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ccd979bd MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public | |
17 | * License along with this program; if not, write to the | |
18 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | * Boston, MA 021110-1307, USA. | |
20 | */ | |
21 | ||
22 | #ifndef OCFS2_AOPS_H | |
23 | #define OCFS2_AOPS_H | |
24 | ||
53013cba MF |
25 | int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page, |
26 | unsigned from, unsigned to); | |
ccd979bd | 27 | |
1fabe148 | 28 | handle_t *ocfs2_start_walk_page_trans(struct inode *inode, |
ccd979bd MF |
29 | struct page *page, |
30 | unsigned from, | |
31 | unsigned to); | |
32 | ||
60b11392 MF |
33 | int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, |
34 | struct inode *inode, unsigned int from, | |
35 | unsigned int to, int new); | |
36 | ||
37 | int walk_page_buffers( handle_t *handle, | |
38 | struct buffer_head *head, | |
39 | unsigned from, | |
40 | unsigned to, | |
41 | int *partial, | |
42 | int (*fn)( handle_t *handle, | |
43 | struct buffer_head *bh)); | |
44 | ||
9517bac6 MF |
45 | struct ocfs2_write_ctxt; |
46 | typedef int (ocfs2_page_writer)(struct inode *, struct ocfs2_write_ctxt *, | |
47 | u64 *, unsigned int *, unsigned int *); | |
48 | ||
49 | ssize_t ocfs2_buffered_write_cluster(struct file *file, loff_t pos, | |
50 | size_t count, ocfs2_page_writer *actor, | |
51 | void *priv); | |
52 | ||
53 | struct ocfs2_write_ctxt { | |
54 | size_t w_count; | |
55 | loff_t w_pos; | |
56 | u32 w_cpos; | |
57 | unsigned int w_finished_copy; | |
58 | ||
59 | /* This is true if page_size > cluster_size */ | |
60 | unsigned int w_large_pages; | |
61 | ||
62 | /* Filler callback and private data */ | |
63 | ocfs2_page_writer *w_write_data_page; | |
64 | void *w_private; | |
65 | ||
66 | /* Only valid for the filler callback */ | |
67 | struct page *w_this_page; | |
68 | unsigned int w_this_page_new; | |
69 | }; | |
70 | ||
71 | struct ocfs2_buffered_write_priv { | |
72 | char *b_src_buf; | |
73 | const struct iovec *b_cur_iov; /* Current iovec */ | |
74 | size_t b_cur_off; /* Offset in the | |
75 | * current iovec */ | |
76 | }; | |
77 | int ocfs2_map_and_write_user_data(struct inode *inode, | |
78 | struct ocfs2_write_ctxt *wc, | |
79 | u64 *p_blkno, | |
80 | unsigned int *ret_from, | |
81 | unsigned int *ret_to); | |
82 | ||
6af67d82 MF |
83 | struct ocfs2_splice_write_priv { |
84 | struct splice_desc *s_sd; | |
85 | struct pipe_buffer *s_buf; | |
86 | struct pipe_inode_info *s_pipe; | |
87 | /* Neither offset value is ever larger than one page */ | |
88 | unsigned int s_offset; | |
89 | unsigned int s_buf_offset; | |
90 | }; | |
91 | int ocfs2_map_and_write_splice_data(struct inode *inode, | |
92 | struct ocfs2_write_ctxt *wc, | |
93 | u64 *p_blkno, | |
94 | unsigned int *ret_from, | |
95 | unsigned int *ret_to); | |
96 | ||
ccd979bd MF |
97 | /* all ocfs2_dio_end_io()'s fault */ |
98 | #define ocfs2_iocb_is_rw_locked(iocb) \ | |
99 | test_bit(0, (unsigned long *)&iocb->private) | |
7cdfc3a1 MF |
100 | static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) |
101 | { | |
102 | set_bit(0, (unsigned long *)&iocb->private); | |
103 | if (level) | |
104 | set_bit(1, (unsigned long *)&iocb->private); | |
105 | else | |
106 | clear_bit(1, (unsigned long *)&iocb->private); | |
107 | } | |
ccd979bd MF |
108 | #define ocfs2_iocb_clear_rw_locked(iocb) \ |
109 | clear_bit(0, (unsigned long *)&iocb->private) | |
7cdfc3a1 MF |
110 | #define ocfs2_iocb_rw_locked_level(iocb) \ |
111 | test_bit(1, (unsigned long *)&iocb->private) | |
ccd979bd | 112 | #endif /* OCFS2_FILE_H */ |