1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright (c) 2000,2005 Silicon Graphics, Inc. |
4 | * All Rights Reserved. |
5 | */ |
6 | #ifndef __XFS_IALLOC_H__ |
7 | #define __XFS_IALLOC_H__ |
8 | |
9 | struct xfs_buf; |
10 | struct xfs_dinode; |
11 | struct xfs_imap; |
12 | struct xfs_mount; |
13 | struct xfs_trans; |
14 | struct xfs_btree_cur; |
15 | struct xfs_perag; |
16 | |
17 | /* Move inodes in clusters of this size */ |
18 | #define XFS_INODE_BIG_CLUSTER_SIZE 8192 |
19 | |
20 | struct xfs_icluster { |
21 | bool deleted; /* record is deleted */ |
22 | xfs_ino_t first_ino; /* first inode number */ |
23 | uint64_t alloc; /* inode phys. allocation bitmap for |
24 | * sparse chunks */ |
25 | }; |
26 | |
27 | /* |
28 | * Make an inode pointer out of the buffer/offset. |
29 | */ |
30 | static inline struct xfs_dinode * |
31 | xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o) |
32 | { |
33 | return xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog); |
34 | } |
35 | |
36 | /* |
37 | * Allocate an inode on disk. Mode is used to tell whether the new inode will |
38 | * need space, and whether it is a directory. |
39 | */ |
40 | int xfs_dialloc(struct xfs_trans **tpp, xfs_ino_t parent, umode_t mode, |
41 | xfs_ino_t *new_ino); |
42 | |
43 | int xfs_difree(struct xfs_trans *tp, struct xfs_perag *pag, |
44 | xfs_ino_t ino, struct xfs_icluster *ifree); |
45 | |
46 | /* |
47 | * Return the location of the inode in imap, for mapping it into a buffer. |
48 | */ |
49 | int |
50 | xfs_imap( |
51 | struct xfs_perag *pag, |
52 | struct xfs_trans *tp, /* transaction pointer */ |
53 | xfs_ino_t ino, /* inode to locate */ |
54 | struct xfs_imap *imap, /* location map structure */ |
55 | uint flags); /* flags for inode btree lookup */ |
56 | |
57 | /* |
58 | * Log specified fields for the ag hdr (inode section) |
59 | */ |
60 | void |
61 | xfs_ialloc_log_agi( |
62 | struct xfs_trans *tp, /* transaction pointer */ |
63 | struct xfs_buf *bp, /* allocation group header buffer */ |
64 | uint32_t fields); /* bitmask of fields to log */ |
65 | |
66 | int xfs_read_agi(struct xfs_perag *pag, struct xfs_trans *tp, |
67 | struct xfs_buf **agibpp); |
68 | int xfs_ialloc_read_agi(struct xfs_perag *pag, struct xfs_trans *tp, |
69 | struct xfs_buf **agibpp); |
70 | |
71 | /* |
72 | * Lookup a record by ino in the btree given by cur. |
73 | */ |
74 | int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino, |
75 | xfs_lookup_t dir, int *stat); |
76 | |
77 | /* |
78 | * Get the data from the pointed-to record. |
79 | */ |
80 | int xfs_inobt_get_rec(struct xfs_btree_cur *cur, |
81 | xfs_inobt_rec_incore_t *rec, int *stat); |
82 | uint8_t xfs_inobt_rec_freecount(const struct xfs_inobt_rec_incore *irec); |
83 | |
84 | /* |
85 | * Inode chunk initialisation routine |
86 | */ |
87 | int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp, |
88 | struct list_head *buffer_list, int icount, |
89 | xfs_agnumber_t agno, xfs_agblock_t agbno, |
90 | xfs_agblock_t length, unsigned int gen); |
91 | |
92 | |
93 | union xfs_btree_rec; |
94 | void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, |
95 | const union xfs_btree_rec *rec, |
96 | struct xfs_inobt_rec_incore *irec); |
97 | xfs_failaddr_t xfs_inobt_check_irec(struct xfs_perag *pag, |
98 | const struct xfs_inobt_rec_incore *irec); |
99 | int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur, |
100 | xfs_agblock_t bno, xfs_extlen_t len, |
101 | enum xbtree_recpacking *outcome); |
102 | int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count, |
103 | xfs_agino_t *freecount); |
104 | int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask, |
105 | uint8_t count, int32_t freecount, xfs_inofree_t free, |
106 | int *stat); |
107 | |
108 | int xfs_ialloc_cluster_alignment(struct xfs_mount *mp); |
109 | void xfs_ialloc_setup_geometry(struct xfs_mount *mp); |
110 | xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit); |
111 | |
112 | int xfs_ialloc_check_shrink(struct xfs_perag *pag, struct xfs_trans *tp, |
113 | struct xfs_buf *agibp, xfs_agblock_t new_length); |
114 | |
115 | #endif /* __XFS_IALLOC_H__ */ |
116 | |