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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 <assert.h> |
29 |
#ifdef CONFIG_AIO
|
30 |
#include "posix-aio-compat.h" |
31 |
#endif
|
32 |
|
33 |
#ifdef CONFIG_COCOA
|
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#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>
|
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#include <CoreFoundation/CoreFoundation.h> |
43 |
#endif
|
44 |
|
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#ifdef __sun__
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#define _POSIX_PTHREAD_SEMANTICS 1 |
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#include <signal.h> |
48 |
#include <sys/dkio.h> |
49 |
#endif
|
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#ifdef __linux__
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#include <sys/ioctl.h> |
52 |
#include <linux/cdrom.h> |
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#include <linux/fd.h> |
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#endif
|
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#ifdef __FreeBSD__
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#include <signal.h> |
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#include <sys/disk.h> |
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#endif
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|
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#ifdef __OpenBSD__
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#include <sys/ioctl.h> |
62 |
#include <sys/disklabel.h> |
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#include <sys/dkio.h> |
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#endif
|
65 |
|
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//#define DEBUG_FLOPPY
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67 |
|
68 |
//#define DEBUG_BLOCK
|
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#if defined(DEBUG_BLOCK)
|
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#define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (qemu_log_enabled()) \ |
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{ qemu_log(formatCstr, ##args); qemu_log_flush(); } } while (0) |
72 |
#else
|
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#define DEBUG_BLOCK_PRINT(formatCstr, args...)
|
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#endif
|
75 |
|
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/* OS X does not have O_DSYNC */
|
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#ifndef O_DSYNC
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#define O_DSYNC O_SYNC
|
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#endif
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|
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/* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
|
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#ifndef O_DIRECT
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#define O_DIRECT O_DSYNC
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#endif
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85 |
|
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#define FTYPE_FILE 0 |
87 |
#define FTYPE_CD 1 |
88 |
#define FTYPE_FD 2 |
89 |
|
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#define ALIGNED_BUFFER_SIZE (32 * 512) |
91 |
|
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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 |
95 |
|
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typedef struct BDRVRawState { |
97 |
int fd;
|
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int type;
|
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unsigned int lseek_err_cnt; |
100 |
#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; |
104 |
int64_t fd_error_time; |
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int fd_got_error;
|
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int fd_media_changed;
|
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#endif
|
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uint8_t* aligned_buf; |
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} BDRVRawState; |
110 |
|
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static int posix_aio_init(void); |
112 |
|
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static int fd_open(BlockDriverState *bs); |
114 |
|
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static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
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{ |
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BDRVRawState *s = bs->opaque; |
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int fd, open_flags, ret;
|
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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 |
|
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/* Use O_DSYNC for write-through caching, no flags for write-back caching,
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* and O_DIRECT for no caching. */
|
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if ((flags & BDRV_O_NOCACHE))
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open_flags |= O_DIRECT; |
138 |
else if (!(flags & BDRV_O_CACHE_WB)) |
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open_flags |= O_DSYNC; |
140 |
|
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s->type = FTYPE_FILE; |
142 |
|
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fd = open(filename, open_flags, 0644);
|
144 |
if (fd < 0) { |
145 |
ret = -errno; |
146 |
if (ret == -EROFS)
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ret = -EACCES; |
148 |
return ret;
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} |
150 |
s->fd = fd; |
151 |
s->aligned_buf = NULL;
|
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if ((flags & BDRV_O_NOCACHE)) {
|
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s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
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if (s->aligned_buf == NULL) { |
155 |
ret = -errno; |
156 |
close(fd); |
157 |
return ret;
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} |
159 |
} |
160 |
return 0; |
161 |
} |
162 |
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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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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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179 |
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180 |
/*
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* offset and count are in bytes, but must be multiples of 512 for files
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182 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
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183 |
*
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184 |
* This function may be called without alignment if the caller ensures
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185 |
* that O_DIRECT is not in effect.
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*/
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static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, |
188 |
uint8_t *buf, int count)
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{ |
190 |
BDRVRawState *s = bs->opaque; |
191 |
int ret;
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192 |
|
193 |
ret = fd_open(bs); |
194 |
if (ret < 0) |
195 |
return ret;
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196 |
|
197 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
198 |
++(s->lseek_err_cnt); |
199 |
if(s->lseek_err_cnt <= 10) { |
200 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
201 |
"] lseek failed : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
203 |
bs->total_sectors, errno, strerror(errno)); |
204 |
} |
205 |
return -1; |
206 |
} |
207 |
s->lseek_err_cnt=0;
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ret = read(s->fd, buf, count); |
210 |
if (ret == count)
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goto label__raw_read__success;
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212 |
|
213 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
214 |
"] read failed %d : %d = %s\n",
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215 |
s->fd, bs->filename, offset, buf, count, |
216 |
bs->total_sectors, ret, errno, strerror(errno)); |
217 |
|
218 |
/* Try harder for CDrom. */
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219 |
if (bs->type == BDRV_TYPE_CDROM) {
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lseek(s->fd, offset, SEEK_SET); |
221 |
ret = read(s->fd, buf, count); |
222 |
if (ret == count)
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goto label__raw_read__success;
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lseek(s->fd, offset, SEEK_SET); |
225 |
ret = read(s->fd, buf, count); |
226 |
if (ret == count)
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goto label__raw_read__success;
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228 |
|
229 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
230 |
"] retry read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
232 |
bs->total_sectors, ret, errno, strerror(errno)); |
233 |
} |
234 |
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label__raw_read__success:
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return ret;
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} |
239 |
|
240 |
/*
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241 |
* offset and count are in bytes, but must be multiples of 512 for files
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242 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
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243 |
*
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244 |
* This function may be called without alignment if the caller ensures
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245 |
* that O_DIRECT is not in effect.
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246 |
*/
|
247 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
248 |
const uint8_t *buf, int count) |
249 |
{ |
250 |
BDRVRawState *s = bs->opaque; |
251 |
int ret;
|
252 |
|
253 |
ret = fd_open(bs); |
254 |
if (ret < 0) |
255 |
return -errno;
|
256 |
|
257 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
258 |
++(s->lseek_err_cnt); |
259 |
if(s->lseek_err_cnt) {
|
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DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
261 |
PRId64 "] lseek failed : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
263 |
bs->total_sectors, errno, strerror(errno)); |
264 |
} |
265 |
return -EIO;
|
266 |
} |
267 |
s->lseek_err_cnt = 0;
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268 |
|
269 |
ret = write(s->fd, buf, count); |
270 |
if (ret == count)
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goto label__raw_write__success;
|
272 |
|
273 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
274 |
"] write failed %d : %d = %s\n",
|
275 |
s->fd, bs->filename, offset, buf, count, |
276 |
bs->total_sectors, ret, errno, strerror(errno)); |
277 |
|
278 |
label__raw_write__success:
|
279 |
|
280 |
return (ret < 0) ? -errno : ret; |
281 |
} |
282 |
|
283 |
|
284 |
/*
|
285 |
* offset and count are in bytes and possibly not aligned. For files opened
|
286 |
* with O_DIRECT, necessary alignments are ensured before calling
|
287 |
* raw_pread_aligned to do the actual read.
|
288 |
*/
|
289 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
290 |
uint8_t *buf, int count)
|
291 |
{ |
292 |
BDRVRawState *s = bs->opaque; |
293 |
int size, ret, shift, sum;
|
294 |
|
295 |
sum = 0;
|
296 |
|
297 |
if (s->aligned_buf != NULL) { |
298 |
|
299 |
if (offset & 0x1ff) { |
300 |
/* align offset on a 512 bytes boundary */
|
301 |
|
302 |
shift = offset & 0x1ff;
|
303 |
size = (shift + count + 0x1ff) & ~0x1ff; |
304 |
if (size > ALIGNED_BUFFER_SIZE)
|
305 |
size = ALIGNED_BUFFER_SIZE; |
306 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
307 |
if (ret < 0) |
308 |
return ret;
|
309 |
|
310 |
size = 512 - shift;
|
311 |
if (size > count)
|
312 |
size = count; |
313 |
memcpy(buf, s->aligned_buf + shift, size); |
314 |
|
315 |
buf += size; |
316 |
offset += size; |
317 |
count -= size; |
318 |
sum += size; |
319 |
|
320 |
if (count == 0) |
321 |
return sum;
|
322 |
} |
323 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
324 |
|
325 |
/* read on aligned buffer */
|
326 |
|
327 |
while (count) {
|
328 |
|
329 |
size = (count + 0x1ff) & ~0x1ff; |
330 |
if (size > ALIGNED_BUFFER_SIZE)
|
331 |
size = ALIGNED_BUFFER_SIZE; |
332 |
|
333 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
334 |
if (ret < 0) |
335 |
return ret;
|
336 |
|
337 |
size = ret; |
338 |
if (size > count)
|
339 |
size = count; |
340 |
|
341 |
memcpy(buf, s->aligned_buf, size); |
342 |
|
343 |
buf += size; |
344 |
offset += size; |
345 |
count -= size; |
346 |
sum += size; |
347 |
} |
348 |
|
349 |
return sum;
|
350 |
} |
351 |
} |
352 |
|
353 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
354 |
} |
355 |
|
356 |
/*
|
357 |
* offset and count are in bytes and possibly not aligned. For files opened
|
358 |
* with O_DIRECT, necessary alignments are ensured before calling
|
359 |
* raw_pwrite_aligned to do the actual write.
|
360 |
*/
|
361 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
362 |
const uint8_t *buf, int count) |
363 |
{ |
364 |
BDRVRawState *s = bs->opaque; |
365 |
int size, ret, shift, sum;
|
366 |
|
367 |
sum = 0;
|
368 |
|
369 |
if (s->aligned_buf != NULL) { |
370 |
|
371 |
if (offset & 0x1ff) { |
372 |
/* align offset on a 512 bytes boundary */
|
373 |
shift = offset & 0x1ff;
|
374 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
375 |
if (ret < 0) |
376 |
return ret;
|
377 |
|
378 |
size = 512 - shift;
|
379 |
if (size > count)
|
380 |
size = count; |
381 |
memcpy(s->aligned_buf + shift, buf, size); |
382 |
|
383 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
384 |
if (ret < 0) |
385 |
return ret;
|
386 |
|
387 |
buf += size; |
388 |
offset += size; |
389 |
count -= size; |
390 |
sum += size; |
391 |
|
392 |
if (count == 0) |
393 |
return sum;
|
394 |
} |
395 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
396 |
|
397 |
while ((size = (count & ~0x1ff)) != 0) { |
398 |
|
399 |
if (size > ALIGNED_BUFFER_SIZE)
|
400 |
size = ALIGNED_BUFFER_SIZE; |
401 |
|
402 |
memcpy(s->aligned_buf, buf, size); |
403 |
|
404 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
405 |
if (ret < 0) |
406 |
return ret;
|
407 |
|
408 |
buf += ret; |
409 |
offset += ret; |
410 |
count -= ret; |
411 |
sum += ret; |
412 |
} |
413 |
/* here, count < 512 because (count & ~0x1ff) == 0 */
|
414 |
if (count) {
|
415 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
416 |
if (ret < 0) |
417 |
return ret;
|
418 |
memcpy(s->aligned_buf, buf, count); |
419 |
|
420 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
421 |
if (ret < 0) |
422 |
return ret;
|
423 |
if (count < ret)
|
424 |
ret = count; |
425 |
|
426 |
sum += ret; |
427 |
} |
428 |
return sum;
|
429 |
} |
430 |
} |
431 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
432 |
} |
433 |
|
434 |
#ifdef CONFIG_AIO
|
435 |
/***********************************************************/
|
436 |
/* Unix AIO using POSIX AIO */
|
437 |
|
438 |
typedef struct RawAIOCB { |
439 |
BlockDriverAIOCB common; |
440 |
struct qemu_paiocb aiocb;
|
441 |
struct RawAIOCB *next;
|
442 |
int ret;
|
443 |
} RawAIOCB; |
444 |
|
445 |
typedef struct PosixAioState |
446 |
{ |
447 |
int rfd, wfd;
|
448 |
RawAIOCB *first_aio; |
449 |
} PosixAioState; |
450 |
|
451 |
static void posix_aio_read(void *opaque) |
452 |
{ |
453 |
PosixAioState *s = opaque; |
454 |
RawAIOCB *acb, **pacb; |
455 |
int ret;
|
456 |
ssize_t len; |
457 |
|
458 |
/* read all bytes from signal pipe */
|
459 |
for (;;) {
|
460 |
char bytes[16]; |
461 |
|
462 |
len = read(s->rfd, bytes, sizeof(bytes));
|
463 |
if (len == -1 && errno == EINTR) |
464 |
continue; /* try again */ |
465 |
if (len == sizeof(bytes)) |
466 |
continue; /* more to read */ |
467 |
break;
|
468 |
} |
469 |
|
470 |
for(;;) {
|
471 |
pacb = &s->first_aio; |
472 |
for(;;) {
|
473 |
acb = *pacb; |
474 |
if (!acb)
|
475 |
goto the_end;
|
476 |
ret = qemu_paio_error(&acb->aiocb); |
477 |
if (ret == ECANCELED) {
|
478 |
/* remove the request */
|
479 |
*pacb = acb->next; |
480 |
qemu_aio_release(acb); |
481 |
} else if (ret != EINPROGRESS) { |
482 |
/* end of aio */
|
483 |
if (ret == 0) { |
484 |
ret = qemu_paio_return(&acb->aiocb); |
485 |
if (ret == acb->aiocb.aio_nbytes)
|
486 |
ret = 0;
|
487 |
else
|
488 |
ret = -EINVAL; |
489 |
} else {
|
490 |
ret = -ret; |
491 |
} |
492 |
/* remove the request */
|
493 |
*pacb = acb->next; |
494 |
/* call the callback */
|
495 |
acb->common.cb(acb->common.opaque, ret); |
496 |
qemu_aio_release(acb); |
497 |
break;
|
498 |
} else {
|
499 |
pacb = &acb->next; |
500 |
} |
501 |
} |
502 |
} |
503 |
the_end: ;
|
504 |
} |
505 |
|
506 |
static int posix_aio_flush(void *opaque) |
507 |
{ |
508 |
PosixAioState *s = opaque; |
509 |
return !!s->first_aio;
|
510 |
} |
511 |
|
512 |
static PosixAioState *posix_aio_state;
|
513 |
|
514 |
static void aio_signal_handler(int signum) |
515 |
{ |
516 |
if (posix_aio_state) {
|
517 |
char byte = 0; |
518 |
|
519 |
write(posix_aio_state->wfd, &byte, sizeof(byte));
|
520 |
} |
521 |
|
522 |
qemu_service_io(); |
523 |
} |
524 |
|
525 |
static int posix_aio_init(void) |
526 |
{ |
527 |
struct sigaction act;
|
528 |
PosixAioState *s; |
529 |
int fds[2]; |
530 |
struct qemu_paioinit ai;
|
531 |
|
532 |
if (posix_aio_state)
|
533 |
return 0; |
534 |
|
535 |
s = qemu_malloc(sizeof(PosixAioState));
|
536 |
|
537 |
sigfillset(&act.sa_mask); |
538 |
act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
539 |
act.sa_handler = aio_signal_handler; |
540 |
sigaction(SIGUSR2, &act, NULL);
|
541 |
|
542 |
s->first_aio = NULL;
|
543 |
if (pipe(fds) == -1) { |
544 |
fprintf(stderr, "failed to create pipe\n");
|
545 |
return -errno;
|
546 |
} |
547 |
|
548 |
s->rfd = fds[0];
|
549 |
s->wfd = fds[1];
|
550 |
|
551 |
fcntl(s->rfd, F_SETFL, O_NONBLOCK); |
552 |
fcntl(s->wfd, F_SETFL, O_NONBLOCK); |
553 |
|
554 |
qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
|
555 |
|
556 |
memset(&ai, 0, sizeof(ai)); |
557 |
ai.aio_threads = 64;
|
558 |
ai.aio_num = 64;
|
559 |
qemu_paio_init(&ai); |
560 |
|
561 |
posix_aio_state = s; |
562 |
|
563 |
return 0; |
564 |
} |
565 |
|
566 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
567 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
568 |
BlockDriverCompletionFunc *cb, void *opaque)
|
569 |
{ |
570 |
BDRVRawState *s = bs->opaque; |
571 |
RawAIOCB *acb; |
572 |
|
573 |
if (fd_open(bs) < 0) |
574 |
return NULL; |
575 |
|
576 |
acb = qemu_aio_get(bs, cb, opaque); |
577 |
if (!acb)
|
578 |
return NULL; |
579 |
acb->aiocb.aio_fildes = s->fd; |
580 |
acb->aiocb.ev_signo = SIGUSR2; |
581 |
acb->aiocb.aio_buf = buf; |
582 |
if (nb_sectors < 0) |
583 |
acb->aiocb.aio_nbytes = -nb_sectors; |
584 |
else
|
585 |
acb->aiocb.aio_nbytes = nb_sectors * 512;
|
586 |
acb->aiocb.aio_offset = sector_num * 512;
|
587 |
acb->next = posix_aio_state->first_aio; |
588 |
posix_aio_state->first_aio = acb; |
589 |
return acb;
|
590 |
} |
591 |
|
592 |
static void raw_aio_em_cb(void* opaque) |
593 |
{ |
594 |
RawAIOCB *acb = opaque; |
595 |
acb->common.cb(acb->common.opaque, acb->ret); |
596 |
qemu_aio_release(acb); |
597 |
} |
598 |
|
599 |
static void raw_aio_remove(RawAIOCB *acb) |
600 |
{ |
601 |
RawAIOCB **pacb; |
602 |
|
603 |
/* remove the callback from the queue */
|
604 |
pacb = &posix_aio_state->first_aio; |
605 |
for(;;) {
|
606 |
if (*pacb == NULL) { |
607 |
fprintf(stderr, "raw_aio_remove: aio request not found!\n");
|
608 |
break;
|
609 |
} else if (*pacb == acb) { |
610 |
*pacb = acb->next; |
611 |
qemu_aio_release(acb); |
612 |
break;
|
613 |
} |
614 |
pacb = &(*pacb)->next; |
615 |
} |
616 |
} |
617 |
|
618 |
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
619 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
620 |
BlockDriverCompletionFunc *cb, void *opaque)
|
621 |
{ |
622 |
RawAIOCB *acb; |
623 |
|
624 |
/*
|
625 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
626 |
* to synchronous IO.
|
627 |
*/
|
628 |
BDRVRawState *s = bs->opaque; |
629 |
|
630 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
631 |
QEMUBH *bh; |
632 |
acb = qemu_aio_get(bs, cb, opaque); |
633 |
acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors); |
634 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
635 |
qemu_bh_schedule(bh); |
636 |
return &acb->common;
|
637 |
} |
638 |
|
639 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
640 |
if (!acb)
|
641 |
return NULL; |
642 |
if (qemu_paio_read(&acb->aiocb) < 0) { |
643 |
raw_aio_remove(acb); |
644 |
return NULL; |
645 |
} |
646 |
return &acb->common;
|
647 |
} |
648 |
|
649 |
static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
650 |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
651 |
BlockDriverCompletionFunc *cb, void *opaque)
|
652 |
{ |
653 |
RawAIOCB *acb; |
654 |
|
655 |
/*
|
656 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
657 |
* to synchronous IO.
|
658 |
*/
|
659 |
BDRVRawState *s = bs->opaque; |
660 |
|
661 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
662 |
QEMUBH *bh; |
663 |
acb = qemu_aio_get(bs, cb, opaque); |
664 |
acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors); |
665 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
666 |
qemu_bh_schedule(bh); |
667 |
return &acb->common;
|
668 |
} |
669 |
|
670 |
acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque); |
671 |
if (!acb)
|
672 |
return NULL; |
673 |
if (qemu_paio_write(&acb->aiocb) < 0) { |
674 |
raw_aio_remove(acb); |
675 |
return NULL; |
676 |
} |
677 |
return &acb->common;
|
678 |
} |
679 |
|
680 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
681 |
{ |
682 |
int ret;
|
683 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
684 |
|
685 |
ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
686 |
if (ret == QEMU_PAIO_NOTCANCELED) {
|
687 |
/* fail safe: if the aio could not be canceled, we wait for
|
688 |
it */
|
689 |
while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
|
690 |
} |
691 |
|
692 |
raw_aio_remove(acb); |
693 |
} |
694 |
#else /* CONFIG_AIO */ |
695 |
static int posix_aio_init(void) |
696 |
{ |
697 |
return 0; |
698 |
} |
699 |
#endif /* CONFIG_AIO */ |
700 |
|
701 |
|
702 |
static void raw_close(BlockDriverState *bs) |
703 |
{ |
704 |
BDRVRawState *s = bs->opaque; |
705 |
if (s->fd >= 0) { |
706 |
close(s->fd); |
707 |
s->fd = -1;
|
708 |
if (s->aligned_buf != NULL) |
709 |
qemu_free(s->aligned_buf); |
710 |
} |
711 |
} |
712 |
|
713 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
714 |
{ |
715 |
BDRVRawState *s = bs->opaque; |
716 |
if (s->type != FTYPE_FILE)
|
717 |
return -ENOTSUP;
|
718 |
if (ftruncate(s->fd, offset) < 0) |
719 |
return -errno;
|
720 |
return 0; |
721 |
} |
722 |
|
723 |
#ifdef __OpenBSD__
|
724 |
static int64_t raw_getlength(BlockDriverState *bs)
|
725 |
{ |
726 |
BDRVRawState *s = bs->opaque; |
727 |
int fd = s->fd;
|
728 |
struct stat st;
|
729 |
|
730 |
if (fstat(fd, &st))
|
731 |
return -1; |
732 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
733 |
struct disklabel dl;
|
734 |
|
735 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
736 |
return -1; |
737 |
return (uint64_t)dl.d_secsize *
|
738 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
739 |
} else
|
740 |
return st.st_size;
|
741 |
} |
742 |
#else /* !__OpenBSD__ */ |
743 |
static int64_t raw_getlength(BlockDriverState *bs)
|
744 |
{ |
745 |
BDRVRawState *s = bs->opaque; |
746 |
int fd = s->fd;
|
747 |
int64_t size; |
748 |
#ifdef _BSD
|
749 |
struct stat sb;
|
750 |
#endif
|
751 |
#ifdef __sun__
|
752 |
struct dk_minfo minfo;
|
753 |
int rv;
|
754 |
#endif
|
755 |
int ret;
|
756 |
|
757 |
ret = fd_open(bs); |
758 |
if (ret < 0) |
759 |
return ret;
|
760 |
|
761 |
#ifdef _BSD
|
762 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
763 |
#ifdef DIOCGMEDIASIZE
|
764 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
765 |
#endif
|
766 |
#ifdef CONFIG_COCOA
|
767 |
size = LONG_LONG_MAX; |
768 |
#else
|
769 |
size = lseek(fd, 0LL, SEEK_END);
|
770 |
#endif
|
771 |
} else
|
772 |
#endif
|
773 |
#ifdef __sun__
|
774 |
/*
|
775 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
776 |
*/
|
777 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
778 |
if ( rv != -1 ) { |
779 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
780 |
} else /* there are reports that lseek on some devices |
781 |
fails, but irc discussion said that contingency
|
782 |
on contingency was overkill */
|
783 |
#endif
|
784 |
{ |
785 |
size = lseek(fd, 0, SEEK_END);
|
786 |
} |
787 |
return size;
|
788 |
} |
789 |
#endif
|
790 |
|
791 |
static int raw_create(const char *filename, int64_t total_size, |
792 |
const char *backing_file, int flags) |
793 |
{ |
794 |
int fd;
|
795 |
|
796 |
if (flags || backing_file)
|
797 |
return -ENOTSUP;
|
798 |
|
799 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
800 |
0644);
|
801 |
if (fd < 0) |
802 |
return -EIO;
|
803 |
ftruncate(fd, total_size * 512);
|
804 |
close(fd); |
805 |
return 0; |
806 |
} |
807 |
|
808 |
static void raw_flush(BlockDriverState *bs) |
809 |
{ |
810 |
BDRVRawState *s = bs->opaque; |
811 |
fsync(s->fd); |
812 |
} |
813 |
|
814 |
BlockDriver bdrv_raw = { |
815 |
"raw",
|
816 |
sizeof(BDRVRawState),
|
817 |
NULL, /* no probe for protocols */ |
818 |
raw_open, |
819 |
NULL,
|
820 |
NULL,
|
821 |
raw_close, |
822 |
raw_create, |
823 |
raw_flush, |
824 |
|
825 |
#ifdef CONFIG_AIO
|
826 |
.bdrv_aio_read = raw_aio_read, |
827 |
.bdrv_aio_write = raw_aio_write, |
828 |
.bdrv_aio_cancel = raw_aio_cancel, |
829 |
.aiocb_size = sizeof(RawAIOCB),
|
830 |
#endif
|
831 |
|
832 |
.bdrv_pread = raw_pread, |
833 |
.bdrv_pwrite = raw_pwrite, |
834 |
.bdrv_truncate = raw_truncate, |
835 |
.bdrv_getlength = raw_getlength, |
836 |
}; |
837 |
|
838 |
/***********************************************/
|
839 |
/* host device */
|
840 |
|
841 |
#ifdef CONFIG_COCOA
|
842 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
843 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
844 |
|
845 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
846 |
{ |
847 |
kern_return_t kernResult; |
848 |
mach_port_t masterPort; |
849 |
CFMutableDictionaryRef classesToMatch; |
850 |
|
851 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
852 |
if ( KERN_SUCCESS != kernResult ) {
|
853 |
printf( "IOMasterPort returned %d\n", kernResult );
|
854 |
} |
855 |
|
856 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
857 |
if ( classesToMatch == NULL ) { |
858 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
859 |
} else {
|
860 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
861 |
} |
862 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
863 |
if ( KERN_SUCCESS != kernResult )
|
864 |
{ |
865 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
866 |
} |
867 |
|
868 |
return kernResult;
|
869 |
} |
870 |
|
871 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
872 |
{ |
873 |
io_object_t nextMedia; |
874 |
kern_return_t kernResult = KERN_FAILURE; |
875 |
*bsdPath = '\0';
|
876 |
nextMedia = IOIteratorNext( mediaIterator ); |
877 |
if ( nextMedia )
|
878 |
{ |
879 |
CFTypeRef bsdPathAsCFString; |
880 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
881 |
if ( bsdPathAsCFString ) {
|
882 |
size_t devPathLength; |
883 |
strcpy( bsdPath, _PATH_DEV ); |
884 |
strcat( bsdPath, "r" );
|
885 |
devPathLength = strlen( bsdPath ); |
886 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
887 |
kernResult = KERN_SUCCESS; |
888 |
} |
889 |
CFRelease( bsdPathAsCFString ); |
890 |
} |
891 |
IOObjectRelease( nextMedia ); |
892 |
} |
893 |
|
894 |
return kernResult;
|
895 |
} |
896 |
|
897 |
#endif
|
898 |
|
899 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
900 |
{ |
901 |
BDRVRawState *s = bs->opaque; |
902 |
int fd, open_flags, ret;
|
903 |
|
904 |
posix_aio_init(); |
905 |
|
906 |
#ifdef CONFIG_COCOA
|
907 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
908 |
kern_return_t kernResult; |
909 |
io_iterator_t mediaIterator; |
910 |
char bsdPath[ MAXPATHLEN ];
|
911 |
int fd;
|
912 |
|
913 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
914 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
915 |
|
916 |
if ( bsdPath[ 0 ] != '\0' ) { |
917 |
strcat(bsdPath,"s0");
|
918 |
/* some CDs don't have a partition 0 */
|
919 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
920 |
if (fd < 0) { |
921 |
bsdPath[strlen(bsdPath)-1] = '1'; |
922 |
} else {
|
923 |
close(fd); |
924 |
} |
925 |
filename = bsdPath; |
926 |
} |
927 |
|
928 |
if ( mediaIterator )
|
929 |
IOObjectRelease( mediaIterator ); |
930 |
} |
931 |
#endif
|
932 |
open_flags = O_BINARY; |
933 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
934 |
open_flags |= O_RDWR; |
935 |
} else {
|
936 |
open_flags |= O_RDONLY; |
937 |
bs->read_only = 1;
|
938 |
} |
939 |
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
|
940 |
* and O_DIRECT for no caching. */
|
941 |
if ((flags & BDRV_O_NOCACHE))
|
942 |
open_flags |= O_DIRECT; |
943 |
else if (!(flags & BDRV_O_CACHE_WB)) |
944 |
open_flags |= O_DSYNC; |
945 |
|
946 |
s->type = FTYPE_FILE; |
947 |
#if defined(__linux__)
|
948 |
if (strstart(filename, "/dev/cd", NULL)) { |
949 |
/* open will not fail even if no CD is inserted */
|
950 |
open_flags |= O_NONBLOCK; |
951 |
s->type = FTYPE_CD; |
952 |
} else if (strstart(filename, "/dev/fd", NULL)) { |
953 |
s->type = FTYPE_FD; |
954 |
s->fd_open_flags = open_flags; |
955 |
/* open will not fail even if no floppy is inserted */
|
956 |
open_flags |= O_NONBLOCK; |
957 |
} else if (strstart(filename, "/dev/sg", NULL)) { |
958 |
bs->sg = 1;
|
959 |
} |
960 |
#endif
|
961 |
fd = open(filename, open_flags, 0644);
|
962 |
if (fd < 0) { |
963 |
ret = -errno; |
964 |
if (ret == -EROFS)
|
965 |
ret = -EACCES; |
966 |
return ret;
|
967 |
} |
968 |
s->fd = fd; |
969 |
#if defined(__linux__)
|
970 |
/* close fd so that we can reopen it as needed */
|
971 |
if (s->type == FTYPE_FD) {
|
972 |
close(s->fd); |
973 |
s->fd = -1;
|
974 |
s->fd_media_changed = 1;
|
975 |
} |
976 |
#endif
|
977 |
return 0; |
978 |
} |
979 |
|
980 |
#if defined(__linux__)
|
981 |
/* Note: we do not have a reliable method to detect if the floppy is
|
982 |
present. The current method is to try to open the floppy at every
|
983 |
I/O and to keep it opened during a few hundreds of ms. */
|
984 |
static int fd_open(BlockDriverState *bs) |
985 |
{ |
986 |
BDRVRawState *s = bs->opaque; |
987 |
int last_media_present;
|
988 |
|
989 |
if (s->type != FTYPE_FD)
|
990 |
return 0; |
991 |
last_media_present = (s->fd >= 0);
|
992 |
if (s->fd >= 0 && |
993 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
994 |
close(s->fd); |
995 |
s->fd = -1;
|
996 |
#ifdef DEBUG_FLOPPY
|
997 |
printf("Floppy closed\n");
|
998 |
#endif
|
999 |
} |
1000 |
if (s->fd < 0) { |
1001 |
if (s->fd_got_error &&
|
1002 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
1003 |
#ifdef DEBUG_FLOPPY
|
1004 |
printf("No floppy (open delayed)\n");
|
1005 |
#endif
|
1006 |
return -EIO;
|
1007 |
} |
1008 |
s->fd = open(bs->filename, s->fd_open_flags); |
1009 |
if (s->fd < 0) { |
1010 |
s->fd_error_time = qemu_get_clock(rt_clock); |
1011 |
s->fd_got_error = 1;
|
1012 |
if (last_media_present)
|
1013 |
s->fd_media_changed = 1;
|
1014 |
#ifdef DEBUG_FLOPPY
|
1015 |
printf("No floppy\n");
|
1016 |
#endif
|
1017 |
return -EIO;
|
1018 |
} |
1019 |
#ifdef DEBUG_FLOPPY
|
1020 |
printf("Floppy opened\n");
|
1021 |
#endif
|
1022 |
} |
1023 |
if (!last_media_present)
|
1024 |
s->fd_media_changed = 1;
|
1025 |
s->fd_open_time = qemu_get_clock(rt_clock); |
1026 |
s->fd_got_error = 0;
|
1027 |
return 0; |
1028 |
} |
1029 |
|
1030 |
static int raw_is_inserted(BlockDriverState *bs) |
1031 |
{ |
1032 |
BDRVRawState *s = bs->opaque; |
1033 |
int ret;
|
1034 |
|
1035 |
switch(s->type) {
|
1036 |
case FTYPE_CD:
|
1037 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1038 |
if (ret == CDS_DISC_OK)
|
1039 |
return 1; |
1040 |
else
|
1041 |
return 0; |
1042 |
break;
|
1043 |
case FTYPE_FD:
|
1044 |
ret = fd_open(bs); |
1045 |
return (ret >= 0); |
1046 |
default:
|
1047 |
return 1; |
1048 |
} |
1049 |
} |
1050 |
|
1051 |
/* currently only used by fdc.c, but a CD version would be good too */
|
1052 |
static int raw_media_changed(BlockDriverState *bs) |
1053 |
{ |
1054 |
BDRVRawState *s = bs->opaque; |
1055 |
|
1056 |
switch(s->type) {
|
1057 |
case FTYPE_FD:
|
1058 |
{ |
1059 |
int ret;
|
1060 |
/* XXX: we do not have a true media changed indication. It
|
1061 |
does not work if the floppy is changed without trying
|
1062 |
to read it */
|
1063 |
fd_open(bs); |
1064 |
ret = s->fd_media_changed; |
1065 |
s->fd_media_changed = 0;
|
1066 |
#ifdef DEBUG_FLOPPY
|
1067 |
printf("Floppy changed=%d\n", ret);
|
1068 |
#endif
|
1069 |
return ret;
|
1070 |
} |
1071 |
default:
|
1072 |
return -ENOTSUP;
|
1073 |
} |
1074 |
} |
1075 |
|
1076 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1077 |
{ |
1078 |
BDRVRawState *s = bs->opaque; |
1079 |
|
1080 |
switch(s->type) {
|
1081 |
case FTYPE_CD:
|
1082 |
if (eject_flag) {
|
1083 |
if (ioctl (s->fd, CDROMEJECT, NULL) < 0) |
1084 |
perror("CDROMEJECT");
|
1085 |
} else {
|
1086 |
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0) |
1087 |
perror("CDROMEJECT");
|
1088 |
} |
1089 |
break;
|
1090 |
case FTYPE_FD:
|
1091 |
{ |
1092 |
int fd;
|
1093 |
if (s->fd >= 0) { |
1094 |
close(s->fd); |
1095 |
s->fd = -1;
|
1096 |
} |
1097 |
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK); |
1098 |
if (fd >= 0) { |
1099 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1100 |
perror("FDEJECT");
|
1101 |
close(fd); |
1102 |
} |
1103 |
} |
1104 |
break;
|
1105 |
default:
|
1106 |
return -ENOTSUP;
|
1107 |
} |
1108 |
return 0; |
1109 |
} |
1110 |
|
1111 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1112 |
{ |
1113 |
BDRVRawState *s = bs->opaque; |
1114 |
|
1115 |
switch(s->type) {
|
1116 |
case FTYPE_CD:
|
1117 |
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1118 |
/* Note: an error can happen if the distribution automatically
|
1119 |
mounts the CD-ROM */
|
1120 |
// perror("CDROM_LOCKDOOR");
|
1121 |
} |
1122 |
break;
|
1123 |
default:
|
1124 |
return -ENOTSUP;
|
1125 |
} |
1126 |
return 0; |
1127 |
} |
1128 |
|
1129 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1130 |
{ |
1131 |
BDRVRawState *s = bs->opaque; |
1132 |
|
1133 |
return ioctl(s->fd, req, buf);
|
1134 |
} |
1135 |
#else
|
1136 |
|
1137 |
static int fd_open(BlockDriverState *bs) |
1138 |
{ |
1139 |
return 0; |
1140 |
} |
1141 |
|
1142 |
static int raw_is_inserted(BlockDriverState *bs) |
1143 |
{ |
1144 |
return 1; |
1145 |
} |
1146 |
|
1147 |
static int raw_media_changed(BlockDriverState *bs) |
1148 |
{ |
1149 |
return -ENOTSUP;
|
1150 |
} |
1151 |
|
1152 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1153 |
{ |
1154 |
return -ENOTSUP;
|
1155 |
} |
1156 |
|
1157 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1158 |
{ |
1159 |
return -ENOTSUP;
|
1160 |
} |
1161 |
|
1162 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1163 |
{ |
1164 |
return -ENOTSUP;
|
1165 |
} |
1166 |
#endif /* !linux */ |
1167 |
|
1168 |
BlockDriver bdrv_host_device = { |
1169 |
"host_device",
|
1170 |
sizeof(BDRVRawState),
|
1171 |
NULL, /* no probe for protocols */ |
1172 |
hdev_open, |
1173 |
NULL,
|
1174 |
NULL,
|
1175 |
raw_close, |
1176 |
NULL,
|
1177 |
raw_flush, |
1178 |
|
1179 |
#ifdef CONFIG_AIO
|
1180 |
.bdrv_aio_read = raw_aio_read, |
1181 |
.bdrv_aio_write = raw_aio_write, |
1182 |
.bdrv_aio_cancel = raw_aio_cancel, |
1183 |
.aiocb_size = sizeof(RawAIOCB),
|
1184 |
#endif
|
1185 |
|
1186 |
.bdrv_pread = raw_pread, |
1187 |
.bdrv_pwrite = raw_pwrite, |
1188 |
.bdrv_getlength = raw_getlength, |
1189 |
|
1190 |
/* removable device support */
|
1191 |
.bdrv_is_inserted = raw_is_inserted, |
1192 |
.bdrv_media_changed = raw_media_changed, |
1193 |
.bdrv_eject = raw_eject, |
1194 |
.bdrv_set_locked = raw_set_locked, |
1195 |
/* generic scsi device */
|
1196 |
.bdrv_ioctl = raw_ioctl, |
1197 |
}; |