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