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088e7af7 DH |
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 | */ | |
12 | static 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 | ||
17 | static 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 */ |