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[Qemu-devel] [PATCH 1/2] block: Relax bdrv_lookup_bs constraints.
From: |
Benoît Canet |
Subject: |
[Qemu-devel] [PATCH 1/2] block: Relax bdrv_lookup_bs constraints. |
Date: |
Wed, 12 Feb 2014 17:15:06 +0100 |
The following patch will reuse bdrv_lookup_bs in order to open images by
references so the rules of usage of bdrv_lookup_bs must be relaxed a bit.
Signed-off-by: Benoit Canet <address@hidden>
---
block.c | 26 +++++++++++---------------
1 file changed, 11 insertions(+), 15 deletions(-)
diff --git a/block.c b/block.c
index 3843f59..5ca901b 100644
--- a/block.c
+++ b/block.c
@@ -3579,30 +3579,26 @@ BlockDriverState *bdrv_lookup_bs(const char *device,
{
BlockDriverState *bs = NULL;
- if ((!device && !node_name) || (device && node_name)) {
- error_setg(errp, "Use either device or node-name but not both");
- return NULL;
- }
-
if (device) {
bs = bdrv_find(device);
- if (!bs) {
- error_set(errp, QERR_DEVICE_NOT_FOUND, device);
- return NULL;
+ if (bs) {
+ return bs;
}
-
- return bs;
}
- bs = bdrv_find_node(node_name);
+ if (node_name) {
+ bs = bdrv_find_node(node_name);
- if (!bs) {
- error_set(errp, QERR_DEVICE_NOT_FOUND, node_name);
- return NULL;
+ if (bs) {
+ return bs;
+ }
}
- return bs;
+ error_setg(errp, "Cannot find device=%s nor node_name=%s",
+ device ? device : "",
+ node_name ? node_name : "");
+ return NULL;
}
BlockDriverState *bdrv_next(BlockDriverState *bs)
--
1.8.3.2