Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8497a46e178addb27ad1c981befaa17ca788b5c3
Commit:     8497a46e178addb27ad1c981befaa17ca788b5c3
Parent:     e9bd2b3bafd29bf75522546207f0bba0ec4515c2
Author:     Steven Whitehouse <[EMAIL PROTECTED]>
AuthorDate: Sun Aug 26 14:23:56 2007 +0100
Committer:  Steven Whitehouse <[EMAIL PROTECTED]>
CommitDate: Wed Oct 10 08:55:53 2007 +0100

    [GFS2] Correct lock ordering in unlink
    
    This patch corrects the lock ordering in unlink to be the same as
    that in the rest of GFS2, i.e. parent -> child -> rgrp.
    
    Signed-off-by: Steven Whitehouse <[EMAIL PROTECTED]>
---
 fs/gfs2/ops_inode.c |   29 ++++++++++++++++++++---------
 1 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 5b8b994..2cbe5a3 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -278,17 +278,25 @@ static int gfs2_unlink(struct inode *dir, struct dentry 
*dentry)
        gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
 
 
-       error = gfs2_glock_nq_m(3, ghs);
+       error = gfs2_glock_nq(ghs); /* parent */
        if (error)
-               goto out;
+               goto out_parent;
+
+       error = gfs2_glock_nq(ghs + 1); /* child */
+       if (error)
+               goto out_child;
+
+       error = gfs2_glock_nq(ghs + 2); /* rgrp */
+       if (error)
+               goto out_rgrp;
 
        error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
        if (error)
-               goto out_gunlock;
+               goto out_rgrp;
 
        error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0);
        if (error)
-               goto out_gunlock;
+               goto out_rgrp;
 
        error = gfs2_dir_del(dip, &dentry->d_name);
         if (error)
@@ -298,12 +306,15 @@ static int gfs2_unlink(struct inode *dir, struct dentry 
*dentry)
 
 out_end_trans:
        gfs2_trans_end(sdp);
-out_gunlock:
-       gfs2_glock_dq_m(3, ghs);
-out:
-       gfs2_holder_uninit(ghs);
-       gfs2_holder_uninit(ghs + 1);
+       gfs2_glock_dq(ghs + 2);
+out_rgrp:
        gfs2_holder_uninit(ghs + 2);
+       gfs2_glock_dq(ghs + 1);
+out_child:
+       gfs2_holder_uninit(ghs + 1);
+       gfs2_glock_dq(ghs);
+out_parent:
+       gfs2_holder_uninit(ghs);
        gfs2_glock_dq_uninit(&ri_gh);
        return error;
 }
-
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