diff options
Diffstat (limited to 'fs/xfs/xfs_buf_mem.h')
| -rw-r--r-- | fs/xfs/xfs_buf_mem.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/fs/xfs/xfs_buf_mem.h b/fs/xfs/xfs_buf_mem.h new file mode 100644 index 0000000000..eed4a7b632 --- /dev/null +++ b/fs/xfs/xfs_buf_mem.h @@ -0,0 +1,34 @@ +// 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__ */ |