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authorBenny Halevy <bhalevy@panasas.com>2010-09-30 20:47:46 +0200
committerJ. Bruce Fields <bfields@redhat.com>2010-10-01 16:52:24 -0400
commit2b44f1ba40914777f4b1075254ba97663d4e2574 (patch)
tree1db499fcc1aadc447d11b7c901707db8f7b430d8 /fs/nfsd
parentc135e84afb6bcec9cb8ef0492fa4867efbfaad91 (diff)
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nfsd4: adjust buflen for encoded attrs bitmap based on actual bitmap length
The existing code adjusted it based on the worst case scenario for the returned bitmap and the best case scenario for the supported attrs attribute. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [bfields@redhat.com: removed likely/unlikely's] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4xdr.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 1a468bb..f35a94a 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1805,19 +1805,23 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
goto out_nfserr;
}
}
- if ((buflen -= 16) < 0)
- goto out_resource;
- if (unlikely(bmval2)) {
+ if (bmval2) {
+ if ((buflen -= 16) < 0)
+ goto out_resource;
WRITE32(3);
WRITE32(bmval0);
WRITE32(bmval1);
WRITE32(bmval2);
- } else if (likely(bmval1)) {
+ } else if (bmval1) {
+ if ((buflen -= 12) < 0)
+ goto out_resource;
WRITE32(2);
WRITE32(bmval0);
WRITE32(bmval1);
} else {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
WRITE32(1);
WRITE32(bmval0);
}
@@ -1828,15 +1832,17 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
u32 word1 = nfsd_suppattrs1(minorversion);
u32 word2 = nfsd_suppattrs2(minorversion);
- if ((buflen -= 12) < 0)
- goto out_resource;
if (!aclsupport)
word0 &= ~FATTR4_WORD0_ACL;
if (!word2) {
+ if ((buflen -= 12) < 0)
+ goto out_resource;
WRITE32(2);
WRITE32(word0);
WRITE32(word1);
} else {
+ if ((buflen -= 16) < 0)
+ goto out_resource;
WRITE32(3);
WRITE32(word0);
WRITE32(word1);