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authorPeter Lieven <pl@kamp.de>2013-10-24 12:06:51 +0200
committerKevin Wolf <kwolf@redhat.com>2013-11-28 10:30:51 +0100
commitaa7bfbfff792538a9eeefe879fc4c629aa0b4203 (patch)
tree76e999bf142961962cbce6bbfa3a3c9888e67ca3 /block.c
parent6faac15fa80c4c1f813d96afc13bceaa3bc5ffe7 (diff)
downloadqemu-arm-aa7bfbfff792538a9eeefe879fc4c629aa0b4203.tar.gz
block: add flags to bdrv_*_write_zeroes
Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block.c')
-rw-r--r--block.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/block.c b/block.c
index 3dc6c12c9d..e14ba48720 100644
--- a/block.c
+++ b/block.c
@@ -79,7 +79,7 @@ static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs,
bool is_write);
static void coroutine_fn bdrv_co_do_rw(void *opaque);
static int coroutine_fn bdrv_co_do_write_zeroes(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors);
+ int64_t sector_num, int nb_sectors, BdrvRequestFlags flags);
static QTAILQ_HEAD(, BlockDriverState) bdrv_states =
QTAILQ_HEAD_INITIALIZER(bdrv_states);
@@ -2392,10 +2392,11 @@ int bdrv_writev(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov)
return bdrv_rwv_co(bs, sector_num, qiov, true, 0);
}
-int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, int nb_sectors)
+int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, BdrvRequestFlags flags)
{
return bdrv_rw_co(bs, sector_num, NULL, nb_sectors, true,
- BDRV_REQ_ZERO_WRITE);
+ BDRV_REQ_ZERO_WRITE | flags);
}
int bdrv_pread(BlockDriverState *bs, int64_t offset,
@@ -2577,7 +2578,7 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BlockDriverState *bs,
if (drv->bdrv_co_write_zeroes &&
buffer_is_zero(bounce_buffer, iov.iov_len)) {
ret = bdrv_co_do_write_zeroes(bs, cluster_sector_num,
- cluster_nb_sectors);
+ cluster_nb_sectors, 0);
} else {
/* This does not change the data on the disk, it is not necessary
* to flush even in cache=writethrough mode.
@@ -2711,7 +2712,7 @@ int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,
}
static int coroutine_fn bdrv_co_do_write_zeroes(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors)
+ int64_t sector_num, int nb_sectors, BdrvRequestFlags flags)
{
BlockDriver *drv = bs->drv;
QEMUIOVector qiov;
@@ -2723,7 +2724,7 @@ static int coroutine_fn bdrv_co_do_write_zeroes(BlockDriverState *bs,
/* First try the efficient write zeroes operation */
if (drv->bdrv_co_write_zeroes) {
- ret = drv->bdrv_co_write_zeroes(bs, sector_num, nb_sectors);
+ ret = drv->bdrv_co_write_zeroes(bs, sector_num, nb_sectors, flags);
if (ret != -ENOTSUP) {
return ret;
}
@@ -2778,7 +2779,7 @@ static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs,
if (ret < 0) {
/* Do nothing, write notifier decided to fail this request */
} else if (flags & BDRV_REQ_ZERO_WRITE) {
- ret = bdrv_co_do_write_zeroes(bs, sector_num, nb_sectors);
+ ret = bdrv_co_do_write_zeroes(bs, sector_num, nb_sectors, flags);
} else {
ret = drv->bdrv_co_writev(bs, sector_num, nb_sectors, qiov);
}
@@ -2812,12 +2813,13 @@ int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
}
int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors)
+ int64_t sector_num, int nb_sectors,
+ BdrvRequestFlags flags)
{
trace_bdrv_co_write_zeroes(bs, sector_num, nb_sectors);
return bdrv_co_do_writev(bs, sector_num, nb_sectors, NULL,
- BDRV_REQ_ZERO_WRITE);
+ BDRV_REQ_ZERO_WRITE | flags);
}
/**