1 /* $NetBSD: nfs_clport.c,v 1.2 2016/12/13 22:17:33 pgoyette Exp $ */ 2 /*- 3 * Copyright (c) 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Rick Macklem at The University of Guelph. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/cdefs.h> 36 /* __FBSDID("FreeBSD: head/sys/fs/nfsclient/nfs_clport.c 299413 2016-05-11 06:35:46Z kib "); */ 37 __RCSID("$NetBSD: nfs_clport.c,v 1.2 2016/12/13 22:17:33 pgoyette Exp $"); 38 39 #ifdef _KERNEL_OPT 40 #include "opt_inet.h" 41 #include "opt_inet6.h" 42 #endif 43 44 #include <sys/capsicum.h> 45 46 /* 47 * generally, I don't like #includes inside .h files, but it seems to 48 * be the easiest way to handle the port. 49 */ 50 #include <sys/fail.h> 51 52 #include <sys/hash.h> 53 #include <sys/sysctl.h> 54 #include <fs/nfs/common/nfsport.h> 55 56 #include <netinet/in_fib.h> 57 #include <netinet/if_ether.h> 58 #include <netinet6/ip6_var.h> 59 #include <net/if_types.h> 60 61 #include <fs/nfs/client/nfs_kdtrace.h> 62 63 #ifdef KDTRACE_HOOKS 64 dtrace_nfsclient_attrcache_flush_probe_func_t 65 dtrace_nfscl_attrcache_flush_done_probe; 66 uint32_t nfscl_attrcache_flush_done_id; 67 68 dtrace_nfsclient_attrcache_get_hit_probe_func_t 69 dtrace_nfscl_attrcache_get_hit_probe; 70 uint32_t nfscl_attrcache_get_hit_id; 71 72 dtrace_nfsclient_attrcache_get_miss_probe_func_t 73 dtrace_nfscl_attrcache_get_miss_probe; 74 uint32_t nfscl_attrcache_get_miss_id; 75 76 dtrace_nfsclient_attrcache_load_probe_func_t 77 dtrace_nfscl_attrcache_load_done_probe; 78 uint32_t nfscl_attrcache_load_done_id; 79 #endif /* !KDTRACE_HOOKS */ 80 81 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 82 extern struct vop_vector newnfs_vnodeops; 83 extern struct vop_vector newnfs_fifoops; 84 extern uma_zone_t newnfsnode_zone; 85 extern struct buf_ops buf_ops_newnfs; 86 extern int ncl_pbuf_freecnt; 87 extern short nfsv4_cbport; 88 extern int nfscl_enablecallb; 89 extern int nfs_numnfscbd; 90 extern int nfscl_inited; 91 struct mtx nfs_clstate_mutex; 92 struct mtx ncl_iod_mutex; 93 NFSDLOCKMUTEX; 94 95 extern void (*ncl_call_invalcaches)(struct vnode *); 96 97 SYSCTL_DECL(_vfs_nfs); 98 static int ncl_fileid_maxwarnings = 10; 99 SYSCTL_INT(_vfs_nfs, OID_AUTO, fileid_maxwarnings, CTLFLAG_RWTUN, 100 &ncl_fileid_maxwarnings, 0, 101 "Limit fileid corruption warnings; 0 is off; -1 is unlimited"); 102 static volatile int ncl_fileid_nwarnings; 103 104 static void nfscl_warn_fileid(struct nfsmount *, struct nfsvattr *, 105 struct nfsvattr *); 106 107 /* 108 * Comparison function for vfs_hash functions. 109 */ 110 int 111 newnfs_vncmpf(struct vnode *vp, void *arg) 112 { 113 struct nfsfh *nfhp = (struct nfsfh *)arg; 114 struct nfsnode *np = VTONFS(vp); 115 116 if (np->n_fhp->nfh_len != nfhp->nfh_len || 117 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 118 return (1); 119 return (0); 120 } 121 122 /* 123 * Look up a vnode/nfsnode by file handle. 124 * Callers must check for mount points!! 125 * In all cases, a pointer to a 126 * nfsnode structure is returned. 127 * This variant takes a "struct nfsfh *" as second argument and uses 128 * that structure up, either by hanging off the nfsnode or FREEing it. 129 */ 130 int 131 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 132 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 133 void *stuff, int lkflags) 134 { 135 struct nfsnode *np, *dnp; 136 struct vnode *vp, *nvp; 137 struct nfsv4node *newd, *oldd; 138 int error; 139 u_int hash; 140 struct nfsmount *nmp; 141 142 nmp = VFSTONFS(mntp); 143 dnp = VTONFS(dvp); 144 *npp = NULL; 145 146 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 147 148 error = vfs_hash_get(mntp, hash, lkflags, 149 td, &nvp, newnfs_vncmpf, nfhp); 150 if (error == 0 && nvp != NULL) { 151 /* 152 * I believe there is a slight chance that vgonel() could 153 * get called on this vnode between when NFSVOPLOCK() drops 154 * the VI_LOCK() and vget() acquires it again, so that it 155 * hasn't yet had v_usecount incremented. If this were to 156 * happen, the VI_DOOMED flag would be set, so check for 157 * that here. Since we now have the v_usecount incremented, 158 * we should be ok until we vrele() it, if the VI_DOOMED 159 * flag isn't set now. 160 */ 161 VI_LOCK(nvp); 162 if ((nvp->v_iflag & VI_DOOMED)) { 163 VI_UNLOCK(nvp); 164 vrele(nvp); 165 error = ENOENT; 166 } else { 167 VI_UNLOCK(nvp); 168 } 169 } 170 if (error) { 171 FREE((caddr_t)nfhp, M_NFSFH); 172 return (error); 173 } 174 if (nvp != NULL) { 175 np = VTONFS(nvp); 176 /* 177 * For NFSv4, check to see if it is the same name and 178 * replace the name, if it is different. 179 */ 180 oldd = newd = NULL; 181 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 182 nvp->v_type == VREG && 183 (np->n_v4->n4_namelen != cnp->cn_namelen || 184 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 185 cnp->cn_namelen) || 186 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 187 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 188 dnp->n_fhp->nfh_len))) { 189 MALLOC(newd, struct nfsv4node *, 190 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 191 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 192 NFSLOCKNODE(np); 193 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG 194 && (np->n_v4->n4_namelen != cnp->cn_namelen || 195 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 196 cnp->cn_namelen) || 197 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 198 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 199 dnp->n_fhp->nfh_len))) { 200 oldd = np->n_v4; 201 np->n_v4 = newd; 202 newd = NULL; 203 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 204 np->n_v4->n4_namelen = cnp->cn_namelen; 205 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 206 dnp->n_fhp->nfh_len); 207 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 208 cnp->cn_namelen); 209 } 210 NFSUNLOCKNODE(np); 211 } 212 if (newd != NULL) 213 FREE((caddr_t)newd, M_NFSV4NODE); 214 if (oldd != NULL) 215 FREE((caddr_t)oldd, M_NFSV4NODE); 216 *npp = np; 217 FREE((caddr_t)nfhp, M_NFSFH); 218 return (0); 219 } 220 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 221 222 error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp); 223 if (error) { 224 uma_zfree(newnfsnode_zone, np); 225 FREE((caddr_t)nfhp, M_NFSFH); 226 return (error); 227 } 228 vp = nvp; 229 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 230 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 231 vp->v_data = np; 232 np->n_vnode = vp; 233 /* 234 * Initialize the mutex even if the vnode is going to be a loser. 235 * This simplifies the logic in reclaim, which can then unconditionally 236 * destroy the mutex (in the case of the loser, or if hash_insert 237 * happened to return an error no special casing is needed). 238 */ 239 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 240 241 /* 242 * Are we getting the root? If so, make sure the vnode flags 243 * are correct 244 */ 245 if ((nfhp->nfh_len == nmp->nm_fhsize) && 246 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 247 if (vp->v_type == VNON) 248 vp->v_type = VDIR; 249 vp->v_vflag |= VV_ROOT; 250 } 251 252 np->n_fhp = nfhp; 253 /* 254 * For NFSv4, we have to attach the directory file handle and 255 * file name, so that Open Ops can be done later. 256 */ 257 if (nmp->nm_flag & NFSMNT_NFSV4) { 258 MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node) 259 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 260 M_WAITOK); 261 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 262 np->n_v4->n4_namelen = cnp->cn_namelen; 263 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 264 dnp->n_fhp->nfh_len); 265 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 266 cnp->cn_namelen); 267 } else { 268 np->n_v4 = NULL; 269 } 270 271 /* 272 * NFS supports recursive and shared locking. 273 */ 274 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 275 VN_LOCK_AREC(vp); 276 VN_LOCK_ASHARE(vp); 277 error = insmntque(vp, mntp); 278 if (error != 0) { 279 *npp = NULL; 280 mtx_destroy(&np->n_mtx); 281 FREE((caddr_t)nfhp, M_NFSFH); 282 if (np->n_v4 != NULL) 283 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 284 uma_zfree(newnfsnode_zone, np); 285 return (error); 286 } 287 error = vfs_hash_insert(vp, hash, lkflags, 288 td, &nvp, newnfs_vncmpf, nfhp); 289 if (error) 290 return (error); 291 if (nvp != NULL) { 292 *npp = VTONFS(nvp); 293 /* vfs_hash_insert() vput()'s the losing vnode */ 294 return (0); 295 } 296 *npp = np; 297 298 return (0); 299 } 300 301 /* 302 * Another variant of nfs_nget(). This one is only used by reopen. It 303 * takes almost the same args as nfs_nget(), but only succeeds if an entry 304 * exists in the cache. (Since files should already be "open" with a 305 * vnode ref cnt on the node when reopen calls this, it should always 306 * succeed.) 307 * Also, don't get a vnode lock, since it may already be locked by some 308 * other process that is handling it. This is ok, since all other threads 309 * on the client are blocked by the nfsc_lock being exclusively held by the 310 * caller of this function. 311 */ 312 int 313 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 314 struct thread *td, struct nfsnode **npp) 315 { 316 struct vnode *nvp; 317 u_int hash; 318 struct nfsfh *nfhp; 319 int error; 320 321 *npp = NULL; 322 /* For forced dismounts, just return error. */ 323 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 324 return (EINTR); 325 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 326 M_NFSFH, M_WAITOK); 327 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 328 nfhp->nfh_len = fhsize; 329 330 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 331 332 /* 333 * First, try to get the vnode locked, but don't block for the lock. 334 */ 335 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 336 newnfs_vncmpf, nfhp); 337 if (error == 0 && nvp != NULL) { 338 NFSVOPUNLOCK(nvp, 0); 339 } else if (error == EBUSY) { 340 /* 341 * It is safe so long as a vflush() with 342 * FORCECLOSE has not been done. Since the Renew thread is 343 * stopped and the MNTK_UNMOUNTF flag is set before doing 344 * a vflush() with FORCECLOSE, we should be ok here. 345 */ 346 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 347 error = EINTR; 348 else { 349 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp); 350 if (nvp == NULL) { 351 error = ENOENT; 352 } else if ((nvp->v_iflag & VI_DOOMED) != 0) { 353 error = ENOENT; 354 vrele(nvp); 355 } else { 356 error = 0; 357 } 358 } 359 } 360 FREE(nfhp, M_NFSFH); 361 if (error) 362 return (error); 363 if (nvp != NULL) { 364 *npp = VTONFS(nvp); 365 return (0); 366 } 367 return (EINVAL); 368 } 369 370 static void 371 nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap, 372 struct nfsvattr *newnap) 373 { 374 int off; 375 376 if (ncl_fileid_maxwarnings >= 0 && 377 ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 378 return; 379 off = 0; 380 if (ncl_fileid_maxwarnings >= 0) { 381 if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings) 382 off = 1; 383 } 384 385 printf("newnfs: server '%s' error: fileid changed. " 386 "fsid %jx:%jx: expected fileid %#jx, got %#jx. " 387 "(BROKEN NFS SERVER OR MIDDLEWARE)\n", 388 nmp->nm_com.nmcom_hostname, 389 (uintmax_t)nmp->nm_fsid[0], 390 (uintmax_t)nmp->nm_fsid[1], 391 (uintmax_t)oldnap->na_fileid, 392 (uintmax_t)newnap->na_fileid); 393 394 if (off) 395 printf("newnfs: Logged %d times about fileid corruption; " 396 "going quiet to avoid spamming logs excessively. (Limit " 397 "is: %d).\n", ncl_fileid_nwarnings, 398 ncl_fileid_maxwarnings); 399 } 400 401 /* 402 * Load the attribute cache (that lives in the nfsnode entry) with 403 * the attributes of the second argument and 404 * Iff vaper not NULL 405 * copy the attributes to *vaper 406 * Similar to nfs_loadattrcache(), except the attributes are passed in 407 * instead of being parsed out of the mbuf list. 408 */ 409 int 410 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 411 void *stuff, int writeattr, int dontshrink) 412 { 413 struct vnode *vp = *vpp; 414 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 415 struct nfsnode *np; 416 struct nfsmount *nmp; 417 struct timespec mtime_save; 418 u_quad_t nsize; 419 int setnsize, error, force_fid_err; 420 421 error = 0; 422 setnsize = 0; 423 nsize = 0; 424 425 /* 426 * If v_type == VNON it is a new node, so fill in the v_type, 427 * n_mtime fields. Check to see if it represents a special 428 * device, and if so, check for a possible alias. Once the 429 * correct vnode has been obtained, fill in the rest of the 430 * information. 431 */ 432 np = VTONFS(vp); 433 NFSLOCKNODE(np); 434 if (vp->v_type != nvap->va_type) { 435 vp->v_type = nvap->va_type; 436 if (vp->v_type == VFIFO) 437 vp->v_op = &newnfs_fifoops; 438 np->n_mtime = nvap->va_mtime; 439 } 440 nmp = VFSTONFS(vp->v_mount); 441 vap = &np->n_vattr.na_vattr; 442 mtime_save = vap->va_mtime; 443 if (writeattr) { 444 np->n_vattr.na_filerev = nap->na_filerev; 445 np->n_vattr.na_size = nap->na_size; 446 np->n_vattr.na_mtime = nap->na_mtime; 447 np->n_vattr.na_ctime = nap->na_ctime; 448 np->n_vattr.na_fsid = nap->na_fsid; 449 np->n_vattr.na_mode = nap->na_mode; 450 } else { 451 force_fid_err = 0; 452 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning, 453 force_fid_err); 454 /* 455 * BROKEN NFS SERVER OR MIDDLEWARE 456 * 457 * Certain NFS servers (certain old proprietary filers ca. 458 * 2006) or broken middleboxes (e.g. WAN accelerator products) 459 * will respond to GETATTR requests with results for a 460 * different fileid. 461 * 462 * The WAN accelerator we've observed not only serves stale 463 * cache results for a given file, it also occasionally serves 464 * results for wholly different files. This causes surprising 465 * problems; for example the cached size attribute of a file 466 * may truncate down and then back up, resulting in zero 467 * regions in file contents read by applications. We observed 468 * this reliably with Clang and .c files during parallel build. 469 * A pcap revealed packet fragmentation and GETATTR RPC 470 * responses with wholly wrong fileids. 471 */ 472 if ((np->n_vattr.na_fileid != 0 && 473 np->n_vattr.na_fileid != nap->na_fileid) || 474 force_fid_err) { 475 nfscl_warn_fileid(nmp, &np->n_vattr, nap); 476 error = EIDRM; 477 goto out; 478 } 479 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 480 sizeof (struct nfsvattr)); 481 } 482 483 /* 484 * For NFSv4, if the node's fsid is not equal to the mount point's 485 * fsid, return the low order 32bits of the node's fsid. This 486 * allows getcwd(3) to work. There is a chance that the fsid might 487 * be the same as a local fs, but since this is in an NFS mount 488 * point, I don't think that will cause any problems? 489 */ 490 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 491 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 492 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 493 /* 494 * va_fsid needs to be set to some value derived from 495 * np->n_vattr.na_filesid that is not equal 496 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes 497 * from the value used for the top level server volume 498 * in the mounted subtree. 499 */ 500 if (vp->v_mount->mnt_stat.f_fsid.val[0] != 501 (uint32_t)np->n_vattr.na_filesid[0]) 502 vap->va_fsid = (uint32_t)np->n_vattr.na_filesid[0]; 503 else 504 vap->va_fsid = (uint32_t)hash32_buf( 505 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0); 506 } else 507 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 508 np->n_attrstamp = time_second; 509 if (vap->va_size != np->n_size) { 510 if (vap->va_type == VREG) { 511 if (dontshrink && vap->va_size < np->n_size) { 512 /* 513 * We've been told not to shrink the file; 514 * zero np->n_attrstamp to indicate that 515 * the attributes are stale. 516 */ 517 vap->va_size = np->n_size; 518 np->n_attrstamp = 0; 519 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 520 vnode_pager_setsize(vp, np->n_size); 521 } else if (np->n_flag & NMODIFIED) { 522 /* 523 * We've modified the file: Use the larger 524 * of our size, and the server's size. 525 */ 526 if (vap->va_size < np->n_size) { 527 vap->va_size = np->n_size; 528 } else { 529 np->n_size = vap->va_size; 530 np->n_flag |= NSIZECHANGED; 531 } 532 vnode_pager_setsize(vp, np->n_size); 533 } else if (vap->va_size < np->n_size) { 534 /* 535 * When shrinking the size, the call to 536 * vnode_pager_setsize() cannot be done 537 * with the mutex held, so delay it until 538 * after the mtx_unlock call. 539 */ 540 nsize = np->n_size = vap->va_size; 541 np->n_flag |= NSIZECHANGED; 542 setnsize = 1; 543 } else { 544 np->n_size = vap->va_size; 545 np->n_flag |= NSIZECHANGED; 546 vnode_pager_setsize(vp, np->n_size); 547 } 548 } else { 549 np->n_size = vap->va_size; 550 } 551 } 552 /* 553 * The following checks are added to prevent a race between (say) 554 * a READDIR+ and a WRITE. 555 * READDIR+, WRITE requests sent out. 556 * READDIR+ resp, WRITE resp received on client. 557 * However, the WRITE resp was handled before the READDIR+ resp 558 * causing the post op attrs from the write to be loaded first 559 * and the attrs from the READDIR+ to be loaded later. If this 560 * happens, we have stale attrs loaded into the attrcache. 561 * We detect this by for the mtime moving back. We invalidate the 562 * attrcache when this happens. 563 */ 564 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 565 /* Size changed or mtime went backwards */ 566 np->n_attrstamp = 0; 567 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 568 } 569 if (vaper != NULL) { 570 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 571 if (np->n_flag & NCHG) { 572 if (np->n_flag & NACC) 573 vaper->va_atime = np->n_atim; 574 if (np->n_flag & NUPD) 575 vaper->va_mtime = np->n_mtim; 576 } 577 } 578 579 out: 580 #ifdef KDTRACE_HOOKS 581 if (np->n_attrstamp != 0) 582 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error); 583 #endif 584 NFSUNLOCKNODE(np); 585 if (setnsize) 586 vnode_pager_setsize(vp, nsize); 587 return (error); 588 } 589 590 /* 591 * Fill in the client id name. For these bytes: 592 * 1 - they must be unique 593 * 2 - they should be persistent across client reboots 594 * 1 is more critical than 2 595 * Use the mount point's unique id plus either the uuid or, if that 596 * isn't set, random junk. 597 */ 598 void 599 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 600 { 601 int uuidlen; 602 603 /* 604 * First, put in the 64bit mount point identifier. 605 */ 606 if (idlen >= sizeof (u_int64_t)) { 607 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 608 cp += sizeof (u_int64_t); 609 idlen -= sizeof (u_int64_t); 610 } 611 612 /* 613 * If uuid is non-zero length, use it. 614 */ 615 uuidlen = strlen(uuid); 616 if (uuidlen > 0 && idlen >= uuidlen) { 617 NFSBCOPY(uuid, cp, uuidlen); 618 cp += uuidlen; 619 idlen -= uuidlen; 620 } 621 622 /* 623 * This only normally happens if the uuid isn't set. 624 */ 625 while (idlen > 0) { 626 *cp++ = (u_int8_t)(arc4random() % 256); 627 idlen--; 628 } 629 } 630 631 /* 632 * Fill in a lock owner name. For now, pid + the process's creation time. 633 */ 634 void 635 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 636 { 637 union { 638 u_int32_t lval; 639 u_int8_t cval[4]; 640 } tl; 641 struct proc *p; 642 643 if (id == NULL) { 644 printf("NULL id\n"); 645 bzero(cp, NFSV4CL_LOCKNAMELEN); 646 return; 647 } 648 if ((flags & F_POSIX) != 0) { 649 p = (struct proc *)id; 650 tl.lval = p->p_pid; 651 *cp++ = tl.cval[0]; 652 *cp++ = tl.cval[1]; 653 *cp++ = tl.cval[2]; 654 *cp++ = tl.cval[3]; 655 tl.lval = p->p_stats->p_start.tv_sec; 656 *cp++ = tl.cval[0]; 657 *cp++ = tl.cval[1]; 658 *cp++ = tl.cval[2]; 659 *cp++ = tl.cval[3]; 660 tl.lval = p->p_stats->p_start.tv_usec; 661 *cp++ = tl.cval[0]; 662 *cp++ = tl.cval[1]; 663 *cp++ = tl.cval[2]; 664 *cp = tl.cval[3]; 665 } else if ((flags & F_FLOCK) != 0) { 666 bcopy(&id, cp, sizeof(id)); 667 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 668 } else { 669 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 670 bzero(cp, NFSV4CL_LOCKNAMELEN); 671 } 672 } 673 674 /* 675 * Find the parent process for the thread passed in as an argument. 676 * If none exists, return NULL, otherwise return a thread for the parent. 677 * (Can be any of the threads, since it is only used for td->td_proc.) 678 */ 679 NFSPROC_T * 680 nfscl_getparent(struct thread *td) 681 { 682 struct proc *p; 683 struct thread *ptd; 684 685 if (td == NULL) 686 return (NULL); 687 p = td->td_proc; 688 if (p->p_pid == 0) 689 return (NULL); 690 p = p->p_pptr; 691 if (p == NULL) 692 return (NULL); 693 ptd = TAILQ_FIRST(&p->p_threads); 694 return (ptd); 695 } 696 697 /* 698 * Start up the renew kernel thread. 699 */ 700 static void 701 start_nfscl(void *arg) 702 { 703 struct nfsclclient *clp; 704 struct thread *td; 705 706 clp = (struct nfsclclient *)arg; 707 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 708 nfscl_renewthread(clp, td); 709 kproc_exit(0); 710 } 711 712 void 713 nfscl_start_renewthread(struct nfsclclient *clp) 714 { 715 716 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 717 "nfscl"); 718 } 719 720 /* 721 * Handle wcc_data. 722 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 723 * as the first Op after PutFH. 724 * (For NFSv4, the postop attributes are after the Op, so they can't be 725 * parsed here. A separate call to nfscl_postop_attr() is required.) 726 */ 727 int 728 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 729 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 730 { 731 u_int32_t *tl; 732 struct nfsnode *np = VTONFS(vp); 733 struct nfsvattr nfsva; 734 int error = 0; 735 736 if (wccflagp != NULL) 737 *wccflagp = 0; 738 if (nd->nd_flag & ND_NFSV3) { 739 *flagp = 0; 740 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 741 if (*tl == newnfs_true) { 742 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 743 if (wccflagp != NULL) { 744 mtx_lock(&np->n_mtx); 745 *wccflagp = (np->n_mtime.tv_sec == 746 fxdr_unsigned(u_int32_t, *(tl + 2)) && 747 np->n_mtime.tv_nsec == 748 fxdr_unsigned(u_int32_t, *(tl + 3))); 749 mtx_unlock(&np->n_mtx); 750 } 751 } 752 error = nfscl_postop_attr(nd, nap, flagp, stuff); 753 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 754 == (ND_NFSV4 | ND_V4WCCATTR)) { 755 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 756 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 757 NULL, NULL, NULL, NULL, NULL); 758 if (error) 759 return (error); 760 /* 761 * Get rid of Op# and status for next op. 762 */ 763 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 764 if (*++tl) 765 nd->nd_flag |= ND_NOMOREDATA; 766 if (wccflagp != NULL && 767 nfsva.na_vattr.va_mtime.tv_sec != 0) { 768 mtx_lock(&np->n_mtx); 769 *wccflagp = (np->n_mtime.tv_sec == 770 nfsva.na_vattr.va_mtime.tv_sec && 771 np->n_mtime.tv_nsec == 772 nfsva.na_vattr.va_mtime.tv_sec); 773 mtx_unlock(&np->n_mtx); 774 } 775 } 776 nfsmout: 777 return (error); 778 } 779 780 /* 781 * Get postop attributes. 782 */ 783 int 784 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 785 void *stuff) 786 { 787 u_int32_t *tl; 788 int error = 0; 789 790 *retp = 0; 791 if (nd->nd_flag & ND_NOMOREDATA) 792 return (error); 793 if (nd->nd_flag & ND_NFSV3) { 794 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 795 *retp = fxdr_unsigned(int, *tl); 796 } else if (nd->nd_flag & ND_NFSV4) { 797 /* 798 * For NFSv4, the postop attr are at the end, so no point 799 * in looking if nd_repstat != 0. 800 */ 801 if (!nd->nd_repstat) { 802 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 803 if (*(tl + 1)) 804 /* should never happen since nd_repstat != 0 */ 805 nd->nd_flag |= ND_NOMOREDATA; 806 else 807 *retp = 1; 808 } 809 } else if (!nd->nd_repstat) { 810 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 811 *retp = 1; 812 } 813 if (*retp) { 814 error = nfsm_loadattr(nd, nap); 815 if (error) 816 *retp = 0; 817 } 818 nfsmout: 819 return (error); 820 } 821 822 /* 823 * Fill in the setable attributes. The full argument indicates whether 824 * to fill in them all or just mode and time. 825 */ 826 void 827 nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap, 828 struct vnode *vp, int flags, u_int32_t rdev) 829 { 830 u_int32_t *tl; 831 struct nfsv2_sattr *sp; 832 nfsattrbit_t attrbits; 833 834 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 835 case ND_NFSV2: 836 NFSM_BUILD(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 837 if (vap->va_mode == (mode_t)VNOVAL) 838 sp->sa_mode = newnfs_xdrneg1; 839 else 840 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 841 if (vap->va_uid == (uid_t)VNOVAL) 842 sp->sa_uid = newnfs_xdrneg1; 843 else 844 sp->sa_uid = txdr_unsigned(vap->va_uid); 845 if (vap->va_gid == (gid_t)VNOVAL) 846 sp->sa_gid = newnfs_xdrneg1; 847 else 848 sp->sa_gid = txdr_unsigned(vap->va_gid); 849 if (flags & NFSSATTR_SIZE0) 850 sp->sa_size = 0; 851 else if (flags & NFSSATTR_SIZENEG1) 852 sp->sa_size = newnfs_xdrneg1; 853 else if (flags & NFSSATTR_SIZERDEV) 854 sp->sa_size = txdr_unsigned(rdev); 855 else 856 sp->sa_size = txdr_unsigned(vap->va_size); 857 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 858 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 859 break; 860 case ND_NFSV3: 861 if (vap->va_mode != (mode_t)VNOVAL) { 862 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 863 *tl++ = newnfs_true; 864 *tl = txdr_unsigned(vap->va_mode); 865 } else { 866 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 867 *tl = newnfs_false; 868 } 869 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) { 870 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 871 *tl++ = newnfs_true; 872 *tl = txdr_unsigned(vap->va_uid); 873 } else { 874 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 875 *tl = newnfs_false; 876 } 877 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) { 878 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 879 *tl++ = newnfs_true; 880 *tl = txdr_unsigned(vap->va_gid); 881 } else { 882 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 883 *tl = newnfs_false; 884 } 885 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) { 886 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 887 *tl++ = newnfs_true; 888 txdr_hyper(vap->va_size, tl); 889 } else { 890 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 891 *tl = newnfs_false; 892 } 893 if (vap->va_atime.tv_sec != VNOVAL) { 894 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 895 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 896 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 897 txdr_nfsv3time(&vap->va_atime, tl); 898 } else { 899 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 900 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 901 } 902 } else { 903 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 904 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 905 } 906 if (vap->va_mtime.tv_sec != VNOVAL) { 907 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 908 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 909 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 910 txdr_nfsv3time(&vap->va_mtime, tl); 911 } else { 912 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 913 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 914 } 915 } else { 916 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 917 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 918 } 919 break; 920 case ND_NFSV4: 921 NFSZERO_ATTRBIT(&attrbits); 922 if (vap->va_mode != (mode_t)VNOVAL) 923 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_MODE); 924 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) 925 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER); 926 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) 927 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP); 928 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) 929 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 930 if (vap->va_atime.tv_sec != VNOVAL) 931 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET); 932 if (vap->va_mtime.tv_sec != VNOVAL) 933 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET); 934 (void) nfsv4_fillattr(nd, vp->v_mount, vp, NULL, vap, NULL, 0, 935 &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0); 936 break; 937 } 938 } 939 940 /* 941 * nfscl_request() - mostly a wrapper for newnfs_request(). 942 */ 943 int 944 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 945 struct ucred *cred, void *stuff) 946 { 947 int ret, vers; 948 struct nfsmount *nmp; 949 950 nmp = VFSTONFS(vp->v_mount); 951 if (nd->nd_flag & ND_NFSV4) 952 vers = NFS_VER4; 953 else if (nd->nd_flag & ND_NFSV3) 954 vers = NFS_VER3; 955 else 956 vers = NFS_VER2; 957 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 958 NFS_PROG, vers, NULL, 1, NULL, NULL); 959 return (ret); 960 } 961 962 /* 963 * fill in this bsden's variant of statfs using nfsstatfs. 964 */ 965 void 966 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 967 { 968 struct statfs *sbp = (struct statfs *)statfs; 969 970 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 971 sbp->f_bsize = NFS_FABLKSIZE; 972 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 973 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 974 /* 975 * Although sf_abytes is uint64_t and f_bavail is int64_t, 976 * the value after dividing by NFS_FABLKSIZE is small 977 * enough that it will fit in 63bits, so it is ok to 978 * assign it to f_bavail without fear that it will become 979 * negative. 980 */ 981 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 982 sbp->f_files = sfp->sf_tfiles; 983 /* Since f_ffree is int64_t, clip it to 63bits. */ 984 if (sfp->sf_ffiles > INT64_MAX) 985 sbp->f_ffree = INT64_MAX; 986 else 987 sbp->f_ffree = sfp->sf_ffiles; 988 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 989 /* 990 * The type casts to (int32_t) ensure that this code is 991 * compatible with the old NFS client, in that it will 992 * propagate bit31 to the high order bits. This may or may 993 * not be correct for NFSv2, but since it is a legacy 994 * environment, I'd rather retain backwards compatibility. 995 */ 996 sbp->f_bsize = (int32_t)sfp->sf_bsize; 997 sbp->f_blocks = (int32_t)sfp->sf_blocks; 998 sbp->f_bfree = (int32_t)sfp->sf_bfree; 999 sbp->f_bavail = (int32_t)sfp->sf_bavail; 1000 sbp->f_files = 0; 1001 sbp->f_ffree = 0; 1002 } 1003 } 1004 1005 /* 1006 * Use the fsinfo stuff to update the mount point. 1007 */ 1008 void 1009 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 1010 { 1011 1012 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 1013 fsp->fs_wtpref >= NFS_FABLKSIZE) 1014 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 1015 ~(NFS_FABLKSIZE - 1); 1016 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 1017 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 1018 if (nmp->nm_wsize == 0) 1019 nmp->nm_wsize = fsp->fs_wtmax; 1020 } 1021 if (nmp->nm_wsize < NFS_FABLKSIZE) 1022 nmp->nm_wsize = NFS_FABLKSIZE; 1023 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 1024 fsp->fs_rtpref >= NFS_FABLKSIZE) 1025 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 1026 ~(NFS_FABLKSIZE - 1); 1027 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 1028 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 1029 if (nmp->nm_rsize == 0) 1030 nmp->nm_rsize = fsp->fs_rtmax; 1031 } 1032 if (nmp->nm_rsize < NFS_FABLKSIZE) 1033 nmp->nm_rsize = NFS_FABLKSIZE; 1034 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 1035 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 1036 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 1037 ~(NFS_DIRBLKSIZ - 1); 1038 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 1039 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 1040 if (nmp->nm_readdirsize == 0) 1041 nmp->nm_readdirsize = fsp->fs_rtmax; 1042 } 1043 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 1044 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 1045 if (fsp->fs_maxfilesize > 0 && 1046 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 1047 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 1048 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 1049 nmp->nm_state |= NFSSTA_GOTFSINFO; 1050 } 1051 1052 /* 1053 * Lookups source address which should be used to communicate with 1054 * @nmp and stores it inside @pdst. 1055 * 1056 * Returns 0 on success. 1057 */ 1058 u_int8_t * 1059 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p) 1060 { 1061 #if defined(INET6) || defined(INET) 1062 int error, fibnum; 1063 1064 fibnum = curthread->td_proc->p_fibnum; 1065 #endif 1066 #ifdef INET 1067 if (nmp->nm_nam->sa_family == AF_INET) { 1068 struct sockaddr_in *sin; 1069 struct nhop4_extended nh_ext; 1070 1071 sin = (struct sockaddr_in *)nmp->nm_nam; 1072 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1073 error = fib4_lookup_nh_ext(fibnum, sin->sin_addr, 0, 0, 1074 &nh_ext); 1075 CURVNET_RESTORE(); 1076 if (error != 0) 1077 return (NULL); 1078 1079 if ((ntohl(nh_ext.nh_src.s_addr) >> IN_CLASSA_NSHIFT) == 1080 IN_LOOPBACKNET) { 1081 /* Ignore loopback addresses */ 1082 return (NULL); 1083 } 1084 1085 *isinet6p = 0; 1086 *((struct in_addr *)paddr) = nh_ext.nh_src; 1087 1088 return (u_int8_t *)paddr; 1089 } 1090 #endif 1091 #ifdef INET6 1092 if (nmp->nm_nam->sa_family == AF_INET6) { 1093 struct sockaddr_in6 *sin6; 1094 1095 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1096 1097 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1098 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr, 1099 sin6->sin6_scope_id, NULL, paddr, NULL); 1100 CURVNET_RESTORE(); 1101 if (error != 0) 1102 return (NULL); 1103 1104 if (IN6_IS_ADDR_LOOPBACK(paddr)) 1105 return (NULL); 1106 1107 /* Scope is embedded in */ 1108 *isinet6p = 1; 1109 1110 return (u_int8_t *)paddr; 1111 } 1112 #endif 1113 return (NULL); 1114 } 1115 1116 /* 1117 * Copy NFS uid, gids from the cred structure. 1118 */ 1119 void 1120 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1121 { 1122 int i; 1123 1124 KASSERT(cr->cr_ngroups >= 0, 1125 ("newnfs_copyincred: negative cr_ngroups")); 1126 nfscr->nfsc_uid = cr->cr_uid; 1127 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1128 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1129 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1130 } 1131 1132 1133 /* 1134 * Do any client specific initialization. 1135 */ 1136 void 1137 nfscl_init(void) 1138 { 1139 static int inited = 0; 1140 1141 if (inited) 1142 return; 1143 inited = 1; 1144 nfscl_inited = 1; 1145 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1146 } 1147 1148 /* 1149 * Check each of the attributes to be set, to ensure they aren't already 1150 * the correct value. Disable setting ones already correct. 1151 */ 1152 int 1153 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1154 { 1155 1156 if (vap->va_mode != (mode_t)VNOVAL) { 1157 if (vap->va_mode == nvap->na_mode) 1158 vap->va_mode = (mode_t)VNOVAL; 1159 } 1160 if (vap->va_uid != (uid_t)VNOVAL) { 1161 if (vap->va_uid == nvap->na_uid) 1162 vap->va_uid = (uid_t)VNOVAL; 1163 } 1164 if (vap->va_gid != (gid_t)VNOVAL) { 1165 if (vap->va_gid == nvap->na_gid) 1166 vap->va_gid = (gid_t)VNOVAL; 1167 } 1168 if (vap->va_size != VNOVAL) { 1169 if (vap->va_size == nvap->na_size) 1170 vap->va_size = VNOVAL; 1171 } 1172 1173 /* 1174 * We are normally called with only a partially initialized 1175 * VAP. Since the NFSv3 spec says that server may use the 1176 * file attributes to store the verifier, the spec requires 1177 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1178 * in atime, but we can't really assume that all servers will 1179 * so we ensure that our SETATTR sets both atime and mtime. 1180 * Set the VA_UTIMES_NULL flag for this case, so that 1181 * the server's time will be used. This is needed to 1182 * work around a bug in some Solaris servers, where 1183 * setting the time TOCLIENT causes the Setattr RPC 1184 * to return NFS_OK, but not set va_mode. 1185 */ 1186 if (vap->va_mtime.tv_sec == VNOVAL) { 1187 vfs_timestamp(&vap->va_mtime); 1188 vap->va_vaflags |= VA_UTIMES_NULL; 1189 } 1190 if (vap->va_atime.tv_sec == VNOVAL) 1191 vap->va_atime = vap->va_mtime; 1192 return (1); 1193 } 1194 1195 /* 1196 * Map nfsv4 errors to errno.h errors. 1197 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1198 * error should only be returned for the Open, Create and Setattr Ops. 1199 * As such, most calls can just pass in 0 for those arguments. 1200 */ 1201 APPLESTATIC int 1202 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1203 { 1204 struct proc *p; 1205 1206 if (error < 10000) 1207 return (error); 1208 if (td != NULL) 1209 p = td->td_proc; 1210 else 1211 p = NULL; 1212 switch (error) { 1213 case NFSERR_BADOWNER: 1214 tprintf(p, LOG_INFO, 1215 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1216 uid, gid); 1217 return (EPERM); 1218 case NFSERR_BADNAME: 1219 case NFSERR_BADCHAR: 1220 printf("nfsv4 char/name not handled by server\n"); 1221 return (ENOENT); 1222 case NFSERR_STALECLIENTID: 1223 case NFSERR_STALESTATEID: 1224 case NFSERR_EXPIRED: 1225 case NFSERR_BADSTATEID: 1226 case NFSERR_BADSESSION: 1227 printf("nfsv4 recover err returned %d\n", error); 1228 return (EIO); 1229 case NFSERR_BADHANDLE: 1230 case NFSERR_SERVERFAULT: 1231 case NFSERR_BADTYPE: 1232 case NFSERR_FHEXPIRED: 1233 case NFSERR_RESOURCE: 1234 case NFSERR_MOVED: 1235 case NFSERR_NOFILEHANDLE: 1236 case NFSERR_MINORVERMISMATCH: 1237 case NFSERR_OLDSTATEID: 1238 case NFSERR_BADSEQID: 1239 case NFSERR_LEASEMOVED: 1240 case NFSERR_RECLAIMBAD: 1241 case NFSERR_BADXDR: 1242 case NFSERR_OPILLEGAL: 1243 printf("nfsv4 client/server protocol prob err=%d\n", 1244 error); 1245 return (EIO); 1246 default: 1247 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1248 return (EIO); 1249 }; 1250 } 1251 1252 /* 1253 * Check to see if the process for this owner exists. Return 1 if it doesn't 1254 * and 0 otherwise. 1255 */ 1256 int 1257 nfscl_procdoesntexist(u_int8_t *own) 1258 { 1259 union { 1260 u_int32_t lval; 1261 u_int8_t cval[4]; 1262 } tl; 1263 struct proc *p; 1264 pid_t pid; 1265 int ret = 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(&nfs_clstate_mutex, "nfs_clstate_mutex", NULL, 1391 MTX_DEF); 1392 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1393 nfscl_init(); 1394 NFSD_LOCK(); 1395 nfsrvd_cbinit(0); 1396 NFSD_UNLOCK(); 1397 ncl_call_invalcaches = ncl_invalcaches; 1398 nfsd_call_nfscl = nfssvc_nfscl; 1399 loaded = 1; 1400 break; 1401 1402 case MOD_UNLOAD: 1403 if (nfs_numnfscbd != 0) { 1404 error = EBUSY; 1405 break; 1406 } 1407 1408 /* 1409 * XXX: Unloading of nfscl module is unsupported. 1410 */ 1411 #if 0 1412 ncl_call_invalcaches = NULL; 1413 nfsd_call_nfscl = NULL; 1414 /* and get rid of the mutexes */ 1415 mtx_destroy(&nfs_clstate_mutex); 1416 mtx_destroy(&ncl_iod_mutex); 1417 loaded = 0; 1418 break; 1419 #else 1420 /* FALLTHROUGH */ 1421 #endif 1422 default: 1423 error = EOPNOTSUPP; 1424 break; 1425 } 1426 return error; 1427 } 1428 static moduledata_t nfscl_mod = { 1429 "nfscl", 1430 nfscl_modevent, 1431 NULL, 1432 }; 1433 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1434 1435 /* So that loader and kldload(2) can find us, wherever we are.. */ 1436 MODULE_VERSION(nfscl, 1); 1437 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1438 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1439 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1440 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1441 1442
Indexes created Sat Sep 20 22:09:52 GMT 2025