1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
6 #ifndef __XFS_IALLOC_H__
7 #define __XFS_IALLOC_H__
16 /* Move inodes in clusters of this size */
17 #define XFS_INODE_BIG_CLUSTER_SIZE 8192
20 bool deleted; /* record is deleted */
21 xfs_ino_t first_ino; /* first inode number */
22 uint64_t alloc; /* inode phys. allocation bitmap for
26 /* Calculate and return the number of filesystem blocks per inode cluster */
28 xfs_icluster_size_fsb(
31 if (mp->m_sb.sb_blocksize >= mp->m_inode_cluster_size)
33 return mp->m_inode_cluster_size >> mp->m_sb.sb_blocklog;
37 * Make an inode pointer out of the buffer/offset.
39 static inline struct xfs_dinode *
40 xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o)
42 return xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog);
46 * Allocate an inode on disk.
47 * Mode is used to tell whether the new inode will need space, and whether
50 * To work within the constraint of one allocation per transaction,
51 * xfs_dialloc() is designed to be called twice if it has to do an
52 * allocation to make more free inodes. If an inode is
53 * available without an allocation, agbp would be set to the current
54 * agbp and alloc_done set to false.
55 * If an allocation needed to be done, agbp would be set to the
56 * inode header of the allocation group and alloc_done set to true.
57 * The caller should then commit the current transaction and allocate a new
58 * transaction. xfs_dialloc() should then be called again with
59 * the agbp value returned from the previous call.
61 * Once we successfully pick an inode its number is returned and the
62 * on-disk data structures are updated. The inode itself is not read
63 * in, since doing so would break ordering constraints with xfs_reclaim.
65 * *agbp should be set to NULL on the first call, *alloc_done set to FALSE.
69 struct xfs_trans *tp, /* transaction pointer */
70 xfs_ino_t parent, /* parent inode (directory) */
71 umode_t mode, /* mode bits for new inode */
72 struct xfs_buf **agbp, /* buf for a.g. inode header */
73 xfs_ino_t *inop); /* inode number allocated */
76 * Free disk inode. Carefully avoids touching the incore inode, all
77 * manipulations incore are the caller's responsibility.
78 * The on-disk inode is not changed by this operation, only the
79 * btree (free inode mask) is changed.
83 struct xfs_trans *tp, /* transaction pointer */
84 xfs_ino_t inode, /* inode to be freed */
85 struct xfs_defer_ops *dfops, /* extents to free */
86 struct xfs_icluster *ifree); /* cluster info if deleted */
89 * Return the location of the inode in imap, for mapping it into a buffer.
93 struct xfs_mount *mp, /* file system mount structure */
94 struct xfs_trans *tp, /* transaction pointer */
95 xfs_ino_t ino, /* inode to locate */
96 struct xfs_imap *imap, /* location map structure */
97 uint flags); /* flags for inode btree lookup */
100 * Compute and fill in value of m_in_maxlevels.
103 xfs_ialloc_compute_maxlevels(
104 struct xfs_mount *mp); /* file system mount structure */
107 * Log specified fields for the ag hdr (inode section)
111 struct xfs_trans *tp, /* transaction pointer */
112 struct xfs_buf *bp, /* allocation group header buffer */
113 int fields); /* bitmask of fields to log */
116 * Read in the allocation group header (inode allocation section)
120 struct xfs_mount *mp, /* file system mount structure */
121 struct xfs_trans *tp, /* transaction pointer */
122 xfs_agnumber_t agno, /* allocation group number */
123 struct xfs_buf **bpp); /* allocation group hdr buf */
126 * Read in the allocation group header to initialise the per-ag data
127 * in the mount structure
130 xfs_ialloc_pagi_init(
131 struct xfs_mount *mp, /* file system mount structure */
132 struct xfs_trans *tp, /* transaction pointer */
133 xfs_agnumber_t agno); /* allocation group number */
136 * Lookup a record by ino in the btree given by cur.
138 int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
139 xfs_lookup_t dir, int *stat);
142 * Get the data from the pointed-to record.
144 int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
145 xfs_inobt_rec_incore_t *rec, int *stat);
148 * Inode chunk initialisation routine
150 int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
151 struct list_head *buffer_list, int icount,
152 xfs_agnumber_t agno, xfs_agblock_t agbno,
153 xfs_agblock_t length, unsigned int gen);
155 int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
156 xfs_agnumber_t agno, struct xfs_buf **bpp);
159 void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, union xfs_btree_rec *rec,
160 struct xfs_inobt_rec_incore *irec);
161 int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
162 xfs_agblock_t bno, xfs_extlen_t len, bool *exists);
163 int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low,
164 xfs_agino_t high, bool *exists);
165 int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
166 xfs_agino_t *freecount);
167 int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
168 uint8_t count, int32_t freecount, xfs_inofree_t free,
171 int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
172 void xfs_ialloc_agino_range(struct xfs_mount *mp, xfs_agnumber_t agno,
173 xfs_agino_t *first, xfs_agino_t *last);
174 bool xfs_verify_agino(struct xfs_mount *mp, xfs_agnumber_t agno,
176 bool xfs_verify_ino(struct xfs_mount *mp, xfs_ino_t ino);
177 bool xfs_internal_inum(struct xfs_mount *mp, xfs_ino_t ino);
178 bool xfs_verify_dir_ino(struct xfs_mount *mp, xfs_ino_t ino);
180 #endif /* __XFS_IALLOC_H__ */