X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Flacp.c;h=e1d365d377e3406b2ea729d32ca809c9b27ae79b;hb=e0edde6fee279cdbbf3c179f5f50adaf0c7c7f1e;hp=ee796772475b037c7d3b7cb7b663383a8842ad88;hpb=0f1a47f108ba6c599b252bc1b17ea59609d60e09;p=sliver-openvswitch.git diff --git a/lib/lacp.c b/lib/lacp.c index ee7967724..e1d365d37 100644 --- a/lib/lacp.c +++ b/lib/lacp.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2011 Nicira Networks +/* Copyright (c) 2011 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -25,6 +25,7 @@ #include "ofpbuf.h" #include "packets.h" #include "poll-loop.h" +#include "shash.h" #include "timer.h" #include "timeval.h" #include "unixctl.h" @@ -32,6 +33,55 @@ VLOG_DEFINE_THIS_MODULE(lacp); +/* Masks for lacp_info state member. */ +#define LACP_STATE_ACT 0x01 /* Activity. Active or passive? */ +#define LACP_STATE_TIME 0x02 /* Timeout. Short or long timeout? */ +#define LACP_STATE_AGG 0x04 /* Aggregation. Is the link is bondable? */ +#define LACP_STATE_SYNC 0x08 /* Synchronization. Is the link in up to date? */ +#define LACP_STATE_COL 0x10 /* Collecting. Is the link receiving frames? */ +#define LACP_STATE_DIST 0x20 /* Distributing. Is the link sending frames? */ +#define LACP_STATE_DEF 0x40 /* Defaulted. Using default partner info? */ +#define LACP_STATE_EXP 0x80 /* Expired. Using expired partner info? */ + +#define LACP_FAST_TIME_TX 1000 /* Fast transmission rate. */ +#define LACP_SLOW_TIME_TX 30000 /* Slow transmission rate. */ +#define LACP_RX_MULTIPLIER 3 /* Multiply by TX rate to get RX rate. */ + +#define LACP_INFO_LEN 15 +struct lacp_info { + ovs_be16 sys_priority; /* System priority. */ + uint8_t sys_id[ETH_ADDR_LEN]; /* System ID. */ + ovs_be16 key; /* Operational key. */ + ovs_be16 port_priority; /* Port priority. */ + ovs_be16 port_id; /* Port ID. */ + uint8_t state; /* State mask. See LACP_STATE macros. */ +} __attribute__((packed)); +BUILD_ASSERT_DECL(LACP_INFO_LEN == sizeof(struct lacp_info)); + +#define LACP_PDU_LEN 110 +struct lacp_pdu { + uint8_t subtype; /* Always 1. */ + uint8_t version; /* Always 1. */ + + uint8_t actor_type; /* Always 1. */ + uint8_t actor_len; /* Always 20. */ + struct lacp_info actor; /* LACP actor information. */ + uint8_t z1[3]; /* Reserved. Always 0. */ + + uint8_t partner_type; /* Always 2. */ + uint8_t partner_len; /* Always 20. */ + struct lacp_info partner; /* LACP partner information. */ + uint8_t z2[3]; /* Reserved. Always 0. */ + + uint8_t collector_type; /* Always 3. */ + uint8_t collector_len; /* Always 16. */ + ovs_be16 collector_delay; /* Maximum collector delay. Set to UINT16_MAX. */ + uint8_t z3[64]; /* Combination of several fields. Always 0. */ +} __attribute__((packed)); +BUILD_ASSERT_DECL(LACP_PDU_LEN == sizeof(struct lacp_pdu)); + +/* Implementation. */ + enum slave_status { LACP_CURRENT, /* Current State. Partner up to date. */ LACP_EXPIRED, /* Expired State. Partner out of date. */ @@ -48,7 +98,7 @@ struct lacp { struct hmap slaves; /* Slaves this LACP object controls. */ struct slave *key_slave; /* Slave whose ID will be the aggregation key. */ - bool fast; /* Fast or Slow LACP time. */ + bool fast; /* True if using fast probe interval. */ bool negotiated; /* True if LACP negotiations were successful. */ bool update; /* True if lacp_update() needs to be called. */ }; @@ -60,6 +110,7 @@ struct slave { struct lacp *lacp; /* LACP object containing this slave. */ uint16_t port_id; /* Port ID. */ uint16_t port_priority; /* Port Priority. */ + uint16_t key; /* Aggregation Key. 0 if default. */ char *name; /* Name of this slave. */ enum slave_status status; /* Slave status. */ @@ -83,14 +134,59 @@ static bool slave_may_tx(const struct slave *); static struct slave *slave_lookup(const struct lacp *, const void *slave); static bool info_tx_equal(struct lacp_info *, struct lacp_info *); -static void lacp_unixctl_show(struct unixctl_conn *, const char *args, - void *aux); +static unixctl_cb_func lacp_unixctl_show; + +/* Populates 'pdu' with a LACP PDU comprised of 'actor' and 'partner'. */ +static void +compose_lacp_pdu(const struct lacp_info *actor, + const struct lacp_info *partner, struct lacp_pdu *pdu) +{ + memset(pdu, 0, sizeof *pdu); + + pdu->subtype = 1; + pdu->version = 1; + + pdu->actor_type = 1; + pdu->actor_len = 20; + pdu->actor = *actor; + + pdu->partner_type = 2; + pdu->partner_len = 20; + pdu->partner = *partner; + + pdu->collector_type = 3; + pdu->collector_len = 16; + pdu->collector_delay = htons(0); +} + +/* Parses 'b' which represents a packet containing a LACP PDU. This function + * returns NULL if 'b' is malformed, or does not represent a LACP PDU format + * supported by OVS. Otherwise, it returns a pointer to the lacp_pdu contained + * within 'b'. */ +static const struct lacp_pdu * +parse_lacp_packet(const struct ofpbuf *b) +{ + const struct lacp_pdu *pdu; + + pdu = ofpbuf_at(b, (uint8_t *)b->l3 - (uint8_t *)b->data, LACP_PDU_LEN); + + if (pdu && pdu->subtype == 1 + && pdu->actor_type == 1 && pdu->actor_len == 20 + && pdu->partner_type == 2 && pdu->partner_len == 20) { + return pdu; + } else { + return NULL; + } +} + +/* LACP Protocol Implementation. */ /* Initializes the lacp module. */ void lacp_init(void) { - unixctl_command_register("lacp/show", lacp_unixctl_show, NULL); + unixctl_command_register("lacp/show", "[port]", 0, 1, + lacp_unixctl_show, NULL); } /* Creates a LACP object. */ @@ -127,13 +223,20 @@ lacp_destroy(struct lacp *lacp) void lacp_configure(struct lacp *lacp, const struct lacp_settings *s) { + assert(!eth_addr_is_zero(s->id)); + if (!lacp->name || strcmp(s->name, lacp->name)) { free(lacp->name); lacp->name = xstrdup(s->name); } - memcpy(lacp->sys_id, s->id, ETH_ADDR_LEN); - lacp->sys_priority = s->priority; + if (!eth_addr_equals(lacp->sys_id, s->id) + || lacp->sys_priority != s->priority) { + memcpy(lacp->sys_id, s->id, ETH_ADDR_LEN); + lacp->sys_priority = s->priority; + lacp->update = true; + } + lacp->active = s->active; lacp->fast = s->fast; } @@ -146,19 +249,27 @@ lacp_is_active(const struct lacp *lacp) return lacp->active; } -/* Processes 'pdu', a parsed LACP packet received on 'slave_'. This function - * should be called on all packets received on 'slave_' with Ethernet Type - * ETH_TYPE_LACP and parsable by parse_lacp_packet(). */ +/* Processes 'packet' which was received on 'slave_'. This function should be + * called on all packets received on 'slave_' with Ethernet Type ETH_TYPE_LACP. + */ void -lacp_process_pdu(struct lacp *lacp, const void *slave_, - const struct lacp_pdu *pdu) +lacp_process_packet(struct lacp *lacp, const void *slave_, + const struct ofpbuf *packet) { + static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); struct slave *slave = slave_lookup(lacp, slave_); + const struct lacp_pdu *pdu; + long long int tx_rate; + + pdu = parse_lacp_packet(packet); + if (!pdu) { + VLOG_WARN_RL(&rl, "%s: received an unparsable LACP PDU.", lacp->name); + return; + } slave->status = LACP_CURRENT; - timer_set_duration(&slave->rx, (lacp->fast - ? LACP_FAST_TIME_RX - : LACP_SLOW_TIME_RX)); + tx_rate = lacp->fast ? LACP_FAST_TIME_TX : LACP_SLOW_TIME_TX; + timer_set_duration(&slave->rx, LACP_RX_MULTIPLIER * tx_rate); slave->ntt_actor = pdu->partner; @@ -171,12 +282,17 @@ lacp_process_pdu(struct lacp *lacp, const void *slave_, } } -/* Returns true if 'lacp' has successfully negotiated with its partner. False - * if 'lacp' is NULL. */ -bool -lacp_negotiated(const struct lacp *lacp) +/* Returns the lacp_status of the given 'lacp' object (which may be NULL). */ +enum lacp_status +lacp_status(const struct lacp *lacp) { - return lacp ? lacp->negotiated : false; + if (!lacp) { + return LACP_DISABLED; + } else if (lacp->negotiated) { + return LACP_NEGOTIATED; + } else { + return LACP_CONFIGURED; + } } /* Registers 'slave_' as subordinate to 'lacp'. This should be called at least @@ -205,9 +321,12 @@ lacp_slave_register(struct lacp *lacp, void *slave_, slave->name = xstrdup(s->name); } - if (slave->port_id != s->id || slave->port_priority != s->priority) { + if (slave->port_id != s->id + || slave->port_priority != s->priority + || slave->key != s->key) { slave->port_id = s->id; slave->port_priority = s->priority; + slave->key = s->key; lacp->update = true; @@ -225,18 +344,21 @@ lacp_slave_unregister(struct lacp *lacp, const void *slave_) if (slave) { slave_destroy(slave); + lacp->update = true; } } /* This function should be called whenever the carrier status of 'slave_' has - * changed. */ + * changed. If 'lacp' is null, this function has no effect.*/ void lacp_slave_carrier_changed(const struct lacp *lacp, const void *slave_) { - struct slave *slave = slave_lookup(lacp, slave_); + if (lacp) { + struct slave *slave = slave_lookup(lacp, slave_); - if (slave->status == LACP_CURRENT || slave->lacp->active) { - slave_set_expired(slave); + if (slave->status == LACP_CURRENT || slave->lacp->active) { + slave_set_expired(slave); + } } } @@ -250,12 +372,8 @@ lacp_slave_may_enable(const struct lacp *lacp, const void *slave_) struct slave *slave = slave_lookup(lacp, slave_); /* The slave may be enabled if it's attached to an aggregator and its - * partner is synchronized. The only exception is defaulted slaves. - * They are not required to have synchronized partners because they - * have no partners at all. They will only be attached if negotiations - * failed on all slaves in the bond. */ - return slave->attached && (slave->partner.state & LACP_STATE_SYNC - || slave->status == LACP_DEFAULTED); + * partner is synchronized.*/ + return slave->attached && (slave->partner.state & LACP_STATE_SYNC); } else { return true; } @@ -269,6 +387,15 @@ lacp_slave_get_port_id(const struct lacp *lacp, const void *slave_) return slave->port_id; } +/* Returns true if partner information on 'slave_' is up to date. 'slave_' + * not being current, generally indicates a connectivity problem, or a + * misconfigured (or broken) partner. */ +bool +lacp_slave_is_current(const struct lacp *lacp, const void *slave_) +{ + return slave_lookup(lacp, slave_)->status != LACP_DEFAULTED; +} + /* This function should be called periodically to update 'lacp'. */ void lacp_run(struct lacp *lacp, lacp_send_pdu *send_pdu) @@ -290,7 +417,6 @@ lacp_run(struct lacp *lacp, lacp_send_pdu *send_pdu) } HMAP_FOR_EACH (slave, node, &lacp->slaves) { - struct lacp_pdu pdu; struct lacp_info actor; if (!slave_may_tx(slave)) { @@ -301,15 +427,18 @@ lacp_run(struct lacp *lacp, lacp_send_pdu *send_pdu) if (timer_expired(&slave->tx) || !info_tx_equal(&actor, &slave->ntt_actor)) { + long long int duration; + struct lacp_pdu pdu; slave->ntt_actor = actor; compose_lacp_pdu(&actor, &slave->partner, &pdu); - send_pdu(slave->aux, &pdu); + send_pdu(slave->aux, &pdu, sizeof pdu); + + duration = (slave->partner.state & LACP_STATE_TIME + ? LACP_FAST_TIME_TX + : LACP_SLOW_TIME_TX); - timer_set_duration(&slave->tx, - (slave->partner.state & LACP_STATE_TIME - ? LACP_FAST_TIME_TX - : LACP_SLOW_TIME_TX)); + timer_set_duration(&slave->tx, duration); } } } @@ -333,7 +462,7 @@ lacp_wait(struct lacp *lacp) /* Static Helpers. */ -/* Updates the attached status of all slaves controlled b 'lacp' and sets its +/* Updates the attached status of all slaves controlled by 'lacp' and sets its * negotiated parameter to true if any slaves are attachable. */ static void lacp_update_attached(struct lacp *lacp) @@ -348,14 +477,13 @@ lacp_update_attached(struct lacp *lacp) HMAP_FOR_EACH (slave, node, &lacp->slaves) { struct lacp_info pri; - slave->attached = true; + slave->attached = false; /* XXX: In the future allow users to configure the expected system ID. * For now just special case loopback. */ if (eth_addr_equals(slave->partner.sys_id, slave->lacp->sys_id)) { VLOG_WARN_RL(&rl, "slave %s: Loopback detected. Slave is " "connected to its own bond", slave->name); - slave->attached = false; continue; } @@ -363,6 +491,7 @@ lacp_update_attached(struct lacp *lacp) continue; } + slave->attached = true; slave_get_priority(slave, &pri); if (!lead || memcmp(&pri, &lead_pri, sizeof pri) < 0) { @@ -375,8 +504,7 @@ lacp_update_attached(struct lacp *lacp) if (lead) { HMAP_FOR_EACH (slave, node, &lacp->slaves) { - if (slave->status == LACP_DEFAULTED - || lead->partner.key != slave->partner.key + if (lead->partner.key != slave->partner.key || !eth_addr_equals(lead->partner.sys_id, slave->partner.sys_id)) { slave->attached = false; @@ -424,19 +552,22 @@ slave_set_expired(struct slave *slave) slave->status = LACP_EXPIRED; slave->partner.state |= LACP_STATE_TIME; slave->partner.state &= ~LACP_STATE_SYNC; - timer_set_duration(&slave->rx, LACP_FAST_TIME_RX); + + timer_set_duration(&slave->rx, LACP_RX_MULTIPLIER * LACP_FAST_TIME_TX); } static void slave_get_actor(struct slave *slave, struct lacp_info *actor) { + struct lacp *lacp = slave->lacp; + uint16_t key; uint8_t state = 0; - if (slave->lacp->active) { + if (lacp->active) { state |= LACP_STATE_ACT; } - if (slave->lacp->fast) { + if (lacp->fast) { state |= LACP_STATE_TIME; } @@ -452,20 +583,25 @@ slave_get_actor(struct slave *slave, struct lacp_info *actor) state |= LACP_STATE_EXP; } - if (hmap_count(&slave->lacp->slaves) > 1) { + if (hmap_count(&lacp->slaves) > 1) { state |= LACP_STATE_AGG; } - if (slave->attached || !slave->lacp->negotiated) { + if (slave->attached || !lacp->negotiated) { state |= LACP_STATE_COL | LACP_STATE_DIST; } + key = lacp->key_slave->key; + if (!key) { + key = lacp->key_slave->port_id; + } + actor->state = state; - actor->key = htons(slave->lacp->key_slave->port_id); + actor->key = htons(key); actor->port_priority = htons(slave->port_priority); actor->port_id = htons(slave->port_id); - actor->sys_priority = htons(slave->lacp->sys_priority); - memcpy(&actor->sys_id, slave->lacp->sys_id, ETH_ADDR_LEN); + actor->sys_priority = htons(lacp->sys_priority); + memcpy(&actor->sys_id, lacp->sys_id, ETH_ADDR_LEN); } /* Given 'slave', populates 'priority' with data representing its LACP link @@ -558,70 +694,81 @@ static void ds_put_lacp_state(struct ds *ds, uint8_t state) { if (state & LACP_STATE_ACT) { - ds_put_cstr(ds, "activity "); + ds_put_cstr(ds, " activity"); } if (state & LACP_STATE_TIME) { - ds_put_cstr(ds, "timeout "); + ds_put_cstr(ds, " timeout"); } if (state & LACP_STATE_AGG) { - ds_put_cstr(ds, "aggregation "); + ds_put_cstr(ds, " aggregation"); } if (state & LACP_STATE_SYNC) { - ds_put_cstr(ds, "synchronized "); + ds_put_cstr(ds, " synchronized"); } if (state & LACP_STATE_COL) { - ds_put_cstr(ds, "collecting "); + ds_put_cstr(ds, " collecting"); } if (state & LACP_STATE_DIST) { - ds_put_cstr(ds, "distributing "); + ds_put_cstr(ds, " distributing"); } if (state & LACP_STATE_DEF) { - ds_put_cstr(ds, "defaulted "); + ds_put_cstr(ds, " defaulted"); } if (state & LACP_STATE_EXP) { - ds_put_cstr(ds, "expired "); + ds_put_cstr(ds, " expired"); } } static void -lacp_unixctl_show(struct unixctl_conn *conn, - const char *args, void *aux OVS_UNUSED) +lacp_print_details(struct ds *ds, struct lacp *lacp) { - struct ds ds = DS_EMPTY_INITIALIZER; - struct lacp *lacp; + struct shash slave_shash = SHASH_INITIALIZER(&slave_shash); + const struct shash_node **sorted_slaves = NULL; + struct slave *slave; + int i; - lacp = lacp_find(args); - if (!lacp) { - unixctl_command_reply(conn, 501, "no such lacp object"); - return; + ds_put_format(ds, "---- %s ----\n", lacp->name); + ds_put_format(ds, "\tstatus: %s", lacp->active ? "active" : "passive"); + if (lacp->negotiated) { + ds_put_cstr(ds, " negotiated"); } + ds_put_cstr(ds, "\n"); - ds_put_format(&ds, "lacp: %s\n", lacp->name); - ds_put_format(&ds, "\tstatus: %s %s\n", - lacp->active ? "active" : "passive", - lacp->negotiated ? "negotiated" : ""); - ds_put_format(&ds, "\tsys_id: " ETH_ADDR_FMT "\n", ETH_ADDR_ARGS(lacp->sys_id)); - ds_put_format(&ds, "\tsys_priority: %u\n", lacp->sys_priority); - ds_put_cstr(&ds, "\taggregation key: "); + ds_put_format(ds, "\tsys_id: " ETH_ADDR_FMT "\n", ETH_ADDR_ARGS(lacp->sys_id)); + ds_put_format(ds, "\tsys_priority: %u\n", lacp->sys_priority); + ds_put_cstr(ds, "\taggregation key: "); if (lacp->key_slave) { - ds_put_format(&ds, "%u", lacp->key_slave->port_id); + ds_put_format(ds, "%u", lacp->key_slave->port_id); } else { - ds_put_cstr(&ds, "none"); + ds_put_cstr(ds, "none"); + } + ds_put_cstr(ds, "\n"); + + ds_put_cstr(ds, "\tlacp_time: "); + if (lacp->fast) { + ds_put_cstr(ds, "fast\n"); + } else { + ds_put_cstr(ds, "slow\n"); } - ds_put_cstr(&ds, "\n"); HMAP_FOR_EACH (slave, node, &lacp->slaves) { + shash_add(&slave_shash, slave->name, slave); + } + sorted_slaves = shash_sort(&slave_shash); + + for (i = 0; i < shash_count(&slave_shash); i++) { char *status; struct lacp_info actor; + slave = sorted_slaves[i]->data; slave_get_actor(slave, &actor); switch (slave->status) { case LACP_CURRENT: @@ -637,40 +784,64 @@ lacp_unixctl_show(struct unixctl_conn *conn, NOT_REACHED(); } - ds_put_format(&ds, "\nslave: %s: %s %s\n", slave->name, status, + ds_put_format(ds, "\nslave: %s: %s %s\n", slave->name, status, slave->attached ? "attached" : "detached"); - ds_put_format(&ds, "\tport_id: %u\n", slave->port_id); - ds_put_format(&ds, "\tport_priority: %u\n", slave->port_priority); + ds_put_format(ds, "\tport_id: %u\n", slave->port_id); + ds_put_format(ds, "\tport_priority: %u\n", slave->port_priority); - ds_put_format(&ds, "\n\tactor sys_id: " ETH_ADDR_FMT "\n", + ds_put_format(ds, "\n\tactor sys_id: " ETH_ADDR_FMT "\n", ETH_ADDR_ARGS(actor.sys_id)); - ds_put_format(&ds, "\tactor sys_priority: %u\n", + ds_put_format(ds, "\tactor sys_priority: %u\n", ntohs(actor.sys_priority)); - ds_put_format(&ds, "\tactor port_id: %u\n", + ds_put_format(ds, "\tactor port_id: %u\n", ntohs(actor.port_id)); - ds_put_format(&ds, "\tactor port_priority: %u\n", + ds_put_format(ds, "\tactor port_priority: %u\n", ntohs(actor.port_priority)); - ds_put_format(&ds, "\tactor key: %u\n", + ds_put_format(ds, "\tactor key: %u\n", ntohs(actor.key)); - ds_put_cstr(&ds, "\tactor state: "); - ds_put_lacp_state(&ds, actor.state); - ds_put_cstr(&ds, "\n\n"); + ds_put_cstr(ds, "\tactor state:"); + ds_put_lacp_state(ds, actor.state); + ds_put_cstr(ds, "\n\n"); - ds_put_format(&ds, "\tpartner sys_id: " ETH_ADDR_FMT "\n", + ds_put_format(ds, "\tpartner sys_id: " ETH_ADDR_FMT "\n", ETH_ADDR_ARGS(slave->partner.sys_id)); - ds_put_format(&ds, "\tpartner sys_priority: %u\n", + ds_put_format(ds, "\tpartner sys_priority: %u\n", ntohs(slave->partner.sys_priority)); - ds_put_format(&ds, "\tpartner port_id: %u\n", + ds_put_format(ds, "\tpartner port_id: %u\n", ntohs(slave->partner.port_id)); - ds_put_format(&ds, "\tpartner port_priority: %u\n", + ds_put_format(ds, "\tpartner port_priority: %u\n", ntohs(slave->partner.port_priority)); - ds_put_format(&ds, "\tpartner key: %u\n", + ds_put_format(ds, "\tpartner key: %u\n", ntohs(slave->partner.key)); - ds_put_cstr(&ds, "\tpartner state: "); - ds_put_lacp_state(&ds, slave->partner.state); - ds_put_cstr(&ds, "\n"); + ds_put_cstr(ds, "\tpartner state:"); + ds_put_lacp_state(ds, slave->partner.state); + ds_put_cstr(ds, "\n"); + } + + shash_destroy(&slave_shash); + free(sorted_slaves); +} + +static void +lacp_unixctl_show(struct unixctl_conn *conn, int argc, const char *argv[], + void *aux OVS_UNUSED) +{ + struct ds ds = DS_EMPTY_INITIALIZER; + struct lacp *lacp; + + if (argc > 1) { + lacp = lacp_find(argv[1]); + if (!lacp) { + unixctl_command_reply_error(conn, "no such lacp object"); + return; + } + lacp_print_details(&ds, lacp); + } else { + LIST_FOR_EACH (lacp, node, &all_lacps) { + lacp_print_details(&ds, lacp); + } } - unixctl_command_reply(conn, 200, ds_cstr(&ds)); + unixctl_command_reply(conn, ds_cstr(&ds)); ds_destroy(&ds); }