From patchwork Wed May 18 23:50:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 12854385 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 C7B04C352AA for ; Wed, 18 May 2022 23:53:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231720AbiERXxj (ORCPT ); Wed, 18 May 2022 19:53:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231597AbiERXxf (ORCPT ); Wed, 18 May 2022 19:53:35 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 31B999BAFC; Wed, 18 May 2022 16:53:34 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 463A4B8225C; Wed, 18 May 2022 23:53:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A6A28C3411C; Wed, 18 May 2022 23:53:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652918012; bh=mHfaNK/yqtCaO/YT1VZcqJFlQSMjauSczWDdIigQbH4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X9OLn4uN0IO4WyRABB3ByikS4qWBMsqFglNa8PeQ72cZC0adZSBvyLrplspqEtJRX mZxZJWuw2e0+J9G4KOg8g+NuMV3eMDe6MRLVhA2PXNtqgJ/22jaYPwmRJBuar7XPkV BZMEX5DB0YvhDEVWNjqSNgnIYGirlIO+VpWpNzNKoRiCPTwZ013i1D1hEWsq+odUQ0 jqK5EGlKizkZblHmj0qlIhshRQvVwH+kkUcnm3PZiENEHBLFjoXOZL42G3moRRaLxh iMIuOcvo/Xjrlh0wnusnqJd4zv9t2f8C4dAh8KR9Ee024Rmn8spgTVzaebA0uQzBKl AGm4vyf4h8/Mg== From: Eric Biggers To: linux-fsdevel@vger.kernel.org Cc: linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-api@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Keith Busch Subject: [RFC PATCH v2 7/7] f2fs: support STATX_IOALIGN Date: Wed, 18 May 2022 16:50:11 -0700 Message-Id: <20220518235011.153058-8-ebiggers@kernel.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220518235011.153058-1-ebiggers@kernel.org> References: <20220518235011.153058-1-ebiggers@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Eric Biggers Add support for STATX_IOALIGN to f2fs, so that I/O alignment information is exposed to userspace in a consistent and easy-to-use way. Signed-off-by: Eric Biggers --- fs/f2fs/file.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index c32f7722ba6b0..f89a190949c59 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -835,6 +835,21 @@ static bool f2fs_force_buffered_io(struct inode *inode) return false; } +/* Return the maximum value of io_opt across all the filesystem's devices. */ +static unsigned int f2fs_max_io_opt(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + int io_opt = 0; + int i; + + if (!f2fs_is_multi_device(sbi)) + return bdev_io_opt(sbi->sb->s_bdev); + + for (i = 0; i < sbi->s_ndevs; i++) + io_opt = max(io_opt, bdev_io_opt(FDEV(i).bdev)); + return io_opt; +} + int f2fs_getattr(struct user_namespace *mnt_userns, const struct path *path, struct kstat *stat, u32 request_mask, unsigned int query_flags) { @@ -851,6 +866,22 @@ int f2fs_getattr(struct user_namespace *mnt_userns, const struct path *path, stat->btime.tv_nsec = fi->i_crtime.tv_nsec; } + /* + * Return the I/O alignment information if requested. We only return + * this information when requested, since on encrypted files it might + * take a fair bit of work to get if the file wasn't opened recently. + */ + if ((request_mask & STATX_IOALIGN) && S_ISREG(inode->i_mode)) { + unsigned int bsize = i_blocksize(inode); + + stat->result_mask |= STATX_IOALIGN; + if (!f2fs_force_buffered_io(inode)) { + stat->mem_align_dio = bsize; + stat->offset_align_dio = bsize; + } + stat->offset_align_optimal = max(f2fs_max_io_opt(inode), bsize); + } + flags = fi->i_flags; if (flags & F2FS_COMPR_FL) stat->attributes |= STATX_ATTR_COMPRESSED;