]>
Commit | Line | Data |
---|---|---|
f740a279 | 1 | /* |
262a0e14 | 2 | * $Id$ |
f740a279 | 3 | * |
17bb3486 | 4 | * DEBUG: section 84 Helper process maintenance |
f740a279 | 5 | * AUTHOR: Harvest Derived? |
6 | * | |
2b6662ba | 7 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
f740a279 | 8 | * ---------------------------------------------------------- |
9 | * | |
2b6662ba | 10 | * Squid is the result of efforts by numerous individuals from |
11 | * the Internet community; see the CONTRIBUTORS file for full | |
12 | * details. Many organizations have provided support for Squid's | |
13 | * development; see the SPONSORS file for full details. Squid is | |
14 | * Copyrighted (C) 2001 by the Regents of the University of | |
15 | * California; see the COPYRIGHT file for full details. Squid | |
16 | * incorporates software developed and/or copyrighted by other | |
17 | * sources; see the CREDITS file for full details. | |
f740a279 | 18 | * |
19 | * This program is free software; you can redistribute it and/or modify | |
20 | * it under the terms of the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
26ac0430 | 23 | * |
f740a279 | 24 | * This program is distributed in the hope that it will be useful, |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
26ac0430 | 28 | * |
f740a279 | 29 | * You should have received a copy of the GNU General Public License |
30 | * along with this program; if not, write to the Free Software | |
31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
32 | * | |
33 | */ | |
34 | ||
74addf6c | 35 | #include "squid.h" |
51ee7c82 | 36 | #include "helper.h" |
985c86bc | 37 | #include "SquidTime.h" |
e6ccf245 | 38 | #include "Store.h" |
42679bd6 | 39 | #include "comm.h" |
0eb49b6d | 40 | #include "MemBuf.h" |
d295d770 | 41 | #include "wordlist.h" |
74addf6c | 42 | |
43 | #define HELPER_MAX_ARGS 64 | |
44 | ||
7f37478b AJ |
45 | /* size of helper read buffer (maximum?). no reason given for this size */ |
46 | /* though it has been seen to be too short for some requests */ | |
47 | /* it is dynamic, so increasng should not have side effects */ | |
48 | #define BUF_8KB 8192 | |
49 | ||
c4b7a5a9 | 50 | static IOCB helperHandleRead; |
51 | static IOCB helperStatefulHandleRead; | |
1f5f60dd | 52 | static PF helperServerFree; |
94439e4e | 53 | static PF helperStatefulServerFree; |
74addf6c | 54 | static void Enqueue(helper * hlp, helper_request *); |
55 | static helper_request *Dequeue(helper * hlp); | |
94439e4e | 56 | static helper_stateful_request *StatefulDequeue(statefulhelper * hlp); |
74addf6c | 57 | static helper_server *GetFirstAvailable(helper * hlp); |
94439e4e | 58 | static helper_stateful_server *StatefulGetFirstAvailable(statefulhelper * hlp); |
74addf6c | 59 | static void helperDispatch(helper_server * srv, helper_request * r); |
94439e4e | 60 | static void helperStatefulDispatch(helper_stateful_server * srv, helper_stateful_request * r); |
74addf6c | 61 | static void helperKickQueue(helper * hlp); |
94439e4e | 62 | static void helperStatefulKickQueue(statefulhelper * hlp); |
a8c4f8d6 | 63 | static void helperStatefulServerDone(helper_stateful_server * srv); |
74addf6c | 64 | static void helperRequestFree(helper_request * r); |
94439e4e | 65 | static void helperStatefulRequestFree(helper_stateful_request * r); |
66 | static void StatefulEnqueue(statefulhelper * hlp, helper_stateful_request * r); | |
9522b380 | 67 | static bool helperStartStats(StoreEntry *sentry, void *hlp, const char *label); |
68 | ||
74addf6c | 69 | |
aa839030 | 70 | CBDATA_TYPE(helper); |
71 | CBDATA_TYPE(helper_server); | |
72 | CBDATA_TYPE(statefulhelper); | |
73 | CBDATA_TYPE(helper_stateful_server); | |
74 | ||
74addf6c | 75 | void |
76 | helperOpenServers(helper * hlp) | |
77 | { | |
78 | char *s; | |
79 | char *progname; | |
80 | char *shortname; | |
81 | char *procname; | |
1b8af627 | 82 | const char *args[HELPER_MAX_ARGS+1]; // save space for a NULL terminator |
74addf6c | 83 | char fd_note_buf[FD_DESC_SZ]; |
84 | helper_server *srv; | |
85 | int nargs = 0; | |
86 | int k; | |
b5d712b5 | 87 | pid_t pid; |
74addf6c | 88 | int rfd; |
89 | int wfd; | |
b5d712b5 | 90 | void * hIpc; |
74addf6c | 91 | wordlist *w; |
62e76326 | 92 | |
74addf6c | 93 | if (hlp->cmdline == NULL) |
62e76326 | 94 | return; |
95 | ||
74addf6c | 96 | progname = hlp->cmdline->key; |
62e76326 | 97 | |
74addf6c | 98 | if ((s = strrchr(progname, '/'))) |
62e76326 | 99 | shortname = xstrdup(s + 1); |
74addf6c | 100 | else |
62e76326 | 101 | shortname = xstrdup(progname); |
102 | ||
5a5b2c56 | 103 | /* dont ever start more than hlp->n_to_start processes. */ |
d974a072 | 104 | int need_new = hlp->n_to_start - hlp->n_active; |
5a5b2c56 AJ |
105 | |
106 | debugs(84, 1, "helperOpenServers: Starting " << need_new << "/" << hlp->n_to_start << " '" << shortname << "' processes"); | |
107 | ||
04f7fd38 | 108 | if (need_new < 1) { |
5a5b2c56 AJ |
109 | debugs(84, 1, "helperOpenServers: No '" << shortname << "' processes needed."); |
110 | } | |
62e76326 | 111 | |
e6ccf245 | 112 | procname = (char *)xmalloc(strlen(shortname) + 3); |
62e76326 | 113 | |
74addf6c | 114 | snprintf(procname, strlen(shortname) + 3, "(%s)", shortname); |
62e76326 | 115 | |
74addf6c | 116 | args[nargs++] = procname; |
62e76326 | 117 | |
74addf6c | 118 | for (w = hlp->cmdline->next; w && nargs < HELPER_MAX_ARGS; w = w->next) |
62e76326 | 119 | args[nargs++] = w->key; |
120 | ||
74addf6c | 121 | args[nargs++] = NULL; |
62e76326 | 122 | |
74addf6c | 123 | assert(nargs <= HELPER_MAX_ARGS); |
62e76326 | 124 | |
5a5b2c56 | 125 | for (k = 0; k < need_new; k++) { |
62e76326 | 126 | getCurrentTime(); |
127 | rfd = wfd = -1; | |
b5d712b5 | 128 | pid = ipcCreate(hlp->ipc_type, |
129 | progname, | |
130 | args, | |
131 | shortname, | |
cc192b50 | 132 | hlp->addr, |
b5d712b5 | 133 | &rfd, |
134 | &wfd, | |
135 | &hIpc); | |
136 | ||
137 | if (pid < 0) { | |
bf8fe701 | 138 | debugs(84, 1, "WARNING: Cannot run '" << progname << "' process."); |
62e76326 | 139 | continue; |
140 | } | |
141 | ||
142 | hlp->n_running++; | |
d8f10d6a | 143 | hlp->n_active++; |
b5d712b5 | 144 | CBDATA_INIT_TYPE(helper_server); |
62e76326 | 145 | srv = cbdataAlloc(helper_server); |
b5d712b5 | 146 | srv->hIpc = hIpc; |
147 | srv->pid = pid; | |
62e76326 | 148 | srv->index = k; |
cc192b50 | 149 | srv->addr = hlp->addr; |
62e76326 | 150 | srv->rfd = rfd; |
151 | srv->wfd = wfd; | |
7f37478b | 152 | srv->rbuf = (char *)memAllocBuf(BUF_8KB, &srv->rbuf_sz); |
90bed1c4 | 153 | srv->wqueue = new MemBuf; |
07eca7e0 | 154 | srv->roffset = 0; |
155 | srv->requests = (helper_request **)xcalloc(hlp->concurrency ? hlp->concurrency : 1, sizeof(*srv->requests)); | |
62e76326 | 156 | srv->parent = cbdataReference(hlp); |
157 | dlinkAddTail(srv, &srv->link, &hlp->servers); | |
158 | ||
159 | if (rfd == wfd) { | |
160 | snprintf(fd_note_buf, FD_DESC_SZ, "%s #%d", shortname, k + 1); | |
161 | fd_note(rfd, fd_note_buf); | |
162 | } else { | |
163 | snprintf(fd_note_buf, FD_DESC_SZ, "reading %s #%d", shortname, k + 1); | |
164 | fd_note(rfd, fd_note_buf); | |
165 | snprintf(fd_note_buf, FD_DESC_SZ, "writing %s #%d", shortname, k + 1); | |
166 | fd_note(wfd, fd_note_buf); | |
167 | } | |
168 | ||
169 | commSetNonBlocking(rfd); | |
170 | ||
171 | if (wfd != rfd) | |
172 | commSetNonBlocking(wfd); | |
173 | ||
174 | comm_add_close_handler(rfd, helperServerFree, srv); | |
07eca7e0 | 175 | |
176 | comm_read(srv->rfd, srv->rbuf, srv->rbuf_sz - 1, helperHandleRead, srv); | |
74addf6c | 177 | } |
62e76326 | 178 | |
5ea33fce | 179 | hlp->last_restart = squid_curtime; |
74addf6c | 180 | safe_free(shortname); |
181 | safe_free(procname); | |
838b993c | 182 | helperKickQueue(hlp); |
74addf6c | 183 | } |
184 | ||
0a6dd8fb | 185 | /** |
4f0ef8e8 | 186 | * DPW 2007-05-08 |
26ac0430 | 187 | * |
4f0ef8e8 | 188 | * helperStatefulOpenServers: create the stateful child helper processes |
189 | */ | |
94439e4e | 190 | void |
191 | helperStatefulOpenServers(statefulhelper * hlp) | |
192 | { | |
94439e4e | 193 | char *shortname; |
1b8af627 | 194 | const char *args[HELPER_MAX_ARGS+1]; // save space for a NULL terminator |
94439e4e | 195 | char fd_note_buf[FD_DESC_SZ]; |
94439e4e | 196 | int nargs = 0; |
62e76326 | 197 | |
94439e4e | 198 | if (hlp->cmdline == NULL) |
62e76326 | 199 | return; |
200 | ||
4f0ef8e8 | 201 | char *progname = hlp->cmdline->key; |
62e76326 | 202 | |
4f0ef8e8 | 203 | char *s; |
94439e4e | 204 | if ((s = strrchr(progname, '/'))) |
62e76326 | 205 | shortname = xstrdup(s + 1); |
94439e4e | 206 | else |
62e76326 | 207 | shortname = xstrdup(progname); |
208 | ||
5a5b2c56 | 209 | /* dont ever start more than hlp->n_to_start processes. */ |
d974a072 AJ |
210 | /* n_active are the helpers which have not been shut down. */ |
211 | int need_new = hlp->n_to_start - hlp->n_active; | |
5a5b2c56 AJ |
212 | |
213 | debugs(84, 1, "helperOpenServers: Starting " << need_new << "/" << hlp->n_to_start << " '" << shortname << "' processes"); | |
214 | ||
04f7fd38 | 215 | if (need_new < 1) { |
5a5b2c56 AJ |
216 | debugs(84, 1, "helperStatefulOpenServers: No '" << shortname << "' processes needed."); |
217 | } | |
62e76326 | 218 | |
4f0ef8e8 | 219 | char *procname = (char *)xmalloc(strlen(shortname) + 3); |
62e76326 | 220 | |
94439e4e | 221 | snprintf(procname, strlen(shortname) + 3, "(%s)", shortname); |
62e76326 | 222 | |
94439e4e | 223 | args[nargs++] = procname; |
62e76326 | 224 | |
4f0ef8e8 | 225 | for (wordlist *w = hlp->cmdline->next; w && nargs < HELPER_MAX_ARGS; w = w->next) |
62e76326 | 226 | args[nargs++] = w->key; |
227 | ||
94439e4e | 228 | args[nargs++] = NULL; |
62e76326 | 229 | |
94439e4e | 230 | assert(nargs <= HELPER_MAX_ARGS); |
62e76326 | 231 | |
5a5b2c56 | 232 | for (int k = 0; k < need_new; k++) { |
62e76326 | 233 | getCurrentTime(); |
26ac0430 AJ |
234 | int rfd = -1; |
235 | int wfd = -1; | |
236 | void * hIpc; | |
4f0ef8e8 | 237 | pid_t pid = ipcCreate(hlp->ipc_type, |
26ac0430 AJ |
238 | progname, |
239 | args, | |
240 | shortname, | |
241 | hlp->addr, | |
242 | &rfd, | |
243 | &wfd, | |
244 | &hIpc); | |
b5d712b5 | 245 | |
246 | if (pid < 0) { | |
bf8fe701 | 247 | debugs(84, 1, "WARNING: Cannot run '" << progname << "' process."); |
62e76326 | 248 | continue; |
249 | } | |
250 | ||
251 | hlp->n_running++; | |
d8f10d6a | 252 | hlp->n_active++; |
b5d712b5 | 253 | CBDATA_INIT_TYPE(helper_stateful_server); |
4f0ef8e8 | 254 | helper_stateful_server *srv = cbdataAlloc(helper_stateful_server); |
b5d712b5 | 255 | srv->hIpc = hIpc; |
256 | srv->pid = pid; | |
360d26ea | 257 | srv->flags.reserved = 0; |
62e76326 | 258 | srv->stats.submits = 0; |
259 | srv->stats.releases = 0; | |
260 | srv->index = k; | |
cc192b50 | 261 | srv->addr = hlp->addr; |
62e76326 | 262 | srv->rfd = rfd; |
263 | srv->wfd = wfd; | |
7f37478b | 264 | srv->rbuf = (char *)memAllocBuf(BUF_8KB, &srv->rbuf_sz); |
07eca7e0 | 265 | srv->roffset = 0; |
62e76326 | 266 | srv->parent = cbdataReference(hlp); |
267 | ||
268 | if (hlp->datapool != NULL) | |
b001e822 | 269 | srv->data = hlp->datapool->alloc(); |
62e76326 | 270 | |
271 | dlinkAddTail(srv, &srv->link, &hlp->servers); | |
272 | ||
273 | if (rfd == wfd) { | |
274 | snprintf(fd_note_buf, FD_DESC_SZ, "%s #%d", shortname, k + 1); | |
275 | fd_note(rfd, fd_note_buf); | |
276 | } else { | |
277 | snprintf(fd_note_buf, FD_DESC_SZ, "reading %s #%d", shortname, k + 1); | |
278 | fd_note(rfd, fd_note_buf); | |
279 | snprintf(fd_note_buf, FD_DESC_SZ, "writing %s #%d", shortname, k + 1); | |
280 | fd_note(wfd, fd_note_buf); | |
281 | } | |
282 | ||
283 | commSetNonBlocking(rfd); | |
284 | ||
285 | if (wfd != rfd) | |
286 | commSetNonBlocking(wfd); | |
287 | ||
288 | comm_add_close_handler(rfd, helperStatefulServerFree, srv); | |
07eca7e0 | 289 | |
290 | comm_read(srv->rfd, srv->rbuf, srv->rbuf_sz - 1, helperStatefulHandleRead, srv); | |
94439e4e | 291 | } |
62e76326 | 292 | |
5ea33fce | 293 | hlp->last_restart = squid_curtime; |
94439e4e | 294 | safe_free(shortname); |
295 | safe_free(procname); | |
296 | helperStatefulKickQueue(hlp); | |
297 | } | |
298 | ||
299 | ||
74addf6c | 300 | void |
301 | helperSubmit(helper * hlp, const char *buf, HLPCB * callback, void *data) | |
302 | { | |
5b5f9257 | 303 | if (hlp == NULL) { |
bf8fe701 | 304 | debugs(84, 3, "helperSubmit: hlp == NULL"); |
62e76326 | 305 | callback(data, NULL); |
306 | return; | |
5b5f9257 | 307 | } |
62e76326 | 308 | |
eff7218b | 309 | helper_request *r = new helper_request; |
310 | helper_server *srv; | |
311 | ||
74addf6c | 312 | r->callback = callback; |
fa80a8ef | 313 | r->data = cbdataReference(data); |
74addf6c | 314 | r->buf = xstrdup(buf); |
62e76326 | 315 | |
74addf6c | 316 | if ((srv = GetFirstAvailable(hlp))) |
62e76326 | 317 | helperDispatch(srv, r); |
74addf6c | 318 | else |
62e76326 | 319 | Enqueue(hlp, r); |
320 | ||
bf8fe701 | 321 | debugs(84, 9, "helperSubmit: " << buf); |
94439e4e | 322 | } |
323 | ||
0a6dd8fb | 324 | /// lastserver = "server last used as part of a reserved request sequence" |
94439e4e | 325 | void |
326 | helperStatefulSubmit(statefulhelper * hlp, const char *buf, HLPSCB * callback, void *data, helper_stateful_server * lastserver) | |
327 | { | |
94439e4e | 328 | if (hlp == NULL) { |
bf8fe701 | 329 | debugs(84, 3, "helperStatefulSubmit: hlp == NULL"); |
62e76326 | 330 | callback(data, 0, NULL); |
331 | return; | |
94439e4e | 332 | } |
62e76326 | 333 | |
eff7218b | 334 | helper_stateful_request *r = new helper_stateful_request; |
eff7218b | 335 | |
94439e4e | 336 | r->callback = callback; |
fa80a8ef | 337 | r->data = cbdataReference(data); |
62e76326 | 338 | |
721b0310 | 339 | if (buf != NULL) { |
62e76326 | 340 | r->buf = xstrdup(buf); |
341 | r->placeholder = 0; | |
721b0310 | 342 | } else { |
62e76326 | 343 | r->buf = NULL; |
344 | r->placeholder = 1; | |
721b0310 | 345 | } |
62e76326 | 346 | |
94439e4e | 347 | if ((buf != NULL) && lastserver) { |
bf8fe701 | 348 | debugs(84, 5, "StatefulSubmit with lastserver " << lastserver); |
360d26ea | 349 | assert(lastserver->flags.reserved); |
a80b46e3 | 350 | assert(!(lastserver->request)); |
62e76326 | 351 | |
d20ce97d HN |
352 | debugs(84, 5, "StatefulSubmit dispatching"); |
353 | helperStatefulDispatch(lastserver, r); | |
94439e4e | 354 | } else { |
26ac0430 | 355 | helper_stateful_server *srv; |
62e76326 | 356 | if ((srv = StatefulGetFirstAvailable(hlp))) { |
357 | helperStatefulDispatch(srv, r); | |
358 | } else | |
359 | StatefulEnqueue(hlp, r); | |
94439e4e | 360 | } |
62e76326 | 361 | |
bf8fe701 | 362 | debugs(84, 9, "helperStatefulSubmit: placeholder: '" << r->placeholder << "', buf '" << buf << "'."); |
94439e4e | 363 | } |
364 | ||
0a6dd8fb | 365 | /** |
4f0ef8e8 | 366 | * DPW 2007-05-08 |
367 | * | |
368 | * helperStatefulReleaseServer tells the helper that whoever was | |
369 | * using it no longer needs its services. | |
4f0ef8e8 | 370 | */ |
94439e4e | 371 | void |
372 | helperStatefulReleaseServer(helper_stateful_server * srv) | |
94439e4e | 373 | { |
4f0ef8e8 | 374 | debugs(84, 3, HERE << "srv-" << srv->index << " flags.reserved = " << srv->flags.reserved); |
360d26ea | 375 | if (!srv->flags.reserved) |
be29fa07 | 376 | return; |
4f0ef8e8 | 377 | |
60d096f4 | 378 | srv->stats.releases++; |
62e76326 | 379 | |
360d26ea | 380 | srv->flags.reserved = 0; |
4f0ef8e8 | 381 | if (srv->parent->OnEmptyQueue != NULL && srv->data) |
26ac0430 | 382 | srv->parent->OnEmptyQueue(srv->data); |
420e3e30 | 383 | |
a8c4f8d6 | 384 | helperStatefulServerDone(srv); |
94439e4e | 385 | } |
386 | ||
0a6dd8fb | 387 | /** return a pointer to the stateful routines data area */ |
94439e4e | 388 | void * |
389 | helperStatefulServerGetData(helper_stateful_server * srv) | |
94439e4e | 390 | { |
391 | return srv->data; | |
74addf6c | 392 | } |
393 | ||
0a6dd8fb AJ |
394 | /** |
395 | * Dump some stats about the helper states to a StoreEntry | |
396 | */ | |
74addf6c | 397 | void |
9522b380 | 398 | helperStats(StoreEntry * sentry, helper * hlp, const char *label) |
74addf6c | 399 | { |
9522b380 | 400 | if (!helperStartStats(sentry, hlp, label)) |
401 | return; | |
402 | ||
0a706c69 | 403 | storeAppendPrintf(sentry, "program: %s\n", |
62e76326 | 404 | hlp->cmdline->key); |
d974a072 AJ |
405 | storeAppendPrintf(sentry, "number active: %d of %d (%d shutting down)\n", |
406 | hlp->n_active, hlp->n_to_start, (hlp->n_running - hlp->n_active) ); | |
74addf6c | 407 | storeAppendPrintf(sentry, "requests sent: %d\n", |
62e76326 | 408 | hlp->stats.requests); |
74addf6c | 409 | storeAppendPrintf(sentry, "replies received: %d\n", |
62e76326 | 410 | hlp->stats.replies); |
74addf6c | 411 | storeAppendPrintf(sentry, "queue length: %d\n", |
62e76326 | 412 | hlp->stats.queue_size); |
f9598528 | 413 | storeAppendPrintf(sentry, "avg service time: %d msec\n", |
414 | hlp->stats.avg_svc_time); | |
74addf6c | 415 | storeAppendPrintf(sentry, "\n"); |
09c1ece1 | 416 | storeAppendPrintf(sentry, "%7s\t%7s\t%7s\t%11s\t%s\t%7s\t%7s\t%7s\n", |
62e76326 | 417 | "#", |
418 | "FD", | |
419 | "PID", | |
420 | "# Requests", | |
421 | "Flags", | |
422 | "Time", | |
423 | "Offset", | |
424 | "Request"); | |
425 | ||
4f0ef8e8 | 426 | for (dlink_node *link = hlp->servers.head; link; link = link->next) { |
07eca7e0 | 427 | helper_server *srv = (helper_server*)link->data; |
f9598528 | 428 | double tt = 0.001 * (srv->requests[0] ? tvSubMsec(srv->requests[0]->dispatch_time, current_time) : tvSubMsec(srv->dispatch_time, srv->answer_time)); |
d8f10d6a | 429 | storeAppendPrintf(sentry, "%7d\t%7d\t%7d\t%11d\t%c%c%c%c\t%7.3f\t%7d\t%s\n", |
62e76326 | 430 | srv->index + 1, |
431 | srv->rfd, | |
432 | srv->pid, | |
433 | srv->stats.uses, | |
07eca7e0 | 434 | srv->stats.pending ? 'B' : ' ', |
435 | srv->flags.writing ? 'W' : ' ', | |
62e76326 | 436 | srv->flags.closing ? 'C' : ' ', |
437 | srv->flags.shutdown ? 'S' : ' ', | |
438 | tt < 0.0 ? 0.0 : tt, | |
07eca7e0 | 439 | (int) srv->roffset, |
440 | srv->requests[0] ? log_quote(srv->requests[0]->buf) : "(none)"); | |
74addf6c | 441 | } |
62e76326 | 442 | |
74addf6c | 443 | storeAppendPrintf(sentry, "\nFlags key:\n\n"); |
74addf6c | 444 | storeAppendPrintf(sentry, " B = BUSY\n"); |
f9598528 | 445 | storeAppendPrintf(sentry, " W = WRITING\n"); |
74addf6c | 446 | storeAppendPrintf(sentry, " C = CLOSING\n"); |
d974a072 | 447 | storeAppendPrintf(sentry, " S = SHUTDOWN PENDING\n"); |
74addf6c | 448 | } |
449 | ||
94439e4e | 450 | void |
9522b380 | 451 | helperStatefulStats(StoreEntry * sentry, statefulhelper * hlp, const char *label) |
94439e4e | 452 | { |
9522b380 | 453 | if (!helperStartStats(sentry, hlp, label)) |
454 | return; | |
455 | ||
cf154edc | 456 | storeAppendPrintf(sentry, "program: %s\n", |
457 | hlp->cmdline->key); | |
d974a072 AJ |
458 | storeAppendPrintf(sentry, "number active: %d of %d (%d shutting down)\n", |
459 | hlp->n_active, hlp->n_to_start, (hlp->n_running - hlp->n_active) ); | |
94439e4e | 460 | storeAppendPrintf(sentry, "requests sent: %d\n", |
62e76326 | 461 | hlp->stats.requests); |
94439e4e | 462 | storeAppendPrintf(sentry, "replies received: %d\n", |
62e76326 | 463 | hlp->stats.replies); |
94439e4e | 464 | storeAppendPrintf(sentry, "queue length: %d\n", |
62e76326 | 465 | hlp->stats.queue_size); |
94439e4e | 466 | storeAppendPrintf(sentry, "avg service time: %d msec\n", |
62e76326 | 467 | hlp->stats.avg_svc_time); |
94439e4e | 468 | storeAppendPrintf(sentry, "\n"); |
3900cea9 | 469 | storeAppendPrintf(sentry, "%7s\t%7s\t%7s\t%11s\t%6s\t%7s\t%7s\t%7s\n", |
62e76326 | 470 | "#", |
471 | "FD", | |
472 | "PID", | |
473 | "# Requests", | |
62e76326 | 474 | "Flags", |
475 | "Time", | |
476 | "Offset", | |
477 | "Request"); | |
478 | ||
4f0ef8e8 | 479 | for (dlink_node *link = hlp->servers.head; link; link = link->next) { |
480 | helper_stateful_server *srv = (helper_stateful_server *)link->data; | |
0a6dd8fb | 481 | double tt = 0.001 * tvSubMsec(srv->dispatch_time, srv->flags.busy ? current_time : srv->answer_time); |
d20ce97d | 482 | storeAppendPrintf(sentry, "%7d\t%7d\t%7d\t%11d\t%c%c%c%c%c\t%7.3f\t%7d\t%s\n", |
62e76326 | 483 | srv->index + 1, |
484 | srv->rfd, | |
485 | srv->pid, | |
486 | srv->stats.uses, | |
62e76326 | 487 | srv->flags.busy ? 'B' : ' ', |
488 | srv->flags.closing ? 'C' : ' ', | |
360d26ea | 489 | srv->flags.reserved ? 'R' : ' ', |
62e76326 | 490 | srv->flags.shutdown ? 'S' : ' ', |
491 | srv->request ? (srv->request->placeholder ? 'P' : ' ') : ' ', | |
e1381638 AJ |
492 | tt < 0.0 ? 0.0 : tt, |
493 | (int) srv->roffset, | |
494 | srv->request ? log_quote(srv->request->buf) : "(none)"); | |
94439e4e | 495 | } |
62e76326 | 496 | |
94439e4e | 497 | storeAppendPrintf(sentry, "\nFlags key:\n\n"); |
94439e4e | 498 | storeAppendPrintf(sentry, " B = BUSY\n"); |
499 | storeAppendPrintf(sentry, " C = CLOSING\n"); | |
d20ce97d | 500 | storeAppendPrintf(sentry, " R = RESERVED\n"); |
d974a072 | 501 | storeAppendPrintf(sentry, " S = SHUTDOWN PENDING\n"); |
5d146f7d | 502 | storeAppendPrintf(sentry, " P = PLACEHOLDER\n"); |
94439e4e | 503 | } |
504 | ||
74addf6c | 505 | void |
506 | helperShutdown(helper * hlp) | |
507 | { | |
c68e9c6b | 508 | dlink_node *link = hlp->servers.head; |
2d5d5261 | 509 | #ifdef _SQUID_MSWIN_ |
510 | ||
511 | HANDLE hIpc; | |
512 | pid_t pid; | |
513 | int no; | |
514 | #endif | |
62e76326 | 515 | |
c68e9c6b | 516 | while (link) { |
62e76326 | 517 | helper_server *srv; |
518 | srv = (helper_server *)link->data; | |
519 | link = link->next; | |
520 | ||
8cfc76db | 521 | if (srv->flags.shutdown) { |
bf8fe701 | 522 | debugs(84, 3, "helperShutdown: " << hlp->id_name << " #" << srv->index + 1 << " has already SHUT DOWN."); |
62e76326 | 523 | continue; |
524 | } | |
525 | ||
d8f10d6a | 526 | hlp->n_active--; |
527 | assert(hlp->n_active >= 0); | |
62e76326 | 528 | srv->flags.shutdown = 1; /* request it to shut itself down */ |
529 | ||
d8f10d6a | 530 | if (srv->flags.closing) { |
bf8fe701 | 531 | debugs(84, 3, "helperShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is CLOSING."); |
62e76326 | 532 | continue; |
533 | } | |
534 | ||
d8f10d6a | 535 | if (srv->stats.pending) { |
bf8fe701 | 536 | debugs(84, 3, "helperShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is BUSY."); |
62e76326 | 537 | continue; |
538 | } | |
539 | ||
540 | srv->flags.closing = 1; | |
2d5d5261 | 541 | #ifdef _SQUID_MSWIN_ |
542 | ||
543 | hIpc = srv->hIpc; | |
544 | pid = srv->pid; | |
545 | no = srv->index + 1; | |
546 | shutdown(srv->wfd, SD_BOTH); | |
547 | #endif | |
548 | ||
bf8fe701 | 549 | debugs(84, 3, "helperShutdown: " << hlp->id_name << " #" << srv->index + 1 << " shutting down."); |
62e76326 | 550 | /* the rest of the details is dealt with in the helperServerFree |
551 | * close handler | |
552 | */ | |
553 | comm_close(srv->rfd); | |
2d5d5261 | 554 | #ifdef _SQUID_MSWIN_ |
555 | ||
556 | if (hIpc) { | |
557 | if (WaitForSingleObject(hIpc, 5000) != WAIT_OBJECT_0) { | |
558 | getCurrentTime(); | |
bf8fe701 | 559 | debugs(84, 1, "helperShutdown: WARNING: " << hlp->id_name << |
560 | " #" << no << " (" << hlp->cmdline->key << "," << | |
561 | (long int)pid << ") didn't exit in 5 seconds"); | |
562 | ||
2d5d5261 | 563 | } |
564 | ||
565 | CloseHandle(hIpc); | |
566 | } | |
567 | ||
568 | #endif | |
569 | ||
74addf6c | 570 | } |
571 | } | |
572 | ||
94439e4e | 573 | void |
574 | helperStatefulShutdown(statefulhelper * hlp) | |
575 | { | |
576 | dlink_node *link = hlp->servers.head; | |
577 | helper_stateful_server *srv; | |
2d5d5261 | 578 | #ifdef _SQUID_MSWIN_ |
579 | ||
580 | HANDLE hIpc; | |
581 | pid_t pid; | |
582 | int no; | |
583 | #endif | |
62e76326 | 584 | |
94439e4e | 585 | while (link) { |
62e76326 | 586 | srv = (helper_stateful_server *)link->data; |
587 | link = link->next; | |
588 | ||
8cfc76db | 589 | if (srv->flags.shutdown) { |
bf8fe701 | 590 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " has already SHUT DOWN."); |
62e76326 | 591 | continue; |
592 | } | |
593 | ||
d8f10d6a | 594 | hlp->n_active--; |
595 | assert(hlp->n_active >= 0); | |
62e76326 | 596 | srv->flags.shutdown = 1; /* request it to shut itself down */ |
597 | ||
598 | if (srv->flags.busy) { | |
bf8fe701 | 599 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is BUSY."); |
62e76326 | 600 | continue; |
601 | } | |
602 | ||
603 | if (srv->flags.closing) { | |
bf8fe701 | 604 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is CLOSING."); |
62e76326 | 605 | continue; |
606 | } | |
607 | ||
360d26ea | 608 | if (srv->flags.reserved) { |
d7e0f901 AJ |
609 | if (shutting_down) { |
610 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is RESERVED. Closing anyway."); | |
e1381638 | 611 | } else { |
d7e0f901 AJ |
612 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " is RESERVED. Not Shutting Down Yet."); |
613 | continue; | |
614 | } | |
62e76326 | 615 | } |
616 | ||
62e76326 | 617 | srv->flags.closing = 1; |
2d5d5261 | 618 | #ifdef _SQUID_MSWIN_ |
619 | ||
620 | hIpc = srv->hIpc; | |
621 | pid = srv->pid; | |
622 | no = srv->index + 1; | |
623 | shutdown(srv->wfd, SD_BOTH); | |
624 | #endif | |
625 | ||
bf8fe701 | 626 | debugs(84, 3, "helperStatefulShutdown: " << hlp->id_name << " #" << srv->index + 1 << " shutting down."); |
627 | ||
62e76326 | 628 | /* the rest of the details is dealt with in the helperStatefulServerFree |
629 | * close handler | |
630 | */ | |
631 | comm_close(srv->rfd); | |
2d5d5261 | 632 | #ifdef _SQUID_MSWIN_ |
633 | ||
634 | if (hIpc) { | |
635 | if (WaitForSingleObject(hIpc, 5000) != WAIT_OBJECT_0) { | |
636 | getCurrentTime(); | |
bf8fe701 | 637 | debugs(84, 1, "helperShutdown: WARNING: " << hlp->id_name << |
638 | " #" << no << " (" << hlp->cmdline->key << "," << | |
639 | (long int)pid << ") didn't exit in 5 seconds"); | |
2d5d5261 | 640 | } |
641 | ||
642 | CloseHandle(hIpc); | |
643 | } | |
644 | ||
645 | #endif | |
646 | ||
94439e4e | 647 | } |
648 | } | |
649 | ||
650 | ||
1f5f60dd | 651 | helper * |
652 | helperCreate(const char *name) | |
653 | { | |
28c60158 | 654 | helper *hlp; |
aa839030 | 655 | CBDATA_INIT_TYPE(helper); |
72711e31 | 656 | hlp = cbdataAlloc(helper); |
1f5f60dd | 657 | hlp->id_name = name; |
658 | return hlp; | |
659 | } | |
660 | ||
94439e4e | 661 | statefulhelper * |
662 | helperStatefulCreate(const char *name) | |
663 | { | |
664 | statefulhelper *hlp; | |
aa839030 | 665 | CBDATA_INIT_TYPE(statefulhelper); |
72711e31 | 666 | hlp = cbdataAlloc(statefulhelper); |
94439e4e | 667 | hlp->id_name = name; |
668 | return hlp; | |
669 | } | |
670 | ||
671 | ||
1f5f60dd | 672 | void |
673 | helperFree(helper * hlp) | |
674 | { | |
5dae8514 | 675 | if (!hlp) |
62e76326 | 676 | return; |
677 | ||
1f5f60dd | 678 | /* note, don't free hlp->name, it probably points to static memory */ |
fe73896c | 679 | if (hlp->queue.head) |
bf8fe701 | 680 | debugs(84, 0, "WARNING: freeing " << hlp->id_name << " helper with " << |
681 | hlp->stats.queue_size << " requests queued"); | |
62e76326 | 682 | |
1f5f60dd | 683 | cbdataFree(hlp); |
684 | } | |
685 | ||
94439e4e | 686 | void |
687 | helperStatefulFree(statefulhelper * hlp) | |
688 | { | |
5dae8514 | 689 | if (!hlp) |
62e76326 | 690 | return; |
691 | ||
94439e4e | 692 | /* note, don't free hlp->name, it probably points to static memory */ |
693 | if (hlp->queue.head) | |
bf8fe701 | 694 | debugs(84, 0, "WARNING: freeing " << hlp->id_name << " helper with " << |
695 | hlp->stats.queue_size << " requests queued"); | |
62e76326 | 696 | |
94439e4e | 697 | cbdataFree(hlp); |
698 | } | |
699 | ||
700 | ||
74addf6c | 701 | /* ====================================================================== */ |
702 | /* LOCAL FUNCTIONS */ | |
703 | /* ====================================================================== */ | |
704 | ||
705 | static void | |
1f5f60dd | 706 | helperServerFree(int fd, void *data) |
74addf6c | 707 | { |
e6ccf245 | 708 | helper_server *srv = (helper_server *)data; |
74addf6c | 709 | helper *hlp = srv->parent; |
ac750329 | 710 | helper_request *r; |
07eca7e0 | 711 | int i, concurrency = hlp->concurrency; |
712 | ||
713 | if (!concurrency) | |
714 | concurrency = 1; | |
715 | ||
07eca7e0 | 716 | if (srv->rbuf) { |
717 | memFreeBuf(srv->rbuf_sz, srv->rbuf); | |
718 | srv->rbuf = NULL; | |
74addf6c | 719 | } |
62e76326 | 720 | |
2fe7eff9 | 721 | srv->wqueue->clean(); |
032785bf | 722 | delete srv->wqueue; |
723 | ||
724 | if (srv->writebuf) { | |
2fe7eff9 | 725 | srv->writebuf->clean(); |
032785bf | 726 | delete srv->writebuf; |
727 | srv->writebuf = NULL; | |
728 | } | |
62e76326 | 729 | |
07eca7e0 | 730 | for (i = 0; i < concurrency; i++) { |
731 | if ((r = srv->requests[i])) { | |
732 | void *cbdata; | |
62e76326 | 733 | |
07eca7e0 | 734 | if (cbdataReferenceValidDone(r->data, &cbdata)) |
735 | r->callback(cbdata, NULL); | |
62e76326 | 736 | |
07eca7e0 | 737 | helperRequestFree(r); |
738 | ||
739 | srv->requests[i] = NULL; | |
740 | } | |
ac750329 | 741 | } |
62e76326 | 742 | |
07eca7e0 | 743 | safe_free(srv->requests); |
744 | ||
3cdb7cd0 | 745 | if (srv->wfd != srv->rfd && srv->wfd != -1) |
62e76326 | 746 | comm_close(srv->wfd); |
747 | ||
74addf6c | 748 | dlinkDelete(&srv->link, &hlp->servers); |
62e76326 | 749 | |
74addf6c | 750 | hlp->n_running--; |
62e76326 | 751 | |
74addf6c | 752 | assert(hlp->n_running >= 0); |
62e76326 | 753 | |
1f5f60dd | 754 | if (!srv->flags.shutdown) { |
d8f10d6a | 755 | hlp->n_active--; |
756 | assert(hlp->n_active >= 0); | |
bf8fe701 | 757 | debugs(84, 0, "WARNING: " << hlp->id_name << " #" << srv->index + 1 << |
758 | " (FD " << fd << ") exited"); | |
62e76326 | 759 | |
5ea33fce | 760 | if (hlp->n_active < hlp->n_to_start / 2) { |
bf8fe701 | 761 | debugs(80, 0, "Too few " << hlp->id_name << " processes are running"); |
5ea33fce | 762 | |
763 | if (hlp->last_restart > squid_curtime - 30) | |
764 | fatalf("The %s helpers are crashing too rapidly, need help!\n", hlp->id_name); | |
765 | ||
bf8fe701 | 766 | debugs(80, 0, "Starting new helpers"); |
5ea33fce | 767 | |
768 | helperOpenServers(hlp); | |
769 | } | |
14e87a44 | 770 | } |
62e76326 | 771 | |
fa80a8ef | 772 | cbdataReferenceDone(srv->parent); |
14e87a44 | 773 | cbdataFree(srv); |
74addf6c | 774 | } |
775 | ||
94439e4e | 776 | static void |
777 | helperStatefulServerFree(int fd, void *data) | |
778 | { | |
e6ccf245 | 779 | helper_stateful_server *srv = (helper_stateful_server *)data; |
94439e4e | 780 | statefulhelper *hlp = srv->parent; |
781 | helper_stateful_request *r; | |
62e76326 | 782 | |
07eca7e0 | 783 | if (srv->rbuf) { |
784 | memFreeBuf(srv->rbuf_sz, srv->rbuf); | |
785 | srv->rbuf = NULL; | |
94439e4e | 786 | } |
62e76326 | 787 | |
07eca7e0 | 788 | #if 0 |
2fe7eff9 | 789 | srv->wqueue->clean(); |
032785bf | 790 | |
791 | delete srv->wqueue; | |
07eca7e0 | 792 | |
793 | #endif | |
794 | ||
94439e4e | 795 | if ((r = srv->request)) { |
62e76326 | 796 | void *cbdata; |
797 | ||
798 | if (cbdataReferenceValidDone(r->data, &cbdata)) | |
07eca7e0 | 799 | r->callback(cbdata, srv, NULL); |
62e76326 | 800 | |
801 | helperStatefulRequestFree(r); | |
802 | ||
803 | srv->request = NULL; | |
94439e4e | 804 | } |
62e76326 | 805 | |
3c641669 | 806 | /* TODO: walk the local queue of requests and carry them all out */ |
94439e4e | 807 | if (srv->wfd != srv->rfd && srv->wfd != -1) |
62e76326 | 808 | comm_close(srv->wfd); |
809 | ||
94439e4e | 810 | dlinkDelete(&srv->link, &hlp->servers); |
62e76326 | 811 | |
94439e4e | 812 | hlp->n_running--; |
62e76326 | 813 | |
94439e4e | 814 | assert(hlp->n_running >= 0); |
62e76326 | 815 | |
94439e4e | 816 | if (!srv->flags.shutdown) { |
d8f10d6a | 817 | hlp->n_active--; |
818 | assert( hlp->n_active >= 0); | |
bf8fe701 | 819 | debugs(84, 0, "WARNING: " << hlp->id_name << " #" << srv->index + 1 << " (FD " << fd << ") exited"); |
62e76326 | 820 | |
5ea33fce | 821 | if (hlp->n_active <= hlp->n_to_start / 2) { |
bf8fe701 | 822 | debugs(80, 0, "Too few " << hlp->id_name << " processes are running"); |
5ea33fce | 823 | |
824 | if (hlp->last_restart > squid_curtime - 30) | |
825 | fatalf("The %s helpers are crashing too rapidly, need help!\n", hlp->id_name); | |
826 | ||
bf8fe701 | 827 | debugs(80, 0, "Starting new helpers"); |
5ea33fce | 828 | |
829 | helperStatefulOpenServers(hlp); | |
830 | } | |
94439e4e | 831 | } |
62e76326 | 832 | |
94439e4e | 833 | if (srv->data != NULL) |
b001e822 | 834 | hlp->datapool->free(srv->data); |
62e76326 | 835 | |
fa80a8ef | 836 | cbdataReferenceDone(srv->parent); |
62e76326 | 837 | |
94439e4e | 838 | cbdataFree(srv); |
839 | } | |
840 | ||
841 | ||
74addf6c | 842 | static void |
c4b7a5a9 | 843 | helperHandleRead(int fd, char *buf, size_t len, comm_err_t flag, int xerrno, void *data) |
74addf6c | 844 | { |
74addf6c | 845 | char *t = NULL; |
e6ccf245 | 846 | helper_server *srv = (helper_server *)data; |
74addf6c | 847 | helper *hlp = srv->parent; |
fa80a8ef | 848 | assert(cbdataReferenceValid(data)); |
c4b7a5a9 | 849 | |
850 | /* Bail out early on COMM_ERR_CLOSING - close handlers will tidy up for us */ | |
62e76326 | 851 | |
c4b7a5a9 | 852 | if (flag == COMM_ERR_CLOSING) { |
853 | return; | |
854 | } | |
855 | ||
420e3e30 HN |
856 | assert(fd == srv->rfd); |
857 | ||
4f0ef8e8 | 858 | debugs(84, 5, "helperHandleRead: " << len << " bytes from " << hlp->id_name << " #" << srv->index + 1); |
62e76326 | 859 | |
c4b7a5a9 | 860 | if (flag != COMM_OK || len <= 0) { |
62e76326 | 861 | if (len < 0) |
bf8fe701 | 862 | debugs(84, 1, "helperHandleRead: FD " << fd << " read: " << xstrerror()); |
62e76326 | 863 | |
864 | comm_close(fd); | |
865 | ||
866 | return; | |
74addf6c | 867 | } |
62e76326 | 868 | |
07eca7e0 | 869 | srv->roffset += len; |
870 | srv->rbuf[srv->roffset] = '\0'; | |
bf8fe701 | 871 | debugs(84, 9, "helperHandleRead: '" << srv->rbuf << "'"); |
62e76326 | 872 | |
07eca7e0 | 873 | if (!srv->stats.pending) { |
62e76326 | 874 | /* someone spoke without being spoken to */ |
bf8fe701 | 875 | debugs(84, 1, "helperHandleRead: unexpected read from " << |
876 | hlp->id_name << " #" << srv->index + 1 << ", " << (int)len << | |
877 | " bytes '" << srv->rbuf << "'"); | |
878 | ||
07eca7e0 | 879 | srv->roffset = 0; |
880 | srv->rbuf[0] = '\0'; | |
881 | } | |
882 | ||
883 | while ((t = strchr(srv->rbuf, '\n'))) { | |
62e76326 | 884 | /* end of reply found */ |
07eca7e0 | 885 | helper_request *r; |
886 | char *msg = srv->rbuf; | |
887 | int i = 0; | |
bf8fe701 | 888 | debugs(84, 3, "helperHandleRead: end of reply found"); |
6bf4f823 | 889 | |
890 | if (t > srv->rbuf && t[-1] == '\r') | |
891 | t[-1] = '\0'; | |
892 | ||
07eca7e0 | 893 | *t++ = '\0'; |
62e76326 | 894 | |
07eca7e0 | 895 | if (hlp->concurrency) { |
896 | i = strtol(msg, &msg, 10); | |
62e76326 | 897 | |
e4755e29 | 898 | while (*msg && xisspace(*msg)) |
07eca7e0 | 899 | msg++; |
900 | } | |
62e76326 | 901 | |
07eca7e0 | 902 | r = srv->requests[i]; |
62e76326 | 903 | |
07eca7e0 | 904 | if (r) { |
905 | HLPCB *callback = r->callback; | |
906 | void *cbdata; | |
62e76326 | 907 | |
07eca7e0 | 908 | srv->requests[i] = NULL; |
62e76326 | 909 | |
07eca7e0 | 910 | r->callback = NULL; |
62e76326 | 911 | |
07eca7e0 | 912 | if (cbdataReferenceValidDone(r->data, &cbdata)) |
913 | callback(cbdata, msg); | |
62e76326 | 914 | |
07eca7e0 | 915 | srv->stats.pending--; |
916 | ||
917 | hlp->stats.replies++; | |
918 | ||
f9598528 | 919 | srv->answer_time = current_time; |
920 | ||
921 | srv->dispatch_time = r->dispatch_time; | |
922 | ||
07eca7e0 | 923 | hlp->stats.avg_svc_time = |
924 | intAverage(hlp->stats.avg_svc_time, | |
925 | tvSubMsec(r->dispatch_time, current_time), | |
926 | hlp->stats.replies, REDIRECT_AV_FACTOR); | |
927 | ||
928 | helperRequestFree(r); | |
929 | } else { | |
bf8fe701 | 930 | debugs(84, 1, "helperHandleRead: unexpected reply on channel " << |
931 | i << " from " << hlp->id_name << " #" << srv->index + 1 << | |
932 | " '" << srv->rbuf << "'"); | |
933 | ||
07eca7e0 | 934 | } |
935 | ||
936 | srv->roffset -= (t - srv->rbuf); | |
937 | memmove(srv->rbuf, t, srv->roffset + 1); | |
62e76326 | 938 | |
420e3e30 HN |
939 | if (!srv->flags.shutdown) { |
940 | helperKickQueue(hlp); | |
941 | } else if (!srv->flags.closing && !srv->stats.pending) { | |
62e76326 | 942 | int wfd = srv->wfd; |
943 | srv->wfd = -1; | |
420e3e30 HN |
944 | if (srv->rfd == wfd) |
945 | srv->rfd = -1; | |
d8f10d6a | 946 | srv->flags.closing=1; |
62e76326 | 947 | comm_close(wfd); |
26ac0430 | 948 | return; |
420e3e30 | 949 | } |
74addf6c | 950 | } |
07eca7e0 | 951 | |
420e3e30 HN |
952 | if (srv->rfd != -1) |
953 | comm_read(fd, srv->rbuf + srv->roffset, srv->rbuf_sz - srv->roffset - 1, helperHandleRead, srv); | |
74addf6c | 954 | } |
955 | ||
94439e4e | 956 | static void |
c4b7a5a9 | 957 | helperStatefulHandleRead(int fd, char *buf, size_t len, comm_err_t flag, int xerrno, void *data) |
94439e4e | 958 | { |
94439e4e | 959 | char *t = NULL; |
e6ccf245 | 960 | helper_stateful_server *srv = (helper_stateful_server *)data; |
94439e4e | 961 | helper_stateful_request *r; |
962 | statefulhelper *hlp = srv->parent; | |
fa80a8ef | 963 | assert(cbdataReferenceValid(data)); |
c4b7a5a9 | 964 | |
965 | /* Bail out early on COMM_ERR_CLOSING - close handlers will tidy up for us */ | |
62e76326 | 966 | |
c4b7a5a9 | 967 | if (flag == COMM_ERR_CLOSING) { |
968 | return; | |
969 | } | |
970 | ||
420e3e30 HN |
971 | assert(fd == srv->rfd); |
972 | ||
4a7a3d56 | 973 | debugs(84, 5, "helperStatefulHandleRead: " << len << " bytes from " << |
4f0ef8e8 | 974 | hlp->id_name << " #" << srv->index + 1); |
bf8fe701 | 975 | |
62e76326 | 976 | |
c4b7a5a9 | 977 | if (flag != COMM_OK || len <= 0) { |
62e76326 | 978 | if (len < 0) |
bf8fe701 | 979 | debugs(84, 1, "helperStatefulHandleRead: FD " << fd << " read: " << xstrerror()); |
62e76326 | 980 | |
981 | comm_close(fd); | |
982 | ||
983 | return; | |
94439e4e | 984 | } |
62e76326 | 985 | |
07eca7e0 | 986 | srv->roffset += len; |
987 | srv->rbuf[srv->roffset] = '\0'; | |
94439e4e | 988 | r = srv->request; |
62e76326 | 989 | |
94439e4e | 990 | if (r == NULL) { |
62e76326 | 991 | /* someone spoke without being spoken to */ |
bf8fe701 | 992 | debugs(84, 1, "helperStatefulHandleRead: unexpected read from " << |
993 | hlp->id_name << " #" << srv->index + 1 << ", " << (int)len << | |
994 | " bytes '" << srv->rbuf << "'"); | |
995 | ||
07eca7e0 | 996 | srv->roffset = 0; |
997 | } | |
998 | ||
999 | if ((t = strchr(srv->rbuf, '\n'))) { | |
62e76326 | 1000 | /* end of reply found */ |
e1381638 | 1001 | int called = 1; |
bf8fe701 | 1002 | debugs(84, 3, "helperStatefulHandleRead: end of reply found"); |
6bf4f823 | 1003 | |
1004 | if (t > srv->rbuf && t[-1] == '\r') | |
1005 | t[-1] = '\0'; | |
1006 | ||
62e76326 | 1007 | *t = '\0'; |
1008 | ||
2734fd37 | 1009 | if (r && cbdataReferenceValid(r->data)) { |
dcb802aa | 1010 | r->callback(r->data, srv, srv->rbuf); |
62e76326 | 1011 | } else { |
bf8fe701 | 1012 | debugs(84, 1, "StatefulHandleRead: no callback data registered"); |
e1381638 | 1013 | called = 0; |
62e76326 | 1014 | } |
1015 | ||
1016 | srv->flags.busy = 0; | |
07eca7e0 | 1017 | srv->roffset = 0; |
62e76326 | 1018 | helperStatefulRequestFree(r); |
1019 | srv->request = NULL; | |
1020 | hlp->stats.replies++; | |
f9598528 | 1021 | srv->answer_time = current_time; |
62e76326 | 1022 | hlp->stats.avg_svc_time = |
1023 | intAverage(hlp->stats.avg_svc_time, | |
1024 | tvSubMsec(srv->dispatch_time, current_time), | |
1025 | hlp->stats.replies, REDIRECT_AV_FACTOR); | |
1026 | ||
e1381638 AJ |
1027 | if (called) |
1028 | helperStatefulServerDone(srv); | |
1029 | else | |
1030 | helperStatefulReleaseServer(srv); | |
94439e4e | 1031 | } |
07eca7e0 | 1032 | |
420e3e30 HN |
1033 | if (srv->rfd != -1) |
1034 | comm_read(srv->rfd, srv->rbuf + srv->roffset, srv->rbuf_sz - srv->roffset - 1, | |
e1381638 | 1035 | helperStatefulHandleRead, srv); |
94439e4e | 1036 | } |
1037 | ||
74addf6c | 1038 | static void |
1039 | Enqueue(helper * hlp, helper_request * r) | |
1040 | { | |
e6ccf245 | 1041 | dlink_node *link = (dlink_node *)memAllocate(MEM_DLINK_NODE); |
74addf6c | 1042 | dlinkAddTail(r, link, &hlp->queue); |
1043 | hlp->stats.queue_size++; | |
62e76326 | 1044 | |
74addf6c | 1045 | if (hlp->stats.queue_size < hlp->n_running) |
62e76326 | 1046 | return; |
1047 | ||
74addf6c | 1048 | if (squid_curtime - hlp->last_queue_warn < 600) |
62e76326 | 1049 | return; |
1050 | ||
fe73896c | 1051 | if (shutting_down || reconfiguring) |
62e76326 | 1052 | return; |
1053 | ||
74addf6c | 1054 | hlp->last_queue_warn = squid_curtime; |
62e76326 | 1055 | |
bf8fe701 | 1056 | debugs(84, 0, "WARNING: All " << hlp->id_name << " processes are busy."); |
1057 | debugs(84, 0, "WARNING: " << hlp->stats.queue_size << " pending requests queued"); | |
62e76326 | 1058 | |
62e76326 | 1059 | |
74addf6c | 1060 | if (hlp->stats.queue_size > hlp->n_running * 2) |
62e76326 | 1061 | fatalf("Too many queued %s requests", hlp->id_name); |
1062 | ||
bf8fe701 | 1063 | debugs(84, 1, "Consider increasing the number of " << hlp->id_name << " processes in your config file."); |
1064 | ||
74addf6c | 1065 | } |
1066 | ||
94439e4e | 1067 | static void |
1068 | StatefulEnqueue(statefulhelper * hlp, helper_stateful_request * r) | |
1069 | { | |
e6ccf245 | 1070 | dlink_node *link = (dlink_node *)memAllocate(MEM_DLINK_NODE); |
94439e4e | 1071 | dlinkAddTail(r, link, &hlp->queue); |
1072 | hlp->stats.queue_size++; | |
62e76326 | 1073 | |
94439e4e | 1074 | if (hlp->stats.queue_size < hlp->n_running) |
62e76326 | 1075 | return; |
1076 | ||
893cbac6 | 1077 | if (hlp->stats.queue_size > hlp->n_running * 2) |
62e76326 | 1078 | fatalf("Too many queued %s requests", hlp->id_name); |
1079 | ||
94439e4e | 1080 | if (squid_curtime - hlp->last_queue_warn < 600) |
62e76326 | 1081 | return; |
1082 | ||
94439e4e | 1083 | if (shutting_down || reconfiguring) |
62e76326 | 1084 | return; |
1085 | ||
94439e4e | 1086 | hlp->last_queue_warn = squid_curtime; |
62e76326 | 1087 | |
bf8fe701 | 1088 | debugs(84, 0, "WARNING: All " << hlp->id_name << " processes are busy."); |
62e76326 | 1089 | |
bf8fe701 | 1090 | debugs(84, 0, "WARNING: " << hlp->stats.queue_size << " pending requests queued"); |
1091 | debugs(84, 1, "Consider increasing the number of " << hlp->id_name << " processes in your config file."); | |
62e76326 | 1092 | |
94439e4e | 1093 | } |
1094 | ||
74addf6c | 1095 | static helper_request * |
1096 | Dequeue(helper * hlp) | |
1097 | { | |
1098 | dlink_node *link; | |
1099 | helper_request *r = NULL; | |
62e76326 | 1100 | |
74addf6c | 1101 | if ((link = hlp->queue.head)) { |
62e76326 | 1102 | r = (helper_request *)link->data; |
1103 | dlinkDelete(link, &hlp->queue); | |
1104 | memFree(link, MEM_DLINK_NODE); | |
1105 | hlp->stats.queue_size--; | |
74addf6c | 1106 | } |
62e76326 | 1107 | |
74addf6c | 1108 | return r; |
1109 | } | |
1110 | ||
94439e4e | 1111 | static helper_stateful_request * |
1112 | StatefulDequeue(statefulhelper * hlp) | |
1113 | { | |
1114 | dlink_node *link; | |
1115 | helper_stateful_request *r = NULL; | |
62e76326 | 1116 | |
94439e4e | 1117 | if ((link = hlp->queue.head)) { |
62e76326 | 1118 | r = (helper_stateful_request *)link->data; |
1119 | dlinkDelete(link, &hlp->queue); | |
1120 | memFree(link, MEM_DLINK_NODE); | |
1121 | hlp->stats.queue_size--; | |
94439e4e | 1122 | } |
62e76326 | 1123 | |
94439e4e | 1124 | return r; |
1125 | } | |
1126 | ||
74addf6c | 1127 | static helper_server * |
1128 | GetFirstAvailable(helper * hlp) | |
1129 | { | |
1130 | dlink_node *n; | |
07eca7e0 | 1131 | helper_server *srv; |
1132 | helper_server *selected = NULL; | |
62e76326 | 1133 | |
fe73896c | 1134 | if (hlp->n_running == 0) |
62e76326 | 1135 | return NULL; |
1136 | ||
07eca7e0 | 1137 | /* Find "least" loaded helper (approx) */ |
74addf6c | 1138 | for (n = hlp->servers.head; n != NULL; n = n->next) { |
62e76326 | 1139 | srv = (helper_server *)n->data; |
1140 | ||
07eca7e0 | 1141 | if (selected && selected->stats.pending <= srv->stats.pending) |
62e76326 | 1142 | continue; |
1143 | ||
d8f10d6a | 1144 | if (srv->flags.shutdown) |
62e76326 | 1145 | continue; |
1146 | ||
07eca7e0 | 1147 | if (!srv->stats.pending) |
1148 | return srv; | |
1149 | ||
1150 | if (selected) { | |
1151 | selected = srv; | |
1152 | break; | |
1153 | } | |
1154 | ||
1155 | selected = srv; | |
74addf6c | 1156 | } |
62e76326 | 1157 | |
07eca7e0 | 1158 | /* Check for overload */ |
1159 | if (!selected) | |
1160 | return NULL; | |
1161 | ||
1162 | if (selected->stats.pending >= (hlp->concurrency ? hlp->concurrency : 1)) | |
1163 | return NULL; | |
1164 | ||
1165 | return selected; | |
74addf6c | 1166 | } |
1167 | ||
94439e4e | 1168 | static helper_stateful_server * |
1169 | StatefulGetFirstAvailable(statefulhelper * hlp) | |
1170 | { | |
1171 | dlink_node *n; | |
1172 | helper_stateful_server *srv = NULL; | |
4f0ef8e8 | 1173 | debugs(84, 5, "StatefulGetFirstAvailable: Running servers " << hlp->n_running); |
62e76326 | 1174 | |
94439e4e | 1175 | if (hlp->n_running == 0) |
62e76326 | 1176 | return NULL; |
1177 | ||
94439e4e | 1178 | for (n = hlp->servers.head; n != NULL; n = n->next) { |
62e76326 | 1179 | srv = (helper_stateful_server *)n->data; |
1180 | ||
1181 | if (srv->flags.busy) | |
1182 | continue; | |
1183 | ||
360d26ea | 1184 | if (srv->flags.reserved) |
62e76326 | 1185 | continue; |
1186 | ||
d8f10d6a | 1187 | if (srv->flags.shutdown) |
62e76326 | 1188 | continue; |
1189 | ||
1190 | if ((hlp->IsAvailable != NULL) && (srv->data != NULL) && !(hlp->IsAvailable(srv->data))) | |
1191 | continue; | |
1192 | ||
26ac0430 | 1193 | debugs(84, 5, "StatefulGetFirstAvailable: returning srv-" << srv->index); |
62e76326 | 1194 | return srv; |
94439e4e | 1195 | } |
62e76326 | 1196 | |
bf8fe701 | 1197 | debugs(84, 5, "StatefulGetFirstAvailable: None available."); |
94439e4e | 1198 | return NULL; |
1199 | } | |
1200 | ||
1201 | ||
42679bd6 | 1202 | static void |
1203 | helperDispatchWriteDone(int fd, char *buf, size_t len, comm_err_t flag, int xerrno, void *data) | |
1204 | { | |
07eca7e0 | 1205 | helper_server *srv = (helper_server *)data; |
1206 | ||
2fe7eff9 | 1207 | srv->writebuf->clean(); |
032785bf | 1208 | delete srv->writebuf; |
1209 | srv->writebuf = NULL; | |
07eca7e0 | 1210 | srv->flags.writing = 0; |
1211 | ||
1212 | if (flag != COMM_OK) { | |
1213 | /* Helper server has crashed */ | |
bf8fe701 | 1214 | debugs(84, 0, "helperDispatch: Helper " << srv->parent->id_name << " #" << srv->index + 1 << " has crashed"); |
07eca7e0 | 1215 | return; |
1216 | } | |
1217 | ||
2fe7eff9 | 1218 | if (!srv->wqueue->isNull()) { |
07eca7e0 | 1219 | srv->writebuf = srv->wqueue; |
032785bf | 1220 | srv->wqueue = new MemBuf; |
07eca7e0 | 1221 | srv->flags.writing = 1; |
1222 | comm_write(srv->wfd, | |
032785bf | 1223 | srv->writebuf->content(), |
1224 | srv->writebuf->contentSize(), | |
07eca7e0 | 1225 | helperDispatchWriteDone, /* Handler */ |
2b663917 | 1226 | srv, NULL); /* Handler-data, freefunc */ |
07eca7e0 | 1227 | } |
42679bd6 | 1228 | } |
1229 | ||
74addf6c | 1230 | static void |
1231 | helperDispatch(helper_server * srv, helper_request * r) | |
1232 | { | |
1233 | helper *hlp = srv->parent; | |
07eca7e0 | 1234 | helper_request **ptr = NULL; |
1235 | unsigned int slot; | |
62e76326 | 1236 | |
fa80a8ef | 1237 | if (!cbdataReferenceValid(r->data)) { |
bf8fe701 | 1238 | debugs(84, 1, "helperDispatch: invalid callback data"); |
62e76326 | 1239 | helperRequestFree(r); |
1240 | return; | |
74addf6c | 1241 | } |
62e76326 | 1242 | |
07eca7e0 | 1243 | for (slot = 0; slot < (hlp->concurrency ? hlp->concurrency : 1); slot++) { |
1244 | if (!srv->requests[slot]) { | |
1245 | ptr = &srv->requests[slot]; | |
1246 | break; | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | assert(ptr); | |
1251 | *ptr = r; | |
1252 | srv->stats.pending += 1; | |
1253 | r->dispatch_time = current_time; | |
1254 | ||
2fe7eff9 | 1255 | if (srv->wqueue->isNull()) |
1256 | srv->wqueue->init(); | |
07eca7e0 | 1257 | |
1258 | if (hlp->concurrency) | |
2fe7eff9 | 1259 | srv->wqueue->Printf("%d %s", slot, r->buf); |
07eca7e0 | 1260 | else |
2fe7eff9 | 1261 | srv->wqueue->append(r->buf, strlen(r->buf)); |
07eca7e0 | 1262 | |
1263 | if (!srv->flags.writing) { | |
032785bf | 1264 | assert(NULL == srv->writebuf); |
07eca7e0 | 1265 | srv->writebuf = srv->wqueue; |
032785bf | 1266 | srv->wqueue = new MemBuf; |
07eca7e0 | 1267 | srv->flags.writing = 1; |
1268 | comm_write(srv->wfd, | |
032785bf | 1269 | srv->writebuf->content(), |
1270 | srv->writebuf->contentSize(), | |
07eca7e0 | 1271 | helperDispatchWriteDone, /* Handler */ |
2b663917 | 1272 | srv, NULL); /* Handler-data, free func */ |
07eca7e0 | 1273 | } |
1274 | ||
4a7a3d56 | 1275 | debugs(84, 5, "helperDispatch: Request sent to " << hlp->id_name << " #" << srv->index + 1 << ", " << strlen(r->buf) << " bytes"); |
bf8fe701 | 1276 | |
74addf6c | 1277 | srv->stats.uses++; |
1278 | hlp->stats.requests++; | |
1279 | } | |
1280 | ||
42679bd6 | 1281 | static void |
1282 | helperStatefulDispatchWriteDone(int fd, char *buf, size_t len, comm_err_t flag, | |
62e76326 | 1283 | int xerrno, void *data) |
42679bd6 | 1284 | { |
62e76326 | 1285 | /* nothing! */ |
42679bd6 | 1286 | } |
1287 | ||
1288 | ||
94439e4e | 1289 | static void |
1290 | helperStatefulDispatch(helper_stateful_server * srv, helper_stateful_request * r) | |
1291 | { | |
1292 | statefulhelper *hlp = srv->parent; | |
62e76326 | 1293 | |
fa80a8ef | 1294 | if (!cbdataReferenceValid(r->data)) { |
bf8fe701 | 1295 | debugs(84, 1, "helperStatefulDispatch: invalid callback data"); |
62e76326 | 1296 | helperStatefulRequestFree(r); |
e1381638 | 1297 | helperStatefulReleaseServer(srv); |
62e76326 | 1298 | return; |
94439e4e | 1299 | } |
62e76326 | 1300 | |
bf8fe701 | 1301 | debugs(84, 9, "helperStatefulDispatch busying helper " << hlp->id_name << " #" << srv->index + 1); |
62e76326 | 1302 | |
94439e4e | 1303 | if (r->placeholder == 1) { |
62e76326 | 1304 | /* a callback is needed before this request can _use_ a helper. */ |
d20ce97d | 1305 | /* we don't care about releasing this helper. The request NEVER |
62e76326 | 1306 | * gets to the helper. So we throw away the return code */ |
1307 | r->callback(r->data, srv, NULL); | |
1308 | /* throw away the placeholder */ | |
1309 | helperStatefulRequestFree(r); | |
1310 | /* and push the queue. Note that the callback may have submitted a new | |
1311 | * request to the helper which is why we test for the request*/ | |
1312 | ||
420e3e30 | 1313 | if (srv->request == NULL) |
a8c4f8d6 | 1314 | helperStatefulServerDone(srv); |
62e76326 | 1315 | |
1316 | return; | |
94439e4e | 1317 | } |
62e76326 | 1318 | |
94439e4e | 1319 | srv->flags.busy = 1; |
dcb802aa | 1320 | srv->flags.reserved = 1; |
94439e4e | 1321 | srv->request = r; |
1322 | srv->dispatch_time = current_time; | |
42679bd6 | 1323 | comm_write(srv->wfd, |
62e76326 | 1324 | r->buf, |
1325 | strlen(r->buf), | |
1326 | helperStatefulDispatchWriteDone, /* Handler */ | |
2b663917 | 1327 | hlp, NULL); /* Handler-data, free func */ |
bf8fe701 | 1328 | debugs(84, 5, "helperStatefulDispatch: Request sent to " << |
1329 | hlp->id_name << " #" << srv->index + 1 << ", " << | |
1330 | (int) strlen(r->buf) << " bytes"); | |
1331 | ||
94439e4e | 1332 | srv->stats.uses++; |
1333 | hlp->stats.requests++; | |
1334 | } | |
1335 | ||
1336 | ||
74addf6c | 1337 | static void |
1338 | helperKickQueue(helper * hlp) | |
1339 | { | |
1340 | helper_request *r; | |
1341 | helper_server *srv; | |
62e76326 | 1342 | |
74addf6c | 1343 | while ((srv = GetFirstAvailable(hlp)) && (r = Dequeue(hlp))) |
62e76326 | 1344 | helperDispatch(srv, r); |
74addf6c | 1345 | } |
1346 | ||
94439e4e | 1347 | static void |
1348 | helperStatefulKickQueue(statefulhelper * hlp) | |
1349 | { | |
1350 | helper_stateful_request *r; | |
1351 | helper_stateful_server *srv; | |
62e76326 | 1352 | |
94439e4e | 1353 | while ((srv = StatefulGetFirstAvailable(hlp)) && (r = StatefulDequeue(hlp))) |
62e76326 | 1354 | helperStatefulDispatch(srv, r); |
94439e4e | 1355 | } |
1356 | ||
1357 | static void | |
a8c4f8d6 | 1358 | helperStatefulServerDone(helper_stateful_server * srv) |
94439e4e | 1359 | { |
420e3e30 HN |
1360 | if (!srv->flags.shutdown) { |
1361 | helperStatefulKickQueue(srv->parent); | |
a8db3389 | 1362 | } else if (!srv->flags.closing && !srv->flags.reserved && !srv->flags.busy) { |
420e3e30 HN |
1363 | int wfd = srv->wfd; |
1364 | srv->wfd = -1; | |
1365 | if (srv->rfd == wfd) | |
1366 | srv->rfd = -1; | |
1367 | srv->flags.closing=1; | |
1368 | comm_close(wfd); | |
1369 | return; | |
1370 | } | |
94439e4e | 1371 | } |
1372 | ||
74addf6c | 1373 | static void |
1374 | helperRequestFree(helper_request * r) | |
1375 | { | |
fa80a8ef | 1376 | cbdataReferenceDone(r->data); |
74addf6c | 1377 | xfree(r->buf); |
00d77d6b | 1378 | delete r; |
51ee7c82 | 1379 | } |
1380 | ||
94439e4e | 1381 | static void |
1382 | helperStatefulRequestFree(helper_stateful_request * r) | |
1383 | { | |
26ac0430 | 1384 | if (r) { |
b1da7838 | 1385 | cbdataReferenceDone(r->data); |
1386 | xfree(r->buf); | |
1387 | delete r; | |
1388 | } | |
51ee7c82 | 1389 | } |
9522b380 | 1390 | |
1391 | // TODO: should helper_ and helper_stateful_ have a common parent? | |
1392 | static bool | |
1393 | helperStartStats(StoreEntry *sentry, void *hlp, const char *label) | |
1394 | { | |
1395 | if (!hlp) { | |
1396 | if (label) | |
1397 | storeAppendPrintf(sentry, "%s: unavailable\n", label); | |
1398 | return false; | |
1399 | } | |
1400 | ||
1401 | if (label) | |
1402 | storeAppendPrintf(sentry, "%s:\n", label); | |
1403 | ||
1404 | return true; | |
1405 | } |