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-rw-r--r--net/smc/af_smc.c12
-rw-r--r--net/smc/smc_cdc.c6
-rw-r--r--net/smc/smc_clc.c45
-rw-r--r--net/smc/smc_clc.h2
-rw-r--r--net/smc/smc_core.c136
-rw-r--r--net/smc/smc_core.h9
-rw-r--r--net/smc/smc_ib.c27
-rw-r--r--net/smc/smc_ib.h4
-rw-r--r--net/smc/smc_ism.c11
-rw-r--r--net/smc/smc_ism.h3
-rw-r--r--net/smc/smc_llc.c212
-rw-r--r--net/smc/smc_llc.h2
-rw-r--r--net/smc/smc_pnet.c37
-rw-r--r--net/smc/smc_wr.c10
14 files changed, 290 insertions, 226 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 903321543838..1163d51196da 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -126,8 +126,10 @@ EXPORT_SYMBOL_GPL(smc_proto6);
static void smc_restore_fallback_changes(struct smc_sock *smc)
{
- smc->clcsock->file->private_data = smc->sk.sk_socket;
- smc->clcsock->file = NULL;
+ if (smc->clcsock->file) { /* non-accepted sockets have no file yet */
+ smc->clcsock->file->private_data = smc->sk.sk_socket;
+ smc->clcsock->file = NULL;
+ }
}
static int __smc_release(struct smc_sock *smc)
@@ -352,7 +354,7 @@ static int smcr_lgr_reg_rmbs(struct smc_link *link,
*/
mutex_lock(&lgr->llc_conf_mutex);
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
- if (lgr->lnk[i].state != SMC_LNK_ACTIVE)
+ if (!smc_link_active(&lgr->lnk[i]))
continue;
rc = smcr_link_reg_rmb(&lgr->lnk[i], rmb_desc);
if (rc)
@@ -632,7 +634,9 @@ static int smc_connect_rdma(struct smc_sock *smc,
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
struct smc_link *l = &smc->conn.lgr->lnk[i];
- if (l->peer_qpn == ntoh24(aclc->qpn)) {
+ if (l->peer_qpn == ntoh24(aclc->qpn) &&
+ !memcmp(l->peer_gid, &aclc->lcl.gid, SMC_GID_SIZE) &&
+ !memcmp(l->peer_mac, &aclc->lcl.mac, sizeof(l->peer_mac))) {
link = l;
break;
}
diff --git a/net/smc/smc_cdc.c b/net/smc/smc_cdc.c
index a47e8855e045..ce468ff62a19 100644
--- a/net/smc/smc_cdc.c
+++ b/net/smc/smc_cdc.c
@@ -66,9 +66,13 @@ int smc_cdc_get_free_slot(struct smc_connection *conn,
rc = smc_wr_tx_get_free_slot(link, smc_cdc_tx_handler, wr_buf,
wr_rdma_buf,
(struct smc_wr_tx_pend_priv **)pend);
- if (conn->killed)
+ if (conn->killed) {
/* abnormal termination */
+ if (!rc)
+ smc_wr_tx_put_slot(link,
+ (struct smc_wr_tx_pend_priv *)pend);
rc = -EPIPE;
+ }
return rc;
}
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index d5627df24215..779f4142a11d 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -27,6 +27,7 @@
#define SMCR_CLC_ACCEPT_CONFIRM_LEN 68
#define SMCD_CLC_ACCEPT_CONFIRM_LEN 48
+#define SMC_CLC_RECV_BUF_LEN 100
/* eye catcher "SMCR" EBCDIC for CLC messages */
static const char SMC_EYECATCHER[4] = {'\xe2', '\xd4', '\xc3', '\xd9'};
@@ -36,7 +37,7 @@ static const char SMCD_EYECATCHER[4] = {'\xe2', '\xd4', '\xc3', '\xc4'};
/* check if received message has a correct header length and contains valid
* heading and trailing eyecatchers
*/
-static bool smc_clc_msg_hdr_valid(struct smc_clc_msg_hdr *clcm)
+static bool smc_clc_msg_hdr_valid(struct smc_clc_msg_hdr *clcm, bool check_trl)
{
struct smc_clc_msg_proposal_prefix *pclc_prfx;
struct smc_clc_msg_accept_confirm *clc;
@@ -49,12 +50,9 @@ static bool smc_clc_msg_hdr_valid(struct smc_clc_msg_hdr *clcm)
return false;
switch (clcm->type) {
case SMC_CLC_PROPOSAL:
- if (clcm->path != SMC_TYPE_R && clcm->path != SMC_TYPE_D &&
- clcm->path != SMC_TYPE_B)
- return false;
pclc = (struct smc_clc_msg_proposal *)clcm;
pclc_prfx = smc_clc_proposal_get_prefix(pclc);
- if (ntohs(pclc->hdr.length) !=
+ if (ntohs(pclc->hdr.length) <
sizeof(*pclc) + ntohs(pclc->iparea_offset) +
sizeof(*pclc_prfx) +
pclc_prfx->ipv6_prefixes_cnt *
@@ -86,7 +84,8 @@ static bool smc_clc_msg_hdr_valid(struct smc_clc_msg_hdr *clcm)
default:
return false;
}
- if (memcmp(trl->eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER)) &&
+ if (check_trl &&
+ memcmp(trl->eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER)) &&
memcmp(trl->eyecatcher, SMCD_EYECATCHER, sizeof(SMCD_EYECATCHER)))
return false;
return true;
@@ -276,7 +275,8 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
struct msghdr msg = {NULL, 0};
int reason_code = 0;
struct kvec vec = {buf, buflen};
- int len, datlen;
+ int len, datlen, recvlen;
+ bool check_trl = true;
int krflags;
/* peek the first few bytes to determine length of data to receive
@@ -320,10 +320,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
}
datlen = ntohs(clcm->length);
if ((len < sizeof(struct smc_clc_msg_hdr)) ||
- (datlen > buflen) ||
- (clcm->version != SMC_CLC_V1) ||
- (clcm->path != SMC_TYPE_R && clcm->path != SMC_TYPE_D &&
- clcm->path != SMC_TYPE_B) ||
+ (clcm->version < SMC_CLC_V1) ||
((clcm->type != SMC_CLC_DECLINE) &&
(clcm->type != expected_type))) {
smc->sk.sk_err = EPROTO;
@@ -331,16 +328,38 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
goto out;
}
+ if (clcm->type == SMC_CLC_PROPOSAL && clcm->path == SMC_TYPE_N)
+ reason_code = SMC_CLC_DECL_VERSMISMAT; /* just V2 offered */
+
/* receive the complete CLC message */
memset(&msg, 0, sizeof(struct msghdr));
- iov_iter_kvec(&msg.msg_iter, READ, &vec, 1, datlen);
+ if (datlen > buflen) {
+ check_trl = false;
+ recvlen = buflen;
+ } else {
+ recvlen = datlen;
+ }
+ iov_iter_kvec(&msg.msg_iter, READ, &vec, 1, recvlen);
krflags = MSG_WAITALL;
len = sock_recvmsg(smc->clcsock, &msg, krflags);
- if (len < datlen || !smc_clc_msg_hdr_valid(clcm)) {
+ if (len < recvlen || !smc_clc_msg_hdr_valid(clcm, check_trl)) {
smc->sk.sk_err = EPROTO;
reason_code = -EPROTO;
goto out;
}
+ datlen -= len;
+ while (datlen) {
+ u8 tmp[SMC_CLC_RECV_BUF_LEN];
+
+ vec.iov_base = &tmp;
+ vec.iov_len = SMC_CLC_RECV_BUF_LEN;
+ /* receive remaining proposal message */
+ recvlen = datlen > SMC_CLC_RECV_BUF_LEN ?
+ SMC_CLC_RECV_BUF_LEN : datlen;
+ iov_iter_kvec(&msg.msg_iter, READ, &vec, 1, recvlen);
+ len = sock_recvmsg(smc->clcsock, &msg, krflags);
+ datlen -= len;
+ }
if (clcm->type == SMC_CLC_DECLINE) {
struct smc_clc_msg_decline *dclc;
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
index 465876701b75..76c2b150d040 100644
--- a/net/smc/smc_clc.h
+++ b/net/smc/smc_clc.h
@@ -25,6 +25,7 @@
#define SMC_CLC_V1 0x1 /* SMC version */
#define SMC_TYPE_R 0 /* SMC-R only */
#define SMC_TYPE_D 1 /* SMC-D only */
+#define SMC_TYPE_N 2 /* neither SMC-R nor SMC-D */
#define SMC_TYPE_B 3 /* SMC-R and SMC-D */
#define CLC_WAIT_TIME (6 * HZ) /* max. wait time on clcsock */
#define CLC_WAIT_TIME_SHORT HZ /* short wait time on clcsock */
@@ -46,6 +47,7 @@
#define SMC_CLC_DECL_ISMVLANERR 0x03090000 /* err to reg vlan id on ism dev */
#define SMC_CLC_DECL_NOACTLINK 0x030a0000 /* no active smc-r link in lgr */
#define SMC_CLC_DECL_NOSRVLINK 0x030b0000 /* SMC-R link from srv not found */
+#define SMC_CLC_DECL_VERSMISMAT 0x030c0000 /* SMC version mismatch */
#define SMC_CLC_DECL_SYNCERR 0x04000000 /* synchronization error */
#define SMC_CLC_DECL_PEERDECL 0x05000000 /* peer declined during handshake */
#define SMC_CLC_DECL_INTERR 0x09990000 /* internal error */
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index 7964a21e5e6f..f82a2e599917 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -15,6 +15,7 @@
#include <linux/workqueue.h>
#include <linux/wait.h>
#include <linux/reboot.h>
+#include <linux/mutex.h>
#include <net/tcp.h>
#include <net/sock.h>
#include <rdma/ib_verbs.h>
@@ -44,18 +45,10 @@ static struct smc_lgr_list smc_lgr_list = { /* established link groups */
static atomic_t lgr_cnt = ATOMIC_INIT(0); /* number of existing link groups */
static DECLARE_WAIT_QUEUE_HEAD(lgrs_deleted);
-struct smc_ib_up_work {
- struct work_struct work;
- struct smc_link_group *lgr;
- struct smc_ib_device *smcibdev;
- u8 ibport;
-};
-
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);
-static void smc_link_up_work(struct work_struct *work);
static void smc_link_down_work(struct work_struct *work);
/* return head of link group list and its lock for a given link group */
@@ -247,7 +240,8 @@ static void smcr_lgr_link_deactivate_all(struct smc_link_group *lgr)
if (smc_link_usable(lnk))
lnk->state = SMC_LNK_INACTIVE;
}
- wake_up_interruptible_all(&lgr->llc_waiter);
+ wake_up_all(&lgr->llc_msg_waiter);
+ wake_up_all(&lgr->llc_flow_waiter);
}
static void smc_lgr_free(struct smc_link_group *lgr);
@@ -324,7 +318,6 @@ int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
get_device(&ini->ib_dev->ibdev->dev);
atomic_inc(&ini->ib_dev->lnk_cnt);
- lnk->state = SMC_LNK_ACTIVATING;
lnk->link_id = smcr_next_link_id(lgr);
lnk->lgr = lgr;
lnk->link_idx = link_idx;
@@ -360,6 +353,7 @@ int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
rc = smc_wr_create_link(lnk);
if (rc)
goto destroy_qp;
+ lnk->state = SMC_LNK_ACTIVATING;
return 0;
destroy_qp:
@@ -450,7 +444,7 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
}
smc->conn.lgr = lgr;
spin_lock_bh(lgr_lock);
- list_add(&lgr->list, lgr_list);
+ list_add_tail(&lgr->list, lgr_list);
spin_unlock_bh(lgr_lock);
return 0;
@@ -548,8 +542,7 @@ struct smc_link *smc_switch_conns(struct smc_link_group *lgr,
smc_wr_wakeup_tx_wait(from_lnk);
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
- if (lgr->lnk[i].state != SMC_LNK_ACTIVE ||
- i == from_lnk->link_idx)
+ if (!smc_link_active(&lgr->lnk[i]) || i == from_lnk->link_idx)
continue;
if (is_dev_err && from_lnk->smcibdev == lgr->lnk[i].smcibdev &&
from_lnk->ibport == lgr->lnk[i].ibport) {
@@ -1104,66 +1097,23 @@ static void smc_conn_abort_work(struct work_struct *work)
sock_put(&smc->sk); /* sock_hold done by schedulers of abort_work */
}
-/* link is up - establish alternate link if applicable */
-static void smcr_link_up(struct smc_link_group *lgr,
- struct smc_ib_device *smcibdev, u8 ibport)
-{
- struct smc_link *link = NULL;
-
- if (list_empty(&lgr->list) ||
- lgr->type == SMC_LGR_SYMMETRIC ||
- lgr->type == SMC_LGR_ASYMMETRIC_PEER)
- return;
-
- if (lgr->role == SMC_SERV) {
- /* trigger local add link processing */
- link = smc_llc_usable_link(lgr);
- if (!link)
- return;
- smc_llc_srv_add_link_local(link);
- } else {
- /* invite server to start add link processing */
- u8 gid[SMC_GID_SIZE];
-
- if (smc_ib_determine_gid(smcibdev, ibport, lgr->vlan_id, gid,
- NULL))
- return;
- if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE) {
- /* some other llc task is ongoing */
- wait_event_interruptible_timeout(lgr->llc_waiter,
- (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_NONE),
- SMC_LLC_WAIT_TIME);
- }
- if (list_empty(&lgr->list) ||
- !smc_ib_port_active(smcibdev, ibport))
- return; /* lgr or device no longer active */
- link = smc_llc_usable_link(lgr);
- if (!link)
- return;
- smc_llc_send_add_link(link, smcibdev->mac[ibport - 1], gid,
- NULL, SMC_LLC_REQ);
- }
-}
-
void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport)
{
- struct smc_ib_up_work *ib_work;
struct smc_link_group *lgr, *n;
list_for_each_entry_safe(lgr, n, &smc_lgr_list.list, list) {
+ struct smc_link *link;
+
if (strncmp(smcibdev->pnetid[ibport - 1], lgr->pnet_id,
SMC_MAX_PNETID_LEN) ||
lgr->type == SMC_LGR_SYMMETRIC ||
lgr->type == SMC_LGR_ASYMMETRIC_PEER)
continue;
- ib_work = kmalloc(sizeof(*ib_work), GFP_KERNEL);
- if (!ib_work)
- continue;
- INIT_WORK(&ib_work->work, smc_link_up_work);
- ib_work->lgr = lgr;
- ib_work->smcibdev = smcibdev;
- ib_work->ibport = ibport;
- schedule_work(&ib_work->work);
+
+ /* trigger local add link processing */
+ link = smc_llc_usable_link(lgr);
+ if (link)
+ smc_llc_add_link_local(link);
}
}
@@ -1195,13 +1145,19 @@ static void smcr_link_down(struct smc_link *lnk)
if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE) {
/* another llc task is ongoing */
mutex_unlock(&lgr->llc_conf_mutex);
- wait_event_interruptible_timeout(lgr->llc_waiter,
- (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_NONE),
+ wait_event_timeout(lgr->llc_flow_waiter,
+ (list_empty(&lgr->list) ||
+ lgr->llc_flow_lcl.type == SMC_LLC_FLOW_NONE),
SMC_LLC_WAIT_TIME);
mutex_lock(&lgr->llc_conf_mutex);
}
- smc_llc_send_delete_link(to_lnk, del_link_id, SMC_LLC_REQ, true,
- SMC_LLC_DEL_LOST_PATH);
+ if (!list_empty(&lgr->list)) {
+ smc_llc_send_delete_link(to_lnk, del_link_id,
+ SMC_LLC_REQ, true,
+ SMC_LLC_DEL_LOST_PATH);
+ smcr_link_clear(lnk, true);
+ }
+ wake_up(&lgr->llc_flow_waiter); /* wake up next waiter */
}
}
@@ -1240,20 +1196,6 @@ void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport)
}
}
-static void smc_link_up_work(struct work_struct *work)
-{
- struct smc_ib_up_work *ib_work = container_of(work,
- struct smc_ib_up_work,
- work);
- struct smc_link_group *lgr = ib_work->lgr;
-
- if (list_empty(&lgr->list))
- goto out;
- smcr_link_up(lgr, ib_work->smcibdev, ib_work->ibport);
-out:
- kfree(ib_work);
-}
-
static void smc_link_down_work(struct work_struct *work)
{
struct smc_link *link = container_of(work, struct smc_link,
@@ -1262,7 +1204,7 @@ static void smc_link_down_work(struct work_struct *work)
if (list_empty(&lgr->list))
return;
- wake_up_interruptible_all(&lgr->llc_waiter);
+ wake_up_all(&lgr->llc_msg_waiter);
mutex_lock(&lgr->llc_conf_mutex);
smcr_link_down(link);
mutex_unlock(&lgr->llc_conf_mutex);
@@ -1326,7 +1268,7 @@ static bool smcr_lgr_match(struct smc_link_group *lgr,
return false;
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
- if (lgr->lnk[i].state != SMC_LNK_ACTIVE)
+ if (!smc_link_active(&lgr->lnk[i]))
continue;
if ((lgr->role == SMC_SERV || lgr->lnk[i].peer_qpn == clcqpn) &&
!memcmp(lgr->lnk[i].peer_gid, &lcl->gid, SMC_GID_SIZE) &&
@@ -1369,7 +1311,7 @@ int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini)
smcr_lgr_match(lgr, ini->ib_lcl, role, ini->ib_clcqpn)) &&
!lgr->sync_err &&
lgr->vlan_id == ini->vlan_id &&
- (role == SMC_CLNT ||
+ (role == SMC_CLNT || ini->is_smcd ||
lgr->conns_num < SMC_RMBS_PER_LGR_MAX)) {
/* link group found */
ini->cln_first_contact = SMC_REUSE_CONTACT;
@@ -1774,14 +1716,14 @@ static int __smc_buf_create(struct smc_sock *smc, bool is_smcd, bool is_rmb)
void smc_sndbuf_sync_sg_for_cpu(struct smc_connection *conn)
{
- if (!conn->lgr || conn->lgr->is_smcd || !smc_link_usable(conn->lnk))
+ if (!conn->lgr || conn->lgr->is_smcd || !smc_link_active(conn->lnk))
return;
smc_ib_sync_sg_for_cpu(conn->lnk, conn->sndbuf_desc, DMA_TO_DEVICE);
}
void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn)
{
- if (!conn->lgr || conn->lgr->is_smcd || !smc_link_usable(conn->lnk))
+ if (!conn->lgr || conn->lgr->is_smcd || !smc_link_active(conn->lnk))
return;
smc_ib_sync_sg_for_device(conn->lnk, conn->sndbuf_desc, DMA_TO_DEVICE);
}
@@ -1793,7 +1735,7 @@ void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn)
if (!conn->lgr || conn->lgr->is_smcd)
return;
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
- if (!smc_link_usable(&conn->lgr->lnk[i]))
+ if (!smc_link_active(&conn->lgr->lnk[i]))
continue;
smc_ib_sync_sg_for_cpu(&conn->lgr->lnk[i], conn->rmb_desc,
DMA_FROM_DEVICE);
@@ -1807,7 +1749,7 @@ void smc_rmb_sync_sg_for_device(struct smc_connection *conn)
if (!conn->lgr || conn->lgr->is_smcd)
return;
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
- if (!smc_link_usable(&conn->lgr->lnk[i]))
+ if (!smc_link_active(&conn->lgr->lnk[i]))
continue;
smc_ib_sync_sg_for_device(&conn->lgr->lnk[i], conn->rmb_desc,
DMA_FROM_DEVICE);
@@ -1830,8 +1772,12 @@ int smc_buf_create(struct smc_sock *smc, bool is_smcd)
return rc;
/* create rmb */
rc = __smc_buf_create(smc, is_smcd, true);
- if (rc)
+ if (rc) {
+ mutex_lock(&smc->conn.lgr->sndbufs_lock);
+ list_del(&smc->conn.sndbuf_desc->list);
+ mutex_unlock(&smc->conn.lgr->sndbufs_lock);
smc_buf_free(smc->conn.lgr, false, smc->conn.sndbuf_desc);
+ }
return rc;
}
@@ -1955,20 +1901,20 @@ static void smc_core_going_away(void)
struct smc_ib_device *smcibdev;
struct smcd_dev *smcd;
- spin_lock(&smc_ib_devices.lock);
+ mutex_lock(&smc_ib_devices.mutex);
list_for_each_entry(smcibdev, &smc_ib_devices.list, list) {
int i;
for (i = 0; i < SMC_MAX_PORTS; i++)
set_bit(i, smcibdev->ports_going_away);
}
- spin_unlock(&smc_ib_devices.lock);
+ mutex_unlock(&smc_ib_devices.mutex);
- spin_lock(&smcd_dev_list.lock);
+ mutex_lock(&smcd_dev_list.mutex);
list_for_each_entry(smcd, &smcd_dev_list.list, list) {
smcd->going_away = 1;
}
- spin_unlock(&smcd_dev_list.lock);
+ mutex_unlock(&smcd_dev_list.mutex);
}
/* Clean up all SMC link groups */
@@ -1980,10 +1926,10 @@ static void smc_lgrs_shutdown(void)
smc_smcr_terminate_all(NULL);
- spin_lock(&smcd_dev_list.lock);
+ mutex_lock(&smcd_dev_list.mutex);
list_for_each_entry(smcd, &smcd_dev_list.list, list)
smc_smcd_terminate_all(smcd);
- spin_unlock(&smcd_dev_list.lock);
+ mutex_unlock(&smcd_dev_list.mutex);
}
static int smc_core_reboot_event(struct notifier_block *this,
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index 86d160f0d187..1c4d5439d0ff 100644
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -262,8 +262,10 @@ struct smc_link_group {
struct work_struct llc_del_link_work;
struct work_struct llc_event_work;
/* llc event worker */
- wait_queue_head_t llc_waiter;
+ wait_queue_head_t llc_flow_waiter;
/* w4 next llc event */
+ wait_queue_head_t llc_msg_waiter;
+ /* w4 next llc msg */
struct smc_llc_flow llc_flow_lcl;
/* llc local control field */
struct smc_llc_flow llc_flow_rmt;
@@ -347,6 +349,11 @@ static inline bool smc_link_usable(struct smc_link *lnk)
return true;
}
+static inline bool smc_link_active(struct smc_link *lnk)
+{
+ return lnk->state == SMC_LNK_ACTIVE;
+}
+
struct smc_sock;
struct smc_clc_msg_accept_confirm;
struct smc_clc_msg_local;
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index 562a52d01ad1..1c314dbdc7fa 100644
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -16,6 +16,7 @@
#include <linux/workqueue.h>
#include <linux/scatterlist.h>
#include <linux/wait.h>
+#include <linux/mutex.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_cache.h>
@@ -33,7 +34,7 @@
#define SMC_QP_RNR_RETRY 7 /* 7: infinite */
struct smc_ib_devices smc_ib_devices = { /* smc-registered ib devices */
- .lock = __SPIN_LOCK_UNLOCKED(smc_ib_devices.lock),
+ .mutex = __MUTEX_INITIALIZER(smc_ib_devices.mutex),
.list = LIST_HEAD_INIT(smc_ib_devices.list),
};
@@ -505,6 +506,10 @@ long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev)
int cqe_size_order, smc_order;
long rc;
+ mutex_lock(&smcibdev->mutex);
+ rc = 0;
+ if (smcibdev->initialized)
+ goto out;
/* the calculated number of cq entries fits to mlx5 cq allocation */
cqe_size_order = cache_line_size() == 128 ? 7 : 6;
smc_order = MAX_ORDER - cqe_size_order - 1;
@@ -516,7 +521,7 @@ long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev)
rc = PTR_ERR_OR_ZERO(smcibdev->roce_cq_send);
if (IS_ERR(smcibdev->roce_cq_send)) {
smcibdev->roce_cq_send = NULL;
- return rc;
+ goto out;
}
smcibdev->roce_cq_recv = ib_create_cq(smcibdev->ibdev,
smc_wr_rx_cq_handler, NULL,
@@ -528,21 +533,26 @@ long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev)
}
smc_wr_add_dev(smcibdev);
smcibdev->initialized = 1;
- return rc;
+ goto out;
err:
ib_destroy_cq(smcibdev->roce_cq_send);
+out:
+ mutex_unlock(&smcibdev->mutex);
return rc;
}
static void smc_ib_cleanup_per_ibdev(struct smc_ib_device *smcibdev)
{
+ mutex_lock(&smcibdev->mutex);
if (!smcibdev->initialized)
- return;
+ goto out;
smcibdev->initialized = 0;
ib_destroy_cq(smcibdev->roce_cq_recv);
ib_destroy_cq(smcibdev->roce_cq_send);
smc_wr_remove_dev(smcibdev);
+out:
+ mutex_unlock(&smcibdev->mutex);
}
static struct ib_client smc_ib_client;
@@ -565,9 +575,10 @@ static int smc_ib_add_dev(struct ib_device *ibdev)
INIT_WORK(&smcibdev->port_event_work, smc_ib_port_event_work);
atomic_set(&smcibdev->lnk_cnt, 0);
init_waitqueue_head(&smcibdev->lnks_deleted);
- spin_lock(&smc_ib_devices.lock);
+ mutex_init(&smcibdev->mutex);
+ mutex_lock(&smc_ib_devices.mutex);
list_add_tail(&smcibdev->list, &smc_ib_devices.list);
- spin_unlock(&smc_ib_devices.lock);
+ mutex_unlock(&smc_ib_devices.mutex);
ib_set_client_data(ibdev, &smc_ib_client, smcibdev);
INIT_IB_EVENT_HANDLER(&smcibdev->event_handler, smcibdev->ibdev,
smc_ib_global_event_handler);
@@ -602,9 +613,9 @@ static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data)
{
struct smc_ib_device *smcibdev = client_data;
- spin_lock(&smc_ib_devices.lock);
+ mutex_lock(&smc_ib_devices.mutex);
list_del_init(&smcibdev->list); /* remove from smc_ib_devices */
- spin_unlock(&smc_ib_devices.lock);
+ mutex_unlock(&smc_ib_devices.mutex);
pr_warn_ratelimited("smc: removing ib device %s\n",
smcibdev->ibdev->name);
smc_smcr_terminate_all(smcibdev);
diff --git a/net/smc/smc_ib.h b/net/smc/smc_ib.h
index e6a696ae15f3..2ce481187dd0 100644
--- a/net/smc/smc_ib.h
+++ b/net/smc/smc_ib.h
@@ -14,6 +14,7 @@
#include <linux/interrupt.h>
#include <linux/if_ether.h>
+#include <linux/mutex.h>
#include <linux/wait.h>
#include <rdma/ib_verbs.h>
#include <net/smc.h>
@@ -25,7 +26,7 @@
struct smc_ib_devices { /* list of smc ib devices definition */
struct list_head list;
- spinlock_t lock; /* protects list of smc ib devices */
+ struct mutex mutex; /* protects list of smc ib devices */
};
extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */
@@ -51,6 +52,7 @@ struct smc_ib_device { /* ib-device infos for smc */
DECLARE_BITMAP(ports_going_away, SMC_MAX_PORTS);
atomic_t lnk_cnt; /* number of links on ibdev */
wait_queue_head_t lnks_deleted; /* wait 4 removal of all links*/
+ struct mutex mutex; /* protect dev setup+cleanup */
};
struct smc_buf_desc;
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index 91f85fc09fb8..998c525de785 100644
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -7,6 +7,7 @@
*/
#include <linux/spinlock.h>
+#include <linux/mutex.h>
#include <linux/slab.h>
#include <asm/page.h>
@@ -17,7 +18,7 @@
struct smcd_dev_list smcd_dev_list = {
.list = LIST_HEAD_INIT(smcd_dev_list.list),
- .lock = __SPIN_LOCK_UNLOCKED(smcd_dev_list.lock)
+ .mutex = __MUTEX_INITIALIZER(smcd_dev_list.mutex)
};
/* Test if an ISM communication is possible. */
@@ -317,9 +318,9 @@ EXPORT_SYMBOL_GPL(smcd_alloc_dev);
int smcd_register_dev(struct smcd_dev *smcd)
{
- spin_lock(&smcd_dev_list.lock);
+ mutex_lock(&smcd_dev_list.mutex);
list_add_tail(&smcd->list, &smcd_dev_list.list);
- spin_unlock(&smcd_dev_list.lock);
+ mutex_unlock(&smcd_dev_list.mutex);
pr_warn_ratelimited("smc: adding smcd device %s with pnetid %.16s%s\n",
dev_name(&smcd->dev), smcd->pnetid,
@@ -333,9 +334,9 @@ void smcd_unregister_dev(struct smcd_dev *smcd)
{
pr_warn_ratelimited("smc: removing smcd device %s\n",
dev_name(&smcd->dev));
- spin_lock(&smcd_dev_list.lock);
+ mutex_lock(&smcd_dev_list.mutex);
list_del_init(&smcd->list);
- spin_unlock(&smcd_dev_list.lock);
+ mutex_unlock(&smcd_dev_list.mutex);
smcd->going_away = 1;
smc_smcd_terminate_all(smcd);
flush_workqueue(smcd->event_wq);
diff --git a/net/smc/smc_ism.h b/net/smc/smc_ism.h
index 4da946cbfa29..81cc4537efd3 100644
--- a/net/smc/smc_ism.h
+++ b/net/smc/smc_ism.h
@@ -10,12 +10,13 @@
#define SMCD_ISM_H
#include <linux/uio.h>
+#include <linux/mutex.h>
#include "smc.h"
struct smcd_dev_list { /* List of SMCD devices */
struct list_head list;
- spinlock_t lock; /* Protects list of devices */
+ struct mutex mutex; /* Protects list of devices */
};
extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */
diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c
index 391237b601fe..df5b0a6ea848 100644
--- a/net/smc/smc_llc.c
+++ b/net/smc/smc_llc.c
@@ -186,6 +186,26 @@ static inline void smc_llc_flow_qentry_set(struct smc_llc_flow *flow,
flow->qentry = qentry;
}
+static void smc_llc_flow_parallel(struct smc_link_group *lgr, u8 flow_type,
+ struct smc_llc_qentry *qentry)
+{
+ u8 msg_type = qentry->msg.raw.hdr.common.type;
+
+ if ((msg_type == SMC_LLC_ADD_LINK || msg_type == SMC_LLC_DELETE_LINK) &&
+ flow_type != msg_type && !lgr->delayed_event) {
+ lgr->delayed_event = qentry;
+ return;
+ }
+ /* drop parallel or already-in-progress llc requests */
+ if (flow_type != msg_type)
+ pr_warn_once("smc: SMC-R lg %*phN dropped parallel "
+ "LLC msg: msg %d flow %d role %d\n",
+ SMC_LGR_ID_SIZE, &lgr->id,
+ qentry->msg.raw.hdr.common.type,
+ flow_type, lgr->role);
+ kfree(qentry);
+}
+
/* try to start a new llc flow, initiated by an incoming llc msg */
static bool smc_llc_flow_start(struct smc_llc_flow *flow,
struct smc_llc_qentry *qentry)
@@ -195,14 +215,7 @@ static bool smc_llc_flow_start(struct smc_llc_flow *flow,
spin_lock_bh(&lgr->llc_flow_lock);
if (flow->type) {
/* a flow is already active */
- if ((qentry->msg.raw.hdr.common.type == SMC_LLC_ADD_LINK ||
- qentry->msg.raw.hdr.common.type == SMC_LLC_DELETE_LINK) &&
- !lgr->delayed_event) {
- lgr->delayed_event = qentry;
- } else {
- /* forget this llc request */
- kfree(qentry);
- }
+ smc_llc_flow_parallel(lgr, flow->type, qentry);
spin_unlock_bh(&lgr->llc_flow_lock);
return false;
}
@@ -222,8 +235,8 @@ static bool smc_llc_flow_start(struct smc_llc_flow *flow,
}
if (qentry == lgr->delayed_event)
lgr->delayed_event = NULL;
- spin_unlock_bh(&lgr->llc_flow_lock);
smc_llc_flow_qentry_set(flow, qentry);
+ spin_unlock_bh(&lgr->llc_flow_lock);
return true;
}
@@ -251,11 +264,11 @@ again:
return 0;
}
spin_unlock_bh(&lgr->llc_flow_lock);
- rc = wait_event_interruptible_timeout(lgr->llc_waiter,
- (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_NONE &&
- (lgr->llc_flow_rmt.type == SMC_LLC_FLOW_NONE ||
- lgr->llc_flow_rmt.type == allowed_remote)),
- SMC_LLC_WAIT_TIME);
+ rc = wait_event_timeout(lgr->llc_flow_waiter, (list_empty(&lgr->list) ||
+ (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_NONE &&
+ (lgr->llc_flow_rmt.type == SMC_LLC_FLOW_NONE ||
+ lgr->llc_flow_rmt.type == allowed_remote))),
+ SMC_LLC_WAIT_TIME * 10);
if (!rc)
return -ETIMEDOUT;
goto again;
@@ -272,7 +285,7 @@ void smc_llc_flow_stop(struct smc_link_group *lgr, struct smc_llc_flow *flow)
flow == &lgr->llc_flow_lcl)
schedule_work(&lgr->llc_event_work);
else
- wake_up_interruptible(&lgr->llc_waiter);
+ wake_up(&lgr->llc_flow_waiter);
}
/* lnk is optional and used for early wakeup when link goes down, useful in
@@ -283,26 +296,32 @@ struct smc_llc_qentry *smc_llc_wait(struct smc_link_group *lgr,
int time_out, u8 exp_msg)
{
struct smc_llc_flow *flow = &lgr->llc_flow_lcl;
+ u8 rcv_msg;
- wait_event_interruptible_timeout(lgr->llc_waiter,
- (flow->qentry ||
- (lnk && !smc_link_usable(lnk)) ||
- list_empty(&lgr->list)),
- time_out);
+ wait_event_timeout(lgr->llc_msg_waiter,
+ (flow->qentry ||
+ (lnk && !smc_link_usable(lnk)) ||
+ list_empty(&lgr->list)),
+ time_out);
if (!flow->qentry ||
(lnk && !smc_link_usable(lnk)) || list_empty(&lgr->list)) {
smc_llc_flow_qentry_del(flow);
goto out;
}
- if (exp_msg && flow->qentry->msg.raw.hdr.common.type != exp_msg) {
+ rcv_msg = flow->qentry->msg.raw.hdr.common.type;
+ if (exp_msg && rcv_msg != exp_msg) {
if (exp_msg == SMC_LLC_ADD_LINK &&
- flow->qentry->msg.raw.hdr.common.type ==
- SMC_LLC_DELETE_LINK) {
+ rcv_msg == SMC_LLC_DELETE_LINK) {
/* flow_start will delay the unexpected msg */
smc_llc_flow_start(&lgr->llc_flow_lcl,
smc_llc_flow_qentry_clr(flow));
return NULL;
}
+ pr_warn_once("smc: SMC-R lg %*phN dropped unexpected LLC msg: "
+ "msg %d exp %d flow %d role %d flags %x\n",
+ SMC_LGR_ID_SIZE, &lgr->id, rcv_msg, exp_msg,
+ flow->type, lgr->role,
+ flow->qentry->msg.raw.hdr.flags);
smc_llc_flow_qentry_del(flow);
}
out:
@@ -409,7 +428,7 @@ static int smc_llc_send_confirm_rkey(struct smc_link *send_link,
rtok_ix = 1;
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
link = &send_link->lgr->lnk[i];
- if (link->state == SMC_LNK_ACTIVE && link != send_link) {
+ if (smc_link_active(link) && link != send_link) {
rkeyllc->rtoken[rtok_ix].link_id = link->link_id;
rkeyllc->rtoken[rtok_ix].rmb_key =
htonl(rmb_desc->mr_rx[link->link_idx]->rkey);
@@ -876,6 +895,36 @@ out:
return rc;
}
+/* as an SMC client, invite server to start the add_link processing */
+static void smc_llc_cli_add_link_invite(struct smc_link *link,
+ struct smc_llc_qentry *qentry)
+{
+ struct smc_link_group *lgr = smc_get_lgr(link);
+ struct smc_init_info ini;
+
+ if (lgr->type == SMC_LGR_SYMMETRIC ||
+ lgr->type == SMC_LGR_ASYMMETRIC_PEER)
+ goto out;
+
+ ini.vlan_id = lgr->vlan_id;
+ smc_pnet_find_alt_roce(lgr, &ini, link->smcibdev);
+ if (!ini.ib_dev)
+ goto out;
+
+ smc_llc_send_add_link(link, ini.ib_dev->mac[ini.ib_port - 1],
+ ini.ib_gid, NULL, SMC_LLC_REQ);
+out:
+ kfree(qentry);
+}
+
+static bool smc_llc_is_local_add_link(union smc_llc_msg *llc)
+{
+ if (llc->raw.hdr.common.type == SMC_LLC_ADD_LINK &&
+ !llc->add_link.qp_mtu && !llc->add_link.link_num)
+ return true;
+ return false;
+}
+
static void smc_llc_process_cli_add_link(struct smc_link_group *lgr)
{
struct smc_llc_qentry *qentry;
@@ -883,7 +932,10 @@ static void smc_llc_process_cli_add_link(struct smc_link_group *lgr)
qentry = smc_llc_flow_qentry_clr(&lgr->llc_flow_lcl);
mutex_lock(&lgr->llc_conf_mutex);
- smc_llc_cli_add_link(qentry->link, qentry);
+ if (smc_llc_is_local_add_link(&qentry->msg))
+ smc_llc_cli_add_link_invite(qentry->link, qentry);
+ else
+ smc_llc_cli_add_link(qentry->link, qentry);
mutex_unlock(&lgr->llc_conf_mutex);
}
@@ -892,7 +944,7 @@ static int smc_llc_active_link_count(struct smc_link_group *lgr)
int i, link_count = 0;
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
- if (!smc_link_usable(&lgr->lnk[i]))
+ if (!smc_link_active(&lgr->lnk[i]))
continue;
link_count++;
}
@@ -1032,12 +1084,14 @@ static int smc_llc_srv_conf_link(struct smc_link *link,
if (rc)
return -ENOLINK;
/* receive CONFIRM LINK response over the RoCE fabric */
- qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_FIRST_TIME,
- SMC_LLC_CONFIRM_LINK);
- if (!qentry) {
+ qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_FIRST_TIME, 0);
+ if (!qentry ||
+ qentry->msg.raw.hdr.common.type != SMC_LLC_CONFIRM_LINK) {
/* send DELETE LINK */
smc_llc_send_delete_link(link, link_new->link_id, SMC_LLC_REQ,
false, SMC_LLC_DEL_LOST_PATH);
+ if (qentry)
+ smc_llc_flow_qentry_del(&lgr->llc_flow_lcl);
return -ENOLINK;
}
smc_llc_save_peer_uid(qentry);
@@ -1139,14 +1193,14 @@ static void smc_llc_process_srv_add_link(struct smc_link_group *lgr)
mutex_unlock(&lgr->llc_conf_mutex);
}
-/* enqueue a local add_link req to trigger a new add_link flow, only as SERV */
-void smc_llc_srv_add_link_local(struct smc_link *link)
+/* enqueue a local add_link req to trigger a new add_link flow */
+void smc_llc_add_link_local(struct smc_link *link)
{
struct smc_llc_msg_add_link add_llc = {0};
add_llc.hd.length = sizeof(add_llc);
add_llc.hd.common.type = SMC_LLC_ADD_LINK;
- /* no dev and port needed, we as server ignore client data anyway */
+ /* no dev and port needed */
smc_llc_enqueue(link, (union smc_llc_msg *)&add_llc);
}
@@ -1222,8 +1276,8 @@ static void smc_llc_process_cli_delete_link(struct smc_link_group *lgr)
smc_llc_send_message(lnk, &qentry->msg); /* response */
if (smc_link_downing(&lnk_del->state)) {
- smc_switch_conns(lgr, lnk_del, false);
- smc_wr_tx_wait_no_pending_sends(lnk_del);
+ if (smc_switch_conns(lgr, lnk_del, false))
+ smc_wr_tx_wait_no_pending_sends(lnk_del);
}
smcr_link_clear(lnk_del, true);
@@ -1297,8 +1351,8 @@ static void smc_llc_process_srv_delete_link(struct smc_link_group *lgr)
goto out; /* asymmetric link already deleted */
if (smc_link_downing(&lnk_del->state)) {
- smc_switch_conns(lgr, lnk_del, false);
- smc_wr_tx_wait_no_pending_sends(lnk_del);
+ if (smc_switch_conns(lgr, lnk_del, false))
+ smc_wr_tx_wait_no_pending_sends(lnk_del);
}
if (!list_empty(&lgr->list)) {
/* qentry is either a request from peer (send it back to
@@ -1326,7 +1380,7 @@ static void smc_llc_process_srv_delete_link(struct smc_link_group *lgr)
if (lgr->type == SMC_LGR_SINGLE && !list_empty(&lgr->list)) {
/* trigger setup of asymm alt link */
- smc_llc_srv_add_link_local(lnk);
+ smc_llc_add_link_local(lnk);
}
out:
mutex_unlock(&lgr->llc_conf_mutex);
@@ -1455,11 +1509,22 @@ static void smc_llc_event_handler(struct smc_llc_qentry *qentry)
if (list_empty(&lgr->list))
goto out; /* lgr is terminating */
if (lgr->role == SMC_CLNT) {
- if (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_ADD_LINK) {
+ if (smc_llc_is_local_add_link(llc)) {
+ if (lgr->llc_flow_lcl.type ==
+ SMC_LLC_FLOW_ADD_LINK)
+ break; /* add_link in progress */
+ if (smc_llc_flow_start(&lgr->llc_flow_lcl,
+ qentry)) {
+ schedule_work(&lgr->llc_add_link_work);
+ }
+ return;
+ }
+ if (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_ADD_LINK &&
+ !lgr->llc_flow_lcl.qentry) {
/* a flow is waiting for this message */
smc_llc_flow_qentry_set(&lgr->llc_flow_lcl,
qentry);
- wake_up_interruptible(&lgr->llc_waiter);
+ wake_up(&lgr->llc_msg_waiter);
} else if (smc_llc_flow_start(&lgr->llc_flow_lcl,
qentry)) {
schedule_work(&lgr->llc_add_link_work);
@@ -1474,33 +1539,18 @@ static void smc_llc_event_handler(struct smc_llc_qentry *qentry)
if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE) {
/* a flow is waiting for this message */
smc_llc_flow_qentry_set(&lgr->llc_flow_lcl, qentry);
- wake_up_interruptible(&lgr->llc_waiter);
+ wake_up(&lgr->llc_msg_waiter);
return;
}
break;
case SMC_LLC_DELETE_LINK:
- if (lgr->role == SMC_CLNT) {
- /* server requests to delete this link, send response */
- if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE) {
- /* DEL LINK REQ during ADD LINK SEQ */
- smc_llc_flow_qentry_set(&lgr->llc_flow_lcl,
- qentry);
- wake_up_interruptible(&lgr->llc_waiter);
- } else if (smc_llc_flow_start(&lgr->llc_flow_lcl,
- qentry)) {
- schedule_work(&lgr->llc_del_link_work);
- }
- } else {
- if (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_ADD_LINK &&
- !lgr->llc_flow_lcl.qentry) {
- /* DEL LINK REQ during ADD LINK SEQ */
- smc_llc_flow_qentry_set(&lgr->llc_flow_lcl,
- qentry);
- wake_up_interruptible(&lgr->llc_waiter);
- } else if (smc_llc_flow_start(&lgr->llc_flow_lcl,
- qentry)) {
- schedule_work(&lgr->llc_del_link_work);
- }
+ if (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_ADD_LINK &&
+ !lgr->llc_flow_lcl.qentry) {
+ /* DEL LINK REQ during ADD LINK SEQ */
+ smc_llc_flow_qentry_set(&lgr->llc_flow_lcl, qentry);
+ wake_up(&lgr->llc_msg_waiter);
+ } else if (smc_llc_flow_start(&lgr->llc_flow_lcl, qentry)) {
+ schedule_work(&lgr->llc_del_link_work);
}
return;
case SMC_LLC_CONFIRM_RKEY:
@@ -1566,23 +1616,30 @@ again:
static void smc_llc_rx_response(struct smc_link *link,
struct smc_llc_qentry *qentry)
{
+ enum smc_llc_flowtype flowtype = link->lgr->llc_flow_lcl.type;
+ struct smc_llc_flow *flow = &link->lgr->llc_flow_lcl;
u8 llc_type = qentry->msg.raw.hdr.common.type;
switch (llc_type) {
case SMC_LLC_TEST_LINK:
- if (link->state == SMC_LNK_ACTIVE)
+ if (smc_link_active(link))
complete(&link->llc_testlink_resp);
break;
case SMC_LLC_ADD_LINK:
- case SMC_LLC_DELETE_LINK:
- case SMC_LLC_CONFIRM_LINK:
case SMC_LLC_ADD_LINK_CONT:
+ case SMC_LLC_CONFIRM_LINK:
+ if (flowtype != SMC_LLC_FLOW_ADD_LINK || flow->qentry)
+ break; /* drop out-of-flow response */
+ goto assign;
+ case SMC_LLC_DELETE_LINK:
+ if (flowtype != SMC_LLC_FLOW_DEL_LINK || flow->qentry)
+ break; /* drop out-of-flow response */
+ goto assign;
case SMC_LLC_CONFIRM_RKEY:
case SMC_LLC_DELETE_RKEY:
- /* assign responses to the local flow, we requested them */
- smc_llc_flow_qentry_set(&link->lgr->llc_flow_lcl, qentry);
- wake_up_interruptible(&link->lgr->llc_waiter);
- return;
+ if (flowtype != SMC_LLC_FLOW_RKEY || flow->qentry)
+ break; /* drop out-of-flow response */
+ goto assign;
case SMC_LLC_CONFIRM_RKEY_CONT:
/* not used because max links is 3 */
break;
@@ -1591,6 +1648,11 @@ static void smc_llc_rx_response(struct smc_link *link,
break;
}
kfree(qentry);
+ return;
+assign:
+ /* assign responses to the local flow, we requested them */
+ smc_llc_flow_qentry_set(&link->lgr->llc_flow_lcl, qentry);
+ wake_up(&link->lgr->llc_msg_waiter);
}
static void smc_llc_enqueue(struct smc_link *link, union smc_llc_msg *llc)
@@ -1616,7 +1678,7 @@ static void smc_llc_enqueue(struct smc_link *link, union smc_llc_msg *llc)
spin_lock_irqsave(&lgr->llc_event_q_lock, flags);
list_add_tail(&qentry->list, &lgr->llc_event_q);
spin_unlock_irqrestore(&lgr->llc_event_q_lock, flags);
- schedule_work(&link->lgr->llc_event_work);
+ schedule_work(&lgr->llc_event_work);
}
/* copy received msg and add it to the event queue */
@@ -1644,7 +1706,7 @@ static void smc_llc_testlink_work(struct work_struct *work)
u8 user_data[16] = { 0 };
int rc;
- if (link->state != SMC_LNK_ACTIVE)
+ if (!smc_link_active(link))
return; /* don't reschedule worker */
expire_time = link->wr_rx_tstamp + link->llc_testlink_time;
if (time_is_after_jiffies(expire_time)) {
@@ -1656,7 +1718,7 @@ static void smc_llc_testlink_work(struct work_struct *work)
/* receive TEST LINK response over RoCE fabric */
rc = wait_for_completion_interruptible_timeout(&link->llc_testlink_resp,
SMC_LLC_WAIT_TIME);
- if (link->state != SMC_LNK_ACTIVE)
+ if (!smc_link_active(link))
return; /* link state changed */
if (rc <= 0) {
smcr_link_down_cond_sched(link);
@@ -1677,7 +1739,8 @@ void smc_llc_lgr_init(struct smc_link_group *lgr, struct smc_sock *smc)
INIT_LIST_HEAD(&lgr->llc_event_q);
spin_lock_init(&lgr->llc_event_q_lock);
spin_lock_init(&lgr->llc_flow_lock);
- init_waitqueue_head(&lgr->llc_waiter);
+ init_waitqueue_head(&lgr->llc_flow_waiter);
+ init_waitqueue_head(&lgr->llc_msg_waiter);
mutex_init(&lgr->llc_conf_mutex);
lgr->llc_testlink_time = net->ipv4.sysctl_tcp_keepalive_time;
}
@@ -1686,7 +1749,8 @@ void smc_llc_lgr_init(struct smc_link_group *lgr, struct smc_sock *smc)
void smc_llc_lgr_clear(struct smc_link_group *lgr)
{
smc_llc_event_flush(lgr);
- wake_up_interruptible_all(&lgr->llc_waiter);
+ wake_up_all(&lgr->llc_flow_waiter);
+ wake_up_all(&lgr->llc_msg_waiter);
cancel_work_sync(&lgr->llc_event_work);
cancel_work_sync(&lgr->llc_add_link_work);
cancel_work_sync(&lgr->llc_del_link_work);
diff --git a/net/smc/smc_llc.h b/net/smc/smc_llc.h
index a5d2fe3eea61..cc00a2ec4e92 100644
--- a/net/smc/smc_llc.h
+++ b/net/smc/smc_llc.h
@@ -103,7 +103,7 @@ void smc_llc_send_link_delete_all(struct smc_link_group *lgr, bool ord,
u32 rsn);
int smc_llc_cli_add_link(struct smc_link *link, struct smc_llc_qentry *qentry);
int smc_llc_srv_add_link(struct smc_link *link);
-void smc_llc_srv_add_link_local(struct smc_link *link);
+void smc_llc_add_link_local(struct smc_link *link);
int smc_llc_init(void) __init;
#endif /* SMC_LLC_H */
diff --git a/net/smc/smc_pnet.c b/net/smc/smc_pnet.c
index 014d91b9778e..30e5fac7034e 100644
--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/list.h>
#include <linux/ctype.h>
+#include <linux/mutex.h>
#include <net/netlink.h>
#include <net/genetlink.h>
@@ -129,7 +130,7 @@ static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name)
return rc;
/* remove ib devices */
- spin_lock(&smc_ib_devices.lock);
+ mutex_lock(&smc_ib_devices.mutex);
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
for (ibport = 0; ibport < SMC_MAX_PORTS; ibport++) {
if (ibdev->pnetid_by_user[ibport] &&
@@ -149,9 +150,9 @@ static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name)
}
}
}
- spin_unlock(&smc_ib_devices.lock);
+ mutex_unlock(&smc_ib_devices.mutex);
/* remove smcd devices */
- spin_lock(&smcd_dev_list.lock);
+ mutex_lock(&smcd_dev_list.mutex);
list_for_each_entry(smcd_dev, &smcd_dev_list.list, list) {
if (smcd_dev->pnetid_by_user &&
(!pnet_name ||
@@ -165,7 +166,7 @@ static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name)
rc = 0;
}
}
- spin_unlock(&smcd_dev_list.lock);
+ mutex_unlock(&smcd_dev_list.mutex);
return rc;
}
@@ -240,14 +241,14 @@ static bool smc_pnet_apply_ib(struct smc_ib_device *ib_dev, u8 ib_port,
u8 pnet_null[SMC_MAX_PNETID_LEN] = {0};
bool applied = false;
- spin_lock(&smc_ib_devices.lock);
+ mutex_lock(&smc_ib_devices.mutex);
if (smc_pnet_match(ib_dev->pnetid[ib_port - 1], pnet_null)) {
memcpy(ib_dev->pnetid[ib_port - 1], pnet_name,
SMC_MAX_PNETID_LEN);
ib_dev->pnetid_by_user[ib_port - 1] = true;
applied = true;
}
- spin_unlock(&smc_ib_devices.lock);
+ mutex_unlock(&smc_ib_devices.mutex);
return applied;
}
@@ -258,13 +259,13 @@ static bool smc_pnet_apply_smcd(struct smcd_dev *smcd_dev, char *pnet_name)
u8 pnet_null[SMC_MAX_PNETID_LEN] = {0};
bool applied = false;
- spin_lock(&smcd_dev_list.lock);
+ mutex_lock(&smcd_dev_list.mutex);
if (smc_pnet_match(smcd_dev->pnetid, pnet_null)) {
memcpy(smcd_dev->pnetid, pnet_name, SMC_MAX_PNETID_LEN);
smcd_dev->pnetid_by_user = true;
applied = true;
}
- spin_unlock(&smcd_dev_list.lock);
+ mutex_unlock(&smcd_dev_list.mutex);
return applied;
}
@@ -300,7 +301,7 @@ static struct smc_ib_device *smc_pnet_find_ib(char *ib_name)
{
struct smc_ib_device *ibdev;
- spin_lock(&smc_ib_devices.lock);
+ mutex_lock(&smc_ib_devices.mutex);
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
if (!strncmp(ibdev->ibdev->name, ib_name,
sizeof(ibdev->ibdev->name)) ||
@@ -311,7 +312,7 @@ static struct smc_ib_device *smc_pnet_find_ib(char *ib_name)
}
ibdev = NULL;
out:
- spin_unlock(&smc_ib_devices.lock);
+ mutex_unlock(&smc_ib_devices.mutex);
return ibdev;
}
@@ -320,7 +321,7 @@ static struct smcd_dev *smc_pnet_find_smcd(char *smcd_name)
{
struct smcd_dev *smcd_dev;
- spin_lock(&smcd_dev_list.lock);
+ mutex_lock(&smcd_dev_list.mutex);
list_for_each_entry(smcd_dev, &smcd_dev_list.list, list) {
if (!strncmp(dev_name(&smcd_dev->dev), smcd_name,
IB_DEVICE_NAME_MAX - 1))
@@ -328,7 +329,7 @@ static struct smcd_dev *smc_pnet_find_smcd(char *smcd_name)
}
smcd_dev = NULL;
out:
- spin_unlock(&smcd_dev_list.lock);
+ mutex_unlock(&smcd_dev_list.mutex);
return smcd_dev;
}
@@ -825,7 +826,7 @@ static void _smc_pnet_find_roce_by_pnetid(u8 *pnet_id,
int i;
ini->ib_dev = NULL;
- spin_lock(&smc_ib_devices.lock);
+ mutex_lock(&smc_ib_devices.mutex);
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
if (ibdev == known_dev)
continue;
@@ -844,7 +845,7 @@ static void _smc_pnet_find_roce_by_pnetid(u8 *pnet_id,
}
}
out:
- spin_unlock(&smc_ib_devices.lock);
+ mutex_unlock(&smc_ib_devices.mutex);
}
/* find alternate roce device with same pnet_id and vlan_id */
@@ -863,7 +864,7 @@ static void smc_pnet_find_rdma_dev(struct net_device *netdev,
{
struct smc_ib_device *ibdev;
- spin_lock(&smc_ib_devices.lock);
+ mutex_lock(&smc_ib_devices.mutex);
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
struct net_device *ndev;
int i;
@@ -888,7 +889,7 @@ static void smc_pnet_find_rdma_dev(struct net_device *netdev,
}
}
}
- spin_unlock(&smc_ib_devices.lock);
+ mutex_unlock(&smc_ib_devices.mutex);
}
/* Determine the corresponding IB device port based on the hardware PNETID.
@@ -924,7 +925,7 @@ static void smc_pnet_find_ism_by_pnetid(struct net_device *ndev,
smc_pnet_find_ndev_pnetid_by_table(ndev, ndev_pnetid))
return; /* pnetid could not be determined */
- spin_lock(&smcd_dev_list.lock);
+ mutex_lock(&smcd_dev_list.mutex);
list_for_each_entry(ismdev, &smcd_dev_list.list, list) {
if (smc_pnet_match(ismdev->pnetid, ndev_pnetid) &&
!ismdev->going_away) {
@@ -932,7 +933,7 @@ static void smc_pnet_find_ism_by_pnetid(struct net_device *ndev,
break;
}
}
- spin_unlock(&smcd_dev_list.lock);
+ mutex_unlock(&smcd_dev_list.mutex);
}
/* PNET table analysis for a given sock:
diff --git a/net/smc/smc_wr.c b/net/smc/smc_wr.c
index 7239ba9b99dc..1e23cdd41eb1 100644
--- a/net/smc/smc_wr.c
+++ b/net/smc/smc_wr.c
@@ -169,6 +169,8 @@ void smc_wr_tx_cq_handler(struct ib_cq *ib_cq, void *cq_context)
static inline int smc_wr_tx_get_free_slot_index(struct smc_link *link, u32 *idx)
{
*idx = link->wr_tx_cnt;
+ if (!smc_link_usable(link))
+ return -ENOLINK;
for_each_clear_bit(*idx, link->wr_tx_mask, link->wr_tx_cnt) {
if (!test_and_set_bit(*idx, link->wr_tx_mask))
return 0;
@@ -560,15 +562,15 @@ void smc_wr_free_link(struct smc_link *lnk)
{
struct ib_device *ibdev;
+ if (!lnk->smcibdev)
+ return;
+ ibdev = lnk->smcibdev->ibdev;
+
if (smc_wr_tx_wait_no_pending_sends(lnk))
memset(lnk->wr_tx_mask, 0,
BITS_TO_LONGS(SMC_WR_BUF_CNT) *
sizeof(*lnk->wr_tx_mask));
- if (!lnk->smcibdev)
- return;
- ibdev = lnk->smcibdev->ibdev;
-
if (lnk->wr_rx_dma_addr) {
ib_dma_unmap_single(ibdev, lnk->wr_rx_dma_addr,
SMC_WR_BUF_SIZE * lnk->wr_rx_cnt,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 14:05:22 +0100