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author | Maxim Levitsky <mlevitsk@redhat.com> | 2020-06-25 14:55:46 +0200 |
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committer | Max Reitz <mreitz@redhat.com> | 2020-07-06 08:49:28 +0200 |
commit | 30da9dd88a0315d73320e27dfb69093ee3ce5d1c (patch) | |
tree | 15c0188524deaefb1db17ffa59a57fcab1b4be44 | |
parent | ced914d0ab9fb2c900f873f6349a0b8eecd1fdbe (diff) | |
download | qemu-30da9dd88a0315d73320e27dfb69093ee3ce5d1c.zip qemu-30da9dd88a0315d73320e27dfb69093ee3ce5d1c.tar.gz qemu-30da9dd88a0315d73320e27dfb69093ee3ce5d1c.tar.bz2 |
block/crypto: implement blockdev-amend
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200608094030.670121-13-mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
-rw-r--r-- | block/crypto.c | 72 | ||||
-rw-r--r-- | qapi/block-core.json | 14 |
2 files changed, 66 insertions, 20 deletions
diff --git a/block/crypto.c b/block/crypto.c index b9c40e6..3fbd688 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -791,32 +791,21 @@ block_crypto_get_specific_info_luks(BlockDriverState *bs, Error **errp) } static int -block_crypto_amend_options_luks(BlockDriverState *bs, - QemuOpts *opts, - BlockDriverAmendStatusCB *status_cb, - void *cb_opaque, - bool force, - Error **errp) +block_crypto_amend_options_generic_luks(BlockDriverState *bs, + QCryptoBlockAmendOptions *amend_options, + bool force, + Error **errp) { BlockCrypto *crypto = bs->opaque; - QDict *cryptoopts = NULL; - QCryptoBlockAmendOptions *amend_options = NULL; int ret; assert(crypto); assert(crypto->block); - crypto->updating_keys = true; + /* apply for exclusive read/write permissions to the underlying file*/ + crypto->updating_keys = true; ret = bdrv_child_refresh_perms(bs, bs->file, errp); - if (ret < 0) { - goto cleanup; - } - - cryptoopts = qemu_opts_to_qdict(opts, NULL); - qdict_put_str(cryptoopts, "format", "luks"); - amend_options = block_crypto_amend_opts_init(cryptoopts, errp); - if (!amend_options) { - ret = -EINVAL; + if (ret) { goto cleanup; } @@ -828,13 +817,57 @@ block_crypto_amend_options_luks(BlockDriverState *bs, force, errp); cleanup: + /* release exclusive read/write permissions to the underlying file*/ crypto->updating_keys = false; bdrv_child_refresh_perms(bs, bs->file, errp); - qapi_free_QCryptoBlockAmendOptions(amend_options); + return ret; +} + +static int +block_crypto_amend_options_luks(BlockDriverState *bs, + QemuOpts *opts, + BlockDriverAmendStatusCB *status_cb, + void *cb_opaque, + bool force, + Error **errp) +{ + BlockCrypto *crypto = bs->opaque; + QDict *cryptoopts = NULL; + QCryptoBlockAmendOptions *amend_options = NULL; + int ret = -EINVAL; + + assert(crypto); + assert(crypto->block); + + cryptoopts = qemu_opts_to_qdict(opts, NULL); + qdict_put_str(cryptoopts, "format", "luks"); + amend_options = block_crypto_amend_opts_init(cryptoopts, errp); qobject_unref(cryptoopts); + if (!amend_options) { + goto cleanup; + } + ret = block_crypto_amend_options_generic_luks(bs, amend_options, + force, errp); +cleanup: + qapi_free_QCryptoBlockAmendOptions(amend_options); return ret; } +static int +coroutine_fn block_crypto_co_amend_luks(BlockDriverState *bs, + BlockdevAmendOptions *opts, + bool force, + Error **errp) +{ + QCryptoBlockAmendOptions amend_opts; + + amend_opts = (QCryptoBlockAmendOptions) { + .format = Q_CRYPTO_BLOCK_FORMAT_LUKS, + .u.luks = *qapi_BlockdevAmendOptionsLUKS_base(&opts->u.luks), + }; + return block_crypto_amend_options_generic_luks(bs, &amend_opts, + force, errp); +} static void block_crypto_child_perms(BlockDriverState *bs, BdrvChild *c, @@ -910,6 +943,7 @@ static BlockDriver bdrv_crypto_luks = { .bdrv_get_info = block_crypto_get_info_luks, .bdrv_get_specific_info = block_crypto_get_specific_info_luks, .bdrv_amend_options = block_crypto_amend_options_luks, + .bdrv_co_amend = block_crypto_co_amend_luks, .is_format = true, diff --git a/qapi/block-core.json b/qapi/block-core.json index c229962..cd679ad 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -4675,6 +4675,18 @@ 'options': 'BlockdevCreateOptions' } } ## +# @BlockdevAmendOptionsLUKS: +# +# Driver specific image amend options for LUKS. +# +# Since: 5.1 +## +{ 'struct': 'BlockdevAmendOptionsLUKS', + 'base': 'QCryptoBlockAmendOptionsLUKS', + 'data': { } +} + +## # @BlockdevAmendOptions: # # Options for amending an image format @@ -4688,7 +4700,7 @@ 'driver': 'BlockdevDriver' }, 'discriminator': 'driver', 'data': { - } } + 'luks': 'BlockdevAmendOptionsLUKS' } } ## # @x-blockdev-amend: |