openkylin
/
qemu
mirror of https://gitee.com/openkylin/qemu.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

block: make qiov_is_aligned() public 

The qiov_is_aligned() function checks whether a QEMUIOVector meets a
BlockDriverState's alignment requirements.  This is needed by
virtio-blk-data-plane so:

1. Move the function from block/raw-posix.c to block/block.c.
2. Make it public in block/block.h.
3. Rename to bdrv_qiov_is_aligned().
4. Change return type from int to bool.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2013-01-11 16:41:27 +01:00 committed by Kevin Wolf
parent b608c8dc02
commit c53b1c5114
3 changed files with 18 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
block.c
View File

@ -4313,6 +4313,22 @@ void *qemu_blockalign(BlockDriverState *bs, size_t size)
return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size);
}
/*
* Check if all memory in this vector is sector aligned.
*/
bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
{
int i;
for (i = 0; i < qiov->niov; i++) {
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
return false;
}
}
return true;
}
void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable)
{
int64_t bitmap_size;

18
block/raw-posix.c
View File

@ -430,22 +430,6 @@ static void raw_reopen_abort(BDRVReopenState *state)
#endif
*/
/*
* Check if all memory in this vector is sector aligned.
*/
static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
{
int i;
for (i = 0; i < qiov->niov; i++) {
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
return 0;
}
}
return 1;
}
static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb)
{
int ret;
@ -714,7 +698,7 @@ static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
* driver that it needs to copy the buffer.
*/
if ((bs->open_flags & BDRV_O_NOCACHE)) {
if (!qiov_is_aligned(bs, qiov)) {
if (!bdrv_qiov_is_aligned(bs, qiov)) {
type |= QEMU_AIO_MISALIGNED;
#ifdef CONFIG_LINUX_AIO
} else if (s->use_aio) {

1
include/block/block.h
View File

@ -349,6 +349,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
void bdrv_set_buffer_alignment(BlockDriverState *bs, int align);
void *qemu_blockalign(BlockDriverState *bs, size_t size);
bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov);
#define BDRV_SECTORS_PER_DIRTY_CHUNK 2048