From 90766d9db987a089ba271f6d30d6856745a7a3ce Mon Sep 17 00:00:00 2001 From: Maxim Levitsky Date: Thu, 25 Jun 2020 14:55:43 +0200 Subject: [PATCH] block/qcow2: extend qemu-img amend interface with crypto options MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Now that we have all the infrastructure in place, wire it in the qcow2 driver and expose this to the user. Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé Reviewed-by: Max Reitz Message-Id: <20200608094030.670121-9-mlevitsk@redhat.com> Signed-off-by: Max Reitz --- block/qcow2.c | 71 +++++++++++++++++++++++++++++++++----- tests/qemu-iotests/082.out | 45 ++++++++++++++++++++++++ 2 files changed, 107 insertions(+), 9 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index 389205dffd..750e9c4842 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -176,6 +176,19 @@ static ssize_t qcow2_crypto_hdr_write_func(QCryptoBlock *block, size_t offset, return ret; } +static QDict* +qcow2_extract_crypto_opts(QemuOpts *opts, const char *fmt, Error **errp) +{ + QDict *cryptoopts_qdict; + QDict *opts_qdict; + + /* Extract "encrypt." options into a qdict */ + opts_qdict = qemu_opts_to_qdict(opts, NULL); + qdict_extract_subqdict(opts_qdict, &cryptoopts_qdict, "encrypt."); + qobject_unref(opts_qdict); + qdict_put_str(cryptoopts_qdict, "format", fmt); + return cryptoopts_qdict; +} /* * read qcow2 extension and fill bs @@ -4860,16 +4873,9 @@ static BlockMeasureInfo *qcow2_measure(QemuOpts *opts, BlockDriverState *in_bs, if (has_luks) { g_autoptr(QCryptoBlockCreateOptions) create_opts = NULL; - QDict *opts_qdict; - QDict *cryptoopts; + QDict *cryptoopts = qcow2_extract_crypto_opts(opts, "luks", errp); size_t headerlen; - opts_qdict = qemu_opts_to_qdict(opts, NULL); - qdict_extract_subqdict(opts_qdict, &cryptoopts, "encrypt."); - qobject_unref(opts_qdict); - - qdict_put_str(cryptoopts, "format", "luks"); - create_opts = block_crypto_create_opts_init(cryptoopts, errp); qobject_unref(cryptoopts); if (!create_opts) { @@ -5273,6 +5279,7 @@ typedef enum Qcow2AmendOperation { QCOW2_NO_OPERATION = 0, QCOW2_UPGRADING, + QCOW2_UPDATING_ENCRYPTION, QCOW2_CHANGING_REFCOUNT_ORDER, QCOW2_DOWNGRADING, } Qcow2AmendOperation; @@ -5354,6 +5361,7 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts, int ret; QemuOptDesc *desc = opts->list->desc; Qcow2AmendHelperCBInfo helper_cb_info; + bool encryption_update = false; while (desc && desc->name) { if (!qemu_opt_find(opts, desc->name)) { @@ -5380,6 +5388,18 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts, backing_file = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); } else if (!strcmp(desc->name, BLOCK_OPT_BACKING_FMT)) { backing_format = qemu_opt_get(opts, BLOCK_OPT_BACKING_FMT); + } else if (g_str_has_prefix(desc->name, "encrypt.")) { + if (!s->crypto) { + error_setg(errp, + "Can't amend encryption options - encryption not present"); + return -EINVAL; + } + if (s->crypt_method_header != QCOW_CRYPT_LUKS) { + error_setg(errp, + "Only LUKS encryption options can be amended"); + return -ENOTSUP; + } + encryption_update = true; } else if (!strcmp(desc->name, BLOCK_OPT_LAZY_REFCOUNTS)) { lazy_refcounts = qemu_opt_get_bool(opts, BLOCK_OPT_LAZY_REFCOUNTS, lazy_refcounts); @@ -5422,7 +5442,8 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts, .original_status_cb = status_cb, .original_cb_opaque = cb_opaque, .total_operations = (new_version != old_version) - + (s->refcount_bits != refcount_bits) + + (s->refcount_bits != refcount_bits) + + (encryption_update == true) }; /* Upgrade first (some features may require compat=1.1) */ @@ -5435,6 +5456,33 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts, } } + if (encryption_update) { + QDict *amend_opts_dict; + QCryptoBlockAmendOptions *amend_opts; + + helper_cb_info.current_operation = QCOW2_UPDATING_ENCRYPTION; + amend_opts_dict = qcow2_extract_crypto_opts(opts, "luks", errp); + if (!amend_opts_dict) { + return -EINVAL; + } + amend_opts = block_crypto_amend_opts_init(amend_opts_dict, errp); + qobject_unref(amend_opts_dict); + if (!amend_opts) { + return -EINVAL; + } + ret = qcrypto_block_amend_options(s->crypto, + qcow2_crypto_hdr_read_func, + qcow2_crypto_hdr_write_func, + bs, + amend_opts, + force, + errp); + qapi_free_QCryptoBlockAmendOptions(amend_opts); + if (ret < 0) { + return ret; + } + } + if (s->refcount_bits != refcount_bits) { int refcount_order = ctz32(refcount_bits); @@ -5694,6 +5742,11 @@ static QemuOptsList qcow2_amend_opts = { .name = "qcow2-amend-opts", .head = QTAILQ_HEAD_INITIALIZER(qcow2_amend_opts.head), .desc = { + BLOCK_CRYPTO_OPT_DEF_LUKS_STATE("encrypt."), + BLOCK_CRYPTO_OPT_DEF_LUKS_KEYSLOT("encrypt."), + BLOCK_CRYPTO_OPT_DEF_LUKS_OLD_SECRET("encrypt."), + BLOCK_CRYPTO_OPT_DEF_LUKS_NEW_SECRET("encrypt."), + BLOCK_CRYPTO_OPT_DEF_LUKS_ITER_TIME("encrypt."), QCOW_COMMON_OPTIONS, { /* end of list */ } } diff --git a/tests/qemu-iotests/082.out b/tests/qemu-iotests/082.out index b1cf5dfe43..a4a2b69030 100644 --- a/tests/qemu-iotests/082.out +++ b/tests/qemu-iotests/082.out @@ -645,6 +645,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size @@ -656,6 +661,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size @@ -667,6 +677,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size @@ -678,6 +693,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size @@ -689,6 +709,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size @@ -700,6 +725,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size @@ -711,6 +741,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size @@ -722,6 +757,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size @@ -750,6 +790,11 @@ Amend options for 'qcow2': compat= - Compatibility level (v2 [0.10] or v3 [1.1]) data_file= - File name of an external data file data_file_raw= - The external data file must stay valid as a raw image + encrypt.iter-time= - Time to spend in PBKDF in milliseconds + encrypt.keyslot= - Select a single keyslot to modify explicitly + encrypt.new-secret= - New secret to set in the matching keyslots. Empty string to erase + encrypt.old-secret= - Select all keyslots that match this password + encrypt.state= - Select new state of affected keyslots (active/inactive) lazy_refcounts= - Postpone refcount updates refcount_bits= - Width of a reference count entry in bits size= - Virtual disk size