ceph: ensure rename target dentry fails revalidation
This works around a bug in vfs_rename_dir() that rehashes the target
dentry. Ensure such dentries always fail revalidation by timing out the
dentry lease and kicking it out of the current directory lease gen.
This can be reverted when the vfs bug is fixed.
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index db68468..8774b28 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -939,6 +939,10 @@
req->r_old_dentry->d_name.len,
req->r_old_dentry->d_name.name,
dn, dn->d_name.len, dn->d_name.name);
+ /* ensure target dentry is invalidated, despite
+ rehashing bug in vfs_rename_dir */
+ dn->d_time = jiffies;
+ ceph_dentry(dn)->lease_shared_gen = 0;
/* take overwritten dentry's readdir offset */
ceph_dentry(req->r_old_dentry)->offset =
ceph_dentry(dn)->offset;