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30a4f2a8 | 1 | /* |
262a0e14 | 2 | * $Id$ |
30a4f2a8 | 3 | * |
b510f3a1 | 4 | * DEBUG: section 06 Disk I/O Routines |
30a4f2a8 | 5 | * AUTHOR: Harvest Derived |
6 | * | |
2b6662ba | 7 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 8 | * ---------------------------------------------------------- |
30a4f2a8 | 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. | |
30a4f2a8 | 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 | * |
30a4f2a8 | 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 | * |
30a4f2a8 | 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 | |
cbdec147 | 31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 32 | * |
30a4f2a8 | 33 | */ |
ed43818f | 34 | |
582c2af2 | 35 | #include "squid.h" |
d841c88d | 36 | #include "comm/Loops.h" |
528b2c61 | 37 | #include "fde.h" |
0eb49b6d | 38 | #include "MemBuf.h" |
582c2af2 FC |
39 | #include "profiler/Profiler.h" |
40 | #include "protos.h" | |
e4f1fdae | 41 | #include "StatCounters.h" |
090089c4 | 42 | |
21d845b1 FC |
43 | #if HAVE_ERRNO_H |
44 | #include <errno.h> | |
45 | #endif | |
46 | ||
95d15928 | 47 | static PF diskHandleRead; |
48 | static PF diskHandleWrite; | |
24382924 | 49 | |
be266cb2 | 50 | #if _SQUID_WINDOWS_ || _SQUID_OS2_ |
1a94f598 | 51 | static int |
52 | diskWriteIsComplete(int fd) | |
53 | { | |
54 | return fd_table[fd].disk.write_q ? 0 : 1; | |
55 | } | |
62e76326 | 56 | |
1a94f598 | 57 | #endif |
58 | ||
04cece06 | 59 | void |
0673c0ba | 60 | disk_init(void) |
090089c4 | 61 | { |
60df005c | 62 | (void) 0; |
090089c4 | 63 | } |
64 | ||
59a09b98 FC |
65 | /* hack needed on SunStudio to avoid linkage convention mismatch */ |
66 | static void cxx_xfree(void *ptr) | |
67 | { | |
f673997d | 68 | xfree(ptr); |
59a09b98 FC |
69 | } |
70 | ||
1a94f598 | 71 | /* |
72 | * opens a disk file specified by 'path'. This function always | |
73 | * blocks! There is no callback. | |
74 | */ | |
684c2720 | 75 | int |
1a94f598 | 76 | file_open(const char *path, int mode) |
090089c4 | 77 | { |
090089c4 | 78 | int fd; |
88bfe092 | 79 | PROF_start(file_open); |
62e76326 | 80 | |
5d1a7121 | 81 | if (FILE_MODE(mode) == O_WRONLY) |
62e76326 | 82 | mode |= O_APPEND; |
83 | ||
b870e0b4 | 84 | errno = 0; |
62e76326 | 85 | |
0a0bf5db | 86 | fd = open(path, mode, 0644); |
62e76326 | 87 | |
95dc7ff4 | 88 | ++ statCounter.syscalls.disk.opens; |
62e76326 | 89 | |
0a0bf5db | 90 | if (fd < 0) { |
bf8fe701 | 91 | debugs(50, 3, "file_open: error opening file " << path << ": " << xstrerror()); |
62e76326 | 92 | fd = DISK_ERROR; |
2391a162 | 93 | } else { |
bf8fe701 | 94 | debugs(6, 5, "file_open: FD " << fd); |
62e76326 | 95 | commSetCloseOnExec(fd); |
96 | fd_open(fd, FD_FILE, path); | |
090089c4 | 97 | } |
62e76326 | 98 | |
88bfe092 | 99 | PROF_stop(file_open); |
2391a162 | 100 | return fd; |
0a0bf5db | 101 | } |
102 | ||
090089c4 | 103 | /* close a disk file. */ |
95d15928 | 104 | void |
b8d8561b | 105 | file_close(int fd) |
090089c4 | 106 | { |
76f87348 | 107 | fde *F = &fd_table[fd]; |
2391a162 | 108 | PF *read_callback; |
88bfe092 | 109 | PROF_start(file_close); |
25354045 | 110 | assert(fd >= 0); |
60c0b5a2 | 111 | assert(F->flags.open); |
62e76326 | 112 | |
2391a162 | 113 | if ((read_callback = F->read_handler)) { |
62e76326 | 114 | F->read_handler = NULL; |
115 | read_callback(-1, F->read_data); | |
65d548bf | 116 | } |
62e76326 | 117 | |
0cd30ba5 | 118 | if (F->flags.write_daemon) { |
be266cb2 | 119 | #if _SQUID_WINDOWS_ || _SQUID_OS2_ |
62e76326 | 120 | /* |
121 | * on some operating systems, you can not delete or rename | |
122 | * open files, so we won't allow delayed close. | |
123 | */ | |
62e76326 | 124 | while (!diskWriteIsComplete(fd)) |
125 | diskHandleWrite(fd, NULL); | |
cd377065 | 126 | #else |
62e76326 | 127 | F->flags.close_request = 1; |
bf8fe701 | 128 | debugs(6, 2, "file_close: FD " << fd << ", delaying close"); |
62e76326 | 129 | PROF_stop(file_close); |
62e76326 | 130 | return; |
cd377065 | 131 | #endif |
62e76326 | 132 | |
fb247d78 | 133 | } |
62e76326 | 134 | |
65d548bf | 135 | /* |
136 | * Assert there is no write callback. Otherwise we might be | |
137 | * leaking write state data by closing the descriptor | |
138 | */ | |
139 | assert(F->write_handler == NULL); | |
62e76326 | 140 | |
42f99d0d | 141 | #if CALL_FSYNC_BEFORE_CLOSE |
62e76326 | 142 | |
42f99d0d | 143 | fsync(fd); |
62e76326 | 144 | |
42f99d0d | 145 | #endif |
62e76326 | 146 | |
95d15928 | 147 | close(fd); |
62e76326 | 148 | |
bf8fe701 | 149 | debugs(6, F->flags.close_request ? 2 : 5, "file_close: FD " << fd << " really closing\n"); |
62e76326 | 150 | |
6cf028ab | 151 | fd_close(fd); |
62e76326 | 152 | |
95dc7ff4 | 153 | ++ statCounter.syscalls.disk.closes; |
62e76326 | 154 | |
88bfe092 | 155 | PROF_stop(file_close); |
090089c4 | 156 | } |
157 | ||
f02b8498 | 158 | /* |
159 | * This function has the purpose of combining multiple writes. This is | |
160 | * to facilitate the ASYNC_IO option since it can only guarantee 1 | |
161 | * write to a file per trip around the comm.c select() loop. That's bad | |
162 | * because more than 1 write can be made to the access.log file per | |
163 | * trip, and so this code is purely designed to help batch multiple | |
164 | * sequential writes to the access.log file. Squid will never issue | |
165 | * multiple writes for any other file type during 1 trip around the | |
166 | * select() loop. --SLF | |
167 | */ | |
582b6456 | 168 | static void |
f02b8498 | 169 | diskCombineWrites(struct _fde_disk *fdd) |
090089c4 | 170 | { |
f02b8498 | 171 | /* |
172 | * We need to combine multiple write requests on an FD's write | |
173 | * queue But only if we don't need to seek() in between them, ugh! | |
174 | * XXX This currently ignores any seeks (file_offset) | |
175 | */ | |
62e76326 | 176 | |
26ac0430 | 177 | if (fdd->write_q != NULL && fdd->write_q->next != NULL) { |
b115733c | 178 | int len = 0; |
62e76326 | 179 | |
b115733c | 180 | for (dwrite_q *q = fdd->write_q; q != NULL; q = q->next) |
62e76326 | 181 | len += q->len - q->buf_offset; |
182 | ||
b115733c | 183 | dwrite_q *wq = (dwrite_q *)memAllocate(MEM_DWRITE_Q); |
62e76326 | 184 | |
185 | wq->buf = (char *)xmalloc(len); | |
186 | ||
187 | wq->len = 0; | |
188 | ||
189 | wq->buf_offset = 0; | |
190 | ||
191 | wq->next = NULL; | |
192 | ||
59a09b98 | 193 | wq->free_func = cxx_xfree; |
62e76326 | 194 | |
b115733c AJ |
195 | while (fdd->write_q != NULL) { |
196 | dwrite_q *q = fdd->write_q; | |
197 | ||
62e76326 | 198 | len = q->len - q->buf_offset; |
41d00cd3 | 199 | memcpy(wq->buf + wq->len, q->buf + q->buf_offset, len); |
62e76326 | 200 | wq->len += len; |
201 | fdd->write_q = q->next; | |
202 | ||
203 | if (q->free_func) | |
6ca34f6f | 204 | q->free_func(q->buf); |
62e76326 | 205 | |
b115733c AJ |
206 | memFree(q, MEM_DWRITE_Q); |
207 | }; | |
62e76326 | 208 | |
209 | fdd->write_q_tail = wq; | |
210 | ||
211 | fdd->write_q = wq; | |
0a0bf5db | 212 | } |
f02b8498 | 213 | } |
214 | ||
215 | /* write handler */ | |
216 | static void | |
217 | diskHandleWrite(int fd, void *notused) | |
218 | { | |
219 | int len = 0; | |
f02b8498 | 220 | fde *F = &fd_table[fd]; |
62e76326 | 221 | |
f02b8498 | 222 | struct _fde_disk *fdd = &F->disk; |
2391a162 | 223 | dwrite_q *q = fdd->write_q; |
224 | int status = DISK_OK; | |
2391a162 | 225 | int do_close; |
62e76326 | 226 | |
2391a162 | 227 | if (NULL == q) |
62e76326 | 228 | return; |
229 | ||
88bfe092 | 230 | PROF_start(diskHandleWrite); |
62e76326 | 231 | |
bf8fe701 | 232 | debugs(6, 3, "diskHandleWrite: FD " << fd); |
62e76326 | 233 | |
2391a162 | 234 | F->flags.write_daemon = 0; |
62e76326 | 235 | |
8350fe9b | 236 | assert(fdd->write_q != NULL); |
62e76326 | 237 | |
d377699f | 238 | assert(fdd->write_q->len > fdd->write_q->buf_offset); |
62e76326 | 239 | |
e2851fe7 AR |
240 | debugs(6, 3, "diskHandleWrite: FD " << fd << " writing " << |
241 | (fdd->write_q->len - fdd->write_q->buf_offset) << " bytes at " << | |
242 | fdd->write_q->file_offset); | |
62e76326 | 243 | |
b870e0b4 | 244 | errno = 0; |
62e76326 | 245 | |
cd748f27 | 246 | if (fdd->write_q->file_offset != -1) |
e2851fe7 | 247 | lseek(fd, fdd->write_q->file_offset, SEEK_SET); /* XXX ignore return? */ |
62e76326 | 248 | |
1f7c9178 | 249 | len = FD_WRITE_METHOD(fd, |
62e76326 | 250 | fdd->write_q->buf + fdd->write_q->buf_offset, |
251 | fdd->write_q->len - fdd->write_q->buf_offset); | |
252 | ||
bf8fe701 | 253 | debugs(6, 3, "diskHandleWrite: FD " << fd << " len = " << len); |
62e76326 | 254 | |
95dc7ff4 | 255 | ++ statCounter.syscalls.disk.writes; |
62e76326 | 256 | |
6cf028ab | 257 | fd_bytes(fd, len, FD_WRITE); |
62e76326 | 258 | |
0a0bf5db | 259 | if (len < 0) { |
62e76326 | 260 | if (!ignoreErrno(errno)) { |
261 | status = errno == ENOSPC ? DISK_NO_SPACE_LEFT : DISK_ERROR; | |
e0236918 | 262 | debugs(50, DBG_IMPORTANT, "diskHandleWrite: FD " << fd << ": disk write error: " << xstrerror()); |
bf8fe701 | 263 | |
62e76326 | 264 | /* |
265 | * If there is no write callback, then this file is | |
266 | * most likely something important like a log file, or | |
267 | * an interprocess pipe. Its not a swapfile. We feel | |
268 | * that a write failure on a log file is rather important, | |
269 | * and Squid doesn't otherwise deal with this condition. | |
270 | * So to get the administrators attention, we exit with | |
271 | * a fatal message. | |
272 | */ | |
273 | ||
274 | if (fdd->wrt_handle == NULL) | |
275 | fatal("Write failure -- check your disk space and cache.log"); | |
276 | ||
277 | /* | |
278 | * If there is a write failure, then we notify the | |
279 | * upper layer via the callback, at the end of this | |
280 | * function. Meanwhile, flush all pending buffers | |
281 | * here. Let the upper layer decide how to handle the | |
282 | * failure. This will prevent experiencing multiple, | |
283 | * repeated write failures for the same FD because of | |
284 | * the queued data. | |
285 | */ | |
286 | do { | |
287 | fdd->write_q = q->next; | |
288 | ||
289 | if (q->free_func) | |
6ca34f6f | 290 | q->free_func(q->buf); |
62e76326 | 291 | |
292 | if (q) { | |
293 | memFree(q, MEM_DWRITE_Q); | |
294 | q = NULL; | |
295 | } | |
296 | } while ((q = fdd->write_q)); | |
297 | } | |
298 | ||
299 | len = 0; | |
0a0bf5db | 300 | } |
62e76326 | 301 | |
8350fe9b | 302 | if (q != NULL) { |
62e76326 | 303 | /* q might become NULL from write failure above */ |
304 | q->buf_offset += len; | |
305 | ||
306 | if (q->buf_offset > q->len) | |
e0236918 | 307 | debugs(50, DBG_IMPORTANT, "diskHandleWriteComplete: q->buf_offset > q->len (" << |
bf8fe701 | 308 | q << "," << (int) q->buf_offset << ", " << q->len << ", " << |
309 | len << " FD " << fd << ")"); | |
310 | ||
62e76326 | 311 | assert(q->buf_offset <= q->len); |
312 | ||
313 | if (q->buf_offset == q->len) { | |
314 | /* complete write */ | |
315 | fdd->write_q = q->next; | |
316 | ||
317 | if (q->free_func) | |
6ca34f6f | 318 | q->free_func(q->buf); |
62e76326 | 319 | |
320 | if (q) { | |
321 | memFree(q, MEM_DWRITE_Q); | |
322 | q = NULL; | |
323 | } | |
324 | } | |
090089c4 | 325 | } |
62e76326 | 326 | |
de866d20 | 327 | if (fdd->write_q == NULL) { |
62e76326 | 328 | /* no more data */ |
329 | fdd->write_q_tail = NULL; | |
de866d20 | 330 | } else { |
62e76326 | 331 | /* another block is queued */ |
332 | diskCombineWrites(fdd); | |
d841c88d | 333 | Comm::SetSelect(fd, COMM_SELECT_WRITE, diskHandleWrite, NULL, 0); |
62e76326 | 334 | F->flags.write_daemon = 1; |
4a86108c | 335 | } |
62e76326 | 336 | |
0cd30ba5 | 337 | do_close = F->flags.close_request; |
62e76326 | 338 | |
25354045 | 339 | if (fdd->wrt_handle) { |
62e76326 | 340 | DWCB *callback = fdd->wrt_handle; |
341 | void *cbdata; | |
342 | fdd->wrt_handle = NULL; | |
343 | ||
344 | if (cbdataReferenceValidDone(fdd->wrt_handle_data, &cbdata)) { | |
345 | callback(fd, status, len, cbdata); | |
346 | /* | |
347 | * NOTE, this callback can close the FD, so we must | |
348 | * not touch 'F', 'fdd', etc. after this. | |
349 | */ | |
350 | PROF_stop(diskHandleWrite); | |
351 | return; | |
352 | /* XXX But what about close_request??? */ | |
353 | } | |
25354045 | 354 | } |
62e76326 | 355 | |
68c21f71 | 356 | if (do_close) |
62e76326 | 357 | file_close(fd); |
358 | ||
88bfe092 | 359 | PROF_stop(diskHandleWrite); |
090089c4 | 360 | } |
361 | ||
090089c4 | 362 | /* write block to a file */ |
363 | /* write back queue. Only one writer at a time. */ | |
364 | /* call a handle when writing is complete. */ | |
e3ef2b09 | 365 | void |
3ebcfaa1 | 366 | file_write(int fd, |
62e76326 | 367 | off_t file_offset, |
368 | void const *ptr_to_buf, | |
369 | int len, | |
370 | DWCB * handle, | |
371 | void *handle_data, | |
372 | FREE * free_func) | |
090089c4 | 373 | { |
c6ac7aae | 374 | dwrite_q *wq = NULL; |
48cc3fcf | 375 | fde *F = &fd_table[fd]; |
88bfe092 | 376 | PROF_start(file_write); |
48cc3fcf | 377 | assert(fd >= 0); |
60c0b5a2 | 378 | assert(F->flags.open); |
090089c4 | 379 | /* if we got here. Caller is eligible to write. */ |
e6ccf245 | 380 | wq = (dwrite_q *)memAllocate(MEM_DWRITE_Q); |
d377699f | 381 | wq->file_offset = file_offset; |
e6ccf245 | 382 | wq->buf = (char *)ptr_to_buf; |
090089c4 | 383 | wq->len = len; |
d377699f | 384 | wq->buf_offset = 0; |
090089c4 | 385 | wq->next = NULL; |
ed7f0b6a | 386 | wq->free_func = free_func; |
62e76326 | 387 | |
fa80a8ef | 388 | if (!F->disk.wrt_handle_data) { |
62e76326 | 389 | F->disk.wrt_handle = handle; |
390 | F->disk.wrt_handle_data = cbdataReference(handle_data); | |
fa80a8ef | 391 | } else { |
62e76326 | 392 | /* Detect if there is multiple concurrent users of this fd.. we only support one callback */ |
393 | assert(F->disk.wrt_handle_data == handle_data && F->disk.wrt_handle == handle); | |
fa80a8ef | 394 | } |
62e76326 | 395 | |
090089c4 | 396 | /* add to queue */ |
48cc3fcf | 397 | if (F->disk.write_q == NULL) { |
62e76326 | 398 | /* empty queue */ |
399 | F->disk.write_q = F->disk.write_q_tail = wq; | |
090089c4 | 400 | } else { |
62e76326 | 401 | F->disk.write_q_tail->next = wq; |
402 | F->disk.write_q_tail = wq; | |
090089c4 | 403 | } |
62e76326 | 404 | |
0cd30ba5 | 405 | if (!F->flags.write_daemon) { |
62e76326 | 406 | diskHandleWrite(fd, NULL); |
429fdbec | 407 | } |
62e76326 | 408 | |
88bfe092 | 409 | PROF_stop(file_write); |
090089c4 | 410 | } |
411 | ||
23b2b404 | 412 | /* |
413 | * a wrapper around file_write to allow for MemBuf to be file_written | |
414 | * in a snap | |
415 | */ | |
137ee196 | 416 | void |
417 | file_write_mbuf(int fd, off_t off, MemBuf mb, DWCB * handler, void *handler_data) | |
418 | { | |
2fe7eff9 | 419 | file_write(fd, off, mb.buf, mb.size, handler, handler_data, mb.freeFunc()); |
137ee196 | 420 | } |
090089c4 | 421 | |
422 | /* Read from FD */ | |
582b6456 | 423 | static void |
424 | diskHandleRead(int fd, void *data) | |
090089c4 | 425 | { |
e6ccf245 | 426 | dread_ctrl *ctrl_dat = (dread_ctrl *)data; |
edd2eb63 | 427 | fde *F = &fd_table[fd]; |
090089c4 | 428 | int len; |
2391a162 | 429 | int rc = DISK_OK; |
65d548bf | 430 | /* |
431 | * FD < 0 indicates premature close; we just have to free | |
432 | * the state data. | |
433 | */ | |
62e76326 | 434 | |
65d548bf | 435 | if (fd < 0) { |
62e76326 | 436 | memFree(ctrl_dat, MEM_DREAD_CTRL); |
437 | return; | |
65d548bf | 438 | } |
62e76326 | 439 | |
88bfe092 | 440 | PROF_start(diskHandleRead); |
62e76326 | 441 | |
034b5ea4 | 442 | #if WRITES_MAINTAIN_DISK_OFFSET |
711982d8 | 443 | if (F->disk.offset != ctrl_dat->offset) { |
034b5ea4 AR |
444 | #else |
445 | { | |
446 | #endif | |
4a7a3d56 | 447 | debugs(6, 3, "diskHandleRead: FD " << fd << " seeking to offset " << ctrl_dat->offset); |
62e76326 | 448 | lseek(fd, ctrl_dat->offset, SEEK_SET); /* XXX ignore return? */ |
95dc7ff4 | 449 | ++ statCounter.syscalls.disk.seeks; |
62e76326 | 450 | F->disk.offset = ctrl_dat->offset; |
711982d8 | 451 | } |
62e76326 | 452 | |
b870e0b4 | 453 | errno = 0; |
1f7c9178 | 454 | len = FD_READ_METHOD(fd, ctrl_dat->buf, ctrl_dat->req_len); |
62e76326 | 455 | |
015b507a | 456 | if (len > 0) |
62e76326 | 457 | F->disk.offset += len; |
458 | ||
95dc7ff4 | 459 | ++ statCounter.syscalls.disk.reads; |
62e76326 | 460 | |
4f92c80c | 461 | fd_bytes(fd, len, FD_READ); |
62e76326 | 462 | |
0a0bf5db | 463 | if (len < 0) { |
62e76326 | 464 | if (ignoreErrno(errno)) { |
d841c88d | 465 | Comm::SetSelect(fd, COMM_SELECT_READ, diskHandleRead, ctrl_dat, 0); |
62e76326 | 466 | PROF_stop(diskHandleRead); |
467 | return; | |
468 | } | |
469 | ||
e0236918 | 470 | debugs(50, DBG_IMPORTANT, "diskHandleRead: FD " << fd << ": " << xstrerror()); |
62e76326 | 471 | len = 0; |
472 | rc = DISK_ERROR; | |
090089c4 | 473 | } else if (len == 0) { |
62e76326 | 474 | rc = DISK_EOF; |
090089c4 | 475 | } |
62e76326 | 476 | |
fa80a8ef | 477 | if (cbdataReferenceValid(ctrl_dat->client_data)) |
62e76326 | 478 | ctrl_dat->handler(fd, ctrl_dat->buf, len, rc, ctrl_dat->client_data); |
479 | ||
fa80a8ef | 480 | cbdataReferenceDone(ctrl_dat->client_data); |
62e76326 | 481 | |
db1cd23c | 482 | memFree(ctrl_dat, MEM_DREAD_CTRL); |
62e76326 | 483 | |
88bfe092 | 484 | PROF_stop(diskHandleRead); |
090089c4 | 485 | } |
486 | ||
090089c4 | 487 | /* start read operation */ |
62e76326 | 488 | /* buffer must be allocated from the caller. |
26ac0430 | 489 | * It must have at least req_len space in there. |
090089c4 | 490 | * call handler when a reading is complete. */ |
2391a162 | 491 | void |
d377699f | 492 | file_read(int fd, char *buf, int req_len, off_t offset, DRCB * handler, void *client_data) |
090089c4 | 493 | { |
494 | dread_ctrl *ctrl_dat; | |
88bfe092 | 495 | PROF_start(file_read); |
711982d8 | 496 | assert(fd >= 0); |
e6ccf245 | 497 | ctrl_dat = (dread_ctrl *)memAllocate(MEM_DREAD_CTRL); |
090089c4 | 498 | ctrl_dat->fd = fd; |
499 | ctrl_dat->offset = offset; | |
500 | ctrl_dat->req_len = req_len; | |
501 | ctrl_dat->buf = buf; | |
090089c4 | 502 | ctrl_dat->end_of_file = 0; |
503 | ctrl_dat->handler = handler; | |
fa80a8ef | 504 | ctrl_dat->client_data = cbdataReference(client_data); |
0a0bf5db | 505 | diskHandleRead(fd, ctrl_dat); |
88bfe092 | 506 | PROF_stop(file_read); |
090089c4 | 507 | } |
c8f4eac4 | 508 | |
509 | void | |
510 | safeunlink(const char *s, int quiet) | |
511 | { | |
95dc7ff4 | 512 | ++ statCounter.syscalls.disk.unlinks; |
c8f4eac4 | 513 | |
514 | if (unlink(s) < 0 && !quiet) | |
e0236918 | 515 | debugs(50, DBG_IMPORTANT, "safeunlink: Couldn't delete " << s << ": " << xstrerror()); |
c8f4eac4 | 516 | } |
517 | ||
518 | /* | |
519 | * Same as rename(2) but complains if something goes wrong; | |
26ac0430 | 520 | * the caller is responsible for handing and explaining the |
c8f4eac4 | 521 | * consequences of errors. |
522 | */ | |
523 | int | |
524 | xrename(const char *from, const char *to) | |
525 | { | |
bf8fe701 | 526 | debugs(21, 2, "xrename: renaming " << from << " to " << to); |
be266cb2 | 527 | #if _SQUID_OS2_ || _SQUID_WINDOWS_ |
6ca34f6f | 528 | remove(to); |
c8f4eac4 | 529 | #endif |
530 | ||
531 | if (0 == rename(from, to)) | |
532 | return 0; | |
533 | ||
bf8fe701 | 534 | debugs(21, errno == ENOENT ? 2 : 1, "xrename: Cannot rename " << from << " to " << to << ": " << xstrerror()); |
c8f4eac4 | 535 | |
536 | return -1; | |
537 | } | |
538 |