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block/export: Add query-block-exports 

This adds a simple QMP command to query the list of block exports.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200924152717.287415-25-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2020-09-24 17:27:10 +02:00
parent 331170e073
commit 8cade320c8
2 changed files with 55 additions and 0 deletions
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23
block/export/export.c
View File

@ -286,3 +286,26 @@ void qmp_block_export_del(const char *id,
blk_exp_request_shutdown(exp);
}
BlockExportInfoList *qmp_query_block_exports(Error **errp)
{
BlockExportInfoList *head = NULL, **p_next = &head;
BlockExport *exp;
QLIST_FOREACH(exp, &block_exports, next) {
BlockExportInfoList *entry = g_new0(BlockExportInfoList, 1);
BlockExportInfo *info = g_new(BlockExportInfo, 1);
*info = (BlockExportInfo) {
.id = g_strdup(exp->id),
.type = exp->drv->type,
.node_name = g_strdup(bdrv_get_node_name(blk_bs(exp->blk))),
.shutting_down = !exp->user_owned,
};
entry->value = info;
*p_next = entry;
p_next = &entry->next;
}
return head;
}

32
qapi/block-export.json
View File

@ -245,3 +245,35 @@
##
{ 'event': 'BLOCK_EXPORT_DELETED',
'data': { 'id': 'str' } }
##
# @BlockExportInfo:
#
# Information about a single block export.
#
# @id: The unique identifier for the block export
#
# @type: The block export type
#
# @node-name: The node name of the block node that is exported
#
# @shutting-down: True if the export is shutting down (e.g. after a
# block-export-del command, but before the shutdown has
# completed)
#
# Since: 5.2
##
{ 'struct': 'BlockExportInfo',
'data': { 'id': 'str',
'type': 'BlockExportType',
'node-name': 'str',
'shutting-down': 'bool' } }
##
# @query-block-exports:
#
# Returns: A list of BlockExportInfo describing all block exports
#
# Since: 5.2
##
{ 'command': 'query-block-exports', 'returns': ['BlockExportInfo'] }