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1#ifndef _LINUX_COREDUMP_H
2#define _LINUX_COREDUMP_H
3
4#include <linux/types.h>
5#include <linux/mm.h>
6#include <linux/fs.h>
7
8/*
9 * These are the only things you should do on a core-file: use only these
10 * functions to write out all the necessary info.
11 */
12static inline int dump_write(struct file *file, const void *addr, int nr)
13{
14 return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
15}
16
17static inline int dump_seek(struct file *file, loff_t off)
18{
19 if (file->f_op->llseek && file->f_op->llseek != no_llseek) {
20 if (file->f_op->llseek(file, off, SEEK_CUR) < 0)
21 return 0;
22 } else {
23 char *buf = (char *)get_zeroed_page(GFP_KERNEL);
24
25 if (!buf)
26 return 0;
27 while (off > 0) {
28 unsigned long n = off;
29
30 if (n > PAGE_SIZE)
31 n = PAGE_SIZE;
32 if (!dump_write(file, buf, n))
33 return 0;
34 off -= n;
35 }
36 free_page((unsigned long)buf);
37 }
38 return 1;
39}
40
41#endif /* _LINUX_COREDUMP_H */