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path: root/drivers/infiniband/core/cm.c
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Diffstat (limited to 'drivers/infiniband/core/cm.c')
-rw-r--r--drivers/infiniband/core/cm.c126
1 files changed, 110 insertions, 16 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index c99525512..71c7c4c32 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -80,6 +80,8 @@ static struct ib_cm {
__be32 random_id_operand;
struct list_head timewait_list;
struct workqueue_struct *wq;
+ /* Sync on cm change port state */
+ spinlock_t state_lock;
} cm;
/* Counter indexes ordered by attribute ID */
@@ -161,6 +163,8 @@ struct cm_port {
struct ib_mad_agent *mad_agent;
struct kobject port_obj;
u8 port_num;
+ struct list_head cm_priv_prim_list;
+ struct list_head cm_priv_altr_list;
struct cm_counter_group counter_group[CM_COUNTER_GROUPS];
};
@@ -241,6 +245,12 @@ struct cm_id_private {
u8 service_timeout;
u8 target_ack_delay;
+ struct list_head prim_list;
+ struct list_head altr_list;
+ /* Indicates that the send port mad is registered and av is set */
+ int prim_send_port_not_ready;
+ int altr_send_port_not_ready;
+
struct list_head work_list;
atomic_t work_count;
};
@@ -259,20 +269,47 @@ static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
struct ib_mad_agent *mad_agent;
struct ib_mad_send_buf *m;
struct ib_ah *ah;
+ struct cm_av *av;
+ unsigned long flags, flags2;
+ int ret = 0;
+ /* don't let the port to be released till the agent is down */
+ spin_lock_irqsave(&cm.state_lock, flags2);
+ spin_lock_irqsave(&cm.lock, flags);
+ if (!cm_id_priv->prim_send_port_not_ready)
+ av = &cm_id_priv->av;
+ else if (!cm_id_priv->altr_send_port_not_ready &&
+ (cm_id_priv->alt_av.port))
+ av = &cm_id_priv->alt_av;
+ else {
+ pr_info("%s: not valid CM id\n", __func__);
+ ret = -ENODEV;
+ spin_unlock_irqrestore(&cm.lock, flags);
+ goto out;
+ }
+ spin_unlock_irqrestore(&cm.lock, flags);
+ /* Make sure the port haven't released the mad yet */
mad_agent = cm_id_priv->av.port->mad_agent;
- ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
- if (IS_ERR(ah))
- return PTR_ERR(ah);
+ if (!mad_agent) {
+ pr_info("%s: not a valid MAD agent\n", __func__);
+ ret = -ENODEV;
+ goto out;
+ }
+ ah = ib_create_ah(mad_agent->qp->pd, &av->ah_attr);
+ if (IS_ERR(ah)) {
+ ret = PTR_ERR(ah);
+ goto out;
+ }
m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
- cm_id_priv->av.pkey_index,
+ av->pkey_index,
0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
GFP_ATOMIC,
IB_MGMT_BASE_VERSION);
if (IS_ERR(m)) {
ib_destroy_ah(ah);
- return PTR_ERR(m);
+ ret = PTR_ERR(m);
+ goto out;
}
/* Timeout set by caller if response is expected. */
@@ -282,7 +319,10 @@ static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
atomic_inc(&cm_id_priv->refcount);
m->context[0] = cm_id_priv;
*msg = m;
- return 0;
+
+out:
+ spin_unlock_irqrestore(&cm.state_lock, flags2);
+ return ret;
}
static int cm_alloc_response_msg(struct cm_port *port,
@@ -352,7 +392,8 @@ static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
grh, &av->ah_attr);
}
-static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
+static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av,
+ struct cm_id_private *cm_id_priv)
{
struct cm_device *cm_dev;
struct cm_port *port = NULL;
@@ -387,7 +428,17 @@ static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
&av->ah_attr);
av->timeout = path->packet_life_time + 1;
- return 0;
+ spin_lock_irqsave(&cm.lock, flags);
+ if (&cm_id_priv->av == av)
+ list_add_tail(&cm_id_priv->prim_list, &port->cm_priv_prim_list);
+ else if (&cm_id_priv->alt_av == av)
+ list_add_tail(&cm_id_priv->altr_list, &port->cm_priv_altr_list);
+ else
+ ret = -EINVAL;
+
+ spin_unlock_irqrestore(&cm.lock, flags);
+
+ return ret;
}
static int cm_alloc_id(struct cm_id_private *cm_id_priv)
@@ -677,6 +728,8 @@ struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
spin_lock_init(&cm_id_priv->lock);
init_completion(&cm_id_priv->comp);
INIT_LIST_HEAD(&cm_id_priv->work_list);
+ INIT_LIST_HEAD(&cm_id_priv->prim_list);
+ INIT_LIST_HEAD(&cm_id_priv->altr_list);
atomic_set(&cm_id_priv->work_count, -1);
atomic_set(&cm_id_priv->refcount, 1);
return &cm_id_priv->id;
@@ -892,6 +945,15 @@ retest:
break;
}
+ spin_lock_irq(&cm.lock);
+ if (!list_empty(&cm_id_priv->altr_list) &&
+ (!cm_id_priv->altr_send_port_not_ready))
+ list_del(&cm_id_priv->altr_list);
+ if (!list_empty(&cm_id_priv->prim_list) &&
+ (!cm_id_priv->prim_send_port_not_ready))
+ list_del(&cm_id_priv->prim_list);
+ spin_unlock_irq(&cm.lock);
+
cm_free_id(cm_id->local_id);
cm_deref_id(cm_id_priv);
wait_for_completion(&cm_id_priv->comp);
@@ -1192,12 +1254,13 @@ int ib_send_cm_req(struct ib_cm_id *cm_id,
goto out;
}
- ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
+ ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av,
+ cm_id_priv);
if (ret)
goto error1;
if (param->alternate_path) {
ret = cm_init_av_by_path(param->alternate_path,
- &cm_id_priv->alt_av);
+ &cm_id_priv->alt_av, cm_id_priv);
if (ret)
goto error1;
}
@@ -1653,7 +1716,8 @@ static int cm_req_handler(struct cm_work *work)
dev_put(gid_attr.ndev);
}
work->path[0].gid_type = gid_attr.gid_type;
- ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
+ ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av,
+ cm_id_priv);
}
if (ret) {
int err = ib_get_cached_gid(work->port->cm_dev->ib_device,
@@ -1672,7 +1736,8 @@ static int cm_req_handler(struct cm_work *work)
goto rejected;
}
if (req_msg->alt_local_lid) {
- ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
+ ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av,
+ cm_id_priv);
if (ret) {
ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
&work->path[0].sgid,
@@ -2727,7 +2792,8 @@ int ib_send_cm_lap(struct ib_cm_id *cm_id,
goto out;
}
- ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av);
+ ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av,
+ cm_id_priv);
if (ret)
goto out;
cm_id_priv->alt_av.timeout =
@@ -2839,7 +2905,8 @@ static int cm_lap_handler(struct cm_work *work)
cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
work->mad_recv_wc->recv_buf.grh,
&cm_id_priv->av);
- cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
+ cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av,
+ cm_id_priv);
ret = atomic_inc_and_test(&cm_id_priv->work_count);
if (!ret)
list_add_tail(&work->list, &cm_id_priv->work_list);
@@ -3031,7 +3098,7 @@ int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
return -EINVAL;
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
- ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
+ ret = cm_init_av_by_path(param->path, &cm_id_priv->av, cm_id_priv);
if (ret)
goto out;
@@ -3468,7 +3535,9 @@ out:
static int cm_migrate(struct ib_cm_id *cm_id)
{
struct cm_id_private *cm_id_priv;
+ struct cm_av tmp_av;
unsigned long flags;
+ int tmp_send_port_not_ready;
int ret = 0;
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
@@ -3477,7 +3546,14 @@ static int cm_migrate(struct ib_cm_id *cm_id)
(cm_id->lap_state == IB_CM_LAP_UNINIT ||
cm_id->lap_state == IB_CM_LAP_IDLE)) {
cm_id->lap_state = IB_CM_LAP_IDLE;
+ /* Swap address vector */
+ tmp_av = cm_id_priv->av;
cm_id_priv->av = cm_id_priv->alt_av;
+ cm_id_priv->alt_av = tmp_av;
+ /* Swap port send ready state */
+ tmp_send_port_not_ready = cm_id_priv->prim_send_port_not_ready;
+ cm_id_priv->prim_send_port_not_ready = cm_id_priv->altr_send_port_not_ready;
+ cm_id_priv->altr_send_port_not_ready = tmp_send_port_not_ready;
} else
ret = -EINVAL;
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
@@ -3888,6 +3964,9 @@ static void cm_add_one(struct ib_device *ib_device)
port->cm_dev = cm_dev;
port->port_num = i;
+ INIT_LIST_HEAD(&port->cm_priv_prim_list);
+ INIT_LIST_HEAD(&port->cm_priv_altr_list);
+
ret = cm_create_port_fs(port);
if (ret)
goto error1;
@@ -3945,6 +4024,8 @@ static void cm_remove_one(struct ib_device *ib_device, void *client_data)
{
struct cm_device *cm_dev = client_data;
struct cm_port *port;
+ struct cm_id_private *cm_id_priv;
+ struct ib_mad_agent *cur_mad_agent;
struct ib_port_modify port_modify = {
.clr_port_cap_mask = IB_PORT_CM_SUP
};
@@ -3968,15 +4049,27 @@ static void cm_remove_one(struct ib_device *ib_device, void *client_data)
port = cm_dev->port[i-1];
ib_modify_port(ib_device, port->port_num, 0, &port_modify);
+ /* Mark all the cm_id's as not valid */
+ spin_lock_irq(&cm.lock);
+ list_for_each_entry(cm_id_priv, &port->cm_priv_altr_list, altr_list)
+ cm_id_priv->altr_send_port_not_ready = 1;
+ list_for_each_entry(cm_id_priv, &port->cm_priv_prim_list, prim_list)
+ cm_id_priv->prim_send_port_not_ready = 1;
+ spin_unlock_irq(&cm.lock);
/*
* We flush the queue here after the going_down set, this
* verify that no new works will be queued in the recv handler,
* after that we can call the unregister_mad_agent
*/
flush_workqueue(cm.wq);
- ib_unregister_mad_agent(port->mad_agent);
+ spin_lock_irq(&cm.state_lock);
+ cur_mad_agent = port->mad_agent;
+ port->mad_agent = NULL;
+ spin_unlock_irq(&cm.state_lock);
+ ib_unregister_mad_agent(cur_mad_agent);
cm_remove_port_fs(port);
}
+
device_unregister(cm_dev->device);
kfree(cm_dev);
}
@@ -3989,6 +4082,7 @@ static int __init ib_cm_init(void)
INIT_LIST_HEAD(&cm.device_list);
rwlock_init(&cm.device_lock);
spin_lock_init(&cm.lock);
+ spin_lock_init(&cm.state_lock);
cm.listen_service_table = RB_ROOT;
cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
cm.remote_id_table = RB_ROOT;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 03:20:47 +0000