| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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| 2 | /* |
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| 3 | * Copyright (c) 2023-2024 Oracle. All Rights Reserved. |
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| 4 | * Author: Darrick J. Wong <djwong@kernel.org> |
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| 5 | */ |
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| 6 | #ifndef __XFS_BUF_MEM_H__ |
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| 7 | #define __XFS_BUF_MEM_H__ |
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| 8 | |
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| 9 | #define XMBUF_BLOCKSIZE (PAGE_SIZE) |
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| 10 | #define XMBUF_BLOCKSHIFT (PAGE_SHIFT) |
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| 11 | |
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| 12 | #ifdef CONFIG_XFS_MEMORY_BUFS |
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| 13 | static inline bool xfs_buftarg_is_mem(const struct xfs_buftarg *btp) |
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| 14 | { |
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| 15 | return btp->bt_bdev == NULL; |
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| 16 | } |
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| 17 | |
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| 18 | int xmbuf_alloc(struct xfs_mount *mp, const char *descr, |
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| 19 | struct xfs_buftarg **btpp); |
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| 20 | void xmbuf_free(struct xfs_buftarg *btp); |
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| 21 | |
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| 22 | int xmbuf_map_page(struct xfs_buf *bp); |
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| 23 | void xmbuf_unmap_page(struct xfs_buf *bp); |
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| 24 | bool xmbuf_verify_daddr(struct xfs_buftarg *btp, xfs_daddr_t daddr); |
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| 25 | void xmbuf_trans_bdetach(struct xfs_trans *tp, struct xfs_buf *bp); |
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| 26 | int xmbuf_finalize(struct xfs_buf *bp); |
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| 27 | #else |
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| 28 | # define xfs_buftarg_is_mem(...) (false) |
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| 29 | # define xmbuf_map_page(...) (-ENOMEM) |
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| 30 | # define xmbuf_unmap_page(...) ((void)0) |
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| 31 | # define xmbuf_verify_daddr(...) (false) |
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| 32 | #endif /* CONFIG_XFS_MEMORY_BUFS */ |
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| 33 | |
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| 34 | #endif /* __XFS_BUF_MEM_H__ */ |
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| 35 | |
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