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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=LUW76wulPtAQJ8tF39qY7tplldIIDt/m1N3Ol2sQlm4=; b=Xi28I7/Gio9UQCzuLwsjtkF/QkpXtGZZh3c2LeEFP/syQvEO2OD1+LuOvKlfm1lOXq L4e2KeaBzXUFhl9Vve3xlOhHExtygZeyPfSlAtB8E8Wofo8jZWPn8oMl3TRYHAoQ+5wm 0Qo2fTftFahh/TPHKc9bvlxOEe5lYTzI6XvhVgM+m7WDjo3UR9E6oKJPBdc4dcGOCh8B qgmULIqnXwFUzPR9oZtu4odiOH6WerfGZIH0DROoZzXErsP4nB6wMyz2StjrDbl04heZ yZppz6vfJR+ZWIiKc4HxsyvAPydDW0UV8Nseyi2BZfXHU7QizMB++PuS0vraYRHUyvJk 8d3Q== X-Gm-Message-State: APjAAAXTSL0jGIz7JWoTeWy7lNNV0QytwZ1U/x7UYgQyiY0SKlO7e7HF eX7cdB6W0DqrFUw6FH7yWsZ1IB2u4pA= X-Google-Smtp-Source: APXvYqw32IMJ529CC2GTWHf+cGlz2NO953GXJ0xYwvrMmv68MViep9809UYsLy0nOxUjV4tCHruZKCd7v/U= X-Received: by 2002:a63:6981:: with SMTP id e123mr773006pgc.136.1562799405213; Wed, 10 Jul 2019 15:56:45 -0700 (PDT) Date: Wed, 10 Jul 2019 15:56:09 -0700 In-Reply-To: <20190710225609.192252-1-satyat@google.com> Message-Id: <20190710225609.192252-9-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 8/8] f2fs: Wire up f2fs to use inline encryption via fscrypt 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-fscrypt-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Satya Tangirala --- fs/f2fs/data.c | 83 +++++++++++++++++++++++++++++++++++++++++++++---- fs/f2fs/super.c | 13 ++++---- 2 files changed, 84 insertions(+), 12 deletions(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index eda4181d2092..6fa947725fc2 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -142,6 +142,8 @@ static bool f2fs_bio_post_read_required(struct bio *bio) static void f2fs_read_end_io(struct bio *bio) { + fscrypt_unset_bio_crypt_ctx(bio); + if (time_to_inject(F2FS_P_SB(bio_first_page_all(bio)), FAULT_READ_IO)) { f2fs_show_injection_info(FAULT_READ_IO); @@ -165,6 +167,8 @@ static void f2fs_write_end_io(struct bio *bio) struct bio_vec *bvec; struct bvec_iter_all iter_all; + fscrypt_unset_bio_crypt_ctx(bio); + if (time_to_inject(sbi, FAULT_WRITE_IO)) { f2fs_show_injection_info(FAULT_WRITE_IO); bio->bi_status = BLK_STS_IOERR; @@ -282,9 +286,18 @@ static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, return bio; } +static inline u64 inline_crypt_dun(struct inode *inode, pgoff_t offset) +{ + return (((u64)inode->i_ino) << 32) | lower_32_bits(offset); +} + static inline void __submit_bio(struct f2fs_sb_info *sbi, struct bio *bio, enum page_type type) { + struct page *page; + struct inode *inode; + int err = 0; + if (!is_read_io(bio_op(bio))) { unsigned int start; @@ -326,7 +339,22 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi, trace_f2fs_submit_read_bio(sbi->sb, type, bio); else trace_f2fs_submit_write_bio(sbi->sb, type, bio); - submit_bio(bio); + + if (bio_has_data(bio)) { + page = bio_page(bio); + if (page && page->mapping && page->mapping->host) { + inode = page->mapping->host; + err = fscrypt_set_bio_crypt_ctx(inode, bio, + inline_crypt_dun(inode, + page->index)); + } + } + if (err) { + bio->bi_status = BLK_STS_IOERR; + bio_endio(bio); + } else { + submit_bio(bio); + } } static void __submit_merged_bio(struct f2fs_bio_info *io) @@ -487,6 +515,9 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio) enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp; struct page *bio_page; + struct inode *fio_inode, *bio_inode; + struct page *first_page; + u64 next_dun = 0; f2fs_bug_on(sbi, is_read_io(fio->op)); @@ -513,10 +544,28 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio) inc_page_count(sbi, WB_DATA_TYPE(bio_page)); + fio_inode = fio->page->mapping->host; + bio_inode = NULL; + first_page = NULL; + next_dun = 0; + if (io->bio && bio_page(io->bio)->mapping) { + first_page = bio_page(io->bio); + bio_inode = first_page->mapping->host; + if (fscrypt_inode_is_inline_crypted(bio_inode)) { + next_dun = inline_crypt_dun(bio_inode, + first_page->index) + + (io->bio->bi_iter.bi_size >> PAGE_SHIFT); + } + } if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) || - !__same_bdev(sbi, fio->new_blkaddr, io->bio))) + !__same_bdev(sbi, fio->new_blkaddr, io->bio) || + !fscrypt_inode_crypt_mergeable(bio_inode, fio_inode) || + (fscrypt_inode_is_inline_crypted(bio_inode) && + next_dun != inline_crypt_dun(fio_inode, + fio->page->index)))) __submit_merged_bio(io); + alloc_new: if (io->bio == NULL) { if ((fio->type == DATA || fio->type == NODE) && @@ -568,8 +617,9 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr, 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_needs_fs_layer_crypto(inode)) post_read_steps |= 1 << STEP_DECRYPT; + if (post_read_steps) { ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS); if (!ctx) { @@ -1519,6 +1569,7 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page, struct f2fs_map_blocks *map, struct bio **bio_ret, sector_t *last_block_in_bio, + u64 *next_dun, bool is_readahead) { struct bio *bio = *bio_ret; @@ -1592,6 +1643,13 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page, __submit_bio(F2FS_I_SB(inode), bio, DATA); bio = NULL; } + + if (bio && fscrypt_inode_is_inline_crypted(inode) && + *next_dun != inline_crypt_dun(inode, page->index)) { + __submit_bio(F2FS_I_SB(inode), bio, DATA); + bio = NULL; + } + if (bio == NULL) { bio = f2fs_grab_read_bio(inode, block_nr, nr_pages, is_readahead ? REQ_RAHEAD : 0); @@ -1611,6 +1669,9 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page, if (bio_add_page(bio, page, blocksize, 0) < blocksize) goto submit_and_realloc; + if (fscrypt_inode_is_inline_crypted(inode)) + *next_dun = inline_crypt_dun(inode, page->index) + 1; + inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA); ClearPageError(page); *last_block_in_bio = block_nr; @@ -1644,6 +1705,7 @@ static int f2fs_mpage_readpages(struct address_space *mapping, struct inode *inode = mapping->host; struct f2fs_map_blocks map; int ret = 0; + u64 next_dun = 0; map.m_pblk = 0; map.m_lblk = 0; @@ -1667,7 +1729,8 @@ static int f2fs_mpage_readpages(struct address_space *mapping, } ret = f2fs_read_single_page(inode, page, nr_pages, &map, &bio, - &last_block_in_bio, is_readahead); + &last_block_in_bio, &next_dun, + is_readahead); if (ret) { SetPageError(page); zero_user_segment(page, 0, PAGE_SIZE); @@ -1720,7 +1783,7 @@ static int encrypt_one_page(struct f2fs_io_info *fio) struct page *mpage; gfp_t gfp_flags = GFP_NOFS; - if (!f2fs_encrypted_file(inode)) + if (!fscrypt_needs_fs_layer_crypto(inode)) return 0; /* wait for GCed page writeback via META_MAPPING */ @@ -1899,7 +1962,7 @@ 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_needs_fs_layer_crypto(inode)) fscrypt_pullback_bio_page(&fio->encrypted_page, true); if (PageWriteback(page)) @@ -2617,6 +2680,8 @@ static void f2fs_dio_end_io(struct bio *bio) { struct f2fs_private_dio *dio = bio->bi_private; + fscrypt_unset_bio_crypt_ctx(bio); + dec_page_count(F2FS_I_SB(dio->inode), dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ); @@ -2633,12 +2698,18 @@ static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode, { struct f2fs_private_dio *dio; bool write = (bio_op(bio) == REQ_OP_WRITE); + u64 data_unit_num = inline_crypt_dun(inode, file_offset >> PAGE_SHIFT); dio = f2fs_kzalloc(F2FS_I_SB(inode), sizeof(struct f2fs_private_dio), GFP_NOFS); if (!dio) goto out; + if (fscrypt_set_bio_crypt_ctx(inode, bio, data_unit_num) != 0) { + kvfree(dio); + goto out; + } + dio->inode = inode; dio->orig_end_io = bio->bi_end_io; dio->orig_private = bio->bi_private; diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 6b959bbb336a..2a7b3bae98aa 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2223,12 +2223,13 @@ static bool f2fs_dummy_context(struct inode *inode) } static const struct fscrypt_operations f2fs_cryptops = { - .key_prefix = "f2fs:", - .get_context = f2fs_get_context, - .set_context = f2fs_set_context, - .dummy_context = f2fs_dummy_context, - .empty_dir = f2fs_empty_dir, - .max_namelen = F2FS_NAME_LEN, + .key_prefix = "f2fs:", + .get_context = f2fs_get_context, + .set_context = f2fs_set_context, + .dummy_context = f2fs_dummy_context, + .empty_dir = f2fs_empty_dir, + .max_namelen = F2FS_NAME_LEN, + .inline_crypt_supp = true, }; #endif