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Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2023-2024 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <djwong@kernel.org>
5 */
6#ifndef __XFS_BUF_MEM_H__
7#define __XFS_BUF_MEM_H__
8
9#define XMBUF_BLOCKSIZE (PAGE_SIZE)
10#define XMBUF_BLOCKSHIFT (PAGE_SHIFT)
11
12#ifdef CONFIG_XFS_MEMORY_BUFS
13static inline bool xfs_buftarg_is_mem(const struct xfs_buftarg *btp)
14{
15 return btp->bt_bdev == NULL;
16}
17
18int xmbuf_alloc(struct xfs_mount *mp, const char *descr,
19 struct xfs_buftarg **btpp);
20void xmbuf_free(struct xfs_buftarg *btp);
21
22int xmbuf_map_page(struct xfs_buf *bp);
23void xmbuf_unmap_page(struct xfs_buf *bp);
24bool xmbuf_verify_daddr(struct xfs_buftarg *btp, xfs_daddr_t daddr);
25void xmbuf_trans_bdetach(struct xfs_trans *tp, struct xfs_buf *bp);
26int xmbuf_finalize(struct xfs_buf *bp);
27#else
28# define xfs_buftarg_is_mem(...) (false)
29# define xmbuf_map_page(...) (-ENOMEM)
30# define xmbuf_unmap_page(...) ((void)0)
31# define xmbuf_verify_daddr(...) (false)
32#endif /* CONFIG_XFS_MEMORY_BUFS */
33
34#endif /* __XFS_BUF_MEM_H__ */