X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=switch%2Fdatapath.c;h=e05365ccaeaae24f7bbd2b71a39680cfff45165d;hb=8d19e7aebf933bce8f9d27477877ac783a7eda15;hp=5a0e14c490a69e3ba60a0b7e28cd10384a6f8516;hpb=23e054dcb699c58cc142cee1920972da02211341;p=sliver-openvswitch.git diff --git a/switch/datapath.c b/switch/datapath.c index 5a0e14c49..e05365cca 100644 --- a/switch/datapath.c +++ b/switch/datapath.c @@ -38,28 +38,43 @@ #include #include #include -#include "buffer.h" #include "chain.h" +#include "csum.h" #include "flow.h" +#include "list.h" #include "netdev.h" +#include "ofpbuf.h" +#include "openflow/openflow.h" #include "packets.h" #include "poll-loop.h" #include "rconn.h" -#include "vconn.h" +#include "stp.h" +#include "switch-flow.h" #include "table.h" +#include "timeval.h" +#include "vconn.h" #include "xtoxll.h" +#include "dp_act.h" #define THIS_MODULE VLM_datapath #include "vlog.h" -#define BRIDGE_PORT_NO_FLOOD 0x00000001 +extern char mfr_desc; +extern char hw_desc; +extern char sw_desc; +extern char serial_num; /* Capabilities supported by this implementation. */ -#define OFP_SUPPORTED_CAPABILITIES (OFPC_MULTI_PHY_TX) +#define OFP_SUPPORTED_CAPABILITIES ( OFPC_FLOW_STATS \ + | OFPC_TABLE_STATS \ + | OFPC_PORT_STATS \ + | OFPC_MULTI_PHY_TX ) /* Actions supported by this implementation. */ #define OFP_SUPPORTED_ACTIONS ( (1 << OFPAT_OUTPUT) \ - | (1 << OFPAT_SET_DL_VLAN) \ + | (1 << OFPAT_SET_VLAN_VID) \ + | (1 << OFPAT_SET_VLAN_PCP) \ + | (1 << OFPAT_STRIP_VLAN) \ | (1 << OFPAT_SET_DL_SRC) \ | (1 << OFPAT_SET_DL_DST) \ | (1 << OFPAT_SET_NW_SRC) \ @@ -68,11 +83,14 @@ | (1 << OFPAT_SET_TP_DST) ) struct sw_port { - uint32_t flags; + uint32_t config; /* Some subset of OFPPC_* flags. */ + uint32_t state; /* Some subset of OFPPS_* flags. */ struct datapath *dp; struct netdev *netdev; struct list node; /* Element in datapath.ports. */ - unsigned long long int rx_count, tx_count, drop_count; + unsigned long long int rx_packets, tx_packets; + unsigned long long int rx_bytes, tx_bytes; + unsigned long long int tx_dropped; }; /* The origin of a received OpenFlow message, to enable sending a reply. */ @@ -85,6 +103,8 @@ struct sender { struct remote { struct list node; struct rconn *rconn; +#define TXQ_LIMIT 128 /* Max number of packets to queue for tx. */ + int n_txq; /* Number of packets queued for tx on rconn. */ /* Support for reliable, multi-message replies to requests. * @@ -96,11 +116,14 @@ struct remote { void *cb_aux; }; +#define DP_MAX_PORTS 255 +BUILD_ASSERT_DECL(DP_MAX_PORTS <= OFPP_MAX); + struct datapath { /* Remote connections. */ struct remote *controller; /* Connection to controller. */ struct list remotes; /* All connections (including controller). */ - struct vconn *listen_vconn; + struct pvconn *listen_pvconn; time_t last_timeout; @@ -109,35 +132,28 @@ struct datapath { struct sw_chain *chain; /* Forwarding rules. */ - struct ofp_switch_config config; + /* Configuration set from controller. */ + uint16_t flags; + uint16_t miss_send_len; /* Switch ports. */ - struct sw_port ports[OFPP_MAX]; + struct sw_port ports[DP_MAX_PORTS]; struct list port_list; /* List of ports, for flooding. */ }; +static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(60, 60); + static struct remote *remote_create(struct datapath *, struct rconn *); static void remote_run(struct datapath *, struct remote *); static void remote_wait(struct remote *); static void remote_destroy(struct remote *); -void dp_output_port(struct datapath *, struct buffer *, - int in_port, int out_port); -void dp_update_port_flags(struct datapath *dp, const struct ofp_phy_port *opp); -void dp_output_control(struct datapath *, struct buffer *, int in_port, - size_t max_len, int reason); -static void send_flow_expired(struct datapath *, struct sw_flow *); +void dp_update_port_flags(struct datapath *dp, const struct ofp_port_mod *opm); +static void send_flow_expired(struct datapath *, struct sw_flow *, + enum ofp_flow_expired_reason); +static int update_port_status(struct sw_port *p); static void send_port_status(struct sw_port *p, uint8_t status); static void del_switch_port(struct sw_port *p); -static void execute_actions(struct datapath *, struct buffer *, - int in_port, const struct sw_flow_key *, - const struct ofp_action *, int n_actions); -static void modify_vlan(struct buffer *buffer, const struct sw_flow_key *key, - const struct ofp_action *a); -static void modify_nh(struct buffer *buffer, uint16_t eth_proto, - uint8_t nw_proto, const struct ofp_action *a); -static void modify_th(struct buffer *buffer, uint16_t eth_proto, - uint8_t nw_proto, const struct ofp_action *a); /* Buffers are identified to userspace by a 31-bit opaque ID. We divide the ID * into a buffer number (low bits) and a cookie (high bits). The buffer number @@ -150,12 +166,14 @@ static void modify_th(struct buffer *buffer, uint16_t eth_proto, #define PKT_COOKIE_BITS (32 - PKT_BUFFER_BITS) -void fwd_port_input(struct datapath *, struct buffer *, int in_port); +int run_flow_through_tables(struct datapath *, struct ofpbuf *, + struct sw_port *); +void fwd_port_input(struct datapath *, struct ofpbuf *, struct sw_port *); int fwd_control_input(struct datapath *, const struct sender *, const void *, size_t); -uint32_t save_buffer(struct buffer *); -static struct buffer *retrieve_buffer(uint32_t id); +uint32_t save_buffer(struct ofpbuf *); +static struct ofpbuf *retrieve_buffer(uint32_t id); static void discard_buffer(uint32_t id); static int port_no(struct datapath *dp, struct sw_port *p) @@ -164,24 +182,13 @@ static int port_no(struct datapath *dp, struct sw_port *p) return p - dp->ports; } -/* Generates a unique datapath id. It incorporates the datapath index - * and a hardware address, if available. If not, it generates a random - * one. - */ +/* Generates and returns a random datapath id. */ static uint64_t gen_datapath_id(void) { - /* Choose a random datapath id. */ - uint64_t id = 0; - int i; - - srand(time(0)); - - for (i = 0; i < ETH_ADDR_LEN; i++) { - id |= (uint64_t)(rand() & 0xff) << (8*(ETH_ADDR_LEN-1 - i)); - } - - return id; + uint8_t ea[ETH_ADDR_LEN]; + eth_addr_random(ea); + return eth_addr_to_uint64(ea); } int @@ -194,10 +201,10 @@ dp_new(struct datapath **dp_, uint64_t dpid, struct rconn *rconn) return ENOMEM; } - dp->last_timeout = time(0); + dp->last_timeout = time_now(); list_init(&dp->remotes); dp->controller = remote_create(dp, rconn); - dp->listen_vconn = NULL; + dp->listen_pvconn = NULL; dp->id = dpid <= UINT64_C(0xffffffffffff) ? dpid : gen_datapath_id(); dp->chain = chain_create(); if (!dp->chain) { @@ -207,8 +214,8 @@ dp_new(struct datapath **dp_, uint64_t dpid, struct rconn *rconn) } list_init(&dp->port_list); - dp->config.flags = 0; - dp->config.miss_send_len = htons(OFP_DEFAULT_MISS_SEND_LEN); + dp->flags = 0; + dp->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN; *dp_ = dp; return 0; } @@ -222,13 +229,13 @@ dp_add_port(struct datapath *dp, const char *name) struct sw_port *p; int error; - error = netdev_open(name, &netdev); + error = netdev_open(name, NETDEV_ETH_TYPE_ANY, &netdev); if (error) { return error; } - error = netdev_set_flags(netdev, NETDEV_UP | NETDEV_PROMISC); + error = netdev_set_flags(netdev, NETDEV_UP | NETDEV_PROMISC, false); if (error) { - VLOG_ERR("Couldn't set promiscuous mode on %s device", name); + VLOG_ERR("couldn't set promiscuous mode on %s device", name); netdev_close(netdev); return error; } @@ -249,11 +256,10 @@ dp_add_port(struct datapath *dp, const char *name) } } + memset(p, '\0', sizeof *p); + p->dp = dp; p->netdev = netdev; - p->tx_count = 0; - p->rx_count = 0; - p->drop_count = 0; list_push_back(&dp->port_list, &p->node); /* Notify the ctlpath that this port has been added */ @@ -263,27 +269,33 @@ dp_add_port(struct datapath *dp, const char *name) } void -dp_add_listen_vconn(struct datapath *dp, struct vconn *listen_vconn) +dp_add_listen_pvconn(struct datapath *dp, struct pvconn *listen_pvconn) { - assert(!dp->listen_vconn); - dp->listen_vconn = listen_vconn; + assert(!dp->listen_pvconn); + dp->listen_pvconn = listen_pvconn; } void dp_run(struct datapath *dp) { - time_t now = time(0); + time_t now = time_now(); struct sw_port *p, *pn; struct remote *r, *rn; - struct buffer *buffer = NULL; + struct ofpbuf *buffer = NULL; if (now != dp->last_timeout) { struct list deleted = LIST_INITIALIZER(&deleted); struct sw_flow *f, *n; + LIST_FOR_EACH (p, struct sw_port, node, &dp->port_list) { + if (update_port_status(p)) { + send_port_status(p, OFPPR_MODIFY); + } + } + chain_timeout(dp->chain, &deleted); LIST_FOR_EACH_SAFE (f, n, struct sw_flow, node, &deleted) { - send_flow_expired(dp, f); + send_flow_expired(dp, f, f->reason); list_remove(&f->node); flow_free(f); } @@ -301,39 +313,39 @@ dp_run(struct datapath *dp) const int headroom = 128 + 2; const int hard_header = VLAN_ETH_HEADER_LEN; const int mtu = netdev_get_mtu(p->netdev); - buffer = buffer_new(headroom + hard_header + mtu); - buffer->data += headroom; + buffer = ofpbuf_new(headroom + hard_header + mtu); + buffer->data = (char*)buffer->data + headroom; } error = netdev_recv(p->netdev, buffer); if (!error) { - p->rx_count++; - fwd_port_input(dp, buffer, port_no(dp, p)); + p->rx_packets++; + p->rx_bytes += buffer->size; + fwd_port_input(dp, buffer, p); buffer = NULL; } else if (error != EAGAIN) { - VLOG_ERR("Error receiving data from %s: %s", - netdev_get_name(p->netdev), strerror(error)); - del_switch_port(p); + VLOG_ERR_RL(&rl, "error receiving data from %s: %s", + netdev_get_name(p->netdev), strerror(error)); } } - buffer_delete(buffer); + ofpbuf_delete(buffer); /* Talk to remotes. */ LIST_FOR_EACH_SAFE (r, rn, struct remote, node, &dp->remotes) { remote_run(dp, r); } - if (dp->listen_vconn) { + if (dp->listen_pvconn) { for (;;) { struct vconn *new_vconn; int retval; - retval = vconn_accept(dp->listen_vconn, &new_vconn); + retval = pvconn_accept(dp->listen_pvconn, OFP_VERSION, &new_vconn); if (retval) { if (retval != EAGAIN) { - VLOG_WARN("accept failed (%s)", strerror(retval)); + VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); } break; } - remote_create(dp, rconn_new_from_vconn("passive", 128, new_vconn)); + remote_create(dp, rconn_new_from_vconn("passive", new_vconn)); } } } @@ -349,7 +361,7 @@ remote_run(struct datapath *dp, struct remote *r) * other processing doesn't starve. */ for (i = 0; i < 50; i++) { if (!r->cb_dump) { - struct buffer *buffer; + struct ofpbuf *buffer; struct ofp_header *oh; buffer = rconn_recv(r->rconn); @@ -365,15 +377,16 @@ remote_run(struct datapath *dp, struct remote *r) sender.xid = oh->xid; fwd_control_input(dp, &sender, buffer->data, buffer->size); } else { - VLOG_WARN("received too-short OpenFlow message"); + VLOG_WARN_RL(&rl, "received too-short OpenFlow message"); } - buffer_delete(buffer); + ofpbuf_delete(buffer); } else { - if (!rconn_is_full(r->rconn)) { + if (r->n_txq < TXQ_LIMIT) { int error = r->cb_dump(dp, r->cb_aux); if (error <= 0) { if (error) { - VLOG_WARN("dump callback error: %s", strerror(-error)); + VLOG_WARN_RL(&rl, "dump callback error: %s", + strerror(-error)); } r->cb_done(r->cb_aux); r->cb_dump = NULL; @@ -416,6 +429,7 @@ remote_create(struct datapath *dp, struct rconn *rconn) list_push_back(&dp->remotes, &remote->node); remote->rconn = rconn; remote->cb_dump = NULL; + remote->n_txq = 0; return remote; } @@ -457,8 +471,8 @@ dp_wait(struct datapath *dp) LIST_FOR_EACH (r, struct remote, node, &dp->remotes) { remote_wait(r); } - if (dp->listen_vconn) { - vconn_accept_wait(dp->listen_vconn); + if (dp->listen_pvconn) { + pvconn_wait(dp->listen_pvconn); } } @@ -492,7 +506,7 @@ dp_destroy(struct datapath *dp) * "flood" argument is set, don't send out ports with flooding disabled. */ static int -output_all(struct datapath *dp, struct buffer *buffer, int in_port, int flood) +output_all(struct datapath *dp, struct ofpbuf *buffer, int in_port, int flood) { struct sw_port *p; int prev_port; @@ -502,47 +516,48 @@ output_all(struct datapath *dp, struct buffer *buffer, int in_port, int flood) if (port_no(dp, p) == in_port) { continue; } - if (flood && p->flags & BRIDGE_PORT_NO_FLOOD) { + if (flood && p->config & OFPPC_NO_FLOOD) { continue; } if (prev_port != -1) { - dp_output_port(dp, buffer_clone(buffer), in_port, prev_port); + dp_output_port(dp, ofpbuf_clone(buffer), in_port, prev_port, + false); } prev_port = port_no(dp, p); } if (prev_port != -1) - dp_output_port(dp, buffer, in_port, prev_port); + dp_output_port(dp, buffer, in_port, prev_port, false); else - buffer_delete(buffer); + ofpbuf_delete(buffer); return 0; } void -output_packet(struct datapath *dp, struct buffer *buffer, int out_port) +output_packet(struct datapath *dp, struct ofpbuf *buffer, int out_port) { - if (out_port >= 0 && out_port < OFPP_MAX) { + if (out_port >= 0 && out_port < DP_MAX_PORTS) { struct sw_port *p = &dp->ports[out_port]; - if (p->netdev != NULL) { + if (p->netdev != NULL && !(p->config & OFPPC_PORT_DOWN)) { if (!netdev_send(p->netdev, buffer)) { - p->tx_count++; + p->tx_packets++; + p->tx_bytes += buffer->size; } else { - p->drop_count++; + p->tx_dropped++; } return; } } - buffer_delete(buffer); - /* FIXME: ratelimit */ - VLOG_DBG("can't forward to bad port %d\n", out_port); + ofpbuf_delete(buffer); + VLOG_DBG_RL(&rl, "can't forward to bad port %d\n", out_port); } /* Takes ownership of 'buffer' and transmits it to 'out_port' on 'dp'. */ void -dp_output_port(struct datapath *dp, struct buffer *buffer, - int in_port, int out_port) +dp_output_port(struct datapath *dp, struct ofpbuf *buffer, + int in_port, int out_port, bool ignore_no_fwd) { assert(buffer); @@ -552,56 +567,43 @@ dp_output_port(struct datapath *dp, struct buffer *buffer, output_all(dp, buffer, in_port, 0); } else if (out_port == OFPP_CONTROLLER) { dp_output_control(dp, buffer, in_port, 0, OFPR_ACTION); + } else if (out_port == OFPP_IN_PORT) { + output_packet(dp, buffer, in_port); } else if (out_port == OFPP_TABLE) { - struct sw_flow_key key; - struct sw_flow *flow; - - key.wildcards = 0; - flow_extract(buffer, in_port, &key.flow); - flow = chain_lookup(dp->chain, &key); - if (flow != NULL) { - flow_used(flow, buffer); - execute_actions(dp, buffer, in_port, &key, - flow->actions, flow->n_actions); + struct sw_port *p = in_port < DP_MAX_PORTS ? &dp->ports[in_port] : 0; + if (run_flow_through_tables(dp, buffer, p)) { + ofpbuf_delete(buffer); } } else { + if (in_port == out_port) { + VLOG_DBG_RL(&rl, "can't directly forward to input port"); + return; + } output_packet(dp, buffer, out_port); } } static void * -alloc_openflow_buffer(struct datapath *dp, size_t openflow_len, uint8_t type, - const struct sender *sender, struct buffer **bufferp) +make_openflow_reply(size_t openflow_len, uint8_t type, + const struct sender *sender, struct ofpbuf **bufferp) { - struct buffer *buffer; - struct ofp_header *oh; - - buffer = *bufferp = buffer_new(openflow_len); - oh = buffer_put_uninit(buffer, openflow_len); - oh->version = OFP_VERSION; - oh->type = type; - oh->length = 0; /* Filled in by send_openflow_buffer(). */ - oh->xid = sender ? sender->xid : 0; - return oh; + return make_openflow_xid(openflow_len, type, sender ? sender->xid : 0, + bufferp); } static int -send_openflow_buffer(struct datapath *dp, struct buffer *buffer, +send_openflow_buffer(struct datapath *dp, struct ofpbuf *buffer, const struct sender *sender) { struct remote *remote = sender ? sender->remote : dp->controller; struct rconn *rconn = remote->rconn; - struct ofp_header *oh; int retval; - oh = buffer_at_assert(buffer, 0, sizeof *oh); - oh->length = htons(buffer->size); - - retval = rconn_send(rconn, buffer); + update_openflow_length(buffer); + retval = rconn_send_with_limit(rconn, buffer, &remote->n_txq, TXQ_LIMIT); if (retval) { - VLOG_WARN("send to %s failed: %s", - rconn_get_name(rconn), strerror(retval)); - buffer_delete(buffer); + VLOG_WARN_RL(&rl, "send to %s failed: %s", + rconn_get_name(rconn), strerror(retval)); } return retval; } @@ -613,7 +615,7 @@ send_openflow_buffer(struct datapath *dp, struct buffer *buffer, * the caller wants to be sent; a value of 0 indicates the entire packet should * be sent. */ void -dp_output_control(struct datapath *dp, struct buffer *buffer, int in_port, +dp_output_control(struct datapath *dp, struct ofpbuf *buffer, int in_port, size_t max_len, int reason) { struct ofp_packet_in *opi; @@ -622,11 +624,11 @@ dp_output_control(struct datapath *dp, struct buffer *buffer, int in_port, buffer_id = save_buffer(buffer); total_len = buffer->size; - if (buffer_id != UINT32_MAX && buffer->size > max_len) { + if (buffer_id != UINT32_MAX && max_len && buffer->size > max_len) { buffer->size = max_len; } - opi = buffer_push_uninit(buffer, offsetof(struct ofp_packet_in, data)); + opi = ofpbuf_push_uninit(buffer, offsetof(struct ofp_packet_in, data)); opi->header.version = OFP_VERSION; opi->header.type = OFPT_PACKET_IN; opi->header.length = htons(buffer->size); @@ -647,59 +649,115 @@ static void fill_port_desc(struct datapath *dp, struct sw_port *p, sizeof desc->name); desc->name[sizeof desc->name - 1] = '\0'; memcpy(desc->hw_addr, netdev_get_etheraddr(p->netdev), ETH_ADDR_LEN); - desc->flags = htonl(p->flags); - desc->features = htonl(netdev_get_features(p->netdev)); - desc->speed = htonl(netdev_get_speed(p->netdev)); + desc->config = htonl(p->config); + desc->state = htonl(p->state); + desc->curr = htonl(netdev_get_features(p->netdev, NETDEV_FEAT_CURRENT)); + desc->supported = htonl(netdev_get_features(p->netdev, + NETDEV_FEAT_SUPPORTED)); + desc->advertised = htonl(netdev_get_features(p->netdev, + NETDEV_FEAT_ADVERTISED)); + desc->peer = htonl(netdev_get_features(p->netdev, NETDEV_FEAT_PEER)); } static void dp_send_features_reply(struct datapath *dp, const struct sender *sender) { - struct buffer *buffer; + struct ofpbuf *buffer; struct ofp_switch_features *ofr; struct sw_port *p; - ofr = alloc_openflow_buffer(dp, sizeof *ofr, OFPT_FEATURES_REPLY, - sender, &buffer); - ofr->datapath_id = htonll(dp->id); - ofr->n_exact = htonl(2 * TABLE_HASH_MAX_FLOWS); - ofr->n_compression = 0; /* Not supported */ - ofr->n_general = htonl(TABLE_LINEAR_MAX_FLOWS); - ofr->buffer_mb = htonl(UINT32_MAX); - ofr->n_buffers = htonl(N_PKT_BUFFERS); - ofr->capabilities = htonl(OFP_SUPPORTED_CAPABILITIES); - ofr->actions = htonl(OFP_SUPPORTED_ACTIONS); + ofr = make_openflow_reply(sizeof *ofr, OFPT_FEATURES_REPLY, + sender, &buffer); + ofr->datapath_id = htonll(dp->id); + ofr->n_tables = dp->chain->n_tables; + ofr->n_buffers = htonl(N_PKT_BUFFERS); + ofr->capabilities = htonl(OFP_SUPPORTED_CAPABILITIES); + ofr->actions = htonl(OFP_SUPPORTED_ACTIONS); LIST_FOR_EACH (p, struct sw_port, node, &dp->port_list) { - struct ofp_phy_port *opp = buffer_put_uninit(buffer, sizeof *opp); - memset(opp, 0, sizeof *opp); + struct ofp_phy_port *opp = ofpbuf_put_zeros(buffer, sizeof *opp); fill_port_desc(dp, p, opp); } send_openflow_buffer(dp, buffer, sender); } void -dp_update_port_flags(struct datapath *dp, const struct ofp_phy_port *opp) +dp_update_port_flags(struct datapath *dp, const struct ofp_port_mod *opm) { - int port_no = ntohs(opp->port_no); - if (port_no < OFPP_MAX) { + int port_no = ntohs(opm->port_no); + if (port_no < DP_MAX_PORTS) { struct sw_port *p = &dp->ports[port_no]; /* Make sure the port id hasn't changed since this was sent */ - if (!p || memcmp(opp->hw_addr, netdev_get_etheraddr(p->netdev), + if (memcmp(opm->hw_addr, netdev_get_etheraddr(p->netdev), ETH_ADDR_LEN) != 0) { return; } - p->flags = htonl(opp->flags); + + + if (opm->mask) { + uint32_t config_mask = ntohl(opm->mask); + p->config &= ~config_mask; + p->config |= ntohl(opm->config) & config_mask; + } + + if (opm->mask & htonl(OFPPC_PORT_DOWN)) { + if ((opm->config & htonl(OFPPC_PORT_DOWN)) + && (p->config & OFPPC_PORT_DOWN) == 0) { + p->config |= OFPPC_PORT_DOWN; + netdev_turn_flags_off(p->netdev, NETDEV_UP, true); + } else if ((opm->config & htonl(OFPPC_PORT_DOWN)) == 0 + && (p->config & OFPPC_PORT_DOWN)) { + p->config &= ~OFPPC_PORT_DOWN; + netdev_turn_flags_on(p->netdev, NETDEV_UP, true); + } + } + } +} + +/* Update the port status field of the bridge port. A non-zero return + * value indicates some field has changed. + * + * NB: Callers of this function may hold the RCU read lock, so any + * additional checks must not sleep. + */ +static int +update_port_status(struct sw_port *p) +{ + int retval; + enum netdev_flags flags; + uint32_t orig_config = p->config; + uint32_t orig_state = p->state; + + if (netdev_get_flags(p->netdev, &flags) < 0) { + VLOG_WARN_RL(&rl, "could not get netdev flags for %s", + netdev_get_name(p->netdev)); + return 0; + } else { + if (flags & NETDEV_UP) { + p->config &= ~OFPPC_PORT_DOWN; + } else { + p->config |= OFPPC_PORT_DOWN; + } } + + /* Not all cards support this getting link status, so don't warn on + * error. */ + retval = netdev_get_link_status(p->netdev); + if (retval == 1) { + p->state &= ~OFPPS_LINK_DOWN; + } else if (retval == 0) { + p->state |= OFPPS_LINK_DOWN; + } + + return ((orig_config != p->config) || (orig_state != p->state)); } static void send_port_status(struct sw_port *p, uint8_t status) { - struct buffer *buffer; + struct ofpbuf *buffer; struct ofp_port_status *ops; - ops = alloc_openflow_buffer(p->dp, sizeof *ops, OFPT_PORT_STATUS, NULL, - &buffer); + ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &buffer); ops->reason = status; memset(ops->pad, 0, sizeof ops->pad); fill_port_desc(p->dp, p, &ops->desc); @@ -708,18 +766,20 @@ send_port_status(struct sw_port *p, uint8_t status) } void -send_flow_expired(struct datapath *dp, struct sw_flow *flow) +send_flow_expired(struct datapath *dp, struct sw_flow *flow, + enum ofp_flow_expired_reason reason) { - struct buffer *buffer; + struct ofpbuf *buffer; struct ofp_flow_expired *ofe; - ofe = alloc_openflow_buffer(dp, sizeof *ofe, OFPT_FLOW_EXPIRED, NULL, - &buffer); + ofe = make_openflow_xid(sizeof *ofe, OFPT_FLOW_EXPIRED, 0, &buffer); flow_fill_match(&ofe->match, &flow->key); - memset(ofe->pad, 0, sizeof ofe->pad); ofe->priority = htons(flow->priority); + ofe->reason = reason; + memset(ofe->pad, 0, sizeof ofe->pad); - ofe->duration = htonl(flow->timeout - flow->max_idle - flow->created); + ofe->duration = htonl(time_now() - flow->created); + memset(ofe->pad2, 0, sizeof ofe->pad2); ofe->packet_count = htonll(flow->packet_count); ofe->byte_count = htonll(flow->byte_count); send_openflow_buffer(dp, buffer, NULL); @@ -727,12 +787,11 @@ send_flow_expired(struct datapath *dp, struct sw_flow *flow) void dp_send_error_msg(struct datapath *dp, const struct sender *sender, - uint16_t type, uint16_t code, const uint8_t *data, size_t len) + uint16_t type, uint16_t code, const void *data, size_t len) { - struct buffer *buffer; + struct ofpbuf *buffer; struct ofp_error_msg *oem; - oem = alloc_openflow_buffer(dp, sizeof(*oem)+len, OFPT_ERROR_MSG, - sender, &buffer); + oem = make_openflow_reply(sizeof(*oem)+len, OFPT_ERROR, sender, &buffer); oem->type = htons(type); oem->code = htons(code); memcpy(oem->data, data, len); @@ -740,16 +799,15 @@ dp_send_error_msg(struct datapath *dp, const struct sender *sender, } static void -fill_flow_stats(struct buffer *buffer, struct sw_flow *flow, +fill_flow_stats(struct ofpbuf *buffer, struct sw_flow *flow, int table_idx, time_t now) { struct ofp_flow_stats *ofs; - int length = sizeof *ofs + sizeof *ofs->actions * flow->n_actions; - ofs = buffer_put_uninit(buffer, length); + int length = sizeof *ofs + flow->sf_acts->actions_len; + ofs = ofpbuf_put_zeros(buffer, length); ofs->length = htons(length); ofs->table_id = table_idx; - ofs->pad = 0; - ofs->match.wildcards = htons(flow->key.wildcards); + ofs->match.wildcards = htonl(flow->key.wildcards); ofs->match.in_port = flow->key.flow.in_port; memcpy(ofs->match.dl_src, flow->key.flow.dl_src, ETH_ADDR_LEN); memcpy(ofs->match.dl_dst, flow->key.flow.dl_dst, ETH_ADDR_LEN); @@ -758,232 +816,62 @@ fill_flow_stats(struct buffer *buffer, struct sw_flow *flow, ofs->match.nw_src = flow->key.flow.nw_src; ofs->match.nw_dst = flow->key.flow.nw_dst; ofs->match.nw_proto = flow->key.flow.nw_proto; - memset(ofs->match.pad, 0, sizeof ofs->match.pad); ofs->match.tp_src = flow->key.flow.tp_src; ofs->match.tp_dst = flow->key.flow.tp_dst; ofs->duration = htonl(now - flow->created); + ofs->priority = htons(flow->priority); + ofs->idle_timeout = htons(flow->idle_timeout); + ofs->hard_timeout = htons(flow->hard_timeout); ofs->packet_count = htonll(flow->packet_count); ofs->byte_count = htonll(flow->byte_count); - ofs->priority = htons(flow->priority); - ofs->max_idle = htons(flow->max_idle); - memcpy(ofs->actions, flow->actions, - sizeof *ofs->actions * flow->n_actions); + memcpy(ofs->actions, flow->sf_acts->actions, flow->sf_acts->actions_len); } -/* 'buffer' was received on 'in_port', a physical switch port between 0 and - * OFPP_MAX. Process it according to 'chain'. */ -void fwd_port_input(struct datapath *dp, struct buffer *buffer, int in_port) +/* 'buffer' was received on 'p', which may be a a physical switch port or a + * null pointer. Process it according to 'dp''s flow table. Returns 0 if + * successful, in which case 'buffer' is destroyed, or -ESRCH if there is no + * matching flow, in which case 'buffer' still belongs to the caller. */ +int run_flow_through_tables(struct datapath *dp, struct ofpbuf *buffer, + struct sw_port *p) { struct sw_flow_key key; struct sw_flow *flow; key.wildcards = 0; - flow_extract(buffer, in_port, &key.flow); + if (flow_extract(buffer, p ? port_no(dp, p) : OFPP_NONE, &key.flow) + && (dp->flags & OFPC_FRAG_MASK) == OFPC_FRAG_DROP) { + /* Drop fragment. */ + ofpbuf_delete(buffer); + return 0; + } + if (p && p->config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) + && p->config & (!eth_addr_equals(key.flow.dl_dst, stp_eth_addr) + ? OFPPC_NO_RECV : OFPPC_NO_RECV_STP)) { + ofpbuf_delete(buffer); + return 0; + } + flow = chain_lookup(dp->chain, &key); if (flow != NULL) { flow_used(flow, buffer); - execute_actions(dp, buffer, in_port, &key, - flow->actions, flow->n_actions); + execute_actions(dp, buffer, &key, flow->sf_acts->actions, + flow->sf_acts->actions_len, false); + return 0; } else { - dp_output_control(dp, buffer, in_port, ntohs(dp->config.miss_send_len), - OFPR_NO_MATCH); + return -ESRCH; } } -static void -do_output(struct datapath *dp, struct buffer *buffer, int in_port, - size_t max_len, int out_port) +/* 'buffer' was received on 'p', which may be a a physical switch port or a + * null pointer. Process it according to 'dp''s flow table, sending it up to + * the controller if no flow matches. Takes ownership of 'buffer'. */ +void fwd_port_input(struct datapath *dp, struct ofpbuf *buffer, + struct sw_port *p) { - if (out_port != OFPP_CONTROLLER) { - dp_output_port(dp, buffer, in_port, out_port); - } else { - dp_output_control(dp, buffer, in_port, max_len, OFPR_ACTION); - } -} - -static void -execute_actions(struct datapath *dp, struct buffer *buffer, - int in_port, const struct sw_flow_key *key, - const struct ofp_action *actions, int n_actions) -{ - /* Every output action needs a separate clone of 'buffer', but the common - * case is just a single output action, so that doing a clone and then - * freeing the original buffer is wasteful. So the following code is - * slightly obscure just to avoid that. */ - int prev_port; - size_t max_len=0; /* Initialze to make compiler happy */ - uint16_t eth_proto; - int i; - - prev_port = -1; - eth_proto = ntohs(key->flow.dl_type); - - for (i = 0; i < n_actions; i++) { - const struct ofp_action *a = &actions[i]; - struct eth_header *eh = buffer->l2; - - if (prev_port != -1) { - do_output(dp, buffer_clone(buffer), in_port, max_len, prev_port); - prev_port = -1; - } - - switch (ntohs(a->type)) { - case OFPAT_OUTPUT: - prev_port = ntohs(a->arg.output.port); - max_len = ntohs(a->arg.output.max_len); - break; - - case OFPAT_SET_DL_VLAN: - modify_vlan(buffer, key, a); - break; - - case OFPAT_SET_DL_SRC: - memcpy(eh->eth_src, a->arg.dl_addr, sizeof eh->eth_src); - break; - - case OFPAT_SET_DL_DST: - memcpy(eh->eth_dst, a->arg.dl_addr, sizeof eh->eth_dst); - break; - - case OFPAT_SET_NW_SRC: - case OFPAT_SET_NW_DST: - modify_nh(buffer, eth_proto, key->flow.nw_proto, a); - break; - - case OFPAT_SET_TP_SRC: - case OFPAT_SET_TP_DST: - modify_th(buffer, eth_proto, key->flow.nw_proto, a); - break; - - default: - NOT_REACHED(); - } - } - if (prev_port != -1) - do_output(dp, buffer, in_port, max_len, prev_port); - else - buffer_delete(buffer); -} - -/* Returns the new checksum for a packet in which the checksum field previously - * contained 'old_csum' and in which a field that contained 'old_u16' was - * changed to contain 'new_u16'. */ -static uint16_t -recalc_csum16(uint16_t old_csum, uint16_t old_u16, uint16_t new_u16) -{ - /* Ones-complement arithmetic is endian-independent, so this code does not - * use htons() or ntohs(). - * - * See RFC 1624 for formula and explanation. */ - uint16_t hc_complement = ~old_csum; - uint16_t m_complement = ~old_u16; - uint16_t m_prime = new_u16; - uint32_t sum = hc_complement + m_complement + m_prime; - uint16_t hc_prime_complement = sum + (sum >> 16); - return ~hc_prime_complement; -} - -/* Returns the new checksum for a packet in which the checksum field previously - * contained 'old_csum' and in which a field that contained 'old_u32' was - * changed to contain 'new_u32'. */ -static uint16_t -recalc_csum32(uint16_t old_csum, uint32_t old_u32, uint32_t new_u32) -{ - return recalc_csum16(recalc_csum16(old_csum, old_u32, new_u32), - old_u32 >> 16, new_u32 >> 16); -} - -static void modify_nh(struct buffer *buffer, uint16_t eth_proto, - uint8_t nw_proto, const struct ofp_action *a) -{ - if (eth_proto == ETH_TYPE_IP) { - struct ip_header *nh = buffer->l3; - uint32_t new, *field; - - new = a->arg.nw_addr; - field = a->type == OFPAT_SET_NW_SRC ? &nh->ip_src : &nh->ip_dst; - if (nw_proto == IP_TYPE_TCP) { - struct tcp_header *th = buffer->l4; - th->tcp_csum = recalc_csum32(th->tcp_csum, *field, new); - } else if (nw_proto == IP_TYPE_UDP) { - struct udp_header *th = buffer->l4; - if (th->udp_csum) { - th->udp_csum = recalc_csum32(th->udp_csum, *field, new); - if (!th->udp_csum) { - th->udp_csum = 0xffff; - } - } - } - nh->ip_csum = recalc_csum32(nh->ip_csum, *field, new); - *field = new; - } -} - -static void modify_th(struct buffer *buffer, uint16_t eth_proto, - uint8_t nw_proto, const struct ofp_action *a) -{ - if (eth_proto == ETH_TYPE_IP) { - uint16_t new, *field; - - new = a->arg.tp; - - if (nw_proto == IP_TYPE_TCP) { - struct tcp_header *th = buffer->l4; - field = a->type == OFPAT_SET_TP_SRC ? &th->tcp_src : &th->tcp_dst; - th->tcp_csum = recalc_csum16(th->tcp_csum, *field, new); - *field = new; - } else if (nw_proto == IP_TYPE_UDP) { - struct udp_header *th = buffer->l4; - field = a->type == OFPAT_SET_TP_SRC ? &th->udp_src : &th->udp_dst; - th->udp_csum = recalc_csum16(th->udp_csum, *field, new); - *field = new; - } - } -} - -static void -modify_vlan(struct buffer *buffer, - const struct sw_flow_key *key, const struct ofp_action *a) -{ - uint16_t new_id = a->arg.vlan_id; - struct vlan_eth_header *veh; - - if (new_id != OFP_VLAN_NONE) { - if (key->flow.dl_vlan != htons(OFP_VLAN_NONE)) { - /* Modify vlan id, but maintain other TCI values */ - veh = buffer->l2; - veh->veth_tci &= ~htons(VLAN_VID); - veh->veth_tci |= htons(new_id); - } else { - /* Insert new vlan id. */ - struct eth_header *eh = buffer->l2; - struct vlan_eth_header tmp; - memcpy(tmp.veth_dst, eh->eth_dst, ETH_ADDR_LEN); - memcpy(tmp.veth_src, eh->eth_src, ETH_ADDR_LEN); - tmp.veth_type = htons(ETH_TYPE_VLAN); - tmp.veth_tci = new_id; - tmp.veth_next_type = eh->eth_type; - - veh = buffer_push_uninit(buffer, VLAN_HEADER_LEN); - memcpy(veh, &tmp, sizeof tmp); - buffer->l2 -= VLAN_HEADER_LEN; - } - } else { - /* Remove an existing vlan header if it exists */ - veh = buffer->l2; - if (veh->veth_type == htons(ETH_TYPE_VLAN)) { - struct eth_header tmp; - - memcpy(tmp.eth_dst, veh->veth_dst, ETH_ADDR_LEN); - memcpy(tmp.eth_src, veh->veth_src, ETH_ADDR_LEN); - tmp.eth_type = veh->veth_next_type; - - buffer->size -= VLAN_HEADER_LEN; - buffer->data += VLAN_HEADER_LEN; - buffer->l2 += VLAN_HEADER_LEN; - memcpy(buffer->data, &tmp, sizeof tmp); - } + if (run_flow_through_tables(dp, buffer, p)) { + dp_output_control(dp, buffer, port_no(dp, p), + dp->miss_send_len, OFPR_NO_MATCH); } } @@ -999,16 +887,14 @@ static int recv_get_config_request(struct datapath *dp, const struct sender *sender, const void *msg) { - struct buffer *buffer; + struct ofpbuf *buffer; struct ofp_switch_config *osc; - osc = alloc_openflow_buffer(dp, sizeof *osc, OFPT_GET_CONFIG_REPLY, - sender, &buffer); + osc = make_openflow_reply(sizeof *osc, OFPT_GET_CONFIG_REPLY, + sender, &buffer); - assert(sizeof *osc == sizeof dp->config); - memcpy(((char *)osc) + sizeof osc->header, - ((char *)&dp->config) + sizeof dp->config.header, - sizeof dp->config - sizeof dp->config.header); + osc->flags = htons(dp->flags); + osc->miss_send_len = htons(dp->miss_send_len); return send_openflow_buffer(dp, buffer, sender); } @@ -1018,40 +904,61 @@ recv_set_config(struct datapath *dp, const struct sender *sender UNUSED, const void *msg) { const struct ofp_switch_config *osc = msg; - dp->config = *osc; + int flags; + + flags = ntohs(osc->flags) & (OFPC_SEND_FLOW_EXP | OFPC_FRAG_MASK); + if ((flags & OFPC_FRAG_MASK) != OFPC_FRAG_NORMAL + && (flags & OFPC_FRAG_MASK) != OFPC_FRAG_DROP) { + flags = (flags & ~OFPC_FRAG_MASK) | OFPC_FRAG_DROP; + } + dp->flags = flags; + dp->miss_send_len = ntohs(osc->miss_send_len); return 0; } static int -recv_packet_out(struct datapath *dp, const struct sender *sender UNUSED, +recv_packet_out(struct datapath *dp, const struct sender *sender, const void *msg) { const struct ofp_packet_out *opo = msg; + struct sw_flow_key key; + uint16_t v_code; + struct ofpbuf *buffer; + size_t actions_len = ntohs(opo->actions_len); + + if (actions_len > (ntohs(opo->header.length) - sizeof *opo)) { + VLOG_DBG_RL(&rl, "message too short for number of actions"); + return -EINVAL; + } if (ntohl(opo->buffer_id) == (uint32_t) -1) { /* FIXME: can we avoid copying data here? */ - int data_len = ntohs(opo->header.length) - sizeof *opo; - struct buffer *buffer = buffer_new(data_len); - buffer_put(buffer, opo->u.data, data_len); - dp_output_port(dp, buffer, - ntohs(opo->in_port), ntohs(opo->out_port)); + int data_len = ntohs(opo->header.length) - sizeof *opo - actions_len; + buffer = ofpbuf_new(data_len); + ofpbuf_put(buffer, (uint8_t *)opo->actions + actions_len, data_len); } else { - struct sw_flow_key key; - struct buffer *buffer; - int n_acts; - buffer = retrieve_buffer(ntohl(opo->buffer_id)); if (!buffer) { return -ESRCH; } + } + + flow_extract(buffer, ntohs(opo->in_port), &key.flow); - n_acts = (ntohs(opo->header.length) - sizeof *opo) - / sizeof *opo->u.actions; - flow_extract(buffer, ntohs(opo->in_port), &key.flow); - execute_actions(dp, buffer, ntohs(opo->in_port), - &key, opo->u.actions, n_acts); + v_code = validate_actions(dp, &key, opo->actions, actions_len); + if (v_code != ACT_VALIDATION_OK) { + dp_send_error_msg(dp, sender, OFPET_BAD_ACTION, v_code, + msg, ntohs(opo->header.length)); + goto error; } + + execute_actions(dp, buffer, &key, opo->actions, actions_len, true); + return 0; + +error: + ofpbuf_delete(buffer); + return -EINVAL; } static int @@ -1060,64 +967,63 @@ recv_port_mod(struct datapath *dp, const struct sender *sender UNUSED, { const struct ofp_port_mod *opm = msg; - dp_update_port_flags(dp, &opm->desc); + dp_update_port_flags(dp, opm); return 0; } static int -add_flow(struct datapath *dp, const struct ofp_flow_mod *ofm) +add_flow(struct datapath *dp, const struct sender *sender, + const struct ofp_flow_mod *ofm) { int error = -ENOMEM; - int n_acts; - int i; - struct sw_flow *flow; - - - /* To prevent loops, make sure there's no action to send to the - * OFP_TABLE virtual port. - */ - n_acts = (ntohs(ofm->header.length) - sizeof *ofm) / sizeof *ofm->actions; - for (i=0; iactions[i]; - - if (a->type == htons(OFPAT_OUTPUT) - && a->arg.output.port == htons(OFPP_TABLE)) { - /* xxx Send fancy new error message? */ - goto error; - } - } + uint16_t v_code; + struct sw_flow *flow; + size_t actions_len = ntohs(ofm->header.length) - sizeof *ofm; /* Allocate memory. */ - flow = flow_alloc(n_acts); + flow = flow_alloc(actions_len); if (flow == NULL) goto error; - /* Fill out flow. */ flow_extract_match(&flow->key, &ofm->match); - flow->max_idle = ntohs(ofm->max_idle); + + v_code = validate_actions(dp, &flow->key, ofm->actions, actions_len); + if (v_code != ACT_VALIDATION_OK) { + dp_send_error_msg(dp, sender, OFPET_BAD_ACTION, v_code, + ofm, ntohs(ofm->header.length)); + goto error_free_flow; + } + + /* Fill out flow. */ flow->priority = flow->key.wildcards ? ntohs(ofm->priority) : -1; - flow->timeout = time(0) + flow->max_idle; /* FIXME */ - flow->n_actions = n_acts; - flow->created = time(0); /* FIXME */ + flow->idle_timeout = ntohs(ofm->idle_timeout); + flow->hard_timeout = ntohs(ofm->hard_timeout); + flow->used = flow->created = time_now(); + flow->sf_acts->actions_len = actions_len; flow->byte_count = 0; flow->packet_count = 0; - memcpy(flow->actions, ofm->actions, n_acts * sizeof *flow->actions); + memcpy(flow->sf_acts->actions, ofm->actions, actions_len); /* Act. */ error = chain_insert(dp->chain, flow); - if (error) { + if (error == -ENOBUFS) { + dp_send_error_msg(dp, sender, OFPET_FLOW_MOD_FAILED, + OFPFMFC_ALL_TABLES_FULL, ofm, ntohs(ofm->header.length)); + goto error_free_flow; + } else if (error) { goto error_free_flow; } error = 0; if (ntohl(ofm->buffer_id) != UINT32_MAX) { - struct buffer *buffer = retrieve_buffer(ntohl(ofm->buffer_id)); + struct ofpbuf *buffer = retrieve_buffer(ntohl(ofm->buffer_id)); if (buffer) { struct sw_flow_key key; uint16_t in_port = ntohs(ofm->match.in_port); flow_used(flow, buffer); flow_extract(buffer, in_port, &key.flow); - execute_actions(dp, buffer, in_port, &key, ofm->actions, n_acts); + execute_actions(dp, buffer, &key, + ofm->actions, actions_len, false); } else { error = -ESRCH; } @@ -1133,14 +1039,62 @@ error: } static int -recv_flow(struct datapath *dp, const struct sender *sender UNUSED, +mod_flow(struct datapath *dp, const struct sender *sender, + const struct ofp_flow_mod *ofm) +{ + int error = -ENOMEM; + uint16_t v_code; + size_t actions_len; + struct sw_flow_key key; + uint16_t priority; + int strict; + + flow_extract_match(&key, &ofm->match); + + actions_len = ntohs(ofm->header.length) - sizeof *ofm; + + v_code = validate_actions(dp, &key, ofm->actions, actions_len); + if (v_code != ACT_VALIDATION_OK) { + dp_send_error_msg(dp, sender, OFPET_BAD_ACTION, v_code, + ofm, ntohs(ofm->header.length)); + goto error; + } + + priority = key.wildcards ? ntohs(ofm->priority) : -1; + strict = (ofm->command == htons(OFPFC_MODIFY_STRICT)) ? 1 : 0; + chain_modify(dp->chain, &key, priority, strict, ofm->actions, actions_len); + + if (ntohl(ofm->buffer_id) != UINT32_MAX) { + struct ofpbuf *buffer = retrieve_buffer(ntohl(ofm->buffer_id)); + if (buffer) { + struct sw_flow_key skb_key; + uint16_t in_port = ntohs(ofm->match.in_port); + flow_extract(buffer, in_port, &skb_key.flow); + execute_actions(dp, buffer, &skb_key, + ofm->actions, actions_len, false); + } else { + error = -ESRCH; + } + } + return error; + +error: + if (ntohl(ofm->buffer_id) != (uint32_t) -1) + discard_buffer(ntohl(ofm->buffer_id)); + return error; +} + +static int +recv_flow(struct datapath *dp, const struct sender *sender, const void *msg) { const struct ofp_flow_mod *ofm = msg; uint16_t command = ntohs(ofm->command); if (command == OFPFC_ADD) { - return add_flow(dp, ofm); + return add_flow(dp, sender, ofm); + } else if ((command == OFPFC_MODIFY) || (command == OFPFC_MODIFY_STRICT)) { + return mod_flow(dp, sender, ofm); } else if (command == OFPFC_DELETE) { struct sw_flow_key key; flow_extract_match(&key, &ofm->match); @@ -1156,13 +1110,26 @@ recv_flow(struct datapath *dp, const struct sender *sender UNUSED, } } +static int desc_stats_dump(struct datapath *dp, void *state, + struct ofpbuf *buffer) +{ + struct ofp_desc_stats *ods = ofpbuf_put_zeros(buffer, sizeof *ods); + + strncpy(ods->mfr_desc, &mfr_desc, sizeof ods->mfr_desc); + strncpy(ods->hw_desc, &hw_desc, sizeof ods->hw_desc); + strncpy(ods->sw_desc, &sw_desc, sizeof ods->sw_desc); + strncpy(ods->serial_num, &serial_num, sizeof ods->serial_num); + + return 0; +} + struct flow_stats_state { int table_idx; struct sw_table_position position; struct ofp_flow_stats_request rq; time_t now; - struct buffer *buffer; + struct ofpbuf *buffer; }; #define MAX_FLOW_STATS_BYTES 4096 @@ -1187,14 +1154,14 @@ static int flow_stats_dump_callback(struct sw_flow *flow, void *private) } static int flow_stats_dump(struct datapath *dp, void *state, - struct buffer *buffer) + struct ofpbuf *buffer) { struct flow_stats_state *s = state; struct sw_flow_key match_key; flow_extract_match(&match_key, &s->rq.match); s->buffer = buffer; - s->now = time(0); + s->now = time_now(); while (s->table_idx < dp->chain->n_tables && (s->rq.table_id == 0xff || s->rq.table_id == s->table_idx)) { @@ -1240,7 +1207,7 @@ static int aggregate_stats_dump_callback(struct sw_flow *flow, void *private) } static int aggregate_stats_dump(struct datapath *dp, void *state, - struct buffer *buffer) + struct ofpbuf *buffer) { struct aggregate_stats_state *s = state; struct ofp_aggregate_stats_request *rq = &s->rq; @@ -1249,8 +1216,7 @@ static int aggregate_stats_dump(struct datapath *dp, void *state, struct sw_flow_key match_key; int table_idx; - rpy = buffer_put_uninit(buffer, sizeof *rpy); - memset(rpy, 0, sizeof *rpy); + rpy = ofpbuf_put_zeros(buffer, sizeof *rpy); flow_extract_match(&match_key, &rq->match); table_idx = rq->table_id == 0xff ? 0 : rq->table_id; @@ -1282,19 +1248,20 @@ static void aggregate_stats_done(void *state) } static int table_stats_dump(struct datapath *dp, void *state, - struct buffer *buffer) + struct ofpbuf *buffer) { int i; for (i = 0; i < dp->chain->n_tables; i++) { - struct ofp_table_stats *ots = buffer_put_uninit(buffer, sizeof *ots); + struct ofp_table_stats *ots = ofpbuf_put_zeros(buffer, sizeof *ots); struct sw_table_stats stats; dp->chain->tables[i]->stats(dp->chain->tables[i], &stats); strncpy(ots->name, stats.name, sizeof ots->name); ots->table_id = i; - memset(ots->pad, 0, sizeof ots->pad); + ots->wildcards = htonl(stats.wildcards); ots->max_entries = htonl(stats.max_flows); ots->active_count = htonl(stats.n_flows); - ots->matched_count = htonll(0); /* FIXME */ + ots->lookup_count = htonll(stats.n_lookup); + ots->matched_count = htonll(stats.n_matched); } return 0; } @@ -1313,23 +1280,31 @@ static int port_stats_init(struct datapath *dp, const void *body, int body_len, } static int port_stats_dump(struct datapath *dp, void *state, - struct buffer *buffer) + struct ofpbuf *buffer) { struct port_stats_state *s = state; int i; - for (i = s->port; i < OFPP_MAX; i++) { + for (i = s->port; i < DP_MAX_PORTS; i++) { struct sw_port *p = &dp->ports[i]; struct ofp_port_stats *ops; if (!p->netdev) { continue; } - ops = buffer_put_uninit(buffer, sizeof *ops); + ops = ofpbuf_put_zeros(buffer, sizeof *ops); ops->port_no = htons(port_no(dp, p)); - memset(ops->pad, 0, sizeof ops->pad); - ops->rx_count = htonll(p->rx_count); - ops->tx_count = htonll(p->tx_count); - ops->drop_count = htonll(p->drop_count); + ops->rx_packets = htonll(p->rx_packets); + ops->tx_packets = htonll(p->tx_packets); + ops->rx_bytes = htonll(p->rx_bytes); + ops->tx_bytes = htonll(p->tx_bytes); + ops->rx_dropped = htonll(-1); + ops->tx_dropped = htonll(p->tx_dropped); + ops->rx_errors = htonll(-1); + ops->tx_errors = htonll(-1); + ops->rx_frame_err = htonll(-1); + ops->rx_over_err = htonll(-1); + ops->rx_crc_err = htonll(-1); + ops->collisions = htonll(-1); ops++; } s->port = i; @@ -1342,6 +1317,9 @@ static void port_stats_done(void *state) } struct stats_type { + /* Value for 'type' member of struct ofp_stats_request. */ + int type; + /* Minimum and maximum acceptable number of bytes in body member of * struct ofp_stats_request. */ size_t min_body, max_body; @@ -1358,7 +1336,7 @@ struct stats_type { * struct ofp_stats_reply. On success, it should return 1 if it should be * called again later with another buffer, 0 if it is done, or a negative * errno value on failure. */ - int (*dump)(struct datapath *dp, void *state, struct buffer *buffer); + int (*dump)(struct datapath *dp, void *state, struct ofpbuf *buffer); /* Cleans any state created by the init or dump functions. May be null * if no cleanup is required. */ @@ -1366,28 +1344,40 @@ struct stats_type { }; static const struct stats_type stats[] = { - [OFPST_FLOW] = { + { + OFPST_DESC, + 0, + 0, + NULL, + desc_stats_dump, + NULL + }, + { + OFPST_FLOW, sizeof(struct ofp_flow_stats_request), sizeof(struct ofp_flow_stats_request), flow_stats_init, flow_stats_dump, flow_stats_done }, - [OFPST_AGGREGATE] = { + { + OFPST_AGGREGATE, sizeof(struct ofp_aggregate_stats_request), sizeof(struct ofp_aggregate_stats_request), aggregate_stats_init, aggregate_stats_dump, aggregate_stats_done }, - [OFPST_TABLE] = { + { + OFPST_TABLE, 0, 0, NULL, table_stats_dump, NULL }, - [OFPST_PORT] = { + { + OFPST_PORT, 0, 0, port_stats_init, @@ -1409,16 +1399,16 @@ stats_dump(struct datapath *dp, void *cb_) { struct stats_dump_cb *cb = cb_; struct ofp_stats_reply *osr; - struct buffer *buffer; + struct ofpbuf *buffer; int err; if (cb->done) { return 0; } - osr = alloc_openflow_buffer(dp, sizeof *osr, OFPT_STATS_REPLY, &cb->sender, - &buffer); - osr->type = htons(cb->s - stats); + osr = make_openflow_reply(sizeof *osr, OFPT_STATS_REPLY, &cb->sender, + &buffer); + osr->type = htons(cb->s->type); osr->flags = 0; err = cb->s->dump(dp, cb->state, buffer); @@ -1428,7 +1418,7 @@ stats_dump(struct datapath *dp, void *cb_) cb->done = true; } else { /* Buffer might have been reallocated, so find our data again. */ - osr = buffer_at_assert(buffer, 0, sizeof *osr); + osr = ofpbuf_at_assert(buffer, 0, sizeof *osr); osr->flags = ntohs(OFPSF_REPLY_MORE); } err2 = send_openflow_buffer(dp, buffer, &cb->sender); @@ -1458,27 +1448,33 @@ recv_stats_request(struct datapath *dp, const struct sender *sender, { const struct ofp_stats_request *rq = oh; size_t rq_len = ntohs(rq->header.length); + const struct stats_type *st; struct stats_dump_cb *cb; int type, body_len; int err; type = ntohs(rq->type); - if (type >= ARRAY_SIZE(stats) || !stats[type].dump) { - VLOG_WARN("received stats request of unknown type %d", type); - return -EINVAL; + for (st = stats; ; st++) { + if (st >= &stats[ARRAY_SIZE(stats)]) { + VLOG_WARN_RL(&rl, "received stats request of unknown type %d", + type); + return -EINVAL; + } else if (type == st->type) { + break; + } } cb = xmalloc(sizeof *cb); cb->done = false; cb->rq = xmemdup(rq, rq_len); cb->sender = *sender; - cb->s = &stats[type]; + cb->s = st; cb->state = NULL; body_len = rq_len - offsetof(struct ofp_stats_request, body); if (body_len < cb->s->min_body || body_len > cb->s->max_body) { - VLOG_WARN("stats request type %d with bad body length %d", - type, body_len); + VLOG_WARN_RL(&rl, "stats request type %d with bad body length %d", + type, body_len); err = -EINVAL; goto error; } @@ -1486,8 +1482,9 @@ recv_stats_request(struct datapath *dp, const struct sender *sender, if (cb->s->init) { err = cb->s->init(dp, rq->body, body_len, &cb->state); if (err) { - VLOG_WARN("failed initialization of stats request type %d: %s", - type, strerror(-err)); + VLOG_WARN_RL(&rl, + "failed initialization of stats request type %d: %s", + type, strerror(-err)); goto error; } } @@ -1501,63 +1498,85 @@ error: return err; } +static int +recv_echo_request(struct datapath *dp, const struct sender *sender, + const void *oh) +{ + return send_openflow_buffer(dp, make_echo_reply(oh), sender); +} + +static int +recv_echo_reply(struct datapath *dp UNUSED, const struct sender *sender UNUSED, + const void *oh UNUSED) +{ + return 0; +} + /* 'msg', which is 'length' bytes long, was received from the control path. * Apply it to 'chain'. */ int fwd_control_input(struct datapath *dp, const struct sender *sender, const void *msg, size_t length) { - struct openflow_packet { - size_t min_size; - int (*handler)(struct datapath *, const struct sender *, const void *); - }; - - static const struct openflow_packet packets[] = { - [OFPT_FEATURES_REQUEST] = { - sizeof (struct ofp_header), - recv_features_request, - }, - [OFPT_GET_CONFIG_REQUEST] = { - sizeof (struct ofp_header), - recv_get_config_request, - }, - [OFPT_SET_CONFIG] = { - sizeof (struct ofp_switch_config), - recv_set_config, - }, - [OFPT_PACKET_OUT] = { - sizeof (struct ofp_packet_out), - recv_packet_out, - }, - [OFPT_FLOW_MOD] = { - sizeof (struct ofp_flow_mod), - recv_flow, - }, - [OFPT_PORT_MOD] = { - sizeof (struct ofp_port_mod), - recv_port_mod, - }, - [OFPT_STATS_REQUEST] = { - sizeof (struct ofp_stats_request), - recv_stats_request, - }, - }; - - const struct openflow_packet *pkt; + int (*handler)(struct datapath *, const struct sender *, const void *); struct ofp_header *oh; + size_t min_size; + /* Check encapsulated length. */ oh = (struct ofp_header *) msg; - if (oh->version != OFP_VERSION || oh->type >= ARRAY_SIZE(packets) - || ntohs(oh->length) > length) + if (ntohs(oh->length) > length) { + return -EINVAL; + } + assert(oh->version == OFP_VERSION); + + /* Figure out how to handle it. */ + switch (oh->type) { + case OFPT_FEATURES_REQUEST: + min_size = sizeof(struct ofp_header); + handler = recv_features_request; + break; + case OFPT_GET_CONFIG_REQUEST: + min_size = sizeof(struct ofp_header); + handler = recv_get_config_request; + break; + case OFPT_SET_CONFIG: + min_size = sizeof(struct ofp_switch_config); + handler = recv_set_config; + break; + case OFPT_PACKET_OUT: + min_size = sizeof(struct ofp_packet_out); + handler = recv_packet_out; + break; + case OFPT_FLOW_MOD: + min_size = sizeof(struct ofp_flow_mod); + handler = recv_flow; + break; + case OFPT_PORT_MOD: + min_size = sizeof(struct ofp_port_mod); + handler = recv_port_mod; + break; + case OFPT_STATS_REQUEST: + min_size = sizeof(struct ofp_stats_request); + handler = recv_stats_request; + break; + case OFPT_ECHO_REQUEST: + min_size = sizeof(struct ofp_header); + handler = recv_echo_request; + break; + case OFPT_ECHO_REPLY: + min_size = sizeof(struct ofp_header); + handler = recv_echo_reply; + break; + default: + dp_send_error_msg(dp, sender, OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE, + msg, length); return -EINVAL; + } - pkt = &packets[oh->type]; - if (!pkt->handler) - return -ENOSYS; - if (length < pkt->min_size) + /* Handle it. */ + if (length < min_size) return -EFAULT; - - return pkt->handler(dp, sender, msg); + return handler(dp, sender, msg); } /* Packet buffering. */ @@ -1565,7 +1584,7 @@ fwd_control_input(struct datapath *dp, const struct sender *sender, #define OVERWRITE_SECS 1 struct packet_buffer { - struct buffer *buffer; + struct ofpbuf *buffer; uint32_t cookie; time_t timeout; }; @@ -1573,7 +1592,7 @@ struct packet_buffer { static struct packet_buffer buffers[N_PKT_BUFFERS]; static unsigned int buffer_idx; -uint32_t save_buffer(struct buffer *buffer) +uint32_t save_buffer(struct ofpbuf *buffer) { struct packet_buffer *p; uint32_t id; @@ -1583,26 +1602,26 @@ uint32_t save_buffer(struct buffer *buffer) if (p->buffer) { /* Don't buffer packet if existing entry is less than * OVERWRITE_SECS old. */ - if (time(0) < p->timeout) { /* FIXME */ + if (time_now() < p->timeout) { /* FIXME */ return -1; } else { - buffer_delete(p->buffer); + ofpbuf_delete(p->buffer); } } /* Don't use maximum cookie value since the all-bits-1 id is * special. */ if (++p->cookie >= (1u << PKT_COOKIE_BITS) - 1) p->cookie = 0; - p->buffer = buffer_clone(buffer); /* FIXME */ - p->timeout = time(0) + OVERWRITE_SECS; /* FIXME */ + p->buffer = ofpbuf_clone(buffer); /* FIXME */ + p->timeout = time_now() + OVERWRITE_SECS; /* FIXME */ id = buffer_idx | (p->cookie << PKT_BUFFER_BITS); return id; } -static struct buffer *retrieve_buffer(uint32_t id) +static struct ofpbuf *retrieve_buffer(uint32_t id) { - struct buffer *buffer = NULL; + struct ofpbuf *buffer = NULL; struct packet_buffer *p; p = &buffers[id & PKT_BUFFER_MASK]; @@ -1623,7 +1642,7 @@ static void discard_buffer(uint32_t id) p = &buffers[id & PKT_BUFFER_MASK]; if (p->cookie == id >> PKT_BUFFER_BITS) { - buffer_delete(p->buffer); + ofpbuf_delete(p->buffer); p->buffer = NULL; } }