Subversion Repositories planix.SVN

#pragma src     "/sys/src/libc/9sys"
#pragma lib     "libc.a"

#define VERSION9P       "9P2000"

#define MAXWELEM        16

typedef
struct  Fcall
{
        uchar   type;
        u32int  fid;
        ushort  tag;
        union {
                struct {
                        u32int  msize;          /* Tversion, Rversion */
                        char    *version;       /* Tversion, Rversion */
                };
                struct {
                        ushort  oldtag;         /* Tflush */
                };
                struct {
                        char    *ename;         /* Rerror */
                };
                struct {
                        Qid     qid;            /* Rattach, Ropen, Rcreate */
                        u32int  iounit;         /* Ropen, Rcreate */
                };
                struct {
                        Qid     aqid;           /* Rauth */
                };
                struct {
                        u32int  afid;           /* Tauth, Tattach */
                        char    *uname;         /* Tauth, Tattach */
                        char    *aname;         /* Tauth, Tattach */
                };
                struct {
                        u32int  perm;           /* Tcreate */ 
                        char    *name;          /* Tcreate */
                        uchar   mode;           /* Tcreate, Topen */
                };
                struct {
                        u32int  newfid;         /* Twalk */
                        ushort  nwname;         /* Twalk */
                        char    *wname[MAXWELEM];       /* Twalk */
                };
                struct {
                        ushort  nwqid;          /* Rwalk */
                        Qid     wqid[MAXWELEM];         /* Rwalk */
                };
                struct {
                        vlong   offset;         /* Tread, Twrite */
                        u32int  count;          /* Tread, Twrite, Rread */
                        char    *data;          /* Twrite, Rread */
                };
                struct {
                        ushort  nstat;          /* Twstat, Rstat */
                        uchar   *stat;          /* Twstat, Rstat */
                };
        };
} Fcall;


#define GBIT8(p)        ((p)[0])
#define GBIT16(p)       ((p)[0]|((p)[1]<<8))
#define GBIT32(p)       ((p)[0]|((p)[1]<<8)|((p)[2]<<16)|((p)[3]<<24))
#define GBIT64(p)       ((u32int)((p)[0]|((p)[1]<<8)|((p)[2]<<16)|((p)[3]<<24)) |\
                                ((vlong)((p)[4]|((p)[5]<<8)|((p)[6]<<16)|((p)[7]<<24)) << 32))

#define PBIT8(p,v)      (p)[0]=(v)
#define PBIT16(p,v)     (p)[0]=(v);(p)[1]=(v)>>8
#define PBIT32(p,v)     (p)[0]=(v);(p)[1]=(v)>>8;(p)[2]=(v)>>16;(p)[3]=(v)>>24
#define PBIT64(p,v)     (p)[0]=(v);(p)[1]=(v)>>8;(p)[2]=(v)>>16;(p)[3]=(v)>>24;\
                        (p)[4]=(v)>>32;(p)[5]=(v)>>40;(p)[6]=(v)>>48;(p)[7]=(v)>>56

#define BIT8SZ          1
#define BIT16SZ         2
#define BIT32SZ         4
#define BIT64SZ         8
#define QIDSZ   (BIT8SZ+BIT32SZ+BIT64SZ)

/* STATFIXLEN includes leading 16-bit count */
/* The count, however, excludes itself; total size is BIT16SZ+count */
#define STATFIXLEN      (BIT16SZ+QIDSZ+5*BIT16SZ+4*BIT32SZ+1*BIT64SZ)   /* amount of fixed length data in a stat buffer */

#define NOTAG           (ushort)~0U     /* Dummy tag */
#define NOFID           (u32int)~0U     /* Dummy fid */
#define IOHDRSZ         24      /* ample room for Twrite/Rread header (iounit) */

enum
{
        Tversion =      100,
        Rversion,
        Tauth =         102,
        Rauth,
        Tattach =       104,
        Rattach,
        Terror =        106,    /* illegal */
        Rerror,
        Tflush =        108,
        Rflush,
        Twalk =         110,
        Rwalk,
        Topen =         112,
        Ropen,
        Tcreate =       114,
        Rcreate,
        Tread =         116,
        Rread,
        Twrite =        118,
        Rwrite,
        Tclunk =        120,
        Rclunk,
        Tremove =       122,
        Rremove,
        Tstat =         124,
        Rstat,
        Twstat =        126,
        Rwstat,
        Tmax,
};

uint    convM2S(uchar*, uint, Fcall*);
uint    convS2M(Fcall*, uchar*, uint);
uint    sizeS2M(Fcall*);

int     statcheck(uchar *abuf, uint nbuf);
uint    convM2D(uchar*, uint, Dir*, char*);
uint    convD2M(Dir*, uchar*, uint);
uint    sizeD2M(Dir*);

int     fcallfmt(Fmt*);
int     dirfmt(Fmt*);
int     dirmodefmt(Fmt*);

int     read9pmsg(int, void*, uint);

#pragma varargck        type    "F"     Fcall*
#pragma varargck        type    "M"     ulong
#pragma varargck        type    "D"     Dir*