The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/nfs4client/nfs4_vfsops.c

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    1 /* $Id: nfs_vfsops.c,v 1.38 2003/11/05 14:59:01 rees Exp $ */
    2 
    3 /*-
    4  * copyright (c) 2003
    5  * the regents of the university of michigan
    6  * all rights reserved
    7  * 
    8  * permission is granted to use, copy, create derivative works and redistribute
    9  * this software and such derivative works for any purpose, so long as the name
   10  * of the university of michigan is not used in any advertising or publicity
   11  * pertaining to the use or distribution of this software without specific,
   12  * written prior authorization.  if the above copyright notice or any other
   13  * identification of the university of michigan is included in any copy of any
   14  * portion of this software, then the disclaimer below must also be included.
   15  * 
   16  * this software is provided as is, without representation from the university
   17  * of michigan as to its fitness for any purpose, and without warranty by the
   18  * university of michigan of any kind, either express or implied, including
   19  * without limitation the implied warranties of merchantability and fitness for
   20  * a particular purpose. the regents of the university of michigan shall not be
   21  * liable for any damages, including special, indirect, incidental, or
   22  * consequential damages, with respect to any claim arising out of or in
   23  * connection with the use of the software, even if it has been or is hereafter
   24  * advised of the possibility of such damages.
   25  */
   26 
   27 /*-
   28  * Copyright (c) 1989, 1993, 1995
   29  *      The Regents of the University of California.  All rights reserved.
   30  *
   31  * This code is derived from software contributed to Berkeley by
   32  * Rick Macklem at The University of Guelph.
   33  *
   34  * Redistribution and use in source and binary forms, with or without
   35  * modification, are permitted provided that the following conditions
   36  * are met:
   37  * 1. Redistributions of source code must retain the above copyright
   38  *    notice, this list of conditions and the following disclaimer.
   39  * 2. Redistributions in binary form must reproduce the above copyright
   40  *    notice, this list of conditions and the following disclaimer in the
   41  *    documentation and/or other materials provided with the distribution.
   42  * 4. Neither the name of the University nor the names of its contributors
   43  *    may be used to endorse or promote products derived from this software
   44  *    without specific prior written permission.
   45  *
   46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   56  * SUCH DAMAGE.
   57  *
   58  *      @(#)nfs_vfsops.c        8.12 (Berkeley) 5/20/95
   59  */
   60 
   61 #include <sys/cdefs.h>
   62 __FBSDID("$FreeBSD$");
   63 
   64 #include "opt_bootp.h"
   65 #include "opt_nfsroot.h"
   66 
   67 #include <sys/param.h>
   68 #include <sys/systm.h>
   69 #include <sys/kernel.h>
   70 #include <sys/kthread.h>
   71 #include <sys/limits.h>
   72 #include <sys/lock.h>
   73 #include <sys/malloc.h>
   74 #include <sys/mbuf.h>
   75 #include <sys/module.h>
   76 #include <sys/mount.h>
   77 #include <sys/proc.h>
   78 #include <sys/socket.h>
   79 #include <sys/socketvar.h>
   80 #include <sys/sockio.h>
   81 #include <sys/sysctl.h>
   82 #include <sys/unistd.h>
   83 #include <sys/vnode.h>
   84 #include <sys/signalvar.h>
   85 
   86 #include <vm/vm.h>
   87 #include <vm/vm_extern.h>
   88 #include <vm/uma.h>
   89 
   90 #include <net/if.h>
   91 #include <net/route.h>
   92 #include <netinet/in.h>
   93 #include <netinet/in_var.h>
   94 
   95 #include <rpc/rpcclnt.h>
   96 
   97 #include <nfs/rpcv2.h>
   98 #include <nfs/nfsproto.h>
   99 #include <nfsclient/nfs.h>
  100 #include <nfs4client/nfs4.h>
  101 #include <nfsclient/nfsnode.h>
  102 #include <nfsclient/nfsmount.h>
  103 #include <nfs/xdr_subs.h>
  104 #include <nfsclient/nfsm_subs.h>
  105 #include <nfsclient/nfsdiskless.h>
  106 
  107 #include <nfs4client/nfs4m_subs.h>
  108 #include <nfs4client/nfs4_vfs.h>
  109 
  110 #include <nfs4client/nfs4_dev.h>
  111 #include <nfs4client/nfs4_idmap.h>
  112 
  113 SYSCTL_NODE(_vfs, OID_AUTO, nfs4, CTLFLAG_RW, 0, "NFS4 filesystem");
  114 SYSCTL_STRUCT(_vfs_nfs4, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
  115         &nfsstats, nfsstats, "S,nfsstats");
  116 
  117 static void     nfs4_decode_args(struct nfsmount *nmp, struct nfs_args *argp);
  118 static void     nfs4_daemon(void *arg);
  119 static int      mountnfs(struct nfs_args *, struct mount *,
  120                     struct sockaddr *, char *, struct vnode **,
  121                     struct ucred *cred);
  122 static int      nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred);
  123 static vfs_mount_t nfs4_mount;
  124 static vfs_cmount_t nfs4_cmount;
  125 static vfs_unmount_t nfs4_unmount;
  126 static vfs_root_t nfs4_root;
  127 static vfs_statfs_t nfs4_statfs;
  128 static vfs_sync_t nfs4_sync;
  129 
  130 /*
  131  * nfs vfs operations.
  132  */
  133 static struct vfsops nfs4_vfsops = {
  134         .vfs_init =             nfs4_init,
  135         .vfs_mount =            nfs4_mount,
  136         .vfs_cmount =           nfs4_cmount,
  137         .vfs_root =             nfs4_root,
  138         .vfs_statfs =           nfs4_statfs,
  139         .vfs_sync =             nfs4_sync,
  140         .vfs_uninit =           nfs4_uninit,
  141         .vfs_unmount =          nfs4_unmount,
  142 };
  143 VFS_SET(nfs4_vfsops, nfs4, VFCF_NETWORK);
  144 
  145 static struct nfs_rpcops nfs4_rpcops = {
  146         nfs4_readrpc,
  147         nfs4_writerpc,
  148         nfs4_writebp,
  149         nfs4_readlinkrpc,
  150         nfs4_invaldir,
  151         nfs4_commit,
  152 };
  153 
  154 /* So that loader and kldload(2) can find us, wherever we are.. */
  155 MODULE_VERSION(nfs4, 1);
  156 
  157 void            nfsargs_ntoh(struct nfs_args *);
  158 
  159 int
  160 nfs4_init(struct vfsconf *vfsp)
  161 {
  162 
  163         rpcclnt_init();
  164         nfs4dev_init();
  165         idmap_init();
  166         nfsm_v4init();
  167 
  168         return (0);
  169 }
  170 
  171 int
  172 nfs4_uninit(struct vfsconf *vfsp)
  173 {
  174 
  175         rpcclnt_uninit();
  176         nfs4dev_uninit();
  177         idmap_uninit();
  178 
  179         return (0);
  180 }
  181 
  182 /*
  183  * nfs statfs call
  184  */
  185 static int
  186 nfs4_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
  187 {
  188         struct vnode *vp;
  189         struct nfs_statfs *sfp;
  190         caddr_t bpos, dpos;
  191         struct nfsmount *nmp = VFSTONFS(mp);
  192         int error = 0;
  193         struct mbuf *mreq, *mrep = NULL, *md, *mb;
  194         struct nfsnode *np;
  195         struct nfs4_compound cp;
  196         struct nfs4_oparg_getattr ga;
  197         struct nfsv4_fattr *fap = &ga.fa;
  198 
  199 #ifndef nolint
  200         sfp = NULL;
  201 #endif
  202         error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE);
  203         if (error)
  204                 return (error);
  205         vp = NFSTOV(np);
  206         nfsstats.rpccnt[NFSPROC_FSSTAT]++;
  207         mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1));
  208         mb = mreq;
  209         bpos = mtod(mb, caddr_t);
  210 
  211         ga.bm = &nfsv4_fsattrbm;
  212         nfs_v4initcompound(&cp);
  213 
  214         nfsm_v4build_compound(&cp, "statfs()");
  215         nfsm_v4build_putfh(&cp, vp);
  216         nfsm_v4build_getattr(&cp, &ga);
  217         nfsm_v4build_finalize(&cp);
  218 
  219         nfsm_request(vp, NFSV4PROC_COMPOUND, td, td->td_ucred);
  220         if (error != 0)
  221                 goto nfsmout;
  222 
  223         nfsm_v4dissect_compound(&cp);
  224         nfsm_v4dissect_putfh(&cp);
  225         nfsm_v4dissect_getattr(&cp, &ga);
  226 
  227         nfs4_vfsop_statfs(fap, sbp, mp);
  228 
  229 nfsmout:
  230         error = nfs_v4postop(&cp, error);
  231 
  232         vput(vp);
  233         if (mrep != NULL)
  234                 m_freem(mrep);
  235 
  236         return (error);
  237 }
  238 
  239 static void
  240 nfs4_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
  241 {
  242         int s;
  243         int adjsock;
  244         int maxio;
  245 
  246         s = splnet();
  247 
  248         /*
  249          * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
  250          * no sense in that context.  Also, set appropriate retransmit
  251          * and soft timeout behavior.
  252          */
  253         if (argp->sotype == SOCK_STREAM) {
  254                 nmp->nm_flag &= ~NFSMNT_NOCONN;
  255                 nmp->nm_flag |= NFSMNT_DUMBTIMR;
  256                 nmp->nm_timeo = NFS_MAXTIMEO;
  257                 nmp->nm_retry = NFS_RETRANS_TCP;
  258         }
  259 
  260         nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
  261 
  262         /* Re-bind if rsrvd port requested and wasn't on one */
  263         adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
  264                   && (argp->flags & NFSMNT_RESVPORT);
  265         /* Also re-bind if we're switching to/from a connected UDP socket */
  266         adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
  267                     (argp->flags & NFSMNT_NOCONN));
  268 
  269         /* Update flags atomically.  Don't change the lock bits. */
  270         nmp->nm_flag = argp->flags | nmp->nm_flag;
  271         splx(s);
  272 
  273         if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
  274                 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
  275                 if (nmp->nm_timeo < NFS_MINTIMEO)
  276                         nmp->nm_timeo = NFS_MINTIMEO;
  277                 else if (nmp->nm_timeo > NFS_MAXTIMEO)
  278                         nmp->nm_timeo = NFS_MAXTIMEO;
  279         }
  280 
  281         if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
  282                 nmp->nm_retry = argp->retrans;
  283                 if (nmp->nm_retry > NFS_MAXREXMIT)
  284                         nmp->nm_retry = NFS_MAXREXMIT;
  285         }
  286 
  287         if (argp->flags & NFSMNT_NFSV3) {
  288                 if (argp->sotype == SOCK_DGRAM)
  289                         maxio = NFS_MAXDGRAMDATA;
  290                 else
  291                         maxio = NFS_MAXDATA;
  292         } else
  293                 maxio = NFS_V2MAXDATA;
  294 
  295         if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
  296                 nmp->nm_wsize = argp->wsize;
  297                 /* Round down to multiple of blocksize */
  298                 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
  299                 if (nmp->nm_wsize <= 0)
  300                         nmp->nm_wsize = NFS_FABLKSIZE;
  301         }
  302         if (nmp->nm_wsize > maxio)
  303                 nmp->nm_wsize = maxio;
  304         if (nmp->nm_wsize > MAXBSIZE)
  305                 nmp->nm_wsize = MAXBSIZE;
  306 
  307         if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
  308                 nmp->nm_rsize = argp->rsize;
  309                 /* Round down to multiple of blocksize */
  310                 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
  311                 if (nmp->nm_rsize <= 0)
  312                         nmp->nm_rsize = NFS_FABLKSIZE;
  313         }
  314         if (nmp->nm_rsize > maxio)
  315                 nmp->nm_rsize = maxio;
  316         if (nmp->nm_rsize > MAXBSIZE)
  317                 nmp->nm_rsize = MAXBSIZE;
  318 
  319         if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
  320                 nmp->nm_readdirsize = argp->readdirsize;
  321         }
  322         if (nmp->nm_readdirsize > maxio)
  323                 nmp->nm_readdirsize = maxio;
  324         if (nmp->nm_readdirsize > nmp->nm_rsize)
  325                 nmp->nm_readdirsize = nmp->nm_rsize;
  326 
  327         if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
  328                 nmp->nm_acregmin = argp->acregmin;
  329         else
  330                 nmp->nm_acregmin = NFS_MINATTRTIMO;
  331         if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
  332                 nmp->nm_acregmax = argp->acregmax;
  333         else
  334                 nmp->nm_acregmax = NFS_MAXATTRTIMO;
  335         if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
  336                 nmp->nm_acdirmin = argp->acdirmin;
  337         else
  338                 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
  339         if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
  340                 nmp->nm_acdirmax = argp->acdirmax;
  341         else
  342                 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
  343         if (nmp->nm_acdirmin > nmp->nm_acdirmax)
  344                 nmp->nm_acdirmin = nmp->nm_acdirmax;
  345         if (nmp->nm_acregmin > nmp->nm_acregmax)
  346                 nmp->nm_acregmin = nmp->nm_acregmax;
  347 
  348         if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
  349                 if (argp->maxgrouplist <= NFS_MAXGRPS)
  350                         nmp->nm_numgrps = argp->maxgrouplist;
  351                 else
  352                         nmp->nm_numgrps = NFS_MAXGRPS;
  353         }
  354         if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
  355                 if (argp->readahead <= NFS_MAXRAHEAD)
  356                         nmp->nm_readahead = argp->readahead;
  357                 else
  358                         nmp->nm_readahead = NFS_MAXRAHEAD;
  359         }
  360         if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) {
  361                 if (argp->deadthresh <= NFS_MAXDEADTHRESH)
  362                         nmp->nm_deadthresh = argp->deadthresh;
  363                 else
  364                         nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
  365         }
  366 
  367         adjsock |= ((nmp->nm_sotype != argp->sotype) ||
  368                     (nmp->nm_soproto != argp->proto));
  369         nmp->nm_sotype = argp->sotype;
  370         nmp->nm_soproto = argp->proto;
  371 
  372         if (nmp->nm_rpcclnt.rc_so && adjsock) {
  373                 nfs_safedisconnect(nmp);
  374                 if (nmp->nm_sotype == SOCK_DGRAM) {
  375                         while (nfs4_connect(nmp)) {
  376                                 printf("nfs4_decode_args: retrying connect\n");
  377                                 (void)tsleep(&lbolt, PSOCK, "nfscon", 0);
  378                         }
  379                 }
  380         }
  381 }
  382 
  383 /*
  384  * VFS Operations.
  385  *
  386  * mount system call
  387  * It seems a bit dumb to copyinstr() the host and path here and then
  388  * bcopy() them in mountnfs(), but I wanted to detect errors before
  389  * doing the sockargs() call because sockargs() allocates an mbuf and
  390  * an error after that means that I have to release the mbuf.
  391  */
  392 /* ARGSUSED */
  393 static int
  394 nfs4_cmount(struct mntarg *ma, void *data, int flags, struct thread *td)
  395 {
  396         struct nfs_args args;
  397         int error;
  398 
  399         error = copyin(data, &args, sizeof(struct nfs_args));
  400         if (error)
  401                 return (error);
  402         ma = mount_arg(ma, "nfs_args", &args, sizeof args);
  403         error = kernel_mount(ma, flags);
  404         return (error);
  405 }
  406 
  407 static int
  408 nfs4_mount(struct mount *mp, struct thread *td)
  409 {
  410         int error;
  411         struct nfs_args args;
  412         struct sockaddr *nam;
  413         struct vnode *vp;
  414         char hst[MNAMELEN];
  415         size_t len;
  416 
  417         if (mp->mnt_flag & MNT_ROOTFS) {
  418                 printf("nfs4_mountroot not supported\n");
  419                 return (EINVAL);
  420         }
  421         error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, sizeof args);
  422         if (error)
  423                 return (error);
  424 
  425         if (args.version != NFS_ARGSVERSION)
  426                 return (EPROGMISMATCH);
  427         if (mp->mnt_flag & MNT_UPDATE) {
  428                 struct nfsmount *nmp = VFSTONFS(mp);
  429 
  430                 if (nmp == NULL)
  431                         return (EIO);
  432                 /*
  433                  * When doing an update, we can't change from or to
  434                  * v3, switch lockd strategies or change cookie translation
  435                  */
  436                 args.flags = (args.flags &
  437                     ~(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)) |
  438                     (nmp->nm_flag &
  439                         (NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD));
  440                 nfs4_decode_args(nmp, &args);
  441                 return (0);
  442         }
  443 
  444         error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
  445         if (error)
  446                 return (error);
  447         bzero(&hst[len], MNAMELEN - len);
  448         /* sockargs() call must be after above copyin() calls */
  449         error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
  450         if (error)
  451                 return (error);
  452         error = mountnfs(&args, mp, nam, hst, &vp, td->td_ucred);
  453         return (error);
  454 }
  455 
  456 /*
  457  * renew should be done async
  458  * should re-scan mount queue each time
  459  */
  460 struct proc *nfs4_daemonproc;
  461 
  462 static int
  463 nfs4_do_renew(struct nfsmount *nmp, struct ucred *cred)
  464 {
  465         struct nfs4_compound cp;
  466         struct mbuf *mreq, *mrep = NULL, *md, *mb;
  467         caddr_t bpos, dpos;     
  468         int error;
  469 
  470         mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, sizeof(uint64_t));
  471         mb = mreq;
  472         bpos = mtod(mb, caddr_t);
  473 
  474         nfs_v4initcompound(&cp);
  475 
  476         nfsm_v4build_compound(&cp, "nfs4_do_renew()");
  477         nfsm_v4build_renew(&cp, nmp->nm_clientid);
  478         nfsm_v4build_finalize(&cp);
  479 
  480         nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
  481         if (error != 0)
  482                 goto nfsmout;
  483 
  484         nfsm_v4dissect_compound(&cp);
  485         nfsm_v4dissect_renew(&cp);
  486         nmp->nm_last_renewal = time_second;
  487         return (0);
  488 
  489  nfsmout:
  490         error = nfs_v4postop(&cp, error);
  491 
  492         /* XXX */
  493         if (mrep != NULL)
  494                 m_freem(mrep);
  495         return (error);
  496 }
  497 
  498 static void
  499 nfs4_daemon(void *arg)
  500 {
  501         struct mount *mp;
  502         struct nfsmount *nmp;
  503         int nmounts;
  504 
  505         while (1) {
  506                 nmounts = 0;
  507                 mtx_lock(&mountlist_mtx);
  508                 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
  509                         if (strcmp(mp->mnt_vfc->vfc_name, "nfs4") != 0)
  510                                 continue;
  511                         nmounts++;
  512                         nmp = VFSTONFS(mp);
  513                         if (time_second < nmp->nm_last_renewal + nmp->nm_lease_time - 4)
  514                                 continue;
  515                         mtx_unlock(&mountlist_mtx);
  516                         mtx_lock(&Giant);
  517                         nfs4_do_renew(nmp, (struct ucred *) arg);
  518                         mtx_unlock(&Giant);
  519                         mtx_lock(&mountlist_mtx);
  520                 }
  521                 mtx_unlock(&mountlist_mtx);
  522 
  523                 /* Must kill the daemon here, or module unload will cause a panic */
  524                 if (nmounts == 0) {
  525                         mtx_lock(&Giant);
  526                         nfs4_daemonproc = NULL;
  527                         mtx_unlock(&Giant);
  528                         /*printf("nfsv4 renewd exiting\n");*/
  529                         kthread_exit(0);
  530                 }
  531                 tsleep(&nfs4_daemonproc, PVFS, "nfs4", 2 * hz);
  532         }
  533 }
  534 
  535 /*
  536  * Common code for mount and mountroot
  537  */
  538 static int
  539 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
  540     char *hst, struct vnode **vpp, struct ucred *cred)
  541 {
  542         struct nfsmount *nmp;
  543         char *rpth, *cp1, *cp2;
  544         int nlkup = 0, error;
  545         struct nfs4_compound cp;
  546         struct mbuf *mreq, *mrep = NULL, *md, *mb;
  547         caddr_t bpos, dpos;     
  548         struct nfs4_oparg_lookup lkup;
  549         struct nfs4_oparg_getfh gfh;
  550         struct nfs4_oparg_getattr ga;
  551         struct thread *td = curthread; /* XXX */
  552 
  553         if (mp->mnt_flag & MNT_UPDATE) {
  554                 nmp = VFSTONFS(mp);
  555                 /* update paths, file handles, etc, here        XXX */
  556                 FREE(nam, M_SONAME);
  557                 return (0);
  558         } else {
  559                 nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
  560                 bzero((caddr_t)nmp, sizeof (struct nfsmount));
  561                 TAILQ_INIT(&nmp->nm_bufq);
  562                 mp->mnt_data = (qaddr_t)nmp;
  563         }
  564 
  565         vfs_getnewfsid(mp);
  566         nmp->nm_mountp = mp;
  567         mtx_init(&nmp->nm_mtx, "NFS4mount lock", NULL, MTX_DEF);                        
  568 
  569         nmp->nm_maxfilesize = 0xffffffffLL;
  570         nmp->nm_timeo = NFS_TIMEO;
  571         nmp->nm_retry = NFS_RETRANS;
  572         nmp->nm_wsize = NFS_WSIZE;
  573         nmp->nm_rsize = NFS_RSIZE;
  574         nmp->nm_readdirsize = NFS_READDIRSIZE;
  575         nmp->nm_numgrps = NFS_MAXGRPS;
  576         nmp->nm_readahead = NFS_DEFRAHEAD;
  577         nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
  578         vfs_mountedfrom(mp, hst);
  579         nmp->nm_nam = nam;
  580         /* Set up the sockets and per-host congestion */
  581         nmp->nm_sotype = argp->sotype;
  582         nmp->nm_soproto = argp->proto;
  583         nmp->nm_rpcops = &nfs4_rpcops;
  584         /* XXX */
  585         mp->mnt_stat.f_iosize = PAGE_SIZE;
  586 
  587         argp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
  588 
  589         nfs4_decode_args(nmp, argp);
  590 
  591         if ((error = nfs4_connect(nmp)))
  592                 goto bad;
  593 
  594         mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
  595         mb = mreq;
  596         bpos = mtod(mb, caddr_t);
  597 
  598         ga.bm = &nfsv4_fsinfobm;
  599         nfs_v4initcompound(&cp);
  600 
  601         /* Get remote path */
  602         rpth = hst;
  603         strsep(&rpth, ":");
  604 
  605         nfsm_v4build_compound(&cp, "mountnfs()");
  606         nfsm_v4build_putrootfh(&cp);
  607         for (cp1 = rpth; cp1 && *cp1; cp1 = cp2)  {
  608                 while (*cp1 == '/')
  609                         cp1++;
  610                 if (!*cp1)
  611                         break;
  612                 for (cp2 = cp1; *cp2 && *cp2 != '/'; cp2++)
  613                         ;
  614                 lkup.name = cp1;
  615                 lkup.namelen = cp2 - cp1;
  616                 nfsm_v4build_lookup(&cp, &lkup);
  617                 nlkup++;
  618         }
  619         nfsm_v4build_getfh(&cp, &gfh);
  620         nfsm_v4build_getattr(&cp, &ga);
  621         nfsm_v4build_finalize(&cp);
  622 
  623         nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, td, cred);
  624         if (error != 0)
  625                 goto nfsmout;
  626 
  627         nfsm_v4dissect_compound(&cp);
  628         nfsm_v4dissect_putrootfh(&cp);
  629         while (nlkup--)
  630                 nfsm_v4dissect_lookup(&cp);
  631         nfsm_v4dissect_getfh(&cp, &gfh);
  632         nfsm_v4dissect_getattr(&cp, &ga);
  633 
  634         nfs4_vfsop_fsinfo(&ga.fa, nmp);
  635         nmp->nm_state |= NFSSTA_GOTFSINFO;
  636 
  637         /* Copy root fh into nfsmount. */
  638         nmp->nm_fhsize = gfh.fh_len;
  639         bcopy(&gfh.fh_val, nmp->nm_fh, nmp->nm_fhsize);
  640         nmp->nm_last_renewal = time_second;
  641 
  642         if ((error = nfs4_do_setclientid(nmp, cred)) != 0)
  643                 goto nfsmout;
  644 
  645         /* Start renewd if it isn't already running */
  646         if (nfs4_daemonproc == NULL)
  647                 kthread_create(nfs4_daemon, crdup(cred), &nfs4_daemonproc,
  648                                (RFPROC|RFMEM), 0, "nfs4rd");
  649 
  650         return (0);
  651  nfsmout:
  652         error = nfs_v4postop(&cp, error);
  653 
  654         /* XXX */
  655         if (mrep != NULL)
  656                 m_freem(mrep);
  657 bad:
  658         mtx_destroy(&nmp->nm_mtx);
  659         nfs4_disconnect(nmp);
  660         uma_zfree(nfsmount_zone, nmp);
  661         FREE(nam, M_SONAME);
  662 
  663         return (error);
  664 }
  665 
  666 /*
  667  * unmount system call
  668  */
  669 static int
  670 nfs4_unmount(struct mount *mp, int mntflags, struct thread *td)
  671 {
  672         struct nfsmount *nmp;
  673         int error, flags = 0;
  674 
  675         if (mntflags & MNT_FORCE)
  676                 flags |= FORCECLOSE;
  677         nmp = VFSTONFS(mp);
  678         /*
  679          * Goes something like this..
  680          * - Call vflush(, td) to clear out vnodes for this filesystem
  681          * - Close the socket
  682          * - Free up the data structures
  683          */
  684         /* In the forced case, cancel any outstanding requests. */
  685         if (flags & FORCECLOSE) {
  686                 error = nfs_nmcancelreqs(nmp);
  687                 if (error)
  688                         return (error);
  689                 nfs4dev_purge();
  690         }
  691 
  692         error = vflush(mp, 0, flags, td);
  693         if (error)
  694                 return (error);
  695 
  696         /*
  697          * We are now committed to the unmount.
  698          */
  699         nfs4_disconnect(nmp);
  700         FREE(nmp->nm_nam, M_SONAME);
  701 
  702         /* XXX there's a race condition here for SMP */
  703         wakeup(&nfs4_daemonproc);
  704 
  705         mtx_destroy(&nmp->nm_mtx);
  706         uma_zfree(nfsmount_zone, nmp);
  707         return (0);
  708 }
  709 
  710 /*
  711  * Return root of a filesystem
  712  */
  713 static int
  714 nfs4_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td)
  715 {
  716         struct vnode *vp;
  717         struct nfsmount *nmp;
  718         struct nfsnode *np;
  719         int error;
  720 
  721         nmp = VFSTONFS(mp);
  722         error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np,
  723             LK_EXCLUSIVE);
  724         if (error)
  725                 return (error);
  726         vp = NFSTOV(np);
  727         if (vp->v_type == VNON)
  728             vp->v_type = VDIR;
  729         vp->v_vflag |= VV_ROOT;
  730         *vpp = vp;
  731 
  732         return (0);
  733 }
  734 
  735 /*
  736  * Flush out the buffer cache
  737  */
  738 static int
  739 nfs4_sync(struct mount *mp, int waitfor, struct thread *td)
  740 {
  741         struct vnode *vp, *mvp;
  742         int error, allerror = 0;
  743 
  744         /*
  745          * Force stale buffer cache information to be flushed.
  746          */
  747         MNT_ILOCK(mp);
  748 loop:
  749         MNT_VNODE_FOREACH(vp, mp, mvp) {
  750                 VI_LOCK(vp);
  751                 MNT_IUNLOCK(mp);
  752                 if (VOP_ISLOCKED(vp, NULL) ||
  753                     vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
  754                     waitfor == MNT_LAZY) {
  755                         VI_UNLOCK(vp);
  756                         MNT_ILOCK(mp);
  757                         continue;
  758                 }
  759                 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
  760                         MNT_ILOCK(mp);
  761                         MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
  762                         goto loop;
  763                 }
  764                 error = VOP_FSYNC(vp, waitfor, td);
  765                 if (error)
  766                         allerror = error;
  767                 VOP_UNLOCK(vp, 0, td);
  768                 vrele(vp);
  769 
  770                 MNT_ILOCK(mp);
  771         }
  772         MNT_IUNLOCK(mp);
  773         return (allerror);
  774 }
  775 
  776 static int
  777 nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
  778 {
  779         struct nfs4_oparg_setclientid scid;
  780         struct nfs4_compound cp;
  781         struct mbuf *mreq, *mrep = NULL, *md, *mb;
  782         caddr_t bpos, dpos;     
  783         struct route ro;
  784         char *ipsrc = NULL, uaddr[24], name[24];
  785         int try = 0;
  786         static unsigned long seq;
  787         int error;
  788 
  789 #ifndef NFS4_USE_RPCCLNT
  790         return (0);
  791 #endif
  792         if (nmp->nm_clientid) {
  793                 printf("nfs4_do_setclientid: already have clientid!\n");
  794                 error = 0;
  795                 goto nfsmout;
  796         }
  797 
  798         /* Try not to re-use clientids */
  799         if (seq == 0)
  800                 seq = time_second;
  801 
  802 #ifdef NFS4_USE_RPCCLNT
  803         scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp";
  804 #endif
  805         scid.cb_netid = "tcp";
  806         scid.cb_netidlen = 3;
  807         scid.cb_prog = 0x1234; /* XXX */
  808 
  809         /* Do a route lookup to find our source address for talking to this server */
  810         bzero(&ro, sizeof ro);
  811 
  812 #ifdef NFS4_USE_RPCCLNT
  813         ro.ro_dst = *nmp->nm_rpcclnt.rc_name;
  814 #endif
  815 /* XXX MRT NFS uses table 0 */
  816         in_rtalloc(&ro, 0);
  817         if (ro.ro_rt == NULL) {
  818                 error = EHOSTUNREACH;
  819                 goto nfsmout;
  820         }
  821         ipsrc = inet_ntoa(IA_SIN(ifatoia(ro.ro_rt->rt_ifa))->sin_addr);
  822         sprintf(uaddr, "%s.12.48", ipsrc);
  823         scid.cb_univaddr = uaddr;
  824         scid.cb_univaddrlen = strlen(uaddr);
  825         RTFREE(ro.ro_rt);
  826 
  827  try_again:
  828         sprintf(name, "%s-%d", ipsrc, (int) ((seq + try) % 1000000L));
  829         scid.namelen = strlen(name);
  830         scid.name = name;
  831         nfs_v4initcompound(&cp);
  832 
  833         mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
  834         mb = mreq;
  835         bpos = mtod(mb, caddr_t);
  836 
  837         nfsm_v4build_compound(&cp, "nfs4_do_setclientid()");
  838         nfsm_v4build_setclientid(&cp, &scid);
  839         nfsm_v4build_finalize(&cp);
  840 
  841         nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
  842         if (error != 0)
  843                 goto nfsmout;
  844 
  845         nfsm_v4dissect_compound(&cp);
  846         nfsm_v4dissect_setclientid(&cp, &scid);
  847         nmp->nm_clientid = scid.clientid;
  848 
  849         error = nfs_v4postop(&cp, error);
  850 
  851         /* Confirm */
  852         m_freem(mrep);
  853         mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
  854         mb = mreq;
  855         bpos = mtod(mb, caddr_t);
  856 
  857         nfs_v4initcompound(&cp);
  858 
  859         nfsm_v4build_compound(&cp, "nfs4_do_setclientid() (confirm)");
  860         nfsm_v4build_setclientid_confirm(&cp, &scid);
  861         nfsm_v4build_finalize(&cp);
  862 
  863         nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
  864         if (error != 0)
  865                 goto nfsmout;
  866 
  867         nfsm_v4dissect_compound(&cp);
  868         nfsm_v4dissect_setclientid_confirm(&cp);
  869 
  870  nfsmout:
  871         error = nfs_v4postop(&cp, error);
  872 
  873         if (mrep)
  874                 m_freem(mrep);
  875         if (error == NFSERR_CLID_INUSE && (++try < NFS4_SETCLIENTID_MAXTRIES))
  876                 goto try_again;
  877 
  878         return (error);
  879 }

Cache object: c2fc64ca5cfd8579d74b6ef8b764dbb2


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