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-rw-r--r--fs/nfs/nfs3proc.c1044
1 files changed, 1044 insertions, 0 deletions
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
new file mode 100644
index 000000000..e1491def7
--- /dev/null
+++ b/fs/nfs/nfs3proc.c
@@ -0,0 +1,1044 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/nfs/nfs3proc.c
+ *
+ * Client-side NFSv3 procedures stubs.
+ *
+ * Copyright (C) 1997, Olaf Kirch
+ */
+
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/slab.h>
+#include <linux/nfs.h>
+#include <linux/nfs3.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_page.h>
+#include <linux/lockd/bind.h>
+#include <linux/nfs_mount.h>
+#include <linux/freezer.h>
+#include <linux/xattr.h>
+
+#include "iostat.h"
+#include "internal.h"
+#include "nfs3_fs.h"
+
+#define NFSDBG_FACILITY NFSDBG_PROC
+
+/* A wrapper to handle the EJUKEBOX error messages */
+static int
+nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
+{
+ int res;
+ do {
+ res = rpc_call_sync(clnt, msg, flags);
+ if (res != -EJUKEBOX)
+ break;
+ freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
+ res = -ERESTARTSYS;
+ } while (!fatal_signal_pending(current));
+ return res;
+}
+
+#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
+
+static int
+nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
+{
+ if (task->tk_status != -EJUKEBOX)
+ return 0;
+ if (task->tk_status == -EJUKEBOX)
+ nfs_inc_stats(inode, NFSIOS_DELAY);
+ task->tk_status = 0;
+ rpc_restart_call(task);
+ rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
+ return 1;
+}
+
+static int
+do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
+ struct nfs_fsinfo *info)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
+ .rpc_argp = fhandle,
+ .rpc_resp = info,
+ };
+ int status;
+
+ dprintk("%s: call fsinfo\n", __func__);
+ nfs_fattr_init(info->fattr);
+ status = rpc_call_sync(client, &msg, 0);
+ dprintk("%s: reply fsinfo: %d\n", __func__, status);
+ if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
+ msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
+ msg.rpc_resp = info->fattr;
+ status = rpc_call_sync(client, &msg, 0);
+ dprintk("%s: reply getattr: %d\n", __func__, status);
+ }
+ return status;
+}
+
+/*
+ * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
+ */
+static int
+nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
+ struct nfs_fsinfo *info)
+{
+ int status;
+
+ status = do_proc_get_root(server->client, fhandle, info);
+ if (status && server->nfs_client->cl_rpcclient != server->client)
+ status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
+ return status;
+}
+
+/*
+ * One function for each procedure in the NFS protocol.
+ */
+static int
+nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
+ struct nfs_fattr *fattr, struct nfs4_label *label,
+ struct inode *inode)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
+ .rpc_argp = fhandle,
+ .rpc_resp = fattr,
+ };
+ int status;
+ unsigned short task_flags = 0;
+
+ /* Is this is an attribute revalidation, subject to softreval? */
+ if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
+ task_flags |= RPC_TASK_TIMEOUT;
+
+ dprintk("NFS call getattr\n");
+ nfs_fattr_init(fattr);
+ status = rpc_call_sync(server->client, &msg, task_flags);
+ dprintk("NFS reply getattr: %d\n", status);
+ return status;
+}
+
+static int
+nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
+ struct iattr *sattr)
+{
+ struct inode *inode = d_inode(dentry);
+ struct nfs3_sattrargs arg = {
+ .fh = NFS_FH(inode),
+ .sattr = sattr,
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
+ .rpc_argp = &arg,
+ .rpc_resp = fattr,
+ };
+ int status;
+
+ dprintk("NFS call setattr\n");
+ if (sattr->ia_valid & ATTR_FILE)
+ msg.rpc_cred = nfs_file_cred(sattr->ia_file);
+ nfs_fattr_init(fattr);
+ status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+ if (status == 0) {
+ nfs_setattr_update_inode(inode, sattr, fattr);
+ if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
+ nfs_zap_acl_cache(inode);
+ }
+ dprintk("NFS reply setattr: %d\n", status);
+ return status;
+}
+
+static int
+nfs3_proc_lookup(struct inode *dir, struct dentry *dentry,
+ struct nfs_fh *fhandle, struct nfs_fattr *fattr,
+ struct nfs4_label *label)
+{
+ struct nfs3_diropargs arg = {
+ .fh = NFS_FH(dir),
+ .name = dentry->d_name.name,
+ .len = dentry->d_name.len
+ };
+ struct nfs3_diropres res = {
+ .fh = fhandle,
+ .fattr = fattr
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
+ .rpc_argp = &arg,
+ .rpc_resp = &res,
+ };
+ int status;
+ unsigned short task_flags = 0;
+
+ /* Is this is an attribute revalidation, subject to softreval? */
+ if (nfs_lookup_is_soft_revalidate(dentry))
+ task_flags |= RPC_TASK_TIMEOUT;
+
+ res.dir_attr = nfs_alloc_fattr();
+ if (res.dir_attr == NULL)
+ return -ENOMEM;
+
+ dprintk("NFS call lookup %pd2\n", dentry);
+ nfs_fattr_init(fattr);
+ status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags);
+ nfs_refresh_inode(dir, res.dir_attr);
+ if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
+ msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
+ msg.rpc_argp = fhandle;
+ msg.rpc_resp = fattr;
+ status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags);
+ }
+ nfs_free_fattr(res.dir_attr);
+ dprintk("NFS reply lookup: %d\n", status);
+ return status;
+}
+
+static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
+{
+ struct nfs3_accessargs arg = {
+ .fh = NFS_FH(inode),
+ .access = entry->mask,
+ };
+ struct nfs3_accessres res;
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
+ .rpc_argp = &arg,
+ .rpc_resp = &res,
+ .rpc_cred = entry->cred,
+ };
+ int status = -ENOMEM;
+
+ dprintk("NFS call access\n");
+ res.fattr = nfs_alloc_fattr();
+ if (res.fattr == NULL)
+ goto out;
+
+ status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+ nfs_refresh_inode(inode, res.fattr);
+ if (status == 0)
+ nfs_access_set_mask(entry, res.access);
+ nfs_free_fattr(res.fattr);
+out:
+ dprintk("NFS reply access: %d\n", status);
+ return status;
+}
+
+static int nfs3_proc_readlink(struct inode *inode, struct page *page,
+ unsigned int pgbase, unsigned int pglen)
+{
+ struct nfs_fattr *fattr;
+ struct nfs3_readlinkargs args = {
+ .fh = NFS_FH(inode),
+ .pgbase = pgbase,
+ .pglen = pglen,
+ .pages = &page
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
+ .rpc_argp = &args,
+ };
+ int status = -ENOMEM;
+
+ dprintk("NFS call readlink\n");
+ fattr = nfs_alloc_fattr();
+ if (fattr == NULL)
+ goto out;
+ msg.rpc_resp = fattr;
+
+ status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+ nfs_refresh_inode(inode, fattr);
+ nfs_free_fattr(fattr);
+out:
+ dprintk("NFS reply readlink: %d\n", status);
+ return status;
+}
+
+struct nfs3_createdata {
+ struct rpc_message msg;
+ union {
+ struct nfs3_createargs create;
+ struct nfs3_mkdirargs mkdir;
+ struct nfs3_symlinkargs symlink;
+ struct nfs3_mknodargs mknod;
+ } arg;
+ struct nfs3_diropres res;
+ struct nfs_fh fh;
+ struct nfs_fattr fattr;
+ struct nfs_fattr dir_attr;
+};
+
+static struct nfs3_createdata *nfs3_alloc_createdata(void)
+{
+ struct nfs3_createdata *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (data != NULL) {
+ data->msg.rpc_argp = &data->arg;
+ data->msg.rpc_resp = &data->res;
+ data->res.fh = &data->fh;
+ data->res.fattr = &data->fattr;
+ data->res.dir_attr = &data->dir_attr;
+ nfs_fattr_init(data->res.fattr);
+ nfs_fattr_init(data->res.dir_attr);
+ }
+ return data;
+}
+
+static struct dentry *
+nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
+{
+ int status;
+
+ status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
+ nfs_post_op_update_inode(dir, data->res.dir_attr);
+ if (status != 0)
+ return ERR_PTR(status);
+
+ return nfs_add_or_obtain(dentry, data->res.fh, data->res.fattr, NULL);
+}
+
+static void nfs3_free_createdata(struct nfs3_createdata *data)
+{
+ kfree(data);
+}
+
+/*
+ * Create a regular file.
+ */
+static int
+nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
+ int flags)
+{
+ struct posix_acl *default_acl, *acl;
+ struct nfs3_createdata *data;
+ struct dentry *d_alias;
+ int status = -ENOMEM;
+
+ dprintk("NFS call create %pd\n", dentry);
+
+ data = nfs3_alloc_createdata();
+ if (data == NULL)
+ goto out;
+
+ data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
+ data->arg.create.fh = NFS_FH(dir);
+ data->arg.create.name = dentry->d_name.name;
+ data->arg.create.len = dentry->d_name.len;
+ data->arg.create.sattr = sattr;
+
+ data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
+ if (flags & O_EXCL) {
+ data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
+ data->arg.create.verifier[0] = cpu_to_be32(jiffies);
+ data->arg.create.verifier[1] = cpu_to_be32(current->pid);
+ }
+
+ status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
+ if (status)
+ goto out;
+
+ for (;;) {
+ d_alias = nfs3_do_create(dir, dentry, data);
+ status = PTR_ERR_OR_ZERO(d_alias);
+
+ if (status != -ENOTSUPP)
+ break;
+ /* If the server doesn't support the exclusive creation
+ * semantics, try again with simple 'guarded' mode. */
+ switch (data->arg.create.createmode) {
+ case NFS3_CREATE_EXCLUSIVE:
+ data->arg.create.createmode = NFS3_CREATE_GUARDED;
+ break;
+
+ case NFS3_CREATE_GUARDED:
+ data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
+ break;
+
+ case NFS3_CREATE_UNCHECKED:
+ goto out_release_acls;
+ }
+ nfs_fattr_init(data->res.dir_attr);
+ nfs_fattr_init(data->res.fattr);
+ }
+
+ if (status != 0)
+ goto out_release_acls;
+
+ if (d_alias)
+ dentry = d_alias;
+
+ /* When we created the file with exclusive semantics, make
+ * sure we set the attributes afterwards. */
+ if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
+ dprintk("NFS call setattr (post-create)\n");
+
+ if (!(sattr->ia_valid & ATTR_ATIME_SET))
+ sattr->ia_valid |= ATTR_ATIME;
+ if (!(sattr->ia_valid & ATTR_MTIME_SET))
+ sattr->ia_valid |= ATTR_MTIME;
+
+ /* Note: we could use a guarded setattr here, but I'm
+ * not sure this buys us anything (and I'd have
+ * to revamp the NFSv3 XDR code) */
+ status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
+ nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
+ dprintk("NFS reply setattr (post-create): %d\n", status);
+ if (status != 0)
+ goto out_dput;
+ }
+
+ status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
+
+out_dput:
+ dput(d_alias);
+out_release_acls:
+ posix_acl_release(acl);
+ posix_acl_release(default_acl);
+out:
+ nfs3_free_createdata(data);
+ dprintk("NFS reply create: %d\n", status);
+ return status;
+}
+
+static int
+nfs3_proc_remove(struct inode *dir, struct dentry *dentry)
+{
+ struct nfs_removeargs arg = {
+ .fh = NFS_FH(dir),
+ .name = dentry->d_name,
+ };
+ struct nfs_removeres res;
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
+ .rpc_argp = &arg,
+ .rpc_resp = &res,
+ };
+ int status = -ENOMEM;
+
+ dprintk("NFS call remove %pd2\n", dentry);
+ res.dir_attr = nfs_alloc_fattr();
+ if (res.dir_attr == NULL)
+ goto out;
+
+ status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+ nfs_post_op_update_inode(dir, res.dir_attr);
+ nfs_free_fattr(res.dir_attr);
+out:
+ dprintk("NFS reply remove: %d\n", status);
+ return status;
+}
+
+static void
+nfs3_proc_unlink_setup(struct rpc_message *msg,
+ struct dentry *dentry,
+ struct inode *inode)
+{
+ msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
+}
+
+static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
+{
+ rpc_call_start(task);
+}
+
+static int
+nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
+{
+ struct nfs_removeres *res;
+ if (nfs3_async_handle_jukebox(task, dir))
+ return 0;
+ res = task->tk_msg.rpc_resp;
+ nfs_post_op_update_inode(dir, res->dir_attr);
+ return 1;
+}
+
+static void
+nfs3_proc_rename_setup(struct rpc_message *msg,
+ struct dentry *old_dentry,
+ struct dentry *new_dentry)
+{
+ msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
+}
+
+static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
+{
+ rpc_call_start(task);
+}
+
+static int
+nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
+ struct inode *new_dir)
+{
+ struct nfs_renameres *res;
+
+ if (nfs3_async_handle_jukebox(task, old_dir))
+ return 0;
+ res = task->tk_msg.rpc_resp;
+
+ nfs_post_op_update_inode(old_dir, res->old_fattr);
+ nfs_post_op_update_inode(new_dir, res->new_fattr);
+ return 1;
+}
+
+static int
+nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
+{
+ struct nfs3_linkargs arg = {
+ .fromfh = NFS_FH(inode),
+ .tofh = NFS_FH(dir),
+ .toname = name->name,
+ .tolen = name->len
+ };
+ struct nfs3_linkres res;
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
+ .rpc_argp = &arg,
+ .rpc_resp = &res,
+ };
+ int status = -ENOMEM;
+
+ dprintk("NFS call link %s\n", name->name);
+ res.fattr = nfs_alloc_fattr();
+ res.dir_attr = nfs_alloc_fattr();
+ if (res.fattr == NULL || res.dir_attr == NULL)
+ goto out;
+
+ status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+ nfs_post_op_update_inode(dir, res.dir_attr);
+ nfs_post_op_update_inode(inode, res.fattr);
+out:
+ nfs_free_fattr(res.dir_attr);
+ nfs_free_fattr(res.fattr);
+ dprintk("NFS reply link: %d\n", status);
+ return status;
+}
+
+static int
+nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
+ unsigned int len, struct iattr *sattr)
+{
+ struct nfs3_createdata *data;
+ struct dentry *d_alias;
+ int status = -ENOMEM;
+
+ if (len > NFS3_MAXPATHLEN)
+ return -ENAMETOOLONG;
+
+ dprintk("NFS call symlink %pd\n", dentry);
+
+ data = nfs3_alloc_createdata();
+ if (data == NULL)
+ goto out;
+ data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
+ data->arg.symlink.fromfh = NFS_FH(dir);
+ data->arg.symlink.fromname = dentry->d_name.name;
+ data->arg.symlink.fromlen = dentry->d_name.len;
+ data->arg.symlink.pages = &page;
+ data->arg.symlink.pathlen = len;
+ data->arg.symlink.sattr = sattr;
+
+ d_alias = nfs3_do_create(dir, dentry, data);
+ status = PTR_ERR_OR_ZERO(d_alias);
+
+ if (status == 0)
+ dput(d_alias);
+
+ nfs3_free_createdata(data);
+out:
+ dprintk("NFS reply symlink: %d\n", status);
+ return status;
+}
+
+static int
+nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
+{
+ struct posix_acl *default_acl, *acl;
+ struct nfs3_createdata *data;
+ struct dentry *d_alias;
+ int status = -ENOMEM;
+
+ dprintk("NFS call mkdir %pd\n", dentry);
+
+ data = nfs3_alloc_createdata();
+ if (data == NULL)
+ goto out;
+
+ status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
+ if (status)
+ goto out;
+
+ data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
+ data->arg.mkdir.fh = NFS_FH(dir);
+ data->arg.mkdir.name = dentry->d_name.name;
+ data->arg.mkdir.len = dentry->d_name.len;
+ data->arg.mkdir.sattr = sattr;
+
+ d_alias = nfs3_do_create(dir, dentry, data);
+ status = PTR_ERR_OR_ZERO(d_alias);
+
+ if (status != 0)
+ goto out_release_acls;
+
+ if (d_alias)
+ dentry = d_alias;
+
+ status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
+
+ dput(d_alias);
+out_release_acls:
+ posix_acl_release(acl);
+ posix_acl_release(default_acl);
+out:
+ nfs3_free_createdata(data);
+ dprintk("NFS reply mkdir: %d\n", status);
+ return status;
+}
+
+static int
+nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
+{
+ struct nfs_fattr *dir_attr;
+ struct nfs3_diropargs arg = {
+ .fh = NFS_FH(dir),
+ .name = name->name,
+ .len = name->len
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
+ .rpc_argp = &arg,
+ };
+ int status = -ENOMEM;
+
+ dprintk("NFS call rmdir %s\n", name->name);
+ dir_attr = nfs_alloc_fattr();
+ if (dir_attr == NULL)
+ goto out;
+
+ msg.rpc_resp = dir_attr;
+ status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+ nfs_post_op_update_inode(dir, dir_attr);
+ nfs_free_fattr(dir_attr);
+out:
+ dprintk("NFS reply rmdir: %d\n", status);
+ return status;
+}
+
+/*
+ * The READDIR implementation is somewhat hackish - we pass the user buffer
+ * to the encode function, which installs it in the receive iovec.
+ * The decode function itself doesn't perform any decoding, it just makes
+ * sure the reply is syntactically correct.
+ *
+ * Also note that this implementation handles both plain readdir and
+ * readdirplus.
+ */
+static int
+nfs3_proc_readdir(struct dentry *dentry, const struct cred *cred,
+ u64 cookie, struct page **pages, unsigned int count, bool plus)
+{
+ struct inode *dir = d_inode(dentry);
+ __be32 *verf = NFS_I(dir)->cookieverf;
+ struct nfs3_readdirargs arg = {
+ .fh = NFS_FH(dir),
+ .cookie = cookie,
+ .verf = {verf[0], verf[1]},
+ .plus = plus,
+ .count = count,
+ .pages = pages
+ };
+ struct nfs3_readdirres res = {
+ .verf = verf,
+ .plus = plus
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
+ .rpc_argp = &arg,
+ .rpc_resp = &res,
+ .rpc_cred = cred,
+ };
+ int status = -ENOMEM;
+
+ if (plus)
+ msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
+
+ dprintk("NFS call readdir%s %d\n",
+ plus? "plus" : "", (unsigned int) cookie);
+
+ res.dir_attr = nfs_alloc_fattr();
+ if (res.dir_attr == NULL)
+ goto out;
+
+ status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+
+ nfs_invalidate_atime(dir);
+ nfs_refresh_inode(dir, res.dir_attr);
+
+ nfs_free_fattr(res.dir_attr);
+out:
+ dprintk("NFS reply readdir%s: %d\n",
+ plus? "plus" : "", status);
+ return status;
+}
+
+static int
+nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
+ dev_t rdev)
+{
+ struct posix_acl *default_acl, *acl;
+ struct nfs3_createdata *data;
+ struct dentry *d_alias;
+ int status = -ENOMEM;
+
+ dprintk("NFS call mknod %pd %u:%u\n", dentry,
+ MAJOR(rdev), MINOR(rdev));
+
+ data = nfs3_alloc_createdata();
+ if (data == NULL)
+ goto out;
+
+ status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
+ if (status)
+ goto out;
+
+ data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
+ data->arg.mknod.fh = NFS_FH(dir);
+ data->arg.mknod.name = dentry->d_name.name;
+ data->arg.mknod.len = dentry->d_name.len;
+ data->arg.mknod.sattr = sattr;
+ data->arg.mknod.rdev = rdev;
+
+ switch (sattr->ia_mode & S_IFMT) {
+ case S_IFBLK:
+ data->arg.mknod.type = NF3BLK;
+ break;
+ case S_IFCHR:
+ data->arg.mknod.type = NF3CHR;
+ break;
+ case S_IFIFO:
+ data->arg.mknod.type = NF3FIFO;
+ break;
+ case S_IFSOCK:
+ data->arg.mknod.type = NF3SOCK;
+ break;
+ default:
+ status = -EINVAL;
+ goto out_release_acls;
+ }
+
+ d_alias = nfs3_do_create(dir, dentry, data);
+ status = PTR_ERR_OR_ZERO(d_alias);
+ if (status != 0)
+ goto out_release_acls;
+
+ if (d_alias)
+ dentry = d_alias;
+
+ status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
+
+ dput(d_alias);
+out_release_acls:
+ posix_acl_release(acl);
+ posix_acl_release(default_acl);
+out:
+ nfs3_free_createdata(data);
+ dprintk("NFS reply mknod: %d\n", status);
+ return status;
+}
+
+static int
+nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
+ struct nfs_fsstat *stat)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
+ .rpc_argp = fhandle,
+ .rpc_resp = stat,
+ };
+ int status;
+
+ dprintk("NFS call fsstat\n");
+ nfs_fattr_init(stat->fattr);
+ status = rpc_call_sync(server->client, &msg, 0);
+ dprintk("NFS reply fsstat: %d\n", status);
+ return status;
+}
+
+static int
+do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
+ struct nfs_fsinfo *info)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
+ .rpc_argp = fhandle,
+ .rpc_resp = info,
+ };
+ int status;
+
+ dprintk("NFS call fsinfo\n");
+ nfs_fattr_init(info->fattr);
+ status = rpc_call_sync(client, &msg, 0);
+ dprintk("NFS reply fsinfo: %d\n", status);
+ return status;
+}
+
+/*
+ * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
+ * nfs_create_server
+ */
+static int
+nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
+ struct nfs_fsinfo *info)
+{
+ int status;
+
+ status = do_proc_fsinfo(server->client, fhandle, info);
+ if (status && server->nfs_client->cl_rpcclient != server->client)
+ status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
+ return status;
+}
+
+static int
+nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
+ struct nfs_pathconf *info)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
+ .rpc_argp = fhandle,
+ .rpc_resp = info,
+ };
+ int status;
+
+ dprintk("NFS call pathconf\n");
+ nfs_fattr_init(info->fattr);
+ status = rpc_call_sync(server->client, &msg, 0);
+ dprintk("NFS reply pathconf: %d\n", status);
+ return status;
+}
+
+static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
+{
+ struct inode *inode = hdr->inode;
+ struct nfs_server *server = NFS_SERVER(inode);
+
+ if (hdr->pgio_done_cb != NULL)
+ return hdr->pgio_done_cb(task, hdr);
+
+ if (nfs3_async_handle_jukebox(task, inode))
+ return -EAGAIN;
+
+ if (task->tk_status >= 0 && !server->read_hdrsize)
+ cmpxchg(&server->read_hdrsize, 0, hdr->res.replen);
+
+ nfs_invalidate_atime(inode);
+ nfs_refresh_inode(inode, &hdr->fattr);
+ return 0;
+}
+
+static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
+ struct rpc_message *msg)
+{
+ msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
+ hdr->args.replen = NFS_SERVER(hdr->inode)->read_hdrsize;
+}
+
+static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
+ struct nfs_pgio_header *hdr)
+{
+ rpc_call_start(task);
+ return 0;
+}
+
+static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
+{
+ struct inode *inode = hdr->inode;
+
+ if (hdr->pgio_done_cb != NULL)
+ return hdr->pgio_done_cb(task, hdr);
+
+ if (nfs3_async_handle_jukebox(task, inode))
+ return -EAGAIN;
+ if (task->tk_status >= 0)
+ nfs_writeback_update_inode(hdr);
+ return 0;
+}
+
+static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
+ struct rpc_message *msg,
+ struct rpc_clnt **clnt)
+{
+ msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
+}
+
+static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
+{
+ rpc_call_start(task);
+}
+
+static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
+{
+ if (data->commit_done_cb != NULL)
+ return data->commit_done_cb(task, data);
+
+ if (nfs3_async_handle_jukebox(task, data->inode))
+ return -EAGAIN;
+ nfs_refresh_inode(data->inode, data->res.fattr);
+ return 0;
+}
+
+static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
+ struct rpc_clnt **clnt)
+{
+ msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
+}
+
+static void nfs3_nlm_alloc_call(void *data)
+{
+ struct nfs_lock_context *l_ctx = data;
+ if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
+ get_nfs_open_context(l_ctx->open_context);
+ nfs_get_lock_context(l_ctx->open_context);
+ }
+}
+
+static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
+{
+ struct nfs_lock_context *l_ctx = data;
+ if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
+ return nfs_async_iocounter_wait(task, l_ctx);
+ return false;
+
+}
+
+static void nfs3_nlm_release_call(void *data)
+{
+ struct nfs_lock_context *l_ctx = data;
+ struct nfs_open_context *ctx;
+ if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
+ ctx = l_ctx->open_context;
+ nfs_put_lock_context(l_ctx);
+ put_nfs_open_context(ctx);
+ }
+}
+
+static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
+ .nlmclnt_alloc_call = nfs3_nlm_alloc_call,
+ .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
+ .nlmclnt_release_call = nfs3_nlm_release_call,
+};
+
+static int
+nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
+{
+ struct inode *inode = file_inode(filp);
+ struct nfs_lock_context *l_ctx = NULL;
+ struct nfs_open_context *ctx = nfs_file_open_context(filp);
+ int status;
+
+ if (fl->fl_flags & FL_CLOSE) {
+ l_ctx = nfs_get_lock_context(ctx);
+ if (IS_ERR(l_ctx))
+ l_ctx = NULL;
+ else
+ set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
+ }
+
+ status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
+
+ if (l_ctx)
+ nfs_put_lock_context(l_ctx);
+
+ return status;
+}
+
+static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
+{
+ return 0;
+}
+
+static const struct inode_operations nfs3_dir_inode_operations = {
+ .create = nfs_create,
+ .lookup = nfs_lookup,
+ .link = nfs_link,
+ .unlink = nfs_unlink,
+ .symlink = nfs_symlink,
+ .mkdir = nfs_mkdir,
+ .rmdir = nfs_rmdir,
+ .mknod = nfs_mknod,
+ .rename = nfs_rename,
+ .permission = nfs_permission,
+ .getattr = nfs_getattr,
+ .setattr = nfs_setattr,
+#ifdef CONFIG_NFS_V3_ACL
+ .listxattr = nfs3_listxattr,
+ .get_acl = nfs3_get_acl,
+ .set_acl = nfs3_set_acl,
+#endif
+};
+
+static const struct inode_operations nfs3_file_inode_operations = {
+ .permission = nfs_permission,
+ .getattr = nfs_getattr,
+ .setattr = nfs_setattr,
+#ifdef CONFIG_NFS_V3_ACL
+ .listxattr = nfs3_listxattr,
+ .get_acl = nfs3_get_acl,
+ .set_acl = nfs3_set_acl,
+#endif
+};
+
+const struct nfs_rpc_ops nfs_v3_clientops = {
+ .version = 3, /* protocol version */
+ .dentry_ops = &nfs_dentry_operations,
+ .dir_inode_ops = &nfs3_dir_inode_operations,
+ .file_inode_ops = &nfs3_file_inode_operations,
+ .file_ops = &nfs_file_operations,
+ .nlmclnt_ops = &nlmclnt_fl_close_lock_ops,
+ .getroot = nfs3_proc_get_root,
+ .submount = nfs_submount,
+ .try_get_tree = nfs_try_get_tree,
+ .getattr = nfs3_proc_getattr,
+ .setattr = nfs3_proc_setattr,
+ .lookup = nfs3_proc_lookup,
+ .access = nfs3_proc_access,
+ .readlink = nfs3_proc_readlink,
+ .create = nfs3_proc_create,
+ .remove = nfs3_proc_remove,
+ .unlink_setup = nfs3_proc_unlink_setup,
+ .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
+ .unlink_done = nfs3_proc_unlink_done,
+ .rename_setup = nfs3_proc_rename_setup,
+ .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
+ .rename_done = nfs3_proc_rename_done,
+ .link = nfs3_proc_link,
+ .symlink = nfs3_proc_symlink,
+ .mkdir = nfs3_proc_mkdir,
+ .rmdir = nfs3_proc_rmdir,
+ .readdir = nfs3_proc_readdir,
+ .mknod = nfs3_proc_mknod,
+ .statfs = nfs3_proc_statfs,
+ .fsinfo = nfs3_proc_fsinfo,
+ .pathconf = nfs3_proc_pathconf,
+ .decode_dirent = nfs3_decode_dirent,
+ .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
+ .read_setup = nfs3_proc_read_setup,
+ .read_done = nfs3_read_done,
+ .write_setup = nfs3_proc_write_setup,
+ .write_done = nfs3_write_done,
+ .commit_setup = nfs3_proc_commit_setup,
+ .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
+ .commit_done = nfs3_commit_done,
+ .lock = nfs3_proc_lock,
+ .clear_acl_cache = forget_all_cached_acls,
+ .close_context = nfs_close_context,
+ .have_delegation = nfs3_have_delegation,
+ .alloc_client = nfs_alloc_client,
+ .init_client = nfs_init_client,
+ .free_client = nfs_free_client,
+ .create_server = nfs3_create_server,
+ .clone_server = nfs3_clone_server,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 06:30:49 +0000