root/src/stratcon_jlog_streamer.c

Revision 88a71780101cbf23034aa0cb840f9f0368fda2dd, 17.8 kB (checked in by Theo Schlossnagle <jesus@omniti.com>, 9 years ago)

fixes #126

  • Property mode set to 100644
Line 
1 /*
2  * Copyright (c) 2007, OmniTI Computer Consulting, Inc.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are
7  * met:
8  *
9  *     * Redistributions of source code must retain the above copyright
10  *       notice, this list of conditions and the following disclaimer.
11  *     * Redistributions in binary form must reproduce the above
12  *       copyright notice, this list of conditions and the following
13  *       disclaimer in the documentation and/or other materials provided
14  *       with the distribution.
15  *     * Neither the name OmniTI Computer Consulting, Inc. nor the names
16  *       of its contributors may be used to endorse or promote products
17  *       derived from this software without specific prior written
18  *       permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32
33 #include "noit_defines.h"
34 #include "eventer/eventer.h"
35 #include "noit_conf.h"
36 #include "utils/noit_hash.h"
37 #include "utils/noit_log.h"
38 #include "noit_jlog_listener.h"
39 #include "stratcon_datastore.h"
40 #include "stratcon_jlog_streamer.h"
41
42 #include <unistd.h>
43 #include <assert.h>
44 #include <errno.h>
45 #include <sys/types.h>
46 #include <sys/socket.h>
47 #ifdef HAVE_SYS_FILIO_H
48 #include <sys/filio.h>
49 #endif
50 #include <netinet/in.h>
51 #include <sys/un.h>
52 #include <arpa/inet.h>
53
54 noit_hash_table noits = NOIT_HASH_EMPTY;
55
56 static void noit_connection_initiate_connection(noit_connection_ctx_t *ctx);
57
58 jlog_streamer_ctx_t *
59 stratcon_jlog_streamer_datastore_ctx_alloc(void) {
60   jlog_streamer_ctx_t *ctx;
61   ctx = stratcon_jlog_streamer_ctx_alloc();
62   ctx->jlog_feed_cmd = htonl(NOIT_JLOG_DATA_FEED);
63   ctx->push = stratcon_datastore_push;
64   return ctx;
65 }
66 jlog_streamer_ctx_t *
67 stratcon_jlog_streamer_ctx_alloc(void) {
68   jlog_streamer_ctx_t *ctx;
69   ctx = calloc(1, sizeof(*ctx));
70   return ctx;
71 }
72 noit_connection_ctx_t *
73 noit_connection_ctx_alloc(void) {
74   noit_connection_ctx_t *ctx;
75   ctx = calloc(1, sizeof(*ctx));
76   return ctx;
77 }
78 int
79 noit_connection_reinitiate(eventer_t e, int mask, void *closure,
80                          struct timeval *now) {
81   noit_connection_ctx_t *ctx = closure;
82   ctx->timeout_event = NULL;
83   noit_connection_initiate_connection(closure);
84   return 0;
85 }
86 void
87 noit_connection_schedule_reattempt(noit_connection_ctx_t *ctx,
88                                    struct timeval *now) {
89   struct timeval __now, interval;
90   const char *v;
91   u_int32_t min_interval = 1000, max_interval = 8000;
92   if(noit_hash_retr_str(ctx->config,
93                         "reconnect_initial_interval",
94                         strlen("reconnect_initial_interval"),
95                         &v)) {
96     min_interval = MAX(atoi(v), 100); /* .1 second minimum */
97   }
98   if(noit_hash_retr_str(ctx->config,
99                         "reconnect_maximum_interval",
100                         strlen("reconnect_maximum_interval"),
101                         &v)) {
102     max_interval = MIN(atoi(v), 3600*1000); /* 1 hour maximum */
103   }
104   if(ctx->current_backoff == 0) ctx->current_backoff = min_interval;
105   else {
106     ctx->current_backoff *= 2;
107     ctx->current_backoff = MAX(min_interval, ctx->current_backoff);
108     ctx->current_backoff = MIN(max_interval, ctx->current_backoff);
109   }
110   if(!now) {
111     gettimeofday(&__now, NULL);
112     now = &__now;
113   }
114   interval.tv_sec = ctx->current_backoff / 1000;
115   interval.tv_usec = (ctx->current_backoff % 1000) * 1000;
116   noitL(noit_debug, "Next jlog_streamer attempt in %ums\n",
117         ctx->current_backoff);
118   if(ctx->timeout_event)
119     eventer_remove(ctx->timeout_event);
120   else
121     ctx->timeout_event = eventer_alloc();
122   ctx->timeout_event->callback = noit_connection_reinitiate;
123   ctx->timeout_event->closure = ctx;
124   ctx->timeout_event->mask = EVENTER_TIMER;
125   add_timeval(*now, interval, &ctx->timeout_event->whence);
126   eventer_add(ctx->timeout_event);
127 }
128 void
129 noit_connection_ctx_free(noit_connection_ctx_t *ctx) {
130   if(ctx->remote_cn) free(ctx->remote_cn);
131   if(ctx->timeout_event) {
132     eventer_remove(ctx->timeout_event);
133     eventer_free(ctx->timeout_event);
134   }
135   ctx->consumer_free(ctx->consumer_ctx);
136   free(ctx);
137 }
138 void
139 jlog_streamer_ctx_free(void *cl) {
140   jlog_streamer_ctx_t *ctx = cl;
141   if(ctx->buffer) free(ctx->buffer);
142   free(ctx);
143 }
144
145 #define Eread(a,b) e->opset->read(e->fd, (a), (b), &mask, e)
146 static int
147 __read_on_ctx(eventer_t e, jlog_streamer_ctx_t *ctx, int *newmask) {
148   int len, mask;
149   while(ctx->bytes_read < ctx->bytes_expected) {
150     len = Eread(ctx->buffer + ctx->bytes_read,
151                 ctx->bytes_expected - ctx->bytes_read);
152     if(len < 0) {
153       *newmask = mask;
154       return -1;
155     }
156     /* if we get 0 inside SSL, and there was a real error, we
157      * will actually get a -1 here.
158      * if(len == 0) return ctx->bytes_read;
159      */
160     ctx->bytes_read += len;
161   }
162   assert(ctx->bytes_read == ctx->bytes_expected);
163   return ctx->bytes_read;
164 }
165 #define FULLREAD(e,ctx,size) do { \
166   int mask, len; \
167   if(!ctx->bytes_expected) { \
168     ctx->bytes_expected = size; \
169     if(ctx->buffer) free(ctx->buffer); \
170     ctx->buffer = malloc(size + 1); \
171     if(ctx->buffer == NULL) { \
172       noitL(noit_error, "malloc(%lu) failed.\n", (long unsigned int)size + 1); \
173       goto socket_error; \
174     } \
175     ctx->buffer[size] = '\0'; \
176   } \
177   len = __read_on_ctx(e, ctx, &mask); \
178   if(len < 0) { \
179     if(errno == EAGAIN) return mask | EVENTER_EXCEPTION; \
180     noitL(noit_error, "SSL read error: %s\n", strerror(errno)); \
181     goto socket_error; \
182   } \
183   ctx->bytes_read = 0; \
184   ctx->bytes_expected = 0; \
185   if(len != size) { \
186     noitL(noit_error, "SSL short read [%d] (%d/%lu).  Reseting connection.\n", \
187           ctx->state, len, (long unsigned int)size); \
188     goto socket_error; \
189   } \
190 } while(0)
191
192 int
193 stratcon_jlog_recv_handler(eventer_t e, int mask, void *closure,
194                            struct timeval *now) {
195   noit_connection_ctx_t *nctx = closure;
196   jlog_streamer_ctx_t *ctx = nctx->consumer_ctx;
197   int len;
198   jlog_id n_chkpt;
199
200   if(mask & EVENTER_EXCEPTION || nctx->wants_shutdown) {
201     if(write(e->fd, e, 0) == -1)
202       noitL(noit_error, "socket error: %s\n", strerror(errno));
203  socket_error:
204     ctx->state = JLOG_STREAMER_WANT_INITIATE;
205     ctx->count = 0;
206     ctx->bytes_read = 0;
207     ctx->bytes_expected = 0;
208     if(ctx->buffer) free(ctx->buffer);
209     ctx->buffer = NULL;
210     noit_connection_schedule_reattempt(nctx, now);
211     eventer_remove_fd(e->fd);
212     e->opset->close(e->fd, &mask, e);
213     return 0;
214   }
215
216   while(1) {
217     switch(ctx->state) {
218       case JLOG_STREAMER_WANT_INITIATE:
219         len = e->opset->write(e->fd, &ctx->jlog_feed_cmd,
220                               sizeof(&ctx->jlog_feed_cmd),
221                               &mask, e);
222         if(len < 0) {
223           if(errno == EAGAIN) return mask | EVENTER_EXCEPTION;
224           goto socket_error;
225         }
226         if(len != sizeof(ctx->jlog_feed_cmd)) {
227           noitL(noit_error, "short write on initiating stream.\n");
228           goto socket_error;
229         }
230         ctx->state = JLOG_STREAMER_WANT_COUNT;
231         break;
232
233       case JLOG_STREAMER_WANT_COUNT:
234         FULLREAD(e, ctx, sizeof(u_int32_t));
235         memcpy(&ctx->count, ctx->buffer, sizeof(u_int32_t));
236         ctx->count = ntohl(ctx->count);
237         free(ctx->buffer); ctx->buffer = NULL;
238         ctx->state = JLOG_STREAMER_WANT_HEADER;
239         break;
240
241       case JLOG_STREAMER_WANT_HEADER:
242         if(ctx->count == 0) {
243           ctx->state = JLOG_STREAMER_WANT_COUNT;
244           break;
245         }
246         FULLREAD(e, ctx, sizeof(ctx->header));
247         memcpy(&ctx->header, ctx->buffer, sizeof(ctx->header));
248         ctx->header.chkpt.log = ntohl(ctx->header.chkpt.log);
249         ctx->header.chkpt.marker = ntohl(ctx->header.chkpt.marker);
250         ctx->header.tv_sec = ntohl(ctx->header.tv_sec);
251         ctx->header.tv_usec = ntohl(ctx->header.tv_usec);
252         ctx->header.message_len = ntohl(ctx->header.message_len);
253         free(ctx->buffer); ctx->buffer = NULL;
254         ctx->state = JLOG_STREAMER_WANT_BODY;
255         break;
256
257       case JLOG_STREAMER_WANT_BODY:
258         FULLREAD(e, ctx, (unsigned long)ctx->header.message_len);
259         ctx->push(DS_OP_INSERT, &nctx->r.remote, ctx->buffer);
260         /* Don't free the buffer, it's used by the datastore process. */
261         ctx->buffer = NULL;
262         ctx->count--;
263         if(ctx->count == 0) {
264           eventer_t completion_e;
265           eventer_remove_fd(e->fd);
266           completion_e = eventer_alloc();
267           memcpy(completion_e, e, sizeof(*e));
268           completion_e->mask = EVENTER_WRITE | EVENTER_EXCEPTION;
269           ctx->state = JLOG_STREAMER_WANT_CHKPT;
270           ctx->push(DS_OP_CHKPT, &nctx->r.remote, completion_e);
271           noitL(noit_debug, "Pushing batch asynch...\n");
272           return 0;
273         } else
274           ctx->state = JLOG_STREAMER_WANT_HEADER;
275         break;
276
277       case JLOG_STREAMER_WANT_CHKPT:
278         noitL(noit_debug, "Pushing checkpoint: [%u/%u]\n",
279               ctx->header.chkpt.log, ctx->header.chkpt.marker);
280         n_chkpt.log = htonl(ctx->header.chkpt.log);
281         n_chkpt.marker = htonl(ctx->header.chkpt.marker);
282
283         /* screw short writes.  I'd rather die than not write my data! */
284         len = e->opset->write(e->fd, &n_chkpt, sizeof(jlog_id),
285                               &mask, e);
286         if(len < 0) {
287           if(errno == EAGAIN) return mask | EVENTER_EXCEPTION;
288           goto socket_error;
289         }
290         if(len != sizeof(jlog_id)) {
291           noitL(noit_error, "short write on checkpointing stream.\n");
292           goto socket_error;
293         }
294         ctx->state = JLOG_STREAMER_WANT_COUNT;
295         break;
296     }
297   }
298   /* never get here */
299 }
300
301 int
302 noit_connection_ssl_upgrade(eventer_t e, int mask, void *closure,
303                             struct timeval *now) {
304   noit_connection_ctx_t *nctx = closure;
305   int rv;
306
307   rv = eventer_SSL_connect(e, &mask);
308   if(rv > 0) {
309     eventer_ssl_ctx_t *sslctx;
310     e->callback = nctx->consumer_callback;
311     /* We must make a copy of the acceptor_closure_t for each new
312      * connection.
313      */
314     if((sslctx = eventer_get_eventer_ssl_ctx(e)) != NULL) {
315       char *cn, *end;
316       cn = eventer_ssl_get_peer_subject(sslctx);
317       if(cn && (cn = strstr(cn, "CN=")) != NULL) {
318         cn += 3;
319         end = cn;
320         while(*end && *end != '/') end++;
321         nctx->remote_cn = malloc(end - cn + 1);
322         memcpy(nctx->remote_cn, cn, end - cn);
323         nctx->remote_cn[end-cn] = '\0';
324       }
325     }
326     return e->callback(e, mask, e->closure, now);
327   }
328   if(errno == EAGAIN) return mask | EVENTER_EXCEPTION;
329
330   noitL(noit_error, "jlog streamer SSL upgrade failed.\n");
331   eventer_remove_fd(e->fd);
332   e->opset->close(e->fd, &mask, e);
333   noit_connection_schedule_reattempt(nctx, now);
334   return 0;
335 }
336 int
337 noit_connection_complete_connect(eventer_t e, int mask, void *closure,
338                                  struct timeval *now) {
339   noit_connection_ctx_t *nctx = closure;
340   const char *cert, *key, *ca, *ciphers;
341   eventer_ssl_ctx_t *sslctx;
342
343   if(mask & EVENTER_EXCEPTION) {
344     if(write(e->fd, e, 0) == -1)
345       noitL(noit_error, "socket error: %s\n", strerror(errno));
346  connect_error:
347     eventer_remove_fd(e->fd);
348     e->opset->close(e->fd, &mask, e);
349     noit_connection_schedule_reattempt(nctx, now);
350     return 0;
351   }
352
353 #define SSLCONFGET(var,name) do { \
354   if(!noit_hash_retr_str(nctx->sslconfig, name, strlen(name), \
355                          &var)) var = NULL; } while(0)
356   SSLCONFGET(cert, "certificate_file");
357   SSLCONFGET(key, "key_file");
358   SSLCONFGET(ca, "ca_chain");
359   SSLCONFGET(ciphers, "ciphers");
360   sslctx = eventer_ssl_ctx_new(SSL_CLIENT, cert, key, ca, ciphers);
361   if(!sslctx) goto connect_error;
362
363   eventer_ssl_ctx_set_verify(sslctx, eventer_ssl_verify_cert,
364                              nctx->sslconfig);
365   EVENTER_ATTACH_SSL(e, sslctx);
366   e->callback = noit_connection_ssl_upgrade;
367   return e->callback(e, mask, closure, now);
368 }
369 static void
370 noit_connection_initiate_connection(noit_connection_ctx_t *nctx) {
371   struct timeval __now;
372   eventer_t e;
373   int rv, fd = -1;
374   long on;
375
376   /* Open a socket */
377   fd = socket(nctx->r.remote.sa_family, SOCK_STREAM, 0);
378   if(fd < 0) goto reschedule;
379
380   /* Make it non-blocking */
381   on = 1;
382   if(ioctl(fd, FIONBIO, &on)) goto reschedule;
383
384   /* Initiate a connection */
385   rv = connect(fd, &nctx->r.remote, nctx->remote_len);
386   if(rv == -1 && errno != EINPROGRESS) goto reschedule;
387
388   /* Register a handler for connection completion */
389   e = eventer_alloc();
390   e->fd = fd;
391   e->mask = EVENTER_READ | EVENTER_WRITE | EVENTER_EXCEPTION;
392   e->callback = noit_connection_complete_connect;
393   e->closure = nctx;
394   eventer_add(e);
395   return;
396
397  reschedule:
398   if(fd >= 0) close(fd);
399   gettimeofday(&__now, NULL);
400   noit_connection_schedule_reattempt(nctx, &__now);
401   return;
402 }
403
404 int
405 initiate_noit_connection(const char *host, unsigned short port,
406                          noit_hash_table *sslconfig, noit_hash_table *config,
407                          eventer_func_t handler, void *closure,
408                          void (*freefunc)(void *)) {
409   noit_connection_ctx_t *ctx;
410
411   int8_t family;
412   int rv;
413   union {
414     struct in_addr addr4;
415     struct in6_addr addr6;
416   } a;
417
418   if(host[0] == '/') {
419     family = AF_UNIX;
420   }
421   else {
422     family = AF_INET;
423     rv = inet_pton(family, host, &a);
424     if(rv != 1) {
425       family = AF_INET6;
426       rv = inet_pton(family, host, &a);
427       if(rv != 1) {
428         noitL(noit_stderr, "Cannot translate '%s' to IP\n", host);
429         return -1;
430       }
431     }
432   }
433
434   ctx = noit_connection_ctx_alloc();
435  
436   memset(&ctx->r, 0, sizeof(ctx->r));
437   if(family == AF_UNIX) {
438     struct sockaddr_un *s = &ctx->r.remote_un;
439     s->sun_family = AF_UNIX;
440     strncpy(s->sun_path, host, sizeof(s->sun_path)-1);
441     ctx->remote_len = sizeof(*s);
442   }
443   else if(family == AF_INET) {
444     struct sockaddr_in *s = &ctx->r.remote_in;
445     s->sin_family = family;
446     s->sin_port = htons(port);
447     memcpy(&s->sin_addr, &a, sizeof(struct in_addr));
448     ctx->remote_len = sizeof(*s);
449   }
450   else {
451     struct sockaddr_in6 *s = &ctx->r.remote_in6;
452     s->sin6_family = family;
453     s->sin6_port = htons(port);
454     memcpy(&s->sin6_addr, &a, sizeof(a));
455     ctx->remote_len = sizeof(*s);
456   }
457
458   if(ctx->sslconfig)
459     noit_hash_delete_all(ctx->sslconfig, free, free);
460   else
461     ctx->sslconfig = calloc(1, sizeof(noit_hash_table));
462   noit_hash_merge_as_dict(ctx->sslconfig, sslconfig);
463   if(ctx->config)
464     noit_hash_delete_all(ctx->config, free, free);
465   else
466     ctx->config = calloc(1, sizeof(noit_hash_table));
467   noit_hash_merge_as_dict(ctx->config, config);
468
469   ctx->consumer_callback = handler;
470   ctx->consumer_free = freefunc;
471   ctx->consumer_ctx = closure;
472   noit_connection_initiate_connection(ctx);
473   return 0;
474 }
475
476 void
477 stratcon_streamer_connection(const char *toplevel, const char *destination,
478                              eventer_func_t handler,
479                              void *(*handler_alloc)(void), void *handler_ctx,
480                              void (*handler_free)(void *)) {
481   int i, cnt = 0;
482   noit_conf_section_t *noit_configs;
483   char path[256];
484
485   snprintf(path, sizeof(path), "/%s/noits//noit", toplevel ? toplevel : "*");
486   noit_configs = noit_conf_get_sections(NULL, path, &cnt);
487   noitL(noit_error, "Found %d %s stanzas\n", cnt, path);
488   for(i=0; i<cnt; i++) {
489     char address[256];
490     unsigned short port;
491     int portint;
492     noit_hash_table *sslconfig, *config;
493
494     if(!noit_conf_get_stringbuf(noit_configs[i],
495                                 "ancestor-or-self::node()/@address",
496                                 address, sizeof(address))) {
497       noitL(noit_error, "address attribute missing in noit %d\n", i+1);
498       continue;
499     }
500     /* if destination is specified, exact match it */
501     if(destination && strcmp(address, destination)) continue;
502
503     if(!noit_conf_get_int(noit_configs[i],
504                           "ancestor-or-self::node()/@port", &portint))
505       portint = 0;
506     port = (unsigned short) portint;
507     if(address[0] != '/' && (portint == 0 || (port != portint))) {
508       /* UNIX sockets don't require a port (they'll ignore it if specified */
509       noitL(noit_stderr,
510             "Invalid port [%d] specified in stanza %d\n", port, i+1);
511       continue;
512     }
513     sslconfig = noit_conf_get_hash(noit_configs[i], "sslconfig");
514     config = noit_conf_get_hash(noit_configs[i], "config");
515
516     initiate_noit_connection(address, port, sslconfig, config,
517                              handler,
518                              handler_alloc ? handler_alloc() : handler_ctx,
519                              handler_free);
520   }
521 }
522 void
523 stratcon_jlog_streamer_reload(const char *toplevel) {
524   stratcon_streamer_connection(toplevel, NULL,
525                                stratcon_jlog_recv_handler,
526                                (void *(*)())stratcon_jlog_streamer_datastore_ctx_alloc,
527                                NULL,
528                                jlog_streamer_ctx_free);
529 }
530
531 void
532 stratcon_jlog_streamer_init(const char *toplevel) {
533   eventer_name_callback("noit_connection_reinitiate",
534                         noit_connection_reinitiate);
535   eventer_name_callback("stratcon_jlog_recv_handler",
536                         stratcon_jlog_recv_handler);
537   eventer_name_callback("noit_connection_ssl_upgrade",
538                         noit_connection_ssl_upgrade);
539   eventer_name_callback("noit_connection_complete_connect",
540                         noit_connection_complete_connect);
541   stratcon_jlog_streamer_reload(toplevel);
542 }
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