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 |