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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#ifndef __XFS_IALLOC_H__
#define __XFS_IALLOC_H__
struct xfs_buf;
struct xfs_dinode;
struct xfs_imap;
struct xfs_mount;
struct xfs_trans;
struct xfs_btree_cur;
/* Move inodes in clusters of this size */
#define XFS_INODE_BIG_CLUSTER_SIZE 8192
struct xfs_icluster {
bool deleted; /* record is deleted */
xfs_ino_t first_ino; /* first inode number */
uint64_t alloc; /* inode phys. allocation bitmap for
* sparse chunks */
};
/*
* Make an inode pointer out of the buffer/offset.
*/
static inline struct xfs_dinode *
xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o)
{
return xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog);
}
/*
* Allocate an inode on disk. Mode is used to tell whether the new inode will
* need space, and whether it is a directory.
*/
int xfs_dialloc(struct xfs_trans **tpp, xfs_ino_t parent, umode_t mode,
xfs_ino_t *new_ino);
int xfs_difree(struct xfs_trans *tp, struct xfs_perag *pag,
xfs_ino_t ino, struct xfs_icluster *ifree);
/*
* Return the location of the inode in imap, for mapping it into a buffer.
*/
int
xfs_imap(
struct xfs_mount *mp, /* file system mount structure */
struct xfs_trans *tp, /* transaction pointer */
xfs_ino_t ino, /* inode to locate */
struct xfs_imap *imap, /* location map structure */
uint flags); /* flags for inode btree lookup */
/*
* Log specified fields for the ag hdr (inode section)
*/
void
xfs_ialloc_log_agi(
struct xfs_trans *tp, /* transaction pointer */
struct xfs_buf *bp, /* allocation group header buffer */
int fields); /* bitmask of fields to log */
/*
* Read in the allocation group header (inode allocation section)
*/
int /* error */
xfs_ialloc_read_agi(
struct xfs_mount *mp, /* file system mount structure */
struct xfs_trans *tp, /* transaction pointer */
xfs_agnumber_t agno, /* allocation group number */
struct xfs_buf **bpp); /* allocation group hdr buf */
/*
* Read in the allocation group header to initialise the per-ag data
* in the mount structure
*/
int
xfs_ialloc_pagi_init(
struct xfs_mount *mp, /* file system mount structure */
struct xfs_trans *tp, /* transaction pointer */
xfs_agnumber_t agno); /* allocation group number */
/*
* Lookup a record by ino in the btree given by cur.
*/
int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
xfs_lookup_t dir, int *stat);
/*
* Get the data from the pointed-to record.
*/
int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
xfs_inobt_rec_incore_t *rec, int *stat);
/*
* Inode chunk initialisation routine
*/
int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
struct list_head *buffer_list, int icount,
xfs_agnumber_t agno, xfs_agblock_t agbno,
xfs_agblock_t length, unsigned int gen);
int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_agnumber_t agno, struct xfs_buf **bpp);
union xfs_btree_rec;
void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, union xfs_btree_rec *rec,
struct xfs_inobt_rec_incore *irec);
int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
xfs_agblock_t bno, xfs_extlen_t len, bool *exists);
int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low,
xfs_agino_t high, bool *exists);
int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
xfs_agino_t *freecount);
int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
uint8_t count, int32_t freecount, xfs_inofree_t free,
int *stat);
int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);
int xfs_ialloc_check_shrink(struct xfs_trans *tp, xfs_agnumber_t agno,
struct xfs_buf *agibp, xfs_agblock_t new_length);
#endif /* __XFS_IALLOC_H__ */
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