bsd/kern/kern_lockf.c

77 #include <sys/lockf.h>
91 void lf_print(const char *tag, struct lockf *lock);
92 void lf_printlist(const char *tag, struct lockf *lock);
110 MALLOC_DEFINE(M_LOCKF, "lockf", "Byte-range locking structures");
112 #define NOLOCKF (struct lockf *)0
129 static int	 lf_clearlock(struct lockf *);
130 static overlap_t lf_findoverlap(struct lockf *,
131 	    struct lockf *, int, struct lockf ***, struct lockf **);
132 static struct lockf *lf_getblock(struct lockf *, pid_t);
133 static int	 lf_getlock(struct lockf *, struct flock *, pid_t);
134 static int	 lf_setlock(struct lockf *, struct timespec *);
135 static int	 lf_split(struct lockf *, struct lockf *);
136 static void	 lf_wakelock(struct lockf *, boolean_t);
138 static void	 lf_hold_assertion(task_t, struct lockf *);
139 static void	 lf_jump_to_queue_head(struct lockf *, struct lockf *);
140 static void	 lf_drop_assertion(struct lockf *);
174 	struct lockf *lock;
178 	struct lockf **head = &vp->v_lockf;
185 	if (*head == (struct lockf *)0) {
257 	 * Create the lockf structure
259 	MALLOC(lock, struct lockf *, sizeof *lock, M_LOCKF, M_WAITOK);
268 	lock->lf_next = (struct lockf *)0;
278 	lck_mtx_lock(&vp->v_lock);	/* protect the lockf list */
318 	struct lockf *lock;
326 		struct lockf *tlock;
346 lf_move_blocked(struct lockf *to, struct lockf *from)
348 	struct lockf *tlock;
371 lf_coalesce_adjacent(struct lockf *lock)
373 	struct lockf **lf = lock->lf_head;
390 			struct lockf *adjacent = *lf;
405 			struct lockf *adjacent = *lf;
451 lf_setlock(struct lockf *lock, struct timespec *timeout)
453 	struct lockf *block;
454 	struct lockf **head = lock->lf_head;
455 	struct lockf **prev, *overlap, *ltmp;
456 	static char lockstr[] = "lockf";
505 			struct lockf *waitblock;
520 				while (((waitblock = (struct lockf *)ut->uu_wchan) != NULL) &&
523 					waitblock = (struct lockf *)ut->uu_wchan;
826 lf_clearlock(struct lockf *unlock)
828 	struct lockf **head = unlock->lf_head;
829 	struct lockf *lf = *head;
830 	struct lockf *overlap, **prev;
925 lf_getlock(struct lockf *lock, struct flock *fl, pid_t matchpid)
927 	struct lockf *block;
966  *					struct lockf.
968 static struct lockf *
969 lf_getblock(struct lockf *lock, pid_t matchpid)
971 	struct lockf **prev, *overlap, *lf = *(lock->lf_head);
1041 lf_findoverlap(struct lockf *lf, struct lockf *lock, int type,
1042 	       struct lockf ***prev, struct lockf **overlap)
1160 lf_split(struct lockf *lock1, struct lockf *lock2)
1162 	struct lockf *splitlock;
1188 	MALLOC(splitlock, struct lockf *, sizeof *splitlock, M_LOCKF, M_WAITOK);
1225 lf_wakelock(struct lockf *listhead, boolean_t force_all)
1227 	struct lockf *wakelock;
1251 			        struct lockf *tlock;
1283 lf_print(const char *tag, struct lockf *lock)
1323 lf_printlist(const char *tag, struct lockf *lock)
1325 	struct lockf *lf, *blk;
1386 lf_hold_assertion(task_t block_task, struct lockf *block)
1400  * Parameters: block                    lockf struct containing the
1402  *             lock                     lockf struct to be jumped to the
1408 lf_jump_to_queue_head(struct lockf *block, struct lockf *lock)
1421  * Parameters: block                    lockf struct holding the assertion.
1426 lf_drop_assertion(struct lockf *block)