Messages in this thread Patch in this message | | | From | Nigel Cunningham <> | Subject | [Suspend2][ 05/21] [Suspend2] Receive a message from the userui. | Date | Tue, 27 Jun 2006 14:41:29 +1000 |
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Receive a message from the userspace user interface.
Signed-off-by: Nigel Cunningham <nigel@suspend2.net>
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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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