Linux-libre 4.2-gnu

1 files changed, 0 insertions, 658 deletions

diff --git a/kernel/power/tuxonice_userui.c b/kernel/power/tuxonice_userui.c
deleted file mode 100644
index edc885c72..000000000
--- a/kernel/power/tuxonice_userui.c
+++ /dev/null
@@ -1,658 +0,0 @@
-/*
- * kernel/power/user_ui.c
- *
- * Copyright (C) 2005-2007 Bernard Blackham
- * Copyright (C) 2002-2015 Nigel Cunningham (nigel at nigelcunningham com au)
- *
- * This file is released under the GPLv2.
- *
- * Routines for TuxOnIce's user interface.
- *
- * The user interface code talks to a userspace program via a
- * netlink socket.
- *
- * The kernel side:
- * - starts the userui program;
- * - sends text messages and progress bar status;
- *
- * The user space side:
- * - passes messages regarding user requests (abort, toggle reboot etc)
- *
- */
-
-#define __KERNEL_SYSCALLS__
-
-#include <linux/suspend.h>
-#include <linux/freezer.h>
-#include <linux/console.h>
-#include <linux/ctype.h>
-#include <linux/tty.h>
-#include <linux/vt_kern.h>
-#include <linux/reboot.h>
-#include <linux/security.h>
-#include <linux/syscalls.h>
-#include <linux/vt.h>
-
-#include "tuxonice_sysfs.h"
-#include "tuxonice_modules.h"
-#include "tuxonice.h"
-#include "tuxonice_ui.h"
-#include "tuxonice_netlink.h"
-#include "tuxonice_power_off.h"
-
-static char local_printf_buf[1024];	/* Same as printk - should be safe */
-
-static struct user_helper_data ui_helper_data;
-static struct toi_module_ops userui_ops;
-static int orig_kmsg;
-
-static char lastheader[512];
-static int lastheader_message_len;
-static int ui_helper_changed; /* Used at resume-time so don't overwrite value
-				set from initrd/ramfs. */
-
-/* Number of distinct progress amounts that userspace can display */
-static int progress_granularity = 30;
-
-static DECLARE_WAIT_QUEUE_HEAD(userui_wait_for_key);
-static int userui_wait_should_wake;
-
-#define toi_stop_waiting_for_userui_key() \
-{ \
-	userui_wait_should_wake = true; \
-	wake_up_interruptible(&userui_wait_for_key); \
-}
-
-/**
- * ui_nl_set_state - Update toi_action based on a message from userui.
- *
- * @n: The bit (1 << bit) to set.
- */
-static void ui_nl_set_state(int n)
-{
-	/* Only let them change certain settings */
-	static const u32 toi_action_mask =
-		(1 << TOI_REBOOT) | (1 << TOI_PAUSE) |
-		(1 << TOI_LOGALL) |
-		(1 << TOI_SINGLESTEP) |
-		(1 << TOI_PAUSE_NEAR_PAGESET_END);
-	static unsigned long new_action;
-
-	new_action = (toi_bkd.toi_action & (~toi_action_mask)) |
-		(n & toi_action_mask);
-
-	printk(KERN_DEBUG "n is %x. Action flags being changed from %lx "
-			"to %lx.", n, toi_bkd.toi_action, new_action);
-	toi_bkd.toi_action = new_action;
-
-	if (!test_action_state(TOI_PAUSE) &&
-			!test_action_state(TOI_SINGLESTEP))
-		toi_stop_waiting_for_userui_key();
-}
-
-/**
- * userui_post_atomic_restore - Tell userui that atomic restore just happened.
- *
- * Tell userui that atomic restore just occured, so that it can do things like
- * redrawing the screen, re-getting settings and so on.
- */
-static void userui_post_atomic_restore(struct toi_boot_kernel_data *bkd)
-{
-	toi_send_netlink_message(&ui_helper_data,
-			USERUI_MSG_POST_ATOMIC_RESTORE, NULL, 0);
-}
-
-/**
- * userui_storage_needed - Report how much memory in image header is needed.
- */
-static int userui_storage_needed(void)
-{
-	return sizeof(ui_helper_data.program) + 1 + sizeof(int);
-}
-
-/**
- * userui_save_config_info - Fill buffer with config info for image header.
- *
- * @buf: Buffer into which to put the config info we want to save.
- */
-static int userui_save_config_info(char *buf)
-{
-	*((int *) buf) = progress_granularity;
-	memcpy(buf + sizeof(int), ui_helper_data.program,
-			sizeof(ui_helper_data.program));
-	return sizeof(ui_helper_data.program) + sizeof(int) + 1;
-}
-
-/**
- * userui_load_config_info - Restore config info from buffer.
- *
- * @buf: Buffer containing header info loaded.
- * @size: Size of data loaded for this module.
- */
-static void userui_load_config_info(char *buf, int size)
-{
-	progress_granularity = *((int *) buf);
-	size -= sizeof(int);
-
-	/* Don't load the saved path if one has already been set */
-	if (ui_helper_changed)
-		return;
-
-	if (size > sizeof(ui_helper_data.program))
-		size = sizeof(ui_helper_data.program);
-
-	memcpy(ui_helper_data.program, buf + sizeof(int), size);
-	ui_helper_data.program[sizeof(ui_helper_data.program)-1] = '\0';
-}
-
-/**
- * set_ui_program_set: Record that userui program was changed.
- *
- * Side effect routine for when the userui program is set. In an initrd or
- * ramfs, the user may set a location for the userui program. If this happens,
- * we don't want to reload the value that was saved in the image header. This
- * routine allows us to flag that we shouldn't restore the program name from
- * the image header.
- */
-static void set_ui_program_set(void)
-{
-	ui_helper_changed = 1;
-}
-
-/**
- * userui_memory_needed - Tell core how much memory to reserve for us.
- */
-static int userui_memory_needed(void)
-{
-	/* ball park figure of 128 pages */
-	return 128 * PAGE_SIZE;
-}
-
-/**
- * userui_update_status - Update the progress bar and (if on) in-bar message.
- *
- * @value: Current progress percentage numerator.
- * @maximum: Current progress percentage denominator.
- * @fmt: Message to be displayed in the middle of the progress bar.
- *
- * Note that a NULL message does not mean that any previous message is erased!
- * For that, you need toi_prepare_status with clearbar on.
- *
- * Returns an unsigned long, being the next numerator (as determined by the
- * maximum and progress granularity) where status needs to be updated.
- * This is to reduce unnecessary calls to update_status.
- */
-static u32 userui_update_status(u32 value, u32 maximum, const char *fmt, ...)
-{
-	static u32 last_step = 9999;
-	struct userui_msg_params msg;
-	u32 this_step, next_update;
-	int bitshift;
-
-	if (ui_helper_data.pid == -1)
-		return 0;
-
-	if ((!maximum) || (!progress_granularity))
-		return maximum;
-
-	if (value < 0)
-		value = 0;
-
-	if (value > maximum)
-		value = maximum;
-
-	/* Try to avoid math problems - we can't do 64 bit math here
-	 * (and shouldn't need it - anyone got screen resolution
-	 * of 65536 pixels or more?) */
-	bitshift = fls(maximum) - 16;
-	if (bitshift > 0) {
-		u32 temp_maximum = maximum >> bitshift;
-		u32 temp_value = value >> bitshift;
-		this_step = (u32)
-			(temp_value * progress_granularity / temp_maximum);
-		next_update = (((this_step + 1) * temp_maximum /
-					progress_granularity) + 1) << bitshift;
-	} else {
-		this_step = (u32) (value * progress_granularity / maximum);
-		next_update = ((this_step + 1) * maximum /
-				progress_granularity) + 1;
-	}
-
-	if (this_step == last_step)
-		return next_update;
-
-	memset(&msg, 0, sizeof(msg));
-
-	msg.a = this_step;
-	msg.b = progress_granularity;
-
-	if (fmt) {
-		va_list args;
-		va_start(args, fmt);
-		vsnprintf(msg.text, sizeof(msg.text), fmt, args);
-		va_end(args);
-		msg.text[sizeof(msg.text)-1] = '\0';
-	}
-
-	toi_send_netlink_message(&ui_helper_data, USERUI_MSG_PROGRESS,
-			&msg, sizeof(msg));
-	last_step = this_step;
-
-	return next_update;
-}
-
-/**
- * userui_message - Display a message without necessarily logging it.
- *
- * @section: Type of message. Messages can be filtered by type.
- * @level: Degree of importance of the message. Lower values = higher priority.
- * @normally_logged: Whether logged even if log_everything is off.
- * @fmt: Message (and parameters).
- *
- * This function is intended to do the same job as printk, but without normally
- * logging what is printed. The point is to be able to get debugging info on
- * screen without filling the logs with "1/534. ^M 2/534^M. 3/534^M"
- *
- * It may be called from an interrupt context - can't sleep!
- */
-static void userui_message(u32 section, u32 level, u32 normally_logged,
-		const char *fmt, ...)
-{
-	struct userui_msg_params msg;
-
-	if ((level) && (level > console_loglevel))
-		return;
-
-	memset(&msg, 0, sizeof(msg));
-
-	msg.a = section;
-	msg.b = level;
-	msg.c = normally_logged;
-
-	if (fmt) {
-		va_list args;
-		va_start(args, fmt);
-		vsnprintf(msg.text, sizeof(msg.text), fmt, args);
-		va_end(args);
-		msg.text[sizeof(msg.text)-1] = '\0';
-	}
-
-	if (test_action_state(TOI_LOGALL))
-		printk(KERN_INFO "%s\n", msg.text);
-
-	toi_send_netlink_message(&ui_helper_data, USERUI_MSG_MESSAGE,
-			&msg, sizeof(msg));
-}
-
-/**
- * wait_for_key_via_userui - Wait for userui to receive a keypress.
- */
-static void wait_for_key_via_userui(void)
-{
-	DECLARE_WAITQUEUE(wait, current);
-
-	add_wait_queue(&userui_wait_for_key, &wait);
-	set_current_state(TASK_INTERRUPTIBLE);
-
-	wait_event_interruptible(userui_wait_for_key, userui_wait_should_wake);
-	userui_wait_should_wake = false;
-
-	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&userui_wait_for_key, &wait);
-}
-
-/**
- * userui_prepare_status - Display high level messages.
- *
- * @clearbar: Whether to clear the progress bar.
- * @fmt...: New message for the title.
- *
- * Prepare the 'nice display', drawing the header and version, along with the
- * current action and perhaps also resetting the progress bar.
- */
-static void userui_prepare_status(int clearbar, const char *fmt, ...)
-{
-	va_list args;
-
-	if (fmt) {
-		va_start(args, fmt);
-		lastheader_message_len = vsnprintf(lastheader, 512, fmt, args);
-		va_end(args);
-	}
-
-	if (clearbar)
-		toi_update_status(0, 1, NULL);
-
-	if (ui_helper_data.pid == -1)
-		printk(KERN_EMERG "%s\n", lastheader);
-	else
-		toi_message(0, TOI_STATUS, 1, lastheader, NULL);
-}
-
-/**
- * toi_wait_for_keypress - Wait for keypress via userui.
- *
- * @timeout: Maximum time to wait.
- *
- * Wait for a keypress from userui.
- *
- * FIXME: Implement timeout?
- */
-static char userui_wait_for_keypress(int timeout)
-{
-	char key = '\0';
-
-	if (ui_helper_data.pid != -1) {
-		wait_for_key_via_userui();
-		key = ' ';
-	}
-
-	return key;
-}
-
-/**
- * userui_abort_hibernate - Abort a cycle & tell user if they didn't request it.
- *
- * @result_code: Reason why we're aborting (1 << bit).
- * @fmt: Message to display if telling the user what's going on.
- *
- * Abort a cycle. If this wasn't at the user's request (and we're displaying
- * output), tell the user why and wait for them to acknowledge the message.
- */
-static void userui_abort_hibernate(int result_code, const char *fmt, ...)
-{
-	va_list args;
-	int printed_len = 0;
-
-	set_result_state(result_code);
-
-	if (test_result_state(TOI_ABORTED))
-		return;
-
-	set_result_state(TOI_ABORTED);
-
-	if (test_result_state(TOI_ABORT_REQUESTED))
-		return;
-
-	va_start(args, fmt);
-	printed_len = vsnprintf(local_printf_buf,  sizeof(local_printf_buf),
-			fmt, args);
-	va_end(args);
-	if (ui_helper_data.pid != -1)
-		printed_len = sprintf(local_printf_buf + printed_len,
-					" (Press SPACE to continue)");
-
-	toi_prepare_status(CLEAR_BAR, "%s", local_printf_buf);
-
-	if (ui_helper_data.pid != -1)
-		userui_wait_for_keypress(0);
-}
-
-/**
- * request_abort_hibernate - Abort hibernating or resuming at user request.
- *
- * Handle the user requesting the cancellation of a hibernation or resume by
- * pressing escape.
- */
-static void request_abort_hibernate(void)
-{
-	if (test_result_state(TOI_ABORT_REQUESTED) ||
-	   !test_action_state(TOI_CAN_CANCEL))
-		return;
-
-	if (test_toi_state(TOI_NOW_RESUMING)) {
-		toi_prepare_status(CLEAR_BAR, "Escape pressed. "
-					"Powering down again.");
-		set_toi_state(TOI_STOP_RESUME);
-		while (!test_toi_state(TOI_IO_STOPPED))
-			schedule();
-		if (toiActiveAllocator->mark_resume_attempted)
-			toiActiveAllocator->mark_resume_attempted(0);
-		toi_power_down();
-	}
-
-	toi_prepare_status(CLEAR_BAR, "--- ESCAPE PRESSED :"
-					" ABORTING HIBERNATION ---");
-	set_abort_result(TOI_ABORT_REQUESTED);
-	toi_stop_waiting_for_userui_key();
-}
-
-/**
- * userui_user_rcv_msg - Receive a netlink message from userui.
- *
- * @skb: skb received.
- * @nlh: Netlink header received.
- */
-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 (!capable(CAP_NET_ADMIN))
-		return -EPERM;
-
-	/* Only allow one task to receive NOFREEZE privileges */
-	if (type == NETLINK_MSG_NOFREEZE_ME && ui_helper_data.pid != -1) {
-		printk(KERN_INFO "Got NOFREEZE_ME request when "
-			"ui_helper_data.pid is %d.\n", ui_helper_data.pid);
-		return -EBUSY;
-	}
-
-	data = (int *) NLMSG_DATA(nlh);
-
-	switch (type) {
-	case USERUI_MSG_ABORT:
-		request_abort_hibernate();
-		return 0;
-	case USERUI_MSG_GET_STATE:
-		toi_send_netlink_message(&ui_helper_data,
-				USERUI_MSG_GET_STATE, &toi_bkd.toi_action,
-				sizeof(toi_bkd.toi_action));
-		return 0;
-	case USERUI_MSG_GET_DEBUG_STATE:
-		toi_send_netlink_message(&ui_helper_data,
-				USERUI_MSG_GET_DEBUG_STATE,
-				&toi_bkd.toi_debug_state,
-				sizeof(toi_bkd.toi_debug_state));
-		return 0;
-	case USERUI_MSG_SET_STATE:
-		if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(int)))
-			return -EINVAL;
-		ui_nl_set_state(*data);
-		return 0;
-	case USERUI_MSG_SET_DEBUG_STATE:
-		if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(int)))
-			return -EINVAL;
-		toi_bkd.toi_debug_state = (*data);
-		return 0;
-	case USERUI_MSG_SPACE:
-		toi_stop_waiting_for_userui_key();
-		return 0;
-	case USERUI_MSG_GET_POWERDOWN_METHOD:
-		toi_send_netlink_message(&ui_helper_data,
-				USERUI_MSG_GET_POWERDOWN_METHOD,
-				&toi_poweroff_method,
-				sizeof(toi_poweroff_method));
-		return 0;
-	case USERUI_MSG_SET_POWERDOWN_METHOD:
-		if (nlh->nlmsg_len != NLMSG_LENGTH(sizeof(char)))
-			return -EINVAL;
-		toi_poweroff_method = (unsigned long)(*data);
-		return 0;
-	case USERUI_MSG_GET_LOGLEVEL:
-		toi_send_netlink_message(&ui_helper_data,
-				USERUI_MSG_GET_LOGLEVEL,
-				&toi_bkd.toi_default_console_level,
-				sizeof(toi_bkd.toi_default_console_level));
-		return 0;
-	case USERUI_MSG_SET_LOGLEVEL:
-		if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(int)))
-			return -EINVAL;
-		toi_bkd.toi_default_console_level = (*data);
-		return 0;
-	case USERUI_MSG_PRINTK:
-		printk(KERN_INFO "%s", (char *) data);
-		return 0;
-	}
-
-	/* Unhandled here */
-	return 1;
-}
-
-/**
- * userui_cond_pause - Possibly pause at user request.
- *
- * @pause: Whether to pause or just display the message.
- * @message: Message to display at the start of pausing.
- *
- * Potentially pause and wait for the user to tell us to continue. We normally
- * only pause when @pause is set. While paused, the user can do things like
- * changing the loglevel, toggling the display of debugging sections and such
- * like.
- */
-static void userui_cond_pause(int pause, char *message)
-{
-	int displayed_message = 0, last_key = 0;
-
-	while (last_key != 32 &&
-		ui_helper_data.pid != -1 &&
-		((test_action_state(TOI_PAUSE) && pause) ||
-		 (test_action_state(TOI_SINGLESTEP)))) {
-		if (!displayed_message) {
-			toi_prepare_status(DONT_CLEAR_BAR,
-			   "%s Press SPACE to continue.%s",
-			   message ? message : "",
-			   (test_action_state(TOI_SINGLESTEP)) ?
-			   " Single step on." : "");
-			displayed_message = 1;
-		}
-		last_key = userui_wait_for_keypress(0);
-	}
-	schedule();
-}
-
-/**
- * userui_prepare_console - Prepare the console for use.
- *
- * Prepare a console for use, saving current kmsg settings and attempting to
- * start userui. Console loglevel changes are handled by userui.
- */
-static void userui_prepare_console(void)
-{
-	orig_kmsg = vt_kmsg_redirect(fg_console + 1);
-
-	ui_helper_data.pid = -1;
-
-	if (!userui_ops.enabled) {
-		printk(KERN_INFO "TuxOnIce: Userui disabled.\n");
-		return;
-	}
-
-	if (*ui_helper_data.program)
-		toi_netlink_setup(&ui_helper_data);
-	else
-		printk(KERN_INFO "TuxOnIce: Userui program not configured.\n");
-}
-
-/**
- * userui_cleanup_console - Cleanup after a cycle.
- *
- * Tell userui to cleanup, and restore kmsg_redirect to its original value.
- */
-
-static void userui_cleanup_console(void)
-{
-	if (ui_helper_data.pid > -1)
-		toi_netlink_close(&ui_helper_data);
-
-	vt_kmsg_redirect(orig_kmsg);
-}
-
-/*
- * User interface specific /sys/power/tuxonice entries.
- */
-
-static struct toi_sysfs_data sysfs_params[] = {
-#if defined(CONFIG_NET) && defined(CONFIG_SYSFS)
-	SYSFS_BIT("enable_escape", SYSFS_RW, &toi_bkd.toi_action,
-			TOI_CAN_CANCEL, 0),
-	SYSFS_BIT("pause_between_steps", SYSFS_RW, &toi_bkd.toi_action,
-			TOI_PAUSE, 0),
-	SYSFS_INT("enabled", SYSFS_RW, &userui_ops.enabled, 0, 1, 0, NULL),
-	SYSFS_INT("progress_granularity", SYSFS_RW, &progress_granularity, 1,
-			2048, 0, NULL),
-	SYSFS_STRING("program", SYSFS_RW, ui_helper_data.program, 255, 0,
-			set_ui_program_set),
-	SYSFS_INT("debug", SYSFS_RW, &ui_helper_data.debug, 0, 1, 0, NULL)
-#endif
-};
-
-static struct toi_module_ops userui_ops = {
-	.type				= MISC_MODULE,
-	.name				= "userui",
-	.shared_directory		= "user_interface",
-	.module				= THIS_MODULE,
-	.storage_needed			= userui_storage_needed,
-	.save_config_info		= userui_save_config_info,
-	.load_config_info		= userui_load_config_info,
-	.memory_needed			= userui_memory_needed,
-	.post_atomic_restore		= userui_post_atomic_restore,
-	.sysfs_data			= sysfs_params,
-	.num_sysfs_entries		= sizeof(sysfs_params) /
-		sizeof(struct toi_sysfs_data),
-};
-
-static struct ui_ops my_ui_ops = {
-	.update_status			= userui_update_status,
-	.message			= userui_message,
-	.prepare_status			= userui_prepare_status,
-	.abort				= userui_abort_hibernate,
-	.cond_pause			= userui_cond_pause,
-	.prepare			= userui_prepare_console,
-	.cleanup			= userui_cleanup_console,
-	.wait_for_key			= userui_wait_for_keypress,
-};
-
-/**
- * toi_user_ui_init - Boot time initialisation for user interface.
- *
- * Invoked from the core init routine.
- */
-static __init int toi_user_ui_init(void)
-{
-	int result;
-
-	ui_helper_data.nl = NULL;
-	strncpy(ui_helper_data.program, CONFIG_TOI_USERUI_DEFAULT_PATH, 255);
-	ui_helper_data.pid = -1;
-	ui_helper_data.skb_size = sizeof(struct userui_msg_params);
-	ui_helper_data.pool_limit = 6;
-	ui_helper_data.netlink_id = NETLINK_TOI_USERUI;
-	ui_helper_data.name = "userspace ui";
-	ui_helper_data.rcv_msg = userui_user_rcv_msg;
-	ui_helper_data.interface_version = 8;
-	ui_helper_data.must_init = 0;
-	ui_helper_data.not_ready = userui_cleanup_console;
-	init_completion(&ui_helper_data.wait_for_process);
-	result = toi_register_module(&userui_ops);
-        if (!result) {
-          result = toi_register_ui_ops(&my_ui_ops);
-          if (result)
-            toi_unregister_module(&userui_ops);
-        }
-
-	return result;
-}
-
-late_initcall(toi_user_ui_init);