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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/8.3/sys/fs/nfsclient/nfs_clport.c 231332 2012-02-10 04:01:17Z rmacklem $"); 36 37 #include "opt_inet6.h" 38 39 /* 40 * generally, I don't like #includes inside .h files, but it seems to 41 * be the easiest way to handle the port. 42 */ 43 #include <sys/hash.h> 44 #include <fs/nfs/nfsport.h> 45 #include <netinet/if_ether.h> 46 #include <net/if_types.h> 47 48 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 49 extern struct vop_vector newnfs_vnodeops; 50 extern struct vop_vector newnfs_fifoops; 51 extern uma_zone_t newnfsnode_zone; 52 extern struct buf_ops buf_ops_newnfs; 53 extern int ncl_pbuf_freecnt; 54 extern short nfsv4_cbport; 55 extern int nfscl_enablecallb; 56 extern int nfs_numnfscbd; 57 extern int nfscl_inited; 58 struct mtx nfs_clstate_mutex; 59 struct mtx ncl_iod_mutex; 60 NFSDLOCKMUTEX; 61 62 extern void (*ncl_call_invalcaches)(struct vnode *); 63 64 /* 65 * Comparison function for vfs_hash functions. 66 */ 67 int 68 newnfs_vncmpf(struct vnode *vp, void *arg) 69 { 70 struct nfsfh *nfhp = (struct nfsfh *)arg; 71 struct nfsnode *np = VTONFS(vp); 72 73 if (np->n_fhp->nfh_len != nfhp->nfh_len || 74 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len)) 75 return (1); 76 return (0); 77 } 78 79 /* 80 * Look up a vnode/nfsnode by file handle. 81 * Callers must check for mount points!! 82 * In all cases, a pointer to a 83 * nfsnode structure is returned. 84 * This variant takes a "struct nfsfh *" as second argument and uses 85 * that structure up, either by hanging off the nfsnode or FREEing it. 86 */ 87 int 88 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp, 89 struct componentname *cnp, struct thread *td, struct nfsnode **npp, 90 void *stuff, int lkflags) 91 { 92 struct nfsnode *np, *dnp; 93 struct vnode *vp, *nvp; 94 struct nfsv4node *newd, *oldd; 95 int error; 96 u_int hash; 97 struct nfsmount *nmp; 98 99 nmp = VFSTONFS(mntp); 100 dnp = VTONFS(dvp); 101 *npp = NULL; 102 103 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT); 104 105 error = vfs_hash_get(mntp, hash, lkflags, 106 td, &nvp, newnfs_vncmpf, nfhp); 107 if (error == 0 && nvp != NULL) { 108 /* 109 * I believe there is a slight chance that vgonel() could 110 * get called on this vnode between when NFSVOPLOCK() drops 111 * the VI_LOCK() and vget() acquires it again, so that it 112 * hasn't yet had v_usecount incremented. If this were to 113 * happen, the VI_DOOMED flag would be set, so check for 114 * that here. Since we now have the v_usecount incremented, 115 * we should be ok until we vrele() it, if the VI_DOOMED 116 * flag isn't set now. 117 */ 118 VI_LOCK(nvp); 119 if ((nvp->v_iflag & VI_DOOMED)) { 120 VI_UNLOCK(nvp); 121 vrele(nvp); 122 error = ENOENT; 123 } else { 124 VI_UNLOCK(nvp); 125 } 126 } 127 if (error) { 128 FREE((caddr_t)nfhp, M_NFSFH); 129 return (error); 130 } 131 if (nvp != NULL) { 132 np = VTONFS(nvp); 133 /* 134 * For NFSv4, check to see if it is the same name and 135 * replace the name, if it is different. 136 */ 137 oldd = newd = NULL; 138 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL && 139 nvp->v_type == VREG && 140 (np->n_v4->n4_namelen != cnp->cn_namelen || 141 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 142 cnp->cn_namelen) || 143 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 144 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 145 dnp->n_fhp->nfh_len))) { 146 MALLOC(newd, struct nfsv4node *, 147 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len + 148 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK); 149 NFSLOCKNODE(np); 150 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG 151 && (np->n_v4->n4_namelen != cnp->cn_namelen || 152 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 153 cnp->cn_namelen) || 154 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 155 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 156 dnp->n_fhp->nfh_len))) { 157 oldd = np->n_v4; 158 np->n_v4 = newd; 159 newd = NULL; 160 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 161 np->n_v4->n4_namelen = cnp->cn_namelen; 162 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 163 dnp->n_fhp->nfh_len); 164 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 165 cnp->cn_namelen); 166 } 167 NFSUNLOCKNODE(np); 168 } 169 if (newd != NULL) 170 FREE((caddr_t)newd, M_NFSV4NODE); 171 if (oldd != NULL) 172 FREE((caddr_t)oldd, M_NFSV4NODE); 173 *npp = np; 174 FREE((caddr_t)nfhp, M_NFSFH); 175 return (0); 176 } 177 178 /* 179 * Allocate before getnewvnode since doing so afterward 180 * might cause a bogus v_data pointer to get dereferenced 181 * elsewhere if zalloc should block. 182 */ 183 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO); 184 185 error = getnewvnode("newnfs", mntp, &newnfs_vnodeops, &nvp); 186 if (error) { 187 uma_zfree(newnfsnode_zone, np); 188 FREE((caddr_t)nfhp, M_NFSFH); 189 return (error); 190 } 191 vp = nvp; 192 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); 193 vp->v_bufobj.bo_ops = &buf_ops_newnfs; 194 vp->v_data = np; 195 np->n_vnode = vp; 196 /* 197 * Initialize the mutex even if the vnode is going to be a loser. 198 * This simplifies the logic in reclaim, which can then unconditionally 199 * destroy the mutex (in the case of the loser, or if hash_insert 200 * happened to return an error no special casing is needed). 201 */ 202 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK); 203 204 /* 205 * Are we getting the root? If so, make sure the vnode flags 206 * are correct 207 */ 208 if ((nfhp->nfh_len == nmp->nm_fhsize) && 209 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) { 210 if (vp->v_type == VNON) 211 vp->v_type = VDIR; 212 vp->v_vflag |= VV_ROOT; 213 } 214 215 np->n_fhp = nfhp; 216 /* 217 * For NFSv4, we have to attach the directory file handle and 218 * file name, so that Open Ops can be done later. 219 */ 220 if (nmp->nm_flag & NFSMNT_NFSV4) { 221 MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node) 222 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE, 223 M_WAITOK); 224 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 225 np->n_v4->n4_namelen = cnp->cn_namelen; 226 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 227 dnp->n_fhp->nfh_len); 228 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4), 229 cnp->cn_namelen); 230 } else { 231 np->n_v4 = NULL; 232 } 233 234 /* 235 * NFS supports recursive and shared locking. 236 */ 237 VN_LOCK_AREC(vp); 238 VN_LOCK_ASHARE(vp); 239 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 240 error = insmntque(vp, mntp); 241 if (error != 0) { 242 *npp = NULL; 243 mtx_destroy(&np->n_mtx); 244 FREE((caddr_t)nfhp, M_NFSFH); 245 if (np->n_v4 != NULL) 246 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 247 uma_zfree(newnfsnode_zone, np); 248 return (error); 249 } 250 error = vfs_hash_insert(vp, hash, lkflags, 251 td, &nvp, newnfs_vncmpf, nfhp); 252 if (error) 253 return (error); 254 if (nvp != NULL) { 255 *npp = VTONFS(nvp); 256 /* vfs_hash_insert() vput()'s the losing vnode */ 257 return (0); 258 } 259 *npp = np; 260 261 return (0); 262 } 263 264 /* 265 * Anothe variant of nfs_nget(). This one is only used by reopen. It 266 * takes almost the same args as nfs_nget(), but only succeeds if an entry 267 * exists in the cache. (Since files should already be "open" with a 268 * vnode ref cnt on the node when reopen calls this, it should always 269 * succeed.) 270 * Also, don't get a vnode lock, since it may already be locked by some 271 * other process that is handling it. This is ok, since all other threads 272 * on the client are blocked by the nfsc_lock being exclusively held by the 273 * caller of this function. 274 */ 275 int 276 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize, 277 struct thread *td, struct nfsnode **npp) 278 { 279 struct vnode *nvp; 280 u_int hash; 281 struct nfsfh *nfhp; 282 int error; 283 284 *npp = NULL; 285 /* For forced dismounts, just return error. */ 286 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 287 return (EINTR); 288 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize, 289 M_NFSFH, M_WAITOK); 290 bcopy(fhp, &nfhp->nfh_fh[0], fhsize); 291 nfhp->nfh_len = fhsize; 292 293 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT); 294 295 /* 296 * First, try to get the vnode locked, but don't block for the lock. 297 */ 298 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp, 299 newnfs_vncmpf, nfhp); 300 if (error == 0 && nvp != NULL) { 301 NFSVOPUNLOCK(nvp, 0); 302 } else if (error == EBUSY) { 303 /* 304 * The LK_EXCLOTHER lock type tells nfs_lock1() to not try 305 * and lock the vnode, but just get a v_usecount on it. 306 * LK_NOWAIT is set so that when vget() returns ENOENT, 307 * vfs_hash_get() fails instead of looping. 308 * If this succeeds, it is safe so long as a vflush() with 309 * FORCECLOSE has not been done. Since the Renew thread is 310 * stopped and the MNTK_UNMOUNTF flag is set before doing 311 * a vflush() with FORCECLOSE, we should be ok here. 312 */ 313 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF)) 314 error = EINTR; 315 else 316 error = vfs_hash_get(mntp, hash, 317 (LK_EXCLOTHER | LK_NOWAIT), td, &nvp, 318 newnfs_vncmpf, nfhp); 319 } 320 FREE(nfhp, M_NFSFH); 321 if (error) 322 return (error); 323 if (nvp != NULL) { 324 *npp = VTONFS(nvp); 325 return (0); 326 } 327 return (EINVAL); 328 } 329 330 /* 331 * Load the attribute cache (that lives in the nfsnode entry) with 332 * the attributes of the second argument and 333 * Iff vaper not NULL 334 * copy the attributes to *vaper 335 * Similar to nfs_loadattrcache(), except the attributes are passed in 336 * instead of being parsed out of the mbuf list. 337 */ 338 int 339 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper, 340 void *stuff, int writeattr, int dontshrink) 341 { 342 struct vnode *vp = *vpp; 343 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper; 344 struct nfsnode *np; 345 struct nfsmount *nmp; 346 struct timespec mtime_save; 347 348 /* 349 * If v_type == VNON it is a new node, so fill in the v_type, 350 * n_mtime fields. Check to see if it represents a special 351 * device, and if so, check for a possible alias. Once the 352 * correct vnode has been obtained, fill in the rest of the 353 * information. 354 */ 355 np = VTONFS(vp); 356 NFSLOCKNODE(np); 357 if (vp->v_type != nvap->va_type) { 358 vp->v_type = nvap->va_type; 359 if (vp->v_type == VFIFO) 360 vp->v_op = &newnfs_fifoops; 361 np->n_mtime = nvap->va_mtime; 362 } 363 nmp = VFSTONFS(vp->v_mount); 364 vap = &np->n_vattr.na_vattr; 365 mtime_save = vap->va_mtime; 366 if (writeattr) { 367 np->n_vattr.na_filerev = nap->na_filerev; 368 np->n_vattr.na_size = nap->na_size; 369 np->n_vattr.na_mtime = nap->na_mtime; 370 np->n_vattr.na_ctime = nap->na_ctime; 371 np->n_vattr.na_fsid = nap->na_fsid; 372 np->n_vattr.na_mode = nap->na_mode; 373 } else { 374 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr, 375 sizeof (struct nfsvattr)); 376 } 377 378 /* 379 * For NFSv4, if the node's fsid is not equal to the mount point's 380 * fsid, return the low order 32bits of the node's fsid. This 381 * allows getcwd(3) to work. There is a chance that the fsid might 382 * be the same as a local fs, but since this is in an NFS mount 383 * point, I don't think that will cause any problems? 384 */ 385 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) && 386 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] || 387 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) { 388 /* 389 * va_fsid needs to be set to some value derived from 390 * np->n_vattr.na_filesid that is not equal 391 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes 392 * from the value used for the top level server volume 393 * in the mounted subtree. 394 */ 395 if (vp->v_mount->mnt_stat.f_fsid.val[0] != 396 (uint32_t)np->n_vattr.na_filesid[0]) 397 vap->va_fsid = (uint32_t)np->n_vattr.na_filesid[0]; 398 else 399 vap->va_fsid = (uint32_t)hash32_buf( 400 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0); 401 } else 402 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 403 np->n_attrstamp = time_second; 404 if (vap->va_size != np->n_size) { 405 if (vap->va_type == VREG) { 406 if (dontshrink && vap->va_size < np->n_size) { 407 /* 408 * We've been told not to shrink the file; 409 * zero np->n_attrstamp to indicate that 410 * the attributes are stale. 411 */ 412 vap->va_size = np->n_size; 413 np->n_attrstamp = 0; 414 } else if (np->n_flag & NMODIFIED) { 415 /* 416 * We've modified the file: Use the larger 417 * of our size, and the server's size. 418 */ 419 if (vap->va_size < np->n_size) { 420 vap->va_size = np->n_size; 421 } else { 422 np->n_size = vap->va_size; 423 np->n_flag |= NSIZECHANGED; 424 } 425 } else { 426 np->n_size = vap->va_size; 427 np->n_flag |= NSIZECHANGED; 428 } 429 vnode_pager_setsize(vp, np->n_size); 430 } else { 431 np->n_size = vap->va_size; 432 } 433 } 434 /* 435 * The following checks are added to prevent a race between (say) 436 * a READDIR+ and a WRITE. 437 * READDIR+, WRITE requests sent out. 438 * READDIR+ resp, WRITE resp received on client. 439 * However, the WRITE resp was handled before the READDIR+ resp 440 * causing the post op attrs from the write to be loaded first 441 * and the attrs from the READDIR+ to be loaded later. If this 442 * happens, we have stale attrs loaded into the attrcache. 443 * We detect this by for the mtime moving back. We invalidate the 444 * attrcache when this happens. 445 */ 446 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) 447 /* Size changed or mtime went backwards */ 448 np->n_attrstamp = 0; 449 if (vaper != NULL) { 450 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 451 if (np->n_flag & NCHG) { 452 if (np->n_flag & NACC) 453 vaper->va_atime = np->n_atim; 454 if (np->n_flag & NUPD) 455 vaper->va_mtime = np->n_mtim; 456 } 457 } 458 NFSUNLOCKNODE(np); 459 return (0); 460 } 461 462 /* 463 * Fill in the client id name. For these bytes: 464 * 1 - they must be unique 465 * 2 - they should be persistent across client reboots 466 * 1 is more critical than 2 467 * Use the mount point's unique id plus either the uuid or, if that 468 * isn't set, random junk. 469 */ 470 void 471 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen) 472 { 473 int uuidlen; 474 475 /* 476 * First, put in the 64bit mount point identifier. 477 */ 478 if (idlen >= sizeof (u_int64_t)) { 479 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t)); 480 cp += sizeof (u_int64_t); 481 idlen -= sizeof (u_int64_t); 482 } 483 484 /* 485 * If uuid is non-zero length, use it. 486 */ 487 uuidlen = strlen(uuid); 488 if (uuidlen > 0 && idlen >= uuidlen) { 489 NFSBCOPY(uuid, cp, uuidlen); 490 cp += uuidlen; 491 idlen -= uuidlen; 492 } 493 494 /* 495 * This only normally happens if the uuid isn't set. 496 */ 497 while (idlen > 0) { 498 *cp++ = (u_int8_t)(arc4random() % 256); 499 idlen--; 500 } 501 } 502 503 /* 504 * Fill in a lock owner name. For now, pid + the process's creation time. 505 */ 506 void 507 nfscl_filllockowner(void *id, u_int8_t *cp, int flags) 508 { 509 union { 510 u_int32_t lval; 511 u_int8_t cval[4]; 512 } tl; 513 struct proc *p; 514 515 if (id == NULL) { 516 printf("NULL id\n"); 517 bzero(cp, NFSV4CL_LOCKNAMELEN); 518 return; 519 } 520 if ((flags & F_POSIX) != 0) { 521 p = (struct proc *)id; 522 tl.lval = p->p_pid; 523 *cp++ = tl.cval[0]; 524 *cp++ = tl.cval[1]; 525 *cp++ = tl.cval[2]; 526 *cp++ = tl.cval[3]; 527 tl.lval = p->p_stats->p_start.tv_sec; 528 *cp++ = tl.cval[0]; 529 *cp++ = tl.cval[1]; 530 *cp++ = tl.cval[2]; 531 *cp++ = tl.cval[3]; 532 tl.lval = p->p_stats->p_start.tv_usec; 533 *cp++ = tl.cval[0]; 534 *cp++ = tl.cval[1]; 535 *cp++ = tl.cval[2]; 536 *cp = tl.cval[3]; 537 } else if ((flags & F_FLOCK) != 0) { 538 bcopy(&id, cp, sizeof(id)); 539 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id)); 540 } else { 541 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n"); 542 bzero(cp, NFSV4CL_LOCKNAMELEN); 543 } 544 } 545 546 /* 547 * Find the parent process for the thread passed in as an argument. 548 * If none exists, return NULL, otherwise return a thread for the parent. 549 * (Can be any of the threads, since it is only used for td->td_proc.) 550 */ 551 NFSPROC_T * 552 nfscl_getparent(struct thread *td) 553 { 554 struct proc *p; 555 struct thread *ptd; 556 557 if (td == NULL) 558 return (NULL); 559 p = td->td_proc; 560 if (p->p_pid == 0) 561 return (NULL); 562 p = p->p_pptr; 563 if (p == NULL) 564 return (NULL); 565 ptd = TAILQ_FIRST(&p->p_threads); 566 return (ptd); 567 } 568 569 /* 570 * Start up the renew kernel thread. 571 */ 572 static void 573 start_nfscl(void *arg) 574 { 575 struct nfsclclient *clp; 576 struct thread *td; 577 578 clp = (struct nfsclclient *)arg; 579 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads); 580 nfscl_renewthread(clp, td); 581 kproc_exit(0); 582 } 583 584 void 585 nfscl_start_renewthread(struct nfsclclient *clp) 586 { 587 588 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0, 589 "nfscl"); 590 } 591 592 /* 593 * Handle wcc_data. 594 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr 595 * as the first Op after PutFH. 596 * (For NFSv4, the postop attributes are after the Op, so they can't be 597 * parsed here. A separate call to nfscl_postop_attr() is required.) 598 */ 599 int 600 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp, 601 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff) 602 { 603 u_int32_t *tl; 604 struct nfsnode *np = VTONFS(vp); 605 struct nfsvattr nfsva; 606 int error = 0; 607 608 if (wccflagp != NULL) 609 *wccflagp = 0; 610 if (nd->nd_flag & ND_NFSV3) { 611 *flagp = 0; 612 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 613 if (*tl == newnfs_true) { 614 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 615 if (wccflagp != NULL) { 616 mtx_lock(&np->n_mtx); 617 *wccflagp = (np->n_mtime.tv_sec == 618 fxdr_unsigned(u_int32_t, *(tl + 2)) && 619 np->n_mtime.tv_nsec == 620 fxdr_unsigned(u_int32_t, *(tl + 3))); 621 mtx_unlock(&np->n_mtx); 622 } 623 } 624 error = nfscl_postop_attr(nd, nap, flagp, stuff); 625 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) 626 == (ND_NFSV4 | ND_V4WCCATTR)) { 627 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL, 628 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, 629 NULL, NULL, NULL, NULL, NULL); 630 if (error) 631 return (error); 632 /* 633 * Get rid of Op# and status for next op. 634 */ 635 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 636 if (*++tl) 637 nd->nd_flag |= ND_NOMOREDATA; 638 if (wccflagp != NULL && 639 nfsva.na_vattr.va_mtime.tv_sec != 0) { 640 mtx_lock(&np->n_mtx); 641 *wccflagp = (np->n_mtime.tv_sec == 642 nfsva.na_vattr.va_mtime.tv_sec && 643 np->n_mtime.tv_nsec == 644 nfsva.na_vattr.va_mtime.tv_sec); 645 mtx_unlock(&np->n_mtx); 646 } 647 } 648 nfsmout: 649 return (error); 650 } 651 652 /* 653 * Get postop attributes. 654 */ 655 int 656 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp, 657 void *stuff) 658 { 659 u_int32_t *tl; 660 int error = 0; 661 662 *retp = 0; 663 if (nd->nd_flag & ND_NOMOREDATA) 664 return (error); 665 if (nd->nd_flag & ND_NFSV3) { 666 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 667 *retp = fxdr_unsigned(int, *tl); 668 } else if (nd->nd_flag & ND_NFSV4) { 669 /* 670 * For NFSv4, the postop attr are at the end, so no point 671 * in looking if nd_repstat != 0. 672 */ 673 if (!nd->nd_repstat) { 674 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 675 if (*(tl + 1)) 676 /* should never happen since nd_repstat != 0 */ 677 nd->nd_flag |= ND_NOMOREDATA; 678 else 679 *retp = 1; 680 } 681 } else if (!nd->nd_repstat) { 682 /* For NFSv2, the attributes are here iff nd_repstat == 0 */ 683 *retp = 1; 684 } 685 if (*retp) { 686 error = nfsm_loadattr(nd, nap); 687 if (error) 688 *retp = 0; 689 } 690 nfsmout: 691 return (error); 692 } 693 694 /* 695 * Fill in the setable attributes. The full argument indicates whether 696 * to fill in them all or just mode and time. 697 */ 698 void 699 nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap, 700 struct vnode *vp, int flags, u_int32_t rdev) 701 { 702 u_int32_t *tl; 703 struct nfsv2_sattr *sp; 704 nfsattrbit_t attrbits; 705 struct timeval curtime; 706 707 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 708 case ND_NFSV2: 709 NFSM_BUILD(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 710 if (vap->va_mode == (mode_t)VNOVAL) 711 sp->sa_mode = newnfs_xdrneg1; 712 else 713 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 714 if (vap->va_uid == (uid_t)VNOVAL) 715 sp->sa_uid = newnfs_xdrneg1; 716 else 717 sp->sa_uid = txdr_unsigned(vap->va_uid); 718 if (vap->va_gid == (gid_t)VNOVAL) 719 sp->sa_gid = newnfs_xdrneg1; 720 else 721 sp->sa_gid = txdr_unsigned(vap->va_gid); 722 if (flags & NFSSATTR_SIZE0) 723 sp->sa_size = 0; 724 else if (flags & NFSSATTR_SIZENEG1) 725 sp->sa_size = newnfs_xdrneg1; 726 else if (flags & NFSSATTR_SIZERDEV) 727 sp->sa_size = txdr_unsigned(rdev); 728 else 729 sp->sa_size = txdr_unsigned(vap->va_size); 730 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 731 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 732 break; 733 case ND_NFSV3: 734 getmicrotime(&curtime); 735 if (vap->va_mode != (mode_t)VNOVAL) { 736 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 737 *tl++ = newnfs_true; 738 *tl = txdr_unsigned(vap->va_mode); 739 } else { 740 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 741 *tl = newnfs_false; 742 } 743 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) { 744 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 745 *tl++ = newnfs_true; 746 *tl = txdr_unsigned(vap->va_uid); 747 } else { 748 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 749 *tl = newnfs_false; 750 } 751 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) { 752 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 753 *tl++ = newnfs_true; 754 *tl = txdr_unsigned(vap->va_gid); 755 } else { 756 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 757 *tl = newnfs_false; 758 } 759 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) { 760 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 761 *tl++ = newnfs_true; 762 txdr_hyper(vap->va_size, tl); 763 } else { 764 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 765 *tl = newnfs_false; 766 } 767 if (vap->va_atime.tv_sec != VNOVAL) { 768 if (vap->va_atime.tv_sec != curtime.tv_sec) { 769 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 770 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 771 txdr_nfsv3time(&vap->va_atime, tl); 772 } else { 773 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 774 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 775 } 776 } else { 777 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 778 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 779 } 780 if (vap->va_mtime.tv_sec != VNOVAL) { 781 if (vap->va_mtime.tv_sec != curtime.tv_sec) { 782 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 783 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 784 txdr_nfsv3time(&vap->va_mtime, tl); 785 } else { 786 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 787 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 788 } 789 } else { 790 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 791 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 792 } 793 break; 794 case ND_NFSV4: 795 NFSZERO_ATTRBIT(&attrbits); 796 if (vap->va_mode != (mode_t)VNOVAL) 797 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_MODE); 798 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) 799 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER); 800 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) 801 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP); 802 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) 803 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 804 if (vap->va_atime.tv_sec != VNOVAL) 805 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET); 806 if (vap->va_mtime.tv_sec != VNOVAL) 807 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET); 808 (void) nfsv4_fillattr(nd, vp->v_mount, vp, NULL, vap, NULL, 0, 809 &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0); 810 break; 811 }; 812 } 813 814 /* 815 * nfscl_request() - mostly a wrapper for newnfs_request(). 816 */ 817 int 818 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p, 819 struct ucred *cred, void *stuff) 820 { 821 int ret, vers; 822 struct nfsmount *nmp; 823 824 nmp = VFSTONFS(vp->v_mount); 825 if (nd->nd_flag & ND_NFSV4) 826 vers = NFS_VER4; 827 else if (nd->nd_flag & ND_NFSV3) 828 vers = NFS_VER3; 829 else 830 vers = NFS_VER2; 831 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred, 832 NFS_PROG, vers, NULL, 1, NULL); 833 return (ret); 834 } 835 836 /* 837 * fill in this bsden's variant of statfs using nfsstatfs. 838 */ 839 void 840 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs) 841 { 842 struct statfs *sbp = (struct statfs *)statfs; 843 844 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) { 845 sbp->f_bsize = NFS_FABLKSIZE; 846 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE; 847 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE; 848 /* 849 * Although sf_abytes is uint64_t and f_bavail is int64_t, 850 * the value after dividing by NFS_FABLKSIZE is small 851 * enough that it will fit in 63bits, so it is ok to 852 * assign it to f_bavail without fear that it will become 853 * negative. 854 */ 855 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE; 856 sbp->f_files = sfp->sf_tfiles; 857 /* Since f_ffree is int64_t, clip it to 63bits. */ 858 if (sfp->sf_ffiles > INT64_MAX) 859 sbp->f_ffree = INT64_MAX; 860 else 861 sbp->f_ffree = sfp->sf_ffiles; 862 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) { 863 /* 864 * The type casts to (int32_t) ensure that this code is 865 * compatible with the old NFS client, in that it will 866 * propagate bit31 to the high order bits. This may or may 867 * not be correct for NFSv2, but since it is a legacy 868 * environment, I'd rather retain backwards compatibility. 869 */ 870 sbp->f_bsize = (int32_t)sfp->sf_bsize; 871 sbp->f_blocks = (int32_t)sfp->sf_blocks; 872 sbp->f_bfree = (int32_t)sfp->sf_bfree; 873 sbp->f_bavail = (int32_t)sfp->sf_bavail; 874 sbp->f_files = 0; 875 sbp->f_ffree = 0; 876 } 877 } 878 879 /* 880 * Use the fsinfo stuff to update the mount point. 881 */ 882 void 883 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp) 884 { 885 886 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) && 887 fsp->fs_wtpref >= NFS_FABLKSIZE) 888 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) & 889 ~(NFS_FABLKSIZE - 1); 890 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) { 891 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1); 892 if (nmp->nm_wsize == 0) 893 nmp->nm_wsize = fsp->fs_wtmax; 894 } 895 if (nmp->nm_wsize < NFS_FABLKSIZE) 896 nmp->nm_wsize = NFS_FABLKSIZE; 897 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) && 898 fsp->fs_rtpref >= NFS_FABLKSIZE) 899 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) & 900 ~(NFS_FABLKSIZE - 1); 901 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) { 902 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1); 903 if (nmp->nm_rsize == 0) 904 nmp->nm_rsize = fsp->fs_rtmax; 905 } 906 if (nmp->nm_rsize < NFS_FABLKSIZE) 907 nmp->nm_rsize = NFS_FABLKSIZE; 908 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize) 909 && fsp->fs_dtpref >= NFS_DIRBLKSIZ) 910 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) & 911 ~(NFS_DIRBLKSIZ - 1); 912 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) { 913 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1); 914 if (nmp->nm_readdirsize == 0) 915 nmp->nm_readdirsize = fsp->fs_rtmax; 916 } 917 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ) 918 nmp->nm_readdirsize = NFS_DIRBLKSIZ; 919 if (fsp->fs_maxfilesize > 0 && 920 fsp->fs_maxfilesize < nmp->nm_maxfilesize) 921 nmp->nm_maxfilesize = fsp->fs_maxfilesize; 922 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp); 923 nmp->nm_state |= NFSSTA_GOTFSINFO; 924 } 925 926 /* 927 * Get a pointer to my IP addrress and return it. 928 * Return NULL if you can't find one. 929 */ 930 u_int8_t * 931 nfscl_getmyip(struct nfsmount *nmp, int *isinet6p) 932 { 933 struct sockaddr_in sad, *sin; 934 struct rtentry *rt; 935 u_int8_t *retp = NULL; 936 static struct in_addr laddr; 937 938 *isinet6p = 0; 939 /* 940 * Loop up a route for the destination address. 941 */ 942 if (nmp->nm_nam->sa_family == AF_INET) { 943 bzero(&sad, sizeof (sad)); 944 sin = (struct sockaddr_in *)nmp->nm_nam; 945 sad.sin_family = AF_INET; 946 sad.sin_len = sizeof (struct sockaddr_in); 947 sad.sin_addr.s_addr = sin->sin_addr.s_addr; 948 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 949 rt = rtalloc1((struct sockaddr *)&sad, 0, 0UL); 950 if (rt != NULL) { 951 if (rt->rt_ifp != NULL && 952 rt->rt_ifa != NULL && 953 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) && 954 rt->rt_ifa->ifa_addr->sa_family == AF_INET) { 955 sin = (struct sockaddr_in *) 956 rt->rt_ifa->ifa_addr; 957 laddr.s_addr = sin->sin_addr.s_addr; 958 retp = (u_int8_t *)&laddr; 959 } 960 RTFREE_LOCKED(rt); 961 } 962 CURVNET_RESTORE(); 963 #ifdef INET6 964 } else if (nmp->nm_nam->sa_family == AF_INET6) { 965 struct sockaddr_in6 sad6, *sin6; 966 static struct in6_addr laddr6; 967 968 bzero(&sad6, sizeof (sad6)); 969 sin6 = (struct sockaddr_in6 *)nmp->nm_nam; 970 sad6.sin6_family = AF_INET6; 971 sad6.sin6_len = sizeof (struct sockaddr_in6); 972 sad6.sin6_addr = sin6->sin6_addr; 973 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred)); 974 rt = rtalloc1((struct sockaddr *)&sad6, 0, 0UL); 975 if (rt != NULL) { 976 if (rt->rt_ifp != NULL && 977 rt->rt_ifa != NULL && 978 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) && 979 rt->rt_ifa->ifa_addr->sa_family == AF_INET6) { 980 sin6 = (struct sockaddr_in6 *) 981 rt->rt_ifa->ifa_addr; 982 laddr6 = sin6->sin6_addr; 983 retp = (u_int8_t *)&laddr6; 984 *isinet6p = 1; 985 } 986 RTFREE_LOCKED(rt); 987 } 988 CURVNET_RESTORE(); 989 #endif 990 } 991 return (retp); 992 } 993 994 /* 995 * Copy NFS uid, gids from the cred structure. 996 */ 997 void 998 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr) 999 { 1000 int i; 1001 1002 KASSERT(cr->cr_ngroups >= 0, 1003 ("newnfs_copyincred: negative cr_ngroups")); 1004 nfscr->nfsc_uid = cr->cr_uid; 1005 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1); 1006 for (i = 0; i < nfscr->nfsc_ngroups; i++) 1007 nfscr->nfsc_groups[i] = cr->cr_groups[i]; 1008 } 1009 1010 1011 /* 1012 * Do any client specific initialization. 1013 */ 1014 void 1015 nfscl_init(void) 1016 { 1017 static int inited = 0; 1018 1019 if (inited) 1020 return; 1021 inited = 1; 1022 nfscl_inited = 1; 1023 ncl_pbuf_freecnt = nswbuf / 2 + 1; 1024 } 1025 1026 /* 1027 * Check each of the attributes to be set, to ensure they aren't already 1028 * the correct value. Disable setting ones already correct. 1029 */ 1030 int 1031 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap) 1032 { 1033 1034 if (vap->va_mode != (mode_t)VNOVAL) { 1035 if (vap->va_mode == nvap->na_mode) 1036 vap->va_mode = (mode_t)VNOVAL; 1037 } 1038 if (vap->va_uid != (uid_t)VNOVAL) { 1039 if (vap->va_uid == nvap->na_uid) 1040 vap->va_uid = (uid_t)VNOVAL; 1041 } 1042 if (vap->va_gid != (gid_t)VNOVAL) { 1043 if (vap->va_gid == nvap->na_gid) 1044 vap->va_gid = (gid_t)VNOVAL; 1045 } 1046 if (vap->va_size != VNOVAL) { 1047 if (vap->va_size == nvap->na_size) 1048 vap->va_size = VNOVAL; 1049 } 1050 1051 /* 1052 * We are normally called with only a partially initialized 1053 * VAP. Since the NFSv3 spec says that server may use the 1054 * file attributes to store the verifier, the spec requires 1055 * us to do a SETATTR RPC. FreeBSD servers store the verifier 1056 * in atime, but we can't really assume that all servers will 1057 * so we ensure that our SETATTR sets both atime and mtime. 1058 */ 1059 if (vap->va_mtime.tv_sec == VNOVAL) 1060 vfs_timestamp(&vap->va_mtime); 1061 if (vap->va_atime.tv_sec == VNOVAL) 1062 vap->va_atime = vap->va_mtime; 1063 return (1); 1064 } 1065 1066 /* 1067 * Map nfsv4 errors to errno.h errors. 1068 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1069 * error should only be returned for the Open, Create and Setattr Ops. 1070 * As such, most calls can just pass in 0 for those arguments. 1071 */ 1072 APPLESTATIC int 1073 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1074 { 1075 struct proc *p; 1076 1077 if (error < 10000) 1078 return (error); 1079 if (td != NULL) 1080 p = td->td_proc; 1081 else 1082 p = NULL; 1083 switch (error) { 1084 case NFSERR_BADOWNER: 1085 tprintf(p, LOG_INFO, 1086 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1087 uid, gid); 1088 return (EPERM); 1089 case NFSERR_STALECLIENTID: 1090 case NFSERR_STALESTATEID: 1091 case NFSERR_EXPIRED: 1092 case NFSERR_BADSTATEID: 1093 printf("nfsv4 recover err returned %d\n", error); 1094 return (EIO); 1095 case NFSERR_BADHANDLE: 1096 case NFSERR_SERVERFAULT: 1097 case NFSERR_BADTYPE: 1098 case NFSERR_FHEXPIRED: 1099 case NFSERR_RESOURCE: 1100 case NFSERR_MOVED: 1101 case NFSERR_NOFILEHANDLE: 1102 case NFSERR_MINORVERMISMATCH: 1103 case NFSERR_OLDSTATEID: 1104 case NFSERR_BADSEQID: 1105 case NFSERR_LEASEMOVED: 1106 case NFSERR_RECLAIMBAD: 1107 case NFSERR_BADXDR: 1108 case NFSERR_BADCHAR: 1109 case NFSERR_BADNAME: 1110 case NFSERR_OPILLEGAL: 1111 printf("nfsv4 client/server protocol prob err=%d\n", 1112 error); 1113 return (EIO); 1114 default: 1115 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1116 return (EIO); 1117 }; 1118 } 1119 1120 /* 1121 * Locate a process by number; return only "live" processes -- i.e., neither 1122 * zombies nor newly born but incompletely initialized processes. By not 1123 * returning processes in the PRS_NEW state, we allow callers to avoid 1124 * testing for that condition to avoid dereferencing p_ucred, et al. 1125 * Identical to pfind() in kern_proc.c, except it assume the list is 1126 * already locked. 1127 */ 1128 static struct proc * 1129 pfind_locked(pid_t pid) 1130 { 1131 struct proc *p; 1132 1133 LIST_FOREACH(p, PIDHASH(pid), p_hash) 1134 if (p->p_pid == pid) { 1135 PROC_LOCK(p); 1136 if (p->p_state == PRS_NEW) { 1137 PROC_UNLOCK(p); 1138 p = NULL; 1139 } 1140 break; 1141 } 1142 return (p); 1143 } 1144 1145 /* 1146 * Check to see if the process for this owner exists. Return 1 if it doesn't 1147 * and 0 otherwise. 1148 */ 1149 int 1150 nfscl_procdoesntexist(u_int8_t *own) 1151 { 1152 union { 1153 u_int32_t lval; 1154 u_int8_t cval[4]; 1155 } tl; 1156 struct proc *p; 1157 pid_t pid; 1158 int ret = 0; 1159 1160 tl.cval[0] = *own++; 1161 tl.cval[1] = *own++; 1162 tl.cval[2] = *own++; 1163 tl.cval[3] = *own++; 1164 pid = tl.lval; 1165 p = pfind_locked(pid); 1166 if (p == NULL) 1167 return (1); 1168 if (p->p_stats == NULL) { 1169 PROC_UNLOCK(p); 1170 return (0); 1171 } 1172 tl.cval[0] = *own++; 1173 tl.cval[1] = *own++; 1174 tl.cval[2] = *own++; 1175 tl.cval[3] = *own++; 1176 if (tl.lval != p->p_stats->p_start.tv_sec) { 1177 ret = 1; 1178 } else { 1179 tl.cval[0] = *own++; 1180 tl.cval[1] = *own++; 1181 tl.cval[2] = *own++; 1182 tl.cval[3] = *own; 1183 if (tl.lval != p->p_stats->p_start.tv_usec) 1184 ret = 1; 1185 } 1186 PROC_UNLOCK(p); 1187 return (ret); 1188 } 1189 1190 /* 1191 * - nfs pseudo system call for the client 1192 */ 1193 /* 1194 * MPSAFE 1195 */ 1196 static int 1197 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1198 { 1199 struct file *fp; 1200 struct nfscbd_args nfscbdarg; 1201 struct nfsd_nfscbd_args nfscbdarg2; 1202 int error; 1203 1204 if (uap->flag & NFSSVC_CBADDSOCK) { 1205 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1206 if (error) 1207 return (error); 1208 if ((error = fget(td, nfscbdarg.sock, &fp)) != 0) { 1209 return (error); 1210 } 1211 if (fp->f_type != DTYPE_SOCKET) { 1212 fdrop(fp, td); 1213 return (EPERM); 1214 } 1215 error = nfscbd_addsock(fp); 1216 fdrop(fp, td); 1217 if (!error && nfscl_enablecallb == 0) { 1218 nfsv4_cbport = nfscbdarg.port; 1219 nfscl_enablecallb = 1; 1220 } 1221 } else if (uap->flag & NFSSVC_NFSCBD) { 1222 if (uap->argp == NULL) 1223 return (EINVAL); 1224 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1225 sizeof(nfscbdarg2)); 1226 if (error) 1227 return (error); 1228 error = nfscbd_nfsd(td, &nfscbdarg2); 1229 } else { 1230 error = EINVAL; 1231 } 1232 return (error); 1233 } 1234 1235 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1236 1237 /* 1238 * Called once to initialize data structures... 1239 */ 1240 static int 1241 nfscl_modevent(module_t mod, int type, void *data) 1242 { 1243 int error = 0; 1244 static int loaded = 0; 1245 1246 switch (type) { 1247 case MOD_LOAD: 1248 if (loaded) 1249 return (0); 1250 newnfs_portinit(); 1251 mtx_init(&nfs_clstate_mutex, "nfs_clstate_mutex", NULL, 1252 MTX_DEF); 1253 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1254 nfscl_init(); 1255 NFSD_LOCK(); 1256 nfsrvd_cbinit(0); 1257 NFSD_UNLOCK(); 1258 ncl_call_invalcaches = ncl_invalcaches; 1259 nfsd_call_nfscl = nfssvc_nfscl; 1260 loaded = 1; 1261 break; 1262 1263 case MOD_UNLOAD: 1264 if (nfs_numnfscbd != 0) { 1265 error = EBUSY; 1266 break; 1267 } 1268 1269 /* 1270 * XXX: Unloading of nfscl module is unsupported. 1271 */ 1272 #if 0 1273 ncl_call_invalcaches = NULL; 1274 nfsd_call_nfscl = NULL; 1275 /* and get rid of the mutexes */ 1276 mtx_destroy(&nfs_clstate_mutex); 1277 mtx_destroy(&ncl_iod_mutex); 1278 loaded = 0; 1279 break; 1280 #else 1281 /* FALLTHROUGH */ 1282 #endif 1283 default: 1284 error = EOPNOTSUPP; 1285 break; 1286 } 1287 return error; 1288 } 1289 static moduledata_t nfscl_mod = { 1290 "nfscl", 1291 nfscl_modevent, 1292 NULL, 1293 }; 1294 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1295 1296 /* So that loader and kldload(2) can find us, wherever we are.. */ 1297 MODULE_VERSION(nfscl, 1); 1298 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1299 MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1300 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1301 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1302
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