X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fcfm.c;h=c3d96d8a0b45557049c0c20ce8921bc80894b6e4;hb=f137ed099e3feaa4a9d8c5dc5f5234945451795e;hp=b4f64c71957feb9f633259275fec355a32a71893;hpb=ef9819b5f131ae3c727309a7f3758fa079679c85;p=openvswitch diff --git a/lib/cfm.c b/lib/cfm.c index b4f64c71..c3d96d8a 100644 --- a/lib/cfm.c +++ b/lib/cfm.c @@ -22,6 +22,7 @@ #include #include +#include "byte-order.h" #include "dynamic-string.h" #include "flow.h" #include "hash.h" @@ -61,7 +62,11 @@ struct ccm { ovs_be32 seq; ovs_be16 mpid; uint8_t maid[CCM_MAID_LEN]; - uint8_t zero[16]; /* Defined by ITU-T Y.1731 should be zero */ + + /* Defined by ITU-T Y.1731 should be zero */ + ovs_be16 interval_ms_x; /* Transmission interval in ms. */ + ovs_be64 mpid64; /* MPID in extended mode. */ + uint8_t zero[6]; } __attribute__((packed)); BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm)); @@ -69,7 +74,7 @@ struct cfm { char *name; /* Name of this CFM object. */ struct hmap_node hmap_node; /* Node in all_cfms list. */ - uint16_t mpid; + uint64_t mpid; bool extended; /* Extended mode. */ bool fault; /* Indicates connectivity fault. */ bool unexpected_recv; /* Received an unexpected CCM. */ @@ -83,12 +88,17 @@ struct cfm { struct timer fault_timer; /* Check for faults when expired. */ struct hmap remote_mps; /* Remote MPs. */ + + /* Result of cfm_get_remote_mpids(). Updated only during fault check to + * avoid flapping. */ + uint64_t *rmps_array; /* Cache of remote_mps. */ + size_t rmps_array_len; /* Number of rmps in 'rmps_array'. */ }; /* Remote MPs represent foreign network entities that are configured to have * the same MAID as this CFM instance. */ struct remote_mp { - uint16_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */ + uint64_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */ struct hmap_node node; /* Node in 'remote_mps' map. */ bool recv; /* CCM was received since last fault check. */ @@ -180,20 +190,21 @@ ms_to_ccm_interval(int interval_ms) } static uint32_t -hash_mpid(uint8_t mpid) +hash_mpid(uint64_t mpid) { - return hash_int(mpid, 0); + return hash_bytes(&mpid, sizeof mpid, 0); } static bool -cfm_is_valid_mpid(uint32_t mpid) +cfm_is_valid_mpid(bool extended, uint64_t mpid) { - /* 802.1ag specification requires MPIDs to be within the range [1, 8191] */ - return mpid >= 1 && mpid <= 8191; + /* 802.1ag specification requires MPIDs to be within the range [1, 8191]. + * In extended mode we relax this requirement. */ + return mpid >= 1 && (extended || mpid <= 8191); } static struct remote_mp * -lookup_remote_mp(const struct cfm *cfm, uint16_t mpid) +lookup_remote_mp(const struct cfm *cfm, uint64_t mpid) { struct remote_mp *rmp; @@ -243,6 +254,7 @@ cfm_destroy(struct cfm *cfm) hmap_destroy(&cfm->remote_mps); hmap_remove(&all_cfms, &cfm->hmap_node); + free(cfm->rmps_array); free(cfm->name); free(cfm); } @@ -258,10 +270,15 @@ cfm_run(struct cfm *cfm) cfm->fault = cfm->unexpected_recv; cfm->unexpected_recv = false; + cfm->rmps_array_len = 0; + free(cfm->rmps_array); + cfm->rmps_array = xmalloc(hmap_count(&cfm->remote_mps) * + sizeof *cfm->rmps_array); + HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) { if (!rmp->recv) { - VLOG_DBG("%s: No CCM from RMP %"PRIu16" in the last %lldms", + VLOG_DBG("%s: no CCM from RMP %"PRIu64" in the last %lldms", cfm->name, rmp->mpid, interval); hmap_remove(&cfm->remote_mps, &rmp->node); free(rmp); @@ -269,16 +286,18 @@ cfm_run(struct cfm *cfm) rmp->recv = false; if (rmp->mpid == cfm->mpid) { - VLOG_WARN_RL(&rl, "%s: Received CCM with local MPID (%d)", - cfm->name, rmp->mpid); + VLOG_WARN_RL(&rl,"%s: received CCM with local MPID" + " %"PRIu64, cfm->name, rmp->mpid); cfm->fault = true; } if (rmp->rdi) { - VLOG_DBG("%s: RDI bit flagged from RMP %"PRIu16, cfm->name, + VLOG_DBG("%s: RDI bit flagged from RMP %"PRIu64, cfm->name, rmp->mpid); cfm->fault = true; } + + cfm->rmps_array[cfm->rmps_array_len++] = rmp->mpid; } } @@ -313,11 +332,23 @@ cfm_compose_ccm(struct cfm *cfm, struct ofpbuf *packet, ccm->opcode = CCM_OPCODE; ccm->tlv_offset = 70; ccm->seq = htonl(++cfm->seq); - ccm->mpid = htons(cfm->mpid); ccm->flags = cfm->ccm_interval; memcpy(ccm->maid, cfm->maid, sizeof ccm->maid); memset(ccm->zero, 0, sizeof ccm->zero); + if (cfm->extended) { + ccm->mpid = htons(hash_mpid(cfm->mpid)); + ccm->mpid64 = htonll(cfm->mpid); + } else { + ccm->mpid = htons(cfm->mpid); + ccm->mpid64 = htonll(0); + } + + if (cfm->ccm_interval == 0) { + assert(cfm->extended); + ccm->interval_ms_x = htons(cfm->ccm_interval_ms); + } + if (hmap_is_empty(&cfm->remote_mps)) { ccm->flags |= CCM_RDI_MASK; } @@ -326,7 +357,6 @@ cfm_compose_ccm(struct cfm *cfm, struct ofpbuf *packet, void cfm_wait(struct cfm *cfm) { - timer_wait(&cfm->tx_timer); timer_wait(&cfm->fault_timer); } @@ -336,18 +366,25 @@ bool cfm_configure(struct cfm *cfm, const struct cfm_settings *s) { uint8_t interval; + int interval_ms; - if (!cfm_is_valid_mpid(s->mpid) || s->interval <= 0) { + if (!cfm_is_valid_mpid(s->extended, s->mpid) || s->interval <= 0) { return false; } cfm->mpid = s->mpid; cfm->extended = s->extended; interval = ms_to_ccm_interval(s->interval); + interval_ms = ccm_interval_to_ms(interval); - if (interval != cfm->ccm_interval) { + if (cfm->extended && interval_ms != s->interval) { + interval = 0; + interval_ms = MIN(s->interval, UINT16_MAX); + } + + if (interval != cfm->ccm_interval || interval_ms != cfm->ccm_interval_ms) { cfm->ccm_interval = interval; - cfm->ccm_interval_ms = ccm_interval_to_ms(interval); + cfm->ccm_interval_ms = interval_ms; timer_set_expired(&cfm->tx_timer); timer_set_duration(&cfm->fault_timer, cfm_fault_interval(cfm)); @@ -371,10 +408,6 @@ void cfm_process_heartbeat(struct cfm *cfm, const struct ofpbuf *p) { struct ccm *ccm; - bool ccm_rdi; - uint16_t ccm_mpid; - uint8_t ccm_interval; - struct remote_mp *rmp; struct eth_header *eth; eth = p->l2; @@ -406,16 +439,28 @@ cfm_process_heartbeat(struct cfm *cfm, const struct ofpbuf *p) VLOG_WARN_RL(&rl, "%s: Received unexpected remote MAID from MAC " ETH_ADDR_FMT, cfm->name, ETH_ADDR_ARGS(eth->eth_src)); } else { - ccm_mpid = ntohs(ccm->mpid); - ccm_interval = ccm->flags & 0x7; - ccm_rdi = ccm->flags & CCM_RDI_MASK; + uint8_t ccm_interval = ccm->flags & 0x7; + bool ccm_rdi = ccm->flags & CCM_RDI_MASK; + uint16_t ccm_interval_ms_x = ntohs(ccm->interval_ms_x); + + struct remote_mp *rmp; + uint64_t ccm_mpid; + + ccm_mpid = cfm->extended ? ntohll(ccm->mpid64) : ntohs(ccm->mpid); if (ccm_interval != cfm->ccm_interval) { VLOG_WARN_RL(&rl, "%s: received a CCM with an invalid interval" - " (%"PRIu8") from RMP %"PRIu16, cfm->name, + " (%"PRIu8") from RMP %"PRIu64, cfm->name, ccm_interval, ccm_mpid); } + if (cfm->extended && ccm_interval == 0 + && ccm_interval_ms_x != cfm->ccm_interval_ms) { + VLOG_WARN_RL(&rl, "%s: received a CCM with an invalid extended" + " interval (%"PRIu16"ms) from RMP %"PRIu64, cfm->name, + ccm_interval_ms_x, ccm_mpid); + } + rmp = lookup_remote_mp(cfm, ccm_mpid); if (rmp) { rmp->recv = true; @@ -428,12 +473,12 @@ cfm_process_heartbeat(struct cfm *cfm, const struct ofpbuf *p) hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(rmp->mpid)); } else { cfm->unexpected_recv = true; - VLOG_WARN_RL(&rl, "%s: dropped CCM with MPID %d from MAC " + VLOG_WARN_RL(&rl, "%s: dropped CCM with MPID %"PRIu64" from MAC " ETH_ADDR_FMT, cfm->name, ccm_mpid, ETH_ADDR_ARGS(eth->eth_src)); } - VLOG_DBG("%s: Received CCM (seq %"PRIu32") (mpid %"PRIu16")" + VLOG_DBG("%s: received CCM (seq %"PRIu32") (mpid %"PRIu64")" " (interval %"PRIu8") (RDI %s)", cfm->name, ntohl(ccm->seq), ccm_mpid, ccm_interval, ccm_rdi ? "true" : "false"); } @@ -447,6 +492,17 @@ cfm_get_fault(const struct cfm *cfm) return cfm->fault; } +/* Populates 'rmps' with an array of remote maintenance points reachable by + * 'cfm'. The number of remote maintenance points is written to 'n_rmps'. + * 'cfm' retains ownership of the array written to 'rmps' */ +void +cfm_get_remote_mpids(const struct cfm *cfm, const uint64_t **rmps, + size_t *n_rmps) +{ + *rmps = cfm->rmps_array; + *n_rmps = cfm->rmps_array_len; +} + static struct cfm * cfm_find(const char *name) { @@ -474,7 +530,7 @@ cfm_unixctl_show(struct unixctl_conn *conn, return; } - ds_put_format(&ds, "MPID %"PRIu16":%s%s\n", cfm->mpid, + ds_put_format(&ds, "MPID %"PRIu64":%s%s\n", cfm->mpid, cfm->fault ? " fault" : "", cfm->unexpected_recv ? " unexpected_recv" : ""); @@ -486,7 +542,8 @@ cfm_unixctl_show(struct unixctl_conn *conn, ds_put_cstr(&ds, "\n"); HMAP_FOR_EACH (rmp, node, &cfm->remote_mps) { - ds_put_format(&ds, "Remote MPID %"PRIu16":%s\n", rmp->mpid, + ds_put_format(&ds, "Remote MPID %"PRIu64":%s\n", + rmp->mpid, rmp->rdi ? " rdi" : ""); ds_put_format(&ds, "\trecv since check: %s", rmp->recv ? "true" : "false");