1 /* $NetBSD: nfs_clport.c,v 1.1.1.1 2013/09/30 07:19:24 dholland 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 255219 2013-09-05 00:09:56Z pjd "); */ 37 __RCSID("$NetBSD: nfs_clport.c,v 1.1.1.1 2013/09/30 07:19:24 dholland Exp $"); 38 39 #include "opt_inet6.h" 40 #include "opt_kdtrace.h" 41 42 #include <sys/capability.h> 43 44 /* 45 * generally, I don't like #includes inside .h files, but it seems to 46 * be the easiest way to handle the port. 47 */ 48 #include <sys/hash.h> 49 #include <fs/nfs/nfsport.h> 50 #include <netinet/if_ether.h> 51 #include <net/if_types.h> 52 53 #include <fs/nfsclient/nfs_kdtrace.h> 54 55 #ifdef KDTRACE_HOOKS 56 dtrace_nfsclient_attrcache_flush_probe_func_t 57 dtrace_nfscl_attrcache_flush_done_probe; 58 uint32_t nfscl_attrcache_flush_done_id; 59 60 dtrace_nfsclient_attrcache_get_hit_probe_func_t 61 dtrace_nfscl_attrcache_get_hit_probe; 62 uint32_t nfscl_attrcache_get_hit_id; 63 64 dtrace_nfsclient_attrcache_get_miss_probe_func_t 65 dtrace_nfscl_attrcache_get_miss_probe; 66 uint32_t nfscl_attrcache_get_miss_id; 67 68 dtrace_nfsclient_attrcache_load_probe_func_t 69 dtrace_nfscl_attrcache_load_done_probe; 70 uint32_t nfscl_attrcache_load_done_id; 71 #endif /* !KDTRACE_HOOKS */ 72 73 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 74 extern struct vop_vector newnfs_vnodeops; 75 extern struct vop_vector newnfs_fifoops; 76 extern uma_zone_t newnfsnode_zone; 77 extern struct buf_ops buf_ops_newnfs; 78 extern int ncl_pbuf_freecnt; 79 extern short nfsv4_cbport; 80 extern int nfscl_enablecallb; 81 extern int nfs_numnfscbd; 82 extern int nfscl_inited; 83 struct mtx nfs_clstate_mutex; 84 struct mtx ncl_iod_mutex; 85 NFSDLOCKMUTEX; 86 87 extern void (*ncl_call_invalcaches)(struct vnode *); 88 89 /* 90 * Comparison function for vfs_hash functions. 91 */ 92 int 93 newnfs_vncmpf(struct vnode *vp, void *arg) 94 { 95 struct nfsfh *nfhp = (struct nfsfh *)arg; 96 struct nfsnode *np = VTONFS(vp); 97 98 if (np->n_fhp->nfh_len != nfhp->nfh_len || 99 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 100 return (1); 101 return (0); 102 } 103 104 /* 105 * Look up a vnode/nfsnode by file handle. 106 * Callers must check for mount points!! 107 * In all cases, a pointer to a 108 * nfsnode structure is returned. 109 * This variant takes a "struct nfsfh *" as second argument and uses 110 * that structure up, either by hanging off the nfsnode or FREEing it. 111 */ 112 int 113 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 114 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 115 void *stuff, int lkflags) 116 { 117 struct nfsnode *np, *dnp; 118 struct vnode *vp, *nvp; 119 struct nfsv4node *newd, *oldd; 120 int error; 121 u_int hash; 122 struct nfsmount *nmp; 123 124 nmp = VFSTONFS(mntp); 125 dnp = VTONFS(dvp); 126 *npp = NULL; 127 128 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 129 130 error = vfs_hash_get(mntp, hash, lkflags, 131 td, &nvp, newnfs_vncmpf, nfhp); 132 if (error == 0 && nvp != NULL) { 133 /* 134 * I believe there is a slight chance that vgonel() could 135 * get called on this vnode between when NFSVOPLOCK() drops 136 * the VI_LOCK() and vget() acquires it again, so that it 137 * hasn't yet had v_usecount incremented. If this were to 138 * happen, the VI_DOOMED flag would be set, so check for 139 * that here. Since we now have the v_usecount incremented, 140 * we should be ok until we vrele() it, if the VI_DOOMED 141 * flag isn't set now. 142 */ 143 VI_LOCK(nvp); 144 if ((nvp->v_iflag & VI_DOOMED)) { 145 VI_UNLOCK(nvp); 146 vrele(nvp); 147 error = ENOENT; 148 } else { 149 VI_UNLOCK(nvp); 150 } 151 } 152 if (error) { 153 FREE((caddr_t)nfhp, M_NFSFH); 154 return (error); 155 } 156 if (nvp != NULL) { 157 np = VTONFS(nvp); 158 /* 159 * For NFSv4, check to see if it is the same name and 160 * replace the name, if it is different. 161 */ 162 oldd = newd = NULL; 163 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 164 nvp->v_type == VREG && 165 (np->n_v4->n4_namelen != cnp->cn_namelen || 166 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 167 cnp->cn_namelen) || 168 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 169 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 170 dnp->n_fhp->nfh_len))) { 171 MALLOC(newd, struct nfsv4node *, 172 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 173 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 174 NFSLOCKNODE(np); 175 if (newd != NULL && np->n_v4 != NULL && 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 oldd = np->n_v4; 183 np->n_v4 = newd; 184 newd = NULL; 185 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 186 np->n_v4->n4_namelen = cnp->cn_namelen; 187 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 188 dnp->n_fhp->nfh_len); 189 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 190 cnp->cn_namelen); 191 } 192 NFSUNLOCKNODE(np); 193 } 194 if (newd != NULL) 195 FREE((caddr_t)newd, M_NFSV4NODE); 196 if (oldd != NULL) 197 FREE((caddr_t)oldd, M_NFSV4NODE); 198 *npp = np; 199 FREE((caddr_t)nfhp, M_NFSFH); 200 return (0); 201 } 202 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 203 204 error = getnewvnode("newnfs", mntp, &newnfs_vnodeops, &nvp); 205 if (error) { 206 uma_zfree(newnfsnode_zone, np); 207 FREE((caddr_t)nfhp, M_NFSFH); 208 return (error); 209 } 210 vp = nvp; 211 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 212 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 213 vp->v_data = np; 214 np->n_vnode = vp; 215 /* 216 * Initialize the mutex even if the vnode is going to be a loser. 217 * This simplifies the logic in reclaim, which can then unconditionally 218 * destroy the mutex (in the case of the loser, or if hash_insert 219 * happened to return an error no special casing is needed). 220 */ 221 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 222 223 /* 224 * Are we getting the root? If so, make sure the vnode flags 225 * are correct 226 */ 227 if ((nfhp->nfh_len == nmp->nm_fhsize) && 228 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 229 if (vp->v_type == VNON) 230 vp->v_type = VDIR; 231 vp->v_vflag |= VV_ROOT; 232 } 233 234 np->n_fhp = nfhp; 235 /* 236 * For NFSv4, we have to attach the directory file handle and 237 * file name, so that Open Ops can be done later. 238 */ 239 if (nmp->nm_flag & NFSMNT_NFSV4) { 240 MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node) 241 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 242 M_WAITOK); 243 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 244 np->n_v4->n4_namelen = cnp->cn_namelen; 245 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 246 dnp->n_fhp->nfh_len); 247 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 248 cnp->cn_namelen); 249 } else { 250 np->n_v4 = NULL; 251 } 252 253 /* 254 * NFS supports recursive and shared locking. 255 */ 256 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 257 VN_LOCK_AREC(vp); 258 VN_LOCK_ASHARE(vp); 259 error = insmntque(vp, mntp); 260 if (error != 0) { 261 *npp = NULL; 262 mtx_destroy(&np->n_mtx); 263 FREE((caddr_t)nfhp, M_NFSFH); 264 if (np->n_v4 != NULL) 265 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 266 uma_zfree(newnfsnode_zone, np); 267 return (error); 268 } 269 error = vfs_hash_insert(vp, hash, lkflags, 270 td, &nvp, newnfs_vncmpf, nfhp); 271 if (error) 272 return (error); 273 if (nvp != NULL) { 274 *npp = VTONFS(nvp); 275 /* vfs_hash_insert() vput()'s the losing vnode */ 276 return (0); 277 } 278 *npp = np; 279 280 return (0); 281 } 282 283 /* 284 * Anothe variant of nfs_nget(). This one is only used by reopen. It 285 * takes almost the same args as nfs_nget(), but only succeeds if an entry 286 * exists in the cache. (Since files should already be "open" with a 287 * vnode ref cnt on the node when reopen calls this, it should always 288 * succeed.) 289 * Also, don't get a vnode lock, since it may already be locked by some 290 * other process that is handling it. This is ok, since all other threads 291 * on the client are blocked by the nfsc_lock being exclusively held by the 292 * caller of this function. 293 */ 294 int 295 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 296 struct thread *td, struct nfsnode **npp) 297 { 298 struct vnode *nvp; 299 u_int hash; 300 struct nfsfh *nfhp; 301 int error; 302 303 *npp = NULL; 304 /* For forced dismounts, just return error. */ 305 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 306 return (EINTR); 307 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 308 M_NFSFH, M_WAITOK); 309 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 310 nfhp->nfh_len = fhsize; 311 312 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 313 314 /* 315 * First, try to get the vnode locked, but don't block for the lock. 316 */ 317 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 318 newnfs_vncmpf, nfhp); 319 if (error == 0 && nvp != NULL) { 320 NFSVOPUNLOCK(nvp, 0); 321 } else if (error == EBUSY) { 322 /* 323 * The LK_EXCLOTHER lock type tells nfs_lock1() to not try 324 * and lock the vnode, but just get a v_usecount on it. 325 * LK_NOWAIT is set so that when vget() returns ENOENT, 326 * vfs_hash_get() fails instead of looping. 327 * If this succeeds, it is safe so long as a vflush() with 328 * FORCECLOSE has not been done. Since the Renew thread is 329 * stopped and the MNTK_UNMOUNTF flag is set before doing 330 * a vflush() with FORCECLOSE, we should be ok here. 331 */ 332 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 333 error = EINTR; 334 else 335 error = vfs_hash_get(mntp, hash, 336 (LK_EXCLOTHER | LK_NOWAIT), td, &nvp, 337 newnfs_vncmpf, nfhp); 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 printf("NULL id\n"); 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 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 670 == (ND_NFSV4 | ND_V4WCCATTR)) { 671 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 672 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 673 NULL, NULL, NULL, NULL, NULL); 674 if (error) 675 return (error); 676 /* 677 * Get rid of Op# and status for next op. 678 */ 679 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 680 if (*++tl) 681 nd->nd_flag |= ND_NOMOREDATA; 682 if (wccflagp != NULL && 683 nfsva.na_vattr.va_mtime.tv_sec != 0) { 684 mtx_lock(&np->n_mtx); 685 *wccflagp = (np->n_mtime.tv_sec == 686 nfsva.na_vattr.va_mtime.tv_sec && 687 np->n_mtime.tv_nsec == 688 nfsva.na_vattr.va_mtime.tv_sec); 689 mtx_unlock(&np->n_mtx); 690 } 691 } 692 nfsmout: 693 return (error); 694 } 695 696 /* 697 * Get postop attributes. 698 */ 699 int 700 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 701 void *stuff) 702 { 703 u_int32_t *tl; 704 int error = 0; 705 706 *retp = 0; 707 if (nd->nd_flag & ND_NOMOREDATA) 708 return (error); 709 if (nd->nd_flag & ND_NFSV3) { 710 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 711 *retp = fxdr_unsigned(int, *tl); 712 } else if (nd->nd_flag & ND_NFSV4) { 713 /* 714 * For NFSv4, the postop attr are at the end, so no point 715 * in looking if nd_repstat != 0. 716 */ 717 if (!nd->nd_repstat) { 718 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 719 if (*(tl + 1)) 720 /* should never happen since nd_repstat != 0 */ 721 nd->nd_flag |= ND_NOMOREDATA; 722 else 723 *retp = 1; 724 } 725 } else if (!nd->nd_repstat) { 726 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 727 *retp = 1; 728 } 729 if (*retp) { 730 error = nfsm_loadattr(nd, nap); 731 if (error) 732 *retp = 0; 733 } 734 nfsmout: 735 return (error); 736 } 737 738 /* 739 * Fill in the setable attributes. The full argument indicates whether 740 * to fill in them all or just mode and time. 741 */ 742 void 743 nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap, 744 struct vnode *vp, int flags, u_int32_t rdev) 745 { 746 u_int32_t *tl; 747 struct nfsv2_sattr *sp; 748 nfsattrbit_t attrbits; 749 750 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 751 case ND_NFSV2: 752 NFSM_BUILD(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 753 if (vap->va_mode == (mode_t)VNOVAL) 754 sp->sa_mode = newnfs_xdrneg1; 755 else 756 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 757 if (vap->va_uid == (uid_t)VNOVAL) 758 sp->sa_uid = newnfs_xdrneg1; 759 else 760 sp->sa_uid = txdr_unsigned(vap->va_uid); 761 if (vap->va_gid == (gid_t)VNOVAL) 762 sp->sa_gid = newnfs_xdrneg1; 763 else 764 sp->sa_gid = txdr_unsigned(vap->va_gid); 765 if (flags & NFSSATTR_SIZE0) 766 sp->sa_size = 0; 767 else if (flags & NFSSATTR_SIZENEG1) 768 sp->sa_size = newnfs_xdrneg1; 769 else if (flags & NFSSATTR_SIZERDEV) 770 sp->sa_size = txdr_unsigned(rdev); 771 else 772 sp->sa_size = txdr_unsigned(vap->va_size); 773 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 774 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 775 break; 776 case ND_NFSV3: 777 if (vap->va_mode != (mode_t)VNOVAL) { 778 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 779 *tl++ = newnfs_true; 780 *tl = txdr_unsigned(vap->va_mode); 781 } else { 782 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 783 *tl = newnfs_false; 784 } 785 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) { 786 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 787 *tl++ = newnfs_true; 788 *tl = txdr_unsigned(vap->va_uid); 789 } else { 790 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 791 *tl = newnfs_false; 792 } 793 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) { 794 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 795 *tl++ = newnfs_true; 796 *tl = txdr_unsigned(vap->va_gid); 797 } else { 798 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 799 *tl = newnfs_false; 800 } 801 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) { 802 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 803 *tl++ = newnfs_true; 804 txdr_hyper(vap->va_size, tl); 805 } else { 806 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 807 *tl = newnfs_false; 808 } 809 if (vap->va_atime.tv_sec != VNOVAL) { 810 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 811 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 812 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 813 txdr_nfsv3time(&vap->va_atime, tl); 814 } else { 815 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 816 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 817 } 818 } else { 819 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 820 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 821 } 822 if (vap->va_mtime.tv_sec != VNOVAL) { 823 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) { 824 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 825 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 826 txdr_nfsv3time(&vap->va_mtime, tl); 827 } else { 828 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 829 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 830 } 831 } else { 832 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 833 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 834 } 835 break; 836 case ND_NFSV4: 837 NFSZERO_ATTRBIT(&attrbits); 838 if (vap->va_mode != (mode_t)VNOVAL) 839 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_MODE); 840 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) 841 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER); 842 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) 843 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP); 844 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) 845 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 846 if (vap->va_atime.tv_sec != VNOVAL) 847 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET); 848 if (vap->va_mtime.tv_sec != VNOVAL) 849 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET); 850 (void) nfsv4_fillattr(nd, vp->v_mount, vp, NULL, vap, NULL, 0, 851 &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0); 852 break; 853 }; 854 } 855 856 /* 857 * nfscl_request() - mostly a wrapper for newnfs_request(). 858 */ 859 int 860 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 861 struct ucred *cred, void *stuff) 862 { 863 int ret, vers; 864 struct nfsmount *nmp; 865 866 nmp = VFSTONFS(vp->v_mount); 867 if (nd->nd_flag & ND_NFSV4) 868 vers = NFS_VER4; 869 else if (nd->nd_flag & ND_NFSV3) 870 vers = NFS_VER3; 871 else 872 vers = NFS_VER2; 873 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 874 NFS_PROG, vers, NULL, 1, NULL, NULL); 875 return (ret); 876 } 877 878 /* 879 * fill in this bsden's variant of statfs using nfsstatfs. 880 */ 881 void 882 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 883 { 884 struct statfs *sbp = (struct statfs *)statfs; 885 886 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 887 sbp->f_bsize = NFS_FABLKSIZE; 888 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 889 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 890 /* 891 * Although sf_abytes is uint64_t and f_bavail is int64_t, 892 * the value after dividing by NFS_FABLKSIZE is small 893 * enough that it will fit in 63bits, so it is ok to 894 * assign it to f_bavail without fear that it will become 895 * negative. 896 */ 897 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 898 sbp->f_files = sfp->sf_tfiles; 899 /* Since f_ffree is int64_t, clip it to 63bits. */ 900 if (sfp->sf_ffiles > INT64_MAX) 901 sbp->f_ffree = INT64_MAX; 902 else 903 sbp->f_ffree = sfp->sf_ffiles; 904 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 905 /* 906 * The type casts to (int32_t) ensure that this code is 907 * compatible with the old NFS client, in that it will 908 * propagate bit31 to the high order bits. This may or may 909 * not be correct for NFSv2, but since it is a legacy 910 * environment, I'd rather retain backwards compatibility. 911 */ 912 sbp->f_bsize = (int32_t)sfp->sf_bsize; 913 sbp->f_blocks = (int32_t)sfp->sf_blocks; 914 sbp->f_bfree = (int32_t)sfp->sf_bfree; 915 sbp->f_bavail = (int32_t)sfp->sf_bavail; 916 sbp->f_files = 0; 917 sbp->f_ffree = 0; 918 } 919 } 920 921 /* 922 * Use the fsinfo stuff to update the mount point. 923 */ 924 void 925 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 926 { 927 928 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 929 fsp->fs_wtpref >= NFS_FABLKSIZE) 930 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 931 ~(NFS_FABLKSIZE - 1); 932 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 933 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 934 if (nmp->nm_wsize == 0) 935 nmp->nm_wsize = fsp->fs_wtmax; 936 } 937 if (nmp->nm_wsize < NFS_FABLKSIZE) 938 nmp->nm_wsize = NFS_FABLKSIZE; 939 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 940 fsp->fs_rtpref >= NFS_FABLKSIZE) 941 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 942 ~(NFS_FABLKSIZE - 1); 943 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 944 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 945 if (nmp->nm_rsize == 0) 946 nmp->nm_rsize = fsp->fs_rtmax; 947 } 948 if (nmp->nm_rsize < NFS_FABLKSIZE) 949 nmp->nm_rsize = NFS_FABLKSIZE; 950 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 951 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 952 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 953 ~(NFS_DIRBLKSIZ - 1); 954 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 955 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 956 if (nmp->nm_readdirsize == 0) 957 nmp->nm_readdirsize = fsp->fs_rtmax; 958 } 959 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 960 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 961 if (fsp->fs_maxfilesize > 0 && 962 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 963 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 964 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 965 nmp->nm_state |= NFSSTA_GOTFSINFO; 966 } 967 968 /* 969 * Get a pointer to my IP addrress and return it. 970 * Return NULL if you can't find one. 971 */ 972 u_int8_t * 973 nfscl_getmyip(struct nfsmount *nmp, int *isinet6p) 974 { 975 struct sockaddr_in sad, *sin; 976 struct rtentry *rt; 977 u_int8_t *retp = NULL; 978 static struct in_addr laddr; 979 980 *isinet6p = 0; 981 /* 982 * Loop up a route for the destination address. 983 */ 984 if (nmp->nm_nam->sa_family == AF_INET) { 985 bzero(&sad, sizeof (sad)); 986 sin = (struct sockaddr_in *)nmp->nm_nam; 987 sad.sin_family = AF_INET; 988 sad.sin_len = sizeof (struct sockaddr_in); 989 sad.sin_addr.s_addr = sin->sin_addr.s_addr; 990 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 991 rt = rtalloc1_fib((struct sockaddr *)&sad, 0, 0UL, 992 curthread->td_proc->p_fibnum); 993 if (rt != NULL) { 994 if (rt->rt_ifp != NULL && 995 rt->rt_ifa != NULL && 996 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) && 997 rt->rt_ifa->ifa_addr->sa_family == AF_INET) { 998 sin = (struct sockaddr_in *) 999 rt->rt_ifa->ifa_addr; 1000 laddr.s_addr = sin->sin_addr.s_addr; 1001 retp = (u_int8_t *)&laddr; 1002 } 1003 RTFREE_LOCKED(rt); 1004 } 1005 CURVNET_RESTORE(); 1006 #ifdef INET6 1007 } else if (nmp->nm_nam->sa_family == AF_INET6) { 1008 struct sockaddr_in6 sad6, *sin6; 1009 static struct in6_addr laddr6; 1010 1011 bzero(&sad6, sizeof (sad6)); 1012 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 1013 sad6.sin6_family = AF_INET6; 1014 sad6.sin6_len = sizeof (struct sockaddr_in6); 1015 sad6.sin6_addr = sin6->sin6_addr; 1016 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 1017 rt = rtalloc1_fib((struct sockaddr *)&sad6, 0, 0UL, 1018 curthread->td_proc->p_fibnum); 1019 if (rt != NULL) { 1020 if (rt->rt_ifp != NULL && 1021 rt->rt_ifa != NULL && 1022 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) && 1023 rt->rt_ifa->ifa_addr->sa_family == AF_INET6) { 1024 sin6 = (struct sockaddr_in6 *) 1025 rt->rt_ifa->ifa_addr; 1026 laddr6 = sin6->sin6_addr; 1027 retp = (u_int8_t *)&laddr6; 1028 *isinet6p = 1; 1029 } 1030 RTFREE_LOCKED(rt); 1031 } 1032 CURVNET_RESTORE(); 1033 #endif 1034 } 1035 return (retp); 1036 } 1037 1038 /* 1039 * Copy NFS uid, gids from the cred structure. 1040 */ 1041 void 1042 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 1043 { 1044 int i; 1045 1046 KASSERT(cr->cr_ngroups >= 0, 1047 ("newnfs_copyincred: negative cr_ngroups")); 1048 nfscr->nfsc_uid = cr->cr_uid; 1049 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1050 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1051 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1052 } 1053 1054 1055 /* 1056 * Do any client specific initialization. 1057 */ 1058 void 1059 nfscl_init(void) 1060 { 1061 static int inited = 0; 1062 1063 if (inited) 1064 return; 1065 inited = 1; 1066 nfscl_inited = 1; 1067 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1068 } 1069 1070 /* 1071 * Check each of the attributes to be set, to ensure they aren't already 1072 * the correct value. Disable setting ones already correct. 1073 */ 1074 int 1075 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1076 { 1077 1078 if (vap->va_mode != (mode_t)VNOVAL) { 1079 if (vap->va_mode == nvap->na_mode) 1080 vap->va_mode = (mode_t)VNOVAL; 1081 } 1082 if (vap->va_uid != (uid_t)VNOVAL) { 1083 if (vap->va_uid == nvap->na_uid) 1084 vap->va_uid = (uid_t)VNOVAL; 1085 } 1086 if (vap->va_gid != (gid_t)VNOVAL) { 1087 if (vap->va_gid == nvap->na_gid) 1088 vap->va_gid = (gid_t)VNOVAL; 1089 } 1090 if (vap->va_size != VNOVAL) { 1091 if (vap->va_size == nvap->na_size) 1092 vap->va_size = VNOVAL; 1093 } 1094 1095 /* 1096 * We are normally called with only a partially initialized 1097 * VAP. Since the NFSv3 spec says that server may use the 1098 * file attributes to store the verifier, the spec requires 1099 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1100 * in atime, but we can't really assume that all servers will 1101 * so we ensure that our SETATTR sets both atime and mtime. 1102 */ 1103 if (vap->va_mtime.tv_sec == VNOVAL) 1104 vfs_timestamp(&vap->va_mtime); 1105 if (vap->va_atime.tv_sec == VNOVAL) 1106 vap->va_atime = vap->va_mtime; 1107 return (1); 1108 } 1109 1110 /* 1111 * Map nfsv4 errors to errno.h errors. 1112 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1113 * error should only be returned for the Open, Create and Setattr Ops. 1114 * As such, most calls can just pass in 0 for those arguments. 1115 */ 1116 APPLESTATIC int 1117 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1118 { 1119 struct proc *p; 1120 1121 if (error < 10000) 1122 return (error); 1123 if (td != NULL) 1124 p = td->td_proc; 1125 else 1126 p = NULL; 1127 switch (error) { 1128 case NFSERR_BADOWNER: 1129 tprintf(p, LOG_INFO, 1130 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1131 uid, gid); 1132 return (EPERM); 1133 case NFSERR_BADNAME: 1134 case NFSERR_BADCHAR: 1135 printf("nfsv4 char/name not handled by server\n"); 1136 return (ENOENT); 1137 case NFSERR_STALECLIENTID: 1138 case NFSERR_STALESTATEID: 1139 case NFSERR_EXPIRED: 1140 case NFSERR_BADSTATEID: 1141 case NFSERR_BADSESSION: 1142 printf("nfsv4 recover err returned %d\n", error); 1143 return (EIO); 1144 case NFSERR_BADHANDLE: 1145 case NFSERR_SERVERFAULT: 1146 case NFSERR_BADTYPE: 1147 case NFSERR_FHEXPIRED: 1148 case NFSERR_RESOURCE: 1149 case NFSERR_MOVED: 1150 case NFSERR_NOFILEHANDLE: 1151 case NFSERR_MINORVERMISMATCH: 1152 case NFSERR_OLDSTATEID: 1153 case NFSERR_BADSEQID: 1154 case NFSERR_LEASEMOVED: 1155 case NFSERR_RECLAIMBAD: 1156 case NFSERR_BADXDR: 1157 case NFSERR_OPILLEGAL: 1158 printf("nfsv4 client/server protocol prob err=%d\n", 1159 error); 1160 return (EIO); 1161 default: 1162 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1163 return (EIO); 1164 }; 1165 } 1166 1167 /* 1168 * Check to see if the process for this owner exists. Return 1 if it doesn't 1169 * and 0 otherwise. 1170 */ 1171 int 1172 nfscl_procdoesntexist(u_int8_t *own) 1173 { 1174 union { 1175 u_int32_t lval; 1176 u_int8_t cval[4]; 1177 } tl; 1178 struct proc *p; 1179 pid_t pid; 1180 int ret = 0; 1181 1182 tl.cval[0] = *own++; 1183 tl.cval[1] = *own++; 1184 tl.cval[2] = *own++; 1185 tl.cval[3] = *own++; 1186 pid = tl.lval; 1187 p = pfind_locked(pid); 1188 if (p == NULL) 1189 return (1); 1190 if (p->p_stats == NULL) { 1191 PROC_UNLOCK(p); 1192 return (0); 1193 } 1194 tl.cval[0] = *own++; 1195 tl.cval[1] = *own++; 1196 tl.cval[2] = *own++; 1197 tl.cval[3] = *own++; 1198 if (tl.lval != p->p_stats->p_start.tv_sec) { 1199 ret = 1; 1200 } else { 1201 tl.cval[0] = *own++; 1202 tl.cval[1] = *own++; 1203 tl.cval[2] = *own++; 1204 tl.cval[3] = *own; 1205 if (tl.lval != p->p_stats->p_start.tv_usec) 1206 ret = 1; 1207 } 1208 PROC_UNLOCK(p); 1209 return (ret); 1210 } 1211 1212 /* 1213 * - nfs pseudo system call for the client 1214 */ 1215 /* 1216 * MPSAFE 1217 */ 1218 static int 1219 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1220 { 1221 struct file *fp; 1222 struct nfscbd_args nfscbdarg; 1223 struct nfsd_nfscbd_args nfscbdarg2; 1224 struct nameidata nd; 1225 struct nfscl_dumpmntopts dumpmntopts; 1226 cap_rights_t rights; 1227 char *buf; 1228 int error; 1229 1230 if (uap->flag & NFSSVC_CBADDSOCK) { 1231 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1232 if (error) 1233 return (error); 1234 /* 1235 * Since we don't know what rights might be required, 1236 * pretend that we need them all. It is better to be too 1237 * careful than too reckless. 1238 */ 1239 error = fget(td, nfscbdarg.sock, 1240 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1241 if (error) 1242 return (error); 1243 if (fp->f_type != DTYPE_SOCKET) { 1244 fdrop(fp, td); 1245 return (EPERM); 1246 } 1247 error = nfscbd_addsock(fp); 1248 fdrop(fp, td); 1249 if (!error && nfscl_enablecallb == 0) { 1250 nfsv4_cbport = nfscbdarg.port; 1251 nfscl_enablecallb = 1; 1252 } 1253 } else if (uap->flag & NFSSVC_NFSCBD) { 1254 if (uap->argp == NULL) 1255 return (EINVAL); 1256 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1257 sizeof(nfscbdarg2)); 1258 if (error) 1259 return (error); 1260 error = nfscbd_nfsd(td, &nfscbdarg2); 1261 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1262 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1263 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1264 dumpmntopts.ndmnt_blen > 1024)) 1265 error = EINVAL; 1266 if (error == 0) 1267 error = nfsrv_lookupfilename(&nd, 1268 dumpmntopts.ndmnt_fname, td); 1269 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1270 "nfs") != 0) { 1271 vput(nd.ni_vp); 1272 error = EINVAL; 1273 } 1274 if (error == 0) { 1275 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1276 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1277 dumpmntopts.ndmnt_blen); 1278 vput(nd.ni_vp); 1279 error = copyout(buf, dumpmntopts.ndmnt_buf, 1280 dumpmntopts.ndmnt_blen); 1281 free(buf, M_TEMP); 1282 } 1283 } else { 1284 error = EINVAL; 1285 } 1286 return (error); 1287 } 1288 1289 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1290 1291 /* 1292 * Called once to initialize data structures... 1293 */ 1294 static int 1295 nfscl_modevent(module_t mod, int type, void *data) 1296 { 1297 int error = 0; 1298 static int loaded = 0; 1299 1300 switch (type) { 1301 case MOD_LOAD: 1302 if (loaded) 1303 return (0); 1304 newnfs_portinit(); 1305 mtx_init(&nfs_clstate_mutex, "nfs_clstate_mutex", NULL, 1306 MTX_DEF); 1307 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1308 nfscl_init(); 1309 NFSD_LOCK(); 1310 nfsrvd_cbinit(0); 1311 NFSD_UNLOCK(); 1312 ncl_call_invalcaches = ncl_invalcaches; 1313 nfsd_call_nfscl = nfssvc_nfscl; 1314 loaded = 1; 1315 break; 1316 1317 case MOD_UNLOAD: 1318 if (nfs_numnfscbd != 0) { 1319 error = EBUSY; 1320 break; 1321 } 1322 1323 /* 1324 * XXX: Unloading of nfscl module is unsupported. 1325 */ 1326 #if 0 1327 ncl_call_invalcaches = NULL; 1328 nfsd_call_nfscl = NULL; 1329 /* and get rid of the mutexes */ 1330 mtx_destroy(&nfs_clstate_mutex); 1331 mtx_destroy(&ncl_iod_mutex); 1332 loaded = 0; 1333 break; 1334 #else 1335 /* FALLTHROUGH */ 1336 #endif 1337 default: 1338 error = EOPNOTSUPP; 1339 break; 1340 } 1341 return error; 1342 } 1343 static moduledata_t nfscl_mod = { 1344 "nfscl", 1345 nfscl_modevent, 1346 NULL, 1347 }; 1348 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1349 1350 /* So that loader and kldload(2) can find us, wherever we are.. */ 1351 MODULE_VERSION(nfscl, 1); 1352 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1353 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1354 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1355 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1356 1357