1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /****************************************************************************** 3 ******************************************************************************* 4 ** 5 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 6 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 7 ** 8 ** 9 ******************************************************************************* 10 ******************************************************************************/ 11 12 #ifndef __DLM_INTERNAL_DOT_H__ 13 #define __DLM_INTERNAL_DOT_H__ 14 15 /* 16 * This is the main header file to be included in each DLM source file. 17 */ 18 19 #include <linux/slab.h> 20 #include <linux/sched.h> 21 #include <linux/types.h> 22 #include <linux/ctype.h> 23 #include <linux/spinlock.h> 24 #include <linux/vmalloc.h> 25 #include <linux/list.h> 26 #include <linux/errno.h> 27 #include <linux/random.h> 28 #include <linux/delay.h> 29 #include <linux/socket.h> 30 #include <linux/kthread.h> 31 #include <linux/kobject.h> 32 #include <linux/kref.h> 33 #include <linux/kernel.h> 34 #include <linux/jhash.h> 35 #include <linux/miscdevice.h> 36 #include <linux/mutex.h> 37 #include <linux/idr.h> 38 #include <linux/ratelimit.h> 39 #include <linux/uaccess.h> 40 41 #include <linux/dlm.h> 42 #include "config.h" 43 44 struct dlm_ls; 45 struct dlm_lkb; 46 struct dlm_rsb; 47 struct dlm_member; 48 struct dlm_rsbtable; 49 struct dlm_recover; 50 struct dlm_header; 51 struct dlm_message; 52 struct dlm_rcom; 53 struct dlm_mhandle; 54 struct dlm_msg; 55 56 #define log_print(fmt, args...) \ 57 printk(KERN_ERR "dlm: "fmt"\n" , ##args) 58 #define log_print_ratelimited(fmt, args...) \ 59 printk_ratelimited(KERN_ERR "dlm: "fmt"\n", ##args) 60 #define log_error(ls, fmt, args...) \ 61 printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) 62 63 #define log_rinfo(ls, fmt, args...) \ 64 do { \ 65 if (dlm_config.ci_log_info) \ 66 printk(KERN_INFO "dlm: %s: " fmt "\n", \ 67 (ls)->ls_name, ##args); \ 68 else if (dlm_config.ci_log_debug) \ 69 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ 70 (ls)->ls_name , ##args); \ 71 } while (0) 72 73 #define log_debug(ls, fmt, args...) \ 74 do { \ 75 if (dlm_config.ci_log_debug) \ 76 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ 77 (ls)->ls_name , ##args); \ 78 } while (0) 79 80 #define log_limit(ls, fmt, args...) \ 81 do { \ 82 if (dlm_config.ci_log_debug) \ 83 printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \ 84 (ls)->ls_name , ##args); \ 85 } while (0) 86 87 #define DLM_ASSERT(x, do) \ 88 { \ 89 if (!(x)) \ 90 { \ 91 printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ 92 "DLM: assertion: \"%s\"\n" \ 93 "DLM: time = %lu\n", \ 94 __LINE__, __FILE__, #x, jiffies); \ 95 {do} \ 96 printk("\n"); \ 97 panic("DLM: Record message above and reboot.\n"); \ 98 } \ 99 } 100 101 102 #define DLM_RTF_SHRINK 0x00000001 103 104 struct dlm_rsbtable { 105 struct rb_root keep; 106 struct rb_root toss; 107 spinlock_t lock; 108 uint32_t flags; 109 }; 110 111 112 /* 113 * Lockspace member (per node in a ls) 114 */ 115 116 struct dlm_member { 117 struct list_head list; 118 int nodeid; 119 int weight; 120 int slot; 121 int slot_prev; 122 int comm_seq; 123 uint32_t generation; 124 }; 125 126 /* 127 * Save and manage recovery state for a lockspace. 128 */ 129 130 struct dlm_recover { 131 struct list_head list; 132 struct dlm_config_node *nodes; 133 int nodes_count; 134 uint64_t seq; 135 }; 136 137 /* 138 * Pass input args to second stage locking function. 139 */ 140 141 struct dlm_args { 142 uint32_t flags; 143 void (*astfn) (void *astparam); 144 void *astparam; 145 void (*bastfn) (void *astparam, int mode); 146 int mode; 147 struct dlm_lksb *lksb; 148 #ifdef CONFIG_DLM_DEPRECATED_API 149 unsigned long timeout; 150 #endif 151 }; 152 153 154 /* 155 * Lock block 156 * 157 * A lock can be one of three types: 158 * 159 * local copy lock is mastered locally 160 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) 161 * process copy lock is mastered on a remote node 162 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) 163 * master copy master node's copy of a lock owned by remote node 164 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) 165 * 166 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or 167 * dlm_unlock. The dlm does not modify these or use any private flags in 168 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags 169 * are sent as-is to the remote master when the lock is remote. 170 * 171 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. 172 * Some internal flags are shared between the master and process nodes; 173 * these shared flags are kept in the lower two bytes. One of these 174 * flags set on the master copy will be propagated to the process copy 175 * and v.v. Other internal flags are private to the master or process 176 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. 177 * 178 * lkb_sbflags: status block flags. These flags are copied directly into 179 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion 180 * ast. All defined in dlm.h with DLM_SBF_ prefix. 181 * 182 * lkb_status: the lock status indicates which rsb queue the lock is 183 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT 184 * 185 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a 186 * reply is needed. Only set when the lkb is on the lockspace waiters 187 * list awaiting a reply from a remote node. 188 * 189 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb 190 * is a master copy, nodeid specifies the remote lock holder, when the 191 * lkb is a process copy, the nodeid specifies the lock master. 192 */ 193 194 /* lkb_status */ 195 196 #define DLM_LKSTS_WAITING 1 197 #define DLM_LKSTS_GRANTED 2 198 #define DLM_LKSTS_CONVERT 3 199 200 /* lkb_flags */ 201 202 #define DLM_IFL_MSTCPY 0x00010000 203 #define DLM_IFL_RESEND 0x00020000 204 #define DLM_IFL_DEAD 0x00040000 205 #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 206 #define DLM_IFL_OVERLAP_CANCEL 0x00100000 207 #define DLM_IFL_ENDOFLIFE 0x00200000 208 #ifdef CONFIG_DLM_DEPRECATED_API 209 #define DLM_IFL_WATCH_TIMEWARN 0x00400000 210 #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 211 #endif 212 #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 213 #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ 214 /* least significant 2 bytes are message changed, they are full transmitted 215 * but at receive side only the 2 bytes LSB will be set. 216 * 217 * Even wireshark dlm dissector does only evaluate the lower bytes and note 218 * that they may not be used on transceiver side, we assume the higher bytes 219 * are for internal use or reserved so long they are not parsed on receiver 220 * side. 221 */ 222 #define DLM_IFL_USER 0x00000001 223 #define DLM_IFL_ORPHAN 0x00000002 224 225 #define DLM_CALLBACKS_SIZE 6 226 227 #define DLM_CB_CAST 0x00000001 228 #define DLM_CB_BAST 0x00000002 229 #define DLM_CB_SKIP 0x00000004 230 231 struct dlm_callback { 232 uint64_t seq; 233 uint32_t flags; /* DLM_CBF_ */ 234 int sb_status; /* copy to lksb status */ 235 uint8_t sb_flags; /* copy to lksb flags */ 236 int8_t mode; /* rq mode of bast, gr mode of cast */ 237 }; 238 239 struct dlm_lkb { 240 struct dlm_rsb *lkb_resource; /* the rsb */ 241 struct kref lkb_ref; 242 int lkb_nodeid; /* copied from rsb */ 243 int lkb_ownpid; /* pid of lock owner */ 244 uint32_t lkb_id; /* our lock ID */ 245 uint32_t lkb_remid; /* lock ID on remote partner */ 246 uint32_t lkb_exflags; /* external flags from caller */ 247 uint32_t lkb_sbflags; /* lksb flags */ 248 uint32_t lkb_flags; /* internal flags */ 249 uint32_t lkb_lvbseq; /* lvb sequence number */ 250 251 int8_t lkb_status; /* granted, waiting, convert */ 252 int8_t lkb_rqmode; /* requested lock mode */ 253 int8_t lkb_grmode; /* granted lock mode */ 254 int8_t lkb_highbast; /* highest mode bast sent for */ 255 256 int8_t lkb_wait_type; /* type of reply waiting for */ 257 int8_t lkb_wait_count; 258 int lkb_wait_nodeid; /* for debugging */ 259 260 struct list_head lkb_statequeue; /* rsb g/c/w list */ 261 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ 262 struct list_head lkb_wait_reply; /* waiting for remote reply */ 263 struct list_head lkb_ownqueue; /* list of locks for a process */ 264 ktime_t lkb_timestamp; 265 266 #ifdef CONFIG_DLM_DEPRECATED_API 267 struct list_head lkb_time_list; 268 unsigned long lkb_timeout_cs; 269 #endif 270 271 struct mutex lkb_cb_mutex; 272 struct work_struct lkb_cb_work; 273 struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ 274 struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; 275 struct dlm_callback lkb_last_cast; 276 struct dlm_callback lkb_last_bast; 277 ktime_t lkb_last_cast_time; /* for debugging */ 278 ktime_t lkb_last_bast_time; /* for debugging */ 279 280 uint64_t lkb_recover_seq; /* from ls_recover_seq */ 281 282 char *lkb_lvbptr; 283 struct dlm_lksb *lkb_lksb; /* caller's status block */ 284 void (*lkb_astfn) (void *astparam); 285 void (*lkb_bastfn) (void *astparam, int mode); 286 union { 287 void *lkb_astparam; /* caller's ast arg */ 288 struct dlm_user_args *lkb_ua; 289 }; 290 }; 291 292 /* 293 * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real 294 * nodeid, even when nodeid is our_nodeid. 295 * 296 * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid, 297 * greater than zero when another nodeid. 298 * 299 * (TODO: remove res_nodeid and only use res_master_nodeid) 300 */ 301 302 struct dlm_rsb { 303 struct dlm_ls *res_ls; /* the lockspace */ 304 struct kref res_ref; 305 struct mutex res_mutex; 306 unsigned long res_flags; 307 int res_length; /* length of rsb name */ 308 int res_nodeid; 309 int res_master_nodeid; 310 int res_dir_nodeid; 311 int res_id; /* for ls_recover_idr */ 312 uint32_t res_lvbseq; 313 uint32_t res_hash; 314 uint32_t res_bucket; /* rsbtbl */ 315 unsigned long res_toss_time; 316 uint32_t res_first_lkid; 317 struct list_head res_lookup; /* lkbs waiting on first */ 318 union { 319 struct list_head res_hashchain; 320 struct rb_node res_hashnode; /* rsbtbl */ 321 }; 322 struct list_head res_grantqueue; 323 struct list_head res_convertqueue; 324 struct list_head res_waitqueue; 325 326 struct list_head res_root_list; /* used for recovery */ 327 struct list_head res_recover_list; /* used for recovery */ 328 int res_recover_locks_count; 329 330 char *res_lvbptr; 331 char res_name[DLM_RESNAME_MAXLEN+1]; 332 }; 333 334 /* dlm_master_lookup() flags */ 335 336 #define DLM_LU_RECOVER_DIR 1 337 #define DLM_LU_RECOVER_MASTER 2 338 339 /* dlm_master_lookup() results */ 340 341 #define DLM_LU_MATCH 1 342 #define DLM_LU_ADD 2 343 344 /* find_rsb() flags */ 345 346 #define R_REQUEST 0x00000001 347 #define R_RECEIVE_REQUEST 0x00000002 348 #define R_RECEIVE_RECOVER 0x00000004 349 350 /* rsb_flags */ 351 352 enum rsb_flags { 353 RSB_MASTER_UNCERTAIN, 354 RSB_VALNOTVALID, 355 RSB_VALNOTVALID_PREV, 356 RSB_NEW_MASTER, 357 RSB_NEW_MASTER2, 358 RSB_RECOVER_CONVERT, 359 RSB_RECOVER_GRANT, 360 RSB_RECOVER_LVB_INVAL, 361 }; 362 363 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) 364 { 365 __set_bit(flag, &r->res_flags); 366 } 367 368 static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) 369 { 370 __clear_bit(flag, &r->res_flags); 371 } 372 373 static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) 374 { 375 return test_bit(flag, &r->res_flags); 376 } 377 378 379 /* dlm_header is first element of all structs sent between nodes */ 380 381 #define DLM_HEADER_MAJOR 0x00030000 382 #define DLM_HEADER_MINOR 0x00000002 383 384 #define DLM_VERSION_3_1 0x00030001 385 #define DLM_VERSION_3_2 0x00030002 386 387 #define DLM_HEADER_SLOTS 0x00000001 388 389 #define DLM_MSG 1 390 #define DLM_RCOM 2 391 #define DLM_OPTS 3 392 #define DLM_ACK 4 393 #define DLM_FIN 5 394 395 struct dlm_header { 396 __le32 h_version; 397 union { 398 /* for DLM_MSG and DLM_RCOM */ 399 __le32 h_lockspace; 400 /* for DLM_ACK and DLM_OPTS */ 401 __le32 h_seq; 402 } u; 403 __le32 h_nodeid; /* nodeid of sender */ 404 __le16 h_length; 405 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ 406 uint8_t h_pad; 407 }; 408 409 #define DLM_MSG_REQUEST 1 410 #define DLM_MSG_CONVERT 2 411 #define DLM_MSG_UNLOCK 3 412 #define DLM_MSG_CANCEL 4 413 #define DLM_MSG_REQUEST_REPLY 5 414 #define DLM_MSG_CONVERT_REPLY 6 415 #define DLM_MSG_UNLOCK_REPLY 7 416 #define DLM_MSG_CANCEL_REPLY 8 417 #define DLM_MSG_GRANT 9 418 #define DLM_MSG_BAST 10 419 #define DLM_MSG_LOOKUP 11 420 #define DLM_MSG_REMOVE 12 421 #define DLM_MSG_LOOKUP_REPLY 13 422 #define DLM_MSG_PURGE 14 423 424 struct dlm_message { 425 struct dlm_header m_header; 426 __le32 m_type; /* DLM_MSG_ */ 427 __le32 m_nodeid; 428 __le32 m_pid; 429 __le32 m_lkid; /* lkid on sender */ 430 __le32 m_remid; /* lkid on receiver */ 431 __le32 m_parent_lkid; 432 __le32 m_parent_remid; 433 __le32 m_exflags; 434 __le32 m_sbflags; 435 __le32 m_flags; 436 __le32 m_lvbseq; 437 __le32 m_hash; 438 __le32 m_status; 439 __le32 m_grmode; 440 __le32 m_rqmode; 441 __le32 m_bastmode; 442 __le32 m_asts; 443 __le32 m_result; /* 0 or -EXXX */ 444 char m_extra[]; /* name or lvb */ 445 }; 446 447 448 #define DLM_RS_NODES 0x00000001 449 #define DLM_RS_NODES_ALL 0x00000002 450 #define DLM_RS_DIR 0x00000004 451 #define DLM_RS_DIR_ALL 0x00000008 452 #define DLM_RS_LOCKS 0x00000010 453 #define DLM_RS_LOCKS_ALL 0x00000020 454 #define DLM_RS_DONE 0x00000040 455 #define DLM_RS_DONE_ALL 0x00000080 456 457 #define DLM_RCOM_STATUS 1 458 #define DLM_RCOM_NAMES 2 459 #define DLM_RCOM_LOOKUP 3 460 #define DLM_RCOM_LOCK 4 461 #define DLM_RCOM_STATUS_REPLY 5 462 #define DLM_RCOM_NAMES_REPLY 6 463 #define DLM_RCOM_LOOKUP_REPLY 7 464 #define DLM_RCOM_LOCK_REPLY 8 465 466 struct dlm_rcom { 467 struct dlm_header rc_header; 468 __le32 rc_type; /* DLM_RCOM_ */ 469 __le32 rc_result; /* multi-purpose */ 470 __le64 rc_id; /* match reply with request */ 471 __le64 rc_seq; /* sender's ls_recover_seq */ 472 __le64 rc_seq_reply; /* remote ls_recover_seq */ 473 char rc_buf[]; 474 }; 475 476 struct dlm_opt_header { 477 __le16 t_type; 478 __le16 t_length; 479 __le32 t_pad; 480 /* need to be 8 byte aligned */ 481 char t_value[]; 482 }; 483 484 /* encapsulation header */ 485 struct dlm_opts { 486 struct dlm_header o_header; 487 uint8_t o_nextcmd; 488 uint8_t o_pad; 489 __le16 o_optlen; 490 __le32 o_pad2; 491 char o_opts[]; 492 }; 493 494 union dlm_packet { 495 struct dlm_header header; /* common to other two */ 496 struct dlm_message message; 497 struct dlm_rcom rcom; 498 struct dlm_opts opts; 499 }; 500 501 #define DLM_RSF_NEED_SLOTS 0x00000001 502 503 /* RCOM_STATUS data */ 504 struct rcom_status { 505 __le32 rs_flags; 506 __le32 rs_unused1; 507 __le64 rs_unused2; 508 }; 509 510 /* RCOM_STATUS_REPLY data */ 511 struct rcom_config { 512 __le32 rf_lvblen; 513 __le32 rf_lsflags; 514 515 /* DLM_HEADER_SLOTS adds: */ 516 __le32 rf_flags; 517 __le16 rf_our_slot; 518 __le16 rf_num_slots; 519 __le32 rf_generation; 520 __le32 rf_unused1; 521 __le64 rf_unused2; 522 }; 523 524 struct rcom_slot { 525 __le32 ro_nodeid; 526 __le16 ro_slot; 527 __le16 ro_unused1; 528 __le64 ro_unused2; 529 }; 530 531 struct rcom_lock { 532 __le32 rl_ownpid; 533 __le32 rl_lkid; 534 __le32 rl_remid; 535 __le32 rl_parent_lkid; 536 __le32 rl_parent_remid; 537 __le32 rl_exflags; 538 __le32 rl_flags; 539 __le32 rl_lvbseq; 540 __le32 rl_result; 541 int8_t rl_rqmode; 542 int8_t rl_grmode; 543 int8_t rl_status; 544 int8_t rl_asts; 545 __le16 rl_wait_type; 546 __le16 rl_namelen; 547 char rl_name[DLM_RESNAME_MAXLEN]; 548 char rl_lvb[]; 549 }; 550 551 /* 552 * The max number of resources per rsbtbl bucket that shrink will attempt 553 * to remove in each iteration. 554 */ 555 556 #define DLM_REMOVE_NAMES_MAX 8 557 558 struct dlm_ls { 559 struct list_head ls_list; /* list of lockspaces */ 560 dlm_lockspace_t *ls_local_handle; 561 uint32_t ls_global_id; /* global unique lockspace ID */ 562 uint32_t ls_generation; 563 uint32_t ls_exflags; 564 int ls_lvblen; 565 atomic_t ls_count; /* refcount of processes in 566 the dlm using this ls */ 567 wait_queue_head_t ls_count_wait; 568 int ls_create_count; /* create/release refcount */ 569 unsigned long ls_flags; /* LSFL_ */ 570 unsigned long ls_scan_time; 571 struct kobject ls_kobj; 572 573 struct idr ls_lkbidr; 574 spinlock_t ls_lkbidr_spin; 575 576 struct dlm_rsbtable *ls_rsbtbl; 577 uint32_t ls_rsbtbl_size; 578 579 struct mutex ls_waiters_mutex; 580 struct list_head ls_waiters; /* lkbs needing a reply */ 581 582 struct mutex ls_orphans_mutex; 583 struct list_head ls_orphans; 584 585 #ifdef CONFIG_DLM_DEPRECATED_API 586 struct mutex ls_timeout_mutex; 587 struct list_head ls_timeout; 588 #endif 589 590 spinlock_t ls_new_rsb_spin; 591 int ls_new_rsb_count; 592 struct list_head ls_new_rsb; /* new rsb structs */ 593 594 spinlock_t ls_remove_spin; 595 wait_queue_head_t ls_remove_wait; 596 char ls_remove_name[DLM_RESNAME_MAXLEN+1]; 597 char *ls_remove_names[DLM_REMOVE_NAMES_MAX]; 598 int ls_remove_len; 599 int ls_remove_lens[DLM_REMOVE_NAMES_MAX]; 600 601 struct list_head ls_nodes; /* current nodes in ls */ 602 struct list_head ls_nodes_gone; /* dead node list, recovery */ 603 int ls_num_nodes; /* number of nodes in ls */ 604 int ls_low_nodeid; 605 int ls_total_weight; 606 int *ls_node_array; 607 608 int ls_slot; 609 int ls_num_slots; 610 int ls_slots_size; 611 struct dlm_slot *ls_slots; 612 613 struct dlm_rsb ls_stub_rsb; /* for returning errors */ 614 struct dlm_lkb ls_stub_lkb; /* for returning errors */ 615 struct dlm_message ls_stub_ms; /* for faking a reply */ 616 617 struct dentry *ls_debug_rsb_dentry; /* debugfs */ 618 struct dentry *ls_debug_waiters_dentry; /* debugfs */ 619 struct dentry *ls_debug_locks_dentry; /* debugfs */ 620 struct dentry *ls_debug_all_dentry; /* debugfs */ 621 struct dentry *ls_debug_toss_dentry; /* debugfs */ 622 623 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ 624 int ls_uevent_result; 625 struct completion ls_recovery_done; 626 int ls_recovery_result; 627 628 struct miscdevice ls_device; 629 630 struct workqueue_struct *ls_callback_wq; 631 632 /* recovery related */ 633 634 struct mutex ls_cb_mutex; 635 struct list_head ls_cb_delay; /* save for queue_work later */ 636 struct timer_list ls_timer; 637 struct task_struct *ls_recoverd_task; 638 struct mutex ls_recoverd_active; 639 spinlock_t ls_recover_lock; 640 unsigned long ls_recover_begin; /* jiffies timestamp */ 641 uint32_t ls_recover_status; /* DLM_RS_ */ 642 uint64_t ls_recover_seq; 643 struct dlm_recover *ls_recover_args; 644 struct rw_semaphore ls_in_recovery; /* block local requests */ 645 struct rw_semaphore ls_recv_active; /* block dlm_recv */ 646 struct list_head ls_requestqueue;/* queue remote requests */ 647 atomic_t ls_requestqueue_cnt; 648 wait_queue_head_t ls_requestqueue_wait; 649 struct mutex ls_requestqueue_mutex; 650 struct dlm_rcom *ls_recover_buf; 651 int ls_recover_nodeid; /* for debugging */ 652 unsigned int ls_recover_dir_sent_res; /* for log info */ 653 unsigned int ls_recover_dir_sent_msg; /* for log info */ 654 unsigned int ls_recover_locks_in; /* for log info */ 655 uint64_t ls_rcom_seq; 656 spinlock_t ls_rcom_spin; 657 struct list_head ls_recover_list; 658 spinlock_t ls_recover_list_lock; 659 int ls_recover_list_count; 660 struct idr ls_recover_idr; 661 spinlock_t ls_recover_idr_lock; 662 wait_queue_head_t ls_wait_general; 663 wait_queue_head_t ls_recover_lock_wait; 664 struct mutex ls_clear_proc_locks; 665 666 struct list_head ls_root_list; /* root resources */ 667 struct rw_semaphore ls_root_sem; /* protect root_list */ 668 669 const struct dlm_lockspace_ops *ls_ops; 670 void *ls_ops_arg; 671 672 int ls_namelen; 673 char ls_name[1]; 674 }; 675 676 /* 677 * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines 678 * that they should abort what they're doing so new recovery can be started. 679 * 680 * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it 681 * should do down_write() on the in_recovery rw_semaphore. (doing down_write 682 * within dlm_ls_stop causes complaints about the lock acquired/released 683 * in different contexts.) 684 * 685 * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore. 686 * It sets this after it is done with down_write() on the in_recovery 687 * rw_semaphore and clears it after it has released the rw_semaphore. 688 * 689 * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it 690 * should begin recovery of the lockspace. 691 * 692 * LSFL_RUNNING - set when normal locking activity is enabled. 693 * dlm_ls_stop() clears this to tell dlm locking routines that they should 694 * quit what they are doing so recovery can run. dlm_recoverd sets 695 * this after recovery is finished. 696 */ 697 698 #define LSFL_RECOVER_STOP 0 699 #define LSFL_RECOVER_DOWN 1 700 #define LSFL_RECOVER_LOCK 2 701 #define LSFL_RECOVER_WORK 3 702 #define LSFL_RUNNING 4 703 704 #define LSFL_RCOM_READY 5 705 #define LSFL_RCOM_WAIT 6 706 #define LSFL_UEVENT_WAIT 7 707 #ifdef CONFIG_DLM_DEPRECATED_API 708 #define LSFL_TIMEWARN 8 709 #endif 710 #define LSFL_CB_DELAY 9 711 #define LSFL_NODIR 10 712 713 /* much of this is just saving user space pointers associated with the 714 lock that we pass back to the user lib with an ast */ 715 716 struct dlm_user_args { 717 struct dlm_user_proc *proc; /* each process that opens the lockspace 718 device has private data 719 (dlm_user_proc) on the struct file, 720 the process's locks point back to it*/ 721 struct dlm_lksb lksb; 722 struct dlm_lksb __user *user_lksb; 723 void __user *castparam; 724 void __user *castaddr; 725 void __user *bastparam; 726 void __user *bastaddr; 727 uint64_t xid; 728 }; 729 730 #define DLM_PROC_FLAGS_CLOSING 1 731 #define DLM_PROC_FLAGS_COMPAT 2 732 733 /* locks list is kept so we can remove all a process's locks when it 734 exits (or orphan those that are persistent) */ 735 736 struct dlm_user_proc { 737 dlm_lockspace_t *lockspace; 738 unsigned long flags; /* DLM_PROC_FLAGS */ 739 struct list_head asts; 740 spinlock_t asts_spin; 741 struct list_head locks; 742 spinlock_t locks_spin; 743 struct list_head unlocking; 744 wait_queue_head_t wait; 745 }; 746 747 static inline int dlm_locking_stopped(struct dlm_ls *ls) 748 { 749 return !test_bit(LSFL_RUNNING, &ls->ls_flags); 750 } 751 752 static inline int dlm_recovery_stopped(struct dlm_ls *ls) 753 { 754 return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags); 755 } 756 757 static inline int dlm_no_directory(struct dlm_ls *ls) 758 { 759 return test_bit(LSFL_NODIR, &ls->ls_flags); 760 } 761 762 #ifdef CONFIG_DLM_DEPRECATED_API 763 int dlm_netlink_init(void); 764 void dlm_netlink_exit(void); 765 void dlm_timeout_warn(struct dlm_lkb *lkb); 766 #else 767 static inline int dlm_netlink_init(void) { return 0; } 768 static inline void dlm_netlink_exit(void) { }; 769 static inline void dlm_timeout_warn(struct dlm_lkb *lkb) { }; 770 #endif 771 int dlm_plock_init(void); 772 void dlm_plock_exit(void); 773 774 #ifdef CONFIG_DLM_DEBUG 775 void dlm_register_debugfs(void); 776 void dlm_unregister_debugfs(void); 777 void dlm_create_debug_file(struct dlm_ls *ls); 778 void dlm_delete_debug_file(struct dlm_ls *ls); 779 void *dlm_create_debug_comms_file(int nodeid, void *data); 780 void dlm_delete_debug_comms_file(void *ctx); 781 #else 782 static inline void dlm_register_debugfs(void) { } 783 static inline void dlm_unregister_debugfs(void) { } 784 static inline void dlm_create_debug_file(struct dlm_ls *ls) { } 785 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } 786 static inline void *dlm_create_debug_comms_file(int nodeid, void *data) { return NULL; } 787 static inline void dlm_delete_debug_comms_file(void *ctx) { } 788 #endif 789 790 #endif /* __DLM_INTERNAL_DOT_H__ */ 791 792