diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap_btree.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap_btree.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap_btree.h b/fs/xfs/libxfs/xfs_bmap_btree.h new file mode 100644 index 000000000000..819a8a4dee95 --- /dev/null +++ b/fs/xfs/libxfs/xfs_bmap_btree.h @@ -0,0 +1,143 @@ +/* + * Copyright (c) 2000,2002-2005 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_BMAP_BTREE_H__ +#define __XFS_BMAP_BTREE_H__ + +struct xfs_btree_cur; +struct xfs_btree_block; +struct xfs_mount; +struct xfs_inode; +struct xfs_trans; + +/* + * Extent state and extent format macros. + */ +#define XFS_EXTFMT_INODE(x) \ + (xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \ + XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE) +#define ISUNWRITTEN(x) ((x)->br_state == XFS_EXT_UNWRITTEN) + +/* + * Btree block header size depends on a superblock flag. + */ +#define XFS_BMBT_BLOCK_LEN(mp) \ + (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ + XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN) + +#define XFS_BMBT_REC_ADDR(mp, block, index) \ + ((xfs_bmbt_rec_t *) \ + ((char *)(block) + \ + XFS_BMBT_BLOCK_LEN(mp) + \ + ((index) - 1) * sizeof(xfs_bmbt_rec_t))) + +#define XFS_BMBT_KEY_ADDR(mp, block, index) \ + ((xfs_bmbt_key_t *) \ + ((char *)(block) + \ + XFS_BMBT_BLOCK_LEN(mp) + \ + ((index) - 1) * sizeof(xfs_bmbt_key_t))) + +#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \ + ((xfs_bmbt_ptr_t *) \ + ((char *)(block) + \ + XFS_BMBT_BLOCK_LEN(mp) + \ + (maxrecs) * sizeof(xfs_bmbt_key_t) + \ + ((index) - 1) * sizeof(xfs_bmbt_ptr_t))) + +#define XFS_BMDR_REC_ADDR(block, index) \ + ((xfs_bmdr_rec_t *) \ + ((char *)(block) + \ + sizeof(struct xfs_bmdr_block) + \ + ((index) - 1) * sizeof(xfs_bmdr_rec_t))) + +#define XFS_BMDR_KEY_ADDR(block, index) \ + ((xfs_bmdr_key_t *) \ + ((char *)(block) + \ + sizeof(struct xfs_bmdr_block) + \ + ((index) - 1) * sizeof(xfs_bmdr_key_t))) + +#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \ + ((xfs_bmdr_ptr_t *) \ + ((char *)(block) + \ + sizeof(struct xfs_bmdr_block) + \ + (maxrecs) * sizeof(xfs_bmdr_key_t) + \ + ((index) - 1) * sizeof(xfs_bmdr_ptr_t))) + +/* + * These are to be used when we know the size of the block and + * we don't have a cursor. + */ +#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \ + XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0)) + +#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \ + (int)(XFS_BMBT_BLOCK_LEN(mp) + \ + ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) + +#define XFS_BMAP_BROOT_SPACE(mp, bb) \ + (XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs))) +#define XFS_BMDR_SPACE_CALC(nrecs) \ + (int)(sizeof(xfs_bmdr_block_t) + \ + ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) +#define XFS_BMAP_BMDR_SPACE(bb) \ + (XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs))) + +/* + * Maximum number of bmap btree levels. + */ +#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)]) + +/* + * Prototypes for xfs_bmap.c to call. + */ +extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int, + struct xfs_btree_block *, int); +extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); +extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r); +extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r); +extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r); +extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r); + +extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r); +extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r); + +extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); +extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o, + xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); +extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v); +extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v); +extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v); +extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v); + +extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o, + xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); + +extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int, + xfs_bmdr_block_t *, int); + +extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level); +extern int xfs_bmdr_maxrecs(int blocklen, int leaf); +extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf); + +extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip, + int whichfork, xfs_ino_t new_owner, + struct list_head *buffer_list); + +extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, + struct xfs_trans *, struct xfs_inode *, int); + +#endif /* __XFS_BMAP_BTREE_H__ */ |