/* Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include "bridge.h" #include "byte-order.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bitmap.h" #include "bond.h" #include "cfm.h" #include "classifier.h" #include "coverage.h" #include "daemon.h" #include "dirs.h" #include "dpif.h" #include "dynamic-string.h" #include "flow.h" #include "hash.h" #include "hmap.h" #include "jsonrpc.h" #include "lacp.h" #include "list.h" #include "mac-learning.h" #include "netdev.h" #include "netlink.h" #include "odp-util.h" #include "ofp-print.h" #include "ofpbuf.h" #include "ofproto/netflow.h" #include "ofproto/ofproto.h" #include "ovsdb-data.h" #include "packets.h" #include "poll-loop.h" #include "process.h" #include "sha1.h" #include "shash.h" #include "socket-util.h" #include "stream-ssl.h" #include "sset.h" #include "svec.h" #include "system-stats.h" #include "timeval.h" #include "util.h" #include "unixctl.h" #include "vconn.h" #include "vswitchd/vswitch-idl.h" #include "xenserver.h" #include "vlog.h" #include "sflow_api.h" VLOG_DEFINE_THIS_MODULE(bridge); COVERAGE_DEFINE(bridge_flush); COVERAGE_DEFINE(bridge_process_flow); COVERAGE_DEFINE(bridge_reconfigure); struct dst { struct iface *iface; uint16_t vlan; }; struct dst_set { struct dst builtin[32]; struct dst *dsts; size_t n, allocated; }; static void dst_set_init(struct dst_set *); static void dst_set_add(struct dst_set *, const struct dst *); static void dst_set_free(struct dst_set *); struct iface { /* These members are always valid. */ struct list port_elem; /* Element in struct port's "ifaces" list. */ struct port *port; /* Containing port. */ char *name; /* Host network device name. */ tag_type tag; /* Tag associated with this interface. */ /* These members are valid only after bridge_reconfigure() causes them to * be initialized. */ struct hmap_node dp_ifidx_node; /* In struct bridge's "ifaces" hmap. */ int dp_ifidx; /* Index within kernel datapath. */ struct netdev *netdev; /* Network device. */ const char *type; /* Usually same as cfg->type. */ const struct ovsrec_interface *cfg; }; #define MAX_MIRRORS 32 typedef uint32_t mirror_mask_t; #define MIRROR_MASK_C(X) UINT32_C(X) BUILD_ASSERT_DECL(sizeof(mirror_mask_t) * CHAR_BIT >= MAX_MIRRORS); struct mirror { struct bridge *bridge; size_t idx; char *name; struct uuid uuid; /* UUID of this "mirror" record in database. */ /* Selection criteria. */ struct sset src_ports; /* Source port names. */ struct sset dst_ports; /* Destination port names. */ int *vlans; size_t n_vlans; /* Output. */ struct port *out_port; int out_vlan; }; #define FLOOD_PORT ((struct port *) 1) /* The 'flood' output port. */ struct port { struct bridge *bridge; struct hmap_node hmap_node; /* Element in struct bridge's "ports" hmap. */ char *name; int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */ unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1. * NULL if all VLANs are trunked. */ const struct ovsrec_port *cfg; /* An ordinary bridge port has 1 interface. * A bridge port for bonding has at least 2 interfaces. */ struct list ifaces; /* List of "struct iface"s. */ struct lacp *lacp; /* NULL if LACP is not enabled. */ /* Bonding info. */ struct bond *bond; /* Port mirroring info. */ mirror_mask_t src_mirrors; /* Mirrors triggered when packet received. */ mirror_mask_t dst_mirrors; /* Mirrors triggered when packet sent. */ bool is_mirror_output_port; /* Does port mirroring send frames here? */ }; struct bridge { struct list node; /* Node in global list of bridges. */ char *name; /* User-specified arbitrary name. */ struct mac_learning *ml; /* MAC learning table. */ uint8_t ea[ETH_ADDR_LEN]; /* Bridge Ethernet Address. */ uint8_t default_ea[ETH_ADDR_LEN]; /* Default MAC. */ const struct ovsrec_bridge *cfg; /* OpenFlow switch processing. */ struct ofproto *ofproto; /* OpenFlow switch. */ /* Kernel datapath information. */ struct dpif *dpif; /* Datapath. */ struct hmap ifaces; /* "struct iface"s indexed by dp_ifidx. */ /* Bridge ports. */ struct hmap ports; /* "struct port"s indexed by name. */ struct shash iface_by_name; /* "struct iface"s indexed by name. */ /* Bonding. */ bool has_bonded_ports; /* Flow tracking. */ bool flush; /* Port mirroring. */ struct mirror *mirrors[MAX_MIRRORS]; /* Synthetic local port if necessary. */ struct ovsrec_port synth_local_port; struct ovsrec_interface synth_local_iface; struct ovsrec_interface *synth_local_ifacep; }; /* List of all bridges. */ static struct list all_bridges = LIST_INITIALIZER(&all_bridges); /* OVSDB IDL used to obtain configuration. */ static struct ovsdb_idl *idl; /* Each time this timer expires, the bridge fetches systems and interface * statistics and pushes them into the database. */ #define STATS_INTERVAL (5 * 1000) /* In milliseconds. */ static long long int stats_timer = LLONG_MIN; /* Stores the time after which rate limited statistics may be written to the * database. Only updated when changes to the database require rate limiting. */ #define DB_LIMIT_INTERVAL (1 * 1000) /* In milliseconds. */ static long long int db_limiter = LLONG_MIN; static struct bridge *bridge_create(const struct ovsrec_bridge *br_cfg); static void bridge_destroy(struct bridge *); static struct bridge *bridge_lookup(const char *name); static unixctl_cb_func bridge_unixctl_dump_flows; static unixctl_cb_func bridge_unixctl_reconnect; static int bridge_run_one(struct bridge *); static size_t bridge_get_controllers(const struct bridge *br, struct ovsrec_controller ***controllersp); static void bridge_reconfigure_one(struct bridge *); static void bridge_reconfigure_remotes(struct bridge *, const struct sockaddr_in *managers, size_t n_managers); static void bridge_get_all_ifaces(const struct bridge *, struct shash *ifaces); static void bridge_fetch_dp_ifaces(struct bridge *); static void bridge_flush(struct bridge *); static void bridge_pick_local_hw_addr(struct bridge *, uint8_t ea[ETH_ADDR_LEN], struct iface **hw_addr_iface); static uint64_t bridge_pick_datapath_id(struct bridge *, const uint8_t bridge_ea[ETH_ADDR_LEN], struct iface *hw_addr_iface); static uint64_t dpid_from_hash(const void *, size_t nbytes); static unixctl_cb_func bridge_unixctl_fdb_show; static unixctl_cb_func cfm_unixctl_show; static unixctl_cb_func qos_unixctl_show; static void port_run(struct port *); static void port_wait(struct port *); static struct port *port_create(struct bridge *, const char *name); static void port_reconfigure(struct port *, const struct ovsrec_port *); static void port_del_ifaces(struct port *, const struct ovsrec_port *); static void port_destroy(struct port *); static struct port *port_lookup(const struct bridge *, const char *name); static struct iface *port_get_an_iface(const struct port *); static struct port *port_from_dp_ifidx(const struct bridge *, uint16_t dp_ifidx); static void port_reconfigure_lacp(struct port *); static void port_reconfigure_bond(struct port *); static void port_send_learning_packets(struct port *); static void mirror_create(struct bridge *, struct ovsrec_mirror *); static void mirror_destroy(struct mirror *); static void mirror_reconfigure(struct bridge *); static void mirror_reconfigure_one(struct mirror *, struct ovsrec_mirror *); static bool vlan_is_mirrored(const struct mirror *, int vlan); static struct iface *iface_create(struct port *port, const struct ovsrec_interface *if_cfg); static void iface_destroy(struct iface *); static struct iface *iface_lookup(const struct bridge *, const char *name); static struct iface *iface_find(const char *name); static struct iface *iface_from_dp_ifidx(const struct bridge *, uint16_t dp_ifidx); static void iface_set_mac(struct iface *); static void iface_set_ofport(const struct ovsrec_interface *, int64_t ofport); static void iface_update_qos(struct iface *, const struct ovsrec_qos *); static void iface_update_cfm(struct iface *); static bool iface_refresh_cfm_stats(struct iface *iface); static bool iface_get_carrier(const struct iface *); static bool iface_is_synthetic(const struct iface *); static void shash_from_ovs_idl_map(char **keys, char **values, size_t n, struct shash *); static void shash_to_ovs_idl_map(struct shash *, char ***keys, char ***values, size_t *n); /* Hooks into ofproto processing. */ static struct ofhooks bridge_ofhooks; /* Public functions. */ /* Initializes the bridge module, configuring it to obtain its configuration * from an OVSDB server accessed over 'remote', which should be a string in a * form acceptable to ovsdb_idl_create(). */ void bridge_init(const char *remote) { /* Create connection to database. */ idl = ovsdb_idl_create(remote, &ovsrec_idl_class, true); ovsdb_idl_omit_alert(idl, &ovsrec_open_vswitch_col_cur_cfg); ovsdb_idl_omit_alert(idl, &ovsrec_open_vswitch_col_statistics); ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_ovs_version); ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_db_version); ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_system_type); ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_system_version); ovsdb_idl_omit_alert(idl, &ovsrec_bridge_col_datapath_id); ovsdb_idl_omit(idl, &ovsrec_bridge_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_port_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_port_col_fake_bridge); ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_admin_state); ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_duplex); ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_link_speed); ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_link_state); ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_mtu); ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_ofport); ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_statistics); ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_status); ovsdb_idl_omit(idl, &ovsrec_interface_col_external_ids); ovsdb_idl_omit_alert(idl, &ovsrec_controller_col_is_connected); ovsdb_idl_omit_alert(idl, &ovsrec_controller_col_role); ovsdb_idl_omit_alert(idl, &ovsrec_controller_col_status); ovsdb_idl_omit(idl, &ovsrec_controller_col_external_ids); ovsdb_idl_omit_alert(idl, &ovsrec_maintenance_point_col_fault); ovsdb_idl_omit_alert(idl, &ovsrec_monitor_col_fault); ovsdb_idl_omit(idl, &ovsrec_qos_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_queue_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_mirror_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_netflow_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_sflow_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_manager_col_external_ids); ovsdb_idl_omit(idl, &ovsrec_manager_col_inactivity_probe); ovsdb_idl_omit(idl, &ovsrec_manager_col_is_connected); ovsdb_idl_omit(idl, &ovsrec_manager_col_max_backoff); ovsdb_idl_omit(idl, &ovsrec_manager_col_status); ovsdb_idl_omit(idl, &ovsrec_ssl_col_external_ids); /* Register unixctl commands. */ unixctl_command_register("fdb/show", bridge_unixctl_fdb_show, NULL); unixctl_command_register("cfm/show", cfm_unixctl_show, NULL); unixctl_command_register("qos/show", qos_unixctl_show, NULL); unixctl_command_register("bridge/dump-flows", bridge_unixctl_dump_flows, NULL); unixctl_command_register("bridge/reconnect", bridge_unixctl_reconnect, NULL); lacp_init(); bond_init(); } void bridge_exit(void) { struct bridge *br, *next_br; LIST_FOR_EACH_SAFE (br, next_br, node, &all_bridges) { bridge_destroy(br); } ovsdb_idl_destroy(idl); } /* Performs configuration that is only necessary once at ovs-vswitchd startup, * but for which the ovs-vswitchd configuration 'cfg' is required. */ static void bridge_configure_once(const struct ovsrec_open_vswitch *cfg) { static bool already_configured_once; struct sset bridge_names; struct sset dpif_names, dpif_types; const char *type; size_t i; /* Only do this once per ovs-vswitchd run. */ if (already_configured_once) { return; } already_configured_once = true; stats_timer = time_msec() + STATS_INTERVAL; /* Get all the configured bridges' names from 'cfg' into 'bridge_names'. */ sset_init(&bridge_names); for (i = 0; i < cfg->n_bridges; i++) { sset_add(&bridge_names, cfg->bridges[i]->name); } /* Iterate over all system dpifs and delete any of them that do not appear * in 'cfg'. */ sset_init(&dpif_names); sset_init(&dpif_types); dp_enumerate_types(&dpif_types); SSET_FOR_EACH (type, &dpif_types) { const char *name; dp_enumerate_names(type, &dpif_names); /* Delete each dpif whose name is not in 'bridge_names'. */ SSET_FOR_EACH (name, &dpif_names) { if (!sset_contains(&bridge_names, name)) { struct dpif *dpif; int retval; retval = dpif_open(name, type, &dpif); if (!retval) { dpif_delete(dpif); dpif_close(dpif); } } } } sset_destroy(&bridge_names); sset_destroy(&dpif_names); sset_destroy(&dpif_types); } /* Callback for iterate_and_prune_ifaces(). */ static bool check_iface(struct bridge *br, struct iface *iface, void *aux OVS_UNUSED) { if (!iface->netdev) { /* We already reported a related error, don't bother duplicating it. */ return false; } if (iface->dp_ifidx < 0) { VLOG_ERR("%s interface not in %s, dropping", iface->name, dpif_name(br->dpif)); return false; } VLOG_DBG("%s has interface %s on port %d", dpif_name(br->dpif), iface->name, iface->dp_ifidx); return true; } /* Callback for iterate_and_prune_ifaces(). */ static bool set_iface_properties(struct bridge *br OVS_UNUSED, struct iface *iface, void *aux OVS_UNUSED) { /* Set policing attributes. */ netdev_set_policing(iface->netdev, iface->cfg->ingress_policing_rate, iface->cfg->ingress_policing_burst); /* Set MAC address of internal interfaces other than the local * interface. */ iface_set_mac(iface); return true; } /* Calls 'cb' for each interfaces in 'br', passing along the 'aux' argument. * Deletes from 'br' all the interfaces for which 'cb' returns false, and then * deletes from 'br' any ports that no longer have any interfaces. */ static void iterate_and_prune_ifaces(struct bridge *br, bool (*cb)(struct bridge *, struct iface *, void *aux), void *aux) { struct port *port, *next_port; HMAP_FOR_EACH_SAFE (port, next_port, hmap_node, &br->ports) { struct iface *iface, *next_iface; LIST_FOR_EACH_SAFE (iface, next_iface, port_elem, &port->ifaces) { if (!cb(br, iface, aux)) { iface_set_ofport(iface->cfg, -1); iface_destroy(iface); } } if (list_is_empty(&port->ifaces)) { VLOG_WARN("%s port has no interfaces, dropping", port->name); port_destroy(port); } } } /* Looks at the list of managers in 'ovs_cfg' and extracts their remote IP * addresses and ports into '*managersp' and '*n_managersp'. The caller is * responsible for freeing '*managersp' (with free()). * * You may be asking yourself "why does ovs-vswitchd care?", because * ovsdb-server is responsible for connecting to the managers, and ovs-vswitchd * should not be and in fact is not directly involved in that. But * ovs-vswitchd needs to make sure that ovsdb-server can reach the managers, so * it has to tell in-band control where the managers are to enable that. * (Thus, only managers connected in-band are collected.) */ static void collect_in_band_managers(const struct ovsrec_open_vswitch *ovs_cfg, struct sockaddr_in **managersp, size_t *n_managersp) { struct sockaddr_in *managers = NULL; size_t n_managers = 0; struct sset targets; size_t i; /* Collect all of the potential targets from the "targets" columns of the * rows pointed to by "manager_options", excluding any that are * out-of-band. */ sset_init(&targets); for (i = 0; i < ovs_cfg->n_manager_options; i++) { struct ovsrec_manager *m = ovs_cfg->manager_options[i]; if (m->connection_mode && !strcmp(m->connection_mode, "out-of-band")) { sset_find_and_delete(&targets, m->target); } else { sset_add(&targets, m->target); } } /* Now extract the targets' IP addresses. */ if (!sset_is_empty(&targets)) { const char *target; managers = xmalloc(sset_count(&targets) * sizeof *managers); SSET_FOR_EACH (target, &targets) { struct sockaddr_in *sin = &managers[n_managers]; if ((!strncmp(target, "tcp:", 4) && inet_parse_active(target + 4, JSONRPC_TCP_PORT, sin)) || (!strncmp(target, "ssl:", 4) && inet_parse_active(target + 4, JSONRPC_SSL_PORT, sin))) { n_managers++; } } } sset_destroy(&targets); *managersp = managers; *n_managersp = n_managers; } static void bridge_reconfigure(const struct ovsrec_open_vswitch *ovs_cfg) { struct shash old_br, new_br; struct shash_node *node; struct bridge *br, *next; struct sockaddr_in *managers; size_t n_managers; size_t i; int sflow_bridge_number; COVERAGE_INC(bridge_reconfigure); collect_in_band_managers(ovs_cfg, &managers, &n_managers); /* Collect old and new bridges. */ shash_init(&old_br); shash_init(&new_br); LIST_FOR_EACH (br, node, &all_bridges) { shash_add(&old_br, br->name, br); } for (i = 0; i < ovs_cfg->n_bridges; i++) { const struct ovsrec_bridge *br_cfg = ovs_cfg->bridges[i]; if (!shash_add_once(&new_br, br_cfg->name, br_cfg)) { VLOG_WARN("more than one bridge named %s", br_cfg->name); } } /* Get rid of deleted bridges and add new bridges. */ LIST_FOR_EACH_SAFE (br, next, node, &all_bridges) { struct ovsrec_bridge *br_cfg = shash_find_data(&new_br, br->name); if (br_cfg) { br->cfg = br_cfg; } else { bridge_destroy(br); } } SHASH_FOR_EACH (node, &new_br) { const char *br_name = node->name; const struct ovsrec_bridge *br_cfg = node->data; br = shash_find_data(&old_br, br_name); if (br) { /* If the bridge datapath type has changed, we need to tear it * down and recreate. */ if (strcmp(br->cfg->datapath_type, br_cfg->datapath_type)) { bridge_destroy(br); bridge_create(br_cfg); } } else { bridge_create(br_cfg); } } shash_destroy(&old_br); shash_destroy(&new_br); /* Reconfigure all bridges. */ LIST_FOR_EACH (br, node, &all_bridges) { bridge_reconfigure_one(br); } /* Add and delete ports on all datapaths. * * The kernel will reject any attempt to add a given port to a datapath if * that port already belongs to a different datapath, so we must do all * port deletions before any port additions. */ LIST_FOR_EACH (br, node, &all_bridges) { struct dpif_port_dump dump; struct shash want_ifaces; struct dpif_port dpif_port; bridge_get_all_ifaces(br, &want_ifaces); DPIF_PORT_FOR_EACH (&dpif_port, &dump, br->dpif) { if (!shash_find(&want_ifaces, dpif_port.name) && strcmp(dpif_port.name, br->name)) { int retval = dpif_port_del(br->dpif, dpif_port.port_no); if (retval) { VLOG_WARN("failed to remove %s interface from %s: %s", dpif_port.name, dpif_name(br->dpif), strerror(retval)); } } } shash_destroy(&want_ifaces); } LIST_FOR_EACH (br, node, &all_bridges) { struct shash cur_ifaces, want_ifaces; struct dpif_port_dump dump; struct dpif_port dpif_port; /* Get the set of interfaces currently in this datapath. */ shash_init(&cur_ifaces); DPIF_PORT_FOR_EACH (&dpif_port, &dump, br->dpif) { struct dpif_port *port_info = xmalloc(sizeof *port_info); dpif_port_clone(port_info, &dpif_port); shash_add(&cur_ifaces, dpif_port.name, port_info); } /* Get the set of interfaces we want on this datapath. */ bridge_get_all_ifaces(br, &want_ifaces); hmap_clear(&br->ifaces); SHASH_FOR_EACH (node, &want_ifaces) { const char *if_name = node->name; struct iface *iface = node->data; struct dpif_port *dpif_port; const char *type; int error; type = iface ? iface->type : "internal"; dpif_port = shash_find_data(&cur_ifaces, if_name); /* If we have a port or a netdev already, and it's not the type we * want, then delete the port (if any) and close the netdev (if * any). */ if ((dpif_port && strcmp(dpif_port->type, type)) || (iface && iface->netdev && strcmp(type, netdev_get_type(iface->netdev)))) { if (dpif_port) { error = ofproto_port_del(br->ofproto, dpif_port->port_no); if (error) { continue; } dpif_port = NULL; } if (iface) { if (iface->port->bond) { /* The bond has a pointer to the netdev, so remove it * from the bond before closing the netdev. The slave * will get added back to the bond later, after a new * netdev is available. */ bond_slave_unregister(iface->port->bond, iface); } netdev_close(iface->netdev); iface->netdev = NULL; } } /* If the port doesn't exist or we don't have the netdev open, * we need to do more work. */ if (!dpif_port || (iface && !iface->netdev)) { struct netdev_options options; struct netdev *netdev; struct shash args; /* First open the network device. */ options.name = if_name; options.type = type; options.args = &args; options.ethertype = NETDEV_ETH_TYPE_NONE; shash_init(&args); if (iface) { shash_from_ovs_idl_map(iface->cfg->key_options, iface->cfg->value_options, iface->cfg->n_options, &args); } error = netdev_open(&options, &netdev); shash_destroy(&args); if (error) { VLOG_WARN("could not open network device %s (%s)", if_name, strerror(error)); continue; } /* Then add the port if we haven't already. */ if (!dpif_port) { error = dpif_port_add(br->dpif, netdev, NULL); if (error) { netdev_close(netdev); if (error == EFBIG) { VLOG_ERR("ran out of valid port numbers on %s", dpif_name(br->dpif)); break; } else { VLOG_WARN("failed to add %s interface to %s: %s", if_name, dpif_name(br->dpif), strerror(error)); continue; } } } /* Update 'iface'. */ if (iface) { iface->netdev = netdev; } } else if (iface && iface->netdev) { struct shash args; shash_init(&args); shash_from_ovs_idl_map(iface->cfg->key_options, iface->cfg->value_options, iface->cfg->n_options, &args); netdev_set_config(iface->netdev, &args); shash_destroy(&args); } } shash_destroy(&want_ifaces); SHASH_FOR_EACH (node, &cur_ifaces) { struct dpif_port *port_info = node->data; dpif_port_destroy(port_info); free(port_info); } shash_destroy(&cur_ifaces); } sflow_bridge_number = 0; LIST_FOR_EACH (br, node, &all_bridges) { uint8_t ea[ETH_ADDR_LEN]; uint64_t dpid; struct iface *local_iface; struct iface *hw_addr_iface; char *dpid_string; bridge_fetch_dp_ifaces(br); /* Delete interfaces that cannot be opened. * * From this point forward we are guaranteed that every "struct iface" * has nonnull 'netdev' and correct 'dp_ifidx'. */ iterate_and_prune_ifaces(br, check_iface, NULL); /* Pick local port hardware address, datapath ID. */ bridge_pick_local_hw_addr(br, ea, &hw_addr_iface); local_iface = iface_from_dp_ifidx(br, ODPP_LOCAL); if (local_iface) { int error = netdev_set_etheraddr(local_iface->netdev, ea); if (error) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_ERR_RL(&rl, "bridge %s: failed to set bridge " "Ethernet address: %s", br->name, strerror(error)); } } memcpy(br->ea, ea, ETH_ADDR_LEN); dpid = bridge_pick_datapath_id(br, ea, hw_addr_iface); ofproto_set_datapath_id(br->ofproto, dpid); dpid_string = xasprintf("%016"PRIx64, dpid); ovsrec_bridge_set_datapath_id(br->cfg, dpid_string); free(dpid_string); /* Set NetFlow configuration on this bridge. */ if (br->cfg->netflow) { struct ovsrec_netflow *nf_cfg = br->cfg->netflow; struct netflow_options opts; memset(&opts, 0, sizeof opts); dpif_get_netflow_ids(br->dpif, &opts.engine_type, &opts.engine_id); if (nf_cfg->engine_type) { opts.engine_type = *nf_cfg->engine_type; } if (nf_cfg->engine_id) { opts.engine_id = *nf_cfg->engine_id; } opts.active_timeout = nf_cfg->active_timeout; if (!opts.active_timeout) { opts.active_timeout = -1; } else if (opts.active_timeout < 0) { VLOG_WARN("bridge %s: active timeout interval set to negative " "value, using default instead (%d seconds)", br->name, NF_ACTIVE_TIMEOUT_DEFAULT); opts.active_timeout = -1; } opts.add_id_to_iface = nf_cfg->add_id_to_interface; if (opts.add_id_to_iface) { if (opts.engine_id > 0x7f) { VLOG_WARN("bridge %s: netflow port mangling may conflict " "with another vswitch, choose an engine id less " "than 128", br->name); } if (hmap_count(&br->ports) > 508) { VLOG_WARN("bridge %s: netflow port mangling will conflict " "with another port when more than 508 ports are " "used", br->name); } } sset_init(&opts.collectors); sset_add_array(&opts.collectors, nf_cfg->targets, nf_cfg->n_targets); if (ofproto_set_netflow(br->ofproto, &opts)) { VLOG_ERR("bridge %s: problem setting netflow collectors", br->name); } sset_destroy(&opts.collectors); } else { ofproto_set_netflow(br->ofproto, NULL); } /* Set sFlow configuration on this bridge. */ if (br->cfg->sflow) { const struct ovsrec_sflow *sflow_cfg = br->cfg->sflow; struct ovsrec_controller **controllers; struct ofproto_sflow_options oso; size_t n_controllers; memset(&oso, 0, sizeof oso); sset_init(&oso.targets); sset_add_array(&oso.targets, sflow_cfg->targets, sflow_cfg->n_targets); oso.sampling_rate = SFL_DEFAULT_SAMPLING_RATE; if (sflow_cfg->sampling) { oso.sampling_rate = *sflow_cfg->sampling; } oso.polling_interval = SFL_DEFAULT_POLLING_INTERVAL; if (sflow_cfg->polling) { oso.polling_interval = *sflow_cfg->polling; } oso.header_len = SFL_DEFAULT_HEADER_SIZE; if (sflow_cfg->header) { oso.header_len = *sflow_cfg->header; } oso.sub_id = sflow_bridge_number++; oso.agent_device = sflow_cfg->agent; oso.control_ip = NULL; n_controllers = bridge_get_controllers(br, &controllers); for (i = 0; i < n_controllers; i++) { if (controllers[i]->local_ip) { oso.control_ip = controllers[i]->local_ip; break; } } ofproto_set_sflow(br->ofproto, &oso); sset_destroy(&oso.targets); } else { ofproto_set_sflow(br->ofproto, NULL); } /* Update the controller and related settings. It would be more * straightforward to call this from bridge_reconfigure_one(), but we * can't do it there for two reasons. First, and most importantly, at * that point we don't know the dp_ifidx of any interfaces that have * been added to the bridge (because we haven't actually added them to * the datapath). Second, at that point we haven't set the datapath ID * yet; when a controller is configured, resetting the datapath ID will * immediately disconnect from the controller, so it's better to set * the datapath ID before the controller. */ bridge_reconfigure_remotes(br, managers, n_managers); } LIST_FOR_EACH (br, node, &all_bridges) { struct port *port; br->has_bonded_ports = false; HMAP_FOR_EACH (port, hmap_node, &br->ports) { struct iface *iface; port_reconfigure_lacp(port); port_reconfigure_bond(port); LIST_FOR_EACH (iface, port_elem, &port->ifaces) { iface_update_qos(iface, port->cfg->qos); } } } LIST_FOR_EACH (br, node, &all_bridges) { iterate_and_prune_ifaces(br, set_iface_properties, NULL); } /* Some reconfiguration operations require the bridge to have been run at * least once. */ LIST_FOR_EACH (br, node, &all_bridges) { struct iface *iface; bridge_run_one(br); HMAP_FOR_EACH (iface, dp_ifidx_node, &br->ifaces) { iface_update_cfm(iface); } } free(managers); /* ovs-vswitchd has completed initialization, so allow the process that * forked us to exit successfully. */ daemonize_complete(); } static const char * get_ovsrec_key_value(const struct ovsdb_idl_row *row, const struct ovsdb_idl_column *column, const char *key) { const struct ovsdb_datum *datum; union ovsdb_atom atom; unsigned int idx; datum = ovsdb_idl_get(row, column, OVSDB_TYPE_STRING, OVSDB_TYPE_STRING); atom.string = (char *) key; idx = ovsdb_datum_find_key(datum, &atom, OVSDB_TYPE_STRING); return idx == UINT_MAX ? NULL : datum->values[idx].string; } static const char * bridge_get_other_config(const struct ovsrec_bridge *br_cfg, const char *key) { return get_ovsrec_key_value(&br_cfg->header_, &ovsrec_bridge_col_other_config, key); } static void bridge_pick_local_hw_addr(struct bridge *br, uint8_t ea[ETH_ADDR_LEN], struct iface **hw_addr_iface) { const char *hwaddr; struct port *port; int error; *hw_addr_iface = NULL; /* Did the user request a particular MAC? */ hwaddr = bridge_get_other_config(br->cfg, "hwaddr"); if (hwaddr && eth_addr_from_string(hwaddr, ea)) { if (eth_addr_is_multicast(ea)) { VLOG_ERR("bridge %s: cannot set MAC address to multicast " "address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea)); } else if (eth_addr_is_zero(ea)) { VLOG_ERR("bridge %s: cannot set MAC address to zero", br->name); } else { return; } } /* Otherwise choose the minimum non-local MAC address among all of the * interfaces. */ memset(ea, 0xff, ETH_ADDR_LEN); HMAP_FOR_EACH (port, hmap_node, &br->ports) { uint8_t iface_ea[ETH_ADDR_LEN]; struct iface *candidate; struct iface *iface; /* Mirror output ports don't participate. */ if (port->is_mirror_output_port) { continue; } /* Choose the MAC address to represent the port. */ iface = NULL; if (port->cfg->mac && eth_addr_from_string(port->cfg->mac, iface_ea)) { /* Find the interface with this Ethernet address (if any) so that * we can provide the correct devname to the caller. */ LIST_FOR_EACH (candidate, port_elem, &port->ifaces) { uint8_t candidate_ea[ETH_ADDR_LEN]; if (!netdev_get_etheraddr(candidate->netdev, candidate_ea) && eth_addr_equals(iface_ea, candidate_ea)) { iface = candidate; } } } else { /* Choose the interface whose MAC address will represent the port. * The Linux kernel bonding code always chooses the MAC address of * the first slave added to a bond, and the Fedora networking * scripts always add slaves to a bond in alphabetical order, so * for compatibility we choose the interface with the name that is * first in alphabetical order. */ LIST_FOR_EACH (candidate, port_elem, &port->ifaces) { if (!iface || strcmp(candidate->name, iface->name) < 0) { iface = candidate; } } /* The local port doesn't count (since we're trying to choose its * MAC address anyway). */ if (iface->dp_ifidx == ODPP_LOCAL) { continue; } /* Grab MAC. */ error = netdev_get_etheraddr(iface->netdev, iface_ea); if (error) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_ERR_RL(&rl, "failed to obtain Ethernet address of %s: %s", iface->name, strerror(error)); continue; } } /* Compare against our current choice. */ if (!eth_addr_is_multicast(iface_ea) && !eth_addr_is_local(iface_ea) && !eth_addr_is_reserved(iface_ea) && !eth_addr_is_zero(iface_ea) && eth_addr_compare_3way(iface_ea, ea) < 0) { memcpy(ea, iface_ea, ETH_ADDR_LEN); *hw_addr_iface = iface; } } if (eth_addr_is_multicast(ea)) { memcpy(ea, br->default_ea, ETH_ADDR_LEN); *hw_addr_iface = NULL; VLOG_WARN("bridge %s: using default bridge Ethernet " "address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea)); } else { VLOG_DBG("bridge %s: using bridge Ethernet address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea)); } } /* Choose and returns the datapath ID for bridge 'br' given that the bridge * Ethernet address is 'bridge_ea'. If 'bridge_ea' is the Ethernet address of * an interface on 'br', then that interface must be passed in as * 'hw_addr_iface'; if 'bridge_ea' was derived some other way, then * 'hw_addr_iface' must be passed in as a null pointer. */ static uint64_t bridge_pick_datapath_id(struct bridge *br, const uint8_t bridge_ea[ETH_ADDR_LEN], struct iface *hw_addr_iface) { /* * The procedure for choosing a bridge MAC address will, in the most * ordinary case, also choose a unique MAC that we can use as a datapath * ID. In some special cases, though, multiple bridges will end up with * the same MAC address. This is OK for the bridges, but it will confuse * the OpenFlow controller, because each datapath needs a unique datapath * ID. * * Datapath IDs must be unique. It is also very desirable that they be * stable from one run to the next, so that policy set on a datapath * "sticks". */ const char *datapath_id; uint64_t dpid; datapath_id = bridge_get_other_config(br->cfg, "datapath-id"); if (datapath_id && dpid_from_string(datapath_id, &dpid)) { return dpid; } if (hw_addr_iface) { int vlan; if (!netdev_get_vlan_vid(hw_addr_iface->netdev, &vlan)) { /* * A bridge whose MAC address is taken from a VLAN network device * (that is, a network device created with vconfig(8) or similar * tool) will have the same MAC address as a bridge on the VLAN * device's physical network device. * * Handle this case by hashing the physical network device MAC * along with the VLAN identifier. */ uint8_t buf[ETH_ADDR_LEN + 2]; memcpy(buf, bridge_ea, ETH_ADDR_LEN); buf[ETH_ADDR_LEN] = vlan >> 8; buf[ETH_ADDR_LEN + 1] = vlan; return dpid_from_hash(buf, sizeof buf); } else { /* * Assume that this bridge's MAC address is unique, since it * doesn't fit any of the cases we handle specially. */ } } else { /* * A purely internal bridge, that is, one that has no non-virtual * network devices on it at all, is more difficult because it has no * natural unique identifier at all. * * When the host is a XenServer, we handle this case by hashing the * host's UUID with the name of the bridge. Names of bridges are * persistent across XenServer reboots, although they can be reused if * an internal network is destroyed and then a new one is later * created, so this is fairly effective. * * When the host is not a XenServer, we punt by using a random MAC * address on each run. */ const char *host_uuid = xenserver_get_host_uuid(); if (host_uuid) { char *combined = xasprintf("%s,%s", host_uuid, br->name); dpid = dpid_from_hash(combined, strlen(combined)); free(combined); return dpid; } } return eth_addr_to_uint64(bridge_ea); } static uint64_t dpid_from_hash(const void *data, size_t n) { uint8_t hash[SHA1_DIGEST_SIZE]; BUILD_ASSERT_DECL(sizeof hash >= ETH_ADDR_LEN); sha1_bytes(data, n, hash); eth_addr_mark_random(hash); return eth_addr_to_uint64(hash); } static void iface_refresh_status(struct iface *iface) { struct shash sh; enum netdev_flags flags; uint32_t current; int64_t bps; int mtu; int64_t mtu_64; int error; if (iface_is_synthetic(iface)) { return; } shash_init(&sh); if (!netdev_get_status(iface->netdev, &sh)) { size_t n; char **keys, **values; shash_to_ovs_idl_map(&sh, &keys, &values, &n); ovsrec_interface_set_status(iface->cfg, keys, values, n); free(keys); free(values); } else { ovsrec_interface_set_status(iface->cfg, NULL, NULL, 0); } shash_destroy_free_data(&sh); error = netdev_get_flags(iface->netdev, &flags); if (!error) { ovsrec_interface_set_admin_state(iface->cfg, flags & NETDEV_UP ? "up" : "down"); } else { ovsrec_interface_set_admin_state(iface->cfg, NULL); } error = netdev_get_features(iface->netdev, ¤t, NULL, NULL, NULL); if (!error) { ovsrec_interface_set_duplex(iface->cfg, netdev_features_is_full_duplex(current) ? "full" : "half"); /* warning: uint64_t -> int64_t conversion */ bps = netdev_features_to_bps(current); ovsrec_interface_set_link_speed(iface->cfg, &bps, 1); } else { ovsrec_interface_set_duplex(iface->cfg, NULL); ovsrec_interface_set_link_speed(iface->cfg, NULL, 0); } ovsrec_interface_set_link_state(iface->cfg, iface_get_carrier(iface) ? "up" : "down"); error = netdev_get_mtu(iface->netdev, &mtu); if (!error && mtu != INT_MAX) { mtu_64 = mtu; ovsrec_interface_set_mtu(iface->cfg, &mtu_64, 1); } else { ovsrec_interface_set_mtu(iface->cfg, NULL, 0); } } /* Writes 'iface''s CFM statistics to the database. Returns true if anything * changed, false otherwise. */ static bool iface_refresh_cfm_stats(struct iface *iface) { const struct ovsrec_monitor *mon; const struct cfm *cfm; bool changed = false; size_t i; mon = iface->cfg->monitor; cfm = ofproto_iface_get_cfm(iface->port->bridge->ofproto, iface->dp_ifidx); if (!cfm || !mon) { return false; } for (i = 0; i < mon->n_remote_mps; i++) { const struct ovsrec_maintenance_point *mp; const struct remote_mp *rmp; mp = mon->remote_mps[i]; rmp = cfm_get_remote_mp(cfm, mp->mpid); if (mp->n_fault != 1 || mp->fault[0] != rmp->fault) { ovsrec_maintenance_point_set_fault(mp, &rmp->fault, 1); changed = true; } } if (mon->n_fault != 1 || mon->fault[0] != cfm->fault) { ovsrec_monitor_set_fault(mon, &cfm->fault, 1); changed = true; } return changed; } static bool iface_refresh_lacp_stats(struct iface *iface) { bool *db_current = iface->cfg->lacp_current; bool changed = false; if (iface->port->lacp) { bool current = lacp_slave_is_current(iface->port->lacp, iface); if (!db_current || *db_current != current) { changed = true; ovsrec_interface_set_lacp_current(iface->cfg, ¤t, 1); } } else if (db_current) { changed = true; ovsrec_interface_set_lacp_current(iface->cfg, NULL, 0); } return changed; } static void iface_refresh_stats(struct iface *iface) { struct iface_stat { char *name; int offset; }; static const struct iface_stat iface_stats[] = { { "rx_packets", offsetof(struct netdev_stats, rx_packets) }, { "tx_packets", offsetof(struct netdev_stats, tx_packets) }, { "rx_bytes", offsetof(struct netdev_stats, rx_bytes) }, { "tx_bytes", offsetof(struct netdev_stats, tx_bytes) }, { "rx_dropped", offsetof(struct netdev_stats, rx_dropped) }, { "tx_dropped", offsetof(struct netdev_stats, tx_dropped) }, { "rx_errors", offsetof(struct netdev_stats, rx_errors) }, { "tx_errors", offsetof(struct netdev_stats, tx_errors) }, { "rx_frame_err", offsetof(struct netdev_stats, rx_frame_errors) }, { "rx_over_err", offsetof(struct netdev_stats, rx_over_errors) }, { "rx_crc_err", offsetof(struct netdev_stats, rx_crc_errors) }, { "collisions", offsetof(struct netdev_stats, collisions) }, }; enum { N_STATS = ARRAY_SIZE(iface_stats) }; const struct iface_stat *s; char *keys[N_STATS]; int64_t values[N_STATS]; int n; struct netdev_stats stats; if (iface_is_synthetic(iface)) { return; } /* Intentionally ignore return value, since errors will set 'stats' to * all-1s, and we will deal with that correctly below. */ netdev_get_stats(iface->netdev, &stats); n = 0; for (s = iface_stats; s < &iface_stats[N_STATS]; s++) { uint64_t value = *(uint64_t *) (((char *) &stats) + s->offset); if (value != UINT64_MAX) { keys[n] = s->name; values[n] = value; n++; } } ovsrec_interface_set_statistics(iface->cfg, keys, values, n); } static void refresh_system_stats(const struct ovsrec_open_vswitch *cfg) { struct ovsdb_datum datum; struct shash stats; shash_init(&stats); get_system_stats(&stats); ovsdb_datum_from_shash(&datum, &stats); ovsdb_idl_txn_write(&cfg->header_, &ovsrec_open_vswitch_col_statistics, &datum); } static inline const char * nx_role_to_str(enum nx_role role) { switch (role) { case NX_ROLE_OTHER: return "other"; case NX_ROLE_MASTER: return "master"; case NX_ROLE_SLAVE: return "slave"; default: return "*** INVALID ROLE ***"; } } static void bridge_refresh_controller_status(const struct bridge *br) { struct shash info; const struct ovsrec_controller *cfg; ofproto_get_ofproto_controller_info(br->ofproto, &info); OVSREC_CONTROLLER_FOR_EACH(cfg, idl) { struct ofproto_controller_info *cinfo = shash_find_data(&info, cfg->target); if (cinfo) { ovsrec_controller_set_is_connected(cfg, cinfo->is_connected); ovsrec_controller_set_role(cfg, nx_role_to_str(cinfo->role)); ovsrec_controller_set_status(cfg, (char **) cinfo->pairs.keys, (char **) cinfo->pairs.values, cinfo->pairs.n); } else { ovsrec_controller_set_is_connected(cfg, false); ovsrec_controller_set_role(cfg, NULL); ovsrec_controller_set_status(cfg, NULL, NULL, 0); } } ofproto_free_ofproto_controller_info(&info); } void bridge_run(void) { const struct ovsrec_open_vswitch *cfg; bool datapath_destroyed; bool database_changed; struct bridge *br; /* Let each bridge do the work that it needs to do. */ datapath_destroyed = false; LIST_FOR_EACH (br, node, &all_bridges) { int error = bridge_run_one(br); if (error) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_ERR_RL(&rl, "bridge %s: datapath was destroyed externally, " "forcing reconfiguration", br->name); datapath_destroyed = true; } } /* (Re)configure if necessary. */ database_changed = ovsdb_idl_run(idl); cfg = ovsrec_open_vswitch_first(idl); /* Re-configure SSL. We do this on every trip through the main loop, * instead of just when the database changes, because the contents of the * key and certificate files can change without the database changing. * * We do this before bridge_reconfigure() because that function might * initiate SSL connections and thus requires SSL to be configured. */ if (cfg && cfg->ssl) { const struct ovsrec_ssl *ssl = cfg->ssl; stream_ssl_set_key_and_cert(ssl->private_key, ssl->certificate); stream_ssl_set_ca_cert_file(ssl->ca_cert, ssl->bootstrap_ca_cert); } if (database_changed || datapath_destroyed) { if (cfg) { struct ovsdb_idl_txn *txn = ovsdb_idl_txn_create(idl); bridge_configure_once(cfg); bridge_reconfigure(cfg); ovsrec_open_vswitch_set_cur_cfg(cfg, cfg->next_cfg); ovsdb_idl_txn_commit(txn); ovsdb_idl_txn_destroy(txn); /* XXX */ } else { /* We still need to reconfigure to avoid dangling pointers to * now-destroyed ovsrec structures inside bridge data. */ static const struct ovsrec_open_vswitch null_cfg; bridge_reconfigure(&null_cfg); } } /* Refresh system and interface stats if necessary. */ if (time_msec() >= stats_timer) { if (cfg) { struct ovsdb_idl_txn *txn; txn = ovsdb_idl_txn_create(idl); LIST_FOR_EACH (br, node, &all_bridges) { struct port *port; HMAP_FOR_EACH (port, hmap_node, &br->ports) { struct iface *iface; LIST_FOR_EACH (iface, port_elem, &port->ifaces) { iface_refresh_stats(iface); iface_refresh_status(iface); } } bridge_refresh_controller_status(br); } refresh_system_stats(cfg); ovsdb_idl_txn_commit(txn); ovsdb_idl_txn_destroy(txn); /* XXX */ } stats_timer = time_msec() + STATS_INTERVAL; } if (time_msec() >= db_limiter) { struct ovsdb_idl_txn *txn; bool changed = false; txn = ovsdb_idl_txn_create(idl); LIST_FOR_EACH (br, node, &all_bridges) { struct port *port; HMAP_FOR_EACH (port, hmap_node, &br->ports) { struct iface *iface; LIST_FOR_EACH (iface, port_elem, &port->ifaces) { changed = iface_refresh_cfm_stats(iface) || changed; changed = iface_refresh_lacp_stats(iface) || changed; } } } if (changed) { db_limiter = time_msec() + DB_LIMIT_INTERVAL; } ovsdb_idl_txn_commit(txn); ovsdb_idl_txn_destroy(txn); } } void bridge_wait(void) { struct bridge *br; LIST_FOR_EACH (br, node, &all_bridges) { struct port *port; ofproto_wait(br->ofproto); mac_learning_wait(br->ml); HMAP_FOR_EACH (port, hmap_node, &br->ports) { port_wait(port); } } ovsdb_idl_wait(idl); poll_timer_wait_until(stats_timer); if (db_limiter > time_msec()) { poll_timer_wait_until(db_limiter); } } /* Forces 'br' to revalidate all of its flows. This is appropriate when 'br''s * configuration changes. */ static void bridge_flush(struct bridge *br) { COVERAGE_INC(bridge_flush); br->flush = true; } /* Bridge unixctl user interface functions. */ static void bridge_unixctl_fdb_show(struct unixctl_conn *conn, const char *args, void *aux OVS_UNUSED) { struct ds ds = DS_EMPTY_INITIALIZER; const struct bridge *br; const struct mac_entry *e; br = bridge_lookup(args); if (!br) { unixctl_command_reply(conn, 501, "no such bridge"); return; } ds_put_cstr(&ds, " port VLAN MAC Age\n"); LIST_FOR_EACH (e, lru_node, &br->ml->lrus) { struct port *port = e->port.p; ds_put_format(&ds, "%5d %4d "ETH_ADDR_FMT" %3d\n", port_get_an_iface(port)->dp_ifidx, e->vlan, ETH_ADDR_ARGS(e->mac), mac_entry_age(e)); } unixctl_command_reply(conn, 200, ds_cstr(&ds)); ds_destroy(&ds); } /* CFM unixctl user interface functions. */ static void cfm_unixctl_show(struct unixctl_conn *conn, const char *args, void *aux OVS_UNUSED) { struct ds ds = DS_EMPTY_INITIALIZER; struct iface *iface; const struct cfm *cfm; iface = iface_find(args); if (!iface) { unixctl_command_reply(conn, 501, "no such interface"); return; } cfm = ofproto_iface_get_cfm(iface->port->bridge->ofproto, iface->dp_ifidx); if (!cfm) { unixctl_command_reply(conn, 501, "CFM not enabled"); return; } cfm_dump_ds(cfm, &ds); unixctl_command_reply(conn, 200, ds_cstr(&ds)); ds_destroy(&ds); } /* QoS unixctl user interface functions. */ struct qos_unixctl_show_cbdata { struct ds *ds; struct iface *iface; }; static void qos_unixctl_show_cb(unsigned int queue_id, const struct shash *details, void *aux) { struct qos_unixctl_show_cbdata *data = aux; struct ds *ds = data->ds; struct iface *iface = data->iface; struct netdev_queue_stats stats; struct shash_node *node; int error; ds_put_cstr(ds, "\n"); if (queue_id) { ds_put_format(ds, "Queue %u:\n", queue_id); } else { ds_put_cstr(ds, "Default:\n"); } SHASH_FOR_EACH (node, details) { ds_put_format(ds, "\t%s: %s\n", node->name, (char *)node->data); } error = netdev_get_queue_stats(iface->netdev, queue_id, &stats); if (!error) { if (stats.tx_packets != UINT64_MAX) { ds_put_format(ds, "\ttx_packets: %"PRIu64"\n", stats.tx_packets); } if (stats.tx_bytes != UINT64_MAX) { ds_put_format(ds, "\ttx_bytes: %"PRIu64"\n", stats.tx_bytes); } if (stats.tx_errors != UINT64_MAX) { ds_put_format(ds, "\ttx_errors: %"PRIu64"\n", stats.tx_errors); } } else { ds_put_format(ds, "\tFailed to get statistics for queue %u: %s", queue_id, strerror(error)); } } static void qos_unixctl_show(struct unixctl_conn *conn, const char *args, void *aux OVS_UNUSED) { struct ds ds = DS_EMPTY_INITIALIZER; struct shash sh = SHASH_INITIALIZER(&sh); struct iface *iface; const char *type; struct shash_node *node; struct qos_unixctl_show_cbdata data; int error; iface = iface_find(args); if (!iface) { unixctl_command_reply(conn, 501, "no such interface"); return; } netdev_get_qos(iface->netdev, &type, &sh); if (*type != '\0') { ds_put_format(&ds, "QoS: %s %s\n", iface->name, type); SHASH_FOR_EACH (node, &sh) { ds_put_format(&ds, "%s: %s\n", node->name, (char *)node->data); } data.ds = &ds; data.iface = iface; error = netdev_dump_queues(iface->netdev, qos_unixctl_show_cb, &data); if (error) { ds_put_format(&ds, "failed to dump queues: %s", strerror(error)); } unixctl_command_reply(conn, 200, ds_cstr(&ds)); } else { ds_put_format(&ds, "QoS not configured on %s\n", iface->name); unixctl_command_reply(conn, 501, ds_cstr(&ds)); } shash_destroy_free_data(&sh); ds_destroy(&ds); } /* Bridge reconfiguration functions. */ static struct bridge * bridge_create(const struct ovsrec_bridge *br_cfg) { struct bridge *br; int error; assert(!bridge_lookup(br_cfg->name)); br = xzalloc(sizeof *br); error = dpif_create_and_open(br_cfg->name, br_cfg->datapath_type, &br->dpif); if (error) { free(br); return NULL; } error = ofproto_create(br_cfg->name, br_cfg->datapath_type, &bridge_ofhooks, br, &br->ofproto); if (error) { VLOG_ERR("failed to create switch %s: %s", br_cfg->name, strerror(error)); dpif_delete(br->dpif); dpif_close(br->dpif); free(br); return NULL; } br->name = xstrdup(br_cfg->name); br->cfg = br_cfg; br->ml = mac_learning_create(); eth_addr_nicira_random(br->default_ea); hmap_init(&br->ports); hmap_init(&br->ifaces); shash_init(&br->iface_by_name); br->flush = false; list_push_back(&all_bridges, &br->node); VLOG_INFO("created bridge %s on %s", br->name, dpif_name(br->dpif)); return br; } static void bridge_destroy(struct bridge *br) { if (br) { struct port *port, *next; int error; int i; HMAP_FOR_EACH_SAFE (port, next, hmap_node, &br->ports) { port_destroy(port); } for (i = 0; i < MAX_MIRRORS; i++) { mirror_destroy(br->mirrors[i]); } list_remove(&br->node); ofproto_destroy(br->ofproto); error = dpif_delete(br->dpif); if (error && error != ENOENT) { VLOG_ERR("failed to delete %s: %s", dpif_name(br->dpif), strerror(error)); } dpif_close(br->dpif); mac_learning_destroy(br->ml); hmap_destroy(&br->ifaces); hmap_destroy(&br->ports); shash_destroy(&br->iface_by_name); free(br->synth_local_iface.type); free(br->name); free(br); } } static struct bridge * bridge_lookup(const char *name) { struct bridge *br; LIST_FOR_EACH (br, node, &all_bridges) { if (!strcmp(br->name, name)) { return br; } } return NULL; } /* Handle requests for a listing of all flows known by the OpenFlow * stack, including those normally hidden. */ static void bridge_unixctl_dump_flows(struct unixctl_conn *conn, const char *args, void *aux OVS_UNUSED) { struct bridge *br; struct ds results; br = bridge_lookup(args); if (!br) { unixctl_command_reply(conn, 501, "Unknown bridge"); return; } ds_init(&results); ofproto_get_all_flows(br->ofproto, &results); unixctl_command_reply(conn, 200, ds_cstr(&results)); ds_destroy(&results); } /* "bridge/reconnect [BRIDGE]": makes BRIDGE drop all of its controller * connections and reconnect. If BRIDGE is not specified, then all bridges * drop their controller connections and reconnect. */ static void bridge_unixctl_reconnect(struct unixctl_conn *conn, const char *args, void *aux OVS_UNUSED) { struct bridge *br; if (args[0] != '\0') { br = bridge_lookup(args); if (!br) { unixctl_command_reply(conn, 501, "Unknown bridge"); return; } ofproto_reconnect_controllers(br->ofproto); } else { LIST_FOR_EACH (br, node, &all_bridges) { ofproto_reconnect_controllers(br->ofproto); } } unixctl_command_reply(conn, 200, NULL); } static int bridge_run_one(struct bridge *br) { struct port *port; int error; error = ofproto_run1(br->ofproto); if (error) { return error; } mac_learning_run(br->ml, ofproto_get_revalidate_set(br->ofproto)); HMAP_FOR_EACH (port, hmap_node, &br->ports) { port_run(port); } error = ofproto_run2(br->ofproto, br->flush); br->flush = false; return error; } static size_t bridge_get_controllers(const struct bridge *br, struct ovsrec_controller ***controllersp) { struct ovsrec_controller **controllers; size_t n_controllers; controllers = br->cfg->controller; n_controllers = br->cfg->n_controller; if (n_controllers == 1 && !strcmp(controllers[0]->target, "none")) { controllers = NULL; n_controllers = 0; } if (controllersp) { *controllersp = controllers; } return n_controllers; } static void bridge_reconfigure_one(struct bridge *br) { enum ofproto_fail_mode fail_mode; struct port *port, *next; struct shash_node *node; struct shash new_ports; size_t i; /* Collect new ports. */ shash_init(&new_ports); for (i = 0; i < br->cfg->n_ports; i++) { const char *name = br->cfg->ports[i]->name; if (!shash_add_once(&new_ports, name, br->cfg->ports[i])) { VLOG_WARN("bridge %s: %s specified twice as bridge port", br->name, name); } } if (!shash_find(&new_ports, br->name)) { struct dpif_port dpif_port; char *type; VLOG_WARN("bridge %s: no port named %s, synthesizing one", br->name, br->name); dpif_port_query_by_number(br->dpif, ODPP_LOCAL, &dpif_port); type = xstrdup(dpif_port.type ? dpif_port.type : "internal"); dpif_port_destroy(&dpif_port); br->synth_local_port.interfaces = &br->synth_local_ifacep; br->synth_local_port.n_interfaces = 1; br->synth_local_port.name = br->name; br->synth_local_iface.name = br->name; free(br->synth_local_iface.type); br->synth_local_iface.type = type; br->synth_local_ifacep = &br->synth_local_iface; shash_add(&new_ports, br->name, &br->synth_local_port); } /* Get rid of deleted ports. * Get rid of deleted interfaces on ports that still exist. */ HMAP_FOR_EACH_SAFE (port, next, hmap_node, &br->ports) { const struct ovsrec_port *port_cfg; port_cfg = shash_find_data(&new_ports, port->name); if (!port_cfg) { port_destroy(port); } else { port_del_ifaces(port, port_cfg); } } /* Create new ports. * Add new interfaces to existing ports. * Reconfigure existing ports. */ SHASH_FOR_EACH (node, &new_ports) { struct port *port = port_lookup(br, node->name); if (!port) { port = port_create(br, node->name); } port_reconfigure(port, node->data); if (list_is_empty(&port->ifaces)) { VLOG_WARN("bridge %s: port %s has no interfaces, dropping", br->name, port->name); port_destroy(port); } } shash_destroy(&new_ports); /* Set the fail-mode */ fail_mode = !br->cfg->fail_mode || !strcmp(br->cfg->fail_mode, "standalone") ? OFPROTO_FAIL_STANDALONE : OFPROTO_FAIL_SECURE; if (ofproto_get_fail_mode(br->ofproto) != fail_mode && !ofproto_has_primary_controller(br->ofproto)) { ofproto_flush_flows(br->ofproto); } ofproto_set_fail_mode(br->ofproto, fail_mode); /* Delete all flows if we're switching from connected to standalone or vice * versa. (XXX Should we delete all flows if we are switching from one * controller to another?) */ /* Configure OpenFlow controller connection snooping. */ if (!ofproto_has_snoops(br->ofproto)) { struct sset snoops; sset_init(&snoops); sset_add_and_free(&snoops, xasprintf("punix:%s/%s.snoop", ovs_rundir(), br->name)); ofproto_set_snoops(br->ofproto, &snoops); sset_destroy(&snoops); } mirror_reconfigure(br); } /* Initializes 'oc' appropriately as a management service controller for * 'br'. * * The caller must free oc->target when it is no longer needed. */ static void bridge_ofproto_controller_for_mgmt(const struct bridge *br, struct ofproto_controller *oc) { oc->target = xasprintf("punix:%s/%s.mgmt", ovs_rundir(), br->name); oc->max_backoff = 0; oc->probe_interval = 60; oc->band = OFPROTO_OUT_OF_BAND; oc->rate_limit = 0; oc->burst_limit = 0; } /* Converts ovsrec_controller 'c' into an ofproto_controller in 'oc'. */ static void bridge_ofproto_controller_from_ovsrec(const struct ovsrec_controller *c, struct ofproto_controller *oc) { oc->target = c->target; oc->max_backoff = c->max_backoff ? *c->max_backoff / 1000 : 8; oc->probe_interval = c->inactivity_probe ? *c->inactivity_probe / 1000 : 5; oc->band = (!c->connection_mode || !strcmp(c->connection_mode, "in-band") ? OFPROTO_IN_BAND : OFPROTO_OUT_OF_BAND); oc->rate_limit = c->controller_rate_limit ? *c->controller_rate_limit : 0; oc->burst_limit = (c->controller_burst_limit ? *c->controller_burst_limit : 0); } /* Configures the IP stack for 'br''s local interface properly according to the * configuration in 'c'. */ static void bridge_configure_local_iface_netdev(struct bridge *br, struct ovsrec_controller *c) { struct netdev *netdev; struct in_addr mask, gateway; struct iface *local_iface; struct in_addr ip; /* If there's no local interface or no IP address, give up. */ local_iface = iface_from_dp_ifidx(br, ODPP_LOCAL); if (!local_iface || !c->local_ip || !inet_aton(c->local_ip, &ip)) { return; } /* Bring up the local interface. */ netdev = local_iface->netdev; netdev_turn_flags_on(netdev, NETDEV_UP, true); /* Configure the IP address and netmask. */ if (!c->local_netmask || !inet_aton(c->local_netmask, &mask) || !mask.s_addr) { mask.s_addr = guess_netmask(ip.s_addr); } if (!netdev_set_in4(netdev, ip, mask)) { VLOG_INFO("bridge %s: configured IP address "IP_FMT", netmask "IP_FMT, br->name, IP_ARGS(&ip.s_addr), IP_ARGS(&mask.s_addr)); } /* Configure the default gateway. */ if (c->local_gateway && inet_aton(c->local_gateway, &gateway) && gateway.s_addr) { if (!netdev_add_router(netdev, gateway)) { VLOG_INFO("bridge %s: configured gateway "IP_FMT, br->name, IP_ARGS(&gateway.s_addr)); } } } static void bridge_reconfigure_remotes(struct bridge *br, const struct sockaddr_in *managers, size_t n_managers) { const char *disable_ib_str, *queue_id_str; bool disable_in_band = false; int queue_id; struct ovsrec_controller **controllers; size_t n_controllers; bool had_primary; struct ofproto_controller *ocs; size_t n_ocs; size_t i; /* Check if we should disable in-band control on this bridge. */ disable_ib_str = bridge_get_other_config(br->cfg, "disable-in-band"); if (disable_ib_str && !strcmp(disable_ib_str, "true")) { disable_in_band = true; } /* Set OpenFlow queue ID for in-band control. */ queue_id_str = bridge_get_other_config(br->cfg, "in-band-queue"); queue_id = queue_id_str ? strtol(queue_id_str, NULL, 10) : -1; ofproto_set_in_band_queue(br->ofproto, queue_id); if (disable_in_band) { ofproto_set_extra_in_band_remotes(br->ofproto, NULL, 0); } else { ofproto_set_extra_in_band_remotes(br->ofproto, managers, n_managers); } had_primary = ofproto_has_primary_controller(br->ofproto); n_controllers = bridge_get_controllers(br, &controllers); ocs = xmalloc((n_controllers + 1) * sizeof *ocs); n_ocs = 0; bridge_ofproto_controller_for_mgmt(br, &ocs[n_ocs++]); for (i = 0; i < n_controllers; i++) { struct ovsrec_controller *c = controllers[i]; if (!strncmp(c->target, "punix:", 6) || !strncmp(c->target, "unix:", 5)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); /* Prevent remote ovsdb-server users from accessing arbitrary Unix * domain sockets and overwriting arbitrary local files. */ VLOG_ERR_RL(&rl, "%s: not adding Unix domain socket controller " "\"%s\" due to possibility for remote exploit", dpif_name(br->dpif), c->target); continue; } bridge_configure_local_iface_netdev(br, c); bridge_ofproto_controller_from_ovsrec(c, &ocs[n_ocs]); if (disable_in_band) { ocs[n_ocs].band = OFPROTO_OUT_OF_BAND; } n_ocs++; } ofproto_set_controllers(br->ofproto, ocs, n_ocs); free(ocs[0].target); /* From bridge_ofproto_controller_for_mgmt(). */ free(ocs); if (had_primary != ofproto_has_primary_controller(br->ofproto)) { ofproto_flush_flows(br->ofproto); } /* If there are no controllers and the bridge is in standalone * mode, set up a flow that matches every packet and directs * them to OFPP_NORMAL (which goes to us). Otherwise, the * switch is in secure mode and we won't pass any traffic until * a controller has been defined and it tells us to do so. */ if (!n_controllers && ofproto_get_fail_mode(br->ofproto) == OFPROTO_FAIL_STANDALONE) { union ofp_action action; struct cls_rule rule; memset(&action, 0, sizeof action); action.type = htons(OFPAT_OUTPUT); action.output.len = htons(sizeof action); action.output.port = htons(OFPP_NORMAL); cls_rule_init_catchall(&rule, 0); ofproto_add_flow(br->ofproto, &rule, &action, 1); } } static void bridge_get_all_ifaces(const struct bridge *br, struct shash *ifaces) { struct port *port; shash_init(ifaces); HMAP_FOR_EACH (port, hmap_node, &br->ports) { struct iface *iface; LIST_FOR_EACH (iface, port_elem, &port->ifaces) { shash_add_once(ifaces, iface->name, iface); } if (!list_is_short(&port->ifaces) && port->cfg->bond_fake_iface) { shash_add_once(ifaces, port->name, NULL); } } } /* For robustness, in case the administrator moves around datapath ports behind * our back, we re-check all the datapath port numbers here. * * This function will set the 'dp_ifidx' members of interfaces that have * disappeared to -1, so only call this function from a context where those * 'struct iface's will be removed from the bridge. Otherwise, the -1 * 'dp_ifidx'es will cause trouble later when we try to send them to the * datapath, which doesn't support UINT16_MAX+1 ports. */ static void bridge_fetch_dp_ifaces(struct bridge *br) { struct dpif_port_dump dump; struct dpif_port dpif_port; struct port *port; /* Reset all interface numbers. */ HMAP_FOR_EACH (port, hmap_node, &br->ports) { struct iface *iface; LIST_FOR_EACH (iface, port_elem, &port->ifaces) { iface->dp_ifidx = -1; } } hmap_clear(&br->ifaces); DPIF_PORT_FOR_EACH (&dpif_port, &dump, br->dpif) { struct iface *iface = iface_lookup(br, dpif_port.name); if (iface) { if (iface->dp_ifidx >= 0) { VLOG_WARN("%s reported interface %s twice", dpif_name(br->dpif), dpif_port.name); } else if (iface_from_dp_ifidx(br, dpif_port.port_no)) { VLOG_WARN("%s reported interface %"PRIu16" twice", dpif_name(br->dpif), dpif_port.port_no); } else { iface->dp_ifidx = dpif_port.port_no; hmap_insert(&br->ifaces, &iface->dp_ifidx_node, hash_int(iface->dp_ifidx, 0)); } iface_set_ofport(iface->cfg, (iface->dp_ifidx >= 0 ? odp_port_to_ofp_port(iface->dp_ifidx) : -1)); } } } /* Bridge packet processing functions. */ static bool set_dst(struct dst *dst, const struct flow *flow, const struct port *in_port, const struct port *out_port, tag_type *tags) { dst->vlan = (out_port->vlan >= 0 ? OFP_VLAN_NONE : in_port->vlan >= 0 ? in_port->vlan : flow->vlan_tci == 0 ? OFP_VLAN_NONE : vlan_tci_to_vid(flow->vlan_tci)); dst->iface = (!out_port->bond ? port_get_an_iface(out_port) : bond_choose_output_slave(out_port->bond, flow, dst->vlan, tags)); return dst->iface != NULL; } static int mirror_mask_ffs(mirror_mask_t mask) { BUILD_ASSERT_DECL(sizeof(unsigned int) >= sizeof(mask)); return ffs(mask); } static void dst_set_init(struct dst_set *set) { set->dsts = set->builtin; set->n = 0; set->allocated = ARRAY_SIZE(set->builtin); } static void dst_set_add(struct dst_set *set, const struct dst *dst) { if (set->n >= set->allocated) { size_t new_allocated; struct dst *new_dsts; new_allocated = set->allocated * 2; new_dsts = xmalloc(new_allocated * sizeof *new_dsts); memcpy(new_dsts, set->dsts, set->n * sizeof *new_dsts); dst_set_free(set); set->dsts = new_dsts; set->allocated = new_allocated; } set->dsts[set->n++] = *dst; } static void dst_set_free(struct dst_set *set) { if (set->dsts != set->builtin) { free(set->dsts); } } static bool dst_is_duplicate(const struct dst_set *set, const struct dst *test) { size_t i; for (i = 0; i < set->n; i++) { if (set->dsts[i].vlan == test->vlan && set->dsts[i].iface == test->iface) { return true; } } return false; } static bool port_trunks_vlan(const struct port *port, uint16_t vlan) { return (port->vlan < 0 && (!port->trunks || bitmap_is_set(port->trunks, vlan))); } static bool port_includes_vlan(const struct port *port, uint16_t vlan) { return vlan == port->vlan || port_trunks_vlan(port, vlan); } static bool port_is_floodable(const struct port *port) { struct iface *iface; LIST_FOR_EACH (iface, port_elem, &port->ifaces) { if (!ofproto_port_is_floodable(port->bridge->ofproto, iface->dp_ifidx)) { return false; } } return true; } /* Returns an arbitrary interface within 'port'. */ static struct iface * port_get_an_iface(const struct port *port) { return CONTAINER_OF(list_front(&port->ifaces), struct iface, port_elem); } static void compose_dsts(const struct bridge *br, const struct flow *flow, uint16_t vlan, const struct port *in_port, const struct port *out_port, struct dst_set *set, tag_type *tags, uint16_t *nf_output_iface) { struct dst dst; if (out_port == FLOOD_PORT) { struct port *port; HMAP_FOR_EACH (port, hmap_node, &br->ports) { if (port != in_port && port_is_floodable(port) && port_includes_vlan(port, vlan) && !port->is_mirror_output_port && set_dst(&dst, flow, in_port, port, tags)) { dst_set_add(set, &dst); } } *nf_output_iface = NF_OUT_FLOOD; } else if (out_port && set_dst(&dst, flow, in_port, out_port, tags)) { dst_set_add(set, &dst); *nf_output_iface = dst.iface->dp_ifidx; } } static void compose_mirror_dsts(const struct bridge *br, const struct flow *flow, uint16_t vlan, const struct port *in_port, struct dst_set *set, tag_type *tags) { mirror_mask_t mirrors; int flow_vlan; size_t i; mirrors = in_port->src_mirrors; for (i = 0; i < set->n; i++) { mirrors |= set->dsts[i].iface->port->dst_mirrors; } if (!mirrors) { return; } flow_vlan = vlan_tci_to_vid(flow->vlan_tci); if (flow_vlan == 0) { flow_vlan = OFP_VLAN_NONE; } while (mirrors) { struct mirror *m = br->mirrors[mirror_mask_ffs(mirrors) - 1]; if (!m->n_vlans || vlan_is_mirrored(m, vlan)) { struct dst dst; if (m->out_port) { if (set_dst(&dst, flow, in_port, m->out_port, tags) && !dst_is_duplicate(set, &dst)) { dst_set_add(set, &dst); } } else { struct port *port; HMAP_FOR_EACH (port, hmap_node, &br->ports) { if (port_includes_vlan(port, m->out_vlan) && set_dst(&dst, flow, in_port, port, tags)) { if (port->vlan < 0) { dst.vlan = m->out_vlan; } if (dst_is_duplicate(set, &dst)) { continue; } /* Use the vlan tag on the original flow instead of * the one passed in the vlan parameter. This ensures * that we compare the vlan from before any implicit * tagging tags place. This is necessary because * dst->vlan is the final vlan, after removing implicit * tags. */ if (port == in_port && dst.vlan == flow_vlan) { /* Don't send out input port on same VLAN. */ continue; } dst_set_add(set, &dst); } } } } mirrors &= mirrors - 1; } } static void compose_actions(struct bridge *br, const struct flow *flow, uint16_t vlan, const struct port *in_port, const struct port *out_port, tag_type *tags, struct ofpbuf *actions, uint16_t *nf_output_iface) { uint16_t initial_vlan, cur_vlan; const struct dst *dst; struct dst_set set; dst_set_init(&set); compose_dsts(br, flow, vlan, in_port, out_port, &set, tags, nf_output_iface); compose_mirror_dsts(br, flow, vlan, in_port, &set, tags); /* Output all the packets we can without having to change the VLAN. */ initial_vlan = vlan_tci_to_vid(flow->vlan_tci); if (initial_vlan == 0) { initial_vlan = OFP_VLAN_NONE; } for (dst = set.dsts; dst < &set.dsts[set.n]; dst++) { if (dst->vlan != initial_vlan) { continue; } nl_msg_put_u32(actions, ODP_ACTION_ATTR_OUTPUT, dst->iface->dp_ifidx); } /* Then output the rest. */ cur_vlan = initial_vlan; for (dst = set.dsts; dst < &set.dsts[set.n]; dst++) { if (dst->vlan == initial_vlan) { continue; } if (dst->vlan != cur_vlan) { if (dst->vlan == OFP_VLAN_NONE) { nl_msg_put_flag(actions, ODP_ACTION_ATTR_STRIP_VLAN); } else { ovs_be16 tci; tci = htons(dst->vlan & VLAN_VID_MASK); tci |= flow->vlan_tci & htons(VLAN_PCP_MASK); nl_msg_put_be16(actions, ODP_ACTION_ATTR_SET_DL_TCI, tci); } cur_vlan = dst->vlan; } nl_msg_put_u32(actions, ODP_ACTION_ATTR_OUTPUT, dst->iface->dp_ifidx); } dst_set_free(&set); } /* Returns the effective vlan of a packet, taking into account both the * 802.1Q header and implicitly tagged ports. A value of 0 indicates that * the packet is untagged and -1 indicates it has an invalid header and * should be dropped. */ static int flow_get_vlan(struct bridge *br, const struct flow *flow, struct port *in_port, bool have_packet) { int vlan = vlan_tci_to_vid(flow->vlan_tci); if (in_port->vlan >= 0) { if (vlan) { if (have_packet) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged " "packet received on port %s configured with " "implicit VLAN %"PRIu16, br->name, vlan, in_port->name, in_port->vlan); } return -1; } vlan = in_port->vlan; } else { if (!port_includes_vlan(in_port, vlan)) { if (have_packet) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged " "packet received on port %s not configured for " "trunking VLAN %d", br->name, vlan, in_port->name, vlan); } return -1; } } return vlan; } /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to * indicate this; newer upstream kernels use gratuitous ARP requests. */ static bool is_gratuitous_arp(const struct flow *flow) { return (flow->dl_type == htons(ETH_TYPE_ARP) && eth_addr_is_broadcast(flow->dl_dst) && (flow->nw_proto == ARP_OP_REPLY || (flow->nw_proto == ARP_OP_REQUEST && flow->nw_src == flow->nw_dst))); } static void update_learning_table(struct bridge *br, const struct flow *flow, int vlan, struct port *in_port) { struct mac_entry *mac; if (!mac_learning_may_learn(br->ml, flow->dl_src, vlan)) { return; } mac = mac_learning_insert(br->ml, flow->dl_src, vlan); if (is_gratuitous_arp(flow)) { /* We don't want to learn from gratuitous ARP packets that are * reflected back over bond slaves so we lock the learning table. */ if (!in_port->bond) { mac_entry_set_grat_arp_lock(mac); } else if (mac_entry_is_grat_arp_locked(mac)) { return; } } if (mac_entry_is_new(mac) || mac->port.p != in_port) { /* The log messages here could actually be useful in debugging, * so keep the rate limit relatively high. */ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300); VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is " "on port %s in VLAN %d", br->name, ETH_ADDR_ARGS(flow->dl_src), in_port->name, vlan); mac->port.p = in_port; ofproto_revalidate(br->ofproto, mac_learning_changed(br->ml, mac)); } } /* Determines whether packets in 'flow' within 'br' should be forwarded or * dropped. Returns true if they may be forwarded, false if they should be * dropped. * * If 'have_packet' is true, it indicates that the caller is processing a * received packet. If 'have_packet' is false, then the caller is just * revalidating an existing flow because configuration has changed. Either * way, 'have_packet' only affects logging (there is no point in logging errors * during revalidation). * * Sets '*in_portp' to the input port. This will be a null pointer if * flow->in_port does not designate a known input port (in which case * is_admissible() returns false). * * When returning true, sets '*vlanp' to the effective VLAN of the input * packet, as returned by flow_get_vlan(). * * May also add tags to '*tags', although the current implementation only does * so in one special case. */ static bool is_admissible(struct bridge *br, const struct flow *flow, bool have_packet, tag_type *tags, int *vlanp, struct port **in_portp) { struct iface *in_iface; struct port *in_port; int vlan; /* Find the interface and port structure for the received packet. */ in_iface = iface_from_dp_ifidx(br, flow->in_port); if (!in_iface) { /* No interface? Something fishy... */ if (have_packet) { /* Odd. A few possible reasons here: * * - We deleted an interface but there are still a few packets * queued up from it. * * - Someone externally added an interface (e.g. with "ovs-dpctl * add-if") that we don't know about. * * - Packet arrived on the local port but the local port is not * one of our bridge ports. */ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown " "interface %"PRIu16, br->name, flow->in_port); } *in_portp = NULL; return false; } *in_portp = in_port = in_iface->port; *vlanp = vlan = flow_get_vlan(br, flow, in_port, have_packet); if (vlan < 0) { return false; } /* Drop frames for reserved multicast addresses. */ if (eth_addr_is_reserved(flow->dl_dst)) { return false; } /* Drop frames on ports reserved for mirroring. */ if (in_port->is_mirror_output_port) { if (have_packet) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " "%s, which is reserved exclusively for mirroring", br->name, in_port->name); } return false; } if (in_port->bond) { struct mac_entry *mac; switch (bond_check_admissibility(in_port->bond, in_iface, flow->dl_dst, tags)) { case BV_ACCEPT: break; case BV_DROP: return false; case BV_DROP_IF_MOVED: mac = mac_learning_lookup(br->ml, flow->dl_src, vlan, NULL); if (mac && mac->port.p != in_port && (!is_gratuitous_arp(flow) || mac_entry_is_grat_arp_locked(mac))) { return false; } break; } } return true; } /* If the composed actions may be applied to any packet in the given 'flow', * returns true. Otherwise, the actions should only be applied to 'packet', or * not at all, if 'packet' was NULL. */ static bool process_flow(struct bridge *br, const struct flow *flow, const struct ofpbuf *packet, struct ofpbuf *actions, tag_type *tags, uint16_t *nf_output_iface) { struct port *in_port; struct port *out_port; struct mac_entry *mac; int vlan; /* Check whether we should drop packets in this flow. */ if (!is_admissible(br, flow, packet != NULL, tags, &vlan, &in_port)) { out_port = NULL; goto done; } /* Learn source MAC (but don't try to learn from revalidation). */ if (packet) { update_learning_table(br, flow, vlan, in_port); } /* Determine output port. */ mac = mac_learning_lookup(br->ml, flow->dl_dst, vlan, tags); if (mac) { out_port = mac->port.p; } else if (!packet && !eth_addr_is_multicast(flow->dl_dst)) { /* If we are revalidating but don't have a learning entry then * eject the flow. Installing a flow that floods packets opens * up a window of time where we could learn from a packet reflected * on a bond and blackhole packets before the learning table is * updated to reflect the correct port. */ return false; } else { out_port = FLOOD_PORT; } /* Don't send packets out their input ports. */ if (in_port == out_port) { out_port = NULL; } done: if (in_port) { compose_actions(br, flow, vlan, in_port, out_port, tags, actions, nf_output_iface); } return true; } static bool bridge_normal_ofhook_cb(const struct flow *flow, const struct ofpbuf *packet, struct ofpbuf *actions, tag_type *tags, uint16_t *nf_output_iface, void *br_) { struct bridge *br = br_; COVERAGE_INC(bridge_process_flow); return process_flow(br, flow, packet, actions, tags, nf_output_iface); } static bool bridge_special_ofhook_cb(const struct flow *flow, const struct ofpbuf *packet, void *br_) { struct iface *iface; struct bridge *br = br_; iface = iface_from_dp_ifidx(br, flow->in_port); if (flow->dl_type == htons(ETH_TYPE_LACP)) { if (iface && iface->port->lacp && packet) { const struct lacp_pdu *pdu = parse_lacp_packet(packet); if (pdu) { lacp_process_pdu(iface->port->lacp, iface, pdu); } } return false; } return true; } static void bridge_account_flow_ofhook_cb(const struct flow *flow, tag_type tags, const struct nlattr *actions, size_t actions_len, uint64_t n_bytes, void *br_) { struct bridge *br = br_; const struct nlattr *a; struct port *in_port; tag_type dummy = 0; unsigned int left; int vlan; /* Feed information from the active flows back into the learning table to * ensure that table is always in sync with what is actually flowing * through the datapath. * * We test that 'tags' is nonzero to ensure that only flows that include an * OFPP_NORMAL action are used for learning. This works because * bridge_normal_ofhook_cb() always sets a nonzero tag value. */ if (tags && is_admissible(br, flow, false, &dummy, &vlan, &in_port)) { update_learning_table(br, flow, vlan, in_port); } /* Account for bond slave utilization. */ if (!br->has_bonded_ports) { return; } NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) { if (nl_attr_type(a) == ODP_ACTION_ATTR_OUTPUT) { struct port *out_port = port_from_dp_ifidx(br, nl_attr_get_u32(a)); if (out_port && out_port->bond) { uint16_t vlan = (flow->vlan_tci ? vlan_tci_to_vid(flow->vlan_tci) : OFP_VLAN_NONE); bond_account(out_port->bond, flow, vlan, n_bytes); } } } } static void bridge_account_checkpoint_ofhook_cb(void *br_) { struct bridge *br = br_; struct port *port; HMAP_FOR_EACH (port, hmap_node, &br->ports) { if (port->bond) { bond_rebalance(port->bond, ofproto_get_revalidate_set(br->ofproto)); } } } static uint16_t bridge_autopath_ofhook_cb(const struct flow *flow, uint32_t ofp_port, tag_type *tags, void *br_) { struct bridge *br = br_; uint16_t odp_port = ofp_port_to_odp_port(ofp_port); struct port *port = port_from_dp_ifidx(br, odp_port); uint16_t ret; if (!port) { ret = ODPP_NONE; } else if (list_is_short(&port->ifaces)) { ret = odp_port; } else { struct iface *iface; /* Autopath does not support VLAN hashing. */ iface = bond_choose_output_slave(port->bond, flow, OFP_VLAN_NONE, tags); ret = iface ? iface->dp_ifidx : ODPP_NONE; } return odp_port_to_ofp_port(ret); } static struct ofhooks bridge_ofhooks = { bridge_normal_ofhook_cb, bridge_special_ofhook_cb, bridge_account_flow_ofhook_cb, bridge_account_checkpoint_ofhook_cb, bridge_autopath_ofhook_cb, }; /* Port functions. */ static void lacp_send_pdu_cb(void *iface_, const struct lacp_pdu *pdu) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 10); struct iface *iface = iface_; uint8_t ea[ETH_ADDR_LEN]; int error; error = netdev_get_etheraddr(iface->netdev, ea); if (!error) { struct lacp_pdu *packet_pdu; struct ofpbuf packet; ofpbuf_init(&packet, 0); packet_pdu = eth_compose(&packet, eth_addr_lacp, ea, ETH_TYPE_LACP, sizeof *packet_pdu); *packet_pdu = *pdu; error = netdev_send(iface->netdev, &packet); if (error) { VLOG_WARN_RL(&rl, "port %s: sending LACP PDU on iface %s failed " "(%s)", iface->port->name, iface->name, strerror(error)); } ofpbuf_uninit(&packet); } else { VLOG_ERR_RL(&rl, "port %s: cannot obtain Ethernet address of iface " "%s (%s)", iface->port->name, iface->name, strerror(error)); } } static void port_run(struct port *port) { if (port->lacp) { lacp_run(port->lacp, lacp_send_pdu_cb); } if (port->bond) { struct iface *iface; LIST_FOR_EACH (iface, port_elem, &port->ifaces) { bool may_enable = lacp_slave_may_enable(port->lacp, iface); bond_slave_set_lacp_may_enable(port->bond, iface, may_enable); } bond_run(port->bond, ofproto_get_revalidate_set(port->bridge->ofproto), lacp_negotiated(port->lacp)); if (bond_should_send_learning_packets(port->bond)) { port_send_learning_packets(port); } } } static void port_wait(struct port *port) { if (port->lacp) { lacp_wait(port->lacp); } if (port->bond) { bond_wait(port->bond); } } static struct port * port_create(struct bridge *br, const char *name) { struct port *port; port = xzalloc(sizeof *port); port->bridge = br; port->vlan = -1; port->trunks = NULL; port->name = xstrdup(name); list_init(&port->ifaces); hmap_insert(&br->ports, &port->hmap_node, hash_string(port->name, 0)); VLOG_INFO("created port %s on bridge %s", port->name, br->name); bridge_flush(br); return port; } static const char * get_port_other_config(const struct ovsrec_port *port, const char *key, const char *default_value) { const char *value; value = get_ovsrec_key_value(&port->header_, &ovsrec_port_col_other_config, key); return value ? value : default_value; } static const char * get_interface_other_config(const struct ovsrec_interface *iface, const char *key, const char *default_value) { const char *value; value = get_ovsrec_key_value(&iface->header_, &ovsrec_interface_col_other_config, key); return value ? value : default_value; } static void port_del_ifaces(struct port *port, const struct ovsrec_port *cfg) { struct iface *iface, *next; struct sset new_ifaces; size_t i; /* Collect list of new interfaces. */ sset_init(&new_ifaces); for (i = 0; i < cfg->n_interfaces; i++) { const char *name = cfg->interfaces[i]->name; sset_add(&new_ifaces, name); } /* Get rid of deleted interfaces. */ LIST_FOR_EACH_SAFE (iface, next, port_elem, &port->ifaces) { if (!sset_contains(&new_ifaces, iface->name)) { iface_destroy(iface); } } sset_destroy(&new_ifaces); } /* Expires all MAC learning entries associated with 'port' and forces ofproto * to revalidate every flow. */ static void port_flush_macs(struct port *port) { struct bridge *br = port->bridge; struct mac_learning *ml = br->ml; struct mac_entry *mac, *next_mac; bridge_flush(br); LIST_FOR_EACH_SAFE (mac, next_mac, lru_node, &ml->lrus) { if (mac->port.p == port) { mac_learning_expire(ml, mac); } } } static void port_reconfigure(struct port *port, const struct ovsrec_port *cfg) { struct sset new_ifaces; bool need_flush = false; unsigned long *trunks; int vlan; size_t i; port->cfg = cfg; /* Add new interfaces and update 'cfg' member of existing ones. */ sset_init(&new_ifaces); for (i = 0; i < cfg->n_interfaces; i++) { const struct ovsrec_interface *if_cfg = cfg->interfaces[i]; struct iface *iface; const char *type; if (!sset_add(&new_ifaces, if_cfg->name)) { VLOG_WARN("port %s: %s specified twice as port interface", port->name, if_cfg->name); iface_set_ofport(if_cfg, -1); continue; } /* Determine interface type. The local port always has type * "internal". Other ports take their type from the database and * default to "system" if none is specified. */ type = (!strcmp(if_cfg->name, port->bridge->name) ? "internal" : if_cfg->type[0] ? if_cfg->type : "system"); iface = iface_lookup(port->bridge, if_cfg->name); if (!strcmp(type, "null")) { iface_destroy(iface); continue; } else if (iface) { if (iface->port != port) { VLOG_ERR("bridge %s: %s interface is on multiple ports, " "removing from %s", port->bridge->name, if_cfg->name, iface->port->name); continue; } iface->cfg = if_cfg; } else { iface = iface_create(port, if_cfg); } iface->type = type; } sset_destroy(&new_ifaces); /* Get VLAN tag. */ vlan = -1; if (cfg->tag) { if (list_is_short(&port->ifaces)) { vlan = *cfg->tag; if (vlan >= 0 && vlan <= 4095) { VLOG_DBG("port %s: assigning VLAN tag %d", port->name, vlan); } else { vlan = -1; } } else { /* It's possible that bonded, VLAN-tagged ports make sense. Maybe * they even work as-is. But they have not been tested. */ VLOG_WARN("port %s: VLAN tags not supported on bonded ports", port->name); } } if (port->vlan != vlan) { port->vlan = vlan; need_flush = true; } /* Get trunked VLANs. */ trunks = NULL; if (vlan < 0 && cfg->n_trunks) { size_t n_errors; trunks = bitmap_allocate(4096); n_errors = 0; for (i = 0; i < cfg->n_trunks; i++) { int trunk = cfg->trunks[i]; if (trunk >= 0) { bitmap_set1(trunks, trunk); } else { n_errors++; } } if (n_errors) { VLOG_ERR("port %s: invalid values for %zu trunk VLANs", port->name, cfg->n_trunks); } if (n_errors == cfg->n_trunks) { VLOG_ERR("port %s: no valid trunks, trunking all VLANs", port->name); bitmap_free(trunks); trunks = NULL; } } else if (vlan >= 0 && cfg->n_trunks) { VLOG_ERR("port %s: ignoring trunks in favor of implicit vlan", port->name); } if (trunks == NULL ? port->trunks != NULL : port->trunks == NULL || !bitmap_equal(trunks, port->trunks, 4096)) { need_flush = true; } bitmap_free(port->trunks); port->trunks = trunks; if (need_flush) { port_flush_macs(port); } } static void port_destroy(struct port *port) { if (port) { struct bridge *br = port->bridge; struct iface *iface, *next; int i; for (i = 0; i < MAX_MIRRORS; i++) { struct mirror *m = br->mirrors[i]; if (m && m->out_port == port) { mirror_destroy(m); } } LIST_FOR_EACH_SAFE (iface, next, port_elem, &port->ifaces) { iface_destroy(iface); } hmap_remove(&br->ports, &port->hmap_node); VLOG_INFO("destroyed port %s on bridge %s", port->name, br->name); bond_destroy(port->bond); lacp_destroy(port->lacp); port_flush_macs(port); bitmap_free(port->trunks); free(port->name); free(port); } } static struct port * port_from_dp_ifidx(const struct bridge *br, uint16_t dp_ifidx) { struct iface *iface = iface_from_dp_ifidx(br, dp_ifidx); return iface ? iface->port : NULL; } static struct port * port_lookup(const struct bridge *br, const char *name) { struct port *port; HMAP_FOR_EACH_WITH_HASH (port, hmap_node, hash_string(name, 0), &br->ports) { if (!strcmp(port->name, name)) { return port; } } return NULL; } static bool enable_lacp(struct port *port, bool *activep) { if (!port->cfg->lacp) { /* XXX when LACP implementation has been sufficiently tested, enable by * default and make active on bonded ports. */ return false; } else if (!strcmp(port->cfg->lacp, "off")) { return false; } else if (!strcmp(port->cfg->lacp, "active")) { *activep = true; return true; } else if (!strcmp(port->cfg->lacp, "passive")) { *activep = false; return true; } else { VLOG_WARN("port %s: unknown LACP mode %s", port->name, port->cfg->lacp); return false; } } static void iface_reconfigure_lacp(struct iface *iface) { struct lacp_slave_settings s; int priority, portid, key; portid = atoi(get_interface_other_config(iface->cfg, "lacp-port-id", "0")); priority = atoi(get_interface_other_config(iface->cfg, "lacp-port-priority", "0")); key = atoi(get_interface_other_config(iface->cfg, "lacp-aggregation-key", "0")); if (portid <= 0 || portid > UINT16_MAX) { portid = iface->dp_ifidx; } if (priority <= 0 || priority > UINT16_MAX) { priority = UINT16_MAX; } if (key < 0 || key > UINT16_MAX) { key = 0; } s.name = iface->name; s.id = portid; s.priority = priority; s.key = key; lacp_slave_register(iface->port->lacp, iface, &s); } static void port_reconfigure_lacp(struct port *port) { static struct lacp_settings s; struct iface *iface; uint8_t sysid[ETH_ADDR_LEN]; const char *sysid_str; const char *lacp_time; long long int custom_time; int priority; if (!enable_lacp(port, &s.active)) { lacp_destroy(port->lacp); port->lacp = NULL; return; } sysid_str = get_port_other_config(port->cfg, "lacp-system-id", NULL); if (sysid_str && eth_addr_from_string(sysid_str, sysid)) { memcpy(s.id, sysid, ETH_ADDR_LEN); } else { memcpy(s.id, port->bridge->ea, ETH_ADDR_LEN); } s.name = port->name; /* Prefer bondable links if unspecified. */ priority = atoi(get_port_other_config(port->cfg, "lacp-system-priority", "0")); s.priority = (priority > 0 && priority <= UINT16_MAX ? priority : UINT16_MAX - !list_is_short(&port->ifaces)); s.heartbeat = !strcmp(get_port_other_config(port->cfg, "lacp-heartbeat", "false"), "true"); lacp_time = get_port_other_config(port->cfg, "lacp-time", "slow"); custom_time = atoi(lacp_time); if (!strcmp(lacp_time, "fast")) { s.lacp_time = LACP_TIME_FAST; } else if (!strcmp(lacp_time, "slow")) { s.lacp_time = LACP_TIME_SLOW; } else if (custom_time > 0) { s.lacp_time = LACP_TIME_CUSTOM; s.custom_time = custom_time; } else { s.lacp_time = LACP_TIME_SLOW; } if (!port->lacp) { port->lacp = lacp_create(); } lacp_configure(port->lacp, &s); LIST_FOR_EACH (iface, port_elem, &port->ifaces) { iface_reconfigure_lacp(iface); } } static void port_reconfigure_bond(struct port *port) { struct bond_settings s; const char *detect_s; struct iface *iface; if (list_is_short(&port->ifaces)) { /* Not a bonded port. */ bond_destroy(port->bond); port->bond = NULL; return; } port->bridge->has_bonded_ports = true; s.name = port->name; s.balance = BM_SLB; if (port->cfg->bond_mode && !bond_mode_from_string(&s.balance, port->cfg->bond_mode)) { VLOG_WARN("port %s: unknown bond_mode %s, defaulting to %s", port->name, port->cfg->bond_mode, bond_mode_to_string(s.balance)); } s.detect = BLSM_CARRIER; detect_s = get_port_other_config(port->cfg, "bond-detect-mode", NULL); if (detect_s && !bond_detect_mode_from_string(&s.detect, detect_s)) { VLOG_WARN("port %s: unsupported bond-detect-mode %s, " "defaulting to %s", port->name, detect_s, bond_detect_mode_to_string(s.detect)); } s.miimon_interval = atoi( get_port_other_config(port->cfg, "bond-miimon-interval", "200")); if (s.miimon_interval < 100) { s.miimon_interval = 100; } s.up_delay = MAX(0, port->cfg->bond_updelay); s.down_delay = MAX(0, port->cfg->bond_downdelay); s.basis = atoi(get_port_other_config(port->cfg, "bond-hash-basis", "0")); s.rebalance_interval = atoi( get_port_other_config(port->cfg, "bond-rebalance-interval", "10000")); if (s.rebalance_interval < 1000) { s.rebalance_interval = 1000; } s.fake_iface = port->cfg->bond_fake_iface; if (!port->bond) { port->bond = bond_create(&s); } else { if (bond_reconfigure(port->bond, &s)) { bridge_flush(port->bridge); } } LIST_FOR_EACH (iface, port_elem, &port->ifaces) { long long stable_id; stable_id = atoll(get_interface_other_config(iface->cfg, "bond-stable-id", "0")); if (stable_id <= 0 || stable_id >= UINT32_MAX) { stable_id = odp_port_to_ofp_port(iface->dp_ifidx); } bond_slave_register(iface->port->bond, iface, stable_id, iface->netdev); } } static void port_send_learning_packets(struct port *port) { struct bridge *br = port->bridge; int error, n_packets, n_errors; struct mac_entry *e; error = n_packets = n_errors = 0; LIST_FOR_EACH (e, lru_node, &br->ml->lrus) { if (e->port.p != port) { int ret = bond_send_learning_packet(port->bond, e->mac, e->vlan); if (ret) { error = ret; n_errors++; } n_packets++; } } if (n_errors) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_WARN_RL(&rl, "bond %s: %d errors sending %d gratuitous learning " "packets, last error was: %s", port->name, n_errors, n_packets, strerror(error)); } else { VLOG_DBG("bond %s: sent %d gratuitous learning packets", port->name, n_packets); } } /* Interface functions. */ static struct iface * iface_create(struct port *port, const struct ovsrec_interface *if_cfg) { struct bridge *br = port->bridge; struct iface *iface; char *name = if_cfg->name; iface = xzalloc(sizeof *iface); iface->port = port; iface->name = xstrdup(name); iface->dp_ifidx = -1; iface->tag = tag_create_random(); iface->netdev = NULL; iface->cfg = if_cfg; shash_add_assert(&br->iface_by_name, iface->name, iface); list_push_back(&port->ifaces, &iface->port_elem); VLOG_DBG("attached network device %s to port %s", iface->name, port->name); bridge_flush(br); return iface; } static void iface_destroy(struct iface *iface) { if (iface) { struct port *port = iface->port; struct bridge *br = port->bridge; if (port->bond) { bond_slave_unregister(port->bond, iface); } if (port->lacp) { lacp_slave_unregister(port->lacp, iface); } shash_find_and_delete_assert(&br->iface_by_name, iface->name); if (iface->dp_ifidx >= 0) { hmap_remove(&br->ifaces, &iface->dp_ifidx_node); } list_remove(&iface->port_elem); netdev_close(iface->netdev); free(iface->name); free(iface); bridge_flush(port->bridge); } } static struct iface * iface_lookup(const struct bridge *br, const char *name) { return shash_find_data(&br->iface_by_name, name); } static struct iface * iface_find(const char *name) { const struct bridge *br; LIST_FOR_EACH (br, node, &all_bridges) { struct iface *iface = iface_lookup(br, name); if (iface) { return iface; } } return NULL; } static struct iface * iface_from_dp_ifidx(const struct bridge *br, uint16_t dp_ifidx) { struct iface *iface; HMAP_FOR_EACH_IN_BUCKET (iface, dp_ifidx_node, hash_int(dp_ifidx, 0), &br->ifaces) { if (iface->dp_ifidx == dp_ifidx) { return iface; } } return NULL; } /* Set Ethernet address of 'iface', if one is specified in the configuration * file. */ static void iface_set_mac(struct iface *iface) { uint8_t ea[ETH_ADDR_LEN]; if (!strcmp(iface->type, "internal") && iface->cfg->mac && eth_addr_from_string(iface->cfg->mac, ea)) { if (iface->dp_ifidx == ODPP_LOCAL) { VLOG_ERR("interface %s: ignoring mac in Interface record " "(use Bridge record to set local port's mac)", iface->name); } else if (eth_addr_is_multicast(ea)) { VLOG_ERR("interface %s: cannot set MAC to multicast address", iface->name); } else { int error = netdev_set_etheraddr(iface->netdev, ea); if (error) { VLOG_ERR("interface %s: setting MAC failed (%s)", iface->name, strerror(error)); } } } } /* Sets the ofport column of 'if_cfg' to 'ofport'. */ static void iface_set_ofport(const struct ovsrec_interface *if_cfg, int64_t ofport) { if (if_cfg && !ovsdb_idl_row_is_synthetic(&if_cfg->header_)) { ovsrec_interface_set_ofport(if_cfg, &ofport, 1); } } /* Adds the 'n' key-value pairs in 'keys' in 'values' to 'shash'. * * The value strings in '*shash' are taken directly from values[], not copied, * so the caller should not modify or free them. */ static void shash_from_ovs_idl_map(char **keys, char **values, size_t n, struct shash *shash) { size_t i; shash_init(shash); for (i = 0; i < n; i++) { shash_add(shash, keys[i], values[i]); } } /* Creates 'keys' and 'values' arrays from 'shash'. * * Sets 'keys' and 'values' to heap allocated arrays representing the key-value * pairs in 'shash'. The caller takes ownership of 'keys' and 'values'. They * are populated with with strings taken directly from 'shash' and thus have * the same ownership of the key-value pairs in shash. */ static void shash_to_ovs_idl_map(struct shash *shash, char ***keys, char ***values, size_t *n) { size_t i, count; char **k, **v; struct shash_node *sn; count = shash_count(shash); k = xmalloc(count * sizeof *k); v = xmalloc(count * sizeof *v); i = 0; SHASH_FOR_EACH(sn, shash) { k[i] = sn->name; v[i] = sn->data; i++; } *n = count; *keys = k; *values = v; } struct iface_delete_queues_cbdata { struct netdev *netdev; const struct ovsdb_datum *queues; }; static bool queue_ids_include(const struct ovsdb_datum *queues, int64_t target) { union ovsdb_atom atom; atom.integer = target; return ovsdb_datum_find_key(queues, &atom, OVSDB_TYPE_INTEGER) != UINT_MAX; } static void iface_delete_queues(unsigned int queue_id, const struct shash *details OVS_UNUSED, void *cbdata_) { struct iface_delete_queues_cbdata *cbdata = cbdata_; if (!queue_ids_include(cbdata->queues, queue_id)) { netdev_delete_queue(cbdata->netdev, queue_id); } } static void iface_update_qos(struct iface *iface, const struct ovsrec_qos *qos) { if (!qos || qos->type[0] == '\0' || qos->n_queues < 1) { netdev_set_qos(iface->netdev, NULL, NULL); } else { struct iface_delete_queues_cbdata cbdata; struct shash details; size_t i; /* Configure top-level Qos for 'iface'. */ shash_from_ovs_idl_map(qos->key_other_config, qos->value_other_config, qos->n_other_config, &details); netdev_set_qos(iface->netdev, qos->type, &details); shash_destroy(&details); /* Deconfigure queues that were deleted. */ cbdata.netdev = iface->netdev; cbdata.queues = ovsrec_qos_get_queues(qos, OVSDB_TYPE_INTEGER, OVSDB_TYPE_UUID); netdev_dump_queues(iface->netdev, iface_delete_queues, &cbdata); /* Configure queues for 'iface'. */ for (i = 0; i < qos->n_queues; i++) { const struct ovsrec_queue *queue = qos->value_queues[i]; unsigned int queue_id = qos->key_queues[i]; shash_from_ovs_idl_map(queue->key_other_config, queue->value_other_config, queue->n_other_config, &details); netdev_set_queue(iface->netdev, queue_id, &details); shash_destroy(&details); } } } static void iface_update_cfm(struct iface *iface) { size_t i; struct cfm cfm; uint16_t *remote_mps; struct ovsrec_monitor *mon; uint8_t maid[CCM_MAID_LEN]; mon = iface->cfg->monitor; if (!mon) { ofproto_iface_clear_cfm(iface->port->bridge->ofproto, iface->dp_ifidx); return; } if (!cfm_generate_maid(mon->md_name, mon->ma_name, maid)) { VLOG_WARN("interface %s: Failed to generate MAID.", iface->name); return; } cfm.mpid = mon->mpid; cfm.interval = mon->interval ? *mon->interval : 1000; memcpy(cfm.maid, maid, sizeof cfm.maid); remote_mps = xzalloc(mon->n_remote_mps * sizeof *remote_mps); for(i = 0; i < mon->n_remote_mps; i++) { remote_mps[i] = mon->remote_mps[i]->mpid; } ofproto_iface_set_cfm(iface->port->bridge->ofproto, iface->dp_ifidx, &cfm, remote_mps, mon->n_remote_mps); free(remote_mps); } /* Read carrier or miimon status directly from 'iface''s netdev, according to * how 'iface''s port is configured. * * Returns true if 'iface' is up, false otherwise. */ static bool iface_get_carrier(const struct iface *iface) { /* XXX */ return netdev_get_carrier(iface->netdev); } /* Returns true if 'iface' is synthetic, that is, if we constructed it locally * instead of obtaining it from the database. */ static bool iface_is_synthetic(const struct iface *iface) { return ovsdb_idl_row_is_synthetic(&iface->cfg->header_); } /* Port mirroring. */ static struct mirror * mirror_find_by_uuid(struct bridge *br, const struct uuid *uuid) { int i; for (i = 0; i < MAX_MIRRORS; i++) { struct mirror *m = br->mirrors[i]; if (m && uuid_equals(uuid, &m->uuid)) { return m; } } return NULL; } static void mirror_reconfigure(struct bridge *br) { unsigned long *rspan_vlans; struct port *port; int i; /* Get rid of deleted mirrors. */ for (i = 0; i < MAX_MIRRORS; i++) { struct mirror *m = br->mirrors[i]; if (m) { const struct ovsdb_datum *mc; union ovsdb_atom atom; mc = ovsrec_bridge_get_mirrors(br->cfg, OVSDB_TYPE_UUID); atom.uuid = br->mirrors[i]->uuid; if (ovsdb_datum_find_key(mc, &atom, OVSDB_TYPE_UUID) == UINT_MAX) { mirror_destroy(m); } } } /* Add new mirrors and reconfigure existing ones. */ for (i = 0; i < br->cfg->n_mirrors; i++) { struct ovsrec_mirror *cfg = br->cfg->mirrors[i]; struct mirror *m = mirror_find_by_uuid(br, &cfg->header_.uuid); if (m) { mirror_reconfigure_one(m, cfg); } else { mirror_create(br, cfg); } } /* Update port reserved status. */ HMAP_FOR_EACH (port, hmap_node, &br->ports) { port->is_mirror_output_port = false; } for (i = 0; i < MAX_MIRRORS; i++) { struct mirror *m = br->mirrors[i]; if (m && m->out_port) { m->out_port->is_mirror_output_port = true; } } /* Update flooded vlans (for RSPAN). */ rspan_vlans = NULL; if (br->cfg->n_flood_vlans) { rspan_vlans = bitmap_allocate(4096); for (i = 0; i < br->cfg->n_flood_vlans; i++) { int64_t vlan = br->cfg->flood_vlans[i]; if (vlan >= 0 && vlan < 4096) { bitmap_set1(rspan_vlans, vlan); VLOG_INFO("bridge %s: disabling learning on vlan %"PRId64, br->name, vlan); } else { VLOG_ERR("bridge %s: invalid value %"PRId64 "for flood VLAN", br->name, vlan); } } } if (mac_learning_set_flood_vlans(br->ml, rspan_vlans)) { bridge_flush(br); mac_learning_flush(br->ml); } } static void mirror_create(struct bridge *br, struct ovsrec_mirror *cfg) { struct mirror *m; size_t i; for (i = 0; ; i++) { if (i >= MAX_MIRRORS) { VLOG_WARN("bridge %s: maximum of %d port mirrors reached, " "cannot create %s", br->name, MAX_MIRRORS, cfg->name); return; } if (!br->mirrors[i]) { break; } } VLOG_INFO("created port mirror %s on bridge %s", cfg->name, br->name); bridge_flush(br); mac_learning_flush(br->ml); br->mirrors[i] = m = xzalloc(sizeof *m); m->uuid = cfg->header_.uuid; m->bridge = br; m->idx = i; m->name = xstrdup(cfg->name); sset_init(&m->src_ports); sset_init(&m->dst_ports); m->vlans = NULL; m->n_vlans = 0; m->out_vlan = -1; m->out_port = NULL; mirror_reconfigure_one(m, cfg); } static void mirror_destroy(struct mirror *m) { if (m) { struct bridge *br = m->bridge; struct port *port; HMAP_FOR_EACH (port, hmap_node, &br->ports) { port->src_mirrors &= ~(MIRROR_MASK_C(1) << m->idx); port->dst_mirrors &= ~(MIRROR_MASK_C(1) << m->idx); } sset_destroy(&m->src_ports); sset_destroy(&m->dst_ports); free(m->vlans); m->bridge->mirrors[m->idx] = NULL; free(m->name); free(m); bridge_flush(br); mac_learning_flush(br->ml); } } static void mirror_collect_ports(struct mirror *m, struct ovsrec_port **ports, int n_ports, struct sset *names) { size_t i; for (i = 0; i < n_ports; i++) { const char *name = ports[i]->name; if (port_lookup(m->bridge, name)) { sset_add(names, name); } else { VLOG_WARN("bridge %s: mirror %s cannot match on nonexistent " "port %s", m->bridge->name, m->name, name); } } } static size_t mirror_collect_vlans(struct mirror *m, const struct ovsrec_mirror *cfg, int **vlans) { size_t n_vlans; size_t i; *vlans = xmalloc(sizeof **vlans * cfg->n_select_vlan); n_vlans = 0; for (i = 0; i < cfg->n_select_vlan; i++) { int64_t vlan = cfg->select_vlan[i]; if (vlan < 0 || vlan > 4095) { VLOG_WARN("bridge %s: mirror %s selects invalid VLAN %"PRId64, m->bridge->name, m->name, vlan); } else { (*vlans)[n_vlans++] = vlan; } } return n_vlans; } static bool vlan_is_mirrored(const struct mirror *m, int vlan) { size_t i; for (i = 0; i < m->n_vlans; i++) { if (m->vlans[i] == vlan) { return true; } } return false; } static void mirror_reconfigure_one(struct mirror *m, struct ovsrec_mirror *cfg) { struct sset src_ports, dst_ports; mirror_mask_t mirror_bit; struct port *out_port; struct port *port; int out_vlan; size_t n_vlans; int *vlans; /* Set name. */ if (strcmp(cfg->name, m->name)) { free(m->name); m->name = xstrdup(cfg->name); } /* Get output port. */ if (cfg->output_port) { out_port = port_lookup(m->bridge, cfg->output_port->name); if (!out_port) { VLOG_ERR("bridge %s: mirror %s outputs to port not on bridge", m->bridge->name, m->name); mirror_destroy(m); return; } out_vlan = -1; if (cfg->output_vlan) { VLOG_ERR("bridge %s: mirror %s specifies both output port and " "output vlan; ignoring output vlan", m->bridge->name, m->name); } } else if (cfg->output_vlan) { out_port = NULL; out_vlan = *cfg->output_vlan; } else { VLOG_ERR("bridge %s: mirror %s does not specify output; ignoring", m->bridge->name, m->name); mirror_destroy(m); return; } sset_init(&src_ports); sset_init(&dst_ports); if (cfg->select_all) { HMAP_FOR_EACH (port, hmap_node, &m->bridge->ports) { sset_add(&src_ports, port->name); sset_add(&dst_ports, port->name); } vlans = NULL; n_vlans = 0; } else { /* Get ports, and drop duplicates and ports that don't exist. */ mirror_collect_ports(m, cfg->select_src_port, cfg->n_select_src_port, &src_ports); mirror_collect_ports(m, cfg->select_dst_port, cfg->n_select_dst_port, &dst_ports); /* Get all the vlans, and drop duplicate and invalid vlans. */ n_vlans = mirror_collect_vlans(m, cfg, &vlans); } /* Update mirror data. */ if (!sset_equals(&m->src_ports, &src_ports) || !sset_equals(&m->dst_ports, &dst_ports) || m->n_vlans != n_vlans || memcmp(m->vlans, vlans, sizeof *vlans * n_vlans) || m->out_port != out_port || m->out_vlan != out_vlan) { bridge_flush(m->bridge); mac_learning_flush(m->bridge->ml); } sset_swap(&m->src_ports, &src_ports); sset_swap(&m->dst_ports, &dst_ports); free(m->vlans); m->vlans = vlans; m->n_vlans = n_vlans; m->out_port = out_port; m->out_vlan = out_vlan; /* Update ports. */ mirror_bit = MIRROR_MASK_C(1) << m->idx; HMAP_FOR_EACH (port, hmap_node, &m->bridge->ports) { if (sset_contains(&m->src_ports, port->name)) { port->src_mirrors |= mirror_bit; } else { port->src_mirrors &= ~mirror_bit; } if (sset_contains(&m->dst_ports, port->name)) { port->dst_mirrors |= mirror_bit; } else { port->dst_mirrors &= ~mirror_bit; } } /* Clean up. */ sset_destroy(&src_ports); sset_destroy(&dst_ports); }