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-rw-r--r--ANDROID_3.4.5/fs/ocfs2/dlm/dlmcommon.h1149
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diff --git a/ANDROID_3.4.5/fs/ocfs2/dlm/dlmcommon.h b/ANDROID_3.4.5/fs/ocfs2/dlm/dlmcommon.h
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--- a/ANDROID_3.4.5/fs/ocfs2/dlm/dlmcommon.h
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@@ -1,1149 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * dlmcommon.h
- *
- * Copyright (C) 2004 Oracle. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
- */
-
-#ifndef DLMCOMMON_H
-#define DLMCOMMON_H
-
-#include <linux/kref.h>
-
-#define DLM_HB_NODE_DOWN_PRI (0xf000000)
-#define DLM_HB_NODE_UP_PRI (0x8000000)
-
-#define DLM_LOCKID_NAME_MAX 32
-
-#define DLM_DOMAIN_NAME_MAX_LEN 255
-#define DLM_LOCK_RES_OWNER_UNKNOWN O2NM_MAX_NODES
-#define DLM_THREAD_SHUFFLE_INTERVAL 5 // flush everything every 5 passes
-#define DLM_THREAD_MS 200 // flush at least every 200 ms
-
-#define DLM_HASH_SIZE_DEFAULT (1 << 17)
-#if DLM_HASH_SIZE_DEFAULT < PAGE_SIZE
-# define DLM_HASH_PAGES 1
-#else
-# define DLM_HASH_PAGES (DLM_HASH_SIZE_DEFAULT / PAGE_SIZE)
-#endif
-#define DLM_BUCKETS_PER_PAGE (PAGE_SIZE / sizeof(struct hlist_head))
-#define DLM_HASH_BUCKETS (DLM_HASH_PAGES * DLM_BUCKETS_PER_PAGE)
-
-/* Intended to make it easier for us to switch out hash functions */
-#define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l)
-
-enum dlm_mle_type {
- DLM_MLE_BLOCK = 0,
- DLM_MLE_MASTER = 1,
- DLM_MLE_MIGRATION = 2,
- DLM_MLE_NUM_TYPES = 3,
-};
-
-struct dlm_master_list_entry {
- struct hlist_node master_hash_node;
- struct list_head hb_events;
- struct dlm_ctxt *dlm;
- spinlock_t spinlock;
- wait_queue_head_t wq;
- atomic_t woken;
- struct kref mle_refs;
- int inuse;
- unsigned long maybe_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- unsigned long vote_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- unsigned long response_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- u8 master;
- u8 new_master;
- enum dlm_mle_type type;
- struct o2hb_callback_func mle_hb_up;
- struct o2hb_callback_func mle_hb_down;
- struct dlm_lock_resource *mleres;
- unsigned char mname[DLM_LOCKID_NAME_MAX];
- unsigned int mnamelen;
- unsigned int mnamehash;
-};
-
-enum dlm_ast_type {
- DLM_AST = 0,
- DLM_BAST = 1,
- DLM_ASTUNLOCK = 2,
-};
-
-
-#define LKM_VALID_FLAGS (LKM_VALBLK | LKM_CONVERT | LKM_UNLOCK | \
- LKM_CANCEL | LKM_INVVALBLK | LKM_FORCE | \
- LKM_RECOVERY | LKM_LOCAL | LKM_NOQUEUE)
-
-#define DLM_RECOVERY_LOCK_NAME "$RECOVERY"
-#define DLM_RECOVERY_LOCK_NAME_LEN 9
-
-static inline int dlm_is_recovery_lock(const char *lock_name, int name_len)
-{
- if (name_len == DLM_RECOVERY_LOCK_NAME_LEN &&
- memcmp(lock_name, DLM_RECOVERY_LOCK_NAME, name_len)==0)
- return 1;
- return 0;
-}
-
-#define DLM_RECO_STATE_ACTIVE 0x0001
-#define DLM_RECO_STATE_FINALIZE 0x0002
-
-struct dlm_recovery_ctxt
-{
- struct list_head resources;
- struct list_head received;
- struct list_head node_data;
- u8 new_master;
- u8 dead_node;
- u16 state;
- unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- wait_queue_head_t event;
-};
-
-enum dlm_ctxt_state {
- DLM_CTXT_NEW = 0,
- DLM_CTXT_JOINED = 1,
- DLM_CTXT_IN_SHUTDOWN = 2,
- DLM_CTXT_LEAVING = 3,
-};
-
-struct dlm_ctxt
-{
- struct list_head list;
- struct hlist_head **lockres_hash;
- struct list_head dirty_list;
- struct list_head purge_list;
- struct list_head pending_asts;
- struct list_head pending_basts;
- struct list_head tracking_list;
- unsigned int purge_count;
- spinlock_t spinlock;
- spinlock_t ast_lock;
- spinlock_t track_lock;
- char *name;
- u8 node_num;
- u32 key;
- u8 joining_node;
- wait_queue_head_t dlm_join_events;
- unsigned long live_nodes_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- unsigned long domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- unsigned long exit_domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- unsigned long recovery_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- struct dlm_recovery_ctxt reco;
- spinlock_t master_lock;
- struct hlist_head **master_hash;
- struct list_head mle_hb_events;
-
- /* these give a really vague idea of the system load */
- atomic_t mle_tot_count[DLM_MLE_NUM_TYPES];
- atomic_t mle_cur_count[DLM_MLE_NUM_TYPES];
- atomic_t res_tot_count;
- atomic_t res_cur_count;
-
- struct dlm_debug_ctxt *dlm_debug_ctxt;
- struct dentry *dlm_debugfs_subroot;
-
- /* NOTE: Next three are protected by dlm_domain_lock */
- struct kref dlm_refs;
- enum dlm_ctxt_state dlm_state;
- unsigned int num_joins;
-
- struct o2hb_callback_func dlm_hb_up;
- struct o2hb_callback_func dlm_hb_down;
- struct task_struct *dlm_thread_task;
- struct task_struct *dlm_reco_thread_task;
- struct workqueue_struct *dlm_worker;
- wait_queue_head_t dlm_thread_wq;
- wait_queue_head_t dlm_reco_thread_wq;
- wait_queue_head_t ast_wq;
- wait_queue_head_t migration_wq;
-
- struct work_struct dispatched_work;
- struct list_head work_list;
- spinlock_t work_lock;
- struct list_head dlm_domain_handlers;
- struct list_head dlm_eviction_callbacks;
-
- /* The filesystem specifies this at domain registration. We
- * cache it here to know what to tell other nodes. */
- struct dlm_protocol_version fs_locking_proto;
- /* This is the inter-dlm communication version */
- struct dlm_protocol_version dlm_locking_proto;
-};
-
-static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i)
-{
- return dlm->lockres_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + (i % DLM_BUCKETS_PER_PAGE);
-}
-
-static inline struct hlist_head *dlm_master_hash(struct dlm_ctxt *dlm,
- unsigned i)
-{
- return dlm->master_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] +
- (i % DLM_BUCKETS_PER_PAGE);
-}
-
-/* these keventd work queue items are for less-frequently
- * called functions that cannot be directly called from the
- * net message handlers for some reason, usually because
- * they need to send net messages of their own. */
-void dlm_dispatch_work(struct work_struct *work);
-
-struct dlm_lock_resource;
-struct dlm_work_item;
-
-typedef void (dlm_workfunc_t)(struct dlm_work_item *, void *);
-
-struct dlm_request_all_locks_priv
-{
- u8 reco_master;
- u8 dead_node;
-};
-
-struct dlm_mig_lockres_priv
-{
- struct dlm_lock_resource *lockres;
- u8 real_master;
- u8 extra_ref;
-};
-
-struct dlm_assert_master_priv
-{
- struct dlm_lock_resource *lockres;
- u8 request_from;
- u32 flags;
- unsigned ignore_higher:1;
-};
-
-struct dlm_deref_lockres_priv
-{
- struct dlm_lock_resource *deref_res;
- u8 deref_node;
-};
-
-struct dlm_work_item
-{
- struct list_head list;
- dlm_workfunc_t *func;
- struct dlm_ctxt *dlm;
- void *data;
- union {
- struct dlm_request_all_locks_priv ral;
- struct dlm_mig_lockres_priv ml;
- struct dlm_assert_master_priv am;
- struct dlm_deref_lockres_priv dl;
- } u;
-};
-
-static inline void dlm_init_work_item(struct dlm_ctxt *dlm,
- struct dlm_work_item *i,
- dlm_workfunc_t *f, void *data)
-{
- memset(i, 0, sizeof(*i));
- i->func = f;
- INIT_LIST_HEAD(&i->list);
- i->data = data;
- i->dlm = dlm; /* must have already done a dlm_grab on this! */
-}
-
-
-
-static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm,
- u8 node)
-{
- assert_spin_locked(&dlm->spinlock);
-
- dlm->joining_node = node;
- wake_up(&dlm->dlm_join_events);
-}
-
-#define DLM_LOCK_RES_UNINITED 0x00000001
-#define DLM_LOCK_RES_RECOVERING 0x00000002
-#define DLM_LOCK_RES_READY 0x00000004
-#define DLM_LOCK_RES_DIRTY 0x00000008
-#define DLM_LOCK_RES_IN_PROGRESS 0x00000010
-#define DLM_LOCK_RES_MIGRATING 0x00000020
-#define DLM_LOCK_RES_DROPPING_REF 0x00000040
-#define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000
-#define DLM_LOCK_RES_SETREF_INPROG 0x00002000
-
-/* max milliseconds to wait to sync up a network failure with a node death */
-#define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
-
-#define DLM_PURGE_INTERVAL_MS (8 * 1000)
-
-struct dlm_lock_resource
-{
- /* WARNING: Please see the comment in dlm_init_lockres before
- * adding fields here. */
- struct hlist_node hash_node;
- struct qstr lockname;
- struct kref refs;
-
- /*
- * Please keep granted, converting, and blocked in this order,
- * as some funcs want to iterate over all lists.
- *
- * All four lists are protected by the hash's reference.
- */
- struct list_head granted;
- struct list_head converting;
- struct list_head blocked;
- struct list_head purge;
-
- /*
- * These two lists require you to hold an additional reference
- * while they are on the list.
- */
- struct list_head dirty;
- struct list_head recovering; // dlm_recovery_ctxt.resources list
-
- /* Added during init and removed during release */
- struct list_head tracking; /* dlm->tracking_list */
-
- /* unused lock resources have their last_used stamped and are
- * put on a list for the dlm thread to run. */
- unsigned long last_used;
-
- struct dlm_ctxt *dlm;
-
- unsigned migration_pending:1;
- atomic_t asts_reserved;
- spinlock_t spinlock;
- wait_queue_head_t wq;
- u8 owner; //node which owns the lock resource, or unknown
- u16 state;
- char lvb[DLM_LVB_LEN];
- unsigned int inflight_locks;
- unsigned long refmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
-};
-
-struct dlm_migratable_lock
-{
- __be64 cookie;
-
- /* these 3 are just padding for the in-memory structure, but
- * list and flags are actually used when sent over the wire */
- __be16 pad1;
- u8 list; // 0=granted, 1=converting, 2=blocked
- u8 flags;
-
- s8 type;
- s8 convert_type;
- s8 highest_blocked;
- u8 node;
-}; // 16 bytes
-
-struct dlm_lock
-{
- struct dlm_migratable_lock ml;
-
- struct list_head list;
- struct list_head ast_list;
- struct list_head bast_list;
- struct dlm_lock_resource *lockres;
- spinlock_t spinlock;
- struct kref lock_refs;
-
- // ast and bast must be callable while holding a spinlock!
- dlm_astlockfunc_t *ast;
- dlm_bastlockfunc_t *bast;
- void *astdata;
- struct dlm_lockstatus *lksb;
- unsigned ast_pending:1,
- bast_pending:1,
- convert_pending:1,
- lock_pending:1,
- cancel_pending:1,
- unlock_pending:1,
- lksb_kernel_allocated:1;
-};
-
-
-#define DLM_LKSB_UNUSED1 0x01
-#define DLM_LKSB_PUT_LVB 0x02
-#define DLM_LKSB_GET_LVB 0x04
-#define DLM_LKSB_UNUSED2 0x08
-#define DLM_LKSB_UNUSED3 0x10
-#define DLM_LKSB_UNUSED4 0x20
-#define DLM_LKSB_UNUSED5 0x40
-#define DLM_LKSB_UNUSED6 0x80
-
-
-enum dlm_lockres_list {
- DLM_GRANTED_LIST = 0,
- DLM_CONVERTING_LIST = 1,
- DLM_BLOCKED_LIST = 2,
-};
-
-static inline int dlm_lvb_is_empty(char *lvb)
-{
- int i;
- for (i=0; i<DLM_LVB_LEN; i++)
- if (lvb[i])
- return 0;
- return 1;
-}
-
-static inline char *dlm_list_in_text(enum dlm_lockres_list idx)
-{
- if (idx == DLM_GRANTED_LIST)
- return "granted";
- else if (idx == DLM_CONVERTING_LIST)
- return "converting";
- else if (idx == DLM_BLOCKED_LIST)
- return "blocked";
- else
- return "unknown";
-}
-
-static inline struct list_head *
-dlm_list_idx_to_ptr(struct dlm_lock_resource *res, enum dlm_lockres_list idx)
-{
- struct list_head *ret = NULL;
- if (idx == DLM_GRANTED_LIST)
- ret = &res->granted;
- else if (idx == DLM_CONVERTING_LIST)
- ret = &res->converting;
- else if (idx == DLM_BLOCKED_LIST)
- ret = &res->blocked;
- else
- BUG();
- return ret;
-}
-
-
-
-
-struct dlm_node_iter
-{
- unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- int curnode;
-};
-
-
-enum {
- DLM_MASTER_REQUEST_MSG = 500,
- DLM_UNUSED_MSG1 = 501,
- DLM_ASSERT_MASTER_MSG = 502,
- DLM_CREATE_LOCK_MSG = 503,
- DLM_CONVERT_LOCK_MSG = 504,
- DLM_PROXY_AST_MSG = 505,
- DLM_UNLOCK_LOCK_MSG = 506,
- DLM_DEREF_LOCKRES_MSG = 507,
- DLM_MIGRATE_REQUEST_MSG = 508,
- DLM_MIG_LOCKRES_MSG = 509,
- DLM_QUERY_JOIN_MSG = 510,
- DLM_ASSERT_JOINED_MSG = 511,
- DLM_CANCEL_JOIN_MSG = 512,
- DLM_EXIT_DOMAIN_MSG = 513,
- DLM_MASTER_REQUERY_MSG = 514,
- DLM_LOCK_REQUEST_MSG = 515,
- DLM_RECO_DATA_DONE_MSG = 516,
- DLM_BEGIN_RECO_MSG = 517,
- DLM_FINALIZE_RECO_MSG = 518,
- DLM_QUERY_REGION = 519,
- DLM_QUERY_NODEINFO = 520,
- DLM_BEGIN_EXIT_DOMAIN_MSG = 521,
-};
-
-struct dlm_reco_node_data
-{
- int state;
- u8 node_num;
- struct list_head list;
-};
-
-enum {
- DLM_RECO_NODE_DATA_DEAD = -1,
- DLM_RECO_NODE_DATA_INIT = 0,
- DLM_RECO_NODE_DATA_REQUESTING = 1,
- DLM_RECO_NODE_DATA_REQUESTED = 2,
- DLM_RECO_NODE_DATA_RECEIVING = 3,
- DLM_RECO_NODE_DATA_DONE = 4,
- DLM_RECO_NODE_DATA_FINALIZE_SENT = 5,
-};
-
-
-enum {
- DLM_MASTER_RESP_NO = 0,
- DLM_MASTER_RESP_YES = 1,
- DLM_MASTER_RESP_MAYBE = 2,
- DLM_MASTER_RESP_ERROR = 3,
-};
-
-
-struct dlm_master_request
-{
- u8 node_idx;
- u8 namelen;
- __be16 pad1;
- __be32 flags;
-
- u8 name[O2NM_MAX_NAME_LEN];
-};
-
-#define DLM_ASSERT_RESPONSE_REASSERT 0x00000001
-#define DLM_ASSERT_RESPONSE_MASTERY_REF 0x00000002
-
-#define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001
-#define DLM_ASSERT_MASTER_REQUERY 0x00000002
-#define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004
-struct dlm_assert_master
-{
- u8 node_idx;
- u8 namelen;
- __be16 pad1;
- __be32 flags;
-
- u8 name[O2NM_MAX_NAME_LEN];
-};
-
-#define DLM_MIGRATE_RESPONSE_MASTERY_REF 0x00000001
-
-struct dlm_migrate_request
-{
- u8 master;
- u8 new_master;
- u8 namelen;
- u8 pad1;
- __be32 pad2;
- u8 name[O2NM_MAX_NAME_LEN];
-};
-
-struct dlm_master_requery
-{
- u8 pad1;
- u8 pad2;
- u8 node_idx;
- u8 namelen;
- __be32 pad3;
- u8 name[O2NM_MAX_NAME_LEN];
-};
-
-#define DLM_MRES_RECOVERY 0x01
-#define DLM_MRES_MIGRATION 0x02
-#define DLM_MRES_ALL_DONE 0x04
-
-/*
- * We would like to get one whole lockres into a single network
- * message whenever possible. Generally speaking, there will be
- * at most one dlm_lock on a lockres for each node in the cluster,
- * plus (infrequently) any additional locks coming in from userdlm.
- *
- * struct _dlm_lockres_page
- * {
- * dlm_migratable_lockres mres;
- * dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS];
- * u8 pad[DLM_MIG_LOCKRES_RESERVED];
- * };
- *
- * from ../cluster/tcp.h
- * NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg))
- * (roughly 4080 bytes)
- * and sizeof(dlm_migratable_lockres) = 112 bytes
- * and sizeof(dlm_migratable_lock) = 16 bytes
- *
- * Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and
- * DLM_MIG_LOCKRES_RESERVED=128 means we have this:
- *
- * (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) +
- * sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED =
- * NET_MAX_PAYLOAD_BYTES
- * (240 * 16) + 112 + 128 = 4080
- *
- * So a lockres would need more than 240 locks before it would
- * use more than one network packet to recover. Not too bad.
- */
-#define DLM_MAX_MIGRATABLE_LOCKS 240
-
-struct dlm_migratable_lockres
-{
- u8 master;
- u8 lockname_len;
- u8 num_locks; // locks sent in this structure
- u8 flags;
- __be32 total_locks; // locks to be sent for this migration cookie
- __be64 mig_cookie; // cookie for this lockres migration
- // or zero if not needed
- // 16 bytes
- u8 lockname[DLM_LOCKID_NAME_MAX];
- // 48 bytes
- u8 lvb[DLM_LVB_LEN];
- // 112 bytes
- struct dlm_migratable_lock ml[0]; // 16 bytes each, begins at byte 112
-};
-#define DLM_MIG_LOCKRES_MAX_LEN \
- (sizeof(struct dlm_migratable_lockres) + \
- (sizeof(struct dlm_migratable_lock) * \
- DLM_MAX_MIGRATABLE_LOCKS) )
-
-/* 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_code {
- JOIN_DISALLOW = 0,
- JOIN_OK = 1,
- JOIN_OK_NO_MAP = 2,
- JOIN_PROTOCOL_MISMATCH = 3,
-};
-
-struct dlm_query_join_packet {
- u8 code; /* Response code. dlm_minor and fs_minor
- are only valid if this is JOIN_OK */
- u8 dlm_minor; /* The minor version of the protocol the
- dlm is speaking. */
- u8 fs_minor; /* The minor version of the protocol the
- filesystem is speaking. */
- u8 reserved;
-};
-
-union dlm_query_join_response {
- u32 intval;
- struct dlm_query_join_packet packet;
-};
-
-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;
-};
-
-
-#define BITS_PER_BYTE 8
-#define BITS_TO_BYTES(bits) (((bits)+BITS_PER_BYTE-1)/BITS_PER_BYTE)
-
-struct dlm_query_join_request
-{
- u8 node_idx;
- u8 pad1[2];
- u8 name_len;
- struct dlm_protocol_version dlm_proto;
- struct dlm_protocol_version fs_proto;
- u8 domain[O2NM_MAX_NAME_LEN];
- u8 node_map[BITS_TO_BYTES(O2NM_MAX_NODES)];
-};
-
-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_query_region {
- u8 qr_node;
- u8 qr_numregions;
- u8 qr_namelen;
- u8 pad1;
- u8 qr_domain[O2NM_MAX_NAME_LEN];
- u8 qr_regions[O2HB_MAX_REGION_NAME_LEN * O2NM_MAX_REGIONS];
-};
-
-struct dlm_node_info {
- u8 ni_nodenum;
- u8 pad1;
- u16 ni_ipv4_port;
- u32 ni_ipv4_address;
-};
-
-struct dlm_query_nodeinfo {
- u8 qn_nodenum;
- u8 qn_numnodes;
- u8 qn_namelen;
- u8 pad1;
- u8 qn_domain[O2NM_MAX_NAME_LEN];
- struct dlm_node_info qn_nodes[O2NM_MAX_NODES];
-};
-
-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;
-};
-
-struct dlm_deref_lockres
-{
- u32 pad1;
- u16 pad2;
- u8 node_idx;
- u8 namelen;
-
- u8 name[O2NM_MAX_NAME_LEN];
-};
-
-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,
- void **ret_data);
-int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_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 **ret_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);
-void dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout);
-void 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);
-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_ctxt *dlm, 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_full(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,
- 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);
-
-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_lockres_set_refmap_bit(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res, int bit);
-void dlm_lockres_clear_refmap_bit(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res, int bit);
-
-void dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res);
-void dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res);
-
-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_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_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
-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,
- void **ret_data);
-int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-void dlm_assert_master_post_handler(int status, void *data, void *ret_data);
-int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_data);
-int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data,
- void **ret_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));
-}
-
-void __dlm_unlink_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle);
-void __dlm_insert_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle);
-
-/* create/destroy slab caches */
-int dlm_init_master_caches(void);
-void dlm_destroy_master_caches(void);
-
-int dlm_init_lock_cache(void);
-void dlm_destroy_lock_cache(void);
-
-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);
-int dlm_drop_lockres_ref(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res);
-void dlm_clean_master_list(struct dlm_ctxt *dlm,
- u8 dead_node);
-void dlm_force_free_mles(struct dlm_ctxt *dlm);
-int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock);
-int __dlm_lockres_has_locks(struct dlm_lock_resource *res);
-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;
-}
-
-static inline void dlm_set_lockres_owner(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res,
- u8 owner)
-{
- assert_spin_locked(&res->spinlock);
-
- res->owner = owner;
-}
-
-static inline void dlm_change_lockres_owner(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res,
- u8 owner)
-{
- assert_spin_locked(&res->spinlock);
-
- if (owner != res->owner)
- dlm_set_lockres_owner(dlm, res, owner);
-}
-
-#endif /* DLMCOMMON_H */
generated by cgit (git 2.34.1) at 2025-01-09 02:35:33 +0000