projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 55e303ae A |
1 | /* |
| 2 | * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. | |
| 7 | * | |
| 8 | * This file contains Original Code and/or Modifications of Original Code | |
| 9 | * as defined in and that are subject to the Apple Public Source License | |
| 10 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 11 | * compliance with the License. Please obtain a copy of the License at | |
| 12 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 13 | * file. | |
| 14 | * | |
| 15 | * The Original Code and all software distributed under the License are | |
| 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 20 | * Please see the License for the specific language governing rights and | |
| 21 | * limitations under the License. | |
| 22 | * | |
| 23 | * @APPLE_LICENSE_HEADER_END@ | |
| 24 | */ | |
| 25 | #ifndef __HFS_HOTFILES__ | |
| 26 | #define __HFS_HOTFILES__ | |
| 27 | ||
| 28 | #include <sys/appleapiopts.h> | |
| 29 | ||
| 30 | #ifdef KERNEL | |
| 31 | #ifdef __APPLE_API_PRIVATE | |
| 32 | ||
| 33 | ||
| 34 | #define HFC_FILENAME ".hotfiles.btree" | |
| 35 | ||
| 36 | ||
| 37 | /* | |
| 38 | * Temperature measurement constraints. | |
| 39 | */ | |
| 40 | #define HFC_DEFAULT_FILE_COUNT 1000 | |
| 41 | #define HFC_DEFAULT_DURATION (3600 * 60) | |
| 42 | #define HFC_CUMULATIVE_CYCLES 4 | |
| 43 | #define HFC_MAXIMUM_FILE_COUNT 5000 | |
| 44 | #define HFC_MAXIMUM_FILESIZE (10 * 1024 * 1024) | |
| 45 | #define HFC_MINIMUM_TEMPERATURE 16 | |
| 46 | ||
| 47 | ||
| 48 | /* | |
| 49 | * Sync constraints. | |
| 50 | */ | |
| 51 | #define HFC_BLKSPERSYNC 300 | |
| 52 | #define HFC_FILESPERSYNC 50 | |
| 53 | ||
| 54 | ||
| 55 | /* | |
| 56 | * Hot file clustering stages. | |
| 57 | */ | |
| 58 | enum hfc_stage { | |
| 59 | HFC_DISABLED, | |
| 60 | HFC_IDLE, | |
| 61 | HFC_BUSY, | |
| 62 | HFC_RECORDING, | |
| 63 | HFC_EVALUATION, | |
| 64 | HFC_EVICTION, | |
| 65 | HFC_ADOPTION, | |
| 66 | }; | |
| 67 | ||
| 68 | ||
| 69 | /* | |
| 70 | * B-tree file key format (on-disk). | |
| 71 | */ | |
| 72 | struct HotFileKey { | |
| 73 | u_int16_t keyLength; /* length of key, excluding this field */ | |
| 74 | u_int8_t forkType; /* 0 = data fork, FF = resource fork */ | |
| 75 | u_int8_t pad; /* make the other fields align on 32-bit boundary */ | |
| 76 | u_int32_t temperature; /* temperature recorded */ | |
| 77 | u_int32_t fileID; /* file ID */ | |
| 78 | }; | |
| 79 | typedef struct HotFileKey HotFileKey; | |
| 80 | ||
| 81 | #define HFC_LOOKUPTAG 0xFFFFFFFF | |
| 82 | #define HFC_KEYLENGTH (sizeof(HotFileKey) - sizeof(u_int16_t)) | |
| 83 | ||
| 84 | /* | |
| 85 | * B-tree header node user info (on-disk). | |
| 86 | */ | |
| 87 | struct HotFilesInfo { | |
| 88 | u_int32_t magic; | |
| 89 | u_int32_t version; | |
| 90 | u_int32_t duration; /* duration of sample period */ | |
| 91 | u_int32_t timebase; /* recording period start time */ | |
| 92 | u_int32_t timeleft; /* recording period stop time */ | |
| 93 | u_int32_t threshold; | |
| 94 | u_int32_t maxfileblks; | |
| 95 | u_int32_t maxfilecnt; | |
| 96 | u_int8_t tag[32]; | |
| 97 | }; | |
| 98 | typedef struct HotFilesInfo HotFilesInfo; | |
| 99 | ||
| 100 | #define HFC_MAGIC 0xFF28FF26 | |
| 101 | #define HFC_VERSION 1 | |
| 102 | ||
| 103 | ||
| 104 | struct hfsmount; | |
| 105 | struct proc; | |
| 106 | struct vnode; | |
| 107 | ||
| 108 | /* | |
| 109 | * Hot File interface functions. | |
| 110 | */ | |
| 111 | int hfs_hotfilesync (struct hfsmount *, struct proc *); | |
| 112 | ||
| 113 | int hfs_recording_init(struct hfsmount *, struct proc *); | |
| 114 | int hfs_recording_start (struct hfsmount *, struct proc *); | |
| 115 | int hfs_recording_stop (struct hfsmount *, struct proc *); | |
| 116 | int hfs_recording_suspend (struct hfsmount *, struct proc *); | |
| 117 | int hfs_recording_abort (struct hfsmount *, struct proc *); | |
| 118 | ||
| 119 | int hfs_addhotfile (struct vnode *); | |
| 120 | int hfs_removehotfile (struct vnode *); | |
| 121 | ||
| 122 | #endif /* __APPLE_API_PRIVATE */ | |
| 123 | #endif /* KERNEL */ | |
| 124 | #endif /* __HFS_HOTFILES__ */ |