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...)
76
/* OS X does not have O_DSYNC */
78
#define O_DSYNC O_SYNC
81
/* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
83
#define O_DIRECT O_DSYNC
90
#define ALIGNED_BUFFER_SIZE (32 * 512)
92
/* if the FD is not accessed during that time (in ms), we try to
93
reopen it to see if the disk has been changed */
94
#define FD_OPEN_TIMEOUT 1000
96
/* posix-aio doesn't allow multiple outstanding requests to a single file
97
* descriptor. we implement a pool of dup()'d file descriptors to work
99
#define RAW_FD_POOL_SIZE 64
101
typedef struct BDRVRawState {
104
unsigned int lseek_err_cnt;
105
int fd_pool[RAW_FD_POOL_SIZE];
106
#if defined(__linux__)
107
/* 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
static int raw_open(BlockDriverState *bs, const char *filename, int flags)
123
BDRVRawState *s = bs->opaque;
124
int fd, open_flags, ret;
129
s->lseek_err_cnt = 0;
131
open_flags = O_BINARY;
132
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
133
open_flags |= O_RDWR;
135
open_flags |= O_RDONLY;
138
if (flags & BDRV_O_CREAT)
139
open_flags |= O_CREAT | O_TRUNC;
141
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
142
* and O_DIRECT for no caching. */
143
if ((flags & BDRV_O_NOCACHE))
144
open_flags |= O_DIRECT;
145
else if (!(flags & BDRV_O_CACHE_WB))
146
open_flags |= O_DSYNC;
148
s->type = FTYPE_FILE;
150
fd = open(filename, open_flags, 0644);
158
for (i = 0; i < RAW_FD_POOL_SIZE; i++)
160
s->aligned_buf = NULL;
161
if ((flags & BDRV_O_NOCACHE)) {
162
s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
163
if (s->aligned_buf == NULL) {
172
/* XXX: use host sector size if necessary with:
173
#ifdef DIOCGSECTORSIZE
175
unsigned int sectorsize = 512;
176
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
177
sectorsize > bufsize)
178
bufsize = sectorsize;
182
u_int32_t blockSize = 512;
183
if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
190
* offset and count are in bytes, but must be multiples of 512 for files
191
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
193
* This function may be called without alignment if the caller ensures
194
* that O_DIRECT is not in effect.
196
static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
197
uint8_t *buf, int count)
199
BDRVRawState *s = bs->opaque;
206
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
207
++(s->lseek_err_cnt);
208
if(s->lseek_err_cnt <= 10) {
209
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
210
"] lseek failed : %d = %s\n",
211
s->fd, bs->filename, offset, buf, count,
212
bs->total_sectors, errno, strerror(errno));
218
ret = read(s->fd, buf, count);
220
goto label__raw_read__success;
222
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
223
"] read failed %d : %d = %s\n",
224
s->fd, bs->filename, offset, buf, count,
225
bs->total_sectors, ret, errno, strerror(errno));
227
/* Try harder for CDrom. */
228
if (bs->type == BDRV_TYPE_CDROM) {
229
lseek(s->fd, offset, SEEK_SET);
230
ret = read(s->fd, buf, count);
232
goto label__raw_read__success;
233
lseek(s->fd, offset, SEEK_SET);
234
ret = read(s->fd, buf, count);
236
goto label__raw_read__success;
238
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
239
"] retry read failed %d : %d = %s\n",
240
s->fd, bs->filename, offset, buf, count,
241
bs->total_sectors, ret, errno, strerror(errno));
244
label__raw_read__success:
250
* offset and count are in bytes, but must be multiples of 512 for files
251
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
253
* This function may be called without alignment if the caller ensures
254
* that O_DIRECT is not in effect.
256
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
257
const uint8_t *buf, int count)
259
BDRVRawState *s = bs->opaque;
266
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
267
++(s->lseek_err_cnt);
268
if(s->lseek_err_cnt) {
269
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
270
PRId64 "] lseek failed : %d = %s\n",
271
s->fd, bs->filename, offset, buf, count,
272
bs->total_sectors, errno, strerror(errno));
276
s->lseek_err_cnt = 0;
278
ret = write(s->fd, buf, count);
280
goto label__raw_write__success;
282
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
283
"] write failed %d : %d = %s\n",
284
s->fd, bs->filename, offset, buf, count,
285
bs->total_sectors, ret, errno, strerror(errno));
287
label__raw_write__success:
294
* offset and count are in bytes and possibly not aligned. For files opened
295
* with O_DIRECT, necessary alignments are ensured before calling
296
* raw_pread_aligned to do the actual read.
298
static int raw_pread(BlockDriverState *bs, int64_t offset,
299
uint8_t *buf, int count)
301
BDRVRawState *s = bs->opaque;
302
int size, ret, shift, sum;
306
if (s->aligned_buf != NULL) {
308
if (offset & 0x1ff) {
309
/* align offset on a 512 bytes boundary */
311
shift = offset & 0x1ff;
312
size = (shift + count + 0x1ff) & ~0x1ff;
313
if (size > ALIGNED_BUFFER_SIZE)
314
size = ALIGNED_BUFFER_SIZE;
315
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
322
memcpy(buf, s->aligned_buf + shift, size);
332
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
334
/* read on aligned buffer */
338
size = (count + 0x1ff) & ~0x1ff;
339
if (size > ALIGNED_BUFFER_SIZE)
340
size = ALIGNED_BUFFER_SIZE;
342
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
350
memcpy(buf, s->aligned_buf, size);
362
return raw_pread_aligned(bs, offset, buf, count) + sum;
366
* offset and count are in bytes and possibly not aligned. For files opened
367
* with O_DIRECT, necessary alignments are ensured before calling
368
* raw_pwrite_aligned to do the actual write.
370
static int raw_pwrite(BlockDriverState *bs, int64_t offset,
371
const uint8_t *buf, int count)
373
BDRVRawState *s = bs->opaque;
374
int size, ret, shift, sum;
378
if (s->aligned_buf != NULL) {
380
if (offset & 0x1ff) {
381
/* align offset on a 512 bytes boundary */
382
shift = offset & 0x1ff;
383
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
390
memcpy(s->aligned_buf + shift, buf, size);
392
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
404
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
406
while ((size = (count & ~0x1ff)) != 0) {
408
if (size > ALIGNED_BUFFER_SIZE)
409
size = ALIGNED_BUFFER_SIZE;
411
memcpy(s->aligned_buf, buf, size);
413
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
422
/* here, count < 512 because (count & ~0x1ff) == 0 */
424
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
427
memcpy(s->aligned_buf, buf, count);
429
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
440
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
444
/***********************************************************/
445
/* Unix AIO using POSIX AIO */
447
typedef struct RawAIOCB {
448
BlockDriverAIOCB common;
451
struct RawAIOCB *next;
455
typedef struct PosixAioState
461
static int raw_fd_pool_get(BDRVRawState *s)
465
for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
467
if (s->fd_pool[i] != -1)
470
/* try to dup file descriptor */
471
s->fd_pool[i] = dup(s->fd);
472
if (s->fd_pool[i] != -1)
473
return s->fd_pool[i];
476
/* we couldn't dup the file descriptor so just use the main one */
480
static void raw_fd_pool_put(RawAIOCB *acb)
482
BDRVRawState *s = acb->common.bs->opaque;
485
for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
486
if (s->fd_pool[i] == acb->fd) {
487
close(s->fd_pool[i]);
493
static void posix_aio_read(void *opaque)
495
PosixAioState *s = opaque;
496
RawAIOCB *acb, **pacb;
503
len = read(s->rfd, &byte, 1);
504
if (len == -1 && errno == EINTR)
506
if (len == -1 && errno == EAGAIN)
511
pacb = &s->first_aio;
516
ret = aio_error(&acb->aiocb);
517
if (ret == ECANCELED) {
518
/* remove the request */
520
raw_fd_pool_put(acb);
521
qemu_aio_release(acb);
522
} else if (ret != EINPROGRESS) {
525
ret = aio_return(&acb->aiocb);
526
if (ret == acb->aiocb.aio_nbytes)
533
/* remove the request */
535
/* call the callback */
536
acb->common.cb(acb->common.opaque, ret);
537
raw_fd_pool_put(acb);
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;
576
s = qemu_malloc(sizeof(PosixAioState));
580
sigfillset(&act.sa_mask);
581
act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
582
act.sa_handler = aio_signal_handler;
583
sigaction(SIGUSR2, &act, NULL);
586
if (pipe(fds) == -1) {
587
fprintf(stderr, "failed to create pipe\n");
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
#if defined(__linux__)
602
memset(&ai, 0, sizeof(ai));
603
#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 4)
607
/* XXX: aio thread exit seems to hang on RedHat 9 and this init
608
seems to fix the problem. */
611
ai.aio_idle_time = 365 * 100000;
621
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
622
int64_t sector_num, uint8_t *buf, int nb_sectors,
623
BlockDriverCompletionFunc *cb, void *opaque)
625
BDRVRawState *s = bs->opaque;
631
acb = qemu_aio_get(bs, cb, opaque);
634
acb->fd = raw_fd_pool_get(s);
635
acb->aiocb.aio_fildes = acb->fd;
636
acb->aiocb.aio_sigevent.sigev_signo = SIGUSR2;
637
acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
638
acb->aiocb.aio_buf = buf;
640
acb->aiocb.aio_nbytes = -nb_sectors;
642
acb->aiocb.aio_nbytes = nb_sectors * 512;
643
acb->aiocb.aio_offset = sector_num * 512;
644
acb->next = posix_aio_state->first_aio;
645
posix_aio_state->first_aio = acb;
649
static void raw_aio_em_cb(void* opaque)
651
RawAIOCB *acb = opaque;
652
acb->common.cb(acb->common.opaque, acb->ret);
653
qemu_aio_release(acb);
656
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
657
int64_t sector_num, uint8_t *buf, int nb_sectors,
658
BlockDriverCompletionFunc *cb, void *opaque)
663
* If O_DIRECT is used and the buffer is not aligned fall back
666
BDRVRawState *s = bs->opaque;
668
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
670
acb = qemu_aio_get(bs, cb, opaque);
671
acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors);
672
bh = qemu_bh_new(raw_aio_em_cb, acb);
673
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
BDRVRawState *s = bs->opaque;
699
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
701
acb = qemu_aio_get(bs, cb, opaque);
702
acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors);
703
bh = qemu_bh_new(raw_aio_em_cb, acb);
704
qemu_bh_schedule(bh);
708
acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
711
if (aio_write(&acb->aiocb) < 0) {
712
qemu_aio_release(acb);
718
static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
721
RawAIOCB *acb = (RawAIOCB *)blockacb;
724
ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
725
if (ret == AIO_NOTCANCELED) {
726
/* fail safe: if the aio could not be canceled, we wait for
728
while (aio_error(&acb->aiocb) == EINPROGRESS);
731
/* remove the callback from the queue */
732
pacb = &posix_aio_state->first_aio;
736
} else if (*pacb == acb) {
738
raw_fd_pool_put(acb);
739
qemu_aio_release(acb);
746
#else /* CONFIG_AIO */
747
static int posix_aio_init(void)
751
#endif /* CONFIG_AIO */
753
static void raw_close_fd_pool(BDRVRawState *s)
757
for (i = 0; i < RAW_FD_POOL_SIZE; i++) {
758
if (s->fd_pool[i] != -1) {
759
close(s->fd_pool[i]);
765
static void raw_close(BlockDriverState *bs)
767
BDRVRawState *s = bs->opaque;
771
if (s->aligned_buf != NULL)
772
qemu_free(s->aligned_buf);
774
raw_close_fd_pool(s);
777
static int raw_truncate(BlockDriverState *bs, int64_t offset)
779
BDRVRawState *s = bs->opaque;
780
if (s->type != FTYPE_FILE)
782
if (ftruncate(s->fd, offset) < 0)
788
static int64_t raw_getlength(BlockDriverState *bs)
790
BDRVRawState *s = bs->opaque;
796
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
799
if (ioctl(fd, DIOCGDINFO, &dl))
801
return (uint64_t)dl.d_secsize *
802
dl.d_partitions[DISKPART(st.st_rdev)].p_size;
806
#else /* !__OpenBSD__ */
807
static int64_t raw_getlength(BlockDriverState *bs)
809
BDRVRawState *s = bs->opaque;
816
struct dk_minfo minfo;
826
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
827
#ifdef DIOCGMEDIASIZE
828
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
831
size = LONG_LONG_MAX;
833
size = lseek(fd, 0LL, SEEK_END);
839
* use the DKIOCGMEDIAINFO ioctl to read the size.
841
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
843
size = minfo.dki_lbsize * minfo.dki_capacity;
844
} else /* there are reports that lseek on some devices
845
fails, but irc discussion said that contingency
846
on contingency was overkill */
849
size = lseek(fd, 0, SEEK_END);
855
static int raw_create(const char *filename, int64_t total_size,
856
const char *backing_file, int flags)
860
if (flags || backing_file)
863
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
867
ftruncate(fd, total_size * 512);
872
static void raw_flush(BlockDriverState *bs)
874
BDRVRawState *s = bs->opaque;
878
BlockDriver bdrv_raw = {
880
sizeof(BDRVRawState),
881
NULL, /* no probe for protocols */
890
.bdrv_aio_read = raw_aio_read,
891
.bdrv_aio_write = raw_aio_write,
892
.bdrv_aio_cancel = raw_aio_cancel,
893
.aiocb_size = sizeof(RawAIOCB),
895
.bdrv_pread = raw_pread,
896
.bdrv_pwrite = raw_pwrite,
897
.bdrv_truncate = raw_truncate,
898
.bdrv_getlength = raw_getlength,
901
/***********************************************/
905
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
906
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
908
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
910
kern_return_t kernResult;
911
mach_port_t masterPort;
912
CFMutableDictionaryRef classesToMatch;
914
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
915
if ( KERN_SUCCESS != kernResult ) {
916
printf( "IOMasterPort returned %d\n", kernResult );
919
classesToMatch = IOServiceMatching( kIOCDMediaClass );
920
if ( classesToMatch == NULL ) {
921
printf( "IOServiceMatching returned a NULL dictionary.\n" );
923
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
925
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
926
if ( KERN_SUCCESS != kernResult )
928
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
934
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
936
io_object_t nextMedia;
937
kern_return_t kernResult = KERN_FAILURE;
939
nextMedia = IOIteratorNext( mediaIterator );
942
CFTypeRef bsdPathAsCFString;
943
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
944
if ( bsdPathAsCFString ) {
945
size_t devPathLength;
946
strcpy( bsdPath, _PATH_DEV );
947
strcat( bsdPath, "r" );
948
devPathLength = strlen( bsdPath );
949
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
950
kernResult = KERN_SUCCESS;
952
CFRelease( bsdPathAsCFString );
954
IOObjectRelease( nextMedia );
962
static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
964
BDRVRawState *s = bs->opaque;
965
int fd, open_flags, ret, i;
970
if (strstart(filename, "/dev/cdrom", NULL)) {
971
kern_return_t kernResult;
972
io_iterator_t mediaIterator;
973
char bsdPath[ MAXPATHLEN ];
976
kernResult = FindEjectableCDMedia( &mediaIterator );
977
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
979
if ( bsdPath[ 0 ] != '\0' ) {
980
strcat(bsdPath,"s0");
981
/* some CDs don't have a partition 0 */
982
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
984
bsdPath[strlen(bsdPath)-1] = '1';
992
IOObjectRelease( mediaIterator );
995
open_flags = O_BINARY;
996
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
997
open_flags |= O_RDWR;
999
open_flags |= O_RDONLY;
1002
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
1003
* and O_DIRECT for no caching. */
1004
if ((flags & BDRV_O_NOCACHE))
1005
open_flags |= O_DIRECT;
1006
else if (!(flags & BDRV_O_CACHE_WB))
1007
open_flags |= O_DSYNC;
1009
s->type = FTYPE_FILE;
1010
#if defined(__linux__)
1011
if (strstart(filename, "/dev/cd", NULL)) {
1012
/* open will not fail even if no CD is inserted */
1013
open_flags |= O_NONBLOCK;
1015
} else if (strstart(filename, "/dev/fd", NULL)) {
1017
s->fd_open_flags = open_flags;
1018
/* open will not fail even if no floppy is inserted */
1019
open_flags |= O_NONBLOCK;
1020
} else if (strstart(filename, "/dev/sg", NULL)) {
1024
fd = open(filename, open_flags, 0644);
1032
for (i = 0; i < RAW_FD_POOL_SIZE; i++)
1034
#if defined(__linux__)
1035
/* close fd so that we can reopen it as needed */
1036
if (s->type == FTYPE_FD) {
1039
s->fd_media_changed = 1;
1045
#if defined(__linux__)
1046
/* Note: we do not have a reliable method to detect if the floppy is
1047
present. The current method is to try to open the floppy at every
1048
I/O and to keep it opened during a few hundreds of ms. */
1049
static int fd_open(BlockDriverState *bs)
1051
BDRVRawState *s = bs->opaque;
1052
int last_media_present;
1054
if (s->type != FTYPE_FD)
1056
last_media_present = (s->fd >= 0);
1058
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1061
raw_close_fd_pool(s);
1063
printf("Floppy closed\n");
1067
if (s->fd_got_error &&
1068
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1070
printf("No floppy (open delayed)\n");
1074
s->fd = open(bs->filename, s->fd_open_flags);
1076
s->fd_error_time = qemu_get_clock(rt_clock);
1077
s->fd_got_error = 1;
1078
if (last_media_present)
1079
s->fd_media_changed = 1;
1081
printf("No floppy\n");
1086
printf("Floppy opened\n");
1089
if (!last_media_present)
1090
s->fd_media_changed = 1;
1091
s->fd_open_time = qemu_get_clock(rt_clock);
1092
s->fd_got_error = 0;
1096
static int raw_is_inserted(BlockDriverState *bs)
1098
BDRVRawState *s = bs->opaque;
1103
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1104
if (ret == CDS_DISC_OK)
1117
/* currently only used by fdc.c, but a CD version would be good too */
1118
static int raw_media_changed(BlockDriverState *bs)
1120
BDRVRawState *s = bs->opaque;
1126
/* XXX: we do not have a true media changed indication. It
1127
does not work if the floppy is changed without trying
1130
ret = s->fd_media_changed;
1131
s->fd_media_changed = 0;
1133
printf("Floppy changed=%d\n", ret);
1142
static int raw_eject(BlockDriverState *bs, int eject_flag)
1144
BDRVRawState *s = bs->opaque;
1149
if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1150
perror("CDROMEJECT");
1152
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1153
perror("CDROMEJECT");
1162
raw_close_fd_pool(s);
1164
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1166
if (ioctl(fd, FDEJECT, 0) < 0)
1178
static int raw_set_locked(BlockDriverState *bs, int locked)
1180
BDRVRawState *s = bs->opaque;
1184
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1185
/* Note: an error can happen if the distribution automatically
1186
mounts the CD-ROM */
1187
// perror("CDROM_LOCKDOOR");
1196
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1198
BDRVRawState *s = bs->opaque;
1200
return ioctl(s->fd, req, buf);
1204
static int fd_open(BlockDriverState *bs)
1209
static int raw_is_inserted(BlockDriverState *bs)
1214
static int raw_media_changed(BlockDriverState *bs)
1219
static int raw_eject(BlockDriverState *bs, int eject_flag)
1224
static int raw_set_locked(BlockDriverState *bs, int locked)
1229
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1235
BlockDriver bdrv_host_device = {
1237
sizeof(BDRVRawState),
1238
NULL, /* no probe for protocols */
1247
.bdrv_aio_read = raw_aio_read,
1248
.bdrv_aio_write = raw_aio_write,
1249
.bdrv_aio_cancel = raw_aio_cancel,
1250
.aiocb_size = sizeof(RawAIOCB),
1252
.bdrv_pread = raw_pread,
1253
.bdrv_pwrite = raw_pwrite,
1254
.bdrv_getlength = raw_getlength,
1256
/* removable device support */
1257
.bdrv_is_inserted = raw_is_inserted,
1258
.bdrv_media_changed = raw_media_changed,
1259
.bdrv_eject = raw_eject,
1260
.bdrv_set_locked = raw_set_locked,
1261
/* generic scsi device */
1262
.bdrv_ioctl = raw_ioctl,
added
removed
block-raw-posix.c
