version 1.1.1.13, 2018/04/24 17:20:50
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version 1.1.1.15, 2018/04/24 17:57:40
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Line 22
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* THE SOFTWARE. |
* THE SOFTWARE. |
*/ |
*/ |
#include "config-host.h" |
#include "config-host.h" |
#ifdef HOST_BSD |
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/* include native header before sys-queue.h */ |
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#include <sys/queue.h> |
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#endif |
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#include "qemu-common.h" |
#include "qemu-common.h" |
#include "monitor.h" |
#include "monitor.h" |
#include "block_int.h" |
#include "block_int.h" |
#include "module.h" |
#include "module.h" |
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#include "qemu-objects.h" |
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#ifdef HOST_BSD |
#ifdef CONFIG_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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#include <sys/queue.h> |
#ifndef __DragonFly__ |
#ifndef __DragonFly__ |
#include <sys/disk.h> |
#include <sys/disk.h> |
#endif |
#endif |
Line 45
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Line 42
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#include <windows.h> |
#include <windows.h> |
#endif |
#endif |
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#define SECTOR_BITS 9 |
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#define SECTOR_SIZE (1 << SECTOR_BITS) |
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static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, |
static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
BlockDriverCompletionFunc *cb, void *opaque); |
BlockDriverCompletionFunc *cb, void *opaque); |
static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, |
static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
BlockDriverCompletionFunc *cb, void *opaque); |
BlockDriverCompletionFunc *cb, void *opaque); |
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static BlockDriverAIOCB *bdrv_aio_flush_em(BlockDriverState *bs, |
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BlockDriverCompletionFunc *cb, void *opaque); |
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 63 BlockDriverState *bdrv_first;
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Line 59 BlockDriverState *bdrv_first;
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static BlockDriver *first_drv; |
static BlockDriver *first_drv; |
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/* If non-zero, use only whitelisted block drivers */ |
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static int use_bdrv_whitelist; |
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int path_is_absolute(const char *path) |
int path_is_absolute(const char *path) |
{ |
{ |
const char *p; |
const char *p; |
Line 138 void bdrv_register(BlockDriver *bdrv)
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Line 137 void bdrv_register(BlockDriver *bdrv)
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bdrv->bdrv_read = bdrv_read_em; |
bdrv->bdrv_read = bdrv_read_em; |
bdrv->bdrv_write = bdrv_write_em; |
bdrv->bdrv_write = bdrv_write_em; |
} |
} |
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if (!bdrv->bdrv_aio_flush) |
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bdrv->bdrv_aio_flush = bdrv_aio_flush_em; |
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bdrv->next = first_drv; |
bdrv->next = first_drv; |
first_drv = bdrv; |
first_drv = bdrv; |
} |
} |
Line 169 BlockDriver *bdrv_find_format(const char
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Line 172 BlockDriver *bdrv_find_format(const char
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return NULL; |
return NULL; |
} |
} |
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static int bdrv_is_whitelisted(BlockDriver *drv) |
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{ |
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static const char *whitelist[] = { |
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CONFIG_BDRV_WHITELIST |
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}; |
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const char **p; |
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if (!whitelist[0]) |
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return 1; /* no whitelist, anything goes */ |
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for (p = whitelist; *p; p++) { |
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if (!strcmp(drv->format_name, *p)) { |
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return 1; |
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} |
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} |
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return 0; |
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} |
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BlockDriver *bdrv_find_whitelisted_format(const char *format_name) |
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{ |
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BlockDriver *drv = bdrv_find_format(format_name); |
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return drv && bdrv_is_whitelisted(drv) ? drv : NULL; |
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} |
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int bdrv_create(BlockDriver *drv, const char* filename, |
int bdrv_create(BlockDriver *drv, const char* filename, |
QEMUOptionParameter *options) |
QEMUOptionParameter *options) |
{ |
{ |
Line 329 int bdrv_open(BlockDriverState *bs, cons
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Line 356 int bdrv_open(BlockDriverState *bs, cons
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int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
BlockDriver *drv) |
BlockDriver *drv) |
{ |
{ |
int ret, open_flags; |
int ret, open_flags, try_rw; |
char tmp_filename[PATH_MAX]; |
char tmp_filename[PATH_MAX]; |
char backing_filename[PATH_MAX]; |
char backing_filename[PATH_MAX]; |
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bs->read_only = 0; |
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bs->is_temporary = 0; |
bs->is_temporary = 0; |
bs->encrypted = 0; |
bs->encrypted = 0; |
bs->valid_key = 0; |
bs->valid_key = 0; |
Line 357 int bdrv_open2(BlockDriverState *bs, con
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Line 383 int bdrv_open2(BlockDriverState *bs, con
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bdrv_delete(bs1); |
bdrv_delete(bs1); |
return ret; |
return ret; |
} |
} |
total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
total_size = bdrv_getlength(bs1) >> BDRV_SECTOR_BITS; |
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if (bs1->drv && bs1->drv->protocol_name) |
if (bs1->drv && bs1->drv->protocol_name) |
is_protocol = 1; |
is_protocol = 1; |
Line 408 int bdrv_open2(BlockDriverState *bs, con
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Line 434 int bdrv_open2(BlockDriverState *bs, con
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} |
} |
bs->drv = drv; |
bs->drv = drv; |
bs->opaque = qemu_mallocz(drv->instance_size); |
bs->opaque = qemu_mallocz(drv->instance_size); |
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/* |
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* Yes, BDRV_O_NOCACHE aka O_DIRECT means we have to present a |
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* write cache to the guest. We do need the fdatasync to flush |
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* out transactions for block allocations, and we maybe have a |
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* volatile write cache in our backing device to deal with. |
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*/ |
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if (flags & (BDRV_O_CACHE_WB|BDRV_O_NOCACHE)) |
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bs->enable_write_cache = 1; |
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/* Note: for compatibility, we open disk image files as RDWR, and |
/* Note: for compatibility, we open disk image files as RDWR, and |
RDONLY as fallback */ |
RDONLY as fallback */ |
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try_rw = !bs->read_only || bs->is_temporary; |
if (!(flags & BDRV_O_FILE)) |
if (!(flags & BDRV_O_FILE)) |
open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
open_flags = (try_rw ? BDRV_O_RDWR : 0) | |
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(flags & (BDRV_O_CACHE_MASK|BDRV_O_NATIVE_AIO)); |
else |
else |
open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
ret = drv->bdrv_open(bs, filename, open_flags); |
if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv)) |
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ret = -ENOTSUP; |
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else |
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ret = drv->bdrv_open(bs, filename, open_flags); |
if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
bs->read_only = 1; |
bs->read_only = 1; |
Line 429 int bdrv_open2(BlockDriverState *bs, con
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Line 470 int bdrv_open2(BlockDriverState *bs, con
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return ret; |
return ret; |
} |
} |
if (drv->bdrv_getlength) { |
if (drv->bdrv_getlength) { |
bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
bs->total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
} |
} |
#ifndef _WIN32 |
#ifndef _WIN32 |
if (bs->is_temporary) { |
if (bs->is_temporary) { |
Line 440 int bdrv_open2(BlockDriverState *bs, con
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Line 481 int bdrv_open2(BlockDriverState *bs, con
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/* if there is a backing file, use it */ |
/* if there is a backing file, use it */ |
BlockDriver *back_drv = NULL; |
BlockDriver *back_drv = NULL; |
bs->backing_hd = bdrv_new(""); |
bs->backing_hd = bdrv_new(""); |
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/* pass on read_only property to the backing_hd */ |
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bs->backing_hd->read_only = bs->read_only; |
path_combine(backing_filename, sizeof(backing_filename), |
path_combine(backing_filename, sizeof(backing_filename), |
filename, bs->backing_file); |
filename, bs->backing_file); |
if (bs->backing_format[0] != '\0') |
if (bs->backing_format[0] != '\0') |
Line 530 int bdrv_commit(BlockDriverState *bs)
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Line 573 int bdrv_commit(BlockDriverState *bs)
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return -ENOTSUP; |
return -ENOTSUP; |
} |
} |
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total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
for (i = 0; i < total_sectors;) { |
for (i = 0; i < total_sectors;) { |
if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
for(j = 0; j < n; j++) { |
for(j = 0; j < n; j++) { |
Line 596 int bdrv_read(BlockDriverState *bs, int6
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Line 639 int bdrv_read(BlockDriverState *bs, int6
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return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
} |
} |
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static void set_dirty_bitmap(BlockDriverState *bs, int64_t sector_num, |
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int nb_sectors, int dirty) |
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{ |
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int64_t start, end; |
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unsigned long val, idx, bit; |
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start = sector_num / BDRV_SECTORS_PER_DIRTY_CHUNK; |
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end = (sector_num + nb_sectors - 1) / BDRV_SECTORS_PER_DIRTY_CHUNK; |
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for (; start <= end; start++) { |
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idx = start / (sizeof(unsigned long) * 8); |
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bit = start % (sizeof(unsigned long) * 8); |
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val = bs->dirty_bitmap[idx]; |
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if (dirty) { |
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val |= 1 << bit; |
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} else { |
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val &= ~(1 << bit); |
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} |
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bs->dirty_bitmap[idx] = val; |
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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: |
-EIO generic I/O error (may happen for all errors) |
-EIO generic I/O error (may happen for all errors) |
-ENOMEDIUM No media inserted. |
-ENOMEDIUM No media inserted. |
Line 613 int bdrv_write(BlockDriverState *bs, int
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Line 678 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 (bs->dirty_bitmap) { |
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set_dirty_bitmap(bs, sector_num, nb_sectors, 1); |
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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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int bdrv_pread(BlockDriverState *bs, int64_t offset, |
int bdrv_pread(BlockDriverState *bs, int64_t offset, |
void *buf, int count1) |
void *buf, int count1) |
{ |
{ |
uint8_t tmp_buf[SECTOR_SIZE]; |
uint8_t tmp_buf[BDRV_SECTOR_SIZE]; |
int len, nb_sectors, count; |
int len, nb_sectors, count; |
int64_t sector_num; |
int64_t sector_num; |
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int ret; |
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count = count1; |
count = count1; |
/* first read to align to sector start */ |
/* first read to align to sector start */ |
len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); |
len = (BDRV_SECTOR_SIZE - offset) & (BDRV_SECTOR_SIZE - 1); |
if (len > count) |
if (len > count) |
len = count; |
len = count; |
sector_num = offset >> SECTOR_BITS; |
sector_num = offset >> BDRV_SECTOR_BITS; |
if (len > 0) { |
if (len > 0) { |
if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
return -EIO; |
return ret; |
memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); |
memcpy(buf, tmp_buf + (offset & (BDRV_SECTOR_SIZE - 1)), len); |
count -= len; |
count -= len; |
if (count == 0) |
if (count == 0) |
return count1; |
return count1; |
Line 641 int bdrv_pread(BlockDriverState *bs, int
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Line 711 int bdrv_pread(BlockDriverState *bs, int
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} |
} |
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/* read the sectors "in place" */ |
/* read the sectors "in place" */ |
nb_sectors = count >> SECTOR_BITS; |
nb_sectors = count >> BDRV_SECTOR_BITS; |
if (nb_sectors > 0) { |
if (nb_sectors > 0) { |
if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) |
if ((ret = bdrv_read(bs, sector_num, buf, nb_sectors)) < 0) |
return -EIO; |
return ret; |
sector_num += nb_sectors; |
sector_num += nb_sectors; |
len = nb_sectors << SECTOR_BITS; |
len = nb_sectors << BDRV_SECTOR_BITS; |
buf += len; |
buf += len; |
count -= len; |
count -= len; |
} |
} |
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/* add data from the last sector */ |
/* add data from the last sector */ |
if (count > 0) { |
if (count > 0) { |
if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
return -EIO; |
return ret; |
memcpy(buf, tmp_buf, count); |
memcpy(buf, tmp_buf, count); |
} |
} |
return count1; |
return count1; |
Line 663 int bdrv_pread(BlockDriverState *bs, int
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Line 733 int bdrv_pread(BlockDriverState *bs, int
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int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
const void *buf, int count1) |
const void *buf, int count1) |
{ |
{ |
uint8_t tmp_buf[SECTOR_SIZE]; |
uint8_t tmp_buf[BDRV_SECTOR_SIZE]; |
int len, nb_sectors, count; |
int len, nb_sectors, count; |
int64_t sector_num; |
int64_t sector_num; |
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int ret; |
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count = count1; |
count = count1; |
/* first write to align to sector start */ |
/* first write to align to sector start */ |
len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); |
len = (BDRV_SECTOR_SIZE - offset) & (BDRV_SECTOR_SIZE - 1); |
if (len > count) |
if (len > count) |
len = count; |
len = count; |
sector_num = offset >> SECTOR_BITS; |
sector_num = offset >> BDRV_SECTOR_BITS; |
if (len > 0) { |
if (len > 0) { |
if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
return -EIO; |
return ret; |
memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); |
memcpy(tmp_buf + (offset & (BDRV_SECTOR_SIZE - 1)), buf, len); |
if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
if ((ret = bdrv_write(bs, sector_num, tmp_buf, 1)) < 0) |
return -EIO; |
return ret; |
count -= len; |
count -= len; |
if (count == 0) |
if (count == 0) |
return count1; |
return count1; |
Line 687 int bdrv_pwrite(BlockDriverState *bs, in
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Line 758 int bdrv_pwrite(BlockDriverState *bs, in
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} |
} |
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/* write the sectors "in place" */ |
/* write the sectors "in place" */ |
nb_sectors = count >> SECTOR_BITS; |
nb_sectors = count >> BDRV_SECTOR_BITS; |
if (nb_sectors > 0) { |
if (nb_sectors > 0) { |
if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) |
if ((ret = bdrv_write(bs, sector_num, buf, nb_sectors)) < 0) |
return -EIO; |
return ret; |
sector_num += nb_sectors; |
sector_num += nb_sectors; |
len = nb_sectors << SECTOR_BITS; |
len = nb_sectors << BDRV_SECTOR_BITS; |
buf += len; |
buf += len; |
count -= len; |
count -= len; |
} |
} |
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/* add data from the last sector */ |
/* add data from the last sector */ |
if (count > 0) { |
if (count > 0) { |
if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
return -EIO; |
return ret; |
memcpy(tmp_buf, buf, count); |
memcpy(tmp_buf, buf, count); |
if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
if ((ret = bdrv_write(bs, sector_num, tmp_buf, 1)) < 0) |
return -EIO; |
return ret; |
} |
} |
return count1; |
return count1; |
} |
} |
Line 718 int bdrv_truncate(BlockDriverState *bs,
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Line 789 int bdrv_truncate(BlockDriverState *bs,
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return -ENOMEDIUM; |
return -ENOMEDIUM; |
if (!drv->bdrv_truncate) |
if (!drv->bdrv_truncate) |
return -ENOTSUP; |
return -ENOTSUP; |
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if (bs->read_only) |
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return -EACCES; |
return drv->bdrv_truncate(bs, offset); |
return drv->bdrv_truncate(bs, offset); |
} |
} |
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Line 731 int64_t bdrv_getlength(BlockDriverState
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Line 804 int64_t bdrv_getlength(BlockDriverState
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return -ENOMEDIUM; |
return -ENOMEDIUM; |
if (!drv->bdrv_getlength) { |
if (!drv->bdrv_getlength) { |
/* legacy mode */ |
/* legacy mode */ |
return bs->total_sectors * SECTOR_SIZE; |
return bs->total_sectors * BDRV_SECTOR_SIZE; |
} |
} |
return drv->bdrv_getlength(bs); |
return drv->bdrv_getlength(bs); |
} |
} |
Line 744 void bdrv_get_geometry(BlockDriverState
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Line 817 void bdrv_get_geometry(BlockDriverState
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if (length < 0) |
if (length < 0) |
length = 0; |
length = 0; |
else |
else |
length = length >> SECTOR_BITS; |
length = length >> BDRV_SECTOR_BITS; |
*nb_sectors_ptr = length; |
*nb_sectors_ptr = length; |
} |
} |
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Line 912 int bdrv_is_read_only(BlockDriverState *
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Line 985 int bdrv_is_read_only(BlockDriverState *
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return bs->read_only; |
return bs->read_only; |
} |
} |
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int bdrv_set_read_only(BlockDriverState *bs, int read_only) |
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{ |
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int ret = bs->read_only; |
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bs->read_only = read_only; |
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return ret; |
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} |
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int bdrv_is_sg(BlockDriverState *bs) |
int bdrv_is_sg(BlockDriverState *bs) |
{ |
{ |
return bs->sg; |
return bs->sg; |
} |
} |
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int bdrv_enable_write_cache(BlockDriverState *bs) |
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{ |
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return bs->enable_write_cache; |
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} |
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/* XXX: no longer used */ |
/* XXX: no longer used */ |
void bdrv_set_change_cb(BlockDriverState *bs, |
void bdrv_set_change_cb(BlockDriverState *bs, |
void (*change_cb)(void *opaque), void *opaque) |
void (*change_cb)(void *opaque), void *opaque) |
Line 1057 int bdrv_is_allocated(BlockDriverState *
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Line 1142 int bdrv_is_allocated(BlockDriverState *
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return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); |
return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); |
} |
} |
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void bdrv_info(Monitor *mon) |
static void bdrv_print_dict(QObject *obj, void *opaque) |
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{ |
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QDict *bs_dict; |
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Monitor *mon = opaque; |
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bs_dict = qobject_to_qdict(obj); |
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monitor_printf(mon, "%s: type=%s removable=%d", |
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qdict_get_str(bs_dict, "device"), |
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qdict_get_str(bs_dict, "type"), |
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qdict_get_bool(bs_dict, "removable")); |
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if (qdict_get_bool(bs_dict, "removable")) { |
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monitor_printf(mon, " locked=%d", qdict_get_bool(bs_dict, "locked")); |
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} |
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if (qdict_haskey(bs_dict, "inserted")) { |
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QDict *qdict = qobject_to_qdict(qdict_get(bs_dict, "inserted")); |
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monitor_printf(mon, " file="); |
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monitor_print_filename(mon, qdict_get_str(qdict, "file")); |
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if (qdict_haskey(qdict, "backing_file")) { |
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monitor_printf(mon, " backing_file="); |
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monitor_print_filename(mon, qdict_get_str(qdict, "backing_file")); |
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} |
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monitor_printf(mon, " ro=%d drv=%s encrypted=%d", |
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qdict_get_bool(qdict, "ro"), |
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qdict_get_str(qdict, "drv"), |
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qdict_get_bool(qdict, "encrypted")); |
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} else { |
|
monitor_printf(mon, " [not inserted]"); |
|
} |
|
|
|
monitor_printf(mon, "\n"); |
|
} |
|
|
|
void bdrv_info_print(Monitor *mon, const QObject *data) |
|
{ |
|
qlist_iter(qobject_to_qlist(data), bdrv_print_dict, mon); |
|
} |
|
|
|
/** |
|
* bdrv_info(): Block devices information |
|
* |
|
* Each block device information is stored in a QDict and the |
|
* returned QObject is a QList of all devices. |
|
* |
|
* The QDict contains the following: |
|
* |
|
* - "device": device name |
|
* - "type": device type |
|
* - "removable": true if the device is removable, false otherwise |
|
* - "locked": true if the device is locked, false otherwise |
|
* - "inserted": only present if the device is inserted, it is a QDict |
|
* containing the following: |
|
* - "file": device file name |
|
* - "ro": true if read-only, false otherwise |
|
* - "drv": driver format name |
|
* - "backing_file": backing file name if one is used |
|
* - "encrypted": true if encrypted, false otherwise |
|
* |
|
* Example: |
|
* |
|
* [ { "device": "ide0-hd0", "type": "hd", "removable": false, "locked": false, |
|
* "inserted": { "file": "/tmp/foobar", "ro": false, "drv": "qcow2" } }, |
|
* { "device": "floppy0", "type": "floppy", "removable": true, |
|
* "locked": false } ] |
|
*/ |
|
void bdrv_info(Monitor *mon, QObject **ret_data) |
{ |
{ |
|
QList *bs_list; |
BlockDriverState *bs; |
BlockDriverState *bs; |
|
|
|
bs_list = qlist_new(); |
|
|
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
monitor_printf(mon, "%s:", bs->device_name); |
QObject *bs_obj; |
monitor_printf(mon, " type="); |
const char *type = "unknown"; |
|
|
switch(bs->type) { |
switch(bs->type) { |
case BDRV_TYPE_HD: |
case BDRV_TYPE_HD: |
monitor_printf(mon, "hd"); |
type = "hd"; |
break; |
break; |
case BDRV_TYPE_CDROM: |
case BDRV_TYPE_CDROM: |
monitor_printf(mon, "cdrom"); |
type = "cdrom"; |
break; |
break; |
case BDRV_TYPE_FLOPPY: |
case BDRV_TYPE_FLOPPY: |
monitor_printf(mon, "floppy"); |
type = "floppy"; |
break; |
break; |
} |
} |
monitor_printf(mon, " removable=%d", bs->removable); |
|
if (bs->removable) { |
bs_obj = qobject_from_jsonf("{ 'device': %s, 'type': %s, " |
monitor_printf(mon, " locked=%d", bs->locked); |
"'removable': %i, 'locked': %i }", |
} |
bs->device_name, type, bs->removable, |
|
bs->locked); |
|
assert(bs_obj != NULL); |
|
|
if (bs->drv) { |
if (bs->drv) { |
monitor_printf(mon, " file="); |
QObject *obj; |
monitor_print_filename(mon, bs->filename); |
QDict *bs_dict = qobject_to_qdict(bs_obj); |
|
|
|
obj = qobject_from_jsonf("{ 'file': %s, 'ro': %i, 'drv': %s, " |
|
"'encrypted': %i }", |
|
bs->filename, bs->read_only, |
|
bs->drv->format_name, |
|
bdrv_is_encrypted(bs)); |
|
assert(obj != NULL); |
if (bs->backing_file[0] != '\0') { |
if (bs->backing_file[0] != '\0') { |
monitor_printf(mon, " backing_file="); |
QDict *qdict = qobject_to_qdict(obj); |
monitor_print_filename(mon, bs->backing_file); |
qdict_put(qdict, "backing_file", |
|
qstring_from_str(bs->backing_file)); |
} |
} |
monitor_printf(mon, " ro=%d", bs->read_only); |
|
monitor_printf(mon, " drv=%s", bs->drv->format_name); |
qdict_put_obj(bs_dict, "inserted", obj); |
monitor_printf(mon, " encrypted=%d", bdrv_is_encrypted(bs)); |
|
} else { |
|
monitor_printf(mon, " [not inserted]"); |
|
} |
} |
monitor_printf(mon, "\n"); |
qlist_append_obj(bs_list, bs_obj); |
} |
} |
|
|
|
*ret_data = QOBJECT(bs_list); |
} |
} |
|
|
/* The "info blockstats" command. */ |
static void bdrv_stats_iter(QObject *data, void *opaque) |
void bdrv_info_stats(Monitor *mon) |
|
{ |
{ |
|
QDict *qdict; |
|
Monitor *mon = opaque; |
|
|
|
qdict = qobject_to_qdict(data); |
|
monitor_printf(mon, "%s:", qdict_get_str(qdict, "device")); |
|
|
|
qdict = qobject_to_qdict(qdict_get(qdict, "stats")); |
|
monitor_printf(mon, " rd_bytes=%" PRId64 |
|
" wr_bytes=%" PRId64 |
|
" rd_operations=%" PRId64 |
|
" wr_operations=%" PRId64 |
|
"\n", |
|
qdict_get_int(qdict, "rd_bytes"), |
|
qdict_get_int(qdict, "wr_bytes"), |
|
qdict_get_int(qdict, "rd_operations"), |
|
qdict_get_int(qdict, "wr_operations")); |
|
} |
|
|
|
void bdrv_stats_print(Monitor *mon, const QObject *data) |
|
{ |
|
qlist_iter(qobject_to_qlist(data), bdrv_stats_iter, mon); |
|
} |
|
|
|
/** |
|
* bdrv_info_stats(): show block device statistics |
|
* |
|
* Each device statistic information is stored in a QDict and |
|
* the returned QObject is a QList of all devices. |
|
* |
|
* The QDict contains the following: |
|
* |
|
* - "device": device name |
|
* - "stats": A QDict with the statistics information, it contains: |
|
* - "rd_bytes": bytes read |
|
* - "wr_bytes": bytes written |
|
* - "rd_operations": read operations |
|
* - "wr_operations": write operations |
|
* |
|
* Example: |
|
* |
|
* [ { "device": "ide0-hd0", |
|
* "stats": { "rd_bytes": 512, |
|
* "wr_bytes": 0, |
|
* "rd_operations": 1, |
|
* "wr_operations": 0 } }, |
|
* { "device": "ide1-cd0", |
|
* "stats": { "rd_bytes": 0, |
|
* "wr_bytes": 0, |
|
* "rd_operations": 0, |
|
* "wr_operations": 0 } } ] |
|
*/ |
|
void bdrv_info_stats(Monitor *mon, QObject **ret_data) |
|
{ |
|
QObject *obj; |
|
QList *devices; |
BlockDriverState *bs; |
BlockDriverState *bs; |
|
|
|
devices = qlist_new(); |
|
|
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
monitor_printf(mon, "%s:" |
obj = qobject_from_jsonf("{ 'device': %s, 'stats': {" |
" rd_bytes=%" PRIu64 |
"'rd_bytes': %" PRId64 "," |
" wr_bytes=%" PRIu64 |
"'wr_bytes': %" PRId64 "," |
" rd_operations=%" PRIu64 |
"'rd_operations': %" PRId64 "," |
" wr_operations=%" PRIu64 |
"'wr_operations': %" PRId64 |
"\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); |
|
assert(obj != NULL); |
|
qlist_append_obj(devices, obj); |
} |
} |
|
|
|
*ret_data = QOBJECT(devices); |
} |
} |
|
|
const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
Line 1144 int bdrv_write_compressed(BlockDriverSta
|
Line 1371 int bdrv_write_compressed(BlockDriverSta
|
return -ENOTSUP; |
return -ENOTSUP; |
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
return -EIO; |
return -EIO; |
|
|
|
if (bs->dirty_bitmap) { |
|
set_dirty_bitmap(bs, sector_num, nb_sectors, 1); |
|
} |
|
|
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
} |
} |
|
|
Line 1320 BlockDriverAIOCB *bdrv_aio_readv(BlockDr
|
Line 1552 BlockDriverAIOCB *bdrv_aio_readv(BlockDr
|
|
|
if (ret) { |
if (ret) { |
/* Update stats even though technically transfer has not happened. */ |
/* Update stats even though technically transfer has not happened. */ |
bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; |
bs->rd_bytes += (unsigned) nb_sectors * BDRV_SECTOR_SIZE; |
bs->rd_ops ++; |
bs->rd_ops ++; |
} |
} |
|
|
Line 1341 BlockDriverAIOCB *bdrv_aio_writev(BlockD
|
Line 1573 BlockDriverAIOCB *bdrv_aio_writev(BlockD
|
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
if (bdrv_check_request(bs, sector_num, nb_sectors)) |
return NULL; |
return NULL; |
|
|
|
if (bs->dirty_bitmap) { |
|
set_dirty_bitmap(bs, sector_num, nb_sectors, 1); |
|
} |
|
|
ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors, |
ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors, |
cb, opaque); |
cb, opaque); |
|
|
if (ret) { |
if (ret) { |
/* Update stats even though technically transfer has not happened. */ |
/* Update stats even though technically transfer has not happened. */ |
bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; |
bs->wr_bytes += (unsigned) nb_sectors * BDRV_SECTOR_SIZE; |
bs->wr_ops ++; |
bs->wr_ops ++; |
} |
} |
|
|
return ret; |
return ret; |
} |
} |
|
|
|
|
|
typedef struct MultiwriteCB { |
|
int error; |
|
int num_requests; |
|
int num_callbacks; |
|
struct { |
|
BlockDriverCompletionFunc *cb; |
|
void *opaque; |
|
QEMUIOVector *free_qiov; |
|
void *free_buf; |
|
} callbacks[]; |
|
} MultiwriteCB; |
|
|
|
static void multiwrite_user_cb(MultiwriteCB *mcb) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < mcb->num_callbacks; i++) { |
|
mcb->callbacks[i].cb(mcb->callbacks[i].opaque, mcb->error); |
|
qemu_free(mcb->callbacks[i].free_qiov); |
|
qemu_vfree(mcb->callbacks[i].free_buf); |
|
} |
|
} |
|
|
|
static void multiwrite_cb(void *opaque, int ret) |
|
{ |
|
MultiwriteCB *mcb = opaque; |
|
|
|
if (ret < 0) { |
|
mcb->error = ret; |
|
multiwrite_user_cb(mcb); |
|
} |
|
|
|
mcb->num_requests--; |
|
if (mcb->num_requests == 0) { |
|
if (mcb->error == 0) { |
|
multiwrite_user_cb(mcb); |
|
} |
|
qemu_free(mcb); |
|
} |
|
} |
|
|
|
static int multiwrite_req_compare(const void *a, const void *b) |
|
{ |
|
return (((BlockRequest*) a)->sector - ((BlockRequest*) b)->sector); |
|
} |
|
|
|
/* |
|
* Takes a bunch of requests and tries to merge them. Returns the number of |
|
* requests that remain after merging. |
|
*/ |
|
static int multiwrite_merge(BlockDriverState *bs, BlockRequest *reqs, |
|
int num_reqs, MultiwriteCB *mcb) |
|
{ |
|
int i, outidx; |
|
|
|
// Sort requests by start sector |
|
qsort(reqs, num_reqs, sizeof(*reqs), &multiwrite_req_compare); |
|
|
|
// Check if adjacent requests touch the same clusters. If so, combine them, |
|
// filling up gaps with zero sectors. |
|
outidx = 0; |
|
for (i = 1; i < num_reqs; i++) { |
|
int merge = 0; |
|
int64_t oldreq_last = reqs[outidx].sector + reqs[outidx].nb_sectors; |
|
|
|
// This handles the cases that are valid for all block drivers, namely |
|
// exactly sequential writes and overlapping writes. |
|
if (reqs[i].sector <= oldreq_last) { |
|
merge = 1; |
|
} |
|
|
|
// The block driver may decide that it makes sense to combine requests |
|
// even if there is a gap of some sectors between them. In this case, |
|
// the gap is filled with zeros (therefore only applicable for yet |
|
// unused space in format like qcow2). |
|
if (!merge && bs->drv->bdrv_merge_requests) { |
|
merge = bs->drv->bdrv_merge_requests(bs, &reqs[outidx], &reqs[i]); |
|
} |
|
|
|
if (merge) { |
|
size_t size; |
|
QEMUIOVector *qiov = qemu_mallocz(sizeof(*qiov)); |
|
qemu_iovec_init(qiov, |
|
reqs[outidx].qiov->niov + reqs[i].qiov->niov + 1); |
|
|
|
// Add the first request to the merged one. If the requests are |
|
// overlapping, drop the last sectors of the first request. |
|
size = (reqs[i].sector - reqs[outidx].sector) << 9; |
|
qemu_iovec_concat(qiov, reqs[outidx].qiov, size); |
|
|
|
// We might need to add some zeros between the two requests |
|
if (reqs[i].sector > oldreq_last) { |
|
size_t zero_bytes = (reqs[i].sector - oldreq_last) << 9; |
|
uint8_t *buf = qemu_blockalign(bs, zero_bytes); |
|
memset(buf, 0, zero_bytes); |
|
qemu_iovec_add(qiov, buf, zero_bytes); |
|
mcb->callbacks[i].free_buf = buf; |
|
} |
|
|
|
// Add the second request |
|
qemu_iovec_concat(qiov, reqs[i].qiov, reqs[i].qiov->size); |
|
|
|
reqs[outidx].nb_sectors += reqs[i].nb_sectors; |
|
reqs[outidx].qiov = qiov; |
|
|
|
mcb->callbacks[i].free_qiov = reqs[outidx].qiov; |
|
} else { |
|
outidx++; |
|
reqs[outidx].sector = reqs[i].sector; |
|
reqs[outidx].nb_sectors = reqs[i].nb_sectors; |
|
reqs[outidx].qiov = reqs[i].qiov; |
|
} |
|
} |
|
|
|
return outidx + 1; |
|
} |
|
|
|
/* |
|
* Submit multiple AIO write requests at once. |
|
* |
|
* On success, the function returns 0 and all requests in the reqs array have |
|
* been submitted. In error case this function returns -1, and any of the |
|
* requests may or may not be submitted yet. In particular, this means that the |
|
* callback will be called for some of the requests, for others it won't. The |
|
* caller must check the error field of the BlockRequest to wait for the right |
|
* callbacks (if error != 0, no callback will be called). |
|
* |
|
* The implementation may modify the contents of the reqs array, e.g. to merge |
|
* requests. However, the fields opaque and error are left unmodified as they |
|
* are used to signal failure for a single request to the caller. |
|
*/ |
|
int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, int num_reqs) |
|
{ |
|
BlockDriverAIOCB *acb; |
|
MultiwriteCB *mcb; |
|
int i; |
|
|
|
if (num_reqs == 0) { |
|
return 0; |
|
} |
|
|
|
// Create MultiwriteCB structure |
|
mcb = qemu_mallocz(sizeof(*mcb) + num_reqs * sizeof(*mcb->callbacks)); |
|
mcb->num_requests = 0; |
|
mcb->num_callbacks = num_reqs; |
|
|
|
for (i = 0; i < num_reqs; i++) { |
|
mcb->callbacks[i].cb = reqs[i].cb; |
|
mcb->callbacks[i].opaque = reqs[i].opaque; |
|
} |
|
|
|
// Check for mergable requests |
|
num_reqs = multiwrite_merge(bs, reqs, num_reqs, mcb); |
|
|
|
// Run the aio requests |
|
for (i = 0; i < num_reqs; i++) { |
|
acb = bdrv_aio_writev(bs, reqs[i].sector, reqs[i].qiov, |
|
reqs[i].nb_sectors, multiwrite_cb, mcb); |
|
|
|
if (acb == NULL) { |
|
// We can only fail the whole thing if no request has been |
|
// submitted yet. Otherwise we'll wait for the submitted AIOs to |
|
// complete and report the error in the callback. |
|
if (mcb->num_requests == 0) { |
|
reqs[i].error = EIO; |
|
goto fail; |
|
} else { |
|
mcb->error = EIO; |
|
break; |
|
} |
|
} else { |
|
mcb->num_requests++; |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
fail: |
|
free(mcb); |
|
return -1; |
|
} |
|
|
|
BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, |
|
BlockDriverCompletionFunc *cb, void *opaque) |
|
{ |
|
BlockDriver *drv = bs->drv; |
|
|
|
if (!drv) |
|
return NULL; |
|
|
|
/* |
|
* Note that unlike bdrv_flush the driver is reponsible for flushing a |
|
* backing image if it exists. |
|
*/ |
|
return drv->bdrv_aio_flush(bs, cb, opaque); |
|
} |
|
|
void bdrv_aio_cancel(BlockDriverAIOCB *acb) |
void bdrv_aio_cancel(BlockDriverAIOCB *acb) |
{ |
{ |
acb->pool->cancel(acb); |
acb->pool->cancel(acb); |
Line 1443 static BlockDriverAIOCB *bdrv_aio_writev
|
Line 1877 static BlockDriverAIOCB *bdrv_aio_writev
|
return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1); |
return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1); |
} |
} |
|
|
|
static BlockDriverAIOCB *bdrv_aio_flush_em(BlockDriverState *bs, |
|
BlockDriverCompletionFunc *cb, void *opaque) |
|
{ |
|
BlockDriverAIOCBSync *acb; |
|
|
|
acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
|
acb->is_write = 1; /* don't bounce in the completion hadler */ |
|
acb->qiov = NULL; |
|
acb->bounce = NULL; |
|
acb->ret = 0; |
|
|
|
if (!acb->bh) |
|
acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
|
|
|
bdrv_flush(bs); |
|
qemu_bh_schedule(acb->bh); |
|
return &acb->common; |
|
} |
|
|
/**************************************************************/ |
/**************************************************************/ |
/* sync block device emulation */ |
/* sync block device emulation */ |
|
|
Line 1461 static int bdrv_read_em(BlockDriverState
|
Line 1914 static int bdrv_read_em(BlockDriverState
|
struct iovec iov; |
struct iovec iov; |
QEMUIOVector qiov; |
QEMUIOVector qiov; |
|
|
|
async_context_push(); |
|
|
async_ret = NOT_DONE; |
async_ret = NOT_DONE; |
iov.iov_base = (void *)buf; |
iov.iov_base = (void *)buf; |
iov.iov_len = nb_sectors * 512; |
iov.iov_len = nb_sectors * 512; |
qemu_iovec_init_external(&qiov, &iov, 1); |
qemu_iovec_init_external(&qiov, &iov, 1); |
acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors, |
acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors, |
bdrv_rw_em_cb, &async_ret); |
bdrv_rw_em_cb, &async_ret); |
if (acb == NULL) |
if (acb == NULL) { |
return -1; |
async_ret = -1; |
|
goto fail; |
|
} |
|
|
while (async_ret == NOT_DONE) { |
while (async_ret == NOT_DONE) { |
qemu_aio_wait(); |
qemu_aio_wait(); |
} |
} |
|
|
|
|
|
fail: |
|
async_context_pop(); |
return async_ret; |
return async_ret; |
} |
} |
|
|
Line 1485 static int bdrv_write_em(BlockDriverStat
|
Line 1945 static int bdrv_write_em(BlockDriverStat
|
struct iovec iov; |
struct iovec iov; |
QEMUIOVector qiov; |
QEMUIOVector qiov; |
|
|
|
async_context_push(); |
|
|
async_ret = NOT_DONE; |
async_ret = NOT_DONE; |
iov.iov_base = (void *)buf; |
iov.iov_base = (void *)buf; |
iov.iov_len = nb_sectors * 512; |
iov.iov_len = nb_sectors * 512; |
qemu_iovec_init_external(&qiov, &iov, 1); |
qemu_iovec_init_external(&qiov, &iov, 1); |
acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors, |
acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors, |
bdrv_rw_em_cb, &async_ret); |
bdrv_rw_em_cb, &async_ret); |
if (acb == NULL) |
if (acb == NULL) { |
return -1; |
async_ret = -1; |
|
goto fail; |
|
} |
while (async_ret == NOT_DONE) { |
while (async_ret == NOT_DONE) { |
qemu_aio_wait(); |
qemu_aio_wait(); |
} |
} |
|
|
|
fail: |
|
async_context_pop(); |
return async_ret; |
return async_ret; |
} |
} |
|
|
Line 1504 void bdrv_init(void)
|
Line 1971 void bdrv_init(void)
|
module_call_init(MODULE_INIT_BLOCK); |
module_call_init(MODULE_INIT_BLOCK); |
} |
} |
|
|
|
void bdrv_init_with_whitelist(void) |
|
{ |
|
use_bdrv_whitelist = 1; |
|
bdrv_init(); |
|
} |
|
|
void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs, |
void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs, |
BlockDriverCompletionFunc *cb, void *opaque) |
BlockDriverCompletionFunc *cb, void *opaque) |
{ |
{ |
Line 1634 BlockDriverAIOCB *bdrv_aio_ioctl(BlockDr
|
Line 2107 BlockDriverAIOCB *bdrv_aio_ioctl(BlockDr
|
return NULL; |
return NULL; |
} |
} |
|
|
|
|
|
|
void *qemu_blockalign(BlockDriverState *bs, size_t size) |
void *qemu_blockalign(BlockDriverState *bs, size_t size) |
{ |
{ |
return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size); |
return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size); |
} |
} |
|
|
|
void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable) |
|
{ |
|
int64_t bitmap_size; |
|
|
|
if (enable) { |
|
if (!bs->dirty_bitmap) { |
|
bitmap_size = (bdrv_getlength(bs) >> BDRV_SECTOR_BITS) + |
|
BDRV_SECTORS_PER_DIRTY_CHUNK * 8 - 1; |
|
bitmap_size /= BDRV_SECTORS_PER_DIRTY_CHUNK * 8; |
|
|
|
bs->dirty_bitmap = qemu_mallocz(bitmap_size); |
|
} |
|
} else { |
|
if (bs->dirty_bitmap) { |
|
qemu_free(bs->dirty_bitmap); |
|
bs->dirty_bitmap = NULL; |
|
} |
|
} |
|
} |
|
|
|
int bdrv_get_dirty(BlockDriverState *bs, int64_t sector) |
|
{ |
|
int64_t chunk = sector / (int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK; |
|
|
|
if (bs->dirty_bitmap && |
|
(sector << BDRV_SECTOR_BITS) < bdrv_getlength(bs)) { |
|
return bs->dirty_bitmap[chunk / (sizeof(unsigned long) * 8)] & |
|
(1 << (chunk % (sizeof(unsigned long) * 8))); |
|
} else { |
|
return 0; |
|
} |
|
} |
|
|
|
void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, |
|
int nr_sectors) |
|
{ |
|
set_dirty_bitmap(bs, cur_sector, nr_sectors, 0); |
|
} |