Commit 6658b9f7 authored Jul 04, 2013 by Steve French

[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>

parent 95dc8dd1

fs/cifs/inode.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;