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/*
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* Block driver for RAW files (posix)
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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
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* 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
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* 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
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* 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
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* THE SOFTWARE.
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*/
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#include "qemu-common.h" |
25 |
#ifndef QEMU_IMG
|
26 |
#include "qemu-timer.h" |
27 |
#include "exec-all.h" |
28 |
#endif
|
29 |
#include "block_int.h" |
30 |
#include <assert.h> |
31 |
#include <aio.h> |
32 |
|
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__
|
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#define _POSIX_PTHREAD_SEMANTICS 1 |
47 |
#include <signal.h> |
48 |
#include <sys/dkio.h> |
49 |
#endif
|
50 |
#ifdef __linux__
|
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#include <sys/ioctl.h> |
52 |
#include <linux/cdrom.h> |
53 |
#include <linux/fd.h> |
54 |
#endif
|
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#ifdef __FreeBSD__
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#include <sys/disk.h> |
57 |
#endif
|
58 |
|
59 |
//#define DEBUG_FLOPPY
|
60 |
|
61 |
//#define DEBUG_BLOCK
|
62 |
#if defined(DEBUG_BLOCK) && !defined(QEMU_IMG)
|
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#define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \ |
64 |
{ fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0) |
65 |
#else
|
66 |
#define DEBUG_BLOCK_PRINT(formatCstr, args...)
|
67 |
#endif
|
68 |
|
69 |
#define FTYPE_FILE 0 |
70 |
#define FTYPE_CD 1 |
71 |
#define FTYPE_FD 2 |
72 |
|
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/* if the FD is not accessed during that time (in ms), we try to
|
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reopen it to see if the disk has been changed */
|
75 |
#define FD_OPEN_TIMEOUT 1000 |
76 |
|
77 |
typedef struct BDRVRawState { |
78 |
int fd;
|
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int type;
|
80 |
unsigned int lseek_err_cnt; |
81 |
#if defined(__linux__)
|
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/* linux floppy specific */
|
83 |
int fd_open_flags;
|
84 |
int64_t fd_open_time; |
85 |
int64_t fd_error_time; |
86 |
int fd_got_error;
|
87 |
int fd_media_changed;
|
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#endif
|
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} BDRVRawState; |
90 |
|
91 |
static int fd_open(BlockDriverState *bs); |
92 |
|
93 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
94 |
{ |
95 |
BDRVRawState *s = bs->opaque; |
96 |
int fd, open_flags, ret;
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|
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s->lseek_err_cnt = 0;
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|
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open_flags = O_BINARY; |
101 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
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open_flags |= O_RDWR; |
103 |
} else {
|
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open_flags |= O_RDONLY; |
105 |
bs->read_only = 1;
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} |
107 |
if (flags & BDRV_O_CREAT)
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open_flags |= O_CREAT | O_TRUNC; |
109 |
#ifdef O_DIRECT
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if (flags & BDRV_O_DIRECT)
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open_flags |= O_DIRECT; |
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#endif
|
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|
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s->type = FTYPE_FILE; |
115 |
|
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fd = open(filename, open_flags, 0644);
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if (fd < 0) { |
118 |
ret = -errno; |
119 |
if (ret == -EROFS)
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ret = -EACCES; |
121 |
return ret;
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} |
123 |
s->fd = fd; |
124 |
return 0; |
125 |
} |
126 |
|
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/* XXX: use host sector size if necessary with:
|
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#ifdef DIOCGSECTORSIZE
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{
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unsigned int sectorsize = 512;
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if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
|
132 |
sectorsize > bufsize)
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bufsize = sectorsize;
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}
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#endif
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#ifdef CONFIG_COCOA
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u_int32_t blockSize = 512;
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if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
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bufsize = blockSize;
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}
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#endif
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*/
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143 |
|
144 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
145 |
uint8_t *buf, int count)
|
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{ |
147 |
BDRVRawState *s = bs->opaque; |
148 |
int ret;
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149 |
|
150 |
ret = fd_open(bs); |
151 |
if (ret < 0) |
152 |
return ret;
|
153 |
|
154 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
155 |
++(s->lseek_err_cnt); |
156 |
if(s->lseek_err_cnt <= 10) { |
157 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
158 |
"] lseek failed : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
160 |
bs->total_sectors, errno, strerror(errno)); |
161 |
} |
162 |
return -1; |
163 |
} |
164 |
s->lseek_err_cnt=0;
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165 |
|
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ret = read(s->fd, buf, count); |
167 |
if (ret == count)
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goto label__raw_read__success;
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169 |
|
170 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
171 |
"] read failed %d : %d = %s\n",
|
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s->fd, bs->filename, offset, buf, count, |
173 |
bs->total_sectors, ret, errno, strerror(errno)); |
174 |
|
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/* Try harder for CDrom. */
|
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if (bs->type == BDRV_TYPE_CDROM) {
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lseek(s->fd, offset, SEEK_SET); |
178 |
ret = read(s->fd, buf, count); |
179 |
if (ret == count)
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goto label__raw_read__success;
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181 |
lseek(s->fd, offset, SEEK_SET); |
182 |
ret = read(s->fd, buf, count); |
183 |
if (ret == count)
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goto label__raw_read__success;
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185 |
|
186 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
187 |
"] retry read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
189 |
bs->total_sectors, ret, errno, strerror(errno)); |
190 |
} |
191 |
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label__raw_read__success:
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193 |
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194 |
return ret;
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195 |
} |
196 |
|
197 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
198 |
const uint8_t *buf, int count) |
199 |
{ |
200 |
BDRVRawState *s = bs->opaque; |
201 |
int ret;
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202 |
|
203 |
ret = fd_open(bs); |
204 |
if (ret < 0) |
205 |
return ret;
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206 |
|
207 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
208 |
++(s->lseek_err_cnt); |
209 |
if(s->lseek_err_cnt) {
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DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
211 |
PRId64 "] lseek failed : %d = %s\n",
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212 |
s->fd, bs->filename, offset, buf, count, |
213 |
bs->total_sectors, errno, strerror(errno)); |
214 |
} |
215 |
return -1; |
216 |
} |
217 |
s->lseek_err_cnt = 0;
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218 |
|
219 |
ret = write(s->fd, buf, count); |
220 |
if (ret == count)
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goto label__raw_write__success;
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222 |
|
223 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
224 |
"] write failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
226 |
bs->total_sectors, ret, errno, strerror(errno)); |
227 |
|
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label__raw_write__success:
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return ret;
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} |
232 |
|
233 |
/***********************************************************/
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/* Unix AIO using POSIX AIO */
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235 |
|
236 |
typedef struct RawAIOCB { |
237 |
BlockDriverAIOCB common; |
238 |
struct aiocb aiocb;
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struct RawAIOCB *next;
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} RawAIOCB; |
241 |
|
242 |
static int aio_sig_num = SIGUSR2; |
243 |
static RawAIOCB *first_aio; /* AIO issued */ |
244 |
static int aio_initialized = 0; |
245 |
|
246 |
static void aio_signal_handler(int signum) |
247 |
{ |
248 |
#ifndef QEMU_IMG
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249 |
CPUState *env = cpu_single_env; |
250 |
if (env) {
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/* stop the currently executing cpu because a timer occured */
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cpu_interrupt(env, CPU_INTERRUPT_EXIT); |
253 |
#ifdef USE_KQEMU
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if (env->kqemu_enabled) {
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kqemu_cpu_interrupt(env); |
256 |
} |
257 |
#endif
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} |
259 |
#endif
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} |
261 |
|
262 |
void qemu_aio_init(void) |
263 |
{ |
264 |
struct sigaction act;
|
265 |
|
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aio_initialized = 1;
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267 |
|
268 |
sigfillset(&act.sa_mask); |
269 |
act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
270 |
act.sa_handler = aio_signal_handler; |
271 |
sigaction(aio_sig_num, &act, NULL);
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272 |
|
273 |
#if defined(__GLIBC__) && defined(__linux__)
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274 |
{ |
275 |
/* XXX: aio thread exit seems to hang on RedHat 9 and this init
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276 |
seems to fix the problem. */
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277 |
struct aioinit ai;
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278 |
memset(&ai, 0, sizeof(ai)); |
279 |
ai.aio_threads = 1;
|
280 |
ai.aio_num = 1;
|
281 |
ai.aio_idle_time = 365 * 100000; |
282 |
aio_init(&ai); |
283 |
} |
284 |
#endif
|
285 |
} |
286 |
|
287 |
void qemu_aio_poll(void) |
288 |
{ |
289 |
RawAIOCB *acb, **pacb; |
290 |
int ret;
|
291 |
|
292 |
for(;;) {
|
293 |
pacb = &first_aio; |
294 |
for(;;) {
|
295 |
acb = *pacb; |
296 |
if (!acb)
|
297 |
goto the_end;
|
298 |
ret = aio_error(&acb->aiocb); |
299 |
if (ret == ECANCELED) {
|
300 |
/* remove the request */
|
301 |
*pacb = acb->next; |
302 |
qemu_aio_release(acb); |
303 |
} else if (ret != EINPROGRESS) { |
304 |
/* end of aio */
|
305 |
if (ret == 0) { |
306 |
ret = aio_return(&acb->aiocb); |
307 |
if (ret == acb->aiocb.aio_nbytes)
|
308 |
ret = 0;
|
309 |
else
|
310 |
ret = -EINVAL; |
311 |
} else {
|
312 |
ret = -ret; |
313 |
} |
314 |
/* remove the request */
|
315 |
*pacb = acb->next; |
316 |
/* call the callback */
|
317 |
acb->common.cb(acb->common.opaque, ret); |
318 |
qemu_aio_release(acb); |
319 |
break;
|
320 |
} else {
|
321 |
pacb = &acb->next; |
322 |
} |
323 |
} |
324 |
} |
325 |
the_end: ;
|
326 |
} |
327 |
|
328 |
/* Wait for all IO requests to complete. */
|
329 |
void qemu_aio_flush(void) |
330 |
{ |
331 |
qemu_aio_wait_start(); |
332 |
qemu_aio_poll(); |
333 |
while (first_aio) {
|
334 |
qemu_aio_wait(); |
335 |
} |
336 |
qemu_aio_wait_end(); |
337 |
} |
338 |
|
339 |
/* wait until at least one AIO was handled */
|
340 |
static sigset_t wait_oset;
|
341 |
|
342 |
void qemu_aio_wait_start(void) |
343 |
{ |
344 |
sigset_t set; |
345 |
|
346 |
if (!aio_initialized)
|
347 |
qemu_aio_init(); |
348 |
sigemptyset(&set); |
349 |
sigaddset(&set, aio_sig_num); |
350 |
sigprocmask(SIG_BLOCK, &set, &wait_oset); |
351 |
} |
352 |
|
353 |
void qemu_aio_wait(void) |
354 |
{ |
355 |
sigset_t set; |
356 |
int nb_sigs;
|
357 |
|
358 |
#ifndef QEMU_IMG
|
359 |
if (qemu_bh_poll())
|
360 |
return;
|
361 |
#endif
|
362 |
sigemptyset(&set); |
363 |
sigaddset(&set, aio_sig_num); |
364 |
sigwait(&set, &nb_sigs); |
365 |
qemu_aio_poll(); |
366 |
} |
367 |
|
368 |
void qemu_aio_wait_end(void) |
369 |
{ |
370 |
sigprocmask(SIG_SETMASK, &wait_oset, NULL);
|
371 |
} |
372 |
|
373 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
374 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
375 |
BlockDriverCompletionFunc *cb, void *opaque)
|
376 |
{ |
377 |
BDRVRawState *s = bs->opaque; |
378 |
RawAIOCB *acb; |
379 |
|
380 |
if (fd_open(bs) < 0) |
381 |
return NULL; |
382 |
|
383 |
acb = qemu_aio_get(bs, cb, opaque); |
384 |
if (!acb)
|
385 |
return NULL; |
386 |
acb->aiocb.aio_fildes = s->fd; |
387 |
acb->aiocb.aio_sigevent.sigev_signo = aio_sig_num; |
388 |
acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; |
389 |
acb->aiocb.aio_buf = buf; |
390 |
if (nb_sectors < 0) |
391 |
acb->aiocb.aio_nbytes = -nb_sectors; |
392 |
else
|
393 |
acb->aiocb.aio_nbytes = nb_sectors * 512;
|
394 |
acb->aiocb.aio_offset = sector_num * 512;
|
395 |
acb->next = first_aio; |
396 |
first_aio = acb; |
397 |
return acb;
|
398 |
} |
399 |
|
400 |
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
401 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
402 |
BlockDriverCompletionFunc *cb, void *opaque)
|
403 |
{ |
404 |
RawAIOCB *acb; |
405 |
|
406 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
407 |
if (!acb)
|
408 |
return NULL; |
409 |
if (aio_read(&acb->aiocb) < 0) { |
410 |
qemu_aio_release(acb); |
411 |
return NULL; |
412 |
} |
413 |
return &acb->common;
|
414 |
} |
415 |
|
416 |
static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
417 |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
418 |
BlockDriverCompletionFunc *cb, void *opaque)
|
419 |
{ |
420 |
RawAIOCB *acb; |
421 |
|
422 |
acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque); |
423 |
if (!acb)
|
424 |
return NULL; |
425 |
if (aio_write(&acb->aiocb) < 0) { |
426 |
qemu_aio_release(acb); |
427 |
return NULL; |
428 |
} |
429 |
return &acb->common;
|
430 |
} |
431 |
|
432 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
433 |
{ |
434 |
int ret;
|
435 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
436 |
RawAIOCB **pacb; |
437 |
|
438 |
ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
439 |
if (ret == AIO_NOTCANCELED) {
|
440 |
/* fail safe: if the aio could not be canceled, we wait for
|
441 |
it */
|
442 |
while (aio_error(&acb->aiocb) == EINPROGRESS);
|
443 |
} |
444 |
|
445 |
/* remove the callback from the queue */
|
446 |
pacb = &first_aio; |
447 |
for(;;) {
|
448 |
if (*pacb == NULL) { |
449 |
break;
|
450 |
} else if (*pacb == acb) { |
451 |
*pacb = acb->next; |
452 |
qemu_aio_release(acb); |
453 |
break;
|
454 |
} |
455 |
pacb = &acb->next; |
456 |
} |
457 |
} |
458 |
|
459 |
static void raw_close(BlockDriverState *bs) |
460 |
{ |
461 |
BDRVRawState *s = bs->opaque; |
462 |
if (s->fd >= 0) { |
463 |
close(s->fd); |
464 |
s->fd = -1;
|
465 |
} |
466 |
} |
467 |
|
468 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
469 |
{ |
470 |
BDRVRawState *s = bs->opaque; |
471 |
if (s->type != FTYPE_FILE)
|
472 |
return -ENOTSUP;
|
473 |
if (ftruncate(s->fd, offset) < 0) |
474 |
return -errno;
|
475 |
return 0; |
476 |
} |
477 |
|
478 |
static int64_t raw_getlength(BlockDriverState *bs)
|
479 |
{ |
480 |
BDRVRawState *s = bs->opaque; |
481 |
int fd = s->fd;
|
482 |
int64_t size; |
483 |
#ifdef _BSD
|
484 |
struct stat sb;
|
485 |
#endif
|
486 |
#ifdef __sun__
|
487 |
struct dk_minfo minfo;
|
488 |
int rv;
|
489 |
#endif
|
490 |
int ret;
|
491 |
|
492 |
ret = fd_open(bs); |
493 |
if (ret < 0) |
494 |
return ret;
|
495 |
|
496 |
#ifdef _BSD
|
497 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
498 |
#ifdef DIOCGMEDIASIZE
|
499 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
500 |
#endif
|
501 |
#ifdef CONFIG_COCOA
|
502 |
size = LONG_LONG_MAX; |
503 |
#else
|
504 |
size = lseek(fd, 0LL, SEEK_END);
|
505 |
#endif
|
506 |
} else
|
507 |
#endif
|
508 |
#ifdef __sun__
|
509 |
/*
|
510 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
511 |
*/
|
512 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
513 |
if ( rv != -1 ) { |
514 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
515 |
} else /* there are reports that lseek on some devices |
516 |
fails, but irc discussion said that contingency
|
517 |
on contingency was overkill */
|
518 |
#endif
|
519 |
{ |
520 |
size = lseek(fd, 0, SEEK_END);
|
521 |
} |
522 |
return size;
|
523 |
} |
524 |
|
525 |
static int raw_create(const char *filename, int64_t total_size, |
526 |
const char *backing_file, int flags) |
527 |
{ |
528 |
int fd;
|
529 |
|
530 |
if (flags || backing_file)
|
531 |
return -ENOTSUP;
|
532 |
|
533 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
534 |
0644);
|
535 |
if (fd < 0) |
536 |
return -EIO;
|
537 |
ftruncate(fd, total_size * 512);
|
538 |
close(fd); |
539 |
return 0; |
540 |
} |
541 |
|
542 |
static void raw_flush(BlockDriverState *bs) |
543 |
{ |
544 |
BDRVRawState *s = bs->opaque; |
545 |
fsync(s->fd); |
546 |
} |
547 |
|
548 |
BlockDriver bdrv_raw = { |
549 |
"raw",
|
550 |
sizeof(BDRVRawState),
|
551 |
NULL, /* no probe for protocols */ |
552 |
raw_open, |
553 |
NULL,
|
554 |
NULL,
|
555 |
raw_close, |
556 |
raw_create, |
557 |
raw_flush, |
558 |
|
559 |
.bdrv_aio_read = raw_aio_read, |
560 |
.bdrv_aio_write = raw_aio_write, |
561 |
.bdrv_aio_cancel = raw_aio_cancel, |
562 |
.aiocb_size = sizeof(RawAIOCB),
|
563 |
.protocol_name = "file",
|
564 |
.bdrv_pread = raw_pread, |
565 |
.bdrv_pwrite = raw_pwrite, |
566 |
.bdrv_truncate = raw_truncate, |
567 |
.bdrv_getlength = raw_getlength, |
568 |
}; |
569 |
|
570 |
/***********************************************/
|
571 |
/* host device */
|
572 |
|
573 |
#ifdef CONFIG_COCOA
|
574 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
575 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
576 |
|
577 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
578 |
{ |
579 |
kern_return_t kernResult; |
580 |
mach_port_t masterPort; |
581 |
CFMutableDictionaryRef classesToMatch; |
582 |
|
583 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
584 |
if ( KERN_SUCCESS != kernResult ) {
|
585 |
printf( "IOMasterPort returned %d\n", kernResult );
|
586 |
} |
587 |
|
588 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
589 |
if ( classesToMatch == NULL ) { |
590 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
591 |
} else {
|
592 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
593 |
} |
594 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
595 |
if ( KERN_SUCCESS != kernResult )
|
596 |
{ |
597 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
598 |
} |
599 |
|
600 |
return kernResult;
|
601 |
} |
602 |
|
603 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
604 |
{ |
605 |
io_object_t nextMedia; |
606 |
kern_return_t kernResult = KERN_FAILURE; |
607 |
*bsdPath = '\0';
|
608 |
nextMedia = IOIteratorNext( mediaIterator ); |
609 |
if ( nextMedia )
|
610 |
{ |
611 |
CFTypeRef bsdPathAsCFString; |
612 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
613 |
if ( bsdPathAsCFString ) {
|
614 |
size_t devPathLength; |
615 |
strcpy( bsdPath, _PATH_DEV ); |
616 |
strcat( bsdPath, "r" );
|
617 |
devPathLength = strlen( bsdPath ); |
618 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
619 |
kernResult = KERN_SUCCESS; |
620 |
} |
621 |
CFRelease( bsdPathAsCFString ); |
622 |
} |
623 |
IOObjectRelease( nextMedia ); |
624 |
} |
625 |
|
626 |
return kernResult;
|
627 |
} |
628 |
|
629 |
#endif
|
630 |
|
631 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
632 |
{ |
633 |
BDRVRawState *s = bs->opaque; |
634 |
int fd, open_flags, ret;
|
635 |
|
636 |
#ifdef CONFIG_COCOA
|
637 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
638 |
kern_return_t kernResult; |
639 |
io_iterator_t mediaIterator; |
640 |
char bsdPath[ MAXPATHLEN ];
|
641 |
int fd;
|
642 |
|
643 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
644 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
645 |
|
646 |
if ( bsdPath[ 0 ] != '\0' ) { |
647 |
strcat(bsdPath,"s0");
|
648 |
/* some CDs don't have a partition 0 */
|
649 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
650 |
if (fd < 0) { |
651 |
bsdPath[strlen(bsdPath)-1] = '1'; |
652 |
} else {
|
653 |
close(fd); |
654 |
} |
655 |
filename = bsdPath; |
656 |
} |
657 |
|
658 |
if ( mediaIterator )
|
659 |
IOObjectRelease( mediaIterator ); |
660 |
} |
661 |
#endif
|
662 |
open_flags = O_BINARY; |
663 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
664 |
open_flags |= O_RDWR; |
665 |
} else {
|
666 |
open_flags |= O_RDONLY; |
667 |
bs->read_only = 1;
|
668 |
} |
669 |
#ifdef O_DIRECT
|
670 |
if (flags & BDRV_O_DIRECT)
|
671 |
open_flags |= O_DIRECT; |
672 |
#endif
|
673 |
|
674 |
s->type = FTYPE_FILE; |
675 |
#if defined(__linux__)
|
676 |
if (strstart(filename, "/dev/cd", NULL)) { |
677 |
/* open will not fail even if no CD is inserted */
|
678 |
open_flags |= O_NONBLOCK; |
679 |
s->type = FTYPE_CD; |
680 |
} else if (strstart(filename, "/dev/fd", NULL)) { |
681 |
s->type = FTYPE_FD; |
682 |
s->fd_open_flags = open_flags; |
683 |
/* open will not fail even if no floppy is inserted */
|
684 |
open_flags |= O_NONBLOCK; |
685 |
} else if (strstart(filename, "/dev/sg", NULL)) { |
686 |
bs->sg = 1;
|
687 |
} |
688 |
#endif
|
689 |
fd = open(filename, open_flags, 0644);
|
690 |
if (fd < 0) { |
691 |
ret = -errno; |
692 |
if (ret == -EROFS)
|
693 |
ret = -EACCES; |
694 |
return ret;
|
695 |
} |
696 |
s->fd = fd; |
697 |
#if defined(__linux__)
|
698 |
/* close fd so that we can reopen it as needed */
|
699 |
if (s->type == FTYPE_FD) {
|
700 |
close(s->fd); |
701 |
s->fd = -1;
|
702 |
s->fd_media_changed = 1;
|
703 |
} |
704 |
#endif
|
705 |
return 0; |
706 |
} |
707 |
|
708 |
#if defined(__linux__) && !defined(QEMU_IMG)
|
709 |
|
710 |
/* Note: we do not have a reliable method to detect if the floppy is
|
711 |
present. The current method is to try to open the floppy at every
|
712 |
I/O and to keep it opened during a few hundreds of ms. */
|
713 |
static int fd_open(BlockDriverState *bs) |
714 |
{ |
715 |
BDRVRawState *s = bs->opaque; |
716 |
int last_media_present;
|
717 |
|
718 |
if (s->type != FTYPE_FD)
|
719 |
return 0; |
720 |
last_media_present = (s->fd >= 0);
|
721 |
if (s->fd >= 0 && |
722 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
723 |
close(s->fd); |
724 |
s->fd = -1;
|
725 |
#ifdef DEBUG_FLOPPY
|
726 |
printf("Floppy closed\n");
|
727 |
#endif
|
728 |
} |
729 |
if (s->fd < 0) { |
730 |
if (s->fd_got_error &&
|
731 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
732 |
#ifdef DEBUG_FLOPPY
|
733 |
printf("No floppy (open delayed)\n");
|
734 |
#endif
|
735 |
return -EIO;
|
736 |
} |
737 |
s->fd = open(bs->filename, s->fd_open_flags); |
738 |
if (s->fd < 0) { |
739 |
s->fd_error_time = qemu_get_clock(rt_clock); |
740 |
s->fd_got_error = 1;
|
741 |
if (last_media_present)
|
742 |
s->fd_media_changed = 1;
|
743 |
#ifdef DEBUG_FLOPPY
|
744 |
printf("No floppy\n");
|
745 |
#endif
|
746 |
return -EIO;
|
747 |
} |
748 |
#ifdef DEBUG_FLOPPY
|
749 |
printf("Floppy opened\n");
|
750 |
#endif
|
751 |
} |
752 |
if (!last_media_present)
|
753 |
s->fd_media_changed = 1;
|
754 |
s->fd_open_time = qemu_get_clock(rt_clock); |
755 |
s->fd_got_error = 0;
|
756 |
return 0; |
757 |
} |
758 |
#else
|
759 |
static int fd_open(BlockDriverState *bs) |
760 |
{ |
761 |
return 0; |
762 |
} |
763 |
#endif
|
764 |
|
765 |
#if defined(__linux__)
|
766 |
|
767 |
static int raw_is_inserted(BlockDriverState *bs) |
768 |
{ |
769 |
BDRVRawState *s = bs->opaque; |
770 |
int ret;
|
771 |
|
772 |
switch(s->type) {
|
773 |
case FTYPE_CD:
|
774 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
775 |
if (ret == CDS_DISC_OK)
|
776 |
return 1; |
777 |
else
|
778 |
return 0; |
779 |
break;
|
780 |
case FTYPE_FD:
|
781 |
ret = fd_open(bs); |
782 |
return (ret >= 0); |
783 |
default:
|
784 |
return 1; |
785 |
} |
786 |
} |
787 |
|
788 |
/* currently only used by fdc.c, but a CD version would be good too */
|
789 |
static int raw_media_changed(BlockDriverState *bs) |
790 |
{ |
791 |
BDRVRawState *s = bs->opaque; |
792 |
|
793 |
switch(s->type) {
|
794 |
case FTYPE_FD:
|
795 |
{ |
796 |
int ret;
|
797 |
/* XXX: we do not have a true media changed indication. It
|
798 |
does not work if the floppy is changed without trying
|
799 |
to read it */
|
800 |
fd_open(bs); |
801 |
ret = s->fd_media_changed; |
802 |
s->fd_media_changed = 0;
|
803 |
#ifdef DEBUG_FLOPPY
|
804 |
printf("Floppy changed=%d\n", ret);
|
805 |
#endif
|
806 |
return ret;
|
807 |
} |
808 |
default:
|
809 |
return -ENOTSUP;
|
810 |
} |
811 |
} |
812 |
|
813 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
814 |
{ |
815 |
BDRVRawState *s = bs->opaque; |
816 |
|
817 |
switch(s->type) {
|
818 |
case FTYPE_CD:
|
819 |
if (eject_flag) {
|
820 |
if (ioctl (s->fd, CDROMEJECT, NULL) < 0) |
821 |
perror("CDROMEJECT");
|
822 |
} else {
|
823 |
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0) |
824 |
perror("CDROMEJECT");
|
825 |
} |
826 |
break;
|
827 |
case FTYPE_FD:
|
828 |
{ |
829 |
int fd;
|
830 |
if (s->fd >= 0) { |
831 |
close(s->fd); |
832 |
s->fd = -1;
|
833 |
} |
834 |
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK); |
835 |
if (fd >= 0) { |
836 |
if (ioctl(fd, FDEJECT, 0) < 0) |
837 |
perror("FDEJECT");
|
838 |
close(fd); |
839 |
} |
840 |
} |
841 |
break;
|
842 |
default:
|
843 |
return -ENOTSUP;
|
844 |
} |
845 |
return 0; |
846 |
} |
847 |
|
848 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
849 |
{ |
850 |
BDRVRawState *s = bs->opaque; |
851 |
|
852 |
switch(s->type) {
|
853 |
case FTYPE_CD:
|
854 |
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) { |
855 |
/* Note: an error can happen if the distribution automatically
|
856 |
mounts the CD-ROM */
|
857 |
// perror("CDROM_LOCKDOOR");
|
858 |
} |
859 |
break;
|
860 |
default:
|
861 |
return -ENOTSUP;
|
862 |
} |
863 |
return 0; |
864 |
} |
865 |
|
866 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
867 |
{ |
868 |
BDRVRawState *s = bs->opaque; |
869 |
|
870 |
return ioctl(s->fd, req, buf);
|
871 |
} |
872 |
#else
|
873 |
|
874 |
static int raw_is_inserted(BlockDriverState *bs) |
875 |
{ |
876 |
return 1; |
877 |
} |
878 |
|
879 |
static int raw_media_changed(BlockDriverState *bs) |
880 |
{ |
881 |
return -ENOTSUP;
|
882 |
} |
883 |
|
884 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
885 |
{ |
886 |
return -ENOTSUP;
|
887 |
} |
888 |
|
889 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
890 |
{ |
891 |
return -ENOTSUP;
|
892 |
} |
893 |
|
894 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
895 |
{ |
896 |
return -ENOTSUP;
|
897 |
} |
898 |
#endif /* !linux */ |
899 |
|
900 |
BlockDriver bdrv_host_device = { |
901 |
"host_device",
|
902 |
sizeof(BDRVRawState),
|
903 |
NULL, /* no probe for protocols */ |
904 |
hdev_open, |
905 |
NULL,
|
906 |
NULL,
|
907 |
raw_close, |
908 |
NULL,
|
909 |
raw_flush, |
910 |
|
911 |
.bdrv_aio_read = raw_aio_read, |
912 |
.bdrv_aio_write = raw_aio_write, |
913 |
.bdrv_aio_cancel = raw_aio_cancel, |
914 |
.aiocb_size = sizeof(RawAIOCB),
|
915 |
.bdrv_pread = raw_pread, |
916 |
.bdrv_pwrite = raw_pwrite, |
917 |
.bdrv_getlength = raw_getlength, |
918 |
|
919 |
/* removable device support */
|
920 |
.bdrv_is_inserted = raw_is_inserted, |
921 |
.bdrv_media_changed = raw_media_changed, |
922 |
.bdrv_eject = raw_eject, |
923 |
.bdrv_set_locked = raw_set_locked, |
924 |
/* generic scsi device */
|
925 |
.bdrv_ioctl = raw_ioctl, |
926 |
}; |