From patchwork Wed Jul 10 22:56:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Satya Tangirala X-Patchwork-Id: 11039035 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7160617EF for ; Wed, 10 Jul 2019 22:56:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 652542882D for ; Wed, 10 Jul 2019 22:56:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 58A2228867; Wed, 10 Jul 2019 22:56:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 48CCD2882D for ; Wed, 10 Jul 2019 22:56:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727581AbfGJW4Y (ORCPT ); Wed, 10 Jul 2019 18:56:24 -0400 Received: from mail-pl1-f201.google.com ([209.85.214.201]:36235 "EHLO mail-pl1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727721AbfGJW4Y (ORCPT ); Wed, 10 Jul 2019 18:56:24 -0400 Received: by mail-pl1-f201.google.com with SMTP id a5so2071866pla.3 for ; Wed, 10 Jul 2019 15:56:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=qYSGFpNSJhKp475kALq7yHbfHYEidLwstNNnaj8Vm00=; b=RY/JUR/ovXiATuQN2sVPwNsg051cPJ7ctqq5roz2j1YrORWyyYyh7VXZHvAFRN4sca u2DAZJTutaHsquEXT/dVxvhoxlSPahqbPqdSQvBhnK2KhRqJEHxshRQNwk7pgReItd0h 48SWHQqIU7n352dqZ3p8PeCLRWCckoNro6fsul/u+am65SAIfQF1PLpaR1QtBnKkJq1D jtZl4zSLX9XvMr4mKoMPPw8fm++UQDraMJ8jSmbPkOSpCBG+HQANE3TF9+WaCBR4w9kO r3gFJ8t1iZ4lPV3rGgBQJBBImh8nzIkAv/7wmXSE/HodxjLspHJD4rTY8Xkz8t7+jK3d YeFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=qYSGFpNSJhKp475kALq7yHbfHYEidLwstNNnaj8Vm00=; b=K01IvjMLafXWUZCV4w+AwCl9Wr5xYeM8JkIJPCm2twAtMIAcARjL7rL5aLdEGsSSsy b1x4/CT9R20rcYjC8pRM9RGUu43fzO/H9p3N5x7eE3IDy4Wk55SsPDapkTStalW/wEf9 Kxy+H+05gbKXWmV6sbbr6wDQ8xzKkABVcWFKP5pyKCvrSdhVk+wSytdxKHdve3vi0hRu zzg7MvhDyGZmRMYfWpimtHDcoJXPo6UGf0YZ0btIppUT6nDssZD7lrJGLu3euWDWYOWa aZdCnUaBkkqMZVnZCOtRReeKhkWt2g5C/bq5gjFfMaVam/l6qQdHgpf+ADXSiCM2VF/R FHYQ== X-Gm-Message-State: APjAAAUHuI78nEQqpwi8Y2gz1rtx8GqtPMLODOLq1X27tBxassrhmvnm JBpzw3z2dd6pmDi9JcK0nZ/NG5LmAl8fPd6OgFMhDbnRTBR/p1oJH31oE6QoqobpscN/WO4hGzC MzXk3fWzSuqixuk0rx0nHf8iB6684HNnvU7IJV10IzyCDSNYkmwMjyt/iql9LPZQXNNZe X-Google-Smtp-Source: APXvYqxdChk3ZixHz0ohSloSlvQAKjRO7ndDr9TxN3nyYAaGpw3TM2FhIEV4VCiLwBqz1MvJ/ETjGVbw4OY= X-Received: by 2002:a63:db47:: with SMTP id x7mr720621pgi.375.1562799382881; Wed, 10 Jul 2019 15:56:22 -0700 (PDT) Date: Wed, 10 Jul 2019 15:56:03 -0700 In-Reply-To: <20190710225609.192252-1-satyat@google.com> Message-Id: <20190710225609.192252-3-satyat@google.com> Mime-Version: 1.0 References: <20190710225609.192252-1-satyat@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH 2/8] block: Add encryption context to struct bio From: Satya Tangirala To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Parshuram Raju Thombare , Ladvine D Almeida , Barani Muthukumaran , Kuohong Wang , Greg Kroah-Hartman , Satya Tangirala Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We must have some way of letting a storage device driver know what encryption context it should use for en/decrypting a request. However, it's the filesystem/fscrypt that knows about and manages encryption contexts. As such, when the filesystem layer submits a bio to the block layer, and this bio eventually reaches a device driver with support for inline encryption, the device driver will need to have been told the encryption context for that bio. We want to communicate the encryption context from the filesystem layer to the storage device along with the bio, when the bio is submitted to the block layer. To do this, we add a struct bio_crypt_ctx to struct bio, which can represent an encryption context (note that we can't use the bi_private field in struct bio to do this because that field does not function to pass information across layers in the storage stack). We also introduce various functions to manipulate the bio_crypt_ctx and make the bio/request merging logic aware of the bio_crypt_ctx. Signed-off-by: Satya Tangirala --- block/Makefile | 2 +- block/bio-crypt-ctx.c | 117 +++++++++++++++++++++++ block/bio.c | 11 ++- block/blk-merge.c | 34 ++++++- block/bounce.c | 9 +- drivers/md/dm.c | 15 ++- include/linux/bio.h | 190 ++++++++++++++++++++++++++++++++++++++ include/linux/blk_types.h | 7 ++ 8 files changed, 371 insertions(+), 14 deletions(-) create mode 100644 block/bio-crypt-ctx.c diff --git a/block/Makefile b/block/Makefile index a72abd61b220..4147ffa63631 100644 --- a/block/Makefile +++ b/block/Makefile @@ -35,4 +35,4 @@ obj-$(CONFIG_BLK_DEBUG_FS) += blk-mq-debugfs.o obj-$(CONFIG_BLK_DEBUG_FS_ZONED)+= blk-mq-debugfs-zoned.o obj-$(CONFIG_BLK_SED_OPAL) += sed-opal.o obj-$(CONFIG_BLK_PM) += blk-pm.o -obj-$(CONFIG_BLK_INLINE_ENCRYPTION) += keyslot-manager.o +obj-$(CONFIG_BLK_INLINE_ENCRYPTION) += keyslot-manager.o bio-crypt-ctx.o diff --git a/block/bio-crypt-ctx.c b/block/bio-crypt-ctx.c new file mode 100644 index 000000000000..8b884ef32007 --- /dev/null +++ b/block/bio-crypt-ctx.c @@ -0,0 +1,117 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 Google LLC + */ + +#include +#include +#include +#include + +struct bio_crypt_ctx *bio_crypt_alloc_ctx(gfp_t gfp_mask) +{ + return kzalloc(sizeof(struct bio_crypt_ctx), gfp_mask); +} +EXPORT_SYMBOL(bio_crypt_alloc_ctx); + +void bio_crypt_free_ctx(struct bio *bio) +{ + kzfree(bio->bi_crypt_context); + bio->bi_crypt_context = NULL; +} +EXPORT_SYMBOL(bio_crypt_free_ctx); + +int bio_crypt_clone(struct bio *dst, struct bio *src, gfp_t gfp_mask) +{ + if (!bio_is_encrypted(src)) + return 0; + + dst->bi_crypt_context = bio_crypt_alloc_ctx(gfp_mask); + if (!dst->bi_crypt_context) + return -ENOMEM; + + *dst->bi_crypt_context = *src->bi_crypt_context; + + if (bio_crypt_has_keyslot(src)) + keyslot_manager_get_slot(src->bi_crypt_context->processing_ksm, + src->bi_crypt_context->keyslot); + + return 0; +} +EXPORT_SYMBOL(bio_crypt_clone); + +bool bio_crypt_should_process(struct bio *bio, struct request_queue *q) +{ + if (!bio_is_encrypted(bio)) + return false; + + WARN_ON(!bio_crypt_has_keyslot(bio)); + return q->ksm == bio->bi_crypt_context->processing_ksm; +} +EXPORT_SYMBOL(bio_crypt_should_process); + +/* + * Checks that two bio crypt contexts are compatible - i.e. that + * they are mergeable except for data_unit_num continuity. + */ +bool bio_crypt_ctx_compatible(struct bio *b_1, struct bio *b_2) +{ + struct bio_crypt_ctx *bc1 = b_1->bi_crypt_context; + struct bio_crypt_ctx *bc2 = b_2->bi_crypt_context; + + if (bio_is_encrypted(b_1) != bio_is_encrypted(b_2)) + return false; + + if (!bio_is_encrypted(b_1)) + return true; + + return bc1->keyslot == bc2->keyslot && + bc1->data_unit_size_bits == bc2->data_unit_size_bits; +} + +/* + * Checks that two bio crypt contexts are compatible, and also + * that their data_unit_nums are continuous (and can hence be merged) + */ +bool bio_crypt_ctx_back_mergeable(struct bio *b_1, + unsigned int b1_sectors, + struct bio *b_2) +{ + struct bio_crypt_ctx *bc1 = b_1->bi_crypt_context; + struct bio_crypt_ctx *bc2 = b_2->bi_crypt_context; + + if (!bio_crypt_ctx_compatible(b_1, b_2)) + return false; + + return !bio_is_encrypted(b_1) || + (bc1->data_unit_num + + (b1_sectors >> (bc1->data_unit_size_bits - 9)) == + bc2->data_unit_num); +} + +void bio_crypt_ctx_release_keyslot(struct bio *bio) +{ + struct bio_crypt_ctx *crypt_ctx = bio->bi_crypt_context; + + keyslot_manager_put_slot(crypt_ctx->processing_ksm, crypt_ctx->keyslot); + bio->bi_crypt_context->processing_ksm = NULL; + bio->bi_crypt_context->keyslot = -1; +} + +int bio_crypt_ctx_acquire_keyslot(struct bio *bio, struct keyslot_manager *ksm) +{ + int slot; + enum blk_crypt_mode_num crypt_mode = bio_crypt_mode(bio); + + if (!ksm) + return -ENOMEM; + + slot = keyslot_manager_get_slot_for_key(ksm, + bio_crypt_raw_key(bio), crypt_mode, + 1 << bio->bi_crypt_context->data_unit_size_bits); + if (slot < 0) + return slot; + + bio_crypt_set_keyslot(bio, slot, ksm); + return 0; +} diff --git a/block/bio.c b/block/bio.c index ce797d73bb43..2a272cda6dfa 100644 --- a/block/bio.c +++ b/block/bio.c @@ -240,6 +240,7 @@ static void bio_free(struct bio *bio) struct bio_set *bs = bio->bi_pool; void *p; + bio_crypt_free_ctx(bio); bio_uninit(bio); if (bs) { @@ -612,6 +613,7 @@ EXPORT_SYMBOL(__bio_clone_fast); struct bio *bio_clone_fast(struct bio *bio, gfp_t gfp_mask, struct bio_set *bs) { struct bio *b; + int ret; b = bio_alloc_bioset(gfp_mask, 0, bs); if (!b) @@ -619,9 +621,13 @@ struct bio *bio_clone_fast(struct bio *bio, gfp_t gfp_mask, struct bio_set *bs) __bio_clone_fast(b, bio); - if (bio_integrity(bio)) { - int ret; + ret = bio_crypt_clone(b, bio, gfp_mask); + if (ret < 0) { + bio_put(b); + return NULL; + } + if (bio_integrity(bio)) { ret = bio_integrity_clone(b, bio, gfp_mask); if (ret < 0) { @@ -1022,6 +1028,7 @@ void bio_advance(struct bio *bio, unsigned bytes) if (bio_integrity(bio)) bio_integrity_advance(bio, bytes); + bio_crypt_advance(bio, bytes); bio_advance_iter(bio, &bio->bi_iter, bytes); } EXPORT_SYMBOL(bio_advance); diff --git a/block/blk-merge.c b/block/blk-merge.c index 17713d7d98d5..f416e7f38270 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -531,6 +531,9 @@ static inline int ll_new_hw_segment(struct request_queue *q, if (blk_integrity_merge_bio(q, req, bio) == false) goto no_merge; + if (WARN_ON(!bio_crypt_ctx_compatible(bio, req->bio))) + goto no_merge; + /* * This will form the start of a new hw segment. Bump both * counters. @@ -696,8 +699,13 @@ static enum elv_merge blk_try_req_merge(struct request *req, { if (blk_discard_mergable(req)) return ELEVATOR_DISCARD_MERGE; - else if (blk_rq_pos(req) + blk_rq_sectors(req) == blk_rq_pos(next)) + else if (blk_rq_pos(req) + blk_rq_sectors(req) == blk_rq_pos(next)) { + if (!bio_crypt_ctx_back_mergeable( + req->bio, blk_rq_sectors(req), next->bio)) { + return ELEVATOR_NO_MERGE; + } return ELEVATOR_BACK_MERGE; + } return ELEVATOR_NO_MERGE; } @@ -733,6 +741,9 @@ static struct request *attempt_merge(struct request_queue *q, if (req->ioprio != next->ioprio) return NULL; + if (!bio_crypt_ctx_compatible(req->bio, next->bio)) + return NULL; + /* * If we are allowed to merge, then append bio list * from next to rq and release next. merge_requests_fn @@ -865,16 +876,31 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio) if (rq->ioprio != bio_prio(bio)) return false; + /* Only merge if the crypt contexts are compatible */ + if (!bio_crypt_ctx_compatible(bio, rq->bio)) + return false; + return true; } enum elv_merge blk_try_merge(struct request *rq, struct bio *bio) { - if (blk_discard_mergable(rq)) + if (blk_discard_mergable(rq)) { return ELEVATOR_DISCARD_MERGE; - else if (blk_rq_pos(rq) + blk_rq_sectors(rq) == bio->bi_iter.bi_sector) + } else if (blk_rq_pos(rq) + blk_rq_sectors(rq) == + bio->bi_iter.bi_sector) { + if (!bio_crypt_ctx_back_mergeable(rq->bio, + blk_rq_sectors(rq), bio)) { + return ELEVATOR_NO_MERGE; + } return ELEVATOR_BACK_MERGE; - else if (blk_rq_pos(rq) - bio_sectors(bio) == bio->bi_iter.bi_sector) + } else if (blk_rq_pos(rq) - bio_sectors(bio) == + bio->bi_iter.bi_sector) { + if (!bio_crypt_ctx_back_mergeable(bio, + bio_sectors(bio), rq->bio)) { + return ELEVATOR_NO_MERGE; + } return ELEVATOR_FRONT_MERGE; + } return ELEVATOR_NO_MERGE; } diff --git a/block/bounce.c b/block/bounce.c index f8ed677a1bf7..1307238d3951 100644 --- a/block/bounce.c +++ b/block/bounce.c @@ -220,6 +220,7 @@ static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask, struct bvec_iter iter; struct bio_vec bv; struct bio *bio; + int ret; /* * Pre immutable biovecs, __bio_clone() used to just do a memcpy from @@ -267,9 +268,13 @@ static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask, break; } - if (bio_integrity(bio_src)) { - int ret; + ret = bio_crypt_clone(bio, bio_src, gfp_mask); + if (ret < 0) { + bio_put(bio); + return NULL; + } + if (bio_integrity(bio_src)) { ret = bio_integrity_clone(bio, bio_src, gfp_mask); if (ret < 0) { bio_put(bio); diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 5475081dcbd6..22517d03aa39 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1324,12 +1324,15 @@ static int clone_bio(struct dm_target_io *tio, struct bio *bio, sector_t sector, unsigned len) { struct bio *clone = &tio->clone; + int ret; __bio_clone_fast(clone, bio); - if (bio_integrity(bio)) { - int r; + ret = bio_crypt_clone(clone, bio, GFP_NOIO); + if (ret < 0) + return ret; + if (bio_integrity(bio)) { if (unlikely(!dm_target_has_integrity(tio->ti->type) && !dm_target_passes_integrity(tio->ti->type))) { DMWARN("%s: the target %s doesn't support integrity data.", @@ -1338,9 +1341,11 @@ static int clone_bio(struct dm_target_io *tio, struct bio *bio, return -EIO; } - r = bio_integrity_clone(clone, bio, GFP_NOIO); - if (r < 0) - return r; + ret = bio_integrity_clone(clone, bio, GFP_NOIO); + if (ret < 0) { + bio_crypt_free_ctx(clone); + return ret; + } } bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector)); diff --git a/include/linux/bio.h b/include/linux/bio.h index ef9c6e2e92bc..4e664d6441d5 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -572,6 +572,196 @@ enum blk_crypt_mode_num { */ }; +#ifdef CONFIG_BLK_INLINE_ENCRYPTION +struct bio_crypt_ctx { + int keyslot; + u8 *raw_key; + enum blk_crypt_mode_num crypt_mode; + u64 data_unit_num; + unsigned int data_unit_size_bits; + + /* + * The keyslot manager where the key has been programmed + * with keyslot. + */ + struct keyslot_manager *processing_ksm; + + /* + * Copy of the bvec_iter when this bio was submitted. + * We only want to en/decrypt the part of the bio + * as described by the bvec_iter upon submission because + * bio might be split before being resubmitted + */ + struct bvec_iter crypt_iter; + u64 sw_data_unit_num; +}; + +extern int bio_crypt_clone(struct bio *dst, struct bio *src, + gfp_t gfp_mask); + +static inline bool bio_is_encrypted(struct bio *bio) +{ + return bio->bi_crypt_context; +} + +static inline void bio_crypt_advance(struct bio *bio, unsigned int bytes) +{ + if (bio_is_encrypted(bio)) { + bio->bi_crypt_context->data_unit_num += + bytes >> bio->bi_crypt_context->data_unit_size_bits; + } +} + +static inline bool bio_crypt_has_keyslot(struct bio *bio) +{ + return bio->bi_crypt_context->keyslot >= 0; +} + +extern struct bio_crypt_ctx *bio_crypt_alloc_ctx(gfp_t gfp_mask); + +extern void bio_crypt_free_ctx(struct bio *bio); + +static inline int bio_crypt_set_ctx(struct bio *bio, + u8 *raw_key, + enum blk_crypt_mode_num crypt_mode, + u64 dun, + unsigned int dun_bits) +{ + struct bio_crypt_ctx *crypt_ctx; + + crypt_ctx = bio_crypt_alloc_ctx(GFP_NOIO); + if (!crypt_ctx) + return -ENOMEM; + + crypt_ctx->raw_key = raw_key; + crypt_ctx->data_unit_num = dun; + crypt_ctx->data_unit_size_bits = dun_bits; + crypt_ctx->crypt_mode = crypt_mode; + crypt_ctx->processing_ksm = NULL; + crypt_ctx->keyslot = -1; + bio->bi_crypt_context = crypt_ctx; + + return 0; +} + +static inline int bio_crypt_get_keyslot(struct bio *bio) +{ + return bio->bi_crypt_context->keyslot; +} + +static inline void bio_crypt_set_keyslot(struct bio *bio, + unsigned int keyslot, + struct keyslot_manager *ksm) +{ + bio->bi_crypt_context->keyslot = keyslot; + bio->bi_crypt_context->processing_ksm = ksm; +} + +extern void bio_crypt_ctx_release_keyslot(struct bio *bio); + +extern int bio_crypt_ctx_acquire_keyslot(struct bio *bio, + struct keyslot_manager *ksm); + +static inline u8 *bio_crypt_raw_key(struct bio *bio) +{ + return bio->bi_crypt_context->raw_key; +} + +static inline enum blk_crypt_mode_num bio_crypt_mode(struct bio *bio) +{ + return bio->bi_crypt_context->crypt_mode; +} + +static inline u64 bio_crypt_data_unit_num(struct bio *bio) +{ + WARN_ON(!bio_is_encrypted(bio)); + return bio->bi_crypt_context->data_unit_num; +} + +static inline u64 bio_crypt_sw_data_unit_num(struct bio *bio) +{ + WARN_ON(!bio_is_encrypted(bio)); + return bio->bi_crypt_context->sw_data_unit_num; +} + +extern bool bio_crypt_should_process(struct bio *bio, struct request_queue *q); + +extern bool bio_crypt_ctx_compatible(struct bio *b_1, struct bio *b_2); + +extern bool bio_crypt_ctx_back_mergeable(struct bio *b_1, + unsigned int b1_sectors, + struct bio *b_2); + +#else /* CONFIG_BLK_INLINE_ENCRYPTION */ +struct keyslot_manager; + +static inline int bio_crypt_clone(struct bio *dst, struct bio *src, + gfp_t gfp_mask) +{ + return 0; +} + +static inline void bio_crypt_advance(struct bio *bio, + unsigned int bytes) { } + +static inline bool bio_is_encrypted(struct bio *bio) +{ + return false; +} + +static inline void bio_crypt_free_ctx(struct bio *bio) { } + +static inline void bio_crypt_set_ctx(struct bio *bio, + u8 *raw_key, + enum blk_crypt_mode_num crypt_mode, + u64 dun, + unsigned int dun_bits) { } + +static inline bool bio_crypt_has_keyslot(struct bio *bio) +{ + return false; +} + +static inline void bio_crypt_set_keyslot(struct bio *bio, + unsigned int keyslot, + struct keyslot_manager *ksm) { } + +static inline int bio_crypt_get_keyslot(struct bio *bio) +{ + return -1; +} + +static inline u8 *bio_crypt_raw_key(struct bio *bio) +{ + return NULL; +} + +static inline u64 bio_crypt_data_unit_num(struct bio *bio) +{ + WARN_ON(1); + return 0; +} + +static inline bool bio_crypt_should_process(struct bio *bio, + struct request_queue *q) +{ + return false; +} + +static inline bool bio_crypt_ctx_compatible(struct bio *b_1, struct bio *b_2) +{ + return true; +} + +static inline bool bio_crypt_ctx_back_mergeable(struct bio *b_1, + unsigned int b1_sectors, + struct bio *b_2) +{ + return true; +} + +#endif /* CONFIG_BLK_INLINE_ENCRYPTION */ + /* * BIO list management for use by remapping drivers (e.g. DM or MD) and loop. * diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 95202f80676c..0b794fe3530a 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -137,6 +137,8 @@ static inline void bio_issue_init(struct bio_issue *issue, ((u64)size << BIO_ISSUE_SIZE_SHIFT)); } +struct bio_crypt_ctx; + /* * main unit of I/O for the block layer and lower layers (ie drivers and * stacking drivers) @@ -175,6 +177,11 @@ struct bio { struct blkcg_gq *bi_blkg; struct bio_issue bi_issue; #endif + +#ifdef CONFIG_BLK_INLINE_ENCRYPTION + struct bio_crypt_ctx *bi_crypt_context; +#endif + union { #if defined(CONFIG_BLK_DEV_INTEGRITY) struct bio_integrity_payload *bi_integrity; /* data integrity */