ref: ff4daa7e93f4ea09506276ecdb69fa1cca19a7a7
dir: /sys/src/cmd/disk/kfs/9p1lib.c/
#include "all.h"
#include "9p1.h"
#define CHAR(x) *p++ = f->x
#define SHORT(x) { ulong vvv = f->x; p[0] = vvv; p[1] = vvv>>8; p += 2; }
#define VLONG(q) p[0] = (q); p[1] = (q)>>8; p[2] = (q)>>16; p[3] = (q)>>24; p += 4
#define LONG(x) { ulong vvv = f->x; VLONG(vvv); }
#define BYTES(x,n) memmove(p, f->x, n); p += n
#define STRING(x,n) strncpy((char*)p, f->x, n); p += n
int
convS2M9p1(Oldfcall *f, uchar *ap)
{
uchar *p;
int t;
p = ap;
CHAR(type);
t = f->type;
SHORT(tag);
switch(t)
{
default:
print("convS2M9p1: bad type: %d\n", t);
return 0;
case Tnop9p1:
case Tosession9p1:
break;
case Tsession9p1:
BYTES(chal, sizeof(f->chal));
break;
case Tflush9p1:
SHORT(oldtag);
break;
case Tattach9p1:
SHORT(fid);
STRING(uname, sizeof(f->uname));
STRING(aname, sizeof(f->aname));
BYTES(ticket, sizeof(f->ticket));
BYTES(auth, sizeof(f->auth));
break;
case Toattach9p1:
SHORT(fid);
STRING(uname, sizeof(f->uname));
STRING(aname, sizeof(f->aname));
BYTES(ticket, NAMELEN);
break;
case Tclone9p1:
SHORT(fid);
SHORT(newfid);
break;
case Twalk9p1:
SHORT(fid);
STRING(name, sizeof(f->name));
break;
case Tclwalk9p1:
SHORT(fid);
SHORT(newfid);
STRING(name, sizeof(f->name));
break;
case Topen9p1:
SHORT(fid);
CHAR(mode);
break;
case Tcreate9p1:
SHORT(fid);
STRING(name, sizeof(f->name));
LONG(perm);
CHAR(mode);
break;
case Tread9p1:
SHORT(fid);
LONG(offset); VLONG(0);
SHORT(count);
break;
case Twrite9p1:
SHORT(fid);
LONG(offset); VLONG(0);
SHORT(count);
p++;
if((uchar*)p == (uchar*)f->data) {
p += f->count;
break;
}
BYTES(data, f->count);
break;
case Tclunk9p1:
case Tremove9p1:
case Tstat9p1:
SHORT(fid);
break;
case Twstat9p1:
SHORT(fid);
BYTES(stat, sizeof(f->stat));
break;
/*
*/
case Rnop9p1:
case Rosession9p1:
case Rflush9p1:
break;
case Rsession9p1:
BYTES(chal, sizeof(f->chal));
BYTES(authid, sizeof(f->authid));
BYTES(authdom, sizeof(f->authdom));
break;
case Rerror9p1:
STRING(ename, sizeof(f->ename));
break;
case Rclone9p1:
case Rclunk9p1:
case Rremove9p1:
case Rwstat9p1:
SHORT(fid);
break;
case Rwalk9p1:
case Ropen9p1:
case Rcreate9p1:
case Rclwalk9p1:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
break;
case Rattach9p1:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
BYTES(rauth, sizeof(f->rauth));
break;
case Roattach9p1:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
break;
case Rread9p1:
SHORT(fid);
SHORT(count);
p++;
if((uchar*)p == (uchar*)f->data) {
p += f->count;
break;
}
BYTES(data, f->count);
break;
case Rwrite9p1:
SHORT(fid);
SHORT(count);
break;
case Rstat9p1:
SHORT(fid);
BYTES(stat, sizeof(f->stat));
break;
}
return p - (uchar*)ap;
}
/*
* buggery to give false qid for
* the top 2 levels of the dump fs
*/
static ulong
fakeqid9p1(Dentry *f)
{
ulong q;
int c;
q = f->qid.path;
if(q == (QPROOT|QPDIR)) {
c = f->name[0];
if(c >= '0' && c <= '9') {
q = 3|QPDIR;
c = (c-'0')*10 + (f->name[1]-'0');
if(c >= 1 && c <= 12)
q = 4|QPDIR;
}
}
return q;
}
int
convD2M9p1(Dentry *f, char *ap)
{
uchar *p;
ulong q;
p = (uchar*)ap;
STRING(name, sizeof(f->name));
memset(p, 0, 2*NAMELEN);
uidtostr((char*)p, f->uid);
p += NAMELEN;
uidtostr((char*)p, f->gid);
p += NAMELEN;
q = fakeqid9p1(f);
VLONG(q);
LONG(qid.version);
{
q = f->mode & 0x0fff;
if(f->mode & DDIR)
q |= PDIR;
if(f->mode & DAPND)
q |= PAPND;
if(f->mode & DLOCK)
q |= PLOCK;
VLONG(q);
}
LONG(atime);
LONG(mtime);
LONG(size); VLONG(0);
VLONG(0);
return p - (uchar*)ap;
}
#undef CHAR
#undef SHORT
#undef LONG
#undef VLONG
#undef BYTES
#undef STRING
#define CHAR(x) f->x = *p++
#define SHORT(x) f->x = (p[0] | (p[1]<<8)); p += 2
#define VLONG(q) q = (p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24)); p += 4
#define LONG(x) VLONG(f->x)
#define BYTES(x,n) memmove(f->x, p, n); p += n
#define STRING(x,n) memmove(f->x, p, n); p += n
int
convM2S9p1(uchar *ap, Oldfcall *f, int n)
{
uchar *p;
int t;
p = ap;
CHAR(type);
t = f->type;
SHORT(tag);
switch(t)
{
default:
/*
* only whine if it couldn't be a 9P2000 Tversion9p1.
*/
if(t != 19 || ap[4] != 100)
print("convM2S9p1: bad type: %d\n", f->type);
return 0;
case Tnop9p1:
case Tosession9p1:
break;
case Tsession9p1:
BYTES(chal, sizeof(f->chal));
break;
case Tflush9p1:
SHORT(oldtag);
break;
case Tattach9p1:
SHORT(fid);
BYTES(uname, sizeof(f->uname));
BYTES(aname, sizeof(f->aname));
BYTES(ticket, sizeof(f->ticket));
BYTES(auth, sizeof(f->auth));
break;
case Toattach9p1:
SHORT(fid);
BYTES(uname, sizeof(f->uname));
BYTES(aname, sizeof(f->aname));
BYTES(ticket, NAMELEN);
break;
case Tclone9p1:
SHORT(fid);
SHORT(newfid);
break;
case Twalk9p1:
SHORT(fid);
BYTES(name, sizeof(f->name));
break;
case Tclwalk9p1:
SHORT(fid);
SHORT(newfid);
BYTES(name, sizeof(f->name));
break;
case Tremove9p1:
SHORT(fid);
break;
case Topen9p1:
SHORT(fid);
CHAR(mode);
break;
case Tcreate9p1:
SHORT(fid);
BYTES(name, sizeof(f->name));
LONG(perm);
CHAR(mode);
break;
case Tread9p1:
SHORT(fid);
LONG(offset); p += 4;
SHORT(count);
break;
case Twrite9p1:
SHORT(fid);
LONG(offset); p += 4;
SHORT(count);
p++;
f->data = (char*)p; p += f->count;
break;
case Tclunk9p1:
case Tstat9p1:
SHORT(fid);
break;
case Twstat9p1:
SHORT(fid);
BYTES(stat, sizeof(f->stat));
break;
/*
*/
case Rnop9p1:
case Rosession9p1:
break;
case Rsession9p1:
BYTES(chal, sizeof(f->chal));
BYTES(authid, sizeof(f->authid));
BYTES(authdom, sizeof(f->authdom));
break;
case Rerror9p1:
BYTES(ename, sizeof(f->ename));
break;
case Rflush9p1:
break;
case Rclone9p1:
case Rclunk9p1:
case Rremove9p1:
case Rwstat9p1:
SHORT(fid);
break;
case Rwalk9p1:
case Rclwalk9p1:
case Ropen9p1:
case Rcreate9p1:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
break;
case Rattach9p1:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
BYTES(rauth, sizeof(f->rauth));
break;
case Roattach9p1:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
break;
case Rread9p1:
SHORT(fid);
SHORT(count);
p++;
f->data = (char*)p; p += f->count;
break;
case Rwrite9p1:
SHORT(fid);
SHORT(count);
break;
case Rstat9p1:
SHORT(fid);
BYTES(stat, sizeof(f->stat));
break;
}
if((uchar*)ap+n == p)
return n;
return 0;
}
int
convM2D9p1(char *ap, Dentry *f)
{
uchar *p;
char str[28];
p = (uchar*)ap;
BYTES(name, sizeof(f->name));
memmove(str, p, NAMELEN);
p += NAMELEN;
f->uid = strtouid(str);
memmove(str, p, NAMELEN);
p += NAMELEN;
f->gid = strtouid(str);
LONG(qid.path);
LONG(qid.version);
{
LONG(atime);
f->mode = (f->atime & 0x0fff) | DALLOC;
if(f->atime & PDIR)
f->mode |= DDIR;
if(f->atime & PAPND)
f->mode |= DAPND;
if(f->atime & PLOCK)
f->mode |= DLOCK;
}
LONG(atime);
LONG(mtime);
LONG(size); p += 4;
p += 4;
return p - (uchar*)ap;
}