]>
Commit | Line | Data |
---|---|---|
83f64091 | 1 | /* |
223d4670 | 2 | * Block driver for RAW files (posix) |
5fafdf24 | 3 | * |
83f64091 | 4 | * Copyright (c) 2006 Fabrice Bellard |
5fafdf24 | 5 | * |
83f64091 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
faf07963 | 24 | #include "qemu-common.h" |
1de7afc9 PB |
25 | #include "qemu/timer.h" |
26 | #include "qemu/log.h" | |
737e150e | 27 | #include "block/block_int.h" |
1de7afc9 | 28 | #include "qemu/module.h" |
de81a169 | 29 | #include "trace.h" |
737e150e | 30 | #include "block/thread-pool.h" |
1de7afc9 | 31 | #include "qemu/iov.h" |
9f8540ec | 32 | #include "raw-aio.h" |
83f64091 | 33 | |
83affaa6 | 34 | #if defined(__APPLE__) && (__MACH__) |
83f64091 FB |
35 | #include <paths.h> |
36 | #include <sys/param.h> | |
37 | #include <IOKit/IOKitLib.h> | |
38 | #include <IOKit/IOBSD.h> | |
39 | #include <IOKit/storage/IOMediaBSDClient.h> | |
40 | #include <IOKit/storage/IOMedia.h> | |
41 | #include <IOKit/storage/IOCDMedia.h> | |
42 | //#include <IOKit/storage/IOCDTypes.h> | |
43 | #include <CoreFoundation/CoreFoundation.h> | |
44 | #endif | |
45 | ||
46 | #ifdef __sun__ | |
2e9671da | 47 | #define _POSIX_PTHREAD_SEMANTICS 1 |
83f64091 FB |
48 | #include <sys/dkio.h> |
49 | #endif | |
19cb3738 | 50 | #ifdef __linux__ |
343f8568 JS |
51 | #include <sys/types.h> |
52 | #include <sys/stat.h> | |
19cb3738 | 53 | #include <sys/ioctl.h> |
05acda4d | 54 | #include <sys/param.h> |
19cb3738 FB |
55 | #include <linux/cdrom.h> |
56 | #include <linux/fd.h> | |
5500316d | 57 | #include <linux/fs.h> |
4ab15590 CL |
58 | #ifndef FS_NOCOW_FL |
59 | #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ | |
60 | #endif | |
5500316d PB |
61 | #endif |
62 | #ifdef CONFIG_FIEMAP | |
63 | #include <linux/fiemap.h> | |
19cb3738 | 64 | #endif |
3d4fa43e KK |
65 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
66 | #include <linux/falloc.h> | |
67 | #endif | |
a167ba50 | 68 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
1cb6c3fd | 69 | #include <sys/disk.h> |
9f23011a | 70 | #include <sys/cdio.h> |
1cb6c3fd | 71 | #endif |
83f64091 | 72 | |
128ab2ff BS |
73 | #ifdef __OpenBSD__ |
74 | #include <sys/ioctl.h> | |
75 | #include <sys/disklabel.h> | |
76 | #include <sys/dkio.h> | |
77 | #endif | |
78 | ||
d1f6fd8d CE |
79 | #ifdef __NetBSD__ |
80 | #include <sys/ioctl.h> | |
81 | #include <sys/disklabel.h> | |
82 | #include <sys/dkio.h> | |
83 | #include <sys/disk.h> | |
84 | #endif | |
85 | ||
c5e97233 BS |
86 | #ifdef __DragonFly__ |
87 | #include <sys/ioctl.h> | |
88 | #include <sys/diskslice.h> | |
89 | #endif | |
90 | ||
dce512de CH |
91 | #ifdef CONFIG_XFS |
92 | #include <xfs/xfs.h> | |
93 | #endif | |
94 | ||
19cb3738 | 95 | //#define DEBUG_FLOPPY |
83f64091 | 96 | |
faf07963 | 97 | //#define DEBUG_BLOCK |
03ff3ca3 | 98 | #if defined(DEBUG_BLOCK) |
001faf32 BS |
99 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ |
100 | { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) | |
8c05dbf9 | 101 | #else |
001faf32 | 102 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) |
8c05dbf9 TS |
103 | #endif |
104 | ||
f6465578 AL |
105 | /* OS X does not have O_DSYNC */ |
106 | #ifndef O_DSYNC | |
1c27a8b3 | 107 | #ifdef O_SYNC |
7ab064d2 | 108 | #define O_DSYNC O_SYNC |
1c27a8b3 JA |
109 | #elif defined(O_FSYNC) |
110 | #define O_DSYNC O_FSYNC | |
111 | #endif | |
f6465578 AL |
112 | #endif |
113 | ||
9f7965c7 AL |
114 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
115 | #ifndef O_DIRECT | |
116 | #define O_DIRECT O_DSYNC | |
117 | #endif | |
118 | ||
19cb3738 FB |
119 | #define FTYPE_FILE 0 |
120 | #define FTYPE_CD 1 | |
121 | #define FTYPE_FD 2 | |
83f64091 | 122 | |
c57c846a | 123 | /* if the FD is not accessed during that time (in ns), we try to |
19cb3738 | 124 | reopen it to see if the disk has been changed */ |
c57c846a | 125 | #define FD_OPEN_TIMEOUT (1000000000) |
83f64091 | 126 | |
581b9e29 CH |
127 | #define MAX_BLOCKSIZE 4096 |
128 | ||
19cb3738 FB |
129 | typedef struct BDRVRawState { |
130 | int fd; | |
131 | int type; | |
0e1d8f4c | 132 | int open_flags; |
c25f53b0 PB |
133 | size_t buf_align; |
134 | ||
19cb3738 FB |
135 | #if defined(__linux__) |
136 | /* linux floppy specific */ | |
19cb3738 FB |
137 | int64_t fd_open_time; |
138 | int64_t fd_error_time; | |
139 | int fd_got_error; | |
140 | int fd_media_changed; | |
83f64091 | 141 | #endif |
e44bd6fc | 142 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c | 143 | int use_aio; |
1e5b9d2f | 144 | void *aio_ctx; |
e44bd6fc | 145 | #endif |
dce512de | 146 | #ifdef CONFIG_XFS |
260a82e5 | 147 | bool is_xfs:1; |
dce512de | 148 | #endif |
260a82e5 | 149 | bool has_discard:1; |
97a2ae34 | 150 | bool has_write_zeroes:1; |
260a82e5 | 151 | bool discard_zeroes:1; |
4f11aa8a HR |
152 | #ifdef CONFIG_FIEMAP |
153 | bool skip_fiemap; | |
154 | #endif | |
19cb3738 FB |
155 | } BDRVRawState; |
156 | ||
eeb6b45d JC |
157 | typedef struct BDRVRawReopenState { |
158 | int fd; | |
159 | int open_flags; | |
160 | #ifdef CONFIG_LINUX_AIO | |
161 | int use_aio; | |
162 | #endif | |
163 | } BDRVRawReopenState; | |
164 | ||
19cb3738 | 165 | static int fd_open(BlockDriverState *bs); |
22afa7b5 | 166 | static int64_t raw_getlength(BlockDriverState *bs); |
83f64091 | 167 | |
de81a169 PB |
168 | typedef struct RawPosixAIOData { |
169 | BlockDriverState *bs; | |
170 | int aio_fildes; | |
171 | union { | |
172 | struct iovec *aio_iov; | |
173 | void *aio_ioctl_buf; | |
174 | }; | |
175 | int aio_niov; | |
8238010b | 176 | uint64_t aio_nbytes; |
de81a169 PB |
177 | #define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */ |
178 | off_t aio_offset; | |
179 | int aio_type; | |
180 | } RawPosixAIOData; | |
181 | ||
a167ba50 | 182 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 | 183 | static int cdrom_reopen(BlockDriverState *bs); |
9f23011a BS |
184 | #endif |
185 | ||
1de1ae0a CE |
186 | #if defined(__NetBSD__) |
187 | static int raw_normalize_devicepath(const char **filename) | |
188 | { | |
189 | static char namebuf[PATH_MAX]; | |
190 | const char *dp, *fname; | |
191 | struct stat sb; | |
192 | ||
193 | fname = *filename; | |
194 | dp = strrchr(fname, '/'); | |
195 | if (lstat(fname, &sb) < 0) { | |
196 | fprintf(stderr, "%s: stat failed: %s\n", | |
197 | fname, strerror(errno)); | |
198 | return -errno; | |
199 | } | |
200 | ||
201 | if (!S_ISBLK(sb.st_mode)) { | |
202 | return 0; | |
203 | } | |
204 | ||
205 | if (dp == NULL) { | |
206 | snprintf(namebuf, PATH_MAX, "r%s", fname); | |
207 | } else { | |
208 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", | |
209 | (int)(dp - fname), fname, dp + 1); | |
210 | } | |
211 | fprintf(stderr, "%s is a block device", fname); | |
212 | *filename = namebuf; | |
213 | fprintf(stderr, ", using %s\n", *filename); | |
214 | ||
215 | return 0; | |
216 | } | |
217 | #else | |
218 | static int raw_normalize_devicepath(const char **filename) | |
219 | { | |
220 | return 0; | |
221 | } | |
222 | #endif | |
223 | ||
c25f53b0 PB |
224 | static void raw_probe_alignment(BlockDriverState *bs) |
225 | { | |
226 | BDRVRawState *s = bs->opaque; | |
227 | char *buf; | |
228 | unsigned int sector_size; | |
229 | ||
230 | /* For /dev/sg devices the alignment is not really used. | |
231 | With buffered I/O, we don't have any restrictions. */ | |
232 | if (bs->sg || !(s->open_flags & O_DIRECT)) { | |
233 | bs->request_alignment = 1; | |
234 | s->buf_align = 1; | |
235 | return; | |
236 | } | |
237 | ||
238 | /* Try a few ioctls to get the right size */ | |
239 | bs->request_alignment = 0; | |
240 | s->buf_align = 0; | |
241 | ||
242 | #ifdef BLKSSZGET | |
243 | if (ioctl(s->fd, BLKSSZGET, §or_size) >= 0) { | |
244 | bs->request_alignment = sector_size; | |
245 | } | |
246 | #endif | |
247 | #ifdef DKIOCGETBLOCKSIZE | |
248 | if (ioctl(s->fd, DKIOCGETBLOCKSIZE, §or_size) >= 0) { | |
249 | bs->request_alignment = sector_size; | |
250 | } | |
251 | #endif | |
252 | #ifdef DIOCGSECTORSIZE | |
253 | if (ioctl(s->fd, DIOCGSECTORSIZE, §or_size) >= 0) { | |
254 | bs->request_alignment = sector_size; | |
255 | } | |
256 | #endif | |
257 | #ifdef CONFIG_XFS | |
258 | if (s->is_xfs) { | |
259 | struct dioattr da; | |
260 | if (xfsctl(NULL, s->fd, XFS_IOC_DIOINFO, &da) >= 0) { | |
261 | bs->request_alignment = da.d_miniosz; | |
262 | /* The kernel returns wrong information for d_mem */ | |
263 | /* s->buf_align = da.d_mem; */ | |
264 | } | |
265 | } | |
266 | #endif | |
267 | ||
268 | /* If we could not get the sizes so far, we can only guess them */ | |
269 | if (!s->buf_align) { | |
270 | size_t align; | |
271 | buf = qemu_memalign(MAX_BLOCKSIZE, 2 * MAX_BLOCKSIZE); | |
272 | for (align = 512; align <= MAX_BLOCKSIZE; align <<= 1) { | |
273 | if (pread(s->fd, buf + align, MAX_BLOCKSIZE, 0) >= 0) { | |
274 | s->buf_align = align; | |
275 | break; | |
276 | } | |
277 | } | |
278 | qemu_vfree(buf); | |
279 | } | |
280 | ||
281 | if (!bs->request_alignment) { | |
282 | size_t align; | |
283 | buf = qemu_memalign(s->buf_align, MAX_BLOCKSIZE); | |
284 | for (align = 512; align <= MAX_BLOCKSIZE; align <<= 1) { | |
285 | if (pread(s->fd, buf, align, 0) >= 0) { | |
286 | bs->request_alignment = align; | |
287 | break; | |
288 | } | |
289 | } | |
290 | qemu_vfree(buf); | |
291 | } | |
292 | } | |
293 | ||
6a8dc042 JC |
294 | static void raw_parse_flags(int bdrv_flags, int *open_flags) |
295 | { | |
296 | assert(open_flags != NULL); | |
297 | ||
298 | *open_flags |= O_BINARY; | |
299 | *open_flags &= ~O_ACCMODE; | |
300 | if (bdrv_flags & BDRV_O_RDWR) { | |
301 | *open_flags |= O_RDWR; | |
302 | } else { | |
303 | *open_flags |= O_RDONLY; | |
304 | } | |
305 | ||
306 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
307 | * and O_DIRECT for no caching. */ | |
308 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
309 | *open_flags |= O_DIRECT; | |
310 | } | |
6a8dc042 JC |
311 | } |
312 | ||
c2f3426c SH |
313 | static void raw_detach_aio_context(BlockDriverState *bs) |
314 | { | |
315 | #ifdef CONFIG_LINUX_AIO | |
316 | BDRVRawState *s = bs->opaque; | |
317 | ||
318 | if (s->use_aio) { | |
319 | laio_detach_aio_context(s->aio_ctx, bdrv_get_aio_context(bs)); | |
320 | } | |
321 | #endif | |
322 | } | |
323 | ||
324 | static void raw_attach_aio_context(BlockDriverState *bs, | |
325 | AioContext *new_context) | |
326 | { | |
327 | #ifdef CONFIG_LINUX_AIO | |
328 | BDRVRawState *s = bs->opaque; | |
329 | ||
330 | if (s->use_aio) { | |
331 | laio_attach_aio_context(s->aio_ctx, new_context); | |
332 | } | |
333 | #endif | |
334 | } | |
335 | ||
fc32a72d JC |
336 | #ifdef CONFIG_LINUX_AIO |
337 | static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) | |
338 | { | |
339 | int ret = -1; | |
340 | assert(aio_ctx != NULL); | |
341 | assert(use_aio != NULL); | |
342 | /* | |
343 | * Currently Linux do AIO only for files opened with O_DIRECT | |
344 | * specified so check NOCACHE flag too | |
345 | */ | |
346 | if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) == | |
347 | (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { | |
348 | ||
349 | /* if non-NULL, laio_init() has already been run */ | |
350 | if (*aio_ctx == NULL) { | |
351 | *aio_ctx = laio_init(); | |
352 | if (!*aio_ctx) { | |
353 | goto error; | |
354 | } | |
355 | } | |
356 | *use_aio = 1; | |
357 | } else { | |
358 | *use_aio = 0; | |
359 | } | |
360 | ||
361 | ret = 0; | |
362 | ||
363 | error: | |
364 | return ret; | |
365 | } | |
366 | #endif | |
367 | ||
078896a9 HR |
368 | static void raw_parse_filename(const char *filename, QDict *options, |
369 | Error **errp) | |
370 | { | |
371 | /* The filename does not have to be prefixed by the protocol name, since | |
372 | * "file" is the default protocol; therefore, the return value of this | |
373 | * function call can be ignored. */ | |
374 | strstart(filename, "file:", &filename); | |
375 | ||
376 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
377 | } | |
378 | ||
c66a6157 KW |
379 | static QemuOptsList raw_runtime_opts = { |
380 | .name = "raw", | |
381 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
382 | .desc = { | |
383 | { | |
384 | .name = "filename", | |
385 | .type = QEMU_OPT_STRING, | |
386 | .help = "File name of the image", | |
387 | }, | |
388 | { /* end of list */ } | |
389 | }, | |
390 | }; | |
391 | ||
392 | static int raw_open_common(BlockDriverState *bs, QDict *options, | |
e428e439 | 393 | int bdrv_flags, int open_flags, Error **errp) |
83f64091 FB |
394 | { |
395 | BDRVRawState *s = bs->opaque; | |
c66a6157 KW |
396 | QemuOpts *opts; |
397 | Error *local_err = NULL; | |
8bfea15d | 398 | const char *filename = NULL; |
0e1d8f4c | 399 | int fd, ret; |
260a82e5 | 400 | struct stat st; |
83f64091 | 401 | |
87ea75d5 | 402 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
c66a6157 | 403 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 404 | if (local_err) { |
e428e439 | 405 | error_propagate(errp, local_err); |
c66a6157 KW |
406 | ret = -EINVAL; |
407 | goto fail; | |
408 | } | |
409 | ||
410 | filename = qemu_opt_get(opts, "filename"); | |
411 | ||
1de1ae0a CE |
412 | ret = raw_normalize_devicepath(&filename); |
413 | if (ret != 0) { | |
e428e439 | 414 | error_setg_errno(errp, -ret, "Could not normalize device path"); |
c66a6157 | 415 | goto fail; |
1de1ae0a CE |
416 | } |
417 | ||
6a8dc042 JC |
418 | s->open_flags = open_flags; |
419 | raw_parse_flags(bdrv_flags, &s->open_flags); | |
83f64091 | 420 | |
90babde0 | 421 | s->fd = -1; |
40ff6d7e | 422 | fd = qemu_open(filename, s->open_flags, 0644); |
19cb3738 FB |
423 | if (fd < 0) { |
424 | ret = -errno; | |
c66a6157 | 425 | if (ret == -EROFS) { |
19cb3738 | 426 | ret = -EACCES; |
c66a6157 KW |
427 | } |
428 | goto fail; | |
19cb3738 | 429 | } |
83f64091 | 430 | s->fd = fd; |
9ef91a67 | 431 | |
5c6c3a6c | 432 | #ifdef CONFIG_LINUX_AIO |
fc32a72d | 433 | if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) { |
47e6b251 | 434 | qemu_close(fd); |
c66a6157 | 435 | ret = -errno; |
e428e439 | 436 | error_setg_errno(errp, -ret, "Could not set AIO state"); |
c66a6157 | 437 | goto fail; |
9ef91a67 | 438 | } |
fc32a72d | 439 | #endif |
9ef91a67 | 440 | |
7ce21016 | 441 | s->has_discard = true; |
97a2ae34 | 442 | s->has_write_zeroes = true; |
260a82e5 PB |
443 | |
444 | if (fstat(s->fd, &st) < 0) { | |
445 | error_setg_errno(errp, errno, "Could not stat file"); | |
446 | goto fail; | |
447 | } | |
448 | if (S_ISREG(st.st_mode)) { | |
449 | s->discard_zeroes = true; | |
450 | } | |
d0b4503e PB |
451 | if (S_ISBLK(st.st_mode)) { |
452 | #ifdef BLKDISCARDZEROES | |
453 | unsigned int arg; | |
454 | if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) { | |
455 | s->discard_zeroes = true; | |
456 | } | |
457 | #endif | |
458 | #ifdef __linux__ | |
459 | /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do | |
460 | * not rely on the contents of discarded blocks unless using O_DIRECT. | |
97a2ae34 | 461 | * Same for BLKZEROOUT. |
d0b4503e PB |
462 | */ |
463 | if (!(bs->open_flags & BDRV_O_NOCACHE)) { | |
464 | s->discard_zeroes = false; | |
97a2ae34 | 465 | s->has_write_zeroes = false; |
d0b4503e PB |
466 | } |
467 | #endif | |
468 | } | |
260a82e5 | 469 | |
dce512de CH |
470 | #ifdef CONFIG_XFS |
471 | if (platform_test_xfs_fd(s->fd)) { | |
7ce21016 | 472 | s->is_xfs = true; |
dce512de CH |
473 | } |
474 | #endif | |
475 | ||
c2f3426c SH |
476 | raw_attach_aio_context(bs, bdrv_get_aio_context(bs)); |
477 | ||
c66a6157 KW |
478 | ret = 0; |
479 | fail: | |
8bfea15d KW |
480 | if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { |
481 | unlink(filename); | |
482 | } | |
c66a6157 KW |
483 | qemu_opts_del(opts); |
484 | return ret; | |
83f64091 FB |
485 | } |
486 | ||
015a1036 HR |
487 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
488 | Error **errp) | |
90babde0 CH |
489 | { |
490 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
491 | Error *local_err = NULL; |
492 | int ret; | |
90babde0 CH |
493 | |
494 | s->type = FTYPE_FILE; | |
e428e439 | 495 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
84d18f06 | 496 | if (local_err) { |
e428e439 HR |
497 | error_propagate(errp, local_err); |
498 | } | |
499 | return ret; | |
90babde0 CH |
500 | } |
501 | ||
eeb6b45d JC |
502 | static int raw_reopen_prepare(BDRVReopenState *state, |
503 | BlockReopenQueue *queue, Error **errp) | |
504 | { | |
505 | BDRVRawState *s; | |
506 | BDRVRawReopenState *raw_s; | |
507 | int ret = 0; | |
508 | ||
509 | assert(state != NULL); | |
510 | assert(state->bs != NULL); | |
511 | ||
512 | s = state->bs->opaque; | |
513 | ||
514 | state->opaque = g_malloc0(sizeof(BDRVRawReopenState)); | |
515 | raw_s = state->opaque; | |
516 | ||
517 | #ifdef CONFIG_LINUX_AIO | |
518 | raw_s->use_aio = s->use_aio; | |
519 | ||
520 | /* we can use s->aio_ctx instead of a copy, because the use_aio flag is | |
521 | * valid in the 'false' condition even if aio_ctx is set, and raw_set_aio() | |
522 | * won't override aio_ctx if aio_ctx is non-NULL */ | |
523 | if (raw_set_aio(&s->aio_ctx, &raw_s->use_aio, state->flags)) { | |
e428e439 | 524 | error_setg(errp, "Could not set AIO state"); |
eeb6b45d JC |
525 | return -1; |
526 | } | |
527 | #endif | |
528 | ||
1bc6b705 JC |
529 | if (s->type == FTYPE_FD || s->type == FTYPE_CD) { |
530 | raw_s->open_flags |= O_NONBLOCK; | |
531 | } | |
532 | ||
eeb6b45d JC |
533 | raw_parse_flags(state->flags, &raw_s->open_flags); |
534 | ||
535 | raw_s->fd = -1; | |
536 | ||
fdf263f6 | 537 | int fcntl_flags = O_APPEND | O_NONBLOCK; |
eeb6b45d JC |
538 | #ifdef O_NOATIME |
539 | fcntl_flags |= O_NOATIME; | |
540 | #endif | |
541 | ||
fdf263f6 AF |
542 | #ifdef O_ASYNC |
543 | /* Not all operating systems have O_ASYNC, and those that don't | |
544 | * will not let us track the state into raw_s->open_flags (typically | |
545 | * you achieve the same effect with an ioctl, for example I_SETSIG | |
546 | * on Solaris). But we do not use O_ASYNC, so that's fine. | |
547 | */ | |
548 | assert((s->open_flags & O_ASYNC) == 0); | |
549 | #endif | |
550 | ||
eeb6b45d JC |
551 | if ((raw_s->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { |
552 | /* dup the original fd */ | |
553 | /* TODO: use qemu fcntl wrapper */ | |
554 | #ifdef F_DUPFD_CLOEXEC | |
555 | raw_s->fd = fcntl(s->fd, F_DUPFD_CLOEXEC, 0); | |
556 | #else | |
557 | raw_s->fd = dup(s->fd); | |
558 | if (raw_s->fd != -1) { | |
559 | qemu_set_cloexec(raw_s->fd); | |
560 | } | |
561 | #endif | |
562 | if (raw_s->fd >= 0) { | |
563 | ret = fcntl_setfl(raw_s->fd, raw_s->open_flags); | |
564 | if (ret) { | |
565 | qemu_close(raw_s->fd); | |
566 | raw_s->fd = -1; | |
567 | } | |
568 | } | |
569 | } | |
570 | ||
571 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ | |
572 | if (raw_s->fd == -1) { | |
573 | assert(!(raw_s->open_flags & O_CREAT)); | |
574 | raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags); | |
575 | if (raw_s->fd == -1) { | |
e428e439 | 576 | error_setg_errno(errp, errno, "Could not reopen file"); |
eeb6b45d JC |
577 | ret = -1; |
578 | } | |
579 | } | |
580 | return ret; | |
581 | } | |
582 | ||
eeb6b45d JC |
583 | static void raw_reopen_commit(BDRVReopenState *state) |
584 | { | |
585 | BDRVRawReopenState *raw_s = state->opaque; | |
586 | BDRVRawState *s = state->bs->opaque; | |
587 | ||
588 | s->open_flags = raw_s->open_flags; | |
589 | ||
590 | qemu_close(s->fd); | |
591 | s->fd = raw_s->fd; | |
592 | #ifdef CONFIG_LINUX_AIO | |
593 | s->use_aio = raw_s->use_aio; | |
594 | #endif | |
595 | ||
596 | g_free(state->opaque); | |
597 | state->opaque = NULL; | |
598 | } | |
599 | ||
600 | ||
601 | static void raw_reopen_abort(BDRVReopenState *state) | |
602 | { | |
603 | BDRVRawReopenState *raw_s = state->opaque; | |
604 | ||
605 | /* nothing to do if NULL, we didn't get far enough */ | |
606 | if (raw_s == NULL) { | |
607 | return; | |
608 | } | |
609 | ||
610 | if (raw_s->fd >= 0) { | |
611 | qemu_close(raw_s->fd); | |
612 | raw_s->fd = -1; | |
613 | } | |
614 | g_free(state->opaque); | |
615 | state->opaque = NULL; | |
616 | } | |
617 | ||
c25f53b0 PB |
618 | static int raw_refresh_limits(BlockDriverState *bs) |
619 | { | |
620 | BDRVRawState *s = bs->opaque; | |
eeb6b45d | 621 | |
c25f53b0 PB |
622 | raw_probe_alignment(bs); |
623 | bs->bl.opt_mem_alignment = s->buf_align; | |
624 | ||
625 | return 0; | |
626 | } | |
83f64091 | 627 | |
de81a169 PB |
628 | static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb) |
629 | { | |
630 | int ret; | |
631 | ||
632 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); | |
633 | if (ret == -1) { | |
634 | return -errno; | |
635 | } | |
636 | ||
b608c8dc | 637 | return 0; |
de81a169 PB |
638 | } |
639 | ||
640 | static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb) | |
641 | { | |
642 | int ret; | |
643 | ||
644 | ret = qemu_fdatasync(aiocb->aio_fildes); | |
645 | if (ret == -1) { | |
646 | return -errno; | |
647 | } | |
648 | return 0; | |
649 | } | |
650 | ||
651 | #ifdef CONFIG_PREADV | |
652 | ||
653 | static bool preadv_present = true; | |
654 | ||
655 | static ssize_t | |
656 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
657 | { | |
658 | return preadv(fd, iov, nr_iov, offset); | |
659 | } | |
660 | ||
661 | static ssize_t | |
662 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
663 | { | |
664 | return pwritev(fd, iov, nr_iov, offset); | |
665 | } | |
666 | ||
667 | #else | |
668 | ||
669 | static bool preadv_present = false; | |
670 | ||
671 | static ssize_t | |
672 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
673 | { | |
674 | return -ENOSYS; | |
675 | } | |
676 | ||
677 | static ssize_t | |
678 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
679 | { | |
680 | return -ENOSYS; | |
681 | } | |
682 | ||
683 | #endif | |
684 | ||
685 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) | |
686 | { | |
687 | ssize_t len; | |
688 | ||
689 | do { | |
690 | if (aiocb->aio_type & QEMU_AIO_WRITE) | |
691 | len = qemu_pwritev(aiocb->aio_fildes, | |
692 | aiocb->aio_iov, | |
693 | aiocb->aio_niov, | |
694 | aiocb->aio_offset); | |
695 | else | |
696 | len = qemu_preadv(aiocb->aio_fildes, | |
697 | aiocb->aio_iov, | |
698 | aiocb->aio_niov, | |
699 | aiocb->aio_offset); | |
700 | } while (len == -1 && errno == EINTR); | |
701 | ||
702 | if (len == -1) { | |
703 | return -errno; | |
704 | } | |
705 | return len; | |
706 | } | |
707 | ||
708 | /* | |
709 | * Read/writes the data to/from a given linear buffer. | |
710 | * | |
711 | * Returns the number of bytes handles or -errno in case of an error. Short | |
712 | * reads are only returned if the end of the file is reached. | |
713 | */ | |
714 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) | |
715 | { | |
716 | ssize_t offset = 0; | |
717 | ssize_t len; | |
718 | ||
719 | while (offset < aiocb->aio_nbytes) { | |
720 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
721 | len = pwrite(aiocb->aio_fildes, | |
722 | (const char *)buf + offset, | |
723 | aiocb->aio_nbytes - offset, | |
724 | aiocb->aio_offset + offset); | |
725 | } else { | |
726 | len = pread(aiocb->aio_fildes, | |
727 | buf + offset, | |
728 | aiocb->aio_nbytes - offset, | |
729 | aiocb->aio_offset + offset); | |
730 | } | |
731 | if (len == -1 && errno == EINTR) { | |
732 | continue; | |
733 | } else if (len == -1) { | |
734 | offset = -errno; | |
735 | break; | |
736 | } else if (len == 0) { | |
737 | break; | |
738 | } | |
739 | offset += len; | |
740 | } | |
741 | ||
742 | return offset; | |
743 | } | |
744 | ||
745 | static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) | |
746 | { | |
747 | ssize_t nbytes; | |
748 | char *buf; | |
749 | ||
750 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { | |
751 | /* | |
752 | * If there is just a single buffer, and it is properly aligned | |
753 | * we can just use plain pread/pwrite without any problems. | |
754 | */ | |
755 | if (aiocb->aio_niov == 1) { | |
756 | return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base); | |
757 | } | |
758 | /* | |
759 | * We have more than one iovec, and all are properly aligned. | |
760 | * | |
761 | * Try preadv/pwritev first and fall back to linearizing the | |
762 | * buffer if it's not supported. | |
763 | */ | |
764 | if (preadv_present) { | |
765 | nbytes = handle_aiocb_rw_vector(aiocb); | |
766 | if (nbytes == aiocb->aio_nbytes || | |
767 | (nbytes < 0 && nbytes != -ENOSYS)) { | |
768 | return nbytes; | |
769 | } | |
770 | preadv_present = false; | |
771 | } | |
772 | ||
773 | /* | |
774 | * XXX(hch): short read/write. no easy way to handle the reminder | |
775 | * using these interfaces. For now retry using plain | |
776 | * pread/pwrite? | |
777 | */ | |
778 | } | |
779 | ||
780 | /* | |
781 | * Ok, we have to do it the hard way, copy all segments into | |
782 | * a single aligned buffer. | |
783 | */ | |
784 | buf = qemu_blockalign(aiocb->bs, aiocb->aio_nbytes); | |
785 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
786 | char *p = buf; | |
787 | int i; | |
788 | ||
789 | for (i = 0; i < aiocb->aio_niov; ++i) { | |
790 | memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len); | |
791 | p += aiocb->aio_iov[i].iov_len; | |
792 | } | |
793 | } | |
794 | ||
795 | nbytes = handle_aiocb_rw_linear(aiocb, buf); | |
796 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { | |
797 | char *p = buf; | |
798 | size_t count = aiocb->aio_nbytes, copy; | |
799 | int i; | |
800 | ||
801 | for (i = 0; i < aiocb->aio_niov && count; ++i) { | |
802 | copy = count; | |
803 | if (copy > aiocb->aio_iov[i].iov_len) { | |
804 | copy = aiocb->aio_iov[i].iov_len; | |
805 | } | |
806 | memcpy(aiocb->aio_iov[i].iov_base, p, copy); | |
807 | p += copy; | |
808 | count -= copy; | |
809 | } | |
810 | } | |
811 | qemu_vfree(buf); | |
812 | ||
813 | return nbytes; | |
814 | } | |
815 | ||
8238010b | 816 | #ifdef CONFIG_XFS |
97a2ae34 PB |
817 | static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes) |
818 | { | |
819 | struct xfs_flock64 fl; | |
820 | ||
821 | memset(&fl, 0, sizeof(fl)); | |
822 | fl.l_whence = SEEK_SET; | |
823 | fl.l_start = offset; | |
824 | fl.l_len = bytes; | |
825 | ||
826 | if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) { | |
827 | DEBUG_BLOCK_PRINT("cannot write zero range (%s)\n", strerror(errno)); | |
828 | return -errno; | |
829 | } | |
830 | ||
831 | return 0; | |
832 | } | |
833 | ||
8238010b PB |
834 | static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes) |
835 | { | |
836 | struct xfs_flock64 fl; | |
837 | ||
838 | memset(&fl, 0, sizeof(fl)); | |
839 | fl.l_whence = SEEK_SET; | |
840 | fl.l_start = offset; | |
841 | fl.l_len = bytes; | |
842 | ||
843 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
844 | DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno)); | |
845 | return -errno; | |
846 | } | |
847 | ||
848 | return 0; | |
849 | } | |
850 | #endif | |
851 | ||
97a2ae34 PB |
852 | static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) |
853 | { | |
854 | int ret = -EOPNOTSUPP; | |
855 | BDRVRawState *s = aiocb->bs->opaque; | |
856 | ||
857 | if (s->has_write_zeroes == 0) { | |
858 | return -ENOTSUP; | |
859 | } | |
860 | ||
861 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
862 | #ifdef BLKZEROOUT | |
863 | do { | |
864 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
865 | if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) { | |
866 | return 0; | |
867 | } | |
868 | } while (errno == EINTR); | |
869 | ||
870 | ret = -errno; | |
871 | #endif | |
872 | } else { | |
873 | #ifdef CONFIG_XFS | |
874 | if (s->is_xfs) { | |
875 | return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
876 | } | |
877 | #endif | |
878 | } | |
879 | ||
880 | if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP || | |
881 | ret == -ENOTTY) { | |
882 | s->has_write_zeroes = false; | |
883 | ret = -ENOTSUP; | |
884 | } | |
885 | return ret; | |
886 | } | |
887 | ||
8238010b PB |
888 | static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb) |
889 | { | |
890 | int ret = -EOPNOTSUPP; | |
891 | BDRVRawState *s = aiocb->bs->opaque; | |
892 | ||
7ce21016 PB |
893 | if (!s->has_discard) { |
894 | return -ENOTSUP; | |
8238010b PB |
895 | } |
896 | ||
897 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
898 | #ifdef BLKDISCARD | |
899 | do { | |
900 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
901 | if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) { | |
902 | return 0; | |
903 | } | |
904 | } while (errno == EINTR); | |
905 | ||
906 | ret = -errno; | |
907 | #endif | |
908 | } else { | |
909 | #ifdef CONFIG_XFS | |
910 | if (s->is_xfs) { | |
911 | return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
912 | } | |
913 | #endif | |
914 | ||
915 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE | |
916 | do { | |
917 | if (fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, | |
918 | aiocb->aio_offset, aiocb->aio_nbytes) == 0) { | |
919 | return 0; | |
920 | } | |
921 | } while (errno == EINTR); | |
922 | ||
923 | ret = -errno; | |
924 | #endif | |
925 | } | |
926 | ||
927 | if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP || | |
928 | ret == -ENOTTY) { | |
7ce21016 PB |
929 | s->has_discard = false; |
930 | ret = -ENOTSUP; | |
8238010b PB |
931 | } |
932 | return ret; | |
933 | } | |
934 | ||
de81a169 PB |
935 | static int aio_worker(void *arg) |
936 | { | |
937 | RawPosixAIOData *aiocb = arg; | |
938 | ssize_t ret = 0; | |
939 | ||
940 | switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) { | |
941 | case QEMU_AIO_READ: | |
942 | ret = handle_aiocb_rw(aiocb); | |
943 | if (ret >= 0 && ret < aiocb->aio_nbytes && aiocb->bs->growable) { | |
944 | iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret, | |
945 | 0, aiocb->aio_nbytes - ret); | |
946 | ||
947 | ret = aiocb->aio_nbytes; | |
948 | } | |
949 | if (ret == aiocb->aio_nbytes) { | |
950 | ret = 0; | |
951 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
952 | ret = -EINVAL; | |
953 | } | |
954 | break; | |
955 | case QEMU_AIO_WRITE: | |
956 | ret = handle_aiocb_rw(aiocb); | |
957 | if (ret == aiocb->aio_nbytes) { | |
958 | ret = 0; | |
959 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
960 | ret = -EINVAL; | |
961 | } | |
962 | break; | |
963 | case QEMU_AIO_FLUSH: | |
964 | ret = handle_aiocb_flush(aiocb); | |
965 | break; | |
966 | case QEMU_AIO_IOCTL: | |
967 | ret = handle_aiocb_ioctl(aiocb); | |
968 | break; | |
8238010b PB |
969 | case QEMU_AIO_DISCARD: |
970 | ret = handle_aiocb_discard(aiocb); | |
971 | break; | |
97a2ae34 PB |
972 | case QEMU_AIO_WRITE_ZEROES: |
973 | ret = handle_aiocb_write_zeroes(aiocb); | |
974 | break; | |
de81a169 PB |
975 | default: |
976 | fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); | |
977 | ret = -EINVAL; | |
978 | break; | |
979 | } | |
980 | ||
981 | g_slice_free(RawPosixAIOData, aiocb); | |
982 | return ret; | |
983 | } | |
984 | ||
260a82e5 PB |
985 | static int paio_submit_co(BlockDriverState *bs, int fd, |
986 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
987 | int type) | |
988 | { | |
989 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
990 | ThreadPool *pool; | |
991 | ||
992 | acb->bs = bs; | |
993 | acb->aio_type = type; | |
994 | acb->aio_fildes = fd; | |
995 | ||
996 | if (qiov) { | |
997 | acb->aio_iov = qiov->iov; | |
998 | acb->aio_niov = qiov->niov; | |
999 | } | |
1000 | acb->aio_nbytes = nb_sectors * 512; | |
1001 | acb->aio_offset = sector_num * 512; | |
1002 | ||
1003 | trace_paio_submit_co(sector_num, nb_sectors, type); | |
1004 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); | |
1005 | return thread_pool_submit_co(pool, aio_worker, acb); | |
1006 | } | |
1007 | ||
de81a169 PB |
1008 | static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, |
1009 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1010 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
1011 | { | |
1012 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
c4d9d196 | 1013 | ThreadPool *pool; |
de81a169 PB |
1014 | |
1015 | acb->bs = bs; | |
1016 | acb->aio_type = type; | |
1017 | acb->aio_fildes = fd; | |
1018 | ||
1019 | if (qiov) { | |
1020 | acb->aio_iov = qiov->iov; | |
1021 | acb->aio_niov = qiov->niov; | |
1022 | } | |
1023 | acb->aio_nbytes = nb_sectors * 512; | |
1024 | acb->aio_offset = sector_num * 512; | |
1025 | ||
1026 | trace_paio_submit(acb, opaque, sector_num, nb_sectors, type); | |
c4d9d196 SH |
1027 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1028 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
de81a169 PB |
1029 | } |
1030 | ||
9ef91a67 CH |
1031 | static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs, |
1032 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1033 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
83f64091 | 1034 | { |
ce1a14dc | 1035 | BDRVRawState *s = bs->opaque; |
ce1a14dc | 1036 | |
19cb3738 FB |
1037 | if (fd_open(bs) < 0) |
1038 | return NULL; | |
1039 | ||
f141eafe AL |
1040 | /* |
1041 | * If O_DIRECT is used the buffer needs to be aligned on a sector | |
c1ee7d56 | 1042 | * boundary. Check if this is the case or tell the low-level |
9ef91a67 | 1043 | * driver that it needs to copy the buffer. |
f141eafe | 1044 | */ |
9acc5a06 | 1045 | if ((bs->open_flags & BDRV_O_NOCACHE)) { |
c53b1c51 | 1046 | if (!bdrv_qiov_is_aligned(bs, qiov)) { |
5c6c3a6c | 1047 | type |= QEMU_AIO_MISALIGNED; |
e44bd6fc | 1048 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c CH |
1049 | } else if (s->use_aio) { |
1050 | return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, | |
e44bd6fc SW |
1051 | nb_sectors, cb, opaque, type); |
1052 | #endif | |
5c6c3a6c | 1053 | } |
9ef91a67 | 1054 | } |
f141eafe | 1055 | |
1e5b9d2f | 1056 | return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors, |
9ef91a67 | 1057 | cb, opaque, type); |
83f64091 FB |
1058 | } |
1059 | ||
f141eafe AL |
1060 | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, |
1061 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 1062 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 1063 | { |
9ef91a67 CH |
1064 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
1065 | cb, opaque, QEMU_AIO_READ); | |
83f64091 FB |
1066 | } |
1067 | ||
f141eafe AL |
1068 | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, |
1069 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 1070 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 1071 | { |
9ef91a67 CH |
1072 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
1073 | cb, opaque, QEMU_AIO_WRITE); | |
83f64091 | 1074 | } |
53538725 | 1075 | |
b2e12bc6 CH |
1076 | static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs, |
1077 | BlockDriverCompletionFunc *cb, void *opaque) | |
1078 | { | |
1079 | BDRVRawState *s = bs->opaque; | |
1080 | ||
1081 | if (fd_open(bs) < 0) | |
1082 | return NULL; | |
1083 | ||
1e5b9d2f | 1084 | return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
b2e12bc6 CH |
1085 | } |
1086 | ||
83f64091 FB |
1087 | static void raw_close(BlockDriverState *bs) |
1088 | { | |
1089 | BDRVRawState *s = bs->opaque; | |
c2f3426c SH |
1090 | |
1091 | raw_detach_aio_context(bs); | |
1092 | ||
abd269b7 SH |
1093 | #ifdef CONFIG_LINUX_AIO |
1094 | if (s->use_aio) { | |
1095 | laio_cleanup(s->aio_ctx); | |
1096 | } | |
1097 | #endif | |
19cb3738 | 1098 | if (s->fd >= 0) { |
2e1e79da | 1099 | qemu_close(s->fd); |
19cb3738 FB |
1100 | s->fd = -1; |
1101 | } | |
83f64091 FB |
1102 | } |
1103 | ||
1104 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
1105 | { | |
1106 | BDRVRawState *s = bs->opaque; | |
55b949c8 CH |
1107 | struct stat st; |
1108 | ||
1109 | if (fstat(s->fd, &st)) { | |
83f64091 | 1110 | return -errno; |
55b949c8 CH |
1111 | } |
1112 | ||
1113 | if (S_ISREG(st.st_mode)) { | |
1114 | if (ftruncate(s->fd, offset) < 0) { | |
1115 | return -errno; | |
1116 | } | |
1117 | } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1118 | if (offset > raw_getlength(bs)) { | |
1119 | return -EINVAL; | |
1120 | } | |
1121 | } else { | |
1122 | return -ENOTSUP; | |
1123 | } | |
1124 | ||
83f64091 FB |
1125 | return 0; |
1126 | } | |
1127 | ||
128ab2ff BS |
1128 | #ifdef __OpenBSD__ |
1129 | static int64_t raw_getlength(BlockDriverState *bs) | |
1130 | { | |
1131 | BDRVRawState *s = bs->opaque; | |
1132 | int fd = s->fd; | |
1133 | struct stat st; | |
1134 | ||
1135 | if (fstat(fd, &st)) | |
1136 | return -1; | |
1137 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1138 | struct disklabel dl; | |
1139 | ||
1140 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
1141 | return -1; | |
1142 | return (uint64_t)dl.d_secsize * | |
1143 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1144 | } else | |
1145 | return st.st_size; | |
1146 | } | |
d1f6fd8d CE |
1147 | #elif defined(__NetBSD__) |
1148 | static int64_t raw_getlength(BlockDriverState *bs) | |
1149 | { | |
1150 | BDRVRawState *s = bs->opaque; | |
1151 | int fd = s->fd; | |
1152 | struct stat st; | |
1153 | ||
1154 | if (fstat(fd, &st)) | |
1155 | return -1; | |
1156 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1157 | struct dkwedge_info dkw; | |
1158 | ||
1159 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
1160 | return dkw.dkw_size * 512; | |
1161 | } else { | |
1162 | struct disklabel dl; | |
1163 | ||
1164 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
1165 | return -1; | |
1166 | return (uint64_t)dl.d_secsize * | |
1167 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1168 | } | |
1169 | } else | |
1170 | return st.st_size; | |
1171 | } | |
50779cc2 CH |
1172 | #elif defined(__sun__) |
1173 | static int64_t raw_getlength(BlockDriverState *bs) | |
1174 | { | |
1175 | BDRVRawState *s = bs->opaque; | |
1176 | struct dk_minfo minfo; | |
1177 | int ret; | |
1178 | ||
1179 | ret = fd_open(bs); | |
1180 | if (ret < 0) { | |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
1186 | */ | |
1187 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
1188 | if (ret != -1) { | |
1189 | return minfo.dki_lbsize * minfo.dki_capacity; | |
1190 | } | |
1191 | ||
1192 | /* | |
1193 | * There are reports that lseek on some devices fails, but | |
1194 | * irc discussion said that contingency on contingency was overkill. | |
1195 | */ | |
1196 | return lseek(s->fd, 0, SEEK_END); | |
1197 | } | |
1198 | #elif defined(CONFIG_BSD) | |
1199 | static int64_t raw_getlength(BlockDriverState *bs) | |
83f64091 FB |
1200 | { |
1201 | BDRVRawState *s = bs->opaque; | |
1202 | int fd = s->fd; | |
1203 | int64_t size; | |
83f64091 | 1204 | struct stat sb; |
a167ba50 | 1205 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a | 1206 | int reopened = 0; |
83f64091 | 1207 | #endif |
19cb3738 FB |
1208 | int ret; |
1209 | ||
1210 | ret = fd_open(bs); | |
1211 | if (ret < 0) | |
1212 | return ret; | |
83f64091 | 1213 | |
a167ba50 | 1214 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1215 | again: |
1216 | #endif | |
83f64091 FB |
1217 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
1218 | #ifdef DIOCGMEDIASIZE | |
1219 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
c5e97233 BS |
1220 | #elif defined(DIOCGPART) |
1221 | { | |
1222 | struct partinfo pi; | |
1223 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
1224 | size = pi.media_size; | |
1225 | else | |
1226 | size = 0; | |
1227 | } | |
1228 | if (size == 0) | |
83f64091 | 1229 | #endif |
83affaa6 | 1230 | #if defined(__APPLE__) && defined(__MACH__) |
675036e4 | 1231 | size = LLONG_MAX; |
83f64091 FB |
1232 | #else |
1233 | size = lseek(fd, 0LL, SEEK_END); | |
9f23011a | 1234 | #endif |
a167ba50 | 1235 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1236 | switch(s->type) { |
1237 | case FTYPE_CD: | |
1238 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
1239 | if (size == 2048LL * (unsigned)-1) | |
1240 | size = 0; | |
1241 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 1242 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
1243 | reopened = 1; |
1244 | goto again; | |
1245 | } | |
1246 | } | |
83f64091 | 1247 | #endif |
50779cc2 | 1248 | } else { |
83f64091 FB |
1249 | size = lseek(fd, 0, SEEK_END); |
1250 | } | |
83f64091 FB |
1251 | return size; |
1252 | } | |
50779cc2 CH |
1253 | #else |
1254 | static int64_t raw_getlength(BlockDriverState *bs) | |
1255 | { | |
1256 | BDRVRawState *s = bs->opaque; | |
1257 | int ret; | |
1258 | ||
1259 | ret = fd_open(bs); | |
1260 | if (ret < 0) { | |
1261 | return ret; | |
1262 | } | |
1263 | ||
1264 | return lseek(s->fd, 0, SEEK_END); | |
1265 | } | |
128ab2ff | 1266 | #endif |
83f64091 | 1267 | |
4a1d5e1f FZ |
1268 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
1269 | { | |
1270 | struct stat st; | |
1271 | BDRVRawState *s = bs->opaque; | |
1272 | ||
1273 | if (fstat(s->fd, &st) < 0) { | |
1274 | return -errno; | |
1275 | } | |
1276 | return (int64_t)st.st_blocks * 512; | |
1277 | } | |
1278 | ||
6f482f74 | 1279 | static int raw_create(const char *filename, QemuOpts *opts, Error **errp) |
83f64091 FB |
1280 | { |
1281 | int fd; | |
1e37d059 | 1282 | int result = 0; |
0e7e1989 | 1283 | int64_t total_size = 0; |
4ab15590 | 1284 | bool nocow = false; |
83f64091 | 1285 | |
464d9f64 HR |
1286 | strstart(filename, "file:", &filename); |
1287 | ||
0e7e1989 | 1288 | /* Read out options */ |
6f482f74 CL |
1289 | total_size = |
1290 | qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE; | |
4ab15590 | 1291 | nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false); |
83f64091 | 1292 | |
6165f4d8 CB |
1293 | fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
1294 | 0644); | |
1e37d059 SW |
1295 | if (fd < 0) { |
1296 | result = -errno; | |
e428e439 | 1297 | error_setg_errno(errp, -result, "Could not create file"); |
1e37d059 | 1298 | } else { |
4ab15590 CL |
1299 | if (nocow) { |
1300 | #ifdef __linux__ | |
1301 | /* Set NOCOW flag to solve performance issue on fs like btrfs. | |
1302 | * This is an optimisation. The FS_IOC_SETFLAGS ioctl return value | |
1303 | * will be ignored since any failure of this operation should not | |
1304 | * block the left work. | |
1305 | */ | |
1306 | int attr; | |
1307 | if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0) { | |
1308 | attr |= FS_NOCOW_FL; | |
1309 | ioctl(fd, FS_IOC_SETFLAGS, &attr); | |
1310 | } | |
1311 | #endif | |
1312 | } | |
1313 | ||
9040385d | 1314 | if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
1e37d059 | 1315 | result = -errno; |
e428e439 | 1316 | error_setg_errno(errp, -result, "Could not resize file"); |
1e37d059 | 1317 | } |
2e1e79da | 1318 | if (qemu_close(fd) != 0) { |
1e37d059 | 1319 | result = -errno; |
e428e439 | 1320 | error_setg_errno(errp, -result, "Could not close the new file"); |
1e37d059 SW |
1321 | } |
1322 | } | |
1323 | return result; | |
83f64091 FB |
1324 | } |
1325 | ||
4f11aa8a HR |
1326 | static int64_t try_fiemap(BlockDriverState *bs, off_t start, off_t *data, |
1327 | off_t *hole, int nb_sectors, int *pnum) | |
5500316d | 1328 | { |
5500316d | 1329 | #ifdef CONFIG_FIEMAP |
94282e71 | 1330 | BDRVRawState *s = bs->opaque; |
4f11aa8a | 1331 | int64_t ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; |
5500316d PB |
1332 | struct { |
1333 | struct fiemap fm; | |
1334 | struct fiemap_extent fe; | |
1335 | } f; | |
94282e71 | 1336 | |
4f11aa8a HR |
1337 | if (s->skip_fiemap) { |
1338 | return -ENOTSUP; | |
1339 | } | |
1340 | ||
5500316d PB |
1341 | f.fm.fm_start = start; |
1342 | f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE; | |
1343 | f.fm.fm_flags = 0; | |
1344 | f.fm.fm_extent_count = 1; | |
1345 | f.fm.fm_reserved = 0; | |
1346 | if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) { | |
4f11aa8a HR |
1347 | s->skip_fiemap = true; |
1348 | return -errno; | |
5500316d PB |
1349 | } |
1350 | ||
1351 | if (f.fm.fm_mapped_extents == 0) { | |
1352 | /* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length. | |
1353 | * f.fm.fm_start + f.fm.fm_length must be clamped to the file size! | |
1354 | */ | |
1355 | off_t length = lseek(s->fd, 0, SEEK_END); | |
4f11aa8a HR |
1356 | *hole = f.fm.fm_start; |
1357 | *data = MIN(f.fm.fm_start + f.fm.fm_length, length); | |
5500316d | 1358 | } else { |
4f11aa8a HR |
1359 | *data = f.fe.fe_logical; |
1360 | *hole = f.fe.fe_logical + f.fe.fe_length; | |
f5f7abcf PB |
1361 | if (f.fe.fe_flags & FIEMAP_EXTENT_UNWRITTEN) { |
1362 | ret |= BDRV_BLOCK_ZERO; | |
1363 | } | |
5500316d | 1364 | } |
94282e71 | 1365 | |
4f11aa8a HR |
1366 | return ret; |
1367 | #else | |
1368 | return -ENOTSUP; | |
1369 | #endif | |
1370 | } | |
94282e71 | 1371 | |
4f11aa8a HR |
1372 | static int64_t try_seek_hole(BlockDriverState *bs, off_t start, off_t *data, |
1373 | off_t *hole, int *pnum) | |
1374 | { | |
1375 | #if defined SEEK_HOLE && defined SEEK_DATA | |
94282e71 KW |
1376 | BDRVRawState *s = bs->opaque; |
1377 | ||
4f11aa8a HR |
1378 | *hole = lseek(s->fd, start, SEEK_HOLE); |
1379 | if (*hole == -1) { | |
5500316d PB |
1380 | /* -ENXIO indicates that sector_num was past the end of the file. |
1381 | * There is a virtual hole there. */ | |
1382 | assert(errno != -ENXIO); | |
1383 | ||
4f11aa8a | 1384 | return -errno; |
5500316d PB |
1385 | } |
1386 | ||
4f11aa8a HR |
1387 | if (*hole > start) { |
1388 | *data = start; | |
5500316d PB |
1389 | } else { |
1390 | /* On a hole. We need another syscall to find its end. */ | |
4f11aa8a HR |
1391 | *data = lseek(s->fd, start, SEEK_DATA); |
1392 | if (*data == -1) { | |
1393 | *data = lseek(s->fd, 0, SEEK_END); | |
5500316d PB |
1394 | } |
1395 | } | |
4f11aa8a HR |
1396 | |
1397 | return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; | |
5500316d | 1398 | #else |
4f11aa8a | 1399 | return -ENOTSUP; |
5500316d | 1400 | #endif |
4f11aa8a HR |
1401 | } |
1402 | ||
1403 | /* | |
1404 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1405 | * not implementing the functionality are assumed to not support backing files, | |
1406 | * hence all their sectors are reported as allocated. | |
1407 | * | |
1408 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
1409 | * and 'pnum' is set to 0. | |
1410 | * | |
1411 | * 'pnum' is set to the number of sectors (including and immediately following | |
1412 | * the specified sector) that are known to be in the same | |
1413 | * allocated/unallocated state. | |
1414 | * | |
1415 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
1416 | * beyond the end of the disk image it will be clamped. | |
1417 | */ | |
1418 | static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, | |
1419 | int64_t sector_num, | |
1420 | int nb_sectors, int *pnum) | |
1421 | { | |
1422 | off_t start, data = 0, hole = 0; | |
1423 | int64_t ret; | |
1424 | ||
1425 | ret = fd_open(bs); | |
1426 | if (ret < 0) { | |
1427 | return ret; | |
1428 | } | |
1429 | ||
1430 | start = sector_num * BDRV_SECTOR_SIZE; | |
1431 | ||
1432 | ret = try_fiemap(bs, start, &data, &hole, nb_sectors, pnum); | |
1433 | if (ret < 0) { | |
1434 | ret = try_seek_hole(bs, start, &data, &hole, pnum); | |
1435 | if (ret < 0) { | |
1436 | /* Assume everything is allocated. */ | |
1437 | data = 0; | |
1438 | hole = start + nb_sectors * BDRV_SECTOR_SIZE; | |
1439 | ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; | |
1440 | } | |
1441 | } | |
5500316d PB |
1442 | |
1443 | if (data <= start) { | |
1444 | /* On a data extent, compute sectors to the end of the extent. */ | |
1445 | *pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); | |
5500316d PB |
1446 | } else { |
1447 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
1448 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); | |
63390a8d PB |
1449 | ret &= ~BDRV_BLOCK_DATA; |
1450 | ret |= BDRV_BLOCK_ZERO; | |
5500316d | 1451 | } |
63390a8d PB |
1452 | |
1453 | return ret; | |
5500316d PB |
1454 | } |
1455 | ||
8238010b PB |
1456 | static coroutine_fn BlockDriverAIOCB *raw_aio_discard(BlockDriverState *bs, |
1457 | int64_t sector_num, int nb_sectors, | |
1458 | BlockDriverCompletionFunc *cb, void *opaque) | |
dce512de | 1459 | { |
dce512de CH |
1460 | BDRVRawState *s = bs->opaque; |
1461 | ||
8238010b PB |
1462 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, |
1463 | cb, opaque, QEMU_AIO_DISCARD); | |
dce512de | 1464 | } |
0e7e1989 | 1465 | |
260a82e5 PB |
1466 | static int coroutine_fn raw_co_write_zeroes( |
1467 | BlockDriverState *bs, int64_t sector_num, | |
1468 | int nb_sectors, BdrvRequestFlags flags) | |
1469 | { | |
1470 | BDRVRawState *s = bs->opaque; | |
1471 | ||
1472 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1473 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1474 | QEMU_AIO_WRITE_ZEROES); | |
1475 | } else if (s->discard_zeroes) { | |
1476 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1477 | QEMU_AIO_DISCARD); | |
260a82e5 | 1478 | } |
97a2ae34 | 1479 | return -ENOTSUP; |
260a82e5 PB |
1480 | } |
1481 | ||
1482 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
1483 | { | |
1484 | BDRVRawState *s = bs->opaque; | |
1485 | ||
1486 | bdi->unallocated_blocks_are_zero = s->discard_zeroes; | |
1487 | bdi->can_write_zeroes_with_unmap = s->discard_zeroes; | |
1488 | return 0; | |
1489 | } | |
1490 | ||
6f482f74 CL |
1491 | static QemuOptsList raw_create_opts = { |
1492 | .name = "raw-create-opts", | |
1493 | .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), | |
1494 | .desc = { | |
1495 | { | |
1496 | .name = BLOCK_OPT_SIZE, | |
1497 | .type = QEMU_OPT_SIZE, | |
1498 | .help = "Virtual disk size" | |
1499 | }, | |
4ab15590 CL |
1500 | { |
1501 | .name = BLOCK_OPT_NOCOW, | |
1502 | .type = QEMU_OPT_BOOL, | |
1503 | .help = "Turn off copy-on-write (valid only on btrfs)" | |
1504 | }, | |
6f482f74 CL |
1505 | { /* end of list */ } |
1506 | } | |
0e7e1989 KW |
1507 | }; |
1508 | ||
84a12e66 CH |
1509 | static BlockDriver bdrv_file = { |
1510 | .format_name = "file", | |
1511 | .protocol_name = "file", | |
856ae5c3 | 1512 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1513 | .bdrv_needs_filename = true, |
856ae5c3 | 1514 | .bdrv_probe = NULL, /* no probe for protocols */ |
078896a9 | 1515 | .bdrv_parse_filename = raw_parse_filename, |
66f82cee | 1516 | .bdrv_file_open = raw_open, |
eeb6b45d JC |
1517 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1518 | .bdrv_reopen_commit = raw_reopen_commit, | |
1519 | .bdrv_reopen_abort = raw_reopen_abort, | |
856ae5c3 | 1520 | .bdrv_close = raw_close, |
c282e1fd | 1521 | .bdrv_create = raw_create, |
3ac21627 | 1522 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
b6b8a333 | 1523 | .bdrv_co_get_block_status = raw_co_get_block_status, |
260a82e5 | 1524 | .bdrv_co_write_zeroes = raw_co_write_zeroes, |
3b46e624 | 1525 | |
f141eafe AL |
1526 | .bdrv_aio_readv = raw_aio_readv, |
1527 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1528 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 1529 | .bdrv_aio_discard = raw_aio_discard, |
c25f53b0 | 1530 | .bdrv_refresh_limits = raw_refresh_limits, |
3c529d93 | 1531 | |
83f64091 FB |
1532 | .bdrv_truncate = raw_truncate, |
1533 | .bdrv_getlength = raw_getlength, | |
260a82e5 | 1534 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1535 | .bdrv_get_allocated_file_size |
1536 | = raw_get_allocated_file_size, | |
0e7e1989 | 1537 | |
c2f3426c SH |
1538 | .bdrv_detach_aio_context = raw_detach_aio_context, |
1539 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
1540 | ||
6f482f74 | 1541 | .create_opts = &raw_create_opts, |
83f64091 FB |
1542 | }; |
1543 | ||
19cb3738 FB |
1544 | /***********************************************/ |
1545 | /* host device */ | |
1546 | ||
83affaa6 | 1547 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1548 | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); |
1549 | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); | |
1550 | ||
1551 | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) | |
1552 | { | |
5fafdf24 | 1553 | kern_return_t kernResult; |
19cb3738 FB |
1554 | mach_port_t masterPort; |
1555 | CFMutableDictionaryRef classesToMatch; | |
1556 | ||
1557 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
1558 | if ( KERN_SUCCESS != kernResult ) { | |
1559 | printf( "IOMasterPort returned %d\n", kernResult ); | |
1560 | } | |
3b46e624 | 1561 | |
5fafdf24 | 1562 | classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
19cb3738 FB |
1563 | if ( classesToMatch == NULL ) { |
1564 | printf( "IOServiceMatching returned a NULL dictionary.\n" ); | |
1565 | } else { | |
1566 | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); | |
1567 | } | |
1568 | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); | |
1569 | if ( KERN_SUCCESS != kernResult ) | |
1570 | { | |
1571 | printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); | |
1572 | } | |
3b46e624 | 1573 | |
19cb3738 FB |
1574 | return kernResult; |
1575 | } | |
1576 | ||
1577 | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) | |
1578 | { | |
1579 | io_object_t nextMedia; | |
1580 | kern_return_t kernResult = KERN_FAILURE; | |
1581 | *bsdPath = '\0'; | |
1582 | nextMedia = IOIteratorNext( mediaIterator ); | |
1583 | if ( nextMedia ) | |
1584 | { | |
1585 | CFTypeRef bsdPathAsCFString; | |
1586 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
1587 | if ( bsdPathAsCFString ) { | |
1588 | size_t devPathLength; | |
1589 | strcpy( bsdPath, _PATH_DEV ); | |
1590 | strcat( bsdPath, "r" ); | |
1591 | devPathLength = strlen( bsdPath ); | |
1592 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
1593 | kernResult = KERN_SUCCESS; | |
1594 | } | |
1595 | CFRelease( bsdPathAsCFString ); | |
1596 | } | |
1597 | IOObjectRelease( nextMedia ); | |
1598 | } | |
3b46e624 | 1599 | |
19cb3738 FB |
1600 | return kernResult; |
1601 | } | |
1602 | ||
1603 | #endif | |
1604 | ||
508c7cb3 CH |
1605 | static int hdev_probe_device(const char *filename) |
1606 | { | |
1607 | struct stat st; | |
1608 | ||
1609 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
1610 | if (strstart(filename, "/dev/cdrom", NULL)) | |
1611 | return 50; | |
1612 | ||
1613 | if (stat(filename, &st) >= 0 && | |
1614 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
1615 | return 100; | |
1616 | } | |
1617 | ||
1618 | return 0; | |
1619 | } | |
1620 | ||
da888d37 SH |
1621 | static int check_hdev_writable(BDRVRawState *s) |
1622 | { | |
1623 | #if defined(BLKROGET) | |
1624 | /* Linux block devices can be configured "read-only" using blockdev(8). | |
1625 | * This is independent of device node permissions and therefore open(2) | |
1626 | * with O_RDWR succeeds. Actual writes fail with EPERM. | |
1627 | * | |
1628 | * bdrv_open() is supposed to fail if the disk is read-only. Explicitly | |
1629 | * check for read-only block devices so that Linux block devices behave | |
1630 | * properly. | |
1631 | */ | |
1632 | struct stat st; | |
1633 | int readonly = 0; | |
1634 | ||
1635 | if (fstat(s->fd, &st)) { | |
1636 | return -errno; | |
1637 | } | |
1638 | ||
1639 | if (!S_ISBLK(st.st_mode)) { | |
1640 | return 0; | |
1641 | } | |
1642 | ||
1643 | if (ioctl(s->fd, BLKROGET, &readonly) < 0) { | |
1644 | return -errno; | |
1645 | } | |
1646 | ||
1647 | if (readonly) { | |
1648 | return -EACCES; | |
1649 | } | |
1650 | #endif /* defined(BLKROGET) */ | |
1651 | return 0; | |
1652 | } | |
1653 | ||
7af803d4 HR |
1654 | static void hdev_parse_filename(const char *filename, QDict *options, |
1655 | Error **errp) | |
1656 | { | |
1657 | /* The prefix is optional, just as for "file". */ | |
1658 | strstart(filename, "host_device:", &filename); | |
1659 | ||
1660 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
1661 | } | |
1662 | ||
015a1036 HR |
1663 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
1664 | Error **errp) | |
19cb3738 FB |
1665 | { |
1666 | BDRVRawState *s = bs->opaque; | |
e428e439 | 1667 | Error *local_err = NULL; |
da888d37 | 1668 | int ret; |
c66a6157 | 1669 | const char *filename = qdict_get_str(options, "filename"); |
a76bab49 | 1670 | |
83affaa6 | 1671 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1672 | if (strstart(filename, "/dev/cdrom", NULL)) { |
1673 | kern_return_t kernResult; | |
1674 | io_iterator_t mediaIterator; | |
1675 | char bsdPath[ MAXPATHLEN ]; | |
1676 | int fd; | |
5fafdf24 | 1677 | |
19cb3738 FB |
1678 | kernResult = FindEjectableCDMedia( &mediaIterator ); |
1679 | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); | |
3b46e624 | 1680 | |
19cb3738 FB |
1681 | if ( bsdPath[ 0 ] != '\0' ) { |
1682 | strcat(bsdPath,"s0"); | |
1683 | /* some CDs don't have a partition 0 */ | |
6165f4d8 | 1684 | fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
19cb3738 FB |
1685 | if (fd < 0) { |
1686 | bsdPath[strlen(bsdPath)-1] = '1'; | |
1687 | } else { | |
2e1e79da | 1688 | qemu_close(fd); |
19cb3738 FB |
1689 | } |
1690 | filename = bsdPath; | |
a5c5ea3f | 1691 | qdict_put(options, "filename", qstring_from_str(filename)); |
19cb3738 | 1692 | } |
3b46e624 | 1693 | |
19cb3738 FB |
1694 | if ( mediaIterator ) |
1695 | IOObjectRelease( mediaIterator ); | |
1696 | } | |
1697 | #endif | |
19cb3738 FB |
1698 | |
1699 | s->type = FTYPE_FILE; | |
4dd75c70 | 1700 | #if defined(__linux__) |
05acda4d BK |
1701 | { |
1702 | char resolved_path[ MAXPATHLEN ], *temp; | |
1703 | ||
1704 | temp = realpath(filename, resolved_path); | |
1705 | if (temp && strstart(temp, "/dev/sg", NULL)) { | |
1706 | bs->sg = 1; | |
1707 | } | |
19cb3738 FB |
1708 | } |
1709 | #endif | |
90babde0 | 1710 | |
e428e439 | 1711 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
da888d37 | 1712 | if (ret < 0) { |
84d18f06 | 1713 | if (local_err) { |
e428e439 HR |
1714 | error_propagate(errp, local_err); |
1715 | } | |
da888d37 SH |
1716 | return ret; |
1717 | } | |
1718 | ||
1719 | if (flags & BDRV_O_RDWR) { | |
1720 | ret = check_hdev_writable(s); | |
1721 | if (ret < 0) { | |
1722 | raw_close(bs); | |
e428e439 | 1723 | error_setg_errno(errp, -ret, "The device is not writable"); |
da888d37 SH |
1724 | return ret; |
1725 | } | |
1726 | } | |
1727 | ||
1728 | return ret; | |
19cb3738 FB |
1729 | } |
1730 | ||
03ff3ca3 | 1731 | #if defined(__linux__) |
19cb3738 FB |
1732 | /* Note: we do not have a reliable method to detect if the floppy is |
1733 | present. The current method is to try to open the floppy at every | |
1734 | I/O and to keep it opened during a few hundreds of ms. */ | |
1735 | static int fd_open(BlockDriverState *bs) | |
1736 | { | |
1737 | BDRVRawState *s = bs->opaque; | |
1738 | int last_media_present; | |
1739 | ||
1740 | if (s->type != FTYPE_FD) | |
1741 | return 0; | |
1742 | last_media_present = (s->fd >= 0); | |
5fafdf24 | 1743 | if (s->fd >= 0 && |
c57c846a | 1744 | (get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
2e1e79da | 1745 | qemu_close(s->fd); |
19cb3738 FB |
1746 | s->fd = -1; |
1747 | #ifdef DEBUG_FLOPPY | |
1748 | printf("Floppy closed\n"); | |
1749 | #endif | |
1750 | } | |
1751 | if (s->fd < 0) { | |
5fafdf24 | 1752 | if (s->fd_got_error && |
c57c846a | 1753 | (get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
19cb3738 FB |
1754 | #ifdef DEBUG_FLOPPY |
1755 | printf("No floppy (open delayed)\n"); | |
1756 | #endif | |
1757 | return -EIO; | |
1758 | } | |
6165f4d8 | 1759 | s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK); |
19cb3738 | 1760 | if (s->fd < 0) { |
c57c846a | 1761 | s->fd_error_time = get_clock(); |
19cb3738 FB |
1762 | s->fd_got_error = 1; |
1763 | if (last_media_present) | |
1764 | s->fd_media_changed = 1; | |
1765 | #ifdef DEBUG_FLOPPY | |
1766 | printf("No floppy\n"); | |
1767 | #endif | |
1768 | return -EIO; | |
1769 | } | |
1770 | #ifdef DEBUG_FLOPPY | |
1771 | printf("Floppy opened\n"); | |
1772 | #endif | |
1773 | } | |
1774 | if (!last_media_present) | |
1775 | s->fd_media_changed = 1; | |
c57c846a | 1776 | s->fd_open_time = get_clock(); |
19cb3738 FB |
1777 | s->fd_got_error = 0; |
1778 | return 0; | |
1779 | } | |
19cb3738 | 1780 | |
63ec93db | 1781 | static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
985a03b0 TS |
1782 | { |
1783 | BDRVRawState *s = bs->opaque; | |
1784 | ||
1785 | return ioctl(s->fd, req, buf); | |
1786 | } | |
221f715d | 1787 | |
63ec93db | 1788 | static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
221f715d AL |
1789 | unsigned long int req, void *buf, |
1790 | BlockDriverCompletionFunc *cb, void *opaque) | |
1791 | { | |
f141eafe | 1792 | BDRVRawState *s = bs->opaque; |
c208e8c2 | 1793 | RawPosixAIOData *acb; |
c4d9d196 | 1794 | ThreadPool *pool; |
221f715d | 1795 | |
f141eafe AL |
1796 | if (fd_open(bs) < 0) |
1797 | return NULL; | |
c208e8c2 PB |
1798 | |
1799 | acb = g_slice_new(RawPosixAIOData); | |
1800 | acb->bs = bs; | |
1801 | acb->aio_type = QEMU_AIO_IOCTL; | |
1802 | acb->aio_fildes = s->fd; | |
1803 | acb->aio_offset = 0; | |
1804 | acb->aio_ioctl_buf = buf; | |
1805 | acb->aio_ioctl_cmd = req; | |
c4d9d196 SH |
1806 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1807 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
221f715d AL |
1808 | } |
1809 | ||
a167ba50 | 1810 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1811 | static int fd_open(BlockDriverState *bs) |
1812 | { | |
1813 | BDRVRawState *s = bs->opaque; | |
1814 | ||
1815 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
1816 | if (s->fd >= 0) | |
1817 | return 0; | |
1818 | return -EIO; | |
1819 | } | |
9f23011a | 1820 | #else /* !linux && !FreeBSD */ |
19cb3738 | 1821 | |
08af02e2 AL |
1822 | static int fd_open(BlockDriverState *bs) |
1823 | { | |
1824 | return 0; | |
1825 | } | |
1826 | ||
221f715d | 1827 | #endif /* !linux && !FreeBSD */ |
04eeb8b6 | 1828 | |
c36dd8a0 AF |
1829 | static coroutine_fn BlockDriverAIOCB *hdev_aio_discard(BlockDriverState *bs, |
1830 | int64_t sector_num, int nb_sectors, | |
1831 | BlockDriverCompletionFunc *cb, void *opaque) | |
1832 | { | |
1833 | BDRVRawState *s = bs->opaque; | |
1834 | ||
1835 | if (fd_open(bs) < 0) { | |
1836 | return NULL; | |
1837 | } | |
1838 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, | |
1839 | cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
1840 | } | |
1841 | ||
d0b4503e PB |
1842 | static coroutine_fn int hdev_co_write_zeroes(BlockDriverState *bs, |
1843 | int64_t sector_num, int nb_sectors, BdrvRequestFlags flags) | |
1844 | { | |
1845 | BDRVRawState *s = bs->opaque; | |
1846 | int rc; | |
1847 | ||
1848 | rc = fd_open(bs); | |
1849 | if (rc < 0) { | |
1850 | return rc; | |
1851 | } | |
1852 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1853 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1854 | QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV); | |
1855 | } else if (s->discard_zeroes) { | |
1856 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1857 | QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
d0b4503e | 1858 | } |
97a2ae34 | 1859 | return -ENOTSUP; |
d0b4503e PB |
1860 | } |
1861 | ||
6f482f74 | 1862 | static int hdev_create(const char *filename, QemuOpts *opts, |
d5124c00 | 1863 | Error **errp) |
93c65b47 AL |
1864 | { |
1865 | int fd; | |
1866 | int ret = 0; | |
1867 | struct stat stat_buf; | |
0e7e1989 | 1868 | int64_t total_size = 0; |
cc28c6aa HR |
1869 | bool has_prefix; |
1870 | ||
1871 | /* This function is used by all three protocol block drivers and therefore | |
1872 | * any of these three prefixes may be given. | |
1873 | * The return value has to be stored somewhere, otherwise this is an error | |
1874 | * due to -Werror=unused-value. */ | |
1875 | has_prefix = | |
1876 | strstart(filename, "host_device:", &filename) || | |
1877 | strstart(filename, "host_cdrom:" , &filename) || | |
1878 | strstart(filename, "host_floppy:", &filename); | |
1879 | ||
1880 | (void)has_prefix; | |
93c65b47 | 1881 | |
0e7e1989 | 1882 | /* Read out options */ |
6f482f74 CL |
1883 | total_size = |
1884 | qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE; | |
93c65b47 | 1885 | |
6165f4d8 | 1886 | fd = qemu_open(filename, O_WRONLY | O_BINARY); |
e428e439 HR |
1887 | if (fd < 0) { |
1888 | ret = -errno; | |
1889 | error_setg_errno(errp, -ret, "Could not open device"); | |
1890 | return ret; | |
1891 | } | |
93c65b47 | 1892 | |
e428e439 | 1893 | if (fstat(fd, &stat_buf) < 0) { |
57e69b7d | 1894 | ret = -errno; |
e428e439 HR |
1895 | error_setg_errno(errp, -ret, "Could not stat device"); |
1896 | } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) { | |
1897 | error_setg(errp, | |
1898 | "The given file is neither a block nor a character device"); | |
57e69b7d | 1899 | ret = -ENODEV; |
e428e439 HR |
1900 | } else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) { |
1901 | error_setg(errp, "Device is too small"); | |
93c65b47 | 1902 | ret = -ENOSPC; |
e428e439 | 1903 | } |
93c65b47 | 1904 | |
2e1e79da | 1905 | qemu_close(fd); |
93c65b47 AL |
1906 | return ret; |
1907 | } | |
1908 | ||
5efa9d5a | 1909 | static BlockDriver bdrv_host_device = { |
0b4ce02e | 1910 | .format_name = "host_device", |
84a12e66 | 1911 | .protocol_name = "host_device", |
0b4ce02e | 1912 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1913 | .bdrv_needs_filename = true, |
0b4ce02e | 1914 | .bdrv_probe_device = hdev_probe_device, |
7af803d4 | 1915 | .bdrv_parse_filename = hdev_parse_filename, |
66f82cee | 1916 | .bdrv_file_open = hdev_open, |
0b4ce02e | 1917 | .bdrv_close = raw_close, |
1bc6b705 JC |
1918 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1919 | .bdrv_reopen_commit = raw_reopen_commit, | |
1920 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 1921 | .bdrv_create = hdev_create, |
6f482f74 | 1922 | .create_opts = &raw_create_opts, |
d0b4503e | 1923 | .bdrv_co_write_zeroes = hdev_co_write_zeroes, |
3b46e624 | 1924 | |
f141eafe AL |
1925 | .bdrv_aio_readv = raw_aio_readv, |
1926 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1927 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 1928 | .bdrv_aio_discard = hdev_aio_discard, |
c25f53b0 | 1929 | .bdrv_refresh_limits = raw_refresh_limits, |
3c529d93 | 1930 | |
55b949c8 | 1931 | .bdrv_truncate = raw_truncate, |
e60f469c | 1932 | .bdrv_getlength = raw_getlength, |
260a82e5 | 1933 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1934 | .bdrv_get_allocated_file_size |
1935 | = raw_get_allocated_file_size, | |
19cb3738 | 1936 | |
c2f3426c SH |
1937 | .bdrv_detach_aio_context = raw_detach_aio_context, |
1938 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
1939 | ||
f3a5d3f8 | 1940 | /* generic scsi device */ |
63ec93db CH |
1941 | #ifdef __linux__ |
1942 | .bdrv_ioctl = hdev_ioctl, | |
63ec93db CH |
1943 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
1944 | #endif | |
f3a5d3f8 CH |
1945 | }; |
1946 | ||
1947 | #ifdef __linux__ | |
d3f49845 HR |
1948 | static void floppy_parse_filename(const char *filename, QDict *options, |
1949 | Error **errp) | |
1950 | { | |
1951 | /* The prefix is optional, just as for "file". */ | |
1952 | strstart(filename, "host_floppy:", &filename); | |
1953 | ||
1954 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
1955 | } | |
1956 | ||
015a1036 HR |
1957 | static int floppy_open(BlockDriverState *bs, QDict *options, int flags, |
1958 | Error **errp) | |
f3a5d3f8 CH |
1959 | { |
1960 | BDRVRawState *s = bs->opaque; | |
e428e439 | 1961 | Error *local_err = NULL; |
f3a5d3f8 CH |
1962 | int ret; |
1963 | ||
f3a5d3f8 | 1964 | s->type = FTYPE_FD; |
f3a5d3f8 | 1965 | |
19a3da7f | 1966 | /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ |
e428e439 HR |
1967 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
1968 | if (ret) { | |
84d18f06 | 1969 | if (local_err) { |
e428e439 HR |
1970 | error_propagate(errp, local_err); |
1971 | } | |
f3a5d3f8 | 1972 | return ret; |
e428e439 | 1973 | } |
f3a5d3f8 CH |
1974 | |
1975 | /* close fd so that we can reopen it as needed */ | |
2e1e79da | 1976 | qemu_close(s->fd); |
f3a5d3f8 CH |
1977 | s->fd = -1; |
1978 | s->fd_media_changed = 1; | |
1979 | ||
1980 | return 0; | |
1981 | } | |
1982 | ||
508c7cb3 CH |
1983 | static int floppy_probe_device(const char *filename) |
1984 | { | |
2ebf7c4b CR |
1985 | int fd, ret; |
1986 | int prio = 0; | |
1987 | struct floppy_struct fdparam; | |
343f8568 | 1988 | struct stat st; |
2ebf7c4b | 1989 | |
e1740828 CB |
1990 | if (strstart(filename, "/dev/fd", NULL) && |
1991 | !strstart(filename, "/dev/fdset/", NULL)) { | |
2ebf7c4b | 1992 | prio = 50; |
e1740828 | 1993 | } |
2ebf7c4b | 1994 | |
6165f4d8 | 1995 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
2ebf7c4b CR |
1996 | if (fd < 0) { |
1997 | goto out; | |
1998 | } | |
343f8568 JS |
1999 | ret = fstat(fd, &st); |
2000 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
2001 | goto outc; | |
2002 | } | |
2ebf7c4b CR |
2003 | |
2004 | /* Attempt to detect via a floppy specific ioctl */ | |
2005 | ret = ioctl(fd, FDGETPRM, &fdparam); | |
2006 | if (ret >= 0) | |
2007 | prio = 100; | |
2008 | ||
343f8568 | 2009 | outc: |
2e1e79da | 2010 | qemu_close(fd); |
2ebf7c4b CR |
2011 | out: |
2012 | return prio; | |
508c7cb3 CH |
2013 | } |
2014 | ||
2015 | ||
f3a5d3f8 CH |
2016 | static int floppy_is_inserted(BlockDriverState *bs) |
2017 | { | |
2018 | return fd_open(bs) >= 0; | |
2019 | } | |
2020 | ||
2021 | static int floppy_media_changed(BlockDriverState *bs) | |
2022 | { | |
2023 | BDRVRawState *s = bs->opaque; | |
2024 | int ret; | |
2025 | ||
2026 | /* | |
2027 | * XXX: we do not have a true media changed indication. | |
2028 | * It does not work if the floppy is changed without trying to read it. | |
2029 | */ | |
2030 | fd_open(bs); | |
2031 | ret = s->fd_media_changed; | |
2032 | s->fd_media_changed = 0; | |
2033 | #ifdef DEBUG_FLOPPY | |
2034 | printf("Floppy changed=%d\n", ret); | |
2035 | #endif | |
2036 | return ret; | |
2037 | } | |
2038 | ||
f36f3949 | 2039 | static void floppy_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2040 | { |
2041 | BDRVRawState *s = bs->opaque; | |
2042 | int fd; | |
2043 | ||
2044 | if (s->fd >= 0) { | |
2e1e79da | 2045 | qemu_close(s->fd); |
f3a5d3f8 CH |
2046 | s->fd = -1; |
2047 | } | |
6165f4d8 | 2048 | fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK); |
f3a5d3f8 CH |
2049 | if (fd >= 0) { |
2050 | if (ioctl(fd, FDEJECT, 0) < 0) | |
2051 | perror("FDEJECT"); | |
2e1e79da | 2052 | qemu_close(fd); |
f3a5d3f8 | 2053 | } |
f3a5d3f8 CH |
2054 | } |
2055 | ||
2056 | static BlockDriver bdrv_host_floppy = { | |
2057 | .format_name = "host_floppy", | |
84a12e66 | 2058 | .protocol_name = "host_floppy", |
f3a5d3f8 | 2059 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2060 | .bdrv_needs_filename = true, |
508c7cb3 | 2061 | .bdrv_probe_device = floppy_probe_device, |
d3f49845 | 2062 | .bdrv_parse_filename = floppy_parse_filename, |
66f82cee | 2063 | .bdrv_file_open = floppy_open, |
f3a5d3f8 | 2064 | .bdrv_close = raw_close, |
1bc6b705 JC |
2065 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2066 | .bdrv_reopen_commit = raw_reopen_commit, | |
2067 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2068 | .bdrv_create = hdev_create, |
6f482f74 | 2069 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2070 | |
f3a5d3f8 CH |
2071 | .bdrv_aio_readv = raw_aio_readv, |
2072 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2073 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2074 | .bdrv_refresh_limits = raw_refresh_limits, |
f3a5d3f8 | 2075 | |
55b949c8 | 2076 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2077 | .bdrv_getlength = raw_getlength, |
2078 | .has_variable_length = true, | |
4a1d5e1f FZ |
2079 | .bdrv_get_allocated_file_size |
2080 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2081 | |
c2f3426c SH |
2082 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2083 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2084 | ||
f3a5d3f8 CH |
2085 | /* removable device support */ |
2086 | .bdrv_is_inserted = floppy_is_inserted, | |
2087 | .bdrv_media_changed = floppy_media_changed, | |
2088 | .bdrv_eject = floppy_eject, | |
f3a5d3f8 | 2089 | }; |
18fa1c42 | 2090 | #endif |
f3a5d3f8 | 2091 | |
18fa1c42 HR |
2092 | #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
2093 | static void cdrom_parse_filename(const char *filename, QDict *options, | |
2094 | Error **errp) | |
2095 | { | |
2096 | /* The prefix is optional, just as for "file". */ | |
2097 | strstart(filename, "host_cdrom:", &filename); | |
2098 | ||
2099 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
2100 | } | |
2101 | #endif | |
2102 | ||
2103 | #ifdef __linux__ | |
015a1036 HR |
2104 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2105 | Error **errp) | |
f3a5d3f8 CH |
2106 | { |
2107 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
2108 | Error *local_err = NULL; |
2109 | int ret; | |
f3a5d3f8 | 2110 | |
f3a5d3f8 CH |
2111 | s->type = FTYPE_CD; |
2112 | ||
19a3da7f | 2113 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
e428e439 | 2114 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
84d18f06 | 2115 | if (local_err) { |
e428e439 HR |
2116 | error_propagate(errp, local_err); |
2117 | } | |
2118 | return ret; | |
f3a5d3f8 CH |
2119 | } |
2120 | ||
508c7cb3 CH |
2121 | static int cdrom_probe_device(const char *filename) |
2122 | { | |
3baf720e CR |
2123 | int fd, ret; |
2124 | int prio = 0; | |
343f8568 | 2125 | struct stat st; |
3baf720e | 2126 | |
6165f4d8 | 2127 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
3baf720e CR |
2128 | if (fd < 0) { |
2129 | goto out; | |
2130 | } | |
343f8568 JS |
2131 | ret = fstat(fd, &st); |
2132 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
2133 | goto outc; | |
2134 | } | |
3baf720e CR |
2135 | |
2136 | /* Attempt to detect via a CDROM specific ioctl */ | |
2137 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2138 | if (ret >= 0) | |
2139 | prio = 100; | |
2140 | ||
343f8568 | 2141 | outc: |
2e1e79da | 2142 | qemu_close(fd); |
3baf720e CR |
2143 | out: |
2144 | return prio; | |
508c7cb3 CH |
2145 | } |
2146 | ||
f3a5d3f8 CH |
2147 | static int cdrom_is_inserted(BlockDriverState *bs) |
2148 | { | |
2149 | BDRVRawState *s = bs->opaque; | |
2150 | int ret; | |
2151 | ||
2152 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2153 | if (ret == CDS_DISC_OK) | |
2154 | return 1; | |
2155 | return 0; | |
2156 | } | |
2157 | ||
f36f3949 | 2158 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2159 | { |
2160 | BDRVRawState *s = bs->opaque; | |
2161 | ||
2162 | if (eject_flag) { | |
2163 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
2164 | perror("CDROMEJECT"); | |
2165 | } else { | |
2166 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
2167 | perror("CDROMEJECT"); | |
2168 | } | |
f3a5d3f8 CH |
2169 | } |
2170 | ||
025e849a | 2171 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2172 | { |
2173 | BDRVRawState *s = bs->opaque; | |
2174 | ||
2175 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
2176 | /* | |
2177 | * Note: an error can happen if the distribution automatically | |
2178 | * mounts the CD-ROM | |
2179 | */ | |
2180 | /* perror("CDROM_LOCKDOOR"); */ | |
2181 | } | |
f3a5d3f8 CH |
2182 | } |
2183 | ||
2184 | static BlockDriver bdrv_host_cdrom = { | |
2185 | .format_name = "host_cdrom", | |
84a12e66 | 2186 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2187 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2188 | .bdrv_needs_filename = true, |
508c7cb3 | 2189 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2190 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2191 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2192 | .bdrv_close = raw_close, |
1bc6b705 JC |
2193 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2194 | .bdrv_reopen_commit = raw_reopen_commit, | |
2195 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2196 | .bdrv_create = hdev_create, |
6f482f74 | 2197 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2198 | |
f3a5d3f8 CH |
2199 | .bdrv_aio_readv = raw_aio_readv, |
2200 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2201 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2202 | .bdrv_refresh_limits = raw_refresh_limits, |
f3a5d3f8 | 2203 | |
55b949c8 | 2204 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2205 | .bdrv_getlength = raw_getlength, |
2206 | .has_variable_length = true, | |
4a1d5e1f FZ |
2207 | .bdrv_get_allocated_file_size |
2208 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2209 | |
c2f3426c SH |
2210 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2211 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2212 | ||
f3a5d3f8 CH |
2213 | /* removable device support */ |
2214 | .bdrv_is_inserted = cdrom_is_inserted, | |
2215 | .bdrv_eject = cdrom_eject, | |
025e849a | 2216 | .bdrv_lock_medium = cdrom_lock_medium, |
f3a5d3f8 CH |
2217 | |
2218 | /* generic scsi device */ | |
63ec93db | 2219 | .bdrv_ioctl = hdev_ioctl, |
63ec93db | 2220 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
f3a5d3f8 CH |
2221 | }; |
2222 | #endif /* __linux__ */ | |
2223 | ||
a167ba50 | 2224 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
511018e4 AT |
2225 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2226 | Error **errp) | |
f3a5d3f8 CH |
2227 | { |
2228 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2229 | Error *local_err = NULL; |
f3a5d3f8 CH |
2230 | int ret; |
2231 | ||
2232 | s->type = FTYPE_CD; | |
2233 | ||
e428e439 HR |
2234 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
2235 | if (ret) { | |
84d18f06 | 2236 | if (local_err) { |
e428e439 HR |
2237 | error_propagate(errp, local_err); |
2238 | } | |
f3a5d3f8 | 2239 | return ret; |
e428e439 | 2240 | } |
f3a5d3f8 | 2241 | |
9b2260cb | 2242 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2243 | ioctl(s->fd, CDIOCALLOW); |
2244 | return 0; | |
2245 | } | |
2246 | ||
508c7cb3 CH |
2247 | static int cdrom_probe_device(const char *filename) |
2248 | { | |
2249 | if (strstart(filename, "/dev/cd", NULL) || | |
2250 | strstart(filename, "/dev/acd", NULL)) | |
2251 | return 100; | |
2252 | return 0; | |
2253 | } | |
2254 | ||
f3a5d3f8 CH |
2255 | static int cdrom_reopen(BlockDriverState *bs) |
2256 | { | |
2257 | BDRVRawState *s = bs->opaque; | |
2258 | int fd; | |
2259 | ||
2260 | /* | |
2261 | * Force reread of possibly changed/newly loaded disc, | |
2262 | * FreeBSD seems to not notice sometimes... | |
2263 | */ | |
2264 | if (s->fd >= 0) | |
2e1e79da | 2265 | qemu_close(s->fd); |
6165f4d8 | 2266 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
f3a5d3f8 CH |
2267 | if (fd < 0) { |
2268 | s->fd = -1; | |
2269 | return -EIO; | |
2270 | } | |
2271 | s->fd = fd; | |
2272 | ||
9b2260cb | 2273 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2274 | ioctl(s->fd, CDIOCALLOW); |
2275 | return 0; | |
2276 | } | |
2277 | ||
2278 | static int cdrom_is_inserted(BlockDriverState *bs) | |
2279 | { | |
2280 | return raw_getlength(bs) > 0; | |
2281 | } | |
2282 | ||
f36f3949 | 2283 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2284 | { |
2285 | BDRVRawState *s = bs->opaque; | |
2286 | ||
2287 | if (s->fd < 0) | |
822e1cd1 | 2288 | return; |
f3a5d3f8 CH |
2289 | |
2290 | (void) ioctl(s->fd, CDIOCALLOW); | |
2291 | ||
2292 | if (eject_flag) { | |
2293 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
2294 | perror("CDIOCEJECT"); | |
2295 | } else { | |
2296 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
2297 | perror("CDIOCCLOSE"); | |
2298 | } | |
2299 | ||
822e1cd1 | 2300 | cdrom_reopen(bs); |
f3a5d3f8 CH |
2301 | } |
2302 | ||
025e849a | 2303 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2304 | { |
2305 | BDRVRawState *s = bs->opaque; | |
2306 | ||
2307 | if (s->fd < 0) | |
7bf37fed | 2308 | return; |
f3a5d3f8 CH |
2309 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
2310 | /* | |
2311 | * Note: an error can happen if the distribution automatically | |
2312 | * mounts the CD-ROM | |
2313 | */ | |
2314 | /* perror("CDROM_LOCKDOOR"); */ | |
2315 | } | |
f3a5d3f8 CH |
2316 | } |
2317 | ||
2318 | static BlockDriver bdrv_host_cdrom = { | |
2319 | .format_name = "host_cdrom", | |
84a12e66 | 2320 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2321 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2322 | .bdrv_needs_filename = true, |
508c7cb3 | 2323 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2324 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2325 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2326 | .bdrv_close = raw_close, |
1bc6b705 JC |
2327 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2328 | .bdrv_reopen_commit = raw_reopen_commit, | |
2329 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2330 | .bdrv_create = hdev_create, |
6f482f74 | 2331 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2332 | |
f3a5d3f8 CH |
2333 | .bdrv_aio_readv = raw_aio_readv, |
2334 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2335 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2336 | .bdrv_refresh_limits = raw_refresh_limits, |
f3a5d3f8 | 2337 | |
55b949c8 | 2338 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2339 | .bdrv_getlength = raw_getlength, |
2340 | .has_variable_length = true, | |
4a1d5e1f FZ |
2341 | .bdrv_get_allocated_file_size |
2342 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2343 | |
c2f3426c SH |
2344 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2345 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2346 | ||
19cb3738 | 2347 | /* removable device support */ |
f3a5d3f8 CH |
2348 | .bdrv_is_inserted = cdrom_is_inserted, |
2349 | .bdrv_eject = cdrom_eject, | |
025e849a | 2350 | .bdrv_lock_medium = cdrom_lock_medium, |
19cb3738 | 2351 | }; |
f3a5d3f8 | 2352 | #endif /* __FreeBSD__ */ |
5efa9d5a | 2353 | |
84a12e66 | 2354 | static void bdrv_file_init(void) |
5efa9d5a | 2355 | { |
508c7cb3 CH |
2356 | /* |
2357 | * Register all the drivers. Note that order is important, the driver | |
2358 | * registered last will get probed first. | |
2359 | */ | |
84a12e66 | 2360 | bdrv_register(&bdrv_file); |
5efa9d5a | 2361 | bdrv_register(&bdrv_host_device); |
f3a5d3f8 CH |
2362 | #ifdef __linux__ |
2363 | bdrv_register(&bdrv_host_floppy); | |
2364 | bdrv_register(&bdrv_host_cdrom); | |
2365 | #endif | |
a167ba50 | 2366 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
2367 | bdrv_register(&bdrv_host_cdrom); |
2368 | #endif | |
5efa9d5a AL |
2369 | } |
2370 | ||
84a12e66 | 2371 | block_init(bdrv_file_init); |