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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 BEB89C48BDF for ; Thu, 24 Jun 2021 11:15:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA4E4600CC for ; Thu, 24 Jun 2021 11:15:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232438AbhFXLRf (ORCPT ); Thu, 24 Jun 2021 07:17:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56248 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232421AbhFXLRb (ORCPT ); Thu, 24 Jun 2021 07:17:31 -0400 Received: from mail-lf1-x132.google.com (mail-lf1-x132.google.com [IPv6:2a00:1450:4864:20::132]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F3EAC061574; Thu, 24 Jun 2021 04:15:12 -0700 (PDT) Received: by mail-lf1-x132.google.com with SMTP id d16so9615011lfn.3; Thu, 24 Jun 2021 04:15:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=L2KbzsLRkfXUNVSPy7TFTX4HqFkjy2iFgmcesZmodrg=; b=BSGo4b7VCQS1gF53MLnCET69aQIZx2s3Pw33dnaeODLCV63de/FDNU7zavQgHvO+5v hEdq9PbHtSknuEQMI/8AYjPcY81bUMkDiG4B2MQb30ETS3uDK3XgUdVBytuQDdAwhFf6 59ydi3e9d6Zt4soPiQ1fyrDVIDZL8Au7fFkwtNxHlVJAq3P/jyfGGybQXm9ladnWUPFq v10DWKn8Ldm09D0L/LcsuYjvOlsH+rBPKWsZ2FVfbq37hVCmFwm9Y5GvgC/6k+KIOgoF IUGGzNHHFSQj+MZpx0o9pE1cnW5NRWxh7O2TBLUJjfn48/QOdGk8DUoqlFkk6QK4ruI5 57Ew== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=L2KbzsLRkfXUNVSPy7TFTX4HqFkjy2iFgmcesZmodrg=; b=SGNun0SbG7OnCF5Ax9slR/t7dZUcGCa3CQ1fdyUP+It0aiIKF4798FR+yDMhkx2PIQ 90/IUM9Nsv3SCgurqnZM0NmSAe5X8tqsu3b1OXQRSdzALR7NMvuSBX7G7I4JC5FP/spV qQ+r3LrQnh+9cM5rEPqNsuo8F2dCMyipiwjV/uAfvqgOCcvV+VUQOrmwiBS4nIUSRnV4 UPHxewEs7BV11IXXLL1R53yHD3JFpPTgLNYmSbjwakdTrezrv6lfmhq58WMb83Dh0DXN lsQlHkO3cP85zscnokeRzwc6ubhOsKyWRRI3S6jHO+IKh/0QHcQ1FDhLPZYJtBMcjZTB h/zg== X-Gm-Message-State: AOAM532tJKxIpFZXdycez0J3fdp5cDWQosUpxN6MiBfYH7clsEHbKuUq Vc+nEM5Jw995qBtdrn2cFWw= X-Google-Smtp-Source: ABdhPJxrjV8b5v3JrHUurMP5IS4mnUdZN3dELmfIr2Xm31ltf7lYeL7ggZMu1SUHkEJHjgjA1cBFHw== X-Received: by 2002:a05:6512:169f:: with SMTP id bu31mr3484958lfb.486.1624533311049; Thu, 24 Jun 2021 04:15:11 -0700 (PDT) Received: from carbon.v ([94.143.149.146]) by smtp.googlemail.com with ESMTPSA id q21sm195293lfp.233.2021.06.24.04.15.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Jun 2021 04:15:10 -0700 (PDT) From: Dmitry Kadashev To: Jens Axboe , Alexander Viro , Christian Brauner Cc: Pavel Begunkov , linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, Dmitry Kadashev Subject: [PATCH v6 4/9] fs: make do_symlinkat() take struct filename Date: Thu, 24 Jun 2021 18:14:47 +0700 Message-Id: <20210624111452.658342-5-dkadashev@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210624111452.658342-1-dkadashev@gmail.com> References: <20210624111452.658342-1-dkadashev@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Pass in the struct filename pointers instead of the user string, for uniformity with the recently converted do_mkdnodat(), do_unlinkat(), do_renameat(), do_mkdirat(). Cc: Al Viro Cc: Christian Brauner Link: https://lore.kernel.org/io-uring/20210330071700.kpjoyp5zlni7uejm@wittgenstein/ Signed-off-by: Dmitry Kadashev Acked-by: Christian Brauner --- fs/namei.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index 9fc981e28788..76572d703e82 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -4189,23 +4189,23 @@ int vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, } EXPORT_SYMBOL(vfs_symlink); -static long do_symlinkat(const char __user *oldname, int newdfd, - const char __user *newname) +static long do_symlinkat(struct filename *from, int newdfd, + struct filename *to) { int error; - struct filename *from; struct dentry *dentry; struct path path; unsigned int lookup_flags = 0; - from = getname(oldname); - if (IS_ERR(from)) - return PTR_ERR(from); + if (IS_ERR(from)) { + error = PTR_ERR(from); + goto out_putboth; + } retry: - dentry = user_path_create(newdfd, newname, &path, lookup_flags); + dentry = __filename_create(newdfd, to, &path, lookup_flags); error = PTR_ERR(dentry); if (IS_ERR(dentry)) - goto out_putname; + goto out_putfrom; error = security_path_symlink(&path, dentry, from->name); if (!error) { @@ -4220,20 +4220,24 @@ static long do_symlinkat(const char __user *oldname, int newdfd, lookup_flags |= LOOKUP_REVAL; goto retry; } -out_putname: - putname(from); +out_putboth: + if (!IS_ERR(to)) + putname(to); +out_putfrom: + if (!IS_ERR(from)) + putname(from); return error; } SYSCALL_DEFINE3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname) { - return do_symlinkat(oldname, newdfd, newname); + return do_symlinkat(getname(oldname), newdfd, getname(newname)); } SYSCALL_DEFINE2(symlink, const char __user *, oldname, const char __user *, newname) { - return do_symlinkat(oldname, AT_FDCWD, newname); + return do_symlinkat(getname(oldname), AT_FDCWD, getname(newname)); } /** -- 2.30.2