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("$FreeBSD$"); 36 37 #include <sys/capability.h> 38 39 /* 40 * Functions that perform the vfs operations required by the routines in 41 * nfsd_serv.c. It is hoped that this change will make the server more 42 * portable. 43 */ 44 45 #include <fs/nfs/nfsport.h> 46 #include <sys/hash.h> 47 #include <sys/sysctl.h> 48 #include <nlm/nlm_prot.h> 49 #include <nlm/nlm.h> 50 51 FEATURE(nfsd, "NFSv4 server"); 52 53 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 54 extern int nfsrv_useacl; 55 extern int newnfs_numnfsd; 56 extern struct mount nfsv4root_mnt; 57 extern struct nfsrv_stablefirst nfsrv_stablefirst; 58 extern void (*nfsd_call_servertimer)(void); 59 extern SVCPOOL *nfsrvd_pool; 60 extern struct nfsv4lock nfsd_suspend_lock; 61 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 62 NFSDLOCKMUTEX; 63 struct mtx nfs_cache_mutex; 64 struct mtx nfs_v4root_mutex; 65 struct nfsrvfh nfs_rootfh, nfs_pubfh; 66 int nfs_pubfhset = 0, nfs_rootfhset = 0; 67 struct proc *nfsd_master_proc = NULL; 68 static pid_t nfsd_master_pid = (pid_t)-1; 69 static char nfsd_master_comm[MAXCOMLEN + 1]; 70 static struct timeval nfsd_master_start; 71 static uint32_t nfsv4_sysid = 0; 72 73 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 74 struct ucred *); 75 76 int nfsrv_enable_crossmntpt = 1; 77 static int nfs_commit_blks; 78 static int nfs_commit_miss; 79 extern int nfsrv_issuedelegs; 80 extern int nfsrv_dolocallocks; 81 82 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server"); 83 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 84 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 85 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 86 0, ""); 87 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 88 0, ""); 89 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 90 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 91 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 92 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 93 94 #define MAX_REORDERED_RPC 16 95 #define NUM_HEURISTIC 1031 96 #define NHUSE_INIT 64 97 #define NHUSE_INC 16 98 #define NHUSE_MAX 2048 99 100 static struct nfsheur { 101 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 102 off_t nh_nextoff; /* next offset for sequential detection */ 103 int nh_use; /* use count for selection */ 104 int nh_seqcount; /* heuristic */ 105 } nfsheur[NUM_HEURISTIC]; 106 107 108 /* 109 * Heuristic to detect sequential operation. 110 */ 111 static struct nfsheur * 112 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 113 { 114 struct nfsheur *nh; 115 int hi, try; 116 117 /* Locate best candidate. */ 118 try = 32; 119 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 120 nh = &nfsheur[hi]; 121 while (try--) { 122 if (nfsheur[hi].nh_vp == vp) { 123 nh = &nfsheur[hi]; 124 break; 125 } 126 if (nfsheur[hi].nh_use > 0) 127 --nfsheur[hi].nh_use; 128 hi = (hi + 1) % NUM_HEURISTIC; 129 if (nfsheur[hi].nh_use < nh->nh_use) 130 nh = &nfsheur[hi]; 131 } 132 133 /* Initialize hint if this is a new file. */ 134 if (nh->nh_vp != vp) { 135 nh->nh_vp = vp; 136 nh->nh_nextoff = uio->uio_offset; 137 nh->nh_use = NHUSE_INIT; 138 if (uio->uio_offset == 0) 139 nh->nh_seqcount = 4; 140 else 141 nh->nh_seqcount = 1; 142 } 143 144 /* Calculate heuristic. */ 145 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 146 uio->uio_offset == nh->nh_nextoff) { 147 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 148 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 149 if (nh->nh_seqcount > IO_SEQMAX) 150 nh->nh_seqcount = IO_SEQMAX; 151 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 152 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 153 /* Probably a reordered RPC, leave seqcount alone. */ 154 } else if (nh->nh_seqcount > 1) { 155 nh->nh_seqcount /= 2; 156 } else { 157 nh->nh_seqcount = 0; 158 } 159 nh->nh_use += NHUSE_INC; 160 if (nh->nh_use > NHUSE_MAX) 161 nh->nh_use = NHUSE_MAX; 162 return (nh); 163 } 164 165 /* 166 * Get attributes into nfsvattr structure. 167 */ 168 int 169 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 170 struct thread *p, int vpislocked) 171 { 172 int error, lockedit = 0; 173 174 if (vpislocked == 0) { 175 /* 176 * When vpislocked == 0, the vnode is either exclusively 177 * locked by this thread or not locked by this thread. 178 * As such, shared lock it, if not exclusively locked. 179 */ 180 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 181 lockedit = 1; 182 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 183 } 184 } 185 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 186 if (lockedit != 0) 187 NFSVOPUNLOCK(vp, 0); 188 189 NFSEXITCODE(error); 190 return (error); 191 } 192 193 /* 194 * Get a file handle for a vnode. 195 */ 196 int 197 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 198 { 199 int error; 200 201 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 202 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 203 error = VOP_VPTOFH(vp, &fhp->fh_fid); 204 205 NFSEXITCODE(error); 206 return (error); 207 } 208 209 /* 210 * Perform access checking for vnodes obtained from file handles that would 211 * refer to files already opened by a Unix client. You cannot just use 212 * vn_writechk() and VOP_ACCESSX() for two reasons. 213 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 214 * case. 215 * 2 - The owner is to be given access irrespective of mode bits for some 216 * operations, so that processes that chmod after opening a file don't 217 * break. 218 */ 219 int 220 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 221 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 222 u_int32_t *supportedtypep) 223 { 224 struct vattr vattr; 225 int error = 0, getret = 0; 226 227 if (vpislocked == 0) { 228 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 229 error = EPERM; 230 goto out; 231 } 232 } 233 if (accmode & VWRITE) { 234 /* Just vn_writechk() changed to check rdonly */ 235 /* 236 * Disallow write attempts on read-only file systems; 237 * unless the file is a socket or a block or character 238 * device resident on the file system. 239 */ 240 if (NFSVNO_EXRDONLY(exp) || 241 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 242 switch (vp->v_type) { 243 case VREG: 244 case VDIR: 245 case VLNK: 246 error = EROFS; 247 default: 248 break; 249 } 250 } 251 /* 252 * If there's shared text associated with 253 * the inode, try to free it up once. If 254 * we fail, we can't allow writing. 255 */ 256 if (VOP_IS_TEXT(vp) && error == 0) 257 error = ETXTBSY; 258 } 259 if (error != 0) { 260 if (vpislocked == 0) 261 NFSVOPUNLOCK(vp, 0); 262 goto out; 263 } 264 265 /* 266 * Should the override still be applied when ACLs are enabled? 267 */ 268 error = VOP_ACCESSX(vp, accmode, cred, p); 269 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 270 /* 271 * Try again with VEXPLICIT_DENY, to see if the test for 272 * deletion is supported. 273 */ 274 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 275 if (error == 0) { 276 if (vp->v_type == VDIR) { 277 accmode &= ~(VDELETE | VDELETE_CHILD); 278 accmode |= VWRITE; 279 error = VOP_ACCESSX(vp, accmode, cred, p); 280 } else if (supportedtypep != NULL) { 281 *supportedtypep &= ~NFSACCESS_DELETE; 282 } 283 } 284 } 285 286 /* 287 * Allow certain operations for the owner (reads and writes 288 * on files that are already open). 289 */ 290 if (override != NFSACCCHK_NOOVERRIDE && 291 (error == EPERM || error == EACCES)) { 292 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 293 error = 0; 294 else if (override & NFSACCCHK_ALLOWOWNER) { 295 getret = VOP_GETATTR(vp, &vattr, cred); 296 if (getret == 0 && cred->cr_uid == vattr.va_uid) 297 error = 0; 298 } 299 } 300 if (vpislocked == 0) 301 NFSVOPUNLOCK(vp, 0); 302 303 out: 304 NFSEXITCODE(error); 305 return (error); 306 } 307 308 /* 309 * Set attribute(s) vnop. 310 */ 311 int 312 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 313 struct thread *p, struct nfsexstuff *exp) 314 { 315 int error; 316 317 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 318 NFSEXITCODE(error); 319 return (error); 320 } 321 322 /* 323 * Set up nameidata for a lookup() call and do it. 324 */ 325 int 326 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 327 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 328 struct vnode **retdirp) 329 { 330 struct componentname *cnp = &ndp->ni_cnd; 331 int i; 332 struct iovec aiov; 333 struct uio auio; 334 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 335 int error = 0, crossmnt; 336 char *cp; 337 338 *retdirp = NULL; 339 cnp->cn_nameptr = cnp->cn_pnbuf; 340 ndp->ni_strictrelative = 0; 341 /* 342 * Extract and set starting directory. 343 */ 344 if (dp->v_type != VDIR) { 345 if (islocked) 346 vput(dp); 347 else 348 vrele(dp); 349 nfsvno_relpathbuf(ndp); 350 error = ENOTDIR; 351 goto out1; 352 } 353 if (islocked) 354 NFSVOPUNLOCK(dp, 0); 355 VREF(dp); 356 *retdirp = dp; 357 if (NFSVNO_EXRDONLY(exp)) 358 cnp->cn_flags |= RDONLY; 359 ndp->ni_segflg = UIO_SYSSPACE; 360 crossmnt = 1; 361 362 if (nd->nd_flag & ND_PUBLOOKUP) { 363 ndp->ni_loopcnt = 0; 364 if (cnp->cn_pnbuf[0] == '/') { 365 vrele(dp); 366 /* 367 * Check for degenerate pathnames here, since lookup() 368 * panics on them. 369 */ 370 for (i = 1; i < ndp->ni_pathlen; i++) 371 if (cnp->cn_pnbuf[i] != '/') 372 break; 373 if (i == ndp->ni_pathlen) { 374 error = NFSERR_ACCES; 375 goto out; 376 } 377 dp = rootvnode; 378 VREF(dp); 379 } 380 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 381 (nd->nd_flag & ND_NFSV4) == 0) { 382 /* 383 * Only cross mount points for NFSv4 when doing a 384 * mount while traversing the file system above 385 * the mount point, unless nfsrv_enable_crossmntpt is set. 386 */ 387 cnp->cn_flags |= NOCROSSMOUNT; 388 crossmnt = 0; 389 } 390 391 /* 392 * Initialize for scan, set ni_startdir and bump ref on dp again 393 * because lookup() will dereference ni_startdir. 394 */ 395 396 cnp->cn_thread = p; 397 ndp->ni_startdir = dp; 398 ndp->ni_rootdir = rootvnode; 399 ndp->ni_topdir = NULL; 400 401 if (!lockleaf) 402 cnp->cn_flags |= LOCKLEAF; 403 for (;;) { 404 cnp->cn_nameptr = cnp->cn_pnbuf; 405 /* 406 * Call lookup() to do the real work. If an error occurs, 407 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 408 * we do not have to dereference anything before returning. 409 * In either case ni_startdir will be dereferenced and NULLed 410 * out. 411 */ 412 error = lookup(ndp); 413 if (error) 414 break; 415 416 /* 417 * Check for encountering a symbolic link. Trivial 418 * termination occurs if no symlink encountered. 419 */ 420 if ((cnp->cn_flags & ISSYMLINK) == 0) { 421 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 422 nfsvno_relpathbuf(ndp); 423 if (ndp->ni_vp && !lockleaf) 424 NFSVOPUNLOCK(ndp->ni_vp, 0); 425 break; 426 } 427 428 /* 429 * Validate symlink 430 */ 431 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 432 NFSVOPUNLOCK(ndp->ni_dvp, 0); 433 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 434 error = EINVAL; 435 goto badlink2; 436 } 437 438 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 439 error = ELOOP; 440 goto badlink2; 441 } 442 if (ndp->ni_pathlen > 1) 443 cp = uma_zalloc(namei_zone, M_WAITOK); 444 else 445 cp = cnp->cn_pnbuf; 446 aiov.iov_base = cp; 447 aiov.iov_len = MAXPATHLEN; 448 auio.uio_iov = &aiov; 449 auio.uio_iovcnt = 1; 450 auio.uio_offset = 0; 451 auio.uio_rw = UIO_READ; 452 auio.uio_segflg = UIO_SYSSPACE; 453 auio.uio_td = NULL; 454 auio.uio_resid = MAXPATHLEN; 455 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 456 if (error) { 457 badlink1: 458 if (ndp->ni_pathlen > 1) 459 uma_zfree(namei_zone, cp); 460 badlink2: 461 vrele(ndp->ni_dvp); 462 vput(ndp->ni_vp); 463 break; 464 } 465 linklen = MAXPATHLEN - auio.uio_resid; 466 if (linklen == 0) { 467 error = ENOENT; 468 goto badlink1; 469 } 470 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 471 error = ENAMETOOLONG; 472 goto badlink1; 473 } 474 475 /* 476 * Adjust or replace path 477 */ 478 if (ndp->ni_pathlen > 1) { 479 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 480 uma_zfree(namei_zone, cnp->cn_pnbuf); 481 cnp->cn_pnbuf = cp; 482 } else 483 cnp->cn_pnbuf[linklen] = '\0'; 484 ndp->ni_pathlen += linklen; 485 486 /* 487 * Cleanup refs for next loop and check if root directory 488 * should replace current directory. Normally ni_dvp 489 * becomes the new base directory and is cleaned up when 490 * we loop. Explicitly null pointers after invalidation 491 * to clarify operation. 492 */ 493 vput(ndp->ni_vp); 494 ndp->ni_vp = NULL; 495 496 if (cnp->cn_pnbuf[0] == '/') { 497 vrele(ndp->ni_dvp); 498 ndp->ni_dvp = ndp->ni_rootdir; 499 VREF(ndp->ni_dvp); 500 } 501 ndp->ni_startdir = ndp->ni_dvp; 502 ndp->ni_dvp = NULL; 503 } 504 if (!lockleaf) 505 cnp->cn_flags &= ~LOCKLEAF; 506 507 out: 508 if (error) { 509 nfsvno_relpathbuf(ndp); 510 ndp->ni_vp = NULL; 511 ndp->ni_dvp = NULL; 512 ndp->ni_startdir = NULL; 513 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 514 ndp->ni_dvp = NULL; 515 } 516 517 out1: 518 NFSEXITCODE2(error, nd); 519 return (error); 520 } 521 522 /* 523 * Set up a pathname buffer and return a pointer to it and, optionally 524 * set a hash pointer. 525 */ 526 void 527 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 528 { 529 struct componentname *cnp = &ndp->ni_cnd; 530 531 cnp->cn_flags |= (NOMACCHECK | HASBUF); 532 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 533 if (hashpp != NULL) 534 *hashpp = NULL; 535 *bufpp = cnp->cn_pnbuf; 536 } 537 538 /* 539 * Release the above path buffer, if not released by nfsvno_namei(). 540 */ 541 void 542 nfsvno_relpathbuf(struct nameidata *ndp) 543 { 544 545 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 546 panic("nfsrelpath"); 547 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 548 ndp->ni_cnd.cn_flags &= ~HASBUF; 549 } 550 551 /* 552 * Readlink vnode op into an mbuf list. 553 */ 554 int 555 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 556 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 557 { 558 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 559 struct iovec *ivp = iv; 560 struct uio io, *uiop = &io; 561 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 562 int i, len, tlen, error = 0; 563 564 len = 0; 565 i = 0; 566 while (len < NFS_MAXPATHLEN) { 567 NFSMGET(mp); 568 MCLGET(mp, M_WAITOK); 569 mp->m_len = NFSMSIZ(mp); 570 if (len == 0) { 571 mp3 = mp2 = mp; 572 } else { 573 mp2->m_next = mp; 574 mp2 = mp; 575 } 576 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 577 mp->m_len = NFS_MAXPATHLEN - len; 578 len = NFS_MAXPATHLEN; 579 } else { 580 len += mp->m_len; 581 } 582 ivp->iov_base = mtod(mp, caddr_t); 583 ivp->iov_len = mp->m_len; 584 i++; 585 ivp++; 586 } 587 uiop->uio_iov = iv; 588 uiop->uio_iovcnt = i; 589 uiop->uio_offset = 0; 590 uiop->uio_resid = len; 591 uiop->uio_rw = UIO_READ; 592 uiop->uio_segflg = UIO_SYSSPACE; 593 uiop->uio_td = NULL; 594 error = VOP_READLINK(vp, uiop, cred); 595 if (error) { 596 m_freem(mp3); 597 *lenp = 0; 598 goto out; 599 } 600 if (uiop->uio_resid > 0) { 601 len -= uiop->uio_resid; 602 tlen = NFSM_RNDUP(len); 603 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 604 } 605 *lenp = len; 606 *mpp = mp3; 607 *mpendp = mp; 608 609 out: 610 NFSEXITCODE(error); 611 return (error); 612 } 613 614 /* 615 * Read vnode op call into mbuf list. 616 */ 617 int 618 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 619 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 620 { 621 struct mbuf *m; 622 int i; 623 struct iovec *iv; 624 struct iovec *iv2; 625 int error = 0, len, left, siz, tlen, ioflag = 0; 626 struct mbuf *m2 = NULL, *m3; 627 struct uio io, *uiop = &io; 628 struct nfsheur *nh; 629 630 len = left = NFSM_RNDUP(cnt); 631 m3 = NULL; 632 /* 633 * Generate the mbuf list with the uio_iov ref. to it. 634 */ 635 i = 0; 636 while (left > 0) { 637 NFSMGET(m); 638 MCLGET(m, M_WAITOK); 639 m->m_len = 0; 640 siz = min(M_TRAILINGSPACE(m), left); 641 left -= siz; 642 i++; 643 if (m3) 644 m2->m_next = m; 645 else 646 m3 = m; 647 m2 = m; 648 } 649 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 650 M_TEMP, M_WAITOK); 651 uiop->uio_iov = iv2 = iv; 652 m = m3; 653 left = len; 654 i = 0; 655 while (left > 0) { 656 if (m == NULL) 657 panic("nfsvno_read iov"); 658 siz = min(M_TRAILINGSPACE(m), left); 659 if (siz > 0) { 660 iv->iov_base = mtod(m, caddr_t) + m->m_len; 661 iv->iov_len = siz; 662 m->m_len += siz; 663 left -= siz; 664 iv++; 665 i++; 666 } 667 m = m->m_next; 668 } 669 uiop->uio_iovcnt = i; 670 uiop->uio_offset = off; 671 uiop->uio_resid = len; 672 uiop->uio_rw = UIO_READ; 673 uiop->uio_segflg = UIO_SYSSPACE; 674 nh = nfsrv_sequential_heuristic(uiop, vp); 675 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 676 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 677 FREE((caddr_t)iv2, M_TEMP); 678 if (error) { 679 m_freem(m3); 680 *mpp = NULL; 681 goto out; 682 } 683 nh->nh_nextoff = uiop->uio_offset; 684 tlen = len - uiop->uio_resid; 685 cnt = cnt < tlen ? cnt : tlen; 686 tlen = NFSM_RNDUP(cnt); 687 if (tlen == 0) { 688 m_freem(m3); 689 m3 = NULL; 690 } else if (len != tlen || tlen != cnt) 691 nfsrv_adj(m3, len - tlen, tlen - cnt); 692 *mpp = m3; 693 *mpendp = m2; 694 695 out: 696 NFSEXITCODE(error); 697 return (error); 698 } 699 700 /* 701 * Write vnode op from an mbuf list. 702 */ 703 int 704 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 705 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 706 { 707 struct iovec *ivp; 708 int i, len; 709 struct iovec *iv; 710 int ioflags, error; 711 struct uio io, *uiop = &io; 712 struct nfsheur *nh; 713 714 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 715 M_WAITOK); 716 uiop->uio_iov = iv = ivp; 717 uiop->uio_iovcnt = cnt; 718 i = mtod(mp, caddr_t) + mp->m_len - cp; 719 len = retlen; 720 while (len > 0) { 721 if (mp == NULL) 722 panic("nfsvno_write"); 723 if (i > 0) { 724 i = min(i, len); 725 ivp->iov_base = cp; 726 ivp->iov_len = i; 727 ivp++; 728 len -= i; 729 } 730 mp = mp->m_next; 731 if (mp) { 732 i = mp->m_len; 733 cp = mtod(mp, caddr_t); 734 } 735 } 736 737 if (stable == NFSWRITE_UNSTABLE) 738 ioflags = IO_NODELOCKED; 739 else 740 ioflags = (IO_SYNC | IO_NODELOCKED); 741 uiop->uio_resid = retlen; 742 uiop->uio_rw = UIO_WRITE; 743 uiop->uio_segflg = UIO_SYSSPACE; 744 NFSUIOPROC(uiop, p); 745 uiop->uio_offset = off; 746 nh = nfsrv_sequential_heuristic(uiop, vp); 747 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 748 error = VOP_WRITE(vp, uiop, ioflags, cred); 749 if (error == 0) 750 nh->nh_nextoff = uiop->uio_offset; 751 FREE((caddr_t)iv, M_TEMP); 752 753 NFSEXITCODE(error); 754 return (error); 755 } 756 757 /* 758 * Common code for creating a regular file (plus special files for V2). 759 */ 760 int 761 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 762 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 763 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 764 { 765 u_quad_t tempsize; 766 int error; 767 768 error = nd->nd_repstat; 769 if (!error && ndp->ni_vp == NULL) { 770 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 771 vrele(ndp->ni_startdir); 772 error = VOP_CREATE(ndp->ni_dvp, 773 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 774 vput(ndp->ni_dvp); 775 nfsvno_relpathbuf(ndp); 776 if (!error) { 777 if (*exclusive_flagp) { 778 *exclusive_flagp = 0; 779 NFSVNO_ATTRINIT(nvap); 780 nvap->na_atime.tv_sec = cverf[0]; 781 nvap->na_atime.tv_nsec = cverf[1]; 782 error = VOP_SETATTR(ndp->ni_vp, 783 &nvap->na_vattr, nd->nd_cred); 784 } 785 } 786 /* 787 * NFS V2 Only. nfsrvd_mknod() does this for V3. 788 * (This implies, just get out on an error.) 789 */ 790 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 791 nvap->na_type == VFIFO) { 792 if (nvap->na_type == VCHR && rdev == 0xffffffff) 793 nvap->na_type = VFIFO; 794 if (nvap->na_type != VFIFO && 795 (error = priv_check_cred(nd->nd_cred, 796 PRIV_VFS_MKNOD_DEV, 0))) { 797 vrele(ndp->ni_startdir); 798 nfsvno_relpathbuf(ndp); 799 vput(ndp->ni_dvp); 800 goto out; 801 } 802 nvap->na_rdev = rdev; 803 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 804 &ndp->ni_cnd, &nvap->na_vattr); 805 vput(ndp->ni_dvp); 806 nfsvno_relpathbuf(ndp); 807 vrele(ndp->ni_startdir); 808 if (error) 809 goto out; 810 } else { 811 vrele(ndp->ni_startdir); 812 nfsvno_relpathbuf(ndp); 813 vput(ndp->ni_dvp); 814 error = ENXIO; 815 goto out; 816 } 817 *vpp = ndp->ni_vp; 818 } else { 819 /* 820 * Handle cases where error is already set and/or 821 * the file exists. 822 * 1 - clean up the lookup 823 * 2 - iff !error and na_size set, truncate it 824 */ 825 vrele(ndp->ni_startdir); 826 nfsvno_relpathbuf(ndp); 827 *vpp = ndp->ni_vp; 828 if (ndp->ni_dvp == *vpp) 829 vrele(ndp->ni_dvp); 830 else 831 vput(ndp->ni_dvp); 832 if (!error && nvap->na_size != VNOVAL) { 833 error = nfsvno_accchk(*vpp, VWRITE, 834 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 835 NFSACCCHK_VPISLOCKED, NULL); 836 if (!error) { 837 tempsize = nvap->na_size; 838 NFSVNO_ATTRINIT(nvap); 839 nvap->na_size = tempsize; 840 error = VOP_SETATTR(*vpp, 841 &nvap->na_vattr, nd->nd_cred); 842 } 843 } 844 if (error) 845 vput(*vpp); 846 } 847 848 out: 849 NFSEXITCODE(error); 850 return (error); 851 } 852 853 /* 854 * Do a mknod vnode op. 855 */ 856 int 857 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 858 struct thread *p) 859 { 860 int error = 0; 861 enum vtype vtyp; 862 863 vtyp = nvap->na_type; 864 /* 865 * Iff doesn't exist, create it. 866 */ 867 if (ndp->ni_vp) { 868 vrele(ndp->ni_startdir); 869 nfsvno_relpathbuf(ndp); 870 vput(ndp->ni_dvp); 871 vrele(ndp->ni_vp); 872 error = EEXIST; 873 goto out; 874 } 875 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 876 vrele(ndp->ni_startdir); 877 nfsvno_relpathbuf(ndp); 878 vput(ndp->ni_dvp); 879 error = NFSERR_BADTYPE; 880 goto out; 881 } 882 if (vtyp == VSOCK) { 883 vrele(ndp->ni_startdir); 884 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 885 &ndp->ni_cnd, &nvap->na_vattr); 886 vput(ndp->ni_dvp); 887 nfsvno_relpathbuf(ndp); 888 } else { 889 if (nvap->na_type != VFIFO && 890 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 891 vrele(ndp->ni_startdir); 892 nfsvno_relpathbuf(ndp); 893 vput(ndp->ni_dvp); 894 goto out; 895 } 896 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 897 &ndp->ni_cnd, &nvap->na_vattr); 898 vput(ndp->ni_dvp); 899 nfsvno_relpathbuf(ndp); 900 vrele(ndp->ni_startdir); 901 /* 902 * Since VOP_MKNOD returns the ni_vp, I can't 903 * see any reason to do the lookup. 904 */ 905 } 906 907 out: 908 NFSEXITCODE(error); 909 return (error); 910 } 911 912 /* 913 * Mkdir vnode op. 914 */ 915 int 916 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 917 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 918 { 919 int error = 0; 920 921 if (ndp->ni_vp != NULL) { 922 if (ndp->ni_dvp == ndp->ni_vp) 923 vrele(ndp->ni_dvp); 924 else 925 vput(ndp->ni_dvp); 926 vrele(ndp->ni_vp); 927 nfsvno_relpathbuf(ndp); 928 error = EEXIST; 929 goto out; 930 } 931 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 932 &nvap->na_vattr); 933 vput(ndp->ni_dvp); 934 nfsvno_relpathbuf(ndp); 935 936 out: 937 NFSEXITCODE(error); 938 return (error); 939 } 940 941 /* 942 * symlink vnode op. 943 */ 944 int 945 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 946 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 947 struct nfsexstuff *exp) 948 { 949 int error = 0; 950 951 if (ndp->ni_vp) { 952 vrele(ndp->ni_startdir); 953 nfsvno_relpathbuf(ndp); 954 if (ndp->ni_dvp == ndp->ni_vp) 955 vrele(ndp->ni_dvp); 956 else 957 vput(ndp->ni_dvp); 958 vrele(ndp->ni_vp); 959 error = EEXIST; 960 goto out; 961 } 962 963 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 964 &nvap->na_vattr, pathcp); 965 vput(ndp->ni_dvp); 966 vrele(ndp->ni_startdir); 967 nfsvno_relpathbuf(ndp); 968 /* 969 * Although FreeBSD still had the lookup code in 970 * it for 7/current, there doesn't seem to be any 971 * point, since VOP_SYMLINK() returns the ni_vp. 972 * Just vput it for v2. 973 */ 974 if (!not_v2 && !error) 975 vput(ndp->ni_vp); 976 977 out: 978 NFSEXITCODE(error); 979 return (error); 980 } 981 982 /* 983 * Parse symbolic link arguments. 984 * This function has an ugly side effect. It will MALLOC() an area for 985 * the symlink and set iov_base to point to it, only if it succeeds. 986 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 987 * be FREE'd later. 988 */ 989 int 990 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 991 struct thread *p, char **pathcpp, int *lenp) 992 { 993 u_int32_t *tl; 994 char *pathcp = NULL; 995 int error = 0, len; 996 struct nfsv2_sattr *sp; 997 998 *pathcpp = NULL; 999 *lenp = 0; 1000 if ((nd->nd_flag & ND_NFSV3) && 1001 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p))) 1002 goto nfsmout; 1003 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1004 len = fxdr_unsigned(int, *tl); 1005 if (len > NFS_MAXPATHLEN || len <= 0) { 1006 error = EBADRPC; 1007 goto nfsmout; 1008 } 1009 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1010 error = nfsrv_mtostr(nd, pathcp, len); 1011 if (error) 1012 goto nfsmout; 1013 if (nd->nd_flag & ND_NFSV2) { 1014 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1015 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1016 } 1017 *pathcpp = pathcp; 1018 *lenp = len; 1019 NFSEXITCODE2(0, nd); 1020 return (0); 1021 nfsmout: 1022 if (pathcp) 1023 free(pathcp, M_TEMP); 1024 NFSEXITCODE2(error, nd); 1025 return (error); 1026 } 1027 1028 /* 1029 * Remove a non-directory object. 1030 */ 1031 int 1032 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1033 struct thread *p, struct nfsexstuff *exp) 1034 { 1035 struct vnode *vp; 1036 int error = 0; 1037 1038 vp = ndp->ni_vp; 1039 if (vp->v_type == VDIR) 1040 error = NFSERR_ISDIR; 1041 else if (is_v4) 1042 error = nfsrv_checkremove(vp, 1, p); 1043 if (!error) 1044 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1045 if (ndp->ni_dvp == vp) 1046 vrele(ndp->ni_dvp); 1047 else 1048 vput(ndp->ni_dvp); 1049 vput(vp); 1050 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1051 nfsvno_relpathbuf(ndp); 1052 NFSEXITCODE(error); 1053 return (error); 1054 } 1055 1056 /* 1057 * Remove a directory. 1058 */ 1059 int 1060 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1061 struct thread *p, struct nfsexstuff *exp) 1062 { 1063 struct vnode *vp; 1064 int error = 0; 1065 1066 vp = ndp->ni_vp; 1067 if (vp->v_type != VDIR) { 1068 error = ENOTDIR; 1069 goto out; 1070 } 1071 /* 1072 * No rmdir "." please. 1073 */ 1074 if (ndp->ni_dvp == vp) { 1075 error = EINVAL; 1076 goto out; 1077 } 1078 /* 1079 * The root of a mounted filesystem cannot be deleted. 1080 */ 1081 if (vp->v_vflag & VV_ROOT) 1082 error = EBUSY; 1083 out: 1084 if (!error) 1085 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1086 if (ndp->ni_dvp == vp) 1087 vrele(ndp->ni_dvp); 1088 else 1089 vput(ndp->ni_dvp); 1090 vput(vp); 1091 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1092 nfsvno_relpathbuf(ndp); 1093 NFSEXITCODE(error); 1094 return (error); 1095 } 1096 1097 /* 1098 * Rename vnode op. 1099 */ 1100 int 1101 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1102 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1103 { 1104 struct vnode *fvp, *tvp, *tdvp; 1105 int error = 0; 1106 1107 fvp = fromndp->ni_vp; 1108 if (ndstat) { 1109 vrele(fromndp->ni_dvp); 1110 vrele(fvp); 1111 error = ndstat; 1112 goto out1; 1113 } 1114 tdvp = tondp->ni_dvp; 1115 tvp = tondp->ni_vp; 1116 if (tvp != NULL) { 1117 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1118 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1119 goto out; 1120 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1121 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1122 goto out; 1123 } 1124 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1125 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1126 goto out; 1127 } 1128 1129 /* 1130 * A rename to '.' or '..' results in a prematurely 1131 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1132 * here. 1133 */ 1134 if ((tondp->ni_cnd.cn_namelen == 1 && 1135 tondp->ni_cnd.cn_nameptr[0] == '.') || 1136 (tondp->ni_cnd.cn_namelen == 2 && 1137 tondp->ni_cnd.cn_nameptr[0] == '.' && 1138 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1139 error = EINVAL; 1140 goto out; 1141 } 1142 } 1143 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1144 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1145 goto out; 1146 } 1147 if (fvp->v_mount != tdvp->v_mount) { 1148 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1149 goto out; 1150 } 1151 if (fvp == tdvp) { 1152 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1153 goto out; 1154 } 1155 if (fvp == tvp) { 1156 /* 1157 * If source and destination are the same, there is nothing to 1158 * do. Set error to -1 to indicate this. 1159 */ 1160 error = -1; 1161 goto out; 1162 } 1163 if (ndflag & ND_NFSV4) { 1164 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1165 error = nfsrv_checkremove(fvp, 0, p); 1166 NFSVOPUNLOCK(fvp, 0); 1167 } else 1168 error = EPERM; 1169 if (tvp && !error) 1170 error = nfsrv_checkremove(tvp, 1, p); 1171 } else { 1172 /* 1173 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1174 * that the NFSv4 client won't be confused by the rename. 1175 * Since nfsd_recalldelegation() can only be called on an 1176 * unlocked vnode at this point and fvp is the file that will 1177 * still exist after the rename, just do fvp. 1178 */ 1179 nfsd_recalldelegation(fvp, p); 1180 } 1181 out: 1182 if (!error) { 1183 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1184 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1185 &tondp->ni_cnd); 1186 } else { 1187 if (tdvp == tvp) 1188 vrele(tdvp); 1189 else 1190 vput(tdvp); 1191 if (tvp) 1192 vput(tvp); 1193 vrele(fromndp->ni_dvp); 1194 vrele(fvp); 1195 if (error == -1) 1196 error = 0; 1197 } 1198 vrele(tondp->ni_startdir); 1199 nfsvno_relpathbuf(tondp); 1200 out1: 1201 vrele(fromndp->ni_startdir); 1202 nfsvno_relpathbuf(fromndp); 1203 NFSEXITCODE(error); 1204 return (error); 1205 } 1206 1207 /* 1208 * Link vnode op. 1209 */ 1210 int 1211 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1212 struct thread *p, struct nfsexstuff *exp) 1213 { 1214 struct vnode *xp; 1215 int error = 0; 1216 1217 xp = ndp->ni_vp; 1218 if (xp != NULL) { 1219 error = EEXIST; 1220 } else { 1221 xp = ndp->ni_dvp; 1222 if (vp->v_mount != xp->v_mount) 1223 error = EXDEV; 1224 } 1225 if (!error) { 1226 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1227 if ((vp->v_iflag & VI_DOOMED) == 0) 1228 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1229 else 1230 error = EPERM; 1231 if (ndp->ni_dvp == vp) 1232 vrele(ndp->ni_dvp); 1233 else 1234 vput(ndp->ni_dvp); 1235 NFSVOPUNLOCK(vp, 0); 1236 } else { 1237 if (ndp->ni_dvp == ndp->ni_vp) 1238 vrele(ndp->ni_dvp); 1239 else 1240 vput(ndp->ni_dvp); 1241 if (ndp->ni_vp) 1242 vrele(ndp->ni_vp); 1243 } 1244 nfsvno_relpathbuf(ndp); 1245 NFSEXITCODE(error); 1246 return (error); 1247 } 1248 1249 /* 1250 * Do the fsync() appropriate for the commit. 1251 */ 1252 int 1253 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1254 struct thread *td) 1255 { 1256 int error = 0; 1257 1258 /* 1259 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1260 * file is done. At this time VOP_FSYNC does not accept offset and 1261 * byte count parameters so call VOP_FSYNC the whole file for now. 1262 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1263 */ 1264 if (cnt == 0 || cnt > MAX_COMMIT_COUNT) { 1265 /* 1266 * Give up and do the whole thing 1267 */ 1268 if (vp->v_object && 1269 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1270 VM_OBJECT_WLOCK(vp->v_object); 1271 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1272 VM_OBJECT_WUNLOCK(vp->v_object); 1273 } 1274 error = VOP_FSYNC(vp, MNT_WAIT, td); 1275 } else { 1276 /* 1277 * Locate and synchronously write any buffers that fall 1278 * into the requested range. Note: we are assuming that 1279 * f_iosize is a power of 2. 1280 */ 1281 int iosize = vp->v_mount->mnt_stat.f_iosize; 1282 int iomask = iosize - 1; 1283 struct bufobj *bo; 1284 daddr_t lblkno; 1285 1286 /* 1287 * Align to iosize boundry, super-align to page boundry. 1288 */ 1289 if (off & iomask) { 1290 cnt += off & iomask; 1291 off &= ~(u_quad_t)iomask; 1292 } 1293 if (off & PAGE_MASK) { 1294 cnt += off & PAGE_MASK; 1295 off &= ~(u_quad_t)PAGE_MASK; 1296 } 1297 lblkno = off / iosize; 1298 1299 if (vp->v_object && 1300 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1301 VM_OBJECT_WLOCK(vp->v_object); 1302 vm_object_page_clean(vp->v_object, off, off + cnt, 1303 OBJPC_SYNC); 1304 VM_OBJECT_WUNLOCK(vp->v_object); 1305 } 1306 1307 bo = &vp->v_bufobj; 1308 BO_LOCK(bo); 1309 while (cnt > 0) { 1310 struct buf *bp; 1311 1312 /* 1313 * If we have a buffer and it is marked B_DELWRI we 1314 * have to lock and write it. Otherwise the prior 1315 * write is assumed to have already been committed. 1316 * 1317 * gbincore() can return invalid buffers now so we 1318 * have to check that bit as well (though B_DELWRI 1319 * should not be set if B_INVAL is set there could be 1320 * a race here since we haven't locked the buffer). 1321 */ 1322 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1323 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1324 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1325 BO_LOCK(bo); 1326 continue; /* retry */ 1327 } 1328 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1329 B_DELWRI) { 1330 bremfree(bp); 1331 bp->b_flags &= ~B_ASYNC; 1332 bwrite(bp); 1333 ++nfs_commit_miss; 1334 } else 1335 BUF_UNLOCK(bp); 1336 BO_LOCK(bo); 1337 } 1338 ++nfs_commit_blks; 1339 if (cnt < iosize) 1340 break; 1341 cnt -= iosize; 1342 ++lblkno; 1343 } 1344 BO_UNLOCK(bo); 1345 } 1346 NFSEXITCODE(error); 1347 return (error); 1348 } 1349 1350 /* 1351 * Statfs vnode op. 1352 */ 1353 int 1354 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1355 { 1356 int error; 1357 1358 error = VFS_STATFS(vp->v_mount, sf); 1359 if (error == 0) { 1360 /* 1361 * Since NFS handles these values as unsigned on the 1362 * wire, there is no way to represent negative values, 1363 * so set them to 0. Without this, they will appear 1364 * to be very large positive values for clients like 1365 * Solaris10. 1366 */ 1367 if (sf->f_bavail < 0) 1368 sf->f_bavail = 0; 1369 if (sf->f_ffree < 0) 1370 sf->f_ffree = 0; 1371 } 1372 NFSEXITCODE(error); 1373 return (error); 1374 } 1375 1376 /* 1377 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1378 * must handle nfsrv_opencheck() calls after any other access checks. 1379 */ 1380 void 1381 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1382 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1383 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1384 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1385 struct nfsexstuff *exp, struct vnode **vpp) 1386 { 1387 struct vnode *vp = NULL; 1388 u_quad_t tempsize; 1389 struct nfsexstuff nes; 1390 1391 if (ndp->ni_vp == NULL) 1392 nd->nd_repstat = nfsrv_opencheck(clientid, 1393 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1394 if (!nd->nd_repstat) { 1395 if (ndp->ni_vp == NULL) { 1396 vrele(ndp->ni_startdir); 1397 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1398 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1399 vput(ndp->ni_dvp); 1400 nfsvno_relpathbuf(ndp); 1401 if (!nd->nd_repstat) { 1402 if (*exclusive_flagp) { 1403 *exclusive_flagp = 0; 1404 NFSVNO_ATTRINIT(nvap); 1405 nvap->na_atime.tv_sec = cverf[0]; 1406 nvap->na_atime.tv_nsec = cverf[1]; 1407 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1408 &nvap->na_vattr, cred); 1409 } else { 1410 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1411 aclp, p, attrbitp, exp); 1412 } 1413 } 1414 vp = ndp->ni_vp; 1415 } else { 1416 if (ndp->ni_startdir) 1417 vrele(ndp->ni_startdir); 1418 nfsvno_relpathbuf(ndp); 1419 vp = ndp->ni_vp; 1420 if (create == NFSV4OPEN_CREATE) { 1421 if (ndp->ni_dvp == vp) 1422 vrele(ndp->ni_dvp); 1423 else 1424 vput(ndp->ni_dvp); 1425 } 1426 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1427 if (ndp->ni_cnd.cn_flags & RDONLY) 1428 NFSVNO_SETEXRDONLY(&nes); 1429 else 1430 NFSVNO_EXINIT(&nes); 1431 nd->nd_repstat = nfsvno_accchk(vp, 1432 VWRITE, cred, &nes, p, 1433 NFSACCCHK_NOOVERRIDE, 1434 NFSACCCHK_VPISLOCKED, NULL); 1435 nd->nd_repstat = nfsrv_opencheck(clientid, 1436 stateidp, stp, vp, nd, p, nd->nd_repstat); 1437 if (!nd->nd_repstat) { 1438 tempsize = nvap->na_size; 1439 NFSVNO_ATTRINIT(nvap); 1440 nvap->na_size = tempsize; 1441 nd->nd_repstat = VOP_SETATTR(vp, 1442 &nvap->na_vattr, cred); 1443 } 1444 } else if (vp->v_type == VREG) { 1445 nd->nd_repstat = nfsrv_opencheck(clientid, 1446 stateidp, stp, vp, nd, p, nd->nd_repstat); 1447 } 1448 } 1449 } else { 1450 if (ndp->ni_cnd.cn_flags & HASBUF) 1451 nfsvno_relpathbuf(ndp); 1452 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1453 vrele(ndp->ni_startdir); 1454 if (ndp->ni_dvp == ndp->ni_vp) 1455 vrele(ndp->ni_dvp); 1456 else 1457 vput(ndp->ni_dvp); 1458 if (ndp->ni_vp) 1459 vput(ndp->ni_vp); 1460 } 1461 } 1462 *vpp = vp; 1463 1464 NFSEXITCODE2(0, nd); 1465 } 1466 1467 /* 1468 * Updates the file rev and sets the mtime and ctime 1469 * to the current clock time, returning the va_filerev and va_Xtime 1470 * values. 1471 */ 1472 void 1473 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1474 struct ucred *cred, struct thread *p) 1475 { 1476 struct vattr va; 1477 1478 VATTR_NULL(&va); 1479 vfs_timestamp(&va.va_mtime); 1480 (void) VOP_SETATTR(vp, &va, cred); 1481 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1482 } 1483 1484 /* 1485 * Glue routine to nfsv4_fillattr(). 1486 */ 1487 int 1488 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1489 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1490 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1491 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1492 { 1493 int error; 1494 1495 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1496 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1497 mounted_on_fileno); 1498 NFSEXITCODE2(0, nd); 1499 return (error); 1500 } 1501 1502 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1503 /* 1504 * nfs readdir service 1505 * - mallocs what it thinks is enough to read 1506 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1507 * - calls VOP_READDIR() 1508 * - loops around building the reply 1509 * if the output generated exceeds count break out of loop 1510 * The NFSM_CLGET macro is used here so that the reply will be packed 1511 * tightly in mbuf clusters. 1512 * - it trims out records with d_fileno == 0 1513 * this doesn't matter for Unix clients, but they might confuse clients 1514 * for other os'. 1515 * - it trims out records with d_type == DT_WHT 1516 * these cannot be seen through NFS (unless we extend the protocol) 1517 * The alternate call nfsrvd_readdirplus() does lookups as well. 1518 * PS: The NFS protocol spec. does not clarify what the "count" byte 1519 * argument is a count of.. just name strings and file id's or the 1520 * entire reply rpc or ... 1521 * I tried just file name and id sizes and it confused the Sun client, 1522 * so I am using the full rpc size now. The "paranoia.." comment refers 1523 * to including the status longwords that are not a part of the dir. 1524 * "entry" structures, but are in the rpc. 1525 */ 1526 int 1527 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1528 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1529 { 1530 struct dirent *dp; 1531 u_int32_t *tl; 1532 int dirlen; 1533 char *cpos, *cend, *rbuf; 1534 struct nfsvattr at; 1535 int nlen, error = 0, getret = 1; 1536 int siz, cnt, fullsiz, eofflag, ncookies; 1537 u_int64_t off, toff, verf; 1538 u_long *cookies = NULL, *cookiep; 1539 struct uio io; 1540 struct iovec iv; 1541 int not_zfs; 1542 1543 if (nd->nd_repstat) { 1544 nfsrv_postopattr(nd, getret, &at); 1545 goto out; 1546 } 1547 if (nd->nd_flag & ND_NFSV2) { 1548 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1549 off = fxdr_unsigned(u_quad_t, *tl++); 1550 } else { 1551 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1552 off = fxdr_hyper(tl); 1553 tl += 2; 1554 verf = fxdr_hyper(tl); 1555 tl += 2; 1556 } 1557 toff = off; 1558 cnt = fxdr_unsigned(int, *tl); 1559 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1560 cnt = NFS_SRVMAXDATA(nd); 1561 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1562 fullsiz = siz; 1563 if (nd->nd_flag & ND_NFSV3) { 1564 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1565 p, 1); 1566 #if 0 1567 /* 1568 * va_filerev is not sufficient as a cookie verifier, 1569 * since it is not supposed to change when entries are 1570 * removed/added unless that offset cookies returned to 1571 * the client are no longer valid. 1572 */ 1573 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1574 nd->nd_repstat = NFSERR_BAD_COOKIE; 1575 #endif 1576 } 1577 if (!nd->nd_repstat && vp->v_type != VDIR) 1578 nd->nd_repstat = NFSERR_NOTDIR; 1579 if (nd->nd_repstat == 0 && cnt == 0) { 1580 if (nd->nd_flag & ND_NFSV2) 1581 /* NFSv2 does not have NFSERR_TOOSMALL */ 1582 nd->nd_repstat = EPERM; 1583 else 1584 nd->nd_repstat = NFSERR_TOOSMALL; 1585 } 1586 if (!nd->nd_repstat) 1587 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1588 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1589 NFSACCCHK_VPISLOCKED, NULL); 1590 if (nd->nd_repstat) { 1591 vput(vp); 1592 if (nd->nd_flag & ND_NFSV3) 1593 nfsrv_postopattr(nd, getret, &at); 1594 goto out; 1595 } 1596 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1597 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1598 again: 1599 eofflag = 0; 1600 if (cookies) { 1601 free((caddr_t)cookies, M_TEMP); 1602 cookies = NULL; 1603 } 1604 1605 iv.iov_base = rbuf; 1606 iv.iov_len = siz; 1607 io.uio_iov = &iv; 1608 io.uio_iovcnt = 1; 1609 io.uio_offset = (off_t)off; 1610 io.uio_resid = siz; 1611 io.uio_segflg = UIO_SYSSPACE; 1612 io.uio_rw = UIO_READ; 1613 io.uio_td = NULL; 1614 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1615 &cookies); 1616 off = (u_int64_t)io.uio_offset; 1617 if (io.uio_resid) 1618 siz -= io.uio_resid; 1619 1620 if (!cookies && !nd->nd_repstat) 1621 nd->nd_repstat = NFSERR_PERM; 1622 if (nd->nd_flag & ND_NFSV3) { 1623 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1624 if (!nd->nd_repstat) 1625 nd->nd_repstat = getret; 1626 } 1627 1628 /* 1629 * Handles the failed cases. nd->nd_repstat == 0 past here. 1630 */ 1631 if (nd->nd_repstat) { 1632 vput(vp); 1633 free((caddr_t)rbuf, M_TEMP); 1634 if (cookies) 1635 free((caddr_t)cookies, M_TEMP); 1636 if (nd->nd_flag & ND_NFSV3) 1637 nfsrv_postopattr(nd, getret, &at); 1638 goto out; 1639 } 1640 /* 1641 * If nothing read, return eof 1642 * rpc reply 1643 */ 1644 if (siz == 0) { 1645 vput(vp); 1646 if (nd->nd_flag & ND_NFSV2) { 1647 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1648 } else { 1649 nfsrv_postopattr(nd, getret, &at); 1650 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1651 txdr_hyper(at.na_filerev, tl); 1652 tl += 2; 1653 } 1654 *tl++ = newnfs_false; 1655 *tl = newnfs_true; 1656 FREE((caddr_t)rbuf, M_TEMP); 1657 FREE((caddr_t)cookies, M_TEMP); 1658 goto out; 1659 } 1660 1661 /* 1662 * Check for degenerate cases of nothing useful read. 1663 * If so go try again 1664 */ 1665 cpos = rbuf; 1666 cend = rbuf + siz; 1667 dp = (struct dirent *)cpos; 1668 cookiep = cookies; 1669 1670 /* 1671 * For some reason FreeBSD's ufs_readdir() chooses to back the 1672 * directory offset up to a block boundary, so it is necessary to 1673 * skip over the records that precede the requested offset. This 1674 * requires the assumption that file offset cookies monotonically 1675 * increase. 1676 * Since the offset cookies don't monotonically increase for ZFS, 1677 * this is not done when ZFS is the file system. 1678 */ 1679 while (cpos < cend && ncookies > 0 && 1680 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1681 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) { 1682 cpos += dp->d_reclen; 1683 dp = (struct dirent *)cpos; 1684 cookiep++; 1685 ncookies--; 1686 } 1687 if (cpos >= cend || ncookies == 0) { 1688 siz = fullsiz; 1689 toff = off; 1690 goto again; 1691 } 1692 vput(vp); 1693 1694 /* 1695 * dirlen is the size of the reply, including all XDR and must 1696 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1697 * if the XDR should be included in "count", but to be safe, we do. 1698 * (Include the two booleans at the end of the reply in dirlen now.) 1699 */ 1700 if (nd->nd_flag & ND_NFSV3) { 1701 nfsrv_postopattr(nd, getret, &at); 1702 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1703 txdr_hyper(at.na_filerev, tl); 1704 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1705 } else { 1706 dirlen = 2 * NFSX_UNSIGNED; 1707 } 1708 1709 /* Loop through the records and build reply */ 1710 while (cpos < cend && ncookies > 0) { 1711 nlen = dp->d_namlen; 1712 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1713 nlen <= NFS_MAXNAMLEN) { 1714 if (nd->nd_flag & ND_NFSV3) 1715 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1716 else 1717 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1718 if (dirlen > cnt) { 1719 eofflag = 0; 1720 break; 1721 } 1722 1723 /* 1724 * Build the directory record xdr from 1725 * the dirent entry. 1726 */ 1727 if (nd->nd_flag & ND_NFSV3) { 1728 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1729 *tl++ = newnfs_true; 1730 *tl++ = 0; 1731 } else { 1732 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1733 *tl++ = newnfs_true; 1734 } 1735 *tl = txdr_unsigned(dp->d_fileno); 1736 (void) nfsm_strtom(nd, dp->d_name, nlen); 1737 if (nd->nd_flag & ND_NFSV3) { 1738 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1739 *tl++ = 0; 1740 } else 1741 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1742 *tl = txdr_unsigned(*cookiep); 1743 } 1744 cpos += dp->d_reclen; 1745 dp = (struct dirent *)cpos; 1746 cookiep++; 1747 ncookies--; 1748 } 1749 if (cpos < cend) 1750 eofflag = 0; 1751 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1752 *tl++ = newnfs_false; 1753 if (eofflag) 1754 *tl = newnfs_true; 1755 else 1756 *tl = newnfs_false; 1757 FREE((caddr_t)rbuf, M_TEMP); 1758 FREE((caddr_t)cookies, M_TEMP); 1759 1760 out: 1761 NFSEXITCODE2(0, nd); 1762 return (0); 1763 nfsmout: 1764 vput(vp); 1765 NFSEXITCODE2(error, nd); 1766 return (error); 1767 } 1768 1769 /* 1770 * Readdirplus for V3 and Readdir for V4. 1771 */ 1772 int 1773 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1774 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1775 { 1776 struct dirent *dp; 1777 u_int32_t *tl; 1778 int dirlen; 1779 char *cpos, *cend, *rbuf; 1780 struct vnode *nvp; 1781 fhandle_t nfh; 1782 struct nfsvattr nva, at, *nvap = &nva; 1783 struct mbuf *mb0, *mb1; 1784 struct nfsreferral *refp; 1785 int nlen, r, error = 0, getret = 1, usevget = 1; 1786 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1787 caddr_t bpos0, bpos1; 1788 u_int64_t off, toff, verf; 1789 u_long *cookies = NULL, *cookiep; 1790 nfsattrbit_t attrbits, rderrbits, savbits; 1791 struct uio io; 1792 struct iovec iv; 1793 struct componentname cn; 1794 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls; 1795 struct mount *mp, *new_mp; 1796 uint64_t mounted_on_fileno; 1797 1798 if (nd->nd_repstat) { 1799 nfsrv_postopattr(nd, getret, &at); 1800 goto out; 1801 } 1802 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1803 off = fxdr_hyper(tl); 1804 toff = off; 1805 tl += 2; 1806 verf = fxdr_hyper(tl); 1807 tl += 2; 1808 siz = fxdr_unsigned(int, *tl++); 1809 cnt = fxdr_unsigned(int, *tl); 1810 1811 /* 1812 * Use the server's maximum data transfer size as the upper bound 1813 * on reply datalen. 1814 */ 1815 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1816 cnt = NFS_SRVMAXDATA(nd); 1817 1818 /* 1819 * siz is a "hint" of how much directory information (name, fileid, 1820 * cookie) should be in the reply. At least one client "hints" 0, 1821 * so I set it to cnt for that case. I also round it up to the 1822 * next multiple of DIRBLKSIZ. 1823 */ 1824 if (siz <= 0) 1825 siz = cnt; 1826 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1827 1828 if (nd->nd_flag & ND_NFSV4) { 1829 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1830 if (error) 1831 goto nfsmout; 1832 NFSSET_ATTRBIT(&savbits, &attrbits); 1833 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1834 NFSZERO_ATTRBIT(&rderrbits); 1835 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1836 } else { 1837 NFSZERO_ATTRBIT(&attrbits); 1838 } 1839 fullsiz = siz; 1840 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1841 if (!nd->nd_repstat) { 1842 if (off && verf != at.na_filerev) { 1843 /* 1844 * va_filerev is not sufficient as a cookie verifier, 1845 * since it is not supposed to change when entries are 1846 * removed/added unless that offset cookies returned to 1847 * the client are no longer valid. 1848 */ 1849 #if 0 1850 if (nd->nd_flag & ND_NFSV4) { 1851 nd->nd_repstat = NFSERR_NOTSAME; 1852 } else { 1853 nd->nd_repstat = NFSERR_BAD_COOKIE; 1854 } 1855 #endif 1856 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1857 nd->nd_repstat = NFSERR_BAD_COOKIE; 1858 } 1859 } 1860 if (!nd->nd_repstat && vp->v_type != VDIR) 1861 nd->nd_repstat = NFSERR_NOTDIR; 1862 if (!nd->nd_repstat && cnt == 0) 1863 nd->nd_repstat = NFSERR_TOOSMALL; 1864 if (!nd->nd_repstat) 1865 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1866 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1867 NFSACCCHK_VPISLOCKED, NULL); 1868 if (nd->nd_repstat) { 1869 vput(vp); 1870 if (nd->nd_flag & ND_NFSV3) 1871 nfsrv_postopattr(nd, getret, &at); 1872 goto out; 1873 } 1874 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1875 1876 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1877 again: 1878 eofflag = 0; 1879 if (cookies) { 1880 free((caddr_t)cookies, M_TEMP); 1881 cookies = NULL; 1882 } 1883 1884 iv.iov_base = rbuf; 1885 iv.iov_len = siz; 1886 io.uio_iov = &iv; 1887 io.uio_iovcnt = 1; 1888 io.uio_offset = (off_t)off; 1889 io.uio_resid = siz; 1890 io.uio_segflg = UIO_SYSSPACE; 1891 io.uio_rw = UIO_READ; 1892 io.uio_td = NULL; 1893 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1894 &cookies); 1895 off = (u_int64_t)io.uio_offset; 1896 if (io.uio_resid) 1897 siz -= io.uio_resid; 1898 1899 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1900 1901 if (!cookies && !nd->nd_repstat) 1902 nd->nd_repstat = NFSERR_PERM; 1903 if (!nd->nd_repstat) 1904 nd->nd_repstat = getret; 1905 if (nd->nd_repstat) { 1906 vput(vp); 1907 if (cookies) 1908 free((caddr_t)cookies, M_TEMP); 1909 free((caddr_t)rbuf, M_TEMP); 1910 if (nd->nd_flag & ND_NFSV3) 1911 nfsrv_postopattr(nd, getret, &at); 1912 goto out; 1913 } 1914 /* 1915 * If nothing read, return eof 1916 * rpc reply 1917 */ 1918 if (siz == 0) { 1919 vput(vp); 1920 if (nd->nd_flag & ND_NFSV3) 1921 nfsrv_postopattr(nd, getret, &at); 1922 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1923 txdr_hyper(at.na_filerev, tl); 1924 tl += 2; 1925 *tl++ = newnfs_false; 1926 *tl = newnfs_true; 1927 free((caddr_t)cookies, M_TEMP); 1928 free((caddr_t)rbuf, M_TEMP); 1929 goto out; 1930 } 1931 1932 /* 1933 * Check for degenerate cases of nothing useful read. 1934 * If so go try again 1935 */ 1936 cpos = rbuf; 1937 cend = rbuf + siz; 1938 dp = (struct dirent *)cpos; 1939 cookiep = cookies; 1940 1941 /* 1942 * For some reason FreeBSD's ufs_readdir() chooses to back the 1943 * directory offset up to a block boundary, so it is necessary to 1944 * skip over the records that precede the requested offset. This 1945 * requires the assumption that file offset cookies monotonically 1946 * increase. 1947 * Since the offset cookies don't monotonically increase for ZFS, 1948 * this is not done when ZFS is the file system. 1949 */ 1950 while (cpos < cend && ncookies > 0 && 1951 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1952 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) || 1953 ((nd->nd_flag & ND_NFSV4) && 1954 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1955 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1956 cpos += dp->d_reclen; 1957 dp = (struct dirent *)cpos; 1958 cookiep++; 1959 ncookies--; 1960 } 1961 if (cpos >= cend || ncookies == 0) { 1962 siz = fullsiz; 1963 toff = off; 1964 goto again; 1965 } 1966 1967 /* 1968 * Busy the file system so that the mount point won't go away 1969 * and, as such, VFS_VGET() can be used safely. 1970 */ 1971 mp = vp->v_mount; 1972 vfs_ref(mp); 1973 NFSVOPUNLOCK(vp, 0); 1974 nd->nd_repstat = vfs_busy(mp, 0); 1975 vfs_rel(mp); 1976 if (nd->nd_repstat != 0) { 1977 vrele(vp); 1978 free(cookies, M_TEMP); 1979 free(rbuf, M_TEMP); 1980 if (nd->nd_flag & ND_NFSV3) 1981 nfsrv_postopattr(nd, getret, &at); 1982 goto out; 1983 } 1984 1985 /* 1986 * Save this position, in case there is an error before one entry 1987 * is created. 1988 */ 1989 mb0 = nd->nd_mb; 1990 bpos0 = nd->nd_bpos; 1991 1992 /* 1993 * Fill in the first part of the reply. 1994 * dirlen is the reply length in bytes and cannot exceed cnt. 1995 * (Include the two booleans at the end of the reply in dirlen now, 1996 * so we recognize when we have exceeded cnt.) 1997 */ 1998 if (nd->nd_flag & ND_NFSV3) { 1999 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2000 nfsrv_postopattr(nd, getret, &at); 2001 } else { 2002 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2003 } 2004 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2005 txdr_hyper(at.na_filerev, tl); 2006 2007 /* 2008 * Save this position, in case there is an empty reply needed. 2009 */ 2010 mb1 = nd->nd_mb; 2011 bpos1 = nd->nd_bpos; 2012 2013 /* Loop through the records and build reply */ 2014 entrycnt = 0; 2015 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2016 nlen = dp->d_namlen; 2017 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2018 nlen <= NFS_MAXNAMLEN && 2019 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2020 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2021 || (nlen == 1 && dp->d_name[0] != '.'))) { 2022 /* 2023 * Save the current position in the reply, in case 2024 * this entry exceeds cnt. 2025 */ 2026 mb1 = nd->nd_mb; 2027 bpos1 = nd->nd_bpos; 2028 2029 /* 2030 * For readdir_and_lookup get the vnode using 2031 * the file number. 2032 */ 2033 nvp = NULL; 2034 refp = NULL; 2035 r = 0; 2036 at_root = 0; 2037 needs_unbusy = 0; 2038 new_mp = mp; 2039 mounted_on_fileno = (uint64_t)dp->d_fileno; 2040 if ((nd->nd_flag & ND_NFSV3) || 2041 NFSNONZERO_ATTRBIT(&savbits)) { 2042 if (nd->nd_flag & ND_NFSV4) 2043 refp = nfsv4root_getreferral(NULL, 2044 vp, dp->d_fileno); 2045 if (refp == NULL) { 2046 if (usevget) 2047 r = VFS_VGET(mp, dp->d_fileno, 2048 LK_SHARED, &nvp); 2049 else 2050 r = EOPNOTSUPP; 2051 if (r == EOPNOTSUPP) { 2052 if (usevget) { 2053 usevget = 0; 2054 cn.cn_nameiop = LOOKUP; 2055 cn.cn_lkflags = 2056 LK_SHARED | 2057 LK_RETRY; 2058 cn.cn_cred = 2059 nd->nd_cred; 2060 cn.cn_thread = p; 2061 } 2062 cn.cn_nameptr = dp->d_name; 2063 cn.cn_namelen = nlen; 2064 cn.cn_flags = ISLASTCN | 2065 NOFOLLOW | LOCKLEAF; 2066 if (nlen == 2 && 2067 dp->d_name[0] == '.' && 2068 dp->d_name[1] == '.') 2069 cn.cn_flags |= 2070 ISDOTDOT; 2071 if (NFSVOPLOCK(vp, LK_SHARED) 2072 != 0) { 2073 nd->nd_repstat = EPERM; 2074 break; 2075 } 2076 if ((vp->v_vflag & VV_ROOT) != 0 2077 && (cn.cn_flags & ISDOTDOT) 2078 != 0) { 2079 vref(vp); 2080 nvp = vp; 2081 r = 0; 2082 } else { 2083 r = VOP_LOOKUP(vp, &nvp, 2084 &cn); 2085 if (vp != nvp) 2086 NFSVOPUNLOCK(vp, 2087 0); 2088 } 2089 } 2090 2091 /* 2092 * For NFSv4, check to see if nvp is 2093 * a mount point and get the mount 2094 * point vnode, as required. 2095 */ 2096 if (r == 0 && 2097 nfsrv_enable_crossmntpt != 0 && 2098 (nd->nd_flag & ND_NFSV4) != 0 && 2099 nvp->v_type == VDIR && 2100 nvp->v_mountedhere != NULL) { 2101 new_mp = nvp->v_mountedhere; 2102 r = vfs_busy(new_mp, 0); 2103 vput(nvp); 2104 nvp = NULL; 2105 if (r == 0) { 2106 r = VFS_ROOT(new_mp, 2107 LK_SHARED, &nvp); 2108 needs_unbusy = 1; 2109 if (r == 0) 2110 at_root = 1; 2111 } 2112 } 2113 } 2114 if (!r) { 2115 if (refp == NULL && 2116 ((nd->nd_flag & ND_NFSV3) || 2117 NFSNONZERO_ATTRBIT(&attrbits))) { 2118 r = nfsvno_getfh(nvp, &nfh, p); 2119 if (!r) 2120 r = nfsvno_getattr(nvp, nvap, 2121 nd->nd_cred, p, 1); 2122 } 2123 } else { 2124 nvp = NULL; 2125 } 2126 if (r) { 2127 if (!NFSISSET_ATTRBIT(&attrbits, 2128 NFSATTRBIT_RDATTRERROR)) { 2129 if (nvp != NULL) 2130 vput(nvp); 2131 if (needs_unbusy != 0) 2132 vfs_unbusy(new_mp); 2133 nd->nd_repstat = r; 2134 break; 2135 } 2136 } 2137 } 2138 2139 /* 2140 * Build the directory record xdr 2141 */ 2142 if (nd->nd_flag & ND_NFSV3) { 2143 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2144 *tl++ = newnfs_true; 2145 *tl++ = 0; 2146 *tl = txdr_unsigned(dp->d_fileno); 2147 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2148 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2149 *tl++ = 0; 2150 *tl = txdr_unsigned(*cookiep); 2151 nfsrv_postopattr(nd, 0, nvap); 2152 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2153 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2154 if (nvp != NULL) 2155 vput(nvp); 2156 } else { 2157 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2158 *tl++ = newnfs_true; 2159 *tl++ = 0; 2160 *tl = txdr_unsigned(*cookiep); 2161 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2162 if (nvp != NULL) { 2163 supports_nfsv4acls = 2164 nfs_supportsnfsv4acls(nvp); 2165 NFSVOPUNLOCK(nvp, 0); 2166 } else 2167 supports_nfsv4acls = 0; 2168 if (refp != NULL) { 2169 dirlen += nfsrv_putreferralattr(nd, 2170 &savbits, refp, 0, 2171 &nd->nd_repstat); 2172 if (nd->nd_repstat) { 2173 if (nvp != NULL) 2174 vrele(nvp); 2175 if (needs_unbusy != 0) 2176 vfs_unbusy(new_mp); 2177 break; 2178 } 2179 } else if (r) { 2180 dirlen += nfsvno_fillattr(nd, new_mp, 2181 nvp, nvap, &nfh, r, &rderrbits, 2182 nd->nd_cred, p, isdgram, 0, 2183 supports_nfsv4acls, at_root, 2184 mounted_on_fileno); 2185 } else { 2186 dirlen += nfsvno_fillattr(nd, new_mp, 2187 nvp, nvap, &nfh, r, &attrbits, 2188 nd->nd_cred, p, isdgram, 0, 2189 supports_nfsv4acls, at_root, 2190 mounted_on_fileno); 2191 } 2192 if (nvp != NULL) 2193 vrele(nvp); 2194 dirlen += (3 * NFSX_UNSIGNED); 2195 } 2196 if (needs_unbusy != 0) 2197 vfs_unbusy(new_mp); 2198 if (dirlen <= cnt) 2199 entrycnt++; 2200 } 2201 cpos += dp->d_reclen; 2202 dp = (struct dirent *)cpos; 2203 cookiep++; 2204 ncookies--; 2205 } 2206 vrele(vp); 2207 vfs_unbusy(mp); 2208 2209 /* 2210 * If dirlen > cnt, we must strip off the last entry. If that 2211 * results in an empty reply, report NFSERR_TOOSMALL. 2212 */ 2213 if (dirlen > cnt || nd->nd_repstat) { 2214 if (!nd->nd_repstat && entrycnt == 0) 2215 nd->nd_repstat = NFSERR_TOOSMALL; 2216 if (nd->nd_repstat) 2217 newnfs_trimtrailing(nd, mb0, bpos0); 2218 else 2219 newnfs_trimtrailing(nd, mb1, bpos1); 2220 eofflag = 0; 2221 } else if (cpos < cend) 2222 eofflag = 0; 2223 if (!nd->nd_repstat) { 2224 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2225 *tl++ = newnfs_false; 2226 if (eofflag) 2227 *tl = newnfs_true; 2228 else 2229 *tl = newnfs_false; 2230 } 2231 FREE((caddr_t)cookies, M_TEMP); 2232 FREE((caddr_t)rbuf, M_TEMP); 2233 2234 out: 2235 NFSEXITCODE2(0, nd); 2236 return (0); 2237 nfsmout: 2238 vput(vp); 2239 NFSEXITCODE2(error, nd); 2240 return (error); 2241 } 2242 2243 /* 2244 * Get the settable attributes out of the mbuf list. 2245 * (Return 0 or EBADRPC) 2246 */ 2247 int 2248 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2249 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2250 { 2251 u_int32_t *tl; 2252 struct nfsv2_sattr *sp; 2253 int error = 0, toclient = 0; 2254 2255 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2256 case ND_NFSV2: 2257 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2258 /* 2259 * Some old clients didn't fill in the high order 16bits. 2260 * --> check the low order 2 bytes for 0xffff 2261 */ 2262 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2263 nvap->na_mode = nfstov_mode(sp->sa_mode); 2264 if (sp->sa_uid != newnfs_xdrneg1) 2265 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2266 if (sp->sa_gid != newnfs_xdrneg1) 2267 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2268 if (sp->sa_size != newnfs_xdrneg1) 2269 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2270 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2271 #ifdef notyet 2272 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2273 #else 2274 nvap->na_atime.tv_sec = 2275 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2276 nvap->na_atime.tv_nsec = 0; 2277 #endif 2278 } 2279 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2280 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2281 break; 2282 case ND_NFSV3: 2283 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2284 if (*tl == newnfs_true) { 2285 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2286 nvap->na_mode = nfstov_mode(*tl); 2287 } 2288 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2289 if (*tl == newnfs_true) { 2290 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2291 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2292 } 2293 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2294 if (*tl == newnfs_true) { 2295 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2296 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2297 } 2298 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2299 if (*tl == newnfs_true) { 2300 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2301 nvap->na_size = fxdr_hyper(tl); 2302 } 2303 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2304 switch (fxdr_unsigned(int, *tl)) { 2305 case NFSV3SATTRTIME_TOCLIENT: 2306 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2307 fxdr_nfsv3time(tl, &nvap->na_atime); 2308 toclient = 1; 2309 break; 2310 case NFSV3SATTRTIME_TOSERVER: 2311 vfs_timestamp(&nvap->na_atime); 2312 nvap->na_vaflags |= VA_UTIMES_NULL; 2313 break; 2314 }; 2315 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2316 switch (fxdr_unsigned(int, *tl)) { 2317 case NFSV3SATTRTIME_TOCLIENT: 2318 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2319 fxdr_nfsv3time(tl, &nvap->na_mtime); 2320 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2321 break; 2322 case NFSV3SATTRTIME_TOSERVER: 2323 vfs_timestamp(&nvap->na_mtime); 2324 if (!toclient) 2325 nvap->na_vaflags |= VA_UTIMES_NULL; 2326 break; 2327 }; 2328 break; 2329 case ND_NFSV4: 2330 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2331 }; 2332 nfsmout: 2333 NFSEXITCODE2(error, nd); 2334 return (error); 2335 } 2336 2337 /* 2338 * Handle the setable attributes for V4. 2339 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2340 */ 2341 int 2342 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2343 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2344 { 2345 u_int32_t *tl; 2346 int attrsum = 0; 2347 int i, j; 2348 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2349 int toclient = 0; 2350 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2351 uid_t uid; 2352 gid_t gid; 2353 2354 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2355 if (error) 2356 goto nfsmout; 2357 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2358 attrsize = fxdr_unsigned(int, *tl); 2359 2360 /* 2361 * Loop around getting the setable attributes. If an unsupported 2362 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2363 */ 2364 if (retnotsup) { 2365 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2366 bitpos = NFSATTRBIT_MAX; 2367 } else { 2368 bitpos = 0; 2369 } 2370 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2371 if (attrsum > attrsize) { 2372 error = NFSERR_BADXDR; 2373 goto nfsmout; 2374 } 2375 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2376 switch (bitpos) { 2377 case NFSATTRBIT_SIZE: 2378 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2379 nvap->na_size = fxdr_hyper(tl); 2380 attrsum += NFSX_HYPER; 2381 break; 2382 case NFSATTRBIT_ACL: 2383 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2384 p); 2385 if (error) 2386 goto nfsmout; 2387 if (aceerr && !nd->nd_repstat) 2388 nd->nd_repstat = aceerr; 2389 attrsum += aclsize; 2390 break; 2391 case NFSATTRBIT_ARCHIVE: 2392 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2393 if (!nd->nd_repstat) 2394 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2395 attrsum += NFSX_UNSIGNED; 2396 break; 2397 case NFSATTRBIT_HIDDEN: 2398 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2399 if (!nd->nd_repstat) 2400 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2401 attrsum += NFSX_UNSIGNED; 2402 break; 2403 case NFSATTRBIT_MIMETYPE: 2404 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2405 i = fxdr_unsigned(int, *tl); 2406 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2407 if (error) 2408 goto nfsmout; 2409 if (!nd->nd_repstat) 2410 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2411 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2412 break; 2413 case NFSATTRBIT_MODE: 2414 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2415 nvap->na_mode = nfstov_mode(*tl); 2416 attrsum += NFSX_UNSIGNED; 2417 break; 2418 case NFSATTRBIT_OWNER: 2419 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2420 j = fxdr_unsigned(int, *tl); 2421 if (j < 0) { 2422 error = NFSERR_BADXDR; 2423 goto nfsmout; 2424 } 2425 if (j > NFSV4_SMALLSTR) 2426 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2427 else 2428 cp = namestr; 2429 error = nfsrv_mtostr(nd, cp, j); 2430 if (error) { 2431 if (j > NFSV4_SMALLSTR) 2432 free(cp, M_NFSSTRING); 2433 goto nfsmout; 2434 } 2435 if (!nd->nd_repstat) { 2436 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2437 p); 2438 if (!nd->nd_repstat) 2439 nvap->na_uid = uid; 2440 } 2441 if (j > NFSV4_SMALLSTR) 2442 free(cp, M_NFSSTRING); 2443 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2444 break; 2445 case NFSATTRBIT_OWNERGROUP: 2446 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2447 j = fxdr_unsigned(int, *tl); 2448 if (j < 0) { 2449 error = NFSERR_BADXDR; 2450 goto nfsmout; 2451 } 2452 if (j > NFSV4_SMALLSTR) 2453 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2454 else 2455 cp = namestr; 2456 error = nfsrv_mtostr(nd, cp, j); 2457 if (error) { 2458 if (j > NFSV4_SMALLSTR) 2459 free(cp, M_NFSSTRING); 2460 goto nfsmout; 2461 } 2462 if (!nd->nd_repstat) { 2463 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2464 p); 2465 if (!nd->nd_repstat) 2466 nvap->na_gid = gid; 2467 } 2468 if (j > NFSV4_SMALLSTR) 2469 free(cp, M_NFSSTRING); 2470 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2471 break; 2472 case NFSATTRBIT_SYSTEM: 2473 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2474 if (!nd->nd_repstat) 2475 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2476 attrsum += NFSX_UNSIGNED; 2477 break; 2478 case NFSATTRBIT_TIMEACCESSSET: 2479 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2480 attrsum += NFSX_UNSIGNED; 2481 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2482 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2483 fxdr_nfsv4time(tl, &nvap->na_atime); 2484 toclient = 1; 2485 attrsum += NFSX_V4TIME; 2486 } else { 2487 vfs_timestamp(&nvap->na_atime); 2488 nvap->na_vaflags |= VA_UTIMES_NULL; 2489 } 2490 break; 2491 case NFSATTRBIT_TIMEBACKUP: 2492 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2493 if (!nd->nd_repstat) 2494 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2495 attrsum += NFSX_V4TIME; 2496 break; 2497 case NFSATTRBIT_TIMECREATE: 2498 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2499 if (!nd->nd_repstat) 2500 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2501 attrsum += NFSX_V4TIME; 2502 break; 2503 case NFSATTRBIT_TIMEMODIFYSET: 2504 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2505 attrsum += NFSX_UNSIGNED; 2506 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2507 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2508 fxdr_nfsv4time(tl, &nvap->na_mtime); 2509 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2510 attrsum += NFSX_V4TIME; 2511 } else { 2512 vfs_timestamp(&nvap->na_mtime); 2513 if (!toclient) 2514 nvap->na_vaflags |= VA_UTIMES_NULL; 2515 } 2516 break; 2517 default: 2518 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2519 /* 2520 * set bitpos so we drop out of the loop. 2521 */ 2522 bitpos = NFSATTRBIT_MAX; 2523 break; 2524 }; 2525 } 2526 2527 /* 2528 * some clients pad the attrlist, so we need to skip over the 2529 * padding. 2530 */ 2531 if (attrsum > attrsize) { 2532 error = NFSERR_BADXDR; 2533 } else { 2534 attrsize = NFSM_RNDUP(attrsize); 2535 if (attrsum < attrsize) 2536 error = nfsm_advance(nd, attrsize - attrsum, -1); 2537 } 2538 nfsmout: 2539 NFSEXITCODE2(error, nd); 2540 return (error); 2541 } 2542 2543 /* 2544 * Check/setup export credentials. 2545 */ 2546 int 2547 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2548 struct ucred *credanon) 2549 { 2550 int error = 0; 2551 2552 /* 2553 * Check/setup credentials. 2554 */ 2555 if (nd->nd_flag & ND_GSS) 2556 exp->nes_exflag &= ~MNT_EXPORTANON; 2557 2558 /* 2559 * Check to see if the operation is allowed for this security flavor. 2560 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2561 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2562 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2563 */ 2564 if (nfsvno_testexp(nd, exp) && 2565 nd->nd_procnum != NFSV4OP_SECINFO && 2566 nd->nd_procnum != NFSPROC_FSINFO) { 2567 if (nd->nd_flag & ND_NFSV4) 2568 error = NFSERR_WRONGSEC; 2569 else 2570 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2571 goto out; 2572 } 2573 2574 /* 2575 * Check to see if the file system is exported V4 only. 2576 */ 2577 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2578 error = NFSERR_PROGNOTV4; 2579 goto out; 2580 } 2581 2582 /* 2583 * Now, map the user credentials. 2584 * (Note that ND_AUTHNONE will only be set for an NFSv3 2585 * Fsinfo RPC. If set for anything else, this code might need 2586 * to change.) 2587 */ 2588 if (NFSVNO_EXPORTED(exp) && 2589 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) || 2590 NFSVNO_EXPORTANON(exp) || 2591 (nd->nd_flag & ND_AUTHNONE))) { 2592 nd->nd_cred->cr_uid = credanon->cr_uid; 2593 nd->nd_cred->cr_gid = credanon->cr_gid; 2594 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2595 credanon->cr_groups); 2596 } 2597 2598 out: 2599 NFSEXITCODE2(error, nd); 2600 return (error); 2601 } 2602 2603 /* 2604 * Check exports. 2605 */ 2606 int 2607 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2608 struct ucred **credp) 2609 { 2610 int i, error, *secflavors; 2611 2612 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2613 &exp->nes_numsecflavor, &secflavors); 2614 if (error) { 2615 if (nfs_rootfhset) { 2616 exp->nes_exflag = 0; 2617 exp->nes_numsecflavor = 0; 2618 error = 0; 2619 } 2620 } else { 2621 /* Copy the security flavors. */ 2622 for (i = 0; i < exp->nes_numsecflavor; i++) 2623 exp->nes_secflavors[i] = secflavors[i]; 2624 } 2625 NFSEXITCODE(error); 2626 return (error); 2627 } 2628 2629 /* 2630 * Get a vnode for a file handle and export stuff. 2631 */ 2632 int 2633 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2634 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2635 struct ucred **credp) 2636 { 2637 int i, error, *secflavors; 2638 2639 *credp = NULL; 2640 exp->nes_numsecflavor = 0; 2641 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2642 if (error != 0) 2643 /* Make sure the server replies ESTALE to the client. */ 2644 error = ESTALE; 2645 if (nam && !error) { 2646 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2647 &exp->nes_numsecflavor, &secflavors); 2648 if (error) { 2649 if (nfs_rootfhset) { 2650 exp->nes_exflag = 0; 2651 exp->nes_numsecflavor = 0; 2652 error = 0; 2653 } else { 2654 vput(*vpp); 2655 } 2656 } else { 2657 /* Copy the security flavors. */ 2658 for (i = 0; i < exp->nes_numsecflavor; i++) 2659 exp->nes_secflavors[i] = secflavors[i]; 2660 } 2661 } 2662 NFSEXITCODE(error); 2663 return (error); 2664 } 2665 2666 /* 2667 * nfsd_fhtovp() - convert a fh to a vnode ptr 2668 * - look up fsid in mount list (if not found ret error) 2669 * - get vp and export rights by calling nfsvno_fhtovp() 2670 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2671 * for AUTH_SYS 2672 * - if mpp != NULL, return the mount point so that it can 2673 * be used for vn_finished_write() by the caller 2674 */ 2675 void 2676 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2677 struct vnode **vpp, struct nfsexstuff *exp, 2678 struct mount **mpp, int startwrite, struct thread *p) 2679 { 2680 struct mount *mp; 2681 struct ucred *credanon; 2682 fhandle_t *fhp; 2683 2684 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2685 /* 2686 * Check for the special case of the nfsv4root_fh. 2687 */ 2688 mp = vfs_busyfs(&fhp->fh_fsid); 2689 if (mpp != NULL) 2690 *mpp = mp; 2691 if (mp == NULL) { 2692 *vpp = NULL; 2693 nd->nd_repstat = ESTALE; 2694 goto out; 2695 } 2696 2697 if (startwrite) { 2698 vn_start_write(NULL, mpp, V_WAIT); 2699 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2700 lktype = LK_EXCLUSIVE; 2701 } 2702 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2703 &credanon); 2704 vfs_unbusy(mp); 2705 2706 /* 2707 * For NFSv4 without a pseudo root fs, unexported file handles 2708 * can be returned, so that Lookup works everywhere. 2709 */ 2710 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2711 !(nd->nd_flag & ND_NFSV4)) { 2712 vput(*vpp); 2713 nd->nd_repstat = EACCES; 2714 } 2715 2716 /* 2717 * Personally, I've never seen any point in requiring a 2718 * reserved port#, since only in the rare case where the 2719 * clients are all boxes with secure system priviledges, 2720 * does it provide any enhanced security, but... some people 2721 * believe it to be useful and keep putting this code back in. 2722 * (There is also some "security checker" out there that 2723 * complains if the nfs server doesn't enforce this.) 2724 * However, note the following: 2725 * RFC3530 (NFSv4) specifies that a reserved port# not be 2726 * required. 2727 * RFC2623 recommends that, if a reserved port# is checked for, 2728 * that there be a way to turn that off--> ifdef'd. 2729 */ 2730 #ifdef NFS_REQRSVPORT 2731 if (!nd->nd_repstat) { 2732 struct sockaddr_in *saddr; 2733 struct sockaddr_in6 *saddr6; 2734 2735 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2736 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2737 if (!(nd->nd_flag & ND_NFSV4) && 2738 ((saddr->sin_family == AF_INET && 2739 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2740 (saddr6->sin6_family == AF_INET6 && 2741 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2742 vput(*vpp); 2743 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2744 } 2745 } 2746 #endif /* NFS_REQRSVPORT */ 2747 2748 /* 2749 * Check/setup credentials. 2750 */ 2751 if (!nd->nd_repstat) { 2752 nd->nd_saveduid = nd->nd_cred->cr_uid; 2753 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2754 if (nd->nd_repstat) 2755 vput(*vpp); 2756 } 2757 if (credanon != NULL) 2758 crfree(credanon); 2759 if (nd->nd_repstat) { 2760 if (startwrite) 2761 vn_finished_write(mp); 2762 *vpp = NULL; 2763 if (mpp != NULL) 2764 *mpp = NULL; 2765 } 2766 2767 out: 2768 NFSEXITCODE2(0, nd); 2769 } 2770 2771 /* 2772 * glue for fp. 2773 */ 2774 static int 2775 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2776 { 2777 struct filedesc *fdp; 2778 struct file *fp; 2779 int error = 0; 2780 2781 fdp = p->td_proc->p_fd; 2782 if (fd < 0 || fd >= fdp->fd_nfiles || 2783 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2784 error = EBADF; 2785 goto out; 2786 } 2787 *fpp = fp; 2788 2789 out: 2790 NFSEXITCODE(error); 2791 return (error); 2792 } 2793 2794 /* 2795 * Called from nfssvc() to update the exports list. Just call 2796 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2797 * in the mount list. 2798 */ 2799 int 2800 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2801 { 2802 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2803 int error = 0; 2804 struct nameidata nd; 2805 fhandle_t fh; 2806 2807 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2808 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2809 nfs_rootfhset = 0; 2810 else if (error == 0) { 2811 if (nfsexargp->fspec == NULL) { 2812 error = EPERM; 2813 goto out; 2814 } 2815 /* 2816 * If fspec != NULL, this is the v4root path. 2817 */ 2818 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2819 nfsexargp->fspec, p); 2820 if ((error = namei(&nd)) != 0) 2821 goto out; 2822 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2823 vrele(nd.ni_vp); 2824 if (!error) { 2825 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2826 NFSBCOPY((caddr_t)&fh, 2827 nfs_rootfh.nfsrvfh_data, 2828 sizeof (fhandle_t)); 2829 nfs_rootfhset = 1; 2830 } 2831 } 2832 2833 out: 2834 NFSEXITCODE(error); 2835 return (error); 2836 } 2837 2838 /* 2839 * Get the tcp socket sequence numbers we need. 2840 * (Maybe this should be moved to the tcp sources?) 2841 */ 2842 int 2843 nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap) 2844 { 2845 struct inpcb *inp; 2846 struct tcpcb *tp; 2847 int error = 0; 2848 2849 inp = sotoinpcb(so); 2850 KASSERT(inp != NULL, ("nfsrv_getsocksndseq: inp == NULL")); 2851 INP_RLOCK(inp); 2852 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 2853 INP_RUNLOCK(inp); 2854 error = EPIPE; 2855 goto out; 2856 } 2857 tp = intotcpcb(inp); 2858 if (tp->t_state != TCPS_ESTABLISHED) { 2859 INP_RUNLOCK(inp); 2860 error = EPIPE; 2861 goto out; 2862 } 2863 *maxp = tp->snd_max; 2864 *unap = tp->snd_una; 2865 INP_RUNLOCK(inp); 2866 2867 out: 2868 NFSEXITCODE(error); 2869 return (error); 2870 } 2871 2872 /* 2873 * This function needs to test to see if the system is near its limit 2874 * for memory allocation via malloc() or mget() and return True iff 2875 * either of these resources are near their limit. 2876 * XXX (For now, this is just a stub.) 2877 */ 2878 int nfsrv_testmalloclimit = 0; 2879 int 2880 nfsrv_mallocmget_limit(void) 2881 { 2882 static int printmesg = 0; 2883 static int testval = 1; 2884 2885 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2886 if ((printmesg++ % 100) == 0) 2887 printf("nfsd: malloc/mget near limit\n"); 2888 return (1); 2889 } 2890 return (0); 2891 } 2892 2893 /* 2894 * BSD specific initialization of a mount point. 2895 */ 2896 void 2897 nfsd_mntinit(void) 2898 { 2899 static int inited = 0; 2900 2901 if (inited) 2902 return; 2903 inited = 1; 2904 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2905 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2906 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2907 nfsv4root_mnt.mnt_export = NULL; 2908 TAILQ_INIT(&nfsv4root_opt); 2909 TAILQ_INIT(&nfsv4root_newopt); 2910 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2911 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2912 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2913 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2914 } 2915 2916 /* 2917 * Get a vnode for a file handle, without checking exports, etc. 2918 */ 2919 struct vnode * 2920 nfsvno_getvp(fhandle_t *fhp) 2921 { 2922 struct mount *mp; 2923 struct vnode *vp; 2924 int error; 2925 2926 mp = vfs_busyfs(&fhp->fh_fsid); 2927 if (mp == NULL) 2928 return (NULL); 2929 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2930 vfs_unbusy(mp); 2931 if (error) 2932 return (NULL); 2933 return (vp); 2934 } 2935 2936 /* 2937 * Do a local VOP_ADVLOCK(). 2938 */ 2939 int 2940 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2941 u_int64_t end, struct thread *td) 2942 { 2943 int error = 0; 2944 struct flock fl; 2945 u_int64_t tlen; 2946 2947 if (nfsrv_dolocallocks == 0) 2948 goto out; 2949 2950 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */ 2951 if ((vp->v_iflag & VI_DOOMED) != 0) { 2952 error = EPERM; 2953 goto out; 2954 } 2955 2956 fl.l_whence = SEEK_SET; 2957 fl.l_type = ftype; 2958 fl.l_start = (off_t)first; 2959 if (end == NFS64BITSSET) { 2960 fl.l_len = 0; 2961 } else { 2962 tlen = end - first; 2963 fl.l_len = (off_t)tlen; 2964 } 2965 /* 2966 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2967 * values for all calls, so that all locks will be held by the 2968 * nfsd server. (The nfsd server handles conflicts between the 2969 * various clients.) 2970 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2971 * bytes, so it can't be put in l_sysid. 2972 */ 2973 if (nfsv4_sysid == 0) 2974 nfsv4_sysid = nlm_acquire_next_sysid(); 2975 fl.l_pid = (pid_t)0; 2976 fl.l_sysid = (int)nfsv4_sysid; 2977 2978 NFSVOPUNLOCK(vp, 0); 2979 if (ftype == F_UNLCK) 2980 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 2981 (F_POSIX | F_REMOTE)); 2982 else 2983 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 2984 (F_POSIX | F_REMOTE)); 2985 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2986 2987 out: 2988 NFSEXITCODE(error); 2989 return (error); 2990 } 2991 2992 /* 2993 * Check the nfsv4 root exports. 2994 */ 2995 int 2996 nfsvno_v4rootexport(struct nfsrv_descript *nd) 2997 { 2998 struct ucred *credanon; 2999 int exflags, error = 0, numsecflavor, *secflavors, i; 3000 3001 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3002 &credanon, &numsecflavor, &secflavors); 3003 if (error) { 3004 error = NFSERR_PROGUNAVAIL; 3005 goto out; 3006 } 3007 if (credanon != NULL) 3008 crfree(credanon); 3009 for (i = 0; i < numsecflavor; i++) { 3010 if (secflavors[i] == AUTH_SYS) 3011 nd->nd_flag |= ND_EXAUTHSYS; 3012 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3013 nd->nd_flag |= ND_EXGSS; 3014 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3015 nd->nd_flag |= ND_EXGSSINTEGRITY; 3016 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3017 nd->nd_flag |= ND_EXGSSPRIVACY; 3018 } 3019 3020 out: 3021 NFSEXITCODE(error); 3022 return (error); 3023 } 3024 3025 /* 3026 * Nfs server psuedo system call for the nfsd's 3027 */ 3028 /* 3029 * MPSAFE 3030 */ 3031 static int 3032 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3033 { 3034 struct file *fp; 3035 struct nfsd_addsock_args sockarg; 3036 struct nfsd_nfsd_args nfsdarg; 3037 int error; 3038 3039 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3040 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3041 if (error) 3042 goto out; 3043 /* 3044 * Since we don't know what rights might be required, 3045 * pretend that we need them all. It is better to be too 3046 * careful than too reckless. 3047 */ 3048 if ((error = fget(td, sockarg.sock, CAP_SOCK_SERVER, &fp)) != 0) 3049 goto out; 3050 if (fp->f_type != DTYPE_SOCKET) { 3051 fdrop(fp, td); 3052 error = EPERM; 3053 goto out; 3054 } 3055 error = nfsrvd_addsock(fp); 3056 fdrop(fp, td); 3057 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3058 if (uap->argp == NULL) { 3059 error = EINVAL; 3060 goto out; 3061 } 3062 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3063 sizeof (nfsdarg)); 3064 if (error) 3065 goto out; 3066 error = nfsrvd_nfsd(td, &nfsdarg); 3067 } else { 3068 error = nfssvc_srvcall(td, uap, td->td_ucred); 3069 } 3070 3071 out: 3072 NFSEXITCODE(error); 3073 return (error); 3074 } 3075 3076 static int 3077 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3078 { 3079 struct nfsex_args export; 3080 struct file *fp = NULL; 3081 int stablefd, len; 3082 struct nfsd_clid adminrevoke; 3083 struct nfsd_dumplist dumplist; 3084 struct nfsd_dumpclients *dumpclients; 3085 struct nfsd_dumplocklist dumplocklist; 3086 struct nfsd_dumplocks *dumplocks; 3087 struct nameidata nd; 3088 vnode_t vp; 3089 int error = EINVAL, igotlock; 3090 struct proc *procp; 3091 static int suspend_nfsd = 0; 3092 3093 if (uap->flag & NFSSVC_PUBLICFH) { 3094 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3095 sizeof (fhandle_t)); 3096 error = copyin(uap->argp, 3097 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3098 if (!error) 3099 nfs_pubfhset = 1; 3100 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3101 error = copyin(uap->argp,(caddr_t)&export, 3102 sizeof (struct nfsex_args)); 3103 if (!error) 3104 error = nfsrv_v4rootexport(&export, cred, p); 3105 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3106 nfs_pubfhset = 0; 3107 error = 0; 3108 } else if (uap->flag & NFSSVC_STABLERESTART) { 3109 error = copyin(uap->argp, (caddr_t)&stablefd, 3110 sizeof (int)); 3111 if (!error) 3112 error = fp_getfvp(p, stablefd, &fp, &vp); 3113 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3114 error = EBADF; 3115 if (!error && newnfs_numnfsd != 0) 3116 error = EPERM; 3117 if (!error) { 3118 nfsrv_stablefirst.nsf_fp = fp; 3119 nfsrv_setupstable(p); 3120 } 3121 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3122 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3123 sizeof (struct nfsd_clid)); 3124 if (!error) 3125 error = nfsrv_adminrevoke(&adminrevoke, p); 3126 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3127 error = copyin(uap->argp, (caddr_t)&dumplist, 3128 sizeof (struct nfsd_dumplist)); 3129 if (!error && (dumplist.ndl_size < 1 || 3130 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3131 error = EPERM; 3132 if (!error) { 3133 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3134 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3135 M_TEMP, M_WAITOK); 3136 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3137 error = copyout(dumpclients, 3138 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3139 free((caddr_t)dumpclients, M_TEMP); 3140 } 3141 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3142 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3143 sizeof (struct nfsd_dumplocklist)); 3144 if (!error && (dumplocklist.ndllck_size < 1 || 3145 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3146 error = EPERM; 3147 if (!error) 3148 error = nfsrv_lookupfilename(&nd, 3149 dumplocklist.ndllck_fname, p); 3150 if (!error) { 3151 len = sizeof (struct nfsd_dumplocks) * 3152 dumplocklist.ndllck_size; 3153 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3154 M_TEMP, M_WAITOK); 3155 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3156 dumplocklist.ndllck_size, p); 3157 vput(nd.ni_vp); 3158 error = copyout(dumplocks, 3159 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3160 free((caddr_t)dumplocks, M_TEMP); 3161 } 3162 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3163 procp = p->td_proc; 3164 PROC_LOCK(procp); 3165 nfsd_master_pid = procp->p_pid; 3166 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3167 nfsd_master_start = procp->p_stats->p_start; 3168 nfsd_master_proc = procp; 3169 PROC_UNLOCK(procp); 3170 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3171 NFSLOCKV4ROOTMUTEX(); 3172 if (suspend_nfsd == 0) { 3173 /* Lock out all nfsd threads */ 3174 do { 3175 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3176 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3177 } while (igotlock == 0 && suspend_nfsd == 0); 3178 suspend_nfsd = 1; 3179 } 3180 NFSUNLOCKV4ROOTMUTEX(); 3181 error = 0; 3182 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3183 NFSLOCKV4ROOTMUTEX(); 3184 if (suspend_nfsd != 0) { 3185 nfsv4_unlock(&nfsd_suspend_lock, 0); 3186 suspend_nfsd = 0; 3187 } 3188 NFSUNLOCKV4ROOTMUTEX(); 3189 error = 0; 3190 } 3191 3192 NFSEXITCODE(error); 3193 return (error); 3194 } 3195 3196 /* 3197 * Check exports. 3198 * Returns 0 if ok, 1 otherwise. 3199 */ 3200 int 3201 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3202 { 3203 int i; 3204 3205 /* 3206 * This seems odd, but allow the case where the security flavor 3207 * list is empty. This happens when NFSv4 is traversing non-exported 3208 * file systems. Exported file systems should always have a non-empty 3209 * security flavor list. 3210 */ 3211 if (exp->nes_numsecflavor == 0) 3212 return (0); 3213 3214 for (i = 0; i < exp->nes_numsecflavor; i++) { 3215 /* 3216 * The tests for privacy and integrity must be first, 3217 * since ND_GSS is set for everything but AUTH_SYS. 3218 */ 3219 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3220 (nd->nd_flag & ND_GSSPRIVACY)) 3221 return (0); 3222 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3223 (nd->nd_flag & ND_GSSINTEGRITY)) 3224 return (0); 3225 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3226 (nd->nd_flag & ND_GSS)) 3227 return (0); 3228 if (exp->nes_secflavors[i] == AUTH_SYS && 3229 (nd->nd_flag & ND_GSS) == 0) 3230 return (0); 3231 } 3232 return (1); 3233 } 3234 3235 /* 3236 * Calculate a hash value for the fid in a file handle. 3237 */ 3238 uint32_t 3239 nfsrv_hashfh(fhandle_t *fhp) 3240 { 3241 uint32_t hashval; 3242 3243 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3244 return (hashval); 3245 } 3246 3247 /* 3248 * Signal the userland master nfsd to backup the stable restart file. 3249 */ 3250 void 3251 nfsrv_backupstable(void) 3252 { 3253 struct proc *procp; 3254 3255 if (nfsd_master_proc != NULL) { 3256 procp = pfind(nfsd_master_pid); 3257 /* Try to make sure it is the correct process. */ 3258 if (procp == nfsd_master_proc && 3259 procp->p_stats->p_start.tv_sec == 3260 nfsd_master_start.tv_sec && 3261 procp->p_stats->p_start.tv_usec == 3262 nfsd_master_start.tv_usec && 3263 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3264 kern_psignal(procp, SIGUSR2); 3265 else 3266 nfsd_master_proc = NULL; 3267 3268 if (procp != NULL) 3269 PROC_UNLOCK(procp); 3270 } 3271 } 3272 3273 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3274 3275 /* 3276 * Called once to initialize data structures... 3277 */ 3278 static int 3279 nfsd_modevent(module_t mod, int type, void *data) 3280 { 3281 int error = 0; 3282 static int loaded = 0; 3283 3284 switch (type) { 3285 case MOD_LOAD: 3286 if (loaded) 3287 goto out; 3288 newnfs_portinit(); 3289 mtx_init(&nfs_cache_mutex, "nfs_cache_mutex", NULL, MTX_DEF); 3290 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF); 3291 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL, 3292 MTX_DEF); 3293 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3294 nfsrvd_initcache(); 3295 nfsd_init(); 3296 NFSD_LOCK(); 3297 nfsrvd_init(0); 3298 NFSD_UNLOCK(); 3299 nfsd_mntinit(); 3300 #ifdef VV_DISABLEDELEG 3301 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3302 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3303 #endif 3304 nfsd_call_servertimer = nfsrv_servertimer; 3305 nfsd_call_nfsd = nfssvc_nfsd; 3306 loaded = 1; 3307 break; 3308 3309 case MOD_UNLOAD: 3310 if (newnfs_numnfsd != 0) { 3311 error = EBUSY; 3312 break; 3313 } 3314 3315 #ifdef VV_DISABLEDELEG 3316 vn_deleg_ops.vndeleg_recall = NULL; 3317 vn_deleg_ops.vndeleg_disable = NULL; 3318 #endif 3319 nfsd_call_servertimer = NULL; 3320 nfsd_call_nfsd = NULL; 3321 3322 /* Clean out all NFSv4 state. */ 3323 nfsrv_throwawayallstate(curthread); 3324 3325 /* Clean the NFS server reply cache */ 3326 nfsrvd_cleancache(); 3327 3328 /* Free up the krpc server pool. */ 3329 if (nfsrvd_pool != NULL) 3330 svcpool_destroy(nfsrvd_pool); 3331 3332 /* and get rid of the locks */ 3333 mtx_destroy(&nfs_cache_mutex); 3334 mtx_destroy(&nfs_v4root_mutex); 3335 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3336 lockdestroy(&nfsv4root_mnt.mnt_explock); 3337 loaded = 0; 3338 break; 3339 default: 3340 error = EOPNOTSUPP; 3341 break; 3342 } 3343 3344 out: 3345 NFSEXITCODE(error); 3346 return (error); 3347 } 3348 static moduledata_t nfsd_mod = { 3349 "nfsd", 3350 nfsd_modevent, 3351 NULL, 3352 }; 3353 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3354 3355 /* So that loader and kldload(2) can find us, wherever we are.. */ 3356 MODULE_VERSION(nfsd, 1); 3357 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3358 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3359 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3360 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3361 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3362 3363