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1 | /* | |
2 | * Copyright (c) 2005-2006 Silicon Graphics, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it would be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | #ifndef __XFS_AOPS_H__ | |
19 | #define __XFS_AOPS_H__ | |
20 | ||
21 | extern mempool_t *xfs_ioend_pool; | |
22 | ||
23 | /* | |
24 | * Types of I/O for bmap clustering and I/O completion tracking. | |
25 | */ | |
26 | enum { | |
27 | XFS_IO_DELALLOC, /* covers delalloc region */ | |
28 | XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */ | |
29 | XFS_IO_OVERWRITE, /* covers already allocated extent */ | |
30 | }; | |
31 | ||
32 | #define XFS_IO_TYPES \ | |
33 | { XFS_IO_DELALLOC, "delalloc" }, \ | |
34 | { XFS_IO_UNWRITTEN, "unwritten" }, \ | |
35 | { XFS_IO_OVERWRITE, "overwrite" } | |
36 | ||
37 | /* | |
38 | * xfs_ioend struct manages large extent writes for XFS. | |
39 | * It can manage several multi-page bio's at once. | |
40 | */ | |
41 | typedef struct xfs_ioend { | |
42 | struct xfs_ioend *io_list; /* next ioend in chain */ | |
43 | unsigned int io_type; /* delalloc / unwritten */ | |
44 | int io_error; /* I/O error code */ | |
45 | atomic_t io_remaining; /* hold count */ | |
46 | struct inode *io_inode; /* file being written to */ | |
47 | struct buffer_head *io_buffer_head;/* buffer linked list head */ | |
48 | struct buffer_head *io_buffer_tail;/* buffer linked list tail */ | |
49 | size_t io_size; /* size of the extent */ | |
50 | xfs_off_t io_offset; /* offset in the file */ | |
51 | struct work_struct io_work; /* xfsdatad work queue */ | |
52 | struct xfs_trans *io_append_trans;/* xact. for size update */ | |
53 | } xfs_ioend_t; | |
54 | ||
55 | extern const struct address_space_operations xfs_address_space_operations; | |
56 | ||
57 | int xfs_get_blocks(struct inode *inode, sector_t offset, | |
58 | struct buffer_head *map_bh, int create); | |
59 | int xfs_get_blocks_direct(struct inode *inode, sector_t offset, | |
60 | struct buffer_head *map_bh, int create); | |
61 | int xfs_get_blocks_dax_fault(struct inode *inode, sector_t offset, | |
62 | struct buffer_head *map_bh, int create); | |
63 | ||
64 | extern void xfs_count_page_state(struct page *, int *, int *); | |
65 | extern struct block_device *xfs_find_bdev_for_inode(struct inode *); | |
66 | ||
67 | #endif /* __XFS_AOPS_H__ */ |