From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Simmons Date: Thu, 27 Feb 2020 16:13:37 -0500 Subject: [lustre-devel] [PATCH 349/622] lnet: drop all rule In-Reply-To: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> References: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> Message-ID: <1582838290-17243-350-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 Add a rule to drop all messages arriving on a specific interface. This is useful for simulating failures on a specific router interface. WC-bug-id: https://jira.whamcloud.com/browse/LU-11470 Lustre-commit: deb31c2ffad5 ("LU-11470 lnet: drop all rule") Signed-off-by: Amir Shehata Reviewed-on: https://review.whamcloud.com/33305 Reviewed-by: Olaf Weber Signed-off-by: James Simmons --- include/linux/lnet/lib-lnet.h | 3 ++- include/uapi/linux/lnet/lnetctl.h | 6 ++++++ net/lnet/lnet/lib-move.c | 2 +- net/lnet/lnet/lib-msg.c | 7 +++++-- net/lnet/lnet/net_fault.c | 28 +++++++++++++++++++++------- 5 files changed, 35 insertions(+), 11 deletions(-) diff --git a/include/linux/lnet/lib-lnet.h b/include/linux/lnet/lib-lnet.h index 5a83e3a..4dee7a9 100644 --- a/include/linux/lnet/lib-lnet.h +++ b/include/linux/lnet/lib-lnet.h @@ -663,7 +663,8 @@ void lnet_drop_message(struct lnet_ni *ni, int cpt, void *private, int lnet_fault_init(void); void lnet_fault_fini(void); -bool lnet_drop_rule_match(struct lnet_hdr *hdr, enum lnet_msg_hstatus *hstatus); +bool lnet_drop_rule_match(struct lnet_hdr *hdr, lnet_nid_t local_nid, + enum lnet_msg_hstatus *hstatus); int lnet_delay_rule_add(struct lnet_fault_attr *attr); int lnet_delay_rule_del(lnet_nid_t src, lnet_nid_t dst, bool shutdown); diff --git a/include/uapi/linux/lnet/lnetctl.h b/include/uapi/linux/lnet/lnetctl.h index 2eb9c82..bd08b4f 100644 --- a/include/uapi/linux/lnet/lnetctl.h +++ b/include/uapi/linux/lnet/lnetctl.h @@ -64,6 +64,10 @@ struct lnet_fault_attr { lnet_nid_t fa_src; /** destination NID of drop rule, see @dr_src for details */ lnet_nid_t fa_dst; + /** local NID. In case of router this is the NID we're ceiving + * messages on + */ + lnet_nid_t fa_local_nid; /** * Portal mask to drop, -1 means all portals, for example: * fa_ptl_mask = (1 << _LDLM_CB_REQUEST_PORTAL ) | @@ -95,6 +99,8 @@ struct lnet_fault_attr { __u32 da_health_error_mask; /** randomize error generation */ bool da_random; + /** drop all messages if flag is set */ + bool da_drop_all; } drop; /** message latency simulation */ struct { diff --git a/net/lnet/lnet/lib-move.c b/net/lnet/lnet/lib-move.c index 90b4e3f..fff9fea 100644 --- a/net/lnet/lnet/lib-move.c +++ b/net/lnet/lnet/lib-move.c @@ -3964,7 +3964,7 @@ void lnet_monitor_thr_stop(void) } if (!list_empty(&the_lnet.ln_drop_rules) && - lnet_drop_rule_match(hdr, NULL)) { + lnet_drop_rule_match(hdr, ni->ni_nid, NULL)) { CDEBUG(D_NET, "%s, src %s, dst %s: Dropping %s to simulate silent message loss\n", libcfs_nid2str(from_nid), libcfs_nid2str(src_nid), libcfs_nid2str(dest_nid), lnet_msgtyp2str(type)); diff --git a/net/lnet/lnet/lib-msg.c b/net/lnet/lnet/lib-msg.c index 2cbaff8a..8876866 100644 --- a/net/lnet/lnet/lib-msg.c +++ b/net/lnet/lnet/lib-msg.c @@ -900,11 +900,14 @@ return false; /* match only health rules */ - if (!lnet_drop_rule_match(&msg->msg_hdr, hstatus)) + if (!lnet_drop_rule_match(&msg->msg_hdr, LNET_NID_ANY, + hstatus)) return false; - CDEBUG(D_NET, "src %s, dst %s: %s simulate health error: %s\n", + CDEBUG(D_NET, + "src %s(%s)->dst %s: %s simulate health error: %s\n", libcfs_nid2str(msg->msg_hdr.src_nid), + libcfs_nid2str(msg->msg_txni->ni_nid), libcfs_nid2str(msg->msg_hdr.dest_nid), lnet_msgtyp2str(msg->msg_type), lnet_health_error2str(*hstatus)); diff --git a/net/lnet/lnet/net_fault.c b/net/lnet/lnet/net_fault.c index becb709..9f78e43 100644 --- a/net/lnet/lnet/net_fault.c +++ b/net/lnet/lnet/net_fault.c @@ -79,10 +79,12 @@ struct lnet_drop_rule { static bool lnet_fault_attr_match(struct lnet_fault_attr *attr, lnet_nid_t src, - lnet_nid_t dst, unsigned int type, unsigned int portal) + lnet_nid_t local_nid, lnet_nid_t dst, + unsigned int type, unsigned int portal) { if (!lnet_fault_nid_match(attr->fa_src, src) || - !lnet_fault_nid_match(attr->fa_dst, dst)) + !lnet_fault_nid_match(attr->fa_dst, dst) || + !lnet_fault_nid_match(attr->fa_local_nid, local_nid)) return false; if (!(attr->fa_msg_mask & (1 << type))) @@ -340,15 +342,22 @@ struct lnet_drop_rule { */ static bool drop_rule_match(struct lnet_drop_rule *rule, lnet_nid_t src, - lnet_nid_t dst, unsigned int type, unsigned int portal, + lnet_nid_t local_nid, lnet_nid_t dst, + unsigned int type, unsigned int portal, enum lnet_msg_hstatus *hstatus) { struct lnet_fault_attr *attr = &rule->dr_attr; bool drop; - if (!lnet_fault_attr_match(attr, src, dst, type, portal)) + if (!lnet_fault_attr_match(attr, src, local_nid, dst, type, portal)) return false; + if (attr->u.drop.da_drop_all) { + CDEBUG(D_NET, "set to drop all messages\n"); + drop = true; + goto drop_matched; + } + /* if we're trying to match a health status error but it hasn't * been set in the rule, then don't match */ @@ -396,6 +405,8 @@ struct lnet_drop_rule { } } +drop_matched: + if (drop) { /* drop this message, update counters */ if (hstatus) lnet_fault_match_health(hstatus, @@ -412,7 +423,9 @@ struct lnet_drop_rule { * Check if message from @src to @dst can match any existed drop rule */ bool -lnet_drop_rule_match(struct lnet_hdr *hdr, enum lnet_msg_hstatus *hstatus) +lnet_drop_rule_match(struct lnet_hdr *hdr, + lnet_nid_t local_nid, + enum lnet_msg_hstatus *hstatus) { lnet_nid_t src = le64_to_cpu(hdr->src_nid); lnet_nid_t dst = le64_to_cpu(hdr->dest_nid); @@ -433,7 +446,7 @@ struct lnet_drop_rule { cpt = lnet_net_lock_current(); list_for_each_entry(rule, &the_lnet.ln_drop_rules, dr_link) { - drop = drop_rule_match(rule, src, dst, typ, ptl, + drop = drop_rule_match(rule, src, local_nid, dst, typ, ptl, hstatus); if (drop) break; @@ -524,7 +537,8 @@ struct delay_daemon_data { struct lnet_fault_attr *attr = &rule->dl_attr; bool delay; - if (!lnet_fault_attr_match(attr, src, dst, type, portal)) + if (!lnet_fault_attr_match(attr, src, LNET_NID_ANY, + dst, type, portal)) return false; /* match this rule, check delay rate now */ -- 1.8.3.1