[Cluster-devel] [PATCH 14/19] GFS2: Wait for iopen glock dequeues

[Bob Peterson]

This patch changes every glock_dq for iopen glocks into a dq_wait.
This makes sure that iopen glocks do not outlive the inode itself.
In turn, that ensures that anyone trying to unlink the glock will
be able to find the inode when it receives a remote iopen callback.

Signed-off-by: Bob Peterson <rpeterso at redhat.com>
Acked-by: Steven Whitehouse <swhiteho at redhat.com>
---
 fs/gfs2/inode.c | 3 ++-
 fs/gfs2/super.c | 8 +++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index a8ce2e9..bf2af04 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -191,7 +191,8 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 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);
+	gfs2_glock_dq_wait(&ip->i_iopen_gh);
+	gfs2_holder_uninit(&ip->i_iopen_gh);
 fail_iopen:
 	if (io_gl)
 		gfs2_glock_put(io_gl);
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 1e7da38..4f0708f 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1533,7 +1533,8 @@ static void gfs2_evict_inode(struct inode *inode)
 	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);
+		gfs2_glock_dq_wait(&ip->i_iopen_gh);
+		gfs2_holder_uninit(&ip->i_iopen_gh);
 		goto out;
 	}
 
@@ -1605,7 +1606,7 @@ out_unlock:
 
 	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_glock_dq_wait(&ip->i_iopen_gh);
 	}
 	gfs2_holder_uninit(&ip->i_iopen_gh);
 	gfs2_glock_dq_uninit(&gh);
@@ -1626,7 +1627,8 @@ out:
 	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);
+		gfs2_glock_dq_wait(&ip->i_iopen_gh);
+		gfs2_holder_uninit(&ip->i_iopen_gh);
 	}
 }
 
-- 
2.5.0