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Message-Id: <20191009080747.95516-2-kgraul@linux.ibm.com>
Date: Wed, 9 Oct 2019 10:07:43 +0200
From: Karsten Graul <kgraul@...ux.ibm.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-s390@...r.kernel.org,
gor@...ux.ibm.com, heiko.carstens@...ibm.com, raspl@...ux.ibm.com,
ubraun@...ux.ibm.com
Subject: [PATCH net-next 1/5] net/smc: separate SMCD and SMCR link group lists
From: Ursula Braun <ubraun@...ux.ibm.com>
Currently SMCD and SMCR link groups are maintained in one list.
To facilitate abnormal termination handling they are split into
a separate list for SMCR link groups and separate lists for SMCD
link groups per SMCD device.
Signed-off-by: Ursula Braun <ubraun@...ux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@...ux.ibm.com>
---
include/net/smc.h | 1 +
net/smc/smc_core.c | 24 +++++++++++++++++-------
net/smc/smc_ism.c | 1 +
3 files changed, 19 insertions(+), 7 deletions(-)
diff --git a/include/net/smc.h b/include/net/smc.h
index bd9c0fb3b577..c08e8c415673 100644
--- a/include/net/smc.h
+++ b/include/net/smc.h
@@ -75,6 +75,7 @@ struct smcd_dev {
struct workqueue_struct *event_wq;
u8 pnetid[SMC_MAX_PNETID_LEN];
bool pnetid_by_user;
+ struct list_head lgr_list;
};
struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index 2d2850adc2a3..92612978d783 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -198,6 +198,7 @@ static void smc_lgr_free_work(struct work_struct *work)
static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
{
struct smc_link_group *lgr;
+ struct list_head *lgr_list;
struct smc_link *lnk;
u8 rndvec[3];
int rc = 0;
@@ -233,6 +234,7 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
/* SMC-D specific settings */
lgr->peer_gid = ini->ism_gid;
lgr->smcd = ini->ism_dev;
+ lgr_list = &ini->ism_dev->lgr_list;
} else {
/* SMC-R specific settings */
lgr->role = smc->listen_smc ? SMC_SERV : SMC_CLNT;
@@ -245,6 +247,7 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
lnk->link_id = SMC_SINGLE_LINK;
lnk->smcibdev = ini->ib_dev;
lnk->ibport = ini->ib_port;
+ lgr_list = &smc_lgr_list.list;
lnk->path_mtu =
ini->ib_dev->pattr[ini->ib_port - 1].active_mtu;
if (!ini->ib_dev->initialized)
@@ -275,7 +278,7 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
}
smc->conn.lgr = lgr;
spin_lock_bh(&smc_lgr_list.lock);
- list_add(&lgr->list, &smc_lgr_list.list);
+ list_add(&lgr->list, lgr_list);
spin_unlock_bh(&smc_lgr_list.lock);
return 0;
@@ -512,9 +515,8 @@ void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid, unsigned short vlan)
/* run common cleanup function and build free list */
spin_lock_bh(&smc_lgr_list.lock);
- list_for_each_entry_safe(lgr, l, &smc_lgr_list.list, list) {
- if (lgr->is_smcd && lgr->smcd == dev &&
- (!peer_gid || lgr->peer_gid == peer_gid) &&
+ list_for_each_entry_safe(lgr, l, &dev->lgr_list, list) {
+ if ((!peer_gid || lgr->peer_gid == peer_gid) &&
(vlan == VLAN_VID_MASK || lgr->vlan_id == vlan)) {
__smc_lgr_terminate(lgr);
list_move(&lgr->list, &lgr_free_list);
@@ -604,10 +606,12 @@ static bool smcd_lgr_match(struct smc_link_group *lgr,
int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini)
{
struct smc_connection *conn = &smc->conn;
+ struct list_head *lgr_list;
struct smc_link_group *lgr;
enum smc_lgr_role role;
int rc = 0;
+ lgr_list = ini->is_smcd ? &ini->ism_dev->lgr_list : &smc_lgr_list.list;
ini->cln_first_contact = SMC_FIRST_CONTACT;
role = smc->listen_smc ? SMC_SERV : SMC_CLNT;
if (role == SMC_CLNT && ini->srv_first_contact)
@@ -616,7 +620,7 @@ int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini)
/* determine if an existing link group can be reused */
spin_lock_bh(&smc_lgr_list.lock);
- list_for_each_entry(lgr, &smc_lgr_list.list, list) {
+ list_for_each_entry(lgr, lgr_list, list) {
write_lock_bh(&lgr->conns_lock);
if ((ini->is_smcd ?
smcd_lgr_match(lgr, ini->ism_dev, ini->ism_gid) :
@@ -1026,11 +1030,17 @@ void smc_core_exit(void)
{
struct smc_link_group *lgr, *lg;
LIST_HEAD(lgr_freeing_list);
+ struct smcd_dev *smcd;
spin_lock_bh(&smc_lgr_list.lock);
- if (!list_empty(&smc_lgr_list.list))
- list_splice_init(&smc_lgr_list.list, &lgr_freeing_list);
+ list_splice_init(&smc_lgr_list.list, &lgr_freeing_list);
spin_unlock_bh(&smc_lgr_list.lock);
+
+ spin_lock(&smcd_dev_list.lock);
+ list_for_each_entry(smcd, &smcd_dev_list.list, list)
+ list_splice_init(&smcd->lgr_list, &lgr_freeing_list);
+ spin_unlock(&smcd_dev_list.lock);
+
list_for_each_entry_safe(lgr, lg, &lgr_freeing_list, list) {
list_del_init(&lgr->list);
if (!lgr->is_smcd) {
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index e89e918b88e0..674eb5ae2320 100644
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -287,6 +287,7 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
spin_lock_init(&smcd->lock);
INIT_LIST_HEAD(&smcd->vlan);
+ INIT_LIST_HEAD(&smcd->lgr_list);
smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)",
WQ_MEM_RECLAIM, name);
if (!smcd->event_wq) {
--
2.17.1
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