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| author | Steve French <smfrench@gmail.com> | 2013-07-04 14:38:48 -0500 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2013-07-04 14:38:48 -0500 |
| commit | 6658b9f70ebca5fc0795b1d6d733996af1e2caa7 (patch) | |
| tree | 69227c172bf861db86ab38619d247b36e4e16683 /fs/cifs/inode.c | |
| parent | 95dc8dd14e2e84cc3adabc8310768c13758e7d96 (diff) | |
| download | lwn-6658b9f70ebca5fc0795b1d6d733996af1e2caa7.tar.gz lwn-6658b9f70ebca5fc0795b1d6d733996af1e2caa7.zip | |
[CIFS] use sensible file nlink values if unprovided
Certain servers may not set the NumberOfLinks field in query file/path
info responses. In such a case, cifs_inode_needs_reval() assumes that
all regular files are hardlinks and triggers revalidation, leading to
excessive and unnecessary network traffic.
This change hardcodes cf_nlink (and subsequently i_nlink) when not
returned by the server, similar to what already occurs in cifs_mkdir().
Cc: <stable@vger.kernel.org>
Signed-off-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/inode.c')
| -rw-r--r-- | fs/cifs/inode.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 20efd81266c6..449b6cf09b09 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -558,6 +558,11 @@ cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, fattr->cf_mode &= ~(S_IWUGO); fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); + if (fattr->cf_nlink < 1) { + cifs_dbg(1, "replacing bogus file nlink value %u\n", + fattr->cf_nlink); + fattr->cf_nlink = 1; + } } fattr->cf_uid = cifs_sb->mnt_uid; |