nfs_nfsdkrpc.c revision 1.2.10.3
1 1.2.10.2 tls /* $NetBSD: nfs_nfsdkrpc.c,v 1.2.10.3 2017/12/03 11:38:42 jdolecek Exp $ */ 2 1.2.10.2 tls /*- 3 1.2.10.2 tls * Copyright (c) 1989, 1993 4 1.2.10.2 tls * The Regents of the University of California. All rights reserved. 5 1.2.10.2 tls * 6 1.2.10.2 tls * This code is derived from software contributed to Berkeley by 7 1.2.10.2 tls * Rick Macklem at The University of Guelph. 8 1.2.10.2 tls * 9 1.2.10.2 tls * Redistribution and use in source and binary forms, with or without 10 1.2.10.2 tls * modification, are permitted provided that the following conditions 11 1.2.10.2 tls * are met: 12 1.2.10.2 tls * 1. Redistributions of source code must retain the above copyright 13 1.2.10.2 tls * notice, this list of conditions and the following disclaimer. 14 1.2.10.2 tls * 2. Redistributions in binary form must reproduce the above copyright 15 1.2.10.2 tls * notice, this list of conditions and the following disclaimer in the 16 1.2.10.2 tls * documentation and/or other materials provided with the distribution. 17 1.2.10.2 tls * 4. Neither the name of the University nor the names of its contributors 18 1.2.10.2 tls * may be used to endorse or promote products derived from this software 19 1.2.10.2 tls * without specific prior written permission. 20 1.2.10.2 tls * 21 1.2.10.2 tls * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 1.2.10.2 tls * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 1.2.10.2 tls * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 1.2.10.2 tls * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 1.2.10.2 tls * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 1.2.10.2 tls * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 1.2.10.2 tls * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 1.2.10.2 tls * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 1.2.10.2 tls * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 1.2.10.2 tls * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 1.2.10.2 tls * SUCH DAMAGE. 32 1.2.10.2 tls * 33 1.2.10.2 tls */ 34 1.2.10.2 tls 35 1.2.10.2 tls #include <sys/cdefs.h> 36 1.2.10.3 jdolecek /* __FBSDID("FreeBSD: head/sys/fs/nfsserver/nfs_nfsdkrpc.c 299203 2016-05-06 23:40:37Z pfg "); */ 37 1.2.10.2 tls __RCSID("$NetBSD: nfs_nfsdkrpc.c,v 1.2.10.3 2017/12/03 11:38:42 jdolecek Exp $"); 38 1.2.10.2 tls 39 1.2.10.3 jdolecek #ifdef _KERNEL_OPT 40 1.2.10.2 tls #include "opt_inet6.h" 41 1.2.10.3 jdolecek #if 0 42 1.2.10.2 tls #include "opt_kgssapi.h" 43 1.2.10.3 jdolecek #endif 44 1.2.10.3 jdolecek #endif 45 1.2.10.2 tls 46 1.2.10.3 jdolecek #include <fs/nfs/common/nfsport.h> 47 1.2.10.2 tls 48 1.2.10.2 tls #include <rpc/rpc.h> 49 1.2.10.2 tls #include <rpc/rpcsec_gss.h> 50 1.2.10.2 tls 51 1.2.10.3 jdolecek #include <fs/nfs/common/nfs_fha.h> 52 1.2.10.3 jdolecek #include <fs/nfs/server/nfs_fha_new.h> 53 1.2.10.2 tls 54 1.2.10.3 jdolecek #if 0 55 1.2.10.2 tls #include <security/mac/mac_framework.h> 56 1.2.10.3 jdolecek #endif 57 1.2.10.2 tls 58 1.2.10.2 tls NFSDLOCKMUTEX; 59 1.2.10.2 tls NFSV4ROOTLOCKMUTEX; 60 1.2.10.2 tls struct nfsv4lock nfsd_suspend_lock; 61 1.2.10.2 tls 62 1.2.10.2 tls /* 63 1.2.10.2 tls * Mapping of old NFS Version 2 RPC numbers to generic numbers. 64 1.2.10.2 tls */ 65 1.2.10.2 tls int newnfs_nfsv3_procid[NFS_V3NPROCS] = { 66 1.2.10.2 tls NFSPROC_NULL, 67 1.2.10.2 tls NFSPROC_GETATTR, 68 1.2.10.2 tls NFSPROC_SETATTR, 69 1.2.10.2 tls NFSPROC_NOOP, 70 1.2.10.2 tls NFSPROC_LOOKUP, 71 1.2.10.2 tls NFSPROC_READLINK, 72 1.2.10.2 tls NFSPROC_READ, 73 1.2.10.2 tls NFSPROC_NOOP, 74 1.2.10.2 tls NFSPROC_WRITE, 75 1.2.10.2 tls NFSPROC_CREATE, 76 1.2.10.2 tls NFSPROC_REMOVE, 77 1.2.10.2 tls NFSPROC_RENAME, 78 1.2.10.2 tls NFSPROC_LINK, 79 1.2.10.2 tls NFSPROC_SYMLINK, 80 1.2.10.2 tls NFSPROC_MKDIR, 81 1.2.10.2 tls NFSPROC_RMDIR, 82 1.2.10.2 tls NFSPROC_READDIR, 83 1.2.10.2 tls NFSPROC_FSSTAT, 84 1.2.10.2 tls NFSPROC_NOOP, 85 1.2.10.2 tls NFSPROC_NOOP, 86 1.2.10.2 tls NFSPROC_NOOP, 87 1.2.10.2 tls NFSPROC_NOOP, 88 1.2.10.2 tls }; 89 1.2.10.2 tls 90 1.2.10.2 tls 91 1.2.10.2 tls SYSCTL_DECL(_vfs_nfsd); 92 1.2.10.2 tls 93 1.2.10.2 tls SVCPOOL *nfsrvd_pool; 94 1.2.10.2 tls 95 1.2.10.2 tls static int nfs_privport = 0; 96 1.2.10.3 jdolecek SYSCTL_INT(_vfs_nfsd, OID_AUTO, nfs_privport, CTLFLAG_RWTUN, 97 1.2.10.2 tls &nfs_privport, 0, 98 1.2.10.2 tls "Only allow clients using a privileged port for NFSv2 and 3"); 99 1.2.10.2 tls 100 1.2.10.2 tls static int nfs_minvers = NFS_VER2; 101 1.2.10.3 jdolecek SYSCTL_INT(_vfs_nfsd, OID_AUTO, server_min_nfsvers, CTLFLAG_RWTUN, 102 1.2.10.2 tls &nfs_minvers, 0, "The lowest version of NFS handled by the server"); 103 1.2.10.2 tls 104 1.2.10.2 tls static int nfs_maxvers = NFS_VER4; 105 1.2.10.3 jdolecek SYSCTL_INT(_vfs_nfsd, OID_AUTO, server_max_nfsvers, CTLFLAG_RWTUN, 106 1.2.10.2 tls &nfs_maxvers, 0, "The highest version of NFS handled by the server"); 107 1.2.10.2 tls 108 1.2.10.3 jdolecek static int nfs_proc(struct nfsrv_descript *, u_int32_t, SVCXPRT *xprt, 109 1.2.10.3 jdolecek struct nfsrvcache **); 110 1.2.10.2 tls 111 1.2.10.2 tls extern u_long sb_max_adj; 112 1.2.10.2 tls extern int newnfs_numnfsd; 113 1.2.10.2 tls extern struct proc *nfsd_master_proc; 114 1.2.10.2 tls 115 1.2.10.2 tls /* 116 1.2.10.2 tls * NFS server system calls 117 1.2.10.2 tls */ 118 1.2.10.2 tls 119 1.2.10.2 tls static void 120 1.2.10.2 tls nfssvc_program(struct svc_req *rqst, SVCXPRT *xprt) 121 1.2.10.2 tls { 122 1.2.10.2 tls struct nfsrv_descript nd; 123 1.2.10.2 tls struct nfsrvcache *rp = NULL; 124 1.2.10.2 tls int cacherep, credflavor; 125 1.2.10.2 tls 126 1.2.10.2 tls memset(&nd, 0, sizeof(nd)); 127 1.2.10.2 tls if (rqst->rq_vers == NFS_VER2) { 128 1.2.10.3 jdolecek if (rqst->rq_proc > NFSV2PROC_STATFS || 129 1.2.10.3 jdolecek newnfs_nfsv3_procid[rqst->rq_proc] == NFSPROC_NOOP) { 130 1.2.10.2 tls svcerr_noproc(rqst); 131 1.2.10.2 tls svc_freereq(rqst); 132 1.2.10.2 tls goto out; 133 1.2.10.2 tls } 134 1.2.10.2 tls nd.nd_procnum = newnfs_nfsv3_procid[rqst->rq_proc]; 135 1.2.10.2 tls nd.nd_flag = ND_NFSV2; 136 1.2.10.2 tls } else if (rqst->rq_vers == NFS_VER3) { 137 1.2.10.2 tls if (rqst->rq_proc >= NFS_V3NPROCS) { 138 1.2.10.2 tls svcerr_noproc(rqst); 139 1.2.10.2 tls svc_freereq(rqst); 140 1.2.10.2 tls goto out; 141 1.2.10.2 tls } 142 1.2.10.2 tls nd.nd_procnum = rqst->rq_proc; 143 1.2.10.2 tls nd.nd_flag = ND_NFSV3; 144 1.2.10.2 tls } else { 145 1.2.10.2 tls if (rqst->rq_proc != NFSPROC_NULL && 146 1.2.10.2 tls rqst->rq_proc != NFSV4PROC_COMPOUND) { 147 1.2.10.2 tls svcerr_noproc(rqst); 148 1.2.10.2 tls svc_freereq(rqst); 149 1.2.10.2 tls goto out; 150 1.2.10.2 tls } 151 1.2.10.2 tls nd.nd_procnum = rqst->rq_proc; 152 1.2.10.2 tls nd.nd_flag = ND_NFSV4; 153 1.2.10.2 tls } 154 1.2.10.2 tls 155 1.2.10.2 tls /* 156 1.2.10.2 tls * Note: we want rq_addr, not svc_getrpccaller for nd_nam2 - 157 1.2.10.2 tls * NFS_SRVMAXDATA uses a NULL value for nd_nam2 to detect TCP 158 1.2.10.2 tls * mounts. 159 1.2.10.2 tls */ 160 1.2.10.2 tls nd.nd_mrep = rqst->rq_args; 161 1.2.10.2 tls rqst->rq_args = NULL; 162 1.2.10.2 tls newnfs_realign(&nd.nd_mrep, M_WAITOK); 163 1.2.10.2 tls nd.nd_md = nd.nd_mrep; 164 1.2.10.2 tls nd.nd_dpos = mtod(nd.nd_md, caddr_t); 165 1.2.10.2 tls nd.nd_nam = svc_getrpccaller(rqst); 166 1.2.10.2 tls nd.nd_nam2 = rqst->rq_addr; 167 1.2.10.2 tls nd.nd_mreq = NULL; 168 1.2.10.2 tls nd.nd_cred = NULL; 169 1.2.10.2 tls 170 1.2.10.2 tls if (nfs_privport && (nd.nd_flag & ND_NFSV4) == 0) { 171 1.2.10.2 tls /* Check if source port is privileged */ 172 1.2.10.2 tls u_short port; 173 1.2.10.2 tls struct sockaddr *nam = nd.nd_nam; 174 1.2.10.2 tls struct sockaddr_in *sin; 175 1.2.10.2 tls 176 1.2.10.2 tls sin = (struct sockaddr_in *)nam; 177 1.2.10.2 tls /* 178 1.2.10.2 tls * INET/INET6 - same code: 179 1.2.10.2 tls * sin_port and sin6_port are at same offset 180 1.2.10.2 tls */ 181 1.2.10.2 tls port = ntohs(sin->sin_port); 182 1.2.10.2 tls if (port >= IPPORT_RESERVED && 183 1.2.10.2 tls nd.nd_procnum != NFSPROC_NULL) { 184 1.2.10.2 tls #ifdef INET6 185 1.2.10.2 tls char b6[INET6_ADDRSTRLEN]; 186 1.2.10.3 jdolecek #if defined(_MODULE) 187 1.2.10.2 tls /* Do not use ip6_sprintf: the nfs module should work without INET6. */ 188 1.2.10.2 tls #define ip6_sprintf(buf, a) \ 189 1.2.10.2 tls (snprintf((buf), sizeof(buf), "%x:%x:%x:%x:%x:%x:%x:%x", \ 190 1.2.10.2 tls (a)->s6_addr16[0], (a)->s6_addr16[1], \ 191 1.2.10.2 tls (a)->s6_addr16[2], (a)->s6_addr16[3], \ 192 1.2.10.2 tls (a)->s6_addr16[4], (a)->s6_addr16[5], \ 193 1.2.10.2 tls (a)->s6_addr16[6], (a)->s6_addr16[7]), \ 194 1.2.10.2 tls (buf)) 195 1.2.10.2 tls #endif 196 1.2.10.2 tls #endif 197 1.2.10.2 tls printf("NFS request from unprivileged port (%s:%d)\n", 198 1.2.10.2 tls #ifdef INET6 199 1.2.10.2 tls sin->sin_family == AF_INET6 ? 200 1.2.10.2 tls ip6_sprintf(b6, &satosin6(sin)->sin6_addr) : 201 1.2.10.3 jdolecek #if defined(_MODULE) 202 1.2.10.2 tls #undef ip6_sprintf 203 1.2.10.2 tls #endif 204 1.2.10.2 tls #endif 205 1.2.10.2 tls inet_ntoa(sin->sin_addr), port); 206 1.2.10.2 tls svcerr_weakauth(rqst); 207 1.2.10.2 tls svc_freereq(rqst); 208 1.2.10.2 tls m_freem(nd.nd_mrep); 209 1.2.10.2 tls goto out; 210 1.2.10.2 tls } 211 1.2.10.2 tls } 212 1.2.10.2 tls 213 1.2.10.2 tls if (nd.nd_procnum != NFSPROC_NULL) { 214 1.2.10.2 tls if (!svc_getcred(rqst, &nd.nd_cred, &credflavor)) { 215 1.2.10.2 tls svcerr_weakauth(rqst); 216 1.2.10.2 tls svc_freereq(rqst); 217 1.2.10.2 tls m_freem(nd.nd_mrep); 218 1.2.10.2 tls goto out; 219 1.2.10.2 tls } 220 1.2.10.2 tls 221 1.2.10.2 tls /* Set the flag based on credflavor */ 222 1.2.10.2 tls if (credflavor == RPCSEC_GSS_KRB5) { 223 1.2.10.2 tls nd.nd_flag |= ND_GSS; 224 1.2.10.2 tls } else if (credflavor == RPCSEC_GSS_KRB5I) { 225 1.2.10.2 tls nd.nd_flag |= (ND_GSS | ND_GSSINTEGRITY); 226 1.2.10.2 tls } else if (credflavor == RPCSEC_GSS_KRB5P) { 227 1.2.10.2 tls nd.nd_flag |= (ND_GSS | ND_GSSPRIVACY); 228 1.2.10.2 tls } else if (credflavor != AUTH_SYS) { 229 1.2.10.2 tls svcerr_weakauth(rqst); 230 1.2.10.2 tls svc_freereq(rqst); 231 1.2.10.2 tls m_freem(nd.nd_mrep); 232 1.2.10.2 tls goto out; 233 1.2.10.2 tls } 234 1.2.10.2 tls 235 1.2.10.2 tls #ifdef MAC 236 1.2.10.2 tls mac_cred_associate_nfsd(nd.nd_cred); 237 1.2.10.2 tls #endif 238 1.2.10.2 tls /* 239 1.2.10.2 tls * Get a refcnt (shared lock) on nfsd_suspend_lock. 240 1.2.10.2 tls * NFSSVC_SUSPENDNFSD will take an exclusive lock on 241 1.2.10.2 tls * nfsd_suspend_lock to suspend these threads. 242 1.2.10.3 jdolecek * The call to nfsv4_lock() that precedes nfsv4_getref() 243 1.2.10.3 jdolecek * ensures that the acquisition of the exclusive lock 244 1.2.10.3 jdolecek * takes priority over acquisition of the shared lock by 245 1.2.10.3 jdolecek * waiting for any exclusive lock request to complete. 246 1.2.10.2 tls * This must be done here, before the check of 247 1.2.10.2 tls * nfsv4root exports by nfsvno_v4rootexport(). 248 1.2.10.2 tls */ 249 1.2.10.2 tls NFSLOCKV4ROOTMUTEX(); 250 1.2.10.3 jdolecek nfsv4_lock(&nfsd_suspend_lock, 0, NULL, NFSV4ROOTLOCKMUTEXPTR, 251 1.2.10.3 jdolecek NULL); 252 1.2.10.2 tls nfsv4_getref(&nfsd_suspend_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, 253 1.2.10.2 tls NULL); 254 1.2.10.2 tls NFSUNLOCKV4ROOTMUTEX(); 255 1.2.10.2 tls 256 1.2.10.2 tls if ((nd.nd_flag & ND_NFSV4) != 0) { 257 1.2.10.2 tls nd.nd_repstat = nfsvno_v4rootexport(&nd); 258 1.2.10.2 tls if (nd.nd_repstat != 0) { 259 1.2.10.2 tls NFSLOCKV4ROOTMUTEX(); 260 1.2.10.2 tls nfsv4_relref(&nfsd_suspend_lock); 261 1.2.10.2 tls NFSUNLOCKV4ROOTMUTEX(); 262 1.2.10.2 tls svcerr_weakauth(rqst); 263 1.2.10.2 tls svc_freereq(rqst); 264 1.2.10.2 tls m_freem(nd.nd_mrep); 265 1.2.10.2 tls goto out; 266 1.2.10.2 tls } 267 1.2.10.2 tls } 268 1.2.10.2 tls 269 1.2.10.3 jdolecek cacherep = nfs_proc(&nd, rqst->rq_xid, xprt, &rp); 270 1.2.10.2 tls NFSLOCKV4ROOTMUTEX(); 271 1.2.10.2 tls nfsv4_relref(&nfsd_suspend_lock); 272 1.2.10.2 tls NFSUNLOCKV4ROOTMUTEX(); 273 1.2.10.2 tls } else { 274 1.2.10.2 tls NFSMGET(nd.nd_mreq); 275 1.2.10.2 tls nd.nd_mreq->m_len = 0; 276 1.2.10.2 tls cacherep = RC_REPLY; 277 1.2.10.2 tls } 278 1.2.10.2 tls if (nd.nd_mrep != NULL) 279 1.2.10.2 tls m_freem(nd.nd_mrep); 280 1.2.10.2 tls 281 1.2.10.2 tls if (nd.nd_cred != NULL) 282 1.2.10.2 tls crfree(nd.nd_cred); 283 1.2.10.2 tls 284 1.2.10.2 tls if (cacherep == RC_DROPIT) { 285 1.2.10.2 tls if (nd.nd_mreq != NULL) 286 1.2.10.2 tls m_freem(nd.nd_mreq); 287 1.2.10.2 tls svc_freereq(rqst); 288 1.2.10.2 tls goto out; 289 1.2.10.2 tls } 290 1.2.10.2 tls 291 1.2.10.2 tls if (nd.nd_mreq == NULL) { 292 1.2.10.2 tls svcerr_decode(rqst); 293 1.2.10.2 tls svc_freereq(rqst); 294 1.2.10.2 tls goto out; 295 1.2.10.2 tls } 296 1.2.10.2 tls 297 1.2.10.2 tls if (nd.nd_repstat & NFSERR_AUTHERR) { 298 1.2.10.2 tls svcerr_auth(rqst, nd.nd_repstat & ~NFSERR_AUTHERR); 299 1.2.10.2 tls if (nd.nd_mreq != NULL) 300 1.2.10.2 tls m_freem(nd.nd_mreq); 301 1.2.10.2 tls } else if (!svc_sendreply_mbuf(rqst, nd.nd_mreq)) { 302 1.2.10.2 tls svcerr_systemerr(rqst); 303 1.2.10.2 tls } 304 1.2.10.3 jdolecek if (rp != NULL) { 305 1.2.10.3 jdolecek nfsrvd_sentcache(rp, (rqst->rq_reply_seq != 0 || 306 1.2.10.3 jdolecek SVC_ACK(xprt, NULL)), rqst->rq_reply_seq); 307 1.2.10.3 jdolecek } 308 1.2.10.2 tls svc_freereq(rqst); 309 1.2.10.2 tls 310 1.2.10.2 tls out: 311 1.2.10.3 jdolecek if (softdep_ast_cleanup != NULL) 312 1.2.10.3 jdolecek softdep_ast_cleanup(); 313 1.2.10.2 tls NFSEXITCODE(0); 314 1.2.10.2 tls } 315 1.2.10.2 tls 316 1.2.10.2 tls /* 317 1.2.10.2 tls * Check the cache and, optionally, do the RPC. 318 1.2.10.2 tls * Return the appropriate cache response. 319 1.2.10.2 tls */ 320 1.2.10.2 tls static int 321 1.2.10.3 jdolecek nfs_proc(struct nfsrv_descript *nd, u_int32_t xid, SVCXPRT *xprt, 322 1.2.10.3 jdolecek struct nfsrvcache **rpp) 323 1.2.10.2 tls { 324 1.2.10.2 tls struct thread *td = curthread; 325 1.2.10.3 jdolecek int cacherep = RC_DOIT, isdgram, taglen = -1; 326 1.2.10.3 jdolecek struct mbuf *m; 327 1.2.10.3 jdolecek u_char tag[NFSV4_SMALLSTR + 1], *tagstr = NULL; 328 1.2.10.3 jdolecek u_int32_t minorvers = 0; 329 1.2.10.3 jdolecek uint32_t ack; 330 1.2.10.2 tls 331 1.2.10.2 tls *rpp = NULL; 332 1.2.10.2 tls if (nd->nd_nam2 == NULL) { 333 1.2.10.2 tls nd->nd_flag |= ND_STREAMSOCK; 334 1.2.10.2 tls isdgram = 0; 335 1.2.10.2 tls } else { 336 1.2.10.2 tls isdgram = 1; 337 1.2.10.2 tls } 338 1.2.10.2 tls 339 1.2.10.2 tls /* 340 1.2.10.2 tls * Two cases: 341 1.2.10.2 tls * 1 - For NFSv2 over UDP, if we are near our malloc/mget 342 1.2.10.2 tls * limit, just drop the request. There is no 343 1.2.10.2 tls * NFSERR_RESOURCE or NFSERR_DELAY for NFSv2 and the 344 1.2.10.2 tls * client will timeout/retry over UDP in a little while. 345 1.2.10.2 tls * 2 - nd_repstat == 0 && nd_mreq == NULL, which 346 1.2.10.2 tls * means a normal nfs rpc, so check the cache 347 1.2.10.2 tls */ 348 1.2.10.2 tls if ((nd->nd_flag & ND_NFSV2) && nd->nd_nam2 != NULL && 349 1.2.10.2 tls nfsrv_mallocmget_limit()) { 350 1.2.10.2 tls cacherep = RC_DROPIT; 351 1.2.10.2 tls } else { 352 1.2.10.2 tls /* 353 1.2.10.2 tls * For NFSv3, play it safe and assume that the client is 354 1.2.10.2 tls * doing retries on the same TCP connection. 355 1.2.10.2 tls */ 356 1.2.10.2 tls if ((nd->nd_flag & (ND_NFSV4 | ND_STREAMSOCK)) == 357 1.2.10.2 tls ND_STREAMSOCK) 358 1.2.10.2 tls nd->nd_flag |= ND_SAMETCPCONN; 359 1.2.10.2 tls nd->nd_retxid = xid; 360 1.2.10.2 tls nd->nd_tcpconntime = NFSD_MONOSEC; 361 1.2.10.3 jdolecek nd->nd_sockref = xprt->xp_sockref; 362 1.2.10.3 jdolecek if ((nd->nd_flag & ND_NFSV4) != 0) 363 1.2.10.3 jdolecek nfsd_getminorvers(nd, tag, &tagstr, &taglen, 364 1.2.10.3 jdolecek &minorvers); 365 1.2.10.3 jdolecek if ((nd->nd_flag & ND_NFSV41) != 0) 366 1.2.10.3 jdolecek /* NFSv4.1 caches replies in the session slots. */ 367 1.2.10.3 jdolecek cacherep = RC_DOIT; 368 1.2.10.3 jdolecek else { 369 1.2.10.3 jdolecek cacherep = nfsrvd_getcache(nd); 370 1.2.10.3 jdolecek ack = 0; 371 1.2.10.3 jdolecek SVC_ACK(xprt, &ack); 372 1.2.10.3 jdolecek nfsrc_trimcache(xprt->xp_sockref, ack, 0); 373 1.2.10.3 jdolecek } 374 1.2.10.2 tls } 375 1.2.10.2 tls 376 1.2.10.2 tls /* 377 1.2.10.2 tls * Handle the request. There are three cases. 378 1.2.10.2 tls * RC_DOIT - do the RPC 379 1.2.10.2 tls * RC_REPLY - return the reply already created 380 1.2.10.2 tls * RC_DROPIT - just throw the request away 381 1.2.10.2 tls */ 382 1.2.10.2 tls if (cacherep == RC_DOIT) { 383 1.2.10.3 jdolecek if ((nd->nd_flag & ND_NFSV41) != 0) 384 1.2.10.3 jdolecek nd->nd_xprt = xprt; 385 1.2.10.3 jdolecek nfsrvd_dorpc(nd, isdgram, tagstr, taglen, minorvers, td); 386 1.2.10.3 jdolecek if ((nd->nd_flag & ND_NFSV41) != 0) { 387 1.2.10.3 jdolecek if (nd->nd_repstat != NFSERR_REPLYFROMCACHE && 388 1.2.10.3 jdolecek (nd->nd_flag & ND_SAVEREPLY) != 0) { 389 1.2.10.3 jdolecek /* Cache a copy of the reply. */ 390 1.2.10.3 jdolecek m = m_copym(nd->nd_mreq, 0, M_COPYALL, 391 1.2.10.3 jdolecek M_WAITOK); 392 1.2.10.3 jdolecek } else 393 1.2.10.3 jdolecek m = NULL; 394 1.2.10.3 jdolecek if ((nd->nd_flag & ND_HASSEQUENCE) != 0) 395 1.2.10.3 jdolecek nfsrv_cache_session(nd->nd_sessionid, 396 1.2.10.3 jdolecek nd->nd_slotid, nd->nd_repstat, &m); 397 1.2.10.3 jdolecek if (nd->nd_repstat == NFSERR_REPLYFROMCACHE) 398 1.2.10.3 jdolecek nd->nd_repstat = 0; 399 1.2.10.2 tls cacherep = RC_REPLY; 400 1.2.10.3 jdolecek } else { 401 1.2.10.3 jdolecek if (nd->nd_repstat == NFSERR_DONTREPLY) 402 1.2.10.3 jdolecek cacherep = RC_DROPIT; 403 1.2.10.3 jdolecek else 404 1.2.10.3 jdolecek cacherep = RC_REPLY; 405 1.2.10.3 jdolecek *rpp = nfsrvd_updatecache(nd); 406 1.2.10.3 jdolecek } 407 1.2.10.2 tls } 408 1.2.10.3 jdolecek if (tagstr != NULL && taglen > NFSV4_SMALLSTR) 409 1.2.10.3 jdolecek free(tagstr, M_TEMP); 410 1.2.10.2 tls 411 1.2.10.2 tls NFSEXITCODE2(0, nd); 412 1.2.10.2 tls return (cacherep); 413 1.2.10.2 tls } 414 1.2.10.2 tls 415 1.2.10.3 jdolecek static void 416 1.2.10.3 jdolecek nfssvc_loss(SVCXPRT *xprt) 417 1.2.10.3 jdolecek { 418 1.2.10.3 jdolecek uint32_t ack; 419 1.2.10.3 jdolecek 420 1.2.10.3 jdolecek ack = 0; 421 1.2.10.3 jdolecek SVC_ACK(xprt, &ack); 422 1.2.10.3 jdolecek nfsrc_trimcache(xprt->xp_sockref, ack, 1); 423 1.2.10.3 jdolecek } 424 1.2.10.3 jdolecek 425 1.2.10.2 tls /* 426 1.2.10.2 tls * Adds a socket to the list for servicing by nfsds. 427 1.2.10.2 tls */ 428 1.2.10.2 tls int 429 1.2.10.2 tls nfsrvd_addsock(struct file *fp) 430 1.2.10.2 tls { 431 1.2.10.2 tls int siz; 432 1.2.10.2 tls struct socket *so; 433 1.2.10.2 tls int error = 0; 434 1.2.10.2 tls SVCXPRT *xprt; 435 1.2.10.2 tls static u_int64_t sockref = 0; 436 1.2.10.2 tls 437 1.2.10.2 tls so = fp->f_data; 438 1.2.10.2 tls 439 1.2.10.2 tls siz = sb_max_adj; 440 1.2.10.2 tls error = soreserve(so, siz, siz); 441 1.2.10.2 tls if (error) 442 1.2.10.2 tls goto out; 443 1.2.10.2 tls 444 1.2.10.2 tls /* 445 1.2.10.2 tls * Steal the socket from userland so that it doesn't close 446 1.2.10.2 tls * unexpectedly. 447 1.2.10.2 tls */ 448 1.2.10.2 tls if (so->so_type == SOCK_DGRAM) 449 1.2.10.2 tls xprt = svc_dg_create(nfsrvd_pool, so, 0, 0); 450 1.2.10.2 tls else 451 1.2.10.2 tls xprt = svc_vc_create(nfsrvd_pool, so, 0, 0); 452 1.2.10.2 tls if (xprt) { 453 1.2.10.2 tls fp->f_ops = &badfileops; 454 1.2.10.2 tls fp->f_data = NULL; 455 1.2.10.2 tls xprt->xp_sockref = ++sockref; 456 1.2.10.2 tls if (nfs_minvers == NFS_VER2) 457 1.2.10.2 tls svc_reg(xprt, NFS_PROG, NFS_VER2, nfssvc_program, 458 1.2.10.2 tls NULL); 459 1.2.10.2 tls if (nfs_minvers <= NFS_VER3 && nfs_maxvers >= NFS_VER3) 460 1.2.10.2 tls svc_reg(xprt, NFS_PROG, NFS_VER3, nfssvc_program, 461 1.2.10.2 tls NULL); 462 1.2.10.2 tls if (nfs_maxvers >= NFS_VER4) 463 1.2.10.2 tls svc_reg(xprt, NFS_PROG, NFS_VER4, nfssvc_program, 464 1.2.10.2 tls NULL); 465 1.2.10.3 jdolecek if (so->so_type == SOCK_STREAM) 466 1.2.10.3 jdolecek svc_loss_reg(xprt, nfssvc_loss); 467 1.2.10.2 tls SVC_RELEASE(xprt); 468 1.2.10.2 tls } 469 1.2.10.2 tls 470 1.2.10.2 tls out: 471 1.2.10.2 tls NFSEXITCODE(error); 472 1.2.10.2 tls return (error); 473 1.2.10.2 tls } 474 1.2.10.2 tls 475 1.2.10.2 tls /* 476 1.2.10.2 tls * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 477 1.2.10.2 tls * until it is killed by a signal. 478 1.2.10.2 tls */ 479 1.2.10.2 tls int 480 1.2.10.2 tls nfsrvd_nfsd(struct thread *td, struct nfsd_nfsd_args *args) 481 1.2.10.2 tls { 482 1.2.10.2 tls char principal[MAXHOSTNAMELEN + 5]; 483 1.2.10.3 jdolecek struct proc *p; 484 1.2.10.2 tls int error = 0; 485 1.2.10.2 tls bool_t ret2, ret3, ret4; 486 1.2.10.2 tls 487 1.2.10.2 tls error = copyinstr(args->principal, principal, sizeof (principal), 488 1.2.10.2 tls NULL); 489 1.2.10.2 tls if (error) 490 1.2.10.2 tls goto out; 491 1.2.10.2 tls 492 1.2.10.2 tls /* 493 1.2.10.2 tls * Only the first nfsd actually does any work. The RPC code 494 1.2.10.2 tls * adds threads to it as needed. Any extra processes offered 495 1.2.10.2 tls * by nfsd just exit. If nfsd is new enough, it will call us 496 1.2.10.2 tls * once with a structure that specifies how many threads to 497 1.2.10.2 tls * use. 498 1.2.10.2 tls */ 499 1.2.10.2 tls NFSD_LOCK(); 500 1.2.10.2 tls if (newnfs_numnfsd == 0) { 501 1.2.10.3 jdolecek p = td->td_proc; 502 1.2.10.3 jdolecek PROC_LOCK(p); 503 1.2.10.3 jdolecek p->p_flag2 |= P2_AST_SU; 504 1.2.10.3 jdolecek PROC_UNLOCK(p); 505 1.2.10.2 tls newnfs_numnfsd++; 506 1.2.10.2 tls 507 1.2.10.2 tls NFSD_UNLOCK(); 508 1.2.10.2 tls 509 1.2.10.2 tls /* An empty string implies AUTH_SYS only. */ 510 1.2.10.2 tls if (principal[0] != '\0') { 511 1.2.10.2 tls ret2 = rpc_gss_set_svc_name_call(principal, 512 1.2.10.2 tls "kerberosv5", GSS_C_INDEFINITE, NFS_PROG, NFS_VER2); 513 1.2.10.2 tls ret3 = rpc_gss_set_svc_name_call(principal, 514 1.2.10.2 tls "kerberosv5", GSS_C_INDEFINITE, NFS_PROG, NFS_VER3); 515 1.2.10.2 tls ret4 = rpc_gss_set_svc_name_call(principal, 516 1.2.10.2 tls "kerberosv5", GSS_C_INDEFINITE, NFS_PROG, NFS_VER4); 517 1.2.10.2 tls 518 1.2.10.2 tls if (!ret2 || !ret3 || !ret4) 519 1.2.10.2 tls printf("nfsd: can't register svc name\n"); 520 1.2.10.2 tls } 521 1.2.10.2 tls 522 1.2.10.2 tls nfsrvd_pool->sp_minthreads = args->minthreads; 523 1.2.10.2 tls nfsrvd_pool->sp_maxthreads = args->maxthreads; 524 1.2.10.2 tls 525 1.2.10.2 tls svc_run(nfsrvd_pool); 526 1.2.10.2 tls 527 1.2.10.2 tls if (principal[0] != '\0') { 528 1.2.10.2 tls rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER2); 529 1.2.10.2 tls rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER3); 530 1.2.10.2 tls rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER4); 531 1.2.10.2 tls } 532 1.2.10.2 tls 533 1.2.10.2 tls NFSD_LOCK(); 534 1.2.10.2 tls newnfs_numnfsd--; 535 1.2.10.2 tls nfsrvd_init(1); 536 1.2.10.3 jdolecek PROC_LOCK(p); 537 1.2.10.3 jdolecek p->p_flag2 &= ~P2_AST_SU; 538 1.2.10.3 jdolecek PROC_UNLOCK(p); 539 1.2.10.2 tls } 540 1.2.10.2 tls NFSD_UNLOCK(); 541 1.2.10.2 tls 542 1.2.10.2 tls out: 543 1.2.10.2 tls NFSEXITCODE(error); 544 1.2.10.2 tls return (error); 545 1.2.10.2 tls } 546 1.2.10.2 tls 547 1.2.10.2 tls /* 548 1.2.10.2 tls * Initialize the data structures for the server. 549 1.2.10.2 tls * Handshake with any new nfsds starting up to avoid any chance of 550 1.2.10.2 tls * corruption. 551 1.2.10.2 tls */ 552 1.2.10.2 tls void 553 1.2.10.2 tls nfsrvd_init(int terminating) 554 1.2.10.2 tls { 555 1.2.10.2 tls 556 1.2.10.2 tls NFSD_LOCK_ASSERT(); 557 1.2.10.2 tls 558 1.2.10.2 tls if (terminating) { 559 1.2.10.2 tls nfsd_master_proc = NULL; 560 1.2.10.2 tls NFSD_UNLOCK(); 561 1.2.10.3 jdolecek nfsrv_freeallbackchannel_xprts(); 562 1.2.10.2 tls svcpool_destroy(nfsrvd_pool); 563 1.2.10.2 tls nfsrvd_pool = NULL; 564 1.2.10.2 tls NFSD_LOCK(); 565 1.2.10.2 tls } 566 1.2.10.2 tls 567 1.2.10.2 tls NFSD_UNLOCK(); 568 1.2.10.2 tls 569 1.2.10.2 tls nfsrvd_pool = svcpool_create("nfsd", SYSCTL_STATIC_CHILDREN(_vfs_nfsd)); 570 1.2.10.2 tls nfsrvd_pool->sp_rcache = NULL; 571 1.2.10.2 tls nfsrvd_pool->sp_assign = fhanew_assign; 572 1.2.10.2 tls nfsrvd_pool->sp_done = fha_nd_complete; 573 1.2.10.2 tls 574 1.2.10.2 tls NFSD_LOCK(); 575 1.2.10.2 tls } 576 1.2.10.2 tls 577
Indexes created Thu Oct 02 01:09:59 GMT 2025