From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Simmons Date: Thu, 27 Feb 2020 16:13:28 -0500 Subject: [lustre-devel] [PATCH 340/622] lnet: Cleanup rcd In-Reply-To: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> References: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> Message-ID: <1582838290-17243-341-git-send-email-jsimmons@infradead.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org From: Amir Shehata Cleanup all code pertaining to rcd, as routing code will use discovery going forward and there will be no need to keep its own pinging code. test_215 looks at the routers file which had its format changed. Update the test to reflect the change. WC-bug-id: https://jira.whamcloud.com/browse/LU-11299 Lustre-commit: 9ee453928ab8 ("LU-11299 lnet: Cleanup rcd") Signed-off-by: Amir Shehata Reviewed-on: https://review.whamcloud.com/33187 Reviewed-by: Olaf Weber Reviewed-by: Sebastien Buisson Signed-off-by: James Simmons --- include/linux/lnet/lib-lnet.h | 4 - include/linux/lnet/lib-types.h | 40 +------ net/lnet/lnet/api-ni.c | 24 +++- net/lnet/lnet/lib-move.c | 11 -- net/lnet/lnet/router.c | 255 ----------------------------------------- net/lnet/lnet/router_proc.c | 66 ++--------- 6 files changed, 31 insertions(+), 369 deletions(-) diff --git a/include/linux/lnet/lib-lnet.h b/include/linux/lnet/lib-lnet.h index 0007adf..8730670 100644 --- a/include/linux/lnet/lib-lnet.h +++ b/include/linux/lnet/lib-lnet.h @@ -748,11 +748,7 @@ int lnet_sock_connect(struct socket **sockp, int *fatal, bool lnet_router_checker_active(void); void lnet_check_routers(void); -int lnet_router_pre_mt_start(void); void lnet_router_post_mt_start(void); -void lnet_prune_rc_data(int wait_unlink); -void lnet_router_cleanup(void); -void lnet_router_ni_update_locked(struct lnet_peer_ni *gw, u32 net); void lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf); int lnet_ping_info_validate(struct lnet_ping_info *pinfo); diff --git a/include/linux/lnet/lib-types.h b/include/linux/lnet/lib-types.h index 9a09fad..495e805 100644 --- a/include/linux/lnet/lib-types.h +++ b/include/linux/lnet/lib-types.h @@ -509,20 +509,6 @@ struct lnet_ping_buffer { #define LNET_PING_INFO_TO_BUFFER(PINFO) \ container_of((PINFO), struct lnet_ping_buffer, pb_info) -/* router checker data, per router */ -struct lnet_rc_data { - /* chain on the_lnet.ln_zombie_rcd or ln_deathrow_rcd */ - struct list_head rcd_list; - /* ping buffer MD */ - struct lnet_handle_md rcd_mdh; - /* reference to gateway */ - struct lnet_peer_ni *rcd_gateway; - /* ping buffer */ - struct lnet_ping_buffer *rcd_pingbuffer; - /* desired size of buffer */ - int rcd_nnis; -}; - struct lnet_peer_ni { /* chain on lpn_peer_nis */ struct list_head lpni_peer_nis; @@ -553,22 +539,8 @@ struct lnet_peer_ni { int lpni_rtrcredits; /* low water mark */ int lpni_minrtrcredits; - /* notification outstanding? */ - bool lpni_notify; - /* outstanding notification for LND? */ - bool lpni_notifylnd; - /* some thread is handling notification */ - bool lpni_notifying; - /* # times router went dead<->alive */ - int lpni_alive_count; - /* ytes queued for sending */ + /* bytes queued for sending */ long lpni_txqnob; - /* time of last aliveness news */ - time64_t lpni_timestamp; - /* when I was last alive */ - time64_t lpni_last_alive; - /* when lpni_ni was queried last time */ - time64_t lpni_last_query; /* network peer is on */ struct lnet_net *lpni_net; /* peer's NID */ @@ -598,8 +570,6 @@ struct lnet_peer_ni { } lpni_pref; /* number of preferred NIDs in lnpi_pref_nids */ u32 lpni_pref_nnids; - /* router checker state */ - struct lnet_rc_data *lpni_rcd; }; /* Preferred path added due to traffic on non-MR peer_ni */ @@ -823,8 +793,6 @@ struct lnet_route { u32 lr_lnet; /* sequence for round-robin */ int lr_seq; - /* number of down NIs */ - unsigned int lr_downis; /* how far I am */ u32 lr_hops; /* route priority */ @@ -1115,12 +1083,6 @@ struct lnet { /* monitor thread startup/shutdown state */ enum lnet_rc_state ln_mt_state; - /* router checker's event queue */ - struct lnet_handle_eq ln_rc_eqh; - /* rcd still pending on net */ - struct list_head ln_rcd_deathrow; - /* rcd ready for free */ - struct list_head ln_rcd_zombie; /* serialise startup/shutdown */ struct completion ln_mt_signal; diff --git a/net/lnet/lnet/api-ni.c b/net/lnet/lnet/api-ni.c index d27e9a4..32b4b4f 100644 --- a/net/lnet/lnet/api-ni.c +++ b/net/lnet/lnet/api-ni.c @@ -1457,6 +1457,27 @@ struct lnet_ping_buffer * return count; } +void +lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf) +{ + struct lnet_ni_status *stat; + int nnis; + int i; + + __swab32s(&pbuf->pb_info.pi_magic); + __swab32s(&pbuf->pb_info.pi_features); + __swab32s(&pbuf->pb_info.pi_pid); + __swab32s(&pbuf->pb_info.pi_nnis); + nnis = pbuf->pb_info.pi_nnis; + if (nnis > pbuf->pb_nnis) + nnis = pbuf->pb_nnis; + for (i = 0; i < nnis; i++) { + stat = &pbuf->pb_info.pi_ni[i]; + __swab64s(&stat->ns_nid); + __swab32s(&stat->ns_status); + } +} + int lnet_ping_info_validate(struct lnet_ping_info *pinfo) { @@ -2362,12 +2383,9 @@ int lnet_lib_init(void) } the_lnet.ln_refcount = 0; - LNetInvalidateEQHandle(&the_lnet.ln_rc_eqh); INIT_LIST_HEAD(&the_lnet.ln_lnds); INIT_LIST_HEAD(&the_lnet.ln_net_zombie); - INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie); INIT_LIST_HEAD(&the_lnet.ln_msg_resend); - INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow); /* * The hash table size is the number of bits it takes to express the set diff --git a/net/lnet/lnet/lib-move.c b/net/lnet/lnet/lib-move.c index af3cd1e..2e2299d 100644 --- a/net/lnet/lnet/lib-move.c +++ b/net/lnet/lnet/lib-move.c @@ -3151,9 +3151,6 @@ struct lnet_mt_event_info { false, HZ * interval); } - /* clean up the router checker */ - lnet_prune_rc_data(1); - /* Shutting down */ lnet_net_lock(LNET_LOCK_EX); the_lnet.ln_mt_state = LNET_MT_STATE_SHUTDOWN; @@ -3364,11 +3361,6 @@ int lnet_monitor_thr_start(void) if (rc) goto clean_queues; - /* Pre monitor thread start processing */ - rc = lnet_router_pre_mt_start(); - if (rc) - goto free_mem; - init_completion(&the_lnet.ln_mt_signal); lnet_net_lock(LNET_LOCK_EX); @@ -3393,8 +3385,6 @@ int lnet_monitor_thr_start(void) /* block until event callback signals exit */ wait_for_completion(&the_lnet.ln_mt_signal); /* clean up */ - lnet_router_cleanup(); -free_mem: lnet_net_lock(LNET_LOCK_EX); the_lnet.ln_mt_state = LNET_MT_STATE_SHUTDOWN; lnet_net_unlock(LNET_LOCK_EX); @@ -3430,7 +3420,6 @@ void lnet_monitor_thr_stop(void) LASSERT(the_lnet.ln_mt_state == LNET_MT_STATE_SHUTDOWN); /* perform cleanup tasks */ - lnet_router_cleanup(); lnet_rsp_tracker_clean(); lnet_clean_local_ni_recoveryq(); lnet_clean_peer_ni_recoveryq(); diff --git a/net/lnet/lnet/router.c b/net/lnet/lnet/router.c index bb92759..1399545 100644 --- a/net/lnet/lnet/router.c +++ b/net/lnet/lnet/router.c @@ -220,101 +220,6 @@ bool lnet_is_route_alive(struct lnet_route *route) return route_alive; } -void -lnet_notify_locked(struct lnet_peer_ni *lp, int notifylnd, int alive, - time64_t when) -{ - if (lp->lpni_timestamp > when) { /* out of date information */ - CDEBUG(D_NET, "Out of date\n"); - return; - } - - /* - * This function can be called with different cpt locks being - * held. lpni_alive_count modification needs to be properly protected. - * Significant reads to lpni_alive_count are also protected with - * the same lock - */ - spin_lock(&lp->lpni_lock); - - lp->lpni_timestamp = when; /* update timestamp */ - - /* got old news */ - if (lp->lpni_alive_count != 0 && - /* new date for old news */ - (!lnet_is_peer_ni_alive(lp)) == !alive) { - spin_unlock(&lp->lpni_lock); - CDEBUG(D_NET, "Old news\n"); - return; - } - - /* Flag that notification is outstanding */ - - lp->lpni_alive_count++; - lp->lpni_notify = 1; - lp->lpni_notifylnd = notifylnd; - if (lnet_is_peer_ni_alive(lp)) - lp->lpni_ping_feats = LNET_PING_FEAT_INVAL; /* reset */ - - spin_unlock(&lp->lpni_lock); - - CDEBUG(D_NET, "set %s %d\n", libcfs_nid2str(lp->lpni_nid), alive); -} - -/* - * This function will always be called with lp->lpni_cpt lock held. - */ -static void -lnet_ni_notify_locked(struct lnet_ni *ni, struct lnet_peer_ni *lp) -{ - int alive; - int notifylnd; - - /* - * Notify only in 1 thread at any time to ensure ordered notification. - * NB individual events can be missed; the only guarantee is that you - * always get the most recent news - */ - spin_lock(&lp->lpni_lock); - - if (lp->lpni_notifying || !ni) { - spin_unlock(&lp->lpni_lock); - return; - } - - lp->lpni_notifying = 1; - - /* - * lp->lpni_notify needs to be protected because it can be set in - * lnet_notify_locked(). - */ - while (lp->lpni_notify) { - alive = lnet_is_peer_ni_alive(lp); - notifylnd = lp->lpni_notifylnd; - - lp->lpni_notifylnd = 0; - lp->lpni_notify = 0; - - if (notifylnd && ni->ni_net->net_lnd->lnd_notify) { - spin_unlock(&lp->lpni_lock); - lnet_net_unlock(lp->lpni_cpt); - - /* - * A new notification could happen now; I'll handle it - * when control returns to me - */ - ni->ni_net->net_lnd->lnd_notify(ni, lp->lpni_nid, - alive); - - lnet_net_lock(lp->lpni_cpt); - spin_lock(&lp->lpni_lock); - } - } - - lp->lpni_notifying = 0; - spin_unlock(&lp->lpni_lock); -} - static void lnet_rtr_addref_locked(struct lnet_peer *lp) { @@ -721,93 +626,6 @@ int lnet_get_rtr_pool_cfg(int cpt, struct lnet_ioctl_pool_cfg *pool_cfg) return -ENOENT; } -void -lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf) -{ - struct lnet_ni_status *stat; - int nnis; - int i; - - __swab32s(&pbuf->pb_info.pi_magic); - __swab32s(&pbuf->pb_info.pi_features); - __swab32s(&pbuf->pb_info.pi_pid); - __swab32s(&pbuf->pb_info.pi_nnis); - nnis = pbuf->pb_info.pi_nnis; - if (nnis > pbuf->pb_nnis) - nnis = pbuf->pb_nnis; - for (i = 0; i < nnis; i++) { - stat = &pbuf->pb_info.pi_ni[i]; - __swab64s(&stat->ns_nid); - __swab32s(&stat->ns_status); - } -} - -/** - * TODO: re-implement - */ -static void -lnet_parse_rc_info(struct lnet_rc_data *rcd) -{ - rcd = rcd; -} - -static void -lnet_router_checker_event(struct lnet_event *event) -{ - struct lnet_rc_data *rcd = event->md.user_ptr; - struct lnet_peer_ni *lp; - - LASSERT(rcd); - - if (event->unlinked) { - LNetInvalidateMDHandle(&rcd->rcd_mdh); - return; - } - - LASSERT(event->type == LNET_EVENT_SEND || - event->type == LNET_EVENT_REPLY); - - lp = rcd->rcd_gateway; - LASSERT(lp); - - /* - * NB: it's called with holding lnet_res_lock, we have a few - * places need to hold both locks at the same time, please take - * care of lock ordering - */ - lnet_net_lock(lp->lpni_cpt); - if (!lnet_isrouter(lp) || lp->lpni_rcd != rcd) { - /* ignore if no longer a router or rcd is replaced */ - goto out; - } - - if (event->type == LNET_EVENT_SEND) { - if (!event->status) - goto out; - } - - /* LNET_EVENT_REPLY */ - /* - * A successful REPLY means the router is up. If _any_ comms - * to the router fail I assume it's down (this will happen if - * we ping alive routers to try to detect router death before - * apps get burned). - */ - lnet_notify_locked(lp, 1, !event->status, ktime_get_seconds()); - - /* - * The router checker will wake up very shortly and do the - * actual notification. - * XXX If 'lp' stops being a router before then, it will still - * have the notification pending!!! - */ - if (avoid_asym_router_failure && !event->status) - lnet_parse_rc_info(rcd); - -out: - lnet_net_unlock(lp->lpni_cpt); -} - static void lnet_wait_known_routerstate(void) { @@ -840,26 +658,6 @@ int lnet_get_rtr_pool_cfg(int cpt, struct lnet_ioctl_pool_cfg *pool_cfg) } } -/* TODO: reimplement */ -void -lnet_router_ni_update_locked(struct lnet_peer_ni *gw, u32 net) -{ - struct lnet_route *rte; - struct lnet_peer *lp; - - if ((gw->lpni_ping_feats & LNET_PING_FEAT_NI_STATUS)) - lp = gw->lpni_peer_net->lpn_peer; - else - return; - - list_for_each_entry(rte, &lp->lp_routes, lr_gwlist) { - if (rte->lr_net == net) { - rte->lr_downis = 0; - break; - } - } -} - static void lnet_update_ni_status_locked(void) { @@ -902,25 +700,6 @@ int lnet_get_rtr_pool_cfg(int cpt, struct lnet_ioctl_pool_cfg *pool_cfg) } } -int lnet_router_pre_mt_start(void) -{ - int rc; - - if (check_routers_before_use && - dead_router_check_interval <= 0) { - LCONSOLE_ERROR_MSG(0x10a, "'dead_router_check_interval' must be set if 'check_routers_before_use' is set\n"); - return -EINVAL; - } - - rc = LNetEQAlloc(0, lnet_router_checker_event, &the_lnet.ln_rc_eqh); - if (rc) { - CERROR("Can't allocate EQ(0): %d\n", rc); - return -ENOMEM; - } - - return 0; -} - void lnet_router_post_mt_start(void) { if (check_routers_before_use) { @@ -933,19 +712,6 @@ void lnet_router_post_mt_start(void) } } -void lnet_router_cleanup(void) -{ - int rc; - - rc = LNetEQFree(the_lnet.ln_rc_eqh); - LASSERT(rc == 0); -} - -void lnet_prune_rc_data(int wait_unlink) -{ - wait_unlink = wait_unlink; -} - /* * This function is called from the monitor thread to check if there are * any active routers that need to be checked. @@ -962,11 +728,6 @@ bool lnet_router_checker_active(void) if (the_lnet.ln_routing) return true; - /* if there are routers that need to be cleaned up then do so */ - if (!list_empty(&the_lnet.ln_rcd_deathrow) || - !list_empty(&the_lnet.ln_rcd_zombie)) - return true; - return !list_empty(&the_lnet.ln_routers) && (live_router_check_interval > 0 || dead_router_check_interval > 0); @@ -997,8 +758,6 @@ bool lnet_router_checker_active(void) lnet_update_ni_status_locked(); lnet_net_unlock(cpt); - - lnet_prune_rc_data(0); /* don't wait for UNLINK */ } void @@ -1503,20 +1262,6 @@ bool lnet_router_checker_active(void) lnet_net_lock(cpt); } - /* - * We can't fully trust LND on reporting exact peer last_alive - * if he notifies us about dead peer. For example ksocklnd can - * call us with when == _time_when_the_node_was_booted_ if - * no connections were successfully established - */ - if (ni && !alive && when < lp->lpni_last_alive) - when = lp->lpni_last_alive; - - lnet_notify_locked(lp, !ni, alive, when); - - if (ni) - lnet_ni_notify_locked(ni, lp); - lnet_peer_ni_decref_locked(lp); lnet_net_unlock(cpt); diff --git a/net/lnet/lnet/router_proc.c b/net/lnet/lnet/router_proc.c index 3120533..e494d19 100644 --- a/net/lnet/lnet/router_proc.c +++ b/net/lnet/lnet/router_proc.c @@ -215,7 +215,6 @@ static int proc_lnet_routes(struct ctl_table *table, int write, u32 net = rnet->lrn_net; u32 hops = route->lr_hops; unsigned int priority = route->lr_priority; - lnet_nid_t nid = route->lr_gateway->lp_primary_nid; int alive = lnet_is_route_alive(route); s += snprintf(s, tmpstr + tmpsiz - s, @@ -223,7 +222,8 @@ static int proc_lnet_routes(struct ctl_table *table, int write, libcfs_net2str(net), hops, priority, alive ? "up" : "down", - libcfs_nid2str(nid)); + /* TODO: replace with actual nid */ + libcfs_nid2str(LNET_NID_ANY)); LASSERT(tmpstr + tmpsiz - s > 0); } @@ -278,10 +278,8 @@ static int proc_lnet_routers(struct ctl_table *table, int write, if (!*ppos) { s += snprintf(s, tmpstr + tmpsiz - s, - "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n", - "ref", "rtr_ref", "alive_cnt", "state", - "last_ping", "ping_sent", "deadline", - "down_ni", "router"); + "%-4s %7s %5s %s\n", + "ref", "rtr_ref", "alive", "router"); LASSERT(tmpstr + tmpsiz - s > 0); lnet_net_lock(0); @@ -319,48 +317,15 @@ static int proc_lnet_routers(struct ctl_table *table, int write, if (peer) { lnet_nid_t nid = peer->lp_primary_nid; - time64_t now = ktime_get_seconds(); - /* TODO: readjust what's being printed */ - time64_t deadline = 0; int nrefs = atomic_read(&peer->lp_refcount); int nrtrrefs = peer->lp_rtr_refcount; - int alive_cnt = 0; int alive = lnet_is_gateway_alive(peer); - int pingsent = ((peer->lp_state & LNET_PEER_PING_SENT) - != 0); - time64_t last_ping = now - peer->lp_rtrcheck_timestamp; - int down_ni = 0; - struct lnet_route *rtr; - - if (nrtrrefs > 0) { - list_for_each_entry(rtr, &peer->lp_routes, - lr_gwlist) { - /* - * downis on any route should be the - * number of downis on the gateway - */ - if (rtr->lr_downis) { - down_ni = rtr->lr_downis; - break; - } - } - } - if (!deadline) - s += snprintf(s, tmpstr + tmpsiz - s, - "%-4d %7d %9d %6s %12llu %9d %8s %7d %s\n", - nrefs, nrtrrefs, alive_cnt, - alive ? "up" : "down", last_ping, - pingsent, "NA", down_ni, - libcfs_nid2str(nid)); - else - s += snprintf(s, tmpstr + tmpsiz - s, - "%-4d %7d %9d %6s %12llu %9d %8llu %7d %s\n", - nrefs, nrtrrefs, alive_cnt, - alive ? "up" : "down", last_ping, - pingsent, deadline - now, - down_ni, libcfs_nid2str(nid)); - LASSERT(tmpstr + tmpsiz - s > 0); + s += snprintf(s, tmpstr + tmpsiz - s, + "%-4d %7d %5s %s\n", + nrefs, nrtrrefs, + alive ? "up" : "down", + libcfs_nid2str(nid)); } lnet_net_unlock(0); @@ -532,19 +497,6 @@ static int proc_lnet_peers(struct ctl_table *table, int write, aliveness = lnet_is_peer_ni_alive(peer) ? "up" : "down"; - if (lnet_peer_aliveness_enabled(peer)) { - time64_t now = ktime_get_seconds(); - - lastalive = now - peer->lpni_last_alive; - - /* No need to mess up peers contents with - * arbitrarily long integers - it suffices to - * know that lastalive is more than 10000s old - */ - if (lastalive >= 10000) - lastalive = 9999; - } - lnet_net_unlock(cpt); s += snprintf(s, tmpstr + tmpsiz - s, -- 1.8.3.1