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[Qemu-devel] [PATCH v8 3/9] quorum: set supported write/zero flags
From: |
Anton Nefedov |
Subject: |
[Qemu-devel] [PATCH v8 3/9] quorum: set supported write/zero flags |
Date: |
Mon, 12 Mar 2018 13:16:52 +0300 |
Signed-off-by: Anton Nefedov <address@hidden>
---
block/quorum.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/block/quorum.c b/block/quorum.c
index 14333c1..dc77a23 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -867,6 +867,20 @@ static QemuOptsList quorum_runtime_opts = {
},
};
+static void quorum_set_supported_flags(BlockDriverState *bs)
+{
+ BDRVQuorumState *s = bs->opaque;
+ int i;
+
+ bs->supported_write_flags = BDRV_REQ_FUA;
+ bs->supported_zero_flags = BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP;
+
+ for (i = 0; i < s->num_children; i++) {
+ bs->supported_write_flags &= s->children[i]->bs->supported_write_flags;
+ bs->supported_zero_flags &= s->children[i]->bs->supported_zero_flags;
+ }
+}
+
static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
@@ -961,6 +975,8 @@ static int quorum_open(BlockDriverState *bs, QDict
*options, int flags,
}
s->next_child_index = s->num_children;
+ quorum_set_supported_flags(bs);
+
g_free(opened);
goto exit;
@@ -1029,6 +1045,8 @@ static void quorum_add_child(BlockDriverState *bs,
BlockDriverState *child_bs,
s->children = g_renew(BdrvChild *, s->children, s->num_children + 1);
s->children[s->num_children++] = child;
+ quorum_set_supported_flags(bs);
+
out:
bdrv_drained_end(bs);
}
@@ -1064,6 +1082,8 @@ static void quorum_del_child(BlockDriverState *bs,
BdrvChild *child,
bdrv_unref_child(bs, child);
bdrv_drained_end(bs);
+
+ quorum_set_supported_flags(bs);
}
static void quorum_refresh_filename(BlockDriverState *bs, QDict *options)
--
2.7.4
- [Qemu-devel] [PATCH v8 0/9] qcow2: cluster space preallocation, Anton Nefedov, 2018/03/12
- [Qemu-devel] [PATCH v8 2/9] blkverify: set supported write/zero flags, Anton Nefedov, 2018/03/12
- [Qemu-devel] [PATCH v8 1/9] mirror: inherit supported write/zero flags, Anton Nefedov, 2018/03/12
- [Qemu-devel] [PATCH v8 3/9] quorum: set supported write/zero flags,
Anton Nefedov <=
- [Qemu-devel] [PATCH v8 4/9] block: introduce BDRV_REQ_ALLOCATE flag, Anton Nefedov, 2018/03/12
- [Qemu-devel] [PATCH v8 6/9] file-posix: support BDRV_REQ_ALLOCATE, Anton Nefedov, 2018/03/12
- [Qemu-devel] [PATCH v8 5/9] block: treat BDRV_REQ_ALLOCATE as serialising, Anton Nefedov, 2018/03/12
- [Qemu-devel] [PATCH v8 7/9] block: support BDRV_REQ_ALLOCATE in passthrough drivers, Anton Nefedov, 2018/03/12