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[PULL v3 17/19] qcow2-bitmap: move bitmap reopen-rw code to qcow2_reopen
From: |
John Snow |
Subject: |
[PULL v3 17/19] qcow2-bitmap: move bitmap reopen-rw code to qcow2_reopen_commit |
Date: |
Thu, 17 Oct 2019 17:54:34 -0400 |
From: Vladimir Sementsov-Ogievskiy <address@hidden>
The only reason I can imagine for this strange code at the very-end of
bdrv_reopen_commit is the fact that bs->read_only updated after
calling drv->bdrv_reopen_commit in bdrv_reopen_commit. And in the same
time, prior to previous commit, qcow2_reopen_bitmaps_rw did a wrong
check for being writable, when actually it only need writable file
child not self.
So, as it's fixed, let's move things to correct place.
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
Reviewed-by: John Snow <address@hidden>
Acked-by: Max Reitz <address@hidden>
Message-id: address@hidden
Signed-off-by: John Snow <address@hidden>
---
include/block/block_int.h | 6 ------
block.c | 19 -------------------
block/qcow2.c | 15 ++++++++++++++-
3 files changed, 14 insertions(+), 26 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 32fb493cbb..ca4ccac4c1 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -547,12 +547,6 @@ struct BlockDriver {
uint64_t parent_perm, uint64_t parent_shared,
uint64_t *nperm, uint64_t *nshared);
- /**
- * Bitmaps should be marked as 'IN_USE' in the image on reopening image
- * as rw. This handler should realize it. It also should unset readonly
- * field of BlockDirtyBitmap's in case of success.
- */
- int (*bdrv_reopen_bitmaps_rw)(BlockDriverState *bs, Error **errp);
bool (*bdrv_co_can_store_new_dirty_bitmap)(BlockDriverState *bs,
const char *name,
uint32_t granularity,
diff --git a/block.c b/block.c
index cf312258a9..dad5a3d8e0 100644
--- a/block.c
+++ b/block.c
@@ -3935,16 +3935,12 @@ void bdrv_reopen_commit(BDRVReopenState *reopen_state)
BlockDriver *drv;
BlockDriverState *bs;
BdrvChild *child;
- bool old_can_write, new_can_write;
assert(reopen_state != NULL);
bs = reopen_state->bs;
drv = bs->drv;
assert(drv != NULL);
- old_can_write =
- !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE);
-
/* If there are any driver level actions to take */
if (drv->bdrv_reopen_commit) {
drv->bdrv_reopen_commit(reopen_state);
@@ -3988,21 +3984,6 @@ void bdrv_reopen_commit(BDRVReopenState *reopen_state)
}
bdrv_refresh_limits(bs, NULL);
-
- new_can_write =
- !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE);
- if (!old_can_write && new_can_write && drv->bdrv_reopen_bitmaps_rw) {
- Error *local_err = NULL;
- if (drv->bdrv_reopen_bitmaps_rw(bs, &local_err) < 0) {
- /* This is not fatal, bitmaps just left read-only, so all following
- * writes will fail. User can remove read-only bitmaps to unblock
- * writes.
- */
- error_reportf_err(local_err,
- "%s: Failed to make dirty bitmaps writable: ",
- bdrv_get_node_name(bs));
- }
- }
}
/*
diff --git a/block/qcow2.c b/block/qcow2.c
index 53a025703e..8b05933565 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1835,6 +1835,20 @@ fail:
static void qcow2_reopen_commit(BDRVReopenState *state)
{
qcow2_update_options_commit(state->bs, state->opaque);
+ if (state->flags & BDRV_O_RDWR) {
+ Error *local_err = NULL;
+
+ if (qcow2_reopen_bitmaps_rw(state->bs, &local_err) < 0) {
+ /*
+ * This is not fatal, bitmaps just left read-only, so all following
+ * writes will fail. User can remove read-only bitmaps to unblock
+ * writes or retry reopen.
+ */
+ error_reportf_err(local_err,
+ "%s: Failed to make dirty bitmaps writable: ",
+ bdrv_get_node_name(state->bs));
+ }
+ }
g_free(state->opaque);
}
@@ -5406,7 +5420,6 @@ BlockDriver bdrv_qcow2 = {
.bdrv_detach_aio_context = qcow2_detach_aio_context,
.bdrv_attach_aio_context = qcow2_attach_aio_context,
- .bdrv_reopen_bitmaps_rw = qcow2_reopen_bitmaps_rw,
.bdrv_co_can_store_new_dirty_bitmap = qcow2_co_can_store_new_dirty_bitmap,
.bdrv_co_remove_persistent_dirty_bitmap =
qcow2_co_remove_persistent_dirty_bitmap,
--
2.21.0
- [PULL v3 06/19] block/dirty-bitmap: add bs link, (continued)
- [PULL v3 06/19] block/dirty-bitmap: add bs link, John Snow, 2019/10/17
- [PULL v3 08/19] block/dirty-bitmap: refactor bdrv_dirty_bitmap_next, John Snow, 2019/10/17
- [PULL v3 10/19] block: reverse order for reopen commits, John Snow, 2019/10/17
- [PULL v3 09/19] block: switch reopen queue from QSIMPLEQ to QTAILQ, John Snow, 2019/10/17
- [PULL v3 12/19] block/qcow2-bitmap: get rid of bdrv_has_changed_persistent_bitmaps, John Snow, 2019/10/17
- [PULL v3 11/19] iotests: add test-case to 165 to test reopening qcow2 bitmaps to RW, John Snow, 2019/10/17
- [PULL v3 13/19] block/qcow2-bitmap: drop qcow2_reopen_bitmaps_rw_hint(), John Snow, 2019/10/17
- [PULL v3 15/19] iotests: add test 260 to check bitmap life after snapshot + commit, John Snow, 2019/10/17
- [PULL v3 14/19] block/qcow2-bitmap: do not remove bitmaps on reopen-ro, John Snow, 2019/10/17
- [PULL v3 16/19] block/qcow2-bitmap: fix and improve qcow2_reopen_bitmaps_rw, John Snow, 2019/10/17
- [PULL v3 17/19] qcow2-bitmap: move bitmap reopen-rw code to qcow2_reopen_commit,
John Snow <=
- [PULL v3 18/19] MAINTAINERS: Add Vladimir as a reviewer for bitmaps, John Snow, 2019/10/17
- [PULL v3 19/19] dirty-bitmaps: remove deprecated autoload parameter, John Snow, 2019/10/17
- Re: [PULL v3 00/19] Bitmaps patches, Peter Maydell, 2019/10/18