From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933425AbWF0Euy (ORCPT ); Tue, 27 Jun 2006 00:50:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030651AbWF0Elz (ORCPT ); Tue, 27 Jun 2006 00:41:55 -0400 Received: from cust9421.vic01.dataco.com.au ([203.171.70.205]:44507 "EHLO nigel.suspend2.net") by vger.kernel.org with ESMTP id S933425AbWF0Ela (ORCPT ); Tue, 27 Jun 2006 00:41:30 -0400 From: Nigel Cunningham Subject: [Suspend2][ 05/21] [Suspend2] Receive a message from the userui. Date: Tue, 27 Jun 2006 14:41:29 +1000 To: linux-kernel@vger.kernel.org Message-Id: <20060627044128.14883.19346.stgit@nigel.suspend2.net> In-Reply-To: <20060627044112.14883.55823.stgit@nigel.suspend2.net> References: <20060627044112.14883.55823.stgit@nigel.suspend2.net> Content-Type: text/plain; charset=utf-8; format=fixed Content-Transfer-Encoding: 8bit User-Agent: StGIT/0.9 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Receive a message from the userspace user interface. Signed-off-by: Nigel Cunningham kernel/power/ui.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 58 insertions(+), 0 deletions(-) diff --git a/kernel/power/ui.c b/kernel/power/ui.c index 365c033..48719de 100644 --- a/kernel/power/ui.c +++ b/kernel/power/ui.c @@ -118,3 +118,61 @@ void request_abort_suspend(void) } } +static int userui_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) +{ + int type; + int *data; + + type = nlh->nlmsg_type; + + /* A control message: ignore them */ + if (type < NETLINK_MSG_BASE) + return 0; + + /* Unknown message: reply with EINVAL */ + if (type >= USERUI_MSG_MAX) + return -EINVAL; + + /* All operations require privileges, even GET */ + if (security_netlink_recv(skb)) + return -EPERM; + + /* Only allow one task to receive NOFREEZE privileges */ + if (type == NETLINK_MSG_NOFREEZE_ME && ui_helper_data.pid != -1) + return -EBUSY; + + data = (int*)NLMSG_DATA(nlh); + + switch (type) { + case USERUI_MSG_ABORT: + request_abort_suspend(); + break; + case USERUI_MSG_GET_STATE: + suspend_send_netlink_message(&ui_helper_data, + USERUI_MSG_GET_STATE, &suspend_action, + sizeof(suspend_action)); + break; + case USERUI_MSG_GET_DEBUG_STATE: + suspend_send_netlink_message(&ui_helper_data, + USERUI_MSG_GET_DEBUG_STATE, + &suspend_debug_state, + sizeof(suspend_debug_state)); + break; + case USERUI_MSG_SET_STATE: + if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(int))) + return -EINVAL; + ui_nl_set_state(*data); + break; + case USERUI_MSG_SET_DEBUG_STATE: + if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(int))) + return -EINVAL; + suspend_debug_state = (*data); + break; + case USERUI_MSG_SPACE: + wake_up_interruptible(&userui_wait_for_key); + break; + } + + return 1; +} + -- Nigel Cunningham nigel at suspend2 dot net