On 18.07.24 14:48, Markus Armbruster wrote:
Vladimir Sementsov-Ogievskiy <vsement...@yandex-team.ru> writes:
We need it for further blockdev-replace functionality.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@yandex-team.ru>
---
block/export/export.c | 18 ++++++++++++++++++
include/sysemu/block-backend-global-state.h | 1 +
2 files changed, 19 insertions(+)
diff --git a/block/export/export.c b/block/export/export.c
index 6d51ae8ed7..57beae7982 100644
--- a/block/export/export.c
+++ b/block/export/export.c
@@ -355,3 +355,21 @@ BlockExportInfoList *qmp_query_block_exports(Error **errp)
return head;
}
+
+BlockBackend *blk_by_export_id(const char *id, Error **errp)
+{
+ BlockExport *exp;
+
+ exp = blk_exp_find(id);
+ if (exp == NULL) {
+ error_setg(errp, "Export '%s' not found", id);
+ return NULL;
+ }
+
+ if (!exp->blk) {
+ error_setg(errp, "Export '%s' is empty", id);
Can this happen?
Hmm, looking at the code in blk_exp_add:
assert(exp->blk != NULL);
QLIST_INSERT_HEAD(&block_exports, exp, next);
return exp;
seems not. And I can't find anything changing exp->blk except for blk_exp_add().
Will switch to assertion.
+ return NULL;
+ }
+
+ return exp->blk;
+}
diff --git a/include/sysemu/block-backend-global-state.h
b/include/sysemu/block-backend-global-state.h
index ccb35546a1..410d0cc5c7 100644
--- a/include/sysemu/block-backend-global-state.h
+++ b/include/sysemu/block-backend-global-state.h
@@ -74,6 +74,7 @@ void blk_detach_dev(BlockBackend *blk, DeviceState *dev);
DeviceState *blk_get_attached_dev(BlockBackend *blk);
BlockBackend *blk_by_dev(void *dev);
BlockBackend *blk_by_qdev_id(const char *id, Error **errp);
+BlockBackend *blk_by_export_id(const char *id, Error **errp);
void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
void blk_activate(BlockBackend *blk, Error **errp);
--
Best regards,
Vladimir
