From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: qemu-devel@nongnu.org, armbru@redhat.com, eblake@redhat.com,
ehabkost@redhat.com, berrange@redhat.com, pbonzini@redhat.com,
vsementsov@virtuozzo.com, jsnow@redhat.com, mreitz@redhat.com,
kwolf@redhat.com, den@openvz.org
Subject: [PATCH] block/copy-on-read: use bdrv_drop_filter() and drop s->active
Date: Mon, 17 May 2021 09:44:07 +0300 [thread overview]
Message-ID: <20210517064428.16223-2-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <20210517064428.16223-1-vsementsov@virtuozzo.com>
Now, after huge update of block graph permission update algorithm, we
don't need this workaround with active state of the filter. Drop it and
use new smart bdrv_drop_filter() function.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block/copy-on-read.c | 33 +--------------------------------
1 file changed, 1 insertion(+), 32 deletions(-)
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index 9cad9e1b8c..c428682272 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -29,7 +29,6 @@
typedef struct BDRVStateCOR {
- bool active;
BlockDriverState *bottom_bs;
bool chain_frozen;
} BDRVStateCOR;
@@ -89,7 +88,6 @@ static int cor_open(BlockDriverState *bs, QDict *options, int flags,
*/
bdrv_ref(bottom_bs);
}
- state->active = true;
state->bottom_bs = bottom_bs;
/*
@@ -112,17 +110,6 @@ static void cor_child_perm(BlockDriverState *bs, BdrvChild *c,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
- BDRVStateCOR *s = bs->opaque;
-
- if (!s->active) {
- /*
- * While the filter is being removed
- */
- *nperm = 0;
- *nshared = BLK_PERM_ALL;
- return;
- }
-
*nperm = perm & PERM_PASSTHROUGH;
*nshared = (shared & PERM_PASSTHROUGH) | PERM_UNCHANGED;
@@ -280,32 +267,14 @@ static BlockDriver bdrv_copy_on_read = {
void bdrv_cor_filter_drop(BlockDriverState *cor_filter_bs)
{
- BdrvChild *child;
- BlockDriverState *bs;
BDRVStateCOR *s = cor_filter_bs->opaque;
- child = bdrv_filter_child(cor_filter_bs);
- if (!child) {
- return;
- }
- bs = child->bs;
-
- /* Retain the BDS until we complete the graph change. */
- bdrv_ref(bs);
- /* Hold a guest back from writing while permissions are being reset. */
- bdrv_drained_begin(bs);
- /* Drop permissions before the graph change. */
- s->active = false;
/* unfreeze, as otherwise bdrv_replace_node() will fail */
if (s->chain_frozen) {
s->chain_frozen = false;
bdrv_unfreeze_backing_chain(cor_filter_bs, s->bottom_bs);
}
- bdrv_child_refresh_perms(cor_filter_bs, child, &error_abort);
- bdrv_replace_node(cor_filter_bs, bs, &error_abort);
-
- bdrv_drained_end(bs);
- bdrv_unref(bs);
+ bdrv_drop_filter(cor_filter_bs, &error_abort);
bdrv_unref(cor_filter_bs);
}
--
2.29.2
next prev parent reply other threads:[~2021-05-17 6:47 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 6:44 [PATCH 00/21] block: publish backup-top filter Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` Vladimir Sementsov-Ogievskiy [this message]
2021-05-17 6:44 ` [PATCH 01/21] block: introduce bdrv_replace_child_bs() Vladimir Sementsov-Ogievskiy
2021-05-17 12:09 ` Max Reitz
2021-05-17 14:30 ` Vladimir Sementsov-Ogievskiy
2021-05-17 15:51 ` Max Reitz
2021-05-17 18:05 ` Vladimir Sementsov-Ogievskiy
2021-05-19 10:12 ` Vladimir Sementsov-Ogievskiy
2021-05-19 11:11 ` Max Reitz
2021-05-19 11:14 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 02/21] block: introduce blk_replace_bs Vladimir Sementsov-Ogievskiy
2021-05-17 12:32 ` Max Reitz
2021-05-17 6:44 ` [PATCH 03/21] qdev-properties: PropertyInfo: add realized_set_allowed field Vladimir Sementsov-Ogievskiy
2021-05-17 12:40 ` Max Reitz
2021-05-17 14:33 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 04/21] qdev: allow setting drive property for realized device Vladimir Sementsov-Ogievskiy
2021-05-17 15:48 ` Max Reitz
2021-05-17 18:09 ` Vladimir Sementsov-Ogievskiy
2021-05-18 9:09 ` Max Reitz
2021-05-18 9:20 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 05/21] block: rename backup-top to copy-before-write Vladimir Sementsov-Ogievskiy
2021-05-17 16:05 ` Max Reitz
2021-05-17 19:42 ` Vladimir Sementsov-Ogievskiy
2021-05-18 9:37 ` Max Reitz
2021-05-17 6:44 ` [PATCH 06/21] block/backup: drop support for copy_range Vladimir Sementsov-Ogievskiy
2021-05-17 16:20 ` Max Reitz
2021-05-17 6:44 ` [PATCH 07/21] block-copy: always set BDRV_REQ_SERIALISING flag Vladimir Sementsov-Ogievskiy
2021-05-17 16:46 ` Max Reitz
2021-05-17 6:44 ` [PATCH 08/21] block/backup: stricter backup_calculate_cluster_size() Vladimir Sementsov-Ogievskiy
2021-05-17 16:57 ` Max Reitz
2021-05-17 19:53 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 09/21] block/backup: move cluster size calculation to block-copy Vladimir Sementsov-Ogievskiy
2021-05-17 17:09 ` Max Reitz
2021-05-17 6:44 ` [PATCH 10/21] block/copy-before-write: relax permission requirements when no parents Vladimir Sementsov-Ogievskiy
2021-05-18 11:10 ` Max Reitz
2021-05-18 12:16 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 11/21] block/copy-before-write: use file child instead of backing Vladimir Sementsov-Ogievskiy
2021-05-18 11:47 ` Max Reitz
2021-05-18 12:21 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 12/21] block/copy-before-write: bdrv_cbw_append(): replace child at last Vladimir Sementsov-Ogievskiy
2021-05-18 12:35 ` Max Reitz
2021-05-17 6:44 ` [PATCH 13/21] block/copy-before-write: introduce cbw_init() Vladimir Sementsov-Ogievskiy
2021-05-18 12:53 ` Max Reitz
2021-05-17 6:44 ` [PATCH 14/21] block/copy-before-write: cbw_init(): rename variables Vladimir Sementsov-Ogievskiy
2021-05-18 13:01 ` Max Reitz
2021-05-17 6:44 ` [PATCH 15/21] block/copy-before-write: cbw_init(): use file child after attaching Vladimir Sementsov-Ogievskiy
2021-05-18 13:43 ` Max Reitz
2021-05-17 6:44 ` [PATCH 16/21] block/copy-before-write: cbw_init(): use options Vladimir Sementsov-Ogievskiy
2021-05-18 13:56 ` Max Reitz
2021-05-18 14:24 ` Vladimir Sementsov-Ogievskiy
2021-05-18 14:29 ` Max Reitz
2021-05-18 14:32 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 17/21] block/block-copy: switch to fully set bitmap by default Vladimir Sementsov-Ogievskiy
2021-05-18 14:22 ` Max Reitz
2021-05-18 14:31 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 18/21] block/block-copy: make setting progress optional Vladimir Sementsov-Ogievskiy
2021-05-18 14:26 ` Max Reitz
2021-05-18 14:35 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 19/21] block/copy-before-write: make public block driver Vladimir Sementsov-Ogievskiy
2021-05-18 14:46 ` Max Reitz
2021-05-17 6:44 ` [PATCH 20/21] qapi: publish copy-before-write filter Vladimir Sementsov-Ogievskiy
2021-05-18 14:48 ` Max Reitz
2021-05-18 14:56 ` Vladimir Sementsov-Ogievskiy
2021-05-17 6:44 ` [PATCH 21/21] itotests/222: add test-case for " Vladimir Sementsov-Ogievskiy
2021-05-18 15:24 ` Max Reitz
2021-05-18 15:41 ` Vladimir Sementsov-Ogievskiy
-- strict thread matches above, loose matches on Subject: below --
2021-05-06 19:41 [PATCH] block/copy-on-read: use bdrv_drop_filter() and drop s->active Vladimir Sementsov-Ogievskiy
2021-05-07 16:45 ` Max Reitz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210517064428.16223-2-vsementsov@virtuozzo.com \
--to=vsementsov@virtuozzo.com \
--cc=armbru@redhat.com \
--cc=berrange@redhat.com \
--cc=den@openvz.org \
--cc=eblake@redhat.com \
--cc=ehabkost@redhat.com \
--cc=jsnow@redhat.com \
--cc=kwolf@redhat.com \
--cc=mreitz@redhat.com \
--cc=pbonzini@redhat.com \
--cc=qemu-block@nongnu.org \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).