Author: rmacklem
Date: Thu May 14 21:39:08 2009
New Revision: 192121
URL: http://svn.freebsd.org/changeset/base/192121
Log:
Apply changes to the experimental nfs server so that it uses the security
flavors as exported in FreeBSD-CURRENT. This allows it to use a
slightly modified mountd.c instead of a different utility.
Approved by: kib (mentor)
Modified:
head/sys/fs/nfs/nfs.h
head/sys/fs/nfs/nfs_var.h
head/sys/fs/nfs/nfsdport.h
head/sys/fs/nfs/nfsport.h
head/sys/fs/nfsclient/nfs_clkrpc.c
head/sys/fs/nfsserver/nfs_nfsdkrpc.c
head/sys/fs/nfsserver/nfs_nfsdport.c
head/sys/fs/nfsserver/nfs_nfsdserv.c
head/sys/fs/nfsserver/nfs_nfsdsocket.c
head/sys/fs/nfsserver/nfs_nfsdsubs.c
Modified: head/sys/fs/nfs/nfs.h
==============================================================================
--- head/sys/fs/nfs/nfs.h Thu May 14 21:27:03 2009 (r192120)
+++ head/sys/fs/nfs/nfs.h Thu May 14 21:39:08 2009 (r192121)
@@ -580,7 +580,6 @@ struct nfsrv_descript {
u_int64_t nd_compref; /* Compound RPC ref# */
time_t nd_tcpconntime; /* Time TCP connection est. */
nfsquad_t nd_clientid; /* Implied clientid */
- int nd_credflavor; /* credential flavor */
int nd_gssnamelen; /* principal name length */
char *nd_gssname; /* principal name */
};
@@ -608,8 +607,11 @@ struct nfsrv_descript {
#define ND_V4WCCATTR 0x00010000
#define ND_NFSCB 0x00020000
#define ND_AUTHNONE 0x00040000
-#define ND_EXGSSONLY 0x00080000
-#define ND_INCRSEQID 0x00100000
+#define ND_EXAUTHSYS 0x00080000
+#define ND_EXGSS 0x00100000
+#define ND_EXGSSINTEGRITY 0x00200000
+#define ND_EXGSSPRIVACY 0x00400000
+#define ND_INCRSEQID 0x00800000
/*
* ND_GSS should be the "or" of all GSS type authentications.
@@ -631,11 +633,6 @@ struct nfsv4_opflag {
#define NFSRVSEQID_OPEN 0x04
/*
- * MNT_EXGSSONLY is the Or of all the EXGSS bits.
- */
-#define MNT_EXGSSONLY MNT_EXGSSKRB5
-
-/*
* assign a doubly linked list to a new head
* and prepend one list into another.
*/
Modified: head/sys/fs/nfs/nfs_var.h
==============================================================================
--- head/sys/fs/nfs/nfs_var.h Thu May 14 21:27:03 2009 (r192120)
+++ head/sys/fs/nfs/nfs_var.h Thu May 14 21:39:08 2009 (r192121)
@@ -306,6 +306,7 @@ int nfsrv_putreferralattr(struct nfsrv_d
int nfsrv_parsename(struct nfsrv_descript *, char *, u_long *,
NFSPATHLEN_T *);
void nfsd_init(void);
+int nfsd_checkrootexp(struct nfsrv_descript *);
/* nfs_clvfsops.c */
@@ -575,6 +576,7 @@ int nfsvno_advlock(vnode_t, int, u_int64
void nfsvno_unlockvfs(mount_t);
int nfsvno_lockvfs(mount_t);
int nfsrv_v4rootexport(void *, struct ucred *, NFSPROC_T *);
+int nfsvno_testexp(struct nfsrv_descript *, struct nfsexstuff *);
/* nfs_commonkrpc.c */
int newnfs_nmcancelreqs(struct nfsmount *);
Modified: head/sys/fs/nfs/nfsdport.h
==============================================================================
--- head/sys/fs/nfs/nfsdport.h Thu May 14 21:27:03 2009 (r192120)
+++ head/sys/fs/nfs/nfsdport.h Thu May 14 21:39:08 2009 (r192121)
@@ -52,8 +52,10 @@
* needs to be returned by nfsd_fhtovp().
*/
struct nfsexstuff {
- int nes_vfslocked; /* required for all ports */
- int nes_exflag;
+ int nes_vfslocked; /* required for all ports */
+ int nes_exflag; /* export flags */
+ int nes_numsecflavor; /* # of security flavors */
+ int nes_secflavors[MAXSECFLAVORS]; /* and the flavors */
};
#define NFSVNO_EXINIT(e) ((e)->nes_exflag = 0)
@@ -61,11 +63,9 @@ struct nfsexstuff {
#define NFSVNO_EXRDONLY(e) ((e)->nes_exflag & MNT_EXRDONLY)
#define NFSVNO_EXPORTANON(e) ((e)->nes_exflag &
MNT_EXPORTANON)
#define NFSVNO_EXSTRICTACCESS(e) ((e)->nes_exflag &
MNT_EXSTRICTACCESS)
-#define NFSVNO_EXGSSONLY(e) ((e)->nes_exflag &
MNT_EXGSSONLY)
#define NFSVNO_EXV4ONLY(e) ((e)->nes_exflag & MNT_EXV4ONLY)
#define NFSVNO_SETEXRDONLY(e) ((e)->nes_exflag =
(MNT_EXPORTED|MNT_EXRDONLY))
-#define NFSVNO_SETEXGSSONLY(e) ((e)->nes_exflag |=
MNT_EXGSSONLY)
#define NFSVNO_CMPFH(f1, f2)
\
((f1)->fh_fsid.val[0] == (f2)->fh_fsid.val[0] && \
Modified: head/sys/fs/nfs/nfsport.h
==============================================================================
--- head/sys/fs/nfs/nfsport.h Thu May 14 21:27:03 2009 (r192120)
+++ head/sys/fs/nfs/nfsport.h Thu May 14 21:39:08 2009 (r192121)
@@ -645,11 +645,6 @@ struct nfsex_args {
};
/*
- * Define these here, so they don't have to be in mount.h, for now.
- */
-#define MNT_EXGSSKRB5 MNT_EXKERB
-
-/*
* These export flags should be defined, but there are no bits left.
* Maybe a separate mnt_exflag field could be added or the mnt_flag
* field increased to 64 bits?
Modified: head/sys/fs/nfsclient/nfs_clkrpc.c
==============================================================================
--- head/sys/fs/nfsclient/nfs_clkrpc.c Thu May 14 21:27:03 2009
(r192120)
+++ head/sys/fs/nfsclient/nfs_clkrpc.c Thu May 14 21:39:08 2009
(r192121)
@@ -66,7 +66,7 @@ static void
nfscb_program(struct svc_req *rqst, SVCXPRT *xprt)
{
struct nfsrv_descript nd;
- int cacherep;
+ int cacherep, credflavor;
memset(&nd, 0, sizeof(nd));
if (rqst->rq_proc != NFSPROC_NULL &&
@@ -94,12 +94,14 @@ nfscb_program(struct svc_req *rqst, SVCX
nd.nd_cred = NULL;
if (nd.nd_procnum != NFSPROC_NULL) {
- if (!svc_getcred(rqst, &nd.nd_cred, &nd.nd_credflavor)) {
+ if (!svc_getcred(rqst, &nd.nd_cred, &credflavor)) {
svcerr_weakauth(rqst);
svc_freereq(rqst);
m_freem(nd.nd_mrep);
return;
}
+
+ /* For now, I don't care what credential flavor was used. */
#ifdef notyet
#ifdef MAC
mac_cred_associate_nfsd(nd.nd_cred);
Modified: head/sys/fs/nfsserver/nfs_nfsdkrpc.c
==============================================================================
--- head/sys/fs/nfsserver/nfs_nfsdkrpc.c Thu May 14 21:27:03 2009
(r192120)
+++ head/sys/fs/nfsserver/nfs_nfsdkrpc.c Thu May 14 21:39:08 2009
(r192121)
@@ -97,7 +97,7 @@ nfssvc_program(struct svc_req *rqst, SVC
{
struct nfsrv_descript nd;
struct nfsrvcache *rp = NULL;
- int cacherep;
+ int cacherep, credflavor;
memset(&nd, 0, sizeof(nd));
if (rqst->rq_vers == NFS_VER2) {
@@ -186,12 +186,27 @@ nfssvc_program(struct svc_req *rqst, SVC
}
if (nd.nd_procnum != NFSPROC_NULL) {
- if (!svc_getcred(rqst, &nd.nd_cred, &nd.nd_credflavor)) {
+ if (!svc_getcred(rqst, &nd.nd_cred, &credflavor)) {
svcerr_weakauth(rqst);
svc_freereq(rqst);
m_freem(nd.nd_mrep);
return;
}
+
+ /* Set the flag based on credflavor */
+ if (credflavor == RPCSEC_GSS_KRB5) {
+ nd.nd_flag |= ND_GSS;
+ } else if (credflavor == RPCSEC_GSS_KRB5I) {
+ nd.nd_flag |= (ND_GSS | ND_GSSINTEGRITY);
+ } else if (credflavor == RPCSEC_GSS_KRB5P) {
+ nd.nd_flag |= (ND_GSS | ND_GSSPRIVACY);
+ } else if (credflavor != AUTH_SYS) {
+ svcerr_weakauth(rqst);
+ svc_freereq(rqst);
+ m_freem(nd.nd_mrep);
+ return;
+ }
+
#ifdef MAC
mac_cred_associate_nfsd(nd.nd_cred);
#endif
Modified: head/sys/fs/nfsserver/nfs_nfsdport.c
==============================================================================
--- head/sys/fs/nfsserver/nfs_nfsdport.c Thu May 14 21:27:03 2009
(r192120)
+++ head/sys/fs/nfsserver/nfs_nfsdport.c Thu May 14 21:39:08 2009
(r192121)
@@ -2352,14 +2352,16 @@ nfsd_excred(struct nfsrv_descript *nd, s
* Check/setup credentials.
*/
if (nd->nd_flag & ND_GSS)
- exp->nes_exflag &= ~(MNT_EXGSSONLY | MNT_EXPORTANON);
+ exp->nes_exflag &= ~MNT_EXPORTANON;
/*
- * For AUTH_SYS, check to see if it is allowed.
+ * Check to see if the operation is allowed for this security flavor.
* RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to
* AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS.
+ * Also, allow Secinfo, so that it can acquire the correct flavor(s).
*/
- if (NFSVNO_EXGSSONLY(exp) &&
+ if (nfsvno_testexp(nd, exp) &&
+ nd->nd_procnum != NFSV4OP_SECINFO &&
nd->nd_procnum != NFSPROC_FSINFO) {
if (nd->nd_flag & ND_NFSV4)
error = NFSERR_WRONGSEC;
@@ -2400,14 +2402,20 @@ int
nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp,
struct ucred **credp)
{
- int error;
- int numsecflavor, *secflavors;
+ int i, error, *secflavors;
error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
- &numsecflavor, &secflavors);
- if (error && nfs_rootfhset) {
- exp->nes_exflag = 0;
- error = 0;
+ &exp->nes_numsecflavor, &secflavors);
+ if (error) {
+ if (nfs_rootfhset) {
+ exp->nes_exflag = 0;
+ exp->nes_numsecflavor = 0;
+ error = 0;
+ }
+ } else {
+ /* Copy the security flavors. */
+ for (i = 0; i < exp->nes_numsecflavor; i++)
+ exp->nes_secflavors[i] = secflavors[i];
}
return (error);
}
@@ -2419,21 +2427,26 @@ int
nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam,
struct vnode **vpp, struct nfsexstuff *exp, struct ucred **credp)
{
- int error;
- int numsecflavor, *secflavors;
+ int i, error, *secflavors;
*credp = NULL;
+ exp->nes_numsecflavor = 0;
error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp);
if (nam && !error) {
error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
- &numsecflavor, &secflavors);
+ &exp->nes_numsecflavor, &secflavors);
if (error) {
if (nfs_rootfhset) {
exp->nes_exflag = 0;
+ exp->nes_numsecflavor = 0;
error = 0;
} else {
vput(*vpp);
}
+ } else {
+ /* Copy the security flavors. */
+ for (i = 0; i < exp->nes_numsecflavor; i++)
+ exp->nes_secflavors[i] = secflavors[i];
}
}
return (error);
@@ -2539,18 +2552,19 @@ nfsd_fhtovp(struct nfsrv_descript *nd, s
*/
#ifdef NFS_REQRSVPORT
if (!nd->nd_repstat) {
- struct sockaddr_in *saddr;
- struct sockaddr_in6 *saddr6;
- saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *);
- saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *);
- if (!(nd->nd_flag & ND_NFSV4) &&
- ((saddr->sin_family == AF_INET &&
- ntohs(saddr->sin_port) >= IPPORT_RESERVED) ||
- (saddr6->sin6_family == AF_INET6 &&
- ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) {
- vput(*vpp);
- nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
- }
+ struct sockaddr_in *saddr;
+ struct sockaddr_in6 *saddr6;
+
+ saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *);
+ saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *);
+ if (!(nd->nd_flag & ND_NFSV4) &&
+ ((saddr->sin_family == AF_INET &&
+ ntohs(saddr->sin_port) >= IPPORT_RESERVED) ||
+ (saddr6->sin6_family == AF_INET6 &&
+ ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) {
+ vput(*vpp);
+ nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
+ }
}
#endif /* NFS_REQRSVPORT */
@@ -2598,7 +2612,7 @@ fp_getfvp(struct thread *p, int fd, stru
}
/*
- * Called from newnfssvc() to update the exports list. Just call
+ * Called from nfssvc() to update the exports list. Just call
* vfs_export(). This has to be done, since the v4 root fake fs isn't
* in the mount list.
*/
@@ -2610,11 +2624,6 @@ nfsrv_v4rootexport(void *argp, struct uc
struct nameidata nd;
fhandle_t fh;
- /*
- * Until newmountd is using the secflavor fields, just make
- * sure it's 0.
- */
- nfsexargp->export.ex_numsecflavors = 0;
error = vfs_export(&nfsv4root_mnt, &nfsexargp->export);
if ((nfsexargp->export.ex_flags & MNT_DELEXPORT)) {
nfs_rootfhset = 0;
@@ -2843,16 +2852,24 @@ int
nfsvno_v4rootexport(struct nfsrv_descript *nd)
{
struct ucred *credanon;
- int exflags, error;
+ int exflags, error, numsecflavor, *secflavors, i;
error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags,
- &credanon, NULL, NULL);
+ &credanon, &numsecflavor, &secflavors);
if (error)
return (NFSERR_PROGUNAVAIL);
- if ((exflags & MNT_EXGSSONLY))
- nd->nd_flag |= ND_EXGSSONLY;
if (credanon != NULL)
crfree(credanon);
+ for (i = 0; i < numsecflavor; i++) {
+ if (secflavors[i] == AUTH_SYS)
+ nd->nd_flag |= ND_EXAUTHSYS;
+ else if (secflavors[i] == RPCSEC_GSS_KRB5)
+ nd->nd_flag |= ND_EXGSS;
+ else if (secflavors[i] == RPCSEC_GSS_KRB5I)
+ nd->nd_flag |= ND_EXGSSINTEGRITY;
+ else if (secflavors[i] == RPCSEC_GSS_KRB5P)
+ nd->nd_flag |= ND_EXGSSPRIVACY;
+ }
return (0);
}
@@ -2985,6 +3002,45 @@ nfssvc_srvcall(struct thread *p, struct
return (error);
}
+/*
+ * Check exports.
+ * Returns 0 if ok, 1 otherwise.
+ */
+int
+nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp)
+{
+ int i;
+
+ /*
+ * This seems odd, but allow the case where the security flavor
+ * list is empty. This happens when NFSv4 is traversing non-exported
+ * file systems. Exported file systems should always have a non-empty
+ * security flavor list.
+ */
+ if (exp->nes_numsecflavor == 0)
+ return (0);
+
+ for (i = 0; i < exp->nes_numsecflavor; i++) {
+ /*
+ * The tests for privacy and integrity must be first,
+ * since ND_GSS is set for everything but AUTH_SYS.
+ */
+ if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P &&
+ (nd->nd_flag & ND_GSSPRIVACY))
+ return (0);
+ if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I &&
+ (nd->nd_flag & ND_GSSINTEGRITY))
+ return (0);
+ if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 &&
+ (nd->nd_flag & ND_GSS))
+ return (0);
+ if (exp->nes_secflavors[i] == AUTH_SYS &&
+ (nd->nd_flag & ND_GSS) == 0)
+ return (0);
+ }
+ return (1);
+}
+
extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *);
/*
Modified: head/sys/fs/nfsserver/nfs_nfsdserv.c
==============================================================================
--- head/sys/fs/nfsserver/nfs_nfsdserv.c Thu May 14 21:27:03 2009
(r192120)
+++ head/sys/fs/nfsserver/nfs_nfsdserv.c Thu May 14 21:39:08 2009
(r192121)
@@ -3090,7 +3090,6 @@ nfsrvd_secinfo(struct nfsrv_descript *nd
retnes.nes_vfslocked = exp->nes_vfslocked;
vput(vp);
savflag = nd->nd_flag;
- nd->nd_flag |= ND_GSS; /* so nfsd_fhtovp() won't reply Wrongsec */
if (!nd->nd_repstat) {
nfsd_fhtovp(nd, &fh, &vp, &retnes, &mp, 0, p);
if (vp)
@@ -3106,20 +3105,39 @@ nfsrvd_secinfo(struct nfsrv_descript *nd
*/
len = 0;
NFSM_BUILD(sizp, u_int32_t *, NFSX_UNSIGNED);
- if (!NFSVNO_EXGSSONLY(&retnes)) {
- NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
- *tl = txdr_unsigned(RPCAUTH_UNIX);
- len++;
- }
- for (i = RPCAUTHGSS_SVCNONE; i <= RPCAUTHGSS_SVCPRIVACY; i++) {
- NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
- *tl++ = txdr_unsigned(RPCAUTH_GSS);
- (void) nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
- nfsgss_mechlist[KERBV_MECH].len);
- NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
- *tl++ = txdr_unsigned(GSS_KERBV_QOP);
- *tl = txdr_unsigned(i);
- len++;
+ for (i = 0; i < retnes.nes_numsecflavor; i++) {
+ if (retnes.nes_secflavors[i] == AUTH_SYS) {
+ NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
+ *tl = txdr_unsigned(RPCAUTH_UNIX);
+ len++;
+ } else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5) {
+ NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
+ *tl++ = txdr_unsigned(RPCAUTH_GSS);
+ (void) nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
+ nfsgss_mechlist[KERBV_MECH].len);
+ NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
+ *tl++ = txdr_unsigned(GSS_KERBV_QOP);
+ *tl = txdr_unsigned(RPCAUTHGSS_SVCNONE);
+ len++;
+ } else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5I) {
+ NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
+ *tl++ = txdr_unsigned(RPCAUTH_GSS);
+ (void) nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
+ nfsgss_mechlist[KERBV_MECH].len);
+ NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
+ *tl++ = txdr_unsigned(GSS_KERBV_QOP);
+ *tl = txdr_unsigned(RPCAUTHGSS_SVCINTEGRITY);
+ len++;
+ } else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5P) {
+ NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
+ *tl++ = txdr_unsigned(RPCAUTH_GSS);
+ (void) nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
+ nfsgss_mechlist[KERBV_MECH].len);
+ NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
+ *tl++ = txdr_unsigned(GSS_KERBV_QOP);
+ *tl = txdr_unsigned(RPCAUTHGSS_SVCPRIVACY);
+ len++;
+ }
}
*sizp = txdr_unsigned(len);
return (0);
@@ -3141,7 +3159,7 @@ nfsrvd_setclientid(struct nfsrv_descript
nfsquad_t clientid, confirm;
if ((!nfs_rootfhset && !nfsv4root_set) ||
- (nd->nd_flag & (ND_GSS | ND_EXGSSONLY)) == ND_EXGSSONLY) {
+ nfsd_checkrootexp(nd)) {
nd->nd_repstat = NFSERR_WRONGSEC;
return (0);
}
@@ -3250,7 +3268,7 @@ nfsrvd_setclientidcfrm(struct nfsrv_desc
nfsquad_t clientid, confirm;
if ((!nfs_rootfhset && !nfsv4root_set) ||
- (nd->nd_flag & (ND_GSS | ND_EXGSSONLY)) == ND_EXGSSONLY) {
+ nfsd_checkrootexp(nd)) {
nd->nd_repstat = NFSERR_WRONGSEC;
return (0);
}
Modified: head/sys/fs/nfsserver/nfs_nfsdsocket.c
==============================================================================
--- head/sys/fs/nfsserver/nfs_nfsdsocket.c Thu May 14 21:27:03 2009
(r192120)
+++ head/sys/fs/nfsserver/nfs_nfsdsocket.c Thu May 14 21:39:08 2009
(r192121)
@@ -819,8 +819,7 @@ nfsrvd_compound(struct nfsrv_descript *n
op != NFSV4OP_GETFH &&
op != NFSV4OP_SECINFO)
nd->nd_repstat = NFSERR_NOFILEHANDLE;
- else if (NFSVNO_EXGSSONLY(&vpnes) &&
- !(nd->nd_flag & ND_GSS) &&
+ else if (nfsvno_testexp(nd, &vpnes) &&
op != NFSV4OP_LOOKUP &&
op != NFSV4OP_GETFH &&
op != NFSV4OP_GETATTR &&
Modified: head/sys/fs/nfsserver/nfs_nfsdsubs.c
==============================================================================
--- head/sys/fs/nfsserver/nfs_nfsdsubs.c Thu May 14 21:27:03 2009
(r192120)
+++ head/sys/fs/nfsserver/nfs_nfsdsubs.c Thu May 14 21:39:08 2009
(r192121)
@@ -2019,3 +2019,25 @@ nfsd_init(void)
NFSBZERO(nfs_v2pubfh, NFSX_V2FH);
}
+/*
+ * Check the v4 root exports.
+ * Return 0 if ok, 1 otherwise.
+ */
+int
+nfsd_checkrootexp(struct nfsrv_descript *nd)
+{
+
+ if ((nd->nd_flag & (ND_GSS | ND_EXAUTHSYS)) == ND_EXAUTHSYS)
+ return (0);
+ if ((nd->nd_flag & (ND_GSSINTEGRITY | ND_EXGSSINTEGRITY)) ==
+ (ND_GSSINTEGRITY | ND_EXGSSINTEGRITY))
+ return (0);
+ if ((nd->nd_flag & (ND_GSSPRIVACY | ND_EXGSSPRIVACY)) ==
+ (ND_GSSPRIVACY | ND_EXGSSPRIVACY))
+ return (0);
+ if ((nd->nd_flag & (ND_GSS | ND_GSSINTEGRITY | ND_GSSPRIVACY |
+ ND_EXGSS)) == (ND_GSS | ND_EXGSS))
+ return (0);
+ return (1);
+}
+
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