As we change bdrv_is_allocated to gather more information from bs and
bs->file, it will become a bit slower. It is still appropriate for online
jobs, but not for reads/writes. Call the internal function instead.
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
block/cow.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/block/cow.c b/block/cow.c
index 133e596..9d26592 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -46,6 +46,9 @@ typedef struct BDRVCowState {
int64_t cow_sectors_offset;
} BDRVCowState;
+static int coroutine_fn cow_co_is_allocated(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, int *num_same);
+
static int cow_probe(const uint8_t *buf, int buf_size, const char *filename)
{
const struct cow_header_v2 *cow_header = (const void *)buf;
@@ -212,7 +215,7 @@ static int coroutine_fn cow_read(BlockDriverState *bs,
int64_t sector_num,
int ret, n;
while (nb_sectors > 0) {
- if (bdrv_co_is_allocated(bs, sector_num, nb_sectors, &n)) {
+ if (cow_co_is_allocated(bs, sector_num, nb_sectors, &n)) {
ret = bdrv_pread(bs->file,
s->cow_sectors_offset + sector_num * 512,
buf, n * 512);
--
1.8.2.1
