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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/orangefs
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/orangefs')
-rw-r--r--fs/orangefs/Kconfig7
-rw-r--r--fs/orangefs/Makefile11
-rw-r--r--fs/orangefs/acl.c198
-rw-r--r--fs/orangefs/dcache.c143
-rw-r--r--fs/orangefs/devorangefs-req.c814
-rw-r--r--fs/orangefs/dir.c404
-rw-r--r--fs/orangefs/downcall.h137
-rw-r--r--fs/orangefs/file.c565
-rw-r--r--fs/orangefs/inode.c1141
-rw-r--r--fs/orangefs/namei.c446
-rw-r--r--fs/orangefs/orangefs-bufmap.c549
-rw-r--r--fs/orangefs/orangefs-bufmap.h39
-rw-r--r--fs/orangefs/orangefs-cache.c164
-rw-r--r--fs/orangefs/orangefs-debug.h89
-rw-r--r--fs/orangefs/orangefs-debugfs.c1010
-rw-r--r--fs/orangefs/orangefs-debugfs.h7
-rw-r--r--fs/orangefs/orangefs-dev-proto.h61
-rw-r--r--fs/orangefs/orangefs-kernel.h492
-rw-r--r--fs/orangefs/orangefs-mod.c231
-rw-r--r--fs/orangefs/orangefs-sysfs.c1326
-rw-r--r--fs/orangefs/orangefs-sysfs.h2
-rw-r--r--fs/orangefs/orangefs-utils.c560
-rw-r--r--fs/orangefs/protocol.h362
-rw-r--r--fs/orangefs/super.c665
-rw-r--r--fs/orangefs/symlink.c19
-rw-r--r--fs/orangefs/upcall.h260
-rw-r--r--fs/orangefs/waitqueue.c373
-rw-r--r--fs/orangefs/xattr.c562
28 files changed, 10637 insertions, 0 deletions
diff --git a/fs/orangefs/Kconfig b/fs/orangefs/Kconfig
new file mode 100644
index 000000000..890c0ae9a
--- /dev/null
+++ b/fs/orangefs/Kconfig
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config ORANGEFS_FS
+ tristate "ORANGEFS (Powered by PVFS) support"
+ select FS_POSIX_ACL
+ help
+ Orange is a parallel file system designed for use on high end
+ computing (HEC) systems.
diff --git a/fs/orangefs/Makefile b/fs/orangefs/Makefile
new file mode 100644
index 000000000..9b6c50bb1
--- /dev/null
+++ b/fs/orangefs/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the ORANGEFS filesystem.
+#
+
+obj-$(CONFIG_ORANGEFS_FS) += orangefs.o
+
+orangefs-objs := acl.o file.o orangefs-cache.o orangefs-utils.o xattr.o \
+ dcache.o inode.o orangefs-sysfs.o orangefs-mod.o super.o \
+ devorangefs-req.o namei.o symlink.o dir.o orangefs-bufmap.o \
+ orangefs-debugfs.o waitqueue.o
diff --git a/fs/orangefs/acl.c b/fs/orangefs/acl.c
new file mode 100644
index 000000000..605e5a350
--- /dev/null
+++ b/fs/orangefs/acl.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+#include <linux/posix_acl_xattr.h>
+
+struct posix_acl *orangefs_get_acl(struct inode *inode, int type, bool rcu)
+{
+ struct posix_acl *acl;
+ int ret;
+ char *key = NULL, *value = NULL;
+
+ if (rcu)
+ return ERR_PTR(-ECHILD);
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ key = XATTR_NAME_POSIX_ACL_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ key = XATTR_NAME_POSIX_ACL_DEFAULT;
+ break;
+ default:
+ gossip_err("orangefs_get_acl: bogus value of type %d\n", type);
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * Rather than incurring a network call just to determine the exact
+ * length of the attribute, I just allocate a max length to save on
+ * the network call. Conceivably, we could pass NULL to
+ * orangefs_inode_getxattr() to probe the length of the value, but
+ * I don't do that for now.
+ */
+ value = kmalloc(ORANGEFS_MAX_XATTR_VALUELEN, GFP_KERNEL);
+ if (!value)
+ return ERR_PTR(-ENOMEM);
+
+ gossip_debug(GOSSIP_ACL_DEBUG,
+ "inode %pU, key %s, type %d\n",
+ get_khandle_from_ino(inode),
+ key,
+ type);
+ ret = orangefs_inode_getxattr(inode, key, value,
+ ORANGEFS_MAX_XATTR_VALUELEN);
+ /* if the key exists, convert it to an in-memory rep */
+ if (ret > 0) {
+ acl = posix_acl_from_xattr(&init_user_ns, value, ret);
+ } else if (ret == -ENODATA || ret == -ENOSYS) {
+ acl = NULL;
+ } else {
+ gossip_err("inode %pU retrieving acl's failed with error %d\n",
+ get_khandle_from_ino(inode),
+ ret);
+ acl = ERR_PTR(ret);
+ }
+ /* kfree(NULL) is safe, so don't worry if value ever got used */
+ kfree(value);
+ return acl;
+}
+
+static int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl,
+ int type)
+{
+ int error = 0;
+ void *value = NULL;
+ size_t size = 0;
+ const char *name = NULL;
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ name = XATTR_NAME_POSIX_ACL_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ name = XATTR_NAME_POSIX_ACL_DEFAULT;
+ break;
+ default:
+ gossip_err("%s: invalid type %d!\n", __func__, type);
+ return -EINVAL;
+ }
+
+ gossip_debug(GOSSIP_ACL_DEBUG,
+ "%s: inode %pU, key %s type %d\n",
+ __func__, get_khandle_from_ino(inode),
+ name,
+ type);
+
+ if (acl) {
+ size = posix_acl_xattr_size(acl->a_count);
+ value = kmalloc(size, GFP_KERNEL);
+ if (!value)
+ return -ENOMEM;
+
+ error = posix_acl_to_xattr(&init_user_ns, acl, value, size);
+ if (error < 0)
+ goto out;
+ }
+
+ gossip_debug(GOSSIP_ACL_DEBUG,
+ "%s: name %s, value %p, size %zd, acl %p\n",
+ __func__, name, value, size, acl);
+ /*
+ * Go ahead and set the extended attribute now. NOTE: Suppose acl
+ * was NULL, then value will be NULL and size will be 0 and that
+ * will xlate to a removexattr. However, we don't want removexattr
+ * complain if attributes does not exist.
+ */
+ error = orangefs_inode_setxattr(inode, name, value, size, 0);
+
+out:
+ kfree(value);
+ if (!error)
+ set_cached_acl(inode, type, acl);
+ return error;
+}
+
+int orangefs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
+ struct posix_acl *acl, int type)
+{
+ int error;
+ struct iattr iattr;
+ int rc;
+
+ memset(&iattr, 0, sizeof iattr);
+
+ if (type == ACL_TYPE_ACCESS && acl) {
+ /*
+ * posix_acl_update_mode checks to see if the permissions
+ * described by the ACL can be encoded into the
+ * object's mode. If so, it sets "acl" to NULL
+ * and "mode" to the new desired value. It is up to
+ * us to propagate the new mode back to the server...
+ */
+ error = posix_acl_update_mode(&init_user_ns, inode,
+ &iattr.ia_mode, &acl);
+ if (error) {
+ gossip_err("%s: posix_acl_update_mode err: %d\n",
+ __func__,
+ error);
+ return error;
+ }
+
+ if (inode->i_mode != iattr.ia_mode)
+ iattr.ia_valid = ATTR_MODE;
+
+ }
+
+ rc = __orangefs_set_acl(inode, acl, type);
+
+ if (!rc && (iattr.ia_valid == ATTR_MODE))
+ rc = __orangefs_setattr(inode, &iattr);
+
+ return rc;
+}
+
+int orangefs_init_acl(struct inode *inode, struct inode *dir)
+{
+ struct posix_acl *default_acl, *acl;
+ umode_t mode = inode->i_mode;
+ struct iattr iattr;
+ int error = 0;
+
+ error = posix_acl_create(dir, &mode, &default_acl, &acl);
+ if (error)
+ return error;
+
+ if (default_acl) {
+ error = __orangefs_set_acl(inode, default_acl,
+ ACL_TYPE_DEFAULT);
+ posix_acl_release(default_acl);
+ } else {
+ inode->i_default_acl = NULL;
+ }
+
+ if (acl) {
+ if (!error)
+ error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
+ posix_acl_release(acl);
+ } else {
+ inode->i_acl = NULL;
+ }
+
+ /* If mode of the inode was changed, then do a forcible ->setattr */
+ if (mode != inode->i_mode) {
+ memset(&iattr, 0, sizeof iattr);
+ inode->i_mode = mode;
+ iattr.ia_mode = mode;
+ iattr.ia_valid |= ATTR_MODE;
+ __orangefs_setattr(inode, &iattr);
+ }
+
+ return error;
+}
diff --git a/fs/orangefs/dcache.c b/fs/orangefs/dcache.c
new file mode 100644
index 000000000..8bbe9486e
--- /dev/null
+++ b/fs/orangefs/dcache.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Implementation of dentry (directory cache) functions.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+
+/* Returns 1 if dentry can still be trusted, else 0. */
+static int orangefs_revalidate_lookup(struct dentry *dentry)
+{
+ struct dentry *parent_dentry = dget_parent(dentry);
+ struct inode *parent_inode = parent_dentry->d_inode;
+ struct orangefs_inode_s *parent = ORANGEFS_I(parent_inode);
+ struct inode *inode = dentry->d_inode;
+ struct orangefs_kernel_op_s *new_op;
+ int ret = 0;
+ int err = 0;
+
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: attempting lookup.\n", __func__);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
+ if (!new_op) {
+ ret = -ENOMEM;
+ goto out_put_parent;
+ }
+
+ new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
+ new_op->upcall.req.lookup.parent_refn = parent->refn;
+ strncpy(new_op->upcall.req.lookup.d_name,
+ dentry->d_name.name,
+ ORANGEFS_NAME_MAX - 1);
+
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s:%s:%d interrupt flag [%d]\n",
+ __FILE__,
+ __func__,
+ __LINE__,
+ get_interruptible_flag(parent_inode));
+
+ err = service_operation(new_op, "orangefs_lookup",
+ get_interruptible_flag(parent_inode));
+
+ /* Positive dentry: reject if error or not the same inode. */
+ if (inode) {
+ if (err) {
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s:%s:%d lookup failure.\n",
+ __FILE__, __func__, __LINE__);
+ goto out_drop;
+ }
+ if (!match_handle(new_op->downcall.resp.lookup.refn.khandle,
+ inode)) {
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s:%s:%d no match.\n",
+ __FILE__, __func__, __LINE__);
+ goto out_drop;
+ }
+
+ /* Negative dentry: reject if success or error other than ENOENT. */
+ } else {
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: negative dentry.\n",
+ __func__);
+ if (!err || err != -ENOENT) {
+ if (new_op->downcall.status != 0)
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s:%s:%d lookup failure.\n",
+ __FILE__, __func__, __LINE__);
+ goto out_drop;
+ }
+ }
+
+ orangefs_set_timeout(dentry);
+ ret = 1;
+out_release_op:
+ op_release(new_op);
+out_put_parent:
+ dput(parent_dentry);
+ return ret;
+out_drop:
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s:%s:%d revalidate failed\n",
+ __FILE__, __func__, __LINE__);
+ goto out_release_op;
+}
+
+/*
+ * Verify that dentry is valid.
+ *
+ * Should return 1 if dentry can still be trusted, else 0.
+ */
+static int orangefs_d_revalidate(struct dentry *dentry, unsigned int flags)
+{
+ int ret;
+ unsigned long time = (unsigned long) dentry->d_fsdata;
+
+ if (time_before(jiffies, time))
+ return 1;
+
+ if (flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: called on dentry %p.\n",
+ __func__, dentry);
+
+ /* skip root handle lookups. */
+ if (dentry->d_inode && is_root_handle(dentry->d_inode))
+ return 1;
+
+ /*
+ * If this passes, the positive dentry still exists or the negative
+ * dentry still does not exist.
+ */
+ if (!orangefs_revalidate_lookup(dentry))
+ return 0;
+
+ /* We do not need to continue with negative dentries. */
+ if (!dentry->d_inode) {
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s: negative dentry or positive dentry and inode valid.\n",
+ __func__);
+ return 1;
+ }
+
+ /* Now we must perform a getattr to validate the inode contents. */
+
+ ret = orangefs_inode_check_changed(dentry->d_inode);
+ if (ret < 0) {
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s:%s:%d getattr failure.\n",
+ __FILE__, __func__, __LINE__);
+ return 0;
+ }
+ return !ret;
+}
+
+const struct dentry_operations orangefs_dentry_operations = {
+ .d_revalidate = orangefs_d_revalidate,
+};
diff --git a/fs/orangefs/devorangefs-req.c b/fs/orangefs/devorangefs-req.c
new file mode 100644
index 000000000..33ee8cb32
--- /dev/null
+++ b/fs/orangefs/devorangefs-req.c
@@ -0,0 +1,814 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * Changes by Acxiom Corporation to add protocol version to kernel
+ * communication, Copyright Acxiom Corporation, 2005.
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-dev-proto.h"
+#include "orangefs-bufmap.h"
+#include "orangefs-debugfs.h"
+
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+
+/* this file implements the /dev/pvfs2-req device node */
+
+uint32_t orangefs_userspace_version;
+
+static int open_access_count;
+
+static DEFINE_MUTEX(devreq_mutex);
+
+#define DUMP_DEVICE_ERROR() \
+do { \
+ gossip_err("*****************************************************\n");\
+ gossip_err("ORANGEFS Device Error: You cannot open the device file "); \
+ gossip_err("\n/dev/%s more than once. Please make sure that\nthere " \
+ "are no ", ORANGEFS_REQDEVICE_NAME); \
+ gossip_err("instances of a program using this device\ncurrently " \
+ "running. (You must verify this!)\n"); \
+ gossip_err("For example, you can use the lsof program as follows:\n");\
+ gossip_err("'lsof | grep %s' (run this as root)\n", \
+ ORANGEFS_REQDEVICE_NAME); \
+ gossip_err(" open_access_count = %d\n", open_access_count); \
+ gossip_err("*****************************************************\n");\
+} while (0)
+
+static int hash_func(__u64 tag, int table_size)
+{
+ return do_div(tag, (unsigned int)table_size);
+}
+
+static void orangefs_devreq_add_op(struct orangefs_kernel_op_s *op)
+{
+ int index = hash_func(op->tag, hash_table_size);
+
+ list_add_tail(&op->list, &orangefs_htable_ops_in_progress[index]);
+}
+
+/*
+ * find the op with this tag and remove it from the in progress
+ * hash table.
+ */
+static struct orangefs_kernel_op_s *orangefs_devreq_remove_op(__u64 tag)
+{
+ struct orangefs_kernel_op_s *op, *next;
+ int index;
+
+ index = hash_func(tag, hash_table_size);
+
+ spin_lock(&orangefs_htable_ops_in_progress_lock);
+ list_for_each_entry_safe(op,
+ next,
+ &orangefs_htable_ops_in_progress[index],
+ list) {
+ if (op->tag == tag && !op_state_purged(op) &&
+ !op_state_given_up(op)) {
+ list_del_init(&op->list);
+ spin_unlock(&orangefs_htable_ops_in_progress_lock);
+ return op;
+ }
+ }
+
+ spin_unlock(&orangefs_htable_ops_in_progress_lock);
+ return NULL;
+}
+
+/* Returns whether any FS are still pending remounted */
+static int mark_all_pending_mounts(void)
+{
+ int unmounted = 1;
+ struct orangefs_sb_info_s *orangefs_sb = NULL;
+
+ spin_lock(&orangefs_superblocks_lock);
+ list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
+ /* All of these file system require a remount */
+ orangefs_sb->mount_pending = 1;
+ unmounted = 0;
+ }
+ spin_unlock(&orangefs_superblocks_lock);
+ return unmounted;
+}
+
+/*
+ * Determine if a given file system needs to be remounted or not
+ * Returns -1 on error
+ * 0 if already mounted
+ * 1 if needs remount
+ */
+static int fs_mount_pending(__s32 fsid)
+{
+ int mount_pending = -1;
+ struct orangefs_sb_info_s *orangefs_sb = NULL;
+
+ spin_lock(&orangefs_superblocks_lock);
+ list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
+ if (orangefs_sb->fs_id == fsid) {
+ mount_pending = orangefs_sb->mount_pending;
+ break;
+ }
+ }
+ spin_unlock(&orangefs_superblocks_lock);
+ return mount_pending;
+}
+
+static int orangefs_devreq_open(struct inode *inode, struct file *file)
+{
+ int ret = -EINVAL;
+
+ /* in order to ensure that the filesystem driver sees correct UIDs */
+ if (file->f_cred->user_ns != &init_user_ns) {
+ gossip_err("%s: device cannot be opened outside init_user_ns\n",
+ __func__);
+ goto out;
+ }
+
+ if (!(file->f_flags & O_NONBLOCK)) {
+ gossip_err("%s: device cannot be opened in blocking mode\n",
+ __func__);
+ goto out;
+ }
+ ret = -EACCES;
+ gossip_debug(GOSSIP_DEV_DEBUG, "client-core: opening device\n");
+ mutex_lock(&devreq_mutex);
+
+ if (open_access_count == 0) {
+ open_access_count = 1;
+ ret = 0;
+ } else {
+ DUMP_DEVICE_ERROR();
+ }
+ mutex_unlock(&devreq_mutex);
+
+out:
+
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "pvfs2-client-core: open device complete (ret = %d)\n",
+ ret);
+ return ret;
+}
+
+/* Function for read() callers into the device */
+static ssize_t orangefs_devreq_read(struct file *file,
+ char __user *buf,
+ size_t count, loff_t *offset)
+{
+ struct orangefs_kernel_op_s *op, *temp;
+ __s32 proto_ver = ORANGEFS_KERNEL_PROTO_VERSION;
+ static __s32 magic = ORANGEFS_DEVREQ_MAGIC;
+ struct orangefs_kernel_op_s *cur_op;
+ unsigned long ret;
+
+ /* We do not support blocking IO. */
+ if (!(file->f_flags & O_NONBLOCK)) {
+ gossip_err("%s: blocking read from client-core.\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ /*
+ * The client will do an ioctl to find MAX_DEV_REQ_UPSIZE, then
+ * always read with that size buffer.
+ */
+ if (count != MAX_DEV_REQ_UPSIZE) {
+ gossip_err("orangefs: client-core tried to read wrong size\n");
+ return -EINVAL;
+ }
+
+ /* Check for an empty list before locking. */
+ if (list_empty(&orangefs_request_list))
+ return -EAGAIN;
+
+restart:
+ cur_op = NULL;
+ /* Get next op (if any) from top of list. */
+ spin_lock(&orangefs_request_list_lock);
+ list_for_each_entry_safe(op, temp, &orangefs_request_list, list) {
+ __s32 fsid;
+ /* This lock is held past the end of the loop when we break. */
+ spin_lock(&op->lock);
+ if (unlikely(op_state_purged(op) || op_state_given_up(op))) {
+ spin_unlock(&op->lock);
+ continue;
+ }
+
+ fsid = fsid_of_op(op);
+ if (fsid != ORANGEFS_FS_ID_NULL) {
+ int ret;
+ /* Skip ops whose filesystem needs to be mounted. */
+ ret = fs_mount_pending(fsid);
+ if (ret == 1) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: mount pending, skipping op tag "
+ "%llu %s\n",
+ __func__,
+ llu(op->tag),
+ get_opname_string(op));
+ spin_unlock(&op->lock);
+ continue;
+ /*
+ * Skip ops whose filesystem we don't know about unless
+ * it is being mounted or unmounted. It is possible for
+ * a filesystem we don't know about to be unmounted if
+ * it fails to mount in the kernel after userspace has
+ * been sent the mount request.
+ */
+ /* XXX: is there a better way to detect this? */
+ } else if (ret == -1 &&
+ !(op->upcall.type ==
+ ORANGEFS_VFS_OP_FS_MOUNT ||
+ op->upcall.type ==
+ ORANGEFS_VFS_OP_GETATTR ||
+ op->upcall.type ==
+ ORANGEFS_VFS_OP_FS_UMOUNT)) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "orangefs: skipping op tag %llu %s\n",
+ llu(op->tag), get_opname_string(op));
+ gossip_err(
+ "orangefs: ERROR: fs_mount_pending %d\n",
+ fsid);
+ spin_unlock(&op->lock);
+ continue;
+ }
+ }
+ /*
+ * Either this op does not pertain to a filesystem, is mounting
+ * a filesystem, or pertains to a mounted filesystem. Let it
+ * through.
+ */
+ cur_op = op;
+ break;
+ }
+
+ /*
+ * At this point we either have a valid op and can continue or have not
+ * found an op and must ask the client to try again later.
+ */
+ if (!cur_op) {
+ spin_unlock(&orangefs_request_list_lock);
+ return -EAGAIN;
+ }
+
+ gossip_debug(GOSSIP_DEV_DEBUG, "%s: reading op tag %llu %s\n",
+ __func__,
+ llu(cur_op->tag),
+ get_opname_string(cur_op));
+
+ /*
+ * Such an op should never be on the list in the first place. If so, we
+ * will abort.
+ */
+ if (op_state_in_progress(cur_op) || op_state_serviced(cur_op)) {
+ gossip_err("orangefs: ERROR: Current op already queued.\n");
+ list_del_init(&cur_op->list);
+ spin_unlock(&cur_op->lock);
+ spin_unlock(&orangefs_request_list_lock);
+ return -EAGAIN;
+ }
+
+ list_del_init(&cur_op->list);
+ spin_unlock(&orangefs_request_list_lock);
+
+ spin_unlock(&cur_op->lock);
+
+ /* Push the upcall out. */
+ ret = copy_to_user(buf, &proto_ver, sizeof(__s32));
+ if (ret != 0)
+ goto error;
+ ret = copy_to_user(buf + sizeof(__s32), &magic, sizeof(__s32));
+ if (ret != 0)
+ goto error;
+ ret = copy_to_user(buf + 2 * sizeof(__s32),
+ &cur_op->tag,
+ sizeof(__u64));
+ if (ret != 0)
+ goto error;
+ ret = copy_to_user(buf + 2 * sizeof(__s32) + sizeof(__u64),
+ &cur_op->upcall,
+ sizeof(struct orangefs_upcall_s));
+ if (ret != 0)
+ goto error;
+
+ spin_lock(&orangefs_htable_ops_in_progress_lock);
+ spin_lock(&cur_op->lock);
+ if (unlikely(op_state_given_up(cur_op))) {
+ spin_unlock(&cur_op->lock);
+ spin_unlock(&orangefs_htable_ops_in_progress_lock);
+ complete(&cur_op->waitq);
+ goto restart;
+ }
+
+ /*
+ * Set the operation to be in progress and move it between lists since
+ * it has been sent to the client.
+ */
+ set_op_state_inprogress(cur_op);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: 1 op:%s: op_state:%d: process:%s:\n",
+ __func__,
+ get_opname_string(cur_op),
+ cur_op->op_state,
+ current->comm);
+ orangefs_devreq_add_op(cur_op);
+ spin_unlock(&cur_op->lock);
+ spin_unlock(&orangefs_htable_ops_in_progress_lock);
+
+ /* The client only asks to read one size buffer. */
+ return MAX_DEV_REQ_UPSIZE;
+error:
+ /*
+ * We were unable to copy the op data to the client. Put the op back in
+ * list. If client has crashed, the op will be purged later when the
+ * device is released.
+ */
+ gossip_err("orangefs: Failed to copy data to user space\n");
+ spin_lock(&orangefs_request_list_lock);
+ spin_lock(&cur_op->lock);
+ if (likely(!op_state_given_up(cur_op))) {
+ set_op_state_waiting(cur_op);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: 2 op:%s: op_state:%d: process:%s:\n",
+ __func__,
+ get_opname_string(cur_op),
+ cur_op->op_state,
+ current->comm);
+ list_add(&cur_op->list, &orangefs_request_list);
+ spin_unlock(&cur_op->lock);
+ } else {
+ spin_unlock(&cur_op->lock);
+ complete(&cur_op->waitq);
+ }
+ spin_unlock(&orangefs_request_list_lock);
+ return -EFAULT;
+}
+
+/*
+ * Function for writev() callers into the device.
+ *
+ * Userspace should have written:
+ * - __u32 version
+ * - __u32 magic
+ * - __u64 tag
+ * - struct orangefs_downcall_s
+ * - trailer buffer (in the case of READDIR operations)
+ */
+static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb,
+ struct iov_iter *iter)
+{
+ ssize_t ret;
+ struct orangefs_kernel_op_s *op = NULL;
+ struct {
+ __u32 version;
+ __u32 magic;
+ __u64 tag;
+ } head;
+ int total = ret = iov_iter_count(iter);
+ int downcall_size = sizeof(struct orangefs_downcall_s);
+ int head_size = sizeof(head);
+
+ gossip_debug(GOSSIP_DEV_DEBUG, "%s: total:%d: ret:%zd:\n",
+ __func__,
+ total,
+ ret);
+
+ if (total < MAX_DEV_REQ_DOWNSIZE) {
+ gossip_err("%s: total:%d: must be at least:%u:\n",
+ __func__,
+ total,
+ (unsigned int) MAX_DEV_REQ_DOWNSIZE);
+ return -EFAULT;
+ }
+
+ if (!copy_from_iter_full(&head, head_size, iter)) {
+ gossip_err("%s: failed to copy head.\n", __func__);
+ return -EFAULT;
+ }
+
+ if (head.version < ORANGEFS_MINIMUM_USERSPACE_VERSION) {
+ gossip_err("%s: userspace claims version"
+ "%d, minimum version required: %d.\n",
+ __func__,
+ head.version,
+ ORANGEFS_MINIMUM_USERSPACE_VERSION);
+ return -EPROTO;
+ }
+
+ if (head.magic != ORANGEFS_DEVREQ_MAGIC) {
+ gossip_err("Error: Device magic number does not match.\n");
+ return -EPROTO;
+ }
+
+ if (!orangefs_userspace_version) {
+ orangefs_userspace_version = head.version;
+ } else if (orangefs_userspace_version != head.version) {
+ gossip_err("Error: userspace version changes\n");
+ return -EPROTO;
+ }
+
+ /* remove the op from the in progress hash table */
+ op = orangefs_devreq_remove_op(head.tag);
+ if (!op) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: No one's waiting for tag %llu\n",
+ __func__, llu(head.tag));
+ return ret;
+ }
+
+ if (!copy_from_iter_full(&op->downcall, downcall_size, iter)) {
+ gossip_err("%s: failed to copy downcall.\n", __func__);
+ goto Efault;
+ }
+
+ if (op->downcall.status)
+ goto wakeup;
+
+ /*
+ * We've successfully peeled off the head and the downcall.
+ * Something has gone awry if total doesn't equal the
+ * sum of head_size, downcall_size and trailer_size.
+ */
+ if ((head_size + downcall_size + op->downcall.trailer_size) != total) {
+ gossip_err("%s: funky write, head_size:%d"
+ ": downcall_size:%d: trailer_size:%lld"
+ ": total size:%d:\n",
+ __func__,
+ head_size,
+ downcall_size,
+ op->downcall.trailer_size,
+ total);
+ goto Efault;
+ }
+
+ /* Only READDIR operations should have trailers. */
+ if ((op->downcall.type != ORANGEFS_VFS_OP_READDIR) &&
+ (op->downcall.trailer_size != 0)) {
+ gossip_err("%s: %x operation with trailer.",
+ __func__,
+ op->downcall.type);
+ goto Efault;
+ }
+
+ /* READDIR operations should always have trailers. */
+ if ((op->downcall.type == ORANGEFS_VFS_OP_READDIR) &&
+ (op->downcall.trailer_size == 0)) {
+ gossip_err("%s: %x operation with no trailer.",
+ __func__,
+ op->downcall.type);
+ goto Efault;
+ }
+
+ if (op->downcall.type != ORANGEFS_VFS_OP_READDIR)
+ goto wakeup;
+
+ op->downcall.trailer_buf = vzalloc(op->downcall.trailer_size);
+ if (!op->downcall.trailer_buf)
+ goto Enomem;
+
+ if (!copy_from_iter_full(op->downcall.trailer_buf,
+ op->downcall.trailer_size, iter)) {
+ gossip_err("%s: failed to copy trailer.\n", __func__);
+ vfree(op->downcall.trailer_buf);
+ goto Efault;
+ }
+
+wakeup:
+ /*
+ * Return to vfs waitqueue, and back to service_operation
+ * through wait_for_matching_downcall.
+ */
+ spin_lock(&op->lock);
+ if (unlikely(op_is_cancel(op))) {
+ spin_unlock(&op->lock);
+ put_cancel(op);
+ } else if (unlikely(op_state_given_up(op))) {
+ spin_unlock(&op->lock);
+ complete(&op->waitq);
+ } else {
+ set_op_state_serviced(op);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: op:%s: op_state:%d: process:%s:\n",
+ __func__,
+ get_opname_string(op),
+ op->op_state,
+ current->comm);
+ spin_unlock(&op->lock);
+ }
+ return ret;
+
+Efault:
+ op->downcall.status = -(ORANGEFS_ERROR_BIT | 9);
+ ret = -EFAULT;
+ goto wakeup;
+
+Enomem:
+ op->downcall.status = -(ORANGEFS_ERROR_BIT | 8);
+ ret = -ENOMEM;
+ goto wakeup;
+}
+
+/*
+ * NOTE: gets called when the last reference to this device is dropped.
+ * Using the open_access_count variable, we enforce a reference count
+ * on this file so that it can be opened by only one process at a time.
+ * the devreq_mutex is used to make sure all i/o has completed
+ * before we call orangefs_bufmap_finalize, and similar such tricky
+ * situations
+ */
+static int orangefs_devreq_release(struct inode *inode, struct file *file)
+{
+ int unmounted = 0;
+
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s:pvfs2-client-core: exiting, closing device\n",
+ __func__);
+
+ mutex_lock(&devreq_mutex);
+ orangefs_bufmap_finalize();
+
+ open_access_count = -1;
+
+ unmounted = mark_all_pending_mounts();
+ gossip_debug(GOSSIP_DEV_DEBUG, "ORANGEFS Device Close: Filesystem(s) %s\n",
+ (unmounted ? "UNMOUNTED" : "MOUNTED"));
+
+ purge_waiting_ops();
+ purge_inprogress_ops();
+
+ orangefs_bufmap_run_down();
+
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "pvfs2-client-core: device close complete\n");
+ open_access_count = 0;
+ orangefs_userspace_version = 0;
+ mutex_unlock(&devreq_mutex);
+ return 0;
+}
+
+int is_daemon_in_service(void)
+{
+ int in_service;
+
+ /*
+ * What this function does is checks if client-core is alive
+ * based on the access count we maintain on the device.
+ */
+ mutex_lock(&devreq_mutex);
+ in_service = open_access_count == 1 ? 0 : -EIO;
+ mutex_unlock(&devreq_mutex);
+ return in_service;
+}
+
+bool __is_daemon_in_service(void)
+{
+ return open_access_count == 1;
+}
+
+static inline long check_ioctl_command(unsigned int command)
+{
+ /* Check for valid ioctl codes */
+ if (_IOC_TYPE(command) != ORANGEFS_DEV_MAGIC) {
+ gossip_err("device ioctl magic numbers don't match! Did you rebuild pvfs2-client-core/libpvfs2? [cmd %x, magic %x != %x]\n",
+ command,
+ _IOC_TYPE(command),
+ ORANGEFS_DEV_MAGIC);
+ return -EINVAL;
+ }
+ /* and valid ioctl commands */
+ if (_IOC_NR(command) >= ORANGEFS_DEV_MAXNR || _IOC_NR(command) <= 0) {
+ gossip_err("Invalid ioctl command number [%d >= %d]\n",
+ _IOC_NR(command), ORANGEFS_DEV_MAXNR);
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static long dispatch_ioctl_command(unsigned int command, unsigned long arg)
+{
+ static __s32 magic = ORANGEFS_DEVREQ_MAGIC;
+ static __s32 max_up_size = MAX_DEV_REQ_UPSIZE;
+ static __s32 max_down_size = MAX_DEV_REQ_DOWNSIZE;
+ struct ORANGEFS_dev_map_desc user_desc;
+ int ret = 0;
+ int upstream_kmod = 1;
+ struct orangefs_sb_info_s *orangefs_sb;
+
+ /* mtmoore: add locking here */
+
+ switch (command) {
+ case ORANGEFS_DEV_GET_MAGIC:
+ return ((put_user(magic, (__s32 __user *) arg) == -EFAULT) ?
+ -EIO :
+ 0);
+ case ORANGEFS_DEV_GET_MAX_UPSIZE:
+ return ((put_user(max_up_size,
+ (__s32 __user *) arg) == -EFAULT) ?
+ -EIO :
+ 0);
+ case ORANGEFS_DEV_GET_MAX_DOWNSIZE:
+ return ((put_user(max_down_size,
+ (__s32 __user *) arg) == -EFAULT) ?
+ -EIO :
+ 0);
+ case ORANGEFS_DEV_MAP:
+ ret = copy_from_user(&user_desc,
+ (struct ORANGEFS_dev_map_desc __user *)
+ arg,
+ sizeof(struct ORANGEFS_dev_map_desc));
+ /* WTF -EIO and not -EFAULT? */
+ return ret ? -EIO : orangefs_bufmap_initialize(&user_desc);
+ case ORANGEFS_DEV_REMOUNT_ALL:
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: got ORANGEFS_DEV_REMOUNT_ALL\n",
+ __func__);
+
+ /*
+ * remount all mounted orangefs volumes to regain the lost
+ * dynamic mount tables (if any) -- NOTE: this is done
+ * without keeping the superblock list locked due to the
+ * upcall/downcall waiting. also, the request mutex is
+ * used to ensure that no operations will be serviced until
+ * all of the remounts are serviced (to avoid ops between
+ * mounts to fail)
+ */
+ ret = mutex_lock_interruptible(&orangefs_request_mutex);
+ if (ret < 0)
+ return ret;
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: priority remount in progress\n",
+ __func__);
+ spin_lock(&orangefs_superblocks_lock);
+ list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
+ /*
+ * We have to drop the spinlock, so entries can be
+ * removed. They can't be freed, though, so we just
+ * keep the forward pointers and zero the back ones -
+ * that way we can get to the rest of the list.
+ */
+ if (!orangefs_sb->list.prev)
+ continue;
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: Remounting SB %p\n",
+ __func__,
+ orangefs_sb);
+
+ spin_unlock(&orangefs_superblocks_lock);
+ ret = orangefs_remount(orangefs_sb);
+ spin_lock(&orangefs_superblocks_lock);
+ if (ret) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "SB %p remount failed\n",
+ orangefs_sb);
+ break;
+ }
+ }
+ spin_unlock(&orangefs_superblocks_lock);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: priority remount complete\n",
+ __func__);
+ mutex_unlock(&orangefs_request_mutex);
+ return ret;
+
+ case ORANGEFS_DEV_UPSTREAM:
+ ret = copy_to_user((void __user *)arg,
+ &upstream_kmod,
+ sizeof(upstream_kmod));
+
+ if (ret != 0)
+ return -EIO;
+ else
+ return ret;
+
+ case ORANGEFS_DEV_CLIENT_MASK:
+ return orangefs_debugfs_new_client_mask((void __user *)arg);
+ case ORANGEFS_DEV_CLIENT_STRING:
+ return orangefs_debugfs_new_client_string((void __user *)arg);
+ case ORANGEFS_DEV_DEBUG:
+ return orangefs_debugfs_new_debug((void __user *)arg);
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return -ENOIOCTLCMD;
+}
+
+static long orangefs_devreq_ioctl(struct file *file,
+ unsigned int command, unsigned long arg)
+{
+ long ret;
+
+ /* Check for properly constructed commands */
+ ret = check_ioctl_command(command);
+ if (ret < 0)
+ return (int)ret;
+
+ return (int)dispatch_ioctl_command(command, arg);
+}
+
+#ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
+
+/* Compat structure for the ORANGEFS_DEV_MAP ioctl */
+struct ORANGEFS_dev_map_desc32 {
+ compat_uptr_t ptr;
+ __s32 total_size;
+ __s32 size;
+ __s32 count;
+};
+
+/*
+ * 32 bit user-space apps' ioctl handlers when kernel modules
+ * is compiled as a 64 bit one
+ */
+static long orangefs_devreq_compat_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long args)
+{
+ long ret;
+
+ /* Check for properly constructed commands */
+ ret = check_ioctl_command(cmd);
+ if (ret < 0)
+ return ret;
+ if (cmd == ORANGEFS_DEV_MAP) {
+ struct ORANGEFS_dev_map_desc desc;
+ struct ORANGEFS_dev_map_desc32 d32;
+
+ if (copy_from_user(&d32, (void __user *)args, sizeof(d32)))
+ return -EFAULT;
+
+ desc.ptr = compat_ptr(d32.ptr);
+ desc.total_size = d32.total_size;
+ desc.size = d32.size;
+ desc.count = d32.count;
+ return orangefs_bufmap_initialize(&desc);
+ }
+ /* no other ioctl requires translation */
+ return dispatch_ioctl_command(cmd, args);
+}
+
+#endif /* CONFIG_COMPAT is in .config */
+
+static __poll_t orangefs_devreq_poll(struct file *file,
+ struct poll_table_struct *poll_table)
+{
+ __poll_t poll_revent_mask = 0;
+
+ poll_wait(file, &orangefs_request_list_waitq, poll_table);
+
+ if (!list_empty(&orangefs_request_list))
+ poll_revent_mask |= EPOLLIN;
+ return poll_revent_mask;
+}
+
+/* the assigned character device major number */
+static int orangefs_dev_major;
+
+static const struct file_operations orangefs_devreq_file_operations = {
+ .owner = THIS_MODULE,
+ .read = orangefs_devreq_read,
+ .write_iter = orangefs_devreq_write_iter,
+ .open = orangefs_devreq_open,
+ .release = orangefs_devreq_release,
+ .unlocked_ioctl = orangefs_devreq_ioctl,
+
+#ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
+ .compat_ioctl = orangefs_devreq_compat_ioctl,
+#endif
+ .poll = orangefs_devreq_poll
+};
+
+/*
+ * Initialize orangefs device specific state:
+ * Must be called at module load time only
+ */
+int orangefs_dev_init(void)
+{
+ /* register orangefs-req device */
+ orangefs_dev_major = register_chrdev(0,
+ ORANGEFS_REQDEVICE_NAME,
+ &orangefs_devreq_file_operations);
+ if (orangefs_dev_major < 0) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "Failed to register /dev/%s (error %d)\n",
+ ORANGEFS_REQDEVICE_NAME, orangefs_dev_major);
+ return orangefs_dev_major;
+ }
+
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "*** /dev/%s character device registered ***\n",
+ ORANGEFS_REQDEVICE_NAME);
+ gossip_debug(GOSSIP_DEV_DEBUG, "'mknod /dev/%s c %d 0'.\n",
+ ORANGEFS_REQDEVICE_NAME, orangefs_dev_major);
+ return 0;
+}
+
+void orangefs_dev_cleanup(void)
+{
+ unregister_chrdev(orangefs_dev_major, ORANGEFS_REQDEVICE_NAME);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "*** /dev/%s character device unregistered ***\n",
+ ORANGEFS_REQDEVICE_NAME);
+}
diff --git a/fs/orangefs/dir.c b/fs/orangefs/dir.c
new file mode 100644
index 000000000..9cacce5d5
--- /dev/null
+++ b/fs/orangefs/dir.c
@@ -0,0 +1,404 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2017 Omnibond Systems, L.L.C.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+struct orangefs_dir_part {
+ struct orangefs_dir_part *next;
+ size_t len;
+};
+
+struct orangefs_dir {
+ __u64 token;
+ struct orangefs_dir_part *part;
+ loff_t end;
+ int error;
+};
+
+#define PART_SHIFT (24)
+#define PART_SIZE (1<<24)
+#define PART_MASK (~(PART_SIZE - 1))
+
+/*
+ * There can be up to 512 directory entries. Each entry is encoded as
+ * follows:
+ * 4 bytes: string size (n)
+ * n bytes: string
+ * 1 byte: trailing zero
+ * padding to 8 bytes
+ * 16 bytes: khandle
+ * padding to 8 bytes
+ *
+ * The trailer_buf starts with a struct orangefs_readdir_response_s
+ * which must be skipped to get to the directory data.
+ *
+ * The data which is received from the userspace daemon is termed a
+ * part and is stored in a linked list in case more than one part is
+ * needed for a large directory.
+ *
+ * The position pointer (ctx->pos) encodes the part and offset on which
+ * to begin reading at. Bits above PART_SHIFT encode the part and bits
+ * below PART_SHIFT encode the offset. Parts are stored in a linked
+ * list which grows as data is received from the server. The overhead
+ * associated with managing the list is presumed to be small compared to
+ * the overhead of communicating with the server.
+ *
+ * As data is received from the server, it is placed at the end of the
+ * part list. Data is parsed from the current position as it is needed.
+ * When data is determined to be corrupt, it is either because the
+ * userspace component has sent back corrupt data or because the file
+ * pointer has been moved to an invalid location. Since the two cannot
+ * be differentiated, return EIO.
+ *
+ * Part zero is synthesized to contains `.' and `..'. Part one is the
+ * first part of the part list.
+ */
+
+static int do_readdir(struct orangefs_inode_s *oi,
+ struct orangefs_dir *od, struct dentry *dentry,
+ struct orangefs_kernel_op_s *op)
+{
+ struct orangefs_readdir_response_s *resp;
+ int bufi, r;
+
+ /*
+ * Despite the badly named field, readdir does not use shared
+ * memory. However, there are a limited number of readdir
+ * slots, which must be allocated here. This flag simply tells
+ * the op scheduler to return the op here for retry.
+ */
+ op->uses_shared_memory = 1;
+ op->upcall.req.readdir.refn = oi->refn;
+ op->upcall.req.readdir.token = od->token;
+ op->upcall.req.readdir.max_dirent_count =
+ ORANGEFS_MAX_DIRENT_COUNT_READDIR;
+
+again:
+ bufi = orangefs_readdir_index_get();
+ if (bufi < 0) {
+ od->error = bufi;
+ return bufi;
+ }
+
+ op->upcall.req.readdir.buf_index = bufi;
+
+ r = service_operation(op, "orangefs_readdir",
+ get_interruptible_flag(dentry->d_inode));
+
+ orangefs_readdir_index_put(bufi);
+
+ if (op_state_purged(op)) {
+ if (r == -EAGAIN) {
+ vfree(op->downcall.trailer_buf);
+ goto again;
+ } else if (r == -EIO) {
+ vfree(op->downcall.trailer_buf);
+ od->error = r;
+ return r;
+ }
+ }
+
+ if (r < 0) {
+ vfree(op->downcall.trailer_buf);
+ od->error = r;
+ return r;
+ } else if (op->downcall.status) {
+ vfree(op->downcall.trailer_buf);
+ od->error = op->downcall.status;
+ return op->downcall.status;
+ }
+
+ /*
+ * The maximum size is size per entry times the 512 entries plus
+ * the header. This is well under the limit.
+ */
+ if (op->downcall.trailer_size > PART_SIZE) {
+ vfree(op->downcall.trailer_buf);
+ od->error = -EIO;
+ return -EIO;
+ }
+
+ resp = (struct orangefs_readdir_response_s *)
+ op->downcall.trailer_buf;
+ od->token = resp->token;
+ return 0;
+}
+
+static int parse_readdir(struct orangefs_dir *od,
+ struct orangefs_kernel_op_s *op)
+{
+ struct orangefs_dir_part *part, *new;
+ size_t count;
+
+ count = 1;
+ part = od->part;
+ while (part) {
+ count++;
+ if (part->next)
+ part = part->next;
+ else
+ break;
+ }
+
+ new = (void *)op->downcall.trailer_buf;
+ new->next = NULL;
+ new->len = op->downcall.trailer_size -
+ sizeof(struct orangefs_readdir_response_s);
+ if (!od->part)
+ od->part = new;
+ else
+ part->next = new;
+ count++;
+ od->end = count << PART_SHIFT;
+
+ return 0;
+}
+
+static int orangefs_dir_more(struct orangefs_inode_s *oi,
+ struct orangefs_dir *od, struct dentry *dentry)
+{
+ struct orangefs_kernel_op_s *op;
+ int r;
+
+ op = op_alloc(ORANGEFS_VFS_OP_READDIR);
+ if (!op) {
+ od->error = -ENOMEM;
+ return -ENOMEM;
+ }
+ r = do_readdir(oi, od, dentry, op);
+ if (r) {
+ od->error = r;
+ goto out;
+ }
+ r = parse_readdir(od, op);
+ if (r) {
+ od->error = r;
+ goto out;
+ }
+
+ od->error = 0;
+out:
+ op_release(op);
+ return od->error;
+}
+
+static int fill_from_part(struct orangefs_dir_part *part,
+ struct dir_context *ctx)
+{
+ const int offset = sizeof(struct orangefs_readdir_response_s);
+ struct orangefs_khandle *khandle;
+ __u32 *len, padlen;
+ loff_t i;
+ char *s;
+ i = ctx->pos & ~PART_MASK;
+
+ /* The file offset from userspace is too large. */
+ if (i > part->len)
+ return 1;
+
+ /*
+ * If the seek pointer is positioned just before an entry it
+ * should find the next entry.
+ */
+ if (i % 8)
+ i = i + (8 - i%8)%8;
+
+ while (i < part->len) {
+ if (part->len < i + sizeof *len)
+ break;
+ len = (void *)part + offset + i;
+ /*
+ * len is the size of the string itself. padlen is the
+ * total size of the encoded string.
+ */
+ padlen = (sizeof *len + *len + 1) +
+ (8 - (sizeof *len + *len + 1)%8)%8;
+ if (part->len < i + padlen + sizeof *khandle)
+ goto next;
+ s = (void *)part + offset + i + sizeof *len;
+ if (s[*len] != 0)
+ goto next;
+ khandle = (void *)part + offset + i + padlen;
+ if (!dir_emit(ctx, s, *len,
+ orangefs_khandle_to_ino(khandle),
+ DT_UNKNOWN))
+ return 0;
+ i += padlen + sizeof *khandle;
+ i = i + (8 - i%8)%8;
+ BUG_ON(i > part->len);
+ ctx->pos = (ctx->pos & PART_MASK) | i;
+ continue;
+next:
+ i += 8;
+ }
+ return 1;
+}
+
+static int orangefs_dir_fill(struct orangefs_inode_s *oi,
+ struct orangefs_dir *od, struct dentry *dentry,
+ struct dir_context *ctx)
+{
+ struct orangefs_dir_part *part;
+ size_t count;
+
+ count = ((ctx->pos & PART_MASK) >> PART_SHIFT) - 1;
+
+ part = od->part;
+ while (part->next && count) {
+ count--;
+ part = part->next;
+ }
+ /* This means the userspace file offset is invalid. */
+ if (count) {
+ od->error = -EIO;
+ return -EIO;
+ }
+
+ while (part && part->len) {
+ int r;
+ r = fill_from_part(part, ctx);
+ if (r < 0) {
+ od->error = r;
+ return r;
+ } else if (r == 0) {
+ /* Userspace buffer is full. */
+ break;
+ } else {
+ /*
+ * The part ran out of data. Move to the next
+ * part. */
+ ctx->pos = (ctx->pos & PART_MASK) +
+ (1 << PART_SHIFT);
+ part = part->next;
+ }
+ }
+ return 0;
+}
+
+static loff_t orangefs_dir_llseek(struct file *file, loff_t offset,
+ int whence)
+{
+ struct orangefs_dir *od = file->private_data;
+ /*
+ * Delete the stored data so userspace sees new directory
+ * entries.
+ */
+ if (!whence && offset < od->end) {
+ struct orangefs_dir_part *part = od->part;
+ while (part) {
+ struct orangefs_dir_part *next = part->next;
+ vfree(part);
+ part = next;
+ }
+ od->token = ORANGEFS_ITERATE_START;
+ od->part = NULL;
+ od->end = 1 << PART_SHIFT;
+ }
+ return default_llseek(file, offset, whence);
+}
+
+static int orangefs_dir_iterate(struct file *file,
+ struct dir_context *ctx)
+{
+ struct orangefs_inode_s *oi;
+ struct orangefs_dir *od;
+ struct dentry *dentry;
+ int r;
+
+ dentry = file->f_path.dentry;
+ oi = ORANGEFS_I(dentry->d_inode);
+ od = file->private_data;
+
+ if (od->error)
+ return od->error;
+
+ if (ctx->pos == 0) {
+ if (!dir_emit_dot(file, ctx))
+ return 0;
+ ctx->pos++;
+ }
+ if (ctx->pos == 1) {
+ if (!dir_emit_dotdot(file, ctx))
+ return 0;
+ ctx->pos = 1 << PART_SHIFT;
+ }
+
+ /*
+ * The seek position is in the first synthesized part but is not
+ * valid.
+ */
+ if ((ctx->pos & PART_MASK) == 0)
+ return -EIO;
+
+ r = 0;
+
+ /*
+ * Must read more if the user has sought past what has been read
+ * so far. Stop a user who has sought past the end.
+ */
+ while (od->token != ORANGEFS_ITERATE_END &&
+ ctx->pos > od->end) {
+ r = orangefs_dir_more(oi, od, dentry);
+ if (r)
+ return r;
+ }
+ if (od->token == ORANGEFS_ITERATE_END && ctx->pos > od->end)
+ return -EIO;
+
+ /* Then try to fill if there's any left in the buffer. */
+ if (ctx->pos < od->end) {
+ r = orangefs_dir_fill(oi, od, dentry, ctx);
+ if (r)
+ return r;
+ }
+
+ /* Finally get some more and try to fill. */
+ if (od->token != ORANGEFS_ITERATE_END) {
+ r = orangefs_dir_more(oi, od, dentry);
+ if (r)
+ return r;
+ r = orangefs_dir_fill(oi, od, dentry, ctx);
+ }
+
+ return r;
+}
+
+static int orangefs_dir_open(struct inode *inode, struct file *file)
+{
+ struct orangefs_dir *od;
+ file->private_data = kmalloc(sizeof(struct orangefs_dir),
+ GFP_KERNEL);
+ if (!file->private_data)
+ return -ENOMEM;
+ od = file->private_data;
+ od->token = ORANGEFS_ITERATE_START;
+ od->part = NULL;
+ od->end = 1 << PART_SHIFT;
+ od->error = 0;
+ return 0;
+}
+
+static int orangefs_dir_release(struct inode *inode, struct file *file)
+{
+ struct orangefs_dir *od = file->private_data;
+ struct orangefs_dir_part *part = od->part;
+ while (part) {
+ struct orangefs_dir_part *next = part->next;
+ vfree(part);
+ part = next;
+ }
+ kfree(od);
+ return 0;
+}
+
+const struct file_operations orangefs_dir_operations = {
+ .llseek = orangefs_dir_llseek,
+ .read = generic_read_dir,
+ .iterate_shared = orangefs_dir_iterate,
+ .open = orangefs_dir_open,
+ .release = orangefs_dir_release
+};
diff --git a/fs/orangefs/downcall.h b/fs/orangefs/downcall.h
new file mode 100644
index 000000000..ea2332e16
--- /dev/null
+++ b/fs/orangefs/downcall.h
@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Definitions of downcalls used in Linux kernel module.
+ */
+
+#ifndef __DOWNCALL_H
+#define __DOWNCALL_H
+
+/*
+ * Sanitized the device-client core interaction
+ * for clean 32-64 bit usage
+ */
+struct orangefs_io_response {
+ __s64 amt_complete;
+};
+
+struct orangefs_lookup_response {
+ struct orangefs_object_kref refn;
+};
+
+struct orangefs_create_response {
+ struct orangefs_object_kref refn;
+};
+
+struct orangefs_symlink_response {
+ struct orangefs_object_kref refn;
+};
+
+struct orangefs_getattr_response {
+ struct ORANGEFS_sys_attr_s attributes;
+ char link_target[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_mkdir_response {
+ struct orangefs_object_kref refn;
+};
+
+struct orangefs_statfs_response {
+ __s64 block_size;
+ __s64 blocks_total;
+ __s64 blocks_avail;
+ __s64 files_total;
+ __s64 files_avail;
+};
+
+struct orangefs_fs_mount_response {
+ __s32 fs_id;
+ __s32 id;
+ struct orangefs_khandle root_khandle;
+};
+
+/* the getxattr response is the attribute value */
+struct orangefs_getxattr_response {
+ __s32 val_sz;
+ __s32 __pad1;
+ char val[ORANGEFS_MAX_XATTR_VALUELEN];
+};
+
+/* the listxattr response is an array of attribute names */
+struct orangefs_listxattr_response {
+ __s32 returned_count;
+ __s32 __pad1;
+ __u64 token;
+ char key[ORANGEFS_MAX_XATTR_LISTLEN * ORANGEFS_MAX_XATTR_NAMELEN];
+ __s32 keylen;
+ __s32 __pad2;
+ __s32 lengths[ORANGEFS_MAX_XATTR_LISTLEN];
+};
+
+struct orangefs_param_response {
+ union {
+ __s64 value64;
+ __s32 value32[2];
+ } u;
+};
+
+#define PERF_COUNT_BUF_SIZE 4096
+struct orangefs_perf_count_response {
+ char buffer[PERF_COUNT_BUF_SIZE];
+};
+
+#define FS_KEY_BUF_SIZE 4096
+struct orangefs_fs_key_response {
+ __s32 fs_keylen;
+ __s32 __pad1;
+ char fs_key[FS_KEY_BUF_SIZE];
+};
+
+/* 2.9.6 */
+struct orangefs_features_response {
+ __u64 features;
+};
+
+struct orangefs_downcall_s {
+ __s32 type;
+ __s32 status;
+ /* currently trailer is used only by readdir */
+ __s64 trailer_size;
+ char *trailer_buf;
+
+ union {
+ struct orangefs_io_response io;
+ struct orangefs_lookup_response lookup;
+ struct orangefs_create_response create;
+ struct orangefs_symlink_response sym;
+ struct orangefs_getattr_response getattr;
+ struct orangefs_mkdir_response mkdir;
+ struct orangefs_statfs_response statfs;
+ struct orangefs_fs_mount_response fs_mount;
+ struct orangefs_getxattr_response getxattr;
+ struct orangefs_listxattr_response listxattr;
+ struct orangefs_param_response param;
+ struct orangefs_perf_count_response perf_count;
+ struct orangefs_fs_key_response fs_key;
+ struct orangefs_features_response features;
+ } resp;
+};
+
+/*
+ * The readdir response comes in the trailer. It is followed by the
+ * directory entries as described in dir.c.
+ */
+
+struct orangefs_readdir_response_s {
+ __u64 token;
+ __u64 directory_version;
+ __u32 __pad2;
+ __u32 orangefs_dirent_outcount;
+};
+
+#endif /* __DOWNCALL_H */
diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c
new file mode 100644
index 000000000..732661aa2
--- /dev/null
+++ b/fs/orangefs/file.c
@@ -0,0 +1,565 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Linux VFS file operations.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+
+static int flush_racache(struct inode *inode)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op;
+ int ret;
+
+ gossip_debug(GOSSIP_UTILS_DEBUG,
+ "%s: %pU: Handle is %pU | fs_id %d\n", __func__,
+ get_khandle_from_ino(inode), &orangefs_inode->refn.khandle,
+ orangefs_inode->refn.fs_id);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_RA_FLUSH);
+ if (!new_op)
+ return -ENOMEM;
+ new_op->upcall.req.ra_cache_flush.refn = orangefs_inode->refn;
+
+ ret = service_operation(new_op, "orangefs_flush_racache",
+ get_interruptible_flag(inode));
+
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: got return value of %d\n",
+ __func__, ret);
+
+ op_release(new_op);
+ return ret;
+}
+
+/*
+ * Post and wait for the I/O upcall to finish
+ */
+ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inode,
+ loff_t *offset, struct iov_iter *iter, size_t total_size,
+ loff_t readahead_size, struct orangefs_write_range *wr,
+ int *index_return, struct file *file)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
+ struct orangefs_kernel_op_s *new_op = NULL;
+ int buffer_index;
+ ssize_t ret;
+ size_t copy_amount;
+ int open_for_read;
+ int open_for_write;
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_FILE_IO);
+ if (!new_op)
+ return -ENOMEM;
+
+ /* synchronous I/O */
+ new_op->upcall.req.io.readahead_size = readahead_size;
+ new_op->upcall.req.io.io_type = type;
+ new_op->upcall.req.io.refn = orangefs_inode->refn;
+
+populate_shared_memory:
+ /* get a shared buffer index */
+ buffer_index = orangefs_bufmap_get();
+ if (buffer_index < 0) {
+ ret = buffer_index;
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: orangefs_bufmap_get failure (%zd)\n",
+ __func__, ret);
+ goto out;
+ }
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): GET op %p -> buffer_index %d\n",
+ __func__,
+ handle,
+ new_op,
+ buffer_index);
+
+ new_op->uses_shared_memory = 1;
+ new_op->upcall.req.io.buf_index = buffer_index;
+ new_op->upcall.req.io.count = total_size;
+ new_op->upcall.req.io.offset = *offset;
+ if (type == ORANGEFS_IO_WRITE && wr) {
+ new_op->upcall.uid = from_kuid(&init_user_ns, wr->uid);
+ new_op->upcall.gid = from_kgid(&init_user_ns, wr->gid);
+ }
+ /*
+ * Orangefs has no open, and orangefs checks file permissions
+ * on each file access. Posix requires that file permissions
+ * be checked on open and nowhere else. Orangefs-through-the-kernel
+ * needs to seem posix compliant.
+ *
+ * The VFS opens files, even if the filesystem provides no
+ * method. We can see if a file was successfully opened for
+ * read and or for write by looking at file->f_mode.
+ *
+ * When writes are flowing from the page cache, file is no
+ * longer available. We can trust the VFS to have checked
+ * file->f_mode before writing to the page cache.
+ *
+ * The mode of a file might change between when it is opened
+ * and IO commences, or it might be created with an arbitrary mode.
+ *
+ * We'll make sure we don't hit EACCES during the IO stage by
+ * using UID 0. Some of the time we have access without changing
+ * to UID 0 - how to check?
+ */
+ if (file) {
+ open_for_write = file->f_mode & FMODE_WRITE;
+ open_for_read = file->f_mode & FMODE_READ;
+ } else {
+ open_for_write = 1;
+ open_for_read = 0; /* not relevant? */
+ }
+ if ((type == ORANGEFS_IO_WRITE) && open_for_write)
+ new_op->upcall.uid = 0;
+ if ((type == ORANGEFS_IO_READ) && open_for_read)
+ new_op->upcall.uid = 0;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): offset: %llu total_size: %zd\n",
+ __func__,
+ handle,
+ llu(*offset),
+ total_size);
+ /*
+ * Stage 1: copy the buffers into client-core's address space
+ */
+ if (type == ORANGEFS_IO_WRITE && total_size) {
+ ret = orangefs_bufmap_copy_from_iovec(iter, buffer_index,
+ total_size);
+ if (ret < 0) {
+ gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
+ __func__, (long)ret);
+ goto out;
+ }
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): Calling post_io_request with tag (%llu)\n",
+ __func__,
+ handle,
+ llu(new_op->tag));
+
+ /* Stage 2: Service the I/O operation */
+ ret = service_operation(new_op,
+ type == ORANGEFS_IO_WRITE ?
+ "file_write" :
+ "file_read",
+ get_interruptible_flag(inode));
+
+ /*
+ * If service_operation() returns -EAGAIN #and# the operation was
+ * purged from orangefs_request_list or htable_ops_in_progress, then
+ * we know that the client was restarted, causing the shared memory
+ * area to be wiped clean. To restart a write operation in this
+ * case, we must re-copy the data from the user's iovec to a NEW
+ * shared memory location. To restart a read operation, we must get
+ * a new shared memory location.
+ */
+ if (ret == -EAGAIN && op_state_purged(new_op)) {
+ orangefs_bufmap_put(buffer_index);
+ if (type == ORANGEFS_IO_WRITE)
+ iov_iter_revert(iter, total_size);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s:going to repopulate_shared_memory.\n",
+ __func__);
+ goto populate_shared_memory;
+ }
+
+ if (ret < 0) {
+ if (ret == -EINTR) {
+ /*
+ * We can't return EINTR if any data was written,
+ * it's not POSIX. It is minimally acceptable
+ * to give a partial write, the way NFS does.
+ *
+ * It would be optimal to return all or nothing,
+ * but if a userspace write is bigger than
+ * an IO buffer, and the interrupt occurs
+ * between buffer writes, that would not be
+ * possible.
+ */
+ switch (new_op->op_state - OP_VFS_STATE_GIVEN_UP) {
+ /*
+ * If the op was waiting when the interrupt
+ * occurred, then the client-core did not
+ * trigger the write.
+ */
+ case OP_VFS_STATE_WAITING:
+ if (*offset == 0)
+ ret = -EINTR;
+ else
+ ret = 0;
+ break;
+ /*
+ * If the op was in progress when the interrupt
+ * occurred, then the client-core was able to
+ * trigger the write.
+ */
+ case OP_VFS_STATE_INPROGR:
+ if (type == ORANGEFS_IO_READ)
+ ret = -EINTR;
+ else
+ ret = total_size;
+ break;
+ default:
+ gossip_err("%s: unexpected op state :%d:.\n",
+ __func__,
+ new_op->op_state);
+ ret = 0;
+ break;
+ }
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: got EINTR, state:%d: %p\n",
+ __func__,
+ new_op->op_state,
+ new_op);
+ } else {
+ gossip_err("%s: error in %s handle %pU, returning %zd\n",
+ __func__,
+ type == ORANGEFS_IO_READ ?
+ "read from" : "write to",
+ handle, ret);
+ }
+ if (orangefs_cancel_op_in_progress(new_op))
+ return ret;
+
+ goto out;
+ }
+
+ /*
+ * Stage 3: Post copy buffers from client-core's address space
+ */
+ if (type == ORANGEFS_IO_READ && new_op->downcall.resp.io.amt_complete) {
+ /*
+ * NOTE: the iovector can either contain addresses which
+ * can futher be kernel-space or user-space addresses.
+ * or it can pointers to struct page's
+ */
+
+ copy_amount = new_op->downcall.resp.io.amt_complete;
+
+ ret = orangefs_bufmap_copy_to_iovec(iter, buffer_index,
+ copy_amount);
+ if (ret < 0) {
+ gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
+ __func__, (long)ret);
+ goto out;
+ }
+ }
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): Amount %s, returned by the sys-io call:%d\n",
+ __func__,
+ handle,
+ type == ORANGEFS_IO_READ ? "read" : "written",
+ (int)new_op->downcall.resp.io.amt_complete);
+
+ ret = new_op->downcall.resp.io.amt_complete;
+
+out:
+ if (buffer_index >= 0) {
+ orangefs_bufmap_put(buffer_index);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): PUT buffer_index %d\n",
+ __func__, handle, buffer_index);
+ buffer_index = -1;
+ }
+ op_release(new_op);
+ return ret;
+}
+
+int orangefs_revalidate_mapping(struct inode *inode)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct address_space *mapping = inode->i_mapping;
+ unsigned long *bitlock = &orangefs_inode->bitlock;
+ int ret;
+
+ while (1) {
+ ret = wait_on_bit(bitlock, 1, TASK_KILLABLE);
+ if (ret)
+ return ret;
+ spin_lock(&inode->i_lock);
+ if (test_bit(1, bitlock)) {
+ spin_unlock(&inode->i_lock);
+ continue;
+ }
+ if (!time_before(jiffies, orangefs_inode->mapping_time))
+ break;
+ spin_unlock(&inode->i_lock);
+ return 0;
+ }
+
+ set_bit(1, bitlock);
+ smp_wmb();
+ spin_unlock(&inode->i_lock);
+
+ unmap_mapping_range(mapping, 0, 0, 0);
+ ret = filemap_write_and_wait(mapping);
+ if (!ret)
+ ret = invalidate_inode_pages2(mapping);
+
+ orangefs_inode->mapping_time = jiffies +
+ orangefs_cache_timeout_msecs*HZ/1000;
+
+ clear_bit(1, bitlock);
+ smp_mb__after_atomic();
+ wake_up_bit(bitlock, 1);
+
+ return ret;
+}
+
+static ssize_t orangefs_file_read_iter(struct kiocb *iocb,
+ struct iov_iter *iter)
+{
+ int ret;
+ orangefs_stats.reads++;
+
+ down_read(&file_inode(iocb->ki_filp)->i_rwsem);
+ ret = orangefs_revalidate_mapping(file_inode(iocb->ki_filp));
+ if (ret)
+ goto out;
+
+ ret = generic_file_read_iter(iocb, iter);
+out:
+ up_read(&file_inode(iocb->ki_filp)->i_rwsem);
+ return ret;
+}
+
+static ssize_t orangefs_file_write_iter(struct kiocb *iocb,
+ struct iov_iter *iter)
+{
+ int ret;
+ orangefs_stats.writes++;
+
+ if (iocb->ki_pos > i_size_read(file_inode(iocb->ki_filp))) {
+ ret = orangefs_revalidate_mapping(file_inode(iocb->ki_filp));
+ if (ret)
+ return ret;
+ }
+
+ ret = generic_file_write_iter(iocb, iter);
+ return ret;
+}
+
+static vm_fault_t orangefs_fault(struct vm_fault *vmf)
+{
+ struct file *file = vmf->vma->vm_file;
+ int ret;
+ ret = orangefs_inode_getattr(file->f_mapping->host,
+ ORANGEFS_GETATTR_SIZE);
+ if (ret == -ESTALE)
+ ret = -EIO;
+ if (ret) {
+ gossip_err("%s: orangefs_inode_getattr failed, "
+ "ret:%d:.\n", __func__, ret);
+ return VM_FAULT_SIGBUS;
+ }
+ return filemap_fault(vmf);
+}
+
+static const struct vm_operations_struct orangefs_file_vm_ops = {
+ .fault = orangefs_fault,
+ .map_pages = filemap_map_pages,
+ .page_mkwrite = orangefs_page_mkwrite,
+};
+
+/*
+ * Memory map a region of a file.
+ */
+static int orangefs_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ int ret;
+
+ ret = orangefs_revalidate_mapping(file_inode(file));
+ if (ret)
+ return ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "orangefs_file_mmap: called on %pD\n", file);
+
+ /* set the sequential readahead hint */
+ vma->vm_flags |= VM_SEQ_READ;
+ vma->vm_flags &= ~VM_RAND_READ;
+
+ file_accessed(file);
+ vma->vm_ops = &orangefs_file_vm_ops;
+ return 0;
+}
+
+#define mapping_nrpages(idata) ((idata)->nrpages)
+
+/*
+ * Called to notify the module that there are no more references to
+ * this file (i.e. no processes have it open).
+ *
+ * \note Not called when each file is closed.
+ */
+static int orangefs_file_release(struct inode *inode, struct file *file)
+{
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "orangefs_file_release: called on %pD\n",
+ file);
+
+ /*
+ * remove all associated inode pages from the page cache and
+ * readahead cache (if any); this forces an expensive refresh of
+ * data for the next caller of mmap (or 'get_block' accesses)
+ */
+ if (mapping_nrpages(file->f_mapping)) {
+ if (orangefs_features & ORANGEFS_FEATURE_READAHEAD) {
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "calling flush_racache on %pU\n",
+ get_khandle_from_ino(inode));
+ flush_racache(inode);
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "flush_racache finished\n");
+ }
+
+ }
+ return 0;
+}
+
+/*
+ * Push all data for a specific file onto permanent storage.
+ */
+static int orangefs_fsync(struct file *file,
+ loff_t start,
+ loff_t end,
+ int datasync)
+{
+ int ret;
+ struct orangefs_inode_s *orangefs_inode =
+ ORANGEFS_I(file_inode(file));
+ struct orangefs_kernel_op_s *new_op = NULL;
+
+ ret = filemap_write_and_wait_range(file_inode(file)->i_mapping,
+ start, end);
+ if (ret < 0)
+ return ret;
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_FSYNC);
+ if (!new_op)
+ return -ENOMEM;
+ new_op->upcall.req.fsync.refn = orangefs_inode->refn;
+
+ ret = service_operation(new_op,
+ "orangefs_fsync",
+ get_interruptible_flag(file_inode(file)));
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "orangefs_fsync got return value of %d\n",
+ ret);
+
+ op_release(new_op);
+ return ret;
+}
+
+/*
+ * Change the file pointer position for an instance of an open file.
+ *
+ * \note If .llseek is overriden, we must acquire lock as described in
+ * Documentation/filesystems/locking.rst.
+ *
+ * Future upgrade could support SEEK_DATA and SEEK_HOLE but would
+ * require much changes to the FS
+ */
+static loff_t orangefs_file_llseek(struct file *file, loff_t offset, int origin)
+{
+ int ret = -EINVAL;
+ struct inode *inode = file_inode(file);
+
+ if (origin == SEEK_END) {
+ /*
+ * revalidate the inode's file size.
+ * NOTE: We are only interested in file size here,
+ * so we set mask accordingly.
+ */
+ ret = orangefs_inode_getattr(file->f_mapping->host,
+ ORANGEFS_GETATTR_SIZE);
+ if (ret == -ESTALE)
+ ret = -EIO;
+ if (ret) {
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s:%s:%d calling make bad inode\n",
+ __FILE__,
+ __func__,
+ __LINE__);
+ return ret;
+ }
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "orangefs_file_llseek: offset is %ld | origin is %d"
+ " | inode size is %lu\n",
+ (long)offset,
+ origin,
+ (unsigned long)i_size_read(inode));
+
+ return generic_file_llseek(file, offset, origin);
+}
+
+/*
+ * Support local locks (locks that only this kernel knows about)
+ * if Orangefs was mounted -o local_lock.
+ */
+static int orangefs_lock(struct file *filp, int cmd, struct file_lock *fl)
+{
+ int rc = -EINVAL;
+
+ if (ORANGEFS_SB(file_inode(filp)->i_sb)->flags & ORANGEFS_OPT_LOCAL_LOCK) {
+ if (cmd == F_GETLK) {
+ rc = 0;
+ posix_test_lock(filp, fl);
+ } else {
+ rc = posix_lock_file(filp, fl, NULL);
+ }
+ }
+
+ return rc;
+}
+
+static int orangefs_flush(struct file *file, fl_owner_t id)
+{
+ /*
+ * This is vfs_fsync_range(file, 0, LLONG_MAX, 0) without the
+ * service_operation in orangefs_fsync.
+ *
+ * Do not send fsync to OrangeFS server on a close. Do send fsync
+ * on an explicit fsync call. This duplicates historical OrangeFS
+ * behavior.
+ */
+ int r;
+
+ r = filemap_write_and_wait_range(file->f_mapping, 0, LLONG_MAX);
+ if (r > 0)
+ return 0;
+ else
+ return r;
+}
+
+/** ORANGEFS implementation of VFS file operations */
+const struct file_operations orangefs_file_operations = {
+ .llseek = orangefs_file_llseek,
+ .read_iter = orangefs_file_read_iter,
+ .write_iter = orangefs_file_write_iter,
+ .lock = orangefs_lock,
+ .mmap = orangefs_file_mmap,
+ .open = generic_file_open,
+ .splice_read = generic_file_splice_read,
+ .splice_write = iter_file_splice_write,
+ .flush = orangefs_flush,
+ .release = orangefs_file_release,
+ .fsync = orangefs_fsync,
+};
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
new file mode 100644
index 000000000..b3bbb5a57
--- /dev/null
+++ b/fs/orangefs/inode.c
@@ -0,0 +1,1141 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Linux VFS inode operations.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/fileattr.h>
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+static int orangefs_writepage_locked(struct page *page,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = page->mapping->host;
+ struct orangefs_write_range *wr = NULL;
+ struct iov_iter iter;
+ struct bio_vec bv;
+ size_t len, wlen;
+ ssize_t ret;
+ loff_t off;
+
+ set_page_writeback(page);
+
+ len = i_size_read(inode);
+ if (PagePrivate(page)) {
+ wr = (struct orangefs_write_range *)page_private(page);
+ WARN_ON(wr->pos >= len);
+ off = wr->pos;
+ if (off + wr->len > len)
+ wlen = len - off;
+ else
+ wlen = wr->len;
+ } else {
+ WARN_ON(1);
+ off = page_offset(page);
+ if (off + PAGE_SIZE > len)
+ wlen = len - off;
+ else
+ wlen = PAGE_SIZE;
+ }
+ /* Should've been handled in orangefs_invalidate_folio. */
+ WARN_ON(off == len || off + wlen > len);
+
+ bv.bv_page = page;
+ bv.bv_len = wlen;
+ bv.bv_offset = off % PAGE_SIZE;
+ WARN_ON(wlen == 0);
+ iov_iter_bvec(&iter, ITER_SOURCE, &bv, 1, wlen);
+
+ ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
+ len, wr, NULL, NULL);
+ if (ret < 0) {
+ SetPageError(page);
+ mapping_set_error(page->mapping, ret);
+ } else {
+ ret = 0;
+ }
+ kfree(detach_page_private(page));
+ return ret;
+}
+
+static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
+{
+ int ret;
+ ret = orangefs_writepage_locked(page, wbc);
+ unlock_page(page);
+ end_page_writeback(page);
+ return ret;
+}
+
+struct orangefs_writepages {
+ loff_t off;
+ size_t len;
+ kuid_t uid;
+ kgid_t gid;
+ int maxpages;
+ int npages;
+ struct page **pages;
+ struct bio_vec *bv;
+};
+
+static int orangefs_writepages_work(struct orangefs_writepages *ow,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = ow->pages[0]->mapping->host;
+ struct orangefs_write_range *wrp, wr;
+ struct iov_iter iter;
+ ssize_t ret;
+ size_t len;
+ loff_t off;
+ int i;
+
+ len = i_size_read(inode);
+
+ for (i = 0; i < ow->npages; i++) {
+ set_page_writeback(ow->pages[i]);
+ ow->bv[i].bv_page = ow->pages[i];
+ ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE,
+ ow->off + ow->len) -
+ max(ow->off, page_offset(ow->pages[i]));
+ if (i == 0)
+ ow->bv[i].bv_offset = ow->off -
+ page_offset(ow->pages[i]);
+ else
+ ow->bv[i].bv_offset = 0;
+ }
+ iov_iter_bvec(&iter, ITER_SOURCE, ow->bv, ow->npages, ow->len);
+
+ WARN_ON(ow->off >= len);
+ if (ow->off + ow->len > len)
+ ow->len = len - ow->off;
+
+ off = ow->off;
+ wr.uid = ow->uid;
+ wr.gid = ow->gid;
+ ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
+ 0, &wr, NULL, NULL);
+ if (ret < 0) {
+ for (i = 0; i < ow->npages; i++) {
+ SetPageError(ow->pages[i]);
+ mapping_set_error(ow->pages[i]->mapping, ret);
+ if (PagePrivate(ow->pages[i])) {
+ wrp = (struct orangefs_write_range *)
+ page_private(ow->pages[i]);
+ ClearPagePrivate(ow->pages[i]);
+ put_page(ow->pages[i]);
+ kfree(wrp);
+ }
+ end_page_writeback(ow->pages[i]);
+ unlock_page(ow->pages[i]);
+ }
+ } else {
+ ret = 0;
+ for (i = 0; i < ow->npages; i++) {
+ if (PagePrivate(ow->pages[i])) {
+ wrp = (struct orangefs_write_range *)
+ page_private(ow->pages[i]);
+ ClearPagePrivate(ow->pages[i]);
+ put_page(ow->pages[i]);
+ kfree(wrp);
+ }
+ end_page_writeback(ow->pages[i]);
+ unlock_page(ow->pages[i]);
+ }
+ }
+ return ret;
+}
+
+static int orangefs_writepages_callback(struct page *page,
+ struct writeback_control *wbc, void *data)
+{
+ struct orangefs_writepages *ow = data;
+ struct orangefs_write_range *wr;
+ int ret;
+
+ if (!PagePrivate(page)) {
+ unlock_page(page);
+ /* It's not private so there's nothing to write, right? */
+ printk("writepages_callback not private!\n");
+ BUG();
+ return 0;
+ }
+ wr = (struct orangefs_write_range *)page_private(page);
+
+ ret = -1;
+ if (ow->npages == 0) {
+ ow->off = wr->pos;
+ ow->len = wr->len;
+ ow->uid = wr->uid;
+ ow->gid = wr->gid;
+ ow->pages[ow->npages++] = page;
+ ret = 0;
+ goto done;
+ }
+ if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
+ orangefs_writepages_work(ow, wbc);
+ ow->npages = 0;
+ ret = -1;
+ goto done;
+ }
+ if (ow->off + ow->len == wr->pos) {
+ ow->len += wr->len;
+ ow->pages[ow->npages++] = page;
+ ret = 0;
+ goto done;
+ }
+done:
+ if (ret == -1) {
+ if (ow->npages) {
+ orangefs_writepages_work(ow, wbc);
+ ow->npages = 0;
+ }
+ ret = orangefs_writepage_locked(page, wbc);
+ mapping_set_error(page->mapping, ret);
+ unlock_page(page);
+ end_page_writeback(page);
+ } else {
+ if (ow->npages == ow->maxpages) {
+ orangefs_writepages_work(ow, wbc);
+ ow->npages = 0;
+ }
+ }
+ return ret;
+}
+
+static int orangefs_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct orangefs_writepages *ow;
+ struct blk_plug plug;
+ int ret;
+ ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
+ if (!ow)
+ return -ENOMEM;
+ ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
+ ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
+ if (!ow->pages) {
+ kfree(ow);
+ return -ENOMEM;
+ }
+ ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
+ if (!ow->bv) {
+ kfree(ow->pages);
+ kfree(ow);
+ return -ENOMEM;
+ }
+ blk_start_plug(&plug);
+ ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
+ if (ow->npages)
+ ret = orangefs_writepages_work(ow, wbc);
+ blk_finish_plug(&plug);
+ kfree(ow->pages);
+ kfree(ow->bv);
+ kfree(ow);
+ return ret;
+}
+
+static int orangefs_launder_folio(struct folio *);
+
+static void orangefs_readahead(struct readahead_control *rac)
+{
+ loff_t offset;
+ struct iov_iter iter;
+ struct inode *inode = rac->mapping->host;
+ struct xarray *i_pages;
+ struct page *page;
+ loff_t new_start = readahead_pos(rac);
+ int ret;
+ size_t new_len = 0;
+
+ loff_t bytes_remaining = inode->i_size - readahead_pos(rac);
+ loff_t pages_remaining = bytes_remaining / PAGE_SIZE;
+
+ if (pages_remaining >= 1024)
+ new_len = 4194304;
+ else if (pages_remaining > readahead_count(rac))
+ new_len = bytes_remaining;
+
+ if (new_len)
+ readahead_expand(rac, new_start, new_len);
+
+ offset = readahead_pos(rac);
+ i_pages = &rac->mapping->i_pages;
+
+ iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac));
+
+ /* read in the pages. */
+ if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode,
+ &offset, &iter, readahead_length(rac),
+ inode->i_size, NULL, NULL, rac->file)) < 0)
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: wait_for_direct_io failed. \n", __func__);
+ else
+ ret = 0;
+
+ /* clean up. */
+ while ((page = readahead_page(rac))) {
+ page_endio(page, false, ret);
+ put_page(page);
+ }
+}
+
+static int orangefs_read_folio(struct file *file, struct folio *folio)
+{
+ struct inode *inode = folio->mapping->host;
+ struct iov_iter iter;
+ struct bio_vec bv;
+ ssize_t ret;
+ loff_t off; /* offset of this folio in the file */
+
+ if (folio_test_dirty(folio))
+ orangefs_launder_folio(folio);
+
+ off = folio_pos(folio);
+ bv.bv_page = &folio->page;
+ bv.bv_len = folio_size(folio);
+ bv.bv_offset = 0;
+ iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio));
+
+ ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
+ folio_size(folio), inode->i_size, NULL, NULL, file);
+ /* this will only zero remaining unread portions of the folio data */
+ iov_iter_zero(~0U, &iter);
+ /* takes care of potential aliasing */
+ flush_dcache_folio(folio);
+ if (ret < 0) {
+ folio_set_error(folio);
+ } else {
+ folio_mark_uptodate(folio);
+ ret = 0;
+ }
+ /* unlock the folio after the ->read_folio() routine completes */
+ folio_unlock(folio);
+ return ret;
+}
+
+static int orangefs_write_begin(struct file *file,
+ struct address_space *mapping, loff_t pos, unsigned len,
+ struct page **pagep, void **fsdata)
+{
+ struct orangefs_write_range *wr;
+ struct folio *folio;
+ struct page *page;
+ pgoff_t index;
+ int ret;
+
+ index = pos >> PAGE_SHIFT;
+
+ page = grab_cache_page_write_begin(mapping, index);
+ if (!page)
+ return -ENOMEM;
+
+ *pagep = page;
+ folio = page_folio(page);
+
+ if (folio_test_dirty(folio) && !folio_test_private(folio)) {
+ /*
+ * Should be impossible. If it happens, launder the page
+ * since we don't know what's dirty. This will WARN in
+ * orangefs_writepage_locked.
+ */
+ ret = orangefs_launder_folio(folio);
+ if (ret)
+ return ret;
+ }
+ if (folio_test_private(folio)) {
+ struct orangefs_write_range *wr;
+ wr = folio_get_private(folio);
+ if (wr->pos + wr->len == pos &&
+ uid_eq(wr->uid, current_fsuid()) &&
+ gid_eq(wr->gid, current_fsgid())) {
+ wr->len += len;
+ goto okay;
+ } else {
+ ret = orangefs_launder_folio(folio);
+ if (ret)
+ return ret;
+ }
+ }
+
+ wr = kmalloc(sizeof *wr, GFP_KERNEL);
+ if (!wr)
+ return -ENOMEM;
+
+ wr->pos = pos;
+ wr->len = len;
+ wr->uid = current_fsuid();
+ wr->gid = current_fsgid();
+ folio_attach_private(folio, wr);
+okay:
+ return 0;
+}
+
+static int orangefs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
+{
+ struct inode *inode = page->mapping->host;
+ loff_t last_pos = pos + copied;
+
+ /*
+ * No need to use i_size_read() here, the i_size
+ * cannot change under us because we hold the i_mutex.
+ */
+ if (last_pos > inode->i_size)
+ i_size_write(inode, last_pos);
+
+ /* zero the stale part of the page if we did a short copy */
+ if (!PageUptodate(page)) {
+ unsigned from = pos & (PAGE_SIZE - 1);
+ if (copied < len) {
+ zero_user(page, from + copied, len - copied);
+ }
+ /* Set fully written pages uptodate. */
+ if (pos == page_offset(page) &&
+ (len == PAGE_SIZE || pos + len == inode->i_size)) {
+ zero_user_segment(page, from + copied, PAGE_SIZE);
+ SetPageUptodate(page);
+ }
+ }
+
+ set_page_dirty(page);
+ unlock_page(page);
+ put_page(page);
+
+ mark_inode_dirty_sync(file_inode(file));
+ return copied;
+}
+
+static void orangefs_invalidate_folio(struct folio *folio,
+ size_t offset, size_t length)
+{
+ struct orangefs_write_range *wr = folio_get_private(folio);
+
+ if (offset == 0 && length == PAGE_SIZE) {
+ kfree(folio_detach_private(folio));
+ return;
+ /* write range entirely within invalidate range (or equal) */
+ } else if (folio_pos(folio) + offset <= wr->pos &&
+ wr->pos + wr->len <= folio_pos(folio) + offset + length) {
+ kfree(folio_detach_private(folio));
+ /* XXX is this right? only caller in fs */
+ folio_cancel_dirty(folio);
+ return;
+ /* invalidate range chops off end of write range */
+ } else if (wr->pos < folio_pos(folio) + offset &&
+ wr->pos + wr->len <= folio_pos(folio) + offset + length &&
+ folio_pos(folio) + offset < wr->pos + wr->len) {
+ size_t x;
+ x = wr->pos + wr->len - (folio_pos(folio) + offset);
+ WARN_ON(x > wr->len);
+ wr->len -= x;
+ wr->uid = current_fsuid();
+ wr->gid = current_fsgid();
+ /* invalidate range chops off beginning of write range */
+ } else if (folio_pos(folio) + offset <= wr->pos &&
+ folio_pos(folio) + offset + length < wr->pos + wr->len &&
+ wr->pos < folio_pos(folio) + offset + length) {
+ size_t x;
+ x = folio_pos(folio) + offset + length - wr->pos;
+ WARN_ON(x > wr->len);
+ wr->pos += x;
+ wr->len -= x;
+ wr->uid = current_fsuid();
+ wr->gid = current_fsgid();
+ /* invalidate range entirely within write range (punch hole) */
+ } else if (wr->pos < folio_pos(folio) + offset &&
+ folio_pos(folio) + offset + length < wr->pos + wr->len) {
+ /* XXX what do we do here... should not WARN_ON */
+ WARN_ON(1);
+ /* punch hole */
+ /*
+ * should we just ignore this and write it out anyway?
+ * it hardly makes sense
+ */
+ return;
+ /* non-overlapping ranges */
+ } else {
+ /* WARN if they do overlap */
+ if (!((folio_pos(folio) + offset + length <= wr->pos) ^
+ (wr->pos + wr->len <= folio_pos(folio) + offset))) {
+ WARN_ON(1);
+ printk("invalidate range offset %llu length %zu\n",
+ folio_pos(folio) + offset, length);
+ printk("write range offset %llu length %zu\n",
+ wr->pos, wr->len);
+ }
+ return;
+ }
+
+ /*
+ * Above there are returns where wr is freed or where we WARN.
+ * Thus the following runs if wr was modified above.
+ */
+
+ orangefs_launder_folio(folio);
+}
+
+static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
+{
+ return !folio_test_private(folio);
+}
+
+static void orangefs_free_folio(struct folio *folio)
+{
+ kfree(folio_detach_private(folio));
+}
+
+static int orangefs_launder_folio(struct folio *folio)
+{
+ int r = 0;
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = 0,
+ };
+ folio_wait_writeback(folio);
+ if (folio_clear_dirty_for_io(folio)) {
+ r = orangefs_writepage_locked(&folio->page, &wbc);
+ folio_end_writeback(folio);
+ }
+ return r;
+}
+
+static ssize_t orangefs_direct_IO(struct kiocb *iocb,
+ struct iov_iter *iter)
+{
+ /*
+ * Comment from original do_readv_writev:
+ * Common entry point for read/write/readv/writev
+ * This function will dispatch it to either the direct I/O
+ * or buffered I/O path depending on the mount options and/or
+ * augmented/extended metadata attached to the file.
+ * Note: File extended attributes override any mount options.
+ */
+ struct file *file = iocb->ki_filp;
+ loff_t pos = iocb->ki_pos;
+ enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
+ ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
+ loff_t *offset = &pos;
+ struct inode *inode = file->f_mapping->host;
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
+ size_t count = iov_iter_count(iter);
+ ssize_t total_count = 0;
+ ssize_t ret = -EINVAL;
+ int i = 0;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
+ __func__,
+ handle,
+ (int)count);
+
+ if (type == ORANGEFS_IO_WRITE) {
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): proceeding with offset : %llu, "
+ "size %d\n",
+ __func__,
+ handle,
+ llu(*offset),
+ (int)count);
+ }
+
+ if (count == 0) {
+ ret = 0;
+ goto out;
+ }
+
+ while (iov_iter_count(iter)) {
+ size_t each_count = iov_iter_count(iter);
+ size_t amt_complete;
+ i++;
+
+ /* how much to transfer in this loop iteration */
+ if (each_count > orangefs_bufmap_size_query())
+ each_count = orangefs_bufmap_size_query();
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): size of each_count(%d)\n",
+ __func__,
+ handle,
+ (int)each_count);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): BEFORE wait_for_io: offset is %d\n",
+ __func__,
+ handle,
+ (int)*offset);
+
+ ret = wait_for_direct_io(type, inode, offset, iter,
+ each_count, 0, NULL, NULL, file);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): return from wait_for_io:%d\n",
+ __func__,
+ handle,
+ (int)ret);
+
+ if (ret < 0)
+ goto out;
+
+ *offset += ret;
+ total_count += ret;
+ amt_complete = ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): AFTER wait_for_io: offset is %d\n",
+ __func__,
+ handle,
+ (int)*offset);
+
+ /*
+ * if we got a short I/O operations,
+ * fall out and return what we got so far
+ */
+ if (amt_complete < each_count)
+ break;
+ } /*end while */
+
+out:
+ if (total_count > 0)
+ ret = total_count;
+ if (ret > 0) {
+ if (type == ORANGEFS_IO_READ) {
+ file_accessed(file);
+ } else {
+ file_update_time(file);
+ if (*offset > i_size_read(inode))
+ i_size_write(inode, *offset);
+ }
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): Value(%d) returned.\n",
+ __func__,
+ handle,
+ (int)ret);
+
+ return ret;
+}
+
+/** ORANGEFS2 implementation of address space operations */
+static const struct address_space_operations orangefs_address_operations = {
+ .writepage = orangefs_writepage,
+ .readahead = orangefs_readahead,
+ .read_folio = orangefs_read_folio,
+ .writepages = orangefs_writepages,
+ .dirty_folio = filemap_dirty_folio,
+ .write_begin = orangefs_write_begin,
+ .write_end = orangefs_write_end,
+ .invalidate_folio = orangefs_invalidate_folio,
+ .release_folio = orangefs_release_folio,
+ .free_folio = orangefs_free_folio,
+ .launder_folio = orangefs_launder_folio,
+ .direct_IO = orangefs_direct_IO,
+};
+
+vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
+{
+ struct folio *folio = page_folio(vmf->page);
+ struct inode *inode = file_inode(vmf->vma->vm_file);
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ unsigned long *bitlock = &orangefs_inode->bitlock;
+ vm_fault_t ret;
+ struct orangefs_write_range *wr;
+
+ sb_start_pagefault(inode->i_sb);
+
+ if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
+ ret = VM_FAULT_RETRY;
+ goto out;
+ }
+
+ folio_lock(folio);
+ if (folio_test_dirty(folio) && !folio_test_private(folio)) {
+ /*
+ * Should be impossible. If it happens, launder the folio
+ * since we don't know what's dirty. This will WARN in
+ * orangefs_writepage_locked.
+ */
+ if (orangefs_launder_folio(folio)) {
+ ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+ goto out;
+ }
+ }
+ if (folio_test_private(folio)) {
+ wr = folio_get_private(folio);
+ if (uid_eq(wr->uid, current_fsuid()) &&
+ gid_eq(wr->gid, current_fsgid())) {
+ wr->pos = page_offset(vmf->page);
+ wr->len = PAGE_SIZE;
+ goto okay;
+ } else {
+ if (orangefs_launder_folio(folio)) {
+ ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+ goto out;
+ }
+ }
+ }
+ wr = kmalloc(sizeof *wr, GFP_KERNEL);
+ if (!wr) {
+ ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+ goto out;
+ }
+ wr->pos = page_offset(vmf->page);
+ wr->len = PAGE_SIZE;
+ wr->uid = current_fsuid();
+ wr->gid = current_fsgid();
+ folio_attach_private(folio, wr);
+okay:
+
+ file_update_time(vmf->vma->vm_file);
+ if (folio->mapping != inode->i_mapping) {
+ folio_unlock(folio);
+ ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
+ goto out;
+ }
+
+ /*
+ * We mark the folio dirty already here so that when freeze is in
+ * progress, we are guaranteed that writeback during freezing will
+ * see the dirty folio and writeprotect it again.
+ */
+ folio_mark_dirty(folio);
+ folio_wait_stable(folio);
+ ret = VM_FAULT_LOCKED;
+out:
+ sb_end_pagefault(inode->i_sb);
+ return ret;
+}
+
+static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op;
+ loff_t orig_size;
+ int ret = -EINVAL;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
+ __func__,
+ get_khandle_from_ino(inode),
+ &orangefs_inode->refn.khandle,
+ orangefs_inode->refn.fs_id,
+ iattr->ia_size);
+
+ /* Ensure that we have a up to date size, so we know if it changed. */
+ ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
+ if (ret == -ESTALE)
+ ret = -EIO;
+ if (ret) {
+ gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
+ __func__, ret);
+ return ret;
+ }
+ orig_size = i_size_read(inode);
+
+ /* This is truncate_setsize in a different order. */
+ truncate_pagecache(inode, iattr->ia_size);
+ i_size_write(inode, iattr->ia_size);
+ if (iattr->ia_size > orig_size)
+ pagecache_isize_extended(inode, orig_size, iattr->ia_size);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
+ if (!new_op)
+ return -ENOMEM;
+
+ new_op->upcall.req.truncate.refn = orangefs_inode->refn;
+ new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
+
+ ret = service_operation(new_op,
+ __func__,
+ get_interruptible_flag(inode));
+
+ /*
+ * the truncate has no downcall members to retrieve, but
+ * the status value tells us if it went through ok or not
+ */
+ gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
+
+ op_release(new_op);
+
+ if (ret != 0)
+ return ret;
+
+ if (orig_size != i_size_read(inode))
+ iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
+
+ return ret;
+}
+
+int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
+{
+ int ret;
+
+ if (iattr->ia_valid & ATTR_MODE) {
+ if (iattr->ia_mode & (S_ISVTX)) {
+ if (is_root_handle(inode)) {
+ /*
+ * allow sticky bit to be set on root (since
+ * it shows up that way by default anyhow),
+ * but don't show it to the server
+ */
+ iattr->ia_mode -= S_ISVTX;
+ } else {
+ gossip_debug(GOSSIP_UTILS_DEBUG,
+ "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+ if (iattr->ia_mode & (S_ISUID)) {
+ gossip_debug(GOSSIP_UTILS_DEBUG,
+ "Attempting to set setuid bit (not supported); returning EINVAL.\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ if (iattr->ia_valid & ATTR_SIZE) {
+ ret = orangefs_setattr_size(inode, iattr);
+ if (ret)
+ goto out;
+ }
+
+again:
+ spin_lock(&inode->i_lock);
+ if (ORANGEFS_I(inode)->attr_valid) {
+ if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
+ gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
+ ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
+ } else {
+ spin_unlock(&inode->i_lock);
+ write_inode_now(inode, 1);
+ goto again;
+ }
+ } else {
+ ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
+ ORANGEFS_I(inode)->attr_uid = current_fsuid();
+ ORANGEFS_I(inode)->attr_gid = current_fsgid();
+ }
+ setattr_copy(&init_user_ns, inode, iattr);
+ spin_unlock(&inode->i_lock);
+ mark_inode_dirty(inode);
+
+ if (iattr->ia_valid & ATTR_MODE)
+ /* change mod on a file that has ACLs */
+ ret = posix_acl_chmod(&init_user_ns, inode, inode->i_mode);
+
+ ret = 0;
+out:
+ return ret;
+}
+
+/*
+ * Change attributes of an object referenced by dentry.
+ */
+int orangefs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
+ struct iattr *iattr)
+{
+ int ret;
+ gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
+ dentry);
+ ret = setattr_prepare(&init_user_ns, dentry, iattr);
+ if (ret)
+ goto out;
+ ret = __orangefs_setattr(d_inode(dentry), iattr);
+ sync_inode_metadata(d_inode(dentry), 1);
+out:
+ gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
+ ret);
+ return ret;
+}
+
+/*
+ * Obtain attributes of an object given a dentry
+ */
+int orangefs_getattr(struct user_namespace *mnt_userns, const struct path *path,
+ struct kstat *stat, u32 request_mask, unsigned int flags)
+{
+ int ret;
+ struct inode *inode = path->dentry->d_inode;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "orangefs_getattr: called on %pd mask %u\n",
+ path->dentry, request_mask);
+
+ ret = orangefs_inode_getattr(inode,
+ request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
+ if (ret == 0) {
+ generic_fillattr(&init_user_ns, inode, stat);
+
+ /* override block size reported to stat */
+ if (!(request_mask & STATX_SIZE))
+ stat->result_mask &= ~STATX_SIZE;
+
+ generic_fill_statx_attr(inode, stat);
+ }
+ return ret;
+}
+
+int orangefs_permission(struct user_namespace *mnt_userns,
+ struct inode *inode, int mask)
+{
+ int ret;
+
+ if (mask & MAY_NOT_BLOCK)
+ return -ECHILD;
+
+ gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
+
+ /* Make sure the permission (and other common attrs) are up to date. */
+ ret = orangefs_inode_getattr(inode, 0);
+ if (ret < 0)
+ return ret;
+
+ return generic_permission(&init_user_ns, inode, mask);
+}
+
+int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
+{
+ struct iattr iattr;
+ gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
+ get_khandle_from_ino(inode));
+ generic_update_time(inode, time, flags);
+ memset(&iattr, 0, sizeof iattr);
+ if (flags & S_ATIME)
+ iattr.ia_valid |= ATTR_ATIME;
+ if (flags & S_CTIME)
+ iattr.ia_valid |= ATTR_CTIME;
+ if (flags & S_MTIME)
+ iattr.ia_valid |= ATTR_MTIME;
+ return __orangefs_setattr(inode, &iattr);
+}
+
+static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
+{
+ u64 val = 0;
+ int ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
+ dentry);
+
+ ret = orangefs_inode_getxattr(d_inode(dentry),
+ "user.pvfs2.meta_hint",
+ &val, sizeof(val));
+ if (ret < 0 && ret != -ENODATA)
+ return ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
+
+ fileattr_fill_flags(fa, val);
+ return 0;
+}
+
+static int orangefs_fileattr_set(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct fileattr *fa)
+{
+ u64 val = 0;
+
+ gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
+ dentry);
+ /*
+ * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
+ * turned on for a file. The user is not allowed to turn on this bit,
+ * but the bit is present if the user first gets the flags and then
+ * updates the flags with some new settings. So, we ignore it in the
+ * following edit. bligon.
+ */
+ if (fileattr_has_fsx(fa) ||
+ (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
+ gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
+ __func__);
+ return -EOPNOTSUPP;
+ }
+ val = fa->flags;
+ gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
+ return orangefs_inode_setxattr(d_inode(dentry),
+ "user.pvfs2.meta_hint",
+ &val, sizeof(val), 0);
+}
+
+/* ORANGEFS2 implementation of VFS inode operations for files */
+static const struct inode_operations orangefs_file_inode_operations = {
+ .get_acl = orangefs_get_acl,
+ .set_acl = orangefs_set_acl,
+ .setattr = orangefs_setattr,
+ .getattr = orangefs_getattr,
+ .listxattr = orangefs_listxattr,
+ .permission = orangefs_permission,
+ .update_time = orangefs_update_time,
+ .fileattr_get = orangefs_fileattr_get,
+ .fileattr_set = orangefs_fileattr_set,
+};
+
+static int orangefs_init_iops(struct inode *inode)
+{
+ inode->i_mapping->a_ops = &orangefs_address_operations;
+
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFREG:
+ inode->i_op = &orangefs_file_inode_operations;
+ inode->i_fop = &orangefs_file_operations;
+ break;
+ case S_IFLNK:
+ inode->i_op = &orangefs_symlink_inode_operations;
+ break;
+ case S_IFDIR:
+ inode->i_op = &orangefs_dir_inode_operations;
+ inode->i_fop = &orangefs_dir_operations;
+ break;
+ default:
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s: unsupported mode\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Given an ORANGEFS object identifier (fsid, handle), convert it into
+ * a ino_t type that will be used as a hash-index from where the handle will
+ * be searched for in the VFS hash table of inodes.
+ */
+static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
+{
+ if (!ref)
+ return 0;
+ return orangefs_khandle_to_ino(&(ref->khandle));
+}
+
+/*
+ * Called to set up an inode from iget5_locked.
+ */
+static int orangefs_set_inode(struct inode *inode, void *data)
+{
+ struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
+ ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
+ ORANGEFS_I(inode)->refn.khandle = ref->khandle;
+ ORANGEFS_I(inode)->attr_valid = 0;
+ hash_init(ORANGEFS_I(inode)->xattr_cache);
+ ORANGEFS_I(inode)->mapping_time = jiffies - 1;
+ ORANGEFS_I(inode)->bitlock = 0;
+ return 0;
+}
+
+/*
+ * Called to determine if handles match.
+ */
+static int orangefs_test_inode(struct inode *inode, void *data)
+{
+ struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
+ struct orangefs_inode_s *orangefs_inode = NULL;
+
+ orangefs_inode = ORANGEFS_I(inode);
+ /* test handles and fs_ids... */
+ return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
+ &(ref->khandle)) &&
+ orangefs_inode->refn.fs_id == ref->fs_id);
+}
+
+/*
+ * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
+ * file handle.
+ *
+ * @sb: the file system super block instance.
+ * @ref: The ORANGEFS object for which we are trying to locate an inode.
+ */
+struct inode *orangefs_iget(struct super_block *sb,
+ struct orangefs_object_kref *ref)
+{
+ struct inode *inode = NULL;
+ unsigned long hash;
+ int error;
+
+ hash = orangefs_handle_hash(ref);
+ inode = iget5_locked(sb,
+ hash,
+ orangefs_test_inode,
+ orangefs_set_inode,
+ ref);
+
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
+ error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
+ if (error) {
+ iget_failed(inode);
+ return ERR_PTR(error);
+ }
+
+ inode->i_ino = hash; /* needed for stat etc */
+ orangefs_init_iops(inode);
+ unlock_new_inode(inode);
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
+ &ref->khandle,
+ ref->fs_id,
+ hash,
+ inode->i_ino);
+
+ return inode;
+}
+
+/*
+ * Allocate an inode for a newly created file and insert it into the inode hash.
+ */
+struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
+ int mode, dev_t dev, struct orangefs_object_kref *ref)
+{
+ unsigned long hash = orangefs_handle_hash(ref);
+ struct inode *inode;
+ int error;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
+ __func__,
+ sb,
+ MAJOR(dev),
+ MINOR(dev),
+ mode);
+
+ inode = new_inode(sb);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ orangefs_set_inode(inode, ref);
+ inode->i_ino = hash; /* needed for stat etc */
+
+ error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
+ if (error)
+ goto out_iput;
+
+ orangefs_init_iops(inode);
+ inode->i_rdev = dev;
+
+ error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
+ if (error < 0)
+ goto out_iput;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "Initializing ACL's for inode %pU\n",
+ get_khandle_from_ino(inode));
+ orangefs_init_acl(inode, dir);
+ return inode;
+
+out_iput:
+ iput(inode);
+ return ERR_PTR(error);
+}
diff --git a/fs/orangefs/namei.c b/fs/orangefs/namei.c
new file mode 100644
index 000000000..600e8eee5
--- /dev/null
+++ b/fs/orangefs/namei.c
@@ -0,0 +1,446 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Linux VFS namei operations.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+
+/*
+ * Get a newly allocated inode to go with a negative dentry.
+ */
+static int orangefs_create(struct user_namespace *mnt_userns,
+ struct inode *dir,
+ struct dentry *dentry,
+ umode_t mode,
+ bool exclusive)
+{
+ struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+ struct orangefs_kernel_op_s *new_op;
+ struct orangefs_object_kref ref;
+ struct inode *inode;
+ struct iattr iattr;
+ int ret;
+
+ gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
+ __func__,
+ dentry);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
+ if (!new_op)
+ return -ENOMEM;
+
+ new_op->upcall.req.create.parent_refn = parent->refn;
+
+ fill_default_sys_attrs(new_op->upcall.req.create.attributes,
+ ORANGEFS_TYPE_METAFILE, mode);
+
+ strncpy(new_op->upcall.req.create.d_name,
+ dentry->d_name.name, ORANGEFS_NAME_MAX - 1);
+
+ ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
+ __func__,
+ dentry,
+ &new_op->downcall.resp.create.refn.khandle,
+ new_op->downcall.resp.create.refn.fs_id,
+ new_op,
+ ret);
+
+ if (ret < 0)
+ goto out;
+
+ ref = new_op->downcall.resp.create.refn;
+
+ inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, &ref);
+ if (IS_ERR(inode)) {
+ gossip_err("%s: Failed to allocate inode for file :%pd:\n",
+ __func__,
+ dentry);
+ ret = PTR_ERR(inode);
+ goto out;
+ }
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: Assigned inode :%pU: for file :%pd:\n",
+ __func__,
+ get_khandle_from_ino(inode),
+ dentry);
+
+ d_instantiate_new(dentry, inode);
+ orangefs_set_timeout(dentry);
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: dentry instantiated for %pd\n",
+ __func__,
+ dentry);
+
+ memset(&iattr, 0, sizeof iattr);
+ iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+ iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+ __orangefs_setattr(dir, &iattr);
+ ret = 0;
+out:
+ op_release(new_op);
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: %pd: returning %d\n",
+ __func__,
+ dentry,
+ ret);
+ return ret;
+}
+
+/*
+ * Attempt to resolve an object name (dentry->d_name), parent handle, and
+ * fsid into a handle for the object.
+ */
+static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags)
+{
+ struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+ struct orangefs_kernel_op_s *new_op;
+ struct inode *inode;
+ int ret = -EINVAL;
+
+ /*
+ * in theory we could skip a lookup here (if the intent is to
+ * create) in order to avoid a potentially failed lookup, but
+ * leaving it in can skip a valid lookup and try to create a file
+ * that already exists (e.g. the vfs already handles checking for
+ * -EEXIST on O_EXCL opens, which is broken if we skip this lookup
+ * in the create path)
+ */
+ gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
+ __func__, dentry);
+
+ if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
+ return ERR_PTR(-ENAMETOOLONG);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
+ if (!new_op)
+ return ERR_PTR(-ENOMEM);
+
+ new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
+
+ gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
+ __FILE__,
+ __func__,
+ __LINE__,
+ &parent->refn.khandle);
+ new_op->upcall.req.lookup.parent_refn = parent->refn;
+
+ strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
+ ORANGEFS_NAME_MAX - 1);
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: doing lookup on %s under %pU,%d\n",
+ __func__,
+ new_op->upcall.req.lookup.d_name,
+ &new_op->upcall.req.lookup.parent_refn.khandle,
+ new_op->upcall.req.lookup.parent_refn.fs_id);
+
+ ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "Lookup Got %pU, fsid %d (ret=%d)\n",
+ &new_op->downcall.resp.lookup.refn.khandle,
+ new_op->downcall.resp.lookup.refn.fs_id,
+ ret);
+
+ if (ret == 0) {
+ orangefs_set_timeout(dentry);
+ inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
+ } else if (ret == -ENOENT) {
+ inode = NULL;
+ } else {
+ /* must be a non-recoverable error */
+ inode = ERR_PTR(ret);
+ }
+
+ op_release(new_op);
+ return d_splice_alias(inode, dentry);
+}
+
+/* return 0 on success; non-zero otherwise */
+static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+ struct orangefs_kernel_op_s *new_op;
+ struct iattr iattr;
+ int ret;
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: called on %pd\n"
+ " (inode %pU): Parent is %pU | fs_id %d\n",
+ __func__,
+ dentry,
+ get_khandle_from_ino(inode),
+ &parent->refn.khandle,
+ parent->refn.fs_id);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
+ if (!new_op)
+ return -ENOMEM;
+
+ new_op->upcall.req.remove.parent_refn = parent->refn;
+ strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
+ ORANGEFS_NAME_MAX - 1);
+
+ ret = service_operation(new_op, "orangefs_unlink",
+ get_interruptible_flag(inode));
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: service_operation returned:%d:\n",
+ __func__,
+ ret);
+
+ op_release(new_op);
+
+ if (!ret) {
+ drop_nlink(inode);
+
+ memset(&iattr, 0, sizeof iattr);
+ iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+ iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+ __orangefs_setattr(dir, &iattr);
+ }
+ return ret;
+}
+
+static int orangefs_symlink(struct user_namespace *mnt_userns,
+ struct inode *dir,
+ struct dentry *dentry,
+ const char *symname)
+{
+ struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+ struct orangefs_kernel_op_s *new_op;
+ struct orangefs_object_kref ref;
+ struct inode *inode;
+ struct iattr iattr;
+ int mode = 0755;
+ int ret;
+
+ gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
+
+ if (!symname)
+ return -EINVAL;
+
+ if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
+ return -ENAMETOOLONG;
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
+ if (!new_op)
+ return -ENOMEM;
+
+ new_op->upcall.req.sym.parent_refn = parent->refn;
+
+ fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
+ ORANGEFS_TYPE_SYMLINK,
+ mode);
+
+ strncpy(new_op->upcall.req.sym.entry_name,
+ dentry->d_name.name,
+ ORANGEFS_NAME_MAX - 1);
+ strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX - 1);
+
+ ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
+ &new_op->downcall.resp.sym.refn.khandle,
+ new_op->downcall.resp.sym.refn.fs_id, ret);
+
+ if (ret < 0) {
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: failed with error code %d\n",
+ __func__, ret);
+ goto out;
+ }
+
+ ref = new_op->downcall.resp.sym.refn;
+
+ inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref);
+ if (IS_ERR(inode)) {
+ gossip_err
+ ("*** Failed to allocate orangefs symlink inode\n");
+ ret = PTR_ERR(inode);
+ goto out;
+ }
+ /*
+ * This is necessary because orangefs_inode_getattr will not
+ * re-read symlink size as it is impossible for it to change.
+ * Invalidating the cache does not help. orangefs_new_inode
+ * does not set the correct size (it does not know symname).
+ */
+ inode->i_size = strlen(symname);
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "Assigned symlink inode new number of %pU\n",
+ get_khandle_from_ino(inode));
+
+ d_instantiate_new(dentry, inode);
+ orangefs_set_timeout(dentry);
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "Inode (Symlink) %pU -> %pd\n",
+ get_khandle_from_ino(inode),
+ dentry);
+
+ memset(&iattr, 0, sizeof iattr);
+ iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+ iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+ __orangefs_setattr(dir, &iattr);
+ ret = 0;
+out:
+ op_release(new_op);
+ return ret;
+}
+
+static int orangefs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, umode_t mode)
+{
+ struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+ struct orangefs_kernel_op_s *new_op;
+ struct orangefs_object_kref ref;
+ struct inode *inode;
+ struct iattr iattr;
+ int ret;
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
+ if (!new_op)
+ return -ENOMEM;
+
+ new_op->upcall.req.mkdir.parent_refn = parent->refn;
+
+ fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
+ ORANGEFS_TYPE_DIRECTORY, mode);
+
+ strncpy(new_op->upcall.req.mkdir.d_name,
+ dentry->d_name.name, ORANGEFS_NAME_MAX - 1);
+
+ ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
+ &new_op->downcall.resp.mkdir.refn.khandle,
+ new_op->downcall.resp.mkdir.refn.fs_id);
+
+ if (ret < 0) {
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "%s: failed with error code %d\n",
+ __func__, ret);
+ goto out;
+ }
+
+ ref = new_op->downcall.resp.mkdir.refn;
+
+ inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, &ref);
+ if (IS_ERR(inode)) {
+ gossip_err("*** Failed to allocate orangefs dir inode\n");
+ ret = PTR_ERR(inode);
+ goto out;
+ }
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "Assigned dir inode new number of %pU\n",
+ get_khandle_from_ino(inode));
+
+ d_instantiate_new(dentry, inode);
+ orangefs_set_timeout(dentry);
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "Inode (Directory) %pU -> %pd\n",
+ get_khandle_from_ino(inode),
+ dentry);
+
+ /*
+ * NOTE: we have no good way to keep nlink consistent for directories
+ * across clients; keep constant at 1.
+ */
+ memset(&iattr, 0, sizeof iattr);
+ iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+ iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+ __orangefs_setattr(dir, &iattr);
+out:
+ op_release(new_op);
+ return ret;
+}
+
+static int orangefs_rename(struct user_namespace *mnt_userns,
+ struct inode *old_dir,
+ struct dentry *old_dentry,
+ struct inode *new_dir,
+ struct dentry *new_dentry,
+ unsigned int flags)
+{
+ struct orangefs_kernel_op_s *new_op;
+ struct iattr iattr;
+ int ret;
+
+ if (flags)
+ return -EINVAL;
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
+ old_dentry, new_dentry, d_count(new_dentry));
+
+ memset(&iattr, 0, sizeof iattr);
+ iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+ iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir);
+ __orangefs_setattr(new_dir, &iattr);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
+ if (!new_op)
+ return -EINVAL;
+
+ new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
+ new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
+
+ strncpy(new_op->upcall.req.rename.d_old_name,
+ old_dentry->d_name.name,
+ ORANGEFS_NAME_MAX - 1);
+ strncpy(new_op->upcall.req.rename.d_new_name,
+ new_dentry->d_name.name,
+ ORANGEFS_NAME_MAX - 1);
+
+ ret = service_operation(new_op,
+ "orangefs_rename",
+ get_interruptible_flag(old_dentry->d_inode));
+
+ gossip_debug(GOSSIP_NAME_DEBUG,
+ "orangefs_rename: got downcall status %d\n",
+ ret);
+
+ if (new_dentry->d_inode)
+ new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode);
+
+ op_release(new_op);
+ return ret;
+}
+
+/* ORANGEFS implementation of VFS inode operations for directories */
+const struct inode_operations orangefs_dir_inode_operations = {
+ .lookup = orangefs_lookup,
+ .get_acl = orangefs_get_acl,
+ .set_acl = orangefs_set_acl,
+ .create = orangefs_create,
+ .unlink = orangefs_unlink,
+ .symlink = orangefs_symlink,
+ .mkdir = orangefs_mkdir,
+ .rmdir = orangefs_unlink,
+ .rename = orangefs_rename,
+ .setattr = orangefs_setattr,
+ .getattr = orangefs_getattr,
+ .listxattr = orangefs_listxattr,
+ .permission = orangefs_permission,
+ .update_time = orangefs_update_time,
+};
diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c
new file mode 100644
index 000000000..b501dc07f
--- /dev/null
+++ b/fs/orangefs/orangefs-bufmap.c
@@ -0,0 +1,549 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+struct slot_map {
+ int c;
+ wait_queue_head_t q;
+ int count;
+ unsigned long *map;
+};
+
+static struct slot_map rw_map = {
+ .c = -1,
+ .q = __WAIT_QUEUE_HEAD_INITIALIZER(rw_map.q)
+};
+static struct slot_map readdir_map = {
+ .c = -1,
+ .q = __WAIT_QUEUE_HEAD_INITIALIZER(readdir_map.q)
+};
+
+
+static void install(struct slot_map *m, int count, unsigned long *map)
+{
+ spin_lock(&m->q.lock);
+ m->c = m->count = count;
+ m->map = map;
+ wake_up_all_locked(&m->q);
+ spin_unlock(&m->q.lock);
+}
+
+static void mark_killed(struct slot_map *m)
+{
+ spin_lock(&m->q.lock);
+ m->c -= m->count + 1;
+ spin_unlock(&m->q.lock);
+}
+
+static void run_down(struct slot_map *m)
+{
+ DEFINE_WAIT(wait);
+ spin_lock(&m->q.lock);
+ if (m->c != -1) {
+ for (;;) {
+ if (likely(list_empty(&wait.entry)))
+ __add_wait_queue_entry_tail(&m->q, &wait);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+
+ if (m->c == -1)
+ break;
+
+ spin_unlock(&m->q.lock);
+ schedule();
+ spin_lock(&m->q.lock);
+ }
+ __remove_wait_queue(&m->q, &wait);
+ __set_current_state(TASK_RUNNING);
+ }
+ m->map = NULL;
+ spin_unlock(&m->q.lock);
+}
+
+static void put(struct slot_map *m, int slot)
+{
+ int v;
+ spin_lock(&m->q.lock);
+ __clear_bit(slot, m->map);
+ v = ++m->c;
+ if (v > 0)
+ wake_up_locked(&m->q);
+ if (unlikely(v == -1)) /* finished dying */
+ wake_up_all_locked(&m->q);
+ spin_unlock(&m->q.lock);
+}
+
+static int wait_for_free(struct slot_map *m)
+{
+ long left = slot_timeout_secs * HZ;
+ DEFINE_WAIT(wait);
+
+ do {
+ long n = left, t;
+ if (likely(list_empty(&wait.entry)))
+ __add_wait_queue_entry_tail_exclusive(&m->q, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ if (m->c > 0)
+ break;
+
+ if (m->c < 0) {
+ /* we are waiting for map to be installed */
+ /* it would better be there soon, or we go away */
+ if (n > ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS * HZ)
+ n = ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS * HZ;
+ }
+ spin_unlock(&m->q.lock);
+ t = schedule_timeout(n);
+ spin_lock(&m->q.lock);
+ if (unlikely(!t) && n != left && m->c < 0)
+ left = t;
+ else
+ left = t + (left - n);
+ if (signal_pending(current))
+ left = -EINTR;
+ } while (left > 0);
+
+ if (!list_empty(&wait.entry))
+ list_del(&wait.entry);
+ else if (left <= 0 && waitqueue_active(&m->q))
+ __wake_up_locked_key(&m->q, TASK_INTERRUPTIBLE, NULL);
+ __set_current_state(TASK_RUNNING);
+
+ if (likely(left > 0))
+ return 0;
+
+ return left < 0 ? -EINTR : -ETIMEDOUT;
+}
+
+static int get(struct slot_map *m)
+{
+ int res = 0;
+ spin_lock(&m->q.lock);
+ if (unlikely(m->c <= 0))
+ res = wait_for_free(m);
+ if (likely(!res)) {
+ m->c--;
+ res = find_first_zero_bit(m->map, m->count);
+ __set_bit(res, m->map);
+ }
+ spin_unlock(&m->q.lock);
+ return res;
+}
+
+/* used to describe mapped buffers */
+struct orangefs_bufmap_desc {
+ void __user *uaddr; /* user space address pointer */
+ struct page **page_array; /* array of mapped pages */
+ int array_count; /* size of above arrays */
+ struct list_head list_link;
+};
+
+static struct orangefs_bufmap {
+ int desc_size;
+ int desc_shift;
+ int desc_count;
+ int total_size;
+ int page_count;
+
+ struct page **page_array;
+ struct orangefs_bufmap_desc *desc_array;
+
+ /* array to track usage of buffer descriptors */
+ unsigned long *buffer_index_array;
+
+ /* array to track usage of buffer descriptors for readdir */
+#define N DIV_ROUND_UP(ORANGEFS_READDIR_DEFAULT_DESC_COUNT, BITS_PER_LONG)
+ unsigned long readdir_index_array[N];
+#undef N
+} *__orangefs_bufmap;
+
+static DEFINE_SPINLOCK(orangefs_bufmap_lock);
+
+static void
+orangefs_bufmap_unmap(struct orangefs_bufmap *bufmap)
+{
+ unpin_user_pages(bufmap->page_array, bufmap->page_count);
+}
+
+static void
+orangefs_bufmap_free(struct orangefs_bufmap *bufmap)
+{
+ kfree(bufmap->page_array);
+ kfree(bufmap->desc_array);
+ bitmap_free(bufmap->buffer_index_array);
+ kfree(bufmap);
+}
+
+/*
+ * XXX: Can the size and shift change while the caller gives up the
+ * XXX: lock between calling this and doing something useful?
+ */
+
+int orangefs_bufmap_size_query(void)
+{
+ struct orangefs_bufmap *bufmap;
+ int size = 0;
+ spin_lock(&orangefs_bufmap_lock);
+ bufmap = __orangefs_bufmap;
+ if (bufmap)
+ size = bufmap->desc_size;
+ spin_unlock(&orangefs_bufmap_lock);
+ return size;
+}
+
+int orangefs_bufmap_shift_query(void)
+{
+ struct orangefs_bufmap *bufmap;
+ int shift = 0;
+ spin_lock(&orangefs_bufmap_lock);
+ bufmap = __orangefs_bufmap;
+ if (bufmap)
+ shift = bufmap->desc_shift;
+ spin_unlock(&orangefs_bufmap_lock);
+ return shift;
+}
+
+static DECLARE_WAIT_QUEUE_HEAD(bufmap_waitq);
+static DECLARE_WAIT_QUEUE_HEAD(readdir_waitq);
+
+static struct orangefs_bufmap *
+orangefs_bufmap_alloc(struct ORANGEFS_dev_map_desc *user_desc)
+{
+ struct orangefs_bufmap *bufmap;
+
+ bufmap = kzalloc(sizeof(*bufmap), GFP_KERNEL);
+ if (!bufmap)
+ goto out;
+
+ bufmap->total_size = user_desc->total_size;
+ bufmap->desc_count = user_desc->count;
+ bufmap->desc_size = user_desc->size;
+ bufmap->desc_shift = ilog2(bufmap->desc_size);
+
+ bufmap->buffer_index_array = bitmap_zalloc(bufmap->desc_count, GFP_KERNEL);
+ if (!bufmap->buffer_index_array)
+ goto out_free_bufmap;
+
+ bufmap->desc_array =
+ kcalloc(bufmap->desc_count, sizeof(struct orangefs_bufmap_desc),
+ GFP_KERNEL);
+ if (!bufmap->desc_array)
+ goto out_free_index_array;
+
+ bufmap->page_count = bufmap->total_size / PAGE_SIZE;
+
+ /* allocate storage to track our page mappings */
+ bufmap->page_array =
+ kcalloc(bufmap->page_count, sizeof(struct page *), GFP_KERNEL);
+ if (!bufmap->page_array)
+ goto out_free_desc_array;
+
+ return bufmap;
+
+out_free_desc_array:
+ kfree(bufmap->desc_array);
+out_free_index_array:
+ bitmap_free(bufmap->buffer_index_array);
+out_free_bufmap:
+ kfree(bufmap);
+out:
+ return NULL;
+}
+
+static int
+orangefs_bufmap_map(struct orangefs_bufmap *bufmap,
+ struct ORANGEFS_dev_map_desc *user_desc)
+{
+ int pages_per_desc = bufmap->desc_size / PAGE_SIZE;
+ int offset = 0, ret, i;
+
+ /* map the pages */
+ ret = pin_user_pages_fast((unsigned long)user_desc->ptr,
+ bufmap->page_count, FOLL_WRITE, bufmap->page_array);
+
+ if (ret < 0)
+ return ret;
+
+ if (ret != bufmap->page_count) {
+ gossip_err("orangefs error: asked for %d pages, only got %d.\n",
+ bufmap->page_count, ret);
+
+ for (i = 0; i < ret; i++) {
+ SetPageError(bufmap->page_array[i]);
+ unpin_user_page(bufmap->page_array[i]);
+ }
+ return -ENOMEM;
+ }
+
+ /*
+ * ideally we want to get kernel space pointers for each page, but
+ * we can't kmap that many pages at once if highmem is being used.
+ * so instead, we just kmap/kunmap the page address each time the
+ * kaddr is needed.
+ */
+ for (i = 0; i < bufmap->page_count; i++)
+ flush_dcache_page(bufmap->page_array[i]);
+
+ /* build a list of available descriptors */
+ for (offset = 0, i = 0; i < bufmap->desc_count; i++) {
+ bufmap->desc_array[i].page_array = &bufmap->page_array[offset];
+ bufmap->desc_array[i].array_count = pages_per_desc;
+ bufmap->desc_array[i].uaddr =
+ (user_desc->ptr + (i * pages_per_desc * PAGE_SIZE));
+ offset += pages_per_desc;
+ }
+
+ return 0;
+}
+
+/*
+ * orangefs_bufmap_initialize()
+ *
+ * initializes the mapped buffer interface
+ *
+ * returns 0 on success, -errno on failure
+ */
+int orangefs_bufmap_initialize(struct ORANGEFS_dev_map_desc *user_desc)
+{
+ struct orangefs_bufmap *bufmap;
+ int ret = -EINVAL;
+
+ gossip_debug(GOSSIP_BUFMAP_DEBUG,
+ "orangefs_bufmap_initialize: called (ptr ("
+ "%p) sz (%d) cnt(%d).\n",
+ user_desc->ptr,
+ user_desc->size,
+ user_desc->count);
+
+ if (user_desc->total_size < 0 ||
+ user_desc->size < 0 ||
+ user_desc->count < 0)
+ goto out;
+
+ /*
+ * sanity check alignment and size of buffer that caller wants to
+ * work with
+ */
+ if (PAGE_ALIGN((unsigned long)user_desc->ptr) !=
+ (unsigned long)user_desc->ptr) {
+ gossip_err("orangefs error: memory alignment (front). %p\n",
+ user_desc->ptr);
+ goto out;
+ }
+
+ if (PAGE_ALIGN(((unsigned long)user_desc->ptr + user_desc->total_size))
+ != (unsigned long)(user_desc->ptr + user_desc->total_size)) {
+ gossip_err("orangefs error: memory alignment (back).(%p + %d)\n",
+ user_desc->ptr,
+ user_desc->total_size);
+ goto out;
+ }
+
+ if (user_desc->total_size != (user_desc->size * user_desc->count)) {
+ gossip_err("orangefs error: user provided an oddly sized buffer: (%d, %d, %d)\n",
+ user_desc->total_size,
+ user_desc->size,
+ user_desc->count);
+ goto out;
+ }
+
+ if ((user_desc->size % PAGE_SIZE) != 0) {
+ gossip_err("orangefs error: bufmap size not page size divisible (%d).\n",
+ user_desc->size);
+ goto out;
+ }
+
+ ret = -ENOMEM;
+ bufmap = orangefs_bufmap_alloc(user_desc);
+ if (!bufmap)
+ goto out;
+
+ ret = orangefs_bufmap_map(bufmap, user_desc);
+ if (ret)
+ goto out_free_bufmap;
+
+
+ spin_lock(&orangefs_bufmap_lock);
+ if (__orangefs_bufmap) {
+ spin_unlock(&orangefs_bufmap_lock);
+ gossip_err("orangefs: error: bufmap already initialized.\n");
+ ret = -EINVAL;
+ goto out_unmap_bufmap;
+ }
+ __orangefs_bufmap = bufmap;
+ install(&rw_map,
+ bufmap->desc_count,
+ bufmap->buffer_index_array);
+ install(&readdir_map,
+ ORANGEFS_READDIR_DEFAULT_DESC_COUNT,
+ bufmap->readdir_index_array);
+ spin_unlock(&orangefs_bufmap_lock);
+
+ gossip_debug(GOSSIP_BUFMAP_DEBUG,
+ "orangefs_bufmap_initialize: exiting normally\n");
+ return 0;
+
+out_unmap_bufmap:
+ orangefs_bufmap_unmap(bufmap);
+out_free_bufmap:
+ orangefs_bufmap_free(bufmap);
+out:
+ return ret;
+}
+
+/*
+ * orangefs_bufmap_finalize()
+ *
+ * shuts down the mapped buffer interface and releases any resources
+ * associated with it
+ *
+ * no return value
+ */
+void orangefs_bufmap_finalize(void)
+{
+ struct orangefs_bufmap *bufmap = __orangefs_bufmap;
+ if (!bufmap)
+ return;
+ gossip_debug(GOSSIP_BUFMAP_DEBUG, "orangefs_bufmap_finalize: called\n");
+ mark_killed(&rw_map);
+ mark_killed(&readdir_map);
+ gossip_debug(GOSSIP_BUFMAP_DEBUG,
+ "orangefs_bufmap_finalize: exiting normally\n");
+}
+
+void orangefs_bufmap_run_down(void)
+{
+ struct orangefs_bufmap *bufmap = __orangefs_bufmap;
+ if (!bufmap)
+ return;
+ run_down(&rw_map);
+ run_down(&readdir_map);
+ spin_lock(&orangefs_bufmap_lock);
+ __orangefs_bufmap = NULL;
+ spin_unlock(&orangefs_bufmap_lock);
+ orangefs_bufmap_unmap(bufmap);
+ orangefs_bufmap_free(bufmap);
+}
+
+/*
+ * orangefs_bufmap_get()
+ *
+ * gets a free mapped buffer descriptor, will sleep until one becomes
+ * available if necessary
+ *
+ * returns slot on success, -errno on failure
+ */
+int orangefs_bufmap_get(void)
+{
+ return get(&rw_map);
+}
+
+/*
+ * orangefs_bufmap_put()
+ *
+ * returns a mapped buffer descriptor to the collection
+ *
+ * no return value
+ */
+void orangefs_bufmap_put(int buffer_index)
+{
+ put(&rw_map, buffer_index);
+}
+
+/*
+ * orangefs_readdir_index_get()
+ *
+ * gets a free descriptor, will sleep until one becomes
+ * available if necessary.
+ * Although the readdir buffers are not mapped into kernel space
+ * we could do that at a later point of time. Regardless, these
+ * indices are used by the client-core.
+ *
+ * returns slot on success, -errno on failure
+ */
+int orangefs_readdir_index_get(void)
+{
+ return get(&readdir_map);
+}
+
+void orangefs_readdir_index_put(int buffer_index)
+{
+ put(&readdir_map, buffer_index);
+}
+
+/*
+ * we've been handed an iovec, we need to copy it to
+ * the shared memory descriptor at "buffer_index".
+ */
+int orangefs_bufmap_copy_from_iovec(struct iov_iter *iter,
+ int buffer_index,
+ size_t size)
+{
+ struct orangefs_bufmap_desc *to;
+ int i;
+
+ gossip_debug(GOSSIP_BUFMAP_DEBUG,
+ "%s: buffer_index:%d: size:%zu:\n",
+ __func__, buffer_index, size);
+
+ to = &__orangefs_bufmap->desc_array[buffer_index];
+ for (i = 0; size; i++) {
+ struct page *page = to->page_array[i];
+ size_t n = size;
+ if (n > PAGE_SIZE)
+ n = PAGE_SIZE;
+ if (copy_page_from_iter(page, 0, n, iter) != n)
+ return -EFAULT;
+ size -= n;
+ }
+ return 0;
+}
+
+/*
+ * we've been handed an iovec, we need to fill it from
+ * the shared memory descriptor at "buffer_index".
+ */
+int orangefs_bufmap_copy_to_iovec(struct iov_iter *iter,
+ int buffer_index,
+ size_t size)
+{
+ struct orangefs_bufmap_desc *from;
+ int i;
+
+ from = &__orangefs_bufmap->desc_array[buffer_index];
+ gossip_debug(GOSSIP_BUFMAP_DEBUG,
+ "%s: buffer_index:%d: size:%zu:\n",
+ __func__, buffer_index, size);
+
+
+ for (i = 0; size; i++) {
+ struct page *page = from->page_array[i];
+ size_t n = size;
+ if (n > PAGE_SIZE)
+ n = PAGE_SIZE;
+ n = copy_page_to_iter(page, 0, n, iter);
+ if (!n)
+ return -EFAULT;
+ size -= n;
+ }
+ return 0;
+}
+
+void orangefs_bufmap_page_fill(void *page_to,
+ int buffer_index,
+ int slot_index)
+{
+ struct orangefs_bufmap_desc *from;
+ void *page_from;
+
+ from = &__orangefs_bufmap->desc_array[buffer_index];
+ page_from = kmap_atomic(from->page_array[slot_index]);
+ memcpy(page_to, page_from, PAGE_SIZE);
+ kunmap_atomic(page_from);
+}
diff --git a/fs/orangefs/orangefs-bufmap.h b/fs/orangefs/orangefs-bufmap.h
new file mode 100644
index 000000000..75b2d2833
--- /dev/null
+++ b/fs/orangefs/orangefs-bufmap.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#ifndef __ORANGEFS_BUFMAP_H
+#define __ORANGEFS_BUFMAP_H
+
+int orangefs_bufmap_size_query(void);
+
+int orangefs_bufmap_shift_query(void);
+
+int orangefs_bufmap_initialize(struct ORANGEFS_dev_map_desc *user_desc);
+
+void orangefs_bufmap_finalize(void);
+
+void orangefs_bufmap_run_down(void);
+
+int orangefs_bufmap_get(void);
+
+void orangefs_bufmap_put(int buffer_index);
+
+int orangefs_readdir_index_get(void);
+
+void orangefs_readdir_index_put(int buffer_index);
+
+int orangefs_bufmap_copy_from_iovec(struct iov_iter *iter,
+ int buffer_index,
+ size_t size);
+
+int orangefs_bufmap_copy_to_iovec(struct iov_iter *iter,
+ int buffer_index,
+ size_t size);
+
+void orangefs_bufmap_page_fill(void *kaddr, int buffer_index, int slot_index);
+
+#endif /* __ORANGEFS_BUFMAP_H */
diff --git a/fs/orangefs/orangefs-cache.c b/fs/orangefs/orangefs-cache.c
new file mode 100644
index 000000000..3b6982bf6
--- /dev/null
+++ b/fs/orangefs/orangefs-cache.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+
+/* tags assigned to kernel upcall operations */
+static __u64 next_tag_value;
+static DEFINE_SPINLOCK(next_tag_value_lock);
+
+/* the orangefs memory caches */
+
+/* a cache for orangefs upcall/downcall operations */
+static struct kmem_cache *op_cache;
+
+int op_cache_initialize(void)
+{
+ op_cache = kmem_cache_create("orangefs_op_cache",
+ sizeof(struct orangefs_kernel_op_s),
+ 0,
+ ORANGEFS_CACHE_CREATE_FLAGS,
+ NULL);
+
+ if (!op_cache) {
+ gossip_err("Cannot create orangefs_op_cache\n");
+ return -ENOMEM;
+ }
+
+ /* initialize our atomic tag counter */
+ spin_lock(&next_tag_value_lock);
+ next_tag_value = 100;
+ spin_unlock(&next_tag_value_lock);
+ return 0;
+}
+
+int op_cache_finalize(void)
+{
+ kmem_cache_destroy(op_cache);
+ return 0;
+}
+
+char *get_opname_string(struct orangefs_kernel_op_s *new_op)
+{
+ if (new_op) {
+ __s32 type = new_op->upcall.type;
+
+ if (type == ORANGEFS_VFS_OP_FILE_IO)
+ return "OP_FILE_IO";
+ else if (type == ORANGEFS_VFS_OP_LOOKUP)
+ return "OP_LOOKUP";
+ else if (type == ORANGEFS_VFS_OP_CREATE)
+ return "OP_CREATE";
+ else if (type == ORANGEFS_VFS_OP_GETATTR)
+ return "OP_GETATTR";
+ else if (type == ORANGEFS_VFS_OP_REMOVE)
+ return "OP_REMOVE";
+ else if (type == ORANGEFS_VFS_OP_MKDIR)
+ return "OP_MKDIR";
+ else if (type == ORANGEFS_VFS_OP_READDIR)
+ return "OP_READDIR";
+ else if (type == ORANGEFS_VFS_OP_READDIRPLUS)
+ return "OP_READDIRPLUS";
+ else if (type == ORANGEFS_VFS_OP_SETATTR)
+ return "OP_SETATTR";
+ else if (type == ORANGEFS_VFS_OP_SYMLINK)
+ return "OP_SYMLINK";
+ else if (type == ORANGEFS_VFS_OP_RENAME)
+ return "OP_RENAME";
+ else if (type == ORANGEFS_VFS_OP_STATFS)
+ return "OP_STATFS";
+ else if (type == ORANGEFS_VFS_OP_TRUNCATE)
+ return "OP_TRUNCATE";
+ else if (type == ORANGEFS_VFS_OP_RA_FLUSH)
+ return "OP_RA_FLUSH";
+ else if (type == ORANGEFS_VFS_OP_FS_MOUNT)
+ return "OP_FS_MOUNT";
+ else if (type == ORANGEFS_VFS_OP_FS_UMOUNT)
+ return "OP_FS_UMOUNT";
+ else if (type == ORANGEFS_VFS_OP_GETXATTR)
+ return "OP_GETXATTR";
+ else if (type == ORANGEFS_VFS_OP_SETXATTR)
+ return "OP_SETXATTR";
+ else if (type == ORANGEFS_VFS_OP_LISTXATTR)
+ return "OP_LISTXATTR";
+ else if (type == ORANGEFS_VFS_OP_REMOVEXATTR)
+ return "OP_REMOVEXATTR";
+ else if (type == ORANGEFS_VFS_OP_PARAM)
+ return "OP_PARAM";
+ else if (type == ORANGEFS_VFS_OP_PERF_COUNT)
+ return "OP_PERF_COUNT";
+ else if (type == ORANGEFS_VFS_OP_CANCEL)
+ return "OP_CANCEL";
+ else if (type == ORANGEFS_VFS_OP_FSYNC)
+ return "OP_FSYNC";
+ else if (type == ORANGEFS_VFS_OP_FSKEY)
+ return "OP_FSKEY";
+ else if (type == ORANGEFS_VFS_OP_FEATURES)
+ return "OP_FEATURES";
+ }
+ return "OP_UNKNOWN?";
+}
+
+void orangefs_new_tag(struct orangefs_kernel_op_s *op)
+{
+ spin_lock(&next_tag_value_lock);
+ op->tag = next_tag_value++;
+ if (next_tag_value == 0)
+ next_tag_value = 100;
+ spin_unlock(&next_tag_value_lock);
+}
+
+struct orangefs_kernel_op_s *op_alloc(__s32 type)
+{
+ struct orangefs_kernel_op_s *new_op = NULL;
+
+ new_op = kmem_cache_zalloc(op_cache, GFP_KERNEL);
+ if (new_op) {
+ INIT_LIST_HEAD(&new_op->list);
+ spin_lock_init(&new_op->lock);
+ init_completion(&new_op->waitq);
+
+ new_op->upcall.type = ORANGEFS_VFS_OP_INVALID;
+ new_op->downcall.type = ORANGEFS_VFS_OP_INVALID;
+ new_op->downcall.status = -1;
+
+ new_op->op_state = OP_VFS_STATE_UNKNOWN;
+
+ /* initialize the op specific tag and upcall credentials */
+ orangefs_new_tag(new_op);
+ new_op->upcall.type = type;
+ new_op->attempts = 0;
+ gossip_debug(GOSSIP_CACHE_DEBUG,
+ "Alloced OP (%p: %llu %s)\n",
+ new_op,
+ llu(new_op->tag),
+ get_opname_string(new_op));
+
+ new_op->upcall.uid = from_kuid(&init_user_ns,
+ current_fsuid());
+
+ new_op->upcall.gid = from_kgid(&init_user_ns,
+ current_fsgid());
+ } else {
+ gossip_err("op_alloc: kmem_cache_zalloc failed!\n");
+ }
+ return new_op;
+}
+
+void op_release(struct orangefs_kernel_op_s *orangefs_op)
+{
+ if (orangefs_op) {
+ gossip_debug(GOSSIP_CACHE_DEBUG,
+ "Releasing OP (%p: %llu)\n",
+ orangefs_op,
+ llu(orangefs_op->tag));
+ kmem_cache_free(op_cache, orangefs_op);
+ } else {
+ gossip_err("NULL pointer in op_release\n");
+ }
+}
diff --git a/fs/orangefs/orangefs-debug.h b/fs/orangefs/orangefs-debug.h
new file mode 100644
index 000000000..6e079d423
--- /dev/null
+++ b/fs/orangefs/orangefs-debug.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/* This file just defines debugging masks to be used with the gossip
+ * logging utility. All debugging masks for ORANGEFS are kept here to make
+ * sure we don't have collisions.
+ */
+
+#ifndef __ORANGEFS_DEBUG_H
+#define __ORANGEFS_DEBUG_H
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#include <linux/kernel.h>
+#else
+#include <stdint.h>
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+#endif
+
+#define GOSSIP_NO_DEBUG (__u64)0
+
+#define GOSSIP_SUPER_DEBUG ((__u64)1 << 0)
+#define GOSSIP_INODE_DEBUG ((__u64)1 << 1)
+#define GOSSIP_FILE_DEBUG ((__u64)1 << 2)
+#define GOSSIP_DIR_DEBUG ((__u64)1 << 3)
+#define GOSSIP_UTILS_DEBUG ((__u64)1 << 4)
+#define GOSSIP_WAIT_DEBUG ((__u64)1 << 5)
+#define GOSSIP_ACL_DEBUG ((__u64)1 << 6)
+#define GOSSIP_DCACHE_DEBUG ((__u64)1 << 7)
+#define GOSSIP_DEV_DEBUG ((__u64)1 << 8)
+#define GOSSIP_NAME_DEBUG ((__u64)1 << 9)
+#define GOSSIP_BUFMAP_DEBUG ((__u64)1 << 10)
+#define GOSSIP_CACHE_DEBUG ((__u64)1 << 11)
+#define GOSSIP_DEBUGFS_DEBUG ((__u64)1 << 12)
+#define GOSSIP_XATTR_DEBUG ((__u64)1 << 13)
+#define GOSSIP_INIT_DEBUG ((__u64)1 << 14)
+#define GOSSIP_SYSFS_DEBUG ((__u64)1 << 15)
+
+#define GOSSIP_MAX_NR 16
+#define GOSSIP_MAX_DEBUG (((__u64)1 << GOSSIP_MAX_NR) - 1)
+
+/* a private internal type */
+struct __keyword_mask_s {
+ const char *keyword;
+ __u64 mask_val;
+};
+
+/*
+ * Map all kmod keywords to kmod debug masks here. Keep this
+ * structure "packed":
+ *
+ * "all" is always last...
+ *
+ * keyword mask_val index
+ * foo 1 0
+ * bar 2 1
+ * baz 4 2
+ * qux 8 3
+ * . . .
+ */
+static struct __keyword_mask_s s_kmod_keyword_mask_map[] = {
+ {"super", GOSSIP_SUPER_DEBUG},
+ {"inode", GOSSIP_INODE_DEBUG},
+ {"file", GOSSIP_FILE_DEBUG},
+ {"dir", GOSSIP_DIR_DEBUG},
+ {"utils", GOSSIP_UTILS_DEBUG},
+ {"wait", GOSSIP_WAIT_DEBUG},
+ {"acl", GOSSIP_ACL_DEBUG},
+ {"dcache", GOSSIP_DCACHE_DEBUG},
+ {"dev", GOSSIP_DEV_DEBUG},
+ {"name", GOSSIP_NAME_DEBUG},
+ {"bufmap", GOSSIP_BUFMAP_DEBUG},
+ {"cache", GOSSIP_CACHE_DEBUG},
+ {"debugfs", GOSSIP_DEBUGFS_DEBUG},
+ {"xattr", GOSSIP_XATTR_DEBUG},
+ {"init", GOSSIP_INIT_DEBUG},
+ {"sysfs", GOSSIP_SYSFS_DEBUG},
+ {"none", GOSSIP_NO_DEBUG},
+ {"all", GOSSIP_MAX_DEBUG}
+};
+
+static const int num_kmod_keyword_mask_map = (int)
+ (ARRAY_SIZE(s_kmod_keyword_mask_map));
+
+#endif /* __ORANGEFS_DEBUG_H */
diff --git a/fs/orangefs/orangefs-debugfs.c b/fs/orangefs/orangefs-debugfs.c
new file mode 100644
index 000000000..1b508f543
--- /dev/null
+++ b/fs/orangefs/orangefs-debugfs.c
@@ -0,0 +1,1010 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * What: /sys/kernel/debug/orangefs/debug-help
+ * Date: June 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * List of client and kernel debug keywords.
+ *
+ *
+ * What: /sys/kernel/debug/orangefs/client-debug
+ * Date: June 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * Debug setting for "the client", the userspace
+ * helper for the kernel module.
+ *
+ *
+ * What: /sys/kernel/debug/orangefs/kernel-debug
+ * Date: June 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * Debug setting for the orangefs kernel module.
+ *
+ * Any of the keywords, or comma-separated lists
+ * of keywords, from debug-help can be catted to
+ * client-debug or kernel-debug.
+ *
+ * "none", "all" and "verbose" are special keywords
+ * for client-debug. Setting client-debug to "all"
+ * is kind of like trying to drink water from a
+ * fire hose, "verbose" triggers most of the same
+ * output except for the constant flow of output
+ * from the main wait loop.
+ *
+ * "none" and "all" are similar settings for kernel-debug
+ * no need for a "verbose".
+ */
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+
+#include <linux/uaccess.h>
+
+#include "orangefs-debugfs.h"
+#include "protocol.h"
+#include "orangefs-kernel.h"
+
+#define DEBUG_HELP_STRING_SIZE 4096
+#define HELP_STRING_UNINITIALIZED \
+ "Client Debug Keywords are unknown until the first time\n" \
+ "the client is started after boot.\n"
+#define ORANGEFS_KMOD_DEBUG_HELP_FILE "debug-help"
+#define ORANGEFS_KMOD_DEBUG_FILE "kernel-debug"
+#define ORANGEFS_CLIENT_DEBUG_FILE "client-debug"
+#define ORANGEFS_VERBOSE "verbose"
+#define ORANGEFS_ALL "all"
+
+/*
+ * An array of client_debug_mask will be built to hold debug keyword/mask
+ * values fetched from userspace.
+ */
+struct client_debug_mask {
+ char *keyword;
+ __u64 mask1;
+ __u64 mask2;
+};
+
+static void orangefs_kernel_debug_init(void);
+
+static int orangefs_debug_help_open(struct inode *, struct file *);
+static void *help_start(struct seq_file *, loff_t *);
+static void *help_next(struct seq_file *, void *, loff_t *);
+static void help_stop(struct seq_file *, void *);
+static int help_show(struct seq_file *, void *);
+
+static int orangefs_debug_open(struct inode *, struct file *);
+
+static ssize_t orangefs_debug_read(struct file *,
+ char __user *,
+ size_t,
+ loff_t *);
+
+static ssize_t orangefs_debug_write(struct file *,
+ const char __user *,
+ size_t,
+ loff_t *);
+
+static int orangefs_prepare_cdm_array(char *);
+static void debug_mask_to_string(void *, int);
+static void do_k_string(void *, int);
+static void do_c_string(void *, int);
+static int keyword_is_amalgam(char *);
+static int check_amalgam_keyword(void *, int);
+static void debug_string_to_mask(char *, void *, int);
+static void do_c_mask(int, char *, struct client_debug_mask **);
+static void do_k_mask(int, char *, __u64 **);
+
+static char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN] = "none";
+static char *debug_help_string;
+static char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
+static char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
+
+static struct dentry *client_debug_dentry;
+static struct dentry *debug_dir;
+
+static unsigned int kernel_mask_set_mod_init;
+static int orangefs_debug_disabled = 1;
+static int help_string_initialized;
+
+static const struct seq_operations help_debug_ops = {
+ .start = help_start,
+ .next = help_next,
+ .stop = help_stop,
+ .show = help_show,
+};
+
+static const struct file_operations debug_help_fops = {
+ .owner = THIS_MODULE,
+ .open = orangefs_debug_help_open,
+ .read = seq_read,
+ .release = seq_release,
+ .llseek = seq_lseek,
+};
+
+static const struct file_operations kernel_debug_fops = {
+ .owner = THIS_MODULE,
+ .open = orangefs_debug_open,
+ .read = orangefs_debug_read,
+ .write = orangefs_debug_write,
+ .llseek = generic_file_llseek,
+};
+
+static int client_all_index;
+static int client_verbose_index;
+
+static struct client_debug_mask *cdm_array;
+static int cdm_element_count;
+
+static struct client_debug_mask client_debug_mask;
+
+/*
+ * Used to protect data in ORANGEFS_KMOD_DEBUG_FILE and
+ * ORANGEFS_KMOD_DEBUG_FILE.
+ */
+static DEFINE_MUTEX(orangefs_debug_lock);
+
+/* Used to protect data in ORANGEFS_KMOD_DEBUG_HELP_FILE */
+static DEFINE_MUTEX(orangefs_help_file_lock);
+
+/*
+ * initialize kmod debug operations, create orangefs debugfs dir and
+ * ORANGEFS_KMOD_DEBUG_HELP_FILE.
+ */
+void orangefs_debugfs_init(int debug_mask)
+{
+ /* convert input debug mask to a 64-bit unsigned integer */
+ orangefs_gossip_debug_mask = (unsigned long long)debug_mask;
+
+ /*
+ * set the kernel's gossip debug string; invalid mask values will
+ * be ignored.
+ */
+ debug_mask_to_string(&orangefs_gossip_debug_mask, 0);
+
+ /* remove any invalid values from the mask */
+ debug_string_to_mask(kernel_debug_string, &orangefs_gossip_debug_mask,
+ 0);
+
+ /*
+ * if the mask has a non-zero value, then indicate that the mask
+ * was set when the kernel module was loaded. The orangefs dev ioctl
+ * command will look at this boolean to determine if the kernel's
+ * debug mask should be overwritten when the client-core is started.
+ */
+ if (orangefs_gossip_debug_mask != 0)
+ kernel_mask_set_mod_init = true;
+
+ pr_info("%s: called with debug mask: :%s: :%llx:\n",
+ __func__,
+ kernel_debug_string,
+ (unsigned long long)orangefs_gossip_debug_mask);
+
+ debug_dir = debugfs_create_dir("orangefs", NULL);
+
+ debugfs_create_file(ORANGEFS_KMOD_DEBUG_HELP_FILE, 0444, debug_dir,
+ debug_help_string, &debug_help_fops);
+
+ orangefs_debug_disabled = 0;
+
+ orangefs_kernel_debug_init();
+}
+
+/*
+ * initialize the kernel-debug file.
+ */
+static void orangefs_kernel_debug_init(void)
+{
+ static char k_buffer[ORANGEFS_MAX_DEBUG_STRING_LEN] = { };
+
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__);
+
+ if (strlen(kernel_debug_string) + 1 < ORANGEFS_MAX_DEBUG_STRING_LEN) {
+ strcpy(k_buffer, kernel_debug_string);
+ strcat(k_buffer, "\n");
+ } else {
+ strcpy(k_buffer, "none\n");
+ pr_info("%s: overflow 1!\n", __func__);
+ }
+
+ debugfs_create_file(ORANGEFS_KMOD_DEBUG_FILE, 0444, debug_dir, k_buffer,
+ &kernel_debug_fops);
+}
+
+
+void orangefs_debugfs_cleanup(void)
+{
+ debugfs_remove_recursive(debug_dir);
+ kfree(debug_help_string);
+ debug_help_string = NULL;
+}
+
+/* open ORANGEFS_KMOD_DEBUG_HELP_FILE */
+static int orangefs_debug_help_open(struct inode *inode, struct file *file)
+{
+ int rc = -ENODEV;
+ int ret;
+
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "orangefs_debug_help_open: start\n");
+
+ if (orangefs_debug_disabled)
+ goto out;
+
+ ret = seq_open(file, &help_debug_ops);
+ if (ret)
+ goto out;
+
+ ((struct seq_file *)(file->private_data))->private = inode->i_private;
+
+ rc = 0;
+
+out:
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "orangefs_debug_help_open: rc:%d:\n",
+ rc);
+ return rc;
+}
+
+/*
+ * I think start always gets called again after stop. Start
+ * needs to return NULL when it is done. The whole "payload"
+ * in this case is a single (long) string, so by the second
+ * time we get to start (pos = 1), we're done.
+ */
+static void *help_start(struct seq_file *m, loff_t *pos)
+{
+ void *payload = NULL;
+
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_start: start\n");
+
+ mutex_lock(&orangefs_help_file_lock);
+
+ if (*pos == 0)
+ payload = m->private;
+
+ return payload;
+}
+
+static void *help_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ (*pos)++;
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_next: start\n");
+
+ return NULL;
+}
+
+static void help_stop(struct seq_file *m, void *p)
+{
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_stop: start\n");
+ mutex_unlock(&orangefs_help_file_lock);
+}
+
+static int help_show(struct seq_file *m, void *v)
+{
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_show: start\n");
+
+ seq_puts(m, v);
+
+ return 0;
+}
+
+/*
+ * initialize the client-debug file.
+ */
+static void orangefs_client_debug_init(void)
+{
+
+ static char c_buffer[ORANGEFS_MAX_DEBUG_STRING_LEN] = { };
+
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__);
+
+ if (strlen(client_debug_string) + 1 < ORANGEFS_MAX_DEBUG_STRING_LEN) {
+ strcpy(c_buffer, client_debug_string);
+ strcat(c_buffer, "\n");
+ } else {
+ strcpy(c_buffer, "none\n");
+ pr_info("%s: overflow! 2\n", __func__);
+ }
+
+ client_debug_dentry = debugfs_create_file(ORANGEFS_CLIENT_DEBUG_FILE,
+ 0444,
+ debug_dir,
+ c_buffer,
+ &kernel_debug_fops);
+}
+
+/* open ORANGEFS_KMOD_DEBUG_FILE or ORANGEFS_CLIENT_DEBUG_FILE.*/
+static int orangefs_debug_open(struct inode *inode, struct file *file)
+{
+ int rc = -ENODEV;
+
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "%s: orangefs_debug_disabled: %d\n",
+ __func__,
+ orangefs_debug_disabled);
+
+ if (orangefs_debug_disabled)
+ goto out;
+
+ rc = 0;
+ mutex_lock(&orangefs_debug_lock);
+ file->private_data = inode->i_private;
+ mutex_unlock(&orangefs_debug_lock);
+
+out:
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "orangefs_debug_open: rc: %d\n",
+ rc);
+ return rc;
+}
+
+static ssize_t orangefs_debug_read(struct file *file,
+ char __user *ubuf,
+ size_t count,
+ loff_t *ppos)
+{
+ char *buf;
+ int sprintf_ret;
+ ssize_t read_ret = -ENOMEM;
+
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG, "orangefs_debug_read: start\n");
+
+ buf = kmalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL);
+ if (!buf)
+ goto out;
+
+ mutex_lock(&orangefs_debug_lock);
+ sprintf_ret = sprintf(buf, "%s", (char *)file->private_data);
+ mutex_unlock(&orangefs_debug_lock);
+
+ read_ret = simple_read_from_buffer(ubuf, count, ppos, buf, sprintf_ret);
+
+ kfree(buf);
+
+out:
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "orangefs_debug_read: ret: %zu\n",
+ read_ret);
+
+ return read_ret;
+}
+
+static ssize_t orangefs_debug_write(struct file *file,
+ const char __user *ubuf,
+ size_t count,
+ loff_t *ppos)
+{
+ char *buf;
+ int rc = -EFAULT;
+ size_t silly = 0;
+ char *debug_string;
+ struct orangefs_kernel_op_s *new_op = NULL;
+ struct client_debug_mask c_mask = { NULL, 0, 0 };
+ char *s;
+
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "orangefs_debug_write: %pD\n",
+ file);
+
+ if (count == 0)
+ return 0;
+
+ /*
+ * Thwart users who try to jamb a ridiculous number
+ * of bytes into the debug file...
+ */
+ if (count > ORANGEFS_MAX_DEBUG_STRING_LEN + 1) {
+ silly = count;
+ count = ORANGEFS_MAX_DEBUG_STRING_LEN + 1;
+ }
+
+ buf = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL);
+ if (!buf)
+ goto out;
+
+ if (copy_from_user(buf, ubuf, count - 1)) {
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "%s: copy_from_user failed!\n",
+ __func__);
+ goto out;
+ }
+
+ /*
+ * Map the keyword string from userspace into a valid debug mask.
+ * The mapping process involves mapping the human-inputted string
+ * into a valid mask, and then rebuilding the string from the
+ * verified valid mask.
+ *
+ * A service operation is required to set a new client-side
+ * debug mask.
+ */
+ if (!strcmp(file->f_path.dentry->d_name.name,
+ ORANGEFS_KMOD_DEBUG_FILE)) {
+ debug_string_to_mask(buf, &orangefs_gossip_debug_mask, 0);
+ debug_mask_to_string(&orangefs_gossip_debug_mask, 0);
+ debug_string = kernel_debug_string;
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "New kernel debug string is %s\n",
+ kernel_debug_string);
+ } else {
+ /* Can't reset client debug mask if client is not running. */
+ if (is_daemon_in_service()) {
+ pr_info("%s: Client not running :%d:\n",
+ __func__,
+ is_daemon_in_service());
+ goto out;
+ }
+
+ debug_string_to_mask(buf, &c_mask, 1);
+ debug_mask_to_string(&c_mask, 1);
+ debug_string = client_debug_string;
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_PARAM);
+ if (!new_op) {
+ pr_info("%s: op_alloc failed!\n", __func__);
+ goto out;
+ }
+
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_TWO_MASK_VALUES;
+ new_op->upcall.req.param.type = ORANGEFS_PARAM_REQUEST_SET;
+ memset(new_op->upcall.req.param.s_value,
+ 0,
+ ORANGEFS_MAX_DEBUG_STRING_LEN);
+ sprintf(new_op->upcall.req.param.s_value,
+ "%llx %llx\n",
+ c_mask.mask1,
+ c_mask.mask2);
+
+ /* service_operation returns 0 on success... */
+ rc = service_operation(new_op,
+ "orangefs_param",
+ ORANGEFS_OP_INTERRUPTIBLE);
+
+ if (rc)
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "%s: service_operation failed! rc:%d:\n",
+ __func__,
+ rc);
+
+ op_release(new_op);
+ }
+
+ mutex_lock(&orangefs_debug_lock);
+ s = file_inode(file)->i_private;
+ memset(s, 0, ORANGEFS_MAX_DEBUG_STRING_LEN);
+ sprintf(s, "%s\n", debug_string);
+ mutex_unlock(&orangefs_debug_lock);
+
+ *ppos += count;
+ if (silly)
+ rc = silly;
+ else
+ rc = count;
+
+out:
+ gossip_debug(GOSSIP_DEBUGFS_DEBUG,
+ "orangefs_debug_write: rc: %d\n",
+ rc);
+ kfree(buf);
+ return rc;
+}
+
+/*
+ * After obtaining a string representation of the client's debug
+ * keywords and their associated masks, this function is called to build an
+ * array of these values.
+ */
+static int orangefs_prepare_cdm_array(char *debug_array_string)
+{
+ int i;
+ int rc = -EINVAL;
+ char *cds_head = NULL;
+ char *cds_delimiter = NULL;
+ int keyword_len = 0;
+
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
+
+ /*
+ * figure out how many elements the cdm_array needs.
+ */
+ for (i = 0; i < strlen(debug_array_string); i++)
+ if (debug_array_string[i] == '\n')
+ cdm_element_count++;
+
+ if (!cdm_element_count) {
+ pr_info("No elements in client debug array string!\n");
+ goto out;
+ }
+
+ cdm_array = kcalloc(cdm_element_count, sizeof(*cdm_array), GFP_KERNEL);
+ if (!cdm_array) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ cds_head = debug_array_string;
+
+ for (i = 0; i < cdm_element_count; i++) {
+ cds_delimiter = strchr(cds_head, '\n');
+ *cds_delimiter = '\0';
+
+ keyword_len = strcspn(cds_head, " ");
+
+ cdm_array[i].keyword = kzalloc(keyword_len + 1, GFP_KERNEL);
+ if (!cdm_array[i].keyword) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ sscanf(cds_head,
+ "%s %llx %llx",
+ cdm_array[i].keyword,
+ (unsigned long long *)&(cdm_array[i].mask1),
+ (unsigned long long *)&(cdm_array[i].mask2));
+
+ if (!strcmp(cdm_array[i].keyword, ORANGEFS_VERBOSE))
+ client_verbose_index = i;
+
+ if (!strcmp(cdm_array[i].keyword, ORANGEFS_ALL))
+ client_all_index = i;
+
+ cds_head = cds_delimiter + 1;
+ }
+
+ rc = cdm_element_count;
+
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: rc:%d:\n", __func__, rc);
+
+out:
+
+ return rc;
+
+}
+
+/*
+ * /sys/kernel/debug/orangefs/debug-help can be catted to
+ * see all the available kernel and client debug keywords.
+ *
+ * When orangefs.ko initializes, we have no idea what keywords the
+ * client supports, nor their associated masks.
+ *
+ * We pass through this function once at module-load and stamp a
+ * boilerplate "we don't know" message for the client in the
+ * debug-help file. We pass through here again when the client
+ * starts and then we can fill out the debug-help file fully.
+ *
+ * The client might be restarted any number of times between
+ * module reloads, we only build the debug-help file the first time.
+ */
+int orangefs_prepare_debugfs_help_string(int at_boot)
+{
+ char *client_title = "Client Debug Keywords:\n";
+ char *kernel_title = "Kernel Debug Keywords:\n";
+ size_t string_size = DEBUG_HELP_STRING_SIZE;
+ size_t result_size;
+ size_t i;
+ char *new;
+ int rc = -EINVAL;
+
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
+
+ if (at_boot)
+ client_title = HELP_STRING_UNINITIALIZED;
+
+ /* build a new debug_help_string. */
+ new = kzalloc(DEBUG_HELP_STRING_SIZE, GFP_KERNEL);
+ if (!new) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /*
+ * strlcat(dst, src, size) will append at most
+ * "size - strlen(dst) - 1" bytes of src onto dst,
+ * null terminating the result, and return the total
+ * length of the string it tried to create.
+ *
+ * We'll just plow through here building our new debug
+ * help string and let strlcat take care of assuring that
+ * dst doesn't overflow.
+ */
+ strlcat(new, client_title, string_size);
+
+ if (!at_boot) {
+
+ /*
+ * fill the client keyword/mask array and remember
+ * how many elements there were.
+ */
+ cdm_element_count =
+ orangefs_prepare_cdm_array(client_debug_array_string);
+ if (cdm_element_count <= 0) {
+ kfree(new);
+ goto out;
+ }
+
+ for (i = 0; i < cdm_element_count; i++) {
+ strlcat(new, "\t", string_size);
+ strlcat(new, cdm_array[i].keyword, string_size);
+ strlcat(new, "\n", string_size);
+ }
+ }
+
+ strlcat(new, "\n", string_size);
+ strlcat(new, kernel_title, string_size);
+
+ for (i = 0; i < num_kmod_keyword_mask_map; i++) {
+ strlcat(new, "\t", string_size);
+ strlcat(new, s_kmod_keyword_mask_map[i].keyword, string_size);
+ result_size = strlcat(new, "\n", string_size);
+ }
+
+ /* See if we tried to put too many bytes into "new"... */
+ if (result_size >= string_size) {
+ kfree(new);
+ goto out;
+ }
+
+ if (at_boot) {
+ debug_help_string = new;
+ } else {
+ mutex_lock(&orangefs_help_file_lock);
+ memset(debug_help_string, 0, DEBUG_HELP_STRING_SIZE);
+ strlcat(debug_help_string, new, string_size);
+ mutex_unlock(&orangefs_help_file_lock);
+ kfree(new);
+ }
+
+ rc = 0;
+
+out: return rc;
+
+}
+
+/*
+ * kernel = type 0
+ * client = type 1
+ */
+static void debug_mask_to_string(void *mask, int type)
+{
+ int i;
+ int len = 0;
+ char *debug_string;
+ int element_count = 0;
+
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
+
+ if (type) {
+ debug_string = client_debug_string;
+ element_count = cdm_element_count;
+ } else {
+ debug_string = kernel_debug_string;
+ element_count = num_kmod_keyword_mask_map;
+ }
+
+ memset(debug_string, 0, ORANGEFS_MAX_DEBUG_STRING_LEN);
+
+ /*
+ * Some keywords, like "all" or "verbose", are amalgams of
+ * numerous other keywords. Make a special check for those
+ * before grinding through the whole mask only to find out
+ * later...
+ */
+ if (check_amalgam_keyword(mask, type))
+ goto out;
+
+ /* Build the debug string. */
+ for (i = 0; i < element_count; i++)
+ if (type)
+ do_c_string(mask, i);
+ else
+ do_k_string(mask, i);
+
+ len = strlen(debug_string);
+
+ if ((len) && (type))
+ client_debug_string[len - 1] = '\0';
+ else if (len)
+ kernel_debug_string[len - 1] = '\0';
+ else if (type)
+ strcpy(client_debug_string, "none");
+ else
+ strcpy(kernel_debug_string, "none");
+
+out:
+gossip_debug(GOSSIP_UTILS_DEBUG, "%s: string:%s:\n", __func__, debug_string);
+
+ return;
+
+}
+
+static void do_k_string(void *k_mask, int index)
+{
+ __u64 *mask = (__u64 *) k_mask;
+
+ if (keyword_is_amalgam((char *) s_kmod_keyword_mask_map[index].keyword))
+ goto out;
+
+ if (*mask & s_kmod_keyword_mask_map[index].mask_val) {
+ if ((strlen(kernel_debug_string) +
+ strlen(s_kmod_keyword_mask_map[index].keyword))
+ < ORANGEFS_MAX_DEBUG_STRING_LEN - 1) {
+ strcat(kernel_debug_string,
+ s_kmod_keyword_mask_map[index].keyword);
+ strcat(kernel_debug_string, ",");
+ } else {
+ gossip_err("%s: overflow!\n", __func__);
+ strcpy(kernel_debug_string, ORANGEFS_ALL);
+ goto out;
+ }
+ }
+
+out:
+
+ return;
+}
+
+static void do_c_string(void *c_mask, int index)
+{
+ struct client_debug_mask *mask = (struct client_debug_mask *) c_mask;
+
+ if (keyword_is_amalgam(cdm_array[index].keyword))
+ goto out;
+
+ if ((mask->mask1 & cdm_array[index].mask1) ||
+ (mask->mask2 & cdm_array[index].mask2)) {
+ if ((strlen(client_debug_string) +
+ strlen(cdm_array[index].keyword) + 1)
+ < ORANGEFS_MAX_DEBUG_STRING_LEN - 2) {
+ strcat(client_debug_string,
+ cdm_array[index].keyword);
+ strcat(client_debug_string, ",");
+ } else {
+ gossip_err("%s: overflow!\n", __func__);
+ strcpy(client_debug_string, ORANGEFS_ALL);
+ goto out;
+ }
+ }
+out:
+ return;
+}
+
+static int keyword_is_amalgam(char *keyword)
+{
+ int rc = 0;
+
+ if ((!strcmp(keyword, ORANGEFS_ALL)) || (!strcmp(keyword, ORANGEFS_VERBOSE)))
+ rc = 1;
+
+ return rc;
+}
+
+/*
+ * kernel = type 0
+ * client = type 1
+ *
+ * return 1 if we found an amalgam.
+ */
+static int check_amalgam_keyword(void *mask, int type)
+{
+ __u64 *k_mask;
+ struct client_debug_mask *c_mask;
+ int k_all_index = num_kmod_keyword_mask_map - 1;
+ int rc = 0;
+
+ if (type) {
+ c_mask = (struct client_debug_mask *) mask;
+
+ if ((c_mask->mask1 == cdm_array[client_all_index].mask1) &&
+ (c_mask->mask2 == cdm_array[client_all_index].mask2)) {
+ strcpy(client_debug_string, ORANGEFS_ALL);
+ rc = 1;
+ goto out;
+ }
+
+ if ((c_mask->mask1 == cdm_array[client_verbose_index].mask1) &&
+ (c_mask->mask2 == cdm_array[client_verbose_index].mask2)) {
+ strcpy(client_debug_string, ORANGEFS_VERBOSE);
+ rc = 1;
+ goto out;
+ }
+
+ } else {
+ k_mask = (__u64 *) mask;
+
+ if (*k_mask >= s_kmod_keyword_mask_map[k_all_index].mask_val) {
+ strcpy(kernel_debug_string, ORANGEFS_ALL);
+ rc = 1;
+ goto out;
+ }
+ }
+
+out:
+
+ return rc;
+}
+
+/*
+ * kernel = type 0
+ * client = type 1
+ */
+static void debug_string_to_mask(char *debug_string, void *mask, int type)
+{
+ char *unchecked_keyword;
+ int i;
+ char *strsep_fodder = kstrdup(debug_string, GFP_KERNEL);
+ char *original_pointer;
+ int element_count = 0;
+ struct client_debug_mask *c_mask = NULL;
+ __u64 *k_mask = NULL;
+
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
+
+ if (type) {
+ c_mask = (struct client_debug_mask *)mask;
+ element_count = cdm_element_count;
+ } else {
+ k_mask = (__u64 *)mask;
+ *k_mask = 0;
+ element_count = num_kmod_keyword_mask_map;
+ }
+
+ original_pointer = strsep_fodder;
+ while ((unchecked_keyword = strsep(&strsep_fodder, ",")))
+ if (strlen(unchecked_keyword)) {
+ for (i = 0; i < element_count; i++)
+ if (type)
+ do_c_mask(i,
+ unchecked_keyword,
+ &c_mask);
+ else
+ do_k_mask(i,
+ unchecked_keyword,
+ &k_mask);
+ }
+
+ kfree(original_pointer);
+}
+
+static void do_c_mask(int i, char *unchecked_keyword,
+ struct client_debug_mask **sane_mask)
+{
+
+ if (!strcmp(cdm_array[i].keyword, unchecked_keyword)) {
+ (**sane_mask).mask1 = (**sane_mask).mask1 | cdm_array[i].mask1;
+ (**sane_mask).mask2 = (**sane_mask).mask2 | cdm_array[i].mask2;
+ }
+}
+
+static void do_k_mask(int i, char *unchecked_keyword, __u64 **sane_mask)
+{
+
+ if (!strcmp(s_kmod_keyword_mask_map[i].keyword, unchecked_keyword))
+ **sane_mask = (**sane_mask) |
+ s_kmod_keyword_mask_map[i].mask_val;
+}
+
+int orangefs_debugfs_new_client_mask(void __user *arg)
+{
+ struct dev_mask2_info_s mask2_info = {0};
+ int ret;
+
+ ret = copy_from_user(&mask2_info,
+ (void __user *)arg,
+ sizeof(struct dev_mask2_info_s));
+
+ if (ret != 0)
+ return -EIO;
+
+ client_debug_mask.mask1 = mask2_info.mask1_value;
+ client_debug_mask.mask2 = mask2_info.mask2_value;
+
+ pr_info("%s: client debug mask has been been received "
+ ":%llx: :%llx:\n",
+ __func__,
+ (unsigned long long)client_debug_mask.mask1,
+ (unsigned long long)client_debug_mask.mask2);
+
+ return ret;
+}
+
+int orangefs_debugfs_new_client_string(void __user *arg)
+{
+ int ret;
+
+ ret = copy_from_user(&client_debug_array_string,
+ (void __user *)arg,
+ ORANGEFS_MAX_DEBUG_STRING_LEN);
+
+ if (ret != 0) {
+ pr_info("%s: CLIENT_STRING: copy_from_user failed\n",
+ __func__);
+ return -EFAULT;
+ }
+
+ /*
+ * The real client-core makes an effort to ensure
+ * that actual strings that aren't too long to fit in
+ * this buffer is what we get here. We're going to use
+ * string functions on the stuff we got, so we'll make
+ * this extra effort to try and keep from
+ * flowing out of this buffer when we use the string
+ * functions, even if somehow the stuff we end up
+ * with here is garbage.
+ */
+ client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN - 1] =
+ '\0';
+
+ pr_info("%s: client debug array string has been received.\n",
+ __func__);
+
+ if (!help_string_initialized) {
+
+ /* Build a proper debug help string. */
+ ret = orangefs_prepare_debugfs_help_string(0);
+ if (ret) {
+ gossip_err("%s: no debug help string \n",
+ __func__);
+ return ret;
+ }
+
+ }
+
+ debug_mask_to_string(&client_debug_mask, 1);
+
+ debugfs_remove(client_debug_dentry);
+
+ orangefs_client_debug_init();
+
+ help_string_initialized++;
+
+ return 0;
+}
+
+int orangefs_debugfs_new_debug(void __user *arg)
+{
+ struct dev_mask_info_s mask_info = {0};
+ int ret;
+
+ ret = copy_from_user(&mask_info,
+ (void __user *)arg,
+ sizeof(mask_info));
+
+ if (ret != 0)
+ return -EIO;
+
+ if (mask_info.mask_type == KERNEL_MASK) {
+ if ((mask_info.mask_value == 0)
+ && (kernel_mask_set_mod_init)) {
+ /*
+ * the kernel debug mask was set when the
+ * kernel module was loaded; don't override
+ * it if the client-core was started without
+ * a value for ORANGEFS_KMODMASK.
+ */
+ return 0;
+ }
+ debug_mask_to_string(&mask_info.mask_value,
+ mask_info.mask_type);
+ orangefs_gossip_debug_mask = mask_info.mask_value;
+ pr_info("%s: kernel debug mask has been modified to "
+ ":%s: :%llx:\n",
+ __func__,
+ kernel_debug_string,
+ (unsigned long long)orangefs_gossip_debug_mask);
+ } else if (mask_info.mask_type == CLIENT_MASK) {
+ debug_mask_to_string(&mask_info.mask_value,
+ mask_info.mask_type);
+ pr_info("%s: client debug mask has been modified to"
+ ":%s: :%llx:\n",
+ __func__,
+ client_debug_string,
+ llu(mask_info.mask_value));
+ } else {
+ gossip_err("Invalid mask type....\n");
+ return -EINVAL;
+ }
+
+ return ret;
+}
diff --git a/fs/orangefs/orangefs-debugfs.h b/fs/orangefs/orangefs-debugfs.h
new file mode 100644
index 000000000..502f6dedc
--- /dev/null
+++ b/fs/orangefs/orangefs-debugfs.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+void orangefs_debugfs_init(int);
+void orangefs_debugfs_cleanup(void);
+int orangefs_prepare_debugfs_help_string(int);
+int orangefs_debugfs_new_client_mask(void __user *);
+int orangefs_debugfs_new_client_string(void __user *);
+int orangefs_debugfs_new_debug(void __user *);
diff --git a/fs/orangefs/orangefs-dev-proto.h b/fs/orangefs/orangefs-dev-proto.h
new file mode 100644
index 000000000..dc6609824
--- /dev/null
+++ b/fs/orangefs/orangefs-dev-proto.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#ifndef _ORANGEFS_DEV_PROTO_H
+#define _ORANGEFS_DEV_PROTO_H
+
+/*
+ * types and constants shared between user space and kernel space for
+ * device interaction using a common protocol
+ */
+
+/*
+ * valid orangefs kernel operation types
+ */
+#define ORANGEFS_VFS_OP_INVALID 0xFF000000
+#define ORANGEFS_VFS_OP_FILE_IO 0xFF000001
+#define ORANGEFS_VFS_OP_LOOKUP 0xFF000002
+#define ORANGEFS_VFS_OP_CREATE 0xFF000003
+#define ORANGEFS_VFS_OP_GETATTR 0xFF000004
+#define ORANGEFS_VFS_OP_REMOVE 0xFF000005
+#define ORANGEFS_VFS_OP_MKDIR 0xFF000006
+#define ORANGEFS_VFS_OP_READDIR 0xFF000007
+#define ORANGEFS_VFS_OP_SETATTR 0xFF000008
+#define ORANGEFS_VFS_OP_SYMLINK 0xFF000009
+#define ORANGEFS_VFS_OP_RENAME 0xFF00000A
+#define ORANGEFS_VFS_OP_STATFS 0xFF00000B
+#define ORANGEFS_VFS_OP_TRUNCATE 0xFF00000C
+#define ORANGEFS_VFS_OP_RA_FLUSH 0xFF00000D
+#define ORANGEFS_VFS_OP_FS_MOUNT 0xFF00000E
+#define ORANGEFS_VFS_OP_FS_UMOUNT 0xFF00000F
+#define ORANGEFS_VFS_OP_GETXATTR 0xFF000010
+#define ORANGEFS_VFS_OP_SETXATTR 0xFF000011
+#define ORANGEFS_VFS_OP_LISTXATTR 0xFF000012
+#define ORANGEFS_VFS_OP_REMOVEXATTR 0xFF000013
+#define ORANGEFS_VFS_OP_PARAM 0xFF000014
+#define ORANGEFS_VFS_OP_PERF_COUNT 0xFF000015
+#define ORANGEFS_VFS_OP_CANCEL 0xFF00EE00
+#define ORANGEFS_VFS_OP_FSYNC 0xFF00EE01
+#define ORANGEFS_VFS_OP_FSKEY 0xFF00EE02
+#define ORANGEFS_VFS_OP_READDIRPLUS 0xFF00EE03
+#define ORANGEFS_VFS_OP_FEATURES 0xFF00EE05 /* 2.9.6 */
+
+/* features is a 64-bit unsigned bitmask */
+#define ORANGEFS_FEATURE_READAHEAD 1
+
+/*
+ * Misc constants. Please retain them as multiples of 8!
+ * Otherwise 32-64 bit interactions will be messed up :)
+ */
+#define ORANGEFS_MAX_DEBUG_STRING_LEN 0x00000800
+
+#define ORANGEFS_MAX_DIRENT_COUNT_READDIR 512
+
+#include "upcall.h"
+#include "downcall.h"
+
+#endif
diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h
new file mode 100644
index 000000000..b5940ec18
--- /dev/null
+++ b/fs/orangefs/orangefs-kernel.h
@@ -0,0 +1,492 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * The ORANGEFS Linux kernel support allows ORANGEFS volumes to be mounted and
+ * accessed through the Linux VFS (i.e. using standard I/O system calls).
+ * This support is only needed on clients that wish to mount the file system.
+ *
+ */
+
+/*
+ * Declarations and macros for the ORANGEFS Linux kernel support.
+ */
+
+#ifndef __ORANGEFSKERNEL_H
+#define __ORANGEFSKERNEL_H
+
+#include <linux/kernel.h>
+#include <linux/moduleparam.h>
+#include <linux/statfs.h>
+#include <linux/backing-dev.h>
+#include <linux/device.h>
+#include <linux/mpage.h>
+#include <linux/namei.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+
+#include <linux/aio.h>
+#include <linux/posix_acl.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/compat.h>
+#include <linux/mount.h>
+#include <linux/uaccess.h>
+#include <linux/atomic.h>
+#include <linux/uio.h>
+#include <linux/sched/signal.h>
+#include <linux/mm.h>
+#include <linux/wait.h>
+#include <linux/dcache.h>
+#include <linux/pagemap.h>
+#include <linux/poll.h>
+#include <linux/rwsem.h>
+#include <linux/xattr.h>
+#include <linux/exportfs.h>
+#include <linux/hashtable.h>
+
+#include <asm/unaligned.h>
+
+#include "orangefs-dev-proto.h"
+
+#define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS 20
+
+#define ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS 30
+
+#define ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS 900 /* 15 minutes */
+
+#define ORANGEFS_REQDEVICE_NAME "pvfs2-req"
+
+#define ORANGEFS_DEVREQ_MAGIC 0x20030529
+#define ORANGEFS_PURGE_RETRY_COUNT 0x00000005
+
+#define MAX_DEV_REQ_UPSIZE (2 * sizeof(__s32) + \
+sizeof(__u64) + sizeof(struct orangefs_upcall_s))
+#define MAX_DEV_REQ_DOWNSIZE (2 * sizeof(__s32) + \
+sizeof(__u64) + sizeof(struct orangefs_downcall_s))
+
+/*
+ * valid orangefs kernel operation states
+ *
+ * unknown - op was just initialized
+ * waiting - op is on request_list (upward bound)
+ * inprogr - op is in progress (waiting for downcall)
+ * serviced - op has matching downcall; ok
+ * purged - op has to start a timer since client-core
+ * exited uncleanly before servicing op
+ * given up - submitter has given up waiting for it
+ */
+enum orangefs_vfs_op_states {
+ OP_VFS_STATE_UNKNOWN = 0,
+ OP_VFS_STATE_WAITING = 1,
+ OP_VFS_STATE_INPROGR = 2,
+ OP_VFS_STATE_SERVICED = 4,
+ OP_VFS_STATE_PURGED = 8,
+ OP_VFS_STATE_GIVEN_UP = 16,
+};
+
+/*
+ * orangefs kernel memory related flags
+ */
+
+#if (defined CONFIG_DEBUG_SLAB)
+#define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE
+#else
+#define ORANGEFS_CACHE_CREATE_FLAGS 0
+#endif
+
+extern int orangefs_init_acl(struct inode *inode, struct inode *dir);
+extern const struct xattr_handler *orangefs_xattr_handlers[];
+
+extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type, bool rcu);
+extern int orangefs_set_acl(struct user_namespace *mnt_userns,
+ struct inode *inode, struct posix_acl *acl,
+ int type);
+
+/*
+ * orangefs data structures
+ */
+struct orangefs_kernel_op_s {
+ enum orangefs_vfs_op_states op_state;
+ __u64 tag;
+
+ /*
+ * Set uses_shared_memory to non zero if this operation uses
+ * shared memory. If true, then a retry on the op must also
+ * get a new shared memory buffer and re-populate it.
+ * Cancels don't care - it only matters for service_operation()
+ * retry logics and cancels don't go through it anymore. It
+ * safely stays non-zero when we use it as slot_to_free.
+ */
+ union {
+ int uses_shared_memory;
+ int slot_to_free;
+ };
+
+ struct orangefs_upcall_s upcall;
+ struct orangefs_downcall_s downcall;
+
+ struct completion waitq;
+ spinlock_t lock;
+
+ int attempts;
+
+ struct list_head list;
+};
+
+#define set_op_state_waiting(op) ((op)->op_state = OP_VFS_STATE_WAITING)
+#define set_op_state_inprogress(op) ((op)->op_state = OP_VFS_STATE_INPROGR)
+#define set_op_state_given_up(op) ((op)->op_state = OP_VFS_STATE_GIVEN_UP)
+static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
+{
+ op->op_state = OP_VFS_STATE_SERVICED;
+ complete(&op->waitq);
+}
+
+#define op_state_waiting(op) ((op)->op_state & OP_VFS_STATE_WAITING)
+#define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
+#define op_state_serviced(op) ((op)->op_state & OP_VFS_STATE_SERVICED)
+#define op_state_purged(op) ((op)->op_state & OP_VFS_STATE_PURGED)
+#define op_state_given_up(op) ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
+#define op_is_cancel(op) ((op)->upcall.type == ORANGEFS_VFS_OP_CANCEL)
+
+void op_release(struct orangefs_kernel_op_s *op);
+
+extern void orangefs_bufmap_put(int);
+static inline void put_cancel(struct orangefs_kernel_op_s *op)
+{
+ orangefs_bufmap_put(op->slot_to_free);
+ op_release(op);
+}
+
+static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
+{
+ spin_lock(&op->lock);
+ if (unlikely(op_is_cancel(op))) {
+ list_del_init(&op->list);
+ spin_unlock(&op->lock);
+ put_cancel(op);
+ } else {
+ op->op_state |= OP_VFS_STATE_PURGED;
+ complete(&op->waitq);
+ spin_unlock(&op->lock);
+ }
+}
+
+/* per inode private orangefs info */
+struct orangefs_inode_s {
+ struct orangefs_object_kref refn;
+ char link_target[ORANGEFS_NAME_MAX];
+ /*
+ * Reading/Writing Extended attributes need to acquire the appropriate
+ * reader/writer semaphore on the orangefs_inode_s structure.
+ */
+ struct rw_semaphore xattr_sem;
+
+ struct inode vfs_inode;
+ sector_t last_failed_block_index_read;
+
+ unsigned long getattr_time;
+ unsigned long mapping_time;
+ int attr_valid;
+ kuid_t attr_uid;
+ kgid_t attr_gid;
+ unsigned long bitlock;
+
+ DECLARE_HASHTABLE(xattr_cache, 4);
+};
+
+/* per superblock private orangefs info */
+struct orangefs_sb_info_s {
+ struct orangefs_khandle root_khandle;
+ __s32 fs_id;
+ int id;
+ int flags;
+#define ORANGEFS_OPT_INTR 0x01
+#define ORANGEFS_OPT_LOCAL_LOCK 0x02
+ char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
+ struct super_block *sb;
+ int mount_pending;
+ int no_list;
+ struct list_head list;
+};
+
+struct orangefs_stats {
+ unsigned long cache_hits;
+ unsigned long cache_misses;
+ unsigned long reads;
+ unsigned long writes;
+};
+
+struct orangefs_cached_xattr {
+ struct hlist_node node;
+ char key[ORANGEFS_MAX_XATTR_NAMELEN];
+ char val[ORANGEFS_MAX_XATTR_VALUELEN];
+ ssize_t length;
+ unsigned long timeout;
+};
+
+struct orangefs_write_range {
+ loff_t pos;
+ size_t len;
+ kuid_t uid;
+ kgid_t gid;
+};
+
+extern struct orangefs_stats orangefs_stats;
+
+/*
+ * NOTE: See Documentation/filesystems/porting.rst for information
+ * on implementing FOO_I and properly accessing fs private data
+ */
+static inline struct orangefs_inode_s *ORANGEFS_I(struct inode *inode)
+{
+ return container_of(inode, struct orangefs_inode_s, vfs_inode);
+}
+
+static inline struct orangefs_sb_info_s *ORANGEFS_SB(struct super_block *sb)
+{
+ return (struct orangefs_sb_info_s *) sb->s_fs_info;
+}
+
+/* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
+static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
+{
+ union {
+ unsigned char u[8];
+ __u64 ino;
+ } ihandle;
+
+ ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
+ ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
+ ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
+ ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
+ ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
+ ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
+ ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
+ ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
+
+ return ihandle.ino;
+}
+
+static inline struct orangefs_khandle *get_khandle_from_ino(struct inode *inode)
+{
+ return &(ORANGEFS_I(inode)->refn.khandle);
+}
+
+static inline int is_root_handle(struct inode *inode)
+{
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s: root handle: %pU, this handle: %pU:\n",
+ __func__,
+ &ORANGEFS_SB(inode->i_sb)->root_khandle,
+ get_khandle_from_ino(inode));
+
+ if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
+ get_khandle_from_ino(inode)))
+ return 0;
+ else
+ return 1;
+}
+
+static inline int match_handle(struct orangefs_khandle resp_handle,
+ struct inode *inode)
+{
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s: one handle: %pU, another handle:%pU:\n",
+ __func__,
+ &resp_handle,
+ get_khandle_from_ino(inode));
+
+ if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
+ return 0;
+ else
+ return 1;
+}
+
+/*
+ * defined in orangefs-cache.c
+ */
+int op_cache_initialize(void);
+int op_cache_finalize(void);
+struct orangefs_kernel_op_s *op_alloc(__s32 type);
+void orangefs_new_tag(struct orangefs_kernel_op_s *op);
+char *get_opname_string(struct orangefs_kernel_op_s *new_op);
+
+int orangefs_inode_cache_initialize(void);
+int orangefs_inode_cache_finalize(void);
+
+/*
+ * defined in orangefs-mod.c
+ */
+void purge_inprogress_ops(void);
+
+/*
+ * defined in waitqueue.c
+ */
+void purge_waiting_ops(void);
+
+/*
+ * defined in super.c
+ */
+extern uint64_t orangefs_features;
+
+struct dentry *orangefs_mount(struct file_system_type *fst,
+ int flags,
+ const char *devname,
+ void *data);
+
+void orangefs_kill_sb(struct super_block *sb);
+int orangefs_remount(struct orangefs_sb_info_s *);
+
+int fsid_key_table_initialize(void);
+void fsid_key_table_finalize(void);
+
+/*
+ * defined in inode.c
+ */
+vm_fault_t orangefs_page_mkwrite(struct vm_fault *);
+struct inode *orangefs_new_inode(struct super_block *sb,
+ struct inode *dir,
+ int mode,
+ dev_t dev,
+ struct orangefs_object_kref *ref);
+
+int __orangefs_setattr(struct inode *, struct iattr *);
+int orangefs_setattr(struct user_namespace *, struct dentry *, struct iattr *);
+
+int orangefs_getattr(struct user_namespace *mnt_userns, const struct path *path,
+ struct kstat *stat, u32 request_mask, unsigned int flags);
+
+int orangefs_permission(struct user_namespace *mnt_userns,
+ struct inode *inode, int mask);
+
+int orangefs_update_time(struct inode *, struct timespec64 *, int);
+
+/*
+ * defined in xattr.c
+ */
+ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
+
+/*
+ * defined in namei.c
+ */
+struct inode *orangefs_iget(struct super_block *sb,
+ struct orangefs_object_kref *ref);
+
+/*
+ * defined in devorangefs-req.c
+ */
+extern uint32_t orangefs_userspace_version;
+
+int orangefs_dev_init(void);
+void orangefs_dev_cleanup(void);
+int is_daemon_in_service(void);
+bool __is_daemon_in_service(void);
+
+/*
+ * defined in file.c
+ */
+int orangefs_revalidate_mapping(struct inode *);
+ssize_t wait_for_direct_io(enum ORANGEFS_io_type, struct inode *, loff_t *,
+ struct iov_iter *, size_t, loff_t, struct orangefs_write_range *, int *,
+ struct file *);
+ssize_t do_readv_writev(enum ORANGEFS_io_type, struct file *, loff_t *,
+ struct iov_iter *);
+
+/*
+ * defined in orangefs-utils.c
+ */
+__s32 fsid_of_op(struct orangefs_kernel_op_s *op);
+
+ssize_t orangefs_inode_getxattr(struct inode *inode,
+ const char *name,
+ void *buffer,
+ size_t size);
+
+int orangefs_inode_setxattr(struct inode *inode,
+ const char *name,
+ const void *value,
+ size_t size,
+ int flags);
+
+#define ORANGEFS_GETATTR_NEW 1
+#define ORANGEFS_GETATTR_SIZE 2
+
+int orangefs_inode_getattr(struct inode *, int);
+
+int orangefs_inode_check_changed(struct inode *inode);
+
+int orangefs_inode_setattr(struct inode *inode);
+
+bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op);
+
+int orangefs_normalize_to_errno(__s32 error_code);
+
+extern struct mutex orangefs_request_mutex;
+extern int op_timeout_secs;
+extern int slot_timeout_secs;
+extern int orangefs_cache_timeout_msecs;
+extern int orangefs_dcache_timeout_msecs;
+extern int orangefs_getattr_timeout_msecs;
+extern struct list_head orangefs_superblocks;
+extern spinlock_t orangefs_superblocks_lock;
+extern struct list_head orangefs_request_list;
+extern spinlock_t orangefs_request_list_lock;
+extern wait_queue_head_t orangefs_request_list_waitq;
+extern struct list_head *orangefs_htable_ops_in_progress;
+extern spinlock_t orangefs_htable_ops_in_progress_lock;
+extern int hash_table_size;
+
+extern const struct file_operations orangefs_file_operations;
+extern const struct inode_operations orangefs_symlink_inode_operations;
+extern const struct inode_operations orangefs_dir_inode_operations;
+extern const struct file_operations orangefs_dir_operations;
+extern const struct dentry_operations orangefs_dentry_operations;
+
+/*
+ * misc convenience macros
+ */
+
+#define ORANGEFS_OP_INTERRUPTIBLE 1 /* service_operation() is interruptible */
+#define ORANGEFS_OP_PRIORITY 2 /* service_operation() is high priority */
+#define ORANGEFS_OP_CANCELLATION 4 /* this is a cancellation */
+#define ORANGEFS_OP_NO_MUTEX 8 /* don't acquire request_mutex */
+#define ORANGEFS_OP_ASYNC 16 /* Queue it, but don't wait */
+#define ORANGEFS_OP_WRITEBACK 32
+
+int service_operation(struct orangefs_kernel_op_s *op,
+ const char *op_name,
+ int flags);
+
+#define get_interruptible_flag(inode) \
+ ((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
+ ORANGEFS_OP_INTERRUPTIBLE : 0)
+
+#define fill_default_sys_attrs(sys_attr, type, mode) \
+do { \
+ sys_attr.owner = from_kuid(&init_user_ns, current_fsuid()); \
+ sys_attr.group = from_kgid(&init_user_ns, current_fsgid()); \
+ sys_attr.perms = ORANGEFS_util_translate_mode(mode); \
+ sys_attr.mtime = 0; \
+ sys_attr.atime = 0; \
+ sys_attr.ctime = 0; \
+ sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE; \
+} while (0)
+
+static inline void orangefs_set_timeout(struct dentry *dentry)
+{
+ unsigned long time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
+
+ dentry->d_fsdata = (void *) time;
+}
+
+#endif /* __ORANGEFSKERNEL_H */
diff --git a/fs/orangefs/orangefs-mod.c b/fs/orangefs/orangefs-mod.c
new file mode 100644
index 000000000..5ab741c60
--- /dev/null
+++ b/fs/orangefs/orangefs-mod.c
@@ -0,0 +1,231 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * Changes by Acxiom Corporation to add proc file handler for pvfs2 client
+ * parameters, Copyright Acxiom Corporation, 2005.
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-debugfs.h"
+#include "orangefs-sysfs.h"
+
+/* ORANGEFS_VERSION is a ./configure define */
+#ifndef ORANGEFS_VERSION
+#define ORANGEFS_VERSION "upstream"
+#endif
+
+/*
+ * global variables declared here
+ */
+
+struct orangefs_stats orangefs_stats;
+
+/* the size of the hash tables for ops in progress */
+int hash_table_size = 509;
+
+static ulong module_parm_debug_mask;
+__u64 orangefs_gossip_debug_mask;
+int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS;
+int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS;
+int orangefs_cache_timeout_msecs = 500;
+int orangefs_dcache_timeout_msecs = 50;
+int orangefs_getattr_timeout_msecs = 50;
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("ORANGEFS Development Team");
+MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS");
+MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)");
+MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds");
+MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds");
+MODULE_PARM_DESC(hash_table_size,
+ "size of hash table for operations in progress");
+
+static struct file_system_type orangefs_fs_type = {
+ .name = "pvfs2",
+ .mount = orangefs_mount,
+ .kill_sb = orangefs_kill_sb,
+ .owner = THIS_MODULE,
+};
+
+module_param(hash_table_size, int, 0);
+module_param(module_parm_debug_mask, ulong, 0644);
+module_param(op_timeout_secs, int, 0);
+module_param(slot_timeout_secs, int, 0);
+
+/*
+ * Blocks non-priority requests from being queued for servicing. This
+ * could be used for protecting the request list data structure, but
+ * for now it's only being used to stall the op addition to the request
+ * list
+ */
+DEFINE_MUTEX(orangefs_request_mutex);
+
+/* hash table for storing operations waiting for matching downcall */
+struct list_head *orangefs_htable_ops_in_progress;
+DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock);
+
+/* list for queueing upcall operations */
+LIST_HEAD(orangefs_request_list);
+
+/* used to protect the above orangefs_request_list */
+DEFINE_SPINLOCK(orangefs_request_list_lock);
+
+/* used for incoming request notification */
+DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq);
+
+static int __init orangefs_init(void)
+{
+ int ret;
+ __u32 i = 0;
+
+ if (op_timeout_secs < 0)
+ op_timeout_secs = 0;
+
+ if (slot_timeout_secs < 0)
+ slot_timeout_secs = 0;
+
+ /* initialize global book keeping data structures */
+ ret = op_cache_initialize();
+ if (ret < 0)
+ goto out;
+
+ ret = orangefs_inode_cache_initialize();
+ if (ret < 0)
+ goto cleanup_op;
+
+ orangefs_htable_ops_in_progress =
+ kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
+ if (!orangefs_htable_ops_in_progress) {
+ ret = -ENOMEM;
+ goto cleanup_inode;
+ }
+
+ /* initialize a doubly linked at each hash table index */
+ for (i = 0; i < hash_table_size; i++)
+ INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]);
+
+ ret = fsid_key_table_initialize();
+ if (ret < 0)
+ goto cleanup_progress_table;
+
+ /*
+ * Build the contents of /sys/kernel/debug/orangefs/debug-help
+ * from the keywords in the kernel keyword/mask array.
+ *
+ * The keywords in the client keyword/mask array are
+ * unknown at boot time.
+ *
+ * orangefs_prepare_debugfs_help_string will be used again
+ * later to rebuild the debug-help-string after the client starts
+ * and passes along the needed info. The argument signifies
+ * which time orangefs_prepare_debugfs_help_string is being
+ * called.
+ */
+ ret = orangefs_prepare_debugfs_help_string(1);
+ if (ret)
+ goto cleanup_key_table;
+
+ orangefs_debugfs_init(module_parm_debug_mask);
+
+ ret = orangefs_sysfs_init();
+ if (ret)
+ goto sysfs_init_failed;
+
+ /* Initialize the orangefsdev subsystem. */
+ ret = orangefs_dev_init();
+ if (ret < 0) {
+ gossip_err("%s: could not initialize device subsystem %d!\n",
+ __func__,
+ ret);
+ goto cleanup_sysfs;
+ }
+
+ ret = register_filesystem(&orangefs_fs_type);
+ if (ret == 0) {
+ pr_info("%s: module version %s loaded\n",
+ __func__,
+ ORANGEFS_VERSION);
+ goto out;
+ }
+
+ orangefs_dev_cleanup();
+
+cleanup_sysfs:
+ orangefs_sysfs_exit();
+
+sysfs_init_failed:
+ orangefs_debugfs_cleanup();
+
+cleanup_key_table:
+ fsid_key_table_finalize();
+
+cleanup_progress_table:
+ kfree(orangefs_htable_ops_in_progress);
+
+cleanup_inode:
+ orangefs_inode_cache_finalize();
+
+cleanup_op:
+ op_cache_finalize();
+
+out:
+ return ret;
+}
+
+static void __exit orangefs_exit(void)
+{
+ int i = 0;
+ gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n");
+
+ unregister_filesystem(&orangefs_fs_type);
+ orangefs_debugfs_cleanup();
+ orangefs_sysfs_exit();
+ fsid_key_table_finalize();
+ orangefs_dev_cleanup();
+ BUG_ON(!list_empty(&orangefs_request_list));
+ for (i = 0; i < hash_table_size; i++)
+ BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i]));
+
+ orangefs_inode_cache_finalize();
+ op_cache_finalize();
+
+ kfree(orangefs_htable_ops_in_progress);
+
+ pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION);
+}
+
+/*
+ * What we do in this function is to walk the list of operations
+ * that are in progress in the hash table and mark them as purged as well.
+ */
+void purge_inprogress_ops(void)
+{
+ int i;
+
+ for (i = 0; i < hash_table_size; i++) {
+ struct orangefs_kernel_op_s *op;
+ struct orangefs_kernel_op_s *next;
+
+ spin_lock(&orangefs_htable_ops_in_progress_lock);
+ list_for_each_entry_safe(op,
+ next,
+ &orangefs_htable_ops_in_progress[i],
+ list) {
+ set_op_state_purged(op);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: op:%s: op_state:%d: process:%s:\n",
+ __func__,
+ get_opname_string(op),
+ op->op_state,
+ current->comm);
+ }
+ spin_unlock(&orangefs_htable_ops_in_progress_lock);
+ }
+}
+
+module_init(orangefs_init);
+module_exit(orangefs_exit);
diff --git a/fs/orangefs/orangefs-sysfs.c b/fs/orangefs/orangefs-sysfs.c
new file mode 100644
index 000000000..be4ba03a0
--- /dev/null
+++ b/fs/orangefs/orangefs-sysfs.c
@@ -0,0 +1,1326 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Documentation/ABI/stable/sysfs-fs-orangefs:
+ *
+ * What: /sys/fs/orangefs/perf_counter_reset
+ * Date: June 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * echo a 0 or a 1 into perf_counter_reset to
+ * reset all the counters in
+ * /sys/fs/orangefs/perf_counters
+ * except ones with PINT_PERF_PRESERVE set.
+ *
+ *
+ * What: /sys/fs/orangefs/perf_counters/...
+ * Date: Jun 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * Counters and settings for various caches.
+ * Read only.
+ *
+ *
+ * What: /sys/fs/orangefs/perf_time_interval_secs
+ * Date: Jun 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * Length of perf counter intervals in
+ * seconds.
+ *
+ *
+ * What: /sys/fs/orangefs/perf_history_size
+ * Date: Jun 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * The perf_counters cache statistics have N, or
+ * perf_history_size, samples. The default is
+ * one.
+ *
+ * Every perf_time_interval_secs the (first)
+ * samples are reset.
+ *
+ * If N is greater than one, the "current" set
+ * of samples is reset, and the samples from the
+ * other N-1 intervals remain available.
+ *
+ *
+ * What: /sys/fs/orangefs/op_timeout_secs
+ * Date: Jun 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * Service operation timeout in seconds.
+ *
+ *
+ * What: /sys/fs/orangefs/slot_timeout_secs
+ * Date: Jun 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * "Slot" timeout in seconds. A "slot"
+ * is an indexed buffer in the shared
+ * memory segment used for communication
+ * between the kernel module and userspace.
+ * Slots are requested and waited for,
+ * the wait times out after slot_timeout_secs.
+ *
+ * What: /sys/fs/orangefs/cache_timeout_msecs
+ * Date: Mar 2018
+ * Contact: Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * Time in milliseconds between which
+ * orangefs_revalidate_mapping will invalidate the page
+ * cache.
+ *
+ * What: /sys/fs/orangefs/dcache_timeout_msecs
+ * Date: Jul 2016
+ * Contact: Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * Time lookup is valid in milliseconds.
+ *
+ * What: /sys/fs/orangefs/getattr_timeout_msecs
+ * Date: Jul 2016
+ * Contact: Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * Time getattr is valid in milliseconds.
+ *
+ * What: /sys/fs/orangefs/readahead_count
+ * Date: Aug 2016
+ * Contact: Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * Readahead cache buffer count.
+ *
+ * What: /sys/fs/orangefs/readahead_size
+ * Date: Aug 2016
+ * Contact: Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * Readahead cache buffer size.
+ *
+ * What: /sys/fs/orangefs/readahead_count_size
+ * Date: Aug 2016
+ * Contact: Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * Readahead cache buffer count and size.
+ *
+ * What: /sys/fs/orangefs/readahead_readcnt
+ * Date: Jan 2017
+ * Contact: Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * Number of buffers (in multiples of readahead_size)
+ * which can be read ahead for a single file at once.
+ *
+ * What: /sys/fs/orangefs/acache/...
+ * Date: Jun 2015
+ * Contact: Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * Attribute cache configurable settings.
+ *
+ *
+ * What: /sys/fs/orangefs/ncache/...
+ * Date: Jun 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * Name cache configurable settings.
+ *
+ *
+ * What: /sys/fs/orangefs/capcache/...
+ * Date: Jun 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * Capability cache configurable settings.
+ *
+ *
+ * What: /sys/fs/orangefs/ccache/...
+ * Date: Jun 2015
+ * Contact: Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * Credential cache configurable settings.
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/kobject.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-sysfs.h"
+
+#define ORANGEFS_KOBJ_ID "orangefs"
+#define ACACHE_KOBJ_ID "acache"
+#define CAPCACHE_KOBJ_ID "capcache"
+#define CCACHE_KOBJ_ID "ccache"
+#define NCACHE_KOBJ_ID "ncache"
+#define PC_KOBJ_ID "pc"
+#define STATS_KOBJ_ID "stats"
+
+/*
+ * Every item calls orangefs_attr_show and orangefs_attr_store through
+ * orangefs_sysfs_ops. They look at the orangefs_attributes further below to
+ * call one of sysfs_int_show, sysfs_int_store, sysfs_service_op_show, or
+ * sysfs_service_op_store.
+ */
+
+struct orangefs_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct kobject *kobj,
+ struct orangefs_attribute *attr,
+ char *buf);
+ ssize_t (*store)(struct kobject *kobj,
+ struct orangefs_attribute *attr,
+ const char *buf,
+ size_t count);
+};
+
+static ssize_t orangefs_attr_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
+{
+ struct orangefs_attribute *attribute;
+
+ attribute = container_of(attr, struct orangefs_attribute, attr);
+ if (!attribute->show)
+ return -EIO;
+ return attribute->show(kobj, attribute, buf);
+}
+
+static ssize_t orangefs_attr_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buf,
+ size_t len)
+{
+ struct orangefs_attribute *attribute;
+
+ if (!strcmp(kobj->name, PC_KOBJ_ID) ||
+ !strcmp(kobj->name, STATS_KOBJ_ID))
+ return -EPERM;
+
+ attribute = container_of(attr, struct orangefs_attribute, attr);
+ if (!attribute->store)
+ return -EIO;
+ return attribute->store(kobj, attribute, buf, len);
+}
+
+static const struct sysfs_ops orangefs_sysfs_ops = {
+ .show = orangefs_attr_show,
+ .store = orangefs_attr_store,
+};
+
+static ssize_t sysfs_int_show(struct kobject *kobj,
+ struct orangefs_attribute *attr, char *buf)
+{
+ int rc = -EIO;
+
+ gossip_debug(GOSSIP_SYSFS_DEBUG, "sysfs_int_show: id:%s:\n",
+ kobj->name);
+
+ if (!strcmp(kobj->name, ORANGEFS_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "op_timeout_secs")) {
+ rc = scnprintf(buf,
+ PAGE_SIZE,
+ "%d\n",
+ op_timeout_secs);
+ goto out;
+ } else if (!strcmp(attr->attr.name,
+ "slot_timeout_secs")) {
+ rc = scnprintf(buf,
+ PAGE_SIZE,
+ "%d\n",
+ slot_timeout_secs);
+ goto out;
+ } else if (!strcmp(attr->attr.name,
+ "cache_timeout_msecs")) {
+ rc = scnprintf(buf,
+ PAGE_SIZE,
+ "%d\n",
+ orangefs_cache_timeout_msecs);
+ goto out;
+ } else if (!strcmp(attr->attr.name,
+ "dcache_timeout_msecs")) {
+ rc = scnprintf(buf,
+ PAGE_SIZE,
+ "%d\n",
+ orangefs_dcache_timeout_msecs);
+ goto out;
+ } else if (!strcmp(attr->attr.name,
+ "getattr_timeout_msecs")) {
+ rc = scnprintf(buf,
+ PAGE_SIZE,
+ "%d\n",
+ orangefs_getattr_timeout_msecs);
+ goto out;
+ } else {
+ goto out;
+ }
+
+ } else if (!strcmp(kobj->name, STATS_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "reads")) {
+ rc = scnprintf(buf,
+ PAGE_SIZE,
+ "%lu\n",
+ orangefs_stats.reads);
+ goto out;
+ } else if (!strcmp(attr->attr.name, "writes")) {
+ rc = scnprintf(buf,
+ PAGE_SIZE,
+ "%lu\n",
+ orangefs_stats.writes);
+ goto out;
+ } else {
+ goto out;
+ }
+ }
+
+out:
+
+ return rc;
+}
+
+static ssize_t sysfs_int_store(struct kobject *kobj,
+ struct orangefs_attribute *attr, const char *buf, size_t count)
+{
+ int rc = 0;
+
+ gossip_debug(GOSSIP_SYSFS_DEBUG,
+ "sysfs_int_store: start attr->attr.name:%s: buf:%s:\n",
+ attr->attr.name, buf);
+
+ if (!strcmp(attr->attr.name, "op_timeout_secs")) {
+ rc = kstrtoint(buf, 0, &op_timeout_secs);
+ goto out;
+ } else if (!strcmp(attr->attr.name, "slot_timeout_secs")) {
+ rc = kstrtoint(buf, 0, &slot_timeout_secs);
+ goto out;
+ } else if (!strcmp(attr->attr.name, "cache_timeout_msecs")) {
+ rc = kstrtoint(buf, 0, &orangefs_cache_timeout_msecs);
+ goto out;
+ } else if (!strcmp(attr->attr.name, "dcache_timeout_msecs")) {
+ rc = kstrtoint(buf, 0, &orangefs_dcache_timeout_msecs);
+ goto out;
+ } else if (!strcmp(attr->attr.name, "getattr_timeout_msecs")) {
+ rc = kstrtoint(buf, 0, &orangefs_getattr_timeout_msecs);
+ goto out;
+ } else {
+ goto out;
+ }
+
+out:
+ if (rc)
+ rc = -EINVAL;
+ else
+ rc = count;
+
+ return rc;
+}
+
+/*
+ * obtain attribute values from userspace with a service operation.
+ */
+static ssize_t sysfs_service_op_show(struct kobject *kobj,
+ struct orangefs_attribute *attr, char *buf)
+{
+ struct orangefs_kernel_op_s *new_op = NULL;
+ int rc = 0;
+ char *ser_op_type = NULL;
+ __u32 op_alloc_type;
+
+ gossip_debug(GOSSIP_SYSFS_DEBUG,
+ "sysfs_service_op_show: id:%s:\n",
+ kobj->name);
+
+ if (strcmp(kobj->name, PC_KOBJ_ID))
+ op_alloc_type = ORANGEFS_VFS_OP_PARAM;
+ else
+ op_alloc_type = ORANGEFS_VFS_OP_PERF_COUNT;
+
+ new_op = op_alloc(op_alloc_type);
+ if (!new_op)
+ return -ENOMEM;
+
+ /* Can't do a service_operation if the client is not running... */
+ rc = is_daemon_in_service();
+ if (rc) {
+ pr_info_ratelimited("%s: Client not running :%d:\n",
+ __func__,
+ is_daemon_in_service());
+ goto out;
+ }
+
+ if (strcmp(kobj->name, PC_KOBJ_ID))
+ new_op->upcall.req.param.type = ORANGEFS_PARAM_REQUEST_GET;
+
+ if (!strcmp(kobj->name, ORANGEFS_KOBJ_ID)) {
+ /* Drop unsupported requests first. */
+ if (!(orangefs_features & ORANGEFS_FEATURE_READAHEAD) &&
+ (!strcmp(attr->attr.name, "readahead_count") ||
+ !strcmp(attr->attr.name, "readahead_size") ||
+ !strcmp(attr->attr.name, "readahead_count_size") ||
+ !strcmp(attr->attr.name, "readahead_readcnt"))) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (!strcmp(attr->attr.name, "perf_history_size"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_PERF_HISTORY_SIZE;
+ else if (!strcmp(attr->attr.name,
+ "perf_time_interval_secs"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_PERF_TIME_INTERVAL_SECS;
+ else if (!strcmp(attr->attr.name,
+ "perf_counter_reset"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_PERF_RESET;
+
+ else if (!strcmp(attr->attr.name,
+ "readahead_count"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT;
+
+ else if (!strcmp(attr->attr.name,
+ "readahead_size"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_SIZE;
+
+ else if (!strcmp(attr->attr.name,
+ "readahead_count_size"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT_SIZE;
+
+ else if (!strcmp(attr->attr.name,
+ "readahead_readcnt"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_READCNT;
+ } else if (!strcmp(kobj->name, ACACHE_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "timeout_msecs"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_TIMEOUT_MSECS;
+
+ if (!strcmp(attr->attr.name, "hard_limit"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_HARD_LIMIT;
+
+ if (!strcmp(attr->attr.name, "soft_limit"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_SOFT_LIMIT;
+
+ if (!strcmp(attr->attr.name, "reclaim_percentage"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_RECLAIM_PERCENTAGE;
+
+ } else if (!strcmp(kobj->name, CAPCACHE_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "timeout_secs"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_TIMEOUT_SECS;
+
+ if (!strcmp(attr->attr.name, "hard_limit"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_HARD_LIMIT;
+
+ if (!strcmp(attr->attr.name, "soft_limit"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_SOFT_LIMIT;
+
+ if (!strcmp(attr->attr.name, "reclaim_percentage"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_RECLAIM_PERCENTAGE;
+
+ } else if (!strcmp(kobj->name, CCACHE_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "timeout_secs"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_TIMEOUT_SECS;
+
+ if (!strcmp(attr->attr.name, "hard_limit"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_HARD_LIMIT;
+
+ if (!strcmp(attr->attr.name, "soft_limit"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_SOFT_LIMIT;
+
+ if (!strcmp(attr->attr.name, "reclaim_percentage"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_RECLAIM_PERCENTAGE;
+
+ } else if (!strcmp(kobj->name, NCACHE_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "timeout_msecs"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_TIMEOUT_MSECS;
+
+ if (!strcmp(attr->attr.name, "hard_limit"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_HARD_LIMIT;
+
+ if (!strcmp(attr->attr.name, "soft_limit"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_SOFT_LIMIT;
+
+ if (!strcmp(attr->attr.name, "reclaim_percentage"))
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_RECLAIM_PERCENTAGE;
+
+ } else if (!strcmp(kobj->name, PC_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, ACACHE_KOBJ_ID))
+ new_op->upcall.req.perf_count.type =
+ ORANGEFS_PERF_COUNT_REQUEST_ACACHE;
+
+ if (!strcmp(attr->attr.name, CAPCACHE_KOBJ_ID))
+ new_op->upcall.req.perf_count.type =
+ ORANGEFS_PERF_COUNT_REQUEST_CAPCACHE;
+
+ if (!strcmp(attr->attr.name, NCACHE_KOBJ_ID))
+ new_op->upcall.req.perf_count.type =
+ ORANGEFS_PERF_COUNT_REQUEST_NCACHE;
+
+ } else {
+ gossip_err("sysfs_service_op_show: unknown kobj_id:%s:\n",
+ kobj->name);
+ rc = -EINVAL;
+ goto out;
+ }
+
+
+ if (strcmp(kobj->name, PC_KOBJ_ID))
+ ser_op_type = "orangefs_param";
+ else
+ ser_op_type = "orangefs_perf_count";
+
+ /*
+ * The service_operation will return an errno return code on
+ * error, and zero on success.
+ */
+ rc = service_operation(new_op, ser_op_type, ORANGEFS_OP_INTERRUPTIBLE);
+
+out:
+ if (!rc) {
+ if (strcmp(kobj->name, PC_KOBJ_ID)) {
+ if (new_op->upcall.req.param.op ==
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT_SIZE) {
+ rc = scnprintf(buf, PAGE_SIZE, "%d %d\n",
+ (int)new_op->downcall.resp.param.u.
+ value32[0],
+ (int)new_op->downcall.resp.param.u.
+ value32[1]);
+ } else {
+ rc = scnprintf(buf, PAGE_SIZE, "%d\n",
+ (int)new_op->downcall.resp.param.u.value64);
+ }
+ } else {
+ rc = scnprintf(
+ buf,
+ PAGE_SIZE,
+ "%s",
+ new_op->downcall.resp.perf_count.buffer);
+ }
+ }
+
+ op_release(new_op);
+
+ return rc;
+
+}
+
+/*
+ * pass attribute values back to userspace with a service operation.
+ *
+ * We have to do a memory allocation, an sscanf and a service operation.
+ * And we have to evaluate what the user entered, to make sure the
+ * value is within the range supported by the attribute. So, there's
+ * a lot of return code checking and mapping going on here.
+ *
+ * We want to return 1 if we think everything went OK, and
+ * EINVAL if not.
+ */
+static ssize_t sysfs_service_op_store(struct kobject *kobj,
+ struct orangefs_attribute *attr, const char *buf, size_t count)
+{
+ struct orangefs_kernel_op_s *new_op = NULL;
+ int val = 0;
+ int rc = 0;
+
+ gossip_debug(GOSSIP_SYSFS_DEBUG,
+ "sysfs_service_op_store: id:%s:\n",
+ kobj->name);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_PARAM);
+ if (!new_op)
+ return -EINVAL; /* sic */
+
+ /* Can't do a service_operation if the client is not running... */
+ rc = is_daemon_in_service();
+ if (rc) {
+ pr_info("%s: Client not running :%d:\n",
+ __func__,
+ is_daemon_in_service());
+ goto out;
+ }
+
+ /*
+ * The value we want to send back to userspace is in buf, unless this
+ * there are two parameters, which is specially handled below.
+ */
+ if (strcmp(kobj->name, ORANGEFS_KOBJ_ID) ||
+ strcmp(attr->attr.name, "readahead_count_size")) {
+ rc = kstrtoint(buf, 0, &val);
+ if (rc)
+ goto out;
+ }
+
+ new_op->upcall.req.param.type = ORANGEFS_PARAM_REQUEST_SET;
+
+ if (!strcmp(kobj->name, ORANGEFS_KOBJ_ID)) {
+ /* Drop unsupported requests first. */
+ if (!(orangefs_features & ORANGEFS_FEATURE_READAHEAD) &&
+ (!strcmp(attr->attr.name, "readahead_count") ||
+ !strcmp(attr->attr.name, "readahead_size") ||
+ !strcmp(attr->attr.name, "readahead_count_size") ||
+ !strcmp(attr->attr.name, "readahead_readcnt"))) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (!strcmp(attr->attr.name, "perf_history_size")) {
+ if (val > 0) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_PERF_HISTORY_SIZE;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "perf_time_interval_secs")) {
+ if (val > 0) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_PERF_TIME_INTERVAL_SECS;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "perf_counter_reset")) {
+ if ((val == 0) || (val == 1)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_PERF_RESET;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "readahead_count")) {
+ if ((val >= 0)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "readahead_size")) {
+ if ((val >= 0)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_SIZE;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "readahead_count_size")) {
+ int val1, val2;
+ rc = sscanf(buf, "%d %d", &val1, &val2);
+ if (rc < 2) {
+ rc = 0;
+ goto out;
+ }
+ if ((val1 >= 0) && (val2 >= 0)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT_SIZE;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ new_op->upcall.req.param.u.value32[0] = val1;
+ new_op->upcall.req.param.u.value32[1] = val2;
+ goto value_set;
+ } else if (!strcmp(attr->attr.name,
+ "readahead_readcnt")) {
+ if ((val >= 0)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_READCNT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ }
+
+ } else if (!strcmp(kobj->name, ACACHE_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "hard_limit")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_HARD_LIMIT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name, "soft_limit")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_SOFT_LIMIT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "reclaim_percentage")) {
+ if ((val > -1) && (val < 101)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_RECLAIM_PERCENTAGE;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name, "timeout_msecs")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_TIMEOUT_MSECS;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ }
+
+ } else if (!strcmp(kobj->name, CAPCACHE_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "hard_limit")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_HARD_LIMIT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name, "soft_limit")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_SOFT_LIMIT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "reclaim_percentage")) {
+ if ((val > -1) && (val < 101)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_RECLAIM_PERCENTAGE;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name, "timeout_secs")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_TIMEOUT_SECS;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ }
+
+ } else if (!strcmp(kobj->name, CCACHE_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "hard_limit")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_HARD_LIMIT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name, "soft_limit")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_SOFT_LIMIT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "reclaim_percentage")) {
+ if ((val > -1) && (val < 101)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_RECLAIM_PERCENTAGE;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name, "timeout_secs")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_TIMEOUT_SECS;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ }
+
+ } else if (!strcmp(kobj->name, NCACHE_KOBJ_ID)) {
+ if (!strcmp(attr->attr.name, "hard_limit")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_HARD_LIMIT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name, "soft_limit")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_SOFT_LIMIT;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name,
+ "reclaim_percentage")) {
+ if ((val > -1) && (val < 101)) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_RECLAIM_PERCENTAGE;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ } else if (!strcmp(attr->attr.name, "timeout_msecs")) {
+ if (val > -1) {
+ new_op->upcall.req.param.op =
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_TIMEOUT_MSECS;
+ } else {
+ rc = 0;
+ goto out;
+ }
+ }
+
+ } else {
+ gossip_err("sysfs_service_op_store: unknown kobj_id:%s:\n",
+ kobj->name);
+ rc = -EINVAL;
+ goto out;
+ }
+
+ new_op->upcall.req.param.u.value64 = val;
+value_set:
+
+ /*
+ * The service_operation will return a errno return code on
+ * error, and zero on success.
+ */
+ rc = service_operation(new_op, "orangefs_param", ORANGEFS_OP_INTERRUPTIBLE);
+
+ if (rc < 0) {
+ gossip_err("sysfs_service_op_store: service op returned:%d:\n",
+ rc);
+ rc = 0;
+ } else {
+ rc = count;
+ }
+
+out:
+ op_release(new_op);
+
+ if (rc == -ENOMEM || rc == 0)
+ rc = -EINVAL;
+
+ return rc;
+}
+
+static struct orangefs_attribute op_timeout_secs_attribute =
+ __ATTR(op_timeout_secs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute slot_timeout_secs_attribute =
+ __ATTR(slot_timeout_secs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute cache_timeout_msecs_attribute =
+ __ATTR(cache_timeout_msecs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute dcache_timeout_msecs_attribute =
+ __ATTR(dcache_timeout_msecs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute getattr_timeout_msecs_attribute =
+ __ATTR(getattr_timeout_msecs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute readahead_count_attribute =
+ __ATTR(readahead_count, 0664, sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute readahead_size_attribute =
+ __ATTR(readahead_size, 0664, sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute readahead_count_size_attribute =
+ __ATTR(readahead_count_size, 0664, sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute readahead_readcnt_attribute =
+ __ATTR(readahead_readcnt, 0664, sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute perf_counter_reset_attribute =
+ __ATTR(perf_counter_reset,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute perf_history_size_attribute =
+ __ATTR(perf_history_size,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute perf_time_interval_secs_attribute =
+ __ATTR(perf_time_interval_secs,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct attribute *orangefs_default_attrs[] = {
+ &op_timeout_secs_attribute.attr,
+ &slot_timeout_secs_attribute.attr,
+ &cache_timeout_msecs_attribute.attr,
+ &dcache_timeout_msecs_attribute.attr,
+ &getattr_timeout_msecs_attribute.attr,
+ &readahead_count_attribute.attr,
+ &readahead_size_attribute.attr,
+ &readahead_count_size_attribute.attr,
+ &readahead_readcnt_attribute.attr,
+ &perf_counter_reset_attribute.attr,
+ &perf_history_size_attribute.attr,
+ &perf_time_interval_secs_attribute.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(orangefs_default);
+
+static struct kobject *orangefs_obj;
+
+static void orangefs_obj_release(struct kobject *kobj)
+{
+ kfree(orangefs_obj);
+ orangefs_obj = NULL;
+}
+
+static struct kobj_type orangefs_ktype = {
+ .sysfs_ops = &orangefs_sysfs_ops,
+ .default_groups = orangefs_default_groups,
+ .release = orangefs_obj_release,
+};
+
+static struct orangefs_attribute acache_hard_limit_attribute =
+ __ATTR(hard_limit,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute acache_reclaim_percent_attribute =
+ __ATTR(reclaim_percentage,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute acache_soft_limit_attribute =
+ __ATTR(soft_limit,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute acache_timeout_msecs_attribute =
+ __ATTR(timeout_msecs,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct attribute *acache_orangefs_default_attrs[] = {
+ &acache_hard_limit_attribute.attr,
+ &acache_reclaim_percent_attribute.attr,
+ &acache_soft_limit_attribute.attr,
+ &acache_timeout_msecs_attribute.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(acache_orangefs_default);
+
+static struct kobject *acache_orangefs_obj;
+
+static void acache_orangefs_obj_release(struct kobject *kobj)
+{
+ kfree(acache_orangefs_obj);
+ acache_orangefs_obj = NULL;
+}
+
+static struct kobj_type acache_orangefs_ktype = {
+ .sysfs_ops = &orangefs_sysfs_ops,
+ .default_groups = acache_orangefs_default_groups,
+ .release = acache_orangefs_obj_release,
+};
+
+static struct orangefs_attribute capcache_hard_limit_attribute =
+ __ATTR(hard_limit,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute capcache_reclaim_percent_attribute =
+ __ATTR(reclaim_percentage,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute capcache_soft_limit_attribute =
+ __ATTR(soft_limit,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute capcache_timeout_secs_attribute =
+ __ATTR(timeout_secs,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct attribute *capcache_orangefs_default_attrs[] = {
+ &capcache_hard_limit_attribute.attr,
+ &capcache_reclaim_percent_attribute.attr,
+ &capcache_soft_limit_attribute.attr,
+ &capcache_timeout_secs_attribute.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(capcache_orangefs_default);
+
+static struct kobject *capcache_orangefs_obj;
+
+static void capcache_orangefs_obj_release(struct kobject *kobj)
+{
+ kfree(capcache_orangefs_obj);
+ capcache_orangefs_obj = NULL;
+}
+
+static struct kobj_type capcache_orangefs_ktype = {
+ .sysfs_ops = &orangefs_sysfs_ops,
+ .default_groups = capcache_orangefs_default_groups,
+ .release = capcache_orangefs_obj_release,
+};
+
+static struct orangefs_attribute ccache_hard_limit_attribute =
+ __ATTR(hard_limit,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute ccache_reclaim_percent_attribute =
+ __ATTR(reclaim_percentage,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute ccache_soft_limit_attribute =
+ __ATTR(soft_limit,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute ccache_timeout_secs_attribute =
+ __ATTR(timeout_secs,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct attribute *ccache_orangefs_default_attrs[] = {
+ &ccache_hard_limit_attribute.attr,
+ &ccache_reclaim_percent_attribute.attr,
+ &ccache_soft_limit_attribute.attr,
+ &ccache_timeout_secs_attribute.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(ccache_orangefs_default);
+
+static struct kobject *ccache_orangefs_obj;
+
+static void ccache_orangefs_obj_release(struct kobject *kobj)
+{
+ kfree(ccache_orangefs_obj);
+ ccache_orangefs_obj = NULL;
+}
+
+static struct kobj_type ccache_orangefs_ktype = {
+ .sysfs_ops = &orangefs_sysfs_ops,
+ .default_groups = ccache_orangefs_default_groups,
+ .release = ccache_orangefs_obj_release,
+};
+
+static struct orangefs_attribute ncache_hard_limit_attribute =
+ __ATTR(hard_limit,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute ncache_reclaim_percent_attribute =
+ __ATTR(reclaim_percentage,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute ncache_soft_limit_attribute =
+ __ATTR(soft_limit,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct orangefs_attribute ncache_timeout_msecs_attribute =
+ __ATTR(timeout_msecs,
+ 0664,
+ sysfs_service_op_show,
+ sysfs_service_op_store);
+
+static struct attribute *ncache_orangefs_default_attrs[] = {
+ &ncache_hard_limit_attribute.attr,
+ &ncache_reclaim_percent_attribute.attr,
+ &ncache_soft_limit_attribute.attr,
+ &ncache_timeout_msecs_attribute.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(ncache_orangefs_default);
+
+static struct kobject *ncache_orangefs_obj;
+
+static void ncache_orangefs_obj_release(struct kobject *kobj)
+{
+ kfree(ncache_orangefs_obj);
+ ncache_orangefs_obj = NULL;
+}
+
+static struct kobj_type ncache_orangefs_ktype = {
+ .sysfs_ops = &orangefs_sysfs_ops,
+ .default_groups = ncache_orangefs_default_groups,
+ .release = ncache_orangefs_obj_release,
+};
+
+static struct orangefs_attribute pc_acache_attribute =
+ __ATTR(acache,
+ 0664,
+ sysfs_service_op_show,
+ NULL);
+
+static struct orangefs_attribute pc_capcache_attribute =
+ __ATTR(capcache,
+ 0664,
+ sysfs_service_op_show,
+ NULL);
+
+static struct orangefs_attribute pc_ncache_attribute =
+ __ATTR(ncache,
+ 0664,
+ sysfs_service_op_show,
+ NULL);
+
+static struct attribute *pc_orangefs_default_attrs[] = {
+ &pc_acache_attribute.attr,
+ &pc_capcache_attribute.attr,
+ &pc_ncache_attribute.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(pc_orangefs_default);
+
+static struct kobject *pc_orangefs_obj;
+
+static void pc_orangefs_obj_release(struct kobject *kobj)
+{
+ kfree(pc_orangefs_obj);
+ pc_orangefs_obj = NULL;
+}
+
+static struct kobj_type pc_orangefs_ktype = {
+ .sysfs_ops = &orangefs_sysfs_ops,
+ .default_groups = pc_orangefs_default_groups,
+ .release = pc_orangefs_obj_release,
+};
+
+static struct orangefs_attribute stats_reads_attribute =
+ __ATTR(reads,
+ 0664,
+ sysfs_int_show,
+ NULL);
+
+static struct orangefs_attribute stats_writes_attribute =
+ __ATTR(writes,
+ 0664,
+ sysfs_int_show,
+ NULL);
+
+static struct attribute *stats_orangefs_default_attrs[] = {
+ &stats_reads_attribute.attr,
+ &stats_writes_attribute.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(stats_orangefs_default);
+
+static struct kobject *stats_orangefs_obj;
+
+static void stats_orangefs_obj_release(struct kobject *kobj)
+{
+ kfree(stats_orangefs_obj);
+ stats_orangefs_obj = NULL;
+}
+
+static struct kobj_type stats_orangefs_ktype = {
+ .sysfs_ops = &orangefs_sysfs_ops,
+ .default_groups = stats_orangefs_default_groups,
+ .release = stats_orangefs_obj_release,
+};
+
+int orangefs_sysfs_init(void)
+{
+ int rc = -EINVAL;
+
+ gossip_debug(GOSSIP_SYSFS_DEBUG, "orangefs_sysfs_init: start\n");
+
+ /* create /sys/fs/orangefs. */
+ orangefs_obj = kzalloc(sizeof(*orangefs_obj), GFP_KERNEL);
+ if (!orangefs_obj)
+ goto out;
+
+ rc = kobject_init_and_add(orangefs_obj,
+ &orangefs_ktype,
+ fs_kobj,
+ ORANGEFS_KOBJ_ID);
+
+ if (rc)
+ goto ofs_obj_bail;
+
+ kobject_uevent(orangefs_obj, KOBJ_ADD);
+
+ /* create /sys/fs/orangefs/acache. */
+ acache_orangefs_obj = kzalloc(sizeof(*acache_orangefs_obj), GFP_KERNEL);
+ if (!acache_orangefs_obj) {
+ rc = -EINVAL;
+ goto ofs_obj_bail;
+ }
+
+ rc = kobject_init_and_add(acache_orangefs_obj,
+ &acache_orangefs_ktype,
+ orangefs_obj,
+ ACACHE_KOBJ_ID);
+
+ if (rc)
+ goto acache_obj_bail;
+
+ kobject_uevent(acache_orangefs_obj, KOBJ_ADD);
+
+ /* create /sys/fs/orangefs/capcache. */
+ capcache_orangefs_obj =
+ kzalloc(sizeof(*capcache_orangefs_obj), GFP_KERNEL);
+ if (!capcache_orangefs_obj) {
+ rc = -EINVAL;
+ goto acache_obj_bail;
+ }
+
+ rc = kobject_init_and_add(capcache_orangefs_obj,
+ &capcache_orangefs_ktype,
+ orangefs_obj,
+ CAPCACHE_KOBJ_ID);
+ if (rc)
+ goto capcache_obj_bail;
+
+ kobject_uevent(capcache_orangefs_obj, KOBJ_ADD);
+
+ /* create /sys/fs/orangefs/ccache. */
+ ccache_orangefs_obj =
+ kzalloc(sizeof(*ccache_orangefs_obj), GFP_KERNEL);
+ if (!ccache_orangefs_obj) {
+ rc = -EINVAL;
+ goto capcache_obj_bail;
+ }
+
+ rc = kobject_init_and_add(ccache_orangefs_obj,
+ &ccache_orangefs_ktype,
+ orangefs_obj,
+ CCACHE_KOBJ_ID);
+ if (rc)
+ goto ccache_obj_bail;
+
+ kobject_uevent(ccache_orangefs_obj, KOBJ_ADD);
+
+ /* create /sys/fs/orangefs/ncache. */
+ ncache_orangefs_obj = kzalloc(sizeof(*ncache_orangefs_obj), GFP_KERNEL);
+ if (!ncache_orangefs_obj) {
+ rc = -EINVAL;
+ goto ccache_obj_bail;
+ }
+
+ rc = kobject_init_and_add(ncache_orangefs_obj,
+ &ncache_orangefs_ktype,
+ orangefs_obj,
+ NCACHE_KOBJ_ID);
+
+ if (rc)
+ goto ncache_obj_bail;
+
+ kobject_uevent(ncache_orangefs_obj, KOBJ_ADD);
+
+ /* create /sys/fs/orangefs/perf_counters. */
+ pc_orangefs_obj = kzalloc(sizeof(*pc_orangefs_obj), GFP_KERNEL);
+ if (!pc_orangefs_obj) {
+ rc = -EINVAL;
+ goto ncache_obj_bail;
+ }
+
+ rc = kobject_init_and_add(pc_orangefs_obj,
+ &pc_orangefs_ktype,
+ orangefs_obj,
+ "perf_counters");
+
+ if (rc)
+ goto pc_obj_bail;
+
+ kobject_uevent(pc_orangefs_obj, KOBJ_ADD);
+
+ /* create /sys/fs/orangefs/stats. */
+ stats_orangefs_obj = kzalloc(sizeof(*stats_orangefs_obj), GFP_KERNEL);
+ if (!stats_orangefs_obj) {
+ rc = -EINVAL;
+ goto pc_obj_bail;
+ }
+
+ rc = kobject_init_and_add(stats_orangefs_obj,
+ &stats_orangefs_ktype,
+ orangefs_obj,
+ STATS_KOBJ_ID);
+
+ if (rc)
+ goto stats_obj_bail;
+
+ kobject_uevent(stats_orangefs_obj, KOBJ_ADD);
+ goto out;
+
+stats_obj_bail:
+ kobject_put(stats_orangefs_obj);
+pc_obj_bail:
+ kobject_put(pc_orangefs_obj);
+ncache_obj_bail:
+ kobject_put(ncache_orangefs_obj);
+ccache_obj_bail:
+ kobject_put(ccache_orangefs_obj);
+capcache_obj_bail:
+ kobject_put(capcache_orangefs_obj);
+acache_obj_bail:
+ kobject_put(acache_orangefs_obj);
+ofs_obj_bail:
+ kobject_put(orangefs_obj);
+out:
+ return rc;
+}
+
+void orangefs_sysfs_exit(void)
+{
+ gossip_debug(GOSSIP_SYSFS_DEBUG, "orangefs_sysfs_exit: start\n");
+ kobject_put(acache_orangefs_obj);
+ kobject_put(capcache_orangefs_obj);
+ kobject_put(ccache_orangefs_obj);
+ kobject_put(ncache_orangefs_obj);
+ kobject_put(pc_orangefs_obj);
+ kobject_put(stats_orangefs_obj);
+ kobject_put(orangefs_obj);
+}
diff --git a/fs/orangefs/orangefs-sysfs.h b/fs/orangefs/orangefs-sysfs.h
new file mode 100644
index 000000000..f0b76382d
--- /dev/null
+++ b/fs/orangefs/orangefs-sysfs.h
@@ -0,0 +1,2 @@
+extern int orangefs_sysfs_init(void);
+extern void orangefs_sysfs_exit(void);
diff --git a/fs/orangefs/orangefs-utils.c b/fs/orangefs/orangefs-utils.c
new file mode 100644
index 000000000..46b7dcff1
--- /dev/null
+++ b/fs/orangefs/orangefs-utils.c
@@ -0,0 +1,560 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
+ *
+ * See COPYING in top-level directory.
+ */
+#include <linux/kernel.h>
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-dev-proto.h"
+#include "orangefs-bufmap.h"
+
+__s32 fsid_of_op(struct orangefs_kernel_op_s *op)
+{
+ __s32 fsid = ORANGEFS_FS_ID_NULL;
+
+ if (op) {
+ switch (op->upcall.type) {
+ case ORANGEFS_VFS_OP_FILE_IO:
+ fsid = op->upcall.req.io.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_LOOKUP:
+ fsid = op->upcall.req.lookup.parent_refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_CREATE:
+ fsid = op->upcall.req.create.parent_refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_GETATTR:
+ fsid = op->upcall.req.getattr.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_REMOVE:
+ fsid = op->upcall.req.remove.parent_refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_MKDIR:
+ fsid = op->upcall.req.mkdir.parent_refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_READDIR:
+ fsid = op->upcall.req.readdir.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_SETATTR:
+ fsid = op->upcall.req.setattr.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_SYMLINK:
+ fsid = op->upcall.req.sym.parent_refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_RENAME:
+ fsid = op->upcall.req.rename.old_parent_refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_STATFS:
+ fsid = op->upcall.req.statfs.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_TRUNCATE:
+ fsid = op->upcall.req.truncate.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_RA_FLUSH:
+ fsid = op->upcall.req.ra_cache_flush.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_FS_UMOUNT:
+ fsid = op->upcall.req.fs_umount.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_GETXATTR:
+ fsid = op->upcall.req.getxattr.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_SETXATTR:
+ fsid = op->upcall.req.setxattr.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_LISTXATTR:
+ fsid = op->upcall.req.listxattr.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_REMOVEXATTR:
+ fsid = op->upcall.req.removexattr.refn.fs_id;
+ break;
+ case ORANGEFS_VFS_OP_FSYNC:
+ fsid = op->upcall.req.fsync.refn.fs_id;
+ break;
+ default:
+ break;
+ }
+ }
+ return fsid;
+}
+
+static int orangefs_inode_flags(struct ORANGEFS_sys_attr_s *attrs)
+{
+ int flags = 0;
+ if (attrs->flags & ORANGEFS_IMMUTABLE_FL)
+ flags |= S_IMMUTABLE;
+ else
+ flags &= ~S_IMMUTABLE;
+ if (attrs->flags & ORANGEFS_APPEND_FL)
+ flags |= S_APPEND;
+ else
+ flags &= ~S_APPEND;
+ if (attrs->flags & ORANGEFS_NOATIME_FL)
+ flags |= S_NOATIME;
+ else
+ flags &= ~S_NOATIME;
+ return flags;
+}
+
+static int orangefs_inode_perms(struct ORANGEFS_sys_attr_s *attrs)
+{
+ int perm_mode = 0;
+
+ if (attrs->perms & ORANGEFS_O_EXECUTE)
+ perm_mode |= S_IXOTH;
+ if (attrs->perms & ORANGEFS_O_WRITE)
+ perm_mode |= S_IWOTH;
+ if (attrs->perms & ORANGEFS_O_READ)
+ perm_mode |= S_IROTH;
+
+ if (attrs->perms & ORANGEFS_G_EXECUTE)
+ perm_mode |= S_IXGRP;
+ if (attrs->perms & ORANGEFS_G_WRITE)
+ perm_mode |= S_IWGRP;
+ if (attrs->perms & ORANGEFS_G_READ)
+ perm_mode |= S_IRGRP;
+
+ if (attrs->perms & ORANGEFS_U_EXECUTE)
+ perm_mode |= S_IXUSR;
+ if (attrs->perms & ORANGEFS_U_WRITE)
+ perm_mode |= S_IWUSR;
+ if (attrs->perms & ORANGEFS_U_READ)
+ perm_mode |= S_IRUSR;
+
+ if (attrs->perms & ORANGEFS_G_SGID)
+ perm_mode |= S_ISGID;
+ if (attrs->perms & ORANGEFS_U_SUID)
+ perm_mode |= S_ISUID;
+
+ return perm_mode;
+}
+
+/*
+ * NOTE: in kernel land, we never use the sys_attr->link_target for
+ * anything, so don't bother copying it into the sys_attr object here.
+ */
+static inline void copy_attributes_from_inode(struct inode *inode,
+ struct ORANGEFS_sys_attr_s *attrs)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ attrs->mask = 0;
+ if (orangefs_inode->attr_valid & ATTR_UID) {
+ attrs->owner = from_kuid(&init_user_ns, inode->i_uid);
+ attrs->mask |= ORANGEFS_ATTR_SYS_UID;
+ gossip_debug(GOSSIP_UTILS_DEBUG, "(UID) %d\n", attrs->owner);
+ }
+ if (orangefs_inode->attr_valid & ATTR_GID) {
+ attrs->group = from_kgid(&init_user_ns, inode->i_gid);
+ attrs->mask |= ORANGEFS_ATTR_SYS_GID;
+ gossip_debug(GOSSIP_UTILS_DEBUG, "(GID) %d\n", attrs->group);
+ }
+
+ if (orangefs_inode->attr_valid & ATTR_ATIME) {
+ attrs->mask |= ORANGEFS_ATTR_SYS_ATIME;
+ if (orangefs_inode->attr_valid & ATTR_ATIME_SET) {
+ attrs->atime = (time64_t)inode->i_atime.tv_sec;
+ attrs->mask |= ORANGEFS_ATTR_SYS_ATIME_SET;
+ }
+ }
+ if (orangefs_inode->attr_valid & ATTR_MTIME) {
+ attrs->mask |= ORANGEFS_ATTR_SYS_MTIME;
+ if (orangefs_inode->attr_valid & ATTR_MTIME_SET) {
+ attrs->mtime = (time64_t)inode->i_mtime.tv_sec;
+ attrs->mask |= ORANGEFS_ATTR_SYS_MTIME_SET;
+ }
+ }
+ if (orangefs_inode->attr_valid & ATTR_CTIME)
+ attrs->mask |= ORANGEFS_ATTR_SYS_CTIME;
+
+ /*
+ * ORANGEFS cannot set size with a setattr operation. Probably not
+ * likely to be requested through the VFS, but just in case, don't
+ * worry about ATTR_SIZE
+ */
+
+ if (orangefs_inode->attr_valid & ATTR_MODE) {
+ attrs->perms = ORANGEFS_util_translate_mode(inode->i_mode);
+ attrs->mask |= ORANGEFS_ATTR_SYS_PERM;
+ }
+}
+
+static int orangefs_inode_type(enum orangefs_ds_type objtype)
+{
+ if (objtype == ORANGEFS_TYPE_METAFILE)
+ return S_IFREG;
+ else if (objtype == ORANGEFS_TYPE_DIRECTORY)
+ return S_IFDIR;
+ else if (objtype == ORANGEFS_TYPE_SYMLINK)
+ return S_IFLNK;
+ else
+ return -1;
+}
+
+static void orangefs_make_bad_inode(struct inode *inode)
+{
+ if (is_root_handle(inode)) {
+ /*
+ * if this occurs, the pvfs2-client-core was killed but we
+ * can't afford to lose the inode operations and such
+ * associated with the root handle in any case.
+ */
+ gossip_debug(GOSSIP_UTILS_DEBUG,
+ "*** NOT making bad root inode %pU\n",
+ get_khandle_from_ino(inode));
+ } else {
+ gossip_debug(GOSSIP_UTILS_DEBUG,
+ "*** making bad inode %pU\n",
+ get_khandle_from_ino(inode));
+ make_bad_inode(inode);
+ }
+}
+
+static int orangefs_inode_is_stale(struct inode *inode,
+ struct ORANGEFS_sys_attr_s *attrs, char *link_target)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ int type = orangefs_inode_type(attrs->objtype);
+ /*
+ * If the inode type or symlink target have changed then this
+ * inode is stale.
+ */
+ if (type == -1 || inode_wrong_type(inode, type)) {
+ orangefs_make_bad_inode(inode);
+ return 1;
+ }
+ if (type == S_IFLNK && strncmp(orangefs_inode->link_target,
+ link_target, ORANGEFS_NAME_MAX)) {
+ orangefs_make_bad_inode(inode);
+ return 1;
+ }
+ return 0;
+}
+
+int orangefs_inode_getattr(struct inode *inode, int flags)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op;
+ loff_t inode_size;
+ int ret, type;
+
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU flags %d\n",
+ __func__, get_khandle_from_ino(inode), flags);
+
+again:
+ spin_lock(&inode->i_lock);
+ /* Must have all the attributes in the mask and be within cache time. */
+ if ((!flags && time_before(jiffies, orangefs_inode->getattr_time)) ||
+ orangefs_inode->attr_valid || inode->i_state & I_DIRTY_PAGES) {
+ if (orangefs_inode->attr_valid) {
+ spin_unlock(&inode->i_lock);
+ write_inode_now(inode, 1);
+ goto again;
+ }
+ spin_unlock(&inode->i_lock);
+ return 0;
+ }
+ spin_unlock(&inode->i_lock);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
+ if (!new_op)
+ return -ENOMEM;
+ new_op->upcall.req.getattr.refn = orangefs_inode->refn;
+ /*
+ * Size is the hardest attribute to get. The incremental cost of any
+ * other attribute is essentially zero.
+ */
+ if (flags)
+ new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
+ else
+ new_op->upcall.req.getattr.mask =
+ ORANGEFS_ATTR_SYS_ALL_NOHINT & ~ORANGEFS_ATTR_SYS_SIZE;
+
+ ret = service_operation(new_op, __func__,
+ get_interruptible_flag(inode));
+ if (ret != 0)
+ goto out;
+
+again2:
+ spin_lock(&inode->i_lock);
+ /* Must have all the attributes in the mask and be within cache time. */
+ if ((!flags && time_before(jiffies, orangefs_inode->getattr_time)) ||
+ orangefs_inode->attr_valid || inode->i_state & I_DIRTY_PAGES) {
+ if (orangefs_inode->attr_valid) {
+ spin_unlock(&inode->i_lock);
+ write_inode_now(inode, 1);
+ goto again2;
+ }
+ if (inode->i_state & I_DIRTY_PAGES) {
+ ret = 0;
+ goto out_unlock;
+ }
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: in cache or dirty\n",
+ __func__);
+ ret = 0;
+ goto out_unlock;
+ }
+
+ if (!(flags & ORANGEFS_GETATTR_NEW)) {
+ ret = orangefs_inode_is_stale(inode,
+ &new_op->downcall.resp.getattr.attributes,
+ new_op->downcall.resp.getattr.link_target);
+ if (ret) {
+ ret = -ESTALE;
+ goto out_unlock;
+ }
+ }
+
+ type = orangefs_inode_type(new_op->
+ downcall.resp.getattr.attributes.objtype);
+ switch (type) {
+ case S_IFREG:
+ inode->i_flags = orangefs_inode_flags(&new_op->
+ downcall.resp.getattr.attributes);
+ if (flags) {
+ inode_size = (loff_t)new_op->
+ downcall.resp.getattr.attributes.size;
+ inode->i_size = inode_size;
+ inode->i_blkbits = ffs(new_op->downcall.resp.getattr.
+ attributes.blksize);
+ inode->i_bytes = inode_size;
+ inode->i_blocks =
+ (inode_size + 512 - inode_size % 512)/512;
+ }
+ break;
+ case S_IFDIR:
+ if (flags) {
+ inode->i_size = PAGE_SIZE;
+ inode_set_bytes(inode, inode->i_size);
+ }
+ set_nlink(inode, 1);
+ break;
+ case S_IFLNK:
+ if (flags & ORANGEFS_GETATTR_NEW) {
+ inode->i_size = (loff_t)strlen(new_op->
+ downcall.resp.getattr.link_target);
+ ret = strscpy(orangefs_inode->link_target,
+ new_op->downcall.resp.getattr.link_target,
+ ORANGEFS_NAME_MAX);
+ if (ret == -E2BIG) {
+ ret = -EIO;
+ goto out_unlock;
+ }
+ inode->i_link = orangefs_inode->link_target;
+ }
+ break;
+ /* i.e. -1 */
+ default:
+ /* XXX: ESTALE? This is what is done if it is not new. */
+ orangefs_make_bad_inode(inode);
+ ret = -ESTALE;
+ goto out_unlock;
+ }
+
+ inode->i_uid = make_kuid(&init_user_ns, new_op->
+ downcall.resp.getattr.attributes.owner);
+ inode->i_gid = make_kgid(&init_user_ns, new_op->
+ downcall.resp.getattr.attributes.group);
+ inode->i_atime.tv_sec = (time64_t)new_op->
+ downcall.resp.getattr.attributes.atime;
+ inode->i_mtime.tv_sec = (time64_t)new_op->
+ downcall.resp.getattr.attributes.mtime;
+ inode->i_ctime.tv_sec = (time64_t)new_op->
+ downcall.resp.getattr.attributes.ctime;
+ inode->i_atime.tv_nsec = 0;
+ inode->i_mtime.tv_nsec = 0;
+ inode->i_ctime.tv_nsec = 0;
+
+ /* special case: mark the root inode as sticky */
+ inode->i_mode = type | (is_root_handle(inode) ? S_ISVTX : 0) |
+ orangefs_inode_perms(&new_op->downcall.resp.getattr.attributes);
+
+ orangefs_inode->getattr_time = jiffies +
+ orangefs_getattr_timeout_msecs*HZ/1000;
+ ret = 0;
+out_unlock:
+ spin_unlock(&inode->i_lock);
+out:
+ op_release(new_op);
+ return ret;
+}
+
+int orangefs_inode_check_changed(struct inode *inode)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op;
+ int ret;
+
+ gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
+ get_khandle_from_ino(inode));
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
+ if (!new_op)
+ return -ENOMEM;
+ new_op->upcall.req.getattr.refn = orangefs_inode->refn;
+ new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_TYPE |
+ ORANGEFS_ATTR_SYS_LNK_TARGET;
+
+ ret = service_operation(new_op, __func__,
+ get_interruptible_flag(inode));
+ if (ret != 0)
+ goto out;
+
+ ret = orangefs_inode_is_stale(inode,
+ &new_op->downcall.resp.getattr.attributes,
+ new_op->downcall.resp.getattr.link_target);
+out:
+ op_release(new_op);
+ return ret;
+}
+
+/*
+ * issues a orangefs setattr request to make sure the new attribute values
+ * take effect if successful. returns 0 on success; -errno otherwise
+ */
+int orangefs_inode_setattr(struct inode *inode)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op;
+ int ret;
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_SETATTR);
+ if (!new_op)
+ return -ENOMEM;
+
+ spin_lock(&inode->i_lock);
+ new_op->upcall.uid = from_kuid(&init_user_ns, orangefs_inode->attr_uid);
+ new_op->upcall.gid = from_kgid(&init_user_ns, orangefs_inode->attr_gid);
+ new_op->upcall.req.setattr.refn = orangefs_inode->refn;
+ copy_attributes_from_inode(inode,
+ &new_op->upcall.req.setattr.attributes);
+ orangefs_inode->attr_valid = 0;
+ if (!new_op->upcall.req.setattr.attributes.mask) {
+ spin_unlock(&inode->i_lock);
+ op_release(new_op);
+ return 0;
+ }
+ spin_unlock(&inode->i_lock);
+
+ ret = service_operation(new_op, __func__,
+ get_interruptible_flag(inode) | ORANGEFS_OP_WRITEBACK);
+ gossip_debug(GOSSIP_UTILS_DEBUG,
+ "orangefs_inode_setattr: returning %d\n", ret);
+ if (ret)
+ orangefs_make_bad_inode(inode);
+
+ op_release(new_op);
+
+ if (ret == 0)
+ orangefs_inode->getattr_time = jiffies - 1;
+ return ret;
+}
+
+/*
+ * The following is a very dirty hack that is now a permanent part of the
+ * ORANGEFS protocol. See protocol.h for more error definitions.
+ */
+
+/* The order matches include/orangefs-types.h in the OrangeFS source. */
+static int PINT_errno_mapping[] = {
+ 0, EPERM, ENOENT, EINTR, EIO, ENXIO, EBADF, EAGAIN, ENOMEM,
+ EFAULT, EBUSY, EEXIST, ENODEV, ENOTDIR, EISDIR, EINVAL, EMFILE,
+ EFBIG, ENOSPC, EROFS, EMLINK, EPIPE, EDEADLK, ENAMETOOLONG,
+ ENOLCK, ENOSYS, ENOTEMPTY, ELOOP, EWOULDBLOCK, ENOMSG, EUNATCH,
+ EBADR, EDEADLOCK, ENODATA, ETIME, ENONET, EREMOTE, ECOMM,
+ EPROTO, EBADMSG, EOVERFLOW, ERESTART, EMSGSIZE, EPROTOTYPE,
+ ENOPROTOOPT, EPROTONOSUPPORT, EOPNOTSUPP, EADDRINUSE,
+ EADDRNOTAVAIL, ENETDOWN, ENETUNREACH, ENETRESET, ENOBUFS,
+ ETIMEDOUT, ECONNREFUSED, EHOSTDOWN, EHOSTUNREACH, EALREADY,
+ EACCES, ECONNRESET, ERANGE
+};
+
+int orangefs_normalize_to_errno(__s32 error_code)
+{
+ __u32 i;
+
+ /* Success */
+ if (error_code == 0) {
+ return 0;
+ /*
+ * This shouldn't ever happen. If it does it should be fixed on the
+ * server.
+ */
+ } else if (error_code > 0) {
+ gossip_err("orangefs: error status received.\n");
+ gossip_err("orangefs: assuming error code is inverted.\n");
+ error_code = -error_code;
+ }
+
+ /*
+ * XXX: This is very bad since error codes from ORANGEFS may not be
+ * suitable for return into userspace.
+ */
+
+ /*
+ * Convert ORANGEFS error values into errno values suitable for return
+ * from the kernel.
+ */
+ if ((-error_code) & ORANGEFS_NON_ERRNO_ERROR_BIT) {
+ if (((-error_code) &
+ (ORANGEFS_ERROR_NUMBER_BITS|ORANGEFS_NON_ERRNO_ERROR_BIT|
+ ORANGEFS_ERROR_BIT)) == ORANGEFS_ECANCEL) {
+ /*
+ * cancellation error codes generally correspond to
+ * a timeout from the client's perspective
+ */
+ error_code = -ETIMEDOUT;
+ } else {
+ /* assume a default error code */
+ gossip_err("%s: bad error code :%d:.\n",
+ __func__,
+ error_code);
+ error_code = -EINVAL;
+ }
+
+ /* Convert ORANGEFS encoded errno values into regular errno values. */
+ } else if ((-error_code) & ORANGEFS_ERROR_BIT) {
+ i = (-error_code) & ~(ORANGEFS_ERROR_BIT|ORANGEFS_ERROR_CLASS_BITS);
+ if (i < ARRAY_SIZE(PINT_errno_mapping))
+ error_code = -PINT_errno_mapping[i];
+ else
+ error_code = -EINVAL;
+
+ /*
+ * Only ORANGEFS protocol error codes should ever come here. Otherwise
+ * there is a bug somewhere.
+ */
+ } else {
+ gossip_err("%s: unknown error code.\n", __func__);
+ error_code = -EINVAL;
+ }
+ return error_code;
+}
+
+#define NUM_MODES 11
+__s32 ORANGEFS_util_translate_mode(int mode)
+{
+ int ret = 0;
+ int i = 0;
+ static int modes[NUM_MODES] = {
+ S_IXOTH, S_IWOTH, S_IROTH,
+ S_IXGRP, S_IWGRP, S_IRGRP,
+ S_IXUSR, S_IWUSR, S_IRUSR,
+ S_ISGID, S_ISUID
+ };
+ static int orangefs_modes[NUM_MODES] = {
+ ORANGEFS_O_EXECUTE, ORANGEFS_O_WRITE, ORANGEFS_O_READ,
+ ORANGEFS_G_EXECUTE, ORANGEFS_G_WRITE, ORANGEFS_G_READ,
+ ORANGEFS_U_EXECUTE, ORANGEFS_U_WRITE, ORANGEFS_U_READ,
+ ORANGEFS_G_SGID, ORANGEFS_U_SUID
+ };
+
+ for (i = 0; i < NUM_MODES; i++)
+ if (mode & modes[i])
+ ret |= orangefs_modes[i];
+
+ return ret;
+}
+#undef NUM_MODES
diff --git a/fs/orangefs/protocol.h b/fs/orangefs/protocol.h
new file mode 100644
index 000000000..d403cf29a
--- /dev/null
+++ b/fs/orangefs/protocol.h
@@ -0,0 +1,362 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/spinlock_types.h>
+#include <linux/slab.h>
+#include <linux/ioctl.h>
+
+/* khandle stuff ***********************************************************/
+
+/*
+ * The 2.9 core will put 64 bit handles in here like this:
+ * 1234 0000 0000 5678
+ * The 3.0 and beyond cores will put 128 bit handles in here like this:
+ * 1234 5678 90AB CDEF
+ * The kernel module will always use the first four bytes and
+ * the last four bytes as an inum.
+ */
+struct orangefs_khandle {
+ unsigned char u[16];
+} __aligned(8);
+
+/*
+ * kernel version of an object ref.
+ */
+struct orangefs_object_kref {
+ struct orangefs_khandle khandle;
+ __s32 fs_id;
+ __s32 __pad1;
+};
+
+/*
+ * compare 2 khandles assumes little endian thus from large address to
+ * small address
+ */
+static inline int ORANGEFS_khandle_cmp(const struct orangefs_khandle *kh1,
+ const struct orangefs_khandle *kh2)
+{
+ int i;
+
+ for (i = 15; i >= 0; i--) {
+ if (kh1->u[i] > kh2->u[i])
+ return 1;
+ if (kh1->u[i] < kh2->u[i])
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline void ORANGEFS_khandle_to(const struct orangefs_khandle *kh,
+ void *p, int size)
+{
+
+ memcpy(p, kh->u, 16);
+ memset(p + 16, 0, size - 16);
+
+}
+
+static inline void ORANGEFS_khandle_from(struct orangefs_khandle *kh,
+ void *p, int size)
+{
+ memset(kh, 0, 16);
+ memcpy(kh->u, p, 16);
+
+}
+
+/* pvfs2-types.h ************************************************************/
+
+#define ORANGEFS_SUPER_MAGIC 0x20030528
+
+/*
+ * ORANGEFS error codes are a signed 32-bit integer. Error codes are negative, but
+ * the sign is stripped before decoding.
+ */
+
+/* Bit 31 is not used since it is the sign. */
+
+/*
+ * Bit 30 specifies that this is a ORANGEFS error. A ORANGEFS error is either an
+ * encoded errno value or a ORANGEFS protocol error.
+ */
+#define ORANGEFS_ERROR_BIT (1 << 30)
+
+/*
+ * Bit 29 specifies that this is a ORANGEFS protocol error and not an encoded
+ * errno value.
+ */
+#define ORANGEFS_NON_ERRNO_ERROR_BIT (1 << 29)
+
+/*
+ * Bits 9, 8, and 7 specify the error class, which encodes the section of
+ * server code the error originated in for logging purposes. It is not used
+ * in the kernel except to be masked out.
+ */
+#define ORANGEFS_ERROR_CLASS_BITS 0x380
+
+/* Bits 6 - 0 are reserved for the actual error code. */
+#define ORANGEFS_ERROR_NUMBER_BITS 0x7f
+
+/* Encoded errno values decoded by PINT_errno_mapping in orangefs-utils.c. */
+
+/* Our own ORANGEFS protocol error codes. */
+#define ORANGEFS_ECANCEL (1|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_EDEVINIT (2|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_EDETAIL (3|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_EHOSTNTFD (4|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_EADDRNTFD (5|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_ENORECVR (6|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_ETRYAGAIN (7|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_ENOTPVFS (8|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_ESECURITY (9|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+
+/* permission bits */
+#define ORANGEFS_O_EXECUTE (1 << 0)
+#define ORANGEFS_O_WRITE (1 << 1)
+#define ORANGEFS_O_READ (1 << 2)
+#define ORANGEFS_G_EXECUTE (1 << 3)
+#define ORANGEFS_G_WRITE (1 << 4)
+#define ORANGEFS_G_READ (1 << 5)
+#define ORANGEFS_U_EXECUTE (1 << 6)
+#define ORANGEFS_U_WRITE (1 << 7)
+#define ORANGEFS_U_READ (1 << 8)
+/* no ORANGEFS_U_VTX (sticky bit) */
+#define ORANGEFS_G_SGID (1 << 10)
+#define ORANGEFS_U_SUID (1 << 11)
+
+#define ORANGEFS_ITERATE_START 2147483646
+#define ORANGEFS_ITERATE_END 2147483645
+#define ORANGEFS_IMMUTABLE_FL FS_IMMUTABLE_FL
+#define ORANGEFS_APPEND_FL FS_APPEND_FL
+#define ORANGEFS_NOATIME_FL FS_NOATIME_FL
+#define ORANGEFS_MIRROR_FL 0x01000000ULL
+#define ORANGEFS_FS_ID_NULL ((__s32)0)
+#define ORANGEFS_ATTR_SYS_UID (1 << 0)
+#define ORANGEFS_ATTR_SYS_GID (1 << 1)
+#define ORANGEFS_ATTR_SYS_PERM (1 << 2)
+#define ORANGEFS_ATTR_SYS_ATIME (1 << 3)
+#define ORANGEFS_ATTR_SYS_CTIME (1 << 4)
+#define ORANGEFS_ATTR_SYS_MTIME (1 << 5)
+#define ORANGEFS_ATTR_SYS_TYPE (1 << 6)
+#define ORANGEFS_ATTR_SYS_ATIME_SET (1 << 7)
+#define ORANGEFS_ATTR_SYS_MTIME_SET (1 << 8)
+#define ORANGEFS_ATTR_SYS_SIZE (1 << 20)
+#define ORANGEFS_ATTR_SYS_LNK_TARGET (1 << 24)
+#define ORANGEFS_ATTR_SYS_DFILE_COUNT (1 << 25)
+#define ORANGEFS_ATTR_SYS_DIRENT_COUNT (1 << 26)
+#define ORANGEFS_ATTR_SYS_BLKSIZE (1 << 28)
+#define ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT (1 << 29)
+#define ORANGEFS_ATTR_SYS_COMMON_ALL \
+ (ORANGEFS_ATTR_SYS_UID | \
+ ORANGEFS_ATTR_SYS_GID | \
+ ORANGEFS_ATTR_SYS_PERM | \
+ ORANGEFS_ATTR_SYS_ATIME | \
+ ORANGEFS_ATTR_SYS_CTIME | \
+ ORANGEFS_ATTR_SYS_MTIME | \
+ ORANGEFS_ATTR_SYS_TYPE)
+
+#define ORANGEFS_ATTR_SYS_ALL_SETABLE \
+(ORANGEFS_ATTR_SYS_COMMON_ALL-ORANGEFS_ATTR_SYS_TYPE)
+
+#define ORANGEFS_ATTR_SYS_ALL_NOHINT \
+ (ORANGEFS_ATTR_SYS_COMMON_ALL | \
+ ORANGEFS_ATTR_SYS_SIZE | \
+ ORANGEFS_ATTR_SYS_LNK_TARGET | \
+ ORANGEFS_ATTR_SYS_DFILE_COUNT | \
+ ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT | \
+ ORANGEFS_ATTR_SYS_DIRENT_COUNT | \
+ ORANGEFS_ATTR_SYS_BLKSIZE)
+
+#define ORANGEFS_XATTR_REPLACE 0x2
+#define ORANGEFS_XATTR_CREATE 0x1
+#define ORANGEFS_MAX_SERVER_ADDR_LEN 256
+#define ORANGEFS_NAME_MAX 256
+/*
+ * max extended attribute name len as imposed by the VFS and exploited for the
+ * upcall request types.
+ * NOTE: Please retain them as multiples of 8 even if you wish to change them
+ * This is *NECESSARY* for supporting 32 bit user-space binaries on a 64-bit
+ * kernel. Due to implementation within DBPF, this really needs to be
+ * ORANGEFS_NAME_MAX, which it was the same value as, but no reason to let it
+ * break if that changes in the future.
+ */
+#define ORANGEFS_MAX_XATTR_NAMELEN ORANGEFS_NAME_MAX /* Not the same as
+ * XATTR_NAME_MAX defined
+ * by <linux/xattr.h>
+ */
+#define ORANGEFS_MAX_XATTR_VALUELEN 8192 /* Not the same as XATTR_SIZE_MAX
+ * defined by <linux/xattr.h>
+ */
+#define ORANGEFS_MAX_XATTR_LISTLEN 16 /* Not the same as XATTR_LIST_MAX
+ * defined by <linux/xattr.h>
+ */
+/*
+ * ORANGEFS I/O operation types, used in both system and server interfaces.
+ */
+enum ORANGEFS_io_type {
+ ORANGEFS_IO_READ = 1,
+ ORANGEFS_IO_WRITE = 2
+};
+
+/*
+ * If this enum is modified the server parameters related to the precreate pool
+ * batch and low threshold sizes may need to be modified to reflect this
+ * change.
+ */
+enum orangefs_ds_type {
+ ORANGEFS_TYPE_NONE = 0,
+ ORANGEFS_TYPE_METAFILE = (1 << 0),
+ ORANGEFS_TYPE_DATAFILE = (1 << 1),
+ ORANGEFS_TYPE_DIRECTORY = (1 << 2),
+ ORANGEFS_TYPE_SYMLINK = (1 << 3),
+ ORANGEFS_TYPE_DIRDATA = (1 << 4),
+ ORANGEFS_TYPE_INTERNAL = (1 << 5) /* for the server's private use */
+};
+
+/* This structure is used by the VFS-client interaction alone */
+struct ORANGEFS_keyval_pair {
+ char key[ORANGEFS_MAX_XATTR_NAMELEN];
+ __s32 key_sz; /* __s32 for portable, fixed-size structures */
+ __s32 val_sz;
+ char val[ORANGEFS_MAX_XATTR_VALUELEN];
+};
+
+/* pvfs2-sysint.h ***********************************************************/
+/* Describes attributes for a file, directory, or symlink. */
+struct ORANGEFS_sys_attr_s {
+ __u32 owner;
+ __u32 group;
+ __u32 perms;
+ __u64 atime;
+ __u64 mtime;
+ __u64 ctime;
+ __s64 size;
+
+ /* NOTE: caller must free if valid */
+ char *link_target;
+
+ /* Changed to __s32 so that size of structure does not change */
+ __s32 dfile_count;
+
+ /* Changed to __s32 so that size of structure does not change */
+ __s32 distr_dir_servers_initial;
+
+ /* Changed to __s32 so that size of structure does not change */
+ __s32 distr_dir_servers_max;
+
+ /* Changed to __s32 so that size of structure does not change */
+ __s32 distr_dir_split_size;
+
+ __u32 mirror_copies_count;
+
+ /* NOTE: caller must free if valid */
+ char *dist_name;
+
+ /* NOTE: caller must free if valid */
+ char *dist_params;
+
+ __s64 dirent_count;
+ enum orangefs_ds_type objtype;
+ __u64 flags;
+ __u32 mask;
+ __s64 blksize;
+};
+
+#define ORANGEFS_LOOKUP_LINK_NO_FOLLOW 0
+
+/* pint-dev.h ***************************************************************/
+
+/* parameter structure used in ORANGEFS_DEV_DEBUG ioctl command */
+struct dev_mask_info_s {
+ enum {
+ KERNEL_MASK,
+ CLIENT_MASK,
+ } mask_type;
+ __u64 mask_value;
+};
+
+struct dev_mask2_info_s {
+ __u64 mask1_value;
+ __u64 mask2_value;
+};
+
+/* pvfs2-util.h *************************************************************/
+__s32 ORANGEFS_util_translate_mode(int mode);
+
+/* pvfs2-debug.h ************************************************************/
+#include "orangefs-debug.h"
+
+/* pvfs2-internal.h *********************************************************/
+#define llu(x) (unsigned long long)(x)
+#define lld(x) (long long)(x)
+
+/* pint-dev-shared.h ********************************************************/
+#define ORANGEFS_DEV_MAGIC 'k'
+
+#define ORANGEFS_READDIR_DEFAULT_DESC_COUNT 5
+
+#define DEV_GET_MAGIC 0x1
+#define DEV_GET_MAX_UPSIZE 0x2
+#define DEV_GET_MAX_DOWNSIZE 0x3
+#define DEV_MAP 0x4
+#define DEV_REMOUNT_ALL 0x5
+#define DEV_DEBUG 0x6
+#define DEV_UPSTREAM 0x7
+#define DEV_CLIENT_MASK 0x8
+#define DEV_CLIENT_STRING 0x9
+#define DEV_MAX_NR 0xa
+
+/* supported ioctls, codes are with respect to user-space */
+enum {
+ ORANGEFS_DEV_GET_MAGIC = _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAGIC, __s32),
+ ORANGEFS_DEV_GET_MAX_UPSIZE =
+ _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_UPSIZE, __s32),
+ ORANGEFS_DEV_GET_MAX_DOWNSIZE =
+ _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_DOWNSIZE, __s32),
+ ORANGEFS_DEV_MAP = _IO(ORANGEFS_DEV_MAGIC, DEV_MAP),
+ ORANGEFS_DEV_REMOUNT_ALL = _IO(ORANGEFS_DEV_MAGIC, DEV_REMOUNT_ALL),
+ ORANGEFS_DEV_DEBUG = _IOR(ORANGEFS_DEV_MAGIC, DEV_DEBUG, __s32),
+ ORANGEFS_DEV_UPSTREAM = _IOW(ORANGEFS_DEV_MAGIC, DEV_UPSTREAM, int),
+ ORANGEFS_DEV_CLIENT_MASK = _IOW(ORANGEFS_DEV_MAGIC,
+ DEV_CLIENT_MASK,
+ struct dev_mask2_info_s),
+ ORANGEFS_DEV_CLIENT_STRING = _IOW(ORANGEFS_DEV_MAGIC,
+ DEV_CLIENT_STRING,
+ char *),
+ ORANGEFS_DEV_MAXNR = DEV_MAX_NR,
+};
+
+/*
+ * version number for use in communicating between kernel space and user
+ * space. Zero signifies the upstream version of the kernel module.
+ */
+#define ORANGEFS_KERNEL_PROTO_VERSION 0
+#define ORANGEFS_MINIMUM_USERSPACE_VERSION 20903
+
+/*
+ * describes memory regions to map in the ORANGEFS_DEV_MAP ioctl.
+ * NOTE: See devorangefs-req.c for 32 bit compat structure.
+ * Since this structure has a variable-sized layout that is different
+ * on 32 and 64 bit platforms, we need to normalize to a 64 bit layout
+ * on such systems before servicing ioctl calls from user-space binaries
+ * that may be 32 bit!
+ */
+struct ORANGEFS_dev_map_desc {
+ void __user *ptr;
+ __s32 total_size;
+ __s32 size;
+ __s32 count;
+};
+
+/* gossip.h *****************************************************************/
+
+extern __u64 orangefs_gossip_debug_mask;
+
+/* try to avoid function call overhead by checking masks in macro */
+#define gossip_debug(mask, fmt, ...) \
+do { \
+ if (orangefs_gossip_debug_mask & (mask)) \
+ printk(KERN_DEBUG fmt, ##__VA_ARGS__); \
+} while (0)
+
+#define gossip_err pr_err
diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c
new file mode 100644
index 000000000..5254256a2
--- /dev/null
+++ b/fs/orangefs/super.c
@@ -0,0 +1,665 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+#include <linux/parser.h>
+#include <linux/hashtable.h>
+#include <linux/seq_file.h>
+
+/* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
+static struct kmem_cache *orangefs_inode_cache;
+
+/* list for storing orangefs specific superblocks in use */
+LIST_HEAD(orangefs_superblocks);
+
+DEFINE_SPINLOCK(orangefs_superblocks_lock);
+
+enum {
+ Opt_intr,
+ Opt_acl,
+ Opt_local_lock,
+
+ Opt_err
+};
+
+static const match_table_t tokens = {
+ { Opt_acl, "acl" },
+ { Opt_intr, "intr" },
+ { Opt_local_lock, "local_lock" },
+ { Opt_err, NULL }
+};
+
+uint64_t orangefs_features;
+
+static int orangefs_show_options(struct seq_file *m, struct dentry *root)
+{
+ struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(root->d_sb);
+
+ if (root->d_sb->s_flags & SB_POSIXACL)
+ seq_puts(m, ",acl");
+ if (orangefs_sb->flags & ORANGEFS_OPT_INTR)
+ seq_puts(m, ",intr");
+ if (orangefs_sb->flags & ORANGEFS_OPT_LOCAL_LOCK)
+ seq_puts(m, ",local_lock");
+ return 0;
+}
+
+static int parse_mount_options(struct super_block *sb, char *options,
+ int silent)
+{
+ struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(sb);
+ substring_t args[MAX_OPT_ARGS];
+ char *p;
+
+ /*
+ * Force any potential flags that might be set from the mount
+ * to zero, ie, initialize to unset.
+ */
+ sb->s_flags &= ~SB_POSIXACL;
+ orangefs_sb->flags &= ~ORANGEFS_OPT_INTR;
+ orangefs_sb->flags &= ~ORANGEFS_OPT_LOCAL_LOCK;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_acl:
+ sb->s_flags |= SB_POSIXACL;
+ break;
+ case Opt_intr:
+ orangefs_sb->flags |= ORANGEFS_OPT_INTR;
+ break;
+ case Opt_local_lock:
+ orangefs_sb->flags |= ORANGEFS_OPT_LOCAL_LOCK;
+ break;
+ default:
+ goto fail;
+ }
+ }
+
+ return 0;
+fail:
+ if (!silent)
+ gossip_err("Error: mount option [%s] is not supported.\n", p);
+ return -EINVAL;
+}
+
+static void orangefs_inode_cache_ctor(void *req)
+{
+ struct orangefs_inode_s *orangefs_inode = req;
+
+ inode_init_once(&orangefs_inode->vfs_inode);
+ init_rwsem(&orangefs_inode->xattr_sem);
+}
+
+static struct inode *orangefs_alloc_inode(struct super_block *sb)
+{
+ struct orangefs_inode_s *orangefs_inode;
+
+ orangefs_inode = alloc_inode_sb(sb, orangefs_inode_cache, GFP_KERNEL);
+ if (!orangefs_inode)
+ return NULL;
+
+ /*
+ * We want to clear everything except for rw_semaphore and the
+ * vfs_inode.
+ */
+ memset(&orangefs_inode->refn.khandle, 0, 16);
+ orangefs_inode->refn.fs_id = ORANGEFS_FS_ID_NULL;
+ orangefs_inode->last_failed_block_index_read = 0;
+ memset(orangefs_inode->link_target, 0, sizeof(orangefs_inode->link_target));
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "orangefs_alloc_inode: allocated %p\n",
+ &orangefs_inode->vfs_inode);
+ return &orangefs_inode->vfs_inode;
+}
+
+static void orangefs_free_inode(struct inode *inode)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_cached_xattr *cx;
+ struct hlist_node *tmp;
+ int i;
+
+ hash_for_each_safe(orangefs_inode->xattr_cache, i, tmp, cx, node) {
+ hlist_del(&cx->node);
+ kfree(cx);
+ }
+
+ kmem_cache_free(orangefs_inode_cache, orangefs_inode);
+}
+
+static void orangefs_destroy_inode(struct inode *inode)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "%s: deallocated %p destroying inode %pU\n",
+ __func__, orangefs_inode, get_khandle_from_ino(inode));
+}
+
+static int orangefs_write_inode(struct inode *inode,
+ struct writeback_control *wbc)
+{
+ gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_write_inode\n");
+ return orangefs_inode_setattr(inode);
+}
+
+/*
+ * NOTE: information filled in here is typically reflected in the
+ * output of the system command 'df'
+*/
+static int orangefs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ int ret = -ENOMEM;
+ struct orangefs_kernel_op_s *new_op = NULL;
+ int flags = 0;
+ struct super_block *sb = NULL;
+
+ sb = dentry->d_sb;
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "%s: called on sb %p (fs_id is %d)\n",
+ __func__,
+ sb,
+ (int)(ORANGEFS_SB(sb)->fs_id));
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_STATFS);
+ if (!new_op)
+ return ret;
+ new_op->upcall.req.statfs.fs_id = ORANGEFS_SB(sb)->fs_id;
+
+ if (ORANGEFS_SB(sb)->flags & ORANGEFS_OPT_INTR)
+ flags = ORANGEFS_OP_INTERRUPTIBLE;
+
+ ret = service_operation(new_op, "orangefs_statfs", flags);
+
+ if (new_op->downcall.status < 0)
+ goto out_op_release;
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "%s: got %ld blocks available | "
+ "%ld blocks total | %ld block size | "
+ "%ld files total | %ld files avail\n",
+ __func__,
+ (long)new_op->downcall.resp.statfs.blocks_avail,
+ (long)new_op->downcall.resp.statfs.blocks_total,
+ (long)new_op->downcall.resp.statfs.block_size,
+ (long)new_op->downcall.resp.statfs.files_total,
+ (long)new_op->downcall.resp.statfs.files_avail);
+
+ buf->f_type = sb->s_magic;
+ memcpy(&buf->f_fsid, &ORANGEFS_SB(sb)->fs_id, sizeof(buf->f_fsid));
+ buf->f_bsize = new_op->downcall.resp.statfs.block_size;
+ buf->f_namelen = ORANGEFS_NAME_MAX;
+
+ buf->f_blocks = (sector_t) new_op->downcall.resp.statfs.blocks_total;
+ buf->f_bfree = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
+ buf->f_bavail = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
+ buf->f_files = (sector_t) new_op->downcall.resp.statfs.files_total;
+ buf->f_ffree = (sector_t) new_op->downcall.resp.statfs.files_avail;
+ buf->f_frsize = 0;
+
+out_op_release:
+ op_release(new_op);
+ gossip_debug(GOSSIP_SUPER_DEBUG, "%s: returning %d\n", __func__, ret);
+ return ret;
+}
+
+/*
+ * Remount as initiated by VFS layer. We just need to reparse the mount
+ * options, no need to signal pvfs2-client-core about it.
+ */
+static int orangefs_remount_fs(struct super_block *sb, int *flags, char *data)
+{
+ gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount_fs: called\n");
+ return parse_mount_options(sb, data, 1);
+}
+
+/*
+ * Remount as initiated by pvfs2-client-core on restart. This is used to
+ * repopulate mount information left from previous pvfs2-client-core.
+ *
+ * the idea here is that given a valid superblock, we're
+ * re-initializing the user space client with the initial mount
+ * information specified when the super block was first initialized.
+ * this is very different than the first initialization/creation of a
+ * superblock. we use the special service_priority_operation to make
+ * sure that the mount gets ahead of any other pending operation that
+ * is waiting for servicing. this means that the pvfs2-client won't
+ * fail to start several times for all other pending operations before
+ * the client regains all of the mount information from us.
+ * NOTE: this function assumes that the request_mutex is already acquired!
+ */
+int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb)
+{
+ struct orangefs_kernel_op_s *new_op;
+ int ret = -EINVAL;
+
+ gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount: called\n");
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
+ if (!new_op)
+ return -ENOMEM;
+ strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
+ orangefs_sb->devname,
+ ORANGEFS_MAX_SERVER_ADDR_LEN);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Attempting ORANGEFS Remount via host %s\n",
+ new_op->upcall.req.fs_mount.orangefs_config_server);
+
+ /*
+ * we assume that the calling function has already acquired the
+ * request_mutex to prevent other operations from bypassing
+ * this one
+ */
+ ret = service_operation(new_op, "orangefs_remount",
+ ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "orangefs_remount: mount got return value of %d\n",
+ ret);
+ if (ret == 0) {
+ /*
+ * store the id assigned to this sb -- it's just a
+ * short-lived mapping that the system interface uses
+ * to map this superblock to a particular mount entry
+ */
+ orangefs_sb->id = new_op->downcall.resp.fs_mount.id;
+ orangefs_sb->mount_pending = 0;
+ }
+
+ op_release(new_op);
+
+ if (orangefs_userspace_version >= 20906) {
+ new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
+ if (!new_op)
+ return -ENOMEM;
+ new_op->upcall.req.features.features = 0;
+ ret = service_operation(new_op, "orangefs_features",
+ ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
+ if (!ret)
+ orangefs_features =
+ new_op->downcall.resp.features.features;
+ else
+ orangefs_features = 0;
+ op_release(new_op);
+ } else {
+ orangefs_features = 0;
+ }
+
+ return ret;
+}
+
+int fsid_key_table_initialize(void)
+{
+ return 0;
+}
+
+void fsid_key_table_finalize(void)
+{
+}
+
+static const struct super_operations orangefs_s_ops = {
+ .alloc_inode = orangefs_alloc_inode,
+ .free_inode = orangefs_free_inode,
+ .destroy_inode = orangefs_destroy_inode,
+ .write_inode = orangefs_write_inode,
+ .drop_inode = generic_delete_inode,
+ .statfs = orangefs_statfs,
+ .remount_fs = orangefs_remount_fs,
+ .show_options = orangefs_show_options,
+};
+
+static struct dentry *orangefs_fh_to_dentry(struct super_block *sb,
+ struct fid *fid,
+ int fh_len,
+ int fh_type)
+{
+ struct orangefs_object_kref refn;
+
+ if (fh_len < 5 || fh_type > 2)
+ return NULL;
+
+ ORANGEFS_khandle_from(&(refn.khandle), fid->raw, 16);
+ refn.fs_id = (u32) fid->raw[4];
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "fh_to_dentry: handle %pU, fs_id %d\n",
+ &refn.khandle,
+ refn.fs_id);
+
+ return d_obtain_alias(orangefs_iget(sb, &refn));
+}
+
+static int orangefs_encode_fh(struct inode *inode,
+ __u32 *fh,
+ int *max_len,
+ struct inode *parent)
+{
+ int len = parent ? 10 : 5;
+ int type = 1;
+ struct orangefs_object_kref refn;
+
+ if (*max_len < len) {
+ gossip_err("fh buffer is too small for encoding\n");
+ *max_len = len;
+ type = 255;
+ goto out;
+ }
+
+ refn = ORANGEFS_I(inode)->refn;
+ ORANGEFS_khandle_to(&refn.khandle, fh, 16);
+ fh[4] = refn.fs_id;
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Encoding fh: handle %pU, fsid %u\n",
+ &refn.khandle,
+ refn.fs_id);
+
+
+ if (parent) {
+ refn = ORANGEFS_I(parent)->refn;
+ ORANGEFS_khandle_to(&refn.khandle, (char *) fh + 20, 16);
+ fh[9] = refn.fs_id;
+
+ type = 2;
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Encoding parent: handle %pU, fsid %u\n",
+ &refn.khandle,
+ refn.fs_id);
+ }
+ *max_len = len;
+
+out:
+ return type;
+}
+
+static const struct export_operations orangefs_export_ops = {
+ .encode_fh = orangefs_encode_fh,
+ .fh_to_dentry = orangefs_fh_to_dentry,
+};
+
+static int orangefs_unmount(int id, __s32 fs_id, const char *devname)
+{
+ struct orangefs_kernel_op_s *op;
+ int r;
+ op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT);
+ if (!op)
+ return -ENOMEM;
+ op->upcall.req.fs_umount.id = id;
+ op->upcall.req.fs_umount.fs_id = fs_id;
+ strncpy(op->upcall.req.fs_umount.orangefs_config_server,
+ devname, ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
+ r = service_operation(op, "orangefs_fs_umount", 0);
+ /* Not much to do about an error here. */
+ if (r)
+ gossip_err("orangefs_unmount: service_operation %d\n", r);
+ op_release(op);
+ return r;
+}
+
+static int orangefs_fill_sb(struct super_block *sb,
+ struct orangefs_fs_mount_response *fs_mount,
+ void *data, int silent)
+{
+ int ret;
+ struct inode *root;
+ struct dentry *root_dentry;
+ struct orangefs_object_kref root_object;
+
+ ORANGEFS_SB(sb)->sb = sb;
+
+ ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle;
+ ORANGEFS_SB(sb)->fs_id = fs_mount->fs_id;
+ ORANGEFS_SB(sb)->id = fs_mount->id;
+
+ if (data) {
+ ret = parse_mount_options(sb, data, silent);
+ if (ret)
+ return ret;
+ }
+
+ /* Hang the xattr handlers off the superblock */
+ sb->s_xattr = orangefs_xattr_handlers;
+ sb->s_magic = ORANGEFS_SUPER_MAGIC;
+ sb->s_op = &orangefs_s_ops;
+ sb->s_d_op = &orangefs_dentry_operations;
+
+ sb->s_blocksize = PAGE_SIZE;
+ sb->s_blocksize_bits = PAGE_SHIFT;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+
+ ret = super_setup_bdi(sb);
+ if (ret)
+ return ret;
+
+ root_object.khandle = ORANGEFS_SB(sb)->root_khandle;
+ root_object.fs_id = ORANGEFS_SB(sb)->fs_id;
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "get inode %pU, fsid %d\n",
+ &root_object.khandle,
+ root_object.fs_id);
+
+ root = orangefs_iget(sb, &root_object);
+ if (IS_ERR(root))
+ return PTR_ERR(root);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Allocated root inode [%p] with mode %x\n",
+ root,
+ root->i_mode);
+
+ /* allocates and places root dentry in dcache */
+ root_dentry = d_make_root(root);
+ if (!root_dentry)
+ return -ENOMEM;
+
+ sb->s_export_op = &orangefs_export_ops;
+ sb->s_root = root_dentry;
+ return 0;
+}
+
+struct dentry *orangefs_mount(struct file_system_type *fst,
+ int flags,
+ const char *devname,
+ void *data)
+{
+ int ret;
+ struct super_block *sb = ERR_PTR(-EINVAL);
+ struct orangefs_kernel_op_s *new_op;
+ struct dentry *d = ERR_PTR(-EINVAL);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "orangefs_mount: called with devname %s\n",
+ devname);
+
+ if (!devname) {
+ gossip_err("ERROR: device name not specified.\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
+ if (!new_op)
+ return ERR_PTR(-ENOMEM);
+
+ strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
+ devname,
+ ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Attempting ORANGEFS Mount via host %s\n",
+ new_op->upcall.req.fs_mount.orangefs_config_server);
+
+ ret = service_operation(new_op, "orangefs_mount", 0);
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "orangefs_mount: mount got return value of %d\n", ret);
+ if (ret)
+ goto free_op;
+
+ if (new_op->downcall.resp.fs_mount.fs_id == ORANGEFS_FS_ID_NULL) {
+ gossip_err("ERROR: Retrieved null fs_id\n");
+ ret = -EINVAL;
+ goto free_op;
+ }
+
+ sb = sget(fst, NULL, set_anon_super, flags, NULL);
+
+ if (IS_ERR(sb)) {
+ d = ERR_CAST(sb);
+ orangefs_unmount(new_op->downcall.resp.fs_mount.id,
+ new_op->downcall.resp.fs_mount.fs_id, devname);
+ goto free_op;
+ }
+
+ /* alloc and init our private orangefs sb info */
+ sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
+ if (!ORANGEFS_SB(sb)) {
+ d = ERR_PTR(-ENOMEM);
+ goto free_sb_and_op;
+ }
+
+ ret = orangefs_fill_sb(sb,
+ &new_op->downcall.resp.fs_mount, data,
+ flags & SB_SILENT ? 1 : 0);
+
+ if (ret) {
+ d = ERR_PTR(ret);
+ goto free_sb_and_op;
+ }
+
+ /*
+ * on successful mount, store the devname and data
+ * used
+ */
+ strncpy(ORANGEFS_SB(sb)->devname,
+ devname,
+ ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
+
+ /* mount_pending must be cleared */
+ ORANGEFS_SB(sb)->mount_pending = 0;
+
+ /*
+ * finally, add this sb to our list of known orangefs
+ * sb's
+ */
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Adding SB %p to orangefs superblocks\n",
+ ORANGEFS_SB(sb));
+ spin_lock(&orangefs_superblocks_lock);
+ list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);
+ spin_unlock(&orangefs_superblocks_lock);
+ op_release(new_op);
+
+ /* Must be removed from the list now. */
+ ORANGEFS_SB(sb)->no_list = 0;
+
+ if (orangefs_userspace_version >= 20906) {
+ new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
+ if (!new_op)
+ return ERR_PTR(-ENOMEM);
+ new_op->upcall.req.features.features = 0;
+ ret = service_operation(new_op, "orangefs_features", 0);
+ orangefs_features = new_op->downcall.resp.features.features;
+ op_release(new_op);
+ } else {
+ orangefs_features = 0;
+ }
+
+ return dget(sb->s_root);
+
+free_sb_and_op:
+ /* Will call orangefs_kill_sb with sb not in list. */
+ ORANGEFS_SB(sb)->no_list = 1;
+ /* ORANGEFS_VFS_OP_FS_UMOUNT is done by orangefs_kill_sb. */
+ deactivate_locked_super(sb);
+free_op:
+ gossip_err("orangefs_mount: mount request failed with %d\n", ret);
+ if (ret == -EINVAL) {
+ gossip_err("Ensure that all orangefs-servers have the same FS configuration files\n");
+ gossip_err("Look at pvfs2-client-core log file (typically /tmp/pvfs2-client.log) for more details\n");
+ }
+
+ op_release(new_op);
+
+ return d;
+}
+
+void orangefs_kill_sb(struct super_block *sb)
+{
+ int r;
+ gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_kill_sb: called\n");
+
+ /* provided sb cleanup */
+ kill_anon_super(sb);
+
+ if (!ORANGEFS_SB(sb)) {
+ mutex_lock(&orangefs_request_mutex);
+ mutex_unlock(&orangefs_request_mutex);
+ return;
+ }
+ /*
+ * issue the unmount to userspace to tell it to remove the
+ * dynamic mount info it has for this superblock
+ */
+ r = orangefs_unmount(ORANGEFS_SB(sb)->id, ORANGEFS_SB(sb)->fs_id,
+ ORANGEFS_SB(sb)->devname);
+ if (!r)
+ ORANGEFS_SB(sb)->mount_pending = 1;
+
+ if (!ORANGEFS_SB(sb)->no_list) {
+ /* remove the sb from our list of orangefs specific sb's */
+ spin_lock(&orangefs_superblocks_lock);
+ /* not list_del_init */
+ __list_del_entry(&ORANGEFS_SB(sb)->list);
+ ORANGEFS_SB(sb)->list.prev = NULL;
+ spin_unlock(&orangefs_superblocks_lock);
+ }
+
+ /*
+ * make sure that ORANGEFS_DEV_REMOUNT_ALL loop that might've seen us
+ * gets completed before we free the dang thing.
+ */
+ mutex_lock(&orangefs_request_mutex);
+ mutex_unlock(&orangefs_request_mutex);
+
+ /* free the orangefs superblock private data */
+ kfree(ORANGEFS_SB(sb));
+}
+
+int orangefs_inode_cache_initialize(void)
+{
+ orangefs_inode_cache = kmem_cache_create_usercopy(
+ "orangefs_inode_cache",
+ sizeof(struct orangefs_inode_s),
+ 0,
+ ORANGEFS_CACHE_CREATE_FLAGS,
+ offsetof(struct orangefs_inode_s,
+ link_target),
+ sizeof_field(struct orangefs_inode_s,
+ link_target),
+ orangefs_inode_cache_ctor);
+
+ if (!orangefs_inode_cache) {
+ gossip_err("Cannot create orangefs_inode_cache\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+int orangefs_inode_cache_finalize(void)
+{
+ kmem_cache_destroy(orangefs_inode_cache);
+ return 0;
+}
diff --git a/fs/orangefs/symlink.c b/fs/orangefs/symlink.c
new file mode 100644
index 000000000..db107fe91
--- /dev/null
+++ b/fs/orangefs/symlink.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+const struct inode_operations orangefs_symlink_inode_operations = {
+ .get_link = simple_get_link,
+ .setattr = orangefs_setattr,
+ .getattr = orangefs_getattr,
+ .listxattr = orangefs_listxattr,
+ .permission = orangefs_permission,
+ .update_time = orangefs_update_time,
+};
diff --git a/fs/orangefs/upcall.h b/fs/orangefs/upcall.h
new file mode 100644
index 000000000..16118452a
--- /dev/null
+++ b/fs/orangefs/upcall.h
@@ -0,0 +1,260 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#ifndef __UPCALL_H
+#define __UPCALL_H
+
+/*
+ * Sanitized this header file to fix
+ * 32-64 bit interaction issues between
+ * client-core and device
+ */
+struct orangefs_io_request_s {
+ __s32 __pad1;
+ __s32 buf_index;
+ __s32 count;
+ __s32 __pad2;
+ __s64 offset;
+ struct orangefs_object_kref refn;
+ enum ORANGEFS_io_type io_type;
+ __s32 readahead_size;
+};
+
+struct orangefs_lookup_request_s {
+ __s32 sym_follow;
+ __s32 __pad1;
+ struct orangefs_object_kref parent_refn;
+ char d_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_create_request_s {
+ struct orangefs_object_kref parent_refn;
+ struct ORANGEFS_sys_attr_s attributes;
+ char d_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_symlink_request_s {
+ struct orangefs_object_kref parent_refn;
+ struct ORANGEFS_sys_attr_s attributes;
+ char entry_name[ORANGEFS_NAME_MAX];
+ char target[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_getattr_request_s {
+ struct orangefs_object_kref refn;
+ __u32 mask;
+ __u32 __pad1;
+};
+
+struct orangefs_setattr_request_s {
+ struct orangefs_object_kref refn;
+ struct ORANGEFS_sys_attr_s attributes;
+};
+
+struct orangefs_remove_request_s {
+ struct orangefs_object_kref parent_refn;
+ char d_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_mkdir_request_s {
+ struct orangefs_object_kref parent_refn;
+ struct ORANGEFS_sys_attr_s attributes;
+ char d_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_readdir_request_s {
+ struct orangefs_object_kref refn;
+ __u64 token;
+ __s32 max_dirent_count;
+ __s32 buf_index;
+};
+
+struct orangefs_readdirplus_request_s {
+ struct orangefs_object_kref refn;
+ __u64 token;
+ __s32 max_dirent_count;
+ __u32 mask;
+ __s32 buf_index;
+ __s32 __pad1;
+};
+
+struct orangefs_rename_request_s {
+ struct orangefs_object_kref old_parent_refn;
+ struct orangefs_object_kref new_parent_refn;
+ char d_old_name[ORANGEFS_NAME_MAX];
+ char d_new_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_statfs_request_s {
+ __s32 fs_id;
+ __s32 __pad1;
+};
+
+struct orangefs_truncate_request_s {
+ struct orangefs_object_kref refn;
+ __s64 size;
+};
+
+struct orangefs_ra_cache_flush_request_s {
+ struct orangefs_object_kref refn;
+};
+
+struct orangefs_fs_mount_request_s {
+ char orangefs_config_server[ORANGEFS_MAX_SERVER_ADDR_LEN];
+};
+
+struct orangefs_fs_umount_request_s {
+ __s32 id;
+ __s32 fs_id;
+ char orangefs_config_server[ORANGEFS_MAX_SERVER_ADDR_LEN];
+};
+
+struct orangefs_getxattr_request_s {
+ struct orangefs_object_kref refn;
+ __s32 key_sz;
+ __s32 __pad1;
+ char key[ORANGEFS_MAX_XATTR_NAMELEN];
+};
+
+struct orangefs_setxattr_request_s {
+ struct orangefs_object_kref refn;
+ struct ORANGEFS_keyval_pair keyval;
+ __s32 flags;
+ __s32 __pad1;
+};
+
+struct orangefs_listxattr_request_s {
+ struct orangefs_object_kref refn;
+ __s32 requested_count;
+ __s32 __pad1;
+ __u64 token;
+};
+
+struct orangefs_removexattr_request_s {
+ struct orangefs_object_kref refn;
+ __s32 key_sz;
+ __s32 __pad1;
+ char key[ORANGEFS_MAX_XATTR_NAMELEN];
+};
+
+struct orangefs_op_cancel_s {
+ __u64 op_tag;
+};
+
+struct orangefs_fsync_request_s {
+ struct orangefs_object_kref refn;
+};
+
+enum orangefs_param_request_type {
+ ORANGEFS_PARAM_REQUEST_SET = 1,
+ ORANGEFS_PARAM_REQUEST_GET = 2
+};
+
+enum orangefs_param_request_op {
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_TIMEOUT_MSECS = 1,
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_HARD_LIMIT = 2,
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_SOFT_LIMIT = 3,
+ ORANGEFS_PARAM_REQUEST_OP_ACACHE_RECLAIM_PERCENTAGE = 4,
+ ORANGEFS_PARAM_REQUEST_OP_PERF_TIME_INTERVAL_SECS = 5,
+ ORANGEFS_PARAM_REQUEST_OP_PERF_HISTORY_SIZE = 6,
+ ORANGEFS_PARAM_REQUEST_OP_PERF_RESET = 7,
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_TIMEOUT_MSECS = 8,
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_HARD_LIMIT = 9,
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_SOFT_LIMIT = 10,
+ ORANGEFS_PARAM_REQUEST_OP_NCACHE_RECLAIM_PERCENTAGE = 11,
+ ORANGEFS_PARAM_REQUEST_OP_STATIC_ACACHE_TIMEOUT_MSECS = 12,
+ ORANGEFS_PARAM_REQUEST_OP_STATIC_ACACHE_HARD_LIMIT = 13,
+ ORANGEFS_PARAM_REQUEST_OP_STATIC_ACACHE_SOFT_LIMIT = 14,
+ ORANGEFS_PARAM_REQUEST_OP_STATIC_ACACHE_RECLAIM_PERCENTAGE = 15,
+ ORANGEFS_PARAM_REQUEST_OP_CLIENT_DEBUG = 16,
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_TIMEOUT_SECS = 17,
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_HARD_LIMIT = 18,
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_SOFT_LIMIT = 19,
+ ORANGEFS_PARAM_REQUEST_OP_CCACHE_RECLAIM_PERCENTAGE = 20,
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_TIMEOUT_SECS = 21,
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_HARD_LIMIT = 22,
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_SOFT_LIMIT = 23,
+ ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_RECLAIM_PERCENTAGE = 24,
+ ORANGEFS_PARAM_REQUEST_OP_TWO_MASK_VALUES = 25,
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_SIZE = 26,
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT = 27,
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT_SIZE = 28,
+ ORANGEFS_PARAM_REQUEST_OP_READAHEAD_READCNT = 29,
+};
+
+struct orangefs_param_request_s {
+ enum orangefs_param_request_type type;
+ enum orangefs_param_request_op op;
+ union {
+ __s64 value64;
+ __s32 value32[2];
+ } u;
+ char s_value[ORANGEFS_MAX_DEBUG_STRING_LEN];
+};
+
+enum orangefs_perf_count_request_type {
+ ORANGEFS_PERF_COUNT_REQUEST_ACACHE = 1,
+ ORANGEFS_PERF_COUNT_REQUEST_NCACHE = 2,
+ ORANGEFS_PERF_COUNT_REQUEST_CAPCACHE = 3,
+};
+
+struct orangefs_perf_count_request_s {
+ enum orangefs_perf_count_request_type type;
+ __s32 __pad1;
+};
+
+struct orangefs_fs_key_request_s {
+ __s32 fsid;
+ __s32 __pad1;
+};
+
+/* 2.9.6 */
+struct orangefs_features_request_s {
+ __u64 features;
+};
+
+struct orangefs_upcall_s {
+ __s32 type;
+ __u32 uid;
+ __u32 gid;
+ int pid;
+ int tgid;
+ /* Trailers unused but must be retained for protocol compatibility. */
+ __s64 trailer_size;
+ char *trailer_buf;
+
+ union {
+ struct orangefs_io_request_s io;
+ struct orangefs_lookup_request_s lookup;
+ struct orangefs_create_request_s create;
+ struct orangefs_symlink_request_s sym;
+ struct orangefs_getattr_request_s getattr;
+ struct orangefs_setattr_request_s setattr;
+ struct orangefs_remove_request_s remove;
+ struct orangefs_mkdir_request_s mkdir;
+ struct orangefs_readdir_request_s readdir;
+ struct orangefs_readdirplus_request_s readdirplus;
+ struct orangefs_rename_request_s rename;
+ struct orangefs_statfs_request_s statfs;
+ struct orangefs_truncate_request_s truncate;
+ struct orangefs_ra_cache_flush_request_s ra_cache_flush;
+ struct orangefs_fs_mount_request_s fs_mount;
+ struct orangefs_fs_umount_request_s fs_umount;
+ struct orangefs_getxattr_request_s getxattr;
+ struct orangefs_setxattr_request_s setxattr;
+ struct orangefs_listxattr_request_s listxattr;
+ struct orangefs_removexattr_request_s removexattr;
+ struct orangefs_op_cancel_s cancel;
+ struct orangefs_fsync_request_s fsync;
+ struct orangefs_param_request_s param;
+ struct orangefs_perf_count_request_s perf_count;
+ struct orangefs_fs_key_request_s fs_key;
+ struct orangefs_features_request_s features;
+ } req;
+};
+
+#endif /* __UPCALL_H */
diff --git a/fs/orangefs/waitqueue.c b/fs/orangefs/waitqueue.c
new file mode 100644
index 000000000..beafc33d5
--- /dev/null
+++ b/fs/orangefs/waitqueue.c
@@ -0,0 +1,373 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * (C) 2011 Omnibond Systems
+ *
+ * Changes by Acxiom Corporation to implement generic service_operation()
+ * function, Copyright Acxiom Corporation, 2005.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * In-kernel waitqueue operations.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
+ long timeout,
+ int flags)
+ __acquires(op->lock);
+static void orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
+ __releases(op->lock);
+
+/*
+ * What we do in this function is to walk the list of operations that are
+ * present in the request queue and mark them as purged.
+ * NOTE: This is called from the device close after client-core has
+ * guaranteed that no new operations could appear on the list since the
+ * client-core is anyway going to exit.
+ */
+void purge_waiting_ops(void)
+{
+ struct orangefs_kernel_op_s *op, *tmp;
+
+ spin_lock(&orangefs_request_list_lock);
+ list_for_each_entry_safe(op, tmp, &orangefs_request_list, list) {
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "pvfs2-client-core: purging op tag %llu %s\n",
+ llu(op->tag),
+ get_opname_string(op));
+ set_op_state_purged(op);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: op:%s: op_state:%d: process:%s:\n",
+ __func__,
+ get_opname_string(op),
+ op->op_state,
+ current->comm);
+ }
+ spin_unlock(&orangefs_request_list_lock);
+}
+
+/*
+ * submits a ORANGEFS operation and waits for it to complete
+ *
+ * Note op->downcall.status will contain the status of the operation (in
+ * errno format), whether provided by pvfs2-client or a result of failure to
+ * service the operation. If the caller wishes to distinguish, then
+ * op->state can be checked to see if it was serviced or not.
+ *
+ * Returns contents of op->downcall.status for convenience
+ */
+int service_operation(struct orangefs_kernel_op_s *op,
+ const char *op_name,
+ int flags)
+{
+ long timeout = MAX_SCHEDULE_TIMEOUT;
+ int ret = 0;
+
+ DEFINE_WAIT(wait_entry);
+
+ op->upcall.tgid = current->tgid;
+ op->upcall.pid = current->pid;
+
+retry_servicing:
+ op->downcall.status = 0;
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "%s: %s op:%p: process:%s: pid:%d:\n",
+ __func__,
+ op_name,
+ op,
+ current->comm,
+ current->pid);
+
+ /*
+ * If ORANGEFS_OP_NO_MUTEX was set in flags, we need to avoid
+ * acquiring the request_mutex because we're servicing a
+ * high priority remount operation and the request_mutex is
+ * already taken.
+ */
+ if (!(flags & ORANGEFS_OP_NO_MUTEX)) {
+ if (flags & ORANGEFS_OP_INTERRUPTIBLE)
+ ret = mutex_lock_interruptible(&orangefs_request_mutex);
+ else
+ ret = mutex_lock_killable(&orangefs_request_mutex);
+ /*
+ * check to see if we were interrupted while waiting for
+ * mutex
+ */
+ if (ret < 0) {
+ op->downcall.status = ret;
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "%s: service_operation interrupted.\n",
+ __func__);
+ return ret;
+ }
+ }
+
+ /* queue up the operation */
+ spin_lock(&orangefs_request_list_lock);
+ spin_lock(&op->lock);
+ set_op_state_waiting(op);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: op:%s: op_state:%d: process:%s:\n",
+ __func__,
+ get_opname_string(op),
+ op->op_state,
+ current->comm);
+ /* add high priority remount op to the front of the line. */
+ if (flags & ORANGEFS_OP_PRIORITY)
+ list_add(&op->list, &orangefs_request_list);
+ else
+ list_add_tail(&op->list, &orangefs_request_list);
+ spin_unlock(&op->lock);
+ wake_up_interruptible(&orangefs_request_list_waitq);
+ if (!__is_daemon_in_service()) {
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "%s:client core is NOT in service.\n",
+ __func__);
+ /*
+ * Don't wait for the userspace component to return if
+ * the filesystem is being umounted anyway.
+ */
+ if (op->upcall.type == ORANGEFS_VFS_OP_FS_UMOUNT)
+ timeout = 0;
+ else
+ timeout = op_timeout_secs * HZ;
+ }
+ spin_unlock(&orangefs_request_list_lock);
+
+ if (!(flags & ORANGEFS_OP_NO_MUTEX))
+ mutex_unlock(&orangefs_request_mutex);
+
+ ret = wait_for_matching_downcall(op, timeout, flags);
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "%s: wait_for_matching_downcall returned %d for %p\n",
+ __func__,
+ ret,
+ op);
+
+ /* got matching downcall; make sure status is in errno format */
+ if (!ret) {
+ spin_unlock(&op->lock);
+ op->downcall.status =
+ orangefs_normalize_to_errno(op->downcall.status);
+ ret = op->downcall.status;
+ goto out;
+ }
+
+ /* failed to get matching downcall */
+ if (ret == -ETIMEDOUT) {
+ gossip_err("%s: %s -- wait timed out; aborting attempt.\n",
+ __func__,
+ op_name);
+ }
+
+ /*
+ * remove a waiting op from the request list or
+ * remove an in-progress op from the in-progress list.
+ */
+ orangefs_clean_up_interrupted_operation(op);
+
+ op->downcall.status = ret;
+ /* retry if operation has not been serviced and if requested */
+ if (ret == -EAGAIN) {
+ op->attempts++;
+ timeout = op_timeout_secs * HZ;
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "orangefs: tag %llu (%s)"
+ " -- operation to be retried (%d attempt)\n",
+ llu(op->tag),
+ op_name,
+ op->attempts);
+
+ /*
+ * io ops (ops that use the shared memory buffer) have
+ * to be returned to their caller for a retry. Other ops
+ * can just be recycled here.
+ */
+ if (!op->uses_shared_memory)
+ goto retry_servicing;
+ }
+
+out:
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "%s: %s returning: %d for %p.\n",
+ __func__,
+ op_name,
+ ret,
+ op);
+ return ret;
+}
+
+/* This can get called on an I/O op if it had a bad service_operation. */
+bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op)
+{
+ u64 tag = op->tag;
+ if (!op_state_in_progress(op))
+ return false;
+
+ op->slot_to_free = op->upcall.req.io.buf_index;
+ memset(&op->upcall, 0, sizeof(op->upcall));
+ memset(&op->downcall, 0, sizeof(op->downcall));
+ op->upcall.type = ORANGEFS_VFS_OP_CANCEL;
+ op->upcall.req.cancel.op_tag = tag;
+ op->downcall.type = ORANGEFS_VFS_OP_INVALID;
+ op->downcall.status = -1;
+ orangefs_new_tag(op);
+
+ spin_lock(&orangefs_request_list_lock);
+ /* orangefs_request_list_lock is enough of a barrier here */
+ if (!__is_daemon_in_service()) {
+ spin_unlock(&orangefs_request_list_lock);
+ return false;
+ }
+ spin_lock(&op->lock);
+ set_op_state_waiting(op);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s: op:%s: op_state:%d: process:%s:\n",
+ __func__,
+ get_opname_string(op),
+ op->op_state,
+ current->comm);
+ list_add(&op->list, &orangefs_request_list);
+ spin_unlock(&op->lock);
+ spin_unlock(&orangefs_request_list_lock);
+
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "Attempting ORANGEFS operation cancellation of tag %llu\n",
+ llu(tag));
+ return true;
+}
+
+/*
+ * Change an op to the "given up" state and remove it from its list.
+ */
+static void
+ orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
+ __releases(op->lock)
+{
+ /*
+ * handle interrupted cases depending on what state we were in when
+ * the interruption is detected.
+ *
+ * Called with op->lock held.
+ */
+
+ /*
+ * List manipulation code elsewhere will ignore ops that
+ * have been given up upon.
+ */
+ op->op_state |= OP_VFS_STATE_GIVEN_UP;
+
+ if (list_empty(&op->list)) {
+ /* caught copying to/from daemon */
+ BUG_ON(op_state_serviced(op));
+ spin_unlock(&op->lock);
+ wait_for_completion(&op->waitq);
+ } else if (op_state_waiting(op)) {
+ /*
+ * upcall hasn't been read; remove op from upcall request
+ * list.
+ */
+ spin_unlock(&op->lock);
+ spin_lock(&orangefs_request_list_lock);
+ list_del_init(&op->list);
+ spin_unlock(&orangefs_request_list_lock);
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "Interrupted: Removed op %p from request_list\n",
+ op);
+ } else if (op_state_in_progress(op)) {
+ /* op must be removed from the in progress htable */
+ spin_unlock(&op->lock);
+ spin_lock(&orangefs_htable_ops_in_progress_lock);
+ list_del_init(&op->list);
+ spin_unlock(&orangefs_htable_ops_in_progress_lock);
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "Interrupted: Removed op %p"
+ " from htable_ops_in_progress\n",
+ op);
+ } else {
+ spin_unlock(&op->lock);
+ gossip_err("interrupted operation is in a weird state 0x%x\n",
+ op->op_state);
+ }
+ reinit_completion(&op->waitq);
+}
+
+/*
+ * Sleeps on waitqueue waiting for matching downcall.
+ * If client-core finishes servicing, then we are good to go.
+ * else if client-core exits, we get woken up here, and retry with a timeout
+ *
+ * When this call returns to the caller, the specified op will no
+ * longer be in either the in_progress hash table or on the request list.
+ *
+ * Returns 0 on success and -errno on failure
+ * Errors are:
+ * EAGAIN in case we want the caller to requeue and try again..
+ * EINTR/EIO/ETIMEDOUT indicating we are done trying to service this
+ * operation since client-core seems to be exiting too often
+ * or if we were interrupted.
+ *
+ * Returns with op->lock taken.
+ */
+static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
+ long timeout,
+ int flags)
+ __acquires(op->lock)
+{
+ long n;
+ int writeback = flags & ORANGEFS_OP_WRITEBACK,
+ interruptible = flags & ORANGEFS_OP_INTERRUPTIBLE;
+
+ /*
+ * There's a "schedule_timeout" inside of these wait
+ * primitives, during which the op is out of the hands of the
+ * user process that needs something done and is being
+ * manipulated by the client-core process.
+ */
+ if (writeback)
+ n = wait_for_completion_io_timeout(&op->waitq, timeout);
+ else if (!writeback && interruptible)
+ n = wait_for_completion_interruptible_timeout(&op->waitq,
+ timeout);
+ else /* !writeback && !interruptible but compiler complains */
+ n = wait_for_completion_killable_timeout(&op->waitq, timeout);
+
+ spin_lock(&op->lock);
+
+ if (op_state_serviced(op))
+ return 0;
+
+ if (unlikely(n < 0)) {
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "%s: operation interrupted, tag %llu, %p\n",
+ __func__,
+ llu(op->tag),
+ op);
+ return -EINTR;
+ }
+ if (op_state_purged(op)) {
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "%s: operation purged, tag %llu, %p, %d\n",
+ __func__,
+ llu(op->tag),
+ op,
+ op->attempts);
+ return (op->attempts < ORANGEFS_PURGE_RETRY_COUNT) ?
+ -EAGAIN :
+ -EIO;
+ }
+ /* must have timed out, then... */
+ gossip_debug(GOSSIP_WAIT_DEBUG,
+ "%s: operation timed out, tag %llu, %p, %d)\n",
+ __func__,
+ llu(op->tag),
+ op,
+ op->attempts);
+ return -ETIMEDOUT;
+}
diff --git a/fs/orangefs/xattr.c b/fs/orangefs/xattr.c
new file mode 100644
index 000000000..9a5b757fb
--- /dev/null
+++ b/fs/orangefs/xattr.c
@@ -0,0 +1,562 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Linux VFS extended attribute operations.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+#include <linux/posix_acl_xattr.h>
+#include <linux/xattr.h>
+#include <linux/hashtable.h>
+
+#define SYSTEM_ORANGEFS_KEY "system.pvfs2."
+#define SYSTEM_ORANGEFS_KEY_LEN 13
+
+/*
+ * this function returns
+ * 0 if the key corresponding to name is not meant to be printed as part
+ * of a listxattr.
+ * 1 if the key corresponding to name is meant to be returned as part of
+ * a listxattr.
+ * The ones that start SYSTEM_ORANGEFS_KEY are the ones to avoid printing.
+ */
+static int is_reserved_key(const char *key, size_t size)
+{
+
+ if (size < SYSTEM_ORANGEFS_KEY_LEN)
+ return 1;
+
+ return strncmp(key, SYSTEM_ORANGEFS_KEY, SYSTEM_ORANGEFS_KEY_LEN) ? 1 : 0;
+}
+
+static inline int convert_to_internal_xattr_flags(int setxattr_flags)
+{
+ int internal_flag = 0;
+
+ if (setxattr_flags & XATTR_REPLACE) {
+ /* Attribute must exist! */
+ internal_flag = ORANGEFS_XATTR_REPLACE;
+ } else if (setxattr_flags & XATTR_CREATE) {
+ /* Attribute must not exist */
+ internal_flag = ORANGEFS_XATTR_CREATE;
+ }
+ return internal_flag;
+}
+
+static unsigned int xattr_key(const char *key)
+{
+ unsigned int i = 0;
+ while (key)
+ i += *key++;
+ return i % 16;
+}
+
+static struct orangefs_cached_xattr *find_cached_xattr(struct inode *inode,
+ const char *key)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_cached_xattr *cx;
+ struct hlist_head *h;
+ struct hlist_node *tmp;
+ h = &orangefs_inode->xattr_cache[xattr_key(key)];
+ if (hlist_empty(h))
+ return NULL;
+ hlist_for_each_entry_safe(cx, tmp, h, node) {
+/* if (!time_before(jiffies, cx->timeout)) {
+ hlist_del(&cx->node);
+ kfree(cx);
+ continue;
+ }*/
+ if (!strcmp(cx->key, key))
+ return cx;
+ }
+ return NULL;
+}
+
+/*
+ * Tries to get a specified key's attributes of a given
+ * file into a user-specified buffer. Note that the getxattr
+ * interface allows for the users to probe the size of an
+ * extended attribute by passing in a value of 0 to size.
+ * Thus our return value is always the size of the attribute
+ * unless the key does not exist for the file and/or if
+ * there were errors in fetching the attribute value.
+ */
+ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
+ void *buffer, size_t size)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op = NULL;
+ struct orangefs_cached_xattr *cx;
+ ssize_t ret = -ENOMEM;
+ ssize_t length = 0;
+ int fsuid;
+ int fsgid;
+
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "%s: name %s, buffer_size %zd\n",
+ __func__, name, size);
+
+ if (S_ISLNK(inode->i_mode))
+ return -EOPNOTSUPP;
+
+ if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
+ return -EINVAL;
+
+ fsuid = from_kuid(&init_user_ns, current_fsuid());
+ fsgid = from_kgid(&init_user_ns, current_fsgid());
+
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "getxattr on inode %pU, name %s "
+ "(uid %o, gid %o)\n",
+ get_khandle_from_ino(inode),
+ name,
+ fsuid,
+ fsgid);
+
+ down_read(&orangefs_inode->xattr_sem);
+
+ cx = find_cached_xattr(inode, name);
+ if (cx && time_before(jiffies, cx->timeout)) {
+ if (cx->length == -1) {
+ ret = -ENODATA;
+ goto out_unlock;
+ } else {
+ if (size == 0) {
+ ret = cx->length;
+ goto out_unlock;
+ }
+ if (cx->length > size) {
+ ret = -ERANGE;
+ goto out_unlock;
+ }
+ memcpy(buffer, cx->val, cx->length);
+ memset(buffer + cx->length, 0, size - cx->length);
+ ret = cx->length;
+ goto out_unlock;
+ }
+ }
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_GETXATTR);
+ if (!new_op)
+ goto out_unlock;
+
+ new_op->upcall.req.getxattr.refn = orangefs_inode->refn;
+ strcpy(new_op->upcall.req.getxattr.key, name);
+
+ /*
+ * NOTE: Although keys are meant to be NULL terminated textual
+ * strings, I am going to explicitly pass the length just in case
+ * we change this later on...
+ */
+ new_op->upcall.req.getxattr.key_sz = strlen(name) + 1;
+
+ ret = service_operation(new_op, "orangefs_inode_getxattr",
+ get_interruptible_flag(inode));
+ if (ret != 0) {
+ if (ret == -ENOENT) {
+ ret = -ENODATA;
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "orangefs_inode_getxattr: inode %pU key %s"
+ " does not exist!\n",
+ get_khandle_from_ino(inode),
+ (char *)new_op->upcall.req.getxattr.key);
+ cx = kmalloc(sizeof *cx, GFP_KERNEL);
+ if (cx) {
+ strcpy(cx->key, name);
+ cx->length = -1;
+ cx->timeout = jiffies +
+ orangefs_getattr_timeout_msecs*HZ/1000;
+ hash_add(orangefs_inode->xattr_cache, &cx->node,
+ xattr_key(cx->key));
+ }
+ }
+ goto out_release_op;
+ }
+
+ /*
+ * Length returned includes null terminator.
+ */
+ length = new_op->downcall.resp.getxattr.val_sz;
+
+ /*
+ * Just return the length of the queried attribute.
+ */
+ if (size == 0) {
+ ret = length;
+ goto out_release_op;
+ }
+
+ /*
+ * Check to see if key length is > provided buffer size.
+ */
+ if (length > size) {
+ ret = -ERANGE;
+ goto out_release_op;
+ }
+
+ memcpy(buffer, new_op->downcall.resp.getxattr.val, length);
+ memset(buffer + length, 0, size - length);
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "orangefs_inode_getxattr: inode %pU "
+ "key %s key_sz %d, val_len %d\n",
+ get_khandle_from_ino(inode),
+ (char *)new_op->
+ upcall.req.getxattr.key,
+ (int)new_op->
+ upcall.req.getxattr.key_sz,
+ (int)ret);
+
+ ret = length;
+
+ if (cx) {
+ strcpy(cx->key, name);
+ memcpy(cx->val, buffer, length);
+ cx->length = length;
+ cx->timeout = jiffies + HZ;
+ } else {
+ cx = kmalloc(sizeof *cx, GFP_KERNEL);
+ if (cx) {
+ strcpy(cx->key, name);
+ memcpy(cx->val, buffer, length);
+ cx->length = length;
+ cx->timeout = jiffies + HZ;
+ hash_add(orangefs_inode->xattr_cache, &cx->node,
+ xattr_key(cx->key));
+ }
+ }
+
+out_release_op:
+ op_release(new_op);
+out_unlock:
+ up_read(&orangefs_inode->xattr_sem);
+ return ret;
+}
+
+static int orangefs_inode_removexattr(struct inode *inode, const char *name,
+ int flags)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op = NULL;
+ struct orangefs_cached_xattr *cx;
+ struct hlist_head *h;
+ struct hlist_node *tmp;
+ int ret = -ENOMEM;
+
+ if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
+ return -EINVAL;
+
+ down_write(&orangefs_inode->xattr_sem);
+ new_op = op_alloc(ORANGEFS_VFS_OP_REMOVEXATTR);
+ if (!new_op)
+ goto out_unlock;
+
+ new_op->upcall.req.removexattr.refn = orangefs_inode->refn;
+ /*
+ * NOTE: Although keys are meant to be NULL terminated
+ * textual strings, I am going to explicitly pass the
+ * length just in case we change this later on...
+ */
+ strcpy(new_op->upcall.req.removexattr.key, name);
+ new_op->upcall.req.removexattr.key_sz = strlen(name) + 1;
+
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "orangefs_inode_removexattr: key %s, key_sz %d\n",
+ (char *)new_op->upcall.req.removexattr.key,
+ (int)new_op->upcall.req.removexattr.key_sz);
+
+ ret = service_operation(new_op,
+ "orangefs_inode_removexattr",
+ get_interruptible_flag(inode));
+ if (ret == -ENOENT) {
+ /*
+ * Request to replace a non-existent attribute is an error.
+ */
+ if (flags & XATTR_REPLACE)
+ ret = -ENODATA;
+ else
+ ret = 0;
+ }
+
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "orangefs_inode_removexattr: returning %d\n", ret);
+
+ op_release(new_op);
+
+ h = &orangefs_inode->xattr_cache[xattr_key(name)];
+ hlist_for_each_entry_safe(cx, tmp, h, node) {
+ if (!strcmp(cx->key, name)) {
+ hlist_del(&cx->node);
+ kfree(cx);
+ break;
+ }
+ }
+
+out_unlock:
+ up_write(&orangefs_inode->xattr_sem);
+ return ret;
+}
+
+/*
+ * Tries to set an attribute for a given key on a file.
+ *
+ * Returns a -ve number on error and 0 on success. Key is text, but value
+ * can be binary!
+ */
+int orangefs_inode_setxattr(struct inode *inode, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op;
+ int internal_flag = 0;
+ struct orangefs_cached_xattr *cx;
+ struct hlist_head *h;
+ struct hlist_node *tmp;
+ int ret = -ENOMEM;
+
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "%s: name %s, buffer_size %zd\n",
+ __func__, name, size);
+
+ if (size > ORANGEFS_MAX_XATTR_VALUELEN)
+ return -EINVAL;
+ if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
+ return -EINVAL;
+
+ internal_flag = convert_to_internal_xattr_flags(flags);
+
+ /* This is equivalent to a removexattr */
+ if (size == 0 && !value) {
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "removing xattr (%s)\n",
+ name);
+ return orangefs_inode_removexattr(inode, name, flags);
+ }
+
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "setxattr on inode %pU, name %s\n",
+ get_khandle_from_ino(inode),
+ name);
+
+ down_write(&orangefs_inode->xattr_sem);
+ new_op = op_alloc(ORANGEFS_VFS_OP_SETXATTR);
+ if (!new_op)
+ goto out_unlock;
+
+
+ new_op->upcall.req.setxattr.refn = orangefs_inode->refn;
+ new_op->upcall.req.setxattr.flags = internal_flag;
+ /*
+ * NOTE: Although keys are meant to be NULL terminated textual
+ * strings, I am going to explicitly pass the length just in
+ * case we change this later on...
+ */
+ strcpy(new_op->upcall.req.setxattr.keyval.key, name);
+ new_op->upcall.req.setxattr.keyval.key_sz = strlen(name) + 1;
+ memcpy(new_op->upcall.req.setxattr.keyval.val, value, size);
+ new_op->upcall.req.setxattr.keyval.val_sz = size;
+
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "orangefs_inode_setxattr: key %s, key_sz %d "
+ " value size %zd\n",
+ (char *)new_op->upcall.req.setxattr.keyval.key,
+ (int)new_op->upcall.req.setxattr.keyval.key_sz,
+ size);
+
+ ret = service_operation(new_op,
+ "orangefs_inode_setxattr",
+ get_interruptible_flag(inode));
+
+ gossip_debug(GOSSIP_XATTR_DEBUG,
+ "orangefs_inode_setxattr: returning %d\n",
+ ret);
+
+ /* when request is serviced properly, free req op struct */
+ op_release(new_op);
+
+ h = &orangefs_inode->xattr_cache[xattr_key(name)];
+ hlist_for_each_entry_safe(cx, tmp, h, node) {
+ if (!strcmp(cx->key, name)) {
+ hlist_del(&cx->node);
+ kfree(cx);
+ break;
+ }
+ }
+
+out_unlock:
+ up_write(&orangefs_inode->xattr_sem);
+ return ret;
+}
+
+/*
+ * Tries to get a specified object's keys into a user-specified buffer of a
+ * given size. Note that like the previous instances of xattr routines, this
+ * also allows you to pass in a NULL pointer and 0 size to probe the size for
+ * subsequent memory allocations. Thus our return value is always the size of
+ * all the keys unless there were errors in fetching the keys!
+ */
+ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size)
+{
+ struct inode *inode = dentry->d_inode;
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op;
+ __u64 token = ORANGEFS_ITERATE_START;
+ ssize_t ret = -ENOMEM;
+ ssize_t total = 0;
+ int count_keys = 0;
+ int key_size;
+ int i = 0;
+ int returned_count = 0;
+
+ if (size > 0 && !buffer) {
+ gossip_err("%s: bogus NULL pointers\n", __func__);
+ return -EINVAL;
+ }
+
+ down_read(&orangefs_inode->xattr_sem);
+ new_op = op_alloc(ORANGEFS_VFS_OP_LISTXATTR);
+ if (!new_op)
+ goto out_unlock;
+
+ if (buffer && size > 0)
+ memset(buffer, 0, size);
+
+try_again:
+ key_size = 0;
+ new_op->upcall.req.listxattr.refn = orangefs_inode->refn;
+ new_op->upcall.req.listxattr.token = token;
+ new_op->upcall.req.listxattr.requested_count =
+ (size == 0) ? 0 : ORANGEFS_MAX_XATTR_LISTLEN;
+ ret = service_operation(new_op, __func__,
+ get_interruptible_flag(inode));
+ if (ret != 0)
+ goto done;
+
+ if (size == 0) {
+ /*
+ * This is a bit of a big upper limit, but I did not want to
+ * spend too much time getting this correct, since users end
+ * up allocating memory rather than us...
+ */
+ total = new_op->downcall.resp.listxattr.returned_count *
+ ORANGEFS_MAX_XATTR_NAMELEN;
+ goto done;
+ }
+
+ returned_count = new_op->downcall.resp.listxattr.returned_count;
+ if (returned_count < 0 ||
+ returned_count > ORANGEFS_MAX_XATTR_LISTLEN) {
+ gossip_err("%s: impossible value for returned_count:%d:\n",
+ __func__,
+ returned_count);
+ ret = -EIO;
+ goto done;
+ }
+
+ /*
+ * Check to see how much can be fit in the buffer. Fit only whole keys.
+ */
+ for (i = 0; i < returned_count; i++) {
+ if (new_op->downcall.resp.listxattr.lengths[i] < 0 ||
+ new_op->downcall.resp.listxattr.lengths[i] >
+ ORANGEFS_MAX_XATTR_NAMELEN) {
+ gossip_err("%s: impossible value for lengths[%d]\n",
+ __func__,
+ new_op->downcall.resp.listxattr.lengths[i]);
+ ret = -EIO;
+ goto done;
+ }
+ if (total + new_op->downcall.resp.listxattr.lengths[i] > size)
+ goto done;
+
+ /*
+ * Since many dumb programs try to setxattr() on our reserved
+ * xattrs this is a feeble attempt at defeating those by not
+ * listing them in the output of listxattr.. sigh
+ */
+ if (is_reserved_key(new_op->downcall.resp.listxattr.key +
+ key_size,
+ new_op->downcall.resp.
+ listxattr.lengths[i])) {
+ gossip_debug(GOSSIP_XATTR_DEBUG, "Copying key %d -> %s\n",
+ i, new_op->downcall.resp.listxattr.key +
+ key_size);
+ memcpy(buffer + total,
+ new_op->downcall.resp.listxattr.key + key_size,
+ new_op->downcall.resp.listxattr.lengths[i]);
+ total += new_op->downcall.resp.listxattr.lengths[i];
+ count_keys++;
+ } else {
+ gossip_debug(GOSSIP_XATTR_DEBUG, "[RESERVED] key %d -> %s\n",
+ i, new_op->downcall.resp.listxattr.key +
+ key_size);
+ }
+ key_size += new_op->downcall.resp.listxattr.lengths[i];
+ }
+
+ /*
+ * Since the buffer was large enough, we might have to continue
+ * fetching more keys!
+ */
+ token = new_op->downcall.resp.listxattr.token;
+ if (token != ORANGEFS_ITERATE_END)
+ goto try_again;
+
+done:
+ gossip_debug(GOSSIP_XATTR_DEBUG, "%s: returning %d"
+ " [size of buffer %ld] (filled in %d keys)\n",
+ __func__,
+ ret ? (int)ret : (int)total,
+ (long)size,
+ count_keys);
+ op_release(new_op);
+ if (ret == 0)
+ ret = total;
+out_unlock:
+ up_read(&orangefs_inode->xattr_sem);
+ return ret;
+}
+
+static int orangefs_xattr_set_default(const struct xattr_handler *handler,
+ struct user_namespace *mnt_userns,
+ struct dentry *unused,
+ struct inode *inode,
+ const char *name,
+ const void *buffer,
+ size_t size,
+ int flags)
+{
+ return orangefs_inode_setxattr(inode, name, buffer, size, flags);
+}
+
+static int orangefs_xattr_get_default(const struct xattr_handler *handler,
+ struct dentry *unused,
+ struct inode *inode,
+ const char *name,
+ void *buffer,
+ size_t size)
+{
+ return orangefs_inode_getxattr(inode, name, buffer, size);
+
+}
+
+static const struct xattr_handler orangefs_xattr_default_handler = {
+ .prefix = "", /* match any name => handlers called with full name */
+ .get = orangefs_xattr_get_default,
+ .set = orangefs_xattr_set_default,
+};
+
+const struct xattr_handler *orangefs_xattr_handlers[] = {
+ &posix_acl_access_xattr_handler,
+ &posix_acl_default_xattr_handler,
+ &orangefs_xattr_default_handler,
+ NULL
+};