From mboxrd@z Thu Jan 1 00:00:00 1970 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=-14.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 BCC1EC43461 for ; Sun, 13 Sep 2020 08:39:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8DF56207C3 for ; Sun, 13 Sep 2020 08:39:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599986366; bh=b+br3C3cbfnBLBIC6l48f9MznNCXZDVFxP9oBuV6fkI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=a3LDWMrPLGWHOUpi88BgFlKbdzSx8PcLwn5NgSYOXZ0cR3dzl+oTLpbiQd1NZ8xxv weaoT6RnYHjFghImTwJBdBw97Hn6fG+fdp2soNXewlj7xGh/Cqrpont6Ci3bQ57f5I xWgWuTNzjfTiSJZtrwerEWvD+7EY2tfjNSqFeahk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726043AbgIMIjW (ORCPT ); Sun, 13 Sep 2020 04:39:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:60762 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725899AbgIMIiA (ORCPT ); Sun, 13 Sep 2020 04:38:00 -0400 Received: from sol.attlocal.net (172-10-235-113.lightspeed.sntcca.sbcglobal.net [172.10.235.113]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 863D6217BA; Sun, 13 Sep 2020 08:37:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599986278; bh=b+br3C3cbfnBLBIC6l48f9MznNCXZDVFxP9oBuV6fkI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VGul2KB3CInYTSSC4L2PRp6JTaRYcFNP0nidlDNYYfkMYlIOTEaZob7V4VtNrIGWm AL/Oi/ir5g2CXybFFSNqBguAQ9/tmP5RJyHzacP8pFF/S1Y/Chg87Lm7X6Oje3vh0B +OcZ8AHS3KZSm/Zul/lrrcPWKAWpE1oq0ZaXR1zw= From: Eric Biggers To: linux-fscrypt@vger.kernel.org Cc: linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, ceph-devel@vger.kernel.org, Jeff Layton , Daniel Rosenberg Subject: [PATCH v2 03/11] ext4: use fscrypt_prepare_new_inode() and fscrypt_set_context() Date: Sun, 13 Sep 2020 01:36:12 -0700 Message-Id: <20200913083620.170627-4-ebiggers@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200913083620.170627-1-ebiggers@kernel.org> References: <20200913083620.170627-1-ebiggers@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org From: Eric Biggers Convert ext4 to use the new functions fscrypt_prepare_new_inode() and fscrypt_set_context(). This avoids calling fscrypt_get_encryption_info() from within a transaction, which can deadlock because fscrypt_get_encryption_info() isn't GFP_NOFS-safe. For more details about this problem, see the earlier patch "fscrypt: add fscrypt_prepare_new_inode() and fscrypt_set_context()". Signed-off-by: Eric Biggers --- fs/ext4/ialloc.c | 37 +++++++++++++++++-------------------- 1 file changed, 17 insertions(+), 20 deletions(-) diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 0cc576005a923..698ca4a4db5f7 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -819,7 +819,7 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, ext4_group_t i; ext4_group_t flex_group; struct ext4_group_info *grp; - int encrypt = 0; + bool encrypt = false; /* Cannot create files in a deleted directory */ if (!dir || !dir->i_nlink) @@ -831,24 +831,6 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, if (unlikely(ext4_forced_shutdown(sbi))) return ERR_PTR(-EIO); - if ((IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) && - (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) && - !(i_flags & EXT4_EA_INODE_FL)) { - err = fscrypt_get_encryption_info(dir); - if (err) - return ERR_PTR(err); - if (!fscrypt_has_encryption_key(dir)) - return ERR_PTR(-ENOKEY); - encrypt = 1; - } - - if (!handle && sbi->s_journal && !(i_flags & EXT4_EA_INODE_FL)) { - ret2 = ext4_xattr_credits_for_new_inode(dir, mode, encrypt); - if (ret2 < 0) - return ERR_PTR(ret2); - nblocks += ret2; - } - ngroups = ext4_get_groups_count(sb); trace_ext4_request_inode(dir, mode); inode = new_inode(sb); @@ -878,10 +860,25 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, else ei->i_projid = make_kprojid(&init_user_ns, EXT4_DEF_PROJID); + if (!(i_flags & EXT4_EA_INODE_FL)) { + err = fscrypt_prepare_new_inode(dir, inode, &encrypt); + if (err) + goto out; + } + err = dquot_initialize(inode); if (err) goto out; + if (!handle && sbi->s_journal && !(i_flags & EXT4_EA_INODE_FL)) { + ret2 = ext4_xattr_credits_for_new_inode(dir, mode, encrypt); + if (ret2 < 0) { + err = ret2; + goto out; + } + nblocks += ret2; + } + if (!goal) goal = sbi->s_inode_goal; @@ -1174,7 +1171,7 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, * prevent its deduplication. */ if (encrypt) { - err = fscrypt_inherit_context(dir, inode, handle, true); + err = fscrypt_set_context(inode, handle); if (err) goto fail_free_drop; } -- 2.28.0