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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" |
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; |
c25f53b0 PB |
130 | size_t buf_align; |
131 | ||
19cb3738 FB |
132 | #if defined(__linux__) |
133 | /* linux floppy specific */ | |
19cb3738 FB |
134 | int64_t fd_open_time; |
135 | int64_t fd_error_time; | |
136 | int fd_got_error; | |
137 | int fd_media_changed; | |
83f64091 | 138 | #endif |
e44bd6fc | 139 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c | 140 | int use_aio; |
1e5b9d2f | 141 | void *aio_ctx; |
e44bd6fc | 142 | #endif |
dce512de | 143 | #ifdef CONFIG_XFS |
260a82e5 | 144 | bool is_xfs:1; |
dce512de | 145 | #endif |
260a82e5 | 146 | bool has_discard:1; |
97a2ae34 | 147 | bool has_write_zeroes:1; |
260a82e5 | 148 | bool discard_zeroes:1; |
4f11aa8a HR |
149 | #ifdef CONFIG_FIEMAP |
150 | bool skip_fiemap; | |
151 | #endif | |
19cb3738 FB |
152 | } BDRVRawState; |
153 | ||
eeb6b45d JC |
154 | typedef struct BDRVRawReopenState { |
155 | int fd; | |
156 | int open_flags; | |
157 | #ifdef CONFIG_LINUX_AIO | |
158 | int use_aio; | |
159 | #endif | |
160 | } BDRVRawReopenState; | |
161 | ||
19cb3738 | 162 | static int fd_open(BlockDriverState *bs); |
22afa7b5 | 163 | static int64_t raw_getlength(BlockDriverState *bs); |
83f64091 | 164 | |
de81a169 PB |
165 | typedef struct RawPosixAIOData { |
166 | BlockDriverState *bs; | |
167 | int aio_fildes; | |
168 | union { | |
169 | struct iovec *aio_iov; | |
170 | void *aio_ioctl_buf; | |
171 | }; | |
172 | int aio_niov; | |
8238010b | 173 | uint64_t aio_nbytes; |
de81a169 PB |
174 | #define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */ |
175 | off_t aio_offset; | |
176 | int aio_type; | |
177 | } RawPosixAIOData; | |
178 | ||
a167ba50 | 179 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 | 180 | static int cdrom_reopen(BlockDriverState *bs); |
9f23011a BS |
181 | #endif |
182 | ||
1de1ae0a CE |
183 | #if defined(__NetBSD__) |
184 | static int raw_normalize_devicepath(const char **filename) | |
185 | { | |
186 | static char namebuf[PATH_MAX]; | |
187 | const char *dp, *fname; | |
188 | struct stat sb; | |
189 | ||
190 | fname = *filename; | |
191 | dp = strrchr(fname, '/'); | |
192 | if (lstat(fname, &sb) < 0) { | |
193 | fprintf(stderr, "%s: stat failed: %s\n", | |
194 | fname, strerror(errno)); | |
195 | return -errno; | |
196 | } | |
197 | ||
198 | if (!S_ISBLK(sb.st_mode)) { | |
199 | return 0; | |
200 | } | |
201 | ||
202 | if (dp == NULL) { | |
203 | snprintf(namebuf, PATH_MAX, "r%s", fname); | |
204 | } else { | |
205 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", | |
206 | (int)(dp - fname), fname, dp + 1); | |
207 | } | |
208 | fprintf(stderr, "%s is a block device", fname); | |
209 | *filename = namebuf; | |
210 | fprintf(stderr, ", using %s\n", *filename); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | #else | |
215 | static int raw_normalize_devicepath(const char **filename) | |
216 | { | |
217 | return 0; | |
218 | } | |
219 | #endif | |
220 | ||
c25f53b0 PB |
221 | static void raw_probe_alignment(BlockDriverState *bs) |
222 | { | |
223 | BDRVRawState *s = bs->opaque; | |
224 | char *buf; | |
225 | unsigned int sector_size; | |
226 | ||
227 | /* For /dev/sg devices the alignment is not really used. | |
228 | With buffered I/O, we don't have any restrictions. */ | |
229 | if (bs->sg || !(s->open_flags & O_DIRECT)) { | |
230 | bs->request_alignment = 1; | |
231 | s->buf_align = 1; | |
232 | return; | |
233 | } | |
234 | ||
235 | /* Try a few ioctls to get the right size */ | |
236 | bs->request_alignment = 0; | |
237 | s->buf_align = 0; | |
238 | ||
239 | #ifdef BLKSSZGET | |
240 | if (ioctl(s->fd, BLKSSZGET, §or_size) >= 0) { | |
241 | bs->request_alignment = sector_size; | |
242 | } | |
243 | #endif | |
244 | #ifdef DKIOCGETBLOCKSIZE | |
245 | if (ioctl(s->fd, DKIOCGETBLOCKSIZE, §or_size) >= 0) { | |
246 | bs->request_alignment = sector_size; | |
247 | } | |
248 | #endif | |
249 | #ifdef DIOCGSECTORSIZE | |
250 | if (ioctl(s->fd, DIOCGSECTORSIZE, §or_size) >= 0) { | |
251 | bs->request_alignment = sector_size; | |
252 | } | |
253 | #endif | |
254 | #ifdef CONFIG_XFS | |
255 | if (s->is_xfs) { | |
256 | struct dioattr da; | |
257 | if (xfsctl(NULL, s->fd, XFS_IOC_DIOINFO, &da) >= 0) { | |
258 | bs->request_alignment = da.d_miniosz; | |
259 | /* The kernel returns wrong information for d_mem */ | |
260 | /* s->buf_align = da.d_mem; */ | |
261 | } | |
262 | } | |
263 | #endif | |
264 | ||
265 | /* If we could not get the sizes so far, we can only guess them */ | |
266 | if (!s->buf_align) { | |
267 | size_t align; | |
268 | buf = qemu_memalign(MAX_BLOCKSIZE, 2 * MAX_BLOCKSIZE); | |
269 | for (align = 512; align <= MAX_BLOCKSIZE; align <<= 1) { | |
270 | if (pread(s->fd, buf + align, MAX_BLOCKSIZE, 0) >= 0) { | |
271 | s->buf_align = align; | |
272 | break; | |
273 | } | |
274 | } | |
275 | qemu_vfree(buf); | |
276 | } | |
277 | ||
278 | if (!bs->request_alignment) { | |
279 | size_t align; | |
280 | buf = qemu_memalign(s->buf_align, MAX_BLOCKSIZE); | |
281 | for (align = 512; align <= MAX_BLOCKSIZE; align <<= 1) { | |
282 | if (pread(s->fd, buf, align, 0) >= 0) { | |
283 | bs->request_alignment = align; | |
284 | break; | |
285 | } | |
286 | } | |
287 | qemu_vfree(buf); | |
288 | } | |
289 | } | |
290 | ||
6a8dc042 JC |
291 | static void raw_parse_flags(int bdrv_flags, int *open_flags) |
292 | { | |
293 | assert(open_flags != NULL); | |
294 | ||
295 | *open_flags |= O_BINARY; | |
296 | *open_flags &= ~O_ACCMODE; | |
297 | if (bdrv_flags & BDRV_O_RDWR) { | |
298 | *open_flags |= O_RDWR; | |
299 | } else { | |
300 | *open_flags |= O_RDONLY; | |
301 | } | |
302 | ||
303 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
304 | * and O_DIRECT for no caching. */ | |
305 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
306 | *open_flags |= O_DIRECT; | |
307 | } | |
6a8dc042 JC |
308 | } |
309 | ||
c2f3426c SH |
310 | static void raw_detach_aio_context(BlockDriverState *bs) |
311 | { | |
312 | #ifdef CONFIG_LINUX_AIO | |
313 | BDRVRawState *s = bs->opaque; | |
314 | ||
315 | if (s->use_aio) { | |
316 | laio_detach_aio_context(s->aio_ctx, bdrv_get_aio_context(bs)); | |
317 | } | |
318 | #endif | |
319 | } | |
320 | ||
321 | static void raw_attach_aio_context(BlockDriverState *bs, | |
322 | AioContext *new_context) | |
323 | { | |
324 | #ifdef CONFIG_LINUX_AIO | |
325 | BDRVRawState *s = bs->opaque; | |
326 | ||
327 | if (s->use_aio) { | |
328 | laio_attach_aio_context(s->aio_ctx, new_context); | |
329 | } | |
330 | #endif | |
331 | } | |
332 | ||
fc32a72d JC |
333 | #ifdef CONFIG_LINUX_AIO |
334 | static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) | |
335 | { | |
336 | int ret = -1; | |
337 | assert(aio_ctx != NULL); | |
338 | assert(use_aio != NULL); | |
339 | /* | |
340 | * Currently Linux do AIO only for files opened with O_DIRECT | |
341 | * specified so check NOCACHE flag too | |
342 | */ | |
343 | if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) == | |
344 | (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { | |
345 | ||
346 | /* if non-NULL, laio_init() has already been run */ | |
347 | if (*aio_ctx == NULL) { | |
348 | *aio_ctx = laio_init(); | |
349 | if (!*aio_ctx) { | |
350 | goto error; | |
351 | } | |
352 | } | |
353 | *use_aio = 1; | |
354 | } else { | |
355 | *use_aio = 0; | |
356 | } | |
357 | ||
358 | ret = 0; | |
359 | ||
360 | error: | |
361 | return ret; | |
362 | } | |
363 | #endif | |
364 | ||
078896a9 HR |
365 | static void raw_parse_filename(const char *filename, QDict *options, |
366 | Error **errp) | |
367 | { | |
368 | /* The filename does not have to be prefixed by the protocol name, since | |
369 | * "file" is the default protocol; therefore, the return value of this | |
370 | * function call can be ignored. */ | |
371 | strstart(filename, "file:", &filename); | |
372 | ||
373 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
374 | } | |
375 | ||
c66a6157 KW |
376 | static QemuOptsList raw_runtime_opts = { |
377 | .name = "raw", | |
378 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
379 | .desc = { | |
380 | { | |
381 | .name = "filename", | |
382 | .type = QEMU_OPT_STRING, | |
383 | .help = "File name of the image", | |
384 | }, | |
385 | { /* end of list */ } | |
386 | }, | |
387 | }; | |
388 | ||
389 | static int raw_open_common(BlockDriverState *bs, QDict *options, | |
e428e439 | 390 | int bdrv_flags, int open_flags, Error **errp) |
83f64091 FB |
391 | { |
392 | BDRVRawState *s = bs->opaque; | |
c66a6157 KW |
393 | QemuOpts *opts; |
394 | Error *local_err = NULL; | |
8bfea15d | 395 | const char *filename = NULL; |
0e1d8f4c | 396 | int fd, ret; |
260a82e5 | 397 | struct stat st; |
83f64091 | 398 | |
87ea75d5 | 399 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
c66a6157 | 400 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 401 | if (local_err) { |
e428e439 | 402 | error_propagate(errp, local_err); |
c66a6157 KW |
403 | ret = -EINVAL; |
404 | goto fail; | |
405 | } | |
406 | ||
407 | filename = qemu_opt_get(opts, "filename"); | |
408 | ||
1de1ae0a CE |
409 | ret = raw_normalize_devicepath(&filename); |
410 | if (ret != 0) { | |
e428e439 | 411 | error_setg_errno(errp, -ret, "Could not normalize device path"); |
c66a6157 | 412 | goto fail; |
1de1ae0a CE |
413 | } |
414 | ||
6a8dc042 JC |
415 | s->open_flags = open_flags; |
416 | raw_parse_flags(bdrv_flags, &s->open_flags); | |
83f64091 | 417 | |
90babde0 | 418 | s->fd = -1; |
40ff6d7e | 419 | fd = qemu_open(filename, s->open_flags, 0644); |
19cb3738 FB |
420 | if (fd < 0) { |
421 | ret = -errno; | |
c66a6157 | 422 | if (ret == -EROFS) { |
19cb3738 | 423 | ret = -EACCES; |
c66a6157 KW |
424 | } |
425 | goto fail; | |
19cb3738 | 426 | } |
83f64091 | 427 | s->fd = fd; |
9ef91a67 | 428 | |
5c6c3a6c | 429 | #ifdef CONFIG_LINUX_AIO |
fc32a72d | 430 | if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) { |
47e6b251 | 431 | qemu_close(fd); |
c66a6157 | 432 | ret = -errno; |
e428e439 | 433 | error_setg_errno(errp, -ret, "Could not set AIO state"); |
c66a6157 | 434 | goto fail; |
9ef91a67 | 435 | } |
fc32a72d | 436 | #endif |
9ef91a67 | 437 | |
7ce21016 | 438 | s->has_discard = true; |
97a2ae34 | 439 | s->has_write_zeroes = true; |
260a82e5 PB |
440 | |
441 | if (fstat(s->fd, &st) < 0) { | |
442 | error_setg_errno(errp, errno, "Could not stat file"); | |
443 | goto fail; | |
444 | } | |
445 | if (S_ISREG(st.st_mode)) { | |
446 | s->discard_zeroes = true; | |
447 | } | |
d0b4503e PB |
448 | if (S_ISBLK(st.st_mode)) { |
449 | #ifdef BLKDISCARDZEROES | |
450 | unsigned int arg; | |
451 | if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) { | |
452 | s->discard_zeroes = true; | |
453 | } | |
454 | #endif | |
455 | #ifdef __linux__ | |
456 | /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do | |
457 | * not rely on the contents of discarded blocks unless using O_DIRECT. | |
97a2ae34 | 458 | * Same for BLKZEROOUT. |
d0b4503e PB |
459 | */ |
460 | if (!(bs->open_flags & BDRV_O_NOCACHE)) { | |
461 | s->discard_zeroes = false; | |
97a2ae34 | 462 | s->has_write_zeroes = false; |
d0b4503e PB |
463 | } |
464 | #endif | |
465 | } | |
260a82e5 | 466 | |
dce512de CH |
467 | #ifdef CONFIG_XFS |
468 | if (platform_test_xfs_fd(s->fd)) { | |
7ce21016 | 469 | s->is_xfs = true; |
dce512de CH |
470 | } |
471 | #endif | |
472 | ||
c2f3426c SH |
473 | raw_attach_aio_context(bs, bdrv_get_aio_context(bs)); |
474 | ||
c66a6157 KW |
475 | ret = 0; |
476 | fail: | |
8bfea15d KW |
477 | if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { |
478 | unlink(filename); | |
479 | } | |
c66a6157 KW |
480 | qemu_opts_del(opts); |
481 | return ret; | |
83f64091 FB |
482 | } |
483 | ||
015a1036 HR |
484 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
485 | Error **errp) | |
90babde0 CH |
486 | { |
487 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
488 | Error *local_err = NULL; |
489 | int ret; | |
90babde0 CH |
490 | |
491 | s->type = FTYPE_FILE; | |
e428e439 | 492 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
84d18f06 | 493 | if (local_err) { |
e428e439 HR |
494 | error_propagate(errp, local_err); |
495 | } | |
496 | return ret; | |
90babde0 CH |
497 | } |
498 | ||
eeb6b45d JC |
499 | static int raw_reopen_prepare(BDRVReopenState *state, |
500 | BlockReopenQueue *queue, Error **errp) | |
501 | { | |
502 | BDRVRawState *s; | |
503 | BDRVRawReopenState *raw_s; | |
504 | int ret = 0; | |
505 | ||
506 | assert(state != NULL); | |
507 | assert(state->bs != NULL); | |
508 | ||
509 | s = state->bs->opaque; | |
510 | ||
511 | state->opaque = g_malloc0(sizeof(BDRVRawReopenState)); | |
512 | raw_s = state->opaque; | |
513 | ||
514 | #ifdef CONFIG_LINUX_AIO | |
515 | raw_s->use_aio = s->use_aio; | |
516 | ||
517 | /* we can use s->aio_ctx instead of a copy, because the use_aio flag is | |
518 | * valid in the 'false' condition even if aio_ctx is set, and raw_set_aio() | |
519 | * won't override aio_ctx if aio_ctx is non-NULL */ | |
520 | if (raw_set_aio(&s->aio_ctx, &raw_s->use_aio, state->flags)) { | |
e428e439 | 521 | error_setg(errp, "Could not set AIO state"); |
eeb6b45d JC |
522 | return -1; |
523 | } | |
524 | #endif | |
525 | ||
1bc6b705 JC |
526 | if (s->type == FTYPE_FD || s->type == FTYPE_CD) { |
527 | raw_s->open_flags |= O_NONBLOCK; | |
528 | } | |
529 | ||
eeb6b45d JC |
530 | raw_parse_flags(state->flags, &raw_s->open_flags); |
531 | ||
532 | raw_s->fd = -1; | |
533 | ||
fdf263f6 | 534 | int fcntl_flags = O_APPEND | O_NONBLOCK; |
eeb6b45d JC |
535 | #ifdef O_NOATIME |
536 | fcntl_flags |= O_NOATIME; | |
537 | #endif | |
538 | ||
fdf263f6 AF |
539 | #ifdef O_ASYNC |
540 | /* Not all operating systems have O_ASYNC, and those that don't | |
541 | * will not let us track the state into raw_s->open_flags (typically | |
542 | * you achieve the same effect with an ioctl, for example I_SETSIG | |
543 | * on Solaris). But we do not use O_ASYNC, so that's fine. | |
544 | */ | |
545 | assert((s->open_flags & O_ASYNC) == 0); | |
546 | #endif | |
547 | ||
eeb6b45d JC |
548 | if ((raw_s->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { |
549 | /* dup the original fd */ | |
550 | /* TODO: use qemu fcntl wrapper */ | |
551 | #ifdef F_DUPFD_CLOEXEC | |
552 | raw_s->fd = fcntl(s->fd, F_DUPFD_CLOEXEC, 0); | |
553 | #else | |
554 | raw_s->fd = dup(s->fd); | |
555 | if (raw_s->fd != -1) { | |
556 | qemu_set_cloexec(raw_s->fd); | |
557 | } | |
558 | #endif | |
559 | if (raw_s->fd >= 0) { | |
560 | ret = fcntl_setfl(raw_s->fd, raw_s->open_flags); | |
561 | if (ret) { | |
562 | qemu_close(raw_s->fd); | |
563 | raw_s->fd = -1; | |
564 | } | |
565 | } | |
566 | } | |
567 | ||
568 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ | |
569 | if (raw_s->fd == -1) { | |
570 | assert(!(raw_s->open_flags & O_CREAT)); | |
571 | raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags); | |
572 | if (raw_s->fd == -1) { | |
e428e439 | 573 | error_setg_errno(errp, errno, "Could not reopen file"); |
eeb6b45d JC |
574 | ret = -1; |
575 | } | |
576 | } | |
577 | return ret; | |
578 | } | |
579 | ||
eeb6b45d JC |
580 | static void raw_reopen_commit(BDRVReopenState *state) |
581 | { | |
582 | BDRVRawReopenState *raw_s = state->opaque; | |
583 | BDRVRawState *s = state->bs->opaque; | |
584 | ||
585 | s->open_flags = raw_s->open_flags; | |
586 | ||
587 | qemu_close(s->fd); | |
588 | s->fd = raw_s->fd; | |
589 | #ifdef CONFIG_LINUX_AIO | |
590 | s->use_aio = raw_s->use_aio; | |
591 | #endif | |
592 | ||
593 | g_free(state->opaque); | |
594 | state->opaque = NULL; | |
595 | } | |
596 | ||
597 | ||
598 | static void raw_reopen_abort(BDRVReopenState *state) | |
599 | { | |
600 | BDRVRawReopenState *raw_s = state->opaque; | |
601 | ||
602 | /* nothing to do if NULL, we didn't get far enough */ | |
603 | if (raw_s == NULL) { | |
604 | return; | |
605 | } | |
606 | ||
607 | if (raw_s->fd >= 0) { | |
608 | qemu_close(raw_s->fd); | |
609 | raw_s->fd = -1; | |
610 | } | |
611 | g_free(state->opaque); | |
612 | state->opaque = NULL; | |
613 | } | |
614 | ||
c25f53b0 PB |
615 | static int raw_refresh_limits(BlockDriverState *bs) |
616 | { | |
617 | BDRVRawState *s = bs->opaque; | |
eeb6b45d | 618 | |
c25f53b0 PB |
619 | raw_probe_alignment(bs); |
620 | bs->bl.opt_mem_alignment = s->buf_align; | |
621 | ||
622 | return 0; | |
623 | } | |
83f64091 | 624 | |
de81a169 PB |
625 | static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb) |
626 | { | |
627 | int ret; | |
628 | ||
629 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); | |
630 | if (ret == -1) { | |
631 | return -errno; | |
632 | } | |
633 | ||
b608c8dc | 634 | return 0; |
de81a169 PB |
635 | } |
636 | ||
637 | static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb) | |
638 | { | |
639 | int ret; | |
640 | ||
641 | ret = qemu_fdatasync(aiocb->aio_fildes); | |
642 | if (ret == -1) { | |
643 | return -errno; | |
644 | } | |
645 | return 0; | |
646 | } | |
647 | ||
648 | #ifdef CONFIG_PREADV | |
649 | ||
650 | static bool preadv_present = true; | |
651 | ||
652 | static ssize_t | |
653 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
654 | { | |
655 | return preadv(fd, iov, nr_iov, offset); | |
656 | } | |
657 | ||
658 | static ssize_t | |
659 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
660 | { | |
661 | return pwritev(fd, iov, nr_iov, offset); | |
662 | } | |
663 | ||
664 | #else | |
665 | ||
666 | static bool preadv_present = false; | |
667 | ||
668 | static ssize_t | |
669 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
670 | { | |
671 | return -ENOSYS; | |
672 | } | |
673 | ||
674 | static ssize_t | |
675 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
676 | { | |
677 | return -ENOSYS; | |
678 | } | |
679 | ||
680 | #endif | |
681 | ||
682 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) | |
683 | { | |
684 | ssize_t len; | |
685 | ||
686 | do { | |
687 | if (aiocb->aio_type & QEMU_AIO_WRITE) | |
688 | len = qemu_pwritev(aiocb->aio_fildes, | |
689 | aiocb->aio_iov, | |
690 | aiocb->aio_niov, | |
691 | aiocb->aio_offset); | |
692 | else | |
693 | len = qemu_preadv(aiocb->aio_fildes, | |
694 | aiocb->aio_iov, | |
695 | aiocb->aio_niov, | |
696 | aiocb->aio_offset); | |
697 | } while (len == -1 && errno == EINTR); | |
698 | ||
699 | if (len == -1) { | |
700 | return -errno; | |
701 | } | |
702 | return len; | |
703 | } | |
704 | ||
705 | /* | |
706 | * Read/writes the data to/from a given linear buffer. | |
707 | * | |
708 | * Returns the number of bytes handles or -errno in case of an error. Short | |
709 | * reads are only returned if the end of the file is reached. | |
710 | */ | |
711 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) | |
712 | { | |
713 | ssize_t offset = 0; | |
714 | ssize_t len; | |
715 | ||
716 | while (offset < aiocb->aio_nbytes) { | |
717 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
718 | len = pwrite(aiocb->aio_fildes, | |
719 | (const char *)buf + offset, | |
720 | aiocb->aio_nbytes - offset, | |
721 | aiocb->aio_offset + offset); | |
722 | } else { | |
723 | len = pread(aiocb->aio_fildes, | |
724 | buf + offset, | |
725 | aiocb->aio_nbytes - offset, | |
726 | aiocb->aio_offset + offset); | |
727 | } | |
728 | if (len == -1 && errno == EINTR) { | |
729 | continue; | |
730 | } else if (len == -1) { | |
731 | offset = -errno; | |
732 | break; | |
733 | } else if (len == 0) { | |
734 | break; | |
735 | } | |
736 | offset += len; | |
737 | } | |
738 | ||
739 | return offset; | |
740 | } | |
741 | ||
742 | static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) | |
743 | { | |
744 | ssize_t nbytes; | |
745 | char *buf; | |
746 | ||
747 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { | |
748 | /* | |
749 | * If there is just a single buffer, and it is properly aligned | |
750 | * we can just use plain pread/pwrite without any problems. | |
751 | */ | |
752 | if (aiocb->aio_niov == 1) { | |
753 | return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base); | |
754 | } | |
755 | /* | |
756 | * We have more than one iovec, and all are properly aligned. | |
757 | * | |
758 | * Try preadv/pwritev first and fall back to linearizing the | |
759 | * buffer if it's not supported. | |
760 | */ | |
761 | if (preadv_present) { | |
762 | nbytes = handle_aiocb_rw_vector(aiocb); | |
763 | if (nbytes == aiocb->aio_nbytes || | |
764 | (nbytes < 0 && nbytes != -ENOSYS)) { | |
765 | return nbytes; | |
766 | } | |
767 | preadv_present = false; | |
768 | } | |
769 | ||
770 | /* | |
771 | * XXX(hch): short read/write. no easy way to handle the reminder | |
772 | * using these interfaces. For now retry using plain | |
773 | * pread/pwrite? | |
774 | */ | |
775 | } | |
776 | ||
777 | /* | |
778 | * Ok, we have to do it the hard way, copy all segments into | |
779 | * a single aligned buffer. | |
780 | */ | |
781 | buf = qemu_blockalign(aiocb->bs, aiocb->aio_nbytes); | |
782 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
783 | char *p = buf; | |
784 | int i; | |
785 | ||
786 | for (i = 0; i < aiocb->aio_niov; ++i) { | |
787 | memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len); | |
788 | p += aiocb->aio_iov[i].iov_len; | |
789 | } | |
790 | } | |
791 | ||
792 | nbytes = handle_aiocb_rw_linear(aiocb, buf); | |
793 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { | |
794 | char *p = buf; | |
795 | size_t count = aiocb->aio_nbytes, copy; | |
796 | int i; | |
797 | ||
798 | for (i = 0; i < aiocb->aio_niov && count; ++i) { | |
799 | copy = count; | |
800 | if (copy > aiocb->aio_iov[i].iov_len) { | |
801 | copy = aiocb->aio_iov[i].iov_len; | |
802 | } | |
803 | memcpy(aiocb->aio_iov[i].iov_base, p, copy); | |
804 | p += copy; | |
805 | count -= copy; | |
806 | } | |
807 | } | |
808 | qemu_vfree(buf); | |
809 | ||
810 | return nbytes; | |
811 | } | |
812 | ||
8238010b | 813 | #ifdef CONFIG_XFS |
97a2ae34 PB |
814 | static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes) |
815 | { | |
816 | struct xfs_flock64 fl; | |
817 | ||
818 | memset(&fl, 0, sizeof(fl)); | |
819 | fl.l_whence = SEEK_SET; | |
820 | fl.l_start = offset; | |
821 | fl.l_len = bytes; | |
822 | ||
823 | if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) { | |
824 | DEBUG_BLOCK_PRINT("cannot write zero range (%s)\n", strerror(errno)); | |
825 | return -errno; | |
826 | } | |
827 | ||
828 | return 0; | |
829 | } | |
830 | ||
8238010b PB |
831 | static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes) |
832 | { | |
833 | struct xfs_flock64 fl; | |
834 | ||
835 | memset(&fl, 0, sizeof(fl)); | |
836 | fl.l_whence = SEEK_SET; | |
837 | fl.l_start = offset; | |
838 | fl.l_len = bytes; | |
839 | ||
840 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
841 | DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno)); | |
842 | return -errno; | |
843 | } | |
844 | ||
845 | return 0; | |
846 | } | |
847 | #endif | |
848 | ||
97a2ae34 PB |
849 | static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) |
850 | { | |
851 | int ret = -EOPNOTSUPP; | |
852 | BDRVRawState *s = aiocb->bs->opaque; | |
853 | ||
854 | if (s->has_write_zeroes == 0) { | |
855 | return -ENOTSUP; | |
856 | } | |
857 | ||
858 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
859 | #ifdef BLKZEROOUT | |
860 | do { | |
861 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
862 | if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) { | |
863 | return 0; | |
864 | } | |
865 | } while (errno == EINTR); | |
866 | ||
867 | ret = -errno; | |
868 | #endif | |
869 | } else { | |
870 | #ifdef CONFIG_XFS | |
871 | if (s->is_xfs) { | |
872 | return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
873 | } | |
874 | #endif | |
875 | } | |
876 | ||
877 | if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP || | |
878 | ret == -ENOTTY) { | |
879 | s->has_write_zeroes = false; | |
880 | ret = -ENOTSUP; | |
881 | } | |
882 | return ret; | |
883 | } | |
884 | ||
8238010b PB |
885 | static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb) |
886 | { | |
887 | int ret = -EOPNOTSUPP; | |
888 | BDRVRawState *s = aiocb->bs->opaque; | |
889 | ||
7ce21016 PB |
890 | if (!s->has_discard) { |
891 | return -ENOTSUP; | |
8238010b PB |
892 | } |
893 | ||
894 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
895 | #ifdef BLKDISCARD | |
896 | do { | |
897 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
898 | if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) { | |
899 | return 0; | |
900 | } | |
901 | } while (errno == EINTR); | |
902 | ||
903 | ret = -errno; | |
904 | #endif | |
905 | } else { | |
906 | #ifdef CONFIG_XFS | |
907 | if (s->is_xfs) { | |
908 | return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
909 | } | |
910 | #endif | |
911 | ||
912 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE | |
913 | do { | |
914 | if (fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, | |
915 | aiocb->aio_offset, aiocb->aio_nbytes) == 0) { | |
916 | return 0; | |
917 | } | |
918 | } while (errno == EINTR); | |
919 | ||
920 | ret = -errno; | |
921 | #endif | |
922 | } | |
923 | ||
924 | if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP || | |
925 | ret == -ENOTTY) { | |
7ce21016 PB |
926 | s->has_discard = false; |
927 | ret = -ENOTSUP; | |
8238010b PB |
928 | } |
929 | return ret; | |
930 | } | |
931 | ||
de81a169 PB |
932 | static int aio_worker(void *arg) |
933 | { | |
934 | RawPosixAIOData *aiocb = arg; | |
935 | ssize_t ret = 0; | |
936 | ||
937 | switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) { | |
938 | case QEMU_AIO_READ: | |
939 | ret = handle_aiocb_rw(aiocb); | |
940 | if (ret >= 0 && ret < aiocb->aio_nbytes && aiocb->bs->growable) { | |
941 | iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret, | |
942 | 0, aiocb->aio_nbytes - ret); | |
943 | ||
944 | ret = aiocb->aio_nbytes; | |
945 | } | |
946 | if (ret == aiocb->aio_nbytes) { | |
947 | ret = 0; | |
948 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
949 | ret = -EINVAL; | |
950 | } | |
951 | break; | |
952 | case QEMU_AIO_WRITE: | |
953 | ret = handle_aiocb_rw(aiocb); | |
954 | if (ret == aiocb->aio_nbytes) { | |
955 | ret = 0; | |
956 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
957 | ret = -EINVAL; | |
958 | } | |
959 | break; | |
960 | case QEMU_AIO_FLUSH: | |
961 | ret = handle_aiocb_flush(aiocb); | |
962 | break; | |
963 | case QEMU_AIO_IOCTL: | |
964 | ret = handle_aiocb_ioctl(aiocb); | |
965 | break; | |
8238010b PB |
966 | case QEMU_AIO_DISCARD: |
967 | ret = handle_aiocb_discard(aiocb); | |
968 | break; | |
97a2ae34 PB |
969 | case QEMU_AIO_WRITE_ZEROES: |
970 | ret = handle_aiocb_write_zeroes(aiocb); | |
971 | break; | |
de81a169 PB |
972 | default: |
973 | fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); | |
974 | ret = -EINVAL; | |
975 | break; | |
976 | } | |
977 | ||
978 | g_slice_free(RawPosixAIOData, aiocb); | |
979 | return ret; | |
980 | } | |
981 | ||
260a82e5 PB |
982 | static int paio_submit_co(BlockDriverState *bs, int fd, |
983 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
984 | int type) | |
985 | { | |
986 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
987 | ThreadPool *pool; | |
988 | ||
989 | acb->bs = bs; | |
990 | acb->aio_type = type; | |
991 | acb->aio_fildes = fd; | |
992 | ||
993 | if (qiov) { | |
994 | acb->aio_iov = qiov->iov; | |
995 | acb->aio_niov = qiov->niov; | |
996 | } | |
997 | acb->aio_nbytes = nb_sectors * 512; | |
998 | acb->aio_offset = sector_num * 512; | |
999 | ||
1000 | trace_paio_submit_co(sector_num, nb_sectors, type); | |
1001 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); | |
1002 | return thread_pool_submit_co(pool, aio_worker, acb); | |
1003 | } | |
1004 | ||
de81a169 PB |
1005 | static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, |
1006 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1007 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
1008 | { | |
1009 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
c4d9d196 | 1010 | ThreadPool *pool; |
de81a169 PB |
1011 | |
1012 | acb->bs = bs; | |
1013 | acb->aio_type = type; | |
1014 | acb->aio_fildes = fd; | |
1015 | ||
1016 | if (qiov) { | |
1017 | acb->aio_iov = qiov->iov; | |
1018 | acb->aio_niov = qiov->niov; | |
1019 | } | |
1020 | acb->aio_nbytes = nb_sectors * 512; | |
1021 | acb->aio_offset = sector_num * 512; | |
1022 | ||
1023 | trace_paio_submit(acb, opaque, sector_num, nb_sectors, type); | |
c4d9d196 SH |
1024 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1025 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
de81a169 PB |
1026 | } |
1027 | ||
9ef91a67 CH |
1028 | static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs, |
1029 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1030 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
83f64091 | 1031 | { |
ce1a14dc | 1032 | BDRVRawState *s = bs->opaque; |
ce1a14dc | 1033 | |
19cb3738 FB |
1034 | if (fd_open(bs) < 0) |
1035 | return NULL; | |
1036 | ||
f141eafe AL |
1037 | /* |
1038 | * If O_DIRECT is used the buffer needs to be aligned on a sector | |
c1ee7d56 | 1039 | * boundary. Check if this is the case or tell the low-level |
9ef91a67 | 1040 | * driver that it needs to copy the buffer. |
f141eafe | 1041 | */ |
9acc5a06 | 1042 | if ((bs->open_flags & BDRV_O_NOCACHE)) { |
c53b1c51 | 1043 | if (!bdrv_qiov_is_aligned(bs, qiov)) { |
5c6c3a6c | 1044 | type |= QEMU_AIO_MISALIGNED; |
e44bd6fc | 1045 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c CH |
1046 | } else if (s->use_aio) { |
1047 | return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, | |
e44bd6fc SW |
1048 | nb_sectors, cb, opaque, type); |
1049 | #endif | |
5c6c3a6c | 1050 | } |
9ef91a67 | 1051 | } |
f141eafe | 1052 | |
1e5b9d2f | 1053 | return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors, |
9ef91a67 | 1054 | cb, opaque, type); |
83f64091 FB |
1055 | } |
1056 | ||
f141eafe AL |
1057 | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, |
1058 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 1059 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 1060 | { |
9ef91a67 CH |
1061 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
1062 | cb, opaque, QEMU_AIO_READ); | |
83f64091 FB |
1063 | } |
1064 | ||
f141eafe AL |
1065 | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, |
1066 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 1067 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 1068 | { |
9ef91a67 CH |
1069 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
1070 | cb, opaque, QEMU_AIO_WRITE); | |
83f64091 | 1071 | } |
53538725 | 1072 | |
b2e12bc6 CH |
1073 | static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs, |
1074 | BlockDriverCompletionFunc *cb, void *opaque) | |
1075 | { | |
1076 | BDRVRawState *s = bs->opaque; | |
1077 | ||
1078 | if (fd_open(bs) < 0) | |
1079 | return NULL; | |
1080 | ||
1e5b9d2f | 1081 | return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
b2e12bc6 CH |
1082 | } |
1083 | ||
83f64091 FB |
1084 | static void raw_close(BlockDriverState *bs) |
1085 | { | |
1086 | BDRVRawState *s = bs->opaque; | |
c2f3426c SH |
1087 | |
1088 | raw_detach_aio_context(bs); | |
1089 | ||
abd269b7 SH |
1090 | #ifdef CONFIG_LINUX_AIO |
1091 | if (s->use_aio) { | |
1092 | laio_cleanup(s->aio_ctx); | |
1093 | } | |
1094 | #endif | |
19cb3738 | 1095 | if (s->fd >= 0) { |
2e1e79da | 1096 | qemu_close(s->fd); |
19cb3738 FB |
1097 | s->fd = -1; |
1098 | } | |
83f64091 FB |
1099 | } |
1100 | ||
1101 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
1102 | { | |
1103 | BDRVRawState *s = bs->opaque; | |
55b949c8 CH |
1104 | struct stat st; |
1105 | ||
1106 | if (fstat(s->fd, &st)) { | |
83f64091 | 1107 | return -errno; |
55b949c8 CH |
1108 | } |
1109 | ||
1110 | if (S_ISREG(st.st_mode)) { | |
1111 | if (ftruncate(s->fd, offset) < 0) { | |
1112 | return -errno; | |
1113 | } | |
1114 | } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1115 | if (offset > raw_getlength(bs)) { | |
1116 | return -EINVAL; | |
1117 | } | |
1118 | } else { | |
1119 | return -ENOTSUP; | |
1120 | } | |
1121 | ||
83f64091 FB |
1122 | return 0; |
1123 | } | |
1124 | ||
128ab2ff BS |
1125 | #ifdef __OpenBSD__ |
1126 | static int64_t raw_getlength(BlockDriverState *bs) | |
1127 | { | |
1128 | BDRVRawState *s = bs->opaque; | |
1129 | int fd = s->fd; | |
1130 | struct stat st; | |
1131 | ||
1132 | if (fstat(fd, &st)) | |
1133 | return -1; | |
1134 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1135 | struct disklabel dl; | |
1136 | ||
1137 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
1138 | return -1; | |
1139 | return (uint64_t)dl.d_secsize * | |
1140 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1141 | } else | |
1142 | return st.st_size; | |
1143 | } | |
d1f6fd8d CE |
1144 | #elif defined(__NetBSD__) |
1145 | static int64_t raw_getlength(BlockDriverState *bs) | |
1146 | { | |
1147 | BDRVRawState *s = bs->opaque; | |
1148 | int fd = s->fd; | |
1149 | struct stat st; | |
1150 | ||
1151 | if (fstat(fd, &st)) | |
1152 | return -1; | |
1153 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1154 | struct dkwedge_info dkw; | |
1155 | ||
1156 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
1157 | return dkw.dkw_size * 512; | |
1158 | } else { | |
1159 | struct disklabel dl; | |
1160 | ||
1161 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
1162 | return -1; | |
1163 | return (uint64_t)dl.d_secsize * | |
1164 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1165 | } | |
1166 | } else | |
1167 | return st.st_size; | |
1168 | } | |
50779cc2 CH |
1169 | #elif defined(__sun__) |
1170 | static int64_t raw_getlength(BlockDriverState *bs) | |
1171 | { | |
1172 | BDRVRawState *s = bs->opaque; | |
1173 | struct dk_minfo minfo; | |
1174 | int ret; | |
1175 | ||
1176 | ret = fd_open(bs); | |
1177 | if (ret < 0) { | |
1178 | return ret; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
1183 | */ | |
1184 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
1185 | if (ret != -1) { | |
1186 | return minfo.dki_lbsize * minfo.dki_capacity; | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * There are reports that lseek on some devices fails, but | |
1191 | * irc discussion said that contingency on contingency was overkill. | |
1192 | */ | |
1193 | return lseek(s->fd, 0, SEEK_END); | |
1194 | } | |
1195 | #elif defined(CONFIG_BSD) | |
1196 | static int64_t raw_getlength(BlockDriverState *bs) | |
83f64091 FB |
1197 | { |
1198 | BDRVRawState *s = bs->opaque; | |
1199 | int fd = s->fd; | |
1200 | int64_t size; | |
83f64091 | 1201 | struct stat sb; |
a167ba50 | 1202 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a | 1203 | int reopened = 0; |
83f64091 | 1204 | #endif |
19cb3738 FB |
1205 | int ret; |
1206 | ||
1207 | ret = fd_open(bs); | |
1208 | if (ret < 0) | |
1209 | return ret; | |
83f64091 | 1210 | |
a167ba50 | 1211 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1212 | again: |
1213 | #endif | |
83f64091 FB |
1214 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
1215 | #ifdef DIOCGMEDIASIZE | |
1216 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
c5e97233 BS |
1217 | #elif defined(DIOCGPART) |
1218 | { | |
1219 | struct partinfo pi; | |
1220 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
1221 | size = pi.media_size; | |
1222 | else | |
1223 | size = 0; | |
1224 | } | |
1225 | if (size == 0) | |
83f64091 | 1226 | #endif |
83affaa6 | 1227 | #if defined(__APPLE__) && defined(__MACH__) |
675036e4 | 1228 | size = LLONG_MAX; |
83f64091 FB |
1229 | #else |
1230 | size = lseek(fd, 0LL, SEEK_END); | |
9f23011a | 1231 | #endif |
a167ba50 | 1232 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1233 | switch(s->type) { |
1234 | case FTYPE_CD: | |
1235 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
1236 | if (size == 2048LL * (unsigned)-1) | |
1237 | size = 0; | |
1238 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 1239 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
1240 | reopened = 1; |
1241 | goto again; | |
1242 | } | |
1243 | } | |
83f64091 | 1244 | #endif |
50779cc2 | 1245 | } else { |
83f64091 FB |
1246 | size = lseek(fd, 0, SEEK_END); |
1247 | } | |
83f64091 FB |
1248 | return size; |
1249 | } | |
50779cc2 CH |
1250 | #else |
1251 | static int64_t raw_getlength(BlockDriverState *bs) | |
1252 | { | |
1253 | BDRVRawState *s = bs->opaque; | |
1254 | int ret; | |
1255 | ||
1256 | ret = fd_open(bs); | |
1257 | if (ret < 0) { | |
1258 | return ret; | |
1259 | } | |
1260 | ||
1261 | return lseek(s->fd, 0, SEEK_END); | |
1262 | } | |
128ab2ff | 1263 | #endif |
83f64091 | 1264 | |
4a1d5e1f FZ |
1265 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
1266 | { | |
1267 | struct stat st; | |
1268 | BDRVRawState *s = bs->opaque; | |
1269 | ||
1270 | if (fstat(s->fd, &st) < 0) { | |
1271 | return -errno; | |
1272 | } | |
1273 | return (int64_t)st.st_blocks * 512; | |
1274 | } | |
1275 | ||
6f482f74 | 1276 | static int raw_create(const char *filename, QemuOpts *opts, Error **errp) |
83f64091 FB |
1277 | { |
1278 | int fd; | |
1e37d059 | 1279 | int result = 0; |
0e7e1989 | 1280 | int64_t total_size = 0; |
83f64091 | 1281 | |
464d9f64 HR |
1282 | strstart(filename, "file:", &filename); |
1283 | ||
0e7e1989 | 1284 | /* Read out options */ |
6f482f74 CL |
1285 | total_size = |
1286 | qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE; | |
83f64091 | 1287 | |
6165f4d8 CB |
1288 | fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
1289 | 0644); | |
1e37d059 SW |
1290 | if (fd < 0) { |
1291 | result = -errno; | |
e428e439 | 1292 | error_setg_errno(errp, -result, "Could not create file"); |
1e37d059 | 1293 | } else { |
9040385d | 1294 | if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
1e37d059 | 1295 | result = -errno; |
e428e439 | 1296 | error_setg_errno(errp, -result, "Could not resize file"); |
1e37d059 | 1297 | } |
2e1e79da | 1298 | if (qemu_close(fd) != 0) { |
1e37d059 | 1299 | result = -errno; |
e428e439 | 1300 | error_setg_errno(errp, -result, "Could not close the new file"); |
1e37d059 SW |
1301 | } |
1302 | } | |
1303 | return result; | |
83f64091 FB |
1304 | } |
1305 | ||
4f11aa8a HR |
1306 | static int64_t try_fiemap(BlockDriverState *bs, off_t start, off_t *data, |
1307 | off_t *hole, int nb_sectors, int *pnum) | |
5500316d | 1308 | { |
5500316d | 1309 | #ifdef CONFIG_FIEMAP |
94282e71 | 1310 | BDRVRawState *s = bs->opaque; |
4f11aa8a | 1311 | int64_t ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; |
5500316d PB |
1312 | struct { |
1313 | struct fiemap fm; | |
1314 | struct fiemap_extent fe; | |
1315 | } f; | |
94282e71 | 1316 | |
4f11aa8a HR |
1317 | if (s->skip_fiemap) { |
1318 | return -ENOTSUP; | |
1319 | } | |
1320 | ||
5500316d PB |
1321 | f.fm.fm_start = start; |
1322 | f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE; | |
1323 | f.fm.fm_flags = 0; | |
1324 | f.fm.fm_extent_count = 1; | |
1325 | f.fm.fm_reserved = 0; | |
1326 | if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) { | |
4f11aa8a HR |
1327 | s->skip_fiemap = true; |
1328 | return -errno; | |
5500316d PB |
1329 | } |
1330 | ||
1331 | if (f.fm.fm_mapped_extents == 0) { | |
1332 | /* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length. | |
1333 | * f.fm.fm_start + f.fm.fm_length must be clamped to the file size! | |
1334 | */ | |
1335 | off_t length = lseek(s->fd, 0, SEEK_END); | |
4f11aa8a HR |
1336 | *hole = f.fm.fm_start; |
1337 | *data = MIN(f.fm.fm_start + f.fm.fm_length, length); | |
5500316d | 1338 | } else { |
4f11aa8a HR |
1339 | *data = f.fe.fe_logical; |
1340 | *hole = f.fe.fe_logical + f.fe.fe_length; | |
f5f7abcf PB |
1341 | if (f.fe.fe_flags & FIEMAP_EXTENT_UNWRITTEN) { |
1342 | ret |= BDRV_BLOCK_ZERO; | |
1343 | } | |
5500316d | 1344 | } |
94282e71 | 1345 | |
4f11aa8a HR |
1346 | return ret; |
1347 | #else | |
1348 | return -ENOTSUP; | |
1349 | #endif | |
1350 | } | |
94282e71 | 1351 | |
4f11aa8a HR |
1352 | static int64_t try_seek_hole(BlockDriverState *bs, off_t start, off_t *data, |
1353 | off_t *hole, int *pnum) | |
1354 | { | |
1355 | #if defined SEEK_HOLE && defined SEEK_DATA | |
94282e71 KW |
1356 | BDRVRawState *s = bs->opaque; |
1357 | ||
4f11aa8a HR |
1358 | *hole = lseek(s->fd, start, SEEK_HOLE); |
1359 | if (*hole == -1) { | |
5500316d PB |
1360 | /* -ENXIO indicates that sector_num was past the end of the file. |
1361 | * There is a virtual hole there. */ | |
1362 | assert(errno != -ENXIO); | |
1363 | ||
4f11aa8a | 1364 | return -errno; |
5500316d PB |
1365 | } |
1366 | ||
4f11aa8a HR |
1367 | if (*hole > start) { |
1368 | *data = start; | |
5500316d PB |
1369 | } else { |
1370 | /* On a hole. We need another syscall to find its end. */ | |
4f11aa8a HR |
1371 | *data = lseek(s->fd, start, SEEK_DATA); |
1372 | if (*data == -1) { | |
1373 | *data = lseek(s->fd, 0, SEEK_END); | |
5500316d PB |
1374 | } |
1375 | } | |
4f11aa8a HR |
1376 | |
1377 | return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; | |
5500316d | 1378 | #else |
4f11aa8a | 1379 | return -ENOTSUP; |
5500316d | 1380 | #endif |
4f11aa8a HR |
1381 | } |
1382 | ||
1383 | /* | |
1384 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1385 | * not implementing the functionality are assumed to not support backing files, | |
1386 | * hence all their sectors are reported as allocated. | |
1387 | * | |
1388 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
1389 | * and 'pnum' is set to 0. | |
1390 | * | |
1391 | * 'pnum' is set to the number of sectors (including and immediately following | |
1392 | * the specified sector) that are known to be in the same | |
1393 | * allocated/unallocated state. | |
1394 | * | |
1395 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
1396 | * beyond the end of the disk image it will be clamped. | |
1397 | */ | |
1398 | static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, | |
1399 | int64_t sector_num, | |
1400 | int nb_sectors, int *pnum) | |
1401 | { | |
1402 | off_t start, data = 0, hole = 0; | |
1403 | int64_t ret; | |
1404 | ||
1405 | ret = fd_open(bs); | |
1406 | if (ret < 0) { | |
1407 | return ret; | |
1408 | } | |
1409 | ||
1410 | start = sector_num * BDRV_SECTOR_SIZE; | |
1411 | ||
1412 | ret = try_fiemap(bs, start, &data, &hole, nb_sectors, pnum); | |
1413 | if (ret < 0) { | |
1414 | ret = try_seek_hole(bs, start, &data, &hole, pnum); | |
1415 | if (ret < 0) { | |
1416 | /* Assume everything is allocated. */ | |
1417 | data = 0; | |
1418 | hole = start + nb_sectors * BDRV_SECTOR_SIZE; | |
1419 | ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; | |
1420 | } | |
1421 | } | |
5500316d PB |
1422 | |
1423 | if (data <= start) { | |
1424 | /* On a data extent, compute sectors to the end of the extent. */ | |
1425 | *pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); | |
5500316d PB |
1426 | } else { |
1427 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
1428 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); | |
63390a8d PB |
1429 | ret &= ~BDRV_BLOCK_DATA; |
1430 | ret |= BDRV_BLOCK_ZERO; | |
5500316d | 1431 | } |
63390a8d PB |
1432 | |
1433 | return ret; | |
5500316d PB |
1434 | } |
1435 | ||
8238010b PB |
1436 | static coroutine_fn BlockDriverAIOCB *raw_aio_discard(BlockDriverState *bs, |
1437 | int64_t sector_num, int nb_sectors, | |
1438 | BlockDriverCompletionFunc *cb, void *opaque) | |
dce512de | 1439 | { |
dce512de CH |
1440 | BDRVRawState *s = bs->opaque; |
1441 | ||
8238010b PB |
1442 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, |
1443 | cb, opaque, QEMU_AIO_DISCARD); | |
dce512de | 1444 | } |
0e7e1989 | 1445 | |
260a82e5 PB |
1446 | static int coroutine_fn raw_co_write_zeroes( |
1447 | BlockDriverState *bs, int64_t sector_num, | |
1448 | int nb_sectors, BdrvRequestFlags flags) | |
1449 | { | |
1450 | BDRVRawState *s = bs->opaque; | |
1451 | ||
1452 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1453 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1454 | QEMU_AIO_WRITE_ZEROES); | |
1455 | } else if (s->discard_zeroes) { | |
1456 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1457 | QEMU_AIO_DISCARD); | |
260a82e5 | 1458 | } |
97a2ae34 | 1459 | return -ENOTSUP; |
260a82e5 PB |
1460 | } |
1461 | ||
1462 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
1463 | { | |
1464 | BDRVRawState *s = bs->opaque; | |
1465 | ||
1466 | bdi->unallocated_blocks_are_zero = s->discard_zeroes; | |
1467 | bdi->can_write_zeroes_with_unmap = s->discard_zeroes; | |
1468 | return 0; | |
1469 | } | |
1470 | ||
6f482f74 CL |
1471 | static QemuOptsList raw_create_opts = { |
1472 | .name = "raw-create-opts", | |
1473 | .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), | |
1474 | .desc = { | |
1475 | { | |
1476 | .name = BLOCK_OPT_SIZE, | |
1477 | .type = QEMU_OPT_SIZE, | |
1478 | .help = "Virtual disk size" | |
1479 | }, | |
1480 | { /* end of list */ } | |
1481 | } | |
0e7e1989 KW |
1482 | }; |
1483 | ||
84a12e66 CH |
1484 | static BlockDriver bdrv_file = { |
1485 | .format_name = "file", | |
1486 | .protocol_name = "file", | |
856ae5c3 | 1487 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1488 | .bdrv_needs_filename = true, |
856ae5c3 | 1489 | .bdrv_probe = NULL, /* no probe for protocols */ |
078896a9 | 1490 | .bdrv_parse_filename = raw_parse_filename, |
66f82cee | 1491 | .bdrv_file_open = raw_open, |
eeb6b45d JC |
1492 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1493 | .bdrv_reopen_commit = raw_reopen_commit, | |
1494 | .bdrv_reopen_abort = raw_reopen_abort, | |
856ae5c3 | 1495 | .bdrv_close = raw_close, |
c282e1fd | 1496 | .bdrv_create = raw_create, |
3ac21627 | 1497 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
b6b8a333 | 1498 | .bdrv_co_get_block_status = raw_co_get_block_status, |
260a82e5 | 1499 | .bdrv_co_write_zeroes = raw_co_write_zeroes, |
3b46e624 | 1500 | |
f141eafe AL |
1501 | .bdrv_aio_readv = raw_aio_readv, |
1502 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1503 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 1504 | .bdrv_aio_discard = raw_aio_discard, |
c25f53b0 | 1505 | .bdrv_refresh_limits = raw_refresh_limits, |
3c529d93 | 1506 | |
83f64091 FB |
1507 | .bdrv_truncate = raw_truncate, |
1508 | .bdrv_getlength = raw_getlength, | |
260a82e5 | 1509 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1510 | .bdrv_get_allocated_file_size |
1511 | = raw_get_allocated_file_size, | |
0e7e1989 | 1512 | |
c2f3426c SH |
1513 | .bdrv_detach_aio_context = raw_detach_aio_context, |
1514 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
1515 | ||
6f482f74 | 1516 | .create_opts = &raw_create_opts, |
83f64091 FB |
1517 | }; |
1518 | ||
19cb3738 FB |
1519 | /***********************************************/ |
1520 | /* host device */ | |
1521 | ||
83affaa6 | 1522 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1523 | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); |
1524 | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); | |
1525 | ||
1526 | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) | |
1527 | { | |
5fafdf24 | 1528 | kern_return_t kernResult; |
19cb3738 FB |
1529 | mach_port_t masterPort; |
1530 | CFMutableDictionaryRef classesToMatch; | |
1531 | ||
1532 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
1533 | if ( KERN_SUCCESS != kernResult ) { | |
1534 | printf( "IOMasterPort returned %d\n", kernResult ); | |
1535 | } | |
3b46e624 | 1536 | |
5fafdf24 | 1537 | classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
19cb3738 FB |
1538 | if ( classesToMatch == NULL ) { |
1539 | printf( "IOServiceMatching returned a NULL dictionary.\n" ); | |
1540 | } else { | |
1541 | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); | |
1542 | } | |
1543 | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); | |
1544 | if ( KERN_SUCCESS != kernResult ) | |
1545 | { | |
1546 | printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); | |
1547 | } | |
3b46e624 | 1548 | |
19cb3738 FB |
1549 | return kernResult; |
1550 | } | |
1551 | ||
1552 | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) | |
1553 | { | |
1554 | io_object_t nextMedia; | |
1555 | kern_return_t kernResult = KERN_FAILURE; | |
1556 | *bsdPath = '\0'; | |
1557 | nextMedia = IOIteratorNext( mediaIterator ); | |
1558 | if ( nextMedia ) | |
1559 | { | |
1560 | CFTypeRef bsdPathAsCFString; | |
1561 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
1562 | if ( bsdPathAsCFString ) { | |
1563 | size_t devPathLength; | |
1564 | strcpy( bsdPath, _PATH_DEV ); | |
1565 | strcat( bsdPath, "r" ); | |
1566 | devPathLength = strlen( bsdPath ); | |
1567 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
1568 | kernResult = KERN_SUCCESS; | |
1569 | } | |
1570 | CFRelease( bsdPathAsCFString ); | |
1571 | } | |
1572 | IOObjectRelease( nextMedia ); | |
1573 | } | |
3b46e624 | 1574 | |
19cb3738 FB |
1575 | return kernResult; |
1576 | } | |
1577 | ||
1578 | #endif | |
1579 | ||
508c7cb3 CH |
1580 | static int hdev_probe_device(const char *filename) |
1581 | { | |
1582 | struct stat st; | |
1583 | ||
1584 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
1585 | if (strstart(filename, "/dev/cdrom", NULL)) | |
1586 | return 50; | |
1587 | ||
1588 | if (stat(filename, &st) >= 0 && | |
1589 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
1590 | return 100; | |
1591 | } | |
1592 | ||
1593 | return 0; | |
1594 | } | |
1595 | ||
da888d37 SH |
1596 | static int check_hdev_writable(BDRVRawState *s) |
1597 | { | |
1598 | #if defined(BLKROGET) | |
1599 | /* Linux block devices can be configured "read-only" using blockdev(8). | |
1600 | * This is independent of device node permissions and therefore open(2) | |
1601 | * with O_RDWR succeeds. Actual writes fail with EPERM. | |
1602 | * | |
1603 | * bdrv_open() is supposed to fail if the disk is read-only. Explicitly | |
1604 | * check for read-only block devices so that Linux block devices behave | |
1605 | * properly. | |
1606 | */ | |
1607 | struct stat st; | |
1608 | int readonly = 0; | |
1609 | ||
1610 | if (fstat(s->fd, &st)) { | |
1611 | return -errno; | |
1612 | } | |
1613 | ||
1614 | if (!S_ISBLK(st.st_mode)) { | |
1615 | return 0; | |
1616 | } | |
1617 | ||
1618 | if (ioctl(s->fd, BLKROGET, &readonly) < 0) { | |
1619 | return -errno; | |
1620 | } | |
1621 | ||
1622 | if (readonly) { | |
1623 | return -EACCES; | |
1624 | } | |
1625 | #endif /* defined(BLKROGET) */ | |
1626 | return 0; | |
1627 | } | |
1628 | ||
7af803d4 HR |
1629 | static void hdev_parse_filename(const char *filename, QDict *options, |
1630 | Error **errp) | |
1631 | { | |
1632 | /* The prefix is optional, just as for "file". */ | |
1633 | strstart(filename, "host_device:", &filename); | |
1634 | ||
1635 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
1636 | } | |
1637 | ||
015a1036 HR |
1638 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
1639 | Error **errp) | |
19cb3738 FB |
1640 | { |
1641 | BDRVRawState *s = bs->opaque; | |
e428e439 | 1642 | Error *local_err = NULL; |
da888d37 | 1643 | int ret; |
c66a6157 | 1644 | const char *filename = qdict_get_str(options, "filename"); |
a76bab49 | 1645 | |
83affaa6 | 1646 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1647 | if (strstart(filename, "/dev/cdrom", NULL)) { |
1648 | kern_return_t kernResult; | |
1649 | io_iterator_t mediaIterator; | |
1650 | char bsdPath[ MAXPATHLEN ]; | |
1651 | int fd; | |
5fafdf24 | 1652 | |
19cb3738 FB |
1653 | kernResult = FindEjectableCDMedia( &mediaIterator ); |
1654 | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); | |
3b46e624 | 1655 | |
19cb3738 FB |
1656 | if ( bsdPath[ 0 ] != '\0' ) { |
1657 | strcat(bsdPath,"s0"); | |
1658 | /* some CDs don't have a partition 0 */ | |
6165f4d8 | 1659 | fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
19cb3738 FB |
1660 | if (fd < 0) { |
1661 | bsdPath[strlen(bsdPath)-1] = '1'; | |
1662 | } else { | |
2e1e79da | 1663 | qemu_close(fd); |
19cb3738 FB |
1664 | } |
1665 | filename = bsdPath; | |
a5c5ea3f | 1666 | qdict_put(options, "filename", qstring_from_str(filename)); |
19cb3738 | 1667 | } |
3b46e624 | 1668 | |
19cb3738 FB |
1669 | if ( mediaIterator ) |
1670 | IOObjectRelease( mediaIterator ); | |
1671 | } | |
1672 | #endif | |
19cb3738 FB |
1673 | |
1674 | s->type = FTYPE_FILE; | |
4dd75c70 | 1675 | #if defined(__linux__) |
05acda4d BK |
1676 | { |
1677 | char resolved_path[ MAXPATHLEN ], *temp; | |
1678 | ||
1679 | temp = realpath(filename, resolved_path); | |
1680 | if (temp && strstart(temp, "/dev/sg", NULL)) { | |
1681 | bs->sg = 1; | |
1682 | } | |
19cb3738 FB |
1683 | } |
1684 | #endif | |
90babde0 | 1685 | |
e428e439 | 1686 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
da888d37 | 1687 | if (ret < 0) { |
84d18f06 | 1688 | if (local_err) { |
e428e439 HR |
1689 | error_propagate(errp, local_err); |
1690 | } | |
da888d37 SH |
1691 | return ret; |
1692 | } | |
1693 | ||
1694 | if (flags & BDRV_O_RDWR) { | |
1695 | ret = check_hdev_writable(s); | |
1696 | if (ret < 0) { | |
1697 | raw_close(bs); | |
e428e439 | 1698 | error_setg_errno(errp, -ret, "The device is not writable"); |
da888d37 SH |
1699 | return ret; |
1700 | } | |
1701 | } | |
1702 | ||
1703 | return ret; | |
19cb3738 FB |
1704 | } |
1705 | ||
03ff3ca3 | 1706 | #if defined(__linux__) |
19cb3738 FB |
1707 | /* Note: we do not have a reliable method to detect if the floppy is |
1708 | present. The current method is to try to open the floppy at every | |
1709 | I/O and to keep it opened during a few hundreds of ms. */ | |
1710 | static int fd_open(BlockDriverState *bs) | |
1711 | { | |
1712 | BDRVRawState *s = bs->opaque; | |
1713 | int last_media_present; | |
1714 | ||
1715 | if (s->type != FTYPE_FD) | |
1716 | return 0; | |
1717 | last_media_present = (s->fd >= 0); | |
5fafdf24 | 1718 | if (s->fd >= 0 && |
c57c846a | 1719 | (get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
2e1e79da | 1720 | qemu_close(s->fd); |
19cb3738 FB |
1721 | s->fd = -1; |
1722 | #ifdef DEBUG_FLOPPY | |
1723 | printf("Floppy closed\n"); | |
1724 | #endif | |
1725 | } | |
1726 | if (s->fd < 0) { | |
5fafdf24 | 1727 | if (s->fd_got_error && |
c57c846a | 1728 | (get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
19cb3738 FB |
1729 | #ifdef DEBUG_FLOPPY |
1730 | printf("No floppy (open delayed)\n"); | |
1731 | #endif | |
1732 | return -EIO; | |
1733 | } | |
6165f4d8 | 1734 | s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK); |
19cb3738 | 1735 | if (s->fd < 0) { |
c57c846a | 1736 | s->fd_error_time = get_clock(); |
19cb3738 FB |
1737 | s->fd_got_error = 1; |
1738 | if (last_media_present) | |
1739 | s->fd_media_changed = 1; | |
1740 | #ifdef DEBUG_FLOPPY | |
1741 | printf("No floppy\n"); | |
1742 | #endif | |
1743 | return -EIO; | |
1744 | } | |
1745 | #ifdef DEBUG_FLOPPY | |
1746 | printf("Floppy opened\n"); | |
1747 | #endif | |
1748 | } | |
1749 | if (!last_media_present) | |
1750 | s->fd_media_changed = 1; | |
c57c846a | 1751 | s->fd_open_time = get_clock(); |
19cb3738 FB |
1752 | s->fd_got_error = 0; |
1753 | return 0; | |
1754 | } | |
19cb3738 | 1755 | |
63ec93db | 1756 | static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
985a03b0 TS |
1757 | { |
1758 | BDRVRawState *s = bs->opaque; | |
1759 | ||
1760 | return ioctl(s->fd, req, buf); | |
1761 | } | |
221f715d | 1762 | |
63ec93db | 1763 | static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
221f715d AL |
1764 | unsigned long int req, void *buf, |
1765 | BlockDriverCompletionFunc *cb, void *opaque) | |
1766 | { | |
f141eafe | 1767 | BDRVRawState *s = bs->opaque; |
c208e8c2 | 1768 | RawPosixAIOData *acb; |
c4d9d196 | 1769 | ThreadPool *pool; |
221f715d | 1770 | |
f141eafe AL |
1771 | if (fd_open(bs) < 0) |
1772 | return NULL; | |
c208e8c2 PB |
1773 | |
1774 | acb = g_slice_new(RawPosixAIOData); | |
1775 | acb->bs = bs; | |
1776 | acb->aio_type = QEMU_AIO_IOCTL; | |
1777 | acb->aio_fildes = s->fd; | |
1778 | acb->aio_offset = 0; | |
1779 | acb->aio_ioctl_buf = buf; | |
1780 | acb->aio_ioctl_cmd = req; | |
c4d9d196 SH |
1781 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1782 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
221f715d AL |
1783 | } |
1784 | ||
a167ba50 | 1785 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1786 | static int fd_open(BlockDriverState *bs) |
1787 | { | |
1788 | BDRVRawState *s = bs->opaque; | |
1789 | ||
1790 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
1791 | if (s->fd >= 0) | |
1792 | return 0; | |
1793 | return -EIO; | |
1794 | } | |
9f23011a | 1795 | #else /* !linux && !FreeBSD */ |
19cb3738 | 1796 | |
08af02e2 AL |
1797 | static int fd_open(BlockDriverState *bs) |
1798 | { | |
1799 | return 0; | |
1800 | } | |
1801 | ||
221f715d | 1802 | #endif /* !linux && !FreeBSD */ |
04eeb8b6 | 1803 | |
c36dd8a0 AF |
1804 | static coroutine_fn BlockDriverAIOCB *hdev_aio_discard(BlockDriverState *bs, |
1805 | int64_t sector_num, int nb_sectors, | |
1806 | BlockDriverCompletionFunc *cb, void *opaque) | |
1807 | { | |
1808 | BDRVRawState *s = bs->opaque; | |
1809 | ||
1810 | if (fd_open(bs) < 0) { | |
1811 | return NULL; | |
1812 | } | |
1813 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, | |
1814 | cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
1815 | } | |
1816 | ||
d0b4503e PB |
1817 | static coroutine_fn int hdev_co_write_zeroes(BlockDriverState *bs, |
1818 | int64_t sector_num, int nb_sectors, BdrvRequestFlags flags) | |
1819 | { | |
1820 | BDRVRawState *s = bs->opaque; | |
1821 | int rc; | |
1822 | ||
1823 | rc = fd_open(bs); | |
1824 | if (rc < 0) { | |
1825 | return rc; | |
1826 | } | |
1827 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1828 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1829 | QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV); | |
1830 | } else if (s->discard_zeroes) { | |
1831 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1832 | QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
d0b4503e | 1833 | } |
97a2ae34 | 1834 | return -ENOTSUP; |
d0b4503e PB |
1835 | } |
1836 | ||
6f482f74 | 1837 | static int hdev_create(const char *filename, QemuOpts *opts, |
d5124c00 | 1838 | Error **errp) |
93c65b47 AL |
1839 | { |
1840 | int fd; | |
1841 | int ret = 0; | |
1842 | struct stat stat_buf; | |
0e7e1989 | 1843 | int64_t total_size = 0; |
cc28c6aa HR |
1844 | bool has_prefix; |
1845 | ||
1846 | /* This function is used by all three protocol block drivers and therefore | |
1847 | * any of these three prefixes may be given. | |
1848 | * The return value has to be stored somewhere, otherwise this is an error | |
1849 | * due to -Werror=unused-value. */ | |
1850 | has_prefix = | |
1851 | strstart(filename, "host_device:", &filename) || | |
1852 | strstart(filename, "host_cdrom:" , &filename) || | |
1853 | strstart(filename, "host_floppy:", &filename); | |
1854 | ||
1855 | (void)has_prefix; | |
93c65b47 | 1856 | |
0e7e1989 | 1857 | /* Read out options */ |
6f482f74 CL |
1858 | total_size = |
1859 | qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE; | |
93c65b47 | 1860 | |
6165f4d8 | 1861 | fd = qemu_open(filename, O_WRONLY | O_BINARY); |
e428e439 HR |
1862 | if (fd < 0) { |
1863 | ret = -errno; | |
1864 | error_setg_errno(errp, -ret, "Could not open device"); | |
1865 | return ret; | |
1866 | } | |
93c65b47 | 1867 | |
e428e439 | 1868 | if (fstat(fd, &stat_buf) < 0) { |
57e69b7d | 1869 | ret = -errno; |
e428e439 HR |
1870 | error_setg_errno(errp, -ret, "Could not stat device"); |
1871 | } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) { | |
1872 | error_setg(errp, | |
1873 | "The given file is neither a block nor a character device"); | |
57e69b7d | 1874 | ret = -ENODEV; |
e428e439 HR |
1875 | } else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) { |
1876 | error_setg(errp, "Device is too small"); | |
93c65b47 | 1877 | ret = -ENOSPC; |
e428e439 | 1878 | } |
93c65b47 | 1879 | |
2e1e79da | 1880 | qemu_close(fd); |
93c65b47 AL |
1881 | return ret; |
1882 | } | |
1883 | ||
5efa9d5a | 1884 | static BlockDriver bdrv_host_device = { |
0b4ce02e | 1885 | .format_name = "host_device", |
84a12e66 | 1886 | .protocol_name = "host_device", |
0b4ce02e | 1887 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1888 | .bdrv_needs_filename = true, |
0b4ce02e | 1889 | .bdrv_probe_device = hdev_probe_device, |
7af803d4 | 1890 | .bdrv_parse_filename = hdev_parse_filename, |
66f82cee | 1891 | .bdrv_file_open = hdev_open, |
0b4ce02e | 1892 | .bdrv_close = raw_close, |
1bc6b705 JC |
1893 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1894 | .bdrv_reopen_commit = raw_reopen_commit, | |
1895 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 1896 | .bdrv_create = hdev_create, |
6f482f74 | 1897 | .create_opts = &raw_create_opts, |
d0b4503e | 1898 | .bdrv_co_write_zeroes = hdev_co_write_zeroes, |
3b46e624 | 1899 | |
f141eafe AL |
1900 | .bdrv_aio_readv = raw_aio_readv, |
1901 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1902 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 1903 | .bdrv_aio_discard = hdev_aio_discard, |
c25f53b0 | 1904 | .bdrv_refresh_limits = raw_refresh_limits, |
3c529d93 | 1905 | |
55b949c8 | 1906 | .bdrv_truncate = raw_truncate, |
e60f469c | 1907 | .bdrv_getlength = raw_getlength, |
260a82e5 | 1908 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1909 | .bdrv_get_allocated_file_size |
1910 | = raw_get_allocated_file_size, | |
19cb3738 | 1911 | |
c2f3426c SH |
1912 | .bdrv_detach_aio_context = raw_detach_aio_context, |
1913 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
1914 | ||
f3a5d3f8 | 1915 | /* generic scsi device */ |
63ec93db CH |
1916 | #ifdef __linux__ |
1917 | .bdrv_ioctl = hdev_ioctl, | |
63ec93db CH |
1918 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
1919 | #endif | |
f3a5d3f8 CH |
1920 | }; |
1921 | ||
1922 | #ifdef __linux__ | |
d3f49845 HR |
1923 | static void floppy_parse_filename(const char *filename, QDict *options, |
1924 | Error **errp) | |
1925 | { | |
1926 | /* The prefix is optional, just as for "file". */ | |
1927 | strstart(filename, "host_floppy:", &filename); | |
1928 | ||
1929 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
1930 | } | |
1931 | ||
015a1036 HR |
1932 | static int floppy_open(BlockDriverState *bs, QDict *options, int flags, |
1933 | Error **errp) | |
f3a5d3f8 CH |
1934 | { |
1935 | BDRVRawState *s = bs->opaque; | |
e428e439 | 1936 | Error *local_err = NULL; |
f3a5d3f8 CH |
1937 | int ret; |
1938 | ||
f3a5d3f8 | 1939 | s->type = FTYPE_FD; |
f3a5d3f8 | 1940 | |
19a3da7f | 1941 | /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ |
e428e439 HR |
1942 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
1943 | if (ret) { | |
84d18f06 | 1944 | if (local_err) { |
e428e439 HR |
1945 | error_propagate(errp, local_err); |
1946 | } | |
f3a5d3f8 | 1947 | return ret; |
e428e439 | 1948 | } |
f3a5d3f8 CH |
1949 | |
1950 | /* close fd so that we can reopen it as needed */ | |
2e1e79da | 1951 | qemu_close(s->fd); |
f3a5d3f8 CH |
1952 | s->fd = -1; |
1953 | s->fd_media_changed = 1; | |
1954 | ||
1955 | return 0; | |
1956 | } | |
1957 | ||
508c7cb3 CH |
1958 | static int floppy_probe_device(const char *filename) |
1959 | { | |
2ebf7c4b CR |
1960 | int fd, ret; |
1961 | int prio = 0; | |
1962 | struct floppy_struct fdparam; | |
343f8568 | 1963 | struct stat st; |
2ebf7c4b | 1964 | |
e1740828 CB |
1965 | if (strstart(filename, "/dev/fd", NULL) && |
1966 | !strstart(filename, "/dev/fdset/", NULL)) { | |
2ebf7c4b | 1967 | prio = 50; |
e1740828 | 1968 | } |
2ebf7c4b | 1969 | |
6165f4d8 | 1970 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
2ebf7c4b CR |
1971 | if (fd < 0) { |
1972 | goto out; | |
1973 | } | |
343f8568 JS |
1974 | ret = fstat(fd, &st); |
1975 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
1976 | goto outc; | |
1977 | } | |
2ebf7c4b CR |
1978 | |
1979 | /* Attempt to detect via a floppy specific ioctl */ | |
1980 | ret = ioctl(fd, FDGETPRM, &fdparam); | |
1981 | if (ret >= 0) | |
1982 | prio = 100; | |
1983 | ||
343f8568 | 1984 | outc: |
2e1e79da | 1985 | qemu_close(fd); |
2ebf7c4b CR |
1986 | out: |
1987 | return prio; | |
508c7cb3 CH |
1988 | } |
1989 | ||
1990 | ||
f3a5d3f8 CH |
1991 | static int floppy_is_inserted(BlockDriverState *bs) |
1992 | { | |
1993 | return fd_open(bs) >= 0; | |
1994 | } | |
1995 | ||
1996 | static int floppy_media_changed(BlockDriverState *bs) | |
1997 | { | |
1998 | BDRVRawState *s = bs->opaque; | |
1999 | int ret; | |
2000 | ||
2001 | /* | |
2002 | * XXX: we do not have a true media changed indication. | |
2003 | * It does not work if the floppy is changed without trying to read it. | |
2004 | */ | |
2005 | fd_open(bs); | |
2006 | ret = s->fd_media_changed; | |
2007 | s->fd_media_changed = 0; | |
2008 | #ifdef DEBUG_FLOPPY | |
2009 | printf("Floppy changed=%d\n", ret); | |
2010 | #endif | |
2011 | return ret; | |
2012 | } | |
2013 | ||
f36f3949 | 2014 | static void floppy_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2015 | { |
2016 | BDRVRawState *s = bs->opaque; | |
2017 | int fd; | |
2018 | ||
2019 | if (s->fd >= 0) { | |
2e1e79da | 2020 | qemu_close(s->fd); |
f3a5d3f8 CH |
2021 | s->fd = -1; |
2022 | } | |
6165f4d8 | 2023 | fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK); |
f3a5d3f8 CH |
2024 | if (fd >= 0) { |
2025 | if (ioctl(fd, FDEJECT, 0) < 0) | |
2026 | perror("FDEJECT"); | |
2e1e79da | 2027 | qemu_close(fd); |
f3a5d3f8 | 2028 | } |
f3a5d3f8 CH |
2029 | } |
2030 | ||
2031 | static BlockDriver bdrv_host_floppy = { | |
2032 | .format_name = "host_floppy", | |
84a12e66 | 2033 | .protocol_name = "host_floppy", |
f3a5d3f8 | 2034 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2035 | .bdrv_needs_filename = true, |
508c7cb3 | 2036 | .bdrv_probe_device = floppy_probe_device, |
d3f49845 | 2037 | .bdrv_parse_filename = floppy_parse_filename, |
66f82cee | 2038 | .bdrv_file_open = floppy_open, |
f3a5d3f8 | 2039 | .bdrv_close = raw_close, |
1bc6b705 JC |
2040 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2041 | .bdrv_reopen_commit = raw_reopen_commit, | |
2042 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2043 | .bdrv_create = hdev_create, |
6f482f74 | 2044 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2045 | |
f3a5d3f8 CH |
2046 | .bdrv_aio_readv = raw_aio_readv, |
2047 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2048 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2049 | .bdrv_refresh_limits = raw_refresh_limits, |
f3a5d3f8 | 2050 | |
55b949c8 | 2051 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2052 | .bdrv_getlength = raw_getlength, |
2053 | .has_variable_length = true, | |
4a1d5e1f FZ |
2054 | .bdrv_get_allocated_file_size |
2055 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2056 | |
c2f3426c SH |
2057 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2058 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2059 | ||
f3a5d3f8 CH |
2060 | /* removable device support */ |
2061 | .bdrv_is_inserted = floppy_is_inserted, | |
2062 | .bdrv_media_changed = floppy_media_changed, | |
2063 | .bdrv_eject = floppy_eject, | |
f3a5d3f8 | 2064 | }; |
18fa1c42 | 2065 | #endif |
f3a5d3f8 | 2066 | |
18fa1c42 HR |
2067 | #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
2068 | static void cdrom_parse_filename(const char *filename, QDict *options, | |
2069 | Error **errp) | |
2070 | { | |
2071 | /* The prefix is optional, just as for "file". */ | |
2072 | strstart(filename, "host_cdrom:", &filename); | |
2073 | ||
2074 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
2075 | } | |
2076 | #endif | |
2077 | ||
2078 | #ifdef __linux__ | |
015a1036 HR |
2079 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2080 | Error **errp) | |
f3a5d3f8 CH |
2081 | { |
2082 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
2083 | Error *local_err = NULL; |
2084 | int ret; | |
f3a5d3f8 | 2085 | |
f3a5d3f8 CH |
2086 | s->type = FTYPE_CD; |
2087 | ||
19a3da7f | 2088 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
e428e439 | 2089 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
84d18f06 | 2090 | if (local_err) { |
e428e439 HR |
2091 | error_propagate(errp, local_err); |
2092 | } | |
2093 | return ret; | |
f3a5d3f8 CH |
2094 | } |
2095 | ||
508c7cb3 CH |
2096 | static int cdrom_probe_device(const char *filename) |
2097 | { | |
3baf720e CR |
2098 | int fd, ret; |
2099 | int prio = 0; | |
343f8568 | 2100 | struct stat st; |
3baf720e | 2101 | |
6165f4d8 | 2102 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
3baf720e CR |
2103 | if (fd < 0) { |
2104 | goto out; | |
2105 | } | |
343f8568 JS |
2106 | ret = fstat(fd, &st); |
2107 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
2108 | goto outc; | |
2109 | } | |
3baf720e CR |
2110 | |
2111 | /* Attempt to detect via a CDROM specific ioctl */ | |
2112 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2113 | if (ret >= 0) | |
2114 | prio = 100; | |
2115 | ||
343f8568 | 2116 | outc: |
2e1e79da | 2117 | qemu_close(fd); |
3baf720e CR |
2118 | out: |
2119 | return prio; | |
508c7cb3 CH |
2120 | } |
2121 | ||
f3a5d3f8 CH |
2122 | static int cdrom_is_inserted(BlockDriverState *bs) |
2123 | { | |
2124 | BDRVRawState *s = bs->opaque; | |
2125 | int ret; | |
2126 | ||
2127 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2128 | if (ret == CDS_DISC_OK) | |
2129 | return 1; | |
2130 | return 0; | |
2131 | } | |
2132 | ||
f36f3949 | 2133 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2134 | { |
2135 | BDRVRawState *s = bs->opaque; | |
2136 | ||
2137 | if (eject_flag) { | |
2138 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
2139 | perror("CDROMEJECT"); | |
2140 | } else { | |
2141 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
2142 | perror("CDROMEJECT"); | |
2143 | } | |
f3a5d3f8 CH |
2144 | } |
2145 | ||
025e849a | 2146 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2147 | { |
2148 | BDRVRawState *s = bs->opaque; | |
2149 | ||
2150 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
2151 | /* | |
2152 | * Note: an error can happen if the distribution automatically | |
2153 | * mounts the CD-ROM | |
2154 | */ | |
2155 | /* perror("CDROM_LOCKDOOR"); */ | |
2156 | } | |
f3a5d3f8 CH |
2157 | } |
2158 | ||
2159 | static BlockDriver bdrv_host_cdrom = { | |
2160 | .format_name = "host_cdrom", | |
84a12e66 | 2161 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2162 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2163 | .bdrv_needs_filename = true, |
508c7cb3 | 2164 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2165 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2166 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2167 | .bdrv_close = raw_close, |
1bc6b705 JC |
2168 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2169 | .bdrv_reopen_commit = raw_reopen_commit, | |
2170 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2171 | .bdrv_create = hdev_create, |
6f482f74 | 2172 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2173 | |
f3a5d3f8 CH |
2174 | .bdrv_aio_readv = raw_aio_readv, |
2175 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2176 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2177 | .bdrv_refresh_limits = raw_refresh_limits, |
f3a5d3f8 | 2178 | |
55b949c8 | 2179 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2180 | .bdrv_getlength = raw_getlength, |
2181 | .has_variable_length = true, | |
4a1d5e1f FZ |
2182 | .bdrv_get_allocated_file_size |
2183 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2184 | |
c2f3426c SH |
2185 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2186 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2187 | ||
f3a5d3f8 CH |
2188 | /* removable device support */ |
2189 | .bdrv_is_inserted = cdrom_is_inserted, | |
2190 | .bdrv_eject = cdrom_eject, | |
025e849a | 2191 | .bdrv_lock_medium = cdrom_lock_medium, |
f3a5d3f8 CH |
2192 | |
2193 | /* generic scsi device */ | |
63ec93db | 2194 | .bdrv_ioctl = hdev_ioctl, |
63ec93db | 2195 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
f3a5d3f8 CH |
2196 | }; |
2197 | #endif /* __linux__ */ | |
2198 | ||
a167ba50 | 2199 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
511018e4 AT |
2200 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2201 | Error **errp) | |
f3a5d3f8 CH |
2202 | { |
2203 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2204 | Error *local_err = NULL; |
f3a5d3f8 CH |
2205 | int ret; |
2206 | ||
2207 | s->type = FTYPE_CD; | |
2208 | ||
e428e439 HR |
2209 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
2210 | if (ret) { | |
84d18f06 | 2211 | if (local_err) { |
e428e439 HR |
2212 | error_propagate(errp, local_err); |
2213 | } | |
f3a5d3f8 | 2214 | return ret; |
e428e439 | 2215 | } |
f3a5d3f8 | 2216 | |
9b2260cb | 2217 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2218 | ioctl(s->fd, CDIOCALLOW); |
2219 | return 0; | |
2220 | } | |
2221 | ||
508c7cb3 CH |
2222 | static int cdrom_probe_device(const char *filename) |
2223 | { | |
2224 | if (strstart(filename, "/dev/cd", NULL) || | |
2225 | strstart(filename, "/dev/acd", NULL)) | |
2226 | return 100; | |
2227 | return 0; | |
2228 | } | |
2229 | ||
f3a5d3f8 CH |
2230 | static int cdrom_reopen(BlockDriverState *bs) |
2231 | { | |
2232 | BDRVRawState *s = bs->opaque; | |
2233 | int fd; | |
2234 | ||
2235 | /* | |
2236 | * Force reread of possibly changed/newly loaded disc, | |
2237 | * FreeBSD seems to not notice sometimes... | |
2238 | */ | |
2239 | if (s->fd >= 0) | |
2e1e79da | 2240 | qemu_close(s->fd); |
6165f4d8 | 2241 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
f3a5d3f8 CH |
2242 | if (fd < 0) { |
2243 | s->fd = -1; | |
2244 | return -EIO; | |
2245 | } | |
2246 | s->fd = fd; | |
2247 | ||
9b2260cb | 2248 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2249 | ioctl(s->fd, CDIOCALLOW); |
2250 | return 0; | |
2251 | } | |
2252 | ||
2253 | static int cdrom_is_inserted(BlockDriverState *bs) | |
2254 | { | |
2255 | return raw_getlength(bs) > 0; | |
2256 | } | |
2257 | ||
f36f3949 | 2258 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2259 | { |
2260 | BDRVRawState *s = bs->opaque; | |
2261 | ||
2262 | if (s->fd < 0) | |
822e1cd1 | 2263 | return; |
f3a5d3f8 CH |
2264 | |
2265 | (void) ioctl(s->fd, CDIOCALLOW); | |
2266 | ||
2267 | if (eject_flag) { | |
2268 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
2269 | perror("CDIOCEJECT"); | |
2270 | } else { | |
2271 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
2272 | perror("CDIOCCLOSE"); | |
2273 | } | |
2274 | ||
822e1cd1 | 2275 | cdrom_reopen(bs); |
f3a5d3f8 CH |
2276 | } |
2277 | ||
025e849a | 2278 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2279 | { |
2280 | BDRVRawState *s = bs->opaque; | |
2281 | ||
2282 | if (s->fd < 0) | |
7bf37fed | 2283 | return; |
f3a5d3f8 CH |
2284 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
2285 | /* | |
2286 | * Note: an error can happen if the distribution automatically | |
2287 | * mounts the CD-ROM | |
2288 | */ | |
2289 | /* perror("CDROM_LOCKDOOR"); */ | |
2290 | } | |
f3a5d3f8 CH |
2291 | } |
2292 | ||
2293 | static BlockDriver bdrv_host_cdrom = { | |
2294 | .format_name = "host_cdrom", | |
84a12e66 | 2295 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2296 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2297 | .bdrv_needs_filename = true, |
508c7cb3 | 2298 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2299 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2300 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2301 | .bdrv_close = raw_close, |
1bc6b705 JC |
2302 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2303 | .bdrv_reopen_commit = raw_reopen_commit, | |
2304 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2305 | .bdrv_create = hdev_create, |
6f482f74 | 2306 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2307 | |
f3a5d3f8 CH |
2308 | .bdrv_aio_readv = raw_aio_readv, |
2309 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2310 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2311 | .bdrv_refresh_limits = raw_refresh_limits, |
f3a5d3f8 | 2312 | |
55b949c8 | 2313 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2314 | .bdrv_getlength = raw_getlength, |
2315 | .has_variable_length = true, | |
4a1d5e1f FZ |
2316 | .bdrv_get_allocated_file_size |
2317 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2318 | |
c2f3426c SH |
2319 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2320 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2321 | ||
19cb3738 | 2322 | /* removable device support */ |
f3a5d3f8 CH |
2323 | .bdrv_is_inserted = cdrom_is_inserted, |
2324 | .bdrv_eject = cdrom_eject, | |
025e849a | 2325 | .bdrv_lock_medium = cdrom_lock_medium, |
19cb3738 | 2326 | }; |
f3a5d3f8 | 2327 | #endif /* __FreeBSD__ */ |
5efa9d5a | 2328 | |
84a12e66 | 2329 | static void bdrv_file_init(void) |
5efa9d5a | 2330 | { |
508c7cb3 CH |
2331 | /* |
2332 | * Register all the drivers. Note that order is important, the driver | |
2333 | * registered last will get probed first. | |
2334 | */ | |
84a12e66 | 2335 | bdrv_register(&bdrv_file); |
5efa9d5a | 2336 | bdrv_register(&bdrv_host_device); |
f3a5d3f8 CH |
2337 | #ifdef __linux__ |
2338 | bdrv_register(&bdrv_host_floppy); | |
2339 | bdrv_register(&bdrv_host_cdrom); | |
2340 | #endif | |
a167ba50 | 2341 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
2342 | bdrv_register(&bdrv_host_cdrom); |
2343 | #endif | |
5efa9d5a AL |
2344 | } |
2345 | ||
84a12e66 | 2346 | block_init(bdrv_file_init); |