u32int
logfsflattenentry(LogfsIdentityStore *is, uchar *buf, u32int limit, Entry *e)
{
int unamelen, gnamelen, munamelen, namelen;
uint len;
uchar *p;
int unamebad = 0, gnamebad = 0, munamebad = 0;
char *uname, *gname, *muname;
id2name(is, e->uid, &uname, &unamebad, &unamelen);
id2name(is, e->gid, &gname, &gnamebad, &gnamelen);
id2name(is, e->muid, &muname, &munamebad, &munamelen);
namelen = strlen(e->name);
len = 49 + unamelen + unamebad + gnamelen + gnamebad + munamelen + munamebad + namelen;
if(buf == nil)
return len;
if(len > limit)
return 0;
p = buf;
/* size */ PBIT16(p, len - BIT16SZ); p += BIT16SZ;
/* type */ p += BIT16SZ;
/* dev */ p += BIT32SZ;
/* qid.type */ *p++ = e->qid.type;
/* qid.vers */ PBIT32(p, e->qid.vers); p += BIT32SZ;
/* qid.path */ PBIT64(p, e->qid.path); p+= 8;
/* mode */ PBIT32(p, e->perm); p+= BIT32SZ;
/* atime */ PBIT32(p, e->mtime); p+= BIT32SZ;
/* mtime */ PBIT32(p, e->mtime); p+= BIT32SZ;
/* length */ if(e->qid.type & QTDIR) {
PBIT64(p, 0);
p += 8;
}
else {
PBIT32(p, e->u.file.length); p += BIT32SZ;
PBIT32(p, 0); p += BIT32SZ;
}
/* name */ PBIT16(p, namelen); p += BIT16SZ; memmove(p, e->name, namelen); p+= namelen;
/* uid */ PBIT16(p, unamelen + unamebad); p += BIT16SZ;
if(unamebad)
*p++ = '(';
memmove(p, uname, unamelen + unamebad); p+= unamelen;
if(unamebad)
*p++ = ')';
/* gid */ PBIT16(p, gnamelen + gnamebad); p += BIT16SZ;
if(gnamebad)
*p++ = '(';
memmove(p, gname, gnamelen); p+= gnamelen;
if(gnamebad)
*p++ = ')';
/* muid */ PBIT16(p, munamelen + munamebad); p += BIT16SZ;
if(munamebad)
*p++ = '(';
memmove(p, muname, munamelen); p+= munamelen;
if(munamebad)
*p = ')';
//print("len %ud p - buf %ld\n", len, p - buf);
return len;
}
static void
packoldstat(uchar *buf, Dir *d)
{
uchar *p;
ulong q;
/* lay down old stat buffer - grotty code but it's temporary */
p = buf;
strncpy((char*)p, d->name, 28);
p += 28;
strncpy((char*)p, d->uid, 28);
p += 28;
strncpy((char*)p, d->gid, 28);
p += 28;
q = d->qid.path & ~DMDIR; /* make sure doesn't accidentally look like directory */
if(d->qid.type & QTDIR) /* this is the real test of a new directory */
q |= DMDIR;
PBIT32(p, q);
p += BIT32SZ;
PBIT32(p, d->qid.vers);
p += BIT32SZ;
PBIT32(p, d->mode);
p += BIT32SZ;
PBIT32(p, d->atime);
p += BIT32SZ;
PBIT32(p, d->mtime);
p += BIT32SZ;
PBIT64(p, d->length);
p += BIT64SZ;
PBIT16(p, d->type);
p += BIT16SZ;
PBIT16(p, d->dev);
}
static
uchar*
pqid(uchar *p, Qid *q)
{
PBIT8(p, q->type);
p += BIT8SZ;
PBIT32(p, q->vers);
p += BIT32SZ;
PBIT64(p, q->path);
p += BIT64SZ;
return p;
}
void
rewritehdr(Fcall *f, uchar *pkt)
{
int i, n;
n = GBIT32(pkt);
PBIT16(pkt+5, f->tag);
switch(f->type){
case Tversion:
case Rversion:
restring(pkt, n, f->version);
break;
case Tauth:
PBIT32(pkt+7, f->afid);
restring(pkt, n, f->uname);
restring(pkt, n, f->aname);
break;
case Tflush:
PBIT16(pkt+7, f->oldtag);
break;
case Tattach:
restring(pkt, n, f->uname);
restring(pkt, n, f->aname);
PBIT32(pkt+7, f->fid);
PBIT32(pkt+11, f->afid);
break;
case Twalk:
PBIT32(pkt+7, f->fid);
PBIT32(pkt+11, f->newfid);
for(i=0; i<f->nwname; i++)
restring(pkt, n, f->wname[i]);
break;
case Tcreate:
restring(pkt, n, f->name);
/* fall through */
case Topen:
case Tclunk:
case Tremove:
case Tstat:
case Twstat:
case Twrite:
PBIT32(pkt+7, f->fid);
break;
case Tread:
PBIT32(pkt+7, f->fid);
PBIT64(pkt+11, f->offset);
break;
case Rerror:
restring(pkt, n, f->ename);
break;
}
}
uint
convD2M(Dir *d, uchar *buf, uint nbuf)
{
uchar *p, *ebuf;
char *sv[5];
int i, ns, nsv[5], ss, nstr, fixlen;
if(nbuf < BIT16SZ)
return 0;
p = buf;
ebuf = buf + nbuf;
sv[0] = d->name;
sv[1] = d->uid;
sv[2] = d->gid;
sv[3] = d->muid;
fixlen = STATFIXLEN;
nstr = 4;
ns = 0;
for(i = 0; i < nstr; i++) {
if(sv[i])
nsv[i] = strlen(sv[i]);
else
nsv[i] = 0;
ns += nsv[i];
}
ss = fixlen + ns;
/* set size befor erroring, so user can know how much is needed */
/* note that length excludes count field itself */
PBIT16(p, ss-BIT16SZ);
p += BIT16SZ;
if(ss > nbuf)
return BIT16SZ;
PBIT16(p, d->type);
p += BIT16SZ;
PBIT32(p, d->dev);
p += BIT32SZ;
PBIT8(p, d->qid.type);
p += BIT8SZ;
PBIT32(p, d->qid.vers);
p += BIT32SZ;
PBIT64(p, d->qid.path);
p += BIT64SZ;
PBIT32(p, d->mode);
p += BIT32SZ;
PBIT32(p, d->atime);
p += BIT32SZ;
PBIT32(p, d->mtime);
p += BIT32SZ;
PBIT64(p, d->length);
p += BIT64SZ;
for(i = 0; i < nstr; i++) {
ns = nsv[i];
if(p + ns + BIT16SZ > ebuf)
return 0;
PBIT16(p, ns);
p += BIT16SZ;
if(ns)
memmove(p, sv[i], ns);
p += ns;
}
if(ss != p - buf)
return 0;
return p - buf;
}
uint
convS2M(Fcall *f, uchar *ap, uint nap)
{
uchar *p;
uint i, size;
size = sizeS2M(f);
if(size == 0)
return 0;
if(size > nap)
return 0;
p = (uchar*)ap;
PBIT32(p, size);
p += BIT32SZ;
PBIT8(p, f->type);
p += BIT8SZ;
PBIT16(p, f->tag);
p += BIT16SZ;
switch(f->type)
{
default:
return 0;
case Tversion:
PBIT32(p, f->msize);
p += BIT32SZ;
p = pstring(p, f->version);
break;
case Tflush:
PBIT16(p, f->oldtag);
p += BIT16SZ;
break;
case Tauth:
PBIT32(p, f->afid);
p += BIT32SZ;
p = pstring(p, f->uname);
p = pstring(p, f->aname);
break;
case Tattach:
PBIT32(p, f->fid);
p += BIT32SZ;
PBIT32(p, f->afid);
p += BIT32SZ;
p = pstring(p, f->uname);
p = pstring(p, f->aname);
break;
case Twalk:
PBIT32(p, f->fid);
p += BIT32SZ;
PBIT32(p, f->newfid);
p += BIT32SZ;
PBIT16(p, f->nwname);
p += BIT16SZ;
if(f->nwname > MAXWELEM)
return 0;
for(i=0; i<f->nwname; i++)
p = pstring(p, f->wname[i]);
break;
case Topen:
PBIT32(p, f->fid);
p += BIT32SZ;
PBIT8(p, f->mode);
p += BIT8SZ;
break;
case Tcreate:
PBIT32(p, f->fid);
p += BIT32SZ;
p = pstring(p, f->name);
PBIT32(p, f->perm);
p += BIT32SZ;
PBIT8(p, f->mode);
p += BIT8SZ;
break;
case Tread:
PBIT32(p, f->fid);
p += BIT32SZ;
PBIT64(p, f->offset);
p += BIT64SZ;
PBIT32(p, f->count);
p += BIT32SZ;
break;
case Twrite:
PBIT32(p, f->fid);
p += BIT32SZ;
PBIT64(p, f->offset);
p += BIT64SZ;
PBIT32(p, f->count);
p += BIT32SZ;
memmove(p, f->data, f->count);
p += f->count;
break;
case Tclunk:
case Tremove:
PBIT32(p, f->fid);
p += BIT32SZ;
break;
case Tstat:
PBIT32(p, f->fid);
p += BIT32SZ;
break;
case Twstat:
PBIT32(p, f->fid);
p += BIT32SZ;
PBIT16(p, f->nstat);
p += BIT16SZ;
memmove(p, f->stat, f->nstat);
p += f->nstat;
break;
/*
*/
case Rversion:
PBIT32(p, f->msize);
p += BIT32SZ;
p = pstring(p, f->version);
break;
case Rerror:
p = pstring(p, f->ename);
break;
case Rflush:
break;
case Rauth:
p = pqid(p, &f->aqid);
break;
case Rattach:
p = pqid(p, &f->qid);
break;
case Rwalk:
PBIT16(p, f->nwqid);
p += BIT16SZ;
if(f->nwqid > MAXWELEM)
return 0;
for(i=0; i<f->nwqid; i++)
p = pqid(p, &f->wqid[i]);
break;
case Ropen:
case Rcreate:
p = pqid(p, &f->qid);
PBIT32(p, f->iounit);
p += BIT32SZ;
break;
case Rread:
PBIT32(p, f->count);
p += BIT32SZ;
memmove(p, f->data, f->count);
p += f->count;
break;
case Rwrite:
PBIT32(p, f->count);
p += BIT32SZ;
break;
case Rclunk:
break;
case Rremove:
break;
case Rstat:
PBIT16(p, f->nstat);
p += BIT16SZ;
memmove(p, f->stat, f->nstat);
p += f->nstat;
break;
case Rwstat:
break;
}
if(size != p-ap)
return 0;
return size;
}
