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>
61 #include <sys/ioctl.h>
62 #include <sys/disklabel.h>
67 #include <sys/ioctl.h>
68 #include <sys/diskslice.h>
71 //#define DEBUG_FLOPPY
74 #if defined(DEBUG_BLOCK)
75 #define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (qemu_log_enabled()) \
76 { qemu_log(formatCstr, ##args); qemu_log_flush(); } } while (0)
78 #define DEBUG_BLOCK_PRINT(formatCstr, args...)
81 /* OS X does not have O_DSYNC */
83 #define O_DSYNC O_SYNC
86 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
88 #define O_DIRECT O_DSYNC
95 #define ALIGNED_BUFFER_SIZE (32 * 512)
97 /* if the FD is not accessed during that time (in ms), we try to
98 reopen it to see if the disk has been changed */
99 #define FD_OPEN_TIMEOUT 1000
101 typedef struct BDRVRawState {
104 unsigned int lseek_err_cnt;
105 #if defined(__linux__)
106 /* linux floppy specific */
108 int64_t fd_open_time;
109 int64_t fd_error_time;
111 int fd_media_changed;
113 uint8_t* aligned_buf;
116 static int posix_aio_init(void);
118 static int fd_open(BlockDriverState *bs);
120 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
122 BDRVRawState *s = bs->opaque;
123 int fd, open_flags, ret;
127 s->lseek_err_cnt = 0;
129 open_flags = O_BINARY;
130 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
131 open_flags |= O_RDWR;
133 open_flags |= O_RDONLY;
136 if (flags & BDRV_O_CREAT)
137 open_flags |= O_CREAT | O_TRUNC;
139 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
140 * and O_DIRECT for no caching. */
141 if ((flags & BDRV_O_NOCACHE))
142 open_flags |= O_DIRECT;
143 else if (!(flags & BDRV_O_CACHE_WB))
144 open_flags |= O_DSYNC;
146 s->type = FTYPE_FILE;
148 fd = open(filename, open_flags, 0644);
156 s->aligned_buf = NULL;
157 if ((flags & BDRV_O_NOCACHE)) {
158 s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
159 if (s->aligned_buf == NULL) {
168 /* XXX: use host sector size if necessary with:
169 #ifdef DIOCGSECTORSIZE
171 unsigned int sectorsize = 512;
172 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
173 sectorsize > bufsize)
174 bufsize = sectorsize;
178 u_int32_t blockSize = 512;
179 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
186 * offset and count are in bytes, but must be multiples of 512 for files
187 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
189 * This function may be called without alignment if the caller ensures
190 * that O_DIRECT is not in effect.
192 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
193 uint8_t *buf, int count)
195 BDRVRawState *s = bs->opaque;
202 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
203 ++(s->lseek_err_cnt);
204 if(s->lseek_err_cnt <= 10) {
205 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
206 "] lseek failed : %d = %s\n",
207 s->fd, bs->filename, offset, buf, count,
208 bs->total_sectors, errno, strerror(errno));
214 ret = read(s->fd, buf, count);
216 goto label__raw_read__success;
218 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
219 "] read failed %d : %d = %s\n",
220 s->fd, bs->filename, offset, buf, count,
221 bs->total_sectors, ret, errno, strerror(errno));
223 /* Try harder for CDrom. */
224 if (bs->type == BDRV_TYPE_CDROM) {
225 lseek(s->fd, offset, SEEK_SET);
226 ret = read(s->fd, buf, count);
228 goto label__raw_read__success;
229 lseek(s->fd, offset, SEEK_SET);
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 "] retry read failed %d : %d = %s\n",
236 s->fd, bs->filename, offset, buf, count,
237 bs->total_sectors, ret, errno, strerror(errno));
240 label__raw_read__success:
246 * offset and count are in bytes, but must be multiples of 512 for files
247 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
249 * This function may be called without alignment if the caller ensures
250 * that O_DIRECT is not in effect.
252 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
253 const uint8_t *buf, int count)
255 BDRVRawState *s = bs->opaque;
262 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
263 ++(s->lseek_err_cnt);
264 if(s->lseek_err_cnt) {
265 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
266 PRId64 "] lseek failed : %d = %s\n",
267 s->fd, bs->filename, offset, buf, count,
268 bs->total_sectors, errno, strerror(errno));
272 s->lseek_err_cnt = 0;
274 ret = write(s->fd, buf, count);
276 goto label__raw_write__success;
278 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
279 "] write failed %d : %d = %s\n",
280 s->fd, bs->filename, offset, buf, count,
281 bs->total_sectors, ret, errno, strerror(errno));
283 label__raw_write__success:
285 return (ret < 0) ? -errno : ret;
290 * offset and count are in bytes and possibly not aligned. For files opened
291 * with O_DIRECT, necessary alignments are ensured before calling
292 * raw_pread_aligned to do the actual read.
294 static int raw_pread(BlockDriverState *bs, int64_t offset,
295 uint8_t *buf, int count)
297 BDRVRawState *s = bs->opaque;
298 int size, ret, shift, sum;
302 if (s->aligned_buf != NULL) {
304 if (offset & 0x1ff) {
305 /* align offset on a 512 bytes boundary */
307 shift = offset & 0x1ff;
308 size = (shift + count + 0x1ff) & ~0x1ff;
309 if (size > ALIGNED_BUFFER_SIZE)
310 size = ALIGNED_BUFFER_SIZE;
311 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
318 memcpy(buf, s->aligned_buf + shift, size);
328 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
330 /* read on aligned buffer */
334 size = (count + 0x1ff) & ~0x1ff;
335 if (size > ALIGNED_BUFFER_SIZE)
336 size = ALIGNED_BUFFER_SIZE;
338 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
346 memcpy(buf, s->aligned_buf, size);
358 return raw_pread_aligned(bs, offset, buf, count) + sum;
361 static int raw_read(BlockDriverState *bs, int64_t sector_num,
362 uint8_t *buf, int nb_sectors)
364 return raw_pread(bs, sector_num * 512, buf, (uint64_t)nb_sectors * 512);
368 * offset and count are in bytes and possibly not aligned. For files opened
369 * with O_DIRECT, necessary alignments are ensured before calling
370 * raw_pwrite_aligned to do the actual write.
372 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
373 const uint8_t *buf, int count)
375 BDRVRawState *s = bs->opaque;
376 int size, ret, shift, sum;
380 if (s->aligned_buf != NULL) {
382 if (offset & 0x1ff) {
383 /* align offset on a 512 bytes boundary */
384 shift = offset & 0x1ff;
385 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
392 memcpy(s->aligned_buf + shift, buf, size);
394 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
406 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
408 while ((size = (count & ~0x1ff)) != 0) {
410 if (size > ALIGNED_BUFFER_SIZE)
411 size = ALIGNED_BUFFER_SIZE;
413 memcpy(s->aligned_buf, buf, size);
415 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
424 /* here, count < 512 because (count & ~0x1ff) == 0 */
426 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
429 memcpy(s->aligned_buf, buf, count);
431 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
442 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
445 static int raw_write(BlockDriverState *bs, int64_t sector_num,
446 const uint8_t *buf, int nb_sectors)
448 return raw_pwrite(bs, sector_num * 512, buf, (uint64_t)nb_sectors * 512);
452 /***********************************************************/
453 /* Unix AIO using POSIX AIO */
455 typedef struct RawAIOCB {
456 BlockDriverAIOCB common;
457 struct qemu_paiocb aiocb;
458 struct RawAIOCB *next;
462 typedef struct PosixAioState
468 static void posix_aio_read(void *opaque)
470 PosixAioState *s = opaque;
471 RawAIOCB *acb, **pacb;
475 /* read all bytes from signal pipe */
479 len = read(s->rfd, bytes, sizeof(bytes));
480 if (len == -1 && errno == EINTR)
481 continue; /* try again */
482 if (len == sizeof(bytes))
483 continue; /* more to read */
488 pacb = &s->first_aio;
493 ret = qemu_paio_error(&acb->aiocb);
494 if (ret == ECANCELED) {
495 /* remove the request */
497 qemu_aio_release(acb);
498 } else if (ret != EINPROGRESS) {
501 ret = qemu_paio_return(&acb->aiocb);
502 if (ret == acb->aiocb.aio_nbytes)
509 /* remove the request */
511 /* call the callback */
512 acb->common.cb(acb->common.opaque, ret);
513 qemu_aio_release(acb);
523 static int posix_aio_flush(void *opaque)
525 PosixAioState *s = opaque;
526 return !!s->first_aio;
529 static PosixAioState *posix_aio_state;
531 static void aio_signal_handler(int signum)
533 if (posix_aio_state) {
536 write(posix_aio_state->wfd, &byte, sizeof(byte));
542 static int posix_aio_init(void)
544 struct sigaction act;
547 struct qemu_paioinit ai;
552 s = qemu_malloc(sizeof(PosixAioState));
554 sigfillset(&act.sa_mask);
555 act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
556 act.sa_handler = aio_signal_handler;
557 sigaction(SIGUSR2, &act, NULL);
560 if (pipe(fds) == -1) {
561 fprintf(stderr, "failed to create pipe\n");
568 fcntl(s->rfd, F_SETFL, O_NONBLOCK);
569 fcntl(s->wfd, F_SETFL, O_NONBLOCK);
571 qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
573 memset(&ai, 0, sizeof(ai));
583 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
584 int64_t sector_num, uint8_t *buf, int nb_sectors,
585 BlockDriverCompletionFunc *cb, void *opaque)
587 BDRVRawState *s = bs->opaque;
593 acb = qemu_aio_get(bs, cb, opaque);
596 acb->aiocb.aio_fildes = s->fd;
597 acb->aiocb.ev_signo = SIGUSR2;
598 acb->aiocb.aio_buf = buf;
600 acb->aiocb.aio_nbytes = -nb_sectors;
602 acb->aiocb.aio_nbytes = nb_sectors * 512;
603 acb->aiocb.aio_offset = sector_num * 512;
604 acb->next = posix_aio_state->first_aio;
605 posix_aio_state->first_aio = acb;
609 static void raw_aio_em_cb(void* opaque)
611 RawAIOCB *acb = opaque;
612 acb->common.cb(acb->common.opaque, acb->ret);
613 qemu_aio_release(acb);
616 static void raw_aio_remove(RawAIOCB *acb)
620 /* remove the callback from the queue */
621 pacb = &posix_aio_state->first_aio;
624 fprintf(stderr, "raw_aio_remove: aio request not found!\n");
626 } else if (*pacb == acb) {
628 qemu_aio_release(acb);
631 pacb = &(*pacb)->next;
635 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
636 int64_t sector_num, uint8_t *buf, int nb_sectors,
637 BlockDriverCompletionFunc *cb, void *opaque)
642 * If O_DIRECT is used and the buffer is not aligned fall back
645 BDRVRawState *s = bs->opaque;
647 if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
649 acb = qemu_aio_get(bs, cb, opaque);
650 acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors);
651 bh = qemu_bh_new(raw_aio_em_cb, acb);
652 qemu_bh_schedule(bh);
656 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
659 if (qemu_paio_read(&acb->aiocb) < 0) {
666 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
667 int64_t sector_num, const uint8_t *buf, int nb_sectors,
668 BlockDriverCompletionFunc *cb, void *opaque)
673 * If O_DIRECT is used and the buffer is not aligned fall back
676 BDRVRawState *s = bs->opaque;
678 if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
680 acb = qemu_aio_get(bs, cb, opaque);
681 acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors);
682 bh = qemu_bh_new(raw_aio_em_cb, acb);
683 qemu_bh_schedule(bh);
687 acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
690 if (qemu_paio_write(&acb->aiocb) < 0) {
697 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
700 RawAIOCB *acb = (RawAIOCB *)blockacb;
702 ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
703 if (ret == QEMU_PAIO_NOTCANCELED) {
704 /* fail safe: if the aio could not be canceled, we wait for
706 while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
711 #else /* CONFIG_AIO */
712 static int posix_aio_init(void)
716 #endif /* CONFIG_AIO */
719 static void raw_close(BlockDriverState *bs)
721 BDRVRawState *s = bs->opaque;
725 if (s->aligned_buf != NULL)
726 qemu_free(s->aligned_buf);
730 static int raw_truncate(BlockDriverState *bs, int64_t offset)
732 BDRVRawState *s = bs->opaque;
733 if (s->type != FTYPE_FILE)
735 if (ftruncate(s->fd, offset) < 0)
741 static int64_t raw_getlength(BlockDriverState *bs)
743 BDRVRawState *s = bs->opaque;
749 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
752 if (ioctl(fd, DIOCGDINFO, &dl))
754 return (uint64_t)dl.d_secsize *
755 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
759 #else /* !__OpenBSD__ */
760 static int64_t raw_getlength(BlockDriverState *bs)
762 BDRVRawState *s = bs->opaque;
769 struct dk_minfo minfo;
779 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
780 #ifdef DIOCGMEDIASIZE
781 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
782 #elif defined(DIOCGPART)
785 if (ioctl(fd, DIOCGPART, &pi) == 0)
786 size = pi.media_size;
793 size = LONG_LONG_MAX;
795 size = lseek(fd, 0LL, SEEK_END);
801 * use the DKIOCGMEDIAINFO ioctl to read the size.
803 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
805 size = minfo.dki_lbsize * minfo.dki_capacity;
806 } else /* there are reports that lseek on some devices
807 fails, but irc discussion said that contingency
808 on contingency was overkill */
811 size = lseek(fd, 0, SEEK_END);
817 static int raw_create(const char *filename, int64_t total_size,
818 const char *backing_file, int flags)
822 if (flags || backing_file)
825 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
829 ftruncate(fd, total_size * 512);
834 static void raw_flush(BlockDriverState *bs)
836 BDRVRawState *s = bs->opaque;
840 BlockDriver bdrv_raw = {
842 sizeof(BDRVRawState),
843 NULL, /* no probe for protocols */
852 .bdrv_aio_read = raw_aio_read,
853 .bdrv_aio_write = raw_aio_write,
854 .bdrv_aio_cancel = raw_aio_cancel,
855 .aiocb_size = sizeof(RawAIOCB),
858 .bdrv_read = raw_read,
859 .bdrv_write = raw_write,
860 .bdrv_truncate = raw_truncate,
861 .bdrv_getlength = raw_getlength,
864 /***********************************************/
868 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
869 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
871 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
873 kern_return_t kernResult;
874 mach_port_t masterPort;
875 CFMutableDictionaryRef classesToMatch;
877 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
878 if ( KERN_SUCCESS != kernResult ) {
879 printf( "IOMasterPort returned %d\n", kernResult );
882 classesToMatch = IOServiceMatching( kIOCDMediaClass );
883 if ( classesToMatch == NULL ) {
884 printf( "IOServiceMatching returned a NULL dictionary.\n" );
886 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
888 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
889 if ( KERN_SUCCESS != kernResult )
891 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
897 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
899 io_object_t nextMedia;
900 kern_return_t kernResult = KERN_FAILURE;
902 nextMedia = IOIteratorNext( mediaIterator );
905 CFTypeRef bsdPathAsCFString;
906 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
907 if ( bsdPathAsCFString ) {
908 size_t devPathLength;
909 strcpy( bsdPath, _PATH_DEV );
910 strcat( bsdPath, "r" );
911 devPathLength = strlen( bsdPath );
912 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
913 kernResult = KERN_SUCCESS;
915 CFRelease( bsdPathAsCFString );
917 IOObjectRelease( nextMedia );
925 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
927 BDRVRawState *s = bs->opaque;
928 int fd, open_flags, ret;
933 if (strstart(filename, "/dev/cdrom", NULL)) {
934 kern_return_t kernResult;
935 io_iterator_t mediaIterator;
936 char bsdPath[ MAXPATHLEN ];
939 kernResult = FindEjectableCDMedia( &mediaIterator );
940 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
942 if ( bsdPath[ 0 ] != '\0' ) {
943 strcat(bsdPath,"s0");
944 /* some CDs don't have a partition 0 */
945 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
947 bsdPath[strlen(bsdPath)-1] = '1';
955 IOObjectRelease( mediaIterator );
958 open_flags = O_BINARY;
959 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
960 open_flags |= O_RDWR;
962 open_flags |= O_RDONLY;
965 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
966 * and O_DIRECT for no caching. */
967 if ((flags & BDRV_O_NOCACHE))
968 open_flags |= O_DIRECT;
969 else if (!(flags & BDRV_O_CACHE_WB))
970 open_flags |= O_DSYNC;
972 s->type = FTYPE_FILE;
973 #if defined(__linux__)
974 if (strstart(filename, "/dev/cd", NULL)) {
975 /* open will not fail even if no CD is inserted */
976 open_flags |= O_NONBLOCK;
978 } else if (strstart(filename, "/dev/fd", NULL)) {
980 s->fd_open_flags = open_flags;
981 /* open will not fail even if no floppy is inserted */
982 open_flags |= O_NONBLOCK;
983 } else if (strstart(filename, "/dev/sg", NULL)) {
987 fd = open(filename, open_flags, 0644);
995 #if defined(__linux__)
996 /* close fd so that we can reopen it as needed */
997 if (s->type == FTYPE_FD) {
1000 s->fd_media_changed = 1;
1006 #if defined(__linux__)
1007 /* Note: we do not have a reliable method to detect if the floppy is
1008 present. The current method is to try to open the floppy at every
1009 I/O and to keep it opened during a few hundreds of ms. */
1010 static int fd_open(BlockDriverState *bs)
1012 BDRVRawState *s = bs->opaque;
1013 int last_media_present;
1015 if (s->type != FTYPE_FD)
1017 last_media_present = (s->fd >= 0);
1019 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1023 printf("Floppy closed\n");
1027 if (s->fd_got_error &&
1028 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1030 printf("No floppy (open delayed)\n");
1034 s->fd = open(bs->filename, s->fd_open_flags);
1036 s->fd_error_time = qemu_get_clock(rt_clock);
1037 s->fd_got_error = 1;
1038 if (last_media_present)
1039 s->fd_media_changed = 1;
1041 printf("No floppy\n");
1046 printf("Floppy opened\n");
1049 if (!last_media_present)
1050 s->fd_media_changed = 1;
1051 s->fd_open_time = qemu_get_clock(rt_clock);
1052 s->fd_got_error = 0;
1056 static int raw_is_inserted(BlockDriverState *bs)
1058 BDRVRawState *s = bs->opaque;
1063 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1064 if (ret == CDS_DISC_OK)
1077 /* currently only used by fdc.c, but a CD version would be good too */
1078 static int raw_media_changed(BlockDriverState *bs)
1080 BDRVRawState *s = bs->opaque;
1086 /* XXX: we do not have a true media changed indication. It
1087 does not work if the floppy is changed without trying
1090 ret = s->fd_media_changed;
1091 s->fd_media_changed = 0;
1093 printf("Floppy changed=%d\n", ret);
1102 static int raw_eject(BlockDriverState *bs, int eject_flag)
1104 BDRVRawState *s = bs->opaque;
1109 if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1110 perror("CDROMEJECT");
1112 if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1113 perror("CDROMEJECT");
1123 fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1125 if (ioctl(fd, FDEJECT, 0) < 0)
1137 static int raw_set_locked(BlockDriverState *bs, int locked)
1139 BDRVRawState *s = bs->opaque;
1143 if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1144 /* Note: an error can happen if the distribution automatically
1145 mounts the CD-ROM */
1146 // perror("CDROM_LOCKDOOR");
1155 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1157 BDRVRawState *s = bs->opaque;
1159 return ioctl(s->fd, req, buf);
1163 static int fd_open(BlockDriverState *bs)
1168 static int raw_is_inserted(BlockDriverState *bs)
1173 static int raw_media_changed(BlockDriverState *bs)
1178 static int raw_eject(BlockDriverState *bs, int eject_flag)
1183 static int raw_set_locked(BlockDriverState *bs, int locked)
1188 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1194 static int raw_sg_send_command(BlockDriverState *bs, void *buf, int count)
1196 return raw_pwrite(bs, -1, buf, count);
1199 static int raw_sg_recv_response(BlockDriverState *bs, void *buf, int count)
1201 return raw_pread(bs, -1, buf, count);
1204 static BlockDriverAIOCB *raw_sg_aio_read(BlockDriverState *bs,
1205 void *buf, int count,
1206 BlockDriverCompletionFunc *cb,
1209 return raw_aio_read(bs, 0, buf, -(int64_t)count, cb, opaque);
1212 static BlockDriverAIOCB *raw_sg_aio_write(BlockDriverState *bs,
1213 void *buf, int count,
1214 BlockDriverCompletionFunc *cb,
1217 return raw_aio_write(bs, 0, buf, -(int64_t)count, cb, opaque);
1220 BlockDriver bdrv_host_device = {
1221 .format_name = "host_device",
1222 .instance_size = sizeof(BDRVRawState),
1223 .bdrv_open = hdev_open,
1224 .bdrv_close = raw_close,
1225 .bdrv_flush = raw_flush,
1228 .bdrv_aio_read = raw_aio_read,
1229 .bdrv_aio_write = raw_aio_write,
1230 .bdrv_aio_cancel = raw_aio_cancel,
1231 .aiocb_size = sizeof(RawAIOCB),
1234 .bdrv_read = raw_read,
1235 .bdrv_write = raw_write,
1236 .bdrv_getlength = raw_getlength,
1238 /* removable device support */
1239 .bdrv_is_inserted = raw_is_inserted,
1240 .bdrv_media_changed = raw_media_changed,
1241 .bdrv_eject = raw_eject,
1242 .bdrv_set_locked = raw_set_locked,
1243 /* generic scsi device */
1244 .bdrv_ioctl = raw_ioctl,
1245 .bdrv_sg_send_command = raw_sg_send_command,
1246 .bdrv_sg_recv_response = raw_sg_recv_response,
1247 .bdrv_sg_aio_read = raw_sg_aio_read,
1248 .bdrv_sg_aio_write = raw_sg_aio_write,