git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | { | |
| 0eead9ab | 14 | return access_ok(VERIFY_READ, addr, nr) && file->f_op->write(file, addr, nr, &file->f_pos) == nr; |
| 088e7af7 DH |
15 | } |
| 16 | ||
| 17 | static inline int dump_seek(struct file *file, loff_t off) | |
| 18 | { | |
| 6e3e37a5 AGR |
19 | int ret = 1; |
| 20 | ||
| 088e7af7 DH |
21 | if (file->f_op->llseek && file->f_op->llseek != no_llseek) { |
| 22 | if (file->f_op->llseek(file, off, SEEK_CUR) < 0) | |
| 23 | return 0; | |
| 24 | } else { | |
| 25 | char *buf = (char *)get_zeroed_page(GFP_KERNEL); | |
| 26 | ||
| 27 | if (!buf) | |
| 28 | return 0; | |
| 29 | while (off > 0) { | |
| 30 | unsigned long n = off; | |
| 31 | ||
| 32 | if (n > PAGE_SIZE) | |
| 33 | n = PAGE_SIZE; | |
| 6e3e37a5 AGR |
34 | if (!dump_write(file, buf, n)) { |
| 35 | ret = 0; | |
| 36 | break; | |
| 37 | } | |
| 088e7af7 DH |
38 | off -= n; |
| 39 | } | |
| 40 | free_page((unsigned long)buf); | |
| 41 | } | |
| 6e3e37a5 | 42 | return ret; |
| 088e7af7 DH |
43 | } |
| 44 | ||
| 45 | #endif /* _LINUX_COREDUMP_H */ |