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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 | */ | |
922a01a0 | 24 | |
80c71a24 | 25 | #include "qemu/osdep.h" |
da34e65c | 26 | #include "qapi/error.h" |
f348b6d1 | 27 | #include "qemu/cutils.h" |
d49b6836 | 28 | #include "qemu/error-report.h" |
737e150e | 29 | #include "block/block_int.h" |
1de7afc9 | 30 | #include "qemu/module.h" |
922a01a0 | 31 | #include "qemu/option.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" |
452fcdbc | 36 | #include "qapi/qmp/qdict.h" |
d49b6836 | 37 | #include "qapi/qmp/qstring.h" |
83f64091 | 38 | |
7c9e5276 PB |
39 | #include "scsi/pr-manager.h" |
40 | #include "scsi/constants.h" | |
41 | ||
83affaa6 | 42 | #if defined(__APPLE__) && (__MACH__) |
83f64091 FB |
43 | #include <paths.h> |
44 | #include <sys/param.h> | |
45 | #include <IOKit/IOKitLib.h> | |
46 | #include <IOKit/IOBSD.h> | |
47 | #include <IOKit/storage/IOMediaBSDClient.h> | |
48 | #include <IOKit/storage/IOMedia.h> | |
49 | #include <IOKit/storage/IOCDMedia.h> | |
50 | //#include <IOKit/storage/IOCDTypes.h> | |
d0855f12 | 51 | #include <IOKit/storage/IODVDMedia.h> |
83f64091 FB |
52 | #include <CoreFoundation/CoreFoundation.h> |
53 | #endif | |
54 | ||
55 | #ifdef __sun__ | |
2e9671da | 56 | #define _POSIX_PTHREAD_SEMANTICS 1 |
83f64091 FB |
57 | #include <sys/dkio.h> |
58 | #endif | |
19cb3738 FB |
59 | #ifdef __linux__ |
60 | #include <sys/ioctl.h> | |
05acda4d | 61 | #include <sys/param.h> |
1efad060 | 62 | #include <sys/syscall.h> |
19cb3738 FB |
63 | #include <linux/cdrom.h> |
64 | #include <linux/fd.h> | |
5500316d | 65 | #include <linux/fs.h> |
1a9335e4 | 66 | #include <linux/hdreg.h> |
3307ed7b | 67 | #include <scsi/sg.h> |
1a9335e4 ET |
68 | #ifdef __s390__ |
69 | #include <asm/dasd.h> | |
70 | #endif | |
4ab15590 CL |
71 | #ifndef FS_NOCOW_FL |
72 | #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ | |
73 | #endif | |
5500316d | 74 | #endif |
b953f075 | 75 | #if defined(CONFIG_FALLOCATE_PUNCH_HOLE) || defined(CONFIG_FALLOCATE_ZERO_RANGE) |
3d4fa43e KK |
76 | #include <linux/falloc.h> |
77 | #endif | |
a167ba50 | 78 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
1cb6c3fd | 79 | #include <sys/disk.h> |
9f23011a | 80 | #include <sys/cdio.h> |
1cb6c3fd | 81 | #endif |
83f64091 | 82 | |
128ab2ff BS |
83 | #ifdef __OpenBSD__ |
84 | #include <sys/ioctl.h> | |
85 | #include <sys/disklabel.h> | |
86 | #include <sys/dkio.h> | |
87 | #endif | |
88 | ||
d1f6fd8d CE |
89 | #ifdef __NetBSD__ |
90 | #include <sys/ioctl.h> | |
91 | #include <sys/disklabel.h> | |
92 | #include <sys/dkio.h> | |
93 | #include <sys/disk.h> | |
94 | #endif | |
95 | ||
c5e97233 BS |
96 | #ifdef __DragonFly__ |
97 | #include <sys/ioctl.h> | |
98 | #include <sys/diskslice.h> | |
99 | #endif | |
100 | ||
dce512de CH |
101 | #ifdef CONFIG_XFS |
102 | #include <xfs/xfs.h> | |
103 | #endif | |
104 | ||
4f7d28d7 | 105 | #include "trace.h" |
8c05dbf9 | 106 | |
f6465578 AL |
107 | /* OS X does not have O_DSYNC */ |
108 | #ifndef O_DSYNC | |
1c27a8b3 | 109 | #ifdef O_SYNC |
7ab064d2 | 110 | #define O_DSYNC O_SYNC |
1c27a8b3 JA |
111 | #elif defined(O_FSYNC) |
112 | #define O_DSYNC O_FSYNC | |
113 | #endif | |
f6465578 AL |
114 | #endif |
115 | ||
9f7965c7 AL |
116 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
117 | #ifndef O_DIRECT | |
118 | #define O_DIRECT O_DSYNC | |
119 | #endif | |
120 | ||
19cb3738 FB |
121 | #define FTYPE_FILE 0 |
122 | #define FTYPE_CD 1 | |
83f64091 | 123 | |
581b9e29 CH |
124 | #define MAX_BLOCKSIZE 4096 |
125 | ||
244a5668 FZ |
126 | /* Posix file locking bytes. Libvirt takes byte 0, we start from higher bytes, |
127 | * leaving a few more bytes for its future use. */ | |
128 | #define RAW_LOCK_PERM_BASE 100 | |
129 | #define RAW_LOCK_SHARED_BASE 200 | |
130 | ||
19cb3738 FB |
131 | typedef struct BDRVRawState { |
132 | int fd; | |
244a5668 | 133 | bool use_lock; |
19cb3738 | 134 | int type; |
0e1d8f4c | 135 | int open_flags; |
c25f53b0 PB |
136 | size_t buf_align; |
137 | ||
244a5668 FZ |
138 | /* The current permissions. */ |
139 | uint64_t perm; | |
140 | uint64_t shared_perm; | |
141 | ||
2996ffad | 142 | /* The perms bits whose corresponding bytes are already locked in |
f2e3af29 | 143 | * s->fd. */ |
2996ffad FZ |
144 | uint64_t locked_perm; |
145 | uint64_t locked_shared_perm; | |
146 | ||
6ceabe6f | 147 | int perm_change_fd; |
e0c9cf3a KW |
148 | BDRVReopenState *reopen_state; |
149 | ||
dce512de | 150 | #ifdef CONFIG_XFS |
260a82e5 | 151 | bool is_xfs:1; |
dce512de | 152 | #endif |
260a82e5 | 153 | bool has_discard:1; |
97a2ae34 | 154 | bool has_write_zeroes:1; |
260a82e5 | 155 | bool discard_zeroes:1; |
0a4279d9 | 156 | bool use_linux_aio:1; |
e5bcf967 | 157 | bool page_cache_inconsistent:1; |
d50d8222 | 158 | bool has_fallocate; |
3cad8307 | 159 | bool needs_alignment; |
f357fcd8 | 160 | bool drop_cache; |
31be8a2a | 161 | bool check_cache_dropped; |
7c9e5276 PB |
162 | |
163 | PRManager *pr_mgr; | |
19cb3738 FB |
164 | } BDRVRawState; |
165 | ||
eeb6b45d JC |
166 | typedef struct BDRVRawReopenState { |
167 | int fd; | |
168 | int open_flags; | |
f357fcd8 | 169 | bool drop_cache; |
31be8a2a | 170 | bool check_cache_dropped; |
eeb6b45d JC |
171 | } BDRVRawReopenState; |
172 | ||
19cb3738 | 173 | static int fd_open(BlockDriverState *bs); |
22afa7b5 | 174 | static int64_t raw_getlength(BlockDriverState *bs); |
83f64091 | 175 | |
de81a169 PB |
176 | typedef struct RawPosixAIOData { |
177 | BlockDriverState *bs; | |
d57c44d0 | 178 | int aio_type; |
de81a169 | 179 | int aio_fildes; |
d57c44d0 | 180 | |
de81a169 | 181 | off_t aio_offset; |
d57c44d0 KW |
182 | uint64_t aio_nbytes; |
183 | ||
93f4e2ff | 184 | union { |
d57c44d0 KW |
185 | struct { |
186 | struct iovec *iov; | |
187 | int niov; | |
188 | } io; | |
189 | struct { | |
190 | uint64_t cmd; | |
191 | void *buf; | |
192 | } ioctl; | |
93f4e2ff KW |
193 | struct { |
194 | int aio_fd2; | |
195 | off_t aio_offset2; | |
d57c44d0 | 196 | } copy_range; |
93f4e2ff KW |
197 | struct { |
198 | PreallocMode prealloc; | |
199 | Error **errp; | |
d57c44d0 | 200 | } truncate; |
93f4e2ff | 201 | }; |
de81a169 PB |
202 | } RawPosixAIOData; |
203 | ||
a167ba50 | 204 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 | 205 | static int cdrom_reopen(BlockDriverState *bs); |
9f23011a BS |
206 | #endif |
207 | ||
1de1ae0a | 208 | #if defined(__NetBSD__) |
db0754df | 209 | static int raw_normalize_devicepath(const char **filename, Error **errp) |
1de1ae0a CE |
210 | { |
211 | static char namebuf[PATH_MAX]; | |
212 | const char *dp, *fname; | |
213 | struct stat sb; | |
214 | ||
215 | fname = *filename; | |
216 | dp = strrchr(fname, '/'); | |
217 | if (lstat(fname, &sb) < 0) { | |
db0754df | 218 | error_setg_errno(errp, errno, "%s: stat failed", fname); |
1de1ae0a CE |
219 | return -errno; |
220 | } | |
221 | ||
222 | if (!S_ISBLK(sb.st_mode)) { | |
223 | return 0; | |
224 | } | |
225 | ||
226 | if (dp == NULL) { | |
227 | snprintf(namebuf, PATH_MAX, "r%s", fname); | |
228 | } else { | |
229 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", | |
230 | (int)(dp - fname), fname, dp + 1); | |
231 | } | |
1de1ae0a | 232 | *filename = namebuf; |
db0754df | 233 | warn_report("%s is a block device, using %s", fname, *filename); |
1de1ae0a CE |
234 | |
235 | return 0; | |
236 | } | |
237 | #else | |
db0754df | 238 | static int raw_normalize_devicepath(const char **filename, Error **errp) |
1de1ae0a CE |
239 | { |
240 | return 0; | |
241 | } | |
242 | #endif | |
243 | ||
8a4ed0d1 ET |
244 | /* |
245 | * Get logical block size via ioctl. On success store it in @sector_size_p. | |
246 | */ | |
247 | static int probe_logical_blocksize(int fd, unsigned int *sector_size_p) | |
c25f53b0 | 248 | { |
c25f53b0 | 249 | unsigned int sector_size; |
8a4ed0d1 | 250 | bool success = false; |
700f9ce0 | 251 | int i; |
c25f53b0 | 252 | |
8a4ed0d1 | 253 | errno = ENOTSUP; |
700f9ce0 | 254 | static const unsigned long ioctl_list[] = { |
c25f53b0 | 255 | #ifdef BLKSSZGET |
700f9ce0 | 256 | BLKSSZGET, |
c25f53b0 PB |
257 | #endif |
258 | #ifdef DKIOCGETBLOCKSIZE | |
700f9ce0 | 259 | DKIOCGETBLOCKSIZE, |
c25f53b0 PB |
260 | #endif |
261 | #ifdef DIOCGSECTORSIZE | |
700f9ce0 | 262 | DIOCGSECTORSIZE, |
c25f53b0 | 263 | #endif |
700f9ce0 PM |
264 | }; |
265 | ||
266 | /* Try a few ioctls to get the right size */ | |
267 | for (i = 0; i < (int)ARRAY_SIZE(ioctl_list); i++) { | |
268 | if (ioctl(fd, ioctl_list[i], §or_size) >= 0) { | |
269 | *sector_size_p = sector_size; | |
270 | success = true; | |
271 | } | |
272 | } | |
8a4ed0d1 ET |
273 | |
274 | return success ? 0 : -errno; | |
275 | } | |
276 | ||
1a9335e4 ET |
277 | /** |
278 | * Get physical block size of @fd. | |
279 | * On success, store it in @blk_size and return 0. | |
280 | * On failure, return -errno. | |
281 | */ | |
282 | static int probe_physical_blocksize(int fd, unsigned int *blk_size) | |
283 | { | |
284 | #ifdef BLKPBSZGET | |
285 | if (ioctl(fd, BLKPBSZGET, blk_size) < 0) { | |
286 | return -errno; | |
287 | } | |
288 | return 0; | |
289 | #else | |
290 | return -ENOTSUP; | |
291 | #endif | |
292 | } | |
293 | ||
22d182e8 SH |
294 | /* Check if read is allowed with given memory buffer and length. |
295 | * | |
296 | * This function is used to check O_DIRECT memory buffer and request alignment. | |
297 | */ | |
298 | static bool raw_is_io_aligned(int fd, void *buf, size_t len) | |
299 | { | |
300 | ssize_t ret = pread(fd, buf, len, 0); | |
301 | ||
302 | if (ret >= 0) { | |
303 | return true; | |
304 | } | |
305 | ||
306 | #ifdef __linux__ | |
307 | /* The Linux kernel returns EINVAL for misaligned O_DIRECT reads. Ignore | |
308 | * other errors (e.g. real I/O error), which could happen on a failed | |
309 | * drive, since we only care about probing alignment. | |
310 | */ | |
311 | if (errno != EINVAL) { | |
312 | return true; | |
313 | } | |
314 | #endif | |
315 | ||
316 | return false; | |
317 | } | |
318 | ||
8a4ed0d1 ET |
319 | static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp) |
320 | { | |
321 | BDRVRawState *s = bs->opaque; | |
322 | char *buf; | |
459b4e66 | 323 | size_t max_align = MAX(MAX_BLOCKSIZE, getpagesize()); |
8a4ed0d1 | 324 | |
b192af8a | 325 | /* For SCSI generic devices the alignment is not really used. |
8a4ed0d1 | 326 | With buffered I/O, we don't have any restrictions. */ |
b192af8a | 327 | if (bdrv_is_sg(bs) || !s->needs_alignment) { |
a5b8dd2c | 328 | bs->bl.request_alignment = 1; |
8a4ed0d1 ET |
329 | s->buf_align = 1; |
330 | return; | |
331 | } | |
332 | ||
a5b8dd2c | 333 | bs->bl.request_alignment = 0; |
8a4ed0d1 ET |
334 | s->buf_align = 0; |
335 | /* Let's try to use the logical blocksize for the alignment. */ | |
a5b8dd2c EB |
336 | if (probe_logical_blocksize(fd, &bs->bl.request_alignment) < 0) { |
337 | bs->bl.request_alignment = 0; | |
8a4ed0d1 | 338 | } |
c25f53b0 PB |
339 | #ifdef CONFIG_XFS |
340 | if (s->is_xfs) { | |
341 | struct dioattr da; | |
df26a350 | 342 | if (xfsctl(NULL, fd, XFS_IOC_DIOINFO, &da) >= 0) { |
a5b8dd2c | 343 | bs->bl.request_alignment = da.d_miniosz; |
c25f53b0 PB |
344 | /* The kernel returns wrong information for d_mem */ |
345 | /* s->buf_align = da.d_mem; */ | |
346 | } | |
347 | } | |
348 | #endif | |
349 | ||
350 | /* If we could not get the sizes so far, we can only guess them */ | |
351 | if (!s->buf_align) { | |
352 | size_t align; | |
459b4e66 DL |
353 | buf = qemu_memalign(max_align, 2 * max_align); |
354 | for (align = 512; align <= max_align; align <<= 1) { | |
355 | if (raw_is_io_aligned(fd, buf + align, max_align)) { | |
c25f53b0 PB |
356 | s->buf_align = align; |
357 | break; | |
358 | } | |
359 | } | |
360 | qemu_vfree(buf); | |
361 | } | |
362 | ||
a5b8dd2c | 363 | if (!bs->bl.request_alignment) { |
c25f53b0 | 364 | size_t align; |
459b4e66 DL |
365 | buf = qemu_memalign(s->buf_align, max_align); |
366 | for (align = 512; align <= max_align; align <<= 1) { | |
22d182e8 | 367 | if (raw_is_io_aligned(fd, buf, align)) { |
a5b8dd2c | 368 | bs->bl.request_alignment = align; |
c25f53b0 PB |
369 | break; |
370 | } | |
371 | } | |
372 | qemu_vfree(buf); | |
373 | } | |
df26a350 | 374 | |
a5b8dd2c | 375 | if (!s->buf_align || !bs->bl.request_alignment) { |
8cc9c6e9 EB |
376 | error_setg(errp, "Could not find working O_DIRECT alignment"); |
377 | error_append_hint(errp, "Try cache.direct=off\n"); | |
df26a350 | 378 | } |
c25f53b0 PB |
379 | } |
380 | ||
23dece19 | 381 | static void raw_parse_flags(int bdrv_flags, int *open_flags, bool has_writers) |
6a8dc042 | 382 | { |
23dece19 | 383 | bool read_write = false; |
6a8dc042 JC |
384 | assert(open_flags != NULL); |
385 | ||
386 | *open_flags |= O_BINARY; | |
387 | *open_flags &= ~O_ACCMODE; | |
23dece19 KW |
388 | |
389 | if (bdrv_flags & BDRV_O_AUTO_RDONLY) { | |
390 | read_write = has_writers; | |
391 | } else if (bdrv_flags & BDRV_O_RDWR) { | |
392 | read_write = true; | |
393 | } | |
394 | ||
395 | if (read_write) { | |
6a8dc042 JC |
396 | *open_flags |= O_RDWR; |
397 | } else { | |
398 | *open_flags |= O_RDONLY; | |
399 | } | |
400 | ||
401 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
402 | * and O_DIRECT for no caching. */ | |
403 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
404 | *open_flags |= O_DIRECT; | |
405 | } | |
6a8dc042 JC |
406 | } |
407 | ||
078896a9 HR |
408 | static void raw_parse_filename(const char *filename, QDict *options, |
409 | Error **errp) | |
410 | { | |
03c320d8 | 411 | bdrv_parse_filename_strip_prefix(filename, "file:", options); |
078896a9 HR |
412 | } |
413 | ||
c66a6157 KW |
414 | static QemuOptsList raw_runtime_opts = { |
415 | .name = "raw", | |
416 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
417 | .desc = { | |
418 | { | |
419 | .name = "filename", | |
420 | .type = QEMU_OPT_STRING, | |
421 | .help = "File name of the image", | |
422 | }, | |
0a4279d9 KW |
423 | { |
424 | .name = "aio", | |
425 | .type = QEMU_OPT_STRING, | |
426 | .help = "host AIO implementation (threads, native)", | |
427 | }, | |
16b48d5d FZ |
428 | { |
429 | .name = "locking", | |
430 | .type = QEMU_OPT_STRING, | |
431 | .help = "file locking mode (on/off/auto, default: auto)", | |
432 | }, | |
7c9e5276 PB |
433 | { |
434 | .name = "pr-manager", | |
435 | .type = QEMU_OPT_STRING, | |
436 | .help = "id of persistent reservation manager object (default: none)", | |
437 | }, | |
f357fcd8 SH |
438 | #if defined(__linux__) |
439 | { | |
440 | .name = "drop-cache", | |
441 | .type = QEMU_OPT_BOOL, | |
442 | .help = "invalidate page cache during live migration (default: on)", | |
443 | }, | |
444 | #endif | |
31be8a2a SH |
445 | { |
446 | .name = "x-check-cache-dropped", | |
447 | .type = QEMU_OPT_BOOL, | |
448 | .help = "check that page cache was dropped on live migration (default: off)" | |
449 | }, | |
c66a6157 KW |
450 | { /* end of list */ } |
451 | }, | |
452 | }; | |
453 | ||
8a2ce0bc AG |
454 | static const char *const mutable_opts[] = { "x-check-cache-dropped", NULL }; |
455 | ||
c66a6157 | 456 | static int raw_open_common(BlockDriverState *bs, QDict *options, |
230ff739 JS |
457 | int bdrv_flags, int open_flags, |
458 | bool device, Error **errp) | |
83f64091 FB |
459 | { |
460 | BDRVRawState *s = bs->opaque; | |
c66a6157 KW |
461 | QemuOpts *opts; |
462 | Error *local_err = NULL; | |
8bfea15d | 463 | const char *filename = NULL; |
7c9e5276 | 464 | const char *str; |
0a4279d9 | 465 | BlockdevAioOptions aio, aio_default; |
0e1d8f4c | 466 | int fd, ret; |
260a82e5 | 467 | struct stat st; |
244a5668 | 468 | OnOffAuto locking; |
83f64091 | 469 | |
87ea75d5 | 470 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
c66a6157 | 471 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 472 | if (local_err) { |
e428e439 | 473 | error_propagate(errp, local_err); |
c66a6157 KW |
474 | ret = -EINVAL; |
475 | goto fail; | |
476 | } | |
477 | ||
478 | filename = qemu_opt_get(opts, "filename"); | |
479 | ||
db0754df | 480 | ret = raw_normalize_devicepath(&filename, errp); |
1de1ae0a | 481 | if (ret != 0) { |
c66a6157 | 482 | goto fail; |
1de1ae0a CE |
483 | } |
484 | ||
0a4279d9 KW |
485 | aio_default = (bdrv_flags & BDRV_O_NATIVE_AIO) |
486 | ? BLOCKDEV_AIO_OPTIONS_NATIVE | |
487 | : BLOCKDEV_AIO_OPTIONS_THREADS; | |
f7abe0ec MAL |
488 | aio = qapi_enum_parse(&BlockdevAioOptions_lookup, |
489 | qemu_opt_get(opts, "aio"), | |
06c60b6c | 490 | aio_default, &local_err); |
0a4279d9 KW |
491 | if (local_err) { |
492 | error_propagate(errp, local_err); | |
493 | ret = -EINVAL; | |
494 | goto fail; | |
495 | } | |
496 | s->use_linux_aio = (aio == BLOCKDEV_AIO_OPTIONS_NATIVE); | |
497 | ||
f7abe0ec MAL |
498 | locking = qapi_enum_parse(&OnOffAuto_lookup, |
499 | qemu_opt_get(opts, "locking"), | |
06c60b6c | 500 | ON_OFF_AUTO_AUTO, &local_err); |
244a5668 FZ |
501 | if (local_err) { |
502 | error_propagate(errp, local_err); | |
503 | ret = -EINVAL; | |
504 | goto fail; | |
505 | } | |
506 | switch (locking) { | |
507 | case ON_OFF_AUTO_ON: | |
508 | s->use_lock = true; | |
2b218f5d | 509 | if (!qemu_has_ofd_lock()) { |
db0754df FZ |
510 | warn_report("File lock requested but OFD locking syscall is " |
511 | "unavailable, falling back to POSIX file locks"); | |
512 | error_printf("Due to the implementation, locks can be lost " | |
513 | "unexpectedly.\n"); | |
2b218f5d | 514 | } |
244a5668 FZ |
515 | break; |
516 | case ON_OFF_AUTO_OFF: | |
517 | s->use_lock = false; | |
518 | break; | |
519 | case ON_OFF_AUTO_AUTO: | |
2b218f5d | 520 | s->use_lock = qemu_has_ofd_lock(); |
244a5668 FZ |
521 | break; |
522 | default: | |
523 | abort(); | |
524 | } | |
525 | ||
7c9e5276 PB |
526 | str = qemu_opt_get(opts, "pr-manager"); |
527 | if (str) { | |
528 | s->pr_mgr = pr_manager_lookup(str, &local_err); | |
529 | if (local_err) { | |
530 | error_propagate(errp, local_err); | |
531 | ret = -EINVAL; | |
532 | goto fail; | |
533 | } | |
534 | } | |
535 | ||
f357fcd8 | 536 | s->drop_cache = qemu_opt_get_bool(opts, "drop-cache", true); |
31be8a2a SH |
537 | s->check_cache_dropped = qemu_opt_get_bool(opts, "x-check-cache-dropped", |
538 | false); | |
539 | ||
6a8dc042 | 540 | s->open_flags = open_flags; |
23dece19 | 541 | raw_parse_flags(bdrv_flags, &s->open_flags, false); |
83f64091 | 542 | |
90babde0 | 543 | s->fd = -1; |
40ff6d7e | 544 | fd = qemu_open(filename, s->open_flags, 0644); |
64107dc0 KW |
545 | ret = fd < 0 ? -errno : 0; |
546 | ||
64107dc0 KW |
547 | if (ret < 0) { |
548 | error_setg_errno(errp, -ret, "Could not open '%s'", filename); | |
c66a6157 | 549 | if (ret == -EROFS) { |
19cb3738 | 550 | ret = -EACCES; |
c66a6157 KW |
551 | } |
552 | goto fail; | |
19cb3738 | 553 | } |
83f64091 | 554 | s->fd = fd; |
9ef91a67 | 555 | |
244a5668 FZ |
556 | s->perm = 0; |
557 | s->shared_perm = BLK_PERM_ALL; | |
558 | ||
5c6c3a6c | 559 | #ifdef CONFIG_LINUX_AIO |
0a4279d9 | 560 | /* Currently Linux does AIO only for files opened with O_DIRECT */ |
ed6e2161 NA |
561 | if (s->use_linux_aio) { |
562 | if (!(s->open_flags & O_DIRECT)) { | |
563 | error_setg(errp, "aio=native was specified, but it requires " | |
564 | "cache.direct=on, which was not specified."); | |
565 | ret = -EINVAL; | |
566 | goto fail; | |
567 | } | |
568 | if (!aio_setup_linux_aio(bdrv_get_aio_context(bs), errp)) { | |
569 | error_prepend(errp, "Unable to use native AIO: "); | |
570 | goto fail; | |
571 | } | |
96518254 | 572 | } |
1501ecc1 | 573 | #else |
0a4279d9 | 574 | if (s->use_linux_aio) { |
d657c0c2 KW |
575 | error_setg(errp, "aio=native was specified, but is not supported " |
576 | "in this build."); | |
577 | ret = -EINVAL; | |
578 | goto fail; | |
1501ecc1 SH |
579 | } |
580 | #endif /* !defined(CONFIG_LINUX_AIO) */ | |
9ef91a67 | 581 | |
7ce21016 | 582 | s->has_discard = true; |
97a2ae34 | 583 | s->has_write_zeroes = true; |
3cad8307 RPM |
584 | if ((bs->open_flags & BDRV_O_NOCACHE) != 0) { |
585 | s->needs_alignment = true; | |
586 | } | |
260a82e5 PB |
587 | |
588 | if (fstat(s->fd, &st) < 0) { | |
01212d4e | 589 | ret = -errno; |
260a82e5 PB |
590 | error_setg_errno(errp, errno, "Could not stat file"); |
591 | goto fail; | |
592 | } | |
230ff739 JS |
593 | |
594 | if (!device) { | |
595 | if (S_ISBLK(st.st_mode)) { | |
596 | warn_report("Opening a block device as a file using the '%s' " | |
597 | "driver is deprecated", bs->drv->format_name); | |
598 | } else if (S_ISCHR(st.st_mode)) { | |
599 | warn_report("Opening a character device as a file using the '%s' " | |
600 | "driver is deprecated", bs->drv->format_name); | |
601 | } else if (!S_ISREG(st.st_mode)) { | |
602 | error_setg(errp, "A regular file was expected by the '%s' driver, " | |
603 | "but something else was given", bs->drv->format_name); | |
604 | ret = -EINVAL; | |
605 | goto fail; | |
606 | } else { | |
607 | s->discard_zeroes = true; | |
608 | s->has_fallocate = true; | |
609 | } | |
610 | } else { | |
611 | if (!(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
612 | error_setg(errp, "'%s' driver expects either " | |
613 | "a character or block device", bs->drv->format_name); | |
614 | ret = -EINVAL; | |
615 | goto fail; | |
616 | } | |
260a82e5 | 617 | } |
230ff739 | 618 | |
d0b4503e PB |
619 | if (S_ISBLK(st.st_mode)) { |
620 | #ifdef BLKDISCARDZEROES | |
621 | unsigned int arg; | |
622 | if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) { | |
623 | s->discard_zeroes = true; | |
624 | } | |
625 | #endif | |
626 | #ifdef __linux__ | |
627 | /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do | |
628 | * not rely on the contents of discarded blocks unless using O_DIRECT. | |
97a2ae34 | 629 | * Same for BLKZEROOUT. |
d0b4503e PB |
630 | */ |
631 | if (!(bs->open_flags & BDRV_O_NOCACHE)) { | |
632 | s->discard_zeroes = false; | |
97a2ae34 | 633 | s->has_write_zeroes = false; |
d0b4503e PB |
634 | } |
635 | #endif | |
636 | } | |
3cad8307 RPM |
637 | #ifdef __FreeBSD__ |
638 | if (S_ISCHR(st.st_mode)) { | |
639 | /* | |
640 | * The file is a char device (disk), which on FreeBSD isn't behind | |
641 | * a pager, so force all requests to be aligned. This is needed | |
642 | * so QEMU makes sure all IO operations on the device are aligned | |
643 | * to sector size, or else FreeBSD will reject them with EINVAL. | |
644 | */ | |
645 | s->needs_alignment = true; | |
646 | } | |
647 | #endif | |
260a82e5 | 648 | |
dce512de CH |
649 | #ifdef CONFIG_XFS |
650 | if (platform_test_xfs_fd(s->fd)) { | |
7ce21016 | 651 | s->is_xfs = true; |
dce512de CH |
652 | } |
653 | #endif | |
654 | ||
738301e1 | 655 | bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK; |
c66a6157 KW |
656 | ret = 0; |
657 | fail: | |
8bfea15d KW |
658 | if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { |
659 | unlink(filename); | |
660 | } | |
c66a6157 KW |
661 | qemu_opts_del(opts); |
662 | return ret; | |
83f64091 FB |
663 | } |
664 | ||
015a1036 HR |
665 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
666 | Error **errp) | |
90babde0 CH |
667 | { |
668 | BDRVRawState *s = bs->opaque; | |
669 | ||
670 | s->type = FTYPE_FILE; | |
230ff739 | 671 | return raw_open_common(bs, options, flags, 0, false, errp); |
90babde0 CH |
672 | } |
673 | ||
244a5668 FZ |
674 | typedef enum { |
675 | RAW_PL_PREPARE, | |
676 | RAW_PL_COMMIT, | |
677 | RAW_PL_ABORT, | |
678 | } RawPermLockOp; | |
679 | ||
680 | #define PERM_FOREACH(i) \ | |
681 | for ((i) = 0; (1ULL << (i)) <= BLK_PERM_ALL; i++) | |
682 | ||
683 | /* Lock bytes indicated by @perm_lock_bits and @shared_perm_lock_bits in the | |
684 | * file; if @unlock == true, also unlock the unneeded bytes. | |
685 | * @shared_perm_lock_bits is the mask of all permissions that are NOT shared. | |
686 | */ | |
2996ffad | 687 | static int raw_apply_lock_bytes(BDRVRawState *s, int fd, |
244a5668 FZ |
688 | uint64_t perm_lock_bits, |
689 | uint64_t shared_perm_lock_bits, | |
690 | bool unlock, Error **errp) | |
691 | { | |
692 | int ret; | |
693 | int i; | |
2996ffad FZ |
694 | uint64_t locked_perm, locked_shared_perm; |
695 | ||
696 | if (s) { | |
697 | locked_perm = s->locked_perm; | |
698 | locked_shared_perm = s->locked_shared_perm; | |
699 | } else { | |
700 | /* | |
701 | * We don't have the previous bits, just lock/unlock for each of the | |
702 | * requested bits. | |
703 | */ | |
704 | if (unlock) { | |
705 | locked_perm = BLK_PERM_ALL; | |
706 | locked_shared_perm = BLK_PERM_ALL; | |
707 | } else { | |
708 | locked_perm = 0; | |
709 | locked_shared_perm = 0; | |
710 | } | |
711 | } | |
244a5668 FZ |
712 | |
713 | PERM_FOREACH(i) { | |
714 | int off = RAW_LOCK_PERM_BASE + i; | |
2996ffad FZ |
715 | uint64_t bit = (1ULL << i); |
716 | if ((perm_lock_bits & bit) && !(locked_perm & bit)) { | |
d0a96155 | 717 | ret = qemu_lock_fd(fd, off, 1, false); |
244a5668 FZ |
718 | if (ret) { |
719 | error_setg(errp, "Failed to lock byte %d", off); | |
720 | return ret; | |
2996ffad FZ |
721 | } else if (s) { |
722 | s->locked_perm |= bit; | |
244a5668 | 723 | } |
2996ffad | 724 | } else if (unlock && (locked_perm & bit) && !(perm_lock_bits & bit)) { |
d0a96155 | 725 | ret = qemu_unlock_fd(fd, off, 1); |
244a5668 FZ |
726 | if (ret) { |
727 | error_setg(errp, "Failed to unlock byte %d", off); | |
728 | return ret; | |
2996ffad FZ |
729 | } else if (s) { |
730 | s->locked_perm &= ~bit; | |
244a5668 FZ |
731 | } |
732 | } | |
733 | } | |
734 | PERM_FOREACH(i) { | |
735 | int off = RAW_LOCK_SHARED_BASE + i; | |
2996ffad FZ |
736 | uint64_t bit = (1ULL << i); |
737 | if ((shared_perm_lock_bits & bit) && !(locked_shared_perm & bit)) { | |
d0a96155 | 738 | ret = qemu_lock_fd(fd, off, 1, false); |
244a5668 FZ |
739 | if (ret) { |
740 | error_setg(errp, "Failed to lock byte %d", off); | |
741 | return ret; | |
2996ffad FZ |
742 | } else if (s) { |
743 | s->locked_shared_perm |= bit; | |
244a5668 | 744 | } |
2996ffad FZ |
745 | } else if (unlock && (locked_shared_perm & bit) && |
746 | !(shared_perm_lock_bits & bit)) { | |
d0a96155 | 747 | ret = qemu_unlock_fd(fd, off, 1); |
244a5668 FZ |
748 | if (ret) { |
749 | error_setg(errp, "Failed to unlock byte %d", off); | |
750 | return ret; | |
2996ffad FZ |
751 | } else if (s) { |
752 | s->locked_shared_perm &= ~bit; | |
244a5668 FZ |
753 | } |
754 | } | |
755 | } | |
756 | return 0; | |
757 | } | |
758 | ||
759 | /* Check "unshared" bytes implied by @perm and ~@shared_perm in the file. */ | |
d0a96155 | 760 | static int raw_check_lock_bytes(int fd, uint64_t perm, uint64_t shared_perm, |
244a5668 FZ |
761 | Error **errp) |
762 | { | |
763 | int ret; | |
764 | int i; | |
765 | ||
766 | PERM_FOREACH(i) { | |
767 | int off = RAW_LOCK_SHARED_BASE + i; | |
768 | uint64_t p = 1ULL << i; | |
769 | if (perm & p) { | |
d0a96155 | 770 | ret = qemu_lock_fd_test(fd, off, 1, true); |
244a5668 FZ |
771 | if (ret) { |
772 | char *perm_name = bdrv_perm_names(p); | |
773 | error_setg(errp, | |
774 | "Failed to get \"%s\" lock", | |
775 | perm_name); | |
776 | g_free(perm_name); | |
244a5668 FZ |
777 | return ret; |
778 | } | |
779 | } | |
780 | } | |
781 | PERM_FOREACH(i) { | |
782 | int off = RAW_LOCK_PERM_BASE + i; | |
783 | uint64_t p = 1ULL << i; | |
784 | if (!(shared_perm & p)) { | |
d0a96155 | 785 | ret = qemu_lock_fd_test(fd, off, 1, true); |
244a5668 FZ |
786 | if (ret) { |
787 | char *perm_name = bdrv_perm_names(p); | |
788 | error_setg(errp, | |
789 | "Failed to get shared \"%s\" lock", | |
790 | perm_name); | |
791 | g_free(perm_name); | |
244a5668 FZ |
792 | return ret; |
793 | } | |
794 | } | |
795 | } | |
796 | return 0; | |
797 | } | |
798 | ||
799 | static int raw_handle_perm_lock(BlockDriverState *bs, | |
800 | RawPermLockOp op, | |
801 | uint64_t new_perm, uint64_t new_shared, | |
802 | Error **errp) | |
803 | { | |
804 | BDRVRawState *s = bs->opaque; | |
805 | int ret = 0; | |
806 | Error *local_err = NULL; | |
807 | ||
808 | if (!s->use_lock) { | |
809 | return 0; | |
810 | } | |
811 | ||
812 | if (bdrv_get_flags(bs) & BDRV_O_INACTIVE) { | |
813 | return 0; | |
814 | } | |
815 | ||
244a5668 FZ |
816 | switch (op) { |
817 | case RAW_PL_PREPARE: | |
f2e3af29 | 818 | ret = raw_apply_lock_bytes(s, s->fd, s->perm | new_perm, |
244a5668 FZ |
819 | ~s->shared_perm | ~new_shared, |
820 | false, errp); | |
821 | if (!ret) { | |
f2e3af29 | 822 | ret = raw_check_lock_bytes(s->fd, new_perm, new_shared, errp); |
244a5668 FZ |
823 | if (!ret) { |
824 | return 0; | |
825 | } | |
b857431d FZ |
826 | error_append_hint(errp, |
827 | "Is another process using the image [%s]?\n", | |
828 | bs->filename); | |
244a5668 FZ |
829 | } |
830 | op = RAW_PL_ABORT; | |
831 | /* fall through to unlock bytes. */ | |
832 | case RAW_PL_ABORT: | |
f2e3af29 | 833 | raw_apply_lock_bytes(s, s->fd, s->perm, ~s->shared_perm, |
d0a96155 | 834 | true, &local_err); |
244a5668 FZ |
835 | if (local_err) { |
836 | /* Theoretically the above call only unlocks bytes and it cannot | |
837 | * fail. Something weird happened, report it. | |
838 | */ | |
db0754df | 839 | warn_report_err(local_err); |
244a5668 FZ |
840 | } |
841 | break; | |
842 | case RAW_PL_COMMIT: | |
f2e3af29 | 843 | raw_apply_lock_bytes(s, s->fd, new_perm, ~new_shared, |
d0a96155 | 844 | true, &local_err); |
244a5668 FZ |
845 | if (local_err) { |
846 | /* Theoretically the above call only unlocks bytes and it cannot | |
847 | * fail. Something weird happened, report it. | |
848 | */ | |
db0754df | 849 | warn_report_err(local_err); |
244a5668 FZ |
850 | } |
851 | break; | |
852 | } | |
853 | return ret; | |
854 | } | |
855 | ||
5cec2870 | 856 | static int raw_reconfigure_getfd(BlockDriverState *bs, int flags, |
23dece19 | 857 | int *open_flags, uint64_t perm, bool force_dup, |
6ceabe6f | 858 | Error **errp) |
5cec2870 KW |
859 | { |
860 | BDRVRawState *s = bs->opaque; | |
861 | int fd = -1; | |
862 | int ret; | |
23dece19 KW |
863 | bool has_writers = perm & |
864 | (BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED | BLK_PERM_RESIZE); | |
5cec2870 KW |
865 | int fcntl_flags = O_APPEND | O_NONBLOCK; |
866 | #ifdef O_NOATIME | |
867 | fcntl_flags |= O_NOATIME; | |
868 | #endif | |
869 | ||
870 | *open_flags = 0; | |
871 | if (s->type == FTYPE_CD) { | |
872 | *open_flags |= O_NONBLOCK; | |
873 | } | |
874 | ||
23dece19 | 875 | raw_parse_flags(flags, open_flags, has_writers); |
5cec2870 KW |
876 | |
877 | #ifdef O_ASYNC | |
878 | /* Not all operating systems have O_ASYNC, and those that don't | |
879 | * will not let us track the state into rs->open_flags (typically | |
880 | * you achieve the same effect with an ioctl, for example I_SETSIG | |
881 | * on Solaris). But we do not use O_ASYNC, so that's fine. | |
882 | */ | |
883 | assert((s->open_flags & O_ASYNC) == 0); | |
884 | #endif | |
885 | ||
6ceabe6f KW |
886 | if (!force_dup && *open_flags == s->open_flags) { |
887 | /* We're lucky, the existing fd is fine */ | |
888 | return s->fd; | |
889 | } | |
890 | ||
5cec2870 KW |
891 | if ((*open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { |
892 | /* dup the original fd */ | |
893 | fd = qemu_dup(s->fd); | |
894 | if (fd >= 0) { | |
895 | ret = fcntl_setfl(fd, *open_flags); | |
896 | if (ret) { | |
897 | qemu_close(fd); | |
898 | fd = -1; | |
899 | } | |
900 | } | |
901 | } | |
902 | ||
903 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ | |
904 | if (fd == -1) { | |
905 | const char *normalized_filename = bs->filename; | |
906 | ret = raw_normalize_devicepath(&normalized_filename, errp); | |
907 | if (ret >= 0) { | |
908 | assert(!(*open_flags & O_CREAT)); | |
909 | fd = qemu_open(normalized_filename, *open_flags); | |
910 | if (fd == -1) { | |
911 | error_setg_errno(errp, errno, "Could not reopen file"); | |
912 | return -1; | |
913 | } | |
914 | } | |
915 | } | |
916 | ||
917 | return fd; | |
918 | } | |
919 | ||
eeb6b45d JC |
920 | static int raw_reopen_prepare(BDRVReopenState *state, |
921 | BlockReopenQueue *queue, Error **errp) | |
922 | { | |
923 | BDRVRawState *s; | |
4e6d13c9 | 924 | BDRVRawReopenState *rs; |
31be8a2a | 925 | QemuOpts *opts; |
a6aeca0c | 926 | int ret; |
df26a350 | 927 | Error *local_err = NULL; |
eeb6b45d JC |
928 | |
929 | assert(state != NULL); | |
930 | assert(state->bs != NULL); | |
931 | ||
932 | s = state->bs->opaque; | |
933 | ||
5839e53b | 934 | state->opaque = g_new0(BDRVRawReopenState, 1); |
4e6d13c9 | 935 | rs = state->opaque; |
31be8a2a SH |
936 | |
937 | /* Handle options changes */ | |
938 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); | |
939 | qemu_opts_absorb_qdict(opts, state->options, &local_err); | |
940 | if (local_err) { | |
941 | error_propagate(errp, local_err); | |
942 | ret = -EINVAL; | |
943 | goto out; | |
944 | } | |
945 | ||
f357fcd8 | 946 | rs->drop_cache = qemu_opt_get_bool_del(opts, "drop-cache", true); |
8d324575 AG |
947 | rs->check_cache_dropped = |
948 | qemu_opt_get_bool_del(opts, "x-check-cache-dropped", false); | |
949 | ||
950 | /* This driver's reopen function doesn't currently allow changing | |
951 | * other options, so let's put them back in the original QDict and | |
952 | * bdrv_reopen_prepare() will detect changes and complain. */ | |
953 | qemu_opts_to_qdict(opts, state->options); | |
eeb6b45d | 954 | |
5cec2870 | 955 | rs->fd = raw_reconfigure_getfd(state->bs, state->flags, &rs->open_flags, |
23dece19 | 956 | state->perm, true, &local_err); |
5cec2870 KW |
957 | if (local_err) { |
958 | error_propagate(errp, local_err); | |
959 | ret = -1; | |
960 | goto out; | |
eeb6b45d | 961 | } |
df26a350 KW |
962 | |
963 | /* Fail already reopen_prepare() if we can't get a working O_DIRECT | |
964 | * alignment with the new fd. */ | |
4e6d13c9 FZ |
965 | if (rs->fd != -1) { |
966 | raw_probe_alignment(state->bs, rs->fd, &local_err); | |
df26a350 | 967 | if (local_err) { |
df26a350 KW |
968 | error_propagate(errp, local_err); |
969 | ret = -EINVAL; | |
a6aeca0c KW |
970 | goto out_fd; |
971 | } | |
df26a350 KW |
972 | } |
973 | ||
e0c9cf3a | 974 | s->reopen_state = state; |
a6aeca0c KW |
975 | ret = 0; |
976 | out_fd: | |
977 | if (ret < 0) { | |
978 | qemu_close(rs->fd); | |
979 | rs->fd = -1; | |
980 | } | |
31be8a2a SH |
981 | out: |
982 | qemu_opts_del(opts); | |
eeb6b45d JC |
983 | return ret; |
984 | } | |
985 | ||
eeb6b45d JC |
986 | static void raw_reopen_commit(BDRVReopenState *state) |
987 | { | |
4e6d13c9 | 988 | BDRVRawReopenState *rs = state->opaque; |
eeb6b45d JC |
989 | BDRVRawState *s = state->bs->opaque; |
990 | ||
f357fcd8 | 991 | s->drop_cache = rs->drop_cache; |
31be8a2a | 992 | s->check_cache_dropped = rs->check_cache_dropped; |
4e6d13c9 | 993 | s->open_flags = rs->open_flags; |
eeb6b45d JC |
994 | |
995 | qemu_close(s->fd); | |
4e6d13c9 | 996 | s->fd = rs->fd; |
eeb6b45d JC |
997 | |
998 | g_free(state->opaque); | |
999 | state->opaque = NULL; | |
e0c9cf3a KW |
1000 | |
1001 | assert(s->reopen_state == state); | |
1002 | s->reopen_state = NULL; | |
eeb6b45d JC |
1003 | } |
1004 | ||
1005 | ||
1006 | static void raw_reopen_abort(BDRVReopenState *state) | |
1007 | { | |
4e6d13c9 | 1008 | BDRVRawReopenState *rs = state->opaque; |
e0c9cf3a | 1009 | BDRVRawState *s = state->bs->opaque; |
eeb6b45d JC |
1010 | |
1011 | /* nothing to do if NULL, we didn't get far enough */ | |
4e6d13c9 | 1012 | if (rs == NULL) { |
eeb6b45d JC |
1013 | return; |
1014 | } | |
1015 | ||
4e6d13c9 FZ |
1016 | if (rs->fd >= 0) { |
1017 | qemu_close(rs->fd); | |
1018 | rs->fd = -1; | |
eeb6b45d JC |
1019 | } |
1020 | g_free(state->opaque); | |
1021 | state->opaque = NULL; | |
e0c9cf3a KW |
1022 | |
1023 | assert(s->reopen_state == state); | |
1024 | s->reopen_state = NULL; | |
eeb6b45d JC |
1025 | } |
1026 | ||
48265250 | 1027 | static int hdev_get_max_transfer_length(BlockDriverState *bs, int fd) |
6f607174 FZ |
1028 | { |
1029 | #ifdef BLKSECTGET | |
48265250 EF |
1030 | int max_bytes = 0; |
1031 | short max_sectors = 0; | |
1032 | if (bs->sg && ioctl(fd, BLKSECTGET, &max_bytes) == 0) { | |
1033 | return max_bytes; | |
1034 | } else if (!bs->sg && ioctl(fd, BLKSECTGET, &max_sectors) == 0) { | |
1035 | return max_sectors << BDRV_SECTOR_BITS; | |
6f607174 FZ |
1036 | } else { |
1037 | return -errno; | |
1038 | } | |
1039 | #else | |
1040 | return -ENOSYS; | |
1041 | #endif | |
1042 | } | |
1043 | ||
9103f1ce FZ |
1044 | static int hdev_get_max_segments(const struct stat *st) |
1045 | { | |
1046 | #ifdef CONFIG_LINUX | |
1047 | char buf[32]; | |
1048 | const char *end; | |
1049 | char *sysfspath; | |
1050 | int ret; | |
1051 | int fd = -1; | |
1052 | long max_segments; | |
1053 | ||
1054 | sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/max_segments", | |
1055 | major(st->st_rdev), minor(st->st_rdev)); | |
1056 | fd = open(sysfspath, O_RDONLY); | |
1057 | if (fd == -1) { | |
1058 | ret = -errno; | |
1059 | goto out; | |
1060 | } | |
1061 | do { | |
69583490 | 1062 | ret = read(fd, buf, sizeof(buf) - 1); |
9103f1ce FZ |
1063 | } while (ret == -1 && errno == EINTR); |
1064 | if (ret < 0) { | |
1065 | ret = -errno; | |
1066 | goto out; | |
1067 | } else if (ret == 0) { | |
1068 | ret = -EIO; | |
1069 | goto out; | |
1070 | } | |
1071 | buf[ret] = 0; | |
1072 | /* The file is ended with '\n', pass 'end' to accept that. */ | |
1073 | ret = qemu_strtol(buf, &end, 10, &max_segments); | |
1074 | if (ret == 0 && end && *end == '\n') { | |
1075 | ret = max_segments; | |
1076 | } | |
1077 | ||
1078 | out: | |
fed414df FZ |
1079 | if (fd != -1) { |
1080 | close(fd); | |
1081 | } | |
9103f1ce FZ |
1082 | g_free(sysfspath); |
1083 | return ret; | |
1084 | #else | |
1085 | return -ENOTSUP; | |
1086 | #endif | |
1087 | } | |
1088 | ||
3baca891 | 1089 | static void raw_refresh_limits(BlockDriverState *bs, Error **errp) |
c25f53b0 PB |
1090 | { |
1091 | BDRVRawState *s = bs->opaque; | |
6f607174 FZ |
1092 | struct stat st; |
1093 | ||
1094 | if (!fstat(s->fd, &st)) { | |
c4c41a0a | 1095 | if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode)) { |
48265250 EF |
1096 | int ret = hdev_get_max_transfer_length(bs, s->fd); |
1097 | if (ret > 0 && ret <= BDRV_REQUEST_MAX_BYTES) { | |
1098 | bs->bl.max_transfer = pow2floor(ret); | |
6f607174 | 1099 | } |
9103f1ce FZ |
1100 | ret = hdev_get_max_segments(&st); |
1101 | if (ret > 0) { | |
1102 | bs->bl.max_transfer = MIN(bs->bl.max_transfer, | |
1103 | ret * getpagesize()); | |
1104 | } | |
6f607174 FZ |
1105 | } |
1106 | } | |
eeb6b45d | 1107 | |
df26a350 | 1108 | raw_probe_alignment(bs, s->fd, errp); |
4196d2f0 | 1109 | bs->bl.min_mem_alignment = s->buf_align; |
459b4e66 | 1110 | bs->bl.opt_mem_alignment = MAX(s->buf_align, getpagesize()); |
c25f53b0 | 1111 | } |
83f64091 | 1112 | |
1a9335e4 ET |
1113 | static int check_for_dasd(int fd) |
1114 | { | |
1115 | #ifdef BIODASDINFO2 | |
1116 | struct dasd_information2_t info = {0}; | |
1117 | ||
1118 | return ioctl(fd, BIODASDINFO2, &info); | |
1119 | #else | |
1120 | return -1; | |
1121 | #endif | |
1122 | } | |
1123 | ||
1124 | /** | |
1125 | * Try to get @bs's logical and physical block size. | |
1126 | * On success, store them in @bsz and return zero. | |
1127 | * On failure, return negative errno. | |
1128 | */ | |
1129 | static int hdev_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz) | |
1130 | { | |
1131 | BDRVRawState *s = bs->opaque; | |
1132 | int ret; | |
1133 | ||
1134 | /* If DASD, get blocksizes */ | |
1135 | if (check_for_dasd(s->fd) < 0) { | |
1136 | return -ENOTSUP; | |
1137 | } | |
1138 | ret = probe_logical_blocksize(s->fd, &bsz->log); | |
1139 | if (ret < 0) { | |
1140 | return ret; | |
1141 | } | |
1142 | return probe_physical_blocksize(s->fd, &bsz->phys); | |
1143 | } | |
1144 | ||
1145 | /** | |
1146 | * Try to get @bs's geometry: cyls, heads, sectors. | |
1147 | * On success, store them in @geo and return 0. | |
1148 | * On failure return -errno. | |
1149 | * (Allows block driver to assign default geometry values that guest sees) | |
1150 | */ | |
1151 | #ifdef __linux__ | |
1152 | static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo) | |
1153 | { | |
1154 | BDRVRawState *s = bs->opaque; | |
1155 | struct hd_geometry ioctl_geo = {0}; | |
1a9335e4 ET |
1156 | |
1157 | /* If DASD, get its geometry */ | |
1158 | if (check_for_dasd(s->fd) < 0) { | |
1159 | return -ENOTSUP; | |
1160 | } | |
1161 | if (ioctl(s->fd, HDIO_GETGEO, &ioctl_geo) < 0) { | |
1162 | return -errno; | |
1163 | } | |
1164 | /* HDIO_GETGEO may return success even though geo contains zeros | |
1165 | (e.g. certain multipath setups) */ | |
1166 | if (!ioctl_geo.heads || !ioctl_geo.sectors || !ioctl_geo.cylinders) { | |
1167 | return -ENOTSUP; | |
1168 | } | |
1169 | /* Do not return a geometry for partition */ | |
1170 | if (ioctl_geo.start != 0) { | |
1171 | return -ENOTSUP; | |
1172 | } | |
1173 | geo->heads = ioctl_geo.heads; | |
1174 | geo->sectors = ioctl_geo.sectors; | |
1a9335e4 ET |
1175 | geo->cylinders = ioctl_geo.cylinders; |
1176 | ||
1177 | return 0; | |
1178 | } | |
1179 | #else /* __linux__ */ | |
1180 | static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo) | |
1181 | { | |
1182 | return -ENOTSUP; | |
1183 | } | |
1184 | #endif | |
1185 | ||
03425671 KW |
1186 | #if defined(__linux__) |
1187 | static int handle_aiocb_ioctl(void *opaque) | |
de81a169 | 1188 | { |
03425671 | 1189 | RawPosixAIOData *aiocb = opaque; |
de81a169 PB |
1190 | int ret; |
1191 | ||
d57c44d0 | 1192 | ret = ioctl(aiocb->aio_fildes, aiocb->ioctl.cmd, aiocb->ioctl.buf); |
de81a169 PB |
1193 | if (ret == -1) { |
1194 | return -errno; | |
1195 | } | |
1196 | ||
b608c8dc | 1197 | return 0; |
de81a169 | 1198 | } |
03425671 | 1199 | #endif /* linux */ |
de81a169 | 1200 | |
06dc9bd5 | 1201 | static int handle_aiocb_flush(void *opaque) |
de81a169 | 1202 | { |
06dc9bd5 | 1203 | RawPosixAIOData *aiocb = opaque; |
e5bcf967 | 1204 | BDRVRawState *s = aiocb->bs->opaque; |
de81a169 PB |
1205 | int ret; |
1206 | ||
e5bcf967 KW |
1207 | if (s->page_cache_inconsistent) { |
1208 | return -EIO; | |
1209 | } | |
1210 | ||
de81a169 PB |
1211 | ret = qemu_fdatasync(aiocb->aio_fildes); |
1212 | if (ret == -1) { | |
e5bcf967 KW |
1213 | /* There is no clear definition of the semantics of a failing fsync(), |
1214 | * so we may have to assume the worst. The sad truth is that this | |
1215 | * assumption is correct for Linux. Some pages are now probably marked | |
1216 | * clean in the page cache even though they are inconsistent with the | |
1217 | * on-disk contents. The next fdatasync() call would succeed, but no | |
1218 | * further writeback attempt will be made. We can't get back to a state | |
1219 | * in which we know what is on disk (we would have to rewrite | |
1220 | * everything that was touched since the last fdatasync() at least), so | |
1221 | * make bdrv_flush() fail permanently. Given that the behaviour isn't | |
1222 | * really defined, I have little hope that other OSes are doing better. | |
1223 | * | |
1224 | * Obviously, this doesn't affect O_DIRECT, which bypasses the page | |
1225 | * cache. */ | |
1226 | if ((s->open_flags & O_DIRECT) == 0) { | |
1227 | s->page_cache_inconsistent = true; | |
1228 | } | |
de81a169 PB |
1229 | return -errno; |
1230 | } | |
1231 | return 0; | |
1232 | } | |
1233 | ||
1234 | #ifdef CONFIG_PREADV | |
1235 | ||
1236 | static bool preadv_present = true; | |
1237 | ||
1238 | static ssize_t | |
1239 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
1240 | { | |
1241 | return preadv(fd, iov, nr_iov, offset); | |
1242 | } | |
1243 | ||
1244 | static ssize_t | |
1245 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
1246 | { | |
1247 | return pwritev(fd, iov, nr_iov, offset); | |
1248 | } | |
1249 | ||
1250 | #else | |
1251 | ||
1252 | static bool preadv_present = false; | |
1253 | ||
1254 | static ssize_t | |
1255 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
1256 | { | |
1257 | return -ENOSYS; | |
1258 | } | |
1259 | ||
1260 | static ssize_t | |
1261 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) | |
1262 | { | |
1263 | return -ENOSYS; | |
1264 | } | |
1265 | ||
1266 | #endif | |
1267 | ||
1268 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) | |
1269 | { | |
1270 | ssize_t len; | |
1271 | ||
1272 | do { | |
1273 | if (aiocb->aio_type & QEMU_AIO_WRITE) | |
1274 | len = qemu_pwritev(aiocb->aio_fildes, | |
d57c44d0 KW |
1275 | aiocb->io.iov, |
1276 | aiocb->io.niov, | |
de81a169 PB |
1277 | aiocb->aio_offset); |
1278 | else | |
1279 | len = qemu_preadv(aiocb->aio_fildes, | |
d57c44d0 KW |
1280 | aiocb->io.iov, |
1281 | aiocb->io.niov, | |
de81a169 PB |
1282 | aiocb->aio_offset); |
1283 | } while (len == -1 && errno == EINTR); | |
1284 | ||
1285 | if (len == -1) { | |
1286 | return -errno; | |
1287 | } | |
1288 | return len; | |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * Read/writes the data to/from a given linear buffer. | |
1293 | * | |
1294 | * Returns the number of bytes handles or -errno in case of an error. Short | |
1295 | * reads are only returned if the end of the file is reached. | |
1296 | */ | |
1297 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) | |
1298 | { | |
1299 | ssize_t offset = 0; | |
1300 | ssize_t len; | |
1301 | ||
1302 | while (offset < aiocb->aio_nbytes) { | |
1303 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
1304 | len = pwrite(aiocb->aio_fildes, | |
1305 | (const char *)buf + offset, | |
1306 | aiocb->aio_nbytes - offset, | |
1307 | aiocb->aio_offset + offset); | |
1308 | } else { | |
1309 | len = pread(aiocb->aio_fildes, | |
1310 | buf + offset, | |
1311 | aiocb->aio_nbytes - offset, | |
1312 | aiocb->aio_offset + offset); | |
1313 | } | |
1314 | if (len == -1 && errno == EINTR) { | |
1315 | continue; | |
61ed73cf SH |
1316 | } else if (len == -1 && errno == EINVAL && |
1317 | (aiocb->bs->open_flags & BDRV_O_NOCACHE) && | |
1318 | !(aiocb->aio_type & QEMU_AIO_WRITE) && | |
1319 | offset > 0) { | |
1320 | /* O_DIRECT pread() may fail with EINVAL when offset is unaligned | |
1321 | * after a short read. Assume that O_DIRECT short reads only occur | |
1322 | * at EOF. Therefore this is a short read, not an I/O error. | |
1323 | */ | |
1324 | break; | |
de81a169 PB |
1325 | } else if (len == -1) { |
1326 | offset = -errno; | |
1327 | break; | |
1328 | } else if (len == 0) { | |
1329 | break; | |
1330 | } | |
1331 | offset += len; | |
1332 | } | |
1333 | ||
1334 | return offset; | |
1335 | } | |
1336 | ||
999e6b69 | 1337 | static int handle_aiocb_rw(void *opaque) |
de81a169 | 1338 | { |
999e6b69 | 1339 | RawPosixAIOData *aiocb = opaque; |
de81a169 PB |
1340 | ssize_t nbytes; |
1341 | char *buf; | |
1342 | ||
1343 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { | |
1344 | /* | |
1345 | * If there is just a single buffer, and it is properly aligned | |
1346 | * we can just use plain pread/pwrite without any problems. | |
1347 | */ | |
d57c44d0 | 1348 | if (aiocb->io.niov == 1) { |
54c7ca1b KW |
1349 | nbytes = handle_aiocb_rw_linear(aiocb, aiocb->io.iov->iov_base); |
1350 | goto out; | |
de81a169 PB |
1351 | } |
1352 | /* | |
1353 | * We have more than one iovec, and all are properly aligned. | |
1354 | * | |
1355 | * Try preadv/pwritev first and fall back to linearizing the | |
1356 | * buffer if it's not supported. | |
1357 | */ | |
1358 | if (preadv_present) { | |
1359 | nbytes = handle_aiocb_rw_vector(aiocb); | |
1360 | if (nbytes == aiocb->aio_nbytes || | |
1361 | (nbytes < 0 && nbytes != -ENOSYS)) { | |
54c7ca1b | 1362 | goto out; |
de81a169 PB |
1363 | } |
1364 | preadv_present = false; | |
1365 | } | |
1366 | ||
1367 | /* | |
1368 | * XXX(hch): short read/write. no easy way to handle the reminder | |
1369 | * using these interfaces. For now retry using plain | |
1370 | * pread/pwrite? | |
1371 | */ | |
1372 | } | |
1373 | ||
1374 | /* | |
1375 | * Ok, we have to do it the hard way, copy all segments into | |
1376 | * a single aligned buffer. | |
1377 | */ | |
50d4a858 KW |
1378 | buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes); |
1379 | if (buf == NULL) { | |
54c7ca1b KW |
1380 | nbytes = -ENOMEM; |
1381 | goto out; | |
50d4a858 KW |
1382 | } |
1383 | ||
de81a169 PB |
1384 | if (aiocb->aio_type & QEMU_AIO_WRITE) { |
1385 | char *p = buf; | |
1386 | int i; | |
1387 | ||
d57c44d0 KW |
1388 | for (i = 0; i < aiocb->io.niov; ++i) { |
1389 | memcpy(p, aiocb->io.iov[i].iov_base, aiocb->io.iov[i].iov_len); | |
1390 | p += aiocb->io.iov[i].iov_len; | |
de81a169 | 1391 | } |
8eb029c2 | 1392 | assert(p - buf == aiocb->aio_nbytes); |
de81a169 PB |
1393 | } |
1394 | ||
1395 | nbytes = handle_aiocb_rw_linear(aiocb, buf); | |
1396 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { | |
1397 | char *p = buf; | |
1398 | size_t count = aiocb->aio_nbytes, copy; | |
1399 | int i; | |
1400 | ||
d57c44d0 | 1401 | for (i = 0; i < aiocb->io.niov && count; ++i) { |
de81a169 | 1402 | copy = count; |
d57c44d0 KW |
1403 | if (copy > aiocb->io.iov[i].iov_len) { |
1404 | copy = aiocb->io.iov[i].iov_len; | |
de81a169 | 1405 | } |
d57c44d0 | 1406 | memcpy(aiocb->io.iov[i].iov_base, p, copy); |
8eb029c2 | 1407 | assert(count >= copy); |
de81a169 PB |
1408 | p += copy; |
1409 | count -= copy; | |
1410 | } | |
8eb029c2 | 1411 | assert(count == 0); |
de81a169 PB |
1412 | } |
1413 | qemu_vfree(buf); | |
1414 | ||
54c7ca1b KW |
1415 | out: |
1416 | if (nbytes == aiocb->aio_nbytes) { | |
1417 | return 0; | |
1418 | } else if (nbytes >= 0 && nbytes < aiocb->aio_nbytes) { | |
1419 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
1420 | return -EINVAL; | |
1421 | } else { | |
1422 | iov_memset(aiocb->io.iov, aiocb->io.niov, nbytes, | |
1423 | 0, aiocb->aio_nbytes - nbytes); | |
1424 | return 0; | |
1425 | } | |
1426 | } else { | |
1427 | assert(nbytes < 0); | |
1428 | return nbytes; | |
1429 | } | |
de81a169 PB |
1430 | } |
1431 | ||
8238010b | 1432 | #ifdef CONFIG_XFS |
97a2ae34 PB |
1433 | static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes) |
1434 | { | |
1435 | struct xfs_flock64 fl; | |
bcb22555 | 1436 | int err; |
97a2ae34 PB |
1437 | |
1438 | memset(&fl, 0, sizeof(fl)); | |
1439 | fl.l_whence = SEEK_SET; | |
1440 | fl.l_start = offset; | |
1441 | fl.l_len = bytes; | |
1442 | ||
1443 | if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) { | |
bcb22555 | 1444 | err = errno; |
4f7d28d7 | 1445 | trace_file_xfs_write_zeroes(strerror(errno)); |
bcb22555 | 1446 | return -err; |
97a2ae34 PB |
1447 | } |
1448 | ||
1449 | return 0; | |
1450 | } | |
1451 | ||
8238010b PB |
1452 | static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes) |
1453 | { | |
1454 | struct xfs_flock64 fl; | |
bcb22555 | 1455 | int err; |
8238010b PB |
1456 | |
1457 | memset(&fl, 0, sizeof(fl)); | |
1458 | fl.l_whence = SEEK_SET; | |
1459 | fl.l_start = offset; | |
1460 | fl.l_len = bytes; | |
1461 | ||
1462 | if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { | |
bcb22555 | 1463 | err = errno; |
4f7d28d7 | 1464 | trace_file_xfs_discard(strerror(errno)); |
bcb22555 | 1465 | return -err; |
8238010b PB |
1466 | } |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | #endif | |
1471 | ||
1486df0e DL |
1472 | static int translate_err(int err) |
1473 | { | |
1474 | if (err == -ENODEV || err == -ENOSYS || err == -EOPNOTSUPP || | |
1475 | err == -ENOTTY) { | |
1476 | err = -ENOTSUP; | |
1477 | } | |
1478 | return err; | |
1479 | } | |
1480 | ||
d50d8222 | 1481 | #ifdef CONFIG_FALLOCATE |
0b991712 DL |
1482 | static int do_fallocate(int fd, int mode, off_t offset, off_t len) |
1483 | { | |
1484 | do { | |
1485 | if (fallocate(fd, mode, offset, len) == 0) { | |
1486 | return 0; | |
1487 | } | |
1488 | } while (errno == EINTR); | |
1489 | return translate_err(-errno); | |
1490 | } | |
1491 | #endif | |
1492 | ||
37cc9f7f | 1493 | static ssize_t handle_aiocb_write_zeroes_block(RawPosixAIOData *aiocb) |
97a2ae34 | 1494 | { |
37cc9f7f | 1495 | int ret = -ENOTSUP; |
97a2ae34 PB |
1496 | BDRVRawState *s = aiocb->bs->opaque; |
1497 | ||
37cc9f7f | 1498 | if (!s->has_write_zeroes) { |
97a2ae34 PB |
1499 | return -ENOTSUP; |
1500 | } | |
1501 | ||
97a2ae34 | 1502 | #ifdef BLKZEROOUT |
738301e1 KW |
1503 | /* The BLKZEROOUT implementation in the kernel doesn't set |
1504 | * BLKDEV_ZERO_NOFALLBACK, so we can't call this if we have to avoid slow | |
1505 | * fallbacks. */ | |
1506 | if (!(aiocb->aio_type & QEMU_AIO_NO_FALLBACK)) { | |
1507 | do { | |
1508 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
1509 | if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) { | |
1510 | return 0; | |
1511 | } | |
1512 | } while (errno == EINTR); | |
37cc9f7f | 1513 | |
738301e1 KW |
1514 | ret = translate_err(-errno); |
1515 | } | |
97a2ae34 | 1516 | #endif |
97a2ae34 | 1517 | |
1486df0e | 1518 | if (ret == -ENOTSUP) { |
97a2ae34 | 1519 | s->has_write_zeroes = false; |
97a2ae34 PB |
1520 | } |
1521 | return ret; | |
1522 | } | |
1523 | ||
7154d8ae | 1524 | static int handle_aiocb_write_zeroes(void *opaque) |
37cc9f7f | 1525 | { |
7154d8ae | 1526 | RawPosixAIOData *aiocb = opaque; |
a6dcf097 | 1527 | #if defined(CONFIG_FALLOCATE) || defined(CONFIG_XFS) |
37cc9f7f | 1528 | BDRVRawState *s = aiocb->bs->opaque; |
a6dcf097 | 1529 | #endif |
70d9110b DL |
1530 | #ifdef CONFIG_FALLOCATE |
1531 | int64_t len; | |
1532 | #endif | |
37cc9f7f DL |
1533 | |
1534 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
1535 | return handle_aiocb_write_zeroes_block(aiocb); | |
1536 | } | |
1537 | ||
1538 | #ifdef CONFIG_XFS | |
1539 | if (s->is_xfs) { | |
1540 | return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
1541 | } | |
1542 | #endif | |
1543 | ||
b953f075 DL |
1544 | #ifdef CONFIG_FALLOCATE_ZERO_RANGE |
1545 | if (s->has_write_zeroes) { | |
1546 | int ret = do_fallocate(s->fd, FALLOC_FL_ZERO_RANGE, | |
1547 | aiocb->aio_offset, aiocb->aio_nbytes); | |
1548 | if (ret == 0 || ret != -ENOTSUP) { | |
1549 | return ret; | |
1550 | } | |
1551 | s->has_write_zeroes = false; | |
1552 | } | |
1553 | #endif | |
1554 | ||
1cdc3239 DL |
1555 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
1556 | if (s->has_discard && s->has_fallocate) { | |
1557 | int ret = do_fallocate(s->fd, | |
1558 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, | |
1559 | aiocb->aio_offset, aiocb->aio_nbytes); | |
1560 | if (ret == 0) { | |
1561 | ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes); | |
1562 | if (ret == 0 || ret != -ENOTSUP) { | |
1563 | return ret; | |
1564 | } | |
1565 | s->has_fallocate = false; | |
1566 | } else if (ret != -ENOTSUP) { | |
1567 | return ret; | |
1568 | } else { | |
1569 | s->has_discard = false; | |
1570 | } | |
1571 | } | |
1572 | #endif | |
1573 | ||
d50d8222 | 1574 | #ifdef CONFIG_FALLOCATE |
70d9110b DL |
1575 | /* Last resort: we are trying to extend the file with zeroed data. This |
1576 | * can be done via fallocate(fd, 0) */ | |
1577 | len = bdrv_getlength(aiocb->bs); | |
1578 | if (s->has_fallocate && len >= 0 && aiocb->aio_offset >= len) { | |
d50d8222 DL |
1579 | int ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes); |
1580 | if (ret == 0 || ret != -ENOTSUP) { | |
1581 | return ret; | |
1582 | } | |
1583 | s->has_fallocate = false; | |
1584 | } | |
1585 | #endif | |
1586 | ||
37cc9f7f DL |
1587 | return -ENOTSUP; |
1588 | } | |
1589 | ||
7154d8ae | 1590 | static int handle_aiocb_write_zeroes_unmap(void *opaque) |
34fa110e | 1591 | { |
7154d8ae | 1592 | RawPosixAIOData *aiocb = opaque; |
34fa110e KW |
1593 | BDRVRawState *s G_GNUC_UNUSED = aiocb->bs->opaque; |
1594 | int ret; | |
1595 | ||
1596 | /* First try to write zeros and unmap at the same time */ | |
1597 | ||
1598 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE | |
1599 | ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, | |
1600 | aiocb->aio_offset, aiocb->aio_nbytes); | |
1601 | if (ret != -ENOTSUP) { | |
1602 | return ret; | |
1603 | } | |
1604 | #endif | |
1605 | ||
1606 | #ifdef CONFIG_XFS | |
1607 | if (s->is_xfs) { | |
1608 | /* xfs_discard() guarantees that the discarded area reads as all-zero | |
1609 | * afterwards, so we can use it here. */ | |
1610 | return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
1611 | } | |
1612 | #endif | |
1613 | ||
1614 | /* If we couldn't manage to unmap while guaranteed that the area reads as | |
1615 | * all-zero afterwards, just write zeroes without unmapping */ | |
1616 | ret = handle_aiocb_write_zeroes(aiocb); | |
1617 | return ret; | |
1618 | } | |
1619 | ||
1efad060 FZ |
1620 | #ifndef HAVE_COPY_FILE_RANGE |
1621 | static off_t copy_file_range(int in_fd, off_t *in_off, int out_fd, | |
1622 | off_t *out_off, size_t len, unsigned int flags) | |
1623 | { | |
1624 | #ifdef __NR_copy_file_range | |
1625 | return syscall(__NR_copy_file_range, in_fd, in_off, out_fd, | |
1626 | out_off, len, flags); | |
1627 | #else | |
1628 | errno = ENOSYS; | |
1629 | return -1; | |
1630 | #endif | |
1631 | } | |
1632 | #endif | |
1633 | ||
58a209c4 | 1634 | static int handle_aiocb_copy_range(void *opaque) |
1efad060 | 1635 | { |
58a209c4 | 1636 | RawPosixAIOData *aiocb = opaque; |
1efad060 FZ |
1637 | uint64_t bytes = aiocb->aio_nbytes; |
1638 | off_t in_off = aiocb->aio_offset; | |
d57c44d0 | 1639 | off_t out_off = aiocb->copy_range.aio_offset2; |
1efad060 FZ |
1640 | |
1641 | while (bytes) { | |
1642 | ssize_t ret = copy_file_range(aiocb->aio_fildes, &in_off, | |
d57c44d0 | 1643 | aiocb->copy_range.aio_fd2, &out_off, |
1efad060 | 1644 | bytes, 0); |
ecc983a5 | 1645 | trace_file_copy_file_range(aiocb->bs, aiocb->aio_fildes, in_off, |
d57c44d0 KW |
1646 | aiocb->copy_range.aio_fd2, out_off, bytes, |
1647 | 0, ret); | |
c436e3d0 FZ |
1648 | if (ret == 0) { |
1649 | /* No progress (e.g. when beyond EOF), let the caller fall back to | |
1650 | * buffer I/O. */ | |
1651 | return -ENOSPC; | |
1efad060 FZ |
1652 | } |
1653 | if (ret < 0) { | |
c436e3d0 FZ |
1654 | switch (errno) { |
1655 | case ENOSYS: | |
1efad060 | 1656 | return -ENOTSUP; |
c436e3d0 FZ |
1657 | case EINTR: |
1658 | continue; | |
1659 | default: | |
1efad060 FZ |
1660 | return -errno; |
1661 | } | |
1662 | } | |
1efad060 FZ |
1663 | bytes -= ret; |
1664 | } | |
1665 | return 0; | |
1666 | } | |
1667 | ||
46ee0f46 | 1668 | static int handle_aiocb_discard(void *opaque) |
8238010b | 1669 | { |
46ee0f46 | 1670 | RawPosixAIOData *aiocb = opaque; |
8238010b PB |
1671 | int ret = -EOPNOTSUPP; |
1672 | BDRVRawState *s = aiocb->bs->opaque; | |
1673 | ||
7ce21016 PB |
1674 | if (!s->has_discard) { |
1675 | return -ENOTSUP; | |
8238010b PB |
1676 | } |
1677 | ||
1678 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { | |
1679 | #ifdef BLKDISCARD | |
1680 | do { | |
1681 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; | |
1682 | if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) { | |
1683 | return 0; | |
1684 | } | |
1685 | } while (errno == EINTR); | |
1686 | ||
1687 | ret = -errno; | |
1688 | #endif | |
1689 | } else { | |
1690 | #ifdef CONFIG_XFS | |
1691 | if (s->is_xfs) { | |
1692 | return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); | |
1693 | } | |
1694 | #endif | |
1695 | ||
1696 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE | |
0b991712 DL |
1697 | ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
1698 | aiocb->aio_offset, aiocb->aio_nbytes); | |
8238010b PB |
1699 | #endif |
1700 | } | |
1701 | ||
1486df0e DL |
1702 | ret = translate_err(ret); |
1703 | if (ret == -ENOTSUP) { | |
7ce21016 | 1704 | s->has_discard = false; |
8238010b PB |
1705 | } |
1706 | return ret; | |
1707 | } | |
1708 | ||
29cb4c01 | 1709 | static int handle_aiocb_truncate(void *opaque) |
93f4e2ff | 1710 | { |
29cb4c01 | 1711 | RawPosixAIOData *aiocb = opaque; |
93f4e2ff KW |
1712 | int result = 0; |
1713 | int64_t current_length = 0; | |
1714 | char *buf = NULL; | |
1715 | struct stat st; | |
1716 | int fd = aiocb->aio_fildes; | |
1717 | int64_t offset = aiocb->aio_offset; | |
d57c44d0 KW |
1718 | PreallocMode prealloc = aiocb->truncate.prealloc; |
1719 | Error **errp = aiocb->truncate.errp; | |
93f4e2ff KW |
1720 | |
1721 | if (fstat(fd, &st) < 0) { | |
1722 | result = -errno; | |
1723 | error_setg_errno(errp, -result, "Could not stat file"); | |
1724 | return result; | |
1725 | } | |
1726 | ||
1727 | current_length = st.st_size; | |
d57c44d0 | 1728 | if (current_length > offset && prealloc != PREALLOC_MODE_OFF) { |
93f4e2ff KW |
1729 | error_setg(errp, "Cannot use preallocation for shrinking files"); |
1730 | return -ENOTSUP; | |
1731 | } | |
1732 | ||
d57c44d0 | 1733 | switch (prealloc) { |
93f4e2ff KW |
1734 | #ifdef CONFIG_POSIX_FALLOCATE |
1735 | case PREALLOC_MODE_FALLOC: | |
1736 | /* | |
1737 | * Truncating before posix_fallocate() makes it about twice slower on | |
1738 | * file systems that do not support fallocate(), trying to check if a | |
1739 | * block is allocated before allocating it, so don't do that here. | |
1740 | */ | |
1741 | if (offset != current_length) { | |
1742 | result = -posix_fallocate(fd, current_length, | |
1743 | offset - current_length); | |
1744 | if (result != 0) { | |
1745 | /* posix_fallocate() doesn't set errno. */ | |
1746 | error_setg_errno(errp, -result, | |
1747 | "Could not preallocate new data"); | |
1748 | } | |
1749 | } else { | |
1750 | result = 0; | |
1751 | } | |
1752 | goto out; | |
1753 | #endif | |
1754 | case PREALLOC_MODE_FULL: | |
1755 | { | |
1756 | int64_t num = 0, left = offset - current_length; | |
1757 | off_t seek_result; | |
1758 | ||
1759 | /* | |
1760 | * Knowing the final size from the beginning could allow the file | |
1761 | * system driver to do less allocations and possibly avoid | |
1762 | * fragmentation of the file. | |
1763 | */ | |
1764 | if (ftruncate(fd, offset) != 0) { | |
1765 | result = -errno; | |
1766 | error_setg_errno(errp, -result, "Could not resize file"); | |
1767 | goto out; | |
1768 | } | |
1769 | ||
1770 | buf = g_malloc0(65536); | |
1771 | ||
1772 | seek_result = lseek(fd, current_length, SEEK_SET); | |
1773 | if (seek_result < 0) { | |
1774 | result = -errno; | |
1775 | error_setg_errno(errp, -result, | |
1776 | "Failed to seek to the old end of file"); | |
1777 | goto out; | |
1778 | } | |
1779 | ||
1780 | while (left > 0) { | |
1781 | num = MIN(left, 65536); | |
1782 | result = write(fd, buf, num); | |
1783 | if (result < 0) { | |
a1c81f4f FZ |
1784 | if (errno == EINTR) { |
1785 | continue; | |
1786 | } | |
93f4e2ff KW |
1787 | result = -errno; |
1788 | error_setg_errno(errp, -result, | |
1789 | "Could not write zeros for preallocation"); | |
1790 | goto out; | |
1791 | } | |
1792 | left -= result; | |
1793 | } | |
1794 | if (result >= 0) { | |
1795 | result = fsync(fd); | |
1796 | if (result < 0) { | |
1797 | result = -errno; | |
1798 | error_setg_errno(errp, -result, | |
1799 | "Could not flush file to disk"); | |
1800 | goto out; | |
1801 | } | |
1802 | } | |
1803 | goto out; | |
1804 | } | |
1805 | case PREALLOC_MODE_OFF: | |
1806 | if (ftruncate(fd, offset) != 0) { | |
1807 | result = -errno; | |
1808 | error_setg_errno(errp, -result, "Could not resize file"); | |
1809 | } | |
1810 | return result; | |
1811 | default: | |
1812 | result = -ENOTSUP; | |
1813 | error_setg(errp, "Unsupported preallocation mode: %s", | |
d57c44d0 | 1814 | PreallocMode_str(prealloc)); |
93f4e2ff KW |
1815 | return result; |
1816 | } | |
1817 | ||
1818 | out: | |
1819 | if (result < 0) { | |
1820 | if (ftruncate(fd, current_length) < 0) { | |
1821 | error_report("Failed to restore old file length: %s", | |
1822 | strerror(errno)); | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | g_free(buf); | |
1827 | return result; | |
1828 | } | |
1829 | ||
5d5de250 KW |
1830 | static int coroutine_fn raw_thread_pool_submit(BlockDriverState *bs, |
1831 | ThreadPoolFunc func, void *arg) | |
1832 | { | |
1833 | /* @bs can be NULL, bdrv_get_aio_context() returns the main context then */ | |
1834 | ThreadPool *pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); | |
1835 | return thread_pool_submit_co(pool, func, arg); | |
1836 | } | |
1837 | ||
9d52aa3c KW |
1838 | static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset, |
1839 | uint64_t bytes, QEMUIOVector *qiov, int type) | |
83f64091 | 1840 | { |
ce1a14dc | 1841 | BDRVRawState *s = bs->opaque; |
999e6b69 | 1842 | RawPosixAIOData acb; |
ce1a14dc | 1843 | |
19cb3738 | 1844 | if (fd_open(bs) < 0) |
2174f12b | 1845 | return -EIO; |
19cb3738 | 1846 | |
f141eafe | 1847 | /* |
3cad8307 RPM |
1848 | * Check if the underlying device requires requests to be aligned, |
1849 | * and if the request we are trying to submit is aligned or not. | |
1850 | * If this is the case tell the low-level driver that it needs | |
1851 | * to copy the buffer. | |
f141eafe | 1852 | */ |
3cad8307 | 1853 | if (s->needs_alignment) { |
c53b1c51 | 1854 | if (!bdrv_qiov_is_aligned(bs, qiov)) { |
5c6c3a6c | 1855 | type |= QEMU_AIO_MISALIGNED; |
e44bd6fc | 1856 | #ifdef CONFIG_LINUX_AIO |
0a4279d9 | 1857 | } else if (s->use_linux_aio) { |
0187f5c9 | 1858 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
9d52aa3c | 1859 | assert(qiov->size == bytes); |
0187f5c9 | 1860 | return laio_co_submit(bs, aio, s->fd, offset, qiov, type); |
e44bd6fc | 1861 | #endif |
5c6c3a6c | 1862 | } |
9ef91a67 | 1863 | } |
f141eafe | 1864 | |
999e6b69 KW |
1865 | acb = (RawPosixAIOData) { |
1866 | .bs = bs, | |
1867 | .aio_fildes = s->fd, | |
1868 | .aio_type = type, | |
1869 | .aio_offset = offset, | |
1870 | .aio_nbytes = bytes, | |
1871 | .io = { | |
1872 | .iov = qiov->iov, | |
1873 | .niov = qiov->niov, | |
1874 | }, | |
1875 | }; | |
1876 | ||
1877 | assert(qiov->size == bytes); | |
1878 | return raw_thread_pool_submit(bs, handle_aiocb_rw, &acb); | |
2174f12b KW |
1879 | } |
1880 | ||
9d52aa3c KW |
1881 | static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset, |
1882 | uint64_t bytes, QEMUIOVector *qiov, | |
1883 | int flags) | |
2174f12b | 1884 | { |
9d52aa3c | 1885 | return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_READ); |
2174f12b KW |
1886 | } |
1887 | ||
9d52aa3c KW |
1888 | static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset, |
1889 | uint64_t bytes, QEMUIOVector *qiov, | |
1890 | int flags) | |
2174f12b | 1891 | { |
9d52aa3c KW |
1892 | assert(flags == 0); |
1893 | return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_WRITE); | |
83f64091 FB |
1894 | } |
1895 | ||
1b3abdcc ML |
1896 | static void raw_aio_plug(BlockDriverState *bs) |
1897 | { | |
1898 | #ifdef CONFIG_LINUX_AIO | |
0a4279d9 KW |
1899 | BDRVRawState *s = bs->opaque; |
1900 | if (s->use_linux_aio) { | |
0187f5c9 PB |
1901 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
1902 | laio_io_plug(bs, aio); | |
1b3abdcc ML |
1903 | } |
1904 | #endif | |
1905 | } | |
1906 | ||
1907 | static void raw_aio_unplug(BlockDriverState *bs) | |
1908 | { | |
1909 | #ifdef CONFIG_LINUX_AIO | |
0a4279d9 KW |
1910 | BDRVRawState *s = bs->opaque; |
1911 | if (s->use_linux_aio) { | |
0187f5c9 PB |
1912 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
1913 | laio_io_unplug(bs, aio); | |
1b3abdcc ML |
1914 | } |
1915 | #endif | |
1916 | } | |
1917 | ||
33d70fb6 | 1918 | static int raw_co_flush_to_disk(BlockDriverState *bs) |
b2e12bc6 CH |
1919 | { |
1920 | BDRVRawState *s = bs->opaque; | |
06dc9bd5 | 1921 | RawPosixAIOData acb; |
33d70fb6 | 1922 | int ret; |
b2e12bc6 | 1923 | |
33d70fb6 KW |
1924 | ret = fd_open(bs); |
1925 | if (ret < 0) { | |
1926 | return ret; | |
1927 | } | |
b2e12bc6 | 1928 | |
06dc9bd5 KW |
1929 | acb = (RawPosixAIOData) { |
1930 | .bs = bs, | |
1931 | .aio_fildes = s->fd, | |
1932 | .aio_type = QEMU_AIO_FLUSH, | |
1933 | }; | |
1934 | ||
1935 | return raw_thread_pool_submit(bs, handle_aiocb_flush, &acb); | |
b2e12bc6 CH |
1936 | } |
1937 | ||
ed6e2161 NA |
1938 | static void raw_aio_attach_aio_context(BlockDriverState *bs, |
1939 | AioContext *new_context) | |
1940 | { | |
1941 | #ifdef CONFIG_LINUX_AIO | |
1942 | BDRVRawState *s = bs->opaque; | |
1943 | if (s->use_linux_aio) { | |
1944 | Error *local_err; | |
1945 | if (!aio_setup_linux_aio(new_context, &local_err)) { | |
1946 | error_reportf_err(local_err, "Unable to use native AIO, " | |
1947 | "falling back to thread pool: "); | |
1948 | s->use_linux_aio = false; | |
1949 | } | |
1950 | } | |
1951 | #endif | |
1952 | } | |
1953 | ||
83f64091 FB |
1954 | static void raw_close(BlockDriverState *bs) |
1955 | { | |
1956 | BDRVRawState *s = bs->opaque; | |
c2f3426c | 1957 | |
19cb3738 | 1958 | if (s->fd >= 0) { |
2e1e79da | 1959 | qemu_close(s->fd); |
19cb3738 FB |
1960 | s->fd = -1; |
1961 | } | |
83f64091 FB |
1962 | } |
1963 | ||
d0bc9e5d HR |
1964 | /** |
1965 | * Truncates the given regular file @fd to @offset and, when growing, fills the | |
1966 | * new space according to @prealloc. | |
1967 | * | |
1968 | * Returns: 0 on success, -errno on failure. | |
1969 | */ | |
93f4e2ff KW |
1970 | static int coroutine_fn |
1971 | raw_regular_truncate(BlockDriverState *bs, int fd, int64_t offset, | |
1972 | PreallocMode prealloc, Error **errp) | |
9f63b07e | 1973 | { |
29cb4c01 | 1974 | RawPosixAIOData acb; |
d0bc9e5d | 1975 | |
29cb4c01 | 1976 | acb = (RawPosixAIOData) { |
93f4e2ff KW |
1977 | .bs = bs, |
1978 | .aio_fildes = fd, | |
1979 | .aio_type = QEMU_AIO_TRUNCATE, | |
1980 | .aio_offset = offset, | |
d57c44d0 KW |
1981 | .truncate = { |
1982 | .prealloc = prealloc, | |
1983 | .errp = errp, | |
1984 | }, | |
93f4e2ff | 1985 | }; |
d0bc9e5d | 1986 | |
29cb4c01 | 1987 | return raw_thread_pool_submit(bs, handle_aiocb_truncate, &acb); |
9f63b07e HR |
1988 | } |
1989 | ||
061ca8a3 KW |
1990 | static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, |
1991 | PreallocMode prealloc, Error **errp) | |
83f64091 FB |
1992 | { |
1993 | BDRVRawState *s = bs->opaque; | |
55b949c8 | 1994 | struct stat st; |
f59adb32 | 1995 | int ret; |
55b949c8 CH |
1996 | |
1997 | if (fstat(s->fd, &st)) { | |
f59adb32 HR |
1998 | ret = -errno; |
1999 | error_setg_errno(errp, -ret, "Failed to fstat() the file"); | |
2000 | return ret; | |
55b949c8 CH |
2001 | } |
2002 | ||
2003 | if (S_ISREG(st.st_mode)) { | |
93f4e2ff | 2004 | return raw_regular_truncate(bs, s->fd, offset, prealloc, errp); |
35d72602 HR |
2005 | } |
2006 | ||
2007 | if (prealloc != PREALLOC_MODE_OFF) { | |
2008 | error_setg(errp, "Preallocation mode '%s' unsupported for this " | |
977c736f | 2009 | "non-regular file", PreallocMode_str(prealloc)); |
35d72602 HR |
2010 | return -ENOTSUP; |
2011 | } | |
2012 | ||
2013 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
f59adb32 HR |
2014 | if (offset > raw_getlength(bs)) { |
2015 | error_setg(errp, "Cannot grow device files"); | |
2016 | return -EINVAL; | |
2017 | } | |
55b949c8 | 2018 | } else { |
f59adb32 | 2019 | error_setg(errp, "Resizing this file is not supported"); |
55b949c8 CH |
2020 | return -ENOTSUP; |
2021 | } | |
2022 | ||
83f64091 FB |
2023 | return 0; |
2024 | } | |
2025 | ||
128ab2ff BS |
2026 | #ifdef __OpenBSD__ |
2027 | static int64_t raw_getlength(BlockDriverState *bs) | |
2028 | { | |
2029 | BDRVRawState *s = bs->opaque; | |
2030 | int fd = s->fd; | |
2031 | struct stat st; | |
2032 | ||
2033 | if (fstat(fd, &st)) | |
aa729704 | 2034 | return -errno; |
128ab2ff BS |
2035 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
2036 | struct disklabel dl; | |
2037 | ||
2038 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
aa729704 | 2039 | return -errno; |
128ab2ff BS |
2040 | return (uint64_t)dl.d_secsize * |
2041 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
2042 | } else | |
2043 | return st.st_size; | |
2044 | } | |
d1f6fd8d CE |
2045 | #elif defined(__NetBSD__) |
2046 | static int64_t raw_getlength(BlockDriverState *bs) | |
2047 | { | |
2048 | BDRVRawState *s = bs->opaque; | |
2049 | int fd = s->fd; | |
2050 | struct stat st; | |
2051 | ||
2052 | if (fstat(fd, &st)) | |
aa729704 | 2053 | return -errno; |
d1f6fd8d CE |
2054 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
2055 | struct dkwedge_info dkw; | |
2056 | ||
2057 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { | |
2058 | return dkw.dkw_size * 512; | |
2059 | } else { | |
2060 | struct disklabel dl; | |
2061 | ||
2062 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
aa729704 | 2063 | return -errno; |
d1f6fd8d CE |
2064 | return (uint64_t)dl.d_secsize * |
2065 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
2066 | } | |
2067 | } else | |
2068 | return st.st_size; | |
2069 | } | |
50779cc2 CH |
2070 | #elif defined(__sun__) |
2071 | static int64_t raw_getlength(BlockDriverState *bs) | |
2072 | { | |
2073 | BDRVRawState *s = bs->opaque; | |
2074 | struct dk_minfo minfo; | |
2075 | int ret; | |
aa729704 | 2076 | int64_t size; |
50779cc2 CH |
2077 | |
2078 | ret = fd_open(bs); | |
2079 | if (ret < 0) { | |
2080 | return ret; | |
2081 | } | |
2082 | ||
2083 | /* | |
2084 | * Use the DKIOCGMEDIAINFO ioctl to read the size. | |
2085 | */ | |
2086 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); | |
2087 | if (ret != -1) { | |
2088 | return minfo.dki_lbsize * minfo.dki_capacity; | |
2089 | } | |
2090 | ||
2091 | /* | |
2092 | * There are reports that lseek on some devices fails, but | |
2093 | * irc discussion said that contingency on contingency was overkill. | |
2094 | */ | |
aa729704 MA |
2095 | size = lseek(s->fd, 0, SEEK_END); |
2096 | if (size < 0) { | |
2097 | return -errno; | |
2098 | } | |
2099 | return size; | |
50779cc2 CH |
2100 | } |
2101 | #elif defined(CONFIG_BSD) | |
2102 | static int64_t raw_getlength(BlockDriverState *bs) | |
83f64091 FB |
2103 | { |
2104 | BDRVRawState *s = bs->opaque; | |
2105 | int fd = s->fd; | |
2106 | int64_t size; | |
83f64091 | 2107 | struct stat sb; |
a167ba50 | 2108 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a | 2109 | int reopened = 0; |
83f64091 | 2110 | #endif |
19cb3738 FB |
2111 | int ret; |
2112 | ||
2113 | ret = fd_open(bs); | |
2114 | if (ret < 0) | |
2115 | return ret; | |
83f64091 | 2116 | |
a167ba50 | 2117 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
2118 | again: |
2119 | #endif | |
83f64091 FB |
2120 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
2121 | #ifdef DIOCGMEDIASIZE | |
7d37435b | 2122 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) |
c5e97233 BS |
2123 | #elif defined(DIOCGPART) |
2124 | { | |
2125 | struct partinfo pi; | |
2126 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
2127 | size = pi.media_size; | |
2128 | else | |
2129 | size = 0; | |
2130 | } | |
2131 | if (size == 0) | |
83f64091 | 2132 | #endif |
83affaa6 | 2133 | #if defined(__APPLE__) && defined(__MACH__) |
728dacbd JA |
2134 | { |
2135 | uint64_t sectors = 0; | |
2136 | uint32_t sector_size = 0; | |
2137 | ||
2138 | if (ioctl(fd, DKIOCGETBLOCKCOUNT, §ors) == 0 | |
2139 | && ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) == 0) { | |
2140 | size = sectors * sector_size; | |
2141 | } else { | |
2142 | size = lseek(fd, 0LL, SEEK_END); | |
2143 | if (size < 0) { | |
2144 | return -errno; | |
2145 | } | |
2146 | } | |
2147 | } | |
83f64091 FB |
2148 | #else |
2149 | size = lseek(fd, 0LL, SEEK_END); | |
aa729704 MA |
2150 | if (size < 0) { |
2151 | return -errno; | |
2152 | } | |
9f23011a | 2153 | #endif |
a167ba50 | 2154 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
9f23011a BS |
2155 | switch(s->type) { |
2156 | case FTYPE_CD: | |
2157 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
2158 | if (size == 2048LL * (unsigned)-1) | |
2159 | size = 0; | |
2160 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 2161 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
2162 | reopened = 1; |
2163 | goto again; | |
2164 | } | |
2165 | } | |
83f64091 | 2166 | #endif |
50779cc2 | 2167 | } else { |
83f64091 | 2168 | size = lseek(fd, 0, SEEK_END); |
aa729704 MA |
2169 | if (size < 0) { |
2170 | return -errno; | |
2171 | } | |
83f64091 | 2172 | } |
83f64091 FB |
2173 | return size; |
2174 | } | |
50779cc2 CH |
2175 | #else |
2176 | static int64_t raw_getlength(BlockDriverState *bs) | |
2177 | { | |
2178 | BDRVRawState *s = bs->opaque; | |
2179 | int ret; | |
aa729704 | 2180 | int64_t size; |
50779cc2 CH |
2181 | |
2182 | ret = fd_open(bs); | |
2183 | if (ret < 0) { | |
2184 | return ret; | |
2185 | } | |
2186 | ||
aa729704 MA |
2187 | size = lseek(s->fd, 0, SEEK_END); |
2188 | if (size < 0) { | |
2189 | return -errno; | |
2190 | } | |
2191 | return size; | |
50779cc2 | 2192 | } |
128ab2ff | 2193 | #endif |
83f64091 | 2194 | |
4a1d5e1f FZ |
2195 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
2196 | { | |
2197 | struct stat st; | |
2198 | BDRVRawState *s = bs->opaque; | |
2199 | ||
2200 | if (fstat(s->fd, &st) < 0) { | |
2201 | return -errno; | |
2202 | } | |
2203 | return (int64_t)st.st_blocks * 512; | |
2204 | } | |
2205 | ||
93f4e2ff KW |
2206 | static int coroutine_fn |
2207 | raw_co_create(BlockdevCreateOptions *options, Error **errp) | |
83f64091 | 2208 | { |
927f11e1 | 2209 | BlockdevCreateOptionsFile *file_opts; |
7c20c808 | 2210 | Error *local_err = NULL; |
83f64091 | 2211 | int fd; |
d815efca | 2212 | uint64_t perm, shared; |
1e37d059 | 2213 | int result = 0; |
83f64091 | 2214 | |
927f11e1 KW |
2215 | /* Validate options and set default values */ |
2216 | assert(options->driver == BLOCKDEV_DRIVER_FILE); | |
2217 | file_opts = &options->u.file; | |
464d9f64 | 2218 | |
927f11e1 KW |
2219 | if (!file_opts->has_nocow) { |
2220 | file_opts->nocow = false; | |
2221 | } | |
2222 | if (!file_opts->has_preallocation) { | |
2223 | file_opts->preallocation = PREALLOC_MODE_OFF; | |
06247428 | 2224 | } |
83f64091 | 2225 | |
927f11e1 | 2226 | /* Create file */ |
b8cf1913 | 2227 | fd = qemu_open(file_opts->filename, O_RDWR | O_CREAT | O_BINARY, 0644); |
1e37d059 SW |
2228 | if (fd < 0) { |
2229 | result = -errno; | |
e428e439 | 2230 | error_setg_errno(errp, -result, "Could not create file"); |
06247428 HT |
2231 | goto out; |
2232 | } | |
2233 | ||
b8cf1913 HR |
2234 | /* Take permissions: We want to discard everything, so we need |
2235 | * BLK_PERM_WRITE; and truncation to the desired size requires | |
2236 | * BLK_PERM_RESIZE. | |
2237 | * On the other hand, we cannot share the RESIZE permission | |
2238 | * because we promise that after this function, the file has the | |
2239 | * size given in the options. If someone else were to resize it | |
2240 | * concurrently, we could not guarantee that. | |
2241 | * Note that after this function, we can no longer guarantee that | |
2242 | * the file is not touched by a third party, so it may be resized | |
2243 | * then. */ | |
2244 | perm = BLK_PERM_WRITE | BLK_PERM_RESIZE; | |
2245 | shared = BLK_PERM_ALL & ~BLK_PERM_RESIZE; | |
2246 | ||
2247 | /* Step one: Take locks */ | |
2996ffad | 2248 | result = raw_apply_lock_bytes(NULL, fd, perm, ~shared, false, errp); |
b8cf1913 HR |
2249 | if (result < 0) { |
2250 | goto out_close; | |
2251 | } | |
2252 | ||
2253 | /* Step two: Check that nobody else has taken conflicting locks */ | |
2254 | result = raw_check_lock_bytes(fd, perm, shared, errp); | |
2255 | if (result < 0) { | |
b857431d FZ |
2256 | error_append_hint(errp, |
2257 | "Is another process using the image [%s]?\n", | |
2258 | file_opts->filename); | |
7c20c808 | 2259 | goto out_unlock; |
b8cf1913 HR |
2260 | } |
2261 | ||
2262 | /* Clear the file by truncating it to 0 */ | |
93f4e2ff | 2263 | result = raw_regular_truncate(NULL, fd, 0, PREALLOC_MODE_OFF, errp); |
b8cf1913 | 2264 | if (result < 0) { |
7c20c808 | 2265 | goto out_unlock; |
b8cf1913 HR |
2266 | } |
2267 | ||
927f11e1 | 2268 | if (file_opts->nocow) { |
4ab15590 | 2269 | #ifdef __linux__ |
06247428 HT |
2270 | /* Set NOCOW flag to solve performance issue on fs like btrfs. |
2271 | * This is an optimisation. The FS_IOC_SETFLAGS ioctl return value | |
2272 | * will be ignored since any failure of this operation should not | |
2273 | * block the left work. | |
2274 | */ | |
2275 | int attr; | |
2276 | if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0) { | |
2277 | attr |= FS_NOCOW_FL; | |
2278 | ioctl(fd, FS_IOC_SETFLAGS, &attr); | |
4ab15590 | 2279 | } |
06247428 HT |
2280 | #endif |
2281 | } | |
2282 | ||
b8cf1913 HR |
2283 | /* Resize and potentially preallocate the file to the desired |
2284 | * final size */ | |
93f4e2ff KW |
2285 | result = raw_regular_truncate(NULL, fd, file_opts->size, |
2286 | file_opts->preallocation, errp); | |
9f63b07e | 2287 | if (result < 0) { |
7c20c808 HR |
2288 | goto out_unlock; |
2289 | } | |
2290 | ||
2291 | out_unlock: | |
2996ffad | 2292 | raw_apply_lock_bytes(NULL, fd, 0, 0, true, &local_err); |
7c20c808 HR |
2293 | if (local_err) { |
2294 | /* The above call should not fail, and if it does, that does | |
2295 | * not mean the whole creation operation has failed. So | |
2296 | * report it the user for their convenience, but do not report | |
2297 | * it to the caller. */ | |
db0754df | 2298 | warn_report_err(local_err); |
1e37d059 | 2299 | } |
06247428 | 2300 | |
5a1dad9d | 2301 | out_close: |
06247428 HT |
2302 | if (qemu_close(fd) != 0 && result == 0) { |
2303 | result = -errno; | |
2304 | error_setg_errno(errp, -result, "Could not close the new file"); | |
2305 | } | |
2306 | out: | |
1e37d059 | 2307 | return result; |
83f64091 FB |
2308 | } |
2309 | ||
927f11e1 KW |
2310 | static int coroutine_fn raw_co_create_opts(const char *filename, QemuOpts *opts, |
2311 | Error **errp) | |
2312 | { | |
2313 | BlockdevCreateOptions options; | |
2314 | int64_t total_size = 0; | |
2315 | bool nocow = false; | |
2316 | PreallocMode prealloc; | |
2317 | char *buf = NULL; | |
2318 | Error *local_err = NULL; | |
2319 | ||
2320 | /* Skip file: protocol prefix */ | |
2321 | strstart(filename, "file:", &filename); | |
2322 | ||
2323 | /* Read out options */ | |
2324 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
2325 | BDRV_SECTOR_SIZE); | |
2326 | nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false); | |
2327 | buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC); | |
2328 | prealloc = qapi_enum_parse(&PreallocMode_lookup, buf, | |
2329 | PREALLOC_MODE_OFF, &local_err); | |
2330 | g_free(buf); | |
2331 | if (local_err) { | |
2332 | error_propagate(errp, local_err); | |
2333 | return -EINVAL; | |
2334 | } | |
2335 | ||
2336 | options = (BlockdevCreateOptions) { | |
2337 | .driver = BLOCKDEV_DRIVER_FILE, | |
2338 | .u.file = { | |
2339 | .filename = (char *) filename, | |
2340 | .size = total_size, | |
2341 | .has_preallocation = true, | |
2342 | .preallocation = prealloc, | |
2343 | .has_nocow = true, | |
2344 | .nocow = nocow, | |
2345 | }, | |
2346 | }; | |
2347 | return raw_co_create(&options, errp); | |
2348 | } | |
2349 | ||
d1f06fe6 MA |
2350 | /* |
2351 | * Find allocation range in @bs around offset @start. | |
2352 | * May change underlying file descriptor's file offset. | |
2353 | * If @start is not in a hole, store @start in @data, and the | |
2354 | * beginning of the next hole in @hole, and return 0. | |
2355 | * If @start is in a non-trailing hole, store @start in @hole and the | |
2356 | * beginning of the next non-hole in @data, and return 0. | |
2357 | * If @start is in a trailing hole or beyond EOF, return -ENXIO. | |
2358 | * If we can't find out, return a negative errno other than -ENXIO. | |
2359 | */ | |
2360 | static int find_allocation(BlockDriverState *bs, off_t start, | |
2361 | off_t *data, off_t *hole) | |
4f11aa8a HR |
2362 | { |
2363 | #if defined SEEK_HOLE && defined SEEK_DATA | |
94282e71 | 2364 | BDRVRawState *s = bs->opaque; |
d1f06fe6 | 2365 | off_t offs; |
94282e71 | 2366 | |
d1f06fe6 MA |
2367 | /* |
2368 | * SEEK_DATA cases: | |
2369 | * D1. offs == start: start is in data | |
2370 | * D2. offs > start: start is in a hole, next data at offs | |
2371 | * D3. offs < 0, errno = ENXIO: either start is in a trailing hole | |
2372 | * or start is beyond EOF | |
2373 | * If the latter happens, the file has been truncated behind | |
2374 | * our back since we opened it. All bets are off then. | |
2375 | * Treating like a trailing hole is simplest. | |
2376 | * D4. offs < 0, errno != ENXIO: we learned nothing | |
2377 | */ | |
2378 | offs = lseek(s->fd, start, SEEK_DATA); | |
2379 | if (offs < 0) { | |
2380 | return -errno; /* D3 or D4 */ | |
2381 | } | |
a03083a0 JC |
2382 | |
2383 | if (offs < start) { | |
2384 | /* This is not a valid return by lseek(). We are safe to just return | |
2385 | * -EIO in this case, and we'll treat it like D4. */ | |
2386 | return -EIO; | |
2387 | } | |
d1f06fe6 MA |
2388 | |
2389 | if (offs > start) { | |
2390 | /* D2: in hole, next data at offs */ | |
2391 | *hole = start; | |
2392 | *data = offs; | |
2393 | return 0; | |
5500316d PB |
2394 | } |
2395 | ||
d1f06fe6 MA |
2396 | /* D1: in data, end not yet known */ |
2397 | ||
2398 | /* | |
2399 | * SEEK_HOLE cases: | |
2400 | * H1. offs == start: start is in a hole | |
2401 | * If this happens here, a hole has been dug behind our back | |
2402 | * since the previous lseek(). | |
2403 | * H2. offs > start: either start is in data, next hole at offs, | |
2404 | * or start is in trailing hole, EOF at offs | |
2405 | * Linux treats trailing holes like any other hole: offs == | |
2406 | * start. Solaris seeks to EOF instead: offs > start (blech). | |
2407 | * If that happens here, a hole has been dug behind our back | |
2408 | * since the previous lseek(). | |
2409 | * H3. offs < 0, errno = ENXIO: start is beyond EOF | |
2410 | * If this happens, the file has been truncated behind our | |
2411 | * back since we opened it. Treat it like a trailing hole. | |
2412 | * H4. offs < 0, errno != ENXIO: we learned nothing | |
2413 | * Pretend we know nothing at all, i.e. "forget" about D1. | |
2414 | */ | |
2415 | offs = lseek(s->fd, start, SEEK_HOLE); | |
2416 | if (offs < 0) { | |
2417 | return -errno; /* D1 and (H3 or H4) */ | |
2418 | } | |
a03083a0 JC |
2419 | |
2420 | if (offs < start) { | |
2421 | /* This is not a valid return by lseek(). We are safe to just return | |
2422 | * -EIO in this case, and we'll treat it like H4. */ | |
2423 | return -EIO; | |
2424 | } | |
d1f06fe6 MA |
2425 | |
2426 | if (offs > start) { | |
2427 | /* | |
2428 | * D1 and H2: either in data, next hole at offs, or it was in | |
2429 | * data but is now in a trailing hole. In the latter case, | |
2430 | * all bets are off. Treating it as if it there was data all | |
2431 | * the way to EOF is safe, so simply do that. | |
2432 | */ | |
4f11aa8a | 2433 | *data = start; |
d1f06fe6 MA |
2434 | *hole = offs; |
2435 | return 0; | |
5500316d | 2436 | } |
4f11aa8a | 2437 | |
d1f06fe6 MA |
2438 | /* D1 and H1 */ |
2439 | return -EBUSY; | |
5500316d | 2440 | #else |
4f11aa8a | 2441 | return -ENOTSUP; |
5500316d | 2442 | #endif |
4f11aa8a HR |
2443 | } |
2444 | ||
2445 | /* | |
a290f085 | 2446 | * Returns the allocation status of the specified offset. |
4f11aa8a | 2447 | * |
a290f085 | 2448 | * The block layer guarantees 'offset' and 'bytes' are within bounds. |
4f11aa8a | 2449 | * |
a290f085 EB |
2450 | * 'pnum' is set to the number of bytes (including and immediately following |
2451 | * the specified offset) that are known to be in the same | |
4f11aa8a HR |
2452 | * allocated/unallocated state. |
2453 | * | |
a290f085 | 2454 | * 'bytes' is the max value 'pnum' should be set to. |
4f11aa8a | 2455 | */ |
a290f085 EB |
2456 | static int coroutine_fn raw_co_block_status(BlockDriverState *bs, |
2457 | bool want_zero, | |
2458 | int64_t offset, | |
2459 | int64_t bytes, int64_t *pnum, | |
2460 | int64_t *map, | |
2461 | BlockDriverState **file) | |
2462 | { | |
2463 | off_t data = 0, hole = 0; | |
d7f62751 | 2464 | int ret; |
4f11aa8a HR |
2465 | |
2466 | ret = fd_open(bs); | |
2467 | if (ret < 0) { | |
2468 | return ret; | |
2469 | } | |
2470 | ||
a290f085 EB |
2471 | if (!want_zero) { |
2472 | *pnum = bytes; | |
2473 | *map = offset; | |
2474 | *file = bs; | |
2475 | return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; | |
e6d7ec32 | 2476 | } |
4f11aa8a | 2477 | |
a290f085 | 2478 | ret = find_allocation(bs, offset, &data, &hole); |
d1f06fe6 MA |
2479 | if (ret == -ENXIO) { |
2480 | /* Trailing hole */ | |
a290f085 | 2481 | *pnum = bytes; |
d1f06fe6 MA |
2482 | ret = BDRV_BLOCK_ZERO; |
2483 | } else if (ret < 0) { | |
2484 | /* No info available, so pretend there are no holes */ | |
a290f085 | 2485 | *pnum = bytes; |
d1f06fe6 | 2486 | ret = BDRV_BLOCK_DATA; |
a290f085 EB |
2487 | } else if (data == offset) { |
2488 | /* On a data extent, compute bytes to the end of the extent, | |
f4a769ab | 2489 | * possibly including a partial sector at EOF. */ |
a290f085 | 2490 | *pnum = MIN(bytes, hole - offset); |
d1f06fe6 | 2491 | ret = BDRV_BLOCK_DATA; |
5500316d | 2492 | } else { |
a290f085 EB |
2493 | /* On a hole, compute bytes to the beginning of the next extent. */ |
2494 | assert(hole == offset); | |
2495 | *pnum = MIN(bytes, data - offset); | |
d1f06fe6 | 2496 | ret = BDRV_BLOCK_ZERO; |
5500316d | 2497 | } |
a290f085 | 2498 | *map = offset; |
02650acb | 2499 | *file = bs; |
a290f085 | 2500 | return ret | BDRV_BLOCK_OFFSET_VALID; |
5500316d PB |
2501 | } |
2502 | ||
31be8a2a SH |
2503 | #if defined(__linux__) |
2504 | /* Verify that the file is not in the page cache */ | |
2505 | static void check_cache_dropped(BlockDriverState *bs, Error **errp) | |
2506 | { | |
2507 | const size_t window_size = 128 * 1024 * 1024; | |
2508 | BDRVRawState *s = bs->opaque; | |
2509 | void *window = NULL; | |
2510 | size_t length = 0; | |
2511 | unsigned char *vec; | |
2512 | size_t page_size; | |
2513 | off_t offset; | |
2514 | off_t end; | |
2515 | ||
2516 | /* mincore(2) page status information requires 1 byte per page */ | |
2517 | page_size = sysconf(_SC_PAGESIZE); | |
2518 | vec = g_malloc(DIV_ROUND_UP(window_size, page_size)); | |
2519 | ||
2520 | end = raw_getlength(bs); | |
2521 | ||
2522 | for (offset = 0; offset < end; offset += window_size) { | |
2523 | void *new_window; | |
2524 | size_t new_length; | |
2525 | size_t vec_end; | |
2526 | size_t i; | |
2527 | int ret; | |
2528 | ||
2529 | /* Unmap previous window if size has changed */ | |
2530 | new_length = MIN(end - offset, window_size); | |
2531 | if (new_length != length) { | |
2532 | munmap(window, length); | |
2533 | window = NULL; | |
2534 | length = 0; | |
2535 | } | |
2536 | ||
2537 | new_window = mmap(window, new_length, PROT_NONE, MAP_PRIVATE, | |
2538 | s->fd, offset); | |
2539 | if (new_window == MAP_FAILED) { | |
2540 | error_setg_errno(errp, errno, "mmap failed"); | |
2541 | break; | |
2542 | } | |
2543 | ||
2544 | window = new_window; | |
2545 | length = new_length; | |
2546 | ||
2547 | ret = mincore(window, length, vec); | |
2548 | if (ret < 0) { | |
2549 | error_setg_errno(errp, errno, "mincore failed"); | |
2550 | break; | |
2551 | } | |
2552 | ||
2553 | vec_end = DIV_ROUND_UP(length, page_size); | |
2554 | for (i = 0; i < vec_end; i++) { | |
2555 | if (vec[i] & 0x1) { | |
2556 | error_setg(errp, "page cache still in use!"); | |
2557 | break; | |
2558 | } | |
2559 | } | |
2560 | } | |
2561 | ||
2562 | if (window) { | |
2563 | munmap(window, length); | |
2564 | } | |
2565 | ||
2566 | g_free(vec); | |
2567 | } | |
2568 | #endif /* __linux__ */ | |
2569 | ||
dd577a26 SH |
2570 | static void coroutine_fn raw_co_invalidate_cache(BlockDriverState *bs, |
2571 | Error **errp) | |
2572 | { | |
2573 | BDRVRawState *s = bs->opaque; | |
2574 | int ret; | |
2575 | ||
2576 | ret = fd_open(bs); | |
2577 | if (ret < 0) { | |
2578 | error_setg_errno(errp, -ret, "The file descriptor is not open"); | |
2579 | return; | |
2580 | } | |
2581 | ||
f357fcd8 SH |
2582 | if (!s->drop_cache) { |
2583 | return; | |
2584 | } | |
2585 | ||
dd577a26 SH |
2586 | if (s->open_flags & O_DIRECT) { |
2587 | return; /* No host kernel page cache */ | |
2588 | } | |
2589 | ||
2590 | #if defined(__linux__) | |
2591 | /* This sets the scene for the next syscall... */ | |
2592 | ret = bdrv_co_flush(bs); | |
2593 | if (ret < 0) { | |
2594 | error_setg_errno(errp, -ret, "flush failed"); | |
2595 | return; | |
2596 | } | |
2597 | ||
2598 | /* Linux does not invalidate pages that are dirty, locked, or mmapped by a | |
2599 | * process. These limitations are okay because we just fsynced the file, | |
2600 | * we don't use mmap, and the file should not be in use by other processes. | |
2601 | */ | |
2602 | ret = posix_fadvise(s->fd, 0, 0, POSIX_FADV_DONTNEED); | |
2603 | if (ret != 0) { /* the return value is a positive errno */ | |
2604 | error_setg_errno(errp, ret, "fadvise failed"); | |
2605 | return; | |
2606 | } | |
31be8a2a SH |
2607 | |
2608 | if (s->check_cache_dropped) { | |
2609 | check_cache_dropped(bs, errp); | |
2610 | } | |
dd577a26 SH |
2611 | #else /* __linux__ */ |
2612 | /* Do nothing. Live migration to a remote host with cache.direct=off is | |
2613 | * unsupported on other host operating systems. Cache consistency issues | |
2614 | * may occur but no error is reported here, partly because that's the | |
2615 | * historical behavior and partly because it's hard to differentiate valid | |
2616 | * configurations that should not cause errors. | |
2617 | */ | |
2618 | #endif /* !__linux__ */ | |
2619 | } | |
2620 | ||
33d70fb6 | 2621 | static coroutine_fn int |
46ee0f46 | 2622 | raw_do_pdiscard(BlockDriverState *bs, int64_t offset, int bytes, bool blkdev) |
dce512de | 2623 | { |
dce512de | 2624 | BDRVRawState *s = bs->opaque; |
46ee0f46 KW |
2625 | RawPosixAIOData acb; |
2626 | ||
2627 | acb = (RawPosixAIOData) { | |
2628 | .bs = bs, | |
2629 | .aio_fildes = s->fd, | |
2630 | .aio_type = QEMU_AIO_DISCARD, | |
2631 | .aio_offset = offset, | |
2632 | .aio_nbytes = bytes, | |
2633 | }; | |
dce512de | 2634 | |
46ee0f46 KW |
2635 | if (blkdev) { |
2636 | acb.aio_type |= QEMU_AIO_BLKDEV; | |
2637 | } | |
2638 | ||
2639 | return raw_thread_pool_submit(bs, handle_aiocb_discard, &acb); | |
2640 | } | |
2641 | ||
2642 | static coroutine_fn int | |
2643 | raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes) | |
2644 | { | |
2645 | return raw_do_pdiscard(bs, offset, bytes, false); | |
dce512de | 2646 | } |
0e7e1989 | 2647 | |
7154d8ae KW |
2648 | static int coroutine_fn |
2649 | raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes, | |
2650 | BdrvRequestFlags flags, bool blkdev) | |
260a82e5 PB |
2651 | { |
2652 | BDRVRawState *s = bs->opaque; | |
7154d8ae KW |
2653 | RawPosixAIOData acb; |
2654 | ThreadPoolFunc *handler; | |
2655 | ||
2656 | acb = (RawPosixAIOData) { | |
2657 | .bs = bs, | |
2658 | .aio_fildes = s->fd, | |
2659 | .aio_type = QEMU_AIO_WRITE_ZEROES, | |
2660 | .aio_offset = offset, | |
2661 | .aio_nbytes = bytes, | |
2662 | }; | |
2663 | ||
2664 | if (blkdev) { | |
2665 | acb.aio_type |= QEMU_AIO_BLKDEV; | |
2666 | } | |
738301e1 KW |
2667 | if (flags & BDRV_REQ_NO_FALLBACK) { |
2668 | acb.aio_type |= QEMU_AIO_NO_FALLBACK; | |
2669 | } | |
260a82e5 | 2670 | |
34fa110e | 2671 | if (flags & BDRV_REQ_MAY_UNMAP) { |
7154d8ae KW |
2672 | acb.aio_type |= QEMU_AIO_DISCARD; |
2673 | handler = handle_aiocb_write_zeroes_unmap; | |
2674 | } else { | |
2675 | handler = handle_aiocb_write_zeroes; | |
260a82e5 | 2676 | } |
34fa110e | 2677 | |
7154d8ae KW |
2678 | return raw_thread_pool_submit(bs, handler, &acb); |
2679 | } | |
2680 | ||
2681 | static int coroutine_fn raw_co_pwrite_zeroes( | |
2682 | BlockDriverState *bs, int64_t offset, | |
2683 | int bytes, BdrvRequestFlags flags) | |
2684 | { | |
2685 | return raw_do_pwrite_zeroes(bs, offset, bytes, flags, false); | |
260a82e5 PB |
2686 | } |
2687 | ||
2688 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
2689 | { | |
2690 | BDRVRawState *s = bs->opaque; | |
2691 | ||
2692 | bdi->unallocated_blocks_are_zero = s->discard_zeroes; | |
260a82e5 PB |
2693 | return 0; |
2694 | } | |
2695 | ||
6f482f74 CL |
2696 | static QemuOptsList raw_create_opts = { |
2697 | .name = "raw-create-opts", | |
2698 | .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), | |
2699 | .desc = { | |
2700 | { | |
2701 | .name = BLOCK_OPT_SIZE, | |
2702 | .type = QEMU_OPT_SIZE, | |
2703 | .help = "Virtual disk size" | |
2704 | }, | |
4ab15590 CL |
2705 | { |
2706 | .name = BLOCK_OPT_NOCOW, | |
2707 | .type = QEMU_OPT_BOOL, | |
2708 | .help = "Turn off copy-on-write (valid only on btrfs)" | |
2709 | }, | |
06247428 HT |
2710 | { |
2711 | .name = BLOCK_OPT_PREALLOC, | |
2712 | .type = QEMU_OPT_STRING, | |
2713 | .help = "Preallocation mode (allowed values: off, falloc, full)" | |
2714 | }, | |
6f482f74 CL |
2715 | { /* end of list */ } |
2716 | } | |
0e7e1989 KW |
2717 | }; |
2718 | ||
244a5668 FZ |
2719 | static int raw_check_perm(BlockDriverState *bs, uint64_t perm, uint64_t shared, |
2720 | Error **errp) | |
2721 | { | |
6ceabe6f KW |
2722 | BDRVRawState *s = bs->opaque; |
2723 | BDRVRawReopenState *rs = NULL; | |
2724 | int open_flags; | |
2725 | int ret; | |
2726 | ||
2727 | if (s->perm_change_fd) { | |
2728 | /* | |
2729 | * In the context of reopen, this function may be called several times | |
2730 | * (directly and recursively while change permissions of the parent). | |
2731 | * This is even true for children that don't inherit from the original | |
2732 | * reopen node, so s->reopen_state is not set. | |
2733 | * | |
2734 | * Ignore all but the first call. | |
2735 | */ | |
2736 | return 0; | |
2737 | } | |
2738 | ||
2739 | if (s->reopen_state) { | |
2740 | /* We already have a new file descriptor to set permissions for */ | |
2741 | assert(s->reopen_state->perm == perm); | |
2742 | assert(s->reopen_state->shared_perm == shared); | |
2743 | rs = s->reopen_state->opaque; | |
2744 | s->perm_change_fd = rs->fd; | |
2745 | } else { | |
2746 | /* We may need a new fd if auto-read-only switches the mode */ | |
23dece19 | 2747 | ret = raw_reconfigure_getfd(bs, bs->open_flags, &open_flags, perm, |
6ceabe6f KW |
2748 | false, errp); |
2749 | if (ret < 0) { | |
2750 | return ret; | |
2751 | } else if (ret != s->fd) { | |
2752 | s->perm_change_fd = ret; | |
2753 | } | |
2754 | } | |
2755 | ||
2756 | /* Prepare permissions on old fd to avoid conflicts between old and new, | |
2757 | * but keep everything locked that new will need. */ | |
2758 | ret = raw_handle_perm_lock(bs, RAW_PL_PREPARE, perm, shared, errp); | |
2759 | if (ret < 0) { | |
2760 | goto fail; | |
2761 | } | |
2762 | ||
2763 | /* Copy locks to the new fd */ | |
2764 | if (s->perm_change_fd) { | |
2765 | ret = raw_apply_lock_bytes(NULL, s->perm_change_fd, perm, ~shared, | |
2766 | false, errp); | |
2767 | if (ret < 0) { | |
2768 | raw_handle_perm_lock(bs, RAW_PL_ABORT, 0, 0, NULL); | |
2769 | goto fail; | |
2770 | } | |
2771 | } | |
2772 | return 0; | |
2773 | ||
2774 | fail: | |
2775 | if (s->perm_change_fd && !s->reopen_state) { | |
2776 | qemu_close(s->perm_change_fd); | |
2777 | } | |
2778 | s->perm_change_fd = 0; | |
2779 | return ret; | |
244a5668 FZ |
2780 | } |
2781 | ||
2782 | static void raw_set_perm(BlockDriverState *bs, uint64_t perm, uint64_t shared) | |
2783 | { | |
2784 | BDRVRawState *s = bs->opaque; | |
6ceabe6f KW |
2785 | |
2786 | /* For reopen, we have already switched to the new fd (.bdrv_set_perm is | |
2787 | * called after .bdrv_reopen_commit) */ | |
2788 | if (s->perm_change_fd && s->fd != s->perm_change_fd) { | |
2789 | qemu_close(s->fd); | |
2790 | s->fd = s->perm_change_fd; | |
2791 | } | |
2792 | s->perm_change_fd = 0; | |
2793 | ||
244a5668 FZ |
2794 | raw_handle_perm_lock(bs, RAW_PL_COMMIT, perm, shared, NULL); |
2795 | s->perm = perm; | |
2796 | s->shared_perm = shared; | |
2797 | } | |
2798 | ||
2799 | static void raw_abort_perm_update(BlockDriverState *bs) | |
2800 | { | |
6ceabe6f KW |
2801 | BDRVRawState *s = bs->opaque; |
2802 | ||
2803 | /* For reopen, .bdrv_reopen_abort is called afterwards and will close | |
2804 | * the file descriptor. */ | |
2805 | if (s->perm_change_fd && !s->reopen_state) { | |
2806 | qemu_close(s->perm_change_fd); | |
2807 | } | |
2808 | s->perm_change_fd = 0; | |
2809 | ||
244a5668 FZ |
2810 | raw_handle_perm_lock(bs, RAW_PL_ABORT, 0, 0, NULL); |
2811 | } | |
2812 | ||
67b51fb9 VSO |
2813 | static int coroutine_fn raw_co_copy_range_from( |
2814 | BlockDriverState *bs, BdrvChild *src, uint64_t src_offset, | |
2815 | BdrvChild *dst, uint64_t dst_offset, uint64_t bytes, | |
2816 | BdrvRequestFlags read_flags, BdrvRequestFlags write_flags) | |
1efad060 | 2817 | { |
67b51fb9 VSO |
2818 | return bdrv_co_copy_range_to(src, src_offset, dst, dst_offset, bytes, |
2819 | read_flags, write_flags); | |
1efad060 FZ |
2820 | } |
2821 | ||
2822 | static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs, | |
67b51fb9 VSO |
2823 | BdrvChild *src, |
2824 | uint64_t src_offset, | |
2825 | BdrvChild *dst, | |
2826 | uint64_t dst_offset, | |
2827 | uint64_t bytes, | |
2828 | BdrvRequestFlags read_flags, | |
2829 | BdrvRequestFlags write_flags) | |
1efad060 | 2830 | { |
58a209c4 | 2831 | RawPosixAIOData acb; |
1efad060 FZ |
2832 | BDRVRawState *s = bs->opaque; |
2833 | BDRVRawState *src_s; | |
2834 | ||
2835 | assert(dst->bs == bs); | |
2836 | if (src->bs->drv->bdrv_co_copy_range_to != raw_co_copy_range_to) { | |
2837 | return -ENOTSUP; | |
2838 | } | |
2839 | ||
2840 | src_s = src->bs->opaque; | |
9f850f67 | 2841 | if (fd_open(src->bs) < 0 || fd_open(dst->bs) < 0) { |
1efad060 FZ |
2842 | return -EIO; |
2843 | } | |
58a209c4 KW |
2844 | |
2845 | acb = (RawPosixAIOData) { | |
2846 | .bs = bs, | |
2847 | .aio_type = QEMU_AIO_COPY_RANGE, | |
2848 | .aio_fildes = src_s->fd, | |
2849 | .aio_offset = src_offset, | |
2850 | .aio_nbytes = bytes, | |
2851 | .copy_range = { | |
2852 | .aio_fd2 = s->fd, | |
2853 | .aio_offset2 = dst_offset, | |
2854 | }, | |
2855 | }; | |
2856 | ||
2857 | return raw_thread_pool_submit(bs, handle_aiocb_copy_range, &acb); | |
1efad060 FZ |
2858 | } |
2859 | ||
5f535a94 | 2860 | BlockDriver bdrv_file = { |
84a12e66 CH |
2861 | .format_name = "file", |
2862 | .protocol_name = "file", | |
856ae5c3 | 2863 | .instance_size = sizeof(BDRVRawState), |
030be321 | 2864 | .bdrv_needs_filename = true, |
856ae5c3 | 2865 | .bdrv_probe = NULL, /* no probe for protocols */ |
078896a9 | 2866 | .bdrv_parse_filename = raw_parse_filename, |
66f82cee | 2867 | .bdrv_file_open = raw_open, |
eeb6b45d JC |
2868 | .bdrv_reopen_prepare = raw_reopen_prepare, |
2869 | .bdrv_reopen_commit = raw_reopen_commit, | |
2870 | .bdrv_reopen_abort = raw_reopen_abort, | |
856ae5c3 | 2871 | .bdrv_close = raw_close, |
927f11e1 | 2872 | .bdrv_co_create = raw_co_create, |
efc75e2a | 2873 | .bdrv_co_create_opts = raw_co_create_opts, |
3ac21627 | 2874 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
a290f085 | 2875 | .bdrv_co_block_status = raw_co_block_status, |
dd577a26 | 2876 | .bdrv_co_invalidate_cache = raw_co_invalidate_cache, |
2ffa76c2 | 2877 | .bdrv_co_pwrite_zeroes = raw_co_pwrite_zeroes, |
3b46e624 | 2878 | |
9d52aa3c KW |
2879 | .bdrv_co_preadv = raw_co_preadv, |
2880 | .bdrv_co_pwritev = raw_co_pwritev, | |
33d70fb6 KW |
2881 | .bdrv_co_flush_to_disk = raw_co_flush_to_disk, |
2882 | .bdrv_co_pdiscard = raw_co_pdiscard, | |
1efad060 FZ |
2883 | .bdrv_co_copy_range_from = raw_co_copy_range_from, |
2884 | .bdrv_co_copy_range_to = raw_co_copy_range_to, | |
c25f53b0 | 2885 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
2886 | .bdrv_io_plug = raw_aio_plug, |
2887 | .bdrv_io_unplug = raw_aio_unplug, | |
ed6e2161 | 2888 | .bdrv_attach_aio_context = raw_aio_attach_aio_context, |
3c529d93 | 2889 | |
061ca8a3 | 2890 | .bdrv_co_truncate = raw_co_truncate, |
83f64091 | 2891 | .bdrv_getlength = raw_getlength, |
260a82e5 | 2892 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
2893 | .bdrv_get_allocated_file_size |
2894 | = raw_get_allocated_file_size, | |
244a5668 FZ |
2895 | .bdrv_check_perm = raw_check_perm, |
2896 | .bdrv_set_perm = raw_set_perm, | |
2897 | .bdrv_abort_perm_update = raw_abort_perm_update, | |
6f482f74 | 2898 | .create_opts = &raw_create_opts, |
8a2ce0bc | 2899 | .mutable_opts = mutable_opts, |
83f64091 FB |
2900 | }; |
2901 | ||
19cb3738 FB |
2902 | /***********************************************/ |
2903 | /* host device */ | |
2904 | ||
83affaa6 | 2905 | #if defined(__APPLE__) && defined(__MACH__) |
98caa5bc JA |
2906 | static kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath, |
2907 | CFIndex maxPathSize, int flags); | |
d0855f12 | 2908 | static char *FindEjectableOpticalMedia(io_iterator_t *mediaIterator) |
19cb3738 | 2909 | { |
d0855f12 | 2910 | kern_return_t kernResult = KERN_FAILURE; |
19cb3738 FB |
2911 | mach_port_t masterPort; |
2912 | CFMutableDictionaryRef classesToMatch; | |
d0855f12 JA |
2913 | const char *matching_array[] = {kIODVDMediaClass, kIOCDMediaClass}; |
2914 | char *mediaType = NULL; | |
19cb3738 FB |
2915 | |
2916 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
2917 | if ( KERN_SUCCESS != kernResult ) { | |
2918 | printf( "IOMasterPort returned %d\n", kernResult ); | |
2919 | } | |
3b46e624 | 2920 | |
d0855f12 JA |
2921 | int index; |
2922 | for (index = 0; index < ARRAY_SIZE(matching_array); index++) { | |
2923 | classesToMatch = IOServiceMatching(matching_array[index]); | |
2924 | if (classesToMatch == NULL) { | |
2925 | error_report("IOServiceMatching returned NULL for %s", | |
2926 | matching_array[index]); | |
2927 | continue; | |
2928 | } | |
2929 | CFDictionarySetValue(classesToMatch, CFSTR(kIOMediaEjectableKey), | |
2930 | kCFBooleanTrue); | |
2931 | kernResult = IOServiceGetMatchingServices(masterPort, classesToMatch, | |
2932 | mediaIterator); | |
2933 | if (kernResult != KERN_SUCCESS) { | |
2934 | error_report("Note: IOServiceGetMatchingServices returned %d", | |
2935 | kernResult); | |
2936 | continue; | |
2937 | } | |
3b46e624 | 2938 | |
d0855f12 JA |
2939 | /* If a match was found, leave the loop */ |
2940 | if (*mediaIterator != 0) { | |
4f7d28d7 | 2941 | trace_file_FindEjectableOpticalMedia(matching_array[index]); |
d0855f12 JA |
2942 | mediaType = g_strdup(matching_array[index]); |
2943 | break; | |
2944 | } | |
2945 | } | |
2946 | return mediaType; | |
19cb3738 FB |
2947 | } |
2948 | ||
98caa5bc JA |
2949 | kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath, |
2950 | CFIndex maxPathSize, int flags) | |
19cb3738 FB |
2951 | { |
2952 | io_object_t nextMedia; | |
2953 | kern_return_t kernResult = KERN_FAILURE; | |
2954 | *bsdPath = '\0'; | |
2955 | nextMedia = IOIteratorNext( mediaIterator ); | |
2956 | if ( nextMedia ) | |
2957 | { | |
2958 | CFTypeRef bsdPathAsCFString; | |
2959 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
2960 | if ( bsdPathAsCFString ) { | |
2961 | size_t devPathLength; | |
2962 | strcpy( bsdPath, _PATH_DEV ); | |
98caa5bc JA |
2963 | if (flags & BDRV_O_NOCACHE) { |
2964 | strcat(bsdPath, "r"); | |
2965 | } | |
19cb3738 FB |
2966 | devPathLength = strlen( bsdPath ); |
2967 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
2968 | kernResult = KERN_SUCCESS; | |
2969 | } | |
2970 | CFRelease( bsdPathAsCFString ); | |
2971 | } | |
2972 | IOObjectRelease( nextMedia ); | |
2973 | } | |
3b46e624 | 2974 | |
19cb3738 FB |
2975 | return kernResult; |
2976 | } | |
2977 | ||
d0855f12 JA |
2978 | /* Sets up a real cdrom for use in QEMU */ |
2979 | static bool setup_cdrom(char *bsd_path, Error **errp) | |
2980 | { | |
2981 | int index, num_of_test_partitions = 2, fd; | |
2982 | char test_partition[MAXPATHLEN]; | |
2983 | bool partition_found = false; | |
2984 | ||
2985 | /* look for a working partition */ | |
2986 | for (index = 0; index < num_of_test_partitions; index++) { | |
2987 | snprintf(test_partition, sizeof(test_partition), "%ss%d", bsd_path, | |
2988 | index); | |
2989 | fd = qemu_open(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE); | |
2990 | if (fd >= 0) { | |
2991 | partition_found = true; | |
2992 | qemu_close(fd); | |
2993 | break; | |
2994 | } | |
2995 | } | |
2996 | ||
2997 | /* if a working partition on the device was not found */ | |
2998 | if (partition_found == false) { | |
2999 | error_setg(errp, "Failed to find a working partition on disc"); | |
3000 | } else { | |
4f7d28d7 | 3001 | trace_file_setup_cdrom(test_partition); |
d0855f12 JA |
3002 | pstrcpy(bsd_path, MAXPATHLEN, test_partition); |
3003 | } | |
3004 | return partition_found; | |
3005 | } | |
3006 | ||
3007 | /* Prints directions on mounting and unmounting a device */ | |
3008 | static void print_unmounting_directions(const char *file_name) | |
3009 | { | |
3010 | error_report("If device %s is mounted on the desktop, unmount" | |
3011 | " it first before using it in QEMU", file_name); | |
3012 | error_report("Command to unmount device: diskutil unmountDisk %s", | |
3013 | file_name); | |
3014 | error_report("Command to mount device: diskutil mountDisk %s", file_name); | |
3015 | } | |
3016 | ||
3017 | #endif /* defined(__APPLE__) && defined(__MACH__) */ | |
19cb3738 | 3018 | |
508c7cb3 CH |
3019 | static int hdev_probe_device(const char *filename) |
3020 | { | |
3021 | struct stat st; | |
3022 | ||
3023 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
3024 | if (strstart(filename, "/dev/cdrom", NULL)) | |
3025 | return 50; | |
3026 | ||
3027 | if (stat(filename, &st) >= 0 && | |
3028 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
3029 | return 100; | |
3030 | } | |
3031 | ||
3032 | return 0; | |
3033 | } | |
3034 | ||
da888d37 SH |
3035 | static int check_hdev_writable(BDRVRawState *s) |
3036 | { | |
3037 | #if defined(BLKROGET) | |
3038 | /* Linux block devices can be configured "read-only" using blockdev(8). | |
3039 | * This is independent of device node permissions and therefore open(2) | |
3040 | * with O_RDWR succeeds. Actual writes fail with EPERM. | |
3041 | * | |
3042 | * bdrv_open() is supposed to fail if the disk is read-only. Explicitly | |
3043 | * check for read-only block devices so that Linux block devices behave | |
3044 | * properly. | |
3045 | */ | |
3046 | struct stat st; | |
3047 | int readonly = 0; | |
3048 | ||
3049 | if (fstat(s->fd, &st)) { | |
3050 | return -errno; | |
3051 | } | |
3052 | ||
3053 | if (!S_ISBLK(st.st_mode)) { | |
3054 | return 0; | |
3055 | } | |
3056 | ||
3057 | if (ioctl(s->fd, BLKROGET, &readonly) < 0) { | |
3058 | return -errno; | |
3059 | } | |
3060 | ||
3061 | if (readonly) { | |
3062 | return -EACCES; | |
3063 | } | |
3064 | #endif /* defined(BLKROGET) */ | |
3065 | return 0; | |
3066 | } | |
3067 | ||
7af803d4 HR |
3068 | static void hdev_parse_filename(const char *filename, QDict *options, |
3069 | Error **errp) | |
3070 | { | |
03c320d8 | 3071 | bdrv_parse_filename_strip_prefix(filename, "host_device:", options); |
7af803d4 HR |
3072 | } |
3073 | ||
3307ed7b DA |
3074 | static bool hdev_is_sg(BlockDriverState *bs) |
3075 | { | |
3076 | ||
3077 | #if defined(__linux__) | |
3078 | ||
0d4377b3 | 3079 | BDRVRawState *s = bs->opaque; |
3307ed7b DA |
3080 | struct stat st; |
3081 | struct sg_scsi_id scsiid; | |
3082 | int sg_version; | |
0d4377b3 KW |
3083 | int ret; |
3084 | ||
3085 | if (stat(bs->filename, &st) < 0 || !S_ISCHR(st.st_mode)) { | |
3086 | return false; | |
3087 | } | |
3307ed7b | 3088 | |
0d4377b3 KW |
3089 | ret = ioctl(s->fd, SG_GET_VERSION_NUM, &sg_version); |
3090 | if (ret < 0) { | |
3091 | return false; | |
3092 | } | |
3093 | ||
3094 | ret = ioctl(s->fd, SG_GET_SCSI_ID, &scsiid); | |
3095 | if (ret >= 0) { | |
4f7d28d7 | 3096 | trace_file_hdev_is_sg(scsiid.scsi_type, sg_version); |
3307ed7b DA |
3097 | return true; |
3098 | } | |
3099 | ||
3100 | #endif | |
3101 | ||
3102 | return false; | |
3103 | } | |
3104 | ||
015a1036 HR |
3105 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
3106 | Error **errp) | |
19cb3738 FB |
3107 | { |
3108 | BDRVRawState *s = bs->opaque; | |
e428e439 | 3109 | Error *local_err = NULL; |
da888d37 | 3110 | int ret; |
a76bab49 | 3111 | |
83affaa6 | 3112 | #if defined(__APPLE__) && defined(__MACH__) |
129c7d1c MA |
3113 | /* |
3114 | * Caution: while qdict_get_str() is fine, getting non-string types | |
3115 | * would require more care. When @options come from -blockdev or | |
3116 | * blockdev_add, its members are typed according to the QAPI | |
3117 | * schema, but when they come from -drive, they're all QString. | |
3118 | */ | |
3307ed7b | 3119 | const char *filename = qdict_get_str(options, "filename"); |
d0855f12 JA |
3120 | char bsd_path[MAXPATHLEN] = ""; |
3121 | bool error_occurred = false; | |
3122 | ||
3123 | /* If using a real cdrom */ | |
3124 | if (strcmp(filename, "/dev/cdrom") == 0) { | |
3125 | char *mediaType = NULL; | |
3126 | kern_return_t ret_val; | |
3127 | io_iterator_t mediaIterator = 0; | |
3128 | ||
3129 | mediaType = FindEjectableOpticalMedia(&mediaIterator); | |
3130 | if (mediaType == NULL) { | |
3131 | error_setg(errp, "Please make sure your CD/DVD is in the optical" | |
3132 | " drive"); | |
3133 | error_occurred = true; | |
3134 | goto hdev_open_Mac_error; | |
3135 | } | |
3307ed7b | 3136 | |
d0855f12 JA |
3137 | ret_val = GetBSDPath(mediaIterator, bsd_path, sizeof(bsd_path), flags); |
3138 | if (ret_val != KERN_SUCCESS) { | |
3139 | error_setg(errp, "Could not get BSD path for optical drive"); | |
3140 | error_occurred = true; | |
3141 | goto hdev_open_Mac_error; | |
3142 | } | |
3143 | ||
3144 | /* If a real optical drive was not found */ | |
3145 | if (bsd_path[0] == '\0') { | |
3146 | error_setg(errp, "Failed to obtain bsd path for optical drive"); | |
3147 | error_occurred = true; | |
3148 | goto hdev_open_Mac_error; | |
3149 | } | |
3150 | ||
3151 | /* If using a cdrom disc and finding a partition on the disc failed */ | |
3152 | if (strncmp(mediaType, kIOCDMediaClass, 9) == 0 && | |
3153 | setup_cdrom(bsd_path, errp) == false) { | |
3154 | print_unmounting_directions(bsd_path); | |
3155 | error_occurred = true; | |
3156 | goto hdev_open_Mac_error; | |
19cb3738 | 3157 | } |
3b46e624 | 3158 | |
46f5ac20 | 3159 | qdict_put_str(options, "filename", bsd_path); |
d0855f12 JA |
3160 | |
3161 | hdev_open_Mac_error: | |
3162 | g_free(mediaType); | |
3163 | if (mediaIterator) { | |
3164 | IOObjectRelease(mediaIterator); | |
3165 | } | |
3166 | if (error_occurred) { | |
3167 | return -ENOENT; | |
3168 | } | |
19cb3738 | 3169 | } |
d0855f12 | 3170 | #endif /* defined(__APPLE__) && defined(__MACH__) */ |
19cb3738 FB |
3171 | |
3172 | s->type = FTYPE_FILE; | |
90babde0 | 3173 | |
230ff739 | 3174 | ret = raw_open_common(bs, options, flags, 0, true, &local_err); |
da888d37 | 3175 | if (ret < 0) { |
621ff94d | 3176 | error_propagate(errp, local_err); |
d0855f12 JA |
3177 | #if defined(__APPLE__) && defined(__MACH__) |
3178 | if (*bsd_path) { | |
3179 | filename = bsd_path; | |
3180 | } | |
3181 | /* if a physical device experienced an error while being opened */ | |
3182 | if (strncmp(filename, "/dev/", 5) == 0) { | |
3183 | print_unmounting_directions(filename); | |
3184 | } | |
3185 | #endif /* defined(__APPLE__) && defined(__MACH__) */ | |
da888d37 SH |
3186 | return ret; |
3187 | } | |
3188 | ||
3307ed7b DA |
3189 | /* Since this does ioctl the device must be already opened */ |
3190 | bs->sg = hdev_is_sg(bs); | |
3191 | ||
da888d37 SH |
3192 | if (flags & BDRV_O_RDWR) { |
3193 | ret = check_hdev_writable(s); | |
3194 | if (ret < 0) { | |
3195 | raw_close(bs); | |
e428e439 | 3196 | error_setg_errno(errp, -ret, "The device is not writable"); |
da888d37 SH |
3197 | return ret; |
3198 | } | |
3199 | } | |
3200 | ||
3201 | return ret; | |
19cb3738 FB |
3202 | } |
3203 | ||
03ff3ca3 | 3204 | #if defined(__linux__) |
2f3a7ab3 KW |
3205 | static int coroutine_fn |
3206 | hdev_co_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
221f715d | 3207 | { |
f141eafe | 3208 | BDRVRawState *s = bs->opaque; |
03425671 | 3209 | RawPosixAIOData acb; |
2f3a7ab3 | 3210 | int ret; |
221f715d | 3211 | |
2f3a7ab3 KW |
3212 | ret = fd_open(bs); |
3213 | if (ret < 0) { | |
3214 | return ret; | |
3215 | } | |
c208e8c2 | 3216 | |
7c9e5276 PB |
3217 | if (req == SG_IO && s->pr_mgr) { |
3218 | struct sg_io_hdr *io_hdr = buf; | |
3219 | if (io_hdr->cmdp[0] == PERSISTENT_RESERVE_OUT || | |
3220 | io_hdr->cmdp[0] == PERSISTENT_RESERVE_IN) { | |
3221 | return pr_manager_execute(s->pr_mgr, bdrv_get_aio_context(bs), | |
2f3a7ab3 | 3222 | s->fd, io_hdr); |
7c9e5276 PB |
3223 | } |
3224 | } | |
3225 | ||
03425671 KW |
3226 | acb = (RawPosixAIOData) { |
3227 | .bs = bs, | |
3228 | .aio_type = QEMU_AIO_IOCTL, | |
3229 | .aio_fildes = s->fd, | |
3230 | .aio_offset = 0, | |
3231 | .ioctl = { | |
3232 | .buf = buf, | |
3233 | .cmd = req, | |
3234 | }, | |
3235 | }; | |
3236 | ||
3237 | return raw_thread_pool_submit(bs, handle_aiocb_ioctl, &acb); | |
221f715d | 3238 | } |
f709623b | 3239 | #endif /* linux */ |
221f715d | 3240 | |
9f23011a BS |
3241 | static int fd_open(BlockDriverState *bs) |
3242 | { | |
3243 | BDRVRawState *s = bs->opaque; | |
3244 | ||
3245 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
3246 | if (s->fd >= 0) | |
3247 | return 0; | |
3248 | return -EIO; | |
3249 | } | |
04eeb8b6 | 3250 | |
33d70fb6 KW |
3251 | static coroutine_fn int |
3252 | hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes) | |
c36dd8a0 | 3253 | { |
33d70fb6 | 3254 | int ret; |
c36dd8a0 | 3255 | |
33d70fb6 KW |
3256 | ret = fd_open(bs); |
3257 | if (ret < 0) { | |
3258 | return ret; | |
c36dd8a0 | 3259 | } |
46ee0f46 | 3260 | return raw_do_pdiscard(bs, offset, bytes, true); |
c36dd8a0 AF |
3261 | } |
3262 | ||
2ffa76c2 | 3263 | static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs, |
f5a5ca79 | 3264 | int64_t offset, int bytes, BdrvRequestFlags flags) |
d0b4503e | 3265 | { |
d0b4503e PB |
3266 | int rc; |
3267 | ||
3268 | rc = fd_open(bs); | |
3269 | if (rc < 0) { | |
3270 | return rc; | |
3271 | } | |
34fa110e | 3272 | |
7154d8ae | 3273 | return raw_do_pwrite_zeroes(bs, offset, bytes, flags, true); |
d0b4503e PB |
3274 | } |
3275 | ||
efc75e2a SH |
3276 | static int coroutine_fn hdev_co_create_opts(const char *filename, QemuOpts *opts, |
3277 | Error **errp) | |
93c65b47 AL |
3278 | { |
3279 | int fd; | |
3280 | int ret = 0; | |
3281 | struct stat stat_buf; | |
0e7e1989 | 3282 | int64_t total_size = 0; |
cc28c6aa HR |
3283 | bool has_prefix; |
3284 | ||
f709623b HR |
3285 | /* This function is used by both protocol block drivers and therefore either |
3286 | * of these prefixes may be given. | |
cc28c6aa HR |
3287 | * The return value has to be stored somewhere, otherwise this is an error |
3288 | * due to -Werror=unused-value. */ | |
3289 | has_prefix = | |
3290 | strstart(filename, "host_device:", &filename) || | |
f709623b | 3291 | strstart(filename, "host_cdrom:" , &filename); |
cc28c6aa HR |
3292 | |
3293 | (void)has_prefix; | |
93c65b47 | 3294 | |
db0754df | 3295 | ret = raw_normalize_devicepath(&filename, errp); |
bdd03cdf | 3296 | if (ret < 0) { |
bdd03cdf HR |
3297 | return ret; |
3298 | } | |
3299 | ||
0e7e1989 | 3300 | /* Read out options */ |
180e9526 HT |
3301 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
3302 | BDRV_SECTOR_SIZE); | |
93c65b47 | 3303 | |
6165f4d8 | 3304 | fd = qemu_open(filename, O_WRONLY | O_BINARY); |
e428e439 HR |
3305 | if (fd < 0) { |
3306 | ret = -errno; | |
3307 | error_setg_errno(errp, -ret, "Could not open device"); | |
3308 | return ret; | |
3309 | } | |
93c65b47 | 3310 | |
e428e439 | 3311 | if (fstat(fd, &stat_buf) < 0) { |
57e69b7d | 3312 | ret = -errno; |
e428e439 HR |
3313 | error_setg_errno(errp, -ret, "Could not stat device"); |
3314 | } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) { | |
3315 | error_setg(errp, | |
3316 | "The given file is neither a block nor a character device"); | |
57e69b7d | 3317 | ret = -ENODEV; |
180e9526 | 3318 | } else if (lseek(fd, 0, SEEK_END) < total_size) { |
e428e439 | 3319 | error_setg(errp, "Device is too small"); |
93c65b47 | 3320 | ret = -ENOSPC; |
e428e439 | 3321 | } |
93c65b47 | 3322 | |
97ec9117 FZ |
3323 | if (!ret && total_size) { |
3324 | uint8_t buf[BDRV_SECTOR_SIZE] = { 0 }; | |
3325 | int64_t zero_size = MIN(BDRV_SECTOR_SIZE, total_size); | |
3326 | if (lseek(fd, 0, SEEK_SET) == -1) { | |
3327 | ret = -errno; | |
3328 | } else { | |
3329 | ret = qemu_write_full(fd, buf, zero_size); | |
3330 | ret = ret == zero_size ? 0 : -errno; | |
3331 | } | |
3332 | } | |
2e1e79da | 3333 | qemu_close(fd); |
93c65b47 AL |
3334 | return ret; |
3335 | } | |
3336 | ||
5efa9d5a | 3337 | static BlockDriver bdrv_host_device = { |
0b4ce02e | 3338 | .format_name = "host_device", |
84a12e66 | 3339 | .protocol_name = "host_device", |
0b4ce02e | 3340 | .instance_size = sizeof(BDRVRawState), |
030be321 | 3341 | .bdrv_needs_filename = true, |
0b4ce02e | 3342 | .bdrv_probe_device = hdev_probe_device, |
7af803d4 | 3343 | .bdrv_parse_filename = hdev_parse_filename, |
66f82cee | 3344 | .bdrv_file_open = hdev_open, |
0b4ce02e | 3345 | .bdrv_close = raw_close, |
1bc6b705 JC |
3346 | .bdrv_reopen_prepare = raw_reopen_prepare, |
3347 | .bdrv_reopen_commit = raw_reopen_commit, | |
3348 | .bdrv_reopen_abort = raw_reopen_abort, | |
efc75e2a | 3349 | .bdrv_co_create_opts = hdev_co_create_opts, |
6f482f74 | 3350 | .create_opts = &raw_create_opts, |
8a2ce0bc | 3351 | .mutable_opts = mutable_opts, |
dd577a26 | 3352 | .bdrv_co_invalidate_cache = raw_co_invalidate_cache, |
2ffa76c2 | 3353 | .bdrv_co_pwrite_zeroes = hdev_co_pwrite_zeroes, |
3b46e624 | 3354 | |
9d52aa3c KW |
3355 | .bdrv_co_preadv = raw_co_preadv, |
3356 | .bdrv_co_pwritev = raw_co_pwritev, | |
33d70fb6 KW |
3357 | .bdrv_co_flush_to_disk = raw_co_flush_to_disk, |
3358 | .bdrv_co_pdiscard = hdev_co_pdiscard, | |
1efad060 FZ |
3359 | .bdrv_co_copy_range_from = raw_co_copy_range_from, |
3360 | .bdrv_co_copy_range_to = raw_co_copy_range_to, | |
c25f53b0 | 3361 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
3362 | .bdrv_io_plug = raw_aio_plug, |
3363 | .bdrv_io_unplug = raw_aio_unplug, | |
042b757c | 3364 | .bdrv_attach_aio_context = raw_aio_attach_aio_context, |
3c529d93 | 3365 | |
061ca8a3 | 3366 | .bdrv_co_truncate = raw_co_truncate, |
e60f469c | 3367 | .bdrv_getlength = raw_getlength, |
260a82e5 | 3368 | .bdrv_get_info = raw_get_info, |
4a1d5e1f FZ |
3369 | .bdrv_get_allocated_file_size |
3370 | = raw_get_allocated_file_size, | |
244a5668 FZ |
3371 | .bdrv_check_perm = raw_check_perm, |
3372 | .bdrv_set_perm = raw_set_perm, | |
3373 | .bdrv_abort_perm_update = raw_abort_perm_update, | |
1a9335e4 ET |
3374 | .bdrv_probe_blocksizes = hdev_probe_blocksizes, |
3375 | .bdrv_probe_geometry = hdev_probe_geometry, | |
19cb3738 | 3376 | |
f3a5d3f8 | 3377 | /* generic scsi device */ |
63ec93db | 3378 | #ifdef __linux__ |
2f3a7ab3 | 3379 | .bdrv_co_ioctl = hdev_co_ioctl, |
63ec93db | 3380 | #endif |
f3a5d3f8 CH |
3381 | }; |
3382 | ||
18fa1c42 HR |
3383 | #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
3384 | static void cdrom_parse_filename(const char *filename, QDict *options, | |
3385 | Error **errp) | |
3386 | { | |
03c320d8 | 3387 | bdrv_parse_filename_strip_prefix(filename, "host_cdrom:", options); |
18fa1c42 HR |
3388 | } |
3389 | #endif | |
3390 | ||
3391 | #ifdef __linux__ | |
015a1036 HR |
3392 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
3393 | Error **errp) | |
f3a5d3f8 CH |
3394 | { |
3395 | BDRVRawState *s = bs->opaque; | |
3396 | ||
f3a5d3f8 CH |
3397 | s->type = FTYPE_CD; |
3398 | ||
19a3da7f | 3399 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
230ff739 | 3400 | return raw_open_common(bs, options, flags, O_NONBLOCK, true, errp); |
f3a5d3f8 CH |
3401 | } |
3402 | ||
508c7cb3 CH |
3403 | static int cdrom_probe_device(const char *filename) |
3404 | { | |
3baf720e CR |
3405 | int fd, ret; |
3406 | int prio = 0; | |
343f8568 | 3407 | struct stat st; |
3baf720e | 3408 | |
6165f4d8 | 3409 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
3baf720e CR |
3410 | if (fd < 0) { |
3411 | goto out; | |
3412 | } | |
343f8568 JS |
3413 | ret = fstat(fd, &st); |
3414 | if (ret == -1 || !S_ISBLK(st.st_mode)) { | |
3415 | goto outc; | |
3416 | } | |
3baf720e CR |
3417 | |
3418 | /* Attempt to detect via a CDROM specific ioctl */ | |
3419 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
3420 | if (ret >= 0) | |
3421 | prio = 100; | |
3422 | ||
343f8568 | 3423 | outc: |
2e1e79da | 3424 | qemu_close(fd); |
3baf720e CR |
3425 | out: |
3426 | return prio; | |
508c7cb3 CH |
3427 | } |
3428 | ||
e031f750 | 3429 | static bool cdrom_is_inserted(BlockDriverState *bs) |
f3a5d3f8 CH |
3430 | { |
3431 | BDRVRawState *s = bs->opaque; | |
3432 | int ret; | |
3433 | ||
3434 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
e031f750 | 3435 | return ret == CDS_DISC_OK; |
f3a5d3f8 CH |
3436 | } |
3437 | ||
f36f3949 | 3438 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
3439 | { |
3440 | BDRVRawState *s = bs->opaque; | |
3441 | ||
3442 | if (eject_flag) { | |
3443 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
3444 | perror("CDROMEJECT"); | |
3445 | } else { | |
3446 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
3447 | perror("CDROMEJECT"); | |
3448 | } | |
f3a5d3f8 CH |
3449 | } |
3450 | ||
025e849a | 3451 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
3452 | { |
3453 | BDRVRawState *s = bs->opaque; | |
3454 | ||
3455 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
3456 | /* | |
3457 | * Note: an error can happen if the distribution automatically | |
3458 | * mounts the CD-ROM | |
3459 | */ | |
3460 | /* perror("CDROM_LOCKDOOR"); */ | |
3461 | } | |
f3a5d3f8 CH |
3462 | } |
3463 | ||
3464 | static BlockDriver bdrv_host_cdrom = { | |
3465 | .format_name = "host_cdrom", | |
84a12e66 | 3466 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 3467 | .instance_size = sizeof(BDRVRawState), |
030be321 | 3468 | .bdrv_needs_filename = true, |
508c7cb3 | 3469 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 3470 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 3471 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 3472 | .bdrv_close = raw_close, |
1bc6b705 JC |
3473 | .bdrv_reopen_prepare = raw_reopen_prepare, |
3474 | .bdrv_reopen_commit = raw_reopen_commit, | |
3475 | .bdrv_reopen_abort = raw_reopen_abort, | |
efc75e2a | 3476 | .bdrv_co_create_opts = hdev_co_create_opts, |
6f482f74 | 3477 | .create_opts = &raw_create_opts, |
8a2ce0bc | 3478 | .mutable_opts = mutable_opts, |
dd577a26 | 3479 | .bdrv_co_invalidate_cache = raw_co_invalidate_cache, |
f3a5d3f8 | 3480 | |
9d52aa3c KW |
3481 | |
3482 | .bdrv_co_preadv = raw_co_preadv, | |
3483 | .bdrv_co_pwritev = raw_co_pwritev, | |
33d70fb6 | 3484 | .bdrv_co_flush_to_disk = raw_co_flush_to_disk, |
c25f53b0 | 3485 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
3486 | .bdrv_io_plug = raw_aio_plug, |
3487 | .bdrv_io_unplug = raw_aio_unplug, | |
042b757c | 3488 | .bdrv_attach_aio_context = raw_aio_attach_aio_context, |
f3a5d3f8 | 3489 | |
061ca8a3 | 3490 | .bdrv_co_truncate = raw_co_truncate, |
b94a2610 KW |
3491 | .bdrv_getlength = raw_getlength, |
3492 | .has_variable_length = true, | |
4a1d5e1f FZ |
3493 | .bdrv_get_allocated_file_size |
3494 | = raw_get_allocated_file_size, | |
f3a5d3f8 CH |
3495 | |
3496 | /* removable device support */ | |
3497 | .bdrv_is_inserted = cdrom_is_inserted, | |
3498 | .bdrv_eject = cdrom_eject, | |
025e849a | 3499 | .bdrv_lock_medium = cdrom_lock_medium, |
f3a5d3f8 CH |
3500 | |
3501 | /* generic scsi device */ | |
2f3a7ab3 | 3502 | .bdrv_co_ioctl = hdev_co_ioctl, |
f3a5d3f8 CH |
3503 | }; |
3504 | #endif /* __linux__ */ | |
3505 | ||
a167ba50 | 3506 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
511018e4 AT |
3507 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
3508 | Error **errp) | |
f3a5d3f8 CH |
3509 | { |
3510 | BDRVRawState *s = bs->opaque; | |
e428e439 | 3511 | Error *local_err = NULL; |
f3a5d3f8 CH |
3512 | int ret; |
3513 | ||
3514 | s->type = FTYPE_CD; | |
3515 | ||
230ff739 | 3516 | ret = raw_open_common(bs, options, flags, 0, true, &local_err); |
e428e439 | 3517 | if (ret) { |
621ff94d | 3518 | error_propagate(errp, local_err); |
f3a5d3f8 | 3519 | return ret; |
e428e439 | 3520 | } |
f3a5d3f8 | 3521 | |
9b2260cb | 3522 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
3523 | ioctl(s->fd, CDIOCALLOW); |
3524 | return 0; | |
3525 | } | |
3526 | ||
508c7cb3 CH |
3527 | static int cdrom_probe_device(const char *filename) |
3528 | { | |
3529 | if (strstart(filename, "/dev/cd", NULL) || | |
3530 | strstart(filename, "/dev/acd", NULL)) | |
3531 | return 100; | |
3532 | return 0; | |
3533 | } | |
3534 | ||
f3a5d3f8 CH |
3535 | static int cdrom_reopen(BlockDriverState *bs) |
3536 | { | |
3537 | BDRVRawState *s = bs->opaque; | |
3538 | int fd; | |
3539 | ||
3540 | /* | |
3541 | * Force reread of possibly changed/newly loaded disc, | |
3542 | * FreeBSD seems to not notice sometimes... | |
3543 | */ | |
3544 | if (s->fd >= 0) | |
2e1e79da | 3545 | qemu_close(s->fd); |
6165f4d8 | 3546 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
f3a5d3f8 CH |
3547 | if (fd < 0) { |
3548 | s->fd = -1; | |
3549 | return -EIO; | |
3550 | } | |
3551 | s->fd = fd; | |
3552 | ||
9b2260cb | 3553 | /* make sure the door isn't locked at this time */ |
f3a5d3f8 CH |
3554 | ioctl(s->fd, CDIOCALLOW); |
3555 | return 0; | |
3556 | } | |
3557 | ||
e031f750 | 3558 | static bool cdrom_is_inserted(BlockDriverState *bs) |
f3a5d3f8 CH |
3559 | { |
3560 | return raw_getlength(bs) > 0; | |
3561 | } | |
3562 | ||
f36f3949 | 3563 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
f3a5d3f8 CH |
3564 | { |
3565 | BDRVRawState *s = bs->opaque; | |
3566 | ||
3567 | if (s->fd < 0) | |
822e1cd1 | 3568 | return; |
f3a5d3f8 CH |
3569 | |
3570 | (void) ioctl(s->fd, CDIOCALLOW); | |
3571 | ||
3572 | if (eject_flag) { | |
3573 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
3574 | perror("CDIOCEJECT"); | |
3575 | } else { | |
3576 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
3577 | perror("CDIOCCLOSE"); | |
3578 | } | |
3579 | ||
822e1cd1 | 3580 | cdrom_reopen(bs); |
f3a5d3f8 CH |
3581 | } |
3582 | ||
025e849a | 3583 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
f3a5d3f8 CH |
3584 | { |
3585 | BDRVRawState *s = bs->opaque; | |
3586 | ||
3587 | if (s->fd < 0) | |
7bf37fed | 3588 | return; |
f3a5d3f8 CH |
3589 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
3590 | /* | |
3591 | * Note: an error can happen if the distribution automatically | |
3592 | * mounts the CD-ROM | |
3593 | */ | |
3594 | /* perror("CDROM_LOCKDOOR"); */ | |
3595 | } | |
f3a5d3f8 CH |
3596 | } |
3597 | ||
3598 | static BlockDriver bdrv_host_cdrom = { | |
3599 | .format_name = "host_cdrom", | |
84a12e66 | 3600 | .protocol_name = "host_cdrom", |
f3a5d3f8 | 3601 | .instance_size = sizeof(BDRVRawState), |
030be321 | 3602 | .bdrv_needs_filename = true, |
508c7cb3 | 3603 | .bdrv_probe_device = cdrom_probe_device, |
18fa1c42 | 3604 | .bdrv_parse_filename = cdrom_parse_filename, |
66f82cee | 3605 | .bdrv_file_open = cdrom_open, |
f3a5d3f8 | 3606 | .bdrv_close = raw_close, |
1bc6b705 JC |
3607 | .bdrv_reopen_prepare = raw_reopen_prepare, |
3608 | .bdrv_reopen_commit = raw_reopen_commit, | |
3609 | .bdrv_reopen_abort = raw_reopen_abort, | |
efc75e2a | 3610 | .bdrv_co_create_opts = hdev_co_create_opts, |
6f482f74 | 3611 | .create_opts = &raw_create_opts, |
8a2ce0bc | 3612 | .mutable_opts = mutable_opts, |
f3a5d3f8 | 3613 | |
9d52aa3c KW |
3614 | .bdrv_co_preadv = raw_co_preadv, |
3615 | .bdrv_co_pwritev = raw_co_pwritev, | |
33d70fb6 | 3616 | .bdrv_co_flush_to_disk = raw_co_flush_to_disk, |
c25f53b0 | 3617 | .bdrv_refresh_limits = raw_refresh_limits, |
1b3abdcc ML |
3618 | .bdrv_io_plug = raw_aio_plug, |
3619 | .bdrv_io_unplug = raw_aio_unplug, | |
042b757c | 3620 | .bdrv_attach_aio_context = raw_aio_attach_aio_context, |
f3a5d3f8 | 3621 | |
061ca8a3 | 3622 | .bdrv_co_truncate = raw_co_truncate, |
b94a2610 KW |
3623 | .bdrv_getlength = raw_getlength, |
3624 | .has_variable_length = true, | |
4a1d5e1f FZ |
3625 | .bdrv_get_allocated_file_size |
3626 | = raw_get_allocated_file_size, | |
f3a5d3f8 | 3627 | |
19cb3738 | 3628 | /* removable device support */ |
f3a5d3f8 CH |
3629 | .bdrv_is_inserted = cdrom_is_inserted, |
3630 | .bdrv_eject = cdrom_eject, | |
025e849a | 3631 | .bdrv_lock_medium = cdrom_lock_medium, |
19cb3738 | 3632 | }; |
f3a5d3f8 | 3633 | #endif /* __FreeBSD__ */ |
5efa9d5a | 3634 | |
84a12e66 | 3635 | static void bdrv_file_init(void) |
5efa9d5a | 3636 | { |
508c7cb3 CH |
3637 | /* |
3638 | * Register all the drivers. Note that order is important, the driver | |
3639 | * registered last will get probed first. | |
3640 | */ | |
84a12e66 | 3641 | bdrv_register(&bdrv_file); |
5efa9d5a | 3642 | bdrv_register(&bdrv_host_device); |
f3a5d3f8 | 3643 | #ifdef __linux__ |
f3a5d3f8 CH |
3644 | bdrv_register(&bdrv_host_cdrom); |
3645 | #endif | |
a167ba50 | 3646 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
f3a5d3f8 CH |
3647 | bdrv_register(&bdrv_host_cdrom); |
3648 | #endif | |
5efa9d5a AL |
3649 | } |
3650 | ||
84a12e66 | 3651 | block_init(bdrv_file_init); |