nfs: get clone_blksize when probing fsinfo
NFSv42 CLONE operation is supposed to respect it.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 57c5a02..d6d5d2a 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -764,6 +764,7 @@
server->time_delta = fsinfo->time_delta;
+ server->clone_blksize = fsinfo->clone_blksize;
/* We're airborne Set socket buffersize */
rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 9688b1a..8814fbe 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -239,6 +239,7 @@
FATTR4_WORD1_TIME_DELTA
| FATTR4_WORD1_FS_LAYOUT_TYPES,
FATTR4_WORD2_LAYOUT_BLKSIZE
+ | FATTR4_WORD2_CLONE_BLKSIZE
};
const u32 nfs4_fs_locations_bitmap[3] = {
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 868472b..9f65679 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4764,6 +4764,28 @@
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;
@@ -4798,6 +4820,9 @@
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;
status = verify_attr_len(xdr, savep, attrlen);
xdr_error: