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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 |
#include "qemu-timer.h" |
26 |
#include "qemu-char.h" |
27 |
#include "block_int.h" |
28 |
#include "compatfd.h" |
29 |
#include <assert.h> |
30 |
#ifdef CONFIG_AIO
|
31 |
#include <aio.h> |
32 |
#endif
|
33 |
|
34 |
#ifdef CONFIG_COCOA
|
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#include <paths.h> |
36 |
#include <sys/param.h> |
37 |
#include <IOKit/IOKitLib.h> |
38 |
#include <IOKit/IOBSD.h> |
39 |
#include <IOKit/storage/IOMediaBSDClient.h> |
40 |
#include <IOKit/storage/IOMedia.h> |
41 |
#include <IOKit/storage/IOCDMedia.h> |
42 |
//#include <IOKit/storage/IOCDTypes.h>
|
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#include <CoreFoundation/CoreFoundation.h> |
44 |
#endif
|
45 |
|
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#ifdef __sun__
|
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#define _POSIX_PTHREAD_SEMANTICS 1 |
48 |
#include <signal.h> |
49 |
#include <sys/dkio.h> |
50 |
#endif
|
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#ifdef __linux__
|
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#include <sys/ioctl.h> |
53 |
#include <linux/cdrom.h> |
54 |
#include <linux/fd.h> |
55 |
#endif
|
56 |
#ifdef __FreeBSD__
|
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#include <signal.h> |
58 |
#include <sys/disk.h> |
59 |
#endif
|
60 |
|
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#ifdef __OpenBSD__
|
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#include <sys/ioctl.h> |
63 |
#include <sys/disklabel.h> |
64 |
#include <sys/dkio.h> |
65 |
#endif
|
66 |
|
67 |
//#define DEBUG_FLOPPY
|
68 |
|
69 |
//#define DEBUG_BLOCK
|
70 |
#if defined(DEBUG_BLOCK)
|
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#define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \ |
72 |
{ fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0) |
73 |
#else
|
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#define DEBUG_BLOCK_PRINT(formatCstr, args...)
|
75 |
#endif
|
76 |
|
77 |
#define FTYPE_FILE 0 |
78 |
#define FTYPE_CD 1 |
79 |
#define FTYPE_FD 2 |
80 |
|
81 |
#define ALIGNED_BUFFER_SIZE (32 * 512) |
82 |
|
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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 */
|
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#define FD_OPEN_TIMEOUT 1000 |
86 |
|
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/* posix-aio doesn't allow multiple outstanding requests to a single file
|
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* descriptor. we implement a pool of dup()'d file descriptors to work
|
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* around this */
|
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#define RAW_FD_POOL_SIZE 64 |
91 |
|
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typedef struct BDRVRawState { |
93 |
int fd;
|
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int type;
|
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unsigned int lseek_err_cnt; |
96 |
int fd_pool[RAW_FD_POOL_SIZE];
|
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#if defined(__linux__)
|
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/* linux floppy specific */
|
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int fd_open_flags;
|
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int64_t fd_open_time; |
101 |
int64_t fd_error_time; |
102 |
int fd_got_error;
|
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int fd_media_changed;
|
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#endif
|
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#if defined(O_DIRECT)
|
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uint8_t* aligned_buf; |
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#endif
|
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} BDRVRawState; |
109 |
|
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static int posix_aio_init(void); |
111 |
|
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static int fd_open(BlockDriverState *bs); |
113 |
|
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static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
115 |
{ |
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BDRVRawState *s = bs->opaque; |
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int fd, open_flags, ret;
|
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int i;
|
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|
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posix_aio_init(); |
121 |
|
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s->lseek_err_cnt = 0;
|
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|
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open_flags = O_BINARY; |
125 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
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open_flags |= O_RDWR; |
127 |
} else {
|
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open_flags |= O_RDONLY; |
129 |
bs->read_only = 1;
|
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} |
131 |
if (flags & BDRV_O_CREAT)
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open_flags |= O_CREAT | O_TRUNC; |
133 |
#ifdef O_DIRECT
|
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if (flags & BDRV_O_DIRECT)
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open_flags |= O_DIRECT; |
136 |
#endif
|
137 |
|
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s->type = FTYPE_FILE; |
139 |
|
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fd = open(filename, open_flags, 0644);
|
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if (fd < 0) { |
142 |
ret = -errno; |
143 |
if (ret == -EROFS)
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ret = -EACCES; |
145 |
return ret;
|
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} |
147 |
s->fd = fd; |
148 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) |
149 |
s->fd_pool[i] = -1;
|
150 |
#if defined(O_DIRECT)
|
151 |
s->aligned_buf = NULL;
|
152 |
if (flags & BDRV_O_DIRECT) {
|
153 |
s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
|
154 |
if (s->aligned_buf == NULL) { |
155 |
ret = -errno; |
156 |
close(fd); |
157 |
return ret;
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158 |
} |
159 |
} |
160 |
#endif
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return 0; |
162 |
} |
163 |
|
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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) &&
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169 |
sectorsize > bufsize)
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bufsize = sectorsize;
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171 |
}
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172 |
#endif
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#ifdef CONFIG_COCOA
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174 |
u_int32_t blockSize = 512;
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175 |
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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180 |
|
181 |
/*
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* offset and count are in bytes, but must be multiples of 512 for files
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183 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
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184 |
*
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185 |
* This function may be called without alignment if the caller ensures
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186 |
* that O_DIRECT is not in effect.
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187 |
*/
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static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, |
189 |
uint8_t *buf, int count)
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190 |
{ |
191 |
BDRVRawState *s = bs->opaque; |
192 |
int ret;
|
193 |
|
194 |
ret = fd_open(bs); |
195 |
if (ret < 0) |
196 |
return ret;
|
197 |
|
198 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
199 |
++(s->lseek_err_cnt); |
200 |
if(s->lseek_err_cnt <= 10) { |
201 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
202 |
"] lseek failed : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
204 |
bs->total_sectors, errno, strerror(errno)); |
205 |
} |
206 |
return -1; |
207 |
} |
208 |
s->lseek_err_cnt=0;
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|
210 |
ret = read(s->fd, buf, count); |
211 |
if (ret == count)
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goto label__raw_read__success;
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213 |
|
214 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
215 |
"] read failed %d : %d = %s\n",
|
216 |
s->fd, bs->filename, offset, buf, count, |
217 |
bs->total_sectors, ret, errno, strerror(errno)); |
218 |
|
219 |
/* Try harder for CDrom. */
|
220 |
if (bs->type == BDRV_TYPE_CDROM) {
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lseek(s->fd, offset, SEEK_SET); |
222 |
ret = read(s->fd, buf, count); |
223 |
if (ret == count)
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goto label__raw_read__success;
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lseek(s->fd, offset, SEEK_SET); |
226 |
ret = read(s->fd, buf, count); |
227 |
if (ret == count)
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goto label__raw_read__success;
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229 |
|
230 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
231 |
"] retry read failed %d : %d = %s\n",
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232 |
s->fd, bs->filename, offset, buf, count, |
233 |
bs->total_sectors, ret, errno, strerror(errno)); |
234 |
} |
235 |
|
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label__raw_read__success:
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237 |
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return ret;
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} |
240 |
|
241 |
/*
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242 |
* offset and count are in bytes, but must be multiples of 512 for files
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243 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
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244 |
*
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245 |
* This function may be called without alignment if the caller ensures
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246 |
* that O_DIRECT is not in effect.
|
247 |
*/
|
248 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
249 |
const uint8_t *buf, int count) |
250 |
{ |
251 |
BDRVRawState *s = bs->opaque; |
252 |
int ret;
|
253 |
|
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ret = fd_open(bs); |
255 |
if (ret < 0) |
256 |
return ret;
|
257 |
|
258 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
259 |
++(s->lseek_err_cnt); |
260 |
if(s->lseek_err_cnt) {
|
261 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
262 |
PRId64 "] lseek failed : %d = %s\n",
|
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s->fd, bs->filename, offset, buf, count, |
264 |
bs->total_sectors, errno, strerror(errno)); |
265 |
} |
266 |
return -1; |
267 |
} |
268 |
s->lseek_err_cnt = 0;
|
269 |
|
270 |
ret = write(s->fd, buf, count); |
271 |
if (ret == count)
|
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goto label__raw_write__success;
|
273 |
|
274 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
275 |
"] write failed %d : %d = %s\n",
|
276 |
s->fd, bs->filename, offset, buf, count, |
277 |
bs->total_sectors, ret, errno, strerror(errno)); |
278 |
|
279 |
label__raw_write__success:
|
280 |
|
281 |
return ret;
|
282 |
} |
283 |
|
284 |
|
285 |
#if defined(O_DIRECT)
|
286 |
/*
|
287 |
* offset and count are in bytes and possibly not aligned. For files opened
|
288 |
* with O_DIRECT, necessary alignments are ensured before calling
|
289 |
* raw_pread_aligned to do the actual read.
|
290 |
*/
|
291 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
292 |
uint8_t *buf, int count)
|
293 |
{ |
294 |
BDRVRawState *s = bs->opaque; |
295 |
int size, ret, shift, sum;
|
296 |
|
297 |
sum = 0;
|
298 |
|
299 |
if (s->aligned_buf != NULL) { |
300 |
|
301 |
if (offset & 0x1ff) { |
302 |
/* align offset on a 512 bytes boundary */
|
303 |
|
304 |
shift = offset & 0x1ff;
|
305 |
size = (shift + count + 0x1ff) & ~0x1ff; |
306 |
if (size > ALIGNED_BUFFER_SIZE)
|
307 |
size = ALIGNED_BUFFER_SIZE; |
308 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
309 |
if (ret < 0) |
310 |
return ret;
|
311 |
|
312 |
size = 512 - shift;
|
313 |
if (size > count)
|
314 |
size = count; |
315 |
memcpy(buf, s->aligned_buf + shift, size); |
316 |
|
317 |
buf += size; |
318 |
offset += size; |
319 |
count -= size; |
320 |
sum += size; |
321 |
|
322 |
if (count == 0) |
323 |
return sum;
|
324 |
} |
325 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
326 |
|
327 |
/* read on aligned buffer */
|
328 |
|
329 |
while (count) {
|
330 |
|
331 |
size = (count + 0x1ff) & ~0x1ff; |
332 |
if (size > ALIGNED_BUFFER_SIZE)
|
333 |
size = ALIGNED_BUFFER_SIZE; |
334 |
|
335 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
336 |
if (ret < 0) |
337 |
return ret;
|
338 |
|
339 |
size = ret; |
340 |
if (size > count)
|
341 |
size = count; |
342 |
|
343 |
memcpy(buf, s->aligned_buf, size); |
344 |
|
345 |
buf += size; |
346 |
offset += size; |
347 |
count -= size; |
348 |
sum += size; |
349 |
} |
350 |
|
351 |
return sum;
|
352 |
} |
353 |
} |
354 |
|
355 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
356 |
} |
357 |
|
358 |
/*
|
359 |
* offset and count are in bytes and possibly not aligned. For files opened
|
360 |
* with O_DIRECT, necessary alignments are ensured before calling
|
361 |
* raw_pwrite_aligned to do the actual write.
|
362 |
*/
|
363 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
364 |
const uint8_t *buf, int count) |
365 |
{ |
366 |
BDRVRawState *s = bs->opaque; |
367 |
int size, ret, shift, sum;
|
368 |
|
369 |
sum = 0;
|
370 |
|
371 |
if (s->aligned_buf != NULL) { |
372 |
|
373 |
if (offset & 0x1ff) { |
374 |
/* align offset on a 512 bytes boundary */
|
375 |
shift = offset & 0x1ff;
|
376 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
377 |
if (ret < 0) |
378 |
return ret;
|
379 |
|
380 |
size = 512 - shift;
|
381 |
if (size > count)
|
382 |
size = count; |
383 |
memcpy(s->aligned_buf + shift, buf, size); |
384 |
|
385 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
386 |
if (ret < 0) |
387 |
return ret;
|
388 |
|
389 |
buf += size; |
390 |
offset += size; |
391 |
count -= size; |
392 |
sum += size; |
393 |
|
394 |
if (count == 0) |
395 |
return sum;
|
396 |
} |
397 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
398 |
|
399 |
while ((size = (count & ~0x1ff)) != 0) { |
400 |
|
401 |
if (size > ALIGNED_BUFFER_SIZE)
|
402 |
size = ALIGNED_BUFFER_SIZE; |
403 |
|
404 |
memcpy(s->aligned_buf, buf, size); |
405 |
|
406 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
407 |
if (ret < 0) |
408 |
return ret;
|
409 |
|
410 |
buf += ret; |
411 |
offset += ret; |
412 |
count -= ret; |
413 |
sum += ret; |
414 |
} |
415 |
/* here, count < 512 because (count & ~0x1ff) == 0 */
|
416 |
if (count) {
|
417 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
418 |
if (ret < 0) |
419 |
return ret;
|
420 |
memcpy(s->aligned_buf, buf, count); |
421 |
|
422 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
423 |
if (ret < 0) |
424 |
return ret;
|
425 |
if (count < ret)
|
426 |
ret = count; |
427 |
|
428 |
sum += ret; |
429 |
} |
430 |
return sum;
|
431 |
} |
432 |
} |
433 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
434 |
} |
435 |
|
436 |
#else
|
437 |
#define raw_pread raw_pread_aligned
|
438 |
#define raw_pwrite raw_pwrite_aligned
|
439 |
#endif
|
440 |
|
441 |
|
442 |
#ifdef CONFIG_AIO
|
443 |
/***********************************************************/
|
444 |
/* Unix AIO using POSIX AIO */
|
445 |
|
446 |
typedef struct RawAIOCB { |
447 |
BlockDriverAIOCB common; |
448 |
int fd;
|
449 |
struct aiocb aiocb;
|
450 |
struct RawAIOCB *next;
|
451 |
int ret;
|
452 |
} RawAIOCB; |
453 |
|
454 |
typedef struct PosixAioState |
455 |
{ |
456 |
int fd;
|
457 |
RawAIOCB *first_aio; |
458 |
} PosixAioState; |
459 |
|
460 |
static int raw_fd_pool_get(BDRVRawState *s) |
461 |
{ |
462 |
int i;
|
463 |
|
464 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
465 |
/* already in use */
|
466 |
if (s->fd_pool[i] != -1) |
467 |
continue;
|
468 |
|
469 |
/* try to dup file descriptor */
|
470 |
s->fd_pool[i] = dup(s->fd); |
471 |
if (s->fd_pool[i] != -1) |
472 |
return s->fd_pool[i];
|
473 |
} |
474 |
|
475 |
/* we couldn't dup the file descriptor so just use the main one */
|
476 |
return s->fd;
|
477 |
} |
478 |
|
479 |
static void raw_fd_pool_put(RawAIOCB *acb) |
480 |
{ |
481 |
BDRVRawState *s = acb->common.bs->opaque; |
482 |
int i;
|
483 |
|
484 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
485 |
if (s->fd_pool[i] == acb->fd) {
|
486 |
close(s->fd_pool[i]); |
487 |
s->fd_pool[i] = -1;
|
488 |
} |
489 |
} |
490 |
} |
491 |
|
492 |
static void posix_aio_read(void *opaque) |
493 |
{ |
494 |
PosixAioState *s = opaque; |
495 |
RawAIOCB *acb, **pacb; |
496 |
int ret;
|
497 |
size_t offset; |
498 |
union {
|
499 |
struct qemu_signalfd_siginfo siginfo;
|
500 |
char buf[128]; |
501 |
} sig; |
502 |
|
503 |
/* try to read from signalfd, don't freak out if we can't read anything */
|
504 |
offset = 0;
|
505 |
while (offset < 128) { |
506 |
ssize_t len; |
507 |
|
508 |
len = read(s->fd, sig.buf + offset, 128 - offset);
|
509 |
if (len == -1 && errno == EINTR) |
510 |
continue;
|
511 |
if (len == -1 && errno == EAGAIN) { |
512 |
/* there is no natural reason for this to happen,
|
513 |
* so we'll spin hard until we get everything just
|
514 |
* to be on the safe side. */
|
515 |
if (offset > 0) |
516 |
continue;
|
517 |
} |
518 |
|
519 |
offset += len; |
520 |
} |
521 |
|
522 |
for(;;) {
|
523 |
pacb = &s->first_aio; |
524 |
for(;;) {
|
525 |
acb = *pacb; |
526 |
if (!acb)
|
527 |
goto the_end;
|
528 |
ret = aio_error(&acb->aiocb); |
529 |
if (ret == ECANCELED) {
|
530 |
/* remove the request */
|
531 |
*pacb = acb->next; |
532 |
raw_fd_pool_put(acb); |
533 |
qemu_aio_release(acb); |
534 |
} else if (ret != EINPROGRESS) { |
535 |
/* end of aio */
|
536 |
if (ret == 0) { |
537 |
ret = aio_return(&acb->aiocb); |
538 |
if (ret == acb->aiocb.aio_nbytes)
|
539 |
ret = 0;
|
540 |
else
|
541 |
ret = -EINVAL; |
542 |
} else {
|
543 |
ret = -ret; |
544 |
} |
545 |
/* remove the request */
|
546 |
*pacb = acb->next; |
547 |
/* call the callback */
|
548 |
acb->common.cb(acb->common.opaque, ret); |
549 |
raw_fd_pool_put(acb); |
550 |
qemu_aio_release(acb); |
551 |
break;
|
552 |
} else {
|
553 |
pacb = &acb->next; |
554 |
} |
555 |
} |
556 |
} |
557 |
the_end: ;
|
558 |
} |
559 |
|
560 |
static int posix_aio_flush(void *opaque) |
561 |
{ |
562 |
PosixAioState *s = opaque; |
563 |
return !!s->first_aio;
|
564 |
} |
565 |
|
566 |
static PosixAioState *posix_aio_state;
|
567 |
|
568 |
static int posix_aio_init(void) |
569 |
{ |
570 |
sigset_t mask; |
571 |
PosixAioState *s; |
572 |
struct aioinit ai;
|
573 |
|
574 |
if (posix_aio_state)
|
575 |
return 0; |
576 |
|
577 |
s = qemu_malloc(sizeof(PosixAioState));
|
578 |
if (s == NULL) |
579 |
return -ENOMEM;
|
580 |
|
581 |
/* Make sure to block AIO signal */
|
582 |
sigemptyset(&mask); |
583 |
sigaddset(&mask, SIGUSR2); |
584 |
sigprocmask(SIG_BLOCK, &mask, NULL);
|
585 |
|
586 |
s->first_aio = NULL;
|
587 |
s->fd = qemu_signalfd(&mask); |
588 |
|
589 |
fcntl(s->fd, F_SETFL, O_NONBLOCK); |
590 |
|
591 |
qemu_aio_set_fd_handler(s->fd, posix_aio_read, NULL, posix_aio_flush, s);
|
592 |
|
593 |
memset(&ai, 0, sizeof(ai)); |
594 |
#if !defined(__linux__) || (defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 4)) |
595 |
ai.aio_threads = 5;
|
596 |
ai.aio_num = 1;
|
597 |
#else
|
598 |
/* XXX: aio thread exit seems to hang on RedHat 9 and this init
|
599 |
seems to fix the problem. */
|
600 |
ai.aio_threads = 1;
|
601 |
ai.aio_num = 1;
|
602 |
ai.aio_idle_time = 365 * 100000; |
603 |
#endif
|
604 |
aio_init(&ai); |
605 |
posix_aio_state = s; |
606 |
|
607 |
return 0; |
608 |
} |
609 |
|
610 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
611 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
612 |
BlockDriverCompletionFunc *cb, void *opaque)
|
613 |
{ |
614 |
BDRVRawState *s = bs->opaque; |
615 |
RawAIOCB *acb; |
616 |
|
617 |
if (fd_open(bs) < 0) |
618 |
return NULL; |
619 |
|
620 |
acb = qemu_aio_get(bs, cb, opaque); |
621 |
if (!acb)
|
622 |
return NULL; |
623 |
acb->fd = raw_fd_pool_get(s); |
624 |
acb->aiocb.aio_fildes = acb->fd; |
625 |
acb->aiocb.aio_sigevent.sigev_signo = SIGUSR2; |
626 |
acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; |
627 |
acb->aiocb.aio_buf = buf; |
628 |
if (nb_sectors < 0) |
629 |
acb->aiocb.aio_nbytes = -nb_sectors; |
630 |
else
|
631 |
acb->aiocb.aio_nbytes = nb_sectors * 512;
|
632 |
acb->aiocb.aio_offset = sector_num * 512;
|
633 |
acb->next = posix_aio_state->first_aio; |
634 |
posix_aio_state->first_aio = acb; |
635 |
return acb;
|
636 |
} |
637 |
|
638 |
static void raw_aio_em_cb(void* opaque) |
639 |
{ |
640 |
RawAIOCB *acb = opaque; |
641 |
acb->common.cb(acb->common.opaque, acb->ret); |
642 |
qemu_aio_release(acb); |
643 |
} |
644 |
|
645 |
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
646 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
647 |
BlockDriverCompletionFunc *cb, void *opaque)
|
648 |
{ |
649 |
RawAIOCB *acb; |
650 |
|
651 |
/*
|
652 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
653 |
* to synchronous IO.
|
654 |
*/
|
655 |
#if defined(O_DIRECT)
|
656 |
BDRVRawState *s = bs->opaque; |
657 |
|
658 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
659 |
QEMUBH *bh; |
660 |
acb = qemu_aio_get(bs, cb, opaque); |
661 |
acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors); |
662 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
663 |
qemu_bh_schedule(bh); |
664 |
return &acb->common;
|
665 |
} |
666 |
#endif
|
667 |
|
668 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
669 |
if (!acb)
|
670 |
return NULL; |
671 |
if (aio_read(&acb->aiocb) < 0) { |
672 |
qemu_aio_release(acb); |
673 |
return NULL; |
674 |
} |
675 |
return &acb->common;
|
676 |
} |
677 |
|
678 |
static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
679 |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
680 |
BlockDriverCompletionFunc *cb, void *opaque)
|
681 |
{ |
682 |
RawAIOCB *acb; |
683 |
|
684 |
/*
|
685 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
686 |
* to synchronous IO.
|
687 |
*/
|
688 |
#if defined(O_DIRECT)
|
689 |
BDRVRawState *s = bs->opaque; |
690 |
|
691 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
692 |
QEMUBH *bh; |
693 |
acb = qemu_aio_get(bs, cb, opaque); |
694 |
acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors); |
695 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
696 |
qemu_bh_schedule(bh); |
697 |
return &acb->common;
|
698 |
} |
699 |
#endif
|
700 |
|
701 |
acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque); |
702 |
if (!acb)
|
703 |
return NULL; |
704 |
if (aio_write(&acb->aiocb) < 0) { |
705 |
qemu_aio_release(acb); |
706 |
return NULL; |
707 |
} |
708 |
return &acb->common;
|
709 |
} |
710 |
|
711 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
712 |
{ |
713 |
int ret;
|
714 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
715 |
RawAIOCB **pacb; |
716 |
|
717 |
ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
718 |
if (ret == AIO_NOTCANCELED) {
|
719 |
/* fail safe: if the aio could not be canceled, we wait for
|
720 |
it */
|
721 |
while (aio_error(&acb->aiocb) == EINPROGRESS);
|
722 |
} |
723 |
|
724 |
/* remove the callback from the queue */
|
725 |
pacb = &posix_aio_state->first_aio; |
726 |
for(;;) {
|
727 |
if (*pacb == NULL) { |
728 |
break;
|
729 |
} else if (*pacb == acb) { |
730 |
*pacb = acb->next; |
731 |
raw_fd_pool_put(acb); |
732 |
qemu_aio_release(acb); |
733 |
break;
|
734 |
} |
735 |
pacb = &acb->next; |
736 |
} |
737 |
} |
738 |
|
739 |
#else /* CONFIG_AIO */ |
740 |
static int posix_aio_init(void) |
741 |
{ |
742 |
} |
743 |
#endif /* CONFIG_AIO */ |
744 |
|
745 |
static void raw_close_fd_pool(BDRVRawState *s) |
746 |
{ |
747 |
int i;
|
748 |
|
749 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
750 |
if (s->fd_pool[i] != -1) { |
751 |
close(s->fd_pool[i]); |
752 |
s->fd_pool[i] = -1;
|
753 |
} |
754 |
} |
755 |
} |
756 |
|
757 |
static void raw_close(BlockDriverState *bs) |
758 |
{ |
759 |
BDRVRawState *s = bs->opaque; |
760 |
if (s->fd >= 0) { |
761 |
close(s->fd); |
762 |
s->fd = -1;
|
763 |
#if defined(O_DIRECT)
|
764 |
if (s->aligned_buf != NULL) |
765 |
qemu_free(s->aligned_buf); |
766 |
#endif
|
767 |
} |
768 |
raw_close_fd_pool(s); |
769 |
} |
770 |
|
771 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
772 |
{ |
773 |
BDRVRawState *s = bs->opaque; |
774 |
if (s->type != FTYPE_FILE)
|
775 |
return -ENOTSUP;
|
776 |
if (ftruncate(s->fd, offset) < 0) |
777 |
return -errno;
|
778 |
return 0; |
779 |
} |
780 |
|
781 |
#ifdef __OpenBSD__
|
782 |
static int64_t raw_getlength(BlockDriverState *bs)
|
783 |
{ |
784 |
BDRVRawState *s = bs->opaque; |
785 |
int fd = s->fd;
|
786 |
struct stat st;
|
787 |
|
788 |
if (fstat(fd, &st))
|
789 |
return -1; |
790 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
791 |
struct disklabel dl;
|
792 |
|
793 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
794 |
return -1; |
795 |
return (uint64_t)dl.d_secsize *
|
796 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
797 |
} else
|
798 |
return st.st_size;
|
799 |
} |
800 |
#else /* !__OpenBSD__ */ |
801 |
static int64_t raw_getlength(BlockDriverState *bs)
|
802 |
{ |
803 |
BDRVRawState *s = bs->opaque; |
804 |
int fd = s->fd;
|
805 |
int64_t size; |
806 |
#ifdef _BSD
|
807 |
struct stat sb;
|
808 |
#endif
|
809 |
#ifdef __sun__
|
810 |
struct dk_minfo minfo;
|
811 |
int rv;
|
812 |
#endif
|
813 |
int ret;
|
814 |
|
815 |
ret = fd_open(bs); |
816 |
if (ret < 0) |
817 |
return ret;
|
818 |
|
819 |
#ifdef _BSD
|
820 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
821 |
#ifdef DIOCGMEDIASIZE
|
822 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
823 |
#endif
|
824 |
#ifdef CONFIG_COCOA
|
825 |
size = LONG_LONG_MAX; |
826 |
#else
|
827 |
size = lseek(fd, 0LL, SEEK_END);
|
828 |
#endif
|
829 |
} else
|
830 |
#endif
|
831 |
#ifdef __sun__
|
832 |
/*
|
833 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
834 |
*/
|
835 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
836 |
if ( rv != -1 ) { |
837 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
838 |
} else /* there are reports that lseek on some devices |
839 |
fails, but irc discussion said that contingency
|
840 |
on contingency was overkill */
|
841 |
#endif
|
842 |
{ |
843 |
size = lseek(fd, 0, SEEK_END);
|
844 |
} |
845 |
return size;
|
846 |
} |
847 |
#endif
|
848 |
|
849 |
static int raw_create(const char *filename, int64_t total_size, |
850 |
const char *backing_file, int flags) |
851 |
{ |
852 |
int fd;
|
853 |
|
854 |
if (flags || backing_file)
|
855 |
return -ENOTSUP;
|
856 |
|
857 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
858 |
0644);
|
859 |
if (fd < 0) |
860 |
return -EIO;
|
861 |
ftruncate(fd, total_size * 512);
|
862 |
close(fd); |
863 |
return 0; |
864 |
} |
865 |
|
866 |
static void raw_flush(BlockDriverState *bs) |
867 |
{ |
868 |
BDRVRawState *s = bs->opaque; |
869 |
fsync(s->fd); |
870 |
} |
871 |
|
872 |
BlockDriver bdrv_raw = { |
873 |
"raw",
|
874 |
sizeof(BDRVRawState),
|
875 |
NULL, /* no probe for protocols */ |
876 |
raw_open, |
877 |
NULL,
|
878 |
NULL,
|
879 |
raw_close, |
880 |
raw_create, |
881 |
raw_flush, |
882 |
|
883 |
#ifdef CONFIG_AIO
|
884 |
.bdrv_aio_read = raw_aio_read, |
885 |
.bdrv_aio_write = raw_aio_write, |
886 |
.bdrv_aio_cancel = raw_aio_cancel, |
887 |
.aiocb_size = sizeof(RawAIOCB),
|
888 |
#endif
|
889 |
.bdrv_pread = raw_pread, |
890 |
.bdrv_pwrite = raw_pwrite, |
891 |
.bdrv_truncate = raw_truncate, |
892 |
.bdrv_getlength = raw_getlength, |
893 |
}; |
894 |
|
895 |
/***********************************************/
|
896 |
/* host device */
|
897 |
|
898 |
#ifdef CONFIG_COCOA
|
899 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
900 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
901 |
|
902 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
903 |
{ |
904 |
kern_return_t kernResult; |
905 |
mach_port_t masterPort; |
906 |
CFMutableDictionaryRef classesToMatch; |
907 |
|
908 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
909 |
if ( KERN_SUCCESS != kernResult ) {
|
910 |
printf( "IOMasterPort returned %d\n", kernResult );
|
911 |
} |
912 |
|
913 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
914 |
if ( classesToMatch == NULL ) { |
915 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
916 |
} else {
|
917 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
918 |
} |
919 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
920 |
if ( KERN_SUCCESS != kernResult )
|
921 |
{ |
922 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
923 |
} |
924 |
|
925 |
return kernResult;
|
926 |
} |
927 |
|
928 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
929 |
{ |
930 |
io_object_t nextMedia; |
931 |
kern_return_t kernResult = KERN_FAILURE; |
932 |
*bsdPath = '\0';
|
933 |
nextMedia = IOIteratorNext( mediaIterator ); |
934 |
if ( nextMedia )
|
935 |
{ |
936 |
CFTypeRef bsdPathAsCFString; |
937 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
938 |
if ( bsdPathAsCFString ) {
|
939 |
size_t devPathLength; |
940 |
strcpy( bsdPath, _PATH_DEV ); |
941 |
strcat( bsdPath, "r" );
|
942 |
devPathLength = strlen( bsdPath ); |
943 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
944 |
kernResult = KERN_SUCCESS; |
945 |
} |
946 |
CFRelease( bsdPathAsCFString ); |
947 |
} |
948 |
IOObjectRelease( nextMedia ); |
949 |
} |
950 |
|
951 |
return kernResult;
|
952 |
} |
953 |
|
954 |
#endif
|
955 |
|
956 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
957 |
{ |
958 |
BDRVRawState *s = bs->opaque; |
959 |
int fd, open_flags, ret, i;
|
960 |
|
961 |
posix_aio_init(); |
962 |
|
963 |
#ifdef CONFIG_COCOA
|
964 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
965 |
kern_return_t kernResult; |
966 |
io_iterator_t mediaIterator; |
967 |
char bsdPath[ MAXPATHLEN ];
|
968 |
int fd;
|
969 |
|
970 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
971 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
972 |
|
973 |
if ( bsdPath[ 0 ] != '\0' ) { |
974 |
strcat(bsdPath,"s0");
|
975 |
/* some CDs don't have a partition 0 */
|
976 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
977 |
if (fd < 0) { |
978 |
bsdPath[strlen(bsdPath)-1] = '1'; |
979 |
} else {
|
980 |
close(fd); |
981 |
} |
982 |
filename = bsdPath; |
983 |
} |
984 |
|
985 |
if ( mediaIterator )
|
986 |
IOObjectRelease( mediaIterator ); |
987 |
} |
988 |
#endif
|
989 |
open_flags = O_BINARY; |
990 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
991 |
open_flags |= O_RDWR; |
992 |
} else {
|
993 |
open_flags |= O_RDONLY; |
994 |
bs->read_only = 1;
|
995 |
} |
996 |
#ifdef O_DIRECT
|
997 |
if (flags & BDRV_O_DIRECT)
|
998 |
open_flags |= O_DIRECT; |
999 |
#endif
|
1000 |
|
1001 |
s->type = FTYPE_FILE; |
1002 |
#if defined(__linux__)
|
1003 |
if (strstart(filename, "/dev/cd", NULL)) { |
1004 |
/* open will not fail even if no CD is inserted */
|
1005 |
open_flags |= O_NONBLOCK; |
1006 |
s->type = FTYPE_CD; |
1007 |
} else if (strstart(filename, "/dev/fd", NULL)) { |
1008 |
s->type = FTYPE_FD; |
1009 |
s->fd_open_flags = open_flags; |
1010 |
/* open will not fail even if no floppy is inserted */
|
1011 |
open_flags |= O_NONBLOCK; |
1012 |
} else if (strstart(filename, "/dev/sg", NULL)) { |
1013 |
bs->sg = 1;
|
1014 |
} |
1015 |
#endif
|
1016 |
fd = open(filename, open_flags, 0644);
|
1017 |
if (fd < 0) { |
1018 |
ret = -errno; |
1019 |
if (ret == -EROFS)
|
1020 |
ret = -EACCES; |
1021 |
return ret;
|
1022 |
} |
1023 |
s->fd = fd; |
1024 |
for (i = 0; i < RAW_FD_POOL_SIZE; i++) |
1025 |
s->fd_pool[i] = -1;
|
1026 |
#if defined(__linux__)
|
1027 |
/* close fd so that we can reopen it as needed */
|
1028 |
if (s->type == FTYPE_FD) {
|
1029 |
close(s->fd); |
1030 |
s->fd = -1;
|
1031 |
s->fd_media_changed = 1;
|
1032 |
} |
1033 |
#endif
|
1034 |
return 0; |
1035 |
} |
1036 |
|
1037 |
#if defined(__linux__)
|
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);
|
1049 |
if (s->fd >= 0 && |
1050 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
1051 |
close(s->fd); |
1052 |
s->fd = -1;
|
1053 |
raw_close_fd_pool(s); |
1054 |
#ifdef DEBUG_FLOPPY
|
1055 |
printf("Floppy closed\n");
|
1056 |
#endif
|
1057 |
} |
1058 |
if (s->fd < 0) { |
1059 |
if (s->fd_got_error &&
|
1060 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
1061 |
#ifdef DEBUG_FLOPPY
|
1062 |
printf("No floppy (open delayed)\n");
|
1063 |
#endif
|
1064 |
return -EIO;
|
1065 |
} |
1066 |
s->fd = open(bs->filename, s->fd_open_flags); |
1067 |
if (s->fd < 0) { |
1068 |
s->fd_error_time = qemu_get_clock(rt_clock); |
1069 |
s->fd_got_error = 1;
|
1070 |
if (last_media_present)
|
1071 |
s->fd_media_changed = 1;
|
1072 |
#ifdef DEBUG_FLOPPY
|
1073 |
printf("No floppy\n");
|
1074 |
#endif
|
1075 |
return -EIO;
|
1076 |
} |
1077 |
#ifdef DEBUG_FLOPPY
|
1078 |
printf("Floppy opened\n");
|
1079 |
#endif
|
1080 |
} |
1081 |
if (!last_media_present)
|
1082 |
s->fd_media_changed = 1;
|
1083 |
s->fd_open_time = qemu_get_clock(rt_clock); |
1084 |
s->fd_got_error = 0;
|
1085 |
return 0; |
1086 |
} |
1087 |
|
1088 |
static int raw_is_inserted(BlockDriverState *bs) |
1089 |
{ |
1090 |
BDRVRawState *s = bs->opaque; |
1091 |
int ret;
|
1092 |
|
1093 |
switch(s->type) {
|
1094 |
case FTYPE_CD:
|
1095 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1096 |
if (ret == CDS_DISC_OK)
|
1097 |
return 1; |
1098 |
else
|
1099 |
return 0; |
1100 |
break;
|
1101 |
case FTYPE_FD:
|
1102 |
ret = fd_open(bs); |
1103 |
return (ret >= 0); |
1104 |
default:
|
1105 |
return 1; |
1106 |
} |
1107 |
} |
1108 |
|
1109 |
/* currently only used by fdc.c, but a CD version would be good too */
|
1110 |
static int raw_media_changed(BlockDriverState *bs) |
1111 |
{ |
1112 |
BDRVRawState *s = bs->opaque; |
1113 |
|
1114 |
switch(s->type) {
|
1115 |
case FTYPE_FD:
|
1116 |
{ |
1117 |
int ret;
|
1118 |
/* XXX: we do not have a true media changed indication. It
|
1119 |
does not work if the floppy is changed without trying
|
1120 |
to read it */
|
1121 |
fd_open(bs); |
1122 |
ret = s->fd_media_changed; |
1123 |
s->fd_media_changed = 0;
|
1124 |
#ifdef DEBUG_FLOPPY
|
1125 |
printf("Floppy changed=%d\n", ret);
|
1126 |
#endif
|
1127 |
return ret;
|
1128 |
} |
1129 |
default:
|
1130 |
return -ENOTSUP;
|
1131 |
} |
1132 |
} |
1133 |
|
1134 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1135 |
{ |
1136 |
BDRVRawState *s = bs->opaque; |
1137 |
|
1138 |
switch(s->type) {
|
1139 |
case FTYPE_CD:
|
1140 |
if (eject_flag) {
|
1141 |
if (ioctl (s->fd, CDROMEJECT, NULL) < 0) |
1142 |
perror("CDROMEJECT");
|
1143 |
} else {
|
1144 |
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0) |
1145 |
perror("CDROMEJECT");
|
1146 |
} |
1147 |
break;
|
1148 |
case FTYPE_FD:
|
1149 |
{ |
1150 |
int fd;
|
1151 |
if (s->fd >= 0) { |
1152 |
close(s->fd); |
1153 |
s->fd = -1;
|
1154 |
raw_close_fd_pool(s); |
1155 |
} |
1156 |
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK); |
1157 |
if (fd >= 0) { |
1158 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1159 |
perror("FDEJECT");
|
1160 |
close(fd); |
1161 |
} |
1162 |
} |
1163 |
break;
|
1164 |
default:
|
1165 |
return -ENOTSUP;
|
1166 |
} |
1167 |
return 0; |
1168 |
} |
1169 |
|
1170 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1171 |
{ |
1172 |
BDRVRawState *s = bs->opaque; |
1173 |
|
1174 |
switch(s->type) {
|
1175 |
case FTYPE_CD:
|
1176 |
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1177 |
/* Note: an error can happen if the distribution automatically
|
1178 |
mounts the CD-ROM */
|
1179 |
// perror("CDROM_LOCKDOOR");
|
1180 |
} |
1181 |
break;
|
1182 |
default:
|
1183 |
return -ENOTSUP;
|
1184 |
} |
1185 |
return 0; |
1186 |
} |
1187 |
|
1188 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1189 |
{ |
1190 |
BDRVRawState *s = bs->opaque; |
1191 |
|
1192 |
return ioctl(s->fd, req, buf);
|
1193 |
} |
1194 |
#else
|
1195 |
|
1196 |
static int fd_open(BlockDriverState *bs) |
1197 |
{ |
1198 |
return 0; |
1199 |
} |
1200 |
|
1201 |
static int raw_is_inserted(BlockDriverState *bs) |
1202 |
{ |
1203 |
return 1; |
1204 |
} |
1205 |
|
1206 |
static int raw_media_changed(BlockDriverState *bs) |
1207 |
{ |
1208 |
return -ENOTSUP;
|
1209 |
} |
1210 |
|
1211 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1212 |
{ |
1213 |
return -ENOTSUP;
|
1214 |
} |
1215 |
|
1216 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1217 |
{ |
1218 |
return -ENOTSUP;
|
1219 |
} |
1220 |
|
1221 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1222 |
{ |
1223 |
return -ENOTSUP;
|
1224 |
} |
1225 |
#endif /* !linux */ |
1226 |
|
1227 |
BlockDriver bdrv_host_device = { |
1228 |
"host_device",
|
1229 |
sizeof(BDRVRawState),
|
1230 |
NULL, /* no probe for protocols */ |
1231 |
hdev_open, |
1232 |
NULL,
|
1233 |
NULL,
|
1234 |
raw_close, |
1235 |
NULL,
|
1236 |
raw_flush, |
1237 |
|
1238 |
#ifdef CONFIG_AIO
|
1239 |
.bdrv_aio_read = raw_aio_read, |
1240 |
.bdrv_aio_write = raw_aio_write, |
1241 |
.bdrv_aio_cancel = raw_aio_cancel, |
1242 |
.aiocb_size = sizeof(RawAIOCB),
|
1243 |
#endif
|
1244 |
.bdrv_pread = raw_pread, |
1245 |
.bdrv_pwrite = raw_pwrite, |
1246 |
.bdrv_getlength = raw_getlength, |
1247 |
|
1248 |
/* removable device support */
|
1249 |
.bdrv_is_inserted = raw_is_inserted, |
1250 |
.bdrv_media_changed = raw_media_changed, |
1251 |
.bdrv_eject = raw_eject, |
1252 |
.bdrv_set_locked = raw_set_locked, |
1253 |
/* generic scsi device */
|
1254 |
.bdrv_ioctl = raw_ioctl, |
1255 |
}; |