Author: pho
Date: Mon Oct 31 15:01:47 2011
New Revision: 226967
URL: http://svn.freebsd.org/changeset/base/226967
Log:
The kern_renameat() looks up the fvp using the DELETE flag, which causes
the removal of the name cache entry for fvp.
Reported by: Anton Yuzhaninov <citrin citrin ru>
In collaboration with: kib
MFC after: 1 week
Modified:
head/sys/ufs/ufs/ufs_vnops.c
Modified: head/sys/ufs/ufs/ufs_vnops.c
==============================================================================
--- head/sys/ufs/ufs/ufs_vnops.c Mon Oct 31 10:53:27 2011
(r226966)
+++ head/sys/ufs/ufs/ufs_vnops.c Mon Oct 31 15:01:47 2011
(r226967)
@@ -1519,6 +1519,13 @@ relock:
cache_purge(fdvp);
}
error = ufs_dirremove(fdvp, fip, fcnp->cn_flags, 0);
+ /*
+ * As the relookup of the fvp is done in two steps:
+ * ufs_lookup_ino() and then VFS_VGET(), another thread might do a
+ * normal lookup of the from name just before the VFS_VGET() call,
+ * causing the cache entry to be re-instantiated.
+ */
+ cache_purge(fvp);
unlockout:
vput(fdvp);
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "[email protected]"
