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 * 3. 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 extern struct nfsclienthashhead *nfsclienthash; 62 extern struct nfslockhashhead *nfslockhash; 63 extern struct nfssessionhash *nfssessionhash; 64 extern int nfsrv_sessionhashsize; 65 extern struct nfsstatsv1 nfsstatsv1; 66 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 67 NFSDLOCKMUTEX; 68 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 69 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 70 struct mtx nfsrc_udpmtx; 71 struct mtx nfs_v4root_mutex; 72 struct nfsrvfh nfs_rootfh, nfs_pubfh; 73 int nfs_pubfhset = 0, nfs_rootfhset = 0; 74 struct proc *nfsd_master_proc = NULL; 75 int nfsd_debuglevel = 0; 76 static pid_t nfsd_master_pid = (pid_t)-1; 77 static char nfsd_master_comm[MAXCOMLEN + 1]; 78 static struct timeval nfsd_master_start; 79 static uint32_t nfsv4_sysid = 0; 80 81 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 82 struct ucred *); 83 84 int nfsrv_enable_crossmntpt = 1; 85 static int nfs_commit_blks; 86 static int nfs_commit_miss; 87 extern int nfsrv_issuedelegs; 88 extern int nfsrv_dolocallocks; 89 extern int nfsd_enable_stringtouid; 90 extern int nfsd_enable_uidtostring; 91 92 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "NFS server"); 93 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 94 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 95 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 96 0, ""); 97 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 98 0, ""); 99 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 100 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 101 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 102 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 103 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 104 0, "Debug level for NFS server"); 105 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 106 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 107 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_uidtostring, CTLFLAG_RW, 108 &nfsd_enable_uidtostring, 0, "Make nfsd always send numeric owner_names"); 109 110 #define MAX_REORDERED_RPC 16 111 #define NUM_HEURISTIC 1031 112 #define NHUSE_INIT 64 113 #define NHUSE_INC 16 114 #define NHUSE_MAX 2048 115 116 static struct nfsheur { 117 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 118 off_t nh_nextoff; /* next offset for sequential detection */ 119 int nh_use; /* use count for selection */ 120 int nh_seqcount; /* heuristic */ 121 } nfsheur[NUM_HEURISTIC]; 122 123 124 /* 125 * Heuristic to detect sequential operation. 126 */ 127 static struct nfsheur * 128 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 129 { 130 struct nfsheur *nh; 131 int hi, try; 132 133 /* Locate best candidate. */ 134 try = 32; 135 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 136 nh = &nfsheur[hi]; 137 while (try--) { 138 if (nfsheur[hi].nh_vp == vp) { 139 nh = &nfsheur[hi]; 140 break; 141 } 142 if (nfsheur[hi].nh_use > 0) 143 --nfsheur[hi].nh_use; 144 hi = (hi + 1) % NUM_HEURISTIC; 145 if (nfsheur[hi].nh_use < nh->nh_use) 146 nh = &nfsheur[hi]; 147 } 148 149 /* Initialize hint if this is a new file. */ 150 if (nh->nh_vp != vp) { 151 nh->nh_vp = vp; 152 nh->nh_nextoff = uio->uio_offset; 153 nh->nh_use = NHUSE_INIT; 154 if (uio->uio_offset == 0) 155 nh->nh_seqcount = 4; 156 else 157 nh->nh_seqcount = 1; 158 } 159 160 /* Calculate heuristic. */ 161 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 162 uio->uio_offset == nh->nh_nextoff) { 163 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 164 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 165 if (nh->nh_seqcount > IO_SEQMAX) 166 nh->nh_seqcount = IO_SEQMAX; 167 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 168 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 169 /* Probably a reordered RPC, leave seqcount alone. */ 170 } else if (nh->nh_seqcount > 1) { 171 nh->nh_seqcount /= 2; 172 } else { 173 nh->nh_seqcount = 0; 174 } 175 nh->nh_use += NHUSE_INC; 176 if (nh->nh_use > NHUSE_MAX) 177 nh->nh_use = NHUSE_MAX; 178 return (nh); 179 } 180 181 /* 182 * Get attributes into nfsvattr structure. 183 */ 184 int 185 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 186 struct thread *p, int vpislocked) 187 { 188 int error, lockedit = 0; 189 190 if (vpislocked == 0) { 191 /* 192 * When vpislocked == 0, the vnode is either exclusively 193 * locked by this thread or not locked by this thread. 194 * As such, shared lock it, if not exclusively locked. 195 */ 196 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 197 lockedit = 1; 198 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 199 } 200 } 201 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 202 if (lockedit != 0) 203 NFSVOPUNLOCK(vp, 0); 204 205 NFSEXITCODE(error); 206 return (error); 207 } 208 209 /* 210 * Get a file handle for a vnode. 211 */ 212 int 213 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 214 { 215 int error; 216 217 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 218 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 219 error = VOP_VPTOFH(vp, &fhp->fh_fid); 220 221 NFSEXITCODE(error); 222 return (error); 223 } 224 225 /* 226 * Perform access checking for vnodes obtained from file handles that would 227 * refer to files already opened by a Unix client. You cannot just use 228 * vn_writechk() and VOP_ACCESSX() for two reasons. 229 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 230 * case. 231 * 2 - The owner is to be given access irrespective of mode bits for some 232 * operations, so that processes that chmod after opening a file don't 233 * break. 234 */ 235 int 236 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 237 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 238 u_int32_t *supportedtypep) 239 { 240 struct vattr vattr; 241 int error = 0, getret = 0; 242 243 if (vpislocked == 0) { 244 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 245 error = EPERM; 246 goto out; 247 } 248 } 249 if (accmode & VWRITE) { 250 /* Just vn_writechk() changed to check rdonly */ 251 /* 252 * Disallow write attempts on read-only file systems; 253 * unless the file is a socket or a block or character 254 * device resident on the file system. 255 */ 256 if (NFSVNO_EXRDONLY(exp) || 257 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 258 switch (vp->v_type) { 259 case VREG: 260 case VDIR: 261 case VLNK: 262 error = EROFS; 263 default: 264 break; 265 } 266 } 267 /* 268 * If there's shared text associated with 269 * the inode, try to free it up once. If 270 * we fail, we can't allow writing. 271 */ 272 if (VOP_IS_TEXT(vp) && error == 0) 273 error = ETXTBSY; 274 } 275 if (error != 0) { 276 if (vpislocked == 0) 277 NFSVOPUNLOCK(vp, 0); 278 goto out; 279 } 280 281 /* 282 * Should the override still be applied when ACLs are enabled? 283 */ 284 error = VOP_ACCESSX(vp, accmode, cred, p); 285 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 286 /* 287 * Try again with VEXPLICIT_DENY, to see if the test for 288 * deletion is supported. 289 */ 290 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 291 if (error == 0) { 292 if (vp->v_type == VDIR) { 293 accmode &= ~(VDELETE | VDELETE_CHILD); 294 accmode |= VWRITE; 295 error = VOP_ACCESSX(vp, accmode, cred, p); 296 } else if (supportedtypep != NULL) { 297 *supportedtypep &= ~NFSACCESS_DELETE; 298 } 299 } 300 } 301 302 /* 303 * Allow certain operations for the owner (reads and writes 304 * on files that are already open). 305 */ 306 if (override != NFSACCCHK_NOOVERRIDE && 307 (error == EPERM || error == EACCES)) { 308 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 309 error = 0; 310 else if (override & NFSACCCHK_ALLOWOWNER) { 311 getret = VOP_GETATTR(vp, &vattr, cred); 312 if (getret == 0 && cred->cr_uid == vattr.va_uid) 313 error = 0; 314 } 315 } 316 if (vpislocked == 0) 317 NFSVOPUNLOCK(vp, 0); 318 319 out: 320 NFSEXITCODE(error); 321 return (error); 322 } 323 324 /* 325 * Set attribute(s) vnop. 326 */ 327 int 328 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 329 struct thread *p, struct nfsexstuff *exp) 330 { 331 int error; 332 333 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 334 NFSEXITCODE(error); 335 return (error); 336 } 337 338 /* 339 * Set up nameidata for a lookup() call and do it. 340 */ 341 int 342 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 343 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 344 struct vnode **retdirp) 345 { 346 struct componentname *cnp = &ndp->ni_cnd; 347 int i; 348 struct iovec aiov; 349 struct uio auio; 350 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 351 int error = 0, crossmnt; 352 char *cp; 353 354 *retdirp = NULL; 355 cnp->cn_nameptr = cnp->cn_pnbuf; 356 ndp->ni_lcf = 0; 357 /* 358 * Extract and set starting directory. 359 */ 360 if (dp->v_type != VDIR) { 361 if (islocked) 362 vput(dp); 363 else 364 vrele(dp); 365 nfsvno_relpathbuf(ndp); 366 error = ENOTDIR; 367 goto out1; 368 } 369 if (islocked) 370 NFSVOPUNLOCK(dp, 0); 371 VREF(dp); 372 *retdirp = dp; 373 if (NFSVNO_EXRDONLY(exp)) 374 cnp->cn_flags |= RDONLY; 375 ndp->ni_segflg = UIO_SYSSPACE; 376 crossmnt = 1; 377 378 if (nd->nd_flag & ND_PUBLOOKUP) { 379 ndp->ni_loopcnt = 0; 380 if (cnp->cn_pnbuf[0] == '/') { 381 vrele(dp); 382 /* 383 * Check for degenerate pathnames here, since lookup() 384 * panics on them. 385 */ 386 for (i = 1; i < ndp->ni_pathlen; i++) 387 if (cnp->cn_pnbuf[i] != '/') 388 break; 389 if (i == ndp->ni_pathlen) { 390 error = NFSERR_ACCES; 391 goto out; 392 } 393 dp = rootvnode; 394 VREF(dp); 395 } 396 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 397 (nd->nd_flag & ND_NFSV4) == 0) { 398 /* 399 * Only cross mount points for NFSv4 when doing a 400 * mount while traversing the file system above 401 * the mount point, unless nfsrv_enable_crossmntpt is set. 402 */ 403 cnp->cn_flags |= NOCROSSMOUNT; 404 crossmnt = 0; 405 } 406 407 /* 408 * Initialize for scan, set ni_startdir and bump ref on dp again 409 * because lookup() will dereference ni_startdir. 410 */ 411 412 cnp->cn_thread = p; 413 ndp->ni_startdir = dp; 414 ndp->ni_rootdir = rootvnode; 415 ndp->ni_topdir = NULL; 416 417 if (!lockleaf) 418 cnp->cn_flags |= LOCKLEAF; 419 for (;;) { 420 cnp->cn_nameptr = cnp->cn_pnbuf; 421 /* 422 * Call lookup() to do the real work. If an error occurs, 423 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 424 * we do not have to dereference anything before returning. 425 * In either case ni_startdir will be dereferenced and NULLed 426 * out. 427 */ 428 error = lookup(ndp); 429 if (error) 430 break; 431 432 /* 433 * Check for encountering a symbolic link. Trivial 434 * termination occurs if no symlink encountered. 435 */ 436 if ((cnp->cn_flags & ISSYMLINK) == 0) { 437 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 438 nfsvno_relpathbuf(ndp); 439 if (ndp->ni_vp && !lockleaf) 440 NFSVOPUNLOCK(ndp->ni_vp, 0); 441 break; 442 } 443 444 /* 445 * Validate symlink 446 */ 447 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 448 NFSVOPUNLOCK(ndp->ni_dvp, 0); 449 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 450 error = EINVAL; 451 goto badlink2; 452 } 453 454 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 455 error = ELOOP; 456 goto badlink2; 457 } 458 if (ndp->ni_pathlen > 1) 459 cp = uma_zalloc(namei_zone, M_WAITOK); 460 else 461 cp = cnp->cn_pnbuf; 462 aiov.iov_base = cp; 463 aiov.iov_len = MAXPATHLEN; 464 auio.uio_iov = &aiov; 465 auio.uio_iovcnt = 1; 466 auio.uio_offset = 0; 467 auio.uio_rw = UIO_READ; 468 auio.uio_segflg = UIO_SYSSPACE; 469 auio.uio_td = NULL; 470 auio.uio_resid = MAXPATHLEN; 471 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 472 if (error) { 473 badlink1: 474 if (ndp->ni_pathlen > 1) 475 uma_zfree(namei_zone, cp); 476 badlink2: 477 vrele(ndp->ni_dvp); 478 vput(ndp->ni_vp); 479 break; 480 } 481 linklen = MAXPATHLEN - auio.uio_resid; 482 if (linklen == 0) { 483 error = ENOENT; 484 goto badlink1; 485 } 486 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 487 error = ENAMETOOLONG; 488 goto badlink1; 489 } 490 491 /* 492 * Adjust or replace path 493 */ 494 if (ndp->ni_pathlen > 1) { 495 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 496 uma_zfree(namei_zone, cnp->cn_pnbuf); 497 cnp->cn_pnbuf = cp; 498 } else 499 cnp->cn_pnbuf[linklen] = '\0'; 500 ndp->ni_pathlen += linklen; 501 502 /* 503 * Cleanup refs for next loop and check if root directory 504 * should replace current directory. Normally ni_dvp 505 * becomes the new base directory and is cleaned up when 506 * we loop. Explicitly null pointers after invalidation 507 * to clarify operation. 508 */ 509 vput(ndp->ni_vp); 510 ndp->ni_vp = NULL; 511 512 if (cnp->cn_pnbuf[0] == '/') { 513 vrele(ndp->ni_dvp); 514 ndp->ni_dvp = ndp->ni_rootdir; 515 VREF(ndp->ni_dvp); 516 } 517 ndp->ni_startdir = ndp->ni_dvp; 518 ndp->ni_dvp = NULL; 519 } 520 if (!lockleaf) 521 cnp->cn_flags &= ~LOCKLEAF; 522 523 out: 524 if (error) { 525 nfsvno_relpathbuf(ndp); 526 ndp->ni_vp = NULL; 527 ndp->ni_dvp = NULL; 528 ndp->ni_startdir = NULL; 529 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 530 ndp->ni_dvp = NULL; 531 } 532 533 out1: 534 NFSEXITCODE2(error, nd); 535 return (error); 536 } 537 538 /* 539 * Set up a pathname buffer and return a pointer to it and, optionally 540 * set a hash pointer. 541 */ 542 void 543 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 544 { 545 struct componentname *cnp = &ndp->ni_cnd; 546 547 cnp->cn_flags |= (NOMACCHECK | HASBUF); 548 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 549 if (hashpp != NULL) 550 *hashpp = NULL; 551 *bufpp = cnp->cn_pnbuf; 552 } 553 554 /* 555 * Release the above path buffer, if not released by nfsvno_namei(). 556 */ 557 void 558 nfsvno_relpathbuf(struct nameidata *ndp) 559 { 560 561 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 562 panic("nfsrelpath"); 563 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 564 ndp->ni_cnd.cn_flags &= ~HASBUF; 565 } 566 567 /* 568 * Readlink vnode op into an mbuf list. 569 */ 570 int 571 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 572 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 573 { 574 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 575 struct iovec *ivp = iv; 576 struct uio io, *uiop = &io; 577 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 578 int i, len, tlen, error = 0; 579 580 len = 0; 581 i = 0; 582 while (len < NFS_MAXPATHLEN) { 583 NFSMGET(mp); 584 MCLGET(mp, M_WAITOK); 585 mp->m_len = M_SIZE(mp); 586 if (len == 0) { 587 mp3 = mp2 = mp; 588 } else { 589 mp2->m_next = mp; 590 mp2 = mp; 591 } 592 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 593 mp->m_len = NFS_MAXPATHLEN - len; 594 len = NFS_MAXPATHLEN; 595 } else { 596 len += mp->m_len; 597 } 598 ivp->iov_base = mtod(mp, caddr_t); 599 ivp->iov_len = mp->m_len; 600 i++; 601 ivp++; 602 } 603 uiop->uio_iov = iv; 604 uiop->uio_iovcnt = i; 605 uiop->uio_offset = 0; 606 uiop->uio_resid = len; 607 uiop->uio_rw = UIO_READ; 608 uiop->uio_segflg = UIO_SYSSPACE; 609 uiop->uio_td = NULL; 610 error = VOP_READLINK(vp, uiop, cred); 611 if (error) { 612 m_freem(mp3); 613 *lenp = 0; 614 goto out; 615 } 616 if (uiop->uio_resid > 0) { 617 len -= uiop->uio_resid; 618 tlen = NFSM_RNDUP(len); 619 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 620 } 621 *lenp = len; 622 *mpp = mp3; 623 *mpendp = mp; 624 625 out: 626 NFSEXITCODE(error); 627 return (error); 628 } 629 630 /* 631 * Read vnode op call into mbuf list. 632 */ 633 int 634 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 635 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 636 { 637 struct mbuf *m; 638 int i; 639 struct iovec *iv; 640 struct iovec *iv2; 641 int error = 0, len, left, siz, tlen, ioflag = 0; 642 struct mbuf *m2 = NULL, *m3; 643 struct uio io, *uiop = &io; 644 struct nfsheur *nh; 645 646 len = left = NFSM_RNDUP(cnt); 647 m3 = NULL; 648 /* 649 * Generate the mbuf list with the uio_iov ref. to it. 650 */ 651 i = 0; 652 while (left > 0) { 653 NFSMGET(m); 654 MCLGET(m, M_WAITOK); 655 m->m_len = 0; 656 siz = min(M_TRAILINGSPACE(m), left); 657 left -= siz; 658 i++; 659 if (m3) 660 m2->m_next = m; 661 else 662 m3 = m; 663 m2 = m; 664 } 665 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 666 M_TEMP, M_WAITOK); 667 uiop->uio_iov = iv2 = iv; 668 m = m3; 669 left = len; 670 i = 0; 671 while (left > 0) { 672 if (m == NULL) 673 panic("nfsvno_read iov"); 674 siz = min(M_TRAILINGSPACE(m), left); 675 if (siz > 0) { 676 iv->iov_base = mtod(m, caddr_t) + m->m_len; 677 iv->iov_len = siz; 678 m->m_len += siz; 679 left -= siz; 680 iv++; 681 i++; 682 } 683 m = m->m_next; 684 } 685 uiop->uio_iovcnt = i; 686 uiop->uio_offset = off; 687 uiop->uio_resid = len; 688 uiop->uio_rw = UIO_READ; 689 uiop->uio_segflg = UIO_SYSSPACE; 690 uiop->uio_td = NULL; 691 nh = nfsrv_sequential_heuristic(uiop, vp); 692 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 693 /* XXX KDM make this more systematic? */ 694 nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid; 695 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 696 FREE((caddr_t)iv2, M_TEMP); 697 if (error) { 698 m_freem(m3); 699 *mpp = NULL; 700 goto out; 701 } 702 nh->nh_nextoff = uiop->uio_offset; 703 tlen = len - uiop->uio_resid; 704 cnt = cnt < tlen ? cnt : tlen; 705 tlen = NFSM_RNDUP(cnt); 706 if (tlen == 0) { 707 m_freem(m3); 708 m3 = NULL; 709 } else if (len != tlen || tlen != cnt) 710 nfsrv_adj(m3, len - tlen, tlen - cnt); 711 *mpp = m3; 712 *mpendp = m2; 713 714 out: 715 NFSEXITCODE(error); 716 return (error); 717 } 718 719 /* 720 * Write vnode op from an mbuf list. 721 */ 722 int 723 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 724 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 725 { 726 struct iovec *ivp; 727 int i, len; 728 struct iovec *iv; 729 int ioflags, error; 730 struct uio io, *uiop = &io; 731 struct nfsheur *nh; 732 733 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 734 M_WAITOK); 735 uiop->uio_iov = iv = ivp; 736 uiop->uio_iovcnt = cnt; 737 i = mtod(mp, caddr_t) + mp->m_len - cp; 738 len = retlen; 739 while (len > 0) { 740 if (mp == NULL) 741 panic("nfsvno_write"); 742 if (i > 0) { 743 i = min(i, len); 744 ivp->iov_base = cp; 745 ivp->iov_len = i; 746 ivp++; 747 len -= i; 748 } 749 mp = mp->m_next; 750 if (mp) { 751 i = mp->m_len; 752 cp = mtod(mp, caddr_t); 753 } 754 } 755 756 if (stable == NFSWRITE_UNSTABLE) 757 ioflags = IO_NODELOCKED; 758 else 759 ioflags = (IO_SYNC | IO_NODELOCKED); 760 uiop->uio_resid = retlen; 761 uiop->uio_rw = UIO_WRITE; 762 uiop->uio_segflg = UIO_SYSSPACE; 763 NFSUIOPROC(uiop, p); 764 uiop->uio_offset = off; 765 nh = nfsrv_sequential_heuristic(uiop, vp); 766 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 767 /* XXX KDM make this more systematic? */ 768 nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid; 769 error = VOP_WRITE(vp, uiop, ioflags, cred); 770 if (error == 0) 771 nh->nh_nextoff = uiop->uio_offset; 772 FREE((caddr_t)iv, M_TEMP); 773 774 NFSEXITCODE(error); 775 return (error); 776 } 777 778 /* 779 * Common code for creating a regular file (plus special files for V2). 780 */ 781 int 782 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 783 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 784 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 785 { 786 u_quad_t tempsize; 787 int error; 788 789 error = nd->nd_repstat; 790 if (!error && ndp->ni_vp == NULL) { 791 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 792 vrele(ndp->ni_startdir); 793 error = VOP_CREATE(ndp->ni_dvp, 794 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 795 vput(ndp->ni_dvp); 796 nfsvno_relpathbuf(ndp); 797 if (!error) { 798 if (*exclusive_flagp) { 799 *exclusive_flagp = 0; 800 NFSVNO_ATTRINIT(nvap); 801 nvap->na_atime.tv_sec = cverf[0]; 802 nvap->na_atime.tv_nsec = cverf[1]; 803 error = VOP_SETATTR(ndp->ni_vp, 804 &nvap->na_vattr, nd->nd_cred); 805 if (error != 0) { 806 vput(ndp->ni_vp); 807 ndp->ni_vp = NULL; 808 error = NFSERR_NOTSUPP; 809 } 810 } 811 } 812 /* 813 * NFS V2 Only. nfsrvd_mknod() does this for V3. 814 * (This implies, just get out on an error.) 815 */ 816 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 817 nvap->na_type == VFIFO) { 818 if (nvap->na_type == VCHR && rdev == 0xffffffff) 819 nvap->na_type = VFIFO; 820 if (nvap->na_type != VFIFO && 821 (error = priv_check_cred(nd->nd_cred, 822 PRIV_VFS_MKNOD_DEV, 0))) { 823 vrele(ndp->ni_startdir); 824 nfsvno_relpathbuf(ndp); 825 vput(ndp->ni_dvp); 826 goto out; 827 } 828 nvap->na_rdev = rdev; 829 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 830 &ndp->ni_cnd, &nvap->na_vattr); 831 vput(ndp->ni_dvp); 832 nfsvno_relpathbuf(ndp); 833 vrele(ndp->ni_startdir); 834 if (error) 835 goto out; 836 } else { 837 vrele(ndp->ni_startdir); 838 nfsvno_relpathbuf(ndp); 839 vput(ndp->ni_dvp); 840 error = ENXIO; 841 goto out; 842 } 843 *vpp = ndp->ni_vp; 844 } else { 845 /* 846 * Handle cases where error is already set and/or 847 * the file exists. 848 * 1 - clean up the lookup 849 * 2 - iff !error and na_size set, truncate it 850 */ 851 vrele(ndp->ni_startdir); 852 nfsvno_relpathbuf(ndp); 853 *vpp = ndp->ni_vp; 854 if (ndp->ni_dvp == *vpp) 855 vrele(ndp->ni_dvp); 856 else 857 vput(ndp->ni_dvp); 858 if (!error && nvap->na_size != VNOVAL) { 859 error = nfsvno_accchk(*vpp, VWRITE, 860 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 861 NFSACCCHK_VPISLOCKED, NULL); 862 if (!error) { 863 tempsize = nvap->na_size; 864 NFSVNO_ATTRINIT(nvap); 865 nvap->na_size = tempsize; 866 error = VOP_SETATTR(*vpp, 867 &nvap->na_vattr, nd->nd_cred); 868 } 869 } 870 if (error) 871 vput(*vpp); 872 } 873 874 out: 875 NFSEXITCODE(error); 876 return (error); 877 } 878 879 /* 880 * Do a mknod vnode op. 881 */ 882 int 883 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 884 struct thread *p) 885 { 886 int error = 0; 887 enum vtype vtyp; 888 889 vtyp = nvap->na_type; 890 /* 891 * Iff doesn't exist, create it. 892 */ 893 if (ndp->ni_vp) { 894 vrele(ndp->ni_startdir); 895 nfsvno_relpathbuf(ndp); 896 vput(ndp->ni_dvp); 897 vrele(ndp->ni_vp); 898 error = EEXIST; 899 goto out; 900 } 901 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 902 vrele(ndp->ni_startdir); 903 nfsvno_relpathbuf(ndp); 904 vput(ndp->ni_dvp); 905 error = NFSERR_BADTYPE; 906 goto out; 907 } 908 if (vtyp == VSOCK) { 909 vrele(ndp->ni_startdir); 910 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 911 &ndp->ni_cnd, &nvap->na_vattr); 912 vput(ndp->ni_dvp); 913 nfsvno_relpathbuf(ndp); 914 } else { 915 if (nvap->na_type != VFIFO && 916 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 917 vrele(ndp->ni_startdir); 918 nfsvno_relpathbuf(ndp); 919 vput(ndp->ni_dvp); 920 goto out; 921 } 922 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 923 &ndp->ni_cnd, &nvap->na_vattr); 924 vput(ndp->ni_dvp); 925 nfsvno_relpathbuf(ndp); 926 vrele(ndp->ni_startdir); 927 /* 928 * Since VOP_MKNOD returns the ni_vp, I can't 929 * see any reason to do the lookup. 930 */ 931 } 932 933 out: 934 NFSEXITCODE(error); 935 return (error); 936 } 937 938 /* 939 * Mkdir vnode op. 940 */ 941 int 942 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 943 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 944 { 945 int error = 0; 946 947 if (ndp->ni_vp != NULL) { 948 if (ndp->ni_dvp == ndp->ni_vp) 949 vrele(ndp->ni_dvp); 950 else 951 vput(ndp->ni_dvp); 952 vrele(ndp->ni_vp); 953 nfsvno_relpathbuf(ndp); 954 error = EEXIST; 955 goto out; 956 } 957 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 958 &nvap->na_vattr); 959 vput(ndp->ni_dvp); 960 nfsvno_relpathbuf(ndp); 961 962 out: 963 NFSEXITCODE(error); 964 return (error); 965 } 966 967 /* 968 * symlink vnode op. 969 */ 970 int 971 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 972 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 973 struct nfsexstuff *exp) 974 { 975 int error = 0; 976 977 if (ndp->ni_vp) { 978 vrele(ndp->ni_startdir); 979 nfsvno_relpathbuf(ndp); 980 if (ndp->ni_dvp == ndp->ni_vp) 981 vrele(ndp->ni_dvp); 982 else 983 vput(ndp->ni_dvp); 984 vrele(ndp->ni_vp); 985 error = EEXIST; 986 goto out; 987 } 988 989 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 990 &nvap->na_vattr, pathcp); 991 vput(ndp->ni_dvp); 992 vrele(ndp->ni_startdir); 993 nfsvno_relpathbuf(ndp); 994 /* 995 * Although FreeBSD still had the lookup code in 996 * it for 7/current, there doesn't seem to be any 997 * point, since VOP_SYMLINK() returns the ni_vp. 998 * Just vput it for v2. 999 */ 1000 if (!not_v2 && !error) 1001 vput(ndp->ni_vp); 1002 1003 out: 1004 NFSEXITCODE(error); 1005 return (error); 1006 } 1007 1008 /* 1009 * Parse symbolic link arguments. 1010 * This function has an ugly side effect. It will MALLOC() an area for 1011 * the symlink and set iov_base to point to it, only if it succeeds. 1012 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1013 * be FREE'd later. 1014 */ 1015 int 1016 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1017 struct thread *p, char **pathcpp, int *lenp) 1018 { 1019 u_int32_t *tl; 1020 char *pathcp = NULL; 1021 int error = 0, len; 1022 struct nfsv2_sattr *sp; 1023 1024 *pathcpp = NULL; 1025 *lenp = 0; 1026 if ((nd->nd_flag & ND_NFSV3) && 1027 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1028 goto nfsmout; 1029 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1030 len = fxdr_unsigned(int, *tl); 1031 if (len > NFS_MAXPATHLEN || len <= 0) { 1032 error = EBADRPC; 1033 goto nfsmout; 1034 } 1035 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1036 error = nfsrv_mtostr(nd, pathcp, len); 1037 if (error) 1038 goto nfsmout; 1039 if (nd->nd_flag & ND_NFSV2) { 1040 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1041 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1042 } 1043 *pathcpp = pathcp; 1044 *lenp = len; 1045 NFSEXITCODE2(0, nd); 1046 return (0); 1047 nfsmout: 1048 if (pathcp) 1049 free(pathcp, M_TEMP); 1050 NFSEXITCODE2(error, nd); 1051 return (error); 1052 } 1053 1054 /* 1055 * Remove a non-directory object. 1056 */ 1057 int 1058 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1059 struct thread *p, struct nfsexstuff *exp) 1060 { 1061 struct vnode *vp; 1062 int error = 0; 1063 1064 vp = ndp->ni_vp; 1065 if (vp->v_type == VDIR) 1066 error = NFSERR_ISDIR; 1067 else if (is_v4) 1068 error = nfsrv_checkremove(vp, 1, p); 1069 if (!error) 1070 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1071 if (ndp->ni_dvp == vp) 1072 vrele(ndp->ni_dvp); 1073 else 1074 vput(ndp->ni_dvp); 1075 vput(vp); 1076 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1077 nfsvno_relpathbuf(ndp); 1078 NFSEXITCODE(error); 1079 return (error); 1080 } 1081 1082 /* 1083 * Remove a directory. 1084 */ 1085 int 1086 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1087 struct thread *p, struct nfsexstuff *exp) 1088 { 1089 struct vnode *vp; 1090 int error = 0; 1091 1092 vp = ndp->ni_vp; 1093 if (vp->v_type != VDIR) { 1094 error = ENOTDIR; 1095 goto out; 1096 } 1097 /* 1098 * No rmdir "." please. 1099 */ 1100 if (ndp->ni_dvp == vp) { 1101 error = EINVAL; 1102 goto out; 1103 } 1104 /* 1105 * The root of a mounted filesystem cannot be deleted. 1106 */ 1107 if (vp->v_vflag & VV_ROOT) 1108 error = EBUSY; 1109 out: 1110 if (!error) 1111 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1112 if (ndp->ni_dvp == vp) 1113 vrele(ndp->ni_dvp); 1114 else 1115 vput(ndp->ni_dvp); 1116 vput(vp); 1117 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1118 nfsvno_relpathbuf(ndp); 1119 NFSEXITCODE(error); 1120 return (error); 1121 } 1122 1123 /* 1124 * Rename vnode op. 1125 */ 1126 int 1127 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1128 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1129 { 1130 struct vnode *fvp, *tvp, *tdvp; 1131 int error = 0; 1132 1133 fvp = fromndp->ni_vp; 1134 if (ndstat) { 1135 vrele(fromndp->ni_dvp); 1136 vrele(fvp); 1137 error = ndstat; 1138 goto out1; 1139 } 1140 tdvp = tondp->ni_dvp; 1141 tvp = tondp->ni_vp; 1142 if (tvp != NULL) { 1143 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1144 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1145 goto out; 1146 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1147 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1148 goto out; 1149 } 1150 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1151 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1152 goto out; 1153 } 1154 1155 /* 1156 * A rename to '.' or '..' results in a prematurely 1157 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1158 * here. 1159 */ 1160 if ((tondp->ni_cnd.cn_namelen == 1 && 1161 tondp->ni_cnd.cn_nameptr[0] == '.') || 1162 (tondp->ni_cnd.cn_namelen == 2 && 1163 tondp->ni_cnd.cn_nameptr[0] == '.' && 1164 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1165 error = EINVAL; 1166 goto out; 1167 } 1168 } 1169 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1170 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1171 goto out; 1172 } 1173 if (fvp->v_mount != tdvp->v_mount) { 1174 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1175 goto out; 1176 } 1177 if (fvp == tdvp) { 1178 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1179 goto out; 1180 } 1181 if (fvp == tvp) { 1182 /* 1183 * If source and destination are the same, there is nothing to 1184 * do. Set error to -1 to indicate this. 1185 */ 1186 error = -1; 1187 goto out; 1188 } 1189 if (ndflag & ND_NFSV4) { 1190 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1191 error = nfsrv_checkremove(fvp, 0, p); 1192 NFSVOPUNLOCK(fvp, 0); 1193 } else 1194 error = EPERM; 1195 if (tvp && !error) 1196 error = nfsrv_checkremove(tvp, 1, p); 1197 } else { 1198 /* 1199 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1200 * that the NFSv4 client won't be confused by the rename. 1201 * Since nfsd_recalldelegation() can only be called on an 1202 * unlocked vnode at this point and fvp is the file that will 1203 * still exist after the rename, just do fvp. 1204 */ 1205 nfsd_recalldelegation(fvp, p); 1206 } 1207 out: 1208 if (!error) { 1209 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1210 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1211 &tondp->ni_cnd); 1212 } else { 1213 if (tdvp == tvp) 1214 vrele(tdvp); 1215 else 1216 vput(tdvp); 1217 if (tvp) 1218 vput(tvp); 1219 vrele(fromndp->ni_dvp); 1220 vrele(fvp); 1221 if (error == -1) 1222 error = 0; 1223 } 1224 vrele(tondp->ni_startdir); 1225 nfsvno_relpathbuf(tondp); 1226 out1: 1227 vrele(fromndp->ni_startdir); 1228 nfsvno_relpathbuf(fromndp); 1229 NFSEXITCODE(error); 1230 return (error); 1231 } 1232 1233 /* 1234 * Link vnode op. 1235 */ 1236 int 1237 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1238 struct thread *p, struct nfsexstuff *exp) 1239 { 1240 struct vnode *xp; 1241 int error = 0; 1242 1243 xp = ndp->ni_vp; 1244 if (xp != NULL) { 1245 error = EEXIST; 1246 } else { 1247 xp = ndp->ni_dvp; 1248 if (vp->v_mount != xp->v_mount) 1249 error = EXDEV; 1250 } 1251 if (!error) { 1252 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1253 if ((vp->v_iflag & VI_DOOMED) == 0) 1254 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1255 else 1256 error = EPERM; 1257 if (ndp->ni_dvp == vp) 1258 vrele(ndp->ni_dvp); 1259 else 1260 vput(ndp->ni_dvp); 1261 NFSVOPUNLOCK(vp, 0); 1262 } else { 1263 if (ndp->ni_dvp == ndp->ni_vp) 1264 vrele(ndp->ni_dvp); 1265 else 1266 vput(ndp->ni_dvp); 1267 if (ndp->ni_vp) 1268 vrele(ndp->ni_vp); 1269 } 1270 nfsvno_relpathbuf(ndp); 1271 NFSEXITCODE(error); 1272 return (error); 1273 } 1274 1275 /* 1276 * Do the fsync() appropriate for the commit. 1277 */ 1278 int 1279 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1280 struct thread *td) 1281 { 1282 int error = 0; 1283 1284 /* 1285 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1286 * file is done. At this time VOP_FSYNC does not accept offset and 1287 * byte count parameters so call VOP_FSYNC the whole file for now. 1288 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1289 * File systems that do not use the buffer cache (as indicated 1290 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1291 */ 1292 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1293 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1294 /* 1295 * Give up and do the whole thing 1296 */ 1297 if (vp->v_object && 1298 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1299 VM_OBJECT_WLOCK(vp->v_object); 1300 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1301 VM_OBJECT_WUNLOCK(vp->v_object); 1302 } 1303 error = VOP_FSYNC(vp, MNT_WAIT, td); 1304 } else { 1305 /* 1306 * Locate and synchronously write any buffers that fall 1307 * into the requested range. Note: we are assuming that 1308 * f_iosize is a power of 2. 1309 */ 1310 int iosize = vp->v_mount->mnt_stat.f_iosize; 1311 int iomask = iosize - 1; 1312 struct bufobj *bo; 1313 daddr_t lblkno; 1314 1315 /* 1316 * Align to iosize boundary, super-align to page boundary. 1317 */ 1318 if (off & iomask) { 1319 cnt += off & iomask; 1320 off &= ~(u_quad_t)iomask; 1321 } 1322 if (off & PAGE_MASK) { 1323 cnt += off & PAGE_MASK; 1324 off &= ~(u_quad_t)PAGE_MASK; 1325 } 1326 lblkno = off / iosize; 1327 1328 if (vp->v_object && 1329 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1330 VM_OBJECT_WLOCK(vp->v_object); 1331 vm_object_page_clean(vp->v_object, off, off + cnt, 1332 OBJPC_SYNC); 1333 VM_OBJECT_WUNLOCK(vp->v_object); 1334 } 1335 1336 bo = &vp->v_bufobj; 1337 BO_LOCK(bo); 1338 while (cnt > 0) { 1339 struct buf *bp; 1340 1341 /* 1342 * If we have a buffer and it is marked B_DELWRI we 1343 * have to lock and write it. Otherwise the prior 1344 * write is assumed to have already been committed. 1345 * 1346 * gbincore() can return invalid buffers now so we 1347 * have to check that bit as well (though B_DELWRI 1348 * should not be set if B_INVAL is set there could be 1349 * a race here since we haven't locked the buffer). 1350 */ 1351 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1352 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1353 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1354 BO_LOCK(bo); 1355 continue; /* retry */ 1356 } 1357 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1358 B_DELWRI) { 1359 bremfree(bp); 1360 bp->b_flags &= ~B_ASYNC; 1361 bwrite(bp); 1362 ++nfs_commit_miss; 1363 } else 1364 BUF_UNLOCK(bp); 1365 BO_LOCK(bo); 1366 } 1367 ++nfs_commit_blks; 1368 if (cnt < iosize) 1369 break; 1370 cnt -= iosize; 1371 ++lblkno; 1372 } 1373 BO_UNLOCK(bo); 1374 } 1375 NFSEXITCODE(error); 1376 return (error); 1377 } 1378 1379 /* 1380 * Statfs vnode op. 1381 */ 1382 int 1383 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1384 { 1385 int error; 1386 1387 error = VFS_STATFS(vp->v_mount, sf); 1388 if (error == 0) { 1389 /* 1390 * Since NFS handles these values as unsigned on the 1391 * wire, there is no way to represent negative values, 1392 * so set them to 0. Without this, they will appear 1393 * to be very large positive values for clients like 1394 * Solaris10. 1395 */ 1396 if (sf->f_bavail < 0) 1397 sf->f_bavail = 0; 1398 if (sf->f_ffree < 0) 1399 sf->f_ffree = 0; 1400 } 1401 NFSEXITCODE(error); 1402 return (error); 1403 } 1404 1405 /* 1406 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1407 * must handle nfsrv_opencheck() calls after any other access checks. 1408 */ 1409 void 1410 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1411 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1412 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1413 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1414 struct nfsexstuff *exp, struct vnode **vpp) 1415 { 1416 struct vnode *vp = NULL; 1417 u_quad_t tempsize; 1418 struct nfsexstuff nes; 1419 1420 if (ndp->ni_vp == NULL) 1421 nd->nd_repstat = nfsrv_opencheck(clientid, 1422 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1423 if (!nd->nd_repstat) { 1424 if (ndp->ni_vp == NULL) { 1425 vrele(ndp->ni_startdir); 1426 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1427 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1428 vput(ndp->ni_dvp); 1429 nfsvno_relpathbuf(ndp); 1430 if (!nd->nd_repstat) { 1431 if (*exclusive_flagp) { 1432 *exclusive_flagp = 0; 1433 NFSVNO_ATTRINIT(nvap); 1434 nvap->na_atime.tv_sec = cverf[0]; 1435 nvap->na_atime.tv_nsec = cverf[1]; 1436 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1437 &nvap->na_vattr, cred); 1438 if (nd->nd_repstat != 0) { 1439 vput(ndp->ni_vp); 1440 ndp->ni_vp = NULL; 1441 nd->nd_repstat = NFSERR_NOTSUPP; 1442 } else 1443 NFSSETBIT_ATTRBIT(attrbitp, 1444 NFSATTRBIT_TIMEACCESS); 1445 } else { 1446 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1447 aclp, p, attrbitp, exp); 1448 } 1449 } 1450 vp = ndp->ni_vp; 1451 } else { 1452 if (ndp->ni_startdir) 1453 vrele(ndp->ni_startdir); 1454 nfsvno_relpathbuf(ndp); 1455 vp = ndp->ni_vp; 1456 if (create == NFSV4OPEN_CREATE) { 1457 if (ndp->ni_dvp == vp) 1458 vrele(ndp->ni_dvp); 1459 else 1460 vput(ndp->ni_dvp); 1461 } 1462 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1463 if (ndp->ni_cnd.cn_flags & RDONLY) 1464 NFSVNO_SETEXRDONLY(&nes); 1465 else 1466 NFSVNO_EXINIT(&nes); 1467 nd->nd_repstat = nfsvno_accchk(vp, 1468 VWRITE, cred, &nes, p, 1469 NFSACCCHK_NOOVERRIDE, 1470 NFSACCCHK_VPISLOCKED, NULL); 1471 nd->nd_repstat = nfsrv_opencheck(clientid, 1472 stateidp, stp, vp, nd, p, nd->nd_repstat); 1473 if (!nd->nd_repstat) { 1474 tempsize = nvap->na_size; 1475 NFSVNO_ATTRINIT(nvap); 1476 nvap->na_size = tempsize; 1477 nd->nd_repstat = VOP_SETATTR(vp, 1478 &nvap->na_vattr, cred); 1479 } 1480 } else if (vp->v_type == VREG) { 1481 nd->nd_repstat = nfsrv_opencheck(clientid, 1482 stateidp, stp, vp, nd, p, nd->nd_repstat); 1483 } 1484 } 1485 } else { 1486 if (ndp->ni_cnd.cn_flags & HASBUF) 1487 nfsvno_relpathbuf(ndp); 1488 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1489 vrele(ndp->ni_startdir); 1490 if (ndp->ni_dvp == ndp->ni_vp) 1491 vrele(ndp->ni_dvp); 1492 else 1493 vput(ndp->ni_dvp); 1494 if (ndp->ni_vp) 1495 vput(ndp->ni_vp); 1496 } 1497 } 1498 *vpp = vp; 1499 1500 NFSEXITCODE2(0, nd); 1501 } 1502 1503 /* 1504 * Updates the file rev and sets the mtime and ctime 1505 * to the current clock time, returning the va_filerev and va_Xtime 1506 * values. 1507 * Return ESTALE to indicate the vnode is VI_DOOMED. 1508 */ 1509 int 1510 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1511 struct ucred *cred, struct thread *p) 1512 { 1513 struct vattr va; 1514 1515 VATTR_NULL(&va); 1516 vfs_timestamp(&va.va_mtime); 1517 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1518 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1519 if ((vp->v_iflag & VI_DOOMED) != 0) 1520 return (ESTALE); 1521 } 1522 (void) VOP_SETATTR(vp, &va, cred); 1523 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1524 return (0); 1525 } 1526 1527 /* 1528 * Glue routine to nfsv4_fillattr(). 1529 */ 1530 int 1531 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1532 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1533 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1534 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1535 { 1536 int error; 1537 1538 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1539 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1540 mounted_on_fileno); 1541 NFSEXITCODE2(0, nd); 1542 return (error); 1543 } 1544 1545 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1546 /* 1547 * nfs readdir service 1548 * - mallocs what it thinks is enough to read 1549 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1550 * - calls VOP_READDIR() 1551 * - loops around building the reply 1552 * if the output generated exceeds count break out of loop 1553 * The NFSM_CLGET macro is used here so that the reply will be packed 1554 * tightly in mbuf clusters. 1555 * - it trims out records with d_fileno == 0 1556 * this doesn't matter for Unix clients, but they might confuse clients 1557 * for other os'. 1558 * - it trims out records with d_type == DT_WHT 1559 * these cannot be seen through NFS (unless we extend the protocol) 1560 * The alternate call nfsrvd_readdirplus() does lookups as well. 1561 * PS: The NFS protocol spec. does not clarify what the "count" byte 1562 * argument is a count of.. just name strings and file id's or the 1563 * entire reply rpc or ... 1564 * I tried just file name and id sizes and it confused the Sun client, 1565 * so I am using the full rpc size now. The "paranoia.." comment refers 1566 * to including the status longwords that are not a part of the dir. 1567 * "entry" structures, but are in the rpc. 1568 */ 1569 int 1570 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1571 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1572 { 1573 struct dirent *dp; 1574 u_int32_t *tl; 1575 int dirlen; 1576 char *cpos, *cend, *rbuf; 1577 struct nfsvattr at; 1578 int nlen, error = 0, getret = 1; 1579 int siz, cnt, fullsiz, eofflag, ncookies; 1580 u_int64_t off, toff, verf; 1581 u_long *cookies = NULL, *cookiep; 1582 struct uio io; 1583 struct iovec iv; 1584 int is_ufs; 1585 1586 if (nd->nd_repstat) { 1587 nfsrv_postopattr(nd, getret, &at); 1588 goto out; 1589 } 1590 if (nd->nd_flag & ND_NFSV2) { 1591 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1592 off = fxdr_unsigned(u_quad_t, *tl++); 1593 } else { 1594 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1595 off = fxdr_hyper(tl); 1596 tl += 2; 1597 verf = fxdr_hyper(tl); 1598 tl += 2; 1599 } 1600 toff = off; 1601 cnt = fxdr_unsigned(int, *tl); 1602 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1603 cnt = NFS_SRVMAXDATA(nd); 1604 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1605 fullsiz = siz; 1606 if (nd->nd_flag & ND_NFSV3) { 1607 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1608 p, 1); 1609 #if 0 1610 /* 1611 * va_filerev is not sufficient as a cookie verifier, 1612 * since it is not supposed to change when entries are 1613 * removed/added unless that offset cookies returned to 1614 * the client are no longer valid. 1615 */ 1616 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1617 nd->nd_repstat = NFSERR_BAD_COOKIE; 1618 #endif 1619 } 1620 if (!nd->nd_repstat && vp->v_type != VDIR) 1621 nd->nd_repstat = NFSERR_NOTDIR; 1622 if (nd->nd_repstat == 0 && cnt == 0) { 1623 if (nd->nd_flag & ND_NFSV2) 1624 /* NFSv2 does not have NFSERR_TOOSMALL */ 1625 nd->nd_repstat = EPERM; 1626 else 1627 nd->nd_repstat = NFSERR_TOOSMALL; 1628 } 1629 if (!nd->nd_repstat) 1630 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1631 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1632 NFSACCCHK_VPISLOCKED, NULL); 1633 if (nd->nd_repstat) { 1634 vput(vp); 1635 if (nd->nd_flag & ND_NFSV3) 1636 nfsrv_postopattr(nd, getret, &at); 1637 goto out; 1638 } 1639 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1640 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1641 again: 1642 eofflag = 0; 1643 if (cookies) { 1644 free((caddr_t)cookies, M_TEMP); 1645 cookies = NULL; 1646 } 1647 1648 iv.iov_base = rbuf; 1649 iv.iov_len = siz; 1650 io.uio_iov = &iv; 1651 io.uio_iovcnt = 1; 1652 io.uio_offset = (off_t)off; 1653 io.uio_resid = siz; 1654 io.uio_segflg = UIO_SYSSPACE; 1655 io.uio_rw = UIO_READ; 1656 io.uio_td = NULL; 1657 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1658 &cookies); 1659 off = (u_int64_t)io.uio_offset; 1660 if (io.uio_resid) 1661 siz -= io.uio_resid; 1662 1663 if (!cookies && !nd->nd_repstat) 1664 nd->nd_repstat = NFSERR_PERM; 1665 if (nd->nd_flag & ND_NFSV3) { 1666 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1667 if (!nd->nd_repstat) 1668 nd->nd_repstat = getret; 1669 } 1670 1671 /* 1672 * Handles the failed cases. nd->nd_repstat == 0 past here. 1673 */ 1674 if (nd->nd_repstat) { 1675 vput(vp); 1676 free((caddr_t)rbuf, M_TEMP); 1677 if (cookies) 1678 free((caddr_t)cookies, M_TEMP); 1679 if (nd->nd_flag & ND_NFSV3) 1680 nfsrv_postopattr(nd, getret, &at); 1681 goto out; 1682 } 1683 /* 1684 * If nothing read, return eof 1685 * rpc reply 1686 */ 1687 if (siz == 0) { 1688 vput(vp); 1689 if (nd->nd_flag & ND_NFSV2) { 1690 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1691 } else { 1692 nfsrv_postopattr(nd, getret, &at); 1693 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1694 txdr_hyper(at.na_filerev, tl); 1695 tl += 2; 1696 } 1697 *tl++ = newnfs_false; 1698 *tl = newnfs_true; 1699 FREE((caddr_t)rbuf, M_TEMP); 1700 FREE((caddr_t)cookies, M_TEMP); 1701 goto out; 1702 } 1703 1704 /* 1705 * Check for degenerate cases of nothing useful read. 1706 * If so go try again 1707 */ 1708 cpos = rbuf; 1709 cend = rbuf + siz; 1710 dp = (struct dirent *)cpos; 1711 cookiep = cookies; 1712 1713 /* 1714 * For some reason FreeBSD's ufs_readdir() chooses to back the 1715 * directory offset up to a block boundary, so it is necessary to 1716 * skip over the records that precede the requested offset. This 1717 * requires the assumption that file offset cookies monotonically 1718 * increase. 1719 */ 1720 while (cpos < cend && ncookies > 0 && 1721 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1722 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 1723 cpos += dp->d_reclen; 1724 dp = (struct dirent *)cpos; 1725 cookiep++; 1726 ncookies--; 1727 } 1728 if (cpos >= cend || ncookies == 0) { 1729 siz = fullsiz; 1730 toff = off; 1731 goto again; 1732 } 1733 vput(vp); 1734 1735 /* 1736 * dirlen is the size of the reply, including all XDR and must 1737 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1738 * if the XDR should be included in "count", but to be safe, we do. 1739 * (Include the two booleans at the end of the reply in dirlen now.) 1740 */ 1741 if (nd->nd_flag & ND_NFSV3) { 1742 nfsrv_postopattr(nd, getret, &at); 1743 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1744 txdr_hyper(at.na_filerev, tl); 1745 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1746 } else { 1747 dirlen = 2 * NFSX_UNSIGNED; 1748 } 1749 1750 /* Loop through the records and build reply */ 1751 while (cpos < cend && ncookies > 0) { 1752 nlen = dp->d_namlen; 1753 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1754 nlen <= NFS_MAXNAMLEN) { 1755 if (nd->nd_flag & ND_NFSV3) 1756 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1757 else 1758 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1759 if (dirlen > cnt) { 1760 eofflag = 0; 1761 break; 1762 } 1763 1764 /* 1765 * Build the directory record xdr from 1766 * the dirent entry. 1767 */ 1768 if (nd->nd_flag & ND_NFSV3) { 1769 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1770 *tl++ = newnfs_true; 1771 *tl++ = 0; 1772 } else { 1773 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1774 *tl++ = newnfs_true; 1775 } 1776 *tl = txdr_unsigned(dp->d_fileno); 1777 (void) nfsm_strtom(nd, dp->d_name, nlen); 1778 if (nd->nd_flag & ND_NFSV3) { 1779 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1780 *tl++ = 0; 1781 } else 1782 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1783 *tl = txdr_unsigned(*cookiep); 1784 } 1785 cpos += dp->d_reclen; 1786 dp = (struct dirent *)cpos; 1787 cookiep++; 1788 ncookies--; 1789 } 1790 if (cpos < cend) 1791 eofflag = 0; 1792 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1793 *tl++ = newnfs_false; 1794 if (eofflag) 1795 *tl = newnfs_true; 1796 else 1797 *tl = newnfs_false; 1798 FREE((caddr_t)rbuf, M_TEMP); 1799 FREE((caddr_t)cookies, M_TEMP); 1800 1801 out: 1802 NFSEXITCODE2(0, nd); 1803 return (0); 1804 nfsmout: 1805 vput(vp); 1806 NFSEXITCODE2(error, nd); 1807 return (error); 1808 } 1809 1810 /* 1811 * Readdirplus for V3 and Readdir for V4. 1812 */ 1813 int 1814 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1815 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1816 { 1817 struct dirent *dp; 1818 u_int32_t *tl; 1819 int dirlen; 1820 char *cpos, *cend, *rbuf; 1821 struct vnode *nvp; 1822 fhandle_t nfh; 1823 struct nfsvattr nva, at, *nvap = &nva; 1824 struct mbuf *mb0, *mb1; 1825 struct nfsreferral *refp; 1826 int nlen, r, error = 0, getret = 1, usevget = 1; 1827 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1828 caddr_t bpos0, bpos1; 1829 u_int64_t off, toff, verf; 1830 u_long *cookies = NULL, *cookiep; 1831 nfsattrbit_t attrbits, rderrbits, savbits; 1832 struct uio io; 1833 struct iovec iv; 1834 struct componentname cn; 1835 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 1836 struct mount *mp, *new_mp; 1837 uint64_t mounted_on_fileno; 1838 1839 if (nd->nd_repstat) { 1840 nfsrv_postopattr(nd, getret, &at); 1841 goto out; 1842 } 1843 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1844 off = fxdr_hyper(tl); 1845 toff = off; 1846 tl += 2; 1847 verf = fxdr_hyper(tl); 1848 tl += 2; 1849 siz = fxdr_unsigned(int, *tl++); 1850 cnt = fxdr_unsigned(int, *tl); 1851 1852 /* 1853 * Use the server's maximum data transfer size as the upper bound 1854 * on reply datalen. 1855 */ 1856 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1857 cnt = NFS_SRVMAXDATA(nd); 1858 1859 /* 1860 * siz is a "hint" of how much directory information (name, fileid, 1861 * cookie) should be in the reply. At least one client "hints" 0, 1862 * so I set it to cnt for that case. I also round it up to the 1863 * next multiple of DIRBLKSIZ. 1864 */ 1865 if (siz <= 0) 1866 siz = cnt; 1867 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1868 1869 if (nd->nd_flag & ND_NFSV4) { 1870 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1871 if (error) 1872 goto nfsmout; 1873 NFSSET_ATTRBIT(&savbits, &attrbits); 1874 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1875 NFSZERO_ATTRBIT(&rderrbits); 1876 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1877 } else { 1878 NFSZERO_ATTRBIT(&attrbits); 1879 } 1880 fullsiz = siz; 1881 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1882 if (!nd->nd_repstat) { 1883 if (off && verf != at.na_filerev) { 1884 /* 1885 * va_filerev is not sufficient as a cookie verifier, 1886 * since it is not supposed to change when entries are 1887 * removed/added unless that offset cookies returned to 1888 * the client are no longer valid. 1889 */ 1890 #if 0 1891 if (nd->nd_flag & ND_NFSV4) { 1892 nd->nd_repstat = NFSERR_NOTSAME; 1893 } else { 1894 nd->nd_repstat = NFSERR_BAD_COOKIE; 1895 } 1896 #endif 1897 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1898 nd->nd_repstat = NFSERR_BAD_COOKIE; 1899 } 1900 } 1901 if (!nd->nd_repstat && vp->v_type != VDIR) 1902 nd->nd_repstat = NFSERR_NOTDIR; 1903 if (!nd->nd_repstat && cnt == 0) 1904 nd->nd_repstat = NFSERR_TOOSMALL; 1905 if (!nd->nd_repstat) 1906 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1907 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1908 NFSACCCHK_VPISLOCKED, NULL); 1909 if (nd->nd_repstat) { 1910 vput(vp); 1911 if (nd->nd_flag & ND_NFSV3) 1912 nfsrv_postopattr(nd, getret, &at); 1913 goto out; 1914 } 1915 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1916 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 1917 1918 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1919 again: 1920 eofflag = 0; 1921 if (cookies) { 1922 free((caddr_t)cookies, M_TEMP); 1923 cookies = NULL; 1924 } 1925 1926 iv.iov_base = rbuf; 1927 iv.iov_len = siz; 1928 io.uio_iov = &iv; 1929 io.uio_iovcnt = 1; 1930 io.uio_offset = (off_t)off; 1931 io.uio_resid = siz; 1932 io.uio_segflg = UIO_SYSSPACE; 1933 io.uio_rw = UIO_READ; 1934 io.uio_td = NULL; 1935 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1936 &cookies); 1937 off = (u_int64_t)io.uio_offset; 1938 if (io.uio_resid) 1939 siz -= io.uio_resid; 1940 1941 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1942 1943 if (!cookies && !nd->nd_repstat) 1944 nd->nd_repstat = NFSERR_PERM; 1945 if (!nd->nd_repstat) 1946 nd->nd_repstat = getret; 1947 if (nd->nd_repstat) { 1948 vput(vp); 1949 if (cookies) 1950 free((caddr_t)cookies, M_TEMP); 1951 free((caddr_t)rbuf, M_TEMP); 1952 if (nd->nd_flag & ND_NFSV3) 1953 nfsrv_postopattr(nd, getret, &at); 1954 goto out; 1955 } 1956 /* 1957 * If nothing read, return eof 1958 * rpc reply 1959 */ 1960 if (siz == 0) { 1961 vput(vp); 1962 if (nd->nd_flag & ND_NFSV3) 1963 nfsrv_postopattr(nd, getret, &at); 1964 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1965 txdr_hyper(at.na_filerev, tl); 1966 tl += 2; 1967 *tl++ = newnfs_false; 1968 *tl = newnfs_true; 1969 free((caddr_t)cookies, M_TEMP); 1970 free((caddr_t)rbuf, M_TEMP); 1971 goto out; 1972 } 1973 1974 /* 1975 * Check for degenerate cases of nothing useful read. 1976 * If so go try again 1977 */ 1978 cpos = rbuf; 1979 cend = rbuf + siz; 1980 dp = (struct dirent *)cpos; 1981 cookiep = cookies; 1982 1983 /* 1984 * For some reason FreeBSD's ufs_readdir() chooses to back the 1985 * directory offset up to a block boundary, so it is necessary to 1986 * skip over the records that precede the requested offset. This 1987 * requires the assumption that file offset cookies monotonically 1988 * increase. 1989 */ 1990 while (cpos < cend && ncookies > 0 && 1991 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1992 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 1993 ((nd->nd_flag & ND_NFSV4) && 1994 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1995 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1996 cpos += dp->d_reclen; 1997 dp = (struct dirent *)cpos; 1998 cookiep++; 1999 ncookies--; 2000 } 2001 if (cpos >= cend || ncookies == 0) { 2002 siz = fullsiz; 2003 toff = off; 2004 goto again; 2005 } 2006 2007 /* 2008 * Busy the file system so that the mount point won't go away 2009 * and, as such, VFS_VGET() can be used safely. 2010 */ 2011 mp = vp->v_mount; 2012 vfs_ref(mp); 2013 NFSVOPUNLOCK(vp, 0); 2014 nd->nd_repstat = vfs_busy(mp, 0); 2015 vfs_rel(mp); 2016 if (nd->nd_repstat != 0) { 2017 vrele(vp); 2018 free(cookies, M_TEMP); 2019 free(rbuf, M_TEMP); 2020 if (nd->nd_flag & ND_NFSV3) 2021 nfsrv_postopattr(nd, getret, &at); 2022 goto out; 2023 } 2024 2025 /* 2026 * Check to see if entries in this directory can be safely acquired 2027 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2028 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2029 * automount of the snapshot directory that is required will 2030 * be done. 2031 * This needs to be done here for NFSv4, since NFSv4 never does 2032 * a VFS_VGET() for "." or "..". 2033 */ 2034 if (is_zfs == 1) { 2035 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2036 if (r == EOPNOTSUPP) { 2037 usevget = 0; 2038 cn.cn_nameiop = LOOKUP; 2039 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2040 cn.cn_cred = nd->nd_cred; 2041 cn.cn_thread = p; 2042 } else if (r == 0) 2043 vput(nvp); 2044 } 2045 2046 /* 2047 * Save this position, in case there is an error before one entry 2048 * is created. 2049 */ 2050 mb0 = nd->nd_mb; 2051 bpos0 = nd->nd_bpos; 2052 2053 /* 2054 * Fill in the first part of the reply. 2055 * dirlen is the reply length in bytes and cannot exceed cnt. 2056 * (Include the two booleans at the end of the reply in dirlen now, 2057 * so we recognize when we have exceeded cnt.) 2058 */ 2059 if (nd->nd_flag & ND_NFSV3) { 2060 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2061 nfsrv_postopattr(nd, getret, &at); 2062 } else { 2063 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2064 } 2065 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2066 txdr_hyper(at.na_filerev, tl); 2067 2068 /* 2069 * Save this position, in case there is an empty reply needed. 2070 */ 2071 mb1 = nd->nd_mb; 2072 bpos1 = nd->nd_bpos; 2073 2074 /* Loop through the records and build reply */ 2075 entrycnt = 0; 2076 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2077 nlen = dp->d_namlen; 2078 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2079 nlen <= NFS_MAXNAMLEN && 2080 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2081 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2082 || (nlen == 1 && dp->d_name[0] != '.'))) { 2083 /* 2084 * Save the current position in the reply, in case 2085 * this entry exceeds cnt. 2086 */ 2087 mb1 = nd->nd_mb; 2088 bpos1 = nd->nd_bpos; 2089 2090 /* 2091 * For readdir_and_lookup get the vnode using 2092 * the file number. 2093 */ 2094 nvp = NULL; 2095 refp = NULL; 2096 r = 0; 2097 at_root = 0; 2098 needs_unbusy = 0; 2099 new_mp = mp; 2100 mounted_on_fileno = (uint64_t)dp->d_fileno; 2101 if ((nd->nd_flag & ND_NFSV3) || 2102 NFSNONZERO_ATTRBIT(&savbits)) { 2103 if (nd->nd_flag & ND_NFSV4) 2104 refp = nfsv4root_getreferral(NULL, 2105 vp, dp->d_fileno); 2106 if (refp == NULL) { 2107 if (usevget) 2108 r = VFS_VGET(mp, dp->d_fileno, 2109 LK_SHARED, &nvp); 2110 else 2111 r = EOPNOTSUPP; 2112 if (r == EOPNOTSUPP) { 2113 if (usevget) { 2114 usevget = 0; 2115 cn.cn_nameiop = LOOKUP; 2116 cn.cn_lkflags = 2117 LK_SHARED | 2118 LK_RETRY; 2119 cn.cn_cred = 2120 nd->nd_cred; 2121 cn.cn_thread = p; 2122 } 2123 cn.cn_nameptr = dp->d_name; 2124 cn.cn_namelen = nlen; 2125 cn.cn_flags = ISLASTCN | 2126 NOFOLLOW | LOCKLEAF; 2127 if (nlen == 2 && 2128 dp->d_name[0] == '.' && 2129 dp->d_name[1] == '.') 2130 cn.cn_flags |= 2131 ISDOTDOT; 2132 if (NFSVOPLOCK(vp, LK_SHARED) 2133 != 0) { 2134 nd->nd_repstat = EPERM; 2135 break; 2136 } 2137 if ((vp->v_vflag & VV_ROOT) != 0 2138 && (cn.cn_flags & ISDOTDOT) 2139 != 0) { 2140 vref(vp); 2141 nvp = vp; 2142 r = 0; 2143 } else { 2144 r = VOP_LOOKUP(vp, &nvp, 2145 &cn); 2146 if (vp != nvp) 2147 NFSVOPUNLOCK(vp, 2148 0); 2149 } 2150 } 2151 2152 /* 2153 * For NFSv4, check to see if nvp is 2154 * a mount point and get the mount 2155 * point vnode, as required. 2156 */ 2157 if (r == 0 && 2158 nfsrv_enable_crossmntpt != 0 && 2159 (nd->nd_flag & ND_NFSV4) != 0 && 2160 nvp->v_type == VDIR && 2161 nvp->v_mountedhere != NULL) { 2162 new_mp = nvp->v_mountedhere; 2163 r = vfs_busy(new_mp, 0); 2164 vput(nvp); 2165 nvp = NULL; 2166 if (r == 0) { 2167 r = VFS_ROOT(new_mp, 2168 LK_SHARED, &nvp); 2169 needs_unbusy = 1; 2170 if (r == 0) 2171 at_root = 1; 2172 } 2173 } 2174 } 2175 if (!r) { 2176 if (refp == NULL && 2177 ((nd->nd_flag & ND_NFSV3) || 2178 NFSNONZERO_ATTRBIT(&attrbits))) { 2179 r = nfsvno_getfh(nvp, &nfh, p); 2180 if (!r) 2181 r = nfsvno_getattr(nvp, nvap, 2182 nd->nd_cred, p, 1); 2183 if (r == 0 && is_zfs == 1 && 2184 nfsrv_enable_crossmntpt != 0 && 2185 (nd->nd_flag & ND_NFSV4) != 0 && 2186 nvp->v_type == VDIR && 2187 vp->v_mount != nvp->v_mount) { 2188 /* 2189 * For a ZFS snapshot, there is a 2190 * pseudo mount that does not set 2191 * v_mountedhere, so it needs to 2192 * be detected via a different 2193 * mount structure. 2194 */ 2195 at_root = 1; 2196 if (new_mp == mp) 2197 new_mp = nvp->v_mount; 2198 } 2199 } 2200 } else { 2201 nvp = NULL; 2202 } 2203 if (r) { 2204 if (!NFSISSET_ATTRBIT(&attrbits, 2205 NFSATTRBIT_RDATTRERROR)) { 2206 if (nvp != NULL) 2207 vput(nvp); 2208 if (needs_unbusy != 0) 2209 vfs_unbusy(new_mp); 2210 nd->nd_repstat = r; 2211 break; 2212 } 2213 } 2214 } 2215 2216 /* 2217 * Build the directory record xdr 2218 */ 2219 if (nd->nd_flag & ND_NFSV3) { 2220 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2221 *tl++ = newnfs_true; 2222 *tl++ = 0; 2223 *tl = txdr_unsigned(dp->d_fileno); 2224 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2225 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2226 *tl++ = 0; 2227 *tl = txdr_unsigned(*cookiep); 2228 nfsrv_postopattr(nd, 0, nvap); 2229 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2230 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2231 if (nvp != NULL) 2232 vput(nvp); 2233 } else { 2234 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2235 *tl++ = newnfs_true; 2236 *tl++ = 0; 2237 *tl = txdr_unsigned(*cookiep); 2238 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2239 if (nvp != NULL) { 2240 supports_nfsv4acls = 2241 nfs_supportsnfsv4acls(nvp); 2242 NFSVOPUNLOCK(nvp, 0); 2243 } else 2244 supports_nfsv4acls = 0; 2245 if (refp != NULL) { 2246 dirlen += nfsrv_putreferralattr(nd, 2247 &savbits, refp, 0, 2248 &nd->nd_repstat); 2249 if (nd->nd_repstat) { 2250 if (nvp != NULL) 2251 vrele(nvp); 2252 if (needs_unbusy != 0) 2253 vfs_unbusy(new_mp); 2254 break; 2255 } 2256 } else if (r) { 2257 dirlen += nfsvno_fillattr(nd, new_mp, 2258 nvp, nvap, &nfh, r, &rderrbits, 2259 nd->nd_cred, p, isdgram, 0, 2260 supports_nfsv4acls, at_root, 2261 mounted_on_fileno); 2262 } else { 2263 dirlen += nfsvno_fillattr(nd, new_mp, 2264 nvp, nvap, &nfh, r, &attrbits, 2265 nd->nd_cred, p, isdgram, 0, 2266 supports_nfsv4acls, at_root, 2267 mounted_on_fileno); 2268 } 2269 if (nvp != NULL) 2270 vrele(nvp); 2271 dirlen += (3 * NFSX_UNSIGNED); 2272 } 2273 if (needs_unbusy != 0) 2274 vfs_unbusy(new_mp); 2275 if (dirlen <= cnt) 2276 entrycnt++; 2277 } 2278 cpos += dp->d_reclen; 2279 dp = (struct dirent *)cpos; 2280 cookiep++; 2281 ncookies--; 2282 } 2283 vrele(vp); 2284 vfs_unbusy(mp); 2285 2286 /* 2287 * If dirlen > cnt, we must strip off the last entry. If that 2288 * results in an empty reply, report NFSERR_TOOSMALL. 2289 */ 2290 if (dirlen > cnt || nd->nd_repstat) { 2291 if (!nd->nd_repstat && entrycnt == 0) 2292 nd->nd_repstat = NFSERR_TOOSMALL; 2293 if (nd->nd_repstat) { 2294 newnfs_trimtrailing(nd, mb0, bpos0); 2295 if (nd->nd_flag & ND_NFSV3) 2296 nfsrv_postopattr(nd, getret, &at); 2297 } else 2298 newnfs_trimtrailing(nd, mb1, bpos1); 2299 eofflag = 0; 2300 } else if (cpos < cend) 2301 eofflag = 0; 2302 if (!nd->nd_repstat) { 2303 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2304 *tl++ = newnfs_false; 2305 if (eofflag) 2306 *tl = newnfs_true; 2307 else 2308 *tl = newnfs_false; 2309 } 2310 FREE((caddr_t)cookies, M_TEMP); 2311 FREE((caddr_t)rbuf, M_TEMP); 2312 2313 out: 2314 NFSEXITCODE2(0, nd); 2315 return (0); 2316 nfsmout: 2317 vput(vp); 2318 NFSEXITCODE2(error, nd); 2319 return (error); 2320 } 2321 2322 /* 2323 * Get the settable attributes out of the mbuf list. 2324 * (Return 0 or EBADRPC) 2325 */ 2326 int 2327 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2328 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2329 { 2330 u_int32_t *tl; 2331 struct nfsv2_sattr *sp; 2332 int error = 0, toclient = 0; 2333 2334 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2335 case ND_NFSV2: 2336 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2337 /* 2338 * Some old clients didn't fill in the high order 16bits. 2339 * --> check the low order 2 bytes for 0xffff 2340 */ 2341 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2342 nvap->na_mode = nfstov_mode(sp->sa_mode); 2343 if (sp->sa_uid != newnfs_xdrneg1) 2344 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2345 if (sp->sa_gid != newnfs_xdrneg1) 2346 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2347 if (sp->sa_size != newnfs_xdrneg1) 2348 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2349 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2350 #ifdef notyet 2351 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2352 #else 2353 nvap->na_atime.tv_sec = 2354 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2355 nvap->na_atime.tv_nsec = 0; 2356 #endif 2357 } 2358 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2359 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2360 break; 2361 case ND_NFSV3: 2362 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2363 if (*tl == newnfs_true) { 2364 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2365 nvap->na_mode = nfstov_mode(*tl); 2366 } 2367 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2368 if (*tl == newnfs_true) { 2369 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2370 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2371 } 2372 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2373 if (*tl == newnfs_true) { 2374 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2375 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2376 } 2377 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2378 if (*tl == newnfs_true) { 2379 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2380 nvap->na_size = fxdr_hyper(tl); 2381 } 2382 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2383 switch (fxdr_unsigned(int, *tl)) { 2384 case NFSV3SATTRTIME_TOCLIENT: 2385 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2386 fxdr_nfsv3time(tl, &nvap->na_atime); 2387 toclient = 1; 2388 break; 2389 case NFSV3SATTRTIME_TOSERVER: 2390 vfs_timestamp(&nvap->na_atime); 2391 nvap->na_vaflags |= VA_UTIMES_NULL; 2392 break; 2393 } 2394 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2395 switch (fxdr_unsigned(int, *tl)) { 2396 case NFSV3SATTRTIME_TOCLIENT: 2397 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2398 fxdr_nfsv3time(tl, &nvap->na_mtime); 2399 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2400 break; 2401 case NFSV3SATTRTIME_TOSERVER: 2402 vfs_timestamp(&nvap->na_mtime); 2403 if (!toclient) 2404 nvap->na_vaflags |= VA_UTIMES_NULL; 2405 break; 2406 } 2407 break; 2408 case ND_NFSV4: 2409 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2410 } 2411 nfsmout: 2412 NFSEXITCODE2(error, nd); 2413 return (error); 2414 } 2415 2416 /* 2417 * Handle the setable attributes for V4. 2418 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2419 */ 2420 int 2421 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2422 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2423 { 2424 u_int32_t *tl; 2425 int attrsum = 0; 2426 int i, j; 2427 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2428 int toclient = 0; 2429 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2430 uid_t uid; 2431 gid_t gid; 2432 2433 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2434 if (error) 2435 goto nfsmout; 2436 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2437 attrsize = fxdr_unsigned(int, *tl); 2438 2439 /* 2440 * Loop around getting the setable attributes. If an unsupported 2441 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2442 */ 2443 if (retnotsup) { 2444 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2445 bitpos = NFSATTRBIT_MAX; 2446 } else { 2447 bitpos = 0; 2448 } 2449 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2450 if (attrsum > attrsize) { 2451 error = NFSERR_BADXDR; 2452 goto nfsmout; 2453 } 2454 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2455 switch (bitpos) { 2456 case NFSATTRBIT_SIZE: 2457 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2458 if (vp != NULL && vp->v_type != VREG) { 2459 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2460 NFSERR_INVAL; 2461 goto nfsmout; 2462 } 2463 nvap->na_size = fxdr_hyper(tl); 2464 attrsum += NFSX_HYPER; 2465 break; 2466 case NFSATTRBIT_ACL: 2467 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2468 p); 2469 if (error) 2470 goto nfsmout; 2471 if (aceerr && !nd->nd_repstat) 2472 nd->nd_repstat = aceerr; 2473 attrsum += aclsize; 2474 break; 2475 case NFSATTRBIT_ARCHIVE: 2476 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2477 if (!nd->nd_repstat) 2478 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2479 attrsum += NFSX_UNSIGNED; 2480 break; 2481 case NFSATTRBIT_HIDDEN: 2482 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2483 if (!nd->nd_repstat) 2484 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2485 attrsum += NFSX_UNSIGNED; 2486 break; 2487 case NFSATTRBIT_MIMETYPE: 2488 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2489 i = fxdr_unsigned(int, *tl); 2490 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2491 if (error) 2492 goto nfsmout; 2493 if (!nd->nd_repstat) 2494 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2495 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2496 break; 2497 case NFSATTRBIT_MODE: 2498 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2499 nvap->na_mode = nfstov_mode(*tl); 2500 attrsum += NFSX_UNSIGNED; 2501 break; 2502 case NFSATTRBIT_OWNER: 2503 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2504 j = fxdr_unsigned(int, *tl); 2505 if (j < 0) { 2506 error = NFSERR_BADXDR; 2507 goto nfsmout; 2508 } 2509 if (j > NFSV4_SMALLSTR) 2510 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2511 else 2512 cp = namestr; 2513 error = nfsrv_mtostr(nd, cp, j); 2514 if (error) { 2515 if (j > NFSV4_SMALLSTR) 2516 free(cp, M_NFSSTRING); 2517 goto nfsmout; 2518 } 2519 if (!nd->nd_repstat) { 2520 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2521 p); 2522 if (!nd->nd_repstat) 2523 nvap->na_uid = uid; 2524 } 2525 if (j > NFSV4_SMALLSTR) 2526 free(cp, M_NFSSTRING); 2527 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2528 break; 2529 case NFSATTRBIT_OWNERGROUP: 2530 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2531 j = fxdr_unsigned(int, *tl); 2532 if (j < 0) { 2533 error = NFSERR_BADXDR; 2534 goto nfsmout; 2535 } 2536 if (j > NFSV4_SMALLSTR) 2537 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2538 else 2539 cp = namestr; 2540 error = nfsrv_mtostr(nd, cp, j); 2541 if (error) { 2542 if (j > NFSV4_SMALLSTR) 2543 free(cp, M_NFSSTRING); 2544 goto nfsmout; 2545 } 2546 if (!nd->nd_repstat) { 2547 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2548 p); 2549 if (!nd->nd_repstat) 2550 nvap->na_gid = gid; 2551 } 2552 if (j > NFSV4_SMALLSTR) 2553 free(cp, M_NFSSTRING); 2554 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2555 break; 2556 case NFSATTRBIT_SYSTEM: 2557 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2558 if (!nd->nd_repstat) 2559 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2560 attrsum += NFSX_UNSIGNED; 2561 break; 2562 case NFSATTRBIT_TIMEACCESSSET: 2563 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2564 attrsum += NFSX_UNSIGNED; 2565 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2566 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2567 fxdr_nfsv4time(tl, &nvap->na_atime); 2568 toclient = 1; 2569 attrsum += NFSX_V4TIME; 2570 } else { 2571 vfs_timestamp(&nvap->na_atime); 2572 nvap->na_vaflags |= VA_UTIMES_NULL; 2573 } 2574 break; 2575 case NFSATTRBIT_TIMEBACKUP: 2576 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2577 if (!nd->nd_repstat) 2578 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2579 attrsum += NFSX_V4TIME; 2580 break; 2581 case NFSATTRBIT_TIMECREATE: 2582 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2583 if (!nd->nd_repstat) 2584 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2585 attrsum += NFSX_V4TIME; 2586 break; 2587 case NFSATTRBIT_TIMEMODIFYSET: 2588 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2589 attrsum += NFSX_UNSIGNED; 2590 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2591 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2592 fxdr_nfsv4time(tl, &nvap->na_mtime); 2593 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2594 attrsum += NFSX_V4TIME; 2595 } else { 2596 vfs_timestamp(&nvap->na_mtime); 2597 if (!toclient) 2598 nvap->na_vaflags |= VA_UTIMES_NULL; 2599 } 2600 break; 2601 default: 2602 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2603 /* 2604 * set bitpos so we drop out of the loop. 2605 */ 2606 bitpos = NFSATTRBIT_MAX; 2607 break; 2608 } 2609 } 2610 2611 /* 2612 * some clients pad the attrlist, so we need to skip over the 2613 * padding. 2614 */ 2615 if (attrsum > attrsize) { 2616 error = NFSERR_BADXDR; 2617 } else { 2618 attrsize = NFSM_RNDUP(attrsize); 2619 if (attrsum < attrsize) 2620 error = nfsm_advance(nd, attrsize - attrsum, -1); 2621 } 2622 nfsmout: 2623 NFSEXITCODE2(error, nd); 2624 return (error); 2625 } 2626 2627 /* 2628 * Check/setup export credentials. 2629 */ 2630 int 2631 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2632 struct ucred *credanon) 2633 { 2634 int error = 0; 2635 2636 /* 2637 * Check/setup credentials. 2638 */ 2639 if (nd->nd_flag & ND_GSS) 2640 exp->nes_exflag &= ~MNT_EXPORTANON; 2641 2642 /* 2643 * Check to see if the operation is allowed for this security flavor. 2644 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2645 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2646 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2647 */ 2648 if (nfsvno_testexp(nd, exp) && 2649 nd->nd_procnum != NFSV4OP_SECINFO && 2650 nd->nd_procnum != NFSPROC_FSINFO) { 2651 if (nd->nd_flag & ND_NFSV4) 2652 error = NFSERR_WRONGSEC; 2653 else 2654 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2655 goto out; 2656 } 2657 2658 /* 2659 * Check to see if the file system is exported V4 only. 2660 */ 2661 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2662 error = NFSERR_PROGNOTV4; 2663 goto out; 2664 } 2665 2666 /* 2667 * Now, map the user credentials. 2668 * (Note that ND_AUTHNONE will only be set for an NFSv3 2669 * Fsinfo RPC. If set for anything else, this code might need 2670 * to change.) 2671 */ 2672 if (NFSVNO_EXPORTED(exp)) { 2673 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2674 NFSVNO_EXPORTANON(exp) || 2675 (nd->nd_flag & ND_AUTHNONE) != 0) { 2676 nd->nd_cred->cr_uid = credanon->cr_uid; 2677 nd->nd_cred->cr_gid = credanon->cr_gid; 2678 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2679 credanon->cr_groups); 2680 } else if ((nd->nd_flag & ND_GSS) == 0) { 2681 /* 2682 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2683 * if there is a replacement credential with a group 2684 * list set up by "nfsuserd -manage-gids". 2685 * If there is no replacement, nfsrv_getgrpscred() 2686 * simply returns its argument. 2687 */ 2688 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2689 } 2690 } 2691 2692 out: 2693 NFSEXITCODE2(error, nd); 2694 return (error); 2695 } 2696 2697 /* 2698 * Check exports. 2699 */ 2700 int 2701 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2702 struct ucred **credp) 2703 { 2704 int i, error, *secflavors; 2705 2706 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2707 &exp->nes_numsecflavor, &secflavors); 2708 if (error) { 2709 if (nfs_rootfhset) { 2710 exp->nes_exflag = 0; 2711 exp->nes_numsecflavor = 0; 2712 error = 0; 2713 } 2714 } else { 2715 /* Copy the security flavors. */ 2716 for (i = 0; i < exp->nes_numsecflavor; i++) 2717 exp->nes_secflavors[i] = secflavors[i]; 2718 } 2719 NFSEXITCODE(error); 2720 return (error); 2721 } 2722 2723 /* 2724 * Get a vnode for a file handle and export stuff. 2725 */ 2726 int 2727 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2728 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2729 struct ucred **credp) 2730 { 2731 int i, error, *secflavors; 2732 2733 *credp = NULL; 2734 exp->nes_numsecflavor = 0; 2735 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2736 if (error != 0) 2737 /* Make sure the server replies ESTALE to the client. */ 2738 error = ESTALE; 2739 if (nam && !error) { 2740 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2741 &exp->nes_numsecflavor, &secflavors); 2742 if (error) { 2743 if (nfs_rootfhset) { 2744 exp->nes_exflag = 0; 2745 exp->nes_numsecflavor = 0; 2746 error = 0; 2747 } else { 2748 vput(*vpp); 2749 } 2750 } else { 2751 /* Copy the security flavors. */ 2752 for (i = 0; i < exp->nes_numsecflavor; i++) 2753 exp->nes_secflavors[i] = secflavors[i]; 2754 } 2755 } 2756 NFSEXITCODE(error); 2757 return (error); 2758 } 2759 2760 /* 2761 * nfsd_fhtovp() - convert a fh to a vnode ptr 2762 * - look up fsid in mount list (if not found ret error) 2763 * - get vp and export rights by calling nfsvno_fhtovp() 2764 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2765 * for AUTH_SYS 2766 * - if mpp != NULL, return the mount point so that it can 2767 * be used for vn_finished_write() by the caller 2768 */ 2769 void 2770 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2771 struct vnode **vpp, struct nfsexstuff *exp, 2772 struct mount **mpp, int startwrite, struct thread *p) 2773 { 2774 struct mount *mp; 2775 struct ucred *credanon; 2776 fhandle_t *fhp; 2777 2778 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2779 /* 2780 * Check for the special case of the nfsv4root_fh. 2781 */ 2782 mp = vfs_busyfs(&fhp->fh_fsid); 2783 if (mpp != NULL) 2784 *mpp = mp; 2785 if (mp == NULL) { 2786 *vpp = NULL; 2787 nd->nd_repstat = ESTALE; 2788 goto out; 2789 } 2790 2791 if (startwrite) { 2792 vn_start_write(NULL, mpp, V_WAIT); 2793 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2794 lktype = LK_EXCLUSIVE; 2795 } 2796 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2797 &credanon); 2798 vfs_unbusy(mp); 2799 2800 /* 2801 * For NFSv4 without a pseudo root fs, unexported file handles 2802 * can be returned, so that Lookup works everywhere. 2803 */ 2804 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2805 !(nd->nd_flag & ND_NFSV4)) { 2806 vput(*vpp); 2807 nd->nd_repstat = EACCES; 2808 } 2809 2810 /* 2811 * Personally, I've never seen any point in requiring a 2812 * reserved port#, since only in the rare case where the 2813 * clients are all boxes with secure system privileges, 2814 * does it provide any enhanced security, but... some people 2815 * believe it to be useful and keep putting this code back in. 2816 * (There is also some "security checker" out there that 2817 * complains if the nfs server doesn't enforce this.) 2818 * However, note the following: 2819 * RFC3530 (NFSv4) specifies that a reserved port# not be 2820 * required. 2821 * RFC2623 recommends that, if a reserved port# is checked for, 2822 * that there be a way to turn that off--> ifdef'd. 2823 */ 2824 #ifdef NFS_REQRSVPORT 2825 if (!nd->nd_repstat) { 2826 struct sockaddr_in *saddr; 2827 struct sockaddr_in6 *saddr6; 2828 2829 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2830 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2831 if (!(nd->nd_flag & ND_NFSV4) && 2832 ((saddr->sin_family == AF_INET && 2833 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2834 (saddr6->sin6_family == AF_INET6 && 2835 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2836 vput(*vpp); 2837 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2838 } 2839 } 2840 #endif /* NFS_REQRSVPORT */ 2841 2842 /* 2843 * Check/setup credentials. 2844 */ 2845 if (!nd->nd_repstat) { 2846 nd->nd_saveduid = nd->nd_cred->cr_uid; 2847 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2848 if (nd->nd_repstat) 2849 vput(*vpp); 2850 } 2851 if (credanon != NULL) 2852 crfree(credanon); 2853 if (nd->nd_repstat) { 2854 if (startwrite) 2855 vn_finished_write(mp); 2856 *vpp = NULL; 2857 if (mpp != NULL) 2858 *mpp = NULL; 2859 } 2860 2861 out: 2862 NFSEXITCODE2(0, nd); 2863 } 2864 2865 /* 2866 * glue for fp. 2867 */ 2868 static int 2869 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2870 { 2871 struct filedesc *fdp; 2872 struct file *fp; 2873 int error = 0; 2874 2875 fdp = p->td_proc->p_fd; 2876 if (fd < 0 || fd >= fdp->fd_nfiles || 2877 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2878 error = EBADF; 2879 goto out; 2880 } 2881 *fpp = fp; 2882 2883 out: 2884 NFSEXITCODE(error); 2885 return (error); 2886 } 2887 2888 /* 2889 * Called from nfssvc() to update the exports list. Just call 2890 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2891 * in the mount list. 2892 */ 2893 int 2894 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2895 { 2896 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2897 int error = 0; 2898 struct nameidata nd; 2899 fhandle_t fh; 2900 2901 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2902 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2903 nfs_rootfhset = 0; 2904 else if (error == 0) { 2905 if (nfsexargp->fspec == NULL) { 2906 error = EPERM; 2907 goto out; 2908 } 2909 /* 2910 * If fspec != NULL, this is the v4root path. 2911 */ 2912 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2913 nfsexargp->fspec, p); 2914 if ((error = namei(&nd)) != 0) 2915 goto out; 2916 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2917 vrele(nd.ni_vp); 2918 if (!error) { 2919 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2920 NFSBCOPY((caddr_t)&fh, 2921 nfs_rootfh.nfsrvfh_data, 2922 sizeof (fhandle_t)); 2923 nfs_rootfhset = 1; 2924 } 2925 } 2926 2927 out: 2928 NFSEXITCODE(error); 2929 return (error); 2930 } 2931 2932 /* 2933 * This function needs to test to see if the system is near its limit 2934 * for memory allocation via malloc() or mget() and return True iff 2935 * either of these resources are near their limit. 2936 * XXX (For now, this is just a stub.) 2937 */ 2938 int nfsrv_testmalloclimit = 0; 2939 int 2940 nfsrv_mallocmget_limit(void) 2941 { 2942 static int printmesg = 0; 2943 static int testval = 1; 2944 2945 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2946 if ((printmesg++ % 100) == 0) 2947 printf("nfsd: malloc/mget near limit\n"); 2948 return (1); 2949 } 2950 return (0); 2951 } 2952 2953 /* 2954 * BSD specific initialization of a mount point. 2955 */ 2956 void 2957 nfsd_mntinit(void) 2958 { 2959 static int inited = 0; 2960 2961 if (inited) 2962 return; 2963 inited = 1; 2964 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2965 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2966 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2967 nfsv4root_mnt.mnt_export = NULL; 2968 TAILQ_INIT(&nfsv4root_opt); 2969 TAILQ_INIT(&nfsv4root_newopt); 2970 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2971 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2972 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2973 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2974 } 2975 2976 /* 2977 * Get a vnode for a file handle, without checking exports, etc. 2978 */ 2979 struct vnode * 2980 nfsvno_getvp(fhandle_t *fhp) 2981 { 2982 struct mount *mp; 2983 struct vnode *vp; 2984 int error; 2985 2986 mp = vfs_busyfs(&fhp->fh_fsid); 2987 if (mp == NULL) 2988 return (NULL); 2989 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2990 vfs_unbusy(mp); 2991 if (error) 2992 return (NULL); 2993 return (vp); 2994 } 2995 2996 /* 2997 * Do a local VOP_ADVLOCK(). 2998 */ 2999 int 3000 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3001 u_int64_t end, struct thread *td) 3002 { 3003 int error = 0; 3004 struct flock fl; 3005 u_int64_t tlen; 3006 3007 if (nfsrv_dolocallocks == 0) 3008 goto out; 3009 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3010 3011 fl.l_whence = SEEK_SET; 3012 fl.l_type = ftype; 3013 fl.l_start = (off_t)first; 3014 if (end == NFS64BITSSET) { 3015 fl.l_len = 0; 3016 } else { 3017 tlen = end - first; 3018 fl.l_len = (off_t)tlen; 3019 } 3020 /* 3021 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3022 * values for all calls, so that all locks will be held by the 3023 * nfsd server. (The nfsd server handles conflicts between the 3024 * various clients.) 3025 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3026 * bytes, so it can't be put in l_sysid. 3027 */ 3028 if (nfsv4_sysid == 0) 3029 nfsv4_sysid = nlm_acquire_next_sysid(); 3030 fl.l_pid = (pid_t)0; 3031 fl.l_sysid = (int)nfsv4_sysid; 3032 3033 if (ftype == F_UNLCK) 3034 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3035 (F_POSIX | F_REMOTE)); 3036 else 3037 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3038 (F_POSIX | F_REMOTE)); 3039 3040 out: 3041 NFSEXITCODE(error); 3042 return (error); 3043 } 3044 3045 /* 3046 * Check the nfsv4 root exports. 3047 */ 3048 int 3049 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3050 { 3051 struct ucred *credanon; 3052 int exflags, error = 0, numsecflavor, *secflavors, i; 3053 3054 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3055 &credanon, &numsecflavor, &secflavors); 3056 if (error) { 3057 error = NFSERR_PROGUNAVAIL; 3058 goto out; 3059 } 3060 if (credanon != NULL) 3061 crfree(credanon); 3062 for (i = 0; i < numsecflavor; i++) { 3063 if (secflavors[i] == AUTH_SYS) 3064 nd->nd_flag |= ND_EXAUTHSYS; 3065 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3066 nd->nd_flag |= ND_EXGSS; 3067 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3068 nd->nd_flag |= ND_EXGSSINTEGRITY; 3069 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3070 nd->nd_flag |= ND_EXGSSPRIVACY; 3071 } 3072 3073 out: 3074 NFSEXITCODE(error); 3075 return (error); 3076 } 3077 3078 /* 3079 * Nfs server pseudo system call for the nfsd's 3080 */ 3081 /* 3082 * MPSAFE 3083 */ 3084 static int 3085 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3086 { 3087 struct file *fp; 3088 struct nfsd_addsock_args sockarg; 3089 struct nfsd_nfsd_args nfsdarg; 3090 cap_rights_t rights; 3091 int error; 3092 3093 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3094 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3095 if (error) 3096 goto out; 3097 /* 3098 * Since we don't know what rights might be required, 3099 * pretend that we need them all. It is better to be too 3100 * careful than too reckless. 3101 */ 3102 error = fget(td, sockarg.sock, 3103 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3104 if (error != 0) 3105 goto out; 3106 if (fp->f_type != DTYPE_SOCKET) { 3107 fdrop(fp, td); 3108 error = EPERM; 3109 goto out; 3110 } 3111 error = nfsrvd_addsock(fp); 3112 fdrop(fp, td); 3113 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3114 if (uap->argp == NULL) { 3115 error = EINVAL; 3116 goto out; 3117 } 3118 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3119 sizeof (nfsdarg)); 3120 if (error) 3121 goto out; 3122 error = nfsrvd_nfsd(td, &nfsdarg); 3123 } else { 3124 error = nfssvc_srvcall(td, uap, td->td_ucred); 3125 } 3126 3127 out: 3128 NFSEXITCODE(error); 3129 return (error); 3130 } 3131 3132 static int 3133 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3134 { 3135 struct nfsex_args export; 3136 struct file *fp = NULL; 3137 int stablefd, len; 3138 struct nfsd_clid adminrevoke; 3139 struct nfsd_dumplist dumplist; 3140 struct nfsd_dumpclients *dumpclients; 3141 struct nfsd_dumplocklist dumplocklist; 3142 struct nfsd_dumplocks *dumplocks; 3143 struct nameidata nd; 3144 vnode_t vp; 3145 int error = EINVAL, igotlock; 3146 struct proc *procp; 3147 static int suspend_nfsd = 0; 3148 3149 if (uap->flag & NFSSVC_PUBLICFH) { 3150 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3151 sizeof (fhandle_t)); 3152 error = copyin(uap->argp, 3153 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3154 if (!error) 3155 nfs_pubfhset = 1; 3156 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3157 error = copyin(uap->argp,(caddr_t)&export, 3158 sizeof (struct nfsex_args)); 3159 if (!error) 3160 error = nfsrv_v4rootexport(&export, cred, p); 3161 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3162 nfs_pubfhset = 0; 3163 error = 0; 3164 } else if (uap->flag & NFSSVC_STABLERESTART) { 3165 error = copyin(uap->argp, (caddr_t)&stablefd, 3166 sizeof (int)); 3167 if (!error) 3168 error = fp_getfvp(p, stablefd, &fp, &vp); 3169 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3170 error = EBADF; 3171 if (!error && newnfs_numnfsd != 0) 3172 error = EPERM; 3173 if (!error) { 3174 nfsrv_stablefirst.nsf_fp = fp; 3175 nfsrv_setupstable(p); 3176 } 3177 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3178 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3179 sizeof (struct nfsd_clid)); 3180 if (!error) 3181 error = nfsrv_adminrevoke(&adminrevoke, p); 3182 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3183 error = copyin(uap->argp, (caddr_t)&dumplist, 3184 sizeof (struct nfsd_dumplist)); 3185 if (!error && (dumplist.ndl_size < 1 || 3186 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3187 error = EPERM; 3188 if (!error) { 3189 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3190 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3191 M_TEMP, M_WAITOK); 3192 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3193 error = copyout(dumpclients, 3194 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3195 free((caddr_t)dumpclients, M_TEMP); 3196 } 3197 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3198 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3199 sizeof (struct nfsd_dumplocklist)); 3200 if (!error && (dumplocklist.ndllck_size < 1 || 3201 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3202 error = EPERM; 3203 if (!error) 3204 error = nfsrv_lookupfilename(&nd, 3205 dumplocklist.ndllck_fname, p); 3206 if (!error) { 3207 len = sizeof (struct nfsd_dumplocks) * 3208 dumplocklist.ndllck_size; 3209 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3210 M_TEMP, M_WAITOK); 3211 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3212 dumplocklist.ndllck_size, p); 3213 vput(nd.ni_vp); 3214 error = copyout(dumplocks, 3215 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3216 free((caddr_t)dumplocks, M_TEMP); 3217 } 3218 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3219 procp = p->td_proc; 3220 PROC_LOCK(procp); 3221 nfsd_master_pid = procp->p_pid; 3222 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3223 nfsd_master_start = procp->p_stats->p_start; 3224 nfsd_master_proc = procp; 3225 PROC_UNLOCK(procp); 3226 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3227 NFSLOCKV4ROOTMUTEX(); 3228 if (suspend_nfsd == 0) { 3229 /* Lock out all nfsd threads */ 3230 do { 3231 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3232 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3233 } while (igotlock == 0 && suspend_nfsd == 0); 3234 suspend_nfsd = 1; 3235 } 3236 NFSUNLOCKV4ROOTMUTEX(); 3237 error = 0; 3238 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3239 NFSLOCKV4ROOTMUTEX(); 3240 if (suspend_nfsd != 0) { 3241 nfsv4_unlock(&nfsd_suspend_lock, 0); 3242 suspend_nfsd = 0; 3243 } 3244 NFSUNLOCKV4ROOTMUTEX(); 3245 error = 0; 3246 } 3247 3248 NFSEXITCODE(error); 3249 return (error); 3250 } 3251 3252 /* 3253 * Check exports. 3254 * Returns 0 if ok, 1 otherwise. 3255 */ 3256 int 3257 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3258 { 3259 int i; 3260 3261 /* 3262 * This seems odd, but allow the case where the security flavor 3263 * list is empty. This happens when NFSv4 is traversing non-exported 3264 * file systems. Exported file systems should always have a non-empty 3265 * security flavor list. 3266 */ 3267 if (exp->nes_numsecflavor == 0) 3268 return (0); 3269 3270 for (i = 0; i < exp->nes_numsecflavor; i++) { 3271 /* 3272 * The tests for privacy and integrity must be first, 3273 * since ND_GSS is set for everything but AUTH_SYS. 3274 */ 3275 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3276 (nd->nd_flag & ND_GSSPRIVACY)) 3277 return (0); 3278 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3279 (nd->nd_flag & ND_GSSINTEGRITY)) 3280 return (0); 3281 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3282 (nd->nd_flag & ND_GSS)) 3283 return (0); 3284 if (exp->nes_secflavors[i] == AUTH_SYS && 3285 (nd->nd_flag & ND_GSS) == 0) 3286 return (0); 3287 } 3288 return (1); 3289 } 3290 3291 /* 3292 * Calculate a hash value for the fid in a file handle. 3293 */ 3294 uint32_t 3295 nfsrv_hashfh(fhandle_t *fhp) 3296 { 3297 uint32_t hashval; 3298 3299 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3300 return (hashval); 3301 } 3302 3303 /* 3304 * Calculate a hash value for the sessionid. 3305 */ 3306 uint32_t 3307 nfsrv_hashsessionid(uint8_t *sessionid) 3308 { 3309 uint32_t hashval; 3310 3311 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3312 return (hashval); 3313 } 3314 3315 /* 3316 * Signal the userland master nfsd to backup the stable restart file. 3317 */ 3318 void 3319 nfsrv_backupstable(void) 3320 { 3321 struct proc *procp; 3322 3323 if (nfsd_master_proc != NULL) { 3324 procp = pfind(nfsd_master_pid); 3325 /* Try to make sure it is the correct process. */ 3326 if (procp == nfsd_master_proc && 3327 procp->p_stats->p_start.tv_sec == 3328 nfsd_master_start.tv_sec && 3329 procp->p_stats->p_start.tv_usec == 3330 nfsd_master_start.tv_usec && 3331 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3332 kern_psignal(procp, SIGUSR2); 3333 else 3334 nfsd_master_proc = NULL; 3335 3336 if (procp != NULL) 3337 PROC_UNLOCK(procp); 3338 } 3339 } 3340 3341 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3342 3343 /* 3344 * Called once to initialize data structures... 3345 */ 3346 static int 3347 nfsd_modevent(module_t mod, int type, void *data) 3348 { 3349 int error = 0, i; 3350 static int loaded = 0; 3351 3352 switch (type) { 3353 case MOD_LOAD: 3354 if (loaded) 3355 goto out; 3356 newnfs_portinit(); 3357 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3358 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 3359 MTX_DEF); 3360 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 3361 MTX_DEF); 3362 } 3363 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 3364 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 3365 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 3366 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3367 nfsrvd_initcache(); 3368 nfsd_init(); 3369 NFSD_LOCK(); 3370 nfsrvd_init(0); 3371 NFSD_UNLOCK(); 3372 nfsd_mntinit(); 3373 #ifdef VV_DISABLEDELEG 3374 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3375 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3376 #endif 3377 nfsd_call_servertimer = nfsrv_servertimer; 3378 nfsd_call_nfsd = nfssvc_nfsd; 3379 loaded = 1; 3380 break; 3381 3382 case MOD_UNLOAD: 3383 if (newnfs_numnfsd != 0) { 3384 error = EBUSY; 3385 break; 3386 } 3387 3388 #ifdef VV_DISABLEDELEG 3389 vn_deleg_ops.vndeleg_recall = NULL; 3390 vn_deleg_ops.vndeleg_disable = NULL; 3391 #endif 3392 nfsd_call_servertimer = NULL; 3393 nfsd_call_nfsd = NULL; 3394 3395 /* Clean out all NFSv4 state. */ 3396 nfsrv_throwawayallstate(curthread); 3397 3398 /* Clean the NFS server reply cache */ 3399 nfsrvd_cleancache(); 3400 3401 /* Free up the krpc server pool. */ 3402 if (nfsrvd_pool != NULL) 3403 svcpool_destroy(nfsrvd_pool); 3404 3405 /* and get rid of the locks */ 3406 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3407 mtx_destroy(&nfsrchash_table[i].mtx); 3408 mtx_destroy(&nfsrcahash_table[i].mtx); 3409 } 3410 mtx_destroy(&nfsrc_udpmtx); 3411 mtx_destroy(&nfs_v4root_mutex); 3412 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3413 for (i = 0; i < nfsrv_sessionhashsize; i++) 3414 mtx_destroy(&nfssessionhash[i].mtx); 3415 lockdestroy(&nfsv4root_mnt.mnt_explock); 3416 free(nfsclienthash, M_NFSDCLIENT); 3417 free(nfslockhash, M_NFSDLOCKFILE); 3418 free(nfssessionhash, M_NFSDSESSION); 3419 loaded = 0; 3420 break; 3421 default: 3422 error = EOPNOTSUPP; 3423 break; 3424 } 3425 3426 out: 3427 NFSEXITCODE(error); 3428 return (error); 3429 } 3430 static moduledata_t nfsd_mod = { 3431 "nfsd", 3432 nfsd_modevent, 3433 NULL, 3434 }; 3435 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3436 3437 /* So that loader and kldload(2) can find us, wherever we are.. */ 3438 MODULE_VERSION(nfsd, 1); 3439 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3440 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3441 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3442 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3443 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3444 3445