root / block / raw-posix.c @ 4a1d5e1f
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/*
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* Block driver for RAW files (posix)
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h" |
25 |
#include "qemu-timer.h" |
26 |
#include "qemu-char.h" |
27 |
#include "qemu-log.h" |
28 |
#include "block_int.h" |
29 |
#include "module.h" |
30 |
#include "block/raw-posix-aio.h" |
31 |
|
32 |
#ifdef CONFIG_COCOA
|
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#include <paths.h> |
34 |
#include <sys/param.h> |
35 |
#include <IOKit/IOKitLib.h> |
36 |
#include <IOKit/IOBSD.h> |
37 |
#include <IOKit/storage/IOMediaBSDClient.h> |
38 |
#include <IOKit/storage/IOMedia.h> |
39 |
#include <IOKit/storage/IOCDMedia.h> |
40 |
//#include <IOKit/storage/IOCDTypes.h>
|
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#include <CoreFoundation/CoreFoundation.h> |
42 |
#endif
|
43 |
|
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 |
#endif
|
56 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
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#include <sys/disk.h> |
58 |
#include <sys/cdio.h> |
59 |
#endif
|
60 |
|
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#ifdef __OpenBSD__
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#include <sys/ioctl.h> |
63 |
#include <sys/disklabel.h> |
64 |
#include <sys/dkio.h> |
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#endif
|
66 |
|
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#ifdef __NetBSD__
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#include <sys/ioctl.h> |
69 |
#include <sys/disklabel.h> |
70 |
#include <sys/dkio.h> |
71 |
#include <sys/disk.h> |
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#endif
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73 |
|
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#ifdef __DragonFly__
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#include <sys/ioctl.h> |
76 |
#include <sys/diskslice.h> |
77 |
#endif
|
78 |
|
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#ifdef CONFIG_XFS
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#include <xfs/xfs.h> |
81 |
#endif
|
82 |
|
83 |
//#define DEBUG_FLOPPY
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84 |
|
85 |
//#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) |
89 |
#else
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#define DEBUG_BLOCK_PRINT(formatCstr, ...)
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#endif
|
92 |
|
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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 |
110 |
|
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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) |
114 |
|
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#define MAX_BLOCKSIZE 4096 |
116 |
|
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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; |
124 |
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; |
133 |
unsigned aligned_buf_size;
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#ifdef CONFIG_XFS
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bool is_xfs : 1; |
136 |
#endif
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} BDRVRawState; |
138 |
|
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static int fd_open(BlockDriverState *bs); |
140 |
static int64_t raw_getlength(BlockDriverState *bs);
|
141 |
|
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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static int cdrom_reopen(BlockDriverState *bs); |
144 |
#endif
|
145 |
|
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#if defined(__NetBSD__)
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static int raw_normalize_devicepath(const char **filename) |
148 |
{ |
149 |
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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} |
160 |
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if (!S_ISBLK(sb.st_mode)) {
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return 0; |
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} |
164 |
|
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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); |
170 |
} |
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fprintf(stderr, "%s is a block device", fname);
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*filename = namebuf; |
173 |
fprintf(stderr, ", using %s\n", *filename);
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return 0; |
176 |
} |
177 |
#else
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static int raw_normalize_devicepath(const char **filename) |
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{ |
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return 0; |
181 |
} |
182 |
#endif
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183 |
|
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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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ret = raw_normalize_devicepath(&filename); |
191 |
if (ret != 0) { |
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return ret;
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} |
194 |
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s->open_flags = open_flags | O_BINARY; |
196 |
s->open_flags &= ~O_ACCMODE; |
197 |
if (bdrv_flags & BDRV_O_RDWR) {
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s->open_flags |= O_RDWR; |
199 |
} else {
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s->open_flags |= O_RDONLY; |
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} |
202 |
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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; |
207 |
if (!(bdrv_flags & BDRV_O_CACHE_WB))
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s->open_flags |= O_DSYNC; |
209 |
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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; |
214 |
if (ret == -EROFS)
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ret = -EACCES; |
216 |
return ret;
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} |
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s->fd = fd; |
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s->aligned_buf = NULL;
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if ((bdrv_flags & BDRV_O_NOCACHE)) {
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/*
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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); |
228 |
if (s->aligned_buf == NULL) { |
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goto out_close;
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} |
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} |
232 |
|
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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)) { |
236 |
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/* We're falling back to POSIX AIO in some cases */
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paio_init(); |
239 |
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s->aio_ctx = laio_init(); |
241 |
if (!s->aio_ctx) {
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goto out_free_buf;
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} |
244 |
s->use_aio = 1;
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} else
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#endif
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{ |
248 |
if (paio_init() < 0) { |
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goto out_free_buf;
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} |
251 |
#ifdef CONFIG_LINUX_AIO
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s->use_aio = 0;
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#endif
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} |
255 |
|
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#ifdef CONFIG_XFS
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if (platform_test_xfs_fd(s->fd)) {
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s->is_xfs = 1;
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} |
260 |
#endif
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|
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return 0; |
263 |
|
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out_free_buf:
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qemu_vfree(s->aligned_buf); |
266 |
out_close:
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close(fd); |
268 |
return -errno;
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} |
270 |
|
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static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
272 |
{ |
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BDRVRawState *s = bs->opaque; |
274 |
|
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s->type = FTYPE_FILE; |
276 |
return raw_open_common(bs, filename, flags, 0); |
277 |
} |
278 |
|
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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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282 |
unsigned int sectorsize = 512;
|
283 |
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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287 |
#endif
|
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#ifdef CONFIG_COCOA
|
289 |
uint32_t blockSize = 512;
|
290 |
if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
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291 |
bufsize = blockSize;
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292 |
}
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293 |
#endif
|
294 |
*/
|
295 |
|
296 |
/*
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297 |
* offset and count are in bytes, but must be multiples of 512 for files
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298 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
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299 |
*
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300 |
* This function may be called without alignment if the caller ensures
|
301 |
* that O_DIRECT is not in effect.
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302 |
*/
|
303 |
static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, |
304 |
uint8_t *buf, int count)
|
305 |
{ |
306 |
BDRVRawState *s = bs->opaque; |
307 |
int ret;
|
308 |
|
309 |
ret = fd_open(bs); |
310 |
if (ret < 0) |
311 |
return ret;
|
312 |
|
313 |
ret = pread(s->fd, buf, count, offset); |
314 |
if (ret == count)
|
315 |
return ret;
|
316 |
|
317 |
/* Allow reads beyond the end (needed for pwrite) */
|
318 |
if ((ret == 0) && bs->growable) { |
319 |
int64_t size = raw_getlength(bs); |
320 |
if (offset >= size) {
|
321 |
memset(buf, 0, count);
|
322 |
return count;
|
323 |
} |
324 |
} |
325 |
|
326 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
327 |
"] read failed %d : %d = %s\n",
|
328 |
s->fd, bs->filename, offset, buf, count, |
329 |
bs->total_sectors, ret, errno, strerror(errno)); |
330 |
|
331 |
/* Try harder for CDrom. */
|
332 |
if (s->type != FTYPE_FILE) {
|
333 |
ret = pread(s->fd, buf, count, offset); |
334 |
if (ret == count)
|
335 |
return ret;
|
336 |
ret = pread(s->fd, buf, count, offset); |
337 |
if (ret == count)
|
338 |
return ret;
|
339 |
|
340 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
341 |
"] retry read failed %d : %d = %s\n",
|
342 |
s->fd, bs->filename, offset, buf, count, |
343 |
bs->total_sectors, ret, errno, strerror(errno)); |
344 |
} |
345 |
|
346 |
return (ret < 0) ? -errno : ret; |
347 |
} |
348 |
|
349 |
/*
|
350 |
* offset and count are in bytes, but must be multiples of the sector size
|
351 |
* for files opened with O_DIRECT. buf must be aligned to sector size bytes
|
352 |
* then.
|
353 |
*
|
354 |
* This function may be called without alignment if the caller ensures
|
355 |
* that O_DIRECT is not in effect.
|
356 |
*/
|
357 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
358 |
const uint8_t *buf, int count) |
359 |
{ |
360 |
BDRVRawState *s = bs->opaque; |
361 |
int ret;
|
362 |
|
363 |
ret = fd_open(bs); |
364 |
if (ret < 0) |
365 |
return -errno;
|
366 |
|
367 |
ret = pwrite(s->fd, buf, count, offset); |
368 |
if (ret == count)
|
369 |
return ret;
|
370 |
|
371 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
372 |
"] write failed %d : %d = %s\n",
|
373 |
s->fd, bs->filename, offset, buf, count, |
374 |
bs->total_sectors, ret, errno, strerror(errno)); |
375 |
|
376 |
return (ret < 0) ? -errno : ret; |
377 |
} |
378 |
|
379 |
|
380 |
/*
|
381 |
* offset and count are in bytes and possibly not aligned. For files opened
|
382 |
* with O_DIRECT, necessary alignments are ensured before calling
|
383 |
* raw_pread_aligned to do the actual read.
|
384 |
*/
|
385 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
386 |
uint8_t *buf, int count)
|
387 |
{ |
388 |
BDRVRawState *s = bs->opaque; |
389 |
unsigned sector_mask = bs->buffer_alignment - 1; |
390 |
int size, ret, shift, sum;
|
391 |
|
392 |
sum = 0;
|
393 |
|
394 |
if (s->aligned_buf != NULL) { |
395 |
|
396 |
if (offset & sector_mask) {
|
397 |
/* align offset on a sector size bytes boundary */
|
398 |
|
399 |
shift = offset & sector_mask; |
400 |
size = (shift + count + sector_mask) & ~sector_mask; |
401 |
if (size > s->aligned_buf_size)
|
402 |
size = s->aligned_buf_size; |
403 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
404 |
if (ret < 0) |
405 |
return ret;
|
406 |
|
407 |
size = bs->buffer_alignment - shift; |
408 |
if (size > count)
|
409 |
size = count; |
410 |
memcpy(buf, s->aligned_buf + shift, size); |
411 |
|
412 |
buf += size; |
413 |
offset += size; |
414 |
count -= size; |
415 |
sum += size; |
416 |
|
417 |
if (count == 0) |
418 |
return sum;
|
419 |
} |
420 |
if (count & sector_mask || (uintptr_t) buf & sector_mask) {
|
421 |
|
422 |
/* read on aligned buffer */
|
423 |
|
424 |
while (count) {
|
425 |
|
426 |
size = (count + sector_mask) & ~sector_mask; |
427 |
if (size > s->aligned_buf_size)
|
428 |
size = s->aligned_buf_size; |
429 |
|
430 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
431 |
if (ret < 0) { |
432 |
return ret;
|
433 |
} else if (ret == 0) { |
434 |
fprintf(stderr, "raw_pread: read beyond end of file\n");
|
435 |
abort(); |
436 |
} |
437 |
|
438 |
size = ret; |
439 |
if (size > count)
|
440 |
size = count; |
441 |
|
442 |
memcpy(buf, s->aligned_buf, size); |
443 |
|
444 |
buf += size; |
445 |
offset += size; |
446 |
count -= size; |
447 |
sum += size; |
448 |
} |
449 |
|
450 |
return sum;
|
451 |
} |
452 |
} |
453 |
|
454 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
455 |
} |
456 |
|
457 |
static int raw_read(BlockDriverState *bs, int64_t sector_num, |
458 |
uint8_t *buf, int nb_sectors)
|
459 |
{ |
460 |
int ret;
|
461 |
|
462 |
ret = raw_pread(bs, sector_num * BDRV_SECTOR_SIZE, buf, |
463 |
nb_sectors * BDRV_SECTOR_SIZE); |
464 |
if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
|
465 |
ret = 0;
|
466 |
return ret;
|
467 |
} |
468 |
|
469 |
/*
|
470 |
* offset and count are in bytes and possibly not aligned. For files opened
|
471 |
* with O_DIRECT, necessary alignments are ensured before calling
|
472 |
* raw_pwrite_aligned to do the actual write.
|
473 |
*/
|
474 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
475 |
const uint8_t *buf, int count) |
476 |
{ |
477 |
BDRVRawState *s = bs->opaque; |
478 |
unsigned sector_mask = bs->buffer_alignment - 1; |
479 |
int size, ret, shift, sum;
|
480 |
|
481 |
sum = 0;
|
482 |
|
483 |
if (s->aligned_buf != NULL) { |
484 |
|
485 |
if (offset & sector_mask) {
|
486 |
/* align offset on a sector size bytes boundary */
|
487 |
shift = offset & sector_mask; |
488 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, |
489 |
bs->buffer_alignment); |
490 |
if (ret < 0) |
491 |
return ret;
|
492 |
|
493 |
size = bs->buffer_alignment - shift; |
494 |
if (size > count)
|
495 |
size = count; |
496 |
memcpy(s->aligned_buf + shift, buf, size); |
497 |
|
498 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, |
499 |
bs->buffer_alignment); |
500 |
if (ret < 0) |
501 |
return ret;
|
502 |
|
503 |
buf += size; |
504 |
offset += size; |
505 |
count -= size; |
506 |
sum += size; |
507 |
|
508 |
if (count == 0) |
509 |
return sum;
|
510 |
} |
511 |
if (count & sector_mask || (uintptr_t) buf & sector_mask) {
|
512 |
|
513 |
while ((size = (count & ~sector_mask)) != 0) { |
514 |
|
515 |
if (size > s->aligned_buf_size)
|
516 |
size = s->aligned_buf_size; |
517 |
|
518 |
memcpy(s->aligned_buf, buf, size); |
519 |
|
520 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
521 |
if (ret < 0) |
522 |
return ret;
|
523 |
|
524 |
buf += ret; |
525 |
offset += ret; |
526 |
count -= ret; |
527 |
sum += ret; |
528 |
} |
529 |
/* here, count < sector_size because (count & ~sector_mask) == 0 */
|
530 |
if (count) {
|
531 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, |
532 |
bs->buffer_alignment); |
533 |
if (ret < 0) |
534 |
return ret;
|
535 |
memcpy(s->aligned_buf, buf, count); |
536 |
|
537 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, |
538 |
bs->buffer_alignment); |
539 |
if (ret < 0) |
540 |
return ret;
|
541 |
if (count < ret)
|
542 |
ret = count; |
543 |
|
544 |
sum += ret; |
545 |
} |
546 |
return sum;
|
547 |
} |
548 |
} |
549 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
550 |
} |
551 |
|
552 |
static int raw_write(BlockDriverState *bs, int64_t sector_num, |
553 |
const uint8_t *buf, int nb_sectors) |
554 |
{ |
555 |
int ret;
|
556 |
ret = raw_pwrite(bs, sector_num * BDRV_SECTOR_SIZE, buf, |
557 |
nb_sectors * BDRV_SECTOR_SIZE); |
558 |
if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
|
559 |
ret = 0;
|
560 |
return ret;
|
561 |
} |
562 |
|
563 |
/*
|
564 |
* Check if all memory in this vector is sector aligned.
|
565 |
*/
|
566 |
static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov) |
567 |
{ |
568 |
int i;
|
569 |
|
570 |
for (i = 0; i < qiov->niov; i++) { |
571 |
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
|
572 |
return 0; |
573 |
} |
574 |
} |
575 |
|
576 |
return 1; |
577 |
} |
578 |
|
579 |
static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
|
580 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
581 |
BlockDriverCompletionFunc *cb, void *opaque, int type) |
582 |
{ |
583 |
BDRVRawState *s = bs->opaque; |
584 |
|
585 |
if (fd_open(bs) < 0) |
586 |
return NULL; |
587 |
|
588 |
/*
|
589 |
* If O_DIRECT is used the buffer needs to be aligned on a sector
|
590 |
* boundary. Check if this is the case or telll the low-level
|
591 |
* driver that it needs to copy the buffer.
|
592 |
*/
|
593 |
if (s->aligned_buf) {
|
594 |
if (!qiov_is_aligned(bs, qiov)) {
|
595 |
type |= QEMU_AIO_MISALIGNED; |
596 |
#ifdef CONFIG_LINUX_AIO
|
597 |
} else if (s->use_aio) { |
598 |
return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
|
599 |
nb_sectors, cb, opaque, type); |
600 |
#endif
|
601 |
} |
602 |
} |
603 |
|
604 |
return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
|
605 |
cb, opaque, type); |
606 |
} |
607 |
|
608 |
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
|
609 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
610 |
BlockDriverCompletionFunc *cb, void *opaque)
|
611 |
{ |
612 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
613 |
cb, opaque, QEMU_AIO_READ); |
614 |
} |
615 |
|
616 |
static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
|
617 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
618 |
BlockDriverCompletionFunc *cb, void *opaque)
|
619 |
{ |
620 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
621 |
cb, opaque, QEMU_AIO_WRITE); |
622 |
} |
623 |
|
624 |
static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
|
625 |
BlockDriverCompletionFunc *cb, void *opaque)
|
626 |
{ |
627 |
BDRVRawState *s = bs->opaque; |
628 |
|
629 |
if (fd_open(bs) < 0) |
630 |
return NULL; |
631 |
|
632 |
return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
633 |
} |
634 |
|
635 |
static void raw_close(BlockDriverState *bs) |
636 |
{ |
637 |
BDRVRawState *s = bs->opaque; |
638 |
if (s->fd >= 0) { |
639 |
close(s->fd); |
640 |
s->fd = -1;
|
641 |
if (s->aligned_buf != NULL) |
642 |
qemu_vfree(s->aligned_buf); |
643 |
} |
644 |
} |
645 |
|
646 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
647 |
{ |
648 |
BDRVRawState *s = bs->opaque; |
649 |
if (s->type != FTYPE_FILE)
|
650 |
return -ENOTSUP;
|
651 |
if (ftruncate(s->fd, offset) < 0) |
652 |
return -errno;
|
653 |
return 0; |
654 |
} |
655 |
|
656 |
#ifdef __OpenBSD__
|
657 |
static int64_t raw_getlength(BlockDriverState *bs)
|
658 |
{ |
659 |
BDRVRawState *s = bs->opaque; |
660 |
int fd = s->fd;
|
661 |
struct stat st;
|
662 |
|
663 |
if (fstat(fd, &st))
|
664 |
return -1; |
665 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
666 |
struct disklabel dl;
|
667 |
|
668 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
669 |
return -1; |
670 |
return (uint64_t)dl.d_secsize *
|
671 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
672 |
} else
|
673 |
return st.st_size;
|
674 |
} |
675 |
#elif defined(__NetBSD__)
|
676 |
static int64_t raw_getlength(BlockDriverState *bs)
|
677 |
{ |
678 |
BDRVRawState *s = bs->opaque; |
679 |
int fd = s->fd;
|
680 |
struct stat st;
|
681 |
|
682 |
if (fstat(fd, &st))
|
683 |
return -1; |
684 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
685 |
struct dkwedge_info dkw;
|
686 |
|
687 |
if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { |
688 |
return dkw.dkw_size * 512; |
689 |
} else {
|
690 |
struct disklabel dl;
|
691 |
|
692 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
693 |
return -1; |
694 |
return (uint64_t)dl.d_secsize *
|
695 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
696 |
} |
697 |
} else
|
698 |
return st.st_size;
|
699 |
} |
700 |
#elif defined(__sun__)
|
701 |
static int64_t raw_getlength(BlockDriverState *bs)
|
702 |
{ |
703 |
BDRVRawState *s = bs->opaque; |
704 |
struct dk_minfo minfo;
|
705 |
int ret;
|
706 |
|
707 |
ret = fd_open(bs); |
708 |
if (ret < 0) { |
709 |
return ret;
|
710 |
} |
711 |
|
712 |
/*
|
713 |
* Use the DKIOCGMEDIAINFO ioctl to read the size.
|
714 |
*/
|
715 |
ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); |
716 |
if (ret != -1) { |
717 |
return minfo.dki_lbsize * minfo.dki_capacity;
|
718 |
} |
719 |
|
720 |
/*
|
721 |
* There are reports that lseek on some devices fails, but
|
722 |
* irc discussion said that contingency on contingency was overkill.
|
723 |
*/
|
724 |
return lseek(s->fd, 0, SEEK_END); |
725 |
} |
726 |
#elif defined(CONFIG_BSD)
|
727 |
static int64_t raw_getlength(BlockDriverState *bs)
|
728 |
{ |
729 |
BDRVRawState *s = bs->opaque; |
730 |
int fd = s->fd;
|
731 |
int64_t size; |
732 |
struct stat sb;
|
733 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
734 |
int reopened = 0; |
735 |
#endif
|
736 |
int ret;
|
737 |
|
738 |
ret = fd_open(bs); |
739 |
if (ret < 0) |
740 |
return ret;
|
741 |
|
742 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
743 |
again:
|
744 |
#endif
|
745 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
746 |
#ifdef DIOCGMEDIASIZE
|
747 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
748 |
#elif defined(DIOCGPART)
|
749 |
{ |
750 |
struct partinfo pi;
|
751 |
if (ioctl(fd, DIOCGPART, &pi) == 0) |
752 |
size = pi.media_size; |
753 |
else
|
754 |
size = 0;
|
755 |
} |
756 |
if (size == 0) |
757 |
#endif
|
758 |
#ifdef CONFIG_COCOA
|
759 |
size = LONG_LONG_MAX; |
760 |
#else
|
761 |
size = lseek(fd, 0LL, SEEK_END);
|
762 |
#endif
|
763 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
764 |
switch(s->type) {
|
765 |
case FTYPE_CD:
|
766 |
/* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
|
767 |
if (size == 2048LL * (unsigned)-1) |
768 |
size = 0;
|
769 |
/* XXX no disc? maybe we need to reopen... */
|
770 |
if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
771 |
reopened = 1;
|
772 |
goto again;
|
773 |
} |
774 |
} |
775 |
#endif
|
776 |
} else {
|
777 |
size = lseek(fd, 0, SEEK_END);
|
778 |
} |
779 |
return size;
|
780 |
} |
781 |
#else
|
782 |
static int64_t raw_getlength(BlockDriverState *bs)
|
783 |
{ |
784 |
BDRVRawState *s = bs->opaque; |
785 |
int ret;
|
786 |
|
787 |
ret = fd_open(bs); |
788 |
if (ret < 0) { |
789 |
return ret;
|
790 |
} |
791 |
|
792 |
return lseek(s->fd, 0, SEEK_END); |
793 |
} |
794 |
#endif
|
795 |
|
796 |
static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
|
797 |
{ |
798 |
struct stat st;
|
799 |
BDRVRawState *s = bs->opaque; |
800 |
|
801 |
if (fstat(s->fd, &st) < 0) { |
802 |
return -errno;
|
803 |
} |
804 |
return (int64_t)st.st_blocks * 512; |
805 |
} |
806 |
|
807 |
static int raw_create(const char *filename, QEMUOptionParameter *options) |
808 |
{ |
809 |
int fd;
|
810 |
int result = 0; |
811 |
int64_t total_size = 0;
|
812 |
|
813 |
/* Read out options */
|
814 |
while (options && options->name) {
|
815 |
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
816 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
817 |
} |
818 |
options++; |
819 |
} |
820 |
|
821 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
822 |
0644);
|
823 |
if (fd < 0) { |
824 |
result = -errno; |
825 |
} else {
|
826 |
if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
827 |
result = -errno; |
828 |
} |
829 |
if (close(fd) != 0) { |
830 |
result = -errno; |
831 |
} |
832 |
} |
833 |
return result;
|
834 |
} |
835 |
|
836 |
static int raw_flush(BlockDriverState *bs) |
837 |
{ |
838 |
BDRVRawState *s = bs->opaque; |
839 |
return qemu_fdatasync(s->fd);
|
840 |
} |
841 |
|
842 |
#ifdef CONFIG_XFS
|
843 |
static int xfs_discard(BDRVRawState *s, int64_t sector_num, int nb_sectors) |
844 |
{ |
845 |
struct xfs_flock64 fl;
|
846 |
|
847 |
memset(&fl, 0, sizeof(fl)); |
848 |
fl.l_whence = SEEK_SET; |
849 |
fl.l_start = sector_num << 9;
|
850 |
fl.l_len = (int64_t)nb_sectors << 9;
|
851 |
|
852 |
if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { |
853 |
DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno));
|
854 |
return -errno;
|
855 |
} |
856 |
|
857 |
return 0; |
858 |
} |
859 |
#endif
|
860 |
|
861 |
static int raw_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors) |
862 |
{ |
863 |
#ifdef CONFIG_XFS
|
864 |
BDRVRawState *s = bs->opaque; |
865 |
|
866 |
if (s->is_xfs) {
|
867 |
return xfs_discard(s, sector_num, nb_sectors);
|
868 |
} |
869 |
#endif
|
870 |
|
871 |
return 0; |
872 |
} |
873 |
|
874 |
static QEMUOptionParameter raw_create_options[] = {
|
875 |
{ |
876 |
.name = BLOCK_OPT_SIZE, |
877 |
.type = OPT_SIZE, |
878 |
.help = "Virtual disk size"
|
879 |
}, |
880 |
{ NULL }
|
881 |
}; |
882 |
|
883 |
static BlockDriver bdrv_file = {
|
884 |
.format_name = "file",
|
885 |
.protocol_name = "file",
|
886 |
.instance_size = sizeof(BDRVRawState),
|
887 |
.bdrv_probe = NULL, /* no probe for protocols */ |
888 |
.bdrv_file_open = raw_open, |
889 |
.bdrv_read = raw_read, |
890 |
.bdrv_write = raw_write, |
891 |
.bdrv_close = raw_close, |
892 |
.bdrv_create = raw_create, |
893 |
.bdrv_flush = raw_flush, |
894 |
.bdrv_discard = raw_discard, |
895 |
|
896 |
.bdrv_aio_readv = raw_aio_readv, |
897 |
.bdrv_aio_writev = raw_aio_writev, |
898 |
.bdrv_aio_flush = raw_aio_flush, |
899 |
|
900 |
.bdrv_truncate = raw_truncate, |
901 |
.bdrv_getlength = raw_getlength, |
902 |
.bdrv_get_allocated_file_size |
903 |
= raw_get_allocated_file_size, |
904 |
|
905 |
.create_options = raw_create_options, |
906 |
}; |
907 |
|
908 |
/***********************************************/
|
909 |
/* host device */
|
910 |
|
911 |
#ifdef CONFIG_COCOA
|
912 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
913 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
914 |
|
915 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
916 |
{ |
917 |
kern_return_t kernResult; |
918 |
mach_port_t masterPort; |
919 |
CFMutableDictionaryRef classesToMatch; |
920 |
|
921 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
922 |
if ( KERN_SUCCESS != kernResult ) {
|
923 |
printf( "IOMasterPort returned %d\n", kernResult );
|
924 |
} |
925 |
|
926 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
927 |
if ( classesToMatch == NULL ) { |
928 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
929 |
} else {
|
930 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
931 |
} |
932 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
933 |
if ( KERN_SUCCESS != kernResult )
|
934 |
{ |
935 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
936 |
} |
937 |
|
938 |
return kernResult;
|
939 |
} |
940 |
|
941 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
942 |
{ |
943 |
io_object_t nextMedia; |
944 |
kern_return_t kernResult = KERN_FAILURE; |
945 |
*bsdPath = '\0';
|
946 |
nextMedia = IOIteratorNext( mediaIterator ); |
947 |
if ( nextMedia )
|
948 |
{ |
949 |
CFTypeRef bsdPathAsCFString; |
950 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
951 |
if ( bsdPathAsCFString ) {
|
952 |
size_t devPathLength; |
953 |
strcpy( bsdPath, _PATH_DEV ); |
954 |
strcat( bsdPath, "r" );
|
955 |
devPathLength = strlen( bsdPath ); |
956 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
957 |
kernResult = KERN_SUCCESS; |
958 |
} |
959 |
CFRelease( bsdPathAsCFString ); |
960 |
} |
961 |
IOObjectRelease( nextMedia ); |
962 |
} |
963 |
|
964 |
return kernResult;
|
965 |
} |
966 |
|
967 |
#endif
|
968 |
|
969 |
static int hdev_probe_device(const char *filename) |
970 |
{ |
971 |
struct stat st;
|
972 |
|
973 |
/* allow a dedicated CD-ROM driver to match with a higher priority */
|
974 |
if (strstart(filename, "/dev/cdrom", NULL)) |
975 |
return 50; |
976 |
|
977 |
if (stat(filename, &st) >= 0 && |
978 |
(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
979 |
return 100; |
980 |
} |
981 |
|
982 |
return 0; |
983 |
} |
984 |
|
985 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
986 |
{ |
987 |
BDRVRawState *s = bs->opaque; |
988 |
|
989 |
#ifdef CONFIG_COCOA
|
990 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
991 |
kern_return_t kernResult; |
992 |
io_iterator_t mediaIterator; |
993 |
char bsdPath[ MAXPATHLEN ];
|
994 |
int fd;
|
995 |
|
996 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
997 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
998 |
|
999 |
if ( bsdPath[ 0 ] != '\0' ) { |
1000 |
strcat(bsdPath,"s0");
|
1001 |
/* some CDs don't have a partition 0 */
|
1002 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
1003 |
if (fd < 0) { |
1004 |
bsdPath[strlen(bsdPath)-1] = '1'; |
1005 |
} else {
|
1006 |
close(fd); |
1007 |
} |
1008 |
filename = bsdPath; |
1009 |
} |
1010 |
|
1011 |
if ( mediaIterator )
|
1012 |
IOObjectRelease( mediaIterator ); |
1013 |
} |
1014 |
#endif
|
1015 |
|
1016 |
s->type = FTYPE_FILE; |
1017 |
#if defined(__linux__)
|
1018 |
{ |
1019 |
char resolved_path[ MAXPATHLEN ], *temp;
|
1020 |
|
1021 |
temp = realpath(filename, resolved_path); |
1022 |
if (temp && strstart(temp, "/dev/sg", NULL)) { |
1023 |
bs->sg = 1;
|
1024 |
} |
1025 |
} |
1026 |
#endif
|
1027 |
|
1028 |
return raw_open_common(bs, filename, flags, 0); |
1029 |
} |
1030 |
|
1031 |
#if defined(__linux__)
|
1032 |
/* Note: we do not have a reliable method to detect if the floppy is
|
1033 |
present. The current method is to try to open the floppy at every
|
1034 |
I/O and to keep it opened during a few hundreds of ms. */
|
1035 |
static int fd_open(BlockDriverState *bs) |
1036 |
{ |
1037 |
BDRVRawState *s = bs->opaque; |
1038 |
int last_media_present;
|
1039 |
|
1040 |
if (s->type != FTYPE_FD)
|
1041 |
return 0; |
1042 |
last_media_present = (s->fd >= 0);
|
1043 |
if (s->fd >= 0 && |
1044 |
(get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
1045 |
close(s->fd); |
1046 |
s->fd = -1;
|
1047 |
#ifdef DEBUG_FLOPPY
|
1048 |
printf("Floppy closed\n");
|
1049 |
#endif
|
1050 |
} |
1051 |
if (s->fd < 0) { |
1052 |
if (s->fd_got_error &&
|
1053 |
(get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
1054 |
#ifdef DEBUG_FLOPPY
|
1055 |
printf("No floppy (open delayed)\n");
|
1056 |
#endif
|
1057 |
return -EIO;
|
1058 |
} |
1059 |
s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK); |
1060 |
if (s->fd < 0) { |
1061 |
s->fd_error_time = get_clock(); |
1062 |
s->fd_got_error = 1;
|
1063 |
if (last_media_present)
|
1064 |
s->fd_media_changed = 1;
|
1065 |
#ifdef DEBUG_FLOPPY
|
1066 |
printf("No floppy\n");
|
1067 |
#endif
|
1068 |
return -EIO;
|
1069 |
} |
1070 |
#ifdef DEBUG_FLOPPY
|
1071 |
printf("Floppy opened\n");
|
1072 |
#endif
|
1073 |
} |
1074 |
if (!last_media_present)
|
1075 |
s->fd_media_changed = 1;
|
1076 |
s->fd_open_time = get_clock(); |
1077 |
s->fd_got_error = 0;
|
1078 |
return 0; |
1079 |
} |
1080 |
|
1081 |
static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1082 |
{ |
1083 |
BDRVRawState *s = bs->opaque; |
1084 |
|
1085 |
return ioctl(s->fd, req, buf);
|
1086 |
} |
1087 |
|
1088 |
static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
|
1089 |
unsigned long int req, void *buf, |
1090 |
BlockDriverCompletionFunc *cb, void *opaque)
|
1091 |
{ |
1092 |
BDRVRawState *s = bs->opaque; |
1093 |
|
1094 |
if (fd_open(bs) < 0) |
1095 |
return NULL; |
1096 |
return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
|
1097 |
} |
1098 |
|
1099 |
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1100 |
static int fd_open(BlockDriverState *bs) |
1101 |
{ |
1102 |
BDRVRawState *s = bs->opaque; |
1103 |
|
1104 |
/* this is just to ensure s->fd is sane (its called by io ops) */
|
1105 |
if (s->fd >= 0) |
1106 |
return 0; |
1107 |
return -EIO;
|
1108 |
} |
1109 |
#else /* !linux && !FreeBSD */ |
1110 |
|
1111 |
static int fd_open(BlockDriverState *bs) |
1112 |
{ |
1113 |
return 0; |
1114 |
} |
1115 |
|
1116 |
#endif /* !linux && !FreeBSD */ |
1117 |
|
1118 |
static int hdev_create(const char *filename, QEMUOptionParameter *options) |
1119 |
{ |
1120 |
int fd;
|
1121 |
int ret = 0; |
1122 |
struct stat stat_buf;
|
1123 |
int64_t total_size = 0;
|
1124 |
|
1125 |
/* Read out options */
|
1126 |
while (options && options->name) {
|
1127 |
if (!strcmp(options->name, "size")) { |
1128 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
1129 |
} |
1130 |
options++; |
1131 |
} |
1132 |
|
1133 |
fd = open(filename, O_WRONLY | O_BINARY); |
1134 |
if (fd < 0) |
1135 |
return -errno;
|
1136 |
|
1137 |
if (fstat(fd, &stat_buf) < 0) |
1138 |
ret = -errno; |
1139 |
else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
1140 |
ret = -ENODEV; |
1141 |
else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) |
1142 |
ret = -ENOSPC; |
1143 |
|
1144 |
close(fd); |
1145 |
return ret;
|
1146 |
} |
1147 |
|
1148 |
static int hdev_has_zero_init(BlockDriverState *bs) |
1149 |
{ |
1150 |
return 0; |
1151 |
} |
1152 |
|
1153 |
static BlockDriver bdrv_host_device = {
|
1154 |
.format_name = "host_device",
|
1155 |
.protocol_name = "host_device",
|
1156 |
.instance_size = sizeof(BDRVRawState),
|
1157 |
.bdrv_probe_device = hdev_probe_device, |
1158 |
.bdrv_file_open = hdev_open, |
1159 |
.bdrv_close = raw_close, |
1160 |
.bdrv_create = hdev_create, |
1161 |
.create_options = raw_create_options, |
1162 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1163 |
.bdrv_flush = raw_flush, |
1164 |
|
1165 |
.bdrv_aio_readv = raw_aio_readv, |
1166 |
.bdrv_aio_writev = raw_aio_writev, |
1167 |
.bdrv_aio_flush = raw_aio_flush, |
1168 |
|
1169 |
.bdrv_read = raw_read, |
1170 |
.bdrv_write = raw_write, |
1171 |
.bdrv_getlength = raw_getlength, |
1172 |
.bdrv_get_allocated_file_size |
1173 |
= raw_get_allocated_file_size, |
1174 |
|
1175 |
/* generic scsi device */
|
1176 |
#ifdef __linux__
|
1177 |
.bdrv_ioctl = hdev_ioctl, |
1178 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1179 |
#endif
|
1180 |
}; |
1181 |
|
1182 |
#ifdef __linux__
|
1183 |
static int floppy_open(BlockDriverState *bs, const char *filename, int flags) |
1184 |
{ |
1185 |
BDRVRawState *s = bs->opaque; |
1186 |
int ret;
|
1187 |
|
1188 |
s->type = FTYPE_FD; |
1189 |
|
1190 |
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
|
1191 |
ret = raw_open_common(bs, filename, flags, O_NONBLOCK); |
1192 |
if (ret)
|
1193 |
return ret;
|
1194 |
|
1195 |
/* close fd so that we can reopen it as needed */
|
1196 |
close(s->fd); |
1197 |
s->fd = -1;
|
1198 |
s->fd_media_changed = 1;
|
1199 |
|
1200 |
return 0; |
1201 |
} |
1202 |
|
1203 |
static int floppy_probe_device(const char *filename) |
1204 |
{ |
1205 |
int fd, ret;
|
1206 |
int prio = 0; |
1207 |
struct floppy_struct fdparam;
|
1208 |
struct stat st;
|
1209 |
|
1210 |
if (strstart(filename, "/dev/fd", NULL)) |
1211 |
prio = 50;
|
1212 |
|
1213 |
fd = open(filename, O_RDONLY | O_NONBLOCK); |
1214 |
if (fd < 0) { |
1215 |
goto out;
|
1216 |
} |
1217 |
ret = fstat(fd, &st); |
1218 |
if (ret == -1 || !S_ISBLK(st.st_mode)) { |
1219 |
goto outc;
|
1220 |
} |
1221 |
|
1222 |
/* Attempt to detect via a floppy specific ioctl */
|
1223 |
ret = ioctl(fd, FDGETPRM, &fdparam); |
1224 |
if (ret >= 0) |
1225 |
prio = 100;
|
1226 |
|
1227 |
outc:
|
1228 |
close(fd); |
1229 |
out:
|
1230 |
return prio;
|
1231 |
} |
1232 |
|
1233 |
|
1234 |
static int floppy_is_inserted(BlockDriverState *bs) |
1235 |
{ |
1236 |
return fd_open(bs) >= 0; |
1237 |
} |
1238 |
|
1239 |
static int floppy_media_changed(BlockDriverState *bs) |
1240 |
{ |
1241 |
BDRVRawState *s = bs->opaque; |
1242 |
int ret;
|
1243 |
|
1244 |
/*
|
1245 |
* XXX: we do not have a true media changed indication.
|
1246 |
* It does not work if the floppy is changed without trying to read it.
|
1247 |
*/
|
1248 |
fd_open(bs); |
1249 |
ret = s->fd_media_changed; |
1250 |
s->fd_media_changed = 0;
|
1251 |
#ifdef DEBUG_FLOPPY
|
1252 |
printf("Floppy changed=%d\n", ret);
|
1253 |
#endif
|
1254 |
return ret;
|
1255 |
} |
1256 |
|
1257 |
static int floppy_eject(BlockDriverState *bs, int eject_flag) |
1258 |
{ |
1259 |
BDRVRawState *s = bs->opaque; |
1260 |
int fd;
|
1261 |
|
1262 |
if (s->fd >= 0) { |
1263 |
close(s->fd); |
1264 |
s->fd = -1;
|
1265 |
} |
1266 |
fd = open(bs->filename, s->open_flags | O_NONBLOCK); |
1267 |
if (fd >= 0) { |
1268 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1269 |
perror("FDEJECT");
|
1270 |
close(fd); |
1271 |
} |
1272 |
|
1273 |
return 0; |
1274 |
} |
1275 |
|
1276 |
static BlockDriver bdrv_host_floppy = {
|
1277 |
.format_name = "host_floppy",
|
1278 |
.protocol_name = "host_floppy",
|
1279 |
.instance_size = sizeof(BDRVRawState),
|
1280 |
.bdrv_probe_device = floppy_probe_device, |
1281 |
.bdrv_file_open = floppy_open, |
1282 |
.bdrv_close = raw_close, |
1283 |
.bdrv_create = hdev_create, |
1284 |
.create_options = raw_create_options, |
1285 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1286 |
.bdrv_flush = raw_flush, |
1287 |
|
1288 |
.bdrv_aio_readv = raw_aio_readv, |
1289 |
.bdrv_aio_writev = raw_aio_writev, |
1290 |
.bdrv_aio_flush = raw_aio_flush, |
1291 |
|
1292 |
.bdrv_read = raw_read, |
1293 |
.bdrv_write = raw_write, |
1294 |
.bdrv_getlength = raw_getlength, |
1295 |
.bdrv_get_allocated_file_size |
1296 |
= raw_get_allocated_file_size, |
1297 |
|
1298 |
/* removable device support */
|
1299 |
.bdrv_is_inserted = floppy_is_inserted, |
1300 |
.bdrv_media_changed = floppy_media_changed, |
1301 |
.bdrv_eject = floppy_eject, |
1302 |
}; |
1303 |
|
1304 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1305 |
{ |
1306 |
BDRVRawState *s = bs->opaque; |
1307 |
|
1308 |
s->type = FTYPE_CD; |
1309 |
|
1310 |
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
|
1311 |
return raw_open_common(bs, filename, flags, O_NONBLOCK);
|
1312 |
} |
1313 |
|
1314 |
static int cdrom_probe_device(const char *filename) |
1315 |
{ |
1316 |
int fd, ret;
|
1317 |
int prio = 0; |
1318 |
struct stat st;
|
1319 |
|
1320 |
fd = open(filename, O_RDONLY | O_NONBLOCK); |
1321 |
if (fd < 0) { |
1322 |
goto out;
|
1323 |
} |
1324 |
ret = fstat(fd, &st); |
1325 |
if (ret == -1 || !S_ISBLK(st.st_mode)) { |
1326 |
goto outc;
|
1327 |
} |
1328 |
|
1329 |
/* Attempt to detect via a CDROM specific ioctl */
|
1330 |
ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1331 |
if (ret >= 0) |
1332 |
prio = 100;
|
1333 |
|
1334 |
outc:
|
1335 |
close(fd); |
1336 |
out:
|
1337 |
return prio;
|
1338 |
} |
1339 |
|
1340 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1341 |
{ |
1342 |
BDRVRawState *s = bs->opaque; |
1343 |
int ret;
|
1344 |
|
1345 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1346 |
if (ret == CDS_DISC_OK)
|
1347 |
return 1; |
1348 |
return 0; |
1349 |
} |
1350 |
|
1351 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1352 |
{ |
1353 |
BDRVRawState *s = bs->opaque; |
1354 |
|
1355 |
if (eject_flag) {
|
1356 |
if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
1357 |
perror("CDROMEJECT");
|
1358 |
} else {
|
1359 |
if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
1360 |
perror("CDROMEJECT");
|
1361 |
} |
1362 |
|
1363 |
return 0; |
1364 |
} |
1365 |
|
1366 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1367 |
{ |
1368 |
BDRVRawState *s = bs->opaque; |
1369 |
|
1370 |
if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1371 |
/*
|
1372 |
* Note: an error can happen if the distribution automatically
|
1373 |
* mounts the CD-ROM
|
1374 |
*/
|
1375 |
/* perror("CDROM_LOCKDOOR"); */
|
1376 |
} |
1377 |
|
1378 |
return 0; |
1379 |
} |
1380 |
|
1381 |
static BlockDriver bdrv_host_cdrom = {
|
1382 |
.format_name = "host_cdrom",
|
1383 |
.protocol_name = "host_cdrom",
|
1384 |
.instance_size = sizeof(BDRVRawState),
|
1385 |
.bdrv_probe_device = cdrom_probe_device, |
1386 |
.bdrv_file_open = cdrom_open, |
1387 |
.bdrv_close = raw_close, |
1388 |
.bdrv_create = hdev_create, |
1389 |
.create_options = raw_create_options, |
1390 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1391 |
.bdrv_flush = raw_flush, |
1392 |
|
1393 |
.bdrv_aio_readv = raw_aio_readv, |
1394 |
.bdrv_aio_writev = raw_aio_writev, |
1395 |
.bdrv_aio_flush = raw_aio_flush, |
1396 |
|
1397 |
.bdrv_read = raw_read, |
1398 |
.bdrv_write = raw_write, |
1399 |
.bdrv_getlength = raw_getlength, |
1400 |
.bdrv_get_allocated_file_size |
1401 |
= raw_get_allocated_file_size, |
1402 |
|
1403 |
/* removable device support */
|
1404 |
.bdrv_is_inserted = cdrom_is_inserted, |
1405 |
.bdrv_eject = cdrom_eject, |
1406 |
.bdrv_set_locked = cdrom_set_locked, |
1407 |
|
1408 |
/* generic scsi device */
|
1409 |
.bdrv_ioctl = hdev_ioctl, |
1410 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1411 |
}; |
1412 |
#endif /* __linux__ */ |
1413 |
|
1414 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1415 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1416 |
{ |
1417 |
BDRVRawState *s = bs->opaque; |
1418 |
int ret;
|
1419 |
|
1420 |
s->type = FTYPE_CD; |
1421 |
|
1422 |
ret = raw_open_common(bs, filename, flags, 0);
|
1423 |
if (ret)
|
1424 |
return ret;
|
1425 |
|
1426 |
/* make sure the door isnt locked at this time */
|
1427 |
ioctl(s->fd, CDIOCALLOW); |
1428 |
return 0; |
1429 |
} |
1430 |
|
1431 |
static int cdrom_probe_device(const char *filename) |
1432 |
{ |
1433 |
if (strstart(filename, "/dev/cd", NULL) || |
1434 |
strstart(filename, "/dev/acd", NULL)) |
1435 |
return 100; |
1436 |
return 0; |
1437 |
} |
1438 |
|
1439 |
static int cdrom_reopen(BlockDriverState *bs) |
1440 |
{ |
1441 |
BDRVRawState *s = bs->opaque; |
1442 |
int fd;
|
1443 |
|
1444 |
/*
|
1445 |
* Force reread of possibly changed/newly loaded disc,
|
1446 |
* FreeBSD seems to not notice sometimes...
|
1447 |
*/
|
1448 |
if (s->fd >= 0) |
1449 |
close(s->fd); |
1450 |
fd = open(bs->filename, s->open_flags, 0644);
|
1451 |
if (fd < 0) { |
1452 |
s->fd = -1;
|
1453 |
return -EIO;
|
1454 |
} |
1455 |
s->fd = fd; |
1456 |
|
1457 |
/* make sure the door isnt locked at this time */
|
1458 |
ioctl(s->fd, CDIOCALLOW); |
1459 |
return 0; |
1460 |
} |
1461 |
|
1462 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1463 |
{ |
1464 |
return raw_getlength(bs) > 0; |
1465 |
} |
1466 |
|
1467 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1468 |
{ |
1469 |
BDRVRawState *s = bs->opaque; |
1470 |
|
1471 |
if (s->fd < 0) |
1472 |
return -ENOTSUP;
|
1473 |
|
1474 |
(void) ioctl(s->fd, CDIOCALLOW);
|
1475 |
|
1476 |
if (eject_flag) {
|
1477 |
if (ioctl(s->fd, CDIOCEJECT) < 0) |
1478 |
perror("CDIOCEJECT");
|
1479 |
} else {
|
1480 |
if (ioctl(s->fd, CDIOCCLOSE) < 0) |
1481 |
perror("CDIOCCLOSE");
|
1482 |
} |
1483 |
|
1484 |
if (cdrom_reopen(bs) < 0) |
1485 |
return -ENOTSUP;
|
1486 |
return 0; |
1487 |
} |
1488 |
|
1489 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1490 |
{ |
1491 |
BDRVRawState *s = bs->opaque; |
1492 |
|
1493 |
if (s->fd < 0) |
1494 |
return -ENOTSUP;
|
1495 |
if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
1496 |
/*
|
1497 |
* Note: an error can happen if the distribution automatically
|
1498 |
* mounts the CD-ROM
|
1499 |
*/
|
1500 |
/* perror("CDROM_LOCKDOOR"); */
|
1501 |
} |
1502 |
|
1503 |
return 0; |
1504 |
} |
1505 |
|
1506 |
static BlockDriver bdrv_host_cdrom = {
|
1507 |
.format_name = "host_cdrom",
|
1508 |
.protocol_name = "host_cdrom",
|
1509 |
.instance_size = sizeof(BDRVRawState),
|
1510 |
.bdrv_probe_device = cdrom_probe_device, |
1511 |
.bdrv_file_open = cdrom_open, |
1512 |
.bdrv_close = raw_close, |
1513 |
.bdrv_create = hdev_create, |
1514 |
.create_options = raw_create_options, |
1515 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1516 |
.bdrv_flush = raw_flush, |
1517 |
|
1518 |
.bdrv_aio_readv = raw_aio_readv, |
1519 |
.bdrv_aio_writev = raw_aio_writev, |
1520 |
.bdrv_aio_flush = raw_aio_flush, |
1521 |
|
1522 |
.bdrv_read = raw_read, |
1523 |
.bdrv_write = raw_write, |
1524 |
.bdrv_getlength = raw_getlength, |
1525 |
.bdrv_get_allocated_file_size |
1526 |
= raw_get_allocated_file_size, |
1527 |
|
1528 |
/* removable device support */
|
1529 |
.bdrv_is_inserted = cdrom_is_inserted, |
1530 |
.bdrv_eject = cdrom_eject, |
1531 |
.bdrv_set_locked = cdrom_set_locked, |
1532 |
}; |
1533 |
#endif /* __FreeBSD__ */ |
1534 |
|
1535 |
static void bdrv_file_init(void) |
1536 |
{ |
1537 |
/*
|
1538 |
* Register all the drivers. Note that order is important, the driver
|
1539 |
* registered last will get probed first.
|
1540 |
*/
|
1541 |
bdrv_register(&bdrv_file); |
1542 |
bdrv_register(&bdrv_host_device); |
1543 |
#ifdef __linux__
|
1544 |
bdrv_register(&bdrv_host_floppy); |
1545 |
bdrv_register(&bdrv_host_cdrom); |
1546 |
#endif
|
1547 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1548 |
bdrv_register(&bdrv_host_cdrom); |
1549 |
#endif
|
1550 |
} |
1551 |
|
1552 |
block_init(bdrv_file_init); |