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| 1 |
/*
|
|---|---|
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* Block driver for RAW files
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
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* of this software and associated documentation files (the "Software"), to deal
|
| 8 |
* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
|
| 11 |
* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
|
| 14 |
* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
| 22 |
* THE SOFTWARE.
|
| 23 |
*/
|
| 24 |
#ifdef QEMU_IMG
|
| 25 |
#include "qemu-common.h" |
| 26 |
#else
|
| 27 |
#include "vl.h" |
| 28 |
#include "exec-all.h" |
| 29 |
#endif
|
| 30 |
#include "block_int.h" |
| 31 |
#include <assert.h> |
| 32 |
#ifndef _WIN32
|
| 33 |
#include <aio.h> |
| 34 |
|
| 35 |
#ifdef CONFIG_COCOA
|
| 36 |
#include <paths.h> |
| 37 |
#include <sys/param.h> |
| 38 |
#include <IOKit/IOKitLib.h> |
| 39 |
#include <IOKit/IOBSD.h> |
| 40 |
#include <IOKit/storage/IOMediaBSDClient.h> |
| 41 |
#include <IOKit/storage/IOMedia.h> |
| 42 |
#include <IOKit/storage/IOCDMedia.h> |
| 43 |
//#include <IOKit/storage/IOCDTypes.h>
|
| 44 |
#include <CoreFoundation/CoreFoundation.h> |
| 45 |
#endif
|
| 46 |
|
| 47 |
#ifdef __sun__
|
| 48 |
#define _POSIX_PTHREAD_SEMANTICS 1 |
| 49 |
#include <signal.h> |
| 50 |
#include <sys/dkio.h> |
| 51 |
#endif
|
| 52 |
#ifdef __linux__
|
| 53 |
#include <sys/ioctl.h> |
| 54 |
#include <linux/cdrom.h> |
| 55 |
#include <linux/fd.h> |
| 56 |
#endif
|
| 57 |
#ifdef __FreeBSD__
|
| 58 |
#include <sys/disk.h> |
| 59 |
#endif
|
| 60 |
|
| 61 |
//#define DEBUG_FLOPPY
|
| 62 |
|
| 63 |
//#define DEBUG_BLOCK
|
| 64 |
#if defined(DEBUG_BLOCK) && !defined(QEMU_IMG)
|
| 65 |
#define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \ |
| 66 |
{ fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0)
|
| 67 |
#else
|
| 68 |
#define DEBUG_BLOCK_PRINT(formatCstr, args...)
|
| 69 |
#endif
|
| 70 |
|
| 71 |
#define FTYPE_FILE 0 |
| 72 |
#define FTYPE_CD 1 |
| 73 |
#define FTYPE_FD 2 |
| 74 |
|
| 75 |
/* if the FD is not accessed during that time (in ms), we try to
|
| 76 |
reopen it to see if the disk has been changed */
|
| 77 |
#define FD_OPEN_TIMEOUT 1000 |
| 78 |
|
| 79 |
typedef struct BDRVRawState { |
| 80 |
int fd;
|
| 81 |
int type;
|
| 82 |
unsigned int lseek_err_cnt; |
| 83 |
#if defined(__linux__)
|
| 84 |
/* linux floppy specific */
|
| 85 |
int fd_open_flags;
|
| 86 |
int64_t fd_open_time; |
| 87 |
int64_t fd_error_time; |
| 88 |
int fd_got_error;
|
| 89 |
int fd_media_changed;
|
| 90 |
#endif
|
| 91 |
} BDRVRawState; |
| 92 |
|
| 93 |
static int fd_open(BlockDriverState *bs); |
| 94 |
|
| 95 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
| 96 |
{
|
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BDRVRawState *s = bs->opaque; |
| 98 |
int fd, open_flags, ret;
|
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|
| 100 |
s->lseek_err_cnt = 0;
|
| 101 |
|
| 102 |
open_flags = O_BINARY; |
| 103 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
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open_flags |= O_RDWR; |
| 105 |
} else {
|
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open_flags |= O_RDONLY; |
| 107 |
bs->read_only = 1;
|
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} |
| 109 |
if (flags & BDRV_O_CREAT)
|
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open_flags |= O_CREAT | O_TRUNC; |
| 111 |
|
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s->type = FTYPE_FILE; |
| 113 |
|
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fd = open(filename, open_flags, 0644);
|
| 115 |
if (fd < 0) { |
| 116 |
ret = -errno; |
| 117 |
if (ret == -EROFS)
|
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ret = -EACCES; |
| 119 |
return ret;
|
| 120 |
} |
| 121 |
s->fd = fd; |
| 122 |
return 0; |
| 123 |
} |
| 124 |
|
| 125 |
/* XXX: use host sector size if necessary with:
|
| 126 |
#ifdef DIOCGSECTORSIZE
|
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{
|
| 128 |
unsigned int sectorsize = 512;
|
| 129 |
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
|
| 130 |
sectorsize > bufsize)
|
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bufsize = sectorsize;
|
| 132 |
}
|
| 133 |
#endif
|
| 134 |
#ifdef CONFIG_COCOA
|
| 135 |
u_int32_t blockSize = 512;
|
| 136 |
if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
|
| 137 |
bufsize = blockSize;
|
| 138 |
}
|
| 139 |
#endif
|
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*/
|
| 141 |
|
| 142 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
| 143 |
uint8_t *buf, int count)
|
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{
|
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BDRVRawState *s = bs->opaque; |
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int ret;
|
| 147 |
|
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ret = fd_open(bs); |
| 149 |
if (ret < 0) |
| 150 |
return ret;
|
| 151 |
|
| 152 |
if (lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
| 153 |
++(s->lseek_err_cnt); |
| 154 |
if(s->lseek_err_cnt <= 10) { |
| 155 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
| 156 |
"] lseek failed : %d = %s\n",
|
| 157 |
s->fd, bs->filename, offset, buf, count, |
| 158 |
bs->total_sectors, errno, strerror(errno)); |
| 159 |
} |
| 160 |
return -1; |
| 161 |
} |
| 162 |
s->lseek_err_cnt=0;
|
| 163 |
|
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ret = read(s->fd, buf, count); |
| 165 |
if (ret == count)
|
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goto label__raw_read__success;
|
| 167 |
|
| 168 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
| 169 |
"] read failed %d : %d = %s\n",
|
| 170 |
s->fd, bs->filename, offset, buf, count, |
| 171 |
bs->total_sectors, ret, errno, strerror(errno)); |
| 172 |
|
| 173 |
/* Try harder for CDrom. */
|
| 174 |
if (bs->type == BDRV_TYPE_CDROM) {
|
| 175 |
lseek(s->fd, offset, SEEK_SET); |
| 176 |
ret = read(s->fd, buf, count); |
| 177 |
if (ret == count)
|
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goto label__raw_read__success;
|
| 179 |
lseek(s->fd, offset, SEEK_SET); |
| 180 |
ret = read(s->fd, buf, count); |
| 181 |
if (ret == count)
|
| 182 |
goto label__raw_read__success;
|
| 183 |
|
| 184 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
| 185 |
"] retry read failed %d : %d = %s\n",
|
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s->fd, bs->filename, offset, buf, count, |
| 187 |
bs->total_sectors, ret, errno, strerror(errno)); |
| 188 |
} |
| 189 |
|
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label__raw_read__success:
|
| 191 |
|
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return ret;
|
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} |
| 194 |
|
| 195 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
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const uint8_t *buf, int count) |
| 197 |
{
|
| 198 |
BDRVRawState *s = bs->opaque; |
| 199 |
int ret;
|
| 200 |
|
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ret = fd_open(bs); |
| 202 |
if (ret < 0) |
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return ret;
|
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|
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if (lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
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++(s->lseek_err_cnt); |
| 207 |
if(s->lseek_err_cnt) {
|
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DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
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PRId64 "] lseek failed : %d = %s\n",
|
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s->fd, bs->filename, offset, buf, count, |
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bs->total_sectors, errno, strerror(errno)); |
| 212 |
} |
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return -1; |
| 214 |
} |
| 215 |
s->lseek_err_cnt = 0;
|
| 216 |
|
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ret = write(s->fd, buf, count); |
| 218 |
if (ret == count)
|
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goto label__raw_write__success;
|
| 220 |
|
| 221 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
| 222 |
"] write failed %d : %d = %s\n",
|
| 223 |
s->fd, bs->filename, offset, buf, count, |
| 224 |
bs->total_sectors, ret, errno, strerror(errno)); |
| 225 |
|
| 226 |
label__raw_write__success:
|
| 227 |
|
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return ret;
|
| 229 |
} |
| 230 |
|
| 231 |
/***********************************************************/
|
| 232 |
/* Unix AIO using POSIX AIO */
|
| 233 |
|
| 234 |
typedef struct RawAIOCB { |
| 235 |
BlockDriverAIOCB common; |
| 236 |
struct aiocb aiocb;
|
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struct RawAIOCB *next;
|
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} RawAIOCB; |
| 239 |
|
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static int aio_sig_num = SIGUSR2; |
| 241 |
static RawAIOCB *first_aio; /* AIO issued */ |
| 242 |
static int aio_initialized = 0; |
| 243 |
|
| 244 |
static void aio_signal_handler(int signum) |
| 245 |
{
|
| 246 |
#ifndef QEMU_IMG
|
| 247 |
CPUState *env = cpu_single_env; |
| 248 |
if (env) {
|
| 249 |
/* stop the currently executing cpu because a timer occured */
|
| 250 |
cpu_interrupt(env, CPU_INTERRUPT_EXIT); |
| 251 |
#ifdef USE_KQEMU
|
| 252 |
if (env->kqemu_enabled) {
|
| 253 |
kqemu_cpu_interrupt(env); |
| 254 |
} |
| 255 |
#endif
|
| 256 |
} |
| 257 |
#endif
|
| 258 |
} |
| 259 |
|
| 260 |
void qemu_aio_init(void) |
| 261 |
{
|
| 262 |
struct sigaction act;
|
| 263 |
|
| 264 |
aio_initialized = 1;
|
| 265 |
|
| 266 |
sigfillset(&act.sa_mask); |
| 267 |
act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
| 268 |
act.sa_handler = aio_signal_handler; |
| 269 |
sigaction(aio_sig_num, &act, NULL);
|
| 270 |
|
| 271 |
#if defined(__GLIBC__) && defined(__linux__)
|
| 272 |
{
|
| 273 |
/* XXX: aio thread exit seems to hang on RedHat 9 and this init
|
| 274 |
seems to fix the problem. */
|
| 275 |
struct aioinit ai;
|
| 276 |
memset(&ai, 0, sizeof(ai)); |
| 277 |
ai.aio_threads = 1;
|
| 278 |
ai.aio_num = 1;
|
| 279 |
ai.aio_idle_time = 365 * 100000; |
| 280 |
aio_init(&ai); |
| 281 |
} |
| 282 |
#endif
|
| 283 |
} |
| 284 |
|
| 285 |
void qemu_aio_poll(void) |
| 286 |
{
|
| 287 |
RawAIOCB *acb, **pacb; |
| 288 |
int ret;
|
| 289 |
|
| 290 |
for(;;) {
|
| 291 |
pacb = &first_aio; |
| 292 |
for(;;) {
|
| 293 |
acb = *pacb; |
| 294 |
if (!acb)
|
| 295 |
goto the_end;
|
| 296 |
ret = aio_error(&acb->aiocb); |
| 297 |
if (ret == ECANCELED) {
|
| 298 |
/* remove the request */
|
| 299 |
*pacb = acb->next; |
| 300 |
qemu_aio_release(acb); |
| 301 |
} else if (ret != EINPROGRESS) { |
| 302 |
/* end of aio */
|
| 303 |
if (ret == 0) { |
| 304 |
ret = aio_return(&acb->aiocb); |
| 305 |
if (ret == acb->aiocb.aio_nbytes)
|
| 306 |
ret = 0;
|
| 307 |
else
|
| 308 |
ret = -EINVAL; |
| 309 |
} else {
|
| 310 |
ret = -ret; |
| 311 |
} |
| 312 |
/* remove the request */
|
| 313 |
*pacb = acb->next; |
| 314 |
/* call the callback */
|
| 315 |
acb->common.cb(acb->common.opaque, ret); |
| 316 |
qemu_aio_release(acb); |
| 317 |
break;
|
| 318 |
} else {
|
| 319 |
pacb = &acb->next; |
| 320 |
} |
| 321 |
} |
| 322 |
} |
| 323 |
the_end: ;
|
| 324 |
} |
| 325 |
|
| 326 |
/* Wait for all IO requests to complete. */
|
| 327 |
void qemu_aio_flush(void) |
| 328 |
{
|
| 329 |
qemu_aio_wait_start(); |
| 330 |
qemu_aio_poll(); |
| 331 |
while (first_aio) {
|
| 332 |
qemu_aio_wait(); |
| 333 |
} |
| 334 |
qemu_aio_wait_end(); |
| 335 |
} |
| 336 |
|
| 337 |
/* wait until at least one AIO was handled */
|
| 338 |
static sigset_t wait_oset;
|
| 339 |
|
| 340 |
void qemu_aio_wait_start(void) |
| 341 |
{
|
| 342 |
sigset_t set; |
| 343 |
|
| 344 |
if (!aio_initialized)
|
| 345 |
qemu_aio_init(); |
| 346 |
sigemptyset(&set); |
| 347 |
sigaddset(&set, aio_sig_num); |
| 348 |
sigprocmask(SIG_BLOCK, &set, &wait_oset); |
| 349 |
} |
| 350 |
|
| 351 |
void qemu_aio_wait(void) |
| 352 |
{
|
| 353 |
sigset_t set; |
| 354 |
int nb_sigs;
|
| 355 |
|
| 356 |
#ifndef QEMU_IMG
|
| 357 |
if (qemu_bh_poll())
|
| 358 |
return;
|
| 359 |
#endif
|
| 360 |
sigemptyset(&set); |
| 361 |
sigaddset(&set, aio_sig_num); |
| 362 |
sigwait(&set, &nb_sigs); |
| 363 |
qemu_aio_poll(); |
| 364 |
} |
| 365 |
|
| 366 |
void qemu_aio_wait_end(void) |
| 367 |
{
|
| 368 |
sigprocmask(SIG_SETMASK, &wait_oset, NULL);
|
| 369 |
} |
| 370 |
|
| 371 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
| 372 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
| 373 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 374 |
{
|
| 375 |
BDRVRawState *s = bs->opaque; |
| 376 |
RawAIOCB *acb; |
| 377 |
|
| 378 |
if (fd_open(bs) < 0) |
| 379 |
return NULL; |
| 380 |
|
| 381 |
acb = qemu_aio_get(bs, cb, opaque); |
| 382 |
if (!acb)
|
| 383 |
return NULL; |
| 384 |
acb->aiocb.aio_fildes = s->fd; |
| 385 |
acb->aiocb.aio_sigevent.sigev_signo = aio_sig_num; |
| 386 |
acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; |
| 387 |
acb->aiocb.aio_buf = buf; |
| 388 |
acb->aiocb.aio_nbytes = nb_sectors * 512;
|
| 389 |
acb->aiocb.aio_offset = sector_num * 512;
|
| 390 |
acb->next = first_aio; |
| 391 |
first_aio = acb; |
| 392 |
return acb;
|
| 393 |
} |
| 394 |
|
| 395 |
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
| 396 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
| 397 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 398 |
{
|
| 399 |
RawAIOCB *acb; |
| 400 |
|
| 401 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
| 402 |
if (!acb)
|
| 403 |
return NULL; |
| 404 |
if (aio_read(&acb->aiocb) < 0) { |
| 405 |
qemu_aio_release(acb); |
| 406 |
return NULL; |
| 407 |
} |
| 408 |
return &acb->common;
|
| 409 |
} |
| 410 |
|
| 411 |
static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
| 412 |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
| 413 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 414 |
{
|
| 415 |
RawAIOCB *acb; |
| 416 |
|
| 417 |
acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque); |
| 418 |
if (!acb)
|
| 419 |
return NULL; |
| 420 |
if (aio_write(&acb->aiocb) < 0) { |
| 421 |
qemu_aio_release(acb); |
| 422 |
return NULL; |
| 423 |
} |
| 424 |
return &acb->common;
|
| 425 |
} |
| 426 |
|
| 427 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
| 428 |
{
|
| 429 |
int ret;
|
| 430 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
| 431 |
RawAIOCB **pacb; |
| 432 |
|
| 433 |
ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
| 434 |
if (ret == AIO_NOTCANCELED) {
|
| 435 |
/* fail safe: if the aio could not be canceled, we wait for
|
| 436 |
it */
|
| 437 |
while (aio_error(&acb->aiocb) == EINPROGRESS);
|
| 438 |
} |
| 439 |
|
| 440 |
/* remove the callback from the queue */
|
| 441 |
pacb = &first_aio; |
| 442 |
for(;;) {
|
| 443 |
if (*pacb == NULL) { |
| 444 |
break;
|
| 445 |
} else if (*pacb == acb) { |
| 446 |
*pacb = acb->next; |
| 447 |
qemu_aio_release(acb); |
| 448 |
break;
|
| 449 |
} |
| 450 |
pacb = &acb->next; |
| 451 |
} |
| 452 |
} |
| 453 |
|
| 454 |
static void raw_close(BlockDriverState *bs) |
| 455 |
{
|
| 456 |
BDRVRawState *s = bs->opaque; |
| 457 |
if (s->fd >= 0) { |
| 458 |
close(s->fd); |
| 459 |
s->fd = -1;
|
| 460 |
} |
| 461 |
} |
| 462 |
|
| 463 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
| 464 |
{
|
| 465 |
BDRVRawState *s = bs->opaque; |
| 466 |
if (s->type != FTYPE_FILE)
|
| 467 |
return -ENOTSUP;
|
| 468 |
if (ftruncate(s->fd, offset) < 0) |
| 469 |
return -errno;
|
| 470 |
return 0; |
| 471 |
} |
| 472 |
|
| 473 |
static int64_t raw_getlength(BlockDriverState *bs)
|
| 474 |
{
|
| 475 |
BDRVRawState *s = bs->opaque; |
| 476 |
int fd = s->fd;
|
| 477 |
int64_t size; |
| 478 |
#ifdef _BSD
|
| 479 |
struct stat sb;
|
| 480 |
#endif
|
| 481 |
#ifdef __sun__
|
| 482 |
struct dk_minfo minfo;
|
| 483 |
int rv;
|
| 484 |
#endif
|
| 485 |
int ret;
|
| 486 |
|
| 487 |
ret = fd_open(bs); |
| 488 |
if (ret < 0) |
| 489 |
return ret;
|
| 490 |
|
| 491 |
#ifdef _BSD
|
| 492 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
| 493 |
#ifdef DIOCGMEDIASIZE
|
| 494 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
| 495 |
#endif
|
| 496 |
#ifdef CONFIG_COCOA
|
| 497 |
size = LONG_LONG_MAX; |
| 498 |
#else
|
| 499 |
size = lseek(fd, 0LL, SEEK_END);
|
| 500 |
#endif
|
| 501 |
} else
|
| 502 |
#endif
|
| 503 |
#ifdef __sun__
|
| 504 |
/*
|
| 505 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
| 506 |
*/
|
| 507 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
| 508 |
if ( rv != -1 ) { |
| 509 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
| 510 |
} else /* there are reports that lseek on some devices |
| 511 |
fails, but irc discussion said that contingency
|
| 512 |
on contingency was overkill */
|
| 513 |
#endif
|
| 514 |
{
|
| 515 |
size = lseek(fd, 0, SEEK_END);
|
| 516 |
} |
| 517 |
return size;
|
| 518 |
} |
| 519 |
|
| 520 |
static int raw_create(const char *filename, int64_t total_size, |
| 521 |
const char *backing_file, int flags) |
| 522 |
{
|
| 523 |
int fd;
|
| 524 |
|
| 525 |
if (flags || backing_file)
|
| 526 |
return -ENOTSUP;
|
| 527 |
|
| 528 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
| 529 |
0644);
|
| 530 |
if (fd < 0) |
| 531 |
return -EIO;
|
| 532 |
ftruncate(fd, total_size * 512);
|
| 533 |
close(fd); |
| 534 |
return 0; |
| 535 |
} |
| 536 |
|
| 537 |
static void raw_flush(BlockDriverState *bs) |
| 538 |
{
|
| 539 |
BDRVRawState *s = bs->opaque; |
| 540 |
fsync(s->fd); |
| 541 |
} |
| 542 |
|
| 543 |
BlockDriver bdrv_raw = {
|
| 544 |
"raw",
|
| 545 |
sizeof(BDRVRawState),
|
| 546 |
NULL, /* no probe for protocols */ |
| 547 |
raw_open, |
| 548 |
NULL,
|
| 549 |
NULL,
|
| 550 |
raw_close, |
| 551 |
raw_create, |
| 552 |
raw_flush, |
| 553 |
|
| 554 |
.bdrv_aio_read = raw_aio_read, |
| 555 |
.bdrv_aio_write = raw_aio_write, |
| 556 |
.bdrv_aio_cancel = raw_aio_cancel, |
| 557 |
.aiocb_size = sizeof(RawAIOCB),
|
| 558 |
.protocol_name = "file",
|
| 559 |
.bdrv_pread = raw_pread, |
| 560 |
.bdrv_pwrite = raw_pwrite, |
| 561 |
.bdrv_truncate = raw_truncate, |
| 562 |
.bdrv_getlength = raw_getlength, |
| 563 |
}; |
| 564 |
|
| 565 |
/***********************************************/
|
| 566 |
/* host device */
|
| 567 |
|
| 568 |
#ifdef CONFIG_COCOA
|
| 569 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
| 570 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
| 571 |
|
| 572 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
| 573 |
{
|
| 574 |
kern_return_t kernResult; |
| 575 |
mach_port_t masterPort; |
| 576 |
CFMutableDictionaryRef classesToMatch; |
| 577 |
|
| 578 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
| 579 |
if ( KERN_SUCCESS != kernResult ) {
|
| 580 |
printf( "IOMasterPort returned %d\n", kernResult );
|
| 581 |
} |
| 582 |
|
| 583 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
| 584 |
if ( classesToMatch == NULL ) { |
| 585 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
| 586 |
} else {
|
| 587 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
| 588 |
} |
| 589 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
| 590 |
if ( KERN_SUCCESS != kernResult )
|
| 591 |
{
|
| 592 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
| 593 |
} |
| 594 |
|
| 595 |
return kernResult;
|
| 596 |
} |
| 597 |
|
| 598 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
| 599 |
{
|
| 600 |
io_object_t nextMedia; |
| 601 |
kern_return_t kernResult = KERN_FAILURE; |
| 602 |
*bsdPath = '\0';
|
| 603 |
nextMedia = IOIteratorNext( mediaIterator ); |
| 604 |
if ( nextMedia )
|
| 605 |
{
|
| 606 |
CFTypeRef bsdPathAsCFString; |
| 607 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
| 608 |
if ( bsdPathAsCFString ) {
|
| 609 |
size_t devPathLength; |
| 610 |
strcpy( bsdPath, _PATH_DEV ); |
| 611 |
strcat( bsdPath, "r" );
|
| 612 |
devPathLength = strlen( bsdPath ); |
| 613 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
| 614 |
kernResult = KERN_SUCCESS; |
| 615 |
} |
| 616 |
CFRelease( bsdPathAsCFString ); |
| 617 |
} |
| 618 |
IOObjectRelease( nextMedia ); |
| 619 |
} |
| 620 |
|
| 621 |
return kernResult;
|
| 622 |
} |
| 623 |
|
| 624 |
#endif
|
| 625 |
|
| 626 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
| 627 |
{
|
| 628 |
BDRVRawState *s = bs->opaque; |
| 629 |
int fd, open_flags, ret;
|
| 630 |
|
| 631 |
#ifdef CONFIG_COCOA
|
| 632 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
| 633 |
kern_return_t kernResult; |
| 634 |
io_iterator_t mediaIterator; |
| 635 |
char bsdPath[ MAXPATHLEN ];
|
| 636 |
int fd;
|
| 637 |
|
| 638 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
| 639 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
| 640 |
|
| 641 |
if ( bsdPath[ 0 ] != '\0' ) { |
| 642 |
strcat(bsdPath,"s0");
|
| 643 |
/* some CDs don't have a partition 0 */
|
| 644 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
| 645 |
if (fd < 0) { |
| 646 |
bsdPath[strlen(bsdPath)-1] = '1'; |
| 647 |
} else {
|
| 648 |
close(fd); |
| 649 |
} |
| 650 |
filename = bsdPath; |
| 651 |
} |
| 652 |
|
| 653 |
if ( mediaIterator )
|
| 654 |
IOObjectRelease( mediaIterator ); |
| 655 |
} |
| 656 |
#endif
|
| 657 |
open_flags = O_BINARY; |
| 658 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
| 659 |
open_flags |= O_RDWR; |
| 660 |
} else {
|
| 661 |
open_flags |= O_RDONLY; |
| 662 |
bs->read_only = 1;
|
| 663 |
} |
| 664 |
|
| 665 |
s->type = FTYPE_FILE; |
| 666 |
#if defined(__linux__)
|
| 667 |
if (strstart(filename, "/dev/cd", NULL)) { |
| 668 |
/* open will not fail even if no CD is inserted */
|
| 669 |
open_flags |= O_NONBLOCK; |
| 670 |
s->type = FTYPE_CD; |
| 671 |
} else if (strstart(filename, "/dev/fd", NULL)) { |
| 672 |
s->type = FTYPE_FD; |
| 673 |
s->fd_open_flags = open_flags; |
| 674 |
/* open will not fail even if no floppy is inserted */
|
| 675 |
open_flags |= O_NONBLOCK; |
| 676 |
} |
| 677 |
#endif
|
| 678 |
fd = open(filename, open_flags, 0644);
|
| 679 |
if (fd < 0) { |
| 680 |
ret = -errno; |
| 681 |
if (ret == -EROFS)
|
| 682 |
ret = -EACCES; |
| 683 |
return ret;
|
| 684 |
} |
| 685 |
s->fd = fd; |
| 686 |
#if defined(__linux__)
|
| 687 |
/* close fd so that we can reopen it as needed */
|
| 688 |
if (s->type == FTYPE_FD) {
|
| 689 |
close(s->fd); |
| 690 |
s->fd = -1;
|
| 691 |
s->fd_media_changed = 1;
|
| 692 |
} |
| 693 |
#endif
|
| 694 |
return 0; |
| 695 |
} |
| 696 |
|
| 697 |
#if defined(__linux__) && !defined(QEMU_IMG)
|
| 698 |
|
| 699 |
/* Note: we do not have a reliable method to detect if the floppy is
|
| 700 |
present. The current method is to try to open the floppy at every
|
| 701 |
I/O and to keep it opened during a few hundreds of ms. */
|
| 702 |
static int fd_open(BlockDriverState *bs) |
| 703 |
{
|
| 704 |
BDRVRawState *s = bs->opaque; |
| 705 |
int last_media_present;
|
| 706 |
|
| 707 |
if (s->type != FTYPE_FD)
|
| 708 |
return 0; |
| 709 |
last_media_present = (s->fd >= 0);
|
| 710 |
if (s->fd >= 0 && |
| 711 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
|
| 712 |
close(s->fd); |
| 713 |
s->fd = -1;
|
| 714 |
#ifdef DEBUG_FLOPPY
|
| 715 |
printf("Floppy closed\n");
|
| 716 |
#endif
|
| 717 |
} |
| 718 |
if (s->fd < 0) { |
| 719 |
if (s->fd_got_error &&
|
| 720 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
|
| 721 |
#ifdef DEBUG_FLOPPY
|
| 722 |
printf("No floppy (open delayed)\n");
|
| 723 |
#endif
|
| 724 |
return -EIO;
|
| 725 |
} |
| 726 |
s->fd = open(bs->filename, s->fd_open_flags); |
| 727 |
if (s->fd < 0) { |
| 728 |
s->fd_error_time = qemu_get_clock(rt_clock); |
| 729 |
s->fd_got_error = 1;
|
| 730 |
if (last_media_present)
|
| 731 |
s->fd_media_changed = 1;
|
| 732 |
#ifdef DEBUG_FLOPPY
|
| 733 |
printf("No floppy\n");
|
| 734 |
#endif
|
| 735 |
return -EIO;
|
| 736 |
} |
| 737 |
#ifdef DEBUG_FLOPPY
|
| 738 |
printf("Floppy opened\n");
|
| 739 |
#endif
|
| 740 |
} |
| 741 |
if (!last_media_present)
|
| 742 |
s->fd_media_changed = 1;
|
| 743 |
s->fd_open_time = qemu_get_clock(rt_clock); |
| 744 |
s->fd_got_error = 0;
|
| 745 |
return 0; |
| 746 |
} |
| 747 |
#else
|
| 748 |
static int fd_open(BlockDriverState *bs) |
| 749 |
{
|
| 750 |
return 0; |
| 751 |
} |
| 752 |
#endif
|
| 753 |
|
| 754 |
#if defined(__linux__)
|
| 755 |
|
| 756 |
static int raw_is_inserted(BlockDriverState *bs) |
| 757 |
{
|
| 758 |
BDRVRawState *s = bs->opaque; |
| 759 |
int ret;
|
| 760 |
|
| 761 |
switch(s->type) {
|
| 762 |
case FTYPE_CD:
|
| 763 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
| 764 |
if (ret == CDS_DISC_OK)
|
| 765 |
return 1; |
| 766 |
else
|
| 767 |
return 0; |
| 768 |
break;
|
| 769 |
case FTYPE_FD:
|
| 770 |
ret = fd_open(bs); |
| 771 |
return (ret >= 0); |
| 772 |
default:
|
| 773 |
return 1; |
| 774 |
} |
| 775 |
} |
| 776 |
|
| 777 |
/* currently only used by fdc.c, but a CD version would be good too */
|
| 778 |
static int raw_media_changed(BlockDriverState *bs) |
| 779 |
{
|
| 780 |
BDRVRawState *s = bs->opaque; |
| 781 |
|
| 782 |
switch(s->type) {
|
| 783 |
case FTYPE_FD:
|
| 784 |
{
|
| 785 |
int ret;
|
| 786 |
/* XXX: we do not have a true media changed indication. It
|
| 787 |
does not work if the floppy is changed without trying
|
| 788 |
to read it */
|
| 789 |
fd_open(bs); |
| 790 |
ret = s->fd_media_changed; |
| 791 |
s->fd_media_changed = 0;
|
| 792 |
#ifdef DEBUG_FLOPPY
|
| 793 |
printf("Floppy changed=%d\n", ret);
|
| 794 |
#endif
|
| 795 |
return ret;
|
| 796 |
} |
| 797 |
default:
|
| 798 |
return -ENOTSUP;
|
| 799 |
} |
| 800 |
} |
| 801 |
|
| 802 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
| 803 |
{
|
| 804 |
BDRVRawState *s = bs->opaque; |
| 805 |
|
| 806 |
switch(s->type) {
|
| 807 |
case FTYPE_CD:
|
| 808 |
if (eject_flag) {
|
| 809 |
if (ioctl (s->fd, CDROMEJECT, NULL) < 0) |
| 810 |
perror("CDROMEJECT");
|
| 811 |
} else {
|
| 812 |
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0) |
| 813 |
perror("CDROMEJECT");
|
| 814 |
} |
| 815 |
break;
|
| 816 |
case FTYPE_FD:
|
| 817 |
{
|
| 818 |
int fd;
|
| 819 |
if (s->fd >= 0) { |
| 820 |
close(s->fd); |
| 821 |
s->fd = -1;
|
| 822 |
} |
| 823 |
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK); |
| 824 |
if (fd >= 0) { |
| 825 |
if (ioctl(fd, FDEJECT, 0) < 0) |
| 826 |
perror("FDEJECT");
|
| 827 |
close(fd); |
| 828 |
} |
| 829 |
} |
| 830 |
break;
|
| 831 |
default:
|
| 832 |
return -ENOTSUP;
|
| 833 |
} |
| 834 |
return 0; |
| 835 |
} |
| 836 |
|
| 837 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
| 838 |
{
|
| 839 |
BDRVRawState *s = bs->opaque; |
| 840 |
|
| 841 |
switch(s->type) {
|
| 842 |
case FTYPE_CD:
|
| 843 |
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) { |
| 844 |
/* Note: an error can happen if the distribution automatically
|
| 845 |
mounts the CD-ROM */
|
| 846 |
// perror("CDROM_LOCKDOOR");
|
| 847 |
} |
| 848 |
break;
|
| 849 |
default:
|
| 850 |
return -ENOTSUP;
|
| 851 |
} |
| 852 |
return 0; |
| 853 |
} |
| 854 |
|
| 855 |
#else
|
| 856 |
|
| 857 |
static int raw_is_inserted(BlockDriverState *bs) |
| 858 |
{
|
| 859 |
return 1; |
| 860 |
} |
| 861 |
|
| 862 |
static int raw_media_changed(BlockDriverState *bs) |
| 863 |
{
|
| 864 |
return -ENOTSUP;
|
| 865 |
} |
| 866 |
|
| 867 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
| 868 |
{
|
| 869 |
return -ENOTSUP;
|
| 870 |
} |
| 871 |
|
| 872 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
| 873 |
{
|
| 874 |
return -ENOTSUP;
|
| 875 |
} |
| 876 |
|
| 877 |
#endif /* !linux */ |
| 878 |
|
| 879 |
BlockDriver bdrv_host_device = {
|
| 880 |
"host_device",
|
| 881 |
sizeof(BDRVRawState),
|
| 882 |
NULL, /* no probe for protocols */ |
| 883 |
hdev_open, |
| 884 |
NULL,
|
| 885 |
NULL,
|
| 886 |
raw_close, |
| 887 |
NULL,
|
| 888 |
raw_flush, |
| 889 |
|
| 890 |
.bdrv_aio_read = raw_aio_read, |
| 891 |
.bdrv_aio_write = raw_aio_write, |
| 892 |
.bdrv_aio_cancel = raw_aio_cancel, |
| 893 |
.aiocb_size = sizeof(RawAIOCB),
|
| 894 |
.bdrv_pread = raw_pread, |
| 895 |
.bdrv_pwrite = raw_pwrite, |
| 896 |
.bdrv_getlength = raw_getlength, |
| 897 |
|
| 898 |
/* removable device support */
|
| 899 |
.bdrv_is_inserted = raw_is_inserted, |
| 900 |
.bdrv_media_changed = raw_media_changed, |
| 901 |
.bdrv_eject = raw_eject, |
| 902 |
.bdrv_set_locked = raw_set_locked, |
| 903 |
}; |
| 904 |
|
| 905 |
#else /* _WIN32 */ |
| 906 |
|
| 907 |
/* XXX: use another file ? */
|
| 908 |
#include <winioctl.h> |
| 909 |
|
| 910 |
#define FTYPE_FILE 0 |
| 911 |
#define FTYPE_CD 1 |
| 912 |
#define FTYPE_HARDDISK 2 |
| 913 |
|
| 914 |
typedef struct BDRVRawState { |
| 915 |
HANDLE hfile; |
| 916 |
int type;
|
| 917 |
char drive_path[16]; /* format: "d:\" */ |
| 918 |
} BDRVRawState; |
| 919 |
|
| 920 |
typedef struct RawAIOCB { |
| 921 |
BlockDriverAIOCB common; |
| 922 |
HANDLE hEvent; |
| 923 |
OVERLAPPED ov; |
| 924 |
int count;
|
| 925 |
} RawAIOCB; |
| 926 |
|
| 927 |
int qemu_ftruncate64(int fd, int64_t length) |
| 928 |
{
|
| 929 |
LARGE_INTEGER li; |
| 930 |
LONG high; |
| 931 |
HANDLE h; |
| 932 |
BOOL res; |
| 933 |
|
| 934 |
if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0) |
| 935 |
return -1; |
| 936 |
|
| 937 |
h = (HANDLE)_get_osfhandle(fd); |
| 938 |
|
| 939 |
/* get current position, ftruncate do not change position */
|
| 940 |
li.HighPart = 0;
|
| 941 |
li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
|
| 942 |
if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR) |
| 943 |
return -1; |
| 944 |
|
| 945 |
high = length >> 32;
|
| 946 |
if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
|
| 947 |
return -1; |
| 948 |
res = SetEndOfFile(h); |
| 949 |
|
| 950 |
/* back to old position */
|
| 951 |
SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN); |
| 952 |
return res ? 0 : -1; |
| 953 |
} |
| 954 |
|
| 955 |
static int set_sparse(int fd) |
| 956 |
{
|
| 957 |
DWORD returned; |
| 958 |
return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE, |
| 959 |
NULL, 0, NULL, 0, &returned, NULL); |
| 960 |
} |
| 961 |
|
| 962 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
| 963 |
{
|
| 964 |
BDRVRawState *s = bs->opaque; |
| 965 |
int access_flags, create_flags;
|
| 966 |
DWORD overlapped; |
| 967 |
|
| 968 |
s->type = FTYPE_FILE; |
| 969 |
|
| 970 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
| 971 |
access_flags = GENERIC_READ | GENERIC_WRITE; |
| 972 |
} else {
|
| 973 |
access_flags = GENERIC_READ; |
| 974 |
} |
| 975 |
if (flags & BDRV_O_CREAT) {
|
| 976 |
create_flags = CREATE_ALWAYS; |
| 977 |
} else {
|
| 978 |
create_flags = OPEN_EXISTING; |
| 979 |
} |
| 980 |
#ifdef QEMU_IMG
|
| 981 |
overlapped = FILE_ATTRIBUTE_NORMAL; |
| 982 |
#else
|
| 983 |
overlapped = FILE_FLAG_OVERLAPPED; |
| 984 |
#endif
|
| 985 |
s->hfile = CreateFile(filename, access_flags, |
| 986 |
FILE_SHARE_READ, NULL,
|
| 987 |
create_flags, overlapped, NULL);
|
| 988 |
if (s->hfile == INVALID_HANDLE_VALUE) {
|
| 989 |
int err = GetLastError();
|
| 990 |
|
| 991 |
if (err == ERROR_ACCESS_DENIED)
|
| 992 |
return -EACCES;
|
| 993 |
return -1; |
| 994 |
} |
| 995 |
return 0; |
| 996 |
} |
| 997 |
|
| 998 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
| 999 |
uint8_t *buf, int count)
|
| 1000 |
{
|
| 1001 |
BDRVRawState *s = bs->opaque; |
| 1002 |
OVERLAPPED ov; |
| 1003 |
DWORD ret_count; |
| 1004 |
int ret;
|
| 1005 |
|
| 1006 |
memset(&ov, 0, sizeof(ov)); |
| 1007 |
ov.Offset = offset; |
| 1008 |
ov.OffsetHigh = offset >> 32;
|
| 1009 |
ret = ReadFile(s->hfile, buf, count, &ret_count, &ov); |
| 1010 |
if (!ret) {
|
| 1011 |
ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE); |
| 1012 |
if (!ret)
|
| 1013 |
return -EIO;
|
| 1014 |
else
|
| 1015 |
return ret_count;
|
| 1016 |
} |
| 1017 |
return ret_count;
|
| 1018 |
} |
| 1019 |
|
| 1020 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
| 1021 |
const uint8_t *buf, int count) |
| 1022 |
{
|
| 1023 |
BDRVRawState *s = bs->opaque; |
| 1024 |
OVERLAPPED ov; |
| 1025 |
DWORD ret_count; |
| 1026 |
int ret;
|
| 1027 |
|
| 1028 |
memset(&ov, 0, sizeof(ov)); |
| 1029 |
ov.Offset = offset; |
| 1030 |
ov.OffsetHigh = offset >> 32;
|
| 1031 |
ret = WriteFile(s->hfile, buf, count, &ret_count, &ov); |
| 1032 |
if (!ret) {
|
| 1033 |
ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE); |
| 1034 |
if (!ret)
|
| 1035 |
return -EIO;
|
| 1036 |
else
|
| 1037 |
return ret_count;
|
| 1038 |
} |
| 1039 |
return ret_count;
|
| 1040 |
} |
| 1041 |
|
| 1042 |
#if 0
|
| 1043 |
#ifndef QEMU_IMG
|
| 1044 |
static void raw_aio_cb(void *opaque)
|
| 1045 |
{
|
| 1046 |
RawAIOCB *acb = opaque;
|
| 1047 |
BlockDriverState *bs = acb->common.bs;
|
| 1048 |
BDRVRawState *s = bs->opaque;
|
| 1049 |
DWORD ret_count;
|
| 1050 |
int ret;
|
| 1051 |
|
| 1052 |
ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
|
| 1053 |
if (!ret || ret_count != acb->count) {
|
| 1054 |
acb->common.cb(acb->common.opaque, -EIO);
|
| 1055 |
} else {
|
| 1056 |
acb->common.cb(acb->common.opaque, 0);
|
| 1057 |
}
|
| 1058 |
}
|
| 1059 |
#endif
|
| 1060 |
|
| 1061 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
| 1062 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
| 1063 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 1064 |
{
|
| 1065 |
RawAIOCB *acb; |
| 1066 |
int64_t offset; |
| 1067 |
|
| 1068 |
acb = qemu_aio_get(bs, cb, opaque); |
| 1069 |
if (acb->hEvent) {
|
| 1070 |
acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); |
| 1071 |
if (!acb->hEvent) {
|
| 1072 |
qemu_aio_release(acb); |
| 1073 |
return NULL; |
| 1074 |
} |
| 1075 |
} |
| 1076 |
memset(&acb->ov, 0, sizeof(acb->ov)); |
| 1077 |
offset = sector_num * 512;
|
| 1078 |
acb->ov.Offset = offset; |
| 1079 |
acb->ov.OffsetHigh = offset >> 32;
|
| 1080 |
acb->ov.hEvent = acb->hEvent; |
| 1081 |
acb->count = nb_sectors * 512;
|
| 1082 |
#ifndef QEMU_IMG
|
| 1083 |
qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb); |
| 1084 |
#endif
|
| 1085 |
return acb;
|
| 1086 |
} |
| 1087 |
|
| 1088 |
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
| 1089 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
| 1090 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 1091 |
{
|
| 1092 |
BDRVRawState *s = bs->opaque; |
| 1093 |
RawAIOCB *acb; |
| 1094 |
int ret;
|
| 1095 |
|
| 1096 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
| 1097 |
if (!acb)
|
| 1098 |
return NULL; |
| 1099 |
ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
|
| 1100 |
if (!ret) {
|
| 1101 |
qemu_aio_release(acb); |
| 1102 |
return NULL; |
| 1103 |
} |
| 1104 |
#ifdef QEMU_IMG
|
| 1105 |
qemu_aio_release(acb); |
| 1106 |
#endif
|
| 1107 |
return (BlockDriverAIOCB *)acb;
|
| 1108 |
} |
| 1109 |
|
| 1110 |
static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
| 1111 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
| 1112 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 1113 |
{
|
| 1114 |
BDRVRawState *s = bs->opaque; |
| 1115 |
RawAIOCB *acb; |
| 1116 |
int ret;
|
| 1117 |
|
| 1118 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
| 1119 |
if (!acb)
|
| 1120 |
return NULL; |
| 1121 |
ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
|
| 1122 |
if (!ret) {
|
| 1123 |
qemu_aio_release(acb); |
| 1124 |
return NULL; |
| 1125 |
} |
| 1126 |
#ifdef QEMU_IMG
|
| 1127 |
qemu_aio_release(acb); |
| 1128 |
#endif
|
| 1129 |
return (BlockDriverAIOCB *)acb;
|
| 1130 |
} |
| 1131 |
|
| 1132 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
| 1133 |
{
|
| 1134 |
#ifndef QEMU_IMG
|
| 1135 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
| 1136 |
BlockDriverState *bs = acb->common.bs; |
| 1137 |
BDRVRawState *s = bs->opaque; |
| 1138 |
|
| 1139 |
qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb); |
| 1140 |
/* XXX: if more than one async I/O it is not correct */
|
| 1141 |
CancelIo(s->hfile); |
| 1142 |
qemu_aio_release(acb); |
| 1143 |
#endif
|
| 1144 |
} |
| 1145 |
#endif /* #if 0 */ |
| 1146 |
|
| 1147 |
static void raw_flush(BlockDriverState *bs) |
| 1148 |
{
|
| 1149 |
BDRVRawState *s = bs->opaque; |
| 1150 |
FlushFileBuffers(s->hfile); |
| 1151 |
} |
| 1152 |
|
| 1153 |
static void raw_close(BlockDriverState *bs) |
| 1154 |
{
|
| 1155 |
BDRVRawState *s = bs->opaque; |
| 1156 |
CloseHandle(s->hfile); |
| 1157 |
} |
| 1158 |
|
| 1159 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
| 1160 |
{
|
| 1161 |
BDRVRawState *s = bs->opaque; |
| 1162 |
DWORD low, high; |
| 1163 |
|
| 1164 |
low = offset; |
| 1165 |
high = offset >> 32;
|
| 1166 |
if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
|
| 1167 |
return -EIO;
|
| 1168 |
if (!SetEndOfFile(s->hfile))
|
| 1169 |
return -EIO;
|
| 1170 |
return 0; |
| 1171 |
} |
| 1172 |
|
| 1173 |
static int64_t raw_getlength(BlockDriverState *bs)
|
| 1174 |
{
|
| 1175 |
BDRVRawState *s = bs->opaque; |
| 1176 |
LARGE_INTEGER l; |
| 1177 |
ULARGE_INTEGER available, total, total_free; |
| 1178 |
DISK_GEOMETRY_EX dg; |
| 1179 |
DWORD count; |
| 1180 |
BOOL status; |
| 1181 |
|
| 1182 |
switch(s->type) {
|
| 1183 |
case FTYPE_FILE:
|
| 1184 |
l.LowPart = GetFileSize(s->hfile, &l.HighPart); |
| 1185 |
if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR) |
| 1186 |
return -EIO;
|
| 1187 |
break;
|
| 1188 |
case FTYPE_CD:
|
| 1189 |
if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
|
| 1190 |
return -EIO;
|
| 1191 |
l.QuadPart = total.QuadPart; |
| 1192 |
break;
|
| 1193 |
case FTYPE_HARDDISK:
|
| 1194 |
status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX, |
| 1195 |
NULL, 0, &dg, sizeof(dg), &count, NULL); |
| 1196 |
if (status != 0) { |
| 1197 |
l = dg.DiskSize; |
| 1198 |
} |
| 1199 |
break;
|
| 1200 |
default:
|
| 1201 |
return -EIO;
|
| 1202 |
} |
| 1203 |
return l.QuadPart;
|
| 1204 |
} |
| 1205 |
|
| 1206 |
static int raw_create(const char *filename, int64_t total_size, |
| 1207 |
const char *backing_file, int flags) |
| 1208 |
{
|
| 1209 |
int fd;
|
| 1210 |
|
| 1211 |
if (flags || backing_file)
|
| 1212 |
return -ENOTSUP;
|
| 1213 |
|
| 1214 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
| 1215 |
0644);
|
| 1216 |
if (fd < 0) |
| 1217 |
return -EIO;
|
| 1218 |
set_sparse(fd); |
| 1219 |
ftruncate(fd, total_size * 512);
|
| 1220 |
close(fd); |
| 1221 |
return 0; |
| 1222 |
} |
| 1223 |
|
| 1224 |
void qemu_aio_init(void) |
| 1225 |
{
|
| 1226 |
} |
| 1227 |
|
| 1228 |
void qemu_aio_poll(void) |
| 1229 |
{
|
| 1230 |
} |
| 1231 |
|
| 1232 |
void qemu_aio_flush(void) |
| 1233 |
{
|
| 1234 |
} |
| 1235 |
|
| 1236 |
void qemu_aio_wait_start(void) |
| 1237 |
{
|
| 1238 |
} |
| 1239 |
|
| 1240 |
void qemu_aio_wait(void) |
| 1241 |
{
|
| 1242 |
#ifndef QEMU_IMG
|
| 1243 |
qemu_bh_poll(); |
| 1244 |
#endif
|
| 1245 |
} |
| 1246 |
|
| 1247 |
void qemu_aio_wait_end(void) |
| 1248 |
{
|
| 1249 |
} |
| 1250 |
|
| 1251 |
BlockDriver bdrv_raw = {
|
| 1252 |
"raw",
|
| 1253 |
sizeof(BDRVRawState),
|
| 1254 |
NULL, /* no probe for protocols */ |
| 1255 |
raw_open, |
| 1256 |
NULL,
|
| 1257 |
NULL,
|
| 1258 |
raw_close, |
| 1259 |
raw_create, |
| 1260 |
raw_flush, |
| 1261 |
|
| 1262 |
#if 0
|
| 1263 |
.bdrv_aio_read = raw_aio_read,
|
| 1264 |
.bdrv_aio_write = raw_aio_write,
|
| 1265 |
.bdrv_aio_cancel = raw_aio_cancel,
|
| 1266 |
.aiocb_size = sizeof(RawAIOCB);
|
| 1267 |
#endif
|
| 1268 |
.protocol_name = "file",
|
| 1269 |
.bdrv_pread = raw_pread, |
| 1270 |
.bdrv_pwrite = raw_pwrite, |
| 1271 |
.bdrv_truncate = raw_truncate, |
| 1272 |
.bdrv_getlength = raw_getlength, |
| 1273 |
}; |
| 1274 |
|
| 1275 |
/***********************************************/
|
| 1276 |
/* host device */
|
| 1277 |
|
| 1278 |
static int find_cdrom(char *cdrom_name, int cdrom_name_size) |
| 1279 |
{
|
| 1280 |
char drives[256], *pdrv = drives; |
| 1281 |
UINT type; |
| 1282 |
|
| 1283 |
memset(drives, 0, sizeof(drives)); |
| 1284 |
GetLogicalDriveStrings(sizeof(drives), drives);
|
| 1285 |
while(pdrv[0] != '\0') { |
| 1286 |
type = GetDriveType(pdrv); |
| 1287 |
switch(type) {
|
| 1288 |
case DRIVE_CDROM:
|
| 1289 |
snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]); |
| 1290 |
return 0; |
| 1291 |
break;
|
| 1292 |
} |
| 1293 |
pdrv += lstrlen(pdrv) + 1;
|
| 1294 |
} |
| 1295 |
return -1; |
| 1296 |
} |
| 1297 |
|
| 1298 |
static int find_device_type(BlockDriverState *bs, const char *filename) |
| 1299 |
{
|
| 1300 |
BDRVRawState *s = bs->opaque; |
| 1301 |
UINT type; |
| 1302 |
const char *p; |
| 1303 |
|
| 1304 |
if (strstart(filename, "\\\\.\\", &p) || |
| 1305 |
strstart(filename, "//./", &p)) {
|
| 1306 |
if (stristart(p, "PhysicalDrive", NULL)) |
| 1307 |
return FTYPE_HARDDISK;
|
| 1308 |
snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]); |
| 1309 |
type = GetDriveType(s->drive_path); |
| 1310 |
if (type == DRIVE_CDROM)
|
| 1311 |
return FTYPE_CD;
|
| 1312 |
else
|
| 1313 |
return FTYPE_FILE;
|
| 1314 |
} else {
|
| 1315 |
return FTYPE_FILE;
|
| 1316 |
} |
| 1317 |
} |
| 1318 |
|
| 1319 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
| 1320 |
{
|
| 1321 |
BDRVRawState *s = bs->opaque; |
| 1322 |
int access_flags, create_flags;
|
| 1323 |
DWORD overlapped; |
| 1324 |
char device_name[64]; |
| 1325 |
|
| 1326 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
| 1327 |
if (find_cdrom(device_name, sizeof(device_name)) < 0) |
| 1328 |
return -ENOENT;
|
| 1329 |
filename = device_name; |
| 1330 |
} else {
|
| 1331 |
/* transform drive letters into device name */
|
| 1332 |
if (((filename[0] >= 'a' && filename[0] <= 'z') || |
| 1333 |
(filename[0] >= 'A' && filename[0] <= 'Z')) && |
| 1334 |
filename[1] == ':' && filename[2] == '\0') { |
| 1335 |
snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]); |
| 1336 |
filename = device_name; |
| 1337 |
} |
| 1338 |
} |
| 1339 |
s->type = find_device_type(bs, filename); |
| 1340 |
|
| 1341 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
| 1342 |
access_flags = GENERIC_READ | GENERIC_WRITE; |
| 1343 |
} else {
|
| 1344 |
access_flags = GENERIC_READ; |
| 1345 |
} |
| 1346 |
create_flags = OPEN_EXISTING; |
| 1347 |
|
| 1348 |
#ifdef QEMU_IMG
|
| 1349 |
overlapped = FILE_ATTRIBUTE_NORMAL; |
| 1350 |
#else
|
| 1351 |
overlapped = FILE_FLAG_OVERLAPPED; |
| 1352 |
#endif
|
| 1353 |
s->hfile = CreateFile(filename, access_flags, |
| 1354 |
FILE_SHARE_READ, NULL,
|
| 1355 |
create_flags, overlapped, NULL);
|
| 1356 |
if (s->hfile == INVALID_HANDLE_VALUE) {
|
| 1357 |
int err = GetLastError();
|
| 1358 |
|
| 1359 |
if (err == ERROR_ACCESS_DENIED)
|
| 1360 |
return -EACCES;
|
| 1361 |
return -1; |
| 1362 |
} |
| 1363 |
return 0; |
| 1364 |
} |
| 1365 |
|
| 1366 |
#if 0
|
| 1367 |
/***********************************************/
|
| 1368 |
/* removable device additional commands */
|
| 1369 |
|
| 1370 |
static int raw_is_inserted(BlockDriverState *bs)
|
| 1371 |
{
|
| 1372 |
return 1;
|
| 1373 |
}
|
| 1374 |
|
| 1375 |
static int raw_media_changed(BlockDriverState *bs)
|
| 1376 |
{
|
| 1377 |
return -ENOTSUP;
|
| 1378 |
}
|
| 1379 |
|
| 1380 |
static int raw_eject(BlockDriverState *bs, int eject_flag)
|
| 1381 |
{
|
| 1382 |
DWORD ret_count;
|
| 1383 |
|
| 1384 |
if (s->type == FTYPE_FILE)
|
| 1385 |
return -ENOTSUP;
|
| 1386 |
if (eject_flag) {
|
| 1387 |
DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
|
| 1388 |
NULL, 0, NULL, 0, &lpBytesReturned, NULL);
|
| 1389 |
} else {
|
| 1390 |
DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
|
| 1391 |
NULL, 0, NULL, 0, &lpBytesReturned, NULL);
|
| 1392 |
}
|
| 1393 |
}
|
| 1394 |
|
| 1395 |
static int raw_set_locked(BlockDriverState *bs, int locked)
|
| 1396 |
{
|
| 1397 |
return -ENOTSUP;
|
| 1398 |
}
|
| 1399 |
#endif
|
| 1400 |
|
| 1401 |
BlockDriver bdrv_host_device = {
|
| 1402 |
"host_device",
|
| 1403 |
sizeof(BDRVRawState),
|
| 1404 |
NULL, /* no probe for protocols */ |
| 1405 |
hdev_open, |
| 1406 |
NULL,
|
| 1407 |
NULL,
|
| 1408 |
raw_close, |
| 1409 |
NULL,
|
| 1410 |
raw_flush, |
| 1411 |
|
| 1412 |
#if 0
|
| 1413 |
.bdrv_aio_read = raw_aio_read,
|
| 1414 |
.bdrv_aio_write = raw_aio_write,
|
| 1415 |
.bdrv_aio_cancel = raw_aio_cancel,
|
| 1416 |
.aiocb_size = sizeof(RawAIOCB);
|
| 1417 |
#endif
|
| 1418 |
.bdrv_pread = raw_pread, |
| 1419 |
.bdrv_pwrite = raw_pwrite, |
| 1420 |
.bdrv_getlength = raw_getlength, |
| 1421 |
}; |
| 1422 |
#endif /* _WIN32 */ |