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);
121 #if defined(__FreeBSD__)
122 static int cd_open(BlockDriverState *bs);
125 static int raw_is_inserted(BlockDriverState *bs);
127 static int raw_open_common(BlockDriverState *bs, const char *filename,
130 BDRVRawState *s = bs->opaque;
135 s->lseek_err_cnt = 0;
137 s->open_flags |= O_BINARY;
138 if ((flags & BDRV_O_ACCESS) == 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 ((flags & BDRV_O_NOCACHE))
148 s->open_flags |= O_DIRECT;
149 else if (!(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 ((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;
177 s->type = FTYPE_FILE;
178 if (flags & BDRV_O_CREAT)
179 s->open_flags |= O_CREAT | O_TRUNC;
181 return raw_open_common(bs, filename, flags);
184 /* XXX: use host sector size if necessary with:
185 #ifdef DIOCGSECTORSIZE
187 unsigned int sectorsize = 512;
188 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
189 sectorsize > bufsize)
190 bufsize = sectorsize;
194 u_int32_t blockSize = 512;
195 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
202 * offset and count are in bytes, but must be multiples of 512 for files
203 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
205 * This function may be called without alignment if the caller ensures
206 * that O_DIRECT is not in effect.
208 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
209 uint8_t *buf, int count)
211 BDRVRawState *s = bs->opaque;
218 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
219 ++(s->lseek_err_cnt);
220 if(s->lseek_err_cnt <= 10) {
221 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
222 "] lseek failed : %d = %s\n",
223 s->fd, bs->filename, offset, buf, count,
224 bs->total_sectors, errno, strerror(errno));
230 ret = read(s->fd, buf, count);
232 goto label__raw_read__success;
234 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
235 "] read failed %d : %d = %s\n",
236 s->fd, bs->filename, offset, buf, count,
237 bs->total_sectors, ret, errno, strerror(errno));
239 /* Try harder for CDrom. */
240 if (bs->type == BDRV_TYPE_CDROM) {
241 lseek(s->fd, offset, SEEK_SET);
242 ret = read(s->fd, buf, count);
244 goto label__raw_read__success;
245 lseek(s->fd, offset, SEEK_SET);
246 ret = read(s->fd, buf, count);
248 goto label__raw_read__success;
250 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
251 "] retry read failed %d : %d = %s\n",
252 s->fd, bs->filename, offset, buf, count,
253 bs->total_sectors, ret, errno, strerror(errno));
256 label__raw_read__success:
258 return (ret < 0) ? -errno : ret;
262 * offset and count are in bytes, but must be multiples of 512 for files
263 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
265 * This function may be called without alignment if the caller ensures
266 * that O_DIRECT is not in effect.
268 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
269 const uint8_t *buf, int count)
271 BDRVRawState *s = bs->opaque;
278 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
279 ++(s->lseek_err_cnt);
280 if(s->lseek_err_cnt) {
281 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
282 PRId64 "] lseek failed : %d = %s\n",
283 s->fd, bs->filename, offset, buf, count,
284 bs->total_sectors, errno, strerror(errno));
288 s->lseek_err_cnt = 0;
290 ret = write(s->fd, buf, count);
292 goto label__raw_write__success;
294 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
295 "] write failed %d : %d = %s\n",
296 s->fd, bs->filename, offset, buf, count,
297 bs->total_sectors, ret, errno, strerror(errno));
299 label__raw_write__success:
301 return (ret < 0) ? -errno : ret;
306 * offset and count are in bytes and possibly not aligned. For files opened
307 * with O_DIRECT, necessary alignments are ensured before calling
308 * raw_pread_aligned to do the actual read.
310 static int raw_pread(BlockDriverState *bs, int64_t offset,
311 uint8_t *buf, int count)
313 BDRVRawState *s = bs->opaque;
314 int size, ret, shift, sum;
318 if (s->aligned_buf != NULL) {
320 if (offset & 0x1ff) {
321 /* align offset on a 512 bytes boundary */
323 shift = offset & 0x1ff;
324 size = (shift + count + 0x1ff) & ~0x1ff;
325 if (size > ALIGNED_BUFFER_SIZE)
326 size = ALIGNED_BUFFER_SIZE;
327 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
334 memcpy(buf, s->aligned_buf + shift, size);
344 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
346 /* read on aligned buffer */
350 size = (count + 0x1ff) & ~0x1ff;
351 if (size > ALIGNED_BUFFER_SIZE)
352 size = ALIGNED_BUFFER_SIZE;
354 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
362 memcpy(buf, s->aligned_buf, size);
374 return raw_pread_aligned(bs, offset, buf, count) + sum;
377 static int raw_read(BlockDriverState *bs, int64_t sector_num,
378 uint8_t *buf, int nb_sectors)
382 ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
383 if (ret == (nb_sectors * 512))
389 * offset and count are in bytes and possibly not aligned. For files opened
390 * with O_DIRECT, necessary alignments are ensured before calling
391 * raw_pwrite_aligned to do the actual write.
393 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
394 const uint8_t *buf, int count)
396 BDRVRawState *s = bs->opaque;
397 int size, ret, shift, sum;
401 if (s->aligned_buf != NULL) {
403 if (offset & 0x1ff) {
404 /* align offset on a 512 bytes boundary */
405 shift = offset & 0x1ff;
406 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
413 memcpy(s->aligned_buf + shift, buf, size);
415 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
427 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
429 while ((size = (count & ~0x1ff)) != 0) {
431 if (size > ALIGNED_BUFFER_SIZE)
432 size = ALIGNED_BUFFER_SIZE;
434 memcpy(s->aligned_buf, buf, size);
436 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
445 /* here, count < 512 because (count & ~0x1ff) == 0 */
447 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
450 memcpy(s->aligned_buf, buf, count);
452 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
463 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
466 static int raw_write(BlockDriverState *bs, int64_t sector_num,
467 const uint8_t *buf, int nb_sectors)
470 ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
471 if (ret == (nb_sectors * 512))
477 /***********************************************************/
478 /* Unix AIO using POSIX AIO */
480 typedef struct RawAIOCB {
481 BlockDriverAIOCB common;
482 struct qemu_paiocb aiocb;
483 struct RawAIOCB *next;
487 typedef struct PosixAioState
493 static void posix_aio_read(void *opaque)
495 PosixAioState *s = opaque;
496 RawAIOCB *acb, **pacb;
500 /* read all bytes from signal pipe */
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 */
513 pacb = &s->first_aio;
518 ret = qemu_paio_error(&acb->aiocb);
519 if (ret == ECANCELED) {
520 /* remove the request */
522 qemu_aio_release(acb);
523 } else if (ret != EINPROGRESS) {
526 ret = qemu_paio_return(&acb->aiocb);
527 if (ret == acb->aiocb.aio_nbytes)
534 /* remove the request */
536 /* call the callback */
537 acb->common.cb(acb->common.opaque, ret);
538 qemu_aio_release(acb);
548 static int posix_aio_flush(void *opaque)
550 PosixAioState *s = opaque;
551 return !!s->first_aio;
554 static PosixAioState *posix_aio_state;
556 static void aio_signal_handler(int signum)
558 if (posix_aio_state) {
561 write(posix_aio_state->wfd, &byte, sizeof(byte));
567 static int posix_aio_init(void)
569 struct sigaction act;
572 struct qemu_paioinit ai;
577 s = qemu_malloc(sizeof(PosixAioState));
579 sigfillset(&act.sa_mask);
580 act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
581 act.sa_handler = aio_signal_handler;
582 sigaction(SIGUSR2, &act, NULL);
585 if (pipe(fds) == -1) {
586 fprintf(stderr, "failed to create pipe\n");
593 fcntl(s->rfd, F_SETFL, O_NONBLOCK);
594 fcntl(s->wfd, F_SETFL, O_NONBLOCK);
596 qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
598 memset(&ai, 0, sizeof(ai));
608 static void raw_aio_remove(RawAIOCB *acb)
612 /* remove the callback from the queue */
613 pacb = &posix_aio_state->first_aio;
616 fprintf(stderr, "raw_aio_remove: aio request not found!\n");
618 } else if (*pacb == acb) {
620 qemu_aio_release(acb);
623 pacb = &(*pacb)->next;
627 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
630 RawAIOCB *acb = (RawAIOCB *)blockacb;
632 ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
633 if (ret == QEMU_PAIO_NOTCANCELED) {
634 /* fail safe: if the aio could not be canceled, we wait for
636 while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
642 static AIOPool raw_aio_pool = {
643 .aiocb_size = sizeof(RawAIOCB),
644 .cancel = raw_aio_cancel,
647 static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
648 QEMUIOVector *qiov, int nb_sectors,
649 BlockDriverCompletionFunc *cb, void *opaque)
651 BDRVRawState *s = bs->opaque;
657 acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque);
660 acb->aiocb.aio_fildes = s->fd;
661 acb->aiocb.ev_signo = SIGUSR2;
662 acb->aiocb.aio_iov = qiov->iov;
663 acb->aiocb.aio_niov = qiov->niov;
664 acb->aiocb.aio_nbytes = nb_sectors * 512;
665 acb->aiocb.aio_offset = sector_num * 512;
666 acb->aiocb.aio_flags = 0;
669 * If O_DIRECT is used the buffer needs to be aligned on a sector
670 * boundary. Tell the low level code to ensure that in case it's
674 acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED;
676 acb->next = posix_aio_state->first_aio;
677 posix_aio_state->first_aio = acb;
681 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
682 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
683 BlockDriverCompletionFunc *cb, void *opaque)
687 acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
690 if (qemu_paio_read(&acb->aiocb) < 0) {
697 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
698 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
699 BlockDriverCompletionFunc *cb, void *opaque)
703 acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
706 if (qemu_paio_write(&acb->aiocb) < 0) {
712 #else /* CONFIG_AIO */
713 static int posix_aio_init(void)
717 #endif /* CONFIG_AIO */
720 static void raw_close(BlockDriverState *bs)
722 BDRVRawState *s = bs->opaque;
726 if (s->aligned_buf != NULL)
727 qemu_free(s->aligned_buf);
731 static int raw_truncate(BlockDriverState *bs, int64_t offset)
733 BDRVRawState *s = bs->opaque;
734 if (s->type != FTYPE_FILE)
736 if (ftruncate(s->fd, offset) < 0)
742 static int64_t raw_getlength(BlockDriverState *bs)
744 BDRVRawState *s = bs->opaque;
750 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
753 if (ioctl(fd, DIOCGDINFO, &dl))
755 return (uint64_t)dl.d_secsize *
756 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
760 #else /* !__OpenBSD__ */
761 static int64_t raw_getlength(BlockDriverState *bs)
763 BDRVRawState *s = bs->opaque;
773 struct dk_minfo minfo;
786 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
787 #ifdef DIOCGMEDIASIZE
788 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
789 #elif defined(DIOCGPART)
792 if (ioctl(fd, DIOCGPART, &pi) == 0)
793 size = pi.media_size;
800 size = LONG_LONG_MAX;
802 size = lseek(fd, 0LL, SEEK_END);
807 /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
808 if (size == 2048LL * (unsigned)-1)
810 /* XXX no disc? maybe we need to reopen... */
811 if (size <= 0 && !reopened && cd_open(bs) >= 0) {
821 * use the DKIOCGMEDIAINFO ioctl to read the size.
823 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
825 size = minfo.dki_lbsize * minfo.dki_capacity;
826 } else /* there are reports that lseek on some devices
827 fails, but irc discussion said that contingency
828 on contingency was overkill */
831 size = lseek(fd, 0, SEEK_END);
837 static int raw_create(const char *filename, QEMUOptionParameter *options)
840 int64_t total_size = 0;
842 /* Read out options */
843 while (options && options->name) {
844 if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
845 total_size = options->value.n / 512;
850 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
854 ftruncate(fd, total_size * 512);
859 static void raw_flush(BlockDriverState *bs)
861 BDRVRawState *s = bs->opaque;
866 static QEMUOptionParameter raw_create_options[] = {
868 .name = BLOCK_OPT_SIZE,
870 .help = "Virtual disk size"
875 static BlockDriver bdrv_raw = {
876 .format_name = "raw",
877 .instance_size = sizeof(BDRVRawState),
878 .bdrv_probe = NULL, /* no probe for protocols */
879 .bdrv_open = raw_open,
880 .bdrv_read = raw_read,
881 .bdrv_write = raw_write,
882 .bdrv_close = raw_close,
883 .bdrv_create = raw_create,
884 .bdrv_flush = raw_flush,
887 .bdrv_aio_readv = raw_aio_readv,
888 .bdrv_aio_writev = raw_aio_writev,
891 .bdrv_truncate = raw_truncate,
892 .bdrv_getlength = raw_getlength,
894 .create_options = raw_create_options,
897 /***********************************************/
901 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
902 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
904 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
906 kern_return_t kernResult;
907 mach_port_t masterPort;
908 CFMutableDictionaryRef classesToMatch;
910 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
911 if ( KERN_SUCCESS != kernResult ) {
912 printf( "IOMasterPort returned %d\n", kernResult );
915 classesToMatch = IOServiceMatching( kIOCDMediaClass );
916 if ( classesToMatch == NULL ) {
917 printf( "IOServiceMatching returned a NULL dictionary.\n" );
919 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
921 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
922 if ( KERN_SUCCESS != kernResult )
924 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
930 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
932 io_object_t nextMedia;
933 kern_return_t kernResult = KERN_FAILURE;
935 nextMedia = IOIteratorNext( mediaIterator );
938 CFTypeRef bsdPathAsCFString;
939 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
940 if ( bsdPathAsCFString ) {
941 size_t devPathLength;
942 strcpy( bsdPath, _PATH_DEV );
943 strcat( bsdPath, "r" );
944 devPathLength = strlen( bsdPath );
945 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
946 kernResult = KERN_SUCCESS;
948 CFRelease( bsdPathAsCFString );
950 IOObjectRelease( nextMedia );
958 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
960 BDRVRawState *s = bs->opaque;
964 if (strstart(filename, "/dev/cdrom", NULL)) {
965 kern_return_t kernResult;
966 io_iterator_t mediaIterator;
967 char bsdPath[ MAXPATHLEN ];
970 kernResult = FindEjectableCDMedia( &mediaIterator );
971 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
973 if ( bsdPath[ 0 ] != '\0' ) {
974 strcat(bsdPath,"s0");
975 /* some CDs don't have a partition 0 */
976 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
978 bsdPath[strlen(bsdPath)-1] = '1';
986 IOObjectRelease( mediaIterator );
990 s->type = FTYPE_FILE;
991 #if defined(__linux__)
992 if (strstart(filename, "/dev/cd", NULL)) {
993 /* open will not fail even if no CD is inserted */
994 s->open_flags |= O_NONBLOCK;
996 } else if (strstart(filename, "/dev/fd", NULL)) {
998 /* open will not fail even if no floppy is inserted */
999 s->open_flags |= O_NONBLOCK;
1001 } else if (strstart(filename, "/dev/sg", NULL)) {
1006 #if defined(__FreeBSD__)
1007 if (strstart(filename, "/dev/cd", NULL) ||
1008 strstart(filename, "/dev/acd", NULL)) {
1013 ret = raw_open_common(bs, filename, flags);
1017 #if defined(__FreeBSD__)
1018 /* make sure the door isnt locked at this time */
1019 if (s->type == FTYPE_CD)
1020 ioctl (s->fd, CDIOCALLOW);
1022 #if defined(__linux__)
1023 /* close fd so that we can reopen it as needed */
1024 if (s->type == FTYPE_FD) {
1027 s->fd_media_changed = 1;
1033 #if defined(__linux__)
1034 /* Note: we do not have a reliable method to detect if the floppy is
1035 present. The current method is to try to open the floppy at every
1036 I/O and to keep it opened during a few hundreds of ms. */
1037 static int fd_open(BlockDriverState *bs)
1039 BDRVRawState *s = bs->opaque;
1040 int last_media_present;
1042 if (s->type != FTYPE_FD)
1044 last_media_present = (s->fd >= 0);
1046 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1050 printf("Floppy closed\n");
1054 if (s->fd_got_error &&
1055 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1057 printf("No floppy (open delayed)\n");
1061 s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
1063 s->fd_error_time = qemu_get_clock(rt_clock);
1064 s->fd_got_error = 1;
1065 if (last_media_present)
1066 s->fd_media_changed = 1;
1068 printf("No floppy\n");
1073 printf("Floppy opened\n");
1076 if (!last_media_present)
1077 s->fd_media_changed = 1;
1078 s->fd_open_time = qemu_get_clock(rt_clock);
1079 s->fd_got_error = 0;
1083 static int raw_is_inserted(BlockDriverState *bs)
1085 BDRVRawState *s = bs->opaque;
1090 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1091 if (ret == CDS_DISC_OK)
1104 /* currently only used by fdc.c, but a CD version would be good too */
1105 static int raw_media_changed(BlockDriverState *bs)
1107 BDRVRawState *s = bs->opaque;
1113 /* XXX: we do not have a true media changed indication. It
1114 does not work if the floppy is changed without trying
1117 ret = s->fd_media_changed;
1118 s->fd_media_changed = 0;
1120 printf("Floppy changed=%d\n", ret);
1129 static int raw_eject(BlockDriverState *bs, int eject_flag)
1131 BDRVRawState *s = bs->opaque;
1136 if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1137 perror("CDROMEJECT");
1139 if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1140 perror("CDROMEJECT");
1150 fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1152 if (ioctl(fd, FDEJECT, 0) < 0)
1164 static int raw_set_locked(BlockDriverState *bs, int locked)
1166 BDRVRawState *s = bs->opaque;
1170 if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1171 /* Note: an error can happen if the distribution automatically
1172 mounts the CD-ROM */
1173 // perror("CDROM_LOCKDOOR");
1182 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1184 BDRVRawState *s = bs->opaque;
1186 return ioctl(s->fd, req, buf);
1190 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1191 unsigned long int req, void *buf,
1192 BlockDriverCompletionFunc *cb, void *opaque)
1194 BDRVRawState *s = bs->opaque;
1197 if (fd_open(bs) < 0)
1200 acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque);
1203 acb->aiocb.aio_fildes = s->fd;
1204 acb->aiocb.ev_signo = SIGUSR2;
1205 acb->aiocb.aio_offset = 0;
1206 acb->aiocb.aio_flags = 0;
1208 acb->next = posix_aio_state->first_aio;
1209 posix_aio_state->first_aio = acb;
1211 acb->aiocb.aio_ioctl_buf = buf;
1212 acb->aiocb.aio_ioctl_cmd = req;
1213 if (qemu_paio_ioctl(&acb->aiocb) < 0) {
1214 raw_aio_remove(acb);
1218 return &acb->common;
1222 #elif defined(__FreeBSD__)
1224 static int fd_open(BlockDriverState *bs)
1226 BDRVRawState *s = bs->opaque;
1228 /* this is just to ensure s->fd is sane (its called by io ops) */
1234 static int cd_open(BlockDriverState *bs)
1236 #if defined(__FreeBSD__)
1237 BDRVRawState *s = bs->opaque;
1242 /* XXX force reread of possibly changed/newly loaded disc,
1243 * FreeBSD seems to not notice sometimes... */
1246 fd = open(bs->filename, s->open_flags, 0644);
1252 /* make sure the door isnt locked at this time */
1253 ioctl (s->fd, CDIOCALLOW);
1259 static int raw_is_inserted(BlockDriverState *bs)
1261 BDRVRawState *s = bs->opaque;
1265 return (raw_getlength(bs) > 0);
1267 /* XXX handle this */
1274 static int raw_media_changed(BlockDriverState *bs)
1279 static int raw_eject(BlockDriverState *bs, int eject_flag)
1281 BDRVRawState *s = bs->opaque;
1287 (void) ioctl (s->fd, CDIOCALLOW);
1289 if (ioctl (s->fd, CDIOCEJECT) < 0)
1290 perror("CDIOCEJECT");
1292 if (ioctl (s->fd, CDIOCCLOSE) < 0)
1293 perror("CDIOCCLOSE");
1295 if (cd_open(bs) < 0)
1299 /* XXX handle this */
1307 static int raw_set_locked(BlockDriverState *bs, int locked)
1309 BDRVRawState *s = bs->opaque;
1315 if (ioctl (s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1316 /* Note: an error can happen if the distribution automatically
1317 mounts the CD-ROM */
1318 // perror("CDROM_LOCKDOOR");
1327 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1331 #else /* !linux && !FreeBSD */
1333 static int fd_open(BlockDriverState *bs)
1338 static int raw_is_inserted(BlockDriverState *bs)
1343 static int raw_media_changed(BlockDriverState *bs)
1348 static int raw_eject(BlockDriverState *bs, int eject_flag)
1353 static int raw_set_locked(BlockDriverState *bs, int locked)
1358 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1363 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1364 unsigned long int req, void *buf,
1365 BlockDriverCompletionFunc *cb, void *opaque)
1369 #endif /* !linux && !FreeBSD */
1371 static int hdev_create(const char *filename, QEMUOptionParameter *options)
1375 struct stat stat_buf;
1376 int64_t total_size = 0;
1378 /* Read out options */
1379 while (options && options->name) {
1380 if (!strcmp(options->name, "size")) {
1381 total_size = options->value.n / 512;
1386 fd = open(filename, O_WRONLY | O_BINARY);
1390 if (fstat(fd, &stat_buf) < 0)
1392 else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
1394 else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1401 static BlockDriver bdrv_host_device = {
1402 .format_name = "host_device",
1403 .instance_size = sizeof(BDRVRawState),
1404 .bdrv_open = hdev_open,
1405 .bdrv_close = raw_close,
1406 .bdrv_create = hdev_create,
1407 .bdrv_flush = raw_flush,
1410 .bdrv_aio_readv = raw_aio_readv,
1411 .bdrv_aio_writev = raw_aio_writev,
1414 .bdrv_read = raw_read,
1415 .bdrv_write = raw_write,
1416 .bdrv_getlength = raw_getlength,
1418 /* removable device support */
1419 .bdrv_is_inserted = raw_is_inserted,
1420 .bdrv_media_changed = raw_media_changed,
1421 .bdrv_eject = raw_eject,
1422 .bdrv_set_locked = raw_set_locked,
1423 /* generic scsi device */
1424 .bdrv_ioctl = raw_ioctl,
1426 .bdrv_aio_ioctl = raw_aio_ioctl,
1430 static void bdrv_raw_init(void)
1432 bdrv_register(&bdrv_raw);
1433 bdrv_register(&bdrv_host_device);
1436 block_init(bdrv_raw_init);