| #ifndef _LINUX_COREDUMP_H |
| #define _LINUX_COREDUMP_H |
| |
| #include <linux/types.h> |
| #include <linux/mm.h> |
| #include <linux/fs.h> |
| |
| /* |
| * These are the only things you should do on a core-file: use only these |
| * functions to write out all the necessary info. |
| */ |
| static inline int dump_write(struct file *file, const void *addr, int nr) |
| { |
| return file->f_op->write(file, addr, nr, &file->f_pos) == nr; |
| } |
| |
| static inline int dump_seek(struct file *file, loff_t off) |
| { |
| if (file->f_op->llseek && file->f_op->llseek != no_llseek) { |
| if (file->f_op->llseek(file, off, SEEK_CUR) < 0) |
| return 0; |
| } else { |
| char *buf = (char *)get_zeroed_page(GFP_KERNEL); |
| |
| if (!buf) |
| return 0; |
| while (off > 0) { |
| unsigned long n = off; |
| |
| if (n > PAGE_SIZE) |
| n = PAGE_SIZE; |
| if (!dump_write(file, buf, n)) |
| return 0; |
| off -= n; |
| } |
| free_page((unsigned long)buf); |
| } |
| return 1; |
| } |
| |
| #endif /* _LINUX_COREDUMP_H */ |