diff options
author | Karsten Graul <kgraul@linux.ibm.com> | 2020-05-03 14:38:50 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2020-05-03 16:08:07 -0700 |
commit | 4dadd151b26589fd0520feb97c93ee981b393a99 (patch) | |
tree | 2405840a8f7fc638a4ca0e87344bbf9560a42683 /net/smc | |
parent | 08ae27ddfb6514a8316b17256cd4262bb6931c1f (diff) | |
download | linux-stable-4dadd151b26589fd0520feb97c93ee981b393a99.tar.gz linux-stable-4dadd151b26589fd0520feb97c93ee981b393a99.tar.bz2 linux-stable-4dadd151b26589fd0520feb97c93ee981b393a99.zip |
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 This is used when an IB port is no longer
active.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 <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc')
-rw-r--r-- | net/smc/smc_core.c | 3 | ||||
-rw-r--r-- | net/smc/smc_llc.c | 30 | ||||
-rw-r--r-- | net/smc/smc_llc.h | 2 |
3 files changed, 33 insertions, 2 deletions
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index a964304283fa..32a6cadc5c1f 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -883,7 +883,7 @@ static void smcr_link_up(struct smc_link_group *lgr, link = smc_llc_usable_link(lgr); if (!link) return; - /* tbd: call smc_llc_srv_add_link_local(link); */ + smc_llc_srv_add_link_local(link); } else { /* invite server to start add link processing */ u8 gid[SMC_GID_SIZE]; @@ -954,6 +954,7 @@ static void smcr_link_down(struct smc_link *lnk) if (lgr->role == SMC_SERV) { /* trigger local delete link processing */ + smc_llc_srv_delete_link_local(to_lnk, del_link_id); } else { if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE) { /* another llc task is ongoing */ 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); diff --git a/net/smc/smc_llc.h b/net/smc/smc_llc.h index 1a7748d0541f..c335fc5f363c 100644 --- a/net/smc/smc_llc.h +++ b/net/smc/smc_llc.h @@ -69,6 +69,7 @@ int smc_llc_send_add_link(struct smc_link *link, u8 mac[], u8 gid[], int smc_llc_send_delete_link(struct smc_link *link, u8 link_del_id, enum smc_llc_reqresp reqresp, bool orderly, u32 reason); +void smc_llc_srv_delete_link_local(struct smc_link *link, u8 del_link_id); void smc_llc_lgr_init(struct smc_link_group *lgr, struct smc_sock *smc); void smc_llc_lgr_clear(struct smc_link_group *lgr); int smc_llc_link_init(struct smc_link *link); @@ -90,6 +91,7 @@ struct smc_llc_qentry *smc_llc_flow_qentry_clr(struct smc_llc_flow *flow); void smc_llc_flow_qentry_del(struct smc_llc_flow *flow); 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); int smc_llc_init(void) __init; #endif /* SMC_LLC_H */ |