[PATCH] [28/48] Suspend2 2.1.9.8 for 2.6.12: 605-kernel_power_suspend.patch

Nigel Cunningham
2005-07-06T03:01:34Z

diff -ruNp 606-all-settings.patch-old/kernel/power/suspend2_core/all_settings.c 606-all-settings.patch-new/kernel/power/suspend2_core/all_settings.c
--- 606-all-settings.patch-old/kernel/power/suspend2_core/all_settings.c 1970-01-01 10:00:00.000000000 +1000
+++ 606-all-settings.patch-new/kernel/power/suspend2_core/all_settings.c 2005-07-04 23:14:19.000000000 +1000
@@ -0,0 +1,325 @@
+/*
+ * /kernel/power/suspend2_core/all_settings.c
+ *
+ * Suspend2 is released under the GPLv2.
+ *
+ * Copyright (C) 2002-2005 Nigel Cunningham <nigel@suspend2.net>
+ *
+ * This file provides the all_settings proc entry, used to save
+ * and restore all suspend2 settings en masse.
+ */
+
+#include <linux/mm.h>
+#include <linux/suspend.h>
+#include <asm/uaccess.h>
+
+#include "plugins.h"
+#include "proc.h"
+#include "suspend2_common.h"
+#include "prepare_image.h"
+#include "power_off.h"
+#include "io.h"
+
+#define ALL_SETTINGS_VERSION 4
+
+static int resume2_len;
+
+/*
+ * suspend_write2_compat_proc.
+ *
+ * This entry allows all of the settings to be set at once.
+ * It was originally for compatibility with pre- /proc/suspend
+ * versions, but has been retained because it makes saving and
+ * restoring the configuration simpler.
+ */
+static int suspend2_write_compat_proc(struct file *file, const char * buffer,
+ unsigned long count, void * data)
+{
+ char * buf1 = (char *) get_zeroed_page(GFP_ATOMIC), *curbuf, *lastbuf;
+ char * buf2 = (char *) get_zeroed_page(GFP_ATOMIC);
+ int i, file_offset = 0, used_size = 0, reparse_resume_device = 0;
+ unsigned long nextval;
+ struct suspend_plugin_ops * plugin;
+ struct plugin_header * plugin_header = NULL;
+ int version_applying = 0;
+
+ if ((!buf1) || (!buf2)) {
+ count = -ENOMEM;
+ goto out2;
+ }
+
+ while (file_offset < count) {
+ int length = count - file_offset;
+ if (length > (PAGE_SIZE - used_size))
+ length = PAGE_SIZE - used_size;
+
+ if (copy_from_user(buf1 + used_size, buffer + file_offset, length)) {
+ count = -EFAULT;
+ goto out2;
+ }
+
+ curbuf = buf1;
+
+ if (!file_offset) {
+ /* Integers first */
+ for (i = 0; i < 8; i++) {
+ if (!*curbuf)
+ break;
+ lastbuf = curbuf;
+ nextval = simple_strtoul(curbuf, &curbuf, 0);
+ if (curbuf == lastbuf)
+ break;
+ switch (i) {
+ case 0:
+ version_applying = nextval;
+ if (nextval < 3) {
+ printk("Error loading saved settings. This data is for version %ld, but kernel module supports format 3 or later.\n",
+ nextval);
+ goto out2;
+ }
+ case 1:
+ suspend_result = nextval;
+ break;
+ case 2:
+ suspend_action = nextval;
+ break;
+ case 3:
+#ifdef CONFIG_PM_DEBUG
+ suspend_debug_state = nextval;
+#endif
+ break;
+ case 4:
+ suspend_default_console_level = nextval;
+#ifndef CONFIG_PM_DEBUG
+ if (suspend_default_console_level > 1)
+ suspend_default_console_level = 1;
+#endif
+ break;
+ case 5:
+ image_size_limit = nextval;
+ break;
+ case 6:
+#ifdef CONFIG_ACPI
+ suspend2_powerdown_method = nextval;
+ if (suspend2_powerdown_method < 3)
+ suspend2_powerdown_method = 3;
+ if (suspend2_powerdown_method > 5)
+#endif
+ suspend2_powerdown_method = 5;
+ break;
+ case 7:
+ resume2_len = nextval;
+ }
+
+ curbuf++;
+ while (*curbuf == ' ')
+ curbuf++;
+
+ if (version_applying == 3 && i == 7)
+ break;
+ }
+
+ if (count <= (curbuf - buf1))
+ goto out;
+ else {
+ list_for_each_entry(plugin, &suspend_plugins, plugin_list)
+ plugin->disabled = 1;
+ }
+
+ if (version_applying > 3) {
+ /* Resume2.
+ *
+ * Since the integers will be short and resume2 is 255 chars max,
+ * there's no danger of buffer overflow.
+ */
+ strncpy(resume2_file, curbuf, resume2_len);
+ curbuf += resume2_len + 1;
+ }
+ }
+
+ if (((unsigned long) curbuf & ~PAGE_MASK) + sizeof(plugin_header) > PAGE_SIZE)
+ goto shift_buffer;
+
+ /* Plugins */
+ plugin_header = (struct plugin_header *) curbuf;
+
+ if (((unsigned long) curbuf & ~PAGE_MASK) + sizeof(plugin_header) + plugin_header->data_length > PAGE_SIZE)
+ goto shift_buffer;
+
+ if (plugin_header->signature != 0xADEDC0DE) {
+ printk("Bad plugin data signature.\n");
+ break;
+ }
+
+ plugin = find_plugin_given_name(plugin_header->name);
+
+ if (plugin) { /* May validly have config saved for a plugin not now loaded */
+ if ((plugin->type == WRITER_PLUGIN) &&
+ ((!active_writer && plugin->disabled && !plugin_header->disabled) ||
+ (active_writer == plugin && plugin_header->disabled)))
+ reparse_resume_device = 1;
+ plugin->disabled = plugin_header->disabled;
+ if (plugin_header->data_length)
+ plugin->load_config_info(curbuf + sizeof(struct plugin_header),
+ plugin_header->data_length);
+ } else
+ printk("Data for plugin %s not used because not currently loaded.\n", plugin_header->name);
+
+ curbuf += sizeof(struct plugin_header) + plugin_header->data_length;
+
+shift_buffer:
+ if (!(curbuf - buf1))
+ break;
+
+ file_offset += curbuf - buf1;
+
+ used_size = PAGE_SIZE + buf1 - curbuf;
+ memcpy(buf2, curbuf, used_size);
+ memcpy(buf1, buf2, used_size);
+ }
+out:
+ attempt_to_parse_resume_device();
+
+out2:
+ if (buf1)
+ free_pages((unsigned long) buf1, 0);
+
+ if (buf2)
+ free_pages((unsigned long) buf2, 0);
+
+ return count;
+}
+
+/*
+ * suspend2_read_compat_proc.
+ *
+ * Like its sibling, this entry allows all of the settings
+ * to be read at once.
+ * It too was originally for compatibility with pre- /proc/suspend
+ * versions, but has been retained because it makes saving and
+ * restoring the configuration simpler.
+ */
+static int suspend2_read_compat_proc(char * page, char ** start, off_t off, int count,
+ int *eof, void *data)
+{
+ struct suspend_plugin_ops * this_plugin;
+ char * buffer = (char *) get_zeroed_page(GFP_ATOMIC);
+ int index = 1, file_pos = 0, page_offset = 0, len;
+ int copy_len = 0;
+ struct plugin_header plugin_header;
+
+ if (!buffer) {
+ printk("Failed to allocate a buffer for getting "
+ "plugin configuration info.\n");
+ return -ENOMEM;
+ }
+
+ plugin_header.signature = 0xADEDC0DE;
+
+ len = sprintf(buffer, "%d %ld %ld %ld %d %d %ld %d %s\n",
+ ALL_SETTINGS_VERSION,
+ suspend_result,
+ suspend_action,
+ suspend_debug_state,
+ suspend_default_console_level,
+ image_size_limit,
+ suspend2_powerdown_method,
+ strlen(resume2_file),
+ resume2_file);
+
+ if (len >= off) {
+ copy_len = (len < off + count) ? len - off : count - off;
+ memcpy(page, buffer + off, copy_len);
+ page_offset+= copy_len;
+ }
+
+ file_pos += len;
+
+ /*
+ * We have to know which data goes with which plugin, so we at
+ * least write a length of zero for a plugin. Note that we are
+ * also assuming every plugin's config data takes <= PAGE_SIZE.
+ */
+
+ /* For each plugin (in registration order) */
+ list_for_each_entry(this_plugin, &suspend_plugins, plugin_list) {
+
+ /* Get the data from the plugin */
+ if (this_plugin->save_config_info) {
+ plugin_header.data_length = this_plugin->save_config_info(buffer);
+ } else
+ plugin_header.data_length = 0;
+
+ if (file_pos > (off + count)) {
+ file_pos += sizeof(struct plugin_header) + plugin_header.data_length;
+ continue;
+ }
+
+ len = 0;
+ if ((file_pos + sizeof(struct plugin_header) >= off) &&
+ (file_pos < (off + count))) {
+
+ /* Save the details of the plugin */
+ memcpy(plugin_header.name, this_plugin->name,
+ SUSPEND_MAX_PLUGIN_NAME_LENGTH);
+ plugin_header.disabled = this_plugin->disabled;
+ plugin_header.type = this_plugin->type;
+ plugin_header.index = index++;
+
+ copy_len = sizeof(struct plugin_header);
+
+ if (copy_len + page_offset > count)
+ copy_len = count - page_offset;
+
+ memcpy(page + page_offset,
+ ((char *) &plugin_header) + off + page_offset - file_pos,
+ copy_len);
+
+ page_offset += copy_len;
+ }
+
+ file_pos += sizeof(struct plugin_header);
+
+ if (plugin_header.data_length && (file_pos >= off) && (file_pos < (off + count))) {
+ copy_len = plugin_header.data_length;
+
+ if (copy_len + page_offset > count + off)
+ copy_len = count - page_offset;
+
+ memcpy(page + page_offset,
+ buffer,
+ copy_len);
+
+ page_offset += copy_len;
+
+ }
+
+ file_pos += plugin_header.data_length;
+
+ }
+ free_pages((unsigned long) buffer, 0);
+ if (page_offset < count)
+ *eof = 1;
+ return page_offset;
+}
+
+static struct suspend_proc_data proc_params =
+ { .filename = "all_settings",
+ .permissions = PROC_RW,
+ .type = SUSPEND_PROC_DATA_CUSTOM,
+ .data = {
+ .special = {
+ .read_proc = suspend2_read_compat_proc,
+ .write_proc = suspend2_write_compat_proc,
+ }
+ }
+ }
+;
+
+/* Create the entry when we boot. */
+__init int suspend2_all_settings_proc_init(void)
+{
+ suspend_register_procfile(&proc_params);
+ return 0;
+}
+late_initcall(suspend2_all_settings_proc_init);