1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/capability.h> 38 39 /* 40 * Functions that perform the vfs operations required by the routines in 41 * nfsd_serv.c. It is hoped that this change will make the server more 42 * portable. 43 */ 44 45 #include <fs/nfs/nfsport.h> 46 #include <sys/hash.h> 47 #include <sys/sysctl.h> 48 #include <nlm/nlm_prot.h> 49 #include <nlm/nlm.h> 50 51 FEATURE(nfsd, "NFSv4 server"); 52 53 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 54 extern int nfsrv_useacl; 55 extern int newnfs_numnfsd; 56 extern struct mount nfsv4root_mnt; 57 extern struct nfsrv_stablefirst nfsrv_stablefirst; 58 extern void (*nfsd_call_servertimer)(void); 59 extern SVCPOOL *nfsrvd_pool; 60 extern struct nfsv4lock nfsd_suspend_lock; 61 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 62 NFSDLOCKMUTEX; 63 struct mtx nfs_cache_mutex; 64 struct mtx nfs_v4root_mutex; 65 struct nfsrvfh nfs_rootfh, nfs_pubfh; 66 int nfs_pubfhset = 0, nfs_rootfhset = 0; 67 struct proc *nfsd_master_proc = NULL; 68 static pid_t nfsd_master_pid = (pid_t)-1; 69 static char nfsd_master_comm[MAXCOMLEN + 1]; 70 static struct timeval nfsd_master_start; 71 static uint32_t nfsv4_sysid = 0; 72 73 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 74 struct ucred *); 75 76 int nfsrv_enable_crossmntpt = 1; 77 static int nfs_commit_blks; 78 static int nfs_commit_miss; 79 extern int nfsrv_issuedelegs; 80 extern int nfsrv_dolocallocks; 81 82 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server"); 83 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 84 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 85 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 86 0, ""); 87 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 88 0, ""); 89 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 90 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 91 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 92 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 93 94 #define MAX_REORDERED_RPC 16 95 #define NUM_HEURISTIC 1031 96 #define NHUSE_INIT 64 97 #define NHUSE_INC 16 98 #define NHUSE_MAX 2048 99 100 static struct nfsheur { 101 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 102 off_t nh_nextoff; /* next offset for sequential detection */ 103 int nh_use; /* use count for selection */ 104 int nh_seqcount; /* heuristic */ 105 } nfsheur[NUM_HEURISTIC]; 106 107 108 /* 109 * Heuristic to detect sequential operation. 110 */ 111 static struct nfsheur * 112 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 113 { 114 struct nfsheur *nh; 115 int hi, try; 116 117 /* Locate best candidate. */ 118 try = 32; 119 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 120 nh = &nfsheur[hi]; 121 while (try--) { 122 if (nfsheur[hi].nh_vp == vp) { 123 nh = &nfsheur[hi]; 124 break; 125 } 126 if (nfsheur[hi].nh_use > 0) 127 --nfsheur[hi].nh_use; 128 hi = (hi + 1) % NUM_HEURISTIC; 129 if (nfsheur[hi].nh_use < nh->nh_use) 130 nh = &nfsheur[hi]; 131 } 132 133 /* Initialize hint if this is a new file. */ 134 if (nh->nh_vp != vp) { 135 nh->nh_vp = vp; 136 nh->nh_nextoff = uio->uio_offset; 137 nh->nh_use = NHUSE_INIT; 138 if (uio->uio_offset == 0) 139 nh->nh_seqcount = 4; 140 else 141 nh->nh_seqcount = 1; 142 } 143 144 /* Calculate heuristic. */ 145 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 146 uio->uio_offset == nh->nh_nextoff) { 147 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 148 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 149 if (nh->nh_seqcount > IO_SEQMAX) 150 nh->nh_seqcount = IO_SEQMAX; 151 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 152 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 153 /* Probably a reordered RPC, leave seqcount alone. */ 154 } else if (nh->nh_seqcount > 1) { 155 nh->nh_seqcount /= 2; 156 } else { 157 nh->nh_seqcount = 0; 158 } 159 nh->nh_use += NHUSE_INC; 160 if (nh->nh_use > NHUSE_MAX) 161 nh->nh_use = NHUSE_MAX; 162 return (nh); 163 } 164 165 /* 166 * Get attributes into nfsvattr structure. 167 */ 168 int 169 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 170 struct thread *p, int vpislocked) 171 { 172 int error, lockedit = 0; 173 174 if (vpislocked == 0) { 175 /* 176 * When vpislocked == 0, the vnode is either exclusively 177 * locked by this thread or not locked by this thread. 178 * As such, shared lock it, if not exclusively locked. 179 */ 180 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 181 lockedit = 1; 182 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 183 } 184 } 185 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 186 if (lockedit != 0) 187 NFSVOPUNLOCK(vp, 0); 188 189 NFSEXITCODE(error); 190 return (error); 191 } 192 193 /* 194 * Get a file handle for a vnode. 195 */ 196 int 197 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 198 { 199 int error; 200 201 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 202 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 203 error = VOP_VPTOFH(vp, &fhp->fh_fid); 204 205 NFSEXITCODE(error); 206 return (error); 207 } 208 209 /* 210 * Perform access checking for vnodes obtained from file handles that would 211 * refer to files already opened by a Unix client. You cannot just use 212 * vn_writechk() and VOP_ACCESSX() for two reasons. 213 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 214 * case. 215 * 2 - The owner is to be given access irrespective of mode bits for some 216 * operations, so that processes that chmod after opening a file don't 217 * break. 218 */ 219 int 220 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 221 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 222 u_int32_t *supportedtypep) 223 { 224 struct vattr vattr; 225 int error = 0, getret = 0; 226 227 if (vpislocked == 0) { 228 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 229 error = EPERM; 230 goto out; 231 } 232 } 233 if (accmode & VWRITE) { 234 /* Just vn_writechk() changed to check rdonly */ 235 /* 236 * Disallow write attempts on read-only file systems; 237 * unless the file is a socket or a block or character 238 * device resident on the file system. 239 */ 240 if (NFSVNO_EXRDONLY(exp) || 241 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 242 switch (vp->v_type) { 243 case VREG: 244 case VDIR: 245 case VLNK: 246 error = EROFS; 247 default: 248 break; 249 } 250 } 251 /* 252 * If there's shared text associated with 253 * the inode, try to free it up once. If 254 * we fail, we can't allow writing. 255 */ 256 if (VOP_IS_TEXT(vp) && error == 0) 257 error = ETXTBSY; 258 } 259 if (error != 0) { 260 if (vpislocked == 0) 261 NFSVOPUNLOCK(vp, 0); 262 goto out; 263 } 264 265 /* 266 * Should the override still be applied when ACLs are enabled? 267 */ 268 error = VOP_ACCESSX(vp, accmode, cred, p); 269 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 270 /* 271 * Try again with VEXPLICIT_DENY, to see if the test for 272 * deletion is supported. 273 */ 274 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 275 if (error == 0) { 276 if (vp->v_type == VDIR) { 277 accmode &= ~(VDELETE | VDELETE_CHILD); 278 accmode |= VWRITE; 279 error = VOP_ACCESSX(vp, accmode, cred, p); 280 } else if (supportedtypep != NULL) { 281 *supportedtypep &= ~NFSACCESS_DELETE; 282 } 283 } 284 } 285 286 /* 287 * Allow certain operations for the owner (reads and writes 288 * on files that are already open). 289 */ 290 if (override != NFSACCCHK_NOOVERRIDE && 291 (error == EPERM || error == EACCES)) { 292 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 293 error = 0; 294 else if (override & NFSACCCHK_ALLOWOWNER) { 295 getret = VOP_GETATTR(vp, &vattr, cred); 296 if (getret == 0 && cred->cr_uid == vattr.va_uid) 297 error = 0; 298 } 299 } 300 if (vpislocked == 0) 301 NFSVOPUNLOCK(vp, 0); 302 303 out: 304 NFSEXITCODE(error); 305 return (error); 306 } 307 308 /* 309 * Set attribute(s) vnop. 310 */ 311 int 312 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 313 struct thread *p, struct nfsexstuff *exp) 314 { 315 int error; 316 317 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 318 NFSEXITCODE(error); 319 return (error); 320 } 321 322 /* 323 * Set up nameidata for a lookup() call and do it. 324 */ 325 int 326 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 327 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 328 struct vnode **retdirp) 329 { 330 struct componentname *cnp = &ndp->ni_cnd; 331 int i; 332 struct iovec aiov; 333 struct uio auio; 334 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 335 int error = 0, crossmnt; 336 char *cp; 337 338 *retdirp = NULL; 339 cnp->cn_nameptr = cnp->cn_pnbuf; 340 ndp->ni_strictrelative = 0; 341 /* 342 * Extract and set starting directory. 343 */ 344 if (dp->v_type != VDIR) { 345 if (islocked) 346 vput(dp); 347 else 348 vrele(dp); 349 nfsvno_relpathbuf(ndp); 350 error = ENOTDIR; 351 goto out1; 352 } 353 if (islocked) 354 NFSVOPUNLOCK(dp, 0); 355 VREF(dp); 356 *retdirp = dp; 357 if (NFSVNO_EXRDONLY(exp)) 358 cnp->cn_flags |= RDONLY; 359 ndp->ni_segflg = UIO_SYSSPACE; 360 crossmnt = 1; 361 362 if (nd->nd_flag & ND_PUBLOOKUP) { 363 ndp->ni_loopcnt = 0; 364 if (cnp->cn_pnbuf[0] == '/') { 365 vrele(dp); 366 /* 367 * Check for degenerate pathnames here, since lookup() 368 * panics on them. 369 */ 370 for (i = 1; i < ndp->ni_pathlen; i++) 371 if (cnp->cn_pnbuf[i] != '/') 372 break; 373 if (i == ndp->ni_pathlen) { 374 error = NFSERR_ACCES; 375 goto out; 376 } 377 dp = rootvnode; 378 VREF(dp); 379 } 380 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 381 (nd->nd_flag & ND_NFSV4) == 0) { 382 /* 383 * Only cross mount points for NFSv4 when doing a 384 * mount while traversing the file system above 385 * the mount point, unless nfsrv_enable_crossmntpt is set. 386 */ 387 cnp->cn_flags |= NOCROSSMOUNT; 388 crossmnt = 0; 389 } 390 391 /* 392 * Initialize for scan, set ni_startdir and bump ref on dp again 393 * becuase lookup() will dereference ni_startdir. 394 */ 395 396 cnp->cn_thread = p; 397 ndp->ni_startdir = dp; 398 ndp->ni_rootdir = rootvnode; 399 ndp->ni_topdir = NULL; 400 401 if (!lockleaf) 402 cnp->cn_flags |= LOCKLEAF; 403 for (;;) { 404 cnp->cn_nameptr = cnp->cn_pnbuf; 405 /* 406 * Call lookup() to do the real work. If an error occurs, 407 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 408 * we do not have to dereference anything before returning. 409 * In either case ni_startdir will be dereferenced and NULLed 410 * out. 411 */ 412 error = lookup(ndp); 413 if (error) 414 break; 415 416 /* 417 * Check for encountering a symbolic link. Trivial 418 * termination occurs if no symlink encountered. 419 */ 420 if ((cnp->cn_flags & ISSYMLINK) == 0) { 421 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 422 nfsvno_relpathbuf(ndp); 423 if (ndp->ni_vp && !lockleaf) 424 NFSVOPUNLOCK(ndp->ni_vp, 0); 425 break; 426 } 427 428 /* 429 * Validate symlink 430 */ 431 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 432 NFSVOPUNLOCK(ndp->ni_dvp, 0); 433 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 434 error = EINVAL; 435 goto badlink2; 436 } 437 438 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 439 error = ELOOP; 440 goto badlink2; 441 } 442 if (ndp->ni_pathlen > 1) 443 cp = uma_zalloc(namei_zone, M_WAITOK); 444 else 445 cp = cnp->cn_pnbuf; 446 aiov.iov_base = cp; 447 aiov.iov_len = MAXPATHLEN; 448 auio.uio_iov = &aiov; 449 auio.uio_iovcnt = 1; 450 auio.uio_offset = 0; 451 auio.uio_rw = UIO_READ; 452 auio.uio_segflg = UIO_SYSSPACE; 453 auio.uio_td = NULL; 454 auio.uio_resid = MAXPATHLEN; 455 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 456 if (error) { 457 badlink1: 458 if (ndp->ni_pathlen > 1) 459 uma_zfree(namei_zone, cp); 460 badlink2: 461 vrele(ndp->ni_dvp); 462 vput(ndp->ni_vp); 463 break; 464 } 465 linklen = MAXPATHLEN - auio.uio_resid; 466 if (linklen == 0) { 467 error = ENOENT; 468 goto badlink1; 469 } 470 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 471 error = ENAMETOOLONG; 472 goto badlink1; 473 } 474 475 /* 476 * Adjust or replace path 477 */ 478 if (ndp->ni_pathlen > 1) { 479 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 480 uma_zfree(namei_zone, cnp->cn_pnbuf); 481 cnp->cn_pnbuf = cp; 482 } else 483 cnp->cn_pnbuf[linklen] = '\0'; 484 ndp->ni_pathlen += linklen; 485 486 /* 487 * Cleanup refs for next loop and check if root directory 488 * should replace current directory. Normally ni_dvp 489 * becomes the new base directory and is cleaned up when 490 * we loop. Explicitly null pointers after invalidation 491 * to clarify operation. 492 */ 493 vput(ndp->ni_vp); 494 ndp->ni_vp = NULL; 495 496 if (cnp->cn_pnbuf[0] == '/') { 497 vrele(ndp->ni_dvp); 498 ndp->ni_dvp = ndp->ni_rootdir; 499 VREF(ndp->ni_dvp); 500 } 501 ndp->ni_startdir = ndp->ni_dvp; 502 ndp->ni_dvp = NULL; 503 } 504 if (!lockleaf) 505 cnp->cn_flags &= ~LOCKLEAF; 506 507 out: 508 if (error) { 509 nfsvno_relpathbuf(ndp); 510 ndp->ni_vp = NULL; 511 ndp->ni_dvp = NULL; 512 ndp->ni_startdir = NULL; 513 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 514 ndp->ni_dvp = NULL; 515 } 516 517 out1: 518 NFSEXITCODE2(error, nd); 519 return (error); 520 } 521 522 /* 523 * Set up a pathname buffer and return a pointer to it and, optionally 524 * set a hash pointer. 525 */ 526 void 527 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 528 { 529 struct componentname *cnp = &ndp->ni_cnd; 530 531 cnp->cn_flags |= (NOMACCHECK | HASBUF); 532 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 533 if (hashpp != NULL) 534 *hashpp = NULL; 535 *bufpp = cnp->cn_pnbuf; 536 } 537 538 /* 539 * Release the above path buffer, if not released by nfsvno_namei(). 540 */ 541 void 542 nfsvno_relpathbuf(struct nameidata *ndp) 543 { 544 545 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 546 panic("nfsrelpath"); 547 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 548 ndp->ni_cnd.cn_flags &= ~HASBUF; 549 } 550 551 /* 552 * Readlink vnode op into an mbuf list. 553 */ 554 int 555 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 556 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 557 { 558 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 559 struct iovec *ivp = iv; 560 struct uio io, *uiop = &io; 561 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 562 int i, len, tlen, error = 0; 563 564 len = 0; 565 i = 0; 566 while (len < NFS_MAXPATHLEN) { 567 NFSMGET(mp); 568 MCLGET(mp, M_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 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1051 nfsvno_relpathbuf(ndp); 1052 NFSEXITCODE(error); 1053 return (error); 1054 } 1055 1056 /* 1057 * Remove a directory. 1058 */ 1059 int 1060 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1061 struct thread *p, struct nfsexstuff *exp) 1062 { 1063 struct vnode *vp; 1064 int error = 0; 1065 1066 vp = ndp->ni_vp; 1067 if (vp->v_type != VDIR) { 1068 error = ENOTDIR; 1069 goto out; 1070 } 1071 /* 1072 * No rmdir "." please. 1073 */ 1074 if (ndp->ni_dvp == vp) { 1075 error = EINVAL; 1076 goto out; 1077 } 1078 /* 1079 * The root of a mounted filesystem cannot be deleted. 1080 */ 1081 if (vp->v_vflag & VV_ROOT) 1082 error = EBUSY; 1083 out: 1084 if (!error) 1085 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1086 if (ndp->ni_dvp == vp) 1087 vrele(ndp->ni_dvp); 1088 else 1089 vput(ndp->ni_dvp); 1090 vput(vp); 1091 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1092 nfsvno_relpathbuf(ndp); 1093 NFSEXITCODE(error); 1094 return (error); 1095 } 1096 1097 /* 1098 * Rename vnode op. 1099 */ 1100 int 1101 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1102 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1103 { 1104 struct vnode *fvp, *tvp, *tdvp; 1105 int error = 0; 1106 1107 fvp = fromndp->ni_vp; 1108 if (ndstat) { 1109 vrele(fromndp->ni_dvp); 1110 vrele(fvp); 1111 error = ndstat; 1112 goto out1; 1113 } 1114 tdvp = tondp->ni_dvp; 1115 tvp = tondp->ni_vp; 1116 if (tvp != NULL) { 1117 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1118 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1119 goto out; 1120 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1121 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1122 goto out; 1123 } 1124 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1125 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1126 goto out; 1127 } 1128 1129 /* 1130 * A rename to '.' or '..' results in a prematurely 1131 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1132 * here. 1133 */ 1134 if ((tondp->ni_cnd.cn_namelen == 1 && 1135 tondp->ni_cnd.cn_nameptr[0] == '.') || 1136 (tondp->ni_cnd.cn_namelen == 2 && 1137 tondp->ni_cnd.cn_nameptr[0] == '.' && 1138 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1139 error = EINVAL; 1140 goto out; 1141 } 1142 } 1143 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1144 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1145 goto out; 1146 } 1147 if (fvp->v_mount != tdvp->v_mount) { 1148 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1149 goto out; 1150 } 1151 if (fvp == tdvp) { 1152 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1153 goto out; 1154 } 1155 if (fvp == tvp) { 1156 /* 1157 * If source and destination are the same, there is nothing to 1158 * do. Set error to -1 to indicate this. 1159 */ 1160 error = -1; 1161 goto out; 1162 } 1163 if (ndflag & ND_NFSV4) { 1164 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1165 error = nfsrv_checkremove(fvp, 0, p); 1166 NFSVOPUNLOCK(fvp, 0); 1167 } else 1168 error = EPERM; 1169 if (tvp && !error) 1170 error = nfsrv_checkremove(tvp, 1, p); 1171 } else { 1172 /* 1173 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1174 * that the NFSv4 client won't be confused by the rename. 1175 * Since nfsd_recalldelegation() can only be called on an 1176 * unlocked vnode at this point and fvp is the file that will 1177 * still exist after the rename, just do fvp. 1178 */ 1179 nfsd_recalldelegation(fvp, p); 1180 } 1181 out: 1182 if (!error) { 1183 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1184 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1185 &tondp->ni_cnd); 1186 } else { 1187 if (tdvp == tvp) 1188 vrele(tdvp); 1189 else 1190 vput(tdvp); 1191 if (tvp) 1192 vput(tvp); 1193 vrele(fromndp->ni_dvp); 1194 vrele(fvp); 1195 if (error == -1) 1196 error = 0; 1197 } 1198 vrele(tondp->ni_startdir); 1199 nfsvno_relpathbuf(tondp); 1200 out1: 1201 vrele(fromndp->ni_startdir); 1202 nfsvno_relpathbuf(fromndp); 1203 NFSEXITCODE(error); 1204 return (error); 1205 } 1206 1207 /* 1208 * Link vnode op. 1209 */ 1210 int 1211 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1212 struct thread *p, struct nfsexstuff *exp) 1213 { 1214 struct vnode *xp; 1215 int error = 0; 1216 1217 xp = ndp->ni_vp; 1218 if (xp != NULL) { 1219 error = EEXIST; 1220 } else { 1221 xp = ndp->ni_dvp; 1222 if (vp->v_mount != xp->v_mount) 1223 error = EXDEV; 1224 } 1225 if (!error) { 1226 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1227 if ((vp->v_iflag & VI_DOOMED) == 0) 1228 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1229 else 1230 error = EPERM; 1231 if (ndp->ni_dvp == vp) 1232 vrele(ndp->ni_dvp); 1233 else 1234 vput(ndp->ni_dvp); 1235 NFSVOPUNLOCK(vp, 0); 1236 } else { 1237 if (ndp->ni_dvp == ndp->ni_vp) 1238 vrele(ndp->ni_dvp); 1239 else 1240 vput(ndp->ni_dvp); 1241 if (ndp->ni_vp) 1242 vrele(ndp->ni_vp); 1243 } 1244 nfsvno_relpathbuf(ndp); 1245 NFSEXITCODE(error); 1246 return (error); 1247 } 1248 1249 /* 1250 * Do the fsync() appropriate for the commit. 1251 */ 1252 int 1253 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1254 struct thread *td) 1255 { 1256 int error = 0; 1257 1258 /* 1259 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1260 * file is done. At this time VOP_FSYNC does not accept offset and 1261 * byte count parameters so call VOP_FSYNC the whole file for now. 1262 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1263 */ 1264 if (cnt == 0 || cnt > MAX_COMMIT_COUNT) { 1265 /* 1266 * Give up and do the whole thing 1267 */ 1268 if (vp->v_object && 1269 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1270 VM_OBJECT_LOCK(vp->v_object); 1271 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1272 VM_OBJECT_UNLOCK(vp->v_object); 1273 } 1274 error = VOP_FSYNC(vp, MNT_WAIT, td); 1275 } else { 1276 /* 1277 * Locate and synchronously write any buffers that fall 1278 * into the requested range. Note: we are assuming that 1279 * f_iosize is a power of 2. 1280 */ 1281 int iosize = vp->v_mount->mnt_stat.f_iosize; 1282 int iomask = iosize - 1; 1283 struct bufobj *bo; 1284 daddr_t lblkno; 1285 1286 /* 1287 * Align to iosize boundry, super-align to page boundry. 1288 */ 1289 if (off & iomask) { 1290 cnt += off & iomask; 1291 off &= ~(u_quad_t)iomask; 1292 } 1293 if (off & PAGE_MASK) { 1294 cnt += off & PAGE_MASK; 1295 off &= ~(u_quad_t)PAGE_MASK; 1296 } 1297 lblkno = off / iosize; 1298 1299 if (vp->v_object && 1300 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1301 VM_OBJECT_LOCK(vp->v_object); 1302 vm_object_page_clean(vp->v_object, off, off + cnt, 1303 OBJPC_SYNC); 1304 VM_OBJECT_UNLOCK(vp->v_object); 1305 } 1306 1307 bo = &vp->v_bufobj; 1308 BO_LOCK(bo); 1309 while (cnt > 0) { 1310 struct buf *bp; 1311 1312 /* 1313 * If we have a buffer and it is marked B_DELWRI we 1314 * have to lock and write it. Otherwise the prior 1315 * write is assumed to have already been committed. 1316 * 1317 * gbincore() can return invalid buffers now so we 1318 * have to check that bit as well (though B_DELWRI 1319 * should not be set if B_INVAL is set there could be 1320 * a race here since we haven't locked the buffer). 1321 */ 1322 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1323 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1324 LK_INTERLOCK, BO_MTX(bo)) == ENOLCK) { 1325 BO_LOCK(bo); 1326 continue; /* retry */ 1327 } 1328 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1329 B_DELWRI) { 1330 bremfree(bp); 1331 bp->b_flags &= ~B_ASYNC; 1332 bwrite(bp); 1333 ++nfs_commit_miss; 1334 } else 1335 BUF_UNLOCK(bp); 1336 BO_LOCK(bo); 1337 } 1338 ++nfs_commit_blks; 1339 if (cnt < iosize) 1340 break; 1341 cnt -= iosize; 1342 ++lblkno; 1343 } 1344 BO_UNLOCK(bo); 1345 } 1346 NFSEXITCODE(error); 1347 return (error); 1348 } 1349 1350 /* 1351 * Statfs vnode op. 1352 */ 1353 int 1354 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1355 { 1356 int error; 1357 1358 error = VFS_STATFS(vp->v_mount, sf); 1359 if (error == 0) { 1360 /* 1361 * Since NFS handles these values as unsigned on the 1362 * wire, there is no way to represent negative values, 1363 * so set them to 0. Without this, they will appear 1364 * to be very large positive values for clients like 1365 * Solaris10. 1366 */ 1367 if (sf->f_bavail < 0) 1368 sf->f_bavail = 0; 1369 if (sf->f_ffree < 0) 1370 sf->f_ffree = 0; 1371 } 1372 NFSEXITCODE(error); 1373 return (error); 1374 } 1375 1376 /* 1377 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1378 * must handle nfsrv_opencheck() calls after any other access checks. 1379 */ 1380 void 1381 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1382 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1383 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1384 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1385 struct nfsexstuff *exp, struct vnode **vpp) 1386 { 1387 struct vnode *vp = NULL; 1388 u_quad_t tempsize; 1389 struct nfsexstuff nes; 1390 1391 if (ndp->ni_vp == NULL) 1392 nd->nd_repstat = nfsrv_opencheck(clientid, 1393 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1394 if (!nd->nd_repstat) { 1395 if (ndp->ni_vp == NULL) { 1396 vrele(ndp->ni_startdir); 1397 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1398 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1399 vput(ndp->ni_dvp); 1400 nfsvno_relpathbuf(ndp); 1401 if (!nd->nd_repstat) { 1402 if (*exclusive_flagp) { 1403 *exclusive_flagp = 0; 1404 NFSVNO_ATTRINIT(nvap); 1405 nvap->na_atime.tv_sec = cverf[0]; 1406 nvap->na_atime.tv_nsec = cverf[1]; 1407 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1408 &nvap->na_vattr, cred); 1409 } else { 1410 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1411 aclp, p, attrbitp, exp); 1412 } 1413 } 1414 vp = ndp->ni_vp; 1415 } else { 1416 if (ndp->ni_startdir) 1417 vrele(ndp->ni_startdir); 1418 nfsvno_relpathbuf(ndp); 1419 vp = ndp->ni_vp; 1420 if (create == NFSV4OPEN_CREATE) { 1421 if (ndp->ni_dvp == vp) 1422 vrele(ndp->ni_dvp); 1423 else 1424 vput(ndp->ni_dvp); 1425 } 1426 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1427 if (ndp->ni_cnd.cn_flags & RDONLY) 1428 NFSVNO_SETEXRDONLY(&nes); 1429 else 1430 NFSVNO_EXINIT(&nes); 1431 nd->nd_repstat = nfsvno_accchk(vp, 1432 VWRITE, cred, &nes, p, 1433 NFSACCCHK_NOOVERRIDE, 1434 NFSACCCHK_VPISLOCKED, NULL); 1435 nd->nd_repstat = nfsrv_opencheck(clientid, 1436 stateidp, stp, vp, nd, p, nd->nd_repstat); 1437 if (!nd->nd_repstat) { 1438 tempsize = nvap->na_size; 1439 NFSVNO_ATTRINIT(nvap); 1440 nvap->na_size = tempsize; 1441 nd->nd_repstat = VOP_SETATTR(vp, 1442 &nvap->na_vattr, cred); 1443 } 1444 } else if (vp->v_type == VREG) { 1445 nd->nd_repstat = nfsrv_opencheck(clientid, 1446 stateidp, stp, vp, nd, p, nd->nd_repstat); 1447 } 1448 } 1449 } else { 1450 if (ndp->ni_cnd.cn_flags & HASBUF) 1451 nfsvno_relpathbuf(ndp); 1452 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1453 vrele(ndp->ni_startdir); 1454 if (ndp->ni_dvp == ndp->ni_vp) 1455 vrele(ndp->ni_dvp); 1456 else 1457 vput(ndp->ni_dvp); 1458 if (ndp->ni_vp) 1459 vput(ndp->ni_vp); 1460 } 1461 } 1462 *vpp = vp; 1463 1464 NFSEXITCODE2(0, nd); 1465 } 1466 1467 /* 1468 * Updates the file rev and sets the mtime and ctime 1469 * to the current clock time, returning the va_filerev and va_Xtime 1470 * values. 1471 */ 1472 void 1473 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1474 struct ucred *cred, struct thread *p) 1475 { 1476 struct vattr va; 1477 1478 VATTR_NULL(&va); 1479 getnanotime(&va.va_mtime); 1480 (void) VOP_SETATTR(vp, &va, cred); 1481 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1482 } 1483 1484 /* 1485 * Glue routine to nfsv4_fillattr(). 1486 */ 1487 int 1488 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1489 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1490 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1491 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1492 { 1493 int error; 1494 1495 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1496 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1497 mounted_on_fileno); 1498 NFSEXITCODE2(0, nd); 1499 return (error); 1500 } 1501 1502 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1503 /* 1504 * nfs readdir service 1505 * - mallocs what it thinks is enough to read 1506 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1507 * - calls VOP_READDIR() 1508 * - loops around building the reply 1509 * if the output generated exceeds count break out of loop 1510 * The NFSM_CLGET macro is used here so that the reply will be packed 1511 * tightly in mbuf clusters. 1512 * - it trims out records with d_fileno == 0 1513 * this doesn't matter for Unix clients, but they might confuse clients 1514 * for other os'. 1515 * - it trims out records with d_type == DT_WHT 1516 * these cannot be seen through NFS (unless we extend the protocol) 1517 * The alternate call nfsrvd_readdirplus() does lookups as well. 1518 * PS: The NFS protocol spec. does not clarify what the "count" byte 1519 * argument is a count of.. just name strings and file id's or the 1520 * entire reply rpc or ... 1521 * I tried just file name and id sizes and it confused the Sun client, 1522 * so I am using the full rpc size now. The "paranoia.." comment refers 1523 * to including the status longwords that are not a part of the dir. 1524 * "entry" structures, but are in the rpc. 1525 */ 1526 int 1527 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1528 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1529 { 1530 struct dirent *dp; 1531 u_int32_t *tl; 1532 int dirlen; 1533 char *cpos, *cend, *rbuf; 1534 struct nfsvattr at; 1535 int nlen, error = 0, getret = 1; 1536 int siz, cnt, fullsiz, eofflag, ncookies; 1537 u_int64_t off, toff, verf; 1538 u_long *cookies = NULL, *cookiep; 1539 struct uio io; 1540 struct iovec iv; 1541 int not_zfs; 1542 1543 if (nd->nd_repstat) { 1544 nfsrv_postopattr(nd, getret, &at); 1545 goto out; 1546 } 1547 if (nd->nd_flag & ND_NFSV2) { 1548 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1549 off = fxdr_unsigned(u_quad_t, *tl++); 1550 } else { 1551 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1552 off = fxdr_hyper(tl); 1553 tl += 2; 1554 verf = fxdr_hyper(tl); 1555 tl += 2; 1556 } 1557 toff = off; 1558 cnt = fxdr_unsigned(int, *tl); 1559 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1560 cnt = NFS_SRVMAXDATA(nd); 1561 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1562 fullsiz = siz; 1563 if (nd->nd_flag & ND_NFSV3) { 1564 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1565 p, 1); 1566 #if 0 1567 /* 1568 * va_filerev is not sufficient as a cookie verifier, 1569 * since it is not supposed to change when entries are 1570 * removed/added unless that offset cookies returned to 1571 * the client are no longer valid. 1572 */ 1573 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1574 nd->nd_repstat = NFSERR_BAD_COOKIE; 1575 #endif 1576 } 1577 if (nd->nd_repstat == 0 && cnt == 0) { 1578 if (nd->nd_flag & ND_NFSV2) 1579 /* NFSv2 does not have NFSERR_TOOSMALL */ 1580 nd->nd_repstat = EPERM; 1581 else 1582 nd->nd_repstat = NFSERR_TOOSMALL; 1583 } 1584 if (!nd->nd_repstat) 1585 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1586 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1587 NFSACCCHK_VPISLOCKED, NULL); 1588 if (nd->nd_repstat) { 1589 vput(vp); 1590 if (nd->nd_flag & ND_NFSV3) 1591 nfsrv_postopattr(nd, getret, &at); 1592 goto out; 1593 } 1594 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1595 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1596 again: 1597 eofflag = 0; 1598 if (cookies) { 1599 free((caddr_t)cookies, M_TEMP); 1600 cookies = NULL; 1601 } 1602 1603 iv.iov_base = rbuf; 1604 iv.iov_len = siz; 1605 io.uio_iov = &iv; 1606 io.uio_iovcnt = 1; 1607 io.uio_offset = (off_t)off; 1608 io.uio_resid = siz; 1609 io.uio_segflg = UIO_SYSSPACE; 1610 io.uio_rw = UIO_READ; 1611 io.uio_td = NULL; 1612 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1613 &cookies); 1614 off = (u_int64_t)io.uio_offset; 1615 if (io.uio_resid) 1616 siz -= io.uio_resid; 1617 1618 if (!cookies && !nd->nd_repstat) 1619 nd->nd_repstat = NFSERR_PERM; 1620 if (nd->nd_flag & ND_NFSV3) { 1621 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1622 if (!nd->nd_repstat) 1623 nd->nd_repstat = getret; 1624 } 1625 1626 /* 1627 * Handles the failed cases. nd->nd_repstat == 0 past here. 1628 */ 1629 if (nd->nd_repstat) { 1630 vput(vp); 1631 free((caddr_t)rbuf, M_TEMP); 1632 if (cookies) 1633 free((caddr_t)cookies, M_TEMP); 1634 if (nd->nd_flag & ND_NFSV3) 1635 nfsrv_postopattr(nd, getret, &at); 1636 goto out; 1637 } 1638 /* 1639 * If nothing read, return eof 1640 * rpc reply 1641 */ 1642 if (siz == 0) { 1643 vput(vp); 1644 if (nd->nd_flag & ND_NFSV2) { 1645 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1646 } else { 1647 nfsrv_postopattr(nd, getret, &at); 1648 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1649 txdr_hyper(at.na_filerev, tl); 1650 tl += 2; 1651 } 1652 *tl++ = newnfs_false; 1653 *tl = newnfs_true; 1654 FREE((caddr_t)rbuf, M_TEMP); 1655 FREE((caddr_t)cookies, M_TEMP); 1656 goto out; 1657 } 1658 1659 /* 1660 * Check for degenerate cases of nothing useful read. 1661 * If so go try again 1662 */ 1663 cpos = rbuf; 1664 cend = rbuf + siz; 1665 dp = (struct dirent *)cpos; 1666 cookiep = cookies; 1667 1668 /* 1669 * For some reason FreeBSD's ufs_readdir() chooses to back the 1670 * directory offset up to a block boundary, so it is necessary to 1671 * skip over the records that precede the requested offset. This 1672 * requires the assumption that file offset cookies monotonically 1673 * increase. 1674 * Since the offset cookies don't monotonically increase for ZFS, 1675 * this is not done when ZFS is the file system. 1676 */ 1677 while (cpos < cend && ncookies > 0 && 1678 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1679 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) { 1680 cpos += dp->d_reclen; 1681 dp = (struct dirent *)cpos; 1682 cookiep++; 1683 ncookies--; 1684 } 1685 if (cpos >= cend || ncookies == 0) { 1686 siz = fullsiz; 1687 toff = off; 1688 goto again; 1689 } 1690 vput(vp); 1691 1692 /* 1693 * dirlen is the size of the reply, including all XDR and must 1694 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1695 * if the XDR should be included in "count", but to be safe, we do. 1696 * (Include the two booleans at the end of the reply in dirlen now.) 1697 */ 1698 if (nd->nd_flag & ND_NFSV3) { 1699 nfsrv_postopattr(nd, getret, &at); 1700 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1701 txdr_hyper(at.na_filerev, tl); 1702 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1703 } else { 1704 dirlen = 2 * NFSX_UNSIGNED; 1705 } 1706 1707 /* Loop through the records and build reply */ 1708 while (cpos < cend && ncookies > 0) { 1709 nlen = dp->d_namlen; 1710 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1711 nlen <= NFS_MAXNAMLEN) { 1712 if (nd->nd_flag & ND_NFSV3) 1713 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1714 else 1715 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1716 if (dirlen > cnt) { 1717 eofflag = 0; 1718 break; 1719 } 1720 1721 /* 1722 * Build the directory record xdr from 1723 * the dirent entry. 1724 */ 1725 if (nd->nd_flag & ND_NFSV3) { 1726 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1727 *tl++ = newnfs_true; 1728 *tl++ = 0; 1729 } else { 1730 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1731 *tl++ = newnfs_true; 1732 } 1733 *tl = txdr_unsigned(dp->d_fileno); 1734 (void) nfsm_strtom(nd, dp->d_name, nlen); 1735 if (nd->nd_flag & ND_NFSV3) { 1736 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1737 *tl++ = 0; 1738 } else 1739 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1740 *tl = txdr_unsigned(*cookiep); 1741 } 1742 cpos += dp->d_reclen; 1743 dp = (struct dirent *)cpos; 1744 cookiep++; 1745 ncookies--; 1746 } 1747 if (cpos < cend) 1748 eofflag = 0; 1749 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1750 *tl++ = newnfs_false; 1751 if (eofflag) 1752 *tl = newnfs_true; 1753 else 1754 *tl = newnfs_false; 1755 FREE((caddr_t)rbuf, M_TEMP); 1756 FREE((caddr_t)cookies, M_TEMP); 1757 1758 out: 1759 NFSEXITCODE2(0, nd); 1760 return (0); 1761 nfsmout: 1762 vput(vp); 1763 NFSEXITCODE2(error, nd); 1764 return (error); 1765 } 1766 1767 /* 1768 * Readdirplus for V3 and Readdir for V4. 1769 */ 1770 int 1771 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1772 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1773 { 1774 struct dirent *dp; 1775 u_int32_t *tl; 1776 int dirlen; 1777 char *cpos, *cend, *rbuf; 1778 struct vnode *nvp; 1779 fhandle_t nfh; 1780 struct nfsvattr nva, at, *nvap = &nva; 1781 struct mbuf *mb0, *mb1; 1782 struct nfsreferral *refp; 1783 int nlen, r, error = 0, getret = 1, usevget = 1; 1784 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1785 caddr_t bpos0, bpos1; 1786 u_int64_t off, toff, verf; 1787 u_long *cookies = NULL, *cookiep; 1788 nfsattrbit_t attrbits, rderrbits, savbits; 1789 struct uio io; 1790 struct iovec iv; 1791 struct componentname cn; 1792 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls; 1793 struct mount *mp, *new_mp; 1794 uint64_t mounted_on_fileno; 1795 1796 if (nd->nd_repstat) { 1797 nfsrv_postopattr(nd, getret, &at); 1798 goto out; 1799 } 1800 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1801 off = fxdr_hyper(tl); 1802 toff = off; 1803 tl += 2; 1804 verf = fxdr_hyper(tl); 1805 tl += 2; 1806 siz = fxdr_unsigned(int, *tl++); 1807 cnt = fxdr_unsigned(int, *tl); 1808 1809 /* 1810 * Use the server's maximum data transfer size as the upper bound 1811 * on reply datalen. 1812 */ 1813 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1814 cnt = NFS_SRVMAXDATA(nd); 1815 1816 /* 1817 * siz is a "hint" of how much directory information (name, fileid, 1818 * cookie) should be in the reply. At least one client "hints" 0, 1819 * so I set it to cnt for that case. I also round it up to the 1820 * next multiple of DIRBLKSIZ. 1821 */ 1822 if (siz <= 0) 1823 siz = cnt; 1824 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1825 1826 if (nd->nd_flag & ND_NFSV4) { 1827 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1828 if (error) 1829 goto nfsmout; 1830 NFSSET_ATTRBIT(&savbits, &attrbits); 1831 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1832 NFSZERO_ATTRBIT(&rderrbits); 1833 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1834 } else { 1835 NFSZERO_ATTRBIT(&attrbits); 1836 } 1837 fullsiz = siz; 1838 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1839 if (!nd->nd_repstat) { 1840 if (off && verf != at.na_filerev) { 1841 /* 1842 * va_filerev is not sufficient as a cookie verifier, 1843 * since it is not supposed to change when entries are 1844 * removed/added unless that offset cookies returned to 1845 * the client are no longer valid. 1846 */ 1847 #if 0 1848 if (nd->nd_flag & ND_NFSV4) { 1849 nd->nd_repstat = NFSERR_NOTSAME; 1850 } else { 1851 nd->nd_repstat = NFSERR_BAD_COOKIE; 1852 } 1853 #endif 1854 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1855 nd->nd_repstat = NFSERR_BAD_COOKIE; 1856 } 1857 } 1858 if (!nd->nd_repstat && vp->v_type != VDIR) 1859 nd->nd_repstat = NFSERR_NOTDIR; 1860 if (!nd->nd_repstat && cnt == 0) 1861 nd->nd_repstat = NFSERR_TOOSMALL; 1862 if (!nd->nd_repstat) 1863 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1864 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1865 NFSACCCHK_VPISLOCKED, NULL); 1866 if (nd->nd_repstat) { 1867 vput(vp); 1868 if (nd->nd_flag & ND_NFSV3) 1869 nfsrv_postopattr(nd, getret, &at); 1870 goto out; 1871 } 1872 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1873 1874 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1875 again: 1876 eofflag = 0; 1877 if (cookies) { 1878 free((caddr_t)cookies, M_TEMP); 1879 cookies = NULL; 1880 } 1881 1882 iv.iov_base = rbuf; 1883 iv.iov_len = siz; 1884 io.uio_iov = &iv; 1885 io.uio_iovcnt = 1; 1886 io.uio_offset = (off_t)off; 1887 io.uio_resid = siz; 1888 io.uio_segflg = UIO_SYSSPACE; 1889 io.uio_rw = UIO_READ; 1890 io.uio_td = NULL; 1891 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1892 &cookies); 1893 off = (u_int64_t)io.uio_offset; 1894 if (io.uio_resid) 1895 siz -= io.uio_resid; 1896 1897 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1898 1899 if (!cookies && !nd->nd_repstat) 1900 nd->nd_repstat = NFSERR_PERM; 1901 if (!nd->nd_repstat) 1902 nd->nd_repstat = getret; 1903 if (nd->nd_repstat) { 1904 vput(vp); 1905 if (cookies) 1906 free((caddr_t)cookies, M_TEMP); 1907 free((caddr_t)rbuf, M_TEMP); 1908 if (nd->nd_flag & ND_NFSV3) 1909 nfsrv_postopattr(nd, getret, &at); 1910 goto out; 1911 } 1912 /* 1913 * If nothing read, return eof 1914 * rpc reply 1915 */ 1916 if (siz == 0) { 1917 vput(vp); 1918 if (nd->nd_flag & ND_NFSV3) 1919 nfsrv_postopattr(nd, getret, &at); 1920 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1921 txdr_hyper(at.na_filerev, tl); 1922 tl += 2; 1923 *tl++ = newnfs_false; 1924 *tl = newnfs_true; 1925 free((caddr_t)cookies, M_TEMP); 1926 free((caddr_t)rbuf, M_TEMP); 1927 goto out; 1928 } 1929 1930 /* 1931 * Check for degenerate cases of nothing useful read. 1932 * If so go try again 1933 */ 1934 cpos = rbuf; 1935 cend = rbuf + siz; 1936 dp = (struct dirent *)cpos; 1937 cookiep = cookies; 1938 1939 /* 1940 * For some reason FreeBSD's ufs_readdir() chooses to back the 1941 * directory offset up to a block boundary, so it is necessary to 1942 * skip over the records that precede the requested offset. This 1943 * requires the assumption that file offset cookies monotonically 1944 * increase. 1945 * Since the offset cookies don't monotonically increase for ZFS, 1946 * this is not done when ZFS is the file system. 1947 */ 1948 while (cpos < cend && ncookies > 0 && 1949 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1950 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) || 1951 ((nd->nd_flag & ND_NFSV4) && 1952 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1953 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1954 cpos += dp->d_reclen; 1955 dp = (struct dirent *)cpos; 1956 cookiep++; 1957 ncookies--; 1958 } 1959 if (cpos >= cend || ncookies == 0) { 1960 siz = fullsiz; 1961 toff = off; 1962 goto again; 1963 } 1964 1965 /* 1966 * Busy the file system so that the mount point won't go away 1967 * and, as such, VFS_VGET() can be used safely. 1968 */ 1969 mp = vp->v_mount; 1970 vfs_ref(mp); 1971 NFSVOPUNLOCK(vp, 0); 1972 nd->nd_repstat = vfs_busy(mp, 0); 1973 vfs_rel(mp); 1974 if (nd->nd_repstat != 0) { 1975 vrele(vp); 1976 free(cookies, M_TEMP); 1977 free(rbuf, M_TEMP); 1978 if (nd->nd_flag & ND_NFSV3) 1979 nfsrv_postopattr(nd, getret, &at); 1980 goto out; 1981 } 1982 1983 /* 1984 * Save this position, in case there is an error before one entry 1985 * is created. 1986 */ 1987 mb0 = nd->nd_mb; 1988 bpos0 = nd->nd_bpos; 1989 1990 /* 1991 * Fill in the first part of the reply. 1992 * dirlen is the reply length in bytes and cannot exceed cnt. 1993 * (Include the two booleans at the end of the reply in dirlen now, 1994 * so we recognize when we have exceeded cnt.) 1995 */ 1996 if (nd->nd_flag & ND_NFSV3) { 1997 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1998 nfsrv_postopattr(nd, getret, &at); 1999 } else { 2000 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2001 } 2002 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2003 txdr_hyper(at.na_filerev, tl); 2004 2005 /* 2006 * Save this position, in case there is an empty reply needed. 2007 */ 2008 mb1 = nd->nd_mb; 2009 bpos1 = nd->nd_bpos; 2010 2011 /* Loop through the records and build reply */ 2012 entrycnt = 0; 2013 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2014 nlen = dp->d_namlen; 2015 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2016 nlen <= NFS_MAXNAMLEN && 2017 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2018 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2019 || (nlen == 1 && dp->d_name[0] != '.'))) { 2020 /* 2021 * Save the current position in the reply, in case 2022 * this entry exceeds cnt. 2023 */ 2024 mb1 = nd->nd_mb; 2025 bpos1 = nd->nd_bpos; 2026 2027 /* 2028 * For readdir_and_lookup get the vnode using 2029 * the file number. 2030 */ 2031 nvp = NULL; 2032 refp = NULL; 2033 r = 0; 2034 at_root = 0; 2035 needs_unbusy = 0; 2036 new_mp = mp; 2037 mounted_on_fileno = (uint64_t)dp->d_fileno; 2038 if ((nd->nd_flag & ND_NFSV3) || 2039 NFSNONZERO_ATTRBIT(&savbits)) { 2040 if (nd->nd_flag & ND_NFSV4) 2041 refp = nfsv4root_getreferral(NULL, 2042 vp, dp->d_fileno); 2043 if (refp == NULL) { 2044 if (usevget) 2045 r = VFS_VGET(mp, dp->d_fileno, 2046 LK_SHARED, &nvp); 2047 else 2048 r = EOPNOTSUPP; 2049 if (r == EOPNOTSUPP) { 2050 if (usevget) { 2051 usevget = 0; 2052 cn.cn_nameiop = LOOKUP; 2053 cn.cn_lkflags = 2054 LK_SHARED | 2055 LK_RETRY; 2056 cn.cn_cred = 2057 nd->nd_cred; 2058 cn.cn_thread = p; 2059 } 2060 cn.cn_nameptr = dp->d_name; 2061 cn.cn_namelen = nlen; 2062 cn.cn_flags = ISLASTCN | 2063 NOFOLLOW | LOCKLEAF | 2064 MPSAFE; 2065 if (nlen == 2 && 2066 dp->d_name[0] == '.' && 2067 dp->d_name[1] == '.') 2068 cn.cn_flags |= 2069 ISDOTDOT; 2070 if (NFSVOPLOCK(vp, LK_SHARED) 2071 != 0) { 2072 nd->nd_repstat = EPERM; 2073 break; 2074 } 2075 if ((vp->v_vflag & VV_ROOT) != 0 2076 && (cn.cn_flags & ISDOTDOT) 2077 != 0) { 2078 vref(vp); 2079 nvp = vp; 2080 r = 0; 2081 } else { 2082 r = VOP_LOOKUP(vp, &nvp, 2083 &cn); 2084 if (vp != nvp) 2085 NFSVOPUNLOCK(vp, 2086 0); 2087 } 2088 } 2089 2090 /* 2091 * For NFSv4, check to see if nvp is 2092 * a mount point and get the mount 2093 * point vnode, as required. 2094 */ 2095 if (r == 0 && 2096 nfsrv_enable_crossmntpt != 0 && 2097 (nd->nd_flag & ND_NFSV4) != 0 && 2098 nvp->v_type == VDIR && 2099 nvp->v_mountedhere != NULL) { 2100 new_mp = nvp->v_mountedhere; 2101 r = vfs_busy(new_mp, 0); 2102 vput(nvp); 2103 nvp = NULL; 2104 if (r == 0) { 2105 r = VFS_ROOT(new_mp, 2106 LK_SHARED, &nvp); 2107 needs_unbusy = 1; 2108 if (r == 0) 2109 at_root = 1; 2110 } 2111 } 2112 } 2113 if (!r) { 2114 if (refp == NULL && 2115 ((nd->nd_flag & ND_NFSV3) || 2116 NFSNONZERO_ATTRBIT(&attrbits))) { 2117 r = nfsvno_getfh(nvp, &nfh, p); 2118 if (!r) 2119 r = nfsvno_getattr(nvp, nvap, 2120 nd->nd_cred, p, 1); 2121 } 2122 } else { 2123 nvp = NULL; 2124 } 2125 if (r) { 2126 if (!NFSISSET_ATTRBIT(&attrbits, 2127 NFSATTRBIT_RDATTRERROR)) { 2128 if (nvp != NULL) 2129 vput(nvp); 2130 if (needs_unbusy != 0) 2131 vfs_unbusy(new_mp); 2132 nd->nd_repstat = r; 2133 break; 2134 } 2135 } 2136 } 2137 2138 /* 2139 * Build the directory record xdr 2140 */ 2141 if (nd->nd_flag & ND_NFSV3) { 2142 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2143 *tl++ = newnfs_true; 2144 *tl++ = 0; 2145 *tl = txdr_unsigned(dp->d_fileno); 2146 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2147 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2148 *tl++ = 0; 2149 *tl = txdr_unsigned(*cookiep); 2150 nfsrv_postopattr(nd, 0, nvap); 2151 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2152 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2153 if (nvp != NULL) 2154 vput(nvp); 2155 } else { 2156 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2157 *tl++ = newnfs_true; 2158 *tl++ = 0; 2159 *tl = txdr_unsigned(*cookiep); 2160 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2161 if (nvp != NULL) { 2162 supports_nfsv4acls = 2163 nfs_supportsnfsv4acls(nvp); 2164 NFSVOPUNLOCK(nvp, 0); 2165 } else 2166 supports_nfsv4acls = 0; 2167 if (refp != NULL) { 2168 dirlen += nfsrv_putreferralattr(nd, 2169 &savbits, refp, 0, 2170 &nd->nd_repstat); 2171 if (nd->nd_repstat) { 2172 if (nvp != NULL) 2173 vrele(nvp); 2174 if (needs_unbusy != 0) 2175 vfs_unbusy(new_mp); 2176 break; 2177 } 2178 } else if (r) { 2179 dirlen += nfsvno_fillattr(nd, new_mp, 2180 nvp, nvap, &nfh, r, &rderrbits, 2181 nd->nd_cred, p, isdgram, 0, 2182 supports_nfsv4acls, at_root, 2183 mounted_on_fileno); 2184 } else { 2185 dirlen += nfsvno_fillattr(nd, new_mp, 2186 nvp, nvap, &nfh, r, &attrbits, 2187 nd->nd_cred, p, isdgram, 0, 2188 supports_nfsv4acls, at_root, 2189 mounted_on_fileno); 2190 } 2191 if (nvp != NULL) 2192 vrele(nvp); 2193 dirlen += (3 * NFSX_UNSIGNED); 2194 } 2195 if (needs_unbusy != 0) 2196 vfs_unbusy(new_mp); 2197 if (dirlen <= cnt) 2198 entrycnt++; 2199 } 2200 cpos += dp->d_reclen; 2201 dp = (struct dirent *)cpos; 2202 cookiep++; 2203 ncookies--; 2204 } 2205 vrele(vp); 2206 vfs_unbusy(mp); 2207 2208 /* 2209 * If dirlen > cnt, we must strip off the last entry. If that 2210 * results in an empty reply, report NFSERR_TOOSMALL. 2211 */ 2212 if (dirlen > cnt || nd->nd_repstat) { 2213 if (!nd->nd_repstat && entrycnt == 0) 2214 nd->nd_repstat = NFSERR_TOOSMALL; 2215 if (nd->nd_repstat) 2216 newnfs_trimtrailing(nd, mb0, bpos0); 2217 else 2218 newnfs_trimtrailing(nd, mb1, bpos1); 2219 eofflag = 0; 2220 } else if (cpos < cend) 2221 eofflag = 0; 2222 if (!nd->nd_repstat) { 2223 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2224 *tl++ = newnfs_false; 2225 if (eofflag) 2226 *tl = newnfs_true; 2227 else 2228 *tl = newnfs_false; 2229 } 2230 FREE((caddr_t)cookies, M_TEMP); 2231 FREE((caddr_t)rbuf, M_TEMP); 2232 2233 out: 2234 NFSEXITCODE2(0, nd); 2235 return (0); 2236 nfsmout: 2237 vput(vp); 2238 NFSEXITCODE2(error, nd); 2239 return (error); 2240 } 2241 2242 /* 2243 * Get the settable attributes out of the mbuf list. 2244 * (Return 0 or EBADRPC) 2245 */ 2246 int 2247 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2248 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2249 { 2250 u_int32_t *tl; 2251 struct nfsv2_sattr *sp; 2252 struct timeval curtime; 2253 int error = 0, toclient = 0; 2254 2255 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2256 case ND_NFSV2: 2257 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2258 /* 2259 * Some old clients didn't fill in the high order 16bits. 2260 * --> check the low order 2 bytes for 0xffff 2261 */ 2262 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2263 nvap->na_mode = nfstov_mode(sp->sa_mode); 2264 if (sp->sa_uid != newnfs_xdrneg1) 2265 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2266 if (sp->sa_gid != newnfs_xdrneg1) 2267 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2268 if (sp->sa_size != newnfs_xdrneg1) 2269 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2270 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2271 #ifdef notyet 2272 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2273 #else 2274 nvap->na_atime.tv_sec = 2275 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2276 nvap->na_atime.tv_nsec = 0; 2277 #endif 2278 } 2279 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2280 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2281 break; 2282 case ND_NFSV3: 2283 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2284 if (*tl == newnfs_true) { 2285 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2286 nvap->na_mode = nfstov_mode(*tl); 2287 } 2288 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2289 if (*tl == newnfs_true) { 2290 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2291 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2292 } 2293 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2294 if (*tl == newnfs_true) { 2295 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2296 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2297 } 2298 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2299 if (*tl == newnfs_true) { 2300 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2301 nvap->na_size = fxdr_hyper(tl); 2302 } 2303 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2304 switch (fxdr_unsigned(int, *tl)) { 2305 case NFSV3SATTRTIME_TOCLIENT: 2306 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2307 fxdr_nfsv3time(tl, &nvap->na_atime); 2308 toclient = 1; 2309 break; 2310 case NFSV3SATTRTIME_TOSERVER: 2311 NFSGETTIME(&curtime); 2312 nvap->na_atime.tv_sec = curtime.tv_sec; 2313 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000; 2314 nvap->na_vaflags |= VA_UTIMES_NULL; 2315 break; 2316 }; 2317 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2318 switch (fxdr_unsigned(int, *tl)) { 2319 case NFSV3SATTRTIME_TOCLIENT: 2320 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2321 fxdr_nfsv3time(tl, &nvap->na_mtime); 2322 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2323 break; 2324 case NFSV3SATTRTIME_TOSERVER: 2325 NFSGETTIME(&curtime); 2326 nvap->na_mtime.tv_sec = curtime.tv_sec; 2327 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000; 2328 if (!toclient) 2329 nvap->na_vaflags |= VA_UTIMES_NULL; 2330 break; 2331 }; 2332 break; 2333 case ND_NFSV4: 2334 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2335 }; 2336 nfsmout: 2337 NFSEXITCODE2(error, nd); 2338 return (error); 2339 } 2340 2341 /* 2342 * Handle the setable attributes for V4. 2343 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2344 */ 2345 int 2346 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2347 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2348 { 2349 u_int32_t *tl; 2350 int attrsum = 0; 2351 int i, j; 2352 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2353 int toclient = 0; 2354 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2355 uid_t uid; 2356 gid_t gid; 2357 struct timeval curtime; 2358 2359 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2360 if (error) 2361 goto nfsmout; 2362 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2363 attrsize = fxdr_unsigned(int, *tl); 2364 2365 /* 2366 * Loop around getting the setable attributes. If an unsupported 2367 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2368 */ 2369 if (retnotsup) { 2370 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2371 bitpos = NFSATTRBIT_MAX; 2372 } else { 2373 bitpos = 0; 2374 } 2375 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2376 if (attrsum > attrsize) { 2377 error = NFSERR_BADXDR; 2378 goto nfsmout; 2379 } 2380 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2381 switch (bitpos) { 2382 case NFSATTRBIT_SIZE: 2383 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2384 nvap->na_size = fxdr_hyper(tl); 2385 attrsum += NFSX_HYPER; 2386 break; 2387 case NFSATTRBIT_ACL: 2388 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2389 p); 2390 if (error) 2391 goto nfsmout; 2392 if (aceerr && !nd->nd_repstat) 2393 nd->nd_repstat = aceerr; 2394 attrsum += aclsize; 2395 break; 2396 case NFSATTRBIT_ARCHIVE: 2397 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2398 if (!nd->nd_repstat) 2399 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2400 attrsum += NFSX_UNSIGNED; 2401 break; 2402 case NFSATTRBIT_HIDDEN: 2403 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2404 if (!nd->nd_repstat) 2405 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2406 attrsum += NFSX_UNSIGNED; 2407 break; 2408 case NFSATTRBIT_MIMETYPE: 2409 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2410 i = fxdr_unsigned(int, *tl); 2411 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2412 if (error) 2413 goto nfsmout; 2414 if (!nd->nd_repstat) 2415 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2416 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2417 break; 2418 case NFSATTRBIT_MODE: 2419 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2420 nvap->na_mode = nfstov_mode(*tl); 2421 attrsum += NFSX_UNSIGNED; 2422 break; 2423 case NFSATTRBIT_OWNER: 2424 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2425 j = fxdr_unsigned(int, *tl); 2426 if (j < 0) { 2427 error = NFSERR_BADXDR; 2428 goto nfsmout; 2429 } 2430 if (j > NFSV4_SMALLSTR) 2431 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2432 else 2433 cp = namestr; 2434 error = nfsrv_mtostr(nd, cp, j); 2435 if (error) { 2436 if (j > NFSV4_SMALLSTR) 2437 free(cp, M_NFSSTRING); 2438 goto nfsmout; 2439 } 2440 if (!nd->nd_repstat) { 2441 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2442 p); 2443 if (!nd->nd_repstat) 2444 nvap->na_uid = uid; 2445 } 2446 if (j > NFSV4_SMALLSTR) 2447 free(cp, M_NFSSTRING); 2448 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2449 break; 2450 case NFSATTRBIT_OWNERGROUP: 2451 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2452 j = fxdr_unsigned(int, *tl); 2453 if (j < 0) { 2454 error = NFSERR_BADXDR; 2455 goto nfsmout; 2456 } 2457 if (j > NFSV4_SMALLSTR) 2458 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2459 else 2460 cp = namestr; 2461 error = nfsrv_mtostr(nd, cp, j); 2462 if (error) { 2463 if (j > NFSV4_SMALLSTR) 2464 free(cp, M_NFSSTRING); 2465 goto nfsmout; 2466 } 2467 if (!nd->nd_repstat) { 2468 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2469 p); 2470 if (!nd->nd_repstat) 2471 nvap->na_gid = gid; 2472 } 2473 if (j > NFSV4_SMALLSTR) 2474 free(cp, M_NFSSTRING); 2475 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2476 break; 2477 case NFSATTRBIT_SYSTEM: 2478 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2479 if (!nd->nd_repstat) 2480 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2481 attrsum += NFSX_UNSIGNED; 2482 break; 2483 case NFSATTRBIT_TIMEACCESSSET: 2484 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2485 attrsum += NFSX_UNSIGNED; 2486 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2487 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2488 fxdr_nfsv4time(tl, &nvap->na_atime); 2489 toclient = 1; 2490 attrsum += NFSX_V4TIME; 2491 } else { 2492 NFSGETTIME(&curtime); 2493 nvap->na_atime.tv_sec = curtime.tv_sec; 2494 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000; 2495 nvap->na_vaflags |= VA_UTIMES_NULL; 2496 } 2497 break; 2498 case NFSATTRBIT_TIMEBACKUP: 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_TIMECREATE: 2505 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2506 if (!nd->nd_repstat) 2507 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2508 attrsum += NFSX_V4TIME; 2509 break; 2510 case NFSATTRBIT_TIMEMODIFYSET: 2511 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2512 attrsum += NFSX_UNSIGNED; 2513 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2514 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2515 fxdr_nfsv4time(tl, &nvap->na_mtime); 2516 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2517 attrsum += NFSX_V4TIME; 2518 } else { 2519 NFSGETTIME(&curtime); 2520 nvap->na_mtime.tv_sec = curtime.tv_sec; 2521 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000; 2522 if (!toclient) 2523 nvap->na_vaflags |= VA_UTIMES_NULL; 2524 } 2525 break; 2526 default: 2527 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2528 /* 2529 * set bitpos so we drop out of the loop. 2530 */ 2531 bitpos = NFSATTRBIT_MAX; 2532 break; 2533 }; 2534 } 2535 2536 /* 2537 * some clients pad the attrlist, so we need to skip over the 2538 * padding. 2539 */ 2540 if (attrsum > attrsize) { 2541 error = NFSERR_BADXDR; 2542 } else { 2543 attrsize = NFSM_RNDUP(attrsize); 2544 if (attrsum < attrsize) 2545 error = nfsm_advance(nd, attrsize - attrsum, -1); 2546 } 2547 nfsmout: 2548 NFSEXITCODE2(error, nd); 2549 return (error); 2550 } 2551 2552 /* 2553 * Check/setup export credentials. 2554 */ 2555 int 2556 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2557 struct ucred *credanon) 2558 { 2559 int error = 0; 2560 2561 /* 2562 * Check/setup credentials. 2563 */ 2564 if (nd->nd_flag & ND_GSS) 2565 exp->nes_exflag &= ~MNT_EXPORTANON; 2566 2567 /* 2568 * Check to see if the operation is allowed for this security flavor. 2569 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2570 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2571 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2572 */ 2573 if (nfsvno_testexp(nd, exp) && 2574 nd->nd_procnum != NFSV4OP_SECINFO && 2575 nd->nd_procnum != NFSPROC_FSINFO) { 2576 if (nd->nd_flag & ND_NFSV4) 2577 error = NFSERR_WRONGSEC; 2578 else 2579 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2580 goto out; 2581 } 2582 2583 /* 2584 * Check to see if the file system is exported V4 only. 2585 */ 2586 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2587 error = NFSERR_PROGNOTV4; 2588 goto out; 2589 } 2590 2591 /* 2592 * Now, map the user credentials. 2593 * (Note that ND_AUTHNONE will only be set for an NFSv3 2594 * Fsinfo RPC. If set for anything else, this code might need 2595 * to change.) 2596 */ 2597 if (NFSVNO_EXPORTED(exp) && 2598 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) || 2599 NFSVNO_EXPORTANON(exp) || 2600 (nd->nd_flag & ND_AUTHNONE))) { 2601 nd->nd_cred->cr_uid = credanon->cr_uid; 2602 nd->nd_cred->cr_gid = credanon->cr_gid; 2603 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2604 credanon->cr_groups); 2605 } 2606 2607 out: 2608 NFSEXITCODE2(error, nd); 2609 return (error); 2610 } 2611 2612 /* 2613 * Check exports. 2614 */ 2615 int 2616 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2617 struct ucred **credp) 2618 { 2619 int i, error, *secflavors; 2620 2621 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2622 &exp->nes_numsecflavor, &secflavors); 2623 if (error) { 2624 if (nfs_rootfhset) { 2625 exp->nes_exflag = 0; 2626 exp->nes_numsecflavor = 0; 2627 error = 0; 2628 } 2629 } else { 2630 /* Copy the security flavors. */ 2631 for (i = 0; i < exp->nes_numsecflavor; i++) 2632 exp->nes_secflavors[i] = secflavors[i]; 2633 } 2634 NFSEXITCODE(error); 2635 return (error); 2636 } 2637 2638 /* 2639 * Get a vnode for a file handle and export stuff. 2640 */ 2641 int 2642 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2643 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2644 struct ucred **credp) 2645 { 2646 int i, error, *secflavors; 2647 2648 *credp = NULL; 2649 exp->nes_numsecflavor = 0; 2650 if (VFS_NEEDSGIANT(mp)) 2651 error = ESTALE; 2652 else 2653 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2654 if (error != 0) 2655 /* Make sure the server replies ESTALE to the client. */ 2656 error = ESTALE; 2657 if (nam && !error) { 2658 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2659 &exp->nes_numsecflavor, &secflavors); 2660 if (error) { 2661 if (nfs_rootfhset) { 2662 exp->nes_exflag = 0; 2663 exp->nes_numsecflavor = 0; 2664 error = 0; 2665 } else { 2666 vput(*vpp); 2667 } 2668 } else { 2669 /* Copy the security flavors. */ 2670 for (i = 0; i < exp->nes_numsecflavor; i++) 2671 exp->nes_secflavors[i] = secflavors[i]; 2672 } 2673 } 2674 NFSEXITCODE(error); 2675 return (error); 2676 } 2677 2678 /* 2679 * nfsd_fhtovp() - convert a fh to a vnode ptr 2680 * - look up fsid in mount list (if not found ret error) 2681 * - get vp and export rights by calling nfsvno_fhtovp() 2682 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2683 * for AUTH_SYS 2684 * - if mpp != NULL, return the mount point so that it can 2685 * be used for vn_finished_write() by the caller 2686 */ 2687 void 2688 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2689 struct vnode **vpp, struct nfsexstuff *exp, 2690 struct mount **mpp, int startwrite, struct thread *p) 2691 { 2692 struct mount *mp; 2693 struct ucred *credanon; 2694 fhandle_t *fhp; 2695 2696 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2697 /* 2698 * Check for the special case of the nfsv4root_fh. 2699 */ 2700 mp = vfs_busyfs(&fhp->fh_fsid); 2701 if (mpp != NULL) 2702 *mpp = mp; 2703 if (mp == NULL) { 2704 *vpp = NULL; 2705 nd->nd_repstat = ESTALE; 2706 goto out; 2707 } 2708 2709 if (startwrite) 2710 vn_start_write(NULL, mpp, V_WAIT); 2711 2712 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2713 &credanon); 2714 vfs_unbusy(mp); 2715 2716 /* 2717 * For NFSv4 without a pseudo root fs, unexported file handles 2718 * can be returned, so that Lookup works everywhere. 2719 */ 2720 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2721 !(nd->nd_flag & ND_NFSV4)) { 2722 vput(*vpp); 2723 nd->nd_repstat = EACCES; 2724 } 2725 2726 /* 2727 * Personally, I've never seen any point in requiring a 2728 * reserved port#, since only in the rare case where the 2729 * clients are all boxes with secure system priviledges, 2730 * does it provide any enhanced security, but... some people 2731 * believe it to be useful and keep putting this code back in. 2732 * (There is also some "security checker" out there that 2733 * complains if the nfs server doesn't enforce this.) 2734 * However, note the following: 2735 * RFC3530 (NFSv4) specifies that a reserved port# not be 2736 * required. 2737 * RFC2623 recommends that, if a reserved port# is checked for, 2738 * that there be a way to turn that off--> ifdef'd. 2739 */ 2740 #ifdef NFS_REQRSVPORT 2741 if (!nd->nd_repstat) { 2742 struct sockaddr_in *saddr; 2743 struct sockaddr_in6 *saddr6; 2744 2745 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2746 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2747 if (!(nd->nd_flag & ND_NFSV4) && 2748 ((saddr->sin_family == AF_INET && 2749 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2750 (saddr6->sin6_family == AF_INET6 && 2751 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2752 vput(*vpp); 2753 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2754 } 2755 } 2756 #endif /* NFS_REQRSVPORT */ 2757 2758 /* 2759 * Check/setup credentials. 2760 */ 2761 if (!nd->nd_repstat) { 2762 nd->nd_saveduid = nd->nd_cred->cr_uid; 2763 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2764 if (nd->nd_repstat) 2765 vput(*vpp); 2766 } 2767 if (credanon != NULL) 2768 crfree(credanon); 2769 if (nd->nd_repstat) { 2770 if (startwrite) 2771 vn_finished_write(mp); 2772 *vpp = NULL; 2773 if (mpp != NULL) 2774 *mpp = NULL; 2775 } 2776 2777 out: 2778 NFSEXITCODE2(0, nd); 2779 } 2780 2781 /* 2782 * glue for fp. 2783 */ 2784 int 2785 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2786 { 2787 struct filedesc *fdp; 2788 struct file *fp; 2789 int error = 0; 2790 2791 fdp = p->td_proc->p_fd; 2792 if (fd >= fdp->fd_nfiles || 2793 (fp = fdp->fd_ofiles[fd]) == NULL) { 2794 error = EBADF; 2795 goto out; 2796 } 2797 *fpp = fp; 2798 2799 out: 2800 NFSEXITCODE(error); 2801 return (error); 2802 } 2803 2804 /* 2805 * Called from nfssvc() to update the exports list. Just call 2806 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2807 * in the mount list. 2808 */ 2809 int 2810 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2811 { 2812 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2813 int error = 0; 2814 struct nameidata nd; 2815 fhandle_t fh; 2816 2817 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2818 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2819 nfs_rootfhset = 0; 2820 else if (error == 0) { 2821 if (nfsexargp->fspec == NULL) { 2822 error = EPERM; 2823 goto out; 2824 } 2825 /* 2826 * If fspec != NULL, this is the v4root path. 2827 */ 2828 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_USERSPACE, 2829 nfsexargp->fspec, p); 2830 if ((error = namei(&nd)) != 0) 2831 goto out; 2832 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2833 vrele(nd.ni_vp); 2834 if (!error) { 2835 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2836 NFSBCOPY((caddr_t)&fh, 2837 nfs_rootfh.nfsrvfh_data, 2838 sizeof (fhandle_t)); 2839 nfs_rootfhset = 1; 2840 } 2841 } 2842 2843 out: 2844 NFSEXITCODE(error); 2845 return (error); 2846 } 2847 2848 /* 2849 * Get the tcp socket sequence numbers we need. 2850 * (Maybe this should be moved to the tcp sources?) 2851 */ 2852 int 2853 nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap) 2854 { 2855 struct inpcb *inp; 2856 struct tcpcb *tp; 2857 int error = 0; 2858 2859 inp = sotoinpcb(so); 2860 KASSERT(inp != NULL, ("nfsrv_getsocksndseq: inp == NULL")); 2861 INP_RLOCK(inp); 2862 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 2863 INP_RUNLOCK(inp); 2864 error = EPIPE; 2865 goto out; 2866 } 2867 tp = intotcpcb(inp); 2868 if (tp->t_state != TCPS_ESTABLISHED) { 2869 INP_RUNLOCK(inp); 2870 error = EPIPE; 2871 goto out; 2872 } 2873 *maxp = tp->snd_max; 2874 *unap = tp->snd_una; 2875 INP_RUNLOCK(inp); 2876 2877 out: 2878 NFSEXITCODE(error); 2879 return (error); 2880 } 2881 2882 /* 2883 * This function needs to test to see if the system is near its limit 2884 * for memory allocation via malloc() or mget() and return True iff 2885 * either of these resources are near their limit. 2886 * XXX (For now, this is just a stub.) 2887 */ 2888 int nfsrv_testmalloclimit = 0; 2889 int 2890 nfsrv_mallocmget_limit(void) 2891 { 2892 static int printmesg = 0; 2893 static int testval = 1; 2894 2895 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2896 if ((printmesg++ % 100) == 0) 2897 printf("nfsd: malloc/mget near limit\n"); 2898 return (1); 2899 } 2900 return (0); 2901 } 2902 2903 /* 2904 * BSD specific initialization of a mount point. 2905 */ 2906 void 2907 nfsd_mntinit(void) 2908 { 2909 static int inited = 0; 2910 2911 if (inited) 2912 return; 2913 inited = 1; 2914 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2915 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2916 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2917 nfsv4root_mnt.mnt_export = NULL; 2918 TAILQ_INIT(&nfsv4root_opt); 2919 TAILQ_INIT(&nfsv4root_newopt); 2920 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2921 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2922 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2923 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2924 } 2925 2926 /* 2927 * Get a vnode for a file handle, without checking exports, etc. 2928 */ 2929 struct vnode * 2930 nfsvno_getvp(fhandle_t *fhp) 2931 { 2932 struct mount *mp; 2933 struct vnode *vp; 2934 int error; 2935 2936 mp = vfs_busyfs(&fhp->fh_fsid); 2937 if (mp == NULL) 2938 return (NULL); 2939 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2940 vfs_unbusy(mp); 2941 if (error) 2942 return (NULL); 2943 return (vp); 2944 } 2945 2946 /* 2947 * Do a local VOP_ADVLOCK(). 2948 */ 2949 int 2950 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2951 u_int64_t end, struct thread *td) 2952 { 2953 int error = 0; 2954 struct flock fl; 2955 u_int64_t tlen; 2956 2957 if (nfsrv_dolocallocks == 0) 2958 goto out; 2959 2960 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */ 2961 if ((vp->v_iflag & VI_DOOMED) != 0) { 2962 error = EPERM; 2963 goto out; 2964 } 2965 2966 fl.l_whence = SEEK_SET; 2967 fl.l_type = ftype; 2968 fl.l_start = (off_t)first; 2969 if (end == NFS64BITSSET) { 2970 fl.l_len = 0; 2971 } else { 2972 tlen = end - first; 2973 fl.l_len = (off_t)tlen; 2974 } 2975 /* 2976 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2977 * values for all calls, so that all locks will be held by the 2978 * nfsd server. (The nfsd server handles conflicts between the 2979 * various clients.) 2980 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2981 * bytes, so it can't be put in l_sysid. 2982 */ 2983 if (nfsv4_sysid == 0) 2984 nfsv4_sysid = nlm_acquire_next_sysid(); 2985 fl.l_pid = (pid_t)0; 2986 fl.l_sysid = (int)nfsv4_sysid; 2987 2988 NFSVOPUNLOCK(vp, 0); 2989 if (ftype == F_UNLCK) 2990 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 2991 (F_POSIX | F_REMOTE)); 2992 else 2993 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 2994 (F_POSIX | F_REMOTE)); 2995 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2996 2997 out: 2998 NFSEXITCODE(error); 2999 return (error); 3000 } 3001 3002 /* 3003 * Check the nfsv4 root exports. 3004 */ 3005 int 3006 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3007 { 3008 struct ucred *credanon; 3009 int exflags, error = 0, numsecflavor, *secflavors, i; 3010 3011 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3012 &credanon, &numsecflavor, &secflavors); 3013 if (error) { 3014 error = NFSERR_PROGUNAVAIL; 3015 goto out; 3016 } 3017 if (credanon != NULL) 3018 crfree(credanon); 3019 for (i = 0; i < numsecflavor; i++) { 3020 if (secflavors[i] == AUTH_SYS) 3021 nd->nd_flag |= ND_EXAUTHSYS; 3022 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3023 nd->nd_flag |= ND_EXGSS; 3024 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3025 nd->nd_flag |= ND_EXGSSINTEGRITY; 3026 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3027 nd->nd_flag |= ND_EXGSSPRIVACY; 3028 } 3029 3030 out: 3031 NFSEXITCODE(error); 3032 return (error); 3033 } 3034 3035 /* 3036 * Nfs server psuedo system call for the nfsd's 3037 */ 3038 /* 3039 * MPSAFE 3040 */ 3041 static int 3042 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3043 { 3044 struct file *fp; 3045 struct nfsd_addsock_args sockarg; 3046 struct nfsd_nfsd_args nfsdarg; 3047 int error; 3048 3049 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3050 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3051 if (error) 3052 goto out; 3053 /* 3054 * Since we don't know what rights might be required, 3055 * pretend that we need them all. It is better to be too 3056 * careful than too reckless. 3057 */ 3058 if ((error = fget(td, sockarg.sock, CAP_SOCK_ALL, &fp)) != 0) 3059 goto out; 3060 if (fp->f_type != DTYPE_SOCKET) { 3061 fdrop(fp, td); 3062 error = EPERM; 3063 goto out; 3064 } 3065 error = nfsrvd_addsock(fp); 3066 fdrop(fp, td); 3067 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3068 if (uap->argp == NULL) { 3069 error = EINVAL; 3070 goto out; 3071 } 3072 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3073 sizeof (nfsdarg)); 3074 if (error) 3075 goto out; 3076 error = nfsrvd_nfsd(td, &nfsdarg); 3077 } else { 3078 error = nfssvc_srvcall(td, uap, td->td_ucred); 3079 } 3080 3081 out: 3082 NFSEXITCODE(error); 3083 return (error); 3084 } 3085 3086 static int 3087 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3088 { 3089 struct nfsex_args export; 3090 struct file *fp = NULL; 3091 int stablefd, len; 3092 struct nfsd_clid adminrevoke; 3093 struct nfsd_dumplist dumplist; 3094 struct nfsd_dumpclients *dumpclients; 3095 struct nfsd_dumplocklist dumplocklist; 3096 struct nfsd_dumplocks *dumplocks; 3097 struct nameidata nd; 3098 vnode_t vp; 3099 int error = EINVAL, igotlock; 3100 struct proc *procp; 3101 static int suspend_nfsd = 0; 3102 3103 if (uap->flag & NFSSVC_PUBLICFH) { 3104 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3105 sizeof (fhandle_t)); 3106 error = copyin(uap->argp, 3107 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3108 if (!error) 3109 nfs_pubfhset = 1; 3110 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3111 error = copyin(uap->argp,(caddr_t)&export, 3112 sizeof (struct nfsex_args)); 3113 if (!error) 3114 error = nfsrv_v4rootexport(&export, cred, p); 3115 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3116 nfs_pubfhset = 0; 3117 error = 0; 3118 } else if (uap->flag & NFSSVC_STABLERESTART) { 3119 error = copyin(uap->argp, (caddr_t)&stablefd, 3120 sizeof (int)); 3121 if (!error) 3122 error = fp_getfvp(p, stablefd, &fp, &vp); 3123 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3124 error = EBADF; 3125 if (!error && newnfs_numnfsd != 0) 3126 error = EPERM; 3127 if (!error) { 3128 nfsrv_stablefirst.nsf_fp = fp; 3129 nfsrv_setupstable(p); 3130 } 3131 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3132 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3133 sizeof (struct nfsd_clid)); 3134 if (!error) 3135 error = nfsrv_adminrevoke(&adminrevoke, p); 3136 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3137 error = copyin(uap->argp, (caddr_t)&dumplist, 3138 sizeof (struct nfsd_dumplist)); 3139 if (!error && (dumplist.ndl_size < 1 || 3140 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3141 error = EPERM; 3142 if (!error) { 3143 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3144 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3145 M_TEMP, M_WAITOK); 3146 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3147 error = copyout(dumpclients, 3148 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3149 free((caddr_t)dumpclients, M_TEMP); 3150 } 3151 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3152 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3153 sizeof (struct nfsd_dumplocklist)); 3154 if (!error && (dumplocklist.ndllck_size < 1 || 3155 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3156 error = EPERM; 3157 if (!error) 3158 error = nfsrv_lookupfilename(&nd, 3159 dumplocklist.ndllck_fname, p); 3160 if (!error) { 3161 len = sizeof (struct nfsd_dumplocks) * 3162 dumplocklist.ndllck_size; 3163 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3164 M_TEMP, M_WAITOK); 3165 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3166 dumplocklist.ndllck_size, p); 3167 vput(nd.ni_vp); 3168 error = copyout(dumplocks, 3169 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3170 free((caddr_t)dumplocks, M_TEMP); 3171 } 3172 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3173 procp = p->td_proc; 3174 PROC_LOCK(procp); 3175 nfsd_master_pid = procp->p_pid; 3176 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3177 nfsd_master_start = procp->p_stats->p_start; 3178 nfsd_master_proc = procp; 3179 PROC_UNLOCK(procp); 3180 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3181 NFSLOCKV4ROOTMUTEX(); 3182 if (suspend_nfsd == 0) { 3183 /* Lock out all nfsd threads */ 3184 do { 3185 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3186 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3187 } while (igotlock == 0 && suspend_nfsd == 0); 3188 suspend_nfsd = 1; 3189 } 3190 NFSUNLOCKV4ROOTMUTEX(); 3191 error = 0; 3192 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3193 NFSLOCKV4ROOTMUTEX(); 3194 if (suspend_nfsd != 0) { 3195 nfsv4_unlock(&nfsd_suspend_lock, 0); 3196 suspend_nfsd = 0; 3197 } 3198 NFSUNLOCKV4ROOTMUTEX(); 3199 error = 0; 3200 } 3201 3202 NFSEXITCODE(error); 3203 return (error); 3204 } 3205 3206 /* 3207 * Check exports. 3208 * Returns 0 if ok, 1 otherwise. 3209 */ 3210 int 3211 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3212 { 3213 int i; 3214 3215 /* 3216 * This seems odd, but allow the case where the security flavor 3217 * list is empty. This happens when NFSv4 is traversing non-exported 3218 * file systems. Exported file systems should always have a non-empty 3219 * security flavor list. 3220 */ 3221 if (exp->nes_numsecflavor == 0) 3222 return (0); 3223 3224 for (i = 0; i < exp->nes_numsecflavor; i++) { 3225 /* 3226 * The tests for privacy and integrity must be first, 3227 * since ND_GSS is set for everything but AUTH_SYS. 3228 */ 3229 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3230 (nd->nd_flag & ND_GSSPRIVACY)) 3231 return (0); 3232 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3233 (nd->nd_flag & ND_GSSINTEGRITY)) 3234 return (0); 3235 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3236 (nd->nd_flag & ND_GSS)) 3237 return (0); 3238 if (exp->nes_secflavors[i] == AUTH_SYS && 3239 (nd->nd_flag & ND_GSS) == 0) 3240 return (0); 3241 } 3242 return (1); 3243 } 3244 3245 /* 3246 * Calculate a hash value for the fid in a file handle. 3247 */ 3248 uint32_t 3249 nfsrv_hashfh(fhandle_t *fhp) 3250 { 3251 uint32_t hashval; 3252 3253 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3254 return (hashval); 3255 } 3256 3257 /* 3258 * Signal the userland master nfsd to backup the stable restart file. 3259 */ 3260 void 3261 nfsrv_backupstable(void) 3262 { 3263 struct proc *procp; 3264 3265 if (nfsd_master_proc != NULL) { 3266 procp = pfind(nfsd_master_pid); 3267 /* Try to make sure it is the correct process. */ 3268 if (procp == nfsd_master_proc && 3269 procp->p_stats->p_start.tv_sec == 3270 nfsd_master_start.tv_sec && 3271 procp->p_stats->p_start.tv_usec == 3272 nfsd_master_start.tv_usec && 3273 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3274 kern_psignal(procp, SIGUSR2); 3275 else 3276 nfsd_master_proc = NULL; 3277 3278 if (procp != NULL) 3279 PROC_UNLOCK(procp); 3280 } 3281 } 3282 3283 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3284 3285 /* 3286 * Called once to initialize data structures... 3287 */ 3288 static int 3289 nfsd_modevent(module_t mod, int type, void *data) 3290 { 3291 int error = 0; 3292 static int loaded = 0; 3293 3294 switch (type) { 3295 case MOD_LOAD: 3296 if (loaded) 3297 goto out; 3298 newnfs_portinit(); 3299 mtx_init(&nfs_cache_mutex, "nfs_cache_mutex", NULL, MTX_DEF); 3300 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF); 3301 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL, 3302 MTX_DEF); 3303 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3304 nfsrvd_initcache(); 3305 nfsd_init(); 3306 NFSD_LOCK(); 3307 nfsrvd_init(0); 3308 NFSD_UNLOCK(); 3309 nfsd_mntinit(); 3310 #ifdef VV_DISABLEDELEG 3311 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3312 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3313 #endif 3314 nfsd_call_servertimer = nfsrv_servertimer; 3315 nfsd_call_nfsd = nfssvc_nfsd; 3316 loaded = 1; 3317 break; 3318 3319 case MOD_UNLOAD: 3320 if (newnfs_numnfsd != 0) { 3321 error = EBUSY; 3322 break; 3323 } 3324 3325 #ifdef VV_DISABLEDELEG 3326 vn_deleg_ops.vndeleg_recall = NULL; 3327 vn_deleg_ops.vndeleg_disable = NULL; 3328 #endif 3329 nfsd_call_servertimer = NULL; 3330 nfsd_call_nfsd = NULL; 3331 3332 /* Clean out all NFSv4 state. */ 3333 nfsrv_throwawayallstate(curthread); 3334 3335 /* Clean the NFS server reply cache */ 3336 nfsrvd_cleancache(); 3337 3338 /* Free up the krpc server pool. */ 3339 if (nfsrvd_pool != NULL) 3340 svcpool_destroy(nfsrvd_pool); 3341 3342 /* and get rid of the locks */ 3343 mtx_destroy(&nfs_cache_mutex); 3344 mtx_destroy(&nfs_v4root_mutex); 3345 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3346 lockdestroy(&nfsv4root_mnt.mnt_explock); 3347 loaded = 0; 3348 break; 3349 default: 3350 error = EOPNOTSUPP; 3351 break; 3352 } 3353 3354 out: 3355 NFSEXITCODE(error); 3356 return (error); 3357 } 3358 static moduledata_t nfsd_mod = { 3359 "nfsd", 3360 nfsd_modevent, 3361 NULL, 3362 }; 3363 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3364 3365 /* So that loader and kldload(2) can find us, wherever we are.. */ 3366 MODULE_VERSION(nfsd, 1); 3367 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3368 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3369 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3370 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3371 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3372 3373