1 /****************************************************************************
2 ****************************************************************************
4 *** This header was automatically generated from a Linux kernel header
5 *** of the same name, to make information necessary for userspace to
6 *** call into the kernel available to libc. It contains only constants,
7 *** structures, and macros generated from the original header, and thus,
8 *** contains no copyrightable information.
10 ****************************************************************************
11 ****************************************************************************/
12 #ifndef _LINUX_RELAY_H
13 #define _LINUX_RELAY_H
15 #include <linux/types.h>
16 #include <linux/sched.h>
17 #include <linux/wait.h>
18 #include <linux/list.h>
20 #include <linux/poll.h>
21 #include <linux/kref.h>
23 #define FIX_SIZE(x) ((((x) - 1) & PAGE_MASK) + PAGE_SIZE)
25 #define RELAYFS_CHANNEL_VERSION 6
32 size_t subbufs_produced;
33 size_t subbufs_consumed;
35 wait_queue_head_t read_wait;
36 struct work_struct wake_readers;
37 struct dentry *dentry;
39 struct page **page_array;
40 unsigned int page_count;
41 unsigned int finalized;
44 size_t bytes_consumed;
46 } ____cacheline_aligned;
54 struct rchan_callbacks *cb;
58 struct rchan_buf *buf[NR_CPUS];
61 struct rchan_callbacks
64 int (*subbuf_start) (struct rchan_buf *buf,
69 void (*buf_mapped)(struct rchan_buf *buf,
72 void (*buf_unmapped)(struct rchan_buf *buf,
75 struct dentry *(*create_buf_file)(const char *filename,
76 struct dentry *parent,
78 struct rchan_buf *buf,
81 int (*remove_buf_file)(struct dentry *dentry);
84 struct rchan *relay_open(const char *base_filename,
85 struct dentry *parent,
88 struct rchan_callbacks *cb);