| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kurt Hackel | 3555 | 85.23% | 16 | 24.24% |
| Sunil Mushran | 363 | 8.70% | 24 | 36.36% |
| Daniel Phillips | 74 | 1.77% | 1 | 1.52% |
| Joel Becker | 64 | 1.53% | 3 | 4.55% |
| Jiufei (Joyce) Xue | 42 | 1.01% | 4 | 6.06% |
| Mark Fasheh | 36 | 0.86% | 4 | 6.06% |
| Srinivas Eeda | 6 | 0.14% | 2 | 3.03% |
| Jun Piao | 6 | 0.14% | 2 | 3.03% |
| Gustavo A. R. Silva | 4 | 0.10% | 1 | 1.52% |
| Dong Fang | 4 | 0.10% | 1 | 1.52% |
| Joseph Qi | 4 | 0.10% | 2 | 3.03% |
| Wengang Wang | 4 | 0.10% | 1 | 1.52% |
| David Howells | 3 | 0.07% | 1 | 1.52% |
| Al Viro | 3 | 0.07% | 1 | 1.52% |
| Masahiro Yamada | 1 | 0.02% | 1 | 1.52% |
| Linus Torvalds | 1 | 0.02% | 1 | 1.52% |
| Thomas Gleixner | 1 | 0.02% | 1 | 1.52% |
| Total | 4171 | 66 |
/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * dlmcommon.h * * Copyright (C) 2004 Oracle. All rights reserved. */ #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_LOCK_RES_OWNER_UNKNOWN O2NM_MAX_NODES #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(NULL, _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 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; u8 migrate_done; /* set to 1 means node has migrated all lock resources */ 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 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 #define DLM_LOCK_RES_RECOVERY_WAITING 0x00004000 /* 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 int inflight_assert_workers; 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; }; 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, DLM_DEREF_LOCKRES_DONE = 522, }; 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 * O2NET_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[]; // 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 (O2NET_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[]; }; #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[]; }; #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[]; }; #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 { __be32 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; }; 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; __be16 ni_ipv4_port; __be32 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]; }; enum { DLM_DEREF_RESPONSE_DONE = 0, DLM_DEREF_RESPONSE_INPROG = 1, }; struct dlm_deref_lockres_done { 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| DLM_LOCK_RES_RECOVERY_WAITING)) 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_lockres_grab_inflight_worker(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); void dlm_queue_ast(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); 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); 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_deref_lockres_done_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); void __dlm_do_purge_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); 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); /* 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_RECOVERY_WAITING| 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 dlm_lock *tmplock; list_for_each_entry(tmplock, head, 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) { bitmap_copy(iter->node_map, map, O2NM_MAX_NODES); 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 */
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