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[PATCH 20/22] block: Protect bs->parents with graph_lock
From: |
Kevin Wolf |
Subject: |
[PATCH 20/22] block: Protect bs->parents with graph_lock |
Date: |
Fri, 29 Sep 2023 16:51:55 +0200 |
Almost all functions that access the parent link already take the graph
lock now. Add locking to the remaining user in a test case and finally
annotate the struct field itself as protected by the graph lock.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
include/block/block_int-common.h | 4 ++--
tests/unit/test-block-iothread.c | 5 +++++
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index 024262b5a2..0e37acd976 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -1043,7 +1043,7 @@ struct BdrvChild {
bool quiesced_parent;
QLIST_ENTRY(BdrvChild) next;
- QLIST_ENTRY(BdrvChild) next_parent;
+ QLIST_ENTRY(BdrvChild GRAPH_RDLOCK_PTR) next_parent;
};
/*
@@ -1180,7 +1180,7 @@ struct BlockDriverState {
BdrvChild *backing;
BdrvChild *file;
- QLIST_HEAD(, BdrvChild) parents;
+ QLIST_HEAD(, BdrvChild GRAPH_RDLOCK_PTR) parents;
QDict *options;
QDict *explicit_options;
diff --git a/tests/unit/test-block-iothread.c b/tests/unit/test-block-iothread.c
index 151049bda5..9b15d2768c 100644
--- a/tests/unit/test-block-iothread.c
+++ b/tests/unit/test-block-iothread.c
@@ -471,11 +471,16 @@ static void test_sync_op(const void *opaque)
BlockDriverState *bs;
BdrvChild *c;
+ GLOBAL_STATE_CODE();
+
blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
bs->total_sectors = 65536 / BDRV_SECTOR_SIZE;
blk_insert_bs(blk, bs, &error_abort);
+
+ bdrv_graph_rdlock_main_loop();
c = QLIST_FIRST(&bs->parents);
+ bdrv_graph_rdunlock_main_loop();
blk_set_aio_context(blk, ctx, &error_abort);
aio_context_acquire(ctx);
--
2.41.0
- [PATCH 12/22] block: Mark bdrv_get_parent_name() and callers GRAPH_RDLOCK, (continued)
- [PATCH 12/22] block: Mark bdrv_get_parent_name() and callers GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 13/22] block: Mark bdrv_amend_options() and callers GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 15/22] qcow2: Mark qcow2_inactivate() and callers GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 14/22] qcow2: Mark qcow2_signal_corruption() and callers GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 17/22] block: Mark bdrv_op_is_blocked() and callers GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 16/22] qcow2: Mark check_constraints_on_bitmap() GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 11/22] block: Mark bdrv_primary_child() and callers GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 18/22] block: Mark bdrv_apply_auto_read_only() and callers GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 21/22] block: Protect bs->children with graph_lock, Kevin Wolf, 2023/09/29
- [PATCH 19/22] block: Mark bdrv_get_specific_info() and callers GRAPH_RDLOCK, Kevin Wolf, 2023/09/29
- [PATCH 20/22] block: Protect bs->parents with graph_lock,
Kevin Wolf <=
- [PATCH 22/22] block: Add assertion for bdrv_graph_wrlock(), Kevin Wolf, 2023/09/29