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 int ret = 1; 20 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; 34 if (!dump_write(file, buf, n)) { 35 ret = 0; 36 break; 37 } 38 off -= n; 39 } 40 free_page((unsigned long)buf); 41 } 42 return ret; 43 } 44 45 #endif /* _LINUX_COREDUMP_H */ 46