nfs_fha_new.c

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

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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