From nobody Mon Nov 25 23:17:49 2024 Received: from mail-pj1-f41.google.com (mail-pj1-f41.google.com [209.85.216.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD7BE18CC17; Fri, 25 Oct 2024 03:46:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729827978; cv=none; b=g8Hz/v1e4SGo3XAC6MLVp4Mux/URVqTHLxMk1enIc3HsfR4YK/y63HePpgMXm4+ZADs8FMGRlOg3XBKA9z1FwpgYzhPeisSqTwRAjqzWPseDq9HuIiZBb+dn0UgvmgOkT46YIGX1edwzekPxGZug4/hIPZQkPs1U5PtrmieyHi4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729827978; c=relaxed/simple; bh=XyQDkox2MNNQIUWJcrRwxKGQOX+v3b2r2qve2e5EU6U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UCbnx7D2ConmhHxCFrKjXFM72gr5JGnsPBbc+qh+YP53i0yBKIBHOjyg2OmABQWb55xsGInBg3PfUsOFd4BsZqO9j/RkKxY/Bdj2oyc85wN/WqCk+rrElTcku5Iha4q5w2MkB05m24FVARU6lZb7LzTtyVhiJQfrFbyLxE/S0j8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=jko3EvRd; arc=none smtp.client-ip=209.85.216.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jko3EvRd" Received: by mail-pj1-f41.google.com with SMTP id 98e67ed59e1d1-2e2e8c8915eso1189008a91.3; Thu, 24 Oct 2024 20:46:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729827975; x=1730432775; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=yVU94oDYUdmKWru5SiVzYI7iG6i76KSCiLJO+AKPsq0=; b=jko3EvRduHL2C9f9pE3rNgVyahVW9GuPpmBChuK9GPNxKSSVfjZtfIY67H+YzK5r/S nO0ZS6+rcBUris4vcPNEeezJJgz9ejQySwG791+Is6kG4tSEM1SC2DacWMewom6C7Gzs +8aYKa7MymeKRStr5BDSl0aVmLQf9gjquo0K7EuytiANlRLiLMl2iCdxzFwewS9I6QmA Ein9nFuPNeHEBnfGcOppmeyUxHVbqWgfZUimT3zgaRFm2Rs3A8WhGAjifroXIGWDGaxA DfjGTg9SAv2wnOhD4gk3QNvA3IQMiau6P/GavfC8wC2dzA4Htukefc7aOuK+WUmRYBHZ C1cg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729827975; x=1730432775; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=yVU94oDYUdmKWru5SiVzYI7iG6i76KSCiLJO+AKPsq0=; b=AFnHL4pPT5SntghcKPR+NGFG5SLFI22DqFt/+/EkMny+urJ3jLOAzxUslNjGOVJtsc 600UIqipqg/9C7nDYUTbOhSWOFT68BEtA0JN5pUiKONoFEfXPshWD3ROemPQnHjytfZY j3xpwCXFCaSblF7DT2FJPcwA2snaafqFuDOp9qyLS4Ig91tM0Rk9OF59RvSsyS/8MryW tj+xVyZIJZeBDt2KsT1/c1d2jeacVhaJNf3KI37quH5/MedhgnhOdUdzjHrWjObPMSvs ZYA5+CpE6YRb3cgraI881VokaKt8tOJ6KBhUNfDA7coENuu9MMNvK+x9TVlZaZy08tTN NEzg== X-Forwarded-Encrypted: i=1; AJvYcCVBCHQHx1yITAdnOzo6uB/+gVq2NFKmtFnEgQdbz04X68fVy1NGu+REDaKRDMQDm9F+j8CgI6ivKbk11Mhc@vger.kernel.org, AJvYcCW6C8T+o7sPwhIaomM+5NVwb5dhkcFABCi+HiPp20GanrNGhZYExweKG9luyJgpFrmgGveWU9jrA0PsK1hw@vger.kernel.org, AJvYcCWjvKJZeMZdBBvnmn0FWMwjNLq5c3mf1vwymn2FrdDo8hzxj0CBBxT2+IWKoMWFf0tOr4mKuPKNayPm@vger.kernel.org X-Gm-Message-State: AOJu0YzbD7mlkjTDHTBTr+lVpMn8Lhh5dno452/ZQH4Z8/8ZH/2069+u QhwhudEXtHZJTnkui6Fa1MuR+/lFQFLoVl97W8wISFcnLuqJz8YxDy80CQ== X-Google-Smtp-Source: AGHT+IGqOWaUl4lVz3uchUPFtaT+KvqbvQ9YtJGxEE2y8Thqyp7fXT75Mw97YNUWj0FXvt/BEpbLdA== X-Received: by 2002:a17:90a:a597:b0:2e2:ef25:ed35 with SMTP id 98e67ed59e1d1-2e76b1f9cc9mr9194949a91.0.1729827975078; Thu, 24 Oct 2024 20:46:15 -0700 (PDT) Received: from dw-tp.ibmuc.com ([171.76.85.20]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e5df40265fsm3463176a91.0.2024.10.24.20.46.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Oct 2024 20:46:14 -0700 (PDT) From: "Ritesh Harjani (IBM)" To: linux-ext4@vger.kernel.org Cc: Theodore Ts'o , Jan Kara , "Darrick J . Wong" , Christoph Hellwig , John Garry , Ojaswin Mujoo , Dave Chinner , linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, "Ritesh Harjani (IBM)" Subject: [PATCH 2/6] ext4: Check for atomic writes support in write iter Date: Fri, 25 Oct 2024 09:15:51 +0530 Message-ID: <319766d2fd03bd47f773d320577f263f68ba67a1.1729825985.git.ritesh.list@gmail.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Let's validate using generic_atomic_write_valid() in ext4_file_write_iter() if the write request has IOCB_ATOMIC set. Signed-off-by: Ritesh Harjani (IBM) --- fs/ext4/file.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/fs/ext4/file.c b/fs/ext4/file.c index f14aed14b9cf..b06c5d34bbd2 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -692,6 +692,20 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_it= er *from) if (IS_DAX(inode)) return ext4_dax_write_iter(iocb, from); #endif + + if (iocb->ki_flags & IOCB_ATOMIC) { + size_t len =3D iov_iter_count(from); + int ret; + + if (!IS_ALIGNED(len, EXT4_SB(inode->i_sb)->fs_awu_min) || + len > EXT4_SB(inode->i_sb)->fs_awu_max) + return -EINVAL; + + ret =3D generic_atomic_write_valid(iocb, from); + if (ret) + return ret; + } + if (iocb->ki_flags & IOCB_DIRECT) return ext4_dio_write_iter(iocb, from); else --=20 2.46.0