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 /* 1258 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1259 * file is done. At this time VOP_FSYNC does not accept offset and 1260 * byte count parameters so call VOP_FSYNC the whole file for now. 1261 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1262 */ 1263 if (cnt == 0 || cnt > MAX_COMMIT_COUNT) { 1264 /* 1265 * Give up and do the whole thing 1266 */ 1267 if (vp->v_object && 1268 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1269 VM_OBJECT_LOCK(vp->v_object); 1270 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1271 VM_OBJECT_UNLOCK(vp->v_object); 1272 } 1273 error = VOP_FSYNC(vp, MNT_WAIT, td); 1274 } else { 1275 /* 1276 * Locate and synchronously write any buffers that fall 1277 * into the requested range. Note: we are assuming that 1278 * f_iosize is a power of 2. 1279 */ 1280 int iosize = vp->v_mount->mnt_stat.f_iosize; 1281 int iomask = iosize - 1; 1282 struct bufobj *bo; 1283 daddr_t lblkno; 1284 1285 /* 1286 * Align to iosize boundry, super-align to page boundry. 1287 */ 1288 if (off & iomask) { 1289 cnt += off & iomask; 1290 off &= ~(u_quad_t)iomask; 1291 } 1292 if (off & PAGE_MASK) { 1293 cnt += off & PAGE_MASK; 1294 off &= ~(u_quad_t)PAGE_MASK; 1295 } 1296 lblkno = off / iosize; 1297 1298 if (vp->v_object && 1299 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1300 VM_OBJECT_LOCK(vp->v_object); 1301 vm_object_page_clean(vp->v_object, off, off + cnt, 1302 OBJPC_SYNC); 1303 VM_OBJECT_UNLOCK(vp->v_object); 1304 } 1305 1306 bo = &vp->v_bufobj; 1307 BO_LOCK(bo); 1308 while (cnt > 0) { 1309 struct buf *bp; 1310 1311 /* 1312 * If we have a buffer and it is marked B_DELWRI we 1313 * have to lock and write it. Otherwise the prior 1314 * write is assumed to have already been committed. 1315 * 1316 * gbincore() can return invalid buffers now so we 1317 * have to check that bit as well (though B_DELWRI 1318 * should not be set if B_INVAL is set there could be 1319 * a race here since we haven't locked the buffer). 1320 */ 1321 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1322 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1323 LK_INTERLOCK, BO_MTX(bo)) == ENOLCK) { 1324 BO_LOCK(bo); 1325 continue; /* retry */ 1326 } 1327 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1328 B_DELWRI) { 1329 bremfree(bp); 1330 bp->b_flags &= ~B_ASYNC; 1331 bwrite(bp); 1332 ++nfs_commit_miss; 1333 } else 1334 BUF_UNLOCK(bp); 1335 BO_LOCK(bo); 1336 } 1337 ++nfs_commit_blks; 1338 if (cnt < iosize) 1339 break; 1340 cnt -= iosize; 1341 ++lblkno; 1342 } 1343 BO_UNLOCK(bo); 1344 } 1345 NFSEXITCODE(error); 1346 return (error); 1347 } 1348 1349 /* 1350 * Statfs vnode op. 1351 */ 1352 int 1353 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1354 { 1355 int error; 1356 1357 error = VFS_STATFS(vp->v_mount, sf); 1358 if (error == 0) { 1359 /* 1360 * Since NFS handles these values as unsigned on the 1361 * wire, there is no way to represent negative values, 1362 * so set them to 0. Without this, they will appear 1363 * to be very large positive values for clients like 1364 * Solaris10. 1365 */ 1366 if (sf->f_bavail < 0) 1367 sf->f_bavail = 0; 1368 if (sf->f_ffree < 0) 1369 sf->f_ffree = 0; 1370 } 1371 NFSEXITCODE(error); 1372 return (error); 1373 } 1374 1375 /* 1376 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1377 * must handle nfsrv_opencheck() calls after any other access checks. 1378 */ 1379 void 1380 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1381 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1382 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1383 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1384 struct nfsexstuff *exp, struct vnode **vpp) 1385 { 1386 struct vnode *vp = NULL; 1387 u_quad_t tempsize; 1388 struct nfsexstuff nes; 1389 1390 if (ndp->ni_vp == NULL) 1391 nd->nd_repstat = nfsrv_opencheck(clientid, 1392 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1393 if (!nd->nd_repstat) { 1394 if (ndp->ni_vp == NULL) { 1395 vrele(ndp->ni_startdir); 1396 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1397 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1398 vput(ndp->ni_dvp); 1399 nfsvno_relpathbuf(ndp); 1400 if (!nd->nd_repstat) { 1401 if (*exclusive_flagp) { 1402 *exclusive_flagp = 0; 1403 NFSVNO_ATTRINIT(nvap); 1404 nvap->na_atime.tv_sec = cverf[0]; 1405 nvap->na_atime.tv_nsec = cverf[1]; 1406 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1407 &nvap->na_vattr, cred); 1408 } else { 1409 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1410 aclp, p, attrbitp, exp); 1411 } 1412 } 1413 vp = ndp->ni_vp; 1414 } else { 1415 if (ndp->ni_startdir) 1416 vrele(ndp->ni_startdir); 1417 nfsvno_relpathbuf(ndp); 1418 vp = ndp->ni_vp; 1419 if (create == NFSV4OPEN_CREATE) { 1420 if (ndp->ni_dvp == vp) 1421 vrele(ndp->ni_dvp); 1422 else 1423 vput(ndp->ni_dvp); 1424 } 1425 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1426 if (ndp->ni_cnd.cn_flags & RDONLY) 1427 NFSVNO_SETEXRDONLY(&nes); 1428 else 1429 NFSVNO_EXINIT(&nes); 1430 nd->nd_repstat = nfsvno_accchk(vp, 1431 VWRITE, cred, &nes, p, 1432 NFSACCCHK_NOOVERRIDE, 1433 NFSACCCHK_VPISLOCKED, NULL); 1434 nd->nd_repstat = nfsrv_opencheck(clientid, 1435 stateidp, stp, vp, nd, p, nd->nd_repstat); 1436 if (!nd->nd_repstat) { 1437 tempsize = nvap->na_size; 1438 NFSVNO_ATTRINIT(nvap); 1439 nvap->na_size = tempsize; 1440 nd->nd_repstat = VOP_SETATTR(vp, 1441 &nvap->na_vattr, cred); 1442 } 1443 } else if (vp->v_type == VREG) { 1444 nd->nd_repstat = nfsrv_opencheck(clientid, 1445 stateidp, stp, vp, nd, p, nd->nd_repstat); 1446 } 1447 } 1448 } else { 1449 if (ndp->ni_cnd.cn_flags & HASBUF) 1450 nfsvno_relpathbuf(ndp); 1451 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1452 vrele(ndp->ni_startdir); 1453 if (ndp->ni_dvp == ndp->ni_vp) 1454 vrele(ndp->ni_dvp); 1455 else 1456 vput(ndp->ni_dvp); 1457 if (ndp->ni_vp) 1458 vput(ndp->ni_vp); 1459 } 1460 } 1461 *vpp = vp; 1462 1463 NFSEXITCODE2(0, nd); 1464 } 1465 1466 /* 1467 * Updates the file rev and sets the mtime and ctime 1468 * to the current clock time, returning the va_filerev and va_Xtime 1469 * values. 1470 */ 1471 void 1472 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1473 struct ucred *cred, struct thread *p) 1474 { 1475 struct vattr va; 1476 1477 VATTR_NULL(&va); 1478 getnanotime(&va.va_mtime); 1479 (void) VOP_SETATTR(vp, &va, cred); 1480 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1481 } 1482 1483 /* 1484 * Glue routine to nfsv4_fillattr(). 1485 */ 1486 int 1487 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1488 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1489 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1490 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1491 { 1492 int error; 1493 1494 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1495 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1496 mounted_on_fileno); 1497 NFSEXITCODE2(0, nd); 1498 return (error); 1499 } 1500 1501 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1502 /* 1503 * nfs readdir service 1504 * - mallocs what it thinks is enough to read 1505 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1506 * - calls VOP_READDIR() 1507 * - loops around building the reply 1508 * if the output generated exceeds count break out of loop 1509 * The NFSM_CLGET macro is used here so that the reply will be packed 1510 * tightly in mbuf clusters. 1511 * - it trims out records with d_fileno == 0 1512 * this doesn't matter for Unix clients, but they might confuse clients 1513 * for other os'. 1514 * - it trims out records with d_type == DT_WHT 1515 * these cannot be seen through NFS (unless we extend the protocol) 1516 * The alternate call nfsrvd_readdirplus() does lookups as well. 1517 * PS: The NFS protocol spec. does not clarify what the "count" byte 1518 * argument is a count of.. just name strings and file id's or the 1519 * entire reply rpc or ... 1520 * I tried just file name and id sizes and it confused the Sun client, 1521 * so I am using the full rpc size now. The "paranoia.." comment refers 1522 * to including the status longwords that are not a part of the dir. 1523 * "entry" structures, but are in the rpc. 1524 */ 1525 int 1526 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1527 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1528 { 1529 struct dirent *dp; 1530 u_int32_t *tl; 1531 int dirlen; 1532 char *cpos, *cend, *rbuf; 1533 struct nfsvattr at; 1534 int nlen, error = 0, getret = 1; 1535 int siz, cnt, fullsiz, eofflag, ncookies; 1536 u_int64_t off, toff, verf; 1537 u_long *cookies = NULL, *cookiep; 1538 struct uio io; 1539 struct iovec iv; 1540 int not_zfs; 1541 1542 if (nd->nd_repstat) { 1543 nfsrv_postopattr(nd, getret, &at); 1544 goto out; 1545 } 1546 if (nd->nd_flag & ND_NFSV2) { 1547 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1548 off = fxdr_unsigned(u_quad_t, *tl++); 1549 } else { 1550 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1551 off = fxdr_hyper(tl); 1552 tl += 2; 1553 verf = fxdr_hyper(tl); 1554 tl += 2; 1555 } 1556 toff = off; 1557 cnt = fxdr_unsigned(int, *tl); 1558 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1559 cnt = NFS_SRVMAXDATA(nd); 1560 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1561 fullsiz = siz; 1562 if (nd->nd_flag & ND_NFSV3) { 1563 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1564 p, 1); 1565 #if 0 1566 /* 1567 * va_filerev is not sufficient as a cookie verifier, 1568 * since it is not supposed to change when entries are 1569 * removed/added unless that offset cookies returned to 1570 * the client are no longer valid. 1571 */ 1572 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1573 nd->nd_repstat = NFSERR_BAD_COOKIE; 1574 #endif 1575 } 1576 if (nd->nd_repstat == 0 && cnt == 0) { 1577 if (nd->nd_flag & ND_NFSV2) 1578 /* NFSv2 does not have NFSERR_TOOSMALL */ 1579 nd->nd_repstat = EPERM; 1580 else 1581 nd->nd_repstat = NFSERR_TOOSMALL; 1582 } 1583 if (!nd->nd_repstat) 1584 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1585 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1586 NFSACCCHK_VPISLOCKED, NULL); 1587 if (nd->nd_repstat) { 1588 vput(vp); 1589 if (nd->nd_flag & ND_NFSV3) 1590 nfsrv_postopattr(nd, getret, &at); 1591 goto out; 1592 } 1593 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1594 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1595 again: 1596 eofflag = 0; 1597 if (cookies) { 1598 free((caddr_t)cookies, M_TEMP); 1599 cookies = NULL; 1600 } 1601 1602 iv.iov_base = rbuf; 1603 iv.iov_len = siz; 1604 io.uio_iov = &iv; 1605 io.uio_iovcnt = 1; 1606 io.uio_offset = (off_t)off; 1607 io.uio_resid = siz; 1608 io.uio_segflg = UIO_SYSSPACE; 1609 io.uio_rw = UIO_READ; 1610 io.uio_td = NULL; 1611 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1612 &cookies); 1613 off = (u_int64_t)io.uio_offset; 1614 if (io.uio_resid) 1615 siz -= io.uio_resid; 1616 1617 if (!cookies && !nd->nd_repstat) 1618 nd->nd_repstat = NFSERR_PERM; 1619 if (nd->nd_flag & ND_NFSV3) { 1620 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1621 if (!nd->nd_repstat) 1622 nd->nd_repstat = getret; 1623 } 1624 1625 /* 1626 * Handles the failed cases. nd->nd_repstat == 0 past here. 1627 */ 1628 if (nd->nd_repstat) { 1629 vput(vp); 1630 free((caddr_t)rbuf, M_TEMP); 1631 if (cookies) 1632 free((caddr_t)cookies, M_TEMP); 1633 if (nd->nd_flag & ND_NFSV3) 1634 nfsrv_postopattr(nd, getret, &at); 1635 goto out; 1636 } 1637 /* 1638 * If nothing read, return eof 1639 * rpc reply 1640 */ 1641 if (siz == 0) { 1642 vput(vp); 1643 if (nd->nd_flag & ND_NFSV2) { 1644 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1645 } else { 1646 nfsrv_postopattr(nd, getret, &at); 1647 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1648 txdr_hyper(at.na_filerev, tl); 1649 tl += 2; 1650 } 1651 *tl++ = newnfs_false; 1652 *tl = newnfs_true; 1653 FREE((caddr_t)rbuf, M_TEMP); 1654 FREE((caddr_t)cookies, M_TEMP); 1655 goto out; 1656 } 1657 1658 /* 1659 * Check for degenerate cases of nothing useful read. 1660 * If so go try again 1661 */ 1662 cpos = rbuf; 1663 cend = rbuf + siz; 1664 dp = (struct dirent *)cpos; 1665 cookiep = cookies; 1666 1667 /* 1668 * For some reason FreeBSD's ufs_readdir() chooses to back the 1669 * directory offset up to a block boundary, so it is necessary to 1670 * skip over the records that precede the requested offset. This 1671 * requires the assumption that file offset cookies monotonically 1672 * increase. 1673 * Since the offset cookies don't monotonically increase for ZFS, 1674 * this is not done when ZFS is the file system. 1675 */ 1676 while (cpos < cend && ncookies > 0 && 1677 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1678 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) { 1679 cpos += dp->d_reclen; 1680 dp = (struct dirent *)cpos; 1681 cookiep++; 1682 ncookies--; 1683 } 1684 if (cpos >= cend || ncookies == 0) { 1685 siz = fullsiz; 1686 toff = off; 1687 goto again; 1688 } 1689 vput(vp); 1690 1691 /* 1692 * dirlen is the size of the reply, including all XDR and must 1693 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1694 * if the XDR should be included in "count", but to be safe, we do. 1695 * (Include the two booleans at the end of the reply in dirlen now.) 1696 */ 1697 if (nd->nd_flag & ND_NFSV3) { 1698 nfsrv_postopattr(nd, getret, &at); 1699 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1700 txdr_hyper(at.na_filerev, tl); 1701 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1702 } else { 1703 dirlen = 2 * NFSX_UNSIGNED; 1704 } 1705 1706 /* Loop through the records and build reply */ 1707 while (cpos < cend && ncookies > 0) { 1708 nlen = dp->d_namlen; 1709 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1710 nlen <= NFS_MAXNAMLEN) { 1711 if (nd->nd_flag & ND_NFSV3) 1712 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1713 else 1714 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1715 if (dirlen > cnt) { 1716 eofflag = 0; 1717 break; 1718 } 1719 1720 /* 1721 * Build the directory record xdr from 1722 * the dirent entry. 1723 */ 1724 if (nd->nd_flag & ND_NFSV3) { 1725 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1726 *tl++ = newnfs_true; 1727 *tl++ = 0; 1728 } else { 1729 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1730 *tl++ = newnfs_true; 1731 } 1732 *tl = txdr_unsigned(dp->d_fileno); 1733 (void) nfsm_strtom(nd, dp->d_name, nlen); 1734 if (nd->nd_flag & ND_NFSV3) { 1735 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1736 *tl++ = 0; 1737 } else 1738 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1739 *tl = txdr_unsigned(*cookiep); 1740 } 1741 cpos += dp->d_reclen; 1742 dp = (struct dirent *)cpos; 1743 cookiep++; 1744 ncookies--; 1745 } 1746 if (cpos < cend) 1747 eofflag = 0; 1748 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1749 *tl++ = newnfs_false; 1750 if (eofflag) 1751 *tl = newnfs_true; 1752 else 1753 *tl = newnfs_false; 1754 FREE((caddr_t)rbuf, M_TEMP); 1755 FREE((caddr_t)cookies, M_TEMP); 1756 1757 out: 1758 NFSEXITCODE2(0, nd); 1759 return (0); 1760 nfsmout: 1761 vput(vp); 1762 NFSEXITCODE2(error, nd); 1763 return (error); 1764 } 1765 1766 /* 1767 * Readdirplus for V3 and Readdir for V4. 1768 */ 1769 int 1770 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1771 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1772 { 1773 struct dirent *dp; 1774 u_int32_t *tl; 1775 int dirlen; 1776 char *cpos, *cend, *rbuf; 1777 struct vnode *nvp; 1778 fhandle_t nfh; 1779 struct nfsvattr nva, at, *nvap = &nva; 1780 struct mbuf *mb0, *mb1; 1781 struct nfsreferral *refp; 1782 int nlen, r, error = 0, getret = 1, usevget = 1; 1783 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1784 caddr_t bpos0, bpos1; 1785 u_int64_t off, toff, verf; 1786 u_long *cookies = NULL, *cookiep; 1787 nfsattrbit_t attrbits, rderrbits, savbits; 1788 struct uio io; 1789 struct iovec iv; 1790 struct componentname cn; 1791 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls; 1792 struct mount *mp, *new_mp; 1793 uint64_t mounted_on_fileno; 1794 1795 if (nd->nd_repstat) { 1796 nfsrv_postopattr(nd, getret, &at); 1797 goto out; 1798 } 1799 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1800 off = fxdr_hyper(tl); 1801 toff = off; 1802 tl += 2; 1803 verf = fxdr_hyper(tl); 1804 tl += 2; 1805 siz = fxdr_unsigned(int, *tl++); 1806 cnt = fxdr_unsigned(int, *tl); 1807 1808 /* 1809 * Use the server's maximum data transfer size as the upper bound 1810 * on reply datalen. 1811 */ 1812 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1813 cnt = NFS_SRVMAXDATA(nd); 1814 1815 /* 1816 * siz is a "hint" of how much directory information (name, fileid, 1817 * cookie) should be in the reply. At least one client "hints" 0, 1818 * so I set it to cnt for that case. I also round it up to the 1819 * next multiple of DIRBLKSIZ. 1820 */ 1821 if (siz <= 0) 1822 siz = cnt; 1823 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1824 1825 if (nd->nd_flag & ND_NFSV4) { 1826 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1827 if (error) 1828 goto nfsmout; 1829 NFSSET_ATTRBIT(&savbits, &attrbits); 1830 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1831 NFSZERO_ATTRBIT(&rderrbits); 1832 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1833 } else { 1834 NFSZERO_ATTRBIT(&attrbits); 1835 } 1836 fullsiz = siz; 1837 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1838 if (!nd->nd_repstat) { 1839 if (off && verf != at.na_filerev) { 1840 /* 1841 * va_filerev is not sufficient as a cookie verifier, 1842 * since it is not supposed to change when entries are 1843 * removed/added unless that offset cookies returned to 1844 * the client are no longer valid. 1845 */ 1846 #if 0 1847 if (nd->nd_flag & ND_NFSV4) { 1848 nd->nd_repstat = NFSERR_NOTSAME; 1849 } else { 1850 nd->nd_repstat = NFSERR_BAD_COOKIE; 1851 } 1852 #endif 1853 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1854 nd->nd_repstat = NFSERR_BAD_COOKIE; 1855 } 1856 } 1857 if (!nd->nd_repstat && vp->v_type != VDIR) 1858 nd->nd_repstat = NFSERR_NOTDIR; 1859 if (!nd->nd_repstat && cnt == 0) 1860 nd->nd_repstat = NFSERR_TOOSMALL; 1861 if (!nd->nd_repstat) 1862 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1863 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1864 NFSACCCHK_VPISLOCKED, NULL); 1865 if (nd->nd_repstat) { 1866 vput(vp); 1867 if (nd->nd_flag & ND_NFSV3) 1868 nfsrv_postopattr(nd, getret, &at); 1869 goto out; 1870 } 1871 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1872 1873 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1874 again: 1875 eofflag = 0; 1876 if (cookies) { 1877 free((caddr_t)cookies, M_TEMP); 1878 cookies = NULL; 1879 } 1880 1881 iv.iov_base = rbuf; 1882 iv.iov_len = siz; 1883 io.uio_iov = &iv; 1884 io.uio_iovcnt = 1; 1885 io.uio_offset = (off_t)off; 1886 io.uio_resid = siz; 1887 io.uio_segflg = UIO_SYSSPACE; 1888 io.uio_rw = UIO_READ; 1889 io.uio_td = NULL; 1890 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1891 &cookies); 1892 off = (u_int64_t)io.uio_offset; 1893 if (io.uio_resid) 1894 siz -= io.uio_resid; 1895 1896 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1897 1898 if (!cookies && !nd->nd_repstat) 1899 nd->nd_repstat = NFSERR_PERM; 1900 if (!nd->nd_repstat) 1901 nd->nd_repstat = getret; 1902 if (nd->nd_repstat) { 1903 vput(vp); 1904 if (cookies) 1905 free((caddr_t)cookies, M_TEMP); 1906 free((caddr_t)rbuf, M_TEMP); 1907 if (nd->nd_flag & ND_NFSV3) 1908 nfsrv_postopattr(nd, getret, &at); 1909 goto out; 1910 } 1911 /* 1912 * If nothing read, return eof 1913 * rpc reply 1914 */ 1915 if (siz == 0) { 1916 vput(vp); 1917 if (nd->nd_flag & ND_NFSV3) 1918 nfsrv_postopattr(nd, getret, &at); 1919 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1920 txdr_hyper(at.na_filerev, tl); 1921 tl += 2; 1922 *tl++ = newnfs_false; 1923 *tl = newnfs_true; 1924 free((caddr_t)cookies, M_TEMP); 1925 free((caddr_t)rbuf, M_TEMP); 1926 goto out; 1927 } 1928 1929 /* 1930 * Check for degenerate cases of nothing useful read. 1931 * If so go try again 1932 */ 1933 cpos = rbuf; 1934 cend = rbuf + siz; 1935 dp = (struct dirent *)cpos; 1936 cookiep = cookies; 1937 1938 /* 1939 * For some reason FreeBSD's ufs_readdir() chooses to back the 1940 * directory offset up to a block boundary, so it is necessary to 1941 * skip over the records that precede the requested offset. This 1942 * requires the assumption that file offset cookies monotonically 1943 * increase. 1944 * Since the offset cookies don't monotonically increase for ZFS, 1945 * this is not done when ZFS is the file system. 1946 */ 1947 while (cpos < cend && ncookies > 0 && 1948 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1949 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) || 1950 ((nd->nd_flag & ND_NFSV4) && 1951 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1952 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1953 cpos += dp->d_reclen; 1954 dp = (struct dirent *)cpos; 1955 cookiep++; 1956 ncookies--; 1957 } 1958 if (cpos >= cend || ncookies == 0) { 1959 siz = fullsiz; 1960 toff = off; 1961 goto again; 1962 } 1963 1964 /* 1965 * Busy the file system so that the mount point won't go away 1966 * and, as such, VFS_VGET() can be used safely. 1967 */ 1968 mp = vp->v_mount; 1969 vfs_ref(mp); 1970 NFSVOPUNLOCK(vp, 0); 1971 nd->nd_repstat = vfs_busy(mp, 0); 1972 vfs_rel(mp); 1973 if (nd->nd_repstat != 0) { 1974 vrele(vp); 1975 free(cookies, M_TEMP); 1976 free(rbuf, M_TEMP); 1977 if (nd->nd_flag & ND_NFSV3) 1978 nfsrv_postopattr(nd, getret, &at); 1979 goto out; 1980 } 1981 1982 /* 1983 * Save this position, in case there is an error before one entry 1984 * is created. 1985 */ 1986 mb0 = nd->nd_mb; 1987 bpos0 = nd->nd_bpos; 1988 1989 /* 1990 * Fill in the first part of the reply. 1991 * dirlen is the reply length in bytes and cannot exceed cnt. 1992 * (Include the two booleans at the end of the reply in dirlen now, 1993 * so we recognize when we have exceeded cnt.) 1994 */ 1995 if (nd->nd_flag & ND_NFSV3) { 1996 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1997 nfsrv_postopattr(nd, getret, &at); 1998 } else { 1999 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2000 } 2001 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2002 txdr_hyper(at.na_filerev, tl); 2003 2004 /* 2005 * Save this position, in case there is an empty reply needed. 2006 */ 2007 mb1 = nd->nd_mb; 2008 bpos1 = nd->nd_bpos; 2009 2010 /* Loop through the records and build reply */ 2011 entrycnt = 0; 2012 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2013 nlen = dp->d_namlen; 2014 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2015 nlen <= NFS_MAXNAMLEN && 2016 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2017 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2018 || (nlen == 1 && dp->d_name[0] != '.'))) { 2019 /* 2020 * Save the current position in the reply, in case 2021 * this entry exceeds cnt. 2022 */ 2023 mb1 = nd->nd_mb; 2024 bpos1 = nd->nd_bpos; 2025 2026 /* 2027 * For readdir_and_lookup get the vnode using 2028 * the file number. 2029 */ 2030 nvp = NULL; 2031 refp = NULL; 2032 r = 0; 2033 at_root = 0; 2034 needs_unbusy = 0; 2035 new_mp = mp; 2036 mounted_on_fileno = (uint64_t)dp->d_fileno; 2037 if ((nd->nd_flag & ND_NFSV3) || 2038 NFSNONZERO_ATTRBIT(&savbits)) { 2039 if (nd->nd_flag & ND_NFSV4) 2040 refp = nfsv4root_getreferral(NULL, 2041 vp, dp->d_fileno); 2042 if (refp == NULL) { 2043 if (usevget) 2044 r = VFS_VGET(mp, dp->d_fileno, 2045 LK_SHARED, &nvp); 2046 else 2047 r = EOPNOTSUPP; 2048 if (r == EOPNOTSUPP) { 2049 if (usevget) { 2050 usevget = 0; 2051 cn.cn_nameiop = LOOKUP; 2052 cn.cn_lkflags = 2053 LK_SHARED | 2054 LK_RETRY; 2055 cn.cn_cred = 2056 nd->nd_cred; 2057 cn.cn_thread = p; 2058 } 2059 cn.cn_nameptr = dp->d_name; 2060 cn.cn_namelen = nlen; 2061 cn.cn_flags = ISLASTCN | 2062 NOFOLLOW | LOCKLEAF | 2063 MPSAFE; 2064 if (nlen == 2 && 2065 dp->d_name[0] == '.' && 2066 dp->d_name[1] == '.') 2067 cn.cn_flags |= 2068 ISDOTDOT; 2069 if (NFSVOPLOCK(vp, LK_SHARED) 2070 != 0) { 2071 nd->nd_repstat = EPERM; 2072 break; 2073 } 2074 if ((vp->v_vflag & VV_ROOT) != 0 2075 && (cn.cn_flags & ISDOTDOT) 2076 != 0) { 2077 vref(vp); 2078 nvp = vp; 2079 r = 0; 2080 } else { 2081 r = VOP_LOOKUP(vp, &nvp, 2082 &cn); 2083 if (vp != nvp) 2084 NFSVOPUNLOCK(vp, 2085 0); 2086 } 2087 } 2088 2089 /* 2090 * For NFSv4, check to see if nvp is 2091 * a mount point and get the mount 2092 * point vnode, as required. 2093 */ 2094 if (r == 0 && 2095 nfsrv_enable_crossmntpt != 0 && 2096 (nd->nd_flag & ND_NFSV4) != 0 && 2097 nvp->v_type == VDIR && 2098 nvp->v_mountedhere != NULL) { 2099 new_mp = nvp->v_mountedhere; 2100 r = vfs_busy(new_mp, 0); 2101 vput(nvp); 2102 nvp = NULL; 2103 if (r == 0) { 2104 r = VFS_ROOT(new_mp, 2105 LK_SHARED, &nvp); 2106 needs_unbusy = 1; 2107 if (r == 0) 2108 at_root = 1; 2109 } 2110 } 2111 } 2112 if (!r) { 2113 if (refp == NULL && 2114 ((nd->nd_flag & ND_NFSV3) || 2115 NFSNONZERO_ATTRBIT(&attrbits))) { 2116 r = nfsvno_getfh(nvp, &nfh, p); 2117 if (!r) 2118 r = nfsvno_getattr(nvp, nvap, 2119 nd->nd_cred, p, 1); 2120 } 2121 } else { 2122 nvp = NULL; 2123 } 2124 if (r) { 2125 if (!NFSISSET_ATTRBIT(&attrbits, 2126 NFSATTRBIT_RDATTRERROR)) { 2127 if (nvp != NULL) 2128 vput(nvp); 2129 if (needs_unbusy != 0) 2130 vfs_unbusy(new_mp); 2131 nd->nd_repstat = r; 2132 break; 2133 } 2134 } 2135 } 2136 2137 /* 2138 * Build the directory record xdr 2139 */ 2140 if (nd->nd_flag & ND_NFSV3) { 2141 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2142 *tl++ = newnfs_true; 2143 *tl++ = 0; 2144 *tl = txdr_unsigned(dp->d_fileno); 2145 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2146 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2147 *tl++ = 0; 2148 *tl = txdr_unsigned(*cookiep); 2149 nfsrv_postopattr(nd, 0, nvap); 2150 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2151 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2152 if (nvp != NULL) 2153 vput(nvp); 2154 } else { 2155 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2156 *tl++ = newnfs_true; 2157 *tl++ = 0; 2158 *tl = txdr_unsigned(*cookiep); 2159 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2160 if (nvp != NULL) { 2161 supports_nfsv4acls = 2162 nfs_supportsnfsv4acls(nvp); 2163 NFSVOPUNLOCK(nvp, 0); 2164 } else 2165 supports_nfsv4acls = 0; 2166 if (refp != NULL) { 2167 dirlen += nfsrv_putreferralattr(nd, 2168 &savbits, refp, 0, 2169 &nd->nd_repstat); 2170 if (nd->nd_repstat) { 2171 if (nvp != NULL) 2172 vrele(nvp); 2173 if (needs_unbusy != 0) 2174 vfs_unbusy(new_mp); 2175 break; 2176 } 2177 } else if (r) { 2178 dirlen += nfsvno_fillattr(nd, new_mp, 2179 nvp, nvap, &nfh, r, &rderrbits, 2180 nd->nd_cred, p, isdgram, 0, 2181 supports_nfsv4acls, at_root, 2182 mounted_on_fileno); 2183 } else { 2184 dirlen += nfsvno_fillattr(nd, new_mp, 2185 nvp, nvap, &nfh, r, &attrbits, 2186 nd->nd_cred, p, isdgram, 0, 2187 supports_nfsv4acls, at_root, 2188 mounted_on_fileno); 2189 } 2190 if (nvp != NULL) 2191 vrele(nvp); 2192 dirlen += (3 * NFSX_UNSIGNED); 2193 } 2194 if (needs_unbusy != 0) 2195 vfs_unbusy(new_mp); 2196 if (dirlen <= cnt) 2197 entrycnt++; 2198 } 2199 cpos += dp->d_reclen; 2200 dp = (struct dirent *)cpos; 2201 cookiep++; 2202 ncookies--; 2203 } 2204 vrele(vp); 2205 vfs_unbusy(mp); 2206 2207 /* 2208 * If dirlen > cnt, we must strip off the last entry. If that 2209 * results in an empty reply, report NFSERR_TOOSMALL. 2210 */ 2211 if (dirlen > cnt || nd->nd_repstat) { 2212 if (!nd->nd_repstat && entrycnt == 0) 2213 nd->nd_repstat = NFSERR_TOOSMALL; 2214 if (nd->nd_repstat) 2215 newnfs_trimtrailing(nd, mb0, bpos0); 2216 else 2217 newnfs_trimtrailing(nd, mb1, bpos1); 2218 eofflag = 0; 2219 } else if (cpos < cend) 2220 eofflag = 0; 2221 if (!nd->nd_repstat) { 2222 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2223 *tl++ = newnfs_false; 2224 if (eofflag) 2225 *tl = newnfs_true; 2226 else 2227 *tl = newnfs_false; 2228 } 2229 FREE((caddr_t)cookies, M_TEMP); 2230 FREE((caddr_t)rbuf, M_TEMP); 2231 2232 out: 2233 NFSEXITCODE2(0, nd); 2234 return (0); 2235 nfsmout: 2236 vput(vp); 2237 NFSEXITCODE2(error, nd); 2238 return (error); 2239 } 2240 2241 /* 2242 * Get the settable attributes out of the mbuf list. 2243 * (Return 0 or EBADRPC) 2244 */ 2245 int 2246 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2247 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2248 { 2249 u_int32_t *tl; 2250 struct nfsv2_sattr *sp; 2251 struct timeval curtime; 2252 int error = 0, toclient = 0; 2253 2254 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2255 case ND_NFSV2: 2256 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2257 /* 2258 * Some old clients didn't fill in the high order 16bits. 2259 * --> check the low order 2 bytes for 0xffff 2260 */ 2261 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2262 nvap->na_mode = nfstov_mode(sp->sa_mode); 2263 if (sp->sa_uid != newnfs_xdrneg1) 2264 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2265 if (sp->sa_gid != newnfs_xdrneg1) 2266 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2267 if (sp->sa_size != newnfs_xdrneg1) 2268 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2269 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2270 #ifdef notyet 2271 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2272 #else 2273 nvap->na_atime.tv_sec = 2274 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2275 nvap->na_atime.tv_nsec = 0; 2276 #endif 2277 } 2278 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2279 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2280 break; 2281 case ND_NFSV3: 2282 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2283 if (*tl == newnfs_true) { 2284 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2285 nvap->na_mode = nfstov_mode(*tl); 2286 } 2287 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2288 if (*tl == newnfs_true) { 2289 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2290 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2291 } 2292 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2293 if (*tl == newnfs_true) { 2294 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2295 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2296 } 2297 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2298 if (*tl == newnfs_true) { 2299 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2300 nvap->na_size = fxdr_hyper(tl); 2301 } 2302 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2303 switch (fxdr_unsigned(int, *tl)) { 2304 case NFSV3SATTRTIME_TOCLIENT: 2305 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2306 fxdr_nfsv3time(tl, &nvap->na_atime); 2307 toclient = 1; 2308 break; 2309 case NFSV3SATTRTIME_TOSERVER: 2310 NFSGETTIME(&curtime); 2311 nvap->na_atime.tv_sec = curtime.tv_sec; 2312 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000; 2313 nvap->na_vaflags |= VA_UTIMES_NULL; 2314 break; 2315 }; 2316 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2317 switch (fxdr_unsigned(int, *tl)) { 2318 case NFSV3SATTRTIME_TOCLIENT: 2319 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2320 fxdr_nfsv3time(tl, &nvap->na_mtime); 2321 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2322 break; 2323 case NFSV3SATTRTIME_TOSERVER: 2324 NFSGETTIME(&curtime); 2325 nvap->na_mtime.tv_sec = curtime.tv_sec; 2326 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000; 2327 if (!toclient) 2328 nvap->na_vaflags |= VA_UTIMES_NULL; 2329 break; 2330 }; 2331 break; 2332 case ND_NFSV4: 2333 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2334 }; 2335 nfsmout: 2336 NFSEXITCODE2(error, nd); 2337 return (error); 2338 } 2339 2340 /* 2341 * Handle the setable attributes for V4. 2342 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2343 */ 2344 int 2345 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2346 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2347 { 2348 u_int32_t *tl; 2349 int attrsum = 0; 2350 int i, j; 2351 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2352 int toclient = 0; 2353 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2354 uid_t uid; 2355 gid_t gid; 2356 struct timeval curtime; 2357 2358 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2359 if (error) 2360 goto nfsmout; 2361 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2362 attrsize = fxdr_unsigned(int, *tl); 2363 2364 /* 2365 * Loop around getting the setable attributes. If an unsupported 2366 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2367 */ 2368 if (retnotsup) { 2369 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2370 bitpos = NFSATTRBIT_MAX; 2371 } else { 2372 bitpos = 0; 2373 } 2374 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2375 if (attrsum > attrsize) { 2376 error = NFSERR_BADXDR; 2377 goto nfsmout; 2378 } 2379 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2380 switch (bitpos) { 2381 case NFSATTRBIT_SIZE: 2382 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2383 nvap->na_size = fxdr_hyper(tl); 2384 attrsum += NFSX_HYPER; 2385 break; 2386 case NFSATTRBIT_ACL: 2387 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2388 p); 2389 if (error) 2390 goto nfsmout; 2391 if (aceerr && !nd->nd_repstat) 2392 nd->nd_repstat = aceerr; 2393 attrsum += aclsize; 2394 break; 2395 case NFSATTRBIT_ARCHIVE: 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_HIDDEN: 2402 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2403 if (!nd->nd_repstat) 2404 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2405 attrsum += NFSX_UNSIGNED; 2406 break; 2407 case NFSATTRBIT_MIMETYPE: 2408 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2409 i = fxdr_unsigned(int, *tl); 2410 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2411 if (error) 2412 goto nfsmout; 2413 if (!nd->nd_repstat) 2414 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2415 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2416 break; 2417 case NFSATTRBIT_MODE: 2418 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2419 nvap->na_mode = nfstov_mode(*tl); 2420 attrsum += NFSX_UNSIGNED; 2421 break; 2422 case NFSATTRBIT_OWNER: 2423 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2424 j = fxdr_unsigned(int, *tl); 2425 if (j < 0) { 2426 error = NFSERR_BADXDR; 2427 goto nfsmout; 2428 } 2429 if (j > NFSV4_SMALLSTR) 2430 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2431 else 2432 cp = namestr; 2433 error = nfsrv_mtostr(nd, cp, j); 2434 if (error) { 2435 if (j > NFSV4_SMALLSTR) 2436 free(cp, M_NFSSTRING); 2437 goto nfsmout; 2438 } 2439 if (!nd->nd_repstat) { 2440 nd->nd_repstat = nfsv4_strtouid(cp,j,&uid,p); 2441 if (!nd->nd_repstat) 2442 nvap->na_uid = uid; 2443 } 2444 if (j > NFSV4_SMALLSTR) 2445 free(cp, M_NFSSTRING); 2446 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2447 break; 2448 case NFSATTRBIT_OWNERGROUP: 2449 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2450 j = fxdr_unsigned(int, *tl); 2451 if (j < 0) { 2452 error = NFSERR_BADXDR; 2453 goto nfsmout; 2454 } 2455 if (j > NFSV4_SMALLSTR) 2456 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2457 else 2458 cp = namestr; 2459 error = nfsrv_mtostr(nd, cp, j); 2460 if (error) { 2461 if (j > NFSV4_SMALLSTR) 2462 free(cp, M_NFSSTRING); 2463 goto nfsmout; 2464 } 2465 if (!nd->nd_repstat) { 2466 nd->nd_repstat = nfsv4_strtogid(cp,j,&gid,p); 2467 if (!nd->nd_repstat) 2468 nvap->na_gid = gid; 2469 } 2470 if (j > NFSV4_SMALLSTR) 2471 free(cp, M_NFSSTRING); 2472 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2473 break; 2474 case NFSATTRBIT_SYSTEM: 2475 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2476 if (!nd->nd_repstat) 2477 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2478 attrsum += NFSX_UNSIGNED; 2479 break; 2480 case NFSATTRBIT_TIMEACCESSSET: 2481 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2482 attrsum += NFSX_UNSIGNED; 2483 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2484 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2485 fxdr_nfsv4time(tl, &nvap->na_atime); 2486 toclient = 1; 2487 attrsum += NFSX_V4TIME; 2488 } else { 2489 NFSGETTIME(&curtime); 2490 nvap->na_atime.tv_sec = curtime.tv_sec; 2491 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000; 2492 nvap->na_vaflags |= VA_UTIMES_NULL; 2493 } 2494 break; 2495 case NFSATTRBIT_TIMEBACKUP: 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_TIMECREATE: 2502 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2503 if (!nd->nd_repstat) 2504 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2505 attrsum += NFSX_V4TIME; 2506 break; 2507 case NFSATTRBIT_TIMEMODIFYSET: 2508 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2509 attrsum += NFSX_UNSIGNED; 2510 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2511 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2512 fxdr_nfsv4time(tl, &nvap->na_mtime); 2513 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2514 attrsum += NFSX_V4TIME; 2515 } else { 2516 NFSGETTIME(&curtime); 2517 nvap->na_mtime.tv_sec = curtime.tv_sec; 2518 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000; 2519 if (!toclient) 2520 nvap->na_vaflags |= VA_UTIMES_NULL; 2521 } 2522 break; 2523 default: 2524 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2525 /* 2526 * set bitpos so we drop out of the loop. 2527 */ 2528 bitpos = NFSATTRBIT_MAX; 2529 break; 2530 }; 2531 } 2532 2533 /* 2534 * some clients pad the attrlist, so we need to skip over the 2535 * padding. 2536 */ 2537 if (attrsum > attrsize) { 2538 error = NFSERR_BADXDR; 2539 } else { 2540 attrsize = NFSM_RNDUP(attrsize); 2541 if (attrsum < attrsize) 2542 error = nfsm_advance(nd, attrsize - attrsum, -1); 2543 } 2544 nfsmout: 2545 NFSEXITCODE2(error, nd); 2546 return (error); 2547 } 2548 2549 /* 2550 * Check/setup export credentials. 2551 */ 2552 int 2553 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2554 struct ucred *credanon) 2555 { 2556 int error = 0; 2557 2558 /* 2559 * Check/setup credentials. 2560 */ 2561 if (nd->nd_flag & ND_GSS) 2562 exp->nes_exflag &= ~MNT_EXPORTANON; 2563 2564 /* 2565 * Check to see if the operation is allowed for this security flavor. 2566 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2567 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2568 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2569 */ 2570 if (nfsvno_testexp(nd, exp) && 2571 nd->nd_procnum != NFSV4OP_SECINFO && 2572 nd->nd_procnum != NFSPROC_FSINFO) { 2573 if (nd->nd_flag & ND_NFSV4) 2574 error = NFSERR_WRONGSEC; 2575 else 2576 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2577 goto out; 2578 } 2579 2580 /* 2581 * Check to see if the file system is exported V4 only. 2582 */ 2583 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2584 error = NFSERR_PROGNOTV4; 2585 goto out; 2586 } 2587 2588 /* 2589 * Now, map the user credentials. 2590 * (Note that ND_AUTHNONE will only be set for an NFSv3 2591 * Fsinfo RPC. If set for anything else, this code might need 2592 * to change.) 2593 */ 2594 if (NFSVNO_EXPORTED(exp) && 2595 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) || 2596 NFSVNO_EXPORTANON(exp) || 2597 (nd->nd_flag & ND_AUTHNONE))) { 2598 nd->nd_cred->cr_uid = credanon->cr_uid; 2599 nd->nd_cred->cr_gid = credanon->cr_gid; 2600 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2601 credanon->cr_groups); 2602 } 2603 2604 out: 2605 NFSEXITCODE2(error, nd); 2606 return (error); 2607 } 2608 2609 /* 2610 * Check exports. 2611 */ 2612 int 2613 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2614 struct ucred **credp) 2615 { 2616 int i, error, *secflavors; 2617 2618 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2619 &exp->nes_numsecflavor, &secflavors); 2620 if (error) { 2621 if (nfs_rootfhset) { 2622 exp->nes_exflag = 0; 2623 exp->nes_numsecflavor = 0; 2624 error = 0; 2625 } 2626 } else { 2627 /* Copy the security flavors. */ 2628 for (i = 0; i < exp->nes_numsecflavor; i++) 2629 exp->nes_secflavors[i] = secflavors[i]; 2630 } 2631 NFSEXITCODE(error); 2632 return (error); 2633 } 2634 2635 /* 2636 * Get a vnode for a file handle and export stuff. 2637 */ 2638 int 2639 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2640 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2641 struct ucred **credp) 2642 { 2643 int i, error, *secflavors; 2644 2645 *credp = NULL; 2646 exp->nes_numsecflavor = 0; 2647 if (VFS_NEEDSGIANT(mp)) 2648 error = ESTALE; 2649 else 2650 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2651 if (error != 0) 2652 /* Make sure the server replies ESTALE to the client. */ 2653 error = ESTALE; 2654 if (nam && !error) { 2655 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2656 &exp->nes_numsecflavor, &secflavors); 2657 if (error) { 2658 if (nfs_rootfhset) { 2659 exp->nes_exflag = 0; 2660 exp->nes_numsecflavor = 0; 2661 error = 0; 2662 } else { 2663 vput(*vpp); 2664 } 2665 } else { 2666 /* Copy the security flavors. */ 2667 for (i = 0; i < exp->nes_numsecflavor; i++) 2668 exp->nes_secflavors[i] = secflavors[i]; 2669 } 2670 } 2671 NFSEXITCODE(error); 2672 return (error); 2673 } 2674 2675 /* 2676 * nfsd_fhtovp() - convert a fh to a vnode ptr 2677 * - look up fsid in mount list (if not found ret error) 2678 * - get vp and export rights by calling nfsvno_fhtovp() 2679 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2680 * for AUTH_SYS 2681 * - if mpp != NULL, return the mount point so that it can 2682 * be used for vn_finished_write() by the caller 2683 */ 2684 void 2685 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2686 struct vnode **vpp, struct nfsexstuff *exp, 2687 struct mount **mpp, int startwrite, struct thread *p) 2688 { 2689 struct mount *mp; 2690 struct ucred *credanon; 2691 fhandle_t *fhp; 2692 2693 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2694 /* 2695 * Check for the special case of the nfsv4root_fh. 2696 */ 2697 mp = vfs_busyfs(&fhp->fh_fsid); 2698 if (mpp != NULL) 2699 *mpp = mp; 2700 if (mp == NULL) { 2701 *vpp = NULL; 2702 nd->nd_repstat = ESTALE; 2703 goto out; 2704 } 2705 2706 if (startwrite) 2707 vn_start_write(NULL, mpp, V_WAIT); 2708 2709 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2710 &credanon); 2711 vfs_unbusy(mp); 2712 2713 /* 2714 * For NFSv4 without a pseudo root fs, unexported file handles 2715 * can be returned, so that Lookup works everywhere. 2716 */ 2717 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2718 !(nd->nd_flag & ND_NFSV4)) { 2719 vput(*vpp); 2720 nd->nd_repstat = EACCES; 2721 } 2722 2723 /* 2724 * Personally, I've never seen any point in requiring a 2725 * reserved port#, since only in the rare case where the 2726 * clients are all boxes with secure system priviledges, 2727 * does it provide any enhanced security, but... some people 2728 * believe it to be useful and keep putting this code back in. 2729 * (There is also some "security checker" out there that 2730 * complains if the nfs server doesn't enforce this.) 2731 * However, note the following: 2732 * RFC3530 (NFSv4) specifies that a reserved port# not be 2733 * required. 2734 * RFC2623 recommends that, if a reserved port# is checked for, 2735 * that there be a way to turn that off--> ifdef'd. 2736 */ 2737 #ifdef NFS_REQRSVPORT 2738 if (!nd->nd_repstat) { 2739 struct sockaddr_in *saddr; 2740 struct sockaddr_in6 *saddr6; 2741 2742 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2743 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2744 if (!(nd->nd_flag & ND_NFSV4) && 2745 ((saddr->sin_family == AF_INET && 2746 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2747 (saddr6->sin6_family == AF_INET6 && 2748 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2749 vput(*vpp); 2750 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2751 } 2752 } 2753 #endif /* NFS_REQRSVPORT */ 2754 2755 /* 2756 * Check/setup credentials. 2757 */ 2758 if (!nd->nd_repstat) { 2759 nd->nd_saveduid = nd->nd_cred->cr_uid; 2760 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2761 if (nd->nd_repstat) 2762 vput(*vpp); 2763 } 2764 if (credanon != NULL) 2765 crfree(credanon); 2766 if (nd->nd_repstat) { 2767 if (startwrite) 2768 vn_finished_write(mp); 2769 *vpp = NULL; 2770 if (mpp != NULL) 2771 *mpp = NULL; 2772 } 2773 2774 out: 2775 NFSEXITCODE2(0, nd); 2776 } 2777 2778 /* 2779 * glue for fp. 2780 */ 2781 int 2782 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2783 { 2784 struct filedesc *fdp; 2785 struct file *fp; 2786 int error = 0; 2787 2788 fdp = p->td_proc->p_fd; 2789 if (fd >= fdp->fd_nfiles || 2790 (fp = fdp->fd_ofiles[fd]) == NULL) { 2791 error = EBADF; 2792 goto out; 2793 } 2794 *fpp = fp; 2795 2796 out: 2797 NFSEXITCODE(error); 2798 return (error); 2799 } 2800 2801 /* 2802 * Called from nfssvc() to update the exports list. Just call 2803 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2804 * in the mount list. 2805 */ 2806 int 2807 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2808 { 2809 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2810 int error = 0; 2811 struct nameidata nd; 2812 fhandle_t fh; 2813 2814 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2815 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2816 nfs_rootfhset = 0; 2817 else if (error == 0) { 2818 if (nfsexargp->fspec == NULL) { 2819 error = EPERM; 2820 goto out; 2821 } 2822 /* 2823 * If fspec != NULL, this is the v4root path. 2824 */ 2825 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_USERSPACE, 2826 nfsexargp->fspec, p); 2827 if ((error = namei(&nd)) != 0) 2828 goto out; 2829 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2830 vrele(nd.ni_vp); 2831 if (!error) { 2832 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2833 NFSBCOPY((caddr_t)&fh, 2834 nfs_rootfh.nfsrvfh_data, 2835 sizeof (fhandle_t)); 2836 nfs_rootfhset = 1; 2837 } 2838 } 2839 2840 out: 2841 NFSEXITCODE(error); 2842 return (error); 2843 } 2844 2845 /* 2846 * Get the tcp socket sequence numbers we need. 2847 * (Maybe this should be moved to the tcp sources?) 2848 */ 2849 int 2850 nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap) 2851 { 2852 struct inpcb *inp; 2853 struct tcpcb *tp; 2854 int error = 0; 2855 2856 inp = sotoinpcb(so); 2857 KASSERT(inp != NULL, ("nfsrv_getsocksndseq: inp == NULL")); 2858 INP_RLOCK(inp); 2859 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 2860 INP_RUNLOCK(inp); 2861 error = EPIPE; 2862 goto out; 2863 } 2864 tp = intotcpcb(inp); 2865 if (tp->t_state != TCPS_ESTABLISHED) { 2866 INP_RUNLOCK(inp); 2867 error = EPIPE; 2868 goto out; 2869 } 2870 *maxp = tp->snd_max; 2871 *unap = tp->snd_una; 2872 INP_RUNLOCK(inp); 2873 2874 out: 2875 NFSEXITCODE(error); 2876 return (error); 2877 } 2878 2879 /* 2880 * This function needs to test to see if the system is near its limit 2881 * for memory allocation via malloc() or mget() and return True iff 2882 * either of these resources are near their limit. 2883 * XXX (For now, this is just a stub.) 2884 */ 2885 int nfsrv_testmalloclimit = 0; 2886 int 2887 nfsrv_mallocmget_limit(void) 2888 { 2889 static int printmesg = 0; 2890 static int testval = 1; 2891 2892 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2893 if ((printmesg++ % 100) == 0) 2894 printf("nfsd: malloc/mget near limit\n"); 2895 return (1); 2896 } 2897 return (0); 2898 } 2899 2900 /* 2901 * BSD specific initialization of a mount point. 2902 */ 2903 void 2904 nfsd_mntinit(void) 2905 { 2906 static int inited = 0; 2907 2908 if (inited) 2909 return; 2910 inited = 1; 2911 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2912 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2913 nfsv4root_mnt.mnt_export = NULL; 2914 TAILQ_INIT(&nfsv4root_opt); 2915 TAILQ_INIT(&nfsv4root_newopt); 2916 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2917 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2918 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2919 } 2920 2921 /* 2922 * Get a vnode for a file handle, without checking exports, etc. 2923 */ 2924 struct vnode * 2925 nfsvno_getvp(fhandle_t *fhp) 2926 { 2927 struct mount *mp; 2928 struct vnode *vp; 2929 int error; 2930 2931 mp = vfs_busyfs(&fhp->fh_fsid); 2932 if (mp == NULL) 2933 return (NULL); 2934 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2935 vfs_unbusy(mp); 2936 if (error) 2937 return (NULL); 2938 return (vp); 2939 } 2940 2941 /* 2942 * Do a local VOP_ADVLOCK(). 2943 */ 2944 int 2945 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2946 u_int64_t end, struct thread *td) 2947 { 2948 int error = 0; 2949 struct flock fl; 2950 u_int64_t tlen; 2951 2952 if (nfsrv_dolocallocks == 0) 2953 goto out; 2954 2955 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */ 2956 if ((vp->v_iflag & VI_DOOMED) != 0) { 2957 error = EPERM; 2958 goto out; 2959 } 2960 2961 fl.l_whence = SEEK_SET; 2962 fl.l_type = ftype; 2963 fl.l_start = (off_t)first; 2964 if (end == NFS64BITSSET) { 2965 fl.l_len = 0; 2966 } else { 2967 tlen = end - first; 2968 fl.l_len = (off_t)tlen; 2969 } 2970 /* 2971 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2972 * values for all calls, so that all locks will be held by the 2973 * nfsd server. (The nfsd server handles conflicts between the 2974 * various clients.) 2975 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2976 * bytes, so it can't be put in l_sysid. 2977 */ 2978 if (nfsv4_sysid == 0) 2979 nfsv4_sysid = nlm_acquire_next_sysid(); 2980 fl.l_pid = (pid_t)0; 2981 fl.l_sysid = (int)nfsv4_sysid; 2982 2983 NFSVOPUNLOCK(vp, 0); 2984 if (ftype == F_UNLCK) 2985 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 2986 (F_POSIX | F_REMOTE)); 2987 else 2988 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 2989 (F_POSIX | F_REMOTE)); 2990 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2991 2992 out: 2993 NFSEXITCODE(error); 2994 return (error); 2995 } 2996 2997 /* 2998 * Check the nfsv4 root exports. 2999 */ 3000 int 3001 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3002 { 3003 struct ucred *credanon; 3004 int exflags, error = 0, numsecflavor, *secflavors, i; 3005 3006 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3007 &credanon, &numsecflavor, &secflavors); 3008 if (error) { 3009 error = NFSERR_PROGUNAVAIL; 3010 goto out; 3011 } 3012 if (credanon != NULL) 3013 crfree(credanon); 3014 for (i = 0; i < numsecflavor; i++) { 3015 if (secflavors[i] == AUTH_SYS) 3016 nd->nd_flag |= ND_EXAUTHSYS; 3017 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3018 nd->nd_flag |= ND_EXGSS; 3019 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3020 nd->nd_flag |= ND_EXGSSINTEGRITY; 3021 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3022 nd->nd_flag |= ND_EXGSSPRIVACY; 3023 } 3024 3025 out: 3026 NFSEXITCODE(error); 3027 return (error); 3028 } 3029 3030 /* 3031 * Nfs server psuedo system call for the nfsd's 3032 */ 3033 /* 3034 * MPSAFE 3035 */ 3036 static int 3037 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3038 { 3039 struct file *fp; 3040 struct nfsd_addsock_args sockarg; 3041 struct nfsd_nfsd_args nfsdarg; 3042 int error; 3043 3044 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3045 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3046 if (error) 3047 goto out; 3048 /* 3049 * Since we don't know what rights might be required, 3050 * pretend that we need them all. It is better to be too 3051 * careful than too reckless. 3052 */ 3053 if ((error = fget(td, sockarg.sock, CAP_SOCK_ALL, &fp)) != 0) 3054 goto out; 3055 if (fp->f_type != DTYPE_SOCKET) { 3056 fdrop(fp, td); 3057 error = EPERM; 3058 goto out; 3059 } 3060 error = nfsrvd_addsock(fp); 3061 fdrop(fp, td); 3062 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3063 if (uap->argp == NULL) { 3064 error = EINVAL; 3065 goto out; 3066 } 3067 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3068 sizeof (nfsdarg)); 3069 if (error) 3070 goto out; 3071 error = nfsrvd_nfsd(td, &nfsdarg); 3072 } else { 3073 error = nfssvc_srvcall(td, uap, td->td_ucred); 3074 } 3075 3076 out: 3077 NFSEXITCODE(error); 3078 return (error); 3079 } 3080 3081 static int 3082 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3083 { 3084 struct nfsex_args export; 3085 struct file *fp = NULL; 3086 int stablefd, len; 3087 struct nfsd_clid adminrevoke; 3088 struct nfsd_dumplist dumplist; 3089 struct nfsd_dumpclients *dumpclients; 3090 struct nfsd_dumplocklist dumplocklist; 3091 struct nfsd_dumplocks *dumplocks; 3092 struct nameidata nd; 3093 vnode_t vp; 3094 int error = EINVAL; 3095 struct proc *procp; 3096 3097 if (uap->flag & NFSSVC_PUBLICFH) { 3098 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3099 sizeof (fhandle_t)); 3100 error = copyin(uap->argp, 3101 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3102 if (!error) 3103 nfs_pubfhset = 1; 3104 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3105 error = copyin(uap->argp,(caddr_t)&export, 3106 sizeof (struct nfsex_args)); 3107 if (!error) 3108 error = nfsrv_v4rootexport(&export, cred, p); 3109 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3110 nfs_pubfhset = 0; 3111 error = 0; 3112 } else if (uap->flag & NFSSVC_STABLERESTART) { 3113 error = copyin(uap->argp, (caddr_t)&stablefd, 3114 sizeof (int)); 3115 if (!error) 3116 error = fp_getfvp(p, stablefd, &fp, &vp); 3117 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3118 error = EBADF; 3119 if (!error && newnfs_numnfsd != 0) 3120 error = EPERM; 3121 if (!error) { 3122 nfsrv_stablefirst.nsf_fp = fp; 3123 nfsrv_setupstable(p); 3124 } 3125 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3126 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3127 sizeof (struct nfsd_clid)); 3128 if (!error) 3129 error = nfsrv_adminrevoke(&adminrevoke, p); 3130 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3131 error = copyin(uap->argp, (caddr_t)&dumplist, 3132 sizeof (struct nfsd_dumplist)); 3133 if (!error && (dumplist.ndl_size < 1 || 3134 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3135 error = EPERM; 3136 if (!error) { 3137 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3138 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3139 M_TEMP, M_WAITOK); 3140 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3141 error = copyout(dumpclients, 3142 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3143 free((caddr_t)dumpclients, M_TEMP); 3144 } 3145 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3146 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3147 sizeof (struct nfsd_dumplocklist)); 3148 if (!error && (dumplocklist.ndllck_size < 1 || 3149 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3150 error = EPERM; 3151 if (!error) 3152 error = nfsrv_lookupfilename(&nd, 3153 dumplocklist.ndllck_fname, p); 3154 if (!error) { 3155 len = sizeof (struct nfsd_dumplocks) * 3156 dumplocklist.ndllck_size; 3157 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3158 M_TEMP, M_WAITOK); 3159 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3160 dumplocklist.ndllck_size, p); 3161 vput(nd.ni_vp); 3162 error = copyout(dumplocks, 3163 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3164 free((caddr_t)dumplocks, M_TEMP); 3165 } 3166 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3167 procp = p->td_proc; 3168 PROC_LOCK(procp); 3169 nfsd_master_pid = procp->p_pid; 3170 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3171 nfsd_master_start = procp->p_stats->p_start; 3172 nfsd_master_proc = procp; 3173 PROC_UNLOCK(procp); 3174 } 3175 3176 NFSEXITCODE(error); 3177 return (error); 3178 } 3179 3180 /* 3181 * Check exports. 3182 * Returns 0 if ok, 1 otherwise. 3183 */ 3184 int 3185 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3186 { 3187 int i; 3188 3189 /* 3190 * This seems odd, but allow the case where the security flavor 3191 * list is empty. This happens when NFSv4 is traversing non-exported 3192 * file systems. Exported file systems should always have a non-empty 3193 * security flavor list. 3194 */ 3195 if (exp->nes_numsecflavor == 0) 3196 return (0); 3197 3198 for (i = 0; i < exp->nes_numsecflavor; i++) { 3199 /* 3200 * The tests for privacy and integrity must be first, 3201 * since ND_GSS is set for everything but AUTH_SYS. 3202 */ 3203 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3204 (nd->nd_flag & ND_GSSPRIVACY)) 3205 return (0); 3206 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3207 (nd->nd_flag & ND_GSSINTEGRITY)) 3208 return (0); 3209 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3210 (nd->nd_flag & ND_GSS)) 3211 return (0); 3212 if (exp->nes_secflavors[i] == AUTH_SYS && 3213 (nd->nd_flag & ND_GSS) == 0) 3214 return (0); 3215 } 3216 return (1); 3217 } 3218 3219 /* 3220 * Calculate a hash value for the fid in a file handle. 3221 */ 3222 uint32_t 3223 nfsrv_hashfh(fhandle_t *fhp) 3224 { 3225 uint32_t hashval; 3226 3227 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3228 return (hashval); 3229 } 3230 3231 /* 3232 * Signal the userland master nfsd to backup the stable restart file. 3233 */ 3234 void 3235 nfsrv_backupstable(void) 3236 { 3237 struct proc *procp; 3238 3239 if (nfsd_master_proc != NULL) { 3240 procp = pfind(nfsd_master_pid); 3241 /* Try to make sure it is the correct process. */ 3242 if (procp == nfsd_master_proc && 3243 procp->p_stats->p_start.tv_sec == 3244 nfsd_master_start.tv_sec && 3245 procp->p_stats->p_start.tv_usec == 3246 nfsd_master_start.tv_usec && 3247 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3248 kern_psignal(procp, SIGUSR2); 3249 else 3250 nfsd_master_proc = NULL; 3251 3252 if (procp != NULL) 3253 PROC_UNLOCK(procp); 3254 } 3255 } 3256 3257 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3258 3259 /* 3260 * Called once to initialize data structures... 3261 */ 3262 static int 3263 nfsd_modevent(module_t mod, int type, void *data) 3264 { 3265 int error = 0; 3266 static int loaded = 0; 3267 3268 switch (type) { 3269 case MOD_LOAD: 3270 if (loaded) 3271 goto out; 3272 newnfs_portinit(); 3273 mtx_init(&nfs_cache_mutex, "nfs_cache_mutex", NULL, MTX_DEF); 3274 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF); 3275 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL, 3276 MTX_DEF); 3277 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3278 nfsrvd_initcache(); 3279 nfsd_init(); 3280 NFSD_LOCK(); 3281 nfsrvd_init(0); 3282 NFSD_UNLOCK(); 3283 nfsd_mntinit(); 3284 #ifdef VV_DISABLEDELEG 3285 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3286 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3287 #endif 3288 nfsd_call_servertimer = nfsrv_servertimer; 3289 nfsd_call_nfsd = nfssvc_nfsd; 3290 loaded = 1; 3291 break; 3292 3293 case MOD_UNLOAD: 3294 if (newnfs_numnfsd != 0) { 3295 error = EBUSY; 3296 break; 3297 } 3298 3299 #ifdef VV_DISABLEDELEG 3300 vn_deleg_ops.vndeleg_recall = NULL; 3301 vn_deleg_ops.vndeleg_disable = NULL; 3302 #endif 3303 nfsd_call_servertimer = NULL; 3304 nfsd_call_nfsd = NULL; 3305 3306 /* Clean out all NFSv4 state. */ 3307 nfsrv_throwawayallstate(curthread); 3308 3309 /* Clean the NFS server reply cache */ 3310 nfsrvd_cleancache(); 3311 3312 /* Free up the krpc server pool. */ 3313 if (nfsrvd_pool != NULL) 3314 svcpool_destroy(nfsrvd_pool); 3315 3316 /* and get rid of the locks */ 3317 mtx_destroy(&nfs_cache_mutex); 3318 mtx_destroy(&nfs_v4root_mutex); 3319 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3320 lockdestroy(&nfsv4root_mnt.mnt_explock); 3321 loaded = 0; 3322 break; 3323 default: 3324 error = EOPNOTSUPP; 3325 break; 3326 } 3327 3328 out: 3329 NFSEXITCODE(error); 3330 return (error); 3331 } 3332 static moduledata_t nfsd_mod = { 3333 "nfsd", 3334 nfsd_modevent, 3335 NULL, 3336 }; 3337 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3338 3339 /* So that loader and kldload(2) can find us, wherever we are.. */ 3340 MODULE_VERSION(nfsd, 1); 3341 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3342 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3343 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3344 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3345 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3346 3347