56 avl_node_t ss_node; /* AVL node */
57 uint64_t ss_start; /* starting offset of this segment */
58 uint64_t ss_end; /* ending offset (non-inclusive) */
59 } space_seg_t;
60
61 typedef struct space_map_obj {
62 uint64_t smo_object; /* on-disk space map object */
63 uint64_t smo_objsize; /* size of the object */
64 uint64_t smo_alloc; /* space allocated from the map */
65 } space_map_obj_t;
66
67 struct space_map_ops {
68 void (*smop_load)(space_map_t *sm);
69 void (*smop_unload)(space_map_t *sm);
70 uint64_t (*smop_alloc)(space_map_t *sm, uint64_t size);
71 void (*smop_claim)(space_map_t *sm, uint64_t start, uint64_t size);
72 void (*smop_free)(space_map_t *sm, uint64_t start, uint64_t size);
73 };
74
75 /*
76 * debug entry
77 *
78 * 1 3 10 50
79 * ,---+--------+------------+---------------------------------.
80 * | 1 | action | syncpass | txg (lower bits) |
81 * `---+--------+------------+---------------------------------'
82 * 63 62 60 59 50 49 0
83 *
84 *
85 *
86 * non-debug entry
87 *
88 * 1 47 1 15
89 * ,-----------------------------------------------------------.
90 * | 0 | offset (sm_shift units) | type | run |
91 * `-----------------------------------------------------------'
92 * 63 62 17 16 15 0
93 */
94
95 /* All this stuff takes and returns bytes */
96 #define SM_RUN_DECODE(x) (BF64_DECODE(x, 0, 15) + 1)
97 #define SM_RUN_ENCODE(x) BF64_ENCODE((x) - 1, 0, 15)
98 #define SM_TYPE_DECODE(x) BF64_DECODE(x, 15, 1)
99 #define SM_TYPE_ENCODE(x) BF64_ENCODE(x, 15, 1)
100 #define SM_OFFSET_DECODE(x) BF64_DECODE(x, 16, 47)
101 #define SM_OFFSET_ENCODE(x) BF64_ENCODE(x, 16, 47)
102 #define SM_DEBUG_DECODE(x) BF64_DECODE(x, 63, 1)
103 #define SM_DEBUG_ENCODE(x) BF64_ENCODE(x, 63, 1)
104
105 #define SM_DEBUG_ACTION_DECODE(x) BF64_DECODE(x, 60, 3)
106 #define SM_DEBUG_ACTION_ENCODE(x) BF64_ENCODE(x, 60, 3)
107
108 #define SM_DEBUG_SYNCPASS_DECODE(x) BF64_DECODE(x, 50, 10)
109 #define SM_DEBUG_SYNCPASS_ENCODE(x) BF64_ENCODE(x, 50, 10)
110
111 #define SM_DEBUG_TXG_DECODE(x) BF64_DECODE(x, 0, 50)
112 #define SM_DEBUG_TXG_ENCODE(x) BF64_ENCODE(x, 0, 50)
113
114 #define SM_RUN_MAX SM_RUN_DECODE(~0ULL)
115
116 #define SM_ALLOC 0x0
117 #define SM_FREE 0x1
118
119 /*
120 * The data for a given space map can be kept on blocks of any size.
121 * Larger blocks entail fewer i/o operations, but they also cause the
122 * DMU to keep more data in-core, and also to waste more i/o bandwidth
123 * when only a few blocks have changed since the last transaction group.
124 * This could use a lot more research, but for now, set the freelist
125 * block size to 4k (2^12).
126 */
127 #define SPACE_MAP_BLOCKSHIFT 12
128
129 typedef void space_map_func_t(space_map_t *sm, uint64_t start, uint64_t size);
130
131 extern void space_map_create(space_map_t *sm, uint64_t start, uint64_t size,
132 uint8_t shift, kmutex_t *lp);
133 extern void space_map_destroy(space_map_t *sm);
134 extern void space_map_add(space_map_t *sm, uint64_t start, uint64_t size);
135 extern void space_map_remove(space_map_t *sm, uint64_t start, uint64_t size);
136 extern int space_map_contains(space_map_t *sm, uint64_t start, uint64_t size);
137 extern void space_map_vacate(space_map_t *sm,
138 space_map_func_t *func, space_map_t *mdest);
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56 avl_node_t ss_node; /* AVL node */
57 uint64_t ss_start; /* starting offset of this segment */
58 uint64_t ss_end; /* ending offset (non-inclusive) */
59 } space_seg_t;
60
61 typedef struct space_map_obj {
62 uint64_t smo_object; /* on-disk space map object */
63 uint64_t smo_objsize; /* size of the object */
64 uint64_t smo_alloc; /* space allocated from the map */
65 } space_map_obj_t;
66
67 struct space_map_ops {
68 void (*smop_load)(space_map_t *sm);
69 void (*smop_unload)(space_map_t *sm);
70 uint64_t (*smop_alloc)(space_map_t *sm, uint64_t size);
71 void (*smop_claim)(space_map_t *sm, uint64_t start, uint64_t size);
72 void (*smop_free)(space_map_t *sm, uint64_t start, uint64_t size);
73 };
74
75 /*
76 * allocation/free entry
77 *
78 * 1 47 1 15
79 * ,---+------------------------------+------+-----------------.
80 * | 0 | offset (sm_shift units) | type | run |
81 * `---+------------------------------+------+-----------------'
82 * 63 62 17 16 15 0
83 *
84 * special entry
85 *
86 * 1 1 6 56
87 * ,---+---+----------+----------------------------------------.
88 * | 1 | 1 | action | <action specific> |
89 * `---+---+----------+----------------------------------------'
90 * 63 62 61 56 55 0
91 *
92 * debug entry
93 *
94 * 1 1 2 10 50
95 * ,---+---+--------+----------+-------------------------------.
96 * | 1 | 0 | action | syncpass | txg (lower bits) |
97 * `---+---+--------+----------+-------------------------------'
98 * 63 62 61 60 59 50 49 0
99 */
100
101 /* All this stuff takes and returns bytes */
102 #define SM_RUN_DECODE(x) (BF64_DECODE(x, 0, 15) + 1)
103 #define SM_RUN_ENCODE(x) BF64_ENCODE((x) - 1, 0, 15)
104 #define SM_TYPE_DECODE(x) BF64_DECODE(x, 15, 1)
105 #define SM_TYPE_ENCODE(x) BF64_ENCODE(x, 15, 1)
106 #define SM_OFFSET_DECODE(x) BF64_DECODE(x, 16, 47)
107 #define SM_OFFSET_ENCODE(x) BF64_ENCODE(x, 16, 47)
108
109 #define SM_IS_SPECIAL(x) (BF64_DECODE(x, 62, 2) == 3)
110 #define SM_SPECIAL_ENCODE() BF64_ENCODE(3, 62, 2)
111 #define SM_IS_DEBUG(x) (BF64_DECODE(x, 62, 2) == 2)
112 #define SM_DEBUG_ENCODE() BF64_ENCODE(2, 62, 2)
113
114 #define SM_SPECIAL_ACTION_DECODE(x) BF64_DECODE(x, 56, 6)
115 #define SM_SPECIAL_ACTION_ENCODE(x) BF64_ENCODE(x, 56, 6)
116
117 #define SM_DEBUG_ACTION_DECODE(x) BF64_DECODE(x, 60, 3)
118 #define SM_DEBUG_ACTION_ENCODE(x) BF64_ENCODE(x, 60, 3)
119 #define SM_DEBUG_SYNCPASS_DECODE(x) BF64_DECODE(x, 50, 10)
120 #define SM_DEBUG_SYNCPASS_ENCODE(x) BF64_ENCODE(x, 50, 10)
121 #define SM_DEBUG_TXG_DECODE(x) BF64_DECODE(x, 0, 50)
122 #define SM_DEBUG_TXG_ENCODE(x) BF64_ENCODE(x, 0, 50)
123
124 #define SM_RUN_MAX SM_RUN_DECODE(~0ULL)
125
126 #define SM_ALLOC 0x0
127 #define SM_FREE 0x1
128
129 #define SM_FOLD 0x01
130
131 /*
132 * The data for a given space map can be kept on blocks of any size.
133 * Larger blocks entail fewer i/o operations, but they also cause the
134 * DMU to keep more data in-core, and also to waste more i/o bandwidth
135 * when only a few blocks have changed since the last transaction group.
136 * This could use a lot more research, but for now, set the freelist
137 * block size to 4k (2^12).
138 */
139 #define SPACE_MAP_BLOCKSHIFT 12
140
141 typedef void space_map_func_t(space_map_t *sm, uint64_t start, uint64_t size);
142
143 extern void space_map_create(space_map_t *sm, uint64_t start, uint64_t size,
144 uint8_t shift, kmutex_t *lp);
145 extern void space_map_destroy(space_map_t *sm);
146 extern void space_map_add(space_map_t *sm, uint64_t start, uint64_t size);
147 extern void space_map_remove(space_map_t *sm, uint64_t start, uint64_t size);
148 extern int space_map_contains(space_map_t *sm, uint64_t start, uint64_t size);
149 extern void space_map_vacate(space_map_t *sm,
150 space_map_func_t *func, space_map_t *mdest);
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