nfs: get clone_blksize when probing fsinfo

[linux-2.6-block.git] / fs / nfs / nfs4xdr.c

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 868472b6b303b280bee69100077949d3bd6db698..9f656791a3389ed86695a3859d6f6424d67e16b9 100644 (file)
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4764,6 +4764,28 @@ static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
        return 0;
 }
 
+/*
+ * The granularity of a CLONE operation.
+ */
+static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
+                                    uint32_t *res)
+{
+       __be32 *p;
+
+       dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
+       *res = 0;
+       if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
+               p = xdr_inline_decode(xdr, 4);
+               if (unlikely(!p)) {
+                       print_overflow_msg(__func__, xdr);
+                       return -EIO;
+               }
+               *res = be32_to_cpup(p);
+               bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
+       }
+       return 0;
+}
+
 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
 {
        unsigned int savep;
@@ -4796,6 +4818,9 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
        if (status != 0)
                goto xdr_error;
        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
+       if (status)
+               goto xdr_error;
+       status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
        if (status)
                goto xdr_error;