/*
* Copy a string into mbuf(s).
* Return the number of bytes output, including XDR overheads.
*/
APPLESTATIC int
nfsm_strtom(struct nfsrv_descript *nd, const char *cp, int siz)
{
mbuf_t m2;
int xfer, left;
mbuf_t m1;
int rem, bytesize;
u_int32_t *tl;
char *cp2;
NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
*tl = txdr_unsigned(siz);
rem = NFSM_RNDUP(siz) - siz;
bytesize = NFSX_UNSIGNED + siz + rem;
m2 = nd->nd_mb;
cp2 = nd->nd_bpos;
left = M_TRAILINGSPACE(m2);
/*
* Loop around copying the string to mbuf(s).
*/
while (siz > 0) {
if (left == 0) {
if (siz > ncl_mbuf_mlen)
NFSMCLGET(m1, M_WAITOK);
else
NFSMGET(m1);
mbuf_setlen(m1, 0);
mbuf_setnext(m2, m1);
m2 = m1;
cp2 = NFSMTOD(m2, caddr_t);
left = M_TRAILINGSPACE(m2);
}
if (left >= siz)
xfer = siz;
else
xfer = left;
NFSBCOPY(cp, cp2, xfer);
cp += xfer;
mbuf_setlen(m2, mbuf_len(m2) + xfer);
siz -= xfer;
left -= xfer;
if (siz == 0 && rem) {
if (left < rem)
panic("nfsm_strtom");
NFSBZERO(cp2 + xfer, rem);
mbuf_setlen(m2, mbuf_len(m2) + rem);
}
}
nd->nd_mb = m2;
nd->nd_bpos = NFSMTOD(m2, caddr_t) + mbuf_len(m2);
return (bytesize);
}
/*
* copies a uio scatter/gather list to an mbuf chain.
* NOTE: can ony handle iovcnt == 1
*/
APPLESTATIC void
nfsm_uiombuf(struct nfsrv_descript *nd, struct uio *uiop, int siz)
{
char *uiocp;
struct mbuf *mp, *mp2;
int xfer, left, mlen;
int uiosiz, clflg, rem;
char *cp, *tcp;
KASSERT(uiop->uio_iovcnt == 1, ("nfsm_uiotombuf: iovcnt != 1"));
if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */
clflg = 1;
else
clflg = 0;
rem = NFSM_RNDUP(siz) - siz;
mp = mp2 = nd->nd_mb;
while (siz > 0) {
left = uiop->uio_iov->iov_len;
uiocp = uiop->uio_iov->iov_base;
if (left > siz)
left = siz;
uiosiz = left;
while (left > 0) {
mlen = M_TRAILINGSPACE(mp);
if (mlen == 0) {
if (clflg)
NFSMCLGET(mp, M_WAITOK);
else
NFSMGET(mp);
mbuf_setlen(mp, 0);
mbuf_setnext(mp2, mp);
mp2 = mp;
mlen = M_TRAILINGSPACE(mp);
}
xfer = (left > mlen) ? mlen : left;
#ifdef notdef
/* Not Yet.. */
if (uiop->uio_iov->iov_op != NULL)
(*(uiop->uio_iov->iov_op))
(uiocp, NFSMTOD(mp, caddr_t) + mbuf_len(mp),
xfer);
else
#endif
if (uiop->uio_segflg == UIO_SYSSPACE)
NFSBCOPY(uiocp, NFSMTOD(mp, caddr_t) + mbuf_len(mp),
xfer);
else
copyin(CAST_USER_ADDR_T(uiocp), NFSMTOD(mp, caddr_t)
+ mbuf_len(mp), xfer);
mbuf_setlen(mp, mbuf_len(mp) + xfer);
left -= xfer;
uiocp += xfer;
uiop->uio_offset += xfer;
uiop->uio_resid -= xfer;
}
tcp = (char *)uiop->uio_iov->iov_base;
tcp += uiosiz;
uiop->uio_iov->iov_base = (void *)tcp;
uiop->uio_iov->iov_len -= uiosiz;
siz -= uiosiz;
}
if (rem > 0) {
if (rem > M_TRAILINGSPACE(mp)) {
NFSMGET(mp);
mbuf_setlen(mp, 0);
mbuf_setnext(mp2, mp);
}
cp = NFSMTOD(mp, caddr_t) + mbuf_len(mp);
for (left = 0; left < rem; left++)
*cp++ = '\0';
mbuf_setlen(mp, mbuf_len(mp) + rem);
nd->nd_bpos = cp;
} else
nd->nd_bpos = NFSMTOD(mp, caddr_t) + mbuf_len(mp);
nd->nd_mb = mp;
}
/*
* copies a uio scatter/gather list to an mbuf chain.
* This version returns the mbuf list and does not use "nd".
* NOTE: can ony handle iovcnt == 1
*/
struct mbuf *
nfsm_uiombuflist(struct uio *uiop, int siz, struct mbuf **mbp, char **cpp)
{
char *uiocp;
struct mbuf *mp, *mp2, *firstmp;
int xfer, left, mlen;
int uiosiz, clflg;
char *tcp;
KASSERT(uiop->uio_iovcnt == 1, ("nfsm_uiotombuf: iovcnt != 1"));
if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */
clflg = 1;
else
clflg = 0;
if (clflg != 0)
NFSMCLGET(mp, M_WAITOK);
else
NFSMGET(mp);
mbuf_setlen(mp, 0);
firstmp = mp2 = mp;
while (siz > 0) {
left = uiop->uio_iov->iov_len;
uiocp = uiop->uio_iov->iov_base;
if (left > siz)
left = siz;
uiosiz = left;
while (left > 0) {
mlen = M_TRAILINGSPACE(mp);
if (mlen == 0) {
if (clflg)
NFSMCLGET(mp, M_WAITOK);
else
NFSMGET(mp);
mbuf_setlen(mp, 0);
mbuf_setnext(mp2, mp);
mp2 = mp;
mlen = M_TRAILINGSPACE(mp);
}
xfer = (left > mlen) ? mlen : left;
if (uiop->uio_segflg == UIO_SYSSPACE)
NFSBCOPY(uiocp, NFSMTOD(mp, caddr_t) +
mbuf_len(mp), xfer);
else
copyin(uiocp, NFSMTOD(mp, caddr_t) +
mbuf_len(mp), xfer);
mbuf_setlen(mp, mbuf_len(mp) + xfer);
left -= xfer;
uiocp += xfer;
uiop->uio_offset += xfer;
uiop->uio_resid -= xfer;
}
tcp = (char *)uiop->uio_iov->iov_base;
tcp += uiosiz;
uiop->uio_iov->iov_base = (void *)tcp;
uiop->uio_iov->iov_len -= uiosiz;
siz -= uiosiz;
}
if (cpp != NULL)
*cpp = NFSMTOD(mp, caddr_t) + mbuf_len(mp);
if (mbp != NULL)
*mbp = mp;
return (firstmp);
}
