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Commit | Line | Data |
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83f64091 | 1 | /* |
223d4670 | 2 | * Block driver for RAW files (posix) |
5fafdf24 | 3 | * |
83f64091 | 4 | * Copyright (c) 2006 Fabrice Bellard |
5fafdf24 | 5 | * |
83f64091 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
faf07963 | 24 | #include "qemu-common.h" |
87ecb68b | 25 | #include "qemu-timer.h" |
baf35cb9 | 26 | #include "qemu-char.h" |
83f64091 | 27 | #include "block_int.h" |
5efa9d5a | 28 | #include "module.h" |
414f0dab | 29 | #ifdef CONFIG_AIO |
3c529d93 | 30 | #include "posix-aio-compat.h" |
414f0dab | 31 | #endif |
83f64091 | 32 | |
83f64091 FB |
33 | #ifdef CONFIG_COCOA |
34 | #include <paths.h> | |
35 | #include <sys/param.h> | |
36 | #include <IOKit/IOKitLib.h> | |
37 | #include <IOKit/IOBSD.h> | |
38 | #include <IOKit/storage/IOMediaBSDClient.h> | |
39 | #include <IOKit/storage/IOMedia.h> | |
40 | #include <IOKit/storage/IOCDMedia.h> | |
41 | //#include <IOKit/storage/IOCDTypes.h> | |
42 | #include <CoreFoundation/CoreFoundation.h> | |
43 | #endif | |
44 | ||
45 | #ifdef __sun__ | |
2e9671da TS |
46 | #define _POSIX_PTHREAD_SEMANTICS 1 |
47 | #include <signal.h> | |
83f64091 FB |
48 | #include <sys/dkio.h> |
49 | #endif | |
19cb3738 FB |
50 | #ifdef __linux__ |
51 | #include <sys/ioctl.h> | |
52 | #include <linux/cdrom.h> | |
53 | #include <linux/fd.h> | |
54 | #endif | |
1cb6c3fd | 55 | #ifdef __FreeBSD__ |
543952ca | 56 | #include <signal.h> |
1cb6c3fd | 57 | #include <sys/disk.h> |
9f23011a | 58 | #include <sys/cdio.h> |
1cb6c3fd | 59 | #endif |
83f64091 | 60 | |
128ab2ff BS |
61 | #ifdef __OpenBSD__ |
62 | #include <sys/ioctl.h> | |
63 | #include <sys/disklabel.h> | |
64 | #include <sys/dkio.h> | |
65 | #endif | |
66 | ||
c5e97233 BS |
67 | #ifdef __DragonFly__ |
68 | #include <sys/ioctl.h> | |
69 | #include <sys/diskslice.h> | |
70 | #endif | |
71 | ||
19cb3738 | 72 | //#define DEBUG_FLOPPY |
83f64091 | 73 | |
faf07963 | 74 | //#define DEBUG_BLOCK |
03ff3ca3 | 75 | #if defined(DEBUG_BLOCK) |
001faf32 BS |
76 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ |
77 | { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) | |
8c05dbf9 | 78 | #else |
001faf32 | 79 | #define DEBUG_BLOCK_PRINT(formatCstr, ...) |
8c05dbf9 TS |
80 | #endif |
81 | ||
f6465578 AL |
82 | /* OS X does not have O_DSYNC */ |
83 | #ifndef O_DSYNC | |
1c27a8b3 | 84 | #ifdef O_SYNC |
7ab064d2 | 85 | #define O_DSYNC O_SYNC |
1c27a8b3 | 86 | #elif defined(O_FSYNC) |
87 | #define O_DSYNC O_FSYNC | |
88 | #endif | |
f6465578 AL |
89 | #endif |
90 | ||
9f7965c7 AL |
91 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
92 | #ifndef O_DIRECT | |
93 | #define O_DIRECT O_DSYNC | |
94 | #endif | |
95 | ||
19cb3738 FB |
96 | #define FTYPE_FILE 0 |
97 | #define FTYPE_CD 1 | |
98 | #define FTYPE_FD 2 | |
83f64091 | 99 | |
bed5cc52 FB |
100 | #define ALIGNED_BUFFER_SIZE (32 * 512) |
101 | ||
19cb3738 FB |
102 | /* if the FD is not accessed during that time (in ms), we try to |
103 | reopen it to see if the disk has been changed */ | |
104 | #define FD_OPEN_TIMEOUT 1000 | |
83f64091 | 105 | |
19cb3738 FB |
106 | typedef struct BDRVRawState { |
107 | int fd; | |
108 | int type; | |
8c05dbf9 | 109 | unsigned int lseek_err_cnt; |
0e1d8f4c | 110 | int open_flags; |
19cb3738 FB |
111 | #if defined(__linux__) |
112 | /* linux floppy specific */ | |
19cb3738 FB |
113 | int64_t fd_open_time; |
114 | int64_t fd_error_time; | |
115 | int fd_got_error; | |
116 | int fd_media_changed; | |
83f64091 | 117 | #endif |
bed5cc52 | 118 | uint8_t* aligned_buf; |
19cb3738 FB |
119 | } BDRVRawState; |
120 | ||
a76bab49 AL |
121 | static int posix_aio_init(void); |
122 | ||
19cb3738 | 123 | static int fd_open(BlockDriverState *bs); |
22afa7b5 | 124 | static int64_t raw_getlength(BlockDriverState *bs); |
83f64091 | 125 | |
9f23011a | 126 | #if defined(__FreeBSD__) |
f3a5d3f8 | 127 | static int cdrom_reopen(BlockDriverState *bs); |
9f23011a BS |
128 | #endif |
129 | ||
90babde0 | 130 | static int raw_open_common(BlockDriverState *bs, const char *filename, |
19a3da7f | 131 | int bdrv_flags, int open_flags) |
83f64091 FB |
132 | { |
133 | BDRVRawState *s = bs->opaque; | |
0e1d8f4c | 134 | int fd, ret; |
83f64091 | 135 | |
a76bab49 AL |
136 | posix_aio_init(); |
137 | ||
8c05dbf9 TS |
138 | s->lseek_err_cnt = 0; |
139 | ||
19a3da7f | 140 | s->open_flags = open_flags | O_BINARY; |
11a1feb6 | 141 | s->open_flags &= ~O_ACCMODE; |
19a3da7f | 142 | if ((bdrv_flags & BDRV_O_ACCESS) == BDRV_O_RDWR) { |
0e1d8f4c | 143 | s->open_flags |= O_RDWR; |
83f64091 | 144 | } else { |
0e1d8f4c | 145 | s->open_flags |= O_RDONLY; |
83f64091 FB |
146 | bs->read_only = 1; |
147 | } | |
9f7965c7 AL |
148 | |
149 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, | |
150 | * and O_DIRECT for no caching. */ | |
19a3da7f | 151 | if ((bdrv_flags & BDRV_O_NOCACHE)) |
0e1d8f4c | 152 | s->open_flags |= O_DIRECT; |
19a3da7f | 153 | else if (!(bdrv_flags & BDRV_O_CACHE_WB)) |
0e1d8f4c | 154 | s->open_flags |= O_DSYNC; |
83f64091 | 155 | |
90babde0 | 156 | s->fd = -1; |
0e1d8f4c | 157 | fd = open(filename, s->open_flags, 0644); |
19cb3738 FB |
158 | if (fd < 0) { |
159 | ret = -errno; | |
160 | if (ret == -EROFS) | |
161 | ret = -EACCES; | |
162 | return ret; | |
163 | } | |
83f64091 | 164 | s->fd = fd; |
bed5cc52 | 165 | s->aligned_buf = NULL; |
19a3da7f | 166 | if ((bdrv_flags & BDRV_O_NOCACHE)) { |
e268ca52 | 167 | s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE); |
bed5cc52 FB |
168 | if (s->aligned_buf == NULL) { |
169 | ret = -errno; | |
170 | close(fd); | |
171 | return ret; | |
172 | } | |
173 | } | |
83f64091 FB |
174 | return 0; |
175 | } | |
176 | ||
90babde0 CH |
177 | static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
178 | { | |
179 | BDRVRawState *s = bs->opaque; | |
19a3da7f | 180 | int open_flags = 0; |
90babde0 CH |
181 | |
182 | s->type = FTYPE_FILE; | |
183 | if (flags & BDRV_O_CREAT) | |
19a3da7f | 184 | open_flags = O_CREAT | O_TRUNC; |
90babde0 | 185 | |
19a3da7f | 186 | return raw_open_common(bs, filename, flags, open_flags); |
90babde0 CH |
187 | } |
188 | ||
83f64091 FB |
189 | /* XXX: use host sector size if necessary with: |
190 | #ifdef DIOCGSECTORSIZE | |
191 | { | |
192 | unsigned int sectorsize = 512; | |
193 | if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) && | |
194 | sectorsize > bufsize) | |
195 | bufsize = sectorsize; | |
196 | } | |
197 | #endif | |
198 | #ifdef CONFIG_COCOA | |
199 | u_int32_t blockSize = 512; | |
200 | if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) { | |
201 | bufsize = blockSize; | |
202 | } | |
203 | #endif | |
204 | */ | |
205 | ||
bed5cc52 FB |
206 | /* |
207 | * offset and count are in bytes, but must be multiples of 512 for files | |
208 | * opened with O_DIRECT. buf must be aligned to 512 bytes then. | |
209 | * | |
210 | * This function may be called without alignment if the caller ensures | |
211 | * that O_DIRECT is not in effect. | |
212 | */ | |
213 | static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, | |
83f64091 FB |
214 | uint8_t *buf, int count) |
215 | { | |
216 | BDRVRawState *s = bs->opaque; | |
217 | int ret; | |
3b46e624 | 218 | |
19cb3738 FB |
219 | ret = fd_open(bs); |
220 | if (ret < 0) | |
221 | return ret; | |
222 | ||
985a03b0 | 223 | if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
8c05dbf9 TS |
224 | ++(s->lseek_err_cnt); |
225 | if(s->lseek_err_cnt <= 10) { | |
92868412 JM |
226 | DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
227 | "] lseek failed : %d = %s\n", | |
8c05dbf9 TS |
228 | s->fd, bs->filename, offset, buf, count, |
229 | bs->total_sectors, errno, strerror(errno)); | |
230 | } | |
231 | return -1; | |
232 | } | |
233 | s->lseek_err_cnt=0; | |
234 | ||
83f64091 | 235 | ret = read(s->fd, buf, count); |
8c05dbf9 TS |
236 | if (ret == count) |
237 | goto label__raw_read__success; | |
238 | ||
22afa7b5 KW |
239 | /* Allow reads beyond the end (needed for pwrite) */ |
240 | if ((ret == 0) && bs->growable) { | |
241 | int64_t size = raw_getlength(bs); | |
242 | if (offset >= size) { | |
243 | memset(buf, 0, count); | |
244 | ret = count; | |
245 | goto label__raw_read__success; | |
246 | } | |
247 | } | |
248 | ||
92868412 JM |
249 | DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
250 | "] read failed %d : %d = %s\n", | |
8c05dbf9 TS |
251 | s->fd, bs->filename, offset, buf, count, |
252 | bs->total_sectors, ret, errno, strerror(errno)); | |
253 | ||
254 | /* Try harder for CDrom. */ | |
255 | if (bs->type == BDRV_TYPE_CDROM) { | |
256 | lseek(s->fd, offset, SEEK_SET); | |
257 | ret = read(s->fd, buf, count); | |
258 | if (ret == count) | |
259 | goto label__raw_read__success; | |
260 | lseek(s->fd, offset, SEEK_SET); | |
261 | ret = read(s->fd, buf, count); | |
262 | if (ret == count) | |
263 | goto label__raw_read__success; | |
264 | ||
92868412 JM |
265 | DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
266 | "] retry read failed %d : %d = %s\n", | |
8c05dbf9 TS |
267 | s->fd, bs->filename, offset, buf, count, |
268 | bs->total_sectors, ret, errno, strerror(errno)); | |
269 | } | |
270 | ||
8c05dbf9 TS |
271 | label__raw_read__success: |
272 | ||
94c6d6d8 | 273 | return (ret < 0) ? -errno : ret; |
83f64091 FB |
274 | } |
275 | ||
bed5cc52 FB |
276 | /* |
277 | * offset and count are in bytes, but must be multiples of 512 for files | |
278 | * opened with O_DIRECT. buf must be aligned to 512 bytes then. | |
279 | * | |
280 | * This function may be called without alignment if the caller ensures | |
281 | * that O_DIRECT is not in effect. | |
282 | */ | |
283 | static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, | |
83f64091 FB |
284 | const uint8_t *buf, int count) |
285 | { | |
286 | BDRVRawState *s = bs->opaque; | |
287 | int ret; | |
3b46e624 | 288 | |
19cb3738 FB |
289 | ret = fd_open(bs); |
290 | if (ret < 0) | |
4141d4c2 | 291 | return -errno; |
19cb3738 | 292 | |
985a03b0 | 293 | if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
8c05dbf9 TS |
294 | ++(s->lseek_err_cnt); |
295 | if(s->lseek_err_cnt) { | |
92868412 JM |
296 | DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
297 | PRId64 "] lseek failed : %d = %s\n", | |
8c05dbf9 TS |
298 | s->fd, bs->filename, offset, buf, count, |
299 | bs->total_sectors, errno, strerror(errno)); | |
300 | } | |
4141d4c2 | 301 | return -EIO; |
8c05dbf9 TS |
302 | } |
303 | s->lseek_err_cnt = 0; | |
304 | ||
83f64091 | 305 | ret = write(s->fd, buf, count); |
8c05dbf9 TS |
306 | if (ret == count) |
307 | goto label__raw_write__success; | |
308 | ||
92868412 JM |
309 | DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
310 | "] write failed %d : %d = %s\n", | |
8c05dbf9 TS |
311 | s->fd, bs->filename, offset, buf, count, |
312 | bs->total_sectors, ret, errno, strerror(errno)); | |
313 | ||
8c05dbf9 TS |
314 | label__raw_write__success: |
315 | ||
4141d4c2 | 316 | return (ret < 0) ? -errno : ret; |
83f64091 FB |
317 | } |
318 | ||
bed5cc52 | 319 | |
bed5cc52 FB |
320 | /* |
321 | * offset and count are in bytes and possibly not aligned. For files opened | |
322 | * with O_DIRECT, necessary alignments are ensured before calling | |
323 | * raw_pread_aligned to do the actual read. | |
324 | */ | |
325 | static int raw_pread(BlockDriverState *bs, int64_t offset, | |
326 | uint8_t *buf, int count) | |
327 | { | |
328 | BDRVRawState *s = bs->opaque; | |
329 | int size, ret, shift, sum; | |
330 | ||
331 | sum = 0; | |
332 | ||
333 | if (s->aligned_buf != NULL) { | |
334 | ||
335 | if (offset & 0x1ff) { | |
336 | /* align offset on a 512 bytes boundary */ | |
337 | ||
338 | shift = offset & 0x1ff; | |
339 | size = (shift + count + 0x1ff) & ~0x1ff; | |
340 | if (size > ALIGNED_BUFFER_SIZE) | |
341 | size = ALIGNED_BUFFER_SIZE; | |
342 | ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); | |
343 | if (ret < 0) | |
344 | return ret; | |
345 | ||
346 | size = 512 - shift; | |
347 | if (size > count) | |
348 | size = count; | |
349 | memcpy(buf, s->aligned_buf + shift, size); | |
350 | ||
351 | buf += size; | |
352 | offset += size; | |
353 | count -= size; | |
354 | sum += size; | |
355 | ||
356 | if (count == 0) | |
357 | return sum; | |
358 | } | |
359 | if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { | |
360 | ||
361 | /* read on aligned buffer */ | |
362 | ||
363 | while (count) { | |
364 | ||
365 | size = (count + 0x1ff) & ~0x1ff; | |
366 | if (size > ALIGNED_BUFFER_SIZE) | |
367 | size = ALIGNED_BUFFER_SIZE; | |
368 | ||
369 | ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); | |
370 | if (ret < 0) | |
371 | return ret; | |
372 | ||
373 | size = ret; | |
374 | if (size > count) | |
375 | size = count; | |
376 | ||
377 | memcpy(buf, s->aligned_buf, size); | |
378 | ||
379 | buf += size; | |
380 | offset += size; | |
381 | count -= size; | |
382 | sum += size; | |
383 | } | |
384 | ||
385 | return sum; | |
386 | } | |
387 | } | |
388 | ||
389 | return raw_pread_aligned(bs, offset, buf, count) + sum; | |
390 | } | |
391 | ||
eda578e5 AL |
392 | static int raw_read(BlockDriverState *bs, int64_t sector_num, |
393 | uint8_t *buf, int nb_sectors) | |
394 | { | |
537a1d4b AL |
395 | int ret; |
396 | ||
397 | ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512); | |
398 | if (ret == (nb_sectors * 512)) | |
399 | ret = 0; | |
400 | return ret; | |
eda578e5 AL |
401 | } |
402 | ||
bed5cc52 FB |
403 | /* |
404 | * offset and count are in bytes and possibly not aligned. For files opened | |
405 | * with O_DIRECT, necessary alignments are ensured before calling | |
406 | * raw_pwrite_aligned to do the actual write. | |
407 | */ | |
408 | static int raw_pwrite(BlockDriverState *bs, int64_t offset, | |
409 | const uint8_t *buf, int count) | |
410 | { | |
411 | BDRVRawState *s = bs->opaque; | |
412 | int size, ret, shift, sum; | |
413 | ||
414 | sum = 0; | |
415 | ||
416 | if (s->aligned_buf != NULL) { | |
417 | ||
418 | if (offset & 0x1ff) { | |
419 | /* align offset on a 512 bytes boundary */ | |
420 | shift = offset & 0x1ff; | |
421 | ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512); | |
422 | if (ret < 0) | |
423 | return ret; | |
424 | ||
425 | size = 512 - shift; | |
426 | if (size > count) | |
427 | size = count; | |
428 | memcpy(s->aligned_buf + shift, buf, size); | |
429 | ||
430 | ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512); | |
431 | if (ret < 0) | |
432 | return ret; | |
433 | ||
434 | buf += size; | |
435 | offset += size; | |
436 | count -= size; | |
437 | sum += size; | |
438 | ||
439 | if (count == 0) | |
440 | return sum; | |
441 | } | |
442 | if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { | |
443 | ||
444 | while ((size = (count & ~0x1ff)) != 0) { | |
445 | ||
446 | if (size > ALIGNED_BUFFER_SIZE) | |
447 | size = ALIGNED_BUFFER_SIZE; | |
448 | ||
449 | memcpy(s->aligned_buf, buf, size); | |
450 | ||
451 | ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); | |
452 | if (ret < 0) | |
453 | return ret; | |
454 | ||
455 | buf += ret; | |
456 | offset += ret; | |
457 | count -= ret; | |
458 | sum += ret; | |
459 | } | |
460 | /* here, count < 512 because (count & ~0x1ff) == 0 */ | |
461 | if (count) { | |
462 | ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512); | |
463 | if (ret < 0) | |
464 | return ret; | |
465 | memcpy(s->aligned_buf, buf, count); | |
466 | ||
467 | ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512); | |
468 | if (ret < 0) | |
469 | return ret; | |
470 | if (count < ret) | |
471 | ret = count; | |
472 | ||
473 | sum += ret; | |
474 | } | |
475 | return sum; | |
476 | } | |
477 | } | |
478 | return raw_pwrite_aligned(bs, offset, buf, count) + sum; | |
479 | } | |
480 | ||
eda578e5 AL |
481 | static int raw_write(BlockDriverState *bs, int64_t sector_num, |
482 | const uint8_t *buf, int nb_sectors) | |
483 | { | |
537a1d4b AL |
484 | int ret; |
485 | ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512); | |
486 | if (ret == (nb_sectors * 512)) | |
487 | ret = 0; | |
488 | return ret; | |
eda578e5 AL |
489 | } |
490 | ||
414f0dab | 491 | #ifdef CONFIG_AIO |
83f64091 | 492 | /***********************************************************/ |
19cb3738 | 493 | /* Unix AIO using POSIX AIO */ |
83f64091 FB |
494 | |
495 | typedef struct RawAIOCB { | |
ce1a14dc | 496 | BlockDriverAIOCB common; |
3c529d93 | 497 | struct qemu_paiocb aiocb; |
ce1a14dc | 498 | struct RawAIOCB *next; |
bed5cc52 | 499 | int ret; |
83f64091 FB |
500 | } RawAIOCB; |
501 | ||
a76bab49 AL |
502 | typedef struct PosixAioState |
503 | { | |
9e472e10 | 504 | int rfd, wfd; |
a76bab49 AL |
505 | RawAIOCB *first_aio; |
506 | } PosixAioState; | |
83f64091 | 507 | |
a76bab49 | 508 | static void posix_aio_read(void *opaque) |
83f64091 | 509 | { |
a76bab49 | 510 | PosixAioState *s = opaque; |
ce1a14dc | 511 | RawAIOCB *acb, **pacb; |
83f64091 | 512 | int ret; |
9e472e10 AL |
513 | ssize_t len; |
514 | ||
e20e830b AL |
515 | /* read all bytes from signal pipe */ |
516 | for (;;) { | |
517 | char bytes[16]; | |
9e472e10 | 518 | |
e20e830b | 519 | len = read(s->rfd, bytes, sizeof(bytes)); |
2c41a5f9 | 520 | if (len == -1 && errno == EINTR) |
e20e830b AL |
521 | continue; /* try again */ |
522 | if (len == sizeof(bytes)) | |
523 | continue; /* more to read */ | |
524 | break; | |
525 | } | |
83f64091 FB |
526 | |
527 | for(;;) { | |
a76bab49 | 528 | pacb = &s->first_aio; |
83f64091 FB |
529 | for(;;) { |
530 | acb = *pacb; | |
531 | if (!acb) | |
532 | goto the_end; | |
3c529d93 | 533 | ret = qemu_paio_error(&acb->aiocb); |
83f64091 FB |
534 | if (ret == ECANCELED) { |
535 | /* remove the request */ | |
ce1a14dc PB |
536 | *pacb = acb->next; |
537 | qemu_aio_release(acb); | |
83f64091 FB |
538 | } else if (ret != EINPROGRESS) { |
539 | /* end of aio */ | |
540 | if (ret == 0) { | |
3c529d93 | 541 | ret = qemu_paio_return(&acb->aiocb); |
ce1a14dc | 542 | if (ret == acb->aiocb.aio_nbytes) |
83f64091 FB |
543 | ret = 0; |
544 | else | |
19cb3738 | 545 | ret = -EINVAL; |
83f64091 FB |
546 | } else { |
547 | ret = -ret; | |
548 | } | |
549 | /* remove the request */ | |
ce1a14dc | 550 | *pacb = acb->next; |
83f64091 | 551 | /* call the callback */ |
ce1a14dc PB |
552 | acb->common.cb(acb->common.opaque, ret); |
553 | qemu_aio_release(acb); | |
83f64091 FB |
554 | break; |
555 | } else { | |
ce1a14dc | 556 | pacb = &acb->next; |
83f64091 FB |
557 | } |
558 | } | |
559 | } | |
560 | the_end: ; | |
561 | } | |
562 | ||
a76bab49 | 563 | static int posix_aio_flush(void *opaque) |
baf35cb9 | 564 | { |
a76bab49 AL |
565 | PosixAioState *s = opaque; |
566 | return !!s->first_aio; | |
567 | } | |
568 | ||
569 | static PosixAioState *posix_aio_state; | |
baf35cb9 | 570 | |
9e472e10 AL |
571 | static void aio_signal_handler(int signum) |
572 | { | |
573 | if (posix_aio_state) { | |
574 | char byte = 0; | |
575 | ||
576 | write(posix_aio_state->wfd, &byte, sizeof(byte)); | |
577 | } | |
578 | ||
579 | qemu_service_io(); | |
580 | } | |
581 | ||
a76bab49 AL |
582 | static int posix_aio_init(void) |
583 | { | |
9e472e10 | 584 | struct sigaction act; |
a76bab49 | 585 | PosixAioState *s; |
9e472e10 | 586 | int fds[2]; |
3c529d93 | 587 | struct qemu_paioinit ai; |
a76bab49 AL |
588 | |
589 | if (posix_aio_state) | |
590 | return 0; | |
ad02ad6f | 591 | |
a76bab49 | 592 | s = qemu_malloc(sizeof(PosixAioState)); |
baf35cb9 | 593 | |
9e472e10 AL |
594 | sigfillset(&act.sa_mask); |
595 | act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ | |
596 | act.sa_handler = aio_signal_handler; | |
597 | sigaction(SIGUSR2, &act, NULL); | |
598 | ||
a76bab49 | 599 | s->first_aio = NULL; |
9e472e10 AL |
600 | if (pipe(fds) == -1) { |
601 | fprintf(stderr, "failed to create pipe\n"); | |
27463101 AL |
602 | return -errno; |
603 | } | |
2c41a5f9 | 604 | |
9e472e10 AL |
605 | s->rfd = fds[0]; |
606 | s->wfd = fds[1]; | |
607 | ||
e20e830b | 608 | fcntl(s->rfd, F_SETFL, O_NONBLOCK); |
9e472e10 | 609 | fcntl(s->wfd, F_SETFL, O_NONBLOCK); |
2c41a5f9 | 610 | |
9e472e10 | 611 | qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s); |
baf35cb9 | 612 | |
3c529d93 AL |
613 | memset(&ai, 0, sizeof(ai)); |
614 | ai.aio_threads = 64; | |
615 | ai.aio_num = 64; | |
616 | qemu_paio_init(&ai); | |
acce87f9 | 617 | |
a76bab49 | 618 | posix_aio_state = s; |
6eb5733a | 619 | |
a76bab49 | 620 | return 0; |
83f64091 FB |
621 | } |
622 | ||
c16b5a2c CH |
623 | static void raw_aio_remove(RawAIOCB *acb) |
624 | { | |
625 | RawAIOCB **pacb; | |
626 | ||
627 | /* remove the callback from the queue */ | |
628 | pacb = &posix_aio_state->first_aio; | |
629 | for(;;) { | |
630 | if (*pacb == NULL) { | |
631 | fprintf(stderr, "raw_aio_remove: aio request not found!\n"); | |
632 | break; | |
633 | } else if (*pacb == acb) { | |
634 | *pacb = acb->next; | |
635 | qemu_aio_release(acb); | |
636 | break; | |
637 | } | |
638 | pacb = &(*pacb)->next; | |
639 | } | |
640 | } | |
641 | ||
642 | static void raw_aio_cancel(BlockDriverAIOCB *blockacb) | |
643 | { | |
644 | int ret; | |
645 | RawAIOCB *acb = (RawAIOCB *)blockacb; | |
646 | ||
647 | ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); | |
648 | if (ret == QEMU_PAIO_NOTCANCELED) { | |
649 | /* fail safe: if the aio could not be canceled, we wait for | |
650 | it */ | |
651 | while (qemu_paio_error(&acb->aiocb) == EINPROGRESS); | |
652 | } | |
653 | ||
654 | raw_aio_remove(acb); | |
655 | } | |
656 | ||
657 | static AIOPool raw_aio_pool = { | |
658 | .aiocb_size = sizeof(RawAIOCB), | |
659 | .cancel = raw_aio_cancel, | |
660 | }; | |
661 | ||
f141eafe AL |
662 | static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num, |
663 | QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 664 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 665 | { |
ce1a14dc PB |
666 | BDRVRawState *s = bs->opaque; |
667 | RawAIOCB *acb; | |
668 | ||
19cb3738 FB |
669 | if (fd_open(bs) < 0) |
670 | return NULL; | |
671 | ||
c16b5a2c | 672 | acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque); |
ce1a14dc PB |
673 | if (!acb) |
674 | return NULL; | |
3c529d93 | 675 | acb->aiocb.aio_fildes = s->fd; |
55f11ca3 | 676 | acb->aiocb.ev_signo = SIGUSR2; |
f141eafe AL |
677 | acb->aiocb.aio_iov = qiov->iov; |
678 | acb->aiocb.aio_niov = qiov->niov; | |
679 | acb->aiocb.aio_nbytes = nb_sectors * 512; | |
ce1a14dc | 680 | acb->aiocb.aio_offset = sector_num * 512; |
f141eafe AL |
681 | acb->aiocb.aio_flags = 0; |
682 | ||
683 | /* | |
684 | * If O_DIRECT is used the buffer needs to be aligned on a sector | |
685 | * boundary. Tell the low level code to ensure that in case it's | |
686 | * not done yet. | |
687 | */ | |
688 | if (s->aligned_buf) | |
689 | acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED; | |
690 | ||
a76bab49 AL |
691 | acb->next = posix_aio_state->first_aio; |
692 | posix_aio_state->first_aio = acb; | |
ce1a14dc | 693 | return acb; |
83f64091 FB |
694 | } |
695 | ||
f141eafe AL |
696 | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, |
697 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 698 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 699 | { |
ce1a14dc | 700 | RawAIOCB *acb; |
83f64091 | 701 | |
f141eafe | 702 | acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque); |
ce1a14dc PB |
703 | if (!acb) |
704 | return NULL; | |
3c529d93 | 705 | if (qemu_paio_read(&acb->aiocb) < 0) { |
22bf1458 | 706 | raw_aio_remove(acb); |
ce1a14dc | 707 | return NULL; |
5fafdf24 | 708 | } |
ce1a14dc | 709 | return &acb->common; |
83f64091 FB |
710 | } |
711 | ||
f141eafe AL |
712 | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, |
713 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 714 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 | 715 | { |
ce1a14dc | 716 | RawAIOCB *acb; |
83f64091 | 717 | |
f141eafe | 718 | acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque); |
ce1a14dc PB |
719 | if (!acb) |
720 | return NULL; | |
3c529d93 | 721 | if (qemu_paio_write(&acb->aiocb) < 0) { |
22bf1458 | 722 | raw_aio_remove(acb); |
ce1a14dc | 723 | return NULL; |
5fafdf24 | 724 | } |
ce1a14dc | 725 | return &acb->common; |
83f64091 | 726 | } |
a76bab49 AL |
727 | #else /* CONFIG_AIO */ |
728 | static int posix_aio_init(void) | |
414f0dab | 729 | { |
674a24ac | 730 | return 0; |
414f0dab | 731 | } |
414f0dab BS |
732 | #endif /* CONFIG_AIO */ |
733 | ||
53538725 | 734 | |
83f64091 FB |
735 | static void raw_close(BlockDriverState *bs) |
736 | { | |
737 | BDRVRawState *s = bs->opaque; | |
19cb3738 FB |
738 | if (s->fd >= 0) { |
739 | close(s->fd); | |
740 | s->fd = -1; | |
bed5cc52 FB |
741 | if (s->aligned_buf != NULL) |
742 | qemu_free(s->aligned_buf); | |
19cb3738 | 743 | } |
83f64091 FB |
744 | } |
745 | ||
746 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
747 | { | |
748 | BDRVRawState *s = bs->opaque; | |
19cb3738 FB |
749 | if (s->type != FTYPE_FILE) |
750 | return -ENOTSUP; | |
83f64091 FB |
751 | if (ftruncate(s->fd, offset) < 0) |
752 | return -errno; | |
753 | return 0; | |
754 | } | |
755 | ||
128ab2ff BS |
756 | #ifdef __OpenBSD__ |
757 | static int64_t raw_getlength(BlockDriverState *bs) | |
758 | { | |
759 | BDRVRawState *s = bs->opaque; | |
760 | int fd = s->fd; | |
761 | struct stat st; | |
762 | ||
763 | if (fstat(fd, &st)) | |
764 | return -1; | |
765 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { | |
766 | struct disklabel dl; | |
767 | ||
768 | if (ioctl(fd, DIOCGDINFO, &dl)) | |
769 | return -1; | |
770 | return (uint64_t)dl.d_secsize * | |
771 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; | |
772 | } else | |
773 | return st.st_size; | |
774 | } | |
775 | #else /* !__OpenBSD__ */ | |
83f64091 FB |
776 | static int64_t raw_getlength(BlockDriverState *bs) |
777 | { | |
778 | BDRVRawState *s = bs->opaque; | |
779 | int fd = s->fd; | |
780 | int64_t size; | |
179a2c19 | 781 | #ifdef HOST_BSD |
83f64091 | 782 | struct stat sb; |
9f23011a BS |
783 | #ifdef __FreeBSD__ |
784 | int reopened = 0; | |
785 | #endif | |
83f64091 FB |
786 | #endif |
787 | #ifdef __sun__ | |
788 | struct dk_minfo minfo; | |
789 | int rv; | |
790 | #endif | |
19cb3738 FB |
791 | int ret; |
792 | ||
793 | ret = fd_open(bs); | |
794 | if (ret < 0) | |
795 | return ret; | |
83f64091 | 796 | |
179a2c19 | 797 | #ifdef HOST_BSD |
9f23011a BS |
798 | #ifdef __FreeBSD__ |
799 | again: | |
800 | #endif | |
83f64091 FB |
801 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
802 | #ifdef DIOCGMEDIASIZE | |
803 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) | |
c5e97233 BS |
804 | #elif defined(DIOCGPART) |
805 | { | |
806 | struct partinfo pi; | |
807 | if (ioctl(fd, DIOCGPART, &pi) == 0) | |
808 | size = pi.media_size; | |
809 | else | |
810 | size = 0; | |
811 | } | |
812 | if (size == 0) | |
83f64091 FB |
813 | #endif |
814 | #ifdef CONFIG_COCOA | |
815 | size = LONG_LONG_MAX; | |
816 | #else | |
817 | size = lseek(fd, 0LL, SEEK_END); | |
9f23011a BS |
818 | #endif |
819 | #ifdef __FreeBSD__ | |
820 | switch(s->type) { | |
821 | case FTYPE_CD: | |
822 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ | |
823 | if (size == 2048LL * (unsigned)-1) | |
824 | size = 0; | |
825 | /* XXX no disc? maybe we need to reopen... */ | |
f3a5d3f8 | 826 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
9f23011a BS |
827 | reopened = 1; |
828 | goto again; | |
829 | } | |
830 | } | |
83f64091 FB |
831 | #endif |
832 | } else | |
833 | #endif | |
834 | #ifdef __sun__ | |
835 | /* | |
836 | * use the DKIOCGMEDIAINFO ioctl to read the size. | |
837 | */ | |
838 | rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); | |
839 | if ( rv != -1 ) { | |
840 | size = minfo.dki_lbsize * minfo.dki_capacity; | |
841 | } else /* there are reports that lseek on some devices | |
842 | fails, but irc discussion said that contingency | |
843 | on contingency was overkill */ | |
844 | #endif | |
845 | { | |
846 | size = lseek(fd, 0, SEEK_END); | |
847 | } | |
83f64091 FB |
848 | return size; |
849 | } | |
128ab2ff | 850 | #endif |
83f64091 | 851 | |
0e7e1989 | 852 | static int raw_create(const char *filename, QEMUOptionParameter *options) |
83f64091 FB |
853 | { |
854 | int fd; | |
1e37d059 | 855 | int result = 0; |
0e7e1989 | 856 | int64_t total_size = 0; |
83f64091 | 857 | |
0e7e1989 KW |
858 | /* Read out options */ |
859 | while (options && options->name) { | |
860 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
861 | total_size = options->value.n / 512; | |
862 | } | |
863 | options++; | |
864 | } | |
83f64091 | 865 | |
5fafdf24 | 866 | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
83f64091 | 867 | 0644); |
1e37d059 SW |
868 | if (fd < 0) { |
869 | result = -errno; | |
870 | } else { | |
871 | if (ftruncate(fd, total_size * 512) != 0) { | |
872 | result = -errno; | |
873 | } | |
874 | if (close(fd) != 0) { | |
875 | result = -errno; | |
876 | } | |
877 | } | |
878 | return result; | |
83f64091 FB |
879 | } |
880 | ||
881 | static void raw_flush(BlockDriverState *bs) | |
882 | { | |
883 | BDRVRawState *s = bs->opaque; | |
884 | fsync(s->fd); | |
885 | } | |
886 | ||
0e7e1989 KW |
887 | |
888 | static QEMUOptionParameter raw_create_options[] = { | |
db08adf5 KW |
889 | { |
890 | .name = BLOCK_OPT_SIZE, | |
891 | .type = OPT_SIZE, | |
892 | .help = "Virtual disk size" | |
893 | }, | |
0e7e1989 KW |
894 | { NULL } |
895 | }; | |
896 | ||
5efa9d5a | 897 | static BlockDriver bdrv_raw = { |
856ae5c3 BS |
898 | .format_name = "raw", |
899 | .instance_size = sizeof(BDRVRawState), | |
900 | .bdrv_probe = NULL, /* no probe for protocols */ | |
901 | .bdrv_open = raw_open, | |
902 | .bdrv_read = raw_read, | |
903 | .bdrv_write = raw_write, | |
904 | .bdrv_close = raw_close, | |
905 | .bdrv_create = raw_create, | |
906 | .bdrv_flush = raw_flush, | |
3b46e624 | 907 | |
414f0dab | 908 | #ifdef CONFIG_AIO |
f141eafe AL |
909 | .bdrv_aio_readv = raw_aio_readv, |
910 | .bdrv_aio_writev = raw_aio_writev, | |
414f0dab | 911 | #endif |
3c529d93 | 912 | |
83f64091 FB |
913 | .bdrv_truncate = raw_truncate, |
914 | .bdrv_getlength = raw_getlength, | |
0e7e1989 KW |
915 | |
916 | .create_options = raw_create_options, | |
83f64091 FB |
917 | }; |
918 | ||
19cb3738 FB |
919 | /***********************************************/ |
920 | /* host device */ | |
921 | ||
922 | #ifdef CONFIG_COCOA | |
923 | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); | |
924 | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); | |
925 | ||
926 | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) | |
927 | { | |
5fafdf24 | 928 | kern_return_t kernResult; |
19cb3738 FB |
929 | mach_port_t masterPort; |
930 | CFMutableDictionaryRef classesToMatch; | |
931 | ||
932 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); | |
933 | if ( KERN_SUCCESS != kernResult ) { | |
934 | printf( "IOMasterPort returned %d\n", kernResult ); | |
935 | } | |
3b46e624 | 936 | |
5fafdf24 | 937 | classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
19cb3738 FB |
938 | if ( classesToMatch == NULL ) { |
939 | printf( "IOServiceMatching returned a NULL dictionary.\n" ); | |
940 | } else { | |
941 | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); | |
942 | } | |
943 | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); | |
944 | if ( KERN_SUCCESS != kernResult ) | |
945 | { | |
946 | printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); | |
947 | } | |
3b46e624 | 948 | |
19cb3738 FB |
949 | return kernResult; |
950 | } | |
951 | ||
952 | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) | |
953 | { | |
954 | io_object_t nextMedia; | |
955 | kern_return_t kernResult = KERN_FAILURE; | |
956 | *bsdPath = '\0'; | |
957 | nextMedia = IOIteratorNext( mediaIterator ); | |
958 | if ( nextMedia ) | |
959 | { | |
960 | CFTypeRef bsdPathAsCFString; | |
961 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); | |
962 | if ( bsdPathAsCFString ) { | |
963 | size_t devPathLength; | |
964 | strcpy( bsdPath, _PATH_DEV ); | |
965 | strcat( bsdPath, "r" ); | |
966 | devPathLength = strlen( bsdPath ); | |
967 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { | |
968 | kernResult = KERN_SUCCESS; | |
969 | } | |
970 | CFRelease( bsdPathAsCFString ); | |
971 | } | |
972 | IOObjectRelease( nextMedia ); | |
973 | } | |
3b46e624 | 974 | |
19cb3738 FB |
975 | return kernResult; |
976 | } | |
977 | ||
978 | #endif | |
979 | ||
508c7cb3 CH |
980 | static int hdev_probe_device(const char *filename) |
981 | { | |
982 | struct stat st; | |
983 | ||
984 | /* allow a dedicated CD-ROM driver to match with a higher priority */ | |
985 | if (strstart(filename, "/dev/cdrom", NULL)) | |
986 | return 50; | |
987 | ||
988 | if (stat(filename, &st) >= 0 && | |
989 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { | |
990 | return 100; | |
991 | } | |
992 | ||
993 | return 0; | |
994 | } | |
995 | ||
19cb3738 FB |
996 | static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
997 | { | |
998 | BDRVRawState *s = bs->opaque; | |
a76bab49 | 999 | |
19cb3738 FB |
1000 | #ifdef CONFIG_COCOA |
1001 | if (strstart(filename, "/dev/cdrom", NULL)) { | |
1002 | kern_return_t kernResult; | |
1003 | io_iterator_t mediaIterator; | |
1004 | char bsdPath[ MAXPATHLEN ]; | |
1005 | int fd; | |
5fafdf24 | 1006 | |
19cb3738 FB |
1007 | kernResult = FindEjectableCDMedia( &mediaIterator ); |
1008 | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); | |
3b46e624 | 1009 | |
19cb3738 FB |
1010 | if ( bsdPath[ 0 ] != '\0' ) { |
1011 | strcat(bsdPath,"s0"); | |
1012 | /* some CDs don't have a partition 0 */ | |
1013 | fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); | |
1014 | if (fd < 0) { | |
1015 | bsdPath[strlen(bsdPath)-1] = '1'; | |
1016 | } else { | |
1017 | close(fd); | |
1018 | } | |
1019 | filename = bsdPath; | |
1020 | } | |
3b46e624 | 1021 | |
19cb3738 FB |
1022 | if ( mediaIterator ) |
1023 | IOObjectRelease( mediaIterator ); | |
1024 | } | |
1025 | #endif | |
19cb3738 FB |
1026 | |
1027 | s->type = FTYPE_FILE; | |
f3a5d3f8 CH |
1028 | #if defined(__linux__) && defined(CONFIG_AIO) |
1029 | if (strstart(filename, "/dev/sg", NULL)) { | |
985a03b0 | 1030 | bs->sg = 1; |
19cb3738 FB |
1031 | } |
1032 | #endif | |
90babde0 | 1033 | |
19a3da7f | 1034 | return raw_open_common(bs, filename, flags, 0); |
19cb3738 FB |
1035 | } |
1036 | ||
03ff3ca3 | 1037 | #if defined(__linux__) |
19cb3738 FB |
1038 | /* Note: we do not have a reliable method to detect if the floppy is |
1039 | present. The current method is to try to open the floppy at every | |
1040 | I/O and to keep it opened during a few hundreds of ms. */ | |
1041 | static int fd_open(BlockDriverState *bs) | |
1042 | { | |
1043 | BDRVRawState *s = bs->opaque; | |
1044 | int last_media_present; | |
1045 | ||
1046 | if (s->type != FTYPE_FD) | |
1047 | return 0; | |
1048 | last_media_present = (s->fd >= 0); | |
5fafdf24 | 1049 | if (s->fd >= 0 && |
19cb3738 FB |
1050 | (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
1051 | close(s->fd); | |
1052 | s->fd = -1; | |
1053 | #ifdef DEBUG_FLOPPY | |
1054 | printf("Floppy closed\n"); | |
1055 | #endif | |
1056 | } | |
1057 | if (s->fd < 0) { | |
5fafdf24 | 1058 | if (s->fd_got_error && |
19cb3738 FB |
1059 | (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
1060 | #ifdef DEBUG_FLOPPY | |
1061 | printf("No floppy (open delayed)\n"); | |
1062 | #endif | |
1063 | return -EIO; | |
1064 | } | |
0e1d8f4c | 1065 | s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK); |
19cb3738 FB |
1066 | if (s->fd < 0) { |
1067 | s->fd_error_time = qemu_get_clock(rt_clock); | |
1068 | s->fd_got_error = 1; | |
1069 | if (last_media_present) | |
1070 | s->fd_media_changed = 1; | |
1071 | #ifdef DEBUG_FLOPPY | |
1072 | printf("No floppy\n"); | |
1073 | #endif | |
1074 | return -EIO; | |
1075 | } | |
1076 | #ifdef DEBUG_FLOPPY | |
1077 | printf("Floppy opened\n"); | |
1078 | #endif | |
1079 | } | |
1080 | if (!last_media_present) | |
1081 | s->fd_media_changed = 1; | |
1082 | s->fd_open_time = qemu_get_clock(rt_clock); | |
1083 | s->fd_got_error = 0; | |
1084 | return 0; | |
1085 | } | |
19cb3738 | 1086 | |
63ec93db | 1087 | static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
985a03b0 TS |
1088 | { |
1089 | BDRVRawState *s = bs->opaque; | |
1090 | ||
1091 | return ioctl(s->fd, req, buf); | |
1092 | } | |
221f715d | 1093 | |
8185d2c9 | 1094 | #ifdef CONFIG_AIO |
63ec93db | 1095 | static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
221f715d AL |
1096 | unsigned long int req, void *buf, |
1097 | BlockDriverCompletionFunc *cb, void *opaque) | |
1098 | { | |
f141eafe | 1099 | BDRVRawState *s = bs->opaque; |
221f715d AL |
1100 | RawAIOCB *acb; |
1101 | ||
f141eafe AL |
1102 | if (fd_open(bs) < 0) |
1103 | return NULL; | |
1104 | ||
c16b5a2c | 1105 | acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque); |
221f715d AL |
1106 | if (!acb) |
1107 | return NULL; | |
f141eafe AL |
1108 | acb->aiocb.aio_fildes = s->fd; |
1109 | acb->aiocb.ev_signo = SIGUSR2; | |
1110 | acb->aiocb.aio_offset = 0; | |
1111 | acb->aiocb.aio_flags = 0; | |
1112 | ||
1113 | acb->next = posix_aio_state->first_aio; | |
1114 | posix_aio_state->first_aio = acb; | |
221f715d | 1115 | |
f141eafe | 1116 | acb->aiocb.aio_ioctl_buf = buf; |
221f715d AL |
1117 | acb->aiocb.aio_ioctl_cmd = req; |
1118 | if (qemu_paio_ioctl(&acb->aiocb) < 0) { | |
1119 | raw_aio_remove(acb); | |
1120 | return NULL; | |
1121 | } | |
1122 | ||
1123 | return &acb->common; | |
1124 | } | |
8185d2c9 | 1125 | #endif |
221f715d | 1126 | |
9f23011a | 1127 | #elif defined(__FreeBSD__) |
9f23011a BS |
1128 | static int fd_open(BlockDriverState *bs) |
1129 | { | |
1130 | BDRVRawState *s = bs->opaque; | |
1131 | ||
1132 | /* this is just to ensure s->fd is sane (its called by io ops) */ | |
1133 | if (s->fd >= 0) | |
1134 | return 0; | |
1135 | return -EIO; | |
1136 | } | |
9f23011a | 1137 | #else /* !linux && !FreeBSD */ |
19cb3738 | 1138 | |
08af02e2 AL |
1139 | static int fd_open(BlockDriverState *bs) |
1140 | { | |
1141 | return 0; | |
1142 | } | |
1143 | ||
221f715d | 1144 | #endif /* !linux && !FreeBSD */ |
04eeb8b6 | 1145 | |
0e7e1989 | 1146 | static int hdev_create(const char *filename, QEMUOptionParameter *options) |
93c65b47 AL |
1147 | { |
1148 | int fd; | |
1149 | int ret = 0; | |
1150 | struct stat stat_buf; | |
0e7e1989 | 1151 | int64_t total_size = 0; |
93c65b47 | 1152 | |
0e7e1989 KW |
1153 | /* Read out options */ |
1154 | while (options && options->name) { | |
1155 | if (!strcmp(options->name, "size")) { | |
1156 | total_size = options->value.n / 512; | |
1157 | } | |
1158 | options++; | |
1159 | } | |
93c65b47 AL |
1160 | |
1161 | fd = open(filename, O_WRONLY | O_BINARY); | |
1162 | if (fd < 0) | |
1163 | return -EIO; | |
1164 | ||
1165 | if (fstat(fd, &stat_buf) < 0) | |
1166 | ret = -EIO; | |
4099df58 | 1167 | else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
93c65b47 AL |
1168 | ret = -EIO; |
1169 | else if (lseek(fd, 0, SEEK_END) < total_size * 512) | |
1170 | ret = -ENOSPC; | |
1171 | ||
1172 | close(fd); | |
1173 | return ret; | |
1174 | } | |
1175 | ||
5efa9d5a | 1176 | static BlockDriver bdrv_host_device = { |
e60f469c AJ |
1177 | .format_name = "host_device", |
1178 | .instance_size = sizeof(BDRVRawState), | |
508c7cb3 | 1179 | .bdrv_probe_device = hdev_probe_device, |
e60f469c AJ |
1180 | .bdrv_open = hdev_open, |
1181 | .bdrv_close = raw_close, | |
93c65b47 | 1182 | .bdrv_create = hdev_create, |
e60f469c | 1183 | .bdrv_flush = raw_flush, |
3b46e624 | 1184 | |
414f0dab | 1185 | #ifdef CONFIG_AIO |
f141eafe AL |
1186 | .bdrv_aio_readv = raw_aio_readv, |
1187 | .bdrv_aio_writev = raw_aio_writev, | |
414f0dab | 1188 | #endif |
3c529d93 | 1189 | |
eda578e5 AL |
1190 | .bdrv_read = raw_read, |
1191 | .bdrv_write = raw_write, | |
e60f469c | 1192 | .bdrv_getlength = raw_getlength, |
19cb3738 | 1193 | |
f3a5d3f8 | 1194 | /* generic scsi device */ |
63ec93db CH |
1195 | #ifdef __linux__ |
1196 | .bdrv_ioctl = hdev_ioctl, | |
f3a5d3f8 | 1197 | #ifdef CONFIG_AIO |
63ec93db CH |
1198 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
1199 | #endif | |
f3a5d3f8 CH |
1200 | #endif |
1201 | }; | |
1202 | ||
1203 | #ifdef __linux__ | |
1204 | static int floppy_open(BlockDriverState *bs, const char *filename, int flags) | |
1205 | { | |
1206 | BDRVRawState *s = bs->opaque; | |
1207 | int ret; | |
1208 | ||
1209 | posix_aio_init(); | |
1210 | ||
1211 | s->type = FTYPE_FD; | |
f3a5d3f8 | 1212 | |
19a3da7f BS |
1213 | /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ |
1214 | ret = raw_open_common(bs, filename, flags, O_NONBLOCK); | |
f3a5d3f8 CH |
1215 | if (ret) |
1216 | return ret; | |
1217 | ||
1218 | /* close fd so that we can reopen it as needed */ | |
1219 | close(s->fd); | |
1220 | s->fd = -1; | |
1221 | s->fd_media_changed = 1; | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
508c7cb3 CH |
1226 | static int floppy_probe_device(const char *filename) |
1227 | { | |
1228 | if (strstart(filename, "/dev/fd", NULL)) | |
1229 | return 100; | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | ||
f3a5d3f8 CH |
1234 | static int floppy_is_inserted(BlockDriverState *bs) |
1235 | { | |
1236 | return fd_open(bs) >= 0; | |
1237 | } | |
1238 | ||
1239 | static int floppy_media_changed(BlockDriverState *bs) | |
1240 | { | |
1241 | BDRVRawState *s = bs->opaque; | |
1242 | int ret; | |
1243 | ||
1244 | /* | |
1245 | * XXX: we do not have a true media changed indication. | |
1246 | * It does not work if the floppy is changed without trying to read it. | |
1247 | */ | |
1248 | fd_open(bs); | |
1249 | ret = s->fd_media_changed; | |
1250 | s->fd_media_changed = 0; | |
1251 | #ifdef DEBUG_FLOPPY | |
1252 | printf("Floppy changed=%d\n", ret); | |
1253 | #endif | |
1254 | return ret; | |
1255 | } | |
1256 | ||
1257 | static int floppy_eject(BlockDriverState *bs, int eject_flag) | |
1258 | { | |
1259 | BDRVRawState *s = bs->opaque; | |
1260 | int fd; | |
1261 | ||
1262 | if (s->fd >= 0) { | |
1263 | close(s->fd); | |
1264 | s->fd = -1; | |
1265 | } | |
1266 | fd = open(bs->filename, s->open_flags | O_NONBLOCK); | |
1267 | if (fd >= 0) { | |
1268 | if (ioctl(fd, FDEJECT, 0) < 0) | |
1269 | perror("FDEJECT"); | |
1270 | close(fd); | |
1271 | } | |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | static BlockDriver bdrv_host_floppy = { | |
1277 | .format_name = "host_floppy", | |
1278 | .instance_size = sizeof(BDRVRawState), | |
508c7cb3 | 1279 | .bdrv_probe_device = floppy_probe_device, |
f3a5d3f8 CH |
1280 | .bdrv_open = floppy_open, |
1281 | .bdrv_close = raw_close, | |
1282 | .bdrv_create = hdev_create, | |
1283 | .bdrv_flush = raw_flush, | |
1284 | ||
1285 | #ifdef CONFIG_AIO | |
1286 | .bdrv_aio_readv = raw_aio_readv, | |
1287 | .bdrv_aio_writev = raw_aio_writev, | |
1288 | #endif | |
1289 | ||
1290 | .bdrv_read = raw_read, | |
1291 | .bdrv_write = raw_write, | |
1292 | .bdrv_getlength = raw_getlength, | |
1293 | ||
1294 | /* removable device support */ | |
1295 | .bdrv_is_inserted = floppy_is_inserted, | |
1296 | .bdrv_media_changed = floppy_media_changed, | |
1297 | .bdrv_eject = floppy_eject, | |
f3a5d3f8 CH |
1298 | }; |
1299 | ||
1300 | static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) | |
1301 | { | |
1302 | BDRVRawState *s = bs->opaque; | |
1303 | ||
f3a5d3f8 CH |
1304 | s->type = FTYPE_CD; |
1305 | ||
19a3da7f BS |
1306 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
1307 | return raw_open_common(bs, filename, flags, O_NONBLOCK); | |
f3a5d3f8 CH |
1308 | } |
1309 | ||
508c7cb3 CH |
1310 | static int cdrom_probe_device(const char *filename) |
1311 | { | |
1312 | if (strstart(filename, "/dev/cd", NULL)) | |
1313 | return 100; | |
1314 | return 0; | |
1315 | } | |
1316 | ||
f3a5d3f8 CH |
1317 | static int cdrom_is_inserted(BlockDriverState *bs) |
1318 | { | |
1319 | BDRVRawState *s = bs->opaque; | |
1320 | int ret; | |
1321 | ||
1322 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); | |
1323 | if (ret == CDS_DISC_OK) | |
1324 | return 1; | |
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | static int cdrom_eject(BlockDriverState *bs, int eject_flag) | |
1329 | { | |
1330 | BDRVRawState *s = bs->opaque; | |
1331 | ||
1332 | if (eject_flag) { | |
1333 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) | |
1334 | perror("CDROMEJECT"); | |
1335 | } else { | |
1336 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) | |
1337 | perror("CDROMEJECT"); | |
1338 | } | |
1339 | ||
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | static int cdrom_set_locked(BlockDriverState *bs, int locked) | |
1344 | { | |
1345 | BDRVRawState *s = bs->opaque; | |
1346 | ||
1347 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { | |
1348 | /* | |
1349 | * Note: an error can happen if the distribution automatically | |
1350 | * mounts the CD-ROM | |
1351 | */ | |
1352 | /* perror("CDROM_LOCKDOOR"); */ | |
1353 | } | |
1354 | ||
1355 | return 0; | |
1356 | } | |
1357 | ||
1358 | static BlockDriver bdrv_host_cdrom = { | |
1359 | .format_name = "host_cdrom", | |
1360 | .instance_size = sizeof(BDRVRawState), | |
508c7cb3 | 1361 | .bdrv_probe_device = cdrom_probe_device, |
f3a5d3f8 CH |
1362 | .bdrv_open = cdrom_open, |
1363 | .bdrv_close = raw_close, | |
1364 | .bdrv_create = hdev_create, | |
1365 | .bdrv_flush = raw_flush, | |
1366 | ||
1367 | #ifdef CONFIG_AIO | |
1368 | .bdrv_aio_readv = raw_aio_readv, | |
1369 | .bdrv_aio_writev = raw_aio_writev, | |
1370 | #endif | |
1371 | ||
1372 | .bdrv_read = raw_read, | |
1373 | .bdrv_write = raw_write, | |
1374 | .bdrv_getlength = raw_getlength, | |
1375 | ||
1376 | /* removable device support */ | |
1377 | .bdrv_is_inserted = cdrom_is_inserted, | |
1378 | .bdrv_eject = cdrom_eject, | |
1379 | .bdrv_set_locked = cdrom_set_locked, | |
1380 | ||
1381 | /* generic scsi device */ | |
63ec93db | 1382 | .bdrv_ioctl = hdev_ioctl, |
f3a5d3f8 | 1383 | #ifdef CONFIG_AIO |
63ec93db | 1384 | .bdrv_aio_ioctl = hdev_aio_ioctl, |
f3a5d3f8 CH |
1385 | #endif |
1386 | }; | |
1387 | #endif /* __linux__ */ | |
1388 | ||
1389 | #ifdef __FreeBSD__ | |
1390 | static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) | |
1391 | { | |
1392 | BDRVRawState *s = bs->opaque; | |
1393 | int ret; | |
1394 | ||
1395 | s->type = FTYPE_CD; | |
1396 | ||
19a3da7f | 1397 | ret = raw_open_common(bs, filename, flags, 0); |
f3a5d3f8 CH |
1398 | if (ret) |
1399 | return ret; | |
1400 | ||
1401 | /* make sure the door isnt locked at this time */ | |
1402 | ioctl(s->fd, CDIOCALLOW); | |
1403 | return 0; | |
1404 | } | |
1405 | ||
508c7cb3 CH |
1406 | static int cdrom_probe_device(const char *filename) |
1407 | { | |
1408 | if (strstart(filename, "/dev/cd", NULL) || | |
1409 | strstart(filename, "/dev/acd", NULL)) | |
1410 | return 100; | |
1411 | return 0; | |
1412 | } | |
1413 | ||
f3a5d3f8 CH |
1414 | static int cdrom_reopen(BlockDriverState *bs) |
1415 | { | |
1416 | BDRVRawState *s = bs->opaque; | |
1417 | int fd; | |
1418 | ||
1419 | /* | |
1420 | * Force reread of possibly changed/newly loaded disc, | |
1421 | * FreeBSD seems to not notice sometimes... | |
1422 | */ | |
1423 | if (s->fd >= 0) | |
1424 | close(s->fd); | |
1425 | fd = open(bs->filename, s->open_flags, 0644); | |
1426 | if (fd < 0) { | |
1427 | s->fd = -1; | |
1428 | return -EIO; | |
1429 | } | |
1430 | s->fd = fd; | |
1431 | ||
1432 | /* make sure the door isnt locked at this time */ | |
1433 | ioctl(s->fd, CDIOCALLOW); | |
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | static int cdrom_is_inserted(BlockDriverState *bs) | |
1438 | { | |
1439 | return raw_getlength(bs) > 0; | |
1440 | } | |
1441 | ||
1442 | static int cdrom_eject(BlockDriverState *bs, int eject_flag) | |
1443 | { | |
1444 | BDRVRawState *s = bs->opaque; | |
1445 | ||
1446 | if (s->fd < 0) | |
1447 | return -ENOTSUP; | |
1448 | ||
1449 | (void) ioctl(s->fd, CDIOCALLOW); | |
1450 | ||
1451 | if (eject_flag) { | |
1452 | if (ioctl(s->fd, CDIOCEJECT) < 0) | |
1453 | perror("CDIOCEJECT"); | |
1454 | } else { | |
1455 | if (ioctl(s->fd, CDIOCCLOSE) < 0) | |
1456 | perror("CDIOCCLOSE"); | |
1457 | } | |
1458 | ||
1459 | if (cdrom_reopen(bs) < 0) | |
1460 | return -ENOTSUP; | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | static int cdrom_set_locked(BlockDriverState *bs, int locked) | |
1465 | { | |
1466 | BDRVRawState *s = bs->opaque; | |
1467 | ||
1468 | if (s->fd < 0) | |
1469 | return -ENOTSUP; | |
1470 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { | |
1471 | /* | |
1472 | * Note: an error can happen if the distribution automatically | |
1473 | * mounts the CD-ROM | |
1474 | */ | |
1475 | /* perror("CDROM_LOCKDOOR"); */ | |
1476 | } | |
1477 | ||
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | static BlockDriver bdrv_host_cdrom = { | |
1482 | .format_name = "host_cdrom", | |
1483 | .instance_size = sizeof(BDRVRawState), | |
508c7cb3 | 1484 | .bdrv_probe_device = cdrom_probe_device, |
f3a5d3f8 CH |
1485 | .bdrv_open = cdrom_open, |
1486 | .bdrv_close = raw_close, | |
1487 | .bdrv_create = hdev_create, | |
1488 | .bdrv_flush = raw_flush, | |
1489 | ||
1490 | #ifdef CONFIG_AIO | |
1491 | .bdrv_aio_readv = raw_aio_readv, | |
1492 | .bdrv_aio_writev = raw_aio_writev, | |
1493 | #endif | |
1494 | ||
1495 | .bdrv_read = raw_read, | |
1496 | .bdrv_write = raw_write, | |
1497 | .bdrv_getlength = raw_getlength, | |
1498 | ||
19cb3738 | 1499 | /* removable device support */ |
f3a5d3f8 CH |
1500 | .bdrv_is_inserted = cdrom_is_inserted, |
1501 | .bdrv_eject = cdrom_eject, | |
1502 | .bdrv_set_locked = cdrom_set_locked, | |
19cb3738 | 1503 | }; |
f3a5d3f8 | 1504 | #endif /* __FreeBSD__ */ |
5efa9d5a AL |
1505 | |
1506 | static void bdrv_raw_init(void) | |
1507 | { | |
508c7cb3 CH |
1508 | /* |
1509 | * Register all the drivers. Note that order is important, the driver | |
1510 | * registered last will get probed first. | |
1511 | */ | |
5efa9d5a AL |
1512 | bdrv_register(&bdrv_raw); |
1513 | bdrv_register(&bdrv_host_device); | |
f3a5d3f8 CH |
1514 | #ifdef __linux__ |
1515 | bdrv_register(&bdrv_host_floppy); | |
1516 | bdrv_register(&bdrv_host_cdrom); | |
1517 | #endif | |
1518 | #ifdef __FreeBSD__ | |
1519 | bdrv_register(&bdrv_host_cdrom); | |
1520 | #endif | |
5efa9d5a AL |
1521 | } |
1522 | ||
1523 | block_init(bdrv_raw_init); |