#include <linux/suspend.h>#include <linux/utsname.h> struct swsusp_info {	struct new_utsname	uts;	u32			version_code;	unsigned long		num_physpages;	int			cpus;	unsigned long		image_pages;	unsigned long		pages;	unsigned long		size;} __attribute__((aligned(PAGE_SIZE)));   #ifdef CONFIG_SOFTWARE_SUSPENDextern int pm_suspend_disk(void); #elsestatic inline int pm_suspend_disk(void){	return -EPERM;}#endif extern struct mutex pm_mutex; #define power_attr(_name) \static struct subsys_attribute _name##_attr = {	\	.attr	= {				\		.name = __stringify(_name),	\		.mode = 0644,			\	},					\	.show	= _name##_show,			\	.store	= _name##_store,		\} extern struct subsystem power_subsys; /* References to section boundaries */extern const void __nosave_begin, __nosave_end; /* Preferred image size in bytes (default 500 MB) */extern unsigned long image_size;extern int in_suspend;extern dev_t swsusp_resume_device;extern sector_t swsusp_resume_block; extern asmlinkage int swsusp_arch_suspend(void);extern asmlinkage int swsusp_arch_resume(void); extern unsigned int count_data_pages(void); /** *	Auxiliary structure used for reading the snapshot image data and *	metadata from and writing them to the list of page backup entries *	(PBEs) which is the main data structure of swsusp. * *	Using struct snapshot_handle we can transfer the image, including its *	metadata, as a continuous sequence of bytes with the help of *	snapshot_read_next() and snapshot_write_next(). * *	The code that writes the image to a storage or transfers it to *	the user land is required to use snapshot_read_next() for this *	purpose and it should not make any assumptions regarding the internal *	structure of the image.  Similarly, the code that reads the image from *	a storage or transfers it from the user land is required to use *	snapshot_write_next(). * *	This may allow us to change the internal structure of the image *	in the future with considerably less effort. */ struct snapshot_handle {	loff_t		offset;	/* number of the last byte ready for reading				 * or writing in the sequence				 */	unsigned int	cur;	/* number of the block of PAGE_SIZE bytes the				 * next operation will refer to (ie. current)				 */	unsigned int	cur_offset;	/* offset with respect to the current					 * block (for the next operation)					 */	unsigned int	prev;	/* number of the block of PAGE_SIZE bytes that				 * was the current one previously				 */	void		*buffer;	/* address of the block to read from					 * or write to					 */	unsigned int	buf_offset;	/* location to read from or write to,					 * given as a displacement from 'buffer'					 */	int		sync_read;	/* Set to one to notify the caller of					 * snapshot_write_next() that it may					 * need to call wait_on_bio_chain()					 */}; /* This macro returns the address from/to which the caller of * snapshot_read_next()/snapshot_write_next() is allowed to * read/write data after the function returns */#define data_of(handle)	((handle).buffer + (handle).buf_offset) extern unsigned int snapshot_additional_pages(struct zone *zone);extern int snapshot_read_next(struct snapshot_handle *handle, size_t count);extern int snapshot_write_next(struct snapshot_handle *handle, size_t count);extern void snapshot_write_finalize(struct snapshot_handle *handle);extern int snapshot_image_loaded(struct snapshot_handle *handle); /* * This structure is used to pass the values needed for the identification * of the resume swap area from a user space to the kernel via the * SNAPSHOT_SET_SWAP_AREA ioctl */struct resume_swap_area {	loff_t offset;	u_int32_t dev;} __attribute__((packed)); #define SNAPSHOT_IOC_MAGIC	'3'#define SNAPSHOT_FREEZE			_IO(SNAPSHOT_IOC_MAGIC, 1)#define SNAPSHOT_UNFREEZE		_IO(SNAPSHOT_IOC_MAGIC, 2)#define SNAPSHOT_ATOMIC_SNAPSHOT	_IOW(SNAPSHOT_IOC_MAGIC, 3, void *)#define SNAPSHOT_ATOMIC_RESTORE		_IO(SNAPSHOT_IOC_MAGIC, 4)#define SNAPSHOT_FREE			_IO(SNAPSHOT_IOC_MAGIC, 5)#define SNAPSHOT_SET_IMAGE_SIZE		_IOW(SNAPSHOT_IOC_MAGIC, 6, unsigned long)#define SNAPSHOT_AVAIL_SWAP		_IOR(SNAPSHOT_IOC_MAGIC, 7, void *)#define SNAPSHOT_GET_SWAP_PAGE		_IOR(SNAPSHOT_IOC_MAGIC, 8, void *)#define SNAPSHOT_FREE_SWAP_PAGES	_IO(SNAPSHOT_IOC_MAGIC, 9)#define SNAPSHOT_SET_SWAP_FILE		_IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned int)#define SNAPSHOT_S2RAM			_IO(SNAPSHOT_IOC_MAGIC, 11)#define SNAPSHOT_PMOPS			_IOW(SNAPSHOT_IOC_MAGIC, 12, unsigned int)#define SNAPSHOT_SET_SWAP_AREA		_IOW(SNAPSHOT_IOC_MAGIC, 13, \							struct resume_swap_area)#define SNAPSHOT_IOC_MAXNR	13 #define PMOPS_PREPARE	1#define PMOPS_ENTER	2#define PMOPS_FINISH	3 /** *	The bitmap is used for tracing allocated swap pages * *	The entire bitmap consists of a number of bitmap_page *	structures linked with the help of the .next member. *	Thus each page can be allocated individually, so we only *	need to make 0-order memory allocations to create *	the bitmap. */ #define BITMAP_PAGE_SIZE	(PAGE_SIZE - sizeof(void *))#define BITMAP_PAGE_CHUNKS	(BITMAP_PAGE_SIZE / sizeof(long))#define BITS_PER_CHUNK		(sizeof(long) * 8)#define BITMAP_PAGE_BITS	(BITMAP_PAGE_CHUNKS * BITS_PER_CHUNK) struct bitmap_page {	unsigned long		chunks[BITMAP_PAGE_CHUNKS];	struct bitmap_page	*next;}; extern void free_bitmap(struct bitmap_page *bitmap);extern struct bitmap_page *alloc_bitmap(unsigned int nr_bits);extern sector_t alloc_swapdev_block(int swap, struct bitmap_page *bitmap);extern void free_all_swap_pages(int swap, struct bitmap_page *bitmap); extern int swsusp_check(void);extern int swsusp_shrink_memory(void);extern void swsusp_free(void);extern int swsusp_suspend(void);extern int swsusp_resume(void);extern int swsusp_read(void);extern int swsusp_write(void);extern void swsusp_close(void);extern int suspend_enter(suspend_state_t state); struct timeval;extern void swsusp_show_speed(struct timeval *, struct timeval *,				unsigned int, char *);