root / block / raw-posix.c @ fc32a72d
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/*
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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 |
#if defined(__APPLE__) && (__MACH__)
|
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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>
|
| 41 |
#include <CoreFoundation/CoreFoundation.h> |
| 42 |
#endif
|
| 43 |
|
| 44 |
#ifdef __sun__
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#define _POSIX_PTHREAD_SEMANTICS 1 |
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#include <sys/dkio.h> |
| 47 |
#endif
|
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#ifdef __linux__
|
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#include <sys/types.h> |
| 50 |
#include <sys/stat.h> |
| 51 |
#include <sys/ioctl.h> |
| 52 |
#include <sys/param.h> |
| 53 |
#include <linux/cdrom.h> |
| 54 |
#include <linux/fd.h> |
| 55 |
#include <linux/fs.h> |
| 56 |
#endif
|
| 57 |
#ifdef CONFIG_FIEMAP
|
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#include <linux/fiemap.h> |
| 59 |
#endif
|
| 60 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
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#include <sys/disk.h> |
| 62 |
#include <sys/cdio.h> |
| 63 |
#endif
|
| 64 |
|
| 65 |
#ifdef __OpenBSD__
|
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#include <sys/ioctl.h> |
| 67 |
#include <sys/disklabel.h> |
| 68 |
#include <sys/dkio.h> |
| 69 |
#endif
|
| 70 |
|
| 71 |
#ifdef __NetBSD__
|
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#include <sys/ioctl.h> |
| 73 |
#include <sys/disklabel.h> |
| 74 |
#include <sys/dkio.h> |
| 75 |
#include <sys/disk.h> |
| 76 |
#endif
|
| 77 |
|
| 78 |
#ifdef __DragonFly__
|
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#include <sys/ioctl.h> |
| 80 |
#include <sys/diskslice.h> |
| 81 |
#endif
|
| 82 |
|
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#ifdef CONFIG_XFS
|
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#include <xfs/xfs.h> |
| 85 |
#endif
|
| 86 |
|
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//#define DEBUG_FLOPPY
|
| 88 |
|
| 89 |
//#define DEBUG_BLOCK
|
| 90 |
#if defined(DEBUG_BLOCK)
|
| 91 |
#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
|
| 96 |
|
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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
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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 |
| 114 |
|
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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) |
| 118 |
|
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#define MAX_BLOCKSIZE 4096 |
| 120 |
|
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typedef struct BDRVRawState { |
| 122 |
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; |
| 128 |
int64_t fd_error_time; |
| 129 |
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; |
| 137 |
unsigned aligned_buf_size;
|
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#ifdef CONFIG_XFS
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bool is_xfs : 1; |
| 140 |
#endif
|
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} BDRVRawState; |
| 142 |
|
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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); |
| 148 |
#endif
|
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|
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#if defined(__NetBSD__)
|
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static int raw_normalize_devicepath(const char **filename) |
| 152 |
{
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static char namebuf[PATH_MAX]; |
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const char *dp, *fname; |
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struct stat sb;
|
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|
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fname = *filename; |
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dp = strrchr(fname, '/');
|
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if (lstat(fname, &sb) < 0) { |
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fprintf(stderr, "%s: stat failed: %s\n",
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fname, strerror(errno)); |
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return -errno;
|
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} |
| 164 |
|
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if (!S_ISBLK(sb.st_mode)) {
|
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return 0; |
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} |
| 168 |
|
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if (dp == NULL) { |
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snprintf(namebuf, PATH_MAX, "r%s", fname);
|
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} else {
|
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snprintf(namebuf, PATH_MAX, "%.*s/r%s",
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(int)(dp - fname), fname, dp + 1); |
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} |
| 175 |
fprintf(stderr, "%s is a block device", fname);
|
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*filename = namebuf; |
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fprintf(stderr, ", using %s\n", *filename);
|
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|
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return 0; |
| 180 |
} |
| 181 |
#else
|
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static int raw_normalize_devicepath(const char **filename) |
| 183 |
{
|
| 184 |
return 0; |
| 185 |
} |
| 186 |
#endif
|
| 187 |
|
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#ifdef CONFIG_LINUX_AIO
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static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) |
| 190 |
{
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int ret = -1; |
| 192 |
assert(aio_ctx != NULL);
|
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assert(use_aio != NULL);
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/*
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* Currently Linux do AIO only for files opened with O_DIRECT
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* specified so check NOCACHE flag too
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*/
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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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|
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/* if non-NULL, laio_init() has already been run */
|
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if (*aio_ctx == NULL) { |
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*aio_ctx = laio_init(); |
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if (!*aio_ctx) {
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goto error;
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} |
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} |
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*use_aio = 1;
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} else {
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*use_aio = 0;
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} |
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|
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ret = 0;
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|
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error:
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return ret;
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} |
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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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ret = raw_normalize_devicepath(&filename); |
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if (ret != 0) { |
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return ret;
|
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} |
| 230 |
|
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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; |
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} else {
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s->open_flags |= O_RDONLY; |
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} |
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|
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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; |
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|
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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; |
| 250 |
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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/*
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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); |
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if (s->aligned_buf == NULL) { |
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goto out_close;
|
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} |
| 267 |
} |
| 268 |
|
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/* We're falling back to POSIX AIO in some cases so init always */
|
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if (paio_init() < 0) { |
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goto out_free_buf;
|
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} |
| 273 |
|
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#ifdef CONFIG_LINUX_AIO
|
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if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
|
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goto out_close;
|
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} |
| 278 |
#endif
|
| 279 |
|
| 280 |
#ifdef CONFIG_XFS
|
| 281 |
if (platform_test_xfs_fd(s->fd)) {
|
| 282 |
s->is_xfs = 1;
|
| 283 |
} |
| 284 |
#endif
|
| 285 |
|
| 286 |
return 0; |
| 287 |
|
| 288 |
out_free_buf:
|
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qemu_vfree(s->aligned_buf); |
| 290 |
out_close:
|
| 291 |
qemu_close(fd); |
| 292 |
return -errno;
|
| 293 |
} |
| 294 |
|
| 295 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
| 296 |
{
|
| 297 |
BDRVRawState *s = bs->opaque; |
| 298 |
|
| 299 |
s->type = FTYPE_FILE; |
| 300 |
return raw_open_common(bs, filename, flags, 0); |
| 301 |
} |
| 302 |
|
| 303 |
/* XXX: use host sector size if necessary with:
|
| 304 |
#ifdef DIOCGSECTORSIZE
|
| 305 |
{
|
| 306 |
unsigned int sectorsize = 512;
|
| 307 |
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
|
| 308 |
sectorsize > bufsize)
|
| 309 |
bufsize = sectorsize;
|
| 310 |
}
|
| 311 |
#endif
|
| 312 |
#ifdef CONFIG_COCOA
|
| 313 |
uint32_t blockSize = 512;
|
| 314 |
if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
|
| 315 |
bufsize = blockSize;
|
| 316 |
}
|
| 317 |
#endif
|
| 318 |
*/
|
| 319 |
|
| 320 |
/*
|
| 321 |
* Check if all memory in this vector is sector aligned.
|
| 322 |
*/
|
| 323 |
static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov) |
| 324 |
{
|
| 325 |
int i;
|
| 326 |
|
| 327 |
for (i = 0; i < qiov->niov; i++) { |
| 328 |
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
|
| 329 |
return 0; |
| 330 |
} |
| 331 |
} |
| 332 |
|
| 333 |
return 1; |
| 334 |
} |
| 335 |
|
| 336 |
static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
|
| 337 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
| 338 |
BlockDriverCompletionFunc *cb, void *opaque, int type) |
| 339 |
{
|
| 340 |
BDRVRawState *s = bs->opaque; |
| 341 |
|
| 342 |
if (fd_open(bs) < 0) |
| 343 |
return NULL; |
| 344 |
|
| 345 |
/*
|
| 346 |
* If O_DIRECT is used the buffer needs to be aligned on a sector
|
| 347 |
* boundary. Check if this is the case or tell the low-level
|
| 348 |
* driver that it needs to copy the buffer.
|
| 349 |
*/
|
| 350 |
if (s->aligned_buf) {
|
| 351 |
if (!qiov_is_aligned(bs, qiov)) {
|
| 352 |
type |= QEMU_AIO_MISALIGNED; |
| 353 |
#ifdef CONFIG_LINUX_AIO
|
| 354 |
} else if (s->use_aio) { |
| 355 |
return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
|
| 356 |
nb_sectors, cb, opaque, type); |
| 357 |
#endif
|
| 358 |
} |
| 359 |
} |
| 360 |
|
| 361 |
return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
|
| 362 |
cb, opaque, type); |
| 363 |
} |
| 364 |
|
| 365 |
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
|
| 366 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
| 367 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 368 |
{
|
| 369 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
| 370 |
cb, opaque, QEMU_AIO_READ); |
| 371 |
} |
| 372 |
|
| 373 |
static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
|
| 374 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
| 375 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 376 |
{
|
| 377 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
| 378 |
cb, opaque, QEMU_AIO_WRITE); |
| 379 |
} |
| 380 |
|
| 381 |
static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
|
| 382 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 383 |
{
|
| 384 |
BDRVRawState *s = bs->opaque; |
| 385 |
|
| 386 |
if (fd_open(bs) < 0) |
| 387 |
return NULL; |
| 388 |
|
| 389 |
return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
| 390 |
} |
| 391 |
|
| 392 |
static void raw_close(BlockDriverState *bs) |
| 393 |
{
|
| 394 |
BDRVRawState *s = bs->opaque; |
| 395 |
if (s->fd >= 0) { |
| 396 |
qemu_close(s->fd); |
| 397 |
s->fd = -1;
|
| 398 |
if (s->aligned_buf != NULL) |
| 399 |
qemu_vfree(s->aligned_buf); |
| 400 |
} |
| 401 |
} |
| 402 |
|
| 403 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
| 404 |
{
|
| 405 |
BDRVRawState *s = bs->opaque; |
| 406 |
struct stat st;
|
| 407 |
|
| 408 |
if (fstat(s->fd, &st)) {
|
| 409 |
return -errno;
|
| 410 |
} |
| 411 |
|
| 412 |
if (S_ISREG(st.st_mode)) {
|
| 413 |
if (ftruncate(s->fd, offset) < 0) { |
| 414 |
return -errno;
|
| 415 |
} |
| 416 |
} else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
| 417 |
if (offset > raw_getlength(bs)) {
|
| 418 |
return -EINVAL;
|
| 419 |
} |
| 420 |
} else {
|
| 421 |
return -ENOTSUP;
|
| 422 |
} |
| 423 |
|
| 424 |
return 0; |
| 425 |
} |
| 426 |
|
| 427 |
#ifdef __OpenBSD__
|
| 428 |
static int64_t raw_getlength(BlockDriverState *bs)
|
| 429 |
{
|
| 430 |
BDRVRawState *s = bs->opaque; |
| 431 |
int fd = s->fd;
|
| 432 |
struct stat st;
|
| 433 |
|
| 434 |
if (fstat(fd, &st))
|
| 435 |
return -1; |
| 436 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
| 437 |
struct disklabel dl;
|
| 438 |
|
| 439 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
| 440 |
return -1; |
| 441 |
return (uint64_t)dl.d_secsize *
|
| 442 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
| 443 |
} else
|
| 444 |
return st.st_size;
|
| 445 |
} |
| 446 |
#elif defined(__NetBSD__)
|
| 447 |
static int64_t raw_getlength(BlockDriverState *bs)
|
| 448 |
{
|
| 449 |
BDRVRawState *s = bs->opaque; |
| 450 |
int fd = s->fd;
|
| 451 |
struct stat st;
|
| 452 |
|
| 453 |
if (fstat(fd, &st))
|
| 454 |
return -1; |
| 455 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
| 456 |
struct dkwedge_info dkw;
|
| 457 |
|
| 458 |
if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { |
| 459 |
return dkw.dkw_size * 512; |
| 460 |
} else {
|
| 461 |
struct disklabel dl;
|
| 462 |
|
| 463 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
| 464 |
return -1; |
| 465 |
return (uint64_t)dl.d_secsize *
|
| 466 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
| 467 |
} |
| 468 |
} else
|
| 469 |
return st.st_size;
|
| 470 |
} |
| 471 |
#elif defined(__sun__)
|
| 472 |
static int64_t raw_getlength(BlockDriverState *bs)
|
| 473 |
{
|
| 474 |
BDRVRawState *s = bs->opaque; |
| 475 |
struct dk_minfo minfo;
|
| 476 |
int ret;
|
| 477 |
|
| 478 |
ret = fd_open(bs); |
| 479 |
if (ret < 0) { |
| 480 |
return ret;
|
| 481 |
} |
| 482 |
|
| 483 |
/*
|
| 484 |
* Use the DKIOCGMEDIAINFO ioctl to read the size.
|
| 485 |
*/
|
| 486 |
ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); |
| 487 |
if (ret != -1) { |
| 488 |
return minfo.dki_lbsize * minfo.dki_capacity;
|
| 489 |
} |
| 490 |
|
| 491 |
/*
|
| 492 |
* There are reports that lseek on some devices fails, but
|
| 493 |
* irc discussion said that contingency on contingency was overkill.
|
| 494 |
*/
|
| 495 |
return lseek(s->fd, 0, SEEK_END); |
| 496 |
} |
| 497 |
#elif defined(CONFIG_BSD)
|
| 498 |
static int64_t raw_getlength(BlockDriverState *bs)
|
| 499 |
{
|
| 500 |
BDRVRawState *s = bs->opaque; |
| 501 |
int fd = s->fd;
|
| 502 |
int64_t size; |
| 503 |
struct stat sb;
|
| 504 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 505 |
int reopened = 0; |
| 506 |
#endif
|
| 507 |
int ret;
|
| 508 |
|
| 509 |
ret = fd_open(bs); |
| 510 |
if (ret < 0) |
| 511 |
return ret;
|
| 512 |
|
| 513 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 514 |
again:
|
| 515 |
#endif
|
| 516 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
| 517 |
#ifdef DIOCGMEDIASIZE
|
| 518 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
| 519 |
#elif defined(DIOCGPART)
|
| 520 |
{
|
| 521 |
struct partinfo pi;
|
| 522 |
if (ioctl(fd, DIOCGPART, &pi) == 0) |
| 523 |
size = pi.media_size; |
| 524 |
else
|
| 525 |
size = 0;
|
| 526 |
} |
| 527 |
if (size == 0) |
| 528 |
#endif
|
| 529 |
#if defined(__APPLE__) && defined(__MACH__)
|
| 530 |
size = LONG_LONG_MAX; |
| 531 |
#else
|
| 532 |
size = lseek(fd, 0LL, SEEK_END);
|
| 533 |
#endif
|
| 534 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 535 |
switch(s->type) {
|
| 536 |
case FTYPE_CD:
|
| 537 |
/* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
|
| 538 |
if (size == 2048LL * (unsigned)-1) |
| 539 |
size = 0;
|
| 540 |
/* XXX no disc? maybe we need to reopen... */
|
| 541 |
if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
| 542 |
reopened = 1;
|
| 543 |
goto again;
|
| 544 |
} |
| 545 |
} |
| 546 |
#endif
|
| 547 |
} else {
|
| 548 |
size = lseek(fd, 0, SEEK_END);
|
| 549 |
} |
| 550 |
return size;
|
| 551 |
} |
| 552 |
#else
|
| 553 |
static int64_t raw_getlength(BlockDriverState *bs)
|
| 554 |
{
|
| 555 |
BDRVRawState *s = bs->opaque; |
| 556 |
int ret;
|
| 557 |
|
| 558 |
ret = fd_open(bs); |
| 559 |
if (ret < 0) { |
| 560 |
return ret;
|
| 561 |
} |
| 562 |
|
| 563 |
return lseek(s->fd, 0, SEEK_END); |
| 564 |
} |
| 565 |
#endif
|
| 566 |
|
| 567 |
static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
|
| 568 |
{
|
| 569 |
struct stat st;
|
| 570 |
BDRVRawState *s = bs->opaque; |
| 571 |
|
| 572 |
if (fstat(s->fd, &st) < 0) { |
| 573 |
return -errno;
|
| 574 |
} |
| 575 |
return (int64_t)st.st_blocks * 512; |
| 576 |
} |
| 577 |
|
| 578 |
static int raw_create(const char *filename, QEMUOptionParameter *options) |
| 579 |
{
|
| 580 |
int fd;
|
| 581 |
int result = 0; |
| 582 |
int64_t total_size = 0;
|
| 583 |
|
| 584 |
/* Read out options */
|
| 585 |
while (options && options->name) {
|
| 586 |
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
| 587 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
| 588 |
} |
| 589 |
options++; |
| 590 |
} |
| 591 |
|
| 592 |
fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
| 593 |
0644);
|
| 594 |
if (fd < 0) { |
| 595 |
result = -errno; |
| 596 |
} else {
|
| 597 |
if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
| 598 |
result = -errno; |
| 599 |
} |
| 600 |
if (qemu_close(fd) != 0) { |
| 601 |
result = -errno; |
| 602 |
} |
| 603 |
} |
| 604 |
return result;
|
| 605 |
} |
| 606 |
|
| 607 |
/*
|
| 608 |
* Returns true iff the specified sector is present in the disk image. Drivers
|
| 609 |
* not implementing the functionality are assumed to not support backing files,
|
| 610 |
* hence all their sectors are reported as allocated.
|
| 611 |
*
|
| 612 |
* If 'sector_num' is beyond the end of the disk image the return value is 0
|
| 613 |
* and 'pnum' is set to 0.
|
| 614 |
*
|
| 615 |
* 'pnum' is set to the number of sectors (including and immediately following
|
| 616 |
* the specified sector) that are known to be in the same
|
| 617 |
* allocated/unallocated state.
|
| 618 |
*
|
| 619 |
* 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
|
| 620 |
* beyond the end of the disk image it will be clamped.
|
| 621 |
*/
|
| 622 |
static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs, |
| 623 |
int64_t sector_num, |
| 624 |
int nb_sectors, int *pnum) |
| 625 |
{
|
| 626 |
off_t start, data, hole; |
| 627 |
int ret;
|
| 628 |
|
| 629 |
ret = fd_open(bs); |
| 630 |
if (ret < 0) { |
| 631 |
return ret;
|
| 632 |
} |
| 633 |
|
| 634 |
start = sector_num * BDRV_SECTOR_SIZE; |
| 635 |
|
| 636 |
#ifdef CONFIG_FIEMAP
|
| 637 |
|
| 638 |
BDRVRawState *s = bs->opaque; |
| 639 |
struct {
|
| 640 |
struct fiemap fm;
|
| 641 |
struct fiemap_extent fe;
|
| 642 |
} f; |
| 643 |
|
| 644 |
f.fm.fm_start = start; |
| 645 |
f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE; |
| 646 |
f.fm.fm_flags = 0;
|
| 647 |
f.fm.fm_extent_count = 1;
|
| 648 |
f.fm.fm_reserved = 0;
|
| 649 |
if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) { |
| 650 |
/* Assume everything is allocated. */
|
| 651 |
*pnum = nb_sectors; |
| 652 |
return 1; |
| 653 |
} |
| 654 |
|
| 655 |
if (f.fm.fm_mapped_extents == 0) { |
| 656 |
/* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length.
|
| 657 |
* f.fm.fm_start + f.fm.fm_length must be clamped to the file size!
|
| 658 |
*/
|
| 659 |
off_t length = lseek(s->fd, 0, SEEK_END);
|
| 660 |
hole = f.fm.fm_start; |
| 661 |
data = MIN(f.fm.fm_start + f.fm.fm_length, length); |
| 662 |
} else {
|
| 663 |
data = f.fe.fe_logical; |
| 664 |
hole = f.fe.fe_logical + f.fe.fe_length; |
| 665 |
} |
| 666 |
|
| 667 |
#elif defined SEEK_HOLE && defined SEEK_DATA
|
| 668 |
|
| 669 |
BDRVRawState *s = bs->opaque; |
| 670 |
|
| 671 |
hole = lseek(s->fd, start, SEEK_HOLE); |
| 672 |
if (hole == -1) { |
| 673 |
/* -ENXIO indicates that sector_num was past the end of the file.
|
| 674 |
* There is a virtual hole there. */
|
| 675 |
assert(errno != -ENXIO); |
| 676 |
|
| 677 |
/* Most likely EINVAL. Assume everything is allocated. */
|
| 678 |
*pnum = nb_sectors; |
| 679 |
return 1; |
| 680 |
} |
| 681 |
|
| 682 |
if (hole > start) {
|
| 683 |
data = start; |
| 684 |
} else {
|
| 685 |
/* On a hole. We need another syscall to find its end. */
|
| 686 |
data = lseek(s->fd, start, SEEK_DATA); |
| 687 |
if (data == -1) { |
| 688 |
data = lseek(s->fd, 0, SEEK_END);
|
| 689 |
} |
| 690 |
} |
| 691 |
#else
|
| 692 |
*pnum = nb_sectors; |
| 693 |
return 1; |
| 694 |
#endif
|
| 695 |
|
| 696 |
if (data <= start) {
|
| 697 |
/* On a data extent, compute sectors to the end of the extent. */
|
| 698 |
*pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); |
| 699 |
return 1; |
| 700 |
} else {
|
| 701 |
/* On a hole, compute sectors to the beginning of the next extent. */
|
| 702 |
*pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); |
| 703 |
return 0; |
| 704 |
} |
| 705 |
} |
| 706 |
|
| 707 |
#ifdef CONFIG_XFS
|
| 708 |
static int xfs_discard(BDRVRawState *s, int64_t sector_num, int nb_sectors) |
| 709 |
{
|
| 710 |
struct xfs_flock64 fl;
|
| 711 |
|
| 712 |
memset(&fl, 0, sizeof(fl)); |
| 713 |
fl.l_whence = SEEK_SET; |
| 714 |
fl.l_start = sector_num << 9;
|
| 715 |
fl.l_len = (int64_t)nb_sectors << 9;
|
| 716 |
|
| 717 |
if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { |
| 718 |
DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno));
|
| 719 |
return -errno;
|
| 720 |
} |
| 721 |
|
| 722 |
return 0; |
| 723 |
} |
| 724 |
#endif
|
| 725 |
|
| 726 |
static coroutine_fn int raw_co_discard(BlockDriverState *bs, |
| 727 |
int64_t sector_num, int nb_sectors)
|
| 728 |
{
|
| 729 |
#ifdef CONFIG_XFS
|
| 730 |
BDRVRawState *s = bs->opaque; |
| 731 |
|
| 732 |
if (s->is_xfs) {
|
| 733 |
return xfs_discard(s, sector_num, nb_sectors);
|
| 734 |
} |
| 735 |
#endif
|
| 736 |
|
| 737 |
return 0; |
| 738 |
} |
| 739 |
|
| 740 |
static QEMUOptionParameter raw_create_options[] = {
|
| 741 |
{
|
| 742 |
.name = BLOCK_OPT_SIZE, |
| 743 |
.type = OPT_SIZE, |
| 744 |
.help = "Virtual disk size"
|
| 745 |
}, |
| 746 |
{ NULL }
|
| 747 |
}; |
| 748 |
|
| 749 |
static BlockDriver bdrv_file = {
|
| 750 |
.format_name = "file",
|
| 751 |
.protocol_name = "file",
|
| 752 |
.instance_size = sizeof(BDRVRawState),
|
| 753 |
.bdrv_probe = NULL, /* no probe for protocols */ |
| 754 |
.bdrv_file_open = raw_open, |
| 755 |
.bdrv_close = raw_close, |
| 756 |
.bdrv_create = raw_create, |
| 757 |
.bdrv_co_discard = raw_co_discard, |
| 758 |
.bdrv_co_is_allocated = raw_co_is_allocated, |
| 759 |
|
| 760 |
.bdrv_aio_readv = raw_aio_readv, |
| 761 |
.bdrv_aio_writev = raw_aio_writev, |
| 762 |
.bdrv_aio_flush = raw_aio_flush, |
| 763 |
|
| 764 |
.bdrv_truncate = raw_truncate, |
| 765 |
.bdrv_getlength = raw_getlength, |
| 766 |
.bdrv_get_allocated_file_size |
| 767 |
= raw_get_allocated_file_size, |
| 768 |
|
| 769 |
.create_options = raw_create_options, |
| 770 |
}; |
| 771 |
|
| 772 |
/***********************************************/
|
| 773 |
/* host device */
|
| 774 |
|
| 775 |
#if defined(__APPLE__) && defined(__MACH__)
|
| 776 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
| 777 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
| 778 |
|
| 779 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
| 780 |
{
|
| 781 |
kern_return_t kernResult; |
| 782 |
mach_port_t masterPort; |
| 783 |
CFMutableDictionaryRef classesToMatch; |
| 784 |
|
| 785 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
| 786 |
if ( KERN_SUCCESS != kernResult ) {
|
| 787 |
printf( "IOMasterPort returned %d\n", kernResult );
|
| 788 |
} |
| 789 |
|
| 790 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
| 791 |
if ( classesToMatch == NULL ) { |
| 792 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
| 793 |
} else {
|
| 794 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
| 795 |
} |
| 796 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
| 797 |
if ( KERN_SUCCESS != kernResult )
|
| 798 |
{
|
| 799 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
| 800 |
} |
| 801 |
|
| 802 |
return kernResult;
|
| 803 |
} |
| 804 |
|
| 805 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
| 806 |
{
|
| 807 |
io_object_t nextMedia; |
| 808 |
kern_return_t kernResult = KERN_FAILURE; |
| 809 |
*bsdPath = '\0';
|
| 810 |
nextMedia = IOIteratorNext( mediaIterator ); |
| 811 |
if ( nextMedia )
|
| 812 |
{
|
| 813 |
CFTypeRef bsdPathAsCFString; |
| 814 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
| 815 |
if ( bsdPathAsCFString ) {
|
| 816 |
size_t devPathLength; |
| 817 |
strcpy( bsdPath, _PATH_DEV ); |
| 818 |
strcat( bsdPath, "r" );
|
| 819 |
devPathLength = strlen( bsdPath ); |
| 820 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
| 821 |
kernResult = KERN_SUCCESS; |
| 822 |
} |
| 823 |
CFRelease( bsdPathAsCFString ); |
| 824 |
} |
| 825 |
IOObjectRelease( nextMedia ); |
| 826 |
} |
| 827 |
|
| 828 |
return kernResult;
|
| 829 |
} |
| 830 |
|
| 831 |
#endif
|
| 832 |
|
| 833 |
static int hdev_probe_device(const char *filename) |
| 834 |
{
|
| 835 |
struct stat st;
|
| 836 |
|
| 837 |
/* allow a dedicated CD-ROM driver to match with a higher priority */
|
| 838 |
if (strstart(filename, "/dev/cdrom", NULL)) |
| 839 |
return 50; |
| 840 |
|
| 841 |
if (stat(filename, &st) >= 0 && |
| 842 |
(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
|
| 843 |
return 100; |
| 844 |
} |
| 845 |
|
| 846 |
return 0; |
| 847 |
} |
| 848 |
|
| 849 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
| 850 |
{
|
| 851 |
BDRVRawState *s = bs->opaque; |
| 852 |
|
| 853 |
#if defined(__APPLE__) && defined(__MACH__)
|
| 854 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
| 855 |
kern_return_t kernResult; |
| 856 |
io_iterator_t mediaIterator; |
| 857 |
char bsdPath[ MAXPATHLEN ];
|
| 858 |
int fd;
|
| 859 |
|
| 860 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
| 861 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
| 862 |
|
| 863 |
if ( bsdPath[ 0 ] != '\0' ) { |
| 864 |
strcat(bsdPath,"s0");
|
| 865 |
/* some CDs don't have a partition 0 */
|
| 866 |
fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
| 867 |
if (fd < 0) { |
| 868 |
bsdPath[strlen(bsdPath)-1] = '1'; |
| 869 |
} else {
|
| 870 |
qemu_close(fd); |
| 871 |
} |
| 872 |
filename = bsdPath; |
| 873 |
} |
| 874 |
|
| 875 |
if ( mediaIterator )
|
| 876 |
IOObjectRelease( mediaIterator ); |
| 877 |
} |
| 878 |
#endif
|
| 879 |
|
| 880 |
s->type = FTYPE_FILE; |
| 881 |
#if defined(__linux__)
|
| 882 |
{
|
| 883 |
char resolved_path[ MAXPATHLEN ], *temp;
|
| 884 |
|
| 885 |
temp = realpath(filename, resolved_path); |
| 886 |
if (temp && strstart(temp, "/dev/sg", NULL)) { |
| 887 |
bs->sg = 1;
|
| 888 |
} |
| 889 |
} |
| 890 |
#endif
|
| 891 |
|
| 892 |
return raw_open_common(bs, filename, flags, 0); |
| 893 |
} |
| 894 |
|
| 895 |
#if defined(__linux__)
|
| 896 |
/* Note: we do not have a reliable method to detect if the floppy is
|
| 897 |
present. The current method is to try to open the floppy at every
|
| 898 |
I/O and to keep it opened during a few hundreds of ms. */
|
| 899 |
static int fd_open(BlockDriverState *bs) |
| 900 |
{
|
| 901 |
BDRVRawState *s = bs->opaque; |
| 902 |
int last_media_present;
|
| 903 |
|
| 904 |
if (s->type != FTYPE_FD)
|
| 905 |
return 0; |
| 906 |
last_media_present = (s->fd >= 0);
|
| 907 |
if (s->fd >= 0 && |
| 908 |
(get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
|
| 909 |
qemu_close(s->fd); |
| 910 |
s->fd = -1;
|
| 911 |
#ifdef DEBUG_FLOPPY
|
| 912 |
printf("Floppy closed\n");
|
| 913 |
#endif
|
| 914 |
} |
| 915 |
if (s->fd < 0) { |
| 916 |
if (s->fd_got_error &&
|
| 917 |
(get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) {
|
| 918 |
#ifdef DEBUG_FLOPPY
|
| 919 |
printf("No floppy (open delayed)\n");
|
| 920 |
#endif
|
| 921 |
return -EIO;
|
| 922 |
} |
| 923 |
s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK); |
| 924 |
if (s->fd < 0) { |
| 925 |
s->fd_error_time = get_clock(); |
| 926 |
s->fd_got_error = 1;
|
| 927 |
if (last_media_present)
|
| 928 |
s->fd_media_changed = 1;
|
| 929 |
#ifdef DEBUG_FLOPPY
|
| 930 |
printf("No floppy\n");
|
| 931 |
#endif
|
| 932 |
return -EIO;
|
| 933 |
} |
| 934 |
#ifdef DEBUG_FLOPPY
|
| 935 |
printf("Floppy opened\n");
|
| 936 |
#endif
|
| 937 |
} |
| 938 |
if (!last_media_present)
|
| 939 |
s->fd_media_changed = 1;
|
| 940 |
s->fd_open_time = get_clock(); |
| 941 |
s->fd_got_error = 0;
|
| 942 |
return 0; |
| 943 |
} |
| 944 |
|
| 945 |
static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
| 946 |
{
|
| 947 |
BDRVRawState *s = bs->opaque; |
| 948 |
|
| 949 |
return ioctl(s->fd, req, buf);
|
| 950 |
} |
| 951 |
|
| 952 |
static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
|
| 953 |
unsigned long int req, void *buf, |
| 954 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 955 |
{
|
| 956 |
BDRVRawState *s = bs->opaque; |
| 957 |
|
| 958 |
if (fd_open(bs) < 0) |
| 959 |
return NULL; |
| 960 |
return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
|
| 961 |
} |
| 962 |
|
| 963 |
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 964 |
static int fd_open(BlockDriverState *bs) |
| 965 |
{
|
| 966 |
BDRVRawState *s = bs->opaque; |
| 967 |
|
| 968 |
/* this is just to ensure s->fd is sane (its called by io ops) */
|
| 969 |
if (s->fd >= 0) |
| 970 |
return 0; |
| 971 |
return -EIO;
|
| 972 |
} |
| 973 |
#else /* !linux && !FreeBSD */ |
| 974 |
|
| 975 |
static int fd_open(BlockDriverState *bs) |
| 976 |
{
|
| 977 |
return 0; |
| 978 |
} |
| 979 |
|
| 980 |
#endif /* !linux && !FreeBSD */ |
| 981 |
|
| 982 |
static int hdev_create(const char *filename, QEMUOptionParameter *options) |
| 983 |
{
|
| 984 |
int fd;
|
| 985 |
int ret = 0; |
| 986 |
struct stat stat_buf;
|
| 987 |
int64_t total_size = 0;
|
| 988 |
|
| 989 |
/* Read out options */
|
| 990 |
while (options && options->name) {
|
| 991 |
if (!strcmp(options->name, "size")) { |
| 992 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
| 993 |
} |
| 994 |
options++; |
| 995 |
} |
| 996 |
|
| 997 |
fd = qemu_open(filename, O_WRONLY | O_BINARY); |
| 998 |
if (fd < 0) |
| 999 |
return -errno;
|
| 1000 |
|
| 1001 |
if (fstat(fd, &stat_buf) < 0) |
| 1002 |
ret = -errno; |
| 1003 |
else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
| 1004 |
ret = -ENODEV; |
| 1005 |
else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) |
| 1006 |
ret = -ENOSPC; |
| 1007 |
|
| 1008 |
qemu_close(fd); |
| 1009 |
return ret;
|
| 1010 |
} |
| 1011 |
|
| 1012 |
static int hdev_has_zero_init(BlockDriverState *bs) |
| 1013 |
{
|
| 1014 |
return 0; |
| 1015 |
} |
| 1016 |
|
| 1017 |
static BlockDriver bdrv_host_device = {
|
| 1018 |
.format_name = "host_device",
|
| 1019 |
.protocol_name = "host_device",
|
| 1020 |
.instance_size = sizeof(BDRVRawState),
|
| 1021 |
.bdrv_probe_device = hdev_probe_device, |
| 1022 |
.bdrv_file_open = hdev_open, |
| 1023 |
.bdrv_close = raw_close, |
| 1024 |
.bdrv_create = hdev_create, |
| 1025 |
.create_options = raw_create_options, |
| 1026 |
.bdrv_has_zero_init = hdev_has_zero_init, |
| 1027 |
|
| 1028 |
.bdrv_aio_readv = raw_aio_readv, |
| 1029 |
.bdrv_aio_writev = raw_aio_writev, |
| 1030 |
.bdrv_aio_flush = raw_aio_flush, |
| 1031 |
|
| 1032 |
.bdrv_truncate = raw_truncate, |
| 1033 |
.bdrv_getlength = raw_getlength, |
| 1034 |
.bdrv_get_allocated_file_size |
| 1035 |
= raw_get_allocated_file_size, |
| 1036 |
|
| 1037 |
/* generic scsi device */
|
| 1038 |
#ifdef __linux__
|
| 1039 |
.bdrv_ioctl = hdev_ioctl, |
| 1040 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
| 1041 |
#endif
|
| 1042 |
}; |
| 1043 |
|
| 1044 |
#ifdef __linux__
|
| 1045 |
static int floppy_open(BlockDriverState *bs, const char *filename, int flags) |
| 1046 |
{
|
| 1047 |
BDRVRawState *s = bs->opaque; |
| 1048 |
int ret;
|
| 1049 |
|
| 1050 |
s->type = FTYPE_FD; |
| 1051 |
|
| 1052 |
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
|
| 1053 |
ret = raw_open_common(bs, filename, flags, O_NONBLOCK); |
| 1054 |
if (ret)
|
| 1055 |
return ret;
|
| 1056 |
|
| 1057 |
/* close fd so that we can reopen it as needed */
|
| 1058 |
qemu_close(s->fd); |
| 1059 |
s->fd = -1;
|
| 1060 |
s->fd_media_changed = 1;
|
| 1061 |
|
| 1062 |
return 0; |
| 1063 |
} |
| 1064 |
|
| 1065 |
static int floppy_probe_device(const char *filename) |
| 1066 |
{
|
| 1067 |
int fd, ret;
|
| 1068 |
int prio = 0; |
| 1069 |
struct floppy_struct fdparam;
|
| 1070 |
struct stat st;
|
| 1071 |
|
| 1072 |
if (strstart(filename, "/dev/fd", NULL) && |
| 1073 |
!strstart(filename, "/dev/fdset/", NULL)) { |
| 1074 |
prio = 50;
|
| 1075 |
} |
| 1076 |
|
| 1077 |
fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
| 1078 |
if (fd < 0) { |
| 1079 |
goto out;
|
| 1080 |
} |
| 1081 |
ret = fstat(fd, &st); |
| 1082 |
if (ret == -1 || !S_ISBLK(st.st_mode)) { |
| 1083 |
goto outc;
|
| 1084 |
} |
| 1085 |
|
| 1086 |
/* Attempt to detect via a floppy specific ioctl */
|
| 1087 |
ret = ioctl(fd, FDGETPRM, &fdparam); |
| 1088 |
if (ret >= 0) |
| 1089 |
prio = 100;
|
| 1090 |
|
| 1091 |
outc:
|
| 1092 |
qemu_close(fd); |
| 1093 |
out:
|
| 1094 |
return prio;
|
| 1095 |
} |
| 1096 |
|
| 1097 |
|
| 1098 |
static int floppy_is_inserted(BlockDriverState *bs) |
| 1099 |
{
|
| 1100 |
return fd_open(bs) >= 0; |
| 1101 |
} |
| 1102 |
|
| 1103 |
static int floppy_media_changed(BlockDriverState *bs) |
| 1104 |
{
|
| 1105 |
BDRVRawState *s = bs->opaque; |
| 1106 |
int ret;
|
| 1107 |
|
| 1108 |
/*
|
| 1109 |
* XXX: we do not have a true media changed indication.
|
| 1110 |
* It does not work if the floppy is changed without trying to read it.
|
| 1111 |
*/
|
| 1112 |
fd_open(bs); |
| 1113 |
ret = s->fd_media_changed; |
| 1114 |
s->fd_media_changed = 0;
|
| 1115 |
#ifdef DEBUG_FLOPPY
|
| 1116 |
printf("Floppy changed=%d\n", ret);
|
| 1117 |
#endif
|
| 1118 |
return ret;
|
| 1119 |
} |
| 1120 |
|
| 1121 |
static void floppy_eject(BlockDriverState *bs, bool eject_flag) |
| 1122 |
{
|
| 1123 |
BDRVRawState *s = bs->opaque; |
| 1124 |
int fd;
|
| 1125 |
|
| 1126 |
if (s->fd >= 0) { |
| 1127 |
qemu_close(s->fd); |
| 1128 |
s->fd = -1;
|
| 1129 |
} |
| 1130 |
fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK); |
| 1131 |
if (fd >= 0) { |
| 1132 |
if (ioctl(fd, FDEJECT, 0) < 0) |
| 1133 |
perror("FDEJECT");
|
| 1134 |
qemu_close(fd); |
| 1135 |
} |
| 1136 |
} |
| 1137 |
|
| 1138 |
static BlockDriver bdrv_host_floppy = {
|
| 1139 |
.format_name = "host_floppy",
|
| 1140 |
.protocol_name = "host_floppy",
|
| 1141 |
.instance_size = sizeof(BDRVRawState),
|
| 1142 |
.bdrv_probe_device = floppy_probe_device, |
| 1143 |
.bdrv_file_open = floppy_open, |
| 1144 |
.bdrv_close = raw_close, |
| 1145 |
.bdrv_create = hdev_create, |
| 1146 |
.create_options = raw_create_options, |
| 1147 |
.bdrv_has_zero_init = hdev_has_zero_init, |
| 1148 |
|
| 1149 |
.bdrv_aio_readv = raw_aio_readv, |
| 1150 |
.bdrv_aio_writev = raw_aio_writev, |
| 1151 |
.bdrv_aio_flush = raw_aio_flush, |
| 1152 |
|
| 1153 |
.bdrv_truncate = raw_truncate, |
| 1154 |
.bdrv_getlength = raw_getlength, |
| 1155 |
.bdrv_get_allocated_file_size |
| 1156 |
= raw_get_allocated_file_size, |
| 1157 |
|
| 1158 |
/* removable device support */
|
| 1159 |
.bdrv_is_inserted = floppy_is_inserted, |
| 1160 |
.bdrv_media_changed = floppy_media_changed, |
| 1161 |
.bdrv_eject = floppy_eject, |
| 1162 |
}; |
| 1163 |
|
| 1164 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
| 1165 |
{
|
| 1166 |
BDRVRawState *s = bs->opaque; |
| 1167 |
|
| 1168 |
s->type = FTYPE_CD; |
| 1169 |
|
| 1170 |
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
|
| 1171 |
return raw_open_common(bs, filename, flags, O_NONBLOCK);
|
| 1172 |
} |
| 1173 |
|
| 1174 |
static int cdrom_probe_device(const char *filename) |
| 1175 |
{
|
| 1176 |
int fd, ret;
|
| 1177 |
int prio = 0; |
| 1178 |
struct stat st;
|
| 1179 |
|
| 1180 |
fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
| 1181 |
if (fd < 0) { |
| 1182 |
goto out;
|
| 1183 |
} |
| 1184 |
ret = fstat(fd, &st); |
| 1185 |
if (ret == -1 || !S_ISBLK(st.st_mode)) { |
| 1186 |
goto outc;
|
| 1187 |
} |
| 1188 |
|
| 1189 |
/* Attempt to detect via a CDROM specific ioctl */
|
| 1190 |
ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
| 1191 |
if (ret >= 0) |
| 1192 |
prio = 100;
|
| 1193 |
|
| 1194 |
outc:
|
| 1195 |
qemu_close(fd); |
| 1196 |
out:
|
| 1197 |
return prio;
|
| 1198 |
} |
| 1199 |
|
| 1200 |
static int cdrom_is_inserted(BlockDriverState *bs) |
| 1201 |
{
|
| 1202 |
BDRVRawState *s = bs->opaque; |
| 1203 |
int ret;
|
| 1204 |
|
| 1205 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
| 1206 |
if (ret == CDS_DISC_OK)
|
| 1207 |
return 1; |
| 1208 |
return 0; |
| 1209 |
} |
| 1210 |
|
| 1211 |
static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
| 1212 |
{
|
| 1213 |
BDRVRawState *s = bs->opaque; |
| 1214 |
|
| 1215 |
if (eject_flag) {
|
| 1216 |
if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
| 1217 |
perror("CDROMEJECT");
|
| 1218 |
} else {
|
| 1219 |
if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
| 1220 |
perror("CDROMEJECT");
|
| 1221 |
} |
| 1222 |
} |
| 1223 |
|
| 1224 |
static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
| 1225 |
{
|
| 1226 |
BDRVRawState *s = bs->opaque; |
| 1227 |
|
| 1228 |
if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
| 1229 |
/*
|
| 1230 |
* Note: an error can happen if the distribution automatically
|
| 1231 |
* mounts the CD-ROM
|
| 1232 |
*/
|
| 1233 |
/* perror("CDROM_LOCKDOOR"); */
|
| 1234 |
} |
| 1235 |
} |
| 1236 |
|
| 1237 |
static BlockDriver bdrv_host_cdrom = {
|
| 1238 |
.format_name = "host_cdrom",
|
| 1239 |
.protocol_name = "host_cdrom",
|
| 1240 |
.instance_size = sizeof(BDRVRawState),
|
| 1241 |
.bdrv_probe_device = cdrom_probe_device, |
| 1242 |
.bdrv_file_open = cdrom_open, |
| 1243 |
.bdrv_close = raw_close, |
| 1244 |
.bdrv_create = hdev_create, |
| 1245 |
.create_options = raw_create_options, |
| 1246 |
.bdrv_has_zero_init = hdev_has_zero_init, |
| 1247 |
|
| 1248 |
.bdrv_aio_readv = raw_aio_readv, |
| 1249 |
.bdrv_aio_writev = raw_aio_writev, |
| 1250 |
.bdrv_aio_flush = raw_aio_flush, |
| 1251 |
|
| 1252 |
.bdrv_truncate = raw_truncate, |
| 1253 |
.bdrv_getlength = raw_getlength, |
| 1254 |
.bdrv_get_allocated_file_size |
| 1255 |
= raw_get_allocated_file_size, |
| 1256 |
|
| 1257 |
/* removable device support */
|
| 1258 |
.bdrv_is_inserted = cdrom_is_inserted, |
| 1259 |
.bdrv_eject = cdrom_eject, |
| 1260 |
.bdrv_lock_medium = cdrom_lock_medium, |
| 1261 |
|
| 1262 |
/* generic scsi device */
|
| 1263 |
.bdrv_ioctl = hdev_ioctl, |
| 1264 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
| 1265 |
}; |
| 1266 |
#endif /* __linux__ */ |
| 1267 |
|
| 1268 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 1269 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
| 1270 |
{
|
| 1271 |
BDRVRawState *s = bs->opaque; |
| 1272 |
int ret;
|
| 1273 |
|
| 1274 |
s->type = FTYPE_CD; |
| 1275 |
|
| 1276 |
ret = raw_open_common(bs, filename, flags, 0);
|
| 1277 |
if (ret)
|
| 1278 |
return ret;
|
| 1279 |
|
| 1280 |
/* make sure the door isn't locked at this time */
|
| 1281 |
ioctl(s->fd, CDIOCALLOW); |
| 1282 |
return 0; |
| 1283 |
} |
| 1284 |
|
| 1285 |
static int cdrom_probe_device(const char *filename) |
| 1286 |
{
|
| 1287 |
if (strstart(filename, "/dev/cd", NULL) || |
| 1288 |
strstart(filename, "/dev/acd", NULL)) |
| 1289 |
return 100; |
| 1290 |
return 0; |
| 1291 |
} |
| 1292 |
|
| 1293 |
static int cdrom_reopen(BlockDriverState *bs) |
| 1294 |
{
|
| 1295 |
BDRVRawState *s = bs->opaque; |
| 1296 |
int fd;
|
| 1297 |
|
| 1298 |
/*
|
| 1299 |
* Force reread of possibly changed/newly loaded disc,
|
| 1300 |
* FreeBSD seems to not notice sometimes...
|
| 1301 |
*/
|
| 1302 |
if (s->fd >= 0) |
| 1303 |
qemu_close(s->fd); |
| 1304 |
fd = qemu_open(bs->filename, s->open_flags, 0644);
|
| 1305 |
if (fd < 0) { |
| 1306 |
s->fd = -1;
|
| 1307 |
return -EIO;
|
| 1308 |
} |
| 1309 |
s->fd = fd; |
| 1310 |
|
| 1311 |
/* make sure the door isn't locked at this time */
|
| 1312 |
ioctl(s->fd, CDIOCALLOW); |
| 1313 |
return 0; |
| 1314 |
} |
| 1315 |
|
| 1316 |
static int cdrom_is_inserted(BlockDriverState *bs) |
| 1317 |
{
|
| 1318 |
return raw_getlength(bs) > 0; |
| 1319 |
} |
| 1320 |
|
| 1321 |
static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
| 1322 |
{
|
| 1323 |
BDRVRawState *s = bs->opaque; |
| 1324 |
|
| 1325 |
if (s->fd < 0) |
| 1326 |
return;
|
| 1327 |
|
| 1328 |
(void) ioctl(s->fd, CDIOCALLOW);
|
| 1329 |
|
| 1330 |
if (eject_flag) {
|
| 1331 |
if (ioctl(s->fd, CDIOCEJECT) < 0) |
| 1332 |
perror("CDIOCEJECT");
|
| 1333 |
} else {
|
| 1334 |
if (ioctl(s->fd, CDIOCCLOSE) < 0) |
| 1335 |
perror("CDIOCCLOSE");
|
| 1336 |
} |
| 1337 |
|
| 1338 |
cdrom_reopen(bs); |
| 1339 |
} |
| 1340 |
|
| 1341 |
static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
| 1342 |
{
|
| 1343 |
BDRVRawState *s = bs->opaque; |
| 1344 |
|
| 1345 |
if (s->fd < 0) |
| 1346 |
return;
|
| 1347 |
if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
| 1348 |
/*
|
| 1349 |
* Note: an error can happen if the distribution automatically
|
| 1350 |
* mounts the CD-ROM
|
| 1351 |
*/
|
| 1352 |
/* perror("CDROM_LOCKDOOR"); */
|
| 1353 |
} |
| 1354 |
} |
| 1355 |
|
| 1356 |
static BlockDriver bdrv_host_cdrom = {
|
| 1357 |
.format_name = "host_cdrom",
|
| 1358 |
.protocol_name = "host_cdrom",
|
| 1359 |
.instance_size = sizeof(BDRVRawState),
|
| 1360 |
.bdrv_probe_device = cdrom_probe_device, |
| 1361 |
.bdrv_file_open = cdrom_open, |
| 1362 |
.bdrv_close = raw_close, |
| 1363 |
.bdrv_create = hdev_create, |
| 1364 |
.create_options = raw_create_options, |
| 1365 |
.bdrv_has_zero_init = hdev_has_zero_init, |
| 1366 |
|
| 1367 |
.bdrv_aio_readv = raw_aio_readv, |
| 1368 |
.bdrv_aio_writev = raw_aio_writev, |
| 1369 |
.bdrv_aio_flush = raw_aio_flush, |
| 1370 |
|
| 1371 |
.bdrv_truncate = raw_truncate, |
| 1372 |
.bdrv_getlength = raw_getlength, |
| 1373 |
.bdrv_get_allocated_file_size |
| 1374 |
= raw_get_allocated_file_size, |
| 1375 |
|
| 1376 |
/* removable device support */
|
| 1377 |
.bdrv_is_inserted = cdrom_is_inserted, |
| 1378 |
.bdrv_eject = cdrom_eject, |
| 1379 |
.bdrv_lock_medium = cdrom_lock_medium, |
| 1380 |
}; |
| 1381 |
#endif /* __FreeBSD__ */ |
| 1382 |
|
| 1383 |
static void bdrv_file_init(void) |
| 1384 |
{
|
| 1385 |
/*
|
| 1386 |
* Register all the drivers. Note that order is important, the driver
|
| 1387 |
* registered last will get probed first.
|
| 1388 |
*/
|
| 1389 |
bdrv_register(&bdrv_file); |
| 1390 |
bdrv_register(&bdrv_host_device); |
| 1391 |
#ifdef __linux__
|
| 1392 |
bdrv_register(&bdrv_host_floppy); |
| 1393 |
bdrv_register(&bdrv_host_cdrom); |
| 1394 |
#endif
|
| 1395 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 1396 |
bdrv_register(&bdrv_host_cdrom); |
| 1397 |
#endif
|
| 1398 |
} |
| 1399 |
|
| 1400 |
block_init(bdrv_file_init); |