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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/10.4/sys/fs/nfsclient/nfs_clport.c 321057 2017-07-16 19:36:44Z rmacklem $"); 36 37 #include "opt_inet6.h" 38 #include "opt_kdtrace.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/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 ncl_iod_mutex; 82 NFSDLOCKMUTEX; 83 84 extern void (*ncl_call_invalcaches)(struct vnode *); 85 86 /* 87 * Comparison function for vfs_hash functions. 88 */ 89 int 90 newnfs_vncmpf(struct vnode *vp, void *arg) 91 { 92 struct nfsfh *nfhp = (struct nfsfh *)arg; 93 struct nfsnode *np = VTONFS(vp); 94 95 if (np->n_fhp->nfh_len != nfhp->nfh_len || 96 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 97 return (1); 98 return (0); 99 } 100 101 /* 102 * Look up a vnode/nfsnode by file handle. 103 * Callers must check for mount points!! 104 * In all cases, a pointer to a 105 * nfsnode structure is returned. 106 * This variant takes a "struct nfsfh *" as second argument and uses 107 * that structure up, either by hanging off the nfsnode or FREEing it. 108 */ 109 int 110 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 111 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 112 void *stuff, int lkflags) 113 { 114 struct nfsnode *np, *dnp; 115 struct vnode *vp, *nvp; 116 struct nfsv4node *newd, *oldd; 117 int error; 118 u_int hash; 119 struct nfsmount *nmp; 120 121 nmp = VFSTONFS(mntp); 122 dnp = VTONFS(dvp); 123 *npp = NULL; 124 125 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 126 127 error = vfs_hash_get(mntp, hash, lkflags, 128 td, &nvp, newnfs_vncmpf, nfhp); 129 if (error == 0 && nvp != NULL) { 130 /* 131 * I believe there is a slight chance that vgonel() could 132 * get called on this vnode between when NFSVOPLOCK() drops 133 * the VI_LOCK() and vget() acquires it again, so that it 134 * hasn't yet had v_usecount incremented. If this were to 135 * happen, the VI_DOOMED flag would be set, so check for 136 * that here. Since we now have the v_usecount incremented, 137 * we should be ok until we vrele() it, if the VI_DOOMED 138 * flag isn't set now. 139 */ 140 VI_LOCK(nvp); 141 if ((nvp->v_iflag & VI_DOOMED)) { 142 VI_UNLOCK(nvp); 143 vrele(nvp); 144 error = ENOENT; 145 } else { 146 VI_UNLOCK(nvp); 147 } 148 } 149 if (error) { 150 FREE((caddr_t)nfhp, M_NFSFH); 151 return (error); 152 } 153 if (nvp != NULL) { 154 np = VTONFS(nvp); 155 /* 156 * For NFSv4, check to see if it is the same name and 157 * replace the name, if it is different. 158 */ 159 oldd = newd = NULL; 160 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 161 nvp->v_type == VREG && 162 (np->n_v4->n4_namelen != cnp->cn_namelen || 163 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 164 cnp->cn_namelen) || 165 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 166 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 167 dnp->n_fhp->nfh_len))) { 168 MALLOC(newd, struct nfsv4node *, 169 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 170 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 171 NFSLOCKNODE(np); 172 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG 173 && (np->n_v4->n4_namelen != cnp->cn_namelen || 174 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 175 cnp->cn_namelen) || 176 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 177 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 178 dnp->n_fhp->nfh_len))) { 179 oldd = np->n_v4; 180 np->n_v4 = newd; 181 newd = NULL; 182 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 183 np->n_v4->n4_namelen = cnp->cn_namelen; 184 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 185 dnp->n_fhp->nfh_len); 186 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 187 cnp->cn_namelen); 188 } 189 NFSUNLOCKNODE(np); 190 } 191 if (newd != NULL) 192 FREE((caddr_t)newd, M_NFSV4NODE); 193 if (oldd != NULL) 194 FREE((caddr_t)oldd, M_NFSV4NODE); 195 *npp = np; 196 FREE((caddr_t)nfhp, M_NFSFH); 197 return (0); 198 } 199 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 200 201 error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp); 202 if (error) { 203 uma_zfree(newnfsnode_zone, np); 204 FREE((caddr_t)nfhp, M_NFSFH); 205 return (error); 206 } 207 vp = nvp; 208 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 209 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 210 vp->v_data = np; 211 np->n_vnode = vp; 212 /* 213 * Initialize the mutex even if the vnode is going to be a loser. 214 * This simplifies the logic in reclaim, which can then unconditionally 215 * destroy the mutex (in the case of the loser, or if hash_insert 216 * happened to return an error no special casing is needed). 217 */ 218 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 219 220 /* 221 * Are we getting the root? If so, make sure the vnode flags 222 * are correct 223 */ 224 if ((nfhp->nfh_len == nmp->nm_fhsize) && 225 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 226 if (vp->v_type == VNON) 227 vp->v_type = VDIR; 228 vp->v_vflag |= VV_ROOT; 229 } 230 231 np->n_fhp = nfhp; 232 /* 233 * For NFSv4, we have to attach the directory file handle and 234 * file name, so that Open Ops can be done later. 235 */ 236 if (nmp->nm_flag & NFSMNT_NFSV4) { 237 MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node) 238 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 239 M_WAITOK); 240 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 241 np->n_v4->n4_namelen = cnp->cn_namelen; 242 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 243 dnp->n_fhp->nfh_len); 244 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 245 cnp->cn_namelen); 246 } else { 247 np->n_v4 = NULL; 248 } 249 250 /* 251 * NFS supports recursive and shared locking. 252 */ 253 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 254 VN_LOCK_AREC(vp); 255 VN_LOCK_ASHARE(vp); 256 error = insmntque(vp, mntp); 257 if (error != 0) { 258 *npp = NULL; 259 mtx_destroy(&np->n_mtx); 260 FREE((caddr_t)nfhp, M_NFSFH); 261 if (np->n_v4 != NULL) 262 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 263 uma_zfree(newnfsnode_zone, np); 264 return (error); 265 } 266 error = vfs_hash_insert(vp, hash, lkflags, 267 td, &nvp, newnfs_vncmpf, nfhp); 268 if (error) 269 return (error); 270 if (nvp != NULL) { 271 *npp = VTONFS(nvp); 272 /* vfs_hash_insert() vput()'s the losing vnode */ 273 return (0); 274 } 275 *npp = np; 276 277 return (0); 278 } 279 280 /* 281 * Another variant of nfs_nget(). This one is only used by reopen. It 282 * takes almost the same args as nfs_nget(), but only succeeds if an entry 283 * exists in the cache. (Since files should already be "open" with a 284 * vnode ref cnt on the node when reopen calls this, it should always 285 * succeed.) 286 * Also, don't get a vnode lock, since it may already be locked by some 287 * other process that is handling it. This is ok, since all other threads 288 * on the client are blocked by the nfsc_lock being exclusively held by the 289 * caller of this function. 290 */ 291 int 292 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 293 struct thread *td, struct nfsnode **npp) 294 { 295 struct vnode *nvp; 296 u_int hash; 297 struct nfsfh *nfhp; 298 int error; 299 300 *npp = NULL; 301 /* For forced dismounts, just return error. */ 302 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 303 return (EINTR); 304 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 305 M_NFSFH, M_WAITOK); 306 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 307 nfhp->nfh_len = fhsize; 308 309 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 310 311 /* 312 * First, try to get the vnode locked, but don't block for the lock. 313 */ 314 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 315 newnfs_vncmpf, nfhp); 316 if (error == 0 && nvp != NULL) { 317 NFSVOPUNLOCK(nvp, 0); 318 } else if (error == EBUSY) { 319 /* 320 * It is safe so long as a vflush() with 321 * FORCECLOSE has not been done. Since the Renew thread is 322 * stopped and the MNTK_UNMOUNTF flag is set before doing 323 * a vflush() with FORCECLOSE, we should be ok here. 324 */ 325 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 326 error = EINTR; 327 else { 328 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp); 329 if (nvp == NULL) { 330 error = ENOENT; 331 } else if ((nvp->v_iflag & VI_DOOMED) != 0) { 332 error = ENOENT; 333 vrele(nvp); 334 } else { 335 error = 0; 336 } 337 } 338 } 339 FREE(nfhp, M_NFSFH); 340 if (error) 341 return (error); 342 if (nvp != NULL) { 343 *npp = VTONFS(nvp); 344 return (0); 345 } 346 return (EINVAL); 347 } 348 349 /* 350 * Load the attribute cache (that lives in the nfsnode entry) with 351 * the attributes of the second argument and 352 * Iff vaper not NULL 353 * copy the attributes to *vaper 354 * Similar to nfs_loadattrcache(), except the attributes are passed in 355 * instead of being parsed out of the mbuf list. 356 */ 357 int 358 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 359 void *stuff, int writeattr, int dontshrink) 360 { 361 struct vnode *vp = *vpp; 362 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 363 struct nfsnode *np; 364 struct nfsmount *nmp; 365 struct timespec mtime_save; 366 u_quad_t nsize; 367 int setnsize; 368 369 /* 370 * If v_type == VNON it is a new node, so fill in the v_type, 371 * n_mtime fields. Check to see if it represents a special 372 * device, and if so, check for a possible alias. Once the 373 * correct vnode has been obtained, fill in the rest of the 374 * information. 375 */ 376 np = VTONFS(vp); 377 NFSLOCKNODE(np); 378 if (vp->v_type != nvap->va_type) { 379 vp->v_type = nvap->va_type; 380 if (vp->v_type == VFIFO) 381 vp->v_op = &newnfs_fifoops; 382 np->n_mtime = nvap->va_mtime; 383 } 384 nmp = VFSTONFS(vp->v_mount); 385 vap = &np->n_vattr.na_vattr; 386 mtime_save = vap->va_mtime; 387 if (writeattr) { 388 np->n_vattr.na_filerev = nap->na_filerev; 389 np->n_vattr.na_size = nap->na_size; 390 np->n_vattr.na_mtime = nap->na_mtime; 391 np->n_vattr.na_ctime = nap->na_ctime; 392 np->n_vattr.na_fsid = nap->na_fsid; 393 np->n_vattr.na_mode = nap->na_mode; 394 } else { 395 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 396 sizeof (struct nfsvattr)); 397 } 398 399 /* 400 * For NFSv4, if the node's fsid is not equal to the mount point's 401 * fsid, return the low order 32bits of the node's fsid. This 402 * allows getcwd(3) to work. There is a chance that the fsid might 403 * be the same as a local fs, but since this is in an NFS mount 404 * point, I don't think that will cause any problems? 405 */ 406 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 407 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 408 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 409 /* 410 * va_fsid needs to be set to some value derived from 411 * np->n_vattr.na_filesid that is not equal 412 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes 413 * from the value used for the top level server volume 414 * in the mounted subtree. 415 */ 416 if (vp->v_mount->mnt_stat.f_fsid.val[0] != 417 (uint32_t)np->n_vattr.na_filesid[0]) 418 vap->va_fsid = (uint32_t)np->n_vattr.na_filesid[0]; 419 else 420 vap->va_fsid = (uint32_t)hash32_buf( 421 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0); 422 } else 423 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 424 np->n_attrstamp = time_second; 425 setnsize = 0; 426 nsize = 0; 427 if (vap->va_size != np->n_size) { 428 if (vap->va_type == VREG) { 429 if (dontshrink && vap->va_size < np->n_size) { 430 /* 431 * We've been told not to shrink the file; 432 * zero np->n_attrstamp to indicate that 433 * the attributes are stale. 434 */ 435 vap->va_size = np->n_size; 436 np->n_attrstamp = 0; 437 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 438 vnode_pager_setsize(vp, np->n_size); 439 } else if (np->n_flag & NMODIFIED) { 440 /* 441 * We've modified the file: Use the larger 442 * of our size, and the server's size. 443 */ 444 if (vap->va_size < np->n_size) { 445 vap->va_size = np->n_size; 446 } else { 447 np->n_size = vap->va_size; 448 np->n_flag |= NSIZECHANGED; 449 } 450 vnode_pager_setsize(vp, np->n_size); 451 } else if (vap->va_size < np->n_size) { 452 /* 453 * When shrinking the size, the call to 454 * vnode_pager_setsize() cannot be done 455 * with the mutex held, so delay it until 456 * after the mtx_unlock call. 457 */ 458 nsize = np->n_size = vap->va_size; 459 np->n_flag |= NSIZECHANGED; 460 setnsize = 1; 461 } else { 462 np->n_size = vap->va_size; 463 np->n_flag |= NSIZECHANGED; 464 vnode_pager_setsize(vp, np->n_size); 465 } 466 } else { 467 np->n_size = vap->va_size; 468 } 469 } 470 /* 471 * The following checks are added to prevent a race between (say) 472 * a READDIR+ and a WRITE. 473 * READDIR+, WRITE requests sent out. 474 * READDIR+ resp, WRITE resp received on client. 475 * However, the WRITE resp was handled before the READDIR+ resp 476 * causing the post op attrs from the write to be loaded first 477 * and the attrs from the READDIR+ to be loaded later. If this 478 * happens, we have stale attrs loaded into the attrcache. 479 * We detect this by for the mtime moving back. We invalidate the 480 * attrcache when this happens. 481 */ 482 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) { 483 /* Size changed or mtime went backwards */ 484 np->n_attrstamp = 0; 485 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); 486 } 487 if (vaper != NULL) { 488 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 489 if (np->n_flag & NCHG) { 490 if (np->n_flag & NACC) 491 vaper->va_atime = np->n_atim; 492 if (np->n_flag & NUPD) 493 vaper->va_mtime = np->n_mtim; 494 } 495 } 496 #ifdef KDTRACE_HOOKS 497 if (np->n_attrstamp != 0) 498 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, 0); 499 #endif 500 NFSUNLOCKNODE(np); 501 if (setnsize) 502 vnode_pager_setsize(vp, nsize); 503 return (0); 504 } 505 506 /* 507 * Fill in the client id name. For these bytes: 508 * 1 - they must be unique 509 * 2 - they should be persistent across client reboots 510 * 1 is more critical than 2 511 * Use the mount point's unique id plus either the uuid or, if that 512 * isn't set, random junk. 513 */ 514 void 515 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 516 { 517 int uuidlen; 518 519 /* 520 * First, put in the 64bit mount point identifier. 521 */ 522 if (idlen >= sizeof (u_int64_t)) { 523 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 524 cp += sizeof (u_int64_t); 525 idlen -= sizeof (u_int64_t); 526 } 527 528 /* 529 * If uuid is non-zero length, use it. 530 */ 531 uuidlen = strlen(uuid); 532 if (uuidlen > 0 && idlen >= uuidlen) { 533 NFSBCOPY(uuid, cp, uuidlen); 534 cp += uuidlen; 535 idlen -= uuidlen; 536 } 537 538 /* 539 * This only normally happens if the uuid isn't set. 540 */ 541 while (idlen > 0) { 542 *cp++ = (u_int8_t)(arc4random() % 256); 543 idlen--; 544 } 545 } 546 547 /* 548 * Fill in a lock owner name. For now, pid + the process's creation time. 549 */ 550 void 551 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 552 { 553 union { 554 u_int32_t lval; 555 u_int8_t cval[4]; 556 } tl; 557 struct proc *p; 558 559 if (id == NULL) { 560 /* Return the single open_owner of all 0 bytes. */ 561 bzero(cp, NFSV4CL_LOCKNAMELEN); 562 return; 563 } 564 if ((flags & F_POSIX) != 0) { 565 p = (struct proc *)id; 566 tl.lval = p->p_pid; 567 *cp++ = tl.cval[0]; 568 *cp++ = tl.cval[1]; 569 *cp++ = tl.cval[2]; 570 *cp++ = tl.cval[3]; 571 tl.lval = p->p_stats->p_start.tv_sec; 572 *cp++ = tl.cval[0]; 573 *cp++ = tl.cval[1]; 574 *cp++ = tl.cval[2]; 575 *cp++ = tl.cval[3]; 576 tl.lval = p->p_stats->p_start.tv_usec; 577 *cp++ = tl.cval[0]; 578 *cp++ = tl.cval[1]; 579 *cp++ = tl.cval[2]; 580 *cp = tl.cval[3]; 581 } else if ((flags & F_FLOCK) != 0) { 582 bcopy(&id, cp, sizeof(id)); 583 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 584 } else { 585 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 586 bzero(cp, NFSV4CL_LOCKNAMELEN); 587 } 588 } 589 590 /* 591 * Find the parent process for the thread passed in as an argument. 592 * If none exists, return NULL, otherwise return a thread for the parent. 593 * (Can be any of the threads, since it is only used for td->td_proc.) 594 */ 595 NFSPROC_T * 596 nfscl_getparent(struct thread *td) 597 { 598 struct proc *p; 599 struct thread *ptd; 600 601 if (td == NULL) 602 return (NULL); 603 p = td->td_proc; 604 if (p->p_pid == 0) 605 return (NULL); 606 p = p->p_pptr; 607 if (p == NULL) 608 return (NULL); 609 ptd = TAILQ_FIRST(&p->p_threads); 610 return (ptd); 611 } 612 613 /* 614 * Start up the renew kernel thread. 615 */ 616 static void 617 start_nfscl(void *arg) 618 { 619 struct nfsclclient *clp; 620 struct thread *td; 621 622 clp = (struct nfsclclient *)arg; 623 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 624 nfscl_renewthread(clp, td); 625 kproc_exit(0); 626 } 627 628 void 629 nfscl_start_renewthread(struct nfsclclient *clp) 630 { 631 632 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 633 "nfscl"); 634 } 635 636 /* 637 * Handle wcc_data. 638 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 639 * as the first Op after PutFH. 640 * (For NFSv4, the postop attributes are after the Op, so they can't be 641 * parsed here. A separate call to nfscl_postop_attr() is required.) 642 */ 643 int 644 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 645 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 646 { 647 u_int32_t *tl; 648 struct nfsnode *np = VTONFS(vp); 649 struct nfsvattr nfsva; 650 int error = 0; 651 652 if (wccflagp != NULL) 653 *wccflagp = 0; 654 if (nd->nd_flag & ND_NFSV3) { 655 *flagp = 0; 656 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 657 if (*tl == newnfs_true) { 658 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 659 if (wccflagp != NULL) { 660 mtx_lock(&np->n_mtx); 661 *wccflagp = (np->n_mtime.tv_sec == 662 fxdr_unsigned(u_int32_t, *(tl + 2)) && 663 np->n_mtime.tv_nsec == 664 fxdr_unsigned(u_int32_t, *(tl + 3))); 665 mtx_unlock(&np->n_mtx); 666 } 667 } 668 error = nfscl_postop_attr(nd, nap, flagp, stuff); 669 if (wccflagp != NULL && *flagp == 0) 670 *wccflagp = 0; 671 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 672 == (ND_NFSV4 | ND_V4WCCATTR)) { 673 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 674 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 675 NULL, NULL, NULL, NULL, NULL); 676 if (error) 677 return (error); 678 /* 679 * Get rid of Op# and status for next op. 680 */ 681 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 682 if (*++tl) 683 nd->nd_flag |= ND_NOMOREDATA; 684 if (wccflagp != NULL && 685 nfsva.na_vattr.va_mtime.tv_sec != 0) { 686 mtx_lock(&np->n_mtx); 687 *wccflagp = (np->n_mtime.tv_sec == 688 nfsva.na_vattr.va_mtime.tv_sec && 689 np->n_mtime.tv_nsec == 690 nfsva.na_vattr.va_mtime.tv_sec); 691 mtx_unlock(&np->n_mtx); 692 } 693 } 694 nfsmout: 695 return (error); 696 } 697 698 /* 699 * Get postop attributes. 700 */ 701 int 702 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 703 void *stuff) 704 { 705 u_int32_t *tl; 706 int error = 0; 707 708 *retp = 0; 709 if (nd->nd_flag & ND_NOMOREDATA) 710 return (error); 711 if (nd->nd_flag & ND_NFSV3) { 712 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 713 *retp = fxdr_unsigned(int, *tl); 714 } else if (nd->nd_flag & ND_NFSV4) { 715 /* 716 * For NFSv4, the postop attr are at the end, so no point 717 * in looking if nd_repstat != 0. 718 */ 719 if (!nd->nd_repstat) { 720 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 721 if (*(tl + 1)) 722 /* should never happen since nd_repstat != 0 */ 723 nd->nd_flag |= ND_NOMOREDATA; 724 else 725 *retp = 1; 726 } 727 } else if (!nd->nd_repstat) { 728 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 729 *retp = 1; 730 } 731 if (*retp) { 732 error = nfsm_loadattr(nd, nap); 733 if (error) 734 *retp = 0; 735 } 736 nfsmout: 737 return (error); 738 } 739 740 /* 741 * Fill in the setable attributes. The full argument indicates whether 742 * to fill in them all or just mode and time. 743 */ 744 void 745 nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap, 746 struct vnode *vp, int flags, u_int32_t rdev) 747 { 748 u_int32_t *tl; 749 struct nfsv2_sattr *sp; 750 nfsattrbit_t attrbits; 751 752 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 753 case ND_NFSV2: 754 NFSM_BUILD(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 755 if (vap->va_mode == (mode_t)VNOVAL) 756 sp->sa_mode = newnfs_xdrneg1; 757 else 758 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 759 if (vap->va_uid == (uid_t)VNOVAL) 760 sp->sa_uid = newnfs_xdrneg1; 761 else 762 sp->sa_uid = txdr_unsigned(vap->va_uid); 763 if (vap->va_gid == (gid_t)VNOVAL) 764 sp->sa_gid = newnfs_xdrneg1; 765 else 766 sp->sa_gid = txdr_unsigned(vap->va_gid); 767 if (flags & NFSSATTR_SIZE0) 768 sp->sa_size = 0; 769 else if (flags & NFSSATTR_SIZENEG1) 770 sp->sa_size = newnfs_xdrneg1; 771 else if (flags & NFSSATTR_SIZERDEV) 772 sp->sa_size = txdr_unsigned(rdev); 773 else 774 sp->sa_size = txdr_unsigned(vap->va_size); 775 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 776 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 777 break; 778 case ND_NFSV3: 779 if (vap->va_mode != (mode_t)VNOVAL) { 780 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 781 *tl++ = newnfs_true; 782 *tl = txdr_unsigned(vap->va_mode); 783 } else { 784 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 785 *tl = newnfs_false; 786 } 787 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) { 788 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 789 *tl++ = newnfs_true; 790 *tl = txdr_unsigned(vap->va_uid); 791 } else { 792 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 793 *tl = newnfs_false; 794 } 795 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) { 796 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 797 *tl++ = newnfs_true; 798 *tl = txdr_unsigned(vap->va_gid); 799 } else { 800 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 801 *tl = newnfs_false; 802 } 803 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) { 804 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 805 *tl++ = newnfs_true; 806 txdr_hyper(vap->va_size, tl); 807 } else { 808 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 809 *tl = newnfs_false; 810 } 811 if (vap->va_atime.tv_sec != VNOVAL) { 812 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 813 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 814 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 815 txdr_nfsv3time(&vap->va_atime, tl); 816 } else { 817 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 818 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 819 } 820 } else { 821 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 822 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 823 } 824 if (vap->va_mtime.tv_sec != VNOVAL) { 825 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 826 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 827 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 828 txdr_nfsv3time(&vap->va_mtime, tl); 829 } else { 830 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 831 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 832 } 833 } else { 834 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 835 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 836 } 837 break; 838 case ND_NFSV4: 839 NFSZERO_ATTRBIT(&attrbits); 840 if (vap->va_mode != (mode_t)VNOVAL) 841 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_MODE); 842 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) 843 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER); 844 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) 845 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP); 846 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) 847 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 848 if (vap->va_atime.tv_sec != VNOVAL) 849 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET); 850 if (vap->va_mtime.tv_sec != VNOVAL) 851 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET); 852 (void) nfsv4_fillattr(nd, vp->v_mount, vp, NULL, vap, NULL, 0, 853 &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0); 854 break; 855 }; 856 } 857 858 /* 859 * nfscl_request() - mostly a wrapper for newnfs_request(). 860 */ 861 int 862 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 863 struct ucred *cred, void *stuff) 864 { 865 int ret, vers; 866 struct nfsmount *nmp; 867 868 nmp = VFSTONFS(vp->v_mount); 869 if (nd->nd_flag & ND_NFSV4) 870 vers = NFS_VER4; 871 else if (nd->nd_flag & ND_NFSV3) 872 vers = NFS_VER3; 873 else 874 vers = NFS_VER2; 875 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 876 NFS_PROG, vers, NULL, 1, NULL, NULL); 877 return (ret); 878 } 879 880 /* 881 * fill in this bsden's variant of statfs using nfsstatfs. 882 */ 883 void 884 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 885 { 886 struct statfs *sbp = (struct statfs *)statfs; 887 888 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 889 sbp->f_bsize = NFS_FABLKSIZE; 890 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 891 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 892 /* 893 * Although sf_abytes is uint64_t and f_bavail is int64_t, 894 * the value after dividing by NFS_FABLKSIZE is small 895 * enough that it will fit in 63bits, so it is ok to 896 * assign it to f_bavail without fear that it will become 897 * negative. 898 */ 899 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 900 sbp->f_files = sfp->sf_tfiles; 901 /* Since f_ffree is int64_t, clip it to 63bits. */ 902 if (sfp->sf_ffiles > INT64_MAX) 903 sbp->f_ffree = INT64_MAX; 904 else 905 sbp->f_ffree = sfp->sf_ffiles; 906 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 907 /* 908 * The type casts to (int32_t) ensure that this code is 909 * compatible with the old NFS client, in that it will 910 * propagate bit31 to the high order bits. This may or may 911 * not be correct for NFSv2, but since it is a legacy 912 * environment, I'd rather retain backwards compatibility. 913 */ 914 sbp->f_bsize = (int32_t)sfp->sf_bsize; 915 sbp->f_blocks = (int32_t)sfp->sf_blocks; 916 sbp->f_bfree = (int32_t)sfp->sf_bfree; 917 sbp->f_bavail = (int32_t)sfp->sf_bavail; 918 sbp->f_files = 0; 919 sbp->f_ffree = 0; 920 } 921 } 922 923 /* 924 * Use the fsinfo stuff to update the mount point. 925 */ 926 void 927 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 928 { 929 930 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 931 fsp->fs_wtpref >= NFS_FABLKSIZE) 932 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 933 ~(NFS_FABLKSIZE - 1); 934 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 935 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 936 if (nmp->nm_wsize == 0) 937 nmp->nm_wsize = fsp->fs_wtmax; 938 } 939 if (nmp->nm_wsize < NFS_FABLKSIZE) 940 nmp->nm_wsize = NFS_FABLKSIZE; 941 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 942 fsp->fs_rtpref >= NFS_FABLKSIZE) 943 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 944 ~(NFS_FABLKSIZE - 1); 945 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 946 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 947 if (nmp->nm_rsize == 0) 948 nmp->nm_rsize = fsp->fs_rtmax; 949 } 950 if (nmp->nm_rsize < NFS_FABLKSIZE) 951 nmp->nm_rsize = NFS_FABLKSIZE; 952 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 953 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 954 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 955 ~(NFS_DIRBLKSIZ - 1); 956 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 957 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 958 if (nmp->nm_readdirsize == 0) 959 nmp->nm_readdirsize = fsp->fs_rtmax; 960 } 961 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 962 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 963 if (fsp->fs_maxfilesize > 0 && 964 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 965 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 966 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 967 nmp->nm_state |= NFSSTA_GOTFSINFO; 968 } 969 970 /* 971 * Get a pointer to my IP addrress and return it. 972 * Return NULL if you can't find one. 973 */ 974 u_int8_t * 975 nfscl_getmyip(struct nfsmount *nmp, int *isinet6p) 976 { 977 struct sockaddr_in sad, *sin; 978 struct rtentry *rt; 979 u_int8_t *retp = NULL; 980 static struct in_addr laddr; 981 982 *isinet6p = 0; 983 /* 984 * Loop up a route for the destination address. 985 */ 986 if (nmp->nm_nam->sa_family == AF_INET) { 987 bzero(&sad, sizeof (sad)); 988 sin = (struct sockaddr_in *)nmp->nm_nam; 989 sad.sin_family = AF_INET; 990 sad.sin_len = sizeof (struct sockaddr_in); 991 sad.sin_addr.s_addr = sin->sin_addr.s_addr; 992 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 993 rt = rtalloc1_fib((struct sockaddr *)&sad, 0, 0UL, 994 curthread->td_proc->p_fibnum); 995 if (rt != NULL) { 996 if (rt->rt_ifp != NULL && 997 rt->rt_ifa != NULL && 998 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) && 999 rt->rt_ifa->ifa_addr->sa_family == AF_INET) { 1000 sin = (struct sockaddr_in *) 1001 rt->rt_ifa->ifa_addr; 1002 laddr.s_addr = sin->sin_addr.s_addr; 1003 retp = (u_int8_t *)&laddr; 1004 } 1005 RTFREE_LOCKED(rt); 1006 } 1007 CURVNET_RESTORE(); 1008 #ifdef INET6 1009 } else if (nmp->nm_nam->sa_family == AF_INET6) { 1010 struct sockaddr_in6 sad6, *sin6; 1011 static struct in6_addr laddr6; 1012 1013 bzero(&sad6, sizeof (sad6)); 1014 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1015 sad6.sin6_family = AF_INET6; 1016 sad6.sin6_len = sizeof (struct sockaddr_in6); 1017 sad6.sin6_addr = sin6->sin6_addr; 1018 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1019 rt = rtalloc1_fib((struct sockaddr *)&sad6, 0, 0UL, 1020 curthread->td_proc->p_fibnum); 1021 if (rt != NULL) { 1022 if (rt->rt_ifp != NULL && 1023 rt->rt_ifa != NULL && 1024 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) && 1025 rt->rt_ifa->ifa_addr->sa_family == AF_INET6) { 1026 sin6 = (struct sockaddr_in6 *) 1027 rt->rt_ifa->ifa_addr; 1028 laddr6 = sin6->sin6_addr; 1029 retp = (u_int8_t *)&laddr6; 1030 *isinet6p = 1; 1031 } 1032 RTFREE_LOCKED(rt); 1033 } 1034 CURVNET_RESTORE(); 1035 #endif 1036 } 1037 return (retp); 1038 } 1039 1040 /* 1041 * Copy NFS uid, gids from the cred structure. 1042 */ 1043 void 1044 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1045 { 1046 int i; 1047 1048 KASSERT(cr->cr_ngroups >= 0, 1049 ("newnfs_copyincred: negative cr_ngroups")); 1050 nfscr->nfsc_uid = cr->cr_uid; 1051 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1052 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1053 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1054 } 1055 1056 1057 /* 1058 * Do any client specific initialization. 1059 */ 1060 void 1061 nfscl_init(void) 1062 { 1063 static int inited = 0; 1064 1065 if (inited) 1066 return; 1067 inited = 1; 1068 nfscl_inited = 1; 1069 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1070 } 1071 1072 /* 1073 * Check each of the attributes to be set, to ensure they aren't already 1074 * the correct value. Disable setting ones already correct. 1075 */ 1076 int 1077 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1078 { 1079 1080 if (vap->va_mode != (mode_t)VNOVAL) { 1081 if (vap->va_mode == nvap->na_mode) 1082 vap->va_mode = (mode_t)VNOVAL; 1083 } 1084 if (vap->va_uid != (uid_t)VNOVAL) { 1085 if (vap->va_uid == nvap->na_uid) 1086 vap->va_uid = (uid_t)VNOVAL; 1087 } 1088 if (vap->va_gid != (gid_t)VNOVAL) { 1089 if (vap->va_gid == nvap->na_gid) 1090 vap->va_gid = (gid_t)VNOVAL; 1091 } 1092 if (vap->va_size != VNOVAL) { 1093 if (vap->va_size == nvap->na_size) 1094 vap->va_size = VNOVAL; 1095 } 1096 1097 /* 1098 * We are normally called with only a partially initialized 1099 * VAP. Since the NFSv3 spec says that server may use the 1100 * file attributes to store the verifier, the spec requires 1101 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1102 * in atime, but we can't really assume that all servers will 1103 * so we ensure that our SETATTR sets both atime and mtime. 1104 * Set the VA_UTIMES_NULL flag for this case, so that 1105 * the server's time will be used. This is needed to 1106 * work around a bug in some Solaris servers, where 1107 * setting the time TOCLIENT causes the Setattr RPC 1108 * to return NFS_OK, but not set va_mode. 1109 */ 1110 if (vap->va_mtime.tv_sec == VNOVAL) { 1111 vfs_timestamp(&vap->va_mtime); 1112 vap->va_vaflags |= VA_UTIMES_NULL; 1113 } 1114 if (vap->va_atime.tv_sec == VNOVAL) 1115 vap->va_atime = vap->va_mtime; 1116 return (1); 1117 } 1118 1119 /* 1120 * Map nfsv4 errors to errno.h errors. 1121 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1122 * error should only be returned for the Open, Create and Setattr Ops. 1123 * As such, most calls can just pass in 0 for those arguments. 1124 */ 1125 APPLESTATIC int 1126 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1127 { 1128 struct proc *p; 1129 1130 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1131 return (error); 1132 if (td != NULL) 1133 p = td->td_proc; 1134 else 1135 p = NULL; 1136 switch (error) { 1137 case NFSERR_BADOWNER: 1138 tprintf(p, LOG_INFO, 1139 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1140 uid, gid); 1141 return (EPERM); 1142 case NFSERR_BADNAME: 1143 case NFSERR_BADCHAR: 1144 printf("nfsv4 char/name not handled by server\n"); 1145 return (ENOENT); 1146 case NFSERR_STALECLIENTID: 1147 case NFSERR_STALESTATEID: 1148 case NFSERR_EXPIRED: 1149 case NFSERR_BADSTATEID: 1150 case NFSERR_BADSESSION: 1151 printf("nfsv4 recover err returned %d\n", error); 1152 return (EIO); 1153 case NFSERR_BADHANDLE: 1154 case NFSERR_SERVERFAULT: 1155 case NFSERR_BADTYPE: 1156 case NFSERR_FHEXPIRED: 1157 case NFSERR_RESOURCE: 1158 case NFSERR_MOVED: 1159 case NFSERR_NOFILEHANDLE: 1160 case NFSERR_MINORVERMISMATCH: 1161 case NFSERR_OLDSTATEID: 1162 case NFSERR_BADSEQID: 1163 case NFSERR_LEASEMOVED: 1164 case NFSERR_RECLAIMBAD: 1165 case NFSERR_BADXDR: 1166 case NFSERR_OPILLEGAL: 1167 printf("nfsv4 client/server protocol prob err=%d\n", 1168 error); 1169 return (EIO); 1170 default: 1171 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1172 return (EIO); 1173 }; 1174 } 1175 1176 /* 1177 * Check to see if the process for this owner exists. Return 1 if it doesn't 1178 * and 0 otherwise. 1179 */ 1180 int 1181 nfscl_procdoesntexist(u_int8_t *own) 1182 { 1183 union { 1184 u_int32_t lval; 1185 u_int8_t cval[4]; 1186 } tl; 1187 struct proc *p; 1188 pid_t pid; 1189 int i, ret = 0; 1190 1191 /* For the single open_owner of all 0 bytes, just return 0. */ 1192 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1193 if (own[i] != 0) 1194 break; 1195 if (i == NFSV4CL_LOCKNAMELEN) 1196 return (0); 1197 1198 tl.cval[0] = *own++; 1199 tl.cval[1] = *own++; 1200 tl.cval[2] = *own++; 1201 tl.cval[3] = *own++; 1202 pid = tl.lval; 1203 p = pfind_locked(pid); 1204 if (p == NULL) 1205 return (1); 1206 if (p->p_stats == NULL) { 1207 PROC_UNLOCK(p); 1208 return (0); 1209 } 1210 tl.cval[0] = *own++; 1211 tl.cval[1] = *own++; 1212 tl.cval[2] = *own++; 1213 tl.cval[3] = *own++; 1214 if (tl.lval != p->p_stats->p_start.tv_sec) { 1215 ret = 1; 1216 } else { 1217 tl.cval[0] = *own++; 1218 tl.cval[1] = *own++; 1219 tl.cval[2] = *own++; 1220 tl.cval[3] = *own; 1221 if (tl.lval != p->p_stats->p_start.tv_usec) 1222 ret = 1; 1223 } 1224 PROC_UNLOCK(p); 1225 return (ret); 1226 } 1227 1228 /* 1229 * - nfs pseudo system call for the client 1230 */ 1231 /* 1232 * MPSAFE 1233 */ 1234 static int 1235 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1236 { 1237 struct file *fp; 1238 struct nfscbd_args nfscbdarg; 1239 struct nfsd_nfscbd_args nfscbdarg2; 1240 struct nameidata nd; 1241 struct nfscl_dumpmntopts dumpmntopts; 1242 cap_rights_t rights; 1243 char *buf; 1244 int error; 1245 1246 if (uap->flag & NFSSVC_CBADDSOCK) { 1247 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1248 if (error) 1249 return (error); 1250 /* 1251 * Since we don't know what rights might be required, 1252 * pretend that we need them all. It is better to be too 1253 * careful than too reckless. 1254 */ 1255 error = fget(td, nfscbdarg.sock, 1256 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1257 if (error) 1258 return (error); 1259 if (fp->f_type != DTYPE_SOCKET) { 1260 fdrop(fp, td); 1261 return (EPERM); 1262 } 1263 error = nfscbd_addsock(fp); 1264 fdrop(fp, td); 1265 if (!error && nfscl_enablecallb == 0) { 1266 nfsv4_cbport = nfscbdarg.port; 1267 nfscl_enablecallb = 1; 1268 } 1269 } else if (uap->flag & NFSSVC_NFSCBD) { 1270 if (uap->argp == NULL) 1271 return (EINVAL); 1272 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1273 sizeof(nfscbdarg2)); 1274 if (error) 1275 return (error); 1276 error = nfscbd_nfsd(td, &nfscbdarg2); 1277 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1278 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1279 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1280 dumpmntopts.ndmnt_blen > 1024)) 1281 error = EINVAL; 1282 if (error == 0) 1283 error = nfsrv_lookupfilename(&nd, 1284 dumpmntopts.ndmnt_fname, td); 1285 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1286 "nfs") != 0) { 1287 vput(nd.ni_vp); 1288 error = EINVAL; 1289 } 1290 if (error == 0) { 1291 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1292 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1293 dumpmntopts.ndmnt_blen); 1294 vput(nd.ni_vp); 1295 error = copyout(buf, dumpmntopts.ndmnt_buf, 1296 dumpmntopts.ndmnt_blen); 1297 free(buf, M_TEMP); 1298 } 1299 } else { 1300 error = EINVAL; 1301 } 1302 return (error); 1303 } 1304 1305 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1306 1307 /* 1308 * Called once to initialize data structures... 1309 */ 1310 static int 1311 nfscl_modevent(module_t mod, int type, void *data) 1312 { 1313 int error = 0; 1314 static int loaded = 0; 1315 1316 switch (type) { 1317 case MOD_LOAD: 1318 if (loaded) 1319 return (0); 1320 newnfs_portinit(); 1321 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1322 nfscl_init(); 1323 NFSD_LOCK(); 1324 nfsrvd_cbinit(0); 1325 NFSD_UNLOCK(); 1326 ncl_call_invalcaches = ncl_invalcaches; 1327 nfsd_call_nfscl = nfssvc_nfscl; 1328 loaded = 1; 1329 break; 1330 1331 case MOD_UNLOAD: 1332 if (nfs_numnfscbd != 0) { 1333 error = EBUSY; 1334 break; 1335 } 1336 1337 /* 1338 * XXX: Unloading of nfscl module is unsupported. 1339 */ 1340 #if 0 1341 ncl_call_invalcaches = NULL; 1342 nfsd_call_nfscl = NULL; 1343 /* and get rid of the mutexes */ 1344 mtx_destroy(&ncl_iod_mutex); 1345 loaded = 0; 1346 break; 1347 #else 1348 /* FALLTHROUGH */ 1349 #endif 1350 default: 1351 error = EOPNOTSUPP; 1352 break; 1353 } 1354 return error; 1355 } 1356 static moduledata_t nfscl_mod = { 1357 "nfscl", 1358 nfscl_modevent, 1359 NULL, 1360 }; 1361 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1362 1363 /* So that loader and kldload(2) can find us, wherever we are.. */ 1364 MODULE_VERSION(nfscl, 1); 1365 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1366 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1367 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1368 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1369
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