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