/* $NetBSD: nfs_commonsubs.c,v 1.7 2024/07/05 04:31:52 rin Exp $ */
/*-
* 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.
*
*/
/*
* 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.
*/
#ifndef APPLEKEXT
#ifdef _KERNEL_OPT
#include "opt_inet6.h"
#include "opt_quota.h"
#endif
#include <fs/nfs/common/nfsport.h>
#include <security/mac/mac_framework.h>
/*
* Data items converted to xdr at startup, since they are constant
* This is kinda hokey, but may save a little time doing byte swaps
*/
u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1;
/* And other global data */
nfstype nfsv34_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK,
NFFIFO, NFNON };
enum vtype newnv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON };
enum vtype nv34tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO };
struct timeval nfsboottime; /* Copy boottime once, so it never changes */
int nfscl_ticks;
int nfsrv_useacl = 1;
struct nfssockreq nfsrv_nfsuserdsock;
int nfsrv_nfsuserd = 0;
struct nfsreqhead nfsd_reqq;
uid_t nfsrv_defaultuid;
gid_t nfsrv_defaultgid;
int nfsrv_lease = NFSRV_LEASE;
int ncl_mbuf_mlen = MLEN;
int nfsd_enable_stringtouid = 0;
NFSNAMEIDMUTEX;
NFSSOCKMUTEX;
extern int nfsrv_lughashsize;
/*
* This static array indicates whether or not the RPC generates a large
* reply. This is used by nfs_reply() to decide whether or not an mbuf
* cluster should be allocated. (If a cluster is required by an RPC
* marked 0 in this array, the code will still work, just not quite as
* efficiently.)
*/
int nfs_bigreply[NFSV41_NPROCS] = { 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 };
/* local functions */
static int nfsrv_skipace(struct nfsrv_descript *nd, int *acesizep);
static void nfsv4_wanted(struct nfsv4lock *lp);
static int nfsrv_cmpmixedcase(u_char *cp, u_char *cp2, int len);
static int nfsrv_getuser(int procnum, uid_t uid, gid_t gid, char *name,
NFSPROC_T *p);
static void nfsrv_removeuser(struct nfsusrgrp *usrp, int isuser);
static int nfsrv_getrefstr(struct nfsrv_descript *, u_char **, u_char **,
int *, int *);
static void nfsrv_refstrbigenough(int, u_char **, u_char **, int *);
#ifndef APPLE
/*
* copies mbuf chain to the uio scatter/gather list
*/
int
nfsm_mbufuio(struct nfsrv_descript *nd, struct uio *uiop, int siz)
{
char *mbufcp, *uiocp;
int xfer, left, len;
mbuf_t mp;
long uiosiz, rem;
int error = 0;
mp = nd->nd_md;
mbufcp = nd->nd_dpos;
len = NFSMTOD(mp, caddr_t) + mbuf_len(mp) - mbufcp;
rem = NFSM_RNDUP(siz) - siz;
while (siz > 0) {
if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) {
error = EBADRPC;
goto out;
}
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 = mbuf_next(mp);
if (mp == NULL) {
error = EBADRPC;
goto out;
}
mbufcp = NFSMTOD(mp, caddr_t);
len = mbuf_len(mp);
KASSERT(len >= 0,
("len %d, corrupted mbuf?", 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)
NFSBCOPY(mbufcp, uiocp, xfer);
else
copyout(mbufcp, CAST_USER_ADDR_T(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 = (void *)
((char *)uiop->uio_iov->iov_base + uiosiz);
uiop->uio_iov->iov_len -= uiosiz;
}
siz -= uiosiz;
}
nd->nd_dpos = mbufcp;
nd->nd_md = mp;
if (rem > 0) {
if (len < rem)
error = nfsm_advance(nd, rem, len);
else
nd->nd_dpos += rem;
}
/*
* Help break down an mbuf chain by setting the first siz bytes contiguous
* pointed to by returned val.
* This is used by the macro NFSM_DISSECT for tough
* cases.
*/
APPLESTATIC void *
nfsm_dissct(struct nfsrv_descript *nd, int siz, int how)
{
mbuf_t mp2;
int siz2, xfer;
caddr_t p;
int left;
caddr_t retp;
retp = NULL;
left = NFSMTOD(nd->nd_md, caddr_t) + mbuf_len(nd->nd_md) - nd->nd_dpos;
while (left == 0) {
nd->nd_md = mbuf_next(nd->nd_md);
if (nd->nd_md == NULL)
return (retp);
left = mbuf_len(nd->nd_md);
nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
}
if (left >= siz) {
retp = nd->nd_dpos;
nd->nd_dpos += siz;
} else if (mbuf_next(nd->nd_md) == NULL) {
return (retp);
} else if (siz > ncl_mbuf_mhlen) {
panic("nfs S too big");
} else {
MGET(mp2, how, MT_DATA);
if (mp2 == NULL)
return (NULL);
mbuf_setnext(mp2, mbuf_next(nd->nd_md));
mbuf_setnext(nd->nd_md, mp2);
mbuf_setlen(nd->nd_md, mbuf_len(nd->nd_md) - left);
nd->nd_md = mp2;
retp = p = NFSMTOD(mp2, caddr_t);
NFSBCOPY(nd->nd_dpos, p, left); /* Copy what was left */
siz2 = siz - left;
p += left;
mp2 = mbuf_next(mp2);
/* Loop around copying up the siz2 bytes */
while (siz2 > 0) {
if (mp2 == NULL)
return (NULL);
xfer = (siz2 > mbuf_len(mp2)) ? mbuf_len(mp2) : siz2;
if (xfer > 0) {
NFSBCOPY(NFSMTOD(mp2, caddr_t), p, xfer);
NFSM_DATAP(mp2, xfer);
mbuf_setlen(mp2, mbuf_len(mp2) - xfer);
p += xfer;
siz2 -= xfer;
}
if (siz2 > 0)
mp2 = mbuf_next(mp2);
}
mbuf_setlen(nd->nd_md, siz);
nd->nd_md = mp2;
nd->nd_dpos = NFSMTOD(mp2, caddr_t);
}
return (retp);
}
/*
* Advance the position in the mbuf chain.
* If offs == 0, this is a no-op, but it is simpler to just return from
* here than check for offs > 0 for all calls to nfsm_advance.
* If left == -1, it should be calculated here.
*/
APPLESTATIC int
nfsm_advance(struct nfsrv_descript *nd, int offs, int left)
{
int error = 0;
if (offs == 0)
goto out;
/*
* A negative offs should be considered a serious problem.
*/
if (offs < 0)
panic("nfsrv_advance");
/*
* If left == -1, calculate it here.
*/
if (left == -1)
left = NFSMTOD(nd->nd_md, caddr_t) + mbuf_len(nd->nd_md) -
nd->nd_dpos;
/*
* Loop around, advancing over the mbuf data.
*/
while (offs > left) {
offs -= left;
nd->nd_md = mbuf_next(nd->nd_md);
if (nd->nd_md == NULL) {
error = EBADRPC;
goto out;
}
left = mbuf_len(nd->nd_md);
nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
}
nd->nd_dpos += offs;
out:
NFSEXITCODE(error);
return (error);
}
/*
* 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);
}
/*
* Called once to initialize data structures...
*/
APPLESTATIC void
newnfs_init(void)
{
static int nfs_inited = 0;
/*
* Initialize reply list and start timer
*/
TAILQ_INIT(&nfsd_reqq);
NFS_TIMERINIT;
}
/*
* Put a file handle in an mbuf list.
* If the size argument == 0, just use the default size.
* set_true == 1 if there should be an newnfs_true prepended on the file handle.
* Return the number of bytes output, including XDR overhead.
*/
APPLESTATIC int
nfsm_fhtom(struct nfsrv_descript *nd, u_int8_t *fhp, int size, int set_true)
{
u_int32_t *tl;
u_int8_t *cp;
int fullsiz, rem, bytesize = 0;
/*
* This function compares two net addresses by family and returns TRUE
* if they are the same host.
* If there is any doubt, return FALSE.
* The AF_INET family is handled as a special case so that address mbufs
* don't need to be saved to store "struct in_addr", which is only 4 bytes.
*/
APPLESTATIC int
nfsaddr_match(int family, union nethostaddr *haddr, NFSSOCKADDR_T nam)
{
struct sockaddr_in *inetaddr;
switch (family) {
case AF_INET:
inetaddr = NFSSOCKADDR(nam, struct sockaddr_in *);
if (inetaddr->sin_family == AF_INET &&
inetaddr->sin_addr.s_addr == haddr->had_inet.s_addr)
return (1);
break;
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *inetaddr6;
inetaddr6 = NFSSOCKADDR(nam, struct sockaddr_in6 *);
/* XXX - should test sin6_scope_id ? */
if (inetaddr6->sin6_family == AF_INET6 &&
IN6_ARE_ADDR_EQUAL(&inetaddr6->sin6_addr,
&haddr->had_inet6))
return (1);
}
break;
#endif
}
return (0);
}
/*
* Similar to the above, but takes to NFSSOCKADDR_T args.
*/
APPLESTATIC int
nfsaddr2_match(NFSSOCKADDR_T nam1, NFSSOCKADDR_T nam2)
{
struct sockaddr_in *addr1, *addr2;
struct sockaddr *inaddr;
/*
* Trim the stuff already dissected off the mbuf list.
*/
APPLESTATIC void
newnfs_trimleading(nd)
struct nfsrv_descript *nd;
{
mbuf_t m, n;
int offs;
/*
* First, free up leading mbufs.
*/
if (nd->nd_mrep != nd->nd_md) {
m = nd->nd_mrep;
while (mbuf_next(m) != nd->nd_md) {
if (mbuf_next(m) == NULL)
panic("nfsm trim leading");
m = mbuf_next(m);
}
mbuf_setnext(m, NULL);
mbuf_freem(nd->nd_mrep);
}
m = nd->nd_md;
/*
* Now, adjust this mbuf, based on nd_dpos.
*/
offs = nd->nd_dpos - NFSMTOD(m, caddr_t);
if (offs == mbuf_len(m)) {
n = m;
m = mbuf_next(m);
if (m == NULL)
panic("nfsm trim leading2");
mbuf_setnext(n, NULL);
mbuf_freem(n);
} else if (offs > 0) {
mbuf_setlen(m, mbuf_len(m) - offs);
NFSM_DATAP(m, offs);
} else if (offs < 0)
panic("nfsm trimleading offs");
nd->nd_mrep = m;
nd->nd_md = m;
nd->nd_dpos = NFSMTOD(m, caddr_t);
}
/*
* Trim trailing data off the mbuf list being built.
*/
APPLESTATIC void
newnfs_trimtrailing(nd, mb, bpos)
struct nfsrv_descript *nd;
mbuf_t mb;
caddr_t bpos;
{
/*
* Break down the nfsv4 acl.
* If the aclp == NULL or won't fit in an acl, just discard the acl info.
*/
APPLESTATIC int
nfsrv_dissectacl(struct nfsrv_descript *nd, NFSACL_T *aclp, int *aclerrp,
int *aclsizep, __unused NFSPROC_T *p)
{
u_int32_t *tl;
int i, aclsize;
int acecnt, error = 0, aceerr = 0, acesize;
*aclerrp = 0;
if (aclp)
aclp->acl_cnt = 0;
/*
* Parse out the ace entries and expect them to conform to
* what can be supported by R/W/X bits.
*/
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
aclsize = NFSX_UNSIGNED;
acecnt = fxdr_unsigned(int, *tl);
if (acecnt > ACL_MAX_ENTRIES)
aceerr = NFSERR_ATTRNOTSUPP;
if (nfsrv_useacl == 0)
aceerr = NFSERR_ATTRNOTSUPP;
for (i = 0; i < acecnt; i++) {
if (aclp && !aceerr)
error = nfsrv_dissectace(nd, &aclp->acl_entry[i],
&aceerr, &acesize, p);
else
error = nfsrv_skipace(nd, &acesize);
if (error)
goto nfsmout;
aclsize += acesize;
}
if (aclp && !aceerr)
aclp->acl_cnt = acecnt;
if (aceerr)
*aclerrp = aceerr;
if (aclsizep)
*aclsizep = aclsize;
nfsmout:
NFSEXITCODE2(error, nd);
return (error);
}
/*
* Skip over an NFSv4 ace entry. Just dissect the xdr and discard it.
*/
static int
nfsrv_skipace(struct nfsrv_descript *nd, int *acesizep)
{
u_int32_t *tl;
int error, len = 0;
/*
* Get attribute bits from an mbuf list.
* Returns EBADRPC for a parsing error, 0 otherwise.
* If the clearinvalid flag is set, clear the bits not supported.
*/
APPLESTATIC int
nfsrv_getattrbits(struct nfsrv_descript *nd, nfsattrbit_t *attrbitp, int *cntp,
int *retnotsupp)
{
u_int32_t *tl;
int cnt, i, outcnt;
int error = 0;
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
cnt = fxdr_unsigned(int, *tl);
if (cnt < 0) {
error = NFSERR_BADXDR;
goto nfsmout;
}
if (cnt > NFSATTRBIT_MAXWORDS)
outcnt = NFSATTRBIT_MAXWORDS;
else
outcnt = cnt;
NFSZERO_ATTRBIT(attrbitp);
if (outcnt > 0) {
NFSM_DISSECT(tl, u_int32_t *, outcnt * NFSX_UNSIGNED);
for (i = 0; i < outcnt; i++)
attrbitp->bits[i] = fxdr_unsigned(u_int32_t, *tl++);
}
for (i = 0; i < (cnt - outcnt); i++) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (retnotsupp != NULL && *tl != 0)
*retnotsupp = NFSERR_ATTRNOTSUPP;
}
if (cntp)
*cntp = NFSX_UNSIGNED + (cnt * NFSX_UNSIGNED);
nfsmout:
NFSEXITCODE2(error, nd);
return (error);
}
/*
* Get the attributes for V4.
* If the compare flag is true, test for any attribute changes,
* otherwise return the attribute values.
* These attributes cover fields in "struct vattr", "struct statfs",
* "struct nfsfsinfo", the file handle and the lease duration.
* The value of retcmpp is set to 1 if all attributes are the same,
* and 0 otherwise.
* Returns EBADRPC if it can't be parsed, 0 otherwise.
*/
APPLESTATIC int
nfsv4_loadattr(struct nfsrv_descript *nd, vnode_t vp,
struct nfsvattr *nap, struct nfsfh **nfhpp, fhandle_t *fhp, int fhsize,
struct nfsv3_pathconf *pc, struct statfs *sbp, struct nfsstatfs *sfp,
struct nfsfsinfo *fsp, NFSACL_T *aclp, int compare, int *retcmpp,
u_int32_t *leasep, u_int32_t *rderrp, NFSPROC_T *p, struct ucred *cred)
{
u_int32_t *tl;
int i = 0, j, k, l = 0, m, bitpos, attrsum = 0;
int error, tfhsize, aceerr, attrsize, cnt, retnotsup;
u_char *cp, *cp2, namestr[NFSV4_SMALLSTR + 1];
nfsattrbit_t attrbits, retattrbits, checkattrbits;
struct nfsfh *tnfhp;
struct nfsreferral *refp;
u_quad_t tquad;
nfsquad_t tnfsquad;
struct timespec temptime;
uid_t uid;
gid_t gid;
long fid;
u_int32_t freenum = 0, tuint;
u_int64_t uquad = 0, thyp, thyp2;
#ifdef QUOTA
struct dqblk dqb;
uid_t savuid;
#endif
static struct timeval last64fileid;
static size_t count64fileid;
static struct timeval last64mountfileid;
static size_t count64mountfileid;
static struct timeval warninterval = { 60, 0 };
attrsum += cnt;
break;
case NFSATTRBIT_ACLSUPPORT:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare && !(*retcmpp)) {
if (nfsrv_useacl && nfs_supportsnfsv4acls(vp)) {
if (fxdr_unsigned(u_int32_t, *tl) !=
NFSV4ACE_SUPTYPES)
*retcmpp = NFSERR_NOTSAME;
} else {
*retcmpp = NFSERR_ATTRNOTSUPP;
}
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_ARCHIVE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare && !(*retcmpp))
*retcmpp = NFSERR_ATTRNOTSUPP;
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_CANSETTIME:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (fsp->fs_properties & NFSV3_FSFCANSETTIME) {
if (*tl == newnfs_false)
*retcmpp = NFSERR_NOTSAME;
} else {
if (*tl == newnfs_true)
*retcmpp = NFSERR_NOTSAME;
}
}
} else if (fsp != NULL) {
if (*tl == newnfs_true)
fsp->fs_properties |= NFSV3_FSFCANSETTIME;
else
fsp->fs_properties &= ~NFSV3_FSFCANSETTIME;
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_CASEINSENSITIVE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (*tl != newnfs_false)
*retcmpp = NFSERR_NOTSAME;
}
} else if (pc != NULL) {
pc->pc_caseinsensitive =
fxdr_unsigned(u_int32_t, *tl);
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_CASEPRESERVING:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (*tl != newnfs_true)
*retcmpp = NFSERR_NOTSAME;
}
} else if (pc != NULL) {
pc->pc_casepreserving =
fxdr_unsigned(u_int32_t, *tl);
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_CHOWNRESTRICTED:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (*tl != newnfs_true)
*retcmpp = NFSERR_NOTSAME;
}
} else if (pc != NULL) {
pc->pc_chownrestricted =
fxdr_unsigned(u_int32_t, *tl);
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_FILEHANDLE:
error = nfsm_getfh(nd, &tnfhp);
if (error)
goto nfsmout;
tfhsize = tnfhp->nfh_len;
if (compare) {
if (!(*retcmpp) &&
!NFSRV_CMPFH(tnfhp->nfh_fh, tfhsize,
fhp, fhsize))
*retcmpp = NFSERR_NOTSAME;
FREE((caddr_t)tnfhp, M_NFSFH);
} else if (nfhpp != NULL) {
*nfhpp = tnfhp;
} else {
FREE((caddr_t)tnfhp, M_NFSFH);
}
attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(tfhsize));
break;
case NFSATTRBIT_FILEID:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
thyp = fxdr_hyper(tl);
if (compare) {
if (!(*retcmpp)) {
if ((u_int64_t)nap->na_fileid != thyp)
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
if (*tl++) {
count64fileid++;
if (ratecheck(&last64fileid, &warninterval)) {
printf("NFSv4 fileid > 32bits (%zu occurrences)\n",
count64fileid);
count64fileid = 0;
}
}
nap->na_fileid = thyp;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_FILESAVAIL:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (compare) {
if (!(*retcmpp) &&
sfp->sf_afiles != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
} else if (sfp != NULL) {
sfp->sf_afiles = fxdr_hyper(tl);
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_FILESFREE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (compare) {
if (!(*retcmpp) &&
sfp->sf_ffiles != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
} else if (sfp != NULL) {
sfp->sf_ffiles = fxdr_hyper(tl);
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_FILESTOTAL:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (compare) {
if (!(*retcmpp) &&
sfp->sf_tfiles != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
} else if (sfp != NULL) {
sfp->sf_tfiles = fxdr_hyper(tl);
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_FSLOCATIONS:
error = nfsrv_getrefstr(nd, &cp, &cp2, &l, &m);
if (error)
goto nfsmout;
attrsum += l;
if (compare && !(*retcmpp)) {
refp = nfsv4root_getreferral(vp, NULL, 0);
if (refp != NULL) {
if (cp == NULL || cp2 == NULL ||
strcmp(cp, "/") ||
strcmp(cp2, refp->nfr_srvlist))
*retcmpp = NFSERR_NOTSAME;
} else if (m == 0) {
*retcmpp = NFSERR_NOTSAME;
}
}
if (cp != NULL)
free(cp, M_NFSSTRING);
if (cp2 != NULL)
free(cp2, M_NFSSTRING);
break;
case NFSATTRBIT_HIDDEN:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare && !(*retcmpp))
*retcmpp = NFSERR_ATTRNOTSUPP;
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_HOMOGENEOUS:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (fsp->fs_properties &
NFSV3_FSFHOMOGENEOUS) {
if (*tl == newnfs_false)
*retcmpp = NFSERR_NOTSAME;
} else {
if (*tl == newnfs_true)
*retcmpp = NFSERR_NOTSAME;
}
}
} else if (fsp != NULL) {
if (*tl == newnfs_true)
fsp->fs_properties |= NFSV3_FSFHOMOGENEOUS;
else
fsp->fs_properties &= ~NFSV3_FSFHOMOGENEOUS;
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_MAXFILESIZE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
tnfsquad.qval = fxdr_hyper(tl);
if (compare) {
if (!(*retcmpp)) {
tquad = NFSRV_MAXFILESIZE;
if (tquad != tnfsquad.qval)
*retcmpp = NFSERR_NOTSAME;
}
} else if (fsp != NULL) {
fsp->fs_maxfilesize = tnfsquad.qval;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_MAXLINK:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (fxdr_unsigned(int, *tl) != LINK_MAX)
*retcmpp = NFSERR_NOTSAME;
}
} else if (pc != NULL) {
pc->pc_linkmax = fxdr_unsigned(u_int32_t, *tl);
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_MAXNAME:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (fsp->fs_maxname !=
fxdr_unsigned(u_int32_t, *tl))
*retcmpp = NFSERR_NOTSAME;
}
} else {
tuint = fxdr_unsigned(u_int32_t, *tl);
/*
* Some Linux NFSv4 servers report this
* as 0 or 4billion, so I'll set it to
* NFS_MAXNAMLEN. If a server actually creates
* a name longer than NFS_MAXNAMLEN, it will
* get an error back.
*/
if (tuint == 0 || tuint > NFS_MAXNAMLEN)
tuint = NFS_MAXNAMLEN;
if (fsp != NULL)
fsp->fs_maxname = tuint;
if (pc != NULL)
pc->pc_namemax = tuint;
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_MAXREAD:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (compare) {
if (!(*retcmpp)) {
if (fsp->fs_rtmax != fxdr_unsigned(u_int32_t,
*(tl + 1)) || *tl != 0)
*retcmpp = NFSERR_NOTSAME;
}
} else if (fsp != NULL) {
fsp->fs_rtmax = fxdr_unsigned(u_int32_t, *++tl);
fsp->fs_rtpref = fsp->fs_rtmax;
fsp->fs_dtpref = fsp->fs_rtpref;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_MAXWRITE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (compare) {
if (!(*retcmpp)) {
if (fsp->fs_wtmax != fxdr_unsigned(u_int32_t,
*(tl + 1)) || *tl != 0)
*retcmpp = NFSERR_NOTSAME;
}
} else if (fsp != NULL) {
fsp->fs_wtmax = fxdr_unsigned(int, *++tl);
fsp->fs_wtpref = fsp->fs_wtmax;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_MIMETYPE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
i = fxdr_unsigned(int, *tl);
attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i));
error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
if (error)
goto nfsmout;
if (compare && !(*retcmpp))
*retcmpp = NFSERR_ATTRNOTSUPP;
break;
case NFSATTRBIT_MODE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (nap->na_mode != nfstov_mode(*tl))
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
nap->na_mode = nfstov_mode(*tl);
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_NOTRUNC:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare) {
if (!(*retcmpp)) {
if (*tl != newnfs_true)
*retcmpp = NFSERR_NOTSAME;
}
} else if (pc != NULL) {
pc->pc_notrunc = fxdr_unsigned(u_int32_t, *tl);
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_NUMLINKS:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
tuint = fxdr_unsigned(u_int32_t, *tl);
if (compare) {
if (!(*retcmpp)) {
if ((u_int32_t)nap->na_nlink != tuint)
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
nap->na_nlink = tuint;
}
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_OWNER:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
j = fxdr_unsigned(int, *tl);
if (j < 0) {
error = NFSERR_BADXDR;
goto nfsmout;
}
attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
if (j > NFSV4_SMALLSTR)
cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
else
cp = namestr;
error = nfsrv_mtostr(nd, cp, j);
if (error) {
if (j > NFSV4_SMALLSTR)
free(cp, M_NFSSTRING);
goto nfsmout;
}
if (compare) {
if (!(*retcmpp)) {
if (nfsv4_strtouid(nd, cp, j, &uid, p) ||
nap->na_uid != uid)
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
if (nfsv4_strtouid(nd, cp, j, &uid, p))
nap->na_uid = nfsrv_defaultuid;
else
nap->na_uid = uid;
}
if (j > NFSV4_SMALLSTR)
free(cp, M_NFSSTRING);
break;
case NFSATTRBIT_OWNERGROUP:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
j = fxdr_unsigned(int, *tl);
if (j < 0) {
error = NFSERR_BADXDR;
goto nfsmout;
}
attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
if (j > NFSV4_SMALLSTR)
cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
else
cp = namestr;
error = nfsrv_mtostr(nd, cp, j);
if (error) {
if (j > NFSV4_SMALLSTR)
free(cp, M_NFSSTRING);
goto nfsmout;
}
if (compare) {
if (!(*retcmpp)) {
if (nfsv4_strtogid(nd, cp, j, &gid, p) ||
nap->na_gid != gid)
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
if (nfsv4_strtogid(nd, cp, j, &gid, p))
nap->na_gid = nfsrv_defaultgid;
else
nap->na_gid = gid;
}
if (j > NFSV4_SMALLSTR)
free(cp, M_NFSSTRING);
break;
case NFSATTRBIT_QUOTAHARD:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (sbp != NULL) {
if (priv_check_cred(cred, PRIV_VFS_EXCEEDQUOTA, 0))
freenum = sbp->f_bfree;
else
freenum = sbp->f_bavail;
#ifdef QUOTA
/*
* ufs_quotactl() insists that the uid argument
* equal p_ruid for non-root quota access, so
* we'll just make sure that's the case.
*/
savuid = p->p_cred->p_ruid;
p->p_cred->p_ruid = cred->cr_uid;
if (!VFS_QUOTACTL(vnode_mount(vp),QCMD(Q_GETQUOTA,
USRQUOTA), cred->cr_uid, (caddr_t)&dqb))
freenum = uimin(dqb.dqb_bhardlimit, freenum);
p->p_cred->p_ruid = savuid;
#endif /* QUOTA */
uquad = (u_int64_t)freenum;
NFSQUOTABLKTOBYTE(uquad, sbp->f_bsize);
}
if (compare && !(*retcmpp)) {
if (uquad != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_QUOTASOFT:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (sbp != NULL) {
if (priv_check_cred(cred, PRIV_VFS_EXCEEDQUOTA, 0))
freenum = sbp->f_bfree;
else
freenum = sbp->f_bavail;
#ifdef QUOTA
/*
* ufs_quotactl() insists that the uid argument
* equal p_ruid for non-root quota access, so
* we'll just make sure that's the case.
*/
savuid = p->p_cred->p_ruid;
p->p_cred->p_ruid = cred->cr_uid;
if (!VFS_QUOTACTL(vnode_mount(vp),QCMD(Q_GETQUOTA,
USRQUOTA), cred->cr_uid, (caddr_t)&dqb))
freenum = uimin(dqb.dqb_bsoftlimit, freenum);
p->p_cred->p_ruid = savuid;
#endif /* QUOTA */
uquad = (u_int64_t)freenum;
NFSQUOTABLKTOBYTE(uquad, sbp->f_bsize);
}
if (compare && !(*retcmpp)) {
if (uquad != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_QUOTAUSED:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (sbp != NULL) {
freenum = 0;
#ifdef QUOTA
/*
* ufs_quotactl() insists that the uid argument
* equal p_ruid for non-root quota access, so
* we'll just make sure that's the case.
*/
savuid = p->p_cred->p_ruid;
p->p_cred->p_ruid = cred->cr_uid;
if (!VFS_QUOTACTL(vnode_mount(vp),QCMD(Q_GETQUOTA,
USRQUOTA), cred->cr_uid, (caddr_t)&dqb))
freenum = dqb.dqb_curblocks;
p->p_cred->p_ruid = savuid;
#endif /* QUOTA */
uquad = (u_int64_t)freenum;
NFSQUOTABLKTOBYTE(uquad, sbp->f_bsize);
}
if (compare && !(*retcmpp)) {
if (uquad != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_RAWDEV:
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4SPECDATA);
j = fxdr_unsigned(int, *tl++);
k = fxdr_unsigned(int, *tl);
if (compare) {
if (!(*retcmpp)) {
if (nap->na_rdev != NFSMAKEDEV(j, k))
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
nap->na_rdev = NFSMAKEDEV(j, k);
}
attrsum += NFSX_V4SPECDATA;
break;
case NFSATTRBIT_SPACEAVAIL:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (compare) {
if (!(*retcmpp) &&
sfp->sf_abytes != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
} else if (sfp != NULL) {
sfp->sf_abytes = fxdr_hyper(tl);
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_SPACEFREE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (compare) {
if (!(*retcmpp) &&
sfp->sf_fbytes != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
} else if (sfp != NULL) {
sfp->sf_fbytes = fxdr_hyper(tl);
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_SPACETOTAL:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
if (compare) {
if (!(*retcmpp) &&
sfp->sf_tbytes != fxdr_hyper(tl))
*retcmpp = NFSERR_NOTSAME;
} else if (sfp != NULL) {
sfp->sf_tbytes = fxdr_hyper(tl);
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_SPACEUSED:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
thyp = fxdr_hyper(tl);
if (compare) {
if (!(*retcmpp)) {
if ((u_int64_t)nap->na_bytes != thyp)
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
nap->na_bytes = thyp;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_SYSTEM:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (compare && !(*retcmpp))
*retcmpp = NFSERR_ATTRNOTSUPP;
attrsum += NFSX_UNSIGNED;
break;
case NFSATTRBIT_TIMEACCESS:
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
fxdr_nfsv4time(tl, &temptime);
if (compare) {
if (!(*retcmpp)) {
if (!NFS_CMPTIME(temptime, nap->na_atime))
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
nap->na_atime = temptime;
}
attrsum += NFSX_V4TIME;
break;
case NFSATTRBIT_TIMEACCESSSET:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
attrsum += NFSX_UNSIGNED;
i = fxdr_unsigned(int, *tl);
if (i == NFSV4SATTRTIME_TOCLIENT) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
attrsum += NFSX_V4TIME;
}
if (compare && !(*retcmpp))
*retcmpp = NFSERR_INVAL;
break;
case NFSATTRBIT_TIMEBACKUP:
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
if (compare && !(*retcmpp))
*retcmpp = NFSERR_ATTRNOTSUPP;
attrsum += NFSX_V4TIME;
break;
case NFSATTRBIT_TIMECREATE:
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
if (compare && !(*retcmpp))
*retcmpp = NFSERR_ATTRNOTSUPP;
attrsum += NFSX_V4TIME;
break;
case NFSATTRBIT_TIMEDELTA:
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
if (fsp != NULL) {
if (compare) {
if (!(*retcmpp)) {
if ((u_int32_t)fsp->fs_timedelta.tv_sec !=
fxdr_unsigned(u_int32_t, *(tl + 1)) ||
(u_int32_t)fsp->fs_timedelta.tv_nsec !=
(fxdr_unsigned(u_int32_t, *(tl + 2)) %
1000000000) ||
*tl != 0)
*retcmpp = NFSERR_NOTSAME;
}
} else {
fxdr_nfsv4time(tl, &fsp->fs_timedelta);
}
}
attrsum += NFSX_V4TIME;
break;
case NFSATTRBIT_TIMEMETADATA:
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
fxdr_nfsv4time(tl, &temptime);
if (compare) {
if (!(*retcmpp)) {
if (!NFS_CMPTIME(temptime, nap->na_ctime))
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
nap->na_ctime = temptime;
}
attrsum += NFSX_V4TIME;
break;
case NFSATTRBIT_TIMEMODIFY:
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
fxdr_nfsv4time(tl, &temptime);
if (compare) {
if (!(*retcmpp)) {
if (!NFS_CMPTIME(temptime, nap->na_mtime))
*retcmpp = NFSERR_NOTSAME;
}
} else if (nap != NULL) {
nap->na_mtime = temptime;
}
attrsum += NFSX_V4TIME;
break;
case NFSATTRBIT_TIMEMODIFYSET:
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
attrsum += NFSX_UNSIGNED;
i = fxdr_unsigned(int, *tl);
if (i == NFSV4SATTRTIME_TOCLIENT) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
attrsum += NFSX_V4TIME;
}
if (compare && !(*retcmpp))
*retcmpp = NFSERR_INVAL;
break;
case NFSATTRBIT_MOUNTEDONFILEID:
NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
thyp = fxdr_hyper(tl);
if (compare) {
if (!(*retcmpp)) {
if (*tl++) {
*retcmpp = NFSERR_NOTSAME;
} else {
if (!vp || !nfsrv_atroot(vp, &fid))
fid = nap->na_fileid;
if ((u_int64_t)fid != thyp)
*retcmpp = NFSERR_NOTSAME;
}
}
} else if (nap != NULL) {
if (*tl++) {
count64mountfileid++;
if (ratecheck(&last64mountfileid, &warninterval)) {
printf("NFSv4 mounted on fileid > 32bits (%zu occurrences)\n",
count64mountfileid);
count64mountfileid = 0;
}
}
nap->na_mntonfileno = thyp;
}
attrsum += NFSX_HYPER;
break;
case NFSATTRBIT_SUPPATTREXCLCREAT:
retnotsup = 0;
error = nfsrv_getattrbits(nd, &retattrbits,
&cnt, &retnotsup);
if (error)
goto nfsmout;
if (compare && !(*retcmpp)) {
NFSSETSUPP_ATTRBIT(&checkattrbits);
NFSCLRNOTSETABLE_ATTRBIT(&checkattrbits);
NFSCLRBIT_ATTRBIT(&checkattrbits,
NFSATTRBIT_TIMEACCESSSET);
if (!NFSEQUAL_ATTRBIT(&retattrbits, &checkattrbits)
|| retnotsup)
*retcmpp = NFSERR_NOTSAME;
}
attrsum += cnt;
break;
default:
printf("EEK! nfsv4_loadattr unknown attr=%d\n",
bitpos);
if (compare && !(*retcmpp))
*retcmpp = NFSERR_ATTRNOTSUPP;
/*
* and get out of the loop, since we can't parse
* the unknown attribute data.
*/
bitpos = NFSATTRBIT_MAX;
break;
}
}
/*
* some clients pad the attrlist, so we need to skip over the
* padding.
*/
if (attrsum > attrsize) {
error = NFSERR_BADXDR;
} else {
attrsize = NFSM_RNDUP(attrsize);
if (attrsum < attrsize)
error = nfsm_advance(nd, attrsize - attrsum, -1);
}
nfsmout:
NFSEXITCODE2(error, nd);
return (error);
}
/*
* Implement sleep locks for newnfs. The nfslock_usecnt allows for a
* shared lock and the NFSXXX_LOCK flag permits an exclusive lock.
* The first argument is a pointer to an nfsv4lock structure.
* The second argument is 1 iff a blocking lock is wanted.
* If this argument is 0, the call waits until no thread either wants nor
* holds an exclusive lock.
* It returns 1 if the lock was acquired, 0 otherwise.
* If several processes call this function concurrently wanting the exclusive
* lock, one will get the lock and the rest will return without getting the
* lock. (If the caller must have the lock, it simply calls this function in a
* loop until the function returns 1 to indicate the lock was acquired.)
* Any usecnt must be decremented by calling nfsv4_relref() before
* calling nfsv4_lock(). It was done this way, so nfsv4_lock() could
* be called in a loop.
* The isleptp argument is set to indicate if the call slept, iff not NULL
* and the mp argument indicates to check for a forced dismount, iff not
* NULL.
*/
APPLESTATIC int
nfsv4_lock(struct nfsv4lock *lp, int iwantlock, int *isleptp,
void *mutex, struct mount *mp)
{
if (isleptp)
*isleptp = 0;
/*
* If a lock is wanted, loop around until the lock is acquired by
* someone and then released. If I want the lock, try to acquire it.
* For a lock to be issued, no lock must be in force and the usecnt
* must be zero.
*/
if (iwantlock) {
if (!(lp->nfslock_lock & NFSV4LOCK_LOCK) &&
lp->nfslock_usecnt == 0) {
lp->nfslock_lock &= ~NFSV4LOCK_LOCKWANTED;
lp->nfslock_lock |= NFSV4LOCK_LOCK;
return (1);
}
lp->nfslock_lock |= NFSV4LOCK_LOCKWANTED;
}
while (lp->nfslock_lock & (NFSV4LOCK_LOCK | NFSV4LOCK_LOCKWANTED)) {
if (mp != NULL && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
lp->nfslock_lock &= ~NFSV4LOCK_LOCKWANTED;
return (0);
}
lp->nfslock_lock |= NFSV4LOCK_WANTED;
if (isleptp)
*isleptp = 1;
(void) nfsmsleep(&lp->nfslock_lock, mutex,
PZERO - 1, "nfsv4lck", NULL);
if (iwantlock && !(lp->nfslock_lock & NFSV4LOCK_LOCK) &&
lp->nfslock_usecnt == 0) {
lp->nfslock_lock &= ~NFSV4LOCK_LOCKWANTED;
lp->nfslock_lock |= NFSV4LOCK_LOCK;
return (1);
}
}
return (0);
}
/*
* Release the lock acquired by nfsv4_lock().
* The second argument is set to 1 to indicate the nfslock_usecnt should be
* incremented, as well.
*/
APPLESTATIC void
nfsv4_unlock(struct nfsv4lock *lp, int incref)
{
lp->nfslock_lock &= ~NFSV4LOCK_LOCK;
if (incref)
lp->nfslock_usecnt++;
nfsv4_wanted(lp);
}
if (lp->nfslock_usecnt <= 0)
panic("nfsv4root ref cnt");
lp->nfslock_usecnt--;
if (lp->nfslock_usecnt == 0)
nfsv4_wanted(lp);
}
/*
* Get a reference cnt.
* This function will wait for any exclusive lock to be released, but will
* not wait for threads that want the exclusive lock. If priority needs
* to be given to threads that need the exclusive lock, a call to nfsv4_lock()
* with the 2nd argument == 0 should be done before calling nfsv4_getref().
* If the mp argument is not NULL, check for MNTK_UNMOUNTF being set and
* return without getting a refcnt for that case.
*/
APPLESTATIC void
nfsv4_getref(struct nfsv4lock *lp, int *isleptp, void *mutex,
struct mount *mp)
{
if (isleptp)
*isleptp = 0;
/*
* Wait for a lock held.
*/
while (lp->nfslock_lock & NFSV4LOCK_LOCK) {
if (mp != NULL && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0)
return;
lp->nfslock_lock |= NFSV4LOCK_WANTED;
if (isleptp)
*isleptp = 1;
(void) nfsmsleep(&lp->nfslock_lock, mutex,
PZERO - 1, "nfsv4gr", NULL);
}
if (mp != NULL && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0)
return;
lp->nfslock_usecnt++;
}
/*
* Get a reference as above, but return failure instead of sleeping if
* an exclusive lock is held.
*/
APPLESTATIC int
nfsv4_getref_nonblock(struct nfsv4lock *lp)
{
if ((lp->nfslock_lock & NFSV4LOCK_LOCK) != 0)
return (0);
lp->nfslock_usecnt++;
return (1);
}
/*
* Test for a lock. Return 1 if locked, 0 otherwise.
*/
APPLESTATIC int
nfsv4_testlock(struct nfsv4lock *lp)
{
/*
* Copy a string from an mbuf list into a character array.
* Return EBADRPC if there is an mbuf error,
* 0 otherwise.
*/
APPLESTATIC int
nfsrv_mtostr(struct nfsrv_descript *nd, char *str, int siz)
{
char *cp;
int xfer, len;
mbuf_t mp;
int rem, error = 0;
mp = nd->nd_md;
cp = nd->nd_dpos;
len = NFSMTOD(mp, caddr_t) + mbuf_len(mp) - cp;
rem = NFSM_RNDUP(siz) - siz;
while (siz > 0) {
if (len > siz)
xfer = siz;
else
xfer = len;
NFSBCOPY(cp, str, xfer);
str += xfer;
siz -= xfer;
if (siz > 0) {
mp = mbuf_next(mp);
if (mp == NULL) {
error = EBADRPC;
goto out;
}
cp = NFSMTOD(mp, caddr_t);
len = mbuf_len(mp);
} else {
cp += xfer;
len -= xfer;
}
}
*str = '\0';
nd->nd_dpos = cp;
nd->nd_md = mp;
if (rem > 0) {
if (len < rem)
error = nfsm_advance(nd, rem, len);
else
nd->nd_dpos += rem;
}
out:
NFSEXITCODE2(error, nd);
return (error);
}
/*
* Fill in the attributes as marked by the bitmap (V4).
*/
APPLESTATIC int
nfsv4_fillattr(struct nfsrv_descript *nd, struct mount *mp, vnode_t vp,
NFSACL_T *saclp, struct vattr *vap, fhandle_t *fhp, int rderror,
nfsattrbit_t *attrbitp, struct ucred *cred, NFSPROC_T *p, int isdgram,
int reterr, int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno)
{
int bitpos, retnum = 0;
u_int32_t *tl;
int siz, prefixnum, error;
u_char *cp, namestr[NFSV4_SMALLSTR];
nfsattrbit_t attrbits, retbits;
nfsattrbit_t *retbitp = &retbits;
u_int32_t freenum, *retnump;
u_int64_t uquad;
struct statfs fs;
struct nfsfsinfo fsinf;
struct timespec temptime;
NFSACL_T *aclp, *naclp = NULL;
#ifdef QUOTA
struct dqblk dqb;
uid_t savuid;
#endif
/*
* First, set the bits that can be filled and get fsinfo.
*/
NFSSET_ATTRBIT(retbitp, attrbitp);
/*
* If both p and cred are NULL, it is a client side setattr call.
* If both p and cred are not NULL, it is a server side reply call.
* If p is not NULL and cred is NULL, it is a client side callback
* reply call.
*/
if (p == NULL && cred == NULL) {
NFSCLRNOTSETABLE_ATTRBIT(retbitp);
aclp = saclp;
} else {
NFSCLRNOTFILLABLE_ATTRBIT(retbitp);
naclp = acl_alloc(M_WAITOK);
aclp = naclp;
}
nfsvno_getfs(&fsinf, isdgram);
#ifndef APPLE
/*
* Get the VFS_STATFS(), since some attributes need them.
*/
if (NFSISSETSTATFS_ATTRBIT(retbitp)) {
error = VFS_STATFS(mp, &fs);
if (error != 0) {
if (reterr) {
nd->nd_repstat = NFSERR_ACCES;
return (0);
}
NFSCLRSTATFS_ATTRBIT(retbitp);
}
}
#endif
/*
* And the NFSv4 ACL...
*/
if (NFSISSET_ATTRBIT(retbitp, NFSATTRBIT_ACLSUPPORT) &&
(nfsrv_useacl == 0 || ((cred != NULL || p != NULL) &&
supports_nfsv4acls == 0))) {
NFSCLRBIT_ATTRBIT(retbitp, NFSATTRBIT_ACLSUPPORT);
}
if (NFSISSET_ATTRBIT(retbitp, NFSATTRBIT_ACL)) {
if (nfsrv_useacl == 0 || ((cred != NULL || p != NULL) &&
supports_nfsv4acls == 0)) {
NFSCLRBIT_ATTRBIT(retbitp, NFSATTRBIT_ACL);
} else if (naclp != NULL) {
if (NFSVOPLOCK(vp, LK_SHARED) == 0) {
error = VOP_ACCESSX(vp, VREAD_ACL, cred, p);
if (error == 0)
error = VOP_GETACL(vp, ACL_TYPE_NFS4,
naclp, cred, p);
NFSVOPUNLOCK(vp, 0);
} else
error = NFSERR_PERM;
if (error != 0) {
if (reterr) {
nd->nd_repstat = NFSERR_ACCES;
return (0);
}
NFSCLRBIT_ATTRBIT(retbitp, NFSATTRBIT_ACL);
}
}
}
/*
* Put out the attribute bitmap for the ones being filled in
* and get the field for the number of attributes returned.
*/
prefixnum = nfsrv_putattrbit(nd, retbitp);
NFSM_BUILD(retnump, u_int32_t *, NFSX_UNSIGNED);
prefixnum += NFSX_UNSIGNED;
/*
* Put the attribute bits onto an mbuf list.
* Return the number of bytes of output generated.
*/
APPLESTATIC int
nfsrv_putattrbit(struct nfsrv_descript *nd, nfsattrbit_t *attrbitp)
{
u_int32_t *tl;
int cnt, i, bytesize;
for (cnt = NFSATTRBIT_MAXWORDS; cnt > 0; cnt--)
if (attrbitp->bits[cnt - 1])
break;
bytesize = (cnt + 1) * NFSX_UNSIGNED;
NFSM_BUILD(tl, u_int32_t *, bytesize);
*tl++ = txdr_unsigned(cnt);
for (i = 0; i < cnt; i++)
*tl++ = txdr_unsigned(attrbitp->bits[i]);
return (bytesize);
}
/*
* Convert a uid to a string.
* If the lookup fails, just output the digits.
* uid - the user id
* cpp - points to a buffer of size NFSV4_SMALLSTR
* (malloc a larger one, as required)
* retlenp - pointer to length to be returned
*/
APPLESTATIC void
nfsv4_uidtostr(uid_t uid, u_char **cpp, int *retlenp, NFSPROC_T *p)
{
int i;
struct nfsusrgrp *usrp;
u_char *cp = *cpp;
uid_t tmp;
int cnt, hasampersand, len = NFSV4_SMALLSTR, ret;
struct nfsrv_lughash *hp;
cnt = 0;
tryagain:
if (nfsrv_dnsnamelen > 0) {
/*
* Always map nfsrv_defaultuid to "nobody".
*/
if (uid == nfsrv_defaultuid) {
i = nfsrv_dnsnamelen + 7;
if (i > len) {
if (len > NFSV4_SMALLSTR)
free(cp, M_NFSSTRING);
cp = malloc(i, M_NFSSTRING, M_WAITOK);
*cpp = cp;
len = i;
goto tryagain;
}
*retlenp = i;
NFSBCOPY("nobody@", cp, 7);
cp += 7;
NFSBCOPY(nfsrv_dnsname, cp, nfsrv_dnsnamelen);
return;
}
hasampersand = 0;
hp = NFSUSERHASH(uid);
mtx_lock(&hp->mtx);
TAILQ_FOREACH(usrp, &hp->lughead, lug_numhash) {
if (usrp->lug_uid == uid) {
if (usrp->lug_expiry < NFSD_MONOSEC)
break;
/*
* If the name doesn't already have an '@'
* in it, append @domainname to it.
*/
for (i = 0; i < usrp->lug_namelen; i++) {
if (usrp->lug_name[i] == '@') {
hasampersand = 1;
break;
}
}
if (hasampersand)
i = usrp->lug_namelen;
else
i = usrp->lug_namelen +
nfsrv_dnsnamelen + 1;
if (i > len) {
mtx_unlock(&hp->mtx);
if (len > NFSV4_SMALLSTR)
free(cp, M_NFSSTRING);
cp = malloc(i, M_NFSSTRING, M_WAITOK);
*cpp = cp;
len = i;
goto tryagain;
}
*retlenp = i;
NFSBCOPY(usrp->lug_name, cp, usrp->lug_namelen);
if (!hasampersand) {
cp += usrp->lug_namelen;
*cp++ = '@';
NFSBCOPY(nfsrv_dnsname, cp, nfsrv_dnsnamelen);
}
TAILQ_REMOVE(&hp->lughead, usrp, lug_numhash);
TAILQ_INSERT_TAIL(&hp->lughead, usrp,
lug_numhash);
mtx_unlock(&hp->mtx);
return;
}
}
mtx_unlock(&hp->mtx);
cnt++;
ret = nfsrv_getuser(RPCNFSUSERD_GETUID, uid, (gid_t)0,
NULL, p);
if (ret == 0 && cnt < 2)
goto tryagain;
}
/*
* No match, just return a string of digits.
*/
tmp = uid;
i = 0;
while (tmp || i == 0) {
tmp /= 10;
i++;
}
len = (i > len) ? len : i;
*retlenp = len;
cp += (len - 1);
tmp = uid;
for (i = 0; i < len; i++) {
*cp-- = '0' + (tmp % 10);
tmp /= 10;
}
return;
}
/*
* Get a credential for the uid with the server's group list.
* If none is found, just return the credential passed in after
* logging a warning message.
*/
struct ucred *
nfsrv_getgrpscred(struct ucred *oldcred)
{
struct nfsusrgrp *usrp;
struct ucred *newcred;
int cnt, ret;
uid_t uid;
struct nfsrv_lughash *hp;
/*
* Convert a string to a uid.
* If no conversion is possible return NFSERR_BADOWNER, otherwise
* return 0.
* If this is called from a client side mount using AUTH_SYS and the
* string is made up entirely of digits, just convert the string to
* a number.
*/
APPLESTATIC int
nfsv4_strtouid(struct nfsrv_descript *nd, u_char *str, int len, uid_t *uidp,
NFSPROC_T *p)
{
int i;
char *cp, *endstr, *str0;
struct nfsusrgrp *usrp;
int cnt, ret;
int error = 0;
uid_t tuid;
struct nfsrv_lughash *hp, *hp2;
if (len == 0) {
error = NFSERR_BADOWNER;
goto out;
}
/* If a string of digits and an AUTH_SYS mount, just convert it. */
str0 = str;
tuid = (uid_t)strtoul(str0, &endstr, 10);
if ((endstr - str0) == len) {
/* A numeric string. */
if ((nd->nd_flag & ND_KERBV) == 0 &&
((nd->nd_flag & ND_NFSCL) != 0 ||
nfsd_enable_stringtouid != 0))
*uidp = tuid;
else
error = NFSERR_BADOWNER;
goto out;
}
/*
* Look for an '@'.
*/
cp = strchr(str0, '@');
if (cp != NULL)
i = (int)(cp++ - str0);
else
i = len;
cnt = 0;
tryagain:
if (nfsrv_dnsnamelen > 0) {
/*
* If an '@' is found and the domain name matches, search for
* the name with dns stripped off.
* Mixed case alphabetics will match for the domain name, but
* all upper case will not.
*/
if (cnt == 0 && i < len && i > 0 &&
(len - 1 - i) == nfsrv_dnsnamelen &&
!nfsrv_cmpmixedcase(cp, nfsrv_dnsname, nfsrv_dnsnamelen)) {
len -= (nfsrv_dnsnamelen + 1);
*(cp - 1) = '\0';
}
/*
* Check for the special case of "nobody".
*/
if (len == 6 && !NFSBCMP(str, "nobody", 6)) {
*uidp = nfsrv_defaultuid;
error = 0;
goto out;
}
/*
* Convert a gid to a string.
* gid - the group id
* cpp - points to a buffer of size NFSV4_SMALLSTR
* (malloc a larger one, as required)
* retlenp - pointer to length to be returned
*/
APPLESTATIC void
nfsv4_gidtostr(gid_t gid, u_char **cpp, int *retlenp, NFSPROC_T *p)
{
int i;
struct nfsusrgrp *usrp;
u_char *cp = *cpp;
gid_t tmp;
int cnt, hasampersand, len = NFSV4_SMALLSTR, ret;
struct nfsrv_lughash *hp;
cnt = 0;
tryagain:
if (nfsrv_dnsnamelen > 0) {
/*
* Always map nfsrv_defaultgid to "nogroup".
*/
if (gid == nfsrv_defaultgid) {
i = nfsrv_dnsnamelen + 8;
if (i > len) {
if (len > NFSV4_SMALLSTR)
free(cp, M_NFSSTRING);
cp = malloc(i, M_NFSSTRING, M_WAITOK);
*cpp = cp;
len = i;
goto tryagain;
}
*retlenp = i;
NFSBCOPY("nogroup@", cp, 8);
cp += 8;
NFSBCOPY(nfsrv_dnsname, cp, nfsrv_dnsnamelen);
return;
}
hasampersand = 0;
hp = NFSGROUPHASH(gid);
mtx_lock(&hp->mtx);
TAILQ_FOREACH(usrp, &hp->lughead, lug_numhash) {
if (usrp->lug_gid == gid) {
if (usrp->lug_expiry < NFSD_MONOSEC)
break;
/*
* If the name doesn't already have an '@'
* in it, append @domainname to it.
*/
for (i = 0; i < usrp->lug_namelen; i++) {
if (usrp->lug_name[i] == '@') {
hasampersand = 1;
break;
}
}
if (hasampersand)
i = usrp->lug_namelen;
else
i = usrp->lug_namelen +
nfsrv_dnsnamelen + 1;
if (i > len) {
mtx_unlock(&hp->mtx);
if (len > NFSV4_SMALLSTR)
free(cp, M_NFSSTRING);
cp = malloc(i, M_NFSSTRING, M_WAITOK);
*cpp = cp;
len = i;
goto tryagain;
}
*retlenp = i;
NFSBCOPY(usrp->lug_name, cp, usrp->lug_namelen);
if (!hasampersand) {
cp += usrp->lug_namelen;
*cp++ = '@';
NFSBCOPY(nfsrv_dnsname, cp, nfsrv_dnsnamelen);
}
TAILQ_REMOVE(&hp->lughead, usrp, lug_numhash);
TAILQ_INSERT_TAIL(&hp->lughead, usrp,
lug_numhash);
mtx_unlock(&hp->mtx);
return;
}
}
mtx_unlock(&hp->mtx);
cnt++;
ret = nfsrv_getuser(RPCNFSUSERD_GETGID, (uid_t)0, gid,
NULL, p);
if (ret == 0 && cnt < 2)
goto tryagain;
}
/*
* No match, just return a string of digits.
*/
tmp = gid;
i = 0;
while (tmp || i == 0) {
tmp /= 10;
i++;
}
len = (i > len) ? len : i;
*retlenp = len;
cp += (len - 1);
tmp = gid;
for (i = 0; i < len; i++) {
*cp-- = '0' + (tmp % 10);
tmp /= 10;
}
return;
}
/*
* Convert a string to a gid.
* If no conversion is possible return NFSERR_BADOWNER, otherwise
* return 0.
* If this is called from a client side mount using AUTH_SYS and the
* string is made up entirely of digits, just convert the string to
* a number.
*/
APPLESTATIC int
nfsv4_strtogid(struct nfsrv_descript *nd, u_char *str, int len, gid_t *gidp,
NFSPROC_T *p)
{
int i;
char *cp, *endstr, *str0;
struct nfsusrgrp *usrp;
int cnt, ret;
int error = 0;
gid_t tgid;
struct nfsrv_lughash *hp, *hp2;
if (len == 0) {
error = NFSERR_BADOWNER;
goto out;
}
/* If a string of digits and an AUTH_SYS mount, just convert it. */
str0 = str;
tgid = (gid_t)strtoul(str0, &endstr, 10);
if ((endstr - str0) == len) {
/* A numeric string. */
if ((nd->nd_flag & ND_KERBV) == 0 &&
((nd->nd_flag & ND_NFSCL) != 0 ||
nfsd_enable_stringtouid != 0))
*gidp = tgid;
else
error = NFSERR_BADOWNER;
goto out;
}
/*
* Look for an '@'.
*/
cp = strchr(str0, '@');
if (cp != NULL)
i = (int)(cp++ - str0);
else
i = len;
cnt = 0;
tryagain:
if (nfsrv_dnsnamelen > 0) {
/*
* If an '@' is found and the dns name matches, search for the
* name with the dns stripped off.
*/
if (cnt == 0 && i < len && i > 0 &&
(len - 1 - i) == nfsrv_dnsnamelen &&
!nfsrv_cmpmixedcase(cp, nfsrv_dnsname, nfsrv_dnsnamelen)) {
len -= (nfsrv_dnsnamelen + 1);
*(cp - 1) = '\0';
}
/*
* Check for the special case of "nogroup".
*/
if (len == 7 && !NFSBCMP(str, "nogroup", 7)) {
*gidp = nfsrv_defaultgid;
error = 0;
goto out;
}
/*
* Cmp len chars, allowing mixed case in the first argument to match lower
* case in the second, but not if the first argument is all upper case.
* Return 0 for a match, 1 otherwise.
*/
static int
nfsrv_cmpmixedcase(u_char *cp, u_char *cp2, int len)
{
int i;
u_char tmp;
int fndlower = 0;
for (i = 0; i < len; i++) {
if (*cp >= 'A' && *cp <= 'Z') {
tmp = *cp++ + ('a' - 'A');
} else {
tmp = *cp++;
if (tmp >= 'a' && tmp <= 'z')
fndlower = 1;
}
if (tmp != *cp2++)
return (1);
}
if (fndlower)
return (0);
else
return (1);
}
/*
* Set the port for the nfsuserd.
*/
APPLESTATIC int
nfsrv_nfsuserdport(u_short port, NFSPROC_T *p)
{
struct nfssockreq *rp;
struct sockaddr_in *ad;
int error;
/*
* This function is called from the nfssvc(2) system call, to update the
* kernel user/group name list(s) for the V4 owner and ownergroup attributes.
*/
APPLESTATIC int
nfssvc_idname(struct nfsd_idargs *nidp)
{
struct nfsusrgrp *nusrp, *usrp, *newusrp;
struct nfsrv_lughash *hp_name, *hp_idnum, *thp;
int i, group_locked, groupname_locked, user_locked, username_locked;
int error = 0;
u_char *cp;
gid_t *grps;
struct ucred *cr;
static int onethread = 0;
static time_t lasttime = 0;
if (nidp->nid_namelen <= 0 || nidp->nid_namelen > MAXHOSTNAMELEN) {
error = EINVAL;
goto out;
}
if (nidp->nid_flag & NFSID_INITIALIZE) {
cp = malloc(nidp->nid_namelen + 1, M_NFSSTRING, M_WAITOK);
error = copyin(CAST_USER_ADDR_T(nidp->nid_name), cp,
nidp->nid_namelen);
if (error != 0) {
free(cp, M_NFSSTRING);
goto out;
}
if (atomic_cmpset_acq_int(&nfsrv_dnsnamelen, 0, 0) == 0) {
/*
* Free up all the old stuff and reinitialize hash
* lists. All mutexes for both lists must be locked,
* with the user/group name ones before the uid/gid
* ones, to avoid a LOR.
*/
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsusernamehash[i].mtx);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsuserhash[i].mtx);
for (i = 0; i < nfsrv_lughashsize; i++)
TAILQ_FOREACH_SAFE(usrp,
&nfsuserhash[i].lughead, lug_numhash, nusrp)
nfsrv_removeuser(usrp, 1);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_unlock(&nfsuserhash[i].mtx);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_unlock(&nfsusernamehash[i].mtx);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsgroupnamehash[i].mtx);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsgrouphash[i].mtx);
for (i = 0; i < nfsrv_lughashsize; i++)
TAILQ_FOREACH_SAFE(usrp,
&nfsgrouphash[i].lughead, lug_numhash,
nusrp)
nfsrv_removeuser(usrp, 0);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_unlock(&nfsgrouphash[i].mtx);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_unlock(&nfsgroupnamehash[i].mtx);
free(nfsrv_dnsname, M_NFSSTRING);
nfsrv_dnsname = NULL;
}
if (nfsuserhash == NULL) {
/* Allocate the hash tables. */
nfsuserhash = malloc(sizeof(struct nfsrv_lughash) *
nfsrv_lughashsize, M_NFSUSERGROUP, M_WAITOK |
M_ZERO);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_init(&nfsuserhash[i].mtx, "nfsuidhash",
NULL, MTX_DEF | MTX_DUPOK);
nfsusernamehash = malloc(sizeof(struct nfsrv_lughash) *
nfsrv_lughashsize, M_NFSUSERGROUP, M_WAITOK |
M_ZERO);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_init(&nfsusernamehash[i].mtx,
"nfsusrhash", NULL, MTX_DEF |
MTX_DUPOK);
nfsgrouphash = malloc(sizeof(struct nfsrv_lughash) *
nfsrv_lughashsize, M_NFSUSERGROUP, M_WAITOK |
M_ZERO);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_init(&nfsgrouphash[i].mtx, "nfsgidhash",
NULL, MTX_DEF | MTX_DUPOK);
nfsgroupnamehash = malloc(sizeof(struct nfsrv_lughash) *
nfsrv_lughashsize, M_NFSUSERGROUP, M_WAITOK |
M_ZERO);
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_init(&nfsgroupnamehash[i].mtx,
"nfsgrphash", NULL, MTX_DEF | MTX_DUPOK);
}
/* (Re)initialize the list heads. */
for (i = 0; i < nfsrv_lughashsize; i++)
TAILQ_INIT(&nfsuserhash[i].lughead);
for (i = 0; i < nfsrv_lughashsize; i++)
TAILQ_INIT(&nfsusernamehash[i].lughead);
for (i = 0; i < nfsrv_lughashsize; i++)
TAILQ_INIT(&nfsgrouphash[i].lughead);
for (i = 0; i < nfsrv_lughashsize; i++)
TAILQ_INIT(&nfsgroupnamehash[i].lughead);
/*
* Put name in "DNS" string.
*/
nfsrv_dnsname = cp;
nfsrv_defaultuid = nidp->nid_uid;
nfsrv_defaultgid = nidp->nid_gid;
nfsrv_usercnt = 0;
nfsrv_usermax = nidp->nid_usermax;
atomic_store_rel_int(&nfsrv_dnsnamelen, nidp->nid_namelen);
goto out;
}
/*
* malloc the new one now, so any potential sleep occurs before
* manipulation of the lists.
*/
newusrp = malloc(sizeof(struct nfsusrgrp) + nidp->nid_namelen,
M_NFSUSERGROUP, M_WAITOK | M_ZERO);
error = copyin(CAST_USER_ADDR_T(nidp->nid_name), newusrp->lug_name,
nidp->nid_namelen);
if (error == 0 && nidp->nid_ngroup > 0 &&
(nidp->nid_flag & NFSID_ADDUID) != 0) {
grps = malloc(sizeof(gid_t) * nidp->nid_ngroup, M_TEMP,
M_WAITOK);
error = copyin(CAST_USER_ADDR_T(nidp->nid_grps), grps,
sizeof(gid_t) * nidp->nid_ngroup);
if (error == 0) {
/*
* Create a credential just like svc_getcred(),
* but using the group list provided.
*/
cr = crget();
cr->cr_uid = cr->cr_ruid = cr->cr_svuid = nidp->nid_uid;
crsetgroups(cr, nidp->nid_ngroup, grps);
cr->cr_rgid = cr->cr_svgid = cr->cr_groups[0];
cr->cr_prison = &prison0;
prison_hold(cr->cr_prison);
#ifdef MAC
mac_cred_associate_nfsd(cr);
#endif
newusrp->lug_cred = cr;
}
free(grps, M_TEMP);
}
if (error) {
free(newusrp, M_NFSUSERGROUP);
goto out;
}
newusrp->lug_namelen = nidp->nid_namelen;
/*
* The lock order is username[0]->[nfsrv_lughashsize - 1] followed
* by uid[0]->[nfsrv_lughashsize - 1], with the same for group.
* The flags user_locked, username_locked, group_locked and
* groupname_locked are set to indicate all of those hash lists are
* locked. hp_name != NULL and hp_idnum != NULL indicates that
* the respective one mutex is locked.
*/
user_locked = username_locked = group_locked = groupname_locked = 0;
hp_name = hp_idnum = NULL;
/*
* Delete old entries, as required.
*/
if (nidp->nid_flag & (NFSID_DELUID | NFSID_ADDUID)) {
/* Must lock all username hash lists first, to avoid a LOR. */
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsusernamehash[i].mtx);
username_locked = 1;
hp_idnum = NFSUSERHASH(nidp->nid_uid);
mtx_lock(&hp_idnum->mtx);
TAILQ_FOREACH_SAFE(usrp, &hp_idnum->lughead, lug_numhash,
nusrp) {
if (usrp->lug_uid == nidp->nid_uid)
nfsrv_removeuser(usrp, 1);
}
} else if (nidp->nid_flag & (NFSID_DELUSERNAME | NFSID_ADDUSERNAME)) {
hp_name = NFSUSERNAMEHASH(newusrp->lug_name,
newusrp->lug_namelen);
mtx_lock(&hp_name->mtx);
TAILQ_FOREACH_SAFE(usrp, &hp_name->lughead, lug_namehash,
nusrp) {
if (usrp->lug_namelen == newusrp->lug_namelen &&
!NFSBCMP(usrp->lug_name, newusrp->lug_name,
usrp->lug_namelen)) {
thp = NFSUSERHASH(usrp->lug_uid);
mtx_lock(&thp->mtx);
nfsrv_removeuser(usrp, 1);
mtx_unlock(&thp->mtx);
}
}
hp_idnum = NFSUSERHASH(nidp->nid_uid);
mtx_lock(&hp_idnum->mtx);
} else if (nidp->nid_flag & (NFSID_DELGID | NFSID_ADDGID)) {
/* Must lock all groupname hash lists first, to avoid a LOR. */
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsgroupnamehash[i].mtx);
groupname_locked = 1;
hp_idnum = NFSGROUPHASH(nidp->nid_gid);
mtx_lock(&hp_idnum->mtx);
TAILQ_FOREACH_SAFE(usrp, &hp_idnum->lughead, lug_numhash,
nusrp) {
if (usrp->lug_gid == nidp->nid_gid)
nfsrv_removeuser(usrp, 0);
}
} else if (nidp->nid_flag & (NFSID_DELGROUPNAME | NFSID_ADDGROUPNAME)) {
hp_name = NFSGROUPNAMEHASH(newusrp->lug_name,
newusrp->lug_namelen);
mtx_lock(&hp_name->mtx);
TAILQ_FOREACH_SAFE(usrp, &hp_name->lughead, lug_namehash,
nusrp) {
if (usrp->lug_namelen == newusrp->lug_namelen &&
!NFSBCMP(usrp->lug_name, newusrp->lug_name,
usrp->lug_namelen)) {
thp = NFSGROUPHASH(usrp->lug_gid);
mtx_lock(&thp->mtx);
nfsrv_removeuser(usrp, 0);
mtx_unlock(&thp->mtx);
}
}
hp_idnum = NFSGROUPHASH(nidp->nid_gid);
mtx_lock(&hp_idnum->mtx);
}
/*
* Once per second, allow one thread to trim the cache.
*/
if (lasttime < NFSD_MONOSEC &&
atomic_cmpset_acq_int(&onethread, 0, 1) != 0) {
/*
* First, unlock the single mutexes, so that all entries
* can be locked and any LOR is avoided.
*/
if (hp_name != NULL) {
mtx_unlock(&hp_name->mtx);
hp_name = NULL;
}
if (hp_idnum != NULL) {
mtx_unlock(&hp_idnum->mtx);
hp_idnum = NULL;
}
if ((nidp->nid_flag & (NFSID_DELUID | NFSID_ADDUID |
NFSID_DELUSERNAME | NFSID_ADDUSERNAME)) != 0) {
if (username_locked == 0) {
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsusernamehash[i].mtx);
username_locked = 1;
}
KASSERT(user_locked == 0,
("nfssvc_idname: user_locked"));
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsuserhash[i].mtx);
user_locked = 1;
for (i = 0; i < nfsrv_lughashsize; i++) {
TAILQ_FOREACH_SAFE(usrp,
&nfsuserhash[i].lughead, lug_numhash,
nusrp)
if (usrp->lug_expiry < NFSD_MONOSEC)
nfsrv_removeuser(usrp, 1);
}
for (i = 0; i < nfsrv_lughashsize; i++) {
/*
* Trim the cache using an approximate LRU
* algorithm. This code deletes the least
* recently used entry on each hash list.
*/
if (nfsrv_usercnt <= nfsrv_usermax)
break;
usrp = TAILQ_FIRST(&nfsuserhash[i].lughead);
if (usrp != NULL)
nfsrv_removeuser(usrp, 1);
}
} else {
if (groupname_locked == 0) {
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsgroupnamehash[i].mtx);
groupname_locked = 1;
}
KASSERT(group_locked == 0,
("nfssvc_idname: group_locked"));
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_lock(&nfsgrouphash[i].mtx);
group_locked = 1;
for (i = 0; i < nfsrv_lughashsize; i++) {
TAILQ_FOREACH_SAFE(usrp,
&nfsgrouphash[i].lughead, lug_numhash,
nusrp)
if (usrp->lug_expiry < NFSD_MONOSEC)
nfsrv_removeuser(usrp, 0);
}
for (i = 0; i < nfsrv_lughashsize; i++) {
/*
* Trim the cache using an approximate LRU
* algorithm. This code deletes the least
* recently user entry on each hash list.
*/
if (nfsrv_usercnt <= nfsrv_usermax)
break;
usrp = TAILQ_FIRST(&nfsgrouphash[i].lughead);
if (usrp != NULL)
nfsrv_removeuser(usrp, 0);
}
}
lasttime = NFSD_MONOSEC;
atomic_store_rel_int(&onethread, 0);
}
/* Now, unlock all locked mutexes. */
if (hp_idnum != NULL)
mtx_unlock(&hp_idnum->mtx);
if (hp_name != NULL)
mtx_unlock(&hp_name->mtx);
if (user_locked != 0)
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_unlock(&nfsuserhash[i].mtx);
if (username_locked != 0)
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_unlock(&nfsusernamehash[i].mtx);
if (group_locked != 0)
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_unlock(&nfsgrouphash[i].mtx);
if (groupname_locked != 0)
for (i = 0; i < nfsrv_lughashsize; i++)
mtx_unlock(&nfsgroupnamehash[i].mtx);
out:
NFSEXITCODE(error);
return (error);
}
/*
* Remove a user/group name element.
*/
static void
nfsrv_removeuser(struct nfsusrgrp *usrp, int isuser)
{
struct nfsrv_lughash *hp;
if (isuser != 0) {
hp = NFSUSERHASH(usrp->lug_uid);
mtx_assert(&hp->mtx, MA_OWNED);
TAILQ_REMOVE(&hp->lughead, usrp, lug_numhash);
hp = NFSUSERNAMEHASH(usrp->lug_name, usrp->lug_namelen);
mtx_assert(&hp->mtx, MA_OWNED);
TAILQ_REMOVE(&hp->lughead, usrp, lug_namehash);
} else {
hp = NFSGROUPHASH(usrp->lug_gid);
mtx_assert(&hp->mtx, MA_OWNED);
TAILQ_REMOVE(&hp->lughead, usrp, lug_numhash);
hp = NFSGROUPNAMEHASH(usrp->lug_name, usrp->lug_namelen);
mtx_assert(&hp->mtx, MA_OWNED);
TAILQ_REMOVE(&hp->lughead, usrp, lug_namehash);
}
atomic_add_int(&nfsrv_usercnt, -1);
if (usrp->lug_cred != NULL)
crfree(usrp->lug_cred);
free(usrp, M_NFSUSERGROUP);
}
/*
* Free up all the allocations related to the name<-->id cache.
* This function should only be called when the nfsuserd daemon isn't
* running, since it doesn't do any locking.
* This function is meant to be used when the nfscommon module is unloaded.
*/
APPLESTATIC void
nfsrv_cleanusergroup(void)
{
struct nfsrv_lughash *hp, *hp2;
struct nfsusrgrp *nusrp, *usrp;
int i;
/*
* This function scans a byte string and checks for UTF-8 compliance.
* It returns 0 if it conforms and NFSERR_INVAL if not.
*/
APPLESTATIC int
nfsrv_checkutf8(u_int8_t *cp, int len)
{
u_int32_t val = 0x0;
int cnt = 0, gotd = 0, shift = 0;
u_int8_t byte;
static int utf8_shift[5] = { 7, 11, 16, 21, 26 };
int error = 0;
/*
* Here are what the variables are used for:
* val - the calculated value of a multibyte char, used to check
* that it was coded with the correct range
* cnt - the number of 10xxxxxx bytes to follow
* gotd - set for a char of Dxxx, so D800<->DFFF can be checked for
* shift - lower order bits of range (ie. "val >> shift" should
* not be 0, in other words, dividing by the lower bound
* of the range should get a non-zero value)
* byte - used to calculate cnt
*/
while (len > 0) {
if (cnt > 0) {
/* This handles the 10xxxxxx bytes */
if ((*cp & 0xc0) != 0x80 ||
(gotd && (*cp & 0x20))) {
error = NFSERR_INVAL;
goto out;
}
gotd = 0;
val <<= 6;
val |= (*cp & 0x3f);
cnt--;
if (cnt == 0 && (val >> shift) == 0x0) {
error = NFSERR_INVAL;
goto out;
}
} else if (*cp & 0x80) {
/* first byte of multi byte char */
byte = *cp;
while ((byte & 0x40) && cnt < 6) {
cnt++;
byte <<= 1;
}
if (cnt == 0 || cnt == 6) {
error = NFSERR_INVAL;
goto out;
}
val = (*cp & (0x3f >> cnt));
shift = utf8_shift[cnt - 1];
if (cnt == 2 && val == 0xd)
/* Check for the 0xd800-0xdfff case */
gotd = 1;
}
cp++;
len--;
}
if (cnt > 0)
error = NFSERR_INVAL;
out:
NFSEXITCODE(error);
return (error);
}
/*
* Parse the xdr for an NFSv4 FsLocations attribute. Return two malloc'd
* strings, one with the root path in it and the other with the list of
* locations. The list is in the same format as is found in nfr_refs.
* It is a "," separated list of entries, where each of them is of the
* form <server>:<rootpath>. For example
* "nfsv4-test:/sub2,nfsv4-test2:/user/mnt,nfsv4-test2:/user/mnt2"
* The nilp argument is set to 1 for the special case of a null fs_root
* and an empty server list.
* It returns NFSERR_BADXDR, if the xdr can't be parsed and returns the
* number of xdr bytes parsed in sump.
*/
static int
nfsrv_getrefstr(struct nfsrv_descript *nd, u_char **fsrootp, u_char **srvp,
int *sump, int *nilp)
{
u_int32_t *tl;
u_char *cp = NULL, *cp2 = NULL, *cp3, *str;
int i, j, len, stringlen, cnt, slen, siz, xdrsum, error = 0, nsrv;
struct list {
SLIST_ENTRY(list) next;
int len;
u_char host[1];
} *lsp, *nlsp;
SLIST_HEAD(, list) head;
*fsrootp = NULL;
*srvp = NULL;
*nilp = 0;
/*
* Get the fs_root path and check for the special case of null path
* and 0 length server list.
*/
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
len = fxdr_unsigned(int, *tl);
if (len < 0 || len > 10240) {
error = NFSERR_BADXDR;
goto nfsmout;
}
if (len == 0) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (*tl != 0) {
error = NFSERR_BADXDR;
goto nfsmout;
}
*nilp = 1;
*sump = 2 * NFSX_UNSIGNED;
error = 0;
goto nfsmout;
}
cp = malloc(len + 1, M_NFSSTRING, M_WAITOK);
error = nfsrv_mtostr(nd, cp, len);
if (!error) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
cnt = fxdr_unsigned(int, *tl);
if (cnt <= 0)
error = NFSERR_BADXDR;
}
if (error)
goto nfsmout;
/*
* Now, loop through the location list and make up the srvlist.
*/
xdrsum = (2 * NFSX_UNSIGNED) + NFSM_RNDUP(len);
cp2 = cp3 = malloc(1024, M_NFSSTRING, M_WAITOK);
slen = 1024;
siz = 0;
for (i = 0; i < cnt; i++) {
SLIST_INIT(&head);
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
nsrv = fxdr_unsigned(int, *tl);
if (nsrv <= 0) {
error = NFSERR_BADXDR;
goto nfsmout;
}
/*
* Handle the first server by putting it in the srvstr.
*/
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
len = fxdr_unsigned(int, *tl);
if (len <= 0 || len > 1024) {
error = NFSERR_BADXDR;
goto nfsmout;
}
nfsrv_refstrbigenough(siz + len + 3, &cp2, &cp3, &slen);
if (cp3 != cp2) {
*cp3++ = ',';
siz++;
}
error = nfsrv_mtostr(nd, cp3, len);
if (error)
goto nfsmout;
cp3 += len;
*cp3++ = ':';
siz += (len + 1);
xdrsum += (2 * NFSX_UNSIGNED) + NFSM_RNDUP(len);
for (j = 1; j < nsrv; j++) {
/*
* Yuck, put them in an slist and process them later.
*/
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
len = fxdr_unsigned(int, *tl);
if (len <= 0 || len > 1024) {
error = NFSERR_BADXDR;
goto nfsmout;
}
lsp = (struct list *)malloc(sizeof (struct list)
+ len, M_TEMP, M_WAITOK);
error = nfsrv_mtostr(nd, lsp->host, len);
if (error)
goto nfsmout;
xdrsum += NFSX_UNSIGNED + NFSM_RNDUP(len);
lsp->len = len;
SLIST_INSERT_HEAD(&head, lsp, next);
}
/*
* Make the malloc'd space large enough. This is a pain, but the xdr
* doesn't set an upper bound on the side, so...
*/
static void
nfsrv_refstrbigenough(int siz, u_char **cpp, u_char **cpp2, int *slenp)
{
u_char *cp;
int i;
APPLESTATIC int
nfsv4_getipaddr(struct nfsrv_descript *nd, struct sockaddr_storage *sa,
int *isudp)
{
struct sockaddr_in *sad;
struct sockaddr_in6 *sad6;
struct in_addr saddr;
uint32_t portnum, *tl;
int af = 0, i, j, k;
char addr[64], protocol[5], *cp;
int cantparse = 0, error = 0;
uint16_t portv;
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
i = fxdr_unsigned(int, *tl);
if (i >= 3 && i <= 4) {
error = nfsrv_mtostr(nd, protocol, i);
if (error)
goto nfsmout;
if (strcmp(protocol, "tcp") == 0) {
af = AF_INET;
*isudp = 0;
} else if (strcmp(protocol, "udp") == 0) {
af = AF_INET;
*isudp = 1;
} else if (strcmp(protocol, "tcp6") == 0) {
af = AF_INET6;
*isudp = 0;
} else if (strcmp(protocol, "udp6") == 0) {
af = AF_INET6;
*isudp = 1;
} else
cantparse = 1;
} else {
cantparse = 1;
if (i > 0) {
error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
if (error)
goto nfsmout;
}
}
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
i = fxdr_unsigned(int, *tl);
if (i < 0) {
error = NFSERR_BADXDR;
goto nfsmout;
} else if (cantparse == 0 && i >= 11 && i < 64) {
/*
* The shortest address is 11chars and the longest is < 64.
*/
error = nfsrv_mtostr(nd, addr, i);
if (error)
goto nfsmout;
/* Find the port# at the end and extract that. */
i = strlen(addr);
k = 0;
cp = &addr[i - 1];
/* Count back two '.'s from end to get port# field. */
for (j = 0; j < i; j++) {
if (*cp == '.') {
k++;
if (k == 2)
break;
}
cp--;
}
if (k == 2) {
/*
* The NFSv4 port# is appended as .N.N, where N is
* a decimal # in the range 0-255, just like an inet4
* address. Cheat and use inet_aton(), which will
* return a Class A address and then shift the high
* order 8bits over to convert it to the port#.
*/
*cp++ = '\0';
if (inet_aton(cp, &saddr) == 1) {
portnum = ntohl(saddr.s_addr);
portv = (uint16_t)((portnum >> 16) |
(portnum & 0xff));
} else
cantparse = 1;
} else
cantparse = 1;
if (cantparse == 0) {
if (af == AF_INET) {
sad = (struct sockaddr_in *)sa;
if (inet_pton(af, addr, &sad->sin_addr) == 1) {
sad->sin_len = sizeof(*sad);
sad->sin_family = AF_INET;
sad->sin_port = htons(portv);
return (0);
}
} else {
sad6 = (struct sockaddr_in6 *)sa;
if (inet_pton(af, addr, &sad6->sin6_addr)
== 1) {
sad6->sin6_len = sizeof(*sad6);
sad6->sin6_family = AF_INET6;
sad6->sin6_port = htons(portv);
return (0);
}
}
}
} else {
if (i > 0) {
error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
if (error)
goto nfsmout;
}
}
error = EPERM;
nfsmout:
return (error);
}
/*
* Handle an NFSv4.1 Sequence request for the session.
* If reply != NULL, use it to return the cached reply, as required.
* The client gets a cached reply via this call for callbacks, however the
* server gets a cached reply via the nfsv4_seqsess_cachereply() call.
*/
int
nfsv4_seqsession(uint32_t seqid, uint32_t slotid, uint32_t highslot,
struct nfsslot *slots, struct mbuf **reply, uint16_t maxslot)
{
int error;
error = 0;
if (reply != NULL)
*reply = NULL;
if (slotid > maxslot)
return (NFSERR_BADSLOT);
if (seqid == slots[slotid].nfssl_seq) {
/* A retry. */
if (slots[slotid].nfssl_inprog != 0)
error = NFSERR_DELAY;
else if (slots[slotid].nfssl_reply != NULL) {
if (reply != NULL) {
*reply = slots[slotid].nfssl_reply;
slots[slotid].nfssl_reply = NULL;
}
slots[slotid].nfssl_inprog = 1;
error = NFSERR_REPLYFROMCACHE;
} else
/* No reply cached, so just do it. */
slots[slotid].nfssl_inprog = 1;
} else if ((slots[slotid].nfssl_seq + 1) == seqid) {
m_freem(slots[slotid].nfssl_reply);
slots[slotid].nfssl_reply = NULL;
slots[slotid].nfssl_inprog = 1;
slots[slotid].nfssl_seq++;
} else
error = NFSERR_SEQMISORDERED;
return (error);
}
/*
* Cache this reply for the slot.
* Use the "rep" argument to return the cached reply if repstat is set to
* NFSERR_REPLYFROMCACHE. The client never sets repstat to this value.
*/
void
nfsv4_seqsess_cacherep(uint32_t slotid, struct nfsslot *slots, int repstat,
struct mbuf **rep)
{
int
nfsv4_sequencelookup(struct nfsmount *nmp, struct nfsclsession *sep,
int *slotposp, int *maxslotp, uint32_t *slotseqp, uint8_t *sessionid)
{
int i, maxslot, slotpos;
uint64_t bitval;
/* Find an unused slot. */
slotpos = -1;
maxslot = -1;
mtx_lock(&sep->nfsess_mtx);
do {
bitval = 1;
for (i = 0; i < sep->nfsess_foreslots; i++) {
if ((bitval & sep->nfsess_slots) == 0) {
slotpos = i;
sep->nfsess_slots |= bitval;
sep->nfsess_slotseq[i]++;
*slotseqp = sep->nfsess_slotseq[i];
break;
}
bitval <<= 1;
}
if (slotpos == -1) {
/*
* If a forced dismount is in progress, just return.
* This RPC attempt will fail when it calls
* newnfs_request().
*/
if (nmp != NULL &&
(nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
!= 0) {
mtx_unlock(&sep->nfsess_mtx);
return (ESTALE);
}
/* Wake up once/sec, to check for a forced dismount. */
(void)mtx_sleep(&sep->nfsess_slots, &sep->nfsess_mtx,
PZERO, "nfsclseq", hz);
}
} while (slotpos == -1);
/* Now, find the highest slot in use. (nfsc_slots is 64bits) */
bitval = 1;
for (i = 0; i < 64; i++) {
if ((bitval & sep->nfsess_slots) != 0)
maxslot = i;
bitval <<= 1;
}
bcopy(sep->nfsess_sessionid, sessionid, NFSX_V4SESSIONID);
mtx_unlock(&sep->nfsess_mtx);
*slotposp = slotpos;
*maxslotp = maxslot;
return (0);
}
/*
* Free a session slot.
*/
APPLESTATIC void
nfsv4_freeslot(struct nfsclsession *sep, int slot)
{
uint64_t bitval;
