c05564c4d8
Android 13
926 lines
20 KiB
C
Executable file
926 lines
20 KiB
C
Executable file
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include <linux/module.h>
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#include "dlm_internal.h"
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#include "lockspace.h"
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#include "member.h"
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#include "recoverd.h"
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#include "dir.h"
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#include "lowcomms.h"
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#include "config.h"
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#include "memory.h"
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#include "lock.h"
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#include "recover.h"
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#include "requestqueue.h"
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#include "user.h"
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#include "ast.h"
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static int ls_count;
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static struct mutex ls_lock;
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static struct list_head lslist;
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static spinlock_t lslist_lock;
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static struct task_struct * scand_task;
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static ssize_t dlm_control_store(struct dlm_ls *ls, const char *buf, size_t len)
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{
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ssize_t ret = len;
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int n;
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int rc = kstrtoint(buf, 0, &n);
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if (rc)
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return rc;
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ls = dlm_find_lockspace_local(ls->ls_local_handle);
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if (!ls)
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return -EINVAL;
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switch (n) {
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case 0:
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dlm_ls_stop(ls);
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break;
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case 1:
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dlm_ls_start(ls);
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break;
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default:
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ret = -EINVAL;
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}
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dlm_put_lockspace(ls);
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return ret;
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}
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static ssize_t dlm_event_store(struct dlm_ls *ls, const char *buf, size_t len)
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{
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int rc = kstrtoint(buf, 0, &ls->ls_uevent_result);
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if (rc)
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return rc;
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set_bit(LSFL_UEVENT_WAIT, &ls->ls_flags);
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wake_up(&ls->ls_uevent_wait);
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return len;
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}
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static ssize_t dlm_id_show(struct dlm_ls *ls, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%u\n", ls->ls_global_id);
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}
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static ssize_t dlm_id_store(struct dlm_ls *ls, const char *buf, size_t len)
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{
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int rc = kstrtouint(buf, 0, &ls->ls_global_id);
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if (rc)
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return rc;
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return len;
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}
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static ssize_t dlm_nodir_show(struct dlm_ls *ls, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%u\n", dlm_no_directory(ls));
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}
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static ssize_t dlm_nodir_store(struct dlm_ls *ls, const char *buf, size_t len)
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{
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int val;
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int rc = kstrtoint(buf, 0, &val);
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if (rc)
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return rc;
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if (val == 1)
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set_bit(LSFL_NODIR, &ls->ls_flags);
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return len;
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}
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static ssize_t dlm_recover_status_show(struct dlm_ls *ls, char *buf)
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{
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uint32_t status = dlm_recover_status(ls);
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return snprintf(buf, PAGE_SIZE, "%x\n", status);
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}
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static ssize_t dlm_recover_nodeid_show(struct dlm_ls *ls, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", ls->ls_recover_nodeid);
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}
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struct dlm_attr {
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struct attribute attr;
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ssize_t (*show)(struct dlm_ls *, char *);
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ssize_t (*store)(struct dlm_ls *, const char *, size_t);
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};
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static struct dlm_attr dlm_attr_control = {
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.attr = {.name = "control", .mode = S_IWUSR},
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.store = dlm_control_store
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};
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static struct dlm_attr dlm_attr_event = {
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.attr = {.name = "event_done", .mode = S_IWUSR},
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.store = dlm_event_store
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};
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static struct dlm_attr dlm_attr_id = {
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.attr = {.name = "id", .mode = S_IRUGO | S_IWUSR},
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.show = dlm_id_show,
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.store = dlm_id_store
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};
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static struct dlm_attr dlm_attr_nodir = {
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.attr = {.name = "nodir", .mode = S_IRUGO | S_IWUSR},
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.show = dlm_nodir_show,
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.store = dlm_nodir_store
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};
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static struct dlm_attr dlm_attr_recover_status = {
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.attr = {.name = "recover_status", .mode = S_IRUGO},
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.show = dlm_recover_status_show
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};
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static struct dlm_attr dlm_attr_recover_nodeid = {
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.attr = {.name = "recover_nodeid", .mode = S_IRUGO},
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.show = dlm_recover_nodeid_show
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};
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static struct attribute *dlm_attrs[] = {
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&dlm_attr_control.attr,
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&dlm_attr_event.attr,
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&dlm_attr_id.attr,
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&dlm_attr_nodir.attr,
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&dlm_attr_recover_status.attr,
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&dlm_attr_recover_nodeid.attr,
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NULL,
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};
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static ssize_t dlm_attr_show(struct kobject *kobj, struct attribute *attr,
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char *buf)
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{
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struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj);
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struct dlm_attr *a = container_of(attr, struct dlm_attr, attr);
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return a->show ? a->show(ls, buf) : 0;
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}
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static ssize_t dlm_attr_store(struct kobject *kobj, struct attribute *attr,
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const char *buf, size_t len)
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{
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struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj);
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struct dlm_attr *a = container_of(attr, struct dlm_attr, attr);
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return a->store ? a->store(ls, buf, len) : len;
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}
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static void lockspace_kobj_release(struct kobject *k)
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{
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struct dlm_ls *ls = container_of(k, struct dlm_ls, ls_kobj);
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kfree(ls);
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}
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static const struct sysfs_ops dlm_attr_ops = {
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.show = dlm_attr_show,
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.store = dlm_attr_store,
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};
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static struct kobj_type dlm_ktype = {
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.default_attrs = dlm_attrs,
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.sysfs_ops = &dlm_attr_ops,
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.release = lockspace_kobj_release,
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};
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static struct kset *dlm_kset;
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static int do_uevent(struct dlm_ls *ls, int in)
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{
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int error;
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if (in)
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kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE);
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else
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kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE);
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log_rinfo(ls, "%s the lockspace group...", in ? "joining" : "leaving");
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/* dlm_controld will see the uevent, do the necessary group management
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and then write to sysfs to wake us */
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error = wait_event_interruptible(ls->ls_uevent_wait,
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test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags));
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log_rinfo(ls, "group event done %d %d", error, ls->ls_uevent_result);
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if (error)
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goto out;
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error = ls->ls_uevent_result;
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out:
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if (error)
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log_error(ls, "group %s failed %d %d", in ? "join" : "leave",
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error, ls->ls_uevent_result);
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return error;
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}
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static int dlm_uevent(struct kset *kset, struct kobject *kobj,
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struct kobj_uevent_env *env)
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{
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struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj);
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add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name);
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return 0;
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}
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static const struct kset_uevent_ops dlm_uevent_ops = {
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.uevent = dlm_uevent,
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};
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int __init dlm_lockspace_init(void)
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{
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ls_count = 0;
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mutex_init(&ls_lock);
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INIT_LIST_HEAD(&lslist);
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spin_lock_init(&lslist_lock);
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dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj);
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if (!dlm_kset) {
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printk(KERN_WARNING "%s: can not create kset\n", __func__);
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return -ENOMEM;
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}
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return 0;
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}
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void dlm_lockspace_exit(void)
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{
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kset_unregister(dlm_kset);
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}
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static struct dlm_ls *find_ls_to_scan(void)
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{
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struct dlm_ls *ls;
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spin_lock(&lslist_lock);
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list_for_each_entry(ls, &lslist, ls_list) {
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if (time_after_eq(jiffies, ls->ls_scan_time +
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dlm_config.ci_scan_secs * HZ)) {
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spin_unlock(&lslist_lock);
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return ls;
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}
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}
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spin_unlock(&lslist_lock);
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return NULL;
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}
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static int dlm_scand(void *data)
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{
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struct dlm_ls *ls;
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while (!kthread_should_stop()) {
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ls = find_ls_to_scan();
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if (ls) {
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if (dlm_lock_recovery_try(ls)) {
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ls->ls_scan_time = jiffies;
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dlm_scan_rsbs(ls);
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dlm_scan_timeout(ls);
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dlm_scan_waiters(ls);
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dlm_unlock_recovery(ls);
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} else {
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ls->ls_scan_time += HZ;
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}
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continue;
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}
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schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ);
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}
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return 0;
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}
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static int dlm_scand_start(void)
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{
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struct task_struct *p;
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int error = 0;
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p = kthread_run(dlm_scand, NULL, "dlm_scand");
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if (IS_ERR(p))
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error = PTR_ERR(p);
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else
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scand_task = p;
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return error;
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}
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static void dlm_scand_stop(void)
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{
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kthread_stop(scand_task);
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}
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struct dlm_ls *dlm_find_lockspace_global(uint32_t id)
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{
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struct dlm_ls *ls;
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spin_lock(&lslist_lock);
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list_for_each_entry(ls, &lslist, ls_list) {
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if (ls->ls_global_id == id) {
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ls->ls_count++;
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goto out;
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}
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}
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ls = NULL;
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out:
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spin_unlock(&lslist_lock);
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return ls;
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}
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struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace)
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{
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struct dlm_ls *ls;
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spin_lock(&lslist_lock);
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list_for_each_entry(ls, &lslist, ls_list) {
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if (ls->ls_local_handle == lockspace) {
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ls->ls_count++;
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goto out;
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}
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}
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ls = NULL;
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out:
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spin_unlock(&lslist_lock);
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return ls;
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}
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struct dlm_ls *dlm_find_lockspace_device(int minor)
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{
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struct dlm_ls *ls;
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spin_lock(&lslist_lock);
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list_for_each_entry(ls, &lslist, ls_list) {
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if (ls->ls_device.minor == minor) {
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ls->ls_count++;
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goto out;
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}
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}
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ls = NULL;
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out:
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spin_unlock(&lslist_lock);
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return ls;
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}
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void dlm_put_lockspace(struct dlm_ls *ls)
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{
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spin_lock(&lslist_lock);
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ls->ls_count--;
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spin_unlock(&lslist_lock);
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}
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static void remove_lockspace(struct dlm_ls *ls)
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{
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for (;;) {
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spin_lock(&lslist_lock);
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if (ls->ls_count == 0) {
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WARN_ON(ls->ls_create_count != 0);
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list_del(&ls->ls_list);
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spin_unlock(&lslist_lock);
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return;
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}
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spin_unlock(&lslist_lock);
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ssleep(1);
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}
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}
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static int threads_start(void)
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{
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int error;
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error = dlm_scand_start();
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if (error) {
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log_print("cannot start dlm_scand thread %d", error);
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goto fail;
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}
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/* Thread for sending/receiving messages for all lockspace's */
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error = dlm_lowcomms_start();
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if (error) {
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log_print("cannot start dlm lowcomms %d", error);
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goto scand_fail;
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}
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return 0;
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scand_fail:
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dlm_scand_stop();
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fail:
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return error;
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}
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static void threads_stop(void)
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{
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dlm_scand_stop();
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dlm_lowcomms_stop();
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}
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static int new_lockspace(const char *name, const char *cluster,
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uint32_t flags, int lvblen,
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const struct dlm_lockspace_ops *ops, void *ops_arg,
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int *ops_result, dlm_lockspace_t **lockspace)
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{
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struct dlm_ls *ls;
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int i, size, error;
|
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int do_unreg = 0;
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int namelen = strlen(name);
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|
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if (namelen > DLM_LOCKSPACE_LEN)
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return -EINVAL;
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|
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if (!lvblen || (lvblen % 8))
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return -EINVAL;
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|
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if (!try_module_get(THIS_MODULE))
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return -EINVAL;
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|
|
|
if (!dlm_user_daemon_available()) {
|
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log_print("dlm user daemon not available");
|
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error = -EUNATCH;
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goto out;
|
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}
|
|
|
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if (ops && ops_result) {
|
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if (!dlm_config.ci_recover_callbacks)
|
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*ops_result = -EOPNOTSUPP;
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else
|
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*ops_result = 0;
|
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}
|
|
|
|
if (!cluster)
|
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log_print("dlm cluster name '%s' is being used without an application provided cluster name",
|
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dlm_config.ci_cluster_name);
|
|
|
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if (dlm_config.ci_recover_callbacks && cluster &&
|
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strncmp(cluster, dlm_config.ci_cluster_name, DLM_LOCKSPACE_LEN)) {
|
|
log_print("dlm cluster name '%s' does not match "
|
|
"the application cluster name '%s'",
|
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dlm_config.ci_cluster_name, cluster);
|
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error = -EBADR;
|
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goto out;
|
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}
|
|
|
|
error = 0;
|
|
|
|
spin_lock(&lslist_lock);
|
|
list_for_each_entry(ls, &lslist, ls_list) {
|
|
WARN_ON(ls->ls_create_count <= 0);
|
|
if (ls->ls_namelen != namelen)
|
|
continue;
|
|
if (memcmp(ls->ls_name, name, namelen))
|
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continue;
|
|
if (flags & DLM_LSFL_NEWEXCL) {
|
|
error = -EEXIST;
|
|
break;
|
|
}
|
|
ls->ls_create_count++;
|
|
*lockspace = ls;
|
|
error = 1;
|
|
break;
|
|
}
|
|
spin_unlock(&lslist_lock);
|
|
|
|
if (error)
|
|
goto out;
|
|
|
|
error = -ENOMEM;
|
|
|
|
ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_NOFS);
|
|
if (!ls)
|
|
goto out;
|
|
memcpy(ls->ls_name, name, namelen);
|
|
ls->ls_namelen = namelen;
|
|
ls->ls_lvblen = lvblen;
|
|
ls->ls_count = 0;
|
|
ls->ls_flags = 0;
|
|
ls->ls_scan_time = jiffies;
|
|
|
|
if (ops && dlm_config.ci_recover_callbacks) {
|
|
ls->ls_ops = ops;
|
|
ls->ls_ops_arg = ops_arg;
|
|
}
|
|
|
|
if (flags & DLM_LSFL_TIMEWARN)
|
|
set_bit(LSFL_TIMEWARN, &ls->ls_flags);
|
|
|
|
/* ls_exflags are forced to match among nodes, and we don't
|
|
need to require all nodes to have some flags set */
|
|
ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS |
|
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DLM_LSFL_NEWEXCL));
|
|
|
|
size = dlm_config.ci_rsbtbl_size;
|
|
ls->ls_rsbtbl_size = size;
|
|
|
|
ls->ls_rsbtbl = vmalloc(array_size(size, sizeof(struct dlm_rsbtable)));
|
|
if (!ls->ls_rsbtbl)
|
|
goto out_lsfree;
|
|
for (i = 0; i < size; i++) {
|
|
ls->ls_rsbtbl[i].keep.rb_node = NULL;
|
|
ls->ls_rsbtbl[i].toss.rb_node = NULL;
|
|
spin_lock_init(&ls->ls_rsbtbl[i].lock);
|
|
}
|
|
|
|
spin_lock_init(&ls->ls_remove_spin);
|
|
|
|
for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) {
|
|
ls->ls_remove_names[i] = kzalloc(DLM_RESNAME_MAXLEN+1,
|
|
GFP_KERNEL);
|
|
if (!ls->ls_remove_names[i])
|
|
goto out_rsbtbl;
|
|
}
|
|
|
|
idr_init(&ls->ls_lkbidr);
|
|
spin_lock_init(&ls->ls_lkbidr_spin);
|
|
|
|
INIT_LIST_HEAD(&ls->ls_waiters);
|
|
mutex_init(&ls->ls_waiters_mutex);
|
|
INIT_LIST_HEAD(&ls->ls_orphans);
|
|
mutex_init(&ls->ls_orphans_mutex);
|
|
INIT_LIST_HEAD(&ls->ls_timeout);
|
|
mutex_init(&ls->ls_timeout_mutex);
|
|
|
|
INIT_LIST_HEAD(&ls->ls_new_rsb);
|
|
spin_lock_init(&ls->ls_new_rsb_spin);
|
|
|
|
INIT_LIST_HEAD(&ls->ls_nodes);
|
|
INIT_LIST_HEAD(&ls->ls_nodes_gone);
|
|
ls->ls_num_nodes = 0;
|
|
ls->ls_low_nodeid = 0;
|
|
ls->ls_total_weight = 0;
|
|
ls->ls_node_array = NULL;
|
|
|
|
memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb));
|
|
ls->ls_stub_rsb.res_ls = ls;
|
|
|
|
ls->ls_debug_rsb_dentry = NULL;
|
|
ls->ls_debug_waiters_dentry = NULL;
|
|
|
|
init_waitqueue_head(&ls->ls_uevent_wait);
|
|
ls->ls_uevent_result = 0;
|
|
init_completion(&ls->ls_members_done);
|
|
ls->ls_members_result = -1;
|
|
|
|
mutex_init(&ls->ls_cb_mutex);
|
|
INIT_LIST_HEAD(&ls->ls_cb_delay);
|
|
|
|
ls->ls_recoverd_task = NULL;
|
|
mutex_init(&ls->ls_recoverd_active);
|
|
spin_lock_init(&ls->ls_recover_lock);
|
|
spin_lock_init(&ls->ls_rcom_spin);
|
|
get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t));
|
|
ls->ls_recover_status = 0;
|
|
ls->ls_recover_seq = 0;
|
|
ls->ls_recover_args = NULL;
|
|
init_rwsem(&ls->ls_in_recovery);
|
|
init_rwsem(&ls->ls_recv_active);
|
|
INIT_LIST_HEAD(&ls->ls_requestqueue);
|
|
mutex_init(&ls->ls_requestqueue_mutex);
|
|
mutex_init(&ls->ls_clear_proc_locks);
|
|
|
|
ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_NOFS);
|
|
if (!ls->ls_recover_buf)
|
|
goto out_lkbidr;
|
|
|
|
ls->ls_slot = 0;
|
|
ls->ls_num_slots = 0;
|
|
ls->ls_slots_size = 0;
|
|
ls->ls_slots = NULL;
|
|
|
|
INIT_LIST_HEAD(&ls->ls_recover_list);
|
|
spin_lock_init(&ls->ls_recover_list_lock);
|
|
idr_init(&ls->ls_recover_idr);
|
|
spin_lock_init(&ls->ls_recover_idr_lock);
|
|
ls->ls_recover_list_count = 0;
|
|
ls->ls_local_handle = ls;
|
|
init_waitqueue_head(&ls->ls_wait_general);
|
|
INIT_LIST_HEAD(&ls->ls_root_list);
|
|
init_rwsem(&ls->ls_root_sem);
|
|
|
|
spin_lock(&lslist_lock);
|
|
ls->ls_create_count = 1;
|
|
list_add(&ls->ls_list, &lslist);
|
|
spin_unlock(&lslist_lock);
|
|
|
|
if (flags & DLM_LSFL_FS) {
|
|
error = dlm_callback_start(ls);
|
|
if (error) {
|
|
log_error(ls, "can't start dlm_callback %d", error);
|
|
goto out_delist;
|
|
}
|
|
}
|
|
|
|
init_waitqueue_head(&ls->ls_recover_lock_wait);
|
|
|
|
/*
|
|
* Once started, dlm_recoverd first looks for ls in lslist, then
|
|
* initializes ls_in_recovery as locked in "down" mode. We need
|
|
* to wait for the wakeup from dlm_recoverd because in_recovery
|
|
* has to start out in down mode.
|
|
*/
|
|
|
|
error = dlm_recoverd_start(ls);
|
|
if (error) {
|
|
log_error(ls, "can't start dlm_recoverd %d", error);
|
|
goto out_callback;
|
|
}
|
|
|
|
wait_event(ls->ls_recover_lock_wait,
|
|
test_bit(LSFL_RECOVER_LOCK, &ls->ls_flags));
|
|
|
|
/* let kobject handle freeing of ls if there's an error */
|
|
do_unreg = 1;
|
|
|
|
ls->ls_kobj.kset = dlm_kset;
|
|
error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL,
|
|
"%s", ls->ls_name);
|
|
if (error)
|
|
goto out_recoverd;
|
|
kobject_uevent(&ls->ls_kobj, KOBJ_ADD);
|
|
|
|
/* This uevent triggers dlm_controld in userspace to add us to the
|
|
group of nodes that are members of this lockspace (managed by the
|
|
cluster infrastructure.) Once it's done that, it tells us who the
|
|
current lockspace members are (via configfs) and then tells the
|
|
lockspace to start running (via sysfs) in dlm_ls_start(). */
|
|
|
|
error = do_uevent(ls, 1);
|
|
if (error)
|
|
goto out_recoverd;
|
|
|
|
wait_for_completion(&ls->ls_members_done);
|
|
error = ls->ls_members_result;
|
|
if (error)
|
|
goto out_members;
|
|
|
|
dlm_create_debug_file(ls);
|
|
|
|
log_rinfo(ls, "join complete");
|
|
*lockspace = ls;
|
|
return 0;
|
|
|
|
out_members:
|
|
do_uevent(ls, 0);
|
|
dlm_clear_members(ls);
|
|
kfree(ls->ls_node_array);
|
|
out_recoverd:
|
|
dlm_recoverd_stop(ls);
|
|
out_callback:
|
|
dlm_callback_stop(ls);
|
|
out_delist:
|
|
spin_lock(&lslist_lock);
|
|
list_del(&ls->ls_list);
|
|
spin_unlock(&lslist_lock);
|
|
idr_destroy(&ls->ls_recover_idr);
|
|
kfree(ls->ls_recover_buf);
|
|
out_lkbidr:
|
|
idr_destroy(&ls->ls_lkbidr);
|
|
out_rsbtbl:
|
|
for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) {
|
|
if (ls->ls_remove_names[i])
|
|
kfree(ls->ls_remove_names[i]);
|
|
}
|
|
vfree(ls->ls_rsbtbl);
|
|
out_lsfree:
|
|
if (do_unreg)
|
|
kobject_put(&ls->ls_kobj);
|
|
else
|
|
kfree(ls);
|
|
out:
|
|
module_put(THIS_MODULE);
|
|
return error;
|
|
}
|
|
|
|
int dlm_new_lockspace(const char *name, const char *cluster,
|
|
uint32_t flags, int lvblen,
|
|
const struct dlm_lockspace_ops *ops, void *ops_arg,
|
|
int *ops_result, dlm_lockspace_t **lockspace)
|
|
{
|
|
int error = 0;
|
|
|
|
mutex_lock(&ls_lock);
|
|
if (!ls_count)
|
|
error = threads_start();
|
|
if (error)
|
|
goto out;
|
|
|
|
error = new_lockspace(name, cluster, flags, lvblen, ops, ops_arg,
|
|
ops_result, lockspace);
|
|
if (!error)
|
|
ls_count++;
|
|
if (error > 0)
|
|
error = 0;
|
|
if (!ls_count)
|
|
threads_stop();
|
|
out:
|
|
mutex_unlock(&ls_lock);
|
|
return error;
|
|
}
|
|
|
|
static int lkb_idr_is_local(int id, void *p, void *data)
|
|
{
|
|
struct dlm_lkb *lkb = p;
|
|
|
|
return lkb->lkb_nodeid == 0 && lkb->lkb_grmode != DLM_LOCK_IV;
|
|
}
|
|
|
|
static int lkb_idr_is_any(int id, void *p, void *data)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int lkb_idr_free(int id, void *p, void *data)
|
|
{
|
|
struct dlm_lkb *lkb = p;
|
|
|
|
if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY)
|
|
dlm_free_lvb(lkb->lkb_lvbptr);
|
|
|
|
dlm_free_lkb(lkb);
|
|
return 0;
|
|
}
|
|
|
|
/* NOTE: We check the lkbidr here rather than the resource table.
|
|
This is because there may be LKBs queued as ASTs that have been unlinked
|
|
from their RSBs and are pending deletion once the AST has been delivered */
|
|
|
|
static int lockspace_busy(struct dlm_ls *ls, int force)
|
|
{
|
|
int rv;
|
|
|
|
spin_lock(&ls->ls_lkbidr_spin);
|
|
if (force == 0) {
|
|
rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls);
|
|
} else if (force == 1) {
|
|
rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_local, ls);
|
|
} else {
|
|
rv = 0;
|
|
}
|
|
spin_unlock(&ls->ls_lkbidr_spin);
|
|
return rv;
|
|
}
|
|
|
|
static int release_lockspace(struct dlm_ls *ls, int force)
|
|
{
|
|
struct dlm_rsb *rsb;
|
|
struct rb_node *n;
|
|
int i, busy, rv;
|
|
|
|
busy = lockspace_busy(ls, force);
|
|
|
|
spin_lock(&lslist_lock);
|
|
if (ls->ls_create_count == 1) {
|
|
if (busy) {
|
|
rv = -EBUSY;
|
|
} else {
|
|
/* remove_lockspace takes ls off lslist */
|
|
ls->ls_create_count = 0;
|
|
rv = 0;
|
|
}
|
|
} else if (ls->ls_create_count > 1) {
|
|
rv = --ls->ls_create_count;
|
|
} else {
|
|
rv = -EINVAL;
|
|
}
|
|
spin_unlock(&lslist_lock);
|
|
|
|
if (rv) {
|
|
log_debug(ls, "release_lockspace no remove %d", rv);
|
|
return rv;
|
|
}
|
|
|
|
dlm_device_deregister(ls);
|
|
|
|
if (force < 3 && dlm_user_daemon_available())
|
|
do_uevent(ls, 0);
|
|
|
|
dlm_recoverd_stop(ls);
|
|
|
|
dlm_callback_stop(ls);
|
|
|
|
remove_lockspace(ls);
|
|
|
|
dlm_delete_debug_file(ls);
|
|
|
|
idr_destroy(&ls->ls_recover_idr);
|
|
kfree(ls->ls_recover_buf);
|
|
|
|
/*
|
|
* Free all lkb's in idr
|
|
*/
|
|
|
|
idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls);
|
|
idr_destroy(&ls->ls_lkbidr);
|
|
|
|
/*
|
|
* Free all rsb's on rsbtbl[] lists
|
|
*/
|
|
|
|
for (i = 0; i < ls->ls_rsbtbl_size; i++) {
|
|
while ((n = rb_first(&ls->ls_rsbtbl[i].keep))) {
|
|
rsb = rb_entry(n, struct dlm_rsb, res_hashnode);
|
|
rb_erase(n, &ls->ls_rsbtbl[i].keep);
|
|
dlm_free_rsb(rsb);
|
|
}
|
|
|
|
while ((n = rb_first(&ls->ls_rsbtbl[i].toss))) {
|
|
rsb = rb_entry(n, struct dlm_rsb, res_hashnode);
|
|
rb_erase(n, &ls->ls_rsbtbl[i].toss);
|
|
dlm_free_rsb(rsb);
|
|
}
|
|
}
|
|
|
|
vfree(ls->ls_rsbtbl);
|
|
|
|
for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++)
|
|
kfree(ls->ls_remove_names[i]);
|
|
|
|
while (!list_empty(&ls->ls_new_rsb)) {
|
|
rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb,
|
|
res_hashchain);
|
|
list_del(&rsb->res_hashchain);
|
|
dlm_free_rsb(rsb);
|
|
}
|
|
|
|
/*
|
|
* Free structures on any other lists
|
|
*/
|
|
|
|
dlm_purge_requestqueue(ls);
|
|
kfree(ls->ls_recover_args);
|
|
dlm_clear_members(ls);
|
|
dlm_clear_members_gone(ls);
|
|
kfree(ls->ls_node_array);
|
|
log_rinfo(ls, "release_lockspace final free");
|
|
kobject_put(&ls->ls_kobj);
|
|
/* The ls structure will be freed when the kobject is done with */
|
|
|
|
module_put(THIS_MODULE);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called when a system has released all its locks and is not going to use the
|
|
* lockspace any longer. We free everything we're managing for this lockspace.
|
|
* Remaining nodes will go through the recovery process as if we'd died. The
|
|
* lockspace must continue to function as usual, participating in recoveries,
|
|
* until this returns.
|
|
*
|
|
* Force has 4 possible values:
|
|
* 0 - don't destroy locksapce if it has any LKBs
|
|
* 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs
|
|
* 2 - destroy lockspace regardless of LKBs
|
|
* 3 - destroy lockspace as part of a forced shutdown
|
|
*/
|
|
|
|
int dlm_release_lockspace(void *lockspace, int force)
|
|
{
|
|
struct dlm_ls *ls;
|
|
int error;
|
|
|
|
ls = dlm_find_lockspace_local(lockspace);
|
|
if (!ls)
|
|
return -EINVAL;
|
|
dlm_put_lockspace(ls);
|
|
|
|
mutex_lock(&ls_lock);
|
|
error = release_lockspace(ls, force);
|
|
if (!error)
|
|
ls_count--;
|
|
if (!ls_count)
|
|
threads_stop();
|
|
mutex_unlock(&ls_lock);
|
|
|
|
return error;
|
|
}
|
|
|
|
void dlm_stop_lockspaces(void)
|
|
{
|
|
struct dlm_ls *ls;
|
|
int count;
|
|
|
|
restart:
|
|
count = 0;
|
|
spin_lock(&lslist_lock);
|
|
list_for_each_entry(ls, &lslist, ls_list) {
|
|
if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) {
|
|
count++;
|
|
continue;
|
|
}
|
|
spin_unlock(&lslist_lock);
|
|
log_error(ls, "no userland control daemon, stopping lockspace");
|
|
dlm_ls_stop(ls);
|
|
goto restart;
|
|
}
|
|
spin_unlock(&lslist_lock);
|
|
|
|
if (count)
|
|
log_print("dlm user daemon left %d lockspaces", count);
|
|
}
|
|
|