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GFS2: Fix locking bug in rename

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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 <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2009-12-09 13:55:12 +00:00
parent 56aa616a03
commit 24b977b5fd
1 changed files with 4 additions and 2 deletions
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6
fs/gfs2/ops_inode.c
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@ -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;