]>
Commit | Line | Data |
---|---|---|
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" |
1de7afc9 PB |
25 | #include "qemu/timer.h" |
26 | #include "qemu/log.h" | |
737e150e | 27 | #include "block/block_int.h" |
1de7afc9 | 28 | #include "qemu/module.h" |
de81a169 | 29 | #include "trace.h" |
737e150e | 30 | #include "block/thread-pool.h" |
1de7afc9 | 31 | #include "qemu/iov.h" |
9f8540ec | 32 | #include "raw-aio.h" |
83f64091 | 33 | |
83affaa6 | 34 | #if defined(__APPLE__) && (__MACH__) |
83f64091 FB |
35 | #include <paths.h> |
36 | #include <sys/param.h> | |
37 | #include <IOKit/IOKitLib.h> | |
38 | #include <IOKit/IOBSD.h> | |
39 | #include <IOKit/storage/IOMediaBSDClient.h> | |
40 | #include <IOKit/storage/IOMedia.h> | |
41 | #include <IOKit/storage/IOCDMedia.h> | |
42 | //#include <IOKit/storage/IOCDTypes.h> | |
43 | #include <CoreFoundation/CoreFoundation.h> | |
44 | #endif | |
45 | ||
46 | #ifdef __sun__ | |
2e9671da | 47 | #define _POSIX_PTHREAD_SEMANTICS 1 |
83f64091 FB |
48 | #include <sys/dkio.h> |
49 | #endif | |
19cb3738 | 50 | #ifdef __linux__ |
343f8568 JS |
51 | #include <sys/types.h> |
52 | #include <sys/stat.h> | |
19cb3738 | 53 | #include <sys/ioctl.h> |
05acda4d | 54 | #include <sys/param.h> |
19cb3738 FB |
55 | #include <linux/cdrom.h> |
56 | #include <linux/fd.h> | |
5500316d PB |
57 | #include <linux/fs.h> |
58 | #endif | |
59 | #ifdef CONFIG_FIEMAP | |
60 | #include <linux/fiemap.h> | |
19cb3738 | 61 | #endif |
3d4fa43e KK |
62 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
63 | #include <linux/falloc.h> | |
64 | #endif | |
a167ba50 | 65 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
1cb6c3fd | 66 | #include <sys/disk.h> |
9f23011a | 67 | #include <sys/cdio.h> |
1cb6c3fd | 68 | #endif |
83f64091 | 69 | |
128ab2ff BS |
70 | #ifdef __OpenBSD__ |
71 | #include <sys/ioctl.h> | |
72 | #include <sys/disklabel.h> | |
73 | #include <sys/dkio.h> | |
74 | #endif | |
75 | ||
d1f6fd8d CE |
76 | #ifdef __NetBSD__ |
77 | #include <sys/ioctl.h> | |
78 | #include <sys/disklabel.h> | |
79 | #include <sys/dkio.h> | |
80 | #include <sys/disk.h> | |
81 | #endif | |
82 | ||
c5e97233 BS |
83 | #ifdef __DragonFly__ |
84 | #include <sys/ioctl.h> | |
85 | #include <sys/diskslice.h> | |
86 | #endif | |
87 | ||
dce512de CH |
88 | #ifdef CONFIG_XFS |
89 | #include <xfs/xfs.h> | |
90 | #endif | |
91 | ||
19cb3738 | 92 | //#define DEBUG_FLOPPY |
83f64091 | 93 | |
faf07963 | 94 | //#define DEBUG_BLOCK |
03ff3ca3 | 95 | #if defined(DEBUG_BLOCK) |
001faf32 BS |
96 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ |
97 | { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) | |
8c05dbf9 | 98 | #else |
001faf32 | 99 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) |
8c05dbf9 TS |
100 | #endif |
101 | ||
f6465578 AL |
102 | /* OS X does not have O_DSYNC */ |
103 | #ifndef O_DSYNC | |
1c27a8b3 | 104 | #ifdef O_SYNC |
7ab064d2 | 105 | #define O_DSYNC O_SYNC |
1c27a8b3 JA |
106 | #elif defined(O_FSYNC) |
107 | #define O_DSYNC O_FSYNC | |
108 | #endif | |
f6465578 AL |
109 | #endif |
110 | ||
9f7965c7 AL |
111 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
112 | #ifndef O_DIRECT | |
113 | #define O_DIRECT O_DSYNC | |
114 | #endif | |
115 | ||
19cb3738 FB |
116 | #define FTYPE_FILE 0 |
117 | #define FTYPE_CD 1 | |
118 | #define FTYPE_FD 2 | |
83f64091 | 119 | |
c57c846a | 120 | /* if the FD is not accessed during that time (in ns), we try to |
19cb3738 | 121 | reopen it to see if the disk has been changed */ |
c57c846a | 122 | #define FD_OPEN_TIMEOUT (1000000000) |
83f64091 | 123 | |
581b9e29 CH |
124 | #define MAX_BLOCKSIZE 4096 |
125 | ||
19cb3738 FB |
126 | typedef struct BDRVRawState { |
127 | int fd; | |
128 | int type; | |
0e1d8f4c | 129 | int open_flags; |
19cb3738 FB |
130 | #if defined(__linux__) |
131 | /* linux floppy specific */ | |
19cb3738 FB |
132 | int64_t fd_open_time; |
133 | int64_t fd_error_time; | |
134 | int fd_got_error; | |
135 | int fd_media_changed; | |
83f64091 | 136 | #endif |
e44bd6fc | 137 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c | 138 | int use_aio; |
1e5b9d2f | 139 | void *aio_ctx; |
e44bd6fc | 140 | #endif |
dce512de | 141 | #ifdef CONFIG_XFS |
260a82e5 | 142 | bool is_xfs:1; |
dce512de | 143 | #endif |
260a82e5 | 144 | bool has_discard:1; |
97a2ae34 | 145 | bool has_write_zeroes:1; |
260a82e5 | 146 | bool discard_zeroes:1; |
19cb3738 FB |
147 | } BDRVRawState; |
148 | ||
eeb6b45d JC |
149 | typedef struct BDRVRawReopenState { |
150 | int fd; | |
151 | int open_flags; | |
152 | #ifdef CONFIG_LINUX_AIO | |
153 | int use_aio; | |
154 | #endif | |
155 | } BDRVRawReopenState; | |
156 | ||
19cb3738 | 157 | static int fd_open(BlockDriverState *bs); |
22afa7b5 | 158 | static int64_t raw_getlength(BlockDriverState *bs); |
83f64091 | 159 | |
de81a169 PB |
160 | typedef struct RawPosixAIOData { |
161 | BlockDriverState *bs; | |
162 | int aio_fildes; | |
163 | union { | |
164 | struct iovec *aio_iov; | |
165 | void *aio_ioctl_buf; | |
166 | }; | |
167 | int aio_niov; | |
8238010b | 168 | uint64_t aio_nbytes; |
de81a169 PB |
169 | #define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */ |
170 | off_t aio_offset; | |
171 | int aio_type; | |
172 | } RawPosixAIOData; | |
173 | ||
a167ba50 | 174 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 | 175 | static int cdrom_reopen(BlockDriverState *bs); |
9f23011a BS |
176 | #endif |
177 | ||
1de1ae0a CE |
178 | #if defined(__NetBSD__) |
179 | static int raw_normalize_devicepath(const char **filename) | |
180 | { | |
181 | static char namebuf[PATH_MAX]; | |
182 | const char *dp, *fname; | |
183 | struct stat sb; | |
184 | ||
185 | fname = *filename; | |
186 | dp = strrchr(fname, '/'); | |
187 | if (lstat(fname, &sb) < 0) { | |
188 | fprintf(stderr, "%s: stat failed: %s\n", | |
189 | fname, strerror(errno)); | |
190 | return -errno; | |
191 | } | |
192 | ||
193 | if (!S_ISBLK(sb.st_mode)) { | |
194 | return 0; | |
195 | } | |
196 | ||
197 | if (dp == NULL) { | |
198 | snprintf(namebuf, PATH_MAX, "r%s", fname); | |
199 | } else { | |
200 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", | |
201 | (int)(dp - fname), fname, dp + 1); | |
202 | } | |
203 | fprintf(stderr, "%s is a block device", fname); | |
204 | *filename = namebuf; | |
205 | fprintf(stderr, ", using %s\n", *filename); | |
206 | ||
207 | return 0; | |
208 | } | |
209 | #else | |
210 | static int raw_normalize_devicepath(const char **filename) | |
211 | { | |
212 | return 0; | |
213 | } | |
214 | #endif | |
215 | ||
6a8dc042 JC |
216 | static void raw_parse_flags(int bdrv_flags, int *open_flags) |
217 | { | |
218 | assert(open_flags != NULL); | |
219 | ||
220 | *open_flags |= O_BINARY; | |
221 | *open_flags &= ~O_ACCMODE; | |
222 | if (bdrv_flags & BDRV_O_RDWR) { | |
223 | *open_flags |= O_RDWR; | |
224 | } else { | |
225 | *open_flags |= O_RDONLY; | |
226 | } | |
227 | ||
228 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
229 | * and O_DIRECT for no caching. */ | |
230 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
231 | *open_flags |= O_DIRECT; | |
232 | } | |
6a8dc042 JC |
233 | } |
234 | ||
fc32a72d JC |
235 | #ifdef CONFIG_LINUX_AIO |
236 | static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) | |
237 | { | |
238 | int ret = -1; | |
239 | assert(aio_ctx != NULL); | |
240 | assert(use_aio != NULL); | |
241 | /* | |
242 | * Currently Linux do AIO only for files opened with O_DIRECT | |
243 | * specified so check NOCACHE flag too | |
244 | */ | |
245 | if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) == | |
246 | (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { | |
247 | ||
248 | /* if non-NULL, laio_init() has already been run */ | |
249 | if (*aio_ctx == NULL) { | |
250 | *aio_ctx = laio_init(); | |
251 | if (!*aio_ctx) { | |
252 | goto error; | |
253 | } | |
254 | } | |
255 | *use_aio = 1; | |
256 | } else { | |
257 | *use_aio = 0; | |
258 | } | |
259 | ||
260 | ret = 0; | |
261 | ||
262 | error: | |
263 | return ret; | |
264 | } | |
265 | #endif | |
266 | ||
c66a6157 KW |
267 | static QemuOptsList raw_runtime_opts = { |
268 | .name = "raw", | |
269 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
270 | .desc = { | |
271 | { | |
272 | .name = "filename", | |
273 | .type = QEMU_OPT_STRING, | |
274 | .help = "File name of the image", | |
275 | }, | |
276 | { /* end of list */ } | |
277 | }, | |
278 | }; | |
279 | ||
280 | static int raw_open_common(BlockDriverState *bs, QDict *options, | |
e428e439 | 281 | int bdrv_flags, int open_flags, Error **errp) |
83f64091 FB |
282 | { |
283 | BDRVRawState *s = bs->opaque; | |
c66a6157 KW |
284 | QemuOpts *opts; |
285 | Error *local_err = NULL; | |
286 | const char *filename; | |
0e1d8f4c | 287 | int fd, ret; |
260a82e5 | 288 | struct stat st; |
83f64091 | 289 | |
87ea75d5 | 290 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
c66a6157 KW |
291 | qemu_opts_absorb_qdict(opts, options, &local_err); |
292 | if (error_is_set(&local_err)) { | |
e428e439 | 293 | error_propagate(errp, local_err); |
c66a6157 KW |
294 | ret = -EINVAL; |
295 | goto fail; | |
296 | } | |
297 | ||
298 | filename = qemu_opt_get(opts, "filename"); | |
299 | ||
1de1ae0a CE |
300 | ret = raw_normalize_devicepath(&filename); |
301 | if (ret != 0) { | |
e428e439 | 302 | error_setg_errno(errp, -ret, "Could not normalize device path"); |
c66a6157 | 303 | goto fail; |
1de1ae0a CE |
304 | } |
305 | ||
6a8dc042 JC |
306 | s->open_flags = open_flags; |
307 | raw_parse_flags(bdrv_flags, &s->open_flags); | |
83f64091 | 308 | |
90babde0 | 309 | s->fd = -1; |
40ff6d7e | 310 | fd = qemu_open(filename, s->open_flags, 0644); |
19cb3738 FB |
311 | if (fd < 0) { |
312 | ret = -errno; | |
c66a6157 | 313 | if (ret == -EROFS) { |
19cb3738 | 314 | ret = -EACCES; |
c66a6157 KW |
315 | } |
316 | goto fail; | |
19cb3738 | 317 | } |
83f64091 | 318 | s->fd = fd; |
9ef91a67 | 319 | |
5c6c3a6c | 320 | #ifdef CONFIG_LINUX_AIO |
fc32a72d | 321 | if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) { |
47e6b251 | 322 | qemu_close(fd); |
c66a6157 | 323 | ret = -errno; |
e428e439 | 324 | error_setg_errno(errp, -ret, "Could not set AIO state"); |
c66a6157 | 325 | goto fail; |
9ef91a67 | 326 | } |
fc32a72d | 327 | #endif |
9ef91a67 | 328 | |
7ce21016 | 329 | s->has_discard = true; |
97a2ae34 | 330 | s->has_write_zeroes = true; |
260a82e5 PB |
331 | |
332 | if (fstat(s->fd, &st) < 0) { | |
333 | error_setg_errno(errp, errno, "Could not stat file"); | |
334 | goto fail; | |
335 | } | |
336 | if (S_ISREG(st.st_mode)) { | |
337 | s->discard_zeroes = true; | |
338 | } | |
d0b4503e PB |
339 | if (S_ISBLK(st.st_mode)) { |
340 | #ifdef BLKDISCARDZEROES | |
341 | unsigned int arg; | |
342 | if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) { | |
343 | s->discard_zeroes = true; | |
344 | } | |
345 | #endif | |
346 | #ifdef __linux__ | |
347 | /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do | |
348 | * not rely on the contents of discarded blocks unless using O_DIRECT. | |
97a2ae34 | 349 | * Same for BLKZEROOUT. |
d0b4503e PB |
350 | */ |
351 | if (!(bs->open_flags & BDRV_O_NOCACHE)) { | |
352 | s->discard_zeroes = false; | |
97a2ae34 | 353 | s->has_write_zeroes = false; |
d0b4503e PB |
354 | } |
355 | #endif | |
356 | } | |
260a82e5 | 357 | |
dce512de CH |
358 | #ifdef CONFIG_XFS |
359 | if (platform_test_xfs_fd(s->fd)) { | |
7ce21016 | 360 | s->is_xfs = true; |
dce512de CH |
361 | } |
362 | #endif | |
363 | ||
c66a6157 KW |
364 | ret = 0; |
365 | fail: | |
366 | qemu_opts_del(opts); | |
367 | return ret; | |
83f64091 FB |
368 | } |
369 | ||
015a1036 HR |
370 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
371 | Error **errp) | |
90babde0 CH |
372 | { |
373 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
374 | Error *local_err = NULL; |
375 | int ret; | |
90babde0 CH |
376 | |
377 | s->type = FTYPE_FILE; | |
e428e439 HR |
378 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
379 | if (error_is_set(&local_err)) { | |
380 | error_propagate(errp, local_err); | |
381 | } | |
382 | return ret; | |
90babde0 CH |
383 | } |
384 | ||
eeb6b45d JC |
385 | static int raw_reopen_prepare(BDRVReopenState *state, |
386 | BlockReopenQueue *queue, Error **errp) | |
387 | { | |
388 | BDRVRawState *s; | |
389 | BDRVRawReopenState *raw_s; | |
390 | int ret = 0; | |
391 | ||
392 | assert(state != NULL); | |
393 | assert(state->bs != NULL); | |
394 | ||
395 | s = state->bs->opaque; | |
396 | ||
397 | state->opaque = g_malloc0(sizeof(BDRVRawReopenState)); | |
398 | raw_s = state->opaque; | |
399 | ||
400 | #ifdef CONFIG_LINUX_AIO | |
401 | raw_s->use_aio = s->use_aio; | |
402 | ||
403 | /* we can use s->aio_ctx instead of a copy, because the use_aio flag is | |
404 | * valid in the 'false' condition even if aio_ctx is set, and raw_set_aio() | |
405 | * won't override aio_ctx if aio_ctx is non-NULL */ | |
406 | if (raw_set_aio(&s->aio_ctx, &raw_s->use_aio, state->flags)) { | |
e428e439 | 407 | error_setg(errp, "Could not set AIO state"); |
eeb6b45d JC |
408 | return -1; |
409 | } | |
410 | #endif | |
411 | ||
1bc6b705 JC |
412 | if (s->type == FTYPE_FD || s->type == FTYPE_CD) { |
413 | raw_s->open_flags |= O_NONBLOCK; | |
414 | } | |
415 | ||
eeb6b45d JC |
416 | raw_parse_flags(state->flags, &raw_s->open_flags); |
417 | ||
418 | raw_s->fd = -1; | |
419 | ||
fdf263f6 | 420 | int fcntl_flags = O_APPEND | O_NONBLOCK; |
eeb6b45d JC |
421 | #ifdef O_NOATIME |
422 | fcntl_flags |= O_NOATIME; | |
423 | #endif | |
424 | ||
fdf263f6 AF |
425 | #ifdef O_ASYNC |
426 | /* Not all operating systems have O_ASYNC, and those that don't | |
427 | * will not let us track the state into raw_s->open_flags (typically | |
428 | * you achieve the same effect with an ioctl, for example I_SETSIG | |
429 | * on Solaris). But we do not use O_ASYNC, so that's fine. | |
430 | */ | |
431 | assert((s->open_flags & O_ASYNC) == 0); | |
432 | #endif | |
433 | ||
eeb6b45d JC |
434 | if ((raw_s->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { |
435 | /* dup the original fd */ | |
436 | /* TODO: use qemu fcntl wrapper */ | |
437 | #ifdef F_DUPFD_CLOEXEC | |
438 | raw_s->fd = fcntl(s->fd, F_DUPFD_CLOEXEC, 0); | |
439 | #else | |
440 | raw_s->fd = dup(s->fd); | |
441 | if (raw_s->fd != -1) { | |
442 | qemu_set_cloexec(raw_s->fd); | |
443 | } | |
444 | #endif | |
445 | if (raw_s->fd >= 0) { | |
446 | ret = fcntl_setfl(raw_s->fd, raw_s->open_flags); | |
447 | if (ret) { | |
448 | qemu_close(raw_s->fd); | |
449 | raw_s->fd = -1; | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
454 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ | |
455 | if (raw_s->fd == -1) { | |
456 | assert(!(raw_s->open_flags & O_CREAT)); | |
457 | raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags); | |
458 | if (raw_s->fd == -1) { | |
e428e439 | 459 | error_setg_errno(errp, errno, "Could not reopen file"); |
eeb6b45d JC |
460 | ret = -1; |
461 | } | |
462 | } | |
463 | return ret; | |
464 | } | |
465 | ||
466 | ||
467 | static void raw_reopen_commit(BDRVReopenState *state) | |
468 | { | |
469 | BDRVRawReopenState *raw_s = state->opaque; | |
470 | BDRVRawState *s = state->bs->opaque; | |
471 | ||
472 | s->open_flags = raw_s->open_flags; | |
473 | ||
474 | qemu_close(s->fd); | |
475 | s->fd = raw_s->fd; | |
476 | #ifdef CONFIG_LINUX_AIO | |
477 | s->use_aio = raw_s->use_aio; | |
478 | #endif | |
479 | ||
480 | g_free(state->opaque); | |
481 | state->opaque = NULL; | |
482 | } | |
483 | ||
484 | ||
485 | static void raw_reopen_abort(BDRVReopenState *state) | |
486 | { | |
487 | BDRVRawReopenState *raw_s = state->opaque; | |
488 | ||
489 | /* nothing to do if NULL, we didn't get far enough */ | |
490 | if (raw_s == NULL) { | |
491 | return; | |
492 | } | |
493 | ||
494 | if (raw_s->fd >= 0) { | |
495 | qemu_close(raw_s->fd); | |
496 | raw_s->fd = -1; | |
497 | } | |
498 | g_free(state->opaque); | |
499 | state->opaque = NULL; | |
500 | } | |
501 | ||
502 | ||
83f64091 FB |
503 | /* XXX: use host sector size if necessary with: |
504 | #ifdef DIOCGSECTORSIZE | |
505 | { | |
506 | unsigned int sectorsize = 512; | |
507 | if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) && | |
508 | sectorsize > bufsize) | |
509 | bufsize = sectorsize; | |
510 | } | |
511 | #endif | |
512 | #ifdef CONFIG_COCOA | |
2ee9fb48 | 513 | uint32_t blockSize = 512; |
83f64091 FB |
514 | if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) { |
515 | bufsize = blockSize; | |
516 | } | |
517 | #endif | |
518 | */ | |
519 | ||
de81a169 PB |
520 | static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb) |
521 | { | |
522 | int ret; | |
523 | ||
524 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); | |
525 | if (ret == -1) { | |
526 | return -errno; | |
527 | } | |
528 | ||
b608c8dc | 529 | return 0; |
de81a169 PB |
530 | } |
531 | ||
532 | static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb) | |
533 | { | |
534 | int ret; | |
535 | ||
536 | ret = qemu_fdatasync(aiocb->aio_fildes); | |
537 | if (ret == -1) { | |
538 | return -errno; | |
539 | } | |
540 | return 0; | |
541 | } | |
542 | ||
543 | #ifdef CONFIG_PREADV | |
544 | ||
545 | static bool preadv_present = true; | |
546 | ||
547 | static ssize_t | |
548 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
549 | { | |
550 | return preadv(fd, iov, nr_iov, offset); | |
551 | } | |
552 | ||
553 | static ssize_t | |
554 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
555 | { | |
556 | return pwritev(fd, iov, nr_iov, offset); | |
557 | } | |
558 | ||
559 | #else | |
560 | ||
561 | static bool preadv_present = false; | |
562 | ||
563 | static ssize_t | |
564 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
565 | { | |
566 | return -ENOSYS; | |
567 | } | |
568 | ||
569 | static ssize_t | |
570 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
571 | { | |
572 | return -ENOSYS; | |
573 | } | |
574 | ||
575 | #endif | |
576 | ||
577 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) | |
578 | { | |
579 | ssize_t len; | |
580 | ||
581 | do { | |
582 | if (aiocb->aio_type & QEMU_AIO_WRITE) | |
583 | len = qemu_pwritev(aiocb->aio_fildes, | |
584 | aiocb->aio_iov, | |
585 | aiocb->aio_niov, | |
586 | aiocb->aio_offset); | |
587 | else | |
588 | len = qemu_preadv(aiocb->aio_fildes, | |
589 | aiocb->aio_iov, | |
590 | aiocb->aio_niov, | |
591 | aiocb->aio_offset); | |
592 | } while (len == -1 && errno == EINTR); | |
593 | ||
594 | if (len == -1) { | |
595 | return -errno; | |
596 | } | |
597 | return len; | |
598 | } | |
599 | ||
600 | /* | |
601 | * Read/writes the data to/from a given linear buffer. | |
602 | * | |
603 | * Returns the number of bytes handles or -errno in case of an error. Short | |
604 | * reads are only returned if the end of the file is reached. | |
605 | */ | |
606 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) | |
607 | { | |
608 | ssize_t offset = 0; | |
609 | ssize_t len; | |
610 | ||
611 | while (offset < aiocb->aio_nbytes) { | |
612 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
613 | len = pwrite(aiocb->aio_fildes, | |
614 | (const char *)buf + offset, | |
615 | aiocb->aio_nbytes - offset, | |
616 | aiocb->aio_offset + offset); | |
617 | } else { | |
618 | len = pread(aiocb->aio_fildes, | |
619 | buf + offset, | |
620 | aiocb->aio_nbytes - offset, | |
621 | aiocb->aio_offset + offset); | |
622 | } | |
623 | if (len == -1 && errno == EINTR) { | |
624 | continue; | |
625 | } else if (len == -1) { | |
626 | offset = -errno; | |
627 | break; | |
628 | } else if (len == 0) { | |
629 | break; | |
630 | } | |
631 | offset += len; | |
632 | } | |
633 | ||
634 | return offset; | |
635 | } | |
636 | ||
637 | static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) | |
638 | { | |
639 | ssize_t nbytes; | |
640 | char *buf; | |
641 | ||
642 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { | |
643 | /* | |
644 | * If there is just a single buffer, and it is properly aligned | |
645 | * we can just use plain pread/pwrite without any problems. | |
646 | */ | |
647 | if (aiocb->aio_niov == 1) { | |
648 | return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base); | |
649 | } | |
650 | /* | |
651 | * We have more than one iovec, and all are properly aligned. | |
652 | * | |
653 | * Try preadv/pwritev first and fall back to linearizing the | |
654 | * buffer if it's not supported. | |
655 | */ | |
656 | if (preadv_present) { | |
657 | nbytes = handle_aiocb_rw_vector(aiocb); | |
658 | if (nbytes == aiocb->aio_nbytes || | |
659 | (nbytes < 0 && nbytes != -ENOSYS)) { | |
660 | return nbytes; | |
661 | } | |
662 | preadv_present = false; | |
663 | } | |
664 | ||
665 | /* | |
666 | * XXX(hch): short read/write. no easy way to handle the reminder | |
667 | * using these interfaces. For now retry using plain | |
668 | * pread/pwrite? | |
669 | */ | |
670 | } | |
671 | ||
672 | /* | |
673 | * Ok, we have to do it the hard way, copy all segments into | |
674 | * a single aligned buffer. | |
675 | */ | |
676 | buf = qemu_blockalign(aiocb->bs, aiocb->aio_nbytes); | |
677 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
678 | char *p = buf; | |
679 | int i; | |
680 | ||
681 | for (i = 0; i < aiocb->aio_niov; ++i) { | |
682 | memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len); | |
683 | p += aiocb->aio_iov[i].iov_len; | |
684 | } | |
685 | } | |
686 | ||
687 | nbytes = handle_aiocb_rw_linear(aiocb, buf); | |
688 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { | |
689 | char *p = buf; | |
690 | size_t count = aiocb->aio_nbytes, copy; | |
691 | int i; | |
692 | ||
693 | for (i = 0; i < aiocb->aio_niov && count; ++i) { | |
694 | copy = count; | |
695 | if (copy > aiocb->aio_iov[i].iov_len) { | |
696 | copy = aiocb->aio_iov[i].iov_len; | |
697 | } | |
698 | memcpy(aiocb->aio_iov[i].iov_base, p, copy); | |
699 | p += copy; | |
700 | count -= copy; | |
701 | } | |
702 | } | |
703 | qemu_vfree(buf); | |
704 | ||
705 | return nbytes; | |
706 | } | |
707 | ||
8238010b | 708 | #ifdef CONFIG_XFS |
97a2ae34 PB |
709 | static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes) |
710 | { | |
711 | struct xfs_flock64 fl; | |
712 | ||
713 | memset(&fl, 0, sizeof(fl)); | |
714 | fl.l_whence = SEEK_SET; | |
715 | fl.l_start = offset; | |
716 | fl.l_len = bytes; | |
717 | ||
718 | if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) { | |
719 | DEBUG_BLOCK_PRINT("cannot write zero range (%s)\n", strerror(errno)); | |
720 | return -errno; | |
721 | } | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
8238010b PB |
726 | static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes) |
727 | { | |
728 | struct xfs_flock64 fl; | |
729 | ||
730 | memset(&fl, 0, sizeof(fl)); | |
731 | fl.l_whence = SEEK_SET; | |
732 | fl.l_start = offset; | |
733 | fl.l_len = bytes; | |
734 | ||
735 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
736 | DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno)); | |
737 | return -errno; | |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | #endif | |
743 | ||
97a2ae34 PB |
744 | static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) |
745 | { | |
746 | int ret = -EOPNOTSUPP; | |
747 | BDRVRawState *s = aiocb->bs->opaque; | |
748 | ||
749 | if (s->has_write_zeroes == 0) { | |
750 | return -ENOTSUP; | |
751 | } | |
752 | ||
753 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
754 | #ifdef BLKZEROOUT | |
755 | do { | |
756 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
757 | if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) { | |
758 | return 0; | |
759 | } | |
760 | } while (errno == EINTR); | |
761 | ||
762 | ret = -errno; | |
763 | #endif | |
764 | } else { | |
765 | #ifdef CONFIG_XFS | |
766 | if (s->is_xfs) { | |
767 | return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
768 | } | |
769 | #endif | |
770 | } | |
771 | ||
772 | if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP || | |
773 | ret == -ENOTTY) { | |
774 | s->has_write_zeroes = false; | |
775 | ret = -ENOTSUP; | |
776 | } | |
777 | return ret; | |
778 | } | |
779 | ||
8238010b PB |
780 | static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb) |
781 | { | |
782 | int ret = -EOPNOTSUPP; | |
783 | BDRVRawState *s = aiocb->bs->opaque; | |
784 | ||
7ce21016 PB |
785 | if (!s->has_discard) { |
786 | return -ENOTSUP; | |
8238010b PB |
787 | } |
788 | ||
789 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
790 | #ifdef BLKDISCARD | |
791 | do { | |
792 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
793 | if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) { | |
794 | return 0; | |
795 | } | |
796 | } while (errno == EINTR); | |
797 | ||
798 | ret = -errno; | |
799 | #endif | |
800 | } else { | |
801 | #ifdef CONFIG_XFS | |
802 | if (s->is_xfs) { | |
803 | return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
804 | } | |
805 | #endif | |
806 | ||
807 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE | |
808 | do { | |
809 | if (fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, | |
810 | aiocb->aio_offset, aiocb->aio_nbytes) == 0) { | |
811 | return 0; | |
812 | } | |
813 | } while (errno == EINTR); | |
814 | ||
815 | ret = -errno; | |
816 | #endif | |
817 | } | |
818 | ||
819 | if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP || | |
820 | ret == -ENOTTY) { | |
7ce21016 PB |
821 | s->has_discard = false; |
822 | ret = -ENOTSUP; | |
8238010b PB |
823 | } |
824 | return ret; | |
825 | } | |
826 | ||
de81a169 PB |
827 | static int aio_worker(void *arg) |
828 | { | |
829 | RawPosixAIOData *aiocb = arg; | |
830 | ssize_t ret = 0; | |
831 | ||
832 | switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) { | |
833 | case QEMU_AIO_READ: | |
834 | ret = handle_aiocb_rw(aiocb); | |
835 | if (ret >= 0 && ret < aiocb->aio_nbytes && aiocb->bs->growable) { | |
836 | iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret, | |
837 | 0, aiocb->aio_nbytes - ret); | |
838 | ||
839 | ret = aiocb->aio_nbytes; | |
840 | } | |
841 | if (ret == aiocb->aio_nbytes) { | |
842 | ret = 0; | |
843 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
844 | ret = -EINVAL; | |
845 | } | |
846 | break; | |
847 | case QEMU_AIO_WRITE: | |
848 | ret = handle_aiocb_rw(aiocb); | |
849 | if (ret == aiocb->aio_nbytes) { | |
850 | ret = 0; | |
851 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
852 | ret = -EINVAL; | |
853 | } | |
854 | break; | |
855 | case QEMU_AIO_FLUSH: | |
856 | ret = handle_aiocb_flush(aiocb); | |
857 | break; | |
858 | case QEMU_AIO_IOCTL: | |
859 | ret = handle_aiocb_ioctl(aiocb); | |
860 | break; | |
8238010b PB |
861 | case QEMU_AIO_DISCARD: |
862 | ret = handle_aiocb_discard(aiocb); | |
863 | break; | |
97a2ae34 PB |
864 | case QEMU_AIO_WRITE_ZEROES: |
865 | ret = handle_aiocb_write_zeroes(aiocb); | |
866 | break; | |
de81a169 PB |
867 | default: |
868 | fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); | |
869 | ret = -EINVAL; | |
870 | break; | |
871 | } | |
872 | ||
873 | g_slice_free(RawPosixAIOData, aiocb); | |
874 | return ret; | |
875 | } | |
876 | ||
260a82e5 PB |
877 | static int paio_submit_co(BlockDriverState *bs, int fd, |
878 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
879 | int type) | |
880 | { | |
881 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
882 | ThreadPool *pool; | |
883 | ||
884 | acb->bs = bs; | |
885 | acb->aio_type = type; | |
886 | acb->aio_fildes = fd; | |
887 | ||
888 | if (qiov) { | |
889 | acb->aio_iov = qiov->iov; | |
890 | acb->aio_niov = qiov->niov; | |
891 | } | |
892 | acb->aio_nbytes = nb_sectors * 512; | |
893 | acb->aio_offset = sector_num * 512; | |
894 | ||
895 | trace_paio_submit_co(sector_num, nb_sectors, type); | |
896 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); | |
897 | return thread_pool_submit_co(pool, aio_worker, acb); | |
898 | } | |
899 | ||
de81a169 PB |
900 | static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, |
901 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
902 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
903 | { | |
904 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
c4d9d196 | 905 | ThreadPool *pool; |
de81a169 PB |
906 | |
907 | acb->bs = bs; | |
908 | acb->aio_type = type; | |
909 | acb->aio_fildes = fd; | |
910 | ||
911 | if (qiov) { | |
912 | acb->aio_iov = qiov->iov; | |
913 | acb->aio_niov = qiov->niov; | |
914 | } | |
915 | acb->aio_nbytes = nb_sectors * 512; | |
916 | acb->aio_offset = sector_num * 512; | |
917 | ||
918 | trace_paio_submit(acb, opaque, sector_num, nb_sectors, type); | |
c4d9d196 SH |
919 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
920 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
de81a169 PB |
921 | } |
922 | ||
9ef91a67 CH |
923 | static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs, |
924 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
925 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
83f64091 | 926 | { |
ce1a14dc | 927 | BDRVRawState *s = bs->opaque; |
ce1a14dc | 928 | |
19cb3738 FB |
929 | if (fd_open(bs) < 0) |
930 | return NULL; | |
931 | ||
f141eafe AL |
932 | /* |
933 | * If O_DIRECT is used the buffer needs to be aligned on a sector | |
c1ee7d56 | 934 | * boundary. Check if this is the case or tell the low-level |
9ef91a67 | 935 | * driver that it needs to copy the buffer. |
f141eafe | 936 | */ |
9acc5a06 | 937 | if ((bs->open_flags & BDRV_O_NOCACHE)) { |
c53b1c51 | 938 | if (!bdrv_qiov_is_aligned(bs, qiov)) { |
5c6c3a6c | 939 | type |= QEMU_AIO_MISALIGNED; |
e44bd6fc | 940 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c CH |
941 | } else if (s->use_aio) { |
942 | return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, | |
e44bd6fc SW |
943 | nb_sectors, cb, opaque, type); |
944 | #endif | |
5c6c3a6c | 945 | } |
9ef91a67 | 946 | } |
f141eafe | 947 | |
1e5b9d2f | 948 | return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors, |
9ef91a67 | 949 | cb, opaque, type); |
83f64091 FB |
950 | } |
951 | ||
f141eafe AL |
952 | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, |
953 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 954 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 955 | { |
9ef91a67 CH |
956 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
957 | cb, opaque, QEMU_AIO_READ); | |
83f64091 FB |
958 | } |
959 | ||
f141eafe AL |
960 | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, |
961 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 962 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 963 | { |
9ef91a67 CH |
964 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
965 | cb, opaque, QEMU_AIO_WRITE); | |
83f64091 | 966 | } |
53538725 | 967 | |
b2e12bc6 CH |
968 | static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs, |
969 | BlockDriverCompletionFunc *cb, void *opaque) | |
970 | { | |
971 | BDRVRawState *s = bs->opaque; | |
972 | ||
973 | if (fd_open(bs) < 0) | |
974 | return NULL; | |
975 | ||
1e5b9d2f | 976 | return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
b2e12bc6 CH |
977 | } |
978 | ||
83f64091 FB |
979 | static void raw_close(BlockDriverState *bs) |
980 | { | |
981 | BDRVRawState *s = bs->opaque; | |
19cb3738 | 982 | if (s->fd >= 0) { |
2e1e79da | 983 | qemu_close(s->fd); |
19cb3738 FB |
984 | s->fd = -1; |
985 | } | |
83f64091 FB |
986 | } |
987 | ||
988 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
989 | { | |
990 | BDRVRawState *s = bs->opaque; | |
55b949c8 CH |
991 | struct stat st; |
992 | ||
993 | if (fstat(s->fd, &st)) { | |
83f64091 | 994 | return -errno; |
55b949c8 CH |
995 | } |
996 | ||
997 | if (S_ISREG(st.st_mode)) { | |
998 | if (ftruncate(s->fd, offset) < 0) { | |
999 | return -errno; | |
1000 | } | |
1001 | } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1002 | if (offset > raw_getlength(bs)) { | |
1003 | return -EINVAL; | |
1004 | } | |
1005 | } else { | |
1006 | return -ENOTSUP; | |
1007 | } | |
1008 | ||
83f64091 FB |
1009 | return 0; |
1010 | } | |
1011 | ||
128ab2ff BS |
1012 | #ifdef __OpenBSD__ |
1013 | static int64_t raw_getlength(BlockDriverState *bs) | |
1014 | { | |
1015 | BDRVRawState *s = bs->opaque; | |
1016 | int fd = s->fd; | |
1017 | struct stat st; | |
1018 | ||
1019 | if (fstat(fd, &st)) | |
1020 | return -1; | |
1021 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1022 | struct disklabel dl; | |
1023 | ||
1024 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
1025 | return -1; | |
1026 | return (uint64_t)dl.d_secsize * | |
1027 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1028 | } else | |
1029 | return st.st_size; | |
1030 | } | |
d1f6fd8d CE |
1031 | #elif defined(__NetBSD__) |
1032 | static int64_t raw_getlength(BlockDriverState *bs) | |
1033 | { | |
1034 | BDRVRawState *s = bs->opaque; | |
1035 | int fd = s->fd; | |
1036 | struct stat st; | |
1037 | ||
1038 | if (fstat(fd, &st)) | |
1039 | return -1; | |
1040 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1041 | struct dkwedge_info dkw; | |
1042 | ||
1043 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
1044 | return dkw.dkw_size * 512; | |
1045 | } else { | |
1046 | struct disklabel dl; | |
1047 | ||
1048 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
1049 | return -1; | |
1050 | return (uint64_t)dl.d_secsize * | |
1051 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1052 | } | |
1053 | } else | |
1054 | return st.st_size; | |
1055 | } | |
50779cc2 CH |
1056 | #elif defined(__sun__) |
1057 | static int64_t raw_getlength(BlockDriverState *bs) | |
1058 | { | |
1059 | BDRVRawState *s = bs->opaque; | |
1060 | struct dk_minfo minfo; | |
1061 | int ret; | |
1062 | ||
1063 | ret = fd_open(bs); | |
1064 | if (ret < 0) { | |
1065 | return ret; | |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
1070 | */ | |
1071 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
1072 | if (ret != -1) { | |
1073 | return minfo.dki_lbsize * minfo.dki_capacity; | |
1074 | } | |
1075 | ||
1076 | /* | |
1077 | * There are reports that lseek on some devices fails, but | |
1078 | * irc discussion said that contingency on contingency was overkill. | |
1079 | */ | |
1080 | return lseek(s->fd, 0, SEEK_END); | |
1081 | } | |
1082 | #elif defined(CONFIG_BSD) | |
1083 | static int64_t raw_getlength(BlockDriverState *bs) | |
83f64091 FB |
1084 | { |
1085 | BDRVRawState *s = bs->opaque; | |
1086 | int fd = s->fd; | |
1087 | int64_t size; | |
83f64091 | 1088 | struct stat sb; |
a167ba50 | 1089 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a | 1090 | int reopened = 0; |
83f64091 | 1091 | #endif |
19cb3738 FB |
1092 | int ret; |
1093 | ||
1094 | ret = fd_open(bs); | |
1095 | if (ret < 0) | |
1096 | return ret; | |
83f64091 | 1097 | |
a167ba50 | 1098 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1099 | again: |
1100 | #endif | |
83f64091 FB |
1101 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
1102 | #ifdef DIOCGMEDIASIZE | |
1103 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
c5e97233 BS |
1104 | #elif defined(DIOCGPART) |
1105 | { | |
1106 | struct partinfo pi; | |
1107 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
1108 | size = pi.media_size; | |
1109 | else | |
1110 | size = 0; | |
1111 | } | |
1112 | if (size == 0) | |
83f64091 | 1113 | #endif |
83affaa6 | 1114 | #if defined(__APPLE__) && defined(__MACH__) |
83f64091 FB |
1115 | size = LONG_LONG_MAX; |
1116 | #else | |
1117 | size = lseek(fd, 0LL, SEEK_END); | |
9f23011a | 1118 | #endif |
a167ba50 | 1119 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1120 | switch(s->type) { |
1121 | case FTYPE_CD: | |
1122 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
1123 | if (size == 2048LL * (unsigned)-1) | |
1124 | size = 0; | |
1125 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 1126 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
1127 | reopened = 1; |
1128 | goto again; | |
1129 | } | |
1130 | } | |
83f64091 | 1131 | #endif |
50779cc2 | 1132 | } else { |
83f64091 FB |
1133 | size = lseek(fd, 0, SEEK_END); |
1134 | } | |
83f64091 FB |
1135 | return size; |
1136 | } | |
50779cc2 CH |
1137 | #else |
1138 | static int64_t raw_getlength(BlockDriverState *bs) | |
1139 | { | |
1140 | BDRVRawState *s = bs->opaque; | |
1141 | int ret; | |
1142 | ||
1143 | ret = fd_open(bs); | |
1144 | if (ret < 0) { | |
1145 | return ret; | |
1146 | } | |
1147 | ||
1148 | return lseek(s->fd, 0, SEEK_END); | |
1149 | } | |
128ab2ff | 1150 | #endif |
83f64091 | 1151 | |
4a1d5e1f FZ |
1152 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
1153 | { | |
1154 | struct stat st; | |
1155 | BDRVRawState *s = bs->opaque; | |
1156 | ||
1157 | if (fstat(s->fd, &st) < 0) { | |
1158 | return -errno; | |
1159 | } | |
1160 | return (int64_t)st.st_blocks * 512; | |
1161 | } | |
1162 | ||
d5124c00 HR |
1163 | static int raw_create(const char *filename, QEMUOptionParameter *options, |
1164 | Error **errp) | |
83f64091 FB |
1165 | { |
1166 | int fd; | |
1e37d059 | 1167 | int result = 0; |
0e7e1989 | 1168 | int64_t total_size = 0; |
83f64091 | 1169 | |
0e7e1989 KW |
1170 | /* Read out options */ |
1171 | while (options && options->name) { | |
1172 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
9040385d | 1173 | total_size = options->value.n / BDRV_SECTOR_SIZE; |
0e7e1989 KW |
1174 | } |
1175 | options++; | |
1176 | } | |
83f64091 | 1177 | |
6165f4d8 CB |
1178 | fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
1179 | 0644); | |
1e37d059 SW |
1180 | if (fd < 0) { |
1181 | result = -errno; | |
e428e439 | 1182 | error_setg_errno(errp, -result, "Could not create file"); |
1e37d059 | 1183 | } else { |
9040385d | 1184 | if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
1e37d059 | 1185 | result = -errno; |
e428e439 | 1186 | error_setg_errno(errp, -result, "Could not resize file"); |
1e37d059 | 1187 | } |
2e1e79da | 1188 | if (qemu_close(fd) != 0) { |
1e37d059 | 1189 | result = -errno; |
e428e439 | 1190 | error_setg_errno(errp, -result, "Could not close the new file"); |
1e37d059 SW |
1191 | } |
1192 | } | |
1193 | return result; | |
83f64091 FB |
1194 | } |
1195 | ||
5500316d PB |
1196 | /* |
1197 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1198 | * not implementing the functionality are assumed to not support backing files, | |
1199 | * hence all their sectors are reported as allocated. | |
1200 | * | |
1201 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
1202 | * and 'pnum' is set to 0. | |
1203 | * | |
1204 | * 'pnum' is set to the number of sectors (including and immediately following | |
1205 | * the specified sector) that are known to be in the same | |
1206 | * allocated/unallocated state. | |
1207 | * | |
1208 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
1209 | * beyond the end of the disk image it will be clamped. | |
1210 | */ | |
b6b8a333 | 1211 | static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, |
5500316d PB |
1212 | int64_t sector_num, |
1213 | int nb_sectors, int *pnum) | |
1214 | { | |
5500316d | 1215 | off_t start, data, hole; |
63390a8d | 1216 | int64_t ret; |
5500316d PB |
1217 | |
1218 | ret = fd_open(bs); | |
1219 | if (ret < 0) { | |
1220 | return ret; | |
1221 | } | |
1222 | ||
1223 | start = sector_num * BDRV_SECTOR_SIZE; | |
63390a8d | 1224 | ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; |
94282e71 | 1225 | |
5500316d | 1226 | #ifdef CONFIG_FIEMAP |
94282e71 KW |
1227 | |
1228 | BDRVRawState *s = bs->opaque; | |
5500316d PB |
1229 | struct { |
1230 | struct fiemap fm; | |
1231 | struct fiemap_extent fe; | |
1232 | } f; | |
94282e71 | 1233 | |
5500316d PB |
1234 | f.fm.fm_start = start; |
1235 | f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE; | |
1236 | f.fm.fm_flags = 0; | |
1237 | f.fm.fm_extent_count = 1; | |
1238 | f.fm.fm_reserved = 0; | |
1239 | if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) { | |
1240 | /* Assume everything is allocated. */ | |
1241 | *pnum = nb_sectors; | |
63390a8d | 1242 | return ret; |
5500316d PB |
1243 | } |
1244 | ||
1245 | if (f.fm.fm_mapped_extents == 0) { | |
1246 | /* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length. | |
1247 | * f.fm.fm_start + f.fm.fm_length must be clamped to the file size! | |
1248 | */ | |
1249 | off_t length = lseek(s->fd, 0, SEEK_END); | |
1250 | hole = f.fm.fm_start; | |
1251 | data = MIN(f.fm.fm_start + f.fm.fm_length, length); | |
1252 | } else { | |
1253 | data = f.fe.fe_logical; | |
1254 | hole = f.fe.fe_logical + f.fe.fe_length; | |
f5f7abcf PB |
1255 | if (f.fe.fe_flags & FIEMAP_EXTENT_UNWRITTEN) { |
1256 | ret |= BDRV_BLOCK_ZERO; | |
1257 | } | |
5500316d | 1258 | } |
94282e71 | 1259 | |
5500316d | 1260 | #elif defined SEEK_HOLE && defined SEEK_DATA |
94282e71 KW |
1261 | |
1262 | BDRVRawState *s = bs->opaque; | |
1263 | ||
5500316d PB |
1264 | hole = lseek(s->fd, start, SEEK_HOLE); |
1265 | if (hole == -1) { | |
1266 | /* -ENXIO indicates that sector_num was past the end of the file. | |
1267 | * There is a virtual hole there. */ | |
1268 | assert(errno != -ENXIO); | |
1269 | ||
1270 | /* Most likely EINVAL. Assume everything is allocated. */ | |
1271 | *pnum = nb_sectors; | |
63390a8d | 1272 | return ret; |
5500316d PB |
1273 | } |
1274 | ||
1275 | if (hole > start) { | |
1276 | data = start; | |
1277 | } else { | |
1278 | /* On a hole. We need another syscall to find its end. */ | |
1279 | data = lseek(s->fd, start, SEEK_DATA); | |
1280 | if (data == -1) { | |
1281 | data = lseek(s->fd, 0, SEEK_END); | |
1282 | } | |
1283 | } | |
1284 | #else | |
63390a8d PB |
1285 | data = 0; |
1286 | hole = start + nb_sectors * BDRV_SECTOR_SIZE; | |
5500316d PB |
1287 | #endif |
1288 | ||
1289 | if (data <= start) { | |
1290 | /* On a data extent, compute sectors to the end of the extent. */ | |
1291 | *pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); | |
5500316d PB |
1292 | } else { |
1293 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
1294 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); | |
63390a8d PB |
1295 | ret &= ~BDRV_BLOCK_DATA; |
1296 | ret |= BDRV_BLOCK_ZERO; | |
5500316d | 1297 | } |
63390a8d PB |
1298 | |
1299 | return ret; | |
5500316d PB |
1300 | } |
1301 | ||
8238010b PB |
1302 | static coroutine_fn BlockDriverAIOCB *raw_aio_discard(BlockDriverState *bs, |
1303 | int64_t sector_num, int nb_sectors, | |
1304 | BlockDriverCompletionFunc *cb, void *opaque) | |
dce512de | 1305 | { |
dce512de CH |
1306 | BDRVRawState *s = bs->opaque; |
1307 | ||
8238010b PB |
1308 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, |
1309 | cb, opaque, QEMU_AIO_DISCARD); | |
dce512de | 1310 | } |
0e7e1989 | 1311 | |
260a82e5 PB |
1312 | static int coroutine_fn raw_co_write_zeroes( |
1313 | BlockDriverState *bs, int64_t sector_num, | |
1314 | int nb_sectors, BdrvRequestFlags flags) | |
1315 | { | |
1316 | BDRVRawState *s = bs->opaque; | |
1317 | ||
1318 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1319 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1320 | QEMU_AIO_WRITE_ZEROES); | |
1321 | } else if (s->discard_zeroes) { | |
1322 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1323 | QEMU_AIO_DISCARD); | |
260a82e5 | 1324 | } |
97a2ae34 | 1325 | return -ENOTSUP; |
260a82e5 PB |
1326 | } |
1327 | ||
1328 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
1329 | { | |
1330 | BDRVRawState *s = bs->opaque; | |
1331 | ||
1332 | bdi->unallocated_blocks_are_zero = s->discard_zeroes; | |
1333 | bdi->can_write_zeroes_with_unmap = s->discard_zeroes; | |
1334 | return 0; | |
1335 | } | |
1336 | ||
0e7e1989 | 1337 | static QEMUOptionParameter raw_create_options[] = { |
db08adf5 KW |
1338 | { |
1339 | .name = BLOCK_OPT_SIZE, | |
1340 | .type = OPT_SIZE, | |
1341 | .help = "Virtual disk size" | |
1342 | }, | |
0e7e1989 KW |
1343 | { NULL } |
1344 | }; | |
1345 | ||
84a12e66 CH |
1346 | static BlockDriver bdrv_file = { |
1347 | .format_name = "file", | |
1348 | .protocol_name = "file", | |
856ae5c3 | 1349 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1350 | .bdrv_needs_filename = true, |
856ae5c3 | 1351 | .bdrv_probe = NULL, /* no probe for protocols */ |
66f82cee | 1352 | .bdrv_file_open = raw_open, |
eeb6b45d JC |
1353 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1354 | .bdrv_reopen_commit = raw_reopen_commit, | |
1355 | .bdrv_reopen_abort = raw_reopen_abort, | |
856ae5c3 BS |
1356 | .bdrv_close = raw_close, |
1357 | .bdrv_create = raw_create, | |
3ac21627 | 1358 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
b6b8a333 | 1359 | .bdrv_co_get_block_status = raw_co_get_block_status, |
260a82e5 | 1360 | .bdrv_co_write_zeroes = raw_co_write_zeroes, |
3b46e624 | 1361 | |
f141eafe AL |
1362 | .bdrv_aio_readv = raw_aio_readv, |
1363 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1364 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 1365 | .bdrv_aio_discard = raw_aio_discard, |
3c529d93 | 1366 | |
83f64091 FB |
1367 | .bdrv_truncate = raw_truncate, |
1368 | .bdrv_getlength = raw_getlength, | |
260a82e5 | 1369 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1370 | .bdrv_get_allocated_file_size |
1371 | = raw_get_allocated_file_size, | |
0e7e1989 KW |
1372 | |
1373 | .create_options = raw_create_options, | |
83f64091 FB |
1374 | }; |
1375 | ||
19cb3738 FB |
1376 | /***********************************************/ |
1377 | /* host device */ | |
1378 | ||
83affaa6 | 1379 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1380 | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); |
1381 | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); | |
1382 | ||
1383 | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) | |
1384 | { | |
5fafdf24 | 1385 | kern_return_t kernResult; |
19cb3738 FB |
1386 | mach_port_t masterPort; |
1387 | CFMutableDictionaryRef classesToMatch; | |
1388 | ||
1389 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
1390 | if ( KERN_SUCCESS != kernResult ) { | |
1391 | printf( "IOMasterPort returned %d\n", kernResult ); | |
1392 | } | |
3b46e624 | 1393 | |
5fafdf24 | 1394 | classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
19cb3738 FB |
1395 | if ( classesToMatch == NULL ) { |
1396 | printf( "IOServiceMatching returned a NULL dictionary.\n" ); | |
1397 | } else { | |
1398 | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); | |
1399 | } | |
1400 | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); | |
1401 | if ( KERN_SUCCESS != kernResult ) | |
1402 | { | |
1403 | printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); | |
1404 | } | |
3b46e624 | 1405 | |
19cb3738 FB |
1406 | return kernResult; |
1407 | } | |
1408 | ||
1409 | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) | |
1410 | { | |
1411 | io_object_t nextMedia; | |
1412 | kern_return_t kernResult = KERN_FAILURE; | |
1413 | *bsdPath = '\0'; | |
1414 | nextMedia = IOIteratorNext( mediaIterator ); | |
1415 | if ( nextMedia ) | |
1416 | { | |
1417 | CFTypeRef bsdPathAsCFString; | |
1418 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
1419 | if ( bsdPathAsCFString ) { | |
1420 | size_t devPathLength; | |
1421 | strcpy( bsdPath, _PATH_DEV ); | |
1422 | strcat( bsdPath, "r" ); | |
1423 | devPathLength = strlen( bsdPath ); | |
1424 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
1425 | kernResult = KERN_SUCCESS; | |
1426 | } | |
1427 | CFRelease( bsdPathAsCFString ); | |
1428 | } | |
1429 | IOObjectRelease( nextMedia ); | |
1430 | } | |
3b46e624 | 1431 | |
19cb3738 FB |
1432 | return kernResult; |
1433 | } | |
1434 | ||
1435 | #endif | |
1436 | ||
508c7cb3 CH |
1437 | static int hdev_probe_device(const char *filename) |
1438 | { | |
1439 | struct stat st; | |
1440 | ||
1441 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
1442 | if (strstart(filename, "/dev/cdrom", NULL)) | |
1443 | return 50; | |
1444 | ||
1445 | if (stat(filename, &st) >= 0 && | |
1446 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
1447 | return 100; | |
1448 | } | |
1449 | ||
1450 | return 0; | |
1451 | } | |
1452 | ||
da888d37 SH |
1453 | static int check_hdev_writable(BDRVRawState *s) |
1454 | { | |
1455 | #if defined(BLKROGET) | |
1456 | /* Linux block devices can be configured "read-only" using blockdev(8). | |
1457 | * This is independent of device node permissions and therefore open(2) | |
1458 | * with O_RDWR succeeds. Actual writes fail with EPERM. | |
1459 | * | |
1460 | * bdrv_open() is supposed to fail if the disk is read-only. Explicitly | |
1461 | * check for read-only block devices so that Linux block devices behave | |
1462 | * properly. | |
1463 | */ | |
1464 | struct stat st; | |
1465 | int readonly = 0; | |
1466 | ||
1467 | if (fstat(s->fd, &st)) { | |
1468 | return -errno; | |
1469 | } | |
1470 | ||
1471 | if (!S_ISBLK(st.st_mode)) { | |
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | if (ioctl(s->fd, BLKROGET, &readonly) < 0) { | |
1476 | return -errno; | |
1477 | } | |
1478 | ||
1479 | if (readonly) { | |
1480 | return -EACCES; | |
1481 | } | |
1482 | #endif /* defined(BLKROGET) */ | |
1483 | return 0; | |
1484 | } | |
1485 | ||
015a1036 HR |
1486 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
1487 | Error **errp) | |
19cb3738 FB |
1488 | { |
1489 | BDRVRawState *s = bs->opaque; | |
e428e439 | 1490 | Error *local_err = NULL; |
da888d37 | 1491 | int ret; |
c66a6157 | 1492 | const char *filename = qdict_get_str(options, "filename"); |
a76bab49 | 1493 | |
83affaa6 | 1494 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1495 | if (strstart(filename, "/dev/cdrom", NULL)) { |
1496 | kern_return_t kernResult; | |
1497 | io_iterator_t mediaIterator; | |
1498 | char bsdPath[ MAXPATHLEN ]; | |
1499 | int fd; | |
5fafdf24 | 1500 | |
19cb3738 FB |
1501 | kernResult = FindEjectableCDMedia( &mediaIterator ); |
1502 | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); | |
3b46e624 | 1503 | |
19cb3738 FB |
1504 | if ( bsdPath[ 0 ] != '\0' ) { |
1505 | strcat(bsdPath,"s0"); | |
1506 | /* some CDs don't have a partition 0 */ | |
6165f4d8 | 1507 | fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
19cb3738 FB |
1508 | if (fd < 0) { |
1509 | bsdPath[strlen(bsdPath)-1] = '1'; | |
1510 | } else { | |
2e1e79da | 1511 | qemu_close(fd); |
19cb3738 FB |
1512 | } |
1513 | filename = bsdPath; | |
a5c5ea3f | 1514 | qdict_put(options, "filename", qstring_from_str(filename)); |
19cb3738 | 1515 | } |
3b46e624 | 1516 | |
19cb3738 FB |
1517 | if ( mediaIterator ) |
1518 | IOObjectRelease( mediaIterator ); | |
1519 | } | |
1520 | #endif | |
19cb3738 FB |
1521 | |
1522 | s->type = FTYPE_FILE; | |
4dd75c70 | 1523 | #if defined(__linux__) |
05acda4d BK |
1524 | { |
1525 | char resolved_path[ MAXPATHLEN ], *temp; | |
1526 | ||
1527 | temp = realpath(filename, resolved_path); | |
1528 | if (temp && strstart(temp, "/dev/sg", NULL)) { | |
1529 | bs->sg = 1; | |
1530 | } | |
19cb3738 FB |
1531 | } |
1532 | #endif | |
90babde0 | 1533 | |
e428e439 | 1534 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
da888d37 | 1535 | if (ret < 0) { |
e428e439 HR |
1536 | if (error_is_set(&local_err)) { |
1537 | error_propagate(errp, local_err); | |
1538 | } | |
da888d37 SH |
1539 | return ret; |
1540 | } | |
1541 | ||
1542 | if (flags & BDRV_O_RDWR) { | |
1543 | ret = check_hdev_writable(s); | |
1544 | if (ret < 0) { | |
1545 | raw_close(bs); | |
e428e439 | 1546 | error_setg_errno(errp, -ret, "The device is not writable"); |
da888d37 SH |
1547 | return ret; |
1548 | } | |
1549 | } | |
1550 | ||
1551 | return ret; | |
19cb3738 FB |
1552 | } |
1553 | ||
03ff3ca3 | 1554 | #if defined(__linux__) |
19cb3738 FB |
1555 | /* Note: we do not have a reliable method to detect if the floppy is |
1556 | present. The current method is to try to open the floppy at every | |
1557 | I/O and to keep it opened during a few hundreds of ms. */ | |
1558 | static int fd_open(BlockDriverState *bs) | |
1559 | { | |
1560 | BDRVRawState *s = bs->opaque; | |
1561 | int last_media_present; | |
1562 | ||
1563 | if (s->type != FTYPE_FD) | |
1564 | return 0; | |
1565 | last_media_present = (s->fd >= 0); | |
5fafdf24 | 1566 | if (s->fd >= 0 && |
c57c846a | 1567 | (get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
2e1e79da | 1568 | qemu_close(s->fd); |
19cb3738 FB |
1569 | s->fd = -1; |
1570 | #ifdef DEBUG_FLOPPY | |
1571 | printf("Floppy closed\n"); | |
1572 | #endif | |
1573 | } | |
1574 | if (s->fd < 0) { | |
5fafdf24 | 1575 | if (s->fd_got_error && |
c57c846a | 1576 | (get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
19cb3738 FB |
1577 | #ifdef DEBUG_FLOPPY |
1578 | printf("No floppy (open delayed)\n"); | |
1579 | #endif | |
1580 | return -EIO; | |
1581 | } | |
6165f4d8 | 1582 | s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK); |
19cb3738 | 1583 | if (s->fd < 0) { |
c57c846a | 1584 | s->fd_error_time = get_clock(); |
19cb3738 FB |
1585 | s->fd_got_error = 1; |
1586 | if (last_media_present) | |
1587 | s->fd_media_changed = 1; | |
1588 | #ifdef DEBUG_FLOPPY | |
1589 | printf("No floppy\n"); | |
1590 | #endif | |
1591 | return -EIO; | |
1592 | } | |
1593 | #ifdef DEBUG_FLOPPY | |
1594 | printf("Floppy opened\n"); | |
1595 | #endif | |
1596 | } | |
1597 | if (!last_media_present) | |
1598 | s->fd_media_changed = 1; | |
c57c846a | 1599 | s->fd_open_time = get_clock(); |
19cb3738 FB |
1600 | s->fd_got_error = 0; |
1601 | return 0; | |
1602 | } | |
19cb3738 | 1603 | |
63ec93db | 1604 | static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
985a03b0 TS |
1605 | { |
1606 | BDRVRawState *s = bs->opaque; | |
1607 | ||
1608 | return ioctl(s->fd, req, buf); | |
1609 | } | |
221f715d | 1610 | |
63ec93db | 1611 | static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
221f715d AL |
1612 | unsigned long int req, void *buf, |
1613 | BlockDriverCompletionFunc *cb, void *opaque) | |
1614 | { | |
f141eafe | 1615 | BDRVRawState *s = bs->opaque; |
c208e8c2 | 1616 | RawPosixAIOData *acb; |
c4d9d196 | 1617 | ThreadPool *pool; |
221f715d | 1618 | |
f141eafe AL |
1619 | if (fd_open(bs) < 0) |
1620 | return NULL; | |
c208e8c2 PB |
1621 | |
1622 | acb = g_slice_new(RawPosixAIOData); | |
1623 | acb->bs = bs; | |
1624 | acb->aio_type = QEMU_AIO_IOCTL; | |
1625 | acb->aio_fildes = s->fd; | |
1626 | acb->aio_offset = 0; | |
1627 | acb->aio_ioctl_buf = buf; | |
1628 | acb->aio_ioctl_cmd = req; | |
c4d9d196 SH |
1629 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1630 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
221f715d AL |
1631 | } |
1632 | ||
a167ba50 | 1633 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1634 | static int fd_open(BlockDriverState *bs) |
1635 | { | |
1636 | BDRVRawState *s = bs->opaque; | |
1637 | ||
1638 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
1639 | if (s->fd >= 0) | |
1640 | return 0; | |
1641 | return -EIO; | |
1642 | } | |
9f23011a | 1643 | #else /* !linux && !FreeBSD */ |
19cb3738 | 1644 | |
08af02e2 AL |
1645 | static int fd_open(BlockDriverState *bs) |
1646 | { | |
1647 | return 0; | |
1648 | } | |
1649 | ||
221f715d | 1650 | #endif /* !linux && !FreeBSD */ |
04eeb8b6 | 1651 | |
c36dd8a0 AF |
1652 | static coroutine_fn BlockDriverAIOCB *hdev_aio_discard(BlockDriverState *bs, |
1653 | int64_t sector_num, int nb_sectors, | |
1654 | BlockDriverCompletionFunc *cb, void *opaque) | |
1655 | { | |
1656 | BDRVRawState *s = bs->opaque; | |
1657 | ||
1658 | if (fd_open(bs) < 0) { | |
1659 | return NULL; | |
1660 | } | |
1661 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, | |
1662 | cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
1663 | } | |
1664 | ||
d0b4503e PB |
1665 | static coroutine_fn int hdev_co_write_zeroes(BlockDriverState *bs, |
1666 | int64_t sector_num, int nb_sectors, BdrvRequestFlags flags) | |
1667 | { | |
1668 | BDRVRawState *s = bs->opaque; | |
1669 | int rc; | |
1670 | ||
1671 | rc = fd_open(bs); | |
1672 | if (rc < 0) { | |
1673 | return rc; | |
1674 | } | |
1675 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1676 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1677 | QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV); | |
1678 | } else if (s->discard_zeroes) { | |
1679 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1680 | QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
d0b4503e | 1681 | } |
97a2ae34 | 1682 | return -ENOTSUP; |
d0b4503e PB |
1683 | } |
1684 | ||
d5124c00 HR |
1685 | static int hdev_create(const char *filename, QEMUOptionParameter *options, |
1686 | Error **errp) | |
93c65b47 AL |
1687 | { |
1688 | int fd; | |
1689 | int ret = 0; | |
1690 | struct stat stat_buf; | |
0e7e1989 | 1691 | int64_t total_size = 0; |
93c65b47 | 1692 | |
0e7e1989 KW |
1693 | /* Read out options */ |
1694 | while (options && options->name) { | |
1695 | if (!strcmp(options->name, "size")) { | |
9040385d | 1696 | total_size = options->value.n / BDRV_SECTOR_SIZE; |
0e7e1989 KW |
1697 | } |
1698 | options++; | |
1699 | } | |
93c65b47 | 1700 | |
6165f4d8 | 1701 | fd = qemu_open(filename, O_WRONLY | O_BINARY); |
e428e439 HR |
1702 | if (fd < 0) { |
1703 | ret = -errno; | |
1704 | error_setg_errno(errp, -ret, "Could not open device"); | |
1705 | return ret; | |
1706 | } | |
93c65b47 | 1707 | |
e428e439 | 1708 | if (fstat(fd, &stat_buf) < 0) { |
57e69b7d | 1709 | ret = -errno; |
e428e439 HR |
1710 | error_setg_errno(errp, -ret, "Could not stat device"); |
1711 | } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) { | |
1712 | error_setg(errp, | |
1713 | "The given file is neither a block nor a character device"); | |
57e69b7d | 1714 | ret = -ENODEV; |
e428e439 HR |
1715 | } else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) { |
1716 | error_setg(errp, "Device is too small"); | |
93c65b47 | 1717 | ret = -ENOSPC; |
e428e439 | 1718 | } |
93c65b47 | 1719 | |
2e1e79da | 1720 | qemu_close(fd); |
93c65b47 AL |
1721 | return ret; |
1722 | } | |
1723 | ||
5efa9d5a | 1724 | static BlockDriver bdrv_host_device = { |
0b4ce02e | 1725 | .format_name = "host_device", |
84a12e66 | 1726 | .protocol_name = "host_device", |
0b4ce02e | 1727 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1728 | .bdrv_needs_filename = true, |
0b4ce02e | 1729 | .bdrv_probe_device = hdev_probe_device, |
66f82cee | 1730 | .bdrv_file_open = hdev_open, |
0b4ce02e | 1731 | .bdrv_close = raw_close, |
1bc6b705 JC |
1732 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1733 | .bdrv_reopen_commit = raw_reopen_commit, | |
1734 | .bdrv_reopen_abort = raw_reopen_abort, | |
93c65b47 | 1735 | .bdrv_create = hdev_create, |
0b4ce02e | 1736 | .create_options = raw_create_options, |
d0b4503e | 1737 | .bdrv_co_write_zeroes = hdev_co_write_zeroes, |
3b46e624 | 1738 | |
f141eafe AL |
1739 | .bdrv_aio_readv = raw_aio_readv, |
1740 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1741 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 1742 | .bdrv_aio_discard = hdev_aio_discard, |
3c529d93 | 1743 | |
55b949c8 | 1744 | .bdrv_truncate = raw_truncate, |
e60f469c | 1745 | .bdrv_getlength = raw_getlength, |
260a82e5 | 1746 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1747 | .bdrv_get_allocated_file_size |
1748 | = raw_get_allocated_file_size, | |
19cb3738 | 1749 | |
f3a5d3f8 | 1750 | /* generic scsi device */ |
63ec93db CH |
1751 | #ifdef __linux__ |
1752 | .bdrv_ioctl = hdev_ioctl, | |
63ec93db CH |
1753 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
1754 | #endif | |
f3a5d3f8 CH |
1755 | }; |
1756 | ||
1757 | #ifdef __linux__ | |
015a1036 HR |
1758 | static int floppy_open(BlockDriverState *bs, QDict *options, int flags, |
1759 | Error **errp) | |
f3a5d3f8 CH |
1760 | { |
1761 | BDRVRawState *s = bs->opaque; | |
e428e439 | 1762 | Error *local_err = NULL; |
f3a5d3f8 CH |
1763 | int ret; |
1764 | ||
f3a5d3f8 | 1765 | s->type = FTYPE_FD; |
f3a5d3f8 | 1766 | |
19a3da7f | 1767 | /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ |
e428e439 HR |
1768 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
1769 | if (ret) { | |
1770 | if (error_is_set(&local_err)) { | |
1771 | error_propagate(errp, local_err); | |
1772 | } | |
f3a5d3f8 | 1773 | return ret; |
e428e439 | 1774 | } |
f3a5d3f8 CH |
1775 | |
1776 | /* close fd so that we can reopen it as needed */ | |
2e1e79da | 1777 | qemu_close(s->fd); |
f3a5d3f8 CH |
1778 | s->fd = -1; |
1779 | s->fd_media_changed = 1; | |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | ||
508c7cb3 CH |
1784 | static int floppy_probe_device(const char *filename) |
1785 | { | |
2ebf7c4b CR |
1786 | int fd, ret; |
1787 | int prio = 0; | |
1788 | struct floppy_struct fdparam; | |
343f8568 | 1789 | struct stat st; |
2ebf7c4b | 1790 | |
e1740828 CB |
1791 | if (strstart(filename, "/dev/fd", NULL) && |
1792 | !strstart(filename, "/dev/fdset/", NULL)) { | |
2ebf7c4b | 1793 | prio = 50; |
e1740828 | 1794 | } |
2ebf7c4b | 1795 | |
6165f4d8 | 1796 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
2ebf7c4b CR |
1797 | if (fd < 0) { |
1798 | goto out; | |
1799 | } | |
343f8568 JS |
1800 | ret = fstat(fd, &st); |
1801 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
1802 | goto outc; | |
1803 | } | |
2ebf7c4b CR |
1804 | |
1805 | /* Attempt to detect via a floppy specific ioctl */ | |
1806 | ret = ioctl(fd, FDGETPRM, &fdparam); | |
1807 | if (ret >= 0) | |
1808 | prio = 100; | |
1809 | ||
343f8568 | 1810 | outc: |
2e1e79da | 1811 | qemu_close(fd); |
2ebf7c4b CR |
1812 | out: |
1813 | return prio; | |
508c7cb3 CH |
1814 | } |
1815 | ||
1816 | ||
f3a5d3f8 CH |
1817 | static int floppy_is_inserted(BlockDriverState *bs) |
1818 | { | |
1819 | return fd_open(bs) >= 0; | |
1820 | } | |
1821 | ||
1822 | static int floppy_media_changed(BlockDriverState *bs) | |
1823 | { | |
1824 | BDRVRawState *s = bs->opaque; | |
1825 | int ret; | |
1826 | ||
1827 | /* | |
1828 | * XXX: we do not have a true media changed indication. | |
1829 | * It does not work if the floppy is changed without trying to read it. | |
1830 | */ | |
1831 | fd_open(bs); | |
1832 | ret = s->fd_media_changed; | |
1833 | s->fd_media_changed = 0; | |
1834 | #ifdef DEBUG_FLOPPY | |
1835 | printf("Floppy changed=%d\n", ret); | |
1836 | #endif | |
1837 | return ret; | |
1838 | } | |
1839 | ||
f36f3949 | 1840 | static void floppy_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
1841 | { |
1842 | BDRVRawState *s = bs->opaque; | |
1843 | int fd; | |
1844 | ||
1845 | if (s->fd >= 0) { | |
2e1e79da | 1846 | qemu_close(s->fd); |
f3a5d3f8 CH |
1847 | s->fd = -1; |
1848 | } | |
6165f4d8 | 1849 | fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK); |
f3a5d3f8 CH |
1850 | if (fd >= 0) { |
1851 | if (ioctl(fd, FDEJECT, 0) < 0) | |
1852 | perror("FDEJECT"); | |
2e1e79da | 1853 | qemu_close(fd); |
f3a5d3f8 | 1854 | } |
f3a5d3f8 CH |
1855 | } |
1856 | ||
1857 | static BlockDriver bdrv_host_floppy = { | |
1858 | .format_name = "host_floppy", | |
84a12e66 | 1859 | .protocol_name = "host_floppy", |
f3a5d3f8 | 1860 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1861 | .bdrv_needs_filename = true, |
508c7cb3 | 1862 | .bdrv_probe_device = floppy_probe_device, |
66f82cee | 1863 | .bdrv_file_open = floppy_open, |
f3a5d3f8 | 1864 | .bdrv_close = raw_close, |
1bc6b705 JC |
1865 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1866 | .bdrv_reopen_commit = raw_reopen_commit, | |
1867 | .bdrv_reopen_abort = raw_reopen_abort, | |
f3a5d3f8 | 1868 | .bdrv_create = hdev_create, |
0b4ce02e | 1869 | .create_options = raw_create_options, |
f3a5d3f8 | 1870 | |
f3a5d3f8 CH |
1871 | .bdrv_aio_readv = raw_aio_readv, |
1872 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1873 | .bdrv_aio_flush = raw_aio_flush, |
f3a5d3f8 | 1874 | |
55b949c8 | 1875 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
1876 | .bdrv_getlength = raw_getlength, |
1877 | .has_variable_length = true, | |
4a1d5e1f FZ |
1878 | .bdrv_get_allocated_file_size |
1879 | = raw_get_allocated_file_size, | |
f3a5d3f8 CH |
1880 | |
1881 | /* removable device support */ | |
1882 | .bdrv_is_inserted = floppy_is_inserted, | |
1883 | .bdrv_media_changed = floppy_media_changed, | |
1884 | .bdrv_eject = floppy_eject, | |
f3a5d3f8 CH |
1885 | }; |
1886 | ||
015a1036 HR |
1887 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
1888 | Error **errp) | |
f3a5d3f8 CH |
1889 | { |
1890 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
1891 | Error *local_err = NULL; |
1892 | int ret; | |
f3a5d3f8 | 1893 | |
f3a5d3f8 CH |
1894 | s->type = FTYPE_CD; |
1895 | ||
19a3da7f | 1896 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
e428e439 HR |
1897 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
1898 | if (error_is_set(&local_err)) { | |
1899 | error_propagate(errp, local_err); | |
1900 | } | |
1901 | return ret; | |
f3a5d3f8 CH |
1902 | } |
1903 | ||
508c7cb3 CH |
1904 | static int cdrom_probe_device(const char *filename) |
1905 | { | |
3baf720e CR |
1906 | int fd, ret; |
1907 | int prio = 0; | |
343f8568 | 1908 | struct stat st; |
3baf720e | 1909 | |
6165f4d8 | 1910 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
3baf720e CR |
1911 | if (fd < 0) { |
1912 | goto out; | |
1913 | } | |
343f8568 JS |
1914 | ret = fstat(fd, &st); |
1915 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
1916 | goto outc; | |
1917 | } | |
3baf720e CR |
1918 | |
1919 | /* Attempt to detect via a CDROM specific ioctl */ | |
1920 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
1921 | if (ret >= 0) | |
1922 | prio = 100; | |
1923 | ||
343f8568 | 1924 | outc: |
2e1e79da | 1925 | qemu_close(fd); |
3baf720e CR |
1926 | out: |
1927 | return prio; | |
508c7cb3 CH |
1928 | } |
1929 | ||
f3a5d3f8 CH |
1930 | static int cdrom_is_inserted(BlockDriverState *bs) |
1931 | { | |
1932 | BDRVRawState *s = bs->opaque; | |
1933 | int ret; | |
1934 | ||
1935 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
1936 | if (ret == CDS_DISC_OK) | |
1937 | return 1; | |
1938 | return 0; | |
1939 | } | |
1940 | ||
f36f3949 | 1941 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
1942 | { |
1943 | BDRVRawState *s = bs->opaque; | |
1944 | ||
1945 | if (eject_flag) { | |
1946 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
1947 | perror("CDROMEJECT"); | |
1948 | } else { | |
1949 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
1950 | perror("CDROMEJECT"); | |
1951 | } | |
f3a5d3f8 CH |
1952 | } |
1953 | ||
025e849a | 1954 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
1955 | { |
1956 | BDRVRawState *s = bs->opaque; | |
1957 | ||
1958 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
1959 | /* | |
1960 | * Note: an error can happen if the distribution automatically | |
1961 | * mounts the CD-ROM | |
1962 | */ | |
1963 | /* perror("CDROM_LOCKDOOR"); */ | |
1964 | } | |
f3a5d3f8 CH |
1965 | } |
1966 | ||
1967 | static BlockDriver bdrv_host_cdrom = { | |
1968 | .format_name = "host_cdrom", | |
84a12e66 | 1969 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 1970 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1971 | .bdrv_needs_filename = true, |
508c7cb3 | 1972 | .bdrv_probe_device = cdrom_probe_device, |
66f82cee | 1973 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 1974 | .bdrv_close = raw_close, |
1bc6b705 JC |
1975 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1976 | .bdrv_reopen_commit = raw_reopen_commit, | |
1977 | .bdrv_reopen_abort = raw_reopen_abort, | |
f3a5d3f8 | 1978 | .bdrv_create = hdev_create, |
0b4ce02e | 1979 | .create_options = raw_create_options, |
f3a5d3f8 | 1980 | |
f3a5d3f8 CH |
1981 | .bdrv_aio_readv = raw_aio_readv, |
1982 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1983 | .bdrv_aio_flush = raw_aio_flush, |
f3a5d3f8 | 1984 | |
55b949c8 | 1985 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
1986 | .bdrv_getlength = raw_getlength, |
1987 | .has_variable_length = true, | |
4a1d5e1f FZ |
1988 | .bdrv_get_allocated_file_size |
1989 | = raw_get_allocated_file_size, | |
f3a5d3f8 CH |
1990 | |
1991 | /* removable device support */ | |
1992 | .bdrv_is_inserted = cdrom_is_inserted, | |
1993 | .bdrv_eject = cdrom_eject, | |
025e849a | 1994 | .bdrv_lock_medium = cdrom_lock_medium, |
f3a5d3f8 CH |
1995 | |
1996 | /* generic scsi device */ | |
63ec93db | 1997 | .bdrv_ioctl = hdev_ioctl, |
63ec93db | 1998 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
f3a5d3f8 CH |
1999 | }; |
2000 | #endif /* __linux__ */ | |
2001 | ||
a167ba50 | 2002 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
511018e4 AT |
2003 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2004 | Error **errp) | |
f3a5d3f8 CH |
2005 | { |
2006 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2007 | Error *local_err = NULL; |
f3a5d3f8 CH |
2008 | int ret; |
2009 | ||
2010 | s->type = FTYPE_CD; | |
2011 | ||
e428e439 HR |
2012 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
2013 | if (ret) { | |
2014 | if (error_is_set(&local_err)) { | |
2015 | error_propagate(errp, local_err); | |
2016 | } | |
f3a5d3f8 | 2017 | return ret; |
e428e439 | 2018 | } |
f3a5d3f8 | 2019 | |
9b2260cb | 2020 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2021 | ioctl(s->fd, CDIOCALLOW); |
2022 | return 0; | |
2023 | } | |
2024 | ||
508c7cb3 CH |
2025 | static int cdrom_probe_device(const char *filename) |
2026 | { | |
2027 | if (strstart(filename, "/dev/cd", NULL) || | |
2028 | strstart(filename, "/dev/acd", NULL)) | |
2029 | return 100; | |
2030 | return 0; | |
2031 | } | |
2032 | ||
f3a5d3f8 CH |
2033 | static int cdrom_reopen(BlockDriverState *bs) |
2034 | { | |
2035 | BDRVRawState *s = bs->opaque; | |
2036 | int fd; | |
2037 | ||
2038 | /* | |
2039 | * Force reread of possibly changed/newly loaded disc, | |
2040 | * FreeBSD seems to not notice sometimes... | |
2041 | */ | |
2042 | if (s->fd >= 0) | |
2e1e79da | 2043 | qemu_close(s->fd); |
6165f4d8 | 2044 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
f3a5d3f8 CH |
2045 | if (fd < 0) { |
2046 | s->fd = -1; | |
2047 | return -EIO; | |
2048 | } | |
2049 | s->fd = fd; | |
2050 | ||
9b2260cb | 2051 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2052 | ioctl(s->fd, CDIOCALLOW); |
2053 | return 0; | |
2054 | } | |
2055 | ||
2056 | static int cdrom_is_inserted(BlockDriverState *bs) | |
2057 | { | |
2058 | return raw_getlength(bs) > 0; | |
2059 | } | |
2060 | ||
f36f3949 | 2061 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2062 | { |
2063 | BDRVRawState *s = bs->opaque; | |
2064 | ||
2065 | if (s->fd < 0) | |
822e1cd1 | 2066 | return; |
f3a5d3f8 CH |
2067 | |
2068 | (void) ioctl(s->fd, CDIOCALLOW); | |
2069 | ||
2070 | if (eject_flag) { | |
2071 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
2072 | perror("CDIOCEJECT"); | |
2073 | } else { | |
2074 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
2075 | perror("CDIOCCLOSE"); | |
2076 | } | |
2077 | ||
822e1cd1 | 2078 | cdrom_reopen(bs); |
f3a5d3f8 CH |
2079 | } |
2080 | ||
025e849a | 2081 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2082 | { |
2083 | BDRVRawState *s = bs->opaque; | |
2084 | ||
2085 | if (s->fd < 0) | |
7bf37fed | 2086 | return; |
f3a5d3f8 CH |
2087 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
2088 | /* | |
2089 | * Note: an error can happen if the distribution automatically | |
2090 | * mounts the CD-ROM | |
2091 | */ | |
2092 | /* perror("CDROM_LOCKDOOR"); */ | |
2093 | } | |
f3a5d3f8 CH |
2094 | } |
2095 | ||
2096 | static BlockDriver bdrv_host_cdrom = { | |
2097 | .format_name = "host_cdrom", | |
84a12e66 | 2098 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2099 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2100 | .bdrv_needs_filename = true, |
508c7cb3 | 2101 | .bdrv_probe_device = cdrom_probe_device, |
66f82cee | 2102 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2103 | .bdrv_close = raw_close, |
1bc6b705 JC |
2104 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2105 | .bdrv_reopen_commit = raw_reopen_commit, | |
2106 | .bdrv_reopen_abort = raw_reopen_abort, | |
f3a5d3f8 | 2107 | .bdrv_create = hdev_create, |
0b4ce02e | 2108 | .create_options = raw_create_options, |
f3a5d3f8 | 2109 | |
f3a5d3f8 CH |
2110 | .bdrv_aio_readv = raw_aio_readv, |
2111 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2112 | .bdrv_aio_flush = raw_aio_flush, |
f3a5d3f8 | 2113 | |
55b949c8 | 2114 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2115 | .bdrv_getlength = raw_getlength, |
2116 | .has_variable_length = true, | |
4a1d5e1f FZ |
2117 | .bdrv_get_allocated_file_size |
2118 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2119 | |
19cb3738 | 2120 | /* removable device support */ |
f3a5d3f8 CH |
2121 | .bdrv_is_inserted = cdrom_is_inserted, |
2122 | .bdrv_eject = cdrom_eject, | |
025e849a | 2123 | .bdrv_lock_medium = cdrom_lock_medium, |
19cb3738 | 2124 | }; |
f3a5d3f8 | 2125 | #endif /* __FreeBSD__ */ |
5efa9d5a | 2126 | |
4065742a SH |
2127 | #ifdef CONFIG_LINUX_AIO |
2128 | /** | |
2129 | * Return the file descriptor for Linux AIO | |
2130 | * | |
2131 | * This function is a layering violation and should be removed when it becomes | |
2132 | * possible to call the block layer outside the global mutex. It allows the | |
2133 | * caller to hijack the file descriptor so I/O can be performed outside the | |
2134 | * block layer. | |
2135 | */ | |
2136 | int raw_get_aio_fd(BlockDriverState *bs) | |
2137 | { | |
2138 | BDRVRawState *s; | |
2139 | ||
2140 | if (!bs->drv) { | |
2141 | return -ENOMEDIUM; | |
2142 | } | |
2143 | ||
2144 | if (bs->drv == bdrv_find_format("raw")) { | |
2145 | bs = bs->file; | |
2146 | } | |
2147 | ||
2148 | /* raw-posix has several protocols so just check for raw_aio_readv */ | |
2149 | if (bs->drv->bdrv_aio_readv != raw_aio_readv) { | |
2150 | return -ENOTSUP; | |
2151 | } | |
2152 | ||
2153 | s = bs->opaque; | |
2154 | if (!s->use_aio) { | |
2155 | return -ENOTSUP; | |
2156 | } | |
2157 | return s->fd; | |
2158 | } | |
2159 | #endif /* CONFIG_LINUX_AIO */ | |
2160 | ||
84a12e66 | 2161 | static void bdrv_file_init(void) |
5efa9d5a | 2162 | { |
508c7cb3 CH |
2163 | /* |
2164 | * Register all the drivers. Note that order is important, the driver | |
2165 | * registered last will get probed first. | |
2166 | */ | |
84a12e66 | 2167 | bdrv_register(&bdrv_file); |
5efa9d5a | 2168 | bdrv_register(&bdrv_host_device); |
f3a5d3f8 CH |
2169 | #ifdef __linux__ |
2170 | bdrv_register(&bdrv_host_floppy); | |
2171 | bdrv_register(&bdrv_host_cdrom); | |
2172 | #endif | |
a167ba50 | 2173 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
2174 | bdrv_register(&bdrv_host_cdrom); |
2175 | #endif | |
5efa9d5a AL |
2176 | } |
2177 | ||
84a12e66 | 2178 | block_init(bdrv_file_init); |