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 "ofp-util.h"
  28 #include "ofpbuf.h"
  29 #include "ofproto.h"
  30 #include "openflow/nicira-ext.h"
  31 #include "packets.h"
  32 #include "rconn.h"
  33 #include "svec.h"
  34 #include "timeval.h"
  35 #include "vconn.h"
  36 #include "vlog.h"
  37
  38 VLOG_DEFINE_THIS_MODULE(status)
  39
  40 struct status_category {
  41     struct list node;
  42     char *name;
  43     void (*cb)(struct status_reply *, void *aux);
  44     void *aux;
  45 };
  46
  47 struct switch_status {
  48     time_t booted;
  49     struct status_category *config_cat;
  50     struct status_category *switch_cat;
  51     struct list categories;
  52 };
  53
  54 struct status_reply {
  55     struct status_category *category;
  56     struct ds request;
  57     struct ds output;
  58 };
  59
  60 int
  61 switch_status_handle_request(struct switch_status *ss, struct rconn *rconn,
  62                              struct nicira_header *request)
  63 {
  64     struct status_category *c;
  65     struct nicira_header *reply;
  66     struct status_reply sr;
  67     struct ofpbuf *b;
  68     int retval;
  69
  70     sr.request.string = (void *) (request + 1);
  71     sr.request.length = ntohs(request->header.length) - sizeof *request;
  72     ds_init(&sr.output);
  73     LIST_FOR_EACH (c, struct status_category, node, &ss->categories) {
  74         if (!memcmp(c->name, sr.request.string,
  75                     MIN(strlen(c->name), sr.request.length))) {
  76             sr.category = c;
  77             c->cb(&sr, c->aux);
  78         }
  79     }
  80     reply = make_openflow_xid(sizeof *reply + sr.output.length,
  81                               OFPT_VENDOR, request->header.xid, &b);
  82     reply->vendor = htonl(NX_VENDOR_ID);
  83     reply->subtype = htonl(NXT_STATUS_REPLY);
  84     memcpy(reply + 1, sr.output.string, sr.output.length);
  85     retval = rconn_send(rconn, b, NULL);
  86     if (retval && retval != EAGAIN) {
  87         VLOG_WARN("send failed (%s)", strerror(retval));
  88     }
  89     ds_destroy(&sr.output);
  90     return 0;
  91 }
  92
  93 void
  94 rconn_status_cb(struct status_reply *sr, void *rconn_)
  95 {
  96     struct rconn *rconn = rconn_;
  97     time_t now = time_now();
  98     uint32_t remote_ip = rconn_get_remote_ip(rconn);
  99     uint32_t local_ip = rconn_get_local_ip(rconn);
 100
 101     status_reply_put(sr, "name=%s", rconn_get_target(rconn));
 102     if (remote_ip) {
 103         status_reply_put(sr, "remote-ip="IP_FMT, IP_ARGS(&remote_ip));
 104         status_reply_put(sr, "remote-port=%d",
 105                          ntohs(rconn_get_remote_port(rconn)));
 106         status_reply_put(sr, "local-ip="IP_FMT, IP_ARGS(&local_ip));
 107         status_reply_put(sr, "local-port=%d",
 108                          ntohs(rconn_get_local_port(rconn)));
 109     }
 110     status_reply_put(sr, "state=%s", rconn_get_state(rconn));
 111     status_reply_put(sr, "backoff=%d", rconn_get_backoff(rconn));
 112     status_reply_put(sr, "probe-interval=%d", rconn_get_probe_interval(rconn));
 113     status_reply_put(sr, "is-connected=%s",
 114                      rconn_is_connected(rconn) ? "true" : "false");
 115     status_reply_put(sr, "sent-msgs=%u", rconn_packets_sent(rconn));
 116     status_reply_put(sr, "received-msgs=%u", rconn_packets_received(rconn));
 117     status_reply_put(sr, "attempted-connections=%u",
 118                      rconn_get_attempted_connections(rconn));
 119     status_reply_put(sr, "successful-connections=%u",
 120                      rconn_get_successful_connections(rconn));
 121     status_reply_put(sr, "last-connection=%ld",
 122                      (long int) (now - rconn_get_last_connection(rconn)));
 123     status_reply_put(sr, "last-received=%ld",
 124                      (long int) (now - rconn_get_last_received(rconn)));
 125     status_reply_put(sr, "time-connected=%lu",
 126                      rconn_get_total_time_connected(rconn));
 127     status_reply_put(sr, "state-elapsed=%u", rconn_get_state_elapsed(rconn));
 128 }
 129
 130 static void
 131 config_status_cb(struct status_reply *sr, void *ofproto_)
 132 {
 133     const struct ofproto *ofproto = ofproto_;
 134     uint64_t datapath_id;
 135
 136     datapath_id = ofproto_get_datapath_id(ofproto);
 137     if (datapath_id) {
 138         status_reply_put(sr, "datapath-id=%016"PRIx64, datapath_id);
 139     }
 140 }
 141
 142 static void
 143 switch_status_cb(struct status_reply *sr, void *ss_)
 144 {
 145     struct switch_status *ss = ss_;
 146     time_t now = time_now();
 147
 148     status_reply_put(sr, "now=%ld", (long int) now);
 149     status_reply_put(sr, "uptime=%ld", (long int) (now - ss->booted));
 150     status_reply_put(sr, "pid=%ld", (long int) getpid());
 151 }
 152
 153 struct switch_status *
 154 switch_status_create(const struct ofproto *ofproto)
 155 {
 156     struct switch_status *ss = xzalloc(sizeof *ss);
 157     ss->booted = time_now();
 158     list_init(&ss->categories);
 159     ss->config_cat = switch_status_register(ss, "config", config_status_cb,
 160                                             (void *) ofproto);
 161     ss->switch_cat = switch_status_register(ss, "switch", switch_status_cb,
 162                                             ss);
 163     return ss;
 164 }
 165
 166 void
 167 switch_status_destroy(struct switch_status *ss)
 168 {
 169     if (ss) {
 170         /* Orphan any remaining categories, so that unregistering them later
 171          * won't write to bad memory. */
 172         struct status_category *c, *next;
 173         LIST_FOR_EACH_SAFE (c, next,
 174                             struct status_category, node, &ss->categories) {
 175             list_init(&c->node);
 176         }
 177         switch_status_unregister(ss->config_cat);
 178         switch_status_unregister(ss->switch_cat);
 179         free(ss);
 180     }
 181 }
 182
 183 struct status_category *
 184 switch_status_register(struct switch_status *ss,
 185                        const char *category,
 186                        status_cb_func *cb, void *aux)
 187 {
 188     struct status_category *c = xmalloc(sizeof *c);
 189     c->cb = cb;
 190     c->aux = aux;
 191     c->name = xstrdup(category);
 192     list_push_back(&ss->categories, &c->node);
 193     return c;
 194 }
 195
 196 void
 197 switch_status_unregister(struct status_category *c)
 198 {
 199     if (c) {
 200         if (!list_is_empty(&c->node)) {
 201             list_remove(&c->node);
 202         }
 203         free(c->name);
 204         free(c);
 205     }
 206 }
 207
 208 void
 209 status_reply_put(struct status_reply *sr, const char *content, ...)
 210 {
 211     size_t old_length = sr->output.length;
 212     size_t added;
 213     va_list args;
 214
 215     /* Append the status reply to the output. */
 216     ds_put_format(&sr->output, "%s.", sr->category->name);
 217     va_start(args, content);
 218     ds_put_format_valist(&sr->output, content, args);
 219     va_end(args);
 220     if (ds_last(&sr->output) != '\n') {
 221         ds_put_char(&sr->output, '\n');
 222     }
 223
 224     /* Drop what we just added if it doesn't match the request. */
 225     added = sr->output.length - old_length;
 226     if (added < sr->request.length
 227         || memcmp(&sr->output.string[old_length],
 228                   sr->request.string, sr->request.length)) {
 229         ds_truncate(&sr->output, old_length);
 230     }
 231 }