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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>
This commit is contained in:
Sage Weil 2009-12-21 11:42:18 -08:00
parent 2baba25019
commit c4a29f26d5
1 changed files with 4 additions and 0 deletions
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4
fs/ceph/inode.c
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@ -939,6 +939,10 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
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;