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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 |
|
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#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> |
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#include <IOKit/storage/IOCDMedia.h> |
40 |
//#include <IOKit/storage/IOCDTypes.h>
|
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#include <CoreFoundation/CoreFoundation.h> |
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#endif
|
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|
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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> |
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#endif
|
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#ifdef __linux__
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#include <sys/ioctl.h> |
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#include <linux/cdrom.h> |
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#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> |
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#include <sys/cdio.h> |
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#endif
|
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|
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#ifdef __OpenBSD__
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#include <sys/ioctl.h> |
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#include <sys/disklabel.h> |
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#include <sys/dkio.h> |
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#endif
|
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|
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#ifdef __DragonFly__
|
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#include <sys/ioctl.h> |
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#include <sys/diskslice.h> |
69 |
#endif
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70 |
|
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//#define DEBUG_FLOPPY
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|
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//#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) |
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#else
|
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#define DEBUG_BLOCK_PRINT(formatCstr, ...)
|
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#endif
|
80 |
|
81 |
/* 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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|
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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 |
98 |
|
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#define ALIGNED_BUFFER_SIZE (32 * 512) |
100 |
|
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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 |
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|
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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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} BDRVRawState; |
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__) || defined(__FreeBSD_kernel__)
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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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s->open_flags = open_flags | O_BINARY; |
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s->open_flags &= ~O_ACCMODE; |
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if (bdrv_flags & BDRV_O_RDWR) {
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s->open_flags |= O_RDWR; |
140 |
} else {
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s->open_flags |= O_RDONLY; |
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} |
143 |
|
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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; |
150 |
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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; |
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if (ret == -EROFS)
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ret = -EACCES; |
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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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s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE); |
164 |
if (s->aligned_buf == NULL) { |
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goto out_close;
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} |
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} |
168 |
|
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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)) { |
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/* We're falling back to POSIX AIO in some cases */
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paio_init(); |
175 |
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s->aio_ctx = laio_init(); |
177 |
if (!s->aio_ctx) {
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goto out_free_buf;
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} |
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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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} |
191 |
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return 0; |
193 |
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out_free_buf:
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qemu_vfree(s->aligned_buf); |
196 |
out_close:
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close(fd); |
198 |
return -errno;
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} |
200 |
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static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
202 |
{ |
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BDRVRawState *s = bs->opaque; |
204 |
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s->type = FTYPE_FILE; |
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return raw_open_common(bs, filename, flags, 0); |
207 |
} |
208 |
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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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/*
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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; |
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int ret;
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ret = fd_open(bs); |
240 |
if (ret < 0) |
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return ret;
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ret = pread(s->fd, buf, count, offset); |
244 |
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) { |
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int64_t size = raw_getlength(bs); |
250 |
if (offset >= size) {
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memset(buf, 0, count);
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return count;
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} |
254 |
} |
255 |
|
256 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
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"] read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
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bs->total_sectors, ret, errno, strerror(errno)); |
260 |
|
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/* Try harder for CDrom. */
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if (s->type != FTYPE_FILE) {
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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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ret = pread(s->fd, buf, count, offset); |
267 |
if (ret == count)
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return ret;
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269 |
|
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DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
271 |
"] retry read failed %d : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
273 |
bs->total_sectors, ret, errno, strerror(errno)); |
274 |
} |
275 |
|
276 |
return (ret < 0) ? -errno : ret; |
277 |
} |
278 |
|
279 |
/*
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280 |
* offset and count are in bytes, but must be multiples of 512 for files
|
281 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
|
282 |
*
|
283 |
* This function may be called without alignment if the caller ensures
|
284 |
* that O_DIRECT is not in effect.
|
285 |
*/
|
286 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
287 |
const uint8_t *buf, int count) |
288 |
{ |
289 |
BDRVRawState *s = bs->opaque; |
290 |
int ret;
|
291 |
|
292 |
ret = fd_open(bs); |
293 |
if (ret < 0) |
294 |
return -errno;
|
295 |
|
296 |
ret = pwrite(s->fd, buf, count, offset); |
297 |
if (ret == count)
|
298 |
return ret;
|
299 |
|
300 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
301 |
"] write failed %d : %d = %s\n",
|
302 |
s->fd, bs->filename, offset, buf, count, |
303 |
bs->total_sectors, ret, errno, strerror(errno)); |
304 |
|
305 |
return (ret < 0) ? -errno : ret; |
306 |
} |
307 |
|
308 |
|
309 |
/*
|
310 |
* offset and count are in bytes and possibly not aligned. For files opened
|
311 |
* with O_DIRECT, necessary alignments are ensured before calling
|
312 |
* raw_pread_aligned to do the actual read.
|
313 |
*/
|
314 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
315 |
uint8_t *buf, int count)
|
316 |
{ |
317 |
BDRVRawState *s = bs->opaque; |
318 |
int size, ret, shift, sum;
|
319 |
|
320 |
sum = 0;
|
321 |
|
322 |
if (s->aligned_buf != NULL) { |
323 |
|
324 |
if (offset & 0x1ff) { |
325 |
/* align offset on a 512 bytes boundary */
|
326 |
|
327 |
shift = offset & 0x1ff;
|
328 |
size = (shift + count + 0x1ff) & ~0x1ff; |
329 |
if (size > ALIGNED_BUFFER_SIZE)
|
330 |
size = ALIGNED_BUFFER_SIZE; |
331 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
332 |
if (ret < 0) |
333 |
return ret;
|
334 |
|
335 |
size = 512 - shift;
|
336 |
if (size > count)
|
337 |
size = count; |
338 |
memcpy(buf, s->aligned_buf + shift, size); |
339 |
|
340 |
buf += size; |
341 |
offset += size; |
342 |
count -= size; |
343 |
sum += size; |
344 |
|
345 |
if (count == 0) |
346 |
return sum;
|
347 |
} |
348 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
349 |
|
350 |
/* read on aligned buffer */
|
351 |
|
352 |
while (count) {
|
353 |
|
354 |
size = (count + 0x1ff) & ~0x1ff; |
355 |
if (size > ALIGNED_BUFFER_SIZE)
|
356 |
size = ALIGNED_BUFFER_SIZE; |
357 |
|
358 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
359 |
if (ret < 0) { |
360 |
return ret;
|
361 |
} else if (ret == 0) { |
362 |
fprintf(stderr, "raw_pread: read beyond end of file\n");
|
363 |
abort(); |
364 |
} |
365 |
|
366 |
size = ret; |
367 |
if (size > count)
|
368 |
size = count; |
369 |
|
370 |
memcpy(buf, s->aligned_buf, size); |
371 |
|
372 |
buf += size; |
373 |
offset += size; |
374 |
count -= size; |
375 |
sum += size; |
376 |
} |
377 |
|
378 |
return sum;
|
379 |
} |
380 |
} |
381 |
|
382 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
383 |
} |
384 |
|
385 |
static int raw_read(BlockDriverState *bs, int64_t sector_num, |
386 |
uint8_t *buf, int nb_sectors)
|
387 |
{ |
388 |
int ret;
|
389 |
|
390 |
ret = raw_pread(bs, sector_num * BDRV_SECTOR_SIZE, buf, |
391 |
nb_sectors * BDRV_SECTOR_SIZE); |
392 |
if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
|
393 |
ret = 0;
|
394 |
return ret;
|
395 |
} |
396 |
|
397 |
/*
|
398 |
* offset and count are in bytes and possibly not aligned. For files opened
|
399 |
* with O_DIRECT, necessary alignments are ensured before calling
|
400 |
* raw_pwrite_aligned to do the actual write.
|
401 |
*/
|
402 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
403 |
const uint8_t *buf, int count) |
404 |
{ |
405 |
BDRVRawState *s = bs->opaque; |
406 |
int size, ret, shift, sum;
|
407 |
|
408 |
sum = 0;
|
409 |
|
410 |
if (s->aligned_buf != NULL) { |
411 |
|
412 |
if (offset & 0x1ff) { |
413 |
/* align offset on a 512 bytes boundary */
|
414 |
shift = offset & 0x1ff;
|
415 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
416 |
if (ret < 0) |
417 |
return ret;
|
418 |
|
419 |
size = 512 - shift;
|
420 |
if (size > count)
|
421 |
size = count; |
422 |
memcpy(s->aligned_buf + shift, buf, size); |
423 |
|
424 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
425 |
if (ret < 0) |
426 |
return ret;
|
427 |
|
428 |
buf += size; |
429 |
offset += size; |
430 |
count -= size; |
431 |
sum += size; |
432 |
|
433 |
if (count == 0) |
434 |
return sum;
|
435 |
} |
436 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
437 |
|
438 |
while ((size = (count & ~0x1ff)) != 0) { |
439 |
|
440 |
if (size > ALIGNED_BUFFER_SIZE)
|
441 |
size = ALIGNED_BUFFER_SIZE; |
442 |
|
443 |
memcpy(s->aligned_buf, buf, size); |
444 |
|
445 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
446 |
if (ret < 0) |
447 |
return ret;
|
448 |
|
449 |
buf += ret; |
450 |
offset += ret; |
451 |
count -= ret; |
452 |
sum += ret; |
453 |
} |
454 |
/* here, count < 512 because (count & ~0x1ff) == 0 */
|
455 |
if (count) {
|
456 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
457 |
if (ret < 0) |
458 |
return ret;
|
459 |
memcpy(s->aligned_buf, buf, count); |
460 |
|
461 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
462 |
if (ret < 0) |
463 |
return ret;
|
464 |
if (count < ret)
|
465 |
ret = count; |
466 |
|
467 |
sum += ret; |
468 |
} |
469 |
return sum;
|
470 |
} |
471 |
} |
472 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
473 |
} |
474 |
|
475 |
static int raw_write(BlockDriverState *bs, int64_t sector_num, |
476 |
const uint8_t *buf, int nb_sectors) |
477 |
{ |
478 |
int ret;
|
479 |
ret = raw_pwrite(bs, sector_num * BDRV_SECTOR_SIZE, buf, |
480 |
nb_sectors * BDRV_SECTOR_SIZE); |
481 |
if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
|
482 |
ret = 0;
|
483 |
return ret;
|
484 |
} |
485 |
|
486 |
/*
|
487 |
* Check if all memory in this vector is sector aligned.
|
488 |
*/
|
489 |
static int qiov_is_aligned(QEMUIOVector *qiov) |
490 |
{ |
491 |
int i;
|
492 |
|
493 |
for (i = 0; i < qiov->niov; i++) { |
494 |
if ((uintptr_t) qiov->iov[i].iov_base % BDRV_SECTOR_SIZE) {
|
495 |
return 0; |
496 |
} |
497 |
} |
498 |
|
499 |
return 1; |
500 |
} |
501 |
|
502 |
static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
|
503 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
504 |
BlockDriverCompletionFunc *cb, void *opaque, int type) |
505 |
{ |
506 |
BDRVRawState *s = bs->opaque; |
507 |
|
508 |
if (fd_open(bs) < 0) |
509 |
return NULL; |
510 |
|
511 |
/*
|
512 |
* If O_DIRECT is used the buffer needs to be aligned on a sector
|
513 |
* boundary. Check if this is the case or telll the low-level
|
514 |
* driver that it needs to copy the buffer.
|
515 |
*/
|
516 |
if (s->aligned_buf) {
|
517 |
if (!qiov_is_aligned(qiov)) {
|
518 |
type |= QEMU_AIO_MISALIGNED; |
519 |
#ifdef CONFIG_LINUX_AIO
|
520 |
} else if (s->use_aio) { |
521 |
return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
|
522 |
nb_sectors, cb, opaque, type); |
523 |
#endif
|
524 |
} |
525 |
} |
526 |
|
527 |
return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
|
528 |
cb, opaque, type); |
529 |
} |
530 |
|
531 |
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
|
532 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
533 |
BlockDriverCompletionFunc *cb, void *opaque)
|
534 |
{ |
535 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
536 |
cb, opaque, QEMU_AIO_READ); |
537 |
} |
538 |
|
539 |
static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
|
540 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
541 |
BlockDriverCompletionFunc *cb, void *opaque)
|
542 |
{ |
543 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
544 |
cb, opaque, QEMU_AIO_WRITE); |
545 |
} |
546 |
|
547 |
static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
|
548 |
BlockDriverCompletionFunc *cb, void *opaque)
|
549 |
{ |
550 |
BDRVRawState *s = bs->opaque; |
551 |
|
552 |
if (fd_open(bs) < 0) |
553 |
return NULL; |
554 |
|
555 |
return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
556 |
} |
557 |
|
558 |
static void raw_close(BlockDriverState *bs) |
559 |
{ |
560 |
BDRVRawState *s = bs->opaque; |
561 |
if (s->fd >= 0) { |
562 |
close(s->fd); |
563 |
s->fd = -1;
|
564 |
if (s->aligned_buf != NULL) |
565 |
qemu_vfree(s->aligned_buf); |
566 |
} |
567 |
} |
568 |
|
569 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
570 |
{ |
571 |
BDRVRawState *s = bs->opaque; |
572 |
if (s->type != FTYPE_FILE)
|
573 |
return -ENOTSUP;
|
574 |
if (ftruncate(s->fd, offset) < 0) |
575 |
return -errno;
|
576 |
return 0; |
577 |
} |
578 |
|
579 |
#ifdef __OpenBSD__
|
580 |
static int64_t raw_getlength(BlockDriverState *bs)
|
581 |
{ |
582 |
BDRVRawState *s = bs->opaque; |
583 |
int fd = s->fd;
|
584 |
struct stat st;
|
585 |
|
586 |
if (fstat(fd, &st))
|
587 |
return -1; |
588 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
589 |
struct disklabel dl;
|
590 |
|
591 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
592 |
return -1; |
593 |
return (uint64_t)dl.d_secsize *
|
594 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
595 |
} else
|
596 |
return st.st_size;
|
597 |
} |
598 |
#elif defined(__sun__)
|
599 |
static int64_t raw_getlength(BlockDriverState *bs)
|
600 |
{ |
601 |
BDRVRawState *s = bs->opaque; |
602 |
struct dk_minfo minfo;
|
603 |
int ret;
|
604 |
|
605 |
ret = fd_open(bs); |
606 |
if (ret < 0) { |
607 |
return ret;
|
608 |
} |
609 |
|
610 |
/*
|
611 |
* Use the DKIOCGMEDIAINFO ioctl to read the size.
|
612 |
*/
|
613 |
ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); |
614 |
if (ret != -1) { |
615 |
return minfo.dki_lbsize * minfo.dki_capacity;
|
616 |
} |
617 |
|
618 |
/*
|
619 |
* There are reports that lseek on some devices fails, but
|
620 |
* irc discussion said that contingency on contingency was overkill.
|
621 |
*/
|
622 |
return lseek(s->fd, 0, SEEK_END); |
623 |
} |
624 |
#elif defined(CONFIG_BSD)
|
625 |
static int64_t raw_getlength(BlockDriverState *bs)
|
626 |
{ |
627 |
BDRVRawState *s = bs->opaque; |
628 |
int fd = s->fd;
|
629 |
int64_t size; |
630 |
struct stat sb;
|
631 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
632 |
int reopened = 0; |
633 |
#endif
|
634 |
int ret;
|
635 |
|
636 |
ret = fd_open(bs); |
637 |
if (ret < 0) |
638 |
return ret;
|
639 |
|
640 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
641 |
again:
|
642 |
#endif
|
643 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
644 |
#ifdef DIOCGMEDIASIZE
|
645 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
646 |
#elif defined(DIOCGPART)
|
647 |
{ |
648 |
struct partinfo pi;
|
649 |
if (ioctl(fd, DIOCGPART, &pi) == 0) |
650 |
size = pi.media_size; |
651 |
else
|
652 |
size = 0;
|
653 |
} |
654 |
if (size == 0) |
655 |
#endif
|
656 |
#ifdef CONFIG_COCOA
|
657 |
size = LONG_LONG_MAX; |
658 |
#else
|
659 |
size = lseek(fd, 0LL, SEEK_END);
|
660 |
#endif
|
661 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
662 |
switch(s->type) {
|
663 |
case FTYPE_CD:
|
664 |
/* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
|
665 |
if (size == 2048LL * (unsigned)-1) |
666 |
size = 0;
|
667 |
/* XXX no disc? maybe we need to reopen... */
|
668 |
if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
669 |
reopened = 1;
|
670 |
goto again;
|
671 |
} |
672 |
} |
673 |
#endif
|
674 |
} else {
|
675 |
size = lseek(fd, 0, SEEK_END);
|
676 |
} |
677 |
return size;
|
678 |
} |
679 |
#else
|
680 |
static int64_t raw_getlength(BlockDriverState *bs)
|
681 |
{ |
682 |
BDRVRawState *s = bs->opaque; |
683 |
int ret;
|
684 |
|
685 |
ret = fd_open(bs); |
686 |
if (ret < 0) { |
687 |
return ret;
|
688 |
} |
689 |
|
690 |
return lseek(s->fd, 0, SEEK_END); |
691 |
} |
692 |
#endif
|
693 |
|
694 |
static int raw_create(const char *filename, QEMUOptionParameter *options) |
695 |
{ |
696 |
int fd;
|
697 |
int result = 0; |
698 |
int64_t total_size = 0;
|
699 |
|
700 |
/* Read out options */
|
701 |
while (options && options->name) {
|
702 |
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
703 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
704 |
} |
705 |
options++; |
706 |
} |
707 |
|
708 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
709 |
0644);
|
710 |
if (fd < 0) { |
711 |
result = -errno; |
712 |
} else {
|
713 |
if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
714 |
result = -errno; |
715 |
} |
716 |
if (close(fd) != 0) { |
717 |
result = -errno; |
718 |
} |
719 |
} |
720 |
return result;
|
721 |
} |
722 |
|
723 |
static void raw_flush(BlockDriverState *bs) |
724 |
{ |
725 |
BDRVRawState *s = bs->opaque; |
726 |
qemu_fdatasync(s->fd); |
727 |
} |
728 |
|
729 |
|
730 |
static QEMUOptionParameter raw_create_options[] = {
|
731 |
{ |
732 |
.name = BLOCK_OPT_SIZE, |
733 |
.type = OPT_SIZE, |
734 |
.help = "Virtual disk size"
|
735 |
}, |
736 |
{ NULL }
|
737 |
}; |
738 |
|
739 |
static BlockDriver bdrv_file = {
|
740 |
.format_name = "file",
|
741 |
.protocol_name = "file",
|
742 |
.instance_size = sizeof(BDRVRawState),
|
743 |
.bdrv_probe = NULL, /* no probe for protocols */ |
744 |
.bdrv_file_open = raw_open, |
745 |
.bdrv_read = raw_read, |
746 |
.bdrv_write = raw_write, |
747 |
.bdrv_close = raw_close, |
748 |
.bdrv_create = raw_create, |
749 |
.bdrv_flush = raw_flush, |
750 |
|
751 |
.bdrv_aio_readv = raw_aio_readv, |
752 |
.bdrv_aio_writev = raw_aio_writev, |
753 |
.bdrv_aio_flush = raw_aio_flush, |
754 |
|
755 |
.bdrv_truncate = raw_truncate, |
756 |
.bdrv_getlength = raw_getlength, |
757 |
|
758 |
.create_options = raw_create_options, |
759 |
}; |
760 |
|
761 |
/***********************************************/
|
762 |
/* host device */
|
763 |
|
764 |
#ifdef CONFIG_COCOA
|
765 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
766 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
767 |
|
768 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
769 |
{ |
770 |
kern_return_t kernResult; |
771 |
mach_port_t masterPort; |
772 |
CFMutableDictionaryRef classesToMatch; |
773 |
|
774 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
775 |
if ( KERN_SUCCESS != kernResult ) {
|
776 |
printf( "IOMasterPort returned %d\n", kernResult );
|
777 |
} |
778 |
|
779 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
780 |
if ( classesToMatch == NULL ) { |
781 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
782 |
} else {
|
783 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
784 |
} |
785 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
786 |
if ( KERN_SUCCESS != kernResult )
|
787 |
{ |
788 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
789 |
} |
790 |
|
791 |
return kernResult;
|
792 |
} |
793 |
|
794 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
795 |
{ |
796 |
io_object_t nextMedia; |
797 |
kern_return_t kernResult = KERN_FAILURE; |
798 |
*bsdPath = '\0';
|
799 |
nextMedia = IOIteratorNext( mediaIterator ); |
800 |
if ( nextMedia )
|
801 |
{ |
802 |
CFTypeRef bsdPathAsCFString; |
803 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
804 |
if ( bsdPathAsCFString ) {
|
805 |
size_t devPathLength; |
806 |
strcpy( bsdPath, _PATH_DEV ); |
807 |
strcat( bsdPath, "r" );
|
808 |
devPathLength = strlen( bsdPath ); |
809 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
810 |
kernResult = KERN_SUCCESS; |
811 |
} |
812 |
CFRelease( bsdPathAsCFString ); |
813 |
} |
814 |
IOObjectRelease( nextMedia ); |
815 |
} |
816 |
|
817 |
return kernResult;
|
818 |
} |
819 |
|
820 |
#endif
|
821 |
|
822 |
static int hdev_probe_device(const char *filename) |
823 |
{ |
824 |
struct stat st;
|
825 |
|
826 |
/* allow a dedicated CD-ROM driver to match with a higher priority */
|
827 |
if (strstart(filename, "/dev/cdrom", NULL)) |
828 |
return 50; |
829 |
|
830 |
if (stat(filename, &st) >= 0 && |
831 |
(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
832 |
return 100; |
833 |
} |
834 |
|
835 |
return 0; |
836 |
} |
837 |
|
838 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
839 |
{ |
840 |
BDRVRawState *s = bs->opaque; |
841 |
|
842 |
#ifdef CONFIG_COCOA
|
843 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
844 |
kern_return_t kernResult; |
845 |
io_iterator_t mediaIterator; |
846 |
char bsdPath[ MAXPATHLEN ];
|
847 |
int fd;
|
848 |
|
849 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
850 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
851 |
|
852 |
if ( bsdPath[ 0 ] != '\0' ) { |
853 |
strcat(bsdPath,"s0");
|
854 |
/* some CDs don't have a partition 0 */
|
855 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
856 |
if (fd < 0) { |
857 |
bsdPath[strlen(bsdPath)-1] = '1'; |
858 |
} else {
|
859 |
close(fd); |
860 |
} |
861 |
filename = bsdPath; |
862 |
} |
863 |
|
864 |
if ( mediaIterator )
|
865 |
IOObjectRelease( mediaIterator ); |
866 |
} |
867 |
#endif
|
868 |
|
869 |
s->type = FTYPE_FILE; |
870 |
#if defined(__linux__)
|
871 |
if (strstart(filename, "/dev/sg", NULL)) { |
872 |
bs->sg = 1;
|
873 |
} |
874 |
#endif
|
875 |
|
876 |
return raw_open_common(bs, filename, flags, 0); |
877 |
} |
878 |
|
879 |
#if defined(__linux__)
|
880 |
/* Note: we do not have a reliable method to detect if the floppy is
|
881 |
present. The current method is to try to open the floppy at every
|
882 |
I/O and to keep it opened during a few hundreds of ms. */
|
883 |
static int fd_open(BlockDriverState *bs) |
884 |
{ |
885 |
BDRVRawState *s = bs->opaque; |
886 |
int last_media_present;
|
887 |
|
888 |
if (s->type != FTYPE_FD)
|
889 |
return 0; |
890 |
last_media_present = (s->fd >= 0);
|
891 |
if (s->fd >= 0 && |
892 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
893 |
close(s->fd); |
894 |
s->fd = -1;
|
895 |
#ifdef DEBUG_FLOPPY
|
896 |
printf("Floppy closed\n");
|
897 |
#endif
|
898 |
} |
899 |
if (s->fd < 0) { |
900 |
if (s->fd_got_error &&
|
901 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
902 |
#ifdef DEBUG_FLOPPY
|
903 |
printf("No floppy (open delayed)\n");
|
904 |
#endif
|
905 |
return -EIO;
|
906 |
} |
907 |
s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK); |
908 |
if (s->fd < 0) { |
909 |
s->fd_error_time = qemu_get_clock(rt_clock); |
910 |
s->fd_got_error = 1;
|
911 |
if (last_media_present)
|
912 |
s->fd_media_changed = 1;
|
913 |
#ifdef DEBUG_FLOPPY
|
914 |
printf("No floppy\n");
|
915 |
#endif
|
916 |
return -EIO;
|
917 |
} |
918 |
#ifdef DEBUG_FLOPPY
|
919 |
printf("Floppy opened\n");
|
920 |
#endif
|
921 |
} |
922 |
if (!last_media_present)
|
923 |
s->fd_media_changed = 1;
|
924 |
s->fd_open_time = qemu_get_clock(rt_clock); |
925 |
s->fd_got_error = 0;
|
926 |
return 0; |
927 |
} |
928 |
|
929 |
static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
930 |
{ |
931 |
BDRVRawState *s = bs->opaque; |
932 |
|
933 |
return ioctl(s->fd, req, buf);
|
934 |
} |
935 |
|
936 |
static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
|
937 |
unsigned long int req, void *buf, |
938 |
BlockDriverCompletionFunc *cb, void *opaque)
|
939 |
{ |
940 |
BDRVRawState *s = bs->opaque; |
941 |
|
942 |
if (fd_open(bs) < 0) |
943 |
return NULL; |
944 |
return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
|
945 |
} |
946 |
|
947 |
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
948 |
static int fd_open(BlockDriverState *bs) |
949 |
{ |
950 |
BDRVRawState *s = bs->opaque; |
951 |
|
952 |
/* this is just to ensure s->fd is sane (its called by io ops) */
|
953 |
if (s->fd >= 0) |
954 |
return 0; |
955 |
return -EIO;
|
956 |
} |
957 |
#else /* !linux && !FreeBSD */ |
958 |
|
959 |
static int fd_open(BlockDriverState *bs) |
960 |
{ |
961 |
return 0; |
962 |
} |
963 |
|
964 |
#endif /* !linux && !FreeBSD */ |
965 |
|
966 |
static int hdev_create(const char *filename, QEMUOptionParameter *options) |
967 |
{ |
968 |
int fd;
|
969 |
int ret = 0; |
970 |
struct stat stat_buf;
|
971 |
int64_t total_size = 0;
|
972 |
|
973 |
/* Read out options */
|
974 |
while (options && options->name) {
|
975 |
if (!strcmp(options->name, "size")) { |
976 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
977 |
} |
978 |
options++; |
979 |
} |
980 |
|
981 |
fd = open(filename, O_WRONLY | O_BINARY); |
982 |
if (fd < 0) |
983 |
return -errno;
|
984 |
|
985 |
if (fstat(fd, &stat_buf) < 0) |
986 |
ret = -errno; |
987 |
else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
988 |
ret = -ENODEV; |
989 |
else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) |
990 |
ret = -ENOSPC; |
991 |
|
992 |
close(fd); |
993 |
return ret;
|
994 |
} |
995 |
|
996 |
static BlockDriver bdrv_host_device = {
|
997 |
.format_name = "host_device",
|
998 |
.protocol_name = "host_device",
|
999 |
.instance_size = sizeof(BDRVRawState),
|
1000 |
.bdrv_probe_device = hdev_probe_device, |
1001 |
.bdrv_file_open = hdev_open, |
1002 |
.bdrv_close = raw_close, |
1003 |
.bdrv_create = hdev_create, |
1004 |
.create_options = raw_create_options, |
1005 |
.no_zero_init = 1,
|
1006 |
.bdrv_flush = raw_flush, |
1007 |
|
1008 |
.bdrv_aio_readv = raw_aio_readv, |
1009 |
.bdrv_aio_writev = raw_aio_writev, |
1010 |
.bdrv_aio_flush = raw_aio_flush, |
1011 |
|
1012 |
.bdrv_read = raw_read, |
1013 |
.bdrv_write = raw_write, |
1014 |
.bdrv_getlength = raw_getlength, |
1015 |
|
1016 |
/* generic scsi device */
|
1017 |
#ifdef __linux__
|
1018 |
.bdrv_ioctl = hdev_ioctl, |
1019 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1020 |
#endif
|
1021 |
}; |
1022 |
|
1023 |
#ifdef __linux__
|
1024 |
static int floppy_open(BlockDriverState *bs, const char *filename, int flags) |
1025 |
{ |
1026 |
BDRVRawState *s = bs->opaque; |
1027 |
int ret;
|
1028 |
|
1029 |
s->type = FTYPE_FD; |
1030 |
|
1031 |
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
|
1032 |
ret = raw_open_common(bs, filename, flags, O_NONBLOCK); |
1033 |
if (ret)
|
1034 |
return ret;
|
1035 |
|
1036 |
/* close fd so that we can reopen it as needed */
|
1037 |
close(s->fd); |
1038 |
s->fd = -1;
|
1039 |
s->fd_media_changed = 1;
|
1040 |
|
1041 |
return 0; |
1042 |
} |
1043 |
|
1044 |
static int floppy_probe_device(const char *filename) |
1045 |
{ |
1046 |
int fd, ret;
|
1047 |
int prio = 0; |
1048 |
struct floppy_struct fdparam;
|
1049 |
|
1050 |
if (strstart(filename, "/dev/fd", NULL)) |
1051 |
prio = 50;
|
1052 |
|
1053 |
fd = open(filename, O_RDONLY | O_NONBLOCK); |
1054 |
if (fd < 0) { |
1055 |
goto out;
|
1056 |
} |
1057 |
|
1058 |
/* Attempt to detect via a floppy specific ioctl */
|
1059 |
ret = ioctl(fd, FDGETPRM, &fdparam); |
1060 |
if (ret >= 0) |
1061 |
prio = 100;
|
1062 |
|
1063 |
close(fd); |
1064 |
out:
|
1065 |
return prio;
|
1066 |
} |
1067 |
|
1068 |
|
1069 |
static int floppy_is_inserted(BlockDriverState *bs) |
1070 |
{ |
1071 |
return fd_open(bs) >= 0; |
1072 |
} |
1073 |
|
1074 |
static int floppy_media_changed(BlockDriverState *bs) |
1075 |
{ |
1076 |
BDRVRawState *s = bs->opaque; |
1077 |
int ret;
|
1078 |
|
1079 |
/*
|
1080 |
* XXX: we do not have a true media changed indication.
|
1081 |
* It does not work if the floppy is changed without trying to read it.
|
1082 |
*/
|
1083 |
fd_open(bs); |
1084 |
ret = s->fd_media_changed; |
1085 |
s->fd_media_changed = 0;
|
1086 |
#ifdef DEBUG_FLOPPY
|
1087 |
printf("Floppy changed=%d\n", ret);
|
1088 |
#endif
|
1089 |
return ret;
|
1090 |
} |
1091 |
|
1092 |
static int floppy_eject(BlockDriverState *bs, int eject_flag) |
1093 |
{ |
1094 |
BDRVRawState *s = bs->opaque; |
1095 |
int fd;
|
1096 |
|
1097 |
if (s->fd >= 0) { |
1098 |
close(s->fd); |
1099 |
s->fd = -1;
|
1100 |
} |
1101 |
fd = open(bs->filename, s->open_flags | O_NONBLOCK); |
1102 |
if (fd >= 0) { |
1103 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1104 |
perror("FDEJECT");
|
1105 |
close(fd); |
1106 |
} |
1107 |
|
1108 |
return 0; |
1109 |
} |
1110 |
|
1111 |
static BlockDriver bdrv_host_floppy = {
|
1112 |
.format_name = "host_floppy",
|
1113 |
.protocol_name = "host_floppy",
|
1114 |
.instance_size = sizeof(BDRVRawState),
|
1115 |
.bdrv_probe_device = floppy_probe_device, |
1116 |
.bdrv_file_open = floppy_open, |
1117 |
.bdrv_close = raw_close, |
1118 |
.bdrv_create = hdev_create, |
1119 |
.create_options = raw_create_options, |
1120 |
.no_zero_init = 1,
|
1121 |
.bdrv_flush = raw_flush, |
1122 |
|
1123 |
.bdrv_aio_readv = raw_aio_readv, |
1124 |
.bdrv_aio_writev = raw_aio_writev, |
1125 |
.bdrv_aio_flush = raw_aio_flush, |
1126 |
|
1127 |
.bdrv_read = raw_read, |
1128 |
.bdrv_write = raw_write, |
1129 |
.bdrv_getlength = raw_getlength, |
1130 |
|
1131 |
/* removable device support */
|
1132 |
.bdrv_is_inserted = floppy_is_inserted, |
1133 |
.bdrv_media_changed = floppy_media_changed, |
1134 |
.bdrv_eject = floppy_eject, |
1135 |
}; |
1136 |
|
1137 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1138 |
{ |
1139 |
BDRVRawState *s = bs->opaque; |
1140 |
|
1141 |
s->type = FTYPE_CD; |
1142 |
|
1143 |
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
|
1144 |
return raw_open_common(bs, filename, flags, O_NONBLOCK);
|
1145 |
} |
1146 |
|
1147 |
static int cdrom_probe_device(const char *filename) |
1148 |
{ |
1149 |
int fd, ret;
|
1150 |
int prio = 0; |
1151 |
|
1152 |
if (strstart(filename, "/dev/cd", NULL)) |
1153 |
prio = 50;
|
1154 |
|
1155 |
fd = open(filename, O_RDONLY | O_NONBLOCK); |
1156 |
if (fd < 0) { |
1157 |
goto out;
|
1158 |
} |
1159 |
|
1160 |
/* Attempt to detect via a CDROM specific ioctl */
|
1161 |
ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1162 |
if (ret >= 0) |
1163 |
prio = 100;
|
1164 |
|
1165 |
close(fd); |
1166 |
out:
|
1167 |
return prio;
|
1168 |
} |
1169 |
|
1170 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1171 |
{ |
1172 |
BDRVRawState *s = bs->opaque; |
1173 |
int ret;
|
1174 |
|
1175 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1176 |
if (ret == CDS_DISC_OK)
|
1177 |
return 1; |
1178 |
return 0; |
1179 |
} |
1180 |
|
1181 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1182 |
{ |
1183 |
BDRVRawState *s = bs->opaque; |
1184 |
|
1185 |
if (eject_flag) {
|
1186 |
if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
1187 |
perror("CDROMEJECT");
|
1188 |
} else {
|
1189 |
if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
1190 |
perror("CDROMEJECT");
|
1191 |
} |
1192 |
|
1193 |
return 0; |
1194 |
} |
1195 |
|
1196 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1197 |
{ |
1198 |
BDRVRawState *s = bs->opaque; |
1199 |
|
1200 |
if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1201 |
/*
|
1202 |
* Note: an error can happen if the distribution automatically
|
1203 |
* mounts the CD-ROM
|
1204 |
*/
|
1205 |
/* perror("CDROM_LOCKDOOR"); */
|
1206 |
} |
1207 |
|
1208 |
return 0; |
1209 |
} |
1210 |
|
1211 |
static BlockDriver bdrv_host_cdrom = {
|
1212 |
.format_name = "host_cdrom",
|
1213 |
.protocol_name = "host_cdrom",
|
1214 |
.instance_size = sizeof(BDRVRawState),
|
1215 |
.bdrv_probe_device = cdrom_probe_device, |
1216 |
.bdrv_file_open = cdrom_open, |
1217 |
.bdrv_close = raw_close, |
1218 |
.bdrv_create = hdev_create, |
1219 |
.create_options = raw_create_options, |
1220 |
.no_zero_init = 1,
|
1221 |
.bdrv_flush = raw_flush, |
1222 |
|
1223 |
.bdrv_aio_readv = raw_aio_readv, |
1224 |
.bdrv_aio_writev = raw_aio_writev, |
1225 |
.bdrv_aio_flush = raw_aio_flush, |
1226 |
|
1227 |
.bdrv_read = raw_read, |
1228 |
.bdrv_write = raw_write, |
1229 |
.bdrv_getlength = raw_getlength, |
1230 |
|
1231 |
/* removable device support */
|
1232 |
.bdrv_is_inserted = cdrom_is_inserted, |
1233 |
.bdrv_eject = cdrom_eject, |
1234 |
.bdrv_set_locked = cdrom_set_locked, |
1235 |
|
1236 |
/* generic scsi device */
|
1237 |
.bdrv_ioctl = hdev_ioctl, |
1238 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1239 |
}; |
1240 |
#endif /* __linux__ */ |
1241 |
|
1242 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1243 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1244 |
{ |
1245 |
BDRVRawState *s = bs->opaque; |
1246 |
int ret;
|
1247 |
|
1248 |
s->type = FTYPE_CD; |
1249 |
|
1250 |
ret = raw_open_common(bs, filename, flags, 0);
|
1251 |
if (ret)
|
1252 |
return ret;
|
1253 |
|
1254 |
/* make sure the door isnt locked at this time */
|
1255 |
ioctl(s->fd, CDIOCALLOW); |
1256 |
return 0; |
1257 |
} |
1258 |
|
1259 |
static int cdrom_probe_device(const char *filename) |
1260 |
{ |
1261 |
if (strstart(filename, "/dev/cd", NULL) || |
1262 |
strstart(filename, "/dev/acd", NULL)) |
1263 |
return 100; |
1264 |
return 0; |
1265 |
} |
1266 |
|
1267 |
static int cdrom_reopen(BlockDriverState *bs) |
1268 |
{ |
1269 |
BDRVRawState *s = bs->opaque; |
1270 |
int fd;
|
1271 |
|
1272 |
/*
|
1273 |
* Force reread of possibly changed/newly loaded disc,
|
1274 |
* FreeBSD seems to not notice sometimes...
|
1275 |
*/
|
1276 |
if (s->fd >= 0) |
1277 |
close(s->fd); |
1278 |
fd = open(bs->filename, s->open_flags, 0644);
|
1279 |
if (fd < 0) { |
1280 |
s->fd = -1;
|
1281 |
return -EIO;
|
1282 |
} |
1283 |
s->fd = fd; |
1284 |
|
1285 |
/* make sure the door isnt locked at this time */
|
1286 |
ioctl(s->fd, CDIOCALLOW); |
1287 |
return 0; |
1288 |
} |
1289 |
|
1290 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1291 |
{ |
1292 |
return raw_getlength(bs) > 0; |
1293 |
} |
1294 |
|
1295 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1296 |
{ |
1297 |
BDRVRawState *s = bs->opaque; |
1298 |
|
1299 |
if (s->fd < 0) |
1300 |
return -ENOTSUP;
|
1301 |
|
1302 |
(void) ioctl(s->fd, CDIOCALLOW);
|
1303 |
|
1304 |
if (eject_flag) {
|
1305 |
if (ioctl(s->fd, CDIOCEJECT) < 0) |
1306 |
perror("CDIOCEJECT");
|
1307 |
} else {
|
1308 |
if (ioctl(s->fd, CDIOCCLOSE) < 0) |
1309 |
perror("CDIOCCLOSE");
|
1310 |
} |
1311 |
|
1312 |
if (cdrom_reopen(bs) < 0) |
1313 |
return -ENOTSUP;
|
1314 |
return 0; |
1315 |
} |
1316 |
|
1317 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1318 |
{ |
1319 |
BDRVRawState *s = bs->opaque; |
1320 |
|
1321 |
if (s->fd < 0) |
1322 |
return -ENOTSUP;
|
1323 |
if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
1324 |
/*
|
1325 |
* Note: an error can happen if the distribution automatically
|
1326 |
* mounts the CD-ROM
|
1327 |
*/
|
1328 |
/* perror("CDROM_LOCKDOOR"); */
|
1329 |
} |
1330 |
|
1331 |
return 0; |
1332 |
} |
1333 |
|
1334 |
static BlockDriver bdrv_host_cdrom = {
|
1335 |
.format_name = "host_cdrom",
|
1336 |
.protocol_name = "host_cdrom",
|
1337 |
.instance_size = sizeof(BDRVRawState),
|
1338 |
.bdrv_probe_device = cdrom_probe_device, |
1339 |
.bdrv_file_open = cdrom_open, |
1340 |
.bdrv_close = raw_close, |
1341 |
.bdrv_create = hdev_create, |
1342 |
.create_options = raw_create_options, |
1343 |
.no_zero_init = 1,
|
1344 |
.bdrv_flush = raw_flush, |
1345 |
|
1346 |
.bdrv_aio_readv = raw_aio_readv, |
1347 |
.bdrv_aio_writev = raw_aio_writev, |
1348 |
.bdrv_aio_flush = raw_aio_flush, |
1349 |
|
1350 |
.bdrv_read = raw_read, |
1351 |
.bdrv_write = raw_write, |
1352 |
.bdrv_getlength = raw_getlength, |
1353 |
|
1354 |
/* removable device support */
|
1355 |
.bdrv_is_inserted = cdrom_is_inserted, |
1356 |
.bdrv_eject = cdrom_eject, |
1357 |
.bdrv_set_locked = cdrom_set_locked, |
1358 |
}; |
1359 |
#endif /* __FreeBSD__ */ |
1360 |
|
1361 |
static void bdrv_file_init(void) |
1362 |
{ |
1363 |
/*
|
1364 |
* Register all the drivers. Note that order is important, the driver
|
1365 |
* registered last will get probed first.
|
1366 |
*/
|
1367 |
bdrv_register(&bdrv_file); |
1368 |
bdrv_register(&bdrv_host_device); |
1369 |
#ifdef __linux__
|
1370 |
bdrv_register(&bdrv_host_floppy); |
1371 |
bdrv_register(&bdrv_host_cdrom); |
1372 |
#endif
|
1373 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1374 |
bdrv_register(&bdrv_host_cdrom); |
1375 |
#endif
|
1376 |
} |
1377 |
|
1378 |
block_init(bdrv_file_init); |