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block/block-copy: factor out find_conflicting_inflight_req

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Split find_conflicting_inflight_req to be used separately.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200311103004.7649-6-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2020-03-11 13:30:00 +03:00 • committed by Max Reitz
parent 2d57511a88
commit 17187cb646
1 changed files with 18 additions and 11 deletions
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25
block/block-copy.c
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@ -24,24 +24,31 @@
#define BLOCK_COPY_MAX_BUFFER (1 * MiB) #define BLOCK_COPY_MAX_BUFFER (1 * MiB)
#define BLOCK_COPY_MAX_MEM (128 * MiB) #define BLOCK_COPY_MAX_MEM (128 * MiB)
static BlockCopyInFlightReq *find_conflicting_inflight_req(BlockCopyState *s,
int64_t start,
int64_t end)
{
BlockCopyInFlightReq *req;
QLIST_FOREACH(req, &s->inflight_reqs, list) {
if (end > req->start_byte && start < req->end_byte) {
return req;
}
}
return NULL;
}
static void coroutine_fn block_copy_wait_inflight_reqs(BlockCopyState *s, static void coroutine_fn block_copy_wait_inflight_reqs(BlockCopyState *s,
int64_t start, int64_t start,
int64_t end) int64_t end)
{ {
BlockCopyInFlightReq *req; BlockCopyInFlightReq *req;
bool waited;
do { while ((req = find_conflicting_inflight_req(s, start, end))) {
waited = false;
QLIST_FOREACH(req, &s->inflight_reqs, list) {
if (end > req->start_byte && start < req->end_byte) {
qemu_co_queue_wait(&req->wait_queue, NULL); qemu_co_queue_wait(&req->wait_queue, NULL);
waited = true;
break;
} }
} }
} while (waited);
}
static void block_copy_inflight_req_begin(BlockCopyState *s, static void block_copy_inflight_req_begin(BlockCopyState *s,
BlockCopyInFlightReq *req, BlockCopyInFlightReq *req,