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