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 (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 (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;
390 acb->aiocb.aio_nbytes = nb_sectors * 512;
391 acb->aiocb.aio_offset = sector_num * 512;
392 acb->next = first_aio;
397 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
398 int64_t sector_num, uint8_t *buf, int nb_sectors,
399 BlockDriverCompletionFunc *cb, void *opaque)
403 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
406 if (aio_read(&acb->aiocb) < 0) {
407 qemu_aio_release(acb);
413 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
414 int64_t sector_num, const uint8_t *buf, int nb_sectors,
415 BlockDriverCompletionFunc *cb, void *opaque)
419 acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
422 if (aio_write(&acb->aiocb) < 0) {
423 qemu_aio_release(acb);
429 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
432 RawAIOCB *acb = (RawAIOCB *)blockacb;
435 ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
436 if (ret == AIO_NOTCANCELED) {
437 /* fail safe: if the aio could not be canceled, we wait for
439 while (aio_error(&acb->aiocb) == EINPROGRESS);
442 /* remove the callback from the queue */
447 } else if (*pacb == acb) {
449 qemu_aio_release(acb);
456 static void raw_close(BlockDriverState *bs)
458 BDRVRawState *s = bs->opaque;
465 static int raw_truncate(BlockDriverState *bs, int64_t offset)
467 BDRVRawState *s = bs->opaque;
468 if (s->type != FTYPE_FILE)
470 if (ftruncate(s->fd, offset) < 0)
475 static int64_t raw_getlength(BlockDriverState *bs)
477 BDRVRawState *s = bs->opaque;
484 struct dk_minfo minfo;
494 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
495 #ifdef DIOCGMEDIASIZE
496 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
499 size = LONG_LONG_MAX;
501 size = lseek(fd, 0LL, SEEK_END);
507 * use the DKIOCGMEDIAINFO ioctl to read the size.
509 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
511 size = minfo.dki_lbsize * minfo.dki_capacity;
512 } else /* there are reports that lseek on some devices
513 fails, but irc discussion said that contingency
514 on contingency was overkill */
517 size = lseek(fd, 0, SEEK_END);
522 static int raw_create(const char *filename, int64_t total_size,
523 const char *backing_file, int flags)
527 if (flags || backing_file)
530 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
534 ftruncate(fd, total_size * 512);
539 static void raw_flush(BlockDriverState *bs)
541 BDRVRawState *s = bs->opaque;
545 BlockDriver bdrv_raw = {
547 sizeof(BDRVRawState),
548 NULL, /* no probe for protocols */
556 .bdrv_aio_read = raw_aio_read,
557 .bdrv_aio_write = raw_aio_write,
558 .bdrv_aio_cancel = raw_aio_cancel,
559 .aiocb_size = sizeof(RawAIOCB),
560 .protocol_name = "file",
561 .bdrv_pread = raw_pread,
562 .bdrv_pwrite = raw_pwrite,
563 .bdrv_truncate = raw_truncate,
564 .bdrv_getlength = raw_getlength,
567 /***********************************************/
571 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
572 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
574 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
576 kern_return_t kernResult;
577 mach_port_t masterPort;
578 CFMutableDictionaryRef classesToMatch;
580 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
581 if ( KERN_SUCCESS != kernResult ) {
582 printf( "IOMasterPort returned %d\n", kernResult );
585 classesToMatch = IOServiceMatching( kIOCDMediaClass );
586 if ( classesToMatch == NULL ) {
587 printf( "IOServiceMatching returned a NULL dictionary.\n" );
589 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
591 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
592 if ( KERN_SUCCESS != kernResult )
594 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
600 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
602 io_object_t nextMedia;
603 kern_return_t kernResult = KERN_FAILURE;
605 nextMedia = IOIteratorNext( mediaIterator );
608 CFTypeRef bsdPathAsCFString;
609 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
610 if ( bsdPathAsCFString ) {
611 size_t devPathLength;
612 strcpy( bsdPath, _PATH_DEV );
613 strcat( bsdPath, "r" );
614 devPathLength = strlen( bsdPath );
615 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
616 kernResult = KERN_SUCCESS;
618 CFRelease( bsdPathAsCFString );
620 IOObjectRelease( nextMedia );
628 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
630 BDRVRawState *s = bs->opaque;
631 int fd, open_flags, ret;
634 if (strstart(filename, "/dev/cdrom", NULL)) {
635 kern_return_t kernResult;
636 io_iterator_t mediaIterator;
637 char bsdPath[ MAXPATHLEN ];
640 kernResult = FindEjectableCDMedia( &mediaIterator );
641 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
643 if ( bsdPath[ 0 ] != '\0' ) {
644 strcat(bsdPath,"s0");
645 /* some CDs don't have a partition 0 */
646 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
648 bsdPath[strlen(bsdPath)-1] = '1';
656 IOObjectRelease( mediaIterator );
659 open_flags = O_BINARY;
660 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
661 open_flags |= O_RDWR;
663 open_flags |= O_RDONLY;
667 if (flags & BDRV_O_DIRECT)
668 open_flags |= O_DIRECT;
671 s->type = FTYPE_FILE;
672 #if defined(__linux__)
673 if (strstart(filename, "/dev/cd", NULL)) {
674 /* open will not fail even if no CD is inserted */
675 open_flags |= O_NONBLOCK;
677 } else if (strstart(filename, "/dev/fd", NULL)) {
679 s->fd_open_flags = open_flags;
680 /* open will not fail even if no floppy is inserted */
681 open_flags |= O_NONBLOCK;
684 fd = open(filename, open_flags, 0644);
692 #if defined(__linux__)
693 /* close fd so that we can reopen it as needed */
694 if (s->type == FTYPE_FD) {
697 s->fd_media_changed = 1;
703 #if defined(__linux__) && !defined(QEMU_IMG)
705 /* Note: we do not have a reliable method to detect if the floppy is
706 present. The current method is to try to open the floppy at every
707 I/O and to keep it opened during a few hundreds of ms. */
708 static int fd_open(BlockDriverState *bs)
710 BDRVRawState *s = bs->opaque;
711 int last_media_present;
713 if (s->type != FTYPE_FD)
715 last_media_present = (s->fd >= 0);
717 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
721 printf("Floppy closed\n");
725 if (s->fd_got_error &&
726 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
728 printf("No floppy (open delayed)\n");
732 s->fd = open(bs->filename, s->fd_open_flags);
734 s->fd_error_time = qemu_get_clock(rt_clock);
736 if (last_media_present)
737 s->fd_media_changed = 1;
739 printf("No floppy\n");
744 printf("Floppy opened\n");
747 if (!last_media_present)
748 s->fd_media_changed = 1;
749 s->fd_open_time = qemu_get_clock(rt_clock);
754 static int fd_open(BlockDriverState *bs)
760 #if defined(__linux__)
762 static int raw_is_inserted(BlockDriverState *bs)
764 BDRVRawState *s = bs->opaque;
769 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
770 if (ret == CDS_DISC_OK)
783 /* currently only used by fdc.c, but a CD version would be good too */
784 static int raw_media_changed(BlockDriverState *bs)
786 BDRVRawState *s = bs->opaque;
792 /* XXX: we do not have a true media changed indication. It
793 does not work if the floppy is changed without trying
796 ret = s->fd_media_changed;
797 s->fd_media_changed = 0;
799 printf("Floppy changed=%d\n", ret);
808 static int raw_eject(BlockDriverState *bs, int eject_flag)
810 BDRVRawState *s = bs->opaque;
815 if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
816 perror("CDROMEJECT");
818 if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
819 perror("CDROMEJECT");
829 fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
831 if (ioctl(fd, FDEJECT, 0) < 0)
843 static int raw_set_locked(BlockDriverState *bs, int locked)
845 BDRVRawState *s = bs->opaque;
849 if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
850 /* Note: an error can happen if the distribution automatically
852 // perror("CDROM_LOCKDOOR");
863 static int raw_is_inserted(BlockDriverState *bs)
868 static int raw_media_changed(BlockDriverState *bs)
873 static int raw_eject(BlockDriverState *bs, int eject_flag)
878 static int raw_set_locked(BlockDriverState *bs, int locked)
885 BlockDriver bdrv_host_device = {
887 sizeof(BDRVRawState),
888 NULL, /* no probe for protocols */
896 .bdrv_aio_read = raw_aio_read,
897 .bdrv_aio_write = raw_aio_write,
898 .bdrv_aio_cancel = raw_aio_cancel,
899 .aiocb_size = sizeof(RawAIOCB),
900 .bdrv_pread = raw_pread,
901 .bdrv_pwrite = raw_pwrite,
902 .bdrv_getlength = raw_getlength,
904 /* removable device support */
905 .bdrv_is_inserted = raw_is_inserted,
906 .bdrv_media_changed = raw_media_changed,
907 .bdrv_eject = raw_eject,
908 .bdrv_set_locked = raw_set_locked,