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| author | Kevin Wolf <kwolf@redhat.com> | 2017-11-07 18:21:41 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-11-17 13:35:59 +0100 |
| commit | 398e6ad014df261d20d3fd6cff2cfbf940bac714 (patch) | |
| tree | 32ab30963ddfd86a2e4bb9199c393c6a466e00f3 /qapi | |
| parent | f66afbe26f0c093d639610d70d16d7cc3183b652 (diff) | |
| download | qemu-398e6ad014df261d20d3fd6cff2cfbf940bac714.zip qemu-398e6ad014df261d20d3fd6cff2cfbf940bac714.tar.gz qemu-398e6ad014df261d20d3fd6cff2cfbf940bac714.tar.bz2 | |
block: Deprecate bdrv_set_read_only() and users
bdrv_set_read_only() is used by some block drivers to override the
read-only option given by the user. This is not how read-only images
generally work in QEMU: Instead of second guessing what the user really
meant (which currently includes making an image read-only even if the
user didn't only use the default, but explicitly said read-only=off), we
should error out if we can't provide what the user requested.
This adds deprecation warnings to all callers of bdrv_set_read_only() so
that the behaviour can be corrected after the usual deprecation period.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/block-core.json | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index ab96e34..76bf50f 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3134,8 +3134,11 @@ # This option is required on the top level of blockdev-add. # @discard: discard-related options (default: ignore) # @cache: cache-related options -# @read-only: whether the block device should be read-only -# (default: false) +# @read-only: whether the block device should be read-only (default: false). +# Note that some block drivers support only read-only access, +# either generally or in certain configurations. In this case, +# the default value does not work and the option must be +# specified explicitly. # @detect-zeroes: detect and optimize zero writes (Since 2.1) # (default: off) # @force-share: force share all permission on added nodes. |