| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (c) 2005-2006 Silicon Graphics, Inc. |
| 4 | * All Rights Reserved. |
| 5 | */ |
| 6 | #ifndef __XFS_AOPS_H__ |
| 7 | #define __XFS_AOPS_H__ |
| 8 | |
| 9 | extern struct bio_set xfs_ioend_bioset; |
| 10 | |
| 11 | /* |
| 12 | * Types of I/O for bmap clustering and I/O completion tracking. |
| 13 | */ |
| 14 | enum { |
| 15 | XFS_IO_INVALID, /* initial state */ |
| 16 | XFS_IO_DELALLOC, /* covers delalloc region */ |
| 17 | XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */ |
| 18 | XFS_IO_OVERWRITE, /* covers already allocated extent */ |
| 19 | XFS_IO_COW, /* covers copy-on-write extent */ |
| 20 | XFS_IO_HOLE, /* covers region without any block allocation */ |
| 21 | }; |
| 22 | |
| 23 | #define XFS_IO_TYPES \ |
| 24 | { XFS_IO_INVALID, "invalid" }, \ |
| 25 | { XFS_IO_DELALLOC, "delalloc" }, \ |
| 26 | { XFS_IO_UNWRITTEN, "unwritten" }, \ |
| 27 | { XFS_IO_OVERWRITE, "overwrite" }, \ |
| 28 | { XFS_IO_COW, "CoW" }, \ |
| 29 | { XFS_IO_HOLE, "hole" } |
| 30 | |
| 31 | /* |
| 32 | * Structure for buffered I/O completions. |
| 33 | */ |
| 34 | struct xfs_ioend { |
| 35 | struct list_head io_list; /* next ioend in chain */ |
| 36 | unsigned int io_type; /* delalloc / unwritten */ |
| 37 | struct inode *io_inode; /* file being written to */ |
| 38 | size_t io_size; /* size of the extent */ |
| 39 | xfs_off_t io_offset; /* offset in the file */ |
| 40 | struct work_struct io_work; /* xfsdatad work queue */ |
| 41 | struct xfs_trans *io_append_trans;/* xact. for size update */ |
| 42 | struct bio *io_bio; /* bio being built */ |
| 43 | struct bio io_inline_bio; /* MUST BE LAST! */ |
| 44 | }; |
| 45 | |
| 46 | extern const struct address_space_operations xfs_address_space_operations; |
| 47 | extern const struct address_space_operations xfs_dax_aops; |
| 48 | |
| 49 | int xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size); |
| 50 | |
| 51 | extern void xfs_count_page_state(struct page *, int *, int *); |
| 52 | extern struct block_device *xfs_find_bdev_for_inode(struct inode *); |
| 53 | extern struct dax_device *xfs_find_daxdev_for_inode(struct inode *); |
| 54 | |
| 55 | #endif /* __XFS_AOPS_H__ */ |