diff options
Diffstat (limited to 'kernel/power/tuxonice_modules.c')
| -rw-r--r-- | kernel/power/tuxonice_modules.c | 520 |
1 files changed, 0 insertions, 520 deletions
diff --git a/kernel/power/tuxonice_modules.c b/kernel/power/tuxonice_modules.c deleted file mode 100644 index a203c8fb9..000000000 --- a/kernel/power/tuxonice_modules.c +++ /dev/null @@ -1,520 +0,0 @@ -/* - * kernel/power/tuxonice_modules.c - * - * Copyright (C) 2004-2015 Nigel Cunningham (nigel at nigelcunningham com au) - * - */ - -#include <linux/suspend.h> -#include <linux/module.h> -#include "tuxonice.h" -#include "tuxonice_modules.h" -#include "tuxonice_sysfs.h" -#include "tuxonice_ui.h" - -LIST_HEAD(toi_filters); -LIST_HEAD(toiAllocators); - -LIST_HEAD(toi_modules); - -struct toi_module_ops *toiActiveAllocator; - -static int toi_num_filters; -int toiNumAllocators, toi_num_modules; - -/* - * toi_header_storage_for_modules - * - * Returns the amount of space needed to store configuration - * data needed by the modules prior to copying back the original - * kernel. We can exclude data for pageset2 because it will be - * available anyway once the kernel is copied back. - */ -long toi_header_storage_for_modules(void) -{ - struct toi_module_ops *this_module; - int bytes = 0; - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (!this_module->enabled || - (this_module->type == WRITER_MODULE && - toiActiveAllocator != this_module)) - continue; - if (this_module->storage_needed) { - int this = this_module->storage_needed() + - sizeof(struct toi_module_header) + - sizeof(int); - this_module->header_requested = this; - bytes += this; - } - } - - /* One more for the empty terminator */ - return bytes + sizeof(struct toi_module_header); -} - -void print_toi_header_storage_for_modules(void) -{ - struct toi_module_ops *this_module; - int bytes = 0; - - printk(KERN_DEBUG "Header storage:\n"); - list_for_each_entry(this_module, &toi_modules, module_list) { - if (!this_module->enabled || - (this_module->type == WRITER_MODULE && - toiActiveAllocator != this_module)) - continue; - if (this_module->storage_needed) { - int this = this_module->storage_needed() + - sizeof(struct toi_module_header) + - sizeof(int); - this_module->header_requested = this; - bytes += this; - printk(KERN_DEBUG "+ %16s : %-4d/%d.\n", - this_module->name, - this_module->header_used, this); - } - } - - printk(KERN_DEBUG "+ empty terminator : %zu.\n", - sizeof(struct toi_module_header)); - printk(KERN_DEBUG " ====\n"); - printk(KERN_DEBUG " %zu\n", - bytes + sizeof(struct toi_module_header)); -} - -/* - * toi_memory_for_modules - * - * Returns the amount of memory requested by modules for - * doing their work during the cycle. - */ - -long toi_memory_for_modules(int print_parts) -{ - long bytes = 0, result; - struct toi_module_ops *this_module; - - if (print_parts) - printk(KERN_INFO "Memory for modules:\n===================\n"); - list_for_each_entry(this_module, &toi_modules, module_list) { - int this; - if (!this_module->enabled) - continue; - if (this_module->memory_needed) { - this = this_module->memory_needed(); - if (print_parts) - printk(KERN_INFO "%10d bytes (%5ld pages) for " - "module '%s'.\n", this, - DIV_ROUND_UP(this, PAGE_SIZE), - this_module->name); - bytes += this; - } - } - - result = DIV_ROUND_UP(bytes, PAGE_SIZE); - if (print_parts) - printk(KERN_INFO " => %ld bytes, %ld pages.\n", bytes, result); - - return result; -} - -/* - * toi_expected_compression_ratio - * - * Returns the compression ratio expected when saving the image. - */ - -int toi_expected_compression_ratio(void) -{ - int ratio = 100; - struct toi_module_ops *this_module; - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (!this_module->enabled) - continue; - if (this_module->expected_compression) - ratio = ratio * this_module->expected_compression() - / 100; - } - - return ratio; -} - -/* toi_find_module_given_dir - * Functionality : Return a module (if found), given a pointer - * to its directory name - */ - -static struct toi_module_ops *toi_find_module_given_dir(char *name) -{ - struct toi_module_ops *this_module, *found_module = NULL; - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (!strcmp(name, this_module->directory)) { - found_module = this_module; - break; - } - } - - return found_module; -} - -/* toi_find_module_given_name - * Functionality : Return a module (if found), given a pointer - * to its name - */ - -struct toi_module_ops *toi_find_module_given_name(char *name) -{ - struct toi_module_ops *this_module, *found_module = NULL; - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (!strcmp(name, this_module->name)) { - found_module = this_module; - break; - } - } - - return found_module; -} - -/* - * toi_print_module_debug_info - * Functionality : Get debugging info from modules into a buffer. - */ -int toi_print_module_debug_info(char *buffer, int buffer_size) -{ - struct toi_module_ops *this_module; - int len = 0; - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (!this_module->enabled) - continue; - if (this_module->print_debug_info) { - int result; - result = this_module->print_debug_info(buffer + len, - buffer_size - len); - len += result; - } - } - - /* Ensure null terminated */ - buffer[buffer_size] = 0; - - return len; -} - -/* - * toi_register_module - * - * Register a module. - */ -int toi_register_module(struct toi_module_ops *module) -{ - int i; - struct kobject *kobj; - - if (!hibernation_available()) - return -ENODEV; - - module->enabled = 1; - - if (toi_find_module_given_name(module->name)) { - printk(KERN_INFO "TuxOnIce: Trying to load module %s," - " which is already registered.\n", - module->name); - return -EBUSY; - } - - switch (module->type) { - case FILTER_MODULE: - list_add_tail(&module->type_list, &toi_filters); - toi_num_filters++; - break; - case WRITER_MODULE: - list_add_tail(&module->type_list, &toiAllocators); - toiNumAllocators++; - break; - case MISC_MODULE: - case MISC_HIDDEN_MODULE: - case BIO_ALLOCATOR_MODULE: - break; - default: - printk(KERN_ERR "Hmmm. Module '%s' has an invalid type." - " It has been ignored.\n", module->name); - return -EINVAL; - } - list_add_tail(&module->module_list, &toi_modules); - toi_num_modules++; - - if ((!module->directory && !module->shared_directory) || - !module->sysfs_data || !module->num_sysfs_entries) - return 0; - - /* - * Modules may share a directory, but those with shared_dir - * set must be loaded (via symbol dependencies) after parents - * and unloaded beforehand. - */ - if (module->shared_directory) { - struct toi_module_ops *shared = - toi_find_module_given_dir(module->shared_directory); - if (!shared) { - printk(KERN_ERR "TuxOnIce: Module %s wants to share " - "%s's directory but %s isn't loaded.\n", - module->name, module->shared_directory, - module->shared_directory); - toi_unregister_module(module); - return -ENODEV; - } - kobj = shared->dir_kobj; - } else { - if (!strncmp(module->directory, "[ROOT]", 6)) - kobj = tuxonice_kobj; - else - kobj = make_toi_sysdir(module->directory); - } - module->dir_kobj = kobj; - for (i = 0; i < module->num_sysfs_entries; i++) { - int result = toi_register_sysfs_file(kobj, - &module->sysfs_data[i]); - if (result) - return result; - } - return 0; -} - -/* - * toi_unregister_module - * - * Remove a module. - */ -void toi_unregister_module(struct toi_module_ops *module) -{ - int i; - - if (module->dir_kobj) - for (i = 0; i < module->num_sysfs_entries; i++) - toi_unregister_sysfs_file(module->dir_kobj, - &module->sysfs_data[i]); - - if (!module->shared_directory && module->directory && - strncmp(module->directory, "[ROOT]", 6)) - remove_toi_sysdir(module->dir_kobj); - - switch (module->type) { - case FILTER_MODULE: - list_del(&module->type_list); - toi_num_filters--; - break; - case WRITER_MODULE: - list_del(&module->type_list); - toiNumAllocators--; - if (toiActiveAllocator == module) { - toiActiveAllocator = NULL; - clear_toi_state(TOI_CAN_RESUME); - clear_toi_state(TOI_CAN_HIBERNATE); - } - break; - case MISC_MODULE: - case MISC_HIDDEN_MODULE: - case BIO_ALLOCATOR_MODULE: - break; - default: - printk(KERN_ERR "Module '%s' has an invalid type." - " It has been ignored.\n", module->name); - return; - } - list_del(&module->module_list); - toi_num_modules--; -} - -/* - * toi_move_module_tail - * - * Rearrange modules when reloading the config. - */ -void toi_move_module_tail(struct toi_module_ops *module) -{ - switch (module->type) { - case FILTER_MODULE: - if (toi_num_filters > 1) - list_move_tail(&module->type_list, &toi_filters); - break; - case WRITER_MODULE: - if (toiNumAllocators > 1) - list_move_tail(&module->type_list, &toiAllocators); - break; - case MISC_MODULE: - case MISC_HIDDEN_MODULE: - case BIO_ALLOCATOR_MODULE: - break; - default: - printk(KERN_ERR "Module '%s' has an invalid type." - " It has been ignored.\n", module->name); - return; - } - if ((toi_num_filters + toiNumAllocators) > 1) - list_move_tail(&module->module_list, &toi_modules); -} - -/* - * toi_initialise_modules - * - * Get ready to do some work! - */ -int toi_initialise_modules(int starting_cycle, int early) -{ - struct toi_module_ops *this_module; - int result; - - list_for_each_entry(this_module, &toi_modules, module_list) { - this_module->header_requested = 0; - this_module->header_used = 0; - if (!this_module->enabled) - continue; - if (this_module->early != early) - continue; - if (this_module->initialise) { - result = this_module->initialise(starting_cycle); - if (result) { - toi_cleanup_modules(starting_cycle); - return result; - } - this_module->initialised = 1; - } - } - - return 0; -} - -/* - * toi_cleanup_modules - * - * Tell modules the work is done. - */ -void toi_cleanup_modules(int finishing_cycle) -{ - struct toi_module_ops *this_module; - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (!this_module->enabled || !this_module->initialised) - continue; - if (this_module->cleanup) - this_module->cleanup(finishing_cycle); - this_module->initialised = 0; - } -} - -/* - * toi_pre_atomic_restore_modules - * - * Get ready to do some work! - */ -void toi_pre_atomic_restore_modules(struct toi_boot_kernel_data *bkd) -{ - struct toi_module_ops *this_module; - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (this_module->enabled && this_module->pre_atomic_restore) - this_module->pre_atomic_restore(bkd); - } -} - -/* - * toi_post_atomic_restore_modules - * - * Get ready to do some work! - */ -void toi_post_atomic_restore_modules(struct toi_boot_kernel_data *bkd) -{ - struct toi_module_ops *this_module; - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (this_module->enabled && this_module->post_atomic_restore) - this_module->post_atomic_restore(bkd); - } -} - -/* - * toi_get_next_filter - * - * Get the next filter in the pipeline. - */ -struct toi_module_ops *toi_get_next_filter(struct toi_module_ops *filter_sought) -{ - struct toi_module_ops *last_filter = NULL, *this_filter = NULL; - - list_for_each_entry(this_filter, &toi_filters, type_list) { - if (!this_filter->enabled) - continue; - if ((last_filter == filter_sought) || (!filter_sought)) - return this_filter; - last_filter = this_filter; - } - - return toiActiveAllocator; -} - -/** - * toi_show_modules: Printk what support is loaded. - */ -void toi_print_modules(void) -{ - struct toi_module_ops *this_module; - int prev = 0; - - printk(KERN_INFO "TuxOnIce " TOI_CORE_VERSION ", with support for"); - - list_for_each_entry(this_module, &toi_modules, module_list) { - if (this_module->type == MISC_HIDDEN_MODULE) - continue; - printk("%s %s%s%s", prev ? "," : "", - this_module->enabled ? "" : "[", - this_module->name, - this_module->enabled ? "" : "]"); - prev = 1; - } - - printk(".\n"); -} - -/* toi_get_modules - * - * Take a reference to modules so they can't go away under us. - */ - -int toi_get_modules(void) -{ - struct toi_module_ops *this_module; - - list_for_each_entry(this_module, &toi_modules, module_list) { - struct toi_module_ops *this_module2; - - if (try_module_get(this_module->module)) - continue; - - /* Failed! Reverse gets and return error */ - list_for_each_entry(this_module2, &toi_modules, - module_list) { - if (this_module == this_module2) - return -EINVAL; - module_put(this_module2->module); - } - } - return 0; -} - -/* toi_put_modules - * - * Release our references to modules we used. - */ - -void toi_put_modules(void) -{ - struct toi_module_ops *this_module; - - list_for_each_entry(this_module, &toi_modules, module_list) - module_put(this_module->module); -} |