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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /fs/xfs/libxfs/xfs_alloc_btree.h | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/xfs/libxfs/xfs_alloc_btree.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_alloc_btree.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc_btree.h b/fs/xfs/libxfs/xfs_alloc_btree.h new file mode 100644 index 000000000..c9305ebb6 --- /dev/null +++ b/fs/xfs/libxfs/xfs_alloc_btree.h @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2000,2005 Silicon Graphics, Inc. + * All Rights Reserved. + */ +#ifndef __XFS_ALLOC_BTREE_H__ +#define __XFS_ALLOC_BTREE_H__ + +/* + * Freespace on-disk structures + */ + +struct xfs_buf; +struct xfs_btree_cur; +struct xfs_mount; + +/* + * Btree block header size depends on a superblock flag. + */ +#define XFS_ALLOC_BLOCK_LEN(mp) \ + (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ + XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) + +/* + * Record, key, and pointer address macros for btree blocks. + * + * (note that some of these may appear unused, but they are used in userspace) + */ +#define XFS_ALLOC_REC_ADDR(mp, block, index) \ + ((xfs_alloc_rec_t *) \ + ((char *)(block) + \ + XFS_ALLOC_BLOCK_LEN(mp) + \ + (((index) - 1) * sizeof(xfs_alloc_rec_t)))) + +#define XFS_ALLOC_KEY_ADDR(mp, block, index) \ + ((xfs_alloc_key_t *) \ + ((char *)(block) + \ + XFS_ALLOC_BLOCK_LEN(mp) + \ + ((index) - 1) * sizeof(xfs_alloc_key_t))) + +#define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \ + ((xfs_alloc_ptr_t *) \ + ((char *)(block) + \ + XFS_ALLOC_BLOCK_LEN(mp) + \ + (maxrecs) * sizeof(xfs_alloc_key_t) + \ + ((index) - 1) * sizeof(xfs_alloc_ptr_t))) + +extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, + struct xfs_trans *, struct xfs_buf *, + xfs_agnumber_t, xfs_btnum_t); +extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); +extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp, + unsigned long long len); + +#endif /* __XFS_ALLOC_BTREE_H__ */ |