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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | /* * 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 * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #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.h> #include <libkern/crypto/aes.h> #include <kern/host_statistics.h> #if CONFIG_EMBEDDED #define MIN_SWAP_FILE_SIZE (64 * 1024 * 1024ULL) #define MAX_SWAP_FILE_SIZE (128 * 1024 * 1024ULL) #else /* CONFIG_EMBEDDED */ #define MIN_SWAP_FILE_SIZE (256 * 1024 * 1024ULL) #define MAX_SWAP_FILE_SIZE (1 * 1024 * 1024 * 1024ULL) #endif /* CONFIG_EMBEDDED */ #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) #if defined(XNU_TARGET_OS_OSX) #define SWAP_FILE_NAME "/System/Volumes/VM/swapfile" #else #define SWAP_FILE_NAME "/private/var/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; struct swapfile; void vm_swap_init(void); 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); static void vm_swapout_finish(c_segment_t, uint64_t, uint32_t, kern_return_t); 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_total_space(void); uint64_t vm_swap_get_used_space(void); uint64_t vm_swap_get_free_space(void); uint64_t vm_swap_get_max_configured_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, void *upl_ctx); #if CONFIG_FREEZE boolean_t vm_swap_max_budget(uint64_t *); int vm_swap_vol_get_budget(struct vnode* vp, uint64_t *freeze_daily_budget); #endif /* CONFIG_FREEZE */ #if RECORD_THE_COMPRESSED_DATA extern int vm_record_file_write(struct vnode *vp, uint64_t offset, char *buf, int size); #endif |