nfs/blocklayout: Make sure calculate signature length aligned

Avoid a bad nfs server return an unaligned length of signature.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c
index 436bb303d856a0d94661afd6330e147a56426874..7d9f570e1b5216d9dc16081fd7862de4a5e0c9cb 100644 (file)
--- a/fs/nfs/blocklayout/dev.c
+++ b/fs/nfs/blocklayout/dev.c
@@ -89,7 +89,8 @@ nfs4_block_decode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b)
                        memcpy(&b->simple.sigs[i].sig, p,
                                b->simple.sigs[i].sig_len);
 
-                       b->simple.len += 8 + 4 + b->simple.sigs[i].sig_len;
+                       b->simple.len += 8 + 4 + \
+                               (XDR_QUADLEN(b->simple.sigs[i].sig_len) << 2);
                }
                break;
        case PNFS_BLOCK_VOLUME_SLICE: