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8#ifndef SPLICE_H
9#define SPLICE_H
10
11#include <linux/pipe_fs_i.h>
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14
15
16#define SPLICE_F_MOVE (0x01)
17#define SPLICE_F_NONBLOCK (0x02)
18
19
20#define SPLICE_F_MORE (0x04)
21#define SPLICE_F_GIFT (0x08)
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24
25
26struct splice_desc {
27 unsigned int len, total_len;
28 unsigned int flags;
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30
31
32 union {
33 void __user *userptr;
34 struct file *file;
35 void *data;
36 } u;
37 loff_t pos;
38 size_t num_spliced;
39 bool need_wakeup;
40};
41
42struct partial_page {
43 unsigned int offset;
44 unsigned int len;
45 unsigned long private;
46};
47
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50
51struct splice_pipe_desc {
52 struct page **pages;
53 struct partial_page *partial;
54 int nr_pages;
55 unsigned int flags;
56 const struct pipe_buf_operations *ops;
57 void (*spd_release)(struct splice_pipe_desc *, unsigned int);
58};
59
60typedef int (splice_actor)(struct pipe_inode_info *, struct pipe_buffer *,
61 struct splice_desc *);
62typedef int (splice_direct_actor)(struct pipe_inode_info *,
63 struct splice_desc *);
64
65extern ssize_t splice_from_pipe(struct pipe_inode_info *, struct file *,
66 loff_t *, size_t, unsigned int,
67 splice_actor *);
68extern ssize_t __splice_from_pipe(struct pipe_inode_info *,
69 struct splice_desc *, splice_actor *);
70extern int splice_from_pipe_feed(struct pipe_inode_info *, struct splice_desc *,
71 splice_actor *);
72extern int splice_from_pipe_next(struct pipe_inode_info *,
73 struct splice_desc *);
74extern void splice_from_pipe_begin(struct splice_desc *);
75extern void splice_from_pipe_end(struct pipe_inode_info *,
76 struct splice_desc *);
77extern int pipe_to_file(struct pipe_inode_info *, struct pipe_buffer *,
78 struct splice_desc *);
79
80extern ssize_t splice_to_pipe(struct pipe_inode_info *,
81 struct splice_pipe_desc *);
82extern ssize_t splice_direct_to_actor(struct file *, struct splice_desc *,
83 splice_direct_actor *);
84
85#endif
86