1 typedef struct VacFS VacFS;
2 typedef struct VacDir VacDir;
3 typedef struct VacFile VacFile;
4 typedef struct VacDirEnum VacDirEnum;
5 
6 /*
7  * Mode bits
8  */
9 enum {
10 	ModeOtherExec = (1<<0),		
11 	ModeOtherWrite = (1<<1),
12 	ModeOtherRead = (1<<2),
13 	ModeGroupExec = (1<<3),
14 	ModeGroupWrite = (1<<4),
15 	ModeGroupRead = (1<<5),
16 	ModeOwnerExec = (1<<6),
17 	ModeOwnerWrite = (1<<7),
18 	ModeOwnerRead = (1<<8),
19 	ModeSticky = (1<<9),
20 	ModeSetUid = (1<<10),
21 	ModeSetGid = (1<<11),
22 	ModeAppend = (1<<12),		/* append only file */
23 	ModeExclusive = (1<<13),	/* lock file - plan 9 */
24 	ModeLink = (1<<14),		/* sym link */
25 	ModeDir	= (1<<15),		/* duplicate of DirEntry */
26 	ModeHidden = (1<<16),		/* MS-DOS */
27 	ModeSystem = (1<<17),		/* MS-DOS */
28 	ModeArchive = (1<<18),		/* MS-DOS */
29 	ModeTemporary = (1<<19),	/* MS-DOS */
30 	ModeSnapshot = (1<<20),		/* read only snapshot */
31 };
32 
33 enum {
34 	MetaMagic = 0x5656fc79,
35 	MetaHeaderSize = 12,
36 	MetaIndexSize = 4,
37 	IndexEntrySize = 8,
38 	DirMagic = 0x1c4d9072,
39 };
40 
41 enum {
42 	DirPlan9Entry = 1,	/* not valid in version >= 9 */
43 	DirNTEntry,		/* not valid in version >= 9 */
44 	DirQidSpaceEntry,
45 	DirGenEntry,		/* not valid in version >= 9 */
46 };
47 
48 struct VacDir {
49 	char *elem;		/* path element */
50 	ulong entry;		/* entry in directory for data */
51 	ulong gen;		/* generation of data entry */
52 	ulong mentry;		/* entry in directory for meta */
53 	ulong mgen;		/* generation of meta entry */
54 	uvlong size;		/* size of file */
55 	uvlong qid;		/* unique file id */
56 	
57 	char *uid;		/* owner id */
58 	char *gid;		/* group id */
59 	char *mid;		/* last modified by */
60 	ulong mtime;		/* last modified time */
61 	ulong mcount;		/* number of modifications: can wrap! */
62 	ulong ctime;		/* directory entry last changed */
63 	ulong atime;		/* last time accessed */
64 	ulong mode;		/* various mode bits */
65 
66 	/* plan 9 */
67 	int plan9;
68 	uvlong p9path;
69 	ulong p9version;
70 
71 	/* sub space of qid */
72 	int qidSpace;
73 	uvlong qidOffset;	/* qid offset */
74 	uvlong qidMax;		/* qid maximum */
75 };
76 
77 VacFS *vfsOpen(VtSession *z, char *file, int readOnly, long ncache);
78 VacFS *vfsCreate(VtSession *z, int bsize, long ncache);
79 int vfsGetBlockSize(VacFS*);
80 int vfsIsReadOnly(VacFS*);
81 VacFile *vfsGetRoot(VacFS*);
82 
83 long vfsGetCacheSize(VacFS*);
84 int vfsSetCacheSize(VacFS*, long);
85 int vfsSnapshot(VacFS*, char *src, char *dst);
86 int vfsSync(VacFS*);
87 int vfsClose(VacFS*);
88 int vfsGetScore(VacFS*, uchar score[VtScoreSize]);
89 
90 /* 
91  * other ideas
92  *
93  * VacFS *vfsSnapshot(VacFS*, char *src);
94  * int vfsGraft(VacFS*, char *name, VacFS*);
95  */
96 
97 VacFile *vfOpen(VacFS*, char *path);
98 VacFile *vfCreate(VacFile*, char *elem, ulong perm, char *user);
99 VacFile *vfWalk(VacFile*, char *elem);
100 int vfRemove(VacFile*, char*);
101 int vfRead(VacFile*, void *, int n, vlong offset);
102 int vfWrite(VacFile*, void *, int n, vlong offset, char *user);
103 int vfReadPacket(VacFile*, Packet**, vlong offset);
104 int vfWritePacket(VacFile*, Packet*, vlong offset, char *user);
105 uvlong vfGetId(VacFile*);
106 ulong vfGetMcount(VacFile*);
107 int vfIsDir(VacFile*);
108 int vfGetBlockScore(VacFile*, ulong bn, uchar score[VtScoreSize]);
109 int vfGetSize(VacFile*, uvlong *size);
110 int vfGetDir(VacFile*, VacDir*);
111 int vfSetDir(VacFile*, VacDir*);
112 int vfGetVtEntry(VacFile*, VtEntry*);
113 VacFile *vfGetParent(VacFile*);
114 int vfSync(VacFile*);
115 VacFile *vfIncRef(VacFile*);
116 void vfDecRef(VacFile*);
117 VacDirEnum *vfDirEnum(VacFile*);
118 int vfIsRoot(VacFile *vf);
119 
120 void	vdCleanup(VacDir *dir);
121 void	vdCopy(VacDir *dst, VacDir *src);
122 
123 VacDirEnum *vdeOpen(VacFS*, char *path);
124 int vdeRead(VacDirEnum*, VacDir *, int n);
125 void vdeFree(VacDirEnum*);
126