LXR linux/fs/xfs/libxfs/xfs

   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
  65/*
  66 * Read in the allocation group header (inode allocation section)
  67 */
  68int                                     /* error */
  69xfs_ialloc_read_agi(
  70        struct xfs_mount *mp,           /* file system mount structure */
  71        struct xfs_trans *tp,           /* transaction pointer */
  72        xfs_agnumber_t  agno,           /* allocation group number */
  73        struct xfs_buf  **bpp);         /* allocation group hdr buf */
  74
  75/*
  76 * Read in the allocation group header to initialise the per-ag data
  77 * in the mount structure
  78 */
  79int
  80xfs_ialloc_pagi_init(
  81        struct xfs_mount *mp,           /* file system mount structure */
  82        struct xfs_trans *tp,           /* transaction pointer */
  83        xfs_agnumber_t  agno);          /* allocation group number */
  84
  85/*
  86 * Lookup a record by ino in the btree given by cur.
  87 */
  88int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
  89                xfs_lookup_t dir, int *stat);
  90
  91/*
  92 * Get the data from the pointed-to record.
  93 */
  94int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
  95                xfs_inobt_rec_incore_t *rec, int *stat);
  96
  97/*
  98 * Inode chunk initialisation routine
  99 */
 100int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
 101                          struct list_head *buffer_list, int icount,
 102                          xfs_agnumber_t agno, xfs_agblock_t agbno,
 103                          xfs_agblock_t length, unsigned int gen);
 104
 105int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
 106                xfs_agnumber_t agno, struct xfs_buf **bpp);
 107
 108union xfs_btree_rec;
 109void xfs_inobt_btrec_to_irec(struct xfs_mount *mp,
 110                const union xfs_btree_rec *rec,
 111                struct xfs_inobt_rec_incore *irec);
 112int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
 113                xfs_agblock_t bno, xfs_extlen_t len, bool *exists);
 114int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low,
 115                xfs_agino_t high, bool *exists);
 116int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
 117                xfs_agino_t *freecount);
 118int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
 119                uint8_t count, int32_t freecount, xfs_inofree_t free,
 120                int *stat);
 121
 122int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
 123void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
 124xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);
 125
 126int xfs_ialloc_check_shrink(struct xfs_trans *tp, xfs_agnumber_t agno,
 127                struct xfs_buf *agibp, xfs_agblock_t new_length);
 128
 129#endif  /* __XFS_IALLOC_H__ */
 130