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f740a279 | 1 | |
2 | /* | |
4f0ef8e8 | 3 | * $Id: helper.cc,v 1.84 2007/05/09 09:07:39 wessels Exp $ |
f740a279 | 4 | * |
17bb3486 | 5 | * DEBUG: section 84 Helper process maintenance |
f740a279 | 6 | * AUTHOR: Harvest Derived? |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
f740a279 | 9 | * ---------------------------------------------------------- |
10 | * | |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
f740a279 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
33 | * | |
34 | */ | |
35 | ||
74addf6c | 36 | #include "squid.h" |
51ee7c82 | 37 | #include "helper.h" |
985c86bc | 38 | #include "SquidTime.h" |
e6ccf245 | 39 | #include "Store.h" |
42679bd6 | 40 | #include "comm.h" |
0eb49b6d | 41 | #include "MemBuf.h" |
d295d770 | 42 | #include "wordlist.h" |
74addf6c | 43 | |
44 | #define HELPER_MAX_ARGS 64 | |
45 | ||
c4b7a5a9 | 46 | static IOCB helperHandleRead; |
47 | static IOCB helperStatefulHandleRead; | |
1f5f60dd | 48 | static PF helperServerFree; |
94439e4e | 49 | static PF helperStatefulServerFree; |
74addf6c | 50 | static void Enqueue(helper * hlp, helper_request *); |
51 | static helper_request *Dequeue(helper * hlp); | |
94439e4e | 52 | static helper_stateful_request *StatefulDequeue(statefulhelper * hlp); |
74addf6c | 53 | static helper_server *GetFirstAvailable(helper * hlp); |
94439e4e | 54 | static helper_stateful_server *StatefulGetFirstAvailable(statefulhelper * hlp); |
74addf6c | 55 | static void helperDispatch(helper_server * srv, helper_request * r); |
94439e4e | 56 | static void helperStatefulDispatch(helper_stateful_server * srv, helper_stateful_request * r); |
74addf6c | 57 | static void helperKickQueue(helper * hlp); |
94439e4e | 58 | static void helperStatefulKickQueue(statefulhelper * hlp); |
74addf6c | 59 | static void helperRequestFree(helper_request * r); |
94439e4e | 60 | static void helperStatefulRequestFree(helper_stateful_request * r); |
61 | static void StatefulEnqueue(statefulhelper * hlp, helper_stateful_request * r); | |
62 | static helper_stateful_request *StatefulServerDequeue(helper_stateful_server * srv); | |
63 | static void StatefulServerEnqueue(helper_stateful_server * srv, helper_stateful_request * r); | |
64 | static void helperStatefulServerKickQueue(helper_stateful_server * srv); | |
9522b380 | 65 | static bool helperStartStats(StoreEntry *sentry, void *hlp, const char *label); |
66 | ||
74addf6c | 67 | |
aa839030 | 68 | CBDATA_TYPE(helper); |
69 | CBDATA_TYPE(helper_server); | |
70 | CBDATA_TYPE(statefulhelper); | |
71 | CBDATA_TYPE(helper_stateful_server); | |
72 | ||
74addf6c | 73 | void |
74 | helperOpenServers(helper * hlp) | |
75 | { | |
76 | char *s; | |
77 | char *progname; | |
78 | char *shortname; | |
79 | char *procname; | |
a2c963ae | 80 | const char *args[HELPER_MAX_ARGS]; |
74addf6c | 81 | char fd_note_buf[FD_DESC_SZ]; |
82 | helper_server *srv; | |
83 | int nargs = 0; | |
84 | int k; | |
b5d712b5 | 85 | pid_t pid; |
74addf6c | 86 | int rfd; |
87 | int wfd; | |
b5d712b5 | 88 | void * hIpc; |
74addf6c | 89 | wordlist *w; |
62e76326 | 90 | |
74addf6c | 91 | if (hlp->cmdline == NULL) |
62e76326 | 92 | return; |
93 | ||
74addf6c | 94 | progname = hlp->cmdline->key; |
62e76326 | 95 | |
74addf6c | 96 | if ((s = strrchr(progname, '/'))) |
62e76326 | 97 | shortname = xstrdup(s + 1); |
74addf6c | 98 | else |
62e76326 | 99 | shortname = xstrdup(progname); |
100 | ||
bf8fe701 | 101 | debugs(84, 1, "helperOpenServers: Starting " << hlp->n_to_start << " '" << shortname << "' processes"); |
62e76326 | 102 | |
e6ccf245 | 103 | procname = (char *)xmalloc(strlen(shortname) + 3); |
62e76326 | 104 | |
74addf6c | 105 | snprintf(procname, strlen(shortname) + 3, "(%s)", shortname); |
62e76326 | 106 | |
74addf6c | 107 | args[nargs++] = procname; |
62e76326 | 108 | |
74addf6c | 109 | for (w = hlp->cmdline->next; w && nargs < HELPER_MAX_ARGS; w = w->next) |
62e76326 | 110 | args[nargs++] = w->key; |
111 | ||
74addf6c | 112 | args[nargs++] = NULL; |
62e76326 | 113 | |
74addf6c | 114 | assert(nargs <= HELPER_MAX_ARGS); |
62e76326 | 115 | |
74addf6c | 116 | for (k = 0; k < hlp->n_to_start; k++) { |
62e76326 | 117 | getCurrentTime(); |
118 | rfd = wfd = -1; | |
b5d712b5 | 119 | pid = ipcCreate(hlp->ipc_type, |
120 | progname, | |
121 | args, | |
122 | shortname, | |
123 | &rfd, | |
124 | &wfd, | |
125 | &hIpc); | |
126 | ||
127 | if (pid < 0) { | |
bf8fe701 | 128 | debugs(84, 1, "WARNING: Cannot run '" << progname << "' process."); |
62e76326 | 129 | continue; |
130 | } | |
131 | ||
132 | hlp->n_running++; | |
d8f10d6a | 133 | hlp->n_active++; |
b5d712b5 | 134 | CBDATA_INIT_TYPE(helper_server); |
62e76326 | 135 | srv = cbdataAlloc(helper_server); |
b5d712b5 | 136 | srv->hIpc = hIpc; |
137 | srv->pid = pid; | |
62e76326 | 138 | srv->index = k; |
139 | srv->rfd = rfd; | |
140 | srv->wfd = wfd; | |
07eca7e0 | 141 | srv->rbuf = (char *)memAllocBuf(8192, &srv->rbuf_sz); |
90bed1c4 | 142 | srv->wqueue = new MemBuf; |
07eca7e0 | 143 | srv->roffset = 0; |
144 | srv->requests = (helper_request **)xcalloc(hlp->concurrency ? hlp->concurrency : 1, sizeof(*srv->requests)); | |
62e76326 | 145 | srv->parent = cbdataReference(hlp); |
146 | dlinkAddTail(srv, &srv->link, &hlp->servers); | |
147 | ||
148 | if (rfd == wfd) { | |
149 | snprintf(fd_note_buf, FD_DESC_SZ, "%s #%d", shortname, k + 1); | |
150 | fd_note(rfd, fd_note_buf); | |
151 | } else { | |
152 | snprintf(fd_note_buf, FD_DESC_SZ, "reading %s #%d", shortname, k + 1); | |
153 | fd_note(rfd, fd_note_buf); | |
154 | snprintf(fd_note_buf, FD_DESC_SZ, "writing %s #%d", shortname, k + 1); | |
155 | fd_note(wfd, fd_note_buf); | |
156 | } | |
157 | ||
158 | commSetNonBlocking(rfd); | |
159 | ||
160 | if (wfd != rfd) | |
161 | commSetNonBlocking(wfd); | |
162 | ||
163 | comm_add_close_handler(rfd, helperServerFree, srv); | |
07eca7e0 | 164 | |
165 | comm_read(srv->rfd, srv->rbuf, srv->rbuf_sz - 1, helperHandleRead, srv); | |
74addf6c | 166 | } |
62e76326 | 167 | |
5ea33fce | 168 | hlp->last_restart = squid_curtime; |
74addf6c | 169 | safe_free(shortname); |
170 | safe_free(procname); | |
838b993c | 171 | helperKickQueue(hlp); |
74addf6c | 172 | } |
173 | ||
4f0ef8e8 | 174 | /* |
175 | * DPW 2007-05-08 | |
176 | * | |
177 | * helperStatefulOpenServers: create the stateful child helper processes | |
178 | */ | |
94439e4e | 179 | void |
180 | helperStatefulOpenServers(statefulhelper * hlp) | |
181 | { | |
94439e4e | 182 | char *shortname; |
a2c963ae | 183 | const char *args[HELPER_MAX_ARGS]; |
94439e4e | 184 | char fd_note_buf[FD_DESC_SZ]; |
94439e4e | 185 | int nargs = 0; |
62e76326 | 186 | |
94439e4e | 187 | if (hlp->cmdline == NULL) |
62e76326 | 188 | return; |
189 | ||
4f0ef8e8 | 190 | char *progname = hlp->cmdline->key; |
62e76326 | 191 | |
4f0ef8e8 | 192 | char *s; |
94439e4e | 193 | if ((s = strrchr(progname, '/'))) |
62e76326 | 194 | shortname = xstrdup(s + 1); |
94439e4e | 195 | else |
62e76326 | 196 | shortname = xstrdup(progname); |
197 | ||
bf8fe701 | 198 | debugs(84, 1, "helperStatefulOpenServers: Starting " << hlp->n_to_start << " '" << shortname << "' processes"); |
62e76326 | 199 | |
4f0ef8e8 | 200 | char *procname = (char *)xmalloc(strlen(shortname) + 3); |
62e76326 | 201 | |
94439e4e | 202 | snprintf(procname, strlen(shortname) + 3, "(%s)", shortname); |
62e76326 | 203 | |
94439e4e | 204 | args[nargs++] = procname; |
62e76326 | 205 | |
4f0ef8e8 | 206 | for (wordlist *w = hlp->cmdline->next; w && nargs < HELPER_MAX_ARGS; w = w->next) |
62e76326 | 207 | args[nargs++] = w->key; |
208 | ||
94439e4e | 209 | args[nargs++] = NULL; |
62e76326 | 210 | |
94439e4e | 211 | assert(nargs <= HELPER_MAX_ARGS); |
62e76326 | 212 | |
4f0ef8e8 | 213 | for (int k = 0; k < hlp->n_to_start; k++) { |
62e76326 | 214 | getCurrentTime(); |
4f0ef8e8 | 215 | int rfd = -1; |
216 | int wfd = -1; | |
217 | void * hIpc; | |
218 | pid_t pid = ipcCreate(hlp->ipc_type, | |
b5d712b5 | 219 | progname, |
220 | args, | |
221 | shortname, | |
222 | &rfd, | |
223 | &wfd, | |
224 | &hIpc); | |
225 | ||
226 | if (pid < 0) { | |
bf8fe701 | 227 | debugs(84, 1, "WARNING: Cannot run '" << progname << "' process."); |
62e76326 | 228 | continue; |
229 | } | |
230 | ||
231 | hlp->n_running++; | |
d8f10d6a | 232 | hlp->n_active++; |
b5d712b5 | 233 | CBDATA_INIT_TYPE(helper_stateful_server); |
4f0ef8e8 | 234 | helper_stateful_server *srv = cbdataAlloc(helper_stateful_server); |
b5d712b5 | 235 | srv->hIpc = hIpc; |
236 | srv->pid = pid; | |
62e76326 | 237 | srv->flags.reserved = S_HELPER_FREE; |
238 | srv->deferred_requests = 0; | |
239 | srv->stats.deferbyfunc = 0; | |
240 | srv->stats.deferbycb = 0; | |
241 | srv->stats.submits = 0; | |
242 | srv->stats.releases = 0; | |
243 | srv->index = k; | |
244 | srv->rfd = rfd; | |
245 | srv->wfd = wfd; | |
07eca7e0 | 246 | srv->rbuf = (char *)memAllocBuf(8192, &srv->rbuf_sz); |
247 | srv->roffset = 0; | |
62e76326 | 248 | srv->parent = cbdataReference(hlp); |
249 | ||
250 | if (hlp->datapool != NULL) | |
b001e822 | 251 | srv->data = hlp->datapool->alloc(); |
62e76326 | 252 | |
253 | dlinkAddTail(srv, &srv->link, &hlp->servers); | |
254 | ||
255 | if (rfd == wfd) { | |
256 | snprintf(fd_note_buf, FD_DESC_SZ, "%s #%d", shortname, k + 1); | |
257 | fd_note(rfd, fd_note_buf); | |
258 | } else { | |
259 | snprintf(fd_note_buf, FD_DESC_SZ, "reading %s #%d", shortname, k + 1); | |
260 | fd_note(rfd, fd_note_buf); | |
261 | snprintf(fd_note_buf, FD_DESC_SZ, "writing %s #%d", shortname, k + 1); | |
262 | fd_note(wfd, fd_note_buf); | |
263 | } | |
264 | ||
265 | commSetNonBlocking(rfd); | |
266 | ||
267 | if (wfd != rfd) | |
268 | commSetNonBlocking(wfd); | |
269 | ||
270 | comm_add_close_handler(rfd, helperStatefulServerFree, srv); | |
07eca7e0 | 271 | |
272 | comm_read(srv->rfd, srv->rbuf, srv->rbuf_sz - 1, helperStatefulHandleRead, srv); | |
273 | ||
94439e4e | 274 | } |
62e76326 | 275 | |
5ea33fce | 276 | hlp->last_restart = squid_curtime; |
94439e4e | 277 | safe_free(shortname); |
278 | safe_free(procname); | |
279 | helperStatefulKickQueue(hlp); | |
280 | } | |
281 | ||
282 | ||
74addf6c | 283 | void |
284 | helperSubmit(helper * hlp, const char *buf, HLPCB * callback, void *data) | |
285 | { | |
5b5f9257 | 286 | if (hlp == NULL) { |
bf8fe701 | 287 | debugs(84, 3, "helperSubmit: hlp == NULL"); |
62e76326 | 288 | callback(data, NULL); |
289 | return; | |
5b5f9257 | 290 | } |
62e76326 | 291 | |
eff7218b | 292 | helper_request *r = new helper_request; |
293 | helper_server *srv; | |
294 | ||
74addf6c | 295 | r->callback = callback; |
fa80a8ef | 296 | r->data = cbdataReference(data); |
74addf6c | 297 | r->buf = xstrdup(buf); |
62e76326 | 298 | |
74addf6c | 299 | if ((srv = GetFirstAvailable(hlp))) |
62e76326 | 300 | helperDispatch(srv, r); |
74addf6c | 301 | else |
62e76326 | 302 | Enqueue(hlp, r); |
303 | ||
bf8fe701 | 304 | debugs(84, 9, "helperSubmit: " << buf); |
94439e4e | 305 | } |
306 | ||
721b0310 | 307 | /* lastserver = "server last used as part of a deferred or reserved |
308 | * request sequence" | |
309 | */ | |
94439e4e | 310 | void |
311 | helperStatefulSubmit(statefulhelper * hlp, const char *buf, HLPSCB * callback, void *data, helper_stateful_server * lastserver) | |
312 | { | |
94439e4e | 313 | if (hlp == NULL) { |
bf8fe701 | 314 | debugs(84, 3, "helperStatefulSubmit: hlp == NULL"); |
62e76326 | 315 | callback(data, 0, NULL); |
316 | return; | |
94439e4e | 317 | } |
62e76326 | 318 | |
eff7218b | 319 | helper_stateful_request *r = new helper_stateful_request; |
eff7218b | 320 | |
94439e4e | 321 | r->callback = callback; |
fa80a8ef | 322 | r->data = cbdataReference(data); |
62e76326 | 323 | |
721b0310 | 324 | if (buf != NULL) { |
62e76326 | 325 | r->buf = xstrdup(buf); |
326 | r->placeholder = 0; | |
721b0310 | 327 | } else { |
62e76326 | 328 | r->buf = NULL; |
329 | r->placeholder = 1; | |
721b0310 | 330 | } |
62e76326 | 331 | |
94439e4e | 332 | if ((buf != NULL) && lastserver) { |
bf8fe701 | 333 | debugs(84, 5, "StatefulSubmit with lastserver " << lastserver); |
62e76326 | 334 | /* the queue doesn't count for this assert because queued requests |
335 | * have already gone through here and been tested. | |
336 | * It's legal to have deferred_requests == 0 and queue entries | |
337 | * and status of S_HELPEER_DEFERRED. | |
338 | * BUT: It's not legal to submit a new request w/lastserver in | |
339 | * that state. | |
340 | */ | |
341 | assert(!(lastserver->deferred_requests == 0 && | |
342 | lastserver->flags.reserved == S_HELPER_DEFERRED)); | |
343 | ||
344 | if (lastserver->flags.reserved != S_HELPER_RESERVED) { | |
345 | lastserver->stats.submits++; | |
346 | lastserver->deferred_requests--; | |
347 | } | |
348 | ||
349 | if (!(lastserver->request)) { | |
bf8fe701 | 350 | debugs(84, 5, "StatefulSubmit dispatching"); |
62e76326 | 351 | helperStatefulDispatch(lastserver, r); |
352 | } else { | |
bf8fe701 | 353 | debugs(84, 5, "StatefulSubmit queuing"); |
62e76326 | 354 | StatefulServerEnqueue(lastserver, r); |
355 | } | |
94439e4e | 356 | } else { |
4f0ef8e8 | 357 | helper_stateful_server *srv; |
62e76326 | 358 | if ((srv = StatefulGetFirstAvailable(hlp))) { |
359 | helperStatefulDispatch(srv, r); | |
360 | } else | |
361 | StatefulEnqueue(hlp, r); | |
94439e4e | 362 | } |
62e76326 | 363 | |
bf8fe701 | 364 | debugs(84, 9, "helperStatefulSubmit: placeholder: '" << r->placeholder << "', buf '" << buf << "'."); |
94439e4e | 365 | } |
366 | ||
4f0ef8e8 | 367 | /* |
368 | * helperStatefulDefer | |
369 | * | |
370 | * find and add a deferred request to a helper | |
371 | */ | |
94439e4e | 372 | helper_stateful_server * |
373 | helperStatefulDefer(statefulhelper * hlp) | |
94439e4e | 374 | { |
4f0ef8e8 | 375 | if (hlp == NULL) { |
bf8fe701 | 376 | debugs(84, 3, "helperStatefulDefer: hlp == NULL"); |
62e76326 | 377 | return NULL; |
94439e4e | 378 | } |
62e76326 | 379 | |
4f0ef8e8 | 380 | debugs(84, 5, "helperStatefulDefer: Running servers " << hlp->n_running); |
62e76326 | 381 | |
4f0ef8e8 | 382 | if (hlp->n_running == 0) { |
bf8fe701 | 383 | debugs(84, 1, "helperStatefulDefer: No running servers!. "); |
62e76326 | 384 | return NULL; |
94439e4e | 385 | } |
62e76326 | 386 | |
4f0ef8e8 | 387 | helper_stateful_server *rv = StatefulGetFirstAvailable(hlp); |
62e76326 | 388 | |
4f0ef8e8 | 389 | if (rv == NULL) { |
62e76326 | 390 | /* |
391 | * all currently busy; loop through servers and find server | |
392 | * with the shortest queue | |
393 | */ | |
394 | ||
4f0ef8e8 | 395 | for (dlink_node *n = hlp->servers.head; n != NULL; n = n->next) { |
396 | helper_stateful_server *srv = (helper_stateful_server *)n->data; | |
62e76326 | 397 | |
398 | if (srv->flags.reserved == S_HELPER_RESERVED) | |
399 | continue; | |
400 | ||
b902a58c | 401 | if (!srv->flags.shutdown) |
62e76326 | 402 | continue; |
403 | ||
404 | if ((hlp->IsAvailable != NULL) && (srv->data != NULL) && | |
405 | !(hlp->IsAvailable(srv->data))) | |
406 | continue; | |
407 | ||
408 | if ((rv != NULL) && (rv->deferred_requests < srv->deferred_requests)) | |
409 | continue; | |
410 | ||
411 | rv = srv; | |
412 | } | |
0a706c69 | 413 | } |
62e76326 | 414 | |
4f0ef8e8 | 415 | if (rv == NULL) { |
bf8fe701 | 416 | debugs(84, 1, "helperStatefulDefer: None available."); |
62e76326 | 417 | return NULL; |
94439e4e | 418 | } |
62e76326 | 419 | |
60d096f4 | 420 | /* consistency check: |
421 | * when the deferred count is 0, | |
422 | * submits + releases == deferbyfunc + deferbycb | |
423 | * Or in english, when there are no deferred requests, the amount | |
424 | * we have submitted to the queue or cancelled must equal the amount | |
425 | * we have said we wanted to be able to submit or cancel | |
426 | */ | |
427 | if (rv->deferred_requests == 0) | |
62e76326 | 428 | assert(rv->stats.submits + rv->stats.releases == |
429 | rv->stats.deferbyfunc + rv->stats.deferbycb); | |
60d096f4 | 430 | |
94439e4e | 431 | rv->flags.reserved = S_HELPER_DEFERRED; |
62e76326 | 432 | |
94439e4e | 433 | rv->deferred_requests++; |
62e76326 | 434 | |
60d096f4 | 435 | rv->stats.deferbyfunc++; |
62e76326 | 436 | |
94439e4e | 437 | return rv; |
438 | } | |
439 | ||
440 | void | |
441 | helperStatefulReset(helper_stateful_server * srv) | |
62e76326 | 442 | /* puts this helper back in the queue. the calling app is required to |
94439e4e | 443 | * manage the state in the helper. |
444 | */ | |
445 | { | |
446 | statefulhelper *hlp = srv->parent; | |
4f0ef8e8 | 447 | helper_stateful_request *r = srv->request; |
62e76326 | 448 | |
4f0ef8e8 | 449 | if (r != NULL) { |
62e76326 | 450 | /* reset attempt DURING an outstaning request */ |
bf8fe701 | 451 | debugs(84, 1, "helperStatefulReset: RESET During request " << hlp->id_name << " "); |
62e76326 | 452 | srv->flags.busy = 0; |
07eca7e0 | 453 | srv->roffset = 0; |
62e76326 | 454 | helperStatefulRequestFree(r); |
455 | srv->request = NULL; | |
94439e4e | 456 | } |
62e76326 | 457 | |
94439e4e | 458 | srv->flags.busy = 0; |
62e76326 | 459 | |
4f0ef8e8 | 460 | if (srv->queue.head) { |
62e76326 | 461 | srv->flags.reserved = S_HELPER_DEFERRED; |
462 | helperStatefulServerKickQueue(srv); | |
4f0ef8e8 | 463 | } else { |
62e76326 | 464 | srv->flags.reserved = S_HELPER_FREE; |
465 | ||
466 | if ((srv->parent->OnEmptyQueue != NULL) && (srv->data)) | |
467 | srv->parent->OnEmptyQueue(srv->data); | |
468 | ||
469 | helperStatefulKickQueue(hlp); | |
94439e4e | 470 | } |
471 | } | |
472 | ||
4f0ef8e8 | 473 | /* |
474 | * DPW 2007-05-08 | |
475 | * | |
476 | * helperStatefulReleaseServer tells the helper that whoever was | |
477 | * using it no longer needs its services. | |
478 | * | |
479 | * If the state is S_HELPER_DEFERRED, decrease the deferred count. | |
480 | * If the count goes to zero, then it can become S_HELPER_FREE. | |
481 | * | |
482 | * If the state is S_HELPER_RESERVED, then it should always | |
483 | * become S_HELPER_FREE. | |
484 | */ | |
94439e4e | 485 | void |
486 | helperStatefulReleaseServer(helper_stateful_server * srv) | |
94439e4e | 487 | { |
4f0ef8e8 | 488 | debugs(84, 3, HERE << "srv-" << srv->index << " flags.reserved = " << srv->flags.reserved); |
489 | if (srv->flags.reserved = S_HELPER_FREE) | |
490 | return; | |
491 | ||
60d096f4 | 492 | srv->stats.releases++; |
62e76326 | 493 | |
4f0ef8e8 | 494 | if (srv->flags.reserved == S_HELPER_DEFERRED) { |
62e76326 | 495 | assert(srv->deferred_requests); |
496 | srv->deferred_requests--; | |
4f0ef8e8 | 497 | if (srv->deferred_requests) { |
498 | debugs(0,0,HERE << "helperStatefulReleaseServer srv->deferred_requests=" << srv->deferred_requests); | |
499 | return; | |
500 | } | |
501 | if (srv->queue.head) { | |
502 | debugs(0,0,HERE << "helperStatefulReleaseServer srv->queue.head not NULL"); | |
503 | return; | |
504 | } | |
60d096f4 | 505 | } |
62e76326 | 506 | |
4f0ef8e8 | 507 | srv->flags.reserved = S_HELPER_FREE; |
508 | if (srv->parent->OnEmptyQueue != NULL && srv->data) | |
509 | srv->parent->OnEmptyQueue(srv->data); | |
94439e4e | 510 | } |
511 | ||
512 | void * | |
513 | helperStatefulServerGetData(helper_stateful_server * srv) | |
514 | /* return a pointer to the stateful routines data area */ | |
515 | { | |
516 | return srv->data; | |
74addf6c | 517 | } |
518 | ||
519 | void | |
9522b380 | 520 | helperStats(StoreEntry * sentry, helper * hlp, const char *label) |
74addf6c | 521 | { |
9522b380 | 522 | if (!helperStartStats(sentry, hlp, label)) |
523 | return; | |
524 | ||
0a706c69 | 525 | storeAppendPrintf(sentry, "program: %s\n", |
62e76326 | 526 | hlp->cmdline->key); |
74addf6c | 527 | storeAppendPrintf(sentry, "number running: %d of %d\n", |
62e76326 | 528 | hlp->n_running, hlp->n_to_start); |
74addf6c | 529 | storeAppendPrintf(sentry, "requests sent: %d\n", |
62e76326 | 530 | hlp->stats.requests); |
74addf6c | 531 | storeAppendPrintf(sentry, "replies received: %d\n", |
62e76326 | 532 | hlp->stats.replies); |
74addf6c | 533 | storeAppendPrintf(sentry, "queue length: %d\n", |
62e76326 | 534 | hlp->stats.queue_size); |
f9598528 | 535 | storeAppendPrintf(sentry, "avg service time: %d msec\n", |
536 | hlp->stats.avg_svc_time); | |
74addf6c | 537 | storeAppendPrintf(sentry, "\n"); |
09c1ece1 | 538 | storeAppendPrintf(sentry, "%7s\t%7s\t%7s\t%11s\t%s\t%7s\t%7s\t%7s\n", |
62e76326 | 539 | "#", |
540 | "FD", | |
541 | "PID", | |
542 | "# Requests", | |
543 | "Flags", | |
544 | "Time", | |
545 | "Offset", | |
546 | "Request"); | |
547 | ||
4f0ef8e8 | 548 | for (dlink_node *link = hlp->servers.head; link; link = link->next) { |
07eca7e0 | 549 | helper_server *srv = (helper_server*)link->data; |
f9598528 | 550 | double tt = 0.001 * (srv->requests[0] ? tvSubMsec(srv->requests[0]->dispatch_time, current_time) : tvSubMsec(srv->dispatch_time, srv->answer_time)); |
d8f10d6a | 551 | storeAppendPrintf(sentry, "%7d\t%7d\t%7d\t%11d\t%c%c%c%c\t%7.3f\t%7d\t%s\n", |
62e76326 | 552 | srv->index + 1, |
553 | srv->rfd, | |
554 | srv->pid, | |
555 | srv->stats.uses, | |
07eca7e0 | 556 | srv->stats.pending ? 'B' : ' ', |
557 | srv->flags.writing ? 'W' : ' ', | |
62e76326 | 558 | srv->flags.closing ? 'C' : ' ', |
559 | srv->flags.shutdown ? 'S' : ' ', | |
560 | tt < 0.0 ? 0.0 : tt, | |
07eca7e0 | 561 | (int) srv->roffset, |
562 | srv->requests[0] ? log_quote(srv->requests[0]->buf) : "(none)"); | |
74addf6c | 563 | } |
62e76326 | 564 | |
74addf6c | 565 | storeAppendPrintf(sentry, "\nFlags key:\n\n"); |
74addf6c | 566 | storeAppendPrintf(sentry, " B = BUSY\n"); |
f9598528 | 567 | storeAppendPrintf(sentry, " W = WRITING\n"); |
74addf6c | 568 | storeAppendPrintf(sentry, " C = CLOSING\n"); |
569 | storeAppendPrintf(sentry, " S = SHUTDOWN\n"); | |
570 | } | |
571 | ||
94439e4e | 572 | void |
9522b380 | 573 | helperStatefulStats(StoreEntry * sentry, statefulhelper * hlp, const char *label) |
94439e4e | 574 | { |
9522b380 | 575 | if (!helperStartStats(sentry, hlp, label)) |
576 | return; | |
577 | ||
cf154edc | 578 | storeAppendPrintf(sentry, "program: %s\n", |
579 | hlp->cmdline->key); | |
94439e4e | 580 | storeAppendPrintf(sentry, "number running: %d of %d\n", |
62e76326 | 581 | hlp->n_running, hlp->n_to_start); |
94439e4e | 582 | storeAppendPrintf(sentry, "requests sent: %d\n", |
62e76326 | 583 | hlp->stats.requests); |
94439e4e | 584 | storeAppendPrintf(sentry, "replies received: %d\n", |
62e76326 | 585 | hlp->stats.replies); |
94439e4e | 586 | storeAppendPrintf(sentry, "queue length: %d\n", |
62e76326 | 587 | hlp->stats.queue_size); |
94439e4e | 588 | storeAppendPrintf(sentry, "avg service time: %d msec\n", |
62e76326 | 589 | hlp->stats.avg_svc_time); |
94439e4e | 590 | storeAppendPrintf(sentry, "\n"); |
0a706c69 | 591 | storeAppendPrintf(sentry, "%7s\t%7s\t%7s\t%11s\t%20s\t%s\t%7s\t%7s\t%7s\n", |
62e76326 | 592 | "#", |
593 | "FD", | |
594 | "PID", | |
595 | "# Requests", | |
596 | "# Deferred Requests", | |
597 | "Flags", | |
598 | "Time", | |
599 | "Offset", | |
600 | "Request"); | |
601 | ||
4f0ef8e8 | 602 | for (dlink_node *link = hlp->servers.head; link; link = link->next) { |
603 | helper_stateful_server *srv = (helper_stateful_server *)link->data; | |
604 | double tt = 0.001 * tvSubMsec(srv->dispatch_time, | |
f9598528 | 605 | srv->flags.busy ? current_time : srv->answer_time); |
b902a58c | 606 | storeAppendPrintf(sentry, "%7d\t%7d\t%7d\t%11d\t%20d\t%c%c%c%c%c\t%7.3f\t%7d\t%s\n", |
62e76326 | 607 | srv->index + 1, |
608 | srv->rfd, | |
609 | srv->pid, | |
610 | srv->stats.uses, | |
611 | (int) srv->deferred_requests, | |
62e76326 | 612 | srv->flags.busy ? 'B' : ' ', |
613 | srv->flags.closing ? 'C' : ' ', | |
4f0ef8e8 | 614 | srv->flags.reserved == S_HELPER_RESERVED ? 'R' : (srv->flags.reserved == S_HELPER_DEFERRED ? 'D' : ' '), |
62e76326 | 615 | srv->flags.shutdown ? 'S' : ' ', |
616 | srv->request ? (srv->request->placeholder ? 'P' : ' ') : ' ', | |
617 | tt < 0.0 ? 0.0 : tt, | |
07eca7e0 | 618 | (int) srv->roffset, |
62e76326 | 619 | srv->request ? log_quote(srv->request->buf) : "(none)"); |
94439e4e | 620 | } |
62e76326 | 621 | |
94439e4e | 622 | storeAppendPrintf(sentry, "\nFlags key:\n\n"); |
94439e4e | 623 | storeAppendPrintf(sentry, " B = BUSY\n"); |
624 | storeAppendPrintf(sentry, " C = CLOSING\n"); | |
625 | storeAppendPrintf(sentry, " R = RESERVED or DEFERRED\n"); | |
626 | storeAppendPrintf(sentry, " S = SHUTDOWN\n"); | |
5d146f7d | 627 | storeAppendPrintf(sentry, " P = PLACEHOLDER\n"); |
94439e4e | 628 | } |
629 | ||
74addf6c | 630 | void |
631 | helperShutdown(helper * hlp) | |
632 | { | |
c68e9c6b | 633 | dlink_node *link = hlp->servers.head; |
2d5d5261 | 634 | #ifdef _SQUID_MSWIN_ |
635 | ||
636 | HANDLE hIpc; | |
637 | pid_t pid; | |
638 | int no; | |
639 | #endif | |
62e76326 | 640 | |
c68e9c6b | 641 | while (link) { |
62e76326 | 642 | helper_server *srv; |
643 | srv = (helper_server *)link->data; | |
644 | link = link->next; | |
645 | ||
8cfc76db | 646 | if (srv->flags.shutdown) { |
bf8fe701 | 647 | debugs(84, 3, "helperShutdown: " << hlp->id_name << " #" << srv->index + 1 << " has already SHUT DOWN."); |
62e76326 | 648 | continue; |
649 | } | |
650 | ||
d8f10d6a | 651 | hlp->n_active--; |
652 | assert(hlp->n_active >= 0); | |
653 | ||
62e76326 | 654 | srv->flags.shutdown = 1; /* request it to shut itself down */ |
655 | ||
d8f10d6a | 656 | if (srv->flags.closing) { |
bf8fe701 | 657 | debugs(84, 3, "helperShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is CLOSING."); |
62e76326 | 658 | continue; |
659 | } | |
660 | ||
d8f10d6a | 661 | if (srv->stats.pending) { |
bf8fe701 | 662 | debugs(84, 3, "helperShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is BUSY."); |
62e76326 | 663 | continue; |
664 | } | |
665 | ||
666 | srv->flags.closing = 1; | |
2d5d5261 | 667 | #ifdef _SQUID_MSWIN_ |
668 | ||
669 | hIpc = srv->hIpc; | |
670 | pid = srv->pid; | |
671 | no = srv->index + 1; | |
672 | shutdown(srv->wfd, SD_BOTH); | |
673 | #endif | |
674 | ||
bf8fe701 | 675 | debugs(84, 3, "helperShutdown: " << hlp->id_name << " #" << srv->index + 1 << " shutting down."); |
62e76326 | 676 | /* the rest of the details is dealt with in the helperServerFree |
677 | * close handler | |
678 | */ | |
679 | comm_close(srv->rfd); | |
2d5d5261 | 680 | #ifdef _SQUID_MSWIN_ |
681 | ||
682 | if (hIpc) { | |
683 | if (WaitForSingleObject(hIpc, 5000) != WAIT_OBJECT_0) { | |
684 | getCurrentTime(); | |
bf8fe701 | 685 | debugs(84, 1, "helperShutdown: WARNING: " << hlp->id_name << |
686 | " #" << no << " (" << hlp->cmdline->key << "," << | |
687 | (long int)pid << ") didn't exit in 5 seconds"); | |
688 | ||
2d5d5261 | 689 | } |
690 | ||
691 | CloseHandle(hIpc); | |
692 | } | |
693 | ||
694 | #endif | |
695 | ||
74addf6c | 696 | } |
697 | } | |
698 | ||
94439e4e | 699 | void |
700 | helperStatefulShutdown(statefulhelper * hlp) | |
701 | { | |
702 | dlink_node *link = hlp->servers.head; | |
703 | helper_stateful_server *srv; | |
2d5d5261 | 704 | #ifdef _SQUID_MSWIN_ |
705 | ||
706 | HANDLE hIpc; | |
707 | pid_t pid; | |
708 | int no; | |
709 | #endif | |
62e76326 | 710 | |
94439e4e | 711 | while (link) { |
62e76326 | 712 | srv = (helper_stateful_server *)link->data; |
713 | link = link->next; | |
714 | ||
8cfc76db | 715 | if (srv->flags.shutdown) { |
bf8fe701 | 716 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " has already SHUT DOWN."); |
62e76326 | 717 | continue; |
718 | } | |
719 | ||
d8f10d6a | 720 | hlp->n_active--; |
721 | assert(hlp->n_active >= 0); | |
62e76326 | 722 | srv->flags.shutdown = 1; /* request it to shut itself down */ |
723 | ||
724 | if (srv->flags.busy) { | |
bf8fe701 | 725 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is BUSY."); |
62e76326 | 726 | continue; |
727 | } | |
728 | ||
729 | if (srv->flags.closing) { | |
bf8fe701 | 730 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is CLOSING."); |
62e76326 | 731 | continue; |
732 | } | |
733 | ||
734 | if (srv->flags.reserved != S_HELPER_FREE) { | |
bf8fe701 | 735 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is RESERVED."); |
62e76326 | 736 | continue; |
737 | } | |
738 | ||
739 | if (srv->deferred_requests) { | |
bf8fe701 | 740 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " has DEFERRED requests."); |
62e76326 | 741 | continue; |
742 | } | |
743 | ||
744 | srv->flags.closing = 1; | |
2d5d5261 | 745 | #ifdef _SQUID_MSWIN_ |
746 | ||
747 | hIpc = srv->hIpc; | |
748 | pid = srv->pid; | |
749 | no = srv->index + 1; | |
750 | shutdown(srv->wfd, SD_BOTH); | |
751 | #endif | |
752 | ||
bf8fe701 | 753 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " shutting down."); |
754 | ||
62e76326 | 755 | /* the rest of the details is dealt with in the helperStatefulServerFree |
756 | * close handler | |
757 | */ | |
758 | comm_close(srv->rfd); | |
2d5d5261 | 759 | #ifdef _SQUID_MSWIN_ |
760 | ||
761 | if (hIpc) { | |
762 | if (WaitForSingleObject(hIpc, 5000) != WAIT_OBJECT_0) { | |
763 | getCurrentTime(); | |
bf8fe701 | 764 | debugs(84, 1, "helperShutdown: WARNING: " << hlp->id_name << |
765 | " #" << no << " (" << hlp->cmdline->key << "," << | |
766 | (long int)pid << ") didn't exit in 5 seconds"); | |
2d5d5261 | 767 | } |
768 | ||
769 | CloseHandle(hIpc); | |
770 | } | |
771 | ||
772 | #endif | |
773 | ||
94439e4e | 774 | } |
775 | } | |
776 | ||
777 | ||
1f5f60dd | 778 | helper * |
779 | helperCreate(const char *name) | |
780 | { | |
28c60158 | 781 | helper *hlp; |
aa839030 | 782 | CBDATA_INIT_TYPE(helper); |
72711e31 | 783 | hlp = cbdataAlloc(helper); |
1f5f60dd | 784 | hlp->id_name = name; |
785 | return hlp; | |
786 | } | |
787 | ||
94439e4e | 788 | statefulhelper * |
789 | helperStatefulCreate(const char *name) | |
790 | { | |
791 | statefulhelper *hlp; | |
aa839030 | 792 | CBDATA_INIT_TYPE(statefulhelper); |
72711e31 | 793 | hlp = cbdataAlloc(statefulhelper); |
94439e4e | 794 | hlp->id_name = name; |
795 | return hlp; | |
796 | } | |
797 | ||
798 | ||
1f5f60dd | 799 | void |
800 | helperFree(helper * hlp) | |
801 | { | |
5dae8514 | 802 | if (!hlp) |
62e76326 | 803 | return; |
804 | ||
1f5f60dd | 805 | /* note, don't free hlp->name, it probably points to static memory */ |
fe73896c | 806 | if (hlp->queue.head) |
bf8fe701 | 807 | debugs(84, 0, "WARNING: freeing " << hlp->id_name << " helper with " << |
808 | hlp->stats.queue_size << " requests queued"); | |
62e76326 | 809 | |
1f5f60dd | 810 | cbdataFree(hlp); |
811 | } | |
812 | ||
94439e4e | 813 | void |
814 | helperStatefulFree(statefulhelper * hlp) | |
815 | { | |
5dae8514 | 816 | if (!hlp) |
62e76326 | 817 | return; |
818 | ||
94439e4e | 819 | /* note, don't free hlp->name, it probably points to static memory */ |
820 | if (hlp->queue.head) | |
bf8fe701 | 821 | debugs(84, 0, "WARNING: freeing " << hlp->id_name << " helper with " << |
822 | hlp->stats.queue_size << " requests queued"); | |
62e76326 | 823 | |
94439e4e | 824 | cbdataFree(hlp); |
825 | } | |
826 | ||
827 | ||
74addf6c | 828 | /* ====================================================================== */ |
829 | /* LOCAL FUNCTIONS */ | |
830 | /* ====================================================================== */ | |
831 | ||
832 | static void | |
1f5f60dd | 833 | helperServerFree(int fd, void *data) |
74addf6c | 834 | { |
e6ccf245 | 835 | helper_server *srv = (helper_server *)data; |
74addf6c | 836 | helper *hlp = srv->parent; |
ac750329 | 837 | helper_request *r; |
07eca7e0 | 838 | int i, concurrency = hlp->concurrency; |
839 | ||
840 | if (!concurrency) | |
841 | concurrency = 1; | |
842 | ||
74addf6c | 843 | assert(srv->rfd == fd); |
62e76326 | 844 | |
07eca7e0 | 845 | if (srv->rbuf) { |
846 | memFreeBuf(srv->rbuf_sz, srv->rbuf); | |
847 | srv->rbuf = NULL; | |
74addf6c | 848 | } |
62e76326 | 849 | |
2fe7eff9 | 850 | srv->wqueue->clean(); |
032785bf | 851 | delete srv->wqueue; |
852 | ||
853 | if (srv->writebuf) { | |
2fe7eff9 | 854 | srv->writebuf->clean(); |
032785bf | 855 | delete srv->writebuf; |
856 | srv->writebuf = NULL; | |
857 | } | |
62e76326 | 858 | |
07eca7e0 | 859 | for (i = 0; i < concurrency; i++) { |
860 | if ((r = srv->requests[i])) { | |
861 | void *cbdata; | |
62e76326 | 862 | |
07eca7e0 | 863 | if (cbdataReferenceValidDone(r->data, &cbdata)) |
864 | r->callback(cbdata, NULL); | |
62e76326 | 865 | |
07eca7e0 | 866 | helperRequestFree(r); |
867 | ||
868 | srv->requests[i] = NULL; | |
869 | } | |
ac750329 | 870 | } |
62e76326 | 871 | |
07eca7e0 | 872 | safe_free(srv->requests); |
873 | ||
3cdb7cd0 | 874 | if (srv->wfd != srv->rfd && srv->wfd != -1) |
62e76326 | 875 | comm_close(srv->wfd); |
876 | ||
74addf6c | 877 | dlinkDelete(&srv->link, &hlp->servers); |
62e76326 | 878 | |
74addf6c | 879 | hlp->n_running--; |
62e76326 | 880 | |
74addf6c | 881 | assert(hlp->n_running >= 0); |
62e76326 | 882 | |
1f5f60dd | 883 | if (!srv->flags.shutdown) { |
d8f10d6a | 884 | hlp->n_active--; |
885 | assert(hlp->n_active >= 0); | |
bf8fe701 | 886 | debugs(84, 0, "WARNING: " << hlp->id_name << " #" << srv->index + 1 << |
887 | " (FD " << fd << ") exited"); | |
62e76326 | 888 | |
5ea33fce | 889 | if (hlp->n_active < hlp->n_to_start / 2) { |
bf8fe701 | 890 | debugs(80, 0, "Too few " << hlp->id_name << " processes are running"); |
5ea33fce | 891 | |
892 | if (hlp->last_restart > squid_curtime - 30) | |
893 | fatalf("The %s helpers are crashing too rapidly, need help!\n", hlp->id_name); | |
894 | ||
bf8fe701 | 895 | debugs(80, 0, "Starting new helpers"); |
5ea33fce | 896 | |
897 | helperOpenServers(hlp); | |
898 | } | |
14e87a44 | 899 | } |
62e76326 | 900 | |
fa80a8ef | 901 | cbdataReferenceDone(srv->parent); |
14e87a44 | 902 | cbdataFree(srv); |
74addf6c | 903 | } |
904 | ||
94439e4e | 905 | static void |
906 | helperStatefulServerFree(int fd, void *data) | |
907 | { | |
e6ccf245 | 908 | helper_stateful_server *srv = (helper_stateful_server *)data; |
94439e4e | 909 | statefulhelper *hlp = srv->parent; |
910 | helper_stateful_request *r; | |
911 | assert(srv->rfd == fd); | |
62e76326 | 912 | |
07eca7e0 | 913 | if (srv->rbuf) { |
914 | memFreeBuf(srv->rbuf_sz, srv->rbuf); | |
915 | srv->rbuf = NULL; | |
94439e4e | 916 | } |
62e76326 | 917 | |
07eca7e0 | 918 | #if 0 |
2fe7eff9 | 919 | srv->wqueue->clean(); |
032785bf | 920 | |
921 | delete srv->wqueue; | |
07eca7e0 | 922 | |
923 | #endif | |
924 | ||
94439e4e | 925 | if ((r = srv->request)) { |
62e76326 | 926 | void *cbdata; |
927 | ||
928 | if (cbdataReferenceValidDone(r->data, &cbdata)) | |
07eca7e0 | 929 | r->callback(cbdata, srv, NULL); |
62e76326 | 930 | |
931 | helperStatefulRequestFree(r); | |
932 | ||
933 | srv->request = NULL; | |
94439e4e | 934 | } |
62e76326 | 935 | |
3c641669 | 936 | /* TODO: walk the local queue of requests and carry them all out */ |
94439e4e | 937 | if (srv->wfd != srv->rfd && srv->wfd != -1) |
62e76326 | 938 | comm_close(srv->wfd); |
939 | ||
94439e4e | 940 | dlinkDelete(&srv->link, &hlp->servers); |
62e76326 | 941 | |
94439e4e | 942 | hlp->n_running--; |
62e76326 | 943 | |
94439e4e | 944 | assert(hlp->n_running >= 0); |
62e76326 | 945 | |
94439e4e | 946 | if (!srv->flags.shutdown) { |
d8f10d6a | 947 | hlp->n_active--; |
948 | assert( hlp->n_active >= 0); | |
bf8fe701 | 949 | debugs(84, 0, "WARNING: " << hlp->id_name << " #" << srv->index + 1 << " (FD " << fd << ") exited"); |
62e76326 | 950 | |
5ea33fce | 951 | if (hlp->n_active <= hlp->n_to_start / 2) { |
bf8fe701 | 952 | debugs(80, 0, "Too few " << hlp->id_name << " processes are running"); |
5ea33fce | 953 | |
954 | if (hlp->last_restart > squid_curtime - 30) | |
955 | fatalf("The %s helpers are crashing too rapidly, need help!\n", hlp->id_name); | |
956 | ||
bf8fe701 | 957 | debugs(80, 0, "Starting new helpers"); |
5ea33fce | 958 | |
959 | helperStatefulOpenServers(hlp); | |
960 | } | |
94439e4e | 961 | } |
62e76326 | 962 | |
94439e4e | 963 | if (srv->data != NULL) |
b001e822 | 964 | hlp->datapool->free(srv->data); |
62e76326 | 965 | |
fa80a8ef | 966 | cbdataReferenceDone(srv->parent); |
62e76326 | 967 | |
94439e4e | 968 | cbdataFree(srv); |
969 | } | |
970 | ||
971 | ||
74addf6c | 972 | static void |
c4b7a5a9 | 973 | helperHandleRead(int fd, char *buf, size_t len, comm_err_t flag, int xerrno, void *data) |
74addf6c | 974 | { |
74addf6c | 975 | char *t = NULL; |
e6ccf245 | 976 | helper_server *srv = (helper_server *)data; |
74addf6c | 977 | helper *hlp = srv->parent; |
978 | assert(fd == srv->rfd); | |
fa80a8ef | 979 | assert(cbdataReferenceValid(data)); |
c4b7a5a9 | 980 | |
981 | /* Bail out early on COMM_ERR_CLOSING - close handlers will tidy up for us */ | |
62e76326 | 982 | |
c4b7a5a9 | 983 | if (flag == COMM_ERR_CLOSING) { |
984 | return; | |
985 | } | |
986 | ||
4f0ef8e8 | 987 | debugs(84, 5, "helperHandleRead: " << len << " bytes from " << hlp->id_name << " #" << srv->index + 1); |
62e76326 | 988 | |
c4b7a5a9 | 989 | if (flag != COMM_OK || len <= 0) { |
62e76326 | 990 | if (len < 0) |
bf8fe701 | 991 | debugs(84, 1, "helperHandleRead: FD " << fd << " read: " << xstrerror()); |
62e76326 | 992 | |
993 | comm_close(fd); | |
994 | ||
995 | return; | |
74addf6c | 996 | } |
62e76326 | 997 | |
07eca7e0 | 998 | srv->roffset += len; |
999 | srv->rbuf[srv->roffset] = '\0'; | |
bf8fe701 | 1000 | debugs(84, 9, "helperHandleRead: '" << srv->rbuf << "'"); |
62e76326 | 1001 | |
07eca7e0 | 1002 | if (!srv->stats.pending) { |
62e76326 | 1003 | /* someone spoke without being spoken to */ |
bf8fe701 | 1004 | debugs(84, 1, "helperHandleRead: unexpected read from " << |
1005 | hlp->id_name << " #" << srv->index + 1 << ", " << (int)len << | |
1006 | " bytes '" << srv->rbuf << "'"); | |
1007 | ||
07eca7e0 | 1008 | srv->roffset = 0; |
1009 | srv->rbuf[0] = '\0'; | |
1010 | } | |
1011 | ||
1012 | while ((t = strchr(srv->rbuf, '\n'))) { | |
62e76326 | 1013 | /* end of reply found */ |
07eca7e0 | 1014 | helper_request *r; |
1015 | char *msg = srv->rbuf; | |
1016 | int i = 0; | |
bf8fe701 | 1017 | debugs(84, 3, "helperHandleRead: end of reply found"); |
6bf4f823 | 1018 | |
1019 | if (t > srv->rbuf && t[-1] == '\r') | |
1020 | t[-1] = '\0'; | |
1021 | ||
07eca7e0 | 1022 | *t++ = '\0'; |
62e76326 | 1023 | |
07eca7e0 | 1024 | if (hlp->concurrency) { |
1025 | i = strtol(msg, &msg, 10); | |
62e76326 | 1026 | |
e4755e29 | 1027 | while (*msg && xisspace(*msg)) |
07eca7e0 | 1028 | msg++; |
1029 | } | |
62e76326 | 1030 | |
07eca7e0 | 1031 | r = srv->requests[i]; |
62e76326 | 1032 | |
07eca7e0 | 1033 | if (r) { |
1034 | HLPCB *callback = r->callback; | |
1035 | void *cbdata; | |
62e76326 | 1036 | |
07eca7e0 | 1037 | srv->requests[i] = NULL; |
62e76326 | 1038 | |
07eca7e0 | 1039 | r->callback = NULL; |
62e76326 | 1040 | |
07eca7e0 | 1041 | if (cbdataReferenceValidDone(r->data, &cbdata)) |
1042 | callback(cbdata, msg); | |
62e76326 | 1043 | |
07eca7e0 | 1044 | srv->stats.pending--; |
1045 | ||
1046 | hlp->stats.replies++; | |
1047 | ||
f9598528 | 1048 | srv->answer_time = current_time; |
1049 | ||
1050 | srv->dispatch_time = r->dispatch_time; | |
1051 | ||
07eca7e0 | 1052 | hlp->stats.avg_svc_time = |
1053 | intAverage(hlp->stats.avg_svc_time, | |
1054 | tvSubMsec(r->dispatch_time, current_time), | |
1055 | hlp->stats.replies, REDIRECT_AV_FACTOR); | |
1056 | ||
1057 | helperRequestFree(r); | |
1058 | } else { | |
bf8fe701 | 1059 | debugs(84, 1, "helperHandleRead: unexpected reply on channel " << |
1060 | i << " from " << hlp->id_name << " #" << srv->index + 1 << | |
1061 | " '" << srv->rbuf << "'"); | |
1062 | ||
07eca7e0 | 1063 | } |
1064 | ||
1065 | srv->roffset -= (t - srv->rbuf); | |
1066 | memmove(srv->rbuf, t, srv->roffset + 1); | |
62e76326 | 1067 | |
1068 | if (srv->flags.shutdown) { | |
1069 | int wfd = srv->wfd; | |
1070 | srv->wfd = -1; | |
d8f10d6a | 1071 | srv->flags.closing=1; |
62e76326 | 1072 | comm_close(wfd); |
1073 | } else | |
1074 | helperKickQueue(hlp); | |
74addf6c | 1075 | } |
07eca7e0 | 1076 | |
1077 | comm_read(fd, srv->rbuf + srv->roffset, srv->rbuf_sz - srv->roffset - 1, helperHandleRead, srv); | |
74addf6c | 1078 | } |
1079 | ||
94439e4e | 1080 | static void |
c4b7a5a9 | 1081 | helperStatefulHandleRead(int fd, char *buf, size_t len, comm_err_t flag, int xerrno, void *data) |
94439e4e | 1082 | { |
94439e4e | 1083 | char *t = NULL; |
e6ccf245 | 1084 | helper_stateful_server *srv = (helper_stateful_server *)data; |
94439e4e | 1085 | helper_stateful_request *r; |
1086 | statefulhelper *hlp = srv->parent; | |
1087 | assert(fd == srv->rfd); | |
fa80a8ef | 1088 | assert(cbdataReferenceValid(data)); |
c4b7a5a9 | 1089 | |
1090 | /* Bail out early on COMM_ERR_CLOSING - close handlers will tidy up for us */ | |
62e76326 | 1091 | |
c4b7a5a9 | 1092 | if (flag == COMM_ERR_CLOSING) { |
1093 | return; | |
1094 | } | |
1095 | ||
4a7a3d56 | 1096 | debugs(84, 5, "helperStatefulHandleRead: " << len << " bytes from " << |
4f0ef8e8 | 1097 | hlp->id_name << " #" << srv->index + 1); |
bf8fe701 | 1098 | |
62e76326 | 1099 | |
c4b7a5a9 | 1100 | if (flag != COMM_OK || len <= 0) { |
62e76326 | 1101 | if (len < 0) |
bf8fe701 | 1102 | debugs(84, 1, "helperStatefulHandleRead: FD " << fd << " read: " << xstrerror()); |
62e76326 | 1103 | |
1104 | comm_close(fd); | |
1105 | ||
1106 | return; | |
94439e4e | 1107 | } |
62e76326 | 1108 | |
07eca7e0 | 1109 | srv->roffset += len; |
1110 | srv->rbuf[srv->roffset] = '\0'; | |
94439e4e | 1111 | r = srv->request; |
62e76326 | 1112 | |
94439e4e | 1113 | if (r == NULL) { |
62e76326 | 1114 | /* someone spoke without being spoken to */ |
bf8fe701 | 1115 | debugs(84, 1, "helperStatefulHandleRead: unexpected read from " << |
1116 | hlp->id_name << " #" << srv->index + 1 << ", " << (int)len << | |
1117 | " bytes '" << srv->rbuf << "'"); | |
1118 | ||
07eca7e0 | 1119 | srv->roffset = 0; |
1120 | } | |
1121 | ||
1122 | if ((t = strchr(srv->rbuf, '\n'))) { | |
62e76326 | 1123 | /* end of reply found */ |
bf8fe701 | 1124 | debugs(84, 3, "helperStatefulHandleRead: end of reply found"); |
6bf4f823 | 1125 | |
1126 | if (t > srv->rbuf && t[-1] == '\r') | |
1127 | t[-1] = '\0'; | |
1128 | ||
62e76326 | 1129 | *t = '\0'; |
1130 | ||
1131 | if (cbdataReferenceValid(r->data)) { | |
07eca7e0 | 1132 | switch ((r->callback(r->data, srv, srv->rbuf))) { /*if non-zero reserve helper */ |
62e76326 | 1133 | |
1134 | case S_HELPER_UNKNOWN: | |
1135 | fatal("helperStatefulHandleRead: either a non-state aware callback was give to the stateful helper routines, or an uninitialised callback response was recieved.\n"); | |
1136 | break; | |
1137 | ||
1138 | case S_HELPER_RELEASE: /* helper finished with */ | |
1139 | ||
1140 | if (!srv->deferred_requests && !srv->queue.head) { | |
1141 | srv->flags.reserved = S_HELPER_FREE; | |
1142 | ||
1143 | if ((srv->parent->OnEmptyQueue != NULL) && (srv->data)) | |
1144 | srv->parent->OnEmptyQueue(srv->data); | |
1145 | ||
bf8fe701 | 1146 | debugs(84, 5, "StatefulHandleRead: releasing " << hlp->id_name << " #" << srv->index + 1); |
62e76326 | 1147 | } else { |
1148 | srv->flags.reserved = S_HELPER_DEFERRED; | |
bf8fe701 | 1149 | debugs(84, 5, "StatefulHandleRead: outstanding deferred requests on " << |
1150 | hlp->id_name << " #" << srv->index + 1 << | |
1151 | ". reserving for deferred requests."); | |
62e76326 | 1152 | } |
1153 | ||
1154 | break; | |
1155 | ||
1156 | case S_HELPER_RESERVE: /* 'pin' this helper for the caller */ | |
1157 | ||
1158 | if (!srv->queue.head) { | |
1159 | assert(srv->deferred_requests == 0); | |
1160 | srv->flags.reserved = S_HELPER_RESERVED; | |
bf8fe701 | 1161 | debugs(84, 5, "StatefulHandleRead: reserving " << hlp->id_name << " #" << srv->index + 1); |
62e76326 | 1162 | } else { |
1163 | fatal("StatefulHandleRead: Callback routine attempted to reserve a stateful helper with deferred requests. This can lead to deadlock.\n"); | |
1164 | } | |
1165 | ||
1166 | break; | |
1167 | ||
1168 | case S_HELPER_DEFER: | |
1169 | /* the helper is still needed, but can | |
1170 | * be used for other requests in the meantime. | |
1171 | */ | |
1172 | srv->flags.reserved = S_HELPER_DEFERRED; | |
1173 | srv->deferred_requests++; | |
1174 | srv->stats.deferbycb++; | |
bf8fe701 | 1175 | debugs(84, 5, "StatefulHandleRead: reserving " << hlp->id_name << " #" << srv->index + 1 << " for deferred requests."); |
62e76326 | 1176 | break; |
1177 | ||
1178 | default: | |
1179 | fatal("helperStatefulHandleRead: unknown stateful helper callback result.\n"); | |
1180 | } | |
1181 | ||
1182 | } else { | |
bf8fe701 | 1183 | debugs(84, 1, "StatefulHandleRead: no callback data registered"); |
62e76326 | 1184 | } |
1185 | ||
1186 | srv->flags.busy = 0; | |
07eca7e0 | 1187 | srv->roffset = 0; |
62e76326 | 1188 | helperStatefulRequestFree(r); |
1189 | srv->request = NULL; | |
1190 | hlp->stats.replies++; | |
f9598528 | 1191 | srv->answer_time = current_time; |
62e76326 | 1192 | hlp->stats.avg_svc_time = |
1193 | intAverage(hlp->stats.avg_svc_time, | |
1194 | tvSubMsec(srv->dispatch_time, current_time), | |
1195 | hlp->stats.replies, REDIRECT_AV_FACTOR); | |
1196 | ||
1197 | if (srv->flags.shutdown | |
1198 | && srv->flags.reserved == S_HELPER_FREE | |
1199 | && !srv->deferred_requests) { | |
1200 | int wfd = srv->wfd; | |
1201 | srv->wfd = -1; | |
d8f10d6a | 1202 | srv->flags.closing=1; |
62e76326 | 1203 | comm_close(wfd); |
1204 | } else { | |
1205 | if (srv->queue.head) | |
1206 | helperStatefulServerKickQueue(srv); | |
1207 | else | |
1208 | helperStatefulKickQueue(hlp); | |
1209 | } | |
94439e4e | 1210 | } |
07eca7e0 | 1211 | |
1212 | comm_read(srv->rfd, srv->rbuf + srv->roffset, srv->rbuf_sz - srv->roffset - 1, | |
1213 | helperStatefulHandleRead, srv); | |
94439e4e | 1214 | } |
1215 | ||
74addf6c | 1216 | static void |
1217 | Enqueue(helper * hlp, helper_request * r) | |
1218 | { | |
e6ccf245 | 1219 | dlink_node *link = (dlink_node *)memAllocate(MEM_DLINK_NODE); |
74addf6c | 1220 | dlinkAddTail(r, link, &hlp->queue); |
1221 | hlp->stats.queue_size++; | |
62e76326 | 1222 | |
74addf6c | 1223 | if (hlp->stats.queue_size < hlp->n_running) |
62e76326 | 1224 | return; |
1225 | ||
74addf6c | 1226 | if (squid_curtime - hlp->last_queue_warn < 600) |
62e76326 | 1227 | return; |
1228 | ||
fe73896c | 1229 | if (shutting_down || reconfiguring) |
62e76326 | 1230 | return; |
1231 | ||
74addf6c | 1232 | hlp->last_queue_warn = squid_curtime; |
62e76326 | 1233 | |
bf8fe701 | 1234 | debugs(84, 0, "WARNING: All " << hlp->id_name << " processes are busy."); |
1235 | debugs(84, 0, "WARNING: " << hlp->stats.queue_size << " pending requests queued"); | |
62e76326 | 1236 | |
62e76326 | 1237 | |
74addf6c | 1238 | if (hlp->stats.queue_size > hlp->n_running * 2) |
62e76326 | 1239 | fatalf("Too many queued %s requests", hlp->id_name); |
1240 | ||
bf8fe701 | 1241 | debugs(84, 1, "Consider increasing the number of " << hlp->id_name << " processes in your config file."); |
1242 | ||
74addf6c | 1243 | } |
1244 | ||
94439e4e | 1245 | static void |
1246 | StatefulEnqueue(statefulhelper * hlp, helper_stateful_request * r) | |
1247 | { | |
e6ccf245 | 1248 | dlink_node *link = (dlink_node *)memAllocate(MEM_DLINK_NODE); |
94439e4e | 1249 | dlinkAddTail(r, link, &hlp->queue); |
1250 | hlp->stats.queue_size++; | |
62e76326 | 1251 | |
94439e4e | 1252 | if (hlp->stats.queue_size < hlp->n_running) |
62e76326 | 1253 | return; |
1254 | ||
893cbac6 | 1255 | if (hlp->stats.queue_size > hlp->n_running * 2) |
62e76326 | 1256 | fatalf("Too many queued %s requests", hlp->id_name); |
1257 | ||
94439e4e | 1258 | if (squid_curtime - hlp->last_queue_warn < 600) |
62e76326 | 1259 | return; |
1260 | ||
94439e4e | 1261 | if (shutting_down || reconfiguring) |
62e76326 | 1262 | return; |
1263 | ||
94439e4e | 1264 | hlp->last_queue_warn = squid_curtime; |
62e76326 | 1265 | |
bf8fe701 | 1266 | debugs(84, 0, "WARNING: All " << hlp->id_name << " processes are busy."); |
62e76326 | 1267 | |
bf8fe701 | 1268 | debugs(84, 0, "WARNING: " << hlp->stats.queue_size << " pending requests queued"); |
1269 | debugs(84, 1, "Consider increasing the number of " << hlp->id_name << " processes in your config file."); | |
62e76326 | 1270 | |
94439e4e | 1271 | } |
1272 | ||
1273 | static void | |
1274 | StatefulServerEnqueue(helper_stateful_server * srv, helper_stateful_request * r) | |
1275 | { | |
e6ccf245 | 1276 | dlink_node *link = (dlink_node *)memAllocate(MEM_DLINK_NODE); |
94439e4e | 1277 | dlinkAddTail(r, link, &srv->queue); |
62e76326 | 1278 | /* TODO: warning if the queue on this server is more than X |
1279 | * We don't check the queue size at the moment, because | |
1280 | * requests hitting here are deferrable | |
1281 | */ | |
1282 | /* hlp->stats.queue_size++; | |
1283 | * if (hlp->stats.queue_size < hlp->n_running) | |
1284 | * return; | |
1285 | * if (squid_curtime - hlp->last_queue_warn < 600) | |
1286 | * return; | |
1287 | * if (shutting_down || reconfiguring) | |
1288 | * return; | |
1289 | * hlp->last_queue_warn = squid_curtime; | |
bf8fe701 | 1290 | * debugs(84, 0, "WARNING: All " << hlp->id_name << " processes are busy."); |
1291 | * debugs(84, 0, "WARNING: " << hlp->stats.queue_size << " pending requests queued"); | |
62e76326 | 1292 | * if (hlp->stats.queue_size > hlp->n_running * 2) |
1293 | * fatalf("Too many queued %s requests", hlp->id_name); | |
bf8fe701 | 1294 | * debugs(84, 1, "Consider increasing the number of " << hlp->id_name << " processes in your config file." ); */ |
94439e4e | 1295 | } |
1296 | ||
1297 | ||
74addf6c | 1298 | static helper_request * |
1299 | Dequeue(helper * hlp) | |
1300 | { | |
1301 | dlink_node *link; | |
1302 | helper_request *r = NULL; | |
62e76326 | 1303 | |
74addf6c | 1304 | if ((link = hlp->queue.head)) { |
62e76326 | 1305 | r = (helper_request *)link->data; |
1306 | dlinkDelete(link, &hlp->queue); | |
1307 | memFree(link, MEM_DLINK_NODE); | |
1308 | hlp->stats.queue_size--; | |
74addf6c | 1309 | } |
62e76326 | 1310 | |
74addf6c | 1311 | return r; |
1312 | } | |
1313 | ||
94439e4e | 1314 | static helper_stateful_request * |
1315 | StatefulServerDequeue(helper_stateful_server * srv) | |
1316 | { | |
1317 | dlink_node *link; | |
1318 | helper_stateful_request *r = NULL; | |
62e76326 | 1319 | |
94439e4e | 1320 | if ((link = srv->queue.head)) { |
62e76326 | 1321 | r = (helper_stateful_request *)link->data; |
1322 | dlinkDelete(link, &srv->queue); | |
1323 | memFree(link, MEM_DLINK_NODE); | |
94439e4e | 1324 | } |
62e76326 | 1325 | |
94439e4e | 1326 | return r; |
1327 | } | |
1328 | ||
1329 | static helper_stateful_request * | |
1330 | StatefulDequeue(statefulhelper * hlp) | |
1331 | { | |
1332 | dlink_node *link; | |
1333 | helper_stateful_request *r = NULL; | |
62e76326 | 1334 | |
94439e4e | 1335 | if ((link = hlp->queue.head)) { |
62e76326 | 1336 | r = (helper_stateful_request *)link->data; |
1337 | dlinkDelete(link, &hlp->queue); | |
1338 | memFree(link, MEM_DLINK_NODE); | |
1339 | hlp->stats.queue_size--; | |
94439e4e | 1340 | } |
62e76326 | 1341 | |
94439e4e | 1342 | return r; |
1343 | } | |
1344 | ||
74addf6c | 1345 | static helper_server * |
1346 | GetFirstAvailable(helper * hlp) | |
1347 | { | |
1348 | dlink_node *n; | |
07eca7e0 | 1349 | helper_server *srv; |
1350 | helper_server *selected = NULL; | |
62e76326 | 1351 | |
fe73896c | 1352 | if (hlp->n_running == 0) |
62e76326 | 1353 | return NULL; |
1354 | ||
07eca7e0 | 1355 | /* Find "least" loaded helper (approx) */ |
74addf6c | 1356 | for (n = hlp->servers.head; n != NULL; n = n->next) { |
62e76326 | 1357 | srv = (helper_server *)n->data; |
1358 | ||
07eca7e0 | 1359 | if (selected && selected->stats.pending <= srv->stats.pending) |
62e76326 | 1360 | continue; |
1361 | ||
d8f10d6a | 1362 | if (srv->flags.shutdown) |
62e76326 | 1363 | continue; |
1364 | ||
07eca7e0 | 1365 | if (!srv->stats.pending) |
1366 | return srv; | |
1367 | ||
1368 | if (selected) { | |
1369 | selected = srv; | |
1370 | break; | |
1371 | } | |
1372 | ||
1373 | selected = srv; | |
74addf6c | 1374 | } |
62e76326 | 1375 | |
07eca7e0 | 1376 | /* Check for overload */ |
1377 | if (!selected) | |
1378 | return NULL; | |
1379 | ||
1380 | if (selected->stats.pending >= (hlp->concurrency ? hlp->concurrency : 1)) | |
1381 | return NULL; | |
1382 | ||
1383 | return selected; | |
74addf6c | 1384 | } |
1385 | ||
94439e4e | 1386 | static helper_stateful_server * |
1387 | StatefulGetFirstAvailable(statefulhelper * hlp) | |
1388 | { | |
1389 | dlink_node *n; | |
1390 | helper_stateful_server *srv = NULL; | |
4f0ef8e8 | 1391 | debugs(84, 5, "StatefulGetFirstAvailable: Running servers " << hlp->n_running); |
62e76326 | 1392 | |
94439e4e | 1393 | if (hlp->n_running == 0) |
62e76326 | 1394 | return NULL; |
1395 | ||
94439e4e | 1396 | for (n = hlp->servers.head; n != NULL; n = n->next) { |
62e76326 | 1397 | srv = (helper_stateful_server *)n->data; |
1398 | ||
1399 | if (srv->flags.busy) | |
1400 | continue; | |
1401 | ||
1402 | if (srv->flags.reserved == S_HELPER_RESERVED) | |
1403 | continue; | |
1404 | ||
d8f10d6a | 1405 | if (srv->flags.shutdown) |
62e76326 | 1406 | continue; |
1407 | ||
1408 | if ((hlp->IsAvailable != NULL) && (srv->data != NULL) && !(hlp->IsAvailable(srv->data))) | |
1409 | continue; | |
1410 | ||
4f0ef8e8 | 1411 | debugs(84, 5, "StatefulGetFirstAvailable: returning srv-" << srv->index); |
62e76326 | 1412 | return srv; |
94439e4e | 1413 | } |
62e76326 | 1414 | |
bf8fe701 | 1415 | debugs(84, 5, "StatefulGetFirstAvailable: None available."); |
94439e4e | 1416 | return NULL; |
1417 | } | |
1418 | ||
1419 | ||
42679bd6 | 1420 | static void |
1421 | helperDispatchWriteDone(int fd, char *buf, size_t len, comm_err_t flag, int xerrno, void *data) | |
1422 | { | |
07eca7e0 | 1423 | helper_server *srv = (helper_server *)data; |
1424 | ||
2fe7eff9 | 1425 | srv->writebuf->clean(); |
032785bf | 1426 | delete srv->writebuf; |
1427 | srv->writebuf = NULL; | |
07eca7e0 | 1428 | srv->flags.writing = 0; |
1429 | ||
1430 | if (flag != COMM_OK) { | |
1431 | /* Helper server has crashed */ | |
bf8fe701 | 1432 | debugs(84, 0, "helperDispatch: Helper " << srv->parent->id_name << " #" << srv->index + 1 << " has crashed"); |
07eca7e0 | 1433 | return; |
1434 | } | |
1435 | ||
2fe7eff9 | 1436 | if (!srv->wqueue->isNull()) { |
07eca7e0 | 1437 | srv->writebuf = srv->wqueue; |
032785bf | 1438 | srv->wqueue = new MemBuf; |
07eca7e0 | 1439 | srv->flags.writing = 1; |
1440 | comm_write(srv->wfd, | |
032785bf | 1441 | srv->writebuf->content(), |
1442 | srv->writebuf->contentSize(), | |
07eca7e0 | 1443 | helperDispatchWriteDone, /* Handler */ |
2b663917 | 1444 | srv, NULL); /* Handler-data, freefunc */ |
07eca7e0 | 1445 | } |
42679bd6 | 1446 | } |
1447 | ||
74addf6c | 1448 | static void |
1449 | helperDispatch(helper_server * srv, helper_request * r) | |
1450 | { | |
1451 | helper *hlp = srv->parent; | |
07eca7e0 | 1452 | helper_request **ptr = NULL; |
1453 | unsigned int slot; | |
62e76326 | 1454 | |
fa80a8ef | 1455 | if (!cbdataReferenceValid(r->data)) { |
bf8fe701 | 1456 | debugs(84, 1, "helperDispatch: invalid callback data"); |
62e76326 | 1457 | helperRequestFree(r); |
1458 | return; | |
74addf6c | 1459 | } |
62e76326 | 1460 | |
07eca7e0 | 1461 | for (slot = 0; slot < (hlp->concurrency ? hlp->concurrency : 1); slot++) { |
1462 | if (!srv->requests[slot]) { | |
1463 | ptr = &srv->requests[slot]; | |
1464 | break; | |
1465 | } | |
1466 | } | |
1467 | ||
1468 | assert(ptr); | |
1469 | *ptr = r; | |
1470 | srv->stats.pending += 1; | |
1471 | r->dispatch_time = current_time; | |
1472 | ||
2fe7eff9 | 1473 | if (srv->wqueue->isNull()) |
1474 | srv->wqueue->init(); | |
07eca7e0 | 1475 | |
1476 | if (hlp->concurrency) | |
2fe7eff9 | 1477 | srv->wqueue->Printf("%d %s", slot, r->buf); |
07eca7e0 | 1478 | else |
2fe7eff9 | 1479 | srv->wqueue->append(r->buf, strlen(r->buf)); |
07eca7e0 | 1480 | |
1481 | if (!srv->flags.writing) { | |
032785bf | 1482 | assert(NULL == srv->writebuf); |
07eca7e0 | 1483 | srv->writebuf = srv->wqueue; |
032785bf | 1484 | srv->wqueue = new MemBuf; |
07eca7e0 | 1485 | srv->flags.writing = 1; |
1486 | comm_write(srv->wfd, | |
032785bf | 1487 | srv->writebuf->content(), |
1488 | srv->writebuf->contentSize(), | |
07eca7e0 | 1489 | helperDispatchWriteDone, /* Handler */ |
2b663917 | 1490 | srv, NULL); /* Handler-data, free func */ |
07eca7e0 | 1491 | } |
1492 | ||
4a7a3d56 | 1493 | debugs(84, 5, "helperDispatch: Request sent to " << hlp->id_name << " #" << srv->index + 1 << ", " << strlen(r->buf) << " bytes"); |
bf8fe701 | 1494 | |
74addf6c | 1495 | srv->stats.uses++; |
1496 | hlp->stats.requests++; | |
1497 | } | |
1498 | ||
42679bd6 | 1499 | static void |
1500 | helperStatefulDispatchWriteDone(int fd, char *buf, size_t len, comm_err_t flag, | |
62e76326 | 1501 | int xerrno, void *data) |
42679bd6 | 1502 | { |
62e76326 | 1503 | /* nothing! */ |
42679bd6 | 1504 | } |
1505 | ||
1506 | ||
94439e4e | 1507 | static void |
1508 | helperStatefulDispatch(helper_stateful_server * srv, helper_stateful_request * r) | |
1509 | { | |
1510 | statefulhelper *hlp = srv->parent; | |
62e76326 | 1511 | |
fa80a8ef | 1512 | if (!cbdataReferenceValid(r->data)) { |
bf8fe701 | 1513 | debugs(84, 1, "helperStatefulDispatch: invalid callback data"); |
62e76326 | 1514 | helperStatefulRequestFree(r); |
1515 | return; | |
94439e4e | 1516 | } |
62e76326 | 1517 | |
bf8fe701 | 1518 | debugs(84, 9, "helperStatefulDispatch busying helper " << hlp->id_name << " #" << srv->index + 1); |
62e76326 | 1519 | |
94439e4e | 1520 | if (r->placeholder == 1) { |
62e76326 | 1521 | /* a callback is needed before this request can _use_ a helper. */ |
1522 | /* we don't care about releasing/deferring this helper. The request NEVER | |
1523 | * gets to the helper. So we throw away the return code */ | |
1524 | r->callback(r->data, srv, NULL); | |
1525 | /* throw away the placeholder */ | |
1526 | helperStatefulRequestFree(r); | |
1527 | /* and push the queue. Note that the callback may have submitted a new | |
1528 | * request to the helper which is why we test for the request*/ | |
1529 | ||
1530 | if (srv->request == NULL) { | |
1531 | if (srv->flags.shutdown | |
1532 | && srv->flags.reserved == S_HELPER_FREE | |
1533 | && !srv->deferred_requests) { | |
1534 | int wfd = srv->wfd; | |
1535 | srv->wfd = -1; | |
1536 | comm_close(wfd); | |
1537 | } else { | |
1538 | if (srv->queue.head) | |
1539 | helperStatefulServerKickQueue(srv); | |
1540 | else | |
1541 | helperStatefulKickQueue(hlp); | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | return; | |
94439e4e | 1546 | } |
62e76326 | 1547 | |
94439e4e | 1548 | srv->flags.busy = 1; |
1549 | srv->request = r; | |
1550 | srv->dispatch_time = current_time; | |
42679bd6 | 1551 | comm_write(srv->wfd, |
62e76326 | 1552 | r->buf, |
1553 | strlen(r->buf), | |
1554 | helperStatefulDispatchWriteDone, /* Handler */ | |
2b663917 | 1555 | hlp, NULL); /* Handler-data, free func */ |
bf8fe701 | 1556 | debugs(84, 5, "helperStatefulDispatch: Request sent to " << |
1557 | hlp->id_name << " #" << srv->index + 1 << ", " << | |
1558 | (int) strlen(r->buf) << " bytes"); | |
1559 | ||
94439e4e | 1560 | srv->stats.uses++; |
1561 | hlp->stats.requests++; | |
1562 | } | |
1563 | ||
1564 | ||
74addf6c | 1565 | static void |
1566 | helperKickQueue(helper * hlp) | |
1567 | { | |
1568 | helper_request *r; | |
1569 | helper_server *srv; | |
62e76326 | 1570 | |
74addf6c | 1571 | while ((srv = GetFirstAvailable(hlp)) && (r = Dequeue(hlp))) |
62e76326 | 1572 | helperDispatch(srv, r); |
74addf6c | 1573 | } |
1574 | ||
94439e4e | 1575 | static void |
1576 | helperStatefulKickQueue(statefulhelper * hlp) | |
1577 | { | |
1578 | helper_stateful_request *r; | |
1579 | helper_stateful_server *srv; | |
62e76326 | 1580 | |
94439e4e | 1581 | while ((srv = StatefulGetFirstAvailable(hlp)) && (r = StatefulDequeue(hlp))) |
62e76326 | 1582 | helperStatefulDispatch(srv, r); |
94439e4e | 1583 | } |
1584 | ||
1585 | static void | |
1586 | helperStatefulServerKickQueue(helper_stateful_server * srv) | |
1587 | { | |
1588 | helper_stateful_request *r; | |
62e76326 | 1589 | |
94439e4e | 1590 | if ((r = StatefulServerDequeue(srv))) |
62e76326 | 1591 | helperStatefulDispatch(srv, r); |
94439e4e | 1592 | } |
1593 | ||
74addf6c | 1594 | static void |
1595 | helperRequestFree(helper_request * r) | |
1596 | { | |
fa80a8ef | 1597 | cbdataReferenceDone(r->data); |
74addf6c | 1598 | xfree(r->buf); |
00d77d6b | 1599 | delete r; |
51ee7c82 | 1600 | } |
1601 | ||
94439e4e | 1602 | static void |
1603 | helperStatefulRequestFree(helper_stateful_request * r) | |
1604 | { | |
fa80a8ef | 1605 | cbdataReferenceDone(r->data); |
94439e4e | 1606 | xfree(r->buf); |
00d77d6b | 1607 | delete r; |
51ee7c82 | 1608 | } |
9522b380 | 1609 | |
1610 | // TODO: should helper_ and helper_stateful_ have a common parent? | |
1611 | static bool | |
1612 | helperStartStats(StoreEntry *sentry, void *hlp, const char *label) | |
1613 | { | |
1614 | if (!hlp) { | |
1615 | if (label) | |
1616 | storeAppendPrintf(sentry, "%s: unavailable\n", label); | |
1617 | return false; | |
1618 | } | |
1619 | ||
1620 | if (label) | |
1621 | storeAppendPrintf(sentry, "%s:\n", label); | |
1622 | ||
1623 | return true; | |
1624 | } |