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