*******************************************************************************
**
** 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 "recover.h"
#include "requestqueue.h"
-#ifdef CONFIG_DLM_DEBUG
-int dlm_create_debug_file(struct dlm_ls *ls);
-void dlm_delete_debug_file(struct dlm_ls *ls);
-#else
-static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; }
-static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
-#endif
-
static int ls_count;
static struct mutex ls_lock;
static struct list_head lslist;
.release = lockspace_kobj_release,
};
-static struct kset dlm_kset = {
- .kobj = {.name = "dlm",},
- .ktype = &dlm_ktype,
-};
-
-static int kobject_setup(struct dlm_ls *ls)
-{
- char lsname[DLM_LOCKSPACE_LEN];
- int error;
-
- memset(lsname, 0, DLM_LOCKSPACE_LEN);
- snprintf(lsname, DLM_LOCKSPACE_LEN, "%s", ls->ls_name);
-
- error = kobject_set_name(&ls->ls_kobj, "%s", lsname);
- if (error)
- return error;
-
- ls->ls_kobj.kset = &dlm_kset;
- ls->ls_kobj.ktype = &dlm_ktype;
- return 0;
-}
+static struct kset *dlm_kset;
static int do_uevent(struct dlm_ls *ls, int in)
{
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;
}
-int dlm_lockspace_init(void)
+int __init dlm_lockspace_init(void)
{
- int error;
-
ls_count = 0;
mutex_init(&ls_lock);
INIT_LIST_HEAD(&lslist);
spin_lock_init(&lslist_lock);
- 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);
- return error;
+ dlm_kset = kset_create_and_add("dlm", NULL, kernel_kobj);
+ if (!dlm_kset) {
+ printk(KERN_WARNING "%s: can not create kset\n", __func__);
+ return -ENOMEM;
+ }
+ return 0;
}
void dlm_lockspace_exit(void)
{
- kset_unregister(&dlm_kset);
+ kset_unregister(dlm_kset);
}
static int dlm_scand(void *data)
struct dlm_ls *ls;
while (!kthread_should_stop()) {
- list_for_each_entry(ls, &lslist, ls_list)
- dlm_scan_rsbs(ls);
+ 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;
+ 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;
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);
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);
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);
+ 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_del;
+ goto out_stop;
+ kobject_uevent(&ls->ls_kobj, KOBJ_ADD);
- error = kobject_register(&ls->ls_kobj);
- if (error)
- goto out_del;
+ /* 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_put(&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;
dlm_del_ast(lkb);
if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY)
- free_lvb(lkb->lkb_lvbptr);
+ dlm_free_lvb(lkb->lkb_lvbptr);
- free_lkb(lkb);
+ dlm_free_lkb(lkb);
}
}
dlm_astd_resume();
res_hashchain);
list_del(&rsb->res_hashchain);
- free_rsb(rsb);
+ dlm_free_rsb(rsb);
}
head = &ls->ls_rsbtbl[i].toss;
rsb = list_entry(head->next, struct dlm_rsb,
res_hashchain);
list_del(&rsb->res_hashchain);
- free_rsb(rsb);
+ dlm_free_rsb(rsb);
}
}
dlm_clear_members(ls);
dlm_clear_members_gone(ls);
kfree(ls->ls_node_array);
- kobject_unregister(&ls->ls_kobj);
- /* The ls structure will be freed when the kobject is done with */
+ kobject_put(&ls->ls_kobj);
+ /* The ls structure will be freed when the kobject is done with */
mutex_lock(&ls_lock);
ls_count--;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff