From: Benny Halevy <bhalevy@panasas.com>
Date: Fri, 3 Apr 2009 05:29:08 +0000 (+0300)
Subject: nfsd: dynamically skip encoded fattr bitmap in _nfsd4_verify
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=95ec28cda323104bbff64fc7ec8ee4c9042e51fa;p=deliverable%2Flinux.git

nfsd: dynamically skip encoded fattr bitmap in _nfsd4_verify

_nfsd4_verify currently skips 3 words from the encoded buffer begining.
With support for 3-word attr bitmaps in nfsd41, nfsd4_encode_fattr
may encode 1, 2, or 3 words, and not always 2 as it used to be, hence
we need to find out where to skip using the encoded bitmap length.

Note: This patch may be applied over pre-nfsd41 nfsd.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
---

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 52bb14debb30..937853f62834 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -775,7 +775,8 @@ _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	if (status)
 		goto out_kfree;
 
-	p = buf + 3;
+	/* skip bitmap */
+	p = buf + 1 + ntohl(buf[0]);
 	status = nfserr_not_same;
 	if (ntohl(*p++) != verify->ve_attrlen)
 		goto out_kfree;