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/*
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* Block driver for RAW files (posix)
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h" |
25 |
#ifndef QEMU_IMG
|
26 |
#include "qemu-timer.h" |
27 |
#include "exec-all.h" |
28 |
#endif
|
29 |
#include "block_int.h" |
30 |
#include <assert.h> |
31 |
#include <aio.h> |
32 |
|
33 |
#ifdef CONFIG_COCOA
|
34 |
#include <paths.h> |
35 |
#include <sys/param.h> |
36 |
#include <IOKit/IOKitLib.h> |
37 |
#include <IOKit/IOBSD.h> |
38 |
#include <IOKit/storage/IOMediaBSDClient.h> |
39 |
#include <IOKit/storage/IOMedia.h> |
40 |
#include <IOKit/storage/IOCDMedia.h> |
41 |
//#include <IOKit/storage/IOCDTypes.h>
|
42 |
#include <CoreFoundation/CoreFoundation.h> |
43 |
#endif
|
44 |
|
45 |
#ifdef __sun__
|
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#define _POSIX_PTHREAD_SEMANTICS 1 |
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#include <signal.h> |
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#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 <sys/disk.h> |
57 |
#endif
|
58 |
|
59 |
//#define DEBUG_FLOPPY
|
60 |
|
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//#define DEBUG_BLOCK
|
62 |
#if defined(DEBUG_BLOCK) && !defined(QEMU_IMG)
|
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#define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \ |
64 |
{ fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0) |
65 |
#else
|
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#define DEBUG_BLOCK_PRINT(formatCstr, args...)
|
67 |
#endif
|
68 |
|
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#define FTYPE_FILE 0 |
70 |
#define FTYPE_CD 1 |
71 |
#define FTYPE_FD 2 |
72 |
|
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#define ALIGNED_BUFFER_SIZE (32 * 512) |
74 |
|
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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 |
78 |
|
79 |
typedef struct BDRVRawState { |
80 |
int fd;
|
81 |
int type;
|
82 |
unsigned int lseek_err_cnt; |
83 |
#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; |
87 |
int64_t fd_error_time; |
88 |
int fd_got_error;
|
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int fd_media_changed;
|
90 |
#endif
|
91 |
#if defined(O_DIRECT) && !defined(QEMU_IMG)
|
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uint8_t* aligned_buf; |
93 |
#endif
|
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} BDRVRawState; |
95 |
|
96 |
static int fd_open(BlockDriverState *bs); |
97 |
|
98 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
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{ |
100 |
BDRVRawState *s = bs->opaque; |
101 |
int fd, open_flags, ret;
|
102 |
|
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s->lseek_err_cnt = 0;
|
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|
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open_flags = O_BINARY; |
106 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
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open_flags |= O_RDWR; |
108 |
} else {
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open_flags |= O_RDONLY; |
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bs->read_only = 1;
|
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} |
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if (flags & BDRV_O_CREAT)
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open_flags |= O_CREAT | O_TRUNC; |
114 |
#ifdef O_DIRECT
|
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if (flags & BDRV_O_DIRECT)
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open_flags |= O_DIRECT; |
117 |
#endif
|
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|
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s->type = FTYPE_FILE; |
120 |
|
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fd = open(filename, open_flags, 0644);
|
122 |
if (fd < 0) { |
123 |
ret = -errno; |
124 |
if (ret == -EROFS)
|
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ret = -EACCES; |
126 |
return ret;
|
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} |
128 |
s->fd = fd; |
129 |
#if defined(O_DIRECT) && !defined(QEMU_IMG)
|
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s->aligned_buf = NULL;
|
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if (flags & BDRV_O_DIRECT) {
|
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s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
|
133 |
if (s->aligned_buf == NULL) { |
134 |
ret = -errno; |
135 |
close(fd); |
136 |
return ret;
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} |
138 |
} |
139 |
#endif
|
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return 0; |
141 |
} |
142 |
|
143 |
/* XXX: use host sector size if necessary with:
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144 |
#ifdef DIOCGSECTORSIZE
|
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{
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146 |
unsigned int sectorsize = 512;
|
147 |
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
|
148 |
sectorsize > bufsize)
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bufsize = sectorsize;
|
150 |
}
|
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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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|
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/*
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* offset and count are in bytes, but must be multiples of 512 for files
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* opened with O_DIRECT. buf must be aligned to 512 bytes then.
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*
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* This function may be called without alignment if the caller ensures
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* 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, |
168 |
uint8_t *buf, int count)
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{ |
170 |
BDRVRawState *s = bs->opaque; |
171 |
int ret;
|
172 |
|
173 |
ret = fd_open(bs); |
174 |
if (ret < 0) |
175 |
return ret;
|
176 |
|
177 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
178 |
++(s->lseek_err_cnt); |
179 |
if(s->lseek_err_cnt <= 10) { |
180 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
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"] lseek failed : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
183 |
bs->total_sectors, errno, strerror(errno)); |
184 |
} |
185 |
return -1; |
186 |
} |
187 |
s->lseek_err_cnt=0;
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188 |
|
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ret = read(s->fd, buf, count); |
190 |
if (ret == count)
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goto label__raw_read__success;
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192 |
|
193 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
194 |
"] read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
196 |
bs->total_sectors, ret, errno, strerror(errno)); |
197 |
|
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/* Try harder for CDrom. */
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if (bs->type == BDRV_TYPE_CDROM) {
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lseek(s->fd, offset, SEEK_SET); |
201 |
ret = read(s->fd, buf, count); |
202 |
if (ret == count)
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goto label__raw_read__success;
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lseek(s->fd, offset, SEEK_SET); |
205 |
ret = read(s->fd, buf, count); |
206 |
if (ret == count)
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goto label__raw_read__success;
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208 |
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209 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
210 |
"] retry read failed %d : %d = %s\n",
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211 |
s->fd, bs->filename, offset, buf, count, |
212 |
bs->total_sectors, ret, errno, strerror(errno)); |
213 |
} |
214 |
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label__raw_read__success:
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216 |
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217 |
return ret;
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} |
219 |
|
220 |
/*
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* offset and count are in bytes, but must be multiples of 512 for files
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* opened with O_DIRECT. buf must be aligned to 512 bytes then.
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223 |
*
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224 |
* This function may be called without alignment if the caller ensures
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* that O_DIRECT is not in effect.
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*/
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static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
228 |
const uint8_t *buf, int count) |
229 |
{ |
230 |
BDRVRawState *s = bs->opaque; |
231 |
int ret;
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232 |
|
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ret = fd_open(bs); |
234 |
if (ret < 0) |
235 |
return ret;
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236 |
|
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if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
238 |
++(s->lseek_err_cnt); |
239 |
if(s->lseek_err_cnt) {
|
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DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
241 |
PRId64 "] lseek failed : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
243 |
bs->total_sectors, errno, strerror(errno)); |
244 |
} |
245 |
return -1; |
246 |
} |
247 |
s->lseek_err_cnt = 0;
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248 |
|
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ret = write(s->fd, buf, count); |
250 |
if (ret == count)
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goto label__raw_write__success;
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|
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DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
254 |
"] write failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
256 |
bs->total_sectors, ret, errno, strerror(errno)); |
257 |
|
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label__raw_write__success:
|
259 |
|
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return ret;
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} |
262 |
|
263 |
|
264 |
#if defined(O_DIRECT) && !defined(QEMU_IMG)
|
265 |
/*
|
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* offset and count are in bytes and possibly not aligned. For files opened
|
267 |
* with O_DIRECT, necessary alignments are ensured before calling
|
268 |
* raw_pread_aligned to do the actual read.
|
269 |
*/
|
270 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
271 |
uint8_t *buf, int count)
|
272 |
{ |
273 |
BDRVRawState *s = bs->opaque; |
274 |
int size, ret, shift, sum;
|
275 |
|
276 |
sum = 0;
|
277 |
|
278 |
if (s->aligned_buf != NULL) { |
279 |
|
280 |
if (offset & 0x1ff) { |
281 |
/* align offset on a 512 bytes boundary */
|
282 |
|
283 |
shift = offset & 0x1ff;
|
284 |
size = (shift + count + 0x1ff) & ~0x1ff; |
285 |
if (size > ALIGNED_BUFFER_SIZE)
|
286 |
size = ALIGNED_BUFFER_SIZE; |
287 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
288 |
if (ret < 0) |
289 |
return ret;
|
290 |
|
291 |
size = 512 - shift;
|
292 |
if (size > count)
|
293 |
size = count; |
294 |
memcpy(buf, s->aligned_buf + shift, size); |
295 |
|
296 |
buf += size; |
297 |
offset += size; |
298 |
count -= size; |
299 |
sum += size; |
300 |
|
301 |
if (count == 0) |
302 |
return sum;
|
303 |
} |
304 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
305 |
|
306 |
/* read on aligned buffer */
|
307 |
|
308 |
while (count) {
|
309 |
|
310 |
size = (count + 0x1ff) & ~0x1ff; |
311 |
if (size > ALIGNED_BUFFER_SIZE)
|
312 |
size = ALIGNED_BUFFER_SIZE; |
313 |
|
314 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
315 |
if (ret < 0) |
316 |
return ret;
|
317 |
|
318 |
size = ret; |
319 |
if (size > count)
|
320 |
size = count; |
321 |
|
322 |
memcpy(buf, s->aligned_buf, size); |
323 |
|
324 |
buf += size; |
325 |
offset += size; |
326 |
count -= size; |
327 |
sum += size; |
328 |
} |
329 |
|
330 |
return sum;
|
331 |
} |
332 |
} |
333 |
|
334 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
335 |
} |
336 |
|
337 |
/*
|
338 |
* offset and count are in bytes and possibly not aligned. For files opened
|
339 |
* with O_DIRECT, necessary alignments are ensured before calling
|
340 |
* raw_pwrite_aligned to do the actual write.
|
341 |
*/
|
342 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
343 |
const uint8_t *buf, int count) |
344 |
{ |
345 |
BDRVRawState *s = bs->opaque; |
346 |
int size, ret, shift, sum;
|
347 |
|
348 |
sum = 0;
|
349 |
|
350 |
if (s->aligned_buf != NULL) { |
351 |
|
352 |
if (offset & 0x1ff) { |
353 |
/* align offset on a 512 bytes boundary */
|
354 |
shift = offset & 0x1ff;
|
355 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
356 |
if (ret < 0) |
357 |
return ret;
|
358 |
|
359 |
size = 512 - shift;
|
360 |
if (size > count)
|
361 |
size = count; |
362 |
memcpy(s->aligned_buf + shift, buf, size); |
363 |
|
364 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
365 |
if (ret < 0) |
366 |
return ret;
|
367 |
|
368 |
buf += size; |
369 |
offset += size; |
370 |
count -= size; |
371 |
sum += size; |
372 |
|
373 |
if (count == 0) |
374 |
return sum;
|
375 |
} |
376 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
377 |
|
378 |
while ((size = (count & ~0x1ff)) != 0) { |
379 |
|
380 |
if (size > ALIGNED_BUFFER_SIZE)
|
381 |
size = ALIGNED_BUFFER_SIZE; |
382 |
|
383 |
memcpy(s->aligned_buf, buf, size); |
384 |
|
385 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
386 |
if (ret < 0) |
387 |
return ret;
|
388 |
|
389 |
buf += ret; |
390 |
offset += ret; |
391 |
count -= ret; |
392 |
sum += ret; |
393 |
} |
394 |
/* here, count < 512 because (count & ~0x1ff) == 0 */
|
395 |
if (count) {
|
396 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
397 |
if (ret < 0) |
398 |
return ret;
|
399 |
memcpy(s->aligned_buf, buf, count); |
400 |
|
401 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
402 |
if (ret < 0) |
403 |
return ret;
|
404 |
if (count < ret)
|
405 |
ret = count; |
406 |
|
407 |
sum += ret; |
408 |
} |
409 |
return sum;
|
410 |
} |
411 |
} |
412 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
413 |
} |
414 |
|
415 |
#else
|
416 |
#define raw_pread raw_pread_aligned
|
417 |
#define raw_pwrite raw_pwrite_aligned
|
418 |
#endif
|
419 |
|
420 |
|
421 |
/***********************************************************/
|
422 |
/* Unix AIO using POSIX AIO */
|
423 |
|
424 |
typedef struct RawAIOCB { |
425 |
BlockDriverAIOCB common; |
426 |
struct aiocb aiocb;
|
427 |
struct RawAIOCB *next;
|
428 |
int ret;
|
429 |
} RawAIOCB; |
430 |
|
431 |
static int aio_sig_num = SIGUSR2; |
432 |
static RawAIOCB *first_aio; /* AIO issued */ |
433 |
static int aio_initialized = 0; |
434 |
|
435 |
static void aio_signal_handler(int signum) |
436 |
{ |
437 |
#ifndef QEMU_IMG
|
438 |
CPUState *env = cpu_single_env; |
439 |
if (env) {
|
440 |
/* stop the currently executing cpu because a timer occured */
|
441 |
cpu_interrupt(env, CPU_INTERRUPT_EXIT); |
442 |
#ifdef USE_KQEMU
|
443 |
if (env->kqemu_enabled) {
|
444 |
kqemu_cpu_interrupt(env); |
445 |
} |
446 |
#endif
|
447 |
} |
448 |
#endif
|
449 |
} |
450 |
|
451 |
void qemu_aio_init(void) |
452 |
{ |
453 |
struct sigaction act;
|
454 |
|
455 |
aio_initialized = 1;
|
456 |
|
457 |
sigfillset(&act.sa_mask); |
458 |
act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
459 |
act.sa_handler = aio_signal_handler; |
460 |
sigaction(aio_sig_num, &act, NULL);
|
461 |
|
462 |
#if defined(__GLIBC__) && defined(__linux__)
|
463 |
{ |
464 |
/* XXX: aio thread exit seems to hang on RedHat 9 and this init
|
465 |
seems to fix the problem. */
|
466 |
struct aioinit ai;
|
467 |
memset(&ai, 0, sizeof(ai)); |
468 |
ai.aio_threads = 1;
|
469 |
ai.aio_num = 1;
|
470 |
ai.aio_idle_time = 365 * 100000; |
471 |
aio_init(&ai); |
472 |
} |
473 |
#endif
|
474 |
} |
475 |
|
476 |
void qemu_aio_poll(void) |
477 |
{ |
478 |
RawAIOCB *acb, **pacb; |
479 |
int ret;
|
480 |
|
481 |
for(;;) {
|
482 |
pacb = &first_aio; |
483 |
for(;;) {
|
484 |
acb = *pacb; |
485 |
if (!acb)
|
486 |
goto the_end;
|
487 |
ret = aio_error(&acb->aiocb); |
488 |
if (ret == ECANCELED) {
|
489 |
/* remove the request */
|
490 |
*pacb = acb->next; |
491 |
qemu_aio_release(acb); |
492 |
} else if (ret != EINPROGRESS) { |
493 |
/* end of aio */
|
494 |
if (ret == 0) { |
495 |
ret = aio_return(&acb->aiocb); |
496 |
if (ret == acb->aiocb.aio_nbytes)
|
497 |
ret = 0;
|
498 |
else
|
499 |
ret = -EINVAL; |
500 |
} else {
|
501 |
ret = -ret; |
502 |
} |
503 |
/* remove the request */
|
504 |
*pacb = acb->next; |
505 |
/* call the callback */
|
506 |
acb->common.cb(acb->common.opaque, ret); |
507 |
qemu_aio_release(acb); |
508 |
break;
|
509 |
} else {
|
510 |
pacb = &acb->next; |
511 |
} |
512 |
} |
513 |
} |
514 |
the_end: ;
|
515 |
} |
516 |
|
517 |
/* Wait for all IO requests to complete. */
|
518 |
void qemu_aio_flush(void) |
519 |
{ |
520 |
qemu_aio_wait_start(); |
521 |
qemu_aio_poll(); |
522 |
while (first_aio) {
|
523 |
qemu_aio_wait(); |
524 |
} |
525 |
qemu_aio_wait_end(); |
526 |
} |
527 |
|
528 |
/* wait until at least one AIO was handled */
|
529 |
static sigset_t wait_oset;
|
530 |
|
531 |
void qemu_aio_wait_start(void) |
532 |
{ |
533 |
sigset_t set; |
534 |
|
535 |
if (!aio_initialized)
|
536 |
qemu_aio_init(); |
537 |
sigemptyset(&set); |
538 |
sigaddset(&set, aio_sig_num); |
539 |
sigprocmask(SIG_BLOCK, &set, &wait_oset); |
540 |
} |
541 |
|
542 |
void qemu_aio_wait(void) |
543 |
{ |
544 |
sigset_t set; |
545 |
int nb_sigs;
|
546 |
|
547 |
#ifndef QEMU_IMG
|
548 |
if (qemu_bh_poll())
|
549 |
return;
|
550 |
#endif
|
551 |
sigemptyset(&set); |
552 |
sigaddset(&set, aio_sig_num); |
553 |
sigwait(&set, &nb_sigs); |
554 |
qemu_aio_poll(); |
555 |
} |
556 |
|
557 |
void qemu_aio_wait_end(void) |
558 |
{ |
559 |
sigprocmask(SIG_SETMASK, &wait_oset, NULL);
|
560 |
} |
561 |
|
562 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
563 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
564 |
BlockDriverCompletionFunc *cb, void *opaque)
|
565 |
{ |
566 |
BDRVRawState *s = bs->opaque; |
567 |
RawAIOCB *acb; |
568 |
|
569 |
if (fd_open(bs) < 0) |
570 |
return NULL; |
571 |
|
572 |
acb = qemu_aio_get(bs, cb, opaque); |
573 |
if (!acb)
|
574 |
return NULL; |
575 |
acb->aiocb.aio_fildes = s->fd; |
576 |
acb->aiocb.aio_sigevent.sigev_signo = aio_sig_num; |
577 |
acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; |
578 |
acb->aiocb.aio_buf = buf; |
579 |
if (nb_sectors < 0) |
580 |
acb->aiocb.aio_nbytes = -nb_sectors; |
581 |
else
|
582 |
acb->aiocb.aio_nbytes = nb_sectors * 512;
|
583 |
acb->aiocb.aio_offset = sector_num * 512;
|
584 |
acb->next = first_aio; |
585 |
first_aio = acb; |
586 |
return acb;
|
587 |
} |
588 |
|
589 |
#ifndef QEMU_IMG
|
590 |
static void raw_aio_em_cb(void* opaque) |
591 |
{ |
592 |
RawAIOCB *acb = opaque; |
593 |
acb->common.cb(acb->common.opaque, acb->ret); |
594 |
qemu_aio_release(acb); |
595 |
} |
596 |
#endif
|
597 |
|
598 |
static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
599 |
int64_t sector_num, uint8_t *buf, int nb_sectors,
|
600 |
BlockDriverCompletionFunc *cb, void *opaque)
|
601 |
{ |
602 |
RawAIOCB *acb; |
603 |
|
604 |
/*
|
605 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
606 |
* to synchronous IO.
|
607 |
*/
|
608 |
#if defined(O_DIRECT) && !defined(QEMU_IMG)
|
609 |
BDRVRawState *s = bs->opaque; |
610 |
|
611 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
612 |
QEMUBH *bh; |
613 |
acb = qemu_aio_get(bs, cb, opaque); |
614 |
acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors); |
615 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
616 |
qemu_bh_schedule(bh); |
617 |
return &acb->common;
|
618 |
} |
619 |
#endif
|
620 |
|
621 |
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
622 |
if (!acb)
|
623 |
return NULL; |
624 |
if (aio_read(&acb->aiocb) < 0) { |
625 |
qemu_aio_release(acb); |
626 |
return NULL; |
627 |
} |
628 |
return &acb->common;
|
629 |
} |
630 |
|
631 |
static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
632 |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
633 |
BlockDriverCompletionFunc *cb, void *opaque)
|
634 |
{ |
635 |
RawAIOCB *acb; |
636 |
|
637 |
/*
|
638 |
* If O_DIRECT is used and the buffer is not aligned fall back
|
639 |
* to synchronous IO.
|
640 |
*/
|
641 |
#if defined(O_DIRECT) && !defined(QEMU_IMG)
|
642 |
BDRVRawState *s = bs->opaque; |
643 |
|
644 |
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
645 |
QEMUBH *bh; |
646 |
acb = qemu_aio_get(bs, cb, opaque); |
647 |
acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors); |
648 |
bh = qemu_bh_new(raw_aio_em_cb, acb); |
649 |
qemu_bh_schedule(bh); |
650 |
return &acb->common;
|
651 |
} |
652 |
#endif
|
653 |
|
654 |
acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque); |
655 |
if (!acb)
|
656 |
return NULL; |
657 |
if (aio_write(&acb->aiocb) < 0) { |
658 |
qemu_aio_release(acb); |
659 |
return NULL; |
660 |
} |
661 |
return &acb->common;
|
662 |
} |
663 |
|
664 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
665 |
{ |
666 |
int ret;
|
667 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
668 |
RawAIOCB **pacb; |
669 |
|
670 |
ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
671 |
if (ret == AIO_NOTCANCELED) {
|
672 |
/* fail safe: if the aio could not be canceled, we wait for
|
673 |
it */
|
674 |
while (aio_error(&acb->aiocb) == EINPROGRESS);
|
675 |
} |
676 |
|
677 |
/* remove the callback from the queue */
|
678 |
pacb = &first_aio; |
679 |
for(;;) {
|
680 |
if (*pacb == NULL) { |
681 |
break;
|
682 |
} else if (*pacb == acb) { |
683 |
*pacb = acb->next; |
684 |
qemu_aio_release(acb); |
685 |
break;
|
686 |
} |
687 |
pacb = &acb->next; |
688 |
} |
689 |
} |
690 |
|
691 |
static void raw_close(BlockDriverState *bs) |
692 |
{ |
693 |
BDRVRawState *s = bs->opaque; |
694 |
if (s->fd >= 0) { |
695 |
close(s->fd); |
696 |
s->fd = -1;
|
697 |
#if defined(O_DIRECT) && !defined(QEMU_IMG)
|
698 |
if (s->aligned_buf != NULL) |
699 |
qemu_free(s->aligned_buf); |
700 |
#endif
|
701 |
} |
702 |
} |
703 |
|
704 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
705 |
{ |
706 |
BDRVRawState *s = bs->opaque; |
707 |
if (s->type != FTYPE_FILE)
|
708 |
return -ENOTSUP;
|
709 |
if (ftruncate(s->fd, offset) < 0) |
710 |
return -errno;
|
711 |
return 0; |
712 |
} |
713 |
|
714 |
static int64_t raw_getlength(BlockDriverState *bs)
|
715 |
{ |
716 |
BDRVRawState *s = bs->opaque; |
717 |
int fd = s->fd;
|
718 |
int64_t size; |
719 |
#ifdef _BSD
|
720 |
struct stat sb;
|
721 |
#endif
|
722 |
#ifdef __sun__
|
723 |
struct dk_minfo minfo;
|
724 |
int rv;
|
725 |
#endif
|
726 |
int ret;
|
727 |
|
728 |
ret = fd_open(bs); |
729 |
if (ret < 0) |
730 |
return ret;
|
731 |
|
732 |
#ifdef _BSD
|
733 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
734 |
#ifdef DIOCGMEDIASIZE
|
735 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
736 |
#endif
|
737 |
#ifdef CONFIG_COCOA
|
738 |
size = LONG_LONG_MAX; |
739 |
#else
|
740 |
size = lseek(fd, 0LL, SEEK_END);
|
741 |
#endif
|
742 |
} else
|
743 |
#endif
|
744 |
#ifdef __sun__
|
745 |
/*
|
746 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
747 |
*/
|
748 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
749 |
if ( rv != -1 ) { |
750 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
751 |
} else /* there are reports that lseek on some devices |
752 |
fails, but irc discussion said that contingency
|
753 |
on contingency was overkill */
|
754 |
#endif
|
755 |
{ |
756 |
size = lseek(fd, 0, SEEK_END);
|
757 |
} |
758 |
return size;
|
759 |
} |
760 |
|
761 |
static int raw_create(const char *filename, int64_t total_size, |
762 |
const char *backing_file, int flags) |
763 |
{ |
764 |
int fd;
|
765 |
|
766 |
if (flags || backing_file)
|
767 |
return -ENOTSUP;
|
768 |
|
769 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
770 |
0644);
|
771 |
if (fd < 0) |
772 |
return -EIO;
|
773 |
ftruncate(fd, total_size * 512);
|
774 |
close(fd); |
775 |
return 0; |
776 |
} |
777 |
|
778 |
static void raw_flush(BlockDriverState *bs) |
779 |
{ |
780 |
BDRVRawState *s = bs->opaque; |
781 |
fsync(s->fd); |
782 |
} |
783 |
|
784 |
BlockDriver bdrv_raw = { |
785 |
"raw",
|
786 |
sizeof(BDRVRawState),
|
787 |
NULL, /* no probe for protocols */ |
788 |
raw_open, |
789 |
NULL,
|
790 |
NULL,
|
791 |
raw_close, |
792 |
raw_create, |
793 |
raw_flush, |
794 |
|
795 |
.bdrv_aio_read = raw_aio_read, |
796 |
.bdrv_aio_write = raw_aio_write, |
797 |
.bdrv_aio_cancel = raw_aio_cancel, |
798 |
.aiocb_size = sizeof(RawAIOCB),
|
799 |
.protocol_name = "file",
|
800 |
.bdrv_pread = raw_pread, |
801 |
.bdrv_pwrite = raw_pwrite, |
802 |
.bdrv_truncate = raw_truncate, |
803 |
.bdrv_getlength = raw_getlength, |
804 |
}; |
805 |
|
806 |
/***********************************************/
|
807 |
/* host device */
|
808 |
|
809 |
#ifdef CONFIG_COCOA
|
810 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
811 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
812 |
|
813 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
814 |
{ |
815 |
kern_return_t kernResult; |
816 |
mach_port_t masterPort; |
817 |
CFMutableDictionaryRef classesToMatch; |
818 |
|
819 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
820 |
if ( KERN_SUCCESS != kernResult ) {
|
821 |
printf( "IOMasterPort returned %d\n", kernResult );
|
822 |
} |
823 |
|
824 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
825 |
if ( classesToMatch == NULL ) { |
826 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
827 |
} else {
|
828 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
829 |
} |
830 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
831 |
if ( KERN_SUCCESS != kernResult )
|
832 |
{ |
833 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
834 |
} |
835 |
|
836 |
return kernResult;
|
837 |
} |
838 |
|
839 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
840 |
{ |
841 |
io_object_t nextMedia; |
842 |
kern_return_t kernResult = KERN_FAILURE; |
843 |
*bsdPath = '\0';
|
844 |
nextMedia = IOIteratorNext( mediaIterator ); |
845 |
if ( nextMedia )
|
846 |
{ |
847 |
CFTypeRef bsdPathAsCFString; |
848 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
849 |
if ( bsdPathAsCFString ) {
|
850 |
size_t devPathLength; |
851 |
strcpy( bsdPath, _PATH_DEV ); |
852 |
strcat( bsdPath, "r" );
|
853 |
devPathLength = strlen( bsdPath ); |
854 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
855 |
kernResult = KERN_SUCCESS; |
856 |
} |
857 |
CFRelease( bsdPathAsCFString ); |
858 |
} |
859 |
IOObjectRelease( nextMedia ); |
860 |
} |
861 |
|
862 |
return kernResult;
|
863 |
} |
864 |
|
865 |
#endif
|
866 |
|
867 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
868 |
{ |
869 |
BDRVRawState *s = bs->opaque; |
870 |
int fd, open_flags, ret;
|
871 |
|
872 |
#ifdef CONFIG_COCOA
|
873 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
874 |
kern_return_t kernResult; |
875 |
io_iterator_t mediaIterator; |
876 |
char bsdPath[ MAXPATHLEN ];
|
877 |
int fd;
|
878 |
|
879 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
880 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
881 |
|
882 |
if ( bsdPath[ 0 ] != '\0' ) { |
883 |
strcat(bsdPath,"s0");
|
884 |
/* some CDs don't have a partition 0 */
|
885 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
886 |
if (fd < 0) { |
887 |
bsdPath[strlen(bsdPath)-1] = '1'; |
888 |
} else {
|
889 |
close(fd); |
890 |
} |
891 |
filename = bsdPath; |
892 |
} |
893 |
|
894 |
if ( mediaIterator )
|
895 |
IOObjectRelease( mediaIterator ); |
896 |
} |
897 |
#endif
|
898 |
open_flags = O_BINARY; |
899 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
900 |
open_flags |= O_RDWR; |
901 |
} else {
|
902 |
open_flags |= O_RDONLY; |
903 |
bs->read_only = 1;
|
904 |
} |
905 |
#ifdef O_DIRECT
|
906 |
if (flags & BDRV_O_DIRECT)
|
907 |
open_flags |= O_DIRECT; |
908 |
#endif
|
909 |
|
910 |
s->type = FTYPE_FILE; |
911 |
#if defined(__linux__)
|
912 |
if (strstart(filename, "/dev/cd", NULL)) { |
913 |
/* open will not fail even if no CD is inserted */
|
914 |
open_flags |= O_NONBLOCK; |
915 |
s->type = FTYPE_CD; |
916 |
} else if (strstart(filename, "/dev/fd", NULL)) { |
917 |
s->type = FTYPE_FD; |
918 |
s->fd_open_flags = open_flags; |
919 |
/* open will not fail even if no floppy is inserted */
|
920 |
open_flags |= O_NONBLOCK; |
921 |
} else if (strstart(filename, "/dev/sg", NULL)) { |
922 |
bs->sg = 1;
|
923 |
} |
924 |
#endif
|
925 |
fd = open(filename, open_flags, 0644);
|
926 |
if (fd < 0) { |
927 |
ret = -errno; |
928 |
if (ret == -EROFS)
|
929 |
ret = -EACCES; |
930 |
return ret;
|
931 |
} |
932 |
s->fd = fd; |
933 |
#if defined(__linux__)
|
934 |
/* close fd so that we can reopen it as needed */
|
935 |
if (s->type == FTYPE_FD) {
|
936 |
close(s->fd); |
937 |
s->fd = -1;
|
938 |
s->fd_media_changed = 1;
|
939 |
} |
940 |
#endif
|
941 |
return 0; |
942 |
} |
943 |
|
944 |
#if defined(__linux__) && !defined(QEMU_IMG)
|
945 |
|
946 |
/* Note: we do not have a reliable method to detect if the floppy is
|
947 |
present. The current method is to try to open the floppy at every
|
948 |
I/O and to keep it opened during a few hundreds of ms. */
|
949 |
static int fd_open(BlockDriverState *bs) |
950 |
{ |
951 |
BDRVRawState *s = bs->opaque; |
952 |
int last_media_present;
|
953 |
|
954 |
if (s->type != FTYPE_FD)
|
955 |
return 0; |
956 |
last_media_present = (s->fd >= 0);
|
957 |
if (s->fd >= 0 && |
958 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
959 |
close(s->fd); |
960 |
s->fd = -1;
|
961 |
#ifdef DEBUG_FLOPPY
|
962 |
printf("Floppy closed\n");
|
963 |
#endif
|
964 |
} |
965 |
if (s->fd < 0) { |
966 |
if (s->fd_got_error &&
|
967 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
968 |
#ifdef DEBUG_FLOPPY
|
969 |
printf("No floppy (open delayed)\n");
|
970 |
#endif
|
971 |
return -EIO;
|
972 |
} |
973 |
s->fd = open(bs->filename, s->fd_open_flags); |
974 |
if (s->fd < 0) { |
975 |
s->fd_error_time = qemu_get_clock(rt_clock); |
976 |
s->fd_got_error = 1;
|
977 |
if (last_media_present)
|
978 |
s->fd_media_changed = 1;
|
979 |
#ifdef DEBUG_FLOPPY
|
980 |
printf("No floppy\n");
|
981 |
#endif
|
982 |
return -EIO;
|
983 |
} |
984 |
#ifdef DEBUG_FLOPPY
|
985 |
printf("Floppy opened\n");
|
986 |
#endif
|
987 |
} |
988 |
if (!last_media_present)
|
989 |
s->fd_media_changed = 1;
|
990 |
s->fd_open_time = qemu_get_clock(rt_clock); |
991 |
s->fd_got_error = 0;
|
992 |
return 0; |
993 |
} |
994 |
#else
|
995 |
static int fd_open(BlockDriverState *bs) |
996 |
{ |
997 |
return 0; |
998 |
} |
999 |
#endif
|
1000 |
|
1001 |
#if defined(__linux__)
|
1002 |
|
1003 |
static int raw_is_inserted(BlockDriverState *bs) |
1004 |
{ |
1005 |
BDRVRawState *s = bs->opaque; |
1006 |
int ret;
|
1007 |
|
1008 |
switch(s->type) {
|
1009 |
case FTYPE_CD:
|
1010 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1011 |
if (ret == CDS_DISC_OK)
|
1012 |
return 1; |
1013 |
else
|
1014 |
return 0; |
1015 |
break;
|
1016 |
case FTYPE_FD:
|
1017 |
ret = fd_open(bs); |
1018 |
return (ret >= 0); |
1019 |
default:
|
1020 |
return 1; |
1021 |
} |
1022 |
} |
1023 |
|
1024 |
/* currently only used by fdc.c, but a CD version would be good too */
|
1025 |
static int raw_media_changed(BlockDriverState *bs) |
1026 |
{ |
1027 |
BDRVRawState *s = bs->opaque; |
1028 |
|
1029 |
switch(s->type) {
|
1030 |
case FTYPE_FD:
|
1031 |
{ |
1032 |
int ret;
|
1033 |
/* XXX: we do not have a true media changed indication. It
|
1034 |
does not work if the floppy is changed without trying
|
1035 |
to read it */
|
1036 |
fd_open(bs); |
1037 |
ret = s->fd_media_changed; |
1038 |
s->fd_media_changed = 0;
|
1039 |
#ifdef DEBUG_FLOPPY
|
1040 |
printf("Floppy changed=%d\n", ret);
|
1041 |
#endif
|
1042 |
return ret;
|
1043 |
} |
1044 |
default:
|
1045 |
return -ENOTSUP;
|
1046 |
} |
1047 |
} |
1048 |
|
1049 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1050 |
{ |
1051 |
BDRVRawState *s = bs->opaque; |
1052 |
|
1053 |
switch(s->type) {
|
1054 |
case FTYPE_CD:
|
1055 |
if (eject_flag) {
|
1056 |
if (ioctl (s->fd, CDROMEJECT, NULL) < 0) |
1057 |
perror("CDROMEJECT");
|
1058 |
} else {
|
1059 |
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0) |
1060 |
perror("CDROMEJECT");
|
1061 |
} |
1062 |
break;
|
1063 |
case FTYPE_FD:
|
1064 |
{ |
1065 |
int fd;
|
1066 |
if (s->fd >= 0) { |
1067 |
close(s->fd); |
1068 |
s->fd = -1;
|
1069 |
} |
1070 |
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK); |
1071 |
if (fd >= 0) { |
1072 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1073 |
perror("FDEJECT");
|
1074 |
close(fd); |
1075 |
} |
1076 |
} |
1077 |
break;
|
1078 |
default:
|
1079 |
return -ENOTSUP;
|
1080 |
} |
1081 |
return 0; |
1082 |
} |
1083 |
|
1084 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1085 |
{ |
1086 |
BDRVRawState *s = bs->opaque; |
1087 |
|
1088 |
switch(s->type) {
|
1089 |
case FTYPE_CD:
|
1090 |
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1091 |
/* Note: an error can happen if the distribution automatically
|
1092 |
mounts the CD-ROM */
|
1093 |
// perror("CDROM_LOCKDOOR");
|
1094 |
} |
1095 |
break;
|
1096 |
default:
|
1097 |
return -ENOTSUP;
|
1098 |
} |
1099 |
return 0; |
1100 |
} |
1101 |
|
1102 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1103 |
{ |
1104 |
BDRVRawState *s = bs->opaque; |
1105 |
|
1106 |
return ioctl(s->fd, req, buf);
|
1107 |
} |
1108 |
#else
|
1109 |
|
1110 |
static int raw_is_inserted(BlockDriverState *bs) |
1111 |
{ |
1112 |
return 1; |
1113 |
} |
1114 |
|
1115 |
static int raw_media_changed(BlockDriverState *bs) |
1116 |
{ |
1117 |
return -ENOTSUP;
|
1118 |
} |
1119 |
|
1120 |
static int raw_eject(BlockDriverState *bs, int eject_flag) |
1121 |
{ |
1122 |
return -ENOTSUP;
|
1123 |
} |
1124 |
|
1125 |
static int raw_set_locked(BlockDriverState *bs, int locked) |
1126 |
{ |
1127 |
return -ENOTSUP;
|
1128 |
} |
1129 |
|
1130 |
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1131 |
{ |
1132 |
return -ENOTSUP;
|
1133 |
} |
1134 |
#endif /* !linux */ |
1135 |
|
1136 |
BlockDriver bdrv_host_device = { |
1137 |
"host_device",
|
1138 |
sizeof(BDRVRawState),
|
1139 |
NULL, /* no probe for protocols */ |
1140 |
hdev_open, |
1141 |
NULL,
|
1142 |
NULL,
|
1143 |
raw_close, |
1144 |
NULL,
|
1145 |
raw_flush, |
1146 |
|
1147 |
.bdrv_aio_read = raw_aio_read, |
1148 |
.bdrv_aio_write = raw_aio_write, |
1149 |
.bdrv_aio_cancel = raw_aio_cancel, |
1150 |
.aiocb_size = sizeof(RawAIOCB),
|
1151 |
.bdrv_pread = raw_pread, |
1152 |
.bdrv_pwrite = raw_pwrite, |
1153 |
.bdrv_getlength = raw_getlength, |
1154 |
|
1155 |
/* removable device support */
|
1156 |
.bdrv_is_inserted = raw_is_inserted, |
1157 |
.bdrv_media_changed = raw_media_changed, |
1158 |
.bdrv_eject = raw_eject, |
1159 |
.bdrv_set_locked = raw_set_locked, |
1160 |
/* generic scsi device */
|
1161 |
.bdrv_ioctl = raw_ioctl, |
1162 |
}; |