[GFS2] Add superblock into key for glock lookups

This adds the superblock as a key for glock lookups. Since the glocks
are already stored in a per-superblock table, this has no effect at
the moment. Later on this will change though.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 679cb836ed0c..b8ccb27906e8 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -200,6 +200,7 @@ static inline int queue_empty(struct gfs2_glock *gl, struct list_head *head)
  */
 
 static struct gfs2_glock *search_bucket(struct gfs2_gl_hash_bucket *bucket,
+                                        const struct gfs2_sbd *sdp,
                                         const struct lm_lockname *name)
 {
         struct gfs2_glock *gl;
@@ -209,6 +210,8 @@ static struct gfs2_glock *search_bucket(struct gfs2_gl_hash_bucket *bucket,
                         continue;
                 if (!lm_name_equal(&gl->gl_name, name))
                         continue;
+                if (gl->gl_sbd != sdp)
+                        continue;
 
                 kref_get(&gl->gl_ref);
 
@@ -233,7 +236,7 @@ static struct gfs2_glock *gfs2_glock_find(struct gfs2_sbd *sdp,
         struct gfs2_glock *gl;
 
         read_lock(&bucket->hb_lock);
-        gl = search_bucket(bucket, name);
+        gl = search_bucket(bucket, sdp, name);
         read_unlock(&bucket->hb_lock);
 
         return gl;
@@ -266,7 +269,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, uint64_t number,
         bucket = &sdp->sd_gl_hash[gl_hash(&name)];
 
         read_lock(&bucket->hb_lock);
-        gl = search_bucket(bucket, &name);
+        gl = search_bucket(bucket, sdp, &name);
         read_unlock(&bucket->hb_lock);
 
         if (gl || !create) {
@@ -311,7 +314,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, uint64_t number,
                 goto fail_aspace;
 
         write_lock(&bucket->hb_lock);
-        tmp = search_bucket(bucket, &name);
+        tmp = search_bucket(bucket, sdp, &name);
         if (tmp) {
                 write_unlock(&bucket->hb_lock);
                 glock_free(gl);