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>
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 @@
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 @@
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);