From patchwork Thu Sep 16 17:22:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 513376 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87A90C28CEC for ; Thu, 16 Sep 2021 17:44:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 64C0260F6D for ; Thu, 16 Sep 2021 17:44:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345585AbhIPRpZ (ORCPT ); Thu, 16 Sep 2021 13:45:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:57136 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355849AbhIPRmL (ORCPT ); Thu, 16 Sep 2021 13:42:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B80CE60F8F; Thu, 16 Sep 2021 17:24:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631813092; bh=UUte5uFw47t4ywpcyFb80foKhlehULBJnQUlJFVu73U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mb2AirZ6cDB4D1LbSAJTZCP4ofn2gAoePf7+B6BdKIqQmGRZoGHbK6ZHGhPFHOUj7 y+uLg0pGhM5G2pOrN5mpWLYh61k/w1rPRUXO5jwebZo5cGtSUwEJswRvEt0iq8F5W5 jLdrVoV5ySiggYKo7qNIERj83zT+PjYEzq/VBrAk7UkL+jKjzDUBd7gsz7+TvehVOY FArl5aVPnQDVNWo5oA4QpSGjQ4QIBO3VqhBtT9aaKzkzW7Z5hG7kOcU8MIWkQqR79J kckkSzDfRF98UbMtFVgcVbrE3+gljBcQklOsLltFOyVX32k7/JOpmlYsjThf0cbLyI wKI1fXxTWZQ4g== From: Eric Biggers To: linux-block@vger.kernel.org Cc: linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, dm-devel@redhat.com, Satya Tangirala , Christoph Hellwig Subject: [PATCH v2 1/4] blk-crypto-fallback: properly prefix function and struct names Date: Thu, 16 Sep 2021 10:22:46 -0700 Message-Id: <20210916172249.45813-2-ebiggers@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210916172249.45813-1-ebiggers@kernel.org> References: <20210916172249.45813-1-ebiggers@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Eric Biggers For clarity, avoid using just the "blk_crypto_" prefix for functions and structs that are specific to blk-crypto-fallback. Instead, use "blk_crypto_fallback_". Some places already did this, but others didn't. This is also a prerequisite for using "struct blk_crypto_keyslot" to mean a generic blk-crypto keyslot (which is what it sounds like). Rename the fallback one to "struct blk_crypto_fallback_keyslot". Reviewed-by: Christoph Hellwig Signed-off-by: Eric Biggers --- block/blk-crypto-fallback.c | 59 +++++++++++++++++++------------------ 1 file changed, 30 insertions(+), 29 deletions(-) diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c index c322176a1e099..82b302597b474 100644 --- a/block/blk-crypto-fallback.c +++ b/block/blk-crypto-fallback.c @@ -72,7 +72,7 @@ static mempool_t *bio_fallback_crypt_ctx_pool; static DEFINE_MUTEX(tfms_init_lock); static bool tfms_inited[BLK_ENCRYPTION_MODE_MAX]; -static struct blk_crypto_keyslot { +static struct blk_crypto_fallback_keyslot { enum blk_crypto_mode_num crypto_mode; struct crypto_skcipher *tfms[BLK_ENCRYPTION_MODE_MAX]; } *blk_crypto_keyslots; @@ -88,9 +88,9 @@ static struct bio_set crypto_bio_split; */ static u8 blank_key[BLK_CRYPTO_MAX_KEY_SIZE]; -static void blk_crypto_evict_keyslot(unsigned int slot) +static void blk_crypto_fallback_evict_keyslot(unsigned int slot) { - struct blk_crypto_keyslot *slotp = &blk_crypto_keyslots[slot]; + struct blk_crypto_fallback_keyslot *slotp = &blk_crypto_keyslots[slot]; enum blk_crypto_mode_num crypto_mode = slotp->crypto_mode; int err; @@ -103,34 +103,34 @@ static void blk_crypto_evict_keyslot(unsigned int slot) slotp->crypto_mode = BLK_ENCRYPTION_MODE_INVALID; } -static int blk_crypto_keyslot_program(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key, - unsigned int slot) +static int blk_crypto_fallback_keyslot_program(struct blk_keyslot_manager *ksm, + const struct blk_crypto_key *key, + unsigned int slot) { - struct blk_crypto_keyslot *slotp = &blk_crypto_keyslots[slot]; + struct blk_crypto_fallback_keyslot *slotp = &blk_crypto_keyslots[slot]; const enum blk_crypto_mode_num crypto_mode = key->crypto_cfg.crypto_mode; int err; if (crypto_mode != slotp->crypto_mode && slotp->crypto_mode != BLK_ENCRYPTION_MODE_INVALID) - blk_crypto_evict_keyslot(slot); + blk_crypto_fallback_evict_keyslot(slot); slotp->crypto_mode = crypto_mode; err = crypto_skcipher_setkey(slotp->tfms[crypto_mode], key->raw, key->size); if (err) { - blk_crypto_evict_keyslot(slot); + blk_crypto_fallback_evict_keyslot(slot); return err; } return 0; } -static int blk_crypto_keyslot_evict(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key, - unsigned int slot) +static int blk_crypto_fallback_keyslot_evict(struct blk_keyslot_manager *ksm, + const struct blk_crypto_key *key, + unsigned int slot) { - blk_crypto_evict_keyslot(slot); + blk_crypto_fallback_evict_keyslot(slot); return 0; } @@ -140,8 +140,8 @@ static int blk_crypto_keyslot_evict(struct blk_keyslot_manager *ksm, * hardware. */ static const struct blk_ksm_ll_ops blk_crypto_ksm_ll_ops = { - .keyslot_program = blk_crypto_keyslot_program, - .keyslot_evict = blk_crypto_keyslot_evict, + .keyslot_program = blk_crypto_fallback_keyslot_program, + .keyslot_evict = blk_crypto_fallback_keyslot_evict, }; static void blk_crypto_fallback_encrypt_endio(struct bio *enc_bio) @@ -159,7 +159,7 @@ static void blk_crypto_fallback_encrypt_endio(struct bio *enc_bio) bio_endio(src_bio); } -static struct bio *blk_crypto_clone_bio(struct bio *bio_src) +static struct bio *blk_crypto_fallback_clone_bio(struct bio *bio_src) { struct bvec_iter iter; struct bio_vec bv; @@ -186,12 +186,13 @@ static struct bio *blk_crypto_clone_bio(struct bio *bio_src) return bio; } -static bool blk_crypto_alloc_cipher_req(struct blk_ksm_keyslot *slot, - struct skcipher_request **ciph_req_ret, - struct crypto_wait *wait) +static bool +blk_crypto_fallback_alloc_cipher_req(struct blk_ksm_keyslot *slot, + struct skcipher_request **ciph_req_ret, + struct crypto_wait *wait) { struct skcipher_request *ciph_req; - const struct blk_crypto_keyslot *slotp; + const struct blk_crypto_fallback_keyslot *slotp; int keyslot_idx = blk_ksm_get_slot_idx(slot); slotp = &blk_crypto_keyslots[keyslot_idx]; @@ -209,7 +210,7 @@ static bool blk_crypto_alloc_cipher_req(struct blk_ksm_keyslot *slot, return true; } -static bool blk_crypto_split_bio_if_needed(struct bio **bio_ptr) +static bool blk_crypto_fallback_split_bio_if_needed(struct bio **bio_ptr) { struct bio *bio = *bio_ptr; unsigned int i = 0; @@ -276,7 +277,7 @@ static bool blk_crypto_fallback_encrypt_bio(struct bio **bio_ptr) blk_status_t blk_st; /* Split the bio if it's too big for single page bvec */ - if (!blk_crypto_split_bio_if_needed(bio_ptr)) + if (!blk_crypto_fallback_split_bio_if_needed(bio_ptr)) return false; src_bio = *bio_ptr; @@ -284,7 +285,7 @@ static bool blk_crypto_fallback_encrypt_bio(struct bio **bio_ptr) data_unit_size = bc->bc_key->crypto_cfg.data_unit_size; /* Allocate bounce bio for encryption */ - enc_bio = blk_crypto_clone_bio(src_bio); + enc_bio = blk_crypto_fallback_clone_bio(src_bio); if (!enc_bio) { src_bio->bi_status = BLK_STS_RESOURCE; return false; @@ -301,7 +302,7 @@ static bool blk_crypto_fallback_encrypt_bio(struct bio **bio_ptr) } /* and then allocate an skcipher_request for it */ - if (!blk_crypto_alloc_cipher_req(slot, &ciph_req, &wait)) { + if (!blk_crypto_fallback_alloc_cipher_req(slot, &ciph_req, &wait)) { src_bio->bi_status = BLK_STS_RESOURCE; goto out_release_keyslot; } @@ -403,7 +404,7 @@ static void blk_crypto_fallback_decrypt_bio(struct work_struct *work) } /* and then allocate an skcipher_request for it */ - if (!blk_crypto_alloc_cipher_req(slot, &ciph_req, &wait)) { + if (!blk_crypto_fallback_alloc_cipher_req(slot, &ciph_req, &wait)) { bio->bi_status = BLK_STS_RESOURCE; goto out; } @@ -473,9 +474,9 @@ static void blk_crypto_fallback_decrypt_endio(struct bio *bio) * @bio_ptr: pointer to the bio to prepare * * If bio is doing a WRITE operation, this splits the bio into two parts if it's - * too big (see blk_crypto_split_bio_if_needed). It then allocates a bounce bio - * for the first part, encrypts it, and update bio_ptr to point to the bounce - * bio. + * too big (see blk_crypto_fallback_split_bio_if_needed()). It then allocates a + * bounce bio for the first part, encrypts it, and updates bio_ptr to point to + * the bounce bio. * * For a READ operation, we mark the bio for decryption by using bi_private and * bi_end_io. @@ -610,7 +611,7 @@ static int blk_crypto_fallback_init(void) int blk_crypto_fallback_start_using_mode(enum blk_crypto_mode_num mode_num) { const char *cipher_str = blk_crypto_modes[mode_num].cipher_str; - struct blk_crypto_keyslot *slotp; + struct blk_crypto_fallback_keyslot *slotp; unsigned int i; int err = 0; From patchwork Thu Sep 16 17:22:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 513375 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4283C28CEF for ; Thu, 16 Sep 2021 17:44:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D4D060724 for ; Thu, 16 Sep 2021 17:44:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345608AbhIPRp0 (ORCPT ); Thu, 16 Sep 2021 13:45:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:57148 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355865AbhIPRmM (ORCPT ); Thu, 16 Sep 2021 13:42:12 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 471FE61164; Thu, 16 Sep 2021 17:24:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631813093; bh=8TZuiPhRVs5ydniKDMPA4kOxerIkjqETomdFYvCdU+0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hn2AzObvplPNqewvdr04Cjz4QAzl+HGFO4JBS8zeatntIFFYrxozxj9VIyitH8QRX 8EWfWY4ZivK8oZbeuc6xo1MGdG7zPR+VXpB7T4Niz9vLB3J1m13yBU0Dhdaen9uZiv NzANVCEt/KviOenOijxWH6k35lthbkxrpz/2tfEEeg2cKqhkoh0m9qu12WJIj6WPwn seJBrIdBthRCbyHt9b2ky2JHoM9dzlHuYaqvskbdTlJ4FVgqJMfdRvS3Zx9No/HHGc K4RJ8DMqwxQfVOE3iyNRp6sSnAQLSfytviDALRrRCcF7cGQ9Xb3nDjTZscB5Az6P9k mbOP/p0siucYA== From: Eric Biggers To: linux-block@vger.kernel.org Cc: linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, dm-devel@redhat.com, Satya Tangirala , Ulf Hansson Subject: [PATCH v2 3/4] blk-crypto: rename blk_keyslot_manager to blk_crypto_profile Date: Thu, 16 Sep 2021 10:22:48 -0700 Message-Id: <20210916172249.45813-4-ebiggers@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210916172249.45813-1-ebiggers@kernel.org> References: <20210916172249.45813-1-ebiggers@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Eric Biggers blk_keyslot_manager is misnamed because it doesn't necessarily manage keyslots. It actually does several different things: - Contains the crypto capabilities of the device. - Provides functions to control the inline encryption hardware. Originally these were just for programming/evicting keyslots; however, new functionality (hardware-wrapped keys) will require new functions here which are unrelated to keyslots. Moreover, device-mapper devices already (ab)use "keyslot_evict" to pass key eviction requests to their underlying devices even though device-mapper devices don't have any keyslots themselves (so it really should be "evict_key", not "keyslot_evict"). - Sometimes (but not always!) it manages keyslots. Originally it always did, but device-mapper devices don't have keyslots themselves, so they use a "passthrough keyslot manager" which doesn't actually manage keyslots. This hack works, but the terminology is unnatural. Also, some hardware doesn't have keyslots and thus also uses a "passthrough keyslot manager" (support for such hardware is yet to be upstreamed, but it will happen eventually). Let's stop having keyslot managers which don't actually manage keyslots. Instead, rename blk_keyslot_manager to blk_crypto_profile. This is a fairly big change, since for consistency it also has to update keyslot manager-related function names, variable names, and comments -- not just the actual struct name. However it's still a fairly straightforward change, as it doesn't change any actual functionality. Acked-by: Ulf Hansson # For MMC Signed-off-by: Eric Biggers --- block/blk-crypto-fallback.c | 71 ++-- block/blk-crypto-profile.c | 518 ++++++++++++++--------------- block/blk-crypto.c | 27 +- block/blk-integrity.c | 4 +- drivers/md/dm-core.h | 2 +- drivers/md/dm-table.c | 168 +++++----- drivers/md/dm.c | 8 +- drivers/mmc/core/crypto.c | 11 +- drivers/mmc/host/cqhci-crypto.c | 31 +- drivers/scsi/ufs/ufshcd-crypto.c | 32 +- drivers/scsi/ufs/ufshcd-crypto.h | 9 +- drivers/scsi/ufs/ufshcd.c | 2 +- drivers/scsi/ufs/ufshcd.h | 4 +- include/linux/blk-crypto-profile.h | 164 +++++---- include/linux/blkdev.h | 18 +- include/linux/device-mapper.h | 4 +- include/linux/mmc/host.h | 2 +- 17 files changed, 554 insertions(+), 521 deletions(-) diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c index b3920e8efd075..241d262ccaffe 100644 --- a/block/blk-crypto-fallback.c +++ b/block/blk-crypto-fallback.c @@ -77,7 +77,7 @@ static struct blk_crypto_fallback_keyslot { struct crypto_skcipher *tfms[BLK_ENCRYPTION_MODE_MAX]; } *blk_crypto_keyslots; -static struct blk_keyslot_manager blk_crypto_ksm; +static struct blk_crypto_profile blk_crypto_fallback_profile; static struct workqueue_struct *blk_crypto_wq; static mempool_t *blk_crypto_bounce_page_pool; static struct bio_set crypto_bio_split; @@ -103,9 +103,10 @@ static void blk_crypto_fallback_evict_keyslot(unsigned int slot) slotp->crypto_mode = BLK_ENCRYPTION_MODE_INVALID; } -static int blk_crypto_fallback_keyslot_program(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key, - unsigned int slot) +static int +blk_crypto_fallback_keyslot_program(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key, + unsigned int slot) { struct blk_crypto_fallback_keyslot *slotp = &blk_crypto_keyslots[slot]; const enum blk_crypto_mode_num crypto_mode = @@ -126,7 +127,7 @@ static int blk_crypto_fallback_keyslot_program(struct blk_keyslot_manager *ksm, return 0; } -static int blk_crypto_fallback_keyslot_evict(struct blk_keyslot_manager *ksm, +static int blk_crypto_fallback_keyslot_evict(struct blk_crypto_profile *profile, const struct blk_crypto_key *key, unsigned int slot) { @@ -134,14 +135,9 @@ static int blk_crypto_fallback_keyslot_evict(struct blk_keyslot_manager *ksm, return 0; } -/* - * The crypto API fallback KSM ops - only used for a bio when it specifies a - * blk_crypto_key that was not supported by the device's inline encryption - * hardware. - */ -static const struct blk_ksm_ll_ops blk_crypto_ksm_ll_ops = { - .keyslot_program = blk_crypto_fallback_keyslot_program, - .keyslot_evict = blk_crypto_fallback_keyslot_evict, +static const struct blk_crypto_ll_ops blk_crypto_fallback_ll_ops = { + .keyslot_program = blk_crypto_fallback_keyslot_program, + .keyslot_evict = blk_crypto_fallback_keyslot_evict, }; static void blk_crypto_fallback_encrypt_endio(struct bio *enc_bio) @@ -187,13 +183,13 @@ static struct bio *blk_crypto_fallback_clone_bio(struct bio *bio_src) } static bool -blk_crypto_fallback_alloc_cipher_req(struct blk_ksm_keyslot *slot, +blk_crypto_fallback_alloc_cipher_req(struct blk_crypto_keyslot *slot, struct skcipher_request **ciph_req_ret, struct crypto_wait *wait) { struct skcipher_request *ciph_req; const struct blk_crypto_fallback_keyslot *slotp; - int keyslot_idx = blk_ksm_get_slot_idx(slot); + int keyslot_idx = blk_crypto_keyslot_index(slot); slotp = &blk_crypto_keyslots[keyslot_idx]; ciph_req = skcipher_request_alloc(slotp->tfms[slotp->crypto_mode], @@ -265,7 +261,7 @@ static bool blk_crypto_fallback_encrypt_bio(struct bio **bio_ptr) { struct bio *src_bio, *enc_bio; struct bio_crypt_ctx *bc; - struct blk_ksm_keyslot *slot; + struct blk_crypto_keyslot *slot; int data_unit_size; struct skcipher_request *ciph_req = NULL; DECLARE_CRYPTO_WAIT(wait); @@ -292,10 +288,11 @@ static bool blk_crypto_fallback_encrypt_bio(struct bio **bio_ptr) } /* - * Use the crypto API fallback keyslot manager to get a crypto_skcipher - * for the algorithm and key specified for this bio. + * Get a blk-crypto-fallback keyslot that contains a crypto_skcipher for + * this bio's algorithm and key. */ - blk_st = blk_ksm_get_slot_for_key(&blk_crypto_ksm, bc->bc_key, &slot); + blk_st = blk_crypto_get_keyslot(&blk_crypto_fallback_profile, + bc->bc_key, &slot); if (blk_st != BLK_STS_OK) { src_bio->bi_status = blk_st; goto out_put_enc_bio; @@ -363,7 +360,7 @@ static bool blk_crypto_fallback_encrypt_bio(struct bio **bio_ptr) out_free_ciph_req: skcipher_request_free(ciph_req); out_release_keyslot: - blk_ksm_put_slot(slot); + blk_crypto_put_keyslot(slot); out_put_enc_bio: if (enc_bio) bio_put(enc_bio); @@ -381,7 +378,7 @@ static void blk_crypto_fallback_decrypt_bio(struct work_struct *work) container_of(work, struct bio_fallback_crypt_ctx, work); struct bio *bio = f_ctx->bio; struct bio_crypt_ctx *bc = &f_ctx->crypt_ctx; - struct blk_ksm_keyslot *slot; + struct blk_crypto_keyslot *slot; struct skcipher_request *ciph_req = NULL; DECLARE_CRYPTO_WAIT(wait); u64 curr_dun[BLK_CRYPTO_DUN_ARRAY_SIZE]; @@ -394,10 +391,11 @@ static void blk_crypto_fallback_decrypt_bio(struct work_struct *work) blk_status_t blk_st; /* - * Use the crypto API fallback keyslot manager to get a crypto_skcipher - * for the algorithm and key specified for this bio. + * Get a blk-crypto-fallback keyslot that contains a crypto_skcipher for + * this bio's algorithm and key. */ - blk_st = blk_ksm_get_slot_for_key(&blk_crypto_ksm, bc->bc_key, &slot); + blk_st = blk_crypto_get_keyslot(&blk_crypto_fallback_profile, + bc->bc_key, &slot); if (blk_st != BLK_STS_OK) { bio->bi_status = blk_st; goto out_no_keyslot; @@ -435,7 +433,7 @@ static void blk_crypto_fallback_decrypt_bio(struct work_struct *work) out: skcipher_request_free(ciph_req); - blk_ksm_put_slot(slot); + blk_crypto_put_keyslot(slot); out_no_keyslot: mempool_free(f_ctx, bio_fallback_crypt_ctx_pool); bio_endio(bio); @@ -500,8 +498,8 @@ bool blk_crypto_fallback_bio_prep(struct bio **bio_ptr) return false; } - if (!blk_ksm_crypto_cfg_supported(&blk_crypto_ksm, - &bc->bc_key->crypto_cfg)) { + if (!__blk_crypto_cfg_supported(&blk_crypto_fallback_profile, + &bc->bc_key->crypto_cfg)) { bio->bi_status = BLK_STS_NOTSUPP; return false; } @@ -527,7 +525,7 @@ bool blk_crypto_fallback_bio_prep(struct bio **bio_ptr) int blk_crypto_fallback_evict_key(const struct blk_crypto_key *key) { - return blk_ksm_evict_key(&blk_crypto_ksm, key); + return __blk_crypto_evict_key(&blk_crypto_fallback_profile, key); } static bool blk_crypto_fallback_inited; @@ -535,6 +533,7 @@ static int blk_crypto_fallback_init(void) { int i; int err; + struct blk_crypto_profile *profile = &blk_crypto_fallback_profile; if (blk_crypto_fallback_inited) return 0; @@ -545,24 +544,24 @@ static int blk_crypto_fallback_init(void) if (err) goto out; - err = blk_ksm_init(&blk_crypto_ksm, blk_crypto_num_keyslots); + err = blk_crypto_profile_init(profile, blk_crypto_num_keyslots); if (err) goto fail_free_bioset; err = -ENOMEM; - blk_crypto_ksm.ksm_ll_ops = blk_crypto_ksm_ll_ops; - blk_crypto_ksm.max_dun_bytes_supported = BLK_CRYPTO_MAX_IV_SIZE; + profile->ll_ops = blk_crypto_fallback_ll_ops; + profile->max_dun_bytes_supported = BLK_CRYPTO_MAX_IV_SIZE; /* All blk-crypto modes have a crypto API fallback. */ for (i = 0; i < BLK_ENCRYPTION_MODE_MAX; i++) - blk_crypto_ksm.crypto_modes_supported[i] = 0xFFFFFFFF; - blk_crypto_ksm.crypto_modes_supported[BLK_ENCRYPTION_MODE_INVALID] = 0; + profile->modes_supported[i] = 0xFFFFFFFF; + profile->modes_supported[BLK_ENCRYPTION_MODE_INVALID] = 0; blk_crypto_wq = alloc_workqueue("blk_crypto_wq", WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM, num_online_cpus()); if (!blk_crypto_wq) - goto fail_free_ksm; + goto fail_destroy_profile; blk_crypto_keyslots = kcalloc(blk_crypto_num_keyslots, sizeof(blk_crypto_keyslots[0]), @@ -596,8 +595,8 @@ static int blk_crypto_fallback_init(void) kfree(blk_crypto_keyslots); fail_free_wq: destroy_workqueue(blk_crypto_wq); -fail_free_ksm: - blk_ksm_destroy(&blk_crypto_ksm); +fail_destroy_profile: + blk_crypto_profile_destroy(profile); fail_free_bioset: bioset_exit(&crypto_bio_split); out: diff --git a/block/blk-crypto-profile.c b/block/blk-crypto-profile.c index a58daf93c9ba6..bd05f3f555d89 100644 --- a/block/blk-crypto-profile.c +++ b/block/blk-crypto-profile.c @@ -4,26 +4,22 @@ */ /** - * DOC: The Keyslot Manager + * DOC: blk-crypto profiles * - * Many devices with inline encryption support have a limited number of "slots" - * into which encryption contexts may be programmed, and requests can be tagged - * with a slot number to specify the key to use for en/decryption. + * 'struct blk_crypto_profile' contains all generic inline encryption-related + * state for a particular inline encryption device. blk_crypto_profile serves + * as the way that drivers for inline encryption hardware expose their crypto + * capabilities and certain functions (e.g., functions to program and evict + * keys) to upper layers. Device drivers that want to support inline encryption + * construct a crypto profile, then associate it with the disk's request_queue. * - * As the number of slots is limited, and programming keys is expensive on - * many inline encryption hardware, we don't want to program the same key into - * multiple slots - if multiple requests are using the same key, we want to - * program just one slot with that key and use that slot for all requests. + * If the device has keyslots, then its blk_crypto_profile also handles managing + * these keyslots in a device-independent way (using the driver-provided + * functions to program and evict keys as needed). This includes keeping track + * of which key and how many I/O requests are using each keyslot, getting + * keyslots for I/O requests, and handling key eviction requests. * - * The keyslot manager manages these keyslots appropriately, and also acts as - * an abstraction between the inline encryption hardware and the upper layers. - * - * Lower layer devices will set up a keyslot manager in their request queue - * and tell it how to perform device specific operations like programming/ - * evicting keys from keyslots. - * - * Upper layers will call blk_ksm_get_slot_for_key() to program a - * key into some slot in the inline encryption hardware. + * For more information, see Documentation/block/inline-encryption.rst. */ #define pr_fmt(fmt) "blk-crypto: " fmt @@ -36,77 +32,75 @@ #include #include -struct blk_ksm_keyslot { +struct blk_crypto_keyslot { atomic_t slot_refs; struct list_head idle_slot_node; struct hlist_node hash_node; const struct blk_crypto_key *key; - struct blk_keyslot_manager *ksm; + struct blk_crypto_profile *profile; }; -static inline void blk_ksm_hw_enter(struct blk_keyslot_manager *ksm) +static inline void blk_crypto_hw_enter(struct blk_crypto_profile *profile) { /* - * Calling into the driver requires ksm->lock held and the device + * Calling into the driver requires profile->lock held and the device * resumed. But we must resume the device first, since that can acquire - * and release ksm->lock via blk_ksm_reprogram_all_keys(). + * and release profile->lock via blk_crypto_reprogram_all_keys(). */ - if (ksm->dev) - pm_runtime_get_sync(ksm->dev); - down_write(&ksm->lock); + if (profile->dev) + pm_runtime_get_sync(profile->dev); + down_write(&profile->lock); } -static inline void blk_ksm_hw_exit(struct blk_keyslot_manager *ksm) +static inline void blk_crypto_hw_exit(struct blk_crypto_profile *profile) { - up_write(&ksm->lock); - if (ksm->dev) - pm_runtime_put_sync(ksm->dev); -} - -static inline bool blk_ksm_is_passthrough(struct blk_keyslot_manager *ksm) -{ - return ksm->num_slots == 0; + up_write(&profile->lock); + if (profile->dev) + pm_runtime_put_sync(profile->dev); } /** - * blk_ksm_init() - Initialize a keyslot manager - * @ksm: The keyslot_manager to initialize. - * @num_slots: The number of key slots to manage. + * blk_crypto_profile_init() - Initialize a blk_crypto_profile + * @profile: the blk_crypto_profile to initialize + * @num_slots: the number of keyslots * - * Allocate memory for keyslots and initialize a keyslot manager. Called by - * e.g. storage drivers to set up a keyslot manager in their request_queue. + * Storage drivers must call this when starting to set up a blk_crypto_profile, + * before filling in additional fields. * * Return: 0 on success, or else a negative error code. */ -int blk_ksm_init(struct blk_keyslot_manager *ksm, unsigned int num_slots) +int blk_crypto_profile_init(struct blk_crypto_profile *profile, + unsigned int num_slots) { unsigned int slot; unsigned int i; unsigned int slot_hashtable_size; - memset(ksm, 0, sizeof(*ksm)); + memset(profile, 0, sizeof(*profile)); + init_rwsem(&profile->lock); if (num_slots == 0) - return -EINVAL; + return 0; - ksm->slots = kvcalloc(num_slots, sizeof(ksm->slots[0]), GFP_KERNEL); - if (!ksm->slots) - return -ENOMEM; + /* Initialize keyslot management data. */ - ksm->num_slots = num_slots; + profile->slots = kvcalloc(num_slots, sizeof(profile->slots[0]), + GFP_KERNEL); + if (!profile->slots) + return -ENOMEM; - init_rwsem(&ksm->lock); + profile->num_slots = num_slots; - init_waitqueue_head(&ksm->idle_slots_wait_queue); - INIT_LIST_HEAD(&ksm->idle_slots); + init_waitqueue_head(&profile->idle_slots_wait_queue); + INIT_LIST_HEAD(&profile->idle_slots); for (slot = 0; slot < num_slots; slot++) { - ksm->slots[slot].ksm = ksm; - list_add_tail(&ksm->slots[slot].idle_slot_node, - &ksm->idle_slots); + profile->slots[slot].profile = profile; + list_add_tail(&profile->slots[slot].idle_slot_node, + &profile->idle_slots); } - spin_lock_init(&ksm->idle_slots_lock); + spin_lock_init(&profile->idle_slots_lock); slot_hashtable_size = roundup_pow_of_two(num_slots); /* @@ -116,74 +110,80 @@ int blk_ksm_init(struct blk_keyslot_manager *ksm, unsigned int num_slots) if (slot_hashtable_size < 2) slot_hashtable_size = 2; - ksm->log_slot_ht_size = ilog2(slot_hashtable_size); - ksm->slot_hashtable = kvmalloc_array(slot_hashtable_size, - sizeof(ksm->slot_hashtable[0]), - GFP_KERNEL); - if (!ksm->slot_hashtable) - goto err_destroy_ksm; + profile->log_slot_ht_size = ilog2(slot_hashtable_size); + profile->slot_hashtable = + kvmalloc_array(slot_hashtable_size, + sizeof(profile->slot_hashtable[0]), GFP_KERNEL); + if (!profile->slot_hashtable) + goto err_destroy; for (i = 0; i < slot_hashtable_size; i++) - INIT_HLIST_HEAD(&ksm->slot_hashtable[i]); + INIT_HLIST_HEAD(&profile->slot_hashtable[i]); return 0; -err_destroy_ksm: - blk_ksm_destroy(ksm); +err_destroy: + blk_crypto_profile_destroy(profile); return -ENOMEM; } -EXPORT_SYMBOL_GPL(blk_ksm_init); +EXPORT_SYMBOL_GPL(blk_crypto_profile_init); -static void blk_ksm_destroy_callback(void *ksm) +static void blk_crypto_profile_destroy_callback(void *profile) { - blk_ksm_destroy(ksm); + blk_crypto_profile_destroy(profile); } /** - * devm_blk_ksm_init() - Resource-managed blk_ksm_init() - * @dev: The device which owns the blk_keyslot_manager. - * @ksm: The blk_keyslot_manager to initialize. - * @num_slots: The number of key slots to manage. + * devm_blk_crypto_profile_init() - Resource-managed blk_crypto_profile_init() + * @dev: the device which owns the blk_crypto_profile + * @profile: the blk_crypto_profile to initialize + * @num_slots: the number of keyslots * - * Like blk_ksm_init(), but causes blk_ksm_destroy() to be called automatically - * on driver detach. + * Like blk_crypto_profile_init(), but causes blk_crypto_profile_destroy() to be + * called automatically on driver detach. * * Return: 0 on success, or else a negative error code. */ -int devm_blk_ksm_init(struct device *dev, struct blk_keyslot_manager *ksm, - unsigned int num_slots) +int devm_blk_crypto_profile_init(struct device *dev, + struct blk_crypto_profile *profile, + unsigned int num_slots) { - int err = blk_ksm_init(ksm, num_slots); + int err = blk_crypto_profile_init(profile, num_slots); if (err) return err; - return devm_add_action_or_reset(dev, blk_ksm_destroy_callback, ksm); + return devm_add_action_or_reset(dev, + blk_crypto_profile_destroy_callback, + profile); } -EXPORT_SYMBOL_GPL(devm_blk_ksm_init); +EXPORT_SYMBOL_GPL(devm_blk_crypto_profile_init); static inline struct hlist_head * -blk_ksm_hash_bucket_for_key(struct blk_keyslot_manager *ksm, +blk_crypto_hash_bucket_for_key(struct blk_crypto_profile *profile, const struct blk_crypto_key *key) { - return &ksm->slot_hashtable[hash_ptr(key, ksm->log_slot_ht_size)]; + return &profile->slot_hashtable[ + hash_ptr(key, profile->log_slot_ht_size)]; } -static void blk_ksm_remove_slot_from_lru_list(struct blk_ksm_keyslot *slot) +static void +blk_crypto_remove_slot_from_lru_list(struct blk_crypto_keyslot *slot) { - struct blk_keyslot_manager *ksm = slot->ksm; + struct blk_crypto_profile *profile = slot->profile; unsigned long flags; - spin_lock_irqsave(&ksm->idle_slots_lock, flags); + spin_lock_irqsave(&profile->idle_slots_lock, flags); list_del(&slot->idle_slot_node); - spin_unlock_irqrestore(&ksm->idle_slots_lock, flags); + spin_unlock_irqrestore(&profile->idle_slots_lock, flags); } -static struct blk_ksm_keyslot *blk_ksm_find_keyslot( - struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key) +static struct blk_crypto_keyslot * +blk_crypto_find_keyslot(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key) { - const struct hlist_head *head = blk_ksm_hash_bucket_for_key(ksm, key); - struct blk_ksm_keyslot *slotp; + const struct hlist_head *head = + blk_crypto_hash_bucket_for_key(profile, key); + struct blk_crypto_keyslot *slotp; hlist_for_each_entry(slotp, head, hash_node) { if (slotp->key == key) @@ -192,68 +192,79 @@ static struct blk_ksm_keyslot *blk_ksm_find_keyslot( return NULL; } -static struct blk_ksm_keyslot *blk_ksm_find_and_grab_keyslot( - struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key) +static struct blk_crypto_keyslot * +blk_crypto_find_and_grab_keyslot(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key) { - struct blk_ksm_keyslot *slot; + struct blk_crypto_keyslot *slot; - slot = blk_ksm_find_keyslot(ksm, key); + slot = blk_crypto_find_keyslot(profile, key); if (!slot) return NULL; if (atomic_inc_return(&slot->slot_refs) == 1) { /* Took first reference to this slot; remove it from LRU list */ - blk_ksm_remove_slot_from_lru_list(slot); + blk_crypto_remove_slot_from_lru_list(slot); } return slot; } -unsigned int blk_ksm_get_slot_idx(struct blk_ksm_keyslot *slot) +/** + * blk_crypto_keyslot_index() - Get the index of a keyslot + * @slot: a keyslot that blk_crypto_get_keyslot() returned + * + * Return: the 0-based index of the keyslot within the device's keyslots. + */ +unsigned int blk_crypto_keyslot_index(const struct blk_crypto_keyslot *slot) { - return slot - slot->ksm->slots; + return slot - slot->profile->slots; } -EXPORT_SYMBOL_GPL(blk_ksm_get_slot_idx); +EXPORT_SYMBOL_GPL(blk_crypto_keyslot_index); /** - * blk_ksm_get_slot_for_key() - Program a key into a keyslot. - * @ksm: The keyslot manager to program the key into. - * @key: Pointer to the key object to program, including the raw key, crypto - * mode, and data unit size. - * @slot_ptr: A pointer to return the pointer of the allocated keyslot. + * blk_crypto_get_keyslot() - Get a keyslot for a key, if needed. + * @profile: the crypto profile of the device the key is being used on + * @key: the key that will be used + * @slot_ptr: If a keyslot is allocated, an opaque pointer to the keyslot struct + * will be stored here; otherwise NULL will be stored here. + * + * If the device has keyslots, get a keyslot that's been programmed with the + * specified key. If the key is already in a slot, we'll reuse it; otherwise + * we'll wait for a slot to become idle and program the key into it. * - * Get a keyslot that's been programmed with the specified key. If one already - * exists, return it with incremented refcount. Otherwise, wait for a keyslot - * to become idle and program it. + * This must be paired with a call to blk_crypto_put_keyslot(). * - * Context: Process context. Takes and releases ksm->lock. - * Return: BLK_STS_OK on success (and keyslot is set to the pointer of the - * allocated keyslot), or some other blk_status_t otherwise (and - * keyslot is set to NULL). + * Context: Process context. Takes and releases profile->lock. + * Return: BLK_STS_OK on success, meaning that either a keyslot was allocated or + * one wasn't needed; or a blk_status_t error on failure. */ -blk_status_t blk_ksm_get_slot_for_key(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key, - struct blk_ksm_keyslot **slot_ptr) +blk_status_t blk_crypto_get_keyslot(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key, + struct blk_crypto_keyslot **slot_ptr) { - struct blk_ksm_keyslot *slot; + struct blk_crypto_keyslot *slot; int slot_idx; int err; *slot_ptr = NULL; - if (blk_ksm_is_passthrough(ksm)) + /* + * If the device has no concept of "keyslots", then there is no need to + * get one. + */ + if (profile->num_slots == 0) return BLK_STS_OK; - down_read(&ksm->lock); - slot = blk_ksm_find_and_grab_keyslot(ksm, key); - up_read(&ksm->lock); + down_read(&profile->lock); + slot = blk_crypto_find_and_grab_keyslot(profile, key); + up_read(&profile->lock); if (slot) goto success; for (;;) { - blk_ksm_hw_enter(ksm); - slot = blk_ksm_find_and_grab_keyslot(ksm, key); + blk_crypto_hw_enter(profile); + slot = blk_crypto_find_and_grab_keyslot(profile, key); if (slot) { - blk_ksm_hw_exit(ksm); + blk_crypto_hw_exit(profile); goto success; } @@ -261,22 +272,22 @@ blk_status_t blk_ksm_get_slot_for_key(struct blk_keyslot_manager *ksm, * If we're here, that means there wasn't a slot that was * already programmed with the key. So try to program it. */ - if (!list_empty(&ksm->idle_slots)) + if (!list_empty(&profile->idle_slots)) break; - blk_ksm_hw_exit(ksm); - wait_event(ksm->idle_slots_wait_queue, - !list_empty(&ksm->idle_slots)); + blk_crypto_hw_exit(profile); + wait_event(profile->idle_slots_wait_queue, + !list_empty(&profile->idle_slots)); } - slot = list_first_entry(&ksm->idle_slots, struct blk_ksm_keyslot, + slot = list_first_entry(&profile->idle_slots, struct blk_crypto_keyslot, idle_slot_node); - slot_idx = blk_ksm_get_slot_idx(slot); + slot_idx = blk_crypto_keyslot_index(slot); - err = ksm->ksm_ll_ops.keyslot_program(ksm, key, slot_idx); + err = profile->ll_ops.keyslot_program(profile, key, slot_idx); if (err) { - wake_up(&ksm->idle_slots_wait_queue); - blk_ksm_hw_exit(ksm); + wake_up(&profile->idle_slots_wait_queue); + blk_crypto_hw_exit(profile); return errno_to_blk_status(err); } @@ -284,97 +295,98 @@ blk_status_t blk_ksm_get_slot_for_key(struct blk_keyslot_manager *ksm, if (slot->key) hlist_del(&slot->hash_node); slot->key = key; - hlist_add_head(&slot->hash_node, blk_ksm_hash_bucket_for_key(ksm, key)); + hlist_add_head(&slot->hash_node, + blk_crypto_hash_bucket_for_key(profile, key)); atomic_set(&slot->slot_refs, 1); - blk_ksm_remove_slot_from_lru_list(slot); + blk_crypto_remove_slot_from_lru_list(slot); - blk_ksm_hw_exit(ksm); + blk_crypto_hw_exit(profile); success: *slot_ptr = slot; return BLK_STS_OK; } /** - * blk_ksm_put_slot() - Release a reference to a slot - * @slot: The keyslot to release the reference of. + * blk_crypto_put_keyslot() - Release a reference to a keyslot + * @slot: The keyslot to release the reference of (may be NULL). * * Context: Any context. */ -void blk_ksm_put_slot(struct blk_ksm_keyslot *slot) +void blk_crypto_put_keyslot(struct blk_crypto_keyslot *slot) { - struct blk_keyslot_manager *ksm; + struct blk_crypto_profile *profile; unsigned long flags; if (!slot) return; - ksm = slot->ksm; + profile = slot->profile; if (atomic_dec_and_lock_irqsave(&slot->slot_refs, - &ksm->idle_slots_lock, flags)) { - list_add_tail(&slot->idle_slot_node, &ksm->idle_slots); - spin_unlock_irqrestore(&ksm->idle_slots_lock, flags); - wake_up(&ksm->idle_slots_wait_queue); + &profile->idle_slots_lock, flags)) { + list_add_tail(&slot->idle_slot_node, &profile->idle_slots); + spin_unlock_irqrestore(&profile->idle_slots_lock, flags); + wake_up(&profile->idle_slots_wait_queue); } } /** - * blk_ksm_crypto_cfg_supported() - Find out if a crypto configuration is - * supported by a ksm. - * @ksm: The keyslot manager to check - * @cfg: The crypto configuration to check for. - * - * Checks for crypto_mode/data unit size/dun bytes support. + * __blk_crypto_cfg_supported() - Check whether the given crypto profile + * supports the given crypto configuration. + * @profile: the crypto profile to check + * @cfg: the crypto configuration to check for * - * Return: Whether or not this ksm supports the specified crypto config. + * Return: %true if @profile supports the given @cfg. */ -bool blk_ksm_crypto_cfg_supported(struct blk_keyslot_manager *ksm, - const struct blk_crypto_config *cfg) +bool __blk_crypto_cfg_supported(struct blk_crypto_profile *profile, + const struct blk_crypto_config *cfg) { - if (!ksm) + if (!profile) return false; - if (!(ksm->crypto_modes_supported[cfg->crypto_mode] & - cfg->data_unit_size)) + if (!(profile->modes_supported[cfg->crypto_mode] & cfg->data_unit_size)) return false; - if (ksm->max_dun_bytes_supported < cfg->dun_bytes) + if (profile->max_dun_bytes_supported < cfg->dun_bytes) return false; return true; } /** - * blk_ksm_evict_key() - Evict a key from the lower layer device. - * @ksm: The keyslot manager to evict from - * @key: The key to evict + * __blk_crypto_evict_key() - Evict a key from a device. + * @profile: the crypto profile of the device + * @key: the key to evict. It must not still be used in any I/O. + * + * If the device has keyslots, this finds the keyslot (if any) that contains the + * specified key and calls the driver's keyslot_evict function to evict it. * - * Find the keyslot that the specified key was programmed into, and evict that - * slot from the lower layer device. The slot must not be in use by any - * in-flight IO when this function is called. + * Otherwise, this just calls the driver's keyslot_evict function if it is + * implemented, passing just the key (without any particular keyslot). This + * allows layered devices to evict the key from their underlying devices. * - * Context: Process context. Takes and releases ksm->lock. + * Context: Process context. Takes and releases profile->lock. * Return: 0 on success or if there's no keyslot with the specified key, -EBUSY * if the keyslot is still in use, or another -errno value on other * error. */ -int blk_ksm_evict_key(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key) +int __blk_crypto_evict_key(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key) { - struct blk_ksm_keyslot *slot; + struct blk_crypto_keyslot *slot; int err = 0; - if (blk_ksm_is_passthrough(ksm)) { - if (ksm->ksm_ll_ops.keyslot_evict) { - blk_ksm_hw_enter(ksm); - err = ksm->ksm_ll_ops.keyslot_evict(ksm, key, -1); - blk_ksm_hw_exit(ksm); + if (profile->num_slots == 0) { + if (profile->ll_ops.keyslot_evict) { + blk_crypto_hw_enter(profile); + err = profile->ll_ops.keyslot_evict(profile, key, -1); + blk_crypto_hw_exit(profile); return err; } return 0; } - blk_ksm_hw_enter(ksm); - slot = blk_ksm_find_keyslot(ksm, key); + blk_crypto_hw_enter(profile); + slot = blk_crypto_find_keyslot(profile, key); if (!slot) goto out_unlock; @@ -382,8 +394,8 @@ int blk_ksm_evict_key(struct blk_keyslot_manager *ksm, err = -EBUSY; goto out_unlock; } - err = ksm->ksm_ll_ops.keyslot_evict(ksm, key, - blk_ksm_get_slot_idx(slot)); + err = profile->ll_ops.keyslot_evict(profile, key, + blk_crypto_keyslot_index(slot)); if (err) goto out_unlock; @@ -391,81 +403,84 @@ int blk_ksm_evict_key(struct blk_keyslot_manager *ksm, slot->key = NULL; err = 0; out_unlock: - blk_ksm_hw_exit(ksm); + blk_crypto_hw_exit(profile); return err; } /** - * blk_ksm_reprogram_all_keys() - Re-program all keyslots. - * @ksm: The keyslot manager + * blk_crypto_reprogram_all_keys() - Re-program all keyslots. + * @profile: The crypto profile * * Re-program all keyslots that are supposed to have a key programmed. This is * intended only for use by drivers for hardware that loses its keys on reset. * - * Context: Process context. Takes and releases ksm->lock. + * Context: Process context. Takes and releases profile->lock. */ -void blk_ksm_reprogram_all_keys(struct blk_keyslot_manager *ksm) +void blk_crypto_reprogram_all_keys(struct blk_crypto_profile *profile) { unsigned int slot; - if (blk_ksm_is_passthrough(ksm)) + if (profile->num_slots == 0) return; /* This is for device initialization, so don't resume the device */ - down_write(&ksm->lock); - for (slot = 0; slot < ksm->num_slots; slot++) { - const struct blk_crypto_key *key = ksm->slots[slot].key; + down_write(&profile->lock); + for (slot = 0; slot < profile->num_slots; slot++) { + const struct blk_crypto_key *key = profile->slots[slot].key; int err; if (!key) continue; - err = ksm->ksm_ll_ops.keyslot_program(ksm, key, slot); + err = profile->ll_ops.keyslot_program(profile, key, slot); WARN_ON(err); } - up_write(&ksm->lock); + up_write(&profile->lock); } -EXPORT_SYMBOL_GPL(blk_ksm_reprogram_all_keys); +EXPORT_SYMBOL_GPL(blk_crypto_reprogram_all_keys); -void blk_ksm_destroy(struct blk_keyslot_manager *ksm) +void blk_crypto_profile_destroy(struct blk_crypto_profile *profile) { - if (!ksm) + if (!profile) return; - kvfree(ksm->slot_hashtable); - kvfree_sensitive(ksm->slots, sizeof(ksm->slots[0]) * ksm->num_slots); - memzero_explicit(ksm, sizeof(*ksm)); + kvfree(profile->slot_hashtable); + kvfree_sensitive(profile->slots, + sizeof(profile->slots[0]) * profile->num_slots); + memzero_explicit(profile, sizeof(*profile)); } -EXPORT_SYMBOL_GPL(blk_ksm_destroy); +EXPORT_SYMBOL_GPL(blk_crypto_profile_destroy); -bool blk_ksm_register(struct blk_keyslot_manager *ksm, struct request_queue *q) +bool blk_crypto_register(struct blk_crypto_profile *profile, + struct request_queue *q) { if (blk_integrity_queue_supports_integrity(q)) { pr_warn("Integrity and hardware inline encryption are not supported together. Disabling hardware inline encryption.\n"); return false; } - q->ksm = ksm; + q->crypto_profile = profile; return true; } -EXPORT_SYMBOL_GPL(blk_ksm_register); +EXPORT_SYMBOL_GPL(blk_crypto_register); -void blk_ksm_unregister(struct request_queue *q) +void blk_crypto_unregister(struct request_queue *q) { - q->ksm = NULL; + q->crypto_profile = NULL; } /** - * blk_ksm_intersect_modes() - restrict supported modes by child device - * @parent: The keyslot manager for parent device - * @child: The keyslot manager for child device, or NULL + * blk_crypto_intersect_capabilities() - restrict supported crypto capabilities + * by child device + * @parent: the crypto profile for the parent device + * @child: the crypto profile for the child device, or NULL * - * Clear any crypto mode support bits in @parent that aren't set in @child. - * If @child is NULL, then all parent bits are cleared. + * Clear all crypto capabilities in @parent that aren't set in @child. If + * @child is NULL, then all parent capabilities are cleared. * - * Only use this when setting up the keyslot manager for a layered device, - * before it's been exposed yet. + * Only use this when setting up the crypto profile for a layered device, before + * it's been exposed yet. */ -void blk_ksm_intersect_modes(struct blk_keyslot_manager *parent, - const struct blk_keyslot_manager *child) +void blk_crypto_intersect_capabilities(struct blk_crypto_profile *parent, + const struct blk_crypto_profile *child) { if (child) { unsigned int i; @@ -473,73 +488,63 @@ void blk_ksm_intersect_modes(struct blk_keyslot_manager *parent, parent->max_dun_bytes_supported = min(parent->max_dun_bytes_supported, child->max_dun_bytes_supported); - for (i = 0; i < ARRAY_SIZE(child->crypto_modes_supported); - i++) { - parent->crypto_modes_supported[i] &= - child->crypto_modes_supported[i]; - } + for (i = 0; i < ARRAY_SIZE(child->modes_supported); i++) + parent->modes_supported[i] &= child->modes_supported[i]; } else { parent->max_dun_bytes_supported = 0; - memset(parent->crypto_modes_supported, 0, - sizeof(parent->crypto_modes_supported)); + memset(parent->modes_supported, 0, + sizeof(parent->modes_supported)); } } -EXPORT_SYMBOL_GPL(blk_ksm_intersect_modes); +EXPORT_SYMBOL_GPL(blk_crypto_intersect_capabilities); /** - * blk_ksm_is_superset() - Check if a KSM supports a superset of crypto modes - * and DUN bytes that another KSM supports. Here, - * "superset" refers to the mathematical meaning of the - * word - i.e. if two KSMs have the *same* capabilities, - * they *are* considered supersets of each other. - * @ksm_superset: The KSM that we want to verify is a superset - * @ksm_subset: The KSM that we want to verify is a subset + * blk_crypto_has_capabilities() - Check whether @target supports at least all + * the crypto capabilities that @reference does. + * @target: the target profile + * @reference: the reference profile * - * Return: True if @ksm_superset supports a superset of the crypto modes and DUN - * bytes that @ksm_subset supports. + * Return: %true if @target supports all the crypto capabilities of @reference. */ -bool blk_ksm_is_superset(struct blk_keyslot_manager *ksm_superset, - struct blk_keyslot_manager *ksm_subset) +bool blk_crypto_has_capabilities(const struct blk_crypto_profile *target, + const struct blk_crypto_profile *reference) { int i; - if (!ksm_subset) + if (!reference) return true; - if (!ksm_superset) + if (!target) return false; - for (i = 0; i < ARRAY_SIZE(ksm_superset->crypto_modes_supported); i++) { - if (ksm_subset->crypto_modes_supported[i] & - (~ksm_superset->crypto_modes_supported[i])) { + for (i = 0; i < ARRAY_SIZE(target->modes_supported); i++) { + if (reference->modes_supported[i] & ~target->modes_supported[i]) return false; - } } - if (ksm_subset->max_dun_bytes_supported > - ksm_superset->max_dun_bytes_supported) { + if (reference->max_dun_bytes_supported > + target->max_dun_bytes_supported) return false; - } return true; } -EXPORT_SYMBOL_GPL(blk_ksm_is_superset); +EXPORT_SYMBOL_GPL(blk_crypto_has_capabilities); /** - * blk_ksm_update_capabilities() - Update the restrictions of a KSM to those of - * another KSM - * @target_ksm: The KSM whose restrictions to update. - * @reference_ksm: The KSM to whose restrictions this function will update - * @target_ksm's restrictions to. + * blk_crypto_update_capabilities() - Update the capabilities of a crypto + * profile to match those of another crypto + * profile. + * @dst: The crypto profile whose capabilities to update. + * @src: The crypto profile whose capabilities this function will update @dst's + * capabilities to. * * Blk-crypto requires that crypto capabilities that were * advertised when a bio was created continue to be supported by the * device until that bio is ended. This is turn means that a device cannot * shrink its advertised crypto capabilities without any explicit * synchronization with upper layers. So if there's no such explicit - * synchronization, @reference_ksm must support all the crypto capabilities that - * @target_ksm does - * (i.e. we need blk_ksm_is_superset(@reference_ksm, @target_ksm) == true). + * synchronization, @src must support all the crypto capabilities that + * @dst does (i.e. we need blk_crypto_has_capabilities(@src, @dst)). * * Note also that as long as the crypto capabilities are being expanded, the * order of updates becoming visible is not important because it's alright @@ -548,31 +553,12 @@ EXPORT_SYMBOL_GPL(blk_ksm_is_superset); * might result in blk-crypto-fallback being used if available, or the bio being * failed). */ -void blk_ksm_update_capabilities(struct blk_keyslot_manager *target_ksm, - struct blk_keyslot_manager *reference_ksm) +void blk_crypto_update_capabilities(struct blk_crypto_profile *dst, + const struct blk_crypto_profile *src) { - memcpy(target_ksm->crypto_modes_supported, - reference_ksm->crypto_modes_supported, - sizeof(target_ksm->crypto_modes_supported)); + memcpy(dst->modes_supported, src->modes_supported, + sizeof(dst->modes_supported)); - target_ksm->max_dun_bytes_supported = - reference_ksm->max_dun_bytes_supported; -} -EXPORT_SYMBOL_GPL(blk_ksm_update_capabilities); - -/** - * blk_ksm_init_passthrough() - Init a passthrough keyslot manager - * @ksm: The keyslot manager to init - * - * Initialize a passthrough keyslot manager. - * Called by e.g. storage drivers to set up a keyslot manager in their - * request_queue, when the storage driver wants to manage its keys by itself. - * This is useful for inline encryption hardware that doesn't have the concept - * of keyslots, and for layered devices. - */ -void blk_ksm_init_passthrough(struct blk_keyslot_manager *ksm) -{ - memset(ksm, 0, sizeof(*ksm)); - init_rwsem(&ksm->lock); + dst->max_dun_bytes_supported = src->max_dun_bytes_supported; } -EXPORT_SYMBOL_GPL(blk_ksm_init_passthrough); +EXPORT_SYMBOL_GPL(blk_crypto_update_capabilities); diff --git a/block/blk-crypto.c b/block/blk-crypto.c index 9102803d36232..b14c258ab8cd9 100644 --- a/block/blk-crypto.c +++ b/block/blk-crypto.c @@ -218,8 +218,9 @@ static bool bio_crypt_check_alignment(struct bio *bio) blk_status_t __blk_crypto_init_request(struct request *rq) { - return blk_ksm_get_slot_for_key(rq->q->ksm, rq->crypt_ctx->bc_key, - &rq->crypt_keyslot); + return blk_crypto_get_keyslot(rq->q->crypto_profile, + rq->crypt_ctx->bc_key, + &rq->crypt_keyslot); } /** @@ -233,7 +234,7 @@ blk_status_t __blk_crypto_init_request(struct request *rq) */ void __blk_crypto_free_request(struct request *rq) { - blk_ksm_put_slot(rq->crypt_keyslot); + blk_crypto_put_keyslot(rq->crypt_keyslot); mempool_free(rq->crypt_ctx, bio_crypt_ctx_pool); blk_crypto_rq_set_defaults(rq); } @@ -264,6 +265,7 @@ bool __blk_crypto_bio_prep(struct bio **bio_ptr) { struct bio *bio = *bio_ptr; const struct blk_crypto_key *bc_key = bio->bi_crypt_context->bc_key; + struct blk_crypto_profile *profile; /* Error if bio has no data. */ if (WARN_ON_ONCE(!bio_has_data(bio))) { @@ -280,8 +282,8 @@ bool __blk_crypto_bio_prep(struct bio **bio_ptr) * Success if device supports the encryption context, or if we succeeded * in falling back to the crypto API. */ - if (blk_ksm_crypto_cfg_supported(bio->bi_bdev->bd_disk->queue->ksm, - &bc_key->crypto_cfg)) + profile = bio->bi_bdev->bd_disk->queue->crypto_profile; + if (__blk_crypto_cfg_supported(profile, &bc_key->crypto_cfg)) return true; if (blk_crypto_fallback_bio_prep(bio_ptr)) @@ -357,7 +359,7 @@ bool blk_crypto_config_supported(struct request_queue *q, const struct blk_crypto_config *cfg) { return IS_ENABLED(CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK) || - blk_ksm_crypto_cfg_supported(q->ksm, cfg); + __blk_crypto_cfg_supported(q->crypto_profile, cfg); } /** @@ -378,7 +380,7 @@ bool blk_crypto_config_supported(struct request_queue *q, int blk_crypto_start_using_key(const struct blk_crypto_key *key, struct request_queue *q) { - if (blk_ksm_crypto_cfg_supported(q->ksm, &key->crypto_cfg)) + if (__blk_crypto_cfg_supported(q->crypto_profile, &key->crypto_cfg)) return 0; return blk_crypto_fallback_start_using_mode(key->crypto_cfg.crypto_mode); } @@ -394,18 +396,17 @@ int blk_crypto_start_using_key(const struct blk_crypto_key *key, * evicted from any hardware that it might have been programmed into. The key * must not be in use by any in-flight IO when this function is called. * - * Return: 0 on success or if key is not present in the q's ksm, -err on error. + * Return: 0 on success or if the key wasn't in any keyslot; -errno on error. */ int blk_crypto_evict_key(struct request_queue *q, const struct blk_crypto_key *key) { - if (blk_ksm_crypto_cfg_supported(q->ksm, &key->crypto_cfg)) - return blk_ksm_evict_key(q->ksm, key); + if (__blk_crypto_cfg_supported(q->crypto_profile, &key->crypto_cfg)) + return __blk_crypto_evict_key(q->crypto_profile, key); /* - * If the request queue's associated inline encryption hardware didn't - * have support for the key, then the key might have been programmed - * into the fallback keyslot manager, so try to evict from there. + * If the request_queue didn't support the key, then blk-crypto-fallback + * may have been used, so try to evict the key from blk-crypto-fallback. */ return blk_crypto_fallback_evict_key(key); } diff --git a/block/blk-integrity.c b/block/blk-integrity.c index 69a12177dfb62..60a907f49cc28 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -409,9 +409,9 @@ void blk_integrity_register(struct gendisk *disk, struct blk_integrity *template blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, disk->queue); #ifdef CONFIG_BLK_INLINE_ENCRYPTION - if (disk->queue->ksm) { + if (disk->queue->crypto_profile) { pr_warn("blk-integrity: Integrity and hardware inline encryption are not supported together. Disabling hardware inline encryption.\n"); - blk_ksm_unregister(disk->queue); + blk_crypto_unregister(disk->queue); } #endif } diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h index 841ed87999e79..b855fef4f38a6 100644 --- a/drivers/md/dm-core.h +++ b/drivers/md/dm-core.h @@ -200,7 +200,7 @@ struct dm_table { struct dm_md_mempools *mempools; #ifdef CONFIG_BLK_INLINE_ENCRYPTION - struct blk_keyslot_manager *ksm; + struct blk_crypto_profile *crypto_profile; #endif }; diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 2111daaacabaf..63c414a1bd677 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -169,7 +169,7 @@ static void free_devices(struct list_head *devices, struct mapped_device *md) } } -static void dm_table_destroy_keyslot_manager(struct dm_table *t); +static void dm_table_destroy_crypto_profile(struct dm_table *t); void dm_table_destroy(struct dm_table *t) { @@ -199,7 +199,7 @@ void dm_table_destroy(struct dm_table *t) dm_free_md_mempools(t->mempools); - dm_table_destroy_keyslot_manager(t); + dm_table_destroy_crypto_profile(t); kfree(t); } @@ -1186,8 +1186,8 @@ static int dm_table_register_integrity(struct dm_table *t) #ifdef CONFIG_BLK_INLINE_ENCRYPTION -struct dm_keyslot_manager { - struct blk_keyslot_manager ksm; +struct dm_crypto_profile { + struct blk_crypto_profile profile; struct mapped_device *md; }; @@ -1213,13 +1213,11 @@ static int dm_keyslot_evict_callback(struct dm_target *ti, struct dm_dev *dev, * When an inline encryption key is evicted from a device-mapper device, evict * it from all the underlying devices. */ -static int dm_keyslot_evict(struct blk_keyslot_manager *ksm, +static int dm_keyslot_evict(struct blk_crypto_profile *profile, const struct blk_crypto_key *key, unsigned int slot) { - struct dm_keyslot_manager *dksm = container_of(ksm, - struct dm_keyslot_manager, - ksm); - struct mapped_device *md = dksm->md; + struct mapped_device *md = + container_of(profile, struct dm_crypto_profile, profile)->md; struct dm_keyslot_evict_args args = { key }; struct dm_table *t; int srcu_idx; @@ -1239,150 +1237,148 @@ static int dm_keyslot_evict(struct blk_keyslot_manager *ksm, return args.err; } -static const struct blk_ksm_ll_ops dm_ksm_ll_ops = { - .keyslot_evict = dm_keyslot_evict, -}; - -static int device_intersect_crypto_modes(struct dm_target *ti, - struct dm_dev *dev, sector_t start, - sector_t len, void *data) +static int +device_intersect_crypto_capabilities(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t len, void *data) { - struct blk_keyslot_manager *parent = data; - struct blk_keyslot_manager *child = bdev_get_queue(dev->bdev)->ksm; + struct blk_crypto_profile *parent = data; + struct blk_crypto_profile *child = + bdev_get_queue(dev->bdev)->crypto_profile; - blk_ksm_intersect_modes(parent, child); + blk_crypto_intersect_capabilities(parent, child); return 0; } -void dm_destroy_keyslot_manager(struct blk_keyslot_manager *ksm) +void dm_destroy_crypto_profile(struct blk_crypto_profile *profile) { - struct dm_keyslot_manager *dksm = container_of(ksm, - struct dm_keyslot_manager, - ksm); + struct dm_crypto_profile *dmcp = container_of(profile, + struct dm_crypto_profile, + profile); - if (!ksm) + if (!profile) return; - blk_ksm_destroy(ksm); - kfree(dksm); + blk_crypto_profile_destroy(profile); + kfree(dmcp); } -static void dm_table_destroy_keyslot_manager(struct dm_table *t) +static void dm_table_destroy_crypto_profile(struct dm_table *t) { - dm_destroy_keyslot_manager(t->ksm); - t->ksm = NULL; + dm_destroy_crypto_profile(t->crypto_profile); + t->crypto_profile = NULL; } /* - * Constructs and initializes t->ksm with a keyslot manager that - * represents the common set of crypto capabilities of the devices - * described by the dm_table. However, if the constructed keyslot - * manager does not support a superset of the crypto capabilities - * supported by the current keyslot manager of the mapped_device, - * it returns an error instead, since we don't support restricting - * crypto capabilities on table changes. Finally, if the constructed - * keyslot manager doesn't actually support any crypto modes at all, - * it just returns NULL. + * Constructs and initializes t->crypto_profile with a crypto profile that + * represents the common set of crypto capabilities of the devices described by + * the dm_table. However, if the constructed crypto profile doesn't support all + * crypto capabilities that are supported by the current mapped_device, it + * returns an error instead, since we don't support removing crypto capabilities + * on table changes. Finally, if the constructed crypto profile is "empty" (has + * no crypto capabilities at all), it just sets t->crypto_profile to NULL. */ -static int dm_table_construct_keyslot_manager(struct dm_table *t) +static int dm_table_construct_crypto_profile(struct dm_table *t) { - struct dm_keyslot_manager *dksm; - struct blk_keyslot_manager *ksm; + struct dm_crypto_profile *dmcp; + struct blk_crypto_profile *profile; struct dm_target *ti; unsigned int i; - bool ksm_is_empty = true; + bool empty_profile = true; - dksm = kmalloc(sizeof(*dksm), GFP_KERNEL); - if (!dksm) + dmcp = kmalloc(sizeof(*dmcp), GFP_KERNEL); + if (!dmcp) return -ENOMEM; - dksm->md = t->md; + dmcp->md = t->md; - ksm = &dksm->ksm; - blk_ksm_init_passthrough(ksm); - ksm->ksm_ll_ops = dm_ksm_ll_ops; - ksm->max_dun_bytes_supported = UINT_MAX; - memset(ksm->crypto_modes_supported, 0xFF, - sizeof(ksm->crypto_modes_supported)); + profile = &dmcp->profile; + blk_crypto_profile_init(profile, 0); + profile->ll_ops.keyslot_evict = dm_keyslot_evict; + profile->max_dun_bytes_supported = UINT_MAX; + memset(profile->modes_supported, 0xFF, + sizeof(profile->modes_supported)); for (i = 0; i < dm_table_get_num_targets(t); i++) { ti = dm_table_get_target(t, i); if (!dm_target_passes_crypto(ti->type)) { - blk_ksm_intersect_modes(ksm, NULL); + blk_crypto_intersect_capabilities(profile, NULL); break; } if (!ti->type->iterate_devices) continue; - ti->type->iterate_devices(ti, device_intersect_crypto_modes, - ksm); + ti->type->iterate_devices(ti, + device_intersect_crypto_capabilities, + profile); } - if (t->md->queue && !blk_ksm_is_superset(ksm, t->md->queue->ksm)) { + if (t->md->queue && + !blk_crypto_has_capabilities(profile, + t->md->queue->crypto_profile)) { DMWARN("Inline encryption capabilities of new DM table were more restrictive than the old table's. This is not supported!"); - dm_destroy_keyslot_manager(ksm); + dm_destroy_crypto_profile(profile); return -EINVAL; } /* - * If the new KSM doesn't actually support any crypto modes, we may as - * well represent it with a NULL ksm. + * If the new profile doesn't actually support any crypto capabilities, + * we may as well represent it with a NULL profile. */ - ksm_is_empty = true; - for (i = 0; i < ARRAY_SIZE(ksm->crypto_modes_supported); i++) { - if (ksm->crypto_modes_supported[i]) { - ksm_is_empty = false; + for (i = 0; i < ARRAY_SIZE(profile->modes_supported); i++) { + if (profile->modes_supported[i]) { + empty_profile = false; break; } } - if (ksm_is_empty) { - dm_destroy_keyslot_manager(ksm); - ksm = NULL; + if (empty_profile) { + dm_destroy_crypto_profile(profile); + profile = NULL; } /* - * t->ksm is only set temporarily while the table is being set - * up, and it gets set to NULL after the capabilities have - * been transferred to the request_queue. + * t->crypto_profile is only set temporarily while the table is being + * set up, and it gets set to NULL after the profile has been + * transferred to the request_queue. */ - t->ksm = ksm; + t->crypto_profile = profile; return 0; } -static void dm_update_keyslot_manager(struct request_queue *q, - struct dm_table *t) +static void dm_update_crypto_profile(struct request_queue *q, + struct dm_table *t) { - if (!t->ksm) + if (!t->crypto_profile) return; - /* Make the ksm less restrictive */ - if (!q->ksm) { - blk_ksm_register(t->ksm, q); + /* Make the crypto profile less restrictive. */ + if (!q->crypto_profile) { + blk_crypto_register(t->crypto_profile, q); } else { - blk_ksm_update_capabilities(q->ksm, t->ksm); - dm_destroy_keyslot_manager(t->ksm); + blk_crypto_update_capabilities(q->crypto_profile, + t->crypto_profile); + dm_destroy_crypto_profile(t->crypto_profile); } - t->ksm = NULL; + t->crypto_profile = NULL; } #else /* CONFIG_BLK_INLINE_ENCRYPTION */ -static int dm_table_construct_keyslot_manager(struct dm_table *t) +static int dm_table_construct_crypto_profile(struct dm_table *t) { return 0; } -void dm_destroy_keyslot_manager(struct blk_keyslot_manager *ksm) +void dm_destroy_crypto_profile(struct blk_crypto_profile *profile) { } -static void dm_table_destroy_keyslot_manager(struct dm_table *t) +static void dm_table_destroy_crypto_profile(struct dm_table *t) { } -static void dm_update_keyslot_manager(struct request_queue *q, - struct dm_table *t) +static void dm_update_crypto_profile(struct request_queue *q, + struct dm_table *t) { } @@ -1414,9 +1410,9 @@ int dm_table_complete(struct dm_table *t) return r; } - r = dm_table_construct_keyslot_manager(t); + r = dm_table_construct_crypto_profile(t); if (r) { - DMERR("could not construct keyslot manager."); + DMERR("could not construct crypto profile."); return r; } @@ -2070,7 +2066,7 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, return r; } - dm_update_keyslot_manager(q, t); + dm_update_crypto_profile(q, t); disk_update_readahead(t->md->disk); return 0; diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 249223e20d3d0..f5b4f40a7fd63 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1668,14 +1668,14 @@ static const struct dax_operations dm_dax_ops; static void dm_wq_work(struct work_struct *work); #ifdef CONFIG_BLK_INLINE_ENCRYPTION -static void dm_queue_destroy_keyslot_manager(struct request_queue *q) +static void dm_queue_destroy_crypto_profile(struct request_queue *q) { - dm_destroy_keyslot_manager(q->ksm); + dm_destroy_crypto_profile(q->crypto_profile); } #else /* CONFIG_BLK_INLINE_ENCRYPTION */ -static inline void dm_queue_destroy_keyslot_manager(struct request_queue *q) +static inline void dm_queue_destroy_crypto_profile(struct request_queue *q) { } #endif /* !CONFIG_BLK_INLINE_ENCRYPTION */ @@ -1701,7 +1701,7 @@ static void cleanup_mapped_device(struct mapped_device *md) dm_sysfs_exit(md); del_gendisk(md->disk); } - dm_queue_destroy_keyslot_manager(md->queue); + dm_queue_destroy_crypto_profile(md->queue); blk_cleanup_disk(md->disk); } diff --git a/drivers/mmc/core/crypto.c b/drivers/mmc/core/crypto.c index 67557808cada5..fec4fbf16a5b6 100644 --- a/drivers/mmc/core/crypto.c +++ b/drivers/mmc/core/crypto.c @@ -16,13 +16,13 @@ void mmc_crypto_set_initial_state(struct mmc_host *host) { /* Reset might clear all keys, so reprogram all the keys. */ if (host->caps2 & MMC_CAP2_CRYPTO) - blk_ksm_reprogram_all_keys(&host->ksm); + blk_crypto_reprogram_all_keys(&host->crypto_profile); } void mmc_crypto_setup_queue(struct request_queue *q, struct mmc_host *host) { if (host->caps2 & MMC_CAP2_CRYPTO) - blk_ksm_register(&host->ksm, q); + blk_crypto_register(&host->crypto_profile, q); } EXPORT_SYMBOL_GPL(mmc_crypto_setup_queue); @@ -30,12 +30,15 @@ void mmc_crypto_prepare_req(struct mmc_queue_req *mqrq) { struct request *req = mmc_queue_req_to_req(mqrq); struct mmc_request *mrq = &mqrq->brq.mrq; + struct blk_crypto_keyslot *keyslot; if (!req->crypt_ctx) return; mrq->crypto_ctx = req->crypt_ctx; - if (req->crypt_keyslot) - mrq->crypto_key_slot = blk_ksm_get_slot_idx(req->crypt_keyslot); + + keyslot = req->crypt_keyslot; + if (keyslot) + mrq->crypto_key_slot = blk_crypto_keyslot_index(keyslot); } EXPORT_SYMBOL_GPL(mmc_crypto_prepare_req); diff --git a/drivers/mmc/host/cqhci-crypto.c b/drivers/mmc/host/cqhci-crypto.c index 628bbfaf83124..d5f4b6972f63e 100644 --- a/drivers/mmc/host/cqhci-crypto.c +++ b/drivers/mmc/host/cqhci-crypto.c @@ -23,9 +23,10 @@ static const struct cqhci_crypto_alg_entry { }; static inline struct cqhci_host * -cqhci_host_from_ksm(struct blk_keyslot_manager *ksm) +cqhci_host_from_crypto_profile(struct blk_crypto_profile *profile) { - struct mmc_host *mmc = container_of(ksm, struct mmc_host, ksm); + struct mmc_host *mmc = + container_of(profile, struct mmc_host, crypto_profile); return mmc->cqe_private; } @@ -57,12 +58,12 @@ static int cqhci_crypto_program_key(struct cqhci_host *cq_host, return 0; } -static int cqhci_crypto_keyslot_program(struct blk_keyslot_manager *ksm, +static int cqhci_crypto_keyslot_program(struct blk_crypto_profile *profile, const struct blk_crypto_key *key, unsigned int slot) { - struct cqhci_host *cq_host = cqhci_host_from_ksm(ksm); + struct cqhci_host *cq_host = cqhci_host_from_crypto_profile(profile); const union cqhci_crypto_cap_entry *ccap_array = cq_host->crypto_cap_array; const struct cqhci_crypto_alg_entry *alg = @@ -115,11 +116,11 @@ static int cqhci_crypto_clear_keyslot(struct cqhci_host *cq_host, int slot) return cqhci_crypto_program_key(cq_host, &cfg, slot); } -static int cqhci_crypto_keyslot_evict(struct blk_keyslot_manager *ksm, +static int cqhci_crypto_keyslot_evict(struct blk_crypto_profile *profile, const struct blk_crypto_key *key, unsigned int slot) { - struct cqhci_host *cq_host = cqhci_host_from_ksm(ksm); + struct cqhci_host *cq_host = cqhci_host_from_crypto_profile(profile); return cqhci_crypto_clear_keyslot(cq_host, slot); } @@ -132,7 +133,7 @@ static int cqhci_crypto_keyslot_evict(struct blk_keyslot_manager *ksm, * "enabled" when these are called, i.e. CQHCI_ENABLE might not be set in the * CQHCI_CFG register. But the hardware allows that. */ -static const struct blk_ksm_ll_ops cqhci_ksm_ops = { +static const struct blk_crypto_ll_ops cqhci_crypto_ops = { .keyslot_program = cqhci_crypto_keyslot_program, .keyslot_evict = cqhci_crypto_keyslot_evict, }; @@ -157,8 +158,8 @@ cqhci_find_blk_crypto_mode(union cqhci_crypto_cap_entry cap) * * If the driver previously set MMC_CAP2_CRYPTO and the CQE declares * CQHCI_CAP_CS, initialize the crypto support. This involves reading the - * crypto capability registers, initializing the keyslot manager, clearing all - * keyslots, and enabling 128-bit task descriptors. + * crypto capability registers, initializing the blk_crypto_profile, clearing + * all keyslots, and enabling 128-bit task descriptors. * * Return: 0 if crypto was initialized or isn't supported; whether * MMC_CAP2_CRYPTO remains set indicates which one of those cases it is. @@ -168,7 +169,7 @@ int cqhci_crypto_init(struct cqhci_host *cq_host) { struct mmc_host *mmc = cq_host->mmc; struct device *dev = mmc_dev(mmc); - struct blk_keyslot_manager *ksm = &mmc->ksm; + struct blk_crypto_profile *profile = &mmc->crypto_profile; unsigned int num_keyslots; unsigned int cap_idx; enum blk_crypto_mode_num blk_mode_num; @@ -199,15 +200,15 @@ int cqhci_crypto_init(struct cqhci_host *cq_host) */ num_keyslots = cq_host->crypto_capabilities.config_count + 1; - err = devm_blk_ksm_init(dev, ksm, num_keyslots); + err = devm_blk_crypto_profile_init(dev, profile, num_keyslots); if (err) goto out; - ksm->ksm_ll_ops = cqhci_ksm_ops; - ksm->dev = dev; + profile->ll_ops = cqhci_crypto_ops; + profile->dev = dev; /* Unfortunately, CQHCI crypto only supports 32 DUN bits. */ - ksm->max_dun_bytes_supported = 4; + profile->max_dun_bytes_supported = 4; /* * Cache all the crypto capabilities and advertise the supported crypto @@ -223,7 +224,7 @@ int cqhci_crypto_init(struct cqhci_host *cq_host) cq_host->crypto_cap_array[cap_idx]); if (blk_mode_num == BLK_ENCRYPTION_MODE_INVALID) continue; - ksm->crypto_modes_supported[blk_mode_num] |= + profile->modes_supported[blk_mode_num] |= cq_host->crypto_cap_array[cap_idx].sdus_mask * 512; } diff --git a/drivers/scsi/ufs/ufshcd-crypto.c b/drivers/scsi/ufs/ufshcd-crypto.c index d70cdcd35e435..67402baf6faee 100644 --- a/drivers/scsi/ufs/ufshcd-crypto.c +++ b/drivers/scsi/ufs/ufshcd-crypto.c @@ -48,11 +48,12 @@ static int ufshcd_program_key(struct ufs_hba *hba, return err; } -static int ufshcd_crypto_keyslot_program(struct blk_keyslot_manager *ksm, +static int ufshcd_crypto_keyslot_program(struct blk_crypto_profile *profile, const struct blk_crypto_key *key, unsigned int slot) { - struct ufs_hba *hba = container_of(ksm, struct ufs_hba, ksm); + struct ufs_hba *hba = + container_of(profile, struct ufs_hba, crypto_profile); const union ufs_crypto_cap_entry *ccap_array = hba->crypto_cap_array; const struct ufs_crypto_alg_entry *alg = &ufs_crypto_algs[key->crypto_cfg.crypto_mode]; @@ -105,11 +106,12 @@ static int ufshcd_clear_keyslot(struct ufs_hba *hba, int slot) return ufshcd_program_key(hba, &cfg, slot); } -static int ufshcd_crypto_keyslot_evict(struct blk_keyslot_manager *ksm, +static int ufshcd_crypto_keyslot_evict(struct blk_crypto_profile *profile, const struct blk_crypto_key *key, unsigned int slot) { - struct ufs_hba *hba = container_of(ksm, struct ufs_hba, ksm); + struct ufs_hba *hba = + container_of(profile, struct ufs_hba, crypto_profile); return ufshcd_clear_keyslot(hba, slot); } @@ -120,11 +122,11 @@ bool ufshcd_crypto_enable(struct ufs_hba *hba) return false; /* Reset might clear all keys, so reprogram all the keys. */ - blk_ksm_reprogram_all_keys(&hba->ksm); + blk_crypto_reprogram_all_keys(&hba->crypto_profile); return true; } -static const struct blk_ksm_ll_ops ufshcd_ksm_ops = { +static const struct blk_crypto_ll_ops ufshcd_crypto_ops = { .keyslot_program = ufshcd_crypto_keyslot_program, .keyslot_evict = ufshcd_crypto_keyslot_evict, }; @@ -179,15 +181,16 @@ int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba) } /* The actual number of configurations supported is (CFGC+1) */ - err = devm_blk_ksm_init(hba->dev, &hba->ksm, - hba->crypto_capabilities.config_count + 1); + err = devm_blk_crypto_profile_init( + hba->dev, &hba->crypto_profile, + hba->crypto_capabilities.config_count + 1); if (err) goto out; - hba->ksm.ksm_ll_ops = ufshcd_ksm_ops; + hba->crypto_profile.ll_ops = ufshcd_crypto_ops; /* UFS only supports 8 bytes for any DUN */ - hba->ksm.max_dun_bytes_supported = 8; - hba->ksm.dev = hba->dev; + hba->crypto_profile.max_dun_bytes_supported = 8; + hba->crypto_profile.dev = hba->dev; /* * Cache all the UFS crypto capabilities and advertise the supported @@ -202,7 +205,7 @@ int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba) blk_mode_num = ufshcd_find_blk_crypto_mode( hba->crypto_cap_array[cap_idx]); if (blk_mode_num != BLK_ENCRYPTION_MODE_INVALID) - hba->ksm.crypto_modes_supported[blk_mode_num] |= + hba->crypto_profile.modes_supported[blk_mode_num] |= hba->crypto_cap_array[cap_idx].sdus_mask * 512; } @@ -230,9 +233,8 @@ void ufshcd_init_crypto(struct ufs_hba *hba) ufshcd_clear_keyslot(hba, slot); } -void ufshcd_crypto_setup_rq_keyslot_manager(struct ufs_hba *hba, - struct request_queue *q) +void ufshcd_crypto_register(struct ufs_hba *hba, struct request_queue *q) { if (hba->caps & UFSHCD_CAP_CRYPTO) - blk_ksm_register(&hba->ksm, q); + blk_crypto_register(&hba->crypto_profile, q); } diff --git a/drivers/scsi/ufs/ufshcd-crypto.h b/drivers/scsi/ufs/ufshcd-crypto.h index 78a58e788dff9..e18c012768732 100644 --- a/drivers/scsi/ufs/ufshcd-crypto.h +++ b/drivers/scsi/ufs/ufshcd-crypto.h @@ -18,7 +18,7 @@ static inline void ufshcd_prepare_lrbp_crypto(struct request *rq, return; } - lrbp->crypto_key_slot = blk_ksm_get_slot_idx(rq->crypt_keyslot); + lrbp->crypto_key_slot = blk_crypto_keyslot_index(rq->crypt_keyslot); lrbp->data_unit_num = rq->crypt_ctx->bc_dun[0]; } @@ -40,8 +40,7 @@ int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba); void ufshcd_init_crypto(struct ufs_hba *hba); -void ufshcd_crypto_setup_rq_keyslot_manager(struct ufs_hba *hba, - struct request_queue *q); +void ufshcd_crypto_register(struct ufs_hba *hba, struct request_queue *q); #else /* CONFIG_SCSI_UFS_CRYPTO */ @@ -64,8 +63,8 @@ static inline int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba) static inline void ufshcd_init_crypto(struct ufs_hba *hba) { } -static inline void ufshcd_crypto_setup_rq_keyslot_manager(struct ufs_hba *hba, - struct request_queue *q) { } +static inline void ufshcd_crypto_register(struct ufs_hba *hba, + struct request_queue *q) { } #endif /* CONFIG_SCSI_UFS_CRYPTO */ diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 3841ab49f5560..2782e7e2c9b7e 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5017,7 +5017,7 @@ static int ufshcd_slave_configure(struct scsi_device *sdev) else if (ufshcd_is_rpm_autosuspend_allowed(hba)) sdev->rpm_autosuspend = 1; - ufshcd_crypto_setup_rq_keyslot_manager(hba, q); + ufshcd_crypto_register(hba, q); return 0; } diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 0f9cbe74642fe..df5439b122085 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -764,7 +764,7 @@ struct ufs_hba_monitor { * @crypto_capabilities: Content of crypto capabilities register (0x100) * @crypto_cap_array: Array of crypto capabilities * @crypto_cfg_register: Start of the crypto cfg array - * @ksm: the keyslot manager tied to this hba + * @crypto_profile: the crypto profile of this hba (if applicable) */ struct ufs_hba { void __iomem *mmio_base; @@ -905,7 +905,7 @@ struct ufs_hba { union ufs_crypto_capabilities crypto_capabilities; union ufs_crypto_cap_entry *crypto_cap_array; u32 crypto_cfg_register; - struct blk_keyslot_manager ksm; + struct blk_crypto_profile crypto_profile; #endif #ifdef CONFIG_DEBUG_FS struct dentry *debugfs_root; diff --git a/include/linux/blk-crypto-profile.h b/include/linux/blk-crypto-profile.h index a27605e2f8260..e967b189d81db 100644 --- a/include/linux/blk-crypto-profile.h +++ b/include/linux/blk-crypto-profile.h @@ -3,67 +3,113 @@ * Copyright 2019 Google LLC */ -#ifndef __LINUX_KEYSLOT_MANAGER_H -#define __LINUX_KEYSLOT_MANAGER_H +#ifndef __LINUX_BLK_CRYPTO_PROFILE_H +#define __LINUX_BLK_CRYPTO_PROFILE_H #include #include -struct blk_keyslot_manager; +struct blk_crypto_profile; /** - * struct blk_ksm_ll_ops - functions to manage keyslots in hardware - * @keyslot_program: Program the specified key into the specified slot in the - * inline encryption hardware. - * @keyslot_evict: Evict key from the specified keyslot in the hardware. - * The key is provided so that e.g. dm layers can evict - * keys from the devices that they map over. - * Returns 0 on success, -errno otherwise. + * struct blk_crypto_ll_ops - functions to control inline encryption hardware * - * This structure should be provided by storage device drivers when they set up - * a keyslot manager - this structure holds the function ptrs that the keyslot - * manager will use to manipulate keyslots in the hardware. + * Low-level operations for controlling inline encryption hardware. This + * interface must be implemented by storage drivers that support inline + * encryption. All functions may sleep, are serialized by profile->lock, and + * are never called while profile->dev (if set) is runtime-suspended. */ -struct blk_ksm_ll_ops { - int (*keyslot_program)(struct blk_keyslot_manager *ksm, +struct blk_crypto_ll_ops { + + /** + * @keyslot_program: Program a key into the inline encryption hardware. + * + * Program @key into the specified @slot in the inline encryption + * hardware, overwriting any key that the keyslot may already contain. + * The keyslot is guaranteed to not be in-use by any I/O. + * + * This is required if the device has keyslots. Otherwise (i.e. if the + * device is a layered device, or if the device is real hardware that + * simply doesn't have the concept of keyslots) it is never called. + * + * Must return 0 on success, or -errno on failure. + */ + int (*keyslot_program)(struct blk_crypto_profile *profile, const struct blk_crypto_key *key, unsigned int slot); - int (*keyslot_evict)(struct blk_keyslot_manager *ksm, + + /** + * @keyslot_evict: Evict a key from the inline encryption hardware. + * + * If the device has keyslots, this function must evict the key from the + * specified @slot. The slot will contain @key, but there should be no + * need for the @key argument to be used as @slot should be sufficient. + * The keyslot is guaranteed to not be in-use by any I/O. + * + * If the device doesn't have keyslots itself, this function must evict + * @key from any underlying devices. @slot won't be valid in this case. + * + * If there are no keyslots and no underlying devices, this function + * isn't required. + * + * Must return 0 on success, or -errno on failure. + */ + int (*keyslot_evict)(struct blk_crypto_profile *profile, const struct blk_crypto_key *key, unsigned int slot); }; -struct blk_keyslot_manager { - /* - * The struct blk_ksm_ll_ops that this keyslot manager will use - * to perform operations like programming and evicting keys on the - * device +/** + * struct blk_crypto_profile - inline encryption profile for a device + * + * This struct contains a storage device's inline encryption capabilities (e.g. + * the supported crypto algorithms), driver-provided functions to control the + * inline encryption hardware (e.g. programming and evicting keys), and optional + * device-independent keyslot management data. + */ +struct blk_crypto_profile { + + /* public: Drivers must initialize the following fields. */ + + /** + * @ll_ops: Driver-provided functions to control the inline encryption + * hardware, e.g. program and evict keys. */ - struct blk_ksm_ll_ops ksm_ll_ops; + struct blk_crypto_ll_ops ll_ops; - /* - * The maximum number of bytes supported for specifying the data unit - * number. + /** + * @max_dun_bytes_supported: The maximum number of bytes supported for + * specifying the data unit number (DUN). Specifically, the range of + * supported DUNs is 0 through (1 << (8 * max_dun_bytes_supported)) - 1. */ unsigned int max_dun_bytes_supported; - /* - * Array of size BLK_ENCRYPTION_MODE_MAX of bitmasks that represents - * whether a crypto mode and data unit size are supported. The i'th - * bit of crypto_mode_supported[crypto_mode] is set iff a data unit - * size of (1 << i) is supported. We only support data unit sizes - * that are powers of 2. + /** + * @modes_supported: Array of bitmasks that specifies whether + * each combination of crypto mode and data unit size is supported. + * Specifically, the i'th bit of crypto_mode_supported[crypto_mode] is + * set if crypto_mode can be used with a data unit size of (1 << i). + * Note that we can only support data unit sizes that are powers of 2. */ - unsigned int crypto_modes_supported[BLK_ENCRYPTION_MODE_MAX]; + unsigned int modes_supported[BLK_ENCRYPTION_MODE_MAX]; - /* Device for runtime power management (NULL if none) */ + /** + * @dev: An optional device for runtime power management. If the driver + * provides this device, it will be runtime-resumed before any function + * in @ll_ops is called and will remain resumed during the call. + */ struct device *dev; - /* Here onwards are *private* fields for internal keyslot manager use */ + /* private: The following fields shouldn't be accessed by drivers. */ + /* Number of keyslots, or 0 if not applicable */ unsigned int num_slots; - /* Protects programming and evicting keys from the device */ + /* + * Serializes all calls to functions in @ll_ops, as well as all changes + * to @slot_hashtable. This can also be taken in read mode to look up + * keyslots while ensuring that they can't be concurrently changed. + */ struct rw_semaphore lock; /* List of idle slots, with least recently used slot at front */ @@ -80,41 +126,41 @@ struct blk_keyslot_manager { unsigned int log_slot_ht_size; /* Per-keyslot data */ - struct blk_ksm_keyslot *slots; + struct blk_crypto_keyslot *slots; }; -int blk_ksm_init(struct blk_keyslot_manager *ksm, unsigned int num_slots); - -int devm_blk_ksm_init(struct device *dev, struct blk_keyslot_manager *ksm, - unsigned int num_slots); +int blk_crypto_profile_init(struct blk_crypto_profile *profile, + unsigned int num_slots); -blk_status_t blk_ksm_get_slot_for_key(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key, - struct blk_ksm_keyslot **slot_ptr); +int devm_blk_crypto_profile_init(struct device *dev, + struct blk_crypto_profile *profile, + unsigned int num_slots); -unsigned int blk_ksm_get_slot_idx(struct blk_ksm_keyslot *slot); +unsigned int blk_crypto_keyslot_index(const struct blk_crypto_keyslot *slot); -void blk_ksm_put_slot(struct blk_ksm_keyslot *slot); +blk_status_t blk_crypto_get_keyslot(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key, + struct blk_crypto_keyslot **slot_ptr); -bool blk_ksm_crypto_cfg_supported(struct blk_keyslot_manager *ksm, - const struct blk_crypto_config *cfg); +void blk_crypto_put_keyslot(struct blk_crypto_keyslot *slot); -int blk_ksm_evict_key(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key); +bool __blk_crypto_cfg_supported(struct blk_crypto_profile *profile, + const struct blk_crypto_config *cfg); -void blk_ksm_reprogram_all_keys(struct blk_keyslot_manager *ksm); +int __blk_crypto_evict_key(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key); -void blk_ksm_destroy(struct blk_keyslot_manager *ksm); +void blk_crypto_reprogram_all_keys(struct blk_crypto_profile *profile); -void blk_ksm_intersect_modes(struct blk_keyslot_manager *parent, - const struct blk_keyslot_manager *child); +void blk_crypto_profile_destroy(struct blk_crypto_profile *profile); -void blk_ksm_init_passthrough(struct blk_keyslot_manager *ksm); +void blk_crypto_intersect_capabilities(struct blk_crypto_profile *parent, + const struct blk_crypto_profile *child); -bool blk_ksm_is_superset(struct blk_keyslot_manager *ksm_superset, - struct blk_keyslot_manager *ksm_subset); +bool blk_crypto_has_capabilities(const struct blk_crypto_profile *target, + const struct blk_crypto_profile *reference); -void blk_ksm_update_capabilities(struct blk_keyslot_manager *target_ksm, - struct blk_keyslot_manager *reference_ksm); +void blk_crypto_update_capabilities(struct blk_crypto_profile *dst, + const struct blk_crypto_profile *src); -#endif /* __LINUX_KEYSLOT_MANAGER_H */ +#endif /* __LINUX_BLK_CRYPTO_PROFILE_H */ diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 12b9dbcc980ee..356567520c725 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -37,7 +37,7 @@ struct pr_ops; struct rq_qos; struct blk_queue_stats; struct blk_stat_callback; -struct blk_keyslot_manager; +struct blk_crypto_profile; #define BLKDEV_MIN_RQ 4 #define BLKDEV_MAX_RQ 128 /* Default maximum */ @@ -211,7 +211,7 @@ struct request { #ifdef CONFIG_BLK_INLINE_ENCRYPTION struct bio_crypt_ctx *crypt_ctx; - struct blk_ksm_keyslot *crypt_keyslot; + struct blk_crypto_keyslot *crypt_keyslot; #endif unsigned short write_hint; @@ -444,8 +444,7 @@ struct request_queue { unsigned int dma_alignment; #ifdef CONFIG_BLK_INLINE_ENCRYPTION - /* Inline crypto capabilities */ - struct blk_keyslot_manager *ksm; + struct blk_crypto_profile *crypto_profile; #endif unsigned int rq_timeout; @@ -1813,19 +1812,20 @@ static inline struct bio_vec *rq_integrity_vec(struct request *rq) #ifdef CONFIG_BLK_INLINE_ENCRYPTION -bool blk_ksm_register(struct blk_keyslot_manager *ksm, struct request_queue *q); +bool blk_crypto_register(struct blk_crypto_profile *profile, + struct request_queue *q); -void blk_ksm_unregister(struct request_queue *q); +void blk_crypto_unregister(struct request_queue *q); #else /* CONFIG_BLK_INLINE_ENCRYPTION */ -static inline bool blk_ksm_register(struct blk_keyslot_manager *ksm, - struct request_queue *q) +static inline bool blk_crypto_register(struct blk_crypto_profile *profile, + struct request_queue *q) { return true; } -static inline void blk_ksm_unregister(struct request_queue *q) { } +static inline void blk_crypto_unregister(struct request_queue *q) { } #endif /* CONFIG_BLK_INLINE_ENCRYPTION */ diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 114553b487ef4..a7df155ea49b8 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -576,9 +576,9 @@ struct dm_table *dm_swap_table(struct mapped_device *md, struct dm_table *t); /* - * Table keyslot manager functions + * Table blk_crypto_profile functions */ -void dm_destroy_keyslot_manager(struct blk_keyslot_manager *ksm); +void dm_destroy_crypto_profile(struct blk_crypto_profile *profile); /*----------------------------------------------------------------- * Macros. diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 725b1de417673..52eae8c45b8d6 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -492,7 +492,7 @@ struct mmc_host { /* Inline encryption support */ #ifdef CONFIG_MMC_CRYPTO - struct blk_keyslot_manager ksm; + struct blk_crypto_profile crypto_profile; #endif /* Host Software Queue support */