/*
* Copyright (c) 2000-2013 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
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*/
#ifndef _VM_VM_COMPRESSOR_BACKING_STORE_H_
#define _VM_VM_COMPRESSOR_BACKING_STORE_H_
#ifdef MACH_KERNEL_PRIVATE
#include <kern/kern_types.h>
#include <kern/locks.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_xnu.h>
#include <libkern/crypto/aes.h>
#include <kern/host_statistics.h>
#include <vm/vm_pageout_xnu.h>
#include <vm/vm_compressor_backing_store_xnu.h>
#if !XNU_TARGET_OS_OSX
#define MIN_SWAP_FILE_SIZE (64 * 1024 * 1024ULL)
#define MAX_SWAP_FILE_SIZE (128 * 1024 * 1024ULL)
#else /* !XNU_TARGET_OS_OSX */
#define MIN_SWAP_FILE_SIZE (256 * 1024 * 1024ULL)
#define MAX_SWAP_FILE_SIZE (1 * 1024 * 1024 * 1024ULL)
#endif /* !XNU_TARGET_OS_OSX */
#if defined(XNU_TARGET_OS_OSX)
#define SWAP_VOLUME_NAME "/System/Volumes"
#define SWAP_FILE_NAME SWAP_VOLUME_NAME "/VM/swapfile"
#else
#define SWAP_VOLUME_NAME "/private/var"
#define SWAP_FILE_NAME SWAP_VOLUME_NAME "/vm/swapfile"
#endif
#define SWAPFILENAME_LEN (int)(strlen(SWAP_FILE_NAME))
#define SWAP_SLOT_MASK 0x1FFFFFFFF
#define SWAP_DEVICE_SHIFT 33
extern int vm_num_swap_files;
extern uint64_t vm_swap_volume_capacity;
struct swapfile;
boolean_t vm_swap_create_file(void);
struct swapout_io_completion {
int swp_io_busy;
int swp_io_done;
int swp_io_error;
uint32_t swp_c_size;
c_segment_t swp_c_seg;
struct swapfile *swp_swf;
uint64_t swp_f_offset;
struct upl_io_completion swp_upl_ctx;
};
void vm_swapout_iodone(void *, int);
kern_return_t vm_swap_put_finish(struct swapfile *, uint64_t *, int, boolean_t);
kern_return_t vm_swap_put(vm_offset_t, uint64_t*, uint32_t, c_segment_t, struct swapout_io_completion *);
void vm_swap_flush(void);
void vm_swap_reclaim(void);
void vm_swap_encrypt(c_segment_t);
uint64_t vm_swap_get_used_space(void);
uint64_t vm_swap_get_max_configured_space(void);
void vm_swap_reset_max_segs_tracking(uint64_t *alloced_max, uint64_t *used_max);
extern __startup_func void vm_compressor_swap_init_swap_file_limit(void);
#endif /* MACH_KERNEL_PRIVATE */
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, void *upl_ctx);
extern int vm_record_file_write(struct vnode *vp, uint64_t offset, char *buf, int size);
int vm_swap_vol_get_capacity(const char *volume_name, uint64_t *capacity);
#if CONFIG_FREEZE
int vm_swap_vol_get_budget(struct vnode* vp, uint64_t *freeze_daily_budget);
#endif /* CONFIG_FREEZE */
#endif /* _VM_VM_COMPRESSOR_BACKING_STORE_H_ */