92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
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/****************************************************************************
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****************************************************************************
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***
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*** This header was automatically generated from a Linux kernel header
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*** of the same name, to make information necessary for userspace to
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*** call into the kernel available to libc. It contains only constants,
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*** structures, and macros generated from the original header, and thus,
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*** contains no copyrightable information.
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***
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****************************************************************************
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****************************************************************************/
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#ifndef _LINUX_RELAY_H
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#define _LINUX_RELAY_H
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/list.h>
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#include <linux/fs.h>
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#include <linux/poll.h>
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#include <linux/kref.h>
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#define FIX_SIZE(x) ((((x) - 1) & PAGE_MASK) + PAGE_SIZE)
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#define RELAYFS_CHANNEL_VERSION 6
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struct rchan_buf
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{
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void *start;
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void *data;
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size_t offset;
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size_t subbufs_produced;
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size_t subbufs_consumed;
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struct rchan *chan;
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wait_queue_head_t read_wait;
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struct work_struct wake_readers;
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struct dentry *dentry;
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struct kref kref;
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struct page **page_array;
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unsigned int page_count;
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unsigned int finalized;
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size_t *padding;
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size_t prev_padding;
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size_t bytes_consumed;
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unsigned int cpu;
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} ____cacheline_aligned;
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struct rchan
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{
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u32 version;
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size_t subbuf_size;
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size_t n_subbufs;
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size_t alloc_size;
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struct rchan_callbacks *cb;
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struct kref kref;
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void *private_data;
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size_t last_toobig;
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struct rchan_buf *buf[NR_CPUS];
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};
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struct rchan_callbacks
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{
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int (*subbuf_start) (struct rchan_buf *buf,
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void *subbuf,
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void *prev_subbuf,
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size_t prev_padding);
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void (*buf_mapped)(struct rchan_buf *buf,
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struct file *filp);
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void (*buf_unmapped)(struct rchan_buf *buf,
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struct file *filp);
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struct dentry *(*create_buf_file)(const char *filename,
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struct dentry *parent,
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int mode,
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struct rchan_buf *buf,
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int *is_global);
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int (*remove_buf_file)(struct dentry *dentry);
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};
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struct rchan *relay_open(const char *base_filename,
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struct dentry *parent,
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size_t subbuf_size,
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size_t n_subbufs,
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struct rchan_callbacks *cb);
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#endif
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