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 struct xfs_perag; 16 17 /* Move inodes in clusters of this size */ 18 #define XFS_INODE_BIG_CLUSTER_SIZE 8192 19 20 struct 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 */ 30 static inline struct xfs_dinode * 31 xfs_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 36 /* 37 * Allocate an inode on disk. Mode is used to tell whether the new inode will 38 * need space, and whether it is a directory. 39 */ 40 int xfs_dialloc(struct xfs_trans **tpp, xfs_ino_t parent, umode_t mode, 41 xfs_ino_t *new_ino); 42 43 int xfs_difree(struct xfs_trans *tp, struct xfs_perag *pag, 44 xfs_ino_t ino, struct xfs_icluster *ifree); 45 46 /* 47 * Return the location of the inode in imap, for mapping it into a buffer. 48 */ 49 int 50 xfs_imap( 51 struct xfs_perag *pag, 52 struct xfs_trans *tp, /* transaction pointer */ 53 xfs_ino_t ino, /* inode to locate */ 54 struct xfs_imap *imap, /* location map structure */ 55 uint flags); /* flags for inode btree lookup */ 56 57 /* 58 * Log specified fields for the ag hdr (inode section) 59 */ 60 void 61 xfs_ialloc_log_agi( 62 struct xfs_trans *tp, /* transaction pointer */ 63 struct xfs_buf *bp, /* allocation group header buffer */ 64 uint32_t fields); /* bitmask of fields to log */ 65 66 int xfs_read_agi(struct xfs_perag *pag, struct xfs_trans *tp, 67 struct xfs_buf **agibpp); 68 int xfs_ialloc_read_agi(struct xfs_perag *pag, struct xfs_trans *tp, 69 struct xfs_buf **agibpp); 70 71 /* 72 * Lookup a record by ino in the btree given by cur. 73 */ 74 int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino, 75 xfs_lookup_t dir, int *stat); 76 77 /* 78 * Get the data from the pointed-to record. 79 */ 80 int xfs_inobt_get_rec(struct xfs_btree_cur *cur, 81 xfs_inobt_rec_incore_t *rec, int *stat); 82 83 /* 84 * Inode chunk initialisation routine 85 */ 86 int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp, 87 struct list_head *buffer_list, int icount, 88 xfs_agnumber_t agno, xfs_agblock_t agbno, 89 xfs_agblock_t length, unsigned int gen); 90 91 92 union xfs_btree_rec; 93 void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, 94 const union xfs_btree_rec *rec, 95 struct xfs_inobt_rec_incore *irec); 96 int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur, 97 xfs_agblock_t bno, xfs_extlen_t len, bool *exists); 98 int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low, 99 xfs_agino_t high, bool *exists); 100 int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count, 101 xfs_agino_t *freecount); 102 int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask, 103 uint8_t count, int32_t freecount, xfs_inofree_t free, 104 int *stat); 105 106 int xfs_ialloc_cluster_alignment(struct xfs_mount *mp); 107 void xfs_ialloc_setup_geometry(struct xfs_mount *mp); 108 xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit); 109 110 int xfs_ialloc_check_shrink(struct xfs_perag *pag, struct xfs_trans *tp, 111 struct xfs_buf *agibp, xfs_agblock_t new_length); 112 113 #endif /* __XFS_IALLOC_H__ */ 114