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__ */