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[76.182.20.124]) by smtp.gmail.com with ESMTPSA id y17-20020a056902053100b00dc2217892a4sm2848565ybs.56.2024.01.24.09.20.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jan 2024 09:20:09 -0800 (PST) From: Josef Bacik To: linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v5 49/52] btrfs: support encryption with log replay Date: Wed, 24 Jan 2024 12:19:11 -0500 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Log replay needs a few tweaks in order to make sure everything works with encryption. 1. Use the size of the item itself, not the size of the item object when we're replaying an extent. 2. Copy in the fscrypt context if we find one in the log. 3. Set NEEDS_FULL_SYNC when we update the inode context so all of the items are copied into the log at fsync time. This makes replay of encrypted files work properly. Signed-off-by: Josef Bacik --- fs/btrfs/fscrypt.c | 1 + fs/btrfs/tree-log.c | 10 +++++++--- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/fscrypt.c b/fs/btrfs/fscrypt.c index 83fa99a5be6e..b24591af3410 100644 --- a/fs/btrfs/fscrypt.c +++ b/fs/btrfs/fscrypt.c @@ -147,6 +147,7 @@ static int btrfs_fscrypt_set_context(struct inode *inode, const void *ctx, goto out_err; } + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(inode)->runtime_flags); leaf = path->nodes[0]; ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 6fc16612b9b8..42c2b90515be 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -715,6 +715,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, if (found_type == BTRFS_FILE_EXTENT_REG || found_type == BTRFS_FILE_EXTENT_PREALLOC) { u64 offset; + u32 item_size; unsigned long dest_offset; struct btrfs_key ins; @@ -722,14 +723,16 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, btrfs_fs_incompat(fs_info, NO_HOLES)) goto update_inode; + item_size = btrfs_item_size(eb, slot); + ret = btrfs_insert_empty_item(trans, root, path, key, - sizeof(*item)); + item_size); if (ret) goto out; dest_offset = btrfs_item_ptr_offset(path->nodes[0], path->slots[0]); copy_extent_buffer(path->nodes[0], eb, dest_offset, - (unsigned long)item, sizeof(*item)); + (unsigned long)item, item_size); ins.objectid = btrfs_file_extent_disk_bytenr(eb, item); ins.offset = btrfs_file_extent_disk_num_bytes(eb, item); @@ -2511,7 +2514,8 @@ static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb, continue; /* these keys are simply copied */ - if (key.type == BTRFS_XATTR_ITEM_KEY) { + if (key.type == BTRFS_XATTR_ITEM_KEY || + key.type == BTRFS_FSCRYPT_INODE_CTX_ITEM_KEY) { ret = overwrite_item(wc->trans, root, path, eb, i, &key); if (ret) -- 2.43.0