char/block device file can't be opened with dentry_open() if device driver
is not loaded. Use O_PATH flags for fake openning file to handle it if file
is a block or char file.
Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
---
fs/smb/server/smb2pdu.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index 72af3ab40b5c..7460089c186f 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -2052,18 +2052,20 @@ int smb2_tree_connect(struct ksmbd_work *work)
* @access: file access flags
* @disposition: file disposition flags
* @may_flags: set with MAY_ flags
- * @is_dir: is creating open flags for directory
+ * @coptions: file creation options
+ * @mode: file mode
*
* Return: file open flags
*/
static int smb2_create_open_flags(bool file_present, __le32 access,
__le32 disposition,
int *may_flags,
- bool is_dir)
+ __le32 coptions,
+ umode_t mode)
{
int oflags = O_NONBLOCK | O_LARGEFILE;
- if (is_dir) {
+ if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) {
access &= ~FILE_WRITE_DESIRE_ACCESS_LE;
ksmbd_debug(SMB, "Discard write access to a directory\n");
}
@@ -2080,7 +2082,7 @@ static int smb2_create_open_flags(bool file_present, __le32 access,
*may_flags = MAY_OPEN | MAY_READ;
}
- if (access == FILE_READ_ATTRIBUTES_LE)
+ if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode))
oflags |= O_PATH;
if (file_present) {
@@ -3175,8 +3177,8 @@ int smb2_open(struct ksmbd_work *work)
open_flags = smb2_create_open_flags(file_present, daccess,
req->CreateDisposition,
&may_flags,
- req->CreateOptions & FILE_DIRECTORY_FILE_LE ||
- (file_present && S_ISDIR(d_inode(path.dentry)->i_mode)));
+ req->CreateOptions,
+ file_present ? d_inode(path.dentry)->i_mode : 0);
if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
if (open_flags & (O_CREAT | O_TRUNC)) {
--
2.25.1
