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ksmbd: allow I/O on directory named streams

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Named streams are stored as extended attributes on the base inode. The
VFS read and write helpers reject directory inodes before or together
with checking whether the handle represents a stream.

Permit read and write operations when a directory-backed handle is a
named stream. Continue rejecting direct I/O on ordinary directory
handles.

This fixes creation of the directory stream in smb2.getinfo.complex.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Namjae Jeon 2026-07-05 16:01:27 +09:00
parent 4ea46ea602
commit 8184c425a1
1 changed files with 3 additions and 2 deletions
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5
fs/smb/server/vfs.c
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@ -345,7 +345,7 @@ int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count,
ssize_t nbytes = 0;
struct inode *inode = file_inode(filp);
if (S_ISDIR(inode->i_mode))
if (S_ISDIR(inode->i_mode) && !ksmbd_stream_fd(fp))
return -EISDIR;
if (unlikely(count == 0))
@ -474,7 +474,8 @@ int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
if (work->conn->connection_type) {
if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE)) ||
S_ISDIR(file_inode(fp->filp)->i_mode)) {
(S_ISDIR(file_inode(fp->filp)->i_mode) &&
!ksmbd_stream_fd(fp))) {
pr_err("no right to write(%pD)\n", fp->filp);
err = -EACCES;
goto out;