[PATCH 3.2 019/110] NFS: Fix size of NFSACL SETACL operations

From: Ben Hutchings
Date: Mon Aug 10 2015 - 06:17:08 EST


3.2.71-rc1 review patch. If anyone has any objections, please let me know.

------------------

From: Chuck Lever <chuck.lever@xxxxxxxxxx>

commit d683cc49daf7c5afca8cd9654aaa1bf63cdf2ad9 upstream.

When encoding the NFSACL SETACL operation, reserve just the estimated
size of the ACL rather than a fixed maximum. This eliminates needless
zero padding on the wire that the server ignores.

Fixes: ee5dc7732bd5 ('NFS: Fix "kernel BUG at fs/nfs/nfs3xdr.c:1338!"')
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
fs/nfs/nfs3xdr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -1333,7 +1333,7 @@ static void nfs3_xdr_enc_setacl3args(str
if (args->npages != 0)
xdr_write_pages(xdr, args->pages, 0, args->len);
else
- xdr_reserve_space(xdr, NFS_ACL_INLINE_BUFSIZE);
+ xdr_reserve_space(xdr, args->len);

error = nfsacl_encode(xdr->buf, base, args->inode,
(args->mask & NFS_ACL) ?

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