leases: Send "this" as cookie to the timer handler

Issue:
timer-wheel implementation doesn't set the THIS to point
to the xlator who registered the timer, before calling
the handler. Hence referencing to THIS is any timer handler
will point to the global_xlator.

Fix: This is a bug from the timer wheel, but until that gets
fixed passing "this" as a cookie to the timer handler.

Change-Id: Ife1be56dc100372f9211e8fc7a885ac717cbcf47
BUG: 1319992
Signed-off-by: Poornima G <pgurusid@redhat.com>
Reviewed-on: http://review.gluster.org/14370
Smoke: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>

3 files changed, 27 insertions, 6 deletions

diff --git a/xlators/features/leases/src/leases-internal.c b/xlators/features/leases/src/leases-internal.c
index a52bf577b75..24e8389cbc6 100644
--- a/xlators/features/leases/src/leases-internal.c
+++ b/xlators/features/leases/src/leases-internal.c
@@ -826,12 +826,15 @@ void
 recall_lease_timer_handler (struct gf_tw_timer_list *timer,
                             void *data, unsigned long calltime)
 {
-        inode_t          *inode       = NULL;
-        lease_inode_t    *lease_inode = NULL;
-        leases_private_t *priv        = NULL;
+        inode_t                *inode       = NULL;
+        lease_inode_t          *lease_inode = NULL;
+        leases_private_t       *priv        = NULL;
+        lease_timer_data_t     *timer_data    = NULL;
 
-        priv = THIS->private;
-        inode = (inode_t *)data;
+        timer_data = data;
+
+        priv = timer_data->this->private;
+        inode = timer_data->inode;
         pthread_mutex_lock (&priv->mutex);
         {
                 lease_inode = new_lease_inode (inode);
@@ -859,6 +862,7 @@ __recall_lease (xlator_t *this, lease_inode_ctx_t *lease_ctx)
         int                                notify_ret    = -1;
         struct gf_tw_timer_list           *timer         = NULL;
         leases_private_t                  *priv          = NULL;
+        lease_timer_data_t                *timer_data    = NULL;
 
         if (lease_ctx->recall_in_progress) {
                 gf_msg_debug (this->name, 0, "Lease recall is already in "
@@ -896,8 +900,18 @@ __recall_lease (xlator_t *this, lease_inode_ctx_t *lease_ctx)
         if (!timer) {
                 goto out;
         }
+        timer_data = GF_CALLOC (1, sizeof (*timer_data),
+                                gf_leases_mt_timer_data_t);
+        if (!timer_data) {
+                GF_FREE (timer);
+                goto out;
+        }
+
+        timer_data->inode = inode_ref (lease_ctx->inode);
+        timer_data->this = this;
+        timer->data = timer_data;
+
         INIT_LIST_HEAD (&timer->entry);
-        timer->data = inode_ref (lease_ctx->inode);
         timer->expires = get_recall_lease_timeout (this);
         timer->function = recall_lease_timer_handler;
         lease_ctx->timer = timer;
diff --git a/xlators/features/leases/src/leases-mem-types.h b/xlators/features/leases/src/leases-mem-types.h
index 055da45be5d..d1a59c1db2e 100644
--- a/xlators/features/leases/src/leases-mem-types.h
+++ b/xlators/features/leases/src/leases-mem-types.h
@@ -22,6 +22,7 @@ enum gf_leases_mem_types_ {
         gf_leases_mt_lease_inode_ctx_t,
         gf_leases_mt_lease_id_entry_t,
         gf_leases_mt_fop_stub_t,
+        gf_leases_mt_timer_data_t,
         gf_leases_mt_end
 };
 #endif
diff --git a/xlators/features/leases/src/leases.h b/xlators/features/leases/src/leases.h
index 16143691075..c779f1a67e7 100644
--- a/xlators/features/leases/src/leases.h
+++ b/xlators/features/leases/src/leases.h
@@ -213,6 +213,12 @@ struct __fop_stub {
 };
 typedef struct __fop_stub fop_stub_t;
 
+struct __lease_timer_data {
+        inode_t *inode;
+        xlator_t *this;
+};
+typedef struct __lease_timer_data lease_timer_data_t;
+
 gf_boolean_t
 is_leases_enabled (xlator_t *this);