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_recover; 59 struct dlm_header; 60 struct dlm_message; 61 struct dlm_rcom; 62 struct dlm_mhandle; 63 64 #define log_print(fmt, args...) \ 65 printk(KERN_ERR "dlm: "fmt"\n" , ##args) 66 #define log_error(ls, fmt, args...) \ 67 printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) 68 #define log_rinfo(ls, fmt, args...) \ 69 printk(KERN_INFO "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 #define DLM_RTF_SHRINK 0x00000001 102 103 struct dlm_rsbtable { 104 struct rb_root keep; 105 struct rb_root toss; 106 spinlock_t lock; 107 uint32_t flags; 108 }; 109 110 111 /* 112 * Lockspace member (per node in a ls) 113 */ 114 115 struct dlm_member { 116 struct list_head list; 117 int nodeid; 118 int weight; 119 int slot; 120 int slot_prev; 121 int comm_seq; 122 uint32_t generation; 123 }; 124 125 /* 126 * Save and manage recovery state for a lockspace. 127 */ 128 129 struct dlm_recover { 130 struct list_head list; 131 struct dlm_config_node *nodes; 132 int nodes_count; 133 uint64_t seq; 134 }; 135 136 /* 137 * Pass input args to second stage locking function. 138 */ 139 140 struct dlm_args { 141 uint32_t flags; 142 void (*astfn) (void *astparam); 143 void *astparam; 144 void (*bastfn) (void *astparam, int mode); 145 int mode; 146 struct dlm_lksb *lksb; 147 unsigned long timeout; 148 }; 149 150 151 /* 152 * Lock block 153 * 154 * A lock can be one of three types: 155 * 156 * local copy lock is mastered locally 157 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) 158 * process copy lock is mastered on a remote node 159 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) 160 * master copy master node's copy of a lock owned by remote node 161 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) 162 * 163 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or 164 * dlm_unlock. The dlm does not modify these or use any private flags in 165 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags 166 * are sent as-is to the remote master when the lock is remote. 167 * 168 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. 169 * Some internal flags are shared between the master and process nodes; 170 * these shared flags are kept in the lower two bytes. One of these 171 * flags set on the master copy will be propagated to the process copy 172 * and v.v. Other internal flags are private to the master or process 173 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. 174 * 175 * lkb_sbflags: status block flags. These flags are copied directly into 176 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion 177 * ast. All defined in dlm.h with DLM_SBF_ prefix. 178 * 179 * lkb_status: the lock status indicates which rsb queue the lock is 180 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT 181 * 182 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a 183 * reply is needed. Only set when the lkb is on the lockspace waiters 184 * list awaiting a reply from a remote node. 185 * 186 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb 187 * is a master copy, nodeid specifies the remote lock holder, when the 188 * lkb is a process copy, the nodeid specifies the lock master. 189 */ 190 191 /* lkb_status */ 192 193 #define DLM_LKSTS_WAITING 1 194 #define DLM_LKSTS_GRANTED 2 195 #define DLM_LKSTS_CONVERT 3 196 197 /* lkb_flags */ 198 199 #define DLM_IFL_MSTCPY 0x00010000 200 #define DLM_IFL_RESEND 0x00020000 201 #define DLM_IFL_DEAD 0x00040000 202 #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 203 #define DLM_IFL_OVERLAP_CANCEL 0x00100000 204 #define DLM_IFL_ENDOFLIFE 0x00200000 205 #define DLM_IFL_WATCH_TIMEWARN 0x00400000 206 #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 207 #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 208 #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ 209 #define DLM_IFL_USER 0x00000001 210 #define DLM_IFL_ORPHAN 0x00000002 211 212 #define DLM_CALLBACKS_SIZE 6 213 214 #define DLM_CB_CAST 0x00000001 215 #define DLM_CB_BAST 0x00000002 216 #define DLM_CB_SKIP 0x00000004 217 218 struct dlm_callback { 219 uint64_t seq; 220 uint32_t flags; /* DLM_CBF_ */ 221 int sb_status; /* copy to lksb status */ 222 uint8_t sb_flags; /* copy to lksb flags */ 223 int8_t mode; /* rq mode of bast, gr mode of cast */ 224 }; 225 226 struct dlm_lkb { 227 struct dlm_rsb *lkb_resource; /* the rsb */ 228 struct kref lkb_ref; 229 int lkb_nodeid; /* copied from rsb */ 230 int lkb_ownpid; /* pid of lock owner */ 231 uint32_t lkb_id; /* our lock ID */ 232 uint32_t lkb_remid; /* lock ID on remote partner */ 233 uint32_t lkb_exflags; /* external flags from caller */ 234 uint32_t lkb_sbflags; /* lksb flags */ 235 uint32_t lkb_flags; /* internal flags */ 236 uint32_t lkb_lvbseq; /* lvb sequence number */ 237 238 int8_t lkb_status; /* granted, waiting, convert */ 239 int8_t lkb_rqmode; /* requested lock mode */ 240 int8_t lkb_grmode; /* granted lock mode */ 241 int8_t lkb_highbast; /* highest mode bast sent for */ 242 243 int8_t lkb_wait_type; /* type of reply waiting for */ 244 int8_t lkb_wait_count; 245 int lkb_wait_nodeid; /* for debugging */ 246 247 struct list_head lkb_statequeue; /* rsb g/c/w list */ 248 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ 249 struct list_head lkb_wait_reply; /* waiting for remote reply */ 250 struct list_head lkb_ownqueue; /* list of locks for a process */ 251 struct list_head lkb_time_list; 252 ktime_t lkb_timestamp; 253 ktime_t lkb_wait_time; 254 unsigned long lkb_timeout_cs; 255 256 struct mutex lkb_cb_mutex; 257 struct work_struct lkb_cb_work; 258 struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ 259 struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; 260 struct dlm_callback lkb_last_cast; 261 struct dlm_callback lkb_last_bast; 262 ktime_t lkb_last_cast_time; /* for debugging */ 263 ktime_t lkb_last_bast_time; /* for debugging */ 264 265 uint64_t lkb_recover_seq; /* from ls_recover_seq */ 266 267 char *lkb_lvbptr; 268 struct dlm_lksb *lkb_lksb; /* caller's status block */ 269 void (*lkb_astfn) (void *astparam); 270 void (*lkb_bastfn) (void *astparam, int mode); 271 union { 272 void *lkb_astparam; /* caller's ast arg */ 273 struct dlm_user_args *lkb_ua; 274 }; 275 }; 276 277 /* 278 * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real 279 * nodeid, even when nodeid is our_nodeid. 280 * 281 * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid, 282 * greater than zero when another nodeid. 283 * 284 * (TODO: remove res_nodeid and only use res_master_nodeid) 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 int res_master_nodeid; 295 int res_dir_nodeid; 296 int res_id; /* for ls_recover_idr */ 297 uint32_t res_lvbseq; 298 uint32_t res_hash; 299 uint32_t res_bucket; /* rsbtbl */ 300 unsigned long res_toss_time; 301 uint32_t res_first_lkid; 302 struct list_head res_lookup; /* lkbs waiting on first */ 303 union { 304 struct list_head res_hashchain; 305 struct rb_node res_hashnode; /* rsbtbl */ 306 }; 307 struct list_head res_grantqueue; 308 struct list_head res_convertqueue; 309 struct list_head res_waitqueue; 310 311 struct list_head res_root_list; /* used for recovery */ 312 struct list_head res_recover_list; /* used for recovery */ 313 int res_recover_locks_count; 314 315 char *res_lvbptr; 316 char res_name[DLM_RESNAME_MAXLEN+1]; 317 }; 318 319 /* dlm_master_lookup() flags */ 320 321 #define DLM_LU_RECOVER_DIR 1 322 #define DLM_LU_RECOVER_MASTER 2 323 324 /* dlm_master_lookup() results */ 325 326 #define DLM_LU_MATCH 1 327 #define DLM_LU_ADD 2 328 329 /* find_rsb() flags */ 330 331 #define R_REQUEST 0x00000001 332 #define R_RECEIVE_REQUEST 0x00000002 333 #define R_RECEIVE_RECOVER 0x00000004 334 335 /* rsb_flags */ 336 337 enum rsb_flags { 338 RSB_MASTER_UNCERTAIN, 339 RSB_VALNOTVALID, 340 RSB_VALNOTVALID_PREV, 341 RSB_NEW_MASTER, 342 RSB_NEW_MASTER2, 343 RSB_RECOVER_CONVERT, 344 RSB_RECOVER_GRANT, 345 RSB_RECOVER_LVB_INVAL, 346 }; 347 348 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) 349 { 350 __set_bit(flag, &r->res_flags); 351 } 352 353 static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) 354 { 355 __clear_bit(flag, &r->res_flags); 356 } 357 358 static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) 359 { 360 return test_bit(flag, &r->res_flags); 361 } 362 363 364 /* dlm_header is first element of all structs sent between nodes */ 365 366 #define DLM_HEADER_MAJOR 0x00030000 367 #define DLM_HEADER_MINOR 0x00000001 368 369 #define DLM_HEADER_SLOTS 0x00000001 370 371 #define DLM_MSG 1 372 #define DLM_RCOM 2 373 374 struct dlm_header { 375 uint32_t h_version; 376 uint32_t h_lockspace; 377 uint32_t h_nodeid; /* nodeid of sender */ 378 uint16_t h_length; 379 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ 380 uint8_t h_pad; 381 }; 382 383 384 #define DLM_MSG_REQUEST 1 385 #define DLM_MSG_CONVERT 2 386 #define DLM_MSG_UNLOCK 3 387 #define DLM_MSG_CANCEL 4 388 #define DLM_MSG_REQUEST_REPLY 5 389 #define DLM_MSG_CONVERT_REPLY 6 390 #define DLM_MSG_UNLOCK_REPLY 7 391 #define DLM_MSG_CANCEL_REPLY 8 392 #define DLM_MSG_GRANT 9 393 #define DLM_MSG_BAST 10 394 #define DLM_MSG_LOOKUP 11 395 #define DLM_MSG_REMOVE 12 396 #define DLM_MSG_LOOKUP_REPLY 13 397 #define DLM_MSG_PURGE 14 398 399 struct dlm_message { 400 struct dlm_header m_header; 401 uint32_t m_type; /* DLM_MSG_ */ 402 uint32_t m_nodeid; 403 uint32_t m_pid; 404 uint32_t m_lkid; /* lkid on sender */ 405 uint32_t m_remid; /* lkid on receiver */ 406 uint32_t m_parent_lkid; 407 uint32_t m_parent_remid; 408 uint32_t m_exflags; 409 uint32_t m_sbflags; 410 uint32_t m_flags; 411 uint32_t m_lvbseq; 412 uint32_t m_hash; 413 int m_status; 414 int m_grmode; 415 int m_rqmode; 416 int m_bastmode; 417 int m_asts; 418 int m_result; /* 0 or -EXXX */ 419 char m_extra[0]; /* name or lvb */ 420 }; 421 422 423 #define DLM_RS_NODES 0x00000001 424 #define DLM_RS_NODES_ALL 0x00000002 425 #define DLM_RS_DIR 0x00000004 426 #define DLM_RS_DIR_ALL 0x00000008 427 #define DLM_RS_LOCKS 0x00000010 428 #define DLM_RS_LOCKS_ALL 0x00000020 429 #define DLM_RS_DONE 0x00000040 430 #define DLM_RS_DONE_ALL 0x00000080 431 432 #define DLM_RCOM_STATUS 1 433 #define DLM_RCOM_NAMES 2 434 #define DLM_RCOM_LOOKUP 3 435 #define DLM_RCOM_LOCK 4 436 #define DLM_RCOM_STATUS_REPLY 5 437 #define DLM_RCOM_NAMES_REPLY 6 438 #define DLM_RCOM_LOOKUP_REPLY 7 439 #define DLM_RCOM_LOCK_REPLY 8 440 441 struct dlm_rcom { 442 struct dlm_header rc_header; 443 uint32_t rc_type; /* DLM_RCOM_ */ 444 int rc_result; /* multi-purpose */ 445 uint64_t rc_id; /* match reply with request */ 446 uint64_t rc_seq; /* sender's ls_recover_seq */ 447 uint64_t rc_seq_reply; /* remote ls_recover_seq */ 448 char rc_buf[0]; 449 }; 450 451 union dlm_packet { 452 struct dlm_header header; /* common to other two */ 453 struct dlm_message message; 454 struct dlm_rcom rcom; 455 }; 456 457 #define DLM_RSF_NEED_SLOTS 0x00000001 458 459 /* RCOM_STATUS data */ 460 struct rcom_status { 461 __le32 rs_flags; 462 __le32 rs_unused1; 463 __le64 rs_unused2; 464 }; 465 466 /* RCOM_STATUS_REPLY data */ 467 struct rcom_config { 468 __le32 rf_lvblen; 469 __le32 rf_lsflags; 470 471 /* DLM_HEADER_SLOTS adds: */ 472 __le32 rf_flags; 473 __le16 rf_our_slot; 474 __le16 rf_num_slots; 475 __le32 rf_generation; 476 __le32 rf_unused1; 477 __le64 rf_unused2; 478 }; 479 480 struct rcom_slot { 481 __le32 ro_nodeid; 482 __le16 ro_slot; 483 __le16 ro_unused1; 484 __le64 ro_unused2; 485 }; 486 487 struct rcom_lock { 488 __le32 rl_ownpid; 489 __le32 rl_lkid; 490 __le32 rl_remid; 491 __le32 rl_parent_lkid; 492 __le32 rl_parent_remid; 493 __le32 rl_exflags; 494 __le32 rl_flags; 495 __le32 rl_lvbseq; 496 __le32 rl_result; 497 int8_t rl_rqmode; 498 int8_t rl_grmode; 499 int8_t rl_status; 500 int8_t rl_asts; 501 __le16 rl_wait_type; 502 __le16 rl_namelen; 503 char rl_name[DLM_RESNAME_MAXLEN]; 504 char rl_lvb[0]; 505 }; 506 507 /* 508 * The max number of resources per rsbtbl bucket that shrink will attempt 509 * to remove in each iteration. 510 */ 511 512 #define DLM_REMOVE_NAMES_MAX 8 513 514 struct dlm_ls { 515 struct list_head ls_list; /* list of lockspaces */ 516 dlm_lockspace_t *ls_local_handle; 517 uint32_t ls_global_id; /* global unique lockspace ID */ 518 uint32_t ls_generation; 519 uint32_t ls_exflags; 520 int ls_lvblen; 521 int ls_count; /* refcount of processes in 522 the dlm using this ls */ 523 int ls_create_count; /* create/release refcount */ 524 unsigned long ls_flags; /* LSFL_ */ 525 unsigned long ls_scan_time; 526 struct kobject ls_kobj; 527 528 struct idr ls_lkbidr; 529 spinlock_t ls_lkbidr_spin; 530 531 struct dlm_rsbtable *ls_rsbtbl; 532 uint32_t ls_rsbtbl_size; 533 534 struct mutex ls_waiters_mutex; 535 struct list_head ls_waiters; /* lkbs needing a reply */ 536 537 struct mutex ls_orphans_mutex; 538 struct list_head ls_orphans; 539 540 struct mutex ls_timeout_mutex; 541 struct list_head ls_timeout; 542 543 spinlock_t ls_new_rsb_spin; 544 int ls_new_rsb_count; 545 struct list_head ls_new_rsb; /* new rsb structs */ 546 547 spinlock_t ls_remove_spin; 548 char ls_remove_name[DLM_RESNAME_MAXLEN+1]; 549 char *ls_remove_names[DLM_REMOVE_NAMES_MAX]; 550 int ls_remove_len; 551 int ls_remove_lens[DLM_REMOVE_NAMES_MAX]; 552 553 struct list_head ls_nodes; /* current nodes in ls */ 554 struct list_head ls_nodes_gone; /* dead node list, recovery */ 555 int ls_num_nodes; /* number of nodes in ls */ 556 int ls_low_nodeid; 557 int ls_total_weight; 558 int *ls_node_array; 559 560 int ls_slot; 561 int ls_num_slots; 562 int ls_slots_size; 563 struct dlm_slot *ls_slots; 564 565 struct dlm_rsb ls_stub_rsb; /* for returning errors */ 566 struct dlm_lkb ls_stub_lkb; /* for returning errors */ 567 struct dlm_message ls_stub_ms; /* for faking a reply */ 568 569 struct dentry *ls_debug_rsb_dentry; /* debugfs */ 570 struct dentry *ls_debug_waiters_dentry; /* debugfs */ 571 struct dentry *ls_debug_locks_dentry; /* debugfs */ 572 struct dentry *ls_debug_all_dentry; /* debugfs */ 573 struct dentry *ls_debug_toss_dentry; /* debugfs */ 574 575 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ 576 int ls_uevent_result; 577 struct completion ls_members_done; 578 int ls_members_result; 579 580 struct miscdevice ls_device; 581 582 struct workqueue_struct *ls_callback_wq; 583 584 /* recovery related */ 585 586 struct mutex ls_cb_mutex; 587 struct list_head ls_cb_delay; /* save for queue_work later */ 588 struct timer_list ls_timer; 589 struct task_struct *ls_recoverd_task; 590 struct mutex ls_recoverd_active; 591 spinlock_t ls_recover_lock; 592 unsigned long ls_recover_begin; /* jiffies timestamp */ 593 uint32_t ls_recover_status; /* DLM_RS_ */ 594 uint64_t ls_recover_seq; 595 struct dlm_recover *ls_recover_args; 596 struct rw_semaphore ls_in_recovery; /* block local requests */ 597 struct rw_semaphore ls_recv_active; /* block dlm_recv */ 598 struct list_head ls_requestqueue;/* queue remote requests */ 599 struct mutex ls_requestqueue_mutex; 600 struct dlm_rcom *ls_recover_buf; 601 int ls_recover_nodeid; /* for debugging */ 602 unsigned int ls_recover_dir_sent_res; /* for log info */ 603 unsigned int ls_recover_dir_sent_msg; /* for log info */ 604 unsigned int ls_recover_locks_in; /* for log info */ 605 uint64_t ls_rcom_seq; 606 spinlock_t ls_rcom_spin; 607 struct list_head ls_recover_list; 608 spinlock_t ls_recover_list_lock; 609 int ls_recover_list_count; 610 struct idr ls_recover_idr; 611 spinlock_t ls_recover_idr_lock; 612 wait_queue_head_t ls_wait_general; 613 wait_queue_head_t ls_recover_lock_wait; 614 struct mutex ls_clear_proc_locks; 615 616 struct list_head ls_root_list; /* root resources */ 617 struct rw_semaphore ls_root_sem; /* protect root_list */ 618 619 const struct dlm_lockspace_ops *ls_ops; 620 void *ls_ops_arg; 621 622 int ls_namelen; 623 char ls_name[1]; 624 }; 625 626 /* 627 * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines 628 * that they should abort what they're doing so new recovery can be started. 629 * 630 * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it 631 * should do down_write() on the in_recovery rw_semaphore. (doing down_write 632 * within dlm_ls_stop causes complaints about the lock acquired/released 633 * in different contexts.) 634 * 635 * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore. 636 * It sets this after it is done with down_write() on the in_recovery 637 * rw_semaphore and clears it after it has released the rw_semaphore. 638 * 639 * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it 640 * should begin recovery of the lockspace. 641 * 642 * LSFL_RUNNING - set when normal locking activity is enabled. 643 * dlm_ls_stop() clears this to tell dlm locking routines that they should 644 * quit what they are doing so recovery can run. dlm_recoverd sets 645 * this after recovery is finished. 646 */ 647 648 #define LSFL_RECOVER_STOP 0 649 #define LSFL_RECOVER_DOWN 1 650 #define LSFL_RECOVER_LOCK 2 651 #define LSFL_RECOVER_WORK 3 652 #define LSFL_RUNNING 4 653 654 #define LSFL_RCOM_READY 5 655 #define LSFL_RCOM_WAIT 6 656 #define LSFL_UEVENT_WAIT 7 657 #define LSFL_TIMEWARN 8 658 #define LSFL_CB_DELAY 9 659 #define LSFL_NODIR 10 660 661 /* much of this is just saving user space pointers associated with the 662 lock that we pass back to the user lib with an ast */ 663 664 struct dlm_user_args { 665 struct dlm_user_proc *proc; /* each process that opens the lockspace 666 device has private data 667 (dlm_user_proc) on the struct file, 668 the process's locks point back to it*/ 669 struct dlm_lksb lksb; 670 struct dlm_lksb __user *user_lksb; 671 void __user *castparam; 672 void __user *castaddr; 673 void __user *bastparam; 674 void __user *bastaddr; 675 uint64_t xid; 676 }; 677 678 #define DLM_PROC_FLAGS_CLOSING 1 679 #define DLM_PROC_FLAGS_COMPAT 2 680 681 /* locks list is kept so we can remove all a process's locks when it 682 exits (or orphan those that are persistent) */ 683 684 struct dlm_user_proc { 685 dlm_lockspace_t *lockspace; 686 unsigned long flags; /* DLM_PROC_FLAGS */ 687 struct list_head asts; 688 spinlock_t asts_spin; 689 struct list_head locks; 690 spinlock_t locks_spin; 691 struct list_head unlocking; 692 wait_queue_head_t wait; 693 }; 694 695 static inline int dlm_locking_stopped(struct dlm_ls *ls) 696 { 697 return !test_bit(LSFL_RUNNING, &ls->ls_flags); 698 } 699 700 static inline int dlm_recovery_stopped(struct dlm_ls *ls) 701 { 702 return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags); 703 } 704 705 static inline int dlm_no_directory(struct dlm_ls *ls) 706 { 707 return test_bit(LSFL_NODIR, &ls->ls_flags); 708 } 709 710 int dlm_netlink_init(void); 711 void dlm_netlink_exit(void); 712 void dlm_timeout_warn(struct dlm_lkb *lkb); 713 int dlm_plock_init(void); 714 void dlm_plock_exit(void); 715 716 #ifdef CONFIG_DLM_DEBUG 717 int dlm_register_debugfs(void); 718 void dlm_unregister_debugfs(void); 719 int dlm_create_debug_file(struct dlm_ls *ls); 720 void dlm_delete_debug_file(struct dlm_ls *ls); 721 #else 722 static inline int dlm_register_debugfs(void) { return 0; } 723 static inline void dlm_unregister_debugfs(void) { } 724 static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; } 725 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } 726 #endif 727 728 #endif /* __DLM_INTERNAL_DOT_H__ */ 729 730