exportfs: Return the minimum required handle size
The exportfs encode handle function should return the minimum required
handle size. This helps user to find out the handle size by passing 0
handle size in the first step and then redoing to the call again with
the returned handle size value.
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ocfs2/export.c b/fs/ocfs2/export.c
index 5dbc306..254652a 100644
--- a/fs/ocfs2/export.c
+++ b/fs/ocfs2/export.c
@@ -197,8 +197,12 @@
dentry->d_name.len, dentry->d_name.name,
fh, len, connectable);
- if (len < 3 || (connectable && len < 6)) {
- mlog(ML_ERROR, "fh buffer is too small for encoding\n");
+ if (connectable && (len < 6)) {
+ *max_len = 6;
+ type = 255;
+ goto bail;
+ } else if (len < 3) {
+ *max_len = 3;
type = 255;
goto bail;
}