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-rw-r--r--net/smc/smc_clc.c5
-rw-r--r--net/smc/smc_core.c26
-rw-r--r--net/smc/smc_core.h8
-rw-r--r--net/smc/smc_ib.c63
-rw-r--r--net/smc/smc_ib.h1
-rw-r--r--net/smc/smc_llc.c2
-rw-r--r--net/smc/smc_tx.c2
7 files changed, 59 insertions, 48 deletions
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index 86cccc24e52e..ea0068f0173c 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -349,7 +349,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
smc->peer_diagnosis = ntohl(dclc->peer_diagnosis);
if (((struct smc_clc_msg_decline *)buf)->hdr.flag) {
smc->conn.lgr->sync_err = 1;
- smc_lgr_terminate(smc->conn.lgr, true);
+ smc_lgr_terminate_sched(smc->conn.lgr);
}
}
@@ -372,7 +372,8 @@ int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info)
dclc.hdr.length = htons(sizeof(struct smc_clc_msg_decline));
dclc.hdr.version = SMC_CLC_V1;
dclc.hdr.flag = (peer_diag_info == SMC_CLC_DECL_SYNCERR) ? 1 : 0;
- if (smc->conn.lgr && !smc->conn.lgr->is_smcd)
+ if ((!smc->conn.lgr || !smc->conn.lgr->is_smcd) &&
+ smc_ib_is_valid_local_systemid())
memcpy(dclc.id_for_peer, local_systemid,
sizeof(local_systemid));
dclc.peer_diagnosis = htonl(peer_diag_info);
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index 5b085efa3bce..824c5211b027 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -46,6 +46,7 @@ static DECLARE_WAIT_QUEUE_HEAD(lgrs_deleted);
static void smc_buf_free(struct smc_link_group *lgr, bool is_rmb,
struct smc_buf_desc *buf_desc);
+static void __smc_lgr_terminate(struct smc_link_group *lgr, bool soft);
/* return head of link group list and its lock for a given link group */
static inline struct list_head *smc_lgr_list_head(struct smc_link_group *lgr,
@@ -241,7 +242,7 @@ static void smc_lgr_terminate_work(struct work_struct *work)
struct smc_link_group *lgr = container_of(work, struct smc_link_group,
terminate_work);
- smc_lgr_terminate(lgr, true);
+ __smc_lgr_terminate(lgr, true);
}
/* create a new SMC link group */
@@ -588,15 +589,15 @@ static void smc_lgr_cleanup(struct smc_link_group *lgr)
} else {
struct smc_link *lnk = &lgr->lnk[SMC_SINGLE_LINK];
- wake_up(&lnk->wr_reg_wait);
- if (lnk->state != SMC_LNK_INACTIVE) {
- smc_link_send_delete(lnk, false);
+ if (lnk->state != SMC_LNK_INACTIVE)
smc_llc_link_inactive(lnk);
- }
}
}
-/* terminate link group */
+/* terminate link group
+ * @soft: true if link group shutdown can take its time
+ * false if immediate link group shutdown is required
+ */
static void __smc_lgr_terminate(struct smc_link_group *lgr, bool soft)
{
struct smc_connection *conn;
@@ -634,25 +635,20 @@ static void __smc_lgr_terminate(struct smc_link_group *lgr, bool soft)
smc_lgr_free(lgr);
}
-/* unlink and terminate link group
- * @soft: true if link group shutdown can take its time
- * false if immediate link group shutdown is required
- */
-void smc_lgr_terminate(struct smc_link_group *lgr, bool soft)
+/* unlink link group and schedule termination */
+void smc_lgr_terminate_sched(struct smc_link_group *lgr)
{
spinlock_t *lgr_lock;
smc_lgr_list_head(lgr, &lgr_lock);
spin_lock_bh(lgr_lock);
- if (lgr->terminating) {
+ if (list_empty(&lgr->list) || lgr->terminating || lgr->freeing) {
spin_unlock_bh(lgr_lock);
return; /* lgr already terminating */
}
- if (!soft)
- lgr->freeing = 1;
list_del_init(&lgr->list);
spin_unlock_bh(lgr_lock);
- __smc_lgr_terminate(lgr, soft);
+ schedule_work(&lgr->terminate_work);
}
/* Called when IB port is terminated */
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index 234ae25f0025..8041db20c753 100644
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -285,19 +285,13 @@ static inline struct smc_connection *smc_lgr_find_conn(
return res;
}
-static inline void smc_lgr_terminate_sched(struct smc_link_group *lgr)
-{
- if (!lgr->terminating && !lgr->freeing)
- schedule_work(&lgr->terminate_work);
-}
-
struct smc_sock;
struct smc_clc_msg_accept_confirm;
struct smc_clc_msg_local;
void smc_lgr_forget(struct smc_link_group *lgr);
void smc_lgr_cleanup_early(struct smc_connection *conn);
-void smc_lgr_terminate(struct smc_link_group *lgr, bool soft);
+void smc_lgr_terminate_sched(struct smc_link_group *lgr);
void smc_port_terminate(struct smc_ib_device *smcibdev, u8 ibport);
void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid,
unsigned short vlan);
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index 05b825b3cfa4..04b6fefb8bce 100644
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -37,11 +37,7 @@ struct smc_ib_devices smc_ib_devices = { /* smc-registered ib devices */
.list = LIST_HEAD_INIT(smc_ib_devices.list),
};
-#define SMC_LOCAL_SYSTEMID_RESET "%%%%%%%"
-
-u8 local_systemid[SMC_SYSTEMID_LEN] = SMC_LOCAL_SYSTEMID_RESET; /* unique system
- * identifier
- */
+u8 local_systemid[SMC_SYSTEMID_LEN]; /* unique system identifier */
static int smc_ib_modify_qp_init(struct smc_link *lnk)
{
@@ -168,6 +164,15 @@ static inline void smc_ib_define_local_systemid(struct smc_ib_device *smcibdev,
{
memcpy(&local_systemid[2], &smcibdev->mac[ibport - 1],
sizeof(smcibdev->mac[ibport - 1]));
+}
+
+bool smc_ib_is_valid_local_systemid(void)
+{
+ return !is_zero_ether_addr(&local_systemid[2]);
+}
+
+static void smc_ib_init_local_systemid(void)
+{
get_random_bytes(&local_systemid[0], 2);
}
@@ -224,8 +229,7 @@ static int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport)
rc = smc_ib_fill_mac(smcibdev, ibport);
if (rc)
goto out;
- if (!strncmp(local_systemid, SMC_LOCAL_SYSTEMID_RESET,
- sizeof(local_systemid)) &&
+ if (!smc_ib_is_valid_local_systemid() &&
smc_ib_port_active(smcibdev, ibport))
/* create unique system identifier */
smc_ib_define_local_systemid(smcibdev, ibport);
@@ -257,6 +261,7 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler,
struct ib_event *ibevent)
{
struct smc_ib_device *smcibdev;
+ bool schedule = false;
u8 port_idx;
smcibdev = container_of(handler, struct smc_ib_device, event_handler);
@@ -266,22 +271,35 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler,
/* terminate all ports on device */
for (port_idx = 0; port_idx < SMC_MAX_PORTS; port_idx++) {
set_bit(port_idx, &smcibdev->port_event_mask);
- set_bit(port_idx, smcibdev->ports_going_away);
+ if (!test_and_set_bit(port_idx,
+ smcibdev->ports_going_away))
+ schedule = true;
}
- schedule_work(&smcibdev->port_event_work);
+ if (schedule)
+ schedule_work(&smcibdev->port_event_work);
break;
- case IB_EVENT_PORT_ERR:
case IB_EVENT_PORT_ACTIVE:
- case IB_EVENT_GID_CHANGE:
port_idx = ibevent->element.port_num - 1;
- if (port_idx < SMC_MAX_PORTS) {
- set_bit(port_idx, &smcibdev->port_event_mask);
- if (ibevent->event == IB_EVENT_PORT_ERR)
- set_bit(port_idx, smcibdev->ports_going_away);
- else if (ibevent->event == IB_EVENT_PORT_ACTIVE)
- clear_bit(port_idx, smcibdev->ports_going_away);
+ if (port_idx >= SMC_MAX_PORTS)
+ break;
+ set_bit(port_idx, &smcibdev->port_event_mask);
+ if (test_and_clear_bit(port_idx, smcibdev->ports_going_away))
schedule_work(&smcibdev->port_event_work);
- }
+ break;
+ case IB_EVENT_PORT_ERR:
+ port_idx = ibevent->element.port_num - 1;
+ if (port_idx >= SMC_MAX_PORTS)
+ break;
+ set_bit(port_idx, &smcibdev->port_event_mask);
+ if (!test_and_set_bit(port_idx, smcibdev->ports_going_away))
+ schedule_work(&smcibdev->port_event_work);
+ break;
+ case IB_EVENT_GID_CHANGE:
+ port_idx = ibevent->element.port_num - 1;
+ if (port_idx >= SMC_MAX_PORTS)
+ break;
+ set_bit(port_idx, &smcibdev->port_event_mask);
+ schedule_work(&smcibdev->port_event_work);
break;
default:
break;
@@ -316,11 +334,11 @@ static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv)
case IB_EVENT_QP_FATAL:
case IB_EVENT_QP_ACCESS_ERR:
port_idx = ibevent->element.qp->port - 1;
- if (port_idx < SMC_MAX_PORTS) {
- set_bit(port_idx, &smcibdev->port_event_mask);
- set_bit(port_idx, smcibdev->ports_going_away);
+ if (port_idx >= SMC_MAX_PORTS)
+ break;
+ set_bit(port_idx, &smcibdev->port_event_mask);
+ if (!test_and_set_bit(port_idx, smcibdev->ports_going_away))
schedule_work(&smcibdev->port_event_work);
- }
break;
default:
break;
@@ -594,6 +612,7 @@ static struct ib_client smc_ib_client = {
int __init smc_ib_register_client(void)
{
+ smc_ib_init_local_systemid();
return ib_register_client(&smc_ib_client);
}
diff --git a/net/smc/smc_ib.h b/net/smc/smc_ib.h
index 255db87547d3..5c2b115d36da 100644
--- a/net/smc/smc_ib.h
+++ b/net/smc/smc_ib.h
@@ -84,4 +84,5 @@ void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev,
enum dma_data_direction data_direction);
int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
unsigned short vlan_id, u8 gid[], u8 *sgid_index);
+bool smc_ib_is_valid_local_systemid(void);
#endif
diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c
index a9f6431dd69a..0e52aab53d97 100644
--- a/net/smc/smc_llc.c
+++ b/net/smc/smc_llc.c
@@ -614,7 +614,7 @@ static void smc_llc_testlink_work(struct work_struct *work)
rc = wait_for_completion_interruptible_timeout(&link->llc_testlink_resp,
SMC_LLC_WAIT_TIME);
if (rc <= 0) {
- smc_lgr_terminate(smc_get_lgr(link), true);
+ smc_lgr_terminate_sched(smc_get_lgr(link));
return;
}
next_interval = link->llc_testlink_time;
diff --git a/net/smc/smc_tx.c b/net/smc/smc_tx.c
index 0d42e7716b91..9f1ade86d70e 100644
--- a/net/smc/smc_tx.c
+++ b/net/smc/smc_tx.c
@@ -284,7 +284,7 @@ static int smc_tx_rdma_write(struct smc_connection *conn, int peer_rmbe_offset,
rdma_wr->rkey = lgr->rtokens[conn->rtoken_idx][SMC_SINGLE_LINK].rkey;
rc = ib_post_send(link->roce_qp, &rdma_wr->wr, NULL);
if (rc)
- smc_lgr_terminate(lgr, true);
+ smc_lgr_terminate_sched(lgr);
return rc;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-12 18:21:54 +0000