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sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/range_tree.h
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* must provide external locking if required. | * must provide external locking if required. | ||||
*/ | */ | ||||
typedef struct range_tree { | typedef struct range_tree { | ||||
avl_tree_t rt_root; /* offset-ordered segment AVL tree */ | avl_tree_t rt_root; /* offset-ordered segment AVL tree */ | ||||
uint64_t rt_space; /* sum of all segments in the map */ | uint64_t rt_space; /* sum of all segments in the map */ | ||||
range_tree_ops_t *rt_ops; | range_tree_ops_t *rt_ops; | ||||
void *rt_arg; | void *rt_arg; | ||||
/* rt_avl_compare should only be set it rt_arg is an AVL tree */ | |||||
uint64_t rt_gap; /* allowable inter-segment gap */ | |||||
int (*rt_avl_compare)(const void *, const void *); | |||||
/* | /* | ||||
* The rt_histogram maintains a histogram of ranges. Each bucket, | * The rt_histogram maintains a histogram of ranges. Each bucket, | ||||
* rt_histogram[i], contains the number of ranges whose size is: | * rt_histogram[i], contains the number of ranges whose size is: | ||||
* 2^i <= size of range in bytes < 2^(i+1) | * 2^i <= size of range in bytes < 2^(i+1) | ||||
*/ | */ | ||||
uint64_t rt_histogram[RANGE_TREE_HISTOGRAM_SIZE]; | uint64_t rt_histogram[RANGE_TREE_HISTOGRAM_SIZE]; | ||||
kmutex_t *rt_lock; /* pointer to lock that protects map */ | |||||
} range_tree_t; | } range_tree_t; | ||||
typedef struct range_seg { | typedef struct range_seg { | ||||
avl_node_t rs_node; /* AVL node */ | avl_node_t rs_node; /* AVL node */ | ||||
avl_node_t rs_pp_node; /* AVL picker-private node */ | avl_node_t rs_pp_node; /* AVL picker-private node */ | ||||
uint64_t rs_start; /* starting offset of this segment */ | uint64_t rs_start; /* starting offset of this segment */ | ||||
uint64_t rs_end; /* ending offset (non-inclusive) */ | uint64_t rs_end; /* ending offset (non-inclusive) */ | ||||
uint64_t rs_fill; /* actual fill if gap mode is on */ | |||||
} range_seg_t; | } range_seg_t; | ||||
struct range_tree_ops { | struct range_tree_ops { | ||||
void (*rtop_create)(range_tree_t *rt, void *arg); | void (*rtop_create)(range_tree_t *rt, void *arg); | ||||
void (*rtop_destroy)(range_tree_t *rt, void *arg); | void (*rtop_destroy)(range_tree_t *rt, void *arg); | ||||
void (*rtop_add)(range_tree_t *rt, range_seg_t *rs, void *arg); | void (*rtop_add)(range_tree_t *rt, range_seg_t *rs, void *arg); | ||||
void (*rtop_remove)(range_tree_t *rt, range_seg_t *rs, void *arg); | void (*rtop_remove)(range_tree_t *rt, range_seg_t *rs, void *arg); | ||||
void (*rtop_vacate)(range_tree_t *rt, void *arg); | void (*rtop_vacate)(range_tree_t *rt, void *arg); | ||||
}; | }; | ||||
typedef void range_tree_func_t(void *arg, uint64_t start, uint64_t size); | typedef void range_tree_func_t(void *arg, uint64_t start, uint64_t size); | ||||
void range_tree_init(void); | void range_tree_init(void); | ||||
void range_tree_fini(void); | void range_tree_fini(void); | ||||
range_tree_t *range_tree_create(range_tree_ops_t *ops, void *arg); | range_tree_t *range_tree_create_impl(range_tree_ops_t *ops, void *arg, | ||||
int (*avl_compare)(const void*, const void*), kmutex_t *lp, uint64_t gap); | |||||
range_tree_t *range_tree_create(range_tree_ops_t *ops, void *arg, kmutex_t *lp); | |||||
void range_tree_destroy(range_tree_t *rt); | void range_tree_destroy(range_tree_t *rt); | ||||
boolean_t range_tree_contains(range_tree_t *rt, uint64_t start, uint64_t size); | boolean_t range_tree_contains(range_tree_t *rt, uint64_t start, uint64_t size); | ||||
range_seg_t *range_tree_find(range_tree_t *rt, uint64_t start, uint64_t size); | |||||
void range_tree_resize_segment(range_tree_t *rt, range_seg_t *rs, | |||||
uint64_t newstart, uint64_t newsize); | |||||
uint64_t range_tree_space(range_tree_t *rt); | uint64_t range_tree_space(range_tree_t *rt); | ||||
boolean_t range_tree_is_empty(range_tree_t *rt); | boolean_t range_tree_is_empty(range_tree_t *rt); | ||||
void range_tree_verify(range_tree_t *rt, uint64_t start, uint64_t size); | void range_tree_verify(range_tree_t *rt, uint64_t start, uint64_t size); | ||||
void range_tree_set_lock(range_tree_t *rt, kmutex_t *lp); | |||||
void range_tree_swap(range_tree_t **rtsrc, range_tree_t **rtdst); | void range_tree_swap(range_tree_t **rtsrc, range_tree_t **rtdst); | ||||
void range_tree_stat_verify(range_tree_t *rt); | void range_tree_stat_verify(range_tree_t *rt); | ||||
void range_tree_add(void *arg, uint64_t start, uint64_t size); | void range_tree_add(void *arg, uint64_t start, uint64_t size); | ||||
void range_tree_remove(void *arg, uint64_t start, uint64_t size); | void range_tree_remove(void *arg, uint64_t start, uint64_t size); | ||||
void range_tree_remove_fill(range_tree_t *rt, uint64_t start, uint64_t size); | |||||
void range_tree_adjust_fill(range_tree_t *rt, range_seg_t *rs, int64_t delta); | |||||
void range_tree_clear(range_tree_t *rt, uint64_t start, uint64_t size); | void range_tree_clear(range_tree_t *rt, uint64_t start, uint64_t size); | ||||
void range_tree_vacate(range_tree_t *rt, range_tree_func_t *func, void *arg); | void range_tree_vacate(range_tree_t *rt, range_tree_func_t *func, void *arg); | ||||
void range_tree_walk(range_tree_t *rt, range_tree_func_t *func, void *arg); | void range_tree_walk(range_tree_t *rt, range_tree_func_t *func, void *arg); | ||||
range_seg_t *range_tree_first(range_tree_t *rt); | |||||
void rt_avl_create(range_tree_t *rt, void *arg); | |||||
void rt_avl_destroy(range_tree_t *rt, void *arg); | |||||
void rt_avl_add(range_tree_t *rt, range_seg_t *rs, void *arg); | |||||
void rt_avl_remove(range_tree_t *rt, range_seg_t *rs, void *arg); | |||||
void rt_avl_vacate(range_tree_t *rt, void *arg); | |||||
extern struct range_tree_ops rt_avl_ops; | |||||
void rt_avl_create(range_tree_t *rt, void *arg); | |||||
void rt_avl_destroy(range_tree_t *rt, void *arg); | |||||
void rt_avl_add(range_tree_t *rt, range_seg_t *rs, void *arg); | |||||
void rt_avl_remove(range_tree_t *rt, range_seg_t *rs, void *arg); | |||||
void rt_avl_vacate(range_tree_t *rt, void *arg); | |||||
extern struct range_tree_ops rt_avl_ops; | |||||
#ifdef __cplusplus | #ifdef __cplusplus | ||||
} | } | ||||
#endif | #endif | ||||
#endif /* _SYS_RANGE_TREE_H */ | #endif /* _SYS_RANGE_TREE_H */ |