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
9struct xfs_buf;
10struct xfs_dinode;
11struct xfs_imap;
12struct xfs_mount;
13struct xfs_trans;
14struct xfs_btree_cur;
15struct xfs_perag;
16
17/* Move inodes in clusters of this size */
18#define	XFS_INODE_BIG_CLUSTER_SIZE	8192
19
20struct 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 */
30static inline struct xfs_dinode *
31xfs_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 */
40int xfs_dialloc(struct xfs_trans **tpp, xfs_ino_t parent, umode_t mode,
41		xfs_ino_t *new_ino);
42
43int 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 */
49int
50xfs_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 */
60void
61xfs_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
66int xfs_read_agi(struct xfs_perag *pag, struct xfs_trans *tp,
67		struct xfs_buf **agibpp);
68int 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 */
74int 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 */
80int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
81		xfs_inobt_rec_incore_t *rec, int *stat);
82
83/*
84 * Inode chunk initialisation routine
85 */
86int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
87			  struct list_head *buffer_list, int icount,
88			  xfs_agnumber_t agno, xfs_agblock_t agbno,
89			  xfs_agblock_t length, unsigned int gen);
90
91
92union xfs_btree_rec;
93void xfs_inobt_btrec_to_irec(struct xfs_mount *mp,
94		const union xfs_btree_rec *rec,
95		struct xfs_inobt_rec_incore *irec);
96xfs_failaddr_t xfs_inobt_check_irec(struct xfs_btree_cur *cur,
97		const struct xfs_inobt_rec_incore *irec);
98int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
99		xfs_agblock_t bno, xfs_extlen_t len,
100		enum xbtree_recpacking *outcome);
101int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
102		xfs_agino_t *freecount);
103int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
104		uint8_t count, int32_t freecount, xfs_inofree_t free,
105		int *stat);
106
107int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
108void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
109xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);
110
111int xfs_ialloc_check_shrink(struct xfs_perag *pag, struct xfs_trans *tp,
112		struct xfs_buf *agibp, xfs_agblock_t new_length);
113
114#endif	/* __XFS_IALLOC_H__ */
115