ofproto/status.c

   1 /*
   2  * Copyright (c) 2008, 2009, 2010 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18 #include "status.h"
  19 #include <arpa/inet.h>
  20 #include <assert.h>
  21 #include <errno.h>
  22 #include <inttypes.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include "dynamic-string.h"
  26 #include "list.h"
  27 #include "ofpbuf.h"
  28 #include "ofproto.h"
  29 #include "openflow/nicira-ext.h"
  30 #include "packets.h"
  31 #include "rconn.h"
  32 #include "svec.h"
  33 #include "timeval.h"
  34 #include "vconn.h"
  35
  36 #define THIS_MODULE VLM_status
  37 #include "vlog.h"
  38
  39 struct status_category {
  40     struct list node;
  41     char *name;
  42     void (*cb)(struct status_reply *, void *aux);
  43     void *aux;
  44 };
  45
  46 struct switch_status {
  47     time_t booted;
  48     struct status_category *config_cat;
  49     struct status_category *switch_cat;
  50     struct list categories;
  51 };
  52
  53 struct status_reply {
  54     struct status_category *category;
  55     struct ds request;
  56     struct ds output;
  57 };
  58
  59 int
  60 switch_status_handle_request(struct switch_status *ss, struct rconn *rconn,
  61                              struct nicira_header *request)
  62 {
  63     struct status_category *c;
  64     struct nicira_header *reply;
  65     struct status_reply sr;
  66     struct ofpbuf *b;
  67     int retval;
  68
  69     sr.request.string = (void *) (request + 1);
  70     sr.request.length = ntohs(request->header.length) - sizeof *request;
  71     ds_init(&sr.output);
  72     LIST_FOR_EACH (c, struct status_category, node, &ss->categories) {
  73         if (!memcmp(c->name, sr.request.string,
  74                     MIN(strlen(c->name), sr.request.length))) {
  75             sr.category = c;
  76             c->cb(&sr, c->aux);
  77         }
  78     }
  79     reply = make_openflow_xid(sizeof *reply + sr.output.length,
  80                               OFPT_VENDOR, request->header.xid, &b);
  81     reply->vendor = htonl(NX_VENDOR_ID);
  82     reply->subtype = htonl(NXT_STATUS_REPLY);
  83     memcpy(reply + 1, sr.output.string, sr.output.length);
  84     retval = rconn_send(rconn, b, NULL);
  85     if (retval && retval != EAGAIN) {
  86         VLOG_WARN("send failed (%s)", strerror(retval));
  87     }
  88     ds_destroy(&sr.output);
  89     return 0;
  90 }
  91
  92 void
  93 rconn_status_cb(struct status_reply *sr, void *rconn_)
  94 {
  95     struct rconn *rconn = rconn_;
  96     time_t now = time_now();
  97     uint32_t remote_ip = rconn_get_remote_ip(rconn);
  98     uint32_t local_ip = rconn_get_local_ip(rconn);
  99
 100     status_reply_put(sr, "name=%s", rconn_get_target(rconn));
 101     if (remote_ip) {
 102         status_reply_put(sr, "remote-ip="IP_FMT, IP_ARGS(&remote_ip));
 103         status_reply_put(sr, "remote-port=%d",
 104                          ntohs(rconn_get_remote_port(rconn)));
 105         status_reply_put(sr, "local-ip="IP_FMT, IP_ARGS(&local_ip));
 106         status_reply_put(sr, "local-port=%d",
 107                          ntohs(rconn_get_local_port(rconn)));
 108     }
 109     status_reply_put(sr, "state=%s", rconn_get_state(rconn));
 110     status_reply_put(sr, "backoff=%d", rconn_get_backoff(rconn));
 111     status_reply_put(sr, "probe-interval=%d", rconn_get_probe_interval(rconn));
 112     status_reply_put(sr, "is-connected=%s",
 113                      rconn_is_connected(rconn) ? "true" : "false");
 114     status_reply_put(sr, "sent-msgs=%u", rconn_packets_sent(rconn));
 115     status_reply_put(sr, "received-msgs=%u", rconn_packets_received(rconn));
 116     status_reply_put(sr, "attempted-connections=%u",
 117                      rconn_get_attempted_connections(rconn));
 118     status_reply_put(sr, "successful-connections=%u",
 119                      rconn_get_successful_connections(rconn));
 120     status_reply_put(sr, "last-connection=%ld",
 121                      (long int) (now - rconn_get_last_connection(rconn)));
 122     status_reply_put(sr, "last-received=%ld",
 123                      (long int) (now - rconn_get_last_received(rconn)));
 124     status_reply_put(sr, "time-connected=%lu",
 125                      rconn_get_total_time_connected(rconn));
 126     status_reply_put(sr, "state-elapsed=%u", rconn_get_state_elapsed(rconn));
 127 }
 128
 129 static void
 130 config_status_cb(struct status_reply *sr, void *ofproto_)
 131 {
 132     const struct ofproto *ofproto = ofproto_;
 133     uint64_t datapath_id;
 134     struct svec listeners;
 135     size_t i;
 136
 137     datapath_id = ofproto_get_datapath_id(ofproto);
 138     if (datapath_id) {
 139         status_reply_put(sr, "datapath-id=%016"PRIx64, datapath_id);
 140     }
 141
 142     svec_init(&listeners);
 143     ofproto_get_listeners(ofproto, &listeners);
 144     for (i = 0; i < listeners.n; i++) {
 145         status_reply_put(sr, "management%zu=%s", i, listeners.names[i]);
 146     }
 147     svec_destroy(&listeners);
 148 }
 149
 150 static void
 151 switch_status_cb(struct status_reply *sr, void *ss_)
 152 {
 153     struct switch_status *ss = ss_;
 154     time_t now = time_now();
 155
 156     status_reply_put(sr, "now=%ld", (long int) now);
 157     status_reply_put(sr, "uptime=%ld", (long int) (now - ss->booted));
 158     status_reply_put(sr, "pid=%ld", (long int) getpid());
 159 }
 160
 161 struct switch_status *
 162 switch_status_create(const struct ofproto *ofproto)
 163 {
 164     struct switch_status *ss = xzalloc(sizeof *ss);
 165     ss->booted = time_now();
 166     list_init(&ss->categories);
 167     ss->config_cat = switch_status_register(ss, "config", config_status_cb,
 168                                             (void *) ofproto);
 169     ss->switch_cat = switch_status_register(ss, "switch", switch_status_cb,
 170                                             ss);
 171     return ss;
 172 }
 173
 174 void
 175 switch_status_destroy(struct switch_status *ss)
 176 {
 177     if (ss) {
 178         /* Orphan any remaining categories, so that unregistering them later
 179          * won't write to bad memory. */
 180         struct status_category *c, *next;
 181         LIST_FOR_EACH_SAFE (c, next,
 182                             struct status_category, node, &ss->categories) {
 183             list_init(&c->node);
 184         }
 185         switch_status_unregister(ss->config_cat);
 186         switch_status_unregister(ss->switch_cat);
 187         free(ss);
 188     }
 189 }
 190
 191 struct status_category *
 192 switch_status_register(struct switch_status *ss,
 193                        const char *category,
 194                        status_cb_func *cb, void *aux)
 195 {
 196     struct status_category *c = xmalloc(sizeof *c);
 197     c->cb = cb;
 198     c->aux = aux;
 199     c->name = xstrdup(category);
 200     list_push_back(&ss->categories, &c->node);
 201     return c;
 202 }
 203
 204 void
 205 switch_status_unregister(struct status_category *c)
 206 {
 207     if (c) {
 208         if (!list_is_empty(&c->node)) {
 209             list_remove(&c->node);
 210         }
 211         free(c->name);
 212         free(c);
 213     }
 214 }
 215
 216 void
 217 status_reply_put(struct status_reply *sr, const char *content, ...)
 218 {
 219     size_t old_length = sr->output.length;
 220     size_t added;
 221     va_list args;
 222
 223     /* Append the status reply to the output. */
 224     ds_put_format(&sr->output, "%s.", sr->category->name);
 225     va_start(args, content);
 226     ds_put_format_valist(&sr->output, content, args);
 227     va_end(args);
 228     if (ds_last(&sr->output) != '\n') {
 229         ds_put_char(&sr->output, '\n');
 230     }
 231
 232     /* Drop what we just added if it doesn't match the request. */
 233     added = sr->output.length - old_length;
 234     if (added < sr->request.length
 235         || memcmp(&sr->output.string[old_length],
 236                   sr->request.string, sr->request.length)) {
 237         ds_truncate(&sr->output, old_length);
 238     }
 239 }