root / block-raw-posix.c @ 7b239bec
History | View | Annotate | Download (30.9 kB)
1 |
/*
|
---|---|
2 |
* Block driver for RAW files (posix)
|
3 |
*
|
4 |
* Copyright (c) 2006 Fabrice Bellard
|
5 |
*
|
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:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
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
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
#include "qemu-common.h" |
25 |
#include "qemu-timer.h" |
26 |
#include "qemu-char.h" |
27 |
#include "block_int.h" |
28 |
#include <assert.h> |
29 |
#ifdef CONFIG_AIO
|
30 |
#include "posix-aio-compat.h" |
31 |
#endif
|
32 |
|
33 |
#ifdef CONFIG_COCOA
|
34 |
#include <paths.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> |
43 |
#endif
|
44 |
|
45 |
#ifdef __sun__
|
46 |
#define _POSIX_PTHREAD_SEMANTICS 1 |
47 |
#include <signal.h> |
48 |
#include <sys/dkio.h> |
49 |
#endif
|
50 |
#ifdef __linux__
|
51 |
#include <sys/ioctl.h> |
52 |
#include <linux/cdrom.h> |
53 |
#include <linux/fd.h> |
54 |
#endif
|
55 |
#ifdef __FreeBSD__
|
56 |
#include <signal.h> |
57 |
#include <sys/disk.h> |
58 |
#endif
|
59 |
|
60 |
#ifdef __OpenBSD__
|
61 |
#include <sys/ioctl.h> |
62 |
#include <sys/disklabel.h> |
63 |
#include <sys/dkio.h> |
64 |
#endif
|
65 |
|
66 |
//#define DEBUG_FLOPPY
|
67 |
|
68 |
//#define DEBUG_BLOCK
|
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) |
72 |
#else
|
73 |
#define DEBUG_BLOCK_PRINT(formatCstr, args...)
|
74 |
#endif
|
75 |
|
76 |
/* OS X does not have O_DSYNC */
|
77 |
#ifndef O_DSYNC
|
78 |
#define O_DSYNC O_SYNC
|
79 |
#endif
|
80 |
|
81 |
/* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
|
82 |
#ifndef O_DIRECT
|
83 |
#define O_DIRECT O_DSYNC
|
84 |
#endif
|
85 |
|
86 |
#define FTYPE_FILE 0 |
87 |
#define FTYPE_CD 1 |
88 |
#define FTYPE_FD 2 |
89 |
|
90 |
#define ALIGNED_BUFFER_SIZE (32 * 512) |
91 |
|
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 |
95 |
|
96 |
typedef struct BDRVRawState { |
97 |
int fd;
|
98 |
int type;
|
99 |
unsigned int lseek_err_cnt; |
100 |
#if defined(__linux__)
|
101 |
/* linux floppy specific */
|
102 |
int fd_open_flags;
|
103 |
int64_t fd_open_time; |
104 |
int64_t fd_error_time; |
105 |
int fd_got_error;
|
106 |
int fd_media_changed;
|
107 |
#endif
|
108 |
uint8_t* aligned_buf; |
109 |
} BDRVRawState; |
110 |
|
111 |
static int posix_aio_init(void); |
112 |
|
113 |
static int fd_open(BlockDriverState *bs); |
114 |
|
115 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
116 |
{ |
117 |
BDRVRawState *s = bs->opaque; |
118 |
int fd, open_flags, ret;
|
119 |
|
120 |
posix_aio_init(); |
121 |
|
122 |
s->lseek_err_cnt = 0;
|
123 |
|
124 |
open_flags = O_BINARY; |
125 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
126 |
open_flags |= O_RDWR; |
127 |
} else {
|
128 |
open_flags |= O_RDONLY; |
129 |
bs->read_only = 1;
|
130 |
} |
131 |
if (flags & BDRV_O_CREAT)
|
132 |
open_flags |= O_CREAT | O_TRUNC; |
133 |
|
134 |
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
|
135 |
* and O_DIRECT for no caching. */
|
136 |
if ((flags & BDRV_O_NOCACHE))
|
137 |
open_flags |= O_DIRECT; |
138 |
else if (!(flags & BDRV_O_CACHE_WB)) |
139 |
open_flags |= O_DSYNC; |
140 |
|
141 |
s->type = FTYPE_FILE; |
142 |
|
143 |
fd = open(filename, open_flags, 0644);
|
144 |
if (fd < 0) { |
145 |
ret = -errno; |
146 |
if (ret == -EROFS)
|
147 |
ret = -EACCES; |
148 |
return ret;
|
149 |
} |
150 |
s->fd = fd; |
151 |
s->aligned_buf = NULL;
|
152 |
if ((flags & BDRV_O_NOCACHE)) {
|
153 |
s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
|
154 |
if (s->aligned_buf == NULL) { |
155 |
ret = -errno; |
156 |
close(fd); |
157 |
return ret;
|
158 |
} |
159 |
} |
160 |
return 0; |
161 |
} |
162 |
|
163 |
/* XXX: use host sector size if necessary with:
|
164 |
#ifdef DIOCGSECTORSIZE
|
165 |
{
|
166 |
unsigned int sectorsize = 512;
|
167 |
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
|
168 |
sectorsize > bufsize)
|
169 |
bufsize = sectorsize;
|
170 |
}
|
171 |
#endif
|
172 |
#ifdef CONFIG_COCOA
|
173 |
u_int32_t blockSize = 512;
|
174 |
if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
|
175 |
bufsize = blockSize;
|
176 |
}
|
177 |
#endif
|
178 |
*/
|
179 |
|
180 |
/*
|
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.
|
183 |
*
|
184 |
* This function may be called without alignment if the caller ensures
|
185 |
* that O_DIRECT is not in effect.
|
186 |
*/
|
187 |
static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, |
188 |
uint8_t *buf, int count)
|
189 |
{ |
190 |
BDRVRawState *s = bs->opaque; |
191 |
int ret;
|
192 |
|
193 |
ret = fd_open(bs); |
194 |
if (ret < 0) |
195 |
return ret;
|
196 |
|
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)); |
204 |
} |
205 |
return -1; |
206 |
} |
207 |
s->lseek_err_cnt=0;
|
208 |
|
209 |
ret = read(s->fd, buf, count); |
210 |
if (ret == count)
|
211 |
goto label__raw_read__success;
|
212 |
|
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)); |
217 |
|
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); |
222 |
if (ret == count)
|
223 |
goto label__raw_read__success;
|
224 |
lseek(s->fd, offset, SEEK_SET); |
225 |
ret = read(s->fd, buf, count); |
226 |
if (ret == count)
|
227 |
goto label__raw_read__success;
|
228 |
|
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)); |
233 |
} |
234 |
|
235 |
label__raw_read__success:
|
236 |
|
237 |
return ret;
|
238 |
} |
239 |
|
240 |
/*
|
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.
|
243 |
*
|
244 |
* This function may be called without alignment if the caller ensures
|
245 |
* that O_DIRECT is not in effect.
|
246 |
*/
|
247 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
248 |
const uint8_t *buf, int count) |
249 |
{ |
250 |
BDRVRawState *s = bs->opaque; |
251 |
int ret;
|
252 |
|
253 |
ret = fd_open(bs); |
254 |
if (ret < 0) |
255 |
return ret;
|
256 |
|
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)); |
264 |
} |
265 |
return -1; |
266 |
} |
267 |
s->lseek_err_cnt = 0;
|
268 |
|
269 |
ret = write(s->fd, buf, count); |
270 |
if (ret == count)
|
271 |
goto label__raw_write__success;
|
272 |
|
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)); |
277 |
|
278 |
label__raw_write__success:
|
279 |
|
280 |
return ret;
|
281 |
} |
282 |
|
283 |
|
284 |
/*
|
285 |
* offset and count are in bytes and possibly not aligned. For files opened
|
286 |
* with O_DIRECT, necessary alignments are ensured before calling
|
287 |
* raw_pread_aligned to do the actual read.
|
288 |
*/
|
289 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
290 |
uint8_t *buf, int count)
|
291 |
{ |
292 |
BDRVRawState *s = bs->opaque; |
293 |
int size, ret, shift, sum;
|
294 |
|
295 |
sum = 0;
|
296 |
|
297 |
if (s->aligned_buf != NULL) { |
298 |
|
299 |
if (offset & 0x1ff) { |
300 |
/* align offset on a 512 bytes boundary */
|
301 |
|
302 |
shift = offset & 0x1ff;
|
303 |
size = (shift + count + 0x1ff) & ~0x1ff; |
304 |
if (size > ALIGNED_BUFFER_SIZE)
|
305 |
size = ALIGNED_BUFFER_SIZE; |
306 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
307 |
if (ret < 0) |
308 |
return ret;
|
309 |
|
310 |
size = 512 - shift;
|
311 |
if (size > count)
|
312 |
size = count; |
313 |
memcpy(buf, s->aligned_buf + shift, size); |
314 |
|
315 |
buf += size; |
316 |
offset += size; |
317 |
count -= size; |
318 |
sum += size; |
319 |
|
320 |
if (count == 0) |
321 |
return sum;
|
322 |
} |
323 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
324 |
|
325 |
/* read on aligned buffer */
|
326 |
|
327 |
while (count) {
|
328 |
|
329 |
size = (count + 0x1ff) & ~0x1ff; |
330 |
if (size > ALIGNED_BUFFER_SIZE)
|
331 |
size = ALIGNED_BUFFER_SIZE; |
332 |
|
333 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
334 |
if (ret < 0) |
335 |
return ret;
|
336 |
|
337 |
size = ret; |
338 |
if (size > count)
|
339 |
size = count; |
340 |
|
341 |
memcpy(buf, s->aligned_buf, size); |
342 |
|
343 |
buf += size; |
344 |
offset += size; |
345 |
count -= size; |
346 |
sum += size; |
347 |
} |
348 |
|
349 |
return sum;
|
350 |
} |
351 |
} |
352 |
|
353 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
354 |
} |
355 |
|
356 |
/*
|
357 |
* offset and count are in bytes and possibly not aligned. For files opened
|
358 |
* with O_DIRECT, necessary alignments are ensured before calling
|
359 |
* raw_pwrite_aligned to do the actual write.
|
360 |
*/
|
361 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
362 |
const uint8_t *buf, int count) |
363 |
{ |
364 |
BDRVRawState *s = bs->opaque; |
365 |
int size, ret, shift, sum;
|
366 |
|
367 |
sum = 0;
|
368 |
|
369 |
if (s->aligned_buf != NULL) { |
370 |
|
371 |
if (offset & 0x1ff) { |
372 |
/* align offset on a 512 bytes boundary */
|
373 |
shift = offset & 0x1ff;
|
374 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
375 |
if (ret < 0) |
376 |
return ret;
|
377 |
|
378 |
size = 512 - shift;
|
379 |
if (size > count)
|
380 |
size = count; |
381 |
memcpy(s->aligned_buf + shift, buf, size); |
382 |
|
383 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
384 |
if (ret < 0) |
385 |
return ret;
|
386 |
|
387 |
buf += size; |
388 |
offset += size; |
389 |
count -= size; |
390 |
sum += size; |
391 |
|
392 |
if (count == 0) |
393 |
return sum;
|
394 |
} |
395 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
396 |
|
397 |
while ((size = (count & ~0x1ff)) != 0) { |
398 |
|
399 |
if (size > ALIGNED_BUFFER_SIZE)
|
400 |
size = ALIGNED_BUFFER_SIZE; |
401 |
|
402 |
memcpy(s->aligned_buf, buf, size); |
403 |
|
404 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
405 |
if (ret < 0) |
406 |
return ret;
|
407 |
|
408 |
buf += ret; |
409 |
offset += ret; |
410 |
count -= ret; |
411 |
sum += ret; |
412 |
} |
413 |
/* here, count < 512 because (count & ~0x1ff) == 0 */
|
414 |
if (count) {
|
415 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
416 |
if (ret < 0) |
417 |
return ret;
|
418 |
memcpy(s->aligned_buf, buf, count); |
419 |
|
420 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
421 |
if (ret < 0) |
422 |
return ret;
|
423 |
if (count < ret)
|
424 |
ret = count; |
425 |
|
426 |
sum += ret; |
427 |
} |
428 |
return sum;
|
429 |
} |
430 |
} |
431 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
432 |
} |
433 |
|
434 |
#ifdef CONFIG_AIO
|
435 |
/***********************************************************/
|
436 |
/* Unix AIO using POSIX AIO */
|
437 |
|
438 |
typedef struct RawAIOCB { |
439 |
BlockDriverAIOCB common; |
440 |
struct qemu_paiocb aiocb;
|
441 |
struct RawAIOCB *next;
|
442 |
int ret;
|
443 |
} RawAIOCB; |
444 |
|
445 |
typedef struct PosixAioState |
446 |
{ |
447 |
int rfd, wfd;
|
448 |
RawAIOCB *first_aio; |
449 |
} PosixAioState; |
450 |
|
451 |
static void posix_aio_read(void *opaque) |
452 |
{ |
453 |
PosixAioState *s = opaque; |
454 |
RawAIOCB *acb, **pacb; |
455 |
int ret;
|
456 |
ssize_t len; |
457 |
|
458 |
/* read all bytes from signal pipe */
|
459 |
for (;;) {
|
460 |
char bytes[16]; |
461 |
|
462 |
len = read(s->rfd, bytes, sizeof(bytes));
|
463 |
if (len == -1 && errno == EINTR) |
464 |
continue; /* try again */ |
465 |
if (len == sizeof(bytes)) |
466 |
continue; /* more to read */ |
467 |
break;
|
468 |
} |
469 |
|
470 |
for(;;) {
|
471 |
pacb = &s->first_aio; |
472 |
for(;;) {
|
473 |
acb = *pacb; |
474 |
if (!acb)
|
475 |
goto the_end;
|
476 |
ret = qemu_paio_error(&acb->aiocb); |
477 |
if (ret == ECANCELED) {
|
478 |
/* remove the request */
|
479 |
*pacb = acb->next; |
480 |
qemu_aio_release(acb); |
481 |
} else if (ret != EINPROGRESS) { |
482 |
/* end of aio */
|
483 |
if (ret == 0) { |
484 |
ret = qemu_paio_return(&acb->aiocb); |
485 |
if (ret == acb->aiocb.aio_nbytes)
|
486 |
ret = 0;
|
487 |
else
|
488 |
ret = -EINVAL; |
489 |
} else {
|
490 |
ret = -ret; |
491 |
} |
492 |
/* remove the request */
|
493 |
*pacb = acb->next; |
494 |
/* call the callback */
|
495 |
acb->common.cb(acb->common.opaque, ret); |
496 |
qemu_aio_release(acb); |
497 |
break;
|
498 |
} else {
|
499 |
pacb = &acb->next; |
500 |
} |
501 |
} |
502 |
} |
503 |
the_end: ;
|
504 |
} |
505 |
|
506 |
static int posix_aio_flush(void *opaque) |
507 |
{ |
508 |
PosixAioState *s = opaque; |
509 |
return !!s->first_aio;
|
510 |
} |
511 |
|
512 |
static PosixAioState *posix_aio_state;
|
513 |
|
514 |
static void aio_signal_handler(int signum) |
515 |
{ |
516 |
if (posix_aio_state) {
|
517 |
char byte = 0; |
518 |
|
519 |
write(posix_aio_state->wfd, &byte, sizeof(byte));
|
520 |
} |
521 |
|
522 |
qemu_service_io(); |
523 |
} |
524 |
|
525 |
static int posix_aio_init(void) |
526 |
{ |
527 |
struct sigaction act;
|
528 |
PosixAioState *s; |
529 |
int fds[2]; |
530 |
struct qemu_paioinit ai;
|
531 |
|
532 |
if (posix_aio_state)
|
533 |
return 0; |
534 |
|
535 |
s = qemu_malloc(sizeof(PosixAioState));
|
536 |
if (s == NULL) |
537 |
return -ENOMEM;
|
538 |
|
539 |
sigfillset(&act.sa_mask); |
540 |
act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
541 |
act.sa_handler = aio_signal_handler; |
542 |
sigaction(SIGUSR2, &act, NULL);
|
543 |
|
544 |
s->first_aio = NULL;
|
545 |
if (pipe(fds) == -1) { |
546 |
fprintf(stderr, "failed to create pipe\n");
|
547 |
return -errno;
|
548 |
} |
549 |
|
550 |
s->rfd = fds[0];
|
551 |
s->wfd = fds[1];
|
552 |
|
553 |
fcntl(s->rfd, F_SETFL, O_NONBLOCK); |
554 |
fcntl(s->wfd, F_SETFL, O_NONBLOCK); |
555 |
|
556 |
qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
|
557 |
|
558 |
memset(&ai, 0, sizeof(ai)); |
559 |
ai.aio_threads = 64;
|
560 |
ai.aio_num = 64;
|
561 |
qemu_paio_init(&ai); |
562 |
|
563 |
posix_aio_state = s; |
564 |
|
565 |
return 0; |
566 |
} |
567 |
|
568 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
569 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
570 |
BlockDriverCompletionFunc *cb, void *opaque)
|
571 |
{ |
572 |
BDRVRawState *s = bs->opaque; |
573 |
RawAIOCB *acb; |
574 |
|
575 |
if (fd_open(bs) < 0) |
576 |
return NULL; |
577 |
|
578 |
acb = qemu_aio_get(bs, cb, opaque); |
579 |
if (!acb)
|
580 |
return NULL; |
581 |
acb->aiocb.aio_fildes = s->fd; |
582 |
acb->aiocb.aio_sigevent.sigev_signo = SIGUSR2; |
583 |
acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; |
584 |
acb->aiocb.aio_buf = buf; |
585 |
if (nb_sectors < 0) |
586 |
acb->aiocb.aio_nbytes = -nb_sectors; |
587 |
else
|
588 |
acb->aiocb.aio_nbytes = nb_sectors * 512;
|
589 |
acb->aiocb.aio_offset = sector_num * 512;
|
590 |
acb->next = posix_aio_state->first_aio; |
591 |
posix_aio_state->first_aio = acb; |
592 |
return acb;
|
593 |
} |
594 |
|
595 |
static void raw_aio_em_cb(void* opaque) |
596 |
{ |
597 |
RawAIOCB *acb = opaque; |
598 |
acb->common.cb(acb->common.opaque, acb->ret); |
599 |
qemu_aio_release(acb); |
600 |
} |
601 |
|
602 |
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
603 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
604 |
BlockDriverCompletionFunc *cb, void *opaque)
|
605 |
{ |
606 |
RawAIOCB *acb; |
607 |
|
608 |
/*
|
609 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
610 |
* to synchronous IO.
|
611 |
*/
|
612 |
BDRVRawState *s = bs->opaque; |
613 |
|
614 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
615 |
QEMUBH *bh; |
616 |
acb = qemu_aio_get(bs, cb, opaque); |
617 |
acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors); |
618 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
619 |
qemu_bh_schedule(bh); |
620 |
return &acb->common;
|
621 |
} |
622 |
|
623 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
624 |
if (!acb)
|
625 |
return NULL; |
626 |
if (qemu_paio_read(&acb->aiocb) < 0) { |
627 |
qemu_aio_release(acb); |
628 |
return NULL; |
629 |
} |
630 |
return &acb->common;
|
631 |
} |
632 |
|
633 |
static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
634 |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
635 |
BlockDriverCompletionFunc *cb, void *opaque)
|
636 |
{ |
637 |
RawAIOCB *acb; |
638 |
|
639 |
/*
|
640 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
641 |
* to synchronous IO.
|
642 |
*/
|
643 |
BDRVRawState *s = bs->opaque; |
644 |
|
645 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
646 |
QEMUBH *bh; |
647 |
acb = qemu_aio_get(bs, cb, opaque); |
648 |
acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors); |
649 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
650 |
qemu_bh_schedule(bh); |
651 |
return &acb->common;
|
652 |
} |
653 |
|
654 |
acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque); |
655 |
if (!acb)
|
656 |
return NULL; |
657 |
if (qemu_paio_write(&acb->aiocb) < 0) { |
658 |
qemu_aio_release(acb); |
659 |
return NULL; |
660 |
} |
661 |
return &acb->common;
|
662 |
} |
663 |
|
664 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
665 |
{ |
666 |
int ret;
|
667 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
668 |
RawAIOCB **pacb; |
669 |
|
670 |
ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
671 |
if (ret == QEMU_PAIO_NOTCANCELED) {
|
672 |
/* fail safe: if the aio could not be canceled, we wait for
|
673 |
it */
|
674 |
while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
|
675 |
} |
676 |
|
677 |
/* remove the callback from the queue */
|
678 |
pacb = &posix_aio_state->first_aio; |
679 |
for(;;) {
|
680 |
if (*pacb == NULL) { |
681 |
break;
|
682 |
} else if (*pacb == acb) { |
683 |
*pacb = acb->next; |
684 |
qemu_aio_release(acb); |
685 |
break;
|
686 |
} |
687 |
pacb = &acb->next; |
688 |
} |
689 |
} |
690 |
#else /* CONFIG_AIO */ |
691 |
static int posix_aio_init(void) |
692 |
{ |
693 |
return 0; |
694 |
} |
695 |
#endif /* CONFIG_AIO */ |
696 |
|
697 |
|
698 |
static void raw_close(BlockDriverState *bs) |
699 |
{ |
700 |
BDRVRawState *s = bs->opaque; |
701 |
if (s->fd >= 0) { |
702 |
close(s->fd); |
703 |
s->fd = -1;
|
704 |
if (s->aligned_buf != NULL) |
705 |
qemu_free(s->aligned_buf); |
706 |
} |
707 |
} |
708 |
|
709 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
710 |
{ |
711 |
BDRVRawState *s = bs->opaque; |
712 |
if (s->type != FTYPE_FILE)
|
713 |
return -ENOTSUP;
|
714 |
if (ftruncate(s->fd, offset) < 0) |
715 |
return -errno;
|
716 |
return 0; |
717 |
} |
718 |
|
719 |
#ifdef __OpenBSD__
|
720 |
static int64_t raw_getlength(BlockDriverState *bs)
|
721 |
{ |
722 |
BDRVRawState *s = bs->opaque; |
723 |
int fd = s->fd;
|
724 |
struct stat st;
|
725 |
|
726 |
if (fstat(fd, &st))
|
727 |
return -1; |
728 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
729 |
struct disklabel dl;
|
730 |
|
731 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
732 |
return -1; |
733 |
return (uint64_t)dl.d_secsize *
|
734 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
735 |
} else
|
736 |
return st.st_size;
|
737 |
} |
738 |
#else /* !__OpenBSD__ */ |
739 |
static int64_t raw_getlength(BlockDriverState *bs)
|
740 |
{ |
741 |
BDRVRawState *s = bs->opaque; |
742 |
int fd = s->fd;
|
743 |
int64_t size; |
744 |
#ifdef _BSD
|
745 |
struct stat sb;
|
746 |
#endif
|
747 |
#ifdef __sun__
|
748 |
struct dk_minfo minfo;
|
749 |
int rv;
|
750 |
#endif
|
751 |
int ret;
|
752 |
|
753 |
ret = fd_open(bs); |
754 |
if (ret < 0) |
755 |
return ret;
|
756 |
|
757 |
#ifdef _BSD
|
758 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
759 |
#ifdef DIOCGMEDIASIZE
|
760 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
761 |
#endif
|
762 |
#ifdef CONFIG_COCOA
|
763 |
size = LONG_LONG_MAX; |
764 |
#else
|
765 |
size = lseek(fd, 0LL, SEEK_END);
|
766 |
#endif
|
767 |
} else
|
768 |
#endif
|
769 |
#ifdef __sun__
|
770 |
/*
|
771 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
772 |
*/
|
773 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
774 |
if ( rv != -1 ) { |
775 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
776 |
} else /* there are reports that lseek on some devices |
777 |
fails, but irc discussion said that contingency
|
778 |
on contingency was overkill */
|
779 |
#endif
|
780 |
{ |
781 |
size = lseek(fd, 0, SEEK_END);
|
782 |
} |
783 |
return size;
|
784 |
} |
785 |
#endif
|
786 |
|
787 |
static int raw_create(const char *filename, int64_t total_size, |
788 |
const char *backing_file, int flags) |
789 |
{ |
790 |
int fd;
|
791 |
|
792 |
if (flags || backing_file)
|
793 |
return -ENOTSUP;
|
794 |
|
795 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
796 |
0644);
|
797 |
if (fd < 0) |
798 |
return -EIO;
|
799 |
ftruncate(fd, total_size * 512);
|
800 |
close(fd); |
801 |
return 0; |
802 |
} |
803 |
|
804 |
static void raw_flush(BlockDriverState *bs) |
805 |
{ |
806 |
BDRVRawState *s = bs->opaque; |
807 |
fsync(s->fd); |
808 |
} |
809 |
|
810 |
BlockDriver bdrv_raw = { |
811 |
"raw",
|
812 |
sizeof(BDRVRawState),
|
813 |
NULL, /* no probe for protocols */ |
814 |
raw_open, |
815 |
NULL,
|
816 |
NULL,
|
817 |
raw_close, |
818 |
raw_create, |
819 |
raw_flush, |
820 |
|
821 |
#ifdef CONFIG_AIO
|
822 |
.bdrv_aio_read = raw_aio_read, |
823 |
.bdrv_aio_write = raw_aio_write, |
824 |
.bdrv_aio_cancel = raw_aio_cancel, |
825 |
.aiocb_size = sizeof(RawAIOCB),
|
826 |
#endif
|
827 |
|
828 |
.bdrv_pread = raw_pread, |
829 |
.bdrv_pwrite = raw_pwrite, |
830 |
.bdrv_truncate = raw_truncate, |
831 |
.bdrv_getlength = raw_getlength, |
832 |
}; |
833 |
|
834 |
/***********************************************/
|
835 |
/* host device */
|
836 |
|
837 |
#ifdef CONFIG_COCOA
|
838 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
839 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
840 |
|
841 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
842 |
{ |
843 |
kern_return_t kernResult; |
844 |
mach_port_t masterPort; |
845 |
CFMutableDictionaryRef classesToMatch; |
846 |
|
847 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
848 |
if ( KERN_SUCCESS != kernResult ) {
|
849 |
printf( "IOMasterPort returned %d\n", kernResult );
|
850 |
} |
851 |
|
852 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
853 |
if ( classesToMatch == NULL ) { |
854 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
855 |
} else {
|
856 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
857 |
} |
858 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
859 |
if ( KERN_SUCCESS != kernResult )
|
860 |
{ |
861 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
862 |
} |
863 |
|
864 |
return kernResult;
|
865 |
} |
866 |
|
867 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
868 |
{ |
869 |
io_object_t nextMedia; |
870 |
kern_return_t kernResult = KERN_FAILURE; |
871 |
*bsdPath = '\0';
|
872 |
nextMedia = IOIteratorNext( mediaIterator ); |
873 |
if ( nextMedia )
|
874 |
{ |
875 |
CFTypeRef bsdPathAsCFString; |
876 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
877 |
if ( bsdPathAsCFString ) {
|
878 |
size_t devPathLength; |
879 |
strcpy( bsdPath, _PATH_DEV ); |
880 |
strcat( bsdPath, "r" );
|
881 |
devPathLength = strlen( bsdPath ); |
882 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
883 |
kernResult = KERN_SUCCESS; |
884 |
} |
885 |
CFRelease( bsdPathAsCFString ); |
886 |
} |
887 |
IOObjectRelease( nextMedia ); |
888 |
} |
889 |
|
890 |
return kernResult;
|
891 |
} |
892 |
|
893 |
#endif
|
894 |
|
895 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
896 |
{ |
897 |
BDRVRawState *s = bs->opaque; |
898 |
int fd, open_flags, ret;
|
899 |
|
900 |
posix_aio_init(); |
901 |
|
902 |
#ifdef CONFIG_COCOA
|
903 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
904 |
kern_return_t kernResult; |
905 |
io_iterator_t mediaIterator; |
906 |
char bsdPath[ MAXPATHLEN ];
|
907 |
int fd;
|
908 |
|
909 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
910 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
911 |
|
912 |
if ( bsdPath[ 0 ] != '\0' ) { |
913 |
strcat(bsdPath,"s0");
|
914 |
/* some CDs don't have a partition 0 */
|
915 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
916 |
if (fd < 0) { |
917 |
bsdPath[strlen(bsdPath)-1] = '1'; |
918 |
} else {
|
919 |
close(fd); |
920 |
} |
921 |
filename = bsdPath; |
922 |
} |
923 |
|
924 |
if ( mediaIterator )
|
925 |
IOObjectRelease( mediaIterator ); |
926 |
} |
927 |
#endif
|
928 |
open_flags = O_BINARY; |
929 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
930 |
open_flags |= O_RDWR; |
931 |
} else {
|
932 |
open_flags |= O_RDONLY; |
933 |
bs->read_only = 1;
|
934 |
} |
935 |
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
|
936 |
* and O_DIRECT for no caching. */
|
937 |
if ((flags & BDRV_O_NOCACHE))
|
938 |
open_flags |= O_DIRECT; |
939 |
else if (!(flags & BDRV_O_CACHE_WB)) |
940 |
open_flags |= O_DSYNC; |
941 |
|
942 |
s->type = FTYPE_FILE; |
943 |
#if defined(__linux__)
|
944 |
if (strstart(filename, "/dev/cd", NULL)) { |
945 |
/* open will not fail even if no CD is inserted */
|
946 |
open_flags |= O_NONBLOCK; |
947 |
s->type = FTYPE_CD; |
948 |
} else if (strstart(filename, "/dev/fd", NULL)) { |
949 |
s->type = FTYPE_FD; |
950 |
s->fd_open_flags = open_flags; |
951 |
/* open will not fail even if no floppy is inserted */
|
952 |
open_flags |= O_NONBLOCK; |
953 |
} else if (strstart(filename, "/dev/sg", NULL)) { |
954 |
bs->sg = 1;
|
955 |
} |
956 |
#endif
|
957 |
fd = open(filename, open_flags, 0644);
|
958 |
if (fd < 0) { |
959 |
ret = -errno; |
960 |
if (ret == -EROFS)
|
961 |
ret = -EACCES; |
962 |
return ret;
|
963 |
} |
964 |
s->fd = fd; |
965 |
#if defined(__linux__)
|
966 |
/* close fd so that we can reopen it as needed */
|
967 |
if (s->type == FTYPE_FD) {
|
968 |
close(s->fd); |
969 |
s->fd = -1;
|
970 |
s->fd_media_changed = 1;
|
971 |
} |
972 |
#endif
|
973 |
return 0; |
974 |
} |
975 |
|
976 |
#if defined(__linux__)
|
977 |
/* Note: we do not have a reliable method to detect if the floppy is
|
978 |
present. The current method is to try to open the floppy at every
|
979 |
I/O and to keep it opened during a few hundreds of ms. */
|
980 |
static int fd_open(BlockDriverState *bs) |
981 |
{ |
982 |
BDRVRawState *s = bs->opaque; |
983 |
int last_media_present;
|
984 |
|
985 |
if (s->type != FTYPE_FD)
|
986 |
return 0; |
987 |
last_media_present = (s->fd >= 0);
|
988 |
if (s->fd >= 0 && |
989 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
990 |
close(s->fd); |
991 |
s->fd = -1;
|
992 |
#ifdef DEBUG_FLOPPY
|
993 |
printf("Floppy closed\n");
|
994 |
#endif
|
995 |
} |
996 |
if (s->fd < 0) { |
997 |
if (s->fd_got_error &&
|
998 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
999 |
#ifdef DEBUG_FLOPPY
|
1000 |
printf("No floppy (open delayed)\n");
|
1001 |
#endif
|
1002 |
return -EIO;
|
1003 |
} |
1004 |
s->fd = open(bs->filename, s->fd_open_flags); |
1005 |
if (s->fd < 0) { |
1006 |
s->fd_error_time = qemu_get_clock(rt_clock); |
1007 |
s->fd_got_error = 1;
|
1008 |
if (last_media_present)
|
1009 |
s->fd_media_changed = 1;
|
1010 |
#ifdef DEBUG_FLOPPY
|
1011 |
printf("No floppy\n");
|
1012 |
#endif
|
1013 |
return -EIO;
|
1014 |
} |
1015 |
#ifdef DEBUG_FLOPPY
|
1016 |
printf("Floppy opened\n");
|
1017 |
#endif
|
1018 |
} |
1019 |
if (!last_media_present)
|
1020 |
s->fd_media_changed = 1;
|
1021 |
s->fd_open_time = qemu_get_clock(rt_clock); |
1022 |
s->fd_got_error = 0;
|
1023 |
return 0; |
1024 |
} |
1025 |
|
1026 |
static int raw_is_inserted(BlockDriverState *bs) |
1027 |
{ |
1028 |
BDRVRawState *s = bs->opaque; |
1029 |
int ret;
|
1030 |
|
1031 |
switch(s->type) {
|
1032 |
case FTYPE_CD:
|
1033 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1034 |
if (ret == CDS_DISC_OK)
|
1035 |
return 1; |
1036 |
else
|
1037 |
return 0; |
1038 |
break;
|
1039 |
case FTYPE_FD:
|
1040 |
ret = fd_open(bs); |
1041 |
return (ret >= 0); |
1042 |
default:
|
1043 |
return 1; |
1044 |
} |
1045 |
} |
1046 |
|
1047 |
/* currently only used by fdc.c, but a CD version would be good too */
|
1048 |
static int raw_media_changed(BlockDriverState *bs) |
1049 |
{ |
1050 |
BDRVRawState *s = bs->opaque; |
1051 |
|
1052 |
switch(s->type) {
|
1053 |
case FTYPE_FD:
|
1054 |
{ |
1055 |
int ret;
|
1056 |
/* XXX: we do not have a true media changed indication. It
|
1057 |
does not work if the floppy is changed without trying
|
1058 |
to read it */
|
1059 |
fd_open(bs); |
1060 |
ret = s->fd_media_changed; |
1061 |
s->fd_media_changed = 0;
|
1062 |
#ifdef DEBUG_FLOPPY
|
1063 |
printf("Floppy changed=%d\n", ret);
|
1064 |
#endif
|
1065 |
return ret;
|
1066 |
} |
1067 |
default:
|
1068 |
return -ENOTSUP;
|
1069 |
} |
1070 |
} |
1071 |
|
1072 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1073 |
{ |
1074 |
BDRVRawState *s = bs->opaque; |
1075 |
|
1076 |
switch(s->type) {
|
1077 |
case FTYPE_CD:
|
1078 |
if (eject_flag) {
|
1079 |
if (ioctl (s->fd, CDROMEJECT, NULL) < 0) |
1080 |
perror("CDROMEJECT");
|
1081 |
} else {
|
1082 |
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0) |
1083 |
perror("CDROMEJECT");
|
1084 |
} |
1085 |
break;
|
1086 |
case FTYPE_FD:
|
1087 |
{ |
1088 |
int fd;
|
1089 |
if (s->fd >= 0) { |
1090 |
close(s->fd); |
1091 |
s->fd = -1;
|
1092 |
} |
1093 |
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK); |
1094 |
if (fd >= 0) { |
1095 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1096 |
perror("FDEJECT");
|
1097 |
close(fd); |
1098 |
} |
1099 |
} |
1100 |
break;
|
1101 |
default:
|
1102 |
return -ENOTSUP;
|
1103 |
} |
1104 |
return 0; |
1105 |
} |
1106 |
|
1107 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1108 |
{ |
1109 |
BDRVRawState *s = bs->opaque; |
1110 |
|
1111 |
switch(s->type) {
|
1112 |
case FTYPE_CD:
|
1113 |
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1114 |
/* Note: an error can happen if the distribution automatically
|
1115 |
mounts the CD-ROM */
|
1116 |
// perror("CDROM_LOCKDOOR");
|
1117 |
} |
1118 |
break;
|
1119 |
default:
|
1120 |
return -ENOTSUP;
|
1121 |
} |
1122 |
return 0; |
1123 |
} |
1124 |
|
1125 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1126 |
{ |
1127 |
BDRVRawState *s = bs->opaque; |
1128 |
|
1129 |
return ioctl(s->fd, req, buf);
|
1130 |
} |
1131 |
#else
|
1132 |
|
1133 |
static int fd_open(BlockDriverState *bs) |
1134 |
{ |
1135 |
return 0; |
1136 |
} |
1137 |
|
1138 |
static int raw_is_inserted(BlockDriverState *bs) |
1139 |
{ |
1140 |
return 1; |
1141 |
} |
1142 |
|
1143 |
static int raw_media_changed(BlockDriverState *bs) |
1144 |
{ |
1145 |
return -ENOTSUP;
|
1146 |
} |
1147 |
|
1148 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1149 |
{ |
1150 |
return -ENOTSUP;
|
1151 |
} |
1152 |
|
1153 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1154 |
{ |
1155 |
return -ENOTSUP;
|
1156 |
} |
1157 |
|
1158 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1159 |
{ |
1160 |
return -ENOTSUP;
|
1161 |
} |
1162 |
#endif /* !linux */ |
1163 |
|
1164 |
BlockDriver bdrv_host_device = { |
1165 |
"host_device",
|
1166 |
sizeof(BDRVRawState),
|
1167 |
NULL, /* no probe for protocols */ |
1168 |
hdev_open, |
1169 |
NULL,
|
1170 |
NULL,
|
1171 |
raw_close, |
1172 |
NULL,
|
1173 |
raw_flush, |
1174 |
|
1175 |
#ifdef CONFIG_AIO
|
1176 |
.bdrv_aio_read = raw_aio_read, |
1177 |
.bdrv_aio_write = raw_aio_write, |
1178 |
.bdrv_aio_cancel = raw_aio_cancel, |
1179 |
.aiocb_size = sizeof(RawAIOCB),
|
1180 |
#endif
|
1181 |
|
1182 |
.bdrv_pread = raw_pread, |
1183 |
.bdrv_pwrite = raw_pwrite, |
1184 |
.bdrv_getlength = raw_getlength, |
1185 |
|
1186 |
/* removable device support */
|
1187 |
.bdrv_is_inserted = raw_is_inserted, |
1188 |
.bdrv_media_changed = raw_media_changed, |
1189 |
.bdrv_eject = raw_eject, |
1190 |
.bdrv_set_locked = raw_set_locked, |
1191 |
/* generic scsi device */
|
1192 |
.bdrv_ioctl = raw_ioctl, |
1193 |
}; |