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| author | Alberto Garcia | 2019-03-12 17:48:48 +0100 |
|---|---|---|
| committer | Kevin Wolf | 2019-03-12 20:30:14 +0100 |
| commit | 8a2ce0bc1eb447c19c52422c03e690a420ea3ec7 (patch) | |
| tree | ea4398dbcc4f7211347e4b0100de2030a680c10b /include | |
| parent | block: Allow changing the backing file on reopen (diff) | |
| download | qemu-8a2ce0bc1eb447c19c52422c03e690a420ea3ec7.tar.gz qemu-8a2ce0bc1eb447c19c52422c03e690a420ea3ec7.tar.xz qemu-8a2ce0bc1eb447c19c52422c03e690a420ea3ec7.zip | |
block: Add a 'mutable_opts' field to BlockDriver
If we reopen a BlockDriverState and there is an option that is present
in bs->options but missing from the new set of options then we have to
return an error unless the driver is able to reset it to its default
value.
This patch adds a new 'mutable_opts' field to BlockDriver. This is
a list of runtime options that can be modified during reopen. If an
option in this list is unspecified on reopen then it must be reset (or
return an error).
Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block_int.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index 438feba4e5..01e855a066 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -383,6 +383,14 @@ struct BlockDriver { /* List of options for creating images, terminated by name == NULL */ QemuOptsList *create_opts; + /* + * If this driver supports reopening images this contains a + * NULL-terminated list of the runtime options that can be + * modified. If an option in this list is unspecified during + * reopen then it _must_ be reset to its default value or return + * an error. + */ + const char *const *mutable_opts; /* * Returns 0 for completed check, -errno for internal errors. |