vm_compressor_backing_store.h [plain text]
#include <kern/kern_types.h>
#include <kern/locks.h>
#include <kern/kalloc.h>
#include <vm/vm_kern.h>
#include <mach/kern_return.h>
#include <kern/queue.h>
#include <vm/vm_pageout.h>
#include <vm/vm_protos.h>
#include <vm/vm_compressor.h>
#include <libkern/crypto/aes.h>
#include <kern/host_statistics.h>
#define MIN_SWAP_FILE_SIZE (256 * 1024 * 1024)
#define MAX_SWAP_FILE_SIZE (1 * 1024 * 1024 * 1024)
#define COMPRESSED_SWAP_CHUNK_SIZE (C_SEG_BUFSIZE)
#define VM_SWAPFILE_HIWATER_SEGS (MIN_SWAP_FILE_SIZE / COMPRESSED_SWAP_CHUNK_SIZE)
#define SWAPFILE_RECLAIM_THRESHOLD_SEGS ((17 * (MAX_SWAP_FILE_SIZE / COMPRESSED_SWAP_CHUNK_SIZE)) / 10)
#define SWAPFILE_RECLAIM_MINIMUM_SEGS ((13 * (MAX_SWAP_FILE_SIZE / COMPRESSED_SWAP_CHUNK_SIZE)) / 10)
#define SWAP_FILE_NAME "/var/vm/swapfile"
#define SWAPFILENAME_LEN (int)(strlen(SWAP_FILE_NAME))
char swapfilename[MAX_SWAPFILENAME_LEN + 1];
#define SWAP_SLOT_MASK 0x1FFFFFFFF
#define SWAP_DEVICE_SHIFT 33
extern int vm_num_swap_files;
extern boolean_t vm_swap_up;
struct swapfile;
lck_grp_attr_t vm_swap_data_lock_grp_attr;
lck_grp_t vm_swap_data_lock_grp;
lck_attr_t vm_swap_data_lock_attr;
lck_mtx_ext_t vm_swap_data_lock_ext;
lck_mtx_t vm_swap_data_lock;
void vm_swap_init(void);
boolean_t vm_swap_create_file(void);
kern_return_t vm_swap_put(vm_offset_t, uint64_t*, uint64_t, c_segment_t);
void vm_swap_flush(void);
void vm_swap_reclaim(void);
void vm_swap_encrypt(c_segment_t);
uint64_t vm_swap_get_total_space(void);
uint64_t vm_swap_get_used_space(void);
uint64_t vm_swap_get_free_space(void);
struct vnode;
extern void vm_swapfile_open(const char *path, struct vnode **vp);
extern void vm_swapfile_close(uint64_t path, struct vnode *vp);
extern int vm_swapfile_preallocate(struct vnode *vp, uint64_t *size, boolean_t *pin);
extern uint64_t vm_swapfile_get_blksize(struct vnode *vp);
extern uint64_t vm_swapfile_get_transfer_size(struct vnode *vp);
extern int vm_swapfile_io(struct vnode *vp, uint64_t offset, uint64_t start, int npages, int flags);
#if RECORD_THE_COMPRESSED_DATA
extern int vm_record_file_write(struct vnode *vp, uint64_t offset, char *buf, int size);
#endif