sh4/r2d: update pci, usb and kernel management
[qemu/sh4.git] / block-raw-posix.c
blob0a06a12fb6d6fea94f7c5ee5759c9a4fd545fa4f
1 /*
2 * Block driver for RAW files (posix)
4 * Copyright (c) 2006 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 #include "qemu-common.h"
25 #include "qemu-timer.h"
26 #include "qemu-char.h"
27 #include "block_int.h"
28 #include <assert.h>
29 #ifdef CONFIG_AIO
30 #include <aio.h>
31 #endif
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
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 #endif
60 #ifdef __OpenBSD__
61 #include <sys/ioctl.h>
62 #include <sys/disklabel.h>
63 #include <sys/dkio.h>
64 #endif
66 //#define DEBUG_FLOPPY
68 //#define DEBUG_BLOCK
69 #if defined(DEBUG_BLOCK)
70 #define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \
71 { fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0)
72 #else
73 #define DEBUG_BLOCK_PRINT(formatCstr, args...)
74 #endif
76 /* OS X does not have O_DSYNC */
77 #ifndef O_DSYNC
78 #define O_DSYNC O_SYNC
79 #endif
81 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
82 #ifndef O_DIRECT
83 #define O_DIRECT O_DSYNC
84 #endif
86 #define FTYPE_FILE 0
87 #define FTYPE_CD 1
88 #define FTYPE_FD 2
90 #define ALIGNED_BUFFER_SIZE (32 * 512)
92 /* if the FD is not accessed during that time (in ms), we try to
93 reopen it to see if the disk has been changed */
94 #define FD_OPEN_TIMEOUT 1000
96 /* posix-aio doesn't allow multiple outstanding requests to a single file
97 * descriptor. we implement a pool of dup()'d file descriptors to work
98 * around this */
99 #define RAW_FD_POOL_SIZE 64
101 typedef struct BDRVRawState {
102 int fd;
103 int type;
104 unsigned int lseek_err_cnt;
105 int fd_pool[RAW_FD_POOL_SIZE];
106 #if defined(__linux__)
107 /* linux floppy specific */
108 int fd_open_flags;
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;
117 static int posix_aio_init(void);
119 static int fd_open(BlockDriverState *bs);
121 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
123 BDRVRawState *s = bs->opaque;
124 int fd, open_flags, ret;
125 int i;
127 posix_aio_init();
129 s->lseek_err_cnt = 0;
131 open_flags = O_BINARY;
132 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
133 open_flags |= O_RDWR;
134 } else {
135 open_flags |= O_RDONLY;
136 bs->read_only = 1;
138 if (flags & BDRV_O_CREAT)
139 open_flags |= O_CREAT | O_TRUNC;
141 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
142 * and O_DIRECT for no caching. */
143 if ((flags & BDRV_O_NOCACHE))
144 open_flags |= O_DIRECT;
145 else if (!(flags & BDRV_O_CACHE_WB))
146 open_flags |= O_DSYNC;
148 s->type = FTYPE_FILE;
150 fd = open(filename, open_flags, 0644);
151 if (fd < 0) {
152 ret = -errno;
153 if (ret == -EROFS)
154 ret = -EACCES;
155 return ret;
157 s->fd = fd;
158 for (i = 0; i < RAW_FD_POOL_SIZE; i++)
159 s->fd_pool[i] = -1;
160 s->aligned_buf = NULL;
161 if ((flags & BDRV_O_NOCACHE)) {
162 s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
163 if (s->aligned_buf == NULL) {
164 ret = -errno;
165 close(fd);
166 return ret;
169 return 0;
172 /* XXX: use host sector size if necessary with:
173 #ifdef DIOCGSECTORSIZE
175 unsigned int sectorsize = 512;
176 if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
177 sectorsize > bufsize)
178 bufsize = sectorsize;
180 #endif
181 #ifdef CONFIG_COCOA
182 u_int32_t blockSize = 512;
183 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
184 bufsize = blockSize;
186 #endif
190 * offset and count are in bytes, but must be multiples of 512 for files
191 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
193 * This function may be called without alignment if the caller ensures
194 * that O_DIRECT is not in effect.
196 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
197 uint8_t *buf, int count)
199 BDRVRawState *s = bs->opaque;
200 int ret;
202 ret = fd_open(bs);
203 if (ret < 0)
204 return ret;
206 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
207 ++(s->lseek_err_cnt);
208 if(s->lseek_err_cnt <= 10) {
209 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
210 "] lseek failed : %d = %s\n",
211 s->fd, bs->filename, offset, buf, count,
212 bs->total_sectors, errno, strerror(errno));
214 return -1;
216 s->lseek_err_cnt=0;
218 ret = read(s->fd, buf, count);
219 if (ret == count)
220 goto label__raw_read__success;
222 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
223 "] read failed %d : %d = %s\n",
224 s->fd, bs->filename, offset, buf, count,
225 bs->total_sectors, ret, errno, strerror(errno));
227 /* Try harder for CDrom. */
228 if (bs->type == BDRV_TYPE_CDROM) {
229 lseek(s->fd, offset, SEEK_SET);
230 ret = read(s->fd, buf, count);
231 if (ret == count)
232 goto label__raw_read__success;
233 lseek(s->fd, offset, SEEK_SET);
234 ret = read(s->fd, buf, count);
235 if (ret == count)
236 goto label__raw_read__success;
238 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
239 "] retry read failed %d : %d = %s\n",
240 s->fd, bs->filename, offset, buf, count,
241 bs->total_sectors, ret, errno, strerror(errno));
244 label__raw_read__success:
246 return ret;
250 * offset and count are in bytes, but must be multiples of 512 for files
251 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
253 * This function may be called without alignment if the caller ensures
254 * that O_DIRECT is not in effect.
256 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
257 const uint8_t *buf, int count)
259 BDRVRawState *s = bs->opaque;
260 int ret;
262 ret = fd_open(bs);
263 if (ret < 0)
264 return ret;
266 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
267 ++(s->lseek_err_cnt);
268 if(s->lseek_err_cnt) {
269 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
270 PRId64 "] lseek failed : %d = %s\n",
271 s->fd, bs->filename, offset, buf, count,
272 bs->total_sectors, errno, strerror(errno));
274 return -1;
276 s->lseek_err_cnt = 0;
278 ret = write(s->fd, buf, count);
279 if (ret == count)
280 goto label__raw_write__success;
282 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
283 "] write failed %d : %d = %s\n",
284 s->fd, bs->filename, offset, buf, count,
285 bs->total_sectors, ret, errno, strerror(errno));
287 label__raw_write__success:
289 return ret;
294 * offset and count are in bytes and possibly not aligned. For files opened
295 * with O_DIRECT, necessary alignments are ensured before calling
296 * raw_pread_aligned to do the actual read.
298 static int raw_pread(BlockDriverState *bs, int64_t offset,
299 uint8_t *buf, int count)
301 BDRVRawState *s = bs->opaque;
302 int size, ret, shift, sum;
304 sum = 0;
306 if (s->aligned_buf != NULL) {
308 if (offset & 0x1ff) {
309 /* align offset on a 512 bytes boundary */
311 shift = offset & 0x1ff;
312 size = (shift + count + 0x1ff) & ~0x1ff;
313 if (size > ALIGNED_BUFFER_SIZE)
314 size = ALIGNED_BUFFER_SIZE;
315 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
316 if (ret < 0)
317 return ret;
319 size = 512 - shift;
320 if (size > count)
321 size = count;
322 memcpy(buf, s->aligned_buf + shift, size);
324 buf += size;
325 offset += size;
326 count -= size;
327 sum += size;
329 if (count == 0)
330 return sum;
332 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
334 /* read on aligned buffer */
336 while (count) {
338 size = (count + 0x1ff) & ~0x1ff;
339 if (size > ALIGNED_BUFFER_SIZE)
340 size = ALIGNED_BUFFER_SIZE;
342 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
343 if (ret < 0)
344 return ret;
346 size = ret;
347 if (size > count)
348 size = count;
350 memcpy(buf, s->aligned_buf, size);
352 buf += size;
353 offset += size;
354 count -= size;
355 sum += size;
358 return sum;
362 return raw_pread_aligned(bs, offset, buf, count) + sum;
366 * offset and count are in bytes and possibly not aligned. For files opened
367 * with O_DIRECT, necessary alignments are ensured before calling
368 * raw_pwrite_aligned to do the actual write.
370 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
371 const uint8_t *buf, int count)
373 BDRVRawState *s = bs->opaque;
374 int size, ret, shift, sum;
376 sum = 0;
378 if (s->aligned_buf != NULL) {
380 if (offset & 0x1ff) {
381 /* align offset on a 512 bytes boundary */
382 shift = offset & 0x1ff;
383 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
384 if (ret < 0)
385 return ret;
387 size = 512 - shift;
388 if (size > count)
389 size = count;
390 memcpy(s->aligned_buf + shift, buf, size);
392 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
393 if (ret < 0)
394 return ret;
396 buf += size;
397 offset += size;
398 count -= size;
399 sum += size;
401 if (count == 0)
402 return sum;
404 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
406 while ((size = (count & ~0x1ff)) != 0) {
408 if (size > ALIGNED_BUFFER_SIZE)
409 size = ALIGNED_BUFFER_SIZE;
411 memcpy(s->aligned_buf, buf, size);
413 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
414 if (ret < 0)
415 return ret;
417 buf += ret;
418 offset += ret;
419 count -= ret;
420 sum += ret;
422 /* here, count < 512 because (count & ~0x1ff) == 0 */
423 if (count) {
424 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
425 if (ret < 0)
426 return ret;
427 memcpy(s->aligned_buf, buf, count);
429 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
430 if (ret < 0)
431 return ret;
432 if (count < ret)
433 ret = count;
435 sum += ret;
437 return sum;
440 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
443 #ifdef CONFIG_AIO
444 /***********************************************************/
445 /* Unix AIO using POSIX AIO */
447 typedef struct RawAIOCB {
448 BlockDriverAIOCB common;
449 int fd;
450 struct aiocb aiocb;
451 struct RawAIOCB *next;
452 int ret;
453 } RawAIOCB;
455 typedef struct PosixAioState
457 int rfd, wfd;
458 RawAIOCB *first_aio;
459 } PosixAioState;
461 static int raw_fd_pool_get(BDRVRawState *s)
463 int i;
465 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
466 /* already in use */
467 if (s->fd_pool[i] != -1)
468 continue;
470 /* try to dup file descriptor */
471 s->fd_pool[i] = dup(s->fd);
472 if (s->fd_pool[i] != -1)
473 return s->fd_pool[i];
476 /* we couldn't dup the file descriptor so just use the main one */
477 return s->fd;
480 static void raw_fd_pool_put(RawAIOCB *acb)
482 BDRVRawState *s = acb->common.bs->opaque;
483 int i;
485 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
486 if (s->fd_pool[i] == acb->fd) {
487 close(s->fd_pool[i]);
488 s->fd_pool[i] = -1;
493 static void posix_aio_read(void *opaque)
495 PosixAioState *s = opaque;
496 RawAIOCB *acb, **pacb;
497 int ret;
498 ssize_t len;
500 /* read all bytes from signal pipe */
501 for (;;) {
502 char bytes[16];
504 len = read(s->rfd, bytes, sizeof(bytes));
505 if (len == -1 && errno == EINTR)
506 continue; /* try again */
507 if (len == sizeof(bytes))
508 continue; /* more to read */
509 break;
512 for(;;) {
513 pacb = &s->first_aio;
514 for(;;) {
515 acb = *pacb;
516 if (!acb)
517 goto the_end;
518 ret = aio_error(&acb->aiocb);
519 if (ret == ECANCELED) {
520 /* remove the request */
521 *pacb = acb->next;
522 raw_fd_pool_put(acb);
523 qemu_aio_release(acb);
524 } else if (ret != EINPROGRESS) {
525 /* end of aio */
526 if (ret == 0) {
527 ret = aio_return(&acb->aiocb);
528 if (ret == acb->aiocb.aio_nbytes)
529 ret = 0;
530 else
531 ret = -EINVAL;
532 } else {
533 ret = -ret;
535 /* remove the request */
536 *pacb = acb->next;
537 /* call the callback */
538 acb->common.cb(acb->common.opaque, ret);
539 raw_fd_pool_put(acb);
540 qemu_aio_release(acb);
541 break;
542 } else {
543 pacb = &acb->next;
547 the_end: ;
550 static int posix_aio_flush(void *opaque)
552 PosixAioState *s = opaque;
553 return !!s->first_aio;
556 static PosixAioState *posix_aio_state;
558 static void aio_signal_handler(int signum)
560 if (posix_aio_state) {
561 char byte = 0;
563 write(posix_aio_state->wfd, &byte, sizeof(byte));
566 qemu_service_io();
569 static int posix_aio_init(void)
571 struct sigaction act;
572 PosixAioState *s;
573 int fds[2];
575 if (posix_aio_state)
576 return 0;
578 s = qemu_malloc(sizeof(PosixAioState));
579 if (s == NULL)
580 return -ENOMEM;
582 sigfillset(&act.sa_mask);
583 act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
584 act.sa_handler = aio_signal_handler;
585 sigaction(SIGUSR2, &act, NULL);
587 s->first_aio = NULL;
588 if (pipe(fds) == -1) {
589 fprintf(stderr, "failed to create pipe\n");
590 return -errno;
593 s->rfd = fds[0];
594 s->wfd = fds[1];
596 fcntl(s->rfd, F_SETFL, O_NONBLOCK);
597 fcntl(s->wfd, F_SETFL, O_NONBLOCK);
599 qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
601 #if defined(__linux__)
603 struct aioinit ai;
605 memset(&ai, 0, sizeof(ai));
606 #if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 4)
607 ai.aio_threads = 64;
608 ai.aio_num = 64;
609 #else
610 /* XXX: aio thread exit seems to hang on RedHat 9 and this init
611 seems to fix the problem. */
612 ai.aio_threads = 1;
613 ai.aio_num = 1;
614 ai.aio_idle_time = 365 * 100000;
615 #endif
616 aio_init(&ai);
618 #endif
619 posix_aio_state = s;
621 return 0;
624 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
625 int64_t sector_num, uint8_t *buf, int nb_sectors,
626 BlockDriverCompletionFunc *cb, void *opaque)
628 BDRVRawState *s = bs->opaque;
629 RawAIOCB *acb;
631 if (fd_open(bs) < 0)
632 return NULL;
634 acb = qemu_aio_get(bs, cb, opaque);
635 if (!acb)
636 return NULL;
637 acb->fd = raw_fd_pool_get(s);
638 acb->aiocb.aio_fildes = acb->fd;
639 acb->aiocb.aio_sigevent.sigev_signo = SIGUSR2;
640 acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
641 acb->aiocb.aio_buf = buf;
642 if (nb_sectors < 0)
643 acb->aiocb.aio_nbytes = -nb_sectors;
644 else
645 acb->aiocb.aio_nbytes = nb_sectors * 512;
646 acb->aiocb.aio_offset = sector_num * 512;
647 acb->next = posix_aio_state->first_aio;
648 posix_aio_state->first_aio = acb;
649 return acb;
652 static void raw_aio_em_cb(void* opaque)
654 RawAIOCB *acb = opaque;
655 acb->common.cb(acb->common.opaque, acb->ret);
656 qemu_aio_release(acb);
659 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
660 int64_t sector_num, uint8_t *buf, int nb_sectors,
661 BlockDriverCompletionFunc *cb, void *opaque)
663 RawAIOCB *acb;
666 * If O_DIRECT is used and the buffer is not aligned fall back
667 * to synchronous IO.
669 BDRVRawState *s = bs->opaque;
671 if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
672 QEMUBH *bh;
673 acb = qemu_aio_get(bs, cb, opaque);
674 acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors);
675 bh = qemu_bh_new(raw_aio_em_cb, acb);
676 qemu_bh_schedule(bh);
677 return &acb->common;
680 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
681 if (!acb)
682 return NULL;
683 if (aio_read(&acb->aiocb) < 0) {
684 qemu_aio_release(acb);
685 return NULL;
687 return &acb->common;
690 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
691 int64_t sector_num, const uint8_t *buf, int nb_sectors,
692 BlockDriverCompletionFunc *cb, void *opaque)
694 RawAIOCB *acb;
697 * If O_DIRECT is used and the buffer is not aligned fall back
698 * to synchronous IO.
700 BDRVRawState *s = bs->opaque;
702 if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
703 QEMUBH *bh;
704 acb = qemu_aio_get(bs, cb, opaque);
705 acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors);
706 bh = qemu_bh_new(raw_aio_em_cb, acb);
707 qemu_bh_schedule(bh);
708 return &acb->common;
711 acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
712 if (!acb)
713 return NULL;
714 if (aio_write(&acb->aiocb) < 0) {
715 qemu_aio_release(acb);
716 return NULL;
718 return &acb->common;
721 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
723 int ret;
724 RawAIOCB *acb = (RawAIOCB *)blockacb;
725 RawAIOCB **pacb;
727 ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
728 if (ret == AIO_NOTCANCELED) {
729 /* fail safe: if the aio could not be canceled, we wait for
730 it */
731 while (aio_error(&acb->aiocb) == EINPROGRESS);
734 /* remove the callback from the queue */
735 pacb = &posix_aio_state->first_aio;
736 for(;;) {
737 if (*pacb == NULL) {
738 break;
739 } else if (*pacb == acb) {
740 *pacb = acb->next;
741 raw_fd_pool_put(acb);
742 qemu_aio_release(acb);
743 break;
745 pacb = &acb->next;
749 #else /* CONFIG_AIO */
750 static int posix_aio_init(void)
752 return 0;
754 #endif /* CONFIG_AIO */
756 static void raw_close_fd_pool(BDRVRawState *s)
758 int i;
760 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
761 if (s->fd_pool[i] != -1) {
762 close(s->fd_pool[i]);
763 s->fd_pool[i] = -1;
768 static void raw_close(BlockDriverState *bs)
770 BDRVRawState *s = bs->opaque;
771 if (s->fd >= 0) {
772 close(s->fd);
773 s->fd = -1;
774 if (s->aligned_buf != NULL)
775 qemu_free(s->aligned_buf);
777 raw_close_fd_pool(s);
780 static int raw_truncate(BlockDriverState *bs, int64_t offset)
782 BDRVRawState *s = bs->opaque;
783 if (s->type != FTYPE_FILE)
784 return -ENOTSUP;
785 if (ftruncate(s->fd, offset) < 0)
786 return -errno;
787 return 0;
790 #ifdef __OpenBSD__
791 static int64_t raw_getlength(BlockDriverState *bs)
793 BDRVRawState *s = bs->opaque;
794 int fd = s->fd;
795 struct stat st;
797 if (fstat(fd, &st))
798 return -1;
799 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
800 struct disklabel dl;
802 if (ioctl(fd, DIOCGDINFO, &dl))
803 return -1;
804 return (uint64_t)dl.d_secsize *
805 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
806 } else
807 return st.st_size;
809 #else /* !__OpenBSD__ */
810 static int64_t raw_getlength(BlockDriverState *bs)
812 BDRVRawState *s = bs->opaque;
813 int fd = s->fd;
814 int64_t size;
815 #ifdef _BSD
816 struct stat sb;
817 #endif
818 #ifdef __sun__
819 struct dk_minfo minfo;
820 int rv;
821 #endif
822 int ret;
824 ret = fd_open(bs);
825 if (ret < 0)
826 return ret;
828 #ifdef _BSD
829 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
830 #ifdef DIOCGMEDIASIZE
831 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
832 #endif
833 #ifdef CONFIG_COCOA
834 size = LONG_LONG_MAX;
835 #else
836 size = lseek(fd, 0LL, SEEK_END);
837 #endif
838 } else
839 #endif
840 #ifdef __sun__
842 * use the DKIOCGMEDIAINFO ioctl to read the size.
844 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
845 if ( rv != -1 ) {
846 size = minfo.dki_lbsize * minfo.dki_capacity;
847 } else /* there are reports that lseek on some devices
848 fails, but irc discussion said that contingency
849 on contingency was overkill */
850 #endif
852 size = lseek(fd, 0, SEEK_END);
854 return size;
856 #endif
858 static int raw_create(const char *filename, int64_t total_size,
859 const char *backing_file, int flags)
861 int fd;
863 if (flags || backing_file)
864 return -ENOTSUP;
866 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
867 0644);
868 if (fd < 0)
869 return -EIO;
870 ftruncate(fd, total_size * 512);
871 close(fd);
872 return 0;
875 static void raw_flush(BlockDriverState *bs)
877 BDRVRawState *s = bs->opaque;
878 fsync(s->fd);
881 BlockDriver bdrv_raw = {
882 "raw",
883 sizeof(BDRVRawState),
884 NULL, /* no probe for protocols */
885 raw_open,
886 NULL,
887 NULL,
888 raw_close,
889 raw_create,
890 raw_flush,
892 #ifdef CONFIG_AIO
893 .bdrv_aio_read = raw_aio_read,
894 .bdrv_aio_write = raw_aio_write,
895 .bdrv_aio_cancel = raw_aio_cancel,
896 .aiocb_size = sizeof(RawAIOCB),
897 #endif
898 .bdrv_pread = raw_pread,
899 .bdrv_pwrite = raw_pwrite,
900 .bdrv_truncate = raw_truncate,
901 .bdrv_getlength = raw_getlength,
904 /***********************************************/
905 /* host device */
907 #ifdef CONFIG_COCOA
908 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
909 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
911 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
913 kern_return_t kernResult;
914 mach_port_t masterPort;
915 CFMutableDictionaryRef classesToMatch;
917 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
918 if ( KERN_SUCCESS != kernResult ) {
919 printf( "IOMasterPort returned %d\n", kernResult );
922 classesToMatch = IOServiceMatching( kIOCDMediaClass );
923 if ( classesToMatch == NULL ) {
924 printf( "IOServiceMatching returned a NULL dictionary.\n" );
925 } else {
926 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
928 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
929 if ( KERN_SUCCESS != kernResult )
931 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
934 return kernResult;
937 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
939 io_object_t nextMedia;
940 kern_return_t kernResult = KERN_FAILURE;
941 *bsdPath = '\0';
942 nextMedia = IOIteratorNext( mediaIterator );
943 if ( nextMedia )
945 CFTypeRef bsdPathAsCFString;
946 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
947 if ( bsdPathAsCFString ) {
948 size_t devPathLength;
949 strcpy( bsdPath, _PATH_DEV );
950 strcat( bsdPath, "r" );
951 devPathLength = strlen( bsdPath );
952 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
953 kernResult = KERN_SUCCESS;
955 CFRelease( bsdPathAsCFString );
957 IOObjectRelease( nextMedia );
960 return kernResult;
963 #endif
965 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
967 BDRVRawState *s = bs->opaque;
968 int fd, open_flags, ret, i;
970 posix_aio_init();
972 #ifdef CONFIG_COCOA
973 if (strstart(filename, "/dev/cdrom", NULL)) {
974 kern_return_t kernResult;
975 io_iterator_t mediaIterator;
976 char bsdPath[ MAXPATHLEN ];
977 int fd;
979 kernResult = FindEjectableCDMedia( &mediaIterator );
980 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
982 if ( bsdPath[ 0 ] != '\0' ) {
983 strcat(bsdPath,"s0");
984 /* some CDs don't have a partition 0 */
985 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
986 if (fd < 0) {
987 bsdPath[strlen(bsdPath)-1] = '1';
988 } else {
989 close(fd);
991 filename = bsdPath;
994 if ( mediaIterator )
995 IOObjectRelease( mediaIterator );
997 #endif
998 open_flags = O_BINARY;
999 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
1000 open_flags |= O_RDWR;
1001 } else {
1002 open_flags |= O_RDONLY;
1003 bs->read_only = 1;
1005 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
1006 * and O_DIRECT for no caching. */
1007 if ((flags & BDRV_O_NOCACHE))
1008 open_flags |= O_DIRECT;
1009 else if (!(flags & BDRV_O_CACHE_WB))
1010 open_flags |= O_DSYNC;
1012 s->type = FTYPE_FILE;
1013 #if defined(__linux__)
1014 if (strstart(filename, "/dev/cd", NULL)) {
1015 /* open will not fail even if no CD is inserted */
1016 open_flags |= O_NONBLOCK;
1017 s->type = FTYPE_CD;
1018 } else if (strstart(filename, "/dev/fd", NULL)) {
1019 s->type = FTYPE_FD;
1020 s->fd_open_flags = open_flags;
1021 /* open will not fail even if no floppy is inserted */
1022 open_flags |= O_NONBLOCK;
1023 } else if (strstart(filename, "/dev/sg", NULL)) {
1024 bs->sg = 1;
1026 #endif
1027 fd = open(filename, open_flags, 0644);
1028 if (fd < 0) {
1029 ret = -errno;
1030 if (ret == -EROFS)
1031 ret = -EACCES;
1032 return ret;
1034 s->fd = fd;
1035 for (i = 0; i < RAW_FD_POOL_SIZE; i++)
1036 s->fd_pool[i] = -1;
1037 #if defined(__linux__)
1038 /* close fd so that we can reopen it as needed */
1039 if (s->type == FTYPE_FD) {
1040 close(s->fd);
1041 s->fd = -1;
1042 s->fd_media_changed = 1;
1044 #endif
1045 return 0;
1048 #if defined(__linux__)
1049 /* Note: we do not have a reliable method to detect if the floppy is
1050 present. The current method is to try to open the floppy at every
1051 I/O and to keep it opened during a few hundreds of ms. */
1052 static int fd_open(BlockDriverState *bs)
1054 BDRVRawState *s = bs->opaque;
1055 int last_media_present;
1057 if (s->type != FTYPE_FD)
1058 return 0;
1059 last_media_present = (s->fd >= 0);
1060 if (s->fd >= 0 &&
1061 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1062 close(s->fd);
1063 s->fd = -1;
1064 raw_close_fd_pool(s);
1065 #ifdef DEBUG_FLOPPY
1066 printf("Floppy closed\n");
1067 #endif
1069 if (s->fd < 0) {
1070 if (s->fd_got_error &&
1071 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1072 #ifdef DEBUG_FLOPPY
1073 printf("No floppy (open delayed)\n");
1074 #endif
1075 return -EIO;
1077 s->fd = open(bs->filename, s->fd_open_flags);
1078 if (s->fd < 0) {
1079 s->fd_error_time = qemu_get_clock(rt_clock);
1080 s->fd_got_error = 1;
1081 if (last_media_present)
1082 s->fd_media_changed = 1;
1083 #ifdef DEBUG_FLOPPY
1084 printf("No floppy\n");
1085 #endif
1086 return -EIO;
1088 #ifdef DEBUG_FLOPPY
1089 printf("Floppy opened\n");
1090 #endif
1092 if (!last_media_present)
1093 s->fd_media_changed = 1;
1094 s->fd_open_time = qemu_get_clock(rt_clock);
1095 s->fd_got_error = 0;
1096 return 0;
1099 static int raw_is_inserted(BlockDriverState *bs)
1101 BDRVRawState *s = bs->opaque;
1102 int ret;
1104 switch(s->type) {
1105 case FTYPE_CD:
1106 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1107 if (ret == CDS_DISC_OK)
1108 return 1;
1109 else
1110 return 0;
1111 break;
1112 case FTYPE_FD:
1113 ret = fd_open(bs);
1114 return (ret >= 0);
1115 default:
1116 return 1;
1120 /* currently only used by fdc.c, but a CD version would be good too */
1121 static int raw_media_changed(BlockDriverState *bs)
1123 BDRVRawState *s = bs->opaque;
1125 switch(s->type) {
1126 case FTYPE_FD:
1128 int ret;
1129 /* XXX: we do not have a true media changed indication. It
1130 does not work if the floppy is changed without trying
1131 to read it */
1132 fd_open(bs);
1133 ret = s->fd_media_changed;
1134 s->fd_media_changed = 0;
1135 #ifdef DEBUG_FLOPPY
1136 printf("Floppy changed=%d\n", ret);
1137 #endif
1138 return ret;
1140 default:
1141 return -ENOTSUP;
1145 static int raw_eject(BlockDriverState *bs, int eject_flag)
1147 BDRVRawState *s = bs->opaque;
1149 switch(s->type) {
1150 case FTYPE_CD:
1151 if (eject_flag) {
1152 if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1153 perror("CDROMEJECT");
1154 } else {
1155 if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1156 perror("CDROMEJECT");
1158 break;
1159 case FTYPE_FD:
1161 int fd;
1162 if (s->fd >= 0) {
1163 close(s->fd);
1164 s->fd = -1;
1165 raw_close_fd_pool(s);
1167 fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1168 if (fd >= 0) {
1169 if (ioctl(fd, FDEJECT, 0) < 0)
1170 perror("FDEJECT");
1171 close(fd);
1174 break;
1175 default:
1176 return -ENOTSUP;
1178 return 0;
1181 static int raw_set_locked(BlockDriverState *bs, int locked)
1183 BDRVRawState *s = bs->opaque;
1185 switch(s->type) {
1186 case FTYPE_CD:
1187 if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1188 /* Note: an error can happen if the distribution automatically
1189 mounts the CD-ROM */
1190 // perror("CDROM_LOCKDOOR");
1192 break;
1193 default:
1194 return -ENOTSUP;
1196 return 0;
1199 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1201 BDRVRawState *s = bs->opaque;
1203 return ioctl(s->fd, req, buf);
1205 #else
1207 static int fd_open(BlockDriverState *bs)
1209 return 0;
1212 static int raw_is_inserted(BlockDriverState *bs)
1214 return 1;
1217 static int raw_media_changed(BlockDriverState *bs)
1219 return -ENOTSUP;
1222 static int raw_eject(BlockDriverState *bs, int eject_flag)
1224 return -ENOTSUP;
1227 static int raw_set_locked(BlockDriverState *bs, int locked)
1229 return -ENOTSUP;
1232 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1234 return -ENOTSUP;
1236 #endif /* !linux */
1238 BlockDriver bdrv_host_device = {
1239 "host_device",
1240 sizeof(BDRVRawState),
1241 NULL, /* no probe for protocols */
1242 hdev_open,
1243 NULL,
1244 NULL,
1245 raw_close,
1246 NULL,
1247 raw_flush,
1249 #ifdef CONFIG_AIO
1250 .bdrv_aio_read = raw_aio_read,
1251 .bdrv_aio_write = raw_aio_write,
1252 .bdrv_aio_cancel = raw_aio_cancel,
1253 .aiocb_size = sizeof(RawAIOCB),
1254 #endif
1255 .bdrv_pread = raw_pread,
1256 .bdrv_pwrite = raw_pwrite,
1257 .bdrv_getlength = raw_getlength,
1259 /* removable device support */
1260 .bdrv_is_inserted = raw_is_inserted,
1261 .bdrv_media_changed = raw_media_changed,
1262 .bdrv_eject = raw_eject,
1263 .bdrv_set_locked = raw_set_locked,
1264 /* generic scsi device */
1265 .bdrv_ioctl = raw_ioctl,