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block: drop BlockDriverState::read_only

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This variable is just a cache for !(bs->open_flags & BDRV_O_RDWR),
which we have to synchronize everywhere. Let's just drop it and
consistently use bdrv_is_read_only().

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210527154056.70294-3-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-05-27 18:40:55 +03:00 • committed by Kevin Wolf
parent 307261b243
commit 975da07374
3 changed files with 1 additions and 13 deletions
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1
include/block/block_int.h
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@ -843,7 +843,6 @@ struct BlockDriverState {
* locking needed during I/O...
*/
int open_flags; /* flags used to open the file, re-used for re-open */
bool read_only; /* if true, the media is read only */
bool encrypted; /* if true, the media is encrypted */
bool sg; /* if true, the device is a /dev/sg* */
bool probed; /* if true, format was probed rather than specified */