kinit/fstype/swap_fs.h

#ifndef __LINUX_SWAP_FS_H
#define __LINUX_SWAP_FS_H

/* The basic structures of the swap super block */
#define SWAP_MAGIC_L		10
#define SWAP_RESERVED_L		(1024 - SWAP_MAGIC_L)
#define SWAP_MAGIC_1		"SWAP-SPACE"
#define SWAP_MAGIC_2		"SWAPSPACE2"

/* Suspend signatures, located at same addr as swap magic */
#define SUSP_MAGIC_L		9
#define SUSP_MAGIC_1		"S1SUSPEND"
#define SUSP_MAGIC_2		"S2SUSPEND"
#define SUSP_MAGIC_U		"ULSUSPEND"

/* The superblock is the last block in the first page */
#define SWAP_OFFSET()		((getpagesize() - 1024) >> 10)

/* On-disk "super block" */
struct swap_super_block {
	char reserved[SWAP_RESERVED_L];
	char magic[SWAP_MAGIC_L];
};

#endif
1	#ifndef __LINUX_SWAP_FS_H
2	#define __LINUX_SWAP_FS_H
3
4	/* The basic structures of the swap super block */
5	#define SWAP_MAGIC_L 10
6	#define SWAP_RESERVED_L (1024 - SWAP_MAGIC_L)
7	#define SWAP_MAGIC_1 "SWAP-SPACE"
8	#define SWAP_MAGIC_2 "SWAPSPACE2"
9
10	/* Suspend signatures, located at same addr as swap magic */
11	#define SUSP_MAGIC_L 9
12	#define SUSP_MAGIC_1 "S1SUSPEND"
13	#define SUSP_MAGIC_2 "S2SUSPEND"
14	#define SUSP_MAGIC_U "ULSUSPEND"
15
16	/* The superblock is the last block in the first page */
17	#define SWAP_OFFSET() ((getpagesize() - 1024) >> 10)
18
19	/* On-disk "super block" */
20	struct swap_super_block {
21	char reserved[SWAP_RESERVED_L];
22	char magic[SWAP_MAGIC_L];
23	};
24
25	#endif