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sys/fs/nfsclient/nfs_clport.c
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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: releng/11.1/sys/fs/nfsclient/nfs_clport.c 317520 2017-04-27 20:14:54Z rmacklem $"); 36 37 #include "opt_inet.h" 38 #include "opt_inet6.h" 39 40 #include <sys/capsicum.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/fail.h> 47 #include <sys/hash.h> 48 #include <sys/sysctl.h> 49 #include <fs/nfs/nfsport.h> 50 #include <netinet/in_fib.h> 51 #include <netinet/if_ether.h> 52 #include <netinet6/ip6_var.h> 53 #include <net/if_types.h> 54 55 #include <fs/nfsclient/nfs_kdtrace.h> 56 57 #ifdef KDTRACE_HOOKS 58 dtrace_nfsclient_attrcache_flush_probe_func_t 59 dtrace_nfscl_attrcache_flush_done_probe; 60 uint32_t nfscl_attrcache_flush_done_id; 61 62 dtrace_nfsclient_attrcache_get_hit_probe_func_t 63 dtrace_nfscl_attrcache_get_hit_probe; 64 uint32_t nfscl_attrcache_get_hit_id; 65 66 dtrace_nfsclient_attrcache_get_miss_probe_func_t 67 dtrace_nfscl_attrcache_get_miss_probe; 68 uint32_t nfscl_attrcache_get_miss_id; 69 70 dtrace_nfsclient_attrcache_load_probe_func_t 71 dtrace_nfscl_attrcache_load_done_probe; 72 uint32_t nfscl_attrcache_load_done_id; 73 #endif /* !KDTRACE_HOOKS */ 74 75 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 76 extern struct vop_vector newnfs_vnodeops; 77 extern struct vop_vector newnfs_fifoops; 78 extern uma_zone_t newnfsnode_zone; 79 extern struct buf_ops buf_ops_newnfs; 80 extern int ncl_pbuf_freecnt; 81 extern short nfsv4_cbport; 82 extern int nfscl_enablecallb; 83 extern int nfs_numnfscbd; 84 extern int nfscl_inited; 85 struct mtx ncl_iod_mutex; 86 NFSDLOCKMUTEX; 87 88 extern void (*ncl_call_invalcaches)(struct vnode *); 89 90 SYSCTL_DECL(_vfs_nfs); 91 static int ncl_fileid_maxwarnings = 10; 92 SYSCTL_INT(_vfs_nfs, OID_AUTO, fileid_maxwarnings, CTLFLAG_RWTUN, 93 &ncl_fileid_maxwarnings, 0, 94 "Limit fileid corruption warnings; 0 is off; -1 is unlimited"); 95 static volatile int ncl_fileid_nwarnings; 96 97 static void nfscl_warn_fileid(struct nfsmount *, struct nfsvattr *, 98 struct nfsvattr *); 99 100 /* 101 * Comparison function for vfs_hash functions. 102 */ 103 int 104 newnfs_vncmpf(struct vnode *vp, void *arg) 105 { 106 struct nfsfh *nfhp = (struct nfsfh *)arg; 107 struct nfsnode *np = VTONFS(vp); 108 109 if (np->n_fhp->nfh_len != nfhp->nfh_len || 110 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 111 return (1); 112 return (0); 113 } 114 115 /* 116 * Look up a vnode/nfsnode by file handle. 117 * Callers must check for mount points!! 118 * In all cases, a pointer to a 119 * nfsnode structure is returned. 120 * This variant takes a "struct nfsfh *" as second argument and uses 121 * that structure up, either by hanging off the nfsnode or FREEing it. 122 */ 123 int 124 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 125 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 126 void *stuff, int lkflags) 127 { 128 struct nfsnode *np, *dnp; 129 struct vnode *vp, *nvp; 130 struct nfsv4node *newd, *oldd; 131 int error; 132 u_int hash; 133 struct nfsmount *nmp; 134 135 nmp = VFSTONFS(mntp); 136 dnp = VTONFS(dvp); 137 *npp = NULL; 138 139 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 140 141 error = vfs_hash_get(mntp, hash, lkflags, 142 td, &nvp, newnfs_vncmpf, nfhp); 143 if (error == 0 && nvp != NULL) { 144 /* 145 * I believe there is a slight chance that vgonel() could 146 * get called on this vnode between when NFSVOPLOCK() drops 147 * the VI_LOCK() and vget() acquires it again, so that it 148 * hasn't yet had v_usecount incremented. If this were to 149 * happen, the VI_DOOMED flag would be set, so check for 150 * that here. Since we now have the v_usecount incremented, 151 * we should be ok until we vrele() it, if the VI_DOOMED 152 * flag isn't set now. 153 */ 154 VI_LOCK(nvp); 155 if ((nvp->v_iflag & VI_DOOMED)) { 156 VI_UNLOCK(nvp); 157 vrele(nvp); 158 error = ENOENT; 159 } else { 160 VI_UNLOCK(nvp); 161 } 162 } 163 if (error) { 164 FREE((caddr_t)nfhp, M_NFSFH); 165 return (error); 166 } 167 if (nvp != NULL) { 168 np = VTONFS(nvp); 169 /* 170 * For NFSv4, check to see if it is the same name and 171 * replace the name, if it is different. 172 */ 173 oldd = newd = NULL; 174 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 175 nvp->v_type == VREG && 176 (np->n_v4->n4_namelen != cnp->cn_namelen || 177 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 178 cnp->cn_namelen) || 179 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 180 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 181 dnp->n_fhp->nfh_len))) { 182 MALLOC(newd, struct nfsv4node *, 183 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 184 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 185 NFSLOCKNODE(np); 186 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG 187 && (np->n_v4->n4_namelen != cnp->cn_namelen || 188 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 189 cnp->cn_namelen) || 190 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 191 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 192 dnp->n_fhp->nfh_len))) { 193 oldd = np->n_v4; 194 np->n_v4 = newd; 195 newd = NULL; 196 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 197 np->n_v4->n4_namelen = cnp->cn_namelen; 198 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 199 dnp->n_fhp->nfh_len); 200 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 201 cnp->cn_namelen); 202 } 203 NFSUNLOCKNODE(np); 204 } 205 if (newd != NULL) 206 FREE((caddr_t)newd, M_NFSV4NODE); 207 if (oldd != NULL) 208 FREE((caddr_t)oldd, M_NFSV4NODE); 209 *npp = np; 210 FREE((caddr_t)nfhp, M_NFSFH); 211 return (0); 212 } 213 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 214 215 error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp); 216 if (error) { 217 uma_zfree(newnfsnode_zone, np); 218 FREE((caddr_t)nfhp, M_NFSFH); 219 return (error); 220 } 221 vp = nvp; 222 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 223 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 224 vp->v_data = np; 225 np->n_vnode = vp; 226 /* 227 * Initialize the mutex even if the vnode is going to be a loser. 228 * This simplifies the logic in reclaim, which can then unconditionally 229 * destroy the mutex (in the case of the loser, or if hash_insert 230 * happened to return an error no special casing is needed). 231 */ 232 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 233 234 /* 235 * Are we getting the root? If so, make sure the vnode flags 236 * are correct 237 */ 238 if ((nfhp->nfh_len == nmp->nm_fhsize) && 239 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 240 if (vp->v_type == VNON) 241 vp->v_type = VDIR; 242 vp->v_vflag |= VV_ROOT; 243 } 244 245 np->n_fhp = nfhp; 246 /* 247 * For NFSv4, we have to attach the directory file handle and 248 * file name, so that Open Ops can be done later. 249 */ 250 if (nmp->nm_flag & NFSMNT_NFSV4) { 251 MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node) 252 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 253 M_WAITOK); 254 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 255 np->n_v4->n4_namelen = cnp->cn_namelen; 256 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 257 dnp->n_fhp->nfh_len); 258 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 259 cnp->cn_namelen); 260 } else { 261 np->n_v4 = NULL; 262 } 263 264 /* 265 * NFS supports recursive and shared locking. 266 */ 267 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 268 VN_LOCK_AREC(vp); 269 VN_LOCK_ASHARE(vp); 270 error = insmntque(vp, mntp); 271 if (error != 0) { 272 *npp = NULL; 273 mtx_destroy(&np->n_mtx); 274 FREE((caddr_t)nfhp, M_NFSFH); 275 if (np->n_v4 != NULL) 276 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 277 uma_zfree(newnfsnode_zone, np); 278 return (error); 279 } 280 error = vfs_hash_insert(vp, hash, lkflags, 281 td, &nvp, newnfs_vncmpf, nfhp); 282 if (error) 283 return (error); 284 if (nvp != NULL) { 285 *npp = VTONFS(nvp); 286 /* vfs_hash_insert() vput()'s the losing vnode */ 287 return (0); 288 } 289 *npp = np; 290 291 return (0); 292 } 293 294 /* 295 * Another variant of nfs_nget(). This one is only used by reopen. It 296 * takes almost the same args as nfs_nget(), but only succeeds if an entry 297 * exists in the cache. (Since files should already be "open" with a 298 * vnode ref cnt on the node when reopen calls this, it should always 299 * succeed.) 300 * Also, don't get a vnode lock, since it may already be locked by some 301 * other process that is handling it. This is ok, since all other threads 302 * on the client are blocked by the nfsc_lock being exclusively held by the 303 * caller of this function. 304 */ 305 int 306 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 307 struct thread *td, struct nfsnode **npp) 308 { 309 struct vnode *nvp; 310 u_int hash; 311 struct nfsfh *nfhp; 312 int error; 313 314 *npp = NULL; 315 /* For forced dismounts, just return error. */ 316 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 317 return (EINTR); 318 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 319 M_NFSFH, M_WAITOK); 320 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 321 nfhp->nfh_len = fhsize; 322 323 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 324 325 /* 326 * First, try to get the vnode locked, but don't block for the lock. 327 */ 328 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 329 newnfs_vncmpf, nfhp); 330 if (error == 0 && nvp != NULL) { 331 NFSVOPUNLOCK(nvp, 0); 332 } else if (error == EBUSY) { 333 /* 334 * It is safe so long as a vflush() with 335 * FORCECLOSE has not been done. Since the Renew thread is 336 * stopped and the MNTK_UNMOUNTF flag is set before doing 337 * a vflush() with FORCECLOSE, we should be ok here. 338 */ 339 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 340 error = EINTR; 341 else { 342 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp); 343 if (nvp == NULL) { 344 error = ENOENT; 345 } else if ((nvp->v_iflag & VI_DOOMED) != 0) { 346 error = ENOENT; 347 vrele(nvp); 348 } else { 349 error = 0; 350 } 351 } 352 } 353 FREE(nfhp, M_NFSFH); 354 if (error) 355 return (error); 356 if (nvp != NULL) { 357 *npp = VTONFS(nvp); 358 return (0); 359 } 360 return (EINVAL); 361 } 362 363 static void 364 nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap, 365 struct nfsvattr *newnap) 366 { 367 int off; 368 369 if (ncl_fileid_maxwarnings >= 0 && 370 ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 371 return; 372 off = 0; 373 if (ncl_fileid_maxwarnings >= 0) { 374 if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 375 off = 1; 376 } 377 378 printf("newnfs: server '%s' error: fileid changed. " 379 "fsid %jx:%jx: expected fileid %#jx, got %#jx. " 380 "(BROKEN NFS SERVER OR MIDDLEWARE)\n", 381 nmp->nm_com.nmcom_hostname, 382 (uintmax_t)nmp->nm_fsid[0], 383 (uintmax_t)nmp->nm_fsid[1], 384 (uintmax_t)oldnap->na_fileid, 385 (uintmax_t)newnap->na_fileid); 386 387 if (off) 388 printf("newnfs: Logged %d times about fileid corruption; " 389 "going quiet to avoid spamming logs excessively. (Limit " 390 "is: %d).\n", ncl_fileid_nwarnings, 391 ncl_fileid_maxwarnings); 392 } 393 394 /* 395 * Load the attribute cache (that lives in the nfsnode entry) with 396 * the attributes of the second argument and 397 * Iff vaper not NULL 398 * copy the attributes to *vaper 399 * Similar to nfs_loadattrcache(), except the attributes are passed in 400 * instead of being parsed out of the mbuf list. 401 */ 402 int 403 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 404 void *stuff, int writeattr, int dontshrink) 405 { 406 struct vnode *vp = *vpp; 407 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 408 struct nfsnode *np; 409 struct nfsmount *nmp; 410 struct timespec mtime_save; 411 u_quad_t nsize; 412 int setnsize, error, force_fid_err; 413 414 error = 0; 415 setnsize = 0; 416 nsize = 0; 417 418 /* 419 * If v_type == VNON it is a new node, so fill in the v_type, 420 * n_mtime fields. Check to see if it represents a special 421 * device, and if so, check for a possible alias. Once the 422 * correct vnode has been obtained, fill in the rest of the 423 * information. 424 */ 425 np = VTONFS(vp); 426 NFSLOCKNODE(np); 427 if (vp->v_type != nvap->va_type) { 428 vp->v_type = nvap->va_type; 429 if (vp->v_type == VFIFO) 430 vp->v_op = &newnfs_fifoops; 431 np->n_mtime = nvap->va_mtime; 432 } 433 nmp = VFSTONFS(vp->v_mount); 434 vap = &np->n_vattr.na_vattr; 435 mtime_save = vap->va_mtime; 436 if (writeattr) { 437 np->n_vattr.na_filerev = nap->na_filerev; 438 np->n_vattr.na_size = nap->na_size; 439 np->n_vattr.na_mtime = nap->na_mtime; 440 np->n_vattr.na_ctime = nap->na_ctime; 441 np->n_vattr.na_fsid = nap->na_fsid; 442 np->n_vattr.na_mode = nap->na_mode; 443 } else { 444 force_fid_err = 0; 445 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning, 446 force_fid_err); 447 /* 448 * BROKEN NFS SERVER OR MIDDLEWARE 449 * 450 * Certain NFS servers (certain old proprietary filers ca. 451 * 2006) or broken middleboxes (e.g. WAN accelerator products) 452 * will respond to GETATTR requests with results for a 453 * different fileid. 454 * 455 * The WAN accelerator we've observed not only serves stale 456 * cache results for a given file, it also occasionally serves 457 * results for wholly different files. This causes surprising 458 * problems; for example the cached size attribute of a file 459 * may truncate down and then back up, resulting in zero 460 * regions in file contents read by applications. We observed 461 * this reliably with Clang and .c files during parallel build. 462 * A pcap revealed packet fragmentation and GETATTR RPC 463 * responses with wholly wrong fileids. 464 */ 465 if ((np->n_vattr.na_fileid != 0 && 466 np->n_vattr.na_fileid != nap->na_fileid) || 467 force_fid_err) { 468 nfscl_warn_fileid(nmp, &np->n_vattr, nap); 469 error = EIDRM; 470 goto out; 471 } 472 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 473 sizeof (struct nfsvattr)); 474 } 475 476 /* 477 * For NFSv4, if the node's fsid is not equal to the mount point's 478 * fsid, return the low order 32bits of the node's fsid. This 479 * allows getcwd(3) to work. There is a chance that the fsid might 480 * be the same as a local fs, but since this is in an NFS mount 481 * point, I don't think that will cause any problems? 482 */ 483 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 484 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 485 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 486 /* 487 * va_fsid needs to be set to some value derived from 488 * np->n_vattr.na_filesid that is not equal 489 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes 490 * from the value used for the top level server volume 491 * in the mounted subtree. 492 */ 493 if (vp->v_mount->mnt_stat.f_fsid.val[0] != 494 (uint32_t)np->n_vattr.na_filesid[0]) 495 vap->va_fsid = (uint32_t)np->n_vattr.na_filesid[0]; 496 else 497 vap->va_fsid = (uint32_t)hash32_buf( 498 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0); 499 } else 500 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 501 np->n_attrstamp = time_second; 502 if (vap->va_size != np->n_size) { 503 if (vap->va_type == VREG) { 504 if (dontshrink && vap->va_size < np->n_size) { 505 /* 506 * We've been told not to shrink the file; 507 * zero np->n_attrstamp to indicate that 508 * the attributes are stale. 509 */ 510 vap->va_size = np->n_size; 511 np->n_attrstamp = 0; 512 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 513 vnode_pager_setsize(vp, np->n_size); 514 } else if (np->n_flag & NMODIFIED) { 515 /* 516 * We've modified the file: Use the larger 517 * of our size, and the server's size. 518 */ 519 if (vap->va_size < np->n_size) { 520 vap->va_size = np->n_size; 521 } else { 522 np->n_size = vap->va_size; 523 np->n_flag |= NSIZECHANGED; 524 } 525 vnode_pager_setsize(vp, np->n_size); 526 } else if (vap->va_size < np->n_size) { 527 /* 528 * When shrinking the size, the call to 529 * vnode_pager_setsize() cannot be done 530 * with the mutex held, so delay it until 531 * after the mtx_unlock call. 532 */ 533 nsize = np->n_size = vap->va_size; 534 np->n_flag |= NSIZECHANGED; 535 setnsize = 1; 536 } else { 537 np->n_size = vap->va_size; 538 np->n_flag |= NSIZECHANGED; 539 vnode_pager_setsize(vp, np->n_size); 540 } 541 } else { 542 np->n_size = vap->va_size; 543 } 544 } 545 /* 546 * The following checks are added to prevent a race between (say) 547 * a READDIR+ and a WRITE. 548 * READDIR+, WRITE requests sent out. 549 * READDIR+ resp, WRITE resp received on client. 550 * However, the WRITE resp was handled before the READDIR+ resp 551 * causing the post op attrs from the write to be loaded first 552 * and the attrs from the READDIR+ to be loaded later. If this 553 * happens, we have stale attrs loaded into the attrcache. 554 * We detect this by for the mtime moving back. We invalidate the 555 * attrcache when this happens. 556 */ 557 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 558 /* Size changed or mtime went backwards */ 559 np->n_attrstamp = 0; 560 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 561 } 562 if (vaper != NULL) { 563 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 564 if (np->n_flag & NCHG) { 565 if (np->n_flag & NACC) 566 vaper->va_atime = np->n_atim; 567 if (np->n_flag & NUPD) 568 vaper->va_mtime = np->n_mtim; 569 } 570 } 571 572 out: 573 #ifdef KDTRACE_HOOKS 574 if (np->n_attrstamp != 0) 575 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 576 #endif 577 NFSUNLOCKNODE(np); 578 if (setnsize) 579 vnode_pager_setsize(vp, nsize); 580 return (error); 581 } 582 583 /* 584 * Fill in the client id name. For these bytes: 585 * 1 - they must be unique 586 * 2 - they should be persistent across client reboots 587 * 1 is more critical than 2 588 * Use the mount point's unique id plus either the uuid or, if that 589 * isn't set, random junk. 590 */ 591 void 592 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 593 { 594 int uuidlen; 595 596 /* 597 * First, put in the 64bit mount point identifier. 598 */ 599 if (idlen >= sizeof (u_int64_t)) { 600 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 601 cp += sizeof (u_int64_t); 602 idlen -= sizeof (u_int64_t); 603 } 604 605 /* 606 * If uuid is non-zero length, use it. 607 */ 608 uuidlen = strlen(uuid); 609 if (uuidlen > 0 && idlen >= uuidlen) { 610 NFSBCOPY(uuid, cp, uuidlen); 611 cp += uuidlen; 612 idlen -= uuidlen; 613 } 614 615 /* 616 * This only normally happens if the uuid isn't set. 617 */ 618 while (idlen > 0) { 619 *cp++ = (u_int8_t)(arc4random() % 256); 620 idlen--; 621 } 622 } 623 624 /* 625 * Fill in a lock owner name. For now, pid + the process's creation time. 626 */ 627 void 628 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 629 { 630 union { 631 u_int32_t lval; 632 u_int8_t cval[4]; 633 } tl; 634 struct proc *p; 635 636 if (id == NULL) { 637 /* Return the single open_owner of all 0 bytes. */ 638 bzero(cp, NFSV4CL_LOCKNAMELEN); 639 return; 640 } 641 if ((flags & F_POSIX) != 0) { 642 p = (struct proc *)id; 643 tl.lval = p->p_pid; 644 *cp++ = tl.cval[0]; 645 *cp++ = tl.cval[1]; 646 *cp++ = tl.cval[2]; 647 *cp++ = tl.cval[3]; 648 tl.lval = p->p_stats->p_start.tv_sec; 649 *cp++ = tl.cval[0]; 650 *cp++ = tl.cval[1]; 651 *cp++ = tl.cval[2]; 652 *cp++ = tl.cval[3]; 653 tl.lval = p->p_stats->p_start.tv_usec; 654 *cp++ = tl.cval[0]; 655 *cp++ = tl.cval[1]; 656 *cp++ = tl.cval[2]; 657 *cp = tl.cval[3]; 658 } else if ((flags & F_FLOCK) != 0) { 659 bcopy(&id, cp, sizeof(id)); 660 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 661 } else { 662 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 663 bzero(cp, NFSV4CL_LOCKNAMELEN); 664 } 665 } 666 667 /* 668 * Find the parent process for the thread passed in as an argument. 669 * If none exists, return NULL, otherwise return a thread for the parent. 670 * (Can be any of the threads, since it is only used for td->td_proc.) 671 */ 672 NFSPROC_T * 673 nfscl_getparent(struct thread *td) 674 { 675 struct proc *p; 676 struct thread *ptd; 677 678 if (td == NULL) 679 return (NULL); 680 p = td->td_proc; 681 if (p->p_pid == 0) 682 return (NULL); 683 p = p->p_pptr; 684 if (p == NULL) 685 return (NULL); 686 ptd = TAILQ_FIRST(&p->p_threads); 687 return (ptd); 688 } 689 690 /* 691 * Start up the renew kernel thread. 692 */ 693 static void 694 start_nfscl(void *arg) 695 { 696 struct nfsclclient *clp; 697 struct thread *td; 698 699 clp = (struct nfsclclient *)arg; 700 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 701 nfscl_renewthread(clp, td); 702 kproc_exit(0); 703 } 704 705 void 706 nfscl_start_renewthread(struct nfsclclient *clp) 707 { 708 709 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 710 "nfscl"); 711 } 712 713 /* 714 * Handle wcc_data. 715 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 716 * as the first Op after PutFH. 717 * (For NFSv4, the postop attributes are after the Op, so they can't be 718 * parsed here. A separate call to nfscl_postop_attr() is required.) 719 */ 720 int 721 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 722 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 723 { 724 u_int32_t *tl; 725 struct nfsnode *np = VTONFS(vp); 726 struct nfsvattr nfsva; 727 int error = 0; 728 729 if (wccflagp != NULL) 730 *wccflagp = 0; 731 if (nd->nd_flag & ND_NFSV3) { 732 *flagp = 0; 733 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 734 if (*tl == newnfs_true) { 735 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 736 if (wccflagp != NULL) { 737 mtx_lock(&np->n_mtx); 738 *wccflagp = (np->n_mtime.tv_sec == 739 fxdr_unsigned(u_int32_t, *(tl + 2)) && 740 np->n_mtime.tv_nsec == 741 fxdr_unsigned(u_int32_t, *(tl + 3))); 742 mtx_unlock(&np->n_mtx); 743 } 744 } 745 error = nfscl_postop_attr(nd, nap, flagp, stuff); 746 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 747 == (ND_NFSV4 | ND_V4WCCATTR)) { 748 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 749 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 750 NULL, NULL, NULL, NULL, NULL); 751 if (error) 752 return (error); 753 /* 754 * Get rid of Op# and status for next op. 755 */ 756 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 757 if (*++tl) 758 nd->nd_flag |= ND_NOMOREDATA; 759 if (wccflagp != NULL && 760 nfsva.na_vattr.va_mtime.tv_sec != 0) { 761 mtx_lock(&np->n_mtx); 762 *wccflagp = (np->n_mtime.tv_sec == 763 nfsva.na_vattr.va_mtime.tv_sec && 764 np->n_mtime.tv_nsec == 765 nfsva.na_vattr.va_mtime.tv_sec); 766 mtx_unlock(&np->n_mtx); 767 } 768 } 769 nfsmout: 770 return (error); 771 } 772 773 /* 774 * Get postop attributes. 775 */ 776 int 777 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 778 void *stuff) 779 { 780 u_int32_t *tl; 781 int error = 0; 782 783 *retp = 0; 784 if (nd->nd_flag & ND_NOMOREDATA) 785 return (error); 786 if (nd->nd_flag & ND_NFSV3) { 787 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 788 *retp = fxdr_unsigned(int, *tl); 789 } else if (nd->nd_flag & ND_NFSV4) { 790 /* 791 * For NFSv4, the postop attr are at the end, so no point 792 * in looking if nd_repstat != 0. 793 */ 794 if (!nd->nd_repstat) { 795 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 796 if (*(tl + 1)) 797 /* should never happen since nd_repstat != 0 */ 798 nd->nd_flag |= ND_NOMOREDATA; 799 else 800 *retp = 1; 801 } 802 } else if (!nd->nd_repstat) { 803 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 804 *retp = 1; 805 } 806 if (*retp) { 807 error = nfsm_loadattr(nd, nap); 808 if (error) 809 *retp = 0; 810 } 811 nfsmout: 812 return (error); 813 } 814 815 /* 816 * Fill in the setable attributes. The full argument indicates whether 817 * to fill in them all or just mode and time. 818 */ 819 void 820 nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap, 821 struct vnode *vp, int flags, u_int32_t rdev) 822 { 823 u_int32_t *tl; 824 struct nfsv2_sattr *sp; 825 nfsattrbit_t attrbits; 826 827 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 828 case ND_NFSV2: 829 NFSM_BUILD(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 830 if (vap->va_mode == (mode_t)VNOVAL) 831 sp->sa_mode = newnfs_xdrneg1; 832 else 833 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 834 if (vap->va_uid == (uid_t)VNOVAL) 835 sp->sa_uid = newnfs_xdrneg1; 836 else 837 sp->sa_uid = txdr_unsigned(vap->va_uid); 838 if (vap->va_gid == (gid_t)VNOVAL) 839 sp->sa_gid = newnfs_xdrneg1; 840 else 841 sp->sa_gid = txdr_unsigned(vap->va_gid); 842 if (flags & NFSSATTR_SIZE0) 843 sp->sa_size = 0; 844 else if (flags & NFSSATTR_SIZENEG1) 845 sp->sa_size = newnfs_xdrneg1; 846 else if (flags & NFSSATTR_SIZERDEV) 847 sp->sa_size = txdr_unsigned(rdev); 848 else 849 sp->sa_size = txdr_unsigned(vap->va_size); 850 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 851 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 852 break; 853 case ND_NFSV3: 854 if (vap->va_mode != (mode_t)VNOVAL) { 855 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 856 *tl++ = newnfs_true; 857 *tl = txdr_unsigned(vap->va_mode); 858 } else { 859 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 860 *tl = newnfs_false; 861 } 862 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) { 863 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 864 *tl++ = newnfs_true; 865 *tl = txdr_unsigned(vap->va_uid); 866 } else { 867 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 868 *tl = newnfs_false; 869 } 870 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) { 871 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 872 *tl++ = newnfs_true; 873 *tl = txdr_unsigned(vap->va_gid); 874 } else { 875 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 876 *tl = newnfs_false; 877 } 878 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) { 879 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 880 *tl++ = newnfs_true; 881 txdr_hyper(vap->va_size, tl); 882 } else { 883 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 884 *tl = newnfs_false; 885 } 886 if (vap->va_atime.tv_sec != VNOVAL) { 887 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 888 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 889 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 890 txdr_nfsv3time(&vap->va_atime, tl); 891 } else { 892 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 893 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 894 } 895 } else { 896 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 897 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 898 } 899 if (vap->va_mtime.tv_sec != VNOVAL) { 900 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 901 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 902 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 903 txdr_nfsv3time(&vap->va_mtime, tl); 904 } else { 905 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 906 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 907 } 908 } else { 909 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 910 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 911 } 912 break; 913 case ND_NFSV4: 914 NFSZERO_ATTRBIT(&attrbits); 915 if (vap->va_mode != (mode_t)VNOVAL) 916 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_MODE); 917 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) 918 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER); 919 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) 920 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP); 921 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) 922 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 923 if (vap->va_atime.tv_sec != VNOVAL) 924 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET); 925 if (vap->va_mtime.tv_sec != VNOVAL) 926 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET); 927 (void) nfsv4_fillattr(nd, vp->v_mount, vp, NULL, vap, NULL, 0, 928 &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0); 929 break; 930 } 931 } 932 933 /* 934 * nfscl_request() - mostly a wrapper for newnfs_request(). 935 */ 936 int 937 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 938 struct ucred *cred, void *stuff) 939 { 940 int ret, vers; 941 struct nfsmount *nmp; 942 943 nmp = VFSTONFS(vp->v_mount); 944 if (nd->nd_flag & ND_NFSV4) 945 vers = NFS_VER4; 946 else if (nd->nd_flag & ND_NFSV3) 947 vers = NFS_VER3; 948 else 949 vers = NFS_VER2; 950 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 951 NFS_PROG, vers, NULL, 1, NULL, NULL); 952 return (ret); 953 } 954 955 /* 956 * fill in this bsden's variant of statfs using nfsstatfs. 957 */ 958 void 959 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 960 { 961 struct statfs *sbp = (struct statfs *)statfs; 962 963 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 964 sbp->f_bsize = NFS_FABLKSIZE; 965 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 966 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 967 /* 968 * Although sf_abytes is uint64_t and f_bavail is int64_t, 969 * the value after dividing by NFS_FABLKSIZE is small 970 * enough that it will fit in 63bits, so it is ok to 971 * assign it to f_bavail without fear that it will become 972 * negative. 973 */ 974 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 975 sbp->f_files = sfp->sf_tfiles; 976 /* Since f_ffree is int64_t, clip it to 63bits. */ 977 if (sfp->sf_ffiles > INT64_MAX) 978 sbp->f_ffree = INT64_MAX; 979 else 980 sbp->f_ffree = sfp->sf_ffiles; 981 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 982 /* 983 * The type casts to (int32_t) ensure that this code is 984 * compatible with the old NFS client, in that it will 985 * propagate bit31 to the high order bits. This may or may 986 * not be correct for NFSv2, but since it is a legacy 987 * environment, I'd rather retain backwards compatibility. 988 */ 989 sbp->f_bsize = (int32_t)sfp->sf_bsize; 990 sbp->f_blocks = (int32_t)sfp->sf_blocks; 991 sbp->f_bfree = (int32_t)sfp->sf_bfree; 992 sbp->f_bavail = (int32_t)sfp->sf_bavail; 993 sbp->f_files = 0; 994 sbp->f_ffree = 0; 995 } 996 } 997 998 /* 999 * Use the fsinfo stuff to update the mount point. 1000 */ 1001 void 1002 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 1003 { 1004 1005 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 1006 fsp->fs_wtpref >= NFS_FABLKSIZE) 1007 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 1008 ~(NFS_FABLKSIZE - 1); 1009 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 1010 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 1011 if (nmp->nm_wsize == 0) 1012 nmp->nm_wsize = fsp->fs_wtmax; 1013 } 1014 if (nmp->nm_wsize < NFS_FABLKSIZE) 1015 nmp->nm_wsize = NFS_FABLKSIZE; 1016 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 1017 fsp->fs_rtpref >= NFS_FABLKSIZE) 1018 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 1019 ~(NFS_FABLKSIZE - 1); 1020 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 1021 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 1022 if (nmp->nm_rsize == 0) 1023 nmp->nm_rsize = fsp->fs_rtmax; 1024 } 1025 if (nmp->nm_rsize < NFS_FABLKSIZE) 1026 nmp->nm_rsize = NFS_FABLKSIZE; 1027 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 1028 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 1029 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 1030 ~(NFS_DIRBLKSIZ - 1); 1031 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 1032 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 1033 if (nmp->nm_readdirsize == 0) 1034 nmp->nm_readdirsize = fsp->fs_rtmax; 1035 } 1036 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 1037 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 1038 if (fsp->fs_maxfilesize > 0 && 1039 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 1040 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 1041 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 1042 nmp->nm_state |= NFSSTA_GOTFSINFO; 1043 } 1044 1045 /* 1046 * Lookups source address which should be used to communicate with 1047 * @nmp and stores it inside @pdst. 1048 * 1049 * Returns 0 on success. 1050 */ 1051 u_int8_t * 1052 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 1053 { 1054 #if defined(INET6) || defined(INET) 1055 int error, fibnum; 1056 1057 fibnum = curthread->td_proc->p_fibnum; 1058 #endif 1059 #ifdef INET 1060 if (nmp->nm_nam->sa_family == AF_INET) { 1061 struct sockaddr_in *sin; 1062 struct nhop4_extended nh_ext; 1063 1064 sin = (struct sockaddr_in *)nmp->nm_nam; 1065 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1066 error = fib4_lookup_nh_ext(fibnum, sin->sin_addr, 0, 0, 1067 &nh_ext); 1068 CURVNET_RESTORE(); 1069 if (error != 0) 1070 return (NULL); 1071 1072 if ((ntohl(nh_ext.nh_src.s_addr) >> IN_CLASSA_NSHIFT) == 1073 IN_LOOPBACKNET) { 1074 /* Ignore loopback addresses */ 1075 return (NULL); 1076 } 1077 1078 *isinet6p = 0; 1079 *((struct in_addr *)paddr) = nh_ext.nh_src; 1080 1081 return (u_int8_t *)paddr; 1082 } 1083 #endif 1084 #ifdef INET6 1085 if (nmp->nm_nam->sa_family == AF_INET6) { 1086 struct sockaddr_in6 *sin6; 1087 1088 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1089 1090 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1091 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 1092 sin6->sin6_scope_id, NULL, paddr, NULL); 1093 CURVNET_RESTORE(); 1094 if (error != 0) 1095 return (NULL); 1096 1097 if (IN6_IS_ADDR_LOOPBACK(paddr)) 1098 return (NULL); 1099 1100 /* Scope is embedded in */ 1101 *isinet6p = 1; 1102 1103 return (u_int8_t *)paddr; 1104 } 1105 #endif 1106 return (NULL); 1107 } 1108 1109 /* 1110 * Copy NFS uid, gids from the cred structure. 1111 */ 1112 void 1113 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1114 { 1115 int i; 1116 1117 KASSERT(cr->cr_ngroups >= 0, 1118 ("newnfs_copyincred: negative cr_ngroups")); 1119 nfscr->nfsc_uid = cr->cr_uid; 1120 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1121 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1122 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1123 } 1124 1125 1126 /* 1127 * Do any client specific initialization. 1128 */ 1129 void 1130 nfscl_init(void) 1131 { 1132 static int inited = 0; 1133 1134 if (inited) 1135 return; 1136 inited = 1; 1137 nfscl_inited = 1; 1138 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1139 } 1140 1141 /* 1142 * Check each of the attributes to be set, to ensure they aren't already 1143 * the correct value. Disable setting ones already correct. 1144 */ 1145 int 1146 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1147 { 1148 1149 if (vap->va_mode != (mode_t)VNOVAL) { 1150 if (vap->va_mode == nvap->na_mode) 1151 vap->va_mode = (mode_t)VNOVAL; 1152 } 1153 if (vap->va_uid != (uid_t)VNOVAL) { 1154 if (vap->va_uid == nvap->na_uid) 1155 vap->va_uid = (uid_t)VNOVAL; 1156 } 1157 if (vap->va_gid != (gid_t)VNOVAL) { 1158 if (vap->va_gid == nvap->na_gid) 1159 vap->va_gid = (gid_t)VNOVAL; 1160 } 1161 if (vap->va_size != VNOVAL) { 1162 if (vap->va_size == nvap->na_size) 1163 vap->va_size = VNOVAL; 1164 } 1165 1166 /* 1167 * We are normally called with only a partially initialized 1168 * VAP. Since the NFSv3 spec says that server may use the 1169 * file attributes to store the verifier, the spec requires 1170 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1171 * in atime, but we can't really assume that all servers will 1172 * so we ensure that our SETATTR sets both atime and mtime. 1173 * Set the VA_UTIMES_NULL flag for this case, so that 1174 * the server's time will be used. This is needed to 1175 * work around a bug in some Solaris servers, where 1176 * setting the time TOCLIENT causes the Setattr RPC 1177 * to return NFS_OK, but not set va_mode. 1178 */ 1179 if (vap->va_mtime.tv_sec == VNOVAL) { 1180 vfs_timestamp(&vap->va_mtime); 1181 vap->va_vaflags |= VA_UTIMES_NULL; 1182 } 1183 if (vap->va_atime.tv_sec == VNOVAL) 1184 vap->va_atime = vap->va_mtime; 1185 return (1); 1186 } 1187 1188 /* 1189 * Map nfsv4 errors to errno.h errors. 1190 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1191 * error should only be returned for the Open, Create and Setattr Ops. 1192 * As such, most calls can just pass in 0 for those arguments. 1193 */ 1194 APPLESTATIC int 1195 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1196 { 1197 struct proc *p; 1198 1199 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1200 return (error); 1201 if (td != NULL) 1202 p = td->td_proc; 1203 else 1204 p = NULL; 1205 switch (error) { 1206 case NFSERR_BADOWNER: 1207 tprintf(p, LOG_INFO, 1208 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1209 uid, gid); 1210 return (EPERM); 1211 case NFSERR_BADNAME: 1212 case NFSERR_BADCHAR: 1213 printf("nfsv4 char/name not handled by server\n"); 1214 return (ENOENT); 1215 case NFSERR_STALECLIENTID: 1216 case NFSERR_STALESTATEID: 1217 case NFSERR_EXPIRED: 1218 case NFSERR_BADSTATEID: 1219 case NFSERR_BADSESSION: 1220 printf("nfsv4 recover err returned %d\n", error); 1221 return (EIO); 1222 case NFSERR_BADHANDLE: 1223 case NFSERR_SERVERFAULT: 1224 case NFSERR_BADTYPE: 1225 case NFSERR_FHEXPIRED: 1226 case NFSERR_RESOURCE: 1227 case NFSERR_MOVED: 1228 case NFSERR_NOFILEHANDLE: 1229 case NFSERR_MINORVERMISMATCH: 1230 case NFSERR_OLDSTATEID: 1231 case NFSERR_BADSEQID: 1232 case NFSERR_LEASEMOVED: 1233 case NFSERR_RECLAIMBAD: 1234 case NFSERR_BADXDR: 1235 case NFSERR_OPILLEGAL: 1236 printf("nfsv4 client/server protocol prob err=%d\n", 1237 error); 1238 return (EIO); 1239 default: 1240 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1241 return (EIO); 1242 }; 1243 } 1244 1245 /* 1246 * Check to see if the process for this owner exists. Return 1 if it doesn't 1247 * and 0 otherwise. 1248 */ 1249 int 1250 nfscl_procdoesntexist(u_int8_t *own) 1251 { 1252 union { 1253 u_int32_t lval; 1254 u_int8_t cval[4]; 1255 } tl; 1256 struct proc *p; 1257 pid_t pid; 1258 int i, ret = 0; 1259 1260 /* For the single open_owner of all 0 bytes, just return 0. */ 1261 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1262 if (own[i] != 0) 1263 break; 1264 if (i == NFSV4CL_LOCKNAMELEN) 1265 return (0); 1266 1267 tl.cval[0] = *own++; 1268 tl.cval[1] = *own++; 1269 tl.cval[2] = *own++; 1270 tl.cval[3] = *own++; 1271 pid = tl.lval; 1272 p = pfind_locked(pid); 1273 if (p == NULL) 1274 return (1); 1275 if (p->p_stats == NULL) { 1276 PROC_UNLOCK(p); 1277 return (0); 1278 } 1279 tl.cval[0] = *own++; 1280 tl.cval[1] = *own++; 1281 tl.cval[2] = *own++; 1282 tl.cval[3] = *own++; 1283 if (tl.lval != p->p_stats->p_start.tv_sec) { 1284 ret = 1; 1285 } else { 1286 tl.cval[0] = *own++; 1287 tl.cval[1] = *own++; 1288 tl.cval[2] = *own++; 1289 tl.cval[3] = *own; 1290 if (tl.lval != p->p_stats->p_start.tv_usec) 1291 ret = 1; 1292 } 1293 PROC_UNLOCK(p); 1294 return (ret); 1295 } 1296 1297 /* 1298 * - nfs pseudo system call for the client 1299 */ 1300 /* 1301 * MPSAFE 1302 */ 1303 static int 1304 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1305 { 1306 struct file *fp; 1307 struct nfscbd_args nfscbdarg; 1308 struct nfsd_nfscbd_args nfscbdarg2; 1309 struct nameidata nd; 1310 struct nfscl_dumpmntopts dumpmntopts; 1311 cap_rights_t rights; 1312 char *buf; 1313 int error; 1314 1315 if (uap->flag & NFSSVC_CBADDSOCK) { 1316 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1317 if (error) 1318 return (error); 1319 /* 1320 * Since we don't know what rights might be required, 1321 * pretend that we need them all. It is better to be too 1322 * careful than too reckless. 1323 */ 1324 error = fget(td, nfscbdarg.sock, 1325 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1326 if (error) 1327 return (error); 1328 if (fp->f_type != DTYPE_SOCKET) { 1329 fdrop(fp, td); 1330 return (EPERM); 1331 } 1332 error = nfscbd_addsock(fp); 1333 fdrop(fp, td); 1334 if (!error && nfscl_enablecallb == 0) { 1335 nfsv4_cbport = nfscbdarg.port; 1336 nfscl_enablecallb = 1; 1337 } 1338 } else if (uap->flag & NFSSVC_NFSCBD) { 1339 if (uap->argp == NULL) 1340 return (EINVAL); 1341 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1342 sizeof(nfscbdarg2)); 1343 if (error) 1344 return (error); 1345 error = nfscbd_nfsd(td, &nfscbdarg2); 1346 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1347 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1348 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1349 dumpmntopts.ndmnt_blen > 1024)) 1350 error = EINVAL; 1351 if (error == 0) 1352 error = nfsrv_lookupfilename(&nd, 1353 dumpmntopts.ndmnt_fname, td); 1354 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1355 "nfs") != 0) { 1356 vput(nd.ni_vp); 1357 error = EINVAL; 1358 } 1359 if (error == 0) { 1360 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1361 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1362 dumpmntopts.ndmnt_blen); 1363 vput(nd.ni_vp); 1364 error = copyout(buf, dumpmntopts.ndmnt_buf, 1365 dumpmntopts.ndmnt_blen); 1366 free(buf, M_TEMP); 1367 } 1368 } else { 1369 error = EINVAL; 1370 } 1371 return (error); 1372 } 1373 1374 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1375 1376 /* 1377 * Called once to initialize data structures... 1378 */ 1379 static int 1380 nfscl_modevent(module_t mod, int type, void *data) 1381 { 1382 int error = 0; 1383 static int loaded = 0; 1384 1385 switch (type) { 1386 case MOD_LOAD: 1387 if (loaded) 1388 return (0); 1389 newnfs_portinit(); 1390 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1391 nfscl_init(); 1392 NFSD_LOCK(); 1393 nfsrvd_cbinit(0); 1394 NFSD_UNLOCK(); 1395 ncl_call_invalcaches = ncl_invalcaches; 1396 nfsd_call_nfscl = nfssvc_nfscl; 1397 loaded = 1; 1398 break; 1399 1400 case MOD_UNLOAD: 1401 if (nfs_numnfscbd != 0) { 1402 error = EBUSY; 1403 break; 1404 } 1405 1406 /* 1407 * XXX: Unloading of nfscl module is unsupported. 1408 */ 1409 #if 0 1410 ncl_call_invalcaches = NULL; 1411 nfsd_call_nfscl = NULL; 1412 /* and get rid of the mutexes */ 1413 mtx_destroy(&ncl_iod_mutex); 1414 loaded = 0; 1415 break; 1416 #else 1417 /* FALLTHROUGH */ 1418 #endif 1419 default: 1420 error = EOPNOTSUPP; 1421 break; 1422 } 1423 return error; 1424 } 1425 static moduledata_t nfscl_mod = { 1426 "nfscl", 1427 nfscl_modevent, 1428 NULL, 1429 }; 1430 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1431 1432 /* So that loader and kldload(2) can find us, wherever we are.. */ 1433 MODULE_VERSION(nfscl, 1); 1434 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1435 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1436 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1437 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1438
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