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block: use int64_t as bytes type in tracked requests

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We are generally moving to int64_t for both offset and bytes parameters
on all io paths.

Main motivation is realization of 64-bit write_zeroes operation for
fast zeroing large disk chunks, up to the whole disk.

We chose signed type, to be consistent with off_t (which is signed) and
with possibility for signed return type (where negative value means
error).

All requests in block/io must not overflow BDRV_MAX_LENGTH, all
external users of BdrvTrackedRequest already have corresponding
assertions, so we are safe. Add some assertions still.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20201211183934.169161-9-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake 2021-02-03 08:14:15 -06:00
parent 63f4ad1186
commit 8024726459
2 changed files with 11 additions and 7 deletions
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4
include/block/block_int.h
View file

@ -79,12 +79,12 @@ enum BdrvTrackedRequestType {
typedef struct BdrvTrackedRequest {
BlockDriverState *bs;
int64_t offset;
uint64_t bytes;
int64_t bytes;
enum BdrvTrackedRequestType type;
bool serialising;
int64_t overlap_offset;
uint64_t overlap_bytes;
int64_t overlap_bytes;
QLIST_ENTRY(BdrvTrackedRequest) list;
Coroutine *co; /* owner, used for deadlock detection */