From patchwork Wed Apr 8 03:56:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Satya Tangirala X-Patchwork-Id: 11479271 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 72ED514B4 for ; Wed, 8 Apr 2020 03:57:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 47E112082D for ; Wed, 8 Apr 2020 03:57:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="DSLU7V6+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726575AbgDHD5k (ORCPT ); Tue, 7 Apr 2020 23:57:40 -0400 Received: from mail-pf1-f201.google.com ([209.85.210.201]:47491 "EHLO mail-pf1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726706AbgDHD5d (ORCPT ); Tue, 7 Apr 2020 23:57:33 -0400 Received: by mail-pf1-f201.google.com with SMTP id h191so4306032pfe.14 for ; Tue, 07 Apr 2020 20:57:33 -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=SNJVaB+s7ZA11pYXdqQ6GcpK3Mhuq0zk8K56zG2odEI=; b=DSLU7V6+JehogzYGVI/uK8AHbU9bunaZeJHdItQpG6ZCKldpLgwMXflJCFJcoFcEYy ZC7aXuy6MTdrMy9VKz6gqdswlcxoynVaEHbsBTpPi4FZebR+3A7av63vfvjzAAanJffK 0hKUBhJmz0jv95ODg3jU077XhlUIe9moXIiD8YUl6vvS64WnfMe4pBpngtuFj9KulB5L lw316uxr3pHbjDHGzGrHS9dCfnTxgeTb7az1hL2RqEQTYj7dY3OHv/ahNlkrqRd4c2f3 BdLxUwkEs5J97ka4a+XxRo1EH9gBu1CjQwvMEVHyeRb1ZpdSg3+AU0CpKTY0LAU6teTC jgHg== 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=SNJVaB+s7ZA11pYXdqQ6GcpK3Mhuq0zk8K56zG2odEI=; b=VXtXqYlh1altVpOz7iFm/K7hU81FN9AHTuruhdyobMIaQ3akSnMTbqejXjMLT0dYDr Hx9/oDTITyhb+wTDd25cxHVCNT12RdQe/LAA7JxupwCQiOMJuI44mAf2pVaVj1bGCaCy rGjA54cqUJJi5nj2eE8wwJu+BOrx+iPlLUJy06zo0LZjee/n3qPsr3y2UpDh9r6G0Kyq m21egBHSq4z9k0dQk1zgv3W3V2lV3oE4xMlM6/aEKSwdXbYaaeRaHxlvBcoSJvU1B4lw 6n5EbpjKomFgUhP60HHWzZx83uHMaxk3lWLRKCAL4c18blMKeQtXcv1wa0g8eki00jns Up9g== X-Gm-Message-State: AGi0PuaRqqXlrC4dpJitZofXA882OJRLeCMJBNYZZXYW/44CzUORIsNf nvInkzYu20i30TeKz+irVrDbs5uSAmQ= X-Google-Smtp-Source: APiQypICOqQ7eUQx3mGhOSzVN5IlsJzita/lrjRiNqbyo9xSPJSwCQiKeFC6SwfBNmqtdJvLctuJa07osPw= X-Received: by 2002:a17:90a:2226:: with SMTP id c35mr3112046pje.2.1586318252734; Tue, 07 Apr 2020 20:57:32 -0700 (PDT) Date: Tue, 7 Apr 2020 20:56:53 -0700 In-Reply-To: <20200408035654.247908-1-satyat@google.com> Message-Id: <20200408035654.247908-12-satyat@google.com> Mime-Version: 1.0 References: <20200408035654.247908-1-satyat@google.com> X-Mailer: git-send-email 2.26.0.110.g2183baf09c-goog Subject: [PATCH v10 11/12] f2fs: add inline encryption support 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, linux-ext4@vger.kernel.org Cc: Barani Muthukumaran , Kuohong Wang , Kim Boojin , Satya Tangirala , Eric Biggers Sender: linux-fscrypt-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org Wire up f2fs to support inline encryption via the helper functions which fs/crypto/ now provides. This includes: - Adding a mount option 'inlinecrypt' which enables inline encryption on encrypted files where it can be used. - Setting the bio_crypt_ctx on bios that will be submitted to an inline-encrypted file. - Not adding logically discontiguous data to bios that will be submitted to an inline-encrypted file. - Not doing filesystem-layer crypto on inline-encrypted files. Co-developed-by: Eric Biggers Signed-off-by: Eric Biggers Signed-off-by: Satya Tangirala --- Documentation/filesystems/f2fs.rst | 7 ++- fs/f2fs/compress.c | 2 +- fs/f2fs/data.c | 68 +++++++++++++++++++++++++----- fs/f2fs/super.c | 32 ++++++++++++++ 4 files changed, 97 insertions(+), 12 deletions(-) diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst index 87d794bc75a47..e0e0353f8a498 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -254,7 +254,12 @@ compress_extension=%s Support adding specified extension, so that f2fs can enab on compression extension list and enable compression on these file by default rather than to enable it via ioctl. For other files, we can still enable compression via ioctl. -====================== ============================================================ +inlinecrypt + Encrypt/decrypt the contents of encrypted files using the + blk-crypto framework rather than filesystem-layer encryption. + This allows the use of inline encryption hardware. The on-disk + format is unaffected. For more details, see + Documentation/block/inline-encryption.rst. Debugfs Entries =============== diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index df7b2d15eacde..a19c093711a68 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -975,7 +975,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc, .submitted = false, .io_type = io_type, .io_wbc = wbc, - .encrypted = f2fs_encrypted_file(cc->inode), + .encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode), }; struct dnode_of_data dn; struct node_info ni; diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index cdf2f626bea7a..0dfa8d3361428 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -457,6 +458,33 @@ static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages) return bio; } +static void f2fs_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode, + pgoff_t first_idx, + const struct f2fs_io_info *fio, + gfp_t gfp_mask) +{ + /* + * The f2fs garbage collector sets ->encrypted_page when it wants to + * read/write raw data without encryption. + */ + if (!fio || !fio->encrypted_page) + fscrypt_set_bio_crypt_ctx(bio, inode, first_idx, gfp_mask); +} + +static bool f2fs_crypt_mergeable_bio(struct bio *bio, const struct inode *inode, + pgoff_t next_idx, + const struct f2fs_io_info *fio) +{ + /* + * The f2fs garbage collector sets ->encrypted_page when it wants to + * read/write raw data without encryption. + */ + if (fio && fio->encrypted_page) + return !bio_has_crypt_ctx(bio); + + return fscrypt_mergeable_bio(bio, inode, next_idx); +} + static inline void __submit_bio(struct f2fs_sb_info *sbi, struct bio *bio, enum page_type type) { @@ -653,6 +681,9 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio) /* Allocate a new bio */ bio = __bio_alloc(fio, 1); + f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host, + fio->page->index, fio, GFP_NOIO); + if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { bio_put(bio); return -EFAULT; @@ -841,12 +872,16 @@ int f2fs_merge_page_bio(struct f2fs_io_info *fio) trace_f2fs_submit_page_bio(page, fio); f2fs_trace_ios(fio, 0); - if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block, - fio->new_blkaddr)) + if (bio && (!page_is_mergeable(fio->sbi, bio, *fio->last_block, + fio->new_blkaddr) || + !f2fs_crypt_mergeable_bio(bio, fio->page->mapping->host, + fio->page->index, fio))) f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL); alloc_new: if (!bio) { bio = __bio_alloc(fio, BIO_MAX_PAGES); + f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host, + fio->page->index, fio, GFP_NOIO); bio_set_op_attrs(bio, fio->op, fio->op_flags); add_bio_entry(fio->sbi, bio, page, fio->temp); @@ -903,8 +938,11 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio) inc_page_count(sbi, WB_DATA_TYPE(bio_page)); - if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio, - io->last_block_in_bio, fio->new_blkaddr)) + if (io->bio && + (!io_is_mergeable(sbi, io->bio, io, fio, io->last_block_in_bio, + fio->new_blkaddr) || + !f2fs_crypt_mergeable_bio(io->bio, fio->page->mapping->host, + fio->page->index, fio))) __submit_merged_bio(io); alloc_new: if (io->bio == NULL) { @@ -916,6 +954,8 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio) goto skip; } io->bio = __bio_alloc(fio, BIO_MAX_PAGES); + f2fs_set_bio_crypt_ctx(io->bio, fio->page->mapping->host, + fio->page->index, fio, GFP_NOIO); io->fio = *fio; } @@ -960,11 +1000,14 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr, for_write); if (!bio) return ERR_PTR(-ENOMEM); + + f2fs_set_bio_crypt_ctx(bio, inode, first_idx, NULL, GFP_NOFS); + f2fs_target_device(sbi, blkaddr, bio); bio->bi_end_io = f2fs_read_end_io; bio_set_op_attrs(bio, REQ_OP_READ, op_flag); - if (f2fs_encrypted_file(inode)) + if (fscrypt_inode_uses_fs_layer_crypto(inode)) post_read_steps |= 1 << STEP_DECRYPT; if (f2fs_compressed_file(inode)) post_read_steps |= 1 << STEP_DECOMPRESS; @@ -1988,8 +2031,9 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page, * This page will go to BIO. Do we need to send this * BIO off first? */ - if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio, - *last_block_in_bio, block_nr)) { + if (bio && (!page_is_mergeable(F2FS_I_SB(inode), bio, + *last_block_in_bio, block_nr) || + !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) { submit_and_realloc: __submit_bio(F2FS_I_SB(inode), bio, DATA); bio = NULL; @@ -2117,8 +2161,9 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret, blkaddr = data_blkaddr(dn.inode, dn.node_page, dn.ofs_in_node + i + 1); - if (bio && !page_is_mergeable(sbi, bio, - *last_block_in_bio, blkaddr)) { + if (bio && (!page_is_mergeable(sbi, bio, + *last_block_in_bio, blkaddr) || + !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) { submit_and_realloc: __submit_bio(sbi, bio, DATA); bio = NULL; @@ -2337,6 +2382,9 @@ int f2fs_encrypt_one_page(struct f2fs_io_info *fio) /* wait for GCed page writeback via META_MAPPING */ f2fs_wait_on_block_writeback(inode, fio->old_blkaddr); + if (fscrypt_inode_uses_inline_crypto(inode)) + return 0; + retry_encrypt: fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page, PAGE_SIZE, 0, gfp_flags); @@ -2510,7 +2558,7 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio) f2fs_unlock_op(fio->sbi); err = f2fs_inplace_write_data(fio); if (err) { - if (f2fs_encrypted_file(inode)) + if (fscrypt_inode_uses_fs_layer_crypto(inode)) fscrypt_finalize_bounce_page(&fio->encrypted_page); if (PageWriteback(page)) end_page_writeback(page); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index f2dfc21c6abb0..8ccda50f28888 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -138,6 +138,7 @@ enum { Opt_alloc, Opt_fsync, Opt_test_dummy_encryption, + Opt_inlinecrypt, Opt_checkpoint_disable, Opt_checkpoint_disable_cap, Opt_checkpoint_disable_cap_perc, @@ -203,6 +204,7 @@ static match_table_t f2fs_tokens = { {Opt_alloc, "alloc_mode=%s"}, {Opt_fsync, "fsync_mode=%s"}, {Opt_test_dummy_encryption, "test_dummy_encryption"}, + {Opt_inlinecrypt, "inlinecrypt"}, {Opt_checkpoint_disable, "checkpoint=disable"}, {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"}, {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"}, @@ -788,6 +790,13 @@ static int parse_options(struct super_block *sb, char *options) f2fs_info(sbi, "Test dummy encryption mode enabled"); #else f2fs_info(sbi, "Test dummy encryption mount option ignored"); +#endif + break; + case Opt_inlinecrypt: +#ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT + sb->s_flags |= SB_INLINECRYPT; +#else + f2fs_info(sbi, "inline encryption not supported"); #endif break; case Opt_checkpoint_disable_cap_perc: @@ -1583,6 +1592,8 @@ static void default_options(struct f2fs_sb_info *sbi) F2FS_OPTION(sbi).compress_ext_cnt = 0; F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON; + sbi->sb->s_flags &= ~SB_INLINECRYPT; + set_opt(sbi, INLINE_XATTR); set_opt(sbi, INLINE_DATA); set_opt(sbi, INLINE_DENTRY); @@ -2427,6 +2438,25 @@ static void f2fs_get_ino_and_lblk_bits(struct super_block *sb, *lblk_bits_ret = 8 * sizeof(block_t); } +static int f2fs_get_num_devices(struct super_block *sb) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + + if (f2fs_is_multi_device(sbi)) + return sbi->s_ndevs; + return 1; +} + +static void f2fs_get_devices(struct super_block *sb, + struct request_queue **devs) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int i; + + for (i = 0; i < sbi->s_ndevs; i++) + devs[i] = bdev_get_queue(FDEV(i).bdev); +} + static const struct fscrypt_operations f2fs_cryptops = { .key_prefix = "f2fs:", .get_context = f2fs_get_context, @@ -2436,6 +2466,8 @@ static const struct fscrypt_operations f2fs_cryptops = { .max_namelen = F2FS_NAME_LEN, .has_stable_inodes = f2fs_has_stable_inodes, .get_ino_and_lblk_bits = f2fs_get_ino_and_lblk_bits, + .get_num_devices = f2fs_get_num_devices, + .get_devices = f2fs_get_devices, }; #endif