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595c7973 | 1 | /* |
bbc27441 | 2 | * Copyright (C) 1996-2014 The Squid Software Foundation and contributors |
595c7973 | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
595c7973 | 7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 43 Windows AIOPS */ |
10 | ||
582c2af2 | 11 | #include "squid.h" |
1ff991dc | 12 | #include "DiskIO/DiskThreads/CommIO.h" |
595c7973 | 13 | #include "DiskThreads.h" |
1e1a9021 | 14 | #include "fd.h" |
bb1373a6 | 15 | #include "mem/Pool.h" |
4d5904f7 | 16 | #include "SquidConfig.h" |
489520a9 AJ |
17 | #include "SquidTime.h" |
18 | #include "Store.h" | |
595c7973 | 19 | |
1a30fdf5 | 20 | #include <cerrno> |
074d6a40 | 21 | #include <csignal> |
4d5904f7 FC |
22 | #include <sys/stat.h> |
23 | #include <fcntl.h> | |
4d5904f7 | 24 | #include <dirent.h> |
595c7973 | 25 | |
f53969cc | 26 | #define RIDICULOUS_LENGTH 4096 |
595c7973 | 27 | |
28 | enum _squidaio_thread_status { | |
29 | _THREAD_STARTING = 0, | |
30 | _THREAD_WAITING, | |
31 | _THREAD_BUSY, | |
32 | _THREAD_FAILED, | |
33 | _THREAD_DONE | |
34 | }; | |
35 | typedef enum _squidaio_thread_status squidaio_thread_status; | |
36 | ||
26ac0430 | 37 | typedef struct squidaio_request_t { |
595c7973 | 38 | |
39 | struct squidaio_request_t *next; | |
40 | squidaio_request_type request_type; | |
41 | int cancelled; | |
42 | char *path; | |
43 | int oflag; | |
44 | mode_t mode; | |
45 | int fd; | |
46 | char *bufferp; | |
47 | char *tmpbufp; | |
ee139403 | 48 | size_t buflen; |
595c7973 | 49 | off_t offset; |
50 | int whence; | |
51 | int ret; | |
52 | int err; | |
53 | ||
54 | struct stat *tmpstatp; | |
55 | ||
56 | struct stat *statp; | |
57 | squidaio_result_t *resultp; | |
2fadd50d | 58 | } squidaio_request_t; |
595c7973 | 59 | |
26ac0430 | 60 | typedef struct squidaio_request_queue_t { |
595c7973 | 61 | HANDLE mutex; |
62 | HANDLE cond; /* See Event objects */ | |
63 | squidaio_request_t *volatile head; | |
64 | squidaio_request_t *volatile *volatile tailp; | |
65 | unsigned long requests; | |
f53969cc | 66 | unsigned long blocked; /* main failed to lock the queue */ |
2fadd50d | 67 | } squidaio_request_queue_t; |
595c7973 | 68 | |
69 | typedef struct squidaio_thread_t squidaio_thread_t; | |
70 | ||
26ac0430 | 71 | struct squidaio_thread_t { |
595c7973 | 72 | squidaio_thread_t *next; |
73 | HANDLE thread; | |
74 | DWORD dwThreadId; /* thread ID */ | |
75 | squidaio_thread_status status; | |
76 | ||
77 | struct squidaio_request_t *current_req; | |
78 | unsigned long requests; | |
79 | int volatile exit; | |
80 | }; | |
81 | ||
82 | static void squidaio_queue_request(squidaio_request_t *); | |
83 | static void squidaio_cleanup_request(squidaio_request_t *); | |
84 | static DWORD WINAPI squidaio_thread_loop( LPVOID lpParam ); | |
85 | static void squidaio_do_open(squidaio_request_t *); | |
86 | static void squidaio_do_read(squidaio_request_t *); | |
87 | static void squidaio_do_write(squidaio_request_t *); | |
88 | static void squidaio_do_close(squidaio_request_t *); | |
89 | static void squidaio_do_stat(squidaio_request_t *); | |
595c7973 | 90 | static void squidaio_do_unlink(squidaio_request_t *); |
595c7973 | 91 | #if AIO_OPENDIR |
92 | static void *squidaio_do_opendir(squidaio_request_t *); | |
93 | #endif | |
94 | static void squidaio_debug(squidaio_request_t *); | |
95 | static void squidaio_poll_queues(void); | |
96 | ||
97 | static squidaio_thread_t *threads = NULL; | |
98 | static int squidaio_initialised = 0; | |
99 | ||
595c7973 | 100 | #define AIO_LARGE_BUFS 16384 |
f53969cc SM |
101 | #define AIO_MEDIUM_BUFS AIO_LARGE_BUFS >> 1 |
102 | #define AIO_SMALL_BUFS AIO_LARGE_BUFS >> 2 | |
103 | #define AIO_TINY_BUFS AIO_LARGE_BUFS >> 3 | |
104 | #define AIO_MICRO_BUFS 128 | |
595c7973 | 105 | |
f53969cc SM |
106 | static MemAllocator *squidaio_large_bufs = NULL; /* 16K */ |
107 | static MemAllocator *squidaio_medium_bufs = NULL; /* 8K */ | |
108 | static MemAllocator *squidaio_small_bufs = NULL; /* 4K */ | |
109 | static MemAllocator *squidaio_tiny_bufs = NULL; /* 2K */ | |
110 | static MemAllocator *squidaio_micro_bufs = NULL; /* 128K */ | |
595c7973 | 111 | |
112 | static int request_queue_len = 0; | |
113 | static MemAllocator *squidaio_request_pool = NULL; | |
114 | static MemAllocator *squidaio_thread_pool = NULL; | |
115 | static squidaio_request_queue_t request_queue; | |
116 | ||
26ac0430 | 117 | static struct { |
595c7973 | 118 | squidaio_request_t *head, **tailp; |
119 | } | |
120 | ||
121 | request_queue2 = { | |
122 | ||
26ac0430 AJ |
123 | NULL, &request_queue2.head |
124 | }; | |
595c7973 | 125 | static squidaio_request_queue_t done_queue; |
126 | ||
26ac0430 | 127 | static struct { |
595c7973 | 128 | squidaio_request_t *head, **tailp; |
129 | } | |
130 | ||
131 | done_requests = { | |
132 | ||
26ac0430 AJ |
133 | NULL, &done_requests.head |
134 | }; | |
595c7973 | 135 | |
136 | static HANDLE main_thread; | |
137 | ||
138 | static MemAllocator * | |
139 | squidaio_get_pool(int size) | |
140 | { | |
141 | if (size <= AIO_LARGE_BUFS) { | |
142 | if (size <= AIO_MICRO_BUFS) | |
143 | return squidaio_micro_bufs; | |
144 | else if (size <= AIO_TINY_BUFS) | |
145 | return squidaio_tiny_bufs; | |
146 | else if (size <= AIO_SMALL_BUFS) | |
147 | return squidaio_small_bufs; | |
148 | else if (size <= AIO_MEDIUM_BUFS) | |
149 | return squidaio_medium_bufs; | |
150 | else | |
151 | return squidaio_large_bufs; | |
152 | } | |
153 | ||
154 | return NULL; | |
155 | } | |
156 | ||
157 | void * | |
158 | squidaio_xmalloc(int size) | |
159 | { | |
160 | void *p; | |
161 | MemAllocator *pool; | |
162 | ||
163 | if ((pool = squidaio_get_pool(size)) != NULL) { | |
164 | p = pool->alloc(); | |
165 | } else | |
166 | p = xmalloc(size); | |
167 | ||
168 | return p; | |
169 | } | |
170 | ||
171 | static char * | |
172 | squidaio_xstrdup(const char *str) | |
173 | { | |
174 | char *p; | |
175 | int len = strlen(str) + 1; | |
176 | ||
177 | p = (char *)squidaio_xmalloc(len); | |
178 | strncpy(p, str, len); | |
179 | ||
180 | return p; | |
181 | } | |
182 | ||
183 | void | |
184 | squidaio_xfree(void *p, int size) | |
185 | { | |
186 | MemAllocator *pool; | |
187 | ||
188 | if ((pool = squidaio_get_pool(size)) != NULL) { | |
1e1a9021 | 189 | pool->freeOne(p); |
595c7973 | 190 | } else |
191 | xfree(p); | |
192 | } | |
193 | ||
194 | static void | |
195 | squidaio_xstrfree(char *str) | |
196 | { | |
197 | MemAllocator *pool; | |
198 | int len = strlen(str) + 1; | |
199 | ||
200 | if ((pool = squidaio_get_pool(len)) != NULL) { | |
1e1a9021 | 201 | pool->freeOne(str); |
595c7973 | 202 | } else |
203 | xfree(str); | |
204 | } | |
205 | ||
206 | void | |
207 | squidaio_init(void) | |
208 | { | |
209 | int i; | |
210 | squidaio_thread_t *threadp; | |
211 | ||
212 | if (squidaio_initialised) | |
213 | return; | |
214 | ||
215 | if (!DuplicateHandle(GetCurrentProcess(), /* pseudo handle, don't close */ | |
216 | GetCurrentThread(), /* pseudo handle to copy */ | |
217 | GetCurrentProcess(), /* pseudo handle, don't close */ | |
218 | &main_thread, | |
219 | 0, /* required access */ | |
220 | FALSE, /* child process's don't inherit the handle */ | |
221 | DUPLICATE_SAME_ACCESS)) { | |
222 | /* spit errors */ | |
223 | fatal("Couldn't get current thread handle"); | |
224 | } | |
225 | ||
226 | /* Initialize request queue */ | |
227 | if ((request_queue.mutex = CreateMutex(NULL, /* no inheritance */ | |
228 | FALSE, /* start unowned (as per mutex_init) */ | |
229 | NULL) /* no name */ | |
230 | ) == NULL) { | |
231 | fatal("Failed to create mutex"); | |
232 | } | |
233 | ||
234 | if ((request_queue.cond = CreateEvent(NULL, /* no inheritance */ | |
235 | FALSE, /* auto signal reset - which I think is pthreads like ? */ | |
236 | FALSE, /* start non signaled */ | |
237 | NULL) /* no name */ | |
238 | ) == NULL) { | |
239 | fatal("Failed to create condition variable"); | |
240 | } | |
241 | ||
242 | request_queue.head = NULL; | |
243 | ||
244 | request_queue.tailp = &request_queue.head; | |
245 | ||
246 | request_queue.requests = 0; | |
247 | ||
248 | request_queue.blocked = 0; | |
249 | ||
250 | /* Initialize done queue */ | |
251 | ||
252 | if ((done_queue.mutex = CreateMutex(NULL, /* no inheritance */ | |
253 | FALSE, /* start unowned (as per mutex_init) */ | |
254 | NULL) /* no name */ | |
255 | ) == NULL) { | |
256 | fatal("Failed to create mutex"); | |
257 | } | |
258 | ||
259 | if ((done_queue.cond = CreateEvent(NULL, /* no inheritance */ | |
260 | TRUE, /* manually signaled - which I think is pthreads like ? */ | |
261 | FALSE, /* start non signaled */ | |
262 | NULL) /* no name */ | |
263 | ) == NULL) { | |
264 | fatal("Failed to create condition variable"); | |
265 | } | |
266 | ||
267 | done_queue.head = NULL; | |
268 | ||
269 | done_queue.tailp = &done_queue.head; | |
270 | ||
271 | done_queue.requests = 0; | |
272 | ||
273 | done_queue.blocked = 0; | |
274 | ||
1e1a9021 AJ |
275 | // Initialize the thread I/O pipes before creating any threads |
276 | // see bug 3189 comment 5 about race conditions. | |
277 | CommIO::Initialize(); | |
595c7973 | 278 | |
279 | /* Create threads and get them to sit in their wait loop */ | |
280 | squidaio_thread_pool = memPoolCreate("aio_thread", sizeof(squidaio_thread_t)); | |
281 | ||
282 | assert(NUMTHREADS); | |
283 | ||
cb4185f1 | 284 | for (i = 0; i < NUMTHREADS; ++i) { |
595c7973 | 285 | threadp = (squidaio_thread_t *)squidaio_thread_pool->alloc(); |
286 | threadp->status = _THREAD_STARTING; | |
287 | threadp->current_req = NULL; | |
288 | threadp->requests = 0; | |
289 | threadp->next = threads; | |
290 | threads = threadp; | |
291 | ||
292 | if ((threadp->thread = CreateThread(NULL, /* no security attributes */ | |
293 | 0, /* use default stack size */ | |
294 | squidaio_thread_loop, /* thread function */ | |
295 | threadp, /* argument to thread function */ | |
296 | 0, /* use default creation flags */ | |
297 | &(threadp->dwThreadId)) /* returns the thread identifier */ | |
298 | ) == NULL) { | |
299 | fprintf(stderr, "Thread creation failed\n"); | |
300 | threadp->status = _THREAD_FAILED; | |
301 | continue; | |
302 | } | |
303 | ||
304 | /* Set the new thread priority above parent process */ | |
305 | SetThreadPriority(threadp->thread,THREAD_PRIORITY_ABOVE_NORMAL); | |
306 | } | |
307 | ||
308 | /* Create request pool */ | |
309 | squidaio_request_pool = memPoolCreate("aio_request", sizeof(squidaio_request_t)); | |
310 | ||
311 | squidaio_large_bufs = memPoolCreate("squidaio_large_bufs", AIO_LARGE_BUFS); | |
312 | ||
313 | squidaio_medium_bufs = memPoolCreate("squidaio_medium_bufs", AIO_MEDIUM_BUFS); | |
314 | ||
315 | squidaio_small_bufs = memPoolCreate("squidaio_small_bufs", AIO_SMALL_BUFS); | |
316 | ||
317 | squidaio_tiny_bufs = memPoolCreate("squidaio_tiny_bufs", AIO_TINY_BUFS); | |
318 | ||
319 | squidaio_micro_bufs = memPoolCreate("squidaio_micro_bufs", AIO_MICRO_BUFS); | |
320 | ||
321 | squidaio_initialised = 1; | |
322 | } | |
323 | ||
324 | void | |
325 | squidaio_shutdown(void) | |
326 | { | |
327 | squidaio_thread_t *threadp; | |
328 | int i; | |
329 | HANDLE * hthreads; | |
330 | ||
331 | if (!squidaio_initialised) | |
332 | return; | |
333 | ||
334 | /* This is the same as in squidaio_sync */ | |
335 | do { | |
336 | squidaio_poll_queues(); | |
337 | } while (request_queue_len > 0); | |
338 | ||
339 | hthreads = (HANDLE *) xcalloc (NUMTHREADS, sizeof (HANDLE)); | |
340 | ||
341 | threadp = threads; | |
342 | ||
cb4185f1 | 343 | for (i = 0; i < NUMTHREADS; ++i) { |
595c7973 | 344 | threadp->exit = 1; |
345 | hthreads[i] = threadp->thread; | |
346 | threadp = threadp->next; | |
347 | } | |
348 | ||
349 | ReleaseMutex(request_queue.mutex); | |
350 | ResetEvent(request_queue.cond); | |
351 | ReleaseMutex(done_queue.mutex); | |
352 | ResetEvent(done_queue.cond); | |
353 | Sleep(0); | |
354 | ||
355 | WaitForMultipleObjects(NUMTHREADS, hthreads, TRUE, 2000); | |
356 | ||
cb4185f1 | 357 | for (i = 0; i < NUMTHREADS; ++i) { |
595c7973 | 358 | CloseHandle(hthreads[i]); |
359 | } | |
360 | ||
361 | CloseHandle(main_thread); | |
362 | CommIO::NotifyIOClose(); | |
363 | ||
364 | squidaio_initialised = 0; | |
365 | xfree(hthreads); | |
366 | } | |
367 | ||
368 | static DWORD WINAPI | |
369 | squidaio_thread_loop(LPVOID lpParam) | |
370 | { | |
371 | squidaio_thread_t *threadp = (squidaio_thread_t *)lpParam; | |
372 | squidaio_request_t *request; | |
373 | HANDLE cond; /* local copy of the event queue because win32 event handles | |
374 | * don't atomically release the mutex as cond variables do. */ | |
375 | ||
376 | /* lock the thread info */ | |
377 | ||
378 | if (WAIT_FAILED == WaitForSingleObject(request_queue.mutex, INFINITE)) { | |
379 | fatal("Can't get ownership of mutex\n"); | |
380 | } | |
381 | ||
382 | /* duplicate the handle */ | |
383 | if (!DuplicateHandle(GetCurrentProcess(), /* pseudo handle, don't close */ | |
384 | request_queue.cond, /* handle to copy */ | |
385 | GetCurrentProcess(), /* pseudo handle, don't close */ | |
386 | &cond, | |
387 | 0, /* required access */ | |
388 | FALSE, /* child process's don't inherit the handle */ | |
389 | DUPLICATE_SAME_ACCESS)) | |
390 | fatal("Can't duplicate mutex handle\n"); | |
391 | ||
392 | if (!ReleaseMutex(request_queue.mutex)) { | |
393 | CloseHandle(cond); | |
394 | fatal("Can't release mutex\n"); | |
395 | } | |
396 | ||
397 | Sleep(0); | |
398 | ||
399 | while (1) { | |
400 | DWORD rv; | |
401 | threadp->current_req = request = NULL; | |
402 | request = NULL; | |
403 | /* Get a request to process */ | |
404 | threadp->status = _THREAD_WAITING; | |
405 | ||
406 | if (threadp->exit) { | |
407 | CloseHandle(request_queue.mutex); | |
408 | CloseHandle(cond); | |
409 | return 0; | |
410 | } | |
411 | ||
412 | rv = WaitForSingleObject(request_queue.mutex, INFINITE); | |
413 | ||
414 | if (rv == WAIT_FAILED) { | |
415 | CloseHandle(cond); | |
416 | return 1; | |
417 | } | |
418 | ||
419 | while (!request_queue.head) { | |
420 | if (!ReleaseMutex(request_queue.mutex)) { | |
421 | CloseHandle(cond); | |
422 | threadp->status = _THREAD_FAILED; | |
423 | return 1; | |
424 | } | |
425 | ||
426 | Sleep(0); | |
427 | rv = WaitForSingleObject(cond, INFINITE); | |
428 | ||
429 | if (rv == WAIT_FAILED) { | |
430 | CloseHandle(cond); | |
431 | return 1; | |
432 | } | |
433 | ||
434 | rv = WaitForSingleObject(request_queue.mutex, INFINITE); | |
435 | ||
436 | if (rv == WAIT_FAILED) { | |
437 | CloseHandle(cond); | |
438 | return 1; | |
439 | } | |
440 | } | |
441 | ||
442 | request = request_queue.head; | |
443 | ||
444 | if (request) | |
445 | request_queue.head = request->next; | |
446 | ||
447 | if (!request_queue.head) | |
448 | request_queue.tailp = &request_queue.head; | |
449 | ||
450 | if (!ReleaseMutex(request_queue.mutex)) { | |
451 | CloseHandle(cond); | |
452 | return 1; | |
453 | } | |
454 | ||
455 | Sleep(0); | |
456 | ||
457 | /* process the request */ | |
458 | threadp->status = _THREAD_BUSY; | |
459 | ||
460 | request->next = NULL; | |
461 | ||
462 | threadp->current_req = request; | |
463 | ||
464 | errno = 0; | |
465 | ||
466 | if (!request->cancelled) { | |
467 | switch (request->request_type) { | |
468 | ||
469 | case _AIO_OP_OPEN: | |
470 | squidaio_do_open(request); | |
471 | break; | |
472 | ||
473 | case _AIO_OP_READ: | |
474 | squidaio_do_read(request); | |
475 | break; | |
476 | ||
477 | case _AIO_OP_WRITE: | |
478 | squidaio_do_write(request); | |
479 | break; | |
480 | ||
481 | case _AIO_OP_CLOSE: | |
482 | squidaio_do_close(request); | |
483 | break; | |
484 | ||
595c7973 | 485 | case _AIO_OP_UNLINK: |
486 | squidaio_do_unlink(request); | |
487 | break; | |
488 | ||
f53969cc | 489 | #if AIO_OPENDIR /* Opendir not implemented yet */ |
595c7973 | 490 | |
491 | case _AIO_OP_OPENDIR: | |
492 | squidaio_do_opendir(request); | |
493 | break; | |
494 | #endif | |
495 | ||
496 | case _AIO_OP_STAT: | |
497 | squidaio_do_stat(request); | |
498 | break; | |
499 | ||
500 | default: | |
501 | request->ret = -1; | |
502 | request->err = EINVAL; | |
503 | break; | |
504 | } | |
f53969cc | 505 | } else { /* cancelled */ |
595c7973 | 506 | request->ret = -1; |
507 | request->err = EINTR; | |
508 | } | |
509 | ||
510 | threadp->status = _THREAD_DONE; | |
511 | /* put the request in the done queue */ | |
512 | rv = WaitForSingleObject(done_queue.mutex, INFINITE); | |
513 | ||
514 | if (rv == WAIT_FAILED) { | |
515 | CloseHandle(cond); | |
516 | return 1; | |
517 | } | |
518 | ||
519 | *done_queue.tailp = request; | |
520 | done_queue.tailp = &request->next; | |
521 | ||
522 | if (!ReleaseMutex(done_queue.mutex)) { | |
523 | CloseHandle(cond); | |
524 | return 1; | |
525 | } | |
526 | ||
527 | CommIO::NotifyIOCompleted(); | |
528 | Sleep(0); | |
cb4185f1 | 529 | ++ threadp->requests; |
f53969cc | 530 | } /* while forever */ |
595c7973 | 531 | |
532 | CloseHandle(cond); | |
533 | ||
534 | return 0; | |
f53969cc | 535 | } /* squidaio_thread_loop */ |
595c7973 | 536 | |
537 | static void | |
538 | squidaio_queue_request(squidaio_request_t * request) | |
539 | { | |
540 | static int high_start = 0; | |
bf8fe701 | 541 | debugs(43, 9, "squidaio_queue_request: " << request << " type=" << request->request_type << " result=" << request->resultp); |
595c7973 | 542 | /* Mark it as not executed (failing result, no error) */ |
543 | request->ret = -1; | |
544 | request->err = 0; | |
545 | /* Internal housekeeping */ | |
546 | request_queue_len += 1; | |
547 | request->resultp->_data = request; | |
548 | /* Play some tricks with the request_queue2 queue */ | |
549 | request->next = NULL; | |
550 | ||
551 | if (WaitForSingleObject(request_queue.mutex, 0) == WAIT_OBJECT_0) { | |
552 | if (request_queue2.head) { | |
553 | /* Grab blocked requests */ | |
554 | *request_queue.tailp = request_queue2.head; | |
555 | request_queue.tailp = request_queue2.tailp; | |
556 | } | |
557 | ||
558 | /* Enqueue request */ | |
559 | *request_queue.tailp = request; | |
560 | ||
561 | request_queue.tailp = &request->next; | |
562 | ||
563 | if (!SetEvent(request_queue.cond)) | |
564 | fatal("Couldn't push queue"); | |
565 | ||
566 | if (!ReleaseMutex(request_queue.mutex)) { | |
567 | /* unexpected error */ | |
568 | fatal("Couldn't push queue"); | |
569 | } | |
570 | ||
571 | Sleep(0); | |
572 | ||
573 | if (request_queue2.head) { | |
574 | /* Clear queue of blocked requests */ | |
575 | request_queue2.head = NULL; | |
576 | request_queue2.tailp = &request_queue2.head; | |
577 | } | |
578 | } else { | |
579 | /* Oops, the request queue is blocked, use request_queue2 */ | |
580 | *request_queue2.tailp = request; | |
581 | request_queue2.tailp = &request->next; | |
582 | } | |
583 | ||
584 | if (request_queue2.head) { | |
585 | static int filter = 0; | |
586 | static int filter_limit = 8; | |
587 | ||
588 | if (++filter >= filter_limit) { | |
589 | filter_limit += filter; | |
590 | filter = 0; | |
e0236918 | 591 | debugs(43, DBG_IMPORTANT, "squidaio_queue_request: WARNING - Queue congestion"); |
595c7973 | 592 | } |
593 | } | |
594 | ||
595 | /* Warn if out of threads */ | |
596 | if (request_queue_len > MAGIC1) { | |
597 | static int last_warn = 0; | |
598 | static int queue_high, queue_low; | |
599 | ||
600 | if (high_start == 0) { | |
601 | high_start = (int)squid_curtime; | |
602 | queue_high = request_queue_len; | |
603 | queue_low = request_queue_len; | |
604 | } | |
605 | ||
606 | if (request_queue_len > queue_high) | |
607 | queue_high = request_queue_len; | |
608 | ||
609 | if (request_queue_len < queue_low) | |
610 | queue_low = request_queue_len; | |
611 | ||
612 | if (squid_curtime >= (last_warn + 15) && | |
613 | squid_curtime >= (high_start + 5)) { | |
e0236918 | 614 | debugs(43, DBG_IMPORTANT, "squidaio_queue_request: WARNING - Disk I/O overloading"); |
595c7973 | 615 | |
616 | if (squid_curtime >= (high_start + 15)) | |
e0236918 | 617 | debugs(43, DBG_IMPORTANT, "squidaio_queue_request: Queue Length: current=" << |
bf8fe701 | 618 | request_queue_len << ", high=" << queue_high << |
619 | ", low=" << queue_low << ", duration=" << | |
620 | (long int) (squid_curtime - high_start)); | |
595c7973 | 621 | |
622 | last_warn = (int)squid_curtime; | |
623 | } | |
624 | } else { | |
625 | high_start = 0; | |
626 | } | |
627 | ||
628 | /* Warn if seriously overloaded */ | |
629 | if (request_queue_len > RIDICULOUS_LENGTH) { | |
fa84c01d FC |
630 | debugs(43, DBG_CRITICAL, "squidaio_queue_request: Async request queue growing uncontrollably!"); |
631 | debugs(43, DBG_CRITICAL, "squidaio_queue_request: Syncing pending I/O operations.. (blocking)"); | |
595c7973 | 632 | squidaio_sync(); |
fa84c01d | 633 | debugs(43, DBG_CRITICAL, "squidaio_queue_request: Synced"); |
595c7973 | 634 | } |
f53969cc | 635 | } /* squidaio_queue_request */ |
595c7973 | 636 | |
637 | static void | |
638 | squidaio_cleanup_request(squidaio_request_t * requestp) | |
639 | { | |
640 | squidaio_result_t *resultp = requestp->resultp; | |
641 | int cancelled = requestp->cancelled; | |
642 | ||
643 | /* Free allocated structures and copy data back to user space if the */ | |
644 | /* request hasn't been cancelled */ | |
645 | ||
646 | switch (requestp->request_type) { | |
647 | ||
648 | case _AIO_OP_STAT: | |
649 | ||
650 | if (!cancelled && requestp->ret == 0) | |
41d00cd3 | 651 | memcpy(requestp->statp, requestp->tmpstatp, sizeof(struct stat)); |
595c7973 | 652 | |
653 | squidaio_xfree(requestp->tmpstatp, sizeof(struct stat)); | |
654 | ||
655 | squidaio_xstrfree(requestp->path); | |
656 | ||
657 | break; | |
658 | ||
659 | case _AIO_OP_OPEN: | |
660 | if (cancelled && requestp->ret >= 0) | |
661 | /* The open() was cancelled but completed */ | |
662 | close(requestp->ret); | |
663 | ||
664 | squidaio_xstrfree(requestp->path); | |
665 | ||
666 | break; | |
667 | ||
668 | case _AIO_OP_CLOSE: | |
669 | if (cancelled && requestp->ret < 0) | |
670 | /* The close() was cancelled and never got executed */ | |
671 | close(requestp->fd); | |
672 | ||
673 | break; | |
674 | ||
675 | case _AIO_OP_UNLINK: | |
676 | ||
595c7973 | 677 | case _AIO_OP_OPENDIR: |
678 | squidaio_xstrfree(requestp->path); | |
679 | ||
680 | break; | |
681 | ||
682 | case _AIO_OP_READ: | |
683 | break; | |
684 | ||
685 | case _AIO_OP_WRITE: | |
686 | break; | |
687 | ||
688 | default: | |
689 | break; | |
690 | } | |
691 | ||
692 | if (resultp != NULL && !cancelled) { | |
693 | resultp->aio_return = requestp->ret; | |
694 | resultp->aio_errno = requestp->err; | |
695 | } | |
696 | ||
1e1a9021 | 697 | squidaio_request_pool->freeOne(requestp); |
f53969cc | 698 | } /* squidaio_cleanup_request */ |
595c7973 | 699 | |
595c7973 | 700 | int |
701 | squidaio_cancel(squidaio_result_t * resultp) | |
702 | { | |
703 | squidaio_request_t *request = (squidaio_request_t *)resultp->_data; | |
704 | ||
705 | if (request && request->resultp == resultp) { | |
bf8fe701 | 706 | debugs(43, 9, "squidaio_cancel: " << request << " type=" << request->request_type << " result=" << request->resultp); |
595c7973 | 707 | request->cancelled = 1; |
708 | request->resultp = NULL; | |
709 | resultp->_data = NULL; | |
710 | resultp->result_type = _AIO_OP_NONE; | |
711 | return 0; | |
712 | } | |
713 | ||
714 | return 1; | |
f53969cc | 715 | } /* squidaio_cancel */ |
595c7973 | 716 | |
595c7973 | 717 | int |
718 | squidaio_open(const char *path, int oflag, mode_t mode, squidaio_result_t * resultp) | |
719 | { | |
720 | squidaio_init(); | |
721 | squidaio_request_t *requestp; | |
722 | ||
723 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); | |
724 | ||
725 | requestp->path = (char *) squidaio_xstrdup(path); | |
726 | ||
727 | requestp->oflag = oflag; | |
728 | ||
729 | requestp->mode = mode; | |
730 | ||
731 | requestp->resultp = resultp; | |
732 | ||
733 | requestp->request_type = _AIO_OP_OPEN; | |
734 | ||
735 | requestp->cancelled = 0; | |
736 | ||
737 | resultp->result_type = _AIO_OP_OPEN; | |
738 | ||
739 | squidaio_queue_request(requestp); | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
595c7973 | 744 | static void |
745 | squidaio_do_open(squidaio_request_t * requestp) | |
746 | { | |
747 | requestp->ret = open(requestp->path, requestp->oflag, requestp->mode); | |
748 | requestp->err = errno; | |
749 | } | |
750 | ||
595c7973 | 751 | int |
ee139403 | 752 | squidaio_read(int fd, char *bufp, size_t bufs, off_t offset, int whence, squidaio_result_t * resultp) |
595c7973 | 753 | { |
754 | squidaio_request_t *requestp; | |
755 | ||
756 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); | |
757 | ||
758 | requestp->fd = fd; | |
759 | ||
760 | requestp->bufferp = bufp; | |
761 | ||
762 | requestp->buflen = bufs; | |
763 | ||
764 | requestp->offset = offset; | |
765 | ||
766 | requestp->whence = whence; | |
767 | ||
768 | requestp->resultp = resultp; | |
769 | ||
770 | requestp->request_type = _AIO_OP_READ; | |
771 | ||
772 | requestp->cancelled = 0; | |
773 | ||
774 | resultp->result_type = _AIO_OP_READ; | |
775 | ||
776 | squidaio_queue_request(requestp); | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
595c7973 | 781 | static void |
782 | squidaio_do_read(squidaio_request_t * requestp) | |
783 | { | |
784 | lseek(requestp->fd, requestp->offset, requestp->whence); | |
785 | ||
786 | if (!ReadFile((HANDLE)_get_osfhandle(requestp->fd), requestp->bufferp, | |
787 | requestp->buflen, (LPDWORD)&requestp->ret, NULL)) { | |
788 | WIN32_maperror(GetLastError()); | |
789 | requestp->ret = -1; | |
790 | } | |
791 | ||
792 | requestp->err = errno; | |
793 | } | |
794 | ||
595c7973 | 795 | int |
ee139403 | 796 | squidaio_write(int fd, char *bufp, size_t bufs, off_t offset, int whence, squidaio_result_t * resultp) |
595c7973 | 797 | { |
798 | squidaio_request_t *requestp; | |
799 | ||
800 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); | |
801 | ||
802 | requestp->fd = fd; | |
803 | ||
804 | requestp->bufferp = bufp; | |
805 | ||
806 | requestp->buflen = bufs; | |
807 | ||
808 | requestp->offset = offset; | |
809 | ||
810 | requestp->whence = whence; | |
811 | ||
812 | requestp->resultp = resultp; | |
813 | ||
814 | requestp->request_type = _AIO_OP_WRITE; | |
815 | ||
816 | requestp->cancelled = 0; | |
817 | ||
818 | resultp->result_type = _AIO_OP_WRITE; | |
819 | ||
820 | squidaio_queue_request(requestp); | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
595c7973 | 825 | static void |
826 | squidaio_do_write(squidaio_request_t * requestp) | |
827 | { | |
828 | if (!WriteFile((HANDLE)_get_osfhandle(requestp->fd), requestp->bufferp, | |
829 | requestp->buflen, (LPDWORD)&requestp->ret, NULL)) { | |
830 | WIN32_maperror(GetLastError()); | |
831 | requestp->ret = -1; | |
832 | } | |
833 | ||
834 | requestp->err = errno; | |
835 | } | |
836 | ||
595c7973 | 837 | int |
838 | squidaio_close(int fd, squidaio_result_t * resultp) | |
839 | { | |
840 | squidaio_request_t *requestp; | |
841 | ||
842 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); | |
843 | ||
844 | requestp->fd = fd; | |
845 | ||
846 | requestp->resultp = resultp; | |
847 | ||
848 | requestp->request_type = _AIO_OP_CLOSE; | |
849 | ||
850 | requestp->cancelled = 0; | |
851 | ||
852 | resultp->result_type = _AIO_OP_CLOSE; | |
853 | ||
854 | squidaio_queue_request(requestp); | |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
595c7973 | 859 | static void |
860 | squidaio_do_close(squidaio_request_t * requestp) | |
861 | { | |
26ac0430 | 862 | if ((requestp->ret = close(requestp->fd)) < 0) { |
fa84c01d | 863 | debugs(43, DBG_CRITICAL, "squidaio_do_close: FD " << requestp->fd << ", errno " << errno); |
595c7973 | 864 | close(requestp->fd); |
865 | } | |
866 | ||
867 | requestp->err = errno; | |
868 | } | |
869 | ||
595c7973 | 870 | int |
871 | ||
872 | squidaio_stat(const char *path, struct stat *sb, squidaio_result_t * resultp) | |
873 | { | |
874 | squidaio_init(); | |
875 | squidaio_request_t *requestp; | |
876 | ||
877 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); | |
878 | ||
879 | requestp->path = (char *) squidaio_xstrdup(path); | |
880 | ||
881 | requestp->statp = sb; | |
882 | ||
883 | requestp->tmpstatp = (struct stat *) squidaio_xmalloc(sizeof(struct stat)); | |
884 | ||
885 | requestp->resultp = resultp; | |
886 | ||
887 | requestp->request_type = _AIO_OP_STAT; | |
888 | ||
889 | requestp->cancelled = 0; | |
890 | ||
891 | resultp->result_type = _AIO_OP_STAT; | |
892 | ||
893 | squidaio_queue_request(requestp); | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
595c7973 | 898 | static void |
899 | squidaio_do_stat(squidaio_request_t * requestp) | |
900 | { | |
901 | requestp->ret = stat(requestp->path, requestp->tmpstatp); | |
902 | requestp->err = errno; | |
903 | } | |
904 | ||
595c7973 | 905 | int |
906 | squidaio_unlink(const char *path, squidaio_result_t * resultp) | |
907 | { | |
908 | squidaio_init(); | |
909 | squidaio_request_t *requestp; | |
910 | ||
911 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); | |
912 | ||
913 | requestp->path = squidaio_xstrdup(path); | |
914 | ||
915 | requestp->resultp = resultp; | |
916 | ||
917 | requestp->request_type = _AIO_OP_UNLINK; | |
918 | ||
919 | requestp->cancelled = 0; | |
920 | ||
921 | resultp->result_type = _AIO_OP_UNLINK; | |
922 | ||
923 | squidaio_queue_request(requestp); | |
924 | ||
925 | return 0; | |
926 | } | |
927 | ||
595c7973 | 928 | static void |
929 | squidaio_do_unlink(squidaio_request_t * requestp) | |
930 | { | |
931 | requestp->ret = unlink(requestp->path); | |
932 | requestp->err = errno; | |
933 | } | |
934 | ||
595c7973 | 935 | #if AIO_OPENDIR |
936 | /* XXX squidaio_opendir NOT implemented yet.. */ | |
937 | ||
938 | int | |
939 | squidaio_opendir(const char *path, squidaio_result_t * resultp) | |
940 | { | |
941 | squidaio_request_t *requestp; | |
942 | int len; | |
943 | ||
944 | requestp = squidaio_request_pool->alloc(); | |
945 | ||
946 | resultp->result_type = _AIO_OP_OPENDIR; | |
947 | ||
948 | return -1; | |
949 | } | |
950 | ||
951 | static void | |
952 | squidaio_do_opendir(squidaio_request_t * requestp) | |
953 | { | |
954 | /* NOT IMPLEMENTED */ | |
955 | } | |
956 | ||
957 | #endif | |
958 | ||
959 | static void | |
960 | squidaio_poll_queues(void) | |
961 | { | |
962 | /* kick "overflow" request queue */ | |
963 | ||
964 | if (request_queue2.head && | |
965 | (WaitForSingleObject(request_queue.mutex, 0 )== WAIT_OBJECT_0)) { | |
966 | *request_queue.tailp = request_queue2.head; | |
967 | request_queue.tailp = request_queue2.tailp; | |
968 | ||
969 | if (!SetEvent(request_queue.cond)) | |
970 | fatal("couldn't push queue\n"); | |
971 | ||
972 | if (!ReleaseMutex(request_queue.mutex)) { | |
973 | /* unexpected error */ | |
974 | } | |
975 | ||
976 | Sleep(0); | |
977 | request_queue2.head = NULL; | |
978 | request_queue2.tailp = &request_queue2.head; | |
979 | } | |
980 | ||
981 | /* poll done queue */ | |
982 | if (done_queue.head && | |
983 | (WaitForSingleObject(done_queue.mutex, 0)==WAIT_OBJECT_0)) { | |
984 | ||
985 | struct squidaio_request_t *requests = done_queue.head; | |
986 | done_queue.head = NULL; | |
987 | done_queue.tailp = &done_queue.head; | |
988 | ||
989 | if (!ReleaseMutex(done_queue.mutex)) { | |
990 | /* unexpected error */ | |
991 | } | |
992 | ||
993 | Sleep(0); | |
994 | *done_requests.tailp = requests; | |
995 | request_queue_len -= 1; | |
996 | ||
997 | while (requests->next) { | |
998 | requests = requests->next; | |
999 | request_queue_len -= 1; | |
1000 | } | |
1001 | ||
1002 | done_requests.tailp = &requests->next; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | squidaio_result_t * | |
1007 | squidaio_poll_done(void) | |
1008 | { | |
1009 | squidaio_request_t *request; | |
1010 | squidaio_result_t *resultp; | |
1011 | int cancelled; | |
1012 | int polled = 0; | |
1013 | ||
1014 | AIO_REPOLL: | |
1015 | request = done_requests.head; | |
1016 | ||
1017 | if (request == NULL && !polled) { | |
1018 | CommIO::ResetNotifications(); | |
1019 | squidaio_poll_queues(); | |
1020 | polled = 1; | |
1021 | request = done_requests.head; | |
1022 | } | |
1023 | ||
1024 | if (!request) { | |
1025 | return NULL; | |
1026 | } | |
1027 | ||
bf8fe701 | 1028 | debugs(43, 9, "squidaio_poll_done: " << request << " type=" << request->request_type << " result=" << request->resultp); |
595c7973 | 1029 | done_requests.head = request->next; |
1030 | ||
1031 | if (!done_requests.head) | |
1032 | done_requests.tailp = &done_requests.head; | |
1033 | ||
1034 | resultp = request->resultp; | |
1035 | ||
1036 | cancelled = request->cancelled; | |
1037 | ||
1038 | squidaio_debug(request); | |
1039 | ||
bf8fe701 | 1040 | debugs(43, 5, "DONE: " << request->ret << " -> " << request->err); |
595c7973 | 1041 | |
1042 | squidaio_cleanup_request(request); | |
1043 | ||
1044 | if (cancelled) | |
1045 | goto AIO_REPOLL; | |
1046 | ||
1047 | return resultp; | |
f53969cc | 1048 | } /* squidaio_poll_done */ |
595c7973 | 1049 | |
1050 | int | |
1051 | squidaio_operations_pending(void) | |
1052 | { | |
1053 | return request_queue_len + (done_requests.head ? 1 : 0); | |
1054 | } | |
1055 | ||
1056 | int | |
1057 | squidaio_sync(void) | |
1058 | { | |
1059 | /* XXX This might take a while if the queue is large.. */ | |
1060 | ||
1061 | do { | |
1062 | squidaio_poll_queues(); | |
1063 | } while (request_queue_len > 0); | |
1064 | ||
1065 | return squidaio_operations_pending(); | |
1066 | } | |
1067 | ||
1068 | int | |
1069 | squidaio_get_queue_len(void) | |
1070 | { | |
1071 | return request_queue_len; | |
1072 | } | |
1073 | ||
1074 | static void | |
1075 | squidaio_debug(squidaio_request_t * request) | |
1076 | { | |
1077 | switch (request->request_type) { | |
1078 | ||
1079 | case _AIO_OP_OPEN: | |
bf8fe701 | 1080 | debugs(43, 5, "OPEN of " << request->path << " to FD " << request->ret); |
595c7973 | 1081 | break; |
1082 | ||
1083 | case _AIO_OP_READ: | |
bf8fe701 | 1084 | debugs(43, 5, "READ on fd: " << request->fd); |
595c7973 | 1085 | break; |
1086 | ||
1087 | case _AIO_OP_WRITE: | |
bf8fe701 | 1088 | debugs(43, 5, "WRITE on fd: " << request->fd); |
595c7973 | 1089 | break; |
1090 | ||
1091 | case _AIO_OP_CLOSE: | |
bf8fe701 | 1092 | debugs(43, 5, "CLOSE of fd: " << request->fd); |
595c7973 | 1093 | break; |
1094 | ||
1095 | case _AIO_OP_UNLINK: | |
bf8fe701 | 1096 | debugs(43, 5, "UNLINK of " << request->path); |
595c7973 | 1097 | break; |
1098 | ||
595c7973 | 1099 | default: |
1100 | break; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | void | |
1105 | squidaio_stats(StoreEntry * sentry) | |
1106 | { | |
1107 | squidaio_thread_t *threadp; | |
1108 | int i; | |
1109 | ||
1110 | if (!squidaio_initialised) | |
1111 | return; | |
1112 | ||
1113 | storeAppendPrintf(sentry, "\n\nThreads Status:\n"); | |
1114 | ||
1115 | storeAppendPrintf(sentry, "#\tID\t# Requests\n"); | |
1116 | ||
1117 | threadp = threads; | |
1118 | ||
cb4185f1 | 1119 | for (i = 0; i < NUMTHREADS; ++i) { |
595c7973 | 1120 | storeAppendPrintf(sentry, "%i\t0x%lx\t%ld\n", i + 1, threadp->dwThreadId, threadp->requests); |
1121 | threadp = threadp->next; | |
1122 | } | |
1123 | } | |
f53969cc | 1124 |