From 4dadd151b26589fd0520feb97c93ee981b393a99 Mon Sep 17 00:00:00 2001 From: Karsten Graul Date: Sun, 3 May 2020 14:38:50 +0200 Subject: net/smc: enqueue local LLC messages As SMC server, when a second link was deleted, trigger the setup of an asymmetric link. Do this by enqueueing a local ADD_LINK message which is processed by the LLC layer as if it were received from peer. Do the same when a new IB port became active and a new link could be created. smc_llc_srv_add_link_local() enqueues a local ADD_LINK message. And smc_llc_srv_delete_link_local() is used the same way to enqueue a local DELETE_LINK message. This is used when an IB port is no longer active. Signed-off-by: Karsten Graul Reviewed-by: Ursula Braun Signed-off-by: David S. Miller --- net/smc/smc_llc.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) (limited to 'net/smc/smc_llc.c') diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index ac065f6d60dc..7675ccd6f3c3 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -159,6 +159,8 @@ struct smc_llc_qentry { union smc_llc_msg msg; }; +static void smc_llc_enqueue(struct smc_link *link, union smc_llc_msg *llc); + struct smc_llc_qentry *smc_llc_flow_qentry_clr(struct smc_llc_flow *flow) { struct smc_llc_qentry *qentry = flow->qentry; @@ -1110,6 +1112,17 @@ 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) +{ + 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 */ + smc_llc_enqueue(link, (union smc_llc_msg *)&add_llc); +} + /* worker to process an add link message */ static void smc_llc_add_link_work(struct work_struct *work) { @@ -1130,6 +1143,21 @@ out: smc_llc_flow_stop(lgr, &lgr->llc_flow_lcl); } +/* enqueue a local del_link msg to trigger a new del_link flow, + * called only for role SMC_SERV + */ +void smc_llc_srv_delete_link_local(struct smc_link *link, u8 del_link_id) +{ + struct smc_llc_msg_del_link del_llc = {0}; + + del_llc.hd.length = sizeof(del_llc); + del_llc.hd.common.type = SMC_LLC_DELETE_LINK; + del_llc.link_num = del_link_id; + del_llc.reason = htonl(SMC_LLC_DEL_LOST_PATH); + del_llc.hd.flags |= SMC_LLC_FLAG_DEL_LINK_ORDERLY; + smc_llc_enqueue(link, (union smc_llc_msg *)&del_llc); +} + static void smc_llc_process_cli_delete_link(struct smc_link_group *lgr) { struct smc_link *lnk_del = NULL, *lnk_asym, *lnk; @@ -1250,7 +1278,7 @@ 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 */ - /* tbd: call smc_llc_srv_add_link_local(lnk); */ + smc_llc_srv_add_link_local(lnk); } out: mutex_unlock(&lgr->llc_conf_mutex); -- cgit v1.2.3