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Commit | Line | Data |
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83f64091 | 1 | /* |
223d4670 | 2 | * Block driver for RAW files (posix) |
5fafdf24 | 3 | * |
83f64091 | 4 | * Copyright (c) 2006 Fabrice Bellard |
5fafdf24 | 5 | * |
83f64091 FB |
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 | */ | |
faf07963 | 24 | #include "qemu-common.h" |
87ecb68b | 25 | #include "qemu-timer.h" |
baf35cb9 | 26 | #include "qemu-char.h" |
0bf9e31a | 27 | #include "qemu-log.h" |
83f64091 | 28 | #include "block_int.h" |
5efa9d5a | 29 | #include "module.h" |
de81a169 PB |
30 | #include "trace.h" |
31 | #include "thread-pool.h" | |
32 | #include "iov.h" | |
9f8540ec | 33 | #include "raw-aio.h" |
83f64091 | 34 | |
83affaa6 | 35 | #if defined(__APPLE__) && (__MACH__) |
83f64091 FB |
36 | #include <paths.h> |
37 | #include <sys/param.h> | |
38 | #include <IOKit/IOKitLib.h> | |
39 | #include <IOKit/IOBSD.h> | |
40 | #include <IOKit/storage/IOMediaBSDClient.h> | |
41 | #include <IOKit/storage/IOMedia.h> | |
42 | #include <IOKit/storage/IOCDMedia.h> | |
43 | //#include <IOKit/storage/IOCDTypes.h> | |
44 | #include <CoreFoundation/CoreFoundation.h> | |
45 | #endif | |
46 | ||
47 | #ifdef __sun__ | |
2e9671da | 48 | #define _POSIX_PTHREAD_SEMANTICS 1 |
83f64091 FB |
49 | #include <sys/dkio.h> |
50 | #endif | |
19cb3738 | 51 | #ifdef __linux__ |
343f8568 JS |
52 | #include <sys/types.h> |
53 | #include <sys/stat.h> | |
19cb3738 | 54 | #include <sys/ioctl.h> |
05acda4d | 55 | #include <sys/param.h> |
19cb3738 FB |
56 | #include <linux/cdrom.h> |
57 | #include <linux/fd.h> | |
5500316d PB |
58 | #include <linux/fs.h> |
59 | #endif | |
60 | #ifdef CONFIG_FIEMAP | |
61 | #include <linux/fiemap.h> | |
19cb3738 | 62 | #endif |
a167ba50 | 63 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
1cb6c3fd | 64 | #include <sys/disk.h> |
9f23011a | 65 | #include <sys/cdio.h> |
1cb6c3fd | 66 | #endif |
83f64091 | 67 | |
128ab2ff BS |
68 | #ifdef __OpenBSD__ |
69 | #include <sys/ioctl.h> | |
70 | #include <sys/disklabel.h> | |
71 | #include <sys/dkio.h> | |
72 | #endif | |
73 | ||
d1f6fd8d CE |
74 | #ifdef __NetBSD__ |
75 | #include <sys/ioctl.h> | |
76 | #include <sys/disklabel.h> | |
77 | #include <sys/dkio.h> | |
78 | #include <sys/disk.h> | |
79 | #endif | |
80 | ||
c5e97233 BS |
81 | #ifdef __DragonFly__ |
82 | #include <sys/ioctl.h> | |
83 | #include <sys/diskslice.h> | |
84 | #endif | |
85 | ||
dce512de CH |
86 | #ifdef CONFIG_XFS |
87 | #include <xfs/xfs.h> | |
88 | #endif | |
89 | ||
19cb3738 | 90 | //#define DEBUG_FLOPPY |
83f64091 | 91 | |
faf07963 | 92 | //#define DEBUG_BLOCK |
03ff3ca3 | 93 | #if defined(DEBUG_BLOCK) |
001faf32 BS |
94 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ |
95 | { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) | |
8c05dbf9 | 96 | #else |
001faf32 | 97 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) |
8c05dbf9 TS |
98 | #endif |
99 | ||
f6465578 AL |
100 | /* OS X does not have O_DSYNC */ |
101 | #ifndef O_DSYNC | |
1c27a8b3 | 102 | #ifdef O_SYNC |
7ab064d2 | 103 | #define O_DSYNC O_SYNC |
1c27a8b3 JA |
104 | #elif defined(O_FSYNC) |
105 | #define O_DSYNC O_FSYNC | |
106 | #endif | |
f6465578 AL |
107 | #endif |
108 | ||
9f7965c7 AL |
109 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
110 | #ifndef O_DIRECT | |
111 | #define O_DIRECT O_DSYNC | |
112 | #endif | |
113 | ||
19cb3738 FB |
114 | #define FTYPE_FILE 0 |
115 | #define FTYPE_CD 1 | |
116 | #define FTYPE_FD 2 | |
83f64091 | 117 | |
c57c846a | 118 | /* if the FD is not accessed during that time (in ns), we try to |
19cb3738 | 119 | reopen it to see if the disk has been changed */ |
c57c846a | 120 | #define FD_OPEN_TIMEOUT (1000000000) |
83f64091 | 121 | |
581b9e29 CH |
122 | #define MAX_BLOCKSIZE 4096 |
123 | ||
19cb3738 FB |
124 | typedef struct BDRVRawState { |
125 | int fd; | |
126 | int type; | |
0e1d8f4c | 127 | int open_flags; |
19cb3738 FB |
128 | #if defined(__linux__) |
129 | /* linux floppy specific */ | |
19cb3738 FB |
130 | int64_t fd_open_time; |
131 | int64_t fd_error_time; | |
132 | int fd_got_error; | |
133 | int fd_media_changed; | |
83f64091 | 134 | #endif |
e44bd6fc | 135 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c | 136 | int use_aio; |
1e5b9d2f | 137 | void *aio_ctx; |
e44bd6fc | 138 | #endif |
dce512de CH |
139 | #ifdef CONFIG_XFS |
140 | bool is_xfs : 1; | |
141 | #endif | |
19cb3738 FB |
142 | } BDRVRawState; |
143 | ||
eeb6b45d JC |
144 | typedef struct BDRVRawReopenState { |
145 | int fd; | |
146 | int open_flags; | |
147 | #ifdef CONFIG_LINUX_AIO | |
148 | int use_aio; | |
149 | #endif | |
150 | } BDRVRawReopenState; | |
151 | ||
19cb3738 | 152 | static int fd_open(BlockDriverState *bs); |
22afa7b5 | 153 | static int64_t raw_getlength(BlockDriverState *bs); |
83f64091 | 154 | |
de81a169 PB |
155 | typedef struct RawPosixAIOData { |
156 | BlockDriverState *bs; | |
157 | int aio_fildes; | |
158 | union { | |
159 | struct iovec *aio_iov; | |
160 | void *aio_ioctl_buf; | |
161 | }; | |
162 | int aio_niov; | |
163 | size_t aio_nbytes; | |
164 | #define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */ | |
165 | off_t aio_offset; | |
166 | int aio_type; | |
167 | } RawPosixAIOData; | |
168 | ||
a167ba50 | 169 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 | 170 | static int cdrom_reopen(BlockDriverState *bs); |
9f23011a BS |
171 | #endif |
172 | ||
1de1ae0a CE |
173 | #if defined(__NetBSD__) |
174 | static int raw_normalize_devicepath(const char **filename) | |
175 | { | |
176 | static char namebuf[PATH_MAX]; | |
177 | const char *dp, *fname; | |
178 | struct stat sb; | |
179 | ||
180 | fname = *filename; | |
181 | dp = strrchr(fname, '/'); | |
182 | if (lstat(fname, &sb) < 0) { | |
183 | fprintf(stderr, "%s: stat failed: %s\n", | |
184 | fname, strerror(errno)); | |
185 | return -errno; | |
186 | } | |
187 | ||
188 | if (!S_ISBLK(sb.st_mode)) { | |
189 | return 0; | |
190 | } | |
191 | ||
192 | if (dp == NULL) { | |
193 | snprintf(namebuf, PATH_MAX, "r%s", fname); | |
194 | } else { | |
195 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", | |
196 | (int)(dp - fname), fname, dp + 1); | |
197 | } | |
198 | fprintf(stderr, "%s is a block device", fname); | |
199 | *filename = namebuf; | |
200 | fprintf(stderr, ", using %s\n", *filename); | |
201 | ||
202 | return 0; | |
203 | } | |
204 | #else | |
205 | static int raw_normalize_devicepath(const char **filename) | |
206 | { | |
207 | return 0; | |
208 | } | |
209 | #endif | |
210 | ||
6a8dc042 JC |
211 | static void raw_parse_flags(int bdrv_flags, int *open_flags) |
212 | { | |
213 | assert(open_flags != NULL); | |
214 | ||
215 | *open_flags |= O_BINARY; | |
216 | *open_flags &= ~O_ACCMODE; | |
217 | if (bdrv_flags & BDRV_O_RDWR) { | |
218 | *open_flags |= O_RDWR; | |
219 | } else { | |
220 | *open_flags |= O_RDONLY; | |
221 | } | |
222 | ||
223 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
224 | * and O_DIRECT for no caching. */ | |
225 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
226 | *open_flags |= O_DIRECT; | |
227 | } | |
6a8dc042 JC |
228 | } |
229 | ||
fc32a72d JC |
230 | #ifdef CONFIG_LINUX_AIO |
231 | static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) | |
232 | { | |
233 | int ret = -1; | |
234 | assert(aio_ctx != NULL); | |
235 | assert(use_aio != NULL); | |
236 | /* | |
237 | * Currently Linux do AIO only for files opened with O_DIRECT | |
238 | * specified so check NOCACHE flag too | |
239 | */ | |
240 | if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) == | |
241 | (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { | |
242 | ||
243 | /* if non-NULL, laio_init() has already been run */ | |
244 | if (*aio_ctx == NULL) { | |
245 | *aio_ctx = laio_init(); | |
246 | if (!*aio_ctx) { | |
247 | goto error; | |
248 | } | |
249 | } | |
250 | *use_aio = 1; | |
251 | } else { | |
252 | *use_aio = 0; | |
253 | } | |
254 | ||
255 | ret = 0; | |
256 | ||
257 | error: | |
258 | return ret; | |
259 | } | |
260 | #endif | |
261 | ||
90babde0 | 262 | static int raw_open_common(BlockDriverState *bs, const char *filename, |
19a3da7f | 263 | int bdrv_flags, int open_flags) |
83f64091 FB |
264 | { |
265 | BDRVRawState *s = bs->opaque; | |
0e1d8f4c | 266 | int fd, ret; |
83f64091 | 267 | |
1de1ae0a CE |
268 | ret = raw_normalize_devicepath(&filename); |
269 | if (ret != 0) { | |
270 | return ret; | |
271 | } | |
272 | ||
6a8dc042 JC |
273 | s->open_flags = open_flags; |
274 | raw_parse_flags(bdrv_flags, &s->open_flags); | |
83f64091 | 275 | |
90babde0 | 276 | s->fd = -1; |
40ff6d7e | 277 | fd = qemu_open(filename, s->open_flags, 0644); |
19cb3738 FB |
278 | if (fd < 0) { |
279 | ret = -errno; | |
280 | if (ret == -EROFS) | |
281 | ret = -EACCES; | |
282 | return ret; | |
283 | } | |
83f64091 | 284 | s->fd = fd; |
9ef91a67 | 285 | |
5c6c3a6c | 286 | #ifdef CONFIG_LINUX_AIO |
fc32a72d | 287 | if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) { |
47e6b251 PB |
288 | qemu_close(fd); |
289 | return -errno; | |
9ef91a67 | 290 | } |
fc32a72d | 291 | #endif |
9ef91a67 | 292 | |
dce512de CH |
293 | #ifdef CONFIG_XFS |
294 | if (platform_test_xfs_fd(s->fd)) { | |
295 | s->is_xfs = 1; | |
296 | } | |
297 | #endif | |
298 | ||
83f64091 FB |
299 | return 0; |
300 | } | |
301 | ||
90babde0 CH |
302 | static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
303 | { | |
304 | BDRVRawState *s = bs->opaque; | |
305 | ||
306 | s->type = FTYPE_FILE; | |
9a2d77ad | 307 | return raw_open_common(bs, filename, flags, 0); |
90babde0 CH |
308 | } |
309 | ||
eeb6b45d JC |
310 | static int raw_reopen_prepare(BDRVReopenState *state, |
311 | BlockReopenQueue *queue, Error **errp) | |
312 | { | |
313 | BDRVRawState *s; | |
314 | BDRVRawReopenState *raw_s; | |
315 | int ret = 0; | |
316 | ||
317 | assert(state != NULL); | |
318 | assert(state->bs != NULL); | |
319 | ||
320 | s = state->bs->opaque; | |
321 | ||
322 | state->opaque = g_malloc0(sizeof(BDRVRawReopenState)); | |
323 | raw_s = state->opaque; | |
324 | ||
325 | #ifdef CONFIG_LINUX_AIO | |
326 | raw_s->use_aio = s->use_aio; | |
327 | ||
328 | /* we can use s->aio_ctx instead of a copy, because the use_aio flag is | |
329 | * valid in the 'false' condition even if aio_ctx is set, and raw_set_aio() | |
330 | * won't override aio_ctx if aio_ctx is non-NULL */ | |
331 | if (raw_set_aio(&s->aio_ctx, &raw_s->use_aio, state->flags)) { | |
332 | return -1; | |
333 | } | |
334 | #endif | |
335 | ||
336 | raw_parse_flags(state->flags, &raw_s->open_flags); | |
337 | ||
338 | raw_s->fd = -1; | |
339 | ||
340 | int fcntl_flags = O_APPEND | O_ASYNC | O_NONBLOCK; | |
341 | #ifdef O_NOATIME | |
342 | fcntl_flags |= O_NOATIME; | |
343 | #endif | |
344 | ||
345 | if ((raw_s->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { | |
346 | /* dup the original fd */ | |
347 | /* TODO: use qemu fcntl wrapper */ | |
348 | #ifdef F_DUPFD_CLOEXEC | |
349 | raw_s->fd = fcntl(s->fd, F_DUPFD_CLOEXEC, 0); | |
350 | #else | |
351 | raw_s->fd = dup(s->fd); | |
352 | if (raw_s->fd != -1) { | |
353 | qemu_set_cloexec(raw_s->fd); | |
354 | } | |
355 | #endif | |
356 | if (raw_s->fd >= 0) { | |
357 | ret = fcntl_setfl(raw_s->fd, raw_s->open_flags); | |
358 | if (ret) { | |
359 | qemu_close(raw_s->fd); | |
360 | raw_s->fd = -1; | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ | |
366 | if (raw_s->fd == -1) { | |
367 | assert(!(raw_s->open_flags & O_CREAT)); | |
368 | raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags); | |
369 | if (raw_s->fd == -1) { | |
370 | ret = -1; | |
371 | } | |
372 | } | |
373 | return ret; | |
374 | } | |
375 | ||
376 | ||
377 | static void raw_reopen_commit(BDRVReopenState *state) | |
378 | { | |
379 | BDRVRawReopenState *raw_s = state->opaque; | |
380 | BDRVRawState *s = state->bs->opaque; | |
381 | ||
382 | s->open_flags = raw_s->open_flags; | |
383 | ||
384 | qemu_close(s->fd); | |
385 | s->fd = raw_s->fd; | |
386 | #ifdef CONFIG_LINUX_AIO | |
387 | s->use_aio = raw_s->use_aio; | |
388 | #endif | |
389 | ||
390 | g_free(state->opaque); | |
391 | state->opaque = NULL; | |
392 | } | |
393 | ||
394 | ||
395 | static void raw_reopen_abort(BDRVReopenState *state) | |
396 | { | |
397 | BDRVRawReopenState *raw_s = state->opaque; | |
398 | ||
399 | /* nothing to do if NULL, we didn't get far enough */ | |
400 | if (raw_s == NULL) { | |
401 | return; | |
402 | } | |
403 | ||
404 | if (raw_s->fd >= 0) { | |
405 | qemu_close(raw_s->fd); | |
406 | raw_s->fd = -1; | |
407 | } | |
408 | g_free(state->opaque); | |
409 | state->opaque = NULL; | |
410 | } | |
411 | ||
412 | ||
83f64091 FB |
413 | /* XXX: use host sector size if necessary with: |
414 | #ifdef DIOCGSECTORSIZE | |
415 | { | |
416 | unsigned int sectorsize = 512; | |
417 | if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) && | |
418 | sectorsize > bufsize) | |
419 | bufsize = sectorsize; | |
420 | } | |
421 | #endif | |
422 | #ifdef CONFIG_COCOA | |
2ee9fb48 | 423 | uint32_t blockSize = 512; |
83f64091 FB |
424 | if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) { |
425 | bufsize = blockSize; | |
426 | } | |
427 | #endif | |
428 | */ | |
429 | ||
9ef91a67 CH |
430 | /* |
431 | * Check if all memory in this vector is sector aligned. | |
432 | */ | |
581b9e29 | 433 | static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov) |
a76bab49 | 434 | { |
9ef91a67 | 435 | int i; |
83f64091 | 436 | |
9ef91a67 | 437 | for (i = 0; i < qiov->niov; i++) { |
581b9e29 | 438 | if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) { |
9ef91a67 | 439 | return 0; |
c16b5a2c | 440 | } |
c16b5a2c | 441 | } |
c16b5a2c | 442 | |
9ef91a67 | 443 | return 1; |
c16b5a2c CH |
444 | } |
445 | ||
de81a169 PB |
446 | static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb) |
447 | { | |
448 | int ret; | |
449 | ||
450 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); | |
451 | if (ret == -1) { | |
452 | return -errno; | |
453 | } | |
454 | ||
455 | /* | |
456 | * This looks weird, but the aio code only considers a request | |
457 | * successful if it has written the full number of bytes. | |
458 | * | |
459 | * Now we overload aio_nbytes as aio_ioctl_cmd for the ioctl command, | |
460 | * so in fact we return the ioctl command here to make posix_aio_read() | |
461 | * happy.. | |
462 | */ | |
463 | return aiocb->aio_nbytes; | |
464 | } | |
465 | ||
466 | static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb) | |
467 | { | |
468 | int ret; | |
469 | ||
470 | ret = qemu_fdatasync(aiocb->aio_fildes); | |
471 | if (ret == -1) { | |
472 | return -errno; | |
473 | } | |
474 | return 0; | |
475 | } | |
476 | ||
477 | #ifdef CONFIG_PREADV | |
478 | ||
479 | static bool preadv_present = true; | |
480 | ||
481 | static ssize_t | |
482 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
483 | { | |
484 | return preadv(fd, iov, nr_iov, offset); | |
485 | } | |
486 | ||
487 | static ssize_t | |
488 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
489 | { | |
490 | return pwritev(fd, iov, nr_iov, offset); | |
491 | } | |
492 | ||
493 | #else | |
494 | ||
495 | static bool preadv_present = false; | |
496 | ||
497 | static ssize_t | |
498 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
499 | { | |
500 | return -ENOSYS; | |
501 | } | |
502 | ||
503 | static ssize_t | |
504 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
505 | { | |
506 | return -ENOSYS; | |
507 | } | |
508 | ||
509 | #endif | |
510 | ||
511 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) | |
512 | { | |
513 | ssize_t len; | |
514 | ||
515 | do { | |
516 | if (aiocb->aio_type & QEMU_AIO_WRITE) | |
517 | len = qemu_pwritev(aiocb->aio_fildes, | |
518 | aiocb->aio_iov, | |
519 | aiocb->aio_niov, | |
520 | aiocb->aio_offset); | |
521 | else | |
522 | len = qemu_preadv(aiocb->aio_fildes, | |
523 | aiocb->aio_iov, | |
524 | aiocb->aio_niov, | |
525 | aiocb->aio_offset); | |
526 | } while (len == -1 && errno == EINTR); | |
527 | ||
528 | if (len == -1) { | |
529 | return -errno; | |
530 | } | |
531 | return len; | |
532 | } | |
533 | ||
534 | /* | |
535 | * Read/writes the data to/from a given linear buffer. | |
536 | * | |
537 | * Returns the number of bytes handles or -errno in case of an error. Short | |
538 | * reads are only returned if the end of the file is reached. | |
539 | */ | |
540 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) | |
541 | { | |
542 | ssize_t offset = 0; | |
543 | ssize_t len; | |
544 | ||
545 | while (offset < aiocb->aio_nbytes) { | |
546 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
547 | len = pwrite(aiocb->aio_fildes, | |
548 | (const char *)buf + offset, | |
549 | aiocb->aio_nbytes - offset, | |
550 | aiocb->aio_offset + offset); | |
551 | } else { | |
552 | len = pread(aiocb->aio_fildes, | |
553 | buf + offset, | |
554 | aiocb->aio_nbytes - offset, | |
555 | aiocb->aio_offset + offset); | |
556 | } | |
557 | if (len == -1 && errno == EINTR) { | |
558 | continue; | |
559 | } else if (len == -1) { | |
560 | offset = -errno; | |
561 | break; | |
562 | } else if (len == 0) { | |
563 | break; | |
564 | } | |
565 | offset += len; | |
566 | } | |
567 | ||
568 | return offset; | |
569 | } | |
570 | ||
571 | static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) | |
572 | { | |
573 | ssize_t nbytes; | |
574 | char *buf; | |
575 | ||
576 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { | |
577 | /* | |
578 | * If there is just a single buffer, and it is properly aligned | |
579 | * we can just use plain pread/pwrite without any problems. | |
580 | */ | |
581 | if (aiocb->aio_niov == 1) { | |
582 | return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base); | |
583 | } | |
584 | /* | |
585 | * We have more than one iovec, and all are properly aligned. | |
586 | * | |
587 | * Try preadv/pwritev first and fall back to linearizing the | |
588 | * buffer if it's not supported. | |
589 | */ | |
590 | if (preadv_present) { | |
591 | nbytes = handle_aiocb_rw_vector(aiocb); | |
592 | if (nbytes == aiocb->aio_nbytes || | |
593 | (nbytes < 0 && nbytes != -ENOSYS)) { | |
594 | return nbytes; | |
595 | } | |
596 | preadv_present = false; | |
597 | } | |
598 | ||
599 | /* | |
600 | * XXX(hch): short read/write. no easy way to handle the reminder | |
601 | * using these interfaces. For now retry using plain | |
602 | * pread/pwrite? | |
603 | */ | |
604 | } | |
605 | ||
606 | /* | |
607 | * Ok, we have to do it the hard way, copy all segments into | |
608 | * a single aligned buffer. | |
609 | */ | |
610 | buf = qemu_blockalign(aiocb->bs, aiocb->aio_nbytes); | |
611 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
612 | char *p = buf; | |
613 | int i; | |
614 | ||
615 | for (i = 0; i < aiocb->aio_niov; ++i) { | |
616 | memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len); | |
617 | p += aiocb->aio_iov[i].iov_len; | |
618 | } | |
619 | } | |
620 | ||
621 | nbytes = handle_aiocb_rw_linear(aiocb, buf); | |
622 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { | |
623 | char *p = buf; | |
624 | size_t count = aiocb->aio_nbytes, copy; | |
625 | int i; | |
626 | ||
627 | for (i = 0; i < aiocb->aio_niov && count; ++i) { | |
628 | copy = count; | |
629 | if (copy > aiocb->aio_iov[i].iov_len) { | |
630 | copy = aiocb->aio_iov[i].iov_len; | |
631 | } | |
632 | memcpy(aiocb->aio_iov[i].iov_base, p, copy); | |
633 | p += copy; | |
634 | count -= copy; | |
635 | } | |
636 | } | |
637 | qemu_vfree(buf); | |
638 | ||
639 | return nbytes; | |
640 | } | |
641 | ||
642 | static int aio_worker(void *arg) | |
643 | { | |
644 | RawPosixAIOData *aiocb = arg; | |
645 | ssize_t ret = 0; | |
646 | ||
647 | switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) { | |
648 | case QEMU_AIO_READ: | |
649 | ret = handle_aiocb_rw(aiocb); | |
650 | if (ret >= 0 && ret < aiocb->aio_nbytes && aiocb->bs->growable) { | |
651 | iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret, | |
652 | 0, aiocb->aio_nbytes - ret); | |
653 | ||
654 | ret = aiocb->aio_nbytes; | |
655 | } | |
656 | if (ret == aiocb->aio_nbytes) { | |
657 | ret = 0; | |
658 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
659 | ret = -EINVAL; | |
660 | } | |
661 | break; | |
662 | case QEMU_AIO_WRITE: | |
663 | ret = handle_aiocb_rw(aiocb); | |
664 | if (ret == aiocb->aio_nbytes) { | |
665 | ret = 0; | |
666 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
667 | ret = -EINVAL; | |
668 | } | |
669 | break; | |
670 | case QEMU_AIO_FLUSH: | |
671 | ret = handle_aiocb_flush(aiocb); | |
672 | break; | |
673 | case QEMU_AIO_IOCTL: | |
674 | ret = handle_aiocb_ioctl(aiocb); | |
675 | break; | |
676 | default: | |
677 | fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); | |
678 | ret = -EINVAL; | |
679 | break; | |
680 | } | |
681 | ||
682 | g_slice_free(RawPosixAIOData, aiocb); | |
683 | return ret; | |
684 | } | |
685 | ||
686 | static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, | |
687 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
688 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
689 | { | |
690 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
691 | ||
692 | acb->bs = bs; | |
693 | acb->aio_type = type; | |
694 | acb->aio_fildes = fd; | |
695 | ||
696 | if (qiov) { | |
697 | acb->aio_iov = qiov->iov; | |
698 | acb->aio_niov = qiov->niov; | |
699 | } | |
700 | acb->aio_nbytes = nb_sectors * 512; | |
701 | acb->aio_offset = sector_num * 512; | |
702 | ||
703 | trace_paio_submit(acb, opaque, sector_num, nb_sectors, type); | |
704 | return thread_pool_submit_aio(aio_worker, acb, cb, opaque); | |
705 | } | |
706 | ||
707 | static BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd, | |
708 | unsigned long int req, void *buf, | |
709 | BlockDriverCompletionFunc *cb, void *opaque) | |
710 | { | |
711 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
712 | ||
713 | acb->bs = bs; | |
714 | acb->aio_type = QEMU_AIO_IOCTL; | |
715 | acb->aio_fildes = fd; | |
716 | acb->aio_offset = 0; | |
717 | acb->aio_ioctl_buf = buf; | |
718 | acb->aio_ioctl_cmd = req; | |
719 | ||
720 | return thread_pool_submit_aio(aio_worker, acb, cb, opaque); | |
721 | } | |
722 | ||
9ef91a67 CH |
723 | static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs, |
724 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
725 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
83f64091 | 726 | { |
ce1a14dc | 727 | BDRVRawState *s = bs->opaque; |
ce1a14dc | 728 | |
19cb3738 FB |
729 | if (fd_open(bs) < 0) |
730 | return NULL; | |
731 | ||
f141eafe AL |
732 | /* |
733 | * If O_DIRECT is used the buffer needs to be aligned on a sector | |
c1ee7d56 | 734 | * boundary. Check if this is the case or tell the low-level |
9ef91a67 | 735 | * driver that it needs to copy the buffer. |
f141eafe | 736 | */ |
9acc5a06 | 737 | if ((bs->open_flags & BDRV_O_NOCACHE)) { |
581b9e29 | 738 | if (!qiov_is_aligned(bs, qiov)) { |
5c6c3a6c | 739 | type |= QEMU_AIO_MISALIGNED; |
e44bd6fc | 740 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c CH |
741 | } else if (s->use_aio) { |
742 | return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, | |
e44bd6fc SW |
743 | nb_sectors, cb, opaque, type); |
744 | #endif | |
5c6c3a6c | 745 | } |
9ef91a67 | 746 | } |
f141eafe | 747 | |
1e5b9d2f | 748 | return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors, |
9ef91a67 | 749 | cb, opaque, type); |
83f64091 FB |
750 | } |
751 | ||
f141eafe AL |
752 | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, |
753 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 754 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 755 | { |
9ef91a67 CH |
756 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
757 | cb, opaque, QEMU_AIO_READ); | |
83f64091 FB |
758 | } |
759 | ||
f141eafe AL |
760 | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, |
761 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 762 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 763 | { |
9ef91a67 CH |
764 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
765 | cb, opaque, QEMU_AIO_WRITE); | |
83f64091 | 766 | } |
53538725 | 767 | |
b2e12bc6 CH |
768 | static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs, |
769 | BlockDriverCompletionFunc *cb, void *opaque) | |
770 | { | |
771 | BDRVRawState *s = bs->opaque; | |
772 | ||
773 | if (fd_open(bs) < 0) | |
774 | return NULL; | |
775 | ||
1e5b9d2f | 776 | return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
b2e12bc6 CH |
777 | } |
778 | ||
83f64091 FB |
779 | static void raw_close(BlockDriverState *bs) |
780 | { | |
781 | BDRVRawState *s = bs->opaque; | |
19cb3738 | 782 | if (s->fd >= 0) { |
2e1e79da | 783 | qemu_close(s->fd); |
19cb3738 FB |
784 | s->fd = -1; |
785 | } | |
83f64091 FB |
786 | } |
787 | ||
788 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
789 | { | |
790 | BDRVRawState *s = bs->opaque; | |
55b949c8 CH |
791 | struct stat st; |
792 | ||
793 | if (fstat(s->fd, &st)) { | |
83f64091 | 794 | return -errno; |
55b949c8 CH |
795 | } |
796 | ||
797 | if (S_ISREG(st.st_mode)) { | |
798 | if (ftruncate(s->fd, offset) < 0) { | |
799 | return -errno; | |
800 | } | |
801 | } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
802 | if (offset > raw_getlength(bs)) { | |
803 | return -EINVAL; | |
804 | } | |
805 | } else { | |
806 | return -ENOTSUP; | |
807 | } | |
808 | ||
83f64091 FB |
809 | return 0; |
810 | } | |
811 | ||
128ab2ff BS |
812 | #ifdef __OpenBSD__ |
813 | static int64_t raw_getlength(BlockDriverState *bs) | |
814 | { | |
815 | BDRVRawState *s = bs->opaque; | |
816 | int fd = s->fd; | |
817 | struct stat st; | |
818 | ||
819 | if (fstat(fd, &st)) | |
820 | return -1; | |
821 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
822 | struct disklabel dl; | |
823 | ||
824 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
825 | return -1; | |
826 | return (uint64_t)dl.d_secsize * | |
827 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
828 | } else | |
829 | return st.st_size; | |
830 | } | |
d1f6fd8d CE |
831 | #elif defined(__NetBSD__) |
832 | static int64_t raw_getlength(BlockDriverState *bs) | |
833 | { | |
834 | BDRVRawState *s = bs->opaque; | |
835 | int fd = s->fd; | |
836 | struct stat st; | |
837 | ||
838 | if (fstat(fd, &st)) | |
839 | return -1; | |
840 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
841 | struct dkwedge_info dkw; | |
842 | ||
843 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
844 | return dkw.dkw_size * 512; | |
845 | } else { | |
846 | struct disklabel dl; | |
847 | ||
848 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
849 | return -1; | |
850 | return (uint64_t)dl.d_secsize * | |
851 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
852 | } | |
853 | } else | |
854 | return st.st_size; | |
855 | } | |
50779cc2 CH |
856 | #elif defined(__sun__) |
857 | static int64_t raw_getlength(BlockDriverState *bs) | |
858 | { | |
859 | BDRVRawState *s = bs->opaque; | |
860 | struct dk_minfo minfo; | |
861 | int ret; | |
862 | ||
863 | ret = fd_open(bs); | |
864 | if (ret < 0) { | |
865 | return ret; | |
866 | } | |
867 | ||
868 | /* | |
869 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
870 | */ | |
871 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
872 | if (ret != -1) { | |
873 | return minfo.dki_lbsize * minfo.dki_capacity; | |
874 | } | |
875 | ||
876 | /* | |
877 | * There are reports that lseek on some devices fails, but | |
878 | * irc discussion said that contingency on contingency was overkill. | |
879 | */ | |
880 | return lseek(s->fd, 0, SEEK_END); | |
881 | } | |
882 | #elif defined(CONFIG_BSD) | |
883 | static int64_t raw_getlength(BlockDriverState *bs) | |
83f64091 FB |
884 | { |
885 | BDRVRawState *s = bs->opaque; | |
886 | int fd = s->fd; | |
887 | int64_t size; | |
83f64091 | 888 | struct stat sb; |
a167ba50 | 889 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a | 890 | int reopened = 0; |
83f64091 | 891 | #endif |
19cb3738 FB |
892 | int ret; |
893 | ||
894 | ret = fd_open(bs); | |
895 | if (ret < 0) | |
896 | return ret; | |
83f64091 | 897 | |
a167ba50 | 898 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
899 | again: |
900 | #endif | |
83f64091 FB |
901 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
902 | #ifdef DIOCGMEDIASIZE | |
903 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
c5e97233 BS |
904 | #elif defined(DIOCGPART) |
905 | { | |
906 | struct partinfo pi; | |
907 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
908 | size = pi.media_size; | |
909 | else | |
910 | size = 0; | |
911 | } | |
912 | if (size == 0) | |
83f64091 | 913 | #endif |
83affaa6 | 914 | #if defined(__APPLE__) && defined(__MACH__) |
83f64091 FB |
915 | size = LONG_LONG_MAX; |
916 | #else | |
917 | size = lseek(fd, 0LL, SEEK_END); | |
9f23011a | 918 | #endif |
a167ba50 | 919 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
920 | switch(s->type) { |
921 | case FTYPE_CD: | |
922 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
923 | if (size == 2048LL * (unsigned)-1) | |
924 | size = 0; | |
925 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 926 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
927 | reopened = 1; |
928 | goto again; | |
929 | } | |
930 | } | |
83f64091 | 931 | #endif |
50779cc2 | 932 | } else { |
83f64091 FB |
933 | size = lseek(fd, 0, SEEK_END); |
934 | } | |
83f64091 FB |
935 | return size; |
936 | } | |
50779cc2 CH |
937 | #else |
938 | static int64_t raw_getlength(BlockDriverState *bs) | |
939 | { | |
940 | BDRVRawState *s = bs->opaque; | |
941 | int ret; | |
942 | ||
943 | ret = fd_open(bs); | |
944 | if (ret < 0) { | |
945 | return ret; | |
946 | } | |
947 | ||
948 | return lseek(s->fd, 0, SEEK_END); | |
949 | } | |
128ab2ff | 950 | #endif |
83f64091 | 951 | |
4a1d5e1f FZ |
952 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
953 | { | |
954 | struct stat st; | |
955 | BDRVRawState *s = bs->opaque; | |
956 | ||
957 | if (fstat(s->fd, &st) < 0) { | |
958 | return -errno; | |
959 | } | |
960 | return (int64_t)st.st_blocks * 512; | |
961 | } | |
962 | ||
0e7e1989 | 963 | static int raw_create(const char *filename, QEMUOptionParameter *options) |
83f64091 FB |
964 | { |
965 | int fd; | |
1e37d059 | 966 | int result = 0; |
0e7e1989 | 967 | int64_t total_size = 0; |
83f64091 | 968 | |
0e7e1989 KW |
969 | /* Read out options */ |
970 | while (options && options->name) { | |
971 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
9040385d | 972 | total_size = options->value.n / BDRV_SECTOR_SIZE; |
0e7e1989 KW |
973 | } |
974 | options++; | |
975 | } | |
83f64091 | 976 | |
6165f4d8 CB |
977 | fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
978 | 0644); | |
1e37d059 SW |
979 | if (fd < 0) { |
980 | result = -errno; | |
981 | } else { | |
9040385d | 982 | if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
1e37d059 SW |
983 | result = -errno; |
984 | } | |
2e1e79da | 985 | if (qemu_close(fd) != 0) { |
1e37d059 SW |
986 | result = -errno; |
987 | } | |
988 | } | |
989 | return result; | |
83f64091 FB |
990 | } |
991 | ||
5500316d PB |
992 | /* |
993 | * Returns true iff the specified sector is present in the disk image. Drivers | |
994 | * not implementing the functionality are assumed to not support backing files, | |
995 | * hence all their sectors are reported as allocated. | |
996 | * | |
997 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
998 | * and 'pnum' is set to 0. | |
999 | * | |
1000 | * 'pnum' is set to the number of sectors (including and immediately following | |
1001 | * the specified sector) that are known to be in the same | |
1002 | * allocated/unallocated state. | |
1003 | * | |
1004 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
1005 | * beyond the end of the disk image it will be clamped. | |
1006 | */ | |
1007 | static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs, | |
1008 | int64_t sector_num, | |
1009 | int nb_sectors, int *pnum) | |
1010 | { | |
5500316d PB |
1011 | off_t start, data, hole; |
1012 | int ret; | |
1013 | ||
1014 | ret = fd_open(bs); | |
1015 | if (ret < 0) { | |
1016 | return ret; | |
1017 | } | |
1018 | ||
1019 | start = sector_num * BDRV_SECTOR_SIZE; | |
94282e71 | 1020 | |
5500316d | 1021 | #ifdef CONFIG_FIEMAP |
94282e71 KW |
1022 | |
1023 | BDRVRawState *s = bs->opaque; | |
5500316d PB |
1024 | struct { |
1025 | struct fiemap fm; | |
1026 | struct fiemap_extent fe; | |
1027 | } f; | |
94282e71 | 1028 | |
5500316d PB |
1029 | f.fm.fm_start = start; |
1030 | f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE; | |
1031 | f.fm.fm_flags = 0; | |
1032 | f.fm.fm_extent_count = 1; | |
1033 | f.fm.fm_reserved = 0; | |
1034 | if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) { | |
1035 | /* Assume everything is allocated. */ | |
1036 | *pnum = nb_sectors; | |
1037 | return 1; | |
1038 | } | |
1039 | ||
1040 | if (f.fm.fm_mapped_extents == 0) { | |
1041 | /* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length. | |
1042 | * f.fm.fm_start + f.fm.fm_length must be clamped to the file size! | |
1043 | */ | |
1044 | off_t length = lseek(s->fd, 0, SEEK_END); | |
1045 | hole = f.fm.fm_start; | |
1046 | data = MIN(f.fm.fm_start + f.fm.fm_length, length); | |
1047 | } else { | |
1048 | data = f.fe.fe_logical; | |
1049 | hole = f.fe.fe_logical + f.fe.fe_length; | |
1050 | } | |
94282e71 | 1051 | |
5500316d | 1052 | #elif defined SEEK_HOLE && defined SEEK_DATA |
94282e71 KW |
1053 | |
1054 | BDRVRawState *s = bs->opaque; | |
1055 | ||
5500316d PB |
1056 | hole = lseek(s->fd, start, SEEK_HOLE); |
1057 | if (hole == -1) { | |
1058 | /* -ENXIO indicates that sector_num was past the end of the file. | |
1059 | * There is a virtual hole there. */ | |
1060 | assert(errno != -ENXIO); | |
1061 | ||
1062 | /* Most likely EINVAL. Assume everything is allocated. */ | |
1063 | *pnum = nb_sectors; | |
1064 | return 1; | |
1065 | } | |
1066 | ||
1067 | if (hole > start) { | |
1068 | data = start; | |
1069 | } else { | |
1070 | /* On a hole. We need another syscall to find its end. */ | |
1071 | data = lseek(s->fd, start, SEEK_DATA); | |
1072 | if (data == -1) { | |
1073 | data = lseek(s->fd, 0, SEEK_END); | |
1074 | } | |
1075 | } | |
1076 | #else | |
1077 | *pnum = nb_sectors; | |
1078 | return 1; | |
1079 | #endif | |
1080 | ||
1081 | if (data <= start) { | |
1082 | /* On a data extent, compute sectors to the end of the extent. */ | |
1083 | *pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); | |
1084 | return 1; | |
1085 | } else { | |
1086 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
1087 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); | |
1088 | return 0; | |
1089 | } | |
1090 | } | |
1091 | ||
dce512de CH |
1092 | #ifdef CONFIG_XFS |
1093 | static int xfs_discard(BDRVRawState *s, int64_t sector_num, int nb_sectors) | |
1094 | { | |
1095 | struct xfs_flock64 fl; | |
1096 | ||
1097 | memset(&fl, 0, sizeof(fl)); | |
1098 | fl.l_whence = SEEK_SET; | |
1099 | fl.l_start = sector_num << 9; | |
1100 | fl.l_len = (int64_t)nb_sectors << 9; | |
1101 | ||
1102 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
1103 | DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno)); | |
1104 | return -errno; | |
1105 | } | |
1106 | ||
1107 | return 0; | |
1108 | } | |
1109 | #endif | |
1110 | ||
6db39ae2 PB |
1111 | static coroutine_fn int raw_co_discard(BlockDriverState *bs, |
1112 | int64_t sector_num, int nb_sectors) | |
dce512de CH |
1113 | { |
1114 | #ifdef CONFIG_XFS | |
1115 | BDRVRawState *s = bs->opaque; | |
1116 | ||
1117 | if (s->is_xfs) { | |
1118 | return xfs_discard(s, sector_num, nb_sectors); | |
1119 | } | |
1120 | #endif | |
1121 | ||
1122 | return 0; | |
1123 | } | |
0e7e1989 KW |
1124 | |
1125 | static QEMUOptionParameter raw_create_options[] = { | |
db08adf5 KW |
1126 | { |
1127 | .name = BLOCK_OPT_SIZE, | |
1128 | .type = OPT_SIZE, | |
1129 | .help = "Virtual disk size" | |
1130 | }, | |
0e7e1989 KW |
1131 | { NULL } |
1132 | }; | |
1133 | ||
84a12e66 CH |
1134 | static BlockDriver bdrv_file = { |
1135 | .format_name = "file", | |
1136 | .protocol_name = "file", | |
856ae5c3 BS |
1137 | .instance_size = sizeof(BDRVRawState), |
1138 | .bdrv_probe = NULL, /* no probe for protocols */ | |
66f82cee | 1139 | .bdrv_file_open = raw_open, |
eeb6b45d JC |
1140 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1141 | .bdrv_reopen_commit = raw_reopen_commit, | |
1142 | .bdrv_reopen_abort = raw_reopen_abort, | |
856ae5c3 BS |
1143 | .bdrv_close = raw_close, |
1144 | .bdrv_create = raw_create, | |
6db39ae2 | 1145 | .bdrv_co_discard = raw_co_discard, |
5500316d | 1146 | .bdrv_co_is_allocated = raw_co_is_allocated, |
3b46e624 | 1147 | |
f141eafe AL |
1148 | .bdrv_aio_readv = raw_aio_readv, |
1149 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1150 | .bdrv_aio_flush = raw_aio_flush, |
3c529d93 | 1151 | |
83f64091 FB |
1152 | .bdrv_truncate = raw_truncate, |
1153 | .bdrv_getlength = raw_getlength, | |
4a1d5e1f FZ |
1154 | .bdrv_get_allocated_file_size |
1155 | = raw_get_allocated_file_size, | |
0e7e1989 KW |
1156 | |
1157 | .create_options = raw_create_options, | |
83f64091 FB |
1158 | }; |
1159 | ||
19cb3738 FB |
1160 | /***********************************************/ |
1161 | /* host device */ | |
1162 | ||
83affaa6 | 1163 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1164 | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); |
1165 | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); | |
1166 | ||
1167 | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) | |
1168 | { | |
5fafdf24 | 1169 | kern_return_t kernResult; |
19cb3738 FB |
1170 | mach_port_t masterPort; |
1171 | CFMutableDictionaryRef classesToMatch; | |
1172 | ||
1173 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
1174 | if ( KERN_SUCCESS != kernResult ) { | |
1175 | printf( "IOMasterPort returned %d\n", kernResult ); | |
1176 | } | |
3b46e624 | 1177 | |
5fafdf24 | 1178 | classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
19cb3738 FB |
1179 | if ( classesToMatch == NULL ) { |
1180 | printf( "IOServiceMatching returned a NULL dictionary.\n" ); | |
1181 | } else { | |
1182 | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); | |
1183 | } | |
1184 | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); | |
1185 | if ( KERN_SUCCESS != kernResult ) | |
1186 | { | |
1187 | printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); | |
1188 | } | |
3b46e624 | 1189 | |
19cb3738 FB |
1190 | return kernResult; |
1191 | } | |
1192 | ||
1193 | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) | |
1194 | { | |
1195 | io_object_t nextMedia; | |
1196 | kern_return_t kernResult = KERN_FAILURE; | |
1197 | *bsdPath = '\0'; | |
1198 | nextMedia = IOIteratorNext( mediaIterator ); | |
1199 | if ( nextMedia ) | |
1200 | { | |
1201 | CFTypeRef bsdPathAsCFString; | |
1202 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
1203 | if ( bsdPathAsCFString ) { | |
1204 | size_t devPathLength; | |
1205 | strcpy( bsdPath, _PATH_DEV ); | |
1206 | strcat( bsdPath, "r" ); | |
1207 | devPathLength = strlen( bsdPath ); | |
1208 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
1209 | kernResult = KERN_SUCCESS; | |
1210 | } | |
1211 | CFRelease( bsdPathAsCFString ); | |
1212 | } | |
1213 | IOObjectRelease( nextMedia ); | |
1214 | } | |
3b46e624 | 1215 | |
19cb3738 FB |
1216 | return kernResult; |
1217 | } | |
1218 | ||
1219 | #endif | |
1220 | ||
508c7cb3 CH |
1221 | static int hdev_probe_device(const char *filename) |
1222 | { | |
1223 | struct stat st; | |
1224 | ||
1225 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
1226 | if (strstart(filename, "/dev/cdrom", NULL)) | |
1227 | return 50; | |
1228 | ||
1229 | if (stat(filename, &st) >= 0 && | |
1230 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
1231 | return 100; | |
1232 | } | |
1233 | ||
1234 | return 0; | |
1235 | } | |
1236 | ||
19cb3738 FB |
1237 | static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
1238 | { | |
1239 | BDRVRawState *s = bs->opaque; | |
a76bab49 | 1240 | |
83affaa6 | 1241 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1242 | if (strstart(filename, "/dev/cdrom", NULL)) { |
1243 | kern_return_t kernResult; | |
1244 | io_iterator_t mediaIterator; | |
1245 | char bsdPath[ MAXPATHLEN ]; | |
1246 | int fd; | |
5fafdf24 | 1247 | |
19cb3738 FB |
1248 | kernResult = FindEjectableCDMedia( &mediaIterator ); |
1249 | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); | |
3b46e624 | 1250 | |
19cb3738 FB |
1251 | if ( bsdPath[ 0 ] != '\0' ) { |
1252 | strcat(bsdPath,"s0"); | |
1253 | /* some CDs don't have a partition 0 */ | |
6165f4d8 | 1254 | fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
19cb3738 FB |
1255 | if (fd < 0) { |
1256 | bsdPath[strlen(bsdPath)-1] = '1'; | |
1257 | } else { | |
2e1e79da | 1258 | qemu_close(fd); |
19cb3738 FB |
1259 | } |
1260 | filename = bsdPath; | |
1261 | } | |
3b46e624 | 1262 | |
19cb3738 FB |
1263 | if ( mediaIterator ) |
1264 | IOObjectRelease( mediaIterator ); | |
1265 | } | |
1266 | #endif | |
19cb3738 FB |
1267 | |
1268 | s->type = FTYPE_FILE; | |
4dd75c70 | 1269 | #if defined(__linux__) |
05acda4d BK |
1270 | { |
1271 | char resolved_path[ MAXPATHLEN ], *temp; | |
1272 | ||
1273 | temp = realpath(filename, resolved_path); | |
1274 | if (temp && strstart(temp, "/dev/sg", NULL)) { | |
1275 | bs->sg = 1; | |
1276 | } | |
19cb3738 FB |
1277 | } |
1278 | #endif | |
90babde0 | 1279 | |
19a3da7f | 1280 | return raw_open_common(bs, filename, flags, 0); |
19cb3738 FB |
1281 | } |
1282 | ||
03ff3ca3 | 1283 | #if defined(__linux__) |
19cb3738 FB |
1284 | /* Note: we do not have a reliable method to detect if the floppy is |
1285 | present. The current method is to try to open the floppy at every | |
1286 | I/O and to keep it opened during a few hundreds of ms. */ | |
1287 | static int fd_open(BlockDriverState *bs) | |
1288 | { | |
1289 | BDRVRawState *s = bs->opaque; | |
1290 | int last_media_present; | |
1291 | ||
1292 | if (s->type != FTYPE_FD) | |
1293 | return 0; | |
1294 | last_media_present = (s->fd >= 0); | |
5fafdf24 | 1295 | if (s->fd >= 0 && |
c57c846a | 1296 | (get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
2e1e79da | 1297 | qemu_close(s->fd); |
19cb3738 FB |
1298 | s->fd = -1; |
1299 | #ifdef DEBUG_FLOPPY | |
1300 | printf("Floppy closed\n"); | |
1301 | #endif | |
1302 | } | |
1303 | if (s->fd < 0) { | |
5fafdf24 | 1304 | if (s->fd_got_error && |
c57c846a | 1305 | (get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
19cb3738 FB |
1306 | #ifdef DEBUG_FLOPPY |
1307 | printf("No floppy (open delayed)\n"); | |
1308 | #endif | |
1309 | return -EIO; | |
1310 | } | |
6165f4d8 | 1311 | s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK); |
19cb3738 | 1312 | if (s->fd < 0) { |
c57c846a | 1313 | s->fd_error_time = get_clock(); |
19cb3738 FB |
1314 | s->fd_got_error = 1; |
1315 | if (last_media_present) | |
1316 | s->fd_media_changed = 1; | |
1317 | #ifdef DEBUG_FLOPPY | |
1318 | printf("No floppy\n"); | |
1319 | #endif | |
1320 | return -EIO; | |
1321 | } | |
1322 | #ifdef DEBUG_FLOPPY | |
1323 | printf("Floppy opened\n"); | |
1324 | #endif | |
1325 | } | |
1326 | if (!last_media_present) | |
1327 | s->fd_media_changed = 1; | |
c57c846a | 1328 | s->fd_open_time = get_clock(); |
19cb3738 FB |
1329 | s->fd_got_error = 0; |
1330 | return 0; | |
1331 | } | |
19cb3738 | 1332 | |
63ec93db | 1333 | static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
985a03b0 TS |
1334 | { |
1335 | BDRVRawState *s = bs->opaque; | |
1336 | ||
1337 | return ioctl(s->fd, req, buf); | |
1338 | } | |
221f715d | 1339 | |
63ec93db | 1340 | static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
221f715d AL |
1341 | unsigned long int req, void *buf, |
1342 | BlockDriverCompletionFunc *cb, void *opaque) | |
1343 | { | |
f141eafe | 1344 | BDRVRawState *s = bs->opaque; |
221f715d | 1345 | |
f141eafe AL |
1346 | if (fd_open(bs) < 0) |
1347 | return NULL; | |
9ef91a67 | 1348 | return paio_ioctl(bs, s->fd, req, buf, cb, opaque); |
221f715d AL |
1349 | } |
1350 | ||
a167ba50 | 1351 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1352 | static int fd_open(BlockDriverState *bs) |
1353 | { | |
1354 | BDRVRawState *s = bs->opaque; | |
1355 | ||
1356 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
1357 | if (s->fd >= 0) | |
1358 | return 0; | |
1359 | return -EIO; | |
1360 | } | |
9f23011a | 1361 | #else /* !linux && !FreeBSD */ |
19cb3738 | 1362 | |
08af02e2 AL |
1363 | static int fd_open(BlockDriverState *bs) |
1364 | { | |
1365 | return 0; | |
1366 | } | |
1367 | ||
221f715d | 1368 | #endif /* !linux && !FreeBSD */ |
04eeb8b6 | 1369 | |
0e7e1989 | 1370 | static int hdev_create(const char *filename, QEMUOptionParameter *options) |
93c65b47 AL |
1371 | { |
1372 | int fd; | |
1373 | int ret = 0; | |
1374 | struct stat stat_buf; | |
0e7e1989 | 1375 | int64_t total_size = 0; |
93c65b47 | 1376 | |
0e7e1989 KW |
1377 | /* Read out options */ |
1378 | while (options && options->name) { | |
1379 | if (!strcmp(options->name, "size")) { | |
9040385d | 1380 | total_size = options->value.n / BDRV_SECTOR_SIZE; |
0e7e1989 KW |
1381 | } |
1382 | options++; | |
1383 | } | |
93c65b47 | 1384 | |
6165f4d8 | 1385 | fd = qemu_open(filename, O_WRONLY | O_BINARY); |
93c65b47 | 1386 | if (fd < 0) |
57e69b7d | 1387 | return -errno; |
93c65b47 AL |
1388 | |
1389 | if (fstat(fd, &stat_buf) < 0) | |
57e69b7d | 1390 | ret = -errno; |
4099df58 | 1391 | else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
57e69b7d | 1392 | ret = -ENODEV; |
9040385d | 1393 | else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) |
93c65b47 AL |
1394 | ret = -ENOSPC; |
1395 | ||
2e1e79da | 1396 | qemu_close(fd); |
93c65b47 AL |
1397 | return ret; |
1398 | } | |
1399 | ||
336c1c12 KW |
1400 | static int hdev_has_zero_init(BlockDriverState *bs) |
1401 | { | |
1402 | return 0; | |
1403 | } | |
1404 | ||
5efa9d5a | 1405 | static BlockDriver bdrv_host_device = { |
0b4ce02e | 1406 | .format_name = "host_device", |
84a12e66 | 1407 | .protocol_name = "host_device", |
0b4ce02e KW |
1408 | .instance_size = sizeof(BDRVRawState), |
1409 | .bdrv_probe_device = hdev_probe_device, | |
66f82cee | 1410 | .bdrv_file_open = hdev_open, |
0b4ce02e | 1411 | .bdrv_close = raw_close, |
93c65b47 | 1412 | .bdrv_create = hdev_create, |
0b4ce02e | 1413 | .create_options = raw_create_options, |
336c1c12 | 1414 | .bdrv_has_zero_init = hdev_has_zero_init, |
3b46e624 | 1415 | |
f141eafe AL |
1416 | .bdrv_aio_readv = raw_aio_readv, |
1417 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1418 | .bdrv_aio_flush = raw_aio_flush, |
3c529d93 | 1419 | |
55b949c8 | 1420 | .bdrv_truncate = raw_truncate, |
e60f469c | 1421 | .bdrv_getlength = raw_getlength, |
4a1d5e1f FZ |
1422 | .bdrv_get_allocated_file_size |
1423 | = raw_get_allocated_file_size, | |
19cb3738 | 1424 | |
f3a5d3f8 | 1425 | /* generic scsi device */ |
63ec93db CH |
1426 | #ifdef __linux__ |
1427 | .bdrv_ioctl = hdev_ioctl, | |
63ec93db CH |
1428 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
1429 | #endif | |
f3a5d3f8 CH |
1430 | }; |
1431 | ||
1432 | #ifdef __linux__ | |
1433 | static int floppy_open(BlockDriverState *bs, const char *filename, int flags) | |
1434 | { | |
1435 | BDRVRawState *s = bs->opaque; | |
1436 | int ret; | |
1437 | ||
f3a5d3f8 | 1438 | s->type = FTYPE_FD; |
f3a5d3f8 | 1439 | |
19a3da7f BS |
1440 | /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ |
1441 | ret = raw_open_common(bs, filename, flags, O_NONBLOCK); | |
f3a5d3f8 CH |
1442 | if (ret) |
1443 | return ret; | |
1444 | ||
1445 | /* close fd so that we can reopen it as needed */ | |
2e1e79da | 1446 | qemu_close(s->fd); |
f3a5d3f8 CH |
1447 | s->fd = -1; |
1448 | s->fd_media_changed = 1; | |
1449 | ||
1450 | return 0; | |
1451 | } | |
1452 | ||
508c7cb3 CH |
1453 | static int floppy_probe_device(const char *filename) |
1454 | { | |
2ebf7c4b CR |
1455 | int fd, ret; |
1456 | int prio = 0; | |
1457 | struct floppy_struct fdparam; | |
343f8568 | 1458 | struct stat st; |
2ebf7c4b | 1459 | |
e1740828 CB |
1460 | if (strstart(filename, "/dev/fd", NULL) && |
1461 | !strstart(filename, "/dev/fdset/", NULL)) { | |
2ebf7c4b | 1462 | prio = 50; |
e1740828 | 1463 | } |
2ebf7c4b | 1464 | |
6165f4d8 | 1465 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
2ebf7c4b CR |
1466 | if (fd < 0) { |
1467 | goto out; | |
1468 | } | |
343f8568 JS |
1469 | ret = fstat(fd, &st); |
1470 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
1471 | goto outc; | |
1472 | } | |
2ebf7c4b CR |
1473 | |
1474 | /* Attempt to detect via a floppy specific ioctl */ | |
1475 | ret = ioctl(fd, FDGETPRM, &fdparam); | |
1476 | if (ret >= 0) | |
1477 | prio = 100; | |
1478 | ||
343f8568 | 1479 | outc: |
2e1e79da | 1480 | qemu_close(fd); |
2ebf7c4b CR |
1481 | out: |
1482 | return prio; | |
508c7cb3 CH |
1483 | } |
1484 | ||
1485 | ||
f3a5d3f8 CH |
1486 | static int floppy_is_inserted(BlockDriverState *bs) |
1487 | { | |
1488 | return fd_open(bs) >= 0; | |
1489 | } | |
1490 | ||
1491 | static int floppy_media_changed(BlockDriverState *bs) | |
1492 | { | |
1493 | BDRVRawState *s = bs->opaque; | |
1494 | int ret; | |
1495 | ||
1496 | /* | |
1497 | * XXX: we do not have a true media changed indication. | |
1498 | * It does not work if the floppy is changed without trying to read it. | |
1499 | */ | |
1500 | fd_open(bs); | |
1501 | ret = s->fd_media_changed; | |
1502 | s->fd_media_changed = 0; | |
1503 | #ifdef DEBUG_FLOPPY | |
1504 | printf("Floppy changed=%d\n", ret); | |
1505 | #endif | |
1506 | return ret; | |
1507 | } | |
1508 | ||
f36f3949 | 1509 | static void floppy_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
1510 | { |
1511 | BDRVRawState *s = bs->opaque; | |
1512 | int fd; | |
1513 | ||
1514 | if (s->fd >= 0) { | |
2e1e79da | 1515 | qemu_close(s->fd); |
f3a5d3f8 CH |
1516 | s->fd = -1; |
1517 | } | |
6165f4d8 | 1518 | fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK); |
f3a5d3f8 CH |
1519 | if (fd >= 0) { |
1520 | if (ioctl(fd, FDEJECT, 0) < 0) | |
1521 | perror("FDEJECT"); | |
2e1e79da | 1522 | qemu_close(fd); |
f3a5d3f8 | 1523 | } |
f3a5d3f8 CH |
1524 | } |
1525 | ||
1526 | static BlockDriver bdrv_host_floppy = { | |
1527 | .format_name = "host_floppy", | |
84a12e66 | 1528 | .protocol_name = "host_floppy", |
f3a5d3f8 | 1529 | .instance_size = sizeof(BDRVRawState), |
508c7cb3 | 1530 | .bdrv_probe_device = floppy_probe_device, |
66f82cee | 1531 | .bdrv_file_open = floppy_open, |
f3a5d3f8 CH |
1532 | .bdrv_close = raw_close, |
1533 | .bdrv_create = hdev_create, | |
0b4ce02e | 1534 | .create_options = raw_create_options, |
336c1c12 | 1535 | .bdrv_has_zero_init = hdev_has_zero_init, |
f3a5d3f8 | 1536 | |
f3a5d3f8 CH |
1537 | .bdrv_aio_readv = raw_aio_readv, |
1538 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1539 | .bdrv_aio_flush = raw_aio_flush, |
f3a5d3f8 | 1540 | |
55b949c8 | 1541 | .bdrv_truncate = raw_truncate, |
f3a5d3f8 | 1542 | .bdrv_getlength = raw_getlength, |
4a1d5e1f FZ |
1543 | .bdrv_get_allocated_file_size |
1544 | = raw_get_allocated_file_size, | |
f3a5d3f8 CH |
1545 | |
1546 | /* removable device support */ | |
1547 | .bdrv_is_inserted = floppy_is_inserted, | |
1548 | .bdrv_media_changed = floppy_media_changed, | |
1549 | .bdrv_eject = floppy_eject, | |
f3a5d3f8 CH |
1550 | }; |
1551 | ||
1552 | static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) | |
1553 | { | |
1554 | BDRVRawState *s = bs->opaque; | |
1555 | ||
f3a5d3f8 CH |
1556 | s->type = FTYPE_CD; |
1557 | ||
19a3da7f BS |
1558 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
1559 | return raw_open_common(bs, filename, flags, O_NONBLOCK); | |
f3a5d3f8 CH |
1560 | } |
1561 | ||
508c7cb3 CH |
1562 | static int cdrom_probe_device(const char *filename) |
1563 | { | |
3baf720e CR |
1564 | int fd, ret; |
1565 | int prio = 0; | |
343f8568 | 1566 | struct stat st; |
3baf720e | 1567 | |
6165f4d8 | 1568 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
3baf720e CR |
1569 | if (fd < 0) { |
1570 | goto out; | |
1571 | } | |
343f8568 JS |
1572 | ret = fstat(fd, &st); |
1573 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
1574 | goto outc; | |
1575 | } | |
3baf720e CR |
1576 | |
1577 | /* Attempt to detect via a CDROM specific ioctl */ | |
1578 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
1579 | if (ret >= 0) | |
1580 | prio = 100; | |
1581 | ||
343f8568 | 1582 | outc: |
2e1e79da | 1583 | qemu_close(fd); |
3baf720e CR |
1584 | out: |
1585 | return prio; | |
508c7cb3 CH |
1586 | } |
1587 | ||
f3a5d3f8 CH |
1588 | static int cdrom_is_inserted(BlockDriverState *bs) |
1589 | { | |
1590 | BDRVRawState *s = bs->opaque; | |
1591 | int ret; | |
1592 | ||
1593 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
1594 | if (ret == CDS_DISC_OK) | |
1595 | return 1; | |
1596 | return 0; | |
1597 | } | |
1598 | ||
f36f3949 | 1599 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
1600 | { |
1601 | BDRVRawState *s = bs->opaque; | |
1602 | ||
1603 | if (eject_flag) { | |
1604 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
1605 | perror("CDROMEJECT"); | |
1606 | } else { | |
1607 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
1608 | perror("CDROMEJECT"); | |
1609 | } | |
f3a5d3f8 CH |
1610 | } |
1611 | ||
025e849a | 1612 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
1613 | { |
1614 | BDRVRawState *s = bs->opaque; | |
1615 | ||
1616 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
1617 | /* | |
1618 | * Note: an error can happen if the distribution automatically | |
1619 | * mounts the CD-ROM | |
1620 | */ | |
1621 | /* perror("CDROM_LOCKDOOR"); */ | |
1622 | } | |
f3a5d3f8 CH |
1623 | } |
1624 | ||
1625 | static BlockDriver bdrv_host_cdrom = { | |
1626 | .format_name = "host_cdrom", | |
84a12e66 | 1627 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 1628 | .instance_size = sizeof(BDRVRawState), |
508c7cb3 | 1629 | .bdrv_probe_device = cdrom_probe_device, |
66f82cee | 1630 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 CH |
1631 | .bdrv_close = raw_close, |
1632 | .bdrv_create = hdev_create, | |
0b4ce02e | 1633 | .create_options = raw_create_options, |
336c1c12 | 1634 | .bdrv_has_zero_init = hdev_has_zero_init, |
f3a5d3f8 | 1635 | |
f3a5d3f8 CH |
1636 | .bdrv_aio_readv = raw_aio_readv, |
1637 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1638 | .bdrv_aio_flush = raw_aio_flush, |
f3a5d3f8 | 1639 | |
55b949c8 | 1640 | .bdrv_truncate = raw_truncate, |
f3a5d3f8 | 1641 | .bdrv_getlength = raw_getlength, |
4a1d5e1f FZ |
1642 | .bdrv_get_allocated_file_size |
1643 | = raw_get_allocated_file_size, | |
f3a5d3f8 CH |
1644 | |
1645 | /* removable device support */ | |
1646 | .bdrv_is_inserted = cdrom_is_inserted, | |
1647 | .bdrv_eject = cdrom_eject, | |
025e849a | 1648 | .bdrv_lock_medium = cdrom_lock_medium, |
f3a5d3f8 CH |
1649 | |
1650 | /* generic scsi device */ | |
63ec93db | 1651 | .bdrv_ioctl = hdev_ioctl, |
63ec93db | 1652 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
f3a5d3f8 CH |
1653 | }; |
1654 | #endif /* __linux__ */ | |
1655 | ||
a167ba50 | 1656 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
1657 | static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1658 | { | |
1659 | BDRVRawState *s = bs->opaque; | |
1660 | int ret; | |
1661 | ||
1662 | s->type = FTYPE_CD; | |
1663 | ||
19a3da7f | 1664 | ret = raw_open_common(bs, filename, flags, 0); |
f3a5d3f8 CH |
1665 | if (ret) |
1666 | return ret; | |
1667 | ||
9b2260cb | 1668 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
1669 | ioctl(s->fd, CDIOCALLOW); |
1670 | return 0; | |
1671 | } | |
1672 | ||
508c7cb3 CH |
1673 | static int cdrom_probe_device(const char *filename) |
1674 | { | |
1675 | if (strstart(filename, "/dev/cd", NULL) || | |
1676 | strstart(filename, "/dev/acd", NULL)) | |
1677 | return 100; | |
1678 | return 0; | |
1679 | } | |
1680 | ||
f3a5d3f8 CH |
1681 | static int cdrom_reopen(BlockDriverState *bs) |
1682 | { | |
1683 | BDRVRawState *s = bs->opaque; | |
1684 | int fd; | |
1685 | ||
1686 | /* | |
1687 | * Force reread of possibly changed/newly loaded disc, | |
1688 | * FreeBSD seems to not notice sometimes... | |
1689 | */ | |
1690 | if (s->fd >= 0) | |
2e1e79da | 1691 | qemu_close(s->fd); |
6165f4d8 | 1692 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
f3a5d3f8 CH |
1693 | if (fd < 0) { |
1694 | s->fd = -1; | |
1695 | return -EIO; | |
1696 | } | |
1697 | s->fd = fd; | |
1698 | ||
9b2260cb | 1699 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
1700 | ioctl(s->fd, CDIOCALLOW); |
1701 | return 0; | |
1702 | } | |
1703 | ||
1704 | static int cdrom_is_inserted(BlockDriverState *bs) | |
1705 | { | |
1706 | return raw_getlength(bs) > 0; | |
1707 | } | |
1708 | ||
f36f3949 | 1709 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
1710 | { |
1711 | BDRVRawState *s = bs->opaque; | |
1712 | ||
1713 | if (s->fd < 0) | |
822e1cd1 | 1714 | return; |
f3a5d3f8 CH |
1715 | |
1716 | (void) ioctl(s->fd, CDIOCALLOW); | |
1717 | ||
1718 | if (eject_flag) { | |
1719 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
1720 | perror("CDIOCEJECT"); | |
1721 | } else { | |
1722 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
1723 | perror("CDIOCCLOSE"); | |
1724 | } | |
1725 | ||
822e1cd1 | 1726 | cdrom_reopen(bs); |
f3a5d3f8 CH |
1727 | } |
1728 | ||
025e849a | 1729 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
1730 | { |
1731 | BDRVRawState *s = bs->opaque; | |
1732 | ||
1733 | if (s->fd < 0) | |
7bf37fed | 1734 | return; |
f3a5d3f8 CH |
1735 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
1736 | /* | |
1737 | * Note: an error can happen if the distribution automatically | |
1738 | * mounts the CD-ROM | |
1739 | */ | |
1740 | /* perror("CDROM_LOCKDOOR"); */ | |
1741 | } | |
f3a5d3f8 CH |
1742 | } |
1743 | ||
1744 | static BlockDriver bdrv_host_cdrom = { | |
1745 | .format_name = "host_cdrom", | |
84a12e66 | 1746 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 1747 | .instance_size = sizeof(BDRVRawState), |
508c7cb3 | 1748 | .bdrv_probe_device = cdrom_probe_device, |
66f82cee | 1749 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 CH |
1750 | .bdrv_close = raw_close, |
1751 | .bdrv_create = hdev_create, | |
0b4ce02e | 1752 | .create_options = raw_create_options, |
336c1c12 | 1753 | .bdrv_has_zero_init = hdev_has_zero_init, |
f3a5d3f8 | 1754 | |
f3a5d3f8 CH |
1755 | .bdrv_aio_readv = raw_aio_readv, |
1756 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1757 | .bdrv_aio_flush = raw_aio_flush, |
f3a5d3f8 | 1758 | |
55b949c8 | 1759 | .bdrv_truncate = raw_truncate, |
f3a5d3f8 | 1760 | .bdrv_getlength = raw_getlength, |
4a1d5e1f FZ |
1761 | .bdrv_get_allocated_file_size |
1762 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 1763 | |
19cb3738 | 1764 | /* removable device support */ |
f3a5d3f8 CH |
1765 | .bdrv_is_inserted = cdrom_is_inserted, |
1766 | .bdrv_eject = cdrom_eject, | |
025e849a | 1767 | .bdrv_lock_medium = cdrom_lock_medium, |
19cb3738 | 1768 | }; |
f3a5d3f8 | 1769 | #endif /* __FreeBSD__ */ |
5efa9d5a | 1770 | |
84a12e66 | 1771 | static void bdrv_file_init(void) |
5efa9d5a | 1772 | { |
508c7cb3 CH |
1773 | /* |
1774 | * Register all the drivers. Note that order is important, the driver | |
1775 | * registered last will get probed first. | |
1776 | */ | |
84a12e66 | 1777 | bdrv_register(&bdrv_file); |
5efa9d5a | 1778 | bdrv_register(&bdrv_host_device); |
f3a5d3f8 CH |
1779 | #ifdef __linux__ |
1780 | bdrv_register(&bdrv_host_floppy); | |
1781 | bdrv_register(&bdrv_host_cdrom); | |
1782 | #endif | |
a167ba50 | 1783 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
1784 | bdrv_register(&bdrv_host_cdrom); |
1785 | #endif | |
5efa9d5a AL |
1786 | } |
1787 | ||
84a12e66 | 1788 | block_init(bdrv_file_init); |