linux-kernel - [RFC PATCH v1 6/6] doc: proc: Add description of subset=allowlist

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Date:   Wed, 25 Jan 2023 16:28:53 +0100
From:   Alexey Gladkov <legion@...nel.org>
To:     LKML <linux-kernel@...r.kernel.org>, containers@...ts.linux.dev,
        linux-fsdevel@...r.kernel.org
Cc:     Alexey Dobriyan <adobriyan@...il.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christian Brauner <brauner@...nel.org>,
        Val Cowan <vcowan@...hat.com>
Subject: [RFC PATCH v1 6/6] doc: proc: Add description of subset=allowlist

Signed-off-by: Alexey Gladkov <legion@...nel.org>
---
 Documentation/filesystems/proc.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index e224b6d5b642..c2598bca8193 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -2213,6 +2213,16 @@ information about processes information, just add identd to this group.
 subset=pid hides all top level files and directories in the procfs that
 are not related to tasks.
 
+subset=allowlist allows you to specify a list of files and directories to
+which you want to provide access. If the option is specified, then the
+/proc/allowlist will appear at the top level of the filesystem. By default, this
+file contains only its name. The user can add or remove other filenames and
+directories. To prohibit editing the allowlist, you need to exclude its name
+from the list of allowed ones.
+
+Different subset= option arguments can be combined using the plus(+) delimiter.
+For example: subset=pid+allowlist
+
 Chapter 5: Filesystem behavior
 ==============================
 
-- 
2.33.6