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cd748f27 | 1 | /* |
262a0e14 | 2 | * $Id$ |
cd748f27 | 3 | * |
4 | * DEBUG: section 43 AIOPS | |
5 | * AUTHOR: Stewart Forster <slf@connect.com.au> | |
6 | * | |
2b6662ba | 7 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
cd748f27 | 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. | |
cd748f27 | 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 | * |
cd748f27 | 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 | * |
cd748f27 | 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 | ||
e4116bdb | 35 | #ifndef _REENTRANT |
36 | #error "_REENTRANT MUST be defined to build squid async io support." | |
37 | #endif | |
38 | ||
cd748f27 | 39 | #include "squid.h" |
b9ae18aa | 40 | #include "DiskThreads.h" |
cd748f27 | 41 | |
42 | #include <stdio.h> | |
cd748f27 | 43 | #include <sys/stat.h> |
44 | #include <fcntl.h> | |
45 | #include <pthread.h> | |
46 | #include <errno.h> | |
47 | #include <dirent.h> | |
48 | #include <signal.h> | |
49 | #if HAVE_SCHED_H | |
50 | #include <sched.h> | |
51 | #endif | |
56410c89 | 52 | #include "CommIO.h" |
985c86bc | 53 | #include "SquidTime.h" |
a553a5a3 | 54 | #include "Store.h" |
cd748f27 | 55 | |
56 | #define RIDICULOUS_LENGTH 4096 | |
57 | ||
c04d4f40 | 58 | enum _squidaio_thread_status { |
cd748f27 | 59 | _THREAD_STARTING = 0, |
60 | _THREAD_WAITING, | |
61 | _THREAD_BUSY, | |
62 | _THREAD_FAILED, | |
63 | _THREAD_DONE | |
64 | }; | |
c04d4f40 | 65 | typedef enum _squidaio_thread_status squidaio_thread_status; |
cd748f27 | 66 | |
26ac0430 | 67 | typedef struct squidaio_request_t { |
62e76326 | 68 | |
c04d4f40 | 69 | struct squidaio_request_t *next; |
70 | squidaio_request_type request_type; | |
cd748f27 | 71 | int cancelled; |
72 | char *path; | |
73 | int oflag; | |
74 | mode_t mode; | |
75 | int fd; | |
76 | char *bufferp; | |
ee139403 | 77 | size_t buflen; |
cd748f27 | 78 | off_t offset; |
79 | int whence; | |
80 | int ret; | |
81 | int err; | |
62e76326 | 82 | |
cd748f27 | 83 | struct stat *tmpstatp; |
62e76326 | 84 | |
cd748f27 | 85 | struct stat *statp; |
c04d4f40 | 86 | squidaio_result_t *resultp; |
2fadd50d | 87 | } squidaio_request_t; |
cd748f27 | 88 | |
26ac0430 | 89 | typedef struct squidaio_request_queue_t { |
55f0e6f7 | 90 | pthread_mutex_t mutex; |
91 | pthread_cond_t cond; | |
c04d4f40 | 92 | squidaio_request_t *volatile head; |
93 | squidaio_request_t *volatile *volatile tailp; | |
55f0e6f7 | 94 | unsigned long requests; |
f0debecb | 95 | unsigned long blocked; /* main failed to lock the queue */ |
2fadd50d | 96 | } squidaio_request_queue_t; |
55f0e6f7 | 97 | |
c04d4f40 | 98 | typedef struct squidaio_thread_t squidaio_thread_t; |
62e76326 | 99 | |
26ac0430 | 100 | struct squidaio_thread_t { |
c04d4f40 | 101 | squidaio_thread_t *next; |
cd748f27 | 102 | pthread_t thread; |
c04d4f40 | 103 | squidaio_thread_status status; |
62e76326 | 104 | |
c04d4f40 | 105 | struct squidaio_request_t *current_req; |
55f0e6f7 | 106 | unsigned long requests; |
107 | }; | |
cd748f27 | 108 | |
c04d4f40 | 109 | static void squidaio_queue_request(squidaio_request_t *); |
110 | static void squidaio_cleanup_request(squidaio_request_t *); | |
59a09b98 | 111 | SQUIDCEXTERN void *squidaio_thread_loop(void *); |
c04d4f40 | 112 | static void squidaio_do_open(squidaio_request_t *); |
113 | static void squidaio_do_read(squidaio_request_t *); | |
114 | static void squidaio_do_write(squidaio_request_t *); | |
115 | static void squidaio_do_close(squidaio_request_t *); | |
116 | static void squidaio_do_stat(squidaio_request_t *); | |
efa3acd1 | 117 | static void squidaio_do_unlink(squidaio_request_t *); |
cd748f27 | 118 | #if AIO_OPENDIR |
c04d4f40 | 119 | static void *squidaio_do_opendir(squidaio_request_t *); |
cd748f27 | 120 | #endif |
c04d4f40 | 121 | static void squidaio_debug(squidaio_request_t *); |
122 | static void squidaio_poll_queues(void); | |
cd748f27 | 123 | |
c04d4f40 | 124 | static squidaio_thread_t *threads = NULL; |
125 | static int squidaio_initialised = 0; | |
cd748f27 | 126 | |
55f0e6f7 | 127 | |
58cd5bbd | 128 | #define AIO_LARGE_BUFS 16384 |
129 | #define AIO_MEDIUM_BUFS AIO_LARGE_BUFS >> 1 | |
130 | #define AIO_SMALL_BUFS AIO_LARGE_BUFS >> 2 | |
131 | #define AIO_TINY_BUFS AIO_LARGE_BUFS >> 3 | |
55f0e6f7 | 132 | #define AIO_MICRO_BUFS 128 |
58cd5bbd | 133 | |
a3efa961 | 134 | static MemAllocator *squidaio_large_bufs = NULL; /* 16K */ |
135 | static MemAllocator *squidaio_medium_bufs = NULL; /* 8K */ | |
136 | static MemAllocator *squidaio_small_bufs = NULL; /* 4K */ | |
137 | static MemAllocator *squidaio_tiny_bufs = NULL; /* 2K */ | |
138 | static MemAllocator *squidaio_micro_bufs = NULL; /* 128K */ | |
58cd5bbd | 139 | |
cd748f27 | 140 | static int request_queue_len = 0; |
a3efa961 | 141 | static MemAllocator *squidaio_request_pool = NULL; |
142 | static MemAllocator *squidaio_thread_pool = NULL; | |
c04d4f40 | 143 | static squidaio_request_queue_t request_queue; |
62e76326 | 144 | |
26ac0430 | 145 | static struct { |
c04d4f40 | 146 | squidaio_request_t *head, **tailp; |
62e76326 | 147 | } |
f0debecb | 148 | |
62e76326 | 149 | request_queue2 = { |
150 | ||
26ac0430 AJ |
151 | NULL, &request_queue2.head |
152 | }; | |
c04d4f40 | 153 | static squidaio_request_queue_t done_queue; |
62e76326 | 154 | |
26ac0430 | 155 | static struct { |
c04d4f40 | 156 | squidaio_request_t *head, **tailp; |
62e76326 | 157 | } |
f0debecb | 158 | |
62e76326 | 159 | done_requests = { |
160 | ||
26ac0430 AJ |
161 | NULL, &done_requests.head |
162 | }; | |
cd748f27 | 163 | static pthread_attr_t globattr; |
5e5c622b | 164 | #if HAVE_SCHED_H |
62e76326 | 165 | |
cd748f27 | 166 | static struct sched_param globsched; |
5e5c622b | 167 | #endif |
cd748f27 | 168 | static pthread_t main_thread; |
169 | ||
a3efa961 | 170 | static MemAllocator * |
c04d4f40 | 171 | squidaio_get_pool(int size) |
58cd5bbd | 172 | { |
58cd5bbd | 173 | if (size <= AIO_LARGE_BUFS) { |
62e76326 | 174 | if (size <= AIO_MICRO_BUFS) |
a3efa961 | 175 | return squidaio_micro_bufs; |
62e76326 | 176 | else if (size <= AIO_TINY_BUFS) |
a3efa961 | 177 | return squidaio_tiny_bufs; |
62e76326 | 178 | else if (size <= AIO_SMALL_BUFS) |
a3efa961 | 179 | return squidaio_small_bufs; |
62e76326 | 180 | else if (size <= AIO_MEDIUM_BUFS) |
a3efa961 | 181 | return squidaio_medium_bufs; |
62e76326 | 182 | else |
a3efa961 | 183 | return squidaio_large_bufs; |
184 | } | |
62e76326 | 185 | |
a3efa961 | 186 | return NULL; |
58cd5bbd | 187 | } |
188 | ||
211f1d0b | 189 | void * |
c04d4f40 | 190 | squidaio_xmalloc(int size) |
58cd5bbd | 191 | { |
192 | void *p; | |
a3efa961 | 193 | MemAllocator *pool; |
58cd5bbd | 194 | |
c04d4f40 | 195 | if ((pool = squidaio_get_pool(size)) != NULL) { |
b001e822 | 196 | p = pool->alloc(); |
58cd5bbd | 197 | } else |
62e76326 | 198 | p = xmalloc(size); |
58cd5bbd | 199 | |
200 | return p; | |
201 | } | |
202 | ||
55f0e6f7 | 203 | static char * |
c04d4f40 | 204 | squidaio_xstrdup(const char *str) |
55f0e6f7 | 205 | { |
206 | char *p; | |
f0debecb | 207 | int len = strlen(str) + 1; |
55f0e6f7 | 208 | |
e6ccf245 | 209 | p = (char *)squidaio_xmalloc(len); |
55f0e6f7 | 210 | strncpy(p, str, len); |
211 | ||
212 | return p; | |
213 | } | |
214 | ||
211f1d0b | 215 | void |
c04d4f40 | 216 | squidaio_xfree(void *p, int size) |
58cd5bbd | 217 | { |
a3efa961 | 218 | MemAllocator *pool; |
58cd5bbd | 219 | |
c04d4f40 | 220 | if ((pool = squidaio_get_pool(size)) != NULL) { |
dc47f531 | 221 | pool->freeOne(p); |
58cd5bbd | 222 | } else |
62e76326 | 223 | xfree(p); |
58cd5bbd | 224 | } |
225 | ||
55f0e6f7 | 226 | static void |
c04d4f40 | 227 | squidaio_xstrfree(char *str) |
55f0e6f7 | 228 | { |
a3efa961 | 229 | MemAllocator *pool; |
f0debecb | 230 | int len = strlen(str) + 1; |
55f0e6f7 | 231 | |
c04d4f40 | 232 | if ((pool = squidaio_get_pool(len)) != NULL) { |
dc47f531 | 233 | pool->freeOne(str); |
55f0e6f7 | 234 | } else |
62e76326 | 235 | xfree(str); |
55f0e6f7 | 236 | } |
237 | ||
d06925a4 | 238 | void |
c04d4f40 | 239 | squidaio_init(void) |
cd748f27 | 240 | { |
241 | int i; | |
c04d4f40 | 242 | squidaio_thread_t *threadp; |
cd748f27 | 243 | |
c04d4f40 | 244 | if (squidaio_initialised) |
62e76326 | 245 | return; |
cd748f27 | 246 | |
247 | pthread_attr_init(&globattr); | |
62e76326 | 248 | |
cd748f27 | 249 | #if HAVE_PTHREAD_ATTR_SETSCOPE |
62e76326 | 250 | |
cd748f27 | 251 | pthread_attr_setscope(&globattr, PTHREAD_SCOPE_SYSTEM); |
62e76326 | 252 | |
cd748f27 | 253 | #endif |
5e5c622b | 254 | #if HAVE_SCHED_H |
62e76326 | 255 | |
cd748f27 | 256 | globsched.sched_priority = 1; |
62e76326 | 257 | |
5e5c622b | 258 | #endif |
62e76326 | 259 | |
cd748f27 | 260 | main_thread = pthread_self(); |
62e76326 | 261 | |
5e5c622b | 262 | #if HAVE_SCHED_H && HAVE_PTHREAD_SETSCHEDPARAM |
62e76326 | 263 | |
cd748f27 | 264 | pthread_setschedparam(main_thread, SCHED_OTHER, &globsched); |
62e76326 | 265 | |
cd748f27 | 266 | #endif |
5e5c622b | 267 | #if HAVE_SCHED_H |
62e76326 | 268 | |
cd748f27 | 269 | globsched.sched_priority = 2; |
62e76326 | 270 | |
5e5c622b | 271 | #endif |
272 | #if HAVE_SCHED_H && HAVE_PTHREAD_ATTR_SETSCHEDPARAM | |
62e76326 | 273 | |
cd748f27 | 274 | pthread_attr_setschedparam(&globattr, &globsched); |
62e76326 | 275 | |
cd748f27 | 276 | #endif |
277 | ||
5a3501d2 | 278 | /* Give each thread a smaller 256KB stack, should be more than sufficient */ |
279 | pthread_attr_setstacksize(&globattr, 256 * 1024); | |
280 | ||
55f0e6f7 | 281 | /* Initialize request queue */ |
282 | if (pthread_mutex_init(&(request_queue.mutex), NULL)) | |
62e76326 | 283 | fatal("Failed to create mutex"); |
284 | ||
55f0e6f7 | 285 | if (pthread_cond_init(&(request_queue.cond), NULL)) |
62e76326 | 286 | fatal("Failed to create condition variable"); |
287 | ||
55f0e6f7 | 288 | request_queue.head = NULL; |
62e76326 | 289 | |
55f0e6f7 | 290 | request_queue.tailp = &request_queue.head; |
62e76326 | 291 | |
55f0e6f7 | 292 | request_queue.requests = 0; |
62e76326 | 293 | |
55f0e6f7 | 294 | request_queue.blocked = 0; |
295 | ||
296 | /* Initialize done queue */ | |
297 | if (pthread_mutex_init(&(done_queue.mutex), NULL)) | |
62e76326 | 298 | fatal("Failed to create mutex"); |
299 | ||
55f0e6f7 | 300 | if (pthread_cond_init(&(done_queue.cond), NULL)) |
62e76326 | 301 | fatal("Failed to create condition variable"); |
302 | ||
55f0e6f7 | 303 | done_queue.head = NULL; |
62e76326 | 304 | |
55f0e6f7 | 305 | done_queue.tailp = &done_queue.head; |
62e76326 | 306 | |
55f0e6f7 | 307 | done_queue.requests = 0; |
62e76326 | 308 | |
55f0e6f7 | 309 | done_queue.blocked = 0; |
cd748f27 | 310 | |
55f0e6f7 | 311 | /* Create threads and get them to sit in their wait loop */ |
04eb0689 | 312 | squidaio_thread_pool = memPoolCreate("aio_thread", sizeof(squidaio_thread_t)); |
62e76326 | 313 | |
9fbbe256 | 314 | assert(NUMTHREADS); |
62e76326 | 315 | |
cd748f27 | 316 | for (i = 0; i < NUMTHREADS; i++) { |
b001e822 | 317 | threadp = (squidaio_thread_t *)squidaio_thread_pool->alloc(); |
62e76326 | 318 | threadp->status = _THREAD_STARTING; |
319 | threadp->current_req = NULL; | |
320 | threadp->requests = 0; | |
321 | threadp->next = threads; | |
322 | threads = threadp; | |
323 | ||
324 | if (pthread_create(&threadp->thread, &globattr, squidaio_thread_loop, threadp)) { | |
325 | fprintf(stderr, "Thread creation failed\n"); | |
326 | threadp->status = _THREAD_FAILED; | |
327 | continue; | |
328 | } | |
cd748f27 | 329 | } |
330 | ||
331 | /* Create request pool */ | |
04eb0689 | 332 | squidaio_request_pool = memPoolCreate("aio_request", sizeof(squidaio_request_t)); |
62e76326 | 333 | |
04eb0689 | 334 | squidaio_large_bufs = memPoolCreate("squidaio_large_bufs", AIO_LARGE_BUFS); |
62e76326 | 335 | |
04eb0689 | 336 | squidaio_medium_bufs = memPoolCreate("squidaio_medium_bufs", AIO_MEDIUM_BUFS); |
62e76326 | 337 | |
04eb0689 | 338 | squidaio_small_bufs = memPoolCreate("squidaio_small_bufs", AIO_SMALL_BUFS); |
62e76326 | 339 | |
04eb0689 | 340 | squidaio_tiny_bufs = memPoolCreate("squidaio_tiny_bufs", AIO_TINY_BUFS); |
62e76326 | 341 | |
04eb0689 | 342 | squidaio_micro_bufs = memPoolCreate("squidaio_micro_bufs", AIO_MICRO_BUFS); |
c04d4f40 | 343 | |
344 | squidaio_initialised = 1; | |
cd748f27 | 345 | } |
346 | ||
d06925a4 | 347 | void |
348 | squidaio_shutdown(void) | |
349 | { | |
350 | if (!squidaio_initialised) | |
351 | return; | |
352 | ||
353 | /* This is the same as in squidaio_sync */ | |
354 | do { | |
355 | squidaio_poll_queues(); | |
356 | } while (request_queue_len > 0); | |
357 | ||
358 | CommIO::NotifyIOClose(); | |
359 | ||
360 | squidaio_initialised = 0; | |
361 | } | |
cd748f27 | 362 | |
59a09b98 | 363 | void * |
c04d4f40 | 364 | squidaio_thread_loop(void *ptr) |
cd748f27 | 365 | { |
e6ccf245 | 366 | squidaio_thread_t *threadp = (squidaio_thread_t *)ptr; |
c04d4f40 | 367 | squidaio_request_t *request; |
e6ccf245 | 368 | sigset_t newSig; |
cd748f27 | 369 | |
370 | /* | |
371 | * Make sure to ignore signals which may possibly get sent to | |
372 | * the parent squid thread. Causes havoc with mutex's and | |
373 | * condition waits otherwise | |
374 | */ | |
375 | ||
e6ccf245 | 376 | sigemptyset(&newSig); |
377 | sigaddset(&newSig, SIGPIPE); | |
378 | sigaddset(&newSig, SIGCHLD); | |
cd748f27 | 379 | #ifdef _SQUID_LINUX_THREADS_ |
62e76326 | 380 | |
e6ccf245 | 381 | sigaddset(&newSig, SIGQUIT); |
382 | sigaddset(&newSig, SIGTRAP); | |
cd748f27 | 383 | #else |
62e76326 | 384 | |
e6ccf245 | 385 | sigaddset(&newSig, SIGUSR1); |
386 | sigaddset(&newSig, SIGUSR2); | |
cd748f27 | 387 | #endif |
62e76326 | 388 | |
e6ccf245 | 389 | sigaddset(&newSig, SIGHUP); |
390 | sigaddset(&newSig, SIGTERM); | |
391 | sigaddset(&newSig, SIGINT); | |
392 | sigaddset(&newSig, SIGALRM); | |
393 | pthread_sigmask(SIG_BLOCK, &newSig, NULL); | |
cd748f27 | 394 | |
cd748f27 | 395 | while (1) { |
62e76326 | 396 | threadp->current_req = request = NULL; |
397 | request = NULL; | |
398 | /* Get a request to process */ | |
399 | threadp->status = _THREAD_WAITING; | |
400 | pthread_mutex_lock(&request_queue.mutex); | |
401 | ||
402 | while (!request_queue.head) { | |
403 | pthread_cond_wait(&request_queue.cond, &request_queue.mutex); | |
404 | } | |
405 | ||
406 | request = request_queue.head; | |
407 | ||
408 | if (request) | |
409 | request_queue.head = request->next; | |
410 | ||
411 | if (!request_queue.head) | |
412 | request_queue.tailp = &request_queue.head; | |
413 | ||
414 | pthread_mutex_unlock(&request_queue.mutex); | |
415 | ||
416 | /* process the request */ | |
417 | threadp->status = _THREAD_BUSY; | |
418 | ||
419 | request->next = NULL; | |
420 | ||
421 | threadp->current_req = request; | |
422 | ||
423 | errno = 0; | |
424 | ||
425 | if (!request->cancelled) { | |
426 | switch (request->request_type) { | |
427 | ||
428 | case _AIO_OP_OPEN: | |
429 | squidaio_do_open(request); | |
430 | break; | |
431 | ||
432 | case _AIO_OP_READ: | |
433 | squidaio_do_read(request); | |
434 | break; | |
435 | ||
436 | case _AIO_OP_WRITE: | |
437 | squidaio_do_write(request); | |
438 | break; | |
439 | ||
440 | case _AIO_OP_CLOSE: | |
441 | squidaio_do_close(request); | |
442 | break; | |
443 | ||
efa3acd1 | 444 | case _AIO_OP_UNLINK: |
445 | squidaio_do_unlink(request); | |
446 | break; | |
447 | ||
cd748f27 | 448 | #if AIO_OPENDIR /* Opendir not implemented yet */ |
62e76326 | 449 | |
450 | case _AIO_OP_OPENDIR: | |
451 | squidaio_do_opendir(request); | |
452 | break; | |
cd748f27 | 453 | #endif |
62e76326 | 454 | |
455 | case _AIO_OP_STAT: | |
456 | squidaio_do_stat(request); | |
457 | break; | |
458 | ||
459 | default: | |
460 | request->ret = -1; | |
461 | request->err = EINVAL; | |
462 | break; | |
463 | } | |
464 | } else { /* cancelled */ | |
465 | request->ret = -1; | |
466 | request->err = EINTR; | |
467 | } | |
468 | ||
469 | threadp->status = _THREAD_DONE; | |
470 | /* put the request in the done queue */ | |
471 | pthread_mutex_lock(&done_queue.mutex); | |
472 | *done_queue.tailp = request; | |
473 | done_queue.tailp = &request->next; | |
474 | pthread_mutex_unlock(&done_queue.mutex); | |
475 | CommIO::NotifyIOCompleted(); | |
476 | threadp->requests++; | |
55f0e6f7 | 477 | } /* while forever */ |
62e76326 | 478 | |
cd748f27 | 479 | return NULL; |
c04d4f40 | 480 | } /* squidaio_thread_loop */ |
cd748f27 | 481 | |
482 | static void | |
c04d4f40 | 483 | squidaio_queue_request(squidaio_request_t * request) |
cd748f27 | 484 | { |
cd748f27 | 485 | static int high_start = 0; |
bf8fe701 | 486 | debugs(43, 9, "squidaio_queue_request: " << request << " type=" << request->request_type << " result=" << request->resultp); |
cd748f27 | 487 | /* Mark it as not executed (failing result, no error) */ |
55f0e6f7 | 488 | request->ret = -1; |
489 | request->err = 0; | |
490 | /* Internal housekeeping */ | |
491 | request_queue_len += 1; | |
492 | request->resultp->_data = request; | |
493 | /* Play some tricks with the request_queue2 queue */ | |
494 | request->next = NULL; | |
62e76326 | 495 | |
40173038 | 496 | if (pthread_mutex_trylock(&request_queue.mutex) == 0) { |
62e76326 | 497 | if (request_queue2.head) { |
498 | /* Grab blocked requests */ | |
499 | *request_queue.tailp = request_queue2.head; | |
500 | request_queue.tailp = request_queue2.tailp; | |
501 | } | |
502 | ||
503 | /* Enqueue request */ | |
504 | *request_queue.tailp = request; | |
505 | ||
506 | request_queue.tailp = &request->next; | |
507 | ||
508 | pthread_cond_signal(&request_queue.cond); | |
509 | ||
510 | pthread_mutex_unlock(&request_queue.mutex); | |
511 | ||
512 | if (request_queue2.head) { | |
513 | /* Clear queue of blocked requests */ | |
514 | request_queue2.head = NULL; | |
515 | request_queue2.tailp = &request_queue2.head; | |
516 | } | |
40173038 | 517 | } else { |
62e76326 | 518 | /* Oops, the request queue is blocked, use request_queue2 */ |
519 | *request_queue2.tailp = request; | |
520 | request_queue2.tailp = &request->next; | |
55f0e6f7 | 521 | } |
62e76326 | 522 | |
55f0e6f7 | 523 | if (request_queue2.head) { |
62e76326 | 524 | static int filter = 0; |
525 | static int filter_limit = 8; | |
526 | ||
527 | if (++filter >= filter_limit) { | |
528 | filter_limit += filter; | |
529 | filter = 0; | |
bf8fe701 | 530 | debugs(43, 1, "squidaio_queue_request: WARNING - Queue congestion"); |
62e76326 | 531 | } |
cd748f27 | 532 | } |
62e76326 | 533 | |
cd748f27 | 534 | /* Warn if out of threads */ |
55f0e6f7 | 535 | if (request_queue_len > MAGIC1) { |
62e76326 | 536 | static int last_warn = 0; |
537 | static int queue_high, queue_low; | |
538 | ||
539 | if (high_start == 0) { | |
540 | high_start = squid_curtime; | |
541 | queue_high = request_queue_len; | |
542 | queue_low = request_queue_len; | |
543 | } | |
544 | ||
545 | if (request_queue_len > queue_high) | |
546 | queue_high = request_queue_len; | |
547 | ||
548 | if (request_queue_len < queue_low) | |
549 | queue_low = request_queue_len; | |
550 | ||
551 | if (squid_curtime >= (last_warn + 15) && | |
552 | squid_curtime >= (high_start + 5)) { | |
bf8fe701 | 553 | debugs(43, 1, "squidaio_queue_request: WARNING - Disk I/O overloading"); |
62e76326 | 554 | |
555 | if (squid_curtime >= (high_start + 15)) | |
bf8fe701 | 556 | debugs(43, 1, "squidaio_queue_request: Queue Length: current=" << |
557 | request_queue_len << ", high=" << queue_high << | |
558 | ", low=" << queue_low << ", duration=" << | |
559 | (long int) (squid_curtime - high_start)); | |
62e76326 | 560 | |
561 | last_warn = squid_curtime; | |
562 | } | |
cd748f27 | 563 | } else { |
62e76326 | 564 | high_start = 0; |
cd748f27 | 565 | } |
62e76326 | 566 | |
55f0e6f7 | 567 | /* Warn if seriously overloaded */ |
cd748f27 | 568 | if (request_queue_len > RIDICULOUS_LENGTH) { |
bf8fe701 | 569 | debugs(43, 0, "squidaio_queue_request: Async request queue growing uncontrollably!"); |
570 | debugs(43, 0, "squidaio_queue_request: Syncing pending I/O operations.. (blocking)"); | |
62e76326 | 571 | squidaio_sync(); |
bf8fe701 | 572 | debugs(43, 0, "squidaio_queue_request: Synced"); |
cd748f27 | 573 | } |
c04d4f40 | 574 | } /* squidaio_queue_request */ |
cd748f27 | 575 | |
cd748f27 | 576 | static void |
c04d4f40 | 577 | squidaio_cleanup_request(squidaio_request_t * requestp) |
cd748f27 | 578 | { |
c04d4f40 | 579 | squidaio_result_t *resultp = requestp->resultp; |
cd748f27 | 580 | int cancelled = requestp->cancelled; |
581 | ||
582 | /* Free allocated structures and copy data back to user space if the */ | |
583 | /* request hasn't been cancelled */ | |
62e76326 | 584 | |
cd748f27 | 585 | switch (requestp->request_type) { |
62e76326 | 586 | |
cd748f27 | 587 | case _AIO_OP_STAT: |
62e76326 | 588 | |
589 | if (!cancelled && requestp->ret == 0) | |
590 | ||
591 | xmemcpy(requestp->statp, requestp->tmpstatp, sizeof(struct stat)); | |
592 | ||
593 | squidaio_xfree(requestp->tmpstatp, sizeof(struct stat)); | |
594 | ||
595 | squidaio_xstrfree(requestp->path); | |
596 | ||
597 | break; | |
598 | ||
cd748f27 | 599 | case _AIO_OP_OPEN: |
62e76326 | 600 | if (cancelled && requestp->ret >= 0) |
601 | /* The open() was cancelled but completed */ | |
602 | close(requestp->ret); | |
603 | ||
604 | squidaio_xstrfree(requestp->path); | |
605 | ||
606 | break; | |
607 | ||
cd748f27 | 608 | case _AIO_OP_CLOSE: |
62e76326 | 609 | if (cancelled && requestp->ret < 0) |
610 | /* The close() was cancelled and never got executed */ | |
611 | close(requestp->fd); | |
612 | ||
613 | break; | |
614 | ||
cd748f27 | 615 | case _AIO_OP_UNLINK: |
62e76326 | 616 | |
cd748f27 | 617 | case _AIO_OP_OPENDIR: |
62e76326 | 618 | squidaio_xstrfree(requestp->path); |
619 | ||
620 | break; | |
621 | ||
cd748f27 | 622 | case _AIO_OP_READ: |
62e76326 | 623 | break; |
624 | ||
cd748f27 | 625 | case _AIO_OP_WRITE: |
62e76326 | 626 | break; |
627 | ||
cd748f27 | 628 | default: |
62e76326 | 629 | break; |
cd748f27 | 630 | } |
62e76326 | 631 | |
cd748f27 | 632 | if (resultp != NULL && !cancelled) { |
62e76326 | 633 | resultp->aio_return = requestp->ret; |
634 | resultp->aio_errno = requestp->err; | |
cd748f27 | 635 | } |
62e76326 | 636 | |
dc47f531 | 637 | squidaio_request_pool->freeOne(requestp); |
c04d4f40 | 638 | } /* squidaio_cleanup_request */ |
cd748f27 | 639 | |
640 | ||
641 | int | |
c04d4f40 | 642 | squidaio_cancel(squidaio_result_t * resultp) |
cd748f27 | 643 | { |
e6ccf245 | 644 | squidaio_request_t *request = (squidaio_request_t *)resultp->_data; |
cd748f27 | 645 | |
55f0e6f7 | 646 | if (request && request->resultp == resultp) { |
bf8fe701 | 647 | debugs(43, 9, "squidaio_cancel: " << request << " type=" << request->request_type << " result=" << request->resultp); |
62e76326 | 648 | request->cancelled = 1; |
649 | request->resultp = NULL; | |
650 | resultp->_data = NULL; | |
651 | resultp->result_type = _AIO_OP_NONE; | |
652 | return 0; | |
55f0e6f7 | 653 | } |
62e76326 | 654 | |
cd748f27 | 655 | return 1; |
c04d4f40 | 656 | } /* squidaio_cancel */ |
cd748f27 | 657 | |
658 | ||
659 | int | |
c04d4f40 | 660 | squidaio_open(const char *path, int oflag, mode_t mode, squidaio_result_t * resultp) |
cd748f27 | 661 | { |
e65c313f | 662 | squidaio_init(); |
c04d4f40 | 663 | squidaio_request_t *requestp; |
cd748f27 | 664 | |
b001e822 | 665 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 666 | |
c04d4f40 | 667 | requestp->path = (char *) squidaio_xstrdup(path); |
62e76326 | 668 | |
cd748f27 | 669 | requestp->oflag = oflag; |
62e76326 | 670 | |
cd748f27 | 671 | requestp->mode = mode; |
62e76326 | 672 | |
cd748f27 | 673 | requestp->resultp = resultp; |
62e76326 | 674 | |
cd748f27 | 675 | requestp->request_type = _AIO_OP_OPEN; |
62e76326 | 676 | |
cd748f27 | 677 | requestp->cancelled = 0; |
62e76326 | 678 | |
12e137b0 | 679 | resultp->result_type = _AIO_OP_OPEN; |
cd748f27 | 680 | |
c04d4f40 | 681 | squidaio_queue_request(requestp); |
62e76326 | 682 | |
cd748f27 | 683 | return 0; |
684 | } | |
685 | ||
686 | ||
687 | static void | |
c04d4f40 | 688 | squidaio_do_open(squidaio_request_t * requestp) |
cd748f27 | 689 | { |
690 | requestp->ret = open(requestp->path, requestp->oflag, requestp->mode); | |
691 | requestp->err = errno; | |
692 | } | |
693 | ||
694 | ||
695 | int | |
ee139403 | 696 | squidaio_read(int fd, char *bufp, size_t bufs, off_t offset, int whence, squidaio_result_t * resultp) |
cd748f27 | 697 | { |
c04d4f40 | 698 | squidaio_request_t *requestp; |
cd748f27 | 699 | |
b001e822 | 700 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 701 | |
cd748f27 | 702 | requestp->fd = fd; |
62e76326 | 703 | |
cd748f27 | 704 | requestp->bufferp = bufp; |
62e76326 | 705 | |
cd748f27 | 706 | requestp->buflen = bufs; |
62e76326 | 707 | |
cd748f27 | 708 | requestp->offset = offset; |
62e76326 | 709 | |
cd748f27 | 710 | requestp->whence = whence; |
62e76326 | 711 | |
cd748f27 | 712 | requestp->resultp = resultp; |
62e76326 | 713 | |
cd748f27 | 714 | requestp->request_type = _AIO_OP_READ; |
62e76326 | 715 | |
cd748f27 | 716 | requestp->cancelled = 0; |
62e76326 | 717 | |
12e137b0 | 718 | resultp->result_type = _AIO_OP_READ; |
cd748f27 | 719 | |
c04d4f40 | 720 | squidaio_queue_request(requestp); |
62e76326 | 721 | |
cd748f27 | 722 | return 0; |
723 | } | |
724 | ||
725 | ||
726 | static void | |
c04d4f40 | 727 | squidaio_do_read(squidaio_request_t * requestp) |
cd748f27 | 728 | { |
729 | lseek(requestp->fd, requestp->offset, requestp->whence); | |
211f1d0b | 730 | requestp->ret = read(requestp->fd, requestp->bufferp, requestp->buflen); |
cd748f27 | 731 | requestp->err = errno; |
732 | } | |
733 | ||
734 | ||
735 | int | |
ee139403 | 736 | squidaio_write(int fd, char *bufp, size_t bufs, off_t offset, int whence, squidaio_result_t * resultp) |
cd748f27 | 737 | { |
c04d4f40 | 738 | squidaio_request_t *requestp; |
cd748f27 | 739 | |
b001e822 | 740 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 741 | |
cd748f27 | 742 | requestp->fd = fd; |
62e76326 | 743 | |
d06925a4 | 744 | requestp->bufferp = bufp; |
62e76326 | 745 | |
cd748f27 | 746 | requestp->buflen = bufs; |
62e76326 | 747 | |
cd748f27 | 748 | requestp->offset = offset; |
62e76326 | 749 | |
cd748f27 | 750 | requestp->whence = whence; |
62e76326 | 751 | |
cd748f27 | 752 | requestp->resultp = resultp; |
62e76326 | 753 | |
cd748f27 | 754 | requestp->request_type = _AIO_OP_WRITE; |
62e76326 | 755 | |
cd748f27 | 756 | requestp->cancelled = 0; |
62e76326 | 757 | |
12e137b0 | 758 | resultp->result_type = _AIO_OP_WRITE; |
cd748f27 | 759 | |
c04d4f40 | 760 | squidaio_queue_request(requestp); |
62e76326 | 761 | |
cd748f27 | 762 | return 0; |
763 | } | |
764 | ||
765 | ||
766 | static void | |
c04d4f40 | 767 | squidaio_do_write(squidaio_request_t * requestp) |
cd748f27 | 768 | { |
d06925a4 | 769 | requestp->ret = write(requestp->fd, requestp->bufferp, requestp->buflen); |
cd748f27 | 770 | requestp->err = errno; |
771 | } | |
772 | ||
773 | ||
774 | int | |
c04d4f40 | 775 | squidaio_close(int fd, squidaio_result_t * resultp) |
cd748f27 | 776 | { |
c04d4f40 | 777 | squidaio_request_t *requestp; |
cd748f27 | 778 | |
b001e822 | 779 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 780 | |
cd748f27 | 781 | requestp->fd = fd; |
62e76326 | 782 | |
cd748f27 | 783 | requestp->resultp = resultp; |
62e76326 | 784 | |
cd748f27 | 785 | requestp->request_type = _AIO_OP_CLOSE; |
62e76326 | 786 | |
cd748f27 | 787 | requestp->cancelled = 0; |
62e76326 | 788 | |
12e137b0 | 789 | resultp->result_type = _AIO_OP_CLOSE; |
cd748f27 | 790 | |
c04d4f40 | 791 | squidaio_queue_request(requestp); |
62e76326 | 792 | |
cd748f27 | 793 | return 0; |
794 | } | |
795 | ||
796 | ||
797 | static void | |
c04d4f40 | 798 | squidaio_do_close(squidaio_request_t * requestp) |
cd748f27 | 799 | { |
800 | requestp->ret = close(requestp->fd); | |
801 | requestp->err = errno; | |
802 | } | |
803 | ||
804 | ||
805 | int | |
62e76326 | 806 | |
c04d4f40 | 807 | squidaio_stat(const char *path, struct stat *sb, squidaio_result_t * resultp) |
cd748f27 | 808 | { |
e65c313f | 809 | squidaio_init(); |
c04d4f40 | 810 | squidaio_request_t *requestp; |
cd748f27 | 811 | |
b001e822 | 812 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 813 | |
c04d4f40 | 814 | requestp->path = (char *) squidaio_xstrdup(path); |
62e76326 | 815 | |
cd748f27 | 816 | requestp->statp = sb; |
62e76326 | 817 | |
c04d4f40 | 818 | requestp->tmpstatp = (struct stat *) squidaio_xmalloc(sizeof(struct stat)); |
62e76326 | 819 | |
cd748f27 | 820 | requestp->resultp = resultp; |
62e76326 | 821 | |
cd748f27 | 822 | requestp->request_type = _AIO_OP_STAT; |
62e76326 | 823 | |
cd748f27 | 824 | requestp->cancelled = 0; |
62e76326 | 825 | |
12e137b0 | 826 | resultp->result_type = _AIO_OP_STAT; |
cd748f27 | 827 | |
c04d4f40 | 828 | squidaio_queue_request(requestp); |
62e76326 | 829 | |
cd748f27 | 830 | return 0; |
831 | } | |
832 | ||
833 | ||
834 | static void | |
c04d4f40 | 835 | squidaio_do_stat(squidaio_request_t * requestp) |
cd748f27 | 836 | { |
837 | requestp->ret = stat(requestp->path, requestp->tmpstatp); | |
838 | requestp->err = errno; | |
839 | } | |
840 | ||
841 | ||
15a47d1d | 842 | int |
efa3acd1 | 843 | squidaio_unlink(const char *path, squidaio_result_t * resultp) |
15a47d1d | 844 | { |
e65c313f | 845 | squidaio_init(); |
c04d4f40 | 846 | squidaio_request_t *requestp; |
15a47d1d | 847 | |
b001e822 | 848 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 849 | |
efa3acd1 | 850 | requestp->path = squidaio_xstrdup(path); |
62e76326 | 851 | |
15a47d1d | 852 | requestp->resultp = resultp; |
62e76326 | 853 | |
efa3acd1 | 854 | requestp->request_type = _AIO_OP_UNLINK; |
62e76326 | 855 | |
15a47d1d | 856 | requestp->cancelled = 0; |
62e76326 | 857 | |
efa3acd1 | 858 | resultp->result_type = _AIO_OP_UNLINK; |
15a47d1d | 859 | |
c04d4f40 | 860 | squidaio_queue_request(requestp); |
62e76326 | 861 | |
15a47d1d | 862 | return 0; |
863 | } | |
864 | ||
865 | ||
866 | static void | |
efa3acd1 | 867 | squidaio_do_unlink(squidaio_request_t * requestp) |
15a47d1d | 868 | { |
efa3acd1 | 869 | requestp->ret = unlink(requestp->path); |
15a47d1d | 870 | requestp->err = errno; |
871 | } | |
872 | ||
cd748f27 | 873 | #if AIO_OPENDIR |
c04d4f40 | 874 | /* XXX squidaio_opendir NOT implemented yet.. */ |
cd748f27 | 875 | |
876 | int | |
c04d4f40 | 877 | squidaio_opendir(const char *path, squidaio_result_t * resultp) |
cd748f27 | 878 | { |
c04d4f40 | 879 | squidaio_request_t *requestp; |
cd748f27 | 880 | int len; |
881 | ||
b001e822 | 882 | requestp = squidaio_request_pool->alloc(); |
62e76326 | 883 | |
12e137b0 | 884 | resultp->result_type = _AIO_OP_OPENDIR; |
62e76326 | 885 | |
cd748f27 | 886 | return -1; |
887 | } | |
888 | ||
889 | static void | |
c04d4f40 | 890 | squidaio_do_opendir(squidaio_request_t * requestp) |
cd748f27 | 891 | { |
892 | /* NOT IMPLEMENTED */ | |
893 | } | |
894 | ||
895 | #endif | |
896 | ||
55f0e6f7 | 897 | static void |
c04d4f40 | 898 | squidaio_poll_queues(void) |
55f0e6f7 | 899 | { |
900 | /* kick "overflow" request queue */ | |
62e76326 | 901 | |
55f0e6f7 | 902 | if (request_queue2.head && |
62e76326 | 903 | pthread_mutex_trylock(&request_queue.mutex) == 0) { |
904 | *request_queue.tailp = request_queue2.head; | |
905 | request_queue.tailp = request_queue2.tailp; | |
906 | pthread_cond_signal(&request_queue.cond); | |
907 | pthread_mutex_unlock(&request_queue.mutex); | |
908 | request_queue2.head = NULL; | |
909 | request_queue2.tailp = &request_queue2.head; | |
55f0e6f7 | 910 | } |
62e76326 | 911 | |
55f0e6f7 | 912 | /* poll done queue */ |
913 | if (done_queue.head && pthread_mutex_trylock(&done_queue.mutex) == 0) { | |
62e76326 | 914 | |
915 | struct squidaio_request_t *requests = done_queue.head; | |
916 | done_queue.head = NULL; | |
917 | done_queue.tailp = &done_queue.head; | |
918 | pthread_mutex_unlock(&done_queue.mutex); | |
919 | *done_requests.tailp = requests; | |
920 | request_queue_len -= 1; | |
921 | ||
922 | while (requests->next) { | |
923 | requests = requests->next; | |
924 | request_queue_len -= 1; | |
925 | } | |
926 | ||
927 | done_requests.tailp = &requests->next; | |
55f0e6f7 | 928 | } |
55f0e6f7 | 929 | } |
cd748f27 | 930 | |
c04d4f40 | 931 | squidaio_result_t * |
932 | squidaio_poll_done(void) | |
cd748f27 | 933 | { |
c04d4f40 | 934 | squidaio_request_t *request; |
935 | squidaio_result_t *resultp; | |
cd748f27 | 936 | int cancelled; |
55f0e6f7 | 937 | int polled = 0; |
cd748f27 | 938 | |
62e76326 | 939 | AIO_REPOLL: |
55f0e6f7 | 940 | request = done_requests.head; |
62e76326 | 941 | |
55f0e6f7 | 942 | if (request == NULL && !polled) { |
62e76326 | 943 | CommIO::ResetNotifications(); |
944 | squidaio_poll_queues(); | |
945 | polled = 1; | |
946 | request = done_requests.head; | |
55f0e6f7 | 947 | } |
62e76326 | 948 | |
55f0e6f7 | 949 | if (!request) { |
62e76326 | 950 | return NULL; |
cd748f27 | 951 | } |
62e76326 | 952 | |
bf8fe701 | 953 | debugs(43, 9, "squidaio_poll_done: " << request << " type=" << request->request_type << " result=" << request->resultp); |
55f0e6f7 | 954 | done_requests.head = request->next; |
62e76326 | 955 | |
55f0e6f7 | 956 | if (!done_requests.head) |
62e76326 | 957 | done_requests.tailp = &done_requests.head; |
958 | ||
55f0e6f7 | 959 | resultp = request->resultp; |
62e76326 | 960 | |
55f0e6f7 | 961 | cancelled = request->cancelled; |
62e76326 | 962 | |
c04d4f40 | 963 | squidaio_debug(request); |
62e76326 | 964 | |
bf8fe701 | 965 | debugs(43, 5, "DONE: " << request->ret << " -> " << request->err); |
62e76326 | 966 | |
c04d4f40 | 967 | squidaio_cleanup_request(request); |
62e76326 | 968 | |
cd748f27 | 969 | if (cancelled) |
62e76326 | 970 | goto AIO_REPOLL; |
971 | ||
cd748f27 | 972 | return resultp; |
c04d4f40 | 973 | } /* squidaio_poll_done */ |
cd748f27 | 974 | |
975 | int | |
c04d4f40 | 976 | squidaio_operations_pending(void) |
cd748f27 | 977 | { |
55f0e6f7 | 978 | return request_queue_len + (done_requests.head ? 1 : 0); |
cd748f27 | 979 | } |
980 | ||
981 | int | |
c04d4f40 | 982 | squidaio_sync(void) |
cd748f27 | 983 | { |
55f0e6f7 | 984 | /* XXX This might take a while if the queue is large.. */ |
62e76326 | 985 | |
cd748f27 | 986 | do { |
62e76326 | 987 | squidaio_poll_queues(); |
cd748f27 | 988 | } while (request_queue_len > 0); |
62e76326 | 989 | |
c04d4f40 | 990 | return squidaio_operations_pending(); |
cd748f27 | 991 | } |
992 | ||
993 | int | |
c04d4f40 | 994 | squidaio_get_queue_len(void) |
cd748f27 | 995 | { |
996 | return request_queue_len; | |
997 | } | |
998 | ||
999 | static void | |
c04d4f40 | 1000 | squidaio_debug(squidaio_request_t * request) |
cd748f27 | 1001 | { |
55f0e6f7 | 1002 | switch (request->request_type) { |
62e76326 | 1003 | |
cd748f27 | 1004 | case _AIO_OP_OPEN: |
bf8fe701 | 1005 | debugs(43, 5, "OPEN of " << request->path << " to FD " << request->ret); |
62e76326 | 1006 | break; |
1007 | ||
cd748f27 | 1008 | case _AIO_OP_READ: |
bf8fe701 | 1009 | debugs(43, 5, "READ on fd: " << request->fd); |
62e76326 | 1010 | break; |
1011 | ||
cd748f27 | 1012 | case _AIO_OP_WRITE: |
bf8fe701 | 1013 | debugs(43, 5, "WRITE on fd: " << request->fd); |
62e76326 | 1014 | break; |
1015 | ||
cd748f27 | 1016 | case _AIO_OP_CLOSE: |
bf8fe701 | 1017 | debugs(43, 5, "CLOSE of fd: " << request->fd); |
62e76326 | 1018 | break; |
1019 | ||
cd748f27 | 1020 | case _AIO_OP_UNLINK: |
bf8fe701 | 1021 | debugs(43, 5, "UNLINK of " << request->path); |
62e76326 | 1022 | break; |
1023 | ||
cd748f27 | 1024 | default: |
62e76326 | 1025 | break; |
cd748f27 | 1026 | } |
1027 | } | |
b0465494 | 1028 | |
1029 | void | |
1030 | squidaio_stats(StoreEntry * sentry) | |
1031 | { | |
1032 | squidaio_thread_t *threadp; | |
1033 | int i; | |
1034 | ||
1035 | if (!squidaio_initialised) | |
1036 | return; | |
1037 | ||
1038 | storeAppendPrintf(sentry, "\n\nThreads Status:\n"); | |
1039 | ||
1040 | storeAppendPrintf(sentry, "#\tID\t# Requests\n"); | |
1041 | ||
1042 | threadp = threads; | |
1043 | ||
1044 | for (i = 0; i < NUMTHREADS; i++) { | |
691aef5a | 1045 | storeAppendPrintf(sentry, "%i\t0x%lx\t%ld\n", i + 1, (unsigned long)threadp->thread, threadp->requests); |
b0465494 | 1046 | threadp = threadp->next; |
1047 | } | |
1048 | } |