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block: drop BlockBackendRootState::read_only

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Instead of keeping additional boolean field, let's store the
information in BDRV_O_RDWR bit of BlockBackendRootState::open_flags.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210527154056.70294-4-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-05-27 18:40:56 +03:00 committed by Kevin Wolf
parent 975da07374
commit 260242a833
3 changed files with 3 additions and 11 deletions
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10
block/block-backend.c
View file

@ -1852,7 +1852,7 @@ bool blk_supports_write_perm(BlockBackend *blk)
if (bs) {
return !bdrv_is_read_only(bs);
} else {
return !blk->root_state.read_only;
return blk->root_state.open_flags & BDRV_O_RDWR;
}
}
@ -2269,7 +2269,6 @@ void blk_update_root_state(BlockBackend *blk)
assert(blk->root);
blk->root_state.open_flags = blk->root->bs->open_flags;
blk->root_state.read_only = bdrv_is_read_only(blk->root->bs);
blk->root_state.detect_zeroes = blk->root->bs->detect_zeroes;
}
@ -2288,12 +2287,7 @@ bool blk_get_detect_zeroes_from_root_state(BlockBackend *blk)
*/
int blk_get_open_flags_from_root_state(BlockBackend *blk)
{
int bs_flags;
bs_flags = blk->root_state.read_only ? 0 : BDRV_O_RDWR;
bs_flags |= blk->root_state.open_flags & ~BDRV_O_RDWR;
return bs_flags;
return blk->root_state.open_flags;
}
BlockBackendRootState *blk_get_root_state(BlockBackend *blk)

3
blockdev.c
View file

@ -583,8 +583,7 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
blk_rs = blk_get_root_state(blk);
blk_rs->open_flags = bdrv_flags;
blk_rs->read_only = read_only;
blk_rs->open_flags = bdrv_flags | (read_only ? 0 : BDRV_O_RDWR);
blk_rs->detect_zeroes = detect_zeroes;
qobject_unref(bs_opts);

1
include/block/block_int.h
View file

@ -1007,7 +1007,6 @@ struct BlockDriverState {
struct BlockBackendRootState {
int open_flags;
bool read_only;
BlockdevDetectZeroesOptions detect_zeroes;
};