]>
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" |
06247428 | 33 | #include "qapi/util.h" |
83f64091 | 34 | |
83affaa6 | 35 | #if defined(__APPLE__) && (__MACH__) |
83f64091 FB |
36 | #include <paths.h> |
37 | #include <sys/param.h> | |
38 | #include <IOKit/IOKitLib.h> | |
39 | #include <IOKit/IOBSD.h> | |
40 | #include <IOKit/storage/IOMediaBSDClient.h> | |
41 | #include <IOKit/storage/IOMedia.h> | |
42 | #include <IOKit/storage/IOCDMedia.h> | |
43 | //#include <IOKit/storage/IOCDTypes.h> | |
44 | #include <CoreFoundation/CoreFoundation.h> | |
45 | #endif | |
46 | ||
47 | #ifdef __sun__ | |
2e9671da | 48 | #define _POSIX_PTHREAD_SEMANTICS 1 |
83f64091 FB |
49 | #include <sys/dkio.h> |
50 | #endif | |
19cb3738 | 51 | #ifdef __linux__ |
343f8568 JS |
52 | #include <sys/types.h> |
53 | #include <sys/stat.h> | |
19cb3738 | 54 | #include <sys/ioctl.h> |
05acda4d | 55 | #include <sys/param.h> |
19cb3738 FB |
56 | #include <linux/cdrom.h> |
57 | #include <linux/fd.h> | |
5500316d | 58 | #include <linux/fs.h> |
4ab15590 CL |
59 | #ifndef FS_NOCOW_FL |
60 | #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ | |
61 | #endif | |
5500316d | 62 | #endif |
3d4fa43e KK |
63 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
64 | #include <linux/falloc.h> | |
65 | #endif | |
a167ba50 | 66 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
1cb6c3fd | 67 | #include <sys/disk.h> |
9f23011a | 68 | #include <sys/cdio.h> |
1cb6c3fd | 69 | #endif |
83f64091 | 70 | |
128ab2ff BS |
71 | #ifdef __OpenBSD__ |
72 | #include <sys/ioctl.h> | |
73 | #include <sys/disklabel.h> | |
74 | #include <sys/dkio.h> | |
75 | #endif | |
76 | ||
d1f6fd8d CE |
77 | #ifdef __NetBSD__ |
78 | #include <sys/ioctl.h> | |
79 | #include <sys/disklabel.h> | |
80 | #include <sys/dkio.h> | |
81 | #include <sys/disk.h> | |
82 | #endif | |
83 | ||
c5e97233 BS |
84 | #ifdef __DragonFly__ |
85 | #include <sys/ioctl.h> | |
86 | #include <sys/diskslice.h> | |
87 | #endif | |
88 | ||
dce512de CH |
89 | #ifdef CONFIG_XFS |
90 | #include <xfs/xfs.h> | |
91 | #endif | |
92 | ||
19cb3738 | 93 | //#define DEBUG_FLOPPY |
83f64091 | 94 | |
faf07963 | 95 | //#define DEBUG_BLOCK |
03ff3ca3 | 96 | #if defined(DEBUG_BLOCK) |
001faf32 BS |
97 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ |
98 | { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) | |
8c05dbf9 | 99 | #else |
001faf32 | 100 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) |
8c05dbf9 TS |
101 | #endif |
102 | ||
f6465578 AL |
103 | /* OS X does not have O_DSYNC */ |
104 | #ifndef O_DSYNC | |
1c27a8b3 | 105 | #ifdef O_SYNC |
7ab064d2 | 106 | #define O_DSYNC O_SYNC |
1c27a8b3 JA |
107 | #elif defined(O_FSYNC) |
108 | #define O_DSYNC O_FSYNC | |
109 | #endif | |
f6465578 AL |
110 | #endif |
111 | ||
9f7965c7 AL |
112 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
113 | #ifndef O_DIRECT | |
114 | #define O_DIRECT O_DSYNC | |
115 | #endif | |
116 | ||
19cb3738 FB |
117 | #define FTYPE_FILE 0 |
118 | #define FTYPE_CD 1 | |
119 | #define FTYPE_FD 2 | |
83f64091 | 120 | |
c57c846a | 121 | /* if the FD is not accessed during that time (in ns), we try to |
19cb3738 | 122 | reopen it to see if the disk has been changed */ |
c57c846a | 123 | #define FD_OPEN_TIMEOUT (1000000000) |
83f64091 | 124 | |
581b9e29 CH |
125 | #define MAX_BLOCKSIZE 4096 |
126 | ||
19cb3738 FB |
127 | typedef struct BDRVRawState { |
128 | int fd; | |
129 | int type; | |
0e1d8f4c | 130 | int open_flags; |
c25f53b0 PB |
131 | size_t buf_align; |
132 | ||
19cb3738 FB |
133 | #if defined(__linux__) |
134 | /* linux floppy specific */ | |
19cb3738 FB |
135 | int64_t fd_open_time; |
136 | int64_t fd_error_time; | |
137 | int fd_got_error; | |
138 | int fd_media_changed; | |
83f64091 | 139 | #endif |
e44bd6fc | 140 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c | 141 | int use_aio; |
1e5b9d2f | 142 | void *aio_ctx; |
e44bd6fc | 143 | #endif |
dce512de | 144 | #ifdef CONFIG_XFS |
260a82e5 | 145 | bool is_xfs:1; |
dce512de | 146 | #endif |
260a82e5 | 147 | bool has_discard:1; |
97a2ae34 | 148 | bool has_write_zeroes:1; |
260a82e5 | 149 | bool discard_zeroes:1; |
3cad8307 | 150 | bool needs_alignment; |
19cb3738 FB |
151 | } BDRVRawState; |
152 | ||
eeb6b45d JC |
153 | typedef struct BDRVRawReopenState { |
154 | int fd; | |
155 | int open_flags; | |
156 | #ifdef CONFIG_LINUX_AIO | |
157 | int use_aio; | |
158 | #endif | |
159 | } BDRVRawReopenState; | |
160 | ||
19cb3738 | 161 | static int fd_open(BlockDriverState *bs); |
22afa7b5 | 162 | static int64_t raw_getlength(BlockDriverState *bs); |
83f64091 | 163 | |
de81a169 PB |
164 | typedef struct RawPosixAIOData { |
165 | BlockDriverState *bs; | |
166 | int aio_fildes; | |
167 | union { | |
168 | struct iovec *aio_iov; | |
169 | void *aio_ioctl_buf; | |
170 | }; | |
171 | int aio_niov; | |
8238010b | 172 | uint64_t aio_nbytes; |
de81a169 PB |
173 | #define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */ |
174 | off_t aio_offset; | |
175 | int aio_type; | |
176 | } RawPosixAIOData; | |
177 | ||
a167ba50 | 178 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 | 179 | static int cdrom_reopen(BlockDriverState *bs); |
9f23011a BS |
180 | #endif |
181 | ||
1de1ae0a CE |
182 | #if defined(__NetBSD__) |
183 | static int raw_normalize_devicepath(const char **filename) | |
184 | { | |
185 | static char namebuf[PATH_MAX]; | |
186 | const char *dp, *fname; | |
187 | struct stat sb; | |
188 | ||
189 | fname = *filename; | |
190 | dp = strrchr(fname, '/'); | |
191 | if (lstat(fname, &sb) < 0) { | |
192 | fprintf(stderr, "%s: stat failed: %s\n", | |
193 | fname, strerror(errno)); | |
194 | return -errno; | |
195 | } | |
196 | ||
197 | if (!S_ISBLK(sb.st_mode)) { | |
198 | return 0; | |
199 | } | |
200 | ||
201 | if (dp == NULL) { | |
202 | snprintf(namebuf, PATH_MAX, "r%s", fname); | |
203 | } else { | |
204 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", | |
205 | (int)(dp - fname), fname, dp + 1); | |
206 | } | |
207 | fprintf(stderr, "%s is a block device", fname); | |
208 | *filename = namebuf; | |
209 | fprintf(stderr, ", using %s\n", *filename); | |
210 | ||
211 | return 0; | |
212 | } | |
213 | #else | |
214 | static int raw_normalize_devicepath(const char **filename) | |
215 | { | |
216 | return 0; | |
217 | } | |
218 | #endif | |
219 | ||
df26a350 | 220 | static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp) |
c25f53b0 PB |
221 | { |
222 | BDRVRawState *s = bs->opaque; | |
223 | char *buf; | |
224 | unsigned int sector_size; | |
225 | ||
226 | /* For /dev/sg devices the alignment is not really used. | |
227 | With buffered I/O, we don't have any restrictions. */ | |
3cad8307 | 228 | if (bs->sg || !s->needs_alignment) { |
c25f53b0 PB |
229 | bs->request_alignment = 1; |
230 | s->buf_align = 1; | |
231 | return; | |
232 | } | |
233 | ||
234 | /* Try a few ioctls to get the right size */ | |
235 | bs->request_alignment = 0; | |
236 | s->buf_align = 0; | |
237 | ||
238 | #ifdef BLKSSZGET | |
df26a350 | 239 | if (ioctl(fd, BLKSSZGET, §or_size) >= 0) { |
c25f53b0 PB |
240 | bs->request_alignment = sector_size; |
241 | } | |
242 | #endif | |
243 | #ifdef DKIOCGETBLOCKSIZE | |
df26a350 | 244 | if (ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) >= 0) { |
c25f53b0 PB |
245 | bs->request_alignment = sector_size; |
246 | } | |
247 | #endif | |
248 | #ifdef DIOCGSECTORSIZE | |
df26a350 | 249 | if (ioctl(fd, DIOCGSECTORSIZE, §or_size) >= 0) { |
c25f53b0 PB |
250 | bs->request_alignment = sector_size; |
251 | } | |
252 | #endif | |
253 | #ifdef CONFIG_XFS | |
254 | if (s->is_xfs) { | |
255 | struct dioattr da; | |
df26a350 | 256 | if (xfsctl(NULL, fd, XFS_IOC_DIOINFO, &da) >= 0) { |
c25f53b0 PB |
257 | bs->request_alignment = da.d_miniosz; |
258 | /* The kernel returns wrong information for d_mem */ | |
259 | /* s->buf_align = da.d_mem; */ | |
260 | } | |
261 | } | |
262 | #endif | |
263 | ||
264 | /* If we could not get the sizes so far, we can only guess them */ | |
265 | if (!s->buf_align) { | |
266 | size_t align; | |
267 | buf = qemu_memalign(MAX_BLOCKSIZE, 2 * MAX_BLOCKSIZE); | |
268 | for (align = 512; align <= MAX_BLOCKSIZE; align <<= 1) { | |
df26a350 | 269 | if (pread(fd, buf + align, MAX_BLOCKSIZE, 0) >= 0) { |
c25f53b0 PB |
270 | s->buf_align = align; |
271 | break; | |
272 | } | |
273 | } | |
274 | qemu_vfree(buf); | |
275 | } | |
276 | ||
277 | if (!bs->request_alignment) { | |
278 | size_t align; | |
279 | buf = qemu_memalign(s->buf_align, MAX_BLOCKSIZE); | |
280 | for (align = 512; align <= MAX_BLOCKSIZE; align <<= 1) { | |
df26a350 | 281 | if (pread(fd, buf, align, 0) >= 0) { |
c25f53b0 PB |
282 | bs->request_alignment = align; |
283 | break; | |
284 | } | |
285 | } | |
286 | qemu_vfree(buf); | |
287 | } | |
df26a350 KW |
288 | |
289 | if (!s->buf_align || !bs->request_alignment) { | |
290 | error_setg(errp, "Could not find working O_DIRECT alignment. " | |
291 | "Try cache.direct=off."); | |
292 | } | |
c25f53b0 PB |
293 | } |
294 | ||
6a8dc042 JC |
295 | static void raw_parse_flags(int bdrv_flags, int *open_flags) |
296 | { | |
297 | assert(open_flags != NULL); | |
298 | ||
299 | *open_flags |= O_BINARY; | |
300 | *open_flags &= ~O_ACCMODE; | |
301 | if (bdrv_flags & BDRV_O_RDWR) { | |
302 | *open_flags |= O_RDWR; | |
303 | } else { | |
304 | *open_flags |= O_RDONLY; | |
305 | } | |
306 | ||
307 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
308 | * and O_DIRECT for no caching. */ | |
309 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
310 | *open_flags |= O_DIRECT; | |
311 | } | |
6a8dc042 JC |
312 | } |
313 | ||
c2f3426c SH |
314 | static void raw_detach_aio_context(BlockDriverState *bs) |
315 | { | |
316 | #ifdef CONFIG_LINUX_AIO | |
317 | BDRVRawState *s = bs->opaque; | |
318 | ||
319 | if (s->use_aio) { | |
320 | laio_detach_aio_context(s->aio_ctx, bdrv_get_aio_context(bs)); | |
321 | } | |
322 | #endif | |
323 | } | |
324 | ||
325 | static void raw_attach_aio_context(BlockDriverState *bs, | |
326 | AioContext *new_context) | |
327 | { | |
328 | #ifdef CONFIG_LINUX_AIO | |
329 | BDRVRawState *s = bs->opaque; | |
330 | ||
331 | if (s->use_aio) { | |
332 | laio_attach_aio_context(s->aio_ctx, new_context); | |
333 | } | |
334 | #endif | |
335 | } | |
336 | ||
fc32a72d JC |
337 | #ifdef CONFIG_LINUX_AIO |
338 | static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) | |
339 | { | |
340 | int ret = -1; | |
341 | assert(aio_ctx != NULL); | |
342 | assert(use_aio != NULL); | |
343 | /* | |
344 | * Currently Linux do AIO only for files opened with O_DIRECT | |
345 | * specified so check NOCACHE flag too | |
346 | */ | |
347 | if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) == | |
348 | (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { | |
349 | ||
350 | /* if non-NULL, laio_init() has already been run */ | |
351 | if (*aio_ctx == NULL) { | |
352 | *aio_ctx = laio_init(); | |
353 | if (!*aio_ctx) { | |
354 | goto error; | |
355 | } | |
356 | } | |
357 | *use_aio = 1; | |
358 | } else { | |
359 | *use_aio = 0; | |
360 | } | |
361 | ||
362 | ret = 0; | |
363 | ||
364 | error: | |
365 | return ret; | |
366 | } | |
367 | #endif | |
368 | ||
078896a9 HR |
369 | static void raw_parse_filename(const char *filename, QDict *options, |
370 | Error **errp) | |
371 | { | |
372 | /* The filename does not have to be prefixed by the protocol name, since | |
373 | * "file" is the default protocol; therefore, the return value of this | |
374 | * function call can be ignored. */ | |
375 | strstart(filename, "file:", &filename); | |
376 | ||
377 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
378 | } | |
379 | ||
c66a6157 KW |
380 | static QemuOptsList raw_runtime_opts = { |
381 | .name = "raw", | |
382 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
383 | .desc = { | |
384 | { | |
385 | .name = "filename", | |
386 | .type = QEMU_OPT_STRING, | |
387 | .help = "File name of the image", | |
388 | }, | |
389 | { /* end of list */ } | |
390 | }, | |
391 | }; | |
392 | ||
393 | static int raw_open_common(BlockDriverState *bs, QDict *options, | |
e428e439 | 394 | int bdrv_flags, int open_flags, Error **errp) |
83f64091 FB |
395 | { |
396 | BDRVRawState *s = bs->opaque; | |
c66a6157 KW |
397 | QemuOpts *opts; |
398 | Error *local_err = NULL; | |
8bfea15d | 399 | const char *filename = NULL; |
0e1d8f4c | 400 | int fd, ret; |
260a82e5 | 401 | struct stat st; |
83f64091 | 402 | |
87ea75d5 | 403 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
c66a6157 | 404 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 405 | if (local_err) { |
e428e439 | 406 | error_propagate(errp, local_err); |
c66a6157 KW |
407 | ret = -EINVAL; |
408 | goto fail; | |
409 | } | |
410 | ||
411 | filename = qemu_opt_get(opts, "filename"); | |
412 | ||
1de1ae0a CE |
413 | ret = raw_normalize_devicepath(&filename); |
414 | if (ret != 0) { | |
e428e439 | 415 | error_setg_errno(errp, -ret, "Could not normalize device path"); |
c66a6157 | 416 | goto fail; |
1de1ae0a CE |
417 | } |
418 | ||
6a8dc042 JC |
419 | s->open_flags = open_flags; |
420 | raw_parse_flags(bdrv_flags, &s->open_flags); | |
83f64091 | 421 | |
90babde0 | 422 | s->fd = -1; |
40ff6d7e | 423 | fd = qemu_open(filename, s->open_flags, 0644); |
19cb3738 FB |
424 | if (fd < 0) { |
425 | ret = -errno; | |
c66a6157 | 426 | if (ret == -EROFS) { |
19cb3738 | 427 | ret = -EACCES; |
c66a6157 KW |
428 | } |
429 | goto fail; | |
19cb3738 | 430 | } |
83f64091 | 431 | s->fd = fd; |
9ef91a67 | 432 | |
5c6c3a6c | 433 | #ifdef CONFIG_LINUX_AIO |
fc32a72d | 434 | if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) { |
47e6b251 | 435 | qemu_close(fd); |
c66a6157 | 436 | ret = -errno; |
e428e439 | 437 | error_setg_errno(errp, -ret, "Could not set AIO state"); |
c66a6157 | 438 | goto fail; |
9ef91a67 | 439 | } |
fc32a72d | 440 | #endif |
9ef91a67 | 441 | |
7ce21016 | 442 | s->has_discard = true; |
97a2ae34 | 443 | s->has_write_zeroes = true; |
3cad8307 RPM |
444 | if ((bs->open_flags & BDRV_O_NOCACHE) != 0) { |
445 | s->needs_alignment = true; | |
446 | } | |
260a82e5 PB |
447 | |
448 | if (fstat(s->fd, &st) < 0) { | |
01212d4e | 449 | ret = -errno; |
260a82e5 PB |
450 | error_setg_errno(errp, errno, "Could not stat file"); |
451 | goto fail; | |
452 | } | |
453 | if (S_ISREG(st.st_mode)) { | |
454 | s->discard_zeroes = true; | |
455 | } | |
d0b4503e PB |
456 | if (S_ISBLK(st.st_mode)) { |
457 | #ifdef BLKDISCARDZEROES | |
458 | unsigned int arg; | |
459 | if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) { | |
460 | s->discard_zeroes = true; | |
461 | } | |
462 | #endif | |
463 | #ifdef __linux__ | |
464 | /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do | |
465 | * not rely on the contents of discarded blocks unless using O_DIRECT. | |
97a2ae34 | 466 | * Same for BLKZEROOUT. |
d0b4503e PB |
467 | */ |
468 | if (!(bs->open_flags & BDRV_O_NOCACHE)) { | |
469 | s->discard_zeroes = false; | |
97a2ae34 | 470 | s->has_write_zeroes = false; |
d0b4503e PB |
471 | } |
472 | #endif | |
473 | } | |
3cad8307 RPM |
474 | #ifdef __FreeBSD__ |
475 | if (S_ISCHR(st.st_mode)) { | |
476 | /* | |
477 | * The file is a char device (disk), which on FreeBSD isn't behind | |
478 | * a pager, so force all requests to be aligned. This is needed | |
479 | * so QEMU makes sure all IO operations on the device are aligned | |
480 | * to sector size, or else FreeBSD will reject them with EINVAL. | |
481 | */ | |
482 | s->needs_alignment = true; | |
483 | } | |
484 | #endif | |
260a82e5 | 485 | |
dce512de CH |
486 | #ifdef CONFIG_XFS |
487 | if (platform_test_xfs_fd(s->fd)) { | |
7ce21016 | 488 | s->is_xfs = true; |
dce512de CH |
489 | } |
490 | #endif | |
491 | ||
c2f3426c SH |
492 | raw_attach_aio_context(bs, bdrv_get_aio_context(bs)); |
493 | ||
c66a6157 KW |
494 | ret = 0; |
495 | fail: | |
8bfea15d KW |
496 | if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { |
497 | unlink(filename); | |
498 | } | |
c66a6157 KW |
499 | qemu_opts_del(opts); |
500 | return ret; | |
83f64091 FB |
501 | } |
502 | ||
015a1036 HR |
503 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
504 | Error **errp) | |
90babde0 CH |
505 | { |
506 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
507 | Error *local_err = NULL; |
508 | int ret; | |
90babde0 CH |
509 | |
510 | s->type = FTYPE_FILE; | |
e428e439 | 511 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
84d18f06 | 512 | if (local_err) { |
e428e439 HR |
513 | error_propagate(errp, local_err); |
514 | } | |
515 | return ret; | |
90babde0 CH |
516 | } |
517 | ||
eeb6b45d JC |
518 | static int raw_reopen_prepare(BDRVReopenState *state, |
519 | BlockReopenQueue *queue, Error **errp) | |
520 | { | |
521 | BDRVRawState *s; | |
522 | BDRVRawReopenState *raw_s; | |
523 | int ret = 0; | |
df26a350 | 524 | Error *local_err = NULL; |
eeb6b45d JC |
525 | |
526 | assert(state != NULL); | |
527 | assert(state->bs != NULL); | |
528 | ||
529 | s = state->bs->opaque; | |
530 | ||
5839e53b | 531 | state->opaque = g_new0(BDRVRawReopenState, 1); |
eeb6b45d JC |
532 | raw_s = state->opaque; |
533 | ||
534 | #ifdef CONFIG_LINUX_AIO | |
535 | raw_s->use_aio = s->use_aio; | |
536 | ||
537 | /* we can use s->aio_ctx instead of a copy, because the use_aio flag is | |
538 | * valid in the 'false' condition even if aio_ctx is set, and raw_set_aio() | |
539 | * won't override aio_ctx if aio_ctx is non-NULL */ | |
540 | if (raw_set_aio(&s->aio_ctx, &raw_s->use_aio, state->flags)) { | |
e428e439 | 541 | error_setg(errp, "Could not set AIO state"); |
eeb6b45d JC |
542 | return -1; |
543 | } | |
544 | #endif | |
545 | ||
1bc6b705 JC |
546 | if (s->type == FTYPE_FD || s->type == FTYPE_CD) { |
547 | raw_s->open_flags |= O_NONBLOCK; | |
548 | } | |
549 | ||
eeb6b45d JC |
550 | raw_parse_flags(state->flags, &raw_s->open_flags); |
551 | ||
552 | raw_s->fd = -1; | |
553 | ||
fdf263f6 | 554 | int fcntl_flags = O_APPEND | O_NONBLOCK; |
eeb6b45d JC |
555 | #ifdef O_NOATIME |
556 | fcntl_flags |= O_NOATIME; | |
557 | #endif | |
558 | ||
fdf263f6 AF |
559 | #ifdef O_ASYNC |
560 | /* Not all operating systems have O_ASYNC, and those that don't | |
561 | * will not let us track the state into raw_s->open_flags (typically | |
562 | * you achieve the same effect with an ioctl, for example I_SETSIG | |
563 | * on Solaris). But we do not use O_ASYNC, so that's fine. | |
564 | */ | |
565 | assert((s->open_flags & O_ASYNC) == 0); | |
566 | #endif | |
567 | ||
eeb6b45d JC |
568 | if ((raw_s->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { |
569 | /* dup the original fd */ | |
570 | /* TODO: use qemu fcntl wrapper */ | |
571 | #ifdef F_DUPFD_CLOEXEC | |
572 | raw_s->fd = fcntl(s->fd, F_DUPFD_CLOEXEC, 0); | |
573 | #else | |
574 | raw_s->fd = dup(s->fd); | |
575 | if (raw_s->fd != -1) { | |
576 | qemu_set_cloexec(raw_s->fd); | |
577 | } | |
578 | #endif | |
579 | if (raw_s->fd >= 0) { | |
580 | ret = fcntl_setfl(raw_s->fd, raw_s->open_flags); | |
581 | if (ret) { | |
582 | qemu_close(raw_s->fd); | |
583 | raw_s->fd = -1; | |
584 | } | |
585 | } | |
586 | } | |
587 | ||
588 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ | |
589 | if (raw_s->fd == -1) { | |
590 | assert(!(raw_s->open_flags & O_CREAT)); | |
591 | raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags); | |
592 | if (raw_s->fd == -1) { | |
e428e439 | 593 | error_setg_errno(errp, errno, "Could not reopen file"); |
eeb6b45d JC |
594 | ret = -1; |
595 | } | |
596 | } | |
df26a350 KW |
597 | |
598 | /* Fail already reopen_prepare() if we can't get a working O_DIRECT | |
599 | * alignment with the new fd. */ | |
600 | if (raw_s->fd != -1) { | |
601 | raw_probe_alignment(state->bs, raw_s->fd, &local_err); | |
602 | if (local_err) { | |
603 | qemu_close(raw_s->fd); | |
604 | raw_s->fd = -1; | |
605 | error_propagate(errp, local_err); | |
606 | ret = -EINVAL; | |
607 | } | |
608 | } | |
609 | ||
eeb6b45d JC |
610 | return ret; |
611 | } | |
612 | ||
eeb6b45d JC |
613 | static void raw_reopen_commit(BDRVReopenState *state) |
614 | { | |
615 | BDRVRawReopenState *raw_s = state->opaque; | |
616 | BDRVRawState *s = state->bs->opaque; | |
617 | ||
618 | s->open_flags = raw_s->open_flags; | |
619 | ||
620 | qemu_close(s->fd); | |
621 | s->fd = raw_s->fd; | |
622 | #ifdef CONFIG_LINUX_AIO | |
623 | s->use_aio = raw_s->use_aio; | |
624 | #endif | |
625 | ||
626 | g_free(state->opaque); | |
627 | state->opaque = NULL; | |
628 | } | |
629 | ||
630 | ||
631 | static void raw_reopen_abort(BDRVReopenState *state) | |
632 | { | |
633 | BDRVRawReopenState *raw_s = state->opaque; | |
634 | ||
635 | /* nothing to do if NULL, we didn't get far enough */ | |
636 | if (raw_s == NULL) { | |
637 | return; | |
638 | } | |
639 | ||
640 | if (raw_s->fd >= 0) { | |
641 | qemu_close(raw_s->fd); | |
642 | raw_s->fd = -1; | |
643 | } | |
644 | g_free(state->opaque); | |
645 | state->opaque = NULL; | |
646 | } | |
647 | ||
3baca891 | 648 | static void raw_refresh_limits(BlockDriverState *bs, Error **errp) |
c25f53b0 PB |
649 | { |
650 | BDRVRawState *s = bs->opaque; | |
eeb6b45d | 651 | |
df26a350 | 652 | raw_probe_alignment(bs, s->fd, errp); |
c25f53b0 | 653 | bs->bl.opt_mem_alignment = s->buf_align; |
c25f53b0 | 654 | } |
83f64091 | 655 | |
de81a169 PB |
656 | static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb) |
657 | { | |
658 | int ret; | |
659 | ||
660 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); | |
661 | if (ret == -1) { | |
662 | return -errno; | |
663 | } | |
664 | ||
b608c8dc | 665 | return 0; |
de81a169 PB |
666 | } |
667 | ||
668 | static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb) | |
669 | { | |
670 | int ret; | |
671 | ||
672 | ret = qemu_fdatasync(aiocb->aio_fildes); | |
673 | if (ret == -1) { | |
674 | return -errno; | |
675 | } | |
676 | return 0; | |
677 | } | |
678 | ||
679 | #ifdef CONFIG_PREADV | |
680 | ||
681 | static bool preadv_present = true; | |
682 | ||
683 | static ssize_t | |
684 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
685 | { | |
686 | return preadv(fd, iov, nr_iov, offset); | |
687 | } | |
688 | ||
689 | static ssize_t | |
690 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
691 | { | |
692 | return pwritev(fd, iov, nr_iov, offset); | |
693 | } | |
694 | ||
695 | #else | |
696 | ||
697 | static bool preadv_present = false; | |
698 | ||
699 | static ssize_t | |
700 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
701 | { | |
702 | return -ENOSYS; | |
703 | } | |
704 | ||
705 | static ssize_t | |
706 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
707 | { | |
708 | return -ENOSYS; | |
709 | } | |
710 | ||
711 | #endif | |
712 | ||
713 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) | |
714 | { | |
715 | ssize_t len; | |
716 | ||
717 | do { | |
718 | if (aiocb->aio_type & QEMU_AIO_WRITE) | |
719 | len = qemu_pwritev(aiocb->aio_fildes, | |
720 | aiocb->aio_iov, | |
721 | aiocb->aio_niov, | |
722 | aiocb->aio_offset); | |
723 | else | |
724 | len = qemu_preadv(aiocb->aio_fildes, | |
725 | aiocb->aio_iov, | |
726 | aiocb->aio_niov, | |
727 | aiocb->aio_offset); | |
728 | } while (len == -1 && errno == EINTR); | |
729 | ||
730 | if (len == -1) { | |
731 | return -errno; | |
732 | } | |
733 | return len; | |
734 | } | |
735 | ||
736 | /* | |
737 | * Read/writes the data to/from a given linear buffer. | |
738 | * | |
739 | * Returns the number of bytes handles or -errno in case of an error. Short | |
740 | * reads are only returned if the end of the file is reached. | |
741 | */ | |
742 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) | |
743 | { | |
744 | ssize_t offset = 0; | |
745 | ssize_t len; | |
746 | ||
747 | while (offset < aiocb->aio_nbytes) { | |
748 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
749 | len = pwrite(aiocb->aio_fildes, | |
750 | (const char *)buf + offset, | |
751 | aiocb->aio_nbytes - offset, | |
752 | aiocb->aio_offset + offset); | |
753 | } else { | |
754 | len = pread(aiocb->aio_fildes, | |
755 | buf + offset, | |
756 | aiocb->aio_nbytes - offset, | |
757 | aiocb->aio_offset + offset); | |
758 | } | |
759 | if (len == -1 && errno == EINTR) { | |
760 | continue; | |
61ed73cf SH |
761 | } else if (len == -1 && errno == EINVAL && |
762 | (aiocb->bs->open_flags & BDRV_O_NOCACHE) && | |
763 | !(aiocb->aio_type & QEMU_AIO_WRITE) && | |
764 | offset > 0) { | |
765 | /* O_DIRECT pread() may fail with EINVAL when offset is unaligned | |
766 | * after a short read. Assume that O_DIRECT short reads only occur | |
767 | * at EOF. Therefore this is a short read, not an I/O error. | |
768 | */ | |
769 | break; | |
de81a169 PB |
770 | } else if (len == -1) { |
771 | offset = -errno; | |
772 | break; | |
773 | } else if (len == 0) { | |
774 | break; | |
775 | } | |
776 | offset += len; | |
777 | } | |
778 | ||
779 | return offset; | |
780 | } | |
781 | ||
782 | static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) | |
783 | { | |
784 | ssize_t nbytes; | |
785 | char *buf; | |
786 | ||
787 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { | |
788 | /* | |
789 | * If there is just a single buffer, and it is properly aligned | |
790 | * we can just use plain pread/pwrite without any problems. | |
791 | */ | |
792 | if (aiocb->aio_niov == 1) { | |
793 | return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base); | |
794 | } | |
795 | /* | |
796 | * We have more than one iovec, and all are properly aligned. | |
797 | * | |
798 | * Try preadv/pwritev first and fall back to linearizing the | |
799 | * buffer if it's not supported. | |
800 | */ | |
801 | if (preadv_present) { | |
802 | nbytes = handle_aiocb_rw_vector(aiocb); | |
803 | if (nbytes == aiocb->aio_nbytes || | |
804 | (nbytes < 0 && nbytes != -ENOSYS)) { | |
805 | return nbytes; | |
806 | } | |
807 | preadv_present = false; | |
808 | } | |
809 | ||
810 | /* | |
811 | * XXX(hch): short read/write. no easy way to handle the reminder | |
812 | * using these interfaces. For now retry using plain | |
813 | * pread/pwrite? | |
814 | */ | |
815 | } | |
816 | ||
817 | /* | |
818 | * Ok, we have to do it the hard way, copy all segments into | |
819 | * a single aligned buffer. | |
820 | */ | |
50d4a858 KW |
821 | buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes); |
822 | if (buf == NULL) { | |
823 | return -ENOMEM; | |
824 | } | |
825 | ||
de81a169 PB |
826 | if (aiocb->aio_type & QEMU_AIO_WRITE) { |
827 | char *p = buf; | |
828 | int i; | |
829 | ||
830 | for (i = 0; i < aiocb->aio_niov; ++i) { | |
831 | memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len); | |
832 | p += aiocb->aio_iov[i].iov_len; | |
833 | } | |
8eb029c2 | 834 | assert(p - buf == aiocb->aio_nbytes); |
de81a169 PB |
835 | } |
836 | ||
837 | nbytes = handle_aiocb_rw_linear(aiocb, buf); | |
838 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { | |
839 | char *p = buf; | |
840 | size_t count = aiocb->aio_nbytes, copy; | |
841 | int i; | |
842 | ||
843 | for (i = 0; i < aiocb->aio_niov && count; ++i) { | |
844 | copy = count; | |
845 | if (copy > aiocb->aio_iov[i].iov_len) { | |
846 | copy = aiocb->aio_iov[i].iov_len; | |
847 | } | |
848 | memcpy(aiocb->aio_iov[i].iov_base, p, copy); | |
8eb029c2 | 849 | assert(count >= copy); |
de81a169 PB |
850 | p += copy; |
851 | count -= copy; | |
852 | } | |
8eb029c2 | 853 | assert(count == 0); |
de81a169 PB |
854 | } |
855 | qemu_vfree(buf); | |
856 | ||
857 | return nbytes; | |
858 | } | |
859 | ||
8238010b | 860 | #ifdef CONFIG_XFS |
97a2ae34 PB |
861 | static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes) |
862 | { | |
863 | struct xfs_flock64 fl; | |
864 | ||
865 | memset(&fl, 0, sizeof(fl)); | |
866 | fl.l_whence = SEEK_SET; | |
867 | fl.l_start = offset; | |
868 | fl.l_len = bytes; | |
869 | ||
870 | if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) { | |
871 | DEBUG_BLOCK_PRINT("cannot write zero range (%s)\n", strerror(errno)); | |
872 | return -errno; | |
873 | } | |
874 | ||
875 | return 0; | |
876 | } | |
877 | ||
8238010b PB |
878 | static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes) |
879 | { | |
880 | struct xfs_flock64 fl; | |
881 | ||
882 | memset(&fl, 0, sizeof(fl)); | |
883 | fl.l_whence = SEEK_SET; | |
884 | fl.l_start = offset; | |
885 | fl.l_len = bytes; | |
886 | ||
887 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
888 | DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno)); | |
889 | return -errno; | |
890 | } | |
891 | ||
892 | return 0; | |
893 | } | |
894 | #endif | |
895 | ||
1486df0e DL |
896 | static int translate_err(int err) |
897 | { | |
898 | if (err == -ENODEV || err == -ENOSYS || err == -EOPNOTSUPP || | |
899 | err == -ENOTTY) { | |
900 | err = -ENOTSUP; | |
901 | } | |
902 | return err; | |
903 | } | |
904 | ||
97a2ae34 PB |
905 | static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) |
906 | { | |
907 | int ret = -EOPNOTSUPP; | |
908 | BDRVRawState *s = aiocb->bs->opaque; | |
909 | ||
910 | if (s->has_write_zeroes == 0) { | |
911 | return -ENOTSUP; | |
912 | } | |
913 | ||
914 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
915 | #ifdef BLKZEROOUT | |
916 | do { | |
917 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
918 | if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) { | |
919 | return 0; | |
920 | } | |
921 | } while (errno == EINTR); | |
922 | ||
923 | ret = -errno; | |
924 | #endif | |
925 | } else { | |
926 | #ifdef CONFIG_XFS | |
927 | if (s->is_xfs) { | |
928 | return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
929 | } | |
930 | #endif | |
931 | } | |
932 | ||
1486df0e DL |
933 | ret = translate_err(ret); |
934 | if (ret == -ENOTSUP) { | |
97a2ae34 | 935 | s->has_write_zeroes = false; |
97a2ae34 PB |
936 | } |
937 | return ret; | |
938 | } | |
939 | ||
8238010b PB |
940 | static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb) |
941 | { | |
942 | int ret = -EOPNOTSUPP; | |
943 | BDRVRawState *s = aiocb->bs->opaque; | |
944 | ||
7ce21016 PB |
945 | if (!s->has_discard) { |
946 | return -ENOTSUP; | |
8238010b PB |
947 | } |
948 | ||
949 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
950 | #ifdef BLKDISCARD | |
951 | do { | |
952 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
953 | if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) { | |
954 | return 0; | |
955 | } | |
956 | } while (errno == EINTR); | |
957 | ||
958 | ret = -errno; | |
959 | #endif | |
960 | } else { | |
961 | #ifdef CONFIG_XFS | |
962 | if (s->is_xfs) { | |
963 | return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
964 | } | |
965 | #endif | |
966 | ||
967 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE | |
968 | do { | |
969 | if (fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, | |
970 | aiocb->aio_offset, aiocb->aio_nbytes) == 0) { | |
971 | return 0; | |
972 | } | |
973 | } while (errno == EINTR); | |
974 | ||
975 | ret = -errno; | |
976 | #endif | |
977 | } | |
978 | ||
1486df0e DL |
979 | ret = translate_err(ret); |
980 | if (ret == -ENOTSUP) { | |
7ce21016 | 981 | s->has_discard = false; |
8238010b PB |
982 | } |
983 | return ret; | |
984 | } | |
985 | ||
de81a169 PB |
986 | static int aio_worker(void *arg) |
987 | { | |
988 | RawPosixAIOData *aiocb = arg; | |
989 | ssize_t ret = 0; | |
990 | ||
991 | switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) { | |
992 | case QEMU_AIO_READ: | |
993 | ret = handle_aiocb_rw(aiocb); | |
994 | if (ret >= 0 && ret < aiocb->aio_nbytes && aiocb->bs->growable) { | |
995 | iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret, | |
996 | 0, aiocb->aio_nbytes - ret); | |
997 | ||
998 | ret = aiocb->aio_nbytes; | |
999 | } | |
1000 | if (ret == aiocb->aio_nbytes) { | |
1001 | ret = 0; | |
1002 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
1003 | ret = -EINVAL; | |
1004 | } | |
1005 | break; | |
1006 | case QEMU_AIO_WRITE: | |
1007 | ret = handle_aiocb_rw(aiocb); | |
1008 | if (ret == aiocb->aio_nbytes) { | |
1009 | ret = 0; | |
1010 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
1011 | ret = -EINVAL; | |
1012 | } | |
1013 | break; | |
1014 | case QEMU_AIO_FLUSH: | |
1015 | ret = handle_aiocb_flush(aiocb); | |
1016 | break; | |
1017 | case QEMU_AIO_IOCTL: | |
1018 | ret = handle_aiocb_ioctl(aiocb); | |
1019 | break; | |
8238010b PB |
1020 | case QEMU_AIO_DISCARD: |
1021 | ret = handle_aiocb_discard(aiocb); | |
1022 | break; | |
97a2ae34 PB |
1023 | case QEMU_AIO_WRITE_ZEROES: |
1024 | ret = handle_aiocb_write_zeroes(aiocb); | |
1025 | break; | |
de81a169 PB |
1026 | default: |
1027 | fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); | |
1028 | ret = -EINVAL; | |
1029 | break; | |
1030 | } | |
1031 | ||
1032 | g_slice_free(RawPosixAIOData, aiocb); | |
1033 | return ret; | |
1034 | } | |
1035 | ||
260a82e5 PB |
1036 | static int paio_submit_co(BlockDriverState *bs, int fd, |
1037 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1038 | int type) | |
1039 | { | |
1040 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
1041 | ThreadPool *pool; | |
1042 | ||
1043 | acb->bs = bs; | |
1044 | acb->aio_type = type; | |
1045 | acb->aio_fildes = fd; | |
1046 | ||
8eb029c2 KW |
1047 | acb->aio_nbytes = nb_sectors * BDRV_SECTOR_SIZE; |
1048 | acb->aio_offset = sector_num * BDRV_SECTOR_SIZE; | |
1049 | ||
260a82e5 PB |
1050 | if (qiov) { |
1051 | acb->aio_iov = qiov->iov; | |
1052 | acb->aio_niov = qiov->niov; | |
8eb029c2 | 1053 | assert(qiov->size == acb->aio_nbytes); |
260a82e5 | 1054 | } |
260a82e5 PB |
1055 | |
1056 | trace_paio_submit_co(sector_num, nb_sectors, type); | |
1057 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); | |
1058 | return thread_pool_submit_co(pool, aio_worker, acb); | |
1059 | } | |
1060 | ||
7c84b1b8 | 1061 | static BlockAIOCB *paio_submit(BlockDriverState *bs, int fd, |
de81a169 | 1062 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
097310b5 | 1063 | BlockCompletionFunc *cb, void *opaque, int type) |
de81a169 PB |
1064 | { |
1065 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
c4d9d196 | 1066 | ThreadPool *pool; |
de81a169 PB |
1067 | |
1068 | acb->bs = bs; | |
1069 | acb->aio_type = type; | |
1070 | acb->aio_fildes = fd; | |
1071 | ||
8eb029c2 KW |
1072 | acb->aio_nbytes = nb_sectors * BDRV_SECTOR_SIZE; |
1073 | acb->aio_offset = sector_num * BDRV_SECTOR_SIZE; | |
1074 | ||
de81a169 PB |
1075 | if (qiov) { |
1076 | acb->aio_iov = qiov->iov; | |
1077 | acb->aio_niov = qiov->niov; | |
8eb029c2 | 1078 | assert(qiov->size == acb->aio_nbytes); |
de81a169 | 1079 | } |
de81a169 PB |
1080 | |
1081 | trace_paio_submit(acb, opaque, sector_num, nb_sectors, type); | |
c4d9d196 SH |
1082 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1083 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
de81a169 PB |
1084 | } |
1085 | ||
7c84b1b8 | 1086 | static BlockAIOCB *raw_aio_submit(BlockDriverState *bs, |
9ef91a67 | 1087 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
097310b5 | 1088 | BlockCompletionFunc *cb, void *opaque, int type) |
83f64091 | 1089 | { |
ce1a14dc | 1090 | BDRVRawState *s = bs->opaque; |
ce1a14dc | 1091 | |
19cb3738 FB |
1092 | if (fd_open(bs) < 0) |
1093 | return NULL; | |
1094 | ||
f141eafe | 1095 | /* |
3cad8307 RPM |
1096 | * Check if the underlying device requires requests to be aligned, |
1097 | * and if the request we are trying to submit is aligned or not. | |
1098 | * If this is the case tell the low-level driver that it needs | |
1099 | * to copy the buffer. | |
f141eafe | 1100 | */ |
3cad8307 | 1101 | if (s->needs_alignment) { |
c53b1c51 | 1102 | if (!bdrv_qiov_is_aligned(bs, qiov)) { |
5c6c3a6c | 1103 | type |= QEMU_AIO_MISALIGNED; |
e44bd6fc | 1104 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c CH |
1105 | } else if (s->use_aio) { |
1106 | return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, | |
e44bd6fc SW |
1107 | nb_sectors, cb, opaque, type); |
1108 | #endif | |
5c6c3a6c | 1109 | } |
9ef91a67 | 1110 | } |
f141eafe | 1111 | |
1e5b9d2f | 1112 | return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors, |
9ef91a67 | 1113 | cb, opaque, type); |
83f64091 FB |
1114 | } |
1115 | ||
1b3abdcc ML |
1116 | static void raw_aio_plug(BlockDriverState *bs) |
1117 | { | |
1118 | #ifdef CONFIG_LINUX_AIO | |
1119 | BDRVRawState *s = bs->opaque; | |
1120 | if (s->use_aio) { | |
1121 | laio_io_plug(bs, s->aio_ctx); | |
1122 | } | |
1123 | #endif | |
1124 | } | |
1125 | ||
1126 | static void raw_aio_unplug(BlockDriverState *bs) | |
1127 | { | |
1128 | #ifdef CONFIG_LINUX_AIO | |
1129 | BDRVRawState *s = bs->opaque; | |
1130 | if (s->use_aio) { | |
1131 | laio_io_unplug(bs, s->aio_ctx, true); | |
1132 | } | |
1133 | #endif | |
1134 | } | |
1135 | ||
1136 | static void raw_aio_flush_io_queue(BlockDriverState *bs) | |
1137 | { | |
1138 | #ifdef CONFIG_LINUX_AIO | |
1139 | BDRVRawState *s = bs->opaque; | |
1140 | if (s->use_aio) { | |
1141 | laio_io_unplug(bs, s->aio_ctx, false); | |
1142 | } | |
1143 | #endif | |
1144 | } | |
1145 | ||
7c84b1b8 | 1146 | static BlockAIOCB *raw_aio_readv(BlockDriverState *bs, |
f141eafe | 1147 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
097310b5 | 1148 | BlockCompletionFunc *cb, void *opaque) |
83f64091 | 1149 | { |
9ef91a67 CH |
1150 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
1151 | cb, opaque, QEMU_AIO_READ); | |
83f64091 FB |
1152 | } |
1153 | ||
7c84b1b8 | 1154 | static BlockAIOCB *raw_aio_writev(BlockDriverState *bs, |
f141eafe | 1155 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
097310b5 | 1156 | BlockCompletionFunc *cb, void *opaque) |
83f64091 | 1157 | { |
9ef91a67 CH |
1158 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
1159 | cb, opaque, QEMU_AIO_WRITE); | |
83f64091 | 1160 | } |
53538725 | 1161 | |
7c84b1b8 | 1162 | static BlockAIOCB *raw_aio_flush(BlockDriverState *bs, |
097310b5 | 1163 | BlockCompletionFunc *cb, void *opaque) |
b2e12bc6 CH |
1164 | { |
1165 | BDRVRawState *s = bs->opaque; | |
1166 | ||
1167 | if (fd_open(bs) < 0) | |
1168 | return NULL; | |
1169 | ||
1e5b9d2f | 1170 | return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
b2e12bc6 CH |
1171 | } |
1172 | ||
83f64091 FB |
1173 | static void raw_close(BlockDriverState *bs) |
1174 | { | |
1175 | BDRVRawState *s = bs->opaque; | |
c2f3426c SH |
1176 | |
1177 | raw_detach_aio_context(bs); | |
1178 | ||
abd269b7 SH |
1179 | #ifdef CONFIG_LINUX_AIO |
1180 | if (s->use_aio) { | |
1181 | laio_cleanup(s->aio_ctx); | |
1182 | } | |
1183 | #endif | |
19cb3738 | 1184 | if (s->fd >= 0) { |
2e1e79da | 1185 | qemu_close(s->fd); |
19cb3738 FB |
1186 | s->fd = -1; |
1187 | } | |
83f64091 FB |
1188 | } |
1189 | ||
1190 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
1191 | { | |
1192 | BDRVRawState *s = bs->opaque; | |
55b949c8 CH |
1193 | struct stat st; |
1194 | ||
1195 | if (fstat(s->fd, &st)) { | |
83f64091 | 1196 | return -errno; |
55b949c8 CH |
1197 | } |
1198 | ||
1199 | if (S_ISREG(st.st_mode)) { | |
1200 | if (ftruncate(s->fd, offset) < 0) { | |
1201 | return -errno; | |
1202 | } | |
1203 | } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1204 | if (offset > raw_getlength(bs)) { | |
1205 | return -EINVAL; | |
1206 | } | |
1207 | } else { | |
1208 | return -ENOTSUP; | |
1209 | } | |
1210 | ||
83f64091 FB |
1211 | return 0; |
1212 | } | |
1213 | ||
128ab2ff BS |
1214 | #ifdef __OpenBSD__ |
1215 | static int64_t raw_getlength(BlockDriverState *bs) | |
1216 | { | |
1217 | BDRVRawState *s = bs->opaque; | |
1218 | int fd = s->fd; | |
1219 | struct stat st; | |
1220 | ||
1221 | if (fstat(fd, &st)) | |
aa729704 | 1222 | return -errno; |
128ab2ff BS |
1223 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
1224 | struct disklabel dl; | |
1225 | ||
1226 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
aa729704 | 1227 | return -errno; |
128ab2ff BS |
1228 | return (uint64_t)dl.d_secsize * |
1229 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1230 | } else | |
1231 | return st.st_size; | |
1232 | } | |
d1f6fd8d CE |
1233 | #elif defined(__NetBSD__) |
1234 | static int64_t raw_getlength(BlockDriverState *bs) | |
1235 | { | |
1236 | BDRVRawState *s = bs->opaque; | |
1237 | int fd = s->fd; | |
1238 | struct stat st; | |
1239 | ||
1240 | if (fstat(fd, &st)) | |
aa729704 | 1241 | return -errno; |
d1f6fd8d CE |
1242 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
1243 | struct dkwedge_info dkw; | |
1244 | ||
1245 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
1246 | return dkw.dkw_size * 512; | |
1247 | } else { | |
1248 | struct disklabel dl; | |
1249 | ||
1250 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
aa729704 | 1251 | return -errno; |
d1f6fd8d CE |
1252 | return (uint64_t)dl.d_secsize * |
1253 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1254 | } | |
1255 | } else | |
1256 | return st.st_size; | |
1257 | } | |
50779cc2 CH |
1258 | #elif defined(__sun__) |
1259 | static int64_t raw_getlength(BlockDriverState *bs) | |
1260 | { | |
1261 | BDRVRawState *s = bs->opaque; | |
1262 | struct dk_minfo minfo; | |
1263 | int ret; | |
aa729704 | 1264 | int64_t size; |
50779cc2 CH |
1265 | |
1266 | ret = fd_open(bs); | |
1267 | if (ret < 0) { | |
1268 | return ret; | |
1269 | } | |
1270 | ||
1271 | /* | |
1272 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
1273 | */ | |
1274 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
1275 | if (ret != -1) { | |
1276 | return minfo.dki_lbsize * minfo.dki_capacity; | |
1277 | } | |
1278 | ||
1279 | /* | |
1280 | * There are reports that lseek on some devices fails, but | |
1281 | * irc discussion said that contingency on contingency was overkill. | |
1282 | */ | |
aa729704 MA |
1283 | size = lseek(s->fd, 0, SEEK_END); |
1284 | if (size < 0) { | |
1285 | return -errno; | |
1286 | } | |
1287 | return size; | |
50779cc2 CH |
1288 | } |
1289 | #elif defined(CONFIG_BSD) | |
1290 | static int64_t raw_getlength(BlockDriverState *bs) | |
83f64091 FB |
1291 | { |
1292 | BDRVRawState *s = bs->opaque; | |
1293 | int fd = s->fd; | |
1294 | int64_t size; | |
83f64091 | 1295 | struct stat sb; |
a167ba50 | 1296 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a | 1297 | int reopened = 0; |
83f64091 | 1298 | #endif |
19cb3738 FB |
1299 | int ret; |
1300 | ||
1301 | ret = fd_open(bs); | |
1302 | if (ret < 0) | |
1303 | return ret; | |
83f64091 | 1304 | |
a167ba50 | 1305 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1306 | again: |
1307 | #endif | |
83f64091 FB |
1308 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
1309 | #ifdef DIOCGMEDIASIZE | |
1310 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
c5e97233 BS |
1311 | #elif defined(DIOCGPART) |
1312 | { | |
1313 | struct partinfo pi; | |
1314 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
1315 | size = pi.media_size; | |
1316 | else | |
1317 | size = 0; | |
1318 | } | |
1319 | if (size == 0) | |
83f64091 | 1320 | #endif |
83affaa6 | 1321 | #if defined(__APPLE__) && defined(__MACH__) |
675036e4 | 1322 | size = LLONG_MAX; |
83f64091 FB |
1323 | #else |
1324 | size = lseek(fd, 0LL, SEEK_END); | |
aa729704 MA |
1325 | if (size < 0) { |
1326 | return -errno; | |
1327 | } | |
9f23011a | 1328 | #endif |
a167ba50 | 1329 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1330 | switch(s->type) { |
1331 | case FTYPE_CD: | |
1332 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
1333 | if (size == 2048LL * (unsigned)-1) | |
1334 | size = 0; | |
1335 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 1336 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
1337 | reopened = 1; |
1338 | goto again; | |
1339 | } | |
1340 | } | |
83f64091 | 1341 | #endif |
50779cc2 | 1342 | } else { |
83f64091 | 1343 | size = lseek(fd, 0, SEEK_END); |
aa729704 MA |
1344 | if (size < 0) { |
1345 | return -errno; | |
1346 | } | |
83f64091 | 1347 | } |
83f64091 FB |
1348 | return size; |
1349 | } | |
50779cc2 CH |
1350 | #else |
1351 | static int64_t raw_getlength(BlockDriverState *bs) | |
1352 | { | |
1353 | BDRVRawState *s = bs->opaque; | |
1354 | int ret; | |
aa729704 | 1355 | int64_t size; |
50779cc2 CH |
1356 | |
1357 | ret = fd_open(bs); | |
1358 | if (ret < 0) { | |
1359 | return ret; | |
1360 | } | |
1361 | ||
aa729704 MA |
1362 | size = lseek(s->fd, 0, SEEK_END); |
1363 | if (size < 0) { | |
1364 | return -errno; | |
1365 | } | |
1366 | return size; | |
50779cc2 | 1367 | } |
128ab2ff | 1368 | #endif |
83f64091 | 1369 | |
4a1d5e1f FZ |
1370 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
1371 | { | |
1372 | struct stat st; | |
1373 | BDRVRawState *s = bs->opaque; | |
1374 | ||
1375 | if (fstat(s->fd, &st) < 0) { | |
1376 | return -errno; | |
1377 | } | |
1378 | return (int64_t)st.st_blocks * 512; | |
1379 | } | |
1380 | ||
6f482f74 | 1381 | static int raw_create(const char *filename, QemuOpts *opts, Error **errp) |
83f64091 FB |
1382 | { |
1383 | int fd; | |
1e37d059 | 1384 | int result = 0; |
0e7e1989 | 1385 | int64_t total_size = 0; |
4ab15590 | 1386 | bool nocow = false; |
06247428 HT |
1387 | PreallocMode prealloc; |
1388 | char *buf = NULL; | |
1389 | Error *local_err = NULL; | |
83f64091 | 1390 | |
464d9f64 HR |
1391 | strstart(filename, "file:", &filename); |
1392 | ||
0e7e1989 | 1393 | /* Read out options */ |
180e9526 HT |
1394 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
1395 | BDRV_SECTOR_SIZE); | |
4ab15590 | 1396 | nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false); |
06247428 HT |
1397 | buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC); |
1398 | prealloc = qapi_enum_parse(PreallocMode_lookup, buf, | |
1399 | PREALLOC_MODE_MAX, PREALLOC_MODE_OFF, | |
1400 | &local_err); | |
1401 | g_free(buf); | |
1402 | if (local_err) { | |
1403 | error_propagate(errp, local_err); | |
1404 | result = -EINVAL; | |
1405 | goto out; | |
1406 | } | |
83f64091 | 1407 | |
6165f4d8 CB |
1408 | fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
1409 | 0644); | |
1e37d059 SW |
1410 | if (fd < 0) { |
1411 | result = -errno; | |
e428e439 | 1412 | error_setg_errno(errp, -result, "Could not create file"); |
06247428 HT |
1413 | goto out; |
1414 | } | |
1415 | ||
1416 | if (nocow) { | |
4ab15590 | 1417 | #ifdef __linux__ |
06247428 HT |
1418 | /* Set NOCOW flag to solve performance issue on fs like btrfs. |
1419 | * This is an optimisation. The FS_IOC_SETFLAGS ioctl return value | |
1420 | * will be ignored since any failure of this operation should not | |
1421 | * block the left work. | |
1422 | */ | |
1423 | int attr; | |
1424 | if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0) { | |
1425 | attr |= FS_NOCOW_FL; | |
1426 | ioctl(fd, FS_IOC_SETFLAGS, &attr); | |
4ab15590 | 1427 | } |
06247428 HT |
1428 | #endif |
1429 | } | |
1430 | ||
1431 | if (ftruncate(fd, total_size) != 0) { | |
1432 | result = -errno; | |
1433 | error_setg_errno(errp, -result, "Could not resize file"); | |
1434 | goto out_close; | |
1435 | } | |
4ab15590 | 1436 | |
ed911435 KW |
1437 | switch (prealloc) { |
1438 | #ifdef CONFIG_POSIX_FALLOCATE | |
1439 | case PREALLOC_MODE_FALLOC: | |
06247428 HT |
1440 | /* posix_fallocate() doesn't set errno. */ |
1441 | result = -posix_fallocate(fd, 0, total_size); | |
1442 | if (result != 0) { | |
1443 | error_setg_errno(errp, -result, | |
1444 | "Could not preallocate data for the new file"); | |
1e37d059 | 1445 | } |
ed911435 KW |
1446 | break; |
1447 | #endif | |
1448 | case PREALLOC_MODE_FULL: | |
1449 | { | |
06247428 | 1450 | int64_t num = 0, left = total_size; |
ed911435 | 1451 | buf = g_malloc0(65536); |
06247428 HT |
1452 | |
1453 | while (left > 0) { | |
1454 | num = MIN(left, 65536); | |
1455 | result = write(fd, buf, num); | |
1456 | if (result < 0) { | |
1457 | result = -errno; | |
1458 | error_setg_errno(errp, -result, | |
1459 | "Could not write to the new file"); | |
1460 | break; | |
1461 | } | |
39411cf3 | 1462 | left -= result; |
1e37d059 | 1463 | } |
731de380 | 1464 | if (result >= 0) { |
098ffa66 HR |
1465 | result = fsync(fd); |
1466 | if (result < 0) { | |
1467 | result = -errno; | |
1468 | error_setg_errno(errp, -result, | |
1469 | "Could not flush new file to disk"); | |
1470 | } | |
731de380 | 1471 | } |
06247428 | 1472 | g_free(buf); |
ed911435 KW |
1473 | break; |
1474 | } | |
1475 | case PREALLOC_MODE_OFF: | |
1476 | break; | |
1477 | default: | |
06247428 HT |
1478 | result = -EINVAL; |
1479 | error_setg(errp, "Unsupported preallocation mode: %s", | |
1480 | PreallocMode_lookup[prealloc]); | |
ed911435 | 1481 | break; |
1e37d059 | 1482 | } |
06247428 HT |
1483 | |
1484 | out_close: | |
1485 | if (qemu_close(fd) != 0 && result == 0) { | |
1486 | result = -errno; | |
1487 | error_setg_errno(errp, -result, "Could not close the new file"); | |
1488 | } | |
1489 | out: | |
1e37d059 | 1490 | return result; |
83f64091 FB |
1491 | } |
1492 | ||
d1f06fe6 MA |
1493 | /* |
1494 | * Find allocation range in @bs around offset @start. | |
1495 | * May change underlying file descriptor's file offset. | |
1496 | * If @start is not in a hole, store @start in @data, and the | |
1497 | * beginning of the next hole in @hole, and return 0. | |
1498 | * If @start is in a non-trailing hole, store @start in @hole and the | |
1499 | * beginning of the next non-hole in @data, and return 0. | |
1500 | * If @start is in a trailing hole or beyond EOF, return -ENXIO. | |
1501 | * If we can't find out, return a negative errno other than -ENXIO. | |
1502 | */ | |
1503 | static int find_allocation(BlockDriverState *bs, off_t start, | |
1504 | off_t *data, off_t *hole) | |
4f11aa8a HR |
1505 | { |
1506 | #if defined SEEK_HOLE && defined SEEK_DATA | |
94282e71 | 1507 | BDRVRawState *s = bs->opaque; |
d1f06fe6 | 1508 | off_t offs; |
94282e71 | 1509 | |
d1f06fe6 MA |
1510 | /* |
1511 | * SEEK_DATA cases: | |
1512 | * D1. offs == start: start is in data | |
1513 | * D2. offs > start: start is in a hole, next data at offs | |
1514 | * D3. offs < 0, errno = ENXIO: either start is in a trailing hole | |
1515 | * or start is beyond EOF | |
1516 | * If the latter happens, the file has been truncated behind | |
1517 | * our back since we opened it. All bets are off then. | |
1518 | * Treating like a trailing hole is simplest. | |
1519 | * D4. offs < 0, errno != ENXIO: we learned nothing | |
1520 | */ | |
1521 | offs = lseek(s->fd, start, SEEK_DATA); | |
1522 | if (offs < 0) { | |
1523 | return -errno; /* D3 or D4 */ | |
1524 | } | |
1525 | assert(offs >= start); | |
1526 | ||
1527 | if (offs > start) { | |
1528 | /* D2: in hole, next data at offs */ | |
1529 | *hole = start; | |
1530 | *data = offs; | |
1531 | return 0; | |
5500316d PB |
1532 | } |
1533 | ||
d1f06fe6 MA |
1534 | /* D1: in data, end not yet known */ |
1535 | ||
1536 | /* | |
1537 | * SEEK_HOLE cases: | |
1538 | * H1. offs == start: start is in a hole | |
1539 | * If this happens here, a hole has been dug behind our back | |
1540 | * since the previous lseek(). | |
1541 | * H2. offs > start: either start is in data, next hole at offs, | |
1542 | * or start is in trailing hole, EOF at offs | |
1543 | * Linux treats trailing holes like any other hole: offs == | |
1544 | * start. Solaris seeks to EOF instead: offs > start (blech). | |
1545 | * If that happens here, a hole has been dug behind our back | |
1546 | * since the previous lseek(). | |
1547 | * H3. offs < 0, errno = ENXIO: start is beyond EOF | |
1548 | * If this happens, the file has been truncated behind our | |
1549 | * back since we opened it. Treat it like a trailing hole. | |
1550 | * H4. offs < 0, errno != ENXIO: we learned nothing | |
1551 | * Pretend we know nothing at all, i.e. "forget" about D1. | |
1552 | */ | |
1553 | offs = lseek(s->fd, start, SEEK_HOLE); | |
1554 | if (offs < 0) { | |
1555 | return -errno; /* D1 and (H3 or H4) */ | |
1556 | } | |
1557 | assert(offs >= start); | |
1558 | ||
1559 | if (offs > start) { | |
1560 | /* | |
1561 | * D1 and H2: either in data, next hole at offs, or it was in | |
1562 | * data but is now in a trailing hole. In the latter case, | |
1563 | * all bets are off. Treating it as if it there was data all | |
1564 | * the way to EOF is safe, so simply do that. | |
1565 | */ | |
4f11aa8a | 1566 | *data = start; |
d1f06fe6 MA |
1567 | *hole = offs; |
1568 | return 0; | |
5500316d | 1569 | } |
4f11aa8a | 1570 | |
d1f06fe6 MA |
1571 | /* D1 and H1 */ |
1572 | return -EBUSY; | |
5500316d | 1573 | #else |
4f11aa8a | 1574 | return -ENOTSUP; |
5500316d | 1575 | #endif |
4f11aa8a HR |
1576 | } |
1577 | ||
1578 | /* | |
be2ebc6d | 1579 | * Returns the allocation status of the specified sectors. |
4f11aa8a HR |
1580 | * |
1581 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
1582 | * and 'pnum' is set to 0. | |
1583 | * | |
1584 | * 'pnum' is set to the number of sectors (including and immediately following | |
1585 | * the specified sector) that are known to be in the same | |
1586 | * allocated/unallocated state. | |
1587 | * | |
1588 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
1589 | * beyond the end of the disk image it will be clamped. | |
1590 | */ | |
1591 | static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, | |
1592 | int64_t sector_num, | |
1593 | int nb_sectors, int *pnum) | |
1594 | { | |
1595 | off_t start, data = 0, hole = 0; | |
e6d7ec32 | 1596 | int64_t total_size; |
d7f62751 | 1597 | int ret; |
4f11aa8a HR |
1598 | |
1599 | ret = fd_open(bs); | |
1600 | if (ret < 0) { | |
1601 | return ret; | |
1602 | } | |
1603 | ||
1604 | start = sector_num * BDRV_SECTOR_SIZE; | |
e6d7ec32 HR |
1605 | total_size = bdrv_getlength(bs); |
1606 | if (total_size < 0) { | |
1607 | return total_size; | |
1608 | } else if (start >= total_size) { | |
1609 | *pnum = 0; | |
1610 | return 0; | |
1611 | } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) { | |
1612 | nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE); | |
1613 | } | |
4f11aa8a | 1614 | |
d1f06fe6 MA |
1615 | ret = find_allocation(bs, start, &data, &hole); |
1616 | if (ret == -ENXIO) { | |
1617 | /* Trailing hole */ | |
1618 | *pnum = nb_sectors; | |
1619 | ret = BDRV_BLOCK_ZERO; | |
1620 | } else if (ret < 0) { | |
1621 | /* No info available, so pretend there are no holes */ | |
1622 | *pnum = nb_sectors; | |
1623 | ret = BDRV_BLOCK_DATA; | |
1624 | } else if (data == start) { | |
5500316d PB |
1625 | /* On a data extent, compute sectors to the end of the extent. */ |
1626 | *pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); | |
d1f06fe6 | 1627 | ret = BDRV_BLOCK_DATA; |
5500316d PB |
1628 | } else { |
1629 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
d1f06fe6 | 1630 | assert(hole == start); |
5500316d | 1631 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); |
d1f06fe6 | 1632 | ret = BDRV_BLOCK_ZERO; |
5500316d | 1633 | } |
d1f06fe6 | 1634 | return ret | BDRV_BLOCK_OFFSET_VALID | start; |
5500316d PB |
1635 | } |
1636 | ||
7c84b1b8 | 1637 | static coroutine_fn BlockAIOCB *raw_aio_discard(BlockDriverState *bs, |
8238010b | 1638 | int64_t sector_num, int nb_sectors, |
097310b5 | 1639 | BlockCompletionFunc *cb, void *opaque) |
dce512de | 1640 | { |
dce512de CH |
1641 | BDRVRawState *s = bs->opaque; |
1642 | ||
8238010b PB |
1643 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, |
1644 | cb, opaque, QEMU_AIO_DISCARD); | |
dce512de | 1645 | } |
0e7e1989 | 1646 | |
260a82e5 PB |
1647 | static int coroutine_fn raw_co_write_zeroes( |
1648 | BlockDriverState *bs, int64_t sector_num, | |
1649 | int nb_sectors, BdrvRequestFlags flags) | |
1650 | { | |
1651 | BDRVRawState *s = bs->opaque; | |
1652 | ||
1653 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1654 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1655 | QEMU_AIO_WRITE_ZEROES); | |
1656 | } else if (s->discard_zeroes) { | |
1657 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1658 | QEMU_AIO_DISCARD); | |
260a82e5 | 1659 | } |
97a2ae34 | 1660 | return -ENOTSUP; |
260a82e5 PB |
1661 | } |
1662 | ||
1663 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
1664 | { | |
1665 | BDRVRawState *s = bs->opaque; | |
1666 | ||
1667 | bdi->unallocated_blocks_are_zero = s->discard_zeroes; | |
1668 | bdi->can_write_zeroes_with_unmap = s->discard_zeroes; | |
1669 | return 0; | |
1670 | } | |
1671 | ||
6f482f74 CL |
1672 | static QemuOptsList raw_create_opts = { |
1673 | .name = "raw-create-opts", | |
1674 | .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), | |
1675 | .desc = { | |
1676 | { | |
1677 | .name = BLOCK_OPT_SIZE, | |
1678 | .type = QEMU_OPT_SIZE, | |
1679 | .help = "Virtual disk size" | |
1680 | }, | |
4ab15590 CL |
1681 | { |
1682 | .name = BLOCK_OPT_NOCOW, | |
1683 | .type = QEMU_OPT_BOOL, | |
1684 | .help = "Turn off copy-on-write (valid only on btrfs)" | |
1685 | }, | |
06247428 HT |
1686 | { |
1687 | .name = BLOCK_OPT_PREALLOC, | |
1688 | .type = QEMU_OPT_STRING, | |
1689 | .help = "Preallocation mode (allowed values: off, falloc, full)" | |
1690 | }, | |
6f482f74 CL |
1691 | { /* end of list */ } |
1692 | } | |
0e7e1989 KW |
1693 | }; |
1694 | ||
5f535a94 | 1695 | BlockDriver bdrv_file = { |
84a12e66 CH |
1696 | .format_name = "file", |
1697 | .protocol_name = "file", | |
856ae5c3 | 1698 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1699 | .bdrv_needs_filename = true, |
856ae5c3 | 1700 | .bdrv_probe = NULL, /* no probe for protocols */ |
078896a9 | 1701 | .bdrv_parse_filename = raw_parse_filename, |
66f82cee | 1702 | .bdrv_file_open = raw_open, |
eeb6b45d JC |
1703 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1704 | .bdrv_reopen_commit = raw_reopen_commit, | |
1705 | .bdrv_reopen_abort = raw_reopen_abort, | |
856ae5c3 | 1706 | .bdrv_close = raw_close, |
c282e1fd | 1707 | .bdrv_create = raw_create, |
3ac21627 | 1708 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
b6b8a333 | 1709 | .bdrv_co_get_block_status = raw_co_get_block_status, |
260a82e5 | 1710 | .bdrv_co_write_zeroes = raw_co_write_zeroes, |
3b46e624 | 1711 | |
f141eafe AL |
1712 | .bdrv_aio_readv = raw_aio_readv, |
1713 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1714 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 1715 | .bdrv_aio_discard = raw_aio_discard, |
c25f53b0 | 1716 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
1717 | .bdrv_io_plug = raw_aio_plug, |
1718 | .bdrv_io_unplug = raw_aio_unplug, | |
1719 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
3c529d93 | 1720 | |
83f64091 FB |
1721 | .bdrv_truncate = raw_truncate, |
1722 | .bdrv_getlength = raw_getlength, | |
260a82e5 | 1723 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1724 | .bdrv_get_allocated_file_size |
1725 | = raw_get_allocated_file_size, | |
0e7e1989 | 1726 | |
c2f3426c SH |
1727 | .bdrv_detach_aio_context = raw_detach_aio_context, |
1728 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
1729 | ||
6f482f74 | 1730 | .create_opts = &raw_create_opts, |
83f64091 FB |
1731 | }; |
1732 | ||
19cb3738 FB |
1733 | /***********************************************/ |
1734 | /* host device */ | |
1735 | ||
83affaa6 | 1736 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1737 | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); |
1738 | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); | |
1739 | ||
1740 | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) | |
1741 | { | |
5fafdf24 | 1742 | kern_return_t kernResult; |
19cb3738 FB |
1743 | mach_port_t masterPort; |
1744 | CFMutableDictionaryRef classesToMatch; | |
1745 | ||
1746 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
1747 | if ( KERN_SUCCESS != kernResult ) { | |
1748 | printf( "IOMasterPort returned %d\n", kernResult ); | |
1749 | } | |
3b46e624 | 1750 | |
5fafdf24 | 1751 | classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
19cb3738 FB |
1752 | if ( classesToMatch == NULL ) { |
1753 | printf( "IOServiceMatching returned a NULL dictionary.\n" ); | |
1754 | } else { | |
1755 | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); | |
1756 | } | |
1757 | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); | |
1758 | if ( KERN_SUCCESS != kernResult ) | |
1759 | { | |
1760 | printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); | |
1761 | } | |
3b46e624 | 1762 | |
19cb3738 FB |
1763 | return kernResult; |
1764 | } | |
1765 | ||
1766 | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) | |
1767 | { | |
1768 | io_object_t nextMedia; | |
1769 | kern_return_t kernResult = KERN_FAILURE; | |
1770 | *bsdPath = '\0'; | |
1771 | nextMedia = IOIteratorNext( mediaIterator ); | |
1772 | if ( nextMedia ) | |
1773 | { | |
1774 | CFTypeRef bsdPathAsCFString; | |
1775 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
1776 | if ( bsdPathAsCFString ) { | |
1777 | size_t devPathLength; | |
1778 | strcpy( bsdPath, _PATH_DEV ); | |
1779 | strcat( bsdPath, "r" ); | |
1780 | devPathLength = strlen( bsdPath ); | |
1781 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
1782 | kernResult = KERN_SUCCESS; | |
1783 | } | |
1784 | CFRelease( bsdPathAsCFString ); | |
1785 | } | |
1786 | IOObjectRelease( nextMedia ); | |
1787 | } | |
3b46e624 | 1788 | |
19cb3738 FB |
1789 | return kernResult; |
1790 | } | |
1791 | ||
1792 | #endif | |
1793 | ||
508c7cb3 CH |
1794 | static int hdev_probe_device(const char *filename) |
1795 | { | |
1796 | struct stat st; | |
1797 | ||
1798 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
1799 | if (strstart(filename, "/dev/cdrom", NULL)) | |
1800 | return 50; | |
1801 | ||
1802 | if (stat(filename, &st) >= 0 && | |
1803 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
1804 | return 100; | |
1805 | } | |
1806 | ||
1807 | return 0; | |
1808 | } | |
1809 | ||
da888d37 SH |
1810 | static int check_hdev_writable(BDRVRawState *s) |
1811 | { | |
1812 | #if defined(BLKROGET) | |
1813 | /* Linux block devices can be configured "read-only" using blockdev(8). | |
1814 | * This is independent of device node permissions and therefore open(2) | |
1815 | * with O_RDWR succeeds. Actual writes fail with EPERM. | |
1816 | * | |
1817 | * bdrv_open() is supposed to fail if the disk is read-only. Explicitly | |
1818 | * check for read-only block devices so that Linux block devices behave | |
1819 | * properly. | |
1820 | */ | |
1821 | struct stat st; | |
1822 | int readonly = 0; | |
1823 | ||
1824 | if (fstat(s->fd, &st)) { | |
1825 | return -errno; | |
1826 | } | |
1827 | ||
1828 | if (!S_ISBLK(st.st_mode)) { | |
1829 | return 0; | |
1830 | } | |
1831 | ||
1832 | if (ioctl(s->fd, BLKROGET, &readonly) < 0) { | |
1833 | return -errno; | |
1834 | } | |
1835 | ||
1836 | if (readonly) { | |
1837 | return -EACCES; | |
1838 | } | |
1839 | #endif /* defined(BLKROGET) */ | |
1840 | return 0; | |
1841 | } | |
1842 | ||
7af803d4 HR |
1843 | static void hdev_parse_filename(const char *filename, QDict *options, |
1844 | Error **errp) | |
1845 | { | |
1846 | /* The prefix is optional, just as for "file". */ | |
1847 | strstart(filename, "host_device:", &filename); | |
1848 | ||
1849 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
1850 | } | |
1851 | ||
015a1036 HR |
1852 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
1853 | Error **errp) | |
19cb3738 FB |
1854 | { |
1855 | BDRVRawState *s = bs->opaque; | |
e428e439 | 1856 | Error *local_err = NULL; |
da888d37 | 1857 | int ret; |
c66a6157 | 1858 | const char *filename = qdict_get_str(options, "filename"); |
a76bab49 | 1859 | |
83affaa6 | 1860 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1861 | if (strstart(filename, "/dev/cdrom", NULL)) { |
1862 | kern_return_t kernResult; | |
1863 | io_iterator_t mediaIterator; | |
1864 | char bsdPath[ MAXPATHLEN ]; | |
1865 | int fd; | |
5fafdf24 | 1866 | |
19cb3738 FB |
1867 | kernResult = FindEjectableCDMedia( &mediaIterator ); |
1868 | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); | |
3b46e624 | 1869 | |
19cb3738 FB |
1870 | if ( bsdPath[ 0 ] != '\0' ) { |
1871 | strcat(bsdPath,"s0"); | |
1872 | /* some CDs don't have a partition 0 */ | |
6165f4d8 | 1873 | fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
19cb3738 FB |
1874 | if (fd < 0) { |
1875 | bsdPath[strlen(bsdPath)-1] = '1'; | |
1876 | } else { | |
2e1e79da | 1877 | qemu_close(fd); |
19cb3738 FB |
1878 | } |
1879 | filename = bsdPath; | |
a5c5ea3f | 1880 | qdict_put(options, "filename", qstring_from_str(filename)); |
19cb3738 | 1881 | } |
3b46e624 | 1882 | |
19cb3738 FB |
1883 | if ( mediaIterator ) |
1884 | IOObjectRelease( mediaIterator ); | |
1885 | } | |
1886 | #endif | |
19cb3738 FB |
1887 | |
1888 | s->type = FTYPE_FILE; | |
4dd75c70 | 1889 | #if defined(__linux__) |
05acda4d BK |
1890 | { |
1891 | char resolved_path[ MAXPATHLEN ], *temp; | |
1892 | ||
1893 | temp = realpath(filename, resolved_path); | |
1894 | if (temp && strstart(temp, "/dev/sg", NULL)) { | |
1895 | bs->sg = 1; | |
1896 | } | |
19cb3738 FB |
1897 | } |
1898 | #endif | |
90babde0 | 1899 | |
e428e439 | 1900 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
da888d37 | 1901 | if (ret < 0) { |
84d18f06 | 1902 | if (local_err) { |
e428e439 HR |
1903 | error_propagate(errp, local_err); |
1904 | } | |
da888d37 SH |
1905 | return ret; |
1906 | } | |
1907 | ||
1908 | if (flags & BDRV_O_RDWR) { | |
1909 | ret = check_hdev_writable(s); | |
1910 | if (ret < 0) { | |
1911 | raw_close(bs); | |
e428e439 | 1912 | error_setg_errno(errp, -ret, "The device is not writable"); |
da888d37 SH |
1913 | return ret; |
1914 | } | |
1915 | } | |
1916 | ||
1917 | return ret; | |
19cb3738 FB |
1918 | } |
1919 | ||
03ff3ca3 | 1920 | #if defined(__linux__) |
19cb3738 FB |
1921 | /* Note: we do not have a reliable method to detect if the floppy is |
1922 | present. The current method is to try to open the floppy at every | |
1923 | I/O and to keep it opened during a few hundreds of ms. */ | |
1924 | static int fd_open(BlockDriverState *bs) | |
1925 | { | |
1926 | BDRVRawState *s = bs->opaque; | |
1927 | int last_media_present; | |
1928 | ||
1929 | if (s->type != FTYPE_FD) | |
1930 | return 0; | |
1931 | last_media_present = (s->fd >= 0); | |
5fafdf24 | 1932 | if (s->fd >= 0 && |
a56ebc6b | 1933 | (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
2e1e79da | 1934 | qemu_close(s->fd); |
19cb3738 FB |
1935 | s->fd = -1; |
1936 | #ifdef DEBUG_FLOPPY | |
1937 | printf("Floppy closed\n"); | |
1938 | #endif | |
1939 | } | |
1940 | if (s->fd < 0) { | |
5fafdf24 | 1941 | if (s->fd_got_error && |
a56ebc6b | 1942 | (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
19cb3738 FB |
1943 | #ifdef DEBUG_FLOPPY |
1944 | printf("No floppy (open delayed)\n"); | |
1945 | #endif | |
1946 | return -EIO; | |
1947 | } | |
6165f4d8 | 1948 | s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK); |
19cb3738 | 1949 | if (s->fd < 0) { |
a56ebc6b | 1950 | s->fd_error_time = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); |
19cb3738 FB |
1951 | s->fd_got_error = 1; |
1952 | if (last_media_present) | |
1953 | s->fd_media_changed = 1; | |
1954 | #ifdef DEBUG_FLOPPY | |
1955 | printf("No floppy\n"); | |
1956 | #endif | |
1957 | return -EIO; | |
1958 | } | |
1959 | #ifdef DEBUG_FLOPPY | |
1960 | printf("Floppy opened\n"); | |
1961 | #endif | |
1962 | } | |
1963 | if (!last_media_present) | |
1964 | s->fd_media_changed = 1; | |
a56ebc6b | 1965 | s->fd_open_time = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); |
19cb3738 FB |
1966 | s->fd_got_error = 0; |
1967 | return 0; | |
1968 | } | |
19cb3738 | 1969 | |
63ec93db | 1970 | static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
985a03b0 TS |
1971 | { |
1972 | BDRVRawState *s = bs->opaque; | |
1973 | ||
1974 | return ioctl(s->fd, req, buf); | |
1975 | } | |
221f715d | 1976 | |
7c84b1b8 | 1977 | static BlockAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
221f715d | 1978 | unsigned long int req, void *buf, |
097310b5 | 1979 | BlockCompletionFunc *cb, void *opaque) |
221f715d | 1980 | { |
f141eafe | 1981 | BDRVRawState *s = bs->opaque; |
c208e8c2 | 1982 | RawPosixAIOData *acb; |
c4d9d196 | 1983 | ThreadPool *pool; |
221f715d | 1984 | |
f141eafe AL |
1985 | if (fd_open(bs) < 0) |
1986 | return NULL; | |
c208e8c2 PB |
1987 | |
1988 | acb = g_slice_new(RawPosixAIOData); | |
1989 | acb->bs = bs; | |
1990 | acb->aio_type = QEMU_AIO_IOCTL; | |
1991 | acb->aio_fildes = s->fd; | |
1992 | acb->aio_offset = 0; | |
1993 | acb->aio_ioctl_buf = buf; | |
1994 | acb->aio_ioctl_cmd = req; | |
c4d9d196 SH |
1995 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1996 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
221f715d AL |
1997 | } |
1998 | ||
a167ba50 | 1999 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
2000 | static int fd_open(BlockDriverState *bs) |
2001 | { | |
2002 | BDRVRawState *s = bs->opaque; | |
2003 | ||
2004 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
2005 | if (s->fd >= 0) | |
2006 | return 0; | |
2007 | return -EIO; | |
2008 | } | |
9f23011a | 2009 | #else /* !linux && !FreeBSD */ |
19cb3738 | 2010 | |
08af02e2 AL |
2011 | static int fd_open(BlockDriverState *bs) |
2012 | { | |
2013 | return 0; | |
2014 | } | |
2015 | ||
221f715d | 2016 | #endif /* !linux && !FreeBSD */ |
04eeb8b6 | 2017 | |
7c84b1b8 | 2018 | static coroutine_fn BlockAIOCB *hdev_aio_discard(BlockDriverState *bs, |
c36dd8a0 | 2019 | int64_t sector_num, int nb_sectors, |
097310b5 | 2020 | BlockCompletionFunc *cb, void *opaque) |
c36dd8a0 AF |
2021 | { |
2022 | BDRVRawState *s = bs->opaque; | |
2023 | ||
2024 | if (fd_open(bs) < 0) { | |
2025 | return NULL; | |
2026 | } | |
2027 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, | |
2028 | cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
2029 | } | |
2030 | ||
d0b4503e PB |
2031 | static coroutine_fn int hdev_co_write_zeroes(BlockDriverState *bs, |
2032 | int64_t sector_num, int nb_sectors, BdrvRequestFlags flags) | |
2033 | { | |
2034 | BDRVRawState *s = bs->opaque; | |
2035 | int rc; | |
2036 | ||
2037 | rc = fd_open(bs); | |
2038 | if (rc < 0) { | |
2039 | return rc; | |
2040 | } | |
2041 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
2042 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
2043 | QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV); | |
2044 | } else if (s->discard_zeroes) { | |
2045 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
2046 | QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
d0b4503e | 2047 | } |
97a2ae34 | 2048 | return -ENOTSUP; |
d0b4503e PB |
2049 | } |
2050 | ||
6f482f74 | 2051 | static int hdev_create(const char *filename, QemuOpts *opts, |
d5124c00 | 2052 | Error **errp) |
93c65b47 AL |
2053 | { |
2054 | int fd; | |
2055 | int ret = 0; | |
2056 | struct stat stat_buf; | |
0e7e1989 | 2057 | int64_t total_size = 0; |
cc28c6aa HR |
2058 | bool has_prefix; |
2059 | ||
2060 | /* This function is used by all three protocol block drivers and therefore | |
2061 | * any of these three prefixes may be given. | |
2062 | * The return value has to be stored somewhere, otherwise this is an error | |
2063 | * due to -Werror=unused-value. */ | |
2064 | has_prefix = | |
2065 | strstart(filename, "host_device:", &filename) || | |
2066 | strstart(filename, "host_cdrom:" , &filename) || | |
2067 | strstart(filename, "host_floppy:", &filename); | |
2068 | ||
2069 | (void)has_prefix; | |
93c65b47 | 2070 | |
0e7e1989 | 2071 | /* Read out options */ |
180e9526 HT |
2072 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
2073 | BDRV_SECTOR_SIZE); | |
93c65b47 | 2074 | |
6165f4d8 | 2075 | fd = qemu_open(filename, O_WRONLY | O_BINARY); |
e428e439 HR |
2076 | if (fd < 0) { |
2077 | ret = -errno; | |
2078 | error_setg_errno(errp, -ret, "Could not open device"); | |
2079 | return ret; | |
2080 | } | |
93c65b47 | 2081 | |
e428e439 | 2082 | if (fstat(fd, &stat_buf) < 0) { |
57e69b7d | 2083 | ret = -errno; |
e428e439 HR |
2084 | error_setg_errno(errp, -ret, "Could not stat device"); |
2085 | } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) { | |
2086 | error_setg(errp, | |
2087 | "The given file is neither a block nor a character device"); | |
57e69b7d | 2088 | ret = -ENODEV; |
180e9526 | 2089 | } else if (lseek(fd, 0, SEEK_END) < total_size) { |
e428e439 | 2090 | error_setg(errp, "Device is too small"); |
93c65b47 | 2091 | ret = -ENOSPC; |
e428e439 | 2092 | } |
93c65b47 | 2093 | |
2e1e79da | 2094 | qemu_close(fd); |
93c65b47 AL |
2095 | return ret; |
2096 | } | |
2097 | ||
5efa9d5a | 2098 | static BlockDriver bdrv_host_device = { |
0b4ce02e | 2099 | .format_name = "host_device", |
84a12e66 | 2100 | .protocol_name = "host_device", |
0b4ce02e | 2101 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2102 | .bdrv_needs_filename = true, |
0b4ce02e | 2103 | .bdrv_probe_device = hdev_probe_device, |
7af803d4 | 2104 | .bdrv_parse_filename = hdev_parse_filename, |
66f82cee | 2105 | .bdrv_file_open = hdev_open, |
0b4ce02e | 2106 | .bdrv_close = raw_close, |
1bc6b705 JC |
2107 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2108 | .bdrv_reopen_commit = raw_reopen_commit, | |
2109 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2110 | .bdrv_create = hdev_create, |
6f482f74 | 2111 | .create_opts = &raw_create_opts, |
d0b4503e | 2112 | .bdrv_co_write_zeroes = hdev_co_write_zeroes, |
3b46e624 | 2113 | |
f141eafe AL |
2114 | .bdrv_aio_readv = raw_aio_readv, |
2115 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2116 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 2117 | .bdrv_aio_discard = hdev_aio_discard, |
c25f53b0 | 2118 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2119 | .bdrv_io_plug = raw_aio_plug, |
2120 | .bdrv_io_unplug = raw_aio_unplug, | |
2121 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
3c529d93 | 2122 | |
55b949c8 | 2123 | .bdrv_truncate = raw_truncate, |
e60f469c | 2124 | .bdrv_getlength = raw_getlength, |
260a82e5 | 2125 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
2126 | .bdrv_get_allocated_file_size |
2127 | = raw_get_allocated_file_size, | |
19cb3738 | 2128 | |
c2f3426c SH |
2129 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2130 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2131 | ||
f3a5d3f8 | 2132 | /* generic scsi device */ |
63ec93db CH |
2133 | #ifdef __linux__ |
2134 | .bdrv_ioctl = hdev_ioctl, | |
63ec93db CH |
2135 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
2136 | #endif | |
f3a5d3f8 CH |
2137 | }; |
2138 | ||
2139 | #ifdef __linux__ | |
d3f49845 HR |
2140 | static void floppy_parse_filename(const char *filename, QDict *options, |
2141 | Error **errp) | |
2142 | { | |
2143 | /* The prefix is optional, just as for "file". */ | |
2144 | strstart(filename, "host_floppy:", &filename); | |
2145 | ||
2146 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
2147 | } | |
2148 | ||
015a1036 HR |
2149 | static int floppy_open(BlockDriverState *bs, QDict *options, int flags, |
2150 | Error **errp) | |
f3a5d3f8 CH |
2151 | { |
2152 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2153 | Error *local_err = NULL; |
f3a5d3f8 CH |
2154 | int ret; |
2155 | ||
f3a5d3f8 | 2156 | s->type = FTYPE_FD; |
f3a5d3f8 | 2157 | |
19a3da7f | 2158 | /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ |
e428e439 HR |
2159 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
2160 | if (ret) { | |
84d18f06 | 2161 | if (local_err) { |
e428e439 HR |
2162 | error_propagate(errp, local_err); |
2163 | } | |
f3a5d3f8 | 2164 | return ret; |
e428e439 | 2165 | } |
f3a5d3f8 CH |
2166 | |
2167 | /* close fd so that we can reopen it as needed */ | |
2e1e79da | 2168 | qemu_close(s->fd); |
f3a5d3f8 CH |
2169 | s->fd = -1; |
2170 | s->fd_media_changed = 1; | |
2171 | ||
2172 | return 0; | |
2173 | } | |
2174 | ||
508c7cb3 CH |
2175 | static int floppy_probe_device(const char *filename) |
2176 | { | |
2ebf7c4b CR |
2177 | int fd, ret; |
2178 | int prio = 0; | |
2179 | struct floppy_struct fdparam; | |
343f8568 | 2180 | struct stat st; |
2ebf7c4b | 2181 | |
e1740828 CB |
2182 | if (strstart(filename, "/dev/fd", NULL) && |
2183 | !strstart(filename, "/dev/fdset/", NULL)) { | |
2ebf7c4b | 2184 | prio = 50; |
e1740828 | 2185 | } |
2ebf7c4b | 2186 | |
6165f4d8 | 2187 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
2ebf7c4b CR |
2188 | if (fd < 0) { |
2189 | goto out; | |
2190 | } | |
343f8568 JS |
2191 | ret = fstat(fd, &st); |
2192 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
2193 | goto outc; | |
2194 | } | |
2ebf7c4b CR |
2195 | |
2196 | /* Attempt to detect via a floppy specific ioctl */ | |
2197 | ret = ioctl(fd, FDGETPRM, &fdparam); | |
2198 | if (ret >= 0) | |
2199 | prio = 100; | |
2200 | ||
343f8568 | 2201 | outc: |
2e1e79da | 2202 | qemu_close(fd); |
2ebf7c4b CR |
2203 | out: |
2204 | return prio; | |
508c7cb3 CH |
2205 | } |
2206 | ||
2207 | ||
f3a5d3f8 CH |
2208 | static int floppy_is_inserted(BlockDriverState *bs) |
2209 | { | |
2210 | return fd_open(bs) >= 0; | |
2211 | } | |
2212 | ||
2213 | static int floppy_media_changed(BlockDriverState *bs) | |
2214 | { | |
2215 | BDRVRawState *s = bs->opaque; | |
2216 | int ret; | |
2217 | ||
2218 | /* | |
2219 | * XXX: we do not have a true media changed indication. | |
2220 | * It does not work if the floppy is changed without trying to read it. | |
2221 | */ | |
2222 | fd_open(bs); | |
2223 | ret = s->fd_media_changed; | |
2224 | s->fd_media_changed = 0; | |
2225 | #ifdef DEBUG_FLOPPY | |
2226 | printf("Floppy changed=%d\n", ret); | |
2227 | #endif | |
2228 | return ret; | |
2229 | } | |
2230 | ||
f36f3949 | 2231 | static void floppy_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2232 | { |
2233 | BDRVRawState *s = bs->opaque; | |
2234 | int fd; | |
2235 | ||
2236 | if (s->fd >= 0) { | |
2e1e79da | 2237 | qemu_close(s->fd); |
f3a5d3f8 CH |
2238 | s->fd = -1; |
2239 | } | |
6165f4d8 | 2240 | fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK); |
f3a5d3f8 CH |
2241 | if (fd >= 0) { |
2242 | if (ioctl(fd, FDEJECT, 0) < 0) | |
2243 | perror("FDEJECT"); | |
2e1e79da | 2244 | qemu_close(fd); |
f3a5d3f8 | 2245 | } |
f3a5d3f8 CH |
2246 | } |
2247 | ||
2248 | static BlockDriver bdrv_host_floppy = { | |
2249 | .format_name = "host_floppy", | |
84a12e66 | 2250 | .protocol_name = "host_floppy", |
f3a5d3f8 | 2251 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2252 | .bdrv_needs_filename = true, |
508c7cb3 | 2253 | .bdrv_probe_device = floppy_probe_device, |
d3f49845 | 2254 | .bdrv_parse_filename = floppy_parse_filename, |
66f82cee | 2255 | .bdrv_file_open = floppy_open, |
f3a5d3f8 | 2256 | .bdrv_close = raw_close, |
1bc6b705 JC |
2257 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2258 | .bdrv_reopen_commit = raw_reopen_commit, | |
2259 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2260 | .bdrv_create = hdev_create, |
6f482f74 | 2261 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2262 | |
f3a5d3f8 CH |
2263 | .bdrv_aio_readv = raw_aio_readv, |
2264 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2265 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2266 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2267 | .bdrv_io_plug = raw_aio_plug, |
2268 | .bdrv_io_unplug = raw_aio_unplug, | |
2269 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
f3a5d3f8 | 2270 | |
55b949c8 | 2271 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2272 | .bdrv_getlength = raw_getlength, |
2273 | .has_variable_length = true, | |
4a1d5e1f FZ |
2274 | .bdrv_get_allocated_file_size |
2275 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2276 | |
c2f3426c SH |
2277 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2278 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2279 | ||
f3a5d3f8 CH |
2280 | /* removable device support */ |
2281 | .bdrv_is_inserted = floppy_is_inserted, | |
2282 | .bdrv_media_changed = floppy_media_changed, | |
2283 | .bdrv_eject = floppy_eject, | |
f3a5d3f8 | 2284 | }; |
18fa1c42 | 2285 | #endif |
f3a5d3f8 | 2286 | |
18fa1c42 HR |
2287 | #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
2288 | static void cdrom_parse_filename(const char *filename, QDict *options, | |
2289 | Error **errp) | |
2290 | { | |
2291 | /* The prefix is optional, just as for "file". */ | |
2292 | strstart(filename, "host_cdrom:", &filename); | |
2293 | ||
2294 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
2295 | } | |
2296 | #endif | |
2297 | ||
2298 | #ifdef __linux__ | |
015a1036 HR |
2299 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2300 | Error **errp) | |
f3a5d3f8 CH |
2301 | { |
2302 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
2303 | Error *local_err = NULL; |
2304 | int ret; | |
f3a5d3f8 | 2305 | |
f3a5d3f8 CH |
2306 | s->type = FTYPE_CD; |
2307 | ||
19a3da7f | 2308 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
e428e439 | 2309 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
84d18f06 | 2310 | if (local_err) { |
e428e439 HR |
2311 | error_propagate(errp, local_err); |
2312 | } | |
2313 | return ret; | |
f3a5d3f8 CH |
2314 | } |
2315 | ||
508c7cb3 CH |
2316 | static int cdrom_probe_device(const char *filename) |
2317 | { | |
3baf720e CR |
2318 | int fd, ret; |
2319 | int prio = 0; | |
343f8568 | 2320 | struct stat st; |
3baf720e | 2321 | |
6165f4d8 | 2322 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
3baf720e CR |
2323 | if (fd < 0) { |
2324 | goto out; | |
2325 | } | |
343f8568 JS |
2326 | ret = fstat(fd, &st); |
2327 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
2328 | goto outc; | |
2329 | } | |
3baf720e CR |
2330 | |
2331 | /* Attempt to detect via a CDROM specific ioctl */ | |
2332 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2333 | if (ret >= 0) | |
2334 | prio = 100; | |
2335 | ||
343f8568 | 2336 | outc: |
2e1e79da | 2337 | qemu_close(fd); |
3baf720e CR |
2338 | out: |
2339 | return prio; | |
508c7cb3 CH |
2340 | } |
2341 | ||
f3a5d3f8 CH |
2342 | static int cdrom_is_inserted(BlockDriverState *bs) |
2343 | { | |
2344 | BDRVRawState *s = bs->opaque; | |
2345 | int ret; | |
2346 | ||
2347 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2348 | if (ret == CDS_DISC_OK) | |
2349 | return 1; | |
2350 | return 0; | |
2351 | } | |
2352 | ||
f36f3949 | 2353 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2354 | { |
2355 | BDRVRawState *s = bs->opaque; | |
2356 | ||
2357 | if (eject_flag) { | |
2358 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
2359 | perror("CDROMEJECT"); | |
2360 | } else { | |
2361 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
2362 | perror("CDROMEJECT"); | |
2363 | } | |
f3a5d3f8 CH |
2364 | } |
2365 | ||
025e849a | 2366 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2367 | { |
2368 | BDRVRawState *s = bs->opaque; | |
2369 | ||
2370 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
2371 | /* | |
2372 | * Note: an error can happen if the distribution automatically | |
2373 | * mounts the CD-ROM | |
2374 | */ | |
2375 | /* perror("CDROM_LOCKDOOR"); */ | |
2376 | } | |
f3a5d3f8 CH |
2377 | } |
2378 | ||
2379 | static BlockDriver bdrv_host_cdrom = { | |
2380 | .format_name = "host_cdrom", | |
84a12e66 | 2381 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2382 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2383 | .bdrv_needs_filename = true, |
508c7cb3 | 2384 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2385 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2386 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2387 | .bdrv_close = raw_close, |
1bc6b705 JC |
2388 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2389 | .bdrv_reopen_commit = raw_reopen_commit, | |
2390 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2391 | .bdrv_create = hdev_create, |
6f482f74 | 2392 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2393 | |
f3a5d3f8 CH |
2394 | .bdrv_aio_readv = raw_aio_readv, |
2395 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2396 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2397 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2398 | .bdrv_io_plug = raw_aio_plug, |
2399 | .bdrv_io_unplug = raw_aio_unplug, | |
2400 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
f3a5d3f8 | 2401 | |
55b949c8 | 2402 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2403 | .bdrv_getlength = raw_getlength, |
2404 | .has_variable_length = true, | |
4a1d5e1f FZ |
2405 | .bdrv_get_allocated_file_size |
2406 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2407 | |
c2f3426c SH |
2408 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2409 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2410 | ||
f3a5d3f8 CH |
2411 | /* removable device support */ |
2412 | .bdrv_is_inserted = cdrom_is_inserted, | |
2413 | .bdrv_eject = cdrom_eject, | |
025e849a | 2414 | .bdrv_lock_medium = cdrom_lock_medium, |
f3a5d3f8 CH |
2415 | |
2416 | /* generic scsi device */ | |
63ec93db | 2417 | .bdrv_ioctl = hdev_ioctl, |
63ec93db | 2418 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
f3a5d3f8 CH |
2419 | }; |
2420 | #endif /* __linux__ */ | |
2421 | ||
a167ba50 | 2422 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
511018e4 AT |
2423 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2424 | Error **errp) | |
f3a5d3f8 CH |
2425 | { |
2426 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2427 | Error *local_err = NULL; |
f3a5d3f8 CH |
2428 | int ret; |
2429 | ||
2430 | s->type = FTYPE_CD; | |
2431 | ||
e428e439 HR |
2432 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
2433 | if (ret) { | |
84d18f06 | 2434 | if (local_err) { |
e428e439 HR |
2435 | error_propagate(errp, local_err); |
2436 | } | |
f3a5d3f8 | 2437 | return ret; |
e428e439 | 2438 | } |
f3a5d3f8 | 2439 | |
9b2260cb | 2440 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2441 | ioctl(s->fd, CDIOCALLOW); |
2442 | return 0; | |
2443 | } | |
2444 | ||
508c7cb3 CH |
2445 | static int cdrom_probe_device(const char *filename) |
2446 | { | |
2447 | if (strstart(filename, "/dev/cd", NULL) || | |
2448 | strstart(filename, "/dev/acd", NULL)) | |
2449 | return 100; | |
2450 | return 0; | |
2451 | } | |
2452 | ||
f3a5d3f8 CH |
2453 | static int cdrom_reopen(BlockDriverState *bs) |
2454 | { | |
2455 | BDRVRawState *s = bs->opaque; | |
2456 | int fd; | |
2457 | ||
2458 | /* | |
2459 | * Force reread of possibly changed/newly loaded disc, | |
2460 | * FreeBSD seems to not notice sometimes... | |
2461 | */ | |
2462 | if (s->fd >= 0) | |
2e1e79da | 2463 | qemu_close(s->fd); |
6165f4d8 | 2464 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
f3a5d3f8 CH |
2465 | if (fd < 0) { |
2466 | s->fd = -1; | |
2467 | return -EIO; | |
2468 | } | |
2469 | s->fd = fd; | |
2470 | ||
9b2260cb | 2471 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2472 | ioctl(s->fd, CDIOCALLOW); |
2473 | return 0; | |
2474 | } | |
2475 | ||
2476 | static int cdrom_is_inserted(BlockDriverState *bs) | |
2477 | { | |
2478 | return raw_getlength(bs) > 0; | |
2479 | } | |
2480 | ||
f36f3949 | 2481 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2482 | { |
2483 | BDRVRawState *s = bs->opaque; | |
2484 | ||
2485 | if (s->fd < 0) | |
822e1cd1 | 2486 | return; |
f3a5d3f8 CH |
2487 | |
2488 | (void) ioctl(s->fd, CDIOCALLOW); | |
2489 | ||
2490 | if (eject_flag) { | |
2491 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
2492 | perror("CDIOCEJECT"); | |
2493 | } else { | |
2494 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
2495 | perror("CDIOCCLOSE"); | |
2496 | } | |
2497 | ||
822e1cd1 | 2498 | cdrom_reopen(bs); |
f3a5d3f8 CH |
2499 | } |
2500 | ||
025e849a | 2501 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2502 | { |
2503 | BDRVRawState *s = bs->opaque; | |
2504 | ||
2505 | if (s->fd < 0) | |
7bf37fed | 2506 | return; |
f3a5d3f8 CH |
2507 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
2508 | /* | |
2509 | * Note: an error can happen if the distribution automatically | |
2510 | * mounts the CD-ROM | |
2511 | */ | |
2512 | /* perror("CDROM_LOCKDOOR"); */ | |
2513 | } | |
f3a5d3f8 CH |
2514 | } |
2515 | ||
2516 | static BlockDriver bdrv_host_cdrom = { | |
2517 | .format_name = "host_cdrom", | |
84a12e66 | 2518 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2519 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2520 | .bdrv_needs_filename = true, |
508c7cb3 | 2521 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2522 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2523 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2524 | .bdrv_close = raw_close, |
1bc6b705 JC |
2525 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2526 | .bdrv_reopen_commit = raw_reopen_commit, | |
2527 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2528 | .bdrv_create = hdev_create, |
6f482f74 | 2529 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2530 | |
f3a5d3f8 CH |
2531 | .bdrv_aio_readv = raw_aio_readv, |
2532 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2533 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2534 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2535 | .bdrv_io_plug = raw_aio_plug, |
2536 | .bdrv_io_unplug = raw_aio_unplug, | |
2537 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
f3a5d3f8 | 2538 | |
55b949c8 | 2539 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2540 | .bdrv_getlength = raw_getlength, |
2541 | .has_variable_length = true, | |
4a1d5e1f FZ |
2542 | .bdrv_get_allocated_file_size |
2543 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2544 | |
c2f3426c SH |
2545 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2546 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2547 | ||
19cb3738 | 2548 | /* removable device support */ |
f3a5d3f8 CH |
2549 | .bdrv_is_inserted = cdrom_is_inserted, |
2550 | .bdrv_eject = cdrom_eject, | |
025e849a | 2551 | .bdrv_lock_medium = cdrom_lock_medium, |
19cb3738 | 2552 | }; |
f3a5d3f8 | 2553 | #endif /* __FreeBSD__ */ |
5efa9d5a | 2554 | |
84a12e66 | 2555 | static void bdrv_file_init(void) |
5efa9d5a | 2556 | { |
508c7cb3 CH |
2557 | /* |
2558 | * Register all the drivers. Note that order is important, the driver | |
2559 | * registered last will get probed first. | |
2560 | */ | |
84a12e66 | 2561 | bdrv_register(&bdrv_file); |
5efa9d5a | 2562 | bdrv_register(&bdrv_host_device); |
f3a5d3f8 CH |
2563 | #ifdef __linux__ |
2564 | bdrv_register(&bdrv_host_floppy); | |
2565 | bdrv_register(&bdrv_host_cdrom); | |
2566 | #endif | |
a167ba50 | 2567 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
2568 | bdrv_register(&bdrv_host_cdrom); |
2569 | #endif | |
5efa9d5a AL |
2570 | } |
2571 | ||
84a12e66 | 2572 | block_init(bdrv_file_init); |