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
24 #include "qemu-common.h"
26 #include "qemu-timer.h"
29 #include "block_int.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>
46 #define _POSIX_PTHREAD_SEMANTICS 1
51 #include <sys/ioctl.h>
52 #include <linux/cdrom.h>
59 //#define DEBUG_FLOPPY
62 #if defined(DEBUG_BLOCK) && !defined(QEMU_IMG)
63 #define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \
64 { fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0)
66 #define DEBUG_BLOCK_PRINT(formatCstr, args...)
73 /* if the FD is not accessed during that time (in ms), we try to
74 reopen it to see if the disk has been changed */
75 #define FD_OPEN_TIMEOUT 1000
77 typedef struct BDRVRawState {
80 unsigned int lseek_err_cnt;
81 #if defined(__linux__)
82 /* linux floppy specific */
85 int64_t fd_error_time;
91 static int fd_open(BlockDriverState *bs);
93 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
95 BDRVRawState *s = bs->opaque;
96 int fd, open_flags, ret;
100 open_flags = O_BINARY;
101 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
102 open_flags |= O_RDWR;
104 open_flags |= O_RDONLY;
107 if (flags & BDRV_O_CREAT)
108 open_flags |= O_CREAT | O_TRUNC;
110 if (flags & BDRV_O_DIRECT)
111 open_flags |= O_DIRECT;
114 s->type = FTYPE_FILE;
116 fd = open(filename, open_flags, 0644);
127 /* XXX: use host sector size if necessary with:
128 #ifdef DIOCGSECTORSIZE
130 unsigned int sectorsize = 512;
131 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
132 sectorsize > bufsize)
133 bufsize = sectorsize;
137 u_int32_t blockSize = 512;
138 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
144 static int raw_pread(BlockDriverState *bs, int64_t offset,
145 uint8_t *buf, int count)
147 BDRVRawState *s = bs->opaque;
154 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
155 ++(s->lseek_err_cnt);
156 if(s->lseek_err_cnt <= 10) {
157 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
158 "] lseek failed : %d = %s\n",
159 s->fd, bs->filename, offset, buf, count,
160 bs->total_sectors, errno, strerror(errno));
166 ret = read(s->fd, buf, count);
168 goto label__raw_read__success;
170 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
171 "] read failed %d : %d = %s\n",
172 s->fd, bs->filename, offset, buf, count,
173 bs->total_sectors, ret, errno, strerror(errno));
175 /* Try harder for CDrom. */
176 if (bs->type == BDRV_TYPE_CDROM) {
177 lseek(s->fd, offset, SEEK_SET);
178 ret = read(s->fd, buf, count);
180 goto label__raw_read__success;
181 lseek(s->fd, offset, SEEK_SET);
182 ret = read(s->fd, buf, count);
184 goto label__raw_read__success;
186 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
187 "] retry read failed %d : %d = %s\n",
188 s->fd, bs->filename, offset, buf, count,
189 bs->total_sectors, ret, errno, strerror(errno));
192 label__raw_read__success:
197 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
198 const uint8_t *buf, int count)
200 BDRVRawState *s = bs->opaque;
207 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
208 ++(s->lseek_err_cnt);
209 if(s->lseek_err_cnt) {
210 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
211 PRId64 "] lseek failed : %d = %s\n",
212 s->fd, bs->filename, offset, buf, count,
213 bs->total_sectors, errno, strerror(errno));
217 s->lseek_err_cnt = 0;
219 ret = write(s->fd, buf, count);
221 goto label__raw_write__success;
223 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
224 "] write failed %d : %d = %s\n",
225 s->fd, bs->filename, offset, buf, count,
226 bs->total_sectors, ret, errno, strerror(errno));
228 label__raw_write__success:
233 /***********************************************************/
234 /* Unix AIO using POSIX AIO */
236 typedef struct RawAIOCB {
237 BlockDriverAIOCB common;
239 struct RawAIOCB *next;
242 static int aio_sig_num = SIGUSR2;
243 static RawAIOCB *first_aio; /* AIO issued */
244 static int aio_initialized = 0;
246 static void aio_signal_handler(int signum)
249 CPUState *env = cpu_single_env;
251 /* stop the currently executing cpu because a timer occured */
252 cpu_interrupt(env, CPU_INTERRUPT_EXIT);
254 if (env->kqemu_enabled) {
255 kqemu_cpu_interrupt(env);
262 void qemu_aio_init(void)
264 struct sigaction act;
268 sigfillset(&act.sa_mask);
269 act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
270 act.sa_handler = aio_signal_handler;
271 sigaction(aio_sig_num, &act, NULL);
273 #if defined(__GLIBC__) && defined(__linux__)
275 /* XXX: aio thread exit seems to hang on RedHat 9 and this init
276 seems to fix the problem. */
278 memset(&ai, 0, sizeof(ai));
281 ai.aio_idle_time = 365 * 100000;
287 void qemu_aio_poll(void)
289 RawAIOCB *acb, **pacb;
298 ret = aio_error(&acb->aiocb);
299 if (ret == ECANCELED) {
300 /* remove the request */
302 qemu_aio_release(acb);
303 } else if (ret != EINPROGRESS) {
306 ret = aio_return(&acb->aiocb);
307 if (ret == acb->aiocb.aio_nbytes)
314 /* remove the request */
316 /* call the callback */
317 acb->common.cb(acb->common.opaque, ret);
318 qemu_aio_release(acb);
328 /* Wait for all IO requests to complete. */
329 void qemu_aio_flush(void)
331 qemu_aio_wait_start();
339 /* wait until at least one AIO was handled */
340 static sigset_t wait_oset;
342 void qemu_aio_wait_start(void)
346 if (!aio_initialized)
349 sigaddset(&set, aio_sig_num);
350 sigprocmask(SIG_BLOCK, &set, &wait_oset);
353 void qemu_aio_wait(void)
363 sigaddset(&set, aio_sig_num);
364 sigwait(&set, &nb_sigs);
368 void qemu_aio_wait_end(void)
370 sigprocmask(SIG_SETMASK, &wait_oset, NULL);
373 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
374 int64_t sector_num, uint8_t *buf, int nb_sectors,
375 BlockDriverCompletionFunc *cb, void *opaque)
377 BDRVRawState *s = bs->opaque;
383 acb = qemu_aio_get(bs, cb, opaque);
386 acb->aiocb.aio_fildes = s->fd;
387 acb->aiocb.aio_sigevent.sigev_signo = aio_sig_num;
388 acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
389 acb->aiocb.aio_buf = buf;
391 acb->aiocb.aio_nbytes = -nb_sectors;
393 acb->aiocb.aio_nbytes = nb_sectors * 512;
394 acb->aiocb.aio_offset = sector_num * 512;
395 acb->next = first_aio;
400 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
401 int64_t sector_num, uint8_t *buf, int nb_sectors,
402 BlockDriverCompletionFunc *cb, void *opaque)
406 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
409 if (aio_read(&acb->aiocb) < 0) {
410 qemu_aio_release(acb);
416 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
417 int64_t sector_num, const uint8_t *buf, int nb_sectors,
418 BlockDriverCompletionFunc *cb, void *opaque)
422 acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
425 if (aio_write(&acb->aiocb) < 0) {
426 qemu_aio_release(acb);
432 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
435 RawAIOCB *acb = (RawAIOCB *)blockacb;
438 ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
439 if (ret == AIO_NOTCANCELED) {
440 /* fail safe: if the aio could not be canceled, we wait for
442 while (aio_error(&acb->aiocb) == EINPROGRESS);
445 /* remove the callback from the queue */
450 } else if (*pacb == acb) {
452 qemu_aio_release(acb);
459 static void raw_close(BlockDriverState *bs)
461 BDRVRawState *s = bs->opaque;
468 static int raw_truncate(BlockDriverState *bs, int64_t offset)
470 BDRVRawState *s = bs->opaque;
471 if (s->type != FTYPE_FILE)
473 if (ftruncate(s->fd, offset) < 0)
478 static int64_t raw_getlength(BlockDriverState *bs)
480 BDRVRawState *s = bs->opaque;
487 struct dk_minfo minfo;
497 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
498 #ifdef DIOCGMEDIASIZE
499 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
502 size = LONG_LONG_MAX;
504 size = lseek(fd, 0LL, SEEK_END);
510 * use the DKIOCGMEDIAINFO ioctl to read the size.
512 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
514 size = minfo.dki_lbsize * minfo.dki_capacity;
515 } else /* there are reports that lseek on some devices
516 fails, but irc discussion said that contingency
517 on contingency was overkill */
520 size = lseek(fd, 0, SEEK_END);
525 static int raw_create(const char *filename, int64_t total_size,
526 const char *backing_file, int flags)
530 if (flags || backing_file)
533 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
537 ftruncate(fd, total_size * 512);
542 static void raw_flush(BlockDriverState *bs)
544 BDRVRawState *s = bs->opaque;
548 BlockDriver bdrv_raw = {
550 sizeof(BDRVRawState),
551 NULL, /* no probe for protocols */
559 .bdrv_aio_read = raw_aio_read,
560 .bdrv_aio_write = raw_aio_write,
561 .bdrv_aio_cancel = raw_aio_cancel,
562 .aiocb_size = sizeof(RawAIOCB),
563 .protocol_name = "file",
564 .bdrv_pread = raw_pread,
565 .bdrv_pwrite = raw_pwrite,
566 .bdrv_truncate = raw_truncate,
567 .bdrv_getlength = raw_getlength,
570 /***********************************************/
574 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
575 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
577 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
579 kern_return_t kernResult;
580 mach_port_t masterPort;
581 CFMutableDictionaryRef classesToMatch;
583 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
584 if ( KERN_SUCCESS != kernResult ) {
585 printf( "IOMasterPort returned %d\n", kernResult );
588 classesToMatch = IOServiceMatching( kIOCDMediaClass );
589 if ( classesToMatch == NULL ) {
590 printf( "IOServiceMatching returned a NULL dictionary.\n" );
592 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
594 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
595 if ( KERN_SUCCESS != kernResult )
597 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
603 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
605 io_object_t nextMedia;
606 kern_return_t kernResult = KERN_FAILURE;
608 nextMedia = IOIteratorNext( mediaIterator );
611 CFTypeRef bsdPathAsCFString;
612 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
613 if ( bsdPathAsCFString ) {
614 size_t devPathLength;
615 strcpy( bsdPath, _PATH_DEV );
616 strcat( bsdPath, "r" );
617 devPathLength = strlen( bsdPath );
618 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
619 kernResult = KERN_SUCCESS;
621 CFRelease( bsdPathAsCFString );
623 IOObjectRelease( nextMedia );
631 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
633 BDRVRawState *s = bs->opaque;
634 int fd, open_flags, ret;
637 if (strstart(filename, "/dev/cdrom", NULL)) {
638 kern_return_t kernResult;
639 io_iterator_t mediaIterator;
640 char bsdPath[ MAXPATHLEN ];
643 kernResult = FindEjectableCDMedia( &mediaIterator );
644 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
646 if ( bsdPath[ 0 ] != '\0' ) {
647 strcat(bsdPath,"s0");
648 /* some CDs don't have a partition 0 */
649 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
651 bsdPath[strlen(bsdPath)-1] = '1';
659 IOObjectRelease( mediaIterator );
662 open_flags = O_BINARY;
663 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
664 open_flags |= O_RDWR;
666 open_flags |= O_RDONLY;
670 if (flags & BDRV_O_DIRECT)
671 open_flags |= O_DIRECT;
674 s->type = FTYPE_FILE;
675 #if defined(__linux__)
676 if (strstart(filename, "/dev/cd", NULL)) {
677 /* open will not fail even if no CD is inserted */
678 open_flags |= O_NONBLOCK;
680 } else if (strstart(filename, "/dev/fd", NULL)) {
682 s->fd_open_flags = open_flags;
683 /* open will not fail even if no floppy is inserted */
684 open_flags |= O_NONBLOCK;
685 } else if (strstart(filename, "/dev/sg", NULL)) {
689 fd = open(filename, open_flags, 0644);
697 #if defined(__linux__)
698 /* close fd so that we can reopen it as needed */
699 if (s->type == FTYPE_FD) {
702 s->fd_media_changed = 1;
708 #if defined(__linux__) && !defined(QEMU_IMG)
710 /* Note: we do not have a reliable method to detect if the floppy is
711 present. The current method is to try to open the floppy at every
712 I/O and to keep it opened during a few hundreds of ms. */
713 static int fd_open(BlockDriverState *bs)
715 BDRVRawState *s = bs->opaque;
716 int last_media_present;
718 if (s->type != FTYPE_FD)
720 last_media_present = (s->fd >= 0);
722 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
726 printf("Floppy closed\n");
730 if (s->fd_got_error &&
731 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
733 printf("No floppy (open delayed)\n");
737 s->fd = open(bs->filename, s->fd_open_flags);
739 s->fd_error_time = qemu_get_clock(rt_clock);
741 if (last_media_present)
742 s->fd_media_changed = 1;
744 printf("No floppy\n");
749 printf("Floppy opened\n");
752 if (!last_media_present)
753 s->fd_media_changed = 1;
754 s->fd_open_time = qemu_get_clock(rt_clock);
759 static int fd_open(BlockDriverState *bs)
765 #if defined(__linux__)
767 static int raw_is_inserted(BlockDriverState *bs)
769 BDRVRawState *s = bs->opaque;
774 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
775 if (ret == CDS_DISC_OK)
788 /* currently only used by fdc.c, but a CD version would be good too */
789 static int raw_media_changed(BlockDriverState *bs)
791 BDRVRawState *s = bs->opaque;
797 /* XXX: we do not have a true media changed indication. It
798 does not work if the floppy is changed without trying
801 ret = s->fd_media_changed;
802 s->fd_media_changed = 0;
804 printf("Floppy changed=%d\n", ret);
813 static int raw_eject(BlockDriverState *bs, int eject_flag)
815 BDRVRawState *s = bs->opaque;
820 if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
821 perror("CDROMEJECT");
823 if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
824 perror("CDROMEJECT");
834 fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
836 if (ioctl(fd, FDEJECT, 0) < 0)
848 static int raw_set_locked(BlockDriverState *bs, int locked)
850 BDRVRawState *s = bs->opaque;
854 if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
855 /* Note: an error can happen if the distribution automatically
857 // perror("CDROM_LOCKDOOR");
866 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
868 BDRVRawState *s = bs->opaque;
870 return ioctl(s->fd, req, buf);
874 static int raw_is_inserted(BlockDriverState *bs)
879 static int raw_media_changed(BlockDriverState *bs)
884 static int raw_eject(BlockDriverState *bs, int eject_flag)
889 static int raw_set_locked(BlockDriverState *bs, int locked)
894 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
900 BlockDriver bdrv_host_device = {
902 sizeof(BDRVRawState),
903 NULL, /* no probe for protocols */
911 .bdrv_aio_read = raw_aio_read,
912 .bdrv_aio_write = raw_aio_write,
913 .bdrv_aio_cancel = raw_aio_cancel,
914 .aiocb_size = sizeof(RawAIOCB),
915 .bdrv_pread = raw_pread,
916 .bdrv_pwrite = raw_pwrite,
917 .bdrv_getlength = raw_getlength,
919 /* removable device support */
920 .bdrv_is_inserted = raw_is_inserted,
921 .bdrv_media_changed = raw_media_changed,
922 .bdrv_eject = raw_eject,
923 .bdrv_set_locked = raw_set_locked,
924 /* generic scsi device */
925 .bdrv_ioctl = raw_ioctl,