The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/fs/nfs/nfs_commonport.c

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    1 /*-
    2  * Copyright (c) 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * Rick Macklem at The University of Guelph.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/10.4/sys/fs/nfs/nfs_commonport.c 317404 2017-04-25 11:36:25Z rmacklem $");
   36 
   37 /*
   38  * Functions that need to be different for different versions of BSD
   39  * kernel should be kept here, along with any global storage specific
   40  * to this BSD variant.
   41  */
   42 #include <fs/nfs/nfsport.h>
   43 #include <sys/sysctl.h>
   44 #include <vm/vm.h>
   45 #include <vm/vm_object.h>
   46 #include <vm/vm_page.h>
   47 #include <vm/vm_param.h>
   48 #include <vm/vm_map.h>
   49 #include <vm/vm_kern.h>
   50 #include <vm/vm_extern.h>
   51 #include <vm/uma.h>
   52 
   53 extern int nfscl_ticks;
   54 extern int nfsrv_nfsuserd;
   55 extern struct nfssockreq nfsrv_nfsuserdsock;
   56 extern void (*nfsd_call_recall)(struct vnode *, int, struct ucred *,
   57     struct thread *);
   58 extern int nfsrv_useacl;
   59 struct mount nfsv4root_mnt;
   60 int newnfs_numnfsd = 0;
   61 struct nfsstats newnfsstats;
   62 int nfs_numnfscbd = 0;
   63 int nfscl_debuglevel = 0;
   64 char nfsv4_callbackaddr[INET6_ADDRSTRLEN];
   65 struct callout newnfsd_callout;
   66 int nfsrv_lughashsize = 100;
   67 void (*nfsd_call_servertimer)(void) = NULL;
   68 void (*ncl_call_invalcaches)(struct vnode *) = NULL;
   69 
   70 static int nfs_realign_test;
   71 static int nfs_realign_count;
   72 
   73 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "New NFS filesystem");
   74 SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_test, CTLFLAG_RW, &nfs_realign_test,
   75     0, "Number of realign tests done");
   76 SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_count, CTLFLAG_RW, &nfs_realign_count,
   77     0, "Number of mbuf realignments done");
   78 SYSCTL_STRING(_vfs_nfs, OID_AUTO, callback_addr, CTLFLAG_RW,
   79     nfsv4_callbackaddr, sizeof(nfsv4_callbackaddr),
   80     "NFSv4 callback addr for server to use");
   81 SYSCTL_INT(_vfs_nfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nfscl_debuglevel,
   82     0, "Debug level for new nfs client");
   83 TUNABLE_INT("vfs.nfs.userhashsize", &nfsrv_lughashsize);
   84 SYSCTL_INT(_vfs_nfs, OID_AUTO, userhashsize, CTLFLAG_RDTUN, &nfsrv_lughashsize,
   85     0, "Size of hash tables for uid/name mapping");
   86 
   87 /*
   88  * Defines for malloc
   89  * (Here for FreeBSD, since they allocate storage.)
   90  */
   91 MALLOC_DEFINE(M_NEWNFSRVCACHE, "NFSD srvcache", "NFSD Server Request Cache");
   92 MALLOC_DEFINE(M_NEWNFSDCLIENT, "NFSD V4client", "NFSD V4 Client Id");
   93 MALLOC_DEFINE(M_NEWNFSDSTATE, "NFSD V4state",
   94     "NFSD V4 State (Openowner, Open, Lockowner, Delegation");
   95 MALLOC_DEFINE(M_NEWNFSDLOCK, "NFSD V4lock", "NFSD V4 byte range lock");
   96 MALLOC_DEFINE(M_NEWNFSDLOCKFILE, "NFSD lckfile", "NFSD Open/Lock file");
   97 MALLOC_DEFINE(M_NEWNFSSTRING, "NFSD string", "NFSD V4 long string");
   98 MALLOC_DEFINE(M_NEWNFSUSERGROUP, "NFSD usrgroup", "NFSD V4 User/group map");
   99 MALLOC_DEFINE(M_NEWNFSDREQ, "NFS req", "NFS request header");
  100 MALLOC_DEFINE(M_NEWNFSFH, "NFS fh", "NFS file handle");
  101 MALLOC_DEFINE(M_NEWNFSCLOWNER, "NFSCL owner", "NFSCL Open Owner");
  102 MALLOC_DEFINE(M_NEWNFSCLOPEN, "NFSCL open", "NFSCL Open");
  103 MALLOC_DEFINE(M_NEWNFSCLDELEG, "NFSCL deleg", "NFSCL Delegation");
  104 MALLOC_DEFINE(M_NEWNFSCLCLIENT, "NFSCL client", "NFSCL Client");
  105 MALLOC_DEFINE(M_NEWNFSCLLOCKOWNER, "NFSCL lckown", "NFSCL Lock Owner");
  106 MALLOC_DEFINE(M_NEWNFSCLLOCK, "NFSCL lck", "NFSCL Lock");
  107 MALLOC_DEFINE(M_NEWNFSV4NODE, "NEWNFSnode", "New nfs vnode");
  108 MALLOC_DEFINE(M_NEWNFSDIRECTIO, "NEWdirectio", "New nfs Direct IO buffer");
  109 MALLOC_DEFINE(M_NEWNFSDIROFF, "NFSCL diroffdiroff",
  110     "New NFS directory offset data");
  111 MALLOC_DEFINE(M_NEWNFSDROLLBACK, "NFSD rollback",
  112     "New NFS local lock rollback");
  113 MALLOC_DEFINE(M_NEWNFSLAYOUT, "NFSCL layout", "NFSv4.1 Layout");
  114 MALLOC_DEFINE(M_NEWNFSFLAYOUT, "NFSCL flayout", "NFSv4.1 File Layout");
  115 MALLOC_DEFINE(M_NEWNFSDEVINFO, "NFSCL devinfo", "NFSv4.1 Device Info");
  116 MALLOC_DEFINE(M_NEWNFSSOCKREQ, "NFSCL sockreq", "NFS Sock Req");
  117 MALLOC_DEFINE(M_NEWNFSCLDS, "NFSCL session", "NFSv4.1 Session");
  118 MALLOC_DEFINE(M_NEWNFSLAYRECALL, "NFSCL layrecall", "NFSv4.1 Layout Recall");
  119 MALLOC_DEFINE(M_NEWNFSDSESSION, "NFSD session", "NFSD Session for a client");
  120 
  121 /*
  122  * Definition of mutex locks.
  123  * newnfsd_mtx is used in nfsrvd_nfsd() to protect the nfs socket list
  124  * and assorted other nfsd structures.
  125  */
  126 struct mtx newnfsd_mtx;
  127 struct mtx nfs_sockl_mutex;
  128 struct mtx nfs_state_mutex;
  129 struct mtx nfs_nameid_mutex;
  130 struct mtx nfs_req_mutex;
  131 struct mtx nfs_slock_mutex;
  132 struct mtx nfs_clstate_mutex;
  133 
  134 /* local functions */
  135 static int nfssvc_call(struct thread *, struct nfssvc_args *, struct ucred *);
  136 
  137 #ifdef __NO_STRICT_ALIGNMENT
  138 /*
  139  * These architectures don't need re-alignment, so just return.
  140  */
  141 int
  142 newnfs_realign(struct mbuf **pm, int how)
  143 {
  144 
  145         return (0);
  146 }
  147 #else   /* !__NO_STRICT_ALIGNMENT */
  148 /*
  149  *      newnfs_realign:
  150  *
  151  *      Check for badly aligned mbuf data and realign by copying the unaligned
  152  *      portion of the data into a new mbuf chain and freeing the portions
  153  *      of the old chain that were replaced.
  154  *
  155  *      We cannot simply realign the data within the existing mbuf chain
  156  *      because the underlying buffers may contain other rpc commands and
  157  *      we cannot afford to overwrite them.
  158  *
  159  *      We would prefer to avoid this situation entirely.  The situation does
  160  *      not occur with NFS/UDP and is supposed to only occassionally occur
  161  *      with TCP.  Use vfs.nfs.realign_count and realign_test to check this.
  162  *
  163  */
  164 int
  165 newnfs_realign(struct mbuf **pm, int how)
  166 {
  167         struct mbuf *m, *n;
  168         int off, space;
  169 
  170         ++nfs_realign_test;
  171         while ((m = *pm) != NULL) {
  172                 if ((m->m_len & 0x3) || (mtod(m, intptr_t) & 0x3)) {
  173                         /*
  174                          * NB: we can't depend on m_pkthdr.len to help us
  175                          * decide what to do here.  May not be worth doing
  176                          * the m_length calculation as m_copyback will
  177                          * expand the mbuf chain below as needed.
  178                          */
  179                         space = m_length(m, NULL);
  180                         if (space >= MINCLSIZE) {
  181                                 /* NB: m_copyback handles space > MCLBYTES */
  182                                 n = m_getcl(how, MT_DATA, 0);
  183                         } else
  184                                 n = m_get(how, MT_DATA);
  185                         if (n == NULL)
  186                                 return (ENOMEM);
  187                         /*
  188                          * Align the remainder of the mbuf chain.
  189                          */
  190                         n->m_len = 0;
  191                         off = 0;
  192                         while (m != NULL) {
  193                                 m_copyback(n, off, m->m_len, mtod(m, caddr_t));
  194                                 off += m->m_len;
  195                                 m = m->m_next;
  196                         }
  197                         m_freem(*pm);
  198                         *pm = n;
  199                         ++nfs_realign_count;
  200                         break;
  201                 }
  202                 pm = &m->m_next;
  203         }
  204 
  205         return (0);
  206 }
  207 #endif  /* __NO_STRICT_ALIGNMENT */
  208 
  209 #ifdef notdef
  210 static void
  211 nfsrv_object_create(struct vnode *vp, struct thread *td)
  212 {
  213 
  214         if (vp == NULL || vp->v_type != VREG)
  215                 return;
  216         (void) vfs_object_create(vp, td, td->td_ucred);
  217 }
  218 #endif
  219 
  220 /*
  221  * Look up a file name. Basically just initialize stuff and call namei().
  222  */
  223 int
  224 nfsrv_lookupfilename(struct nameidata *ndp, char *fname, NFSPROC_T *p)
  225 {
  226         int error;
  227 
  228         NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, fname,
  229             p);
  230         error = namei(ndp);
  231         if (!error) {
  232                 NDFREE(ndp, NDF_ONLY_PNBUF);
  233         }
  234         return (error);
  235 }
  236 
  237 /*
  238  * Copy NFS uid, gids to the cred structure.
  239  */
  240 void
  241 newnfs_copycred(struct nfscred *nfscr, struct ucred *cr)
  242 {
  243 
  244         KASSERT(nfscr->nfsc_ngroups >= 0,
  245             ("newnfs_copycred: negative nfsc_ngroups"));
  246         cr->cr_uid = nfscr->nfsc_uid;
  247         crsetgroups(cr, nfscr->nfsc_ngroups, nfscr->nfsc_groups);
  248 }
  249 
  250 /*
  251  * Map args from nfsmsleep() to msleep().
  252  */
  253 int
  254 nfsmsleep(void *chan, void *mutex, int prio, const char *wmesg,
  255     struct timespec *ts)
  256 {
  257         u_int64_t nsecval;
  258         int error, timeo;
  259 
  260         if (ts) {
  261                 timeo = hz * ts->tv_sec;
  262                 nsecval = (u_int64_t)ts->tv_nsec;
  263                 nsecval = ((nsecval * ((u_int64_t)hz)) + 500000000) /
  264                     1000000000;
  265                 timeo += (int)nsecval;
  266         } else {
  267                 timeo = 0;
  268         }
  269         error = msleep(chan, (struct mtx *)mutex, prio, wmesg, timeo);
  270         return (error);
  271 }
  272 
  273 /*
  274  * Get the file system info for the server. For now, just assume FFS.
  275  */
  276 void
  277 nfsvno_getfs(struct nfsfsinfo *sip, int isdgram)
  278 {
  279         int pref;
  280 
  281         /*
  282          * XXX
  283          * There should be file system VFS OP(s) to get this information.
  284          * For now, assume ufs.
  285          */
  286         if (isdgram)
  287                 pref = NFS_MAXDGRAMDATA;
  288         else
  289                 pref = NFS_SRVMAXIO;
  290         sip->fs_rtmax = NFS_SRVMAXIO;
  291         sip->fs_rtpref = pref;
  292         sip->fs_rtmult = NFS_FABLKSIZE;
  293         sip->fs_wtmax = NFS_SRVMAXIO;
  294         sip->fs_wtpref = pref;
  295         sip->fs_wtmult = NFS_FABLKSIZE;
  296         sip->fs_dtpref = pref;
  297         sip->fs_maxfilesize = 0xffffffffffffffffull;
  298         sip->fs_timedelta.tv_sec = 0;
  299         sip->fs_timedelta.tv_nsec = 1;
  300         sip->fs_properties = (NFSV3FSINFO_LINK |
  301             NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
  302             NFSV3FSINFO_CANSETTIME);
  303 }
  304 
  305 /*
  306  * Do the pathconf vnode op.
  307  */
  308 int
  309 nfsvno_pathconf(struct vnode *vp, int flag, register_t *retf,
  310     struct ucred *cred, struct thread *p)
  311 {
  312         int error;
  313 
  314         error = VOP_PATHCONF(vp, flag, retf);
  315         if (error == EOPNOTSUPP || error == EINVAL) {
  316                 /*
  317                  * Some file systems return EINVAL for name arguments not
  318                  * supported and some return EOPNOTSUPP for this case.
  319                  * So the NFSv3 Pathconf RPC doesn't fail for these cases,
  320                  * just fake them.
  321                  */
  322                 switch (flag) {
  323                 case _PC_LINK_MAX:
  324                         *retf = LINK_MAX;
  325                         break;
  326                 case _PC_NAME_MAX:
  327                         *retf = NAME_MAX;
  328                         break;
  329                 case _PC_CHOWN_RESTRICTED:
  330                         *retf = 1;
  331                         break;
  332                 case _PC_NO_TRUNC:
  333                         *retf = 1;
  334                         break;
  335                 default:
  336                         /*
  337                          * Only happens if a _PC_xxx is added to the server,
  338                          * but this isn't updated.
  339                          */
  340                         *retf = 0;
  341                         printf("nfsrvd pathconf flag=%d not supp\n", flag);
  342                 };
  343                 error = 0;
  344         }
  345         NFSEXITCODE(error);
  346         return (error);
  347 }
  348 
  349 /* Fake nfsrv_atroot. Just return 0 */
  350 int
  351 nfsrv_atroot(struct vnode *vp, long *retp)
  352 {
  353 
  354         return (0);
  355 }
  356 
  357 /*
  358  * Set the credentials to refer to root.
  359  * If only the various BSDen could agree on whether cr_gid is a separate
  360  * field or cr_groups[0]...
  361  */
  362 void
  363 newnfs_setroot(struct ucred *cred)
  364 {
  365 
  366         cred->cr_uid = 0;
  367         cred->cr_groups[0] = 0;
  368         cred->cr_ngroups = 1;
  369 }
  370 
  371 /*
  372  * Get the client credential. Used for Renew and recovery.
  373  */
  374 struct ucred *
  375 newnfs_getcred(void)
  376 {
  377         struct ucred *cred;
  378         struct thread *td = curthread;
  379 
  380         cred = crdup(td->td_ucred);
  381         newnfs_setroot(cred);
  382         return (cred);
  383 }
  384 
  385 /*
  386  * Nfs timer routine
  387  * Call the nfsd's timer function once/sec.
  388  */
  389 void
  390 newnfs_timer(void *arg)
  391 {
  392         static time_t lasttime = 0;
  393         /*
  394          * Call the server timer, if set up.
  395          * The argument indicates if it is the next second and therefore
  396          * leases should be checked.
  397          */
  398         if (lasttime != NFSD_MONOSEC) {
  399                 lasttime = NFSD_MONOSEC;
  400                 if (nfsd_call_servertimer != NULL)
  401                         (*nfsd_call_servertimer)();
  402         }
  403         callout_reset(&newnfsd_callout, nfscl_ticks, newnfs_timer, NULL);
  404 }
  405 
  406 
  407 /*
  408  * Sleep for a short period of time unless errval == NFSERR_GRACE, where
  409  * the sleep should be for 5 seconds.
  410  * Since lbolt doesn't exist in FreeBSD-CURRENT, just use a timeout on
  411  * an event that never gets a wakeup. Only return EINTR or 0.
  412  */
  413 int
  414 nfs_catnap(int prio, int errval, const char *wmesg)
  415 {
  416         static int non_event;
  417         int ret;
  418 
  419         if (errval == NFSERR_GRACE)
  420                 ret = tsleep(&non_event, prio, wmesg, 5 * hz);
  421         else
  422                 ret = tsleep(&non_event, prio, wmesg, 1);
  423         if (ret != EINTR)
  424                 ret = 0;
  425         return (ret);
  426 }
  427 
  428 /*
  429  * Get referral. For now, just fail.
  430  */
  431 struct nfsreferral *
  432 nfsv4root_getreferral(struct vnode *vp, struct vnode *dvp, u_int32_t fileno)
  433 {
  434 
  435         return (NULL);
  436 }
  437 
  438 static int
  439 nfssvc_nfscommon(struct thread *td, struct nfssvc_args *uap)
  440 {
  441         int error;
  442 
  443         error = nfssvc_call(td, uap, td->td_ucred);
  444         NFSEXITCODE(error);
  445         return (error);
  446 }
  447 
  448 static int
  449 nfssvc_call(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
  450 {
  451         int error = EINVAL;
  452         struct nfsd_idargs nid;
  453         struct nfsd_oidargs onid;
  454 
  455         if (uap->flag & NFSSVC_IDNAME) {
  456                 if ((uap->flag & NFSSVC_NEWSTRUCT) != 0)
  457                         error = copyin(uap->argp, &nid, sizeof(nid));
  458                 else {
  459                         error = copyin(uap->argp, &onid, sizeof(onid));
  460                         if (error == 0) {
  461                                 nid.nid_flag = onid.nid_flag;
  462                                 nid.nid_uid = onid.nid_uid;
  463                                 nid.nid_gid = onid.nid_gid;
  464                                 nid.nid_usermax = onid.nid_usermax;
  465                                 nid.nid_usertimeout = onid.nid_usertimeout;
  466                                 nid.nid_name = onid.nid_name;
  467                                 nid.nid_namelen = onid.nid_namelen;
  468                                 nid.nid_ngroup = 0;
  469                                 nid.nid_grps = NULL;
  470                         }
  471                 }
  472                 if (error)
  473                         goto out;
  474                 error = nfssvc_idname(&nid);
  475                 goto out;
  476         } else if (uap->flag & NFSSVC_GETSTATS) {
  477                 error = copyout(&newnfsstats,
  478                     CAST_USER_ADDR_T(uap->argp), sizeof (newnfsstats));
  479                 if (error == 0) {
  480                         if ((uap->flag & NFSSVC_ZEROCLTSTATS) != 0) {
  481                                 newnfsstats.attrcache_hits = 0;
  482                                 newnfsstats.attrcache_misses = 0;
  483                                 newnfsstats.lookupcache_hits = 0;
  484                                 newnfsstats.lookupcache_misses = 0;
  485                                 newnfsstats.direofcache_hits = 0;
  486                                 newnfsstats.direofcache_misses = 0;
  487                                 newnfsstats.accesscache_hits = 0;
  488                                 newnfsstats.accesscache_misses = 0;
  489                                 newnfsstats.biocache_reads = 0;
  490                                 newnfsstats.read_bios = 0;
  491                                 newnfsstats.read_physios = 0;
  492                                 newnfsstats.biocache_writes = 0;
  493                                 newnfsstats.write_bios = 0;
  494                                 newnfsstats.write_physios = 0;
  495                                 newnfsstats.biocache_readlinks = 0;
  496                                 newnfsstats.readlink_bios = 0;
  497                                 newnfsstats.biocache_readdirs = 0;
  498                                 newnfsstats.readdir_bios = 0;
  499                                 newnfsstats.rpcretries = 0;
  500                                 newnfsstats.rpcrequests = 0;
  501                                 newnfsstats.rpctimeouts = 0;
  502                                 newnfsstats.rpcunexpected = 0;
  503                                 newnfsstats.rpcinvalid = 0;
  504                                 bzero(newnfsstats.rpccnt,
  505                                     sizeof(newnfsstats.rpccnt));
  506                         }
  507                         if ((uap->flag & NFSSVC_ZEROSRVSTATS) != 0) {
  508                                 newnfsstats.srvrpc_errs = 0;
  509                                 newnfsstats.srv_errs = 0;
  510                                 newnfsstats.srvcache_inproghits = 0;
  511                                 newnfsstats.srvcache_idemdonehits = 0;
  512                                 newnfsstats.srvcache_nonidemdonehits = 0;
  513                                 newnfsstats.srvcache_misses = 0;
  514                                 newnfsstats.srvcache_tcppeak = 0;
  515                                 newnfsstats.srvclients = 0;
  516                                 newnfsstats.srvopenowners = 0;
  517                                 newnfsstats.srvopens = 0;
  518                                 newnfsstats.srvlockowners = 0;
  519                                 newnfsstats.srvlocks = 0;
  520                                 newnfsstats.srvdelegates = 0;
  521                                 newnfsstats.clopenowners = 0;
  522                                 newnfsstats.clopens = 0;
  523                                 newnfsstats.cllockowners = 0;
  524                                 newnfsstats.cllocks = 0;
  525                                 newnfsstats.cldelegates = 0;
  526                                 newnfsstats.cllocalopenowners = 0;
  527                                 newnfsstats.cllocalopens = 0;
  528                                 newnfsstats.cllocallockowners = 0;
  529                                 newnfsstats.cllocallocks = 0;
  530                                 bzero(newnfsstats.srvrpccnt,
  531                                     sizeof(newnfsstats.srvrpccnt));
  532                                 bzero(newnfsstats.cbrpccnt,
  533                                     sizeof(newnfsstats.cbrpccnt));
  534                         }
  535                 }
  536                 goto out;
  537         } else if (uap->flag & NFSSVC_NFSUSERDPORT) {
  538                 u_short sockport;
  539 
  540                 error = copyin(uap->argp, (caddr_t)&sockport,
  541                     sizeof (u_short));
  542                 if (!error)
  543                         error = nfsrv_nfsuserdport(sockport, p);
  544         } else if (uap->flag & NFSSVC_NFSUSERDDELPORT) {
  545                 nfsrv_nfsuserddelport();
  546                 error = 0;
  547         }
  548 
  549 out:
  550         NFSEXITCODE(error);
  551         return (error);
  552 }
  553 
  554 /*
  555  * called by all three modevent routines, so that it gets things
  556  * initialized soon enough.
  557  */
  558 void
  559 newnfs_portinit(void)
  560 {
  561         static int inited = 0;
  562 
  563         if (inited)
  564                 return;
  565         inited = 1;
  566         /* Initialize SMP locks used by both client and server. */
  567         mtx_init(&newnfsd_mtx, "newnfsd_mtx", NULL, MTX_DEF);
  568         mtx_init(&nfs_state_mutex, "nfs_state_mutex", NULL, MTX_DEF);
  569         mtx_init(&nfs_clstate_mutex, "nfs_clstate_mutex", NULL, MTX_DEF);
  570 }
  571 
  572 /*
  573  * Determine if the file system supports NFSv4 ACLs.
  574  * Return 1 if it does, 0 otherwise.
  575  */
  576 int
  577 nfs_supportsnfsv4acls(struct vnode *vp)
  578 {
  579         int error;
  580         register_t retval;
  581 
  582         ASSERT_VOP_LOCKED(vp, "nfs supports nfsv4acls");
  583 
  584         if (nfsrv_useacl == 0)
  585                 return (0);
  586         error = VOP_PATHCONF(vp, _PC_ACL_NFS4, &retval);
  587         if (error == 0 && retval != 0)
  588                 return (1);
  589         return (0);
  590 }
  591 
  592 extern int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *);
  593 
  594 /*
  595  * Called once to initialize data structures...
  596  */
  597 static int
  598 nfscommon_modevent(module_t mod, int type, void *data)
  599 {
  600         int error = 0;
  601         static int loaded = 0;
  602 
  603         switch (type) {
  604         case MOD_LOAD:
  605                 if (loaded)
  606                         goto out;
  607                 newnfs_portinit();
  608                 mtx_init(&nfs_nameid_mutex, "nfs_nameid_mutex", NULL, MTX_DEF);
  609                 mtx_init(&nfs_sockl_mutex, "nfs_sockl_mutex", NULL, MTX_DEF);
  610                 mtx_init(&nfs_slock_mutex, "nfs_slock_mutex", NULL, MTX_DEF);
  611                 mtx_init(&nfs_req_mutex, "nfs_req_mutex", NULL, MTX_DEF);
  612                 mtx_init(&nfsrv_nfsuserdsock.nr_mtx, "nfsuserd", NULL,
  613                     MTX_DEF);
  614                 callout_init(&newnfsd_callout, 1);
  615                 newnfs_init();
  616                 nfsd_call_nfscommon = nfssvc_nfscommon;
  617                 loaded = 1;
  618                 break;
  619 
  620         case MOD_UNLOAD:
  621                 if (newnfs_numnfsd != 0 || nfsrv_nfsuserd != 0 ||
  622                     nfs_numnfscbd != 0) {
  623                         error = EBUSY;
  624                         break;
  625                 }
  626 
  627                 nfsd_call_nfscommon = NULL;
  628                 callout_drain(&newnfsd_callout);
  629                 /* Clean out the name<-->id cache. */
  630                 nfsrv_cleanusergroup();
  631                 /* and get rid of the mutexes */
  632                 mtx_destroy(&nfs_nameid_mutex);
  633                 mtx_destroy(&newnfsd_mtx);
  634                 mtx_destroy(&nfs_state_mutex);
  635                 mtx_destroy(&nfs_clstate_mutex);
  636                 mtx_destroy(&nfs_sockl_mutex);
  637                 mtx_destroy(&nfs_slock_mutex);
  638                 mtx_destroy(&nfs_req_mutex);
  639                 mtx_destroy(&nfsrv_nfsuserdsock.nr_mtx);
  640                 loaded = 0;
  641                 break;
  642         default:
  643                 error = EOPNOTSUPP;
  644                 break;
  645         }
  646 
  647 out:
  648         NFSEXITCODE(error);
  649         return error;
  650 }
  651 static moduledata_t nfscommon_mod = {
  652         "nfscommon",
  653         nfscommon_modevent,
  654         NULL,
  655 };
  656 DECLARE_MODULE(nfscommon, nfscommon_mod, SI_SUB_VFS, SI_ORDER_ANY);
  657 
  658 /* So that loader and kldload(2) can find us, wherever we are.. */
  659 MODULE_VERSION(nfscommon, 1);
  660 MODULE_DEPEND(nfscommon, nfssvc, 1, 1, 1);
  661 MODULE_DEPEND(nfscommon, krpc, 1, 1, 1);
  662 

Cache object: 775b18cd667c9b2e4717f03a86ff7814


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