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-rw-r--r--fs/smb/server/vfs.c1933
1 files changed, 1933 insertions, 0 deletions
diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c
new file mode 100644
index 0000000000..4277750a6d
--- /dev/null
+++ b/fs/smb/server/vfs.c
@@ -0,0 +1,1933 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/filelock.h>
+#include <linux/uaccess.h>
+#include <linux/backing-dev.h>
+#include <linux/writeback.h>
+#include <linux/xattr.h>
+#include <linux/falloc.h>
+#include <linux/fsnotify.h>
+#include <linux/dcache.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/sched/xacct.h>
+#include <linux/crc32c.h>
+#include <linux/namei.h>
+
+#include "glob.h"
+#include "oplock.h"
+#include "connection.h"
+#include "vfs.h"
+#include "vfs_cache.h"
+#include "smbacl.h"
+#include "ndr.h"
+#include "auth.h"
+#include "misc.h"
+
+#include "smb_common.h"
+#include "mgmt/share_config.h"
+#include "mgmt/tree_connect.h"
+#include "mgmt/user_session.h"
+#include "mgmt/user_config.h"
+
+static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work,
+ struct inode *parent_inode,
+ struct inode *inode)
+{
+ if (!test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_INHERIT_OWNER))
+ return;
+
+ i_uid_write(inode, i_uid_read(parent_inode));
+}
+
+/**
+ * ksmbd_vfs_lock_parent() - lock parent dentry if it is stable
+ */
+int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child)
+{
+ inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);
+ if (child->d_parent != parent) {
+ inode_unlock(d_inode(parent));
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
+static int ksmbd_vfs_path_lookup_locked(struct ksmbd_share_config *share_conf,
+ char *pathname, unsigned int flags,
+ struct path *parent_path,
+ struct path *path)
+{
+ struct qstr last;
+ struct filename *filename;
+ struct path *root_share_path = &share_conf->vfs_path;
+ int err, type;
+ struct dentry *d;
+
+ if (pathname[0] == '\0') {
+ pathname = share_conf->path;
+ root_share_path = NULL;
+ } else {
+ flags |= LOOKUP_BENEATH;
+ }
+
+ filename = getname_kernel(pathname);
+ if (IS_ERR(filename))
+ return PTR_ERR(filename);
+
+ err = vfs_path_parent_lookup(filename, flags,
+ parent_path, &last, &type,
+ root_share_path);
+ if (err) {
+ putname(filename);
+ return err;
+ }
+
+ if (unlikely(type != LAST_NORM)) {
+ path_put(parent_path);
+ putname(filename);
+ return -ENOENT;
+ }
+
+ err = mnt_want_write(parent_path->mnt);
+ if (err) {
+ path_put(parent_path);
+ putname(filename);
+ return -ENOENT;
+ }
+
+ inode_lock_nested(parent_path->dentry->d_inode, I_MUTEX_PARENT);
+ d = lookup_one_qstr_excl(&last, parent_path->dentry, 0);
+ if (IS_ERR(d))
+ goto err_out;
+
+ if (d_is_negative(d)) {
+ dput(d);
+ goto err_out;
+ }
+
+ path->dentry = d;
+ path->mnt = mntget(parent_path->mnt);
+
+ if (test_share_config_flag(share_conf, KSMBD_SHARE_FLAG_CROSSMNT)) {
+ err = follow_down(path, 0);
+ if (err < 0) {
+ path_put(path);
+ goto err_out;
+ }
+ }
+
+ putname(filename);
+ return 0;
+
+err_out:
+ inode_unlock(d_inode(parent_path->dentry));
+ mnt_drop_write(parent_path->mnt);
+ path_put(parent_path);
+ putname(filename);
+ return -ENOENT;
+}
+
+void ksmbd_vfs_query_maximal_access(struct mnt_idmap *idmap,
+ struct dentry *dentry, __le32 *daccess)
+{
+ *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL);
+
+ if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_WRITE))
+ *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE |
+ FILE_WRITE_DATA | FILE_APPEND_DATA |
+ FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES |
+ FILE_DELETE_CHILD);
+
+ if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_READ))
+ *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE;
+
+ if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_EXEC))
+ *daccess |= FILE_EXECUTE_LE;
+
+ if (!inode_permission(idmap, d_inode(dentry->d_parent), MAY_EXEC | MAY_WRITE))
+ *daccess |= FILE_DELETE_LE;
+}
+
+/**
+ * ksmbd_vfs_create() - vfs helper for smb create file
+ * @work: work
+ * @name: file name that is relative to share
+ * @mode: file create mode
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode)
+{
+ struct path path;
+ struct dentry *dentry;
+ int err;
+
+ dentry = ksmbd_vfs_kern_path_create(work, name,
+ LOOKUP_NO_SYMLINKS, &path);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ if (err != -ENOENT)
+ pr_err("path create failed for %s, err %d\n",
+ name, err);
+ return err;
+ }
+
+ mode |= S_IFREG;
+ err = vfs_create(mnt_idmap(path.mnt), d_inode(path.dentry),
+ dentry, mode, true);
+ if (!err) {
+ ksmbd_vfs_inherit_owner(work, d_inode(path.dentry),
+ d_inode(dentry));
+ } else {
+ pr_err("File(%s): creation failed (err:%d)\n", name, err);
+ }
+
+ done_path_create(&path, dentry);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_mkdir() - vfs helper for smb create directory
+ * @work: work
+ * @name: directory name that is relative to share
+ * @mode: directory create mode
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)
+{
+ struct mnt_idmap *idmap;
+ struct path path;
+ struct dentry *dentry;
+ int err;
+
+ dentry = ksmbd_vfs_kern_path_create(work, name,
+ LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY,
+ &path);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ if (err != -EEXIST)
+ ksmbd_debug(VFS, "path create failed for %s, err %d\n",
+ name, err);
+ return err;
+ }
+
+ idmap = mnt_idmap(path.mnt);
+ mode |= S_IFDIR;
+ err = vfs_mkdir(idmap, d_inode(path.dentry), dentry, mode);
+ if (!err && d_unhashed(dentry)) {
+ struct dentry *d;
+
+ d = lookup_one(idmap, dentry->d_name.name, dentry->d_parent,
+ dentry->d_name.len);
+ if (IS_ERR(d)) {
+ err = PTR_ERR(d);
+ goto out_err;
+ }
+ if (unlikely(d_is_negative(d))) {
+ dput(d);
+ err = -ENOENT;
+ goto out_err;
+ }
+
+ ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d));
+ dput(d);
+ }
+
+out_err:
+ done_path_create(&path, dentry);
+ if (err)
+ pr_err("mkdir(%s): creation failed (err:%d)\n", name, err);
+ return err;
+}
+
+static ssize_t ksmbd_vfs_getcasexattr(struct mnt_idmap *idmap,
+ struct dentry *dentry, char *attr_name,
+ int attr_name_len, char **attr_value)
+{
+ char *name, *xattr_list = NULL;
+ ssize_t value_len = -ENOENT, xattr_list_len;
+
+ xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
+ if (xattr_list_len <= 0)
+ goto out;
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name));
+ if (strncasecmp(attr_name, name, attr_name_len))
+ continue;
+
+ value_len = ksmbd_vfs_getxattr(idmap,
+ dentry,
+ name,
+ attr_value);
+ if (value_len < 0)
+ pr_err("failed to get xattr in file\n");
+ break;
+ }
+
+out:
+ kvfree(xattr_list);
+ return value_len;
+}
+
+static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos,
+ size_t count)
+{
+ ssize_t v_len;
+ char *stream_buf = NULL;
+
+ ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n",
+ *pos, count);
+
+ v_len = ksmbd_vfs_getcasexattr(file_mnt_idmap(fp->filp),
+ fp->filp->f_path.dentry,
+ fp->stream.name,
+ fp->stream.size,
+ &stream_buf);
+ if ((int)v_len <= 0)
+ return (int)v_len;
+
+ if (v_len <= *pos) {
+ count = -EINVAL;
+ goto free_buf;
+ }
+
+ if (v_len - *pos < count)
+ count = v_len - *pos;
+
+ memcpy(buf, &stream_buf[*pos], count);
+
+free_buf:
+ kvfree(stream_buf);
+ return count;
+}
+
+/**
+ * check_lock_range() - vfs helper for smb byte range file locking
+ * @filp: the file to apply the lock to
+ * @start: lock start byte offset
+ * @end: lock end byte offset
+ * @type: byte range type read/write
+ *
+ * Return: 0 on success, otherwise error
+ */
+static int check_lock_range(struct file *filp, loff_t start, loff_t end,
+ unsigned char type)
+{
+ struct file_lock *flock;
+ struct file_lock_context *ctx = locks_inode_context(file_inode(filp));
+ int error = 0;
+
+ if (!ctx || list_empty_careful(&ctx->flc_posix))
+ return 0;
+
+ spin_lock(&ctx->flc_lock);
+ list_for_each_entry(flock, &ctx->flc_posix, fl_list) {
+ /* check conflict locks */
+ if (flock->fl_end >= start && end >= flock->fl_start) {
+ if (flock->fl_type == F_RDLCK) {
+ if (type == WRITE) {
+ pr_err("not allow write by shared lock\n");
+ error = 1;
+ goto out;
+ }
+ } else if (flock->fl_type == F_WRLCK) {
+ /* check owner in lock */
+ if (flock->fl_file != filp) {
+ error = 1;
+ pr_err("not allow rw access by exclusive lock from other opens\n");
+ goto out;
+ }
+ }
+ }
+ }
+out:
+ spin_unlock(&ctx->flc_lock);
+ return error;
+}
+
+/**
+ * ksmbd_vfs_read() - vfs helper for smb file read
+ * @work: smb work
+ * @fid: file id of open file
+ * @count: read byte count
+ * @pos: file pos
+ * @rbuf: read data buffer
+ *
+ * Return: number of read bytes on success, otherwise error
+ */
+int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count,
+ loff_t *pos, char *rbuf)
+{
+ struct file *filp = fp->filp;
+ ssize_t nbytes = 0;
+ struct inode *inode = file_inode(filp);
+
+ if (S_ISDIR(inode->i_mode))
+ return -EISDIR;
+
+ if (unlikely(count == 0))
+ return 0;
+
+ if (work->conn->connection_type) {
+ if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) {
+ pr_err("no right to read(%pD)\n", fp->filp);
+ return -EACCES;
+ }
+ }
+
+ if (ksmbd_stream_fd(fp))
+ return ksmbd_vfs_stream_read(fp, rbuf, pos, count);
+
+ if (!work->tcon->posix_extensions) {
+ int ret;
+
+ ret = check_lock_range(filp, *pos, *pos + count - 1, READ);
+ if (ret) {
+ pr_err("unable to read due to lock\n");
+ return -EAGAIN;
+ }
+ }
+
+ nbytes = kernel_read(filp, rbuf, count, pos);
+ if (nbytes < 0) {
+ pr_err("smb read failed, err = %zd\n", nbytes);
+ return nbytes;
+ }
+
+ filp->f_pos = *pos;
+ return nbytes;
+}
+
+static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos,
+ size_t count)
+{
+ char *stream_buf = NULL, *wbuf;
+ struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
+ size_t size;
+ ssize_t v_len;
+ int err = 0;
+
+ ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n",
+ *pos, count);
+
+ size = *pos + count;
+ if (size > XATTR_SIZE_MAX) {
+ size = XATTR_SIZE_MAX;
+ count = (*pos + count) - XATTR_SIZE_MAX;
+ }
+
+ v_len = ksmbd_vfs_getcasexattr(idmap,
+ fp->filp->f_path.dentry,
+ fp->stream.name,
+ fp->stream.size,
+ &stream_buf);
+ if (v_len < 0) {
+ pr_err("not found stream in xattr : %zd\n", v_len);
+ err = v_len;
+ goto out;
+ }
+
+ if (v_len < size) {
+ wbuf = kvzalloc(size, GFP_KERNEL);
+ if (!wbuf) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ if (v_len > 0)
+ memcpy(wbuf, stream_buf, v_len);
+ kvfree(stream_buf);
+ stream_buf = wbuf;
+ }
+
+ memcpy(&stream_buf[*pos], buf, count);
+
+ err = ksmbd_vfs_setxattr(idmap,
+ &fp->filp->f_path,
+ fp->stream.name,
+ (void *)stream_buf,
+ size,
+ 0,
+ true);
+ if (err < 0)
+ goto out;
+
+ fp->filp->f_pos = *pos;
+ err = 0;
+out:
+ kvfree(stream_buf);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_write() - vfs helper for smb file write
+ * @work: work
+ * @fid: file id of open file
+ * @buf: buf containing data for writing
+ * @count: read byte count
+ * @pos: file pos
+ * @sync: fsync after write
+ * @written: number of bytes written
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
+ char *buf, size_t count, loff_t *pos, bool sync,
+ ssize_t *written)
+{
+ struct file *filp;
+ loff_t offset = *pos;
+ int err = 0;
+
+ if (work->conn->connection_type) {
+ if (!(fp->daccess & FILE_WRITE_DATA_LE)) {
+ pr_err("no right to write(%pD)\n", fp->filp);
+ err = -EACCES;
+ goto out;
+ }
+ }
+
+ filp = fp->filp;
+
+ if (ksmbd_stream_fd(fp)) {
+ err = ksmbd_vfs_stream_write(fp, buf, pos, count);
+ if (!err)
+ *written = count;
+ goto out;
+ }
+
+ if (!work->tcon->posix_extensions) {
+ err = check_lock_range(filp, *pos, *pos + count - 1, WRITE);
+ if (err) {
+ pr_err("unable to write due to lock\n");
+ err = -EAGAIN;
+ goto out;
+ }
+ }
+
+ /* Reserve lease break for parent dir at closing time */
+ fp->reserve_lease_break = true;
+
+ /* Do we need to break any of a levelII oplock? */
+ smb_break_all_levII_oplock(work, fp, 1);
+
+ err = kernel_write(filp, buf, count, pos);
+ if (err < 0) {
+ ksmbd_debug(VFS, "smb write failed, err = %d\n", err);
+ goto out;
+ }
+
+ filp->f_pos = *pos;
+ *written = err;
+ err = 0;
+ if (sync) {
+ err = vfs_fsync_range(filp, offset, offset + *written, 0);
+ if (err < 0)
+ pr_err("fsync failed for filename = %pD, err = %d\n",
+ fp->filp, err);
+ }
+
+out:
+ return err;
+}
+
+/**
+ * ksmbd_vfs_getattr() - vfs helper for smb getattr
+ * @work: work
+ * @fid: file id of open file
+ * @attrs: inode attributes
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_getattr(const struct path *path, struct kstat *stat)
+{
+ int err;
+
+ err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT);
+ if (err)
+ pr_err("getattr failed, err %d\n", err);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_fsync() - vfs helper for smb fsync
+ * @work: work
+ * @fid: file id of open file
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id)
+{
+ struct ksmbd_file *fp;
+ int err;
+
+ fp = ksmbd_lookup_fd_slow(work, fid, p_id);
+ if (!fp) {
+ pr_err("failed to get filp for fid %llu\n", fid);
+ return -ENOENT;
+ }
+ err = vfs_fsync(fp->filp, 0);
+ if (err < 0)
+ pr_err("smb fsync failed, err = %d\n", err);
+ ksmbd_fd_put(work, fp);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink
+ * @name: directory or file name that is relative to share
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_remove_file(struct ksmbd_work *work, const struct path *path)
+{
+ struct mnt_idmap *idmap;
+ struct dentry *parent = path->dentry->d_parent;
+ int err;
+
+ if (ksmbd_override_fsids(work))
+ return -ENOMEM;
+
+ if (!d_inode(path->dentry)->i_nlink) {
+ err = -ENOENT;
+ goto out_err;
+ }
+
+ idmap = mnt_idmap(path->mnt);
+ if (S_ISDIR(d_inode(path->dentry)->i_mode)) {
+ err = vfs_rmdir(idmap, d_inode(parent), path->dentry);
+ if (err && err != -ENOTEMPTY)
+ ksmbd_debug(VFS, "rmdir failed, err %d\n", err);
+ } else {
+ err = vfs_unlink(idmap, d_inode(parent), path->dentry, NULL);
+ if (err)
+ ksmbd_debug(VFS, "unlink failed, err %d\n", err);
+ }
+
+out_err:
+ ksmbd_revert_fsids(work);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_link() - vfs helper for creating smb hardlink
+ * @oldname: source file name
+ * @newname: hardlink name that is relative to share
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname,
+ const char *newname)
+{
+ struct path oldpath, newpath;
+ struct dentry *dentry;
+ int err;
+
+ if (ksmbd_override_fsids(work))
+ return -ENOMEM;
+
+ err = kern_path(oldname, LOOKUP_NO_SYMLINKS, &oldpath);
+ if (err) {
+ pr_err("cannot get linux path for %s, err = %d\n",
+ oldname, err);
+ goto out1;
+ }
+
+ dentry = ksmbd_vfs_kern_path_create(work, newname,
+ LOOKUP_NO_SYMLINKS | LOOKUP_REVAL,
+ &newpath);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ pr_err("path create err for %s, err %d\n", newname, err);
+ goto out2;
+ }
+
+ err = -EXDEV;
+ if (oldpath.mnt != newpath.mnt) {
+ pr_err("vfs_link failed err %d\n", err);
+ goto out3;
+ }
+
+ err = vfs_link(oldpath.dentry, mnt_idmap(newpath.mnt),
+ d_inode(newpath.dentry),
+ dentry, NULL);
+ if (err)
+ ksmbd_debug(VFS, "vfs_link failed err %d\n", err);
+
+out3:
+ done_path_create(&newpath, dentry);
+out2:
+ path_put(&oldpath);
+out1:
+ ksmbd_revert_fsids(work);
+ return err;
+}
+
+int ksmbd_vfs_rename(struct ksmbd_work *work, const struct path *old_path,
+ char *newname, int flags)
+{
+ struct dentry *old_parent, *new_dentry, *trap;
+ struct dentry *old_child = old_path->dentry;
+ struct path new_path;
+ struct qstr new_last;
+ struct renamedata rd;
+ struct filename *to;
+ struct ksmbd_share_config *share_conf = work->tcon->share_conf;
+ struct ksmbd_file *parent_fp;
+ int new_type;
+ int err, lookup_flags = LOOKUP_NO_SYMLINKS;
+
+ if (ksmbd_override_fsids(work))
+ return -ENOMEM;
+
+ to = getname_kernel(newname);
+ if (IS_ERR(to)) {
+ err = PTR_ERR(to);
+ goto revert_fsids;
+ }
+
+retry:
+ err = vfs_path_parent_lookup(to, lookup_flags | LOOKUP_BENEATH,
+ &new_path, &new_last, &new_type,
+ &share_conf->vfs_path);
+ if (err)
+ goto out1;
+
+ if (old_path->mnt != new_path.mnt) {
+ err = -EXDEV;
+ goto out2;
+ }
+
+ err = mnt_want_write(old_path->mnt);
+ if (err)
+ goto out2;
+
+ trap = lock_rename_child(old_child, new_path.dentry);
+
+ old_parent = dget(old_child->d_parent);
+ if (d_unhashed(old_child)) {
+ err = -EINVAL;
+ goto out3;
+ }
+
+ parent_fp = ksmbd_lookup_fd_inode(old_child->d_parent);
+ if (parent_fp) {
+ if (parent_fp->daccess & FILE_DELETE_LE) {
+ pr_err("parent dir is opened with delete access\n");
+ err = -ESHARE;
+ ksmbd_fd_put(work, parent_fp);
+ goto out3;
+ }
+ ksmbd_fd_put(work, parent_fp);
+ }
+
+ new_dentry = lookup_one_qstr_excl(&new_last, new_path.dentry,
+ lookup_flags | LOOKUP_RENAME_TARGET);
+ if (IS_ERR(new_dentry)) {
+ err = PTR_ERR(new_dentry);
+ goto out3;
+ }
+
+ if (d_is_symlink(new_dentry)) {
+ err = -EACCES;
+ goto out4;
+ }
+
+ if ((flags & RENAME_NOREPLACE) && d_is_positive(new_dentry)) {
+ err = -EEXIST;
+ goto out4;
+ }
+
+ if (old_child == trap) {
+ err = -EINVAL;
+ goto out4;
+ }
+
+ if (new_dentry == trap) {
+ err = -ENOTEMPTY;
+ goto out4;
+ }
+
+ rd.old_mnt_idmap = mnt_idmap(old_path->mnt),
+ rd.old_dir = d_inode(old_parent),
+ rd.old_dentry = old_child,
+ rd.new_mnt_idmap = mnt_idmap(new_path.mnt),
+ rd.new_dir = new_path.dentry->d_inode,
+ rd.new_dentry = new_dentry,
+ rd.flags = flags,
+ rd.delegated_inode = NULL,
+ err = vfs_rename(&rd);
+ if (err)
+ ksmbd_debug(VFS, "vfs_rename failed err %d\n", err);
+
+out4:
+ dput(new_dentry);
+out3:
+ dput(old_parent);
+ unlock_rename(old_parent, new_path.dentry);
+ mnt_drop_write(old_path->mnt);
+out2:
+ path_put(&new_path);
+
+ if (retry_estale(err, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
+out1:
+ putname(to);
+revert_fsids:
+ ksmbd_revert_fsids(work);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_truncate() - vfs helper for smb file truncate
+ * @work: work
+ * @fid: file id of old file
+ * @size: truncate to given size
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_truncate(struct ksmbd_work *work,
+ struct ksmbd_file *fp, loff_t size)
+{
+ int err = 0;
+ struct file *filp;
+
+ filp = fp->filp;
+
+ /* Do we need to break any of a levelII oplock? */
+ smb_break_all_levII_oplock(work, fp, 1);
+
+ if (!work->tcon->posix_extensions) {
+ struct inode *inode = file_inode(filp);
+
+ if (size < inode->i_size) {
+ err = check_lock_range(filp, size,
+ inode->i_size - 1, WRITE);
+ } else {
+ err = check_lock_range(filp, inode->i_size,
+ size - 1, WRITE);
+ }
+
+ if (err) {
+ pr_err("failed due to lock\n");
+ return -EAGAIN;
+ }
+ }
+
+ err = vfs_truncate(&filp->f_path, size);
+ if (err)
+ pr_err("truncate failed, err %d\n", err);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes
+ * @dentry: dentry of file for listing xattrs
+ * @list: destination buffer
+ * @size: destination buffer length
+ *
+ * Return: xattr list length on success, otherwise error
+ */
+ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list)
+{
+ ssize_t size;
+ char *vlist = NULL;
+
+ size = vfs_listxattr(dentry, NULL, 0);
+ if (size <= 0)
+ return size;
+
+ vlist = kvzalloc(size, GFP_KERNEL);
+ if (!vlist)
+ return -ENOMEM;
+
+ *list = vlist;
+ size = vfs_listxattr(dentry, vlist, size);
+ if (size < 0) {
+ ksmbd_debug(VFS, "listxattr failed\n");
+ kvfree(vlist);
+ *list = NULL;
+ }
+
+ return size;
+}
+
+static ssize_t ksmbd_vfs_xattr_len(struct mnt_idmap *idmap,
+ struct dentry *dentry, char *xattr_name)
+{
+ return vfs_getxattr(idmap, dentry, xattr_name, NULL, 0);
+}
+
+/**
+ * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value
+ * @idmap: idmap
+ * @dentry: dentry of file for getting xattrs
+ * @xattr_name: name of xattr name to query
+ * @xattr_buf: destination buffer xattr value
+ *
+ * Return: read xattr value length on success, otherwise error
+ */
+ssize_t ksmbd_vfs_getxattr(struct mnt_idmap *idmap,
+ struct dentry *dentry,
+ char *xattr_name, char **xattr_buf)
+{
+ ssize_t xattr_len;
+ char *buf;
+
+ *xattr_buf = NULL;
+ xattr_len = ksmbd_vfs_xattr_len(idmap, dentry, xattr_name);
+ if (xattr_len < 0)
+ return xattr_len;
+
+ buf = kmalloc(xattr_len + 1, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ xattr_len = vfs_getxattr(idmap, dentry, xattr_name,
+ (void *)buf, xattr_len);
+ if (xattr_len > 0)
+ *xattr_buf = buf;
+ else
+ kfree(buf);
+ return xattr_len;
+}
+
+/**
+ * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value
+ * @idmap: idmap of the relevant mount
+ * @path: path of dentry to set XATTR at
+ * @attr_name: xattr name for setxattr
+ * @attr_value: xattr value to set
+ * @attr_size: size of xattr value
+ * @flags: destination buffer length
+ * @get_write: get write access to a mount
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_setxattr(struct mnt_idmap *idmap,
+ const struct path *path, const char *attr_name,
+ void *attr_value, size_t attr_size, int flags,
+ bool get_write)
+{
+ int err;
+
+ if (get_write == true) {
+ err = mnt_want_write(path->mnt);
+ if (err)
+ return err;
+ }
+
+ err = vfs_setxattr(idmap,
+ path->dentry,
+ attr_name,
+ attr_value,
+ attr_size,
+ flags);
+ if (err)
+ ksmbd_debug(VFS, "setxattr failed, err %d\n", err);
+ if (get_write == true)
+ mnt_drop_write(path->mnt);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options
+ * @filp: file pointer for IO
+ * @options: smb IO options
+ */
+void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option)
+{
+ struct address_space *mapping;
+
+ mapping = filp->f_mapping;
+
+ if (!option || !mapping)
+ return;
+
+ if (option & FILE_WRITE_THROUGH_LE) {
+ filp->f_flags |= O_SYNC;
+ } else if (option & FILE_SEQUENTIAL_ONLY_LE) {
+ filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2;
+ spin_lock(&filp->f_lock);
+ filp->f_mode &= ~FMODE_RANDOM;
+ spin_unlock(&filp->f_lock);
+ } else if (option & FILE_RANDOM_ACCESS_LE) {
+ spin_lock(&filp->f_lock);
+ filp->f_mode |= FMODE_RANDOM;
+ spin_unlock(&filp->f_lock);
+ }
+}
+
+int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
+ loff_t off, loff_t len)
+{
+ smb_break_all_levII_oplock(work, fp, 1);
+ if (fp->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE)
+ return vfs_fallocate(fp->filp,
+ FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
+ off, len);
+
+ return vfs_fallocate(fp->filp,
+ FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE,
+ off, len);
+}
+
+int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
+ struct file_allocated_range_buffer *ranges,
+ unsigned int in_count, unsigned int *out_count)
+{
+ struct file *f = fp->filp;
+ struct inode *inode = file_inode(fp->filp);
+ loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end;
+ loff_t extent_start, extent_end;
+ int ret = 0;
+
+ if (start > maxbytes)
+ return -EFBIG;
+
+ if (!in_count)
+ return 0;
+
+ /*
+ * Shrink request scope to what the fs can actually handle.
+ */
+ if (length > maxbytes || (maxbytes - length) < start)
+ length = maxbytes - start;
+
+ if (start + length > inode->i_size)
+ length = inode->i_size - start;
+
+ *out_count = 0;
+ end = start + length;
+ while (start < end && *out_count < in_count) {
+ extent_start = vfs_llseek(f, start, SEEK_DATA);
+ if (extent_start < 0) {
+ if (extent_start != -ENXIO)
+ ret = (int)extent_start;
+ break;
+ }
+
+ if (extent_start >= end)
+ break;
+
+ extent_end = vfs_llseek(f, extent_start, SEEK_HOLE);
+ if (extent_end < 0) {
+ if (extent_end != -ENXIO)
+ ret = (int)extent_end;
+ break;
+ } else if (extent_start >= extent_end) {
+ break;
+ }
+
+ ranges[*out_count].file_offset = cpu_to_le64(extent_start);
+ ranges[(*out_count)++].length =
+ cpu_to_le64(min(extent_end, end) - extent_start);
+
+ start = extent_end;
+ }
+
+ return ret;
+}
+
+int ksmbd_vfs_remove_xattr(struct mnt_idmap *idmap,
+ const struct path *path, char *attr_name)
+{
+ int err;
+
+ err = mnt_want_write(path->mnt);
+ if (err)
+ return err;
+
+ err = vfs_removexattr(idmap, path->dentry, attr_name);
+ mnt_drop_write(path->mnt);
+
+ return err;
+}
+
+int ksmbd_vfs_unlink(struct file *filp)
+{
+ int err = 0;
+ struct dentry *dir, *dentry = filp->f_path.dentry;
+ struct mnt_idmap *idmap = file_mnt_idmap(filp);
+
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ return err;
+
+ dir = dget_parent(dentry);
+ err = ksmbd_vfs_lock_parent(dir, dentry);
+ if (err)
+ goto out;
+ dget(dentry);
+
+ if (S_ISDIR(d_inode(dentry)->i_mode))
+ err = vfs_rmdir(idmap, d_inode(dir), dentry);
+ else
+ err = vfs_unlink(idmap, d_inode(dir), dentry, NULL);
+
+ dput(dentry);
+ inode_unlock(d_inode(dir));
+ if (err)
+ ksmbd_debug(VFS, "failed to delete, err %d\n", err);
+out:
+ dput(dir);
+ mnt_drop_write(filp->f_path.mnt);
+
+ return err;
+}
+
+static bool __dir_empty(struct dir_context *ctx, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct ksmbd_readdir_data *buf;
+
+ buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
+ buf->dirent_count++;
+
+ return buf->dirent_count <= 2;
+}
+
+/**
+ * ksmbd_vfs_empty_dir() - check for empty directory
+ * @fp: ksmbd file pointer
+ *
+ * Return: true if directory empty, otherwise false
+ */
+int ksmbd_vfs_empty_dir(struct ksmbd_file *fp)
+{
+ int err;
+ struct ksmbd_readdir_data readdir_data;
+
+ memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data));
+
+ set_ctx_actor(&readdir_data.ctx, __dir_empty);
+ readdir_data.dirent_count = 0;
+
+ err = iterate_dir(fp->filp, &readdir_data.ctx);
+ if (readdir_data.dirent_count > 2)
+ err = -ENOTEMPTY;
+ else
+ err = 0;
+ return err;
+}
+
+static bool __caseless_lookup(struct dir_context *ctx, const char *name,
+ int namlen, loff_t offset, u64 ino,
+ unsigned int d_type)
+{
+ struct ksmbd_readdir_data *buf;
+ int cmp = -EINVAL;
+
+ buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
+
+ if (buf->used != namlen)
+ return true;
+ if (IS_ENABLED(CONFIG_UNICODE) && buf->um) {
+ const struct qstr q_buf = {.name = buf->private,
+ .len = buf->used};
+ const struct qstr q_name = {.name = name,
+ .len = namlen};
+
+ cmp = utf8_strncasecmp(buf->um, &q_buf, &q_name);
+ }
+ if (cmp < 0)
+ cmp = strncasecmp((char *)buf->private, name, namlen);
+ if (!cmp) {
+ memcpy((char *)buf->private, name, namlen);
+ buf->dirent_count = 1;
+ return false;
+ }
+ return true;
+}
+
+/**
+ * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory
+ * @dir: path info
+ * @name: filename to lookup
+ * @namelen: filename length
+ *
+ * Return: 0 on success, otherwise error
+ */
+static int ksmbd_vfs_lookup_in_dir(const struct path *dir, char *name,
+ size_t namelen, struct unicode_map *um)
+{
+ int ret;
+ struct file *dfilp;
+ int flags = O_RDONLY | O_LARGEFILE;
+ struct ksmbd_readdir_data readdir_data = {
+ .ctx.actor = __caseless_lookup,
+ .private = name,
+ .used = namelen,
+ .dirent_count = 0,
+ .um = um,
+ };
+
+ dfilp = dentry_open(dir, flags, current_cred());
+ if (IS_ERR(dfilp))
+ return PTR_ERR(dfilp);
+
+ ret = iterate_dir(dfilp, &readdir_data.ctx);
+ if (readdir_data.dirent_count > 0)
+ ret = 0;
+ fput(dfilp);
+ return ret;
+}
+
+/**
+ * ksmbd_vfs_kern_path_locked() - lookup a file and get path info
+ * @name: file path that is relative to share
+ * @flags: lookup flags
+ * @parent_path: if lookup succeed, return parent_path info
+ * @path: if lookup succeed, return path info
+ * @caseless: caseless filename lookup
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,
+ unsigned int flags, struct path *parent_path,
+ struct path *path, bool caseless)
+{
+ struct ksmbd_share_config *share_conf = work->tcon->share_conf;
+ int err;
+
+ err = ksmbd_vfs_path_lookup_locked(share_conf, name, flags, parent_path,
+ path);
+ if (!err)
+ return 0;
+
+ if (caseless) {
+ char *filepath;
+ size_t path_len, remain_len;
+
+ filepath = kstrdup(name, GFP_KERNEL);
+ if (!filepath)
+ return -ENOMEM;
+
+ path_len = strlen(filepath);
+ remain_len = path_len;
+
+ *parent_path = share_conf->vfs_path;
+ path_get(parent_path);
+
+ while (d_can_lookup(parent_path->dentry)) {
+ char *filename = filepath + path_len - remain_len;
+ char *next = strchrnul(filename, '/');
+ size_t filename_len = next - filename;
+ bool is_last = !next[0];
+
+ if (filename_len == 0)
+ break;
+
+ err = ksmbd_vfs_lookup_in_dir(parent_path, filename,
+ filename_len,
+ work->conn->um);
+ if (err)
+ goto out2;
+
+ next[0] = '\0';
+
+ err = vfs_path_lookup(share_conf->vfs_path.dentry,
+ share_conf->vfs_path.mnt,
+ filepath,
+ flags,
+ path);
+ if (err)
+ goto out2;
+ else if (is_last)
+ goto out1;
+ path_put(parent_path);
+ *parent_path = *path;
+
+ next[0] = '/';
+ remain_len -= filename_len + 1;
+ }
+
+ err = -EINVAL;
+out2:
+ path_put(parent_path);
+out1:
+ kfree(filepath);
+ }
+
+ if (!err) {
+ err = mnt_want_write(parent_path->mnt);
+ if (err) {
+ path_put(path);
+ path_put(parent_path);
+ return err;
+ }
+
+ err = ksmbd_vfs_lock_parent(parent_path->dentry, path->dentry);
+ if (err) {
+ path_put(path);
+ path_put(parent_path);
+ }
+ }
+ return err;
+}
+
+void ksmbd_vfs_kern_path_unlock(struct path *parent_path, struct path *path)
+{
+ inode_unlock(d_inode(parent_path->dentry));
+ mnt_drop_write(parent_path->mnt);
+ path_put(path);
+ path_put(parent_path);
+}
+
+struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
+ const char *name,
+ unsigned int flags,
+ struct path *path)
+{
+ char *abs_name;
+ struct dentry *dent;
+
+ abs_name = convert_to_unix_name(work->tcon->share_conf, name);
+ if (!abs_name)
+ return ERR_PTR(-ENOMEM);
+
+ dent = kern_path_create(AT_FDCWD, abs_name, path, flags);
+ kfree(abs_name);
+ return dent;
+}
+
+int ksmbd_vfs_remove_acl_xattrs(struct mnt_idmap *idmap,
+ const struct path *path)
+{
+ char *name, *xattr_list = NULL;
+ ssize_t xattr_list_len;
+ int err = 0;
+
+ xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
+ if (xattr_list_len < 0) {
+ goto out;
+ } else if (!xattr_list_len) {
+ ksmbd_debug(SMB, "empty xattr in the file\n");
+ goto out;
+ }
+
+ err = mnt_want_write(path->mnt);
+ if (err)
+ goto out;
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
+
+ if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
+ sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) ||
+ !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
+ sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) {
+ err = vfs_remove_acl(idmap, path->dentry, name);
+ if (err)
+ ksmbd_debug(SMB,
+ "remove acl xattr failed : %s\n", name);
+ }
+ }
+ mnt_drop_write(path->mnt);
+
+out:
+ kvfree(xattr_list);
+ return err;
+}
+
+int ksmbd_vfs_remove_sd_xattrs(struct mnt_idmap *idmap, const struct path *path)
+{
+ char *name, *xattr_list = NULL;
+ ssize_t xattr_list_len;
+ int err = 0;
+
+ xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
+ if (xattr_list_len < 0) {
+ goto out;
+ } else if (!xattr_list_len) {
+ ksmbd_debug(SMB, "empty xattr in the file\n");
+ goto out;
+ }
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
+
+ if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) {
+ err = ksmbd_vfs_remove_xattr(idmap, path, name);
+ if (err)
+ ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
+ }
+ }
+out:
+ kvfree(xattr_list);
+ return err;
+}
+
+static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct mnt_idmap *idmap,
+ struct inode *inode,
+ int acl_type)
+{
+ struct xattr_smb_acl *smb_acl = NULL;
+ struct posix_acl *posix_acls;
+ struct posix_acl_entry *pa_entry;
+ struct xattr_acl_entry *xa_entry;
+ int i;
+
+ if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
+ return NULL;
+
+ posix_acls = get_inode_acl(inode, acl_type);
+ if (IS_ERR_OR_NULL(posix_acls))
+ return NULL;
+
+ smb_acl = kzalloc(sizeof(struct xattr_smb_acl) +
+ sizeof(struct xattr_acl_entry) * posix_acls->a_count,
+ GFP_KERNEL);
+ if (!smb_acl)
+ goto out;
+
+ smb_acl->count = posix_acls->a_count;
+ pa_entry = posix_acls->a_entries;
+ xa_entry = smb_acl->entries;
+ for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) {
+ switch (pa_entry->e_tag) {
+ case ACL_USER:
+ xa_entry->type = SMB_ACL_USER;
+ xa_entry->uid = posix_acl_uid_translate(idmap, pa_entry);
+ break;
+ case ACL_USER_OBJ:
+ xa_entry->type = SMB_ACL_USER_OBJ;
+ break;
+ case ACL_GROUP:
+ xa_entry->type = SMB_ACL_GROUP;
+ xa_entry->gid = posix_acl_gid_translate(idmap, pa_entry);
+ break;
+ case ACL_GROUP_OBJ:
+ xa_entry->type = SMB_ACL_GROUP_OBJ;
+ break;
+ case ACL_OTHER:
+ xa_entry->type = SMB_ACL_OTHER;
+ break;
+ case ACL_MASK:
+ xa_entry->type = SMB_ACL_MASK;
+ break;
+ default:
+ pr_err("unknown type : 0x%x\n", pa_entry->e_tag);
+ goto out;
+ }
+
+ if (pa_entry->e_perm & ACL_READ)
+ xa_entry->perm |= SMB_ACL_READ;
+ if (pa_entry->e_perm & ACL_WRITE)
+ xa_entry->perm |= SMB_ACL_WRITE;
+ if (pa_entry->e_perm & ACL_EXECUTE)
+ xa_entry->perm |= SMB_ACL_EXECUTE;
+ }
+out:
+ posix_acl_release(posix_acls);
+ return smb_acl;
+}
+
+int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
+ struct mnt_idmap *idmap,
+ const struct path *path,
+ struct smb_ntsd *pntsd, int len,
+ bool get_write)
+{
+ int rc;
+ struct ndr sd_ndr = {0}, acl_ndr = {0};
+ struct xattr_ntacl acl = {0};
+ struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL;
+ struct dentry *dentry = path->dentry;
+ struct inode *inode = d_inode(dentry);
+
+ acl.version = 4;
+ acl.hash_type = XATTR_SD_HASH_TYPE_SHA256;
+ acl.current_time = ksmbd_UnixTimeToNT(current_time(inode));
+
+ memcpy(acl.desc, "posix_acl", 9);
+ acl.desc_len = 10;
+
+ pntsd->osidoffset =
+ cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF);
+ pntsd->gsidoffset =
+ cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF);
+ pntsd->dacloffset =
+ cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF);
+
+ acl.sd_buf = (char *)pntsd;
+ acl.sd_size = len;
+
+ rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash);
+ if (rc) {
+ pr_err("failed to generate hash for ndr acl\n");
+ return rc;
+ }
+
+ smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,
+ ACL_TYPE_ACCESS);
+ if (S_ISDIR(inode->i_mode))
+ def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,
+ ACL_TYPE_DEFAULT);
+
+ rc = ndr_encode_posix_acl(&acl_ndr, idmap, inode,
+ smb_acl, def_smb_acl);
+ if (rc) {
+ pr_err("failed to encode ndr to posix acl\n");
+ goto out;
+ }
+
+ rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset,
+ acl.posix_acl_hash);
+ if (rc) {
+ pr_err("failed to generate hash for ndr acl\n");
+ goto out;
+ }
+
+ rc = ndr_encode_v4_ntacl(&sd_ndr, &acl);
+ if (rc) {
+ pr_err("failed to encode ndr to posix acl\n");
+ goto out;
+ }
+
+ rc = ksmbd_vfs_setxattr(idmap, path,
+ XATTR_NAME_SD, sd_ndr.data,
+ sd_ndr.offset, 0, get_write);
+ if (rc < 0)
+ pr_err("Failed to store XATTR ntacl :%d\n", rc);
+
+ kfree(sd_ndr.data);
+out:
+ kfree(acl_ndr.data);
+ kfree(smb_acl);
+ kfree(def_smb_acl);
+ return rc;
+}
+
+int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn,
+ struct mnt_idmap *idmap,
+ struct dentry *dentry,
+ struct smb_ntsd **pntsd)
+{
+ int rc;
+ struct ndr n;
+ struct inode *inode = d_inode(dentry);
+ struct ndr acl_ndr = {0};
+ struct xattr_ntacl acl;
+ struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL;
+ __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0};
+
+ rc = ksmbd_vfs_getxattr(idmap, dentry, XATTR_NAME_SD, &n.data);
+ if (rc <= 0)
+ return rc;
+
+ n.length = rc;
+ rc = ndr_decode_v4_ntacl(&n, &acl);
+ if (rc)
+ goto free_n_data;
+
+ smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,
+ ACL_TYPE_ACCESS);
+ if (S_ISDIR(inode->i_mode))
+ def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,
+ ACL_TYPE_DEFAULT);
+
+ rc = ndr_encode_posix_acl(&acl_ndr, idmap, inode, smb_acl,
+ def_smb_acl);
+ if (rc) {
+ pr_err("failed to encode ndr to posix acl\n");
+ goto out_free;
+ }
+
+ rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash);
+ if (rc) {
+ pr_err("failed to generate hash for ndr acl\n");
+ goto out_free;
+ }
+
+ if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) {
+ pr_err("hash value diff\n");
+ rc = -EINVAL;
+ goto out_free;
+ }
+
+ *pntsd = acl.sd_buf;
+ if (acl.sd_size < sizeof(struct smb_ntsd)) {
+ pr_err("sd size is invalid\n");
+ goto out_free;
+ }
+
+ (*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) -
+ NDR_NTSD_OFFSETOF);
+ (*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) -
+ NDR_NTSD_OFFSETOF);
+ (*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) -
+ NDR_NTSD_OFFSETOF);
+
+ rc = acl.sd_size;
+out_free:
+ kfree(acl_ndr.data);
+ kfree(smb_acl);
+ kfree(def_smb_acl);
+ if (rc < 0) {
+ kfree(acl.sd_buf);
+ *pntsd = NULL;
+ }
+
+free_n_data:
+ kfree(n.data);
+ return rc;
+}
+
+int ksmbd_vfs_set_dos_attrib_xattr(struct mnt_idmap *idmap,
+ const struct path *path,
+ struct xattr_dos_attrib *da,
+ bool get_write)
+{
+ struct ndr n;
+ int err;
+
+ err = ndr_encode_dos_attr(&n, da);
+ if (err)
+ return err;
+
+ err = ksmbd_vfs_setxattr(idmap, path, XATTR_NAME_DOS_ATTRIBUTE,
+ (void *)n.data, n.offset, 0, get_write);
+ if (err)
+ ksmbd_debug(SMB, "failed to store dos attribute in xattr\n");
+ kfree(n.data);
+
+ return err;
+}
+
+int ksmbd_vfs_get_dos_attrib_xattr(struct mnt_idmap *idmap,
+ struct dentry *dentry,
+ struct xattr_dos_attrib *da)
+{
+ struct ndr n;
+ int err;
+
+ err = ksmbd_vfs_getxattr(idmap, dentry, XATTR_NAME_DOS_ATTRIBUTE,
+ (char **)&n.data);
+ if (err > 0) {
+ n.length = err;
+ if (ndr_decode_dos_attr(&n, da))
+ err = -EINVAL;
+ kfree(n.data);
+ } else {
+ ksmbd_debug(SMB, "failed to load dos attribute in xattr\n");
+ }
+
+ return err;
+}
+
+/**
+ * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format
+ * @p: destination buffer
+ * @ksmbd_kstat: ksmbd kstat wrapper
+ */
+void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat)
+{
+ struct file_directory_info *info = (struct file_directory_info *)(*p);
+ struct kstat *kstat = ksmbd_kstat->kstat;
+ u64 time;
+
+ info->FileIndex = 0;
+ info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
+ time = ksmbd_UnixTimeToNT(kstat->atime);
+ info->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(kstat->mtime);
+ info->LastWriteTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(kstat->ctime);
+ info->ChangeTime = cpu_to_le64(time);
+
+ if (ksmbd_kstat->file_attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
+ info->EndOfFile = 0;
+ info->AllocationSize = 0;
+ } else {
+ info->EndOfFile = cpu_to_le64(kstat->size);
+ info->AllocationSize = cpu_to_le64(kstat->blocks << 9);
+ }
+ info->ExtFileAttributes = ksmbd_kstat->file_attributes;
+
+ return info;
+}
+
+int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work,
+ struct mnt_idmap *idmap,
+ struct dentry *dentry,
+ struct ksmbd_kstat *ksmbd_kstat)
+{
+ u64 time;
+ int rc;
+
+ generic_fillattr(idmap, STATX_BASIC_STATS, d_inode(dentry),
+ ksmbd_kstat->kstat);
+
+ time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
+ ksmbd_kstat->create_time = time;
+
+ /*
+ * set default value for the case that store dos attributes is not yes
+ * or that acl is disable in server's filesystem and the config is yes.
+ */
+ if (S_ISDIR(ksmbd_kstat->kstat->mode))
+ ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_DIRECTORY_LE;
+ else
+ ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_ARCHIVE_LE;
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
+ struct xattr_dos_attrib da;
+
+ rc = ksmbd_vfs_get_dos_attrib_xattr(idmap, dentry, &da);
+ if (rc > 0) {
+ ksmbd_kstat->file_attributes = cpu_to_le32(da.attr);
+ ksmbd_kstat->create_time = da.create_time;
+ } else {
+ ksmbd_debug(VFS, "fail to load dos attribute.\n");
+ }
+ }
+
+ return 0;
+}
+
+ssize_t ksmbd_vfs_casexattr_len(struct mnt_idmap *idmap,
+ struct dentry *dentry, char *attr_name,
+ int attr_name_len)
+{
+ char *name, *xattr_list = NULL;
+ ssize_t value_len = -ENOENT, xattr_list_len;
+
+ xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
+ if (xattr_list_len <= 0)
+ goto out;
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name));
+ if (strncasecmp(attr_name, name, attr_name_len))
+ continue;
+
+ value_len = ksmbd_vfs_xattr_len(idmap, dentry, name);
+ break;
+ }
+
+out:
+ kvfree(xattr_list);
+ return value_len;
+}
+
+int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
+ size_t *xattr_stream_name_size, int s_type)
+{
+ char *type, *buf;
+
+ if (s_type == DIR_STREAM)
+ type = ":$INDEX_ALLOCATION";
+ else
+ type = ":$DATA";
+
+ buf = kasprintf(GFP_KERNEL, "%s%s%s",
+ XATTR_NAME_STREAM, stream_name, type);
+ if (!buf)
+ return -ENOMEM;
+
+ *xattr_stream_name = buf;
+ *xattr_stream_name_size = strlen(buf) + 1;
+
+ return 0;
+}
+
+int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
+ struct ksmbd_file *src_fp,
+ struct ksmbd_file *dst_fp,
+ struct srv_copychunk *chunks,
+ unsigned int chunk_count,
+ unsigned int *chunk_count_written,
+ unsigned int *chunk_size_written,
+ loff_t *total_size_written)
+{
+ unsigned int i;
+ loff_t src_off, dst_off, src_file_size;
+ size_t len;
+ int ret;
+
+ *chunk_count_written = 0;
+ *chunk_size_written = 0;
+ *total_size_written = 0;
+
+ if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) {
+ pr_err("no right to read(%pD)\n", src_fp->filp);
+ return -EACCES;
+ }
+ if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) {
+ pr_err("no right to write(%pD)\n", dst_fp->filp);
+ return -EACCES;
+ }
+
+ if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp))
+ return -EBADF;
+
+ smb_break_all_levII_oplock(work, dst_fp, 1);
+
+ if (!work->tcon->posix_extensions) {
+ for (i = 0; i < chunk_count; i++) {
+ src_off = le64_to_cpu(chunks[i].SourceOffset);
+ dst_off = le64_to_cpu(chunks[i].TargetOffset);
+ len = le32_to_cpu(chunks[i].Length);
+
+ if (check_lock_range(src_fp->filp, src_off,
+ src_off + len - 1, READ))
+ return -EAGAIN;
+ if (check_lock_range(dst_fp->filp, dst_off,
+ dst_off + len - 1, WRITE))
+ return -EAGAIN;
+ }
+ }
+
+ src_file_size = i_size_read(file_inode(src_fp->filp));
+
+ for (i = 0; i < chunk_count; i++) {
+ src_off = le64_to_cpu(chunks[i].SourceOffset);
+ dst_off = le64_to_cpu(chunks[i].TargetOffset);
+ len = le32_to_cpu(chunks[i].Length);
+
+ if (src_off + len > src_file_size)
+ return -E2BIG;
+
+ ret = vfs_copy_file_range(src_fp->filp, src_off,
+ dst_fp->filp, dst_off, len, 0);
+ if (ret == -EOPNOTSUPP || ret == -EXDEV)
+ ret = vfs_copy_file_range(src_fp->filp, src_off,
+ dst_fp->filp, dst_off, len,
+ COPY_FILE_SPLICE);
+ if (ret < 0)
+ return ret;
+
+ *chunk_count_written += 1;
+ *total_size_written += ret;
+ }
+ return 0;
+}
+
+void ksmbd_vfs_posix_lock_wait(struct file_lock *flock)
+{
+ wait_event(flock->fl_wait, !flock->fl_blocker);
+}
+
+int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout)
+{
+ return wait_event_interruptible_timeout(flock->fl_wait,
+ !flock->fl_blocker,
+ timeout);
+}
+
+void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock)
+{
+ locks_delete_block(flock);
+}
+
+int ksmbd_vfs_set_init_posix_acl(struct mnt_idmap *idmap,
+ struct path *path)
+{
+ struct posix_acl_state acl_state;
+ struct posix_acl *acls;
+ struct dentry *dentry = path->dentry;
+ struct inode *inode = d_inode(dentry);
+ int rc;
+
+ if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
+ return -EOPNOTSUPP;
+
+ ksmbd_debug(SMB, "Set posix acls\n");
+ rc = init_acl_state(&acl_state, 1);
+ if (rc)
+ return rc;
+
+ /* Set default owner group */
+ acl_state.owner.allow = (inode->i_mode & 0700) >> 6;
+ acl_state.group.allow = (inode->i_mode & 0070) >> 3;
+ acl_state.other.allow = inode->i_mode & 0007;
+ acl_state.users->aces[acl_state.users->n].uid = inode->i_uid;
+ acl_state.users->aces[acl_state.users->n++].perms.allow =
+ acl_state.owner.allow;
+ acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid;
+ acl_state.groups->aces[acl_state.groups->n++].perms.allow =
+ acl_state.group.allow;
+ acl_state.mask.allow = 0x07;
+
+ acls = posix_acl_alloc(6, GFP_KERNEL);
+ if (!acls) {
+ free_acl_state(&acl_state);
+ return -ENOMEM;
+ }
+ posix_state_to_acl(&acl_state, acls->a_entries);
+
+ rc = set_posix_acl(idmap, dentry, ACL_TYPE_ACCESS, acls);
+ if (rc < 0)
+ ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",
+ rc);
+ else if (S_ISDIR(inode->i_mode)) {
+ posix_state_to_acl(&acl_state, acls->a_entries);
+ rc = set_posix_acl(idmap, dentry, ACL_TYPE_DEFAULT, acls);
+ if (rc < 0)
+ ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",
+ rc);
+ }
+
+ free_acl_state(&acl_state);
+ posix_acl_release(acls);
+ return rc;
+}
+
+int ksmbd_vfs_inherit_posix_acl(struct mnt_idmap *idmap,
+ struct path *path, struct inode *parent_inode)
+{
+ struct posix_acl *acls;
+ struct posix_acl_entry *pace;
+ struct dentry *dentry = path->dentry;
+ struct inode *inode = d_inode(dentry);
+ int rc, i;
+
+ if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
+ return -EOPNOTSUPP;
+
+ acls = get_inode_acl(parent_inode, ACL_TYPE_DEFAULT);
+ if (IS_ERR_OR_NULL(acls))
+ return -ENOENT;
+ pace = acls->a_entries;
+
+ for (i = 0; i < acls->a_count; i++, pace++) {
+ if (pace->e_tag == ACL_MASK) {
+ pace->e_perm = 0x07;
+ break;
+ }
+ }
+
+ rc = set_posix_acl(idmap, dentry, ACL_TYPE_ACCESS, acls);
+ if (rc < 0)
+ ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",
+ rc);
+ if (S_ISDIR(inode->i_mode)) {
+ rc = set_posix_acl(idmap, dentry, ACL_TYPE_DEFAULT,
+ acls);
+ if (rc < 0)
+ ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",
+ rc);
+ }
+
+ posix_acl_release(acls);
+ return rc;
+}