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[Qemu-devel] [PATCH v2 3/4] block: Catch duplicate IDs in bdrv_new()
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH v2 3/4] block: Catch duplicate IDs in bdrv_new() |
Date: |
Thu, 17 Apr 2014 17:48:34 +0200 |
Since commit f298d071, block devices added with blockdev-add don't have
a QemuOpts around in dinfo->opts. Consequently, we can't rely any more
on QemuOpts catching duplicate IDs for block devices.
This patch add a new check for duplicate IDs to bdrv_new(), and moves the
existing check that the ID isn't already taken for a node-name there as
well.
Signed-off-by: Kevin Wolf <address@hidden>
---
block.c | 11 +++++++++++
blockdev.c | 6 ------
tests/qemu-iotests/087 | 33 +++++++++++++++++++++++++++++++++
tests/qemu-iotests/087.out | 13 +++++++++++++
4 files changed, 57 insertions(+), 6 deletions(-)
diff --git a/block.c b/block.c
index f3b93c9..fc2edd3 100644
--- a/block.c
+++ b/block.c
@@ -336,6 +336,17 @@ BlockDriverState *bdrv_new(const char *device_name, Error
**errp)
{
BlockDriverState *bs;
+ if (bdrv_find(device_name)) {
+ error_setg(errp, "Device with id '%s' already exists",
+ device_name);
+ return NULL;
+ }
+ if (bdrv_find_node(device_name)) {
+ error_setg(errp, "Device with node-name '%s' already exists",
+ device_name);
+ return NULL;
+ }
+
bs = g_malloc0(sizeof(BlockDriverState));
QLIST_INIT(&bs->dirty_bitmaps);
pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
diff --git a/blockdev.c b/blockdev.c
index 3a11a62..09826f1 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -452,12 +452,6 @@ static DriveInfo *blockdev_init(const char *file, QDict
*bs_opts,
}
}
- if (bdrv_find_node(qemu_opts_id(opts))) {
- error_setg(errp, "device id=%s is conflicting with a node-name",
- qemu_opts_id(opts));
- goto early_err;
- }
-
/* init */
dinfo = g_malloc0(sizeof(*dinfo));
dinfo->id = g_strdup(qemu_opts_id(opts));
diff --git a/tests/qemu-iotests/087 b/tests/qemu-iotests/087
index a38bb70..37d82fc 100755
--- a/tests/qemu-iotests/087
+++ b/tests/qemu-iotests/087
@@ -73,6 +73,39 @@ run_qemu <<EOF
EOF
echo
+echo === Duplicate ID ===
+echo
+
+run_qemu <<EOF
+{ "execute": "qmp_capabilities" }
+{ "execute": "blockdev-add",
+ "arguments": {
+ "options": {
+ "driver": "$IMGFMT",
+ "id": "disk",
+ "file": {
+ "driver": "file",
+ "filename": "$TEST_IMG"
+ }
+ }
+ }
+ }
+{ "execute": "blockdev-add",
+ "arguments": {
+ "options": {
+ "driver": "$IMGFMT",
+ "id": "disk",
+ "file": {
+ "driver": "file",
+ "filename": "$TEST_IMG"
+ }
+ }
+ }
+ }
+{ "execute": "quit" }
+EOF
+
+echo
echo === aio=native without O_DIRECT ===
echo
diff --git a/tests/qemu-iotests/087.out b/tests/qemu-iotests/087.out
index e65dcdf..479bf86 100644
--- a/tests/qemu-iotests/087.out
+++ b/tests/qemu-iotests/087.out
@@ -13,6 +13,19 @@ QMP_VERSION
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event":
"DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
+=== Duplicate ID ===
+
+Testing:
+QMP_VERSION
+{"return": {}}
+{"return": {}}
+{"error": {"class": "GenericError", "desc": "Device with id 'disk' already
exists"}}
+{"return": {}}
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event":
"SHUTDOWN"}
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event":
"DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event":
"DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
+
+
=== aio=native without O_DIRECT ===
Testing:
--
1.8.3.1