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"
25 #include "qemu-timer.h"
26 #include "qemu-char.h"
27 #include "block_int.h"
30 #include "posix-aio-compat.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>
62 #include <sys/ioctl.h>
63 #include <sys/disklabel.h>
68 #include <sys/ioctl.h>
69 #include <sys/diskslice.h>
72 //#define DEBUG_FLOPPY
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)
79 #define DEBUG_BLOCK_PRINT(formatCstr, ...)
82 /* OS X does not have O_DSYNC */
84 #define O_DSYNC O_SYNC
87 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
89 #define O_DIRECT O_DSYNC
96 #define ALIGNED_BUFFER_SIZE (32 * 512)
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
102 typedef struct BDRVRawState {
105 unsigned int lseek_err_cnt;
107 #if defined(__linux__)
108 /* linux floppy specific */
109 int64_t fd_open_time;
110 int64_t fd_error_time;
112 int fd_media_changed;
114 uint8_t* aligned_buf;
117 static int posix_aio_init(void);
119 static int fd_open(BlockDriverState *bs);
120 static int64_t raw_getlength(BlockDriverState *bs);
122 #if defined(__FreeBSD__)
123 static int cdrom_reopen(BlockDriverState *bs);
126 static int raw_open_common(BlockDriverState *bs, const char *filename,
127 int bdrv_flags, int open_flags)
129 BDRVRawState *s = bs->opaque;
134 s->lseek_err_cnt = 0;
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;
141 s->open_flags |= O_RDONLY;
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;
153 fd = open(filename, s->open_flags, 0644);
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) {
173 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
175 BDRVRawState *s = bs->opaque;
178 s->type = FTYPE_FILE;
179 if (flags & BDRV_O_CREAT)
180 open_flags = O_CREAT | O_TRUNC;
182 return raw_open_common(bs, filename, flags, open_flags);
185 /* XXX: use host sector size if necessary with:
186 #ifdef DIOCGSECTORSIZE
188 unsigned int sectorsize = 512;
189 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
190 sectorsize > bufsize)
191 bufsize = sectorsize;
195 u_int32_t blockSize = 512;
196 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
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.
206 * This function may be called without alignment if the caller ensures
207 * that O_DIRECT is not in effect.
209 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
210 uint8_t *buf, int count)
212 BDRVRawState *s = bs->opaque;
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));
231 ret = read(s->fd, buf, count);
233 goto label__raw_read__success;
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);
241 goto label__raw_read__success;
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));
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);
255 goto label__raw_read__success;
256 lseek(s->fd, offset, SEEK_SET);
257 ret = read(s->fd, buf, count);
259 goto label__raw_read__success;
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));
267 label__raw_read__success:
269 return (ret < 0) ? -errno : ret;
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.
276 * This function may be called without alignment if the caller ensures
277 * that O_DIRECT is not in effect.
279 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
280 const uint8_t *buf, int count)
282 BDRVRawState *s = bs->opaque;
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));
299 s->lseek_err_cnt = 0;
301 ret = write(s->fd, buf, count);
303 goto label__raw_write__success;
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));
310 label__raw_write__success:
312 return (ret < 0) ? -errno : ret;
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.
321 static int raw_pread(BlockDriverState *bs, int64_t offset,
322 uint8_t *buf, int count)
324 BDRVRawState *s = bs->opaque;
325 int size, ret, shift, sum;
329 if (s->aligned_buf != NULL) {
331 if (offset & 0x1ff) {
332 /* align offset on a 512 bytes boundary */
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);
345 memcpy(buf, s->aligned_buf + shift, size);
355 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
357 /* read on aligned buffer */
361 size = (count + 0x1ff) & ~0x1ff;
362 if (size > ALIGNED_BUFFER_SIZE)
363 size = ALIGNED_BUFFER_SIZE;
365 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
373 memcpy(buf, s->aligned_buf, size);
385 return raw_pread_aligned(bs, offset, buf, count) + sum;
388 static int raw_read(BlockDriverState *bs, int64_t sector_num,
389 uint8_t *buf, int nb_sectors)
393 ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
394 if (ret == (nb_sectors * 512))
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.
404 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
405 const uint8_t *buf, int count)
407 BDRVRawState *s = bs->opaque;
408 int size, ret, shift, sum;
412 if (s->aligned_buf != NULL) {
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);
424 memcpy(s->aligned_buf + shift, buf, size);
426 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
438 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
440 while ((size = (count & ~0x1ff)) != 0) {
442 if (size > ALIGNED_BUFFER_SIZE)
443 size = ALIGNED_BUFFER_SIZE;
445 memcpy(s->aligned_buf, buf, size);
447 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
456 /* here, count < 512 because (count & ~0x1ff) == 0 */
458 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
461 memcpy(s->aligned_buf, buf, count);
463 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
474 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
477 static int raw_write(BlockDriverState *bs, int64_t sector_num,
478 const uint8_t *buf, int nb_sectors)
481 ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
482 if (ret == (nb_sectors * 512))
488 /***********************************************************/
489 /* Unix AIO using POSIX AIO */
491 typedef struct RawAIOCB {
492 BlockDriverAIOCB common;
493 struct qemu_paiocb aiocb;
494 struct RawAIOCB *next;
498 typedef struct PosixAioState
504 static void posix_aio_read(void *opaque)
506 PosixAioState *s = opaque;
507 RawAIOCB *acb, **pacb;
511 /* read all bytes from signal pipe */
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 */
524 pacb = &s->first_aio;
529 ret = qemu_paio_error(&acb->aiocb);
530 if (ret == ECANCELED) {
531 /* remove the request */
533 qemu_aio_release(acb);
534 } else if (ret != EINPROGRESS) {
537 ret = qemu_paio_return(&acb->aiocb);
538 if (ret == acb->aiocb.aio_nbytes)
545 /* remove the request */
547 /* call the callback */
548 acb->common.cb(acb->common.opaque, ret);
549 qemu_aio_release(acb);
559 static int posix_aio_flush(void *opaque)
561 PosixAioState *s = opaque;
562 return !!s->first_aio;
565 static PosixAioState *posix_aio_state;
567 static void aio_signal_handler(int signum)
569 if (posix_aio_state) {
572 write(posix_aio_state->wfd, &byte, sizeof(byte));
578 static int posix_aio_init(void)
580 struct sigaction act;
583 struct qemu_paioinit ai;
588 s = qemu_malloc(sizeof(PosixAioState));
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);
596 if (pipe(fds) == -1) {
597 fprintf(stderr, "failed to create pipe\n");
604 fcntl(s->rfd, F_SETFL, O_NONBLOCK);
605 fcntl(s->wfd, F_SETFL, O_NONBLOCK);
607 qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
609 memset(&ai, 0, sizeof(ai));
619 static void raw_aio_remove(RawAIOCB *acb)
623 /* remove the callback from the queue */
624 pacb = &posix_aio_state->first_aio;
627 fprintf(stderr, "raw_aio_remove: aio request not found!\n");
629 } else if (*pacb == acb) {
631 qemu_aio_release(acb);
634 pacb = &(*pacb)->next;
638 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
641 RawAIOCB *acb = (RawAIOCB *)blockacb;
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
647 while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
653 static AIOPool raw_aio_pool = {
654 .aiocb_size = sizeof(RawAIOCB),
655 .cancel = raw_aio_cancel,
658 static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
659 QEMUIOVector *qiov, int nb_sectors,
660 BlockDriverCompletionFunc *cb, void *opaque)
662 BDRVRawState *s = bs->opaque;
668 acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque);
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;
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
685 acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED;
687 acb->next = posix_aio_state->first_aio;
688 posix_aio_state->first_aio = acb;
692 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
693 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
694 BlockDriverCompletionFunc *cb, void *opaque)
698 acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
701 if (qemu_paio_read(&acb->aiocb) < 0) {
708 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
709 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
710 BlockDriverCompletionFunc *cb, void *opaque)
714 acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
717 if (qemu_paio_write(&acb->aiocb) < 0) {
723 #else /* CONFIG_AIO */
724 static int posix_aio_init(void)
728 #endif /* CONFIG_AIO */
731 static void raw_close(BlockDriverState *bs)
733 BDRVRawState *s = bs->opaque;
737 if (s->aligned_buf != NULL)
738 qemu_free(s->aligned_buf);
742 static int raw_truncate(BlockDriverState *bs, int64_t offset)
744 BDRVRawState *s = bs->opaque;
745 if (s->type != FTYPE_FILE)
747 if (ftruncate(s->fd, offset) < 0)
753 static int64_t raw_getlength(BlockDriverState *bs)
755 BDRVRawState *s = bs->opaque;
761 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
764 if (ioctl(fd, DIOCGDINFO, &dl))
766 return (uint64_t)dl.d_secsize *
767 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
771 #else /* !__OpenBSD__ */
772 static int64_t raw_getlength(BlockDriverState *bs)
774 BDRVRawState *s = bs->opaque;
784 struct dk_minfo minfo;
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)
803 if (ioctl(fd, DIOCGPART, &pi) == 0)
804 size = pi.media_size;
811 size = LONG_LONG_MAX;
813 size = lseek(fd, 0LL, SEEK_END);
818 /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
819 if (size == 2048LL * (unsigned)-1)
821 /* XXX no disc? maybe we need to reopen... */
822 if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
832 * use the DKIOCGMEDIAINFO ioctl to read the size.
834 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
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 */
842 size = lseek(fd, 0, SEEK_END);
848 static int raw_create(const char *filename, QEMUOptionParameter *options)
851 int64_t total_size = 0;
853 /* Read out options */
854 while (options && options->name) {
855 if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
856 total_size = options->value.n / 512;
861 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
865 ftruncate(fd, total_size * 512);
870 static void raw_flush(BlockDriverState *bs)
872 BDRVRawState *s = bs->opaque;
877 static QEMUOptionParameter raw_create_options[] = {
879 .name = BLOCK_OPT_SIZE,
881 .help = "Virtual disk size"
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,
898 .bdrv_aio_readv = raw_aio_readv,
899 .bdrv_aio_writev = raw_aio_writev,
902 .bdrv_truncate = raw_truncate,
903 .bdrv_getlength = raw_getlength,
905 .create_options = raw_create_options,
908 /***********************************************/
912 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
913 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
915 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
917 kern_return_t kernResult;
918 mach_port_t masterPort;
919 CFMutableDictionaryRef classesToMatch;
921 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
922 if ( KERN_SUCCESS != kernResult ) {
923 printf( "IOMasterPort returned %d\n", kernResult );
926 classesToMatch = IOServiceMatching( kIOCDMediaClass );
927 if ( classesToMatch == NULL ) {
928 printf( "IOServiceMatching returned a NULL dictionary.\n" );
930 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
932 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
933 if ( KERN_SUCCESS != kernResult )
935 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
941 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
943 io_object_t nextMedia;
944 kern_return_t kernResult = KERN_FAILURE;
946 nextMedia = IOIteratorNext( mediaIterator );
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;
959 CFRelease( bsdPathAsCFString );
961 IOObjectRelease( nextMedia );
969 static int hdev_probe_device(const char *filename)
973 /* allow a dedicated CD-ROM driver to match with a higher priority */
974 if (strstart(filename, "/dev/cdrom", NULL))
977 if (stat(filename, &st) >= 0 &&
978 (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
985 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
987 BDRVRawState *s = bs->opaque;
990 if (strstart(filename, "/dev/cdrom", NULL)) {
991 kern_return_t kernResult;
992 io_iterator_t mediaIterator;
993 char bsdPath[ MAXPATHLEN ];
996 kernResult = FindEjectableCDMedia( &mediaIterator );
997 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
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);
1004 bsdPath[strlen(bsdPath)-1] = '1';
1011 if ( mediaIterator )
1012 IOObjectRelease( mediaIterator );
1016 s->type = FTYPE_FILE;
1017 #if defined(__linux__) && defined(CONFIG_AIO)
1018 if (strstart(filename, "/dev/sg", NULL)) {
1023 return raw_open_common(bs, filename, flags, 0);
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)
1032 BDRVRawState *s = bs->opaque;
1033 int last_media_present;
1035 if (s->type != FTYPE_FD)
1037 last_media_present = (s->fd >= 0);
1039 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1043 printf("Floppy closed\n");
1047 if (s->fd_got_error &&
1048 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1050 printf("No floppy (open delayed)\n");
1054 s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
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;
1061 printf("No floppy\n");
1066 printf("Floppy opened\n");
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;
1076 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1078 BDRVRawState *s = bs->opaque;
1080 return ioctl(s->fd, req, buf);
1084 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
1085 unsigned long int req, void *buf,
1086 BlockDriverCompletionFunc *cb, void *opaque)
1088 BDRVRawState *s = bs->opaque;
1091 if (fd_open(bs) < 0)
1094 acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque);
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;
1102 acb->next = posix_aio_state->first_aio;
1103 posix_aio_state->first_aio = acb;
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);
1112 return &acb->common;
1116 #elif defined(__FreeBSD__)
1117 static int fd_open(BlockDriverState *bs)
1119 BDRVRawState *s = bs->opaque;
1121 /* this is just to ensure s->fd is sane (its called by io ops) */
1126 #else /* !linux && !FreeBSD */
1128 static int fd_open(BlockDriverState *bs)
1133 #endif /* !linux && !FreeBSD */
1135 static int hdev_create(const char *filename, QEMUOptionParameter *options)
1139 struct stat stat_buf;
1140 int64_t total_size = 0;
1142 /* Read out options */
1143 while (options && options->name) {
1144 if (!strcmp(options->name, "size")) {
1145 total_size = options->value.n / 512;
1150 fd = open(filename, O_WRONLY | O_BINARY);
1154 if (fstat(fd, &stat_buf) < 0)
1156 else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
1158 else if (lseek(fd, 0, SEEK_END) < total_size * 512)
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,
1175 .bdrv_aio_readv = raw_aio_readv,
1176 .bdrv_aio_writev = raw_aio_writev,
1179 .bdrv_read = raw_read,
1180 .bdrv_write = raw_write,
1181 .bdrv_getlength = raw_getlength,
1183 /* generic scsi device */
1185 .bdrv_ioctl = hdev_ioctl,
1187 .bdrv_aio_ioctl = hdev_aio_ioctl,
1193 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1195 BDRVRawState *s = bs->opaque;
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);
1207 /* close fd so that we can reopen it as needed */
1210 s->fd_media_changed = 1;
1215 static int floppy_probe_device(const char *filename)
1217 if (strstart(filename, "/dev/fd", NULL))
1223 static int floppy_is_inserted(BlockDriverState *bs)
1225 return fd_open(bs) >= 0;
1228 static int floppy_media_changed(BlockDriverState *bs)
1230 BDRVRawState *s = bs->opaque;
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.
1238 ret = s->fd_media_changed;
1239 s->fd_media_changed = 0;
1241 printf("Floppy changed=%d\n", ret);
1246 static int floppy_eject(BlockDriverState *bs, int eject_flag)
1248 BDRVRawState *s = bs->opaque;
1255 fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1257 if (ioctl(fd, FDEJECT, 0) < 0)
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,
1275 .bdrv_aio_readv = raw_aio_readv,
1276 .bdrv_aio_writev = raw_aio_writev,
1279 .bdrv_read = raw_read,
1280 .bdrv_write = raw_write,
1281 .bdrv_getlength = raw_getlength,
1283 /* removable device support */
1284 .bdrv_is_inserted = floppy_is_inserted,
1285 .bdrv_media_changed = floppy_media_changed,
1286 .bdrv_eject = floppy_eject,
1289 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1291 BDRVRawState *s = bs->opaque;
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);
1299 static int cdrom_probe_device(const char *filename)
1301 if (strstart(filename, "/dev/cd", NULL))
1306 static int cdrom_is_inserted(BlockDriverState *bs)
1308 BDRVRawState *s = bs->opaque;
1311 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1312 if (ret == CDS_DISC_OK)
1317 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1319 BDRVRawState *s = bs->opaque;
1322 if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
1323 perror("CDROMEJECT");
1325 if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
1326 perror("CDROMEJECT");
1332 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1334 BDRVRawState *s = bs->opaque;
1336 if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
1338 * Note: an error can happen if the distribution automatically
1341 /* perror("CDROM_LOCKDOOR"); */
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,
1357 .bdrv_aio_readv = raw_aio_readv,
1358 .bdrv_aio_writev = raw_aio_writev,
1361 .bdrv_read = raw_read,
1362 .bdrv_write = raw_write,
1363 .bdrv_getlength = raw_getlength,
1365 /* removable device support */
1366 .bdrv_is_inserted = cdrom_is_inserted,
1367 .bdrv_eject = cdrom_eject,
1368 .bdrv_set_locked = cdrom_set_locked,
1370 /* generic scsi device */
1371 .bdrv_ioctl = hdev_ioctl,
1373 .bdrv_aio_ioctl = hdev_aio_ioctl,
1376 #endif /* __linux__ */
1379 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1381 BDRVRawState *s = bs->opaque;
1386 ret = raw_open_common(bs, filename, flags, 0);
1390 /* make sure the door isnt locked at this time */
1391 ioctl(s->fd, CDIOCALLOW);
1395 static int cdrom_probe_device(const char *filename)
1397 if (strstart(filename, "/dev/cd", NULL) ||
1398 strstart(filename, "/dev/acd", NULL))
1403 static int cdrom_reopen(BlockDriverState *bs)
1405 BDRVRawState *s = bs->opaque;
1409 * Force reread of possibly changed/newly loaded disc,
1410 * FreeBSD seems to not notice sometimes...
1414 fd = open(bs->filename, s->open_flags, 0644);
1421 /* make sure the door isnt locked at this time */
1422 ioctl(s->fd, CDIOCALLOW);
1426 static int cdrom_is_inserted(BlockDriverState *bs)
1428 return raw_getlength(bs) > 0;
1431 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1433 BDRVRawState *s = bs->opaque;
1438 (void) ioctl(s->fd, CDIOCALLOW);
1441 if (ioctl(s->fd, CDIOCEJECT) < 0)
1442 perror("CDIOCEJECT");
1444 if (ioctl(s->fd, CDIOCCLOSE) < 0)
1445 perror("CDIOCCLOSE");
1448 if (cdrom_reopen(bs) < 0)
1453 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1455 BDRVRawState *s = bs->opaque;
1459 if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1461 * Note: an error can happen if the distribution automatically
1464 /* perror("CDROM_LOCKDOOR"); */
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,
1480 .bdrv_aio_readv = raw_aio_readv,
1481 .bdrv_aio_writev = raw_aio_writev,
1484 .bdrv_read = raw_read,
1485 .bdrv_write = raw_write,
1486 .bdrv_getlength = raw_getlength,
1488 /* removable device support */
1489 .bdrv_is_inserted = cdrom_is_inserted,
1490 .bdrv_eject = cdrom_eject,
1491 .bdrv_set_locked = cdrom_set_locked,
1493 #endif /* __FreeBSD__ */
1495 static void bdrv_raw_init(void)
1498 * Register all the drivers. Note that order is important, the driver
1499 * registered last will get probed first.
1501 bdrv_register(&bdrv_raw);
1502 bdrv_register(&bdrv_host_device);
1504 bdrv_register(&bdrv_host_floppy);
1505 bdrv_register(&bdrv_host_cdrom);
1508 bdrv_register(&bdrv_host_cdrom);
1512 block_init(bdrv_raw_init);