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| author |   Pavel Shilovsky <piastry@etersoft.ru> | 2013-10-23 17:49:47 +0400 |
|---|---|---|
| committer |   Steve French <smfrench@gmail.com> | 2013-11-11 16:31:03 -0600 |
| commit | eb85d94bdd91fb4dbea4ee465d4349cbea4eaaca (patch) | |
| tree | 217ed41bd6bdf55b5a7263d42ebab386f6377785 /fs/cifs/smb2inode.c | |
| parent | Merge tag 'ftrace-urgent-3.12-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace (diff) | |
| download | linux-dev-eb85d94bdd91fb4dbea4ee465d4349cbea4eaaca.tar.xz linux-dev-eb85d94bdd91fb4dbea4ee465d4349cbea4eaaca.zip | |
CIFS: Fix symbolic links usage
Now we treat any reparse point as a symbolic link and map it to a Unix
one that is not true in a common case due to many reparse point types
supported by SMB servers.
Distinguish reparse point types into two groups:
1) that can be accessed directly through a reparse point
(junctions, deduplicated files, NFS symlinks);
2) that need to be processed manually (Windows symbolic links, DFS);
and map only Windows symbolic links to Unix ones.
Cc: <stable@vger.kernel.org>
Acked-by: Jeff Layton <jlayton@redhat.com>
Reported-and-tested-by: Joao Correia <joaomiguelcorreia@gmail.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/smb2inode.c')
| -rw-r--r-- | fs/cifs/smb2inode.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c index 78ff88c467b9..84c012a6aba0 100644 --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -123,12 +123,13 @@ move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src) int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, - FILE_ALL_INFO *data, bool *adjust_tz) + FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink) { int rc; struct smb2_file_all_info *smb2_data; *adjust_tz = false; + *symlink = false; smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2, GFP_KERNEL); @@ -136,9 +137,16 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, return -ENOMEM; rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path, - FILE_READ_ATTRIBUTES, FILE_OPEN, - OPEN_REPARSE_POINT, smb2_data, - SMB2_OP_QUERY_INFO); + FILE_READ_ATTRIBUTES, FILE_OPEN, 0, + smb2_data, SMB2_OP_QUERY_INFO); + if (rc == -EOPNOTSUPP) { + *symlink = true; + /* Failed on a symbolic link - query a reparse point info */ + rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path, + FILE_READ_ATTRIBUTES, FILE_OPEN, + OPEN_REPARSE_POINT, smb2_data, + SMB2_OP_QUERY_INFO); + } if (rc) goto out; |