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;
 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__ */