ceph: Fix return value of encode_fh function

encode_fh function should return 255 on error as done by other file
system to indicate EOVERFLOW. Also max_len is in sizeof(u32) units
and not in bytes.

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 4480cb1..387c582 100644 (file)
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -42,32 +42,34 @@ struct ceph_nfs_confh {
 static int ceph_encode_fh(struct dentry *dentry, u32 *rawfh, int *max_len,
                          int connectable)
 {
+       int type;
        struct ceph_nfs_fh *fh = (void *)rawfh;
        struct ceph_nfs_confh *cfh = (void *)rawfh;
        struct dentry *parent = dentry->d_parent;
        struct inode *inode = dentry->d_inode;
-       int type;
+       int connected_handle_length = sizeof(*cfh)/4;
+       int handle_length = sizeof(*fh)/4;
 
        /* don't re-export snaps */
        if (ceph_snap(inode) != CEPH_NOSNAP)
                return -EINVAL;
 
-       if (*max_len >= sizeof(*cfh)) {
+       if (*max_len >= connected_handle_length) {
                dout("encode_fh %p connectable\n", dentry);
                cfh->ino = ceph_ino(dentry->d_inode);
                cfh->parent_ino = ceph_ino(parent->d_inode);
                cfh->parent_name_hash = parent->d_name.hash;
-               *max_len = sizeof(*cfh);
+               *max_len = connected_handle_length;
                type = 2;
-       } else if (*max_len > sizeof(*fh)) {
+       } else if (*max_len >= handle_length) {
                if (connectable)
-                       return -ENOSPC;
+                       return 255;
                dout("encode_fh %p\n", dentry);
                fh->ino = ceph_ino(dentry->d_inode);
-               *max_len = sizeof(*fh);
+               *max_len = handle_length;
                type = 1;
        } else {
-               return -ENOSPC;
+               return 255;
        }
        return type;
 }