GFS2: Don't cache iopen glocks

Hi,

This patch makes GFS2 immediately reclaim/delete all iopen glocks as soon as they're dequeued. This allows deleters to get an EXclusive lock on iopen so files are deleted properly instead of being set as unlinked.

Regards,

Bob Peterson
Red Hat File Systems

Signed-off-by Bob Peterson <[email protected]>

---

fs/gfs2/inode.c +1 -0

index 8833a4f..62b484e 100644
@@ -189,6 +189,7 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 	return inode;
 
 fail_refresh:
+	ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
 	ip->i_iopen_gh.gh_gl->gl_object = NULL;
 	gfs2_glock_dq_uninit(&ip->i_iopen_gh);
 fail_iopen:

fs/gfs2/super.c +5 -1

index 917c8e1..e5639de 100644
@@ -1444,6 +1444,7 @@ static void gfs2_evict_inode(struct inode *inode)
 	/* Must not read inode block until block type has been verified */
 	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
 	if (unlikely(error)) {
+		ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
 		gfs2_glock_dq_uninit(&ip->i_iopen_gh);
 		goto out;
 	}

@@ -1514,8 +1515,10 @@ out_unlock:
 	if (gfs2_rs_active(ip->i_res))
 		gfs2_rs_deltree(ip->i_res);
 
-	if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags))
+	if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
+		ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
 		gfs2_glock_dq(&ip->i_iopen_gh);
+	}
 	gfs2_holder_uninit(&ip->i_iopen_gh);
 	gfs2_glock_dq_uninit(&gh);
 	if (error && error != GLR_TRYFAILED && error != -EROFS)

@@ -1534,6 +1537,7 @@ out:
 	ip->i_gl = NULL;
 	if (ip->i_iopen_gh.gh_gl) {
 		ip->i_iopen_gh.gh_gl->gl_object = NULL;
+		ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
 		gfs2_glock_dq_uninit(&ip->i_iopen_gh);
 	}
 }