nfs_nfsdkrpc.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1989, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This code is derived from software contributed to Berkeley by
    8  * Rick Macklem at The University of Guelph.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __FBSDID("$FreeBSD: releng/12.0/sys/fs/nfsserver/nfs_nfsdkrpc.c 337990 2018-08-17 21:12:16Z rmacklem $");
   38 
   39 #include "opt_inet6.h"
   40 #include "opt_kgssapi.h"
   41 
   42 #include <fs/nfs/nfsport.h>
   43 
   44 #include <rpc/rpc.h>
   45 #include <rpc/rpcsec_gss.h>
   46 
   47 #include <nfs/nfs_fha.h>
   48 #include <fs/nfsserver/nfs_fha_new.h>
   49 
   50 #include <security/mac/mac_framework.h>
   51 
   52 NFSDLOCKMUTEX;
   53 NFSV4ROOTLOCKMUTEX;
   54 struct nfsv4lock nfsd_suspend_lock;
   55 char *nfsrv_zeropnfsdat = NULL;
   56 
   57 /*
   58  * Mapping of old NFS Version 2 RPC numbers to generic numbers.
   59  */
   60 int newnfs_nfsv3_procid[NFS_V3NPROCS] = {
   61         NFSPROC_NULL,
   62         NFSPROC_GETATTR,
   63         NFSPROC_SETATTR,
   64         NFSPROC_NOOP,
   65         NFSPROC_LOOKUP,
   66         NFSPROC_READLINK,
   67         NFSPROC_READ,
   68         NFSPROC_NOOP,
   69         NFSPROC_WRITE,
   70         NFSPROC_CREATE,
   71         NFSPROC_REMOVE,
   72         NFSPROC_RENAME,
   73         NFSPROC_LINK,
   74         NFSPROC_SYMLINK,
   75         NFSPROC_MKDIR,
   76         NFSPROC_RMDIR,
   77         NFSPROC_READDIR,
   78         NFSPROC_FSSTAT,
   79         NFSPROC_NOOP,
   80         NFSPROC_NOOP,
   81         NFSPROC_NOOP,
   82         NFSPROC_NOOP,
   83 };
   84 
   85 
   86 SYSCTL_DECL(_vfs_nfsd);
   87 
   88 SVCPOOL         *nfsrvd_pool;
   89 
   90 static int      nfs_privport = 0;
   91 SYSCTL_INT(_vfs_nfsd, OID_AUTO, nfs_privport, CTLFLAG_RWTUN,
   92     &nfs_privport, 0,
   93     "Only allow clients using a privileged port for NFSv2 and 3");
   94 
   95 static int      nfs_minvers = NFS_VER2;
   96 SYSCTL_INT(_vfs_nfsd, OID_AUTO, server_min_nfsvers, CTLFLAG_RWTUN,
   97     &nfs_minvers, 0, "The lowest version of NFS handled by the server");
   98 
   99 static int      nfs_maxvers = NFS_VER4;
  100 SYSCTL_INT(_vfs_nfsd, OID_AUTO, server_max_nfsvers, CTLFLAG_RWTUN,
  101     &nfs_maxvers, 0, "The highest version of NFS handled by the server");
  102 
  103 static int nfs_proc(struct nfsrv_descript *, u_int32_t, SVCXPRT *xprt,
  104     struct nfsrvcache **);
  105 
  106 extern u_long sb_max_adj;
  107 extern int newnfs_numnfsd;
  108 extern struct proc *nfsd_master_proc;
  109 extern time_t nfsdev_time;
  110 extern int nfsrv_writerpc[NFS_NPROCS];
  111 extern volatile int nfsrv_devidcnt;
  112 extern struct nfsv4_opflag nfsv4_opflag[NFSV41_NOPS];
  113 
  114 /*
  115  * NFS server system calls
  116  */
  117 
  118 static void
  119 nfssvc_program(struct svc_req *rqst, SVCXPRT *xprt)
  120 {
  121         struct nfsrv_descript nd;
  122         struct nfsrvcache *rp = NULL;
  123         int cacherep, credflavor;
  124 
  125         memset(&nd, 0, sizeof(nd));
  126         if (rqst->rq_vers == NFS_VER2) {
  127                 if (rqst->rq_proc > NFSV2PROC_STATFS ||
  128                     newnfs_nfsv3_procid[rqst->rq_proc] == NFSPROC_NOOP) {
  129                         svcerr_noproc(rqst);
  130                         svc_freereq(rqst);
  131                         goto out;
  132                 }
  133                 nd.nd_procnum = newnfs_nfsv3_procid[rqst->rq_proc];
  134                 nd.nd_flag = ND_NFSV2;
  135         } else if (rqst->rq_vers == NFS_VER3) {
  136                 if (rqst->rq_proc >= NFS_V3NPROCS) {
  137                         svcerr_noproc(rqst);
  138                         svc_freereq(rqst);
  139                         goto out;
  140                 }
  141                 nd.nd_procnum = rqst->rq_proc;
  142                 nd.nd_flag = ND_NFSV3;
  143         } else {
  144                 if (rqst->rq_proc != NFSPROC_NULL &&
  145                     rqst->rq_proc != NFSV4PROC_COMPOUND) {
  146                         svcerr_noproc(rqst);
  147                         svc_freereq(rqst);
  148                         goto out;
  149                 }
  150                 nd.nd_procnum = rqst->rq_proc;
  151                 nd.nd_flag = ND_NFSV4;
  152         }
  153 
  154         /*
  155          * Note: we want rq_addr, not svc_getrpccaller for nd_nam2 -
  156          * NFS_SRVMAXDATA uses a NULL value for nd_nam2 to detect TCP
  157          * mounts.
  158          */
  159         nd.nd_mrep = rqst->rq_args;
  160         rqst->rq_args = NULL;
  161         newnfs_realign(&nd.nd_mrep, M_WAITOK);
  162         nd.nd_md = nd.nd_mrep;
  163         nd.nd_dpos = mtod(nd.nd_md, caddr_t);
  164         nd.nd_nam = svc_getrpccaller(rqst);
  165         nd.nd_nam2 = rqst->rq_addr;
  166         nd.nd_mreq = NULL;
  167         nd.nd_cred = NULL;
  168 
  169         if (nfs_privport && (nd.nd_flag & ND_NFSV4) == 0) {
  170                 /* Check if source port is privileged */
  171                 u_short port;
  172                 struct sockaddr *nam = nd.nd_nam;
  173                 struct sockaddr_in *sin;
  174 
  175                 sin = (struct sockaddr_in *)nam;
  176                 /*
  177                  * INET/INET6 - same code:
  178                  *    sin_port and sin6_port are at same offset
  179                  */
  180                 port = ntohs(sin->sin_port);
  181                 if (port >= IPPORT_RESERVED &&
  182                     nd.nd_procnum != NFSPROC_NULL) {
  183 #ifdef INET6
  184                         char buf[INET6_ADDRSTRLEN];
  185 #else
  186                         char buf[INET_ADDRSTRLEN];
  187 #endif
  188 #ifdef INET6
  189 #if defined(KLD_MODULE)
  190                         /* Do not use ip6_sprintf: the nfs module should work without INET6. */
  191 #define ip6_sprintf(buf, a)                                             \
  192                         (sprintf((buf), "%x:%x:%x:%x:%x:%x:%x:%x",      \
  193                             (a)->s6_addr16[0], (a)->s6_addr16[1],       \
  194                             (a)->s6_addr16[2], (a)->s6_addr16[3],       \
  195                             (a)->s6_addr16[4], (a)->s6_addr16[5],       \
  196                             (a)->s6_addr16[6], (a)->s6_addr16[7]),      \
  197                             (buf))
  198 #endif
  199 #endif
  200                         printf("NFS request from unprivileged port (%s:%d)\n",
  201 #ifdef INET6
  202                             sin->sin_family == AF_INET6 ?
  203                             ip6_sprintf(buf, &satosin6(sin)->sin6_addr) :
  204 #if defined(KLD_MODULE)
  205 #undef ip6_sprintf
  206 #endif
  207 #endif
  208                             inet_ntoa_r(sin->sin_addr, buf), port);
  209                         svcerr_weakauth(rqst);
  210                         svc_freereq(rqst);
  211                         m_freem(nd.nd_mrep);
  212                         goto out;
  213                 }
  214         }
  215 
  216         if (nd.nd_procnum != NFSPROC_NULL) {
  217                 if (!svc_getcred(rqst, &nd.nd_cred, &credflavor)) {
  218                         svcerr_weakauth(rqst);
  219                         svc_freereq(rqst);
  220                         m_freem(nd.nd_mrep);
  221                         goto out;
  222                 }
  223 
  224                 /* Set the flag based on credflavor */
  225                 if (credflavor == RPCSEC_GSS_KRB5) {
  226                         nd.nd_flag |= ND_GSS;
  227                 } else if (credflavor == RPCSEC_GSS_KRB5I) {
  228                         nd.nd_flag |= (ND_GSS | ND_GSSINTEGRITY);
  229                 } else if (credflavor == RPCSEC_GSS_KRB5P) {
  230                         nd.nd_flag |= (ND_GSS | ND_GSSPRIVACY);
  231                 } else if (credflavor != AUTH_SYS) {
  232                         svcerr_weakauth(rqst);
  233                         svc_freereq(rqst);
  234                         m_freem(nd.nd_mrep);
  235                         goto out;
  236                 }
  237 
  238 #ifdef MAC
  239                 mac_cred_associate_nfsd(nd.nd_cred);
  240 #endif
  241                 /*
  242                  * Get a refcnt (shared lock) on nfsd_suspend_lock.
  243                  * NFSSVC_SUSPENDNFSD will take an exclusive lock on
  244                  * nfsd_suspend_lock to suspend these threads.
  245                  * The call to nfsv4_lock() that precedes nfsv4_getref()
  246                  * ensures that the acquisition of the exclusive lock
  247                  * takes priority over acquisition of the shared lock by
  248                  * waiting for any exclusive lock request to complete.
  249                  * This must be done here, before the check of
  250                  * nfsv4root exports by nfsvno_v4rootexport().
  251                  */
  252                 NFSLOCKV4ROOTMUTEX();
  253                 nfsv4_lock(&nfsd_suspend_lock, 0, NULL, NFSV4ROOTLOCKMUTEXPTR,
  254                     NULL);
  255                 nfsv4_getref(&nfsd_suspend_lock, NULL, NFSV4ROOTLOCKMUTEXPTR,
  256                     NULL);
  257                 NFSUNLOCKV4ROOTMUTEX();
  258 
  259                 if ((nd.nd_flag & ND_NFSV4) != 0) {
  260                         nd.nd_repstat = nfsvno_v4rootexport(&nd);
  261                         if (nd.nd_repstat != 0) {
  262                                 NFSLOCKV4ROOTMUTEX();
  263                                 nfsv4_relref(&nfsd_suspend_lock);
  264                                 NFSUNLOCKV4ROOTMUTEX();
  265                                 svcerr_weakauth(rqst);
  266                                 svc_freereq(rqst);
  267                                 m_freem(nd.nd_mrep);
  268                                 goto out;
  269                         }
  270                 }
  271 
  272                 cacherep = nfs_proc(&nd, rqst->rq_xid, xprt, &rp);
  273                 NFSLOCKV4ROOTMUTEX();
  274                 nfsv4_relref(&nfsd_suspend_lock);
  275                 NFSUNLOCKV4ROOTMUTEX();
  276         } else {
  277                 NFSMGET(nd.nd_mreq);
  278                 nd.nd_mreq->m_len = 0;
  279                 cacherep = RC_REPLY;
  280         }
  281         if (nd.nd_mrep != NULL)
  282                 m_freem(nd.nd_mrep);
  283 
  284         if (nd.nd_cred != NULL)
  285                 crfree(nd.nd_cred);
  286 
  287         if (cacherep == RC_DROPIT) {
  288                 if (nd.nd_mreq != NULL)
  289                         m_freem(nd.nd_mreq);
  290                 svc_freereq(rqst);
  291                 goto out;
  292         }
  293 
  294         if (nd.nd_mreq == NULL) {
  295                 svcerr_decode(rqst);
  296                 svc_freereq(rqst);
  297                 goto out;
  298         }
  299 
  300         if (nd.nd_repstat & NFSERR_AUTHERR) {
  301                 svcerr_auth(rqst, nd.nd_repstat & ~NFSERR_AUTHERR);
  302                 if (nd.nd_mreq != NULL)
  303                         m_freem(nd.nd_mreq);
  304         } else if (!svc_sendreply_mbuf(rqst, nd.nd_mreq)) {
  305                 svcerr_systemerr(rqst);
  306         }
  307         if (rp != NULL) {
  308                 nfsrvd_sentcache(rp, (rqst->rq_reply_seq != 0 ||
  309                     SVC_ACK(xprt, NULL)), rqst->rq_reply_seq);
  310         }
  311         svc_freereq(rqst);
  312 
  313 out:
  314         td_softdep_cleanup(curthread);
  315         NFSEXITCODE(0);
  316 }
  317 
  318 /*
  319  * Check the cache and, optionally, do the RPC.
  320  * Return the appropriate cache response.
  321  */
  322 static int
  323 nfs_proc(struct nfsrv_descript *nd, u_int32_t xid, SVCXPRT *xprt,
  324     struct nfsrvcache **rpp)
  325 {
  326         struct thread *td = curthread;
  327         int cacherep = RC_DOIT, isdgram, taglen = -1;
  328         struct mbuf *m;
  329         u_char tag[NFSV4_SMALLSTR + 1], *tagstr = NULL;
  330         u_int32_t minorvers = 0;
  331         uint32_t ack;
  332 
  333         *rpp = NULL;
  334         if (nd->nd_nam2 == NULL) {
  335                 nd->nd_flag |= ND_STREAMSOCK;
  336                 isdgram = 0;
  337         } else {
  338                 isdgram = 1;
  339         }
  340 
  341         /*
  342          * Two cases:
  343          * 1 - For NFSv2 over UDP, if we are near our malloc/mget
  344          *     limit, just drop the request. There is no
  345          *     NFSERR_RESOURCE or NFSERR_DELAY for NFSv2 and the
  346          *     client will timeout/retry over UDP in a little while.
  347          * 2 - nd_repstat == 0 && nd_mreq == NULL, which
  348          *     means a normal nfs rpc, so check the cache
  349          */
  350         if ((nd->nd_flag & ND_NFSV2) && nd->nd_nam2 != NULL &&
  351             nfsrv_mallocmget_limit()) {
  352                 cacherep = RC_DROPIT;
  353         } else {
  354                 /*
  355                  * For NFSv3, play it safe and assume that the client is
  356                  * doing retries on the same TCP connection.
  357                  */
  358                 if ((nd->nd_flag & (ND_NFSV4 | ND_STREAMSOCK)) ==
  359                     ND_STREAMSOCK)
  360                         nd->nd_flag |= ND_SAMETCPCONN;
  361                 nd->nd_retxid = xid;
  362                 nd->nd_tcpconntime = NFSD_MONOSEC;
  363                 nd->nd_sockref = xprt->xp_sockref;
  364                 if ((nd->nd_flag & ND_NFSV4) != 0)
  365                         nfsd_getminorvers(nd, tag, &tagstr, &taglen,
  366                             &minorvers);
  367                 if ((nd->nd_flag & ND_NFSV41) != 0)
  368                         /* NFSv4.1 caches replies in the session slots. */
  369                         cacherep = RC_DOIT;
  370                 else {
  371                         cacherep = nfsrvd_getcache(nd);
  372                         ack = 0;
  373                         SVC_ACK(xprt, &ack);
  374                         nfsrc_trimcache(xprt->xp_sockref, ack, 0);
  375                 }
  376         }
  377 
  378         /*
  379          * Handle the request. There are three cases.
  380          * RC_DOIT - do the RPC
  381          * RC_REPLY - return the reply already created
  382          * RC_DROPIT - just throw the request away
  383          */
  384         if (cacherep == RC_DOIT) {
  385                 if ((nd->nd_flag & ND_NFSV41) != 0)
  386                         nd->nd_xprt = xprt;
  387                 nfsrvd_dorpc(nd, isdgram, tagstr, taglen, minorvers, td);
  388                 if ((nd->nd_flag & ND_NFSV41) != 0) {
  389                         if (nd->nd_repstat != NFSERR_REPLYFROMCACHE &&
  390                             (nd->nd_flag & ND_SAVEREPLY) != 0) {
  391                                 /* Cache a copy of the reply. */
  392                                 m = m_copym(nd->nd_mreq, 0, M_COPYALL,
  393                                     M_WAITOK);
  394                         } else
  395                                 m = NULL;
  396                         if ((nd->nd_flag & ND_HASSEQUENCE) != 0)
  397                                 nfsrv_cache_session(nd->nd_sessionid,
  398                                     nd->nd_slotid, nd->nd_repstat, &m);
  399                         if (nd->nd_repstat == NFSERR_REPLYFROMCACHE)
  400                                 nd->nd_repstat = 0;
  401                         cacherep = RC_REPLY;
  402                 } else {
  403                         if (nd->nd_repstat == NFSERR_DONTREPLY)
  404                                 cacherep = RC_DROPIT;
  405                         else
  406                                 cacherep = RC_REPLY;
  407                         *rpp = nfsrvd_updatecache(nd);
  408                 }
  409         }
  410         if (tagstr != NULL && taglen > NFSV4_SMALLSTR)
  411                 free(tagstr, M_TEMP);
  412 
  413         NFSEXITCODE2(0, nd);
  414         return (cacherep);
  415 }
  416 
  417 static void
  418 nfssvc_loss(SVCXPRT *xprt)
  419 {
  420         uint32_t ack;
  421 
  422         ack = 0;
  423         SVC_ACK(xprt, &ack);
  424         nfsrc_trimcache(xprt->xp_sockref, ack, 1);
  425 }
  426 
  427 /*
  428  * Adds a socket to the list for servicing by nfsds.
  429  */
  430 int
  431 nfsrvd_addsock(struct file *fp)
  432 {
  433         int siz;
  434         struct socket *so;
  435         int error = 0;
  436         SVCXPRT *xprt;
  437         static u_int64_t sockref = 0;
  438 
  439         so = fp->f_data;
  440 
  441         siz = sb_max_adj;
  442         error = soreserve(so, siz, siz);
  443         if (error)
  444                 goto out;
  445 
  446         /*
  447          * Steal the socket from userland so that it doesn't close
  448          * unexpectedly.
  449          */
  450         if (so->so_type == SOCK_DGRAM)
  451                 xprt = svc_dg_create(nfsrvd_pool, so, 0, 0);
  452         else
  453                 xprt = svc_vc_create(nfsrvd_pool, so, 0, 0);
  454         if (xprt) {
  455                 fp->f_ops = &badfileops;
  456                 fp->f_data = NULL;
  457                 xprt->xp_sockref = ++sockref;
  458                 if (nfs_minvers == NFS_VER2)
  459                         svc_reg(xprt, NFS_PROG, NFS_VER2, nfssvc_program,
  460                             NULL);
  461                 if (nfs_minvers <= NFS_VER3 && nfs_maxvers >= NFS_VER3)
  462                         svc_reg(xprt, NFS_PROG, NFS_VER3, nfssvc_program,
  463                             NULL);
  464                 if (nfs_maxvers >= NFS_VER4)
  465                         svc_reg(xprt, NFS_PROG, NFS_VER4, nfssvc_program,
  466                             NULL);
  467                 if (so->so_type == SOCK_STREAM)
  468                         svc_loss_reg(xprt, nfssvc_loss);
  469                 SVC_RELEASE(xprt);
  470         }
  471 
  472 out:
  473         NFSEXITCODE(error);
  474         return (error);
  475 }
  476 
  477 /*
  478  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
  479  * until it is killed by a signal.
  480  */
  481 int
  482 nfsrvd_nfsd(struct thread *td, struct nfsd_nfsd_args *args)
  483 {
  484         char principal[MAXHOSTNAMELEN + 5];
  485         struct proc *p;
  486         int error = 0;
  487         bool_t ret2, ret3, ret4;
  488 
  489         error = copyinstr(args->principal, principal, sizeof (principal),
  490             NULL);
  491         if (error)
  492                 goto out;
  493 
  494         /*
  495          * Only the first nfsd actually does any work. The RPC code
  496          * adds threads to it as needed. Any extra processes offered
  497          * by nfsd just exit. If nfsd is new enough, it will call us
  498          * once with a structure that specifies how many threads to
  499          * use.
  500          */
  501         NFSD_LOCK();
  502         if (newnfs_numnfsd == 0) {
  503                 nfsdev_time = time_second;
  504                 p = td->td_proc;
  505                 PROC_LOCK(p);
  506                 p->p_flag2 |= P2_AST_SU;
  507                 PROC_UNLOCK(p);
  508                 newnfs_numnfsd++;
  509 
  510                 NFSD_UNLOCK();
  511                 error = nfsrv_createdevids(args, td);
  512                 if (error == 0) {
  513                         /* An empty string implies AUTH_SYS only. */
  514                         if (principal[0] != '\0') {
  515                                 ret2 = rpc_gss_set_svc_name_call(principal,
  516                                     "kerberosv5", GSS_C_INDEFINITE, NFS_PROG,
  517                                     NFS_VER2);
  518                                 ret3 = rpc_gss_set_svc_name_call(principal,
  519                                     "kerberosv5", GSS_C_INDEFINITE, NFS_PROG,
  520                                     NFS_VER3);
  521                                 ret4 = rpc_gss_set_svc_name_call(principal,
  522                                     "kerberosv5", GSS_C_INDEFINITE, NFS_PROG,
  523                                     NFS_VER4);
  524         
  525                                 if (!ret2 || !ret3 || !ret4)
  526                                         printf(
  527                                             "nfsd: can't register svc name\n");
  528                         }
  529         
  530                         nfsrvd_pool->sp_minthreads = args->minthreads;
  531                         nfsrvd_pool->sp_maxthreads = args->maxthreads;
  532                                 
  533                         /*
  534                          * If this is a pNFS service, make Getattr do a
  535                          * vn_start_write(), so it can do a vn_set_extattr().
  536                          */
  537                         if (nfsrv_devidcnt > 0) {
  538                                 nfsrv_writerpc[NFSPROC_GETATTR] = 1;
  539                                 nfsv4_opflag[NFSV4OP_GETATTR].modifyfs = 1;
  540                         }
  541 
  542                         svc_run(nfsrvd_pool);
  543         
  544                         /* Reset Getattr to not do a vn_start_write(). */
  545                         nfsrv_writerpc[NFSPROC_GETATTR] = 0;
  546                         nfsv4_opflag[NFSV4OP_GETATTR].modifyfs = 0;
  547 
  548                         if (principal[0] != '\0') {
  549                                 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER2);
  550                                 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER3);
  551                                 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER4);
  552                         }
  553                 }
  554                 NFSD_LOCK();
  555                 newnfs_numnfsd--;
  556                 nfsrvd_init(1);
  557                 PROC_LOCK(p);
  558                 p->p_flag2 &= ~P2_AST_SU;
  559                 PROC_UNLOCK(p);
  560         }
  561         NFSD_UNLOCK();
  562 
  563 out:
  564         NFSEXITCODE(error);
  565         return (error);
  566 }
  567 
  568 /*
  569  * Initialize the data structures for the server.
  570  * Handshake with any new nfsds starting up to avoid any chance of
  571  * corruption.
  572  */
  573 void
  574 nfsrvd_init(int terminating)
  575 {
  576 
  577         NFSD_LOCK_ASSERT();
  578 
  579         if (terminating) {
  580                 nfsd_master_proc = NULL;
  581                 NFSD_UNLOCK();
  582                 nfsrv_freealllayoutsanddevids();
  583                 nfsrv_freeallbackchannel_xprts();
  584                 svcpool_close(nfsrvd_pool);
  585                 free(nfsrv_zeropnfsdat, M_TEMP);
  586                 nfsrv_zeropnfsdat = NULL;
  587                 NFSD_LOCK();
  588         } else {
  589                 NFSD_UNLOCK();
  590                 nfsrvd_pool = svcpool_create("nfsd",
  591                     SYSCTL_STATIC_CHILDREN(_vfs_nfsd));
  592                 nfsrvd_pool->sp_rcache = NULL;
  593                 nfsrvd_pool->sp_assign = fhanew_assign;
  594                 nfsrvd_pool->sp_done = fha_nd_complete;
  595                 NFSD_LOCK();
  596         }
  597 }
  598
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FreeBSD/Linux Kernel Cross Reference sys/fs/nfsserver/nfs_nfsdkrpc.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/nfsserver/nfs_nfsdkrpc.c
