From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753580AbcJCTYE (ORCPT ); Mon, 3 Oct 2016 15:24:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45592 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753261AbcJCTXF (ORCPT ); Mon, 3 Oct 2016 15:23:05 -0400 From: Andy Grover To: gregkh@linuxfoundation.org, snitzer@redhat.com Cc: dm-devel@redhat.com, linux-kernel@vger.kernel.org Subject: [PATCH 7/9] dm: Implement dm_uevent_add() Date: Mon, 3 Oct 2016 12:22:58 -0700 Message-Id: <1475522580-16723-8-git-send-email-agrover@redhat.com> In-Reply-To: <1475522580-16723-1-git-send-email-agrover@redhat.com> References: <1475522580-16723-1-git-send-email-agrover@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Mon, 03 Oct 2016 19:23:04 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This helper function builds and enqueues the uevent. Targets can use this when they do not need to customize the uevent beyond its name. Signed-off-by: Andy Grover --- Documentation/device-mapper/dm-uevent.txt | 5 +++++ drivers/md/dm-uevent.c | 26 ++++++++++++++++++++++++++ include/linux/device-mapper.h | 1 + 3 files changed, 32 insertions(+) diff --git a/Documentation/device-mapper/dm-uevent.txt b/Documentation/device-mapper/dm-uevent.txt index 4fcb71d..097e7f4 100644 --- a/Documentation/device-mapper/dm-uevent.txt +++ b/Documentation/device-mapper/dm-uevent.txt @@ -30,6 +30,11 @@ void dm_uevent_free(struct dm_uevent *event) Something went wrong, free the uevent instead of queueing it. +void dm_uevent_add(struct dm_target *ti, enum kobject_action action, char *name) + +Helper function that builds and queues a uevent if no additional +variables need to be added. + void dm_table_event(struct dm_table *t) Triggers sending of queued uevents as well as waking up processes waiting on diff --git a/drivers/md/dm-uevent.c b/drivers/md/dm-uevent.c index 6a72de7..d139135 100644 --- a/drivers/md/dm-uevent.c +++ b/drivers/md/dm-uevent.c @@ -95,6 +95,32 @@ err_nomem: EXPORT_SYMBOL_GPL(dm_uevent_build); /** + * dm_uevent_add - Create and queue a basic uevent + * + * @ti: The target to add a uevent for + * @action: The kobject action + * @name: The name of the uevent to add and queue + * + * If targets wish to create and queue a uevent but don't need to add + * extra vars, they can do so more easily by calling this. + * This is usually followed by a call to dm_table_event(). + */ +void dm_uevent_add(struct dm_target *ti, enum kobject_action action, char *name) +{ + struct mapped_device *md = dm_table_get_md(ti->table); + struct dm_uevent *event; + + event = dm_uevent_build(md, ti, action, name); + if (IS_ERR(event)) { + DMERR("%s: dm_uevent_build() failed", __func__); + return; + } + + dm_uevent_queue(md, &event->elist); +} +EXPORT_SYMBOL_GPL(dm_uevent_add); + +/** * dm_send_uevents - send uevents for given list * * @events: list of events to send diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 024207c..c102e29 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -420,6 +420,7 @@ uint32_t dm_get_event_nr(struct mapped_device *md); int dm_wait_event(struct mapped_device *md, int event_nr); uint32_t dm_next_uevent_seq(struct mapped_device *md); void dm_uevent_queue(struct mapped_device *md, struct list_head *elist); +void dm_uevent_add(struct dm_target *ti, enum kobject_action action, char *name); /* * Info functions. -- 2.7.4