David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | ******************************************************************************* |
| 3 | ** |
| 4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| 5 | ** Copyright (C) 2004-2005 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> |
David Teigland | 9013592 | 2006-01-20 08:47:07 +0000 | [diff] [blame] | 38 | #include <linux/mutex.h> |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 39 | #include <asm/semaphore.h> |
| 40 | #include <asm/uaccess.h> |
| 41 | |
| 42 | #include <linux/dlm.h> |
| 43 | |
| 44 | #define DLM_LOCKSPACE_LEN 64 |
| 45 | |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 46 | /* Size of the temp buffer midcomms allocates on the stack. |
| 47 | We try to make this large enough so most messages fit. |
| 48 | FIXME: should sctp make this unnecessary? */ |
| 49 | |
| 50 | #define DLM_INBUF_LEN 148 |
| 51 | |
| 52 | struct dlm_ls; |
| 53 | struct dlm_lkb; |
| 54 | struct dlm_rsb; |
| 55 | struct dlm_member; |
| 56 | struct dlm_lkbtable; |
| 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 | #ifdef DLM_LOG_DEBUG |
| 72 | #define log_debug(ls, fmt, args...) log_error(ls, fmt, ##args) |
| 73 | #else |
| 74 | #define log_debug(ls, fmt, args...) |
| 75 | #endif |
| 76 | |
| 77 | #define DLM_ASSERT(x, do) \ |
| 78 | { \ |
| 79 | if (!(x)) \ |
| 80 | { \ |
| 81 | printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ |
| 82 | "DLM: assertion: \"%s\"\n" \ |
| 83 | "DLM: time = %lu\n", \ |
| 84 | __LINE__, __FILE__, #x, jiffies); \ |
| 85 | {do} \ |
| 86 | printk("\n"); \ |
| 87 | BUG(); \ |
| 88 | panic("DLM: Record message above and reboot.\n"); \ |
| 89 | } \ |
| 90 | } |
| 91 | |
| 92 | |
| 93 | struct dlm_direntry { |
| 94 | struct list_head list; |
| 95 | uint32_t master_nodeid; |
| 96 | uint16_t length; |
| 97 | char name[1]; |
| 98 | }; |
| 99 | |
| 100 | struct dlm_dirtable { |
| 101 | struct list_head list; |
| 102 | rwlock_t lock; |
| 103 | }; |
| 104 | |
| 105 | struct dlm_rsbtable { |
| 106 | struct list_head list; |
| 107 | struct list_head toss; |
| 108 | rwlock_t lock; |
| 109 | }; |
| 110 | |
| 111 | struct dlm_lkbtable { |
| 112 | struct list_head list; |
| 113 | rwlock_t lock; |
| 114 | uint16_t counter; |
| 115 | }; |
| 116 | |
| 117 | /* |
| 118 | * Lockspace member (per node in a ls) |
| 119 | */ |
| 120 | |
| 121 | struct dlm_member { |
| 122 | struct list_head list; |
| 123 | int nodeid; |
| 124 | int weight; |
| 125 | }; |
| 126 | |
| 127 | /* |
| 128 | * Save and manage recovery state for a lockspace. |
| 129 | */ |
| 130 | |
| 131 | struct dlm_recover { |
| 132 | struct list_head list; |
| 133 | int *nodeids; |
| 134 | int node_count; |
| 135 | uint64_t seq; |
| 136 | }; |
| 137 | |
| 138 | /* |
| 139 | * Pass input args to second stage locking function. |
| 140 | */ |
| 141 | |
| 142 | struct dlm_args { |
| 143 | uint32_t flags; |
| 144 | void *astaddr; |
| 145 | long astparam; |
| 146 | void *bastaddr; |
| 147 | int mode; |
| 148 | struct dlm_lksb *lksb; |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 149 | }; |
| 150 | |
| 151 | |
| 152 | /* |
| 153 | * Lock block |
| 154 | * |
| 155 | * A lock can be one of three types: |
| 156 | * |
| 157 | * local copy lock is mastered locally |
| 158 | * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) |
| 159 | * process copy lock is mastered on a remote node |
| 160 | * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) |
| 161 | * master copy master node's copy of a lock owned by remote node |
| 162 | * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) |
| 163 | * |
| 164 | * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or |
| 165 | * dlm_unlock. The dlm does not modify these or use any private flags in |
| 166 | * this field; it only contains DLM_LKF_ flags from dlm.h. These flags |
| 167 | * are sent as-is to the remote master when the lock is remote. |
| 168 | * |
| 169 | * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. |
| 170 | * Some internal flags are shared between the master and process nodes; |
| 171 | * these shared flags are kept in the lower two bytes. One of these |
| 172 | * flags set on the master copy will be propagated to the process copy |
| 173 | * and v.v. Other internal flags are private to the master or process |
| 174 | * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. |
| 175 | * |
| 176 | * lkb_sbflags: status block flags. These flags are copied directly into |
| 177 | * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion |
| 178 | * ast. All defined in dlm.h with DLM_SBF_ prefix. |
| 179 | * |
| 180 | * lkb_status: the lock status indicates which rsb queue the lock is |
| 181 | * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT |
| 182 | * |
| 183 | * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a |
| 184 | * reply is needed. Only set when the lkb is on the lockspace waiters |
| 185 | * list awaiting a reply from a remote node. |
| 186 | * |
| 187 | * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb |
| 188 | * is a master copy, nodeid specifies the remote lock holder, when the |
| 189 | * lkb is a process copy, the nodeid specifies the lock master. |
| 190 | */ |
| 191 | |
| 192 | /* lkb_ast_type */ |
| 193 | |
| 194 | #define AST_COMP 1 |
| 195 | #define AST_BAST 2 |
| 196 | |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 197 | /* lkb_status */ |
| 198 | |
| 199 | #define DLM_LKSTS_WAITING 1 |
| 200 | #define DLM_LKSTS_GRANTED 2 |
| 201 | #define DLM_LKSTS_CONVERT 3 |
| 202 | |
| 203 | /* lkb_flags */ |
| 204 | |
| 205 | #define DLM_IFL_MSTCPY 0x00010000 |
| 206 | #define DLM_IFL_RESEND 0x00020000 |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 207 | |
| 208 | struct dlm_lkb { |
| 209 | struct dlm_rsb *lkb_resource; /* the rsb */ |
| 210 | struct kref lkb_ref; |
| 211 | int lkb_nodeid; /* copied from rsb */ |
| 212 | int lkb_ownpid; /* pid of lock owner */ |
| 213 | uint32_t lkb_id; /* our lock ID */ |
| 214 | uint32_t lkb_remid; /* lock ID on remote partner */ |
| 215 | uint32_t lkb_exflags; /* external flags from caller */ |
| 216 | uint32_t lkb_sbflags; /* lksb flags */ |
| 217 | uint32_t lkb_flags; /* internal flags */ |
| 218 | uint32_t lkb_lvbseq; /* lvb sequence number */ |
| 219 | |
| 220 | int8_t lkb_status; /* granted, waiting, convert */ |
| 221 | int8_t lkb_rqmode; /* requested lock mode */ |
| 222 | int8_t lkb_grmode; /* granted lock mode */ |
| 223 | int8_t lkb_bastmode; /* requested mode */ |
| 224 | int8_t lkb_highbast; /* highest mode bast sent for */ |
| 225 | |
| 226 | int8_t lkb_wait_type; /* type of reply waiting for */ |
| 227 | int8_t lkb_ast_type; /* type of ast queued for */ |
| 228 | |
| 229 | struct list_head lkb_idtbl_list; /* lockspace lkbtbl */ |
| 230 | struct list_head lkb_statequeue; /* rsb g/c/w list */ |
| 231 | struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ |
| 232 | struct list_head lkb_wait_reply; /* waiting for remote reply */ |
| 233 | struct list_head lkb_astqueue; /* need ast to be sent */ |
| 234 | |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 235 | char *lkb_lvbptr; |
| 236 | struct dlm_lksb *lkb_lksb; /* caller's status block */ |
| 237 | void *lkb_astaddr; /* caller's ast function */ |
| 238 | void *lkb_bastaddr; /* caller's bast function */ |
| 239 | long lkb_astparam; /* caller's ast arg */ |
| 240 | }; |
| 241 | |
| 242 | |
| 243 | struct dlm_rsb { |
| 244 | struct dlm_ls *res_ls; /* the lockspace */ |
| 245 | struct kref res_ref; |
David Teigland | 9013592 | 2006-01-20 08:47:07 +0000 | [diff] [blame] | 246 | struct mutex res_mutex; |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 247 | unsigned long res_flags; |
| 248 | int res_length; /* length of rsb name */ |
| 249 | int res_nodeid; |
| 250 | uint32_t res_lvbseq; |
| 251 | uint32_t res_hash; |
| 252 | uint32_t res_bucket; /* rsbtbl */ |
| 253 | unsigned long res_toss_time; |
| 254 | uint32_t res_first_lkid; |
| 255 | struct list_head res_lookup; /* lkbs waiting on first */ |
| 256 | struct list_head res_hashchain; /* rsbtbl */ |
| 257 | struct list_head res_grantqueue; |
| 258 | struct list_head res_convertqueue; |
| 259 | struct list_head res_waitqueue; |
| 260 | |
| 261 | struct list_head res_root_list; /* used for recovery */ |
| 262 | struct list_head res_recover_list; /* used for recovery */ |
| 263 | int res_recover_locks_count; |
| 264 | |
| 265 | char *res_lvbptr; |
| 266 | char res_name[1]; |
| 267 | }; |
| 268 | |
| 269 | /* find_rsb() flags */ |
| 270 | |
| 271 | #define R_MASTER 1 /* only return rsb if it's a master */ |
| 272 | #define R_CREATE 2 /* create/add rsb if not found */ |
| 273 | |
| 274 | /* rsb_flags */ |
| 275 | |
| 276 | enum rsb_flags { |
| 277 | RSB_MASTER_UNCERTAIN, |
| 278 | RSB_VALNOTVALID, |
| 279 | RSB_VALNOTVALID_PREV, |
| 280 | RSB_NEW_MASTER, |
| 281 | RSB_NEW_MASTER2, |
| 282 | RSB_RECOVER_CONVERT, |
David Teigland | 97a35d1 | 2006-05-02 13:34:03 -0400 | [diff] [blame^] | 283 | RSB_LOCKS_PURGED, |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 284 | }; |
| 285 | |
| 286 | static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) |
| 287 | { |
| 288 | __set_bit(flag, &r->res_flags); |
| 289 | } |
| 290 | |
| 291 | static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) |
| 292 | { |
| 293 | __clear_bit(flag, &r->res_flags); |
| 294 | } |
| 295 | |
| 296 | static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) |
| 297 | { |
| 298 | return test_bit(flag, &r->res_flags); |
| 299 | } |
| 300 | |
| 301 | |
| 302 | /* dlm_header is first element of all structs sent between nodes */ |
| 303 | |
| 304 | #define DLM_HEADER_MAJOR 0x00020000 |
| 305 | #define DLM_HEADER_MINOR 0x00000001 |
| 306 | |
| 307 | #define DLM_MSG 1 |
| 308 | #define DLM_RCOM 2 |
| 309 | |
| 310 | struct dlm_header { |
| 311 | uint32_t h_version; |
| 312 | uint32_t h_lockspace; |
| 313 | uint32_t h_nodeid; /* nodeid of sender */ |
| 314 | uint16_t h_length; |
| 315 | uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ |
| 316 | uint8_t h_pad; |
| 317 | }; |
| 318 | |
| 319 | |
| 320 | #define DLM_MSG_REQUEST 1 |
| 321 | #define DLM_MSG_CONVERT 2 |
| 322 | #define DLM_MSG_UNLOCK 3 |
| 323 | #define DLM_MSG_CANCEL 4 |
| 324 | #define DLM_MSG_REQUEST_REPLY 5 |
| 325 | #define DLM_MSG_CONVERT_REPLY 6 |
| 326 | #define DLM_MSG_UNLOCK_REPLY 7 |
| 327 | #define DLM_MSG_CANCEL_REPLY 8 |
| 328 | #define DLM_MSG_GRANT 9 |
| 329 | #define DLM_MSG_BAST 10 |
| 330 | #define DLM_MSG_LOOKUP 11 |
| 331 | #define DLM_MSG_REMOVE 12 |
| 332 | #define DLM_MSG_LOOKUP_REPLY 13 |
| 333 | |
| 334 | struct dlm_message { |
| 335 | struct dlm_header m_header; |
| 336 | uint32_t m_type; /* DLM_MSG_ */ |
| 337 | uint32_t m_nodeid; |
| 338 | uint32_t m_pid; |
| 339 | uint32_t m_lkid; /* lkid on sender */ |
| 340 | uint32_t m_remid; /* lkid on receiver */ |
| 341 | uint32_t m_parent_lkid; |
| 342 | uint32_t m_parent_remid; |
| 343 | uint32_t m_exflags; |
| 344 | uint32_t m_sbflags; |
| 345 | uint32_t m_flags; |
| 346 | uint32_t m_lvbseq; |
| 347 | uint32_t m_hash; |
| 348 | int m_status; |
| 349 | int m_grmode; |
| 350 | int m_rqmode; |
| 351 | int m_bastmode; |
| 352 | int m_asts; |
| 353 | int m_result; /* 0 or -EXXX */ |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 354 | char m_extra[0]; /* name or lvb */ |
| 355 | }; |
| 356 | |
| 357 | |
| 358 | #define DLM_RS_NODES 0x00000001 |
| 359 | #define DLM_RS_NODES_ALL 0x00000002 |
| 360 | #define DLM_RS_DIR 0x00000004 |
| 361 | #define DLM_RS_DIR_ALL 0x00000008 |
| 362 | #define DLM_RS_LOCKS 0x00000010 |
| 363 | #define DLM_RS_LOCKS_ALL 0x00000020 |
| 364 | #define DLM_RS_DONE 0x00000040 |
| 365 | #define DLM_RS_DONE_ALL 0x00000080 |
| 366 | |
| 367 | #define DLM_RCOM_STATUS 1 |
| 368 | #define DLM_RCOM_NAMES 2 |
| 369 | #define DLM_RCOM_LOOKUP 3 |
| 370 | #define DLM_RCOM_LOCK 4 |
| 371 | #define DLM_RCOM_STATUS_REPLY 5 |
| 372 | #define DLM_RCOM_NAMES_REPLY 6 |
| 373 | #define DLM_RCOM_LOOKUP_REPLY 7 |
| 374 | #define DLM_RCOM_LOCK_REPLY 8 |
| 375 | |
| 376 | struct dlm_rcom { |
| 377 | struct dlm_header rc_header; |
| 378 | uint32_t rc_type; /* DLM_RCOM_ */ |
| 379 | int rc_result; /* multi-purpose */ |
| 380 | uint64_t rc_id; /* match reply with request */ |
| 381 | char rc_buf[0]; |
| 382 | }; |
| 383 | |
| 384 | struct rcom_config { |
| 385 | uint32_t rf_lvblen; |
| 386 | uint32_t rf_lsflags; |
| 387 | uint64_t rf_unused; |
| 388 | }; |
| 389 | |
| 390 | struct rcom_lock { |
| 391 | uint32_t rl_ownpid; |
| 392 | uint32_t rl_lkid; |
| 393 | uint32_t rl_remid; |
| 394 | uint32_t rl_parent_lkid; |
| 395 | uint32_t rl_parent_remid; |
| 396 | uint32_t rl_exflags; |
| 397 | uint32_t rl_flags; |
| 398 | uint32_t rl_lvbseq; |
| 399 | int rl_result; |
| 400 | int8_t rl_rqmode; |
| 401 | int8_t rl_grmode; |
| 402 | int8_t rl_status; |
| 403 | int8_t rl_asts; |
| 404 | uint16_t rl_wait_type; |
| 405 | uint16_t rl_namelen; |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 406 | char rl_name[DLM_RESNAME_MAXLEN]; |
| 407 | char rl_lvb[0]; |
| 408 | }; |
| 409 | |
| 410 | struct dlm_ls { |
| 411 | struct list_head ls_list; /* list of lockspaces */ |
| 412 | uint32_t ls_global_id; /* global unique lockspace ID */ |
| 413 | uint32_t ls_exflags; |
| 414 | int ls_lvblen; |
| 415 | int ls_count; /* reference count */ |
| 416 | unsigned long ls_flags; /* LSFL_ */ |
| 417 | struct kobject ls_kobj; |
| 418 | |
| 419 | struct dlm_rsbtable *ls_rsbtbl; |
| 420 | uint32_t ls_rsbtbl_size; |
| 421 | |
| 422 | struct dlm_lkbtable *ls_lkbtbl; |
| 423 | uint32_t ls_lkbtbl_size; |
| 424 | |
| 425 | struct dlm_dirtable *ls_dirtbl; |
| 426 | uint32_t ls_dirtbl_size; |
| 427 | |
David Teigland | 9013592 | 2006-01-20 08:47:07 +0000 | [diff] [blame] | 428 | struct mutex ls_waiters_mutex; |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 429 | struct list_head ls_waiters; /* lkbs needing a reply */ |
| 430 | |
| 431 | struct list_head ls_nodes; /* current nodes in ls */ |
| 432 | struct list_head ls_nodes_gone; /* dead node list, recovery */ |
| 433 | int ls_num_nodes; /* number of nodes in ls */ |
| 434 | int ls_low_nodeid; |
| 435 | int ls_total_weight; |
| 436 | int *ls_node_array; |
| 437 | |
| 438 | struct dlm_rsb ls_stub_rsb; /* for returning errors */ |
| 439 | struct dlm_lkb ls_stub_lkb; /* for returning errors */ |
| 440 | struct dlm_message ls_stub_ms; /* for faking a reply */ |
| 441 | |
| 442 | struct dentry *ls_debug_dentry; /* debugfs */ |
| 443 | |
| 444 | wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ |
| 445 | int ls_uevent_result; |
| 446 | |
| 447 | /* recovery related */ |
| 448 | |
| 449 | struct timer_list ls_timer; |
| 450 | struct task_struct *ls_recoverd_task; |
David Teigland | 9013592 | 2006-01-20 08:47:07 +0000 | [diff] [blame] | 451 | struct mutex ls_recoverd_active; |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 452 | spinlock_t ls_recover_lock; |
| 453 | uint32_t ls_recover_status; /* DLM_RS_ */ |
| 454 | uint64_t ls_recover_seq; |
| 455 | struct dlm_recover *ls_recover_args; |
| 456 | struct rw_semaphore ls_in_recovery; /* block local requests */ |
| 457 | struct list_head ls_requestqueue;/* queue remote requests */ |
David Teigland | 9013592 | 2006-01-20 08:47:07 +0000 | [diff] [blame] | 458 | struct mutex ls_requestqueue_mutex; |
David Teigland | e7fd417 | 2006-01-18 09:30:29 +0000 | [diff] [blame] | 459 | char *ls_recover_buf; |
| 460 | struct list_head ls_recover_list; |
| 461 | spinlock_t ls_recover_list_lock; |
| 462 | int ls_recover_list_count; |
| 463 | wait_queue_head_t ls_wait_general; |
| 464 | |
| 465 | struct list_head ls_root_list; /* root resources */ |
| 466 | struct rw_semaphore ls_root_sem; /* protect root_list */ |
| 467 | |
| 468 | int ls_namelen; |
| 469 | char ls_name[1]; |
| 470 | }; |
| 471 | |
| 472 | #define LSFL_WORK 0 |
| 473 | #define LSFL_RUNNING 1 |
| 474 | #define LSFL_RECOVERY_STOP 2 |
| 475 | #define LSFL_RCOM_READY 3 |
| 476 | #define LSFL_UEVENT_WAIT 4 |
| 477 | |
| 478 | static inline int dlm_locking_stopped(struct dlm_ls *ls) |
| 479 | { |
| 480 | return !test_bit(LSFL_RUNNING, &ls->ls_flags); |
| 481 | } |
| 482 | |
| 483 | static inline int dlm_recovery_stopped(struct dlm_ls *ls) |
| 484 | { |
| 485 | return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags); |
| 486 | } |
| 487 | |
| 488 | static inline int dlm_no_directory(struct dlm_ls *ls) |
| 489 | { |
| 490 | return (ls->ls_exflags & DLM_LSFL_NODIR) ? 1 : 0; |
| 491 | } |
| 492 | |
| 493 | #endif /* __DLM_INTERNAL_DOT_H__ */ |
| 494 | |