On Wed, 01/27 18:59, Max Reitz wrote:
> Signed-off-by: Max Reitz <mre...@redhat.com>
> ---
> blockdev.c | 26 ++++++++++++++++++++++++++
> include/block/block_int.h | 4 ++++
> stubs/Makefile.objs | 1 +
> stubs/blockdev-close-all-bdrv-states.c | 5 +++++
> 4 files changed, 36 insertions(+)
> create mode 100644 stubs/blockdev-close-all-bdrv-states.c
>
> diff --git a/blockdev.c b/blockdev.c
> index 09d4621..ac93f43 100644
> --- a/blockdev.c
> +++ b/blockdev.c
> @@ -50,6 +50,9 @@
> #include "trace.h"
> #include "sysemu/arch_init.h"
>
> +static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
> + QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
> +
> static const char *const if_name[IF_COUNT] = {
> [IF_NONE] = "none",
> [IF_IDE] = "ide",
> @@ -702,6 +705,19 @@ fail:
> return NULL;
> }
>
> +void blockdev_close_all_bdrv_states(void)
> +{
> + BlockDriverState *bs, *next_bs;
> +
> + QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
> + AioContext *ctx = bdrv_get_aio_context(bs);
> +
> + aio_context_acquire(ctx);
> + bdrv_unref(bs);
> + aio_context_release(ctx);
> + }
> +}
> +
> static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
> Error **errp)
> {
> @@ -3875,12 +3891,15 @@ void qmp_blockdev_add(BlockdevOptions *options, Error
> **errp)
> if (!bs) {
> goto fail;
> }
> +
> + QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
> }
>
> if (bs && bdrv_key_required(bs)) {
> if (blk) {
> blk_unref(blk);
> } else {
> + QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
> bdrv_unref(bs);
> }
> error_setg(errp, "blockdev-add doesn't support encrypted devices");
> @@ -3945,11 +3964,18 @@ void qmp_x_blockdev_del(bool has_id, const char *id,
> bdrv_get_device_or_node_name(bs));
> goto out;
> }
> +
> + if (!blk && !bs->monitor_list.tqe_prev) {
> + error_setg(errp, "Node %s is not owned by the monitor",
> + bs->node_name);
> + goto out;
> + }
Is this an extra restriction added by this patch? Deserve some words in the
commit message?
> }
>
> if (blk) {
> blk_unref(blk);
> } else {
> + QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
> bdrv_unref(bs);
> }
>
> diff --git a/include/block/block_int.h b/include/block/block_int.h
> index 1e4c518..dd00d12 100644
> --- a/include/block/block_int.h
> +++ b/include/block/block_int.h
> @@ -445,6 +445,8 @@ struct BlockDriverState {
> QTAILQ_ENTRY(BlockDriverState) device_list;
> /* element of the list of all BlockDriverStates (all_bdrv_states) */
> QTAILQ_ENTRY(BlockDriverState) bs_list;
> + /* element of the list of monitor-owned BDS */
> + QTAILQ_ENTRY(BlockDriverState) monitor_list;
> QLIST_HEAD(, BdrvDirtyBitmap) dirty_bitmaps;
> int refcnt;
>
> @@ -707,4 +709,6 @@ bool bdrv_requests_pending(BlockDriverState *bs);
> void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out);
> void bdrv_undo_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *in);
>
> +void blockdev_close_all_bdrv_states(void);
> +
> #endif /* BLOCK_INT_H */
> diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
> index d7898a0..e922de9 100644
> --- a/stubs/Makefile.objs
> +++ b/stubs/Makefile.objs
> @@ -1,5 +1,6 @@
> stub-obj-y += arch-query-cpu-def.o
> stub-obj-y += bdrv-commit-all.o
> +stub-obj-y += blockdev-close-all-bdrv-states.o
> stub-obj-y += clock-warp.o
> stub-obj-y += cpu-get-clock.o
> stub-obj-y += cpu-get-icount.o
> diff --git a/stubs/blockdev-close-all-bdrv-states.c
> b/stubs/blockdev-close-all-bdrv-states.c
> new file mode 100644
> index 0000000..12d2442
> --- /dev/null
> +++ b/stubs/blockdev-close-all-bdrv-states.c
> @@ -0,0 +1,5 @@
> +#include "block/block_int.h"
> +
> +void blockdev_close_all_bdrv_states(void)
> +{
> +}
> --
> 2.7.0
>
