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 /* $FreeBSD$ */
    2 /* $Id: nfs_vfsops.c,v 1.38 2003/11/05 14:59:01 rees Exp $ */
    3 
    4 /*-
    5  * copyright (c) 2003
    6  * the regents of the university of michigan
    7  * all rights reserved
    8  * 
    9  * permission is granted to use, copy, create derivative works and redistribute
   10  * this software and such derivative works for any purpose, so long as the name
   11  * of the university of michigan is not used in any advertising or publicity
   12  * pertaining to the use or distribution of this software without specific,
   13  * written prior authorization.  if the above copyright notice or any other
   14  * identification of the university of michigan is included in any copy of any
   15  * portion of this software, then the disclaimer below must also be included.
   16  * 
   17  * this software is provided as is, without representation from the university
   18  * of michigan as to its fitness for any purpose, and without warranty by the
   19  * university of michigan of any kind, either express or implied, including
   20  * without limitation the implied warranties of merchantability and fitness for
   21  * a particular purpose. the regents of the university of michigan shall not be
   22  * liable for any damages, including special, indirect, incidental, or
   23  * consequential damages, with respect to any claim arising out of or in
   24  * connection with the use of the software, even if it has been or is hereafter
   25  * advised of the possibility of such damages.
   26  */
   27 
   28 /*-
   29  * Copyright (c) 1989, 1993, 1995
   30  *      The Regents of the University of California.  All rights reserved.
   31  *
   32  * This code is derived from software contributed to Berkeley by
   33  * Rick Macklem at The University of Guelph.
   34  *
   35  * Redistribution and use in source and binary forms, with or without
   36  * modification, are permitted provided that the following conditions
   37  * are met:
   38  * 1. Redistributions of source code must retain the above copyright
   39  *    notice, this list of conditions and the following disclaimer.
   40  * 2. Redistributions in binary form must reproduce the above copyright
   41  *    notice, this list of conditions and the following disclaimer in the
   42  *    documentation and/or other materials provided with the distribution.
   43  * 4. Neither the name of the University nor the names of its contributors
   44  *    may be used to endorse or promote products derived from this software
   45  *    without specific prior written permission.
   46  *
   47  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   57  * SUCH DAMAGE.
   58  *
   59  *      @(#)nfs_vfsops.c        8.12 (Berkeley) 5/20/95
   60  */
   61 
   62 #include <sys/cdefs.h>
   63 __FBSDID("$FreeBSD$");
   64 
   65 #include "opt_bootp.h"
   66 #include "opt_nfsroot.h"
   67 
   68 #include <sys/param.h>
   69 #include <sys/systm.h>
   70 #include <sys/kernel.h>
   71 #include <sys/kthread.h>
   72 #include <sys/limits.h>
   73 #include <sys/lock.h>
   74 #include <sys/malloc.h>
   75 #include <sys/mbuf.h>
   76 #include <sys/module.h>
   77 #include <sys/mount.h>
   78 #include <sys/proc.h>
   79 #include <sys/socket.h>
   80 #include <sys/socketvar.h>
   81 #include <sys/sockio.h>
   82 #include <sys/sysctl.h>
   83 #include <sys/unistd.h>
   84 #include <sys/vnode.h>
   85 #include <sys/signalvar.h>
   86 
   87 #include <vm/vm.h>
   88 #include <vm/vm_extern.h>
   89 #include <vm/uma.h>
   90 
   91 #include <net/if.h>
   92 #include <net/route.h>
   93 #include <netinet/in.h>
   94 #include <netinet/in_var.h>
   95 
   96 #include <rpc/rpcclnt.h>
   97 
   98 #include <nfs/rpcv2.h>
   99 #include <nfs/nfsproto.h>
  100 #include <nfsclient/nfs.h>
  101 #include <nfs4client/nfs4.h>
  102 #include <nfsclient/nfsnode.h>
  103 #include <nfsclient/nfsmount.h>
  104 #include <nfs/xdr_subs.h>
  105 #include <nfsclient/nfsm_subs.h>
  106 #include <nfsclient/nfsdiskless.h>
  107 
  108 #include <nfs4client/nfs4m_subs.h>
  109 #include <nfs4client/nfs4_vfs.h>
  110 
  111 #include <nfs4client/nfs4_dev.h>
  112 #include <nfs4client/nfs4_idmap.h>
  113 
  114 SYSCTL_NODE(_vfs, OID_AUTO, nfs4, CTLFLAG_RW, 0, "NFS4 filesystem");
  115 SYSCTL_STRUCT(_vfs_nfs4, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
  116         &nfsstats, nfsstats, "S,nfsstats");
  117 
  118 static void     nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp);
  119 static void     nfs4_daemon(void *arg);
  120 static int      mountnfs(struct nfs_args *, struct mount *,
  121                     struct sockaddr *, char *, struct vnode **,
  122                     struct ucred *cred);
  123 static int      nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred);
  124 static vfs_mount_t nfs_mount;
  125 static vfs_cmount_t nfs_cmount;
  126 static vfs_unmount_t nfs_unmount;
  127 static vfs_root_t nfs_root;
  128 static vfs_statfs_t nfs_statfs;
  129 static vfs_sync_t nfs_sync;
  130 
  131 /*
  132  * nfs vfs operations.
  133  */
  134 static struct vfsops nfs_vfsops = {
  135         .vfs_init =             nfs4_init,
  136         .vfs_mount =            nfs_mount,
  137         .vfs_cmount =           nfs_cmount,
  138         .vfs_root =             nfs_root,
  139         .vfs_statfs =           nfs_statfs,
  140         .vfs_sync =             nfs_sync,
  141         .vfs_uninit =           nfs4_uninit,
  142         .vfs_unmount =          nfs_unmount,
  143 };
  144 VFS_SET(nfs_vfsops, nfs4, VFCF_NETWORK);
  145 
  146 static struct nfs_rpcops nfs4_rpcops = {
  147         nfs4_readrpc,
  148         nfs4_writerpc,
  149         nfs4_writebp,
  150         nfs4_readlinkrpc,
  151         nfs4_invaldir,
  152         nfs4_commit,
  153 };
  154 
  155 /* So that loader and kldload(2) can find us, wherever we are.. */
  156 MODULE_VERSION(nfs4, 1);
  157 
  158 void            nfsargs_ntoh(struct nfs_args *);
  159 
  160 int
  161 nfs4_init(struct vfsconf *vfsp)
  162 {
  163 
  164         rpcclnt_init();
  165         nfs4dev_init();
  166         idmap_init();
  167         nfsm_v4init();
  168 
  169         return (0);
  170 }
  171 
  172 int
  173 nfs4_uninit(struct vfsconf *vfsp)
  174 {
  175 
  176         rpcclnt_uninit();
  177         nfs4dev_uninit();
  178         idmap_uninit();
  179 
  180         return (0);
  181 }
  182 
  183 /*
  184  * nfs statfs call
  185  */
  186 static int
  187 nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
  188 {
  189         struct vnode *vp;
  190         struct nfs_statfs *sfp;
  191         caddr_t bpos, dpos;
  192         struct nfsmount *nmp = VFSTONFS(mp);
  193         int error = 0;
  194         struct mbuf *mreq, *mrep = NULL, *md, *mb;
  195         struct nfsnode *np;
  196         struct nfs4_compound cp;
  197         struct nfs4_oparg_getattr ga;
  198         struct nfsv4_fattr *fap = &ga.fa;
  199 
  200 #ifndef nolint
  201         sfp = NULL;
  202 #endif
  203         error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE);
  204         if (error)
  205                 return (error);
  206         vp = NFSTOV(np);
  207         nfsstats.rpccnt[NFSPROC_FSSTAT]++;
  208         mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1));
  209         mb = mreq;
  210         bpos = mtod(mb, caddr_t);
  211 
  212         ga.bm = &nfsv4_fsattrbm;
  213         nfs_v4initcompound(&cp);
  214 
  215         nfsm_v4build_compound(&cp, "statfs()");
  216         nfsm_v4build_putfh(&cp, vp);
  217         nfsm_v4build_getattr(&cp, &ga);
  218         nfsm_v4build_finalize(&cp);
  219 
  220         nfsm_request(vp, NFSV4PROC_COMPOUND, td, td->td_ucred);
  221         if (error != 0)
  222                 goto nfsmout;
  223 
  224         nfsm_v4dissect_compound(&cp);
  225         nfsm_v4dissect_putfh(&cp);
  226         nfsm_v4dissect_getattr(&cp, &ga);
  227 
  228         nfs4_vfsop_statfs(fap, sbp, mp);
  229 
  230 nfsmout:
  231         error = nfs_v4postop(&cp, error);
  232 
  233         vput(vp);
  234         if (mrep != NULL)
  235                 m_freem(mrep);
  236 
  237         return (error);
  238 }
  239 
  240 static void
  241 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
  242 {
  243         int s;
  244         int adjsock;
  245         int maxio;
  246 
  247         s = splnet();
  248 
  249         /*
  250          * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
  251          * no sense in that context.  Also, set appropriate retransmit
  252          * and soft timeout behavior.
  253          */
  254         if (argp->sotype == SOCK_STREAM) {
  255                 nmp->nm_flag &= ~NFSMNT_NOCONN;
  256                 nmp->nm_flag |= NFSMNT_DUMBTIMR;
  257                 nmp->nm_timeo = NFS_MAXTIMEO;
  258                 nmp->nm_retry = NFS_RETRANS_TCP;
  259         }
  260 
  261         nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
  262 
  263         /* Re-bind if rsrvd port requested and wasn't on one */
  264         adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
  265                   && (argp->flags & NFSMNT_RESVPORT);
  266         /* Also re-bind if we're switching to/from a connected UDP socket */
  267         adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
  268                     (argp->flags & NFSMNT_NOCONN));
  269 
  270         /* Update flags atomically.  Don't change the lock bits. */
  271         nmp->nm_flag = argp->flags | nmp->nm_flag;
  272         splx(s);
  273 
  274         if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
  275                 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
  276                 if (nmp->nm_timeo < NFS_MINTIMEO)
  277                         nmp->nm_timeo = NFS_MINTIMEO;
  278                 else if (nmp->nm_timeo > NFS_MAXTIMEO)
  279                         nmp->nm_timeo = NFS_MAXTIMEO;
  280         }
  281 
  282         if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
  283                 nmp->nm_retry = argp->retrans;
  284                 if (nmp->nm_retry > NFS_MAXREXMIT)
  285                         nmp->nm_retry = NFS_MAXREXMIT;
  286         }
  287 
  288         if (argp->flags & NFSMNT_NFSV3) {
  289                 if (argp->sotype == SOCK_DGRAM)
  290                         maxio = NFS_MAXDGRAMDATA;
  291                 else
  292                         maxio = NFS_MAXDATA;
  293         } else
  294                 maxio = NFS_V2MAXDATA;
  295 
  296         if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
  297                 nmp->nm_wsize = argp->wsize;
  298                 /* Round down to multiple of blocksize */
  299                 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
  300                 if (nmp->nm_wsize <= 0)
  301                         nmp->nm_wsize = NFS_FABLKSIZE;
  302         }
  303         if (nmp->nm_wsize > maxio)
  304                 nmp->nm_wsize = maxio;
  305         if (nmp->nm_wsize > MAXBSIZE)
  306                 nmp->nm_wsize = MAXBSIZE;
  307 
  308         if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
  309                 nmp->nm_rsize = argp->rsize;
  310                 /* Round down to multiple of blocksize */
  311                 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
  312                 if (nmp->nm_rsize <= 0)
  313                         nmp->nm_rsize = NFS_FABLKSIZE;
  314         }
  315         if (nmp->nm_rsize > maxio)
  316                 nmp->nm_rsize = maxio;
  317         if (nmp->nm_rsize > MAXBSIZE)
  318                 nmp->nm_rsize = MAXBSIZE;
  319 
  320         if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
  321                 nmp->nm_readdirsize = argp->readdirsize;
  322         }
  323         if (nmp->nm_readdirsize > maxio)
  324                 nmp->nm_readdirsize = maxio;
  325         if (nmp->nm_readdirsize > nmp->nm_rsize)
  326                 nmp->nm_readdirsize = nmp->nm_rsize;
  327 
  328         if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
  329                 nmp->nm_acregmin = argp->acregmin;
  330         else
  331                 nmp->nm_acregmin = NFS_MINATTRTIMO;
  332         if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
  333                 nmp->nm_acregmax = argp->acregmax;
  334         else
  335                 nmp->nm_acregmax = NFS_MAXATTRTIMO;
  336         if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
  337                 nmp->nm_acdirmin = argp->acdirmin;
  338         else
  339                 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
  340         if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
  341                 nmp->nm_acdirmax = argp->acdirmax;
  342         else
  343                 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
  344         if (nmp->nm_acdirmin > nmp->nm_acdirmax)
  345                 nmp->nm_acdirmin = nmp->nm_acdirmax;
  346         if (nmp->nm_acregmin > nmp->nm_acregmax)
  347                 nmp->nm_acregmin = nmp->nm_acregmax;
  348 
  349         if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
  350                 if (argp->maxgrouplist <= NFS_MAXGRPS)
  351                         nmp->nm_numgrps = argp->maxgrouplist;
  352                 else
  353                         nmp->nm_numgrps = NFS_MAXGRPS;
  354         }
  355         if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
  356                 if (argp->readahead <= NFS_MAXRAHEAD)
  357                         nmp->nm_readahead = argp->readahead;
  358                 else
  359                         nmp->nm_readahead = NFS_MAXRAHEAD;
  360         }
  361         if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) {
  362                 if (argp->deadthresh <= NFS_MAXDEADTHRESH)
  363                         nmp->nm_deadthresh = argp->deadthresh;
  364                 else
  365                         nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
  366         }
  367 
  368         adjsock |= ((nmp->nm_sotype != argp->sotype) ||
  369                     (nmp->nm_soproto != argp->proto));
  370         nmp->nm_sotype = argp->sotype;
  371         nmp->nm_soproto = argp->proto;
  372 
  373         if (nmp->nm_rpcclnt.rc_so && adjsock) {
  374                 nfs_safedisconnect(nmp);
  375                 if (nmp->nm_sotype == SOCK_DGRAM) {
  376                         while (nfs4_connect(nmp)) {
  377                                 printf("nfs_args: retrying connect\n");
  378                                 (void) tsleep((caddr_t)&lbolt,
  379                                               PSOCK, "nfscon", 0);
  380                         }
  381                 }
  382         }
  383 }
  384 
  385 /*
  386  * VFS Operations.
  387  *
  388  * mount system call
  389  * It seems a bit dumb to copyinstr() the host and path here and then
  390  * bcopy() them in mountnfs(), but I wanted to detect errors before
  391  * doing the sockargs() call because sockargs() allocates an mbuf and
  392  * an error after that means that I have to release the mbuf.
  393  */
  394 /* ARGSUSED */
  395 static int
  396 nfs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td)
  397 {
  398         struct nfs_args args;
  399         int error;
  400 
  401         error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
  402         if (error)
  403                 return (error);
  404 
  405         ma = mount_arg(ma, "nfs_args", &args, sizeof args);
  406 
  407         error = kernel_mount(ma, flags);
  408 
  409          return (error);
  410 }
  411 
  412 static int
  413 nfs_mount(struct mount *mp, struct thread *td)
  414 {
  415         int error;
  416         struct nfs_args args;
  417         struct sockaddr *nam;
  418         struct vnode *vp;
  419         char hst[MNAMELEN];
  420         size_t len;
  421 
  422         if (mp->mnt_flag & MNT_ROOTFS) {
  423                 printf("NFSv4: nfs_mountroot not supported\n");
  424                 return EINVAL;
  425         }
  426         error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, sizeof args);
  427         if (error)
  428                 return (error);
  429 
  430         if (args.version != NFS_ARGSVERSION)
  431                 return (EPROGMISMATCH);
  432         if (mp->mnt_flag & MNT_UPDATE) {
  433                 struct nfsmount *nmp = VFSTONFS(mp);
  434 
  435                 if (nmp == NULL)
  436                         return (EIO);
  437                 /*
  438                  * When doing an update, we can't change from or to
  439                  * v3, switch lockd strategies or change cookie translation
  440                  */
  441                 args.flags = (args.flags &
  442                     ~(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)) |
  443                     (nmp->nm_flag &
  444                         (NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD));
  445                 nfs_decode_args(nmp, &args);
  446                 return (0);
  447         }
  448 
  449         error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
  450         if (error)
  451                 return (error);
  452         bzero(&hst[len], MNAMELEN - len);
  453         /* sockargs() call must be after above copyin() calls */
  454         error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
  455         if (error)
  456                 return (error);
  457         error = mountnfs(&args, mp, nam, hst, &vp, td->td_ucred);
  458         return (error);
  459 }
  460 
  461 /*
  462  * renew should be done async
  463  * should re-scan mount queue each time
  464  */
  465 struct proc *nfs4_daemonproc;
  466 
  467 static int
  468 nfs4_do_renew(struct nfsmount *nmp, struct ucred *cred)
  469 {
  470         struct nfs4_compound cp;
  471         struct mbuf *mreq, *mrep = NULL, *md, *mb;
  472         caddr_t bpos, dpos;     
  473         int error;
  474 
  475         mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, sizeof(uint64_t));
  476         mb = mreq;
  477         bpos = mtod(mb, caddr_t);
  478 
  479         nfs_v4initcompound(&cp);
  480 
  481         nfsm_v4build_compound(&cp, "nfs4_do_renew()");
  482         nfsm_v4build_renew(&cp, nmp->nm_clientid);
  483         nfsm_v4build_finalize(&cp);
  484 
  485         nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
  486         if (error != 0)
  487                 goto nfsmout;
  488 
  489         nfsm_v4dissect_compound(&cp);
  490         nfsm_v4dissect_renew(&cp);
  491         nmp->nm_last_renewal = time_second;
  492         return (0);
  493 
  494  nfsmout:
  495         error = nfs_v4postop(&cp, error);
  496 
  497         /* XXX */
  498         if (mrep != NULL)
  499                 m_freem(mrep);
  500         return (error);
  501 }
  502 
  503 static void
  504 nfs4_daemon(void *arg)
  505 {
  506         struct mount *mp;
  507         struct nfsmount *nmp;
  508         int nmounts;
  509 
  510         while (1) {
  511                 nmounts = 0;
  512                 mtx_lock(&mountlist_mtx);
  513                 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
  514                         if (strcmp(mp->mnt_vfc->vfc_name, "nfs4") != 0)
  515                                 continue;
  516                         nmounts++;
  517                         nmp = VFSTONFS(mp);
  518                         if (time_second < nmp->nm_last_renewal + nmp->nm_lease_time - 4)
  519                                 continue;
  520                         mtx_unlock(&mountlist_mtx);
  521                         mtx_lock(&Giant);
  522                         nfs4_do_renew(nmp, (struct ucred *) arg);
  523                         mtx_unlock(&Giant);
  524                         mtx_lock(&mountlist_mtx);
  525                 }
  526                 mtx_unlock(&mountlist_mtx);
  527 
  528                 /* Must kill the daemon here, or module unload will cause a panic */
  529                 if (nmounts == 0) {
  530                         mtx_lock(&Giant);
  531                         nfs4_daemonproc = NULL;
  532                         mtx_unlock(&Giant);
  533                         /*printf("nfsv4 renewd exiting\n");*/
  534                         kthread_exit(0);
  535                 }
  536                 tsleep(&nfs4_daemonproc, PVFS, "nfs4", 2 * hz);
  537         }
  538 }
  539 
  540 /*
  541  * Common code for mount and mountroot
  542  */
  543 static int
  544 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
  545     char *hst, struct vnode **vpp, struct ucred *cred)
  546 {
  547         struct nfsmount *nmp;
  548         char *rpth, *cp1, *cp2;
  549         int nlkup = 0, error;
  550         struct nfs4_compound cp;
  551         struct mbuf *mreq, *mrep = NULL, *md, *mb;
  552         caddr_t bpos, dpos;     
  553         struct nfs4_oparg_lookup lkup;
  554         struct nfs4_oparg_getfh gfh;
  555         struct nfs4_oparg_getattr ga;
  556         struct thread *td = curthread; /* XXX */
  557 
  558         if (mp->mnt_flag & MNT_UPDATE) {
  559                 nmp = VFSTONFS(mp);
  560                 /* update paths, file handles, etc, here        XXX */
  561                 FREE(nam, M_SONAME);
  562                 return (0);
  563         } else {
  564                 nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
  565                 bzero((caddr_t)nmp, sizeof (struct nfsmount));
  566                 TAILQ_INIT(&nmp->nm_bufq);
  567                 mp->mnt_data = (qaddr_t)nmp;
  568         }
  569 
  570         vfs_getnewfsid(mp);
  571         nmp->nm_mountp = mp;
  572         nmp->nm_maxfilesize = 0xffffffffLL;
  573         nmp->nm_timeo = NFS_TIMEO;
  574         nmp->nm_retry = NFS_RETRANS;
  575         nmp->nm_wsize = NFS_WSIZE;
  576         nmp->nm_rsize = NFS_RSIZE;
  577         nmp->nm_readdirsize = NFS_READDIRSIZE;
  578         nmp->nm_numgrps = NFS_MAXGRPS;
  579         nmp->nm_readahead = NFS_DEFRAHEAD;
  580         nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
  581         vfs_mountedfrom(mp, hst);
  582         nmp->nm_nam = nam;
  583         /* Set up the sockets and per-host congestion */
  584         nmp->nm_sotype = argp->sotype;
  585         nmp->nm_soproto = argp->proto;
  586         nmp->nm_rpcops = &nfs4_rpcops;
  587         /* XXX */
  588         mp->mnt_stat.f_iosize = PAGE_SIZE;
  589 
  590         argp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
  591 
  592         nfs_decode_args(nmp, argp);
  593 
  594         if ((error = nfs4_connect(nmp)))
  595                 goto bad;
  596 
  597         mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
  598         mb = mreq;
  599         bpos = mtod(mb, caddr_t);
  600 
  601         ga.bm = &nfsv4_fsinfobm;
  602         nfs_v4initcompound(&cp);
  603 
  604         /* Get remote path */
  605         rpth = hst;
  606         strsep(&rpth, ":");
  607 
  608         nfsm_v4build_compound(&cp, "mountnfs()");
  609         nfsm_v4build_putrootfh(&cp);
  610         for (cp1 = rpth; cp1 && *cp1; cp1 = cp2)  {
  611                 while (*cp1 == '/')
  612                         cp1++;
  613                 if (!*cp1)
  614                         break;
  615                 for (cp2 = cp1; *cp2 && *cp2 != '/'; cp2++)
  616                         ;
  617                 lkup.name = cp1;
  618                 lkup.namelen = cp2 - cp1;
  619                 nfsm_v4build_lookup(&cp, &lkup);
  620                 nlkup++;
  621         }
  622         nfsm_v4build_getfh(&cp, &gfh);
  623         nfsm_v4build_getattr(&cp, &ga);
  624         nfsm_v4build_finalize(&cp);
  625 
  626         nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, td, cred);
  627         if (error != 0)
  628                 goto nfsmout;
  629 
  630         nfsm_v4dissect_compound(&cp);
  631         nfsm_v4dissect_putrootfh(&cp);
  632         while (nlkup--)
  633                 nfsm_v4dissect_lookup(&cp);
  634         nfsm_v4dissect_getfh(&cp, &gfh);
  635         nfsm_v4dissect_getattr(&cp, &ga);
  636 
  637         nfs4_vfsop_fsinfo(&ga.fa, nmp);
  638         nmp->nm_state |= NFSSTA_GOTFSINFO;
  639 
  640         /* Copy root fh into nfsmount. */
  641         nmp->nm_fhsize = gfh.fh_len;
  642         bcopy(&gfh.fh_val, nmp->nm_fh, nmp->nm_fhsize);
  643         nmp->nm_last_renewal = time_second;
  644 
  645         if ((error = nfs4_do_setclientid(nmp, cred)) != 0)
  646                 goto nfsmout;
  647 
  648         /* Start renewd if it isn't already running */
  649         if (nfs4_daemonproc == NULL)
  650                 kthread_create(nfs4_daemon, crdup(cred), &nfs4_daemonproc,
  651                                (RFPROC|RFMEM), 0, "nfs4rd");
  652 
  653         return (0);
  654  nfsmout:
  655         error = nfs_v4postop(&cp, error);
  656 
  657         /* XXX */
  658         if (mrep != NULL)
  659                 m_freem(mrep);
  660 bad:
  661         nfs4_disconnect(nmp);
  662         uma_zfree(nfsmount_zone, nmp);
  663         FREE(nam, M_SONAME);
  664 
  665         return (error);
  666 }
  667 
  668 /*
  669  * unmount system call
  670  */
  671 static int
  672 nfs_unmount(struct mount *mp, int mntflags, struct thread *td)
  673 {
  674         struct nfsmount *nmp;
  675         int error, flags = 0;
  676 
  677         if (mntflags & MNT_FORCE)
  678                 flags |= FORCECLOSE;
  679         nmp = VFSTONFS(mp);
  680         /*
  681          * Goes something like this..
  682          * - Call vflush(, td) to clear out vnodes for this filesystem
  683          * - Close the socket
  684          * - Free up the data structures
  685          */
  686         /* In the forced case, cancel any outstanding requests. */
  687         if (flags & FORCECLOSE) {
  688                 error = nfs_nmcancelreqs(nmp);
  689                 if (error)
  690                         return (error);
  691                 nfs4dev_purge();
  692         }
  693 
  694         error = vflush(mp, 0, flags, td);
  695         if (error)
  696                 return (error);
  697 
  698         /*
  699          * We are now committed to the unmount.
  700          */
  701         nfs4_disconnect(nmp);
  702         FREE(nmp->nm_nam, M_SONAME);
  703 
  704         /* XXX there's a race condition here for SMP */
  705         wakeup(&nfs4_daemonproc);
  706 
  707         uma_zfree(nfsmount_zone, nmp);
  708         return (0);
  709 }
  710 
  711 /*
  712  * Return root of a filesystem
  713  */
  714 static int
  715 nfs_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td)
  716 {
  717         struct vnode *vp;
  718         struct nfsmount *nmp;
  719         struct nfsnode *np;
  720         int error;
  721 
  722         nmp = VFSTONFS(mp);
  723         error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, 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 /* ARGSUSED */
  739 static int
  740 nfs_sync(struct mount *mp, int waitfor, struct thread *td)
  741 {
  742         struct vnode *vp, *mvp;
  743         int error, allerror = 0;
  744 
  745         /*
  746          * Force stale buffer cache information to be flushed.
  747          */
  748         MNT_ILOCK(mp);
  749 loop:
  750         MNT_VNODE_FOREACH(vp, mp, mvp) {
  751                 VI_LOCK(vp);
  752                 MNT_IUNLOCK(mp);
  753                 if (VOP_ISLOCKED(vp, NULL) ||
  754                     vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
  755                     waitfor == MNT_LAZY) {
  756                         VI_UNLOCK(vp);
  757                         MNT_ILOCK(mp);
  758                         continue;
  759                 }
  760                 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
  761                         MNT_ILOCK(mp);
  762                         MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
  763                         goto loop;
  764                 }
  765                 error = VOP_FSYNC(vp, waitfor, td);
  766                 if (error)
  767                         allerror = error;
  768                 VOP_UNLOCK(vp, 0, td);
  769                 vrele(vp);
  770 
  771                 MNT_ILOCK(mp);
  772         }
  773         MNT_IUNLOCK(mp);
  774         return (allerror);
  775 }
  776 
  777 static int
  778 nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
  779 {
  780         struct nfs4_oparg_setclientid scid;
  781         struct nfs4_compound cp;
  782         struct mbuf *mreq, *mrep = NULL, *md, *mb;
  783         caddr_t bpos, dpos;     
  784         struct route ro;
  785         char *ipsrc = NULL, uaddr[24], name[24];
  786         int try = 0;
  787         static unsigned long seq;
  788         int error;
  789 
  790 #ifndef NFS4_USE_RPCCLNT
  791         return (0);
  792 #endif
  793         if (nmp->nm_clientid) {
  794                 printf("nfs4_do_setclientid: already have clientid!\n");
  795                 error = 0;
  796                 goto nfsmout;
  797         }
  798 
  799         /* Try not to re-use clientids */
  800         if (seq == 0)
  801                 seq = time_second;
  802 
  803 #ifdef NFS4_USE_RPCCLNT
  804         scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp";
  805 #endif
  806         scid.cb_netid = "tcp";
  807         scid.cb_netidlen = 3;
  808         scid.cb_prog = 0x1234; /* XXX */
  809 
  810         /* Do a route lookup to find our source address for talking to this server */
  811         bzero(&ro, sizeof ro);
  812 
  813 #ifdef NFS4_USE_RPCCLNT
  814         ro.ro_dst = *nmp->nm_rpcclnt.rc_name;
  815 #endif
  816         rtalloc(&ro);
  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: 8e65ea9e85c0c7cbc0b749d256a0d622


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