1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 /* 38 * Functions that need to be different for different versions of BSD 39 * kernel should be kept here, along with any global storage specific 40 * to this BSD variant. 41 */ 42 #include <fs/nfs/nfsport.h> 43 #include <sys/sysctl.h> 44 #include <vm/vm.h> 45 #include <vm/vm_object.h> 46 #include <vm/vm_page.h> 47 #include <vm/vm_param.h> 48 #include <vm/vm_map.h> 49 #include <vm/vm_kern.h> 50 #include <vm/vm_extern.h> 51 #include <vm/uma.h> 52 #include <vm/uma_int.h> 53 54 extern int nfscl_ticks; 55 extern int nfsrv_nfsuserd; 56 extern struct nfssockreq nfsrv_nfsuserdsock; 57 extern void (*nfsd_call_recall)(struct vnode *, int, struct ucred *, 58 struct thread *); 59 extern int nfsrv_useacl; 60 struct mount nfsv4root_mnt; 61 int newnfs_numnfsd = 0; 62 struct nfsstats newnfsstats; 63 int nfs_numnfscbd = 0; 64 char nfsv4_callbackaddr[INET6_ADDRSTRLEN]; 65 struct callout newnfsd_callout; 66 void (*nfsd_call_servertimer)(void) = NULL; 67 void (*ncl_call_invalcaches)(struct vnode *) = NULL; 68 69 static int nfs_realign_test; 70 static int nfs_realign_count; 71 72 SYSCTL_NODE(_vfs, OID_AUTO, newnfs, CTLFLAG_RW, 0, "New NFS filesystem"); 73 SYSCTL_INT(_vfs_newnfs, OID_AUTO, realign_test, CTLFLAG_RW, &nfs_realign_test, 0, ""); 74 SYSCTL_INT(_vfs_newnfs, OID_AUTO, realign_count, CTLFLAG_RW, &nfs_realign_count, 0, ""); 75 SYSCTL_INT(_vfs_newnfs, OID_AUTO, nfs4acl_enable, CTLFLAG_RW, &nfsrv_useacl, 0, ""); 76 SYSCTL_STRING(_vfs_newnfs, OID_AUTO, callback_addr, CTLFLAG_RW, 77 nfsv4_callbackaddr, sizeof(nfsv4_callbackaddr), ""); 78 79 /* 80 * Defines for malloc 81 * (Here for FreeBSD, since they allocate storage.) 82 */ 83 MALLOC_DEFINE(M_NEWNFSRVCACHE, "NFSD srvcache", "NFSD Server Request Cache"); 84 MALLOC_DEFINE(M_NEWNFSDCLIENT, "NFSD V4client", "NFSD V4 Client Id"); 85 MALLOC_DEFINE(M_NEWNFSDSTATE, "NFSD V4state", "NFSD V4 State (Openowner, Open, Lockowner, Delegation"); 86 MALLOC_DEFINE(M_NEWNFSDLOCK, "NFSD V4lock", "NFSD V4 byte range lock"); 87 MALLOC_DEFINE(M_NEWNFSDLOCKFILE, "NFSD lckfile", "NFSD Open/Lock file"); 88 MALLOC_DEFINE(M_NEWNFSSTRING, "NFSD string", "NFSD V4 long string"); 89 MALLOC_DEFINE(M_NEWNFSUSERGROUP, "NFSD usrgroup", "NFSD V4 User/group map"); 90 MALLOC_DEFINE(M_NEWNFSDREQ, "NFS req", "NFS request header"); 91 MALLOC_DEFINE(M_NEWNFSFH, "NFS fh", "NFS file handle"); 92 MALLOC_DEFINE(M_NEWNFSCLOWNER, "NFSCL owner", "NFSCL Open Owner"); 93 MALLOC_DEFINE(M_NEWNFSCLOPEN, "NFSCL open", "NFSCL Open"); 94 MALLOC_DEFINE(M_NEWNFSCLDELEG, "NFSCL deleg", "NFSCL Delegation"); 95 MALLOC_DEFINE(M_NEWNFSCLCLIENT, "NFSCL client", "NFSCL Client"); 96 MALLOC_DEFINE(M_NEWNFSCLLOCKOWNER, "NFSCL lckown", "NFSCL Lock Owner"); 97 MALLOC_DEFINE(M_NEWNFSCLLOCK, "NFSCL lck", "NFSCL Lock"); 98 MALLOC_DEFINE(M_NEWNFSV4NODE, "NEWNFSnode", "New nfs vnode"); 99 MALLOC_DEFINE(M_NEWNFSDIRECTIO, "NEWdirectio", "New nfs Direct IO buffer"); 100 MALLOC_DEFINE(M_NEWNFSDIROFF, "Newnfscl_diroff", "New NFS directory offset data"); 101 102 /* 103 * Definition of mutex locks. 104 * newnfsd_mtx is used in nfsrvd_nfsd() to protect the nfs socket list 105 * and assorted other nfsd structures. 106 * Giant is used to protect the nfsd list and count, which is just 107 * updated when nfsd's start/stop and is grabbed for nfsrvd_dorpc() 108 * for the VFS ops. 109 */ 110 struct mtx newnfsd_mtx; 111 struct mtx nfs_sockl_mutex; 112 struct mtx nfs_state_mutex; 113 struct mtx nfs_nameid_mutex; 114 struct mtx nfs_req_mutex; 115 struct mtx nfs_slock_mutex; 116 117 /* local functions */ 118 static int nfssvc_call(struct thread *, struct nfssvc_args *, struct ucred *); 119 120 #if defined(__i386__) 121 /* 122 * These architectures don't need re-alignment, so just return. 123 */ 124 void 125 newnfs_realign(struct mbuf **pm) 126 { 127 128 return; 129 } 130 #else 131 /* 132 * nfs_realign: 133 * 134 * Check for badly aligned mbuf data and realign by copying the unaligned 135 * portion of the data into a new mbuf chain and freeing the portions 136 * of the old chain that were replaced. 137 * 138 * We cannot simply realign the data within the existing mbuf chain 139 * because the underlying buffers may contain other rpc commands and 140 * we cannot afford to overwrite them. 141 * 142 * We would prefer to avoid this situation entirely. The situation does 143 * not occur with NFS/UDP and is supposed to only occassionally occur 144 * with TCP. Use vfs.nfs.realign_count and realign_test to check this. 145 */ 146 void 147 newnfs_realign(struct mbuf **pm) 148 { 149 struct mbuf *m; 150 struct mbuf *n = NULL; 151 int off = 0; 152 153 ++nfs_realign_test; 154 while ((m = *pm) != NULL) { 155 if ((m->m_len & 0x3) || (mtod(m, intptr_t) & 0x3)) { 156 MGET(n, M_WAIT, MT_DATA); 157 if (m->m_len >= MINCLSIZE) { 158 MCLGET(n, M_WAIT); 159 } 160 n->m_len = 0; 161 break; 162 } 163 pm = &m->m_next; 164 } 165 166 /* 167 * If n is non-NULL, loop on m copying data, then replace the 168 * portion of the chain that had to be realigned. 169 */ 170 if (n != NULL) { 171 ++nfs_realign_count; 172 while (m) { 173 m_copyback(n, off, m->m_len, mtod(m, caddr_t)); 174 off += m->m_len; 175 m = m->m_next; 176 } 177 m_freem(*pm); 178 *pm = n; 179 } 180 } 181 #endif /* newnfs_realign */ 182 183 #ifdef notdef 184 static void 185 nfsrv_object_create(struct vnode *vp, struct thread *td) 186 { 187 188 if (vp == NULL || vp->v_type != VREG) 189 return; 190 (void) vfs_object_create(vp, td, td->td_ucred); 191 } 192 #endif 193 194 /* 195 * Look up a file name. Basically just initialize stuff and call namei(). 196 */ 197 int 198 nfsrv_lookupfilename(struct nameidata *ndp, char *fname, NFSPROC_T *p) 199 { 200 int error; 201 202 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, fname, p); 203 error = namei(ndp); 204 if (!error) { 205 NDFREE(ndp, NDF_ONLY_PNBUF); 206 } 207 return (error); 208 } 209 210 /* 211 * Copy NFS uid, gids to the cred structure. 212 */ 213 void 214 newnfs_copycred(struct nfscred *nfscr, struct ucred *cr) 215 { 216 int ngroups, i; 217 218 cr->cr_uid = nfscr->nfsc_uid; 219 ngroups = (nfscr->nfsc_ngroups < NGROUPS) ? 220 nfscr->nfsc_ngroups : NGROUPS; 221 for (i = 0; i < ngroups; i++) 222 cr->cr_groups[i] = nfscr->nfsc_groups[i]; 223 cr->cr_ngroups = ngroups; 224 } 225 226 /* 227 * Map args from nfsmsleep() to msleep(). 228 */ 229 int 230 nfsmsleep(void *chan, void *mutex, int prio, const char *wmesg, 231 struct timespec *ts) 232 { 233 u_int64_t nsecval; 234 int error, timeo; 235 236 if (ts) { 237 timeo = hz * ts->tv_sec; 238 nsecval = (u_int64_t)ts->tv_nsec; 239 nsecval = ((nsecval * ((u_int64_t)hz)) + 500000000) / 240 1000000000; 241 timeo += (int)nsecval; 242 } else { 243 timeo = 0; 244 } 245 error = msleep(chan, (struct mtx *)mutex, prio, wmesg, timeo); 246 return (error); 247 } 248 249 /* 250 * Get the file system info for the server. For now, just assume FFS. 251 */ 252 void 253 nfsvno_getfs(struct nfsfsinfo *sip, int isdgram) 254 { 255 int pref; 256 257 /* 258 * XXX 259 * There should be file system VFS OP(s) to get this information. 260 * For now, assume ufs. 261 */ 262 if (isdgram) 263 pref = NFS_MAXDGRAMDATA; 264 else 265 pref = NFS_MAXDATA; 266 sip->fs_rtmax = NFS_MAXDATA; 267 sip->fs_rtpref = pref; 268 sip->fs_rtmult = NFS_FABLKSIZE; 269 sip->fs_wtmax = NFS_MAXDATA; 270 sip->fs_wtpref = pref; 271 sip->fs_wtmult = NFS_FABLKSIZE; 272 sip->fs_dtpref = pref; 273 sip->fs_maxfilesize = 0xffffffffffffffffull; 274 sip->fs_timedelta.tv_sec = 0; 275 sip->fs_timedelta.tv_nsec = 1; 276 sip->fs_properties = (NFSV3FSINFO_LINK | 277 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 278 NFSV3FSINFO_CANSETTIME); 279 } 280 281 /* Fake nfsrv_atroot. Just return 0 */ 282 int 283 nfsrv_atroot(struct vnode *vp, long *retp) 284 { 285 286 return (0); 287 } 288 289 /* 290 * Set the credentials to refer to root. 291 * If only the various BSDen could agree on whether cr_gid is a separate 292 * field or cr_groups[0]... 293 */ 294 void 295 newnfs_setroot(struct ucred *cred) 296 { 297 298 cred->cr_uid = 0; 299 cred->cr_groups[0] = 0; 300 cred->cr_ngroups = 1; 301 } 302 303 /* 304 * Get the client credential. Used for Renew and recovery. 305 */ 306 struct ucred * 307 newnfs_getcred(void) 308 { 309 struct ucred *cred; 310 struct thread *td = curthread; 311 312 cred = crdup(td->td_ucred); 313 newnfs_setroot(cred); 314 return (cred); 315 } 316 317 /* 318 * Nfs timer routine 319 * Call the nfsd's timer function once/sec. 320 */ 321 void 322 newnfs_timer(void *arg) 323 { 324 static time_t lasttime = 0; 325 /* 326 * Call the server timer, if set up. 327 * The argument indicates if it is the next second and therefore 328 * leases should be checked. 329 */ 330 if (lasttime != NFSD_MONOSEC) { 331 lasttime = NFSD_MONOSEC; 332 if (nfsd_call_servertimer != NULL) 333 (*nfsd_call_servertimer)(); 334 } 335 callout_reset(&newnfsd_callout, nfscl_ticks, newnfs_timer, NULL); 336 } 337 338 339 /* 340 * sleep for a short period of time. 341 * Since lbolt doesn't exist in FreeBSD-CURRENT, just use a timeout on 342 * an event that never gets a wakeup. Only return EINTR or 0. 343 */ 344 int 345 nfs_catnap(int prio, const char *wmesg) 346 { 347 static int non_event; 348 int ret; 349 350 ret = tsleep(&non_event, prio, wmesg, 1); 351 if (ret != EINTR) 352 ret = 0; 353 return (ret); 354 } 355 356 /* 357 * Get referral. For now, just fail. 358 */ 359 struct nfsreferral * 360 nfsv4root_getreferral(struct vnode *vp, struct vnode *dvp, u_int32_t fileno) 361 { 362 363 return (NULL); 364 } 365 366 static int 367 nfssvc_nfscommon(struct thread *td, struct nfssvc_args *uap) 368 { 369 int error; 370 371 error = nfssvc_call(td, uap, td->td_ucred); 372 return (error); 373 } 374 375 static int 376 nfssvc_call(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 377 { 378 int error = EINVAL; 379 struct nfsd_idargs nid; 380 381 if (uap->flag & NFSSVC_IDNAME) { 382 error = copyin(uap->argp, (caddr_t)&nid, sizeof (nid)); 383 if (error) 384 return (error); 385 error = nfssvc_idname(&nid); 386 return (error); 387 } else if (uap->flag & NFSSVC_GETSTATS) { 388 error = copyout(&newnfsstats, 389 CAST_USER_ADDR_T(uap->argp), sizeof (newnfsstats)); 390 return (error); 391 } else if (uap->flag & NFSSVC_NFSUSERDPORT) { 392 u_short sockport; 393 394 error = copyin(uap->argp, (caddr_t)&sockport, 395 sizeof (u_short)); 396 if (!error) 397 error = nfsrv_nfsuserdport(sockport, p); 398 } else if (uap->flag & NFSSVC_NFSUSERDDELPORT) { 399 nfsrv_nfsuserddelport(); 400 error = 0; 401 } 402 return (error); 403 } 404 405 /* 406 * called by all three modevent routines, so that it gets things 407 * initialized soon enough. 408 */ 409 void 410 newnfs_portinit(void) 411 { 412 static int inited = 0; 413 414 if (inited) 415 return; 416 inited = 1; 417 /* Initialize SMP locks used by both client and server. */ 418 mtx_init(&newnfsd_mtx, "newnfsd_mtx", NULL, MTX_DEF); 419 mtx_init(&nfs_state_mutex, "nfs_state_mutex", NULL, MTX_DEF); 420 } 421 422 extern int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *); 423 424 /* 425 * Called once to initialize data structures... 426 */ 427 static int 428 nfscommon_modevent(module_t mod, int type, void *data) 429 { 430 int error = 0; 431 static int loaded = 0; 432 433 switch (type) { 434 case MOD_LOAD: 435 if (loaded) 436 return (0); 437 newnfs_portinit(); 438 mtx_init(&nfs_nameid_mutex, "nfs_nameid_mutex", NULL, MTX_DEF); 439 mtx_init(&nfs_sockl_mutex, "nfs_sockl_mutex", NULL, MTX_DEF); 440 mtx_init(&nfs_slock_mutex, "nfs_slock_mutex", NULL, MTX_DEF); 441 mtx_init(&nfs_req_mutex, "nfs_req_mutex", NULL, MTX_DEF); 442 mtx_init(&nfsrv_nfsuserdsock.nr_mtx, "nfsuserd", NULL, 443 MTX_DEF); 444 callout_init(&newnfsd_callout, CALLOUT_MPSAFE); 445 newnfs_init(); 446 nfsd_call_nfscommon = nfssvc_nfscommon; 447 loaded = 1; 448 break; 449 450 case MOD_UNLOAD: 451 if (newnfs_numnfsd != 0 || nfsrv_nfsuserd != 0 || 452 nfs_numnfscbd != 0) { 453 error = EBUSY; 454 break; 455 } 456 457 nfsd_call_nfscommon = NULL; 458 callout_drain(&newnfsd_callout); 459 /* and get rid of the mutexes */ 460 mtx_destroy(&nfs_nameid_mutex); 461 mtx_destroy(&newnfsd_mtx); 462 mtx_destroy(&nfs_state_mutex); 463 mtx_destroy(&nfs_sockl_mutex); 464 mtx_destroy(&nfs_slock_mutex); 465 mtx_destroy(&nfs_req_mutex); 466 mtx_destroy(&nfsrv_nfsuserdsock.nr_mtx); 467 loaded = 0; 468 break; 469 default: 470 error = EOPNOTSUPP; 471 break; 472 } 473 return error; 474 } 475 static moduledata_t nfscommon_mod = { 476 "nfscommon", 477 nfscommon_modevent, 478 NULL, 479 }; 480 DECLARE_MODULE(nfscommon, nfscommon_mod, SI_SUB_VFS, SI_ORDER_ANY); 481 482 /* So that loader and kldload(2) can find us, wherever we are.. */ 483 MODULE_VERSION(nfscommon, 1); 484 MODULE_DEPEND(nfscommon, nfssvc, 1, 1, 1); 485 MODULE_DEPEND(nfscommon, krpc, 1, 1, 1); 486 487