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 9 struct xfs_buf; 10 struct xfs_dinode; 11 struct xfs_imap; 12 struct xfs_mount; 13 struct xfs_trans; 14 struct xfs_btree_cur; 15 16 /* Move inodes in clusters of this size */ 17 #define XFS_INODE_BIG_CLUSTER_SIZE 8192 18 19 struct 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 */ 29 static inline struct xfs_dinode * 30 xfs_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 */ 39 int xfs_dialloc(struct xfs_trans **tpp, xfs_ino_t parent, umode_t mode, 40 xfs_ino_t *new_ino); 41 42 int 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 */ 48 int 49 xfs_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 */ 59 void 60 xfs_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 */ 68 int /* error */ 69 xfs_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 */ 79 int 80 xfs_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 */ 88 int 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 */ 94 int 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 */ 100 int 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); 104 105 int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp, 106 xfs_agnumber_t agno, struct xfs_buf **bpp); 107 108 union xfs_btree_rec; 109 void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, 110 const union xfs_btree_rec *rec, 111 struct xfs_inobt_rec_incore *irec); 112 int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur, 113 xfs_agblock_t bno, xfs_extlen_t len, bool *exists); 114 int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low, 115 xfs_agino_t high, bool *exists); 116 int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count, 117 xfs_agino_t *freecount); 118 int 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); 121 122 int xfs_ialloc_cluster_alignment(struct xfs_mount *mp); 123 void xfs_ialloc_setup_geometry(struct xfs_mount *mp); 124 xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit); 125 126 int 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