From 670027c507e99521d416994a18a498def9ef2ea3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Sat, 22 Oct 2016 19:31:08 -0300 Subject: Linux-libre 4.8.3-gnu --- kernel/power/tuxonice_storage.c | 282 ---------------------------------------- 1 file changed, 282 deletions(-) delete mode 100644 kernel/power/tuxonice_storage.c (limited to 'kernel/power/tuxonice_storage.c') diff --git a/kernel/power/tuxonice_storage.c b/kernel/power/tuxonice_storage.c deleted file mode 100644 index d8539c275..000000000 --- a/kernel/power/tuxonice_storage.c +++ /dev/null @@ -1,282 +0,0 @@ -/* - * kernel/power/tuxonice_storage.c - * - * Copyright (C) 2005-2015 Nigel Cunningham (nigel at nigelcunningham com au) - * - * This file is released under the GPLv2. - * - * Routines for talking to a userspace program that manages storage. - * - * The kernel side: - * - starts the userspace program; - * - sends messages telling it when to open and close the connection; - * - tells it when to quit; - * - * The user space side: - * - passes messages regarding status; - * - */ - -#include -#include - -#include "tuxonice_sysfs.h" -#include "tuxonice_modules.h" -#include "tuxonice_netlink.h" -#include "tuxonice_storage.h" -#include "tuxonice_ui.h" - -static struct user_helper_data usm_helper_data; -static struct toi_module_ops usm_ops; -static int message_received, usm_prepare_count; -static int storage_manager_last_action, storage_manager_action; - -static int usm_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 >= USM_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 && usm_helper_data.pid != -1) - return -EBUSY; - - data = (int *) NLMSG_DATA(nlh); - - switch (type) { - case USM_MSG_SUCCESS: - case USM_MSG_FAILED: - message_received = type; - complete(&usm_helper_data.wait_for_process); - break; - default: - printk(KERN_INFO "Storage manager doesn't recognise " - "message %d.\n", type); - } - - return 1; -} - -#ifdef CONFIG_NET -static int activations; - -int toi_activate_storage(int force) -{ - int tries = 1; - - if (usm_helper_data.pid == -1 || !usm_ops.enabled) - return 0; - - message_received = 0; - activations++; - - if (activations > 1 && !force) - return 0; - - while ((!message_received || message_received == USM_MSG_FAILED) && - tries < 2) { - toi_prepare_status(DONT_CLEAR_BAR, "Activate storage attempt " - "%d.\n", tries); - - init_completion(&usm_helper_data.wait_for_process); - - toi_send_netlink_message(&usm_helper_data, - USM_MSG_CONNECT, - NULL, 0); - - /* Wait 2 seconds for the userspace process to make contact */ - wait_for_completion_timeout(&usm_helper_data.wait_for_process, - 2*HZ); - - tries++; - } - - return 0; -} - -int toi_deactivate_storage(int force) -{ - if (usm_helper_data.pid == -1 || !usm_ops.enabled) - return 0; - - message_received = 0; - activations--; - - if (activations && !force) - return 0; - - init_completion(&usm_helper_data.wait_for_process); - - toi_send_netlink_message(&usm_helper_data, - USM_MSG_DISCONNECT, - NULL, 0); - - wait_for_completion_timeout(&usm_helper_data.wait_for_process, 2*HZ); - - if (!message_received || message_received == USM_MSG_FAILED) { - printk(KERN_INFO "Returning failure disconnecting storage.\n"); - return 1; - } - - return 0; -} -#endif - -static void storage_manager_simulate(void) -{ - printk(KERN_INFO "--- Storage manager simulate ---\n"); - toi_prepare_usm(); - schedule(); - printk(KERN_INFO "--- Activate storage 1 ---\n"); - toi_activate_storage(1); - schedule(); - printk(KERN_INFO "--- Deactivate storage 1 ---\n"); - toi_deactivate_storage(1); - schedule(); - printk(KERN_INFO "--- Cleanup usm ---\n"); - toi_cleanup_usm(); - schedule(); - printk(KERN_INFO "--- Storage manager simulate ends ---\n"); -} - -static int usm_storage_needed(void) -{ - return sizeof(int) + strlen(usm_helper_data.program) + 1; -} - -static int usm_save_config_info(char *buf) -{ - int len = strlen(usm_helper_data.program); - memcpy(buf, usm_helper_data.program, len + 1); - return sizeof(int) + len + 1; -} - -static void usm_load_config_info(char *buf, int size) -{ - /* Don't load the saved path if one has already been set */ - if (usm_helper_data.program[0]) - return; - - memcpy(usm_helper_data.program, buf + sizeof(int), *((int *) buf)); -} - -static int usm_memory_needed(void) -{ - /* ball park figure of 32 pages */ - return 32 * PAGE_SIZE; -} - -/* toi_prepare_usm - */ -int toi_prepare_usm(void) -{ - usm_prepare_count++; - - if (usm_prepare_count > 1 || !usm_ops.enabled) - return 0; - - usm_helper_data.pid = -1; - - if (!*usm_helper_data.program) - return 0; - - toi_netlink_setup(&usm_helper_data); - - if (usm_helper_data.pid == -1) - printk(KERN_INFO "TuxOnIce Storage Manager wanted, but couldn't" - " start it.\n"); - - toi_activate_storage(0); - - return usm_helper_data.pid != -1; -} - -void toi_cleanup_usm(void) -{ - usm_prepare_count--; - - if (usm_helper_data.pid > -1 && !usm_prepare_count) { - toi_deactivate_storage(0); - toi_netlink_close(&usm_helper_data); - } -} - -static void storage_manager_activate(void) -{ - if (storage_manager_action == storage_manager_last_action) - return; - - if (storage_manager_action) - toi_prepare_usm(); - else - toi_cleanup_usm(); - - storage_manager_last_action = storage_manager_action; -} - -/* - * User interface specific /sys/power/tuxonice entries. - */ - -static struct toi_sysfs_data sysfs_params[] = { - SYSFS_NONE("simulate_atomic_copy", storage_manager_simulate), - SYSFS_INT("enabled", SYSFS_RW, &usm_ops.enabled, 0, 1, 0, NULL), - SYSFS_STRING("program", SYSFS_RW, usm_helper_data.program, 254, 0, - NULL), - SYSFS_INT("activate_storage", SYSFS_RW , &storage_manager_action, 0, 1, - 0, storage_manager_activate) -}; - -static struct toi_module_ops usm_ops = { - .type = MISC_MODULE, - .name = "usm", - .directory = "storage_manager", - .module = THIS_MODULE, - .storage_needed = usm_storage_needed, - .save_config_info = usm_save_config_info, - .load_config_info = usm_load_config_info, - .memory_needed = usm_memory_needed, - - .sysfs_data = sysfs_params, - .num_sysfs_entries = sizeof(sysfs_params) / - sizeof(struct toi_sysfs_data), -}; - -/* toi_usm_sysfs_init - * Description: Boot time initialisation for user interface. - */ -int toi_usm_init(void) -{ - usm_helper_data.nl = NULL; - usm_helper_data.program[0] = '\0'; - usm_helper_data.pid = -1; - usm_helper_data.skb_size = 0; - usm_helper_data.pool_limit = 6; - usm_helper_data.netlink_id = NETLINK_TOI_USM; - usm_helper_data.name = "userspace storage manager"; - usm_helper_data.rcv_msg = usm_user_rcv_msg; - usm_helper_data.interface_version = 2; - usm_helper_data.must_init = 0; - init_completion(&usm_helper_data.wait_for_process); - - return toi_register_module(&usm_ops); -} - -void toi_usm_exit(void) -{ - toi_netlink_close_complete(&usm_helper_data); - toi_unregister_module(&usm_ops); -} -- cgit v1.2.3