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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Copyright (c) 2023-2024 Oracle. All Rights Reserved.
- * Author: Darrick J. Wong <djwong@kernel.org>
- */
- #ifndef __XFS_BUF_MEM_H__
- #define __XFS_BUF_MEM_H__
- #define XMBUF_BLOCKSIZE (PAGE_SIZE)
- #define XMBUF_BLOCKSHIFT (PAGE_SHIFT)
- #ifdef CONFIG_XFS_MEMORY_BUFS
- static inline bool xfs_buftarg_is_mem(const struct xfs_buftarg *btp)
- {
- return btp->bt_bdev == NULL;
- }
- int xmbuf_alloc(struct xfs_mount *mp, const char *descr,
- struct xfs_buftarg **btpp);
- void xmbuf_free(struct xfs_buftarg *btp);
- int xmbuf_map_page(struct xfs_buf *bp);
- void xmbuf_unmap_page(struct xfs_buf *bp);
- bool xmbuf_verify_daddr(struct xfs_buftarg *btp, xfs_daddr_t daddr);
- void xmbuf_trans_bdetach(struct xfs_trans *tp, struct xfs_buf *bp);
- int xmbuf_finalize(struct xfs_buf *bp);
- #else
- # define xfs_buftarg_is_mem(...) (false)
- # define xmbuf_map_page(...) (-ENOMEM)
- # define xmbuf_unmap_page(...) ((void)0)
- # define xmbuf_verify_daddr(...) (false)
- #endif /* CONFIG_XFS_MEMORY_BUFS */
- #endif /* __XFS_BUF_MEM_H__ */
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