nfs_clport.c revision 317525
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: stable/10/sys/fs/nfsclient/nfs_clport.c 317525 2017-04-27 21:37:39Z 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 54dtrace_nfsclient_attrcache_flush_probe_func_t 55 dtrace_nfscl_attrcache_flush_done_probe; 56uint32_t nfscl_attrcache_flush_done_id; 57 58dtrace_nfsclient_attrcache_get_hit_probe_func_t 59 dtrace_nfscl_attrcache_get_hit_probe; 60uint32_t nfscl_attrcache_get_hit_id; 61 62dtrace_nfsclient_attrcache_get_miss_probe_func_t 63 dtrace_nfscl_attrcache_get_miss_probe; 64uint32_t nfscl_attrcache_get_miss_id; 65 66dtrace_nfsclient_attrcache_load_probe_func_t 67 dtrace_nfscl_attrcache_load_done_probe; 68uint32_t nfscl_attrcache_load_done_id; 69#endif /* !KDTRACE_HOOKS */ 70 71extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 72extern struct vop_vector newnfs_vnodeops; 73extern struct vop_vector newnfs_fifoops; 74extern uma_zone_t newnfsnode_zone; 75extern struct buf_ops buf_ops_newnfs; 76extern int ncl_pbuf_freecnt; 77extern short nfsv4_cbport; 78extern int nfscl_enablecallb; 79extern int nfs_numnfscbd; 80extern int nfscl_inited; 81struct mtx ncl_iod_mutex; 82NFSDLOCKMUTEX; 83 84extern void (*ncl_call_invalcaches)(struct vnode *); 85 86/* 87 * Comparison function for vfs_hash functions. 88 */ 89int 90newnfs_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 */ 109int 110nfscl_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 */ 291int 292nfscl_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 */ 357int 358nfscl_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 */ 514void 515nfscl_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 */ 550void 551nfscl_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 */ 595NFSPROC_T * 596nfscl_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 */ 616static void 617start_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 628void 629nfscl_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 */ 643int 644nfscl_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 } 692nfsmout: 693 return (error); 694} 695 696/* 697 * Get postop attributes. 698 */ 699int 700nfscl_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 } 734nfsmout: 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 */ 742void 743nfscl_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 */ 859int 860nfscl_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 */ 881void 882nfscl_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 */ 924void 925nfscl_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 */ 972u_int8_t * 973nfscl_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 */ 1041void 1042newnfs_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 */ 1058void 1059nfscl_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 */ 1074int 1075nfscl_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 * Set the VA_UTIMES_NULL flag for this case, so that 1103 * the server's time will be used. This is needed to 1104 * work around a bug in some Solaris servers, where 1105 * setting the time TOCLIENT causes the Setattr RPC 1106 * to return NFS_OK, but not set va_mode. 1107 */ 1108 if (vap->va_mtime.tv_sec == VNOVAL) { 1109 vfs_timestamp(&vap->va_mtime); 1110 vap->va_vaflags |= VA_UTIMES_NULL; 1111 } 1112 if (vap->va_atime.tv_sec == VNOVAL) 1113 vap->va_atime = vap->va_mtime; 1114 return (1); 1115} 1116 1117/* 1118 * Map nfsv4 errors to errno.h errors. 1119 * The uid and gid arguments are only used for NFSERR_BADOWNER and that 1120 * error should only be returned for the Open, Create and Setattr Ops. 1121 * As such, most calls can just pass in 0 for those arguments. 1122 */ 1123APPLESTATIC int 1124nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid) 1125{ 1126 struct proc *p; 1127 1128 if (error < 10000 || error >= NFSERR_STALEWRITEVERF) 1129 return (error); 1130 if (td != NULL) 1131 p = td->td_proc; 1132 else 1133 p = NULL; 1134 switch (error) { 1135 case NFSERR_BADOWNER: 1136 tprintf(p, LOG_INFO, 1137 "No name and/or group mapping for uid,gid:(%d,%d)\n", 1138 uid, gid); 1139 return (EPERM); 1140 case NFSERR_BADNAME: 1141 case NFSERR_BADCHAR: 1142 printf("nfsv4 char/name not handled by server\n"); 1143 return (ENOENT); 1144 case NFSERR_STALECLIENTID: 1145 case NFSERR_STALESTATEID: 1146 case NFSERR_EXPIRED: 1147 case NFSERR_BADSTATEID: 1148 case NFSERR_BADSESSION: 1149 printf("nfsv4 recover err returned %d\n", error); 1150 return (EIO); 1151 case NFSERR_BADHANDLE: 1152 case NFSERR_SERVERFAULT: 1153 case NFSERR_BADTYPE: 1154 case NFSERR_FHEXPIRED: 1155 case NFSERR_RESOURCE: 1156 case NFSERR_MOVED: 1157 case NFSERR_NOFILEHANDLE: 1158 case NFSERR_MINORVERMISMATCH: 1159 case NFSERR_OLDSTATEID: 1160 case NFSERR_BADSEQID: 1161 case NFSERR_LEASEMOVED: 1162 case NFSERR_RECLAIMBAD: 1163 case NFSERR_BADXDR: 1164 case NFSERR_OPILLEGAL: 1165 printf("nfsv4 client/server protocol prob err=%d\n", 1166 error); 1167 return (EIO); 1168 default: 1169 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error); 1170 return (EIO); 1171 }; 1172} 1173 1174/* 1175 * Check to see if the process for this owner exists. Return 1 if it doesn't 1176 * and 0 otherwise. 1177 */ 1178int 1179nfscl_procdoesntexist(u_int8_t *own) 1180{ 1181 union { 1182 u_int32_t lval; 1183 u_int8_t cval[4]; 1184 } tl; 1185 struct proc *p; 1186 pid_t pid; 1187 int i, ret = 0; 1188 1189 /* For the single open_owner of all 0 bytes, just return 0. */ 1190 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++) 1191 if (own[i] != 0) 1192 break; 1193 if (i == NFSV4CL_LOCKNAMELEN) 1194 return (0); 1195 1196 tl.cval[0] = *own++; 1197 tl.cval[1] = *own++; 1198 tl.cval[2] = *own++; 1199 tl.cval[3] = *own++; 1200 pid = tl.lval; 1201 p = pfind_locked(pid); 1202 if (p == NULL) 1203 return (1); 1204 if (p->p_stats == NULL) { 1205 PROC_UNLOCK(p); 1206 return (0); 1207 } 1208 tl.cval[0] = *own++; 1209 tl.cval[1] = *own++; 1210 tl.cval[2] = *own++; 1211 tl.cval[3] = *own++; 1212 if (tl.lval != p->p_stats->p_start.tv_sec) { 1213 ret = 1; 1214 } else { 1215 tl.cval[0] = *own++; 1216 tl.cval[1] = *own++; 1217 tl.cval[2] = *own++; 1218 tl.cval[3] = *own; 1219 if (tl.lval != p->p_stats->p_start.tv_usec) 1220 ret = 1; 1221 } 1222 PROC_UNLOCK(p); 1223 return (ret); 1224} 1225 1226/* 1227 * - nfs pseudo system call for the client 1228 */ 1229/* 1230 * MPSAFE 1231 */ 1232static int 1233nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap) 1234{ 1235 struct file *fp; 1236 struct nfscbd_args nfscbdarg; 1237 struct nfsd_nfscbd_args nfscbdarg2; 1238 struct nameidata nd; 1239 struct nfscl_dumpmntopts dumpmntopts; 1240 cap_rights_t rights; 1241 char *buf; 1242 int error; 1243 1244 if (uap->flag & NFSSVC_CBADDSOCK) { 1245 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg)); 1246 if (error) 1247 return (error); 1248 /* 1249 * Since we don't know what rights might be required, 1250 * pretend that we need them all. It is better to be too 1251 * careful than too reckless. 1252 */ 1253 error = fget(td, nfscbdarg.sock, 1254 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1255 if (error) 1256 return (error); 1257 if (fp->f_type != DTYPE_SOCKET) { 1258 fdrop(fp, td); 1259 return (EPERM); 1260 } 1261 error = nfscbd_addsock(fp); 1262 fdrop(fp, td); 1263 if (!error && nfscl_enablecallb == 0) { 1264 nfsv4_cbport = nfscbdarg.port; 1265 nfscl_enablecallb = 1; 1266 } 1267 } else if (uap->flag & NFSSVC_NFSCBD) { 1268 if (uap->argp == NULL) 1269 return (EINVAL); 1270 error = copyin(uap->argp, (caddr_t)&nfscbdarg2, 1271 sizeof(nfscbdarg2)); 1272 if (error) 1273 return (error); 1274 error = nfscbd_nfsd(td, &nfscbdarg2); 1275 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) { 1276 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts)); 1277 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 || 1278 dumpmntopts.ndmnt_blen > 1024)) 1279 error = EINVAL; 1280 if (error == 0) 1281 error = nfsrv_lookupfilename(&nd, 1282 dumpmntopts.ndmnt_fname, td); 1283 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, 1284 "nfs") != 0) { 1285 vput(nd.ni_vp); 1286 error = EINVAL; 1287 } 1288 if (error == 0) { 1289 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK); 1290 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf, 1291 dumpmntopts.ndmnt_blen); 1292 vput(nd.ni_vp); 1293 error = copyout(buf, dumpmntopts.ndmnt_buf, 1294 dumpmntopts.ndmnt_blen); 1295 free(buf, M_TEMP); 1296 } 1297 } else { 1298 error = EINVAL; 1299 } 1300 return (error); 1301} 1302 1303extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *); 1304 1305/* 1306 * Called once to initialize data structures... 1307 */ 1308static int 1309nfscl_modevent(module_t mod, int type, void *data) 1310{ 1311 int error = 0; 1312 static int loaded = 0; 1313 1314 switch (type) { 1315 case MOD_LOAD: 1316 if (loaded) 1317 return (0); 1318 newnfs_portinit(); 1319 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF); 1320 nfscl_init(); 1321 NFSD_LOCK(); 1322 nfsrvd_cbinit(0); 1323 NFSD_UNLOCK(); 1324 ncl_call_invalcaches = ncl_invalcaches; 1325 nfsd_call_nfscl = nfssvc_nfscl; 1326 loaded = 1; 1327 break; 1328 1329 case MOD_UNLOAD: 1330 if (nfs_numnfscbd != 0) { 1331 error = EBUSY; 1332 break; 1333 } 1334 1335 /* 1336 * XXX: Unloading of nfscl module is unsupported. 1337 */ 1338#if 0 1339 ncl_call_invalcaches = NULL; 1340 nfsd_call_nfscl = NULL; 1341 /* and get rid of the mutexes */ 1342 mtx_destroy(&ncl_iod_mutex); 1343 loaded = 0; 1344 break; 1345#else 1346 /* FALLTHROUGH */ 1347#endif 1348 default: 1349 error = EOPNOTSUPP; 1350 break; 1351 } 1352 return error; 1353} 1354static moduledata_t nfscl_mod = { 1355 "nfscl", 1356 nfscl_modevent, 1357 NULL, 1358}; 1359DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST); 1360 1361/* So that loader and kldload(2) can find us, wherever we are.. */ 1362MODULE_VERSION(nfscl, 1); 1363MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1); 1364MODULE_DEPEND(nfscl, krpc, 1, 1, 1); 1365MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1); 1366MODULE_DEPEND(nfscl, nfslock, 1, 1, 1); 1367 1368