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Block layer patches

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- Clean up coroutine versions of bdrv_{is_allocated,block_status}*
 - Graph locking part 5 (protect children/parent links)
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Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging

Block layer patches

- Clean up coroutine versions of bdrv_{is_allocated,block_status}*
- Graph locking part 5 (protect children/parent links)

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# gpg: Signature made Thu 12 Oct 2023 12:20:15 EDT
# gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg:                issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* tag 'for-upstream' of https://repo.or.cz/qemu/kevin: (26 commits)
  block: Add assertion for bdrv_graph_wrlock()
  block: Protect bs->children with graph_lock
  block: Protect bs->parents with graph_lock
  block: Mark bdrv_get_specific_info() and callers GRAPH_RDLOCK
  block: Mark bdrv_apply_auto_read_only() and callers GRAPH_RDLOCK
  block: Mark bdrv_op_is_blocked() and callers GRAPH_RDLOCK
  qcow2: Mark check_constraints_on_bitmap() GRAPH_RDLOCK
  qcow2: Mark qcow2_inactivate() and callers GRAPH_RDLOCK
  qcow2: Mark qcow2_signal_corruption() and callers GRAPH_RDLOCK
  block: Mark bdrv_amend_options() and callers GRAPH_RDLOCK
  block: Mark bdrv_get_parent_name() and callers GRAPH_RDLOCK
  block: Mark bdrv_primary_child() and callers GRAPH_RDLOCK
  block: Mark bdrv_refresh_filename() and callers GRAPH_RDLOCK
  block: Mark bdrv_get_xdbg_block_graph() and callers GRAPH_RDLOCK
  block: Take graph rdlock in parts of reopen
  block: Mark bdrv_snapshot_fallback() and callers GRAPH_RDLOCK
  block: Mark bdrv_parent_cb_resize() and callers GRAPH_RDLOCK
  block: Mark drain related functions GRAPH_RDLOCK
  block: Mark bdrv_first_blk() and bdrv_is_root_node() GRAPH_RDLOCK
  block: Take graph rdlock in bdrv_inactivate_all()
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2023-10-16 12:34:45 -04:00
commit ce2f51697b
60 changed files with 842 additions and 498 deletions
Download patch file Download diff file Expand all files Collapse all files

15
tests/unit/test-bdrv-drain.c
View file

@ -1034,9 +1034,13 @@ static void coroutine_fn test_co_delete_by_drain(void *opaque)
blk_co_unref(blk);
} else {
BdrvChild *c, *next_c;
bdrv_graph_co_rdlock();
QLIST_FOREACH_SAFE(c, &bs->children, next, next_c) {
bdrv_graph_co_rdunlock();
bdrv_co_unref_child(bs, c);
bdrv_graph_co_rdlock();
}
bdrv_graph_co_rdunlock();
}
dbdd->done = true;
@ -1168,7 +1172,7 @@ struct detach_by_parent_data {
};
static struct detach_by_parent_data detach_by_parent_data;
static void detach_indirect_bh(void *opaque)
static void no_coroutine_fn detach_indirect_bh(void *opaque)
{
struct detach_by_parent_data *data = opaque;
@ -1184,18 +1188,19 @@ static void detach_indirect_bh(void *opaque)
bdrv_graph_wrunlock();
}
static void detach_by_parent_aio_cb(void *opaque, int ret)
static void coroutine_mixed_fn detach_by_parent_aio_cb(void *opaque, int ret)
{
struct detach_by_parent_data *data = &detach_by_parent_data;
g_assert_cmpint(ret, ==, 0);
if (data->by_parent_cb) {
bdrv_inc_in_flight(data->child_b->bs);
detach_indirect_bh(data);
aio_bh_schedule_oneshot(qemu_get_current_aio_context(),
detach_indirect_bh, &detach_by_parent_data);
}
}
static void detach_by_driver_cb_drained_begin(BdrvChild *child)
static void GRAPH_RDLOCK detach_by_driver_cb_drained_begin(BdrvChild *child)
{
struct detach_by_parent_data *data = &detach_by_parent_data;
@ -1232,7 +1237,7 @@ static BdrvChildClass detach_by_driver_cb_class;
* state is messed up, but if it is only polled in the single
* BDRV_POLL_WHILE() at the end of the drain, this should work fine.
*/
static void test_detach_indirect(bool by_parent_cb)
static void TSA_NO_TSA test_detach_indirect(bool by_parent_cb)
{
BlockBackend *blk;
BlockDriverState *parent_a, *parent_b, *a, *b, *c;

8
tests/unit/test-block-iothread.c
View file

@ -383,6 +383,9 @@ static void test_sync_op_check(BdrvChild *c)
static void test_sync_op_activate(BdrvChild *c)
{
GLOBAL_STATE_CODE();
GRAPH_RDLOCK_GUARD_MAINLOOP();
/* Early success: Image is not inactive */
bdrv_activate(c->bs, NULL);
}
@ -468,11 +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);