*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
-** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
#include "memory.h"
#include "lock.h"
#include "recover.h"
+#include "requestqueue.h"
#ifdef CONFIG_DLM_DEBUG
int dlm_create_debug_file(struct dlm_ls *ls);
ssize_t ret = len;
int n = simple_strtol(buf, NULL, 0);
+ ls = dlm_find_lockspace_local(ls->ls_local_handle);
+ if (!ls)
+ return -EINVAL;
+
switch (n) {
case 0:
dlm_ls_stop(ls);
default:
ret = -EINVAL;
}
+ dlm_put_lockspace(ls);
return ret;
}
return a->store ? a->store(ls, buf, len) : len;
}
+static void lockspace_kobj_release(struct kobject *k)
+{
+ struct dlm_ls *ls = container_of(k, struct dlm_ls, ls_kobj);
+ kfree(ls);
+}
+
static struct sysfs_ops dlm_attr_ops = {
.show = dlm_attr_show,
.store = dlm_attr_store,
static struct kobj_type dlm_ktype = {
.default_attrs = dlm_attrs,
.sysfs_ops = &dlm_attr_ops,
+ .release = lockspace_kobj_release,
};
static struct kset dlm_kset = {
- .subsys = &kernel_subsys,
- .kobj = {.name = "dlm",},
.ktype = &dlm_ktype,
};
else
kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE);
+ log_debug(ls, "%s the lockspace group...", in ? "joining" : "leaving");
+
+ /* dlm_controld will see the uevent, do the necessary group management
+ and then write to sysfs to wake us */
+
error = wait_event_interruptible(ls->ls_uevent_wait,
test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags));
+
+ log_debug(ls, "group event done %d %d", error, ls->ls_uevent_result);
+
if (error)
goto out;
error = ls->ls_uevent_result;
out:
+ if (error)
+ log_error(ls, "group %s failed %d %d", in ? "join" : "leave",
+ error, ls->ls_uevent_result);
return error;
}
INIT_LIST_HEAD(&lslist);
spin_lock_init(&lslist_lock);
+ kobject_set_name(&dlm_kset.kobj, "dlm");
+ kobj_set_kset_s(&dlm_kset, kernel_subsys);
error = kset_register(&dlm_kset);
if (error)
printk("dlm_lockspace_init: cannot register kset %d\n", error);
struct dlm_ls *ls;
while (!kthread_should_stop()) {
- list_for_each_entry(ls, &lslist, ls_list)
- dlm_scan_rsbs(ls);
- schedule_timeout_interruptible(dlm_config.scan_secs * HZ);
+ list_for_each_entry(ls, &lslist, ls_list) {
+ if (dlm_lock_recovery_try(ls)) {
+ dlm_scan_rsbs(ls);
+ dlm_scan_timeout(ls);
+ dlm_unlock_recovery(ls);
+ }
+ }
+ schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ);
}
return 0;
}
{
struct dlm_ls *ls;
int i, size, error = -ENOMEM;
+ int do_unreg = 0;
if (namelen > DLM_LOCKSPACE_LEN)
return -EINVAL;
goto out;
memcpy(ls->ls_name, name, namelen);
ls->ls_namelen = namelen;
- ls->ls_exflags = flags;
ls->ls_lvblen = lvblen;
ls->ls_count = 0;
ls->ls_flags = 0;
- size = dlm_config.rsbtbl_size;
+ if (flags & DLM_LSFL_TIMEWARN)
+ set_bit(LSFL_TIMEWARN, &ls->ls_flags);
+
+ if (flags & DLM_LSFL_FS)
+ ls->ls_allocation = GFP_NOFS;
+ else
+ ls->ls_allocation = GFP_KERNEL;
+
+ /* ls_exflags are forced to match among nodes, and we don't
+ need to require all nodes to have TIMEWARN or FS set */
+ ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS));
+
+ size = dlm_config.ci_rsbtbl_size;
ls->ls_rsbtbl_size = size;
ls->ls_rsbtbl = kmalloc(sizeof(struct dlm_rsbtable) * size, GFP_KERNEL);
rwlock_init(&ls->ls_rsbtbl[i].lock);
}
- size = dlm_config.lkbtbl_size;
+ size = dlm_config.ci_lkbtbl_size;
ls->ls_lkbtbl_size = size;
ls->ls_lkbtbl = kmalloc(sizeof(struct dlm_lkbtable) * size, GFP_KERNEL);
ls->ls_lkbtbl[i].counter = 1;
}
- size = dlm_config.dirtbl_size;
+ size = dlm_config.ci_dirtbl_size;
ls->ls_dirtbl_size = size;
ls->ls_dirtbl = kmalloc(sizeof(struct dlm_dirtable) * size, GFP_KERNEL);
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_nodes);
INIT_LIST_HEAD(&ls->ls_nodes_gone);
init_waitqueue_head(&ls->ls_uevent_wait);
ls->ls_uevent_result = 0;
+ init_completion(&ls->ls_members_done);
+ ls->ls_members_result = -1;
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.buffer_size, GFP_KERNEL);
+ ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_KERNEL);
if (!ls->ls_recover_buf)
goto out_dirfree;
error = dlm_recoverd_start(ls);
if (error) {
log_error(ls, "can't start dlm_recoverd %d", error);
- goto out_rcomfree;
+ goto out_delist;
}
- dlm_create_debug_file(ls);
-
error = kobject_setup(ls);
if (error)
- goto out_del;
+ goto out_stop;
error = kobject_register(&ls->ls_kobj);
if (error)
- goto out_del;
+ goto out_stop;
+
+ /* let kobject handle freeing of ls if there's an error */
+ do_unreg = 1;
+
+ /* 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_unreg;
+ goto out_stop;
+
+ wait_for_completion(&ls->ls_members_done);
+ error = ls->ls_members_result;
+ if (error)
+ goto out_members;
+
+ dlm_create_debug_file(ls);
+
+ log_debug(ls, "join complete");
*lockspace = ls;
return 0;
- out_unreg:
- kobject_unregister(&ls->ls_kobj);
- out_del:
- dlm_delete_debug_file(ls);
+ out_members:
+ do_uevent(ls, 0);
+ dlm_clear_members(ls);
+ kfree(ls->ls_node_array);
+ out_stop:
dlm_recoverd_stop(ls);
- out_rcomfree:
+ out_delist:
spin_lock(&lslist_lock);
list_del(&ls->ls_list);
spin_unlock(&lslist_lock);
out_rsbfree:
kfree(ls->ls_rsbtbl);
out_lsfree:
- kfree(ls);
+ if (do_unreg)
+ kobject_unregister(&ls->ls_kobj);
+ else
+ kfree(ls);
out:
module_put(THIS_MODULE);
return error;
error = new_lockspace(name, namelen, lockspace, flags, lvblen);
if (!error)
ls_count++;
+ else if (!ls_count)
+ threads_stop();
out:
mutex_unlock(&ls_lock);
return error;
* Free structures on any other lists
*/
+ dlm_purge_requestqueue(ls);
kfree(ls->ls_recover_args);
dlm_clear_free_entries(ls);
dlm_clear_members(ls);
dlm_clear_members_gone(ls);
kfree(ls->ls_node_array);
kobject_unregister(&ls->ls_kobj);
- kfree(ls);
+ /* The ls structure will be freed when the kobject is done with */
mutex_lock(&ls_lock);
ls_count--;