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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>
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#include <CoreFoundation/CoreFoundation.h> |
42 |
#endif
|
43 |
|
44 |
#ifdef __sun__
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#define _POSIX_PTHREAD_SEMANTICS 1 |
46 |
#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
|
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#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
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#include <sys/disk.h> |
62 |
#include <sys/cdio.h> |
63 |
#endif
|
64 |
|
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#ifdef __OpenBSD__
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#include <sys/ioctl.h> |
67 |
#include <sys/disklabel.h> |
68 |
#include <sys/dkio.h> |
69 |
#endif
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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
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77 |
|
78 |
#ifdef __DragonFly__
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#include <sys/ioctl.h> |
80 |
#include <sys/diskslice.h> |
81 |
#endif
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82 |
|
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#ifdef CONFIG_XFS
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#include <xfs/xfs.h> |
85 |
#endif
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86 |
|
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//#define DEBUG_FLOPPY
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88 |
|
89 |
//#define DEBUG_BLOCK
|
90 |
#if defined(DEBUG_BLOCK)
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#define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ |
92 |
{ qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) |
93 |
#else
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#define DEBUG_BLOCK_PRINT(formatCstr, ...)
|
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#endif
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96 |
|
97 |
/* 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 |
113 |
#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); |
144 |
static int64_t raw_getlength(BlockDriverState *bs);
|
145 |
|
146 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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static int cdrom_reopen(BlockDriverState *bs); |
148 |
#endif
|
149 |
|
150 |
#if defined(__NetBSD__)
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static int raw_normalize_devicepath(const char **filename) |
152 |
{ |
153 |
static char namebuf[PATH_MAX]; |
154 |
const char *dp, *fname; |
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struct stat sb;
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|
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fname = *filename; |
158 |
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)); |
162 |
return -errno;
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} |
164 |
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if (!S_ISBLK(sb.st_mode)) {
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return 0; |
167 |
} |
168 |
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if (dp == NULL) { |
170 |
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); |
174 |
} |
175 |
fprintf(stderr, "%s is a block device", fname);
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*filename = namebuf; |
177 |
fprintf(stderr, ", using %s\n", *filename);
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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 |
|
188 |
static void raw_parse_flags(int bdrv_flags, int *open_flags) |
189 |
{ |
190 |
assert(open_flags != NULL);
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|
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*open_flags |= O_BINARY; |
193 |
*open_flags &= ~O_ACCMODE; |
194 |
if (bdrv_flags & BDRV_O_RDWR) {
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*open_flags |= O_RDWR; |
196 |
} else {
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*open_flags |= O_RDONLY; |
198 |
} |
199 |
|
200 |
/* 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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*open_flags |= O_DIRECT; |
204 |
} |
205 |
} |
206 |
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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) |
209 |
{ |
210 |
int ret = -1; |
211 |
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)) { |
219 |
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220 |
/* if non-NULL, laio_init() has already been run */
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221 |
if (*aio_ctx == NULL) { |
222 |
*aio_ctx = laio_init(); |
223 |
if (!*aio_ctx) {
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goto error;
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} |
226 |
} |
227 |
*use_aio = 1;
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} else {
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*use_aio = 0;
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} |
231 |
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ret = 0;
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233 |
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error:
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return ret;
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} |
237 |
#endif
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238 |
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239 |
static int raw_open_common(BlockDriverState *bs, const char *filename, |
240 |
int bdrv_flags, int open_flags) |
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{ |
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BDRVRawState *s = bs->opaque; |
243 |
int fd, ret;
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ret = raw_normalize_devicepath(&filename); |
246 |
if (ret != 0) { |
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return ret;
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} |
249 |
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s->open_flags = open_flags; |
251 |
raw_parse_flags(bdrv_flags, &s->open_flags); |
252 |
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s->fd = -1;
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fd = qemu_open(filename, s->open_flags, 0644);
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255 |
if (fd < 0) { |
256 |
ret = -errno; |
257 |
if (ret == -EROFS)
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ret = -EACCES; |
259 |
return ret;
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} |
261 |
s->fd = fd; |
262 |
s->aligned_buf = NULL;
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263 |
|
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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); |
271 |
if (s->aligned_buf == NULL) { |
272 |
goto out_close;
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} |
274 |
} |
275 |
|
276 |
/* We're falling back to POSIX AIO in some cases so init always */
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if (paio_init() < 0) { |
278 |
goto out_free_buf;
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} |
280 |
|
281 |
#ifdef CONFIG_LINUX_AIO
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282 |
if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
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goto out_close;
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284 |
} |
285 |
#endif
|
286 |
|
287 |
#ifdef CONFIG_XFS
|
288 |
if (platform_test_xfs_fd(s->fd)) {
|
289 |
s->is_xfs = 1;
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290 |
} |
291 |
#endif
|
292 |
|
293 |
return 0; |
294 |
|
295 |
out_free_buf:
|
296 |
qemu_vfree(s->aligned_buf); |
297 |
out_close:
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298 |
qemu_close(fd); |
299 |
return -errno;
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300 |
} |
301 |
|
302 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
303 |
{ |
304 |
BDRVRawState *s = bs->opaque; |
305 |
|
306 |
s->type = FTYPE_FILE; |
307 |
return raw_open_common(bs, filename, flags, 0); |
308 |
} |
309 |
|
310 |
/* XXX: use host sector size if necessary with:
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311 |
#ifdef DIOCGSECTORSIZE
|
312 |
{
|
313 |
unsigned int sectorsize = 512;
|
314 |
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
|
315 |
sectorsize > bufsize)
|
316 |
bufsize = sectorsize;
|
317 |
}
|
318 |
#endif
|
319 |
#ifdef CONFIG_COCOA
|
320 |
uint32_t blockSize = 512;
|
321 |
if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
|
322 |
bufsize = blockSize;
|
323 |
}
|
324 |
#endif
|
325 |
*/
|
326 |
|
327 |
/*
|
328 |
* Check if all memory in this vector is sector aligned.
|
329 |
*/
|
330 |
static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov) |
331 |
{ |
332 |
int i;
|
333 |
|
334 |
for (i = 0; i < qiov->niov; i++) { |
335 |
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
|
336 |
return 0; |
337 |
} |
338 |
} |
339 |
|
340 |
return 1; |
341 |
} |
342 |
|
343 |
static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
|
344 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
345 |
BlockDriverCompletionFunc *cb, void *opaque, int type) |
346 |
{ |
347 |
BDRVRawState *s = bs->opaque; |
348 |
|
349 |
if (fd_open(bs) < 0) |
350 |
return NULL; |
351 |
|
352 |
/*
|
353 |
* If O_DIRECT is used the buffer needs to be aligned on a sector
|
354 |
* boundary. Check if this is the case or tell the low-level
|
355 |
* driver that it needs to copy the buffer.
|
356 |
*/
|
357 |
if ((bs->open_flags & BDRV_O_NOCACHE)) {
|
358 |
if (!qiov_is_aligned(bs, qiov)) {
|
359 |
type |= QEMU_AIO_MISALIGNED; |
360 |
#ifdef CONFIG_LINUX_AIO
|
361 |
} else if (s->use_aio) { |
362 |
return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
|
363 |
nb_sectors, cb, opaque, type); |
364 |
#endif
|
365 |
} |
366 |
} |
367 |
|
368 |
return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
|
369 |
cb, opaque, type); |
370 |
} |
371 |
|
372 |
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
|
373 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
374 |
BlockDriverCompletionFunc *cb, void *opaque)
|
375 |
{ |
376 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
377 |
cb, opaque, QEMU_AIO_READ); |
378 |
} |
379 |
|
380 |
static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
|
381 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
382 |
BlockDriverCompletionFunc *cb, void *opaque)
|
383 |
{ |
384 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
385 |
cb, opaque, QEMU_AIO_WRITE); |
386 |
} |
387 |
|
388 |
static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
|
389 |
BlockDriverCompletionFunc *cb, void *opaque)
|
390 |
{ |
391 |
BDRVRawState *s = bs->opaque; |
392 |
|
393 |
if (fd_open(bs) < 0) |
394 |
return NULL; |
395 |
|
396 |
return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
397 |
} |
398 |
|
399 |
static void raw_close(BlockDriverState *bs) |
400 |
{ |
401 |
BDRVRawState *s = bs->opaque; |
402 |
if (s->fd >= 0) { |
403 |
qemu_close(s->fd); |
404 |
s->fd = -1;
|
405 |
if (s->aligned_buf != NULL) |
406 |
qemu_vfree(s->aligned_buf); |
407 |
} |
408 |
} |
409 |
|
410 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
411 |
{ |
412 |
BDRVRawState *s = bs->opaque; |
413 |
struct stat st;
|
414 |
|
415 |
if (fstat(s->fd, &st)) {
|
416 |
return -errno;
|
417 |
} |
418 |
|
419 |
if (S_ISREG(st.st_mode)) {
|
420 |
if (ftruncate(s->fd, offset) < 0) { |
421 |
return -errno;
|
422 |
} |
423 |
} else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
424 |
if (offset > raw_getlength(bs)) {
|
425 |
return -EINVAL;
|
426 |
} |
427 |
} else {
|
428 |
return -ENOTSUP;
|
429 |
} |
430 |
|
431 |
return 0; |
432 |
} |
433 |
|
434 |
#ifdef __OpenBSD__
|
435 |
static int64_t raw_getlength(BlockDriverState *bs)
|
436 |
{ |
437 |
BDRVRawState *s = bs->opaque; |
438 |
int fd = s->fd;
|
439 |
struct stat st;
|
440 |
|
441 |
if (fstat(fd, &st))
|
442 |
return -1; |
443 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
444 |
struct disklabel dl;
|
445 |
|
446 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
447 |
return -1; |
448 |
return (uint64_t)dl.d_secsize *
|
449 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
450 |
} else
|
451 |
return st.st_size;
|
452 |
} |
453 |
#elif defined(__NetBSD__)
|
454 |
static int64_t raw_getlength(BlockDriverState *bs)
|
455 |
{ |
456 |
BDRVRawState *s = bs->opaque; |
457 |
int fd = s->fd;
|
458 |
struct stat st;
|
459 |
|
460 |
if (fstat(fd, &st))
|
461 |
return -1; |
462 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
463 |
struct dkwedge_info dkw;
|
464 |
|
465 |
if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { |
466 |
return dkw.dkw_size * 512; |
467 |
} else {
|
468 |
struct disklabel dl;
|
469 |
|
470 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
471 |
return -1; |
472 |
return (uint64_t)dl.d_secsize *
|
473 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
474 |
} |
475 |
} else
|
476 |
return st.st_size;
|
477 |
} |
478 |
#elif defined(__sun__)
|
479 |
static int64_t raw_getlength(BlockDriverState *bs)
|
480 |
{ |
481 |
BDRVRawState *s = bs->opaque; |
482 |
struct dk_minfo minfo;
|
483 |
int ret;
|
484 |
|
485 |
ret = fd_open(bs); |
486 |
if (ret < 0) { |
487 |
return ret;
|
488 |
} |
489 |
|
490 |
/*
|
491 |
* Use the DKIOCGMEDIAINFO ioctl to read the size.
|
492 |
*/
|
493 |
ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); |
494 |
if (ret != -1) { |
495 |
return minfo.dki_lbsize * minfo.dki_capacity;
|
496 |
} |
497 |
|
498 |
/*
|
499 |
* There are reports that lseek on some devices fails, but
|
500 |
* irc discussion said that contingency on contingency was overkill.
|
501 |
*/
|
502 |
return lseek(s->fd, 0, SEEK_END); |
503 |
} |
504 |
#elif defined(CONFIG_BSD)
|
505 |
static int64_t raw_getlength(BlockDriverState *bs)
|
506 |
{ |
507 |
BDRVRawState *s = bs->opaque; |
508 |
int fd = s->fd;
|
509 |
int64_t size; |
510 |
struct stat sb;
|
511 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
512 |
int reopened = 0; |
513 |
#endif
|
514 |
int ret;
|
515 |
|
516 |
ret = fd_open(bs); |
517 |
if (ret < 0) |
518 |
return ret;
|
519 |
|
520 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
521 |
again:
|
522 |
#endif
|
523 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
524 |
#ifdef DIOCGMEDIASIZE
|
525 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
526 |
#elif defined(DIOCGPART)
|
527 |
{ |
528 |
struct partinfo pi;
|
529 |
if (ioctl(fd, DIOCGPART, &pi) == 0) |
530 |
size = pi.media_size; |
531 |
else
|
532 |
size = 0;
|
533 |
} |
534 |
if (size == 0) |
535 |
#endif
|
536 |
#if defined(__APPLE__) && defined(__MACH__)
|
537 |
size = LONG_LONG_MAX; |
538 |
#else
|
539 |
size = lseek(fd, 0LL, SEEK_END);
|
540 |
#endif
|
541 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
542 |
switch(s->type) {
|
543 |
case FTYPE_CD:
|
544 |
/* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
|
545 |
if (size == 2048LL * (unsigned)-1) |
546 |
size = 0;
|
547 |
/* XXX no disc? maybe we need to reopen... */
|
548 |
if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
549 |
reopened = 1;
|
550 |
goto again;
|
551 |
} |
552 |
} |
553 |
#endif
|
554 |
} else {
|
555 |
size = lseek(fd, 0, SEEK_END);
|
556 |
} |
557 |
return size;
|
558 |
} |
559 |
#else
|
560 |
static int64_t raw_getlength(BlockDriverState *bs)
|
561 |
{ |
562 |
BDRVRawState *s = bs->opaque; |
563 |
int ret;
|
564 |
|
565 |
ret = fd_open(bs); |
566 |
if (ret < 0) { |
567 |
return ret;
|
568 |
} |
569 |
|
570 |
return lseek(s->fd, 0, SEEK_END); |
571 |
} |
572 |
#endif
|
573 |
|
574 |
static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
|
575 |
{ |
576 |
struct stat st;
|
577 |
BDRVRawState *s = bs->opaque; |
578 |
|
579 |
if (fstat(s->fd, &st) < 0) { |
580 |
return -errno;
|
581 |
} |
582 |
return (int64_t)st.st_blocks * 512; |
583 |
} |
584 |
|
585 |
static int raw_create(const char *filename, QEMUOptionParameter *options) |
586 |
{ |
587 |
int fd;
|
588 |
int result = 0; |
589 |
int64_t total_size = 0;
|
590 |
|
591 |
/* Read out options */
|
592 |
while (options && options->name) {
|
593 |
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
594 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
595 |
} |
596 |
options++; |
597 |
} |
598 |
|
599 |
fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
600 |
0644);
|
601 |
if (fd < 0) { |
602 |
result = -errno; |
603 |
} else {
|
604 |
if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) { |
605 |
result = -errno; |
606 |
} |
607 |
if (qemu_close(fd) != 0) { |
608 |
result = -errno; |
609 |
} |
610 |
} |
611 |
return result;
|
612 |
} |
613 |
|
614 |
/*
|
615 |
* Returns true iff the specified sector is present in the disk image. Drivers
|
616 |
* not implementing the functionality are assumed to not support backing files,
|
617 |
* hence all their sectors are reported as allocated.
|
618 |
*
|
619 |
* If 'sector_num' is beyond the end of the disk image the return value is 0
|
620 |
* and 'pnum' is set to 0.
|
621 |
*
|
622 |
* 'pnum' is set to the number of sectors (including and immediately following
|
623 |
* the specified sector) that are known to be in the same
|
624 |
* allocated/unallocated state.
|
625 |
*
|
626 |
* 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
|
627 |
* beyond the end of the disk image it will be clamped.
|
628 |
*/
|
629 |
static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs, |
630 |
int64_t sector_num, |
631 |
int nb_sectors, int *pnum) |
632 |
{ |
633 |
off_t start, data, hole; |
634 |
int ret;
|
635 |
|
636 |
ret = fd_open(bs); |
637 |
if (ret < 0) { |
638 |
return ret;
|
639 |
} |
640 |
|
641 |
start = sector_num * BDRV_SECTOR_SIZE; |
642 |
|
643 |
#ifdef CONFIG_FIEMAP
|
644 |
|
645 |
BDRVRawState *s = bs->opaque; |
646 |
struct {
|
647 |
struct fiemap fm;
|
648 |
struct fiemap_extent fe;
|
649 |
} f; |
650 |
|
651 |
f.fm.fm_start = start; |
652 |
f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE; |
653 |
f.fm.fm_flags = 0;
|
654 |
f.fm.fm_extent_count = 1;
|
655 |
f.fm.fm_reserved = 0;
|
656 |
if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) { |
657 |
/* Assume everything is allocated. */
|
658 |
*pnum = nb_sectors; |
659 |
return 1; |
660 |
} |
661 |
|
662 |
if (f.fm.fm_mapped_extents == 0) { |
663 |
/* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length.
|
664 |
* f.fm.fm_start + f.fm.fm_length must be clamped to the file size!
|
665 |
*/
|
666 |
off_t length = lseek(s->fd, 0, SEEK_END);
|
667 |
hole = f.fm.fm_start; |
668 |
data = MIN(f.fm.fm_start + f.fm.fm_length, length); |
669 |
} else {
|
670 |
data = f.fe.fe_logical; |
671 |
hole = f.fe.fe_logical + f.fe.fe_length; |
672 |
} |
673 |
|
674 |
#elif defined SEEK_HOLE && defined SEEK_DATA
|
675 |
|
676 |
BDRVRawState *s = bs->opaque; |
677 |
|
678 |
hole = lseek(s->fd, start, SEEK_HOLE); |
679 |
if (hole == -1) { |
680 |
/* -ENXIO indicates that sector_num was past the end of the file.
|
681 |
* There is a virtual hole there. */
|
682 |
assert(errno != -ENXIO); |
683 |
|
684 |
/* Most likely EINVAL. Assume everything is allocated. */
|
685 |
*pnum = nb_sectors; |
686 |
return 1; |
687 |
} |
688 |
|
689 |
if (hole > start) {
|
690 |
data = start; |
691 |
} else {
|
692 |
/* On a hole. We need another syscall to find its end. */
|
693 |
data = lseek(s->fd, start, SEEK_DATA); |
694 |
if (data == -1) { |
695 |
data = lseek(s->fd, 0, SEEK_END);
|
696 |
} |
697 |
} |
698 |
#else
|
699 |
*pnum = nb_sectors; |
700 |
return 1; |
701 |
#endif
|
702 |
|
703 |
if (data <= start) {
|
704 |
/* On a data extent, compute sectors to the end of the extent. */
|
705 |
*pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE); |
706 |
return 1; |
707 |
} else {
|
708 |
/* On a hole, compute sectors to the beginning of the next extent. */
|
709 |
*pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); |
710 |
return 0; |
711 |
} |
712 |
} |
713 |
|
714 |
#ifdef CONFIG_XFS
|
715 |
static int xfs_discard(BDRVRawState *s, int64_t sector_num, int nb_sectors) |
716 |
{ |
717 |
struct xfs_flock64 fl;
|
718 |
|
719 |
memset(&fl, 0, sizeof(fl)); |
720 |
fl.l_whence = SEEK_SET; |
721 |
fl.l_start = sector_num << 9;
|
722 |
fl.l_len = (int64_t)nb_sectors << 9;
|
723 |
|
724 |
if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) { |
725 |
DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno));
|
726 |
return -errno;
|
727 |
} |
728 |
|
729 |
return 0; |
730 |
} |
731 |
#endif
|
732 |
|
733 |
static coroutine_fn int raw_co_discard(BlockDriverState *bs, |
734 |
int64_t sector_num, int nb_sectors)
|
735 |
{ |
736 |
#ifdef CONFIG_XFS
|
737 |
BDRVRawState *s = bs->opaque; |
738 |
|
739 |
if (s->is_xfs) {
|
740 |
return xfs_discard(s, sector_num, nb_sectors);
|
741 |
} |
742 |
#endif
|
743 |
|
744 |
return 0; |
745 |
} |
746 |
|
747 |
static QEMUOptionParameter raw_create_options[] = {
|
748 |
{ |
749 |
.name = BLOCK_OPT_SIZE, |
750 |
.type = OPT_SIZE, |
751 |
.help = "Virtual disk size"
|
752 |
}, |
753 |
{ NULL }
|
754 |
}; |
755 |
|
756 |
static BlockDriver bdrv_file = {
|
757 |
.format_name = "file",
|
758 |
.protocol_name = "file",
|
759 |
.instance_size = sizeof(BDRVRawState),
|
760 |
.bdrv_probe = NULL, /* no probe for protocols */ |
761 |
.bdrv_file_open = raw_open, |
762 |
.bdrv_close = raw_close, |
763 |
.bdrv_create = raw_create, |
764 |
.bdrv_co_discard = raw_co_discard, |
765 |
.bdrv_co_is_allocated = raw_co_is_allocated, |
766 |
|
767 |
.bdrv_aio_readv = raw_aio_readv, |
768 |
.bdrv_aio_writev = raw_aio_writev, |
769 |
.bdrv_aio_flush = raw_aio_flush, |
770 |
|
771 |
.bdrv_truncate = raw_truncate, |
772 |
.bdrv_getlength = raw_getlength, |
773 |
.bdrv_get_allocated_file_size |
774 |
= raw_get_allocated_file_size, |
775 |
|
776 |
.create_options = raw_create_options, |
777 |
}; |
778 |
|
779 |
/***********************************************/
|
780 |
/* host device */
|
781 |
|
782 |
#if defined(__APPLE__) && defined(__MACH__)
|
783 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
784 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
785 |
|
786 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
787 |
{ |
788 |
kern_return_t kernResult; |
789 |
mach_port_t masterPort; |
790 |
CFMutableDictionaryRef classesToMatch; |
791 |
|
792 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
793 |
if ( KERN_SUCCESS != kernResult ) {
|
794 |
printf( "IOMasterPort returned %d\n", kernResult );
|
795 |
} |
796 |
|
797 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
798 |
if ( classesToMatch == NULL ) { |
799 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
800 |
} else {
|
801 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
802 |
} |
803 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
804 |
if ( KERN_SUCCESS != kernResult )
|
805 |
{ |
806 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
807 |
} |
808 |
|
809 |
return kernResult;
|
810 |
} |
811 |
|
812 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
813 |
{ |
814 |
io_object_t nextMedia; |
815 |
kern_return_t kernResult = KERN_FAILURE; |
816 |
*bsdPath = '\0';
|
817 |
nextMedia = IOIteratorNext( mediaIterator ); |
818 |
if ( nextMedia )
|
819 |
{ |
820 |
CFTypeRef bsdPathAsCFString; |
821 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
822 |
if ( bsdPathAsCFString ) {
|
823 |
size_t devPathLength; |
824 |
strcpy( bsdPath, _PATH_DEV ); |
825 |
strcat( bsdPath, "r" );
|
826 |
devPathLength = strlen( bsdPath ); |
827 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
828 |
kernResult = KERN_SUCCESS; |
829 |
} |
830 |
CFRelease( bsdPathAsCFString ); |
831 |
} |
832 |
IOObjectRelease( nextMedia ); |
833 |
} |
834 |
|
835 |
return kernResult;
|
836 |
} |
837 |
|
838 |
#endif
|
839 |
|
840 |
static int hdev_probe_device(const char *filename) |
841 |
{ |
842 |
struct stat st;
|
843 |
|
844 |
/* allow a dedicated CD-ROM driver to match with a higher priority */
|
845 |
if (strstart(filename, "/dev/cdrom", NULL)) |
846 |
return 50; |
847 |
|
848 |
if (stat(filename, &st) >= 0 && |
849 |
(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
850 |
return 100; |
851 |
} |
852 |
|
853 |
return 0; |
854 |
} |
855 |
|
856 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
857 |
{ |
858 |
BDRVRawState *s = bs->opaque; |
859 |
|
860 |
#if defined(__APPLE__) && defined(__MACH__)
|
861 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
862 |
kern_return_t kernResult; |
863 |
io_iterator_t mediaIterator; |
864 |
char bsdPath[ MAXPATHLEN ];
|
865 |
int fd;
|
866 |
|
867 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
868 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
869 |
|
870 |
if ( bsdPath[ 0 ] != '\0' ) { |
871 |
strcat(bsdPath,"s0");
|
872 |
/* some CDs don't have a partition 0 */
|
873 |
fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
874 |
if (fd < 0) { |
875 |
bsdPath[strlen(bsdPath)-1] = '1'; |
876 |
} else {
|
877 |
qemu_close(fd); |
878 |
} |
879 |
filename = bsdPath; |
880 |
} |
881 |
|
882 |
if ( mediaIterator )
|
883 |
IOObjectRelease( mediaIterator ); |
884 |
} |
885 |
#endif
|
886 |
|
887 |
s->type = FTYPE_FILE; |
888 |
#if defined(__linux__)
|
889 |
{ |
890 |
char resolved_path[ MAXPATHLEN ], *temp;
|
891 |
|
892 |
temp = realpath(filename, resolved_path); |
893 |
if (temp && strstart(temp, "/dev/sg", NULL)) { |
894 |
bs->sg = 1;
|
895 |
} |
896 |
} |
897 |
#endif
|
898 |
|
899 |
return raw_open_common(bs, filename, flags, 0); |
900 |
} |
901 |
|
902 |
#if defined(__linux__)
|
903 |
/* Note: we do not have a reliable method to detect if the floppy is
|
904 |
present. The current method is to try to open the floppy at every
|
905 |
I/O and to keep it opened during a few hundreds of ms. */
|
906 |
static int fd_open(BlockDriverState *bs) |
907 |
{ |
908 |
BDRVRawState *s = bs->opaque; |
909 |
int last_media_present;
|
910 |
|
911 |
if (s->type != FTYPE_FD)
|
912 |
return 0; |
913 |
last_media_present = (s->fd >= 0);
|
914 |
if (s->fd >= 0 && |
915 |
(get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
916 |
qemu_close(s->fd); |
917 |
s->fd = -1;
|
918 |
#ifdef DEBUG_FLOPPY
|
919 |
printf("Floppy closed\n");
|
920 |
#endif
|
921 |
} |
922 |
if (s->fd < 0) { |
923 |
if (s->fd_got_error &&
|
924 |
(get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
925 |
#ifdef DEBUG_FLOPPY
|
926 |
printf("No floppy (open delayed)\n");
|
927 |
#endif
|
928 |
return -EIO;
|
929 |
} |
930 |
s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK); |
931 |
if (s->fd < 0) { |
932 |
s->fd_error_time = get_clock(); |
933 |
s->fd_got_error = 1;
|
934 |
if (last_media_present)
|
935 |
s->fd_media_changed = 1;
|
936 |
#ifdef DEBUG_FLOPPY
|
937 |
printf("No floppy\n");
|
938 |
#endif
|
939 |
return -EIO;
|
940 |
} |
941 |
#ifdef DEBUG_FLOPPY
|
942 |
printf("Floppy opened\n");
|
943 |
#endif
|
944 |
} |
945 |
if (!last_media_present)
|
946 |
s->fd_media_changed = 1;
|
947 |
s->fd_open_time = get_clock(); |
948 |
s->fd_got_error = 0;
|
949 |
return 0; |
950 |
} |
951 |
|
952 |
static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
953 |
{ |
954 |
BDRVRawState *s = bs->opaque; |
955 |
|
956 |
return ioctl(s->fd, req, buf);
|
957 |
} |
958 |
|
959 |
static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
|
960 |
unsigned long int req, void *buf, |
961 |
BlockDriverCompletionFunc *cb, void *opaque)
|
962 |
{ |
963 |
BDRVRawState *s = bs->opaque; |
964 |
|
965 |
if (fd_open(bs) < 0) |
966 |
return NULL; |
967 |
return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
|
968 |
} |
969 |
|
970 |
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
971 |
static int fd_open(BlockDriverState *bs) |
972 |
{ |
973 |
BDRVRawState *s = bs->opaque; |
974 |
|
975 |
/* this is just to ensure s->fd is sane (its called by io ops) */
|
976 |
if (s->fd >= 0) |
977 |
return 0; |
978 |
return -EIO;
|
979 |
} |
980 |
#else /* !linux && !FreeBSD */ |
981 |
|
982 |
static int fd_open(BlockDriverState *bs) |
983 |
{ |
984 |
return 0; |
985 |
} |
986 |
|
987 |
#endif /* !linux && !FreeBSD */ |
988 |
|
989 |
static int hdev_create(const char *filename, QEMUOptionParameter *options) |
990 |
{ |
991 |
int fd;
|
992 |
int ret = 0; |
993 |
struct stat stat_buf;
|
994 |
int64_t total_size = 0;
|
995 |
|
996 |
/* Read out options */
|
997 |
while (options && options->name) {
|
998 |
if (!strcmp(options->name, "size")) { |
999 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
1000 |
} |
1001 |
options++; |
1002 |
} |
1003 |
|
1004 |
fd = qemu_open(filename, O_WRONLY | O_BINARY); |
1005 |
if (fd < 0) |
1006 |
return -errno;
|
1007 |
|
1008 |
if (fstat(fd, &stat_buf) < 0) |
1009 |
ret = -errno; |
1010 |
else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
1011 |
ret = -ENODEV; |
1012 |
else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE) |
1013 |
ret = -ENOSPC; |
1014 |
|
1015 |
qemu_close(fd); |
1016 |
return ret;
|
1017 |
} |
1018 |
|
1019 |
static int hdev_has_zero_init(BlockDriverState *bs) |
1020 |
{ |
1021 |
return 0; |
1022 |
} |
1023 |
|
1024 |
static BlockDriver bdrv_host_device = {
|
1025 |
.format_name = "host_device",
|
1026 |
.protocol_name = "host_device",
|
1027 |
.instance_size = sizeof(BDRVRawState),
|
1028 |
.bdrv_probe_device = hdev_probe_device, |
1029 |
.bdrv_file_open = hdev_open, |
1030 |
.bdrv_close = raw_close, |
1031 |
.bdrv_create = hdev_create, |
1032 |
.create_options = raw_create_options, |
1033 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1034 |
|
1035 |
.bdrv_aio_readv = raw_aio_readv, |
1036 |
.bdrv_aio_writev = raw_aio_writev, |
1037 |
.bdrv_aio_flush = raw_aio_flush, |
1038 |
|
1039 |
.bdrv_truncate = raw_truncate, |
1040 |
.bdrv_getlength = raw_getlength, |
1041 |
.bdrv_get_allocated_file_size |
1042 |
= raw_get_allocated_file_size, |
1043 |
|
1044 |
/* generic scsi device */
|
1045 |
#ifdef __linux__
|
1046 |
.bdrv_ioctl = hdev_ioctl, |
1047 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1048 |
#endif
|
1049 |
}; |
1050 |
|
1051 |
#ifdef __linux__
|
1052 |
static int floppy_open(BlockDriverState *bs, const char *filename, int flags) |
1053 |
{ |
1054 |
BDRVRawState *s = bs->opaque; |
1055 |
int ret;
|
1056 |
|
1057 |
s->type = FTYPE_FD; |
1058 |
|
1059 |
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
|
1060 |
ret = raw_open_common(bs, filename, flags, O_NONBLOCK); |
1061 |
if (ret)
|
1062 |
return ret;
|
1063 |
|
1064 |
/* close fd so that we can reopen it as needed */
|
1065 |
qemu_close(s->fd); |
1066 |
s->fd = -1;
|
1067 |
s->fd_media_changed = 1;
|
1068 |
|
1069 |
return 0; |
1070 |
} |
1071 |
|
1072 |
static int floppy_probe_device(const char *filename) |
1073 |
{ |
1074 |
int fd, ret;
|
1075 |
int prio = 0; |
1076 |
struct floppy_struct fdparam;
|
1077 |
struct stat st;
|
1078 |
|
1079 |
if (strstart(filename, "/dev/fd", NULL) && |
1080 |
!strstart(filename, "/dev/fdset/", NULL)) { |
1081 |
prio = 50;
|
1082 |
} |
1083 |
|
1084 |
fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
1085 |
if (fd < 0) { |
1086 |
goto out;
|
1087 |
} |
1088 |
ret = fstat(fd, &st); |
1089 |
if (ret == -1 || !S_ISBLK(st.st_mode)) { |
1090 |
goto outc;
|
1091 |
} |
1092 |
|
1093 |
/* Attempt to detect via a floppy specific ioctl */
|
1094 |
ret = ioctl(fd, FDGETPRM, &fdparam); |
1095 |
if (ret >= 0) |
1096 |
prio = 100;
|
1097 |
|
1098 |
outc:
|
1099 |
qemu_close(fd); |
1100 |
out:
|
1101 |
return prio;
|
1102 |
} |
1103 |
|
1104 |
|
1105 |
static int floppy_is_inserted(BlockDriverState *bs) |
1106 |
{ |
1107 |
return fd_open(bs) >= 0; |
1108 |
} |
1109 |
|
1110 |
static int floppy_media_changed(BlockDriverState *bs) |
1111 |
{ |
1112 |
BDRVRawState *s = bs->opaque; |
1113 |
int ret;
|
1114 |
|
1115 |
/*
|
1116 |
* XXX: we do not have a true media changed indication.
|
1117 |
* It does not work if the floppy is changed without trying to read it.
|
1118 |
*/
|
1119 |
fd_open(bs); |
1120 |
ret = s->fd_media_changed; |
1121 |
s->fd_media_changed = 0;
|
1122 |
#ifdef DEBUG_FLOPPY
|
1123 |
printf("Floppy changed=%d\n", ret);
|
1124 |
#endif
|
1125 |
return ret;
|
1126 |
} |
1127 |
|
1128 |
static void floppy_eject(BlockDriverState *bs, bool eject_flag) |
1129 |
{ |
1130 |
BDRVRawState *s = bs->opaque; |
1131 |
int fd;
|
1132 |
|
1133 |
if (s->fd >= 0) { |
1134 |
qemu_close(s->fd); |
1135 |
s->fd = -1;
|
1136 |
} |
1137 |
fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK); |
1138 |
if (fd >= 0) { |
1139 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1140 |
perror("FDEJECT");
|
1141 |
qemu_close(fd); |
1142 |
} |
1143 |
} |
1144 |
|
1145 |
static BlockDriver bdrv_host_floppy = {
|
1146 |
.format_name = "host_floppy",
|
1147 |
.protocol_name = "host_floppy",
|
1148 |
.instance_size = sizeof(BDRVRawState),
|
1149 |
.bdrv_probe_device = floppy_probe_device, |
1150 |
.bdrv_file_open = floppy_open, |
1151 |
.bdrv_close = raw_close, |
1152 |
.bdrv_create = hdev_create, |
1153 |
.create_options = raw_create_options, |
1154 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1155 |
|
1156 |
.bdrv_aio_readv = raw_aio_readv, |
1157 |
.bdrv_aio_writev = raw_aio_writev, |
1158 |
.bdrv_aio_flush = raw_aio_flush, |
1159 |
|
1160 |
.bdrv_truncate = raw_truncate, |
1161 |
.bdrv_getlength = raw_getlength, |
1162 |
.bdrv_get_allocated_file_size |
1163 |
= raw_get_allocated_file_size, |
1164 |
|
1165 |
/* removable device support */
|
1166 |
.bdrv_is_inserted = floppy_is_inserted, |
1167 |
.bdrv_media_changed = floppy_media_changed, |
1168 |
.bdrv_eject = floppy_eject, |
1169 |
}; |
1170 |
|
1171 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1172 |
{ |
1173 |
BDRVRawState *s = bs->opaque; |
1174 |
|
1175 |
s->type = FTYPE_CD; |
1176 |
|
1177 |
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
|
1178 |
return raw_open_common(bs, filename, flags, O_NONBLOCK);
|
1179 |
} |
1180 |
|
1181 |
static int cdrom_probe_device(const char *filename) |
1182 |
{ |
1183 |
int fd, ret;
|
1184 |
int prio = 0; |
1185 |
struct stat st;
|
1186 |
|
1187 |
fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
1188 |
if (fd < 0) { |
1189 |
goto out;
|
1190 |
} |
1191 |
ret = fstat(fd, &st); |
1192 |
if (ret == -1 || !S_ISBLK(st.st_mode)) { |
1193 |
goto outc;
|
1194 |
} |
1195 |
|
1196 |
/* Attempt to detect via a CDROM specific ioctl */
|
1197 |
ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1198 |
if (ret >= 0) |
1199 |
prio = 100;
|
1200 |
|
1201 |
outc:
|
1202 |
qemu_close(fd); |
1203 |
out:
|
1204 |
return prio;
|
1205 |
} |
1206 |
|
1207 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1208 |
{ |
1209 |
BDRVRawState *s = bs->opaque; |
1210 |
int ret;
|
1211 |
|
1212 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1213 |
if (ret == CDS_DISC_OK)
|
1214 |
return 1; |
1215 |
return 0; |
1216 |
} |
1217 |
|
1218 |
static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
1219 |
{ |
1220 |
BDRVRawState *s = bs->opaque; |
1221 |
|
1222 |
if (eject_flag) {
|
1223 |
if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
1224 |
perror("CDROMEJECT");
|
1225 |
} else {
|
1226 |
if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
1227 |
perror("CDROMEJECT");
|
1228 |
} |
1229 |
} |
1230 |
|
1231 |
static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
1232 |
{ |
1233 |
BDRVRawState *s = bs->opaque; |
1234 |
|
1235 |
if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1236 |
/*
|
1237 |
* Note: an error can happen if the distribution automatically
|
1238 |
* mounts the CD-ROM
|
1239 |
*/
|
1240 |
/* perror("CDROM_LOCKDOOR"); */
|
1241 |
} |
1242 |
} |
1243 |
|
1244 |
static BlockDriver bdrv_host_cdrom = {
|
1245 |
.format_name = "host_cdrom",
|
1246 |
.protocol_name = "host_cdrom",
|
1247 |
.instance_size = sizeof(BDRVRawState),
|
1248 |
.bdrv_probe_device = cdrom_probe_device, |
1249 |
.bdrv_file_open = cdrom_open, |
1250 |
.bdrv_close = raw_close, |
1251 |
.bdrv_create = hdev_create, |
1252 |
.create_options = raw_create_options, |
1253 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1254 |
|
1255 |
.bdrv_aio_readv = raw_aio_readv, |
1256 |
.bdrv_aio_writev = raw_aio_writev, |
1257 |
.bdrv_aio_flush = raw_aio_flush, |
1258 |
|
1259 |
.bdrv_truncate = raw_truncate, |
1260 |
.bdrv_getlength = raw_getlength, |
1261 |
.bdrv_get_allocated_file_size |
1262 |
= raw_get_allocated_file_size, |
1263 |
|
1264 |
/* removable device support */
|
1265 |
.bdrv_is_inserted = cdrom_is_inserted, |
1266 |
.bdrv_eject = cdrom_eject, |
1267 |
.bdrv_lock_medium = cdrom_lock_medium, |
1268 |
|
1269 |
/* generic scsi device */
|
1270 |
.bdrv_ioctl = hdev_ioctl, |
1271 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1272 |
}; |
1273 |
#endif /* __linux__ */ |
1274 |
|
1275 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1276 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1277 |
{ |
1278 |
BDRVRawState *s = bs->opaque; |
1279 |
int ret;
|
1280 |
|
1281 |
s->type = FTYPE_CD; |
1282 |
|
1283 |
ret = raw_open_common(bs, filename, flags, 0);
|
1284 |
if (ret)
|
1285 |
return ret;
|
1286 |
|
1287 |
/* make sure the door isn't locked at this time */
|
1288 |
ioctl(s->fd, CDIOCALLOW); |
1289 |
return 0; |
1290 |
} |
1291 |
|
1292 |
static int cdrom_probe_device(const char *filename) |
1293 |
{ |
1294 |
if (strstart(filename, "/dev/cd", NULL) || |
1295 |
strstart(filename, "/dev/acd", NULL)) |
1296 |
return 100; |
1297 |
return 0; |
1298 |
} |
1299 |
|
1300 |
static int cdrom_reopen(BlockDriverState *bs) |
1301 |
{ |
1302 |
BDRVRawState *s = bs->opaque; |
1303 |
int fd;
|
1304 |
|
1305 |
/*
|
1306 |
* Force reread of possibly changed/newly loaded disc,
|
1307 |
* FreeBSD seems to not notice sometimes...
|
1308 |
*/
|
1309 |
if (s->fd >= 0) |
1310 |
qemu_close(s->fd); |
1311 |
fd = qemu_open(bs->filename, s->open_flags, 0644);
|
1312 |
if (fd < 0) { |
1313 |
s->fd = -1;
|
1314 |
return -EIO;
|
1315 |
} |
1316 |
s->fd = fd; |
1317 |
|
1318 |
/* make sure the door isn't locked at this time */
|
1319 |
ioctl(s->fd, CDIOCALLOW); |
1320 |
return 0; |
1321 |
} |
1322 |
|
1323 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1324 |
{ |
1325 |
return raw_getlength(bs) > 0; |
1326 |
} |
1327 |
|
1328 |
static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
1329 |
{ |
1330 |
BDRVRawState *s = bs->opaque; |
1331 |
|
1332 |
if (s->fd < 0) |
1333 |
return;
|
1334 |
|
1335 |
(void) ioctl(s->fd, CDIOCALLOW);
|
1336 |
|
1337 |
if (eject_flag) {
|
1338 |
if (ioctl(s->fd, CDIOCEJECT) < 0) |
1339 |
perror("CDIOCEJECT");
|
1340 |
} else {
|
1341 |
if (ioctl(s->fd, CDIOCCLOSE) < 0) |
1342 |
perror("CDIOCCLOSE");
|
1343 |
} |
1344 |
|
1345 |
cdrom_reopen(bs); |
1346 |
} |
1347 |
|
1348 |
static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
1349 |
{ |
1350 |
BDRVRawState *s = bs->opaque; |
1351 |
|
1352 |
if (s->fd < 0) |
1353 |
return;
|
1354 |
if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
1355 |
/*
|
1356 |
* Note: an error can happen if the distribution automatically
|
1357 |
* mounts the CD-ROM
|
1358 |
*/
|
1359 |
/* perror("CDROM_LOCKDOOR"); */
|
1360 |
} |
1361 |
} |
1362 |
|
1363 |
static BlockDriver bdrv_host_cdrom = {
|
1364 |
.format_name = "host_cdrom",
|
1365 |
.protocol_name = "host_cdrom",
|
1366 |
.instance_size = sizeof(BDRVRawState),
|
1367 |
.bdrv_probe_device = cdrom_probe_device, |
1368 |
.bdrv_file_open = cdrom_open, |
1369 |
.bdrv_close = raw_close, |
1370 |
.bdrv_create = hdev_create, |
1371 |
.create_options = raw_create_options, |
1372 |
.bdrv_has_zero_init = hdev_has_zero_init, |
1373 |
|
1374 |
.bdrv_aio_readv = raw_aio_readv, |
1375 |
.bdrv_aio_writev = raw_aio_writev, |
1376 |
.bdrv_aio_flush = raw_aio_flush, |
1377 |
|
1378 |
.bdrv_truncate = raw_truncate, |
1379 |
.bdrv_getlength = raw_getlength, |
1380 |
.bdrv_get_allocated_file_size |
1381 |
= raw_get_allocated_file_size, |
1382 |
|
1383 |
/* removable device support */
|
1384 |
.bdrv_is_inserted = cdrom_is_inserted, |
1385 |
.bdrv_eject = cdrom_eject, |
1386 |
.bdrv_lock_medium = cdrom_lock_medium, |
1387 |
}; |
1388 |
#endif /* __FreeBSD__ */ |
1389 |
|
1390 |
static void bdrv_file_init(void) |
1391 |
{ |
1392 |
/*
|
1393 |
* Register all the drivers. Note that order is important, the driver
|
1394 |
* registered last will get probed first.
|
1395 |
*/
|
1396 |
bdrv_register(&bdrv_file); |
1397 |
bdrv_register(&bdrv_host_device); |
1398 |
#ifdef __linux__
|
1399 |
bdrv_register(&bdrv_host_floppy); |
1400 |
bdrv_register(&bdrv_host_cdrom); |
1401 |
#endif
|
1402 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1403 |
bdrv_register(&bdrv_host_cdrom); |
1404 |
#endif
|
1405 |
} |
1406 |
|
1407 |
block_init(bdrv_file_init); |