aboutsummaryrefslogtreecommitdiff
path: root/src/cmd/vac/vac.h
blob: a0c4a91fb49027583ddd0eaae957bcf2604d4c45 (plain)
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
125
126
127
128
129
130
131
132
133
134
135
136
typedef struct VacFs VacFs;
typedef struct VacDir VacDir;
typedef struct VacFile VacFile;
typedef struct VacDirEnum VacDirEnum;

/*
 * Mode bits
 */
enum
{
	ModeOtherExec = (1<<0),		
	ModeOtherWrite = (1<<1),
	ModeOtherRead = (1<<2),
	ModeGroupExec = (1<<3),
	ModeGroupWrite = (1<<4),
	ModeGroupRead = (1<<5),
	ModeOwnerExec = (1<<6),
	ModeOwnerWrite = (1<<7),
	ModeOwnerRead = (1<<8),
	ModeSticky = (1<<9),
	ModeSetUid = (1<<10),
	ModeSetGid = (1<<11),
	ModeAppend = (1<<12),		/* append only file */
	ModeExclusive = (1<<13),	/* lock file - plan 9 */
	ModeLink = (1<<14),		/* sym link */
	ModeDir	= (1<<15),		/* duplicate of DirEntry */
	ModeHidden = (1<<16),		/* MS-DOS */
	ModeSystem = (1<<17),		/* MS-DOS */
	ModeArchive = (1<<18),		/* MS-DOS */
	ModeTemporary = (1<<19),	/* MS-DOS */
	ModeSnapshot = (1<<20),		/* read only snapshot */
	ModeDevice = (1<<21),		/* Unix device */
	ModeNamedPipe = (1<<22)	/* Unix named pipe */
};

enum
{
	MetaMagic = 0x5656fc79,
	MetaHeaderSize = 12,
	MetaIndexSize = 4,
	IndexEntrySize = 8,
	DirMagic = 0x1c4d9072
};

enum
{
	DirPlan9Entry = 1,	/* not valid in version >= 9 */
	DirNTEntry,		/* not valid in version >= 9 */
	DirQidSpaceEntry,
	DirGenEntry		/* not valid in version >= 9 */
};

struct VacDir
{
	char *elem;		/* path element */
	ulong entry;		/* entry in directory for data */
	ulong gen;		/* generation of data entry */
	ulong mentry;		/* entry in directory for meta */
	ulong mgen;		/* generation of meta entry */
	uvlong size;		/* size of file */
	uvlong qid;		/* unique file id */
	
	char *uid;		/* owner id */
	char *gid;		/* group id */
	char *mid;		/* last modified by */
	ulong mtime;		/* last modified time */
	ulong mcount;		/* number of modifications: can wrap! */
	ulong ctime;		/* directory entry last changed */
	ulong atime;		/* last time accessed */
	ulong mode;		/* various mode bits */

	/* plan 9 */
	int plan9;
	uvlong p9path;
	ulong p9version;

	/* sub space of qid */
	int qidspace;
	uvlong qidoffset;	/* qid offset */
	uvlong qidmax;		/* qid maximum */
};


struct VacFs
{
	int		ref;
	uchar	score[VtScoreSize];
	VacFile	*root;
	VtConn	*z;
	int		mode;
	int		bsize;
	uvlong	qid;
	VtCache	*cache;
};

VacFs	*vacfsopen(VtConn *z, char *file, int mode, int ncache);
VacFs	*vacfsopenscore(VtConn *z, u8int *score, int mode, int ncache);
VacFs	*vacfscreate(VtConn *z, int bsize, int ncache);
void		vacfsclose(VacFs *fs);
int		vacfssync(VacFs *fs);
int		vacfssnapshot(VacFs *fs, char *src, char *dst);
int		vacfsgetscore(VacFs *fs, u8int *score);

VacFile *vacfsgetroot(VacFs *fs);
VacFile	*vacfileopen(VacFs *fs, char *path);
VacFile	*vacfilecreate(VacFile *file, char *elem, ulong perm, char *muid);
VacFile	*vacfilewalk(VacFile *file, char *elem);
int		vacfileremove(VacFile *file, char *muid);
int		vacfileread(VacFile *file, void *buf, int n, vlong offset);
int		vacfileblockscore(VacFile *file, u32int, u8int*);
int		vacfilewrite(VacFile *file, void *buf, int n, vlong offset, char *muid);
int		vacfilereadpacket(VacFile *file, Packet **pp, vlong offset);
int		vacfilewritepacket(VacFile *file, Packet *p, vlong offset, char *muid);
uvlong	vacfilegetid(VacFile *file);
ulong	vacfilegetmcount(VacFile *file);
int		vacfileisdir(VacFile *file);
int		vacfileisroot(VacFile *file);
ulong	vacfilegetmode(VacFile *file);
int		vacfilegetblocksize(VacFile *file, u32int bn, u8int *score);
int		vacfilegetsize(VacFile *file, uvlong *size);
int		vacfilegetdir(VacFile *file, VacDir *dir);
int		vacfilesetdir(VacFile *file, VacDir *dir, char *muid);
int		vacfilegetvtentry(VacFile *file, VtEntry *entry);
VacFile	*vacfilegetparent(VacFile *file);
int		vacfilesync(VacFile*);
VacFile	*vacfileincref(VacFile*);
int		vacfiledecref(VacFile*);

void		vdcleanup(VacDir *dir);
void		vdcopy(VacDir *dst, VacDir *src);


VacDirEnum	*vdeopen(VacFile*);
int			vderead(VacDirEnum*, VacDir *);
void			vdeclose(VacDirEnum*);
int	vdeunread(VacDirEnum*);