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 69 #define log_debug(ls, fmt, args...) \ 70 do { \ 71 if (dlm_config.ci_log_debug) \ 72 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ 73 (ls)->ls_name , ##args); \ 74 } while (0) 75 76 #define log_limit(ls, fmt, args...) \ 77 do { \ 78 if (dlm_config.ci_log_debug) \ 79 printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \ 80 (ls)->ls_name , ##args); \ 81 } while (0) 82 83 #define DLM_ASSERT(x, do) \ 84 { \ 85 if (!(x)) \ 86 { \ 87 printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ 88 "DLM: assertion: \"%s\"\n" \ 89 "DLM: time = %lu\n", \ 90 __LINE__, __FILE__, #x, jiffies); \ 91 {do} \ 92 printk("\n"); \ 93 BUG(); \ 94 panic("DLM: Record message above and reboot.\n"); \ 95 } \ 96 } 97 98 99 struct dlm_rsbtable { 100 struct rb_root keep; 101 struct rb_root toss; 102 spinlock_t lock; 103 }; 104 105 106 /* 107 * Lockspace member (per node in a ls) 108 */ 109 110 struct dlm_member { 111 struct list_head list; 112 int nodeid; 113 int weight; 114 int slot; 115 int slot_prev; 116 int comm_seq; 117 uint32_t generation; 118 }; 119 120 /* 121 * Save and manage recovery state for a lockspace. 122 */ 123 124 struct dlm_recover { 125 struct list_head list; 126 struct dlm_config_node *nodes; 127 int nodes_count; 128 uint64_t seq; 129 }; 130 131 /* 132 * Pass input args to second stage locking function. 133 */ 134 135 struct dlm_args { 136 uint32_t flags; 137 void (*astfn) (void *astparam); 138 void *astparam; 139 void (*bastfn) (void *astparam, int mode); 140 int mode; 141 struct dlm_lksb *lksb; 142 unsigned long timeout; 143 }; 144 145 146 /* 147 * Lock block 148 * 149 * A lock can be one of three types: 150 * 151 * local copy lock is mastered locally 152 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) 153 * process copy lock is mastered on a remote node 154 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) 155 * master copy master node's copy of a lock owned by remote node 156 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) 157 * 158 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or 159 * dlm_unlock. The dlm does not modify these or use any private flags in 160 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags 161 * are sent as-is to the remote master when the lock is remote. 162 * 163 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. 164 * Some internal flags are shared between the master and process nodes; 165 * these shared flags are kept in the lower two bytes. One of these 166 * flags set on the master copy will be propagated to the process copy 167 * and v.v. Other internal flags are private to the master or process 168 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. 169 * 170 * lkb_sbflags: status block flags. These flags are copied directly into 171 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion 172 * ast. All defined in dlm.h with DLM_SBF_ prefix. 173 * 174 * lkb_status: the lock status indicates which rsb queue the lock is 175 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT 176 * 177 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a 178 * reply is needed. Only set when the lkb is on the lockspace waiters 179 * list awaiting a reply from a remote node. 180 * 181 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb 182 * is a master copy, nodeid specifies the remote lock holder, when the 183 * lkb is a process copy, the nodeid specifies the lock master. 184 */ 185 186 /* lkb_status */ 187 188 #define DLM_LKSTS_WAITING 1 189 #define DLM_LKSTS_GRANTED 2 190 #define DLM_LKSTS_CONVERT 3 191 192 /* lkb_flags */ 193 194 #define DLM_IFL_MSTCPY 0x00010000 195 #define DLM_IFL_RESEND 0x00020000 196 #define DLM_IFL_DEAD 0x00040000 197 #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 198 #define DLM_IFL_OVERLAP_CANCEL 0x00100000 199 #define DLM_IFL_ENDOFLIFE 0x00200000 200 #define DLM_IFL_WATCH_TIMEWARN 0x00400000 201 #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 202 #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 203 #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ 204 #define DLM_IFL_USER 0x00000001 205 #define DLM_IFL_ORPHAN 0x00000002 206 207 #define DLM_CALLBACKS_SIZE 6 208 209 #define DLM_CB_CAST 0x00000001 210 #define DLM_CB_BAST 0x00000002 211 #define DLM_CB_SKIP 0x00000004 212 213 struct dlm_callback { 214 uint64_t seq; 215 uint32_t flags; /* DLM_CBF_ */ 216 int sb_status; /* copy to lksb status */ 217 uint8_t sb_flags; /* copy to lksb flags */ 218 int8_t mode; /* rq mode of bast, gr mode of cast */ 219 }; 220 221 struct dlm_lkb { 222 struct dlm_rsb *lkb_resource; /* the rsb */ 223 struct kref lkb_ref; 224 int lkb_nodeid; /* copied from rsb */ 225 int lkb_ownpid; /* pid of lock owner */ 226 uint32_t lkb_id; /* our lock ID */ 227 uint32_t lkb_remid; /* lock ID on remote partner */ 228 uint32_t lkb_exflags; /* external flags from caller */ 229 uint32_t lkb_sbflags; /* lksb flags */ 230 uint32_t lkb_flags; /* internal flags */ 231 uint32_t lkb_lvbseq; /* lvb sequence number */ 232 233 int8_t lkb_status; /* granted, waiting, convert */ 234 int8_t lkb_rqmode; /* requested lock mode */ 235 int8_t lkb_grmode; /* granted lock mode */ 236 int8_t lkb_highbast; /* highest mode bast sent for */ 237 238 int8_t lkb_wait_type; /* type of reply waiting for */ 239 int8_t lkb_wait_count; 240 int lkb_wait_nodeid; /* for debugging */ 241 242 struct list_head lkb_statequeue; /* rsb g/c/w list */ 243 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ 244 struct list_head lkb_wait_reply; /* waiting for remote reply */ 245 struct list_head lkb_ownqueue; /* list of locks for a process */ 246 struct list_head lkb_time_list; 247 ktime_t lkb_timestamp; 248 ktime_t lkb_wait_time; 249 unsigned long lkb_timeout_cs; 250 251 struct mutex lkb_cb_mutex; 252 struct work_struct lkb_cb_work; 253 struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ 254 struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; 255 struct dlm_callback lkb_last_cast; 256 struct dlm_callback lkb_last_bast; 257 ktime_t lkb_last_cast_time; /* for debugging */ 258 ktime_t lkb_last_bast_time; /* for debugging */ 259 260 uint64_t lkb_recover_seq; /* from ls_recover_seq */ 261 262 char *lkb_lvbptr; 263 struct dlm_lksb *lkb_lksb; /* caller's status block */ 264 void (*lkb_astfn) (void *astparam); 265 void (*lkb_bastfn) (void *astparam, int mode); 266 union { 267 void *lkb_astparam; /* caller's ast arg */ 268 struct dlm_user_args *lkb_ua; 269 }; 270 }; 271 272 /* 273 * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real 274 * nodeid, even when nodeid is our_nodeid. 275 * 276 * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid, 277 * greater than zero when another nodeid. 278 * 279 * (TODO: remove res_nodeid and only use res_master_nodeid) 280 */ 281 282 struct dlm_rsb { 283 struct dlm_ls *res_ls; /* the lockspace */ 284 struct kref res_ref; 285 struct mutex res_mutex; 286 unsigned long res_flags; 287 int res_length; /* length of rsb name */ 288 int res_nodeid; 289 int res_master_nodeid; 290 int res_dir_nodeid; 291 int res_id; /* for ls_recover_idr */ 292 uint32_t res_lvbseq; 293 uint32_t res_hash; 294 uint32_t res_bucket; /* rsbtbl */ 295 unsigned long res_toss_time; 296 uint32_t res_first_lkid; 297 struct list_head res_lookup; /* lkbs waiting on first */ 298 union { 299 struct list_head res_hashchain; 300 struct rb_node res_hashnode; /* rsbtbl */ 301 }; 302 struct list_head res_grantqueue; 303 struct list_head res_convertqueue; 304 struct list_head res_waitqueue; 305 306 struct list_head res_root_list; /* used for recovery */ 307 struct list_head res_recover_list; /* used for recovery */ 308 int res_recover_locks_count; 309 310 char *res_lvbptr; 311 char res_name[DLM_RESNAME_MAXLEN+1]; 312 }; 313 314 /* dlm_master_lookup() flags */ 315 316 #define DLM_LU_RECOVER_DIR 1 317 #define DLM_LU_RECOVER_MASTER 2 318 319 /* dlm_master_lookup() results */ 320 321 #define DLM_LU_MATCH 1 322 #define DLM_LU_ADD 2 323 324 /* find_rsb() flags */ 325 326 #define R_REQUEST 0x00000001 327 #define R_RECEIVE_REQUEST 0x00000002 328 #define R_RECEIVE_RECOVER 0x00000004 329 330 /* rsb_flags */ 331 332 enum rsb_flags { 333 RSB_MASTER_UNCERTAIN, 334 RSB_VALNOTVALID, 335 RSB_VALNOTVALID_PREV, 336 RSB_NEW_MASTER, 337 RSB_NEW_MASTER2, 338 RSB_RECOVER_CONVERT, 339 RSB_RECOVER_GRANT, 340 RSB_RECOVER_LVB_INVAL, 341 }; 342 343 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) 344 { 345 __set_bit(flag, &r->res_flags); 346 } 347 348 static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) 349 { 350 __clear_bit(flag, &r->res_flags); 351 } 352 353 static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) 354 { 355 return test_bit(flag, &r->res_flags); 356 } 357 358 359 /* dlm_header is first element of all structs sent between nodes */ 360 361 #define DLM_HEADER_MAJOR 0x00030000 362 #define DLM_HEADER_MINOR 0x00000001 363 364 #define DLM_HEADER_SLOTS 0x00000001 365 366 #define DLM_MSG 1 367 #define DLM_RCOM 2 368 369 struct dlm_header { 370 uint32_t h_version; 371 uint32_t h_lockspace; 372 uint32_t h_nodeid; /* nodeid of sender */ 373 uint16_t h_length; 374 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ 375 uint8_t h_pad; 376 }; 377 378 379 #define DLM_MSG_REQUEST 1 380 #define DLM_MSG_CONVERT 2 381 #define DLM_MSG_UNLOCK 3 382 #define DLM_MSG_CANCEL 4 383 #define DLM_MSG_REQUEST_REPLY 5 384 #define DLM_MSG_CONVERT_REPLY 6 385 #define DLM_MSG_UNLOCK_REPLY 7 386 #define DLM_MSG_CANCEL_REPLY 8 387 #define DLM_MSG_GRANT 9 388 #define DLM_MSG_BAST 10 389 #define DLM_MSG_LOOKUP 11 390 #define DLM_MSG_REMOVE 12 391 #define DLM_MSG_LOOKUP_REPLY 13 392 #define DLM_MSG_PURGE 14 393 394 struct dlm_message { 395 struct dlm_header m_header; 396 uint32_t m_type; /* DLM_MSG_ */ 397 uint32_t m_nodeid; 398 uint32_t m_pid; 399 uint32_t m_lkid; /* lkid on sender */ 400 uint32_t m_remid; /* lkid on receiver */ 401 uint32_t m_parent_lkid; 402 uint32_t m_parent_remid; 403 uint32_t m_exflags; 404 uint32_t m_sbflags; 405 uint32_t m_flags; 406 uint32_t m_lvbseq; 407 uint32_t m_hash; 408 int m_status; 409 int m_grmode; 410 int m_rqmode; 411 int m_bastmode; 412 int m_asts; 413 int m_result; /* 0 or -EXXX */ 414 char m_extra[0]; /* name or lvb */ 415 }; 416 417 418 #define DLM_RS_NODES 0x00000001 419 #define DLM_RS_NODES_ALL 0x00000002 420 #define DLM_RS_DIR 0x00000004 421 #define DLM_RS_DIR_ALL 0x00000008 422 #define DLM_RS_LOCKS 0x00000010 423 #define DLM_RS_LOCKS_ALL 0x00000020 424 #define DLM_RS_DONE 0x00000040 425 #define DLM_RS_DONE_ALL 0x00000080 426 427 #define DLM_RCOM_STATUS 1 428 #define DLM_RCOM_NAMES 2 429 #define DLM_RCOM_LOOKUP 3 430 #define DLM_RCOM_LOCK 4 431 #define DLM_RCOM_STATUS_REPLY 5 432 #define DLM_RCOM_NAMES_REPLY 6 433 #define DLM_RCOM_LOOKUP_REPLY 7 434 #define DLM_RCOM_LOCK_REPLY 8 435 436 struct dlm_rcom { 437 struct dlm_header rc_header; 438 uint32_t rc_type; /* DLM_RCOM_ */ 439 int rc_result; /* multi-purpose */ 440 uint64_t rc_id; /* match reply with request */ 441 uint64_t rc_seq; /* sender's ls_recover_seq */ 442 uint64_t rc_seq_reply; /* remote ls_recover_seq */ 443 char rc_buf[0]; 444 }; 445 446 union dlm_packet { 447 struct dlm_header header; /* common to other two */ 448 struct dlm_message message; 449 struct dlm_rcom rcom; 450 }; 451 452 #define DLM_RSF_NEED_SLOTS 0x00000001 453 454 /* RCOM_STATUS data */ 455 struct rcom_status { 456 __le32 rs_flags; 457 __le32 rs_unused1; 458 __le64 rs_unused2; 459 }; 460 461 /* RCOM_STATUS_REPLY data */ 462 struct rcom_config { 463 __le32 rf_lvblen; 464 __le32 rf_lsflags; 465 466 /* DLM_HEADER_SLOTS adds: */ 467 __le32 rf_flags; 468 __le16 rf_our_slot; 469 __le16 rf_num_slots; 470 __le32 rf_generation; 471 __le32 rf_unused1; 472 __le64 rf_unused2; 473 }; 474 475 struct rcom_slot { 476 __le32 ro_nodeid; 477 __le16 ro_slot; 478 __le16 ro_unused1; 479 __le64 ro_unused2; 480 }; 481 482 struct rcom_lock { 483 __le32 rl_ownpid; 484 __le32 rl_lkid; 485 __le32 rl_remid; 486 __le32 rl_parent_lkid; 487 __le32 rl_parent_remid; 488 __le32 rl_exflags; 489 __le32 rl_flags; 490 __le32 rl_lvbseq; 491 __le32 rl_result; 492 int8_t rl_rqmode; 493 int8_t rl_grmode; 494 int8_t rl_status; 495 int8_t rl_asts; 496 __le16 rl_wait_type; 497 __le16 rl_namelen; 498 char rl_name[DLM_RESNAME_MAXLEN]; 499 char rl_lvb[0]; 500 }; 501 502 /* 503 * The max number of resources per rsbtbl bucket that shrink will attempt 504 * to remove in each iteration. 505 */ 506 507 #define DLM_REMOVE_NAMES_MAX 8 508 509 struct dlm_ls { 510 struct list_head ls_list; /* list of lockspaces */ 511 dlm_lockspace_t *ls_local_handle; 512 uint32_t ls_global_id; /* global unique lockspace ID */ 513 uint32_t ls_generation; 514 uint32_t ls_exflags; 515 int ls_lvblen; 516 int ls_count; /* refcount of processes in 517 the dlm using this ls */ 518 int ls_create_count; /* create/release refcount */ 519 unsigned long ls_flags; /* LSFL_ */ 520 unsigned long ls_scan_time; 521 struct kobject ls_kobj; 522 523 struct idr ls_lkbidr; 524 spinlock_t ls_lkbidr_spin; 525 526 struct dlm_rsbtable *ls_rsbtbl; 527 uint32_t ls_rsbtbl_size; 528 529 struct mutex ls_waiters_mutex; 530 struct list_head ls_waiters; /* lkbs needing a reply */ 531 532 struct mutex ls_orphans_mutex; 533 struct list_head ls_orphans; 534 535 struct mutex ls_timeout_mutex; 536 struct list_head ls_timeout; 537 538 spinlock_t ls_new_rsb_spin; 539 int ls_new_rsb_count; 540 struct list_head ls_new_rsb; /* new rsb structs */ 541 542 spinlock_t ls_remove_spin; 543 char ls_remove_name[DLM_RESNAME_MAXLEN+1]; 544 char *ls_remove_names[DLM_REMOVE_NAMES_MAX]; 545 int ls_remove_len; 546 int ls_remove_lens[DLM_REMOVE_NAMES_MAX]; 547 548 struct list_head ls_nodes; /* current nodes in ls */ 549 struct list_head ls_nodes_gone; /* dead node list, recovery */ 550 int ls_num_nodes; /* number of nodes in ls */ 551 int ls_low_nodeid; 552 int ls_total_weight; 553 int *ls_node_array; 554 555 int ls_slot; 556 int ls_num_slots; 557 int ls_slots_size; 558 struct dlm_slot *ls_slots; 559 560 struct dlm_rsb ls_stub_rsb; /* for returning errors */ 561 struct dlm_lkb ls_stub_lkb; /* for returning errors */ 562 struct dlm_message ls_stub_ms; /* for faking a reply */ 563 564 struct dentry *ls_debug_rsb_dentry; /* debugfs */ 565 struct dentry *ls_debug_waiters_dentry; /* debugfs */ 566 struct dentry *ls_debug_locks_dentry; /* debugfs */ 567 struct dentry *ls_debug_all_dentry; /* debugfs */ 568 struct dentry *ls_debug_toss_dentry; /* debugfs */ 569 570 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ 571 int ls_uevent_result; 572 struct completion ls_members_done; 573 int ls_members_result; 574 575 struct miscdevice ls_device; 576 577 struct workqueue_struct *ls_callback_wq; 578 579 /* recovery related */ 580 581 struct mutex ls_cb_mutex; 582 struct list_head ls_cb_delay; /* save for queue_work later */ 583 struct timer_list ls_timer; 584 struct task_struct *ls_recoverd_task; 585 struct mutex ls_recoverd_active; 586 spinlock_t ls_recover_lock; 587 unsigned long ls_recover_begin; /* jiffies timestamp */ 588 uint32_t ls_recover_status; /* DLM_RS_ */ 589 uint64_t ls_recover_seq; 590 struct dlm_recover *ls_recover_args; 591 struct rw_semaphore ls_in_recovery; /* block local requests */ 592 struct rw_semaphore ls_recv_active; /* block dlm_recv */ 593 struct list_head ls_requestqueue;/* queue remote requests */ 594 struct mutex ls_requestqueue_mutex; 595 struct dlm_rcom *ls_recover_buf; 596 int ls_recover_nodeid; /* for debugging */ 597 unsigned int ls_recover_dir_sent_res; /* for log info */ 598 unsigned int ls_recover_dir_sent_msg; /* for log info */ 599 unsigned int ls_recover_locks_in; /* for log info */ 600 uint64_t ls_rcom_seq; 601 spinlock_t ls_rcom_spin; 602 struct list_head ls_recover_list; 603 spinlock_t ls_recover_list_lock; 604 int ls_recover_list_count; 605 struct idr ls_recover_idr; 606 spinlock_t ls_recover_idr_lock; 607 wait_queue_head_t ls_wait_general; 608 wait_queue_head_t ls_recover_lock_wait; 609 struct mutex ls_clear_proc_locks; 610 611 struct list_head ls_root_list; /* root resources */ 612 struct rw_semaphore ls_root_sem; /* protect root_list */ 613 614 const struct dlm_lockspace_ops *ls_ops; 615 void *ls_ops_arg; 616 617 int ls_namelen; 618 char ls_name[1]; 619 }; 620 621 /* 622 * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines 623 * that they should abort what they're doing so new recovery can be started. 624 * 625 * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it 626 * should do down_write() on the in_recovery rw_semaphore. (doing down_write 627 * within dlm_ls_stop causes complaints about the lock acquired/released 628 * in different contexts.) 629 * 630 * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore. 631 * It sets this after it is done with down_write() on the in_recovery 632 * rw_semaphore and clears it after it has released the rw_semaphore. 633 * 634 * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it 635 * should begin recovery of the lockspace. 636 * 637 * LSFL_RUNNING - set when normal locking activity is enabled. 638 * dlm_ls_stop() clears this to tell dlm locking routines that they should 639 * quit what they are doing so recovery can run. dlm_recoverd sets 640 * this after recovery is finished. 641 */ 642 643 #define LSFL_RECOVER_STOP 0 644 #define LSFL_RECOVER_DOWN 1 645 #define LSFL_RECOVER_LOCK 2 646 #define LSFL_RECOVER_WORK 3 647 #define LSFL_RUNNING 4 648 649 #define LSFL_RCOM_READY 5 650 #define LSFL_RCOM_WAIT 6 651 #define LSFL_UEVENT_WAIT 7 652 #define LSFL_TIMEWARN 8 653 #define LSFL_CB_DELAY 9 654 #define LSFL_NODIR 10 655 656 /* much of this is just saving user space pointers associated with the 657 lock that we pass back to the user lib with an ast */ 658 659 struct dlm_user_args { 660 struct dlm_user_proc *proc; /* each process that opens the lockspace 661 device has private data 662 (dlm_user_proc) on the struct file, 663 the process's locks point back to it*/ 664 struct dlm_lksb lksb; 665 struct dlm_lksb __user *user_lksb; 666 void __user *castparam; 667 void __user *castaddr; 668 void __user *bastparam; 669 void __user *bastaddr; 670 uint64_t xid; 671 }; 672 673 #define DLM_PROC_FLAGS_CLOSING 1 674 #define DLM_PROC_FLAGS_COMPAT 2 675 676 /* locks list is kept so we can remove all a process's locks when it 677 exits (or orphan those that are persistent) */ 678 679 struct dlm_user_proc { 680 dlm_lockspace_t *lockspace; 681 unsigned long flags; /* DLM_PROC_FLAGS */ 682 struct list_head asts; 683 spinlock_t asts_spin; 684 struct list_head locks; 685 spinlock_t locks_spin; 686 struct list_head unlocking; 687 wait_queue_head_t wait; 688 }; 689 690 static inline int dlm_locking_stopped(struct dlm_ls *ls) 691 { 692 return !test_bit(LSFL_RUNNING, &ls->ls_flags); 693 } 694 695 static inline int dlm_recovery_stopped(struct dlm_ls *ls) 696 { 697 return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags); 698 } 699 700 static inline int dlm_no_directory(struct dlm_ls *ls) 701 { 702 return test_bit(LSFL_NODIR, &ls->ls_flags); 703 } 704 705 int dlm_netlink_init(void); 706 void dlm_netlink_exit(void); 707 void dlm_timeout_warn(struct dlm_lkb *lkb); 708 int dlm_plock_init(void); 709 void dlm_plock_exit(void); 710 711 #ifdef CONFIG_DLM_DEBUG 712 int dlm_register_debugfs(void); 713 void dlm_unregister_debugfs(void); 714 int dlm_create_debug_file(struct dlm_ls *ls); 715 void dlm_delete_debug_file(struct dlm_ls *ls); 716 #else 717 static inline int dlm_register_debugfs(void) { return 0; } 718 static inline void dlm_unregister_debugfs(void) { } 719 static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; } 720 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } 721 #endif 722 723 #endif /* __DLM_INTERNAL_DOT_H__ */ 724 725