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 struct xfs_icreate_args; 37 38 /* 39 * Allocate an inode on disk. Mode is used to tell whether the new inode will 40 * need space, and whether it is a directory. 41 */ 42 int xfs_dialloc(struct xfs_trans **tpp, const struct xfs_icreate_args *args, 43 xfs_ino_t *new_ino); 44 45 int 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 */ 51 int 52 xfs_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 */ 62 void 63 xfs_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 68 int xfs_read_agi(struct xfs_perag *pag, struct xfs_trans *tp, xfs_buf_flags_t flags, 69 struct xfs_buf **agibpp); 70 int 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 */ 77 int 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 */ 83 int xfs_inobt_get_rec(struct xfs_btree_cur *cur, 84 xfs_inobt_rec_incore_t *rec, int *stat); 85 uint8_t xfs_inobt_rec_freecount(const struct xfs_inobt_rec_incore *irec); 86 87 /* 88 * Inode chunk initialisation routine 89 */ 90 int 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 96 union xfs_btree_rec; 97 void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, 98 const union xfs_btree_rec *rec, 99 struct xfs_inobt_rec_incore *irec); 100 xfs_failaddr_t xfs_inobt_check_irec(struct xfs_perag *pag, 101 const struct xfs_inobt_rec_incore *irec); 102 int 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); 105 int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count, 106 xfs_agino_t *freecount); 107 int 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); 110 111 int xfs_ialloc_cluster_alignment(struct xfs_mount *mp); 112 void xfs_ialloc_setup_geometry(struct xfs_mount *mp); 113 xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit); 114 115 int 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