This is a note to let you know that I've just added the patch titled
CIFS use sensible file nlink values if unprovided
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cifs-use-sensible-file-nlink-values-if-unprovided.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6658b9f70ebca5fc0795b1d6d733996af1e2caa7 Mon Sep 17 00:00:00 2001
From: Steve French <smfrench@xxxxxxxxx>
Date: Thu, 4 Jul 2013 14:38:48 -0500
Subject: CIFS use sensible file nlink values if unprovided
From: Steve French <smfrench@xxxxxxxxx>
commit 6658b9f70ebca5fc0795b1d6d733996af1e2caa7 upstream.
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().
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
Signed-off-by: Steve French <smfrench@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/inode.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -549,6 +549,11 @@ cifs_all_info_to_fattr(struct cifs_fattr
fattr->cf_mode &= ~(S_IWUGO);
fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
+ if (fattr->cf_nlink < 1) {
+ cFYI(1, "replacing bogus file nlink value %u\n",
+ fattr->cf_nlink);
+ fattr->cf_nlink = 1;
+ }
}
fattr->cf_uid = cifs_sb->mnt_uid;
Patches currently in stable-queue which might be from smfrench@xxxxxxxxx are
queue-3.4/cifs-use-sensible-file-nlink-values-if-unprovided.patch
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