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65b3da37 | 1 | /* |
ad723875 | 2 | * Copyright (c) 2005-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
65b3da37 | 4 | * |
7b718769 NS |
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 | |
65b3da37 CH |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
65b3da37 | 13 | * |
7b718769 NS |
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 | |
65b3da37 CH |
17 | */ |
18 | #ifndef __XFS_AOPS_H__ | |
19 | #define __XFS_AOPS_H__ | |
20 | ||
65b3da37 CH |
21 | extern mempool_t *xfs_ioend_pool; |
22 | ||
a206c817 CH |
23 | /* |
24 | * Types of I/O for bmap clustering and I/O completion tracking. | |
25 | */ | |
26 | enum { | |
fbcc0256 | 27 | XFS_IO_INVALID, /* initial state */ |
0d882a36 AR |
28 | XFS_IO_DELALLOC, /* covers delalloc region */ |
29 | XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */ | |
30 | XFS_IO_OVERWRITE, /* covers already allocated extent */ | |
a206c817 CH |
31 | }; |
32 | ||
33 | #define XFS_IO_TYPES \ | |
fbcc0256 | 34 | { XFS_IO_INVALID, "invalid" }, \ |
0d882a36 AR |
35 | { XFS_IO_DELALLOC, "delalloc" }, \ |
36 | { XFS_IO_UNWRITTEN, "unwritten" }, \ | |
37 | { XFS_IO_OVERWRITE, "overwrite" } | |
a206c817 | 38 | |
f6d6d4fc CH |
39 | /* |
40 | * xfs_ioend struct manages large extent writes for XFS. | |
41 | * It can manage several multi-page bio's at once. | |
42 | */ | |
65b3da37 | 43 | typedef struct xfs_ioend { |
e10de372 | 44 | struct list_head io_list; /* next ioend in chain */ |
f6d6d4fc | 45 | unsigned int io_type; /* delalloc / unwritten */ |
7d04a335 | 46 | int io_error; /* I/O error code */ |
65b3da37 | 47 | atomic_t io_remaining; /* hold count */ |
b677c210 | 48 | struct inode *io_inode; /* file being written to */ |
c1a073bd | 49 | struct buffer_head *io_buffer_head;/* buffer linked list head */ |
f6d6d4fc | 50 | struct buffer_head *io_buffer_tail;/* buffer linked list tail */ |
65b3da37 CH |
51 | size_t io_size; /* size of the extent */ |
52 | xfs_off_t io_offset; /* offset in the file */ | |
53 | struct work_struct io_work; /* xfsdatad work queue */ | |
281627df | 54 | struct xfs_trans *io_append_trans;/* xact. for size update */ |
65b3da37 CH |
55 | } xfs_ioend_t; |
56 | ||
f5e54d6e | 57 | extern const struct address_space_operations xfs_address_space_operations; |
6b698ede DC |
58 | |
59 | int xfs_get_blocks(struct inode *inode, sector_t offset, | |
60 | struct buffer_head *map_bh, int create); | |
61 | int xfs_get_blocks_direct(struct inode *inode, sector_t offset, | |
62 | struct buffer_head *map_bh, int create); | |
3e12dbbd DC |
63 | int xfs_get_blocks_dax_fault(struct inode *inode, sector_t offset, |
64 | struct buffer_head *map_bh, int create); | |
f6d6d4fc | 65 | |
20cb52eb | 66 | extern void xfs_count_page_state(struct page *, int *, int *); |
20a90f58 | 67 | extern struct block_device *xfs_find_bdev_for_inode(struct inode *); |
0b1b213f | 68 | |
ad723875 | 69 | #endif /* __XFS_AOPS_H__ */ |