root / block-raw-posix.c @ 9f7965c7
History | View | Annotate | Download (32.4 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 <aio.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 |
/* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
|
77 |
#ifndef O_DIRECT
|
78 |
#define O_DIRECT O_DSYNC
|
79 |
#endif
|
80 |
|
81 |
#define FTYPE_FILE 0 |
82 |
#define FTYPE_CD 1 |
83 |
#define FTYPE_FD 2 |
84 |
|
85 |
#define ALIGNED_BUFFER_SIZE (32 * 512) |
86 |
|
87 |
/* if the FD is not accessed during that time (in ms), we try to
|
88 |
reopen it to see if the disk has been changed */
|
89 |
#define FD_OPEN_TIMEOUT 1000 |
90 |
|
91 |
/* posix-aio doesn't allow multiple outstanding requests to a single file
|
92 |
* descriptor. we implement a pool of dup()'d file descriptors to work
|
93 |
* around this */
|
94 |
#define RAW_FD_POOL_SIZE 64 |
95 |
|
96 |
typedef struct BDRVRawState { |
97 |
int fd;
|
98 |
int type;
|
99 |
unsigned int lseek_err_cnt; |
100 |
int fd_pool[RAW_FD_POOL_SIZE];
|
101 |
#if defined(__linux__)
|
102 |
/* linux floppy specific */
|
103 |
int fd_open_flags;
|
104 |
int64_t fd_open_time; |
105 |
int64_t fd_error_time; |
106 |
int fd_got_error;
|
107 |
int fd_media_changed;
|
108 |
#endif
|
109 |
uint8_t* aligned_buf; |
110 |
} BDRVRawState; |
111 |
|
112 |
static int posix_aio_init(void); |
113 |
|
114 |
static int fd_open(BlockDriverState *bs); |
115 |
|
116 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
117 |
{ |
118 |
BDRVRawState *s = bs->opaque; |
119 |
int fd, open_flags, ret;
|
120 |
int i;
|
121 |
|
122 |
posix_aio_init(); |
123 |
|
124 |
s->lseek_err_cnt = 0;
|
125 |
|
126 |
open_flags = O_BINARY; |
127 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
128 |
open_flags |= O_RDWR; |
129 |
} else {
|
130 |
open_flags |= O_RDONLY; |
131 |
bs->read_only = 1;
|
132 |
} |
133 |
if (flags & BDRV_O_CREAT)
|
134 |
open_flags |= O_CREAT | O_TRUNC; |
135 |
|
136 |
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
|
137 |
* and O_DIRECT for no caching. */
|
138 |
if ((flags & BDRV_O_NOCACHE))
|
139 |
open_flags |= O_DIRECT; |
140 |
else if (!(flags & BDRV_O_CACHE_WB)) |
141 |
open_flags |= O_DSYNC; |
142 |
|
143 |
s->type = FTYPE_FILE; |
144 |
|
145 |
fd = open(filename, open_flags, 0644);
|
146 |
if (fd < 0) { |
147 |
ret = -errno; |
148 |
if (ret == -EROFS)
|
149 |
ret = -EACCES; |
150 |
return ret;
|
151 |
} |
152 |
s->fd = fd; |
153 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) |
154 |
s->fd_pool[i] = -1;
|
155 |
s->aligned_buf = NULL;
|
156 |
if ((flags & BDRV_O_NOCACHE)) {
|
157 |
s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
|
158 |
if (s->aligned_buf == NULL) { |
159 |
ret = -errno; |
160 |
close(fd); |
161 |
return ret;
|
162 |
} |
163 |
} |
164 |
return 0; |
165 |
} |
166 |
|
167 |
/* XXX: use host sector size if necessary with:
|
168 |
#ifdef DIOCGSECTORSIZE
|
169 |
{
|
170 |
unsigned int sectorsize = 512;
|
171 |
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
|
172 |
sectorsize > bufsize)
|
173 |
bufsize = sectorsize;
|
174 |
}
|
175 |
#endif
|
176 |
#ifdef CONFIG_COCOA
|
177 |
u_int32_t blockSize = 512;
|
178 |
if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
|
179 |
bufsize = blockSize;
|
180 |
}
|
181 |
#endif
|
182 |
*/
|
183 |
|
184 |
/*
|
185 |
* offset and count are in bytes, but must be multiples of 512 for files
|
186 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
|
187 |
*
|
188 |
* This function may be called without alignment if the caller ensures
|
189 |
* that O_DIRECT is not in effect.
|
190 |
*/
|
191 |
static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, |
192 |
uint8_t *buf, int count)
|
193 |
{ |
194 |
BDRVRawState *s = bs->opaque; |
195 |
int ret;
|
196 |
|
197 |
ret = fd_open(bs); |
198 |
if (ret < 0) |
199 |
return ret;
|
200 |
|
201 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
202 |
++(s->lseek_err_cnt); |
203 |
if(s->lseek_err_cnt <= 10) { |
204 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
205 |
"] lseek failed : %d = %s\n",
|
206 |
s->fd, bs->filename, offset, buf, count, |
207 |
bs->total_sectors, errno, strerror(errno)); |
208 |
} |
209 |
return -1; |
210 |
} |
211 |
s->lseek_err_cnt=0;
|
212 |
|
213 |
ret = read(s->fd, buf, count); |
214 |
if (ret == count)
|
215 |
goto label__raw_read__success;
|
216 |
|
217 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
218 |
"] read failed %d : %d = %s\n",
|
219 |
s->fd, bs->filename, offset, buf, count, |
220 |
bs->total_sectors, ret, errno, strerror(errno)); |
221 |
|
222 |
/* Try harder for CDrom. */
|
223 |
if (bs->type == BDRV_TYPE_CDROM) {
|
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 |
lseek(s->fd, offset, SEEK_SET); |
229 |
ret = read(s->fd, buf, count); |
230 |
if (ret == count)
|
231 |
goto label__raw_read__success;
|
232 |
|
233 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
234 |
"] retry read failed %d : %d = %s\n",
|
235 |
s->fd, bs->filename, offset, buf, count, |
236 |
bs->total_sectors, ret, errno, strerror(errno)); |
237 |
} |
238 |
|
239 |
label__raw_read__success:
|
240 |
|
241 |
return ret;
|
242 |
} |
243 |
|
244 |
/*
|
245 |
* offset and count are in bytes, but must be multiples of 512 for files
|
246 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
|
247 |
*
|
248 |
* This function may be called without alignment if the caller ensures
|
249 |
* that O_DIRECT is not in effect.
|
250 |
*/
|
251 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
252 |
const uint8_t *buf, int count) |
253 |
{ |
254 |
BDRVRawState *s = bs->opaque; |
255 |
int ret;
|
256 |
|
257 |
ret = fd_open(bs); |
258 |
if (ret < 0) |
259 |
return ret;
|
260 |
|
261 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
262 |
++(s->lseek_err_cnt); |
263 |
if(s->lseek_err_cnt) {
|
264 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
265 |
PRId64 "] lseek failed : %d = %s\n",
|
266 |
s->fd, bs->filename, offset, buf, count, |
267 |
bs->total_sectors, errno, strerror(errno)); |
268 |
} |
269 |
return -1; |
270 |
} |
271 |
s->lseek_err_cnt = 0;
|
272 |
|
273 |
ret = write(s->fd, buf, count); |
274 |
if (ret == count)
|
275 |
goto label__raw_write__success;
|
276 |
|
277 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
278 |
"] write failed %d : %d = %s\n",
|
279 |
s->fd, bs->filename, offset, buf, count, |
280 |
bs->total_sectors, ret, errno, strerror(errno)); |
281 |
|
282 |
label__raw_write__success:
|
283 |
|
284 |
return ret;
|
285 |
} |
286 |
|
287 |
|
288 |
/*
|
289 |
* offset and count are in bytes and possibly not aligned. For files opened
|
290 |
* with O_DIRECT, necessary alignments are ensured before calling
|
291 |
* raw_pread_aligned to do the actual read.
|
292 |
*/
|
293 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
294 |
uint8_t *buf, int count)
|
295 |
{ |
296 |
BDRVRawState *s = bs->opaque; |
297 |
int size, ret, shift, sum;
|
298 |
|
299 |
sum = 0;
|
300 |
|
301 |
if (s->aligned_buf != NULL) { |
302 |
|
303 |
if (offset & 0x1ff) { |
304 |
/* align offset on a 512 bytes boundary */
|
305 |
|
306 |
shift = offset & 0x1ff;
|
307 |
size = (shift + count + 0x1ff) & ~0x1ff; |
308 |
if (size > ALIGNED_BUFFER_SIZE)
|
309 |
size = ALIGNED_BUFFER_SIZE; |
310 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
311 |
if (ret < 0) |
312 |
return ret;
|
313 |
|
314 |
size = 512 - shift;
|
315 |
if (size > count)
|
316 |
size = count; |
317 |
memcpy(buf, s->aligned_buf + shift, size); |
318 |
|
319 |
buf += size; |
320 |
offset += size; |
321 |
count -= size; |
322 |
sum += size; |
323 |
|
324 |
if (count == 0) |
325 |
return sum;
|
326 |
} |
327 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
328 |
|
329 |
/* read on aligned buffer */
|
330 |
|
331 |
while (count) {
|
332 |
|
333 |
size = (count + 0x1ff) & ~0x1ff; |
334 |
if (size > ALIGNED_BUFFER_SIZE)
|
335 |
size = ALIGNED_BUFFER_SIZE; |
336 |
|
337 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
338 |
if (ret < 0) |
339 |
return ret;
|
340 |
|
341 |
size = ret; |
342 |
if (size > count)
|
343 |
size = count; |
344 |
|
345 |
memcpy(buf, s->aligned_buf, size); |
346 |
|
347 |
buf += size; |
348 |
offset += size; |
349 |
count -= size; |
350 |
sum += size; |
351 |
} |
352 |
|
353 |
return sum;
|
354 |
} |
355 |
} |
356 |
|
357 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
358 |
} |
359 |
|
360 |
/*
|
361 |
* offset and count are in bytes and possibly not aligned. For files opened
|
362 |
* with O_DIRECT, necessary alignments are ensured before calling
|
363 |
* raw_pwrite_aligned to do the actual write.
|
364 |
*/
|
365 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
366 |
const uint8_t *buf, int count) |
367 |
{ |
368 |
BDRVRawState *s = bs->opaque; |
369 |
int size, ret, shift, sum;
|
370 |
|
371 |
sum = 0;
|
372 |
|
373 |
if (s->aligned_buf != NULL) { |
374 |
|
375 |
if (offset & 0x1ff) { |
376 |
/* align offset on a 512 bytes boundary */
|
377 |
shift = offset & 0x1ff;
|
378 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
379 |
if (ret < 0) |
380 |
return ret;
|
381 |
|
382 |
size = 512 - shift;
|
383 |
if (size > count)
|
384 |
size = count; |
385 |
memcpy(s->aligned_buf + shift, buf, size); |
386 |
|
387 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
388 |
if (ret < 0) |
389 |
return ret;
|
390 |
|
391 |
buf += size; |
392 |
offset += size; |
393 |
count -= size; |
394 |
sum += size; |
395 |
|
396 |
if (count == 0) |
397 |
return sum;
|
398 |
} |
399 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
400 |
|
401 |
while ((size = (count & ~0x1ff)) != 0) { |
402 |
|
403 |
if (size > ALIGNED_BUFFER_SIZE)
|
404 |
size = ALIGNED_BUFFER_SIZE; |
405 |
|
406 |
memcpy(s->aligned_buf, buf, size); |
407 |
|
408 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
409 |
if (ret < 0) |
410 |
return ret;
|
411 |
|
412 |
buf += ret; |
413 |
offset += ret; |
414 |
count -= ret; |
415 |
sum += ret; |
416 |
} |
417 |
/* here, count < 512 because (count & ~0x1ff) == 0 */
|
418 |
if (count) {
|
419 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
420 |
if (ret < 0) |
421 |
return ret;
|
422 |
memcpy(s->aligned_buf, buf, count); |
423 |
|
424 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
425 |
if (ret < 0) |
426 |
return ret;
|
427 |
if (count < ret)
|
428 |
ret = count; |
429 |
|
430 |
sum += ret; |
431 |
} |
432 |
return sum;
|
433 |
} |
434 |
} |
435 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
436 |
} |
437 |
|
438 |
#ifdef CONFIG_AIO
|
439 |
/***********************************************************/
|
440 |
/* Unix AIO using POSIX AIO */
|
441 |
|
442 |
typedef struct RawAIOCB { |
443 |
BlockDriverAIOCB common; |
444 |
int fd;
|
445 |
struct aiocb aiocb;
|
446 |
struct RawAIOCB *next;
|
447 |
int ret;
|
448 |
} RawAIOCB; |
449 |
|
450 |
typedef struct PosixAioState |
451 |
{ |
452 |
int rfd, wfd;
|
453 |
RawAIOCB *first_aio; |
454 |
} PosixAioState; |
455 |
|
456 |
static int raw_fd_pool_get(BDRVRawState *s) |
457 |
{ |
458 |
int i;
|
459 |
|
460 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
461 |
/* already in use */
|
462 |
if (s->fd_pool[i] != -1) |
463 |
continue;
|
464 |
|
465 |
/* try to dup file descriptor */
|
466 |
s->fd_pool[i] = dup(s->fd); |
467 |
if (s->fd_pool[i] != -1) |
468 |
return s->fd_pool[i];
|
469 |
} |
470 |
|
471 |
/* we couldn't dup the file descriptor so just use the main one */
|
472 |
return s->fd;
|
473 |
} |
474 |
|
475 |
static void raw_fd_pool_put(RawAIOCB *acb) |
476 |
{ |
477 |
BDRVRawState *s = acb->common.bs->opaque; |
478 |
int i;
|
479 |
|
480 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
481 |
if (s->fd_pool[i] == acb->fd) {
|
482 |
close(s->fd_pool[i]); |
483 |
s->fd_pool[i] = -1;
|
484 |
} |
485 |
} |
486 |
} |
487 |
|
488 |
static void posix_aio_read(void *opaque) |
489 |
{ |
490 |
PosixAioState *s = opaque; |
491 |
RawAIOCB *acb, **pacb; |
492 |
int ret;
|
493 |
ssize_t len; |
494 |
|
495 |
do {
|
496 |
char byte;
|
497 |
|
498 |
len = read(s->rfd, &byte, 1);
|
499 |
if (len == -1 && errno == EINTR) |
500 |
continue;
|
501 |
if (len == -1 && errno == EAGAIN) |
502 |
break;
|
503 |
} while (len == -1); |
504 |
|
505 |
for(;;) {
|
506 |
pacb = &s->first_aio; |
507 |
for(;;) {
|
508 |
acb = *pacb; |
509 |
if (!acb)
|
510 |
goto the_end;
|
511 |
ret = aio_error(&acb->aiocb); |
512 |
if (ret == ECANCELED) {
|
513 |
/* remove the request */
|
514 |
*pacb = acb->next; |
515 |
raw_fd_pool_put(acb); |
516 |
qemu_aio_release(acb); |
517 |
} else if (ret != EINPROGRESS) { |
518 |
/* end of aio */
|
519 |
if (ret == 0) { |
520 |
ret = aio_return(&acb->aiocb); |
521 |
if (ret == acb->aiocb.aio_nbytes)
|
522 |
ret = 0;
|
523 |
else
|
524 |
ret = -EINVAL; |
525 |
} else {
|
526 |
ret = -ret; |
527 |
} |
528 |
/* remove the request */
|
529 |
*pacb = acb->next; |
530 |
/* call the callback */
|
531 |
acb->common.cb(acb->common.opaque, ret); |
532 |
raw_fd_pool_put(acb); |
533 |
qemu_aio_release(acb); |
534 |
break;
|
535 |
} else {
|
536 |
pacb = &acb->next; |
537 |
} |
538 |
} |
539 |
} |
540 |
the_end: ;
|
541 |
} |
542 |
|
543 |
static int posix_aio_flush(void *opaque) |
544 |
{ |
545 |
PosixAioState *s = opaque; |
546 |
return !!s->first_aio;
|
547 |
} |
548 |
|
549 |
static PosixAioState *posix_aio_state;
|
550 |
|
551 |
static void aio_signal_handler(int signum) |
552 |
{ |
553 |
if (posix_aio_state) {
|
554 |
char byte = 0; |
555 |
|
556 |
write(posix_aio_state->wfd, &byte, sizeof(byte));
|
557 |
} |
558 |
|
559 |
qemu_service_io(); |
560 |
} |
561 |
|
562 |
static int posix_aio_init(void) |
563 |
{ |
564 |
struct sigaction act;
|
565 |
PosixAioState *s; |
566 |
int fds[2]; |
567 |
|
568 |
if (posix_aio_state)
|
569 |
return 0; |
570 |
|
571 |
s = qemu_malloc(sizeof(PosixAioState));
|
572 |
if (s == NULL) |
573 |
return -ENOMEM;
|
574 |
|
575 |
sigfillset(&act.sa_mask); |
576 |
act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
577 |
act.sa_handler = aio_signal_handler; |
578 |
sigaction(SIGUSR2, &act, NULL);
|
579 |
|
580 |
s->first_aio = NULL;
|
581 |
if (pipe(fds) == -1) { |
582 |
fprintf(stderr, "failed to create pipe\n");
|
583 |
return -errno;
|
584 |
} |
585 |
|
586 |
s->rfd = fds[0];
|
587 |
s->wfd = fds[1];
|
588 |
|
589 |
fcntl(s->wfd, F_SETFL, O_NONBLOCK); |
590 |
|
591 |
qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
|
592 |
|
593 |
#if defined(__linux__)
|
594 |
{ |
595 |
struct aioinit ai;
|
596 |
|
597 |
memset(&ai, 0, sizeof(ai)); |
598 |
#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 4) |
599 |
ai.aio_threads = 64;
|
600 |
ai.aio_num = 64;
|
601 |
#else
|
602 |
/* XXX: aio thread exit seems to hang on RedHat 9 and this init
|
603 |
seems to fix the problem. */
|
604 |
ai.aio_threads = 1;
|
605 |
ai.aio_num = 1;
|
606 |
ai.aio_idle_time = 365 * 100000; |
607 |
#endif
|
608 |
aio_init(&ai); |
609 |
} |
610 |
#endif
|
611 |
posix_aio_state = s; |
612 |
|
613 |
return 0; |
614 |
} |
615 |
|
616 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
617 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
618 |
BlockDriverCompletionFunc *cb, void *opaque)
|
619 |
{ |
620 |
BDRVRawState *s = bs->opaque; |
621 |
RawAIOCB *acb; |
622 |
|
623 |
if (fd_open(bs) < 0) |
624 |
return NULL; |
625 |
|
626 |
acb = qemu_aio_get(bs, cb, opaque); |
627 |
if (!acb)
|
628 |
return NULL; |
629 |
acb->fd = raw_fd_pool_get(s); |
630 |
acb->aiocb.aio_fildes = acb->fd; |
631 |
acb->aiocb.aio_sigevent.sigev_signo = SIGUSR2; |
632 |
acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; |
633 |
acb->aiocb.aio_buf = buf; |
634 |
if (nb_sectors < 0) |
635 |
acb->aiocb.aio_nbytes = -nb_sectors; |
636 |
else
|
637 |
acb->aiocb.aio_nbytes = nb_sectors * 512;
|
638 |
acb->aiocb.aio_offset = sector_num * 512;
|
639 |
acb->next = posix_aio_state->first_aio; |
640 |
posix_aio_state->first_aio = acb; |
641 |
return acb;
|
642 |
} |
643 |
|
644 |
static void raw_aio_em_cb(void* opaque) |
645 |
{ |
646 |
RawAIOCB *acb = opaque; |
647 |
acb->common.cb(acb->common.opaque, acb->ret); |
648 |
qemu_aio_release(acb); |
649 |
} |
650 |
|
651 |
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
652 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
653 |
BlockDriverCompletionFunc *cb, void *opaque)
|
654 |
{ |
655 |
RawAIOCB *acb; |
656 |
|
657 |
/*
|
658 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
659 |
* to synchronous IO.
|
660 |
*/
|
661 |
BDRVRawState *s = bs->opaque; |
662 |
|
663 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
664 |
QEMUBH *bh; |
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); |
669 |
return &acb->common;
|
670 |
} |
671 |
|
672 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
673 |
if (!acb)
|
674 |
return NULL; |
675 |
if (aio_read(&acb->aiocb) < 0) { |
676 |
qemu_aio_release(acb); |
677 |
return NULL; |
678 |
} |
679 |
return &acb->common;
|
680 |
} |
681 |
|
682 |
static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
683 |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
684 |
BlockDriverCompletionFunc *cb, void *opaque)
|
685 |
{ |
686 |
RawAIOCB *acb; |
687 |
|
688 |
/*
|
689 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
690 |
* to synchronous IO.
|
691 |
*/
|
692 |
BDRVRawState *s = bs->opaque; |
693 |
|
694 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
695 |
QEMUBH *bh; |
696 |
acb = qemu_aio_get(bs, cb, opaque); |
697 |
acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors); |
698 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
699 |
qemu_bh_schedule(bh); |
700 |
return &acb->common;
|
701 |
} |
702 |
|
703 |
acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque); |
704 |
if (!acb)
|
705 |
return NULL; |
706 |
if (aio_write(&acb->aiocb) < 0) { |
707 |
qemu_aio_release(acb); |
708 |
return NULL; |
709 |
} |
710 |
return &acb->common;
|
711 |
} |
712 |
|
713 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
714 |
{ |
715 |
int ret;
|
716 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
717 |
RawAIOCB **pacb; |
718 |
|
719 |
ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
720 |
if (ret == AIO_NOTCANCELED) {
|
721 |
/* fail safe: if the aio could not be canceled, we wait for
|
722 |
it */
|
723 |
while (aio_error(&acb->aiocb) == EINPROGRESS);
|
724 |
} |
725 |
|
726 |
/* remove the callback from the queue */
|
727 |
pacb = &posix_aio_state->first_aio; |
728 |
for(;;) {
|
729 |
if (*pacb == NULL) { |
730 |
break;
|
731 |
} else if (*pacb == acb) { |
732 |
*pacb = acb->next; |
733 |
raw_fd_pool_put(acb); |
734 |
qemu_aio_release(acb); |
735 |
break;
|
736 |
} |
737 |
pacb = &acb->next; |
738 |
} |
739 |
} |
740 |
|
741 |
#else /* CONFIG_AIO */ |
742 |
static int posix_aio_init(void) |
743 |
{ |
744 |
return 0; |
745 |
} |
746 |
#endif /* CONFIG_AIO */ |
747 |
|
748 |
static void raw_close_fd_pool(BDRVRawState *s) |
749 |
{ |
750 |
int i;
|
751 |
|
752 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
753 |
if (s->fd_pool[i] != -1) { |
754 |
close(s->fd_pool[i]); |
755 |
s->fd_pool[i] = -1;
|
756 |
} |
757 |
} |
758 |
} |
759 |
|
760 |
static void raw_close(BlockDriverState *bs) |
761 |
{ |
762 |
BDRVRawState *s = bs->opaque; |
763 |
if (s->fd >= 0) { |
764 |
close(s->fd); |
765 |
s->fd = -1;
|
766 |
if (s->aligned_buf != NULL) |
767 |
qemu_free(s->aligned_buf); |
768 |
} |
769 |
raw_close_fd_pool(s); |
770 |
} |
771 |
|
772 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
773 |
{ |
774 |
BDRVRawState *s = bs->opaque; |
775 |
if (s->type != FTYPE_FILE)
|
776 |
return -ENOTSUP;
|
777 |
if (ftruncate(s->fd, offset) < 0) |
778 |
return -errno;
|
779 |
return 0; |
780 |
} |
781 |
|
782 |
#ifdef __OpenBSD__
|
783 |
static int64_t raw_getlength(BlockDriverState *bs)
|
784 |
{ |
785 |
BDRVRawState *s = bs->opaque; |
786 |
int fd = s->fd;
|
787 |
struct stat st;
|
788 |
|
789 |
if (fstat(fd, &st))
|
790 |
return -1; |
791 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
792 |
struct disklabel dl;
|
793 |
|
794 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
795 |
return -1; |
796 |
return (uint64_t)dl.d_secsize *
|
797 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
798 |
} else
|
799 |
return st.st_size;
|
800 |
} |
801 |
#else /* !__OpenBSD__ */ |
802 |
static int64_t raw_getlength(BlockDriverState *bs)
|
803 |
{ |
804 |
BDRVRawState *s = bs->opaque; |
805 |
int fd = s->fd;
|
806 |
int64_t size; |
807 |
#ifdef _BSD
|
808 |
struct stat sb;
|
809 |
#endif
|
810 |
#ifdef __sun__
|
811 |
struct dk_minfo minfo;
|
812 |
int rv;
|
813 |
#endif
|
814 |
int ret;
|
815 |
|
816 |
ret = fd_open(bs); |
817 |
if (ret < 0) |
818 |
return ret;
|
819 |
|
820 |
#ifdef _BSD
|
821 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
822 |
#ifdef DIOCGMEDIASIZE
|
823 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
824 |
#endif
|
825 |
#ifdef CONFIG_COCOA
|
826 |
size = LONG_LONG_MAX; |
827 |
#else
|
828 |
size = lseek(fd, 0LL, SEEK_END);
|
829 |
#endif
|
830 |
} else
|
831 |
#endif
|
832 |
#ifdef __sun__
|
833 |
/*
|
834 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
835 |
*/
|
836 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
837 |
if ( rv != -1 ) { |
838 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
839 |
} else /* there are reports that lseek on some devices |
840 |
fails, but irc discussion said that contingency
|
841 |
on contingency was overkill */
|
842 |
#endif
|
843 |
{ |
844 |
size = lseek(fd, 0, SEEK_END);
|
845 |
} |
846 |
return size;
|
847 |
} |
848 |
#endif
|
849 |
|
850 |
static int raw_create(const char *filename, int64_t total_size, |
851 |
const char *backing_file, int flags) |
852 |
{ |
853 |
int fd;
|
854 |
|
855 |
if (flags || backing_file)
|
856 |
return -ENOTSUP;
|
857 |
|
858 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
859 |
0644);
|
860 |
if (fd < 0) |
861 |
return -EIO;
|
862 |
ftruncate(fd, total_size * 512);
|
863 |
close(fd); |
864 |
return 0; |
865 |
} |
866 |
|
867 |
static void raw_flush(BlockDriverState *bs) |
868 |
{ |
869 |
BDRVRawState *s = bs->opaque; |
870 |
fsync(s->fd); |
871 |
} |
872 |
|
873 |
BlockDriver bdrv_raw = { |
874 |
"raw",
|
875 |
sizeof(BDRVRawState),
|
876 |
NULL, /* no probe for protocols */ |
877 |
raw_open, |
878 |
NULL,
|
879 |
NULL,
|
880 |
raw_close, |
881 |
raw_create, |
882 |
raw_flush, |
883 |
|
884 |
#ifdef CONFIG_AIO
|
885 |
.bdrv_aio_read = raw_aio_read, |
886 |
.bdrv_aio_write = raw_aio_write, |
887 |
.bdrv_aio_cancel = raw_aio_cancel, |
888 |
.aiocb_size = sizeof(RawAIOCB),
|
889 |
#endif
|
890 |
.bdrv_pread = raw_pread, |
891 |
.bdrv_pwrite = raw_pwrite, |
892 |
.bdrv_truncate = raw_truncate, |
893 |
.bdrv_getlength = raw_getlength, |
894 |
}; |
895 |
|
896 |
/***********************************************/
|
897 |
/* host device */
|
898 |
|
899 |
#ifdef CONFIG_COCOA
|
900 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
901 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
902 |
|
903 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
904 |
{ |
905 |
kern_return_t kernResult; |
906 |
mach_port_t masterPort; |
907 |
CFMutableDictionaryRef classesToMatch; |
908 |
|
909 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
910 |
if ( KERN_SUCCESS != kernResult ) {
|
911 |
printf( "IOMasterPort returned %d\n", kernResult );
|
912 |
} |
913 |
|
914 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
915 |
if ( classesToMatch == NULL ) { |
916 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
917 |
} else {
|
918 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
919 |
} |
920 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
921 |
if ( KERN_SUCCESS != kernResult )
|
922 |
{ |
923 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
924 |
} |
925 |
|
926 |
return kernResult;
|
927 |
} |
928 |
|
929 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
930 |
{ |
931 |
io_object_t nextMedia; |
932 |
kern_return_t kernResult = KERN_FAILURE; |
933 |
*bsdPath = '\0';
|
934 |
nextMedia = IOIteratorNext( mediaIterator ); |
935 |
if ( nextMedia )
|
936 |
{ |
937 |
CFTypeRef bsdPathAsCFString; |
938 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
939 |
if ( bsdPathAsCFString ) {
|
940 |
size_t devPathLength; |
941 |
strcpy( bsdPath, _PATH_DEV ); |
942 |
strcat( bsdPath, "r" );
|
943 |
devPathLength = strlen( bsdPath ); |
944 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
945 |
kernResult = KERN_SUCCESS; |
946 |
} |
947 |
CFRelease( bsdPathAsCFString ); |
948 |
} |
949 |
IOObjectRelease( nextMedia ); |
950 |
} |
951 |
|
952 |
return kernResult;
|
953 |
} |
954 |
|
955 |
#endif
|
956 |
|
957 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
958 |
{ |
959 |
BDRVRawState *s = bs->opaque; |
960 |
int fd, open_flags, ret, i;
|
961 |
|
962 |
posix_aio_init(); |
963 |
|
964 |
#ifdef CONFIG_COCOA
|
965 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
966 |
kern_return_t kernResult; |
967 |
io_iterator_t mediaIterator; |
968 |
char bsdPath[ MAXPATHLEN ];
|
969 |
int fd;
|
970 |
|
971 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
972 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
973 |
|
974 |
if ( bsdPath[ 0 ] != '\0' ) { |
975 |
strcat(bsdPath,"s0");
|
976 |
/* some CDs don't have a partition 0 */
|
977 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
978 |
if (fd < 0) { |
979 |
bsdPath[strlen(bsdPath)-1] = '1'; |
980 |
} else {
|
981 |
close(fd); |
982 |
} |
983 |
filename = bsdPath; |
984 |
} |
985 |
|
986 |
if ( mediaIterator )
|
987 |
IOObjectRelease( mediaIterator ); |
988 |
} |
989 |
#endif
|
990 |
open_flags = O_BINARY; |
991 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
992 |
open_flags |= O_RDWR; |
993 |
} else {
|
994 |
open_flags |= O_RDONLY; |
995 |
bs->read_only = 1;
|
996 |
} |
997 |
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
|
998 |
* and O_DIRECT for no caching. */
|
999 |
if ((flags & BDRV_O_NOCACHE))
|
1000 |
open_flags |= O_DIRECT; |
1001 |
else if (!(flags & BDRV_O_CACHE_WB)) |
1002 |
open_flags |= O_DSYNC; |
1003 |
|
1004 |
s->type = FTYPE_FILE; |
1005 |
#if defined(__linux__)
|
1006 |
if (strstart(filename, "/dev/cd", NULL)) { |
1007 |
/* open will not fail even if no CD is inserted */
|
1008 |
open_flags |= O_NONBLOCK; |
1009 |
s->type = FTYPE_CD; |
1010 |
} else if (strstart(filename, "/dev/fd", NULL)) { |
1011 |
s->type = FTYPE_FD; |
1012 |
s->fd_open_flags = open_flags; |
1013 |
/* open will not fail even if no floppy is inserted */
|
1014 |
open_flags |= O_NONBLOCK; |
1015 |
} else if (strstart(filename, "/dev/sg", NULL)) { |
1016 |
bs->sg = 1;
|
1017 |
} |
1018 |
#endif
|
1019 |
fd = open(filename, open_flags, 0644);
|
1020 |
if (fd < 0) { |
1021 |
ret = -errno; |
1022 |
if (ret == -EROFS)
|
1023 |
ret = -EACCES; |
1024 |
return ret;
|
1025 |
} |
1026 |
s->fd = fd; |
1027 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) |
1028 |
s->fd_pool[i] = -1;
|
1029 |
#if defined(__linux__)
|
1030 |
/* close fd so that we can reopen it as needed */
|
1031 |
if (s->type == FTYPE_FD) {
|
1032 |
close(s->fd); |
1033 |
s->fd = -1;
|
1034 |
s->fd_media_changed = 1;
|
1035 |
} |
1036 |
#endif
|
1037 |
return 0; |
1038 |
} |
1039 |
|
1040 |
#if defined(__linux__)
|
1041 |
/* Note: we do not have a reliable method to detect if the floppy is
|
1042 |
present. The current method is to try to open the floppy at every
|
1043 |
I/O and to keep it opened during a few hundreds of ms. */
|
1044 |
static int fd_open(BlockDriverState *bs) |
1045 |
{ |
1046 |
BDRVRawState *s = bs->opaque; |
1047 |
int last_media_present;
|
1048 |
|
1049 |
if (s->type != FTYPE_FD)
|
1050 |
return 0; |
1051 |
last_media_present = (s->fd >= 0);
|
1052 |
if (s->fd >= 0 && |
1053 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
1054 |
close(s->fd); |
1055 |
s->fd = -1;
|
1056 |
raw_close_fd_pool(s); |
1057 |
#ifdef DEBUG_FLOPPY
|
1058 |
printf("Floppy closed\n");
|
1059 |
#endif
|
1060 |
} |
1061 |
if (s->fd < 0) { |
1062 |
if (s->fd_got_error &&
|
1063 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
1064 |
#ifdef DEBUG_FLOPPY
|
1065 |
printf("No floppy (open delayed)\n");
|
1066 |
#endif
|
1067 |
return -EIO;
|
1068 |
} |
1069 |
s->fd = open(bs->filename, s->fd_open_flags); |
1070 |
if (s->fd < 0) { |
1071 |
s->fd_error_time = qemu_get_clock(rt_clock); |
1072 |
s->fd_got_error = 1;
|
1073 |
if (last_media_present)
|
1074 |
s->fd_media_changed = 1;
|
1075 |
#ifdef DEBUG_FLOPPY
|
1076 |
printf("No floppy\n");
|
1077 |
#endif
|
1078 |
return -EIO;
|
1079 |
} |
1080 |
#ifdef DEBUG_FLOPPY
|
1081 |
printf("Floppy opened\n");
|
1082 |
#endif
|
1083 |
} |
1084 |
if (!last_media_present)
|
1085 |
s->fd_media_changed = 1;
|
1086 |
s->fd_open_time = qemu_get_clock(rt_clock); |
1087 |
s->fd_got_error = 0;
|
1088 |
return 0; |
1089 |
} |
1090 |
|
1091 |
static int raw_is_inserted(BlockDriverState *bs) |
1092 |
{ |
1093 |
BDRVRawState *s = bs->opaque; |
1094 |
int ret;
|
1095 |
|
1096 |
switch(s->type) {
|
1097 |
case FTYPE_CD:
|
1098 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1099 |
if (ret == CDS_DISC_OK)
|
1100 |
return 1; |
1101 |
else
|
1102 |
return 0; |
1103 |
break;
|
1104 |
case FTYPE_FD:
|
1105 |
ret = fd_open(bs); |
1106 |
return (ret >= 0); |
1107 |
default:
|
1108 |
return 1; |
1109 |
} |
1110 |
} |
1111 |
|
1112 |
/* currently only used by fdc.c, but a CD version would be good too */
|
1113 |
static int raw_media_changed(BlockDriverState *bs) |
1114 |
{ |
1115 |
BDRVRawState *s = bs->opaque; |
1116 |
|
1117 |
switch(s->type) {
|
1118 |
case FTYPE_FD:
|
1119 |
{ |
1120 |
int ret;
|
1121 |
/* XXX: we do not have a true media changed indication. It
|
1122 |
does not work if the floppy is changed without trying
|
1123 |
to read it */
|
1124 |
fd_open(bs); |
1125 |
ret = s->fd_media_changed; |
1126 |
s->fd_media_changed = 0;
|
1127 |
#ifdef DEBUG_FLOPPY
|
1128 |
printf("Floppy changed=%d\n", ret);
|
1129 |
#endif
|
1130 |
return ret;
|
1131 |
} |
1132 |
default:
|
1133 |
return -ENOTSUP;
|
1134 |
} |
1135 |
} |
1136 |
|
1137 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1138 |
{ |
1139 |
BDRVRawState *s = bs->opaque; |
1140 |
|
1141 |
switch(s->type) {
|
1142 |
case FTYPE_CD:
|
1143 |
if (eject_flag) {
|
1144 |
if (ioctl (s->fd, CDROMEJECT, NULL) < 0) |
1145 |
perror("CDROMEJECT");
|
1146 |
} else {
|
1147 |
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0) |
1148 |
perror("CDROMEJECT");
|
1149 |
} |
1150 |
break;
|
1151 |
case FTYPE_FD:
|
1152 |
{ |
1153 |
int fd;
|
1154 |
if (s->fd >= 0) { |
1155 |
close(s->fd); |
1156 |
s->fd = -1;
|
1157 |
raw_close_fd_pool(s); |
1158 |
} |
1159 |
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK); |
1160 |
if (fd >= 0) { |
1161 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1162 |
perror("FDEJECT");
|
1163 |
close(fd); |
1164 |
} |
1165 |
} |
1166 |
break;
|
1167 |
default:
|
1168 |
return -ENOTSUP;
|
1169 |
} |
1170 |
return 0; |
1171 |
} |
1172 |
|
1173 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1174 |
{ |
1175 |
BDRVRawState *s = bs->opaque; |
1176 |
|
1177 |
switch(s->type) {
|
1178 |
case FTYPE_CD:
|
1179 |
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1180 |
/* Note: an error can happen if the distribution automatically
|
1181 |
mounts the CD-ROM */
|
1182 |
// perror("CDROM_LOCKDOOR");
|
1183 |
} |
1184 |
break;
|
1185 |
default:
|
1186 |
return -ENOTSUP;
|
1187 |
} |
1188 |
return 0; |
1189 |
} |
1190 |
|
1191 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1192 |
{ |
1193 |
BDRVRawState *s = bs->opaque; |
1194 |
|
1195 |
return ioctl(s->fd, req, buf);
|
1196 |
} |
1197 |
#else
|
1198 |
|
1199 |
static int fd_open(BlockDriverState *bs) |
1200 |
{ |
1201 |
return 0; |
1202 |
} |
1203 |
|
1204 |
static int raw_is_inserted(BlockDriverState *bs) |
1205 |
{ |
1206 |
return 1; |
1207 |
} |
1208 |
|
1209 |
static int raw_media_changed(BlockDriverState *bs) |
1210 |
{ |
1211 |
return -ENOTSUP;
|
1212 |
} |
1213 |
|
1214 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1215 |
{ |
1216 |
return -ENOTSUP;
|
1217 |
} |
1218 |
|
1219 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1220 |
{ |
1221 |
return -ENOTSUP;
|
1222 |
} |
1223 |
|
1224 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1225 |
{ |
1226 |
return -ENOTSUP;
|
1227 |
} |
1228 |
#endif /* !linux */ |
1229 |
|
1230 |
BlockDriver bdrv_host_device = { |
1231 |
"host_device",
|
1232 |
sizeof(BDRVRawState),
|
1233 |
NULL, /* no probe for protocols */ |
1234 |
hdev_open, |
1235 |
NULL,
|
1236 |
NULL,
|
1237 |
raw_close, |
1238 |
NULL,
|
1239 |
raw_flush, |
1240 |
|
1241 |
#ifdef CONFIG_AIO
|
1242 |
.bdrv_aio_read = raw_aio_read, |
1243 |
.bdrv_aio_write = raw_aio_write, |
1244 |
.bdrv_aio_cancel = raw_aio_cancel, |
1245 |
.aiocb_size = sizeof(RawAIOCB),
|
1246 |
#endif
|
1247 |
.bdrv_pread = raw_pread, |
1248 |
.bdrv_pwrite = raw_pwrite, |
1249 |
.bdrv_getlength = raw_getlength, |
1250 |
|
1251 |
/* removable device support */
|
1252 |
.bdrv_is_inserted = raw_is_inserted, |
1253 |
.bdrv_media_changed = raw_media_changed, |
1254 |
.bdrv_eject = raw_eject, |
1255 |
.bdrv_set_locked = raw_set_locked, |
1256 |
/* generic scsi device */
|
1257 |
.bdrv_ioctl = raw_ioctl, |
1258 |
}; |