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block: Implement blk_pwrite_zeroes() using generated_co_wrapper 

Signed-off-by: Alberto Faria <afaria@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220705161527.1054072-13-afaria@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
This commit is contained in:
Alberto Faria 2022-07-05 17:15:20 +01:00 committed by Hanna Reitz
parent 2c9715fa28
commit 1c95dc914a
3 changed files with 20 additions and 10 deletions
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8
block/block-backend.c
View File

@ -1411,14 +1411,6 @@ typedef struct BlkRwCo {
BdrvRequestFlags flags;
} BlkRwCo;
int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int64_t bytes, BdrvRequestFlags flags)
{
IO_OR_GS_CODE();
return blk_pwritev_part(blk, offset, bytes, NULL, 0,
flags | BDRV_REQ_ZERO_WRITE);
}
int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags)
{
GLOBAL_STATE_CODE();

5
include/sysemu/block-backend-io.h
View File

@ -173,8 +173,9 @@ int generated_co_wrapper blk_pwrite_compressed(BlockBackend *blk,
int coroutine_fn blk_co_pwrite_compressed(BlockBackend *blk, int64_t offset,
int64_t bytes, const void *buf);
int blk_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes);
int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int64_t bytes, BdrvRequestFlags flags);
int generated_co_wrapper blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int64_t bytes,
BdrvRequestFlags flags);
int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int64_t bytes, BdrvRequestFlags flags);
int blk_truncate(BlockBackend *blk, int64_t offset, bool exact,

17
tests/unit/test-block-iothread.c
View File

@ -212,6 +212,19 @@ static void test_sync_op_blk_pwrite_compressed(BlockBackend *blk)
g_assert_cmpint(ret, ==, -EIO);
}
static void test_sync_op_blk_pwrite_zeroes(BlockBackend *blk)
{
int ret;
/* Success */
ret = blk_pwrite_zeroes(blk, 0, 512, 0);
g_assert_cmpint(ret, ==, 0);
/* Early error: Negative offset */
ret = blk_pwrite_zeroes(blk, -2, 512, 0);
g_assert_cmpint(ret, ==, -EIO);
}
static void test_sync_op_load_vmstate(BdrvChild *c)
{
uint8_t buf[512];
@ -395,6 +408,10 @@ const SyncOpTest sync_op_tests[] = {
.name = "/sync-op/pwrite_compressed",
.fn = NULL,
.blkfn = test_sync_op_blk_pwrite_compressed,
}, {
.name = "/sync-op/pwrite_zeroes",
.fn = NULL,
.blkfn = test_sync_op_blk_pwrite_zeroes,
}, {
.name = "/sync-op/load_vmstate",
.fn = test_sync_op_load_vmstate,