1 /****************************************************************************** 2 ******************************************************************************* 3 ** 4 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 5 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 6 ** 7 ** This copyrighted material is made available to anyone wishing to use, 8 ** modify, copy, or redistribute it subject to the terms and conditions 9 ** of the GNU General Public License v.2. 10 ** 11 ******************************************************************************* 12 ******************************************************************************/ 13 14 #ifndef __DLM_INTERNAL_DOT_H__ 15 #define __DLM_INTERNAL_DOT_H__ 16 17 /* 18 * This is the main header file to be included in each DLM source file. 19 */ 20 21 #include <linux/module.h> 22 #include <linux/slab.h> 23 #include <linux/sched.h> 24 #include <linux/types.h> 25 #include <linux/ctype.h> 26 #include <linux/spinlock.h> 27 #include <linux/vmalloc.h> 28 #include <linux/list.h> 29 #include <linux/errno.h> 30 #include <linux/random.h> 31 #include <linux/delay.h> 32 #include <linux/socket.h> 33 #include <linux/kthread.h> 34 #include <linux/kobject.h> 35 #include <linux/kref.h> 36 #include <linux/kernel.h> 37 #include <linux/jhash.h> 38 #include <linux/miscdevice.h> 39 #include <linux/mutex.h> 40 #include <linux/idr.h> 41 #include <linux/ratelimit.h> 42 #include <asm/uaccess.h> 43 44 #include <linux/dlm.h> 45 #include "config.h" 46 47 /* Size of the temp buffer midcomms allocates on the stack. 48 We try to make this large enough so most messages fit. 49 FIXME: should sctp make this unnecessary? */ 50 51 #define DLM_INBUF_LEN 148 52 53 struct dlm_ls; 54 struct dlm_lkb; 55 struct dlm_rsb; 56 struct dlm_member; 57 struct dlm_rsbtable; 58 struct dlm_dirtable; 59 struct dlm_direntry; 60 struct dlm_recover; 61 struct dlm_header; 62 struct dlm_message; 63 struct dlm_rcom; 64 struct dlm_mhandle; 65 66 #define log_print(fmt, args...) \ 67 printk(KERN_ERR "dlm: "fmt"\n" , ##args) 68 #define log_error(ls, fmt, args...) \ 69 printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) 70 71 #define log_debug(ls, fmt, args...) \ 72 do { \ 73 if (dlm_config.ci_log_debug) \ 74 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ 75 (ls)->ls_name , ##args); \ 76 } while (0) 77 78 #define log_limit(ls, fmt, args...) \ 79 do { \ 80 if (dlm_config.ci_log_debug) \ 81 printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \ 82 (ls)->ls_name , ##args); \ 83 } while (0) 84 85 #define DLM_ASSERT(x, do) \ 86 { \ 87 if (!(x)) \ 88 { \ 89 printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ 90 "DLM: assertion: \"%s\"\n" \ 91 "DLM: time = %lu\n", \ 92 __LINE__, __FILE__, #x, jiffies); \ 93 {do} \ 94 printk("\n"); \ 95 BUG(); \ 96 panic("DLM: Record message above and reboot.\n"); \ 97 } \ 98 } 99 100 101 struct dlm_direntry { 102 struct list_head list; 103 uint32_t master_nodeid; 104 uint16_t length; 105 char name[1]; 106 }; 107 108 struct dlm_dirtable { 109 struct list_head list; 110 spinlock_t lock; 111 }; 112 113 struct dlm_rsbtable { 114 struct rb_root keep; 115 struct rb_root toss; 116 spinlock_t lock; 117 }; 118 119 120 /* 121 * Lockspace member (per node in a ls) 122 */ 123 124 struct dlm_member { 125 struct list_head list; 126 int nodeid; 127 int weight; 128 int slot; 129 int slot_prev; 130 int comm_seq; 131 uint32_t generation; 132 }; 133 134 /* 135 * Save and manage recovery state for a lockspace. 136 */ 137 138 struct dlm_recover { 139 struct list_head list; 140 struct dlm_config_node *nodes; 141 int nodes_count; 142 uint64_t seq; 143 }; 144 145 /* 146 * Pass input args to second stage locking function. 147 */ 148 149 struct dlm_args { 150 uint32_t flags; 151 void (*astfn) (void *astparam); 152 void *astparam; 153 void (*bastfn) (void *astparam, int mode); 154 int mode; 155 struct dlm_lksb *lksb; 156 unsigned long timeout; 157 }; 158 159 160 /* 161 * Lock block 162 * 163 * A lock can be one of three types: 164 * 165 * local copy lock is mastered locally 166 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) 167 * process copy lock is mastered on a remote node 168 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) 169 * master copy master node's copy of a lock owned by remote node 170 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) 171 * 172 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or 173 * dlm_unlock. The dlm does not modify these or use any private flags in 174 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags 175 * are sent as-is to the remote master when the lock is remote. 176 * 177 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. 178 * Some internal flags are shared between the master and process nodes; 179 * these shared flags are kept in the lower two bytes. One of these 180 * flags set on the master copy will be propagated to the process copy 181 * and v.v. Other internal flags are private to the master or process 182 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. 183 * 184 * lkb_sbflags: status block flags. These flags are copied directly into 185 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion 186 * ast. All defined in dlm.h with DLM_SBF_ prefix. 187 * 188 * lkb_status: the lock status indicates which rsb queue the lock is 189 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT 190 * 191 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a 192 * reply is needed. Only set when the lkb is on the lockspace waiters 193 * list awaiting a reply from a remote node. 194 * 195 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb 196 * is a master copy, nodeid specifies the remote lock holder, when the 197 * lkb is a process copy, the nodeid specifies the lock master. 198 */ 199 200 /* lkb_status */ 201 202 #define DLM_LKSTS_WAITING 1 203 #define DLM_LKSTS_GRANTED 2 204 #define DLM_LKSTS_CONVERT 3 205 206 /* lkb_flags */ 207 208 #define DLM_IFL_MSTCPY 0x00010000 209 #define DLM_IFL_RESEND 0x00020000 210 #define DLM_IFL_DEAD 0x00040000 211 #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 212 #define DLM_IFL_OVERLAP_CANCEL 0x00100000 213 #define DLM_IFL_ENDOFLIFE 0x00200000 214 #define DLM_IFL_WATCH_TIMEWARN 0x00400000 215 #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 216 #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 217 #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ 218 #define DLM_IFL_USER 0x00000001 219 #define DLM_IFL_ORPHAN 0x00000002 220 221 #define DLM_CALLBACKS_SIZE 6 222 223 #define DLM_CB_CAST 0x00000001 224 #define DLM_CB_BAST 0x00000002 225 #define DLM_CB_SKIP 0x00000004 226 227 struct dlm_callback { 228 uint64_t seq; 229 uint32_t flags; /* DLM_CBF_ */ 230 int sb_status; /* copy to lksb status */ 231 uint8_t sb_flags; /* copy to lksb flags */ 232 int8_t mode; /* rq mode of bast, gr mode of cast */ 233 }; 234 235 struct dlm_lkb { 236 struct dlm_rsb *lkb_resource; /* the rsb */ 237 struct kref lkb_ref; 238 int lkb_nodeid; /* copied from rsb */ 239 int lkb_ownpid; /* pid of lock owner */ 240 uint32_t lkb_id; /* our lock ID */ 241 uint32_t lkb_remid; /* lock ID on remote partner */ 242 uint32_t lkb_exflags; /* external flags from caller */ 243 uint32_t lkb_sbflags; /* lksb flags */ 244 uint32_t lkb_flags; /* internal flags */ 245 uint32_t lkb_lvbseq; /* lvb sequence number */ 246 247 int8_t lkb_status; /* granted, waiting, convert */ 248 int8_t lkb_rqmode; /* requested lock mode */ 249 int8_t lkb_grmode; /* granted lock mode */ 250 int8_t lkb_highbast; /* highest mode bast sent for */ 251 252 int8_t lkb_wait_type; /* type of reply waiting for */ 253 int8_t lkb_wait_count; 254 int lkb_wait_nodeid; /* for debugging */ 255 256 struct list_head lkb_statequeue; /* rsb g/c/w list */ 257 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ 258 struct list_head lkb_wait_reply; /* waiting for remote reply */ 259 struct list_head lkb_ownqueue; /* list of locks for a process */ 260 struct list_head lkb_time_list; 261 ktime_t lkb_timestamp; 262 ktime_t lkb_wait_time; 263 unsigned long lkb_timeout_cs; 264 265 struct mutex lkb_cb_mutex; 266 struct work_struct lkb_cb_work; 267 struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ 268 struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; 269 struct dlm_callback lkb_last_cast; 270 struct dlm_callback lkb_last_bast; 271 ktime_t lkb_last_cast_time; /* for debugging */ 272 ktime_t lkb_last_bast_time; /* for debugging */ 273 274 uint64_t lkb_recover_seq; /* from ls_recover_seq */ 275 276 char *lkb_lvbptr; 277 struct dlm_lksb *lkb_lksb; /* caller's status block */ 278 void (*lkb_astfn) (void *astparam); 279 void (*lkb_bastfn) (void *astparam, int mode); 280 union { 281 void *lkb_astparam; /* caller's ast arg */ 282 struct dlm_user_args *lkb_ua; 283 }; 284 }; 285 286 287 struct dlm_rsb { 288 struct dlm_ls *res_ls; /* the lockspace */ 289 struct kref res_ref; 290 struct mutex res_mutex; 291 unsigned long res_flags; 292 int res_length; /* length of rsb name */ 293 int res_nodeid; 294 uint32_t res_lvbseq; 295 uint32_t res_hash; 296 uint32_t res_bucket; /* rsbtbl */ 297 unsigned long res_toss_time; 298 uint32_t res_first_lkid; 299 struct list_head res_lookup; /* lkbs waiting on first */ 300 union { 301 struct list_head res_hashchain; 302 struct rb_node res_hashnode; /* rsbtbl */ 303 }; 304 struct list_head res_grantqueue; 305 struct list_head res_convertqueue; 306 struct list_head res_waitqueue; 307 308 struct list_head res_root_list; /* used for recovery */ 309 struct list_head res_recover_list; /* used for recovery */ 310 int res_recover_locks_count; 311 312 char *res_lvbptr; 313 char res_name[DLM_RESNAME_MAXLEN+1]; 314 }; 315 316 /* find_rsb() flags */ 317 318 #define R_MASTER 1 /* only return rsb if it's a master */ 319 #define R_CREATE 2 /* create/add rsb if not found */ 320 321 /* rsb_flags */ 322 323 enum rsb_flags { 324 RSB_MASTER_UNCERTAIN, 325 RSB_VALNOTVALID, 326 RSB_VALNOTVALID_PREV, 327 RSB_NEW_MASTER, 328 RSB_NEW_MASTER2, 329 RSB_RECOVER_CONVERT, 330 RSB_RECOVER_GRANT, 331 }; 332 333 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) 334 { 335 __set_bit(flag, &r->res_flags); 336 } 337 338 static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) 339 { 340 __clear_bit(flag, &r->res_flags); 341 } 342 343 static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) 344 { 345 return test_bit(flag, &r->res_flags); 346 } 347 348 349 /* dlm_header is first element of all structs sent between nodes */ 350 351 #define DLM_HEADER_MAJOR 0x00030000 352 #define DLM_HEADER_MINOR 0x00000001 353 354 #define DLM_HEADER_SLOTS 0x00000001 355 356 #define DLM_MSG 1 357 #define DLM_RCOM 2 358 359 struct dlm_header { 360 uint32_t h_version; 361 uint32_t h_lockspace; 362 uint32_t h_nodeid; /* nodeid of sender */ 363 uint16_t h_length; 364 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ 365 uint8_t h_pad; 366 }; 367 368 369 #define DLM_MSG_REQUEST 1 370 #define DLM_MSG_CONVERT 2 371 #define DLM_MSG_UNLOCK 3 372 #define DLM_MSG_CANCEL 4 373 #define DLM_MSG_REQUEST_REPLY 5 374 #define DLM_MSG_CONVERT_REPLY 6 375 #define DLM_MSG_UNLOCK_REPLY 7 376 #define DLM_MSG_CANCEL_REPLY 8 377 #define DLM_MSG_GRANT 9 378 #define DLM_MSG_BAST 10 379 #define DLM_MSG_LOOKUP 11 380 #define DLM_MSG_REMOVE 12 381 #define DLM_MSG_LOOKUP_REPLY 13 382 #define DLM_MSG_PURGE 14 383 384 struct dlm_message { 385 struct dlm_header m_header; 386 uint32_t m_type; /* DLM_MSG_ */ 387 uint32_t m_nodeid; 388 uint32_t m_pid; 389 uint32_t m_lkid; /* lkid on sender */ 390 uint32_t m_remid; /* lkid on receiver */ 391 uint32_t m_parent_lkid; 392 uint32_t m_parent_remid; 393 uint32_t m_exflags; 394 uint32_t m_sbflags; 395 uint32_t m_flags; 396 uint32_t m_lvbseq; 397 uint32_t m_hash; 398 int m_status; 399 int m_grmode; 400 int m_rqmode; 401 int m_bastmode; 402 int m_asts; 403 int m_result; /* 0 or -EXXX */ 404 char m_extra[0]; /* name or lvb */ 405 }; 406 407 408 #define DLM_RS_NODES 0x00000001 409 #define DLM_RS_NODES_ALL 0x00000002 410 #define DLM_RS_DIR 0x00000004 411 #define DLM_RS_DIR_ALL 0x00000008 412 #define DLM_RS_LOCKS 0x00000010 413 #define DLM_RS_LOCKS_ALL 0x00000020 414 #define DLM_RS_DONE 0x00000040 415 #define DLM_RS_DONE_ALL 0x00000080 416 417 #define DLM_RCOM_STATUS 1 418 #define DLM_RCOM_NAMES 2 419 #define DLM_RCOM_LOOKUP 3 420 #define DLM_RCOM_LOCK 4 421 #define DLM_RCOM_STATUS_REPLY 5 422 #define DLM_RCOM_NAMES_REPLY 6 423 #define DLM_RCOM_LOOKUP_REPLY 7 424 #define DLM_RCOM_LOCK_REPLY 8 425 426 struct dlm_rcom { 427 struct dlm_header rc_header; 428 uint32_t rc_type; /* DLM_RCOM_ */ 429 int rc_result; /* multi-purpose */ 430 uint64_t rc_id; /* match reply with request */ 431 uint64_t rc_seq; /* sender's ls_recover_seq */ 432 uint64_t rc_seq_reply; /* remote ls_recover_seq */ 433 char rc_buf[0]; 434 }; 435 436 union dlm_packet { 437 struct dlm_header header; /* common to other two */ 438 struct dlm_message message; 439 struct dlm_rcom rcom; 440 }; 441 442 #define DLM_RSF_NEED_SLOTS 0x00000001 443 444 /* RCOM_STATUS data */ 445 struct rcom_status { 446 __le32 rs_flags; 447 __le32 rs_unused1; 448 __le64 rs_unused2; 449 }; 450 451 /* RCOM_STATUS_REPLY data */ 452 struct rcom_config { 453 __le32 rf_lvblen; 454 __le32 rf_lsflags; 455 456 /* DLM_HEADER_SLOTS adds: */ 457 __le32 rf_flags; 458 __le16 rf_our_slot; 459 __le16 rf_num_slots; 460 __le32 rf_generation; 461 __le32 rf_unused1; 462 __le64 rf_unused2; 463 }; 464 465 struct rcom_slot { 466 __le32 ro_nodeid; 467 __le16 ro_slot; 468 __le16 ro_unused1; 469 __le64 ro_unused2; 470 }; 471 472 struct rcom_lock { 473 __le32 rl_ownpid; 474 __le32 rl_lkid; 475 __le32 rl_remid; 476 __le32 rl_parent_lkid; 477 __le32 rl_parent_remid; 478 __le32 rl_exflags; 479 __le32 rl_flags; 480 __le32 rl_lvbseq; 481 __le32 rl_result; 482 int8_t rl_rqmode; 483 int8_t rl_grmode; 484 int8_t rl_status; 485 int8_t rl_asts; 486 __le16 rl_wait_type; 487 __le16 rl_namelen; 488 char rl_name[DLM_RESNAME_MAXLEN]; 489 char rl_lvb[0]; 490 }; 491 492 struct dlm_ls { 493 struct list_head ls_list; /* list of lockspaces */ 494 dlm_lockspace_t *ls_local_handle; 495 uint32_t ls_global_id; /* global unique lockspace ID */ 496 uint32_t ls_generation; 497 uint32_t ls_exflags; 498 int ls_lvblen; 499 int ls_count; /* refcount of processes in 500 the dlm using this ls */ 501 int ls_create_count; /* create/release refcount */ 502 unsigned long ls_flags; /* LSFL_ */ 503 unsigned long ls_scan_time; 504 struct kobject ls_kobj; 505 506 struct idr ls_lkbidr; 507 spinlock_t ls_lkbidr_spin; 508 509 struct dlm_rsbtable *ls_rsbtbl; 510 uint32_t ls_rsbtbl_size; 511 512 struct dlm_dirtable *ls_dirtbl; 513 uint32_t ls_dirtbl_size; 514 515 struct mutex ls_waiters_mutex; 516 struct list_head ls_waiters; /* lkbs needing a reply */ 517 518 struct mutex ls_orphans_mutex; 519 struct list_head ls_orphans; 520 521 struct mutex ls_timeout_mutex; 522 struct list_head ls_timeout; 523 524 spinlock_t ls_new_rsb_spin; 525 int ls_new_rsb_count; 526 struct list_head ls_new_rsb; /* new rsb structs */ 527 528 struct list_head ls_nodes; /* current nodes in ls */ 529 struct list_head ls_nodes_gone; /* dead node list, recovery */ 530 int ls_num_nodes; /* number of nodes in ls */ 531 int ls_low_nodeid; 532 int ls_total_weight; 533 int *ls_node_array; 534 535 int ls_slot; 536 int ls_num_slots; 537 int ls_slots_size; 538 struct dlm_slot *ls_slots; 539 540 struct dlm_rsb ls_stub_rsb; /* for returning errors */ 541 struct dlm_lkb ls_stub_lkb; /* for returning errors */ 542 struct dlm_message ls_stub_ms; /* for faking a reply */ 543 544 struct dentry *ls_debug_rsb_dentry; /* debugfs */ 545 struct dentry *ls_debug_waiters_dentry; /* debugfs */ 546 struct dentry *ls_debug_locks_dentry; /* debugfs */ 547 struct dentry *ls_debug_all_dentry; /* debugfs */ 548 549 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ 550 int ls_uevent_result; 551 struct completion ls_members_done; 552 int ls_members_result; 553 554 struct miscdevice ls_device; 555 556 struct workqueue_struct *ls_callback_wq; 557 558 /* recovery related */ 559 560 struct mutex ls_cb_mutex; 561 struct list_head ls_cb_delay; /* save for queue_work later */ 562 struct timer_list ls_timer; 563 struct task_struct *ls_recoverd_task; 564 struct mutex ls_recoverd_active; 565 spinlock_t ls_recover_lock; 566 unsigned long ls_recover_begin; /* jiffies timestamp */ 567 uint32_t ls_recover_status; /* DLM_RS_ */ 568 uint64_t ls_recover_seq; 569 struct dlm_recover *ls_recover_args; 570 struct rw_semaphore ls_in_recovery; /* block local requests */ 571 struct rw_semaphore ls_recv_active; /* block dlm_recv */ 572 struct list_head ls_requestqueue;/* queue remote requests */ 573 struct mutex ls_requestqueue_mutex; 574 struct dlm_rcom *ls_recover_buf; 575 int ls_recover_nodeid; /* for debugging */ 576 unsigned int ls_recover_locks_in; /* for log info */ 577 uint64_t ls_rcom_seq; 578 spinlock_t ls_rcom_spin; 579 struct list_head ls_recover_list; 580 spinlock_t ls_recover_list_lock; 581 int ls_recover_list_count; 582 wait_queue_head_t ls_wait_general; 583 struct mutex ls_clear_proc_locks; 584 585 struct list_head ls_root_list; /* root resources */ 586 struct rw_semaphore ls_root_sem; /* protect root_list */ 587 588 const struct dlm_lockspace_ops *ls_ops; 589 void *ls_ops_arg; 590 591 int ls_namelen; 592 char ls_name[1]; 593 }; 594 595 #define LSFL_WORK 0 596 #define LSFL_RUNNING 1 597 #define LSFL_RECOVERY_STOP 2 598 #define LSFL_RCOM_READY 3 599 #define LSFL_RCOM_WAIT 4 600 #define LSFL_UEVENT_WAIT 5 601 #define LSFL_TIMEWARN 6 602 #define LSFL_CB_DELAY 7 603 #define LSFL_NODIR 8 604 605 /* much of this is just saving user space pointers associated with the 606 lock that we pass back to the user lib with an ast */ 607 608 struct dlm_user_args { 609 struct dlm_user_proc *proc; /* each process that opens the lockspace 610 device has private data 611 (dlm_user_proc) on the struct file, 612 the process's locks point back to it*/ 613 struct dlm_lksb lksb; 614 struct dlm_lksb __user *user_lksb; 615 void __user *castparam; 616 void __user *castaddr; 617 void __user *bastparam; 618 void __user *bastaddr; 619 uint64_t xid; 620 }; 621 622 #define DLM_PROC_FLAGS_CLOSING 1 623 #define DLM_PROC_FLAGS_COMPAT 2 624 625 /* locks list is kept so we can remove all a process's locks when it 626 exits (or orphan those that are persistent) */ 627 628 struct dlm_user_proc { 629 dlm_lockspace_t *lockspace; 630 unsigned long flags; /* DLM_PROC_FLAGS */ 631 struct list_head asts; 632 spinlock_t asts_spin; 633 struct list_head locks; 634 spinlock_t locks_spin; 635 struct list_head unlocking; 636 wait_queue_head_t wait; 637 }; 638 639 static inline int dlm_locking_stopped(struct dlm_ls *ls) 640 { 641 return !test_bit(LSFL_RUNNING, &ls->ls_flags); 642 } 643 644 static inline int dlm_recovery_stopped(struct dlm_ls *ls) 645 { 646 return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags); 647 } 648 649 static inline int dlm_no_directory(struct dlm_ls *ls) 650 { 651 return test_bit(LSFL_NODIR, &ls->ls_flags); 652 } 653 654 int dlm_netlink_init(void); 655 void dlm_netlink_exit(void); 656 void dlm_timeout_warn(struct dlm_lkb *lkb); 657 int dlm_plock_init(void); 658 void dlm_plock_exit(void); 659 660 #ifdef CONFIG_DLM_DEBUG 661 int dlm_register_debugfs(void); 662 void dlm_unregister_debugfs(void); 663 int dlm_create_debug_file(struct dlm_ls *ls); 664 void dlm_delete_debug_file(struct dlm_ls *ls); 665 #else 666 static inline int dlm_register_debugfs(void) { return 0; } 667 static inline void dlm_unregister_debugfs(void) { } 668 static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; } 669 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } 670 #endif 671 672 #endif /* __DLM_INTERNAL_DOT_H__ */ 673 674