From patchwork Wed Sep 20 19:14:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13393287 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EF7D5C04FF3 for ; Wed, 20 Sep 2023 19:15:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230031AbjITTP3 (ORCPT ); Wed, 20 Sep 2023 15:15:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229597AbjITTPZ (ORCPT ); Wed, 20 Sep 2023 15:15:25 -0400 Received: from mail-pf1-f177.google.com (mail-pf1-f177.google.com [209.85.210.177]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE83CDD; Wed, 20 Sep 2023 12:14:53 -0700 (PDT) Received: by mail-pf1-f177.google.com with SMTP id d2e1a72fcca58-68fdcc37827so877793b3a.0; Wed, 20 Sep 2023 12:14:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695237293; x=1695842093; 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=CgjfA+NFbyOFJy7VI1AAXxPugeWclnjTAzkFxQOWY48=; b=WwCSkjFv5tRTj6IJGoHwKcs/5/p0ZTpjF008jIjD9UGKysdAoIQawEKUTuVKDguCDS b7gKLQLpn67K0BukRTK/ZFB3M3EqY70riqwjiEM/oew+d8Y3JSDS36yopN4hGLQc01DN 6Xxro+oskWc4Pyx7tfw4pYX2BoiOLxbPFgGYCLvYemdprzulOiaNeJTAzpKdcZgLACOV oMPXz3iBaTtAacL/v+GoUQ0ygZPGLp/HBtDC7rS4qzrirV3lZngRk/sYansgiwvEFcn3 T9a5X13fPuVHKLMkCKaQFTw1V3le73AMCgZDmZ67wnSFpGaQSItR/lmg9jDwMpFUdMog dzWQ== X-Gm-Message-State: AOJu0YwRiII79sl8SLTCLvZjfWJSRs+DU+HFqfBR5FMbux8rcs0NJVB3 7X2EbM+GR/94j4KeuvsigSAuQDe1jXs= X-Google-Smtp-Source: AGHT+IEwSUN6YpTGWAKfPHwR8Rl/USX8Aye0jemdGclQ2Nh+Tz738zlB6D4H+6RdgiXus+f1lTCueg== X-Received: by 2002:a17:90b:4f8b:b0:276:696b:1dd9 with SMTP id qe11-20020a17090b4f8b00b00276696b1dd9mr8659049pjb.15.1695237292721; Wed, 20 Sep 2023 12:14:52 -0700 (PDT) Received: from bvanassche-linux.mtv.corp.google.com ([2620:15c:211:201:b0c6:e5b6:49ef:e0bd]) by smtp.gmail.com with ESMTPSA id a13-20020a17090a8c0d00b002633fa95ac2sm1656318pjo.13.2023.09.20.12.14.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Sep 2023 12:14:52 -0700 (PDT) From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, "Martin K . Petersen" , Christoph Hellwig , Bart Van Assche , Dave Chinner , Alexander Viro , Christian Brauner , Jeff Layton , Chuck Lever Subject: [PATCH 02/13] fs: Restore support for F_GET_FILE_RW_HINT and F_SET_FILE_RW_HINT Date: Wed, 20 Sep 2023 12:14:27 -0700 Message-ID: <20230920191442.3701673-3-bvanassche@acm.org> X-Mailer: git-send-email 2.42.0.459.ge4e396fd5e-goog In-Reply-To: <20230920191442.3701673-1-bvanassche@acm.org> References: <20230920191442.3701673-1-bvanassche@acm.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Restore support for F_GET_FILE_RW_HINT and F_SET_FILE_RW_HINT by reverting commit 7b12e49669c9 ("fs: remove fs.f_write_hint"). Cc: Christoph Hellwig Cc: Dave Chinner Signed-off-by: Bart Van Assche Reviewed-by: Avri Altman Reviewed-by: Bean Huo Reviewed-by: Daejun Park --- fs/fcntl.c | 18 ++++++++++++++++++ fs/open.c | 1 + include/linux/fs.h | 9 +++++++++ 3 files changed, 28 insertions(+) diff --git a/fs/fcntl.c b/fs/fcntl.c index e871009f6c88..acaa49fb1a35 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -292,6 +292,22 @@ static long fcntl_rw_hint(struct file *file, unsigned int cmd, u64 h; switch (cmd) { + case F_GET_FILE_RW_HINT: + h = file_write_hint(file); + if (copy_to_user(argp, &h, sizeof(*argp))) + return -EFAULT; + return 0; + case F_SET_FILE_RW_HINT: + if (copy_from_user(&h, argp, sizeof(h))) + return -EFAULT; + hint = (enum rw_hint) h; + if (!rw_hint_valid(hint)) + return -EINVAL; + + spin_lock(&file->f_lock); + file->f_write_hint = hint; + spin_unlock(&file->f_lock); + return 0; case F_GET_RW_HINT: h = inode->i_write_hint; if (copy_to_user(argp, &h, sizeof(*argp))) @@ -417,6 +433,8 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg, break; case F_GET_RW_HINT: case F_SET_RW_HINT: + case F_GET_FILE_RW_HINT: + case F_SET_FILE_RW_HINT: err = fcntl_rw_hint(filp, cmd, arg); break; default: diff --git a/fs/open.c b/fs/open.c index 98f6601fbac6..9e31b8c50cc4 100644 --- a/fs/open.c +++ b/fs/open.c @@ -942,6 +942,7 @@ static int do_dentry_open(struct file *f, if (f->f_mapping->a_ops && f->f_mapping->a_ops->direct_IO) f->f_mode |= FMODE_CAN_ODIRECT; + f->f_write_hint = WRITE_LIFE_NOT_SET; f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC); f->f_iocb_flags = iocb_flags(f); diff --git a/include/linux/fs.h b/include/linux/fs.h index 4aeb3fa11927..ba2c5c90af6d 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1001,6 +1001,7 @@ struct file { * Must not be taken from IRQ context. */ spinlock_t f_lock; + enum rw_hint f_write_hint; fmode_t f_mode; atomic_long_t f_count; struct mutex f_pos_lock; @@ -2134,6 +2135,14 @@ static inline bool HAS_UNMAPPED_ID(struct mnt_idmap *idmap, !vfsgid_valid(i_gid_into_vfsgid(idmap, inode)); } +static inline enum rw_hint file_write_hint(struct file *file) +{ + if (file->f_write_hint != WRITE_LIFE_NOT_SET) + return file->f_write_hint; + + return file_inode(file)->i_write_hint; +} + static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp) { *kiocb = (struct kiocb) {