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-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.c9
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.h3
-rw-r--r--drivers/infiniband/ulp/iser/iser_verbs.c72
3 files changed, 46 insertions, 38 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 93399dff0c6f..7b2fc98e2f2b 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -325,7 +325,7 @@ iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn)
*/
if (ib_conn) {
ib_conn->iser_conn = NULL;
- iser_conn_put(ib_conn);
+ iser_conn_put(ib_conn, 1); /* deref iscsi/ib conn unbinding */
}
}
@@ -357,11 +357,12 @@ iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session,
/* binds the iSER connection retrieved from the previously
* connected ep_handle to the iSCSI layer connection. exchanges
* connection pointers */
- iser_err("binding iscsi conn %p to iser_conn %p\n",conn,ib_conn);
+ iser_err("binding iscsi/iser conn %p %p to ib_conn %p\n",
+ conn, conn->dd_data, ib_conn);
iser_conn = conn->dd_data;
ib_conn->iser_conn = iser_conn;
iser_conn->ib_conn = ib_conn;
- iser_conn_get(ib_conn);
+ iser_conn_get(ib_conn); /* ref iscsi/ib conn binding */
return 0;
}
@@ -382,7 +383,7 @@ iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
* There is no unbind event so the stop callback
* must release the ref from the bind.
*/
- iser_conn_put(ib_conn);
+ iser_conn_put(ib_conn, 1); /* deref iscsi/ib conn unbinding */
}
iser_conn->ib_conn = NULL;
}
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 53da74b45c75..f1df01567bb6 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -247,7 +247,6 @@ struct iser_conn {
struct rdma_cm_id *cma_id; /* CMA ID */
struct ib_qp *qp; /* QP */
struct ib_fmr_pool *fmr_pool; /* pool of IB FMRs */
- int disc_evt_flag; /* disconn event delivered */
wait_queue_head_t wait; /* waitq for conn/disconn */
int post_recv_buf_count; /* posted rx count */
atomic_t post_send_buf_count; /* posted tx count */
@@ -321,7 +320,7 @@ void iser_conn_init(struct iser_conn *ib_conn);
void iser_conn_get(struct iser_conn *ib_conn);
-void iser_conn_put(struct iser_conn *ib_conn);
+int iser_conn_put(struct iser_conn *ib_conn, int destroy_cma_id_allowed);
void iser_conn_terminate(struct iser_conn *ib_conn);
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index ed7c90135412..78fdecacea35 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -238,7 +238,7 @@ alloc_err:
* releases the FMR pool, QP and CMA ID objects, returns 0 on success,
* -1 on failure
*/
-static int iser_free_ib_conn_res(struct iser_conn *ib_conn)
+static int iser_free_ib_conn_res(struct iser_conn *ib_conn, int can_destroy_id)
{
BUG_ON(ib_conn == NULL);
@@ -253,7 +253,8 @@ static int iser_free_ib_conn_res(struct iser_conn *ib_conn)
if (ib_conn->qp != NULL)
rdma_destroy_qp(ib_conn->cma_id);
- if (ib_conn->cma_id != NULL)
+ /* if cma handler context, the caller acts s.t the cma destroy the id */
+ if (ib_conn->cma_id != NULL && can_destroy_id)
rdma_destroy_id(ib_conn->cma_id);
ib_conn->fmr_pool = NULL;
@@ -331,7 +332,7 @@ static int iser_conn_state_comp_exch(struct iser_conn *ib_conn,
/**
* Frees all conn objects and deallocs conn descriptor
*/
-static void iser_conn_release(struct iser_conn *ib_conn)
+static void iser_conn_release(struct iser_conn *ib_conn, int can_destroy_id)
{
struct iser_device *device = ib_conn->device;
@@ -341,7 +342,7 @@ static void iser_conn_release(struct iser_conn *ib_conn)
list_del(&ib_conn->conn_list);
mutex_unlock(&ig.connlist_mutex);
iser_free_rx_descriptors(ib_conn);
- iser_free_ib_conn_res(ib_conn);
+ iser_free_ib_conn_res(ib_conn, can_destroy_id);
ib_conn->device = NULL;
/* on EVENT_ADDR_ERROR there's no device yet for this conn */
if (device != NULL)
@@ -354,10 +355,13 @@ void iser_conn_get(struct iser_conn *ib_conn)
atomic_inc(&ib_conn->refcount);
}
-void iser_conn_put(struct iser_conn *ib_conn)
+int iser_conn_put(struct iser_conn *ib_conn, int can_destroy_id)
{
- if (atomic_dec_and_test(&ib_conn->refcount))
- iser_conn_release(ib_conn);
+ if (atomic_dec_and_test(&ib_conn->refcount)) {
+ iser_conn_release(ib_conn, can_destroy_id);
+ return 1;
+ }
+ return 0;
}
/**
@@ -381,19 +385,20 @@ void iser_conn_terminate(struct iser_conn *ib_conn)
wait_event_interruptible(ib_conn->wait,
ib_conn->state == ISER_CONN_DOWN);
- iser_conn_put(ib_conn);
+ iser_conn_put(ib_conn, 1); /* deref ib conn deallocate */
}
-static void iser_connect_error(struct rdma_cm_id *cma_id)
+static int iser_connect_error(struct rdma_cm_id *cma_id)
{
struct iser_conn *ib_conn;
ib_conn = (struct iser_conn *)cma_id->context;
ib_conn->state = ISER_CONN_DOWN;
wake_up_interruptible(&ib_conn->wait);
+ return iser_conn_put(ib_conn, 0); /* deref ib conn's cma id */
}
-static void iser_addr_handler(struct rdma_cm_id *cma_id)
+static int iser_addr_handler(struct rdma_cm_id *cma_id)
{
struct iser_device *device;
struct iser_conn *ib_conn;
@@ -402,8 +407,7 @@ static void iser_addr_handler(struct rdma_cm_id *cma_id)
device = iser_device_find_by_ib_device(cma_id);
if (!device) {
iser_err("device lookup/creation failed\n");
- iser_connect_error(cma_id);
- return;
+ return iser_connect_error(cma_id);
}
ib_conn = (struct iser_conn *)cma_id->context;
@@ -412,11 +416,13 @@ static void iser_addr_handler(struct rdma_cm_id *cma_id)
ret = rdma_resolve_route(cma_id, 1000);
if (ret) {
iser_err("resolve route failed: %d\n", ret);
- iser_connect_error(cma_id);
+ return iser_connect_error(cma_id);
}
+
+ return 0;
}
-static void iser_route_handler(struct rdma_cm_id *cma_id)
+static int iser_route_handler(struct rdma_cm_id *cma_id)
{
struct rdma_conn_param conn_param;
int ret;
@@ -437,9 +443,9 @@ static void iser_route_handler(struct rdma_cm_id *cma_id)
goto failure;
}
- return;
+ return 0;
failure:
- iser_connect_error(cma_id);
+ return iser_connect_error(cma_id);
}
static void iser_connected_handler(struct rdma_cm_id *cma_id)
@@ -451,12 +457,12 @@ static void iser_connected_handler(struct rdma_cm_id *cma_id)
wake_up_interruptible(&ib_conn->wait);
}
-static void iser_disconnected_handler(struct rdma_cm_id *cma_id)
+static int iser_disconnected_handler(struct rdma_cm_id *cma_id)
{
struct iser_conn *ib_conn;
+ int ret;
ib_conn = (struct iser_conn *)cma_id->context;
- ib_conn->disc_evt_flag = 1;
/* getting here when the state is UP means that the conn is being *
* terminated asynchronously from the iSCSI layer's perspective. */
@@ -471,20 +477,24 @@ static void iser_disconnected_handler(struct rdma_cm_id *cma_id)
ib_conn->state = ISER_CONN_DOWN;
wake_up_interruptible(&ib_conn->wait);
}
+
+ ret = iser_conn_put(ib_conn, 0); /* deref ib conn's cma id */
+ return ret;
}
static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
{
int ret = 0;
- iser_err("event %d conn %p id %p\n",event->event,cma_id->context,cma_id);
+ iser_err("event %d status %d conn %p id %p\n",
+ event->event, event->status, cma_id->context, cma_id);
switch (event->event) {
case RDMA_CM_EVENT_ADDR_RESOLVED:
- iser_addr_handler(cma_id);
+ ret = iser_addr_handler(cma_id);
break;
case RDMA_CM_EVENT_ROUTE_RESOLVED:
- iser_route_handler(cma_id);
+ ret = iser_route_handler(cma_id);
break;
case RDMA_CM_EVENT_ESTABLISHED:
iser_connected_handler(cma_id);
@@ -494,13 +504,12 @@ static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *eve
case RDMA_CM_EVENT_CONNECT_ERROR:
case RDMA_CM_EVENT_UNREACHABLE:
case RDMA_CM_EVENT_REJECTED:
- iser_err("event: %d, error: %d\n", event->event, event->status);
- iser_connect_error(cma_id);
+ ret = iser_connect_error(cma_id);
break;
case RDMA_CM_EVENT_DISCONNECTED:
case RDMA_CM_EVENT_DEVICE_REMOVAL:
case RDMA_CM_EVENT_ADDR_CHANGE:
- iser_disconnected_handler(cma_id);
+ ret = iser_disconnected_handler(cma_id);
break;
default:
iser_err("Unexpected RDMA CM event (%d)\n", event->event);
@@ -515,7 +524,7 @@ void iser_conn_init(struct iser_conn *ib_conn)
init_waitqueue_head(&ib_conn->wait);
ib_conn->post_recv_buf_count = 0;
atomic_set(&ib_conn->post_send_buf_count, 0);
- atomic_set(&ib_conn->refcount, 1);
+ atomic_set(&ib_conn->refcount, 1); /* ref ib conn allocation */
INIT_LIST_HEAD(&ib_conn->conn_list);
spin_lock_init(&ib_conn->lock);
}
@@ -543,6 +552,7 @@ int iser_connect(struct iser_conn *ib_conn,
ib_conn->state = ISER_CONN_PENDING;
+ iser_conn_get(ib_conn); /* ref ib conn's cma id */
ib_conn->cma_id = rdma_create_id(iser_cma_handler,
(void *)ib_conn,
RDMA_PS_TCP);
@@ -580,7 +590,7 @@ id_failure:
addr_failure:
ib_conn->state = ISER_CONN_DOWN;
connect_failure:
- iser_conn_release(ib_conn);
+ iser_conn_release(ib_conn, 1);
return err;
}
@@ -749,12 +759,10 @@ static void iser_handle_comp_error(struct iser_tx_desc *desc,
iscsi_conn_failure(ib_conn->iser_conn->iscsi_conn,
ISCSI_ERR_CONN_FAILED);
- /* complete the termination process if disconnect event was delivered *
- * note there are no more non completed posts to the QP */
- if (ib_conn->disc_evt_flag) {
- ib_conn->state = ISER_CONN_DOWN;
- wake_up_interruptible(&ib_conn->wait);
- }
+ /* no more non completed posts to the QP, complete the
+ * termination process w.o worrying on disconnect event */
+ ib_conn->state = ISER_CONN_DOWN;
+ wake_up_interruptible(&ib_conn->wait);
}
}
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