1 #ifndef _FCALL_H_
2 #define _FCALL_H_ 1
3 #ifdef __cplusplus
4 extern "C" {
5 #endif
6 /*
7 #pragma	src	"/sys/src/libc/9sys"
8 #pragma	lib	"libc.a"
9 */
10 
11 #define	VERSION9P	"9P2000"
12 #define	MAXWELEM	16
13 
14 typedef
15 struct	Fcall
16 {
17 	uchar	type;
18 	u32int	fid;
19 	ushort	tag;
20 	u32int	msize;		/* Tversion, Rversion */
21 	char	*version;	/* Tversion, Rversion */
22 	ushort	oldtag;		/* Tflush */
23 	char	*ename;		/* Rerror */
24 	Qid	qid;		/* Rattach, Ropen, Rcreate */
25 	u32int	iounit;		/* Ropen, Rcreate */
26 	Qid	aqid;		/* Rauth */
27 	u32int	afid;		/* Tauth, Tattach */
28 	char	*uname;		/* Tauth, Tattach */
29 	char	*aname;		/* Tauth, Tattach */
30 	u32int	perm;		/* Tcreate */ 
31 	char	*name;		/* Tcreate */
32 	uchar	mode;		/* Tcreate, Topen */
33 	u32int	newfid;		/* Twalk */
34 	ushort	nwname;		/* Twalk */
35 	char	*wname[MAXWELEM];	/* Twalk */
36 	ushort	nwqid;		/* Rwalk */
37 	Qid	wqid[MAXWELEM];	/* Rwalk */
38 	vlong	offset;		/* Tread, Twrite */
39 	u32int	count;		/* Tread, Twrite, Rread */
40 	char	*data;		/* Twrite, Rread */
41 	ushort	nstat;		/* Twstat, Rstat */
42 	uchar	*stat;		/* Twstat, Rstat */
43 	int	unixfd;		/* Ropenfd */
44 	
45 	/* 9P2000.u extensions */
46 	int	errornum;	/* Rerror */
47 } Fcall;
48 
49 
50 #define	GBIT8(p)	((p)[0])
51 #define	GBIT16(p)	((p)[0]|((p)[1]<<8))
52 #define	GBIT32(p)	((p)[0]|((p)[1]<<8)|((p)[2]<<16)|((p)[3]<<24))
53 #define	GBIT64(p)	((u32int)((p)[0]|((p)[1]<<8)|((p)[2]<<16)|((p)[3]<<24)) |\
54 				((vlong)((p)[4]|((p)[5]<<8)|((p)[6]<<16)|((p)[7]<<24)) << 32))
55 
56 #define	PBIT8(p,v)	(p)[0]=(v)
57 #define	PBIT16(p,v)	(p)[0]=(v);(p)[1]=(v)>>8
58 #define	PBIT32(p,v)	(p)[0]=(v);(p)[1]=(v)>>8;(p)[2]=(v)>>16;(p)[3]=(v)>>24
59 #define	PBIT64(p,v)	(p)[0]=(v);(p)[1]=(v)>>8;(p)[2]=(v)>>16;(p)[3]=(v)>>24;\
60 			(p)[4]=(v)>>32;(p)[5]=(v)>>40;(p)[6]=(v)>>48;(p)[7]=(v)>>56
61 
62 #define	BIT8SZ		1
63 #define	BIT16SZ		2
64 #define	BIT32SZ		4
65 #define	BIT64SZ		8
66 #define	QIDSZ	(BIT8SZ+BIT32SZ+BIT64SZ)
67 
68 /* STATFIXLEN includes leading 16-bit count */
69 /* The count, however, excludes itself; total size is BIT16SZ+count */
70 #define STATFIXLEN	(BIT16SZ+QIDSZ+5*BIT16SZ+4*BIT32SZ+1*BIT64SZ)	/* amount of fixed length data in a stat buffer */
71 #define STATFIXLENU	(STATFIXLEN+BIT16SZ+3*BIT32SZ)	/* for 9P2000.u */
72 
73 #define	NOTAG		(ushort)~0U	/* Dummy tag */
74 #define	NOFID		(u32int)~0U	/* Dummy fid */
75 #define	IOHDRSZ		24	/* ample room for Twrite/Rread header (iounit) */
76 
77 enum
78 {
79 	Tversion =	100,
80 	Rversion,
81 	Tauth =		102,
82 	Rauth,
83 	Tattach =	104,
84 	Rattach,
85 	Terror =	106,	/* illegal */
86 	Rerror,
87 	Tflush =	108,
88 	Rflush,
89 	Twalk =		110,
90 	Rwalk,
91 	Topen =		112,
92 	Ropen,
93 	Tcreate =	114,
94 	Rcreate,
95 	Tread =		116,
96 	Rread,
97 	Twrite =	118,
98 	Rwrite,
99 	Tclunk =	120,
100 	Rclunk,
101 	Tremove =	122,
102 	Rremove,
103 	Tstat =		124,
104 	Rstat,
105 	Twstat =	126,
106 	Rwstat,
107 	Tmax,
108 
109 	Topenfd = 	98,
110 	Ropenfd,
111 };
112 
113 uint	convM2S(uchar*, uint, Fcall*);
114 uint	convS2M(Fcall*, uchar*, uint);
115 uint	sizeS2M(Fcall*);
116 
117 int	statcheck(uchar *abuf, uint nbuf);
118 uint	convM2D(uchar*, uint, Dir*, char*);
119 uint	convD2M(Dir*, uchar*, uint);
120 uint	sizeD2M(Dir*);
121 
122 uint	convM2Su(uchar*, uint, Fcall*, int);
123 uint	convS2Mu(Fcall*, uchar*, uint, int);
124 uint	sizeS2Mu(Fcall*, int);
125 
126 int	statchecku(uchar *abuf, uint nbuf, int);
127 uint	convM2Du(uchar*, uint, Dir*, char*, int);
128 uint	convD2Mu(Dir*, uchar*, uint, int);
129 uint	sizeD2Mu(Dir*, int);
130 
131 int	fcallfmt(Fmt*);
132 int	dirfmt(Fmt*);
133 int	dirmodefmt(Fmt*);
134 
135 int	read9pmsg(int, void*, uint);
136 
137 /*
138 #pragma	varargck	type	"F"	Fcall*
139 #pragma	varargck	type	"M"	ulong
140 #pragma	varargck	type	"D"	Dir*
141 */
142 
143 #ifdef __cplusplus
144 }
145 #endif
146 #endif