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/capsicum.h> 38 39 /* 40 * Functions that perform the vfs operations required by the routines in 41 * nfsd_serv.c. It is hoped that this change will make the server more 42 * portable. 43 */ 44 45 #include <fs/nfs/nfsport.h> 46 #include <sys/hash.h> 47 #include <sys/sysctl.h> 48 #include <nlm/nlm_prot.h> 49 #include <nlm/nlm.h> 50 51 FEATURE(nfsd, "NFSv4 server"); 52 53 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 54 extern int nfsrv_useacl; 55 extern int newnfs_numnfsd; 56 extern struct mount nfsv4root_mnt; 57 extern struct nfsrv_stablefirst nfsrv_stablefirst; 58 extern void (*nfsd_call_servertimer)(void); 59 extern SVCPOOL *nfsrvd_pool; 60 extern struct nfsv4lock nfsd_suspend_lock; 61 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 62 NFSDLOCKMUTEX; 63 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 64 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 65 struct mtx nfsrc_udpmtx; 66 struct mtx nfs_v4root_mutex; 67 struct nfsrvfh nfs_rootfh, nfs_pubfh; 68 int nfs_pubfhset = 0, nfs_rootfhset = 0; 69 struct proc *nfsd_master_proc = NULL; 70 static pid_t nfsd_master_pid = (pid_t)-1; 71 static char nfsd_master_comm[MAXCOMLEN + 1]; 72 static struct timeval nfsd_master_start; 73 static uint32_t nfsv4_sysid = 0; 74 75 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 76 struct ucred *); 77 78 int nfsrv_enable_crossmntpt = 1; 79 static int nfs_commit_blks; 80 static int nfs_commit_miss; 81 extern int nfsrv_issuedelegs; 82 extern int nfsrv_dolocallocks; 83 extern int nfsd_enable_stringtouid; 84 85 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server"); 86 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 87 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 88 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 89 0, ""); 90 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 91 0, ""); 92 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 93 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 94 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 95 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 96 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 97 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 98 99 #define MAX_REORDERED_RPC 16 100 #define NUM_HEURISTIC 1031 101 #define NHUSE_INIT 64 102 #define NHUSE_INC 16 103 #define NHUSE_MAX 2048 104 105 static struct nfsheur { 106 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 107 off_t nh_nextoff; /* next offset for sequential detection */ 108 int nh_use; /* use count for selection */ 109 int nh_seqcount; /* heuristic */ 110 } nfsheur[NUM_HEURISTIC]; 111 112 113 /* 114 * Heuristic to detect sequential operation. 115 */ 116 static struct nfsheur * 117 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 118 { 119 struct nfsheur *nh; 120 int hi, try; 121 122 /* Locate best candidate. */ 123 try = 32; 124 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 125 nh = &nfsheur[hi]; 126 while (try--) { 127 if (nfsheur[hi].nh_vp == vp) { 128 nh = &nfsheur[hi]; 129 break; 130 } 131 if (nfsheur[hi].nh_use > 0) 132 --nfsheur[hi].nh_use; 133 hi = (hi + 1) % NUM_HEURISTIC; 134 if (nfsheur[hi].nh_use < nh->nh_use) 135 nh = &nfsheur[hi]; 136 } 137 138 /* Initialize hint if this is a new file. */ 139 if (nh->nh_vp != vp) { 140 nh->nh_vp = vp; 141 nh->nh_nextoff = uio->uio_offset; 142 nh->nh_use = NHUSE_INIT; 143 if (uio->uio_offset == 0) 144 nh->nh_seqcount = 4; 145 else 146 nh->nh_seqcount = 1; 147 } 148 149 /* Calculate heuristic. */ 150 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 151 uio->uio_offset == nh->nh_nextoff) { 152 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 153 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 154 if (nh->nh_seqcount > IO_SEQMAX) 155 nh->nh_seqcount = IO_SEQMAX; 156 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 157 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 158 /* Probably a reordered RPC, leave seqcount alone. */ 159 } else if (nh->nh_seqcount > 1) { 160 nh->nh_seqcount /= 2; 161 } else { 162 nh->nh_seqcount = 0; 163 } 164 nh->nh_use += NHUSE_INC; 165 if (nh->nh_use > NHUSE_MAX) 166 nh->nh_use = NHUSE_MAX; 167 return (nh); 168 } 169 170 /* 171 * Get attributes into nfsvattr structure. 172 */ 173 int 174 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 175 struct thread *p, int vpislocked) 176 { 177 int error, lockedit = 0; 178 179 if (vpislocked == 0) { 180 /* 181 * When vpislocked == 0, the vnode is either exclusively 182 * locked by this thread or not locked by this thread. 183 * As such, shared lock it, if not exclusively locked. 184 */ 185 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 186 lockedit = 1; 187 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 188 } 189 } 190 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 191 if (lockedit != 0) 192 NFSVOPUNLOCK(vp, 0); 193 194 NFSEXITCODE(error); 195 return (error); 196 } 197 198 /* 199 * Get a file handle for a vnode. 200 */ 201 int 202 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 203 { 204 int error; 205 206 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 207 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 208 error = VOP_VPTOFH(vp, &fhp->fh_fid); 209 210 NFSEXITCODE(error); 211 return (error); 212 } 213 214 /* 215 * Perform access checking for vnodes obtained from file handles that would 216 * refer to files already opened by a Unix client. You cannot just use 217 * vn_writechk() and VOP_ACCESSX() for two reasons. 218 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 219 * case. 220 * 2 - The owner is to be given access irrespective of mode bits for some 221 * operations, so that processes that chmod after opening a file don't 222 * break. 223 */ 224 int 225 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 226 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 227 u_int32_t *supportedtypep) 228 { 229 struct vattr vattr; 230 int error = 0, getret = 0; 231 232 if (vpislocked == 0) { 233 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 234 error = EPERM; 235 goto out; 236 } 237 } 238 if (accmode & VWRITE) { 239 /* Just vn_writechk() changed to check rdonly */ 240 /* 241 * Disallow write attempts on read-only file systems; 242 * unless the file is a socket or a block or character 243 * device resident on the file system. 244 */ 245 if (NFSVNO_EXRDONLY(exp) || 246 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 247 switch (vp->v_type) { 248 case VREG: 249 case VDIR: 250 case VLNK: 251 error = EROFS; 252 default: 253 break; 254 } 255 } 256 /* 257 * If there's shared text associated with 258 * the inode, try to free it up once. If 259 * we fail, we can't allow writing. 260 */ 261 if (VOP_IS_TEXT(vp) && error == 0) 262 error = ETXTBSY; 263 } 264 if (error != 0) { 265 if (vpislocked == 0) 266 NFSVOPUNLOCK(vp, 0); 267 goto out; 268 } 269 270 /* 271 * Should the override still be applied when ACLs are enabled? 272 */ 273 error = VOP_ACCESSX(vp, accmode, cred, p); 274 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 275 /* 276 * Try again with VEXPLICIT_DENY, to see if the test for 277 * deletion is supported. 278 */ 279 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 280 if (error == 0) { 281 if (vp->v_type == VDIR) { 282 accmode &= ~(VDELETE | VDELETE_CHILD); 283 accmode |= VWRITE; 284 error = VOP_ACCESSX(vp, accmode, cred, p); 285 } else if (supportedtypep != NULL) { 286 *supportedtypep &= ~NFSACCESS_DELETE; 287 } 288 } 289 } 290 291 /* 292 * Allow certain operations for the owner (reads and writes 293 * on files that are already open). 294 */ 295 if (override != NFSACCCHK_NOOVERRIDE && 296 (error == EPERM || error == EACCES)) { 297 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 298 error = 0; 299 else if (override & NFSACCCHK_ALLOWOWNER) { 300 getret = VOP_GETATTR(vp, &vattr, cred); 301 if (getret == 0 && cred->cr_uid == vattr.va_uid) 302 error = 0; 303 } 304 } 305 if (vpislocked == 0) 306 NFSVOPUNLOCK(vp, 0); 307 308 out: 309 NFSEXITCODE(error); 310 return (error); 311 } 312 313 /* 314 * Set attribute(s) vnop. 315 */ 316 int 317 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 318 struct thread *p, struct nfsexstuff *exp) 319 { 320 int error; 321 322 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 323 NFSEXITCODE(error); 324 return (error); 325 } 326 327 /* 328 * Set up nameidata for a lookup() call and do it. 329 */ 330 int 331 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 332 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 333 struct vnode **retdirp) 334 { 335 struct componentname *cnp = &ndp->ni_cnd; 336 int i; 337 struct iovec aiov; 338 struct uio auio; 339 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 340 int error = 0, crossmnt; 341 char *cp; 342 343 *retdirp = NULL; 344 cnp->cn_nameptr = cnp->cn_pnbuf; 345 ndp->ni_strictrelative = 0; 346 /* 347 * Extract and set starting directory. 348 */ 349 if (dp->v_type != VDIR) { 350 if (islocked) 351 vput(dp); 352 else 353 vrele(dp); 354 nfsvno_relpathbuf(ndp); 355 error = ENOTDIR; 356 goto out1; 357 } 358 if (islocked) 359 NFSVOPUNLOCK(dp, 0); 360 VREF(dp); 361 *retdirp = dp; 362 if (NFSVNO_EXRDONLY(exp)) 363 cnp->cn_flags |= RDONLY; 364 ndp->ni_segflg = UIO_SYSSPACE; 365 crossmnt = 1; 366 367 if (nd->nd_flag & ND_PUBLOOKUP) { 368 ndp->ni_loopcnt = 0; 369 if (cnp->cn_pnbuf[0] == '/') { 370 vrele(dp); 371 /* 372 * Check for degenerate pathnames here, since lookup() 373 * panics on them. 374 */ 375 for (i = 1; i < ndp->ni_pathlen; i++) 376 if (cnp->cn_pnbuf[i] != '/') 377 break; 378 if (i == ndp->ni_pathlen) { 379 error = NFSERR_ACCES; 380 goto out; 381 } 382 dp = rootvnode; 383 VREF(dp); 384 } 385 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 386 (nd->nd_flag & ND_NFSV4) == 0) { 387 /* 388 * Only cross mount points for NFSv4 when doing a 389 * mount while traversing the file system above 390 * the mount point, unless nfsrv_enable_crossmntpt is set. 391 */ 392 cnp->cn_flags |= NOCROSSMOUNT; 393 crossmnt = 0; 394 } 395 396 /* 397 * Initialize for scan, set ni_startdir and bump ref on dp again 398 * because lookup() will dereference ni_startdir. 399 */ 400 401 cnp->cn_thread = p; 402 ndp->ni_startdir = dp; 403 ndp->ni_rootdir = rootvnode; 404 ndp->ni_topdir = NULL; 405 406 if (!lockleaf) 407 cnp->cn_flags |= LOCKLEAF; 408 for (;;) { 409 cnp->cn_nameptr = cnp->cn_pnbuf; 410 /* 411 * Call lookup() to do the real work. If an error occurs, 412 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 413 * we do not have to dereference anything before returning. 414 * In either case ni_startdir will be dereferenced and NULLed 415 * out. 416 */ 417 error = lookup(ndp); 418 if (error) 419 break; 420 421 /* 422 * Check for encountering a symbolic link. Trivial 423 * termination occurs if no symlink encountered. 424 */ 425 if ((cnp->cn_flags & ISSYMLINK) == 0) { 426 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 427 nfsvno_relpathbuf(ndp); 428 if (ndp->ni_vp && !lockleaf) 429 NFSVOPUNLOCK(ndp->ni_vp, 0); 430 break; 431 } 432 433 /* 434 * Validate symlink 435 */ 436 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 437 NFSVOPUNLOCK(ndp->ni_dvp, 0); 438 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 439 error = EINVAL; 440 goto badlink2; 441 } 442 443 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 444 error = ELOOP; 445 goto badlink2; 446 } 447 if (ndp->ni_pathlen > 1) 448 cp = uma_zalloc(namei_zone, M_WAITOK); 449 else 450 cp = cnp->cn_pnbuf; 451 aiov.iov_base = cp; 452 aiov.iov_len = MAXPATHLEN; 453 auio.uio_iov = &aiov; 454 auio.uio_iovcnt = 1; 455 auio.uio_offset = 0; 456 auio.uio_rw = UIO_READ; 457 auio.uio_segflg = UIO_SYSSPACE; 458 auio.uio_td = NULL; 459 auio.uio_resid = MAXPATHLEN; 460 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 461 if (error) { 462 badlink1: 463 if (ndp->ni_pathlen > 1) 464 uma_zfree(namei_zone, cp); 465 badlink2: 466 vrele(ndp->ni_dvp); 467 vput(ndp->ni_vp); 468 break; 469 } 470 linklen = MAXPATHLEN - auio.uio_resid; 471 if (linklen == 0) { 472 error = ENOENT; 473 goto badlink1; 474 } 475 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 476 error = ENAMETOOLONG; 477 goto badlink1; 478 } 479 480 /* 481 * Adjust or replace path 482 */ 483 if (ndp->ni_pathlen > 1) { 484 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 485 uma_zfree(namei_zone, cnp->cn_pnbuf); 486 cnp->cn_pnbuf = cp; 487 } else 488 cnp->cn_pnbuf[linklen] = '\0'; 489 ndp->ni_pathlen += linklen; 490 491 /* 492 * Cleanup refs for next loop and check if root directory 493 * should replace current directory. Normally ni_dvp 494 * becomes the new base directory and is cleaned up when 495 * we loop. Explicitly null pointers after invalidation 496 * to clarify operation. 497 */ 498 vput(ndp->ni_vp); 499 ndp->ni_vp = NULL; 500 501 if (cnp->cn_pnbuf[0] == '/') { 502 vrele(ndp->ni_dvp); 503 ndp->ni_dvp = ndp->ni_rootdir; 504 VREF(ndp->ni_dvp); 505 } 506 ndp->ni_startdir = ndp->ni_dvp; 507 ndp->ni_dvp = NULL; 508 } 509 if (!lockleaf) 510 cnp->cn_flags &= ~LOCKLEAF; 511 512 out: 513 if (error) { 514 nfsvno_relpathbuf(ndp); 515 ndp->ni_vp = NULL; 516 ndp->ni_dvp = NULL; 517 ndp->ni_startdir = NULL; 518 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 519 ndp->ni_dvp = NULL; 520 } 521 522 out1: 523 NFSEXITCODE2(error, nd); 524 return (error); 525 } 526 527 /* 528 * Set up a pathname buffer and return a pointer to it and, optionally 529 * set a hash pointer. 530 */ 531 void 532 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 533 { 534 struct componentname *cnp = &ndp->ni_cnd; 535 536 cnp->cn_flags |= (NOMACCHECK | HASBUF); 537 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 538 if (hashpp != NULL) 539 *hashpp = NULL; 540 *bufpp = cnp->cn_pnbuf; 541 } 542 543 /* 544 * Release the above path buffer, if not released by nfsvno_namei(). 545 */ 546 void 547 nfsvno_relpathbuf(struct nameidata *ndp) 548 { 549 550 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 551 panic("nfsrelpath"); 552 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 553 ndp->ni_cnd.cn_flags &= ~HASBUF; 554 } 555 556 /* 557 * Readlink vnode op into an mbuf list. 558 */ 559 int 560 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 561 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 562 { 563 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 564 struct iovec *ivp = iv; 565 struct uio io, *uiop = &io; 566 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 567 int i, len, tlen, error = 0; 568 569 len = 0; 570 i = 0; 571 while (len < NFS_MAXPATHLEN) { 572 NFSMGET(mp); 573 MCLGET(mp, M_WAITOK); 574 mp->m_len = NFSMSIZ(mp); 575 if (len == 0) { 576 mp3 = mp2 = mp; 577 } else { 578 mp2->m_next = mp; 579 mp2 = mp; 580 } 581 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 582 mp->m_len = NFS_MAXPATHLEN - len; 583 len = NFS_MAXPATHLEN; 584 } else { 585 len += mp->m_len; 586 } 587 ivp->iov_base = mtod(mp, caddr_t); 588 ivp->iov_len = mp->m_len; 589 i++; 590 ivp++; 591 } 592 uiop->uio_iov = iv; 593 uiop->uio_iovcnt = i; 594 uiop->uio_offset = 0; 595 uiop->uio_resid = len; 596 uiop->uio_rw = UIO_READ; 597 uiop->uio_segflg = UIO_SYSSPACE; 598 uiop->uio_td = NULL; 599 error = VOP_READLINK(vp, uiop, cred); 600 if (error) { 601 m_freem(mp3); 602 *lenp = 0; 603 goto out; 604 } 605 if (uiop->uio_resid > 0) { 606 len -= uiop->uio_resid; 607 tlen = NFSM_RNDUP(len); 608 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 609 } 610 *lenp = len; 611 *mpp = mp3; 612 *mpendp = mp; 613 614 out: 615 NFSEXITCODE(error); 616 return (error); 617 } 618 619 /* 620 * Read vnode op call into mbuf list. 621 */ 622 int 623 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 624 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 625 { 626 struct mbuf *m; 627 int i; 628 struct iovec *iv; 629 struct iovec *iv2; 630 int error = 0, len, left, siz, tlen, ioflag = 0; 631 struct mbuf *m2 = NULL, *m3; 632 struct uio io, *uiop = &io; 633 struct nfsheur *nh; 634 635 len = left = NFSM_RNDUP(cnt); 636 m3 = NULL; 637 /* 638 * Generate the mbuf list with the uio_iov ref. to it. 639 */ 640 i = 0; 641 while (left > 0) { 642 NFSMGET(m); 643 MCLGET(m, M_WAITOK); 644 m->m_len = 0; 645 siz = min(M_TRAILINGSPACE(m), left); 646 left -= siz; 647 i++; 648 if (m3) 649 m2->m_next = m; 650 else 651 m3 = m; 652 m2 = m; 653 } 654 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 655 M_TEMP, M_WAITOK); 656 uiop->uio_iov = iv2 = iv; 657 m = m3; 658 left = len; 659 i = 0; 660 while (left > 0) { 661 if (m == NULL) 662 panic("nfsvno_read iov"); 663 siz = min(M_TRAILINGSPACE(m), left); 664 if (siz > 0) { 665 iv->iov_base = mtod(m, caddr_t) + m->m_len; 666 iv->iov_len = siz; 667 m->m_len += siz; 668 left -= siz; 669 iv++; 670 i++; 671 } 672 m = m->m_next; 673 } 674 uiop->uio_iovcnt = i; 675 uiop->uio_offset = off; 676 uiop->uio_resid = len; 677 uiop->uio_rw = UIO_READ; 678 uiop->uio_segflg = UIO_SYSSPACE; 679 uiop->uio_td = NULL; 680 nh = nfsrv_sequential_heuristic(uiop, vp); 681 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 682 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 683 FREE((caddr_t)iv2, M_TEMP); 684 if (error) { 685 m_freem(m3); 686 *mpp = NULL; 687 goto out; 688 } 689 nh->nh_nextoff = uiop->uio_offset; 690 tlen = len - uiop->uio_resid; 691 cnt = cnt < tlen ? cnt : tlen; 692 tlen = NFSM_RNDUP(cnt); 693 if (tlen == 0) { 694 m_freem(m3); 695 m3 = NULL; 696 } else if (len != tlen || tlen != cnt) 697 nfsrv_adj(m3, len - tlen, tlen - cnt); 698 *mpp = m3; 699 *mpendp = m2; 700 701 out: 702 NFSEXITCODE(error); 703 return (error); 704 } 705 706 /* 707 * Write vnode op from an mbuf list. 708 */ 709 int 710 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 711 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 712 { 713 struct iovec *ivp; 714 int i, len; 715 struct iovec *iv; 716 int ioflags, error; 717 struct uio io, *uiop = &io; 718 struct nfsheur *nh; 719 720 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 721 M_WAITOK); 722 uiop->uio_iov = iv = ivp; 723 uiop->uio_iovcnt = cnt; 724 i = mtod(mp, caddr_t) + mp->m_len - cp; 725 len = retlen; 726 while (len > 0) { 727 if (mp == NULL) 728 panic("nfsvno_write"); 729 if (i > 0) { 730 i = min(i, len); 731 ivp->iov_base = cp; 732 ivp->iov_len = i; 733 ivp++; 734 len -= i; 735 } 736 mp = mp->m_next; 737 if (mp) { 738 i = mp->m_len; 739 cp = mtod(mp, caddr_t); 740 } 741 } 742 743 if (stable == NFSWRITE_UNSTABLE) 744 ioflags = IO_NODELOCKED; 745 else 746 ioflags = (IO_SYNC | IO_NODELOCKED); 747 uiop->uio_resid = retlen; 748 uiop->uio_rw = UIO_WRITE; 749 uiop->uio_segflg = UIO_SYSSPACE; 750 NFSUIOPROC(uiop, p); 751 uiop->uio_offset = off; 752 nh = nfsrv_sequential_heuristic(uiop, vp); 753 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 754 error = VOP_WRITE(vp, uiop, ioflags, cred); 755 if (error == 0) 756 nh->nh_nextoff = uiop->uio_offset; 757 FREE((caddr_t)iv, M_TEMP); 758 759 NFSEXITCODE(error); 760 return (error); 761 } 762 763 /* 764 * Common code for creating a regular file (plus special files for V2). 765 */ 766 int 767 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 768 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 769 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 770 { 771 u_quad_t tempsize; 772 int error; 773 774 error = nd->nd_repstat; 775 if (!error && ndp->ni_vp == NULL) { 776 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 777 vrele(ndp->ni_startdir); 778 error = VOP_CREATE(ndp->ni_dvp, 779 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 780 vput(ndp->ni_dvp); 781 nfsvno_relpathbuf(ndp); 782 if (!error) { 783 if (*exclusive_flagp) { 784 *exclusive_flagp = 0; 785 NFSVNO_ATTRINIT(nvap); 786 nvap->na_atime.tv_sec = cverf[0]; 787 nvap->na_atime.tv_nsec = cverf[1]; 788 error = VOP_SETATTR(ndp->ni_vp, 789 &nvap->na_vattr, nd->nd_cred); 790 } 791 } 792 /* 793 * NFS V2 Only. nfsrvd_mknod() does this for V3. 794 * (This implies, just get out on an error.) 795 */ 796 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 797 nvap->na_type == VFIFO) { 798 if (nvap->na_type == VCHR && rdev == 0xffffffff) 799 nvap->na_type = VFIFO; 800 if (nvap->na_type != VFIFO && 801 (error = priv_check_cred(nd->nd_cred, 802 PRIV_VFS_MKNOD_DEV, 0))) { 803 vrele(ndp->ni_startdir); 804 nfsvno_relpathbuf(ndp); 805 vput(ndp->ni_dvp); 806 goto out; 807 } 808 nvap->na_rdev = rdev; 809 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 810 &ndp->ni_cnd, &nvap->na_vattr); 811 vput(ndp->ni_dvp); 812 nfsvno_relpathbuf(ndp); 813 vrele(ndp->ni_startdir); 814 if (error) 815 goto out; 816 } else { 817 vrele(ndp->ni_startdir); 818 nfsvno_relpathbuf(ndp); 819 vput(ndp->ni_dvp); 820 error = ENXIO; 821 goto out; 822 } 823 *vpp = ndp->ni_vp; 824 } else { 825 /* 826 * Handle cases where error is already set and/or 827 * the file exists. 828 * 1 - clean up the lookup 829 * 2 - iff !error and na_size set, truncate it 830 */ 831 vrele(ndp->ni_startdir); 832 nfsvno_relpathbuf(ndp); 833 *vpp = ndp->ni_vp; 834 if (ndp->ni_dvp == *vpp) 835 vrele(ndp->ni_dvp); 836 else 837 vput(ndp->ni_dvp); 838 if (!error && nvap->na_size != VNOVAL) { 839 error = nfsvno_accchk(*vpp, VWRITE, 840 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 841 NFSACCCHK_VPISLOCKED, NULL); 842 if (!error) { 843 tempsize = nvap->na_size; 844 NFSVNO_ATTRINIT(nvap); 845 nvap->na_size = tempsize; 846 error = VOP_SETATTR(*vpp, 847 &nvap->na_vattr, nd->nd_cred); 848 } 849 } 850 if (error) 851 vput(*vpp); 852 } 853 854 out: 855 NFSEXITCODE(error); 856 return (error); 857 } 858 859 /* 860 * Do a mknod vnode op. 861 */ 862 int 863 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 864 struct thread *p) 865 { 866 int error = 0; 867 enum vtype vtyp; 868 869 vtyp = nvap->na_type; 870 /* 871 * Iff doesn't exist, create it. 872 */ 873 if (ndp->ni_vp) { 874 vrele(ndp->ni_startdir); 875 nfsvno_relpathbuf(ndp); 876 vput(ndp->ni_dvp); 877 vrele(ndp->ni_vp); 878 error = EEXIST; 879 goto out; 880 } 881 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 882 vrele(ndp->ni_startdir); 883 nfsvno_relpathbuf(ndp); 884 vput(ndp->ni_dvp); 885 error = NFSERR_BADTYPE; 886 goto out; 887 } 888 if (vtyp == VSOCK) { 889 vrele(ndp->ni_startdir); 890 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 891 &ndp->ni_cnd, &nvap->na_vattr); 892 vput(ndp->ni_dvp); 893 nfsvno_relpathbuf(ndp); 894 } else { 895 if (nvap->na_type != VFIFO && 896 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 897 vrele(ndp->ni_startdir); 898 nfsvno_relpathbuf(ndp); 899 vput(ndp->ni_dvp); 900 goto out; 901 } 902 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 903 &ndp->ni_cnd, &nvap->na_vattr); 904 vput(ndp->ni_dvp); 905 nfsvno_relpathbuf(ndp); 906 vrele(ndp->ni_startdir); 907 /* 908 * Since VOP_MKNOD returns the ni_vp, I can't 909 * see any reason to do the lookup. 910 */ 911 } 912 913 out: 914 NFSEXITCODE(error); 915 return (error); 916 } 917 918 /* 919 * Mkdir vnode op. 920 */ 921 int 922 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 923 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 924 { 925 int error = 0; 926 927 if (ndp->ni_vp != NULL) { 928 if (ndp->ni_dvp == ndp->ni_vp) 929 vrele(ndp->ni_dvp); 930 else 931 vput(ndp->ni_dvp); 932 vrele(ndp->ni_vp); 933 nfsvno_relpathbuf(ndp); 934 error = EEXIST; 935 goto out; 936 } 937 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 938 &nvap->na_vattr); 939 vput(ndp->ni_dvp); 940 nfsvno_relpathbuf(ndp); 941 942 out: 943 NFSEXITCODE(error); 944 return (error); 945 } 946 947 /* 948 * symlink vnode op. 949 */ 950 int 951 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 952 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 953 struct nfsexstuff *exp) 954 { 955 int error = 0; 956 957 if (ndp->ni_vp) { 958 vrele(ndp->ni_startdir); 959 nfsvno_relpathbuf(ndp); 960 if (ndp->ni_dvp == ndp->ni_vp) 961 vrele(ndp->ni_dvp); 962 else 963 vput(ndp->ni_dvp); 964 vrele(ndp->ni_vp); 965 error = EEXIST; 966 goto out; 967 } 968 969 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 970 &nvap->na_vattr, pathcp); 971 vput(ndp->ni_dvp); 972 vrele(ndp->ni_startdir); 973 nfsvno_relpathbuf(ndp); 974 /* 975 * Although FreeBSD still had the lookup code in 976 * it for 7/current, there doesn't seem to be any 977 * point, since VOP_SYMLINK() returns the ni_vp. 978 * Just vput it for v2. 979 */ 980 if (!not_v2 && !error) 981 vput(ndp->ni_vp); 982 983 out: 984 NFSEXITCODE(error); 985 return (error); 986 } 987 988 /* 989 * Parse symbolic link arguments. 990 * This function has an ugly side effect. It will MALLOC() an area for 991 * the symlink and set iov_base to point to it, only if it succeeds. 992 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 993 * be FREE'd later. 994 */ 995 int 996 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 997 struct thread *p, char **pathcpp, int *lenp) 998 { 999 u_int32_t *tl; 1000 char *pathcp = NULL; 1001 int error = 0, len; 1002 struct nfsv2_sattr *sp; 1003 1004 *pathcpp = NULL; 1005 *lenp = 0; 1006 if ((nd->nd_flag & ND_NFSV3) && 1007 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p))) 1008 goto nfsmout; 1009 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1010 len = fxdr_unsigned(int, *tl); 1011 if (len > NFS_MAXPATHLEN || len <= 0) { 1012 error = EBADRPC; 1013 goto nfsmout; 1014 } 1015 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1016 error = nfsrv_mtostr(nd, pathcp, len); 1017 if (error) 1018 goto nfsmout; 1019 if (nd->nd_flag & ND_NFSV2) { 1020 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1021 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1022 } 1023 *pathcpp = pathcp; 1024 *lenp = len; 1025 NFSEXITCODE2(0, nd); 1026 return (0); 1027 nfsmout: 1028 if (pathcp) 1029 free(pathcp, M_TEMP); 1030 NFSEXITCODE2(error, nd); 1031 return (error); 1032 } 1033 1034 /* 1035 * Remove a non-directory object. 1036 */ 1037 int 1038 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1039 struct thread *p, struct nfsexstuff *exp) 1040 { 1041 struct vnode *vp; 1042 int error = 0; 1043 1044 vp = ndp->ni_vp; 1045 if (vp->v_type == VDIR) 1046 error = NFSERR_ISDIR; 1047 else if (is_v4) 1048 error = nfsrv_checkremove(vp, 1, p); 1049 if (!error) 1050 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1051 if (ndp->ni_dvp == vp) 1052 vrele(ndp->ni_dvp); 1053 else 1054 vput(ndp->ni_dvp); 1055 vput(vp); 1056 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1057 nfsvno_relpathbuf(ndp); 1058 NFSEXITCODE(error); 1059 return (error); 1060 } 1061 1062 /* 1063 * Remove a directory. 1064 */ 1065 int 1066 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1067 struct thread *p, struct nfsexstuff *exp) 1068 { 1069 struct vnode *vp; 1070 int error = 0; 1071 1072 vp = ndp->ni_vp; 1073 if (vp->v_type != VDIR) { 1074 error = ENOTDIR; 1075 goto out; 1076 } 1077 /* 1078 * No rmdir "." please. 1079 */ 1080 if (ndp->ni_dvp == vp) { 1081 error = EINVAL; 1082 goto out; 1083 } 1084 /* 1085 * The root of a mounted filesystem cannot be deleted. 1086 */ 1087 if (vp->v_vflag & VV_ROOT) 1088 error = EBUSY; 1089 out: 1090 if (!error) 1091 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1092 if (ndp->ni_dvp == vp) 1093 vrele(ndp->ni_dvp); 1094 else 1095 vput(ndp->ni_dvp); 1096 vput(vp); 1097 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1098 nfsvno_relpathbuf(ndp); 1099 NFSEXITCODE(error); 1100 return (error); 1101 } 1102 1103 /* 1104 * Rename vnode op. 1105 */ 1106 int 1107 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1108 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1109 { 1110 struct vnode *fvp, *tvp, *tdvp; 1111 int error = 0; 1112 1113 fvp = fromndp->ni_vp; 1114 if (ndstat) { 1115 vrele(fromndp->ni_dvp); 1116 vrele(fvp); 1117 error = ndstat; 1118 goto out1; 1119 } 1120 tdvp = tondp->ni_dvp; 1121 tvp = tondp->ni_vp; 1122 if (tvp != NULL) { 1123 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1124 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1125 goto out; 1126 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1127 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1128 goto out; 1129 } 1130 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1131 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1132 goto out; 1133 } 1134 1135 /* 1136 * A rename to '.' or '..' results in a prematurely 1137 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1138 * here. 1139 */ 1140 if ((tondp->ni_cnd.cn_namelen == 1 && 1141 tondp->ni_cnd.cn_nameptr[0] == '.') || 1142 (tondp->ni_cnd.cn_namelen == 2 && 1143 tondp->ni_cnd.cn_nameptr[0] == '.' && 1144 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1145 error = EINVAL; 1146 goto out; 1147 } 1148 } 1149 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1150 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1151 goto out; 1152 } 1153 if (fvp->v_mount != tdvp->v_mount) { 1154 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1155 goto out; 1156 } 1157 if (fvp == tdvp) { 1158 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1159 goto out; 1160 } 1161 if (fvp == tvp) { 1162 /* 1163 * If source and destination are the same, there is nothing to 1164 * do. Set error to -1 to indicate this. 1165 */ 1166 error = -1; 1167 goto out; 1168 } 1169 if (ndflag & ND_NFSV4) { 1170 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1171 error = nfsrv_checkremove(fvp, 0, p); 1172 NFSVOPUNLOCK(fvp, 0); 1173 } else 1174 error = EPERM; 1175 if (tvp && !error) 1176 error = nfsrv_checkremove(tvp, 1, p); 1177 } else { 1178 /* 1179 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1180 * that the NFSv4 client won't be confused by the rename. 1181 * Since nfsd_recalldelegation() can only be called on an 1182 * unlocked vnode at this point and fvp is the file that will 1183 * still exist after the rename, just do fvp. 1184 */ 1185 nfsd_recalldelegation(fvp, p); 1186 } 1187 out: 1188 if (!error) { 1189 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1190 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1191 &tondp->ni_cnd); 1192 } else { 1193 if (tdvp == tvp) 1194 vrele(tdvp); 1195 else 1196 vput(tdvp); 1197 if (tvp) 1198 vput(tvp); 1199 vrele(fromndp->ni_dvp); 1200 vrele(fvp); 1201 if (error == -1) 1202 error = 0; 1203 } 1204 vrele(tondp->ni_startdir); 1205 nfsvno_relpathbuf(tondp); 1206 out1: 1207 vrele(fromndp->ni_startdir); 1208 nfsvno_relpathbuf(fromndp); 1209 NFSEXITCODE(error); 1210 return (error); 1211 } 1212 1213 /* 1214 * Link vnode op. 1215 */ 1216 int 1217 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1218 struct thread *p, struct nfsexstuff *exp) 1219 { 1220 struct vnode *xp; 1221 int error = 0; 1222 1223 xp = ndp->ni_vp; 1224 if (xp != NULL) { 1225 error = EEXIST; 1226 } else { 1227 xp = ndp->ni_dvp; 1228 if (vp->v_mount != xp->v_mount) 1229 error = EXDEV; 1230 } 1231 if (!error) { 1232 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1233 if ((vp->v_iflag & VI_DOOMED) == 0) 1234 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1235 else 1236 error = EPERM; 1237 if (ndp->ni_dvp == vp) 1238 vrele(ndp->ni_dvp); 1239 else 1240 vput(ndp->ni_dvp); 1241 NFSVOPUNLOCK(vp, 0); 1242 } else { 1243 if (ndp->ni_dvp == ndp->ni_vp) 1244 vrele(ndp->ni_dvp); 1245 else 1246 vput(ndp->ni_dvp); 1247 if (ndp->ni_vp) 1248 vrele(ndp->ni_vp); 1249 } 1250 nfsvno_relpathbuf(ndp); 1251 NFSEXITCODE(error); 1252 return (error); 1253 } 1254 1255 /* 1256 * Do the fsync() appropriate for the commit. 1257 */ 1258 int 1259 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1260 struct thread *td) 1261 { 1262 int error = 0; 1263 1264 /* 1265 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1266 * file is done. At this time VOP_FSYNC does not accept offset and 1267 * byte count parameters so call VOP_FSYNC the whole file for now. 1268 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1269 */ 1270 if (cnt == 0 || cnt > MAX_COMMIT_COUNT) { 1271 /* 1272 * Give up and do the whole thing 1273 */ 1274 if (vp->v_object && 1275 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1276 VM_OBJECT_WLOCK(vp->v_object); 1277 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1278 VM_OBJECT_WUNLOCK(vp->v_object); 1279 } 1280 error = VOP_FSYNC(vp, MNT_WAIT, td); 1281 } else { 1282 /* 1283 * Locate and synchronously write any buffers that fall 1284 * into the requested range. Note: we are assuming that 1285 * f_iosize is a power of 2. 1286 */ 1287 int iosize = vp->v_mount->mnt_stat.f_iosize; 1288 int iomask = iosize - 1; 1289 struct bufobj *bo; 1290 daddr_t lblkno; 1291 1292 /* 1293 * Align to iosize boundry, super-align to page boundry. 1294 */ 1295 if (off & iomask) { 1296 cnt += off & iomask; 1297 off &= ~(u_quad_t)iomask; 1298 } 1299 if (off & PAGE_MASK) { 1300 cnt += off & PAGE_MASK; 1301 off &= ~(u_quad_t)PAGE_MASK; 1302 } 1303 lblkno = off / iosize; 1304 1305 if (vp->v_object && 1306 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1307 VM_OBJECT_WLOCK(vp->v_object); 1308 vm_object_page_clean(vp->v_object, off, off + cnt, 1309 OBJPC_SYNC); 1310 VM_OBJECT_WUNLOCK(vp->v_object); 1311 } 1312 1313 bo = &vp->v_bufobj; 1314 BO_LOCK(bo); 1315 while (cnt > 0) { 1316 struct buf *bp; 1317 1318 /* 1319 * If we have a buffer and it is marked B_DELWRI we 1320 * have to lock and write it. Otherwise the prior 1321 * write is assumed to have already been committed. 1322 * 1323 * gbincore() can return invalid buffers now so we 1324 * have to check that bit as well (though B_DELWRI 1325 * should not be set if B_INVAL is set there could be 1326 * a race here since we haven't locked the buffer). 1327 */ 1328 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1329 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1330 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1331 BO_LOCK(bo); 1332 continue; /* retry */ 1333 } 1334 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1335 B_DELWRI) { 1336 bremfree(bp); 1337 bp->b_flags &= ~B_ASYNC; 1338 bwrite(bp); 1339 ++nfs_commit_miss; 1340 } else 1341 BUF_UNLOCK(bp); 1342 BO_LOCK(bo); 1343 } 1344 ++nfs_commit_blks; 1345 if (cnt < iosize) 1346 break; 1347 cnt -= iosize; 1348 ++lblkno; 1349 } 1350 BO_UNLOCK(bo); 1351 } 1352 NFSEXITCODE(error); 1353 return (error); 1354 } 1355 1356 /* 1357 * Statfs vnode op. 1358 */ 1359 int 1360 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1361 { 1362 int error; 1363 1364 error = VFS_STATFS(vp->v_mount, sf); 1365 if (error == 0) { 1366 /* 1367 * Since NFS handles these values as unsigned on the 1368 * wire, there is no way to represent negative values, 1369 * so set them to 0. Without this, they will appear 1370 * to be very large positive values for clients like 1371 * Solaris10. 1372 */ 1373 if (sf->f_bavail < 0) 1374 sf->f_bavail = 0; 1375 if (sf->f_ffree < 0) 1376 sf->f_ffree = 0; 1377 } 1378 NFSEXITCODE(error); 1379 return (error); 1380 } 1381 1382 /* 1383 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1384 * must handle nfsrv_opencheck() calls after any other access checks. 1385 */ 1386 void 1387 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1388 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1389 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1390 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1391 struct nfsexstuff *exp, struct vnode **vpp) 1392 { 1393 struct vnode *vp = NULL; 1394 u_quad_t tempsize; 1395 struct nfsexstuff nes; 1396 1397 if (ndp->ni_vp == NULL) 1398 nd->nd_repstat = nfsrv_opencheck(clientid, 1399 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1400 if (!nd->nd_repstat) { 1401 if (ndp->ni_vp == NULL) { 1402 vrele(ndp->ni_startdir); 1403 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1404 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1405 vput(ndp->ni_dvp); 1406 nfsvno_relpathbuf(ndp); 1407 if (!nd->nd_repstat) { 1408 if (*exclusive_flagp) { 1409 *exclusive_flagp = 0; 1410 NFSVNO_ATTRINIT(nvap); 1411 nvap->na_atime.tv_sec = cverf[0]; 1412 nvap->na_atime.tv_nsec = cverf[1]; 1413 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1414 &nvap->na_vattr, cred); 1415 } else { 1416 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1417 aclp, p, attrbitp, exp); 1418 } 1419 } 1420 vp = ndp->ni_vp; 1421 } else { 1422 if (ndp->ni_startdir) 1423 vrele(ndp->ni_startdir); 1424 nfsvno_relpathbuf(ndp); 1425 vp = ndp->ni_vp; 1426 if (create == NFSV4OPEN_CREATE) { 1427 if (ndp->ni_dvp == vp) 1428 vrele(ndp->ni_dvp); 1429 else 1430 vput(ndp->ni_dvp); 1431 } 1432 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1433 if (ndp->ni_cnd.cn_flags & RDONLY) 1434 NFSVNO_SETEXRDONLY(&nes); 1435 else 1436 NFSVNO_EXINIT(&nes); 1437 nd->nd_repstat = nfsvno_accchk(vp, 1438 VWRITE, cred, &nes, p, 1439 NFSACCCHK_NOOVERRIDE, 1440 NFSACCCHK_VPISLOCKED, NULL); 1441 nd->nd_repstat = nfsrv_opencheck(clientid, 1442 stateidp, stp, vp, nd, p, nd->nd_repstat); 1443 if (!nd->nd_repstat) { 1444 tempsize = nvap->na_size; 1445 NFSVNO_ATTRINIT(nvap); 1446 nvap->na_size = tempsize; 1447 nd->nd_repstat = VOP_SETATTR(vp, 1448 &nvap->na_vattr, cred); 1449 } 1450 } else if (vp->v_type == VREG) { 1451 nd->nd_repstat = nfsrv_opencheck(clientid, 1452 stateidp, stp, vp, nd, p, nd->nd_repstat); 1453 } 1454 } 1455 } else { 1456 if (ndp->ni_cnd.cn_flags & HASBUF) 1457 nfsvno_relpathbuf(ndp); 1458 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1459 vrele(ndp->ni_startdir); 1460 if (ndp->ni_dvp == ndp->ni_vp) 1461 vrele(ndp->ni_dvp); 1462 else 1463 vput(ndp->ni_dvp); 1464 if (ndp->ni_vp) 1465 vput(ndp->ni_vp); 1466 } 1467 } 1468 *vpp = vp; 1469 1470 NFSEXITCODE2(0, nd); 1471 } 1472 1473 /* 1474 * Updates the file rev and sets the mtime and ctime 1475 * to the current clock time, returning the va_filerev and va_Xtime 1476 * values. 1477 * Return ESTALE to indicate the vnode is VI_DOOMED. 1478 */ 1479 int 1480 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1481 struct ucred *cred, struct thread *p) 1482 { 1483 struct vattr va; 1484 1485 VATTR_NULL(&va); 1486 vfs_timestamp(&va.va_mtime); 1487 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1488 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1489 if ((vp->v_iflag & VI_DOOMED) != 0) 1490 return (ESTALE); 1491 } 1492 (void) VOP_SETATTR(vp, &va, cred); 1493 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1494 return (0); 1495 } 1496 1497 /* 1498 * Glue routine to nfsv4_fillattr(). 1499 */ 1500 int 1501 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1502 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1503 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1504 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1505 { 1506 int error; 1507 1508 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1509 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1510 mounted_on_fileno); 1511 NFSEXITCODE2(0, nd); 1512 return (error); 1513 } 1514 1515 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1516 /* 1517 * nfs readdir service 1518 * - mallocs what it thinks is enough to read 1519 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1520 * - calls VOP_READDIR() 1521 * - loops around building the reply 1522 * if the output generated exceeds count break out of loop 1523 * The NFSM_CLGET macro is used here so that the reply will be packed 1524 * tightly in mbuf clusters. 1525 * - it trims out records with d_fileno == 0 1526 * this doesn't matter for Unix clients, but they might confuse clients 1527 * for other os'. 1528 * - it trims out records with d_type == DT_WHT 1529 * these cannot be seen through NFS (unless we extend the protocol) 1530 * The alternate call nfsrvd_readdirplus() does lookups as well. 1531 * PS: The NFS protocol spec. does not clarify what the "count" byte 1532 * argument is a count of.. just name strings and file id's or the 1533 * entire reply rpc or ... 1534 * I tried just file name and id sizes and it confused the Sun client, 1535 * so I am using the full rpc size now. The "paranoia.." comment refers 1536 * to including the status longwords that are not a part of the dir. 1537 * "entry" structures, but are in the rpc. 1538 */ 1539 int 1540 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1541 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1542 { 1543 struct dirent *dp; 1544 u_int32_t *tl; 1545 int dirlen; 1546 char *cpos, *cend, *rbuf; 1547 struct nfsvattr at; 1548 int nlen, error = 0, getret = 1; 1549 int siz, cnt, fullsiz, eofflag, ncookies; 1550 u_int64_t off, toff, verf; 1551 u_long *cookies = NULL, *cookiep; 1552 struct uio io; 1553 struct iovec iv; 1554 int not_zfs; 1555 1556 if (nd->nd_repstat) { 1557 nfsrv_postopattr(nd, getret, &at); 1558 goto out; 1559 } 1560 if (nd->nd_flag & ND_NFSV2) { 1561 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1562 off = fxdr_unsigned(u_quad_t, *tl++); 1563 } else { 1564 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1565 off = fxdr_hyper(tl); 1566 tl += 2; 1567 verf = fxdr_hyper(tl); 1568 tl += 2; 1569 } 1570 toff = off; 1571 cnt = fxdr_unsigned(int, *tl); 1572 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1573 cnt = NFS_SRVMAXDATA(nd); 1574 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1575 fullsiz = siz; 1576 if (nd->nd_flag & ND_NFSV3) { 1577 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1578 p, 1); 1579 #if 0 1580 /* 1581 * va_filerev is not sufficient as a cookie verifier, 1582 * since it is not supposed to change when entries are 1583 * removed/added unless that offset cookies returned to 1584 * the client are no longer valid. 1585 */ 1586 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1587 nd->nd_repstat = NFSERR_BAD_COOKIE; 1588 #endif 1589 } 1590 if (!nd->nd_repstat && vp->v_type != VDIR) 1591 nd->nd_repstat = NFSERR_NOTDIR; 1592 if (nd->nd_repstat == 0 && cnt == 0) { 1593 if (nd->nd_flag & ND_NFSV2) 1594 /* NFSv2 does not have NFSERR_TOOSMALL */ 1595 nd->nd_repstat = EPERM; 1596 else 1597 nd->nd_repstat = NFSERR_TOOSMALL; 1598 } 1599 if (!nd->nd_repstat) 1600 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1601 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1602 NFSACCCHK_VPISLOCKED, NULL); 1603 if (nd->nd_repstat) { 1604 vput(vp); 1605 if (nd->nd_flag & ND_NFSV3) 1606 nfsrv_postopattr(nd, getret, &at); 1607 goto out; 1608 } 1609 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1610 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1611 again: 1612 eofflag = 0; 1613 if (cookies) { 1614 free((caddr_t)cookies, M_TEMP); 1615 cookies = NULL; 1616 } 1617 1618 iv.iov_base = rbuf; 1619 iv.iov_len = siz; 1620 io.uio_iov = &iv; 1621 io.uio_iovcnt = 1; 1622 io.uio_offset = (off_t)off; 1623 io.uio_resid = siz; 1624 io.uio_segflg = UIO_SYSSPACE; 1625 io.uio_rw = UIO_READ; 1626 io.uio_td = NULL; 1627 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1628 &cookies); 1629 off = (u_int64_t)io.uio_offset; 1630 if (io.uio_resid) 1631 siz -= io.uio_resid; 1632 1633 if (!cookies && !nd->nd_repstat) 1634 nd->nd_repstat = NFSERR_PERM; 1635 if (nd->nd_flag & ND_NFSV3) { 1636 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1637 if (!nd->nd_repstat) 1638 nd->nd_repstat = getret; 1639 } 1640 1641 /* 1642 * Handles the failed cases. nd->nd_repstat == 0 past here. 1643 */ 1644 if (nd->nd_repstat) { 1645 vput(vp); 1646 free((caddr_t)rbuf, M_TEMP); 1647 if (cookies) 1648 free((caddr_t)cookies, M_TEMP); 1649 if (nd->nd_flag & ND_NFSV3) 1650 nfsrv_postopattr(nd, getret, &at); 1651 goto out; 1652 } 1653 /* 1654 * If nothing read, return eof 1655 * rpc reply 1656 */ 1657 if (siz == 0) { 1658 vput(vp); 1659 if (nd->nd_flag & ND_NFSV2) { 1660 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1661 } else { 1662 nfsrv_postopattr(nd, getret, &at); 1663 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1664 txdr_hyper(at.na_filerev, tl); 1665 tl += 2; 1666 } 1667 *tl++ = newnfs_false; 1668 *tl = newnfs_true; 1669 FREE((caddr_t)rbuf, M_TEMP); 1670 FREE((caddr_t)cookies, M_TEMP); 1671 goto out; 1672 } 1673 1674 /* 1675 * Check for degenerate cases of nothing useful read. 1676 * If so go try again 1677 */ 1678 cpos = rbuf; 1679 cend = rbuf + siz; 1680 dp = (struct dirent *)cpos; 1681 cookiep = cookies; 1682 1683 /* 1684 * For some reason FreeBSD's ufs_readdir() chooses to back the 1685 * directory offset up to a block boundary, so it is necessary to 1686 * skip over the records that precede the requested offset. This 1687 * requires the assumption that file offset cookies monotonically 1688 * increase. 1689 * Since the offset cookies don't monotonically increase for ZFS, 1690 * this is not done when ZFS is the file system. 1691 */ 1692 while (cpos < cend && ncookies > 0 && 1693 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1694 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) { 1695 cpos += dp->d_reclen; 1696 dp = (struct dirent *)cpos; 1697 cookiep++; 1698 ncookies--; 1699 } 1700 if (cpos >= cend || ncookies == 0) { 1701 siz = fullsiz; 1702 toff = off; 1703 goto again; 1704 } 1705 vput(vp); 1706 1707 /* 1708 * dirlen is the size of the reply, including all XDR and must 1709 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1710 * if the XDR should be included in "count", but to be safe, we do. 1711 * (Include the two booleans at the end of the reply in dirlen now.) 1712 */ 1713 if (nd->nd_flag & ND_NFSV3) { 1714 nfsrv_postopattr(nd, getret, &at); 1715 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1716 txdr_hyper(at.na_filerev, tl); 1717 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1718 } else { 1719 dirlen = 2 * NFSX_UNSIGNED; 1720 } 1721 1722 /* Loop through the records and build reply */ 1723 while (cpos < cend && ncookies > 0) { 1724 nlen = dp->d_namlen; 1725 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1726 nlen <= NFS_MAXNAMLEN) { 1727 if (nd->nd_flag & ND_NFSV3) 1728 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1729 else 1730 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1731 if (dirlen > cnt) { 1732 eofflag = 0; 1733 break; 1734 } 1735 1736 /* 1737 * Build the directory record xdr from 1738 * the dirent entry. 1739 */ 1740 if (nd->nd_flag & ND_NFSV3) { 1741 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1742 *tl++ = newnfs_true; 1743 *tl++ = 0; 1744 } else { 1745 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1746 *tl++ = newnfs_true; 1747 } 1748 *tl = txdr_unsigned(dp->d_fileno); 1749 (void) nfsm_strtom(nd, dp->d_name, nlen); 1750 if (nd->nd_flag & ND_NFSV3) { 1751 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1752 *tl++ = 0; 1753 } else 1754 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1755 *tl = txdr_unsigned(*cookiep); 1756 } 1757 cpos += dp->d_reclen; 1758 dp = (struct dirent *)cpos; 1759 cookiep++; 1760 ncookies--; 1761 } 1762 if (cpos < cend) 1763 eofflag = 0; 1764 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1765 *tl++ = newnfs_false; 1766 if (eofflag) 1767 *tl = newnfs_true; 1768 else 1769 *tl = newnfs_false; 1770 FREE((caddr_t)rbuf, M_TEMP); 1771 FREE((caddr_t)cookies, M_TEMP); 1772 1773 out: 1774 NFSEXITCODE2(0, nd); 1775 return (0); 1776 nfsmout: 1777 vput(vp); 1778 NFSEXITCODE2(error, nd); 1779 return (error); 1780 } 1781 1782 /* 1783 * Readdirplus for V3 and Readdir for V4. 1784 */ 1785 int 1786 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1787 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1788 { 1789 struct dirent *dp; 1790 u_int32_t *tl; 1791 int dirlen; 1792 char *cpos, *cend, *rbuf; 1793 struct vnode *nvp; 1794 fhandle_t nfh; 1795 struct nfsvattr nva, at, *nvap = &nva; 1796 struct mbuf *mb0, *mb1; 1797 struct nfsreferral *refp; 1798 int nlen, r, error = 0, getret = 1, usevget = 1; 1799 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1800 caddr_t bpos0, bpos1; 1801 u_int64_t off, toff, verf; 1802 u_long *cookies = NULL, *cookiep; 1803 nfsattrbit_t attrbits, rderrbits, savbits; 1804 struct uio io; 1805 struct iovec iv; 1806 struct componentname cn; 1807 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls; 1808 struct mount *mp, *new_mp; 1809 uint64_t mounted_on_fileno; 1810 1811 if (nd->nd_repstat) { 1812 nfsrv_postopattr(nd, getret, &at); 1813 goto out; 1814 } 1815 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1816 off = fxdr_hyper(tl); 1817 toff = off; 1818 tl += 2; 1819 verf = fxdr_hyper(tl); 1820 tl += 2; 1821 siz = fxdr_unsigned(int, *tl++); 1822 cnt = fxdr_unsigned(int, *tl); 1823 1824 /* 1825 * Use the server's maximum data transfer size as the upper bound 1826 * on reply datalen. 1827 */ 1828 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1829 cnt = NFS_SRVMAXDATA(nd); 1830 1831 /* 1832 * siz is a "hint" of how much directory information (name, fileid, 1833 * cookie) should be in the reply. At least one client "hints" 0, 1834 * so I set it to cnt for that case. I also round it up to the 1835 * next multiple of DIRBLKSIZ. 1836 */ 1837 if (siz <= 0) 1838 siz = cnt; 1839 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1840 1841 if (nd->nd_flag & ND_NFSV4) { 1842 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1843 if (error) 1844 goto nfsmout; 1845 NFSSET_ATTRBIT(&savbits, &attrbits); 1846 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1847 NFSZERO_ATTRBIT(&rderrbits); 1848 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1849 } else { 1850 NFSZERO_ATTRBIT(&attrbits); 1851 } 1852 fullsiz = siz; 1853 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1854 if (!nd->nd_repstat) { 1855 if (off && verf != at.na_filerev) { 1856 /* 1857 * va_filerev is not sufficient as a cookie verifier, 1858 * since it is not supposed to change when entries are 1859 * removed/added unless that offset cookies returned to 1860 * the client are no longer valid. 1861 */ 1862 #if 0 1863 if (nd->nd_flag & ND_NFSV4) { 1864 nd->nd_repstat = NFSERR_NOTSAME; 1865 } else { 1866 nd->nd_repstat = NFSERR_BAD_COOKIE; 1867 } 1868 #endif 1869 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1870 nd->nd_repstat = NFSERR_BAD_COOKIE; 1871 } 1872 } 1873 if (!nd->nd_repstat && vp->v_type != VDIR) 1874 nd->nd_repstat = NFSERR_NOTDIR; 1875 if (!nd->nd_repstat && cnt == 0) 1876 nd->nd_repstat = NFSERR_TOOSMALL; 1877 if (!nd->nd_repstat) 1878 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1879 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1880 NFSACCCHK_VPISLOCKED, NULL); 1881 if (nd->nd_repstat) { 1882 vput(vp); 1883 if (nd->nd_flag & ND_NFSV3) 1884 nfsrv_postopattr(nd, getret, &at); 1885 goto out; 1886 } 1887 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1888 1889 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1890 again: 1891 eofflag = 0; 1892 if (cookies) { 1893 free((caddr_t)cookies, M_TEMP); 1894 cookies = NULL; 1895 } 1896 1897 iv.iov_base = rbuf; 1898 iv.iov_len = siz; 1899 io.uio_iov = &iv; 1900 io.uio_iovcnt = 1; 1901 io.uio_offset = (off_t)off; 1902 io.uio_resid = siz; 1903 io.uio_segflg = UIO_SYSSPACE; 1904 io.uio_rw = UIO_READ; 1905 io.uio_td = NULL; 1906 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1907 &cookies); 1908 off = (u_int64_t)io.uio_offset; 1909 if (io.uio_resid) 1910 siz -= io.uio_resid; 1911 1912 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1913 1914 if (!cookies && !nd->nd_repstat) 1915 nd->nd_repstat = NFSERR_PERM; 1916 if (!nd->nd_repstat) 1917 nd->nd_repstat = getret; 1918 if (nd->nd_repstat) { 1919 vput(vp); 1920 if (cookies) 1921 free((caddr_t)cookies, M_TEMP); 1922 free((caddr_t)rbuf, M_TEMP); 1923 if (nd->nd_flag & ND_NFSV3) 1924 nfsrv_postopattr(nd, getret, &at); 1925 goto out; 1926 } 1927 /* 1928 * If nothing read, return eof 1929 * rpc reply 1930 */ 1931 if (siz == 0) { 1932 vput(vp); 1933 if (nd->nd_flag & ND_NFSV3) 1934 nfsrv_postopattr(nd, getret, &at); 1935 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1936 txdr_hyper(at.na_filerev, tl); 1937 tl += 2; 1938 *tl++ = newnfs_false; 1939 *tl = newnfs_true; 1940 free((caddr_t)cookies, M_TEMP); 1941 free((caddr_t)rbuf, M_TEMP); 1942 goto out; 1943 } 1944 1945 /* 1946 * Check for degenerate cases of nothing useful read. 1947 * If so go try again 1948 */ 1949 cpos = rbuf; 1950 cend = rbuf + siz; 1951 dp = (struct dirent *)cpos; 1952 cookiep = cookies; 1953 1954 /* 1955 * For some reason FreeBSD's ufs_readdir() chooses to back the 1956 * directory offset up to a block boundary, so it is necessary to 1957 * skip over the records that precede the requested offset. This 1958 * requires the assumption that file offset cookies monotonically 1959 * increase. 1960 * Since the offset cookies don't monotonically increase for ZFS, 1961 * this is not done when ZFS is the file system. 1962 */ 1963 while (cpos < cend && ncookies > 0 && 1964 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1965 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) || 1966 ((nd->nd_flag & ND_NFSV4) && 1967 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1968 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1969 cpos += dp->d_reclen; 1970 dp = (struct dirent *)cpos; 1971 cookiep++; 1972 ncookies--; 1973 } 1974 if (cpos >= cend || ncookies == 0) { 1975 siz = fullsiz; 1976 toff = off; 1977 goto again; 1978 } 1979 1980 /* 1981 * Busy the file system so that the mount point won't go away 1982 * and, as such, VFS_VGET() can be used safely. 1983 */ 1984 mp = vp->v_mount; 1985 vfs_ref(mp); 1986 NFSVOPUNLOCK(vp, 0); 1987 nd->nd_repstat = vfs_busy(mp, 0); 1988 vfs_rel(mp); 1989 if (nd->nd_repstat != 0) { 1990 vrele(vp); 1991 free(cookies, M_TEMP); 1992 free(rbuf, M_TEMP); 1993 if (nd->nd_flag & ND_NFSV3) 1994 nfsrv_postopattr(nd, getret, &at); 1995 goto out; 1996 } 1997 1998 /* 1999 * Check to see if entries in this directory can be safely acquired 2000 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2001 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2002 * automount of the snapshot directory that is required will 2003 * be done. 2004 * This needs to be done here for NFSv4, since NFSv4 never does 2005 * a VFS_VGET() for "." or "..". 2006 */ 2007 if (not_zfs == 0) { 2008 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2009 if (r == EOPNOTSUPP) { 2010 usevget = 0; 2011 cn.cn_nameiop = LOOKUP; 2012 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2013 cn.cn_cred = nd->nd_cred; 2014 cn.cn_thread = p; 2015 } else if (r == 0) 2016 vput(nvp); 2017 } 2018 2019 /* 2020 * Save this position, in case there is an error before one entry 2021 * is created. 2022 */ 2023 mb0 = nd->nd_mb; 2024 bpos0 = nd->nd_bpos; 2025 2026 /* 2027 * Fill in the first part of the reply. 2028 * dirlen is the reply length in bytes and cannot exceed cnt. 2029 * (Include the two booleans at the end of the reply in dirlen now, 2030 * so we recognize when we have exceeded cnt.) 2031 */ 2032 if (nd->nd_flag & ND_NFSV3) { 2033 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2034 nfsrv_postopattr(nd, getret, &at); 2035 } else { 2036 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2037 } 2038 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2039 txdr_hyper(at.na_filerev, tl); 2040 2041 /* 2042 * Save this position, in case there is an empty reply needed. 2043 */ 2044 mb1 = nd->nd_mb; 2045 bpos1 = nd->nd_bpos; 2046 2047 /* Loop through the records and build reply */ 2048 entrycnt = 0; 2049 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2050 nlen = dp->d_namlen; 2051 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2052 nlen <= NFS_MAXNAMLEN && 2053 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2054 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2055 || (nlen == 1 && dp->d_name[0] != '.'))) { 2056 /* 2057 * Save the current position in the reply, in case 2058 * this entry exceeds cnt. 2059 */ 2060 mb1 = nd->nd_mb; 2061 bpos1 = nd->nd_bpos; 2062 2063 /* 2064 * For readdir_and_lookup get the vnode using 2065 * the file number. 2066 */ 2067 nvp = NULL; 2068 refp = NULL; 2069 r = 0; 2070 at_root = 0; 2071 needs_unbusy = 0; 2072 new_mp = mp; 2073 mounted_on_fileno = (uint64_t)dp->d_fileno; 2074 if ((nd->nd_flag & ND_NFSV3) || 2075 NFSNONZERO_ATTRBIT(&savbits)) { 2076 if (nd->nd_flag & ND_NFSV4) 2077 refp = nfsv4root_getreferral(NULL, 2078 vp, dp->d_fileno); 2079 if (refp == NULL) { 2080 if (usevget) 2081 r = VFS_VGET(mp, dp->d_fileno, 2082 LK_SHARED, &nvp); 2083 else 2084 r = EOPNOTSUPP; 2085 if (r == EOPNOTSUPP) { 2086 if (usevget) { 2087 usevget = 0; 2088 cn.cn_nameiop = LOOKUP; 2089 cn.cn_lkflags = 2090 LK_SHARED | 2091 LK_RETRY; 2092 cn.cn_cred = 2093 nd->nd_cred; 2094 cn.cn_thread = p; 2095 } 2096 cn.cn_nameptr = dp->d_name; 2097 cn.cn_namelen = nlen; 2098 cn.cn_flags = ISLASTCN | 2099 NOFOLLOW | LOCKLEAF; 2100 if (nlen == 2 && 2101 dp->d_name[0] == '.' && 2102 dp->d_name[1] == '.') 2103 cn.cn_flags |= 2104 ISDOTDOT; 2105 if (NFSVOPLOCK(vp, LK_SHARED) 2106 != 0) { 2107 nd->nd_repstat = EPERM; 2108 break; 2109 } 2110 if ((vp->v_vflag & VV_ROOT) != 0 2111 && (cn.cn_flags & ISDOTDOT) 2112 != 0) { 2113 vref(vp); 2114 nvp = vp; 2115 r = 0; 2116 } else { 2117 r = VOP_LOOKUP(vp, &nvp, 2118 &cn); 2119 if (vp != nvp) 2120 NFSVOPUNLOCK(vp, 2121 0); 2122 } 2123 } 2124 2125 /* 2126 * For NFSv4, check to see if nvp is 2127 * a mount point and get the mount 2128 * point vnode, as required. 2129 */ 2130 if (r == 0 && 2131 nfsrv_enable_crossmntpt != 0 && 2132 (nd->nd_flag & ND_NFSV4) != 0 && 2133 nvp->v_type == VDIR && 2134 nvp->v_mountedhere != NULL) { 2135 new_mp = nvp->v_mountedhere; 2136 r = vfs_busy(new_mp, 0); 2137 vput(nvp); 2138 nvp = NULL; 2139 if (r == 0) { 2140 r = VFS_ROOT(new_mp, 2141 LK_SHARED, &nvp); 2142 needs_unbusy = 1; 2143 if (r == 0) 2144 at_root = 1; 2145 } 2146 } 2147 } 2148 if (!r) { 2149 if (refp == NULL && 2150 ((nd->nd_flag & ND_NFSV3) || 2151 NFSNONZERO_ATTRBIT(&attrbits))) { 2152 r = nfsvno_getfh(nvp, &nfh, p); 2153 if (!r) 2154 r = nfsvno_getattr(nvp, nvap, 2155 nd->nd_cred, p, 1); 2156 if (r == 0 && not_zfs == 0 && 2157 nfsrv_enable_crossmntpt != 0 && 2158 (nd->nd_flag & ND_NFSV4) != 0 && 2159 nvp->v_type == VDIR && 2160 vp->v_mount != nvp->v_mount) { 2161 /* 2162 * For a ZFS snapshot, there is a 2163 * pseudo mount that does not set 2164 * v_mountedhere, so it needs to 2165 * be detected via a different 2166 * mount structure. 2167 */ 2168 at_root = 1; 2169 if (new_mp == mp) 2170 new_mp = nvp->v_mount; 2171 } 2172 } 2173 } else { 2174 nvp = NULL; 2175 } 2176 if (r) { 2177 if (!NFSISSET_ATTRBIT(&attrbits, 2178 NFSATTRBIT_RDATTRERROR)) { 2179 if (nvp != NULL) 2180 vput(nvp); 2181 if (needs_unbusy != 0) 2182 vfs_unbusy(new_mp); 2183 nd->nd_repstat = r; 2184 break; 2185 } 2186 } 2187 } 2188 2189 /* 2190 * Build the directory record xdr 2191 */ 2192 if (nd->nd_flag & ND_NFSV3) { 2193 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2194 *tl++ = newnfs_true; 2195 *tl++ = 0; 2196 *tl = txdr_unsigned(dp->d_fileno); 2197 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2198 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2199 *tl++ = 0; 2200 *tl = txdr_unsigned(*cookiep); 2201 nfsrv_postopattr(nd, 0, nvap); 2202 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2203 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2204 if (nvp != NULL) 2205 vput(nvp); 2206 } else { 2207 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2208 *tl++ = newnfs_true; 2209 *tl++ = 0; 2210 *tl = txdr_unsigned(*cookiep); 2211 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2212 if (nvp != NULL) { 2213 supports_nfsv4acls = 2214 nfs_supportsnfsv4acls(nvp); 2215 NFSVOPUNLOCK(nvp, 0); 2216 } else 2217 supports_nfsv4acls = 0; 2218 if (refp != NULL) { 2219 dirlen += nfsrv_putreferralattr(nd, 2220 &savbits, refp, 0, 2221 &nd->nd_repstat); 2222 if (nd->nd_repstat) { 2223 if (nvp != NULL) 2224 vrele(nvp); 2225 if (needs_unbusy != 0) 2226 vfs_unbusy(new_mp); 2227 break; 2228 } 2229 } else if (r) { 2230 dirlen += nfsvno_fillattr(nd, new_mp, 2231 nvp, nvap, &nfh, r, &rderrbits, 2232 nd->nd_cred, p, isdgram, 0, 2233 supports_nfsv4acls, at_root, 2234 mounted_on_fileno); 2235 } else { 2236 dirlen += nfsvno_fillattr(nd, new_mp, 2237 nvp, nvap, &nfh, r, &attrbits, 2238 nd->nd_cred, p, isdgram, 0, 2239 supports_nfsv4acls, at_root, 2240 mounted_on_fileno); 2241 } 2242 if (nvp != NULL) 2243 vrele(nvp); 2244 dirlen += (3 * NFSX_UNSIGNED); 2245 } 2246 if (needs_unbusy != 0) 2247 vfs_unbusy(new_mp); 2248 if (dirlen <= cnt) 2249 entrycnt++; 2250 } 2251 cpos += dp->d_reclen; 2252 dp = (struct dirent *)cpos; 2253 cookiep++; 2254 ncookies--; 2255 } 2256 vrele(vp); 2257 vfs_unbusy(mp); 2258 2259 /* 2260 * If dirlen > cnt, we must strip off the last entry. If that 2261 * results in an empty reply, report NFSERR_TOOSMALL. 2262 */ 2263 if (dirlen > cnt || nd->nd_repstat) { 2264 if (!nd->nd_repstat && entrycnt == 0) 2265 nd->nd_repstat = NFSERR_TOOSMALL; 2266 if (nd->nd_repstat) 2267 newnfs_trimtrailing(nd, mb0, bpos0); 2268 else 2269 newnfs_trimtrailing(nd, mb1, bpos1); 2270 eofflag = 0; 2271 } else if (cpos < cend) 2272 eofflag = 0; 2273 if (!nd->nd_repstat) { 2274 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2275 *tl++ = newnfs_false; 2276 if (eofflag) 2277 *tl = newnfs_true; 2278 else 2279 *tl = newnfs_false; 2280 } 2281 FREE((caddr_t)cookies, M_TEMP); 2282 FREE((caddr_t)rbuf, M_TEMP); 2283 2284 out: 2285 NFSEXITCODE2(0, nd); 2286 return (0); 2287 nfsmout: 2288 vput(vp); 2289 NFSEXITCODE2(error, nd); 2290 return (error); 2291 } 2292 2293 /* 2294 * Get the settable attributes out of the mbuf list. 2295 * (Return 0 or EBADRPC) 2296 */ 2297 int 2298 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2299 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2300 { 2301 u_int32_t *tl; 2302 struct nfsv2_sattr *sp; 2303 int error = 0, toclient = 0; 2304 2305 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2306 case ND_NFSV2: 2307 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2308 /* 2309 * Some old clients didn't fill in the high order 16bits. 2310 * --> check the low order 2 bytes for 0xffff 2311 */ 2312 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2313 nvap->na_mode = nfstov_mode(sp->sa_mode); 2314 if (sp->sa_uid != newnfs_xdrneg1) 2315 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2316 if (sp->sa_gid != newnfs_xdrneg1) 2317 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2318 if (sp->sa_size != newnfs_xdrneg1) 2319 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2320 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2321 #ifdef notyet 2322 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2323 #else 2324 nvap->na_atime.tv_sec = 2325 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2326 nvap->na_atime.tv_nsec = 0; 2327 #endif 2328 } 2329 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2330 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2331 break; 2332 case ND_NFSV3: 2333 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2334 if (*tl == newnfs_true) { 2335 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2336 nvap->na_mode = nfstov_mode(*tl); 2337 } 2338 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2339 if (*tl == newnfs_true) { 2340 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2341 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2342 } 2343 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2344 if (*tl == newnfs_true) { 2345 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2346 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2347 } 2348 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2349 if (*tl == newnfs_true) { 2350 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2351 nvap->na_size = fxdr_hyper(tl); 2352 } 2353 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2354 switch (fxdr_unsigned(int, *tl)) { 2355 case NFSV3SATTRTIME_TOCLIENT: 2356 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2357 fxdr_nfsv3time(tl, &nvap->na_atime); 2358 toclient = 1; 2359 break; 2360 case NFSV3SATTRTIME_TOSERVER: 2361 vfs_timestamp(&nvap->na_atime); 2362 nvap->na_vaflags |= VA_UTIMES_NULL; 2363 break; 2364 }; 2365 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2366 switch (fxdr_unsigned(int, *tl)) { 2367 case NFSV3SATTRTIME_TOCLIENT: 2368 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2369 fxdr_nfsv3time(tl, &nvap->na_mtime); 2370 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2371 break; 2372 case NFSV3SATTRTIME_TOSERVER: 2373 vfs_timestamp(&nvap->na_mtime); 2374 if (!toclient) 2375 nvap->na_vaflags |= VA_UTIMES_NULL; 2376 break; 2377 }; 2378 break; 2379 case ND_NFSV4: 2380 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2381 }; 2382 nfsmout: 2383 NFSEXITCODE2(error, nd); 2384 return (error); 2385 } 2386 2387 /* 2388 * Handle the setable attributes for V4. 2389 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2390 */ 2391 int 2392 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2393 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2394 { 2395 u_int32_t *tl; 2396 int attrsum = 0; 2397 int i, j; 2398 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2399 int toclient = 0; 2400 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2401 uid_t uid; 2402 gid_t gid; 2403 2404 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2405 if (error) 2406 goto nfsmout; 2407 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2408 attrsize = fxdr_unsigned(int, *tl); 2409 2410 /* 2411 * Loop around getting the setable attributes. If an unsupported 2412 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2413 */ 2414 if (retnotsup) { 2415 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2416 bitpos = NFSATTRBIT_MAX; 2417 } else { 2418 bitpos = 0; 2419 } 2420 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2421 if (attrsum > attrsize) { 2422 error = NFSERR_BADXDR; 2423 goto nfsmout; 2424 } 2425 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2426 switch (bitpos) { 2427 case NFSATTRBIT_SIZE: 2428 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2429 nvap->na_size = fxdr_hyper(tl); 2430 attrsum += NFSX_HYPER; 2431 break; 2432 case NFSATTRBIT_ACL: 2433 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2434 p); 2435 if (error) 2436 goto nfsmout; 2437 if (aceerr && !nd->nd_repstat) 2438 nd->nd_repstat = aceerr; 2439 attrsum += aclsize; 2440 break; 2441 case NFSATTRBIT_ARCHIVE: 2442 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2443 if (!nd->nd_repstat) 2444 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2445 attrsum += NFSX_UNSIGNED; 2446 break; 2447 case NFSATTRBIT_HIDDEN: 2448 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2449 if (!nd->nd_repstat) 2450 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2451 attrsum += NFSX_UNSIGNED; 2452 break; 2453 case NFSATTRBIT_MIMETYPE: 2454 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2455 i = fxdr_unsigned(int, *tl); 2456 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2457 if (error) 2458 goto nfsmout; 2459 if (!nd->nd_repstat) 2460 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2461 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2462 break; 2463 case NFSATTRBIT_MODE: 2464 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2465 nvap->na_mode = nfstov_mode(*tl); 2466 attrsum += NFSX_UNSIGNED; 2467 break; 2468 case NFSATTRBIT_OWNER: 2469 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2470 j = fxdr_unsigned(int, *tl); 2471 if (j < 0) { 2472 error = NFSERR_BADXDR; 2473 goto nfsmout; 2474 } 2475 if (j > NFSV4_SMALLSTR) 2476 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2477 else 2478 cp = namestr; 2479 error = nfsrv_mtostr(nd, cp, j); 2480 if (error) { 2481 if (j > NFSV4_SMALLSTR) 2482 free(cp, M_NFSSTRING); 2483 goto nfsmout; 2484 } 2485 if (!nd->nd_repstat) { 2486 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2487 p); 2488 if (!nd->nd_repstat) 2489 nvap->na_uid = uid; 2490 } 2491 if (j > NFSV4_SMALLSTR) 2492 free(cp, M_NFSSTRING); 2493 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2494 break; 2495 case NFSATTRBIT_OWNERGROUP: 2496 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2497 j = fxdr_unsigned(int, *tl); 2498 if (j < 0) { 2499 error = NFSERR_BADXDR; 2500 goto nfsmout; 2501 } 2502 if (j > NFSV4_SMALLSTR) 2503 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2504 else 2505 cp = namestr; 2506 error = nfsrv_mtostr(nd, cp, j); 2507 if (error) { 2508 if (j > NFSV4_SMALLSTR) 2509 free(cp, M_NFSSTRING); 2510 goto nfsmout; 2511 } 2512 if (!nd->nd_repstat) { 2513 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2514 p); 2515 if (!nd->nd_repstat) 2516 nvap->na_gid = gid; 2517 } 2518 if (j > NFSV4_SMALLSTR) 2519 free(cp, M_NFSSTRING); 2520 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2521 break; 2522 case NFSATTRBIT_SYSTEM: 2523 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2524 if (!nd->nd_repstat) 2525 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2526 attrsum += NFSX_UNSIGNED; 2527 break; 2528 case NFSATTRBIT_TIMEACCESSSET: 2529 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2530 attrsum += NFSX_UNSIGNED; 2531 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2532 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2533 fxdr_nfsv4time(tl, &nvap->na_atime); 2534 toclient = 1; 2535 attrsum += NFSX_V4TIME; 2536 } else { 2537 vfs_timestamp(&nvap->na_atime); 2538 nvap->na_vaflags |= VA_UTIMES_NULL; 2539 } 2540 break; 2541 case NFSATTRBIT_TIMEBACKUP: 2542 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2543 if (!nd->nd_repstat) 2544 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2545 attrsum += NFSX_V4TIME; 2546 break; 2547 case NFSATTRBIT_TIMECREATE: 2548 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2549 if (!nd->nd_repstat) 2550 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2551 attrsum += NFSX_V4TIME; 2552 break; 2553 case NFSATTRBIT_TIMEMODIFYSET: 2554 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2555 attrsum += NFSX_UNSIGNED; 2556 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2557 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2558 fxdr_nfsv4time(tl, &nvap->na_mtime); 2559 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2560 attrsum += NFSX_V4TIME; 2561 } else { 2562 vfs_timestamp(&nvap->na_mtime); 2563 if (!toclient) 2564 nvap->na_vaflags |= VA_UTIMES_NULL; 2565 } 2566 break; 2567 default: 2568 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2569 /* 2570 * set bitpos so we drop out of the loop. 2571 */ 2572 bitpos = NFSATTRBIT_MAX; 2573 break; 2574 }; 2575 } 2576 2577 /* 2578 * some clients pad the attrlist, so we need to skip over the 2579 * padding. 2580 */ 2581 if (attrsum > attrsize) { 2582 error = NFSERR_BADXDR; 2583 } else { 2584 attrsize = NFSM_RNDUP(attrsize); 2585 if (attrsum < attrsize) 2586 error = nfsm_advance(nd, attrsize - attrsum, -1); 2587 } 2588 nfsmout: 2589 NFSEXITCODE2(error, nd); 2590 return (error); 2591 } 2592 2593 /* 2594 * Check/setup export credentials. 2595 */ 2596 int 2597 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2598 struct ucred *credanon) 2599 { 2600 int error = 0; 2601 2602 /* 2603 * Check/setup credentials. 2604 */ 2605 if (nd->nd_flag & ND_GSS) 2606 exp->nes_exflag &= ~MNT_EXPORTANON; 2607 2608 /* 2609 * Check to see if the operation is allowed for this security flavor. 2610 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2611 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2612 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2613 */ 2614 if (nfsvno_testexp(nd, exp) && 2615 nd->nd_procnum != NFSV4OP_SECINFO && 2616 nd->nd_procnum != NFSPROC_FSINFO) { 2617 if (nd->nd_flag & ND_NFSV4) 2618 error = NFSERR_WRONGSEC; 2619 else 2620 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2621 goto out; 2622 } 2623 2624 /* 2625 * Check to see if the file system is exported V4 only. 2626 */ 2627 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2628 error = NFSERR_PROGNOTV4; 2629 goto out; 2630 } 2631 2632 /* 2633 * Now, map the user credentials. 2634 * (Note that ND_AUTHNONE will only be set for an NFSv3 2635 * Fsinfo RPC. If set for anything else, this code might need 2636 * to change.) 2637 */ 2638 if (NFSVNO_EXPORTED(exp) && 2639 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) || 2640 NFSVNO_EXPORTANON(exp) || 2641 (nd->nd_flag & ND_AUTHNONE))) { 2642 nd->nd_cred->cr_uid = credanon->cr_uid; 2643 nd->nd_cred->cr_gid = credanon->cr_gid; 2644 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2645 credanon->cr_groups); 2646 } 2647 2648 out: 2649 NFSEXITCODE2(error, nd); 2650 return (error); 2651 } 2652 2653 /* 2654 * Check exports. 2655 */ 2656 int 2657 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2658 struct ucred **credp) 2659 { 2660 int i, error, *secflavors; 2661 2662 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2663 &exp->nes_numsecflavor, &secflavors); 2664 if (error) { 2665 if (nfs_rootfhset) { 2666 exp->nes_exflag = 0; 2667 exp->nes_numsecflavor = 0; 2668 error = 0; 2669 } 2670 } else { 2671 /* Copy the security flavors. */ 2672 for (i = 0; i < exp->nes_numsecflavor; i++) 2673 exp->nes_secflavors[i] = secflavors[i]; 2674 } 2675 NFSEXITCODE(error); 2676 return (error); 2677 } 2678 2679 /* 2680 * Get a vnode for a file handle and export stuff. 2681 */ 2682 int 2683 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2684 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2685 struct ucred **credp) 2686 { 2687 int i, error, *secflavors; 2688 2689 *credp = NULL; 2690 exp->nes_numsecflavor = 0; 2691 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2692 if (error != 0) 2693 /* Make sure the server replies ESTALE to the client. */ 2694 error = ESTALE; 2695 if (nam && !error) { 2696 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2697 &exp->nes_numsecflavor, &secflavors); 2698 if (error) { 2699 if (nfs_rootfhset) { 2700 exp->nes_exflag = 0; 2701 exp->nes_numsecflavor = 0; 2702 error = 0; 2703 } else { 2704 vput(*vpp); 2705 } 2706 } else { 2707 /* Copy the security flavors. */ 2708 for (i = 0; i < exp->nes_numsecflavor; i++) 2709 exp->nes_secflavors[i] = secflavors[i]; 2710 } 2711 } 2712 NFSEXITCODE(error); 2713 return (error); 2714 } 2715 2716 /* 2717 * nfsd_fhtovp() - convert a fh to a vnode ptr 2718 * - look up fsid in mount list (if not found ret error) 2719 * - get vp and export rights by calling nfsvno_fhtovp() 2720 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2721 * for AUTH_SYS 2722 * - if mpp != NULL, return the mount point so that it can 2723 * be used for vn_finished_write() by the caller 2724 */ 2725 void 2726 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2727 struct vnode **vpp, struct nfsexstuff *exp, 2728 struct mount **mpp, int startwrite, struct thread *p) 2729 { 2730 struct mount *mp; 2731 struct ucred *credanon; 2732 fhandle_t *fhp; 2733 2734 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2735 /* 2736 * Check for the special case of the nfsv4root_fh. 2737 */ 2738 mp = vfs_busyfs(&fhp->fh_fsid); 2739 if (mpp != NULL) 2740 *mpp = mp; 2741 if (mp == NULL) { 2742 *vpp = NULL; 2743 nd->nd_repstat = ESTALE; 2744 goto out; 2745 } 2746 2747 if (startwrite) { 2748 vn_start_write(NULL, mpp, V_WAIT); 2749 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2750 lktype = LK_EXCLUSIVE; 2751 } 2752 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2753 &credanon); 2754 vfs_unbusy(mp); 2755 2756 /* 2757 * For NFSv4 without a pseudo root fs, unexported file handles 2758 * can be returned, so that Lookup works everywhere. 2759 */ 2760 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2761 !(nd->nd_flag & ND_NFSV4)) { 2762 vput(*vpp); 2763 nd->nd_repstat = EACCES; 2764 } 2765 2766 /* 2767 * Personally, I've never seen any point in requiring a 2768 * reserved port#, since only in the rare case where the 2769 * clients are all boxes with secure system priviledges, 2770 * does it provide any enhanced security, but... some people 2771 * believe it to be useful and keep putting this code back in. 2772 * (There is also some "security checker" out there that 2773 * complains if the nfs server doesn't enforce this.) 2774 * However, note the following: 2775 * RFC3530 (NFSv4) specifies that a reserved port# not be 2776 * required. 2777 * RFC2623 recommends that, if a reserved port# is checked for, 2778 * that there be a way to turn that off--> ifdef'd. 2779 */ 2780 #ifdef NFS_REQRSVPORT 2781 if (!nd->nd_repstat) { 2782 struct sockaddr_in *saddr; 2783 struct sockaddr_in6 *saddr6; 2784 2785 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2786 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2787 if (!(nd->nd_flag & ND_NFSV4) && 2788 ((saddr->sin_family == AF_INET && 2789 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2790 (saddr6->sin6_family == AF_INET6 && 2791 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2792 vput(*vpp); 2793 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2794 } 2795 } 2796 #endif /* NFS_REQRSVPORT */ 2797 2798 /* 2799 * Check/setup credentials. 2800 */ 2801 if (!nd->nd_repstat) { 2802 nd->nd_saveduid = nd->nd_cred->cr_uid; 2803 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2804 if (nd->nd_repstat) 2805 vput(*vpp); 2806 } 2807 if (credanon != NULL) 2808 crfree(credanon); 2809 if (nd->nd_repstat) { 2810 if (startwrite) 2811 vn_finished_write(mp); 2812 *vpp = NULL; 2813 if (mpp != NULL) 2814 *mpp = NULL; 2815 } 2816 2817 out: 2818 NFSEXITCODE2(0, nd); 2819 } 2820 2821 /* 2822 * glue for fp. 2823 */ 2824 static int 2825 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2826 { 2827 struct filedesc *fdp; 2828 struct file *fp; 2829 int error = 0; 2830 2831 fdp = p->td_proc->p_fd; 2832 if (fd < 0 || fd >= fdp->fd_nfiles || 2833 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2834 error = EBADF; 2835 goto out; 2836 } 2837 *fpp = fp; 2838 2839 out: 2840 NFSEXITCODE(error); 2841 return (error); 2842 } 2843 2844 /* 2845 * Called from nfssvc() to update the exports list. Just call 2846 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2847 * in the mount list. 2848 */ 2849 int 2850 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2851 { 2852 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2853 int error = 0; 2854 struct nameidata nd; 2855 fhandle_t fh; 2856 2857 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2858 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2859 nfs_rootfhset = 0; 2860 else if (error == 0) { 2861 if (nfsexargp->fspec == NULL) { 2862 error = EPERM; 2863 goto out; 2864 } 2865 /* 2866 * If fspec != NULL, this is the v4root path. 2867 */ 2868 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2869 nfsexargp->fspec, p); 2870 if ((error = namei(&nd)) != 0) 2871 goto out; 2872 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2873 vrele(nd.ni_vp); 2874 if (!error) { 2875 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2876 NFSBCOPY((caddr_t)&fh, 2877 nfs_rootfh.nfsrvfh_data, 2878 sizeof (fhandle_t)); 2879 nfs_rootfhset = 1; 2880 } 2881 } 2882 2883 out: 2884 NFSEXITCODE(error); 2885 return (error); 2886 } 2887 2888 /* 2889 * This function needs to test to see if the system is near its limit 2890 * for memory allocation via malloc() or mget() and return True iff 2891 * either of these resources are near their limit. 2892 * XXX (For now, this is just a stub.) 2893 */ 2894 int nfsrv_testmalloclimit = 0; 2895 int 2896 nfsrv_mallocmget_limit(void) 2897 { 2898 static int printmesg = 0; 2899 static int testval = 1; 2900 2901 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2902 if ((printmesg++ % 100) == 0) 2903 printf("nfsd: malloc/mget near limit\n"); 2904 return (1); 2905 } 2906 return (0); 2907 } 2908 2909 /* 2910 * BSD specific initialization of a mount point. 2911 */ 2912 void 2913 nfsd_mntinit(void) 2914 { 2915 static int inited = 0; 2916 2917 if (inited) 2918 return; 2919 inited = 1; 2920 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2921 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2922 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2923 nfsv4root_mnt.mnt_export = NULL; 2924 TAILQ_INIT(&nfsv4root_opt); 2925 TAILQ_INIT(&nfsv4root_newopt); 2926 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2927 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2928 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2929 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2930 } 2931 2932 /* 2933 * Get a vnode for a file handle, without checking exports, etc. 2934 */ 2935 struct vnode * 2936 nfsvno_getvp(fhandle_t *fhp) 2937 { 2938 struct mount *mp; 2939 struct vnode *vp; 2940 int error; 2941 2942 mp = vfs_busyfs(&fhp->fh_fsid); 2943 if (mp == NULL) 2944 return (NULL); 2945 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2946 vfs_unbusy(mp); 2947 if (error) 2948 return (NULL); 2949 return (vp); 2950 } 2951 2952 /* 2953 * Do a local VOP_ADVLOCK(). 2954 */ 2955 int 2956 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2957 u_int64_t end, struct thread *td) 2958 { 2959 int error = 0; 2960 struct flock fl; 2961 u_int64_t tlen; 2962 2963 if (nfsrv_dolocallocks == 0) 2964 goto out; 2965 2966 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */ 2967 if ((vp->v_iflag & VI_DOOMED) != 0) { 2968 error = EPERM; 2969 goto out; 2970 } 2971 2972 fl.l_whence = SEEK_SET; 2973 fl.l_type = ftype; 2974 fl.l_start = (off_t)first; 2975 if (end == NFS64BITSSET) { 2976 fl.l_len = 0; 2977 } else { 2978 tlen = end - first; 2979 fl.l_len = (off_t)tlen; 2980 } 2981 /* 2982 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2983 * values for all calls, so that all locks will be held by the 2984 * nfsd server. (The nfsd server handles conflicts between the 2985 * various clients.) 2986 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2987 * bytes, so it can't be put in l_sysid. 2988 */ 2989 if (nfsv4_sysid == 0) 2990 nfsv4_sysid = nlm_acquire_next_sysid(); 2991 fl.l_pid = (pid_t)0; 2992 fl.l_sysid = (int)nfsv4_sysid; 2993 2994 NFSVOPUNLOCK(vp, 0); 2995 if (ftype == F_UNLCK) 2996 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 2997 (F_POSIX | F_REMOTE)); 2998 else 2999 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3000 (F_POSIX | F_REMOTE)); 3001 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3002 3003 out: 3004 NFSEXITCODE(error); 3005 return (error); 3006 } 3007 3008 /* 3009 * Check the nfsv4 root exports. 3010 */ 3011 int 3012 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3013 { 3014 struct ucred *credanon; 3015 int exflags, error = 0, numsecflavor, *secflavors, i; 3016 3017 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3018 &credanon, &numsecflavor, &secflavors); 3019 if (error) { 3020 error = NFSERR_PROGUNAVAIL; 3021 goto out; 3022 } 3023 if (credanon != NULL) 3024 crfree(credanon); 3025 for (i = 0; i < numsecflavor; i++) { 3026 if (secflavors[i] == AUTH_SYS) 3027 nd->nd_flag |= ND_EXAUTHSYS; 3028 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3029 nd->nd_flag |= ND_EXGSS; 3030 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3031 nd->nd_flag |= ND_EXGSSINTEGRITY; 3032 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3033 nd->nd_flag |= ND_EXGSSPRIVACY; 3034 } 3035 3036 out: 3037 NFSEXITCODE(error); 3038 return (error); 3039 } 3040 3041 /* 3042 * Nfs server psuedo system call for the nfsd's 3043 */ 3044 /* 3045 * MPSAFE 3046 */ 3047 static int 3048 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3049 { 3050 struct file *fp; 3051 struct nfsd_addsock_args sockarg; 3052 struct nfsd_nfsd_args nfsdarg; 3053 cap_rights_t rights; 3054 int error; 3055 3056 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3057 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3058 if (error) 3059 goto out; 3060 /* 3061 * Since we don't know what rights might be required, 3062 * pretend that we need them all. It is better to be too 3063 * careful than too reckless. 3064 */ 3065 error = fget(td, sockarg.sock, 3066 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3067 if (error != 0) 3068 goto out; 3069 if (fp->f_type != DTYPE_SOCKET) { 3070 fdrop(fp, td); 3071 error = EPERM; 3072 goto out; 3073 } 3074 error = nfsrvd_addsock(fp); 3075 fdrop(fp, td); 3076 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3077 if (uap->argp == NULL) { 3078 error = EINVAL; 3079 goto out; 3080 } 3081 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3082 sizeof (nfsdarg)); 3083 if (error) 3084 goto out; 3085 error = nfsrvd_nfsd(td, &nfsdarg); 3086 } else { 3087 error = nfssvc_srvcall(td, uap, td->td_ucred); 3088 } 3089 3090 out: 3091 NFSEXITCODE(error); 3092 return (error); 3093 } 3094 3095 static int 3096 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3097 { 3098 struct nfsex_args export; 3099 struct file *fp = NULL; 3100 int stablefd, len; 3101 struct nfsd_clid adminrevoke; 3102 struct nfsd_dumplist dumplist; 3103 struct nfsd_dumpclients *dumpclients; 3104 struct nfsd_dumplocklist dumplocklist; 3105 struct nfsd_dumplocks *dumplocks; 3106 struct nameidata nd; 3107 vnode_t vp; 3108 int error = EINVAL, igotlock; 3109 struct proc *procp; 3110 static int suspend_nfsd = 0; 3111 3112 if (uap->flag & NFSSVC_PUBLICFH) { 3113 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3114 sizeof (fhandle_t)); 3115 error = copyin(uap->argp, 3116 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3117 if (!error) 3118 nfs_pubfhset = 1; 3119 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3120 error = copyin(uap->argp,(caddr_t)&export, 3121 sizeof (struct nfsex_args)); 3122 if (!error) 3123 error = nfsrv_v4rootexport(&export, cred, p); 3124 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3125 nfs_pubfhset = 0; 3126 error = 0; 3127 } else if (uap->flag & NFSSVC_STABLERESTART) { 3128 error = copyin(uap->argp, (caddr_t)&stablefd, 3129 sizeof (int)); 3130 if (!error) 3131 error = fp_getfvp(p, stablefd, &fp, &vp); 3132 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3133 error = EBADF; 3134 if (!error && newnfs_numnfsd != 0) 3135 error = EPERM; 3136 if (!error) { 3137 nfsrv_stablefirst.nsf_fp = fp; 3138 nfsrv_setupstable(p); 3139 } 3140 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3141 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3142 sizeof (struct nfsd_clid)); 3143 if (!error) 3144 error = nfsrv_adminrevoke(&adminrevoke, p); 3145 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3146 error = copyin(uap->argp, (caddr_t)&dumplist, 3147 sizeof (struct nfsd_dumplist)); 3148 if (!error && (dumplist.ndl_size < 1 || 3149 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3150 error = EPERM; 3151 if (!error) { 3152 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3153 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3154 M_TEMP, M_WAITOK); 3155 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3156 error = copyout(dumpclients, 3157 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3158 free((caddr_t)dumpclients, M_TEMP); 3159 } 3160 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3161 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3162 sizeof (struct nfsd_dumplocklist)); 3163 if (!error && (dumplocklist.ndllck_size < 1 || 3164 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3165 error = EPERM; 3166 if (!error) 3167 error = nfsrv_lookupfilename(&nd, 3168 dumplocklist.ndllck_fname, p); 3169 if (!error) { 3170 len = sizeof (struct nfsd_dumplocks) * 3171 dumplocklist.ndllck_size; 3172 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3173 M_TEMP, M_WAITOK); 3174 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3175 dumplocklist.ndllck_size, p); 3176 vput(nd.ni_vp); 3177 error = copyout(dumplocks, 3178 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3179 free((caddr_t)dumplocks, M_TEMP); 3180 } 3181 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3182 procp = p->td_proc; 3183 PROC_LOCK(procp); 3184 nfsd_master_pid = procp->p_pid; 3185 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3186 nfsd_master_start = procp->p_stats->p_start; 3187 nfsd_master_proc = procp; 3188 PROC_UNLOCK(procp); 3189 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3190 NFSLOCKV4ROOTMUTEX(); 3191 if (suspend_nfsd == 0) { 3192 /* Lock out all nfsd threads */ 3193 do { 3194 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3195 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3196 } while (igotlock == 0 && suspend_nfsd == 0); 3197 suspend_nfsd = 1; 3198 } 3199 NFSUNLOCKV4ROOTMUTEX(); 3200 error = 0; 3201 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3202 NFSLOCKV4ROOTMUTEX(); 3203 if (suspend_nfsd != 0) { 3204 nfsv4_unlock(&nfsd_suspend_lock, 0); 3205 suspend_nfsd = 0; 3206 } 3207 NFSUNLOCKV4ROOTMUTEX(); 3208 error = 0; 3209 } 3210 3211 NFSEXITCODE(error); 3212 return (error); 3213 } 3214 3215 /* 3216 * Check exports. 3217 * Returns 0 if ok, 1 otherwise. 3218 */ 3219 int 3220 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3221 { 3222 int i; 3223 3224 /* 3225 * This seems odd, but allow the case where the security flavor 3226 * list is empty. This happens when NFSv4 is traversing non-exported 3227 * file systems. Exported file systems should always have a non-empty 3228 * security flavor list. 3229 */ 3230 if (exp->nes_numsecflavor == 0) 3231 return (0); 3232 3233 for (i = 0; i < exp->nes_numsecflavor; i++) { 3234 /* 3235 * The tests for privacy and integrity must be first, 3236 * since ND_GSS is set for everything but AUTH_SYS. 3237 */ 3238 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3239 (nd->nd_flag & ND_GSSPRIVACY)) 3240 return (0); 3241 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3242 (nd->nd_flag & ND_GSSINTEGRITY)) 3243 return (0); 3244 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3245 (nd->nd_flag & ND_GSS)) 3246 return (0); 3247 if (exp->nes_secflavors[i] == AUTH_SYS && 3248 (nd->nd_flag & ND_GSS) == 0) 3249 return (0); 3250 } 3251 return (1); 3252 } 3253 3254 /* 3255 * Calculate a hash value for the fid in a file handle. 3256 */ 3257 uint32_t 3258 nfsrv_hashfh(fhandle_t *fhp) 3259 { 3260 uint32_t hashval; 3261 3262 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3263 return (hashval); 3264 } 3265 3266 /* 3267 * Signal the userland master nfsd to backup the stable restart file. 3268 */ 3269 void 3270 nfsrv_backupstable(void) 3271 { 3272 struct proc *procp; 3273 3274 if (nfsd_master_proc != NULL) { 3275 procp = pfind(nfsd_master_pid); 3276 /* Try to make sure it is the correct process. */ 3277 if (procp == nfsd_master_proc && 3278 procp->p_stats->p_start.tv_sec == 3279 nfsd_master_start.tv_sec && 3280 procp->p_stats->p_start.tv_usec == 3281 nfsd_master_start.tv_usec && 3282 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3283 kern_psignal(procp, SIGUSR2); 3284 else 3285 nfsd_master_proc = NULL; 3286 3287 if (procp != NULL) 3288 PROC_UNLOCK(procp); 3289 } 3290 } 3291 3292 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3293 3294 /* 3295 * Called once to initialize data structures... 3296 */ 3297 static int 3298 nfsd_modevent(module_t mod, int type, void *data) 3299 { 3300 int error = 0, i; 3301 static int loaded = 0; 3302 3303 switch (type) { 3304 case MOD_LOAD: 3305 if (loaded) 3306 goto out; 3307 newnfs_portinit(); 3308 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3309 snprintf(nfsrchash_table[i].lock_name, 3310 sizeof(nfsrchash_table[i].lock_name), "nfsrc_tcp%d", 3311 i); 3312 mtx_init(&nfsrchash_table[i].mtx, 3313 nfsrchash_table[i].lock_name, NULL, MTX_DEF); 3314 snprintf(nfsrcahash_table[i].lock_name, 3315 sizeof(nfsrcahash_table[i].lock_name), "nfsrc_tcpa%d", 3316 i); 3317 mtx_init(&nfsrcahash_table[i].mtx, 3318 nfsrcahash_table[i].lock_name, NULL, MTX_DEF); 3319 } 3320 mtx_init(&nfsrc_udpmtx, "nfs_udpcache_mutex", NULL, MTX_DEF); 3321 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF); 3322 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL, 3323 MTX_DEF); 3324 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3325 nfsrvd_initcache(); 3326 nfsd_init(); 3327 NFSD_LOCK(); 3328 nfsrvd_init(0); 3329 NFSD_UNLOCK(); 3330 nfsd_mntinit(); 3331 #ifdef VV_DISABLEDELEG 3332 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3333 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3334 #endif 3335 nfsd_call_servertimer = nfsrv_servertimer; 3336 nfsd_call_nfsd = nfssvc_nfsd; 3337 loaded = 1; 3338 break; 3339 3340 case MOD_UNLOAD: 3341 if (newnfs_numnfsd != 0) { 3342 error = EBUSY; 3343 break; 3344 } 3345 3346 #ifdef VV_DISABLEDELEG 3347 vn_deleg_ops.vndeleg_recall = NULL; 3348 vn_deleg_ops.vndeleg_disable = NULL; 3349 #endif 3350 nfsd_call_servertimer = NULL; 3351 nfsd_call_nfsd = NULL; 3352 3353 /* Clean out all NFSv4 state. */ 3354 nfsrv_throwawayallstate(curthread); 3355 3356 /* Clean the NFS server reply cache */ 3357 nfsrvd_cleancache(); 3358 3359 /* Free up the krpc server pool. */ 3360 if (nfsrvd_pool != NULL) 3361 svcpool_destroy(nfsrvd_pool); 3362 3363 /* and get rid of the locks */ 3364 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3365 mtx_destroy(&nfsrchash_table[i].mtx); 3366 mtx_destroy(&nfsrcahash_table[i].mtx); 3367 } 3368 mtx_destroy(&nfsrc_udpmtx); 3369 mtx_destroy(&nfs_v4root_mutex); 3370 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3371 lockdestroy(&nfsv4root_mnt.mnt_explock); 3372 loaded = 0; 3373 break; 3374 default: 3375 error = EOPNOTSUPP; 3376 break; 3377 } 3378 3379 out: 3380 NFSEXITCODE(error); 3381 return (error); 3382 } 3383 static moduledata_t nfsd_mod = { 3384 "nfsd", 3385 nfsd_modevent, 3386 NULL, 3387 }; 3388 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3389 3390 /* So that loader and kldload(2) can find us, wherever we are.. */ 3391 MODULE_VERSION(nfsd, 1); 3392 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3393 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3394 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3395 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3396 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3397 3398