| // 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__ */ |
