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