From eb85d94bdd91fb4dbea4ee465d4349cbea4eaaca Mon Sep 17 00:00:00 2001 From: Pavel Shilovsky Date: Wed, 23 Oct 2013 17:49:47 +0400 Subject: 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: Acked-by: Jeff Layton Reported-and-tested-by: Joao Correia Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French --- fs/cifs/smb1ops.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) (limited to 'fs/cifs/smb1ops.c') diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index 384cffe42850..5f5ba0dc2ee1 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -534,10 +534,12 @@ cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, static int cifs_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 *adjustTZ) + FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink) { int rc; + *symlink = false; + /* could do find first instead but this returns more info */ rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & @@ -554,6 +556,23 @@ cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, CIFS_MOUNT_MAP_SPECIAL_CHR); *adjustTZ = true; } + + if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) { + int tmprc; + int oplock = 0; + __u16 netfid; + + /* Need to check if this is a symbolic link or not */ + tmprc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, + FILE_READ_ATTRIBUTES, 0, &netfid, &oplock, + NULL, cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + if (tmprc == -EOPNOTSUPP) + *symlink = true; + else + CIFSSMBClose(xid, tcon, netfid); + } + return rc; } -- cgit v1.2.3-55-g7522