ceph: add dir_layout to inode
Add a ceph_dir_layout to the inode, and calculate dentry hash values based
on the parent directory's specified dir_hash function. This is needed
because the old default Linux dcache hash function is extremely week and
leads to a poor distribution of files among dir fragments.
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 2297d94..e410561 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -59,7 +59,7 @@
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;
+ cfh->parent_name_hash = ceph_dentry_hash(parent);
*max_len = connected_handle_length;
type = 2;
} else if (*max_len >= handle_length) {