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 {
11 	ModeOtherExec = (1<<0),		
12 	ModeOtherWrite = (1<<1),
13 	ModeOtherRead = (1<<2),
14 	ModeGroupExec = (1<<3),
15 	ModeGroupWrite = (1<<4),
16 	ModeGroupRead = (1<<5),
17 	ModeOwnerExec = (1<<6),
18 	ModeOwnerWrite = (1<<7),
19 	ModeOwnerRead = (1<<8),
20 	ModeSticky = (1<<9),
21 	ModeSetUid = (1<<10),
22 	ModeSetGid = (1<<11),
23 	ModeAppend = (1<<12),		/* append only file */
24 	ModeExclusive = (1<<13),	/* lock file - plan 9 */
25 	ModeLink = (1<<14),		/* sym link */
26 	ModeDir	= (1<<15),		/* duplicate of DirEntry */
27 	ModeHidden = (1<<16),		/* MS-DOS */
28 	ModeSystem = (1<<17),		/* MS-DOS */
29 	ModeArchive = (1<<18),		/* MS-DOS */
30 	ModeTemporary = (1<<19),	/* MS-DOS */
31 	ModeSnapshot = (1<<20),		/* read only snapshot */
32 	ModeDevice = (1<<21),		/* Unix device */
33 	ModeNamedPipe = (1<<22)	/* Unix named pipe */
34 };
35 
36 enum
37 {
38 	MetaMagic = 0x5656fc79,
39 	MetaHeaderSize = 12,
40 	MetaIndexSize = 4,
41 	IndexEntrySize = 8,
42 	DirMagic = 0x1c4d9072
43 };
44 
45 enum
46 {
47 	DirPlan9Entry = 1,	/* not valid in version >= 9 */
48 	DirNTEntry,		/* not valid in version >= 9 */
49 	DirQidSpaceEntry,
50 	DirGenEntry		/* not valid in version >= 9 */
51 };
52 
53 struct VacDir
54 {
55 	char *elem;		/* path element */
56 	ulong entry;		/* entry in directory for data */
57 	ulong gen;		/* generation of data entry */
58 	ulong mentry;		/* entry in directory for meta */
59 	ulong mgen;		/* generation of meta entry */
60 	uvlong size;		/* size of file */
61 	uvlong qid;		/* unique file id */
62 	
63 	char *uid;		/* owner id */
64 	char *gid;		/* group id */
65 	char *mid;		/* last modified by */
66 	ulong mtime;		/* last modified time */
67 	ulong mcount;		/* number of modifications: can wrap! */
68 	ulong ctime;		/* directory entry last changed */
69 	ulong atime;		/* last time accessed */
70 	ulong mode;		/* various mode bits */
71 
72 	/* plan 9 */
73 	int plan9;
74 	uvlong p9path;
75 	ulong p9version;
76 
77 	/* sub space of qid */
78 	int qidspace;
79 	uvlong qidoffset;	/* qid offset */
80 	uvlong qidmax;		/* qid maximum */
81 };
82 
83 
84 struct VacFs
85 {
86 	int		ref;
87 	uchar	score[VtScoreSize];
88 	VacFile	*root;
89 	VtConn	*z;
90 	int		mode;
91 	int		bsize;
92 	uvlong	qid;
93 	VtCache	*cache;
94 };
95 
96 VacFs	*vacfsopen(VtConn *z, char *file, int mode, int ncache);
97 VacFs	*vacfsopenscore(VtConn *z, u8int *score, int mode, int ncache);
98 VacFs	*vacfscreate(VtConn *z, int bsize, int ncache);
99 void		vacfsclose(VacFs *fs);
100 int		vacfssync(VacFs *fs);
101 int		vacfssnapshot(VacFs *fs, char *src, char *dst);
102 int		vacfsgetscore(VacFs *fs, u8int *score);
103 
104 /* 
105  * other ideas
106  *
107  * VacFs *vfsSnapshot(VacFs*, char *src);
108  * int vfsGraft(VacFs*, char *name, VacFs*);
109  */
110 
111 VacFile *vacfsgetroot(VacFs *fs);
112 VacFile	*vacfileopen(VacFs *fs, char *path);
113 VacFile	*vacfilecreate(VacFile *file, char *elem, ulong perm, char *muid);
114 VacFile	*vacfilewalk(VacFile *file, char *elem);
115 int		vacfileremove(VacFile *file, char *muid);
116 int		vacfileread(VacFile *file, void *buf, int n, vlong offset);
117 int		vacfileblockscore(VacFile *file, u32int, u8int*);
118 int		vacfilewrite(VacFile *file, void *buf, int n, vlong offset, char *muid);
119 int		vacfilereadpacket(VacFile *file, Packet **pp, vlong offset);
120 int		vacfilewritepacket(VacFile *file, Packet *p, vlong offset, char *muid);
121 uvlong	vacfilegetid(VacFile *file);
122 ulong	vacfilegetmcount(VacFile *file);
123 int		vacfileisdir(VacFile *file);
124 int		vacfileisroot(VacFile *file);
125 ulong	vacfilegetmode(VacFile *file);
126 int		vacfilegetblocksize(VacFile *file, u32int bn, u8int *score);
127 int		vacfilegetsize(VacFile *file, uvlong *size);
128 int		vacfilegetdir(VacFile *file, VacDir *dir);
129 int		vacfilesetdir(VacFile *file, VacDir *dir, char *muid);
130 int		vacfilegetvtentry(VacFile *file, VtEntry *entry);
131 VacFile	*vacfilegetparent(VacFile *file);
132 int		vacfilesync(VacFile*);
133 VacFile	*vacfileincref(VacFile*);
134 int		vacfiledecref(VacFile*);
135 
136 void		vdcleanup(VacDir *dir);
137 void		vdcopy(VacDir *dst, VacDir *src);
138 
139 
140 VacDirEnum	*vdeopen(VacFile*);
141 int			vderead(VacDirEnum*, VacDir *);
142 void			vdeclose(VacDirEnum*);
143