version 1.1.1.7, 2018/04/24 16:50:42
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version 1.1.1.13, 2018/04/24 17:20:50
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Line 22
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Line 22
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* THE SOFTWARE. |
* THE SOFTWARE. |
*/ |
*/ |
#include "config-host.h" |
#include "config-host.h" |
#ifdef _BSD |
#ifdef HOST_BSD |
/* include native header before sys-queue.h */ |
/* include native header before sys-queue.h */ |
#include <sys/queue.h> |
#include <sys/queue.h> |
#endif |
#endif |
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#include "qemu-common.h" |
#include "qemu-common.h" |
#include "console.h" |
#include "monitor.h" |
#include "block_int.h" |
#include "block_int.h" |
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#include "module.h" |
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#ifdef _BSD |
#ifdef HOST_BSD |
#include <sys/types.h> |
#include <sys/types.h> |
#include <sys/stat.h> |
#include <sys/stat.h> |
#include <sys/ioctl.h> |
#include <sys/ioctl.h> |
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#ifndef __DragonFly__ |
#include <sys/disk.h> |
#include <sys/disk.h> |
#endif |
#endif |
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#endif |
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#ifdef _WIN32 |
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#include <windows.h> |
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#endif |
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#define SECTOR_BITS 9 |
#define SECTOR_BITS 9 |
#define SECTOR_SIZE (1 << SECTOR_BITS) |
#define SECTOR_SIZE (1 << SECTOR_BITS) |
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typedef struct BlockDriverAIOCBSync { |
static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, |
BlockDriverAIOCB common; |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
QEMUBH *bh; |
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int ret; |
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} BlockDriverAIOCBSync; |
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static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
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int64_t sector_num, uint8_t *buf, int nb_sectors, |
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BlockDriverCompletionFunc *cb, void *opaque); |
BlockDriverCompletionFunc *cb, void *opaque); |
static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
BlockDriverCompletionFunc *cb, void *opaque); |
BlockDriverCompletionFunc *cb, void *opaque); |
static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
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static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
uint8_t *buf, int nb_sectors); |
uint8_t *buf, int nb_sectors); |
static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
Line 127 void path_combine(char *dest, int dest_s
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Line 127 void path_combine(char *dest, int dest_s
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} |
} |
} |
} |
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void bdrv_register(BlockDriver *bdrv) |
static void bdrv_register(BlockDriver *bdrv) |
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{ |
{ |
if (!bdrv->bdrv_aio_read) { |
if (!bdrv->bdrv_aio_readv) { |
/* add AIO emulation layer */ |
/* add AIO emulation layer */ |
bdrv->bdrv_aio_read = bdrv_aio_read_em; |
bdrv->bdrv_aio_readv = bdrv_aio_readv_em; |
bdrv->bdrv_aio_write = bdrv_aio_write_em; |
bdrv->bdrv_aio_writev = bdrv_aio_writev_em; |
bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; |
} else if (!bdrv->bdrv_read) { |
bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync); |
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} else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
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/* add synchronous IO emulation layer */ |
/* add synchronous IO emulation layer */ |
bdrv->bdrv_read = bdrv_read_em; |
bdrv->bdrv_read = bdrv_read_em; |
bdrv->bdrv_write = bdrv_write_em; |
bdrv->bdrv_write = bdrv_write_em; |
Line 172 BlockDriver *bdrv_find_format(const char
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Line 169 BlockDriver *bdrv_find_format(const char
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return NULL; |
return NULL; |
} |
} |
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int bdrv_create(BlockDriver *drv, |
int bdrv_create(BlockDriver *drv, const char* filename, |
const char *filename, int64_t size_in_sectors, |
QEMUOptionParameter *options) |
const char *backing_file, int flags) |
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{ |
{ |
if (!drv->bdrv_create) |
if (!drv->bdrv_create) |
return -ENOTSUP; |
return -ENOTSUP; |
return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); |
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return drv->bdrv_create(filename, options); |
} |
} |
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#ifdef _WIN32 |
#ifdef _WIN32 |
Line 212 static int is_windows_drive_prefix(const
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Line 209 static int is_windows_drive_prefix(const
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filename[1] == ':'); |
filename[1] == ':'); |
} |
} |
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static int is_windows_drive(const char *filename) |
int is_windows_drive(const char *filename) |
{ |
{ |
if (is_windows_drive_prefix(filename) && |
if (is_windows_drive_prefix(filename) && |
filename[2] == '\0') |
filename[2] == '\0') |
Line 234 static BlockDriver *find_protocol(const
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Line 231 static BlockDriver *find_protocol(const
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#ifdef _WIN32 |
#ifdef _WIN32 |
if (is_windows_drive(filename) || |
if (is_windows_drive(filename) || |
is_windows_drive_prefix(filename)) |
is_windows_drive_prefix(filename)) |
return &bdrv_raw; |
return bdrv_find_format("raw"); |
#endif |
#endif |
p = strchr(filename, ':'); |
p = strchr(filename, ':'); |
if (!p) |
if (!p) |
return &bdrv_raw; |
return bdrv_find_format("raw"); |
len = p - filename; |
len = p - filename; |
if (len > sizeof(protocol) - 1) |
if (len > sizeof(protocol) - 1) |
len = sizeof(protocol) - 1; |
len = sizeof(protocol) - 1; |
Line 252 static BlockDriver *find_protocol(const
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Line 249 static BlockDriver *find_protocol(const
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return NULL; |
return NULL; |
} |
} |
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/* XXX: force raw format if block or character device ? It would |
/* |
simplify the BSD case */ |
* Detect host devices. By convention, /dev/cdrom[N] is always |
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* recognized as a host CDROM. |
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*/ |
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static BlockDriver *find_hdev_driver(const char *filename) |
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{ |
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int score_max = 0, score; |
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BlockDriver *drv = NULL, *d; |
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for (d = first_drv; d; d = d->next) { |
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if (d->bdrv_probe_device) { |
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score = d->bdrv_probe_device(filename); |
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if (score > score_max) { |
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score_max = score; |
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drv = d; |
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} |
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} |
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} |
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return drv; |
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} |
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static BlockDriver *find_image_format(const char *filename) |
static BlockDriver *find_image_format(const char *filename) |
{ |
{ |
int ret, score, score_max; |
int ret, score, score_max; |
Line 261 static BlockDriver *find_image_format(co
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Line 278 static BlockDriver *find_image_format(co
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uint8_t buf[2048]; |
uint8_t buf[2048]; |
BlockDriverState *bs; |
BlockDriverState *bs; |
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/* detect host devices. By convention, /dev/cdrom[N] is always |
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recognized as a host CDROM */ |
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if (strstart(filename, "/dev/cdrom", NULL)) |
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return &bdrv_host_device; |
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#ifdef _WIN32 |
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if (is_windows_drive(filename)) |
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return &bdrv_host_device; |
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#else |
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{ |
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struct stat st; |
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if (stat(filename, &st) >= 0 && |
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(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
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return &bdrv_host_device; |
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} |
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} |
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#endif |
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drv = find_protocol(filename); |
drv = find_protocol(filename); |
/* no need to test disk image formats for vvfat */ |
/* no need to test disk image formats for vvfat */ |
if (drv == &bdrv_vvfat) |
if (drv && strcmp(drv->format_name, "vvfat") == 0) |
return drv; |
return drv; |
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ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
Line 311 int bdrv_file_open(BlockDriverState **pb
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Line 311 int bdrv_file_open(BlockDriverState **pb
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int ret; |
int ret; |
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bs = bdrv_new(""); |
bs = bdrv_new(""); |
if (!bs) |
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return -ENOMEM; |
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ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
if (ret < 0) { |
if (ret < 0) { |
bdrv_delete(bs); |
bdrv_delete(bs); |
Line 338 int bdrv_open2(BlockDriverState *bs, con
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Line 336 int bdrv_open2(BlockDriverState *bs, con
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bs->read_only = 0; |
bs->read_only = 0; |
bs->is_temporary = 0; |
bs->is_temporary = 0; |
bs->encrypted = 0; |
bs->encrypted = 0; |
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bs->valid_key = 0; |
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/* buffer_alignment defaulted to 512, drivers can change this value */ |
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bs->buffer_alignment = 512; |
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if (flags & BDRV_O_SNAPSHOT) { |
if (flags & BDRV_O_SNAPSHOT) { |
BlockDriverState *bs1; |
BlockDriverState *bs1; |
int64_t total_size; |
int64_t total_size; |
int is_protocol = 0; |
int is_protocol = 0; |
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BlockDriver *bdrv_qcow2; |
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QEMUOptionParameter *options; |
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/* if snapshot, we create a temporary backing file and open it |
/* if snapshot, we create a temporary backing file and open it |
instead of opening 'filename' directly */ |
instead of opening 'filename' directly */ |
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/* if there is a backing file, use it */ |
/* if there is a backing file, use it */ |
bs1 = bdrv_new(""); |
bs1 = bdrv_new(""); |
if (!bs1) { |
ret = bdrv_open2(bs1, filename, 0, drv); |
return -ENOMEM; |
if (ret < 0) { |
} |
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if (bdrv_open(bs1, filename, 0) < 0) { |
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bdrv_delete(bs1); |
bdrv_delete(bs1); |
return -1; |
return ret; |
} |
} |
total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
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Line 372 int bdrv_open2(BlockDriverState *bs, con
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Line 373 int bdrv_open2(BlockDriverState *bs, con
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else |
else |
realpath(filename, backing_filename); |
realpath(filename, backing_filename); |
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if (bdrv_create(&bdrv_qcow2, tmp_filename, |
bdrv_qcow2 = bdrv_find_format("qcow2"); |
total_size, backing_filename, 0) < 0) { |
options = parse_option_parameters("", bdrv_qcow2->create_options, NULL); |
return -1; |
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set_option_parameter_int(options, BLOCK_OPT_SIZE, total_size * 512); |
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set_option_parameter(options, BLOCK_OPT_BACKING_FILE, backing_filename); |
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if (drv) { |
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set_option_parameter(options, BLOCK_OPT_BACKING_FMT, |
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drv->format_name); |
} |
} |
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ret = bdrv_create(bdrv_qcow2, tmp_filename, options); |
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if (ret < 0) { |
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return ret; |
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} |
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filename = tmp_filename; |
filename = tmp_filename; |
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drv = bdrv_qcow2; |
bs->is_temporary = 1; |
bs->is_temporary = 1; |
} |
} |
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pstrcpy(bs->filename, sizeof(bs->filename), filename); |
pstrcpy(bs->filename, sizeof(bs->filename), filename); |
if (flags & BDRV_O_FILE) { |
if (flags & BDRV_O_FILE) { |
drv = find_protocol(filename); |
drv = find_protocol(filename); |
if (!drv) |
} else if (!drv) { |
return -ENOENT; |
drv = find_hdev_driver(filename); |
} else { |
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if (!drv) { |
if (!drv) { |
drv = find_image_format(filename); |
drv = find_image_format(filename); |
if (!drv) |
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return -1; |
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} |
} |
} |
} |
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if (!drv) { |
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ret = -ENOENT; |
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goto unlink_and_fail; |
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} |
bs->drv = drv; |
bs->drv = drv; |
bs->opaque = qemu_mallocz(drv->instance_size); |
bs->opaque = qemu_mallocz(drv->instance_size); |
/* Note: for compatibility, we open disk image files as RDWR, and |
/* Note: for compatibility, we open disk image files as RDWR, and |
Line 409 int bdrv_open2(BlockDriverState *bs, con
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Line 423 int bdrv_open2(BlockDriverState *bs, con
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qemu_free(bs->opaque); |
qemu_free(bs->opaque); |
bs->opaque = NULL; |
bs->opaque = NULL; |
bs->drv = NULL; |
bs->drv = NULL; |
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unlink_and_fail: |
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if (bs->is_temporary) |
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unlink(filename); |
return ret; |
return ret; |
} |
} |
if (drv->bdrv_getlength) { |
if (drv->bdrv_getlength) { |
Line 421 int bdrv_open2(BlockDriverState *bs, con
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Line 438 int bdrv_open2(BlockDriverState *bs, con
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#endif |
#endif |
if (bs->backing_file[0] != '\0') { |
if (bs->backing_file[0] != '\0') { |
/* if there is a backing file, use it */ |
/* if there is a backing file, use it */ |
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BlockDriver *back_drv = NULL; |
bs->backing_hd = bdrv_new(""); |
bs->backing_hd = bdrv_new(""); |
if (!bs->backing_hd) { |
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fail: |
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bdrv_close(bs); |
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return -ENOMEM; |
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} |
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path_combine(backing_filename, sizeof(backing_filename), |
path_combine(backing_filename, sizeof(backing_filename), |
filename, bs->backing_file); |
filename, bs->backing_file); |
if (bdrv_open(bs->backing_hd, backing_filename, open_flags) < 0) |
if (bs->backing_format[0] != '\0') |
goto fail; |
back_drv = bdrv_find_format(bs->backing_format); |
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ret = bdrv_open2(bs->backing_hd, backing_filename, open_flags, |
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back_drv); |
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if (ret < 0) { |
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bdrv_close(bs); |
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return ret; |
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} |
} |
} |
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/* call the change callback */ |
if (!bdrv_key_required(bs)) { |
bs->media_changed = 1; |
/* call the change callback */ |
if (bs->change_cb) |
bs->media_changed = 1; |
bs->change_cb(bs->change_opaque); |
if (bs->change_cb) |
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bs->change_cb(bs->change_opaque); |
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} |
return 0; |
return 0; |
} |
} |
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Line 477 void bdrv_delete(BlockDriverState *bs)
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Line 497 void bdrv_delete(BlockDriverState *bs)
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qemu_free(bs); |
qemu_free(bs); |
} |
} |
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/* |
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* Run consistency checks on an image |
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* |
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* Returns the number of errors or -errno when an internal error occurs |
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*/ |
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int bdrv_check(BlockDriverState *bs) |
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{ |
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if (bs->drv->bdrv_check == NULL) { |
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return -ENOTSUP; |
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} |
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return bs->drv->bdrv_check(bs); |
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} |
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/* commit COW file into the raw image */ |
/* commit COW file into the raw image */ |
int bdrv_commit(BlockDriverState *bs) |
int bdrv_commit(BlockDriverState *bs) |
{ |
{ |
Line 533 static int bdrv_check_byte_request(Block
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Line 567 static int bdrv_check_byte_request(Block
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len = bdrv_getlength(bs); |
len = bdrv_getlength(bs); |
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if ((offset + size) > len) |
if (offset < 0) |
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return -EIO; |
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if ((offset > len) || (len - offset < size)) |
return -EIO; |
return -EIO; |
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return 0; |
return 0; |
Line 542 static int bdrv_check_byte_request(Block
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Line 579 static int bdrv_check_byte_request(Block
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static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, |
static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, |
int nb_sectors) |
int nb_sectors) |
{ |
{ |
int64_t offset; |
return bdrv_check_byte_request(bs, sector_num * 512, nb_sectors * 512); |
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/* Deal with byte accesses */ |
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if (sector_num < 0) |
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offset = -sector_num; |
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else |
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offset = sector_num * 512; |
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return bdrv_check_byte_request(bs, offset, nb_sectors * 512); |
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} |
} |
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/* return < 0 if error. See bdrv_write() for the return codes */ |
/* return < 0 if error. See bdrv_write() for the return codes */ |
Line 564 int bdrv_read(BlockDriverState *bs, int6
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Line 593 int bdrv_read(BlockDriverState *bs, int6
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if (bdrv_check_request(bs, sector_num, nb_sectors)) |
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
return -EIO; |
return -EIO; |
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if (drv->bdrv_pread) { |
return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
int ret, len; |
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len = nb_sectors * 512; |
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ret = drv->bdrv_pread(bs, sector_num * 512, buf, len); |
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if (ret < 0) |
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return ret; |
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else if (ret != len) |
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return -EINVAL; |
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else { |
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bs->rd_bytes += (unsigned) len; |
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bs->rd_ops ++; |
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return 0; |
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} |
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} else { |
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return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
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} |
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} |
} |
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/* Return < 0 if error. Important errors are: |
/* Return < 0 if error. Important errors are: |
Line 599 int bdrv_write(BlockDriverState *bs, int
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Line 613 int bdrv_write(BlockDriverState *bs, int
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if (bdrv_check_request(bs, sector_num, nb_sectors)) |
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
return -EIO; |
return -EIO; |
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if (drv->bdrv_pwrite) { |
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int ret, len, count = 0; |
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len = nb_sectors * 512; |
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do { |
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ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len - count); |
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if (ret < 0) { |
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printf("bdrv_write ret=%d\n", ret); |
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return ret; |
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} |
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count += ret; |
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buf += ret; |
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} while (count != len); |
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bs->wr_bytes += (unsigned) len; |
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bs->wr_ops ++; |
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return 0; |
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} |
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return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
} |
} |
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static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
int bdrv_pread(BlockDriverState *bs, int64_t offset, |
uint8_t *buf, int count1) |
void *buf, int count1) |
{ |
{ |
uint8_t tmp_buf[SECTOR_SIZE]; |
uint8_t tmp_buf[SECTOR_SIZE]; |
int len, nb_sectors, count; |
int len, nb_sectors, count; |
Line 662 static int bdrv_pread_em(BlockDriverStat
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Line 660 static int bdrv_pread_em(BlockDriverStat
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return count1; |
return count1; |
} |
} |
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static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
const uint8_t *buf, int count1) |
const void *buf, int count1) |
{ |
{ |
uint8_t tmp_buf[SECTOR_SIZE]; |
uint8_t tmp_buf[SECTOR_SIZE]; |
int len, nb_sectors, count; |
int len, nb_sectors, count; |
Line 711 static int bdrv_pwrite_em(BlockDriverSta
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Line 709 static int bdrv_pwrite_em(BlockDriverSta
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} |
} |
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/** |
/** |
* Read with byte offsets (needed only for file protocols) |
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*/ |
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int bdrv_pread(BlockDriverState *bs, int64_t offset, |
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void *buf1, int count1) |
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{ |
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BlockDriver *drv = bs->drv; |
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if (!drv) |
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return -ENOMEDIUM; |
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if (bdrv_check_byte_request(bs, offset, count1)) |
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return -EIO; |
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|
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if (!drv->bdrv_pread) |
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return bdrv_pread_em(bs, offset, buf1, count1); |
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return drv->bdrv_pread(bs, offset, buf1, count1); |
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} |
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/** |
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* Write with byte offsets (needed only for file protocols) |
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*/ |
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int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
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const void *buf1, int count1) |
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{ |
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BlockDriver *drv = bs->drv; |
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if (!drv) |
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return -ENOMEDIUM; |
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if (bdrv_check_byte_request(bs, offset, count1)) |
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return -EIO; |
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|
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if (!drv->bdrv_pwrite) |
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return bdrv_pwrite_em(bs, offset, buf1, count1); |
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return drv->bdrv_pwrite(bs, offset, buf1, count1); |
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} |
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/** |
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* Truncate file to 'offset' bytes (needed only for file protocols) |
* Truncate file to 'offset' bytes (needed only for file protocols) |
*/ |
*/ |
int bdrv_truncate(BlockDriverState *bs, int64_t offset) |
int bdrv_truncate(BlockDriverState *bs, int64_t offset) |
Line 970 int bdrv_is_encrypted(BlockDriverState *
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Line 932 int bdrv_is_encrypted(BlockDriverState *
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return bs->encrypted; |
return bs->encrypted; |
} |
} |
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int bdrv_key_required(BlockDriverState *bs) |
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{ |
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BlockDriverState *backing_hd = bs->backing_hd; |
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|
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if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key) |
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return 1; |
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return (bs->encrypted && !bs->valid_key); |
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} |
|
|
int bdrv_set_key(BlockDriverState *bs, const char *key) |
int bdrv_set_key(BlockDriverState *bs, const char *key) |
{ |
{ |
int ret; |
int ret; |
Line 982 int bdrv_set_key(BlockDriverState *bs, c
|
Line 953 int bdrv_set_key(BlockDriverState *bs, c
|
} |
} |
if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) |
if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) |
return -1; |
return -1; |
return bs->drv->bdrv_set_key(bs, key); |
ret = bs->drv->bdrv_set_key(bs, key); |
|
if (ret < 0) { |
|
bs->valid_key = 0; |
|
} else if (!bs->valid_key) { |
|
bs->valid_key = 1; |
|
/* call the change callback now, we skipped it on open */ |
|
bs->media_changed = 1; |
|
if (bs->change_cb) |
|
bs->change_cb(bs->change_opaque); |
|
} |
|
return ret; |
} |
} |
|
|
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
Line 1015 BlockDriverState *bdrv_find(const char *
|
Line 996 BlockDriverState *bdrv_find(const char *
|
return NULL; |
return NULL; |
} |
} |
|
|
void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
{ |
{ |
BlockDriverState *bs; |
BlockDriverState *bs; |
|
|
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
it(opaque, bs->device_name); |
it(opaque, bs); |
} |
} |
} |
} |
|
|
Line 1031 const char *bdrv_get_device_name(BlockDr
|
Line 1012 const char *bdrv_get_device_name(BlockDr
|
|
|
void bdrv_flush(BlockDriverState *bs) |
void bdrv_flush(BlockDriverState *bs) |
{ |
{ |
|
if (!bs->drv) |
|
return; |
if (bs->drv->bdrv_flush) |
if (bs->drv->bdrv_flush) |
bs->drv->bdrv_flush(bs); |
bs->drv->bdrv_flush(bs); |
if (bs->backing_hd) |
if (bs->backing_hd) |
Line 1074 int bdrv_is_allocated(BlockDriverState *
|
Line 1057 int bdrv_is_allocated(BlockDriverState *
|
return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); |
return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); |
} |
} |
|
|
void bdrv_info(void) |
void bdrv_info(Monitor *mon) |
{ |
{ |
BlockDriverState *bs; |
BlockDriverState *bs; |
|
|
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
term_printf("%s:", bs->device_name); |
monitor_printf(mon, "%s:", bs->device_name); |
term_printf(" type="); |
monitor_printf(mon, " type="); |
switch(bs->type) { |
switch(bs->type) { |
case BDRV_TYPE_HD: |
case BDRV_TYPE_HD: |
term_printf("hd"); |
monitor_printf(mon, "hd"); |
break; |
break; |
case BDRV_TYPE_CDROM: |
case BDRV_TYPE_CDROM: |
term_printf("cdrom"); |
monitor_printf(mon, "cdrom"); |
break; |
break; |
case BDRV_TYPE_FLOPPY: |
case BDRV_TYPE_FLOPPY: |
term_printf("floppy"); |
monitor_printf(mon, "floppy"); |
break; |
break; |
} |
} |
term_printf(" removable=%d", bs->removable); |
monitor_printf(mon, " removable=%d", bs->removable); |
if (bs->removable) { |
if (bs->removable) { |
term_printf(" locked=%d", bs->locked); |
monitor_printf(mon, " locked=%d", bs->locked); |
} |
} |
if (bs->drv) { |
if (bs->drv) { |
term_printf(" file="); |
monitor_printf(mon, " file="); |
term_print_filename(bs->filename); |
monitor_print_filename(mon, bs->filename); |
if (bs->backing_file[0] != '\0') { |
if (bs->backing_file[0] != '\0') { |
term_printf(" backing_file="); |
monitor_printf(mon, " backing_file="); |
term_print_filename(bs->backing_file); |
monitor_print_filename(mon, bs->backing_file); |
} |
} |
term_printf(" ro=%d", bs->read_only); |
monitor_printf(mon, " ro=%d", bs->read_only); |
term_printf(" drv=%s", bs->drv->format_name); |
monitor_printf(mon, " drv=%s", bs->drv->format_name); |
if (bs->encrypted) |
monitor_printf(mon, " encrypted=%d", bdrv_is_encrypted(bs)); |
term_printf(" encrypted"); |
|
} else { |
} else { |
term_printf(" [not inserted]"); |
monitor_printf(mon, " [not inserted]"); |
} |
} |
term_printf("\n"); |
monitor_printf(mon, "\n"); |
} |
} |
} |
} |
|
|
/* The "info blockstats" command. */ |
/* The "info blockstats" command. */ |
void bdrv_info_stats (void) |
void bdrv_info_stats(Monitor *mon) |
{ |
{ |
BlockDriverState *bs; |
BlockDriverState *bs; |
BlockDriverInfo bdi; |
|
|
|
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
term_printf ("%s:" |
monitor_printf(mon, "%s:" |
" rd_bytes=%" PRIu64 |
" rd_bytes=%" PRIu64 |
" wr_bytes=%" PRIu64 |
" wr_bytes=%" PRIu64 |
" rd_operations=%" PRIu64 |
" rd_operations=%" PRIu64 |
" wr_operations=%" PRIu64 |
" wr_operations=%" PRIu64 |
, |
"\n", |
bs->device_name, |
bs->device_name, |
bs->rd_bytes, bs->wr_bytes, |
bs->rd_bytes, bs->wr_bytes, |
bs->rd_ops, bs->wr_ops); |
bs->rd_ops, bs->wr_ops); |
if (bdrv_get_info(bs, &bdi) == 0) |
|
term_printf(" high=%" PRId64 |
|
" bytes_free=%" PRId64, |
|
bdi.highest_alloc, bdi.num_free_bytes); |
|
term_printf("\n"); |
|
} |
} |
} |
} |
|
|
|
const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
|
{ |
|
if (bs->backing_hd && bs->backing_hd->encrypted) |
|
return bs->backing_file; |
|
else if (bs->encrypted) |
|
return bs->filename; |
|
else |
|
return NULL; |
|
} |
|
|
void bdrv_get_backing_filename(BlockDriverState *bs, |
void bdrv_get_backing_filename(BlockDriverState *bs, |
char *filename, int filename_size) |
char *filename, int filename_size) |
{ |
{ |
Line 1156 int bdrv_write_compressed(BlockDriverSta
|
Line 1142 int bdrv_write_compressed(BlockDriverSta
|
return -ENOMEDIUM; |
return -ENOMEDIUM; |
if (!drv->bdrv_write_compressed) |
if (!drv->bdrv_write_compressed) |
return -ENOTSUP; |
return -ENOTSUP; |
|
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
|
return -EIO; |
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
} |
} |
|
|
Line 1170 int bdrv_get_info(BlockDriverState *bs,
|
Line 1158 int bdrv_get_info(BlockDriverState *bs,
|
return drv->bdrv_get_info(bs, bdi); |
return drv->bdrv_get_info(bs, bdi); |
} |
} |
|
|
|
int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, |
|
int64_t pos, int size) |
|
{ |
|
BlockDriver *drv = bs->drv; |
|
if (!drv) |
|
return -ENOMEDIUM; |
|
if (!drv->bdrv_save_vmstate) |
|
return -ENOTSUP; |
|
return drv->bdrv_save_vmstate(bs, buf, pos, size); |
|
} |
|
|
|
int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, |
|
int64_t pos, int size) |
|
{ |
|
BlockDriver *drv = bs->drv; |
|
if (!drv) |
|
return -ENOMEDIUM; |
|
if (!drv->bdrv_load_vmstate) |
|
return -ENOTSUP; |
|
return drv->bdrv_load_vmstate(bs, buf, pos, size); |
|
} |
|
|
/**************************************************************/ |
/**************************************************************/ |
/* handling of snapshots */ |
/* handling of snapshots */ |
|
|
Line 1293 char *bdrv_snapshot_dump(char *buf, int
|
Line 1303 char *bdrv_snapshot_dump(char *buf, int
|
/**************************************************************/ |
/**************************************************************/ |
/* async I/Os */ |
/* async I/Os */ |
|
|
typedef struct VectorTranslationState { |
|
QEMUIOVector *iov; |
|
uint8_t *bounce; |
|
int is_write; |
|
BlockDriverAIOCB *aiocb; |
|
BlockDriverAIOCB *this_aiocb; |
|
} VectorTranslationState; |
|
|
|
static void bdrv_aio_rw_vector_cb(void *opaque, int ret) |
|
{ |
|
VectorTranslationState *s = opaque; |
|
|
|
if (!s->is_write) { |
|
qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size); |
|
} |
|
qemu_vfree(s->bounce); |
|
s->this_aiocb->cb(s->this_aiocb->opaque, ret); |
|
qemu_aio_release(s->this_aiocb); |
|
} |
|
|
|
static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, |
|
int64_t sector_num, |
|
QEMUIOVector *iov, |
|
int nb_sectors, |
|
BlockDriverCompletionFunc *cb, |
|
void *opaque, |
|
int is_write) |
|
|
|
{ |
|
VectorTranslationState *s = qemu_mallocz(sizeof(*s)); |
|
BlockDriverAIOCB *aiocb = qemu_aio_get(bs, cb, opaque); |
|
|
|
s->this_aiocb = aiocb; |
|
s->iov = iov; |
|
s->bounce = qemu_memalign(512, nb_sectors * 512); |
|
s->is_write = is_write; |
|
if (is_write) { |
|
qemu_iovec_to_buffer(s->iov, s->bounce); |
|
s->aiocb = bdrv_aio_write(bs, sector_num, s->bounce, nb_sectors, |
|
bdrv_aio_rw_vector_cb, s); |
|
} else { |
|
s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors, |
|
bdrv_aio_rw_vector_cb, s); |
|
} |
|
return aiocb; |
|
} |
|
|
|
BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
QEMUIOVector *iov, int nb_sectors, |
QEMUIOVector *qiov, int nb_sectors, |
BlockDriverCompletionFunc *cb, void *opaque) |
BlockDriverCompletionFunc *cb, void *opaque) |
{ |
{ |
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
|
return NULL; |
|
|
|
return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
|
cb, opaque, 0); |
|
} |
|
|
|
BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
|
QEMUIOVector *iov, int nb_sectors, |
|
BlockDriverCompletionFunc *cb, void *opaque) |
|
{ |
|
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
|
return NULL; |
|
|
|
return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
|
cb, opaque, 1); |
|
} |
|
|
|
BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
|
uint8_t *buf, int nb_sectors, |
|
BlockDriverCompletionFunc *cb, void *opaque) |
|
{ |
|
BlockDriver *drv = bs->drv; |
BlockDriver *drv = bs->drv; |
BlockDriverAIOCB *ret; |
BlockDriverAIOCB *ret; |
|
|
Line 1374 BlockDriverAIOCB *bdrv_aio_read(BlockDri
|
Line 1315 BlockDriverAIOCB *bdrv_aio_read(BlockDri
|
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
return NULL; |
return NULL; |
|
|
ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
ret = drv->bdrv_aio_readv(bs, sector_num, qiov, nb_sectors, |
|
cb, opaque); |
|
|
if (ret) { |
if (ret) { |
/* Update stats even though technically transfer has not happened. */ |
/* Update stats even though technically transfer has not happened. */ |
Line 1385 BlockDriverAIOCB *bdrv_aio_read(BlockDri
|
Line 1327 BlockDriverAIOCB *bdrv_aio_read(BlockDri
|
return ret; |
return ret; |
} |
} |
|
|
BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
const uint8_t *buf, int nb_sectors, |
QEMUIOVector *qiov, int nb_sectors, |
BlockDriverCompletionFunc *cb, void *opaque) |
BlockDriverCompletionFunc *cb, void *opaque) |
{ |
{ |
BlockDriver *drv = bs->drv; |
BlockDriver *drv = bs->drv; |
BlockDriverAIOCB *ret; |
BlockDriverAIOCB *ret; |
Line 1399 BlockDriverAIOCB *bdrv_aio_write(BlockDr
|
Line 1341 BlockDriverAIOCB *bdrv_aio_write(BlockDr
|
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
return NULL; |
return NULL; |
|
|
ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors, |
|
cb, opaque); |
|
|
if (ret) { |
if (ret) { |
/* Update stats even though technically transfer has not happened. */ |
/* Update stats even though technically transfer has not happened. */ |
Line 1412 BlockDriverAIOCB *bdrv_aio_write(BlockDr
|
Line 1355 BlockDriverAIOCB *bdrv_aio_write(BlockDr
|
|
|
void bdrv_aio_cancel(BlockDriverAIOCB *acb) |
void bdrv_aio_cancel(BlockDriverAIOCB *acb) |
{ |
{ |
BlockDriver *drv = acb->bs->drv; |
acb->pool->cancel(acb); |
|
|
if (acb->cb == bdrv_aio_rw_vector_cb) { |
|
VectorTranslationState *s = acb->opaque; |
|
acb = s->aiocb; |
|
} |
|
|
|
drv->bdrv_aio_cancel(acb); |
|
} |
} |
|
|
|
|
/**************************************************************/ |
/**************************************************************/ |
/* async block device emulation */ |
/* async block device emulation */ |
|
|
|
typedef struct BlockDriverAIOCBSync { |
|
BlockDriverAIOCB common; |
|
QEMUBH *bh; |
|
int ret; |
|
/* vector translation state */ |
|
QEMUIOVector *qiov; |
|
uint8_t *bounce; |
|
int is_write; |
|
} BlockDriverAIOCBSync; |
|
|
|
static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
|
{ |
|
BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
|
qemu_bh_delete(acb->bh); |
|
acb->bh = NULL; |
|
qemu_aio_release(acb); |
|
} |
|
|
|
static AIOPool bdrv_em_aio_pool = { |
|
.aiocb_size = sizeof(BlockDriverAIOCBSync), |
|
.cancel = bdrv_aio_cancel_em, |
|
}; |
|
|
static void bdrv_aio_bh_cb(void *opaque) |
static void bdrv_aio_bh_cb(void *opaque) |
{ |
{ |
BlockDriverAIOCBSync *acb = opaque; |
BlockDriverAIOCBSync *acb = opaque; |
|
|
|
if (!acb->is_write) |
|
qemu_iovec_from_buffer(acb->qiov, acb->bounce, acb->qiov->size); |
|
qemu_vfree(acb->bounce); |
acb->common.cb(acb->common.opaque, acb->ret); |
acb->common.cb(acb->common.opaque, acb->ret); |
|
qemu_bh_delete(acb->bh); |
|
acb->bh = NULL; |
qemu_aio_release(acb); |
qemu_aio_release(acb); |
} |
} |
|
|
static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, |
int64_t sector_num, uint8_t *buf, int nb_sectors, |
int64_t sector_num, |
BlockDriverCompletionFunc *cb, void *opaque) |
QEMUIOVector *qiov, |
|
int nb_sectors, |
|
BlockDriverCompletionFunc *cb, |
|
void *opaque, |
|
int is_write) |
|
|
{ |
{ |
BlockDriverAIOCBSync *acb; |
BlockDriverAIOCBSync *acb; |
int ret; |
|
|
|
acb = qemu_aio_get(bs, cb, opaque); |
acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
|
acb->is_write = is_write; |
|
acb->qiov = qiov; |
|
acb->bounce = qemu_blockalign(bs, qiov->size); |
|
|
if (!acb->bh) |
if (!acb->bh) |
acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
|
acb->ret = ret; |
if (is_write) { |
|
qemu_iovec_to_buffer(acb->qiov, acb->bounce); |
|
acb->ret = bdrv_write(bs, sector_num, acb->bounce, nb_sectors); |
|
} else { |
|
acb->ret = bdrv_read(bs, sector_num, acb->bounce, nb_sectors); |
|
} |
|
|
qemu_bh_schedule(acb->bh); |
qemu_bh_schedule(acb->bh); |
|
|
return &acb->common; |
return &acb->common; |
} |
} |
|
|
static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, |
int64_t sector_num, const uint8_t *buf, int nb_sectors, |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
BlockDriverCompletionFunc *cb, void *opaque) |
BlockDriverCompletionFunc *cb, void *opaque) |
{ |
{ |
BlockDriverAIOCBSync *acb; |
return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 0); |
int ret; |
|
|
|
acb = qemu_aio_get(bs, cb, opaque); |
|
if (!acb->bh) |
|
acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
|
ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
|
acb->ret = ret; |
|
qemu_bh_schedule(acb->bh); |
|
return &acb->common; |
|
} |
} |
|
|
static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, |
|
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
|
BlockDriverCompletionFunc *cb, void *opaque) |
{ |
{ |
BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1); |
qemu_bh_cancel(acb->bh); |
|
qemu_aio_release(acb); |
|
} |
} |
|
|
/**************************************************************/ |
/**************************************************************/ |
Line 1487 static int bdrv_read_em(BlockDriverState
|
Line 1458 static int bdrv_read_em(BlockDriverState
|
{ |
{ |
int async_ret; |
int async_ret; |
BlockDriverAIOCB *acb; |
BlockDriverAIOCB *acb; |
|
struct iovec iov; |
|
QEMUIOVector qiov; |
|
|
async_ret = NOT_DONE; |
async_ret = NOT_DONE; |
acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
iov.iov_base = (void *)buf; |
bdrv_rw_em_cb, &async_ret); |
iov.iov_len = nb_sectors * 512; |
|
qemu_iovec_init_external(&qiov, &iov, 1); |
|
acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors, |
|
bdrv_rw_em_cb, &async_ret); |
if (acb == NULL) |
if (acb == NULL) |
return -1; |
return -1; |
|
|
Line 1506 static int bdrv_write_em(BlockDriverStat
|
Line 1482 static int bdrv_write_em(BlockDriverStat
|
{ |
{ |
int async_ret; |
int async_ret; |
BlockDriverAIOCB *acb; |
BlockDriverAIOCB *acb; |
|
struct iovec iov; |
|
QEMUIOVector qiov; |
|
|
async_ret = NOT_DONE; |
async_ret = NOT_DONE; |
acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
iov.iov_base = (void *)buf; |
bdrv_rw_em_cb, &async_ret); |
iov.iov_len = nb_sectors * 512; |
|
qemu_iovec_init_external(&qiov, &iov, 1); |
|
acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors, |
|
bdrv_rw_em_cb, &async_ret); |
if (acb == NULL) |
if (acb == NULL) |
return -1; |
return -1; |
while (async_ret == NOT_DONE) { |
while (async_ret == NOT_DONE) { |
Line 1520 static int bdrv_write_em(BlockDriverStat
|
Line 1501 static int bdrv_write_em(BlockDriverStat
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void bdrv_init(void) |
void bdrv_init(void) |
{ |
{ |
bdrv_register(&bdrv_raw); |
module_call_init(MODULE_INIT_BLOCK); |
bdrv_register(&bdrv_host_device); |
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#ifndef _WIN32 |
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bdrv_register(&bdrv_cow); |
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#endif |
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bdrv_register(&bdrv_qcow); |
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bdrv_register(&bdrv_vmdk); |
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bdrv_register(&bdrv_cloop); |
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bdrv_register(&bdrv_dmg); |
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bdrv_register(&bdrv_bochs); |
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bdrv_register(&bdrv_vpc); |
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bdrv_register(&bdrv_vvfat); |
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bdrv_register(&bdrv_qcow2); |
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bdrv_register(&bdrv_parallels); |
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bdrv_register(&bdrv_nbd); |
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} |
} |
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void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, |
void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs, |
void *opaque) |
BlockDriverCompletionFunc *cb, void *opaque) |
{ |
{ |
BlockDriver *drv; |
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BlockDriverAIOCB *acb; |
BlockDriverAIOCB *acb; |
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drv = bs->drv; |
if (pool->free_aiocb) { |
if (drv->free_aiocb) { |
acb = pool->free_aiocb; |
acb = drv->free_aiocb; |
pool->free_aiocb = acb->next; |
drv->free_aiocb = acb->next; |
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} else { |
} else { |
acb = qemu_mallocz(drv->aiocb_size); |
acb = qemu_mallocz(pool->aiocb_size); |
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acb->pool = pool; |
} |
} |
acb->bs = bs; |
acb->bs = bs; |
acb->cb = cb; |
acb->cb = cb; |
Line 1558 void *qemu_aio_get(BlockDriverState *bs,
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Line 1524 void *qemu_aio_get(BlockDriverState *bs,
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void qemu_aio_release(void *p) |
void qemu_aio_release(void *p) |
{ |
{ |
BlockDriverAIOCB *acb = p; |
BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p; |
BlockDriver *drv = acb->bs->drv; |
AIOPool *pool = acb->pool; |
acb->next = drv->free_aiocb; |
acb->next = pool->free_aiocb; |
drv->free_aiocb = acb; |
pool->free_aiocb = acb; |
} |
} |
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/**************************************************************/ |
/**************************************************************/ |
Line 1604 int bdrv_media_changed(BlockDriverState
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Line 1570 int bdrv_media_changed(BlockDriverState
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/** |
/** |
* If eject_flag is TRUE, eject the media. Otherwise, close the tray |
* If eject_flag is TRUE, eject the media. Otherwise, close the tray |
*/ |
*/ |
void bdrv_eject(BlockDriverState *bs, int eject_flag) |
int bdrv_eject(BlockDriverState *bs, int eject_flag) |
{ |
{ |
BlockDriver *drv = bs->drv; |
BlockDriver *drv = bs->drv; |
int ret; |
int ret; |
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if (bs->locked) { |
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return -EBUSY; |
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} |
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if (!drv || !drv->bdrv_eject) { |
if (!drv || !drv->bdrv_eject) { |
ret = -ENOTSUP; |
ret = -ENOTSUP; |
} else { |
} else { |
Line 1617 void bdrv_eject(BlockDriverState *bs, in
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Line 1587 void bdrv_eject(BlockDriverState *bs, in
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if (ret == -ENOTSUP) { |
if (ret == -ENOTSUP) { |
if (eject_flag) |
if (eject_flag) |
bdrv_close(bs); |
bdrv_close(bs); |
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ret = 0; |
} |
} |
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return ret; |
} |
} |
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int bdrv_is_locked(BlockDriverState *bs) |
int bdrv_is_locked(BlockDriverState *bs) |
Line 1649 int bdrv_ioctl(BlockDriverState *bs, uns
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Line 1622 int bdrv_ioctl(BlockDriverState *bs, uns
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return drv->bdrv_ioctl(bs, req, buf); |
return drv->bdrv_ioctl(bs, req, buf); |
return -ENOTSUP; |
return -ENOTSUP; |
} |
} |
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BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
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unsigned long int req, void *buf, |
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BlockDriverCompletionFunc *cb, void *opaque) |
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{ |
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BlockDriver *drv = bs->drv; |
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if (drv && drv->bdrv_aio_ioctl) |
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return drv->bdrv_aio_ioctl(bs, req, buf, cb, opaque); |
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return NULL; |
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} |
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void *qemu_blockalign(BlockDriverState *bs, size_t size) |
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{ |
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return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size); |
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} |