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 s->type = FTYPE_FILE;
112 fd = open(filename, open_flags, 0644);
123 /* XXX: use host sector size if necessary with:
124 #ifdef DIOCGSECTORSIZE
126 unsigned int sectorsize = 512;
127 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
128 sectorsize > bufsize)
129 bufsize = sectorsize;
133 u_int32_t blockSize = 512;
134 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
140 static int raw_pread(BlockDriverState *bs, int64_t offset,
141 uint8_t *buf, int count)
143 BDRVRawState *s = bs->opaque;
150 if (lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
151 ++(s->lseek_err_cnt);
152 if(s->lseek_err_cnt <= 10) {
153 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
154 "] lseek failed : %d = %s\n",
155 s->fd, bs->filename, offset, buf, count,
156 bs->total_sectors, errno, strerror(errno));
162 ret = read(s->fd, buf, count);
164 goto label__raw_read__success;
166 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
167 "] read failed %d : %d = %s\n",
168 s->fd, bs->filename, offset, buf, count,
169 bs->total_sectors, ret, errno, strerror(errno));
171 /* Try harder for CDrom. */
172 if (bs->type == BDRV_TYPE_CDROM) {
173 lseek(s->fd, offset, SEEK_SET);
174 ret = read(s->fd, buf, count);
176 goto label__raw_read__success;
177 lseek(s->fd, offset, SEEK_SET);
178 ret = read(s->fd, buf, count);
180 goto label__raw_read__success;
182 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
183 "] retry read failed %d : %d = %s\n",
184 s->fd, bs->filename, offset, buf, count,
185 bs->total_sectors, ret, errno, strerror(errno));
188 label__raw_read__success:
193 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
194 const uint8_t *buf, int count)
196 BDRVRawState *s = bs->opaque;
203 if (lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
204 ++(s->lseek_err_cnt);
205 if(s->lseek_err_cnt) {
206 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
207 PRId64 "] lseek failed : %d = %s\n",
208 s->fd, bs->filename, offset, buf, count,
209 bs->total_sectors, errno, strerror(errno));
213 s->lseek_err_cnt = 0;
215 ret = write(s->fd, buf, count);
217 goto label__raw_write__success;
219 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
220 "] write failed %d : %d = %s\n",
221 s->fd, bs->filename, offset, buf, count,
222 bs->total_sectors, ret, errno, strerror(errno));
224 label__raw_write__success:
229 /***********************************************************/
230 /* Unix AIO using POSIX AIO */
232 typedef struct RawAIOCB {
233 BlockDriverAIOCB common;
235 struct RawAIOCB *next;
238 static int aio_sig_num = SIGUSR2;
239 static RawAIOCB *first_aio; /* AIO issued */
240 static int aio_initialized = 0;
242 static void aio_signal_handler(int signum)
245 CPUState *env = cpu_single_env;
247 /* stop the currently executing cpu because a timer occured */
248 cpu_interrupt(env, CPU_INTERRUPT_EXIT);
250 if (env->kqemu_enabled) {
251 kqemu_cpu_interrupt(env);
258 void qemu_aio_init(void)
260 struct sigaction act;
264 sigfillset(&act.sa_mask);
265 act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
266 act.sa_handler = aio_signal_handler;
267 sigaction(aio_sig_num, &act, NULL);
269 #if defined(__GLIBC__) && defined(__linux__)
271 /* XXX: aio thread exit seems to hang on RedHat 9 and this init
272 seems to fix the problem. */
274 memset(&ai, 0, sizeof(ai));
277 ai.aio_idle_time = 365 * 100000;
283 void qemu_aio_poll(void)
285 RawAIOCB *acb, **pacb;
294 ret = aio_error(&acb->aiocb);
295 if (ret == ECANCELED) {
296 /* remove the request */
298 qemu_aio_release(acb);
299 } else if (ret != EINPROGRESS) {
302 ret = aio_return(&acb->aiocb);
303 if (ret == acb->aiocb.aio_nbytes)
310 /* remove the request */
312 /* call the callback */
313 acb->common.cb(acb->common.opaque, ret);
314 qemu_aio_release(acb);
324 /* Wait for all IO requests to complete. */
325 void qemu_aio_flush(void)
327 qemu_aio_wait_start();
335 /* wait until at least one AIO was handled */
336 static sigset_t wait_oset;
338 void qemu_aio_wait_start(void)
342 if (!aio_initialized)
345 sigaddset(&set, aio_sig_num);
346 sigprocmask(SIG_BLOCK, &set, &wait_oset);
349 void qemu_aio_wait(void)
359 sigaddset(&set, aio_sig_num);
360 sigwait(&set, &nb_sigs);
364 void qemu_aio_wait_end(void)
366 sigprocmask(SIG_SETMASK, &wait_oset, NULL);
369 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
370 int64_t sector_num, uint8_t *buf, int nb_sectors,
371 BlockDriverCompletionFunc *cb, void *opaque)
373 BDRVRawState *s = bs->opaque;
379 acb = qemu_aio_get(bs, cb, opaque);
382 acb->aiocb.aio_fildes = s->fd;
383 acb->aiocb.aio_sigevent.sigev_signo = aio_sig_num;
384 acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
385 acb->aiocb.aio_buf = buf;
386 acb->aiocb.aio_nbytes = nb_sectors * 512;
387 acb->aiocb.aio_offset = sector_num * 512;
388 acb->next = first_aio;
393 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
394 int64_t sector_num, uint8_t *buf, int nb_sectors,
395 BlockDriverCompletionFunc *cb, void *opaque)
399 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
402 if (aio_read(&acb->aiocb) < 0) {
403 qemu_aio_release(acb);
409 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
410 int64_t sector_num, const uint8_t *buf, int nb_sectors,
411 BlockDriverCompletionFunc *cb, void *opaque)
415 acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
418 if (aio_write(&acb->aiocb) < 0) {
419 qemu_aio_release(acb);
425 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
428 RawAIOCB *acb = (RawAIOCB *)blockacb;
431 ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
432 if (ret == AIO_NOTCANCELED) {
433 /* fail safe: if the aio could not be canceled, we wait for
435 while (aio_error(&acb->aiocb) == EINPROGRESS);
438 /* remove the callback from the queue */
443 } else if (*pacb == acb) {
445 qemu_aio_release(acb);
452 static void raw_close(BlockDriverState *bs)
454 BDRVRawState *s = bs->opaque;
461 static int raw_truncate(BlockDriverState *bs, int64_t offset)
463 BDRVRawState *s = bs->opaque;
464 if (s->type != FTYPE_FILE)
466 if (ftruncate(s->fd, offset) < 0)
471 static int64_t raw_getlength(BlockDriverState *bs)
473 BDRVRawState *s = bs->opaque;
480 struct dk_minfo minfo;
490 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
491 #ifdef DIOCGMEDIASIZE
492 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
495 size = LONG_LONG_MAX;
497 size = lseek(fd, 0LL, SEEK_END);
503 * use the DKIOCGMEDIAINFO ioctl to read the size.
505 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
507 size = minfo.dki_lbsize * minfo.dki_capacity;
508 } else /* there are reports that lseek on some devices
509 fails, but irc discussion said that contingency
510 on contingency was overkill */
513 size = lseek(fd, 0, SEEK_END);
518 static int raw_create(const char *filename, int64_t total_size,
519 const char *backing_file, int flags)
523 if (flags || backing_file)
526 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
530 ftruncate(fd, total_size * 512);
535 static void raw_flush(BlockDriverState *bs)
537 BDRVRawState *s = bs->opaque;
541 BlockDriver bdrv_raw = {
543 sizeof(BDRVRawState),
544 NULL, /* no probe for protocols */
552 .bdrv_aio_read = raw_aio_read,
553 .bdrv_aio_write = raw_aio_write,
554 .bdrv_aio_cancel = raw_aio_cancel,
555 .aiocb_size = sizeof(RawAIOCB),
556 .protocol_name = "file",
557 .bdrv_pread = raw_pread,
558 .bdrv_pwrite = raw_pwrite,
559 .bdrv_truncate = raw_truncate,
560 .bdrv_getlength = raw_getlength,
563 /***********************************************/
567 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
568 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
570 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
572 kern_return_t kernResult;
573 mach_port_t masterPort;
574 CFMutableDictionaryRef classesToMatch;
576 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
577 if ( KERN_SUCCESS != kernResult ) {
578 printf( "IOMasterPort returned %d\n", kernResult );
581 classesToMatch = IOServiceMatching( kIOCDMediaClass );
582 if ( classesToMatch == NULL ) {
583 printf( "IOServiceMatching returned a NULL dictionary.\n" );
585 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
587 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
588 if ( KERN_SUCCESS != kernResult )
590 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
596 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
598 io_object_t nextMedia;
599 kern_return_t kernResult = KERN_FAILURE;
601 nextMedia = IOIteratorNext( mediaIterator );
604 CFTypeRef bsdPathAsCFString;
605 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
606 if ( bsdPathAsCFString ) {
607 size_t devPathLength;
608 strcpy( bsdPath, _PATH_DEV );
609 strcat( bsdPath, "r" );
610 devPathLength = strlen( bsdPath );
611 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
612 kernResult = KERN_SUCCESS;
614 CFRelease( bsdPathAsCFString );
616 IOObjectRelease( nextMedia );
624 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
626 BDRVRawState *s = bs->opaque;
627 int fd, open_flags, ret;
630 if (strstart(filename, "/dev/cdrom", NULL)) {
631 kern_return_t kernResult;
632 io_iterator_t mediaIterator;
633 char bsdPath[ MAXPATHLEN ];
636 kernResult = FindEjectableCDMedia( &mediaIterator );
637 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
639 if ( bsdPath[ 0 ] != '\0' ) {
640 strcat(bsdPath,"s0");
641 /* some CDs don't have a partition 0 */
642 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
644 bsdPath[strlen(bsdPath)-1] = '1';
652 IOObjectRelease( mediaIterator );
655 open_flags = O_BINARY;
656 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
657 open_flags |= O_RDWR;
659 open_flags |= O_RDONLY;
663 s->type = FTYPE_FILE;
664 #if defined(__linux__)
665 if (strstart(filename, "/dev/cd", NULL)) {
666 /* open will not fail even if no CD is inserted */
667 open_flags |= O_NONBLOCK;
669 } else if (strstart(filename, "/dev/fd", NULL)) {
671 s->fd_open_flags = open_flags;
672 /* open will not fail even if no floppy is inserted */
673 open_flags |= O_NONBLOCK;
676 fd = open(filename, open_flags, 0644);
684 #if defined(__linux__)
685 /* close fd so that we can reopen it as needed */
686 if (s->type == FTYPE_FD) {
689 s->fd_media_changed = 1;
695 #if defined(__linux__) && !defined(QEMU_IMG)
697 /* Note: we do not have a reliable method to detect if the floppy is
698 present. The current method is to try to open the floppy at every
699 I/O and to keep it opened during a few hundreds of ms. */
700 static int fd_open(BlockDriverState *bs)
702 BDRVRawState *s = bs->opaque;
703 int last_media_present;
705 if (s->type != FTYPE_FD)
707 last_media_present = (s->fd >= 0);
709 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
713 printf("Floppy closed\n");
717 if (s->fd_got_error &&
718 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
720 printf("No floppy (open delayed)\n");
724 s->fd = open(bs->filename, s->fd_open_flags);
726 s->fd_error_time = qemu_get_clock(rt_clock);
728 if (last_media_present)
729 s->fd_media_changed = 1;
731 printf("No floppy\n");
736 printf("Floppy opened\n");
739 if (!last_media_present)
740 s->fd_media_changed = 1;
741 s->fd_open_time = qemu_get_clock(rt_clock);
746 static int fd_open(BlockDriverState *bs)
752 #if defined(__linux__)
754 static int raw_is_inserted(BlockDriverState *bs)
756 BDRVRawState *s = bs->opaque;
761 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
762 if (ret == CDS_DISC_OK)
775 /* currently only used by fdc.c, but a CD version would be good too */
776 static int raw_media_changed(BlockDriverState *bs)
778 BDRVRawState *s = bs->opaque;
784 /* XXX: we do not have a true media changed indication. It
785 does not work if the floppy is changed without trying
788 ret = s->fd_media_changed;
789 s->fd_media_changed = 0;
791 printf("Floppy changed=%d\n", ret);
800 static int raw_eject(BlockDriverState *bs, int eject_flag)
802 BDRVRawState *s = bs->opaque;
807 if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
808 perror("CDROMEJECT");
810 if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
811 perror("CDROMEJECT");
821 fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
823 if (ioctl(fd, FDEJECT, 0) < 0)
835 static int raw_set_locked(BlockDriverState *bs, int locked)
837 BDRVRawState *s = bs->opaque;
841 if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
842 /* Note: an error can happen if the distribution automatically
844 // perror("CDROM_LOCKDOOR");
855 static int raw_is_inserted(BlockDriverState *bs)
860 static int raw_media_changed(BlockDriverState *bs)
865 static int raw_eject(BlockDriverState *bs, int eject_flag)
870 static int raw_set_locked(BlockDriverState *bs, int locked)
877 BlockDriver bdrv_host_device = {
879 sizeof(BDRVRawState),
880 NULL, /* no probe for protocols */
888 .bdrv_aio_read = raw_aio_read,
889 .bdrv_aio_write = raw_aio_write,
890 .bdrv_aio_cancel = raw_aio_cancel,
891 .aiocb_size = sizeof(RawAIOCB),
892 .bdrv_pread = raw_pread,
893 .bdrv_pwrite = raw_pwrite,
894 .bdrv_getlength = raw_getlength,
896 /* removable device support */
897 .bdrv_is_inserted = raw_is_inserted,
898 .bdrv_media_changed = raw_media_changed,
899 .bdrv_eject = raw_eject,
900 .bdrv_set_locked = raw_set_locked,