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"
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>
66 //#define DEBUG_FLOPPY
69 #if defined(DEBUG_BLOCK)
70 #define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \
71 { fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0)
73 #define DEBUG_BLOCK_PRINT(formatCstr, args...)
80 #define ALIGNED_BUFFER_SIZE (32 * 512)
82 /* if the FD is not accessed during that time (in ms), we try to
83 reopen it to see if the disk has been changed */
84 #define FD_OPEN_TIMEOUT 1000
86 /* posix-aio doesn't allow multiple outstanding requests to a single file
87 * descriptor. we implement a pool of dup()'d file descriptors to work
89 #define RAW_FD_POOL_SIZE 64
91 typedef struct BDRVRawState {
94 unsigned int lseek_err_cnt;
95 int fd_pool[RAW_FD_POOL_SIZE];
96 #if defined(__linux__)
97 /* linux floppy specific */
100 int64_t fd_error_time;
102 int fd_media_changed;
104 #if defined(O_DIRECT)
105 uint8_t* aligned_buf;
109 static int posix_aio_init(void);
111 static int fd_open(BlockDriverState *bs);
113 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
115 BDRVRawState *s = bs->opaque;
116 int fd, open_flags, ret;
121 s->lseek_err_cnt = 0;
123 open_flags = O_BINARY;
124 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
125 open_flags |= O_RDWR;
127 open_flags |= O_RDONLY;
130 if (flags & BDRV_O_CREAT)
131 open_flags |= O_CREAT | O_TRUNC;
133 if (flags & BDRV_O_DIRECT)
134 open_flags |= O_DIRECT;
137 s->type = FTYPE_FILE;
139 fd = open(filename, open_flags, 0644);
147 for (i = 0; i < RAW_FD_POOL_SIZE; i++)
149 #if defined(O_DIRECT)
150 s->aligned_buf = NULL;
151 if (flags & BDRV_O_DIRECT) {
152 s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
153 if (s->aligned_buf == NULL) {
163 /* XXX: use host sector size if necessary with:
164 #ifdef DIOCGSECTORSIZE
166 unsigned int sectorsize = 512;
167 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
168 sectorsize > bufsize)
169 bufsize = sectorsize;
173 u_int32_t blockSize = 512;
174 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
181 * offset and count are in bytes, but must be multiples of 512 for files
182 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
184 * This function may be called without alignment if the caller ensures
185 * that O_DIRECT is not in effect.
187 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
188 uint8_t *buf, int count)
190 BDRVRawState *s = bs->opaque;
197 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
198 ++(s->lseek_err_cnt);
199 if(s->lseek_err_cnt <= 10) {
200 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
201 "] lseek failed : %d = %s\n",
202 s->fd, bs->filename, offset, buf, count,
203 bs->total_sectors, errno, strerror(errno));
209 ret = read(s->fd, buf, count);
211 goto label__raw_read__success;
213 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
214 "] read failed %d : %d = %s\n",
215 s->fd, bs->filename, offset, buf, count,
216 bs->total_sectors, ret, errno, strerror(errno));
218 /* Try harder for CDrom. */
219 if (bs->type == BDRV_TYPE_CDROM) {
220 lseek(s->fd, offset, SEEK_SET);
221 ret = read(s->fd, buf, count);
223 goto label__raw_read__success;
224 lseek(s->fd, offset, SEEK_SET);
225 ret = read(s->fd, buf, count);
227 goto label__raw_read__success;
229 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
230 "] retry read failed %d : %d = %s\n",
231 s->fd, bs->filename, offset, buf, count,
232 bs->total_sectors, ret, errno, strerror(errno));
235 label__raw_read__success:
241 * offset and count are in bytes, but must be multiples of 512 for files
242 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
244 * This function may be called without alignment if the caller ensures
245 * that O_DIRECT is not in effect.
247 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
248 const uint8_t *buf, int count)
250 BDRVRawState *s = bs->opaque;
257 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
258 ++(s->lseek_err_cnt);
259 if(s->lseek_err_cnt) {
260 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
261 PRId64 "] lseek failed : %d = %s\n",
262 s->fd, bs->filename, offset, buf, count,
263 bs->total_sectors, errno, strerror(errno));
267 s->lseek_err_cnt = 0;
269 ret = write(s->fd, buf, count);
271 goto label__raw_write__success;
273 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
274 "] write failed %d : %d = %s\n",
275 s->fd, bs->filename, offset, buf, count,
276 bs->total_sectors, ret, errno, strerror(errno));
278 label__raw_write__success:
284 #if defined(O_DIRECT)
286 * offset and count are in bytes and possibly not aligned. For files opened
287 * with O_DIRECT, necessary alignments are ensured before calling
288 * raw_pread_aligned to do the actual read.
290 static int raw_pread(BlockDriverState *bs, int64_t offset,
291 uint8_t *buf, int count)
293 BDRVRawState *s = bs->opaque;
294 int size, ret, shift, sum;
298 if (s->aligned_buf != NULL) {
300 if (offset & 0x1ff) {
301 /* align offset on a 512 bytes boundary */
303 shift = offset & 0x1ff;
304 size = (shift + count + 0x1ff) & ~0x1ff;
305 if (size > ALIGNED_BUFFER_SIZE)
306 size = ALIGNED_BUFFER_SIZE;
307 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
314 memcpy(buf, s->aligned_buf + shift, size);
324 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
326 /* read on aligned buffer */
330 size = (count + 0x1ff) & ~0x1ff;
331 if (size > ALIGNED_BUFFER_SIZE)
332 size = ALIGNED_BUFFER_SIZE;
334 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
342 memcpy(buf, s->aligned_buf, size);
354 return raw_pread_aligned(bs, offset, buf, count) + sum;
358 * offset and count are in bytes and possibly not aligned. For files opened
359 * with O_DIRECT, necessary alignments are ensured before calling
360 * raw_pwrite_aligned to do the actual write.
362 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
363 const uint8_t *buf, int count)
365 BDRVRawState *s = bs->opaque;
366 int size, ret, shift, sum;
370 if (s->aligned_buf != NULL) {
372 if (offset & 0x1ff) {
373 /* align offset on a 512 bytes boundary */
374 shift = offset & 0x1ff;
375 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
382 memcpy(s->aligned_buf + shift, buf, size);
384 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
396 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
398 while ((size = (count & ~0x1ff)) != 0) {
400 if (size > ALIGNED_BUFFER_SIZE)
401 size = ALIGNED_BUFFER_SIZE;
403 memcpy(s->aligned_buf, buf, size);
405 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
414 /* here, count < 512 because (count & ~0x1ff) == 0 */
416 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
419 memcpy(s->aligned_buf, buf, count);
421 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
432 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
436 #define raw_pread raw_pread_aligned
437 #define raw_pwrite raw_pwrite_aligned
442 /***********************************************************/
443 /* Unix AIO using POSIX AIO */
445 typedef struct RawAIOCB {
446 BlockDriverAIOCB common;
449 struct RawAIOCB *next;
453 typedef struct PosixAioState
459 static int raw_fd_pool_get(BDRVRawState *s)
463 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
465 if (s->fd_pool[i] != -1)
468 /* try to dup file descriptor */
469 s->fd_pool[i] = dup(s->fd);
470 if (s->fd_pool[i] != -1)
471 return s->fd_pool[i];
474 /* we couldn't dup the file descriptor so just use the main one */
478 static void raw_fd_pool_put(RawAIOCB *acb)
480 BDRVRawState *s = acb->common.bs->opaque;
483 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
484 if (s->fd_pool[i] == acb->fd) {
485 close(s->fd_pool[i]);
491 static void posix_aio_read(void *opaque)
493 PosixAioState *s = opaque;
494 RawAIOCB *acb, **pacb;
501 len = read(s->rfd, &byte, 1);
502 if (len == -1 && errno == EINTR)
504 if (len == -1 && errno == EAGAIN)
509 pacb = &s->first_aio;
514 ret = aio_error(&acb->aiocb);
515 if (ret == ECANCELED) {
516 /* remove the request */
518 raw_fd_pool_put(acb);
519 qemu_aio_release(acb);
520 } else if (ret != EINPROGRESS) {
523 ret = aio_return(&acb->aiocb);
524 if (ret == acb->aiocb.aio_nbytes)
531 /* remove the request */
533 /* call the callback */
534 acb->common.cb(acb->common.opaque, ret);
535 raw_fd_pool_put(acb);
536 qemu_aio_release(acb);
546 static int posix_aio_flush(void *opaque)
548 PosixAioState *s = opaque;
549 return !!s->first_aio;
552 static PosixAioState *posix_aio_state;
554 static void aio_signal_handler(int signum)
556 if (posix_aio_state) {
559 write(posix_aio_state->wfd, &byte, sizeof(byte));
565 static int posix_aio_init(void)
567 struct sigaction act;
574 s = qemu_malloc(sizeof(PosixAioState));
578 sigfillset(&act.sa_mask);
579 act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
580 act.sa_handler = aio_signal_handler;
581 sigaction(SIGUSR2, &act, NULL);
584 if (pipe(fds) == -1) {
585 fprintf(stderr, "failed to create pipe\n");
592 fcntl(s->wfd, F_SETFL, O_NONBLOCK);
594 qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
596 #if defined(__linux__)
600 memset(&ai, 0, sizeof(ai));
601 #if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 4)
605 /* XXX: aio thread exit seems to hang on RedHat 9 and this init
606 seems to fix the problem. */
609 ai.aio_idle_time = 365 * 100000;
619 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
620 int64_t sector_num, uint8_t *buf, int nb_sectors,
621 BlockDriverCompletionFunc *cb, void *opaque)
623 BDRVRawState *s = bs->opaque;
629 acb = qemu_aio_get(bs, cb, opaque);
632 acb->fd = raw_fd_pool_get(s);
633 acb->aiocb.aio_fildes = acb->fd;
634 acb->aiocb.aio_sigevent.sigev_signo = SIGUSR2;
635 acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
636 acb->aiocb.aio_buf = buf;
638 acb->aiocb.aio_nbytes = -nb_sectors;
640 acb->aiocb.aio_nbytes = nb_sectors * 512;
641 acb->aiocb.aio_offset = sector_num * 512;
642 acb->next = posix_aio_state->first_aio;
643 posix_aio_state->first_aio = acb;
647 static void raw_aio_em_cb(void* opaque)
649 RawAIOCB *acb = opaque;
650 acb->common.cb(acb->common.opaque, acb->ret);
651 qemu_aio_release(acb);
654 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
655 int64_t sector_num, uint8_t *buf, int nb_sectors,
656 BlockDriverCompletionFunc *cb, void *opaque)
661 * If O_DIRECT is used and the buffer is not aligned fall back
664 #if defined(O_DIRECT)
665 BDRVRawState *s = bs->opaque;
667 if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
669 acb = qemu_aio_get(bs, cb, opaque);
670 acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors);
671 bh = qemu_bh_new(raw_aio_em_cb, acb);
672 qemu_bh_schedule(bh);
677 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
680 if (aio_read(&acb->aiocb) < 0) {
681 qemu_aio_release(acb);
687 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
688 int64_t sector_num, const uint8_t *buf, int nb_sectors,
689 BlockDriverCompletionFunc *cb, void *opaque)
694 * If O_DIRECT is used and the buffer is not aligned fall back
697 #if defined(O_DIRECT)
698 BDRVRawState *s = bs->opaque;
700 if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
702 acb = qemu_aio_get(bs, cb, opaque);
703 acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors);
704 bh = qemu_bh_new(raw_aio_em_cb, acb);
705 qemu_bh_schedule(bh);
710 acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
713 if (aio_write(&acb->aiocb) < 0) {
714 qemu_aio_release(acb);
720 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
723 RawAIOCB *acb = (RawAIOCB *)blockacb;
726 ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
727 if (ret == AIO_NOTCANCELED) {
728 /* fail safe: if the aio could not be canceled, we wait for
730 while (aio_error(&acb->aiocb) == EINPROGRESS);
733 /* remove the callback from the queue */
734 pacb = &posix_aio_state->first_aio;
738 } else if (*pacb == acb) {
740 raw_fd_pool_put(acb);
741 qemu_aio_release(acb);
748 #else /* CONFIG_AIO */
749 static int posix_aio_init(void)
753 #endif /* CONFIG_AIO */
755 static void raw_close_fd_pool(BDRVRawState *s)
759 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
760 if (s->fd_pool[i] != -1) {
761 close(s->fd_pool[i]);
767 static void raw_close(BlockDriverState *bs)
769 BDRVRawState *s = bs->opaque;
773 #if defined(O_DIRECT)
774 if (s->aligned_buf != NULL)
775 qemu_free(s->aligned_buf);
778 raw_close_fd_pool(s);
781 static int raw_truncate(BlockDriverState *bs, int64_t offset)
783 BDRVRawState *s = bs->opaque;
784 if (s->type != FTYPE_FILE)
786 if (ftruncate(s->fd, offset) < 0)
792 static int64_t raw_getlength(BlockDriverState *bs)
794 BDRVRawState *s = bs->opaque;
800 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
803 if (ioctl(fd, DIOCGDINFO, &dl))
805 return (uint64_t)dl.d_secsize *
806 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
810 #else /* !__OpenBSD__ */
811 static int64_t raw_getlength(BlockDriverState *bs)
813 BDRVRawState *s = bs->opaque;
820 struct dk_minfo minfo;
830 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
831 #ifdef DIOCGMEDIASIZE
832 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
835 size = LONG_LONG_MAX;
837 size = lseek(fd, 0LL, SEEK_END);
843 * use the DKIOCGMEDIAINFO ioctl to read the size.
845 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
847 size = minfo.dki_lbsize * minfo.dki_capacity;
848 } else /* there are reports that lseek on some devices
849 fails, but irc discussion said that contingency
850 on contingency was overkill */
853 size = lseek(fd, 0, SEEK_END);
859 static int raw_create(const char *filename, int64_t total_size,
860 const char *backing_file, int flags)
864 if (flags || backing_file)
867 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
871 ftruncate(fd, total_size * 512);
876 static void raw_flush(BlockDriverState *bs)
878 BDRVRawState *s = bs->opaque;
882 BlockDriver bdrv_raw = {
884 sizeof(BDRVRawState),
885 NULL, /* no probe for protocols */
894 .bdrv_aio_read = raw_aio_read,
895 .bdrv_aio_write = raw_aio_write,
896 .bdrv_aio_cancel = raw_aio_cancel,
897 .aiocb_size = sizeof(RawAIOCB),
899 .bdrv_pread = raw_pread,
900 .bdrv_pwrite = raw_pwrite,
901 .bdrv_truncate = raw_truncate,
902 .bdrv_getlength = raw_getlength,
905 /***********************************************/
909 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
910 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
912 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
914 kern_return_t kernResult;
915 mach_port_t masterPort;
916 CFMutableDictionaryRef classesToMatch;
918 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
919 if ( KERN_SUCCESS != kernResult ) {
920 printf( "IOMasterPort returned %d\n", kernResult );
923 classesToMatch = IOServiceMatching( kIOCDMediaClass );
924 if ( classesToMatch == NULL ) {
925 printf( "IOServiceMatching returned a NULL dictionary.\n" );
927 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
929 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
930 if ( KERN_SUCCESS != kernResult )
932 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
938 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
940 io_object_t nextMedia;
941 kern_return_t kernResult = KERN_FAILURE;
943 nextMedia = IOIteratorNext( mediaIterator );
946 CFTypeRef bsdPathAsCFString;
947 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
948 if ( bsdPathAsCFString ) {
949 size_t devPathLength;
950 strcpy( bsdPath, _PATH_DEV );
951 strcat( bsdPath, "r" );
952 devPathLength = strlen( bsdPath );
953 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
954 kernResult = KERN_SUCCESS;
956 CFRelease( bsdPathAsCFString );
958 IOObjectRelease( nextMedia );
966 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
968 BDRVRawState *s = bs->opaque;
969 int fd, open_flags, ret, i;
974 if (strstart(filename, "/dev/cdrom", NULL)) {
975 kern_return_t kernResult;
976 io_iterator_t mediaIterator;
977 char bsdPath[ MAXPATHLEN ];
980 kernResult = FindEjectableCDMedia( &mediaIterator );
981 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
983 if ( bsdPath[ 0 ] != '\0' ) {
984 strcat(bsdPath,"s0");
985 /* some CDs don't have a partition 0 */
986 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
988 bsdPath[strlen(bsdPath)-1] = '1';
996 IOObjectRelease( mediaIterator );
999 open_flags = O_BINARY;
1000 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
1001 open_flags |= O_RDWR;
1003 open_flags |= O_RDONLY;
1007 if (flags & BDRV_O_DIRECT)
1008 open_flags |= O_DIRECT;
1011 s->type = FTYPE_FILE;
1012 #if defined(__linux__)
1013 if (strstart(filename, "/dev/cd", NULL)) {
1014 /* open will not fail even if no CD is inserted */
1015 open_flags |= O_NONBLOCK;
1017 } else if (strstart(filename, "/dev/fd", NULL)) {
1019 s->fd_open_flags = open_flags;
1020 /* open will not fail even if no floppy is inserted */
1021 open_flags |= O_NONBLOCK;
1022 } else if (strstart(filename, "/dev/sg", NULL)) {
1026 fd = open(filename, open_flags, 0644);
1034 for (i = 0; i < RAW_FD_POOL_SIZE; i++)
1036 #if defined(__linux__)
1037 /* close fd so that we can reopen it as needed */
1038 if (s->type == FTYPE_FD) {
1041 s->fd_media_changed = 1;
1047 #if defined(__linux__)
1048 /* Note: we do not have a reliable method to detect if the floppy is
1049 present. The current method is to try to open the floppy at every
1050 I/O and to keep it opened during a few hundreds of ms. */
1051 static int fd_open(BlockDriverState *bs)
1053 BDRVRawState *s = bs->opaque;
1054 int last_media_present;
1056 if (s->type != FTYPE_FD)
1058 last_media_present = (s->fd >= 0);
1060 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1063 raw_close_fd_pool(s);
1065 printf("Floppy closed\n");
1069 if (s->fd_got_error &&
1070 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1072 printf("No floppy (open delayed)\n");
1076 s->fd = open(bs->filename, s->fd_open_flags);
1078 s->fd_error_time = qemu_get_clock(rt_clock);
1079 s->fd_got_error = 1;
1080 if (last_media_present)
1081 s->fd_media_changed = 1;
1083 printf("No floppy\n");
1088 printf("Floppy opened\n");
1091 if (!last_media_present)
1092 s->fd_media_changed = 1;
1093 s->fd_open_time = qemu_get_clock(rt_clock);
1094 s->fd_got_error = 0;
1098 static int raw_is_inserted(BlockDriverState *bs)
1100 BDRVRawState *s = bs->opaque;
1105 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1106 if (ret == CDS_DISC_OK)
1119 /* currently only used by fdc.c, but a CD version would be good too */
1120 static int raw_media_changed(BlockDriverState *bs)
1122 BDRVRawState *s = bs->opaque;
1128 /* XXX: we do not have a true media changed indication. It
1129 does not work if the floppy is changed without trying
1132 ret = s->fd_media_changed;
1133 s->fd_media_changed = 0;
1135 printf("Floppy changed=%d\n", ret);
1144 static int raw_eject(BlockDriverState *bs, int eject_flag)
1146 BDRVRawState *s = bs->opaque;
1151 if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1152 perror("CDROMEJECT");
1154 if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1155 perror("CDROMEJECT");
1164 raw_close_fd_pool(s);
1166 fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1168 if (ioctl(fd, FDEJECT, 0) < 0)
1180 static int raw_set_locked(BlockDriverState *bs, int locked)
1182 BDRVRawState *s = bs->opaque;
1186 if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1187 /* Note: an error can happen if the distribution automatically
1188 mounts the CD-ROM */
1189 // perror("CDROM_LOCKDOOR");
1198 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1200 BDRVRawState *s = bs->opaque;
1202 return ioctl(s->fd, req, buf);
1206 static int fd_open(BlockDriverState *bs)
1211 static int raw_is_inserted(BlockDriverState *bs)
1216 static int raw_media_changed(BlockDriverState *bs)
1221 static int raw_eject(BlockDriverState *bs, int eject_flag)
1226 static int raw_set_locked(BlockDriverState *bs, int locked)
1231 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1237 BlockDriver bdrv_host_device = {
1239 sizeof(BDRVRawState),
1240 NULL, /* no probe for protocols */
1249 .bdrv_aio_read = raw_aio_read,
1250 .bdrv_aio_write = raw_aio_write,
1251 .bdrv_aio_cancel = raw_aio_cancel,
1252 .aiocb_size = sizeof(RawAIOCB),
1254 .bdrv_pread = raw_pread,
1255 .bdrv_pwrite = raw_pwrite,
1256 .bdrv_getlength = raw_getlength,
1258 /* removable device support */
1259 .bdrv_is_inserted = raw_is_inserted,
1260 .bdrv_media_changed = raw_media_changed,
1261 .bdrv_eject = raw_eject,
1262 .bdrv_set_locked = raw_set_locked,
1263 /* generic scsi device */
1264 .bdrv_ioctl = raw_ioctl,