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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5DD61C433EF for ; Tue, 7 Jun 2022 22:42:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1383028AbiFGWkI (ORCPT ); Tue, 7 Jun 2022 18:40:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379087AbiFGVZL (ORCPT ); Tue, 7 Jun 2022 17:25:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF716150B5D; Tue, 7 Jun 2022 12:01:30 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 8991861768; Tue, 7 Jun 2022 19:01:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98FDFC385A2; Tue, 7 Jun 2022 19:01:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1654628490; bh=EFyZopC0NhI4QmX1Xz/RSlu+pmSVcB0t0WKz9AarTs8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dc74W2XsOxZWDeWMsHoXLNRWrcNxfXgFm9mVu6XpvNO798XbVPyMFCZd1efBv5cRV 9+lZh7e8gy1JWseBbI/QhgjmYfo9/mplJzyAnid9F+qW8ez/YXWf1sTMapnDhvxUgn rEvdfnc8fhogB+hJGrmOicRPfoQuj59Xu960olGg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Amir Goldstein , Jan Kara , Sasha Levin Subject: [PATCH 5.18 348/879] inotify: show inotify mask flags in proc fdinfo Date: Tue, 7 Jun 2022 18:57:46 +0200 Message-Id: <20220607165012.962358623@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220607165002.659942637@linuxfoundation.org> References: <20220607165002.659942637@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Amir Goldstein [ Upstream commit a32e697cda27679a0327ae2cafdad8c7170f548f ] The inotify mask flags IN_ONESHOT and IN_EXCL_UNLINK are not "internal to kernel" and should be exposed in procfs fdinfo so CRIU can restore them. Fixes: 6933599697c9 ("inotify: hide internal kernel bits from fdinfo") Link: https://lore.kernel.org/r/20220422120327.3459282-2-amir73il@gmail.com Signed-off-by: Amir Goldstein Signed-off-by: Jan Kara Signed-off-by: Sasha Levin --- fs/notify/fdinfo.c | 11 ++--------- fs/notify/inotify/inotify.h | 12 ++++++++++++ fs/notify/inotify/inotify_user.c | 2 +- 3 files changed, 15 insertions(+), 10 deletions(-) diff --git a/fs/notify/fdinfo.c b/fs/notify/fdinfo.c index 57f0d5d9f934..3451708fd035 100644 --- a/fs/notify/fdinfo.c +++ b/fs/notify/fdinfo.c @@ -83,16 +83,9 @@ static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark); inode = igrab(fsnotify_conn_inode(mark->connector)); if (inode) { - /* - * IN_ALL_EVENTS represents all of the mask bits - * that we expose to userspace. There is at - * least one bit (FS_EVENT_ON_CHILD) which is - * used only internally to the kernel. - */ - u32 mask = mark->mask & IN_ALL_EVENTS; - seq_printf(m, "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:%x ", + seq_printf(m, "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:0 ", inode_mark->wd, inode->i_ino, inode->i_sb->s_dev, - mask, mark->ignored_mask); + inotify_mark_user_mask(mark)); show_mark_fhandle(m, inode); seq_putc(m, '\n'); iput(inode); diff --git a/fs/notify/inotify/inotify.h b/fs/notify/inotify/inotify.h index 2007e3711916..8f00151eb731 100644 --- a/fs/notify/inotify/inotify.h +++ b/fs/notify/inotify/inotify.h @@ -22,6 +22,18 @@ static inline struct inotify_event_info *INOTIFY_E(struct fsnotify_event *fse) return container_of(fse, struct inotify_event_info, fse); } +/* + * INOTIFY_USER_FLAGS represents all of the mask bits that we expose to + * userspace. There is at least one bit (FS_EVENT_ON_CHILD) which is + * used only internally to the kernel. + */ +#define INOTIFY_USER_MASK (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK) + +static inline __u32 inotify_mark_user_mask(struct fsnotify_mark *fsn_mark) +{ + return fsn_mark->mask & INOTIFY_USER_MASK; +} + extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark, struct fsnotify_group *group); extern int inotify_handle_inode_event(struct fsnotify_mark *inode_mark, diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c index 54583f62dc44..3ef57db0ec9d 100644 --- a/fs/notify/inotify/inotify_user.c +++ b/fs/notify/inotify/inotify_user.c @@ -110,7 +110,7 @@ static inline __u32 inotify_arg_to_mask(struct inode *inode, u32 arg) mask |= FS_EVENT_ON_CHILD; /* mask off the flags used to open the fd */ - mask |= (arg & (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK)); + mask |= (arg & INOTIFY_USER_MASK); return mask; } -- 2.35.1