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37b3b4d6 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2bd0ea18 | 2 | /* |
f302e9e4 NS |
3 | * Copyright (c) 2000,2005 Silicon Graphics, Inc. |
4 | * All Rights Reserved. | |
2bd0ea18 NS |
5 | */ |
6 | #ifndef __XFS_IALLOC_H__ | |
dfc130f3 | 7 | #define __XFS_IALLOC_H__ |
2bd0ea18 NS |
8 | |
9 | struct xfs_buf; | |
10 | struct xfs_dinode; | |
56b2de80 | 11 | struct xfs_imap; |
2bd0ea18 NS |
12 | struct xfs_mount; |
13 | struct xfs_trans; | |
34b8c759 | 14 | struct xfs_btree_cur; |
2bd0ea18 | 15 | |
ff105f75 | 16 | /* Move inodes in clusters of this size */ |
dfc130f3 | 17 | #define XFS_INODE_BIG_CLUSTER_SIZE 8192 |
ff105f75 | 18 | |
5a3b2e0a BF |
19 | struct xfs_icluster { |
20 | bool deleted; /* record is deleted */ | |
21 | xfs_ino_t first_ino; /* first inode number */ | |
22 | uint64_t alloc; /* inode phys. allocation bitmap for | |
23 | * sparse chunks */ | |
24 | }; | |
25 | ||
ff105f75 DC |
26 | /* Calculate and return the number of filesystem blocks per inode cluster */ |
27 | static inline int | |
28 | xfs_icluster_size_fsb( | |
29 | struct xfs_mount *mp) | |
30 | { | |
31 | if (mp->m_sb.sb_blocksize >= mp->m_inode_cluster_size) | |
32 | return 1; | |
33 | return mp->m_inode_cluster_size >> mp->m_sb.sb_blocklog; | |
34 | } | |
2bd0ea18 NS |
35 | |
36 | /* | |
37 | * Make an inode pointer out of the buffer/offset. | |
38 | */ | |
f302e9e4 NS |
39 | static inline struct xfs_dinode * |
40 | xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o) | |
41 | { | |
92acb899 | 42 | return xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog); |
f302e9e4 | 43 | } |
2bd0ea18 | 44 | |
2bd0ea18 NS |
45 | /* |
46 | * Allocate an inode on disk. | |
47 | * Mode is used to tell whether the new inode will need space, and whether | |
48 | * it is a directory. | |
49 | * | |
50 | * To work within the constraint of one allocation per transaction, | |
51 | * xfs_dialloc() is designed to be called twice if it has to do an | |
dfc130f3 | 52 | * allocation to make more free inodes. If an inode is |
2bd0ea18 NS |
53 | * available without an allocation, agbp would be set to the current |
54 | * agbp and alloc_done set to false. | |
55 | * If an allocation needed to be done, agbp would be set to the | |
56 | * inode header of the allocation group and alloc_done set to true. | |
57 | * The caller should then commit the current transaction and allocate a new | |
dfc130f3 | 58 | * transaction. xfs_dialloc() should then be called again with |
2bd0ea18 NS |
59 | * the agbp value returned from the previous call. |
60 | * | |
61 | * Once we successfully pick an inode its number is returned and the | |
dfc130f3 | 62 | * on-disk data structures are updated. The inode itself is not read |
2bd0ea18 NS |
63 | * in, since doing so would break ordering constraints with xfs_reclaim. |
64 | * | |
65 | * *agbp should be set to NULL on the first call, *alloc_done set to FALSE. | |
66 | */ | |
67 | int /* error */ | |
68 | xfs_dialloc( | |
69 | struct xfs_trans *tp, /* transaction pointer */ | |
70 | xfs_ino_t parent, /* parent inode (directory) */ | |
a2ceac1f | 71 | umode_t mode, /* mode bits for new inode */ |
2bd0ea18 | 72 | struct xfs_buf **agbp, /* buf for a.g. inode header */ |
2bd0ea18 NS |
73 | xfs_ino_t *inop); /* inode number allocated */ |
74 | ||
75 | /* | |
76 | * Free disk inode. Carefully avoids touching the incore inode, all | |
77 | * manipulations incore are the caller's responsibility. | |
78 | * The on-disk inode is not changed by this operation, only the | |
79 | * btree (free inode mask) is changed. | |
80 | */ | |
81 | int /* error */ | |
82 | xfs_difree( | |
83 | struct xfs_trans *tp, /* transaction pointer */ | |
23aab3f9 | 84 | xfs_ino_t inode, /* inode to be freed */ |
5a3b2e0a | 85 | struct xfs_icluster *ifree); /* cluster info if deleted */ |
2bd0ea18 NS |
86 | |
87 | /* | |
56b2de80 | 88 | * Return the location of the inode in imap, for mapping it into a buffer. |
2bd0ea18 NS |
89 | */ |
90 | int | |
56b2de80 | 91 | xfs_imap( |
2bd0ea18 NS |
92 | struct xfs_mount *mp, /* file system mount structure */ |
93 | struct xfs_trans *tp, /* transaction pointer */ | |
94 | xfs_ino_t ino, /* inode to locate */ | |
56b2de80 | 95 | struct xfs_imap *imap, /* location map structure */ |
2bd0ea18 NS |
96 | uint flags); /* flags for inode btree lookup */ |
97 | ||
98 | /* | |
99 | * Compute and fill in value of m_in_maxlevels. | |
100 | */ | |
101 | void | |
102 | xfs_ialloc_compute_maxlevels( | |
103 | struct xfs_mount *mp); /* file system mount structure */ | |
104 | ||
105 | /* | |
106 | * Log specified fields for the ag hdr (inode section) | |
107 | */ | |
108 | void | |
109 | xfs_ialloc_log_agi( | |
110 | struct xfs_trans *tp, /* transaction pointer */ | |
111 | struct xfs_buf *bp, /* allocation group header buffer */ | |
112 | int fields); /* bitmask of fields to log */ | |
113 | ||
114 | /* | |
115 | * Read in the allocation group header (inode allocation section) | |
116 | */ | |
117 | int /* error */ | |
118 | xfs_ialloc_read_agi( | |
119 | struct xfs_mount *mp, /* file system mount structure */ | |
120 | struct xfs_trans *tp, /* transaction pointer */ | |
121 | xfs_agnumber_t agno, /* allocation group number */ | |
122 | struct xfs_buf **bpp); /* allocation group hdr buf */ | |
123 | ||
cdded3d8 DC |
124 | /* |
125 | * Read in the allocation group header to initialise the per-ag data | |
126 | * in the mount structure | |
127 | */ | |
128 | int | |
129 | xfs_ialloc_pagi_init( | |
130 | struct xfs_mount *mp, /* file system mount structure */ | |
131 | struct xfs_trans *tp, /* transaction pointer */ | |
132 | xfs_agnumber_t agno); /* allocation group number */ | |
133 | ||
b194c7d8 | 134 | /* |
56b2de80 | 135 | * Lookup a record by ino in the btree given by cur. |
b194c7d8 | 136 | */ |
56b2de80 DC |
137 | int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino, |
138 | xfs_lookup_t dir, int *stat); | |
b194c7d8 BN |
139 | |
140 | /* | |
141 | * Get the data from the pointed-to record. | |
142 | */ | |
a2ceac1f | 143 | int xfs_inobt_get_rec(struct xfs_btree_cur *cur, |
56b2de80 | 144 | xfs_inobt_rec_incore_t *rec, int *stat); |
b194c7d8 | 145 | |
e9d35108 DC |
146 | /* |
147 | * Inode chunk initialisation routine | |
148 | */ | |
149 | int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp, | |
fe8d48ac | 150 | struct list_head *buffer_list, int icount, |
e9d35108 DC |
151 | xfs_agnumber_t agno, xfs_agblock_t agbno, |
152 | xfs_agblock_t length, unsigned int gen); | |
153 | ||
5a35bf2c DC |
154 | int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp, |
155 | xfs_agnumber_t agno, struct xfs_buf **bpp); | |
156 | ||
b5f6747c DW |
157 | union xfs_btree_rec; |
158 | void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, union xfs_btree_rec *rec, | |
159 | struct xfs_inobt_rec_incore *irec); | |
9deb7f65 DW |
160 | int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur, |
161 | xfs_agblock_t bno, xfs_extlen_t len, bool *exists); | |
162 | int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low, | |
163 | xfs_agino_t high, bool *exists); | |
164 | int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count, | |
165 | xfs_agino_t *freecount); | |
aa465192 DW |
166 | int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask, |
167 | uint8_t count, int32_t freecount, xfs_inofree_t free, | |
168 | int *stat); | |
b5f6747c DW |
169 | |
170 | int xfs_ialloc_cluster_alignment(struct xfs_mount *mp); | |
5a35bf2c | 171 | |
2bd0ea18 | 172 | #endif /* __XFS_IALLOC_H__ */ |