From 24b977b5fdea09bf356428870d32c09a275c8a3e Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Wed, 9 Dec 2009 13:55:12 +0000 Subject: [PATCH] GFS2: Fix locking bug in rename The rename code was taking a resource group lock in cases where it wasn't actually needed, this caused problems if the rename was resulting in an inode being unlinked. The patch ensures that we only take the rgrp lock early if it is really needed. Signed-off-by: Steven Whitehouse --- fs/gfs2/ops_inode.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 247436c..78f73ca 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -748,7 +748,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, struct gfs2_rgrpd *nrgd; unsigned int num_gh; int dir_rename = 0; - int alloc_required; + int alloc_required = 0; unsigned int x; int error; @@ -867,7 +867,9 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, goto out_gunlock; } - alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); + if (nip == NULL) + alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); + error = alloc_required; if (error < 0) goto out_gunlock; error = 0; -- 2.7.4