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_name(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     int probe_interval, max_backoff;
 136     size_t i;
 137
 138     datapath_id = ofproto_get_datapath_id(ofproto);
 139     if (datapath_id) {
 140         status_reply_put(sr, "datapath-id=%016"PRIx64, datapath_id);
 141     }
 142
 143     svec_init(&listeners);
 144     ofproto_get_listeners(ofproto, &listeners);
 145     for (i = 0; i < listeners.n; i++) {
 146         status_reply_put(sr, "management%zu=%s", i, listeners.names[i]);
 147     }
 148     svec_destroy(&listeners);
 149
 150     probe_interval = ofproto_get_probe_interval(ofproto);
 151     if (probe_interval) {
 152         status_reply_put(sr, "probe-interval=%d", probe_interval);
 153     }
 154
 155     max_backoff = ofproto_get_max_backoff(ofproto);
 156     if (max_backoff) {
 157         status_reply_put(sr, "max-backoff=%d", max_backoff);
 158     }
 159 }
 160
 161 static void
 162 switch_status_cb(struct status_reply *sr, void *ss_)
 163 {
 164     struct switch_status *ss = ss_;
 165     time_t now = time_now();
 166
 167     status_reply_put(sr, "now=%ld", (long int) now);
 168     status_reply_put(sr, "uptime=%ld", (long int) (now - ss->booted));
 169     status_reply_put(sr, "pid=%ld", (long int) getpid());
 170 }
 171
 172 struct switch_status *
 173 switch_status_create(const struct ofproto *ofproto)
 174 {
 175     struct switch_status *ss = xzalloc(sizeof *ss);
 176     ss->booted = time_now();
 177     list_init(&ss->categories);
 178     ss->config_cat = switch_status_register(ss, "config", config_status_cb,
 179                                             (void *) ofproto);
 180     ss->switch_cat = switch_status_register(ss, "switch", switch_status_cb,
 181                                             ss);
 182     return ss;
 183 }
 184
 185 void
 186 switch_status_destroy(struct switch_status *ss)
 187 {
 188     if (ss) {
 189         /* Orphan any remaining categories, so that unregistering them later
 190          * won't write to bad memory. */
 191         struct status_category *c, *next;
 192         LIST_FOR_EACH_SAFE (c, next,
 193                             struct status_category, node, &ss->categories) {
 194             list_init(&c->node);
 195         }
 196         switch_status_unregister(ss->config_cat);
 197         switch_status_unregister(ss->switch_cat);
 198         free(ss);
 199     }
 200 }
 201
 202 struct status_category *
 203 switch_status_register(struct switch_status *ss,
 204                        const char *category,
 205                        status_cb_func *cb, void *aux)
 206 {
 207     struct status_category *c = xmalloc(sizeof *c);
 208     c->cb = cb;
 209     c->aux = aux;
 210     c->name = xstrdup(category);
 211     list_push_back(&ss->categories, &c->node);
 212     return c;
 213 }
 214
 215 void
 216 switch_status_unregister(struct status_category *c)
 217 {
 218     if (c) {
 219         if (!list_is_empty(&c->node)) {
 220             list_remove(&c->node);
 221         }
 222         free(c->name);
 223         free(c);
 224     }
 225 }
 226
 227 void
 228 status_reply_put(struct status_reply *sr, const char *content, ...)
 229 {
 230     size_t old_length = sr->output.length;
 231     size_t added;
 232     va_list args;
 233
 234     /* Append the status reply to the output. */
 235     ds_put_format(&sr->output, "%s.", sr->category->name);
 236     va_start(args, content);
 237     ds_put_format_valist(&sr->output, content, args);
 238     va_end(args);
 239     if (ds_last(&sr->output) != '\n') {
 240         ds_put_char(&sr->output, '\n');
 241     }
 242
 243     /* Drop what we just added if it doesn't match the request. */
 244     added = sr->output.length - old_length;
 245     if (added < sr->request.length
 246         || memcmp(&sr->output.string[old_length],
 247                   sr->request.string, sr->request.length)) {
 248         ds_truncate(&sr->output, old_length);
 249     }
 250 }