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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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_BUFS13static 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#else28# 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__ */35