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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
|
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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> |
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#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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#include <sys/cdio.h> |
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#endif
|
60 |
|
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#ifdef __OpenBSD__
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#include <sys/ioctl.h> |
63 |
#include <sys/disklabel.h> |
64 |
#include <sys/dkio.h> |
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#endif
|
66 |
|
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#ifdef __DragonFly__
|
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#include <sys/ioctl.h> |
69 |
#include <sys/diskslice.h> |
70 |
#endif
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71 |
|
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//#define DEBUG_FLOPPY
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|
74 |
//#define DEBUG_BLOCK
|
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#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 */
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#ifndef O_DSYNC
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#ifdef O_SYNC
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#define O_DSYNC O_SYNC
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#elif defined(O_FSYNC)
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#define O_DSYNC O_FSYNC
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#endif
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#endif
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90 |
|
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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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95 |
|
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#define FTYPE_FILE 0 |
97 |
#define FTYPE_CD 1 |
98 |
#define FTYPE_FD 2 |
99 |
|
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#define ALIGNED_BUFFER_SIZE (32 * 512) |
101 |
|
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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 |
105 |
|
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typedef struct BDRVRawState { |
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int fd;
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int type;
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unsigned int lseek_err_cnt; |
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int open_flags;
|
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#if defined(__linux__)
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/* linux floppy specific */
|
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int64_t fd_open_time; |
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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; |
120 |
|
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static int posix_aio_init(void); |
122 |
|
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static int fd_open(BlockDriverState *bs); |
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static int64_t raw_getlength(BlockDriverState *bs);
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|
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#if defined(__FreeBSD__)
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static int cdrom_reopen(BlockDriverState *bs); |
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#endif
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|
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static int raw_open_common(BlockDriverState *bs, const char *filename, |
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int bdrv_flags, int open_flags) |
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{ |
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BDRVRawState *s = bs->opaque; |
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int fd, ret;
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|
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posix_aio_init(); |
137 |
|
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s->lseek_err_cnt = 0;
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|
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s->open_flags = open_flags | O_BINARY; |
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s->open_flags &= ~O_ACCMODE; |
142 |
if ((bdrv_flags & BDRV_O_ACCESS) == BDRV_O_RDWR) {
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s->open_flags |= O_RDWR; |
144 |
} else {
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s->open_flags |= O_RDONLY; |
146 |
bs->read_only = 1;
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} |
148 |
|
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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 ((bdrv_flags & BDRV_O_NOCACHE))
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s->open_flags |= O_DIRECT; |
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else if (!(bdrv_flags & BDRV_O_CACHE_WB)) |
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s->open_flags |= O_DSYNC; |
155 |
|
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s->fd = -1;
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fd = open(filename, s->open_flags, 0644);
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if (fd < 0) { |
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ret = -errno; |
160 |
if (ret == -EROFS)
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ret = -EACCES; |
162 |
return ret;
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} |
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s->fd = fd; |
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s->aligned_buf = NULL;
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if ((bdrv_flags & BDRV_O_NOCACHE)) {
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s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE); |
168 |
if (s->aligned_buf == NULL) { |
169 |
ret = -errno; |
170 |
close(fd); |
171 |
return ret;
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} |
173 |
} |
174 |
return 0; |
175 |
} |
176 |
|
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static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
178 |
{ |
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BDRVRawState *s = bs->opaque; |
180 |
int open_flags = 0; |
181 |
|
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s->type = FTYPE_FILE; |
183 |
if (flags & BDRV_O_CREAT)
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open_flags = O_CREAT | O_TRUNC; |
185 |
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return raw_open_common(bs, filename, flags, open_flags);
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} |
188 |
|
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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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205 |
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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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210 |
* 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, |
214 |
uint8_t *buf, int count)
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{ |
216 |
BDRVRawState *s = bs->opaque; |
217 |
int ret;
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218 |
|
219 |
ret = fd_open(bs); |
220 |
if (ret < 0) |
221 |
return ret;
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222 |
|
223 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
224 |
++(s->lseek_err_cnt); |
225 |
if(s->lseek_err_cnt <= 10) { |
226 |
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, |
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bs->total_sectors, errno, strerror(errno)); |
230 |
} |
231 |
return -1; |
232 |
} |
233 |
s->lseek_err_cnt=0;
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ret = read(s->fd, buf, count); |
236 |
if (ret == count)
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goto label__raw_read__success;
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238 |
|
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/* Allow reads beyond the end (needed for pwrite) */
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240 |
if ((ret == 0) && bs->growable) { |
241 |
int64_t size = raw_getlength(bs); |
242 |
if (offset >= size) {
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memset(buf, 0, count);
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ret = count; |
245 |
goto label__raw_read__success;
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} |
247 |
} |
248 |
|
249 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
250 |
"] read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
252 |
bs->total_sectors, ret, errno, strerror(errno)); |
253 |
|
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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); |
257 |
ret = read(s->fd, buf, count); |
258 |
if (ret == count)
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goto label__raw_read__success;
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lseek(s->fd, offset, SEEK_SET); |
261 |
ret = read(s->fd, buf, count); |
262 |
if (ret == count)
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goto label__raw_read__success;
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264 |
|
265 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
266 |
"] retry read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
268 |
bs->total_sectors, ret, errno, strerror(errno)); |
269 |
} |
270 |
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label__raw_read__success:
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272 |
|
273 |
return (ret < 0) ? -errno : ret; |
274 |
} |
275 |
|
276 |
/*
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277 |
* offset and count are in bytes, but must be multiples of 512 for files
|
278 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
|
279 |
*
|
280 |
* This function may be called without alignment if the caller ensures
|
281 |
* that O_DIRECT is not in effect.
|
282 |
*/
|
283 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
284 |
const uint8_t *buf, int count) |
285 |
{ |
286 |
BDRVRawState *s = bs->opaque; |
287 |
int ret;
|
288 |
|
289 |
ret = fd_open(bs); |
290 |
if (ret < 0) |
291 |
return -errno;
|
292 |
|
293 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
294 |
++(s->lseek_err_cnt); |
295 |
if(s->lseek_err_cnt) {
|
296 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
297 |
PRId64 "] lseek failed : %d = %s\n",
|
298 |
s->fd, bs->filename, offset, buf, count, |
299 |
bs->total_sectors, errno, strerror(errno)); |
300 |
} |
301 |
return -EIO;
|
302 |
} |
303 |
s->lseek_err_cnt = 0;
|
304 |
|
305 |
ret = write(s->fd, buf, count); |
306 |
if (ret == count)
|
307 |
goto label__raw_write__success;
|
308 |
|
309 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
310 |
"] write failed %d : %d = %s\n",
|
311 |
s->fd, bs->filename, offset, buf, count, |
312 |
bs->total_sectors, ret, errno, strerror(errno)); |
313 |
|
314 |
label__raw_write__success:
|
315 |
|
316 |
return (ret < 0) ? -errno : ret; |
317 |
} |
318 |
|
319 |
|
320 |
/*
|
321 |
* offset and count are in bytes and possibly not aligned. For files opened
|
322 |
* with O_DIRECT, necessary alignments are ensured before calling
|
323 |
* raw_pread_aligned to do the actual read.
|
324 |
*/
|
325 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
326 |
uint8_t *buf, int count)
|
327 |
{ |
328 |
BDRVRawState *s = bs->opaque; |
329 |
int size, ret, shift, sum;
|
330 |
|
331 |
sum = 0;
|
332 |
|
333 |
if (s->aligned_buf != NULL) { |
334 |
|
335 |
if (offset & 0x1ff) { |
336 |
/* align offset on a 512 bytes boundary */
|
337 |
|
338 |
shift = offset & 0x1ff;
|
339 |
size = (shift + count + 0x1ff) & ~0x1ff; |
340 |
if (size > ALIGNED_BUFFER_SIZE)
|
341 |
size = ALIGNED_BUFFER_SIZE; |
342 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
343 |
if (ret < 0) |
344 |
return ret;
|
345 |
|
346 |
size = 512 - shift;
|
347 |
if (size > count)
|
348 |
size = count; |
349 |
memcpy(buf, s->aligned_buf + shift, size); |
350 |
|
351 |
buf += size; |
352 |
offset += size; |
353 |
count -= size; |
354 |
sum += size; |
355 |
|
356 |
if (count == 0) |
357 |
return sum;
|
358 |
} |
359 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
360 |
|
361 |
/* read on aligned buffer */
|
362 |
|
363 |
while (count) {
|
364 |
|
365 |
size = (count + 0x1ff) & ~0x1ff; |
366 |
if (size > ALIGNED_BUFFER_SIZE)
|
367 |
size = ALIGNED_BUFFER_SIZE; |
368 |
|
369 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
370 |
if (ret < 0) |
371 |
return ret;
|
372 |
|
373 |
size = ret; |
374 |
if (size > count)
|
375 |
size = count; |
376 |
|
377 |
memcpy(buf, s->aligned_buf, size); |
378 |
|
379 |
buf += size; |
380 |
offset += size; |
381 |
count -= size; |
382 |
sum += size; |
383 |
} |
384 |
|
385 |
return sum;
|
386 |
} |
387 |
} |
388 |
|
389 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
390 |
} |
391 |
|
392 |
static int raw_read(BlockDriverState *bs, int64_t sector_num, |
393 |
uint8_t *buf, int nb_sectors)
|
394 |
{ |
395 |
int ret;
|
396 |
|
397 |
ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512); |
398 |
if (ret == (nb_sectors * 512)) |
399 |
ret = 0;
|
400 |
return ret;
|
401 |
} |
402 |
|
403 |
/*
|
404 |
* offset and count are in bytes and possibly not aligned. For files opened
|
405 |
* with O_DIRECT, necessary alignments are ensured before calling
|
406 |
* raw_pwrite_aligned to do the actual write.
|
407 |
*/
|
408 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
409 |
const uint8_t *buf, int count) |
410 |
{ |
411 |
BDRVRawState *s = bs->opaque; |
412 |
int size, ret, shift, sum;
|
413 |
|
414 |
sum = 0;
|
415 |
|
416 |
if (s->aligned_buf != NULL) { |
417 |
|
418 |
if (offset & 0x1ff) { |
419 |
/* align offset on a 512 bytes boundary */
|
420 |
shift = offset & 0x1ff;
|
421 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
422 |
if (ret < 0) |
423 |
return ret;
|
424 |
|
425 |
size = 512 - shift;
|
426 |
if (size > count)
|
427 |
size = count; |
428 |
memcpy(s->aligned_buf + shift, buf, size); |
429 |
|
430 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
431 |
if (ret < 0) |
432 |
return ret;
|
433 |
|
434 |
buf += size; |
435 |
offset += size; |
436 |
count -= size; |
437 |
sum += size; |
438 |
|
439 |
if (count == 0) |
440 |
return sum;
|
441 |
} |
442 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
443 |
|
444 |
while ((size = (count & ~0x1ff)) != 0) { |
445 |
|
446 |
if (size > ALIGNED_BUFFER_SIZE)
|
447 |
size = ALIGNED_BUFFER_SIZE; |
448 |
|
449 |
memcpy(s->aligned_buf, buf, size); |
450 |
|
451 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
452 |
if (ret < 0) |
453 |
return ret;
|
454 |
|
455 |
buf += ret; |
456 |
offset += ret; |
457 |
count -= ret; |
458 |
sum += ret; |
459 |
} |
460 |
/* here, count < 512 because (count & ~0x1ff) == 0 */
|
461 |
if (count) {
|
462 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
463 |
if (ret < 0) |
464 |
return ret;
|
465 |
memcpy(s->aligned_buf, buf, count); |
466 |
|
467 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
468 |
if (ret < 0) |
469 |
return ret;
|
470 |
if (count < ret)
|
471 |
ret = count; |
472 |
|
473 |
sum += ret; |
474 |
} |
475 |
return sum;
|
476 |
} |
477 |
} |
478 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
479 |
} |
480 |
|
481 |
static int raw_write(BlockDriverState *bs, int64_t sector_num, |
482 |
const uint8_t *buf, int nb_sectors) |
483 |
{ |
484 |
int ret;
|
485 |
ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512); |
486 |
if (ret == (nb_sectors * 512)) |
487 |
ret = 0;
|
488 |
return ret;
|
489 |
} |
490 |
|
491 |
#ifdef CONFIG_AIO
|
492 |
/***********************************************************/
|
493 |
/* Unix AIO using POSIX AIO */
|
494 |
|
495 |
typedef struct RawAIOCB { |
496 |
BlockDriverAIOCB common; |
497 |
struct qemu_paiocb aiocb;
|
498 |
struct RawAIOCB *next;
|
499 |
int ret;
|
500 |
} RawAIOCB; |
501 |
|
502 |
typedef struct PosixAioState |
503 |
{ |
504 |
int rfd, wfd;
|
505 |
RawAIOCB *first_aio; |
506 |
} PosixAioState; |
507 |
|
508 |
static void posix_aio_read(void *opaque) |
509 |
{ |
510 |
PosixAioState *s = opaque; |
511 |
RawAIOCB *acb, **pacb; |
512 |
int ret;
|
513 |
ssize_t len; |
514 |
|
515 |
/* read all bytes from signal pipe */
|
516 |
for (;;) {
|
517 |
char bytes[16]; |
518 |
|
519 |
len = read(s->rfd, bytes, sizeof(bytes));
|
520 |
if (len == -1 && errno == EINTR) |
521 |
continue; /* try again */ |
522 |
if (len == sizeof(bytes)) |
523 |
continue; /* more to read */ |
524 |
break;
|
525 |
} |
526 |
|
527 |
for(;;) {
|
528 |
pacb = &s->first_aio; |
529 |
for(;;) {
|
530 |
acb = *pacb; |
531 |
if (!acb)
|
532 |
goto the_end;
|
533 |
ret = qemu_paio_error(&acb->aiocb); |
534 |
if (ret == ECANCELED) {
|
535 |
/* remove the request */
|
536 |
*pacb = acb->next; |
537 |
qemu_aio_release(acb); |
538 |
} else if (ret != EINPROGRESS) { |
539 |
/* end of aio */
|
540 |
if (ret == 0) { |
541 |
ret = qemu_paio_return(&acb->aiocb); |
542 |
if (ret == acb->aiocb.aio_nbytes)
|
543 |
ret = 0;
|
544 |
else
|
545 |
ret = -EINVAL; |
546 |
} else {
|
547 |
ret = -ret; |
548 |
} |
549 |
/* remove the request */
|
550 |
*pacb = acb->next; |
551 |
/* call the callback */
|
552 |
acb->common.cb(acb->common.opaque, ret); |
553 |
qemu_aio_release(acb); |
554 |
break;
|
555 |
} else {
|
556 |
pacb = &acb->next; |
557 |
} |
558 |
} |
559 |
} |
560 |
the_end: ;
|
561 |
} |
562 |
|
563 |
static int posix_aio_flush(void *opaque) |
564 |
{ |
565 |
PosixAioState *s = opaque; |
566 |
return !!s->first_aio;
|
567 |
} |
568 |
|
569 |
static PosixAioState *posix_aio_state;
|
570 |
|
571 |
static void aio_signal_handler(int signum) |
572 |
{ |
573 |
if (posix_aio_state) {
|
574 |
char byte = 0; |
575 |
|
576 |
write(posix_aio_state->wfd, &byte, sizeof(byte));
|
577 |
} |
578 |
|
579 |
qemu_service_io(); |
580 |
} |
581 |
|
582 |
static int posix_aio_init(void) |
583 |
{ |
584 |
struct sigaction act;
|
585 |
PosixAioState *s; |
586 |
int fds[2]; |
587 |
struct qemu_paioinit ai;
|
588 |
|
589 |
if (posix_aio_state)
|
590 |
return 0; |
591 |
|
592 |
s = qemu_malloc(sizeof(PosixAioState));
|
593 |
|
594 |
sigfillset(&act.sa_mask); |
595 |
act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
596 |
act.sa_handler = aio_signal_handler; |
597 |
sigaction(SIGUSR2, &act, NULL);
|
598 |
|
599 |
s->first_aio = NULL;
|
600 |
if (pipe(fds) == -1) { |
601 |
fprintf(stderr, "failed to create pipe\n");
|
602 |
return -errno;
|
603 |
} |
604 |
|
605 |
s->rfd = fds[0];
|
606 |
s->wfd = fds[1];
|
607 |
|
608 |
fcntl(s->rfd, F_SETFL, O_NONBLOCK); |
609 |
fcntl(s->wfd, F_SETFL, O_NONBLOCK); |
610 |
|
611 |
qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
|
612 |
|
613 |
memset(&ai, 0, sizeof(ai)); |
614 |
ai.aio_threads = 64;
|
615 |
ai.aio_num = 64;
|
616 |
qemu_paio_init(&ai); |
617 |
|
618 |
posix_aio_state = s; |
619 |
|
620 |
return 0; |
621 |
} |
622 |
|
623 |
static void raw_aio_remove(RawAIOCB *acb) |
624 |
{ |
625 |
RawAIOCB **pacb; |
626 |
|
627 |
/* remove the callback from the queue */
|
628 |
pacb = &posix_aio_state->first_aio; |
629 |
for(;;) {
|
630 |
if (*pacb == NULL) { |
631 |
fprintf(stderr, "raw_aio_remove: aio request not found!\n");
|
632 |
break;
|
633 |
} else if (*pacb == acb) { |
634 |
*pacb = acb->next; |
635 |
qemu_aio_release(acb); |
636 |
break;
|
637 |
} |
638 |
pacb = &(*pacb)->next; |
639 |
} |
640 |
} |
641 |
|
642 |
static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
643 |
{ |
644 |
int ret;
|
645 |
RawAIOCB *acb = (RawAIOCB *)blockacb; |
646 |
|
647 |
ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
648 |
if (ret == QEMU_PAIO_NOTCANCELED) {
|
649 |
/* fail safe: if the aio could not be canceled, we wait for
|
650 |
it */
|
651 |
while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
|
652 |
} |
653 |
|
654 |
raw_aio_remove(acb); |
655 |
} |
656 |
|
657 |
static AIOPool raw_aio_pool = {
|
658 |
.aiocb_size = sizeof(RawAIOCB),
|
659 |
.cancel = raw_aio_cancel, |
660 |
}; |
661 |
|
662 |
static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
|
663 |
QEMUIOVector *qiov, int nb_sectors,
|
664 |
BlockDriverCompletionFunc *cb, void *opaque)
|
665 |
{ |
666 |
BDRVRawState *s = bs->opaque; |
667 |
RawAIOCB *acb; |
668 |
|
669 |
if (fd_open(bs) < 0) |
670 |
return NULL; |
671 |
|
672 |
acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque); |
673 |
if (!acb)
|
674 |
return NULL; |
675 |
acb->aiocb.aio_fildes = s->fd; |
676 |
acb->aiocb.ev_signo = SIGUSR2; |
677 |
acb->aiocb.aio_iov = qiov->iov; |
678 |
acb->aiocb.aio_niov = qiov->niov; |
679 |
acb->aiocb.aio_nbytes = nb_sectors * 512;
|
680 |
acb->aiocb.aio_offset = sector_num * 512;
|
681 |
acb->aiocb.aio_flags = 0;
|
682 |
|
683 |
/*
|
684 |
* If O_DIRECT is used the buffer needs to be aligned on a sector
|
685 |
* boundary. Tell the low level code to ensure that in case it's
|
686 |
* not done yet.
|
687 |
*/
|
688 |
if (s->aligned_buf)
|
689 |
acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED; |
690 |
|
691 |
acb->next = posix_aio_state->first_aio; |
692 |
posix_aio_state->first_aio = acb; |
693 |
return acb;
|
694 |
} |
695 |
|
696 |
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
|
697 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
698 |
BlockDriverCompletionFunc *cb, void *opaque)
|
699 |
{ |
700 |
RawAIOCB *acb; |
701 |
|
702 |
acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque); |
703 |
if (!acb)
|
704 |
return NULL; |
705 |
if (qemu_paio_read(&acb->aiocb) < 0) { |
706 |
raw_aio_remove(acb); |
707 |
return NULL; |
708 |
} |
709 |
return &acb->common;
|
710 |
} |
711 |
|
712 |
static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
|
713 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
714 |
BlockDriverCompletionFunc *cb, void *opaque)
|
715 |
{ |
716 |
RawAIOCB *acb; |
717 |
|
718 |
acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque); |
719 |
if (!acb)
|
720 |
return NULL; |
721 |
if (qemu_paio_write(&acb->aiocb) < 0) { |
722 |
raw_aio_remove(acb); |
723 |
return NULL; |
724 |
} |
725 |
return &acb->common;
|
726 |
} |
727 |
#else /* CONFIG_AIO */ |
728 |
static int posix_aio_init(void) |
729 |
{ |
730 |
return 0; |
731 |
} |
732 |
#endif /* CONFIG_AIO */ |
733 |
|
734 |
|
735 |
static void raw_close(BlockDriverState *bs) |
736 |
{ |
737 |
BDRVRawState *s = bs->opaque; |
738 |
if (s->fd >= 0) { |
739 |
close(s->fd); |
740 |
s->fd = -1;
|
741 |
if (s->aligned_buf != NULL) |
742 |
qemu_free(s->aligned_buf); |
743 |
} |
744 |
} |
745 |
|
746 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
747 |
{ |
748 |
BDRVRawState *s = bs->opaque; |
749 |
if (s->type != FTYPE_FILE)
|
750 |
return -ENOTSUP;
|
751 |
if (ftruncate(s->fd, offset) < 0) |
752 |
return -errno;
|
753 |
return 0; |
754 |
} |
755 |
|
756 |
#ifdef __OpenBSD__
|
757 |
static int64_t raw_getlength(BlockDriverState *bs)
|
758 |
{ |
759 |
BDRVRawState *s = bs->opaque; |
760 |
int fd = s->fd;
|
761 |
struct stat st;
|
762 |
|
763 |
if (fstat(fd, &st))
|
764 |
return -1; |
765 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
766 |
struct disklabel dl;
|
767 |
|
768 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
769 |
return -1; |
770 |
return (uint64_t)dl.d_secsize *
|
771 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
772 |
} else
|
773 |
return st.st_size;
|
774 |
} |
775 |
#else /* !__OpenBSD__ */ |
776 |
static int64_t raw_getlength(BlockDriverState *bs)
|
777 |
{ |
778 |
BDRVRawState *s = bs->opaque; |
779 |
int fd = s->fd;
|
780 |
int64_t size; |
781 |
#ifdef HOST_BSD
|
782 |
struct stat sb;
|
783 |
#ifdef __FreeBSD__
|
784 |
int reopened = 0; |
785 |
#endif
|
786 |
#endif
|
787 |
#ifdef __sun__
|
788 |
struct dk_minfo minfo;
|
789 |
int rv;
|
790 |
#endif
|
791 |
int ret;
|
792 |
|
793 |
ret = fd_open(bs); |
794 |
if (ret < 0) |
795 |
return ret;
|
796 |
|
797 |
#ifdef HOST_BSD
|
798 |
#ifdef __FreeBSD__
|
799 |
again:
|
800 |
#endif
|
801 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
802 |
#ifdef DIOCGMEDIASIZE
|
803 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
804 |
#elif defined(DIOCGPART)
|
805 |
{ |
806 |
struct partinfo pi;
|
807 |
if (ioctl(fd, DIOCGPART, &pi) == 0) |
808 |
size = pi.media_size; |
809 |
else
|
810 |
size = 0;
|
811 |
} |
812 |
if (size == 0) |
813 |
#endif
|
814 |
#ifdef CONFIG_COCOA
|
815 |
size = LONG_LONG_MAX; |
816 |
#else
|
817 |
size = lseek(fd, 0LL, SEEK_END);
|
818 |
#endif
|
819 |
#ifdef __FreeBSD__
|
820 |
switch(s->type) {
|
821 |
case FTYPE_CD:
|
822 |
/* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
|
823 |
if (size == 2048LL * (unsigned)-1) |
824 |
size = 0;
|
825 |
/* XXX no disc? maybe we need to reopen... */
|
826 |
if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
827 |
reopened = 1;
|
828 |
goto again;
|
829 |
} |
830 |
} |
831 |
#endif
|
832 |
} else
|
833 |
#endif
|
834 |
#ifdef __sun__
|
835 |
/*
|
836 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
837 |
*/
|
838 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
839 |
if ( rv != -1 ) { |
840 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
841 |
} else /* there are reports that lseek on some devices |
842 |
fails, but irc discussion said that contingency
|
843 |
on contingency was overkill */
|
844 |
#endif
|
845 |
{ |
846 |
size = lseek(fd, 0, SEEK_END);
|
847 |
} |
848 |
return size;
|
849 |
} |
850 |
#endif
|
851 |
|
852 |
static int raw_create(const char *filename, QEMUOptionParameter *options) |
853 |
{ |
854 |
int fd;
|
855 |
int result = 0; |
856 |
int64_t total_size = 0;
|
857 |
|
858 |
/* Read out options */
|
859 |
while (options && options->name) {
|
860 |
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
861 |
total_size = options->value.n / 512;
|
862 |
} |
863 |
options++; |
864 |
} |
865 |
|
866 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
867 |
0644);
|
868 |
if (fd < 0) { |
869 |
result = -errno; |
870 |
} else {
|
871 |
if (ftruncate(fd, total_size * 512) != 0) { |
872 |
result = -errno; |
873 |
} |
874 |
if (close(fd) != 0) { |
875 |
result = -errno; |
876 |
} |
877 |
} |
878 |
return result;
|
879 |
} |
880 |
|
881 |
static void raw_flush(BlockDriverState *bs) |
882 |
{ |
883 |
BDRVRawState *s = bs->opaque; |
884 |
fsync(s->fd); |
885 |
} |
886 |
|
887 |
|
888 |
static QEMUOptionParameter raw_create_options[] = {
|
889 |
{ |
890 |
.name = BLOCK_OPT_SIZE, |
891 |
.type = OPT_SIZE, |
892 |
.help = "Virtual disk size"
|
893 |
}, |
894 |
{ NULL }
|
895 |
}; |
896 |
|
897 |
static BlockDriver bdrv_raw = {
|
898 |
.format_name = "raw",
|
899 |
.instance_size = sizeof(BDRVRawState),
|
900 |
.bdrv_probe = NULL, /* no probe for protocols */ |
901 |
.bdrv_open = raw_open, |
902 |
.bdrv_read = raw_read, |
903 |
.bdrv_write = raw_write, |
904 |
.bdrv_close = raw_close, |
905 |
.bdrv_create = raw_create, |
906 |
.bdrv_flush = raw_flush, |
907 |
|
908 |
#ifdef CONFIG_AIO
|
909 |
.bdrv_aio_readv = raw_aio_readv, |
910 |
.bdrv_aio_writev = raw_aio_writev, |
911 |
#endif
|
912 |
|
913 |
.bdrv_truncate = raw_truncate, |
914 |
.bdrv_getlength = raw_getlength, |
915 |
|
916 |
.create_options = raw_create_options, |
917 |
}; |
918 |
|
919 |
/***********************************************/
|
920 |
/* host device */
|
921 |
|
922 |
#ifdef CONFIG_COCOA
|
923 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
924 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
925 |
|
926 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
927 |
{ |
928 |
kern_return_t kernResult; |
929 |
mach_port_t masterPort; |
930 |
CFMutableDictionaryRef classesToMatch; |
931 |
|
932 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
933 |
if ( KERN_SUCCESS != kernResult ) {
|
934 |
printf( "IOMasterPort returned %d\n", kernResult );
|
935 |
} |
936 |
|
937 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
938 |
if ( classesToMatch == NULL ) { |
939 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
940 |
} else {
|
941 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
942 |
} |
943 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
944 |
if ( KERN_SUCCESS != kernResult )
|
945 |
{ |
946 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
947 |
} |
948 |
|
949 |
return kernResult;
|
950 |
} |
951 |
|
952 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
953 |
{ |
954 |
io_object_t nextMedia; |
955 |
kern_return_t kernResult = KERN_FAILURE; |
956 |
*bsdPath = '\0';
|
957 |
nextMedia = IOIteratorNext( mediaIterator ); |
958 |
if ( nextMedia )
|
959 |
{ |
960 |
CFTypeRef bsdPathAsCFString; |
961 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
962 |
if ( bsdPathAsCFString ) {
|
963 |
size_t devPathLength; |
964 |
strcpy( bsdPath, _PATH_DEV ); |
965 |
strcat( bsdPath, "r" );
|
966 |
devPathLength = strlen( bsdPath ); |
967 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
968 |
kernResult = KERN_SUCCESS; |
969 |
} |
970 |
CFRelease( bsdPathAsCFString ); |
971 |
} |
972 |
IOObjectRelease( nextMedia ); |
973 |
} |
974 |
|
975 |
return kernResult;
|
976 |
} |
977 |
|
978 |
#endif
|
979 |
|
980 |
static int hdev_probe_device(const char *filename) |
981 |
{ |
982 |
struct stat st;
|
983 |
|
984 |
/* allow a dedicated CD-ROM driver to match with a higher priority */
|
985 |
if (strstart(filename, "/dev/cdrom", NULL)) |
986 |
return 50; |
987 |
|
988 |
if (stat(filename, &st) >= 0 && |
989 |
(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
990 |
return 100; |
991 |
} |
992 |
|
993 |
return 0; |
994 |
} |
995 |
|
996 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
997 |
{ |
998 |
BDRVRawState *s = bs->opaque; |
999 |
|
1000 |
#ifdef CONFIG_COCOA
|
1001 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
1002 |
kern_return_t kernResult; |
1003 |
io_iterator_t mediaIterator; |
1004 |
char bsdPath[ MAXPATHLEN ];
|
1005 |
int fd;
|
1006 |
|
1007 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
1008 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
1009 |
|
1010 |
if ( bsdPath[ 0 ] != '\0' ) { |
1011 |
strcat(bsdPath,"s0");
|
1012 |
/* some CDs don't have a partition 0 */
|
1013 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
1014 |
if (fd < 0) { |
1015 |
bsdPath[strlen(bsdPath)-1] = '1'; |
1016 |
} else {
|
1017 |
close(fd); |
1018 |
} |
1019 |
filename = bsdPath; |
1020 |
} |
1021 |
|
1022 |
if ( mediaIterator )
|
1023 |
IOObjectRelease( mediaIterator ); |
1024 |
} |
1025 |
#endif
|
1026 |
|
1027 |
s->type = FTYPE_FILE; |
1028 |
#if defined(__linux__) && defined(CONFIG_AIO)
|
1029 |
if (strstart(filename, "/dev/sg", NULL)) { |
1030 |
bs->sg = 1;
|
1031 |
} |
1032 |
#endif
|
1033 |
|
1034 |
return raw_open_common(bs, filename, flags, 0); |
1035 |
} |
1036 |
|
1037 |
#if defined(__linux__)
|
1038 |
/* Note: we do not have a reliable method to detect if the floppy is
|
1039 |
present. The current method is to try to open the floppy at every
|
1040 |
I/O and to keep it opened during a few hundreds of ms. */
|
1041 |
static int fd_open(BlockDriverState *bs) |
1042 |
{ |
1043 |
BDRVRawState *s = bs->opaque; |
1044 |
int last_media_present;
|
1045 |
|
1046 |
if (s->type != FTYPE_FD)
|
1047 |
return 0; |
1048 |
last_media_present = (s->fd >= 0);
|
1049 |
if (s->fd >= 0 && |
1050 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
1051 |
close(s->fd); |
1052 |
s->fd = -1;
|
1053 |
#ifdef DEBUG_FLOPPY
|
1054 |
printf("Floppy closed\n");
|
1055 |
#endif
|
1056 |
} |
1057 |
if (s->fd < 0) { |
1058 |
if (s->fd_got_error &&
|
1059 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
1060 |
#ifdef DEBUG_FLOPPY
|
1061 |
printf("No floppy (open delayed)\n");
|
1062 |
#endif
|
1063 |
return -EIO;
|
1064 |
} |
1065 |
s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK); |
1066 |
if (s->fd < 0) { |
1067 |
s->fd_error_time = qemu_get_clock(rt_clock); |
1068 |
s->fd_got_error = 1;
|
1069 |
if (last_media_present)
|
1070 |
s->fd_media_changed = 1;
|
1071 |
#ifdef DEBUG_FLOPPY
|
1072 |
printf("No floppy\n");
|
1073 |
#endif
|
1074 |
return -EIO;
|
1075 |
} |
1076 |
#ifdef DEBUG_FLOPPY
|
1077 |
printf("Floppy opened\n");
|
1078 |
#endif
|
1079 |
} |
1080 |
if (!last_media_present)
|
1081 |
s->fd_media_changed = 1;
|
1082 |
s->fd_open_time = qemu_get_clock(rt_clock); |
1083 |
s->fd_got_error = 0;
|
1084 |
return 0; |
1085 |
} |
1086 |
|
1087 |
static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1088 |
{ |
1089 |
BDRVRawState *s = bs->opaque; |
1090 |
|
1091 |
return ioctl(s->fd, req, buf);
|
1092 |
} |
1093 |
|
1094 |
#ifdef CONFIG_AIO
|
1095 |
static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
|
1096 |
unsigned long int req, void *buf, |
1097 |
BlockDriverCompletionFunc *cb, void *opaque)
|
1098 |
{ |
1099 |
BDRVRawState *s = bs->opaque; |
1100 |
RawAIOCB *acb; |
1101 |
|
1102 |
if (fd_open(bs) < 0) |
1103 |
return NULL; |
1104 |
|
1105 |
acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque); |
1106 |
if (!acb)
|
1107 |
return NULL; |
1108 |
acb->aiocb.aio_fildes = s->fd; |
1109 |
acb->aiocb.ev_signo = SIGUSR2; |
1110 |
acb->aiocb.aio_offset = 0;
|
1111 |
acb->aiocb.aio_flags = 0;
|
1112 |
|
1113 |
acb->next = posix_aio_state->first_aio; |
1114 |
posix_aio_state->first_aio = acb; |
1115 |
|
1116 |
acb->aiocb.aio_ioctl_buf = buf; |
1117 |
acb->aiocb.aio_ioctl_cmd = req; |
1118 |
if (qemu_paio_ioctl(&acb->aiocb) < 0) { |
1119 |
raw_aio_remove(acb); |
1120 |
return NULL; |
1121 |
} |
1122 |
|
1123 |
return &acb->common;
|
1124 |
} |
1125 |
#endif
|
1126 |
|
1127 |
#elif defined(__FreeBSD__)
|
1128 |
static int fd_open(BlockDriverState *bs) |
1129 |
{ |
1130 |
BDRVRawState *s = bs->opaque; |
1131 |
|
1132 |
/* this is just to ensure s->fd is sane (its called by io ops) */
|
1133 |
if (s->fd >= 0) |
1134 |
return 0; |
1135 |
return -EIO;
|
1136 |
} |
1137 |
#else /* !linux && !FreeBSD */ |
1138 |
|
1139 |
static int fd_open(BlockDriverState *bs) |
1140 |
{ |
1141 |
return 0; |
1142 |
} |
1143 |
|
1144 |
#endif /* !linux && !FreeBSD */ |
1145 |
|
1146 |
static int hdev_create(const char *filename, QEMUOptionParameter *options) |
1147 |
{ |
1148 |
int fd;
|
1149 |
int ret = 0; |
1150 |
struct stat stat_buf;
|
1151 |
int64_t total_size = 0;
|
1152 |
|
1153 |
/* Read out options */
|
1154 |
while (options && options->name) {
|
1155 |
if (!strcmp(options->name, "size")) { |
1156 |
total_size = options->value.n / 512;
|
1157 |
} |
1158 |
options++; |
1159 |
} |
1160 |
|
1161 |
fd = open(filename, O_WRONLY | O_BINARY); |
1162 |
if (fd < 0) |
1163 |
return -EIO;
|
1164 |
|
1165 |
if (fstat(fd, &stat_buf) < 0) |
1166 |
ret = -EIO; |
1167 |
else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
1168 |
ret = -EIO; |
1169 |
else if (lseek(fd, 0, SEEK_END) < total_size * 512) |
1170 |
ret = -ENOSPC; |
1171 |
|
1172 |
close(fd); |
1173 |
return ret;
|
1174 |
} |
1175 |
|
1176 |
static BlockDriver bdrv_host_device = {
|
1177 |
.format_name = "host_device",
|
1178 |
.instance_size = sizeof(BDRVRawState),
|
1179 |
.bdrv_probe_device = hdev_probe_device, |
1180 |
.bdrv_open = hdev_open, |
1181 |
.bdrv_close = raw_close, |
1182 |
.bdrv_create = hdev_create, |
1183 |
.bdrv_flush = raw_flush, |
1184 |
|
1185 |
#ifdef CONFIG_AIO
|
1186 |
.bdrv_aio_readv = raw_aio_readv, |
1187 |
.bdrv_aio_writev = raw_aio_writev, |
1188 |
#endif
|
1189 |
|
1190 |
.bdrv_read = raw_read, |
1191 |
.bdrv_write = raw_write, |
1192 |
.bdrv_getlength = raw_getlength, |
1193 |
|
1194 |
/* generic scsi device */
|
1195 |
#ifdef __linux__
|
1196 |
.bdrv_ioctl = hdev_ioctl, |
1197 |
#ifdef CONFIG_AIO
|
1198 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1199 |
#endif
|
1200 |
#endif
|
1201 |
}; |
1202 |
|
1203 |
#ifdef __linux__
|
1204 |
static int floppy_open(BlockDriverState *bs, const char *filename, int flags) |
1205 |
{ |
1206 |
BDRVRawState *s = bs->opaque; |
1207 |
int ret;
|
1208 |
|
1209 |
posix_aio_init(); |
1210 |
|
1211 |
s->type = FTYPE_FD; |
1212 |
|
1213 |
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
|
1214 |
ret = raw_open_common(bs, filename, flags, O_NONBLOCK); |
1215 |
if (ret)
|
1216 |
return ret;
|
1217 |
|
1218 |
/* close fd so that we can reopen it as needed */
|
1219 |
close(s->fd); |
1220 |
s->fd = -1;
|
1221 |
s->fd_media_changed = 1;
|
1222 |
|
1223 |
return 0; |
1224 |
} |
1225 |
|
1226 |
static int floppy_probe_device(const char *filename) |
1227 |
{ |
1228 |
if (strstart(filename, "/dev/fd", NULL)) |
1229 |
return 100; |
1230 |
return 0; |
1231 |
} |
1232 |
|
1233 |
|
1234 |
static int floppy_is_inserted(BlockDriverState *bs) |
1235 |
{ |
1236 |
return fd_open(bs) >= 0; |
1237 |
} |
1238 |
|
1239 |
static int floppy_media_changed(BlockDriverState *bs) |
1240 |
{ |
1241 |
BDRVRawState *s = bs->opaque; |
1242 |
int ret;
|
1243 |
|
1244 |
/*
|
1245 |
* XXX: we do not have a true media changed indication.
|
1246 |
* It does not work if the floppy is changed without trying to read it.
|
1247 |
*/
|
1248 |
fd_open(bs); |
1249 |
ret = s->fd_media_changed; |
1250 |
s->fd_media_changed = 0;
|
1251 |
#ifdef DEBUG_FLOPPY
|
1252 |
printf("Floppy changed=%d\n", ret);
|
1253 |
#endif
|
1254 |
return ret;
|
1255 |
} |
1256 |
|
1257 |
static int floppy_eject(BlockDriverState *bs, int eject_flag) |
1258 |
{ |
1259 |
BDRVRawState *s = bs->opaque; |
1260 |
int fd;
|
1261 |
|
1262 |
if (s->fd >= 0) { |
1263 |
close(s->fd); |
1264 |
s->fd = -1;
|
1265 |
} |
1266 |
fd = open(bs->filename, s->open_flags | O_NONBLOCK); |
1267 |
if (fd >= 0) { |
1268 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1269 |
perror("FDEJECT");
|
1270 |
close(fd); |
1271 |
} |
1272 |
|
1273 |
return 0; |
1274 |
} |
1275 |
|
1276 |
static BlockDriver bdrv_host_floppy = {
|
1277 |
.format_name = "host_floppy",
|
1278 |
.instance_size = sizeof(BDRVRawState),
|
1279 |
.bdrv_probe_device = floppy_probe_device, |
1280 |
.bdrv_open = floppy_open, |
1281 |
.bdrv_close = raw_close, |
1282 |
.bdrv_create = hdev_create, |
1283 |
.bdrv_flush = raw_flush, |
1284 |
|
1285 |
#ifdef CONFIG_AIO
|
1286 |
.bdrv_aio_readv = raw_aio_readv, |
1287 |
.bdrv_aio_writev = raw_aio_writev, |
1288 |
#endif
|
1289 |
|
1290 |
.bdrv_read = raw_read, |
1291 |
.bdrv_write = raw_write, |
1292 |
.bdrv_getlength = raw_getlength, |
1293 |
|
1294 |
/* removable device support */
|
1295 |
.bdrv_is_inserted = floppy_is_inserted, |
1296 |
.bdrv_media_changed = floppy_media_changed, |
1297 |
.bdrv_eject = floppy_eject, |
1298 |
}; |
1299 |
|
1300 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1301 |
{ |
1302 |
BDRVRawState *s = bs->opaque; |
1303 |
|
1304 |
s->type = FTYPE_CD; |
1305 |
|
1306 |
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
|
1307 |
return raw_open_common(bs, filename, flags, O_NONBLOCK);
|
1308 |
} |
1309 |
|
1310 |
static int cdrom_probe_device(const char *filename) |
1311 |
{ |
1312 |
if (strstart(filename, "/dev/cd", NULL)) |
1313 |
return 100; |
1314 |
return 0; |
1315 |
} |
1316 |
|
1317 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1318 |
{ |
1319 |
BDRVRawState *s = bs->opaque; |
1320 |
int ret;
|
1321 |
|
1322 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1323 |
if (ret == CDS_DISC_OK)
|
1324 |
return 1; |
1325 |
return 0; |
1326 |
} |
1327 |
|
1328 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1329 |
{ |
1330 |
BDRVRawState *s = bs->opaque; |
1331 |
|
1332 |
if (eject_flag) {
|
1333 |
if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
1334 |
perror("CDROMEJECT");
|
1335 |
} else {
|
1336 |
if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
1337 |
perror("CDROMEJECT");
|
1338 |
} |
1339 |
|
1340 |
return 0; |
1341 |
} |
1342 |
|
1343 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1344 |
{ |
1345 |
BDRVRawState *s = bs->opaque; |
1346 |
|
1347 |
if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1348 |
/*
|
1349 |
* Note: an error can happen if the distribution automatically
|
1350 |
* mounts the CD-ROM
|
1351 |
*/
|
1352 |
/* perror("CDROM_LOCKDOOR"); */
|
1353 |
} |
1354 |
|
1355 |
return 0; |
1356 |
} |
1357 |
|
1358 |
static BlockDriver bdrv_host_cdrom = {
|
1359 |
.format_name = "host_cdrom",
|
1360 |
.instance_size = sizeof(BDRVRawState),
|
1361 |
.bdrv_probe_device = cdrom_probe_device, |
1362 |
.bdrv_open = cdrom_open, |
1363 |
.bdrv_close = raw_close, |
1364 |
.bdrv_create = hdev_create, |
1365 |
.bdrv_flush = raw_flush, |
1366 |
|
1367 |
#ifdef CONFIG_AIO
|
1368 |
.bdrv_aio_readv = raw_aio_readv, |
1369 |
.bdrv_aio_writev = raw_aio_writev, |
1370 |
#endif
|
1371 |
|
1372 |
.bdrv_read = raw_read, |
1373 |
.bdrv_write = raw_write, |
1374 |
.bdrv_getlength = raw_getlength, |
1375 |
|
1376 |
/* removable device support */
|
1377 |
.bdrv_is_inserted = cdrom_is_inserted, |
1378 |
.bdrv_eject = cdrom_eject, |
1379 |
.bdrv_set_locked = cdrom_set_locked, |
1380 |
|
1381 |
/* generic scsi device */
|
1382 |
.bdrv_ioctl = hdev_ioctl, |
1383 |
#ifdef CONFIG_AIO
|
1384 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1385 |
#endif
|
1386 |
}; |
1387 |
#endif /* __linux__ */ |
1388 |
|
1389 |
#ifdef __FreeBSD__
|
1390 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1391 |
{ |
1392 |
BDRVRawState *s = bs->opaque; |
1393 |
int ret;
|
1394 |
|
1395 |
s->type = FTYPE_CD; |
1396 |
|
1397 |
ret = raw_open_common(bs, filename, flags, 0);
|
1398 |
if (ret)
|
1399 |
return ret;
|
1400 |
|
1401 |
/* make sure the door isnt locked at this time */
|
1402 |
ioctl(s->fd, CDIOCALLOW); |
1403 |
return 0; |
1404 |
} |
1405 |
|
1406 |
static int cdrom_probe_device(const char *filename) |
1407 |
{ |
1408 |
if (strstart(filename, "/dev/cd", NULL) || |
1409 |
strstart(filename, "/dev/acd", NULL)) |
1410 |
return 100; |
1411 |
return 0; |
1412 |
} |
1413 |
|
1414 |
static int cdrom_reopen(BlockDriverState *bs) |
1415 |
{ |
1416 |
BDRVRawState *s = bs->opaque; |
1417 |
int fd;
|
1418 |
|
1419 |
/*
|
1420 |
* Force reread of possibly changed/newly loaded disc,
|
1421 |
* FreeBSD seems to not notice sometimes...
|
1422 |
*/
|
1423 |
if (s->fd >= 0) |
1424 |
close(s->fd); |
1425 |
fd = open(bs->filename, s->open_flags, 0644);
|
1426 |
if (fd < 0) { |
1427 |
s->fd = -1;
|
1428 |
return -EIO;
|
1429 |
} |
1430 |
s->fd = fd; |
1431 |
|
1432 |
/* make sure the door isnt locked at this time */
|
1433 |
ioctl(s->fd, CDIOCALLOW); |
1434 |
return 0; |
1435 |
} |
1436 |
|
1437 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1438 |
{ |
1439 |
return raw_getlength(bs) > 0; |
1440 |
} |
1441 |
|
1442 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1443 |
{ |
1444 |
BDRVRawState *s = bs->opaque; |
1445 |
|
1446 |
if (s->fd < 0) |
1447 |
return -ENOTSUP;
|
1448 |
|
1449 |
(void) ioctl(s->fd, CDIOCALLOW);
|
1450 |
|
1451 |
if (eject_flag) {
|
1452 |
if (ioctl(s->fd, CDIOCEJECT) < 0) |
1453 |
perror("CDIOCEJECT");
|
1454 |
} else {
|
1455 |
if (ioctl(s->fd, CDIOCCLOSE) < 0) |
1456 |
perror("CDIOCCLOSE");
|
1457 |
} |
1458 |
|
1459 |
if (cdrom_reopen(bs) < 0) |
1460 |
return -ENOTSUP;
|
1461 |
return 0; |
1462 |
} |
1463 |
|
1464 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1465 |
{ |
1466 |
BDRVRawState *s = bs->opaque; |
1467 |
|
1468 |
if (s->fd < 0) |
1469 |
return -ENOTSUP;
|
1470 |
if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
1471 |
/*
|
1472 |
* Note: an error can happen if the distribution automatically
|
1473 |
* mounts the CD-ROM
|
1474 |
*/
|
1475 |
/* perror("CDROM_LOCKDOOR"); */
|
1476 |
} |
1477 |
|
1478 |
return 0; |
1479 |
} |
1480 |
|
1481 |
static BlockDriver bdrv_host_cdrom = {
|
1482 |
.format_name = "host_cdrom",
|
1483 |
.instance_size = sizeof(BDRVRawState),
|
1484 |
.bdrv_probe_device = cdrom_probe_device, |
1485 |
.bdrv_open = cdrom_open, |
1486 |
.bdrv_close = raw_close, |
1487 |
.bdrv_create = hdev_create, |
1488 |
.bdrv_flush = raw_flush, |
1489 |
|
1490 |
#ifdef CONFIG_AIO
|
1491 |
.bdrv_aio_readv = raw_aio_readv, |
1492 |
.bdrv_aio_writev = raw_aio_writev, |
1493 |
#endif
|
1494 |
|
1495 |
.bdrv_read = raw_read, |
1496 |
.bdrv_write = raw_write, |
1497 |
.bdrv_getlength = raw_getlength, |
1498 |
|
1499 |
/* removable device support */
|
1500 |
.bdrv_is_inserted = cdrom_is_inserted, |
1501 |
.bdrv_eject = cdrom_eject, |
1502 |
.bdrv_set_locked = cdrom_set_locked, |
1503 |
}; |
1504 |
#endif /* __FreeBSD__ */ |
1505 |
|
1506 |
static void bdrv_raw_init(void) |
1507 |
{ |
1508 |
/*
|
1509 |
* Register all the drivers. Note that order is important, the driver
|
1510 |
* registered last will get probed first.
|
1511 |
*/
|
1512 |
bdrv_register(&bdrv_raw); |
1513 |
bdrv_register(&bdrv_host_device); |
1514 |
#ifdef __linux__
|
1515 |
bdrv_register(&bdrv_host_floppy); |
1516 |
bdrv_register(&bdrv_host_cdrom); |
1517 |
#endif
|
1518 |
#ifdef __FreeBSD__
|
1519 |
bdrv_register(&bdrv_host_cdrom); |
1520 |
#endif
|
1521 |
} |
1522 |
|
1523 |
block_init(bdrv_raw_init); |