root/src/stratcon_jlog_streamer.c

Revision 9488f4575dc24414b3ed1696be5eea1db918f928, 18.2 kB (checked in by Theo Schlossnagle <jesus@omniti.com>, 5 years ago)

better debugging, refs #42

  • 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->remote_str) free(ctx->remote_str);
132   if(ctx->timeout_event) {
133     eventer_remove(ctx->timeout_event);
134     eventer_free(ctx->timeout_event);
135   }
136   ctx->consumer_free(ctx->consumer_ctx);
137   free(ctx);
138 }
139 void
140 jlog_streamer_ctx_free(void *cl) {
141   jlog_streamer_ctx_t *ctx = cl;
142   if(ctx->buffer) free(ctx->buffer);
143   free(ctx);
144 }
145
146 #define Eread(a,b) e->opset->read(e->fd, (a), (b), &mask, e)
147 static int
148 __read_on_ctx(eventer_t e, jlog_streamer_ctx_t *ctx, int *newmask) {
149   int len, mask;
150   while(ctx->bytes_read < ctx->bytes_expected) {
151     len = Eread(ctx->buffer + ctx->bytes_read,
152                 ctx->bytes_expected - ctx->bytes_read);
153     if(len < 0) {
154       *newmask = mask;
155       return -1;
156     }
157     /* if we get 0 inside SSL, and there was a real error, we
158      * will actually get a -1 here.
159      * if(len == 0) return ctx->bytes_read;
160      */
161     ctx->bytes_read += len;
162   }
163   assert(ctx->bytes_read == ctx->bytes_expected);
164   return ctx->bytes_read;
165 }
166 #define FULLREAD(e,ctx,size) do { \
167   int mask, len; \
168   if(!ctx->bytes_expected) { \
169     ctx->bytes_expected = size; \
170     if(ctx->buffer) free(ctx->buffer); \
171     ctx->buffer = malloc(size + 1); \
172     if(ctx->buffer == NULL) { \
173       noitL(noit_error, "malloc(%lu) failed.\n", (long unsigned int)size + 1); \
174       goto socket_error; \
175     } \
176     ctx->buffer[size] = '\0'; \
177   } \
178   len = __read_on_ctx(e, ctx, &mask); \
179   if(len < 0) { \
180     if(errno == EAGAIN) return mask | EVENTER_EXCEPTION; \
181     noitL(noit_error, "[%s] SSL read error: %s\n", nctx->remote_str, strerror(errno)); \
182     goto socket_error; \
183   } \
184   ctx->bytes_read = 0; \
185   ctx->bytes_expected = 0; \
186   if(len != size) { \
187     noitL(noit_error, "[%s] SSL short read [%d] (%d/%lu).  Reseting connection.\n", \
188           nctx->remote_str, ctx->state, len, (long unsigned int)size); \
189     goto socket_error; \
190   } \
191 } while(0)
192
193 int
194 stratcon_jlog_recv_handler(eventer_t e, int mask, void *closure,
195                            struct timeval *now) {
196   noit_connection_ctx_t *nctx = closure;
197   jlog_streamer_ctx_t *ctx = nctx->consumer_ctx;
198   int len;
199   jlog_id n_chkpt;
200
201   if(mask & EVENTER_EXCEPTION || nctx->wants_shutdown) {
202     if(write(e->fd, e, 0) == -1)
203       noitL(noit_error, "socket error: %s\n", strerror(errno));
204  socket_error:
205     ctx->state = JLOG_STREAMER_WANT_INITIATE;
206     ctx->count = 0;
207     ctx->bytes_read = 0;
208     ctx->bytes_expected = 0;
209     if(ctx->buffer) free(ctx->buffer);
210     ctx->buffer = NULL;
211     noit_connection_schedule_reattempt(nctx, now);
212     eventer_remove_fd(e->fd);
213     e->opset->close(e->fd, &mask, e);
214     return 0;
215   }
216
217   while(1) {
218     switch(ctx->state) {
219       case JLOG_STREAMER_WANT_INITIATE:
220         len = e->opset->write(e->fd, &ctx->jlog_feed_cmd,
221                               sizeof(ctx->jlog_feed_cmd),
222                               &mask, e);
223         if(len < 0) {
224           if(errno == EAGAIN) return mask | EVENTER_EXCEPTION;
225           goto socket_error;
226         }
227         if(len != sizeof(ctx->jlog_feed_cmd)) {
228           noitL(noit_error, "short write [%d/%d] on initiating stream.\n",
229                 (int)len, (int)sizeof(ctx->jlog_feed_cmd));
230           goto socket_error;
231         }
232         ctx->state = JLOG_STREAMER_WANT_COUNT;
233         break;
234
235       case JLOG_STREAMER_WANT_COUNT:
236         FULLREAD(e, ctx, sizeof(u_int32_t));
237         memcpy(&ctx->count, ctx->buffer, sizeof(u_int32_t));
238         ctx->count = ntohl(ctx->count);
239         free(ctx->buffer); ctx->buffer = NULL;
240         ctx->state = JLOG_STREAMER_WANT_HEADER;
241         break;
242
243       case JLOG_STREAMER_WANT_HEADER:
244         if(ctx->count == 0) {
245           ctx->state = JLOG_STREAMER_WANT_COUNT;
246           break;
247         }
248         FULLREAD(e, ctx, sizeof(ctx->header));
249         memcpy(&ctx->header, ctx->buffer, sizeof(ctx->header));
250         ctx->header.chkpt.log = ntohl(ctx->header.chkpt.log);
251         ctx->header.chkpt.marker = ntohl(ctx->header.chkpt.marker);
252         ctx->header.tv_sec = ntohl(ctx->header.tv_sec);
253         ctx->header.tv_usec = ntohl(ctx->header.tv_usec);
254         ctx->header.message_len = ntohl(ctx->header.message_len);
255         free(ctx->buffer); ctx->buffer = NULL;
256         ctx->state = JLOG_STREAMER_WANT_BODY;
257         break;
258
259       case JLOG_STREAMER_WANT_BODY:
260         FULLREAD(e, ctx, (unsigned long)ctx->header.message_len);
261         if(ctx->header.message_len > 0)
262           ctx->push(DS_OP_INSERT, &nctx->r.remote, ctx->buffer);
263         /* Don't free the buffer, it's used by the datastore process. */
264         ctx->buffer = NULL;
265         ctx->count--;
266         if(ctx->count == 0) {
267           eventer_t completion_e;
268           eventer_remove_fd(e->fd);
269           completion_e = eventer_alloc();
270           memcpy(completion_e, e, sizeof(*e));
271           completion_e->mask = EVENTER_WRITE | EVENTER_EXCEPTION;
272           ctx->state = JLOG_STREAMER_WANT_CHKPT;
273           ctx->push(DS_OP_CHKPT, &nctx->r.remote, completion_e);
274           noitL(noit_debug, "Pushing batch asynch...\n");
275           return 0;
276         } else
277           ctx->state = JLOG_STREAMER_WANT_HEADER;
278         break;
279
280       case JLOG_STREAMER_WANT_CHKPT:
281         noitL(noit_debug, "Pushing checkpoint: [%u/%u]\n",
282               ctx->header.chkpt.log, ctx->header.chkpt.marker);
283         n_chkpt.log = htonl(ctx->header.chkpt.log);
284         n_chkpt.marker = htonl(ctx->header.chkpt.marker);
285
286         /* screw short writes.  I'd rather die than not write my data! */
287         len = e->opset->write(e->fd, &n_chkpt, sizeof(jlog_id),
288                               &mask, e);
289         if(len < 0) {
290           if(errno == EAGAIN) return mask | EVENTER_EXCEPTION;
291           goto socket_error;
292         }
293         if(len != sizeof(jlog_id)) {
294           noitL(noit_error, "short write on checkpointing stream.\n");
295           goto socket_error;
296         }
297         ctx->state = JLOG_STREAMER_WANT_COUNT;
298         break;
299     }
300   }
301   /* never get here */
302 }
303
304 int
305 noit_connection_ssl_upgrade(eventer_t e, int mask, void *closure,
306                             struct timeval *now) {
307   noit_connection_ctx_t *nctx = closure;
308   int rv;
309
310   rv = eventer_SSL_connect(e, &mask);
311   if(rv > 0) {
312     eventer_ssl_ctx_t *sslctx;
313     e->callback = nctx->consumer_callback;
314     /* We must make a copy of the acceptor_closure_t for each new
315      * connection.
316      */
317     if((sslctx = eventer_get_eventer_ssl_ctx(e)) != NULL) {
318       char *cn, *end;
319       cn = eventer_ssl_get_peer_subject(sslctx);
320       if(cn && (cn = strstr(cn, "CN=")) != NULL) {
321         cn += 3;
322         end = cn;
323         while(*end && *end != '/') end++;
324         nctx->remote_cn = malloc(end - cn + 1);
325         memcpy(nctx->remote_cn, cn, end - cn);
326         nctx->remote_cn[end-cn] = '\0';
327       }
328     }
329     return e->callback(e, mask, e->closure, now);
330   }
331   if(errno == EAGAIN) return mask | EVENTER_EXCEPTION;
332
333   noitL(noit_error, "jlog streamer SSL upgrade failed.\n");
334   eventer_remove_fd(e->fd);
335   e->opset->close(e->fd, &mask, e);
336   noit_connection_schedule_reattempt(nctx, now);
337   return 0;
338 }
339 int
340 noit_connection_complete_connect(eventer_t e, int mask, void *closure,
341                                  struct timeval *now) {
342   noit_connection_ctx_t *nctx = closure;
343   const char *cert, *key, *ca, *ciphers;
344   eventer_ssl_ctx_t *sslctx;
345
346   if(mask & EVENTER_EXCEPTION) {
347     if(write(e->fd, e, 0) == -1)
348       noitL(noit_error, "socket error: %s\n", strerror(errno));
349  connect_error:
350     eventer_remove_fd(e->fd);
351     e->opset->close(e->fd, &mask, e);
352     noit_connection_schedule_reattempt(nctx, now);
353     return 0;
354   }
355
356 #define SSLCONFGET(var,name) do { \
357   if(!noit_hash_retr_str(nctx->sslconfig, name, strlen(name), \
358                          &var)) var = NULL; } while(0)
359   SSLCONFGET(cert, "certificate_file");
360   SSLCONFGET(key, "key_file");
361   SSLCONFGET(ca, "ca_chain");
362   SSLCONFGET(ciphers, "ciphers");
363   sslctx = eventer_ssl_ctx_new(SSL_CLIENT, cert, key, ca, ciphers);
364   if(!sslctx) goto connect_error;
365
366   eventer_ssl_ctx_set_verify(sslctx, eventer_ssl_verify_cert,
367                              nctx->sslconfig);
368   EVENTER_ATTACH_SSL(e, sslctx);
369   e->callback = noit_connection_ssl_upgrade;
370   return e->callback(e, mask, closure, now);
371 }
372 static void
373 noit_connection_initiate_connection(noit_connection_ctx_t *nctx) {
374   struct timeval __now;
375   eventer_t e;
376   int rv, fd = -1;
377   long on;
378
379   /* Open a socket */
380   fd = socket(nctx->r.remote.sa_family, SOCK_STREAM, 0);
381   if(fd < 0) goto reschedule;
382
383   /* Make it non-blocking */
384   on = 1;
385   if(ioctl(fd, FIONBIO, &on)) goto reschedule;
386
387   /* Initiate a connection */
388   rv = connect(fd, &nctx->r.remote, nctx->remote_len);
389   if(rv == -1 && errno != EINPROGRESS) goto reschedule;
390
391   /* Register a handler for connection completion */
392   e = eventer_alloc();
393   e->fd = fd;
394   e->mask = EVENTER_READ | EVENTER_WRITE | EVENTER_EXCEPTION;
395   e->callback = noit_connection_complete_connect;
396   e->closure = nctx;
397   eventer_add(e);
398   return;
399
400  reschedule:
401   if(fd >= 0) close(fd);
402   gettimeofday(&__now, NULL);
403   noit_connection_schedule_reattempt(nctx, &__now);
404   return;
405 }
406
407 int
408 initiate_noit_connection(const char *host, unsigned short port,
409                          noit_hash_table *sslconfig, noit_hash_table *config,
410                          eventer_func_t handler, void *closure,
411                          void (*freefunc)(void *)) {
412   noit_connection_ctx_t *ctx;
413
414   int8_t family;
415   int rv;
416   union {
417     struct in_addr addr4;
418     struct in6_addr addr6;
419   } a;
420
421   if(host[0] == '/') {
422     family = AF_UNIX;
423   }
424   else {
425     family = AF_INET;
426     rv = inet_pton(family, host, &a);
427     if(rv != 1) {
428       family = AF_INET6;
429       rv = inet_pton(family, host, &a);
430       if(rv != 1) {
431         noitL(noit_stderr, "Cannot translate '%s' to IP\n", host);
432         return -1;
433       }
434     }
435   }
436
437   ctx = noit_connection_ctx_alloc();
438   ctx->remote_str = calloc(1, strlen(host) + 7);
439   snprintf(ctx->remote_str, strlen(host) + 7,
440            "%s:%d", host, port);
441  
442   memset(&ctx->r, 0, sizeof(ctx->r));
443   if(family == AF_UNIX) {
444     struct sockaddr_un *s = &ctx->r.remote_un;
445     s->sun_family = AF_UNIX;
446     strncpy(s->sun_path, host, sizeof(s->sun_path)-1);
447     ctx->remote_len = sizeof(*s);
448   }
449   else if(family == AF_INET) {
450     struct sockaddr_in *s = &ctx->r.remote_in;
451     s->sin_family = family;
452     s->sin_port = htons(port);
453     memcpy(&s->sin_addr, &a, sizeof(struct in_addr));
454     ctx->remote_len = sizeof(*s);
455   }
456   else {
457     struct sockaddr_in6 *s = &ctx->r.remote_in6;
458     s->sin6_family = family;
459     s->sin6_port = htons(port);
460     memcpy(&s->sin6_addr, &a, sizeof(a));
461     ctx->remote_len = sizeof(*s);
462   }
463
464   if(ctx->sslconfig)
465     noit_hash_delete_all(ctx->sslconfig, free, free);
466   else
467     ctx->sslconfig = calloc(1, sizeof(noit_hash_table));
468   noit_hash_merge_as_dict(ctx->sslconfig, sslconfig);
469   if(ctx->config)
470     noit_hash_delete_all(ctx->config, free, free);
471   else
472     ctx->config = calloc(1, sizeof(noit_hash_table));
473   noit_hash_merge_as_dict(ctx->config, config);
474
475   ctx->consumer_callback = handler;
476   ctx->consumer_free = freefunc;
477   ctx->consumer_ctx = closure;
478   noit_connection_initiate_connection(ctx);
479   return 0;
480 }
481
482 void
483 stratcon_streamer_connection(const char *toplevel, const char *destination,
484                              eventer_func_t handler,
485                              void *(*handler_alloc)(void), void *handler_ctx,
486                              void (*handler_free)(void *)) {
487   int i, cnt = 0;
488   noit_conf_section_t *noit_configs;
489   char path[256];
490
491   snprintf(path, sizeof(path), "/%s/noits//noit", toplevel ? toplevel : "*");
492   noit_configs = noit_conf_get_sections(NULL, path, &cnt);
493   noitL(noit_error, "Found %d %s stanzas\n", cnt, path);
494   for(i=0; i<cnt; i++) {
495     char address[256];
496     unsigned short port;
497     int portint;
498     noit_hash_table *sslconfig, *config;
499
500     if(!noit_conf_get_stringbuf(noit_configs[i],
501                                 "ancestor-or-self::node()/@address",
502                                 address, sizeof(address))) {
503       noitL(noit_error, "address attribute missing in noit %d\n", i+1);
504       continue;
505     }
506     /* if destination is specified, exact match it */
507     if(destination && strcmp(address, destination)) continue;
508
509     if(!noit_conf_get_int(noit_configs[i],
510                           "ancestor-or-self::node()/@port", &portint))
511       portint = 0;
512     port = (unsigned short) portint;
513     if(address[0] != '/' && (portint == 0 || (port != portint))) {
514       /* UNIX sockets don't require a port (they'll ignore it if specified */
515       noitL(noit_stderr,
516             "Invalid port [%d] specified in stanza %d\n", port, i+1);
517       continue;
518     }
519     sslconfig = noit_conf_get_hash(noit_configs[i], "sslconfig");
520     config = noit_conf_get_hash(noit_configs[i], "config");
521
522 noitL(noit_error, "initiating to %s\n", address);
523     initiate_noit_connection(address, port, sslconfig, config,
524                              handler,
525                              handler_alloc ? handler_alloc() : handler_ctx,
526                              handler_free);
527   }
528 }
529 void
530 stratcon_jlog_streamer_reload(const char *toplevel) {
531   stratcon_streamer_connection(toplevel, NULL,
532                                stratcon_jlog_recv_handler,
533                                (void *(*)())stratcon_jlog_streamer_datastore_ctx_alloc,
534                                NULL,
535                                jlog_streamer_ctx_free);
536 }
537
538 void
539 stratcon_jlog_streamer_init(const char *toplevel) {
540   eventer_name_callback("noit_connection_reinitiate",
541                         noit_connection_reinitiate);
542   eventer_name_callback("stratcon_jlog_recv_handler",
543                         stratcon_jlog_recv_handler);
544   eventer_name_callback("noit_connection_ssl_upgrade",
545                         noit_connection_ssl_upgrade);
546   eventer_name_callback("noit_connection_complete_connect",
547                         noit_connection_complete_connect);
548   stratcon_jlog_streamer_reload(toplevel);
549 }
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