154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_IALLOC_H__
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#define __XFS_IALLOC_H__
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struct xfs_buf;
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struct xfs_dinode;
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struct xfs_imap;
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struct xfs_mount;
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struct xfs_trans;
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struct xfs_btree_cur;
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/* Move inodes in clusters of this size */
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#define XFS_INODE_BIG_CLUSTER_SIZE 8192
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struct xfs_icluster {
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bool deleted; /* record is deleted */
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xfs_ino_t first_ino; /* first inode number */
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uint64_t alloc; /* inode phys. allocation bitmap for
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* sparse chunks */
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};
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/*
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* Make an inode pointer out of the buffer/offset.
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*/
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static inline struct xfs_dinode *
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xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o)
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{
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return xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog);
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}
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/*
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* Allocate an inode on disk.
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* Mode is used to tell whether the new inode will need space, and whether
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* it is a directory.
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*
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* There are two phases to inode allocation: selecting an AG and ensuring
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* that it contains free inodes, followed by allocating one of the free
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* inodes. xfs_dialloc_select_ag() does the former and returns a locked AGI
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* to the caller, ensuring that followup call to xfs_dialloc_ag() will
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* have free inodes to allocate from. xfs_dialloc_ag() will return the inode
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* number of the free inode we allocated.
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*/
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int /* error */
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xfs_dialloc_select_ag(
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struct xfs_trans **tpp, /* double pointer of transaction */
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xfs_ino_t parent, /* parent inode (directory) */
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umode_t mode, /* mode bits for new inode */
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struct xfs_buf **IO_agbp);
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int
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xfs_dialloc_ag(
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struct xfs_trans *tp,
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struct xfs_buf *agbp,
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xfs_ino_t parent,
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xfs_ino_t *inop);
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/*
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* Free disk inode. Carefully avoids touching the incore inode, all
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* manipulations incore are the caller's responsibility.
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* The on-disk inode is not changed by this operation, only the
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* btree (free inode mask) is changed.
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*/
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int /* error */
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xfs_difree(
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struct xfs_trans *tp, /* transaction pointer */
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xfs_ino_t inode, /* inode to be freed */
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struct xfs_icluster *ifree); /* cluster info if deleted */
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/*
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* Return the location of the inode in imap, for mapping it into a buffer.
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*/
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int
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xfs_imap(
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struct xfs_mount *mp, /* file system mount structure */
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struct xfs_trans *tp, /* transaction pointer */
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xfs_ino_t ino, /* inode to locate */
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struct xfs_imap *imap, /* location map structure */
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uint flags); /* flags for inode btree lookup */
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/*
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* Log specified fields for the ag hdr (inode section)
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*/
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void
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xfs_ialloc_log_agi(
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struct xfs_trans *tp, /* transaction pointer */
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struct xfs_buf *bp, /* allocation group header buffer */
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int fields); /* bitmask of fields to log */
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/*
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* Read in the allocation group header (inode allocation section)
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*/
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int /* error */
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xfs_ialloc_read_agi(
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struct xfs_mount *mp, /* file system mount structure */
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struct xfs_trans *tp, /* transaction pointer */
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xfs_agnumber_t agno, /* allocation group number */
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struct xfs_buf **bpp); /* allocation group hdr buf */
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/*
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* Read in the allocation group header to initialise the per-ag data
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* in the mount structure
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*/
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int
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xfs_ialloc_pagi_init(
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struct xfs_mount *mp, /* file system mount structure */
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struct xfs_trans *tp, /* transaction pointer */
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xfs_agnumber_t agno); /* allocation group number */
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/*
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* Lookup a record by ino in the btree given by cur.
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*/
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int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
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xfs_lookup_t dir, int *stat);
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/*
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* Get the data from the pointed-to record.
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*/
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int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
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xfs_inobt_rec_incore_t *rec, int *stat);
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/*
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* Inode chunk initialisation routine
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*/
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int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp,
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struct list_head *buffer_list, int icount,
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xfs_agnumber_t agno, xfs_agblock_t agbno,
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xfs_agblock_t length, unsigned int gen);
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int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_agnumber_t agno, struct xfs_buf **bpp);
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union xfs_btree_rec;
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void xfs_inobt_btrec_to_irec(struct xfs_mount *mp, union xfs_btree_rec *rec,
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struct xfs_inobt_rec_incore *irec);
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int xfs_ialloc_has_inodes_at_extent(struct xfs_btree_cur *cur,
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xfs_agblock_t bno, xfs_extlen_t len, bool *exists);
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int xfs_ialloc_has_inode_record(struct xfs_btree_cur *cur, xfs_agino_t low,
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xfs_agino_t high, bool *exists);
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int xfs_ialloc_count_inodes(struct xfs_btree_cur *cur, xfs_agino_t *count,
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xfs_agino_t *freecount);
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int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
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uint8_t count, int32_t freecount, xfs_inofree_t free,
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int *stat);
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int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
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void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
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xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);
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#endif /* __XFS_IALLOC_H__ */
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