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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 "qemu-log.h" |
28 |
#include "block_int.h" |
29 |
#include "module.h" |
30 |
#include "block/raw-posix-aio.h" |
31 |
|
32 |
#ifdef CONFIG_COCOA
|
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#include <paths.h> |
34 |
#include <sys/param.h> |
35 |
#include <IOKit/IOKitLib.h> |
36 |
#include <IOKit/IOBSD.h> |
37 |
#include <IOKit/storage/IOMediaBSDClient.h> |
38 |
#include <IOKit/storage/IOMedia.h> |
39 |
#include <IOKit/storage/IOCDMedia.h> |
40 |
//#include <IOKit/storage/IOCDTypes.h>
|
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#include <CoreFoundation/CoreFoundation.h> |
42 |
#endif
|
43 |
|
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#ifdef __sun__
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#define _POSIX_PTHREAD_SEMANTICS 1 |
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#include <signal.h> |
47 |
#include <sys/dkio.h> |
48 |
#endif
|
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#ifdef __linux__
|
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#include <sys/ioctl.h> |
51 |
#include <sys/param.h> |
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#include <linux/cdrom.h> |
53 |
#include <linux/fd.h> |
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#endif
|
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#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
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#include <signal.h> |
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#include <sys/disk.h> |
58 |
#include <sys/cdio.h> |
59 |
#endif
|
60 |
|
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#ifdef __OpenBSD__
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#include <sys/ioctl.h> |
63 |
#include <sys/disklabel.h> |
64 |
#include <sys/dkio.h> |
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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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|
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#ifdef CONFIG_XFS
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#include <xfs/xfs.h> |
74 |
#endif
|
75 |
|
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//#define DEBUG_FLOPPY
|
77 |
|
78 |
//#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()) \ |
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{ qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) |
82 |
#else
|
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#define DEBUG_BLOCK_PRINT(formatCstr, ...)
|
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#endif
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85 |
|
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/* 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
|
94 |
|
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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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|
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#define FTYPE_FILE 0 |
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#define FTYPE_CD 1 |
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#define FTYPE_FD 2 |
103 |
|
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/* if the FD is not accessed during that time (in ns), 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 (1000000000) |
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|
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#define MAX_BLOCKSIZE 4096 |
109 |
|
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typedef struct BDRVRawState { |
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int fd;
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int type;
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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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#ifdef CONFIG_LINUX_AIO
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int use_aio;
|
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void *aio_ctx;
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#endif
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uint8_t *aligned_buf; |
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unsigned aligned_buf_size;
|
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#ifdef CONFIG_XFS
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bool is_xfs : 1; |
129 |
#endif
|
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} BDRVRawState; |
131 |
|
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static int fd_open(BlockDriverState *bs); |
133 |
static int64_t raw_getlength(BlockDriverState *bs);
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134 |
|
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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static int cdrom_reopen(BlockDriverState *bs); |
137 |
#endif
|
138 |
|
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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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s->open_flags = open_flags | O_BINARY; |
146 |
s->open_flags &= ~O_ACCMODE; |
147 |
if (bdrv_flags & BDRV_O_RDWR) {
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s->open_flags |= O_RDWR; |
149 |
} else {
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s->open_flags |= O_RDONLY; |
151 |
} |
152 |
|
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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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if (!(bdrv_flags & BDRV_O_CACHE_WB))
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s->open_flags |= O_DSYNC; |
159 |
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s->fd = -1;
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fd = qemu_open(filename, s->open_flags, 0644);
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if (fd < 0) { |
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ret = -errno; |
164 |
if (ret == -EROFS)
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ret = -EACCES; |
166 |
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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|
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if ((bdrv_flags & BDRV_O_NOCACHE)) {
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/*
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* Allocate a buffer for read/modify/write cycles. Chose the size
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* pessimistically as we don't know the block size yet.
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*/
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s->aligned_buf_size = 32 * MAX_BLOCKSIZE;
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s->aligned_buf = qemu_memalign(MAX_BLOCKSIZE, s->aligned_buf_size); |
178 |
if (s->aligned_buf == NULL) { |
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goto out_close;
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} |
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} |
182 |
|
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#ifdef CONFIG_LINUX_AIO
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if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
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(BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { |
186 |
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/* We're falling back to POSIX AIO in some cases */
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paio_init(); |
189 |
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s->aio_ctx = laio_init(); |
191 |
if (!s->aio_ctx) {
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goto out_free_buf;
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} |
194 |
s->use_aio = 1;
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} else
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#endif
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{ |
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if (paio_init() < 0) { |
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goto out_free_buf;
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} |
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#ifdef CONFIG_LINUX_AIO
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s->use_aio = 0;
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#endif
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} |
205 |
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#ifdef CONFIG_XFS
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if (platform_test_xfs_fd(s->fd)) {
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s->is_xfs = 1;
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} |
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#endif
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return 0; |
213 |
|
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out_free_buf:
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qemu_vfree(s->aligned_buf); |
216 |
out_close:
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close(fd); |
218 |
return -errno;
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} |
220 |
|
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static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
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{ |
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BDRVRawState *s = bs->opaque; |
224 |
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s->type = FTYPE_FILE; |
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return raw_open_common(bs, filename, flags, 0); |
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} |
228 |
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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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uint32_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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* 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, |
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uint8_t *buf, int count)
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{ |
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BDRVRawState *s = bs->opaque; |
257 |
int ret;
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ret = fd_open(bs); |
260 |
if (ret < 0) |
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return ret;
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|
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ret = pread(s->fd, buf, count, offset); |
264 |
if (ret == count)
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return ret;
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|
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/* Allow reads beyond the end (needed for pwrite) */
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if ((ret == 0) && bs->growable) { |
269 |
int64_t size = raw_getlength(bs); |
270 |
if (offset >= size) {
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memset(buf, 0, count);
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return count;
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} |
274 |
} |
275 |
|
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DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
277 |
"] read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
279 |
bs->total_sectors, ret, errno, strerror(errno)); |
280 |
|
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/* Try harder for CDrom. */
|
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if (s->type != FTYPE_FILE) {
|
283 |
ret = pread(s->fd, buf, count, offset); |
284 |
if (ret == count)
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285 |
return ret;
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286 |
ret = pread(s->fd, buf, count, offset); |
287 |
if (ret == count)
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return ret;
|
289 |
|
290 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
291 |
"] retry read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
293 |
bs->total_sectors, ret, errno, strerror(errno)); |
294 |
} |
295 |
|
296 |
return (ret < 0) ? -errno : ret; |
297 |
} |
298 |
|
299 |
/*
|
300 |
* offset and count are in bytes, but must be multiples of the sector size
|
301 |
* for files opened with O_DIRECT. buf must be aligned to sector size bytes
|
302 |
* then.
|
303 |
*
|
304 |
* This function may be called without alignment if the caller ensures
|
305 |
* that O_DIRECT is not in effect.
|
306 |
*/
|
307 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
308 |
const uint8_t *buf, int count) |
309 |
{ |
310 |
BDRVRawState *s = bs->opaque; |
311 |
int ret;
|
312 |
|
313 |
ret = fd_open(bs); |
314 |
if (ret < 0) |
315 |
return -errno;
|
316 |
|
317 |
ret = pwrite(s->fd, buf, count, offset); |
318 |
if (ret == count)
|
319 |
return ret;
|
320 |
|
321 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
322 |
"] write failed %d : %d = %s\n",
|
323 |
s->fd, bs->filename, offset, buf, count, |
324 |
bs->total_sectors, ret, errno, strerror(errno)); |
325 |
|
326 |
return (ret < 0) ? -errno : ret; |
327 |
} |
328 |
|
329 |
|
330 |
/*
|
331 |
* offset and count are in bytes and possibly not aligned. For files opened
|
332 |
* with O_DIRECT, necessary alignments are ensured before calling
|
333 |
* raw_pread_aligned to do the actual read.
|
334 |
*/
|
335 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
336 |
uint8_t *buf, int count)
|
337 |
{ |
338 |
BDRVRawState *s = bs->opaque; |
339 |
unsigned sector_mask = bs->buffer_alignment - 1; |
340 |
int size, ret, shift, sum;
|
341 |
|
342 |
sum = 0;
|
343 |
|
344 |
if (s->aligned_buf != NULL) { |
345 |
|
346 |
if (offset & sector_mask) {
|
347 |
/* align offset on a sector size bytes boundary */
|
348 |
|
349 |
shift = offset & sector_mask; |
350 |
size = (shift + count + sector_mask) & ~sector_mask; |
351 |
if (size > s->aligned_buf_size)
|
352 |
size = s->aligned_buf_size; |
353 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
354 |
if (ret < 0) |
355 |
return ret;
|
356 |
|
357 |
size = bs->buffer_alignment - shift; |
358 |
if (size > count)
|
359 |
size = count; |
360 |
memcpy(buf, s->aligned_buf + shift, size); |
361 |
|
362 |
buf += size; |
363 |
offset += size; |
364 |
count -= size; |
365 |
sum += size; |
366 |
|
367 |
if (count == 0) |
368 |
return sum;
|
369 |
} |
370 |
if (count & sector_mask || (uintptr_t) buf & sector_mask) {
|
371 |
|
372 |
/* read on aligned buffer */
|
373 |
|
374 |
while (count) {
|
375 |
|
376 |
size = (count + sector_mask) & ~sector_mask; |
377 |
if (size > s->aligned_buf_size)
|
378 |
size = s->aligned_buf_size; |
379 |
|
380 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
381 |
if (ret < 0) { |
382 |
return ret;
|
383 |
} else if (ret == 0) { |
384 |
fprintf(stderr, "raw_pread: read beyond end of file\n");
|
385 |
abort(); |
386 |
} |
387 |
|
388 |
size = ret; |
389 |
if (size > count)
|
390 |
size = count; |
391 |
|
392 |
memcpy(buf, s->aligned_buf, size); |
393 |
|
394 |
buf += size; |
395 |
offset += size; |
396 |
count -= size; |
397 |
sum += size; |
398 |
} |
399 |
|
400 |
return sum;
|
401 |
} |
402 |
} |
403 |
|
404 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
405 |
} |
406 |
|
407 |
static int raw_read(BlockDriverState *bs, int64_t sector_num, |
408 |
uint8_t *buf, int nb_sectors)
|
409 |
{ |
410 |
int ret;
|
411 |
|
412 |
ret = raw_pread(bs, sector_num * BDRV_SECTOR_SIZE, buf, |
413 |
nb_sectors * BDRV_SECTOR_SIZE); |
414 |
if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
|
415 |
ret = 0;
|
416 |
return ret;
|
417 |
} |
418 |
|
419 |
/*
|
420 |
* offset and count are in bytes and possibly not aligned. For files opened
|
421 |
* with O_DIRECT, necessary alignments are ensured before calling
|
422 |
* raw_pwrite_aligned to do the actual write.
|
423 |
*/
|
424 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
425 |
const uint8_t *buf, int count) |
426 |
{ |
427 |
BDRVRawState *s = bs->opaque; |
428 |
unsigned sector_mask = bs->buffer_alignment - 1; |
429 |
int size, ret, shift, sum;
|
430 |
|
431 |
sum = 0;
|
432 |
|
433 |
if (s->aligned_buf != NULL) { |
434 |
|
435 |
if (offset & sector_mask) {
|
436 |
/* align offset on a sector size bytes boundary */
|
437 |
shift = offset & sector_mask; |
438 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, |
439 |
bs->buffer_alignment); |
440 |
if (ret < 0) |
441 |
return ret;
|
442 |
|
443 |
size = bs->buffer_alignment - shift; |
444 |
if (size > count)
|
445 |
size = count; |
446 |
memcpy(s->aligned_buf + shift, buf, size); |
447 |
|
448 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, |
449 |
bs->buffer_alignment); |
450 |
if (ret < 0) |
451 |
return ret;
|
452 |
|
453 |
buf += size; |
454 |
offset += size; |
455 |
count -= size; |
456 |
sum += size; |
457 |
|
458 |
if (count == 0) |
459 |
return sum;
|
460 |
} |
461 |
if (count & sector_mask || (uintptr_t) buf & sector_mask) {
|
462 |
|
463 |
while ((size = (count & ~sector_mask)) != 0) { |
464 |
|
465 |
if (size > s->aligned_buf_size)
|
466 |
size = s->aligned_buf_size; |
467 |
|
468 |
memcpy(s->aligned_buf, buf, size); |
469 |
|
470 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
471 |
if (ret < 0) |
472 |
return ret;
|
473 |
|
474 |
buf += ret; |
475 |
offset += ret; |
476 |
count -= ret; |
477 |
sum += ret; |
478 |
} |
479 |
/* here, count < sector_size because (count & ~sector_mask) == 0 */
|
480 |
if (count) {
|
481 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, |
482 |
bs->buffer_alignment); |
483 |
if (ret < 0) |
484 |
return ret;
|
485 |
memcpy(s->aligned_buf, buf, count); |
486 |
|
487 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, |
488 |
bs->buffer_alignment); |
489 |
if (ret < 0) |
490 |
return ret;
|
491 |
if (count < ret)
|
492 |
ret = count; |
493 |
|
494 |
sum += ret; |
495 |
} |
496 |
return sum;
|
497 |
} |
498 |
} |
499 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
500 |
} |
501 |
|
502 |
static int raw_write(BlockDriverState *bs, int64_t sector_num, |
503 |
const uint8_t *buf, int nb_sectors) |
504 |
{ |
505 |
int ret;
|
506 |
ret = raw_pwrite(bs, sector_num * BDRV_SECTOR_SIZE, buf, |
507 |
nb_sectors * BDRV_SECTOR_SIZE); |
508 |
if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
|
509 |
ret = 0;
|
510 |
return ret;
|
511 |
} |
512 |
|
513 |
/*
|
514 |
* Check if all memory in this vector is sector aligned.
|
515 |
*/
|
516 |
static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov) |
517 |
{ |
518 |
int i;
|
519 |
|
520 |
for (i = 0; i < qiov->niov; i++) { |
521 |
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
|
522 |
return 0; |
523 |
} |
524 |
} |
525 |
|
526 |
return 1; |
527 |
} |
528 |
|
529 |
static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
|
530 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
531 |
BlockDriverCompletionFunc *cb, void *opaque, int type) |
532 |
{ |
533 |
BDRVRawState *s = bs->opaque; |
534 |
|
535 |
if (fd_open(bs) < 0) |
536 |
return NULL; |
537 |
|
538 |
/*
|
539 |
* If O_DIRECT is used the buffer needs to be aligned on a sector
|
540 |
* boundary. Check if this is the case or telll the low-level
|
541 |
* driver that it needs to copy the buffer.
|
542 |
*/
|
543 |
if (s->aligned_buf) {
|
544 |
if (!qiov_is_aligned(bs, qiov)) {
|
545 |
type |= QEMU_AIO_MISALIGNED; |
546 |
#ifdef CONFIG_LINUX_AIO
|
547 |
} else if (s->use_aio) { |
548 |
return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
|
549 |
nb_sectors, cb, opaque, type); |
550 |
#endif
|
551 |
} |
552 |
} |
553 |
|
554 |
return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
|
555 |
cb, opaque, type); |
556 |
} |
557 |
|
558 |
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
|
559 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
560 |
BlockDriverCompletionFunc *cb, void *opaque)
|
561 |
{ |
562 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
563 |
cb, opaque, QEMU_AIO_READ); |
564 |
} |
565 |
|
566 |
static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
|
567 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
568 |
BlockDriverCompletionFunc *cb, void *opaque)
|
569 |
{ |
570 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
571 |
cb, opaque, QEMU_AIO_WRITE); |
572 |
} |
573 |
|
574 |
static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
|
575 |
BlockDriverCompletionFunc *cb, void *opaque)
|
576 |
{ |
577 |
BDRVRawState *s = bs->opaque; |
578 |
|
579 |
if (fd_open(bs) < 0) |
580 |
return NULL; |
581 |
|
582 |
return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
583 |
} |
584 |
|
585 |
static void raw_close(BlockDriverState *bs) |
586 |
{ |
587 |
BDRVRawState *s = bs->opaque; |
588 |
if (s->fd >= 0) { |
589 |
close(s->fd); |
590 |
s->fd = -1;
|
591 |
if (s->aligned_buf != NULL) |
592 |
qemu_vfree(s->aligned_buf); |
593 |
} |
594 |
} |
595 |
|
596 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
597 |
{ |
598 |
BDRVRawState *s = bs->opaque; |
599 |
if (s->type != FTYPE_FILE)
|
600 |
return -ENOTSUP;
|
601 |
if (ftruncate(s->fd, offset) < 0) |
602 |
return -errno;
|
603 |
return 0; |
604 |
} |
605 |
|
606 |
#ifdef __OpenBSD__
|
607 |
static int64_t raw_getlength(BlockDriverState *bs)
|
608 |
{ |
609 |
BDRVRawState *s = bs->opaque; |
610 |
int fd = s->fd;
|
611 |
struct stat st;
|
612 |
|
613 |
if (fstat(fd, &st))
|
614 |
return -1; |
615 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
616 |
struct disklabel dl;
|
617 |
|
618 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
619 |
return -1; |
620 |
return (uint64_t)dl.d_secsize *
|
621 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
622 |
} else
|
623 |
return st.st_size;
|
624 |
} |
625 |
#elif defined(__sun__)
|
626 |
static int64_t raw_getlength(BlockDriverState *bs)
|
627 |
{ |
628 |
BDRVRawState *s = bs->opaque; |
629 |
struct dk_minfo minfo;
|
630 |
int ret;
|
631 |
|
632 |
ret = fd_open(bs); |
633 |
if (ret < 0) { |
634 |
return ret;
|
635 |
} |
636 |
|
637 |
/*
|
638 |
* Use the DKIOCGMEDIAINFO ioctl to read the size.
|
639 |
*/
|
640 |
ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); |
641 |
if (ret != -1) { |
642 |
return minfo.dki_lbsize * minfo.dki_capacity;
|
643 |
} |
644 |
|
645 |
/*
|
646 |
* There are reports that lseek on some devices fails, but
|
647 |
* irc discussion said that contingency on contingency was overkill.
|
648 |
*/
|
649 |
return lseek(s->fd, 0, SEEK_END); |
650 |
} |
651 |
#elif defined(CONFIG_BSD)
|
652 |
static int64_t raw_getlength(BlockDriverState *bs)
|
653 |
{ |
654 |
BDRVRawState *s = bs->opaque; |
655 |
int fd = s->fd;
|
656 |
int64_t size; |
657 |
struct stat sb;
|
658 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
659 |
int reopened = 0; |
660 |
#endif
|
661 |
int ret;
|
662 |
|
663 |
ret = fd_open(bs); |
664 |
if (ret < 0) |
665 |
return ret;
|
666 |
|
667 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
668 |
again:
|
669 |
#endif
|
670 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
671 |
#ifdef DIOCGMEDIASIZE
|
672 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
673 |
#elif defined(DIOCGPART)
|
674 |
{ |
675 |
struct partinfo pi;
|
676 |
if (ioctl(fd, DIOCGPART, &pi) == 0) |
677 |
size = pi.media_size; |
678 |
else
|
679 |
size = 0;
|
680 |
} |
681 |
if (size == 0) |
682 |
#endif
|
683 |
#ifdef CONFIG_COCOA
|
684 |
size = LONG_LONG_MAX; |
685 |
#else
|
686 |
size = lseek(fd, 0LL, SEEK_END);
|
687 |
#endif
|
688 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
689 |
switch(s->type) {
|
690 |
case FTYPE_CD:
|
691 |
/* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
|
692 |
if (size == 2048LL * (unsigned)-1) |
693 |
size = 0;
|
694 |
/* XXX no disc? maybe we need to reopen... */
|
695 |
if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
696 |
reopened = 1;
|
697 |
goto again;
|
698 |
} |
699 |
} |
700 |
#endif
|
701 |
} else {
|
702 |
size = lseek(fd, 0, SEEK_END);
|
703 |
} |
704 |
return size;
|
705 |
} |
706 |
#else
|
707 |
static int64_t raw_getlength(BlockDriverState *bs)
|
708 |
{ |
709 |
BDRVRawState *s = bs->opaque; |
710 |
int ret;
|
711 |
|
712 |
ret = fd_open(bs); |
713 |
if (ret < 0) { |
714 |
return ret;
|
715 |
} |
716 |
|
717 |
return lseek(s->fd, 0, SEEK_END); |
718 |
} |
719 |
#endif
|
720 |
|
721 |
static int raw_create(const char *filename, QEMUOptionParameter *options) |
722 |
{ |
723 |
int fd;
|
724 |
int result = 0; |
725 |
int64_t total_size = 0;
|
726 |
|
727 |
/* Read out options */
|
728 |
while (options && options->name) {
|
729 |
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
730 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
731 |
} |
732 |
options++; |
733 |
} |
734 |
|
735 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
736 |
0644);
|
737 |
if (fd < 0) { |
738 |
result = -errno; |
739 |
} else {
|
740 |
if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
741 |
result = -errno; |
742 |
} |
743 |
if (close(fd) != 0) { |
744 |
result = -errno; |
745 |
} |
746 |
} |
747 |
return result;
|
748 |
} |
749 |
|
750 |
static int raw_flush(BlockDriverState *bs) |
751 |
{ |
752 |
BDRVRawState *s = bs->opaque; |
753 |
return qemu_fdatasync(s->fd);
|
754 |
} |
755 |
|
756 |
#ifdef CONFIG_XFS
|
757 |
static int xfs_discard(BDRVRawState *s, int64_t sector_num, int nb_sectors) |
758 |
{ |
759 |
struct xfs_flock64 fl;
|
760 |
|
761 |
memset(&fl, 0, sizeof(fl)); |
762 |
fl.l_whence = SEEK_SET; |
763 |
fl.l_start = sector_num << 9;
|
764 |
fl.l_len = (int64_t)nb_sectors << 9;
|
765 |
|
766 |
if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { |
767 |
DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno));
|
768 |
return -errno;
|
769 |
} |
770 |
|
771 |
return 0; |
772 |
} |
773 |
#endif
|
774 |
|
775 |
static int raw_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors) |
776 |
{ |
777 |
#ifdef CONFIG_XFS
|
778 |
BDRVRawState *s = bs->opaque; |
779 |
|
780 |
if (s->is_xfs) {
|
781 |
return xfs_discard(s, sector_num, nb_sectors);
|
782 |
} |
783 |
#endif
|
784 |
|
785 |
return 0; |
786 |
} |
787 |
|
788 |
static QEMUOptionParameter raw_create_options[] = {
|
789 |
{ |
790 |
.name = BLOCK_OPT_SIZE, |
791 |
.type = OPT_SIZE, |
792 |
.help = "Virtual disk size"
|
793 |
}, |
794 |
{ NULL }
|
795 |
}; |
796 |
|
797 |
static BlockDriver bdrv_file = {
|
798 |
.format_name = "file",
|
799 |
.protocol_name = "file",
|
800 |
.instance_size = sizeof(BDRVRawState),
|
801 |
.bdrv_probe = NULL, /* no probe for protocols */ |
802 |
.bdrv_file_open = raw_open, |
803 |
.bdrv_read = raw_read, |
804 |
.bdrv_write = raw_write, |
805 |
.bdrv_close = raw_close, |
806 |
.bdrv_create = raw_create, |
807 |
.bdrv_flush = raw_flush, |
808 |
.bdrv_discard = raw_discard, |
809 |
|
810 |
.bdrv_aio_readv = raw_aio_readv, |
811 |
.bdrv_aio_writev = raw_aio_writev, |
812 |
.bdrv_aio_flush = raw_aio_flush, |
813 |
|
814 |
.bdrv_truncate = raw_truncate, |
815 |
.bdrv_getlength = raw_getlength, |
816 |
|
817 |
.create_options = raw_create_options, |
818 |
}; |
819 |
|
820 |
/***********************************************/
|
821 |
/* host device */
|
822 |
|
823 |
#ifdef CONFIG_COCOA
|
824 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
825 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
826 |
|
827 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
828 |
{ |
829 |
kern_return_t kernResult; |
830 |
mach_port_t masterPort; |
831 |
CFMutableDictionaryRef classesToMatch; |
832 |
|
833 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
834 |
if ( KERN_SUCCESS != kernResult ) {
|
835 |
printf( "IOMasterPort returned %d\n", kernResult );
|
836 |
} |
837 |
|
838 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
839 |
if ( classesToMatch == NULL ) { |
840 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
841 |
} else {
|
842 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
843 |
} |
844 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
845 |
if ( KERN_SUCCESS != kernResult )
|
846 |
{ |
847 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
848 |
} |
849 |
|
850 |
return kernResult;
|
851 |
} |
852 |
|
853 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
854 |
{ |
855 |
io_object_t nextMedia; |
856 |
kern_return_t kernResult = KERN_FAILURE; |
857 |
*bsdPath = '\0';
|
858 |
nextMedia = IOIteratorNext( mediaIterator ); |
859 |
if ( nextMedia )
|
860 |
{ |
861 |
CFTypeRef bsdPathAsCFString; |
862 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
863 |
if ( bsdPathAsCFString ) {
|
864 |
size_t devPathLength; |
865 |
strcpy( bsdPath, _PATH_DEV ); |
866 |
strcat( bsdPath, "r" );
|
867 |
devPathLength = strlen( bsdPath ); |
868 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
869 |
kernResult = KERN_SUCCESS; |
870 |
} |
871 |
CFRelease( bsdPathAsCFString ); |
872 |
} |
873 |
IOObjectRelease( nextMedia ); |
874 |
} |
875 |
|
876 |
return kernResult;
|
877 |
} |
878 |
|
879 |
#endif
|
880 |
|
881 |
static int hdev_probe_device(const char *filename) |
882 |
{ |
883 |
struct stat st;
|
884 |
|
885 |
/* allow a dedicated CD-ROM driver to match with a higher priority */
|
886 |
if (strstart(filename, "/dev/cdrom", NULL)) |
887 |
return 50; |
888 |
|
889 |
if (stat(filename, &st) >= 0 && |
890 |
(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
891 |
return 100; |
892 |
} |
893 |
|
894 |
return 0; |
895 |
} |
896 |
|
897 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
898 |
{ |
899 |
BDRVRawState *s = bs->opaque; |
900 |
|
901 |
#ifdef CONFIG_COCOA
|
902 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
903 |
kern_return_t kernResult; |
904 |
io_iterator_t mediaIterator; |
905 |
char bsdPath[ MAXPATHLEN ];
|
906 |
int fd;
|
907 |
|
908 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
909 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
910 |
|
911 |
if ( bsdPath[ 0 ] != '\0' ) { |
912 |
strcat(bsdPath,"s0");
|
913 |
/* some CDs don't have a partition 0 */
|
914 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
915 |
if (fd < 0) { |
916 |
bsdPath[strlen(bsdPath)-1] = '1'; |
917 |
} else {
|
918 |
close(fd); |
919 |
} |
920 |
filename = bsdPath; |
921 |
} |
922 |
|
923 |
if ( mediaIterator )
|
924 |
IOObjectRelease( mediaIterator ); |
925 |
} |
926 |
#endif
|
927 |
|
928 |
s->type = FTYPE_FILE; |
929 |
#if defined(__linux__)
|
930 |
{ |
931 |
char resolved_path[ MAXPATHLEN ], *temp;
|
932 |
|
933 |
temp = realpath(filename, resolved_path); |
934 |
if (temp && strstart(temp, "/dev/sg", NULL)) { |
935 |
bs->sg = 1;
|
936 |
} |
937 |
} |
938 |
#endif
|
939 |
|
940 |
return raw_open_common(bs, filename, flags, 0); |
941 |
} |
942 |
|
943 |
#if defined(__linux__)
|
944 |
/* Note: we do not have a reliable method to detect if the floppy is
|
945 |
present. The current method is to try to open the floppy at every
|
946 |
I/O and to keep it opened during a few hundreds of ms. */
|
947 |
static int fd_open(BlockDriverState *bs) |
948 |
{ |
949 |
BDRVRawState *s = bs->opaque; |
950 |
int last_media_present;
|
951 |
|
952 |
if (s->type != FTYPE_FD)
|
953 |
return 0; |
954 |
last_media_present = (s->fd >= 0);
|
955 |
if (s->fd >= 0 && |
956 |
(get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
957 |
close(s->fd); |
958 |
s->fd = -1;
|
959 |
#ifdef DEBUG_FLOPPY
|
960 |
printf("Floppy closed\n");
|
961 |
#endif
|
962 |
} |
963 |
if (s->fd < 0) { |
964 |
if (s->fd_got_error &&
|
965 |
(get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
966 |
#ifdef DEBUG_FLOPPY
|
967 |
printf("No floppy (open delayed)\n");
|
968 |
#endif
|
969 |
return -EIO;
|
970 |
} |
971 |
s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK); |
972 |
if (s->fd < 0) { |
973 |
s->fd_error_time = get_clock(); |
974 |
s->fd_got_error = 1;
|
975 |
if (last_media_present)
|
976 |
s->fd_media_changed = 1;
|
977 |
#ifdef DEBUG_FLOPPY
|
978 |
printf("No floppy\n");
|
979 |
#endif
|
980 |
return -EIO;
|
981 |
} |
982 |
#ifdef DEBUG_FLOPPY
|
983 |
printf("Floppy opened\n");
|
984 |
#endif
|
985 |
} |
986 |
if (!last_media_present)
|
987 |
s->fd_media_changed = 1;
|
988 |
s->fd_open_time = get_clock(); |
989 |
s->fd_got_error = 0;
|
990 |
return 0; |
991 |
} |
992 |
|
993 |
static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
994 |
{ |
995 |
BDRVRawState *s = bs->opaque; |
996 |
|
997 |
return ioctl(s->fd, req, buf);
|
998 |
} |
999 |
|
1000 |
static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
|
1001 |
unsigned long int req, void *buf, |
1002 |
BlockDriverCompletionFunc *cb, void *opaque)
|
1003 |
{ |
1004 |
BDRVRawState *s = bs->opaque; |
1005 |
|
1006 |
if (fd_open(bs) < 0) |
1007 |
return NULL; |
1008 |
return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
|
1009 |
} |
1010 |
|
1011 |
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1012 |
static int fd_open(BlockDriverState *bs) |
1013 |
{ |
1014 |
BDRVRawState *s = bs->opaque; |
1015 |
|
1016 |
/* this is just to ensure s->fd is sane (its called by io ops) */
|
1017 |
if (s->fd >= 0) |
1018 |
return 0; |
1019 |
return -EIO;
|
1020 |
} |
1021 |
#else /* !linux && !FreeBSD */ |
1022 |
|
1023 |
static int fd_open(BlockDriverState *bs) |
1024 |
{ |
1025 |
return 0; |
1026 |
} |
1027 |
|
1028 |
#endif /* !linux && !FreeBSD */ |
1029 |
|
1030 |
static int hdev_create(const char *filename, QEMUOptionParameter *options) |
1031 |
{ |
1032 |
int fd;
|
1033 |
int ret = 0; |
1034 |
struct stat stat_buf;
|
1035 |
int64_t total_size = 0;
|
1036 |
|
1037 |
/* Read out options */
|
1038 |
while (options && options->name) {
|
1039 |
if (!strcmp(options->name, "size")) { |
1040 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
1041 |
} |
1042 |
options++; |
1043 |
} |
1044 |
|
1045 |
fd = open(filename, O_WRONLY | O_BINARY); |
1046 |
if (fd < 0) |
1047 |
return -errno;
|
1048 |
|
1049 |
if (fstat(fd, &stat_buf) < 0) |
1050 |
ret = -errno; |
1051 |
else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
1052 |
ret = -ENODEV; |
1053 |
else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) |
1054 |
ret = -ENOSPC; |
1055 |
|
1056 |
close(fd); |
1057 |
return ret;
|
1058 |
} |
1059 |
|
1060 |
static int hdev_has_zero_init(BlockDriverState *bs) |
1061 |
{ |
1062 |
return 0; |
1063 |
} |
1064 |
|
1065 |
static BlockDriver bdrv_host_device = {
|
1066 |
.format_name = "host_device",
|
1067 |
.protocol_name = "host_device",
|
1068 |
.instance_size = sizeof(BDRVRawState),
|
1069 |
.bdrv_probe_device = hdev_probe_device, |
1070 |
.bdrv_file_open = hdev_open, |
1071 |
.bdrv_close = raw_close, |
1072 |
.bdrv_create = hdev_create, |
1073 |
.create_options = raw_create_options, |
1074 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1075 |
.bdrv_flush = raw_flush, |
1076 |
|
1077 |
.bdrv_aio_readv = raw_aio_readv, |
1078 |
.bdrv_aio_writev = raw_aio_writev, |
1079 |
.bdrv_aio_flush = raw_aio_flush, |
1080 |
|
1081 |
.bdrv_read = raw_read, |
1082 |
.bdrv_write = raw_write, |
1083 |
.bdrv_getlength = raw_getlength, |
1084 |
|
1085 |
/* generic scsi device */
|
1086 |
#ifdef __linux__
|
1087 |
.bdrv_ioctl = hdev_ioctl, |
1088 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1089 |
#endif
|
1090 |
}; |
1091 |
|
1092 |
#ifdef __linux__
|
1093 |
static int floppy_open(BlockDriverState *bs, const char *filename, int flags) |
1094 |
{ |
1095 |
BDRVRawState *s = bs->opaque; |
1096 |
int ret;
|
1097 |
|
1098 |
s->type = FTYPE_FD; |
1099 |
|
1100 |
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
|
1101 |
ret = raw_open_common(bs, filename, flags, O_NONBLOCK); |
1102 |
if (ret)
|
1103 |
return ret;
|
1104 |
|
1105 |
/* close fd so that we can reopen it as needed */
|
1106 |
close(s->fd); |
1107 |
s->fd = -1;
|
1108 |
s->fd_media_changed = 1;
|
1109 |
|
1110 |
return 0; |
1111 |
} |
1112 |
|
1113 |
static int floppy_probe_device(const char *filename) |
1114 |
{ |
1115 |
int fd, ret;
|
1116 |
int prio = 0; |
1117 |
struct floppy_struct fdparam;
|
1118 |
|
1119 |
if (strstart(filename, "/dev/fd", NULL)) |
1120 |
prio = 50;
|
1121 |
|
1122 |
fd = open(filename, O_RDONLY | O_NONBLOCK); |
1123 |
if (fd < 0) { |
1124 |
goto out;
|
1125 |
} |
1126 |
|
1127 |
/* Attempt to detect via a floppy specific ioctl */
|
1128 |
ret = ioctl(fd, FDGETPRM, &fdparam); |
1129 |
if (ret >= 0) |
1130 |
prio = 100;
|
1131 |
|
1132 |
close(fd); |
1133 |
out:
|
1134 |
return prio;
|
1135 |
} |
1136 |
|
1137 |
|
1138 |
static int floppy_is_inserted(BlockDriverState *bs) |
1139 |
{ |
1140 |
return fd_open(bs) >= 0; |
1141 |
} |
1142 |
|
1143 |
static int floppy_media_changed(BlockDriverState *bs) |
1144 |
{ |
1145 |
BDRVRawState *s = bs->opaque; |
1146 |
int ret;
|
1147 |
|
1148 |
/*
|
1149 |
* XXX: we do not have a true media changed indication.
|
1150 |
* It does not work if the floppy is changed without trying to read it.
|
1151 |
*/
|
1152 |
fd_open(bs); |
1153 |
ret = s->fd_media_changed; |
1154 |
s->fd_media_changed = 0;
|
1155 |
#ifdef DEBUG_FLOPPY
|
1156 |
printf("Floppy changed=%d\n", ret);
|
1157 |
#endif
|
1158 |
return ret;
|
1159 |
} |
1160 |
|
1161 |
static int floppy_eject(BlockDriverState *bs, int eject_flag) |
1162 |
{ |
1163 |
BDRVRawState *s = bs->opaque; |
1164 |
int fd;
|
1165 |
|
1166 |
if (s->fd >= 0) { |
1167 |
close(s->fd); |
1168 |
s->fd = -1;
|
1169 |
} |
1170 |
fd = open(bs->filename, s->open_flags | O_NONBLOCK); |
1171 |
if (fd >= 0) { |
1172 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1173 |
perror("FDEJECT");
|
1174 |
close(fd); |
1175 |
} |
1176 |
|
1177 |
return 0; |
1178 |
} |
1179 |
|
1180 |
static BlockDriver bdrv_host_floppy = {
|
1181 |
.format_name = "host_floppy",
|
1182 |
.protocol_name = "host_floppy",
|
1183 |
.instance_size = sizeof(BDRVRawState),
|
1184 |
.bdrv_probe_device = floppy_probe_device, |
1185 |
.bdrv_file_open = floppy_open, |
1186 |
.bdrv_close = raw_close, |
1187 |
.bdrv_create = hdev_create, |
1188 |
.create_options = raw_create_options, |
1189 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1190 |
.bdrv_flush = raw_flush, |
1191 |
|
1192 |
.bdrv_aio_readv = raw_aio_readv, |
1193 |
.bdrv_aio_writev = raw_aio_writev, |
1194 |
.bdrv_aio_flush = raw_aio_flush, |
1195 |
|
1196 |
.bdrv_read = raw_read, |
1197 |
.bdrv_write = raw_write, |
1198 |
.bdrv_getlength = raw_getlength, |
1199 |
|
1200 |
/* removable device support */
|
1201 |
.bdrv_is_inserted = floppy_is_inserted, |
1202 |
.bdrv_media_changed = floppy_media_changed, |
1203 |
.bdrv_eject = floppy_eject, |
1204 |
}; |
1205 |
|
1206 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1207 |
{ |
1208 |
BDRVRawState *s = bs->opaque; |
1209 |
|
1210 |
s->type = FTYPE_CD; |
1211 |
|
1212 |
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
|
1213 |
return raw_open_common(bs, filename, flags, O_NONBLOCK);
|
1214 |
} |
1215 |
|
1216 |
static int cdrom_probe_device(const char *filename) |
1217 |
{ |
1218 |
int fd, ret;
|
1219 |
int prio = 0; |
1220 |
|
1221 |
fd = open(filename, O_RDONLY | O_NONBLOCK); |
1222 |
if (fd < 0) { |
1223 |
goto out;
|
1224 |
} |
1225 |
|
1226 |
/* Attempt to detect via a CDROM specific ioctl */
|
1227 |
ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1228 |
if (ret >= 0) |
1229 |
prio = 100;
|
1230 |
|
1231 |
close(fd); |
1232 |
out:
|
1233 |
return prio;
|
1234 |
} |
1235 |
|
1236 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1237 |
{ |
1238 |
BDRVRawState *s = bs->opaque; |
1239 |
int ret;
|
1240 |
|
1241 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1242 |
if (ret == CDS_DISC_OK)
|
1243 |
return 1; |
1244 |
return 0; |
1245 |
} |
1246 |
|
1247 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1248 |
{ |
1249 |
BDRVRawState *s = bs->opaque; |
1250 |
|
1251 |
if (eject_flag) {
|
1252 |
if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
1253 |
perror("CDROMEJECT");
|
1254 |
} else {
|
1255 |
if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
1256 |
perror("CDROMEJECT");
|
1257 |
} |
1258 |
|
1259 |
return 0; |
1260 |
} |
1261 |
|
1262 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1263 |
{ |
1264 |
BDRVRawState *s = bs->opaque; |
1265 |
|
1266 |
if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1267 |
/*
|
1268 |
* Note: an error can happen if the distribution automatically
|
1269 |
* mounts the CD-ROM
|
1270 |
*/
|
1271 |
/* perror("CDROM_LOCKDOOR"); */
|
1272 |
} |
1273 |
|
1274 |
return 0; |
1275 |
} |
1276 |
|
1277 |
static BlockDriver bdrv_host_cdrom = {
|
1278 |
.format_name = "host_cdrom",
|
1279 |
.protocol_name = "host_cdrom",
|
1280 |
.instance_size = sizeof(BDRVRawState),
|
1281 |
.bdrv_probe_device = cdrom_probe_device, |
1282 |
.bdrv_file_open = cdrom_open, |
1283 |
.bdrv_close = raw_close, |
1284 |
.bdrv_create = hdev_create, |
1285 |
.create_options = raw_create_options, |
1286 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1287 |
.bdrv_flush = raw_flush, |
1288 |
|
1289 |
.bdrv_aio_readv = raw_aio_readv, |
1290 |
.bdrv_aio_writev = raw_aio_writev, |
1291 |
.bdrv_aio_flush = raw_aio_flush, |
1292 |
|
1293 |
.bdrv_read = raw_read, |
1294 |
.bdrv_write = raw_write, |
1295 |
.bdrv_getlength = raw_getlength, |
1296 |
|
1297 |
/* removable device support */
|
1298 |
.bdrv_is_inserted = cdrom_is_inserted, |
1299 |
.bdrv_eject = cdrom_eject, |
1300 |
.bdrv_set_locked = cdrom_set_locked, |
1301 |
|
1302 |
/* generic scsi device */
|
1303 |
.bdrv_ioctl = hdev_ioctl, |
1304 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1305 |
}; |
1306 |
#endif /* __linux__ */ |
1307 |
|
1308 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1309 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1310 |
{ |
1311 |
BDRVRawState *s = bs->opaque; |
1312 |
int ret;
|
1313 |
|
1314 |
s->type = FTYPE_CD; |
1315 |
|
1316 |
ret = raw_open_common(bs, filename, flags, 0);
|
1317 |
if (ret)
|
1318 |
return ret;
|
1319 |
|
1320 |
/* make sure the door isnt locked at this time */
|
1321 |
ioctl(s->fd, CDIOCALLOW); |
1322 |
return 0; |
1323 |
} |
1324 |
|
1325 |
static int cdrom_probe_device(const char *filename) |
1326 |
{ |
1327 |
if (strstart(filename, "/dev/cd", NULL) || |
1328 |
strstart(filename, "/dev/acd", NULL)) |
1329 |
return 100; |
1330 |
return 0; |
1331 |
} |
1332 |
|
1333 |
static int cdrom_reopen(BlockDriverState *bs) |
1334 |
{ |
1335 |
BDRVRawState *s = bs->opaque; |
1336 |
int fd;
|
1337 |
|
1338 |
/*
|
1339 |
* Force reread of possibly changed/newly loaded disc,
|
1340 |
* FreeBSD seems to not notice sometimes...
|
1341 |
*/
|
1342 |
if (s->fd >= 0) |
1343 |
close(s->fd); |
1344 |
fd = open(bs->filename, s->open_flags, 0644);
|
1345 |
if (fd < 0) { |
1346 |
s->fd = -1;
|
1347 |
return -EIO;
|
1348 |
} |
1349 |
s->fd = fd; |
1350 |
|
1351 |
/* make sure the door isnt locked at this time */
|
1352 |
ioctl(s->fd, CDIOCALLOW); |
1353 |
return 0; |
1354 |
} |
1355 |
|
1356 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1357 |
{ |
1358 |
return raw_getlength(bs) > 0; |
1359 |
} |
1360 |
|
1361 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1362 |
{ |
1363 |
BDRVRawState *s = bs->opaque; |
1364 |
|
1365 |
if (s->fd < 0) |
1366 |
return -ENOTSUP;
|
1367 |
|
1368 |
(void) ioctl(s->fd, CDIOCALLOW);
|
1369 |
|
1370 |
if (eject_flag) {
|
1371 |
if (ioctl(s->fd, CDIOCEJECT) < 0) |
1372 |
perror("CDIOCEJECT");
|
1373 |
} else {
|
1374 |
if (ioctl(s->fd, CDIOCCLOSE) < 0) |
1375 |
perror("CDIOCCLOSE");
|
1376 |
} |
1377 |
|
1378 |
if (cdrom_reopen(bs) < 0) |
1379 |
return -ENOTSUP;
|
1380 |
return 0; |
1381 |
} |
1382 |
|
1383 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1384 |
{ |
1385 |
BDRVRawState *s = bs->opaque; |
1386 |
|
1387 |
if (s->fd < 0) |
1388 |
return -ENOTSUP;
|
1389 |
if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
1390 |
/*
|
1391 |
* Note: an error can happen if the distribution automatically
|
1392 |
* mounts the CD-ROM
|
1393 |
*/
|
1394 |
/* perror("CDROM_LOCKDOOR"); */
|
1395 |
} |
1396 |
|
1397 |
return 0; |
1398 |
} |
1399 |
|
1400 |
static BlockDriver bdrv_host_cdrom = {
|
1401 |
.format_name = "host_cdrom",
|
1402 |
.protocol_name = "host_cdrom",
|
1403 |
.instance_size = sizeof(BDRVRawState),
|
1404 |
.bdrv_probe_device = cdrom_probe_device, |
1405 |
.bdrv_file_open = cdrom_open, |
1406 |
.bdrv_close = raw_close, |
1407 |
.bdrv_create = hdev_create, |
1408 |
.create_options = raw_create_options, |
1409 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1410 |
.bdrv_flush = raw_flush, |
1411 |
|
1412 |
.bdrv_aio_readv = raw_aio_readv, |
1413 |
.bdrv_aio_writev = raw_aio_writev, |
1414 |
.bdrv_aio_flush = raw_aio_flush, |
1415 |
|
1416 |
.bdrv_read = raw_read, |
1417 |
.bdrv_write = raw_write, |
1418 |
.bdrv_getlength = raw_getlength, |
1419 |
|
1420 |
/* removable device support */
|
1421 |
.bdrv_is_inserted = cdrom_is_inserted, |
1422 |
.bdrv_eject = cdrom_eject, |
1423 |
.bdrv_set_locked = cdrom_set_locked, |
1424 |
}; |
1425 |
#endif /* __FreeBSD__ */ |
1426 |
|
1427 |
static void bdrv_file_init(void) |
1428 |
{ |
1429 |
/*
|
1430 |
* Register all the drivers. Note that order is important, the driver
|
1431 |
* registered last will get probed first.
|
1432 |
*/
|
1433 |
bdrv_register(&bdrv_file); |
1434 |
bdrv_register(&bdrv_host_device); |
1435 |
#ifdef __linux__
|
1436 |
bdrv_register(&bdrv_host_floppy); |
1437 |
bdrv_register(&bdrv_host_cdrom); |
1438 |
#endif
|
1439 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1440 |
bdrv_register(&bdrv_host_cdrom); |
1441 |
#endif
|
1442 |
} |
1443 |
|
1444 |
block_init(bdrv_file_init); |