From 8024726459f37ffcceebfc9e50ff8e5cc362f274 Mon Sep 17 00:00:00 2001 From: Eric Blake Date: Wed, 3 Feb 2021 08:14:15 -0600 Subject: block: use int64_t as bytes type in tracked requests 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 Message-Id: <20201211183934.169161-9-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake Signed-off-by: Eric Blake --- block/io.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) (limited to 'block/io.c') diff --git a/block/io.c b/block/io.c index b56db91..1c23587 100644 --- a/block/io.c +++ b/block/io.c @@ -717,10 +717,10 @@ static void tracked_request_end(BdrvTrackedRequest *req) static void tracked_request_begin(BdrvTrackedRequest *req, BlockDriverState *bs, int64_t offset, - uint64_t bytes, + int64_t bytes, enum BdrvTrackedRequestType type) { - assert(bytes <= INT64_MAX && offset <= INT64_MAX - bytes); + bdrv_check_request(offset, bytes, &error_abort); *req = (BdrvTrackedRequest){ .bs = bs, @@ -741,8 +741,10 @@ static void tracked_request_begin(BdrvTrackedRequest *req, } static bool tracked_request_overlaps(BdrvTrackedRequest *req, - int64_t offset, uint64_t bytes) + int64_t offset, int64_t bytes) { + bdrv_check_request(offset, bytes, &error_abort); + /* aaaa bbbb */ if (offset >= req->overlap_offset + req->overlap_bytes) { return false; @@ -810,8 +812,10 @@ static void tracked_request_set_serialising(BdrvTrackedRequest *req, uint64_t align) { int64_t overlap_offset = req->offset & ~(align - 1); - uint64_t overlap_bytes = ROUND_UP(req->offset + req->bytes, align) - - overlap_offset; + int64_t overlap_bytes = + ROUND_UP(req->offset + req->bytes, align) - overlap_offset; + + bdrv_check_request(req->offset, req->bytes, &error_abort); if (!req->serialising) { qatomic_inc(&req->bs->serialising_in_flight); -- cgit v1.1