| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | #include <linux/kernel.h> | 
| NeilBrown | bff6197 | 2009-03-31 14:33:13 +1100 | [diff] [blame] | 3 | #include <linux/blkdev.h> | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | #include <linux/init.h> | 
 | 5 | #include <linux/syscalls.h> | 
 | 6 | #include <linux/unistd.h> | 
 | 7 | #include <linux/slab.h> | 
 | 8 | #include <linux/mount.h> | 
 | 9 | #include <linux/major.h> | 
 | 10 | #include <linux/root_dev.h> | 
 | 11 |  | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | void  change_floppy(char *fmt, ...); | 
 | 13 | void  mount_block_root(char *name, int flags); | 
 | 14 | void  mount_root(void); | 
 | 15 | extern int root_mountflags; | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 |  | 
| Greg Kroah-Hartman | bdaf852 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 17 | static inline int create_dev(char *name, dev_t dev) | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | { | 
| Dominik Brodowski | 0f32ab8 | 2018-03-11 11:34:47 +0100 | [diff] [blame] | 19 | 	ksys_unlink(name); | 
| Dominik Brodowski | 87c4e19 | 2018-03-11 11:34:50 +0100 | [diff] [blame] | 20 | 	return ksys_mknod(name, S_IFBLK|0600, new_encode_dev(dev)); | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | } | 
 | 22 |  | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | static inline u32 bstat(char *name) | 
 | 24 | { | 
| Arnd Bergmann | 046aa12 | 2017-05-08 15:57:00 -0700 | [diff] [blame] | 25 | 	struct kstat stat; | 
 | 26 | 	if (vfs_stat(name, &stat) != 0) | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | 		return 0; | 
| Arnd Bergmann | 046aa12 | 2017-05-08 15:57:00 -0700 | [diff] [blame] | 28 | 	if (!S_ISBLK(stat.mode)) | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | 		return 0; | 
| Arnd Bergmann | 046aa12 | 2017-05-08 15:57:00 -0700 | [diff] [blame] | 30 | 	return stat.rdev; | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | } | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 |  | 
 | 33 | #ifdef CONFIG_BLK_DEV_RAM | 
 | 34 |  | 
 | 35 | int __init rd_load_disk(int n); | 
 | 36 | int __init rd_load_image(char *from); | 
 | 37 |  | 
 | 38 | #else | 
 | 39 |  | 
 | 40 | static inline int rd_load_disk(int n) { return 0; } | 
 | 41 | static inline int rd_load_image(char *from) { return 0; } | 
 | 42 |  | 
 | 43 | #endif | 
 | 44 |  | 
 | 45 | #ifdef CONFIG_BLK_DEV_INITRD | 
 | 46 |  | 
| Yaowei Bai | f057f3b | 2016-01-20 14:59:29 -0800 | [diff] [blame] | 47 | bool __init initrd_load(void); | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 |  | 
 | 49 | #else | 
 | 50 |  | 
| Yaowei Bai | f057f3b | 2016-01-20 14:59:29 -0800 | [diff] [blame] | 51 | static inline bool initrd_load(void) { return false; } | 
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 |  | 
 | 53 | #endif | 
 | 54 |  | 
 | 55 | #ifdef CONFIG_BLK_DEV_MD | 
 | 56 |  | 
 | 57 | void md_run_setup(void); | 
 | 58 |  | 
 | 59 | #else | 
 | 60 |  | 
 | 61 | static inline void md_run_setup(void) {} | 
 | 62 |  | 
 | 63 | #endif |