diff options
author | Max Reitz <mreitz@redhat.com> | 2016-01-29 16:36:12 +0100 |
---|---|---|
committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:30:22 -0600 |
commit | c346474ae671c06f738c07ca3c7b0c6e8ee0fc5f (patch) | |
tree | 121a41afc280c7a5f3c07575d1985b09321ba57b /blockdev.c | |
parent | 1fc89ca91b21ee7a70da6936316bfa3ceafb921f (diff) | |
download | hqemu-c346474ae671c06f738c07ca3c7b0c6e8ee0fc5f.zip hqemu-c346474ae671c06f738c07ca3c7b0c6e8ee0fc5f.tar.gz |
blockdev: Keep track of monitor-owned BDS
As a side effect, we can now make x-blockdev-del's check whether a BDS
is actually owned by the monitor explicit.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'blockdev.c')
-rw-r--r-- | blockdev.c | 28 |
1 files changed, 27 insertions, 1 deletions
@@ -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"); @@ -3940,7 +3959,13 @@ void qmp_x_blockdev_del(bool has_id, const char *id, goto out; } - if (bs->refcnt > 1 || !QLIST_EMPTY(&bs->parents)) { + if (!blk && !bs->monitor_list.tqe_prev) { + error_setg(errp, "Node %s is not owned by the monitor", + bs->node_name); + goto out; + } + + if (bs->refcnt > 1) { error_setg(errp, "Block device %s is in use", bdrv_get_device_or_node_name(bs)); goto out; @@ -3950,6 +3975,7 @@ void qmp_x_blockdev_del(bool has_id, const char *id, if (blk) { blk_unref(blk); } else { + QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list); bdrv_unref(bs); } |