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[PATCH 21/22] parallels: naive implementation of parallels_co_pwrite_zer
From: |
Denis V. Lunev |
Subject: |
[PATCH 21/22] parallels: naive implementation of parallels_co_pwrite_zeroes |
Date: |
Mon, 18 Sep 2023 20:00:59 +0200 |
The zero flag is missed in the Parallels format specification. We can
resort to discard if we have no backing file.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
---
block/parallels.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/block/parallels.c b/block/parallels.c
index 1ef23f6669..a6d64d0d47 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -582,6 +582,19 @@ done:
return ret;
}
+static int coroutine_fn
+parallels_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ BdrvRequestFlags flags)
+{
+ /*
+ * The zero flag is missed in the Parallels format specification. We can
+ * resort to discard if we have no backing file (this condition is checked
+ * inside parallels_co_pdiscard().
+ */
+ return parallels_co_pdiscard(bs, offset, bytes);
+}
+
+
static void parallels_check_unclean(BlockDriverState *bs,
BdrvCheckResult *res,
BdrvCheckMode fix)
@@ -1463,6 +1476,7 @@ static BlockDriver bdrv_parallels = {
.bdrv_co_create_opts = parallels_co_create_opts,
.bdrv_co_check = parallels_co_check,
.bdrv_co_pdiscard = parallels_co_pdiscard,
+ .bdrv_co_pwrite_zeroes = parallels_co_pwrite_zeroes,
};
static void bdrv_parallels_init(void)
--
2.34.1
- [PATCH 06/22] parallels: return earlier from parallels_open() function on error, (continued)
- [PATCH 06/22] parallels: return earlier from parallels_open() function on error, Denis V. Lunev, 2023/09/18
- [PATCH 04/22] parallels: invent parallels_opts_prealloc() helper to parse prealloc opts, Denis V. Lunev, 2023/09/18
- [PATCH 08/22] parallels: create mark_used() helper which sets bit in used bitmap, Denis V. Lunev, 2023/09/18
- [PATCH 3/3] tests: extend test 131 to cover availability of the write-zeroes, Denis V. Lunev, 2023/09/18
- [PATCH 01/22] parallels: fix formatting in bdrv_parallels initialization, Denis V. Lunev, 2023/09/18
- [PATCH 18/22] parallels: improve readability of allocate_clusters, Denis V. Lunev, 2023/09/18
- [PATCH 17/22] parallels: naive implementation of allocate_clusters with used bitmap, Denis V. Lunev, 2023/09/18
- [PATCH 15/22] parallels: accept multiple clusters in mark_used(), Denis V. Lunev, 2023/09/18
- [PATCH 21/22] parallels: naive implementation of parallels_co_pwrite_zeroes,
Denis V. Lunev <=
- [PATCH 16/22] parallels: update used bitmap in allocate_cluster, Denis V. Lunev, 2023/09/18
- [PATCH 13/22] tests: fix broken deduplication check in parallels format test, Denis V. Lunev, 2023/09/18
- [PATCH 22/22] tests: extend test 131 to cover availability of the write-zeroes, Denis V. Lunev, 2023/09/18
- [PATCH 14/22] tests: test self-cure of parallels image with duplicated clusters, Denis V. Lunev, 2023/09/18
- [PATCH 11/22] parallels: add test which will validate data_off fixes through repair, Denis V. Lunev, 2023/09/18
- [PATCH 20/22] tests: extend test 131 to cover availability of the discard operation, Denis V. Lunev, 2023/09/18
- [PATCH 10/22] parallels: fix broken parallels_check_data_off(), Denis V. Lunev, 2023/09/18
- [PATCH 09/22] tests: ensure that image validation will not cure the corruption, Denis V. Lunev, 2023/09/18
- [PATCH 19/22] parallels: naive implementation of parallels_co_pdiscard, Denis V. Lunev, 2023/09/18