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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 "qemu-log.h" | |
28 | #include "block_int.h" | |
29 | #include "module.h" | |
30 | #include "block/raw-posix-aio.h" | |
31 | ||
32 | #if defined(__APPLE__) && (__MACH__) | |
33 | #include <paths.h> | |
34 | #include <sys/param.h> | |
35 | #include <IOKit/IOKitLib.h> | |
36 | #include <IOKit/IOBSD.h> | |
37 | #include <IOKit/storage/IOMediaBSDClient.h> | |
38 | #include <IOKit/storage/IOMedia.h> | |
39 | #include <IOKit/storage/IOCDMedia.h> | |
40 | //#include <IOKit/storage/IOCDTypes.h> | |
41 | #include <CoreFoundation/CoreFoundation.h> | |
42 | #endif | |
43 | ||
44 | #ifdef __sun__ | |
45 | #define _POSIX_PTHREAD_SEMANTICS 1 | |
46 | #include <sys/dkio.h> | |
47 | #endif | |
48 | #ifdef __linux__ | |
49 | #include <sys/types.h> | |
50 | #include <sys/stat.h> | |
51 | #include <sys/ioctl.h> | |
52 | #include <sys/param.h> | |
53 | #include <linux/cdrom.h> | |
54 | #include <linux/fd.h> | |
55 | #include <linux/fs.h> | |
56 | #endif | |
57 | #ifdef CONFIG_FIEMAP | |
58 | #include <linux/fiemap.h> | |
59 | #endif | |
60 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) | |
61 | #include <sys/disk.h> | |
62 | #include <sys/cdio.h> | |
63 | #endif | |
64 | ||
65 | #ifdef __OpenBSD__ | |
66 | #include <sys/ioctl.h> | |
67 | #include <sys/disklabel.h> | |
68 | #include <sys/dkio.h> | |
69 | #endif | |
70 | ||
71 | #ifdef __NetBSD__ | |
72 | #include <sys/ioctl.h> | |
73 | #include <sys/disklabel.h> | |
74 | #include <sys/dkio.h> | |
75 | #include <sys/disk.h> | |
76 | #endif | |
77 | ||
78 | #ifdef __DragonFly__ | |
79 | #include <sys/ioctl.h> | |
80 | #include <sys/diskslice.h> | |
81 | #endif | |
82 | ||
83 | #ifdef CONFIG_XFS | |
84 | #include <xfs/xfs.h> | |
85 | #endif | |
86 | ||
87 | //#define DEBUG_FLOPPY | |
88 | ||
89 | //#define DEBUG_BLOCK | |
90 | #if defined(DEBUG_BLOCK) | |
91 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ | |
92 | { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) | |
93 | #else | |
94 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) | |
95 | #endif | |
96 | ||
97 | /* OS X does not have O_DSYNC */ | |
98 | #ifndef O_DSYNC | |
99 | #ifdef O_SYNC | |
100 | #define O_DSYNC O_SYNC | |
101 | #elif defined(O_FSYNC) | |
102 | #define O_DSYNC O_FSYNC | |
103 | #endif | |
104 | #endif | |
105 | ||
106 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ | |
107 | #ifndef O_DIRECT | |
108 | #define O_DIRECT O_DSYNC | |
109 | #endif | |
110 | ||
111 | #define FTYPE_FILE 0 | |
112 | #define FTYPE_CD 1 | |
113 | #define FTYPE_FD 2 | |
114 | ||
115 | /* if the FD is not accessed during that time (in ns), we try to | |
116 | reopen it to see if the disk has been changed */ | |
117 | #define FD_OPEN_TIMEOUT (1000000000) | |
118 | ||
119 | #define MAX_BLOCKSIZE 4096 | |
120 | ||
121 | typedef struct BDRVRawState { | |
122 | int fd; | |
123 | int type; | |
124 | int open_flags; | |
125 | #if defined(__linux__) | |
126 | /* linux floppy specific */ | |
127 | int64_t fd_open_time; | |
128 | int64_t fd_error_time; | |
129 | int fd_got_error; | |
130 | int fd_media_changed; | |
131 | #endif | |
132 | #ifdef CONFIG_LINUX_AIO | |
133 | int use_aio; | |
134 | void *aio_ctx; | |
135 | #endif | |
136 | uint8_t *aligned_buf; | |
137 | unsigned aligned_buf_size; | |
138 | #ifdef CONFIG_XFS | |
139 | bool is_xfs : 1; | |
140 | #endif | |
141 | } BDRVRawState; | |
142 | ||
143 | static int fd_open(BlockDriverState *bs); | |
144 | static int64_t raw_getlength(BlockDriverState *bs); | |
145 | ||
146 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) | |
147 | static int cdrom_reopen(BlockDriverState *bs); | |
148 | #endif | |
149 | ||
150 | #if defined(__NetBSD__) | |
151 | static int raw_normalize_devicepath(const char **filename) | |
152 | { | |
153 | static char namebuf[PATH_MAX]; | |
154 | const char *dp, *fname; | |
155 | struct stat sb; | |
156 | ||
157 | fname = *filename; | |
158 | dp = strrchr(fname, '/'); | |
159 | if (lstat(fname, &sb) < 0) { | |
160 | fprintf(stderr, "%s: stat failed: %s\n", | |
161 | fname, strerror(errno)); | |
162 | return -errno; | |
163 | } | |
164 | ||
165 | if (!S_ISBLK(sb.st_mode)) { | |
166 | return 0; | |
167 | } | |
168 | ||
169 | if (dp == NULL) { | |
170 | snprintf(namebuf, PATH_MAX, "r%s", fname); | |
171 | } else { | |
172 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", | |
173 | (int)(dp - fname), fname, dp + 1); | |
174 | } | |
175 | fprintf(stderr, "%s is a block device", fname); | |
176 | *filename = namebuf; | |
177 | fprintf(stderr, ", using %s\n", *filename); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | #else | |
182 | static int raw_normalize_devicepath(const char **filename) | |
183 | { | |
184 | return 0; | |
185 | } | |
186 | #endif | |
187 | ||
188 | static int raw_open_common(BlockDriverState *bs, const char *filename, | |
189 | int bdrv_flags, int open_flags) | |
190 | { | |
191 | BDRVRawState *s = bs->opaque; | |
192 | int fd, ret; | |
193 | ||
194 | ret = raw_normalize_devicepath(&filename); | |
195 | if (ret != 0) { | |
196 | return ret; | |
197 | } | |
198 | ||
199 | s->open_flags = open_flags | O_BINARY; | |
200 | s->open_flags &= ~O_ACCMODE; | |
201 | if (bdrv_flags & BDRV_O_RDWR) { | |
202 | s->open_flags |= O_RDWR; | |
203 | } else { | |
204 | s->open_flags |= O_RDONLY; | |
205 | } | |
206 | ||
207 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
208 | * and O_DIRECT for no caching. */ | |
209 | if ((bdrv_flags & BDRV_O_NOCACHE)) | |
210 | s->open_flags |= O_DIRECT; | |
211 | if (!(bdrv_flags & BDRV_O_CACHE_WB)) | |
212 | s->open_flags |= O_DSYNC; | |
213 | ||
214 | s->fd = -1; | |
215 | fd = qemu_open(filename, s->open_flags, 0644); | |
216 | if (fd < 0) { | |
217 | ret = -errno; | |
218 | if (ret == -EROFS) | |
219 | ret = -EACCES; | |
220 | return ret; | |
221 | } | |
222 | s->fd = fd; | |
223 | s->aligned_buf = NULL; | |
224 | ||
225 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
226 | /* | |
227 | * Allocate a buffer for read/modify/write cycles. Chose the size | |
228 | * pessimistically as we don't know the block size yet. | |
229 | */ | |
230 | s->aligned_buf_size = 32 * MAX_BLOCKSIZE; | |
231 | s->aligned_buf = qemu_memalign(MAX_BLOCKSIZE, s->aligned_buf_size); | |
232 | if (s->aligned_buf == NULL) { | |
233 | goto out_close; | |
234 | } | |
235 | } | |
236 | ||
237 | /* We're falling back to POSIX AIO in some cases so init always */ | |
238 | if (paio_init() < 0) { | |
239 | goto out_free_buf; | |
240 | } | |
241 | ||
242 | #ifdef CONFIG_LINUX_AIO | |
243 | /* | |
244 | * Currently Linux do AIO only for files opened with O_DIRECT | |
245 | * specified so check NOCACHE flag too | |
246 | */ | |
247 | if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) == | |
248 | (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { | |
249 | ||
250 | s->aio_ctx = laio_init(); | |
251 | if (!s->aio_ctx) { | |
252 | goto out_free_buf; | |
253 | } | |
254 | s->use_aio = 1; | |
255 | } else | |
256 | #endif | |
257 | { | |
258 | #ifdef CONFIG_LINUX_AIO | |
259 | s->use_aio = 0; | |
260 | #endif | |
261 | } | |
262 | ||
263 | #ifdef CONFIG_XFS | |
264 | if (platform_test_xfs_fd(s->fd)) { | |
265 | s->is_xfs = 1; | |
266 | } | |
267 | #endif | |
268 | ||
269 | return 0; | |
270 | ||
271 | out_free_buf: | |
272 | qemu_vfree(s->aligned_buf); | |
273 | out_close: | |
274 | close(fd); | |
275 | return -errno; | |
276 | } | |
277 | ||
278 | static int raw_open(BlockDriverState *bs, const char *filename, int flags) | |
279 | { | |
280 | BDRVRawState *s = bs->opaque; | |
281 | ||
282 | s->type = FTYPE_FILE; | |
283 | return raw_open_common(bs, filename, flags, 0); | |
284 | } | |
285 | ||
286 | /* XXX: use host sector size if necessary with: | |
287 | #ifdef DIOCGSECTORSIZE | |
288 | { | |
289 | unsigned int sectorsize = 512; | |
290 | if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) && | |
291 | sectorsize > bufsize) | |
292 | bufsize = sectorsize; | |
293 | } | |
294 | #endif | |
295 | #ifdef CONFIG_COCOA | |
296 | uint32_t blockSize = 512; | |
297 | if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) { | |
298 | bufsize = blockSize; | |
299 | } | |
300 | #endif | |
301 | */ | |
302 | ||
303 | /* | |
304 | * Check if all memory in this vector is sector aligned. | |
305 | */ | |
306 | static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov) | |
307 | { | |
308 | int i; | |
309 | ||
310 | for (i = 0; i < qiov->niov; i++) { | |
311 | if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) { | |
312 | return 0; | |
313 | } | |
314 | } | |
315 | ||
316 | return 1; | |
317 | } | |
318 | ||
319 | static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs, | |
320 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
321 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
322 | { | |
323 | BDRVRawState *s = bs->opaque; | |
324 | ||
325 | if (fd_open(bs) < 0) | |
326 | return NULL; | |
327 | ||
328 | /* | |
329 | * If O_DIRECT is used the buffer needs to be aligned on a sector | |
330 | * boundary. Check if this is the case or tell the low-level | |
331 | * driver that it needs to copy the buffer. | |
332 | */ | |
333 | if (s->aligned_buf) { | |
334 | if (!qiov_is_aligned(bs, qiov)) { | |
335 | type |= QEMU_AIO_MISALIGNED; | |
336 | #ifdef CONFIG_LINUX_AIO | |
337 | } else if (s->use_aio) { | |
338 | return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, | |
339 | nb_sectors, cb, opaque, type); | |
340 | #endif | |
341 | } | |
342 | } | |
343 | ||
344 | return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors, | |
345 | cb, opaque, type); | |
346 | } | |
347 | ||
348 | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, | |
349 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
350 | BlockDriverCompletionFunc *cb, void *opaque) | |
351 | { | |
352 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, | |
353 | cb, opaque, QEMU_AIO_READ); | |
354 | } | |
355 | ||
356 | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, | |
357 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
358 | BlockDriverCompletionFunc *cb, void *opaque) | |
359 | { | |
360 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, | |
361 | cb, opaque, QEMU_AIO_WRITE); | |
362 | } | |
363 | ||
364 | static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs, | |
365 | BlockDriverCompletionFunc *cb, void *opaque) | |
366 | { | |
367 | BDRVRawState *s = bs->opaque; | |
368 | ||
369 | if (fd_open(bs) < 0) | |
370 | return NULL; | |
371 | ||
372 | return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); | |
373 | } | |
374 | ||
375 | static void raw_close(BlockDriverState *bs) | |
376 | { | |
377 | BDRVRawState *s = bs->opaque; | |
378 | if (s->fd >= 0) { | |
379 | close(s->fd); | |
380 | s->fd = -1; | |
381 | if (s->aligned_buf != NULL) | |
382 | qemu_vfree(s->aligned_buf); | |
383 | } | |
384 | } | |
385 | ||
386 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
387 | { | |
388 | BDRVRawState *s = bs->opaque; | |
389 | struct stat st; | |
390 | ||
391 | if (fstat(s->fd, &st)) { | |
392 | return -errno; | |
393 | } | |
394 | ||
395 | if (S_ISREG(st.st_mode)) { | |
396 | if (ftruncate(s->fd, offset) < 0) { | |
397 | return -errno; | |
398 | } | |
399 | } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
400 | if (offset > raw_getlength(bs)) { | |
401 | return -EINVAL; | |
402 | } | |
403 | } else { | |
404 | return -ENOTSUP; | |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | #ifdef __OpenBSD__ | |
411 | static int64_t raw_getlength(BlockDriverState *bs) | |
412 | { | |
413 | BDRVRawState *s = bs->opaque; | |
414 | int fd = s->fd; | |
415 | struct stat st; | |
416 | ||
417 | if (fstat(fd, &st)) | |
418 | return -1; | |
419 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
420 | struct disklabel dl; | |
421 | ||
422 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
423 | return -1; | |
424 | return (uint64_t)dl.d_secsize * | |
425 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
426 | } else | |
427 | return st.st_size; | |
428 | } | |
429 | #elif defined(__NetBSD__) | |
430 | static int64_t raw_getlength(BlockDriverState *bs) | |
431 | { | |
432 | BDRVRawState *s = bs->opaque; | |
433 | int fd = s->fd; | |
434 | struct stat st; | |
435 | ||
436 | if (fstat(fd, &st)) | |
437 | return -1; | |
438 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
439 | struct dkwedge_info dkw; | |
440 | ||
441 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
442 | return dkw.dkw_size * 512; | |
443 | } else { | |
444 | struct disklabel dl; | |
445 | ||
446 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
447 | return -1; | |
448 | return (uint64_t)dl.d_secsize * | |
449 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
450 | } | |
451 | } else | |
452 | return st.st_size; | |
453 | } | |
454 | #elif defined(__sun__) | |
455 | static int64_t raw_getlength(BlockDriverState *bs) | |
456 | { | |
457 | BDRVRawState *s = bs->opaque; | |
458 | struct dk_minfo minfo; | |
459 | int ret; | |
460 | ||
461 | ret = fd_open(bs); | |
462 | if (ret < 0) { | |
463 | return ret; | |
464 | } | |
465 | ||
466 | /* | |
467 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
468 | */ | |
469 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
470 | if (ret != -1) { | |
471 | return minfo.dki_lbsize * minfo.dki_capacity; | |
472 | } | |
473 | ||
474 | /* | |
475 | * There are reports that lseek on some devices fails, but | |
476 | * irc discussion said that contingency on contingency was overkill. | |
477 | */ | |
478 | return lseek(s->fd, 0, SEEK_END); | |
479 | } | |
480 | #elif defined(CONFIG_BSD) | |
481 | static int64_t raw_getlength(BlockDriverState *bs) | |
482 | { | |
483 | BDRVRawState *s = bs->opaque; | |
484 | int fd = s->fd; | |
485 | int64_t size; | |
486 | struct stat sb; | |
487 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) | |
488 | int reopened = 0; | |
489 | #endif | |
490 | int ret; | |
491 | ||
492 | ret = fd_open(bs); | |
493 | if (ret < 0) | |
494 | return ret; | |
495 | ||
496 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) | |
497 | again: | |
498 | #endif | |
499 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { | |
500 | #ifdef DIOCGMEDIASIZE | |
501 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
502 | #elif defined(DIOCGPART) | |
503 | { | |
504 | struct partinfo pi; | |
505 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
506 | size = pi.media_size; | |
507 | else | |
508 | size = 0; | |
509 | } | |
510 | if (size == 0) | |
511 | #endif | |
512 | #if defined(__APPLE__) && defined(__MACH__) | |
513 | size = LONG_LONG_MAX; | |
514 | #else | |
515 | size = lseek(fd, 0LL, SEEK_END); | |
516 | #endif | |
517 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) | |
518 | switch(s->type) { | |
519 | case FTYPE_CD: | |
520 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
521 | if (size == 2048LL * (unsigned)-1) | |
522 | size = 0; | |
523 | /* XXX no disc? maybe we need to reopen... */ | |
524 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { | |
525 | reopened = 1; | |
526 | goto again; | |
527 | } | |
528 | } | |
529 | #endif | |
530 | } else { | |
531 | size = lseek(fd, 0, SEEK_END); | |
532 | } | |
533 | return size; | |
534 | } | |
535 | #else | |
536 | static int64_t raw_getlength(BlockDriverState *bs) | |
537 | { | |
538 | BDRVRawState *s = bs->opaque; | |
539 | int ret; | |
540 | ||
541 | ret = fd_open(bs); | |
542 | if (ret < 0) { | |
543 | return ret; | |
544 | } | |
545 | ||
546 | return lseek(s->fd, 0, SEEK_END); | |
547 | } | |
548 | #endif | |
549 | ||
550 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) | |
551 | { | |
552 | struct stat st; | |
553 | BDRVRawState *s = bs->opaque; | |
554 | ||
555 | if (fstat(s->fd, &st) < 0) { | |
556 | return -errno; | |
557 | } | |
558 | return (int64_t)st.st_blocks * 512; | |
559 | } | |
560 | ||
561 | static int raw_create(const char *filename, QEMUOptionParameter *options) | |
562 | { | |
563 | int fd; | |
564 | int result = 0; | |
565 | int64_t total_size = 0; | |
566 | ||
567 | /* Read out options */ | |
568 | while (options && options->name) { | |
569 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
570 | total_size = options->value.n / BDRV_SECTOR_SIZE; | |
571 | } | |
572 | options++; | |
573 | } | |
574 | ||
575 | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, | |
576 | 0644); | |
577 | if (fd < 0) { | |
578 | result = -errno; | |
579 | } else { | |
580 | if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { | |
581 | result = -errno; | |
582 | } | |
583 | if (close(fd) != 0) { | |
584 | result = -errno; | |
585 | } | |
586 | } | |
587 | return result; | |
588 | } | |
589 | ||
590 | /* | |
591 | * Returns true iff the specified sector is present in the disk image. Drivers | |
592 | * not implementing the functionality are assumed to not support backing files, | |
593 | * hence all their sectors are reported as allocated. | |
594 | * | |
595 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
596 | * and 'pnum' is set to 0. | |
597 | * | |
598 | * 'pnum' is set to the number of sectors (including and immediately following | |
599 | * the specified sector) that are known to be in the same | |
600 | * allocated/unallocated state. | |
601 | * | |
602 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
603 | * beyond the end of the disk image it will be clamped. | |
604 | */ | |
605 | static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs, | |
606 | int64_t sector_num, | |
607 | int nb_sectors, int *pnum) | |
608 | { | |
609 | off_t start, data, hole; | |
610 | int ret; | |
611 | ||
612 | ret = fd_open(bs); | |
613 | if (ret < 0) { | |
614 | return ret; | |
615 | } | |
616 | ||
617 | start = sector_num * BDRV_SECTOR_SIZE; | |
618 | ||
619 | #ifdef CONFIG_FIEMAP | |
620 | ||
621 | BDRVRawState *s = bs->opaque; | |
622 | struct { | |
623 | struct fiemap fm; | |
624 | struct fiemap_extent fe; | |
625 | } f; | |
626 | ||
627 | f.fm.fm_start = start; | |
628 | f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE; | |
629 | f.fm.fm_flags = 0; | |
630 | f.fm.fm_extent_count = 1; | |
631 | f.fm.fm_reserved = 0; | |
632 | if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) { | |
633 | /* Assume everything is allocated. */ | |
634 | *pnum = nb_sectors; | |
635 | return 1; | |
636 | } | |
637 | ||
638 | if (f.fm.fm_mapped_extents == 0) { | |
639 | /* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length. | |
640 | * f.fm.fm_start + f.fm.fm_length must be clamped to the file size! | |
641 | */ | |
642 | off_t length = lseek(s->fd, 0, SEEK_END); | |
643 | hole = f.fm.fm_start; | |
644 | data = MIN(f.fm.fm_start + f.fm.fm_length, length); | |
645 | } else { | |
646 | data = f.fe.fe_logical; | |
647 | hole = f.fe.fe_logical + f.fe.fe_length; | |
648 | } | |
649 | ||
650 | #elif defined SEEK_HOLE && defined SEEK_DATA | |
651 | ||
652 | BDRVRawState *s = bs->opaque; | |
653 | ||
654 | hole = lseek(s->fd, start, SEEK_HOLE); | |
655 | if (hole == -1) { | |
656 | /* -ENXIO indicates that sector_num was past the end of the file. | |
657 | * There is a virtual hole there. */ | |
658 | assert(errno != -ENXIO); | |
659 | ||
660 | /* Most likely EINVAL. Assume everything is allocated. */ | |
661 | *pnum = nb_sectors; | |
662 | return 1; | |
663 | } | |
664 | ||
665 | if (hole > start) { | |
666 | data = start; | |
667 | } else { | |
668 | /* On a hole. We need another syscall to find its end. */ | |
669 | data = lseek(s->fd, start, SEEK_DATA); | |
670 | if (data == -1) { | |
671 | data = lseek(s->fd, 0, SEEK_END); | |
672 | } | |
673 | } | |
674 | #else | |
675 | *pnum = nb_sectors; | |
676 | return 1; | |
677 | #endif | |
678 | ||
679 | if (data <= start) { | |
680 | /* On a data extent, compute sectors to the end of the extent. */ | |
681 | *pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); | |
682 | return 1; | |
683 | } else { | |
684 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
685 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); | |
686 | return 0; | |
687 | } | |
688 | } | |
689 | ||
690 | #ifdef CONFIG_XFS | |
691 | static int xfs_discard(BDRVRawState *s, int64_t sector_num, int nb_sectors) | |
692 | { | |
693 | struct xfs_flock64 fl; | |
694 | ||
695 | memset(&fl, 0, sizeof(fl)); | |
696 | fl.l_whence = SEEK_SET; | |
697 | fl.l_start = sector_num << 9; | |
698 | fl.l_len = (int64_t)nb_sectors << 9; | |
699 | ||
700 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
701 | DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno)); | |
702 | return -errno; | |
703 | } | |
704 | ||
705 | return 0; | |
706 | } | |
707 | #endif | |
708 | ||
709 | static coroutine_fn int raw_co_discard(BlockDriverState *bs, | |
710 | int64_t sector_num, int nb_sectors) | |
711 | { | |
712 | #ifdef CONFIG_XFS | |
713 | BDRVRawState *s = bs->opaque; | |
714 | ||
715 | if (s->is_xfs) { | |
716 | return xfs_discard(s, sector_num, nb_sectors); | |
717 | } | |
718 | #endif | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | static QEMUOptionParameter raw_create_options[] = { | |
724 | { | |
725 | .name = BLOCK_OPT_SIZE, | |
726 | .type = OPT_SIZE, | |
727 | .help = "Virtual disk size" | |
728 | }, | |
729 | { NULL } | |
730 | }; | |
731 | ||
732 | static BlockDriver bdrv_file = { | |
733 | .format_name = "file", | |
734 | .protocol_name = "file", | |
735 | .instance_size = sizeof(BDRVRawState), | |
736 | .bdrv_probe = NULL, /* no probe for protocols */ | |
737 | .bdrv_file_open = raw_open, | |
738 | .bdrv_close = raw_close, | |
739 | .bdrv_create = raw_create, | |
740 | .bdrv_co_discard = raw_co_discard, | |
741 | .bdrv_co_is_allocated = raw_co_is_allocated, | |
742 | ||
743 | .bdrv_aio_readv = raw_aio_readv, | |
744 | .bdrv_aio_writev = raw_aio_writev, | |
745 | .bdrv_aio_flush = raw_aio_flush, | |
746 | ||
747 | .bdrv_truncate = raw_truncate, | |
748 | .bdrv_getlength = raw_getlength, | |
749 | .bdrv_get_allocated_file_size | |
750 | = raw_get_allocated_file_size, | |
751 | ||
752 | .create_options = raw_create_options, | |
753 | }; | |
754 | ||
755 | /***********************************************/ | |
756 | /* host device */ | |
757 | ||
758 | #if defined(__APPLE__) && defined(__MACH__) | |
759 | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); | |
760 | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); | |
761 | ||
762 | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) | |
763 | { | |
764 | kern_return_t kernResult; | |
765 | mach_port_t masterPort; | |
766 | CFMutableDictionaryRef classesToMatch; | |
767 | ||
768 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
769 | if ( KERN_SUCCESS != kernResult ) { | |
770 | printf( "IOMasterPort returned %d\n", kernResult ); | |
771 | } | |
772 | ||
773 | classesToMatch = IOServiceMatching( kIOCDMediaClass ); | |
774 | if ( classesToMatch == NULL ) { | |
775 | printf( "IOServiceMatching returned a NULL dictionary.\n" ); | |
776 | } else { | |
777 | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); | |
778 | } | |
779 | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); | |
780 | if ( KERN_SUCCESS != kernResult ) | |
781 | { | |
782 | printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); | |
783 | } | |
784 | ||
785 | return kernResult; | |
786 | } | |
787 | ||
788 | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) | |
789 | { | |
790 | io_object_t nextMedia; | |
791 | kern_return_t kernResult = KERN_FAILURE; | |
792 | *bsdPath = '\0'; | |
793 | nextMedia = IOIteratorNext( mediaIterator ); | |
794 | if ( nextMedia ) | |
795 | { | |
796 | CFTypeRef bsdPathAsCFString; | |
797 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
798 | if ( bsdPathAsCFString ) { | |
799 | size_t devPathLength; | |
800 | strcpy( bsdPath, _PATH_DEV ); | |
801 | strcat( bsdPath, "r" ); | |
802 | devPathLength = strlen( bsdPath ); | |
803 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
804 | kernResult = KERN_SUCCESS; | |
805 | } | |
806 | CFRelease( bsdPathAsCFString ); | |
807 | } | |
808 | IOObjectRelease( nextMedia ); | |
809 | } | |
810 | ||
811 | return kernResult; | |
812 | } | |
813 | ||
814 | #endif | |
815 | ||
816 | static int hdev_probe_device(const char *filename) | |
817 | { | |
818 | struct stat st; | |
819 | ||
820 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
821 | if (strstart(filename, "/dev/cdrom", NULL)) | |
822 | return 50; | |
823 | ||
824 | if (stat(filename, &st) >= 0 && | |
825 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
826 | return 100; | |
827 | } | |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
832 | static int hdev_open(BlockDriverState *bs, const char *filename, int flags) | |
833 | { | |
834 | BDRVRawState *s = bs->opaque; | |
835 | ||
836 | #if defined(__APPLE__) && defined(__MACH__) | |
837 | if (strstart(filename, "/dev/cdrom", NULL)) { | |
838 | kern_return_t kernResult; | |
839 | io_iterator_t mediaIterator; | |
840 | char bsdPath[ MAXPATHLEN ]; | |
841 | int fd; | |
842 | ||
843 | kernResult = FindEjectableCDMedia( &mediaIterator ); | |
844 | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); | |
845 | ||
846 | if ( bsdPath[ 0 ] != '\0' ) { | |
847 | strcat(bsdPath,"s0"); | |
848 | /* some CDs don't have a partition 0 */ | |
849 | fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); | |
850 | if (fd < 0) { | |
851 | bsdPath[strlen(bsdPath)-1] = '1'; | |
852 | } else { | |
853 | close(fd); | |
854 | } | |
855 | filename = bsdPath; | |
856 | } | |
857 | ||
858 | if ( mediaIterator ) | |
859 | IOObjectRelease( mediaIterator ); | |
860 | } | |
861 | #endif | |
862 | ||
863 | s->type = FTYPE_FILE; | |
864 | #if defined(__linux__) | |
865 | { | |
866 | char resolved_path[ MAXPATHLEN ], *temp; | |
867 | ||
868 | temp = realpath(filename, resolved_path); | |
869 | if (temp && strstart(temp, "/dev/sg", NULL)) { | |
870 | bs->sg = 1; | |
871 | } | |
872 | } | |
873 | #endif | |
874 | ||
875 | return raw_open_common(bs, filename, flags, 0); | |
876 | } | |
877 | ||
878 | #if defined(__linux__) | |
879 | /* Note: we do not have a reliable method to detect if the floppy is | |
880 | present. The current method is to try to open the floppy at every | |
881 | I/O and to keep it opened during a few hundreds of ms. */ | |
882 | static int fd_open(BlockDriverState *bs) | |
883 | { | |
884 | BDRVRawState *s = bs->opaque; | |
885 | int last_media_present; | |
886 | ||
887 | if (s->type != FTYPE_FD) | |
888 | return 0; | |
889 | last_media_present = (s->fd >= 0); | |
890 | if (s->fd >= 0 && | |
891 | (get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { | |
892 | close(s->fd); | |
893 | s->fd = -1; | |
894 | #ifdef DEBUG_FLOPPY | |
895 | printf("Floppy closed\n"); | |
896 | #endif | |
897 | } | |
898 | if (s->fd < 0) { | |
899 | if (s->fd_got_error && | |
900 | (get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { | |
901 | #ifdef DEBUG_FLOPPY | |
902 | printf("No floppy (open delayed)\n"); | |
903 | #endif | |
904 | return -EIO; | |
905 | } | |
906 | s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK); | |
907 | if (s->fd < 0) { | |
908 | s->fd_error_time = get_clock(); | |
909 | s->fd_got_error = 1; | |
910 | if (last_media_present) | |
911 | s->fd_media_changed = 1; | |
912 | #ifdef DEBUG_FLOPPY | |
913 | printf("No floppy\n"); | |
914 | #endif | |
915 | return -EIO; | |
916 | } | |
917 | #ifdef DEBUG_FLOPPY | |
918 | printf("Floppy opened\n"); | |
919 | #endif | |
920 | } | |
921 | if (!last_media_present) | |
922 | s->fd_media_changed = 1; | |
923 | s->fd_open_time = get_clock(); | |
924 | s->fd_got_error = 0; | |
925 | return 0; | |
926 | } | |
927 | ||
928 | static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
929 | { | |
930 | BDRVRawState *s = bs->opaque; | |
931 | ||
932 | return ioctl(s->fd, req, buf); | |
933 | } | |
934 | ||
935 | static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs, | |
936 | unsigned long int req, void *buf, | |
937 | BlockDriverCompletionFunc *cb, void *opaque) | |
938 | { | |
939 | BDRVRawState *s = bs->opaque; | |
940 | ||
941 | if (fd_open(bs) < 0) | |
942 | return NULL; | |
943 | return paio_ioctl(bs, s->fd, req, buf, cb, opaque); | |
944 | } | |
945 | ||
946 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) | |
947 | static int fd_open(BlockDriverState *bs) | |
948 | { | |
949 | BDRVRawState *s = bs->opaque; | |
950 | ||
951 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
952 | if (s->fd >= 0) | |
953 | return 0; | |
954 | return -EIO; | |
955 | } | |
956 | #else /* !linux && !FreeBSD */ | |
957 | ||
958 | static int fd_open(BlockDriverState *bs) | |
959 | { | |
960 | return 0; | |
961 | } | |
962 | ||
963 | #endif /* !linux && !FreeBSD */ | |
964 | ||
965 | static int hdev_create(const char *filename, QEMUOptionParameter *options) | |
966 | { | |
967 | int fd; | |
968 | int ret = 0; | |
969 | struct stat stat_buf; | |
970 | int64_t total_size = 0; | |
971 | ||
972 | /* Read out options */ | |
973 | while (options && options->name) { | |
974 | if (!strcmp(options->name, "size")) { | |
975 | total_size = options->value.n / BDRV_SECTOR_SIZE; | |
976 | } | |
977 | options++; | |
978 | } | |
979 | ||
980 | fd = open(filename, O_WRONLY | O_BINARY); | |
981 | if (fd < 0) | |
982 | return -errno; | |
983 | ||
984 | if (fstat(fd, &stat_buf) < 0) | |
985 | ret = -errno; | |
986 | else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) | |
987 | ret = -ENODEV; | |
988 | else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) | |
989 | ret = -ENOSPC; | |
990 | ||
991 | close(fd); | |
992 | return ret; | |
993 | } | |
994 | ||
995 | static int hdev_has_zero_init(BlockDriverState *bs) | |
996 | { | |
997 | return 0; | |
998 | } | |
999 | ||
1000 | static BlockDriver bdrv_host_device = { | |
1001 | .format_name = "host_device", | |
1002 | .protocol_name = "host_device", | |
1003 | .instance_size = sizeof(BDRVRawState), | |
1004 | .bdrv_probe_device = hdev_probe_device, | |
1005 | .bdrv_file_open = hdev_open, | |
1006 | .bdrv_close = raw_close, | |
1007 | .bdrv_create = hdev_create, | |
1008 | .create_options = raw_create_options, | |
1009 | .bdrv_has_zero_init = hdev_has_zero_init, | |
1010 | ||
1011 | .bdrv_aio_readv = raw_aio_readv, | |
1012 | .bdrv_aio_writev = raw_aio_writev, | |
1013 | .bdrv_aio_flush = raw_aio_flush, | |
1014 | ||
1015 | .bdrv_truncate = raw_truncate, | |
1016 | .bdrv_getlength = raw_getlength, | |
1017 | .bdrv_get_allocated_file_size | |
1018 | = raw_get_allocated_file_size, | |
1019 | ||
1020 | /* generic scsi device */ | |
1021 | #ifdef __linux__ | |
1022 | .bdrv_ioctl = hdev_ioctl, | |
1023 | .bdrv_aio_ioctl = hdev_aio_ioctl, | |
1024 | #endif | |
1025 | }; | |
1026 | ||
1027 | #ifdef __linux__ | |
1028 | static int floppy_open(BlockDriverState *bs, const char *filename, int flags) | |
1029 | { | |
1030 | BDRVRawState *s = bs->opaque; | |
1031 | int ret; | |
1032 | ||
1033 | s->type = FTYPE_FD; | |
1034 | ||
1035 | /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ | |
1036 | ret = raw_open_common(bs, filename, flags, O_NONBLOCK); | |
1037 | if (ret) | |
1038 | return ret; | |
1039 | ||
1040 | /* close fd so that we can reopen it as needed */ | |
1041 | close(s->fd); | |
1042 | s->fd = -1; | |
1043 | s->fd_media_changed = 1; | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static int floppy_probe_device(const char *filename) | |
1049 | { | |
1050 | int fd, ret; | |
1051 | int prio = 0; | |
1052 | struct floppy_struct fdparam; | |
1053 | struct stat st; | |
1054 | ||
1055 | if (strstart(filename, "/dev/fd", NULL) && | |
1056 | !strstart(filename, "/dev/fdset/", NULL)) { | |
1057 | prio = 50; | |
1058 | } | |
1059 | ||
1060 | fd = open(filename, O_RDONLY | O_NONBLOCK); | |
1061 | if (fd < 0) { | |
1062 | goto out; | |
1063 | } | |
1064 | ret = fstat(fd, &st); | |
1065 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
1066 | goto outc; | |
1067 | } | |
1068 | ||
1069 | /* Attempt to detect via a floppy specific ioctl */ | |
1070 | ret = ioctl(fd, FDGETPRM, &fdparam); | |
1071 | if (ret >= 0) | |
1072 | prio = 100; | |
1073 | ||
1074 | outc: | |
1075 | close(fd); | |
1076 | out: | |
1077 | return prio; | |
1078 | } | |
1079 | ||
1080 | ||
1081 | static int floppy_is_inserted(BlockDriverState *bs) | |
1082 | { | |
1083 | return fd_open(bs) >= 0; | |
1084 | } | |
1085 | ||
1086 | static int floppy_media_changed(BlockDriverState *bs) | |
1087 | { | |
1088 | BDRVRawState *s = bs->opaque; | |
1089 | int ret; | |
1090 | ||
1091 | /* | |
1092 | * XXX: we do not have a true media changed indication. | |
1093 | * It does not work if the floppy is changed without trying to read it. | |
1094 | */ | |
1095 | fd_open(bs); | |
1096 | ret = s->fd_media_changed; | |
1097 | s->fd_media_changed = 0; | |
1098 | #ifdef DEBUG_FLOPPY | |
1099 | printf("Floppy changed=%d\n", ret); | |
1100 | #endif | |
1101 | return ret; | |
1102 | } | |
1103 | ||
1104 | static void floppy_eject(BlockDriverState *bs, bool eject_flag) | |
1105 | { | |
1106 | BDRVRawState *s = bs->opaque; | |
1107 | int fd; | |
1108 | ||
1109 | if (s->fd >= 0) { | |
1110 | close(s->fd); | |
1111 | s->fd = -1; | |
1112 | } | |
1113 | fd = open(bs->filename, s->open_flags | O_NONBLOCK); | |
1114 | if (fd >= 0) { | |
1115 | if (ioctl(fd, FDEJECT, 0) < 0) | |
1116 | perror("FDEJECT"); | |
1117 | close(fd); | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | static BlockDriver bdrv_host_floppy = { | |
1122 | .format_name = "host_floppy", | |
1123 | .protocol_name = "host_floppy", | |
1124 | .instance_size = sizeof(BDRVRawState), | |
1125 | .bdrv_probe_device = floppy_probe_device, | |
1126 | .bdrv_file_open = floppy_open, | |
1127 | .bdrv_close = raw_close, | |
1128 | .bdrv_create = hdev_create, | |
1129 | .create_options = raw_create_options, | |
1130 | .bdrv_has_zero_init = hdev_has_zero_init, | |
1131 | ||
1132 | .bdrv_aio_readv = raw_aio_readv, | |
1133 | .bdrv_aio_writev = raw_aio_writev, | |
1134 | .bdrv_aio_flush = raw_aio_flush, | |
1135 | ||
1136 | .bdrv_truncate = raw_truncate, | |
1137 | .bdrv_getlength = raw_getlength, | |
1138 | .bdrv_get_allocated_file_size | |
1139 | = raw_get_allocated_file_size, | |
1140 | ||
1141 | /* removable device support */ | |
1142 | .bdrv_is_inserted = floppy_is_inserted, | |
1143 | .bdrv_media_changed = floppy_media_changed, | |
1144 | .bdrv_eject = floppy_eject, | |
1145 | }; | |
1146 | ||
1147 | static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) | |
1148 | { | |
1149 | BDRVRawState *s = bs->opaque; | |
1150 | ||
1151 | s->type = FTYPE_CD; | |
1152 | ||
1153 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ | |
1154 | return raw_open_common(bs, filename, flags, O_NONBLOCK); | |
1155 | } | |
1156 | ||
1157 | static int cdrom_probe_device(const char *filename) | |
1158 | { | |
1159 | int fd, ret; | |
1160 | int prio = 0; | |
1161 | struct stat st; | |
1162 | ||
1163 | fd = open(filename, O_RDONLY | O_NONBLOCK); | |
1164 | if (fd < 0) { | |
1165 | goto out; | |
1166 | } | |
1167 | ret = fstat(fd, &st); | |
1168 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
1169 | goto outc; | |
1170 | } | |
1171 | ||
1172 | /* Attempt to detect via a CDROM specific ioctl */ | |
1173 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
1174 | if (ret >= 0) | |
1175 | prio = 100; | |
1176 | ||
1177 | outc: | |
1178 | close(fd); | |
1179 | out: | |
1180 | return prio; | |
1181 | } | |
1182 | ||
1183 | static int cdrom_is_inserted(BlockDriverState *bs) | |
1184 | { | |
1185 | BDRVRawState *s = bs->opaque; | |
1186 | int ret; | |
1187 | ||
1188 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
1189 | if (ret == CDS_DISC_OK) | |
1190 | return 1; | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) | |
1195 | { | |
1196 | BDRVRawState *s = bs->opaque; | |
1197 | ||
1198 | if (eject_flag) { | |
1199 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
1200 | perror("CDROMEJECT"); | |
1201 | } else { | |
1202 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
1203 | perror("CDROMEJECT"); | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) | |
1208 | { | |
1209 | BDRVRawState *s = bs->opaque; | |
1210 | ||
1211 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
1212 | /* | |
1213 | * Note: an error can happen if the distribution automatically | |
1214 | * mounts the CD-ROM | |
1215 | */ | |
1216 | /* perror("CDROM_LOCKDOOR"); */ | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | static BlockDriver bdrv_host_cdrom = { | |
1221 | .format_name = "host_cdrom", | |
1222 | .protocol_name = "host_cdrom", | |
1223 | .instance_size = sizeof(BDRVRawState), | |
1224 | .bdrv_probe_device = cdrom_probe_device, | |
1225 | .bdrv_file_open = cdrom_open, | |
1226 | .bdrv_close = raw_close, | |
1227 | .bdrv_create = hdev_create, | |
1228 | .create_options = raw_create_options, | |
1229 | .bdrv_has_zero_init = hdev_has_zero_init, | |
1230 | ||
1231 | .bdrv_aio_readv = raw_aio_readv, | |
1232 | .bdrv_aio_writev = raw_aio_writev, | |
1233 | .bdrv_aio_flush = raw_aio_flush, | |
1234 | ||
1235 | .bdrv_truncate = raw_truncate, | |
1236 | .bdrv_getlength = raw_getlength, | |
1237 | .bdrv_get_allocated_file_size | |
1238 | = raw_get_allocated_file_size, | |
1239 | ||
1240 | /* removable device support */ | |
1241 | .bdrv_is_inserted = cdrom_is_inserted, | |
1242 | .bdrv_eject = cdrom_eject, | |
1243 | .bdrv_lock_medium = cdrom_lock_medium, | |
1244 | ||
1245 | /* generic scsi device */ | |
1246 | .bdrv_ioctl = hdev_ioctl, | |
1247 | .bdrv_aio_ioctl = hdev_aio_ioctl, | |
1248 | }; | |
1249 | #endif /* __linux__ */ | |
1250 | ||
1251 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) | |
1252 | static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) | |
1253 | { | |
1254 | BDRVRawState *s = bs->opaque; | |
1255 | int ret; | |
1256 | ||
1257 | s->type = FTYPE_CD; | |
1258 | ||
1259 | ret = raw_open_common(bs, filename, flags, 0); | |
1260 | if (ret) | |
1261 | return ret; | |
1262 | ||
1263 | /* make sure the door isn't locked at this time */ | |
1264 | ioctl(s->fd, CDIOCALLOW); | |
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | static int cdrom_probe_device(const char *filename) | |
1269 | { | |
1270 | if (strstart(filename, "/dev/cd", NULL) || | |
1271 | strstart(filename, "/dev/acd", NULL)) | |
1272 | return 100; | |
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | static int cdrom_reopen(BlockDriverState *bs) | |
1277 | { | |
1278 | BDRVRawState *s = bs->opaque; | |
1279 | int fd; | |
1280 | ||
1281 | /* | |
1282 | * Force reread of possibly changed/newly loaded disc, | |
1283 | * FreeBSD seems to not notice sometimes... | |
1284 | */ | |
1285 | if (s->fd >= 0) | |
1286 | close(s->fd); | |
1287 | fd = open(bs->filename, s->open_flags, 0644); | |
1288 | if (fd < 0) { | |
1289 | s->fd = -1; | |
1290 | return -EIO; | |
1291 | } | |
1292 | s->fd = fd; | |
1293 | ||
1294 | /* make sure the door isn't locked at this time */ | |
1295 | ioctl(s->fd, CDIOCALLOW); | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | static int cdrom_is_inserted(BlockDriverState *bs) | |
1300 | { | |
1301 | return raw_getlength(bs) > 0; | |
1302 | } | |
1303 | ||
1304 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) | |
1305 | { | |
1306 | BDRVRawState *s = bs->opaque; | |
1307 | ||
1308 | if (s->fd < 0) | |
1309 | return; | |
1310 | ||
1311 | (void) ioctl(s->fd, CDIOCALLOW); | |
1312 | ||
1313 | if (eject_flag) { | |
1314 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
1315 | perror("CDIOCEJECT"); | |
1316 | } else { | |
1317 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
1318 | perror("CDIOCCLOSE"); | |
1319 | } | |
1320 | ||
1321 | cdrom_reopen(bs); | |
1322 | } | |
1323 | ||
1324 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) | |
1325 | { | |
1326 | BDRVRawState *s = bs->opaque; | |
1327 | ||
1328 | if (s->fd < 0) | |
1329 | return; | |
1330 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { | |
1331 | /* | |
1332 | * Note: an error can happen if the distribution automatically | |
1333 | * mounts the CD-ROM | |
1334 | */ | |
1335 | /* perror("CDROM_LOCKDOOR"); */ | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | static BlockDriver bdrv_host_cdrom = { | |
1340 | .format_name = "host_cdrom", | |
1341 | .protocol_name = "host_cdrom", | |
1342 | .instance_size = sizeof(BDRVRawState), | |
1343 | .bdrv_probe_device = cdrom_probe_device, | |
1344 | .bdrv_file_open = cdrom_open, | |
1345 | .bdrv_close = raw_close, | |
1346 | .bdrv_create = hdev_create, | |
1347 | .create_options = raw_create_options, | |
1348 | .bdrv_has_zero_init = hdev_has_zero_init, | |
1349 | ||
1350 | .bdrv_aio_readv = raw_aio_readv, | |
1351 | .bdrv_aio_writev = raw_aio_writev, | |
1352 | .bdrv_aio_flush = raw_aio_flush, | |
1353 | ||
1354 | .bdrv_truncate = raw_truncate, | |
1355 | .bdrv_getlength = raw_getlength, | |
1356 | .bdrv_get_allocated_file_size | |
1357 | = raw_get_allocated_file_size, | |
1358 | ||
1359 | /* removable device support */ | |
1360 | .bdrv_is_inserted = cdrom_is_inserted, | |
1361 | .bdrv_eject = cdrom_eject, | |
1362 | .bdrv_lock_medium = cdrom_lock_medium, | |
1363 | }; | |
1364 | #endif /* __FreeBSD__ */ | |
1365 | ||
1366 | static void bdrv_file_init(void) | |
1367 | { | |
1368 | /* | |
1369 | * Register all the drivers. Note that order is important, the driver | |
1370 | * registered last will get probed first. | |
1371 | */ | |
1372 | bdrv_register(&bdrv_file); | |
1373 | bdrv_register(&bdrv_host_device); | |
1374 | #ifdef __linux__ | |
1375 | bdrv_register(&bdrv_host_floppy); | |
1376 | bdrv_register(&bdrv_host_cdrom); | |
1377 | #endif | |
1378 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) | |
1379 | bdrv_register(&bdrv_host_cdrom); | |
1380 | #endif | |
1381 | } | |
1382 | ||
1383 | block_init(bdrv_file_init); |