1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/capability.h> 38 39 /* 40 * Functions that perform the vfs operations required by the routines in 41 * nfsd_serv.c. It is hoped that this change will make the server more 42 * portable. 43 */ 44 45 #include <fs/nfs/nfsport.h> 46 #include <sys/hash.h> 47 #include <sys/sysctl.h> 48 #include <nlm/nlm_prot.h> 49 #include <nlm/nlm.h> 50 51 FEATURE(nfsd, "NFSv4 server"); 52 53 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 54 extern int nfsrv_useacl; 55 extern int newnfs_numnfsd; 56 extern struct mount nfsv4root_mnt; 57 extern struct nfsrv_stablefirst nfsrv_stablefirst; 58 extern void (*nfsd_call_servertimer)(void); 59 extern SVCPOOL *nfsrvd_pool; 60 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 61 NFSDLOCKMUTEX; 62 struct mtx nfs_cache_mutex; 63 struct mtx nfs_v4root_mutex; 64 struct nfsrvfh nfs_rootfh, nfs_pubfh; 65 int nfs_pubfhset = 0, nfs_rootfhset = 0; 66 struct proc *nfsd_master_proc = NULL; 67 static pid_t nfsd_master_pid = (pid_t)-1; 68 static char nfsd_master_comm[MAXCOMLEN + 1]; 69 static struct timeval nfsd_master_start; 70 static uint32_t nfsv4_sysid = 0; 71 72 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 73 struct ucred *); 74 75 int nfsrv_enable_crossmntpt = 1; 76 static int nfs_commit_blks; 77 static int nfs_commit_miss; 78 extern int nfsrv_issuedelegs; 79 extern int nfsrv_dolocallocks; 80 81 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server"); 82 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 83 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 84 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 85 0, ""); 86 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 87 0, ""); 88 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 89 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 90 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 91 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 92 93 #define MAX_REORDERED_RPC 16 94 #define NUM_HEURISTIC 1031 95 #define NHUSE_INIT 64 96 #define NHUSE_INC 16 97 #define NHUSE_MAX 2048 98 99 static struct nfsheur { 100 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 101 off_t nh_nextoff; /* next offset for sequential detection */ 102 int nh_use; /* use count for selection */ 103 int nh_seqcount; /* heuristic */ 104 } nfsheur[NUM_HEURISTIC]; 105 106 107 /* 108 * Heuristic to detect sequential operation. 109 */ 110 static struct nfsheur * 111 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 112 { 113 struct nfsheur *nh; 114 int hi, try; 115 116 /* Locate best candidate. */ 117 try = 32; 118 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 119 nh = &nfsheur[hi]; 120 while (try--) { 121 if (nfsheur[hi].nh_vp == vp) { 122 nh = &nfsheur[hi]; 123 break; 124 } 125 if (nfsheur[hi].nh_use > 0) 126 --nfsheur[hi].nh_use; 127 hi = (hi + 1) % NUM_HEURISTIC; 128 if (nfsheur[hi].nh_use < nh->nh_use) 129 nh = &nfsheur[hi]; 130 } 131 132 /* Initialize hint if this is a new file. */ 133 if (nh->nh_vp != vp) { 134 nh->nh_vp = vp; 135 nh->nh_nextoff = uio->uio_offset; 136 nh->nh_use = NHUSE_INIT; 137 if (uio->uio_offset == 0) 138 nh->nh_seqcount = 4; 139 else 140 nh->nh_seqcount = 1; 141 } 142 143 /* Calculate heuristic. */ 144 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 145 uio->uio_offset == nh->nh_nextoff) { 146 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 147 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 148 if (nh->nh_seqcount > IO_SEQMAX) 149 nh->nh_seqcount = IO_SEQMAX; 150 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 151 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 152 /* Probably a reordered RPC, leave seqcount alone. */ 153 } else if (nh->nh_seqcount > 1) { 154 nh->nh_seqcount /= 2; 155 } else { 156 nh->nh_seqcount = 0; 157 } 158 nh->nh_use += NHUSE_INC; 159 if (nh->nh_use > NHUSE_MAX) 160 nh->nh_use = NHUSE_MAX; 161 return (nh); 162 } 163 164 /* 165 * Get attributes into nfsvattr structure. 166 */ 167 int 168 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 169 struct thread *p, int vpislocked) 170 { 171 int error, lockedit = 0; 172 173 if (vpislocked == 0) { 174 /* 175 * When vpislocked == 0, the vnode is either exclusively 176 * locked by this thread or not locked by this thread. 177 * As such, shared lock it, if not exclusively locked. 178 */ 179 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 180 lockedit = 1; 181 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 182 } 183 } 184 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 185 if (lockedit != 0) 186 NFSVOPUNLOCK(vp, 0); 187 188 NFSEXITCODE(error); 189 return (error); 190 } 191 192 /* 193 * Get a file handle for a vnode. 194 */ 195 int 196 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 197 { 198 int error; 199 200 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 201 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 202 error = VOP_VPTOFH(vp, &fhp->fh_fid); 203 204 NFSEXITCODE(error); 205 return (error); 206 } 207 208 /* 209 * Perform access checking for vnodes obtained from file handles that would 210 * refer to files already opened by a Unix client. You cannot just use 211 * vn_writechk() and VOP_ACCESSX() for two reasons. 212 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 213 * case. 214 * 2 - The owner is to be given access irrespective of mode bits for some 215 * operations, so that processes that chmod after opening a file don't 216 * break. 217 */ 218 int 219 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 220 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 221 u_int32_t *supportedtypep) 222 { 223 struct vattr vattr; 224 int error = 0, getret = 0; 225 226 if (vpislocked == 0) { 227 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 228 error = EPERM; 229 goto out; 230 } 231 } 232 if (accmode & VWRITE) { 233 /* Just vn_writechk() changed to check rdonly */ 234 /* 235 * Disallow write attempts on read-only file systems; 236 * unless the file is a socket or a block or character 237 * device resident on the file system. 238 */ 239 if (NFSVNO_EXRDONLY(exp) || 240 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 241 switch (vp->v_type) { 242 case VREG: 243 case VDIR: 244 case VLNK: 245 error = EROFS; 246 default: 247 break; 248 } 249 } 250 /* 251 * If there's shared text associated with 252 * the inode, try to free it up once. If 253 * we fail, we can't allow writing. 254 */ 255 if ((vp->v_vflag & VV_TEXT) != 0 && error == 0) 256 error = ETXTBSY; 257 } 258 if (error != 0) { 259 if (vpislocked == 0) 260 NFSVOPUNLOCK(vp, 0); 261 goto out; 262 } 263 264 /* 265 * Should the override still be applied when ACLs are enabled? 266 */ 267 error = VOP_ACCESSX(vp, accmode, cred, p); 268 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 269 /* 270 * Try again with VEXPLICIT_DENY, to see if the test for 271 * deletion is supported. 272 */ 273 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 274 if (error == 0) { 275 if (vp->v_type == VDIR) { 276 accmode &= ~(VDELETE | VDELETE_CHILD); 277 accmode |= VWRITE; 278 error = VOP_ACCESSX(vp, accmode, cred, p); 279 } else if (supportedtypep != NULL) { 280 *supportedtypep &= ~NFSACCESS_DELETE; 281 } 282 } 283 } 284 285 /* 286 * Allow certain operations for the owner (reads and writes 287 * on files that are already open). 288 */ 289 if (override != NFSACCCHK_NOOVERRIDE && 290 (error == EPERM || error == EACCES)) { 291 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 292 error = 0; 293 else if (override & NFSACCCHK_ALLOWOWNER) { 294 getret = VOP_GETATTR(vp, &vattr, cred); 295 if (getret == 0 && cred->cr_uid == vattr.va_uid) 296 error = 0; 297 } 298 } 299 if (vpislocked == 0) 300 NFSVOPUNLOCK(vp, 0); 301 302 out: 303 NFSEXITCODE(error); 304 return (error); 305 } 306 307 /* 308 * Set attribute(s) vnop. 309 */ 310 int 311 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 312 struct thread *p, struct nfsexstuff *exp) 313 { 314 int error; 315 316 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 317 NFSEXITCODE(error); 318 return (error); 319 } 320 321 /* 322 * Set up nameidata for a lookup() call and do it 323 * For the cases where we are crossing mount points 324 * (looking up the public fh path or the v4 root path when 325 * not using a pseudo-root fs), set/release the Giant lock, 326 * as required. 327 */ 328 int 329 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 330 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 331 struct vnode **retdirp) 332 { 333 struct componentname *cnp = &ndp->ni_cnd; 334 int i; 335 struct iovec aiov; 336 struct uio auio; 337 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 338 int error = 0, crossmnt; 339 char *cp; 340 341 *retdirp = NULL; 342 cnp->cn_nameptr = cnp->cn_pnbuf; 343 ndp->ni_strictrelative = 0; 344 /* 345 * Extract and set starting directory. 346 */ 347 if (dp->v_type != VDIR) { 348 if (islocked) 349 vput(dp); 350 else 351 vrele(dp); 352 nfsvno_relpathbuf(ndp); 353 error = ENOTDIR; 354 goto out1; 355 } 356 if (islocked) 357 NFSVOPUNLOCK(dp, 0); 358 VREF(dp); 359 *retdirp = dp; 360 if (NFSVNO_EXRDONLY(exp)) 361 cnp->cn_flags |= RDONLY; 362 ndp->ni_segflg = UIO_SYSSPACE; 363 crossmnt = 1; 364 365 if (nd->nd_flag & ND_PUBLOOKUP) { 366 ndp->ni_loopcnt = 0; 367 if (cnp->cn_pnbuf[0] == '/') { 368 vrele(dp); 369 /* 370 * Check for degenerate pathnames here, since lookup() 371 * panics on them. 372 */ 373 for (i = 1; i < ndp->ni_pathlen; i++) 374 if (cnp->cn_pnbuf[i] != '/') 375 break; 376 if (i == ndp->ni_pathlen) { 377 error = NFSERR_ACCES; 378 goto out; 379 } 380 dp = rootvnode; 381 VREF(dp); 382 } 383 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 384 (nd->nd_flag & ND_NFSV4) == 0) { 385 /* 386 * Only cross mount points for NFSv4 when doing a 387 * mount while traversing the file system above 388 * the mount point, unless nfsrv_enable_crossmntpt is set. 389 */ 390 cnp->cn_flags |= NOCROSSMOUNT; 391 crossmnt = 0; 392 } 393 394 /* 395 * Initialize for scan, set ni_startdir and bump ref on dp again 396 * becuase lookup() will dereference ni_startdir. 397 */ 398 399 cnp->cn_thread = p; 400 ndp->ni_startdir = dp; 401 ndp->ni_rootdir = rootvnode; 402 403 if (!lockleaf) 404 cnp->cn_flags |= LOCKLEAF; 405 for (;;) { 406 cnp->cn_nameptr = cnp->cn_pnbuf; 407 /* 408 * Call lookup() to do the real work. If an error occurs, 409 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 410 * we do not have to dereference anything before returning. 411 * In either case ni_startdir will be dereferenced and NULLed 412 * out. 413 */ 414 error = lookup(ndp); 415 if (error) 416 break; 417 418 /* 419 * Check for encountering a symbolic link. Trivial 420 * termination occurs if no symlink encountered. 421 */ 422 if ((cnp->cn_flags & ISSYMLINK) == 0) { 423 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 424 nfsvno_relpathbuf(ndp); 425 if (ndp->ni_vp && !lockleaf) 426 NFSVOPUNLOCK(ndp->ni_vp, 0); 427 break; 428 } 429 430 /* 431 * Validate symlink 432 */ 433 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 434 NFSVOPUNLOCK(ndp->ni_dvp, 0); 435 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 436 error = EINVAL; 437 goto badlink2; 438 } 439 440 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 441 error = ELOOP; 442 goto badlink2; 443 } 444 if (ndp->ni_pathlen > 1) 445 cp = uma_zalloc(namei_zone, M_WAITOK); 446 else 447 cp = cnp->cn_pnbuf; 448 aiov.iov_base = cp; 449 aiov.iov_len = MAXPATHLEN; 450 auio.uio_iov = &aiov; 451 auio.uio_iovcnt = 1; 452 auio.uio_offset = 0; 453 auio.uio_rw = UIO_READ; 454 auio.uio_segflg = UIO_SYSSPACE; 455 auio.uio_td = NULL; 456 auio.uio_resid = MAXPATHLEN; 457 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 458 if (error) { 459 badlink1: 460 if (ndp->ni_pathlen > 1) 461 uma_zfree(namei_zone, cp); 462 badlink2: 463 vrele(ndp->ni_dvp); 464 vput(ndp->ni_vp); 465 break; 466 } 467 linklen = MAXPATHLEN - auio.uio_resid; 468 if (linklen == 0) { 469 error = ENOENT; 470 goto badlink1; 471 } 472 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 473 error = ENAMETOOLONG; 474 goto badlink1; 475 } 476 477 /* 478 * Adjust or replace path 479 */ 480 if (ndp->ni_pathlen > 1) { 481 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 482 uma_zfree(namei_zone, cnp->cn_pnbuf); 483 cnp->cn_pnbuf = cp; 484 } else 485 cnp->cn_pnbuf[linklen] = '\0'; 486 ndp->ni_pathlen += linklen; 487 488 /* 489 * Cleanup refs for next loop and check if root directory 490 * should replace current directory. Normally ni_dvp 491 * becomes the new base directory and is cleaned up when 492 * we loop. Explicitly null pointers after invalidation 493 * to clarify operation. 494 */ 495 vput(ndp->ni_vp); 496 ndp->ni_vp = NULL; 497 498 if (cnp->cn_pnbuf[0] == '/') { 499 vrele(ndp->ni_dvp); 500 ndp->ni_dvp = ndp->ni_rootdir; 501 VREF(ndp->ni_dvp); 502 } 503 ndp->ni_startdir = ndp->ni_dvp; 504 ndp->ni_dvp = NULL; 505 } 506 if (!lockleaf) 507 cnp->cn_flags &= ~LOCKLEAF; 508 509 out: 510 if (error) { 511 uma_zfree(namei_zone, cnp->cn_pnbuf); 512 ndp->ni_vp = NULL; 513 ndp->ni_dvp = NULL; 514 ndp->ni_startdir = NULL; 515 cnp->cn_flags &= ~HASBUF; 516 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 517 ndp->ni_dvp = NULL; 518 } 519 520 out1: 521 NFSEXITCODE2(error, nd); 522 return (error); 523 } 524 525 /* 526 * Set up a pathname buffer and return a pointer to it and, optionally 527 * set a hash pointer. 528 */ 529 void 530 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 531 { 532 struct componentname *cnp = &ndp->ni_cnd; 533 534 cnp->cn_flags |= (NOMACCHECK | HASBUF); 535 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 536 if (hashpp != NULL) 537 *hashpp = NULL; 538 *bufpp = cnp->cn_pnbuf; 539 } 540 541 /* 542 * Release the above path buffer, if not released by nfsvno_namei(). 543 */ 544 void 545 nfsvno_relpathbuf(struct nameidata *ndp) 546 { 547 548 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 549 panic("nfsrelpath"); 550 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 551 ndp->ni_cnd.cn_flags &= ~HASBUF; 552 } 553 554 /* 555 * Readlink vnode op into an mbuf list. 556 */ 557 int 558 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 559 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 560 { 561 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 562 struct iovec *ivp = iv; 563 struct uio io, *uiop = &io; 564 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 565 int i, len, tlen, error = 0; 566 567 len = 0; 568 i = 0; 569 while (len < NFS_MAXPATHLEN) { 570 NFSMGET(mp); 571 MCLGET(mp, M_WAIT); 572 mp->m_len = NFSMSIZ(mp); 573 if (len == 0) { 574 mp3 = mp2 = mp; 575 } else { 576 mp2->m_next = mp; 577 mp2 = mp; 578 } 579 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 580 mp->m_len = NFS_MAXPATHLEN - len; 581 len = NFS_MAXPATHLEN; 582 } else { 583 len += mp->m_len; 584 } 585 ivp->iov_base = mtod(mp, caddr_t); 586 ivp->iov_len = mp->m_len; 587 i++; 588 ivp++; 589 } 590 uiop->uio_iov = iv; 591 uiop->uio_iovcnt = i; 592 uiop->uio_offset = 0; 593 uiop->uio_resid = len; 594 uiop->uio_rw = UIO_READ; 595 uiop->uio_segflg = UIO_SYSSPACE; 596 uiop->uio_td = NULL; 597 error = VOP_READLINK(vp, uiop, cred); 598 if (error) { 599 m_freem(mp3); 600 *lenp = 0; 601 goto out; 602 } 603 if (uiop->uio_resid > 0) { 604 len -= uiop->uio_resid; 605 tlen = NFSM_RNDUP(len); 606 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 607 } 608 *lenp = len; 609 *mpp = mp3; 610 *mpendp = mp; 611 612 out: 613 NFSEXITCODE(error); 614 return (error); 615 } 616 617 /* 618 * Read vnode op call into mbuf list. 619 */ 620 int 621 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 622 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 623 { 624 struct mbuf *m; 625 int i; 626 struct iovec *iv; 627 struct iovec *iv2; 628 int error = 0, len, left, siz, tlen, ioflag = 0; 629 struct mbuf *m2 = NULL, *m3; 630 struct uio io, *uiop = &io; 631 struct nfsheur *nh; 632 633 len = left = NFSM_RNDUP(cnt); 634 m3 = NULL; 635 /* 636 * Generate the mbuf list with the uio_iov ref. to it. 637 */ 638 i = 0; 639 while (left > 0) { 640 NFSMGET(m); 641 MCLGET(m, M_WAIT); 642 m->m_len = 0; 643 siz = min(M_TRAILINGSPACE(m), left); 644 left -= siz; 645 i++; 646 if (m3) 647 m2->m_next = m; 648 else 649 m3 = m; 650 m2 = m; 651 } 652 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 653 M_TEMP, M_WAITOK); 654 uiop->uio_iov = iv2 = iv; 655 m = m3; 656 left = len; 657 i = 0; 658 while (left > 0) { 659 if (m == NULL) 660 panic("nfsvno_read iov"); 661 siz = min(M_TRAILINGSPACE(m), left); 662 if (siz > 0) { 663 iv->iov_base = mtod(m, caddr_t) + m->m_len; 664 iv->iov_len = siz; 665 m->m_len += siz; 666 left -= siz; 667 iv++; 668 i++; 669 } 670 m = m->m_next; 671 } 672 uiop->uio_iovcnt = i; 673 uiop->uio_offset = off; 674 uiop->uio_resid = len; 675 uiop->uio_rw = UIO_READ; 676 uiop->uio_segflg = UIO_SYSSPACE; 677 nh = nfsrv_sequential_heuristic(uiop, vp); 678 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 679 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 680 FREE((caddr_t)iv2, M_TEMP); 681 if (error) { 682 m_freem(m3); 683 *mpp = NULL; 684 goto out; 685 } 686 nh->nh_nextoff = uiop->uio_offset; 687 tlen = len - uiop->uio_resid; 688 cnt = cnt < tlen ? cnt : tlen; 689 tlen = NFSM_RNDUP(cnt); 690 if (tlen == 0) { 691 m_freem(m3); 692 m3 = NULL; 693 } else if (len != tlen || tlen != cnt) 694 nfsrv_adj(m3, len - tlen, tlen - cnt); 695 *mpp = m3; 696 *mpendp = m2; 697 698 out: 699 NFSEXITCODE(error); 700 return (error); 701 } 702 703 /* 704 * Write vnode op from an mbuf list. 705 */ 706 int 707 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 708 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 709 { 710 struct iovec *ivp; 711 int i, len; 712 struct iovec *iv; 713 int ioflags, error; 714 struct uio io, *uiop = &io; 715 struct nfsheur *nh; 716 717 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 718 M_WAITOK); 719 uiop->uio_iov = iv = ivp; 720 uiop->uio_iovcnt = cnt; 721 i = mtod(mp, caddr_t) + mp->m_len - cp; 722 len = retlen; 723 while (len > 0) { 724 if (mp == NULL) 725 panic("nfsvno_write"); 726 if (i > 0) { 727 i = min(i, len); 728 ivp->iov_base = cp; 729 ivp->iov_len = i; 730 ivp++; 731 len -= i; 732 } 733 mp = mp->m_next; 734 if (mp) { 735 i = mp->m_len; 736 cp = mtod(mp, caddr_t); 737 } 738 } 739 740 if (stable == NFSWRITE_UNSTABLE) 741 ioflags = IO_NODELOCKED; 742 else 743 ioflags = (IO_SYNC | IO_NODELOCKED); 744 uiop->uio_resid = retlen; 745 uiop->uio_rw = UIO_WRITE; 746 uiop->uio_segflg = UIO_SYSSPACE; 747 NFSUIOPROC(uiop, p); 748 uiop->uio_offset = off; 749 nh = nfsrv_sequential_heuristic(uiop, vp); 750 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 751 error = VOP_WRITE(vp, uiop, ioflags, cred); 752 if (error == 0) 753 nh->nh_nextoff = uiop->uio_offset; 754 FREE((caddr_t)iv, M_TEMP); 755 756 NFSEXITCODE(error); 757 return (error); 758 } 759 760 /* 761 * Common code for creating a regular file (plus special files for V2). 762 */ 763 int 764 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 765 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 766 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 767 { 768 u_quad_t tempsize; 769 int error; 770 771 error = nd->nd_repstat; 772 if (!error && ndp->ni_vp == NULL) { 773 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 774 vrele(ndp->ni_startdir); 775 error = VOP_CREATE(ndp->ni_dvp, 776 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 777 vput(ndp->ni_dvp); 778 nfsvno_relpathbuf(ndp); 779 if (!error) { 780 if (*exclusive_flagp) { 781 *exclusive_flagp = 0; 782 NFSVNO_ATTRINIT(nvap); 783 nvap->na_atime.tv_sec = cverf[0]; 784 nvap->na_atime.tv_nsec = cverf[1]; 785 error = VOP_SETATTR(ndp->ni_vp, 786 &nvap->na_vattr, nd->nd_cred); 787 } 788 } 789 /* 790 * NFS V2 Only. nfsrvd_mknod() does this for V3. 791 * (This implies, just get out on an error.) 792 */ 793 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 794 nvap->na_type == VFIFO) { 795 if (nvap->na_type == VCHR && rdev == 0xffffffff) 796 nvap->na_type = VFIFO; 797 if (nvap->na_type != VFIFO && 798 (error = priv_check_cred(nd->nd_cred, 799 PRIV_VFS_MKNOD_DEV, 0))) { 800 vrele(ndp->ni_startdir); 801 nfsvno_relpathbuf(ndp); 802 vput(ndp->ni_dvp); 803 goto out; 804 } 805 nvap->na_rdev = rdev; 806 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 807 &ndp->ni_cnd, &nvap->na_vattr); 808 vput(ndp->ni_dvp); 809 nfsvno_relpathbuf(ndp); 810 vrele(ndp->ni_startdir); 811 if (error) 812 goto out; 813 } else { 814 vrele(ndp->ni_startdir); 815 nfsvno_relpathbuf(ndp); 816 vput(ndp->ni_dvp); 817 error = ENXIO; 818 goto out; 819 } 820 *vpp = ndp->ni_vp; 821 } else { 822 /* 823 * Handle cases where error is already set and/or 824 * the file exists. 825 * 1 - clean up the lookup 826 * 2 - iff !error and na_size set, truncate it 827 */ 828 vrele(ndp->ni_startdir); 829 nfsvno_relpathbuf(ndp); 830 *vpp = ndp->ni_vp; 831 if (ndp->ni_dvp == *vpp) 832 vrele(ndp->ni_dvp); 833 else 834 vput(ndp->ni_dvp); 835 if (!error && nvap->na_size != VNOVAL) { 836 error = nfsvno_accchk(*vpp, VWRITE, 837 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 838 NFSACCCHK_VPISLOCKED, NULL); 839 if (!error) { 840 tempsize = nvap->na_size; 841 NFSVNO_ATTRINIT(nvap); 842 nvap->na_size = tempsize; 843 error = VOP_SETATTR(*vpp, 844 &nvap->na_vattr, nd->nd_cred); 845 } 846 } 847 if (error) 848 vput(*vpp); 849 } 850 851 out: 852 NFSEXITCODE(error); 853 return (error); 854 } 855 856 /* 857 * Do a mknod vnode op. 858 */ 859 int 860 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 861 struct thread *p) 862 { 863 int error = 0; 864 enum vtype vtyp; 865 866 vtyp = nvap->na_type; 867 /* 868 * Iff doesn't exist, create it. 869 */ 870 if (ndp->ni_vp) { 871 vrele(ndp->ni_startdir); 872 nfsvno_relpathbuf(ndp); 873 vput(ndp->ni_dvp); 874 vrele(ndp->ni_vp); 875 error = EEXIST; 876 goto out; 877 } 878 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 879 vrele(ndp->ni_startdir); 880 nfsvno_relpathbuf(ndp); 881 vput(ndp->ni_dvp); 882 error = NFSERR_BADTYPE; 883 goto out; 884 } 885 if (vtyp == VSOCK) { 886 vrele(ndp->ni_startdir); 887 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 888 &ndp->ni_cnd, &nvap->na_vattr); 889 vput(ndp->ni_dvp); 890 nfsvno_relpathbuf(ndp); 891 } else { 892 if (nvap->na_type != VFIFO && 893 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 894 vrele(ndp->ni_startdir); 895 nfsvno_relpathbuf(ndp); 896 vput(ndp->ni_dvp); 897 goto out; 898 } 899 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 900 &ndp->ni_cnd, &nvap->na_vattr); 901 vput(ndp->ni_dvp); 902 nfsvno_relpathbuf(ndp); 903 vrele(ndp->ni_startdir); 904 /* 905 * Since VOP_MKNOD returns the ni_vp, I can't 906 * see any reason to do the lookup. 907 */ 908 } 909 910 out: 911 NFSEXITCODE(error); 912 return (error); 913 } 914 915 /* 916 * Mkdir vnode op. 917 */ 918 int 919 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 920 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 921 { 922 int error = 0; 923 924 if (ndp->ni_vp != NULL) { 925 if (ndp->ni_dvp == ndp->ni_vp) 926 vrele(ndp->ni_dvp); 927 else 928 vput(ndp->ni_dvp); 929 vrele(ndp->ni_vp); 930 nfsvno_relpathbuf(ndp); 931 error = EEXIST; 932 goto out; 933 } 934 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 935 &nvap->na_vattr); 936 vput(ndp->ni_dvp); 937 nfsvno_relpathbuf(ndp); 938 939 out: 940 NFSEXITCODE(error); 941 return (error); 942 } 943 944 /* 945 * symlink vnode op. 946 */ 947 int 948 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 949 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 950 struct nfsexstuff *exp) 951 { 952 int error = 0; 953 954 if (ndp->ni_vp) { 955 vrele(ndp->ni_startdir); 956 nfsvno_relpathbuf(ndp); 957 if (ndp->ni_dvp == ndp->ni_vp) 958 vrele(ndp->ni_dvp); 959 else 960 vput(ndp->ni_dvp); 961 vrele(ndp->ni_vp); 962 error = EEXIST; 963 goto out; 964 } 965 966 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 967 &nvap->na_vattr, pathcp); 968 vput(ndp->ni_dvp); 969 vrele(ndp->ni_startdir); 970 nfsvno_relpathbuf(ndp); 971 /* 972 * Although FreeBSD still had the lookup code in 973 * it for 7/current, there doesn't seem to be any 974 * point, since VOP_SYMLINK() returns the ni_vp. 975 * Just vput it for v2. 976 */ 977 if (!not_v2 && !error) 978 vput(ndp->ni_vp); 979 980 out: 981 NFSEXITCODE(error); 982 return (error); 983 } 984 985 /* 986 * Parse symbolic link arguments. 987 * This function has an ugly side effect. It will MALLOC() an area for 988 * the symlink and set iov_base to point to it, only if it succeeds. 989 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 990 * be FREE'd later. 991 */ 992 int 993 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 994 struct thread *p, char **pathcpp, int *lenp) 995 { 996 u_int32_t *tl; 997 char *pathcp = NULL; 998 int error = 0, len; 999 struct nfsv2_sattr *sp; 1000 1001 *pathcpp = NULL; 1002 *lenp = 0; 1003 if ((nd->nd_flag & ND_NFSV3) && 1004 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p))) 1005 goto nfsmout; 1006 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1007 len = fxdr_unsigned(int, *tl); 1008 if (len > NFS_MAXPATHLEN || len <= 0) { 1009 error = EBADRPC; 1010 goto nfsmout; 1011 } 1012 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1013 error = nfsrv_mtostr(nd, pathcp, len); 1014 if (error) 1015 goto nfsmout; 1016 if (nd->nd_flag & ND_NFSV2) { 1017 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1018 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1019 } 1020 *pathcpp = pathcp; 1021 *lenp = len; 1022 NFSEXITCODE2(0, nd); 1023 return (0); 1024 nfsmout: 1025 if (pathcp) 1026 free(pathcp, M_TEMP); 1027 NFSEXITCODE2(error, nd); 1028 return (error); 1029 } 1030 1031 /* 1032 * Remove a non-directory object. 1033 */ 1034 int 1035 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1036 struct thread *p, struct nfsexstuff *exp) 1037 { 1038 struct vnode *vp; 1039 int error = 0; 1040 1041 vp = ndp->ni_vp; 1042 if (vp->v_type == VDIR) 1043 error = NFSERR_ISDIR; 1044 else if (is_v4) 1045 error = nfsrv_checkremove(vp, 1, p); 1046 if (!error) 1047 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1048 if (ndp->ni_dvp == vp) 1049 vrele(ndp->ni_dvp); 1050 else 1051 vput(ndp->ni_dvp); 1052 vput(vp); 1053 NFSEXITCODE(error); 1054 return (error); 1055 } 1056 1057 /* 1058 * Remove a directory. 1059 */ 1060 int 1061 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1062 struct thread *p, struct nfsexstuff *exp) 1063 { 1064 struct vnode *vp; 1065 int error = 0; 1066 1067 vp = ndp->ni_vp; 1068 if (vp->v_type != VDIR) { 1069 error = ENOTDIR; 1070 goto out; 1071 } 1072 /* 1073 * No rmdir "." please. 1074 */ 1075 if (ndp->ni_dvp == vp) { 1076 error = EINVAL; 1077 goto out; 1078 } 1079 /* 1080 * The root of a mounted filesystem cannot be deleted. 1081 */ 1082 if (vp->v_vflag & VV_ROOT) 1083 error = EBUSY; 1084 out: 1085 if (!error) 1086 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1087 if (ndp->ni_dvp == vp) 1088 vrele(ndp->ni_dvp); 1089 else 1090 vput(ndp->ni_dvp); 1091 vput(vp); 1092 NFSEXITCODE(error); 1093 return (error); 1094 } 1095 1096 /* 1097 * Rename vnode op. 1098 */ 1099 int 1100 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1101 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1102 { 1103 struct vnode *fvp, *tvp, *tdvp; 1104 int error = 0; 1105 1106 fvp = fromndp->ni_vp; 1107 if (ndstat) { 1108 vrele(fromndp->ni_dvp); 1109 vrele(fvp); 1110 error = ndstat; 1111 goto out1; 1112 } 1113 tdvp = tondp->ni_dvp; 1114 tvp = tondp->ni_vp; 1115 if (tvp != NULL) { 1116 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1117 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1118 goto out; 1119 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1120 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1121 goto out; 1122 } 1123 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1124 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1125 goto out; 1126 } 1127 1128 /* 1129 * A rename to '.' or '..' results in a prematurely 1130 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1131 * here. 1132 */ 1133 if ((tondp->ni_cnd.cn_namelen == 1 && 1134 tondp->ni_cnd.cn_nameptr[0] == '.') || 1135 (tondp->ni_cnd.cn_namelen == 2 && 1136 tondp->ni_cnd.cn_nameptr[0] == '.' && 1137 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1138 error = EINVAL; 1139 goto out; 1140 } 1141 } 1142 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1143 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1144 goto out; 1145 } 1146 if (fvp->v_mount != tdvp->v_mount) { 1147 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1148 goto out; 1149 } 1150 if (fvp == tdvp) { 1151 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1152 goto out; 1153 } 1154 if (fvp == tvp) { 1155 /* 1156 * If source and destination are the same, there is nothing to 1157 * do. Set error to -1 to indicate this. 1158 */ 1159 error = -1; 1160 goto out; 1161 } 1162 if (ndflag & ND_NFSV4) { 1163 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1164 error = nfsrv_checkremove(fvp, 0, p); 1165 NFSVOPUNLOCK(fvp, 0); 1166 } else 1167 error = EPERM; 1168 if (tvp && !error) 1169 error = nfsrv_checkremove(tvp, 1, p); 1170 } else { 1171 /* 1172 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1173 * that the NFSv4 client won't be confused by the rename. 1174 * Since nfsd_recalldelegation() can only be called on an 1175 * unlocked vnode at this point and fvp is the file that will 1176 * still exist after the rename, just do fvp. 1177 */ 1178 nfsd_recalldelegation(fvp, p); 1179 } 1180 out: 1181 if (!error) { 1182 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1183 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1184 &tondp->ni_cnd); 1185 } else { 1186 if (tdvp == tvp) 1187 vrele(tdvp); 1188 else 1189 vput(tdvp); 1190 if (tvp) 1191 vput(tvp); 1192 vrele(fromndp->ni_dvp); 1193 vrele(fvp); 1194 if (error == -1) 1195 error = 0; 1196 } 1197 vrele(tondp->ni_startdir); 1198 nfsvno_relpathbuf(tondp); 1199 out1: 1200 vrele(fromndp->ni_startdir); 1201 nfsvno_relpathbuf(fromndp); 1202 NFSEXITCODE(error); 1203 return (error); 1204 } 1205 1206 /* 1207 * Link vnode op. 1208 */ 1209 int 1210 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1211 struct thread *p, struct nfsexstuff *exp) 1212 { 1213 struct vnode *xp; 1214 int error = 0; 1215 1216 xp = ndp->ni_vp; 1217 if (xp != NULL) { 1218 error = EEXIST; 1219 } else { 1220 xp = ndp->ni_dvp; 1221 if (vp->v_mount != xp->v_mount) 1222 error = EXDEV; 1223 } 1224 if (!error) { 1225 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1226 if ((vp->v_iflag & VI_DOOMED) == 0) 1227 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1228 else 1229 error = EPERM; 1230 if (ndp->ni_dvp == vp) 1231 vrele(ndp->ni_dvp); 1232 else 1233 vput(ndp->ni_dvp); 1234 NFSVOPUNLOCK(vp, 0); 1235 } else { 1236 if (ndp->ni_dvp == ndp->ni_vp) 1237 vrele(ndp->ni_dvp); 1238 else 1239 vput(ndp->ni_dvp); 1240 if (ndp->ni_vp) 1241 vrele(ndp->ni_vp); 1242 } 1243 nfsvno_relpathbuf(ndp); 1244 NFSEXITCODE(error); 1245 return (error); 1246 } 1247 1248 /* 1249 * Do the fsync() appropriate for the commit. 1250 */ 1251 int 1252 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1253 struct thread *td) 1254 { 1255 int error = 0; 1256 1257 if (cnt > MAX_COMMIT_COUNT) { 1258 /* 1259 * Give up and do the whole thing 1260 */ 1261 if (vp->v_object && 1262 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1263 VM_OBJECT_LOCK(vp->v_object); 1264 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1265 VM_OBJECT_UNLOCK(vp->v_object); 1266 } 1267 error = VOP_FSYNC(vp, MNT_WAIT, td); 1268 } else { 1269 /* 1270 * Locate and synchronously write any buffers that fall 1271 * into the requested range. Note: we are assuming that 1272 * f_iosize is a power of 2. 1273 */ 1274 int iosize = vp->v_mount->mnt_stat.f_iosize; 1275 int iomask = iosize - 1; 1276 struct bufobj *bo; 1277 daddr_t lblkno; 1278 1279 /* 1280 * Align to iosize boundry, super-align to page boundry. 1281 */ 1282 if (off & iomask) { 1283 cnt += off & iomask; 1284 off &= ~(u_quad_t)iomask; 1285 } 1286 if (off & PAGE_MASK) { 1287 cnt += off & PAGE_MASK; 1288 off &= ~(u_quad_t)PAGE_MASK; 1289 } 1290 lblkno = off / iosize; 1291 1292 if (vp->v_object && 1293 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1294 VM_OBJECT_LOCK(vp->v_object); 1295 vm_object_page_clean(vp->v_object, off, off + cnt, 1296 OBJPC_SYNC); 1297 VM_OBJECT_UNLOCK(vp->v_object); 1298 } 1299 1300 bo = &vp->v_bufobj; 1301 BO_LOCK(bo); 1302 while (cnt > 0) { 1303 struct buf *bp; 1304 1305 /* 1306 * If we have a buffer and it is marked B_DELWRI we 1307 * have to lock and write it. Otherwise the prior 1308 * write is assumed to have already been committed. 1309 * 1310 * gbincore() can return invalid buffers now so we 1311 * have to check that bit as well (though B_DELWRI 1312 * should not be set if B_INVAL is set there could be 1313 * a race here since we haven't locked the buffer). 1314 */ 1315 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1316 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1317 LK_INTERLOCK, BO_MTX(bo)) == ENOLCK) { 1318 BO_LOCK(bo); 1319 continue; /* retry */ 1320 } 1321 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1322 B_DELWRI) { 1323 bremfree(bp); 1324 bp->b_flags &= ~B_ASYNC; 1325 bwrite(bp); 1326 ++nfs_commit_miss; 1327 } else 1328 BUF_UNLOCK(bp); 1329 BO_LOCK(bo); 1330 } 1331 ++nfs_commit_blks; 1332 if (cnt < iosize) 1333 break; 1334 cnt -= iosize; 1335 ++lblkno; 1336 } 1337 BO_UNLOCK(bo); 1338 } 1339 NFSEXITCODE(error); 1340 return (error); 1341 } 1342 1343 /* 1344 * Statfs vnode op. 1345 */ 1346 int 1347 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1348 { 1349 int error; 1350 1351 error = VFS_STATFS(vp->v_mount, sf); 1352 if (error == 0) { 1353 /* 1354 * Since NFS handles these values as unsigned on the 1355 * wire, there is no way to represent negative values, 1356 * so set them to 0. Without this, they will appear 1357 * to be very large positive values for clients like 1358 * Solaris10. 1359 */ 1360 if (sf->f_bavail < 0) 1361 sf->f_bavail = 0; 1362 if (sf->f_ffree < 0) 1363 sf->f_ffree = 0; 1364 } 1365 NFSEXITCODE(error); 1366 return (error); 1367 } 1368 1369 /* 1370 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1371 * must handle nfsrv_opencheck() calls after any other access checks. 1372 */ 1373 void 1374 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1375 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1376 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1377 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1378 struct nfsexstuff *exp, struct vnode **vpp) 1379 { 1380 struct vnode *vp = NULL; 1381 u_quad_t tempsize; 1382 struct nfsexstuff nes; 1383 1384 if (ndp->ni_vp == NULL) 1385 nd->nd_repstat = nfsrv_opencheck(clientid, 1386 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1387 if (!nd->nd_repstat) { 1388 if (ndp->ni_vp == NULL) { 1389 vrele(ndp->ni_startdir); 1390 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1391 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1392 vput(ndp->ni_dvp); 1393 nfsvno_relpathbuf(ndp); 1394 if (!nd->nd_repstat) { 1395 if (*exclusive_flagp) { 1396 *exclusive_flagp = 0; 1397 NFSVNO_ATTRINIT(nvap); 1398 nvap->na_atime.tv_sec = cverf[0]; 1399 nvap->na_atime.tv_nsec = cverf[1]; 1400 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1401 &nvap->na_vattr, cred); 1402 } else { 1403 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1404 aclp, p, attrbitp, exp); 1405 } 1406 } 1407 vp = ndp->ni_vp; 1408 } else { 1409 if (ndp->ni_startdir) 1410 vrele(ndp->ni_startdir); 1411 nfsvno_relpathbuf(ndp); 1412 vp = ndp->ni_vp; 1413 if (create == NFSV4OPEN_CREATE) { 1414 if (ndp->ni_dvp == vp) 1415 vrele(ndp->ni_dvp); 1416 else 1417 vput(ndp->ni_dvp); 1418 } 1419 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1420 if (ndp->ni_cnd.cn_flags & RDONLY) 1421 NFSVNO_SETEXRDONLY(&nes); 1422 else 1423 NFSVNO_EXINIT(&nes); 1424 nd->nd_repstat = nfsvno_accchk(vp, 1425 VWRITE, cred, &nes, p, 1426 NFSACCCHK_NOOVERRIDE, 1427 NFSACCCHK_VPISLOCKED, NULL); 1428 nd->nd_repstat = nfsrv_opencheck(clientid, 1429 stateidp, stp, vp, nd, p, nd->nd_repstat); 1430 if (!nd->nd_repstat) { 1431 tempsize = nvap->na_size; 1432 NFSVNO_ATTRINIT(nvap); 1433 nvap->na_size = tempsize; 1434 nd->nd_repstat = VOP_SETATTR(vp, 1435 &nvap->na_vattr, cred); 1436 } 1437 } else if (vp->v_type == VREG) { 1438 nd->nd_repstat = nfsrv_opencheck(clientid, 1439 stateidp, stp, vp, nd, p, nd->nd_repstat); 1440 } 1441 } 1442 } else { 1443 if (ndp->ni_cnd.cn_flags & HASBUF) 1444 nfsvno_relpathbuf(ndp); 1445 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1446 vrele(ndp->ni_startdir); 1447 if (ndp->ni_dvp == ndp->ni_vp) 1448 vrele(ndp->ni_dvp); 1449 else 1450 vput(ndp->ni_dvp); 1451 if (ndp->ni_vp) 1452 vput(ndp->ni_vp); 1453 } 1454 } 1455 *vpp = vp; 1456 1457 NFSEXITCODE2(0, nd); 1458 } 1459 1460 /* 1461 * Updates the file rev and sets the mtime and ctime 1462 * to the current clock time, returning the va_filerev and va_Xtime 1463 * values. 1464 */ 1465 void 1466 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1467 struct ucred *cred, struct thread *p) 1468 { 1469 struct vattr va; 1470 1471 VATTR_NULL(&va); 1472 getnanotime(&va.va_mtime); 1473 (void) VOP_SETATTR(vp, &va, cred); 1474 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1475 } 1476 1477 /* 1478 * Glue routine to nfsv4_fillattr(). 1479 */ 1480 int 1481 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1482 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1483 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1484 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1485 { 1486 int error; 1487 1488 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1489 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1490 mounted_on_fileno); 1491 NFSEXITCODE2(0, nd); 1492 return (error); 1493 } 1494 1495 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1496 /* 1497 * nfs readdir service 1498 * - mallocs what it thinks is enough to read 1499 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1500 * - calls VOP_READDIR() 1501 * - loops around building the reply 1502 * if the output generated exceeds count break out of loop 1503 * The NFSM_CLGET macro is used here so that the reply will be packed 1504 * tightly in mbuf clusters. 1505 * - it trims out records with d_fileno == 0 1506 * this doesn't matter for Unix clients, but they might confuse clients 1507 * for other os'. 1508 * - it trims out records with d_type == DT_WHT 1509 * these cannot be seen through NFS (unless we extend the protocol) 1510 * The alternate call nfsrvd_readdirplus() does lookups as well. 1511 * PS: The NFS protocol spec. does not clarify what the "count" byte 1512 * argument is a count of.. just name strings and file id's or the 1513 * entire reply rpc or ... 1514 * I tried just file name and id sizes and it confused the Sun client, 1515 * so I am using the full rpc size now. The "paranoia.." comment refers 1516 * to including the status longwords that are not a part of the dir. 1517 * "entry" structures, but are in the rpc. 1518 */ 1519 int 1520 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1521 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1522 { 1523 struct dirent *dp; 1524 u_int32_t *tl; 1525 int dirlen; 1526 char *cpos, *cend, *rbuf; 1527 struct nfsvattr at; 1528 int nlen, error = 0, getret = 1; 1529 int siz, cnt, fullsiz, eofflag, ncookies; 1530 u_int64_t off, toff, verf; 1531 u_long *cookies = NULL, *cookiep; 1532 struct uio io; 1533 struct iovec iv; 1534 int not_zfs; 1535 1536 if (nd->nd_repstat) { 1537 nfsrv_postopattr(nd, getret, &at); 1538 goto out; 1539 } 1540 if (nd->nd_flag & ND_NFSV2) { 1541 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1542 off = fxdr_unsigned(u_quad_t, *tl++); 1543 } else { 1544 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1545 off = fxdr_hyper(tl); 1546 tl += 2; 1547 verf = fxdr_hyper(tl); 1548 tl += 2; 1549 } 1550 toff = off; 1551 cnt = fxdr_unsigned(int, *tl); 1552 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1553 cnt = NFS_SRVMAXDATA(nd); 1554 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1555 fullsiz = siz; 1556 if (nd->nd_flag & ND_NFSV3) { 1557 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1558 p, 1); 1559 #if 0 1560 /* 1561 * va_filerev is not sufficient as a cookie verifier, 1562 * since it is not supposed to change when entries are 1563 * removed/added unless that offset cookies returned to 1564 * the client are no longer valid. 1565 */ 1566 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1567 nd->nd_repstat = NFSERR_BAD_COOKIE; 1568 #endif 1569 } 1570 if (nd->nd_repstat == 0 && cnt == 0) { 1571 if (nd->nd_flag & ND_NFSV2) 1572 /* NFSv2 does not have NFSERR_TOOSMALL */ 1573 nd->nd_repstat = EPERM; 1574 else 1575 nd->nd_repstat = NFSERR_TOOSMALL; 1576 } 1577 if (!nd->nd_repstat) 1578 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1579 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1580 NFSACCCHK_VPISLOCKED, NULL); 1581 if (nd->nd_repstat) { 1582 vput(vp); 1583 if (nd->nd_flag & ND_NFSV3) 1584 nfsrv_postopattr(nd, getret, &at); 1585 goto out; 1586 } 1587 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1588 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1589 again: 1590 eofflag = 0; 1591 if (cookies) { 1592 free((caddr_t)cookies, M_TEMP); 1593 cookies = NULL; 1594 } 1595 1596 iv.iov_base = rbuf; 1597 iv.iov_len = siz; 1598 io.uio_iov = &iv; 1599 io.uio_iovcnt = 1; 1600 io.uio_offset = (off_t)off; 1601 io.uio_resid = siz; 1602 io.uio_segflg = UIO_SYSSPACE; 1603 io.uio_rw = UIO_READ; 1604 io.uio_td = NULL; 1605 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1606 &cookies); 1607 off = (u_int64_t)io.uio_offset; 1608 if (io.uio_resid) 1609 siz -= io.uio_resid; 1610 1611 if (!cookies && !nd->nd_repstat) 1612 nd->nd_repstat = NFSERR_PERM; 1613 if (nd->nd_flag & ND_NFSV3) { 1614 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1615 if (!nd->nd_repstat) 1616 nd->nd_repstat = getret; 1617 } 1618 1619 /* 1620 * Handles the failed cases. nd->nd_repstat == 0 past here. 1621 */ 1622 if (nd->nd_repstat) { 1623 vput(vp); 1624 free((caddr_t)rbuf, M_TEMP); 1625 if (cookies) 1626 free((caddr_t)cookies, M_TEMP); 1627 if (nd->nd_flag & ND_NFSV3) 1628 nfsrv_postopattr(nd, getret, &at); 1629 goto out; 1630 } 1631 /* 1632 * If nothing read, return eof 1633 * rpc reply 1634 */ 1635 if (siz == 0) { 1636 vput(vp); 1637 if (nd->nd_flag & ND_NFSV2) { 1638 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1639 } else { 1640 nfsrv_postopattr(nd, getret, &at); 1641 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1642 txdr_hyper(at.na_filerev, tl); 1643 tl += 2; 1644 } 1645 *tl++ = newnfs_false; 1646 *tl = newnfs_true; 1647 FREE((caddr_t)rbuf, M_TEMP); 1648 FREE((caddr_t)cookies, M_TEMP); 1649 goto out; 1650 } 1651 1652 /* 1653 * Check for degenerate cases of nothing useful read. 1654 * If so go try again 1655 */ 1656 cpos = rbuf; 1657 cend = rbuf + siz; 1658 dp = (struct dirent *)cpos; 1659 cookiep = cookies; 1660 1661 /* 1662 * For some reason FreeBSD's ufs_readdir() chooses to back the 1663 * directory offset up to a block boundary, so it is necessary to 1664 * skip over the records that precede the requested offset. This 1665 * requires the assumption that file offset cookies monotonically 1666 * increase. 1667 * Since the offset cookies don't monotonically increase for ZFS, 1668 * this is not done when ZFS is the file system. 1669 */ 1670 while (cpos < cend && ncookies > 0 && 1671 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1672 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) { 1673 cpos += dp->d_reclen; 1674 dp = (struct dirent *)cpos; 1675 cookiep++; 1676 ncookies--; 1677 } 1678 if (cpos >= cend || ncookies == 0) { 1679 siz = fullsiz; 1680 toff = off; 1681 goto again; 1682 } 1683 vput(vp); 1684 1685 /* 1686 * dirlen is the size of the reply, including all XDR and must 1687 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1688 * if the XDR should be included in "count", but to be safe, we do. 1689 * (Include the two booleans at the end of the reply in dirlen now.) 1690 */ 1691 if (nd->nd_flag & ND_NFSV3) { 1692 nfsrv_postopattr(nd, getret, &at); 1693 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1694 txdr_hyper(at.na_filerev, tl); 1695 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1696 } else { 1697 dirlen = 2 * NFSX_UNSIGNED; 1698 } 1699 1700 /* Loop through the records and build reply */ 1701 while (cpos < cend && ncookies > 0) { 1702 nlen = dp->d_namlen; 1703 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1704 nlen <= NFS_MAXNAMLEN) { 1705 if (nd->nd_flag & ND_NFSV3) 1706 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1707 else 1708 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1709 if (dirlen > cnt) { 1710 eofflag = 0; 1711 break; 1712 } 1713 1714 /* 1715 * Build the directory record xdr from 1716 * the dirent entry. 1717 */ 1718 if (nd->nd_flag & ND_NFSV3) { 1719 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1720 *tl++ = newnfs_true; 1721 *tl++ = 0; 1722 } else { 1723 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1724 *tl++ = newnfs_true; 1725 } 1726 *tl = txdr_unsigned(dp->d_fileno); 1727 (void) nfsm_strtom(nd, dp->d_name, nlen); 1728 if (nd->nd_flag & ND_NFSV3) { 1729 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1730 *tl++ = 0; 1731 } else 1732 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1733 *tl = txdr_unsigned(*cookiep); 1734 } 1735 cpos += dp->d_reclen; 1736 dp = (struct dirent *)cpos; 1737 cookiep++; 1738 ncookies--; 1739 } 1740 if (cpos < cend) 1741 eofflag = 0; 1742 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1743 *tl++ = newnfs_false; 1744 if (eofflag) 1745 *tl = newnfs_true; 1746 else 1747 *tl = newnfs_false; 1748 FREE((caddr_t)rbuf, M_TEMP); 1749 FREE((caddr_t)cookies, M_TEMP); 1750 1751 out: 1752 NFSEXITCODE2(0, nd); 1753 return (0); 1754 nfsmout: 1755 vput(vp); 1756 NFSEXITCODE2(error, nd); 1757 return (error); 1758 } 1759 1760 /* 1761 * Readdirplus for V3 and Readdir for V4. 1762 */ 1763 int 1764 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1765 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1766 { 1767 struct dirent *dp; 1768 u_int32_t *tl; 1769 int dirlen; 1770 char *cpos, *cend, *rbuf; 1771 struct vnode *nvp; 1772 fhandle_t nfh; 1773 struct nfsvattr nva, at, *nvap = &nva; 1774 struct mbuf *mb0, *mb1; 1775 struct nfsreferral *refp; 1776 int nlen, r, error = 0, getret = 1, usevget = 1; 1777 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1778 caddr_t bpos0, bpos1; 1779 u_int64_t off, toff, verf; 1780 u_long *cookies = NULL, *cookiep; 1781 nfsattrbit_t attrbits, rderrbits, savbits; 1782 struct uio io; 1783 struct iovec iv; 1784 struct componentname cn; 1785 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls; 1786 struct mount *mp, *new_mp; 1787 uint64_t mounted_on_fileno; 1788 1789 if (nd->nd_repstat) { 1790 nfsrv_postopattr(nd, getret, &at); 1791 goto out; 1792 } 1793 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1794 off = fxdr_hyper(tl); 1795 toff = off; 1796 tl += 2; 1797 verf = fxdr_hyper(tl); 1798 tl += 2; 1799 siz = fxdr_unsigned(int, *tl++); 1800 cnt = fxdr_unsigned(int, *tl); 1801 1802 /* 1803 * Use the server's maximum data transfer size as the upper bound 1804 * on reply datalen. 1805 */ 1806 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1807 cnt = NFS_SRVMAXDATA(nd); 1808 1809 /* 1810 * siz is a "hint" of how much directory information (name, fileid, 1811 * cookie) should be in the reply. At least one client "hints" 0, 1812 * so I set it to cnt for that case. I also round it up to the 1813 * next multiple of DIRBLKSIZ. 1814 */ 1815 if (siz <= 0) 1816 siz = cnt; 1817 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1818 1819 if (nd->nd_flag & ND_NFSV4) { 1820 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1821 if (error) 1822 goto nfsmout; 1823 NFSSET_ATTRBIT(&savbits, &attrbits); 1824 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1825 NFSZERO_ATTRBIT(&rderrbits); 1826 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1827 } else { 1828 NFSZERO_ATTRBIT(&attrbits); 1829 } 1830 fullsiz = siz; 1831 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1832 if (!nd->nd_repstat) { 1833 if (off && verf != at.na_filerev) { 1834 /* 1835 * va_filerev is not sufficient as a cookie verifier, 1836 * since it is not supposed to change when entries are 1837 * removed/added unless that offset cookies returned to 1838 * the client are no longer valid. 1839 */ 1840 #if 0 1841 if (nd->nd_flag & ND_NFSV4) { 1842 nd->nd_repstat = NFSERR_NOTSAME; 1843 } else { 1844 nd->nd_repstat = NFSERR_BAD_COOKIE; 1845 } 1846 #endif 1847 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1848 nd->nd_repstat = NFSERR_BAD_COOKIE; 1849 } 1850 } 1851 if (!nd->nd_repstat && vp->v_type != VDIR) 1852 nd->nd_repstat = NFSERR_NOTDIR; 1853 if (!nd->nd_repstat && cnt == 0) 1854 nd->nd_repstat = NFSERR_TOOSMALL; 1855 if (!nd->nd_repstat) 1856 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1857 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1858 NFSACCCHK_VPISLOCKED, NULL); 1859 if (nd->nd_repstat) { 1860 vput(vp); 1861 if (nd->nd_flag & ND_NFSV3) 1862 nfsrv_postopattr(nd, getret, &at); 1863 goto out; 1864 } 1865 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1866 1867 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1868 again: 1869 eofflag = 0; 1870 if (cookies) { 1871 free((caddr_t)cookies, M_TEMP); 1872 cookies = NULL; 1873 } 1874 1875 iv.iov_base = rbuf; 1876 iv.iov_len = siz; 1877 io.uio_iov = &iv; 1878 io.uio_iovcnt = 1; 1879 io.uio_offset = (off_t)off; 1880 io.uio_resid = siz; 1881 io.uio_segflg = UIO_SYSSPACE; 1882 io.uio_rw = UIO_READ; 1883 io.uio_td = NULL; 1884 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1885 &cookies); 1886 off = (u_int64_t)io.uio_offset; 1887 if (io.uio_resid) 1888 siz -= io.uio_resid; 1889 1890 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1891 1892 if (!cookies && !nd->nd_repstat) 1893 nd->nd_repstat = NFSERR_PERM; 1894 if (!nd->nd_repstat) 1895 nd->nd_repstat = getret; 1896 if (nd->nd_repstat) { 1897 vput(vp); 1898 if (cookies) 1899 free((caddr_t)cookies, M_TEMP); 1900 free((caddr_t)rbuf, M_TEMP); 1901 if (nd->nd_flag & ND_NFSV3) 1902 nfsrv_postopattr(nd, getret, &at); 1903 goto out; 1904 } 1905 /* 1906 * If nothing read, return eof 1907 * rpc reply 1908 */ 1909 if (siz == 0) { 1910 vput(vp); 1911 if (nd->nd_flag & ND_NFSV3) 1912 nfsrv_postopattr(nd, getret, &at); 1913 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1914 txdr_hyper(at.na_filerev, tl); 1915 tl += 2; 1916 *tl++ = newnfs_false; 1917 *tl = newnfs_true; 1918 free((caddr_t)cookies, M_TEMP); 1919 free((caddr_t)rbuf, M_TEMP); 1920 goto out; 1921 } 1922 1923 /* 1924 * Check for degenerate cases of nothing useful read. 1925 * If so go try again 1926 */ 1927 cpos = rbuf; 1928 cend = rbuf + siz; 1929 dp = (struct dirent *)cpos; 1930 cookiep = cookies; 1931 1932 /* 1933 * For some reason FreeBSD's ufs_readdir() chooses to back the 1934 * directory offset up to a block boundary, so it is necessary to 1935 * skip over the records that precede the requested offset. This 1936 * requires the assumption that file offset cookies monotonically 1937 * increase. 1938 * Since the offset cookies don't monotonically increase for ZFS, 1939 * this is not done when ZFS is the file system. 1940 */ 1941 while (cpos < cend && ncookies > 0 && 1942 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1943 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) || 1944 ((nd->nd_flag & ND_NFSV4) && 1945 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1946 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1947 cpos += dp->d_reclen; 1948 dp = (struct dirent *)cpos; 1949 cookiep++; 1950 ncookies--; 1951 } 1952 if (cpos >= cend || ncookies == 0) { 1953 siz = fullsiz; 1954 toff = off; 1955 goto again; 1956 } 1957 1958 /* 1959 * Busy the file system so that the mount point won't go away 1960 * and, as such, VFS_VGET() can be used safely. 1961 */ 1962 mp = vp->v_mount; 1963 vfs_ref(mp); 1964 NFSVOPUNLOCK(vp, 0); 1965 nd->nd_repstat = vfs_busy(mp, 0); 1966 vfs_rel(mp); 1967 if (nd->nd_repstat != 0) { 1968 vrele(vp); 1969 free(cookies, M_TEMP); 1970 free(rbuf, M_TEMP); 1971 if (nd->nd_flag & ND_NFSV3) 1972 nfsrv_postopattr(nd, getret, &at); 1973 goto out; 1974 } 1975 1976 /* 1977 * Save this position, in case there is an error before one entry 1978 * is created. 1979 */ 1980 mb0 = nd->nd_mb; 1981 bpos0 = nd->nd_bpos; 1982 1983 /* 1984 * Fill in the first part of the reply. 1985 * dirlen is the reply length in bytes and cannot exceed cnt. 1986 * (Include the two booleans at the end of the reply in dirlen now, 1987 * so we recognize when we have exceeded cnt.) 1988 */ 1989 if (nd->nd_flag & ND_NFSV3) { 1990 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1991 nfsrv_postopattr(nd, getret, &at); 1992 } else { 1993 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 1994 } 1995 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 1996 txdr_hyper(at.na_filerev, tl); 1997 1998 /* 1999 * Save this position, in case there is an empty reply needed. 2000 */ 2001 mb1 = nd->nd_mb; 2002 bpos1 = nd->nd_bpos; 2003 2004 /* Loop through the records and build reply */ 2005 entrycnt = 0; 2006 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2007 nlen = dp->d_namlen; 2008 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2009 nlen <= NFS_MAXNAMLEN && 2010 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2011 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2012 || (nlen == 1 && dp->d_name[0] != '.'))) { 2013 /* 2014 * Save the current position in the reply, in case 2015 * this entry exceeds cnt. 2016 */ 2017 mb1 = nd->nd_mb; 2018 bpos1 = nd->nd_bpos; 2019 2020 /* 2021 * For readdir_and_lookup get the vnode using 2022 * the file number. 2023 */ 2024 nvp = NULL; 2025 refp = NULL; 2026 r = 0; 2027 at_root = 0; 2028 needs_unbusy = 0; 2029 new_mp = mp; 2030 mounted_on_fileno = (uint64_t)dp->d_fileno; 2031 if ((nd->nd_flag & ND_NFSV3) || 2032 NFSNONZERO_ATTRBIT(&savbits)) { 2033 if (nd->nd_flag & ND_NFSV4) 2034 refp = nfsv4root_getreferral(NULL, 2035 vp, dp->d_fileno); 2036 if (refp == NULL) { 2037 if (usevget) 2038 r = VFS_VGET(mp, dp->d_fileno, 2039 LK_SHARED, &nvp); 2040 else 2041 r = EOPNOTSUPP; 2042 if (r == EOPNOTSUPP) { 2043 if (usevget) { 2044 usevget = 0; 2045 cn.cn_nameiop = LOOKUP; 2046 cn.cn_lkflags = 2047 LK_SHARED | 2048 LK_RETRY; 2049 cn.cn_cred = 2050 nd->nd_cred; 2051 cn.cn_thread = p; 2052 } 2053 cn.cn_nameptr = dp->d_name; 2054 cn.cn_namelen = nlen; 2055 cn.cn_flags = ISLASTCN | 2056 NOFOLLOW | LOCKLEAF | 2057 MPSAFE; 2058 if (nlen == 2 && 2059 dp->d_name[0] == '.' && 2060 dp->d_name[1] == '.') 2061 cn.cn_flags |= 2062 ISDOTDOT; 2063 if (NFSVOPLOCK(vp, LK_SHARED) 2064 != 0) { 2065 nd->nd_repstat = EPERM; 2066 break; 2067 } 2068 if ((vp->v_vflag & VV_ROOT) != 0 2069 && (cn.cn_flags & ISDOTDOT) 2070 != 0) { 2071 vref(vp); 2072 nvp = vp; 2073 r = 0; 2074 } else { 2075 r = VOP_LOOKUP(vp, &nvp, 2076 &cn); 2077 if (vp != nvp) 2078 NFSVOPUNLOCK(vp, 2079 0); 2080 } 2081 } 2082 2083 /* 2084 * For NFSv4, check to see if nvp is 2085 * a mount point and get the mount 2086 * point vnode, as required. 2087 */ 2088 if (r == 0 && 2089 nfsrv_enable_crossmntpt != 0 && 2090 (nd->nd_flag & ND_NFSV4) != 0 && 2091 nvp->v_type == VDIR && 2092 nvp->v_mountedhere != NULL) { 2093 new_mp = nvp->v_mountedhere; 2094 r = vfs_busy(new_mp, 0); 2095 vput(nvp); 2096 nvp = NULL; 2097 if (r == 0) { 2098 r = VFS_ROOT(new_mp, 2099 LK_SHARED, &nvp); 2100 needs_unbusy = 1; 2101 if (r == 0) 2102 at_root = 1; 2103 } 2104 } 2105 } 2106 if (!r) { 2107 if (refp == NULL && 2108 ((nd->nd_flag & ND_NFSV3) || 2109 NFSNONZERO_ATTRBIT(&attrbits))) { 2110 r = nfsvno_getfh(nvp, &nfh, p); 2111 if (!r) 2112 r = nfsvno_getattr(nvp, nvap, 2113 nd->nd_cred, p, 1); 2114 } 2115 } else { 2116 nvp = NULL; 2117 } 2118 if (r) { 2119 if (!NFSISSET_ATTRBIT(&attrbits, 2120 NFSATTRBIT_RDATTRERROR)) { 2121 if (nvp != NULL) 2122 vput(nvp); 2123 if (needs_unbusy != 0) 2124 vfs_unbusy(new_mp); 2125 nd->nd_repstat = r; 2126 break; 2127 } 2128 } 2129 } 2130 2131 /* 2132 * Build the directory record xdr 2133 */ 2134 if (nd->nd_flag & ND_NFSV3) { 2135 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2136 *tl++ = newnfs_true; 2137 *tl++ = 0; 2138 *tl = txdr_unsigned(dp->d_fileno); 2139 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2140 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2141 *tl++ = 0; 2142 *tl = txdr_unsigned(*cookiep); 2143 nfsrv_postopattr(nd, 0, nvap); 2144 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2145 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2146 if (nvp != NULL) 2147 vput(nvp); 2148 } else { 2149 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2150 *tl++ = newnfs_true; 2151 *tl++ = 0; 2152 *tl = txdr_unsigned(*cookiep); 2153 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2154 if (nvp != NULL) { 2155 supports_nfsv4acls = 2156 nfs_supportsnfsv4acls(nvp); 2157 NFSVOPUNLOCK(nvp, 0); 2158 } else 2159 supports_nfsv4acls = 0; 2160 if (refp != NULL) { 2161 dirlen += nfsrv_putreferralattr(nd, 2162 &savbits, refp, 0, 2163 &nd->nd_repstat); 2164 if (nd->nd_repstat) { 2165 if (nvp != NULL) 2166 vrele(nvp); 2167 if (needs_unbusy != 0) 2168 vfs_unbusy(new_mp); 2169 break; 2170 } 2171 } else if (r) { 2172 dirlen += nfsvno_fillattr(nd, new_mp, 2173 nvp, nvap, &nfh, r, &rderrbits, 2174 nd->nd_cred, p, isdgram, 0, 2175 supports_nfsv4acls, at_root, 2176 mounted_on_fileno); 2177 } else { 2178 dirlen += nfsvno_fillattr(nd, new_mp, 2179 nvp, nvap, &nfh, r, &attrbits, 2180 nd->nd_cred, p, isdgram, 0, 2181 supports_nfsv4acls, at_root, 2182 mounted_on_fileno); 2183 } 2184 if (nvp != NULL) 2185 vrele(nvp); 2186 dirlen += (3 * NFSX_UNSIGNED); 2187 } 2188 if (needs_unbusy != 0) 2189 vfs_unbusy(new_mp); 2190 if (dirlen <= cnt) 2191 entrycnt++; 2192 } 2193 cpos += dp->d_reclen; 2194 dp = (struct dirent *)cpos; 2195 cookiep++; 2196 ncookies--; 2197 } 2198 vrele(vp); 2199 vfs_unbusy(mp); 2200 2201 /* 2202 * If dirlen > cnt, we must strip off the last entry. If that 2203 * results in an empty reply, report NFSERR_TOOSMALL. 2204 */ 2205 if (dirlen > cnt || nd->nd_repstat) { 2206 if (!nd->nd_repstat && entrycnt == 0) 2207 nd->nd_repstat = NFSERR_TOOSMALL; 2208 if (nd->nd_repstat) 2209 newnfs_trimtrailing(nd, mb0, bpos0); 2210 else 2211 newnfs_trimtrailing(nd, mb1, bpos1); 2212 eofflag = 0; 2213 } else if (cpos < cend) 2214 eofflag = 0; 2215 if (!nd->nd_repstat) { 2216 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2217 *tl++ = newnfs_false; 2218 if (eofflag) 2219 *tl = newnfs_true; 2220 else 2221 *tl = newnfs_false; 2222 } 2223 FREE((caddr_t)cookies, M_TEMP); 2224 FREE((caddr_t)rbuf, M_TEMP); 2225 2226 out: 2227 NFSEXITCODE2(0, nd); 2228 return (0); 2229 nfsmout: 2230 vput(vp); 2231 NFSEXITCODE2(error, nd); 2232 return (error); 2233 } 2234 2235 /* 2236 * Get the settable attributes out of the mbuf list. 2237 * (Return 0 or EBADRPC) 2238 */ 2239 int 2240 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2241 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2242 { 2243 u_int32_t *tl; 2244 struct nfsv2_sattr *sp; 2245 struct timeval curtime; 2246 int error = 0, toclient = 0; 2247 2248 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2249 case ND_NFSV2: 2250 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2251 /* 2252 * Some old clients didn't fill in the high order 16bits. 2253 * --> check the low order 2 bytes for 0xffff 2254 */ 2255 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2256 nvap->na_mode = nfstov_mode(sp->sa_mode); 2257 if (sp->sa_uid != newnfs_xdrneg1) 2258 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2259 if (sp->sa_gid != newnfs_xdrneg1) 2260 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2261 if (sp->sa_size != newnfs_xdrneg1) 2262 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2263 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2264 #ifdef notyet 2265 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2266 #else 2267 nvap->na_atime.tv_sec = 2268 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2269 nvap->na_atime.tv_nsec = 0; 2270 #endif 2271 } 2272 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2273 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2274 break; 2275 case ND_NFSV3: 2276 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2277 if (*tl == newnfs_true) { 2278 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2279 nvap->na_mode = nfstov_mode(*tl); 2280 } 2281 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2282 if (*tl == newnfs_true) { 2283 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2284 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2285 } 2286 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2287 if (*tl == newnfs_true) { 2288 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2289 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2290 } 2291 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2292 if (*tl == newnfs_true) { 2293 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2294 nvap->na_size = fxdr_hyper(tl); 2295 } 2296 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2297 switch (fxdr_unsigned(int, *tl)) { 2298 case NFSV3SATTRTIME_TOCLIENT: 2299 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2300 fxdr_nfsv3time(tl, &nvap->na_atime); 2301 toclient = 1; 2302 break; 2303 case NFSV3SATTRTIME_TOSERVER: 2304 NFSGETTIME(&curtime); 2305 nvap->na_atime.tv_sec = curtime.tv_sec; 2306 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000; 2307 nvap->na_vaflags |= VA_UTIMES_NULL; 2308 break; 2309 }; 2310 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2311 switch (fxdr_unsigned(int, *tl)) { 2312 case NFSV3SATTRTIME_TOCLIENT: 2313 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2314 fxdr_nfsv3time(tl, &nvap->na_mtime); 2315 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2316 break; 2317 case NFSV3SATTRTIME_TOSERVER: 2318 NFSGETTIME(&curtime); 2319 nvap->na_mtime.tv_sec = curtime.tv_sec; 2320 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000; 2321 if (!toclient) 2322 nvap->na_vaflags |= VA_UTIMES_NULL; 2323 break; 2324 }; 2325 break; 2326 case ND_NFSV4: 2327 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2328 }; 2329 nfsmout: 2330 NFSEXITCODE2(error, nd); 2331 return (error); 2332 } 2333 2334 /* 2335 * Handle the setable attributes for V4. 2336 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2337 */ 2338 int 2339 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2340 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2341 { 2342 u_int32_t *tl; 2343 int attrsum = 0; 2344 int i, j; 2345 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2346 int toclient = 0; 2347 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2348 uid_t uid; 2349 gid_t gid; 2350 struct timeval curtime; 2351 2352 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2353 if (error) 2354 goto nfsmout; 2355 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2356 attrsize = fxdr_unsigned(int, *tl); 2357 2358 /* 2359 * Loop around getting the setable attributes. If an unsupported 2360 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2361 */ 2362 if (retnotsup) { 2363 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2364 bitpos = NFSATTRBIT_MAX; 2365 } else { 2366 bitpos = 0; 2367 } 2368 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2369 if (attrsum > attrsize) { 2370 error = NFSERR_BADXDR; 2371 goto nfsmout; 2372 } 2373 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2374 switch (bitpos) { 2375 case NFSATTRBIT_SIZE: 2376 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2377 nvap->na_size = fxdr_hyper(tl); 2378 attrsum += NFSX_HYPER; 2379 break; 2380 case NFSATTRBIT_ACL: 2381 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2382 p); 2383 if (error) 2384 goto nfsmout; 2385 if (aceerr && !nd->nd_repstat) 2386 nd->nd_repstat = aceerr; 2387 attrsum += aclsize; 2388 break; 2389 case NFSATTRBIT_ARCHIVE: 2390 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2391 if (!nd->nd_repstat) 2392 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2393 attrsum += NFSX_UNSIGNED; 2394 break; 2395 case NFSATTRBIT_HIDDEN: 2396 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2397 if (!nd->nd_repstat) 2398 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2399 attrsum += NFSX_UNSIGNED; 2400 break; 2401 case NFSATTRBIT_MIMETYPE: 2402 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2403 i = fxdr_unsigned(int, *tl); 2404 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2405 if (error) 2406 goto nfsmout; 2407 if (!nd->nd_repstat) 2408 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2409 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2410 break; 2411 case NFSATTRBIT_MODE: 2412 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2413 nvap->na_mode = nfstov_mode(*tl); 2414 attrsum += NFSX_UNSIGNED; 2415 break; 2416 case NFSATTRBIT_OWNER: 2417 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2418 j = fxdr_unsigned(int, *tl); 2419 if (j < 0) { 2420 error = NFSERR_BADXDR; 2421 goto nfsmout; 2422 } 2423 if (j > NFSV4_SMALLSTR) 2424 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2425 else 2426 cp = namestr; 2427 error = nfsrv_mtostr(nd, cp, j); 2428 if (error) { 2429 if (j > NFSV4_SMALLSTR) 2430 free(cp, M_NFSSTRING); 2431 goto nfsmout; 2432 } 2433 if (!nd->nd_repstat) { 2434 nd->nd_repstat = nfsv4_strtouid(cp,j,&uid,p); 2435 if (!nd->nd_repstat) 2436 nvap->na_uid = uid; 2437 } 2438 if (j > NFSV4_SMALLSTR) 2439 free(cp, M_NFSSTRING); 2440 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2441 break; 2442 case NFSATTRBIT_OWNERGROUP: 2443 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2444 j = fxdr_unsigned(int, *tl); 2445 if (j < 0) { 2446 error = NFSERR_BADXDR; 2447 goto nfsmout; 2448 } 2449 if (j > NFSV4_SMALLSTR) 2450 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2451 else 2452 cp = namestr; 2453 error = nfsrv_mtostr(nd, cp, j); 2454 if (error) { 2455 if (j > NFSV4_SMALLSTR) 2456 free(cp, M_NFSSTRING); 2457 goto nfsmout; 2458 } 2459 if (!nd->nd_repstat) { 2460 nd->nd_repstat = nfsv4_strtogid(cp,j,&gid,p); 2461 if (!nd->nd_repstat) 2462 nvap->na_gid = gid; 2463 } 2464 if (j > NFSV4_SMALLSTR) 2465 free(cp, M_NFSSTRING); 2466 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2467 break; 2468 case NFSATTRBIT_SYSTEM: 2469 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2470 if (!nd->nd_repstat) 2471 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2472 attrsum += NFSX_UNSIGNED; 2473 break; 2474 case NFSATTRBIT_TIMEACCESSSET: 2475 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2476 attrsum += NFSX_UNSIGNED; 2477 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2478 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2479 fxdr_nfsv4time(tl, &nvap->na_atime); 2480 toclient = 1; 2481 attrsum += NFSX_V4TIME; 2482 } else { 2483 NFSGETTIME(&curtime); 2484 nvap->na_atime.tv_sec = curtime.tv_sec; 2485 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000; 2486 nvap->na_vaflags |= VA_UTIMES_NULL; 2487 } 2488 break; 2489 case NFSATTRBIT_TIMEBACKUP: 2490 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2491 if (!nd->nd_repstat) 2492 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2493 attrsum += NFSX_V4TIME; 2494 break; 2495 case NFSATTRBIT_TIMECREATE: 2496 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2497 if (!nd->nd_repstat) 2498 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2499 attrsum += NFSX_V4TIME; 2500 break; 2501 case NFSATTRBIT_TIMEMODIFYSET: 2502 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2503 attrsum += NFSX_UNSIGNED; 2504 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2505 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2506 fxdr_nfsv4time(tl, &nvap->na_mtime); 2507 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2508 attrsum += NFSX_V4TIME; 2509 } else { 2510 NFSGETTIME(&curtime); 2511 nvap->na_mtime.tv_sec = curtime.tv_sec; 2512 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000; 2513 if (!toclient) 2514 nvap->na_vaflags |= VA_UTIMES_NULL; 2515 } 2516 break; 2517 default: 2518 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2519 /* 2520 * set bitpos so we drop out of the loop. 2521 */ 2522 bitpos = NFSATTRBIT_MAX; 2523 break; 2524 }; 2525 } 2526 2527 /* 2528 * some clients pad the attrlist, so we need to skip over the 2529 * padding. 2530 */ 2531 if (attrsum > attrsize) { 2532 error = NFSERR_BADXDR; 2533 } else { 2534 attrsize = NFSM_RNDUP(attrsize); 2535 if (attrsum < attrsize) 2536 error = nfsm_advance(nd, attrsize - attrsum, -1); 2537 } 2538 nfsmout: 2539 NFSEXITCODE2(error, nd); 2540 return (error); 2541 } 2542 2543 /* 2544 * Check/setup export credentials. 2545 */ 2546 int 2547 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2548 struct ucred *credanon) 2549 { 2550 int error = 0; 2551 2552 /* 2553 * Check/setup credentials. 2554 */ 2555 if (nd->nd_flag & ND_GSS) 2556 exp->nes_exflag &= ~MNT_EXPORTANON; 2557 2558 /* 2559 * Check to see if the operation is allowed for this security flavor. 2560 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2561 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2562 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2563 */ 2564 if (nfsvno_testexp(nd, exp) && 2565 nd->nd_procnum != NFSV4OP_SECINFO && 2566 nd->nd_procnum != NFSPROC_FSINFO) { 2567 if (nd->nd_flag & ND_NFSV4) 2568 error = NFSERR_WRONGSEC; 2569 else 2570 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2571 goto out; 2572 } 2573 2574 /* 2575 * Check to see if the file system is exported V4 only. 2576 */ 2577 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2578 error = NFSERR_PROGNOTV4; 2579 goto out; 2580 } 2581 2582 /* 2583 * Now, map the user credentials. 2584 * (Note that ND_AUTHNONE will only be set for an NFSv3 2585 * Fsinfo RPC. If set for anything else, this code might need 2586 * to change.) 2587 */ 2588 if (NFSVNO_EXPORTED(exp) && 2589 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) || 2590 NFSVNO_EXPORTANON(exp) || 2591 (nd->nd_flag & ND_AUTHNONE))) { 2592 nd->nd_cred->cr_uid = credanon->cr_uid; 2593 nd->nd_cred->cr_gid = credanon->cr_gid; 2594 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2595 credanon->cr_groups); 2596 } 2597 2598 out: 2599 NFSEXITCODE2(error, nd); 2600 return (error); 2601 } 2602 2603 /* 2604 * Check exports. 2605 */ 2606 int 2607 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2608 struct ucred **credp) 2609 { 2610 int i, error, *secflavors; 2611 2612 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2613 &exp->nes_numsecflavor, &secflavors); 2614 if (error) { 2615 if (nfs_rootfhset) { 2616 exp->nes_exflag = 0; 2617 exp->nes_numsecflavor = 0; 2618 error = 0; 2619 } 2620 } else { 2621 /* Copy the security flavors. */ 2622 for (i = 0; i < exp->nes_numsecflavor; i++) 2623 exp->nes_secflavors[i] = secflavors[i]; 2624 } 2625 NFSEXITCODE(error); 2626 return (error); 2627 } 2628 2629 /* 2630 * Get a vnode for a file handle and export stuff. 2631 */ 2632 int 2633 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2634 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2635 struct ucred **credp) 2636 { 2637 int i, error, *secflavors; 2638 2639 *credp = NULL; 2640 exp->nes_numsecflavor = 0; 2641 if (VFS_NEEDSGIANT(mp)) 2642 error = ESTALE; 2643 else 2644 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2645 if (error != 0) 2646 /* Make sure the server replies ESTALE to the client. */ 2647 error = ESTALE; 2648 if (nam && !error) { 2649 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2650 &exp->nes_numsecflavor, &secflavors); 2651 if (error) { 2652 if (nfs_rootfhset) { 2653 exp->nes_exflag = 0; 2654 exp->nes_numsecflavor = 0; 2655 error = 0; 2656 } else { 2657 vput(*vpp); 2658 } 2659 } else { 2660 /* Copy the security flavors. */ 2661 for (i = 0; i < exp->nes_numsecflavor; i++) 2662 exp->nes_secflavors[i] = secflavors[i]; 2663 } 2664 } 2665 NFSEXITCODE(error); 2666 return (error); 2667 } 2668 2669 /* 2670 * nfsd_fhtovp() - convert a fh to a vnode ptr 2671 * - look up fsid in mount list (if not found ret error) 2672 * - get vp and export rights by calling nfsvno_fhtovp() 2673 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2674 * for AUTH_SYS 2675 * - if mpp != NULL, return the mount point so that it can 2676 * be used for vn_finished_write() by the caller 2677 */ 2678 void 2679 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2680 struct vnode **vpp, struct nfsexstuff *exp, 2681 struct mount **mpp, int startwrite, struct thread *p) 2682 { 2683 struct mount *mp; 2684 struct ucred *credanon; 2685 fhandle_t *fhp; 2686 2687 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2688 /* 2689 * Check for the special case of the nfsv4root_fh. 2690 */ 2691 mp = vfs_busyfs(&fhp->fh_fsid); 2692 if (mpp != NULL) 2693 *mpp = mp; 2694 if (mp == NULL) { 2695 *vpp = NULL; 2696 nd->nd_repstat = ESTALE; 2697 goto out; 2698 } 2699 2700 if (startwrite) 2701 vn_start_write(NULL, mpp, V_WAIT); 2702 2703 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2704 &credanon); 2705 vfs_unbusy(mp); 2706 2707 /* 2708 * For NFSv4 without a pseudo root fs, unexported file handles 2709 * can be returned, so that Lookup works everywhere. 2710 */ 2711 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2712 !(nd->nd_flag & ND_NFSV4)) { 2713 vput(*vpp); 2714 nd->nd_repstat = EACCES; 2715 } 2716 2717 /* 2718 * Personally, I've never seen any point in requiring a 2719 * reserved port#, since only in the rare case where the 2720 * clients are all boxes with secure system priviledges, 2721 * does it provide any enhanced security, but... some people 2722 * believe it to be useful and keep putting this code back in. 2723 * (There is also some "security checker" out there that 2724 * complains if the nfs server doesn't enforce this.) 2725 * However, note the following: 2726 * RFC3530 (NFSv4) specifies that a reserved port# not be 2727 * required. 2728 * RFC2623 recommends that, if a reserved port# is checked for, 2729 * that there be a way to turn that off--> ifdef'd. 2730 */ 2731 #ifdef NFS_REQRSVPORT 2732 if (!nd->nd_repstat) { 2733 struct sockaddr_in *saddr; 2734 struct sockaddr_in6 *saddr6; 2735 2736 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2737 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2738 if (!(nd->nd_flag & ND_NFSV4) && 2739 ((saddr->sin_family == AF_INET && 2740 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2741 (saddr6->sin6_family == AF_INET6 && 2742 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2743 vput(*vpp); 2744 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2745 } 2746 } 2747 #endif /* NFS_REQRSVPORT */ 2748 2749 /* 2750 * Check/setup credentials. 2751 */ 2752 if (!nd->nd_repstat) { 2753 nd->nd_saveduid = nd->nd_cred->cr_uid; 2754 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2755 if (nd->nd_repstat) 2756 vput(*vpp); 2757 } 2758 if (credanon != NULL) 2759 crfree(credanon); 2760 if (nd->nd_repstat) { 2761 if (startwrite) 2762 vn_finished_write(mp); 2763 *vpp = NULL; 2764 if (mpp != NULL) 2765 *mpp = NULL; 2766 } 2767 2768 out: 2769 NFSEXITCODE2(0, nd); 2770 } 2771 2772 /* 2773 * glue for fp. 2774 */ 2775 int 2776 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2777 { 2778 struct filedesc *fdp; 2779 struct file *fp; 2780 int error = 0; 2781 2782 fdp = p->td_proc->p_fd; 2783 if (fd >= fdp->fd_nfiles || 2784 (fp = fdp->fd_ofiles[fd]) == NULL) { 2785 error = EBADF; 2786 goto out; 2787 } 2788 *fpp = fp; 2789 2790 out: 2791 NFSEXITCODE(error); 2792 return (error); 2793 } 2794 2795 /* 2796 * Called from nfssvc() to update the exports list. Just call 2797 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2798 * in the mount list. 2799 */ 2800 int 2801 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2802 { 2803 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2804 int error = 0; 2805 struct nameidata nd; 2806 fhandle_t fh; 2807 2808 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2809 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2810 nfs_rootfhset = 0; 2811 else if (error == 0) { 2812 if (nfsexargp->fspec == NULL) { 2813 error = EPERM; 2814 goto out; 2815 } 2816 /* 2817 * If fspec != NULL, this is the v4root path. 2818 */ 2819 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_USERSPACE, 2820 nfsexargp->fspec, p); 2821 if ((error = namei(&nd)) != 0) 2822 goto out; 2823 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2824 vrele(nd.ni_vp); 2825 if (!error) { 2826 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2827 NFSBCOPY((caddr_t)&fh, 2828 nfs_rootfh.nfsrvfh_data, 2829 sizeof (fhandle_t)); 2830 nfs_rootfhset = 1; 2831 } 2832 } 2833 2834 out: 2835 NFSEXITCODE(error); 2836 return (error); 2837 } 2838 2839 /* 2840 * Get the tcp socket sequence numbers we need. 2841 * (Maybe this should be moved to the tcp sources?) 2842 */ 2843 int 2844 nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap) 2845 { 2846 struct inpcb *inp; 2847 struct tcpcb *tp; 2848 int error = 0; 2849 2850 inp = sotoinpcb(so); 2851 KASSERT(inp != NULL, ("nfsrv_getsocksndseq: inp == NULL")); 2852 INP_RLOCK(inp); 2853 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 2854 INP_RUNLOCK(inp); 2855 error = EPIPE; 2856 goto out; 2857 } 2858 tp = intotcpcb(inp); 2859 if (tp->t_state != TCPS_ESTABLISHED) { 2860 INP_RUNLOCK(inp); 2861 error = EPIPE; 2862 goto out; 2863 } 2864 *maxp = tp->snd_max; 2865 *unap = tp->snd_una; 2866 INP_RUNLOCK(inp); 2867 2868 out: 2869 NFSEXITCODE(error); 2870 return (error); 2871 } 2872 2873 /* 2874 * This function needs to test to see if the system is near its limit 2875 * for memory allocation via malloc() or mget() and return True iff 2876 * either of these resources are near their limit. 2877 * XXX (For now, this is just a stub.) 2878 */ 2879 int nfsrv_testmalloclimit = 0; 2880 int 2881 nfsrv_mallocmget_limit(void) 2882 { 2883 static int printmesg = 0; 2884 static int testval = 1; 2885 2886 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2887 if ((printmesg++ % 100) == 0) 2888 printf("nfsd: malloc/mget near limit\n"); 2889 return (1); 2890 } 2891 return (0); 2892 } 2893 2894 /* 2895 * BSD specific initialization of a mount point. 2896 */ 2897 void 2898 nfsd_mntinit(void) 2899 { 2900 static int inited = 0; 2901 2902 if (inited) 2903 return; 2904 inited = 1; 2905 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2906 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2907 nfsv4root_mnt.mnt_export = NULL; 2908 TAILQ_INIT(&nfsv4root_opt); 2909 TAILQ_INIT(&nfsv4root_newopt); 2910 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2911 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2912 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2913 } 2914 2915 /* 2916 * Get a vnode for a file handle, without checking exports, etc. 2917 */ 2918 struct vnode * 2919 nfsvno_getvp(fhandle_t *fhp) 2920 { 2921 struct mount *mp; 2922 struct vnode *vp; 2923 int error; 2924 2925 mp = vfs_busyfs(&fhp->fh_fsid); 2926 if (mp == NULL) 2927 return (NULL); 2928 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2929 vfs_unbusy(mp); 2930 if (error) 2931 return (NULL); 2932 return (vp); 2933 } 2934 2935 /* 2936 * Do a local VOP_ADVLOCK(). 2937 */ 2938 int 2939 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2940 u_int64_t end, struct thread *td) 2941 { 2942 int error = 0; 2943 struct flock fl; 2944 u_int64_t tlen; 2945 2946 if (nfsrv_dolocallocks == 0) 2947 goto out; 2948 2949 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */ 2950 if ((vp->v_iflag & VI_DOOMED) != 0) { 2951 error = EPERM; 2952 goto out; 2953 } 2954 2955 fl.l_whence = SEEK_SET; 2956 fl.l_type = ftype; 2957 fl.l_start = (off_t)first; 2958 if (end == NFS64BITSSET) { 2959 fl.l_len = 0; 2960 } else { 2961 tlen = end - first; 2962 fl.l_len = (off_t)tlen; 2963 } 2964 /* 2965 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2966 * values for all calls, so that all locks will be held by the 2967 * nfsd server. (The nfsd server handles conflicts between the 2968 * various clients.) 2969 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2970 * bytes, so it can't be put in l_sysid. 2971 */ 2972 if (nfsv4_sysid == 0) 2973 nfsv4_sysid = nlm_acquire_next_sysid(); 2974 fl.l_pid = (pid_t)0; 2975 fl.l_sysid = (int)nfsv4_sysid; 2976 2977 NFSVOPUNLOCK(vp, 0); 2978 if (ftype == F_UNLCK) 2979 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 2980 (F_POSIX | F_REMOTE)); 2981 else 2982 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 2983 (F_POSIX | F_REMOTE)); 2984 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2985 2986 out: 2987 NFSEXITCODE(error); 2988 return (error); 2989 } 2990 2991 /* 2992 * Check the nfsv4 root exports. 2993 */ 2994 int 2995 nfsvno_v4rootexport(struct nfsrv_descript *nd) 2996 { 2997 struct ucred *credanon; 2998 int exflags, error = 0, numsecflavor, *secflavors, i; 2999 3000 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3001 &credanon, &numsecflavor, &secflavors); 3002 if (error) { 3003 error = NFSERR_PROGUNAVAIL; 3004 goto out; 3005 } 3006 if (credanon != NULL) 3007 crfree(credanon); 3008 for (i = 0; i < numsecflavor; i++) { 3009 if (secflavors[i] == AUTH_SYS) 3010 nd->nd_flag |= ND_EXAUTHSYS; 3011 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3012 nd->nd_flag |= ND_EXGSS; 3013 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3014 nd->nd_flag |= ND_EXGSSINTEGRITY; 3015 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3016 nd->nd_flag |= ND_EXGSSPRIVACY; 3017 } 3018 3019 out: 3020 NFSEXITCODE(error); 3021 return (error); 3022 } 3023 3024 /* 3025 * Nfs server psuedo system call for the nfsd's 3026 */ 3027 /* 3028 * MPSAFE 3029 */ 3030 static int 3031 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3032 { 3033 struct file *fp; 3034 struct nfsd_addsock_args sockarg; 3035 struct nfsd_nfsd_args nfsdarg; 3036 int error; 3037 3038 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3039 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3040 if (error) 3041 goto out; 3042 /* 3043 * Since we don't know what rights might be required, 3044 * pretend that we need them all. It is better to be too 3045 * careful than too reckless. 3046 */ 3047 if ((error = fget(td, sockarg.sock, CAP_SOCK_ALL, &fp)) != 0) 3048 goto out; 3049 if (fp->f_type != DTYPE_SOCKET) { 3050 fdrop(fp, td); 3051 error = EPERM; 3052 goto out; 3053 } 3054 error = nfsrvd_addsock(fp); 3055 fdrop(fp, td); 3056 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3057 if (uap->argp == NULL) { 3058 error = EINVAL; 3059 goto out; 3060 } 3061 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3062 sizeof (nfsdarg)); 3063 if (error) 3064 goto out; 3065 error = nfsrvd_nfsd(td, &nfsdarg); 3066 } else { 3067 error = nfssvc_srvcall(td, uap, td->td_ucred); 3068 } 3069 3070 out: 3071 NFSEXITCODE(error); 3072 return (error); 3073 } 3074 3075 static int 3076 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3077 { 3078 struct nfsex_args export; 3079 struct file *fp = NULL; 3080 int stablefd, len; 3081 struct nfsd_clid adminrevoke; 3082 struct nfsd_dumplist dumplist; 3083 struct nfsd_dumpclients *dumpclients; 3084 struct nfsd_dumplocklist dumplocklist; 3085 struct nfsd_dumplocks *dumplocks; 3086 struct nameidata nd; 3087 vnode_t vp; 3088 int error = EINVAL; 3089 struct proc *procp; 3090 3091 if (uap->flag & NFSSVC_PUBLICFH) { 3092 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3093 sizeof (fhandle_t)); 3094 error = copyin(uap->argp, 3095 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3096 if (!error) 3097 nfs_pubfhset = 1; 3098 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3099 error = copyin(uap->argp,(caddr_t)&export, 3100 sizeof (struct nfsex_args)); 3101 if (!error) 3102 error = nfsrv_v4rootexport(&export, cred, p); 3103 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3104 nfs_pubfhset = 0; 3105 error = 0; 3106 } else if (uap->flag & NFSSVC_STABLERESTART) { 3107 error = copyin(uap->argp, (caddr_t)&stablefd, 3108 sizeof (int)); 3109 if (!error) 3110 error = fp_getfvp(p, stablefd, &fp, &vp); 3111 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3112 error = EBADF; 3113 if (!error && newnfs_numnfsd != 0) 3114 error = EPERM; 3115 if (!error) { 3116 nfsrv_stablefirst.nsf_fp = fp; 3117 nfsrv_setupstable(p); 3118 } 3119 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3120 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3121 sizeof (struct nfsd_clid)); 3122 if (!error) 3123 error = nfsrv_adminrevoke(&adminrevoke, p); 3124 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3125 error = copyin(uap->argp, (caddr_t)&dumplist, 3126 sizeof (struct nfsd_dumplist)); 3127 if (!error && (dumplist.ndl_size < 1 || 3128 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3129 error = EPERM; 3130 if (!error) { 3131 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3132 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3133 M_TEMP, M_WAITOK); 3134 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3135 error = copyout(dumpclients, 3136 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3137 free((caddr_t)dumpclients, M_TEMP); 3138 } 3139 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3140 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3141 sizeof (struct nfsd_dumplocklist)); 3142 if (!error && (dumplocklist.ndllck_size < 1 || 3143 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3144 error = EPERM; 3145 if (!error) 3146 error = nfsrv_lookupfilename(&nd, 3147 dumplocklist.ndllck_fname, p); 3148 if (!error) { 3149 len = sizeof (struct nfsd_dumplocks) * 3150 dumplocklist.ndllck_size; 3151 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3152 M_TEMP, M_WAITOK); 3153 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3154 dumplocklist.ndllck_size, p); 3155 vput(nd.ni_vp); 3156 error = copyout(dumplocks, 3157 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3158 free((caddr_t)dumplocks, M_TEMP); 3159 } 3160 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3161 procp = p->td_proc; 3162 PROC_LOCK(procp); 3163 nfsd_master_pid = procp->p_pid; 3164 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3165 nfsd_master_start = procp->p_stats->p_start; 3166 nfsd_master_proc = procp; 3167 PROC_UNLOCK(procp); 3168 } 3169 3170 NFSEXITCODE(error); 3171 return (error); 3172 } 3173 3174 /* 3175 * Check exports. 3176 * Returns 0 if ok, 1 otherwise. 3177 */ 3178 int 3179 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3180 { 3181 int i; 3182 3183 /* 3184 * This seems odd, but allow the case where the security flavor 3185 * list is empty. This happens when NFSv4 is traversing non-exported 3186 * file systems. Exported file systems should always have a non-empty 3187 * security flavor list. 3188 */ 3189 if (exp->nes_numsecflavor == 0) 3190 return (0); 3191 3192 for (i = 0; i < exp->nes_numsecflavor; i++) { 3193 /* 3194 * The tests for privacy and integrity must be first, 3195 * since ND_GSS is set for everything but AUTH_SYS. 3196 */ 3197 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3198 (nd->nd_flag & ND_GSSPRIVACY)) 3199 return (0); 3200 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3201 (nd->nd_flag & ND_GSSINTEGRITY)) 3202 return (0); 3203 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3204 (nd->nd_flag & ND_GSS)) 3205 return (0); 3206 if (exp->nes_secflavors[i] == AUTH_SYS && 3207 (nd->nd_flag & ND_GSS) == 0) 3208 return (0); 3209 } 3210 return (1); 3211 } 3212 3213 /* 3214 * Calculate a hash value for the fid in a file handle. 3215 */ 3216 uint32_t 3217 nfsrv_hashfh(fhandle_t *fhp) 3218 { 3219 uint32_t hashval; 3220 3221 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3222 return (hashval); 3223 } 3224 3225 /* 3226 * Signal the userland master nfsd to backup the stable restart file. 3227 */ 3228 void 3229 nfsrv_backupstable(void) 3230 { 3231 struct proc *procp; 3232 3233 if (nfsd_master_proc != NULL) { 3234 procp = pfind(nfsd_master_pid); 3235 /* Try to make sure it is the correct process. */ 3236 if (procp == nfsd_master_proc && 3237 procp->p_stats->p_start.tv_sec == 3238 nfsd_master_start.tv_sec && 3239 procp->p_stats->p_start.tv_usec == 3240 nfsd_master_start.tv_usec && 3241 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3242 kern_psignal(procp, SIGUSR2); 3243 else 3244 nfsd_master_proc = NULL; 3245 3246 if (procp != NULL) 3247 PROC_UNLOCK(procp); 3248 } 3249 } 3250 3251 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3252 3253 /* 3254 * Called once to initialize data structures... 3255 */ 3256 static int 3257 nfsd_modevent(module_t mod, int type, void *data) 3258 { 3259 int error = 0; 3260 static int loaded = 0; 3261 3262 switch (type) { 3263 case MOD_LOAD: 3264 if (loaded) 3265 goto out; 3266 newnfs_portinit(); 3267 mtx_init(&nfs_cache_mutex, "nfs_cache_mutex", NULL, MTX_DEF); 3268 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF); 3269 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL, 3270 MTX_DEF); 3271 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3272 nfsrvd_initcache(); 3273 nfsd_init(); 3274 NFSD_LOCK(); 3275 nfsrvd_init(0); 3276 NFSD_UNLOCK(); 3277 nfsd_mntinit(); 3278 #ifdef VV_DISABLEDELEG 3279 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3280 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3281 #endif 3282 nfsd_call_servertimer = nfsrv_servertimer; 3283 nfsd_call_nfsd = nfssvc_nfsd; 3284 loaded = 1; 3285 break; 3286 3287 case MOD_UNLOAD: 3288 if (newnfs_numnfsd != 0) { 3289 error = EBUSY; 3290 break; 3291 } 3292 3293 #ifdef VV_DISABLEDELEG 3294 vn_deleg_ops.vndeleg_recall = NULL; 3295 vn_deleg_ops.vndeleg_disable = NULL; 3296 #endif 3297 nfsd_call_servertimer = NULL; 3298 nfsd_call_nfsd = NULL; 3299 3300 /* Clean out all NFSv4 state. */ 3301 nfsrv_throwawayallstate(curthread); 3302 3303 /* Clean the NFS server reply cache */ 3304 nfsrvd_cleancache(); 3305 3306 /* Free up the krpc server pool. */ 3307 if (nfsrvd_pool != NULL) 3308 svcpool_destroy(nfsrvd_pool); 3309 3310 /* and get rid of the locks */ 3311 mtx_destroy(&nfs_cache_mutex); 3312 mtx_destroy(&nfs_v4root_mutex); 3313 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3314 lockdestroy(&nfsv4root_mnt.mnt_explock); 3315 loaded = 0; 3316 break; 3317 default: 3318 error = EOPNOTSUPP; 3319 break; 3320 } 3321 3322 out: 3323 NFSEXITCODE(error); 3324 return (error); 3325 } 3326 static moduledata_t nfsd_mod = { 3327 "nfsd", 3328 nfsd_modevent, 3329 NULL, 3330 }; 3331 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3332 3333 /* So that loader and kldload(2) can find us, wherever we are.. */ 3334 MODULE_VERSION(nfsd, 1); 3335 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3336 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3337 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3338 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3339 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3340 3341