return send_openflow_skb(skb, NULL);
}
+static void
+fill_flow_stats(struct ofp_flow_stats *ofs, struct sw_flow *flow,
+ int table_idx)
+{
+ int duration;
+
+ ofs->match.wildcards = htons(flow->key.wildcards);
+ ofs->match.in_port = flow->key.in_port;
+ memcpy(ofs->match.dl_src, flow->key.dl_src, ETH_ALEN);
+ memcpy(ofs->match.dl_dst, flow->key.dl_dst, ETH_ALEN);
+ ofs->match.dl_vlan = flow->key.dl_vlan;
+ ofs->match.dl_type = flow->key.dl_type;
+ ofs->match.nw_src = flow->key.nw_src;
+ ofs->match.nw_dst = flow->key.nw_dst;
+ ofs->match.nw_proto = flow->key.nw_proto;
+ memset(ofs->match.pad, 0, sizeof ofs->match.pad);
+ ofs->match.tp_src = flow->key.tp_src;
+ ofs->match.tp_dst = flow->key.tp_dst;
+ duration = (jiffies - flow->init_time) / HZ;
+ ofs->duration = htons(min(65535, duration));
+ ofs->table_id = htons(table_idx);
+ ofs->packet_count = cpu_to_be64(flow->packet_count);
+ ofs->byte_count = cpu_to_be64(flow->byte_count);
+}
+
+int
+dp_send_flow_stats(struct datapath *dp, const struct sender *sender,
+ const struct ofp_match *match)
+{
+ struct sk_buff *skb;
+ struct ofp_flow_stat_reply *fsr;
+ size_t header_size, fudge, flow_size;
+ struct sw_flow_key match_key;
+ int table_idx, n_flows, max_flows;
+
+ header_size = offsetof(struct ofp_flow_stat_reply, flows);
+ fudge = 128;
+ flow_size = sizeof fsr->flows[0];
+ max_flows = (NLMSG_GOODSIZE - header_size - fudge) / flow_size;
+ fsr = alloc_openflow_skb(dp, header_size + max_flows * flow_size,
+ OFPT_FLOW_STAT_REPLY, sender, &skb);
+ if (!fsr)
+ return -ENOMEM;
+
+ n_flows = 0;
+ flow_extract_match(&match_key, match);
+ for (table_idx = 0; table_idx < dp->chain->n_tables; table_idx++) {
+ struct sw_table *table = dp->chain->tables[table_idx];
+ struct swt_iterator iter;
+
+ if (n_flows >= max_flows) {
+ break;
+ }
+
+ if (!table->iterator(table, &iter)) {
+ if (net_ratelimit())
+ printk("iterator failed for table %d\n",
+ table_idx);
+ continue;
+ }
+
+ for (; iter.flow; table->iterator_next(&iter)) {
+ if (flow_matches(&match_key, &iter.flow->key)) {
+ fill_flow_stats(&fsr->flows[n_flows],
+ iter.flow, table_idx);
+ if (++n_flows >= max_flows) {
+ break;
+ }
+ }
+ }
+ table->iterator_destroy(&iter);
+ }
+ resize_openflow_skb(skb, &fsr->header,
+ header_size + flow_size * n_flows);
+ return send_openflow_skb(skb, sender);
+}
+
+static int
+fill_port_stat_reply(struct datapath *dp, struct ofp_port_stat_reply *psr)
+{
+ struct net_bridge_port *p;
+ int port_count = 0;
+
+ list_for_each_entry_rcu (p, &dp->port_list, node) {
+ struct ofp_port_stats *ps = &psr->ports[port_count++];
+ struct net_device_stats *stats = p->dev->get_stats(p->dev);
+ ps->port_no = htons(p->port_no);
+ memset(ps->pad, 0, sizeof ps->pad);
+ ps->rx_count = cpu_to_be64(stats->rx_packets);
+ ps->tx_count = cpu_to_be64(stats->tx_packets);
+ ps->drop_count = cpu_to_be64(stats->rx_dropped
+ + stats->tx_dropped);
+ }
+
+ return port_count;
+}
+
+int
+dp_send_port_stats(struct datapath *dp, const struct sender *sender)
+{
+ struct sk_buff *skb;
+ struct ofp_port_stat_reply *psr;
+ size_t psr_len, port_max_len;
+ int port_count;
+
+ /* Overallocate. */
+ port_max_len = sizeof(struct ofp_port_stats) * OFPP_MAX;
+ psr = alloc_openflow_skb(dp, sizeof *psr + port_max_len,
+ OFPT_PORT_STAT_REPLY, sender, &skb);
+ if (!psr)
+ return -ENOMEM;
+
+ /* Fill. */
+ port_count = fill_port_stat_reply(dp, psr);
+
+ /* Shrink to fit. */
+ psr_len = sizeof *psr + sizeof(struct ofp_port_stats) * port_count;
+ resize_openflow_skb(skb, &psr->header, psr_len);
+ return send_openflow_skb(skb, sender);
+}
+
+int
+dp_send_table_stats(struct datapath *dp, const struct sender *sender)
+{
+ struct sk_buff *skb;
+ struct ofp_table_stat_reply *tsr;
+ int i, n_tables;
+
+ n_tables = dp->chain->n_tables;
+ tsr = alloc_openflow_skb(dp, (offsetof(struct ofp_table_stat_reply,
+ tables)
+ + sizeof tsr->tables[0] * n_tables),
+ OFPT_TABLE_STAT_REPLY, sender, &skb);
+ if (!tsr)
+ return -ENOMEM;
+ for (i = 0; i < n_tables; i++) {
+ struct ofp_table_stats *ots = &tsr->tables[i];
+ 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 = htons(i);
+ ots->pad[0] = ots->pad[1] = 0;
+ ots->max_entries = htonl(stats.max_flows);
+ ots->active_count = htonl(stats.n_flows);
+ ots->matched_count = cpu_to_be64(0); /* FIXME */
+ }
+ return send_openflow_skb(skb, sender);
+}
+
/* Generic Netlink interface.
*
* See netlink(7) for an introduction to netlink. See
return err;
}
-/*
- * Fill flow entry for nl flow query. Called with rcu_lock
- *
- */
-static
-int
-dp_fill_flow(struct ofp_flow_mod* ofm, struct swt_iterator* iter)
-{
- ofm->header.version = OFP_VERSION;
- ofm->header.type = OFPT_FLOW_MOD;
- ofm->header.length = htons(sizeof(struct ofp_flow_mod)
- + sizeof(ofm->actions[0]));
- ofm->header.xid = htonl(0);
-
- ofm->match.wildcards = htons(iter->flow->key.wildcards);
- ofm->match.in_port = iter->flow->key.in_port;
- ofm->match.dl_vlan = iter->flow->key.dl_vlan;
- memcpy(ofm->match.dl_src, iter->flow->key.dl_src, ETH_ALEN);
- memcpy(ofm->match.dl_dst, iter->flow->key.dl_dst, ETH_ALEN);
- ofm->match.dl_type = iter->flow->key.dl_type;
- ofm->match.nw_src = iter->flow->key.nw_src;
- ofm->match.nw_dst = iter->flow->key.nw_dst;
- ofm->match.nw_proto = iter->flow->key.nw_proto;
- ofm->match.tp_src = iter->flow->key.tp_src;
- ofm->match.tp_dst = iter->flow->key.tp_dst;
- ofm->group_id = iter->flow->group_id;
- ofm->max_idle = iter->flow->max_idle;
- /* TODO support multiple actions */
- ofm->actions[0] = iter->flow->actions[0];
-
- return 0;
-}
-
-/* Convenience function */
-static
-void*
-dp_init_nl_flow_msg(uint32_t dp_idx, uint16_t table_idx,
- struct genl_info *info, struct sk_buff* skb)
-{
- void* data;
-
- data = genlmsg_put_reply(skb, info, &dp_genl_family, 0,
- DP_GENL_C_QUERY_FLOW);
- if (data == NULL)
- return NULL;
- NLA_PUT_U32(skb, DP_GENL_A_DP_IDX, dp_idx);
- NLA_PUT_U16(skb, DP_GENL_A_TABLEIDX, table_idx);
-
- return data;
-
-nla_put_failure:
- return NULL;
-}
-
-/* Iterate through the specified table and send all flow entries over
- * netlink to userspace. Each flow message has the following format:
- *
- * 32bit dpix
- * 16bit tabletype
- * 32bit number of flows
- * openflow-flow-entries
- *
- * The full table may require multiple messages. A message with 0 flows
- * signifies end-of message.
- */
-
-static
-int
-dp_dump_table(struct datapath *dp, uint16_t table_idx, struct genl_info *info, struct ofp_flow_mod* matchme)
-{
- struct sk_buff *skb = 0;
- struct sw_table *table = 0;
- struct swt_iterator iter;
- struct sw_flow_key in_flow;
- struct nlattr *attr;
- int count = 0, sum_count = 0;
- void *data;
- uint8_t* ofm_ptr = 0;
- struct nlattr *num_attr;
- int err = -ENOMEM;
-
- table = dp->chain->tables[table_idx];
- if ( table == NULL ) {
- dprintk("dp::dp_dump_table error, non-existant table at position %d\n", table_idx);
- return -EINVAL;
- }
-
- if (!table->iterator(table, &iter)) {
- dprintk("dp::dp_dump_table couldn't initialize empty table iterator\n");
- return -ENOMEM;
- }
-
- while (iter.flow) {
-
- /* verify that we can fit all NL_FLOWS_PER_MESSAGE in a single
- * sk_buf */
- if( (sizeof(dp_genl_family) + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint32_t) +
- (NL_FLOWS_PER_MESSAGE * sizeof(struct ofp_flow_mod))) > (8192 - 64)){
- dprintk("dp::dp_dump_table NL_FLOWS_PER_MESSAGE may cause overrun in skbuf\n");
- return -ENOMEM;
- }
-
- skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
- if (skb == NULL) {
- return -ENOMEM;
- }
-
- data = dp_init_nl_flow_msg(dp->dp_idx, table_idx, info, skb);
- if (data == NULL){
- err= -ENOMEM;
- goto error_free_skb;
- }
-
- /* reserve space to put the number of flows for this message, to
- * be filled after the loop*/
- num_attr = nla_reserve(skb, DP_GENL_A_NUMFLOWS, sizeof(uint32_t));
- if(!num_attr){
- err = -ENOMEM;
- goto error_free_skb;
- }
-
- /* Only load NL_FLOWS_PER_MESSAGE flows at a time */
- attr = nla_reserve(skb, DP_GENL_A_FLOW,
- (sizeof(struct ofp_flow_mod) + sizeof(struct ofp_action)) * NL_FLOWS_PER_MESSAGE);
- if (!attr){
- err = -ENOMEM;
- goto error_free_skb;
- }
-
- /* internal loop to fill NL_FLOWS_PER_MESSAGE flows */
- ofm_ptr = nla_data(attr);
- flow_extract_match(&in_flow, &matchme->match);
- while (iter.flow && count < NL_FLOWS_PER_MESSAGE) {
- if(flow_matches(&in_flow, &iter.flow->key)){
- if((err = dp_fill_flow((struct ofp_flow_mod*)ofm_ptr, &iter)))
- goto error_free_skb;
- count++;
- /* TODO support multiple actions */
- ofm_ptr += sizeof(struct ofp_flow_mod) + sizeof(struct ofp_action);
- }
- table->iterator_next(&iter);
- }
-
- *((uint32_t*)nla_data(num_attr)) = count;
- genlmsg_end(skb, data);
-
- sum_count += count;
- count = 0;
-
- err = genlmsg_unicast(skb, info->snd_pid);
- skb = 0;
- }
-
- /* send a sentinal message saying we're done */
- skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
- if (skb == NULL) {
- return -ENOMEM;
- }
- data = dp_init_nl_flow_msg(dp->dp_idx, table_idx, info, skb);
- if (data == NULL){
- err= -ENOMEM;
- goto error_free_skb;
- }
-
- NLA_PUT_U32(skb, DP_GENL_A_NUMFLOWS, 0);
- /* dummy flow so nl doesn't complain */
- attr = nla_reserve(skb, DP_GENL_A_FLOW, sizeof(struct ofp_flow_mod));
- if (!attr){
- err = -ENOMEM;
- goto error_free_skb;
- }
- genlmsg_end(skb, data);
- err = genlmsg_reply(skb, info); skb = 0;
-
-nla_put_failure:
-error_free_skb:
- if(skb)
- kfree_skb(skb);
- return err;
-}
-
-/* Helper function to query_table which creates and sends a message packed with
- * table stats. Message form is:
- *
- * u32 DP_IDX
- * u32 NUM_TABLES
- * OFP_TABLE (list of OFP_TABLES)
- *
- */
-
-static
-int
-dp_dump_table_stats(struct datapath *dp, int dp_idx, struct genl_info *info)
-{
- struct sk_buff *skb = 0;
- struct ofp_table *ot = 0;
- struct nlattr *attr;
- struct sw_table_stats stats;
- size_t len;
- void *data;
- int err = -ENOMEM;
- int i = 0;
- int nt = dp->chain->n_tables;
-
- len = 4 + 4 + (sizeof(struct ofp_table) * nt);
-
- /* u32 IDX, u32 NUMTABLES, list-of-tables */
- skb = nlmsg_new(MAX(len, NLMSG_GOODSIZE), GFP_ATOMIC);
- if (skb == NULL) {
- return -ENOMEM;
- }
-
- data = genlmsg_put_reply(skb, info, &dp_genl_family, 0,
- DP_GENL_C_QUERY_TABLE);
- if (data == NULL){
- return -ENOMEM;
- }
-
- NLA_PUT_U32(skb, DP_GENL_A_DP_IDX, dp_idx);
- NLA_PUT_U32(skb, DP_GENL_A_NUMTABLES, nt);
-
- /* ... we assume that all tables can fit in a single message.
- * Probably a reasonable assumption seeing that we only have
- * 3 atm */
- attr = nla_reserve(skb, DP_GENL_A_TABLE, (sizeof(struct ofp_table) * nt));
- if (!attr){
- err = -ENOMEM;
- goto error_free_skb;
- }
-
- ot = nla_data(attr);
-
- for (i = 0; i < nt; ++i) {
- dp->chain->tables[i]->stats(dp->chain->tables[i], &stats);
- ot->header.version = OFP_VERSION;
- ot->header.type = OFPT_TABLE;
- ot->header.length = htons(sizeof(struct ofp_table));
- ot->header.xid = htonl(0);
-
- strncpy(ot->name, stats.name, OFP_MAX_TABLE_NAME_LEN);
- ot->table_id = htons(i);
- ot->n_flows = htonl(stats.n_flows);
- ot->max_flows = htonl(stats.max_flows);
- ot++;
- }
-
- genlmsg_end(skb, data);
- err = genlmsg_reply(skb, info); skb = 0;
-
-nla_put_failure:
-error_free_skb:
- if(skb)
- kfree_skb(skb);
- return err;
-}
-
-/*
- * Queries a datapath for flow-table statistics
- */
-
-
-static int dp_genl_table_query(struct sk_buff *skb, struct genl_info *info)
-{
- struct datapath* dp;
- int err = 0;
-
- if (!info->attrs[DP_GENL_A_DP_IDX]) {
- dprintk("dp::dp_genl_table_query received message with missing attributes\n");
- return -EINVAL;
- }
-
- rcu_read_lock();
- dp = dp_get(nla_get_u32(info->attrs[DP_GENL_A_DP_IDX]));
- if (!dp) {
- err = -ENOENT;
- goto err_out;
- }
-
- err = dp_dump_table_stats(dp, nla_get_u32(info->attrs[DP_GENL_A_DP_IDX]), info);
-
-err_out:
- rcu_read_unlock();
- return err;
-}
-
-/*
- * Queries a datapath for flow-table entries.
- */
-
-static int dp_genl_flow_query(struct sk_buff *skb, struct genl_info *info)
-{
- struct datapath* dp;
- struct ofp_flow_mod* ofm;
- u16 table_idx;
- int err = 0;
-
- if (!info->attrs[DP_GENL_A_DP_IDX]
- || !info->attrs[DP_GENL_A_TABLEIDX]
- || !info->attrs[DP_GENL_A_FLOW]) {
- dprintk("dp::dp_genl_flow_query received message with missing attributes\n");
- return -EINVAL;
- }
-
- rcu_read_lock();
- dp = dp_get(nla_get_u32(info->attrs[DP_GENL_A_DP_IDX]));
- if (!dp) {
- err = -ENOENT;
- goto err_out;
- }
-
- table_idx = nla_get_u16(info->attrs[DP_GENL_A_TABLEIDX]);
-
- if (dp->chain->n_tables <= table_idx){
- printk("table index %d invalid (dp has %d tables)\n",
- table_idx, dp->chain->n_tables);
- err = -EINVAL;
- goto err_out;
- }
-
- ofm = nla_data(info->attrs[DP_GENL_A_FLOW]);
- err = dp_dump_table(dp, table_idx, info, ofm);
-
-err_out:
- rcu_read_unlock();
- return err;
-}
-
-static struct nla_policy dp_genl_flow_policy[DP_GENL_A_MAX + 1] = {
- [DP_GENL_A_DP_IDX] = { .type = NLA_U32 },
- [DP_GENL_A_TABLEIDX] = { .type = NLA_U16 },
- [DP_GENL_A_NUMFLOWS] = { .type = NLA_U32 },
-};
-
-static struct genl_ops dp_genl_ops_query_flow = {
- .cmd = DP_GENL_C_QUERY_FLOW,
- .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
- .policy = dp_genl_flow_policy,
- .doit = dp_genl_flow_query,
- .dumpit = NULL,
-};
-
-static struct nla_policy dp_genl_table_policy[DP_GENL_A_MAX + 1] = {
- [DP_GENL_A_DP_IDX] = { .type = NLA_U32 },
-};
-
-static struct genl_ops dp_genl_ops_query_table = {
- .cmd = DP_GENL_C_QUERY_TABLE,
- .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
- .policy = dp_genl_table_policy,
- .doit = dp_genl_table_query,
- .dumpit = NULL,
-};
-
-
static struct genl_ops dp_genl_ops_query_dp = {
.cmd = DP_GENL_C_QUERY_DP,
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
* front. */
&dp_genl_ops_openflow,
- &dp_genl_ops_query_flow,
- &dp_genl_ops_query_table,
&dp_genl_ops_add_dp,
&dp_genl_ops_del_dp,
&dp_genl_ops_query_dp,
git://git.onelab.eu / sliver-openvswitch.git / blobdiff