From patchwork Fri Aug 25 13:54:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hao Xu X-Patchwork-Id: 13365731 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 lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 570E3C71133 for ; Fri, 25 Aug 2023 13:56:17 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-4.v29.lw.sourceforge.com) by sfs-ml-4.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1qZXIO-0004Yq-6f; Fri, 25 Aug 2023 13:56:16 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-4.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1qZXIN-0004Yk-6s for linux-f2fs-devel@lists.sourceforge.net; Fri, 25 Aug 2023 13:56:15 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=e5tdpTadoLYdZJB8cQ8K1ymkQcAcLx9XJrtCjJGJaVs=; b=LLPFp/FljpS8pvByC7MkKKmosf n78fB0Tq3acwvWAZ0LzGmyKaS1J3cPsppfs2kKt/VecCLD3U5v4hz21tC5YT74obRygJuHGx4zIAX d03FjoSrqoZVtpwyw1LxO37jjZHX4qxwKp5MWZSJLa3Mjn2QAvhpdRwEes0qE38X/YG4=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=e5tdpTadoLYdZJB8cQ8K1ymkQcAcLx9XJrtCjJGJaVs=; b=k4mNv5nblPEzIAszsDDqaZkygA PdR35EqEsIs7Qw7+kDdfF4kLUhbVBkZ4S6zY3emaH+KQ03jIHbBnN4gcP2VqeLJ37f45N/LjcRKfx fS18hZkOX+WazsrnNt6HwM/N8P613qZh07o9ym5D5zvhkHST5JWtTa6G2ZTxhx4Gar3U=; Received: from out-251.mta1.migadu.com ([95.215.58.251]) by sfi-mx-1.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1qZXIL-00FHcD-P6 for linux-f2fs-devel@lists.sourceforge.net; Fri, 25 Aug 2023 13:56:15 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1692971767; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=e5tdpTadoLYdZJB8cQ8K1ymkQcAcLx9XJrtCjJGJaVs=; b=TwbW5BAdvmgSbpeRXB5oj2rBwHJYuNVAZ0wuNv54dKDSbdHWvpzdJPpdSYGzhDtIzGSB4F YisrVQZHUjFuGHrj+vJDxnd62bdWDda2XlxMi5lt3S7M7T/A05SHzZ7P+IsnTBGPpTbdoc kkwgLR7zX0hVNtt4X1uvx8MlGeKiBn4= From: Hao Xu To: io-uring@vger.kernel.org, Jens Axboe Date: Fri, 25 Aug 2023 21:54:06 +0800 Message-Id: <20230825135431.1317785-5-hao.xu@linux.dev> In-Reply-To: <20230825135431.1317785-1-hao.xu@linux.dev> References: <20230825135431.1317785-1-hao.xu@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Headers-End: 1qZXIL-00FHcD-P6 Subject: [f2fs-dev] [PATCH 04/29] vfs: add nowait flag for struct dir_context X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wanpeng Li , "Darrick J . Wong" , Dominique Martinet , Dave Chinner , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Stefan Roesch , Clay Harris , linux-s390@vger.kernel.org, linux-nilfs@vger.kernel.org, codalist@coda.cs.cmu.edu, cluster-devel@redhat.com, linux-cachefs@redhat.com, linux-ext4@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-block@vger.kernel.org, Alexander Viro , Christian Brauner , netdev@vger.kernel.org, samba-technical@lists.samba.org, linux-unionfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, bpf@vger.kernel.org, Pavel Begunkov , linux-btrfs@vger.kernel.org Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Hao Xu The flags will allow passing DIR_CONTEXT_F_NOWAIT to iterate() implementations that support it (as signaled through FMODE_NWAIT in file->f_mode) Notes: - considered using IOCB_NOWAIT but if we add more flags later it would be confusing to keep track of which values are valid, use dedicated flags - might want to check ctx.flags & DIR_CONTEXT_F_NOWAIT is only set when file->f_mode & FMODE_NOWAIT in iterate_dir() as e.g. WARN_ONCE? Co-developed-by: Dominique Martinet Signed-off-by: Dominique Martinet Signed-off-by: Hao Xu --- fs/internal.h | 2 +- fs/readdir.c | 6 ++++-- include/linux/fs.h | 8 ++++++++ 3 files changed, 13 insertions(+), 3 deletions(-) diff --git a/fs/internal.h b/fs/internal.h index b1f66e52d61b..7508d485c655 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -311,4 +311,4 @@ void mnt_idmap_put(struct mnt_idmap *idmap); struct linux_dirent64; int vfs_getdents(struct file *file, struct linux_dirent64 __user *dirent, - unsigned int count); + unsigned int count, unsigned long flags); diff --git a/fs/readdir.c b/fs/readdir.c index 9592259b7e7f..b80caf4c9321 100644 --- a/fs/readdir.c +++ b/fs/readdir.c @@ -358,12 +358,14 @@ static bool filldir64(struct dir_context *ctx, const char *name, int namlen, * @file : pointer to file struct of directory * @dirent : pointer to user directory structure * @count : size of buffer + * @flags : additional dir_context flags */ int vfs_getdents(struct file *file, struct linux_dirent64 __user *dirent, - unsigned int count) + unsigned int count, unsigned long flags) { struct getdents_callback64 buf = { .ctx.actor = filldir64, + .ctx.flags = flags, .count = count, .current_dir = dirent }; @@ -395,7 +397,7 @@ SYSCALL_DEFINE3(getdents64, unsigned int, fd, if (!f.file) return -EBADF; - error = vfs_getdents(f.file, dirent, count); + error = vfs_getdents(f.file, dirent, count, 0); fdput_pos(f); return error; diff --git a/include/linux/fs.h b/include/linux/fs.h index 6867512907d6..f3e315e8efdd 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1719,8 +1719,16 @@ typedef bool (*filldir_t)(struct dir_context *, const char *, int, loff_t, u64, struct dir_context { filldir_t actor; loff_t pos; + unsigned long flags; }; +/* + * flags for dir_context flags + * DIR_CONTEXT_F_NOWAIT: Request non-blocking iterate + * (requires file->f_mode & FMODE_NOWAIT) + */ +#define DIR_CONTEXT_F_NOWAIT (1 << 0) + /* * These flags let !MMU mmap() govern direct device mapping vs immediate * copying more easily for MAP_PRIVATE, especially for ROM filesystems.