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Commit | Line | Data |
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83f64091 | 1 | /* |
223d4670 | 2 | * Block driver for RAW files (posix) |
5fafdf24 | 3 | * |
83f64091 | 4 | * Copyright (c) 2006 Fabrice Bellard |
5fafdf24 | 5 | * |
83f64091 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
faf07963 | 24 | #include "qemu-common.h" |
1de7afc9 PB |
25 | #include "qemu/timer.h" |
26 | #include "qemu/log.h" | |
737e150e | 27 | #include "block/block_int.h" |
1de7afc9 | 28 | #include "qemu/module.h" |
de81a169 | 29 | #include "trace.h" |
737e150e | 30 | #include "block/thread-pool.h" |
1de7afc9 | 31 | #include "qemu/iov.h" |
9f8540ec | 32 | #include "raw-aio.h" |
83f64091 | 33 | |
83affaa6 | 34 | #if defined(__APPLE__) && (__MACH__) |
83f64091 FB |
35 | #include <paths.h> |
36 | #include <sys/param.h> | |
37 | #include <IOKit/IOKitLib.h> | |
38 | #include <IOKit/IOBSD.h> | |
39 | #include <IOKit/storage/IOMediaBSDClient.h> | |
40 | #include <IOKit/storage/IOMedia.h> | |
41 | #include <IOKit/storage/IOCDMedia.h> | |
42 | //#include <IOKit/storage/IOCDTypes.h> | |
43 | #include <CoreFoundation/CoreFoundation.h> | |
44 | #endif | |
45 | ||
46 | #ifdef __sun__ | |
2e9671da | 47 | #define _POSIX_PTHREAD_SEMANTICS 1 |
83f64091 FB |
48 | #include <sys/dkio.h> |
49 | #endif | |
19cb3738 | 50 | #ifdef __linux__ |
343f8568 JS |
51 | #include <sys/types.h> |
52 | #include <sys/stat.h> | |
19cb3738 | 53 | #include <sys/ioctl.h> |
05acda4d | 54 | #include <sys/param.h> |
19cb3738 FB |
55 | #include <linux/cdrom.h> |
56 | #include <linux/fd.h> | |
5500316d | 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 | ||
df26a350 | 224 | static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp) |
c25f53b0 PB |
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 | |
df26a350 | 243 | if (ioctl(fd, BLKSSZGET, §or_size) >= 0) { |
c25f53b0 PB |
244 | bs->request_alignment = sector_size; |
245 | } | |
246 | #endif | |
247 | #ifdef DKIOCGETBLOCKSIZE | |
df26a350 | 248 | if (ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) >= 0) { |
c25f53b0 PB |
249 | bs->request_alignment = sector_size; |
250 | } | |
251 | #endif | |
252 | #ifdef DIOCGSECTORSIZE | |
df26a350 | 253 | if (ioctl(fd, DIOCGSECTORSIZE, §or_size) >= 0) { |
c25f53b0 PB |
254 | bs->request_alignment = sector_size; |
255 | } | |
256 | #endif | |
257 | #ifdef CONFIG_XFS | |
258 | if (s->is_xfs) { | |
259 | struct dioattr da; | |
df26a350 | 260 | if (xfsctl(NULL, fd, XFS_IOC_DIOINFO, &da) >= 0) { |
c25f53b0 PB |
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) { | |
df26a350 | 273 | if (pread(fd, buf + align, MAX_BLOCKSIZE, 0) >= 0) { |
c25f53b0 PB |
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) { | |
df26a350 | 285 | if (pread(fd, buf, align, 0) >= 0) { |
c25f53b0 PB |
286 | bs->request_alignment = align; |
287 | break; | |
288 | } | |
289 | } | |
290 | qemu_vfree(buf); | |
291 | } | |
df26a350 KW |
292 | |
293 | if (!s->buf_align || !bs->request_alignment) { | |
294 | error_setg(errp, "Could not find working O_DIRECT alignment. " | |
295 | "Try cache.direct=off."); | |
296 | } | |
c25f53b0 PB |
297 | } |
298 | ||
6a8dc042 JC |
299 | static void raw_parse_flags(int bdrv_flags, int *open_flags) |
300 | { | |
301 | assert(open_flags != NULL); | |
302 | ||
303 | *open_flags |= O_BINARY; | |
304 | *open_flags &= ~O_ACCMODE; | |
305 | if (bdrv_flags & BDRV_O_RDWR) { | |
306 | *open_flags |= O_RDWR; | |
307 | } else { | |
308 | *open_flags |= O_RDONLY; | |
309 | } | |
310 | ||
311 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
312 | * and O_DIRECT for no caching. */ | |
313 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
314 | *open_flags |= O_DIRECT; | |
315 | } | |
6a8dc042 JC |
316 | } |
317 | ||
c2f3426c SH |
318 | static void raw_detach_aio_context(BlockDriverState *bs) |
319 | { | |
320 | #ifdef CONFIG_LINUX_AIO | |
321 | BDRVRawState *s = bs->opaque; | |
322 | ||
323 | if (s->use_aio) { | |
324 | laio_detach_aio_context(s->aio_ctx, bdrv_get_aio_context(bs)); | |
325 | } | |
326 | #endif | |
327 | } | |
328 | ||
329 | static void raw_attach_aio_context(BlockDriverState *bs, | |
330 | AioContext *new_context) | |
331 | { | |
332 | #ifdef CONFIG_LINUX_AIO | |
333 | BDRVRawState *s = bs->opaque; | |
334 | ||
335 | if (s->use_aio) { | |
336 | laio_attach_aio_context(s->aio_ctx, new_context); | |
337 | } | |
338 | #endif | |
339 | } | |
340 | ||
fc32a72d JC |
341 | #ifdef CONFIG_LINUX_AIO |
342 | static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) | |
343 | { | |
344 | int ret = -1; | |
345 | assert(aio_ctx != NULL); | |
346 | assert(use_aio != NULL); | |
347 | /* | |
348 | * Currently Linux do AIO only for files opened with O_DIRECT | |
349 | * specified so check NOCACHE flag too | |
350 | */ | |
351 | if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) == | |
352 | (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { | |
353 | ||
354 | /* if non-NULL, laio_init() has already been run */ | |
355 | if (*aio_ctx == NULL) { | |
356 | *aio_ctx = laio_init(); | |
357 | if (!*aio_ctx) { | |
358 | goto error; | |
359 | } | |
360 | } | |
361 | *use_aio = 1; | |
362 | } else { | |
363 | *use_aio = 0; | |
364 | } | |
365 | ||
366 | ret = 0; | |
367 | ||
368 | error: | |
369 | return ret; | |
370 | } | |
371 | #endif | |
372 | ||
078896a9 HR |
373 | static void raw_parse_filename(const char *filename, QDict *options, |
374 | Error **errp) | |
375 | { | |
376 | /* The filename does not have to be prefixed by the protocol name, since | |
377 | * "file" is the default protocol; therefore, the return value of this | |
378 | * function call can be ignored. */ | |
379 | strstart(filename, "file:", &filename); | |
380 | ||
381 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
382 | } | |
383 | ||
c66a6157 KW |
384 | static QemuOptsList raw_runtime_opts = { |
385 | .name = "raw", | |
386 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
387 | .desc = { | |
388 | { | |
389 | .name = "filename", | |
390 | .type = QEMU_OPT_STRING, | |
391 | .help = "File name of the image", | |
392 | }, | |
393 | { /* end of list */ } | |
394 | }, | |
395 | }; | |
396 | ||
397 | static int raw_open_common(BlockDriverState *bs, QDict *options, | |
e428e439 | 398 | int bdrv_flags, int open_flags, Error **errp) |
83f64091 FB |
399 | { |
400 | BDRVRawState *s = bs->opaque; | |
c66a6157 KW |
401 | QemuOpts *opts; |
402 | Error *local_err = NULL; | |
8bfea15d | 403 | const char *filename = NULL; |
0e1d8f4c | 404 | int fd, ret; |
260a82e5 | 405 | struct stat st; |
83f64091 | 406 | |
87ea75d5 | 407 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
c66a6157 | 408 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 409 | if (local_err) { |
e428e439 | 410 | error_propagate(errp, local_err); |
c66a6157 KW |
411 | ret = -EINVAL; |
412 | goto fail; | |
413 | } | |
414 | ||
415 | filename = qemu_opt_get(opts, "filename"); | |
416 | ||
1de1ae0a CE |
417 | ret = raw_normalize_devicepath(&filename); |
418 | if (ret != 0) { | |
e428e439 | 419 | error_setg_errno(errp, -ret, "Could not normalize device path"); |
c66a6157 | 420 | goto fail; |
1de1ae0a CE |
421 | } |
422 | ||
6a8dc042 JC |
423 | s->open_flags = open_flags; |
424 | raw_parse_flags(bdrv_flags, &s->open_flags); | |
83f64091 | 425 | |
90babde0 | 426 | s->fd = -1; |
40ff6d7e | 427 | fd = qemu_open(filename, s->open_flags, 0644); |
19cb3738 FB |
428 | if (fd < 0) { |
429 | ret = -errno; | |
c66a6157 | 430 | if (ret == -EROFS) { |
19cb3738 | 431 | ret = -EACCES; |
c66a6157 KW |
432 | } |
433 | goto fail; | |
19cb3738 | 434 | } |
83f64091 | 435 | s->fd = fd; |
9ef91a67 | 436 | |
5c6c3a6c | 437 | #ifdef CONFIG_LINUX_AIO |
fc32a72d | 438 | if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) { |
47e6b251 | 439 | qemu_close(fd); |
c66a6157 | 440 | ret = -errno; |
e428e439 | 441 | error_setg_errno(errp, -ret, "Could not set AIO state"); |
c66a6157 | 442 | goto fail; |
9ef91a67 | 443 | } |
fc32a72d | 444 | #endif |
9ef91a67 | 445 | |
7ce21016 | 446 | s->has_discard = true; |
97a2ae34 | 447 | s->has_write_zeroes = true; |
260a82e5 PB |
448 | |
449 | if (fstat(s->fd, &st) < 0) { | |
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 | } | |
260a82e5 | 474 | |
dce512de CH |
475 | #ifdef CONFIG_XFS |
476 | if (platform_test_xfs_fd(s->fd)) { | |
7ce21016 | 477 | s->is_xfs = true; |
dce512de CH |
478 | } |
479 | #endif | |
480 | ||
c2f3426c SH |
481 | raw_attach_aio_context(bs, bdrv_get_aio_context(bs)); |
482 | ||
c66a6157 KW |
483 | ret = 0; |
484 | fail: | |
8bfea15d KW |
485 | if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { |
486 | unlink(filename); | |
487 | } | |
c66a6157 KW |
488 | qemu_opts_del(opts); |
489 | return ret; | |
83f64091 FB |
490 | } |
491 | ||
015a1036 HR |
492 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
493 | Error **errp) | |
90babde0 CH |
494 | { |
495 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
496 | Error *local_err = NULL; |
497 | int ret; | |
90babde0 CH |
498 | |
499 | s->type = FTYPE_FILE; | |
e428e439 | 500 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
84d18f06 | 501 | if (local_err) { |
e428e439 HR |
502 | error_propagate(errp, local_err); |
503 | } | |
504 | return ret; | |
90babde0 CH |
505 | } |
506 | ||
eeb6b45d JC |
507 | static int raw_reopen_prepare(BDRVReopenState *state, |
508 | BlockReopenQueue *queue, Error **errp) | |
509 | { | |
510 | BDRVRawState *s; | |
511 | BDRVRawReopenState *raw_s; | |
512 | int ret = 0; | |
df26a350 | 513 | Error *local_err = NULL; |
eeb6b45d JC |
514 | |
515 | assert(state != NULL); | |
516 | assert(state->bs != NULL); | |
517 | ||
518 | s = state->bs->opaque; | |
519 | ||
520 | state->opaque = g_malloc0(sizeof(BDRVRawReopenState)); | |
521 | raw_s = state->opaque; | |
522 | ||
523 | #ifdef CONFIG_LINUX_AIO | |
524 | raw_s->use_aio = s->use_aio; | |
525 | ||
526 | /* we can use s->aio_ctx instead of a copy, because the use_aio flag is | |
527 | * valid in the 'false' condition even if aio_ctx is set, and raw_set_aio() | |
528 | * won't override aio_ctx if aio_ctx is non-NULL */ | |
529 | if (raw_set_aio(&s->aio_ctx, &raw_s->use_aio, state->flags)) { | |
e428e439 | 530 | error_setg(errp, "Could not set AIO state"); |
eeb6b45d JC |
531 | return -1; |
532 | } | |
533 | #endif | |
534 | ||
1bc6b705 JC |
535 | if (s->type == FTYPE_FD || s->type == FTYPE_CD) { |
536 | raw_s->open_flags |= O_NONBLOCK; | |
537 | } | |
538 | ||
eeb6b45d JC |
539 | raw_parse_flags(state->flags, &raw_s->open_flags); |
540 | ||
541 | raw_s->fd = -1; | |
542 | ||
fdf263f6 | 543 | int fcntl_flags = O_APPEND | O_NONBLOCK; |
eeb6b45d JC |
544 | #ifdef O_NOATIME |
545 | fcntl_flags |= O_NOATIME; | |
546 | #endif | |
547 | ||
fdf263f6 AF |
548 | #ifdef O_ASYNC |
549 | /* Not all operating systems have O_ASYNC, and those that don't | |
550 | * will not let us track the state into raw_s->open_flags (typically | |
551 | * you achieve the same effect with an ioctl, for example I_SETSIG | |
552 | * on Solaris). But we do not use O_ASYNC, so that's fine. | |
553 | */ | |
554 | assert((s->open_flags & O_ASYNC) == 0); | |
555 | #endif | |
556 | ||
eeb6b45d JC |
557 | if ((raw_s->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { |
558 | /* dup the original fd */ | |
559 | /* TODO: use qemu fcntl wrapper */ | |
560 | #ifdef F_DUPFD_CLOEXEC | |
561 | raw_s->fd = fcntl(s->fd, F_DUPFD_CLOEXEC, 0); | |
562 | #else | |
563 | raw_s->fd = dup(s->fd); | |
564 | if (raw_s->fd != -1) { | |
565 | qemu_set_cloexec(raw_s->fd); | |
566 | } | |
567 | #endif | |
568 | if (raw_s->fd >= 0) { | |
569 | ret = fcntl_setfl(raw_s->fd, raw_s->open_flags); | |
570 | if (ret) { | |
571 | qemu_close(raw_s->fd); | |
572 | raw_s->fd = -1; | |
573 | } | |
574 | } | |
575 | } | |
576 | ||
577 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ | |
578 | if (raw_s->fd == -1) { | |
579 | assert(!(raw_s->open_flags & O_CREAT)); | |
580 | raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags); | |
581 | if (raw_s->fd == -1) { | |
e428e439 | 582 | error_setg_errno(errp, errno, "Could not reopen file"); |
eeb6b45d JC |
583 | ret = -1; |
584 | } | |
585 | } | |
df26a350 KW |
586 | |
587 | /* Fail already reopen_prepare() if we can't get a working O_DIRECT | |
588 | * alignment with the new fd. */ | |
589 | if (raw_s->fd != -1) { | |
590 | raw_probe_alignment(state->bs, raw_s->fd, &local_err); | |
591 | if (local_err) { | |
592 | qemu_close(raw_s->fd); | |
593 | raw_s->fd = -1; | |
594 | error_propagate(errp, local_err); | |
595 | ret = -EINVAL; | |
596 | } | |
597 | } | |
598 | ||
eeb6b45d JC |
599 | return ret; |
600 | } | |
601 | ||
eeb6b45d JC |
602 | static void raw_reopen_commit(BDRVReopenState *state) |
603 | { | |
604 | BDRVRawReopenState *raw_s = state->opaque; | |
605 | BDRVRawState *s = state->bs->opaque; | |
606 | ||
607 | s->open_flags = raw_s->open_flags; | |
608 | ||
609 | qemu_close(s->fd); | |
610 | s->fd = raw_s->fd; | |
611 | #ifdef CONFIG_LINUX_AIO | |
612 | s->use_aio = raw_s->use_aio; | |
613 | #endif | |
614 | ||
615 | g_free(state->opaque); | |
616 | state->opaque = NULL; | |
617 | } | |
618 | ||
619 | ||
620 | static void raw_reopen_abort(BDRVReopenState *state) | |
621 | { | |
622 | BDRVRawReopenState *raw_s = state->opaque; | |
623 | ||
624 | /* nothing to do if NULL, we didn't get far enough */ | |
625 | if (raw_s == NULL) { | |
626 | return; | |
627 | } | |
628 | ||
629 | if (raw_s->fd >= 0) { | |
630 | qemu_close(raw_s->fd); | |
631 | raw_s->fd = -1; | |
632 | } | |
633 | g_free(state->opaque); | |
634 | state->opaque = NULL; | |
635 | } | |
636 | ||
3baca891 | 637 | static void raw_refresh_limits(BlockDriverState *bs, Error **errp) |
c25f53b0 PB |
638 | { |
639 | BDRVRawState *s = bs->opaque; | |
eeb6b45d | 640 | |
df26a350 | 641 | raw_probe_alignment(bs, s->fd, errp); |
c25f53b0 | 642 | bs->bl.opt_mem_alignment = s->buf_align; |
c25f53b0 | 643 | } |
83f64091 | 644 | |
de81a169 PB |
645 | static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb) |
646 | { | |
647 | int ret; | |
648 | ||
649 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); | |
650 | if (ret == -1) { | |
651 | return -errno; | |
652 | } | |
653 | ||
b608c8dc | 654 | return 0; |
de81a169 PB |
655 | } |
656 | ||
657 | static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb) | |
658 | { | |
659 | int ret; | |
660 | ||
661 | ret = qemu_fdatasync(aiocb->aio_fildes); | |
662 | if (ret == -1) { | |
663 | return -errno; | |
664 | } | |
665 | return 0; | |
666 | } | |
667 | ||
668 | #ifdef CONFIG_PREADV | |
669 | ||
670 | static bool preadv_present = true; | |
671 | ||
672 | static ssize_t | |
673 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
674 | { | |
675 | return preadv(fd, iov, nr_iov, offset); | |
676 | } | |
677 | ||
678 | static ssize_t | |
679 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
680 | { | |
681 | return pwritev(fd, iov, nr_iov, offset); | |
682 | } | |
683 | ||
684 | #else | |
685 | ||
686 | static bool preadv_present = false; | |
687 | ||
688 | static ssize_t | |
689 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
690 | { | |
691 | return -ENOSYS; | |
692 | } | |
693 | ||
694 | static ssize_t | |
695 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
696 | { | |
697 | return -ENOSYS; | |
698 | } | |
699 | ||
700 | #endif | |
701 | ||
702 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) | |
703 | { | |
704 | ssize_t len; | |
705 | ||
706 | do { | |
707 | if (aiocb->aio_type & QEMU_AIO_WRITE) | |
708 | len = qemu_pwritev(aiocb->aio_fildes, | |
709 | aiocb->aio_iov, | |
710 | aiocb->aio_niov, | |
711 | aiocb->aio_offset); | |
712 | else | |
713 | len = qemu_preadv(aiocb->aio_fildes, | |
714 | aiocb->aio_iov, | |
715 | aiocb->aio_niov, | |
716 | aiocb->aio_offset); | |
717 | } while (len == -1 && errno == EINTR); | |
718 | ||
719 | if (len == -1) { | |
720 | return -errno; | |
721 | } | |
722 | return len; | |
723 | } | |
724 | ||
725 | /* | |
726 | * Read/writes the data to/from a given linear buffer. | |
727 | * | |
728 | * Returns the number of bytes handles or -errno in case of an error. Short | |
729 | * reads are only returned if the end of the file is reached. | |
730 | */ | |
731 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) | |
732 | { | |
733 | ssize_t offset = 0; | |
734 | ssize_t len; | |
735 | ||
736 | while (offset < aiocb->aio_nbytes) { | |
737 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
738 | len = pwrite(aiocb->aio_fildes, | |
739 | (const char *)buf + offset, | |
740 | aiocb->aio_nbytes - offset, | |
741 | aiocb->aio_offset + offset); | |
742 | } else { | |
743 | len = pread(aiocb->aio_fildes, | |
744 | buf + offset, | |
745 | aiocb->aio_nbytes - offset, | |
746 | aiocb->aio_offset + offset); | |
747 | } | |
748 | if (len == -1 && errno == EINTR) { | |
749 | continue; | |
750 | } else if (len == -1) { | |
751 | offset = -errno; | |
752 | break; | |
753 | } else if (len == 0) { | |
754 | break; | |
755 | } | |
756 | offset += len; | |
757 | } | |
758 | ||
759 | return offset; | |
760 | } | |
761 | ||
762 | static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) | |
763 | { | |
764 | ssize_t nbytes; | |
765 | char *buf; | |
766 | ||
767 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { | |
768 | /* | |
769 | * If there is just a single buffer, and it is properly aligned | |
770 | * we can just use plain pread/pwrite without any problems. | |
771 | */ | |
772 | if (aiocb->aio_niov == 1) { | |
773 | return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base); | |
774 | } | |
775 | /* | |
776 | * We have more than one iovec, and all are properly aligned. | |
777 | * | |
778 | * Try preadv/pwritev first and fall back to linearizing the | |
779 | * buffer if it's not supported. | |
780 | */ | |
781 | if (preadv_present) { | |
782 | nbytes = handle_aiocb_rw_vector(aiocb); | |
783 | if (nbytes == aiocb->aio_nbytes || | |
784 | (nbytes < 0 && nbytes != -ENOSYS)) { | |
785 | return nbytes; | |
786 | } | |
787 | preadv_present = false; | |
788 | } | |
789 | ||
790 | /* | |
791 | * XXX(hch): short read/write. no easy way to handle the reminder | |
792 | * using these interfaces. For now retry using plain | |
793 | * pread/pwrite? | |
794 | */ | |
795 | } | |
796 | ||
797 | /* | |
798 | * Ok, we have to do it the hard way, copy all segments into | |
799 | * a single aligned buffer. | |
800 | */ | |
50d4a858 KW |
801 | buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes); |
802 | if (buf == NULL) { | |
803 | return -ENOMEM; | |
804 | } | |
805 | ||
de81a169 PB |
806 | if (aiocb->aio_type & QEMU_AIO_WRITE) { |
807 | char *p = buf; | |
808 | int i; | |
809 | ||
810 | for (i = 0; i < aiocb->aio_niov; ++i) { | |
811 | memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len); | |
812 | p += aiocb->aio_iov[i].iov_len; | |
813 | } | |
8eb029c2 | 814 | assert(p - buf == aiocb->aio_nbytes); |
de81a169 PB |
815 | } |
816 | ||
817 | nbytes = handle_aiocb_rw_linear(aiocb, buf); | |
818 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { | |
819 | char *p = buf; | |
820 | size_t count = aiocb->aio_nbytes, copy; | |
821 | int i; | |
822 | ||
823 | for (i = 0; i < aiocb->aio_niov && count; ++i) { | |
824 | copy = count; | |
825 | if (copy > aiocb->aio_iov[i].iov_len) { | |
826 | copy = aiocb->aio_iov[i].iov_len; | |
827 | } | |
828 | memcpy(aiocb->aio_iov[i].iov_base, p, copy); | |
8eb029c2 | 829 | assert(count >= copy); |
de81a169 PB |
830 | p += copy; |
831 | count -= copy; | |
832 | } | |
8eb029c2 | 833 | assert(count == 0); |
de81a169 PB |
834 | } |
835 | qemu_vfree(buf); | |
836 | ||
837 | return nbytes; | |
838 | } | |
839 | ||
8238010b | 840 | #ifdef CONFIG_XFS |
97a2ae34 PB |
841 | static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes) |
842 | { | |
843 | struct xfs_flock64 fl; | |
844 | ||
845 | memset(&fl, 0, sizeof(fl)); | |
846 | fl.l_whence = SEEK_SET; | |
847 | fl.l_start = offset; | |
848 | fl.l_len = bytes; | |
849 | ||
850 | if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) { | |
851 | DEBUG_BLOCK_PRINT("cannot write zero range (%s)\n", strerror(errno)); | |
852 | return -errno; | |
853 | } | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
8238010b PB |
858 | static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes) |
859 | { | |
860 | struct xfs_flock64 fl; | |
861 | ||
862 | memset(&fl, 0, sizeof(fl)); | |
863 | fl.l_whence = SEEK_SET; | |
864 | fl.l_start = offset; | |
865 | fl.l_len = bytes; | |
866 | ||
867 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
868 | DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno)); | |
869 | return -errno; | |
870 | } | |
871 | ||
872 | return 0; | |
873 | } | |
874 | #endif | |
875 | ||
97a2ae34 PB |
876 | static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) |
877 | { | |
878 | int ret = -EOPNOTSUPP; | |
879 | BDRVRawState *s = aiocb->bs->opaque; | |
880 | ||
881 | if (s->has_write_zeroes == 0) { | |
882 | return -ENOTSUP; | |
883 | } | |
884 | ||
885 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
886 | #ifdef BLKZEROOUT | |
887 | do { | |
888 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
889 | if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) { | |
890 | return 0; | |
891 | } | |
892 | } while (errno == EINTR); | |
893 | ||
894 | ret = -errno; | |
895 | #endif | |
896 | } else { | |
897 | #ifdef CONFIG_XFS | |
898 | if (s->is_xfs) { | |
899 | return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
900 | } | |
901 | #endif | |
902 | } | |
903 | ||
904 | if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP || | |
905 | ret == -ENOTTY) { | |
906 | s->has_write_zeroes = false; | |
907 | ret = -ENOTSUP; | |
908 | } | |
909 | return ret; | |
910 | } | |
911 | ||
8238010b PB |
912 | static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb) |
913 | { | |
914 | int ret = -EOPNOTSUPP; | |
915 | BDRVRawState *s = aiocb->bs->opaque; | |
916 | ||
7ce21016 PB |
917 | if (!s->has_discard) { |
918 | return -ENOTSUP; | |
8238010b PB |
919 | } |
920 | ||
921 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
922 | #ifdef BLKDISCARD | |
923 | do { | |
924 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
925 | if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) { | |
926 | return 0; | |
927 | } | |
928 | } while (errno == EINTR); | |
929 | ||
930 | ret = -errno; | |
931 | #endif | |
932 | } else { | |
933 | #ifdef CONFIG_XFS | |
934 | if (s->is_xfs) { | |
935 | return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
936 | } | |
937 | #endif | |
938 | ||
939 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE | |
940 | do { | |
941 | if (fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, | |
942 | aiocb->aio_offset, aiocb->aio_nbytes) == 0) { | |
943 | return 0; | |
944 | } | |
945 | } while (errno == EINTR); | |
946 | ||
947 | ret = -errno; | |
948 | #endif | |
949 | } | |
950 | ||
951 | if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP || | |
952 | ret == -ENOTTY) { | |
7ce21016 PB |
953 | s->has_discard = false; |
954 | ret = -ENOTSUP; | |
8238010b PB |
955 | } |
956 | return ret; | |
957 | } | |
958 | ||
de81a169 PB |
959 | static int aio_worker(void *arg) |
960 | { | |
961 | RawPosixAIOData *aiocb = arg; | |
962 | ssize_t ret = 0; | |
963 | ||
964 | switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) { | |
965 | case QEMU_AIO_READ: | |
966 | ret = handle_aiocb_rw(aiocb); | |
967 | if (ret >= 0 && ret < aiocb->aio_nbytes && aiocb->bs->growable) { | |
968 | iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret, | |
969 | 0, aiocb->aio_nbytes - ret); | |
970 | ||
971 | ret = aiocb->aio_nbytes; | |
972 | } | |
973 | if (ret == aiocb->aio_nbytes) { | |
974 | ret = 0; | |
975 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
976 | ret = -EINVAL; | |
977 | } | |
978 | break; | |
979 | case QEMU_AIO_WRITE: | |
980 | ret = handle_aiocb_rw(aiocb); | |
981 | if (ret == aiocb->aio_nbytes) { | |
982 | ret = 0; | |
983 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
984 | ret = -EINVAL; | |
985 | } | |
986 | break; | |
987 | case QEMU_AIO_FLUSH: | |
988 | ret = handle_aiocb_flush(aiocb); | |
989 | break; | |
990 | case QEMU_AIO_IOCTL: | |
991 | ret = handle_aiocb_ioctl(aiocb); | |
992 | break; | |
8238010b PB |
993 | case QEMU_AIO_DISCARD: |
994 | ret = handle_aiocb_discard(aiocb); | |
995 | break; | |
97a2ae34 PB |
996 | case QEMU_AIO_WRITE_ZEROES: |
997 | ret = handle_aiocb_write_zeroes(aiocb); | |
998 | break; | |
de81a169 PB |
999 | default: |
1000 | fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); | |
1001 | ret = -EINVAL; | |
1002 | break; | |
1003 | } | |
1004 | ||
1005 | g_slice_free(RawPosixAIOData, aiocb); | |
1006 | return ret; | |
1007 | } | |
1008 | ||
260a82e5 PB |
1009 | static int paio_submit_co(BlockDriverState *bs, int fd, |
1010 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1011 | int type) | |
1012 | { | |
1013 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
1014 | ThreadPool *pool; | |
1015 | ||
1016 | acb->bs = bs; | |
1017 | acb->aio_type = type; | |
1018 | acb->aio_fildes = fd; | |
1019 | ||
8eb029c2 KW |
1020 | acb->aio_nbytes = nb_sectors * BDRV_SECTOR_SIZE; |
1021 | acb->aio_offset = sector_num * BDRV_SECTOR_SIZE; | |
1022 | ||
260a82e5 PB |
1023 | if (qiov) { |
1024 | acb->aio_iov = qiov->iov; | |
1025 | acb->aio_niov = qiov->niov; | |
8eb029c2 | 1026 | assert(qiov->size == acb->aio_nbytes); |
260a82e5 | 1027 | } |
260a82e5 PB |
1028 | |
1029 | trace_paio_submit_co(sector_num, nb_sectors, type); | |
1030 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); | |
1031 | return thread_pool_submit_co(pool, aio_worker, acb); | |
1032 | } | |
1033 | ||
de81a169 PB |
1034 | static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, |
1035 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1036 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
1037 | { | |
1038 | RawPosixAIOData *acb = g_slice_new(RawPosixAIOData); | |
c4d9d196 | 1039 | ThreadPool *pool; |
de81a169 PB |
1040 | |
1041 | acb->bs = bs; | |
1042 | acb->aio_type = type; | |
1043 | acb->aio_fildes = fd; | |
1044 | ||
8eb029c2 KW |
1045 | acb->aio_nbytes = nb_sectors * BDRV_SECTOR_SIZE; |
1046 | acb->aio_offset = sector_num * BDRV_SECTOR_SIZE; | |
1047 | ||
de81a169 PB |
1048 | if (qiov) { |
1049 | acb->aio_iov = qiov->iov; | |
1050 | acb->aio_niov = qiov->niov; | |
8eb029c2 | 1051 | assert(qiov->size == acb->aio_nbytes); |
de81a169 | 1052 | } |
de81a169 PB |
1053 | |
1054 | trace_paio_submit(acb, opaque, sector_num, nb_sectors, type); | |
c4d9d196 SH |
1055 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1056 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
de81a169 PB |
1057 | } |
1058 | ||
9ef91a67 CH |
1059 | static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs, |
1060 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1061 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
83f64091 | 1062 | { |
ce1a14dc | 1063 | BDRVRawState *s = bs->opaque; |
ce1a14dc | 1064 | |
19cb3738 FB |
1065 | if (fd_open(bs) < 0) |
1066 | return NULL; | |
1067 | ||
f141eafe AL |
1068 | /* |
1069 | * If O_DIRECT is used the buffer needs to be aligned on a sector | |
c1ee7d56 | 1070 | * boundary. Check if this is the case or tell the low-level |
9ef91a67 | 1071 | * driver that it needs to copy the buffer. |
f141eafe | 1072 | */ |
9acc5a06 | 1073 | if ((bs->open_flags & BDRV_O_NOCACHE)) { |
c53b1c51 | 1074 | if (!bdrv_qiov_is_aligned(bs, qiov)) { |
5c6c3a6c | 1075 | type |= QEMU_AIO_MISALIGNED; |
e44bd6fc | 1076 | #ifdef CONFIG_LINUX_AIO |
5c6c3a6c CH |
1077 | } else if (s->use_aio) { |
1078 | return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, | |
e44bd6fc SW |
1079 | nb_sectors, cb, opaque, type); |
1080 | #endif | |
5c6c3a6c | 1081 | } |
9ef91a67 | 1082 | } |
f141eafe | 1083 | |
1e5b9d2f | 1084 | return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors, |
9ef91a67 | 1085 | cb, opaque, type); |
83f64091 FB |
1086 | } |
1087 | ||
1b3abdcc ML |
1088 | static void raw_aio_plug(BlockDriverState *bs) |
1089 | { | |
1090 | #ifdef CONFIG_LINUX_AIO | |
1091 | BDRVRawState *s = bs->opaque; | |
1092 | if (s->use_aio) { | |
1093 | laio_io_plug(bs, s->aio_ctx); | |
1094 | } | |
1095 | #endif | |
1096 | } | |
1097 | ||
1098 | static void raw_aio_unplug(BlockDriverState *bs) | |
1099 | { | |
1100 | #ifdef CONFIG_LINUX_AIO | |
1101 | BDRVRawState *s = bs->opaque; | |
1102 | if (s->use_aio) { | |
1103 | laio_io_unplug(bs, s->aio_ctx, true); | |
1104 | } | |
1105 | #endif | |
1106 | } | |
1107 | ||
1108 | static void raw_aio_flush_io_queue(BlockDriverState *bs) | |
1109 | { | |
1110 | #ifdef CONFIG_LINUX_AIO | |
1111 | BDRVRawState *s = bs->opaque; | |
1112 | if (s->use_aio) { | |
1113 | laio_io_unplug(bs, s->aio_ctx, false); | |
1114 | } | |
1115 | #endif | |
1116 | } | |
1117 | ||
f141eafe AL |
1118 | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, |
1119 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 1120 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 1121 | { |
9ef91a67 CH |
1122 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
1123 | cb, opaque, QEMU_AIO_READ); | |
83f64091 FB |
1124 | } |
1125 | ||
f141eafe AL |
1126 | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, |
1127 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 1128 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 1129 | { |
9ef91a67 CH |
1130 | return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
1131 | cb, opaque, QEMU_AIO_WRITE); | |
83f64091 | 1132 | } |
53538725 | 1133 | |
b2e12bc6 CH |
1134 | static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs, |
1135 | BlockDriverCompletionFunc *cb, void *opaque) | |
1136 | { | |
1137 | BDRVRawState *s = bs->opaque; | |
1138 | ||
1139 | if (fd_open(bs) < 0) | |
1140 | return NULL; | |
1141 | ||
1e5b9d2f | 1142 | return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
b2e12bc6 CH |
1143 | } |
1144 | ||
83f64091 FB |
1145 | static void raw_close(BlockDriverState *bs) |
1146 | { | |
1147 | BDRVRawState *s = bs->opaque; | |
c2f3426c SH |
1148 | |
1149 | raw_detach_aio_context(bs); | |
1150 | ||
abd269b7 SH |
1151 | #ifdef CONFIG_LINUX_AIO |
1152 | if (s->use_aio) { | |
1153 | laio_cleanup(s->aio_ctx); | |
1154 | } | |
1155 | #endif | |
19cb3738 | 1156 | if (s->fd >= 0) { |
2e1e79da | 1157 | qemu_close(s->fd); |
19cb3738 FB |
1158 | s->fd = -1; |
1159 | } | |
83f64091 FB |
1160 | } |
1161 | ||
1162 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
1163 | { | |
1164 | BDRVRawState *s = bs->opaque; | |
55b949c8 CH |
1165 | struct stat st; |
1166 | ||
1167 | if (fstat(s->fd, &st)) { | |
83f64091 | 1168 | return -errno; |
55b949c8 CH |
1169 | } |
1170 | ||
1171 | if (S_ISREG(st.st_mode)) { | |
1172 | if (ftruncate(s->fd, offset) < 0) { | |
1173 | return -errno; | |
1174 | } | |
1175 | } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1176 | if (offset > raw_getlength(bs)) { | |
1177 | return -EINVAL; | |
1178 | } | |
1179 | } else { | |
1180 | return -ENOTSUP; | |
1181 | } | |
1182 | ||
83f64091 FB |
1183 | return 0; |
1184 | } | |
1185 | ||
128ab2ff BS |
1186 | #ifdef __OpenBSD__ |
1187 | static int64_t raw_getlength(BlockDriverState *bs) | |
1188 | { | |
1189 | BDRVRawState *s = bs->opaque; | |
1190 | int fd = s->fd; | |
1191 | struct stat st; | |
1192 | ||
1193 | if (fstat(fd, &st)) | |
aa729704 | 1194 | return -errno; |
128ab2ff BS |
1195 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
1196 | struct disklabel dl; | |
1197 | ||
1198 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
aa729704 | 1199 | return -errno; |
128ab2ff BS |
1200 | return (uint64_t)dl.d_secsize * |
1201 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1202 | } else | |
1203 | return st.st_size; | |
1204 | } | |
d1f6fd8d CE |
1205 | #elif defined(__NetBSD__) |
1206 | static int64_t raw_getlength(BlockDriverState *bs) | |
1207 | { | |
1208 | BDRVRawState *s = bs->opaque; | |
1209 | int fd = s->fd; | |
1210 | struct stat st; | |
1211 | ||
1212 | if (fstat(fd, &st)) | |
aa729704 | 1213 | return -errno; |
d1f6fd8d CE |
1214 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
1215 | struct dkwedge_info dkw; | |
1216 | ||
1217 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
1218 | return dkw.dkw_size * 512; | |
1219 | } else { | |
1220 | struct disklabel dl; | |
1221 | ||
1222 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
aa729704 | 1223 | return -errno; |
d1f6fd8d CE |
1224 | return (uint64_t)dl.d_secsize * |
1225 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1226 | } | |
1227 | } else | |
1228 | return st.st_size; | |
1229 | } | |
50779cc2 CH |
1230 | #elif defined(__sun__) |
1231 | static int64_t raw_getlength(BlockDriverState *bs) | |
1232 | { | |
1233 | BDRVRawState *s = bs->opaque; | |
1234 | struct dk_minfo minfo; | |
1235 | int ret; | |
aa729704 | 1236 | int64_t size; |
50779cc2 CH |
1237 | |
1238 | ret = fd_open(bs); | |
1239 | if (ret < 0) { | |
1240 | return ret; | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
1245 | */ | |
1246 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
1247 | if (ret != -1) { | |
1248 | return minfo.dki_lbsize * minfo.dki_capacity; | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * There are reports that lseek on some devices fails, but | |
1253 | * irc discussion said that contingency on contingency was overkill. | |
1254 | */ | |
aa729704 MA |
1255 | size = lseek(s->fd, 0, SEEK_END); |
1256 | if (size < 0) { | |
1257 | return -errno; | |
1258 | } | |
1259 | return size; | |
50779cc2 CH |
1260 | } |
1261 | #elif defined(CONFIG_BSD) | |
1262 | static int64_t raw_getlength(BlockDriverState *bs) | |
83f64091 FB |
1263 | { |
1264 | BDRVRawState *s = bs->opaque; | |
1265 | int fd = s->fd; | |
1266 | int64_t size; | |
83f64091 | 1267 | struct stat sb; |
a167ba50 | 1268 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a | 1269 | int reopened = 0; |
83f64091 | 1270 | #endif |
19cb3738 FB |
1271 | int ret; |
1272 | ||
1273 | ret = fd_open(bs); | |
1274 | if (ret < 0) | |
1275 | return ret; | |
83f64091 | 1276 | |
a167ba50 | 1277 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1278 | again: |
1279 | #endif | |
83f64091 FB |
1280 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
1281 | #ifdef DIOCGMEDIASIZE | |
1282 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
c5e97233 BS |
1283 | #elif defined(DIOCGPART) |
1284 | { | |
1285 | struct partinfo pi; | |
1286 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
1287 | size = pi.media_size; | |
1288 | else | |
1289 | size = 0; | |
1290 | } | |
1291 | if (size == 0) | |
83f64091 | 1292 | #endif |
83affaa6 | 1293 | #if defined(__APPLE__) && defined(__MACH__) |
675036e4 | 1294 | size = LLONG_MAX; |
83f64091 FB |
1295 | #else |
1296 | size = lseek(fd, 0LL, SEEK_END); | |
aa729704 MA |
1297 | if (size < 0) { |
1298 | return -errno; | |
1299 | } | |
9f23011a | 1300 | #endif |
a167ba50 | 1301 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1302 | switch(s->type) { |
1303 | case FTYPE_CD: | |
1304 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
1305 | if (size == 2048LL * (unsigned)-1) | |
1306 | size = 0; | |
1307 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 1308 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
1309 | reopened = 1; |
1310 | goto again; | |
1311 | } | |
1312 | } | |
83f64091 | 1313 | #endif |
50779cc2 | 1314 | } else { |
83f64091 | 1315 | size = lseek(fd, 0, SEEK_END); |
aa729704 MA |
1316 | if (size < 0) { |
1317 | return -errno; | |
1318 | } | |
83f64091 | 1319 | } |
83f64091 FB |
1320 | return size; |
1321 | } | |
50779cc2 CH |
1322 | #else |
1323 | static int64_t raw_getlength(BlockDriverState *bs) | |
1324 | { | |
1325 | BDRVRawState *s = bs->opaque; | |
1326 | int ret; | |
aa729704 | 1327 | int64_t size; |
50779cc2 CH |
1328 | |
1329 | ret = fd_open(bs); | |
1330 | if (ret < 0) { | |
1331 | return ret; | |
1332 | } | |
1333 | ||
aa729704 MA |
1334 | size = lseek(s->fd, 0, SEEK_END); |
1335 | if (size < 0) { | |
1336 | return -errno; | |
1337 | } | |
1338 | return size; | |
50779cc2 | 1339 | } |
128ab2ff | 1340 | #endif |
83f64091 | 1341 | |
4a1d5e1f FZ |
1342 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
1343 | { | |
1344 | struct stat st; | |
1345 | BDRVRawState *s = bs->opaque; | |
1346 | ||
1347 | if (fstat(s->fd, &st) < 0) { | |
1348 | return -errno; | |
1349 | } | |
1350 | return (int64_t)st.st_blocks * 512; | |
1351 | } | |
1352 | ||
6f482f74 | 1353 | static int raw_create(const char *filename, QemuOpts *opts, Error **errp) |
83f64091 FB |
1354 | { |
1355 | int fd; | |
1e37d059 | 1356 | int result = 0; |
0e7e1989 | 1357 | int64_t total_size = 0; |
4ab15590 | 1358 | bool nocow = false; |
83f64091 | 1359 | |
464d9f64 HR |
1360 | strstart(filename, "file:", &filename); |
1361 | ||
0e7e1989 | 1362 | /* Read out options */ |
6f482f74 CL |
1363 | total_size = |
1364 | qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE; | |
4ab15590 | 1365 | nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false); |
83f64091 | 1366 | |
6165f4d8 CB |
1367 | fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
1368 | 0644); | |
1e37d059 SW |
1369 | if (fd < 0) { |
1370 | result = -errno; | |
e428e439 | 1371 | error_setg_errno(errp, -result, "Could not create file"); |
1e37d059 | 1372 | } else { |
4ab15590 CL |
1373 | if (nocow) { |
1374 | #ifdef __linux__ | |
1375 | /* Set NOCOW flag to solve performance issue on fs like btrfs. | |
1376 | * This is an optimisation. The FS_IOC_SETFLAGS ioctl return value | |
1377 | * will be ignored since any failure of this operation should not | |
1378 | * block the left work. | |
1379 | */ | |
1380 | int attr; | |
1381 | if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0) { | |
1382 | attr |= FS_NOCOW_FL; | |
1383 | ioctl(fd, FS_IOC_SETFLAGS, &attr); | |
1384 | } | |
1385 | #endif | |
1386 | } | |
1387 | ||
9040385d | 1388 | if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
1e37d059 | 1389 | result = -errno; |
e428e439 | 1390 | error_setg_errno(errp, -result, "Could not resize file"); |
1e37d059 | 1391 | } |
2e1e79da | 1392 | if (qemu_close(fd) != 0) { |
1e37d059 | 1393 | result = -errno; |
e428e439 | 1394 | error_setg_errno(errp, -result, "Could not close the new file"); |
1e37d059 SW |
1395 | } |
1396 | } | |
1397 | return result; | |
83f64091 FB |
1398 | } |
1399 | ||
4f11aa8a HR |
1400 | static int64_t try_fiemap(BlockDriverState *bs, off_t start, off_t *data, |
1401 | off_t *hole, int nb_sectors, int *pnum) | |
5500316d | 1402 | { |
5500316d | 1403 | #ifdef CONFIG_FIEMAP |
94282e71 | 1404 | BDRVRawState *s = bs->opaque; |
4f11aa8a | 1405 | int64_t ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; |
5500316d PB |
1406 | struct { |
1407 | struct fiemap fm; | |
1408 | struct fiemap_extent fe; | |
1409 | } f; | |
94282e71 | 1410 | |
4f11aa8a HR |
1411 | if (s->skip_fiemap) { |
1412 | return -ENOTSUP; | |
1413 | } | |
1414 | ||
5500316d PB |
1415 | f.fm.fm_start = start; |
1416 | f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE; | |
1417 | f.fm.fm_flags = 0; | |
1418 | f.fm.fm_extent_count = 1; | |
1419 | f.fm.fm_reserved = 0; | |
1420 | if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) { | |
4f11aa8a HR |
1421 | s->skip_fiemap = true; |
1422 | return -errno; | |
5500316d PB |
1423 | } |
1424 | ||
1425 | if (f.fm.fm_mapped_extents == 0) { | |
1426 | /* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length. | |
1427 | * f.fm.fm_start + f.fm.fm_length must be clamped to the file size! | |
1428 | */ | |
1429 | off_t length = lseek(s->fd, 0, SEEK_END); | |
4f11aa8a HR |
1430 | *hole = f.fm.fm_start; |
1431 | *data = MIN(f.fm.fm_start + f.fm.fm_length, length); | |
5500316d | 1432 | } else { |
4f11aa8a HR |
1433 | *data = f.fe.fe_logical; |
1434 | *hole = f.fe.fe_logical + f.fe.fe_length; | |
f5f7abcf PB |
1435 | if (f.fe.fe_flags & FIEMAP_EXTENT_UNWRITTEN) { |
1436 | ret |= BDRV_BLOCK_ZERO; | |
1437 | } | |
5500316d | 1438 | } |
94282e71 | 1439 | |
4f11aa8a HR |
1440 | return ret; |
1441 | #else | |
1442 | return -ENOTSUP; | |
1443 | #endif | |
1444 | } | |
94282e71 | 1445 | |
4f11aa8a HR |
1446 | static int64_t try_seek_hole(BlockDriverState *bs, off_t start, off_t *data, |
1447 | off_t *hole, int *pnum) | |
1448 | { | |
1449 | #if defined SEEK_HOLE && defined SEEK_DATA | |
94282e71 KW |
1450 | BDRVRawState *s = bs->opaque; |
1451 | ||
4f11aa8a HR |
1452 | *hole = lseek(s->fd, start, SEEK_HOLE); |
1453 | if (*hole == -1) { | |
5500316d PB |
1454 | /* -ENXIO indicates that sector_num was past the end of the file. |
1455 | * There is a virtual hole there. */ | |
1456 | assert(errno != -ENXIO); | |
1457 | ||
4f11aa8a | 1458 | return -errno; |
5500316d PB |
1459 | } |
1460 | ||
4f11aa8a HR |
1461 | if (*hole > start) { |
1462 | *data = start; | |
5500316d PB |
1463 | } else { |
1464 | /* On a hole. We need another syscall to find its end. */ | |
4f11aa8a HR |
1465 | *data = lseek(s->fd, start, SEEK_DATA); |
1466 | if (*data == -1) { | |
1467 | *data = lseek(s->fd, 0, SEEK_END); | |
5500316d PB |
1468 | } |
1469 | } | |
4f11aa8a HR |
1470 | |
1471 | return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; | |
5500316d | 1472 | #else |
4f11aa8a | 1473 | return -ENOTSUP; |
5500316d | 1474 | #endif |
4f11aa8a HR |
1475 | } |
1476 | ||
1477 | /* | |
1478 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1479 | * not implementing the functionality are assumed to not support backing files, | |
1480 | * hence all their sectors are reported as allocated. | |
1481 | * | |
1482 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
1483 | * and 'pnum' is set to 0. | |
1484 | * | |
1485 | * 'pnum' is set to the number of sectors (including and immediately following | |
1486 | * the specified sector) that are known to be in the same | |
1487 | * allocated/unallocated state. | |
1488 | * | |
1489 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
1490 | * beyond the end of the disk image it will be clamped. | |
1491 | */ | |
1492 | static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, | |
1493 | int64_t sector_num, | |
1494 | int nb_sectors, int *pnum) | |
1495 | { | |
1496 | off_t start, data = 0, hole = 0; | |
1497 | int64_t ret; | |
1498 | ||
1499 | ret = fd_open(bs); | |
1500 | if (ret < 0) { | |
1501 | return ret; | |
1502 | } | |
1503 | ||
1504 | start = sector_num * BDRV_SECTOR_SIZE; | |
1505 | ||
1506 | ret = try_fiemap(bs, start, &data, &hole, nb_sectors, pnum); | |
1507 | if (ret < 0) { | |
1508 | ret = try_seek_hole(bs, start, &data, &hole, pnum); | |
1509 | if (ret < 0) { | |
1510 | /* Assume everything is allocated. */ | |
1511 | data = 0; | |
1512 | hole = start + nb_sectors * BDRV_SECTOR_SIZE; | |
1513 | ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; | |
1514 | } | |
1515 | } | |
5500316d PB |
1516 | |
1517 | if (data <= start) { | |
1518 | /* On a data extent, compute sectors to the end of the extent. */ | |
1519 | *pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); | |
5500316d PB |
1520 | } else { |
1521 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
1522 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); | |
63390a8d PB |
1523 | ret &= ~BDRV_BLOCK_DATA; |
1524 | ret |= BDRV_BLOCK_ZERO; | |
5500316d | 1525 | } |
63390a8d PB |
1526 | |
1527 | return ret; | |
5500316d PB |
1528 | } |
1529 | ||
8238010b PB |
1530 | static coroutine_fn BlockDriverAIOCB *raw_aio_discard(BlockDriverState *bs, |
1531 | int64_t sector_num, int nb_sectors, | |
1532 | BlockDriverCompletionFunc *cb, void *opaque) | |
dce512de | 1533 | { |
dce512de CH |
1534 | BDRVRawState *s = bs->opaque; |
1535 | ||
8238010b PB |
1536 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, |
1537 | cb, opaque, QEMU_AIO_DISCARD); | |
dce512de | 1538 | } |
0e7e1989 | 1539 | |
260a82e5 PB |
1540 | static int coroutine_fn raw_co_write_zeroes( |
1541 | BlockDriverState *bs, int64_t sector_num, | |
1542 | int nb_sectors, BdrvRequestFlags flags) | |
1543 | { | |
1544 | BDRVRawState *s = bs->opaque; | |
1545 | ||
1546 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1547 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1548 | QEMU_AIO_WRITE_ZEROES); | |
1549 | } else if (s->discard_zeroes) { | |
1550 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1551 | QEMU_AIO_DISCARD); | |
260a82e5 | 1552 | } |
97a2ae34 | 1553 | return -ENOTSUP; |
260a82e5 PB |
1554 | } |
1555 | ||
1556 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
1557 | { | |
1558 | BDRVRawState *s = bs->opaque; | |
1559 | ||
1560 | bdi->unallocated_blocks_are_zero = s->discard_zeroes; | |
1561 | bdi->can_write_zeroes_with_unmap = s->discard_zeroes; | |
1562 | return 0; | |
1563 | } | |
1564 | ||
6f482f74 CL |
1565 | static QemuOptsList raw_create_opts = { |
1566 | .name = "raw-create-opts", | |
1567 | .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), | |
1568 | .desc = { | |
1569 | { | |
1570 | .name = BLOCK_OPT_SIZE, | |
1571 | .type = QEMU_OPT_SIZE, | |
1572 | .help = "Virtual disk size" | |
1573 | }, | |
4ab15590 CL |
1574 | { |
1575 | .name = BLOCK_OPT_NOCOW, | |
1576 | .type = QEMU_OPT_BOOL, | |
1577 | .help = "Turn off copy-on-write (valid only on btrfs)" | |
1578 | }, | |
6f482f74 CL |
1579 | { /* end of list */ } |
1580 | } | |
0e7e1989 KW |
1581 | }; |
1582 | ||
84a12e66 CH |
1583 | static BlockDriver bdrv_file = { |
1584 | .format_name = "file", | |
1585 | .protocol_name = "file", | |
856ae5c3 | 1586 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1587 | .bdrv_needs_filename = true, |
856ae5c3 | 1588 | .bdrv_probe = NULL, /* no probe for protocols */ |
078896a9 | 1589 | .bdrv_parse_filename = raw_parse_filename, |
66f82cee | 1590 | .bdrv_file_open = raw_open, |
eeb6b45d JC |
1591 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1592 | .bdrv_reopen_commit = raw_reopen_commit, | |
1593 | .bdrv_reopen_abort = raw_reopen_abort, | |
856ae5c3 | 1594 | .bdrv_close = raw_close, |
c282e1fd | 1595 | .bdrv_create = raw_create, |
3ac21627 | 1596 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
b6b8a333 | 1597 | .bdrv_co_get_block_status = raw_co_get_block_status, |
260a82e5 | 1598 | .bdrv_co_write_zeroes = raw_co_write_zeroes, |
3b46e624 | 1599 | |
f141eafe AL |
1600 | .bdrv_aio_readv = raw_aio_readv, |
1601 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 1602 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 1603 | .bdrv_aio_discard = raw_aio_discard, |
c25f53b0 | 1604 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
1605 | .bdrv_io_plug = raw_aio_plug, |
1606 | .bdrv_io_unplug = raw_aio_unplug, | |
1607 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
3c529d93 | 1608 | |
83f64091 FB |
1609 | .bdrv_truncate = raw_truncate, |
1610 | .bdrv_getlength = raw_getlength, | |
260a82e5 | 1611 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1612 | .bdrv_get_allocated_file_size |
1613 | = raw_get_allocated_file_size, | |
0e7e1989 | 1614 | |
c2f3426c SH |
1615 | .bdrv_detach_aio_context = raw_detach_aio_context, |
1616 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
1617 | ||
6f482f74 | 1618 | .create_opts = &raw_create_opts, |
83f64091 FB |
1619 | }; |
1620 | ||
19cb3738 FB |
1621 | /***********************************************/ |
1622 | /* host device */ | |
1623 | ||
83affaa6 | 1624 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1625 | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); |
1626 | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); | |
1627 | ||
1628 | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) | |
1629 | { | |
5fafdf24 | 1630 | kern_return_t kernResult; |
19cb3738 FB |
1631 | mach_port_t masterPort; |
1632 | CFMutableDictionaryRef classesToMatch; | |
1633 | ||
1634 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
1635 | if ( KERN_SUCCESS != kernResult ) { | |
1636 | printf( "IOMasterPort returned %d\n", kernResult ); | |
1637 | } | |
3b46e624 | 1638 | |
5fafdf24 | 1639 | classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
19cb3738 FB |
1640 | if ( classesToMatch == NULL ) { |
1641 | printf( "IOServiceMatching returned a NULL dictionary.\n" ); | |
1642 | } else { | |
1643 | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); | |
1644 | } | |
1645 | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); | |
1646 | if ( KERN_SUCCESS != kernResult ) | |
1647 | { | |
1648 | printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); | |
1649 | } | |
3b46e624 | 1650 | |
19cb3738 FB |
1651 | return kernResult; |
1652 | } | |
1653 | ||
1654 | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) | |
1655 | { | |
1656 | io_object_t nextMedia; | |
1657 | kern_return_t kernResult = KERN_FAILURE; | |
1658 | *bsdPath = '\0'; | |
1659 | nextMedia = IOIteratorNext( mediaIterator ); | |
1660 | if ( nextMedia ) | |
1661 | { | |
1662 | CFTypeRef bsdPathAsCFString; | |
1663 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
1664 | if ( bsdPathAsCFString ) { | |
1665 | size_t devPathLength; | |
1666 | strcpy( bsdPath, _PATH_DEV ); | |
1667 | strcat( bsdPath, "r" ); | |
1668 | devPathLength = strlen( bsdPath ); | |
1669 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
1670 | kernResult = KERN_SUCCESS; | |
1671 | } | |
1672 | CFRelease( bsdPathAsCFString ); | |
1673 | } | |
1674 | IOObjectRelease( nextMedia ); | |
1675 | } | |
3b46e624 | 1676 | |
19cb3738 FB |
1677 | return kernResult; |
1678 | } | |
1679 | ||
1680 | #endif | |
1681 | ||
508c7cb3 CH |
1682 | static int hdev_probe_device(const char *filename) |
1683 | { | |
1684 | struct stat st; | |
1685 | ||
1686 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
1687 | if (strstart(filename, "/dev/cdrom", NULL)) | |
1688 | return 50; | |
1689 | ||
1690 | if (stat(filename, &st) >= 0 && | |
1691 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
1692 | return 100; | |
1693 | } | |
1694 | ||
1695 | return 0; | |
1696 | } | |
1697 | ||
da888d37 SH |
1698 | static int check_hdev_writable(BDRVRawState *s) |
1699 | { | |
1700 | #if defined(BLKROGET) | |
1701 | /* Linux block devices can be configured "read-only" using blockdev(8). | |
1702 | * This is independent of device node permissions and therefore open(2) | |
1703 | * with O_RDWR succeeds. Actual writes fail with EPERM. | |
1704 | * | |
1705 | * bdrv_open() is supposed to fail if the disk is read-only. Explicitly | |
1706 | * check for read-only block devices so that Linux block devices behave | |
1707 | * properly. | |
1708 | */ | |
1709 | struct stat st; | |
1710 | int readonly = 0; | |
1711 | ||
1712 | if (fstat(s->fd, &st)) { | |
1713 | return -errno; | |
1714 | } | |
1715 | ||
1716 | if (!S_ISBLK(st.st_mode)) { | |
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | if (ioctl(s->fd, BLKROGET, &readonly) < 0) { | |
1721 | return -errno; | |
1722 | } | |
1723 | ||
1724 | if (readonly) { | |
1725 | return -EACCES; | |
1726 | } | |
1727 | #endif /* defined(BLKROGET) */ | |
1728 | return 0; | |
1729 | } | |
1730 | ||
7af803d4 HR |
1731 | static void hdev_parse_filename(const char *filename, QDict *options, |
1732 | Error **errp) | |
1733 | { | |
1734 | /* The prefix is optional, just as for "file". */ | |
1735 | strstart(filename, "host_device:", &filename); | |
1736 | ||
1737 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
1738 | } | |
1739 | ||
015a1036 HR |
1740 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
1741 | Error **errp) | |
19cb3738 FB |
1742 | { |
1743 | BDRVRawState *s = bs->opaque; | |
e428e439 | 1744 | Error *local_err = NULL; |
da888d37 | 1745 | int ret; |
c66a6157 | 1746 | const char *filename = qdict_get_str(options, "filename"); |
a76bab49 | 1747 | |
83affaa6 | 1748 | #if defined(__APPLE__) && defined(__MACH__) |
19cb3738 FB |
1749 | if (strstart(filename, "/dev/cdrom", NULL)) { |
1750 | kern_return_t kernResult; | |
1751 | io_iterator_t mediaIterator; | |
1752 | char bsdPath[ MAXPATHLEN ]; | |
1753 | int fd; | |
5fafdf24 | 1754 | |
19cb3738 FB |
1755 | kernResult = FindEjectableCDMedia( &mediaIterator ); |
1756 | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); | |
3b46e624 | 1757 | |
19cb3738 FB |
1758 | if ( bsdPath[ 0 ] != '\0' ) { |
1759 | strcat(bsdPath,"s0"); | |
1760 | /* some CDs don't have a partition 0 */ | |
6165f4d8 | 1761 | fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
19cb3738 FB |
1762 | if (fd < 0) { |
1763 | bsdPath[strlen(bsdPath)-1] = '1'; | |
1764 | } else { | |
2e1e79da | 1765 | qemu_close(fd); |
19cb3738 FB |
1766 | } |
1767 | filename = bsdPath; | |
a5c5ea3f | 1768 | qdict_put(options, "filename", qstring_from_str(filename)); |
19cb3738 | 1769 | } |
3b46e624 | 1770 | |
19cb3738 FB |
1771 | if ( mediaIterator ) |
1772 | IOObjectRelease( mediaIterator ); | |
1773 | } | |
1774 | #endif | |
19cb3738 FB |
1775 | |
1776 | s->type = FTYPE_FILE; | |
4dd75c70 | 1777 | #if defined(__linux__) |
05acda4d BK |
1778 | { |
1779 | char resolved_path[ MAXPATHLEN ], *temp; | |
1780 | ||
1781 | temp = realpath(filename, resolved_path); | |
1782 | if (temp && strstart(temp, "/dev/sg", NULL)) { | |
1783 | bs->sg = 1; | |
1784 | } | |
19cb3738 FB |
1785 | } |
1786 | #endif | |
90babde0 | 1787 | |
e428e439 | 1788 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
da888d37 | 1789 | if (ret < 0) { |
84d18f06 | 1790 | if (local_err) { |
e428e439 HR |
1791 | error_propagate(errp, local_err); |
1792 | } | |
da888d37 SH |
1793 | return ret; |
1794 | } | |
1795 | ||
1796 | if (flags & BDRV_O_RDWR) { | |
1797 | ret = check_hdev_writable(s); | |
1798 | if (ret < 0) { | |
1799 | raw_close(bs); | |
e428e439 | 1800 | error_setg_errno(errp, -ret, "The device is not writable"); |
da888d37 SH |
1801 | return ret; |
1802 | } | |
1803 | } | |
1804 | ||
1805 | return ret; | |
19cb3738 FB |
1806 | } |
1807 | ||
03ff3ca3 | 1808 | #if defined(__linux__) |
19cb3738 FB |
1809 | /* Note: we do not have a reliable method to detect if the floppy is |
1810 | present. The current method is to try to open the floppy at every | |
1811 | I/O and to keep it opened during a few hundreds of ms. */ | |
1812 | static int fd_open(BlockDriverState *bs) | |
1813 | { | |
1814 | BDRVRawState *s = bs->opaque; | |
1815 | int last_media_present; | |
1816 | ||
1817 | if (s->type != FTYPE_FD) | |
1818 | return 0; | |
1819 | last_media_present = (s->fd >= 0); | |
5fafdf24 | 1820 | if (s->fd >= 0 && |
c57c846a | 1821 | (get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
2e1e79da | 1822 | qemu_close(s->fd); |
19cb3738 FB |
1823 | s->fd = -1; |
1824 | #ifdef DEBUG_FLOPPY | |
1825 | printf("Floppy closed\n"); | |
1826 | #endif | |
1827 | } | |
1828 | if (s->fd < 0) { | |
5fafdf24 | 1829 | if (s->fd_got_error && |
c57c846a | 1830 | (get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
19cb3738 FB |
1831 | #ifdef DEBUG_FLOPPY |
1832 | printf("No floppy (open delayed)\n"); | |
1833 | #endif | |
1834 | return -EIO; | |
1835 | } | |
6165f4d8 | 1836 | s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK); |
19cb3738 | 1837 | if (s->fd < 0) { |
c57c846a | 1838 | s->fd_error_time = get_clock(); |
19cb3738 FB |
1839 | s->fd_got_error = 1; |
1840 | if (last_media_present) | |
1841 | s->fd_media_changed = 1; | |
1842 | #ifdef DEBUG_FLOPPY | |
1843 | printf("No floppy\n"); | |
1844 | #endif | |
1845 | return -EIO; | |
1846 | } | |
1847 | #ifdef DEBUG_FLOPPY | |
1848 | printf("Floppy opened\n"); | |
1849 | #endif | |
1850 | } | |
1851 | if (!last_media_present) | |
1852 | s->fd_media_changed = 1; | |
c57c846a | 1853 | s->fd_open_time = get_clock(); |
19cb3738 FB |
1854 | s->fd_got_error = 0; |
1855 | return 0; | |
1856 | } | |
19cb3738 | 1857 | |
63ec93db | 1858 | static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
985a03b0 TS |
1859 | { |
1860 | BDRVRawState *s = bs->opaque; | |
1861 | ||
1862 | return ioctl(s->fd, req, buf); | |
1863 | } | |
221f715d | 1864 | |
63ec93db | 1865 | static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
221f715d AL |
1866 | unsigned long int req, void *buf, |
1867 | BlockDriverCompletionFunc *cb, void *opaque) | |
1868 | { | |
f141eafe | 1869 | BDRVRawState *s = bs->opaque; |
c208e8c2 | 1870 | RawPosixAIOData *acb; |
c4d9d196 | 1871 | ThreadPool *pool; |
221f715d | 1872 | |
f141eafe AL |
1873 | if (fd_open(bs) < 0) |
1874 | return NULL; | |
c208e8c2 PB |
1875 | |
1876 | acb = g_slice_new(RawPosixAIOData); | |
1877 | acb->bs = bs; | |
1878 | acb->aio_type = QEMU_AIO_IOCTL; | |
1879 | acb->aio_fildes = s->fd; | |
1880 | acb->aio_offset = 0; | |
1881 | acb->aio_ioctl_buf = buf; | |
1882 | acb->aio_ioctl_cmd = req; | |
c4d9d196 SH |
1883 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1884 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
221f715d AL |
1885 | } |
1886 | ||
a167ba50 | 1887 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1888 | static int fd_open(BlockDriverState *bs) |
1889 | { | |
1890 | BDRVRawState *s = bs->opaque; | |
1891 | ||
1892 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
1893 | if (s->fd >= 0) | |
1894 | return 0; | |
1895 | return -EIO; | |
1896 | } | |
9f23011a | 1897 | #else /* !linux && !FreeBSD */ |
19cb3738 | 1898 | |
08af02e2 AL |
1899 | static int fd_open(BlockDriverState *bs) |
1900 | { | |
1901 | return 0; | |
1902 | } | |
1903 | ||
221f715d | 1904 | #endif /* !linux && !FreeBSD */ |
04eeb8b6 | 1905 | |
c36dd8a0 AF |
1906 | static coroutine_fn BlockDriverAIOCB *hdev_aio_discard(BlockDriverState *bs, |
1907 | int64_t sector_num, int nb_sectors, | |
1908 | BlockDriverCompletionFunc *cb, void *opaque) | |
1909 | { | |
1910 | BDRVRawState *s = bs->opaque; | |
1911 | ||
1912 | if (fd_open(bs) < 0) { | |
1913 | return NULL; | |
1914 | } | |
1915 | return paio_submit(bs, s->fd, sector_num, NULL, nb_sectors, | |
1916 | cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
1917 | } | |
1918 | ||
d0b4503e PB |
1919 | static coroutine_fn int hdev_co_write_zeroes(BlockDriverState *bs, |
1920 | int64_t sector_num, int nb_sectors, BdrvRequestFlags flags) | |
1921 | { | |
1922 | BDRVRawState *s = bs->opaque; | |
1923 | int rc; | |
1924 | ||
1925 | rc = fd_open(bs); | |
1926 | if (rc < 0) { | |
1927 | return rc; | |
1928 | } | |
1929 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
97a2ae34 PB |
1930 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, |
1931 | QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV); | |
1932 | } else if (s->discard_zeroes) { | |
1933 | return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors, | |
1934 | QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); | |
d0b4503e | 1935 | } |
97a2ae34 | 1936 | return -ENOTSUP; |
d0b4503e PB |
1937 | } |
1938 | ||
6f482f74 | 1939 | static int hdev_create(const char *filename, QemuOpts *opts, |
d5124c00 | 1940 | Error **errp) |
93c65b47 AL |
1941 | { |
1942 | int fd; | |
1943 | int ret = 0; | |
1944 | struct stat stat_buf; | |
0e7e1989 | 1945 | int64_t total_size = 0; |
cc28c6aa HR |
1946 | bool has_prefix; |
1947 | ||
1948 | /* This function is used by all three protocol block drivers and therefore | |
1949 | * any of these three prefixes may be given. | |
1950 | * The return value has to be stored somewhere, otherwise this is an error | |
1951 | * due to -Werror=unused-value. */ | |
1952 | has_prefix = | |
1953 | strstart(filename, "host_device:", &filename) || | |
1954 | strstart(filename, "host_cdrom:" , &filename) || | |
1955 | strstart(filename, "host_floppy:", &filename); | |
1956 | ||
1957 | (void)has_prefix; | |
93c65b47 | 1958 | |
0e7e1989 | 1959 | /* Read out options */ |
6f482f74 CL |
1960 | total_size = |
1961 | qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE; | |
93c65b47 | 1962 | |
6165f4d8 | 1963 | fd = qemu_open(filename, O_WRONLY | O_BINARY); |
e428e439 HR |
1964 | if (fd < 0) { |
1965 | ret = -errno; | |
1966 | error_setg_errno(errp, -ret, "Could not open device"); | |
1967 | return ret; | |
1968 | } | |
93c65b47 | 1969 | |
e428e439 | 1970 | if (fstat(fd, &stat_buf) < 0) { |
57e69b7d | 1971 | ret = -errno; |
e428e439 HR |
1972 | error_setg_errno(errp, -ret, "Could not stat device"); |
1973 | } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) { | |
1974 | error_setg(errp, | |
1975 | "The given file is neither a block nor a character device"); | |
57e69b7d | 1976 | ret = -ENODEV; |
e428e439 HR |
1977 | } else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) { |
1978 | error_setg(errp, "Device is too small"); | |
93c65b47 | 1979 | ret = -ENOSPC; |
e428e439 | 1980 | } |
93c65b47 | 1981 | |
2e1e79da | 1982 | qemu_close(fd); |
93c65b47 AL |
1983 | return ret; |
1984 | } | |
1985 | ||
5efa9d5a | 1986 | static BlockDriver bdrv_host_device = { |
0b4ce02e | 1987 | .format_name = "host_device", |
84a12e66 | 1988 | .protocol_name = "host_device", |
0b4ce02e | 1989 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1990 | .bdrv_needs_filename = true, |
0b4ce02e | 1991 | .bdrv_probe_device = hdev_probe_device, |
7af803d4 | 1992 | .bdrv_parse_filename = hdev_parse_filename, |
66f82cee | 1993 | .bdrv_file_open = hdev_open, |
0b4ce02e | 1994 | .bdrv_close = raw_close, |
1bc6b705 JC |
1995 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1996 | .bdrv_reopen_commit = raw_reopen_commit, | |
1997 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 1998 | .bdrv_create = hdev_create, |
6f482f74 | 1999 | .create_opts = &raw_create_opts, |
d0b4503e | 2000 | .bdrv_co_write_zeroes = hdev_co_write_zeroes, |
3b46e624 | 2001 | |
f141eafe AL |
2002 | .bdrv_aio_readv = raw_aio_readv, |
2003 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2004 | .bdrv_aio_flush = raw_aio_flush, |
8238010b | 2005 | .bdrv_aio_discard = hdev_aio_discard, |
c25f53b0 | 2006 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2007 | .bdrv_io_plug = raw_aio_plug, |
2008 | .bdrv_io_unplug = raw_aio_unplug, | |
2009 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
3c529d93 | 2010 | |
55b949c8 | 2011 | .bdrv_truncate = raw_truncate, |
e60f469c | 2012 | .bdrv_getlength = raw_getlength, |
260a82e5 | 2013 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
2014 | .bdrv_get_allocated_file_size |
2015 | = raw_get_allocated_file_size, | |
19cb3738 | 2016 | |
c2f3426c SH |
2017 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2018 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2019 | ||
f3a5d3f8 | 2020 | /* generic scsi device */ |
63ec93db CH |
2021 | #ifdef __linux__ |
2022 | .bdrv_ioctl = hdev_ioctl, | |
63ec93db CH |
2023 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
2024 | #endif | |
f3a5d3f8 CH |
2025 | }; |
2026 | ||
2027 | #ifdef __linux__ | |
d3f49845 HR |
2028 | static void floppy_parse_filename(const char *filename, QDict *options, |
2029 | Error **errp) | |
2030 | { | |
2031 | /* The prefix is optional, just as for "file". */ | |
2032 | strstart(filename, "host_floppy:", &filename); | |
2033 | ||
2034 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
2035 | } | |
2036 | ||
015a1036 HR |
2037 | static int floppy_open(BlockDriverState *bs, QDict *options, int flags, |
2038 | Error **errp) | |
f3a5d3f8 CH |
2039 | { |
2040 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2041 | Error *local_err = NULL; |
f3a5d3f8 CH |
2042 | int ret; |
2043 | ||
f3a5d3f8 | 2044 | s->type = FTYPE_FD; |
f3a5d3f8 | 2045 | |
19a3da7f | 2046 | /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ |
e428e439 HR |
2047 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
2048 | if (ret) { | |
84d18f06 | 2049 | if (local_err) { |
e428e439 HR |
2050 | error_propagate(errp, local_err); |
2051 | } | |
f3a5d3f8 | 2052 | return ret; |
e428e439 | 2053 | } |
f3a5d3f8 CH |
2054 | |
2055 | /* close fd so that we can reopen it as needed */ | |
2e1e79da | 2056 | qemu_close(s->fd); |
f3a5d3f8 CH |
2057 | s->fd = -1; |
2058 | s->fd_media_changed = 1; | |
2059 | ||
2060 | return 0; | |
2061 | } | |
2062 | ||
508c7cb3 CH |
2063 | static int floppy_probe_device(const char *filename) |
2064 | { | |
2ebf7c4b CR |
2065 | int fd, ret; |
2066 | int prio = 0; | |
2067 | struct floppy_struct fdparam; | |
343f8568 | 2068 | struct stat st; |
2ebf7c4b | 2069 | |
e1740828 CB |
2070 | if (strstart(filename, "/dev/fd", NULL) && |
2071 | !strstart(filename, "/dev/fdset/", NULL)) { | |
2ebf7c4b | 2072 | prio = 50; |
e1740828 | 2073 | } |
2ebf7c4b | 2074 | |
6165f4d8 | 2075 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
2ebf7c4b CR |
2076 | if (fd < 0) { |
2077 | goto out; | |
2078 | } | |
343f8568 JS |
2079 | ret = fstat(fd, &st); |
2080 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
2081 | goto outc; | |
2082 | } | |
2ebf7c4b CR |
2083 | |
2084 | /* Attempt to detect via a floppy specific ioctl */ | |
2085 | ret = ioctl(fd, FDGETPRM, &fdparam); | |
2086 | if (ret >= 0) | |
2087 | prio = 100; | |
2088 | ||
343f8568 | 2089 | outc: |
2e1e79da | 2090 | qemu_close(fd); |
2ebf7c4b CR |
2091 | out: |
2092 | return prio; | |
508c7cb3 CH |
2093 | } |
2094 | ||
2095 | ||
f3a5d3f8 CH |
2096 | static int floppy_is_inserted(BlockDriverState *bs) |
2097 | { | |
2098 | return fd_open(bs) >= 0; | |
2099 | } | |
2100 | ||
2101 | static int floppy_media_changed(BlockDriverState *bs) | |
2102 | { | |
2103 | BDRVRawState *s = bs->opaque; | |
2104 | int ret; | |
2105 | ||
2106 | /* | |
2107 | * XXX: we do not have a true media changed indication. | |
2108 | * It does not work if the floppy is changed without trying to read it. | |
2109 | */ | |
2110 | fd_open(bs); | |
2111 | ret = s->fd_media_changed; | |
2112 | s->fd_media_changed = 0; | |
2113 | #ifdef DEBUG_FLOPPY | |
2114 | printf("Floppy changed=%d\n", ret); | |
2115 | #endif | |
2116 | return ret; | |
2117 | } | |
2118 | ||
f36f3949 | 2119 | static void floppy_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2120 | { |
2121 | BDRVRawState *s = bs->opaque; | |
2122 | int fd; | |
2123 | ||
2124 | if (s->fd >= 0) { | |
2e1e79da | 2125 | qemu_close(s->fd); |
f3a5d3f8 CH |
2126 | s->fd = -1; |
2127 | } | |
6165f4d8 | 2128 | fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK); |
f3a5d3f8 CH |
2129 | if (fd >= 0) { |
2130 | if (ioctl(fd, FDEJECT, 0) < 0) | |
2131 | perror("FDEJECT"); | |
2e1e79da | 2132 | qemu_close(fd); |
f3a5d3f8 | 2133 | } |
f3a5d3f8 CH |
2134 | } |
2135 | ||
2136 | static BlockDriver bdrv_host_floppy = { | |
2137 | .format_name = "host_floppy", | |
84a12e66 | 2138 | .protocol_name = "host_floppy", |
f3a5d3f8 | 2139 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2140 | .bdrv_needs_filename = true, |
508c7cb3 | 2141 | .bdrv_probe_device = floppy_probe_device, |
d3f49845 | 2142 | .bdrv_parse_filename = floppy_parse_filename, |
66f82cee | 2143 | .bdrv_file_open = floppy_open, |
f3a5d3f8 | 2144 | .bdrv_close = raw_close, |
1bc6b705 JC |
2145 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2146 | .bdrv_reopen_commit = raw_reopen_commit, | |
2147 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2148 | .bdrv_create = hdev_create, |
6f482f74 | 2149 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2150 | |
f3a5d3f8 CH |
2151 | .bdrv_aio_readv = raw_aio_readv, |
2152 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2153 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2154 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2155 | .bdrv_io_plug = raw_aio_plug, |
2156 | .bdrv_io_unplug = raw_aio_unplug, | |
2157 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
f3a5d3f8 | 2158 | |
55b949c8 | 2159 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2160 | .bdrv_getlength = raw_getlength, |
2161 | .has_variable_length = true, | |
4a1d5e1f FZ |
2162 | .bdrv_get_allocated_file_size |
2163 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2164 | |
c2f3426c SH |
2165 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2166 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2167 | ||
f3a5d3f8 CH |
2168 | /* removable device support */ |
2169 | .bdrv_is_inserted = floppy_is_inserted, | |
2170 | .bdrv_media_changed = floppy_media_changed, | |
2171 | .bdrv_eject = floppy_eject, | |
f3a5d3f8 | 2172 | }; |
18fa1c42 | 2173 | #endif |
f3a5d3f8 | 2174 | |
18fa1c42 HR |
2175 | #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
2176 | static void cdrom_parse_filename(const char *filename, QDict *options, | |
2177 | Error **errp) | |
2178 | { | |
2179 | /* The prefix is optional, just as for "file". */ | |
2180 | strstart(filename, "host_cdrom:", &filename); | |
2181 | ||
2182 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
2183 | } | |
2184 | #endif | |
2185 | ||
2186 | #ifdef __linux__ | |
015a1036 HR |
2187 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2188 | Error **errp) | |
f3a5d3f8 CH |
2189 | { |
2190 | BDRVRawState *s = bs->opaque; | |
e428e439 HR |
2191 | Error *local_err = NULL; |
2192 | int ret; | |
f3a5d3f8 | 2193 | |
f3a5d3f8 CH |
2194 | s->type = FTYPE_CD; |
2195 | ||
19a3da7f | 2196 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
e428e439 | 2197 | ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err); |
84d18f06 | 2198 | if (local_err) { |
e428e439 HR |
2199 | error_propagate(errp, local_err); |
2200 | } | |
2201 | return ret; | |
f3a5d3f8 CH |
2202 | } |
2203 | ||
508c7cb3 CH |
2204 | static int cdrom_probe_device(const char *filename) |
2205 | { | |
3baf720e CR |
2206 | int fd, ret; |
2207 | int prio = 0; | |
343f8568 | 2208 | struct stat st; |
3baf720e | 2209 | |
6165f4d8 | 2210 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
3baf720e CR |
2211 | if (fd < 0) { |
2212 | goto out; | |
2213 | } | |
343f8568 JS |
2214 | ret = fstat(fd, &st); |
2215 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
2216 | goto outc; | |
2217 | } | |
3baf720e CR |
2218 | |
2219 | /* Attempt to detect via a CDROM specific ioctl */ | |
2220 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2221 | if (ret >= 0) | |
2222 | prio = 100; | |
2223 | ||
343f8568 | 2224 | outc: |
2e1e79da | 2225 | qemu_close(fd); |
3baf720e CR |
2226 | out: |
2227 | return prio; | |
508c7cb3 CH |
2228 | } |
2229 | ||
f3a5d3f8 CH |
2230 | static int cdrom_is_inserted(BlockDriverState *bs) |
2231 | { | |
2232 | BDRVRawState *s = bs->opaque; | |
2233 | int ret; | |
2234 | ||
2235 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2236 | if (ret == CDS_DISC_OK) | |
2237 | return 1; | |
2238 | return 0; | |
2239 | } | |
2240 | ||
f36f3949 | 2241 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2242 | { |
2243 | BDRVRawState *s = bs->opaque; | |
2244 | ||
2245 | if (eject_flag) { | |
2246 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
2247 | perror("CDROMEJECT"); | |
2248 | } else { | |
2249 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
2250 | perror("CDROMEJECT"); | |
2251 | } | |
f3a5d3f8 CH |
2252 | } |
2253 | ||
025e849a | 2254 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2255 | { |
2256 | BDRVRawState *s = bs->opaque; | |
2257 | ||
2258 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
2259 | /* | |
2260 | * Note: an error can happen if the distribution automatically | |
2261 | * mounts the CD-ROM | |
2262 | */ | |
2263 | /* perror("CDROM_LOCKDOOR"); */ | |
2264 | } | |
f3a5d3f8 CH |
2265 | } |
2266 | ||
2267 | static BlockDriver bdrv_host_cdrom = { | |
2268 | .format_name = "host_cdrom", | |
84a12e66 | 2269 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2270 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2271 | .bdrv_needs_filename = true, |
508c7cb3 | 2272 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2273 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2274 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2275 | .bdrv_close = raw_close, |
1bc6b705 JC |
2276 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2277 | .bdrv_reopen_commit = raw_reopen_commit, | |
2278 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2279 | .bdrv_create = hdev_create, |
6f482f74 | 2280 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2281 | |
f3a5d3f8 CH |
2282 | .bdrv_aio_readv = raw_aio_readv, |
2283 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2284 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2285 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2286 | .bdrv_io_plug = raw_aio_plug, |
2287 | .bdrv_io_unplug = raw_aio_unplug, | |
2288 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
f3a5d3f8 | 2289 | |
55b949c8 | 2290 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2291 | .bdrv_getlength = raw_getlength, |
2292 | .has_variable_length = true, | |
4a1d5e1f FZ |
2293 | .bdrv_get_allocated_file_size |
2294 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2295 | |
c2f3426c SH |
2296 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2297 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2298 | ||
f3a5d3f8 CH |
2299 | /* removable device support */ |
2300 | .bdrv_is_inserted = cdrom_is_inserted, | |
2301 | .bdrv_eject = cdrom_eject, | |
025e849a | 2302 | .bdrv_lock_medium = cdrom_lock_medium, |
f3a5d3f8 CH |
2303 | |
2304 | /* generic scsi device */ | |
63ec93db | 2305 | .bdrv_ioctl = hdev_ioctl, |
63ec93db | 2306 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
f3a5d3f8 CH |
2307 | }; |
2308 | #endif /* __linux__ */ | |
2309 | ||
a167ba50 | 2310 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
511018e4 AT |
2311 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2312 | Error **errp) | |
f3a5d3f8 CH |
2313 | { |
2314 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2315 | Error *local_err = NULL; |
f3a5d3f8 CH |
2316 | int ret; |
2317 | ||
2318 | s->type = FTYPE_CD; | |
2319 | ||
e428e439 HR |
2320 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
2321 | if (ret) { | |
84d18f06 | 2322 | if (local_err) { |
e428e439 HR |
2323 | error_propagate(errp, local_err); |
2324 | } | |
f3a5d3f8 | 2325 | return ret; |
e428e439 | 2326 | } |
f3a5d3f8 | 2327 | |
9b2260cb | 2328 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2329 | ioctl(s->fd, CDIOCALLOW); |
2330 | return 0; | |
2331 | } | |
2332 | ||
508c7cb3 CH |
2333 | static int cdrom_probe_device(const char *filename) |
2334 | { | |
2335 | if (strstart(filename, "/dev/cd", NULL) || | |
2336 | strstart(filename, "/dev/acd", NULL)) | |
2337 | return 100; | |
2338 | return 0; | |
2339 | } | |
2340 | ||
f3a5d3f8 CH |
2341 | static int cdrom_reopen(BlockDriverState *bs) |
2342 | { | |
2343 | BDRVRawState *s = bs->opaque; | |
2344 | int fd; | |
2345 | ||
2346 | /* | |
2347 | * Force reread of possibly changed/newly loaded disc, | |
2348 | * FreeBSD seems to not notice sometimes... | |
2349 | */ | |
2350 | if (s->fd >= 0) | |
2e1e79da | 2351 | qemu_close(s->fd); |
6165f4d8 | 2352 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
f3a5d3f8 CH |
2353 | if (fd < 0) { |
2354 | s->fd = -1; | |
2355 | return -EIO; | |
2356 | } | |
2357 | s->fd = fd; | |
2358 | ||
9b2260cb | 2359 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2360 | ioctl(s->fd, CDIOCALLOW); |
2361 | return 0; | |
2362 | } | |
2363 | ||
2364 | static int cdrom_is_inserted(BlockDriverState *bs) | |
2365 | { | |
2366 | return raw_getlength(bs) > 0; | |
2367 | } | |
2368 | ||
f36f3949 | 2369 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2370 | { |
2371 | BDRVRawState *s = bs->opaque; | |
2372 | ||
2373 | if (s->fd < 0) | |
822e1cd1 | 2374 | return; |
f3a5d3f8 CH |
2375 | |
2376 | (void) ioctl(s->fd, CDIOCALLOW); | |
2377 | ||
2378 | if (eject_flag) { | |
2379 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
2380 | perror("CDIOCEJECT"); | |
2381 | } else { | |
2382 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
2383 | perror("CDIOCCLOSE"); | |
2384 | } | |
2385 | ||
822e1cd1 | 2386 | cdrom_reopen(bs); |
f3a5d3f8 CH |
2387 | } |
2388 | ||
025e849a | 2389 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2390 | { |
2391 | BDRVRawState *s = bs->opaque; | |
2392 | ||
2393 | if (s->fd < 0) | |
7bf37fed | 2394 | return; |
f3a5d3f8 CH |
2395 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
2396 | /* | |
2397 | * Note: an error can happen if the distribution automatically | |
2398 | * mounts the CD-ROM | |
2399 | */ | |
2400 | /* perror("CDROM_LOCKDOOR"); */ | |
2401 | } | |
f3a5d3f8 CH |
2402 | } |
2403 | ||
2404 | static BlockDriver bdrv_host_cdrom = { | |
2405 | .format_name = "host_cdrom", | |
84a12e66 | 2406 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2407 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2408 | .bdrv_needs_filename = true, |
508c7cb3 | 2409 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2410 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2411 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2412 | .bdrv_close = raw_close, |
1bc6b705 JC |
2413 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2414 | .bdrv_reopen_commit = raw_reopen_commit, | |
2415 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2416 | .bdrv_create = hdev_create, |
6f482f74 | 2417 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2418 | |
f3a5d3f8 CH |
2419 | .bdrv_aio_readv = raw_aio_readv, |
2420 | .bdrv_aio_writev = raw_aio_writev, | |
b2e12bc6 | 2421 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2422 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2423 | .bdrv_io_plug = raw_aio_plug, |
2424 | .bdrv_io_unplug = raw_aio_unplug, | |
2425 | .bdrv_flush_io_queue = raw_aio_flush_io_queue, | |
f3a5d3f8 | 2426 | |
55b949c8 | 2427 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2428 | .bdrv_getlength = raw_getlength, |
2429 | .has_variable_length = true, | |
4a1d5e1f FZ |
2430 | .bdrv_get_allocated_file_size |
2431 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2432 | |
c2f3426c SH |
2433 | .bdrv_detach_aio_context = raw_detach_aio_context, |
2434 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
2435 | ||
19cb3738 | 2436 | /* removable device support */ |
f3a5d3f8 CH |
2437 | .bdrv_is_inserted = cdrom_is_inserted, |
2438 | .bdrv_eject = cdrom_eject, | |
025e849a | 2439 | .bdrv_lock_medium = cdrom_lock_medium, |
19cb3738 | 2440 | }; |
f3a5d3f8 | 2441 | #endif /* __FreeBSD__ */ |
5efa9d5a | 2442 | |
84a12e66 | 2443 | static void bdrv_file_init(void) |
5efa9d5a | 2444 | { |
508c7cb3 CH |
2445 | /* |
2446 | * Register all the drivers. Note that order is important, the driver | |
2447 | * registered last will get probed first. | |
2448 | */ | |
84a12e66 | 2449 | bdrv_register(&bdrv_file); |
5efa9d5a | 2450 | bdrv_register(&bdrv_host_device); |
f3a5d3f8 CH |
2451 | #ifdef __linux__ |
2452 | bdrv_register(&bdrv_host_floppy); | |
2453 | bdrv_register(&bdrv_host_cdrom); | |
2454 | #endif | |
a167ba50 | 2455 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
2456 | bdrv_register(&bdrv_host_cdrom); |
2457 | #endif | |
5efa9d5a AL |
2458 | } |
2459 | ||
84a12e66 | 2460 | block_init(bdrv_file_init); |