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[Qemu-devel] [PATCH 4/7] block: Add options QDict to bdrv_open_common()
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 4/7] block: Add options QDict to bdrv_open_common() |
Date: |
Fri, 1 Mar 2013 21:13:38 +0100 |
The options are passed down to the block drivers, which are supposed to
remove all options they have processed. Anything that is left over in
the end is an unknown option and results in an error.
Signed-off-by: Kevin Wolf <address@hidden>
---
block.c | 32 ++++++++++++++++++++++++++------
1 file changed, 26 insertions(+), 6 deletions(-)
diff --git a/block.c b/block.c
index bf93dd1..e0e3b99 100644
--- a/block.c
+++ b/block.c
@@ -665,15 +665,18 @@ static int bdrv_open_flags(BlockDriverState *bs, int
flags)
/*
* Common part for opening disk images and files
+ *
+ * Removes all processed options from *options.
*/
static int bdrv_open_common(BlockDriverState *bs, BlockDriverState *file,
- const char *filename,
+ const char *filename, QDict *options,
int flags, BlockDriver *drv)
{
int ret, open_flags;
assert(drv != NULL);
assert(bs->file == NULL);
+ assert(options == NULL || bs->options != options);
trace_bdrv_open_common(bs, filename, flags, drv->format_name);
@@ -710,7 +713,7 @@ static int bdrv_open_common(BlockDriverState *bs,
BlockDriverState *file,
} else {
assert(file != NULL);
bs->file = file;
- ret = drv->bdrv_open(bs, NULL, open_flags);
+ ret = drv->bdrv_open(bs, options, open_flags);
}
if (ret < 0) {
@@ -752,7 +755,7 @@ int bdrv_file_open(BlockDriverState **pbs, const char
*filename, int flags)
}
bs = bdrv_new("");
- ret = bdrv_open_common(bs, NULL, filename, flags, drv);
+ ret = bdrv_open_common(bs, NULL, filename, NULL, flags, drv);
if (ret < 0) {
bdrv_delete(bs);
return ret;
@@ -821,6 +824,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename,
QDict *options,
}
bs->options = options;
+ options = qdict_clone_shallow(options);
/* For snapshot=on, create a temporary qcow2 overlay */
if (flags & BDRV_O_SNAPSHOT) {
@@ -903,7 +907,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename,
QDict *options,
}
/* Open the image */
- ret = bdrv_open_common(bs, file, filename, flags, drv);
+ ret = bdrv_open_common(bs, file, filename, options, flags, drv);
if (ret < 0) {
goto unlink_and_fail;
}
@@ -917,11 +921,22 @@ int bdrv_open(BlockDriverState *bs, const char *filename,
QDict *options,
if ((flags & BDRV_O_NO_BACKING) == 0) {
ret = bdrv_open_backing_file(bs);
if (ret < 0) {
- bdrv_close(bs);
- return ret;
+ goto close_and_fail;
}
}
+ /* Check if any unknown options were used */
+ if (qdict_size(options) != 0) {
+ const QDictEntry *entry = qdict_first(options);
+ qerror_report(ERROR_CLASS_GENERIC_ERROR, "Block format '%s' used by "
+ "device '%s' doesn't support the option '%s'",
+ drv->format_name, bs->device_name, entry->key);
+
+ ret = -EINVAL;
+ goto close_and_fail;
+ }
+ QDECREF(options);
+
if (!bdrv_key_required(bs)) {
bdrv_dev_change_media_cb(bs, true);
}
@@ -942,8 +957,13 @@ unlink_and_fail:
}
fail:
QDECREF(bs->options);
+ QDECREF(options);
bs->options = NULL;
+ return ret;
+close_and_fail:
+ bdrv_close(bs);
+ QDECREF(options);
return ret;
}
--
1.8.1.2
- [Qemu-devel] [PATCH 0/7] block: Add driver specific options, Kevin Wolf, 2013/03/01
- [Qemu-devel] [PATCH 1/7] block: Add options QDict to .bdrv_open(), Kevin Wolf, 2013/03/01
- [Qemu-devel] [PATCH 2/7] block: Add options QDict to bdrv_open() prototype, Kevin Wolf, 2013/03/01
- [Qemu-devel] [PATCH 3/7] Add qdict_clone_shallow(), Kevin Wolf, 2013/03/01
- [Qemu-devel] [PATCH 4/7] block: Add options QDict to bdrv_open_common(),
Kevin Wolf <=
- [Qemu-devel] [PATCH 5/7] qemu-option: Add qemu_opts_absorb_qdict(), Kevin Wolf, 2013/03/01
- [Qemu-devel] [PATCH 6/7] block: Support driver specific options in drive_init(), Kevin Wolf, 2013/03/01
- [Qemu-devel] [PATCH 7/7] qcow2: Allow lazy refcounts to be enabled on the command line, Kevin Wolf, 2013/03/01
- Re: [Qemu-devel] [PATCH 0/7] block: Add driver specific options, Stefan Hajnoczi, 2013/03/04