From: Liang Zhen <liang.z...@intel.com> A couple of changes to improve aliveness detection: - When LNet received a message, it can determine peer of this message is alive
- When LNet received a message from remote network, it can determine router is alive and NI status on router is UP. Signed-off-by: Liang Zhen <liang.z...@intel.com> Reviewed-on: http://review.whamcloud.com/12453 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5485 Reviewed-by: James Simmons <uja.o...@gmail.com> Reviewed-by: Isaac Huang <he.hu...@intel.com> Signed-off-by: Oleg Drokin <oleg.dro...@intel.com> --- drivers/staging/lustre/include/linux/lnet/lib-lnet.h | 10 ++++++++++ drivers/staging/lustre/lnet/lnet/lib-move.c | 13 +++++++++++++ drivers/staging/lustre/lnet/lnet/router.c | 17 ++++++++++++++++- 3 files changed, 39 insertions(+), 1 deletion(-) diff --git a/drivers/staging/lustre/include/linux/lnet/lib-lnet.h b/drivers/staging/lustre/include/linux/lnet/lib-lnet.h index 99fb52a..0038d29 100644 --- a/drivers/staging/lustre/include/linux/lnet/lib-lnet.h +++ b/drivers/staging/lustre/include/linux/lnet/lib-lnet.h @@ -636,6 +636,7 @@ lnet_net2rnethash(__u32 net) } extern lnd_t the_lolnd; +extern int avoid_asym_router_failure; int lnet_cpt_of_nid_locked(lnet_nid_t nid); int lnet_cpt_of_nid(lnet_nid_t nid); @@ -851,6 +852,7 @@ int lnet_peer_buffer_credits(lnet_ni_t *ni); int lnet_router_checker_start(void); void lnet_router_checker_stop(void); +void lnet_router_ni_update_locked(lnet_peer_t *gw, __u32 net); void lnet_swap_pinginfo(lnet_ping_info_t *info); int lnet_ping_target_init(void); @@ -870,4 +872,12 @@ void lnet_peer_tables_destroy(void); int lnet_peer_tables_create(void); void lnet_debug_peer(lnet_nid_t nid); +static inline void lnet_peer_set_alive(lnet_peer_t *lp) +{ + lp->lp_last_alive = lp->lp_last_query = get_seconds(); + if (!lp->lp_alive) + lnet_notify_locked(lp, 0, 1, lp->lp_last_alive); +} + + #endif diff --git a/drivers/staging/lustre/lnet/lnet/lib-move.c b/drivers/staging/lustre/lnet/lnet/lib-move.c index ed6eec9..0f53c76 100644 --- a/drivers/staging/lustre/lnet/lnet/lib-move.c +++ b/drivers/staging/lustre/lnet/lnet/lib-move.c @@ -1877,6 +1877,19 @@ lnet_parse(lnet_ni_t *ni, lnet_hdr_t *hdr, lnet_nid_t from_nid, goto drop; } + if (lnet_isrouter(msg->msg_rxpeer)) { + lnet_peer_set_alive(msg->msg_rxpeer); + if (avoid_asym_router_failure && + LNET_NIDNET(src_nid) != LNET_NIDNET(from_nid)) { + /* received a remote message from router, update + * remote NI status on this router. + * NB: multi-hop routed message will be ignored. + */ + lnet_router_ni_update_locked(msg->msg_rxpeer, + LNET_NIDNET(src_nid)); + } + } + lnet_msg_commit(msg, cpt); if (!for_me) { diff --git a/drivers/staging/lustre/lnet/lnet/router.c b/drivers/staging/lustre/lnet/lnet/router.c index 1bbaa5b..52ec0ab 100644 --- a/drivers/staging/lustre/lnet/lnet/router.c +++ b/drivers/staging/lustre/lnet/lnet/router.c @@ -84,7 +84,7 @@ static int check_routers_before_use; module_param(check_routers_before_use, int, 0444); MODULE_PARM_DESC(check_routers_before_use, "Assume routers are down and ping them before use"); -static int avoid_asym_router_failure = 1; +int avoid_asym_router_failure = 1; module_param(avoid_asym_router_failure, int, 0644); MODULE_PARM_DESC(avoid_asym_router_failure, "Avoid asymmetrical router failures (0 to disable)"); @@ -783,6 +783,21 @@ lnet_wait_known_routerstate(void) } } +void +lnet_router_ni_update_locked(lnet_peer_t *gw, __u32 net) +{ + lnet_route_t *rte; + + if ((gw->lp_ping_feats & LNET_PING_FEAT_NI_STATUS) != 0) { + list_for_each_entry(rte, &gw->lp_routes, lr_gwlist) { + if (rte->lr_net == net) { + rte->lr_downis = 0; + break; + } + } + } +} + static void lnet_update_ni_status_locked(void) { -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
