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"
36 #include <sys/param.h>
37 #include <IOKit/IOKitLib.h>
38 #include <IOKit/IOBSD.h>
39 #include <IOKit/storage/IOMediaBSDClient.h>
40 #include <IOKit/storage/IOMedia.h>
41 #include <IOKit/storage/IOCDMedia.h>
42 //#include <IOKit/storage/IOCDTypes.h>
43 #include <CoreFoundation/CoreFoundation.h>
47 #define _POSIX_PTHREAD_SEMANTICS 1
52 #include <sys/ioctl.h>
53 #include <linux/cdrom.h>
62 #include <sys/ioctl.h>
63 #include <sys/disklabel.h>
67 //#define DEBUG_FLOPPY
70 #if defined(DEBUG_BLOCK)
71 #define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \
72 { fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0)
74 #define DEBUG_BLOCK_PRINT(formatCstr, args...)
81 #define ALIGNED_BUFFER_SIZE (32 * 512)
83 /* if the FD is not accessed during that time (in ms), we try to
84 reopen it to see if the disk has been changed */
85 #define FD_OPEN_TIMEOUT 1000
87 /* posix-aio doesn't allow multiple outstanding requests to a single file
88 * descriptor. we implement a pool of dup()'d file descriptors to work
90 #define RAW_FD_POOL_SIZE 64
92 typedef struct BDRVRawState {
95 unsigned int lseek_err_cnt;
96 int fd_pool[RAW_FD_POOL_SIZE];
97 #if defined(__linux__)
98 /* linux floppy specific */
100 int64_t fd_open_time;
101 int64_t fd_error_time;
103 int fd_media_changed;
105 #if defined(O_DIRECT)
106 uint8_t* aligned_buf;
110 static int posix_aio_init(void);
112 static int fd_open(BlockDriverState *bs);
114 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
116 BDRVRawState *s = bs->opaque;
117 int fd, open_flags, ret;
122 s->lseek_err_cnt = 0;
124 open_flags = O_BINARY;
125 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
126 open_flags |= O_RDWR;
128 open_flags |= O_RDONLY;
131 if (flags & BDRV_O_CREAT)
132 open_flags |= O_CREAT | O_TRUNC;
134 if (flags & BDRV_O_DIRECT)
135 open_flags |= O_DIRECT;
138 s->type = FTYPE_FILE;
140 fd = open(filename, open_flags, 0644);
148 for (i = 0; i < RAW_FD_POOL_SIZE; i++)
150 #if defined(O_DIRECT)
151 s->aligned_buf = NULL;
152 if (flags & BDRV_O_DIRECT) {
153 s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
154 if (s->aligned_buf == NULL) {
164 /* XXX: use host sector size if necessary with:
165 #ifdef DIOCGSECTORSIZE
167 unsigned int sectorsize = 512;
168 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
169 sectorsize > bufsize)
170 bufsize = sectorsize;
174 u_int32_t blockSize = 512;
175 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
182 * offset and count are in bytes, but must be multiples of 512 for files
183 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
185 * This function may be called without alignment if the caller ensures
186 * that O_DIRECT is not in effect.
188 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
189 uint8_t *buf, int count)
191 BDRVRawState *s = bs->opaque;
198 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
199 ++(s->lseek_err_cnt);
200 if(s->lseek_err_cnt <= 10) {
201 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
202 "] lseek failed : %d = %s\n",
203 s->fd, bs->filename, offset, buf, count,
204 bs->total_sectors, errno, strerror(errno));
210 ret = read(s->fd, buf, count);
212 goto label__raw_read__success;
214 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
215 "] read failed %d : %d = %s\n",
216 s->fd, bs->filename, offset, buf, count,
217 bs->total_sectors, ret, errno, strerror(errno));
219 /* Try harder for CDrom. */
220 if (bs->type == BDRV_TYPE_CDROM) {
221 lseek(s->fd, offset, SEEK_SET);
222 ret = read(s->fd, buf, count);
224 goto label__raw_read__success;
225 lseek(s->fd, offset, SEEK_SET);
226 ret = read(s->fd, buf, count);
228 goto label__raw_read__success;
230 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
231 "] retry read failed %d : %d = %s\n",
232 s->fd, bs->filename, offset, buf, count,
233 bs->total_sectors, ret, errno, strerror(errno));
236 label__raw_read__success:
242 * offset and count are in bytes, but must be multiples of 512 for files
243 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
245 * This function may be called without alignment if the caller ensures
246 * that O_DIRECT is not in effect.
248 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
249 const uint8_t *buf, int count)
251 BDRVRawState *s = bs->opaque;
258 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
259 ++(s->lseek_err_cnt);
260 if(s->lseek_err_cnt) {
261 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
262 PRId64 "] lseek failed : %d = %s\n",
263 s->fd, bs->filename, offset, buf, count,
264 bs->total_sectors, errno, strerror(errno));
268 s->lseek_err_cnt = 0;
270 ret = write(s->fd, buf, count);
272 goto label__raw_write__success;
274 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
275 "] write failed %d : %d = %s\n",
276 s->fd, bs->filename, offset, buf, count,
277 bs->total_sectors, ret, errno, strerror(errno));
279 label__raw_write__success:
285 #if defined(O_DIRECT)
287 * offset and count are in bytes and possibly not aligned. For files opened
288 * with O_DIRECT, necessary alignments are ensured before calling
289 * raw_pread_aligned to do the actual read.
291 static int raw_pread(BlockDriverState *bs, int64_t offset,
292 uint8_t *buf, int count)
294 BDRVRawState *s = bs->opaque;
295 int size, ret, shift, sum;
299 if (s->aligned_buf != NULL) {
301 if (offset & 0x1ff) {
302 /* align offset on a 512 bytes boundary */
304 shift = offset & 0x1ff;
305 size = (shift + count + 0x1ff) & ~0x1ff;
306 if (size > ALIGNED_BUFFER_SIZE)
307 size = ALIGNED_BUFFER_SIZE;
308 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
315 memcpy(buf, s->aligned_buf + shift, size);
325 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
327 /* read on aligned buffer */
331 size = (count + 0x1ff) & ~0x1ff;
332 if (size > ALIGNED_BUFFER_SIZE)
333 size = ALIGNED_BUFFER_SIZE;
335 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
343 memcpy(buf, s->aligned_buf, size);
355 return raw_pread_aligned(bs, offset, buf, count) + sum;
359 * offset and count are in bytes and possibly not aligned. For files opened
360 * with O_DIRECT, necessary alignments are ensured before calling
361 * raw_pwrite_aligned to do the actual write.
363 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
364 const uint8_t *buf, int count)
366 BDRVRawState *s = bs->opaque;
367 int size, ret, shift, sum;
371 if (s->aligned_buf != NULL) {
373 if (offset & 0x1ff) {
374 /* align offset on a 512 bytes boundary */
375 shift = offset & 0x1ff;
376 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
383 memcpy(s->aligned_buf + shift, buf, size);
385 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
397 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
399 while ((size = (count & ~0x1ff)) != 0) {
401 if (size > ALIGNED_BUFFER_SIZE)
402 size = ALIGNED_BUFFER_SIZE;
404 memcpy(s->aligned_buf, buf, size);
406 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
415 /* here, count < 512 because (count & ~0x1ff) == 0 */
417 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
420 memcpy(s->aligned_buf, buf, count);
422 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
433 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
437 #define raw_pread raw_pread_aligned
438 #define raw_pwrite raw_pwrite_aligned
443 /***********************************************************/
444 /* Unix AIO using POSIX AIO */
446 typedef struct RawAIOCB {
447 BlockDriverAIOCB common;
450 struct RawAIOCB *next;
454 typedef struct PosixAioState
460 static int raw_fd_pool_get(BDRVRawState *s)
464 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
466 if (s->fd_pool[i] != -1)
469 /* try to dup file descriptor */
470 s->fd_pool[i] = dup(s->fd);
471 if (s->fd_pool[i] != -1)
472 return s->fd_pool[i];
475 /* we couldn't dup the file descriptor so just use the main one */
479 static void raw_fd_pool_put(RawAIOCB *acb)
481 BDRVRawState *s = acb->common.bs->opaque;
484 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
485 if (s->fd_pool[i] == acb->fd) {
486 close(s->fd_pool[i]);
492 static void posix_aio_read(void *opaque)
494 PosixAioState *s = opaque;
495 RawAIOCB *acb, **pacb;
499 struct qemu_signalfd_siginfo siginfo;
503 /* try to read from signalfd, don't freak out if we can't read anything */
505 while (offset < 128) {
508 len = read(s->fd, sig.buf + offset, 128 - offset);
509 if (len == -1 && errno == EINTR)
511 if (len == -1 && errno == EAGAIN) {
512 /* there is no natural reason for this to happen,
513 * so we'll spin hard until we get everything just
514 * to be on the safe side. */
523 pacb = &s->first_aio;
528 ret = aio_error(&acb->aiocb);
529 if (ret == ECANCELED) {
530 /* remove the request */
532 raw_fd_pool_put(acb);
533 qemu_aio_release(acb);
534 } else if (ret != EINPROGRESS) {
537 ret = aio_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 raw_fd_pool_put(acb);
550 qemu_aio_release(acb);
560 static int posix_aio_flush(void *opaque)
562 PosixAioState *s = opaque;
563 return !!s->first_aio;
566 static PosixAioState *posix_aio_state;
568 static int posix_aio_init(void)
576 s = qemu_malloc(sizeof(PosixAioState));
580 /* Make sure to block AIO signal */
582 sigaddset(&mask, SIGUSR2);
583 sigprocmask(SIG_BLOCK, &mask, NULL);
586 s->fd = qemu_signalfd(&mask);
588 fcntl(s->fd, F_SETFL, O_NONBLOCK);
590 qemu_aio_set_fd_handler(s->fd, posix_aio_read, NULL, posix_aio_flush, s);
592 #if defined(__linux__)
596 memset(&ai, 0, sizeof(ai));
597 #if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 4)
601 /* XXX: aio thread exit seems to hang on RedHat 9 and this init
602 seems to fix the problem. */
605 ai.aio_idle_time = 365 * 100000;
615 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
616 int64_t sector_num, uint8_t *buf, int nb_sectors,
617 BlockDriverCompletionFunc *cb, void *opaque)
619 BDRVRawState *s = bs->opaque;
625 acb = qemu_aio_get(bs, cb, opaque);
628 acb->fd = raw_fd_pool_get(s);
629 acb->aiocb.aio_fildes = acb->fd;
630 acb->aiocb.aio_sigevent.sigev_signo = SIGUSR2;
631 acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
632 acb->aiocb.aio_buf = buf;
634 acb->aiocb.aio_nbytes = -nb_sectors;
636 acb->aiocb.aio_nbytes = nb_sectors * 512;
637 acb->aiocb.aio_offset = sector_num * 512;
638 acb->next = posix_aio_state->first_aio;
639 posix_aio_state->first_aio = acb;
643 static void raw_aio_em_cb(void* opaque)
645 RawAIOCB *acb = opaque;
646 acb->common.cb(acb->common.opaque, acb->ret);
647 qemu_aio_release(acb);
650 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
651 int64_t sector_num, uint8_t *buf, int nb_sectors,
652 BlockDriverCompletionFunc *cb, void *opaque)
657 * If O_DIRECT is used and the buffer is not aligned fall back
660 #if defined(O_DIRECT)
661 BDRVRawState *s = bs->opaque;
663 if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
665 acb = qemu_aio_get(bs, cb, opaque);
666 acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors);
667 bh = qemu_bh_new(raw_aio_em_cb, acb);
668 qemu_bh_schedule(bh);
673 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
676 if (aio_read(&acb->aiocb) < 0) {
677 qemu_aio_release(acb);
683 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
684 int64_t sector_num, const uint8_t *buf, int nb_sectors,
685 BlockDriverCompletionFunc *cb, void *opaque)
690 * If O_DIRECT is used and the buffer is not aligned fall back
693 #if defined(O_DIRECT)
694 BDRVRawState *s = bs->opaque;
696 if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
698 acb = qemu_aio_get(bs, cb, opaque);
699 acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors);
700 bh = qemu_bh_new(raw_aio_em_cb, acb);
701 qemu_bh_schedule(bh);
706 acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
709 if (aio_write(&acb->aiocb) < 0) {
710 qemu_aio_release(acb);
716 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
719 RawAIOCB *acb = (RawAIOCB *)blockacb;
722 ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
723 if (ret == AIO_NOTCANCELED) {
724 /* fail safe: if the aio could not be canceled, we wait for
726 while (aio_error(&acb->aiocb) == EINPROGRESS);
729 /* remove the callback from the queue */
730 pacb = &posix_aio_state->first_aio;
734 } else if (*pacb == acb) {
736 raw_fd_pool_put(acb);
737 qemu_aio_release(acb);
744 #else /* CONFIG_AIO */
745 static int posix_aio_init(void)
748 #endif /* CONFIG_AIO */
750 static void raw_close_fd_pool(BDRVRawState *s)
754 for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
755 if (s->fd_pool[i] != -1) {
756 close(s->fd_pool[i]);
762 static void raw_close(BlockDriverState *bs)
764 BDRVRawState *s = bs->opaque;
768 #if defined(O_DIRECT)
769 if (s->aligned_buf != NULL)
770 qemu_free(s->aligned_buf);
773 raw_close_fd_pool(s);
776 static int raw_truncate(BlockDriverState *bs, int64_t offset)
778 BDRVRawState *s = bs->opaque;
779 if (s->type != FTYPE_FILE)
781 if (ftruncate(s->fd, offset) < 0)
787 static int64_t raw_getlength(BlockDriverState *bs)
789 BDRVRawState *s = bs->opaque;
795 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
798 if (ioctl(fd, DIOCGDINFO, &dl))
800 return (uint64_t)dl.d_secsize *
801 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
805 #else /* !__OpenBSD__ */
806 static int64_t raw_getlength(BlockDriverState *bs)
808 BDRVRawState *s = bs->opaque;
815 struct dk_minfo minfo;
825 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
826 #ifdef DIOCGMEDIASIZE
827 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
830 size = LONG_LONG_MAX;
832 size = lseek(fd, 0LL, SEEK_END);
838 * use the DKIOCGMEDIAINFO ioctl to read the size.
840 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
842 size = minfo.dki_lbsize * minfo.dki_capacity;
843 } else /* there are reports that lseek on some devices
844 fails, but irc discussion said that contingency
845 on contingency was overkill */
848 size = lseek(fd, 0, SEEK_END);
854 static int raw_create(const char *filename, int64_t total_size,
855 const char *backing_file, int flags)
859 if (flags || backing_file)
862 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
866 ftruncate(fd, total_size * 512);
871 static void raw_flush(BlockDriverState *bs)
873 BDRVRawState *s = bs->opaque;
877 BlockDriver bdrv_raw = {
879 sizeof(BDRVRawState),
880 NULL, /* no probe for protocols */
889 .bdrv_aio_read = raw_aio_read,
890 .bdrv_aio_write = raw_aio_write,
891 .bdrv_aio_cancel = raw_aio_cancel,
892 .aiocb_size = sizeof(RawAIOCB),
894 .bdrv_pread = raw_pread,
895 .bdrv_pwrite = raw_pwrite,
896 .bdrv_truncate = raw_truncate,
897 .bdrv_getlength = raw_getlength,
900 /***********************************************/
904 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
905 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
907 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
909 kern_return_t kernResult;
910 mach_port_t masterPort;
911 CFMutableDictionaryRef classesToMatch;
913 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
914 if ( KERN_SUCCESS != kernResult ) {
915 printf( "IOMasterPort returned %d\n", kernResult );
918 classesToMatch = IOServiceMatching( kIOCDMediaClass );
919 if ( classesToMatch == NULL ) {
920 printf( "IOServiceMatching returned a NULL dictionary.\n" );
922 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
924 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
925 if ( KERN_SUCCESS != kernResult )
927 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
933 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
935 io_object_t nextMedia;
936 kern_return_t kernResult = KERN_FAILURE;
938 nextMedia = IOIteratorNext( mediaIterator );
941 CFTypeRef bsdPathAsCFString;
942 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
943 if ( bsdPathAsCFString ) {
944 size_t devPathLength;
945 strcpy( bsdPath, _PATH_DEV );
946 strcat( bsdPath, "r" );
947 devPathLength = strlen( bsdPath );
948 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
949 kernResult = KERN_SUCCESS;
951 CFRelease( bsdPathAsCFString );
953 IOObjectRelease( nextMedia );
961 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
963 BDRVRawState *s = bs->opaque;
964 int fd, open_flags, ret, i;
969 if (strstart(filename, "/dev/cdrom", NULL)) {
970 kern_return_t kernResult;
971 io_iterator_t mediaIterator;
972 char bsdPath[ MAXPATHLEN ];
975 kernResult = FindEjectableCDMedia( &mediaIterator );
976 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
978 if ( bsdPath[ 0 ] != '\0' ) {
979 strcat(bsdPath,"s0");
980 /* some CDs don't have a partition 0 */
981 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
983 bsdPath[strlen(bsdPath)-1] = '1';
991 IOObjectRelease( mediaIterator );
994 open_flags = O_BINARY;
995 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
996 open_flags |= O_RDWR;
998 open_flags |= O_RDONLY;
1002 if (flags & BDRV_O_DIRECT)
1003 open_flags |= O_DIRECT;
1006 s->type = FTYPE_FILE;
1007 #if defined(__linux__)
1008 if (strstart(filename, "/dev/cd", NULL)) {
1009 /* open will not fail even if no CD is inserted */
1010 open_flags |= O_NONBLOCK;
1012 } else if (strstart(filename, "/dev/fd", NULL)) {
1014 s->fd_open_flags = open_flags;
1015 /* open will not fail even if no floppy is inserted */
1016 open_flags |= O_NONBLOCK;
1017 } else if (strstart(filename, "/dev/sg", NULL)) {
1021 fd = open(filename, open_flags, 0644);
1029 for (i = 0; i < RAW_FD_POOL_SIZE; i++)
1031 #if defined(__linux__)
1032 /* close fd so that we can reopen it as needed */
1033 if (s->type == FTYPE_FD) {
1036 s->fd_media_changed = 1;
1042 #if defined(__linux__)
1043 /* Note: we do not have a reliable method to detect if the floppy is
1044 present. The current method is to try to open the floppy at every
1045 I/O and to keep it opened during a few hundreds of ms. */
1046 static int fd_open(BlockDriverState *bs)
1048 BDRVRawState *s = bs->opaque;
1049 int last_media_present;
1051 if (s->type != FTYPE_FD)
1053 last_media_present = (s->fd >= 0);
1055 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1058 raw_close_fd_pool(s);
1060 printf("Floppy closed\n");
1064 if (s->fd_got_error &&
1065 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1067 printf("No floppy (open delayed)\n");
1071 s->fd = open(bs->filename, s->fd_open_flags);
1073 s->fd_error_time = qemu_get_clock(rt_clock);
1074 s->fd_got_error = 1;
1075 if (last_media_present)
1076 s->fd_media_changed = 1;
1078 printf("No floppy\n");
1083 printf("Floppy opened\n");
1086 if (!last_media_present)
1087 s->fd_media_changed = 1;
1088 s->fd_open_time = qemu_get_clock(rt_clock);
1089 s->fd_got_error = 0;
1093 static int raw_is_inserted(BlockDriverState *bs)
1095 BDRVRawState *s = bs->opaque;
1100 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1101 if (ret == CDS_DISC_OK)
1114 /* currently only used by fdc.c, but a CD version would be good too */
1115 static int raw_media_changed(BlockDriverState *bs)
1117 BDRVRawState *s = bs->opaque;
1123 /* XXX: we do not have a true media changed indication. It
1124 does not work if the floppy is changed without trying
1127 ret = s->fd_media_changed;
1128 s->fd_media_changed = 0;
1130 printf("Floppy changed=%d\n", ret);
1139 static int raw_eject(BlockDriverState *bs, int eject_flag)
1141 BDRVRawState *s = bs->opaque;
1146 if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1147 perror("CDROMEJECT");
1149 if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1150 perror("CDROMEJECT");
1159 raw_close_fd_pool(s);
1161 fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1163 if (ioctl(fd, FDEJECT, 0) < 0)
1175 static int raw_set_locked(BlockDriverState *bs, int locked)
1177 BDRVRawState *s = bs->opaque;
1181 if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1182 /* Note: an error can happen if the distribution automatically
1183 mounts the CD-ROM */
1184 // perror("CDROM_LOCKDOOR");
1193 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1195 BDRVRawState *s = bs->opaque;
1197 return ioctl(s->fd, req, buf);
1201 static int fd_open(BlockDriverState *bs)
1206 static int raw_is_inserted(BlockDriverState *bs)
1211 static int raw_media_changed(BlockDriverState *bs)
1216 static int raw_eject(BlockDriverState *bs, int eject_flag)
1221 static int raw_set_locked(BlockDriverState *bs, int locked)
1226 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1232 BlockDriver bdrv_host_device = {
1234 sizeof(BDRVRawState),
1235 NULL, /* no probe for protocols */
1244 .bdrv_aio_read = raw_aio_read,
1245 .bdrv_aio_write = raw_aio_write,
1246 .bdrv_aio_cancel = raw_aio_cancel,
1247 .aiocb_size = sizeof(RawAIOCB),
1249 .bdrv_pread = raw_pread,
1250 .bdrv_pwrite = raw_pwrite,
1251 .bdrv_getlength = raw_getlength,
1253 /* removable device support */
1254 .bdrv_is_inserted = raw_is_inserted,
1255 .bdrv_media_changed = raw_media_changed,
1256 .bdrv_eject = raw_eject,
1257 .bdrv_set_locked = raw_set_locked,
1258 /* generic scsi device */
1259 .bdrv_ioctl = raw_ioctl,