nfs_fha_new.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
    5  * Copyright (c) 2013 Spectra Logic Corporation
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <fs/nfs/nfsport.h>
   33 
   34 #include <rpc/rpc.h>
   35 #include <nfs/nfs_fha.h>
   36 #include <fs/nfs/xdr_subs.h>
   37 #include <fs/nfs/nfs.h>
   38 #include <fs/nfs/nfsproto.h>
   39 #include <fs/nfs/nfsm_subs.h>
   40 #include <fs/nfsserver/nfs_fha_new.h>
   41 
   42 static void fhanew_init(void *foo);
   43 static void fhanew_uninit(void *foo);
   44 rpcproc_t fhanew_get_procnum(rpcproc_t procnum);
   45 int fhanew_realign(struct mbuf **mb, int malloc_flags);
   46 int fhanew_get_fh(uint64_t *fh, int v3, struct mbuf **md, caddr_t *dpos);
   47 int fhanew_is_read(rpcproc_t procnum);
   48 int fhanew_is_write(rpcproc_t procnum);
   49 int fhanew_get_offset(struct mbuf **md, caddr_t *dpos, int v3,
   50                       struct fha_info *info);
   51 int fhanew_no_offset(rpcproc_t procnum);
   52 void fhanew_set_locktype(rpcproc_t procnum, struct fha_info *info);
   53 static int fhenew_stats_sysctl(SYSCTL_HANDLER_ARGS);
   54 
   55 static struct fha_params fhanew_softc;
   56 
   57 SYSCTL_DECL(_vfs_nfsd);
   58 
   59 extern int newnfs_nfsv3_procid[];
   60 extern SVCPOOL  *nfsrvd_pool;
   61 
   62 SYSINIT(nfs_fhanew, SI_SUB_ROOT_CONF, SI_ORDER_ANY, fhanew_init, NULL);
   63 SYSUNINIT(nfs_fhanew, SI_SUB_ROOT_CONF, SI_ORDER_ANY, fhanew_uninit, NULL);
   64 
   65 static void
   66 fhanew_init(void *foo)
   67 {
   68         struct fha_params *softc;
   69 
   70         softc = &fhanew_softc;
   71 
   72         bzero(softc, sizeof(*softc));
   73 
   74         /*
   75          * Setup the callbacks for this FHA personality.
   76          */
   77         softc->callbacks.get_procnum = fhanew_get_procnum;
   78         softc->callbacks.realign = fhanew_realign;
   79         softc->callbacks.get_fh = fhanew_get_fh;
   80         softc->callbacks.is_read = fhanew_is_read;
   81         softc->callbacks.is_write = fhanew_is_write;
   82         softc->callbacks.get_offset = fhanew_get_offset;
   83         softc->callbacks.no_offset = fhanew_no_offset;
   84         softc->callbacks.set_locktype = fhanew_set_locktype;
   85         softc->callbacks.fhe_stats_sysctl = fhenew_stats_sysctl;
   86 
   87         snprintf(softc->server_name, sizeof(softc->server_name),
   88             FHANEW_SERVER_NAME);
   89 
   90         softc->pool = &nfsrvd_pool;
   91 
   92         /*
   93          * Initialize the sysctl context list for the fha module.
   94          */
   95         sysctl_ctx_init(&softc->sysctl_ctx);
   96         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
   97             SYSCTL_STATIC_CHILDREN(_vfs_nfsd), OID_AUTO, "fha", CTLFLAG_RD,
   98             0, "NFS File Handle Affinity (FHA)");
   99         if (softc->sysctl_tree == NULL) {
  100                 printf("%s: unable to allocate sysctl tree\n", __func__);
  101                 return;
  102         }
  103 
  104         fha_init(softc);
  105 }
  106 
  107 static void
  108 fhanew_uninit(void *foo)
  109 {
  110         struct fha_params *softc;
  111 
  112         softc = &fhanew_softc;
  113 
  114         fha_uninit(softc);
  115 }
  116 
  117 rpcproc_t
  118 fhanew_get_procnum(rpcproc_t procnum)
  119 {
  120         if (procnum > NFSV2PROC_STATFS)
  121                 return (-1);
  122 
  123         return (newnfs_nfsv3_procid[procnum]);
  124 }
  125 
  126 int
  127 fhanew_realign(struct mbuf **mb, int malloc_flags)
  128 {
  129         return (newnfs_realign(mb, malloc_flags));
  130 }
  131 
  132 int
  133 fhanew_get_fh(uint64_t *fh, int v3, struct mbuf **md, caddr_t *dpos)
  134 {
  135         struct nfsrv_descript lnd, *nd;
  136         uint32_t *tl;
  137         uint8_t *buf;
  138         uint64_t t;
  139         int error, len, i;
  140 
  141         error = 0;
  142         len = 0;
  143         nd = &lnd;
  144 
  145         nd->nd_md = *md;
  146         nd->nd_dpos = *dpos;
  147 
  148         if (v3) {
  149                 NFSM_DISSECT_NONBLOCK(tl, uint32_t *, NFSX_UNSIGNED);
  150                 if ((len = fxdr_unsigned(int, *tl)) <= 0 || len > NFSX_FHMAX) {
  151                         error = EBADRPC;
  152                         goto nfsmout;
  153                 }
  154         } else {
  155                 len = NFSX_V2FH;
  156         }
  157 
  158         t = 0;
  159         if (len != 0) {
  160                 NFSM_DISSECT_NONBLOCK(buf, uint8_t *, len);
  161                 for (i = 0; i < len; i++)
  162                         t ^= ((uint64_t)buf[i] << (i & 7) * 8);
  163         }
  164         *fh = t;
  165 
  166 nfsmout:
  167         *md = nd->nd_md;
  168         *dpos = nd->nd_dpos;
  169 
  170         return (error);
  171 }
  172 
  173 int
  174 fhanew_is_read(rpcproc_t procnum)
  175 {
  176         if (procnum == NFSPROC_READ)
  177                 return (1);
  178         else
  179                 return (0);
  180 }
  181 
  182 int
  183 fhanew_is_write(rpcproc_t procnum)
  184 {
  185         if (procnum == NFSPROC_WRITE)
  186                 return (1);
  187         else
  188                 return (0);
  189 }
  190 
  191 int
  192 fhanew_get_offset(struct mbuf **md, caddr_t *dpos, int v3,
  193                   struct fha_info *info)
  194 {
  195         struct nfsrv_descript lnd, *nd;
  196         uint32_t *tl;
  197         int error;
  198 
  199         error = 0;
  200 
  201         nd = &lnd;
  202         nd->nd_md = *md;
  203         nd->nd_dpos = *dpos;
  204 
  205         if (v3) {
  206                 NFSM_DISSECT_NONBLOCK(tl, uint32_t *, 2 * NFSX_UNSIGNED);
  207                 info->offset = fxdr_hyper(tl);
  208         } else {
  209                 NFSM_DISSECT_NONBLOCK(tl, uint32_t *, NFSX_UNSIGNED);
  210                 info->offset = fxdr_unsigned(uint32_t, *tl);
  211         }
  212 
  213 nfsmout:
  214         *md = nd->nd_md;
  215         *dpos = nd->nd_dpos;
  216 
  217         return (error);
  218 }
  219 
  220 int
  221 fhanew_no_offset(rpcproc_t procnum)
  222 {
  223         if (procnum == NFSPROC_FSSTAT ||
  224             procnum == NFSPROC_FSINFO ||
  225             procnum == NFSPROC_PATHCONF ||
  226             procnum == NFSPROC_NOOP ||
  227             procnum == NFSPROC_NULL)
  228                 return (1);
  229         else
  230                 return (0);
  231 }
  232 
  233 void
  234 fhanew_set_locktype(rpcproc_t procnum, struct fha_info *info)
  235 {
  236         switch (procnum) {
  237         case NFSPROC_NULL:
  238         case NFSPROC_GETATTR:
  239         case NFSPROC_LOOKUP:
  240         case NFSPROC_ACCESS:
  241         case NFSPROC_READLINK:
  242         case NFSPROC_READ:
  243         case NFSPROC_READDIR:
  244         case NFSPROC_READDIRPLUS:
  245         case NFSPROC_WRITE:
  246                 info->locktype = LK_SHARED;
  247                 break;
  248         case NFSPROC_SETATTR:
  249         case NFSPROC_CREATE:
  250         case NFSPROC_MKDIR:
  251         case NFSPROC_SYMLINK:
  252         case NFSPROC_MKNOD:
  253         case NFSPROC_REMOVE:
  254         case NFSPROC_RMDIR:
  255         case NFSPROC_RENAME:
  256         case NFSPROC_LINK:
  257         case NFSPROC_FSSTAT:
  258         case NFSPROC_FSINFO:
  259         case NFSPROC_PATHCONF:
  260         case NFSPROC_COMMIT:
  261         case NFSPROC_NOOP:
  262                 info->locktype = LK_EXCLUSIVE;
  263                 break;
  264         }
  265 }
  266 
  267 static int
  268 fhenew_stats_sysctl(SYSCTL_HANDLER_ARGS)
  269 {
  270         return (fhe_stats_sysctl(oidp, arg1, arg2, req, &fhanew_softc));
  271 }
  272 
  273 
  274 SVCTHREAD *
  275 fhanew_assign(SVCTHREAD *this_thread, struct svc_req *req)
  276 {
  277         return (fha_assign(this_thread, req, &fhanew_softc));
  278 }

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

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