^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* -*- mode: c; c-basic-offset: 8; -*-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * vim: noexpandtab sw=8 ts=8 sts=0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * stackglue.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Code which implements an OCFS2 specific interface to underlying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * cluster stacks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 2007, 2009 Oracle. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/kmod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/kobject.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "ocfs2_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "stackglue.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define OCFS2_STACK_PLUGIN_O2CB "o2cb"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define OCFS2_STACK_PLUGIN_USER "user"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define OCFS2_MAX_HB_CTL_PATH 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct ocfs2_protocol_version locking_max_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static DEFINE_SPINLOCK(ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static LIST_HEAD(ocfs2_stack_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static char cluster_stack_name[OCFS2_STACK_LABEL_LEN + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static char ocfs2_hb_ctl_path[OCFS2_MAX_HB_CTL_PATH] = "/sbin/ocfs2_hb_ctl";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * The stack currently in use. If not null, active_stack->sp_count > 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * the module is pinned, and the locking protocol cannot be changed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static struct ocfs2_stack_plugin *active_stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static struct ocfs2_stack_plugin *ocfs2_stack_lookup(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct ocfs2_stack_plugin *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) assert_spin_locked(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) list_for_each_entry(p, &ocfs2_stack_list, sp_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (!strcmp(p->sp_name, name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static int ocfs2_stack_driver_request(const char *stack_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) const char *plugin_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct ocfs2_stack_plugin *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * If the stack passed by the filesystem isn't the selected one,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * we can't continue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (strcmp(stack_name, cluster_stack_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) rc = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (active_stack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * If the active stack isn't the one we want, it cannot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * be selected right now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!strcmp(active_stack->sp_name, plugin_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) rc = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) p = ocfs2_stack_lookup(plugin_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (!p || !try_module_get(p->sp_owner)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) rc = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) active_stack = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* If we found it, pin it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) active_stack->sp_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * This function looks up the appropriate stack and makes it active. If
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * there is no stack, it tries to load it. It will fail if the stack still
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * cannot be found. It will also fail if a different stack is in use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int ocfs2_stack_driver_get(const char *stack_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) char *plugin_name = OCFS2_STACK_PLUGIN_O2CB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * Classic stack does not pass in a stack name. This is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * compatible with older tools as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!stack_name || !*stack_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) stack_name = OCFS2_STACK_PLUGIN_O2CB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (strlen(stack_name) != OCFS2_STACK_LABEL_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) "ocfs2 passed an invalid cluster stack label: \"%s\"\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) stack_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* Anything that isn't the classic stack is a user stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (strcmp(stack_name, OCFS2_STACK_PLUGIN_O2CB))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) plugin_name = OCFS2_STACK_PLUGIN_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) rc = ocfs2_stack_driver_request(stack_name, plugin_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (rc == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) request_module("ocfs2_stack_%s", plugin_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) rc = ocfs2_stack_driver_request(stack_name, plugin_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (rc == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) "ocfs2: Cluster stack driver \"%s\" cannot be found\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) plugin_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) } else if (rc == -EBUSY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) "ocfs2: A different cluster stack is in use\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static void ocfs2_stack_driver_put(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) BUG_ON(active_stack == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) BUG_ON(active_stack->sp_count == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) active_stack->sp_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (!active_stack->sp_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) module_put(active_stack->sp_owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) active_stack = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) int ocfs2_stack_glue_register(struct ocfs2_stack_plugin *plugin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (!ocfs2_stack_lookup(plugin->sp_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) plugin->sp_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) plugin->sp_max_proto = locking_max_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) list_add(&plugin->sp_list, &ocfs2_stack_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) printk(KERN_INFO "ocfs2: Registered cluster interface %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) plugin->sp_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) printk(KERN_ERR "ocfs2: Stack \"%s\" already registered\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) plugin->sp_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) rc = -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) EXPORT_SYMBOL_GPL(ocfs2_stack_glue_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) void ocfs2_stack_glue_unregister(struct ocfs2_stack_plugin *plugin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct ocfs2_stack_plugin *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) p = ocfs2_stack_lookup(plugin->sp_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) BUG_ON(p != plugin);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) BUG_ON(plugin == active_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) BUG_ON(plugin->sp_count != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) list_del_init(&plugin->sp_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) printk(KERN_INFO "ocfs2: Unregistered cluster interface %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) plugin->sp_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) printk(KERN_ERR "Stack \"%s\" is not registered\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) plugin->sp_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) EXPORT_SYMBOL_GPL(ocfs2_stack_glue_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) void ocfs2_stack_glue_set_max_proto_version(struct ocfs2_protocol_version *max_proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct ocfs2_stack_plugin *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (memcmp(max_proto, &locking_max_version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) sizeof(struct ocfs2_protocol_version))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) BUG_ON(locking_max_version.pv_major != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) locking_max_version = *max_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) list_for_each_entry(p, &ocfs2_stack_list, sp_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) p->sp_max_proto = locking_max_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) EXPORT_SYMBOL_GPL(ocfs2_stack_glue_set_max_proto_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * The ocfs2_dlm_lock() and ocfs2_dlm_unlock() functions take no argument
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * for the ast and bast functions. They will pass the lksb to the ast
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * and bast. The caller can wrap the lksb with their own structure to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * get more information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) int mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct ocfs2_dlm_lksb *lksb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) u32 flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) void *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) unsigned int namelen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (!lksb->lksb_conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) lksb->lksb_conn = conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) BUG_ON(lksb->lksb_conn != conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return active_stack->sp_ops->dlm_lock(conn, mode, lksb, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) name, namelen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) EXPORT_SYMBOL_GPL(ocfs2_dlm_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct ocfs2_dlm_lksb *lksb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) BUG_ON(lksb->lksb_conn == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return active_stack->sp_ops->dlm_unlock(conn, lksb, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) EXPORT_SYMBOL_GPL(ocfs2_dlm_unlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int ocfs2_dlm_lock_status(struct ocfs2_dlm_lksb *lksb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return active_stack->sp_ops->lock_status(lksb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) EXPORT_SYMBOL_GPL(ocfs2_dlm_lock_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) int ocfs2_dlm_lvb_valid(struct ocfs2_dlm_lksb *lksb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return active_stack->sp_ops->lvb_valid(lksb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) EXPORT_SYMBOL_GPL(ocfs2_dlm_lvb_valid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) void *ocfs2_dlm_lvb(struct ocfs2_dlm_lksb *lksb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return active_stack->sp_ops->lock_lvb(lksb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) EXPORT_SYMBOL_GPL(ocfs2_dlm_lvb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) void ocfs2_dlm_dump_lksb(struct ocfs2_dlm_lksb *lksb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) active_stack->sp_ops->dump_lksb(lksb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) EXPORT_SYMBOL_GPL(ocfs2_dlm_dump_lksb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) int ocfs2_stack_supports_plocks(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return active_stack && active_stack->sp_ops->plock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) EXPORT_SYMBOL_GPL(ocfs2_stack_supports_plocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) * ocfs2_plock() can only be safely called if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) * ocfs2_stack_supports_plocks() returned true
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) int ocfs2_plock(struct ocfs2_cluster_connection *conn, u64 ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct file *file, int cmd, struct file_lock *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) WARN_ON_ONCE(active_stack->sp_ops->plock == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (active_stack->sp_ops->plock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return active_stack->sp_ops->plock(conn, ino, file, cmd, fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) EXPORT_SYMBOL_GPL(ocfs2_plock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) int ocfs2_cluster_connect(const char *stack_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) const char *cluster_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) int cluster_name_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) const char *group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) int grouplen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct ocfs2_locking_protocol *lproto,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) void (*recovery_handler)(int node_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) void *recovery_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) void *recovery_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) struct ocfs2_cluster_connection **conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct ocfs2_cluster_connection *new_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) BUG_ON(group == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) BUG_ON(conn == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) BUG_ON(recovery_handler == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (grouplen > GROUP_NAME_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (memcmp(&lproto->lp_max_version, &locking_max_version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) sizeof(struct ocfs2_protocol_version))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) new_conn = kzalloc(sizeof(struct ocfs2_cluster_connection),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (!new_conn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) strlcpy(new_conn->cc_name, group, GROUP_NAME_MAX + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) new_conn->cc_namelen = grouplen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (cluster_name_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) strlcpy(new_conn->cc_cluster_name, cluster_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) CLUSTER_NAME_MAX + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) new_conn->cc_cluster_name_len = cluster_name_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) new_conn->cc_recovery_handler = recovery_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) new_conn->cc_recovery_data = recovery_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) new_conn->cc_proto = lproto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) /* Start the new connection at our maximum compatibility level */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) new_conn->cc_version = lproto->lp_max_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) /* This will pin the stack driver if successful */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) rc = ocfs2_stack_driver_get(stack_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) rc = active_stack->sp_ops->connect(new_conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) ocfs2_stack_driver_put();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) *conn = new_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) out_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) kfree(new_conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) EXPORT_SYMBOL_GPL(ocfs2_cluster_connect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) /* The caller will ensure all nodes have the same cluster stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) int ocfs2_cluster_connect_agnostic(const char *group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) int grouplen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) struct ocfs2_locking_protocol *lproto,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) void (*recovery_handler)(int node_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) void *recovery_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) void *recovery_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) struct ocfs2_cluster_connection **conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) char *stack_name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (cluster_stack_name[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) stack_name = cluster_stack_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return ocfs2_cluster_connect(stack_name, NULL, 0, group, grouplen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) lproto, recovery_handler, recovery_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) EXPORT_SYMBOL_GPL(ocfs2_cluster_connect_agnostic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) /* If hangup_pending is 0, the stack driver will be dropped */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) int hangup_pending)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) BUG_ON(conn == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) ret = active_stack->sp_ops->disconnect(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) /* XXX Should we free it anyway? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) kfree(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (!hangup_pending)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) ocfs2_stack_driver_put();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) EXPORT_SYMBOL_GPL(ocfs2_cluster_disconnect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * Leave the group for this filesystem. This is executed by a userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * program (stored in ocfs2_hb_ctl_path).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) static void ocfs2_leave_group(const char *group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) char *argv[5], *envp[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) argv[0] = ocfs2_hb_ctl_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) argv[1] = "-K";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) argv[2] = "-u";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) argv[3] = (char *)group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) argv[4] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) /* minimal command environment taken from cpu_run_sbin_hotplug */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) envp[0] = "HOME=/";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) envp[2] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) "ocfs2: Error %d running user helper "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) "\"%s %s %s %s\"\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) ret, argv[0], argv[1], argv[2], argv[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) * Hangup is a required post-umount. ocfs2-tools software expects the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * filesystem to call "ocfs2_hb_ctl" during unmount. This happens
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) * regardless of whether the DLM got started, so we can't do it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) * in ocfs2_cluster_disconnect(). The ocfs2_leave_group() function does
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * the actual work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) void ocfs2_cluster_hangup(const char *group, int grouplen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) BUG_ON(group == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) BUG_ON(group[grouplen] != '\0');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) ocfs2_leave_group(group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) /* cluster_disconnect() was called with hangup_pending==1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) ocfs2_stack_driver_put();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) EXPORT_SYMBOL_GPL(ocfs2_cluster_hangup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) int ocfs2_cluster_this_node(struct ocfs2_cluster_connection *conn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) unsigned int *node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) return active_stack->sp_ops->this_node(conn, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) EXPORT_SYMBOL_GPL(ocfs2_cluster_this_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * Sysfs bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) static ssize_t ocfs2_max_locking_protocol_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (locking_max_version.pv_major)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) ret = snprintf(buf, PAGE_SIZE, "%u.%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) locking_max_version.pv_major,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) locking_max_version.pv_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) static struct kobj_attribute ocfs2_attr_max_locking_protocol =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) __ATTR(max_locking_protocol, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) ocfs2_max_locking_protocol_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) static ssize_t ocfs2_loaded_cluster_plugins_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) ssize_t ret = 0, total = 0, remain = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) struct ocfs2_stack_plugin *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) list_for_each_entry(p, &ocfs2_stack_list, sp_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) ret = snprintf(buf, remain, "%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) p->sp_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (ret >= remain) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) /* snprintf() didn't fit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) total = -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) total += ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) remain -= ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) return total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) static struct kobj_attribute ocfs2_attr_loaded_cluster_plugins =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) __ATTR(loaded_cluster_plugins, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) ocfs2_loaded_cluster_plugins_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) static ssize_t ocfs2_active_cluster_plugin_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (active_stack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) ret = snprintf(buf, PAGE_SIZE, "%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) active_stack->sp_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (ret >= PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) ret = -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) static struct kobj_attribute ocfs2_attr_active_cluster_plugin =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) __ATTR(active_cluster_plugin, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) ocfs2_active_cluster_plugin_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) static ssize_t ocfs2_cluster_stack_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) ret = snprintf(buf, PAGE_SIZE, "%s\n", cluster_stack_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) static ssize_t ocfs2_cluster_stack_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) size_t len = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) if (len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (buf[len - 1] == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) len--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if ((len != OCFS2_STACK_LABEL_LEN) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) (strnlen(buf, len) != len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) spin_lock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (active_stack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (!strncmp(buf, cluster_stack_name, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) ret = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) memcpy(cluster_stack_name, buf, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) ret = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) spin_unlock(&ocfs2_stack_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) static struct kobj_attribute ocfs2_attr_cluster_stack =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) __ATTR(cluster_stack, S_IRUGO | S_IWUSR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) ocfs2_cluster_stack_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) ocfs2_cluster_stack_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) static ssize_t ocfs2_dlm_recover_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) return snprintf(buf, PAGE_SIZE, "1\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) static struct kobj_attribute ocfs2_attr_dlm_recover_support =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) __ATTR(dlm_recover_callback_support, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) ocfs2_dlm_recover_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) static struct attribute *ocfs2_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) &ocfs2_attr_max_locking_protocol.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) &ocfs2_attr_loaded_cluster_plugins.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) &ocfs2_attr_active_cluster_plugin.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) &ocfs2_attr_cluster_stack.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) &ocfs2_attr_dlm_recover_support.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) static const struct attribute_group ocfs2_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) .attrs = ocfs2_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) struct kset *ocfs2_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) EXPORT_SYMBOL_GPL(ocfs2_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) static void ocfs2_sysfs_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) kset_unregister(ocfs2_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) static int ocfs2_sysfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) ocfs2_kset = kset_create_and_add("ocfs2", NULL, fs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (!ocfs2_kset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) ret = sysfs_create_group(&ocfs2_kset->kobj, &ocfs2_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) kset_unregister(ocfs2_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * Sysctl bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) * The sysctl lives at /proc/sys/fs/ocfs2/nm/hb_ctl_path. The 'nm' doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) * make as much sense in a multiple cluster stack world, but it's safer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) * and easier to preserve the name.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) static struct ctl_table ocfs2_nm_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) .procname = "hb_ctl_path",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) .data = ocfs2_hb_ctl_path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) .maxlen = OCFS2_MAX_HB_CTL_PATH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) .mode = 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) .proc_handler = proc_dostring,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) static struct ctl_table ocfs2_mod_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) .procname = "nm",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) .data = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) .maxlen = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) .mode = 0555,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) .child = ocfs2_nm_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) static struct ctl_table ocfs2_kern_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) .procname = "ocfs2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) .data = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) .maxlen = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) .mode = 0555,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) .child = ocfs2_mod_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) static struct ctl_table ocfs2_root_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) .procname = "fs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) .data = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) .maxlen = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) .mode = 0555,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) .child = ocfs2_kern_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) static struct ctl_table_header *ocfs2_table_header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * Initialization
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) static int __init ocfs2_stack_glue_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) strcpy(cluster_stack_name, OCFS2_STACK_PLUGIN_O2CB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) ocfs2_table_header = register_sysctl_table(ocfs2_root_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) if (!ocfs2_table_header) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) "ocfs2 stack glue: unable to register sysctl\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) return -ENOMEM; /* or something. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) return ocfs2_sysfs_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) static void __exit ocfs2_stack_glue_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) memset(&locking_max_version, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) sizeof(struct ocfs2_protocol_version));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) ocfs2_sysfs_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) if (ocfs2_table_header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) unregister_sysctl_table(ocfs2_table_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) MODULE_AUTHOR("Oracle");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) MODULE_DESCRIPTION("ocfs2 cluter stack glue layer");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) module_init(ocfs2_stack_glue_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) module_exit(ocfs2_stack_glue_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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