1 /* 2 * Copyright (c) 2000-2013 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 #ifndef _VM_VM_COMPRESSOR_BACKING_STORE_H_ 29 #define _VM_VM_COMPRESSOR_BACKING_STORE_H_ 30 31 #ifdef MACH_KERNEL_PRIVATE 32 33 #include <kern/kern_types.h> 34 #include <kern/locks.h> 35 #include <vm/vm_kern.h> 36 #include <mach/kern_return.h> 37 #include <kern/queue.h> 38 #include <vm/vm_pageout.h> 39 #include <vm/vm_protos.h> 40 #include <vm/vm_compressor_xnu.h> 41 #include <libkern/crypto/aes.h> 42 #include <kern/host_statistics.h> 43 #include <vm/vm_pageout_xnu.h> 44 #include <vm/vm_compressor_backing_store_xnu.h> 45 46 #if !XNU_TARGET_OS_OSX 47 48 #define MIN_SWAP_FILE_SIZE (64 * 1024 * 1024ULL) 49 50 #define MAX_SWAP_FILE_SIZE (128 * 1024 * 1024ULL) 51 52 #else /* !XNU_TARGET_OS_OSX */ 53 54 #define MIN_SWAP_FILE_SIZE (256 * 1024 * 1024ULL) 55 56 #define MAX_SWAP_FILE_SIZE (1 * 1024 * 1024 * 1024ULL) 57 58 #endif /* !XNU_TARGET_OS_OSX */ 59 60 #if defined(XNU_TARGET_OS_OSX) 61 #define SWAP_VOLUME_NAME "/System/Volumes" 62 #define SWAP_FILE_NAME SWAP_VOLUME_NAME "/VM/swapfile" 63 #else 64 #define SWAP_VOLUME_NAME "/private/var" 65 #define SWAP_FILE_NAME SWAP_VOLUME_NAME "/vm/swapfile" 66 #endif 67 68 #define SWAPFILENAME_LEN (int)(strlen(SWAP_FILE_NAME)) 69 70 71 #define SWAP_SLOT_MASK 0x1FFFFFFFF 72 #define SWAP_DEVICE_SHIFT 33 73 74 extern int vm_num_swap_files; 75 extern uint64_t vm_swap_volume_capacity; 76 77 struct swapfile; 78 79 boolean_t vm_swap_create_file(void); 80 81 82 struct swapout_io_completion { 83 int swp_io_busy; 84 int swp_io_done; 85 int swp_io_error; 86 87 uint32_t swp_c_size; 88 c_segment_t swp_c_seg; 89 90 struct swapfile *swp_swf; 91 uint64_t swp_f_offset; 92 93 struct upl_io_completion swp_upl_ctx; 94 }; 95 void vm_swapout_iodone(void *, int); 96 97 98 kern_return_t vm_swap_put_finish(struct swapfile *, uint64_t *, int, boolean_t); 99 kern_return_t vm_swap_put(vm_offset_t, uint64_t*, uint32_t, c_segment_t, struct swapout_io_completion *); 100 101 void vm_swap_flush(void); 102 void vm_swap_reclaim(void); 103 void vm_swap_encrypt(c_segment_t); 104 105 uint64_t vm_swap_get_used_space(void); 106 uint64_t vm_swap_get_max_configured_space(void); 107 void vm_swap_reset_max_segs_tracking(uint64_t *alloced_max, uint64_t *used_max); 108 109 extern __startup_func void vm_compressor_swap_init_swap_file_limit(void); 110 111 112 113 114 #endif /* MACH_KERNEL_PRIVATE */ 115 116 struct vnode; 117 118 extern void vm_swapfile_open(const char *path, struct vnode **vp); 119 extern void vm_swapfile_close(uint64_t path, struct vnode *vp); 120 extern int vm_swapfile_preallocate(struct vnode *vp, uint64_t *size, boolean_t *pin); 121 extern uint64_t vm_swapfile_get_blksize(struct vnode *vp); 122 extern uint64_t vm_swapfile_get_transfer_size(struct vnode *vp); 123 extern int vm_swapfile_io(struct vnode *vp, uint64_t offset, uint64_t start, int npages, int flags, void *upl_ctx); 124 extern int vm_record_file_write(struct vnode *vp, uint64_t offset, char *buf, int size); 125 int vm_swap_vol_get_capacity(const char *volume_name, uint64_t *capacity); 126 #if CONFIG_FREEZE 127 int vm_swap_vol_get_budget(struct vnode* vp, uint64_t *freeze_daily_budget); 128 #endif /* CONFIG_FREEZE */ 129 130 131 #endif /* _VM_VM_COMPRESSOR_BACKING_STORE_H_ */ 132