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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 | */ | |
80c71a24 | 24 | #include "qemu/osdep.h" |
da34e65c | 25 | #include "qapi/error.h" |
f348b6d1 | 26 | #include "qemu/cutils.h" |
d49b6836 | 27 | #include "qemu/error-report.h" |
1de7afc9 PB |
28 | #include "qemu/timer.h" |
29 | #include "qemu/log.h" | |
737e150e | 30 | #include "block/block_int.h" |
1de7afc9 | 31 | #include "qemu/module.h" |
de81a169 | 32 | #include "trace.h" |
737e150e | 33 | #include "block/thread-pool.h" |
1de7afc9 | 34 | #include "qemu/iov.h" |
0187f5c9 | 35 | #include "block/raw-aio.h" |
06247428 | 36 | #include "qapi/util.h" |
d49b6836 | 37 | #include "qapi/qmp/qstring.h" |
83f64091 | 38 | |
83affaa6 | 39 | #if defined(__APPLE__) && (__MACH__) |
83f64091 FB |
40 | #include <paths.h> |
41 | #include <sys/param.h> | |
42 | #include <IOKit/IOKitLib.h> | |
43 | #include <IOKit/IOBSD.h> | |
44 | #include <IOKit/storage/IOMediaBSDClient.h> | |
45 | #include <IOKit/storage/IOMedia.h> | |
46 | #include <IOKit/storage/IOCDMedia.h> | |
47 | //#include <IOKit/storage/IOCDTypes.h> | |
d0855f12 | 48 | #include <IOKit/storage/IODVDMedia.h> |
83f64091 FB |
49 | #include <CoreFoundation/CoreFoundation.h> |
50 | #endif | |
51 | ||
52 | #ifdef __sun__ | |
2e9671da | 53 | #define _POSIX_PTHREAD_SEMANTICS 1 |
83f64091 FB |
54 | #include <sys/dkio.h> |
55 | #endif | |
19cb3738 FB |
56 | #ifdef __linux__ |
57 | #include <sys/ioctl.h> | |
05acda4d | 58 | #include <sys/param.h> |
19cb3738 FB |
59 | #include <linux/cdrom.h> |
60 | #include <linux/fd.h> | |
5500316d | 61 | #include <linux/fs.h> |
1a9335e4 | 62 | #include <linux/hdreg.h> |
3307ed7b | 63 | #include <scsi/sg.h> |
1a9335e4 ET |
64 | #ifdef __s390__ |
65 | #include <asm/dasd.h> | |
66 | #endif | |
4ab15590 CL |
67 | #ifndef FS_NOCOW_FL |
68 | #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ | |
69 | #endif | |
5500316d | 70 | #endif |
b953f075 | 71 | #if defined(CONFIG_FALLOCATE_PUNCH_HOLE) || defined(CONFIG_FALLOCATE_ZERO_RANGE) |
3d4fa43e KK |
72 | #include <linux/falloc.h> |
73 | #endif | |
a167ba50 | 74 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
1cb6c3fd | 75 | #include <sys/disk.h> |
9f23011a | 76 | #include <sys/cdio.h> |
1cb6c3fd | 77 | #endif |
83f64091 | 78 | |
128ab2ff BS |
79 | #ifdef __OpenBSD__ |
80 | #include <sys/ioctl.h> | |
81 | #include <sys/disklabel.h> | |
82 | #include <sys/dkio.h> | |
83 | #endif | |
84 | ||
d1f6fd8d CE |
85 | #ifdef __NetBSD__ |
86 | #include <sys/ioctl.h> | |
87 | #include <sys/disklabel.h> | |
88 | #include <sys/dkio.h> | |
89 | #include <sys/disk.h> | |
90 | #endif | |
91 | ||
c5e97233 BS |
92 | #ifdef __DragonFly__ |
93 | #include <sys/ioctl.h> | |
94 | #include <sys/diskslice.h> | |
95 | #endif | |
96 | ||
dce512de CH |
97 | #ifdef CONFIG_XFS |
98 | #include <xfs/xfs.h> | |
99 | #endif | |
100 | ||
faf07963 | 101 | //#define DEBUG_BLOCK |
bcb22555 DA |
102 | |
103 | #ifdef DEBUG_BLOCK | |
104 | # define DEBUG_BLOCK_PRINT 1 | |
8c05dbf9 | 105 | #else |
bcb22555 | 106 | # define DEBUG_BLOCK_PRINT 0 |
8c05dbf9 | 107 | #endif |
bcb22555 DA |
108 | #define DPRINTF(fmt, ...) \ |
109 | do { \ | |
110 | if (DEBUG_BLOCK_PRINT) { \ | |
111 | printf(fmt, ## __VA_ARGS__); \ | |
112 | } \ | |
113 | } while (0) | |
8c05dbf9 | 114 | |
f6465578 AL |
115 | /* OS X does not have O_DSYNC */ |
116 | #ifndef O_DSYNC | |
1c27a8b3 | 117 | #ifdef O_SYNC |
7ab064d2 | 118 | #define O_DSYNC O_SYNC |
1c27a8b3 JA |
119 | #elif defined(O_FSYNC) |
120 | #define O_DSYNC O_FSYNC | |
121 | #endif | |
f6465578 AL |
122 | #endif |
123 | ||
9f7965c7 AL |
124 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
125 | #ifndef O_DIRECT | |
126 | #define O_DIRECT O_DSYNC | |
127 | #endif | |
128 | ||
19cb3738 FB |
129 | #define FTYPE_FILE 0 |
130 | #define FTYPE_CD 1 | |
83f64091 | 131 | |
581b9e29 CH |
132 | #define MAX_BLOCKSIZE 4096 |
133 | ||
19cb3738 FB |
134 | typedef struct BDRVRawState { |
135 | int fd; | |
136 | int type; | |
0e1d8f4c | 137 | int open_flags; |
c25f53b0 PB |
138 | size_t buf_align; |
139 | ||
dce512de | 140 | #ifdef CONFIG_XFS |
260a82e5 | 141 | bool is_xfs:1; |
dce512de | 142 | #endif |
260a82e5 | 143 | bool has_discard:1; |
97a2ae34 | 144 | bool has_write_zeroes:1; |
260a82e5 | 145 | bool discard_zeroes:1; |
0a4279d9 | 146 | bool use_linux_aio:1; |
e5bcf967 | 147 | bool page_cache_inconsistent:1; |
d50d8222 | 148 | bool has_fallocate; |
3cad8307 | 149 | bool needs_alignment; |
19cb3738 FB |
150 | } BDRVRawState; |
151 | ||
eeb6b45d JC |
152 | typedef struct BDRVRawReopenState { |
153 | int fd; | |
154 | int open_flags; | |
eeb6b45d JC |
155 | } BDRVRawReopenState; |
156 | ||
19cb3738 | 157 | static int fd_open(BlockDriverState *bs); |
22afa7b5 | 158 | static int64_t raw_getlength(BlockDriverState *bs); |
83f64091 | 159 | |
de81a169 PB |
160 | typedef struct RawPosixAIOData { |
161 | BlockDriverState *bs; | |
162 | int aio_fildes; | |
163 | union { | |
164 | struct iovec *aio_iov; | |
165 | void *aio_ioctl_buf; | |
166 | }; | |
167 | int aio_niov; | |
8238010b | 168 | uint64_t aio_nbytes; |
de81a169 PB |
169 | #define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */ |
170 | off_t aio_offset; | |
171 | int aio_type; | |
172 | } RawPosixAIOData; | |
173 | ||
a167ba50 | 174 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 | 175 | static int cdrom_reopen(BlockDriverState *bs); |
9f23011a BS |
176 | #endif |
177 | ||
1de1ae0a CE |
178 | #if defined(__NetBSD__) |
179 | static int raw_normalize_devicepath(const char **filename) | |
180 | { | |
181 | static char namebuf[PATH_MAX]; | |
182 | const char *dp, *fname; | |
183 | struct stat sb; | |
184 | ||
185 | fname = *filename; | |
186 | dp = strrchr(fname, '/'); | |
187 | if (lstat(fname, &sb) < 0) { | |
188 | fprintf(stderr, "%s: stat failed: %s\n", | |
189 | fname, strerror(errno)); | |
190 | return -errno; | |
191 | } | |
192 | ||
193 | if (!S_ISBLK(sb.st_mode)) { | |
194 | return 0; | |
195 | } | |
196 | ||
197 | if (dp == NULL) { | |
198 | snprintf(namebuf, PATH_MAX, "r%s", fname); | |
199 | } else { | |
200 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", | |
201 | (int)(dp - fname), fname, dp + 1); | |
202 | } | |
203 | fprintf(stderr, "%s is a block device", fname); | |
204 | *filename = namebuf; | |
205 | fprintf(stderr, ", using %s\n", *filename); | |
206 | ||
207 | return 0; | |
208 | } | |
209 | #else | |
210 | static int raw_normalize_devicepath(const char **filename) | |
211 | { | |
212 | return 0; | |
213 | } | |
214 | #endif | |
215 | ||
8a4ed0d1 ET |
216 | /* |
217 | * Get logical block size via ioctl. On success store it in @sector_size_p. | |
218 | */ | |
219 | static int probe_logical_blocksize(int fd, unsigned int *sector_size_p) | |
c25f53b0 | 220 | { |
c25f53b0 | 221 | unsigned int sector_size; |
8a4ed0d1 | 222 | bool success = false; |
700f9ce0 | 223 | int i; |
c25f53b0 | 224 | |
8a4ed0d1 | 225 | errno = ENOTSUP; |
700f9ce0 | 226 | static const unsigned long ioctl_list[] = { |
c25f53b0 | 227 | #ifdef BLKSSZGET |
700f9ce0 | 228 | BLKSSZGET, |
c25f53b0 PB |
229 | #endif |
230 | #ifdef DKIOCGETBLOCKSIZE | |
700f9ce0 | 231 | DKIOCGETBLOCKSIZE, |
c25f53b0 PB |
232 | #endif |
233 | #ifdef DIOCGSECTORSIZE | |
700f9ce0 | 234 | DIOCGSECTORSIZE, |
c25f53b0 | 235 | #endif |
700f9ce0 PM |
236 | }; |
237 | ||
238 | /* Try a few ioctls to get the right size */ | |
239 | for (i = 0; i < (int)ARRAY_SIZE(ioctl_list); i++) { | |
240 | if (ioctl(fd, ioctl_list[i], §or_size) >= 0) { | |
241 | *sector_size_p = sector_size; | |
242 | success = true; | |
243 | } | |
244 | } | |
8a4ed0d1 ET |
245 | |
246 | return success ? 0 : -errno; | |
247 | } | |
248 | ||
1a9335e4 ET |
249 | /** |
250 | * Get physical block size of @fd. | |
251 | * On success, store it in @blk_size and return 0. | |
252 | * On failure, return -errno. | |
253 | */ | |
254 | static int probe_physical_blocksize(int fd, unsigned int *blk_size) | |
255 | { | |
256 | #ifdef BLKPBSZGET | |
257 | if (ioctl(fd, BLKPBSZGET, blk_size) < 0) { | |
258 | return -errno; | |
259 | } | |
260 | return 0; | |
261 | #else | |
262 | return -ENOTSUP; | |
263 | #endif | |
264 | } | |
265 | ||
22d182e8 SH |
266 | /* Check if read is allowed with given memory buffer and length. |
267 | * | |
268 | * This function is used to check O_DIRECT memory buffer and request alignment. | |
269 | */ | |
270 | static bool raw_is_io_aligned(int fd, void *buf, size_t len) | |
271 | { | |
272 | ssize_t ret = pread(fd, buf, len, 0); | |
273 | ||
274 | if (ret >= 0) { | |
275 | return true; | |
276 | } | |
277 | ||
278 | #ifdef __linux__ | |
279 | /* The Linux kernel returns EINVAL for misaligned O_DIRECT reads. Ignore | |
280 | * other errors (e.g. real I/O error), which could happen on a failed | |
281 | * drive, since we only care about probing alignment. | |
282 | */ | |
283 | if (errno != EINVAL) { | |
284 | return true; | |
285 | } | |
286 | #endif | |
287 | ||
288 | return false; | |
289 | } | |
290 | ||
8a4ed0d1 ET |
291 | static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp) |
292 | { | |
293 | BDRVRawState *s = bs->opaque; | |
294 | char *buf; | |
459b4e66 | 295 | size_t max_align = MAX(MAX_BLOCKSIZE, getpagesize()); |
8a4ed0d1 | 296 | |
b192af8a | 297 | /* For SCSI generic devices the alignment is not really used. |
8a4ed0d1 | 298 | With buffered I/O, we don't have any restrictions. */ |
b192af8a | 299 | if (bdrv_is_sg(bs) || !s->needs_alignment) { |
a5b8dd2c | 300 | bs->bl.request_alignment = 1; |
8a4ed0d1 ET |
301 | s->buf_align = 1; |
302 | return; | |
303 | } | |
304 | ||
a5b8dd2c | 305 | bs->bl.request_alignment = 0; |
8a4ed0d1 ET |
306 | s->buf_align = 0; |
307 | /* Let's try to use the logical blocksize for the alignment. */ | |
a5b8dd2c EB |
308 | if (probe_logical_blocksize(fd, &bs->bl.request_alignment) < 0) { |
309 | bs->bl.request_alignment = 0; | |
8a4ed0d1 | 310 | } |
c25f53b0 PB |
311 | #ifdef CONFIG_XFS |
312 | if (s->is_xfs) { | |
313 | struct dioattr da; | |
df26a350 | 314 | if (xfsctl(NULL, fd, XFS_IOC_DIOINFO, &da) >= 0) { |
a5b8dd2c | 315 | bs->bl.request_alignment = da.d_miniosz; |
c25f53b0 PB |
316 | /* The kernel returns wrong information for d_mem */ |
317 | /* s->buf_align = da.d_mem; */ | |
318 | } | |
319 | } | |
320 | #endif | |
321 | ||
322 | /* If we could not get the sizes so far, we can only guess them */ | |
323 | if (!s->buf_align) { | |
324 | size_t align; | |
459b4e66 DL |
325 | buf = qemu_memalign(max_align, 2 * max_align); |
326 | for (align = 512; align <= max_align; align <<= 1) { | |
327 | if (raw_is_io_aligned(fd, buf + align, max_align)) { | |
c25f53b0 PB |
328 | s->buf_align = align; |
329 | break; | |
330 | } | |
331 | } | |
332 | qemu_vfree(buf); | |
333 | } | |
334 | ||
a5b8dd2c | 335 | if (!bs->bl.request_alignment) { |
c25f53b0 | 336 | size_t align; |
459b4e66 DL |
337 | buf = qemu_memalign(s->buf_align, max_align); |
338 | for (align = 512; align <= max_align; align <<= 1) { | |
22d182e8 | 339 | if (raw_is_io_aligned(fd, buf, align)) { |
a5b8dd2c | 340 | bs->bl.request_alignment = align; |
c25f53b0 PB |
341 | break; |
342 | } | |
343 | } | |
344 | qemu_vfree(buf); | |
345 | } | |
df26a350 | 346 | |
a5b8dd2c | 347 | if (!s->buf_align || !bs->bl.request_alignment) { |
8cc9c6e9 EB |
348 | error_setg(errp, "Could not find working O_DIRECT alignment"); |
349 | error_append_hint(errp, "Try cache.direct=off\n"); | |
df26a350 | 350 | } |
c25f53b0 PB |
351 | } |
352 | ||
6a8dc042 JC |
353 | static void raw_parse_flags(int bdrv_flags, int *open_flags) |
354 | { | |
355 | assert(open_flags != NULL); | |
356 | ||
357 | *open_flags |= O_BINARY; | |
358 | *open_flags &= ~O_ACCMODE; | |
359 | if (bdrv_flags & BDRV_O_RDWR) { | |
360 | *open_flags |= O_RDWR; | |
361 | } else { | |
362 | *open_flags |= O_RDONLY; | |
363 | } | |
364 | ||
365 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
366 | * and O_DIRECT for no caching. */ | |
367 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
368 | *open_flags |= O_DIRECT; | |
369 | } | |
6a8dc042 JC |
370 | } |
371 | ||
078896a9 HR |
372 | static void raw_parse_filename(const char *filename, QDict *options, |
373 | Error **errp) | |
374 | { | |
375 | /* The filename does not have to be prefixed by the protocol name, since | |
376 | * "file" is the default protocol; therefore, the return value of this | |
377 | * function call can be ignored. */ | |
378 | strstart(filename, "file:", &filename); | |
379 | ||
380 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
381 | } | |
382 | ||
c66a6157 KW |
383 | static QemuOptsList raw_runtime_opts = { |
384 | .name = "raw", | |
385 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
386 | .desc = { | |
387 | { | |
388 | .name = "filename", | |
389 | .type = QEMU_OPT_STRING, | |
390 | .help = "File name of the image", | |
391 | }, | |
0a4279d9 KW |
392 | { |
393 | .name = "aio", | |
394 | .type = QEMU_OPT_STRING, | |
395 | .help = "host AIO implementation (threads, native)", | |
396 | }, | |
c66a6157 KW |
397 | { /* end of list */ } |
398 | }, | |
399 | }; | |
400 | ||
401 | static int raw_open_common(BlockDriverState *bs, QDict *options, | |
e428e439 | 402 | int bdrv_flags, int open_flags, Error **errp) |
83f64091 FB |
403 | { |
404 | BDRVRawState *s = bs->opaque; | |
c66a6157 KW |
405 | QemuOpts *opts; |
406 | Error *local_err = NULL; | |
8bfea15d | 407 | const char *filename = NULL; |
0a4279d9 | 408 | BlockdevAioOptions aio, aio_default; |
0e1d8f4c | 409 | int fd, ret; |
260a82e5 | 410 | struct stat st; |
83f64091 | 411 | |
87ea75d5 | 412 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
c66a6157 | 413 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 414 | if (local_err) { |
e428e439 | 415 | error_propagate(errp, local_err); |
c66a6157 KW |
416 | ret = -EINVAL; |
417 | goto fail; | |
418 | } | |
419 | ||
420 | filename = qemu_opt_get(opts, "filename"); | |
421 | ||
1de1ae0a CE |
422 | ret = raw_normalize_devicepath(&filename); |
423 | if (ret != 0) { | |
e428e439 | 424 | error_setg_errno(errp, -ret, "Could not normalize device path"); |
c66a6157 | 425 | goto fail; |
1de1ae0a CE |
426 | } |
427 | ||
0a4279d9 KW |
428 | aio_default = (bdrv_flags & BDRV_O_NATIVE_AIO) |
429 | ? BLOCKDEV_AIO_OPTIONS_NATIVE | |
430 | : BLOCKDEV_AIO_OPTIONS_THREADS; | |
431 | aio = qapi_enum_parse(BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"), | |
432 | BLOCKDEV_AIO_OPTIONS__MAX, aio_default, &local_err); | |
433 | if (local_err) { | |
434 | error_propagate(errp, local_err); | |
435 | ret = -EINVAL; | |
436 | goto fail; | |
437 | } | |
438 | s->use_linux_aio = (aio == BLOCKDEV_AIO_OPTIONS_NATIVE); | |
439 | ||
6a8dc042 JC |
440 | s->open_flags = open_flags; |
441 | raw_parse_flags(bdrv_flags, &s->open_flags); | |
83f64091 | 442 | |
90babde0 | 443 | s->fd = -1; |
40ff6d7e | 444 | fd = qemu_open(filename, s->open_flags, 0644); |
19cb3738 FB |
445 | if (fd < 0) { |
446 | ret = -errno; | |
09237757 | 447 | error_setg_errno(errp, errno, "Could not open '%s'", filename); |
c66a6157 | 448 | if (ret == -EROFS) { |
19cb3738 | 449 | ret = -EACCES; |
c66a6157 KW |
450 | } |
451 | goto fail; | |
19cb3738 | 452 | } |
83f64091 | 453 | s->fd = fd; |
9ef91a67 | 454 | |
5c6c3a6c | 455 | #ifdef CONFIG_LINUX_AIO |
0a4279d9 KW |
456 | /* Currently Linux does AIO only for files opened with O_DIRECT */ |
457 | if (s->use_linux_aio && !(s->open_flags & O_DIRECT)) { | |
d657c0c2 KW |
458 | error_setg(errp, "aio=native was specified, but it requires " |
459 | "cache.direct=on, which was not specified."); | |
460 | ret = -EINVAL; | |
461 | goto fail; | |
96518254 | 462 | } |
1501ecc1 | 463 | #else |
0a4279d9 | 464 | if (s->use_linux_aio) { |
d657c0c2 KW |
465 | error_setg(errp, "aio=native was specified, but is not supported " |
466 | "in this build."); | |
467 | ret = -EINVAL; | |
468 | goto fail; | |
1501ecc1 SH |
469 | } |
470 | #endif /* !defined(CONFIG_LINUX_AIO) */ | |
9ef91a67 | 471 | |
7ce21016 | 472 | s->has_discard = true; |
97a2ae34 | 473 | s->has_write_zeroes = true; |
465fe887 | 474 | bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP; |
3cad8307 RPM |
475 | if ((bs->open_flags & BDRV_O_NOCACHE) != 0) { |
476 | s->needs_alignment = true; | |
477 | } | |
260a82e5 PB |
478 | |
479 | if (fstat(s->fd, &st) < 0) { | |
01212d4e | 480 | ret = -errno; |
260a82e5 PB |
481 | error_setg_errno(errp, errno, "Could not stat file"); |
482 | goto fail; | |
483 | } | |
484 | if (S_ISREG(st.st_mode)) { | |
485 | s->discard_zeroes = true; | |
d50d8222 | 486 | s->has_fallocate = true; |
260a82e5 | 487 | } |
d0b4503e PB |
488 | if (S_ISBLK(st.st_mode)) { |
489 | #ifdef BLKDISCARDZEROES | |
490 | unsigned int arg; | |
491 | if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) { | |
492 | s->discard_zeroes = true; | |
493 | } | |
494 | #endif | |
495 | #ifdef __linux__ | |
496 | /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do | |
497 | * not rely on the contents of discarded blocks unless using O_DIRECT. | |
97a2ae34 | 498 | * Same for BLKZEROOUT. |
d0b4503e PB |
499 | */ |
500 | if (!(bs->open_flags & BDRV_O_NOCACHE)) { | |
501 | s->discard_zeroes = false; | |
97a2ae34 | 502 | s->has_write_zeroes = false; |
d0b4503e PB |
503 | } |
504 | #endif | |
505 | } | |
3cad8307 RPM |
506 | #ifdef __FreeBSD__ |
507 | if (S_ISCHR(st.st_mode)) { | |
508 | /* | |
509 | * The file is a char device (disk), which on FreeBSD isn't behind | |
510 | * a pager, so force all requests to be aligned. This is needed | |
511 | * so QEMU makes sure all IO operations on the device are aligned | |
512 | * to sector size, or else FreeBSD will reject them with EINVAL. | |
513 | */ | |
514 | s->needs_alignment = true; | |
515 | } | |
516 | #endif | |
260a82e5 | 517 | |
dce512de CH |
518 | #ifdef CONFIG_XFS |
519 | if (platform_test_xfs_fd(s->fd)) { | |
7ce21016 | 520 | s->is_xfs = true; |
dce512de CH |
521 | } |
522 | #endif | |
523 | ||
c66a6157 KW |
524 | ret = 0; |
525 | fail: | |
8bfea15d KW |
526 | if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { |
527 | unlink(filename); | |
528 | } | |
c66a6157 KW |
529 | qemu_opts_del(opts); |
530 | return ret; | |
83f64091 FB |
531 | } |
532 | ||
015a1036 HR |
533 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
534 | Error **errp) | |
90babde0 CH |
535 | { |
536 | BDRVRawState *s = bs->opaque; | |
537 | ||
538 | s->type = FTYPE_FILE; | |
9be38598 | 539 | return raw_open_common(bs, options, flags, 0, errp); |
90babde0 CH |
540 | } |
541 | ||
eeb6b45d JC |
542 | static int raw_reopen_prepare(BDRVReopenState *state, |
543 | BlockReopenQueue *queue, Error **errp) | |
544 | { | |
545 | BDRVRawState *s; | |
4e6d13c9 | 546 | BDRVRawReopenState *rs; |
eeb6b45d | 547 | int ret = 0; |
df26a350 | 548 | Error *local_err = NULL; |
eeb6b45d JC |
549 | |
550 | assert(state != NULL); | |
551 | assert(state->bs != NULL); | |
552 | ||
553 | s = state->bs->opaque; | |
554 | ||
5839e53b | 555 | state->opaque = g_new0(BDRVRawReopenState, 1); |
4e6d13c9 | 556 | rs = state->opaque; |
eeb6b45d | 557 | |
f709623b | 558 | if (s->type == FTYPE_CD) { |
4e6d13c9 | 559 | rs->open_flags |= O_NONBLOCK; |
1bc6b705 JC |
560 | } |
561 | ||
4e6d13c9 | 562 | raw_parse_flags(state->flags, &rs->open_flags); |
eeb6b45d | 563 | |
4e6d13c9 | 564 | rs->fd = -1; |
eeb6b45d | 565 | |
fdf263f6 | 566 | int fcntl_flags = O_APPEND | O_NONBLOCK; |
eeb6b45d JC |
567 | #ifdef O_NOATIME |
568 | fcntl_flags |= O_NOATIME; | |
569 | #endif | |
570 | ||
fdf263f6 AF |
571 | #ifdef O_ASYNC |
572 | /* Not all operating systems have O_ASYNC, and those that don't | |
4e6d13c9 | 573 | * will not let us track the state into rs->open_flags (typically |
fdf263f6 AF |
574 | * you achieve the same effect with an ioctl, for example I_SETSIG |
575 | * on Solaris). But we do not use O_ASYNC, so that's fine. | |
576 | */ | |
577 | assert((s->open_flags & O_ASYNC) == 0); | |
578 | #endif | |
579 | ||
4e6d13c9 | 580 | if ((rs->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { |
eeb6b45d | 581 | /* dup the original fd */ |
4e6d13c9 FZ |
582 | rs->fd = qemu_dup(s->fd); |
583 | if (rs->fd >= 0) { | |
584 | ret = fcntl_setfl(rs->fd, rs->open_flags); | |
eeb6b45d | 585 | if (ret) { |
4e6d13c9 FZ |
586 | qemu_close(rs->fd); |
587 | rs->fd = -1; | |
eeb6b45d JC |
588 | } |
589 | } | |
590 | } | |
591 | ||
592 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ | |
4e6d13c9 | 593 | if (rs->fd == -1) { |
bdd03cdf HR |
594 | const char *normalized_filename = state->bs->filename; |
595 | ret = raw_normalize_devicepath(&normalized_filename); | |
596 | if (ret < 0) { | |
597 | error_setg_errno(errp, -ret, "Could not normalize device path"); | |
598 | } else { | |
4e6d13c9 FZ |
599 | assert(!(rs->open_flags & O_CREAT)); |
600 | rs->fd = qemu_open(normalized_filename, rs->open_flags); | |
601 | if (rs->fd == -1) { | |
bdd03cdf HR |
602 | error_setg_errno(errp, errno, "Could not reopen file"); |
603 | ret = -1; | |
604 | } | |
eeb6b45d JC |
605 | } |
606 | } | |
df26a350 KW |
607 | |
608 | /* Fail already reopen_prepare() if we can't get a working O_DIRECT | |
609 | * alignment with the new fd. */ | |
4e6d13c9 FZ |
610 | if (rs->fd != -1) { |
611 | raw_probe_alignment(state->bs, rs->fd, &local_err); | |
df26a350 | 612 | if (local_err) { |
4e6d13c9 FZ |
613 | qemu_close(rs->fd); |
614 | rs->fd = -1; | |
df26a350 KW |
615 | error_propagate(errp, local_err); |
616 | ret = -EINVAL; | |
617 | } | |
618 | } | |
619 | ||
eeb6b45d JC |
620 | return ret; |
621 | } | |
622 | ||
eeb6b45d JC |
623 | static void raw_reopen_commit(BDRVReopenState *state) |
624 | { | |
4e6d13c9 | 625 | BDRVRawReopenState *rs = state->opaque; |
eeb6b45d JC |
626 | BDRVRawState *s = state->bs->opaque; |
627 | ||
4e6d13c9 | 628 | s->open_flags = rs->open_flags; |
eeb6b45d JC |
629 | |
630 | qemu_close(s->fd); | |
4e6d13c9 | 631 | s->fd = rs->fd; |
eeb6b45d JC |
632 | |
633 | g_free(state->opaque); | |
634 | state->opaque = NULL; | |
635 | } | |
636 | ||
637 | ||
638 | static void raw_reopen_abort(BDRVReopenState *state) | |
639 | { | |
4e6d13c9 | 640 | BDRVRawReopenState *rs = state->opaque; |
eeb6b45d JC |
641 | |
642 | /* nothing to do if NULL, we didn't get far enough */ | |
4e6d13c9 | 643 | if (rs == NULL) { |
eeb6b45d JC |
644 | return; |
645 | } | |
646 | ||
4e6d13c9 FZ |
647 | if (rs->fd >= 0) { |
648 | qemu_close(rs->fd); | |
649 | rs->fd = -1; | |
eeb6b45d JC |
650 | } |
651 | g_free(state->opaque); | |
652 | state->opaque = NULL; | |
653 | } | |
654 | ||
48265250 | 655 | static int hdev_get_max_transfer_length(BlockDriverState *bs, int fd) |
6f607174 FZ |
656 | { |
657 | #ifdef BLKSECTGET | |
48265250 EF |
658 | int max_bytes = 0; |
659 | short max_sectors = 0; | |
660 | if (bs->sg && ioctl(fd, BLKSECTGET, &max_bytes) == 0) { | |
661 | return max_bytes; | |
662 | } else if (!bs->sg && ioctl(fd, BLKSECTGET, &max_sectors) == 0) { | |
663 | return max_sectors << BDRV_SECTOR_BITS; | |
6f607174 FZ |
664 | } else { |
665 | return -errno; | |
666 | } | |
667 | #else | |
668 | return -ENOSYS; | |
669 | #endif | |
670 | } | |
671 | ||
9103f1ce FZ |
672 | static int hdev_get_max_segments(const struct stat *st) |
673 | { | |
674 | #ifdef CONFIG_LINUX | |
675 | char buf[32]; | |
676 | const char *end; | |
677 | char *sysfspath; | |
678 | int ret; | |
679 | int fd = -1; | |
680 | long max_segments; | |
681 | ||
682 | sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/max_segments", | |
683 | major(st->st_rdev), minor(st->st_rdev)); | |
684 | fd = open(sysfspath, O_RDONLY); | |
685 | if (fd == -1) { | |
686 | ret = -errno; | |
687 | goto out; | |
688 | } | |
689 | do { | |
69583490 | 690 | ret = read(fd, buf, sizeof(buf) - 1); |
9103f1ce FZ |
691 | } while (ret == -1 && errno == EINTR); |
692 | if (ret < 0) { | |
693 | ret = -errno; | |
694 | goto out; | |
695 | } else if (ret == 0) { | |
696 | ret = -EIO; | |
697 | goto out; | |
698 | } | |
699 | buf[ret] = 0; | |
700 | /* The file is ended with '\n', pass 'end' to accept that. */ | |
701 | ret = qemu_strtol(buf, &end, 10, &max_segments); | |
702 | if (ret == 0 && end && *end == '\n') { | |
703 | ret = max_segments; | |
704 | } | |
705 | ||
706 | out: | |
fed414df FZ |
707 | if (fd != -1) { |
708 | close(fd); | |
709 | } | |
9103f1ce FZ |
710 | g_free(sysfspath); |
711 | return ret; | |
712 | #else | |
713 | return -ENOTSUP; | |
714 | #endif | |
715 | } | |
716 | ||
3baca891 | 717 | static void raw_refresh_limits(BlockDriverState *bs, Error **errp) |
c25f53b0 PB |
718 | { |
719 | BDRVRawState *s = bs->opaque; | |
6f607174 FZ |
720 | struct stat st; |
721 | ||
722 | if (!fstat(s->fd, &st)) { | |
c4c41a0a | 723 | if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode)) { |
48265250 EF |
724 | int ret = hdev_get_max_transfer_length(bs, s->fd); |
725 | if (ret > 0 && ret <= BDRV_REQUEST_MAX_BYTES) { | |
726 | bs->bl.max_transfer = pow2floor(ret); | |
6f607174 | 727 | } |
9103f1ce FZ |
728 | ret = hdev_get_max_segments(&st); |
729 | if (ret > 0) { | |
730 | bs->bl.max_transfer = MIN(bs->bl.max_transfer, | |
731 | ret * getpagesize()); | |
732 | } | |
6f607174 FZ |
733 | } |
734 | } | |
eeb6b45d | 735 | |
df26a350 | 736 | raw_probe_alignment(bs, s->fd, errp); |
4196d2f0 | 737 | bs->bl.min_mem_alignment = s->buf_align; |
459b4e66 | 738 | bs->bl.opt_mem_alignment = MAX(s->buf_align, getpagesize()); |
c25f53b0 | 739 | } |
83f64091 | 740 | |
1a9335e4 ET |
741 | static int check_for_dasd(int fd) |
742 | { | |
743 | #ifdef BIODASDINFO2 | |
744 | struct dasd_information2_t info = {0}; | |
745 | ||
746 | return ioctl(fd, BIODASDINFO2, &info); | |
747 | #else | |
748 | return -1; | |
749 | #endif | |
750 | } | |
751 | ||
752 | /** | |
753 | * Try to get @bs's logical and physical block size. | |
754 | * On success, store them in @bsz and return zero. | |
755 | * On failure, return negative errno. | |
756 | */ | |
757 | static int hdev_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz) | |
758 | { | |
759 | BDRVRawState *s = bs->opaque; | |
760 | int ret; | |
761 | ||
762 | /* If DASD, get blocksizes */ | |
763 | if (check_for_dasd(s->fd) < 0) { | |
764 | return -ENOTSUP; | |
765 | } | |
766 | ret = probe_logical_blocksize(s->fd, &bsz->log); | |
767 | if (ret < 0) { | |
768 | return ret; | |
769 | } | |
770 | return probe_physical_blocksize(s->fd, &bsz->phys); | |
771 | } | |
772 | ||
773 | /** | |
774 | * Try to get @bs's geometry: cyls, heads, sectors. | |
775 | * On success, store them in @geo and return 0. | |
776 | * On failure return -errno. | |
777 | * (Allows block driver to assign default geometry values that guest sees) | |
778 | */ | |
779 | #ifdef __linux__ | |
780 | static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo) | |
781 | { | |
782 | BDRVRawState *s = bs->opaque; | |
783 | struct hd_geometry ioctl_geo = {0}; | |
1a9335e4 ET |
784 | |
785 | /* If DASD, get its geometry */ | |
786 | if (check_for_dasd(s->fd) < 0) { | |
787 | return -ENOTSUP; | |
788 | } | |
789 | if (ioctl(s->fd, HDIO_GETGEO, &ioctl_geo) < 0) { | |
790 | return -errno; | |
791 | } | |
792 | /* HDIO_GETGEO may return success even though geo contains zeros | |
793 | (e.g. certain multipath setups) */ | |
794 | if (!ioctl_geo.heads || !ioctl_geo.sectors || !ioctl_geo.cylinders) { | |
795 | return -ENOTSUP; | |
796 | } | |
797 | /* Do not return a geometry for partition */ | |
798 | if (ioctl_geo.start != 0) { | |
799 | return -ENOTSUP; | |
800 | } | |
801 | geo->heads = ioctl_geo.heads; | |
802 | geo->sectors = ioctl_geo.sectors; | |
1a9335e4 ET |
803 | geo->cylinders = ioctl_geo.cylinders; |
804 | ||
805 | return 0; | |
806 | } | |
807 | #else /* __linux__ */ | |
808 | static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo) | |
809 | { | |
810 | return -ENOTSUP; | |
811 | } | |
812 | #endif | |
813 | ||
de81a169 PB |
814 | static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb) |
815 | { | |
816 | int ret; | |
817 | ||
818 | ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); | |
819 | if (ret == -1) { | |
820 | return -errno; | |
821 | } | |
822 | ||
b608c8dc | 823 | return 0; |
de81a169 PB |
824 | } |
825 | ||
826 | static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb) | |
827 | { | |
e5bcf967 | 828 | BDRVRawState *s = aiocb->bs->opaque; |
de81a169 PB |
829 | int ret; |
830 | ||
e5bcf967 KW |
831 | if (s->page_cache_inconsistent) { |
832 | return -EIO; | |
833 | } | |
834 | ||
de81a169 PB |
835 | ret = qemu_fdatasync(aiocb->aio_fildes); |
836 | if (ret == -1) { | |
e5bcf967 KW |
837 | /* There is no clear definition of the semantics of a failing fsync(), |
838 | * so we may have to assume the worst. The sad truth is that this | |
839 | * assumption is correct for Linux. Some pages are now probably marked | |
840 | * clean in the page cache even though they are inconsistent with the | |
841 | * on-disk contents. The next fdatasync() call would succeed, but no | |
842 | * further writeback attempt will be made. We can't get back to a state | |
843 | * in which we know what is on disk (we would have to rewrite | |
844 | * everything that was touched since the last fdatasync() at least), so | |
845 | * make bdrv_flush() fail permanently. Given that the behaviour isn't | |
846 | * really defined, I have little hope that other OSes are doing better. | |
847 | * | |
848 | * Obviously, this doesn't affect O_DIRECT, which bypasses the page | |
849 | * cache. */ | |
850 | if ((s->open_flags & O_DIRECT) == 0) { | |
851 | s->page_cache_inconsistent = true; | |
852 | } | |
de81a169 PB |
853 | return -errno; |
854 | } | |
855 | return 0; | |
856 | } | |
857 | ||
858 | #ifdef CONFIG_PREADV | |
859 | ||
860 | static bool preadv_present = true; | |
861 | ||
862 | static ssize_t | |
863 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
864 | { | |
865 | return preadv(fd, iov, nr_iov, offset); | |
866 | } | |
867 | ||
868 | static ssize_t | |
869 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
870 | { | |
871 | return pwritev(fd, iov, nr_iov, offset); | |
872 | } | |
873 | ||
874 | #else | |
875 | ||
876 | static bool preadv_present = false; | |
877 | ||
878 | static ssize_t | |
879 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
880 | { | |
881 | return -ENOSYS; | |
882 | } | |
883 | ||
884 | static ssize_t | |
885 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
886 | { | |
887 | return -ENOSYS; | |
888 | } | |
889 | ||
890 | #endif | |
891 | ||
892 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) | |
893 | { | |
894 | ssize_t len; | |
895 | ||
896 | do { | |
897 | if (aiocb->aio_type & QEMU_AIO_WRITE) | |
898 | len = qemu_pwritev(aiocb->aio_fildes, | |
899 | aiocb->aio_iov, | |
900 | aiocb->aio_niov, | |
901 | aiocb->aio_offset); | |
902 | else | |
903 | len = qemu_preadv(aiocb->aio_fildes, | |
904 | aiocb->aio_iov, | |
905 | aiocb->aio_niov, | |
906 | aiocb->aio_offset); | |
907 | } while (len == -1 && errno == EINTR); | |
908 | ||
909 | if (len == -1) { | |
910 | return -errno; | |
911 | } | |
912 | return len; | |
913 | } | |
914 | ||
915 | /* | |
916 | * Read/writes the data to/from a given linear buffer. | |
917 | * | |
918 | * Returns the number of bytes handles or -errno in case of an error. Short | |
919 | * reads are only returned if the end of the file is reached. | |
920 | */ | |
921 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) | |
922 | { | |
923 | ssize_t offset = 0; | |
924 | ssize_t len; | |
925 | ||
926 | while (offset < aiocb->aio_nbytes) { | |
927 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
928 | len = pwrite(aiocb->aio_fildes, | |
929 | (const char *)buf + offset, | |
930 | aiocb->aio_nbytes - offset, | |
931 | aiocb->aio_offset + offset); | |
932 | } else { | |
933 | len = pread(aiocb->aio_fildes, | |
934 | buf + offset, | |
935 | aiocb->aio_nbytes - offset, | |
936 | aiocb->aio_offset + offset); | |
937 | } | |
938 | if (len == -1 && errno == EINTR) { | |
939 | continue; | |
61ed73cf SH |
940 | } else if (len == -1 && errno == EINVAL && |
941 | (aiocb->bs->open_flags & BDRV_O_NOCACHE) && | |
942 | !(aiocb->aio_type & QEMU_AIO_WRITE) && | |
943 | offset > 0) { | |
944 | /* O_DIRECT pread() may fail with EINVAL when offset is unaligned | |
945 | * after a short read. Assume that O_DIRECT short reads only occur | |
946 | * at EOF. Therefore this is a short read, not an I/O error. | |
947 | */ | |
948 | break; | |
de81a169 PB |
949 | } else if (len == -1) { |
950 | offset = -errno; | |
951 | break; | |
952 | } else if (len == 0) { | |
953 | break; | |
954 | } | |
955 | offset += len; | |
956 | } | |
957 | ||
958 | return offset; | |
959 | } | |
960 | ||
961 | static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) | |
962 | { | |
963 | ssize_t nbytes; | |
964 | char *buf; | |
965 | ||
966 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { | |
967 | /* | |
968 | * If there is just a single buffer, and it is properly aligned | |
969 | * we can just use plain pread/pwrite without any problems. | |
970 | */ | |
971 | if (aiocb->aio_niov == 1) { | |
972 | return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base); | |
973 | } | |
974 | /* | |
975 | * We have more than one iovec, and all are properly aligned. | |
976 | * | |
977 | * Try preadv/pwritev first and fall back to linearizing the | |
978 | * buffer if it's not supported. | |
979 | */ | |
980 | if (preadv_present) { | |
981 | nbytes = handle_aiocb_rw_vector(aiocb); | |
982 | if (nbytes == aiocb->aio_nbytes || | |
983 | (nbytes < 0 && nbytes != -ENOSYS)) { | |
984 | return nbytes; | |
985 | } | |
986 | preadv_present = false; | |
987 | } | |
988 | ||
989 | /* | |
990 | * XXX(hch): short read/write. no easy way to handle the reminder | |
991 | * using these interfaces. For now retry using plain | |
992 | * pread/pwrite? | |
993 | */ | |
994 | } | |
995 | ||
996 | /* | |
997 | * Ok, we have to do it the hard way, copy all segments into | |
998 | * a single aligned buffer. | |
999 | */ | |
50d4a858 KW |
1000 | buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes); |
1001 | if (buf == NULL) { | |
1002 | return -ENOMEM; | |
1003 | } | |
1004 | ||
de81a169 PB |
1005 | if (aiocb->aio_type & QEMU_AIO_WRITE) { |
1006 | char *p = buf; | |
1007 | int i; | |
1008 | ||
1009 | for (i = 0; i < aiocb->aio_niov; ++i) { | |
1010 | memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len); | |
1011 | p += aiocb->aio_iov[i].iov_len; | |
1012 | } | |
8eb029c2 | 1013 | assert(p - buf == aiocb->aio_nbytes); |
de81a169 PB |
1014 | } |
1015 | ||
1016 | nbytes = handle_aiocb_rw_linear(aiocb, buf); | |
1017 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { | |
1018 | char *p = buf; | |
1019 | size_t count = aiocb->aio_nbytes, copy; | |
1020 | int i; | |
1021 | ||
1022 | for (i = 0; i < aiocb->aio_niov && count; ++i) { | |
1023 | copy = count; | |
1024 | if (copy > aiocb->aio_iov[i].iov_len) { | |
1025 | copy = aiocb->aio_iov[i].iov_len; | |
1026 | } | |
1027 | memcpy(aiocb->aio_iov[i].iov_base, p, copy); | |
8eb029c2 | 1028 | assert(count >= copy); |
de81a169 PB |
1029 | p += copy; |
1030 | count -= copy; | |
1031 | } | |
8eb029c2 | 1032 | assert(count == 0); |
de81a169 PB |
1033 | } |
1034 | qemu_vfree(buf); | |
1035 | ||
1036 | return nbytes; | |
1037 | } | |
1038 | ||
8238010b | 1039 | #ifdef CONFIG_XFS |
97a2ae34 PB |
1040 | static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes) |
1041 | { | |
1042 | struct xfs_flock64 fl; | |
bcb22555 | 1043 | int err; |
97a2ae34 PB |
1044 | |
1045 | memset(&fl, 0, sizeof(fl)); | |
1046 | fl.l_whence = SEEK_SET; | |
1047 | fl.l_start = offset; | |
1048 | fl.l_len = bytes; | |
1049 | ||
1050 | if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) { | |
bcb22555 DA |
1051 | err = errno; |
1052 | DPRINTF("cannot write zero range (%s)\n", strerror(errno)); | |
1053 | return -err; | |
97a2ae34 PB |
1054 | } |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
8238010b PB |
1059 | static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes) |
1060 | { | |
1061 | struct xfs_flock64 fl; | |
bcb22555 | 1062 | int err; |
8238010b PB |
1063 | |
1064 | memset(&fl, 0, sizeof(fl)); | |
1065 | fl.l_whence = SEEK_SET; | |
1066 | fl.l_start = offset; | |
1067 | fl.l_len = bytes; | |
1068 | ||
1069 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
bcb22555 DA |
1070 | err = errno; |
1071 | DPRINTF("cannot punch hole (%s)\n", strerror(errno)); | |
1072 | return -err; | |
8238010b PB |
1073 | } |
1074 | ||
1075 | return 0; | |
1076 | } | |
1077 | #endif | |
1078 | ||
1486df0e DL |
1079 | static int translate_err(int err) |
1080 | { | |
1081 | if (err == -ENODEV || err == -ENOSYS || err == -EOPNOTSUPP || | |
1082 | err == -ENOTTY) { | |
1083 | err = -ENOTSUP; | |
1084 | } | |
1085 | return err; | |
1086 | } | |
1087 | ||
d50d8222 | 1088 | #ifdef CONFIG_FALLOCATE |
0b991712 DL |
1089 | static int do_fallocate(int fd, int mode, off_t offset, off_t len) |
1090 | { | |
1091 | do { | |
1092 | if (fallocate(fd, mode, offset, len) == 0) { | |
1093 | return 0; | |
1094 | } | |
1095 | } while (errno == EINTR); | |
1096 | return translate_err(-errno); | |
1097 | } | |
1098 | #endif | |
1099 | ||
37cc9f7f | 1100 | static ssize_t handle_aiocb_write_zeroes_block(RawPosixAIOData *aiocb) |
97a2ae34 | 1101 | { |
37cc9f7f | 1102 | int ret = -ENOTSUP; |
97a2ae34 PB |
1103 | BDRVRawState *s = aiocb->bs->opaque; |
1104 | ||
37cc9f7f | 1105 | if (!s->has_write_zeroes) { |
97a2ae34 PB |
1106 | return -ENOTSUP; |
1107 | } | |
1108 | ||
97a2ae34 | 1109 | #ifdef BLKZEROOUT |
37cc9f7f DL |
1110 | do { |
1111 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
1112 | if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) { | |
1113 | return 0; | |
97a2ae34 | 1114 | } |
37cc9f7f DL |
1115 | } while (errno == EINTR); |
1116 | ||
1117 | ret = translate_err(-errno); | |
97a2ae34 | 1118 | #endif |
97a2ae34 | 1119 | |
1486df0e | 1120 | if (ret == -ENOTSUP) { |
97a2ae34 | 1121 | s->has_write_zeroes = false; |
97a2ae34 PB |
1122 | } |
1123 | return ret; | |
1124 | } | |
1125 | ||
37cc9f7f DL |
1126 | static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) |
1127 | { | |
a6dcf097 | 1128 | #if defined(CONFIG_FALLOCATE) || defined(CONFIG_XFS) |
37cc9f7f | 1129 | BDRVRawState *s = aiocb->bs->opaque; |
a6dcf097 | 1130 | #endif |
37cc9f7f DL |
1131 | |
1132 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
1133 | return handle_aiocb_write_zeroes_block(aiocb); | |
1134 | } | |
1135 | ||
1136 | #ifdef CONFIG_XFS | |
1137 | if (s->is_xfs) { | |
1138 | return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
1139 | } | |
1140 | #endif | |
1141 | ||
b953f075 DL |
1142 | #ifdef CONFIG_FALLOCATE_ZERO_RANGE |
1143 | if (s->has_write_zeroes) { | |
1144 | int ret = do_fallocate(s->fd, FALLOC_FL_ZERO_RANGE, | |
1145 | aiocb->aio_offset, aiocb->aio_nbytes); | |
1146 | if (ret == 0 || ret != -ENOTSUP) { | |
1147 | return ret; | |
1148 | } | |
1149 | s->has_write_zeroes = false; | |
1150 | } | |
1151 | #endif | |
1152 | ||
1cdc3239 DL |
1153 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
1154 | if (s->has_discard && s->has_fallocate) { | |
1155 | int ret = do_fallocate(s->fd, | |
1156 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, | |
1157 | aiocb->aio_offset, aiocb->aio_nbytes); | |
1158 | if (ret == 0) { | |
1159 | ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes); | |
1160 | if (ret == 0 || ret != -ENOTSUP) { | |
1161 | return ret; | |
1162 | } | |
1163 | s->has_fallocate = false; | |
1164 | } else if (ret != -ENOTSUP) { | |
1165 | return ret; | |
1166 | } else { | |
1167 | s->has_discard = false; | |
1168 | } | |
1169 | } | |
1170 | #endif | |
1171 | ||
d50d8222 DL |
1172 | #ifdef CONFIG_FALLOCATE |
1173 | if (s->has_fallocate && aiocb->aio_offset >= bdrv_getlength(aiocb->bs)) { | |
1174 | int ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes); | |
1175 | if (ret == 0 || ret != -ENOTSUP) { | |
1176 | return ret; | |
1177 | } | |
1178 | s->has_fallocate = false; | |
1179 | } | |
1180 | #endif | |
1181 | ||
37cc9f7f DL |
1182 | return -ENOTSUP; |
1183 | } | |
1184 | ||
8238010b PB |
1185 | static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb) |
1186 | { | |
1187 | int ret = -EOPNOTSUPP; | |
1188 | BDRVRawState *s = aiocb->bs->opaque; | |
1189 | ||
7ce21016 PB |
1190 | if (!s->has_discard) { |
1191 | return -ENOTSUP; | |
8238010b PB |
1192 | } |
1193 | ||
1194 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
1195 | #ifdef BLKDISCARD | |
1196 | do { | |
1197 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
1198 | if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) { | |
1199 | return 0; | |
1200 | } | |
1201 | } while (errno == EINTR); | |
1202 | ||
1203 | ret = -errno; | |
1204 | #endif | |
1205 | } else { | |
1206 | #ifdef CONFIG_XFS | |
1207 | if (s->is_xfs) { | |
1208 | return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
1209 | } | |
1210 | #endif | |
1211 | ||
1212 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE | |
0b991712 DL |
1213 | ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
1214 | aiocb->aio_offset, aiocb->aio_nbytes); | |
8238010b PB |
1215 | #endif |
1216 | } | |
1217 | ||
1486df0e DL |
1218 | ret = translate_err(ret); |
1219 | if (ret == -ENOTSUP) { | |
7ce21016 | 1220 | s->has_discard = false; |
8238010b PB |
1221 | } |
1222 | return ret; | |
1223 | } | |
1224 | ||
de81a169 PB |
1225 | static int aio_worker(void *arg) |
1226 | { | |
1227 | RawPosixAIOData *aiocb = arg; | |
1228 | ssize_t ret = 0; | |
1229 | ||
1230 | switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) { | |
1231 | case QEMU_AIO_READ: | |
1232 | ret = handle_aiocb_rw(aiocb); | |
c0191e76 | 1233 | if (ret >= 0 && ret < aiocb->aio_nbytes) { |
de81a169 PB |
1234 | iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret, |
1235 | 0, aiocb->aio_nbytes - ret); | |
1236 | ||
1237 | ret = aiocb->aio_nbytes; | |
1238 | } | |
1239 | if (ret == aiocb->aio_nbytes) { | |
1240 | ret = 0; | |
1241 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
1242 | ret = -EINVAL; | |
1243 | } | |
1244 | break; | |
1245 | case QEMU_AIO_WRITE: | |
1246 | ret = handle_aiocb_rw(aiocb); | |
1247 | if (ret == aiocb->aio_nbytes) { | |
1248 | ret = 0; | |
1249 | } else if (ret >= 0 && ret < aiocb->aio_nbytes) { | |
1250 | ret = -EINVAL; | |
1251 | } | |
1252 | break; | |
1253 | case QEMU_AIO_FLUSH: | |
1254 | ret = handle_aiocb_flush(aiocb); | |
1255 | break; | |
1256 | case QEMU_AIO_IOCTL: | |
1257 | ret = handle_aiocb_ioctl(aiocb); | |
1258 | break; | |
8238010b PB |
1259 | case QEMU_AIO_DISCARD: |
1260 | ret = handle_aiocb_discard(aiocb); | |
1261 | break; | |
97a2ae34 PB |
1262 | case QEMU_AIO_WRITE_ZEROES: |
1263 | ret = handle_aiocb_write_zeroes(aiocb); | |
1264 | break; | |
de81a169 PB |
1265 | default: |
1266 | fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); | |
1267 | ret = -EINVAL; | |
1268 | break; | |
1269 | } | |
1270 | ||
c84b3192 | 1271 | g_free(aiocb); |
de81a169 PB |
1272 | return ret; |
1273 | } | |
1274 | ||
260a82e5 | 1275 | static int paio_submit_co(BlockDriverState *bs, int fd, |
2ffa76c2 EB |
1276 | int64_t offset, QEMUIOVector *qiov, |
1277 | int count, int type) | |
260a82e5 | 1278 | { |
c84b3192 | 1279 | RawPosixAIOData *acb = g_new(RawPosixAIOData, 1); |
260a82e5 PB |
1280 | ThreadPool *pool; |
1281 | ||
1282 | acb->bs = bs; | |
1283 | acb->aio_type = type; | |
1284 | acb->aio_fildes = fd; | |
1285 | ||
2ffa76c2 EB |
1286 | acb->aio_nbytes = count; |
1287 | acb->aio_offset = offset; | |
8eb029c2 | 1288 | |
260a82e5 PB |
1289 | if (qiov) { |
1290 | acb->aio_iov = qiov->iov; | |
1291 | acb->aio_niov = qiov->niov; | |
2ffa76c2 | 1292 | assert(qiov->size == count); |
260a82e5 | 1293 | } |
260a82e5 | 1294 | |
2ffa76c2 | 1295 | trace_paio_submit_co(offset, count, type); |
260a82e5 PB |
1296 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1297 | return thread_pool_submit_co(pool, aio_worker, acb); | |
1298 | } | |
1299 | ||
7c84b1b8 | 1300 | static BlockAIOCB *paio_submit(BlockDriverState *bs, int fd, |
36e3b2e7 | 1301 | int64_t offset, QEMUIOVector *qiov, int count, |
097310b5 | 1302 | BlockCompletionFunc *cb, void *opaque, int type) |
de81a169 | 1303 | { |
c84b3192 | 1304 | RawPosixAIOData *acb = g_new(RawPosixAIOData, 1); |
c4d9d196 | 1305 | ThreadPool *pool; |
de81a169 PB |
1306 | |
1307 | acb->bs = bs; | |
1308 | acb->aio_type = type; | |
1309 | acb->aio_fildes = fd; | |
1310 | ||
36e3b2e7 EB |
1311 | acb->aio_nbytes = count; |
1312 | acb->aio_offset = offset; | |
8eb029c2 | 1313 | |
de81a169 PB |
1314 | if (qiov) { |
1315 | acb->aio_iov = qiov->iov; | |
1316 | acb->aio_niov = qiov->niov; | |
8eb029c2 | 1317 | assert(qiov->size == acb->aio_nbytes); |
de81a169 | 1318 | } |
de81a169 | 1319 | |
36e3b2e7 | 1320 | trace_paio_submit(acb, opaque, offset, count, type); |
c4d9d196 SH |
1321 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
1322 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
de81a169 PB |
1323 | } |
1324 | ||
9d52aa3c KW |
1325 | static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset, |
1326 | uint64_t bytes, QEMUIOVector *qiov, int type) | |
83f64091 | 1327 | { |
ce1a14dc | 1328 | BDRVRawState *s = bs->opaque; |
ce1a14dc | 1329 | |
19cb3738 | 1330 | if (fd_open(bs) < 0) |
2174f12b | 1331 | return -EIO; |
19cb3738 | 1332 | |
f141eafe | 1333 | /* |
3cad8307 RPM |
1334 | * Check if the underlying device requires requests to be aligned, |
1335 | * and if the request we are trying to submit is aligned or not. | |
1336 | * If this is the case tell the low-level driver that it needs | |
1337 | * to copy the buffer. | |
f141eafe | 1338 | */ |
3cad8307 | 1339 | if (s->needs_alignment) { |
c53b1c51 | 1340 | if (!bdrv_qiov_is_aligned(bs, qiov)) { |
5c6c3a6c | 1341 | type |= QEMU_AIO_MISALIGNED; |
e44bd6fc | 1342 | #ifdef CONFIG_LINUX_AIO |
0a4279d9 | 1343 | } else if (s->use_linux_aio) { |
0187f5c9 | 1344 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
9d52aa3c | 1345 | assert(qiov->size == bytes); |
0187f5c9 | 1346 | return laio_co_submit(bs, aio, s->fd, offset, qiov, type); |
e44bd6fc | 1347 | #endif |
5c6c3a6c | 1348 | } |
9ef91a67 | 1349 | } |
f141eafe | 1350 | |
9d52aa3c | 1351 | return paio_submit_co(bs, s->fd, offset, qiov, bytes, type); |
2174f12b KW |
1352 | } |
1353 | ||
9d52aa3c KW |
1354 | static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset, |
1355 | uint64_t bytes, QEMUIOVector *qiov, | |
1356 | int flags) | |
2174f12b | 1357 | { |
9d52aa3c | 1358 | return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_READ); |
2174f12b KW |
1359 | } |
1360 | ||
9d52aa3c KW |
1361 | static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset, |
1362 | uint64_t bytes, QEMUIOVector *qiov, | |
1363 | int flags) | |
2174f12b | 1364 | { |
9d52aa3c KW |
1365 | assert(flags == 0); |
1366 | return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_WRITE); | |
83f64091 FB |
1367 | } |
1368 | ||
1b3abdcc ML |
1369 | static void raw_aio_plug(BlockDriverState *bs) |
1370 | { | |
1371 | #ifdef CONFIG_LINUX_AIO | |
0a4279d9 KW |
1372 | BDRVRawState *s = bs->opaque; |
1373 | if (s->use_linux_aio) { | |
0187f5c9 PB |
1374 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
1375 | laio_io_plug(bs, aio); | |
1b3abdcc ML |
1376 | } |
1377 | #endif | |
1378 | } | |
1379 | ||
1380 | static void raw_aio_unplug(BlockDriverState *bs) | |
1381 | { | |
1382 | #ifdef CONFIG_LINUX_AIO | |
0a4279d9 KW |
1383 | BDRVRawState *s = bs->opaque; |
1384 | if (s->use_linux_aio) { | |
0187f5c9 PB |
1385 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
1386 | laio_io_unplug(bs, aio); | |
1b3abdcc ML |
1387 | } |
1388 | #endif | |
1389 | } | |
1390 | ||
7c84b1b8 | 1391 | static BlockAIOCB *raw_aio_flush(BlockDriverState *bs, |
097310b5 | 1392 | BlockCompletionFunc *cb, void *opaque) |
b2e12bc6 CH |
1393 | { |
1394 | BDRVRawState *s = bs->opaque; | |
1395 | ||
1396 | if (fd_open(bs) < 0) | |
1397 | return NULL; | |
1398 | ||
1e5b9d2f | 1399 | return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
b2e12bc6 CH |
1400 | } |
1401 | ||
83f64091 FB |
1402 | static void raw_close(BlockDriverState *bs) |
1403 | { | |
1404 | BDRVRawState *s = bs->opaque; | |
c2f3426c | 1405 | |
19cb3738 | 1406 | if (s->fd >= 0) { |
2e1e79da | 1407 | qemu_close(s->fd); |
19cb3738 FB |
1408 | s->fd = -1; |
1409 | } | |
83f64091 FB |
1410 | } |
1411 | ||
1412 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
1413 | { | |
1414 | BDRVRawState *s = bs->opaque; | |
55b949c8 CH |
1415 | struct stat st; |
1416 | ||
1417 | if (fstat(s->fd, &st)) { | |
83f64091 | 1418 | return -errno; |
55b949c8 CH |
1419 | } |
1420 | ||
1421 | if (S_ISREG(st.st_mode)) { | |
1422 | if (ftruncate(s->fd, offset) < 0) { | |
1423 | return -errno; | |
1424 | } | |
1425 | } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
1426 | if (offset > raw_getlength(bs)) { | |
1427 | return -EINVAL; | |
1428 | } | |
1429 | } else { | |
1430 | return -ENOTSUP; | |
1431 | } | |
1432 | ||
83f64091 FB |
1433 | return 0; |
1434 | } | |
1435 | ||
128ab2ff BS |
1436 | #ifdef __OpenBSD__ |
1437 | static int64_t raw_getlength(BlockDriverState *bs) | |
1438 | { | |
1439 | BDRVRawState *s = bs->opaque; | |
1440 | int fd = s->fd; | |
1441 | struct stat st; | |
1442 | ||
1443 | if (fstat(fd, &st)) | |
aa729704 | 1444 | return -errno; |
128ab2ff BS |
1445 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
1446 | struct disklabel dl; | |
1447 | ||
1448 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
aa729704 | 1449 | return -errno; |
128ab2ff BS |
1450 | return (uint64_t)dl.d_secsize * |
1451 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1452 | } else | |
1453 | return st.st_size; | |
1454 | } | |
d1f6fd8d CE |
1455 | #elif defined(__NetBSD__) |
1456 | static int64_t raw_getlength(BlockDriverState *bs) | |
1457 | { | |
1458 | BDRVRawState *s = bs->opaque; | |
1459 | int fd = s->fd; | |
1460 | struct stat st; | |
1461 | ||
1462 | if (fstat(fd, &st)) | |
aa729704 | 1463 | return -errno; |
d1f6fd8d CE |
1464 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
1465 | struct dkwedge_info dkw; | |
1466 | ||
1467 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
1468 | return dkw.dkw_size * 512; | |
1469 | } else { | |
1470 | struct disklabel dl; | |
1471 | ||
1472 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
aa729704 | 1473 | return -errno; |
d1f6fd8d CE |
1474 | return (uint64_t)dl.d_secsize * |
1475 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
1476 | } | |
1477 | } else | |
1478 | return st.st_size; | |
1479 | } | |
50779cc2 CH |
1480 | #elif defined(__sun__) |
1481 | static int64_t raw_getlength(BlockDriverState *bs) | |
1482 | { | |
1483 | BDRVRawState *s = bs->opaque; | |
1484 | struct dk_minfo minfo; | |
1485 | int ret; | |
aa729704 | 1486 | int64_t size; |
50779cc2 CH |
1487 | |
1488 | ret = fd_open(bs); | |
1489 | if (ret < 0) { | |
1490 | return ret; | |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
1495 | */ | |
1496 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
1497 | if (ret != -1) { | |
1498 | return minfo.dki_lbsize * minfo.dki_capacity; | |
1499 | } | |
1500 | ||
1501 | /* | |
1502 | * There are reports that lseek on some devices fails, but | |
1503 | * irc discussion said that contingency on contingency was overkill. | |
1504 | */ | |
aa729704 MA |
1505 | size = lseek(s->fd, 0, SEEK_END); |
1506 | if (size < 0) { | |
1507 | return -errno; | |
1508 | } | |
1509 | return size; | |
50779cc2 CH |
1510 | } |
1511 | #elif defined(CONFIG_BSD) | |
1512 | static int64_t raw_getlength(BlockDriverState *bs) | |
83f64091 FB |
1513 | { |
1514 | BDRVRawState *s = bs->opaque; | |
1515 | int fd = s->fd; | |
1516 | int64_t size; | |
83f64091 | 1517 | struct stat sb; |
a167ba50 | 1518 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a | 1519 | int reopened = 0; |
83f64091 | 1520 | #endif |
19cb3738 FB |
1521 | int ret; |
1522 | ||
1523 | ret = fd_open(bs); | |
1524 | if (ret < 0) | |
1525 | return ret; | |
83f64091 | 1526 | |
a167ba50 | 1527 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1528 | again: |
1529 | #endif | |
83f64091 FB |
1530 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
1531 | #ifdef DIOCGMEDIASIZE | |
1532 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
c5e97233 BS |
1533 | #elif defined(DIOCGPART) |
1534 | { | |
1535 | struct partinfo pi; | |
1536 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
1537 | size = pi.media_size; | |
1538 | else | |
1539 | size = 0; | |
1540 | } | |
1541 | if (size == 0) | |
83f64091 | 1542 | #endif |
83affaa6 | 1543 | #if defined(__APPLE__) && defined(__MACH__) |
728dacbd JA |
1544 | { |
1545 | uint64_t sectors = 0; | |
1546 | uint32_t sector_size = 0; | |
1547 | ||
1548 | if (ioctl(fd, DKIOCGETBLOCKCOUNT, §ors) == 0 | |
1549 | && ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) == 0) { | |
1550 | size = sectors * sector_size; | |
1551 | } else { | |
1552 | size = lseek(fd, 0LL, SEEK_END); | |
1553 | if (size < 0) { | |
1554 | return -errno; | |
1555 | } | |
1556 | } | |
1557 | } | |
83f64091 FB |
1558 | #else |
1559 | size = lseek(fd, 0LL, SEEK_END); | |
aa729704 MA |
1560 | if (size < 0) { |
1561 | return -errno; | |
1562 | } | |
9f23011a | 1563 | #endif |
a167ba50 | 1564 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
1565 | switch(s->type) { |
1566 | case FTYPE_CD: | |
1567 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
1568 | if (size == 2048LL * (unsigned)-1) | |
1569 | size = 0; | |
1570 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 1571 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
1572 | reopened = 1; |
1573 | goto again; | |
1574 | } | |
1575 | } | |
83f64091 | 1576 | #endif |
50779cc2 | 1577 | } else { |
83f64091 | 1578 | size = lseek(fd, 0, SEEK_END); |
aa729704 MA |
1579 | if (size < 0) { |
1580 | return -errno; | |
1581 | } | |
83f64091 | 1582 | } |
83f64091 FB |
1583 | return size; |
1584 | } | |
50779cc2 CH |
1585 | #else |
1586 | static int64_t raw_getlength(BlockDriverState *bs) | |
1587 | { | |
1588 | BDRVRawState *s = bs->opaque; | |
1589 | int ret; | |
aa729704 | 1590 | int64_t size; |
50779cc2 CH |
1591 | |
1592 | ret = fd_open(bs); | |
1593 | if (ret < 0) { | |
1594 | return ret; | |
1595 | } | |
1596 | ||
aa729704 MA |
1597 | size = lseek(s->fd, 0, SEEK_END); |
1598 | if (size < 0) { | |
1599 | return -errno; | |
1600 | } | |
1601 | return size; | |
50779cc2 | 1602 | } |
128ab2ff | 1603 | #endif |
83f64091 | 1604 | |
4a1d5e1f FZ |
1605 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
1606 | { | |
1607 | struct stat st; | |
1608 | BDRVRawState *s = bs->opaque; | |
1609 | ||
1610 | if (fstat(s->fd, &st) < 0) { | |
1611 | return -errno; | |
1612 | } | |
1613 | return (int64_t)st.st_blocks * 512; | |
1614 | } | |
1615 | ||
6f482f74 | 1616 | static int raw_create(const char *filename, QemuOpts *opts, Error **errp) |
83f64091 FB |
1617 | { |
1618 | int fd; | |
1e37d059 | 1619 | int result = 0; |
0e7e1989 | 1620 | int64_t total_size = 0; |
4ab15590 | 1621 | bool nocow = false; |
06247428 HT |
1622 | PreallocMode prealloc; |
1623 | char *buf = NULL; | |
1624 | Error *local_err = NULL; | |
83f64091 | 1625 | |
464d9f64 HR |
1626 | strstart(filename, "file:", &filename); |
1627 | ||
0e7e1989 | 1628 | /* Read out options */ |
180e9526 HT |
1629 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
1630 | BDRV_SECTOR_SIZE); | |
4ab15590 | 1631 | nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false); |
06247428 HT |
1632 | buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC); |
1633 | prealloc = qapi_enum_parse(PreallocMode_lookup, buf, | |
7fb1cf16 | 1634 | PREALLOC_MODE__MAX, PREALLOC_MODE_OFF, |
06247428 HT |
1635 | &local_err); |
1636 | g_free(buf); | |
1637 | if (local_err) { | |
1638 | error_propagate(errp, local_err); | |
1639 | result = -EINVAL; | |
1640 | goto out; | |
1641 | } | |
83f64091 | 1642 | |
73ba05d9 | 1643 | fd = qemu_open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, |
6165f4d8 | 1644 | 0644); |
1e37d059 SW |
1645 | if (fd < 0) { |
1646 | result = -errno; | |
e428e439 | 1647 | error_setg_errno(errp, -result, "Could not create file"); |
06247428 HT |
1648 | goto out; |
1649 | } | |
1650 | ||
1651 | if (nocow) { | |
4ab15590 | 1652 | #ifdef __linux__ |
06247428 HT |
1653 | /* Set NOCOW flag to solve performance issue on fs like btrfs. |
1654 | * This is an optimisation. The FS_IOC_SETFLAGS ioctl return value | |
1655 | * will be ignored since any failure of this operation should not | |
1656 | * block the left work. | |
1657 | */ | |
1658 | int attr; | |
1659 | if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0) { | |
1660 | attr |= FS_NOCOW_FL; | |
1661 | ioctl(fd, FS_IOC_SETFLAGS, &attr); | |
4ab15590 | 1662 | } |
06247428 HT |
1663 | #endif |
1664 | } | |
1665 | ||
ed911435 KW |
1666 | switch (prealloc) { |
1667 | #ifdef CONFIG_POSIX_FALLOCATE | |
1668 | case PREALLOC_MODE_FALLOC: | |
c6ccc2c5 NS |
1669 | /* |
1670 | * Truncating before posix_fallocate() makes it about twice slower on | |
1671 | * file systems that do not support fallocate(), trying to check if a | |
1672 | * block is allocated before allocating it, so don't do that here. | |
1673 | */ | |
06247428 HT |
1674 | result = -posix_fallocate(fd, 0, total_size); |
1675 | if (result != 0) { | |
c6ccc2c5 | 1676 | /* posix_fallocate() doesn't set errno. */ |
06247428 HT |
1677 | error_setg_errno(errp, -result, |
1678 | "Could not preallocate data for the new file"); | |
1e37d059 | 1679 | } |
ed911435 KW |
1680 | break; |
1681 | #endif | |
1682 | case PREALLOC_MODE_FULL: | |
1683 | { | |
5a1dad9d NS |
1684 | /* |
1685 | * Knowing the final size from the beginning could allow the file | |
1686 | * system driver to do less allocations and possibly avoid | |
1687 | * fragmentation of the file. | |
1688 | */ | |
1689 | if (ftruncate(fd, total_size) != 0) { | |
1690 | result = -errno; | |
1691 | error_setg_errno(errp, -result, "Could not resize file"); | |
1692 | goto out_close; | |
1693 | } | |
1694 | ||
06247428 | 1695 | int64_t num = 0, left = total_size; |
ed911435 | 1696 | buf = g_malloc0(65536); |
06247428 HT |
1697 | |
1698 | while (left > 0) { | |
1699 | num = MIN(left, 65536); | |
1700 | result = write(fd, buf, num); | |
1701 | if (result < 0) { | |
1702 | result = -errno; | |
1703 | error_setg_errno(errp, -result, | |
1704 | "Could not write to the new file"); | |
1705 | break; | |
1706 | } | |
39411cf3 | 1707 | left -= result; |
1e37d059 | 1708 | } |
731de380 | 1709 | if (result >= 0) { |
098ffa66 HR |
1710 | result = fsync(fd); |
1711 | if (result < 0) { | |
1712 | result = -errno; | |
1713 | error_setg_errno(errp, -result, | |
1714 | "Could not flush new file to disk"); | |
1715 | } | |
731de380 | 1716 | } |
06247428 | 1717 | g_free(buf); |
ed911435 KW |
1718 | break; |
1719 | } | |
1720 | case PREALLOC_MODE_OFF: | |
f6a72404 NS |
1721 | if (ftruncate(fd, total_size) != 0) { |
1722 | result = -errno; | |
1723 | error_setg_errno(errp, -result, "Could not resize file"); | |
1724 | } | |
ed911435 KW |
1725 | break; |
1726 | default: | |
06247428 HT |
1727 | result = -EINVAL; |
1728 | error_setg(errp, "Unsupported preallocation mode: %s", | |
1729 | PreallocMode_lookup[prealloc]); | |
ed911435 | 1730 | break; |
1e37d059 | 1731 | } |
06247428 | 1732 | |
5a1dad9d | 1733 | out_close: |
06247428 HT |
1734 | if (qemu_close(fd) != 0 && result == 0) { |
1735 | result = -errno; | |
1736 | error_setg_errno(errp, -result, "Could not close the new file"); | |
1737 | } | |
1738 | out: | |
1e37d059 | 1739 | return result; |
83f64091 FB |
1740 | } |
1741 | ||
d1f06fe6 MA |
1742 | /* |
1743 | * Find allocation range in @bs around offset @start. | |
1744 | * May change underlying file descriptor's file offset. | |
1745 | * If @start is not in a hole, store @start in @data, and the | |
1746 | * beginning of the next hole in @hole, and return 0. | |
1747 | * If @start is in a non-trailing hole, store @start in @hole and the | |
1748 | * beginning of the next non-hole in @data, and return 0. | |
1749 | * If @start is in a trailing hole or beyond EOF, return -ENXIO. | |
1750 | * If we can't find out, return a negative errno other than -ENXIO. | |
1751 | */ | |
1752 | static int find_allocation(BlockDriverState *bs, off_t start, | |
1753 | off_t *data, off_t *hole) | |
4f11aa8a HR |
1754 | { |
1755 | #if defined SEEK_HOLE && defined SEEK_DATA | |
94282e71 | 1756 | BDRVRawState *s = bs->opaque; |
d1f06fe6 | 1757 | off_t offs; |
94282e71 | 1758 | |
d1f06fe6 MA |
1759 | /* |
1760 | * SEEK_DATA cases: | |
1761 | * D1. offs == start: start is in data | |
1762 | * D2. offs > start: start is in a hole, next data at offs | |
1763 | * D3. offs < 0, errno = ENXIO: either start is in a trailing hole | |
1764 | * or start is beyond EOF | |
1765 | * If the latter happens, the file has been truncated behind | |
1766 | * our back since we opened it. All bets are off then. | |
1767 | * Treating like a trailing hole is simplest. | |
1768 | * D4. offs < 0, errno != ENXIO: we learned nothing | |
1769 | */ | |
1770 | offs = lseek(s->fd, start, SEEK_DATA); | |
1771 | if (offs < 0) { | |
1772 | return -errno; /* D3 or D4 */ | |
1773 | } | |
1774 | assert(offs >= start); | |
1775 | ||
1776 | if (offs > start) { | |
1777 | /* D2: in hole, next data at offs */ | |
1778 | *hole = start; | |
1779 | *data = offs; | |
1780 | return 0; | |
5500316d PB |
1781 | } |
1782 | ||
d1f06fe6 MA |
1783 | /* D1: in data, end not yet known */ |
1784 | ||
1785 | /* | |
1786 | * SEEK_HOLE cases: | |
1787 | * H1. offs == start: start is in a hole | |
1788 | * If this happens here, a hole has been dug behind our back | |
1789 | * since the previous lseek(). | |
1790 | * H2. offs > start: either start is in data, next hole at offs, | |
1791 | * or start is in trailing hole, EOF at offs | |
1792 | * Linux treats trailing holes like any other hole: offs == | |
1793 | * start. Solaris seeks to EOF instead: offs > start (blech). | |
1794 | * If that happens here, a hole has been dug behind our back | |
1795 | * since the previous lseek(). | |
1796 | * H3. offs < 0, errno = ENXIO: start is beyond EOF | |
1797 | * If this happens, the file has been truncated behind our | |
1798 | * back since we opened it. Treat it like a trailing hole. | |
1799 | * H4. offs < 0, errno != ENXIO: we learned nothing | |
1800 | * Pretend we know nothing at all, i.e. "forget" about D1. | |
1801 | */ | |
1802 | offs = lseek(s->fd, start, SEEK_HOLE); | |
1803 | if (offs < 0) { | |
1804 | return -errno; /* D1 and (H3 or H4) */ | |
1805 | } | |
1806 | assert(offs >= start); | |
1807 | ||
1808 | if (offs > start) { | |
1809 | /* | |
1810 | * D1 and H2: either in data, next hole at offs, or it was in | |
1811 | * data but is now in a trailing hole. In the latter case, | |
1812 | * all bets are off. Treating it as if it there was data all | |
1813 | * the way to EOF is safe, so simply do that. | |
1814 | */ | |
4f11aa8a | 1815 | *data = start; |
d1f06fe6 MA |
1816 | *hole = offs; |
1817 | return 0; | |
5500316d | 1818 | } |
4f11aa8a | 1819 | |
d1f06fe6 MA |
1820 | /* D1 and H1 */ |
1821 | return -EBUSY; | |
5500316d | 1822 | #else |
4f11aa8a | 1823 | return -ENOTSUP; |
5500316d | 1824 | #endif |
4f11aa8a HR |
1825 | } |
1826 | ||
1827 | /* | |
be2ebc6d | 1828 | * Returns the allocation status of the specified sectors. |
4f11aa8a HR |
1829 | * |
1830 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
1831 | * and 'pnum' is set to 0. | |
1832 | * | |
1833 | * 'pnum' is set to the number of sectors (including and immediately following | |
1834 | * the specified sector) that are known to be in the same | |
1835 | * allocated/unallocated state. | |
1836 | * | |
1837 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
1838 | * beyond the end of the disk image it will be clamped. | |
1839 | */ | |
1840 | static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, | |
1841 | int64_t sector_num, | |
67a0fd2a FZ |
1842 | int nb_sectors, int *pnum, |
1843 | BlockDriverState **file) | |
4f11aa8a HR |
1844 | { |
1845 | off_t start, data = 0, hole = 0; | |
e6d7ec32 | 1846 | int64_t total_size; |
d7f62751 | 1847 | int ret; |
4f11aa8a HR |
1848 | |
1849 | ret = fd_open(bs); | |
1850 | if (ret < 0) { | |
1851 | return ret; | |
1852 | } | |
1853 | ||
1854 | start = sector_num * BDRV_SECTOR_SIZE; | |
e6d7ec32 HR |
1855 | total_size = bdrv_getlength(bs); |
1856 | if (total_size < 0) { | |
1857 | return total_size; | |
1858 | } else if (start >= total_size) { | |
1859 | *pnum = 0; | |
1860 | return 0; | |
1861 | } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) { | |
1862 | nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE); | |
1863 | } | |
4f11aa8a | 1864 | |
d1f06fe6 MA |
1865 | ret = find_allocation(bs, start, &data, &hole); |
1866 | if (ret == -ENXIO) { | |
1867 | /* Trailing hole */ | |
1868 | *pnum = nb_sectors; | |
1869 | ret = BDRV_BLOCK_ZERO; | |
1870 | } else if (ret < 0) { | |
1871 | /* No info available, so pretend there are no holes */ | |
1872 | *pnum = nb_sectors; | |
1873 | ret = BDRV_BLOCK_DATA; | |
1874 | } else if (data == start) { | |
f4a769ab KW |
1875 | /* On a data extent, compute sectors to the end of the extent, |
1876 | * possibly including a partial sector at EOF. */ | |
1877 | *pnum = MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_SIZE)); | |
d1f06fe6 | 1878 | ret = BDRV_BLOCK_DATA; |
5500316d PB |
1879 | } else { |
1880 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
d1f06fe6 | 1881 | assert(hole == start); |
5500316d | 1882 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); |
d1f06fe6 | 1883 | ret = BDRV_BLOCK_ZERO; |
5500316d | 1884 | } |
02650acb | 1885 | *file = bs; |
d1f06fe6 | 1886 | return ret | BDRV_BLOCK_OFFSET_VALID | start; |
5500316d PB |
1887 | } |
1888 | ||
4da444a0 EB |
1889 | static coroutine_fn BlockAIOCB *raw_aio_pdiscard(BlockDriverState *bs, |
1890 | int64_t offset, int count, | |
097310b5 | 1891 | BlockCompletionFunc *cb, void *opaque) |
dce512de | 1892 | { |
dce512de CH |
1893 | BDRVRawState *s = bs->opaque; |
1894 | ||
4da444a0 | 1895 | return paio_submit(bs, s->fd, offset, NULL, count, |
8238010b | 1896 | cb, opaque, QEMU_AIO_DISCARD); |
dce512de | 1897 | } |
0e7e1989 | 1898 | |
2ffa76c2 EB |
1899 | static int coroutine_fn raw_co_pwrite_zeroes( |
1900 | BlockDriverState *bs, int64_t offset, | |
1901 | int count, BdrvRequestFlags flags) | |
260a82e5 PB |
1902 | { |
1903 | BDRVRawState *s = bs->opaque; | |
1904 | ||
1905 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
2ffa76c2 | 1906 | return paio_submit_co(bs, s->fd, offset, NULL, count, |
97a2ae34 PB |
1907 | QEMU_AIO_WRITE_ZEROES); |
1908 | } else if (s->discard_zeroes) { | |
2ffa76c2 | 1909 | return paio_submit_co(bs, s->fd, offset, NULL, count, |
97a2ae34 | 1910 | QEMU_AIO_DISCARD); |
260a82e5 | 1911 | } |
97a2ae34 | 1912 | return -ENOTSUP; |
260a82e5 PB |
1913 | } |
1914 | ||
1915 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
1916 | { | |
1917 | BDRVRawState *s = bs->opaque; | |
1918 | ||
1919 | bdi->unallocated_blocks_are_zero = s->discard_zeroes; | |
1920 | bdi->can_write_zeroes_with_unmap = s->discard_zeroes; | |
1921 | return 0; | |
1922 | } | |
1923 | ||
6f482f74 CL |
1924 | static QemuOptsList raw_create_opts = { |
1925 | .name = "raw-create-opts", | |
1926 | .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), | |
1927 | .desc = { | |
1928 | { | |
1929 | .name = BLOCK_OPT_SIZE, | |
1930 | .type = QEMU_OPT_SIZE, | |
1931 | .help = "Virtual disk size" | |
1932 | }, | |
4ab15590 CL |
1933 | { |
1934 | .name = BLOCK_OPT_NOCOW, | |
1935 | .type = QEMU_OPT_BOOL, | |
1936 | .help = "Turn off copy-on-write (valid only on btrfs)" | |
1937 | }, | |
06247428 HT |
1938 | { |
1939 | .name = BLOCK_OPT_PREALLOC, | |
1940 | .type = QEMU_OPT_STRING, | |
1941 | .help = "Preallocation mode (allowed values: off, falloc, full)" | |
1942 | }, | |
6f482f74 CL |
1943 | { /* end of list */ } |
1944 | } | |
0e7e1989 KW |
1945 | }; |
1946 | ||
5f535a94 | 1947 | BlockDriver bdrv_file = { |
84a12e66 CH |
1948 | .format_name = "file", |
1949 | .protocol_name = "file", | |
856ae5c3 | 1950 | .instance_size = sizeof(BDRVRawState), |
030be321 | 1951 | .bdrv_needs_filename = true, |
856ae5c3 | 1952 | .bdrv_probe = NULL, /* no probe for protocols */ |
078896a9 | 1953 | .bdrv_parse_filename = raw_parse_filename, |
66f82cee | 1954 | .bdrv_file_open = raw_open, |
eeb6b45d JC |
1955 | .bdrv_reopen_prepare = raw_reopen_prepare, |
1956 | .bdrv_reopen_commit = raw_reopen_commit, | |
1957 | .bdrv_reopen_abort = raw_reopen_abort, | |
856ae5c3 | 1958 | .bdrv_close = raw_close, |
c282e1fd | 1959 | .bdrv_create = raw_create, |
3ac21627 | 1960 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
b6b8a333 | 1961 | .bdrv_co_get_block_status = raw_co_get_block_status, |
2ffa76c2 | 1962 | .bdrv_co_pwrite_zeroes = raw_co_pwrite_zeroes, |
3b46e624 | 1963 | |
9d52aa3c KW |
1964 | .bdrv_co_preadv = raw_co_preadv, |
1965 | .bdrv_co_pwritev = raw_co_pwritev, | |
b2e12bc6 | 1966 | .bdrv_aio_flush = raw_aio_flush, |
4da444a0 | 1967 | .bdrv_aio_pdiscard = raw_aio_pdiscard, |
c25f53b0 | 1968 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
1969 | .bdrv_io_plug = raw_aio_plug, |
1970 | .bdrv_io_unplug = raw_aio_unplug, | |
3c529d93 | 1971 | |
83f64091 FB |
1972 | .bdrv_truncate = raw_truncate, |
1973 | .bdrv_getlength = raw_getlength, | |
260a82e5 | 1974 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
1975 | .bdrv_get_allocated_file_size |
1976 | = raw_get_allocated_file_size, | |
0e7e1989 | 1977 | |
6f482f74 | 1978 | .create_opts = &raw_create_opts, |
83f64091 FB |
1979 | }; |
1980 | ||
19cb3738 FB |
1981 | /***********************************************/ |
1982 | /* host device */ | |
1983 | ||
83affaa6 | 1984 | #if defined(__APPLE__) && defined(__MACH__) |
98caa5bc JA |
1985 | static kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath, |
1986 | CFIndex maxPathSize, int flags); | |
d0855f12 | 1987 | static char *FindEjectableOpticalMedia(io_iterator_t *mediaIterator) |
19cb3738 | 1988 | { |
d0855f12 | 1989 | kern_return_t kernResult = KERN_FAILURE; |
19cb3738 FB |
1990 | mach_port_t masterPort; |
1991 | CFMutableDictionaryRef classesToMatch; | |
d0855f12 JA |
1992 | const char *matching_array[] = {kIODVDMediaClass, kIOCDMediaClass}; |
1993 | char *mediaType = NULL; | |
19cb3738 FB |
1994 | |
1995 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
1996 | if ( KERN_SUCCESS != kernResult ) { | |
1997 | printf( "IOMasterPort returned %d\n", kernResult ); | |
1998 | } | |
3b46e624 | 1999 | |
d0855f12 JA |
2000 | int index; |
2001 | for (index = 0; index < ARRAY_SIZE(matching_array); index++) { | |
2002 | classesToMatch = IOServiceMatching(matching_array[index]); | |
2003 | if (classesToMatch == NULL) { | |
2004 | error_report("IOServiceMatching returned NULL for %s", | |
2005 | matching_array[index]); | |
2006 | continue; | |
2007 | } | |
2008 | CFDictionarySetValue(classesToMatch, CFSTR(kIOMediaEjectableKey), | |
2009 | kCFBooleanTrue); | |
2010 | kernResult = IOServiceGetMatchingServices(masterPort, classesToMatch, | |
2011 | mediaIterator); | |
2012 | if (kernResult != KERN_SUCCESS) { | |
2013 | error_report("Note: IOServiceGetMatchingServices returned %d", | |
2014 | kernResult); | |
2015 | continue; | |
2016 | } | |
3b46e624 | 2017 | |
d0855f12 JA |
2018 | /* If a match was found, leave the loop */ |
2019 | if (*mediaIterator != 0) { | |
2020 | DPRINTF("Matching using %s\n", matching_array[index]); | |
2021 | mediaType = g_strdup(matching_array[index]); | |
2022 | break; | |
2023 | } | |
2024 | } | |
2025 | return mediaType; | |
19cb3738 FB |
2026 | } |
2027 | ||
98caa5bc JA |
2028 | kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath, |
2029 | CFIndex maxPathSize, int flags) | |
19cb3738 FB |
2030 | { |
2031 | io_object_t nextMedia; | |
2032 | kern_return_t kernResult = KERN_FAILURE; | |
2033 | *bsdPath = '\0'; | |
2034 | nextMedia = IOIteratorNext( mediaIterator ); | |
2035 | if ( nextMedia ) | |
2036 | { | |
2037 | CFTypeRef bsdPathAsCFString; | |
2038 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
2039 | if ( bsdPathAsCFString ) { | |
2040 | size_t devPathLength; | |
2041 | strcpy( bsdPath, _PATH_DEV ); | |
98caa5bc JA |
2042 | if (flags & BDRV_O_NOCACHE) { |
2043 | strcat(bsdPath, "r"); | |
2044 | } | |
19cb3738 FB |
2045 | devPathLength = strlen( bsdPath ); |
2046 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
2047 | kernResult = KERN_SUCCESS; | |
2048 | } | |
2049 | CFRelease( bsdPathAsCFString ); | |
2050 | } | |
2051 | IOObjectRelease( nextMedia ); | |
2052 | } | |
3b46e624 | 2053 | |
19cb3738 FB |
2054 | return kernResult; |
2055 | } | |
2056 | ||
d0855f12 JA |
2057 | /* Sets up a real cdrom for use in QEMU */ |
2058 | static bool setup_cdrom(char *bsd_path, Error **errp) | |
2059 | { | |
2060 | int index, num_of_test_partitions = 2, fd; | |
2061 | char test_partition[MAXPATHLEN]; | |
2062 | bool partition_found = false; | |
2063 | ||
2064 | /* look for a working partition */ | |
2065 | for (index = 0; index < num_of_test_partitions; index++) { | |
2066 | snprintf(test_partition, sizeof(test_partition), "%ss%d", bsd_path, | |
2067 | index); | |
2068 | fd = qemu_open(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE); | |
2069 | if (fd >= 0) { | |
2070 | partition_found = true; | |
2071 | qemu_close(fd); | |
2072 | break; | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | /* if a working partition on the device was not found */ | |
2077 | if (partition_found == false) { | |
2078 | error_setg(errp, "Failed to find a working partition on disc"); | |
2079 | } else { | |
2080 | DPRINTF("Using %s as optical disc\n", test_partition); | |
2081 | pstrcpy(bsd_path, MAXPATHLEN, test_partition); | |
2082 | } | |
2083 | return partition_found; | |
2084 | } | |
2085 | ||
2086 | /* Prints directions on mounting and unmounting a device */ | |
2087 | static void print_unmounting_directions(const char *file_name) | |
2088 | { | |
2089 | error_report("If device %s is mounted on the desktop, unmount" | |
2090 | " it first before using it in QEMU", file_name); | |
2091 | error_report("Command to unmount device: diskutil unmountDisk %s", | |
2092 | file_name); | |
2093 | error_report("Command to mount device: diskutil mountDisk %s", file_name); | |
2094 | } | |
2095 | ||
2096 | #endif /* defined(__APPLE__) && defined(__MACH__) */ | |
19cb3738 | 2097 | |
508c7cb3 CH |
2098 | static int hdev_probe_device(const char *filename) |
2099 | { | |
2100 | struct stat st; | |
2101 | ||
2102 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
2103 | if (strstart(filename, "/dev/cdrom", NULL)) | |
2104 | return 50; | |
2105 | ||
2106 | if (stat(filename, &st) >= 0 && | |
2107 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
2108 | return 100; | |
2109 | } | |
2110 | ||
2111 | return 0; | |
2112 | } | |
2113 | ||
da888d37 SH |
2114 | static int check_hdev_writable(BDRVRawState *s) |
2115 | { | |
2116 | #if defined(BLKROGET) | |
2117 | /* Linux block devices can be configured "read-only" using blockdev(8). | |
2118 | * This is independent of device node permissions and therefore open(2) | |
2119 | * with O_RDWR succeeds. Actual writes fail with EPERM. | |
2120 | * | |
2121 | * bdrv_open() is supposed to fail if the disk is read-only. Explicitly | |
2122 | * check for read-only block devices so that Linux block devices behave | |
2123 | * properly. | |
2124 | */ | |
2125 | struct stat st; | |
2126 | int readonly = 0; | |
2127 | ||
2128 | if (fstat(s->fd, &st)) { | |
2129 | return -errno; | |
2130 | } | |
2131 | ||
2132 | if (!S_ISBLK(st.st_mode)) { | |
2133 | return 0; | |
2134 | } | |
2135 | ||
2136 | if (ioctl(s->fd, BLKROGET, &readonly) < 0) { | |
2137 | return -errno; | |
2138 | } | |
2139 | ||
2140 | if (readonly) { | |
2141 | return -EACCES; | |
2142 | } | |
2143 | #endif /* defined(BLKROGET) */ | |
2144 | return 0; | |
2145 | } | |
2146 | ||
7af803d4 HR |
2147 | static void hdev_parse_filename(const char *filename, QDict *options, |
2148 | Error **errp) | |
2149 | { | |
2150 | /* The prefix is optional, just as for "file". */ | |
2151 | strstart(filename, "host_device:", &filename); | |
2152 | ||
2153 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
2154 | } | |
2155 | ||
3307ed7b DA |
2156 | static bool hdev_is_sg(BlockDriverState *bs) |
2157 | { | |
2158 | ||
2159 | #if defined(__linux__) | |
2160 | ||
0d4377b3 | 2161 | BDRVRawState *s = bs->opaque; |
3307ed7b DA |
2162 | struct stat st; |
2163 | struct sg_scsi_id scsiid; | |
2164 | int sg_version; | |
0d4377b3 KW |
2165 | int ret; |
2166 | ||
2167 | if (stat(bs->filename, &st) < 0 || !S_ISCHR(st.st_mode)) { | |
2168 | return false; | |
2169 | } | |
3307ed7b | 2170 | |
0d4377b3 KW |
2171 | ret = ioctl(s->fd, SG_GET_VERSION_NUM, &sg_version); |
2172 | if (ret < 0) { | |
2173 | return false; | |
2174 | } | |
2175 | ||
2176 | ret = ioctl(s->fd, SG_GET_SCSI_ID, &scsiid); | |
2177 | if (ret >= 0) { | |
3307ed7b DA |
2178 | DPRINTF("SG device found: type=%d, version=%d\n", |
2179 | scsiid.scsi_type, sg_version); | |
2180 | return true; | |
2181 | } | |
2182 | ||
2183 | #endif | |
2184 | ||
2185 | return false; | |
2186 | } | |
2187 | ||
015a1036 HR |
2188 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
2189 | Error **errp) | |
19cb3738 FB |
2190 | { |
2191 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2192 | Error *local_err = NULL; |
da888d37 | 2193 | int ret; |
a76bab49 | 2194 | |
83affaa6 | 2195 | #if defined(__APPLE__) && defined(__MACH__) |
3307ed7b | 2196 | const char *filename = qdict_get_str(options, "filename"); |
d0855f12 JA |
2197 | char bsd_path[MAXPATHLEN] = ""; |
2198 | bool error_occurred = false; | |
2199 | ||
2200 | /* If using a real cdrom */ | |
2201 | if (strcmp(filename, "/dev/cdrom") == 0) { | |
2202 | char *mediaType = NULL; | |
2203 | kern_return_t ret_val; | |
2204 | io_iterator_t mediaIterator = 0; | |
2205 | ||
2206 | mediaType = FindEjectableOpticalMedia(&mediaIterator); | |
2207 | if (mediaType == NULL) { | |
2208 | error_setg(errp, "Please make sure your CD/DVD is in the optical" | |
2209 | " drive"); | |
2210 | error_occurred = true; | |
2211 | goto hdev_open_Mac_error; | |
2212 | } | |
3307ed7b | 2213 | |
d0855f12 JA |
2214 | ret_val = GetBSDPath(mediaIterator, bsd_path, sizeof(bsd_path), flags); |
2215 | if (ret_val != KERN_SUCCESS) { | |
2216 | error_setg(errp, "Could not get BSD path for optical drive"); | |
2217 | error_occurred = true; | |
2218 | goto hdev_open_Mac_error; | |
2219 | } | |
2220 | ||
2221 | /* If a real optical drive was not found */ | |
2222 | if (bsd_path[0] == '\0') { | |
2223 | error_setg(errp, "Failed to obtain bsd path for optical drive"); | |
2224 | error_occurred = true; | |
2225 | goto hdev_open_Mac_error; | |
2226 | } | |
2227 | ||
2228 | /* If using a cdrom disc and finding a partition on the disc failed */ | |
2229 | if (strncmp(mediaType, kIOCDMediaClass, 9) == 0 && | |
2230 | setup_cdrom(bsd_path, errp) == false) { | |
2231 | print_unmounting_directions(bsd_path); | |
2232 | error_occurred = true; | |
2233 | goto hdev_open_Mac_error; | |
19cb3738 | 2234 | } |
3b46e624 | 2235 | |
d0855f12 JA |
2236 | qdict_put(options, "filename", qstring_from_str(bsd_path)); |
2237 | ||
2238 | hdev_open_Mac_error: | |
2239 | g_free(mediaType); | |
2240 | if (mediaIterator) { | |
2241 | IOObjectRelease(mediaIterator); | |
2242 | } | |
2243 | if (error_occurred) { | |
2244 | return -ENOENT; | |
2245 | } | |
19cb3738 | 2246 | } |
d0855f12 | 2247 | #endif /* defined(__APPLE__) && defined(__MACH__) */ |
19cb3738 FB |
2248 | |
2249 | s->type = FTYPE_FILE; | |
90babde0 | 2250 | |
e428e439 | 2251 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
da888d37 | 2252 | if (ret < 0) { |
621ff94d | 2253 | error_propagate(errp, local_err); |
d0855f12 JA |
2254 | #if defined(__APPLE__) && defined(__MACH__) |
2255 | if (*bsd_path) { | |
2256 | filename = bsd_path; | |
2257 | } | |
2258 | /* if a physical device experienced an error while being opened */ | |
2259 | if (strncmp(filename, "/dev/", 5) == 0) { | |
2260 | print_unmounting_directions(filename); | |
2261 | } | |
2262 | #endif /* defined(__APPLE__) && defined(__MACH__) */ | |
da888d37 SH |
2263 | return ret; |
2264 | } | |
2265 | ||
3307ed7b DA |
2266 | /* Since this does ioctl the device must be already opened */ |
2267 | bs->sg = hdev_is_sg(bs); | |
2268 | ||
da888d37 SH |
2269 | if (flags & BDRV_O_RDWR) { |
2270 | ret = check_hdev_writable(s); | |
2271 | if (ret < 0) { | |
2272 | raw_close(bs); | |
e428e439 | 2273 | error_setg_errno(errp, -ret, "The device is not writable"); |
da888d37 SH |
2274 | return ret; |
2275 | } | |
2276 | } | |
2277 | ||
2278 | return ret; | |
19cb3738 FB |
2279 | } |
2280 | ||
03ff3ca3 | 2281 | #if defined(__linux__) |
221f715d | 2282 | |
7c84b1b8 | 2283 | static BlockAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
221f715d | 2284 | unsigned long int req, void *buf, |
097310b5 | 2285 | BlockCompletionFunc *cb, void *opaque) |
221f715d | 2286 | { |
f141eafe | 2287 | BDRVRawState *s = bs->opaque; |
c208e8c2 | 2288 | RawPosixAIOData *acb; |
c4d9d196 | 2289 | ThreadPool *pool; |
221f715d | 2290 | |
f141eafe AL |
2291 | if (fd_open(bs) < 0) |
2292 | return NULL; | |
c208e8c2 | 2293 | |
c84b3192 | 2294 | acb = g_new(RawPosixAIOData, 1); |
c208e8c2 PB |
2295 | acb->bs = bs; |
2296 | acb->aio_type = QEMU_AIO_IOCTL; | |
2297 | acb->aio_fildes = s->fd; | |
2298 | acb->aio_offset = 0; | |
2299 | acb->aio_ioctl_buf = buf; | |
2300 | acb->aio_ioctl_cmd = req; | |
c4d9d196 SH |
2301 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
2302 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
221f715d | 2303 | } |
f709623b | 2304 | #endif /* linux */ |
221f715d | 2305 | |
9f23011a BS |
2306 | static int fd_open(BlockDriverState *bs) |
2307 | { | |
2308 | BDRVRawState *s = bs->opaque; | |
2309 | ||
2310 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
2311 | if (s->fd >= 0) | |
2312 | return 0; | |
2313 | return -EIO; | |
2314 | } | |
04eeb8b6 | 2315 | |
4da444a0 EB |
2316 | static coroutine_fn BlockAIOCB *hdev_aio_pdiscard(BlockDriverState *bs, |
2317 | int64_t offset, int count, | |
097310b5 | 2318 | BlockCompletionFunc *cb, void *opaque) |
c36dd8a0 AF |
2319 | { |
2320 | BDRVRawState *s = bs->opaque; | |
2321 | ||
2322 | if (fd_open(bs) < 0) { | |
2323 | return NULL; | |
2324 | } | |
4da444a0 | 2325 | return paio_submit(bs, s->fd, offset, NULL, count, |
c36dd8a0 AF |
2326 | cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); |
2327 | } | |
2328 | ||
2ffa76c2 EB |
2329 | static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs, |
2330 | int64_t offset, int count, BdrvRequestFlags flags) | |
d0b4503e PB |
2331 | { |
2332 | BDRVRawState *s = bs->opaque; | |
2333 | int rc; | |
2334 | ||
2335 | rc = fd_open(bs); | |
2336 | if (rc < 0) { | |
2337 | return rc; | |
2338 | } | |
2339 | if (!(flags & BDRV_REQ_MAY_UNMAP)) { | |
2ffa76c2 | 2340 | return paio_submit_co(bs, s->fd, offset, NULL, count, |
97a2ae34 PB |
2341 | QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV); |
2342 | } else if (s->discard_zeroes) { | |
2ffa76c2 | 2343 | return paio_submit_co(bs, s->fd, offset, NULL, count, |
97a2ae34 | 2344 | QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); |
d0b4503e | 2345 | } |
97a2ae34 | 2346 | return -ENOTSUP; |
d0b4503e PB |
2347 | } |
2348 | ||
6f482f74 | 2349 | static int hdev_create(const char *filename, QemuOpts *opts, |
d5124c00 | 2350 | Error **errp) |
93c65b47 AL |
2351 | { |
2352 | int fd; | |
2353 | int ret = 0; | |
2354 | struct stat stat_buf; | |
0e7e1989 | 2355 | int64_t total_size = 0; |
cc28c6aa HR |
2356 | bool has_prefix; |
2357 | ||
f709623b HR |
2358 | /* This function is used by both protocol block drivers and therefore either |
2359 | * of these prefixes may be given. | |
cc28c6aa HR |
2360 | * The return value has to be stored somewhere, otherwise this is an error |
2361 | * due to -Werror=unused-value. */ | |
2362 | has_prefix = | |
2363 | strstart(filename, "host_device:", &filename) || | |
f709623b | 2364 | strstart(filename, "host_cdrom:" , &filename); |
cc28c6aa HR |
2365 | |
2366 | (void)has_prefix; | |
93c65b47 | 2367 | |
bdd03cdf HR |
2368 | ret = raw_normalize_devicepath(&filename); |
2369 | if (ret < 0) { | |
2370 | error_setg_errno(errp, -ret, "Could not normalize device path"); | |
2371 | return ret; | |
2372 | } | |
2373 | ||
0e7e1989 | 2374 | /* Read out options */ |
180e9526 HT |
2375 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
2376 | BDRV_SECTOR_SIZE); | |
93c65b47 | 2377 | |
6165f4d8 | 2378 | fd = qemu_open(filename, O_WRONLY | O_BINARY); |
e428e439 HR |
2379 | if (fd < 0) { |
2380 | ret = -errno; | |
2381 | error_setg_errno(errp, -ret, "Could not open device"); | |
2382 | return ret; | |
2383 | } | |
93c65b47 | 2384 | |
e428e439 | 2385 | if (fstat(fd, &stat_buf) < 0) { |
57e69b7d | 2386 | ret = -errno; |
e428e439 HR |
2387 | error_setg_errno(errp, -ret, "Could not stat device"); |
2388 | } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) { | |
2389 | error_setg(errp, | |
2390 | "The given file is neither a block nor a character device"); | |
57e69b7d | 2391 | ret = -ENODEV; |
180e9526 | 2392 | } else if (lseek(fd, 0, SEEK_END) < total_size) { |
e428e439 | 2393 | error_setg(errp, "Device is too small"); |
93c65b47 | 2394 | ret = -ENOSPC; |
e428e439 | 2395 | } |
93c65b47 | 2396 | |
2e1e79da | 2397 | qemu_close(fd); |
93c65b47 AL |
2398 | return ret; |
2399 | } | |
2400 | ||
5efa9d5a | 2401 | static BlockDriver bdrv_host_device = { |
0b4ce02e | 2402 | .format_name = "host_device", |
84a12e66 | 2403 | .protocol_name = "host_device", |
0b4ce02e | 2404 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2405 | .bdrv_needs_filename = true, |
0b4ce02e | 2406 | .bdrv_probe_device = hdev_probe_device, |
7af803d4 | 2407 | .bdrv_parse_filename = hdev_parse_filename, |
66f82cee | 2408 | .bdrv_file_open = hdev_open, |
0b4ce02e | 2409 | .bdrv_close = raw_close, |
1bc6b705 JC |
2410 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2411 | .bdrv_reopen_commit = raw_reopen_commit, | |
2412 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2413 | .bdrv_create = hdev_create, |
6f482f74 | 2414 | .create_opts = &raw_create_opts, |
2ffa76c2 | 2415 | .bdrv_co_pwrite_zeroes = hdev_co_pwrite_zeroes, |
3b46e624 | 2416 | |
9d52aa3c KW |
2417 | .bdrv_co_preadv = raw_co_preadv, |
2418 | .bdrv_co_pwritev = raw_co_pwritev, | |
b2e12bc6 | 2419 | .bdrv_aio_flush = raw_aio_flush, |
4da444a0 | 2420 | .bdrv_aio_pdiscard = hdev_aio_pdiscard, |
c25f53b0 | 2421 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2422 | .bdrv_io_plug = raw_aio_plug, |
2423 | .bdrv_io_unplug = raw_aio_unplug, | |
3c529d93 | 2424 | |
55b949c8 | 2425 | .bdrv_truncate = raw_truncate, |
e60f469c | 2426 | .bdrv_getlength = raw_getlength, |
260a82e5 | 2427 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
2428 | .bdrv_get_allocated_file_size |
2429 | = raw_get_allocated_file_size, | |
1a9335e4 ET |
2430 | .bdrv_probe_blocksizes = hdev_probe_blocksizes, |
2431 | .bdrv_probe_geometry = hdev_probe_geometry, | |
19cb3738 | 2432 | |
f3a5d3f8 | 2433 | /* generic scsi device */ |
63ec93db | 2434 | #ifdef __linux__ |
63ec93db CH |
2435 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
2436 | #endif | |
f3a5d3f8 CH |
2437 | }; |
2438 | ||
18fa1c42 HR |
2439 | #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
2440 | static void cdrom_parse_filename(const char *filename, QDict *options, | |
2441 | Error **errp) | |
2442 | { | |
2443 | /* The prefix is optional, just as for "file". */ | |
2444 | strstart(filename, "host_cdrom:", &filename); | |
2445 | ||
2446 | qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename))); | |
2447 | } | |
2448 | #endif | |
2449 | ||
2450 | #ifdef __linux__ | |
015a1036 HR |
2451 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2452 | Error **errp) | |
f3a5d3f8 CH |
2453 | { |
2454 | BDRVRawState *s = bs->opaque; | |
2455 | ||
f3a5d3f8 CH |
2456 | s->type = FTYPE_CD; |
2457 | ||
19a3da7f | 2458 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
9be38598 | 2459 | return raw_open_common(bs, options, flags, O_NONBLOCK, errp); |
f3a5d3f8 CH |
2460 | } |
2461 | ||
508c7cb3 CH |
2462 | static int cdrom_probe_device(const char *filename) |
2463 | { | |
3baf720e CR |
2464 | int fd, ret; |
2465 | int prio = 0; | |
343f8568 | 2466 | struct stat st; |
3baf720e | 2467 | |
6165f4d8 | 2468 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
3baf720e CR |
2469 | if (fd < 0) { |
2470 | goto out; | |
2471 | } | |
343f8568 JS |
2472 | ret = fstat(fd, &st); |
2473 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
2474 | goto outc; | |
2475 | } | |
3baf720e CR |
2476 | |
2477 | /* Attempt to detect via a CDROM specific ioctl */ | |
2478 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
2479 | if (ret >= 0) | |
2480 | prio = 100; | |
2481 | ||
343f8568 | 2482 | outc: |
2e1e79da | 2483 | qemu_close(fd); |
3baf720e CR |
2484 | out: |
2485 | return prio; | |
508c7cb3 CH |
2486 | } |
2487 | ||
e031f750 | 2488 | static bool cdrom_is_inserted(BlockDriverState *bs) |
f3a5d3f8 CH |
2489 | { |
2490 | BDRVRawState *s = bs->opaque; | |
2491 | int ret; | |
2492 | ||
2493 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
e031f750 | 2494 | return ret == CDS_DISC_OK; |
f3a5d3f8 CH |
2495 | } |
2496 | ||
f36f3949 | 2497 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2498 | { |
2499 | BDRVRawState *s = bs->opaque; | |
2500 | ||
2501 | if (eject_flag) { | |
2502 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
2503 | perror("CDROMEJECT"); | |
2504 | } else { | |
2505 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
2506 | perror("CDROMEJECT"); | |
2507 | } | |
f3a5d3f8 CH |
2508 | } |
2509 | ||
025e849a | 2510 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2511 | { |
2512 | BDRVRawState *s = bs->opaque; | |
2513 | ||
2514 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
2515 | /* | |
2516 | * Note: an error can happen if the distribution automatically | |
2517 | * mounts the CD-ROM | |
2518 | */ | |
2519 | /* perror("CDROM_LOCKDOOR"); */ | |
2520 | } | |
f3a5d3f8 CH |
2521 | } |
2522 | ||
2523 | static BlockDriver bdrv_host_cdrom = { | |
2524 | .format_name = "host_cdrom", | |
84a12e66 | 2525 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2526 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2527 | .bdrv_needs_filename = true, |
508c7cb3 | 2528 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2529 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2530 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2531 | .bdrv_close = raw_close, |
1bc6b705 JC |
2532 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2533 | .bdrv_reopen_commit = raw_reopen_commit, | |
2534 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2535 | .bdrv_create = hdev_create, |
6f482f74 | 2536 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2537 | |
9d52aa3c KW |
2538 | |
2539 | .bdrv_co_preadv = raw_co_preadv, | |
2540 | .bdrv_co_pwritev = raw_co_pwritev, | |
b2e12bc6 | 2541 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2542 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2543 | .bdrv_io_plug = raw_aio_plug, |
2544 | .bdrv_io_unplug = raw_aio_unplug, | |
f3a5d3f8 | 2545 | |
55b949c8 | 2546 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2547 | .bdrv_getlength = raw_getlength, |
2548 | .has_variable_length = true, | |
4a1d5e1f FZ |
2549 | .bdrv_get_allocated_file_size |
2550 | = raw_get_allocated_file_size, | |
f3a5d3f8 CH |
2551 | |
2552 | /* removable device support */ | |
2553 | .bdrv_is_inserted = cdrom_is_inserted, | |
2554 | .bdrv_eject = cdrom_eject, | |
025e849a | 2555 | .bdrv_lock_medium = cdrom_lock_medium, |
f3a5d3f8 CH |
2556 | |
2557 | /* generic scsi device */ | |
63ec93db | 2558 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
f3a5d3f8 CH |
2559 | }; |
2560 | #endif /* __linux__ */ | |
2561 | ||
a167ba50 | 2562 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
511018e4 AT |
2563 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
2564 | Error **errp) | |
f3a5d3f8 CH |
2565 | { |
2566 | BDRVRawState *s = bs->opaque; | |
e428e439 | 2567 | Error *local_err = NULL; |
f3a5d3f8 CH |
2568 | int ret; |
2569 | ||
2570 | s->type = FTYPE_CD; | |
2571 | ||
e428e439 HR |
2572 | ret = raw_open_common(bs, options, flags, 0, &local_err); |
2573 | if (ret) { | |
621ff94d | 2574 | error_propagate(errp, local_err); |
f3a5d3f8 | 2575 | return ret; |
e428e439 | 2576 | } |
f3a5d3f8 | 2577 | |
9b2260cb | 2578 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2579 | ioctl(s->fd, CDIOCALLOW); |
2580 | return 0; | |
2581 | } | |
2582 | ||
508c7cb3 CH |
2583 | static int cdrom_probe_device(const char *filename) |
2584 | { | |
2585 | if (strstart(filename, "/dev/cd", NULL) || | |
2586 | strstart(filename, "/dev/acd", NULL)) | |
2587 | return 100; | |
2588 | return 0; | |
2589 | } | |
2590 | ||
f3a5d3f8 CH |
2591 | static int cdrom_reopen(BlockDriverState *bs) |
2592 | { | |
2593 | BDRVRawState *s = bs->opaque; | |
2594 | int fd; | |
2595 | ||
2596 | /* | |
2597 | * Force reread of possibly changed/newly loaded disc, | |
2598 | * FreeBSD seems to not notice sometimes... | |
2599 | */ | |
2600 | if (s->fd >= 0) | |
2e1e79da | 2601 | qemu_close(s->fd); |
6165f4d8 | 2602 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
f3a5d3f8 CH |
2603 | if (fd < 0) { |
2604 | s->fd = -1; | |
2605 | return -EIO; | |
2606 | } | |
2607 | s->fd = fd; | |
2608 | ||
9b2260cb | 2609 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
2610 | ioctl(s->fd, CDIOCALLOW); |
2611 | return 0; | |
2612 | } | |
2613 | ||
e031f750 | 2614 | static bool cdrom_is_inserted(BlockDriverState *bs) |
f3a5d3f8 CH |
2615 | { |
2616 | return raw_getlength(bs) > 0; | |
2617 | } | |
2618 | ||
f36f3949 | 2619 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
2620 | { |
2621 | BDRVRawState *s = bs->opaque; | |
2622 | ||
2623 | if (s->fd < 0) | |
822e1cd1 | 2624 | return; |
f3a5d3f8 CH |
2625 | |
2626 | (void) ioctl(s->fd, CDIOCALLOW); | |
2627 | ||
2628 | if (eject_flag) { | |
2629 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
2630 | perror("CDIOCEJECT"); | |
2631 | } else { | |
2632 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
2633 | perror("CDIOCCLOSE"); | |
2634 | } | |
2635 | ||
822e1cd1 | 2636 | cdrom_reopen(bs); |
f3a5d3f8 CH |
2637 | } |
2638 | ||
025e849a | 2639 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
2640 | { |
2641 | BDRVRawState *s = bs->opaque; | |
2642 | ||
2643 | if (s->fd < 0) | |
7bf37fed | 2644 | return; |
f3a5d3f8 CH |
2645 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
2646 | /* | |
2647 | * Note: an error can happen if the distribution automatically | |
2648 | * mounts the CD-ROM | |
2649 | */ | |
2650 | /* perror("CDROM_LOCKDOOR"); */ | |
2651 | } | |
f3a5d3f8 CH |
2652 | } |
2653 | ||
2654 | static BlockDriver bdrv_host_cdrom = { | |
2655 | .format_name = "host_cdrom", | |
84a12e66 | 2656 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 2657 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2658 | .bdrv_needs_filename = true, |
508c7cb3 | 2659 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 2660 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 2661 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 2662 | .bdrv_close = raw_close, |
1bc6b705 JC |
2663 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2664 | .bdrv_reopen_commit = raw_reopen_commit, | |
2665 | .bdrv_reopen_abort = raw_reopen_abort, | |
c282e1fd | 2666 | .bdrv_create = hdev_create, |
6f482f74 | 2667 | .create_opts = &raw_create_opts, |
f3a5d3f8 | 2668 | |
9d52aa3c KW |
2669 | .bdrv_co_preadv = raw_co_preadv, |
2670 | .bdrv_co_pwritev = raw_co_pwritev, | |
b2e12bc6 | 2671 | .bdrv_aio_flush = raw_aio_flush, |
c25f53b0 | 2672 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2673 | .bdrv_io_plug = raw_aio_plug, |
2674 | .bdrv_io_unplug = raw_aio_unplug, | |
f3a5d3f8 | 2675 | |
55b949c8 | 2676 | .bdrv_truncate = raw_truncate, |
b94a2610 KW |
2677 | .bdrv_getlength = raw_getlength, |
2678 | .has_variable_length = true, | |
4a1d5e1f FZ |
2679 | .bdrv_get_allocated_file_size |
2680 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 2681 | |
19cb3738 | 2682 | /* removable device support */ |
f3a5d3f8 CH |
2683 | .bdrv_is_inserted = cdrom_is_inserted, |
2684 | .bdrv_eject = cdrom_eject, | |
025e849a | 2685 | .bdrv_lock_medium = cdrom_lock_medium, |
19cb3738 | 2686 | }; |
f3a5d3f8 | 2687 | #endif /* __FreeBSD__ */ |
5efa9d5a | 2688 | |
84a12e66 | 2689 | static void bdrv_file_init(void) |
5efa9d5a | 2690 | { |
508c7cb3 CH |
2691 | /* |
2692 | * Register all the drivers. Note that order is important, the driver | |
2693 | * registered last will get probed first. | |
2694 | */ | |
84a12e66 | 2695 | bdrv_register(&bdrv_file); |
5efa9d5a | 2696 | bdrv_register(&bdrv_host_device); |
f3a5d3f8 | 2697 | #ifdef __linux__ |
f3a5d3f8 CH |
2698 | bdrv_register(&bdrv_host_cdrom); |
2699 | #endif | |
a167ba50 | 2700 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
2701 | bdrv_register(&bdrv_host_cdrom); |
2702 | #endif | |
5efa9d5a AL |
2703 | } |
2704 | ||
84a12e66 | 2705 | block_init(bdrv_file_init); |