net/smc: separate SMCD and SMCR link group lists

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@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

diff --git a/include/net/smc.h b/include/net/smc.h
index bd9c0fb..c08e8c4 100644 (file)
--- 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 4ca50dd..46d6795 100644 (file)
--- 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) :
@@ -1029,11 +1033,17 @@ 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 e89e918..674eb5a 100644 (file)
--- 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) {