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
27 * Make an inode pointer out of the buffer/offset.
29 static inline struct xfs_dinode *
30 xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o)
32 return xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog);
36 * Allocate an inode on disk.
37 * Mode is used to tell whether the new inode will need space, and whether
40 * There are two phases to inode allocation: selecting an AG and ensuring
41 * that it contains free inodes, followed by allocating one of the free
42 * inodes. xfs_dialloc_select_ag() does the former and returns a locked AGI
43 * to the caller, ensuring that followup call to xfs_dialloc_ag() will
44 * have free inodes to allocate from. xfs_dialloc_ag() will return the inode
45 * number of the free inode we allocated.
48 xfs_dialloc_select_ag(
49 struct xfs_trans **tpp, /* double pointer of transaction */
50 xfs_ino_t parent, /* parent inode (directory) */
51 umode_t mode, /* mode bits for new inode */
52 struct xfs_buf **IO_agbp);
62 * Free disk inode. Carefully avoids touching the incore inode, all
63 * manipulations incore are the caller's responsibility.
64 * The on-disk inode is not changed by this operation, only the
65 * btree (free inode mask) is changed.
69 struct xfs_trans *tp, /* transaction pointer */
70 xfs_ino_t inode, /* inode to be freed */
71 struct xfs_icluster *ifree); /* cluster info if deleted */
74 * Return the location of the inode in imap, for mapping it into a buffer.
78 struct xfs_mount *mp, /* file system mount structure */
79 struct xfs_trans *tp, /* transaction pointer */
80 xfs_ino_t ino, /* inode to locate */
81 struct xfs_imap *imap, /* location map structure */
82 uint flags); /* flags for inode btree lookup */
85 * Log specified fields for the ag hdr (inode section)
89 struct xfs_trans *tp, /* transaction pointer */
90 struct xfs_buf *bp, /* allocation group header buffer */
91 int fields); /* bitmask of fields to log */
94 * Read in the allocation group header (inode allocation section)
98 struct xfs_mount *mp, /* file system mount structure */
99 struct xfs_trans *tp, /* transaction pointer */
100 xfs_agnumber_t agno, /* allocation group number */
101 struct xfs_buf **bpp); /* allocation group hdr buf */
104 * Read in the allocation group header to initialise the per-ag data
105 * in the mount structure
108 xfs_ialloc_pagi_init(
109 struct xfs_mount *mp, /* file system mount structure */
110 struct xfs_trans *tp, /* transaction pointer */
111 xfs_agnumber_t agno); /* allocation group number */
114 * Lookup a record by ino in the btree given by cur.
116 int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
117 xfs_lookup_t dir, int *stat);
120 * Get the data from the pointed-to record.
122 int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
123 xfs_inobt_rec_incore_t *rec, int *stat);
126 * Inode chunk initialisation routine
128 int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
129 struct list_head *buffer_list, int icount,
130 xfs_agnumber_t agno, xfs_agblock_t agbno,
131 xfs_agblock_t length, unsigned int gen);
133 int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
134 xfs_agnumber_t agno, struct xfs_buf **bpp);
137 void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, union xfs_btree_rec *rec,
138 struct xfs_inobt_rec_incore *irec);
139 int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
140 xfs_agblock_t bno, xfs_extlen_t len, bool *exists);
141 int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low,
142 xfs_agino_t high, bool *exists);
143 int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
144 xfs_agino_t *freecount);
145 int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
146 uint8_t count, int32_t freecount, xfs_inofree_t free,
149 int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
150 void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
151 xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);
153 #endif /* __XFS_IALLOC_H__ */