| /* |
| * Copyright (c) 2000,2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #ifndef __XFS_IALLOC_H__ |
| #define __XFS_IALLOC_H__ |
| |
| struct xfs_buf; |
| struct xfs_dinode; |
| struct xfs_imap; |
| struct xfs_mount; |
| struct xfs_trans; |
| struct xfs_btree_cur; |
| |
| /* |
| * Allocation parameters for inode allocation. |
| */ |
| #define XFS_IALLOC_BLOCKS(mp) (mp)->m_ialloc_blks |
| |
| /* Move inodes in clusters of this size */ |
| #define XFS_INODE_BIG_CLUSTER_SIZE 8192 |
| |
| /* |
| * Make an inode pointer out of the buffer/offset. |
| */ |
| static inline struct xfs_dinode * |
| xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o) |
| { |
| return (struct xfs_dinode *) |
| (xfs_buf_offset(b, o << (mp)->m_sb.sb_inodelog)); |
| } |
| |
| /* |
| * Allocate an inode on disk. |
| * Mode is used to tell whether the new inode will need space, and whether |
| * it is a directory. |
| * |
| * To work within the constraint of one allocation per transaction, |
| * xfs_dialloc() is designed to be called twice if it has to do an |
| * allocation to make more free inodes. If an inode is |
| * available without an allocation, agbp would be set to the current |
| * agbp and alloc_done set to false. |
| * If an allocation needed to be done, agbp would be set to the |
| * inode header of the allocation group and alloc_done set to true. |
| * The caller should then commit the current transaction and allocate a new |
| * transaction. xfs_dialloc() should then be called again with |
| * the agbp value returned from the previous call. |
| * |
| * Once we successfully pick an inode its number is returned and the |
| * on-disk data structures are updated. The inode itself is not read |
| * in, since doing so would break ordering constraints with xfs_reclaim. |
| * |
| * *agbp should be set to NULL on the first call, *alloc_done set to FALSE. |
| */ |
| int /* error */ |
| xfs_dialloc( |
| struct xfs_trans *tp, /* transaction pointer */ |
| xfs_ino_t parent, /* parent inode (directory) */ |
| umode_t mode, /* mode bits for new inode */ |
| int okalloc, /* ok to allocate more space */ |
| struct xfs_buf **agbp, /* buf for a.g. inode header */ |
| xfs_ino_t *inop); /* inode number allocated */ |
| |
| /* |
| * Free disk inode. Carefully avoids touching the incore inode, all |
| * manipulations incore are the caller's responsibility. |
| * The on-disk inode is not changed by this operation, only the |
| * btree (free inode mask) is changed. |
| */ |
| int /* error */ |
| xfs_difree( |
| struct xfs_trans *tp, /* transaction pointer */ |
| xfs_ino_t inode, /* inode to be freed */ |
| struct xfs_bmap_free *flist, /* extents to free */ |
| int *delete, /* set if inode cluster was deleted */ |
| xfs_ino_t *first_ino); /* first inode in deleted cluster */ |
| |
| /* |
| * Return the location of the inode in imap, for mapping it into a buffer. |
| */ |
| int |
| xfs_imap( |
| struct xfs_mount *mp, /* file system mount structure */ |
| struct xfs_trans *tp, /* transaction pointer */ |
| xfs_ino_t ino, /* inode to locate */ |
| struct xfs_imap *imap, /* location map structure */ |
| uint flags); /* flags for inode btree lookup */ |
| |
| /* |
| * Compute and fill in value of m_in_maxlevels. |
| */ |
| void |
| xfs_ialloc_compute_maxlevels( |
| struct xfs_mount *mp); /* file system mount structure */ |
| |
| /* |
| * Log specified fields for the ag hdr (inode section) |
| */ |
| void |
| xfs_ialloc_log_agi( |
| struct xfs_trans *tp, /* transaction pointer */ |
| struct xfs_buf *bp, /* allocation group header buffer */ |
| int fields); /* bitmask of fields to log */ |
| |
| /* |
| * Read in the allocation group header (inode allocation section) |
| */ |
| int /* error */ |
| xfs_ialloc_read_agi( |
| struct xfs_mount *mp, /* file system mount structure */ |
| struct xfs_trans *tp, /* transaction pointer */ |
| xfs_agnumber_t agno, /* allocation group number */ |
| struct xfs_buf **bpp); /* allocation group hdr buf */ |
| |
| /* |
| * Read in the allocation group header to initialise the per-ag data |
| * in the mount structure |
| */ |
| int |
| xfs_ialloc_pagi_init( |
| struct xfs_mount *mp, /* file system mount structure */ |
| struct xfs_trans *tp, /* transaction pointer */ |
| xfs_agnumber_t agno); /* allocation group number */ |
| |
| /* |
| * Lookup a record by ino in the btree given by cur. |
| */ |
| int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino, |
| xfs_lookup_t dir, int *stat); |
| |
| /* |
| * Get the data from the pointed-to record. |
| */ |
| int xfs_inobt_get_rec(struct xfs_btree_cur *cur, |
| xfs_inobt_rec_incore_t *rec, int *stat); |
| |
| /* |
| * Inode chunk initialisation routine |
| */ |
| int xfs_ialloc_inode_init(struct xfs_mount *mp, struct xfs_trans *tp, |
| struct list_head *buffer_list, |
| xfs_agnumber_t agno, xfs_agblock_t agbno, |
| xfs_agblock_t length, unsigned int gen); |
| |
| #endif /* __XFS_IALLOC_H__ */ |