]> git.proxmox.com Git - mirror_qemu.git/blob - block/raw-posix.c
projects / mirror_qemu.git / blob
? search:


985bf69e5091d02c26c3ac645b31365c4f69c5ac
[mirror_qemu.git] / block / raw-posix.c
1 /*
2 * Block driver for RAW files (posix)
3 *
4 * Copyright (c) 2006 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "qemu-timer.h"
26 #include "qemu-char.h"
27 #include "block_int.h"
28 #include "module.h"
29 #ifdef CONFIG_AIO
30 #include "posix-aio-compat.h"
31 #endif
32
33 #ifdef CONFIG_COCOA
34 #include <paths.h>
35 #include <sys/param.h>
36 #include <IOKit/IOKitLib.h>
37 #include <IOKit/IOBSD.h>
38 #include <IOKit/storage/IOMediaBSDClient.h>
39 #include <IOKit/storage/IOMedia.h>
40 #include <IOKit/storage/IOCDMedia.h>
41 //#include <IOKit/storage/IOCDTypes.h>
42 #include <CoreFoundation/CoreFoundation.h>
43 #endif
44
45 #ifdef __sun__
46 #define _POSIX_PTHREAD_SEMANTICS 1
47 #include <signal.h>
48 #include <sys/dkio.h>
49 #endif
50 #ifdef __linux__
51 #include <sys/ioctl.h>
52 #include <linux/cdrom.h>
53 #include <linux/fd.h>
54 #endif
55 #ifdef __FreeBSD__
56 #include <signal.h>
57 #include <sys/disk.h>
58 #include <sys/cdio.h>
59 #endif
60
61 #ifdef __OpenBSD__
62 #include <sys/ioctl.h>
63 #include <sys/disklabel.h>
64 #include <sys/dkio.h>
65 #endif
66
67 #ifdef __DragonFly__
68 #include <sys/ioctl.h>
69 #include <sys/diskslice.h>
70 #endif
71
72 //#define DEBUG_FLOPPY
73
74 //#define DEBUG_BLOCK
75 #if defined(DEBUG_BLOCK)
76 #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \
77 { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0)
78 #else
79 #define DEBUG_BLOCK_PRINT(formatCstr, ...)
80 #endif
81
82 /* OS X does not have O_DSYNC */
83 #ifndef O_DSYNC
84 #define O_DSYNC O_SYNC
85 #endif
86
87 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
88 #ifndef O_DIRECT
89 #define O_DIRECT O_DSYNC
90 #endif
91
92 #define FTYPE_FILE 0
93 #define FTYPE_CD 1
94 #define FTYPE_FD 2
95
96 #define ALIGNED_BUFFER_SIZE (32 * 512)
97
98 /* if the FD is not accessed during that time (in ms), we try to
99 reopen it to see if the disk has been changed */
100 #define FD_OPEN_TIMEOUT 1000
101
102 typedef struct BDRVRawState {
103 int fd;
104 int type;
105 unsigned int lseek_err_cnt;
106 int open_flags;
107 #if defined(__linux__)
108 /* linux floppy specific */
109 int64_t fd_open_time;
110 int64_t fd_error_time;
111 int fd_got_error;
112 int fd_media_changed;
113 #endif
114 uint8_t* aligned_buf;
115 } BDRVRawState;
116
117 static int posix_aio_init(void);
118
119 static int fd_open(BlockDriverState *bs);
120 static int64_t raw_getlength(BlockDriverState *bs);
121
122 #if defined(__FreeBSD__)
123 static int cdrom_reopen(BlockDriverState *bs);
124 #endif
125
126 static int raw_open_common(BlockDriverState *bs, const char *filename,
127 int bdrv_flags, int open_flags)
128 {
129 BDRVRawState *s = bs->opaque;
130 int fd, ret;
131
132 posix_aio_init();
133
134 s->lseek_err_cnt = 0;
135
136 s->open_flags = open_flags | O_BINARY;
137 s->open_flags &= ~O_ACCMODE;
138 if ((bdrv_flags & BDRV_O_ACCESS) == BDRV_O_RDWR) {
139 s->open_flags |= O_RDWR;
140 } else {
141 s->open_flags |= O_RDONLY;
142 bs->read_only = 1;
143 }
144
145 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
146 * and O_DIRECT for no caching. */
147 if ((bdrv_flags & BDRV_O_NOCACHE))
148 s->open_flags |= O_DIRECT;
149 else if (!(bdrv_flags & BDRV_O_CACHE_WB))
150 s->open_flags |= O_DSYNC;
151
152 s->fd = -1;
153 fd = open(filename, s->open_flags, 0644);
154 if (fd < 0) {
155 ret = -errno;
156 if (ret == -EROFS)
157 ret = -EACCES;
158 return ret;
159 }
160 s->fd = fd;
161 s->aligned_buf = NULL;
162 if ((bdrv_flags & BDRV_O_NOCACHE)) {
163 s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
164 if (s->aligned_buf == NULL) {
165 ret = -errno;
166 close(fd);
167 return ret;
168 }
169 }
170 return 0;
171 }
172
173 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
174 {
175 BDRVRawState *s = bs->opaque;
176 int open_flags = 0;
177
178 s->type = FTYPE_FILE;
179 if (flags & BDRV_O_CREAT)
180 open_flags = O_CREAT | O_TRUNC;
181
182 return raw_open_common(bs, filename, flags, open_flags);
183 }
184
185 /* XXX: use host sector size if necessary with:
186 #ifdef DIOCGSECTORSIZE
187 {
188 unsigned int sectorsize = 512;
189 if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
190 sectorsize > bufsize)
191 bufsize = sectorsize;
192 }
193 #endif
194 #ifdef CONFIG_COCOA
195 u_int32_t blockSize = 512;
196 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
197 bufsize = blockSize;
198 }
199 #endif
200 */
201
202 /*
203 * offset and count are in bytes, but must be multiples of 512 for files
204 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
205 *
206 * This function may be called without alignment if the caller ensures
207 * that O_DIRECT is not in effect.
208 */
209 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
210 uint8_t *buf, int count)
211 {
212 BDRVRawState *s = bs->opaque;
213 int ret;
214
215 ret = fd_open(bs);
216 if (ret < 0)
217 return ret;
218
219 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
220 ++(s->lseek_err_cnt);
221 if(s->lseek_err_cnt <= 10) {
222 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
223 "] lseek failed : %d = %s\n",
224 s->fd, bs->filename, offset, buf, count,
225 bs->total_sectors, errno, strerror(errno));
226 }
227 return -1;
228 }
229 s->lseek_err_cnt=0;
230
231 ret = read(s->fd, buf, count);
232 if (ret == count)
233 goto label__raw_read__success;
234
235 /* Allow reads beyond the end (needed for pwrite) */
236 if ((ret == 0) && bs->growable) {
237 int64_t size = raw_getlength(bs);
238 if (offset >= size) {
239 memset(buf, 0, count);
240 ret = count;
241 goto label__raw_read__success;
242 }
243 }
244
245 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
246 "] read failed %d : %d = %s\n",
247 s->fd, bs->filename, offset, buf, count,
248 bs->total_sectors, ret, errno, strerror(errno));
249
250 /* Try harder for CDrom. */
251 if (bs->type == BDRV_TYPE_CDROM) {
252 lseek(s->fd, offset, SEEK_SET);
253 ret = read(s->fd, buf, count);
254 if (ret == count)
255 goto label__raw_read__success;
256 lseek(s->fd, offset, SEEK_SET);
257 ret = read(s->fd, buf, count);
258 if (ret == count)
259 goto label__raw_read__success;
260
261 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
262 "] retry read failed %d : %d = %s\n",
263 s->fd, bs->filename, offset, buf, count,
264 bs->total_sectors, ret, errno, strerror(errno));
265 }
266
267 label__raw_read__success:
268
269 return (ret < 0) ? -errno : ret;
270 }
271
272 /*
273 * offset and count are in bytes, but must be multiples of 512 for files
274 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
275 *
276 * This function may be called without alignment if the caller ensures
277 * that O_DIRECT is not in effect.
278 */
279 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
280 const uint8_t *buf, int count)
281 {
282 BDRVRawState *s = bs->opaque;
283 int ret;
284
285 ret = fd_open(bs);
286 if (ret < 0)
287 return -errno;
288
289 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
290 ++(s->lseek_err_cnt);
291 if(s->lseek_err_cnt) {
292 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
293 PRId64 "] lseek failed : %d = %s\n",
294 s->fd, bs->filename, offset, buf, count,
295 bs->total_sectors, errno, strerror(errno));
296 }
297 return -EIO;
298 }
299 s->lseek_err_cnt = 0;
300
301 ret = write(s->fd, buf, count);
302 if (ret == count)
303 goto label__raw_write__success;
304
305 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
306 "] write failed %d : %d = %s\n",
307 s->fd, bs->filename, offset, buf, count,
308 bs->total_sectors, ret, errno, strerror(errno));
309
310 label__raw_write__success:
311
312 return (ret < 0) ? -errno : ret;
313 }
314
315
316 /*
317 * offset and count are in bytes and possibly not aligned. For files opened
318 * with O_DIRECT, necessary alignments are ensured before calling
319 * raw_pread_aligned to do the actual read.
320 */
321 static int raw_pread(BlockDriverState *bs, int64_t offset,
322 uint8_t *buf, int count)
323 {
324 BDRVRawState *s = bs->opaque;
325 int size, ret, shift, sum;
326
327 sum = 0;
328
329 if (s->aligned_buf != NULL) {
330
331 if (offset & 0x1ff) {
332 /* align offset on a 512 bytes boundary */
333
334 shift = offset & 0x1ff;
335 size = (shift + count + 0x1ff) & ~0x1ff;
336 if (size > ALIGNED_BUFFER_SIZE)
337 size = ALIGNED_BUFFER_SIZE;
338 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
339 if (ret < 0)
340 return ret;
341
342 size = 512 - shift;
343 if (size > count)
344 size = count;
345 memcpy(buf, s->aligned_buf + shift, size);
346
347 buf += size;
348 offset += size;
349 count -= size;
350 sum += size;
351
352 if (count == 0)
353 return sum;
354 }
355 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
356
357 /* read on aligned buffer */
358
359 while (count) {
360
361 size = (count + 0x1ff) & ~0x1ff;
362 if (size > ALIGNED_BUFFER_SIZE)
363 size = ALIGNED_BUFFER_SIZE;
364
365 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
366 if (ret < 0)
367 return ret;
368
369 size = ret;
370 if (size > count)
371 size = count;
372
373 memcpy(buf, s->aligned_buf, size);
374
375 buf += size;
376 offset += size;
377 count -= size;
378 sum += size;
379 }
380
381 return sum;
382 }
383 }
384
385 return raw_pread_aligned(bs, offset, buf, count) + sum;
386 }
387
388 static int raw_read(BlockDriverState *bs, int64_t sector_num,
389 uint8_t *buf, int nb_sectors)
390 {
391 int ret;
392
393 ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
394 if (ret == (nb_sectors * 512))
395 ret = 0;
396 return ret;
397 }
398
399 /*
400 * offset and count are in bytes and possibly not aligned. For files opened
401 * with O_DIRECT, necessary alignments are ensured before calling
402 * raw_pwrite_aligned to do the actual write.
403 */
404 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
405 const uint8_t *buf, int count)
406 {
407 BDRVRawState *s = bs->opaque;
408 int size, ret, shift, sum;
409
410 sum = 0;
411
412 if (s->aligned_buf != NULL) {
413
414 if (offset & 0x1ff) {
415 /* align offset on a 512 bytes boundary */
416 shift = offset & 0x1ff;
417 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
418 if (ret < 0)
419 return ret;
420
421 size = 512 - shift;
422 if (size > count)
423 size = count;
424 memcpy(s->aligned_buf + shift, buf, size);
425
426 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
427 if (ret < 0)
428 return ret;
429
430 buf += size;
431 offset += size;
432 count -= size;
433 sum += size;
434
435 if (count == 0)
436 return sum;
437 }
438 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
439
440 while ((size = (count & ~0x1ff)) != 0) {
441
442 if (size > ALIGNED_BUFFER_SIZE)
443 size = ALIGNED_BUFFER_SIZE;
444
445 memcpy(s->aligned_buf, buf, size);
446
447 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
448 if (ret < 0)
449 return ret;
450
451 buf += ret;
452 offset += ret;
453 count -= ret;
454 sum += ret;
455 }
456 /* here, count < 512 because (count & ~0x1ff) == 0 */
457 if (count) {
458 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
459 if (ret < 0)
460 return ret;
461 memcpy(s->aligned_buf, buf, count);
462
463 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
464 if (ret < 0)
465 return ret;
466 if (count < ret)
467 ret = count;
468
469 sum += ret;
470 }
471 return sum;
472 }
473 }
474 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
475 }
476
477 static int raw_write(BlockDriverState *bs, int64_t sector_num,
478 const uint8_t *buf, int nb_sectors)
479 {
480 int ret;
481 ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
482 if (ret == (nb_sectors * 512))
483 ret = 0;
484 return ret;
485 }
486
487 #ifdef CONFIG_AIO
488 /***********************************************************/
489 /* Unix AIO using POSIX AIO */
490
491 typedef struct RawAIOCB {
492 BlockDriverAIOCB common;
493 struct qemu_paiocb aiocb;
494 struct RawAIOCB *next;
495 int ret;
496 } RawAIOCB;
497
498 typedef struct PosixAioState
499 {
500 int rfd, wfd;
501 RawAIOCB *first_aio;
502 } PosixAioState;
503
504 static void posix_aio_read(void *opaque)
505 {
506 PosixAioState *s = opaque;
507 RawAIOCB *acb, **pacb;
508 int ret;
509 ssize_t len;
510
511 /* read all bytes from signal pipe */
512 for (;;) {
513 char bytes[16];
514
515 len = read(s->rfd, bytes, sizeof(bytes));
516 if (len == -1 && errno == EINTR)
517 continue; /* try again */
518 if (len == sizeof(bytes))
519 continue; /* more to read */
520 break;
521 }
522
523 for(;;) {
524 pacb = &s->first_aio;
525 for(;;) {
526 acb = *pacb;
527 if (!acb)
528 goto the_end;
529 ret = qemu_paio_error(&acb->aiocb);
530 if (ret == ECANCELED) {
531 /* remove the request */
532 *pacb = acb->next;
533 qemu_aio_release(acb);
534 } else if (ret != EINPROGRESS) {
535 /* end of aio */
536 if (ret == 0) {
537 ret = qemu_paio_return(&acb->aiocb);
538 if (ret == acb->aiocb.aio_nbytes)
539 ret = 0;
540 else
541 ret = -EINVAL;
542 } else {
543 ret = -ret;
544 }
545 /* remove the request */
546 *pacb = acb->next;
547 /* call the callback */
548 acb->common.cb(acb->common.opaque, ret);
549 qemu_aio_release(acb);
550 break;
551 } else {
552 pacb = &acb->next;
553 }
554 }
555 }
556 the_end: ;
557 }
558
559 static int posix_aio_flush(void *opaque)
560 {
561 PosixAioState *s = opaque;
562 return !!s->first_aio;
563 }
564
565 static PosixAioState *posix_aio_state;
566
567 static void aio_signal_handler(int signum)
568 {
569 if (posix_aio_state) {
570 char byte = 0;
571
572 write(posix_aio_state->wfd, &byte, sizeof(byte));
573 }
574
575 qemu_service_io();
576 }
577
578 static int posix_aio_init(void)
579 {
580 struct sigaction act;
581 PosixAioState *s;
582 int fds[2];
583 struct qemu_paioinit ai;
584
585 if (posix_aio_state)
586 return 0;
587
588 s = qemu_malloc(sizeof(PosixAioState));
589
590 sigfillset(&act.sa_mask);
591 act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
592 act.sa_handler = aio_signal_handler;
593 sigaction(SIGUSR2, &act, NULL);
594
595 s->first_aio = NULL;
596 if (pipe(fds) == -1) {
597 fprintf(stderr, "failed to create pipe\n");
598 return -errno;
599 }
600
601 s->rfd = fds[0];
602 s->wfd = fds[1];
603
604 fcntl(s->rfd, F_SETFL, O_NONBLOCK);
605 fcntl(s->wfd, F_SETFL, O_NONBLOCK);
606
607 qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
608
609 memset(&ai, 0, sizeof(ai));
610 ai.aio_threads = 64;
611 ai.aio_num = 64;
612 qemu_paio_init(&ai);
613
614 posix_aio_state = s;
615
616 return 0;
617 }
618
619 static void raw_aio_remove(RawAIOCB *acb)
620 {
621 RawAIOCB **pacb;
622
623 /* remove the callback from the queue */
624 pacb = &posix_aio_state->first_aio;
625 for(;;) {
626 if (*pacb == NULL) {
627 fprintf(stderr, "raw_aio_remove: aio request not found!\n");
628 break;
629 } else if (*pacb == acb) {
630 *pacb = acb->next;
631 qemu_aio_release(acb);
632 break;
633 }
634 pacb = &(*pacb)->next;
635 }
636 }
637
638 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
639 {
640 int ret;
641 RawAIOCB *acb = (RawAIOCB *)blockacb;
642
643 ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
644 if (ret == QEMU_PAIO_NOTCANCELED) {
645 /* fail safe: if the aio could not be canceled, we wait for
646 it */
647 while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
648 }
649
650 raw_aio_remove(acb);
651 }
652
653 static AIOPool raw_aio_pool = {
654 .aiocb_size = sizeof(RawAIOCB),
655 .cancel = raw_aio_cancel,
656 };
657
658 static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
659 QEMUIOVector *qiov, int nb_sectors,
660 BlockDriverCompletionFunc *cb, void *opaque)
661 {
662 BDRVRawState *s = bs->opaque;
663 RawAIOCB *acb;
664
665 if (fd_open(bs) < 0)
666 return NULL;
667
668 acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque);
669 if (!acb)
670 return NULL;
671 acb->aiocb.aio_fildes = s->fd;
672 acb->aiocb.ev_signo = SIGUSR2;
673 acb->aiocb.aio_iov = qiov->iov;
674 acb->aiocb.aio_niov = qiov->niov;
675 acb->aiocb.aio_nbytes = nb_sectors * 512;
676 acb->aiocb.aio_offset = sector_num * 512;
677 acb->aiocb.aio_flags = 0;
678
679 /*
680 * If O_DIRECT is used the buffer needs to be aligned on a sector
681 * boundary. Tell the low level code to ensure that in case it's
682 * not done yet.
683 */
684 if (s->aligned_buf)
685 acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED;
686
687 acb->next = posix_aio_state->first_aio;
688 posix_aio_state->first_aio = acb;
689 return acb;
690 }
691
692 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
693 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
694 BlockDriverCompletionFunc *cb, void *opaque)
695 {
696 RawAIOCB *acb;
697
698 acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
699 if (!acb)
700 return NULL;
701 if (qemu_paio_read(&acb->aiocb) < 0) {
702 raw_aio_remove(acb);
703 return NULL;
704 }
705 return &acb->common;
706 }
707
708 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
709 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
710 BlockDriverCompletionFunc *cb, void *opaque)
711 {
712 RawAIOCB *acb;
713
714 acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
715 if (!acb)
716 return NULL;
717 if (qemu_paio_write(&acb->aiocb) < 0) {
718 raw_aio_remove(acb);
719 return NULL;
720 }
721 return &acb->common;
722 }
723 #else /* CONFIG_AIO */
724 static int posix_aio_init(void)
725 {
726 return 0;
727 }
728 #endif /* CONFIG_AIO */
729
730
731 static void raw_close(BlockDriverState *bs)
732 {
733 BDRVRawState *s = bs->opaque;
734 if (s->fd >= 0) {
735 close(s->fd);
736 s->fd = -1;
737 if (s->aligned_buf != NULL)
738 qemu_free(s->aligned_buf);
739 }
740 }
741
742 static int raw_truncate(BlockDriverState *bs, int64_t offset)
743 {
744 BDRVRawState *s = bs->opaque;
745 if (s->type != FTYPE_FILE)
746 return -ENOTSUP;
747 if (ftruncate(s->fd, offset) < 0)
748 return -errno;
749 return 0;
750 }
751
752 #ifdef __OpenBSD__
753 static int64_t raw_getlength(BlockDriverState *bs)
754 {
755 BDRVRawState *s = bs->opaque;
756 int fd = s->fd;
757 struct stat st;
758
759 if (fstat(fd, &st))
760 return -1;
761 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
762 struct disklabel dl;
763
764 if (ioctl(fd, DIOCGDINFO, &dl))
765 return -1;
766 return (uint64_t)dl.d_secsize *
767 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
768 } else
769 return st.st_size;
770 }
771 #else /* !__OpenBSD__ */
772 static int64_t raw_getlength(BlockDriverState *bs)
773 {
774 BDRVRawState *s = bs->opaque;
775 int fd = s->fd;
776 int64_t size;
777 #ifdef HOST_BSD
778 struct stat sb;
779 #ifdef __FreeBSD__
780 int reopened = 0;
781 #endif
782 #endif
783 #ifdef __sun__
784 struct dk_minfo minfo;
785 int rv;
786 #endif
787 int ret;
788
789 ret = fd_open(bs);
790 if (ret < 0)
791 return ret;
792
793 #ifdef HOST_BSD
794 #ifdef __FreeBSD__
795 again:
796 #endif
797 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
798 #ifdef DIOCGMEDIASIZE
799 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
800 #elif defined(DIOCGPART)
801 {
802 struct partinfo pi;
803 if (ioctl(fd, DIOCGPART, &pi) == 0)
804 size = pi.media_size;
805 else
806 size = 0;
807 }
808 if (size == 0)
809 #endif
810 #ifdef CONFIG_COCOA
811 size = LONG_LONG_MAX;
812 #else
813 size = lseek(fd, 0LL, SEEK_END);
814 #endif
815 #ifdef __FreeBSD__
816 switch(s->type) {
817 case FTYPE_CD:
818 /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
819 if (size == 2048LL * (unsigned)-1)
820 size = 0;
821 /* XXX no disc? maybe we need to reopen... */
822 if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
823 reopened = 1;
824 goto again;
825 }
826 }
827 #endif
828 } else
829 #endif
830 #ifdef __sun__
831 /*
832 * use the DKIOCGMEDIAINFO ioctl to read the size.
833 */
834 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
835 if ( rv != -1 ) {
836 size = minfo.dki_lbsize * minfo.dki_capacity;
837 } else /* there are reports that lseek on some devices
838 fails, but irc discussion said that contingency
839 on contingency was overkill */
840 #endif
841 {
842 size = lseek(fd, 0, SEEK_END);
843 }
844 return size;
845 }
846 #endif
847
848 static int raw_create(const char *filename, QEMUOptionParameter *options)
849 {
850 int fd;
851 int64_t total_size = 0;
852
853 /* Read out options */
854 while (options && options->name) {
855 if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
856 total_size = options->value.n / 512;
857 }
858 options++;
859 }
860
861 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
862 0644);
863 if (fd < 0)
864 return -EIO;
865 ftruncate(fd, total_size * 512);
866 close(fd);
867 return 0;
868 }
869
870 static void raw_flush(BlockDriverState *bs)
871 {
872 BDRVRawState *s = bs->opaque;
873 fsync(s->fd);
874 }
875
876
877 static QEMUOptionParameter raw_create_options[] = {
878 {
879 .name = BLOCK_OPT_SIZE,
880 .type = OPT_SIZE,
881 .help = "Virtual disk size"
882 },
883 { NULL }
884 };
885
886 static BlockDriver bdrv_raw = {
887 .format_name = "raw",
888 .instance_size = sizeof(BDRVRawState),
889 .bdrv_probe = NULL, /* no probe for protocols */
890 .bdrv_open = raw_open,
891 .bdrv_read = raw_read,
892 .bdrv_write = raw_write,
893 .bdrv_close = raw_close,
894 .bdrv_create = raw_create,
895 .bdrv_flush = raw_flush,
896
897 #ifdef CONFIG_AIO
898 .bdrv_aio_readv = raw_aio_readv,
899 .bdrv_aio_writev = raw_aio_writev,
900 #endif
901
902 .bdrv_truncate = raw_truncate,
903 .bdrv_getlength = raw_getlength,
904
905 .create_options = raw_create_options,
906 };
907
908 /***********************************************/
909 /* host device */
910
911 #ifdef CONFIG_COCOA
912 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
913 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
914
915 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
916 {
917 kern_return_t kernResult;
918 mach_port_t masterPort;
919 CFMutableDictionaryRef classesToMatch;
920
921 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
922 if ( KERN_SUCCESS != kernResult ) {
923 printf( "IOMasterPort returned %d\n", kernResult );
924 }
925
926 classesToMatch = IOServiceMatching( kIOCDMediaClass );
927 if ( classesToMatch == NULL ) {
928 printf( "IOServiceMatching returned a NULL dictionary.\n" );
929 } else {
930 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
931 }
932 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
933 if ( KERN_SUCCESS != kernResult )
934 {
935 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
936 }
937
938 return kernResult;
939 }
940
941 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
942 {
943 io_object_t nextMedia;
944 kern_return_t kernResult = KERN_FAILURE;
945 *bsdPath = '\0';
946 nextMedia = IOIteratorNext( mediaIterator );
947 if ( nextMedia )
948 {
949 CFTypeRef bsdPathAsCFString;
950 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
951 if ( bsdPathAsCFString ) {
952 size_t devPathLength;
953 strcpy( bsdPath, _PATH_DEV );
954 strcat( bsdPath, "r" );
955 devPathLength = strlen( bsdPath );
956 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
957 kernResult = KERN_SUCCESS;
958 }
959 CFRelease( bsdPathAsCFString );
960 }
961 IOObjectRelease( nextMedia );
962 }
963
964 return kernResult;
965 }
966
967 #endif
968
969 static int hdev_probe_device(const char *filename)
970 {
971 struct stat st;
972
973 /* allow a dedicated CD-ROM driver to match with a higher priority */
974 if (strstart(filename, "/dev/cdrom", NULL))
975 return 50;
976
977 if (stat(filename, &st) >= 0 &&
978 (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
979 return 100;
980 }
981
982 return 0;
983 }
984
985 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
986 {
987 BDRVRawState *s = bs->opaque;
988
989 #ifdef CONFIG_COCOA
990 if (strstart(filename, "/dev/cdrom", NULL)) {
991 kern_return_t kernResult;
992 io_iterator_t mediaIterator;
993 char bsdPath[ MAXPATHLEN ];
994 int fd;
995
996 kernResult = FindEjectableCDMedia( &mediaIterator );
997 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
998
999 if ( bsdPath[ 0 ] != '\0' ) {
1000 strcat(bsdPath,"s0");
1001 /* some CDs don't have a partition 0 */
1002 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
1003 if (fd < 0) {
1004 bsdPath[strlen(bsdPath)-1] = '1';
1005 } else {
1006 close(fd);
1007 }
1008 filename = bsdPath;
1009 }
1010
1011 if ( mediaIterator )
1012 IOObjectRelease( mediaIterator );
1013 }
1014 #endif
1015
1016 s->type = FTYPE_FILE;
1017 #if defined(__linux__) && defined(CONFIG_AIO)
1018 if (strstart(filename, "/dev/sg", NULL)) {
1019 bs->sg = 1;
1020 }
1021 #endif
1022
1023 return raw_open_common(bs, filename, flags, 0);
1024 }
1025
1026 #if defined(__linux__)
1027 /* Note: we do not have a reliable method to detect if the floppy is
1028 present. The current method is to try to open the floppy at every
1029 I/O and to keep it opened during a few hundreds of ms. */
1030 static int fd_open(BlockDriverState *bs)
1031 {
1032 BDRVRawState *s = bs->opaque;
1033 int last_media_present;
1034
1035 if (s->type != FTYPE_FD)
1036 return 0;
1037 last_media_present = (s->fd >= 0);
1038 if (s->fd >= 0 &&
1039 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1040 close(s->fd);
1041 s->fd = -1;
1042 #ifdef DEBUG_FLOPPY
1043 printf("Floppy closed\n");
1044 #endif
1045 }
1046 if (s->fd < 0) {
1047 if (s->fd_got_error &&
1048 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1049 #ifdef DEBUG_FLOPPY
1050 printf("No floppy (open delayed)\n");
1051 #endif
1052 return -EIO;
1053 }
1054 s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
1055 if (s->fd < 0) {
1056 s->fd_error_time = qemu_get_clock(rt_clock);
1057 s->fd_got_error = 1;
1058 if (last_media_present)
1059 s->fd_media_changed = 1;
1060 #ifdef DEBUG_FLOPPY
1061 printf("No floppy\n");
1062 #endif
1063 return -EIO;
1064 }
1065 #ifdef DEBUG_FLOPPY
1066 printf("Floppy opened\n");
1067 #endif
1068 }
1069 if (!last_media_present)
1070 s->fd_media_changed = 1;
1071 s->fd_open_time = qemu_get_clock(rt_clock);
1072 s->fd_got_error = 0;
1073 return 0;
1074 }
1075
1076 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1077 {
1078 BDRVRawState *s = bs->opaque;
1079
1080 return ioctl(s->fd, req, buf);
1081 }
1082
1083 #ifdef CONFIG_AIO
1084 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
1085 unsigned long int req, void *buf,
1086 BlockDriverCompletionFunc *cb, void *opaque)
1087 {
1088 BDRVRawState *s = bs->opaque;
1089 RawAIOCB *acb;
1090
1091 if (fd_open(bs) < 0)
1092 return NULL;
1093
1094 acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque);
1095 if (!acb)
1096 return NULL;
1097 acb->aiocb.aio_fildes = s->fd;
1098 acb->aiocb.ev_signo = SIGUSR2;
1099 acb->aiocb.aio_offset = 0;
1100 acb->aiocb.aio_flags = 0;
1101
1102 acb->next = posix_aio_state->first_aio;
1103 posix_aio_state->first_aio = acb;
1104
1105 acb->aiocb.aio_ioctl_buf = buf;
1106 acb->aiocb.aio_ioctl_cmd = req;
1107 if (qemu_paio_ioctl(&acb->aiocb) < 0) {
1108 raw_aio_remove(acb);
1109 return NULL;
1110 }
1111
1112 return &acb->common;
1113 }
1114 #endif
1115
1116 #elif defined(__FreeBSD__)
1117 static int fd_open(BlockDriverState *bs)
1118 {
1119 BDRVRawState *s = bs->opaque;
1120
1121 /* this is just to ensure s->fd is sane (its called by io ops) */
1122 if (s->fd >= 0)
1123 return 0;
1124 return -EIO;
1125 }
1126 #else /* !linux && !FreeBSD */
1127
1128 static int fd_open(BlockDriverState *bs)
1129 {
1130 return 0;
1131 }
1132
1133 #endif /* !linux && !FreeBSD */
1134
1135 static int hdev_create(const char *filename, QEMUOptionParameter *options)
1136 {
1137 int fd;
1138 int ret = 0;
1139 struct stat stat_buf;
1140 int64_t total_size = 0;
1141
1142 /* Read out options */
1143 while (options && options->name) {
1144 if (!strcmp(options->name, "size")) {
1145 total_size = options->value.n / 512;
1146 }
1147 options++;
1148 }
1149
1150 fd = open(filename, O_WRONLY | O_BINARY);
1151 if (fd < 0)
1152 return -EIO;
1153
1154 if (fstat(fd, &stat_buf) < 0)
1155 ret = -EIO;
1156 else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
1157 ret = -EIO;
1158 else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1159 ret = -ENOSPC;
1160
1161 close(fd);
1162 return ret;
1163 }
1164
1165 static BlockDriver bdrv_host_device = {
1166 .format_name = "host_device",
1167 .instance_size = sizeof(BDRVRawState),
1168 .bdrv_probe_device = hdev_probe_device,
1169 .bdrv_open = hdev_open,
1170 .bdrv_close = raw_close,
1171 .bdrv_create = hdev_create,
1172 .bdrv_flush = raw_flush,
1173
1174 #ifdef CONFIG_AIO
1175 .bdrv_aio_readv = raw_aio_readv,
1176 .bdrv_aio_writev = raw_aio_writev,
1177 #endif
1178
1179 .bdrv_read = raw_read,
1180 .bdrv_write = raw_write,
1181 .bdrv_getlength = raw_getlength,
1182
1183 /* generic scsi device */
1184 #ifdef __linux__
1185 .bdrv_ioctl = hdev_ioctl,
1186 #ifdef CONFIG_AIO
1187 .bdrv_aio_ioctl = hdev_aio_ioctl,
1188 #endif
1189 #endif
1190 };
1191
1192 #ifdef __linux__
1193 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1194 {
1195 BDRVRawState *s = bs->opaque;
1196 int ret;
1197
1198 posix_aio_init();
1199
1200 s->type = FTYPE_FD;
1201
1202 /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1203 ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
1204 if (ret)
1205 return ret;
1206
1207 /* close fd so that we can reopen it as needed */
1208 close(s->fd);
1209 s->fd = -1;
1210 s->fd_media_changed = 1;
1211
1212 return 0;
1213 }
1214
1215 static int floppy_probe_device(const char *filename)
1216 {
1217 if (strstart(filename, "/dev/fd", NULL))
1218 return 100;
1219 return 0;
1220 }
1221
1222
1223 static int floppy_is_inserted(BlockDriverState *bs)
1224 {
1225 return fd_open(bs) >= 0;
1226 }
1227
1228 static int floppy_media_changed(BlockDriverState *bs)
1229 {
1230 BDRVRawState *s = bs->opaque;
1231 int ret;
1232
1233 /*
1234 * XXX: we do not have a true media changed indication.
1235 * It does not work if the floppy is changed without trying to read it.
1236 */
1237 fd_open(bs);
1238 ret = s->fd_media_changed;
1239 s->fd_media_changed = 0;
1240 #ifdef DEBUG_FLOPPY
1241 printf("Floppy changed=%d\n", ret);
1242 #endif
1243 return ret;
1244 }
1245
1246 static int floppy_eject(BlockDriverState *bs, int eject_flag)
1247 {
1248 BDRVRawState *s = bs->opaque;
1249 int fd;
1250
1251 if (s->fd >= 0) {
1252 close(s->fd);
1253 s->fd = -1;
1254 }
1255 fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1256 if (fd >= 0) {
1257 if (ioctl(fd, FDEJECT, 0) < 0)
1258 perror("FDEJECT");
1259 close(fd);
1260 }
1261
1262 return 0;
1263 }
1264
1265 static BlockDriver bdrv_host_floppy = {
1266 .format_name = "host_floppy",
1267 .instance_size = sizeof(BDRVRawState),
1268 .bdrv_probe_device = floppy_probe_device,
1269 .bdrv_open = floppy_open,
1270 .bdrv_close = raw_close,
1271 .bdrv_create = hdev_create,
1272 .bdrv_flush = raw_flush,
1273
1274 #ifdef CONFIG_AIO
1275 .bdrv_aio_readv = raw_aio_readv,
1276 .bdrv_aio_writev = raw_aio_writev,
1277 #endif
1278
1279 .bdrv_read = raw_read,
1280 .bdrv_write = raw_write,
1281 .bdrv_getlength = raw_getlength,
1282
1283 /* removable device support */
1284 .bdrv_is_inserted = floppy_is_inserted,
1285 .bdrv_media_changed = floppy_media_changed,
1286 .bdrv_eject = floppy_eject,
1287 };
1288
1289 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1290 {
1291 BDRVRawState *s = bs->opaque;
1292
1293 s->type = FTYPE_CD;
1294
1295 /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
1296 return raw_open_common(bs, filename, flags, O_NONBLOCK);
1297 }
1298
1299 static int cdrom_probe_device(const char *filename)
1300 {
1301 if (strstart(filename, "/dev/cd", NULL))
1302 return 100;
1303 return 0;
1304 }
1305
1306 static int cdrom_is_inserted(BlockDriverState *bs)
1307 {
1308 BDRVRawState *s = bs->opaque;
1309 int ret;
1310
1311 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1312 if (ret == CDS_DISC_OK)
1313 return 1;
1314 return 0;
1315 }
1316
1317 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1318 {
1319 BDRVRawState *s = bs->opaque;
1320
1321 if (eject_flag) {
1322 if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
1323 perror("CDROMEJECT");
1324 } else {
1325 if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
1326 perror("CDROMEJECT");
1327 }
1328
1329 return 0;
1330 }
1331
1332 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1333 {
1334 BDRVRawState *s = bs->opaque;
1335
1336 if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
1337 /*
1338 * Note: an error can happen if the distribution automatically
1339 * mounts the CD-ROM
1340 */
1341 /* perror("CDROM_LOCKDOOR"); */
1342 }
1343
1344 return 0;
1345 }
1346
1347 static BlockDriver bdrv_host_cdrom = {
1348 .format_name = "host_cdrom",
1349 .instance_size = sizeof(BDRVRawState),
1350 .bdrv_probe_device = cdrom_probe_device,
1351 .bdrv_open = cdrom_open,
1352 .bdrv_close = raw_close,
1353 .bdrv_create = hdev_create,
1354 .bdrv_flush = raw_flush,
1355
1356 #ifdef CONFIG_AIO
1357 .bdrv_aio_readv = raw_aio_readv,
1358 .bdrv_aio_writev = raw_aio_writev,
1359 #endif
1360
1361 .bdrv_read = raw_read,
1362 .bdrv_write = raw_write,
1363 .bdrv_getlength = raw_getlength,
1364
1365 /* removable device support */
1366 .bdrv_is_inserted = cdrom_is_inserted,
1367 .bdrv_eject = cdrom_eject,
1368 .bdrv_set_locked = cdrom_set_locked,
1369
1370 /* generic scsi device */
1371 .bdrv_ioctl = hdev_ioctl,
1372 #ifdef CONFIG_AIO
1373 .bdrv_aio_ioctl = hdev_aio_ioctl,
1374 #endif
1375 };
1376 #endif /* __linux__ */
1377
1378 #ifdef __FreeBSD__
1379 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1380 {
1381 BDRVRawState *s = bs->opaque;
1382 int ret;
1383
1384 s->type = FTYPE_CD;
1385
1386 ret = raw_open_common(bs, filename, flags, 0);
1387 if (ret)
1388 return ret;
1389
1390 /* make sure the door isnt locked at this time */
1391 ioctl(s->fd, CDIOCALLOW);
1392 return 0;
1393 }
1394
1395 static int cdrom_probe_device(const char *filename)
1396 {
1397 if (strstart(filename, "/dev/cd", NULL) ||
1398 strstart(filename, "/dev/acd", NULL))
1399 return 100;
1400 return 0;
1401 }
1402
1403 static int cdrom_reopen(BlockDriverState *bs)
1404 {
1405 BDRVRawState *s = bs->opaque;
1406 int fd;
1407
1408 /*
1409 * Force reread of possibly changed/newly loaded disc,
1410 * FreeBSD seems to not notice sometimes...
1411 */
1412 if (s->fd >= 0)
1413 close(s->fd);
1414 fd = open(bs->filename, s->open_flags, 0644);
1415 if (fd < 0) {
1416 s->fd = -1;
1417 return -EIO;
1418 }
1419 s->fd = fd;
1420
1421 /* make sure the door isnt locked at this time */
1422 ioctl(s->fd, CDIOCALLOW);
1423 return 0;
1424 }
1425
1426 static int cdrom_is_inserted(BlockDriverState *bs)
1427 {
1428 return raw_getlength(bs) > 0;
1429 }
1430
1431 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1432 {
1433 BDRVRawState *s = bs->opaque;
1434
1435 if (s->fd < 0)
1436 return -ENOTSUP;
1437
1438 (void) ioctl(s->fd, CDIOCALLOW);
1439
1440 if (eject_flag) {
1441 if (ioctl(s->fd, CDIOCEJECT) < 0)
1442 perror("CDIOCEJECT");
1443 } else {
1444 if (ioctl(s->fd, CDIOCCLOSE) < 0)
1445 perror("CDIOCCLOSE");
1446 }
1447
1448 if (cdrom_reopen(bs) < 0)
1449 return -ENOTSUP;
1450 return 0;
1451 }
1452
1453 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1454 {
1455 BDRVRawState *s = bs->opaque;
1456
1457 if (s->fd < 0)
1458 return -ENOTSUP;
1459 if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1460 /*
1461 * Note: an error can happen if the distribution automatically
1462 * mounts the CD-ROM
1463 */
1464 /* perror("CDROM_LOCKDOOR"); */
1465 }
1466
1467 return 0;
1468 }
1469
1470 static BlockDriver bdrv_host_cdrom = {
1471 .format_name = "host_cdrom",
1472 .instance_size = sizeof(BDRVRawState),
1473 .bdrv_probe_device = cdrom_probe_device,
1474 .bdrv_open = cdrom_open,
1475 .bdrv_close = raw_close,
1476 .bdrv_create = hdev_create,
1477 .bdrv_flush = raw_flush,
1478
1479 #ifdef CONFIG_AIO
1480 .bdrv_aio_readv = raw_aio_readv,
1481 .bdrv_aio_writev = raw_aio_writev,
1482 #endif
1483
1484 .bdrv_read = raw_read,
1485 .bdrv_write = raw_write,
1486 .bdrv_getlength = raw_getlength,
1487
1488 /* removable device support */
1489 .bdrv_is_inserted = cdrom_is_inserted,
1490 .bdrv_eject = cdrom_eject,
1491 .bdrv_set_locked = cdrom_set_locked,
1492 };
1493 #endif /* __FreeBSD__ */
1494
1495 static void bdrv_raw_init(void)
1496 {
1497 /*
1498 * Register all the drivers. Note that order is important, the driver
1499 * registered last will get probed first.
1500 */
1501 bdrv_register(&bdrv_raw);
1502 bdrv_register(&bdrv_host_device);
1503 #ifdef __linux__
1504 bdrv_register(&bdrv_host_floppy);
1505 bdrv_register(&bdrv_host_cdrom);
1506 #endif
1507 #ifdef __FreeBSD__
1508 bdrv_register(&bdrv_host_cdrom);
1509 #endif
1510 }
1511
1512 block_init(bdrv_raw_init);
QEMU mirror