HCoop / hcoop / debian / openafs.git / blame
| Commit | Line | Data |
|---|---|---|
| 805e021f CE |
1 | /* |
| 2 | * Copyright 2000, International Business Machines Corporation and others. | |
| 3 | * All Rights Reserved. | |
| 4 | * | |
| 5 | * This software has been released under the terms of the IBM Public | |
| 6 | * License. For details, see the LICENSE file in the top-level source | |
| 7 | * directory or online at http://www.openafs.org/dl/license10.html | |
| 8 | */ | |
| 9 | ||
| 10 | #if !defined(__AFS_DIR_H) | |
| 11 | ||
| 12 | #define __AFS_DIR_H | |
| 13 | ||
| 14 | #define AFS_PAGESIZE 2048 /* bytes per page */ | |
| 15 | #define NHASHENT 128 /* entries in the hash tbl */ | |
| 16 | #define MAXPAGES 128 /* max pages in a dir */ | |
| 17 | #define BIGMAXPAGES 1023 /* new big max pages */ | |
| 18 | #define EPP 64 /* dir entries per page */ | |
| 19 | #define LEPP 6 /* log above */ | |
| 20 | /* When this next field changs, it is crucial to modify MakeDir, since the | |
| 21 | * latter is responsible for marking these entries as allocated. Also | |
| 22 | * change the salvager. */ | |
| 23 | #define DHE 12 /* entries in a dir header above a pages header alone. */ | |
| 24 | ||
| 25 | #define FFIRST 1 | |
| 26 | #define FNEXT 2 | |
| 27 | ||
| 28 | struct MKFid { /* A file identifier. */ | |
| 29 | afs_int32 vnode; /* file's vnode slot */ | |
| 30 | afs_int32 vunique; /* the slot incarnation number */ | |
| 31 | }; | |
| 32 | ||
| 33 | struct PageHeader { | |
| 34 | /* A page header entry. */ | |
| 35 | unsigned short pgcount; /* number of pages, or 0 if old-style */ | |
| 36 | unsigned short tag; /* 1234 in network byte order */ | |
| 37 | char freecount; /* unused, info in dirHeader structure */ | |
| 38 | char freebitmap[EPP / 8]; | |
| 39 | char padding[32 - (5 + EPP / 8)]; | |
| 40 | }; | |
| 41 | ||
| 42 | struct DirBuffer { | |
| 43 | void *buffer; | |
| 44 | void *data; | |
| 45 | }; | |
| 46 | ||
| 47 | struct DirHeader { | |
| 48 | /* A directory header object. */ | |
| 49 | struct PageHeader header; | |
| 50 | char alloMap[MAXPAGES]; /* one byte per 2K page */ | |
| 51 | unsigned short hashTable[NHASHENT]; | |
| 52 | }; | |
| 53 | ||
| 54 | struct DirEntry { | |
| 55 | /* A directory entry */ | |
| 56 | char flag; | |
| 57 | char length; /* currently unused */ | |
| 58 | unsigned short next; | |
| 59 | struct MKFid fid; | |
| 60 | char name[16]; | |
| 61 | }; | |
| 62 | ||
| 63 | struct DirXEntry { | |
| 64 | /* A directory extension entry. */ | |
| 65 | char name[32]; | |
| 66 | }; | |
| 67 | ||
| 68 | struct DirPage0 { | |
| 69 | /* A page in a directory. */ | |
| 70 | struct DirHeader header; | |
| 71 | struct DirEntry entry[1]; | |
| 72 | }; | |
| 73 | ||
| 74 | struct DirPage1 { | |
| 75 | /* A page in a directory. */ | |
| 76 | struct PageHeader header; | |
| 77 | struct DirEntry entry[1]; | |
| 78 | }; | |
| 79 | ||
| 80 | /* Prototypes */ | |
| 81 | #ifdef KERNEL | |
| 82 | struct dcache; | |
| 83 | typedef struct dcache * dir_file_t; | |
| 84 | #else | |
| 85 | struct DirHandle; | |
| 86 | typedef struct DirHandle * dir_file_t; | |
| 87 | extern void Die(const char *msg) AFS_NORETURN; | |
| 88 | #endif | |
| 89 | ||
| 90 | extern int afs_dir_NameBlobs(char *name); | |
| 91 | extern int afs_dir_Create(dir_file_t dir, char *entry, void *vfid); | |
| 92 | extern int afs_dir_Length(dir_file_t dir); | |
| 93 | extern int afs_dir_Delete(dir_file_t dir, char *entry); | |
| 94 | extern int afs_dir_MakeDir(dir_file_t dir, afs_int32 * me, | |
| 95 | afs_int32 * parent); | |
| 96 | extern int afs_dir_Lookup(dir_file_t dir, char *entry, void *fid); | |
| 97 | extern int afs_dir_LookupOffset(dir_file_t dir, char *entry, void *fid, | |
| 98 | long *offsetp); | |
| 99 | extern int afs_dir_EnumerateDir(dir_file_t dir, | |
| 100 | int (*hookproc) (void *, char *name, | |
| 101 | afs_int32 vnode, | |
| 102 | afs_int32 unique), | |
| 103 | void *hook); | |
| 104 | extern int afs_dir_IsEmpty(dir_file_t dir); | |
| 105 | extern int afs_dir_GetBlob(dir_file_t dir, afs_int32 blobno, | |
| 106 | struct DirBuffer *); | |
| 107 | extern int afs_dir_GetVerifiedBlob(dir_file_t dir, afs_int32 blobno, | |
| 108 | struct DirBuffer *); | |
| 109 | extern int afs_dir_DirHash(char *string); | |
| 110 | ||
| 111 | extern int afs_dir_InverseLookup (void *dir, afs_uint32 vnode, | |
| 112 | afs_uint32 unique, char *name, | |
| 113 | afs_uint32 length); | |
| 114 | ||
| 115 | extern int afs_dir_ChangeFid(dir_file_t dir, char *entry, | |
| 116 | afs_uint32 *old_fid, afs_uint32 *new_fid); | |
| 117 | ||
| 118 | /* buffer operations */ | |
| 119 | ||
| 120 | extern void DInit(int abuffers); | |
| 121 | extern int DRead(dir_file_t fid, int page, struct DirBuffer *); | |
| 122 | extern int DFlush(void); | |
| 123 | extern int DFlushVolume(afs_int32); | |
| 124 | extern int DNew(dir_file_t fid, int page, struct DirBuffer *); | |
| 125 | extern void DZap(dir_file_t fid); | |
| 126 | extern void DRelease(struct DirBuffer *loc, int flag); | |
| 127 | extern int DStat(int *abuffers, int *acalls, int *aios); | |
| 128 | extern int DFlushVolume(afs_int32 vid); | |
| 129 | extern int DFlushEntry(dir_file_t fid); | |
| 130 | extern int DVOffset(struct DirBuffer *); | |
| 131 | ||
| 132 | /* salvage.c */ | |
| 133 | ||
| 134 | #ifndef KERNEL | |
| 135 | extern int DirOK(void *); | |
| 136 | extern int DirSalvage(void *, void *, afs_int32, afs_int32, | |
| 137 | afs_int32, afs_int32); | |
| 138 | ||
| 139 | #endif | |
| 140 | ||
| 141 | #endif /* !defined(__AFS_DIR_H) */ |