950 lines
24 KiB
C
950 lines
24 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* dlmcommon.h
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*
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* Copyright (C) 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*
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*/
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#ifndef DLMCOMMON_H
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#define DLMCOMMON_H
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#include <linux/kref.h>
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#define DLM_HB_NODE_DOWN_PRI (0xf000000)
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#define DLM_HB_NODE_UP_PRI (0x8000000)
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#define DLM_LOCKID_NAME_MAX 32
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#define DLM_DOMAIN_NAME_MAX_LEN 255
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#define DLM_LOCK_RES_OWNER_UNKNOWN O2NM_MAX_NODES
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#define DLM_THREAD_SHUFFLE_INTERVAL 5 // flush everything every 5 passes
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#define DLM_THREAD_MS 200 // flush at least every 200 ms
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#define DLM_HASH_SIZE_DEFAULT (1 << 14)
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#if DLM_HASH_SIZE_DEFAULT < PAGE_SIZE
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# define DLM_HASH_PAGES 1
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#else
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# define DLM_HASH_PAGES (DLM_HASH_SIZE_DEFAULT / PAGE_SIZE)
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#endif
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#define DLM_BUCKETS_PER_PAGE (PAGE_SIZE / sizeof(struct hlist_head))
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#define DLM_HASH_BUCKETS (DLM_HASH_PAGES * DLM_BUCKETS_PER_PAGE)
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/* Intended to make it easier for us to switch out hash functions */
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#define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l)
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enum dlm_ast_type {
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DLM_AST = 0,
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DLM_BAST,
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DLM_ASTUNLOCK
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};
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#define LKM_VALID_FLAGS (LKM_VALBLK | LKM_CONVERT | LKM_UNLOCK | \
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LKM_CANCEL | LKM_INVVALBLK | LKM_FORCE | \
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LKM_RECOVERY | LKM_LOCAL | LKM_NOQUEUE)
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#define DLM_RECOVERY_LOCK_NAME "$RECOVERY"
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#define DLM_RECOVERY_LOCK_NAME_LEN 9
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static inline int dlm_is_recovery_lock(const char *lock_name, int name_len)
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{
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if (name_len == DLM_RECOVERY_LOCK_NAME_LEN &&
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memcmp(lock_name, DLM_RECOVERY_LOCK_NAME, name_len)==0)
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return 1;
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return 0;
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}
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#define DLM_RECO_STATE_ACTIVE 0x0001
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#define DLM_RECO_STATE_FINALIZE 0x0002
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struct dlm_recovery_ctxt
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{
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struct list_head resources;
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struct list_head received;
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struct list_head node_data;
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u8 new_master;
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u8 dead_node;
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u16 state;
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unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
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wait_queue_head_t event;
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};
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enum dlm_ctxt_state {
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DLM_CTXT_NEW = 0,
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DLM_CTXT_JOINED,
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DLM_CTXT_IN_SHUTDOWN,
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DLM_CTXT_LEAVING,
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};
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struct dlm_ctxt
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{
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struct list_head list;
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struct hlist_head **lockres_hash;
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struct list_head dirty_list;
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struct list_head purge_list;
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struct list_head pending_asts;
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struct list_head pending_basts;
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unsigned int purge_count;
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spinlock_t spinlock;
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spinlock_t ast_lock;
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char *name;
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u8 node_num;
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u32 key;
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u8 joining_node;
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wait_queue_head_t dlm_join_events;
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unsigned long live_nodes_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
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unsigned long domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
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unsigned long recovery_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
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struct dlm_recovery_ctxt reco;
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spinlock_t master_lock;
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struct list_head master_list;
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struct list_head mle_hb_events;
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/* these give a really vague idea of the system load */
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atomic_t local_resources;
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atomic_t remote_resources;
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atomic_t unknown_resources;
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/* NOTE: Next three are protected by dlm_domain_lock */
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struct kref dlm_refs;
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enum dlm_ctxt_state dlm_state;
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unsigned int num_joins;
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struct o2hb_callback_func dlm_hb_up;
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struct o2hb_callback_func dlm_hb_down;
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struct task_struct *dlm_thread_task;
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struct task_struct *dlm_reco_thread_task;
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struct workqueue_struct *dlm_worker;
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wait_queue_head_t dlm_thread_wq;
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wait_queue_head_t dlm_reco_thread_wq;
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wait_queue_head_t ast_wq;
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wait_queue_head_t migration_wq;
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struct work_struct dispatched_work;
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struct list_head work_list;
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spinlock_t work_lock;
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struct list_head dlm_domain_handlers;
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struct list_head dlm_eviction_callbacks;
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};
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static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i)
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{
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return dlm->lockres_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + (i % DLM_BUCKETS_PER_PAGE);
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}
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/* these keventd work queue items are for less-frequently
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* called functions that cannot be directly called from the
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* net message handlers for some reason, usually because
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* they need to send net messages of their own. */
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void dlm_dispatch_work(struct work_struct *work);
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struct dlm_lock_resource;
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struct dlm_work_item;
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typedef void (dlm_workfunc_t)(struct dlm_work_item *, void *);
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struct dlm_request_all_locks_priv
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{
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u8 reco_master;
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u8 dead_node;
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};
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struct dlm_mig_lockres_priv
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{
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struct dlm_lock_resource *lockres;
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u8 real_master;
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};
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struct dlm_assert_master_priv
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{
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struct dlm_lock_resource *lockres;
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u8 request_from;
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u32 flags;
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unsigned ignore_higher:1;
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};
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struct dlm_work_item
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{
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struct list_head list;
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dlm_workfunc_t *func;
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struct dlm_ctxt *dlm;
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void *data;
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union {
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struct dlm_request_all_locks_priv ral;
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struct dlm_mig_lockres_priv ml;
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struct dlm_assert_master_priv am;
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} u;
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};
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static inline void dlm_init_work_item(struct dlm_ctxt *dlm,
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struct dlm_work_item *i,
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dlm_workfunc_t *f, void *data)
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{
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memset(i, 0, sizeof(*i));
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i->func = f;
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INIT_LIST_HEAD(&i->list);
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i->data = data;
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i->dlm = dlm; /* must have already done a dlm_grab on this! */
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}
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static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm,
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u8 node)
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{
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assert_spin_locked(&dlm->spinlock);
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dlm->joining_node = node;
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wake_up(&dlm->dlm_join_events);
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}
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#define DLM_LOCK_RES_UNINITED 0x00000001
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#define DLM_LOCK_RES_RECOVERING 0x00000002
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#define DLM_LOCK_RES_READY 0x00000004
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#define DLM_LOCK_RES_DIRTY 0x00000008
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#define DLM_LOCK_RES_IN_PROGRESS 0x00000010
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#define DLM_LOCK_RES_MIGRATING 0x00000020
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/* max milliseconds to wait to sync up a network failure with a node death */
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#define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
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#define DLM_PURGE_INTERVAL_MS (8 * 1000)
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struct dlm_lock_resource
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{
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/* WARNING: Please see the comment in dlm_init_lockres before
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* adding fields here. */
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struct hlist_node hash_node;
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struct qstr lockname;
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struct kref refs;
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/*
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* Please keep granted, converting, and blocked in this order,
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* as some funcs want to iterate over all lists.
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*
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* All four lists are protected by the hash's reference.
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*/
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struct list_head granted;
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struct list_head converting;
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struct list_head blocked;
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struct list_head purge;
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/*
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* These two lists require you to hold an additional reference
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* while they are on the list.
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*/
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struct list_head dirty;
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struct list_head recovering; // dlm_recovery_ctxt.resources list
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/* unused lock resources have their last_used stamped and are
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* put on a list for the dlm thread to run. */
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unsigned long last_used;
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unsigned migration_pending:1;
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atomic_t asts_reserved;
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spinlock_t spinlock;
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wait_queue_head_t wq;
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u8 owner; //node which owns the lock resource, or unknown
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u16 state;
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char lvb[DLM_LVB_LEN];
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};
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struct dlm_migratable_lock
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{
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__be64 cookie;
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/* these 3 are just padding for the in-memory structure, but
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* list and flags are actually used when sent over the wire */
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__be16 pad1;
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u8 list; // 0=granted, 1=converting, 2=blocked
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u8 flags;
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s8 type;
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s8 convert_type;
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s8 highest_blocked;
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u8 node;
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}; // 16 bytes
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struct dlm_lock
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{
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struct dlm_migratable_lock ml;
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struct list_head list;
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struct list_head ast_list;
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struct list_head bast_list;
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struct dlm_lock_resource *lockres;
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spinlock_t spinlock;
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struct kref lock_refs;
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// ast and bast must be callable while holding a spinlock!
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dlm_astlockfunc_t *ast;
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dlm_bastlockfunc_t *bast;
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void *astdata;
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struct dlm_lockstatus *lksb;
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unsigned ast_pending:1,
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bast_pending:1,
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convert_pending:1,
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lock_pending:1,
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cancel_pending:1,
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unlock_pending:1,
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lksb_kernel_allocated:1;
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};
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#define DLM_LKSB_UNUSED1 0x01
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#define DLM_LKSB_PUT_LVB 0x02
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#define DLM_LKSB_GET_LVB 0x04
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#define DLM_LKSB_UNUSED2 0x08
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#define DLM_LKSB_UNUSED3 0x10
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#define DLM_LKSB_UNUSED4 0x20
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#define DLM_LKSB_UNUSED5 0x40
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#define DLM_LKSB_UNUSED6 0x80
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enum dlm_lockres_list {
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DLM_GRANTED_LIST = 0,
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DLM_CONVERTING_LIST,
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DLM_BLOCKED_LIST
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};
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static inline int dlm_lvb_is_empty(char *lvb)
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{
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int i;
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for (i=0; i<DLM_LVB_LEN; i++)
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if (lvb[i])
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return 0;
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return 1;
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}
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static inline struct list_head *
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dlm_list_idx_to_ptr(struct dlm_lock_resource *res, enum dlm_lockres_list idx)
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{
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struct list_head *ret = NULL;
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if (idx == DLM_GRANTED_LIST)
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ret = &res->granted;
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else if (idx == DLM_CONVERTING_LIST)
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ret = &res->converting;
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else if (idx == DLM_BLOCKED_LIST)
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ret = &res->blocked;
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else
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BUG();
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return ret;
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}
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struct dlm_node_iter
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{
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unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
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int curnode;
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};
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enum {
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DLM_MASTER_REQUEST_MSG = 500,
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DLM_UNUSED_MSG1, /* 501 */
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DLM_ASSERT_MASTER_MSG, /* 502 */
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DLM_CREATE_LOCK_MSG, /* 503 */
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DLM_CONVERT_LOCK_MSG, /* 504 */
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DLM_PROXY_AST_MSG, /* 505 */
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DLM_UNLOCK_LOCK_MSG, /* 506 */
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DLM_UNUSED_MSG2, /* 507 */
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DLM_MIGRATE_REQUEST_MSG, /* 508 */
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DLM_MIG_LOCKRES_MSG, /* 509 */
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DLM_QUERY_JOIN_MSG, /* 510 */
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DLM_ASSERT_JOINED_MSG, /* 511 */
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DLM_CANCEL_JOIN_MSG, /* 512 */
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DLM_EXIT_DOMAIN_MSG, /* 513 */
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DLM_MASTER_REQUERY_MSG, /* 514 */
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DLM_LOCK_REQUEST_MSG, /* 515 */
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DLM_RECO_DATA_DONE_MSG, /* 516 */
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DLM_BEGIN_RECO_MSG, /* 517 */
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DLM_FINALIZE_RECO_MSG /* 518 */
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};
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struct dlm_reco_node_data
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{
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int state;
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u8 node_num;
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struct list_head list;
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};
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enum {
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DLM_RECO_NODE_DATA_DEAD = -1,
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DLM_RECO_NODE_DATA_INIT = 0,
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DLM_RECO_NODE_DATA_REQUESTING,
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DLM_RECO_NODE_DATA_REQUESTED,
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DLM_RECO_NODE_DATA_RECEIVING,
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DLM_RECO_NODE_DATA_DONE,
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DLM_RECO_NODE_DATA_FINALIZE_SENT,
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};
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enum {
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DLM_MASTER_RESP_NO = 0,
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DLM_MASTER_RESP_YES,
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DLM_MASTER_RESP_MAYBE,
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DLM_MASTER_RESP_ERROR
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};
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struct dlm_master_request
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{
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u8 node_idx;
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u8 namelen;
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__be16 pad1;
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__be32 flags;
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u8 name[O2NM_MAX_NAME_LEN];
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};
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#define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001
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#define DLM_ASSERT_MASTER_REQUERY 0x00000002
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#define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004
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struct dlm_assert_master
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{
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u8 node_idx;
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u8 namelen;
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__be16 pad1;
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__be32 flags;
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u8 name[O2NM_MAX_NAME_LEN];
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};
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struct dlm_migrate_request
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{
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u8 master;
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u8 new_master;
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u8 namelen;
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u8 pad1;
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__be32 pad2;
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u8 name[O2NM_MAX_NAME_LEN];
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};
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struct dlm_master_requery
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{
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u8 pad1;
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u8 pad2;
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u8 node_idx;
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u8 namelen;
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__be32 pad3;
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u8 name[O2NM_MAX_NAME_LEN];
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};
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#define DLM_MRES_RECOVERY 0x01
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#define DLM_MRES_MIGRATION 0x02
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#define DLM_MRES_ALL_DONE 0x04
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/*
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* We would like to get one whole lockres into a single network
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* message whenever possible. Generally speaking, there will be
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* at most one dlm_lock on a lockres for each node in the cluster,
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* plus (infrequently) any additional locks coming in from userdlm.
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*
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* struct _dlm_lockres_page
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* {
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* dlm_migratable_lockres mres;
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* dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS];
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* u8 pad[DLM_MIG_LOCKRES_RESERVED];
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* };
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*
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* from ../cluster/tcp.h
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* NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg))
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* (roughly 4080 bytes)
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* and sizeof(dlm_migratable_lockres) = 112 bytes
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* and sizeof(dlm_migratable_lock) = 16 bytes
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*
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* Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and
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* DLM_MIG_LOCKRES_RESERVED=128 means we have this:
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*
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* (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) +
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* sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED =
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* NET_MAX_PAYLOAD_BYTES
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* (240 * 16) + 112 + 128 = 4080
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*
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* So a lockres would need more than 240 locks before it would
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* use more than one network packet to recover. Not too bad.
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*/
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#define DLM_MAX_MIGRATABLE_LOCKS 240
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struct dlm_migratable_lockres
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{
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u8 master;
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u8 lockname_len;
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u8 num_locks; // locks sent in this structure
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u8 flags;
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__be32 total_locks; // locks to be sent for this migration cookie
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__be64 mig_cookie; // cookie for this lockres migration
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// or zero if not needed
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// 16 bytes
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u8 lockname[DLM_LOCKID_NAME_MAX];
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// 48 bytes
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u8 lvb[DLM_LVB_LEN];
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// 112 bytes
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struct dlm_migratable_lock ml[0]; // 16 bytes each, begins at byte 112
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};
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#define DLM_MIG_LOCKRES_MAX_LEN \
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(sizeof(struct dlm_migratable_lockres) + \
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(sizeof(struct dlm_migratable_lock) * \
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DLM_MAX_MIGRATABLE_LOCKS) )
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/* from above, 128 bytes
|
|
* for some undetermined future use */
|
|
#define DLM_MIG_LOCKRES_RESERVED (NET_MAX_PAYLOAD_BYTES - \
|
|
DLM_MIG_LOCKRES_MAX_LEN)
|
|
|
|
struct dlm_create_lock
|
|
{
|
|
__be64 cookie;
|
|
|
|
__be32 flags;
|
|
u8 pad1;
|
|
u8 node_idx;
|
|
s8 requested_type;
|
|
u8 namelen;
|
|
|
|
u8 name[O2NM_MAX_NAME_LEN];
|
|
};
|
|
|
|
struct dlm_convert_lock
|
|
{
|
|
__be64 cookie;
|
|
|
|
__be32 flags;
|
|
u8 pad1;
|
|
u8 node_idx;
|
|
s8 requested_type;
|
|
u8 namelen;
|
|
|
|
u8 name[O2NM_MAX_NAME_LEN];
|
|
|
|
s8 lvb[0];
|
|
};
|
|
#define DLM_CONVERT_LOCK_MAX_LEN (sizeof(struct dlm_convert_lock)+DLM_LVB_LEN)
|
|
|
|
struct dlm_unlock_lock
|
|
{
|
|
__be64 cookie;
|
|
|
|
__be32 flags;
|
|
__be16 pad1;
|
|
u8 node_idx;
|
|
u8 namelen;
|
|
|
|
u8 name[O2NM_MAX_NAME_LEN];
|
|
|
|
s8 lvb[0];
|
|
};
|
|
#define DLM_UNLOCK_LOCK_MAX_LEN (sizeof(struct dlm_unlock_lock)+DLM_LVB_LEN)
|
|
|
|
struct dlm_proxy_ast
|
|
{
|
|
__be64 cookie;
|
|
|
|
__be32 flags;
|
|
u8 node_idx;
|
|
u8 type;
|
|
u8 blocked_type;
|
|
u8 namelen;
|
|
|
|
u8 name[O2NM_MAX_NAME_LEN];
|
|
|
|
s8 lvb[0];
|
|
};
|
|
#define DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN)
|
|
|
|
#define DLM_MOD_KEY (0x666c6172)
|
|
enum dlm_query_join_response {
|
|
JOIN_DISALLOW = 0,
|
|
JOIN_OK,
|
|
JOIN_OK_NO_MAP,
|
|
};
|
|
|
|
struct dlm_lock_request
|
|
{
|
|
u8 node_idx;
|
|
u8 dead_node;
|
|
__be16 pad1;
|
|
__be32 pad2;
|
|
};
|
|
|
|
struct dlm_reco_data_done
|
|
{
|
|
u8 node_idx;
|
|
u8 dead_node;
|
|
__be16 pad1;
|
|
__be32 pad2;
|
|
|
|
/* unused for now */
|
|
/* eventually we can use this to attempt
|
|
* lvb recovery based on each node's info */
|
|
u8 reco_lvb[DLM_LVB_LEN];
|
|
};
|
|
|
|
struct dlm_begin_reco
|
|
{
|
|
u8 node_idx;
|
|
u8 dead_node;
|
|
__be16 pad1;
|
|
__be32 pad2;
|
|
};
|
|
|
|
|
|
struct dlm_query_join_request
|
|
{
|
|
u8 node_idx;
|
|
u8 pad1[2];
|
|
u8 name_len;
|
|
u8 domain[O2NM_MAX_NAME_LEN];
|
|
};
|
|
|
|
struct dlm_assert_joined
|
|
{
|
|
u8 node_idx;
|
|
u8 pad1[2];
|
|
u8 name_len;
|
|
u8 domain[O2NM_MAX_NAME_LEN];
|
|
};
|
|
|
|
struct dlm_cancel_join
|
|
{
|
|
u8 node_idx;
|
|
u8 pad1[2];
|
|
u8 name_len;
|
|
u8 domain[O2NM_MAX_NAME_LEN];
|
|
};
|
|
|
|
struct dlm_exit_domain
|
|
{
|
|
u8 node_idx;
|
|
u8 pad1[3];
|
|
};
|
|
|
|
struct dlm_finalize_reco
|
|
{
|
|
u8 node_idx;
|
|
u8 dead_node;
|
|
u8 flags;
|
|
u8 pad1;
|
|
__be32 pad2;
|
|
};
|
|
|
|
static inline enum dlm_status
|
|
__dlm_lockres_state_to_status(struct dlm_lock_resource *res)
|
|
{
|
|
enum dlm_status status = DLM_NORMAL;
|
|
|
|
assert_spin_locked(&res->spinlock);
|
|
|
|
if (res->state & DLM_LOCK_RES_RECOVERING)
|
|
status = DLM_RECOVERING;
|
|
else if (res->state & DLM_LOCK_RES_MIGRATING)
|
|
status = DLM_MIGRATING;
|
|
else if (res->state & DLM_LOCK_RES_IN_PROGRESS)
|
|
status = DLM_FORWARD;
|
|
|
|
return status;
|
|
}
|
|
|
|
static inline u8 dlm_get_lock_cookie_node(u64 cookie)
|
|
{
|
|
u8 ret;
|
|
cookie >>= 56;
|
|
ret = (u8)(cookie & 0xffULL);
|
|
return ret;
|
|
}
|
|
|
|
static inline unsigned long long dlm_get_lock_cookie_seq(u64 cookie)
|
|
{
|
|
unsigned long long ret;
|
|
ret = ((unsigned long long)cookie) & 0x00ffffffffffffffULL;
|
|
return ret;
|
|
}
|
|
|
|
struct dlm_lock * dlm_new_lock(int type, u8 node, u64 cookie,
|
|
struct dlm_lockstatus *lksb);
|
|
void dlm_lock_get(struct dlm_lock *lock);
|
|
void dlm_lock_put(struct dlm_lock *lock);
|
|
|
|
void dlm_lock_attach_lockres(struct dlm_lock *lock,
|
|
struct dlm_lock_resource *res);
|
|
|
|
int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
|
|
void dlm_revert_pending_convert(struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock);
|
|
void dlm_revert_pending_lock(struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock);
|
|
|
|
int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
void dlm_commit_pending_cancel(struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock);
|
|
void dlm_commit_pending_unlock(struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock);
|
|
|
|
int dlm_launch_thread(struct dlm_ctxt *dlm);
|
|
void dlm_complete_thread(struct dlm_ctxt *dlm);
|
|
int dlm_launch_recovery_thread(struct dlm_ctxt *dlm);
|
|
void dlm_complete_recovery_thread(struct dlm_ctxt *dlm);
|
|
void dlm_wait_for_recovery(struct dlm_ctxt *dlm);
|
|
void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
|
|
int dlm_is_node_dead(struct dlm_ctxt *dlm, u8 node);
|
|
int dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout);
|
|
int dlm_wait_for_node_recovery(struct dlm_ctxt *dlm, u8 node, int timeout);
|
|
|
|
void dlm_put(struct dlm_ctxt *dlm);
|
|
struct dlm_ctxt *dlm_grab(struct dlm_ctxt *dlm);
|
|
int dlm_domain_fully_joined(struct dlm_ctxt *dlm);
|
|
|
|
void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res);
|
|
void dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res);
|
|
void dlm_purge_lockres(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *lockres);
|
|
static inline void dlm_lockres_get(struct dlm_lock_resource *res)
|
|
{
|
|
/* This is called on every lookup, so it might be worth
|
|
* inlining. */
|
|
kref_get(&res->refs);
|
|
}
|
|
void dlm_lockres_put(struct dlm_lock_resource *res);
|
|
void __dlm_unhash_lockres(struct dlm_lock_resource *res);
|
|
void __dlm_insert_lockres(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res);
|
|
struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm,
|
|
const char *name,
|
|
unsigned int len,
|
|
unsigned int hash);
|
|
struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm,
|
|
const char *name,
|
|
unsigned int len);
|
|
|
|
int dlm_is_host_down(int errno);
|
|
void dlm_change_lockres_owner(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
u8 owner);
|
|
struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
|
|
const char *lockid,
|
|
int namelen,
|
|
int flags);
|
|
struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
|
|
const char *name,
|
|
unsigned int namelen);
|
|
|
|
void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock);
|
|
void dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock);
|
|
void dlm_do_local_ast(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock);
|
|
int dlm_do_remote_ast(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock);
|
|
void dlm_do_local_bast(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock,
|
|
int blocked_type);
|
|
int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock,
|
|
int msg_type,
|
|
int blocked_type, int flags);
|
|
static inline int dlm_send_proxy_bast(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock,
|
|
int blocked_type)
|
|
{
|
|
return dlm_send_proxy_ast_msg(dlm, res, lock, DLM_BAST,
|
|
blocked_type, 0);
|
|
}
|
|
|
|
static inline int dlm_send_proxy_ast(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
struct dlm_lock *lock,
|
|
int flags)
|
|
{
|
|
return dlm_send_proxy_ast_msg(dlm, res, lock, DLM_AST,
|
|
0, flags);
|
|
}
|
|
|
|
void dlm_print_one_lock_resource(struct dlm_lock_resource *res);
|
|
void __dlm_print_one_lock_resource(struct dlm_lock_resource *res);
|
|
|
|
u8 dlm_nm_this_node(struct dlm_ctxt *dlm);
|
|
void dlm_kick_thread(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
|
|
void __dlm_dirty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
|
|
|
|
|
|
int dlm_nm_init(struct dlm_ctxt *dlm);
|
|
int dlm_heartbeat_init(struct dlm_ctxt *dlm);
|
|
void dlm_hb_node_down_cb(struct o2nm_node *node, int idx, void *data);
|
|
void dlm_hb_node_up_cb(struct o2nm_node *node, int idx, void *data);
|
|
|
|
int dlm_lockres_is_dirty(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
|
|
int dlm_migrate_lockres(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
u8 target);
|
|
int dlm_finish_migration(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
u8 old_master);
|
|
void dlm_lockres_release_ast(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res);
|
|
void __dlm_lockres_reserve_ast(struct dlm_lock_resource *res);
|
|
|
|
int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data);
|
|
int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
|
|
u8 nodenum, u8 *real_master);
|
|
|
|
|
|
int dlm_dispatch_assert_master(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
int ignore_higher,
|
|
u8 request_from,
|
|
u32 flags);
|
|
|
|
|
|
int dlm_send_one_lockres(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res,
|
|
struct dlm_migratable_lockres *mres,
|
|
u8 send_to,
|
|
u8 flags);
|
|
void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm,
|
|
struct dlm_lock_resource *res);
|
|
|
|
/* will exit holding res->spinlock, but may drop in function */
|
|
void __dlm_wait_on_lockres_flags(struct dlm_lock_resource *res, int flags);
|
|
void __dlm_wait_on_lockres_flags_set(struct dlm_lock_resource *res, int flags);
|
|
|
|
/* will exit holding res->spinlock, but may drop in function */
|
|
static inline void __dlm_wait_on_lockres(struct dlm_lock_resource *res)
|
|
{
|
|
__dlm_wait_on_lockres_flags(res, (DLM_LOCK_RES_IN_PROGRESS|
|
|
DLM_LOCK_RES_RECOVERING|
|
|
DLM_LOCK_RES_MIGRATING));
|
|
}
|
|
|
|
|
|
int dlm_init_mle_cache(void);
|
|
void dlm_destroy_mle_cache(void);
|
|
void dlm_hb_event_notify_attached(struct dlm_ctxt *dlm, int idx, int node_up);
|
|
void dlm_clean_master_list(struct dlm_ctxt *dlm,
|
|
u8 dead_node);
|
|
int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock);
|
|
|
|
int __dlm_lockres_unused(struct dlm_lock_resource *res);
|
|
|
|
static inline const char * dlm_lock_mode_name(int mode)
|
|
{
|
|
switch (mode) {
|
|
case LKM_EXMODE:
|
|
return "EX";
|
|
case LKM_PRMODE:
|
|
return "PR";
|
|
case LKM_NLMODE:
|
|
return "NL";
|
|
}
|
|
return "UNKNOWN";
|
|
}
|
|
|
|
|
|
static inline int dlm_lock_compatible(int existing, int request)
|
|
{
|
|
/* NO_LOCK compatible with all */
|
|
if (request == LKM_NLMODE ||
|
|
existing == LKM_NLMODE)
|
|
return 1;
|
|
|
|
/* EX incompatible with all non-NO_LOCK */
|
|
if (request == LKM_EXMODE)
|
|
return 0;
|
|
|
|
/* request must be PR, which is compatible with PR */
|
|
if (existing == LKM_PRMODE)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int dlm_lock_on_list(struct list_head *head,
|
|
struct dlm_lock *lock)
|
|
{
|
|
struct list_head *iter;
|
|
struct dlm_lock *tmplock;
|
|
|
|
list_for_each(iter, head) {
|
|
tmplock = list_entry(iter, struct dlm_lock, list);
|
|
if (tmplock == lock)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static inline enum dlm_status dlm_err_to_dlm_status(int err)
|
|
{
|
|
enum dlm_status ret;
|
|
if (err == -ENOMEM)
|
|
ret = DLM_SYSERR;
|
|
else if (err == -ETIMEDOUT || o2net_link_down(err, NULL))
|
|
ret = DLM_NOLOCKMGR;
|
|
else if (err == -EINVAL)
|
|
ret = DLM_BADPARAM;
|
|
else if (err == -ENAMETOOLONG)
|
|
ret = DLM_IVBUFLEN;
|
|
else
|
|
ret = DLM_BADARGS;
|
|
return ret;
|
|
}
|
|
|
|
|
|
static inline void dlm_node_iter_init(unsigned long *map,
|
|
struct dlm_node_iter *iter)
|
|
{
|
|
memcpy(iter->node_map, map, sizeof(iter->node_map));
|
|
iter->curnode = -1;
|
|
}
|
|
|
|
static inline int dlm_node_iter_next(struct dlm_node_iter *iter)
|
|
{
|
|
int bit;
|
|
bit = find_next_bit(iter->node_map, O2NM_MAX_NODES, iter->curnode+1);
|
|
if (bit >= O2NM_MAX_NODES) {
|
|
iter->curnode = O2NM_MAX_NODES;
|
|
return -ENOENT;
|
|
}
|
|
iter->curnode = bit;
|
|
return bit;
|
|
}
|
|
|
|
|
|
|
|
#endif /* DLMCOMMON_H */
|