ceph: Update max_len with minimum required size

encode_fh on error should update max_len with minimum required
size, so that caller can redo the call with the reallocated buffer.
This is required with open by handle patch series

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 387c582..e38423e 100644 (file)
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -62,13 +62,16 @@ static int ceph_encode_fh(struct dentry *dentry, u32 *rawfh, int *max_len,
                *max_len = connected_handle_length;
                type = 2;
        } else if (*max_len >= handle_length) {
-               if (connectable)
+               if (connectable) {
+                       *max_len = connected_handle_length;
                        return 255;
+               }
                dout("encode_fh %p\n", dentry);
                fh->ino = ceph_ino(dentry->d_inode);
                *max_len = handle_length;
                type = 1;
        } else {
+               *max_len = handle_length;
                return 255;
        }
        return type;