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-rw-r--r--sys/nfs/nfs_common.c407
1 files changed, 0 insertions, 407 deletions
diff --git a/sys/nfs/nfs_common.c b/sys/nfs/nfs_common.c
deleted file mode 100644
index ad9e7a1..0000000
--- a/sys/nfs/nfs_common.c
+++ /dev/null
@@ -1,407 +0,0 @@
-/*-
- * Copyright (c) 1989, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Rick Macklem at The University of Guelph.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-/*
- * These functions support the macros and help fiddle mbuf chains for
- * the nfs op functions. They do things like create the rpc header and
- * copy data between mbuf chains and uio lists.
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/bio.h>
-#include <sys/buf.h>
-#include <sys/proc.h>
-#include <sys/mount.h>
-#include <sys/vnode.h>
-#include <sys/namei.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/malloc.h>
-#include <sys/module.h>
-#include <sys/sysent.h>
-#include <sys/syscall.h>
-#include <sys/sysctl.h>
-
-#include <vm/vm.h>
-#include <vm/vm_object.h>
-#include <vm/vm_extern.h>
-
-#include <nfs/nfsproto.h>
-#include <nfsserver/nfs.h>
-#include <nfs/xdr_subs.h>
-#include <nfs/nfs_common.h>
-
-#include <netinet/in.h>
-
-enum vtype nv3tov_type[8]= {
- VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO
-};
-nfstype nfsv3_type[9] = {
- NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, NFFIFO, NFNON
-};
-
-static void *nfsm_dissect_xx_sub(int s, struct mbuf **md, caddr_t *dpos,
- int how);
-
-SYSCTL_NODE(_vfs, OID_AUTO, nfs_common, CTLFLAG_RD, 0, "NFS common support");
-
-static int nfs_realign_test;
-SYSCTL_INT(_vfs_nfs_common, OID_AUTO, realign_test, CTLFLAG_RD,
- &nfs_realign_test, 0, "Number of realign tests done");
-
-static int nfs_realign_count;
-SYSCTL_INT(_vfs_nfs_common, OID_AUTO, realign_count, CTLFLAG_RD,
- &nfs_realign_count, 0, "Number of mbuf realignments done");
-
-/*
- * copies mbuf chain to the uio scatter/gather list
- */
-int
-nfsm_mbuftouio(struct mbuf **mrep, struct uio *uiop, int siz, caddr_t *dpos)
-{
- char *mbufcp, *uiocp;
- int xfer, left, len;
- struct mbuf *mp;
- long uiosiz, rem;
- int error = 0;
-
- mp = *mrep;
- mbufcp = *dpos;
- len = mtod(mp, caddr_t)+mp->m_len-mbufcp;
- rem = nfsm_rndup(siz)-siz;
- while (siz > 0) {
- if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
- return (EFBIG);
- left = uiop->uio_iov->iov_len;
- uiocp = uiop->uio_iov->iov_base;
- if (left > siz)
- left = siz;
- uiosiz = left;
- while (left > 0) {
- while (len == 0) {
- mp = mp->m_next;
- if (mp == NULL)
- return (EBADRPC);
- mbufcp = mtod(mp, caddr_t);
- len = mp->m_len;
- }
- xfer = (left > len) ? len : left;
-#ifdef notdef
- /* Not Yet.. */
- if (uiop->uio_iov->iov_op != NULL)
- (*(uiop->uio_iov->iov_op))
- (mbufcp, uiocp, xfer);
- else
-#endif
- if (uiop->uio_segflg == UIO_SYSSPACE)
- bcopy(mbufcp, uiocp, xfer);
- else
- copyout(mbufcp, uiocp, xfer);
- left -= xfer;
- len -= xfer;
- mbufcp += xfer;
- uiocp += xfer;
- uiop->uio_offset += xfer;
- uiop->uio_resid -= xfer;
- }
- if (uiop->uio_iov->iov_len <= siz) {
- uiop->uio_iovcnt--;
- uiop->uio_iov++;
- } else {
- uiop->uio_iov->iov_base =
- (char *)uiop->uio_iov->iov_base + uiosiz;
- uiop->uio_iov->iov_len -= uiosiz;
- }
- siz -= uiosiz;
- }
- *dpos = mbufcp;
- *mrep = mp;
- if (rem > 0) {
- if (len < rem)
- error = nfs_adv(mrep, dpos, rem, len);
- else
- *dpos += rem;
- }
- return (error);
-}
-
-/*
- * Help break down an mbuf chain by setting the first siz bytes contiguous
- * pointed to by returned val.
- * This is used by the macros nfsm_dissect for tough
- * cases. (The macros use the vars. dpos and dpos2)
- */
-void *
-nfsm_disct(struct mbuf **mdp, caddr_t *dposp, int siz, int left, int how)
-{
- struct mbuf *mp, *mp2;
- int siz2, xfer;
- caddr_t ptr, npos = NULL;
- void *ret;
-
- mp = *mdp;
- while (left == 0) {
- *mdp = mp = mp->m_next;
- if (mp == NULL)
- return (NULL);
- left = mp->m_len;
- *dposp = mtod(mp, caddr_t);
- }
- if (left >= siz) {
- ret = *dposp;
- *dposp += siz;
- } else if (mp->m_next == NULL) {
- return (NULL);
- } else if (siz > MHLEN) {
- panic("nfs S too big");
- } else {
- mp2 = m_get(how, MT_DATA);
- if (mp2 == NULL)
- return (NULL);
- mp2->m_len = siz;
- mp2->m_next = mp->m_next;
- mp->m_next = mp2;
- mp->m_len -= left;
- mp = mp2;
- ptr = mtod(mp, caddr_t);
- ret = ptr;
- bcopy(*dposp, ptr, left); /* Copy what was left */
- siz2 = siz-left;
- ptr += left;
- mp2 = mp->m_next;
- npos = mtod(mp2, caddr_t);
- /* Loop around copying up the siz2 bytes */
- while (siz2 > 0) {
- if (mp2 == NULL)
- return (NULL);
- xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2;
- if (xfer > 0) {
- bcopy(mtod(mp2, caddr_t), ptr, xfer);
- mp2->m_data += xfer;
- mp2->m_len -= xfer;
- ptr += xfer;
- siz2 -= xfer;
- }
- if (siz2 > 0) {
- mp2 = mp2->m_next;
- if (mp2 != NULL)
- npos = mtod(mp2, caddr_t);
- }
- }
- *mdp = mp2;
- *dposp = mtod(mp2, caddr_t);
- if (!nfsm_aligned(*dposp, u_int32_t)) {
- bcopy(*dposp, npos, mp2->m_len);
- mp2->m_data = npos;
- *dposp = npos;
- }
- }
- return (ret);
-}
-
-/*
- * Advance the position in the mbuf chain.
- */
-int
-nfs_adv(struct mbuf **mdp, caddr_t *dposp, int offs, int left)
-{
- struct mbuf *m;
- int s;
-
- m = *mdp;
- s = left;
- while (s < offs) {
- offs -= s;
- m = m->m_next;
- if (m == NULL)
- return (EBADRPC);
- s = m->m_len;
- }
- *mdp = m;
- *dposp = mtod(m, caddr_t)+offs;
- return (0);
-}
-
-void *
-nfsm_build_xx(int s, struct mbuf **mb, caddr_t *bpos)
-{
- struct mbuf *mb2;
- void *ret;
-
- if (s > M_TRAILINGSPACE(*mb)) {
- mb2 = m_get(M_WAITOK, MT_DATA);
- if (s > MLEN)
- panic("build > MLEN");
- (*mb)->m_next = mb2;
- *mb = mb2;
- (*mb)->m_len = 0;
- *bpos = mtod(*mb, caddr_t);
- }
- ret = *bpos;
- (*mb)->m_len += s;
- *bpos += s;
- return (ret);
-}
-
-void *
-nfsm_dissect_xx(int s, struct mbuf **md, caddr_t *dpos)
-{
-
- return (nfsm_dissect_xx_sub(s, md, dpos, M_WAITOK));
-}
-
-void *
-nfsm_dissect_xx_nonblock(int s, struct mbuf **md, caddr_t *dpos)
-{
-
- return (nfsm_dissect_xx_sub(s, md, dpos, M_NOWAIT));
-}
-
-static void *
-nfsm_dissect_xx_sub(int s, struct mbuf **md, caddr_t *dpos, int how)
-{
- int t1;
- char *cp2;
- void *ret;
-
- t1 = mtod(*md, caddr_t) + (*md)->m_len - *dpos;
- if (t1 >= s) {
- ret = *dpos;
- *dpos += s;
- return (ret);
- }
- cp2 = nfsm_disct(md, dpos, s, t1, how);
- return (cp2);
-}
-
-int
-nfsm_strsiz_xx(int *s, int m, struct mbuf **mb, caddr_t *bpos)
-{
- u_int32_t *tl;
-
- tl = nfsm_dissect_xx(NFSX_UNSIGNED, mb, bpos);
- if (tl == NULL)
- return (EBADRPC);
- *s = fxdr_unsigned(int32_t, *tl);
- if (*s > m)
- return (EBADRPC);
- return (0);
-}
-
-int
-nfsm_adv_xx(int s, struct mbuf **md, caddr_t *dpos)
-{
- int t1;
-
- t1 = mtod(*md, caddr_t) + (*md)->m_len - *dpos;
- if (t1 >= s) {
- *dpos += s;
- return (0);
- }
- t1 = nfs_adv(md, dpos, s, t1);
- if (t1)
- return (t1);
- return (0);
-}
-
-/*
- * Check for badly aligned mbuf data and realign by copying the unaligned
- * portion of the data into a new mbuf chain and freeing the portions of the
- * old chain that were replaced.
- *
- * We cannot simply realign the data within the existing mbuf chain because
- * the underlying buffers may contain other rpc commands and we cannot afford
- * to overwrite them.
- *
- * We would prefer to avoid this situation entirely. The situation does not
- * occur with NFS/UDP and is supposed to only occassionally occur with TCP.
- * Use vfs.nfs_common.realign_count and realign_test to check this.
- */
-int
-nfs_realign(struct mbuf **pm, int how)
-{
- struct mbuf *m, *n;
- int off;
-
- ++nfs_realign_test;
- while ((m = *pm) != NULL) {
- if (!nfsm_aligned(m->m_len, u_int32_t) ||
- !nfsm_aligned(mtod(m, intptr_t), u_int32_t)) {
- /*
- * NB: we can't depend on m_pkthdr.len to help us
- * decide what to do here. May not be worth doing
- * the m_length calculation as m_copyback will
- * expand the mbuf chain below as needed.
- */
- if (m_length(m, NULL) >= MINCLSIZE) {
- /* NB: m_copyback handles space > MCLBYTES */
- n = m_getcl(how, MT_DATA, 0);
- } else
- n = m_get(how, MT_DATA);
- if (n == NULL)
- return (ENOMEM);
- /*
- * Align the remainder of the mbuf chain.
- */
- n->m_len = 0;
- off = 0;
- while (m != NULL) {
- m_copyback(n, off, m->m_len, mtod(m, caddr_t));
- off += m->m_len;
- m = m->m_next;
- }
- m_freem(*pm);
- *pm = n;
- ++nfs_realign_count;
- break;
- }
- pm = &m->m_next;
- }
- return (0);
-}
-
-static moduledata_t nfs_common_mod = {
- "nfs_common",
- NULL,
- NULL
-};
-
-DECLARE_MODULE(nfs_common, nfs_common_mod, SI_SUB_VFS, SI_ORDER_ANY);
-MODULE_VERSION(nfs_common, 1);
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