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1/*
2 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#ifndef __XFS_IALLOC_H__
19#define __XFS_IALLOC_H__
20
21struct xfs_buf;
22struct xfs_dinode;
23struct xfs_imap;
24struct xfs_mount;
25struct xfs_trans;
26struct xfs_btree_cur;
27
28/* Move inodes in clusters of this size */
29#define XFS_INODE_BIG_CLUSTER_SIZE 8192
30
31struct xfs_icluster {
32 bool deleted; /* record is deleted */
33 xfs_ino_t first_ino; /* first inode number */
34 uint64_t alloc; /* inode phys. allocation bitmap for
35 * sparse chunks */
36};
37
38/* Calculate and return the number of filesystem blocks per inode cluster */
39static inline int
40xfs_icluster_size_fsb(
41 struct xfs_mount *mp)
42{
43 if (mp->m_sb.sb_blocksize >= mp->m_inode_cluster_size)
44 return 1;
45 return mp->m_inode_cluster_size >> mp->m_sb.sb_blocklog;
46}
47
48/*
49 * Make an inode pointer out of the buffer/offset.
50 */
51static inline struct xfs_dinode *
52xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o)
53{
54 return xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog);
55}
56
57/*
58 * Allocate an inode on disk.
59 * Mode is used to tell whether the new inode will need space, and whether
60 * it is a directory.
61 *
62 * To work within the constraint of one allocation per transaction,
63 * xfs_dialloc() is designed to be called twice if it has to do an
64 * allocation to make more free inodes. If an inode is
65 * available without an allocation, agbp would be set to the current
66 * agbp and alloc_done set to false.
67 * If an allocation needed to be done, agbp would be set to the
68 * inode header of the allocation group and alloc_done set to true.
69 * The caller should then commit the current transaction and allocate a new
70 * transaction. xfs_dialloc() should then be called again with
71 * the agbp value returned from the previous call.
72 *
73 * Once we successfully pick an inode its number is returned and the
74 * on-disk data structures are updated. The inode itself is not read
75 * in, since doing so would break ordering constraints with xfs_reclaim.
76 *
77 * *agbp should be set to NULL on the first call, *alloc_done set to FALSE.
78 */
79int /* error */
80xfs_dialloc(
81 struct xfs_trans *tp, /* transaction pointer */
82 xfs_ino_t parent, /* parent inode (directory) */
83 umode_t mode, /* mode bits for new inode */
84 int okalloc, /* ok to allocate more space */
85 struct xfs_buf **agbp, /* buf for a.g. inode header */
86 xfs_ino_t *inop); /* inode number allocated */
87
88/*
89 * Free disk inode. Carefully avoids touching the incore inode, all
90 * manipulations incore are the caller's responsibility.
91 * The on-disk inode is not changed by this operation, only the
92 * btree (free inode mask) is changed.
93 */
94int /* error */
95xfs_difree(
96 struct xfs_trans *tp, /* transaction pointer */
97 xfs_ino_t inode, /* inode to be freed */
98 struct xfs_defer_ops *dfops, /* extents to free */
99 struct xfs_icluster *ifree); /* cluster info if deleted */
100
101/*
102 * Return the location of the inode in imap, for mapping it into a buffer.
103 */
104int
105xfs_imap(
106 struct xfs_mount *mp, /* file system mount structure */
107 struct xfs_trans *tp, /* transaction pointer */
108 xfs_ino_t ino, /* inode to locate */
109 struct xfs_imap *imap, /* location map structure */
110 uint flags); /* flags for inode btree lookup */
111
112/*
113 * Compute and fill in value of m_in_maxlevels.
114 */
115void
116xfs_ialloc_compute_maxlevels(
117 struct xfs_mount *mp); /* file system mount structure */
118
119/*
120 * Log specified fields for the ag hdr (inode section)
121 */
122void
123xfs_ialloc_log_agi(
124 struct xfs_trans *tp, /* transaction pointer */
125 struct xfs_buf *bp, /* allocation group header buffer */
126 int fields); /* bitmask of fields to log */
127
128/*
129 * Read in the allocation group header (inode allocation section)
130 */
131int /* error */
132xfs_ialloc_read_agi(
133 struct xfs_mount *mp, /* file system mount structure */
134 struct xfs_trans *tp, /* transaction pointer */
135 xfs_agnumber_t agno, /* allocation group number */
136 struct xfs_buf **bpp); /* allocation group hdr buf */
137
138/*
139 * Read in the allocation group header to initialise the per-ag data
140 * in the mount structure
141 */
142int
143xfs_ialloc_pagi_init(
144 struct xfs_mount *mp, /* file system mount structure */
145 struct xfs_trans *tp, /* transaction pointer */
146 xfs_agnumber_t agno); /* allocation group number */
147
148/*
149 * Lookup a record by ino in the btree given by cur.
150 */
151int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
152 xfs_lookup_t dir, int *stat);
153
154/*
155 * Get the data from the pointed-to record.
156 */
157int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
158 xfs_inobt_rec_incore_t *rec, int *stat);
159
160/*
161 * Inode chunk initialisation routine
162 */
163int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
164 struct list_head *buffer_list, int icount,
165 xfs_agnumber_t agno, xfs_agblock_t agbno,
166 xfs_agblock_t length, unsigned int gen);
167
168int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
169 xfs_agnumber_t agno, struct xfs_buf **bpp);
170
171
172#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. Mode is used to tell whether the new inode will
37 * need space, and whether it is a directory.
38 */
39int xfs_dialloc(struct xfs_trans **tpp, xfs_ino_t parent, umode_t mode,
40 xfs_ino_t *new_ino);
41
42int 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 */
48int
49xfs_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 */
59void
60xfs_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
65int xfs_read_agi(struct xfs_perag *pag, struct xfs_trans *tp,
66 struct xfs_buf **agibpp);
67int 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 */
73int 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 */
79int 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 */
85int 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
91union xfs_btree_rec;
92void xfs_inobt_btrec_to_irec(struct xfs_mount *mp,
93 const union xfs_btree_rec *rec,
94 struct xfs_inobt_rec_incore *irec);
95int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
96 xfs_agblock_t bno, xfs_extlen_t len, bool *exists);
97int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low,
98 xfs_agino_t high, bool *exists);
99int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
100 xfs_agino_t *freecount);
101int 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
105int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
106void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
107xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);
108
109int 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__ */