Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0 */
2 : /*
3 : * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
4 : * All Rights Reserved.
5 : */
6 : #ifndef __XFS_BMAP_BTREE_H__
7 : #define __XFS_BMAP_BTREE_H__
8 :
9 : struct xfs_btree_cur;
10 : struct xfs_btree_block;
11 : struct xfs_mount;
12 : struct xfs_inode;
13 : struct xfs_trans;
14 : struct xbtree_ifakeroot;
15 :
16 : /*
17 : * Maximum number of bmap btree levels.
18 : */
19 : #define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
20 :
21 : /*
22 : * Prototypes for xfs_bmap.c to call.
23 : */
24 : extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
25 : struct xfs_btree_block *, int);
26 :
27 : void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s);
28 : extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r);
29 : extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r);
30 : void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
31 : struct xfs_bmbt_irec *s);
32 :
33 : extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,
34 : xfs_bmdr_block_t *, int);
35 :
36 : extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
37 : extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
38 : unsigned int xfs_bmbt_maxrecs(struct xfs_mount *mp, unsigned int blocklen,
39 : bool leaf);
40 :
41 : extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip,
42 : int whichfork, xfs_ino_t new_owner,
43 : struct list_head *buffer_list);
44 :
45 : extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
46 : struct xfs_trans *, struct xfs_inode *, int);
47 : struct xfs_btree_cur *xfs_bmbt_stage_cursor(struct xfs_mount *mp,
48 : struct xfs_inode *ip, struct xbtree_ifakeroot *ifake);
49 : void xfs_bmbt_commit_staged_btree(struct xfs_btree_cur *cur,
50 : struct xfs_trans *tp, int whichfork);
51 :
52 : extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
53 : unsigned long long len);
54 :
55 : unsigned int xfs_bmbt_maxlevels_ondisk(void);
56 :
57 : int __init xfs_bmbt_init_cur_cache(void);
58 : void xfs_bmbt_destroy_cur_cache(void);
59 :
60 : /*
61 : * Btree block header size depends on a superblock flag.
62 : */
63 : static inline size_t
64 : xfs_bmbt_block_len(struct xfs_mount *mp)
65 : {
66 >11572*10^7 : return xfs_has_crc(mp) ?
67 >11573*10^7 : XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN;
68 : }
69 :
70 : /* Addresses of key, pointers, and records within an incore bmbt block. */
71 :
72 : static inline struct xfs_bmbt_rec *
73 : xfs_bmbt_rec_addr(
74 : struct xfs_mount *mp,
75 : struct xfs_btree_block *block,
76 : unsigned int index)
77 : {
78 >10846*10^7 : return (struct xfs_bmbt_rec *)
79 >10797*10^7 : ((char *)block + xfs_bmbt_block_len(mp) +
80 >10797*10^7 : (index - 1) * sizeof(struct xfs_bmbt_rec));
81 : }
82 :
83 : static inline struct xfs_bmbt_key *
84 : xfs_bmbt_key_addr(
85 : struct xfs_mount *mp,
86 : struct xfs_btree_block *block,
87 : unsigned int index)
88 : {
89 513690728 : return (struct xfs_bmbt_key *)
90 497261124 : ((char *)block + xfs_bmbt_block_len(mp) +
91 497261124 : (index - 1) * sizeof(struct xfs_bmbt_key *));
92 : }
93 :
94 : static inline xfs_bmbt_ptr_t *
95 : xfs_bmbt_ptr_addr(
96 : struct xfs_mount *mp,
97 : struct xfs_btree_block *block,
98 : unsigned int index,
99 : unsigned int maxrecs)
100 : {
101 6249054609 : return (xfs_bmbt_ptr_t *)
102 : ((char *)block + xfs_bmbt_block_len(mp) +
103 431858998 : maxrecs * sizeof(struct xfs_bmbt_key) +
104 5515360897 : (index - 1) * sizeof(xfs_bmbt_ptr_t));
105 : }
106 :
107 : /* Addresses of key, pointers, and records within an ondisk bmbt block. */
108 :
109 : static inline struct xfs_bmbt_rec *
110 : xfs_bmdr_rec_addr(
111 : struct xfs_bmdr_block *block,
112 : unsigned int index)
113 : {
114 : return (struct xfs_bmbt_rec *)
115 : ((char *)(block + 1) +
116 : (index - 1) * sizeof(struct xfs_bmbt_rec));
117 : }
118 :
119 : static inline struct xfs_bmbt_key *
120 : xfs_bmdr_key_addr(
121 : struct xfs_bmdr_block *block,
122 : unsigned int index)
123 : {
124 14837915 : return (struct xfs_bmbt_key *)
125 0 : ((char *)(block + 1) +
126 0 : (index - 1) * sizeof(struct xfs_bmbt_key));
127 : }
128 :
129 : static inline xfs_bmbt_ptr_t *
130 : xfs_bmdr_ptr_addr(
131 : struct xfs_bmdr_block *block,
132 : unsigned int index,
133 : unsigned int maxrecs)
134 : {
135 14837915 : return (xfs_bmbt_ptr_t *)
136 : ((char *)(block + 1) +
137 14837915 : maxrecs * sizeof(struct xfs_bmbt_key) +
138 : (index - 1) * sizeof(xfs_bmbt_ptr_t));
139 : }
140 :
141 : /*
142 : * Address of pointers within the incore btree root.
143 : *
144 : * These are to be used when we know the size of the block and
145 : * we don't have a cursor.
146 : */
147 : static inline xfs_bmbt_ptr_t *
148 301834811 : xfs_bmap_broot_ptr_addr(
149 : struct xfs_mount *mp,
150 : struct xfs_btree_block *bb,
151 : unsigned int i,
152 : unsigned int sz)
153 : {
154 316729368 : return xfs_bmbt_ptr_addr(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, false));
155 : }
156 :
157 : /*
158 : * Compute the space required for the incore btree root containing the given
159 : * number of records.
160 : */
161 : static inline size_t
162 14287680 : xfs_bmap_broot_space_calc(
163 : struct xfs_mount *mp,
164 : unsigned int level,
165 : unsigned int nrecs)
166 : {
167 14287680 : ASSERT(level > 0);
168 :
169 : /*
170 : * If the bmbt root block is empty, we should be converting the fork
171 : * to extents format. Hence, the size is zero.
172 : */
173 14287680 : if (nrecs == 0)
174 : return 0;
175 :
176 14287680 : return xfs_bmbt_block_len(mp) + \
177 14287680 : (nrecs * (sizeof(struct xfs_bmbt_key) + sizeof(xfs_bmbt_ptr_t)));
178 : }
179 :
180 : /*
181 : * Compute the space required for the incore btree root given the ondisk
182 : * btree root block.
183 : */
184 : static inline size_t
185 12629493 : xfs_bmap_broot_space(
186 : struct xfs_mount *mp,
187 : struct xfs_bmdr_block *bb)
188 : {
189 12629493 : return xfs_bmap_broot_space_calc(mp, 1, be16_to_cpu(bb->bb_numrecs));
190 : }
191 :
192 : /* Compute the space required for the ondisk root block. */
193 : static inline size_t
194 : xfs_bmdr_space_calc(unsigned int nrecs)
195 : {
196 14420646 : return sizeof(struct xfs_bmdr_block) +
197 25315660 : (nrecs * (sizeof(struct xfs_bmbt_key) + sizeof(xfs_bmbt_ptr_t)));
198 : }
199 :
200 : /*
201 : * Compute the space required for the ondisk root block given an incore root
202 : * block.
203 : */
204 : static inline size_t
205 1791155 : xfs_bmap_bmdr_space(struct xfs_btree_block *bb)
206 : {
207 1791155 : return xfs_bmdr_space_calc(be16_to_cpu(bb->bb_numrecs));
208 : }
209 :
210 : void xfs_bmbt_iroot_alloc(struct xfs_inode *ip, int whichfork);
211 :
212 : #endif /* __XFS_BMAP_BTREE_H__ */
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