Author: kib
Date: Thu Jul 4 19:01:18 2013
New Revision: 252714
URL: http://svnweb.freebsd.org/changeset/base/252714
Log:
The tvp vnode on rename is usually unlinked. Drop the cached null
vnode for tvp to allow the free of the lower vnode, if needed.
PR: kern/180236
Tested by: smh
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Modified:
head/sys/fs/nullfs/null_vnops.c
Modified: head/sys/fs/nullfs/null_vnops.c
==============================================================================
--- head/sys/fs/nullfs/null_vnops.c Thu Jul 4 18:59:58 2013
(r252713)
+++ head/sys/fs/nullfs/null_vnops.c Thu Jul 4 19:01:18 2013
(r252714)
@@ -554,6 +554,7 @@ null_rename(struct vop_rename_args *ap)
struct vnode *fvp = ap->a_fvp;
struct vnode *fdvp = ap->a_fdvp;
struct vnode *tvp = ap->a_tvp;
+ struct null_node *tnn;
/* Check for cross-device rename. */
if ((fvp->v_mount != tdvp->v_mount) ||
@@ -568,7 +569,11 @@ null_rename(struct vop_rename_args *ap)
vrele(fvp);
return (EXDEV);
}
-
+
+ if (tvp != NULL) {
+ tnn = VTONULL(tvp);
+ tnn->null_flags |= NULLV_DROP;
+ }
return (null_bypass((struct vop_generic_args *)ap));
}
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