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1// SPDX-License-Identifier: GPL-2.02/*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 819219 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 for24 * 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 will40 * 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 */51int52xfs_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 */62void63xfs_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 routine89 */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__ */119