linux-kernel - [PATCH 3/9] watch_queue: Drop references to /dev/watch

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Message-ID: <160649554788.2744658.2677540173062709534.stgit@warthog.procyon.org.uk>
Date:   Fri, 27 Nov 2020 16:45:47 +0000
From:   David Howells <dhowells@...hat.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     Gabriel Krisman Bertazi <krisman@...labora.com>,
        dhowells@...hat.com, keyrings@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/9] watch_queue: Drop references to /dev/watch_queue

From: Gabriel Krisman Bertazi <krisman@...labora.com>

The merged API doesn't use a watch_queue device, but instead relies on
pipes, so let the documentation reflect that.

Fixes: f7e47677e39a ("watch_queue: Add a key/keyring notification facility")
Signed-off-by: Gabriel Krisman Bertazi <krisman@...labora.com>
Signed-off-by: David Howells <dhowells@...hat.com>
---

 Documentation/security/keys/core.rst |    4 ++--
 samples/Kconfig                      |    2 +-
 samples/watch_queue/watch_test.c     |    2 +-
 security/keys/Kconfig                |    8 ++++----
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Documentation/security/keys/core.rst b/Documentation/security/keys/core.rst
index aa0081685ee1..b3ed5c581034 100644
--- a/Documentation/security/keys/core.rst
+++ b/Documentation/security/keys/core.rst
@@ -1040,8 +1040,8 @@ The keyctl syscall functions are:
 
      "key" is the ID of the key to be watched.
 
-     "queue_fd" is a file descriptor referring to an open "/dev/watch_queue"
-     which manages the buffer into which notifications will be delivered.
+     "queue_fd" is a file descriptor referring to an open pipe which
+     manages the buffer into which notifications will be delivered.
 
      "filter" is either NULL to remove a watch or a filter specification to
      indicate what events are required from the key.
diff --git a/samples/Kconfig b/samples/Kconfig
index 0ed6e4d71d87..e76cdfc50e25 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -210,7 +210,7 @@ config SAMPLE_WATCHDOG
 	depends on CC_CAN_LINK
 
 config SAMPLE_WATCH_QUEUE
-	bool "Build example /dev/watch_queue notification consumer"
+	bool "Build example watch_queue notification API consumer"
 	depends on CC_CAN_LINK && HEADERS_INSTALL
 	help
 	  Build example userspace program to use the new mount_notify(),
diff --git a/samples/watch_queue/watch_test.c b/samples/watch_queue/watch_test.c
index 46e618a897fe..8c6cb57d5cfc 100644
--- a/samples/watch_queue/watch_test.c
+++ b/samples/watch_queue/watch_test.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Use /dev/watch_queue to watch for notifications.
+/* Use watch_queue API to watch for notifications.
  *
  * Copyright (C) 2020 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@...hat.com)
diff --git a/security/keys/Kconfig b/security/keys/Kconfig
index 83bc23409164..c161642a8484 100644
--- a/security/keys/Kconfig
+++ b/security/keys/Kconfig
@@ -119,7 +119,7 @@ config KEY_NOTIFICATIONS
 	bool "Provide key/keyring change notifications"
 	depends on KEYS && WATCH_QUEUE
 	help
-	  This option provides support for getting change notifications on keys
-	  and keyrings on which the caller has View permission.  This makes use
-	  of the /dev/watch_queue misc device to handle the notification
-	  buffer and provides KEYCTL_WATCH_KEY to enable/disable watches.
+	  This option provides support for getting change notifications
+	  on keys and keyrings on which the caller has View permission.
+	  This makes use of pipes to handle the notification buffer and
+	  provides KEYCTL_WATCH_KEY to enable/disable watches.