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block: implement the bdrv_reopen_prepare helper for LUKS driver 

If the bdrv_reopen_prepare helper isn't provided, the qemu-img commit
command fails to re-open the base layer after committing changes into
it. Provide a no-op implementation for the LUKS driver, since there
is not any custom work that needs doing to re-open it.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Daniel P. Berrange 2018-01-18 10:31:43 +00:00 committed by Kevin Wolf
parent d9bbfea646
commit f87e08f9e2
1 changed files with 7 additions and 0 deletions
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7
block/crypto.c
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@ -384,6 +384,12 @@ static void block_crypto_close(BlockDriverState *bs)
qcrypto_block_free(crypto->block);
}
static int block_crypto_reopen_prepare(BDRVReopenState *state,
BlockReopenQueue *queue, Error **errp)
{
/* nothing needs checking */
return 0;
}
/*
* 1 MB bounce buffer gives good performance / memory tradeoff
@ -621,6 +627,7 @@ BlockDriver bdrv_crypto_luks = {
.bdrv_truncate = block_crypto_truncate,
.create_opts = &block_crypto_create_opts_luks,
.bdrv_reopen_prepare = block_crypto_reopen_prepare,
.bdrv_refresh_limits = block_crypto_refresh_limits,
.bdrv_co_preadv = block_crypto_co_preadv,
.bdrv_co_pwritev = block_crypto_co_pwritev,