static char *
logspace(LogfsServer *server, int active, int takearisk, int nbytes, uchar **where, u32int *flashaddr)
{
char *errmsg;
LogfsLowLevel *ll = server->ll;
int pagesize = 1 << ll->l2pagesize;
LogSegment *seg;
if(nbytes > pagesize)
return logfselogmsgtoobig;
retry:
seg = active ? server->activelog : server->sweptlog;
for(;;) {
//print("curpage %d nbytes %d\n", seg->curpage, seg->nbytes);
if(seg->curpage >= 0) {
if(seg->nbytes + nbytes < pagesize)
break;
errmsg = logfslogsegmentflush(server, active);
if(errmsg)
return errmsg;
}
if(seg->curpage < 0) {
long block;
long path;
block = logfsfindfreeblock(ll,
active ? (takearisk ? AllocReasonLogExtend : AllocReasonDataExtend) : AllocReasonTransfer);
if(block < 0) {
if(active) {
int didsomething;
errmsg = logfsserverlogsweep(server, 0, &didsomething);
if(errmsg)
return errmsg;
if(didsomething)
goto retry;
}
return logfselogfull;
}
seg->blockmap[++seg->curblockindex] = block;
path = mklogpath(seg->curblockindex, seg->gen, 0);
(*ll->setblocktag)(ll, block, LogfsTlog);
(*ll->setblockpath)(ll, block, path);
seg->curpage = 0;
#ifdef FUTURE
/* TODO - do we need one of these if the underlying system supports erase counting? */
seg->pagebuf[0] = LogfsLogTstart;
PBIT16(seg->pagebuf + 1, 8);
PBIT32(seg->pagebuf + 3, path); /* TODO duplicate information */
PBIT32(seg->pagebuf + 7, 0); /* TODO don't have this - discuss with forsyth */
seg->nbytes = 11;
#else
seg->nbytes = 0;
#endif
}
}
*where = seg->pagebuf + seg->nbytes;
if(flashaddr)
*flashaddr = logfsspo2flashaddr(server, seg->curblockindex, seg->curpage, seg->nbytes);
seg->nbytes += nbytes;
return nil;
}
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);
}
int
xopenfd(Msg *m)
{
char errs[ERRMAX];
int n, p[2];
Conn *nc;
if(pipe(p) < 0){
rerrstr(errs, sizeof errs);
err(m, errs);
/* XXX return here? */
}
if(verbose) fprint(2, "%T xopen pipe %d %d...", p[0], p[1]);
/* now we're committed. */
/* a new connection for this fid */
nc = emalloc(sizeof(Conn));
nc->internal = chancreate(sizeof(void*), 0);
/* a ref for us */
nc->fdfid = m->fid;
m->fid->ref++;
nc->fdfid->openfd++;
nc->fdmode = m->tx.mode;
nc->fd = p[0];
/* a thread to tend the pipe */
threadcreate(openfdthread, nc, STACK);
/* if mode is ORDWR, that openfdthread will write; start a reader */
if((m->tx.mode&3) == ORDWR){
nc = emalloc(sizeof(Conn));
nc->internal = chancreate(sizeof(void*), 0);
nc->fdfid = m->fid;
m->fid->ref++;
nc->fdfid->openfd++;
nc->fdmode = OREAD;
nc->fd = dup(p[0], -1);
threadcreate(openfdthread, nc, STACK);
}
/* steal fid from other connection */
if(delhash(m->c->fid, m->fid->cfid, m->fid) == 0)
fidput(m->fid);
/* rewrite as Ropenfd */
m->rx.type = Ropenfd;
n = GBIT32(m->rpkt);
m->rpkt = erealloc(m->rpkt, n+4);
PBIT32(m->rpkt+n, p[1]);
n += 4;
PBIT32(m->rpkt, n);
m->rpkt[4] = Ropenfd;
m->rx.unixfd = p[1];
return 0;
}
uchar*
read9ppkt(Ioproc *io, int fd)
{
uchar buf[4], *pkt;
int n, nn;
n = ioreadn(io, fd, buf, 4);
if(n != 4)
return nil;
n = GBIT32(buf);
if(n > MAXMSGSIZE)
return nil;
pkt = emalloc(n);
PBIT32(pkt, n);
nn = ioreadn(io, fd, pkt+4, n-4);
if(nn != n-4){
free(pkt);
return nil;
}
/* would do this if we ever got one of these, but we only generate them
if(pkt[4] == Ropenfd){
newfd = iorecvfd(io, fd);
PBIT32(pkt+n-4, newfd);
}
*/
return pkt;
}
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;
}
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;
}
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;
}
}
static int
pcicfgrw(Pcidev *pcidev, int rno, int data, int len, int read)
{
uchar buf[4];
if(read){
memset(buf, 0, sizeof(buf));
if(pread(pcidev->rawfd, buf, len, rno) != len)
return -1;
switch(len){
case 1:
return GBIT8(buf);
case 2:
return GBIT16(buf);
case 4:
return GBIT32(buf);
default:
abort();
}
} else {
switch(len){
case 1:
PBIT8(buf, data);
break;
case 2:
PBIT16(buf, data);
break;
case 4:
PBIT32(buf, data);
break;
default:
abort();
}
if(pwrite(pcidev->rawfd, buf, len, rno) != len)
return -1;
}
return 0;
}
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;
}