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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
36struct xfs_icreate_args;
37
38/*
39 * Allocate an inode on disk. Mode is used to tell whether the new inode will
40 * need space, and whether it is a directory.
41 */
42int xfs_dialloc(struct xfs_trans **tpp, const struct xfs_icreate_args *args,
43 xfs_ino_t *new_ino);
44
45int xfs_difree(struct xfs_trans *tp, struct xfs_perag *pag,
46 xfs_ino_t ino, struct xfs_icluster *ifree);
47
48/*
49 * Return the location of the inode in imap, for mapping it into a buffer.
50 */
51int
52xfs_imap(
53 struct xfs_perag *pag,
54 struct xfs_trans *tp, /* transaction pointer */
55 xfs_ino_t ino, /* inode to locate */
56 struct xfs_imap *imap, /* location map structure */
57 uint flags); /* flags for inode btree lookup */
58
59/*
60 * Log specified fields for the ag hdr (inode section)
61 */
62void
63xfs_ialloc_log_agi(
64 struct xfs_trans *tp, /* transaction pointer */
65 struct xfs_buf *bp, /* allocation group header buffer */
66 uint32_t fields); /* bitmask of fields to log */
67
68int xfs_read_agi(struct xfs_perag *pag, struct xfs_trans *tp, xfs_buf_flags_t flags,
69 struct xfs_buf **agibpp);
70int xfs_ialloc_read_agi(struct xfs_perag *pag, struct xfs_trans *tp,
71 int flags, struct xfs_buf **agibpp);
72#define XFS_IALLOC_FLAG_TRYLOCK (1U << 0) /* use trylock for buffer locking */
73
74/*
75 * Lookup a record by ino in the btree given by cur.
76 */
77int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
78 xfs_lookup_t dir, int *stat);
79
80/*
81 * Get the data from the pointed-to record.
82 */
83int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
84 xfs_inobt_rec_incore_t *rec, int *stat);
85uint8_t xfs_inobt_rec_freecount(const struct xfs_inobt_rec_incore *irec);
86
87/*
88 * Inode chunk initialisation routine
89 */
90int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
91 struct list_head *buffer_list, int icount,
92 xfs_agnumber_t agno, xfs_agblock_t agbno,
93 xfs_agblock_t length, unsigned int gen);
94
95
96union xfs_btree_rec;
97void xfs_inobt_btrec_to_irec(struct xfs_mount *mp,
98 const union xfs_btree_rec *rec,
99 struct xfs_inobt_rec_incore *irec);
100xfs_failaddr_t xfs_inobt_check_irec(struct xfs_perag *pag,
101 const struct xfs_inobt_rec_incore *irec);
102int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
103 xfs_agblock_t bno, xfs_extlen_t len,
104 enum xbtree_recpacking *outcome);
105int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
106 xfs_agino_t *freecount);
107int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
108 uint8_t count, int32_t freecount, xfs_inofree_t free,
109 int *stat);
110
111int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
112void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
113xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);
114
115int xfs_ialloc_check_shrink(struct xfs_perag *pag, struct xfs_trans *tp,
116 struct xfs_buf *agibp, xfs_agblock_t new_length);
117
118#endif /* __XFS_IALLOC_H__ */
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;
15
16/* Move inodes in clusters of this size */
17#define XFS_INODE_BIG_CLUSTER_SIZE 8192
18
19struct 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 */
29static inline struct xfs_dinode *
30xfs_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.
37 * Mode is used to tell whether the new inode will need space, and whether
38 * it is a directory.
39 *
40 * To work within the constraint of one allocation per transaction,
41 * xfs_dialloc() is designed to be called twice if it has to do an
42 * allocation to make more free inodes. If an inode is
43 * available without an allocation, agbp would be set to the current
44 * agbp and alloc_done set to false.
45 * If an allocation needed to be done, agbp would be set to the
46 * inode header of the allocation group and alloc_done set to true.
47 * The caller should then commit the current transaction and allocate a new
48 * transaction. xfs_dialloc() should then be called again with
49 * the agbp value returned from the previous call.
50 *
51 * Once we successfully pick an inode its number is returned and the
52 * on-disk data structures are updated. The inode itself is not read
53 * in, since doing so would break ordering constraints with xfs_reclaim.
54 *
55 * *agbp should be set to NULL on the first call, *alloc_done set to FALSE.
56 */
57int /* error */
58xfs_dialloc(
59 struct xfs_trans *tp, /* transaction pointer */
60 xfs_ino_t parent, /* parent inode (directory) */
61 umode_t mode, /* mode bits for new inode */
62 struct xfs_buf **agbp, /* buf for a.g. inode header */
63 xfs_ino_t *inop); /* inode number allocated */
64
65/*
66 * Free disk inode. Carefully avoids touching the incore inode, all
67 * manipulations incore are the caller's responsibility.
68 * The on-disk inode is not changed by this operation, only the
69 * btree (free inode mask) is changed.
70 */
71int /* error */
72xfs_difree(
73 struct xfs_trans *tp, /* transaction pointer */
74 xfs_ino_t inode, /* inode to be freed */
75 struct xfs_icluster *ifree); /* cluster info if deleted */
76
77/*
78 * Return the location of the inode in imap, for mapping it into a buffer.
79 */
80int
81xfs_imap(
82 struct xfs_mount *mp, /* file system mount structure */
83 struct xfs_trans *tp, /* transaction pointer */
84 xfs_ino_t ino, /* inode to locate */
85 struct xfs_imap *imap, /* location map structure */
86 uint flags); /* flags for inode btree lookup */
87
88/*
89 * Log specified fields for the ag hdr (inode section)
90 */
91void
92xfs_ialloc_log_agi(
93 struct xfs_trans *tp, /* transaction pointer */
94 struct xfs_buf *bp, /* allocation group header buffer */
95 int fields); /* bitmask of fields to log */
96
97/*
98 * Read in the allocation group header (inode allocation section)
99 */
100int /* error */
101xfs_ialloc_read_agi(
102 struct xfs_mount *mp, /* file system mount structure */
103 struct xfs_trans *tp, /* transaction pointer */
104 xfs_agnumber_t agno, /* allocation group number */
105 struct xfs_buf **bpp); /* allocation group hdr buf */
106
107/*
108 * Read in the allocation group header to initialise the per-ag data
109 * in the mount structure
110 */
111int
112xfs_ialloc_pagi_init(
113 struct xfs_mount *mp, /* file system mount structure */
114 struct xfs_trans *tp, /* transaction pointer */
115 xfs_agnumber_t agno); /* allocation group number */
116
117/*
118 * Lookup a record by ino in the btree given by cur.
119 */
120int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
121 xfs_lookup_t dir, int *stat);
122
123/*
124 * Get the data from the pointed-to record.
125 */
126int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
127 xfs_inobt_rec_incore_t *rec, int *stat);
128
129/*
130 * Inode chunk initialisation routine
131 */
132int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
133 struct list_head *buffer_list, int icount,
134 xfs_agnumber_t agno, xfs_agblock_t agbno,
135 xfs_agblock_t length, unsigned int gen);
136
137int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
138 xfs_agnumber_t agno, struct xfs_buf **bpp);
139
140union xfs_btree_rec;
141void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, union xfs_btree_rec *rec,
142 struct xfs_inobt_rec_incore *irec);
143int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
144 xfs_agblock_t bno, xfs_extlen_t len, bool *exists);
145int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low,
146 xfs_agino_t high, bool *exists);
147int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
148 xfs_agino_t *freecount);
149int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
150 uint8_t count, int32_t freecount, xfs_inofree_t free,
151 int *stat);
152
153int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
154void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
155xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);
156
157#endif /* __XFS_IALLOC_H__ */