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 #include "opt_inet6.h" 38 #include "opt_kdtrace.h" 39 40 #include <sys/capability.h> 41 42 /* 43 * generally, I don't like #includes inside .h files, but it seems to 44 * be the easiest way to handle the port. 45 */ 46 #include <sys/hash.h> 47 #include <fs/nfs/nfsport.h> 48 #include <netinet/if_ether.h> 49 #include <net/if_types.h> 50 51 #include <fs/nfsclient/nfs_kdtrace.h> 52 53 #ifdef KDTRACE_HOOKS 54 dtrace_nfsclient_attrcache_flush_probe_func_t 55 dtrace_nfscl_attrcache_flush_done_probe; 56 uint32_t nfscl_attrcache_flush_done_id; 57 58 dtrace_nfsclient_attrcache_get_hit_probe_func_t 59 dtrace_nfscl_attrcache_get_hit_probe; 60 uint32_t nfscl_attrcache_get_hit_id; 61 62 dtrace_nfsclient_attrcache_get_miss_probe_func_t 63 dtrace_nfscl_attrcache_get_miss_probe; 64 uint32_t nfscl_attrcache_get_miss_id; 65 66 dtrace_nfsclient_attrcache_load_probe_func_t 67 dtrace_nfscl_attrcache_load_done_probe; 68 uint32_t nfscl_attrcache_load_done_id; 69 #endif /* !KDTRACE_HOOKS */ 70 71 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 72 extern struct vop_vector newnfs_vnodeops; 73 extern struct vop_vector newnfs_fifoops; 74 extern uma_zone_t newnfsnode_zone; 75 extern struct buf_ops buf_ops_newnfs; 76 extern int ncl_pbuf_freecnt; 77 extern short nfsv4_cbport; 78 extern int nfscl_enablecallb; 79 extern int nfs_numnfscbd; 80 extern int nfscl_inited; 81 struct mtx nfs_clstate_mutex; 82 struct mtx ncl_iod_mutex; 83 NFSDLOCKMUTEX; 84 85 extern void (*ncl_call_invalcaches)(struct vnode *); 86 87 /* 88 * Comparison function for vfs_hash functions. 89 */ 90 int 91 newnfs_vncmpf(struct vnode *vp, void *arg) 92 { 93 struct nfsfh *nfhp = (struct nfsfh *)arg; 94 struct nfsnode *np = VTONFS(vp); 95 96 if (np->n_fhp->nfh_len != nfhp->nfh_len || 97 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 98 return (1); 99 return (0); 100 } 101 102 /* 103 * Look up a vnode/nfsnode by file handle. 104 * Callers must check for mount points!! 105 * In all cases, a pointer to a 106 * nfsnode structure is returned. 107 * This variant takes a "struct nfsfh *" as second argument and uses 108 * that structure up, either by hanging off the nfsnode or FREEing it. 109 */ 110 int 111 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 112 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 113 void *stuff, int lkflags) 114 { 115 struct nfsnode *np, *dnp; 116 struct vnode *vp, *nvp; 117 struct nfsv4node *newd, *oldd; 118 int error; 119 u_int hash; 120 struct nfsmount *nmp; 121 122 nmp = VFSTONFS(mntp); 123 dnp = VTONFS(dvp); 124 *npp = NULL; 125 126 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 127 128 error = vfs_hash_get(mntp, hash, lkflags, 129 td, &nvp, newnfs_vncmpf, nfhp); 130 if (error == 0 && nvp != NULL) { 131 /* 132 * I believe there is a slight chance that vgonel() could 133 * get called on this vnode between when NFSVOPLOCK() drops 134 * the VI_LOCK() and vget() acquires it again, so that it 135 * hasn't yet had v_usecount incremented. If this were to 136 * happen, the VI_DOOMED flag would be set, so check for 137 * that here. Since we now have the v_usecount incremented, 138 * we should be ok until we vrele() it, if the VI_DOOMED 139 * flag isn't set now. 140 */ 141 VI_LOCK(nvp); 142 if ((nvp->v_iflag & VI_DOOMED)) { 143 VI_UNLOCK(nvp); 144 vrele(nvp); 145 error = ENOENT; 146 } else { 147 VI_UNLOCK(nvp); 148 } 149 } 150 if (error) { 151 FREE((caddr_t)nfhp, M_NFSFH); 152 return (error); 153 } 154 if (nvp != NULL) { 155 np = VTONFS(nvp); 156 /* 157 * For NFSv4, check to see if it is the same name and 158 * replace the name, if it is different. 159 */ 160 oldd = newd = NULL; 161 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 162 nvp->v_type == VREG && 163 (np->n_v4->n4_namelen != cnp->cn_namelen || 164 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 165 cnp->cn_namelen) || 166 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 167 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 168 dnp->n_fhp->nfh_len))) { 169 MALLOC(newd, struct nfsv4node *, 170 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 171 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 172 NFSLOCKNODE(np); 173 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG 174 && (np->n_v4->n4_namelen != cnp->cn_namelen || 175 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 176 cnp->cn_namelen) || 177 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 178 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 179 dnp->n_fhp->nfh_len))) { 180 oldd = np->n_v4; 181 np->n_v4 = newd; 182 newd = NULL; 183 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 184 np->n_v4->n4_namelen = cnp->cn_namelen; 185 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 186 dnp->n_fhp->nfh_len); 187 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 188 cnp->cn_namelen); 189 } 190 NFSUNLOCKNODE(np); 191 } 192 if (newd != NULL) 193 FREE((caddr_t)newd, M_NFSV4NODE); 194 if (oldd != NULL) 195 FREE((caddr_t)oldd, M_NFSV4NODE); 196 *npp = np; 197 FREE((caddr_t)nfhp, M_NFSFH); 198 return (0); 199 } 200 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 201 202 error = getnewvnode("newnfs", mntp, &newnfs_vnodeops, &nvp); 203 if (error) { 204 uma_zfree(newnfsnode_zone, np); 205 FREE((caddr_t)nfhp, M_NFSFH); 206 return (error); 207 } 208 vp = nvp; 209 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 210 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 211 vp->v_data = np; 212 np->n_vnode = vp; 213 /* 214 * Initialize the mutex even if the vnode is going to be a loser. 215 * This simplifies the logic in reclaim, which can then unconditionally 216 * destroy the mutex (in the case of the loser, or if hash_insert 217 * happened to return an error no special casing is needed). 218 */ 219 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 220 221 /* 222 * Are we getting the root? If so, make sure the vnode flags 223 * are correct 224 */ 225 if ((nfhp->nfh_len == nmp->nm_fhsize) && 226 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 227 if (vp->v_type == VNON) 228 vp->v_type = VDIR; 229 vp->v_vflag |= VV_ROOT; 230 } 231 232 np->n_fhp = nfhp; 233 /* 234 * For NFSv4, we have to attach the directory file handle and 235 * file name, so that Open Ops can be done later. 236 */ 237 if (nmp->nm_flag & NFSMNT_NFSV4) { 238 MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node) 239 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 240 M_WAITOK); 241 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 242 np->n_v4->n4_namelen = cnp->cn_namelen; 243 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 244 dnp->n_fhp->nfh_len); 245 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 246 cnp->cn_namelen); 247 } else { 248 np->n_v4 = NULL; 249 } 250 251 /* 252 * NFS supports recursive and shared locking. 253 */ 254 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 255 VN_LOCK_AREC(vp); 256 VN_LOCK_ASHARE(vp); 257 error = insmntque(vp, mntp); 258 if (error != 0) { 259 *npp = NULL; 260 mtx_destroy(&np->n_mtx); 261 FREE((caddr_t)nfhp, M_NFSFH); 262 if (np->n_v4 != NULL) 263 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 264 uma_zfree(newnfsnode_zone, np); 265 return (error); 266 } 267 error = vfs_hash_insert(vp, hash, lkflags, 268 td, &nvp, newnfs_vncmpf, nfhp); 269 if (error) 270 return (error); 271 if (nvp != NULL) { 272 *npp = VTONFS(nvp); 273 /* vfs_hash_insert() vput()'s the losing vnode */ 274 return (0); 275 } 276 *npp = np; 277 278 return (0); 279 } 280 281 /* 282 * Anothe variant of nfs_nget(). This one is only used by reopen. It 283 * takes almost the same args as nfs_nget(), but only succeeds if an entry 284 * exists in the cache. (Since files should already be "open" with a 285 * vnode ref cnt on the node when reopen calls this, it should always 286 * succeed.) 287 * Also, don't get a vnode lock, since it may already be locked by some 288 * other process that is handling it. This is ok, since all other threads 289 * on the client are blocked by the nfsc_lock being exclusively held by the 290 * caller of this function. 291 */ 292 int 293 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 294 struct thread *td, struct nfsnode **npp) 295 { 296 struct vnode *nvp; 297 u_int hash; 298 struct nfsfh *nfhp; 299 int error; 300 301 *npp = NULL; 302 /* For forced dismounts, just return error. */ 303 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 304 return (EINTR); 305 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 306 M_NFSFH, M_WAITOK); 307 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 308 nfhp->nfh_len = fhsize; 309 310 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 311 312 /* 313 * First, try to get the vnode locked, but don't block for the lock. 314 */ 315 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 316 newnfs_vncmpf, nfhp); 317 if (error == 0 && nvp != NULL) { 318 NFSVOPUNLOCK(nvp, 0); 319 } else if (error == EBUSY) { 320 /* 321 * The LK_EXCLOTHER lock type tells nfs_lock1() to not try 322 * and lock the vnode, but just get a v_usecount on it. 323 * LK_NOWAIT is set so that when vget() returns ENOENT, 324 * vfs_hash_get() fails instead of looping. 325 * If this succeeds, it is safe so long as a vflush() with 326 * FORCECLOSE has not been done. Since the Renew thread is 327 * stopped and the MNTK_UNMOUNTF flag is set before doing 328 * a vflush() with FORCECLOSE, we should be ok here. 329 */ 330 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 331 error = EINTR; 332 else 333 error = vfs_hash_get(mntp, hash, 334 (LK_EXCLOTHER | LK_NOWAIT), td, &nvp, 335 newnfs_vncmpf, nfhp); 336 } 337 FREE(nfhp, M_NFSFH); 338 if (error) 339 return (error); 340 if (nvp != NULL) { 341 *npp = VTONFS(nvp); 342 return (0); 343 } 344 return (EINVAL); 345 } 346 347 /* 348 * Load the attribute cache (that lives in the nfsnode entry) with 349 * the attributes of the second argument and 350 * Iff vaper not NULL 351 * copy the attributes to *vaper 352 * Similar to nfs_loadattrcache(), except the attributes are passed in 353 * instead of being parsed out of the mbuf list. 354 */ 355 int 356 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 357 void *stuff, int writeattr, int dontshrink) 358 { 359 struct vnode *vp = *vpp; 360 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 361 struct nfsnode *np; 362 struct nfsmount *nmp; 363 struct timespec mtime_save; 364 u_quad_t nsize; 365 int setnsize; 366 367 /* 368 * If v_type == VNON it is a new node, so fill in the v_type, 369 * n_mtime fields. Check to see if it represents a special 370 * device, and if so, check for a possible alias. Once the 371 * correct vnode has been obtained, fill in the rest of the 372 * information. 373 */ 374 np = VTONFS(vp); 375 NFSLOCKNODE(np); 376 if (vp->v_type != nvap->va_type) { 377 vp->v_type = nvap->va_type; 378 if (vp->v_type == VFIFO) 379 vp->v_op = &newnfs_fifoops; 380 np->n_mtime = nvap->va_mtime; 381 } 382 nmp = VFSTONFS(vp->v_mount); 383 vap = &np->n_vattr.na_vattr; 384 mtime_save = vap->va_mtime; 385 if (writeattr) { 386 np->n_vattr.na_filerev = nap->na_filerev; 387 np->n_vattr.na_size = nap->na_size; 388 np->n_vattr.na_mtime = nap->na_mtime; 389 np->n_vattr.na_ctime = nap->na_ctime; 390 np->n_vattr.na_fsid = nap->na_fsid; 391 np->n_vattr.na_mode = nap->na_mode; 392 } else { 393 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 394 sizeof (struct nfsvattr)); 395 } 396 397 /* 398 * For NFSv4, if the node's fsid is not equal to the mount point's 399 * fsid, return the low order 32bits of the node's fsid. This 400 * allows getcwd(3) to work. There is a chance that the fsid might 401 * be the same as a local fs, but since this is in an NFS mount 402 * point, I don't think that will cause any problems? 403 */ 404 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 405 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 406 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 407 /* 408 * va_fsid needs to be set to some value derived from 409 * np->n_vattr.na_filesid that is not equal 410 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes 411 * from the value used for the top level server volume 412 * in the mounted subtree. 413 */ 414 if (vp->v_mount->mnt_stat.f_fsid.val[0] != 415 (uint32_t)np->n_vattr.na_filesid[0]) 416 vap->va_fsid = (uint32_t)np->n_vattr.na_filesid[0]; 417 else 418 vap->va_fsid = (uint32_t)hash32_buf( 419 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0); 420 } else 421 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 422 np->n_attrstamp = time_second; 423 setnsize = 0; 424 nsize = 0; 425 if (vap->va_size != np->n_size) { 426 if (vap->va_type == VREG) { 427 if (dontshrink && vap->va_size < np->n_size) { 428 /* 429 * We've been told not to shrink the file; 430 * zero np->n_attrstamp to indicate that 431 * the attributes are stale. 432 */ 433 vap->va_size = np->n_size; 434 np->n_attrstamp = 0; 435 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 436 vnode_pager_setsize(vp, np->n_size); 437 } else if (np->n_flag & NMODIFIED) { 438 /* 439 * We've modified the file: Use the larger 440 * of our size, and the server's size. 441 */ 442 if (vap->va_size < np->n_size) { 443 vap->va_size = np->n_size; 444 } else { 445 np->n_size = vap->va_size; 446 np->n_flag |= NSIZECHANGED; 447 } 448 vnode_pager_setsize(vp, np->n_size); 449 } else if (vap->va_size < np->n_size) { 450 /* 451 * When shrinking the size, the call to 452 * vnode_pager_setsize() cannot be done 453 * with the mutex held, so delay it until 454 * after the mtx_unlock call. 455 */ 456 nsize = np->n_size = vap->va_size; 457 np->n_flag |= NSIZECHANGED; 458 setnsize = 1; 459 } else { 460 np->n_size = vap->va_size; 461 np->n_flag |= NSIZECHANGED; 462 vnode_pager_setsize(vp, np->n_size); 463 } 464 } else { 465 np->n_size = vap->va_size; 466 } 467 } 468 /* 469 * The following checks are added to prevent a race between (say) 470 * a READDIR+ and a WRITE. 471 * READDIR+, WRITE requests sent out. 472 * READDIR+ resp, WRITE resp received on client. 473 * However, the WRITE resp was handled before the READDIR+ resp 474 * causing the post op attrs from the write to be loaded first 475 * and the attrs from the READDIR+ to be loaded later. If this 476 * happens, we have stale attrs loaded into the attrcache. 477 * We detect this by for the mtime moving back. We invalidate the 478 * attrcache when this happens. 479 */ 480 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 481 /* Size changed or mtime went backwards */ 482 np->n_attrstamp = 0; 483 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 484 } 485 if (vaper != NULL) { 486 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 487 if (np->n_flag & NCHG) { 488 if (np->n_flag & NACC) 489 vaper->va_atime = np->n_atim; 490 if (np->n_flag & NUPD) 491 vaper->va_mtime = np->n_mtim; 492 } 493 } 494 #ifdef KDTRACE_HOOKS 495 if (np->n_attrstamp != 0) 496 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, 0); 497 #endif 498 NFSUNLOCKNODE(np); 499 if (setnsize) 500 vnode_pager_setsize(vp, nsize); 501 return (0); 502 } 503 504 /* 505 * Fill in the client id name. For these bytes: 506 * 1 - they must be unique 507 * 2 - they should be persistent across client reboots 508 * 1 is more critical than 2 509 * Use the mount point's unique id plus either the uuid or, if that 510 * isn't set, random junk. 511 */ 512 void 513 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 514 { 515 int uuidlen; 516 517 /* 518 * First, put in the 64bit mount point identifier. 519 */ 520 if (idlen >= sizeof (u_int64_t)) { 521 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 522 cp += sizeof (u_int64_t); 523 idlen -= sizeof (u_int64_t); 524 } 525 526 /* 527 * If uuid is non-zero length, use it. 528 */ 529 uuidlen = strlen(uuid); 530 if (uuidlen > 0 && idlen >= uuidlen) { 531 NFSBCOPY(uuid, cp, uuidlen); 532 cp += uuidlen; 533 idlen -= uuidlen; 534 } 535 536 /* 537 * This only normally happens if the uuid isn't set. 538 */ 539 while (idlen > 0) { 540 *cp++ = (u_int8_t)(arc4random() % 256); 541 idlen--; 542 } 543 } 544 545 /* 546 * Fill in a lock owner name. For now, pid + the process's creation time. 547 */ 548 void 549 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 550 { 551 union { 552 u_int32_t lval; 553 u_int8_t cval[4]; 554 } tl; 555 struct proc *p; 556 557 if (id == NULL) { 558 printf("NULL id\n"); 559 bzero(cp, NFSV4CL_LOCKNAMELEN); 560 return; 561 } 562 if ((flags & F_POSIX) != 0) { 563 p = (struct proc *)id; 564 tl.lval = p->p_pid; 565 *cp++ = tl.cval[0]; 566 *cp++ = tl.cval[1]; 567 *cp++ = tl.cval[2]; 568 *cp++ = tl.cval[3]; 569 tl.lval = p->p_stats->p_start.tv_sec; 570 *cp++ = tl.cval[0]; 571 *cp++ = tl.cval[1]; 572 *cp++ = tl.cval[2]; 573 *cp++ = tl.cval[3]; 574 tl.lval = p->p_stats->p_start.tv_usec; 575 *cp++ = tl.cval[0]; 576 *cp++ = tl.cval[1]; 577 *cp++ = tl.cval[2]; 578 *cp = tl.cval[3]; 579 } else if ((flags & F_FLOCK) != 0) { 580 bcopy(&id, cp, sizeof(id)); 581 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 582 } else { 583 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 584 bzero(cp, NFSV4CL_LOCKNAMELEN); 585 } 586 } 587 588 /* 589 * Find the parent process for the thread passed in as an argument. 590 * If none exists, return NULL, otherwise return a thread for the parent. 591 * (Can be any of the threads, since it is only used for td->td_proc.) 592 */ 593 NFSPROC_T * 594 nfscl_getparent(struct thread *td) 595 { 596 struct proc *p; 597 struct thread *ptd; 598 599 if (td == NULL) 600 return (NULL); 601 p = td->td_proc; 602 if (p->p_pid == 0) 603 return (NULL); 604 p = p->p_pptr; 605 if (p == NULL) 606 return (NULL); 607 ptd = TAILQ_FIRST(&p->p_threads); 608 return (ptd); 609 } 610 611 /* 612 * Start up the renew kernel thread. 613 */ 614 static void 615 start_nfscl(void *arg) 616 { 617 struct nfsclclient *clp; 618 struct thread *td; 619 620 clp = (struct nfsclclient *)arg; 621 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 622 nfscl_renewthread(clp, td); 623 kproc_exit(0); 624 } 625 626 void 627 nfscl_start_renewthread(struct nfsclclient *clp) 628 { 629 630 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 631 "nfscl"); 632 } 633 634 /* 635 * Handle wcc_data. 636 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 637 * as the first Op after PutFH. 638 * (For NFSv4, the postop attributes are after the Op, so they can't be 639 * parsed here. A separate call to nfscl_postop_attr() is required.) 640 */ 641 int 642 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 643 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 644 { 645 u_int32_t *tl; 646 struct nfsnode *np = VTONFS(vp); 647 struct nfsvattr nfsva; 648 int error = 0; 649 650 if (wccflagp != NULL) 651 *wccflagp = 0; 652 if (nd->nd_flag & ND_NFSV3) { 653 *flagp = 0; 654 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 655 if (*tl == newnfs_true) { 656 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 657 if (wccflagp != NULL) { 658 mtx_lock(&np->n_mtx); 659 *wccflagp = (np->n_mtime.tv_sec == 660 fxdr_unsigned(u_int32_t, *(tl + 2)) && 661 np->n_mtime.tv_nsec == 662 fxdr_unsigned(u_int32_t, *(tl + 3))); 663 mtx_unlock(&np->n_mtx); 664 } 665 } 666 error = nfscl_postop_attr(nd, nap, flagp, stuff); 667 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 668 == (ND_NFSV4 | ND_V4WCCATTR)) { 669 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 670 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 671 NULL, NULL, NULL, NULL, NULL); 672 if (error) 673 return (error); 674 /* 675 * Get rid of Op# and status for next op. 676 */ 677 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 678 if (*++tl) 679 nd->nd_flag |= ND_NOMOREDATA; 680 if (wccflagp != NULL && 681 nfsva.na_vattr.va_mtime.tv_sec != 0) { 682 mtx_lock(&np->n_mtx); 683 *wccflagp = (np->n_mtime.tv_sec == 684 nfsva.na_vattr.va_mtime.tv_sec && 685 np->n_mtime.tv_nsec == 686 nfsva.na_vattr.va_mtime.tv_sec); 687 mtx_unlock(&np->n_mtx); 688 } 689 } 690 nfsmout: 691 return (error); 692 } 693 694 /* 695 * Get postop attributes. 696 */ 697 int 698 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 699 void *stuff) 700 { 701 u_int32_t *tl; 702 int error = 0; 703 704 *retp = 0; 705 if (nd->nd_flag & ND_NOMOREDATA) 706 return (error); 707 if (nd->nd_flag & ND_NFSV3) { 708 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 709 *retp = fxdr_unsigned(int, *tl); 710 } else if (nd->nd_flag & ND_NFSV4) { 711 /* 712 * For NFSv4, the postop attr are at the end, so no point 713 * in looking if nd_repstat != 0. 714 */ 715 if (!nd->nd_repstat) { 716 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 717 if (*(tl + 1)) 718 /* should never happen since nd_repstat != 0 */ 719 nd->nd_flag |= ND_NOMOREDATA; 720 else 721 *retp = 1; 722 } 723 } else if (!nd->nd_repstat) { 724 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 725 *retp = 1; 726 } 727 if (*retp) { 728 error = nfsm_loadattr(nd, nap); 729 if (error) 730 *retp = 0; 731 } 732 nfsmout: 733 return (error); 734 } 735 736 /* 737 * Fill in the setable attributes. The full argument indicates whether 738 * to fill in them all or just mode and time. 739 */ 740 void 741 nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap, 742 struct vnode *vp, int flags, u_int32_t rdev) 743 { 744 u_int32_t *tl; 745 struct nfsv2_sattr *sp; 746 nfsattrbit_t attrbits; 747 748 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 749 case ND_NFSV2: 750 NFSM_BUILD(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 751 if (vap->va_mode == (mode_t)VNOVAL) 752 sp->sa_mode = newnfs_xdrneg1; 753 else 754 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 755 if (vap->va_uid == (uid_t)VNOVAL) 756 sp->sa_uid = newnfs_xdrneg1; 757 else 758 sp->sa_uid = txdr_unsigned(vap->va_uid); 759 if (vap->va_gid == (gid_t)VNOVAL) 760 sp->sa_gid = newnfs_xdrneg1; 761 else 762 sp->sa_gid = txdr_unsigned(vap->va_gid); 763 if (flags & NFSSATTR_SIZE0) 764 sp->sa_size = 0; 765 else if (flags & NFSSATTR_SIZENEG1) 766 sp->sa_size = newnfs_xdrneg1; 767 else if (flags & NFSSATTR_SIZERDEV) 768 sp->sa_size = txdr_unsigned(rdev); 769 else 770 sp->sa_size = txdr_unsigned(vap->va_size); 771 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 772 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 773 break; 774 case ND_NFSV3: 775 if (vap->va_mode != (mode_t)VNOVAL) { 776 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 777 *tl++ = newnfs_true; 778 *tl = txdr_unsigned(vap->va_mode); 779 } else { 780 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 781 *tl = newnfs_false; 782 } 783 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) { 784 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 785 *tl++ = newnfs_true; 786 *tl = txdr_unsigned(vap->va_uid); 787 } else { 788 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 789 *tl = newnfs_false; 790 } 791 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) { 792 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 793 *tl++ = newnfs_true; 794 *tl = txdr_unsigned(vap->va_gid); 795 } else { 796 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 797 *tl = newnfs_false; 798 } 799 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) { 800 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 801 *tl++ = newnfs_true; 802 txdr_hyper(vap->va_size, tl); 803 } else { 804 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 805 *tl = newnfs_false; 806 } 807 if (vap->va_atime.tv_sec != VNOVAL) { 808 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 809 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 810 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 811 txdr_nfsv3time(&vap->va_atime, tl); 812 } else { 813 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 814 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 815 } 816 } else { 817 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 818 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 819 } 820 if (vap->va_mtime.tv_sec != VNOVAL) { 821 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 822 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 823 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 824 txdr_nfsv3time(&vap->va_mtime, tl); 825 } else { 826 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 827 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 828 } 829 } else { 830 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 831 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 832 } 833 break; 834 case ND_NFSV4: 835 NFSZERO_ATTRBIT(&attrbits); 836 if (vap->va_mode != (mode_t)VNOVAL) 837 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_MODE); 838 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) 839 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER); 840 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) 841 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP); 842 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) 843 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 844 if (vap->va_atime.tv_sec != VNOVAL) 845 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET); 846 if (vap->va_mtime.tv_sec != VNOVAL) 847 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET); 848 (void) nfsv4_fillattr(nd, vp->v_mount, vp, NULL, vap, NULL, 0, 849 &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0); 850 break; 851 }; 852 } 853 854 /* 855 * nfscl_request() - mostly a wrapper for newnfs_request(). 856 */ 857 int 858 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 859 struct ucred *cred, void *stuff) 860 { 861 int ret, vers; 862 struct nfsmount *nmp; 863 864 nmp = VFSTONFS(vp->v_mount); 865 if (nd->nd_flag & ND_NFSV4) 866 vers = NFS_VER4; 867 else if (nd->nd_flag & ND_NFSV3) 868 vers = NFS_VER3; 869 else 870 vers = NFS_VER2; 871 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 872 NFS_PROG, vers, NULL, 1, NULL, NULL); 873 return (ret); 874 } 875 876 /* 877 * fill in this bsden's variant of statfs using nfsstatfs. 878 */ 879 void 880 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 881 { 882 struct statfs *sbp = (struct statfs *)statfs; 883 884 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 885 sbp->f_bsize = NFS_FABLKSIZE; 886 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 887 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 888 /* 889 * Although sf_abytes is uint64_t and f_bavail is int64_t, 890 * the value after dividing by NFS_FABLKSIZE is small 891 * enough that it will fit in 63bits, so it is ok to 892 * assign it to f_bavail without fear that it will become 893 * negative. 894 */ 895 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 896 sbp->f_files = sfp->sf_tfiles; 897 /* Since f_ffree is int64_t, clip it to 63bits. */ 898 if (sfp->sf_ffiles > INT64_MAX) 899 sbp->f_ffree = INT64_MAX; 900 else 901 sbp->f_ffree = sfp->sf_ffiles; 902 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 903 /* 904 * The type casts to (int32_t) ensure that this code is 905 * compatible with the old NFS client, in that it will 906 * propagate bit31 to the high order bits. This may or may 907 * not be correct for NFSv2, but since it is a legacy 908 * environment, I'd rather retain backwards compatibility. 909 */ 910 sbp->f_bsize = (int32_t)sfp->sf_bsize; 911 sbp->f_blocks = (int32_t)sfp->sf_blocks; 912 sbp->f_bfree = (int32_t)sfp->sf_bfree; 913 sbp->f_bavail = (int32_t)sfp->sf_bavail; 914 sbp->f_files = 0; 915 sbp->f_ffree = 0; 916 } 917 } 918 919 /* 920 * Use the fsinfo stuff to update the mount point. 921 */ 922 void 923 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 924 { 925 926 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 927 fsp->fs_wtpref >= NFS_FABLKSIZE) 928 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 929 ~(NFS_FABLKSIZE - 1); 930 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 931 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 932 if (nmp->nm_wsize == 0) 933 nmp->nm_wsize = fsp->fs_wtmax; 934 } 935 if (nmp->nm_wsize < NFS_FABLKSIZE) 936 nmp->nm_wsize = NFS_FABLKSIZE; 937 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 938 fsp->fs_rtpref >= NFS_FABLKSIZE) 939 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 940 ~(NFS_FABLKSIZE - 1); 941 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 942 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 943 if (nmp->nm_rsize == 0) 944 nmp->nm_rsize = fsp->fs_rtmax; 945 } 946 if (nmp->nm_rsize < NFS_FABLKSIZE) 947 nmp->nm_rsize = NFS_FABLKSIZE; 948 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 949 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 950 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 951 ~(NFS_DIRBLKSIZ - 1); 952 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 953 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 954 if (nmp->nm_readdirsize == 0) 955 nmp->nm_readdirsize = fsp->fs_rtmax; 956 } 957 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 958 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 959 if (fsp->fs_maxfilesize > 0 && 960 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 961 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 962 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 963 nmp->nm_state |= NFSSTA_GOTFSINFO; 964 } 965 966 /* 967 * Get a pointer to my IP addrress and return it. 968 * Return NULL if you can't find one. 969 */ 970 u_int8_t * 971 nfscl_getmyip(struct nfsmount *nmp, int *isinet6p) 972 { 973 struct sockaddr_in sad, *sin; 974 struct rtentry *rt; 975 u_int8_t *retp = NULL; 976 static struct in_addr laddr; 977 978 *isinet6p = 0; 979 /* 980 * Loop up a route for the destination address. 981 */ 982 if (nmp->nm_nam->sa_family == AF_INET) { 983 bzero(&sad, sizeof (sad)); 984 sin = (struct sockaddr_in *)nmp->nm_nam; 985 sad.sin_family = AF_INET; 986 sad.sin_len = sizeof (struct sockaddr_in); 987 sad.sin_addr.s_addr = sin->sin_addr.s_addr; 988 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 989 rt = rtalloc1_fib((struct sockaddr *)&sad, 0, 0UL, 990 curthread->td_proc->p_fibnum); 991 if (rt != NULL) { 992 if (rt->rt_ifp != NULL && 993 rt->rt_ifa != NULL && 994 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) && 995 rt->rt_ifa->ifa_addr->sa_family == AF_INET) { 996 sin = (struct sockaddr_in *) 997 rt->rt_ifa->ifa_addr; 998 laddr.s_addr = sin->sin_addr.s_addr; 999 retp = (u_int8_t *)&laddr; 1000 } 1001 RTFREE_LOCKED(rt); 1002 } 1003 CURVNET_RESTORE(); 1004 #ifdef INET6 1005 } else if (nmp->nm_nam->sa_family == AF_INET6) { 1006 struct sockaddr_in6 sad6, *sin6; 1007 static struct in6_addr laddr6; 1008 1009 bzero(&sad6, sizeof (sad6)); 1010 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1011 sad6.sin6_family = AF_INET6; 1012 sad6.sin6_len = sizeof (struct sockaddr_in6); 1013 sad6.sin6_addr = sin6->sin6_addr; 1014 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1015 rt = rtalloc1_fib((struct sockaddr *)&sad6, 0, 0UL, 1016 curthread->td_proc->p_fibnum); 1017 if (rt != NULL) { 1018 if (rt->rt_ifp != NULL && 1019 rt->rt_ifa != NULL && 1020 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) && 1021 rt->rt_ifa->ifa_addr->sa_family == AF_INET6) { 1022 sin6 = (struct sockaddr_in6 *) 1023 rt->rt_ifa->ifa_addr; 1024 laddr6 = sin6->sin6_addr; 1025 retp = (u_int8_t *)&laddr6; 1026 *isinet6p = 1; 1027 } 1028 RTFREE_LOCKED(rt); 1029 } 1030 CURVNET_RESTORE(); 1031 #endif 1032 } 1033 return (retp); 1034 } 1035 1036 /* 1037 * Copy NFS uid, gids from the cred structure. 1038 */ 1039 void 1040 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1041 { 1042 int i; 1043 1044 KASSERT(cr->cr_ngroups >= 0, 1045 ("newnfs_copyincred: negative cr_ngroups")); 1046 nfscr->nfsc_uid = cr->cr_uid; 1047 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1048 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1049 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1050 } 1051 1052 1053 /* 1054 * Do any client specific initialization. 1055 */ 1056 void 1057 nfscl_init(void) 1058 { 1059 static int inited = 0; 1060 1061 if (inited) 1062 return; 1063 inited = 1; 1064 nfscl_inited = 1; 1065 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1066 } 1067 1068 /* 1069 * Check each of the attributes to be set, to ensure they aren't already 1070 * the correct value. Disable setting ones already correct. 1071 */ 1072 int 1073 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1074 { 1075 1076 if (vap->va_mode != (mode_t)VNOVAL) { 1077 if (vap->va_mode == nvap->na_mode) 1078 vap->va_mode = (mode_t)VNOVAL; 1079 } 1080 if (vap->va_uid != (uid_t)VNOVAL) { 1081 if (vap->va_uid == nvap->na_uid) 1082 vap->va_uid = (uid_t)VNOVAL; 1083 } 1084 if (vap->va_gid != (gid_t)VNOVAL) { 1085 if (vap->va_gid == nvap->na_gid) 1086 vap->va_gid = (gid_t)VNOVAL; 1087 } 1088 if (vap->va_size != VNOVAL) { 1089 if (vap->va_size == nvap->na_size) 1090 vap->va_size = VNOVAL; 1091 } 1092 1093 /* 1094 * We are normally called with only a partially initialized 1095 * VAP. Since the NFSv3 spec says that server may use the 1096 * file attributes to store the verifier, the spec requires 1097 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1098 * in atime, but we can't really assume that all servers will 1099 * so we ensure that our SETATTR sets both atime and mtime. 1100 */ 1101 if (vap->va_mtime.tv_sec == VNOVAL) 1102 vfs_timestamp(&vap->va_mtime); 1103 if (vap->va_atime.tv_sec == VNOVAL) 1104 vap->va_atime = vap->va_mtime; 1105 return (1); 1106 } 1107 1108 /* 1109 * Map nfsv4 errors to errno.h errors. 1110 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1111 * error should only be returned for the Open, Create and Setattr Ops. 1112 * As such, most calls can just pass in 0 for those arguments. 1113 */ 1114 APPLESTATIC int 1115 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1116 { 1117 struct proc *p; 1118 1119 if (error < 10000) 1120 return (error); 1121 if (td != NULL) 1122 p = td->td_proc; 1123 else 1124 p = NULL; 1125 switch (error) { 1126 case NFSERR_BADOWNER: 1127 tprintf(p, LOG_INFO, 1128 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1129 uid, gid); 1130 return (EPERM); 1131 case NFSERR_BADNAME: 1132 case NFSERR_BADCHAR: 1133 printf("nfsv4 char/name not handled by server\n"); 1134 return (ENOENT); 1135 case NFSERR_STALECLIENTID: 1136 case NFSERR_STALESTATEID: 1137 case NFSERR_EXPIRED: 1138 case NFSERR_BADSTATEID: 1139 case NFSERR_BADSESSION: 1140 printf("nfsv4 recover err returned %d\n", error); 1141 return (EIO); 1142 case NFSERR_BADHANDLE: 1143 case NFSERR_SERVERFAULT: 1144 case NFSERR_BADTYPE: 1145 case NFSERR_FHEXPIRED: 1146 case NFSERR_RESOURCE: 1147 case NFSERR_MOVED: 1148 case NFSERR_NOFILEHANDLE: 1149 case NFSERR_MINORVERMISMATCH: 1150 case NFSERR_OLDSTATEID: 1151 case NFSERR_BADSEQID: 1152 case NFSERR_LEASEMOVED: 1153 case NFSERR_RECLAIMBAD: 1154 case NFSERR_BADXDR: 1155 case NFSERR_OPILLEGAL: 1156 printf("nfsv4 client/server protocol prob err=%d\n", 1157 error); 1158 return (EIO); 1159 default: 1160 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1161 return (EIO); 1162 }; 1163 } 1164 1165 /* 1166 * Check to see if the process for this owner exists. Return 1 if it doesn't 1167 * and 0 otherwise. 1168 */ 1169 int 1170 nfscl_procdoesntexist(u_int8_t *own) 1171 { 1172 union { 1173 u_int32_t lval; 1174 u_int8_t cval[4]; 1175 } tl; 1176 struct proc *p; 1177 pid_t pid; 1178 int ret = 0; 1179 1180 tl.cval[0] = *own++; 1181 tl.cval[1] = *own++; 1182 tl.cval[2] = *own++; 1183 tl.cval[3] = *own++; 1184 pid = tl.lval; 1185 p = pfind_locked(pid); 1186 if (p == NULL) 1187 return (1); 1188 if (p->p_stats == NULL) { 1189 PROC_UNLOCK(p); 1190 return (0); 1191 } 1192 tl.cval[0] = *own++; 1193 tl.cval[1] = *own++; 1194 tl.cval[2] = *own++; 1195 tl.cval[3] = *own++; 1196 if (tl.lval != p->p_stats->p_start.tv_sec) { 1197 ret = 1; 1198 } else { 1199 tl.cval[0] = *own++; 1200 tl.cval[1] = *own++; 1201 tl.cval[2] = *own++; 1202 tl.cval[3] = *own; 1203 if (tl.lval != p->p_stats->p_start.tv_usec) 1204 ret = 1; 1205 } 1206 PROC_UNLOCK(p); 1207 return (ret); 1208 } 1209 1210 /* 1211 * - nfs pseudo system call for the client 1212 */ 1213 /* 1214 * MPSAFE 1215 */ 1216 static int 1217 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1218 { 1219 struct file *fp; 1220 struct nfscbd_args nfscbdarg; 1221 struct nfsd_nfscbd_args nfscbdarg2; 1222 int error; 1223 struct nameidata nd; 1224 struct nfscl_dumpmntopts dumpmntopts; 1225 char *buf; 1226 1227 if (uap->flag & NFSSVC_CBADDSOCK) { 1228 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1229 if (error) 1230 return (error); 1231 /* 1232 * Since we don't know what rights might be required, 1233 * pretend that we need them all. It is better to be too 1234 * careful than too reckless. 1235 */ 1236 if ((error = fget(td, nfscbdarg.sock, CAP_SOCK_CLIENT, &fp)) 1237 != 0) { 1238 return (error); 1239 } 1240 if (fp->f_type != DTYPE_SOCKET) { 1241 fdrop(fp, td); 1242 return (EPERM); 1243 } 1244 error = nfscbd_addsock(fp); 1245 fdrop(fp, td); 1246 if (!error && nfscl_enablecallb == 0) { 1247 nfsv4_cbport = nfscbdarg.port; 1248 nfscl_enablecallb = 1; 1249 } 1250 } else if (uap->flag & NFSSVC_NFSCBD) { 1251 if (uap->argp == NULL) 1252 return (EINVAL); 1253 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1254 sizeof(nfscbdarg2)); 1255 if (error) 1256 return (error); 1257 error = nfscbd_nfsd(td, &nfscbdarg2); 1258 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1259 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1260 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1261 dumpmntopts.ndmnt_blen > 1024)) 1262 error = EINVAL; 1263 if (error == 0) 1264 error = nfsrv_lookupfilename(&nd, 1265 dumpmntopts.ndmnt_fname, td); 1266 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1267 "nfs") != 0) { 1268 vput(nd.ni_vp); 1269 error = EINVAL; 1270 } 1271 if (error == 0) { 1272 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1273 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1274 dumpmntopts.ndmnt_blen); 1275 vput(nd.ni_vp); 1276 error = copyout(buf, dumpmntopts.ndmnt_buf, 1277 dumpmntopts.ndmnt_blen); 1278 free(buf, M_TEMP); 1279 } 1280 } else { 1281 error = EINVAL; 1282 } 1283 return (error); 1284 } 1285 1286 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1287 1288 /* 1289 * Called once to initialize data structures... 1290 */ 1291 static int 1292 nfscl_modevent(module_t mod, int type, void *data) 1293 { 1294 int error = 0; 1295 static int loaded = 0; 1296 1297 switch (type) { 1298 case MOD_LOAD: 1299 if (loaded) 1300 return (0); 1301 newnfs_portinit(); 1302 mtx_init(&nfs_clstate_mutex, "nfs_clstate_mutex", NULL, 1303 MTX_DEF); 1304 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1305 nfscl_init(); 1306 NFSD_LOCK(); 1307 nfsrvd_cbinit(0); 1308 NFSD_UNLOCK(); 1309 ncl_call_invalcaches = ncl_invalcaches; 1310 nfsd_call_nfscl = nfssvc_nfscl; 1311 loaded = 1; 1312 break; 1313 1314 case MOD_UNLOAD: 1315 if (nfs_numnfscbd != 0) { 1316 error = EBUSY; 1317 break; 1318 } 1319 1320 /* 1321 * XXX: Unloading of nfscl module is unsupported. 1322 */ 1323 #if 0 1324 ncl_call_invalcaches = NULL; 1325 nfsd_call_nfscl = NULL; 1326 /* and get rid of the mutexes */ 1327 mtx_destroy(&nfs_clstate_mutex); 1328 mtx_destroy(&ncl_iod_mutex); 1329 loaded = 0; 1330 break; 1331 #else 1332 /* FALLTHROUGH */ 1333 #endif 1334 default: 1335 error = EOPNOTSUPP; 1336 break; 1337 } 1338 return error; 1339 } 1340 static moduledata_t nfscl_mod = { 1341 "nfscl", 1342 nfscl_modevent, 1343 NULL, 1344 }; 1345 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1346 1347 /* So that loader and kldload(2) can find us, wherever we are.. */ 1348 MODULE_VERSION(nfscl, 1); 1349 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1350 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1351 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1352 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1353 1354