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| author |   Paulo Alcantara <pc@cjr.nz> | 2022-10-03 18:43:50 -0300 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2022-10-13 09:36:04 -0500 |
| commit | 76894f3e2f71177747b8b4763fb180e800279585 (patch) | |
| tree | d0382d6389d324b5d7421ee960a60af74415b631 /fs/cifs/readdir.c | |
| parent | smb3: clarify multichannel warning (diff) | |
| download | linux-dev-76894f3e2f71177747b8b4763fb180e800279585.tar.xz linux-dev-76894f3e2f71177747b8b4763fb180e800279585.zip | |
cifs: improve symlink handling for smb2+
When creating inode for symlink, the client used to send below
requests to fill it in:
* create+query_info+close (STATUS_STOPPED_ON_SYMLINK)
* create(+reparse_flag)+query_info+close (set file attrs)
* create+ioctl(get_reparse)+close (query reparse tag)
and then for every access to the symlink dentry, the ->link() method
would send another:
* create+ioctl(get_reparse)+close (parse symlink)
So, in order to improve:
(i) Get rid of unnecessary roundtrips and then resolve symlinks as
follows:
* create+query_info+close (STATUS_STOPPED_ON_SYMLINK +
parse symlink + get reparse tag)
* create(+reparse_flag)+query_info+close (set file attrs)
(ii) Set the resolved symlink target directly in inode->i_link and
use simple_get_link() for ->link() to simply return it.
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/readdir.c')
| -rw-r--r-- | fs/cifs/readdir.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 1bb4624e768b..2d75ba5aaa8a 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -1011,6 +1011,8 @@ static int cifs_filldir(char *find_entry, struct file *file, cifs_unix_basic_to_fattr(&fattr, &((FILE_UNIX_INFO *)find_entry)->basic, cifs_sb); + if (S_ISLNK(fattr.cf_mode)) + fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; break; case SMB_FIND_FILE_INFO_STANDARD: cifs_std_info_to_fattr(&fattr, |