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[PATCH v4 34/45] block/export: add blk_by_export_id()
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[PATCH v4 34/45] block/export: add blk_by_export_id() |
Date: |
Tue, 29 Mar 2022 23:40:56 +0300 |
Signed-off-by: Vladimir Sementsov-Ogievskiy <v.sementsov-og@mail.ru>
---
block/export/export.c | 18 ++++++++++++++++++
include/sysemu/block-backend.h | 1 +
2 files changed, 19 insertions(+)
diff --git a/block/export/export.c b/block/export/export.c
index 6d3b9964c8..613b5bc1d5 100644
--- a/block/export/export.c
+++ b/block/export/export.c
@@ -362,3 +362,21 @@ 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);
+ return NULL;
+ }
+
+ return exp->blk;
+}
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 904d70f49c..250c7465a5 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -124,6 +124,7 @@ DeviceState *blk_get_attached_dev(BlockBackend *blk);
char *blk_get_attached_dev_id(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);
int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
--
2.35.1
- [PATCH v4 24/45] blockdev: transactions: rename some things, (continued)
- [PATCH v4 24/45] blockdev: transactions: rename some things, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 25/45] blockdev: qmp_transaction: refactor loop to classic for, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 26/45] blockdev: transaction: refactor handling transaction properties, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 27/45] blockdev: qmp_transaction: drop extra generic layer, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 29/45] block: introduce BDRV_O_NOPERM flag, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 28/45] qapi: block: add blockdev-del transaction action, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 31/45] qapi: block: add blockdev-add transaction action, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 30/45] block: bdrv_insert_node(): use BDRV_O_NOPERM, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 32/45] iotests: add blockdev-add-transaction, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 33/45] block-backend: blk_root(): drop const specifier on return type, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 34/45] block/export: add blk_by_export_id(),
Vladimir Sementsov-Ogievskiy <=
- [PATCH v4 36/45] block: bdrv_replace_child_bs(): move to external transaction, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 37/45] qapi: add x-blockdev-replace command, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 35/45] block: make bdrv_find_child() function public, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 38/45] qapi: add x-blockdev-replace transaction action, Vladimir Sementsov-Ogievskiy, 2022/03/29
- [PATCH v4 41/45] iotests.py: introduce VM.assert_edges_list() method, Vladimir Sementsov-Ogievskiy, 2022/03/30
- [PATCH v4 42/45] iotests.py: add VM.qmp_check() helper, Vladimir Sementsov-Ogievskiy, 2022/03/30
- [PATCH v4 39/45] block: bdrv_get_xdbg_block_graph(): report export ids, Vladimir Sementsov-Ogievskiy, 2022/03/30
- [PATCH v4 45/45] block/copy-before-write: correct permission scheme, Vladimir Sementsov-Ogievskiy, 2022/03/30
- [PATCH v4 43/45] iotests: add filter-insertion, Vladimir Sementsov-Ogievskiy, 2022/03/30
- [PATCH v4 44/45] block: bdrv_open_inherit: create BlockBackend only when necessary, Vladimir Sementsov-Ogievskiy, 2022/03/30