On 12/22/21 20:40, Vladimir Sementsov-Ogievskiy wrote:
Add function to wait for all intersecting requests. To be used in the further commit. Signed-off-by: Vladimir Sementsov-Ogievskiy<vsement...@virtuozzo.com> --- include/block/reqlist.h | 8 ++++++++ block/reqlist.c | 8 ++++++++ 2 files changed, 16 insertions(+) diff --git a/include/block/reqlist.h b/include/block/reqlist.h index b904d80216..4695623bb3 100644 --- a/include/block/reqlist.h +++ b/include/block/reqlist.h @@ -53,6 +53,14 @@ BlockReq *reqlist_find_conflict(BlockReqList *reqs, int64_t offset, bool coroutine_fn reqlist_wait_one(BlockReqList *reqs, int64_t offset, int64_t bytes, CoMutex *lock);+/*+ * Wait for all intersecting requests. It just calls reqlist_wait_one() in a + * loops, caller is responsible to stop producing new requests in this region + * in parallel, otherwise reqlist_wait_all() may never return. + */ +void coroutine_fn reqlist_wait_all(BlockReqList *reqs, int64_t offset, + int64_t bytes, CoMutex *lock); + /* * Shrink request and wake all waiting coroutines (may be some of them are not * intersecting with shrunk request). diff --git a/block/reqlist.c b/block/reqlist.c index 5e320ba649..52a362a1d8 100644 --- a/block/reqlist.c +++ b/block/reqlist.c @@ -57,6 +57,14 @@ bool coroutine_fn reqlist_wait_one(BlockReqList *reqs, int64_t offset, return true; }+void coroutine_fn reqlist_wait_all(BlockReqList *reqs, int64_t offset,+ int64_t bytes, CoMutex *lock) +{ + while (reqlist_wait_one(reqs, offset, bytes, lock)) { + /* continue */ + } +} + void coroutine_fn reqlist_shrink_req(BlockReq *req, int64_t new_bytes) { if (new_bytes == req->bytes) {
Reviewed-by: Nikita Lapshin<nikita.laps...@virtuozzo.com>
