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[PULL 16/23] block/reqlist: add reqlist_wait_all()
From: |
Hanna Reitz |
Subject: |
[PULL 16/23] block/reqlist: add reqlist_wait_all() |
Date: |
Mon, 7 Mar 2022 11:35:42 +0100 |
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Add function to wait for all intersecting requests.
To be used in the further commit.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Nikita Lapshin <nikita.lapshin@virtuozzo.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220303194349.2304213-10-vsementsov@virtuozzo.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.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 0fa1eef259..5253497bae 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
+ * loop, 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 (maybe some of them are not
* intersecting with shrunk request).
diff --git a/block/reqlist.c b/block/reqlist.c
index 09fecbd48c..08cb57cfa4 100644
--- a/block/reqlist.c
+++ b/block/reqlist.c
@@ -58,6 +58,14 @@ 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) {
--
2.34.1
- [PULL 01/23] ide: Increment BB in-flight counter for TRIM BH, (continued)
- [PULL 01/23] ide: Increment BB in-flight counter for TRIM BH, Hanna Reitz, 2022/03/07
- [PULL 02/23] block/curl.c: Set error message string if curl_init_state() fails, Hanna Reitz, 2022/03/07
- [PULL 03/23] block/curl.c: Check error return from curl_easy_setopt(), Hanna Reitz, 2022/03/07
- [PULL 07/23] iotests: Write test output to TEST_DIR, Hanna Reitz, 2022/03/07
- [PULL 06/23] tests/qemu-iotests/testrunner: Quote "case not run" lines in TAP mode, Hanna Reitz, 2022/03/07
- [PULL 09/23] block/dirty-bitmap: bdrv_merge_dirty_bitmap(): add return value, Hanna Reitz, 2022/03/07
- [PULL 10/23] block/block-copy: block_copy_state_new(): add bitmap parameter, Hanna Reitz, 2022/03/07
- [PULL 12/23] block/block-copy: add block_copy_reset(), Hanna Reitz, 2022/03/07
- [PULL 13/23] block: intoduce reqlist, Hanna Reitz, 2022/03/07
- [PULL 11/23] block/copy-before-write: add bitmap open parameter, Hanna Reitz, 2022/03/07
- [PULL 16/23] block/reqlist: add reqlist_wait_all(),
Hanna Reitz <=
- [PULL 17/23] block/io: introduce block driver snapshot-access API, Hanna Reitz, 2022/03/07
- [PULL 22/23] iotests/image-fleecing: add test case with bitmap, Hanna Reitz, 2022/03/07
- [PULL 14/23] block/reqlist: reqlist_find_conflict(): use ranges_overlap(), Hanna Reitz, 2022/03/07
- [PULL 18/23] block: introduce snapshot-access block driver, Hanna Reitz, 2022/03/07
- [PULL 20/23] iotests/image-fleecing: add test-case for fleecing format node, Hanna Reitz, 2022/03/07
- [PULL 21/23] iotests.py: add qemu_io_pipe_and_status(), Hanna Reitz, 2022/03/07
- [PULL 15/23] block/dirty-bitmap: introduce bdrv_dirty_bitmap_status(), Hanna Reitz, 2022/03/07
- [PULL 19/23] block: copy-before-write: realize snapshot-access API, Hanna Reitz, 2022/03/07
- [PULL 23/23] iotests/image-fleecing: test push backup with fleecing, Hanna Reitz, 2022/03/07
- [PULL 08/23] block/block-copy: move copy_bitmap initialization to block_copy_state_new(), Hanna Reitz, 2022/03/07