1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/capsicum.h> 38 39 /* 40 * Functions that perform the vfs operations required by the routines in 41 * nfsd_serv.c. It is hoped that this change will make the server more 42 * portable. 43 */ 44 45 #include <fs/nfs/nfsport.h> 46 #include <sys/hash.h> 47 #include <sys/sysctl.h> 48 #include <nlm/nlm_prot.h> 49 #include <nlm/nlm.h> 50 51 FEATURE(nfsd, "NFSv4 server"); 52 53 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 54 extern int nfsrv_useacl; 55 extern int newnfs_numnfsd; 56 extern struct mount nfsv4root_mnt; 57 extern struct nfsrv_stablefirst nfsrv_stablefirst; 58 extern void (*nfsd_call_servertimer)(void); 59 extern SVCPOOL *nfsrvd_pool; 60 extern struct nfsv4lock nfsd_suspend_lock; 61 extern struct nfsclienthashhead *nfsclienthash; 62 extern struct nfslockhashhead *nfslockhash; 63 extern struct nfssessionhash *nfssessionhash; 64 extern int nfsrv_sessionhashsize; 65 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 66 NFSDLOCKMUTEX; 67 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 68 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 69 struct mtx nfsrc_udpmtx; 70 struct mtx nfs_v4root_mutex; 71 struct nfsrvfh nfs_rootfh, nfs_pubfh; 72 int nfs_pubfhset = 0, nfs_rootfhset = 0; 73 struct proc *nfsd_master_proc = NULL; 74 int nfsd_debuglevel = 0; 75 static pid_t nfsd_master_pid = (pid_t)-1; 76 static char nfsd_master_comm[MAXCOMLEN + 1]; 77 static struct timeval nfsd_master_start; 78 static uint32_t nfsv4_sysid = 0; 79 80 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 81 struct ucred *); 82 83 int nfsrv_enable_crossmntpt = 1; 84 static int nfs_commit_blks; 85 static int nfs_commit_miss; 86 extern int nfsrv_issuedelegs; 87 extern int nfsrv_dolocallocks; 88 extern int nfsd_enable_stringtouid; 89 90 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "NFS server"); 91 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 92 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 93 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 94 0, ""); 95 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 96 0, ""); 97 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 98 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 99 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 100 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 101 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 102 0, "Debug level for NFS server"); 103 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 104 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 105 106 #define MAX_REORDERED_RPC 16 107 #define NUM_HEURISTIC 1031 108 #define NHUSE_INIT 64 109 #define NHUSE_INC 16 110 #define NHUSE_MAX 2048 111 112 static struct nfsheur { 113 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 114 off_t nh_nextoff; /* next offset for sequential detection */ 115 int nh_use; /* use count for selection */ 116 int nh_seqcount; /* heuristic */ 117 } nfsheur[NUM_HEURISTIC]; 118 119 120 /* 121 * Heuristic to detect sequential operation. 122 */ 123 static struct nfsheur * 124 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 125 { 126 struct nfsheur *nh; 127 int hi, try; 128 129 /* Locate best candidate. */ 130 try = 32; 131 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 132 nh = &nfsheur[hi]; 133 while (try--) { 134 if (nfsheur[hi].nh_vp == vp) { 135 nh = &nfsheur[hi]; 136 break; 137 } 138 if (nfsheur[hi].nh_use > 0) 139 --nfsheur[hi].nh_use; 140 hi = (hi + 1) % NUM_HEURISTIC; 141 if (nfsheur[hi].nh_use < nh->nh_use) 142 nh = &nfsheur[hi]; 143 } 144 145 /* Initialize hint if this is a new file. */ 146 if (nh->nh_vp != vp) { 147 nh->nh_vp = vp; 148 nh->nh_nextoff = uio->uio_offset; 149 nh->nh_use = NHUSE_INIT; 150 if (uio->uio_offset == 0) 151 nh->nh_seqcount = 4; 152 else 153 nh->nh_seqcount = 1; 154 } 155 156 /* Calculate heuristic. */ 157 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 158 uio->uio_offset == nh->nh_nextoff) { 159 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 160 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 161 if (nh->nh_seqcount > IO_SEQMAX) 162 nh->nh_seqcount = IO_SEQMAX; 163 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 164 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 165 /* Probably a reordered RPC, leave seqcount alone. */ 166 } else if (nh->nh_seqcount > 1) { 167 nh->nh_seqcount /= 2; 168 } else { 169 nh->nh_seqcount = 0; 170 } 171 nh->nh_use += NHUSE_INC; 172 if (nh->nh_use > NHUSE_MAX) 173 nh->nh_use = NHUSE_MAX; 174 return (nh); 175 } 176 177 /* 178 * Get attributes into nfsvattr structure. 179 */ 180 int 181 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 182 struct thread *p, int vpislocked) 183 { 184 int error, lockedit = 0; 185 186 if (vpislocked == 0) { 187 /* 188 * When vpislocked == 0, the vnode is either exclusively 189 * locked by this thread or not locked by this thread. 190 * As such, shared lock it, if not exclusively locked. 191 */ 192 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 193 lockedit = 1; 194 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 195 } 196 } 197 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 198 if (lockedit != 0) 199 NFSVOPUNLOCK(vp, 0); 200 201 NFSEXITCODE(error); 202 return (error); 203 } 204 205 /* 206 * Get a file handle for a vnode. 207 */ 208 int 209 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 210 { 211 int error; 212 213 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 214 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 215 error = VOP_VPTOFH(vp, &fhp->fh_fid); 216 217 NFSEXITCODE(error); 218 return (error); 219 } 220 221 /* 222 * Perform access checking for vnodes obtained from file handles that would 223 * refer to files already opened by a Unix client. You cannot just use 224 * vn_writechk() and VOP_ACCESSX() for two reasons. 225 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 226 * case. 227 * 2 - The owner is to be given access irrespective of mode bits for some 228 * operations, so that processes that chmod after opening a file don't 229 * break. 230 */ 231 int 232 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 233 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 234 u_int32_t *supportedtypep) 235 { 236 struct vattr vattr; 237 int error = 0, getret = 0; 238 239 if (vpislocked == 0) { 240 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 241 error = EPERM; 242 goto out; 243 } 244 } 245 if (accmode & VWRITE) { 246 /* Just vn_writechk() changed to check rdonly */ 247 /* 248 * Disallow write attempts on read-only file systems; 249 * unless the file is a socket or a block or character 250 * device resident on the file system. 251 */ 252 if (NFSVNO_EXRDONLY(exp) || 253 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 254 switch (vp->v_type) { 255 case VREG: 256 case VDIR: 257 case VLNK: 258 error = EROFS; 259 default: 260 break; 261 } 262 } 263 /* 264 * If there's shared text associated with 265 * the inode, try to free it up once. If 266 * we fail, we can't allow writing. 267 */ 268 if (VOP_IS_TEXT(vp) && error == 0) 269 error = ETXTBSY; 270 } 271 if (error != 0) { 272 if (vpislocked == 0) 273 NFSVOPUNLOCK(vp, 0); 274 goto out; 275 } 276 277 /* 278 * Should the override still be applied when ACLs are enabled? 279 */ 280 error = VOP_ACCESSX(vp, accmode, cred, p); 281 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 282 /* 283 * Try again with VEXPLICIT_DENY, to see if the test for 284 * deletion is supported. 285 */ 286 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 287 if (error == 0) { 288 if (vp->v_type == VDIR) { 289 accmode &= ~(VDELETE | VDELETE_CHILD); 290 accmode |= VWRITE; 291 error = VOP_ACCESSX(vp, accmode, cred, p); 292 } else if (supportedtypep != NULL) { 293 *supportedtypep &= ~NFSACCESS_DELETE; 294 } 295 } 296 } 297 298 /* 299 * Allow certain operations for the owner (reads and writes 300 * on files that are already open). 301 */ 302 if (override != NFSACCCHK_NOOVERRIDE && 303 (error == EPERM || error == EACCES)) { 304 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 305 error = 0; 306 else if (override & NFSACCCHK_ALLOWOWNER) { 307 getret = VOP_GETATTR(vp, &vattr, cred); 308 if (getret == 0 && cred->cr_uid == vattr.va_uid) 309 error = 0; 310 } 311 } 312 if (vpislocked == 0) 313 NFSVOPUNLOCK(vp, 0); 314 315 out: 316 NFSEXITCODE(error); 317 return (error); 318 } 319 320 /* 321 * Set attribute(s) vnop. 322 */ 323 int 324 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 325 struct thread *p, struct nfsexstuff *exp) 326 { 327 int error; 328 329 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 330 NFSEXITCODE(error); 331 return (error); 332 } 333 334 /* 335 * Set up nameidata for a lookup() call and do it. 336 */ 337 int 338 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 339 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 340 struct vnode **retdirp) 341 { 342 struct componentname *cnp = &ndp->ni_cnd; 343 int i; 344 struct iovec aiov; 345 struct uio auio; 346 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 347 int error = 0, crossmnt; 348 char *cp; 349 350 *retdirp = NULL; 351 cnp->cn_nameptr = cnp->cn_pnbuf; 352 ndp->ni_strictrelative = 0; 353 /* 354 * Extract and set starting directory. 355 */ 356 if (dp->v_type != VDIR) { 357 if (islocked) 358 vput(dp); 359 else 360 vrele(dp); 361 nfsvno_relpathbuf(ndp); 362 error = ENOTDIR; 363 goto out1; 364 } 365 if (islocked) 366 NFSVOPUNLOCK(dp, 0); 367 VREF(dp); 368 *retdirp = dp; 369 if (NFSVNO_EXRDONLY(exp)) 370 cnp->cn_flags |= RDONLY; 371 ndp->ni_segflg = UIO_SYSSPACE; 372 crossmnt = 1; 373 374 if (nd->nd_flag & ND_PUBLOOKUP) { 375 ndp->ni_loopcnt = 0; 376 if (cnp->cn_pnbuf[0] == '/') { 377 vrele(dp); 378 /* 379 * Check for degenerate pathnames here, since lookup() 380 * panics on them. 381 */ 382 for (i = 1; i < ndp->ni_pathlen; i++) 383 if (cnp->cn_pnbuf[i] != '/') 384 break; 385 if (i == ndp->ni_pathlen) { 386 error = NFSERR_ACCES; 387 goto out; 388 } 389 dp = rootvnode; 390 VREF(dp); 391 } 392 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 393 (nd->nd_flag & ND_NFSV4) == 0) { 394 /* 395 * Only cross mount points for NFSv4 when doing a 396 * mount while traversing the file system above 397 * the mount point, unless nfsrv_enable_crossmntpt is set. 398 */ 399 cnp->cn_flags |= NOCROSSMOUNT; 400 crossmnt = 0; 401 } 402 403 /* 404 * Initialize for scan, set ni_startdir and bump ref on dp again 405 * because lookup() will dereference ni_startdir. 406 */ 407 408 cnp->cn_thread = p; 409 ndp->ni_startdir = dp; 410 ndp->ni_rootdir = rootvnode; 411 ndp->ni_topdir = NULL; 412 413 if (!lockleaf) 414 cnp->cn_flags |= LOCKLEAF; 415 for (;;) { 416 cnp->cn_nameptr = cnp->cn_pnbuf; 417 /* 418 * Call lookup() to do the real work. If an error occurs, 419 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 420 * we do not have to dereference anything before returning. 421 * In either case ni_startdir will be dereferenced and NULLed 422 * out. 423 */ 424 error = lookup(ndp); 425 if (error) 426 break; 427 428 /* 429 * Check for encountering a symbolic link. Trivial 430 * termination occurs if no symlink encountered. 431 */ 432 if ((cnp->cn_flags & ISSYMLINK) == 0) { 433 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 434 nfsvno_relpathbuf(ndp); 435 if (ndp->ni_vp && !lockleaf) 436 NFSVOPUNLOCK(ndp->ni_vp, 0); 437 break; 438 } 439 440 /* 441 * Validate symlink 442 */ 443 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 444 NFSVOPUNLOCK(ndp->ni_dvp, 0); 445 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 446 error = EINVAL; 447 goto badlink2; 448 } 449 450 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 451 error = ELOOP; 452 goto badlink2; 453 } 454 if (ndp->ni_pathlen > 1) 455 cp = uma_zalloc(namei_zone, M_WAITOK); 456 else 457 cp = cnp->cn_pnbuf; 458 aiov.iov_base = cp; 459 aiov.iov_len = MAXPATHLEN; 460 auio.uio_iov = &aiov; 461 auio.uio_iovcnt = 1; 462 auio.uio_offset = 0; 463 auio.uio_rw = UIO_READ; 464 auio.uio_segflg = UIO_SYSSPACE; 465 auio.uio_td = NULL; 466 auio.uio_resid = MAXPATHLEN; 467 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 468 if (error) { 469 badlink1: 470 if (ndp->ni_pathlen > 1) 471 uma_zfree(namei_zone, cp); 472 badlink2: 473 vrele(ndp->ni_dvp); 474 vput(ndp->ni_vp); 475 break; 476 } 477 linklen = MAXPATHLEN - auio.uio_resid; 478 if (linklen == 0) { 479 error = ENOENT; 480 goto badlink1; 481 } 482 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 483 error = ENAMETOOLONG; 484 goto badlink1; 485 } 486 487 /* 488 * Adjust or replace path 489 */ 490 if (ndp->ni_pathlen > 1) { 491 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 492 uma_zfree(namei_zone, cnp->cn_pnbuf); 493 cnp->cn_pnbuf = cp; 494 } else 495 cnp->cn_pnbuf[linklen] = '\0'; 496 ndp->ni_pathlen += linklen; 497 498 /* 499 * Cleanup refs for next loop and check if root directory 500 * should replace current directory. Normally ni_dvp 501 * becomes the new base directory and is cleaned up when 502 * we loop. Explicitly null pointers after invalidation 503 * to clarify operation. 504 */ 505 vput(ndp->ni_vp); 506 ndp->ni_vp = NULL; 507 508 if (cnp->cn_pnbuf[0] == '/') { 509 vrele(ndp->ni_dvp); 510 ndp->ni_dvp = ndp->ni_rootdir; 511 VREF(ndp->ni_dvp); 512 } 513 ndp->ni_startdir = ndp->ni_dvp; 514 ndp->ni_dvp = NULL; 515 } 516 if (!lockleaf) 517 cnp->cn_flags &= ~LOCKLEAF; 518 519 out: 520 if (error) { 521 nfsvno_relpathbuf(ndp); 522 ndp->ni_vp = NULL; 523 ndp->ni_dvp = NULL; 524 ndp->ni_startdir = NULL; 525 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 526 ndp->ni_dvp = NULL; 527 } 528 529 out1: 530 NFSEXITCODE2(error, nd); 531 return (error); 532 } 533 534 /* 535 * Set up a pathname buffer and return a pointer to it and, optionally 536 * set a hash pointer. 537 */ 538 void 539 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 540 { 541 struct componentname *cnp = &ndp->ni_cnd; 542 543 cnp->cn_flags |= (NOMACCHECK | HASBUF); 544 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 545 if (hashpp != NULL) 546 *hashpp = NULL; 547 *bufpp = cnp->cn_pnbuf; 548 } 549 550 /* 551 * Release the above path buffer, if not released by nfsvno_namei(). 552 */ 553 void 554 nfsvno_relpathbuf(struct nameidata *ndp) 555 { 556 557 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 558 panic("nfsrelpath"); 559 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 560 ndp->ni_cnd.cn_flags &= ~HASBUF; 561 } 562 563 /* 564 * Readlink vnode op into an mbuf list. 565 */ 566 int 567 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 568 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 569 { 570 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 571 struct iovec *ivp = iv; 572 struct uio io, *uiop = &io; 573 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 574 int i, len, tlen, error = 0; 575 576 len = 0; 577 i = 0; 578 while (len < NFS_MAXPATHLEN) { 579 NFSMGET(mp); 580 MCLGET(mp, M_WAITOK); 581 mp->m_len = M_SIZE(mp); 582 if (len == 0) { 583 mp3 = mp2 = mp; 584 } else { 585 mp2->m_next = mp; 586 mp2 = mp; 587 } 588 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 589 mp->m_len = NFS_MAXPATHLEN - len; 590 len = NFS_MAXPATHLEN; 591 } else { 592 len += mp->m_len; 593 } 594 ivp->iov_base = mtod(mp, caddr_t); 595 ivp->iov_len = mp->m_len; 596 i++; 597 ivp++; 598 } 599 uiop->uio_iov = iv; 600 uiop->uio_iovcnt = i; 601 uiop->uio_offset = 0; 602 uiop->uio_resid = len; 603 uiop->uio_rw = UIO_READ; 604 uiop->uio_segflg = UIO_SYSSPACE; 605 uiop->uio_td = NULL; 606 error = VOP_READLINK(vp, uiop, cred); 607 if (error) { 608 m_freem(mp3); 609 *lenp = 0; 610 goto out; 611 } 612 if (uiop->uio_resid > 0) { 613 len -= uiop->uio_resid; 614 tlen = NFSM_RNDUP(len); 615 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 616 } 617 *lenp = len; 618 *mpp = mp3; 619 *mpendp = mp; 620 621 out: 622 NFSEXITCODE(error); 623 return (error); 624 } 625 626 /* 627 * Read vnode op call into mbuf list. 628 */ 629 int 630 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 631 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 632 { 633 struct mbuf *m; 634 int i; 635 struct iovec *iv; 636 struct iovec *iv2; 637 int error = 0, len, left, siz, tlen, ioflag = 0; 638 struct mbuf *m2 = NULL, *m3; 639 struct uio io, *uiop = &io; 640 struct nfsheur *nh; 641 642 len = left = NFSM_RNDUP(cnt); 643 m3 = NULL; 644 /* 645 * Generate the mbuf list with the uio_iov ref. to it. 646 */ 647 i = 0; 648 while (left > 0) { 649 NFSMGET(m); 650 MCLGET(m, M_WAITOK); 651 m->m_len = 0; 652 siz = min(M_TRAILINGSPACE(m), left); 653 left -= siz; 654 i++; 655 if (m3) 656 m2->m_next = m; 657 else 658 m3 = m; 659 m2 = m; 660 } 661 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 662 M_TEMP, M_WAITOK); 663 uiop->uio_iov = iv2 = iv; 664 m = m3; 665 left = len; 666 i = 0; 667 while (left > 0) { 668 if (m == NULL) 669 panic("nfsvno_read iov"); 670 siz = min(M_TRAILINGSPACE(m), left); 671 if (siz > 0) { 672 iv->iov_base = mtod(m, caddr_t) + m->m_len; 673 iv->iov_len = siz; 674 m->m_len += siz; 675 left -= siz; 676 iv++; 677 i++; 678 } 679 m = m->m_next; 680 } 681 uiop->uio_iovcnt = i; 682 uiop->uio_offset = off; 683 uiop->uio_resid = len; 684 uiop->uio_rw = UIO_READ; 685 uiop->uio_segflg = UIO_SYSSPACE; 686 uiop->uio_td = NULL; 687 nh = nfsrv_sequential_heuristic(uiop, vp); 688 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 689 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 690 FREE((caddr_t)iv2, M_TEMP); 691 if (error) { 692 m_freem(m3); 693 *mpp = NULL; 694 goto out; 695 } 696 nh->nh_nextoff = uiop->uio_offset; 697 tlen = len - uiop->uio_resid; 698 cnt = cnt < tlen ? cnt : tlen; 699 tlen = NFSM_RNDUP(cnt); 700 if (tlen == 0) { 701 m_freem(m3); 702 m3 = NULL; 703 } else if (len != tlen || tlen != cnt) 704 nfsrv_adj(m3, len - tlen, tlen - cnt); 705 *mpp = m3; 706 *mpendp = m2; 707 708 out: 709 NFSEXITCODE(error); 710 return (error); 711 } 712 713 /* 714 * Write vnode op from an mbuf list. 715 */ 716 int 717 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 718 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 719 { 720 struct iovec *ivp; 721 int i, len; 722 struct iovec *iv; 723 int ioflags, error; 724 struct uio io, *uiop = &io; 725 struct nfsheur *nh; 726 727 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 728 M_WAITOK); 729 uiop->uio_iov = iv = ivp; 730 uiop->uio_iovcnt = cnt; 731 i = mtod(mp, caddr_t) + mp->m_len - cp; 732 len = retlen; 733 while (len > 0) { 734 if (mp == NULL) 735 panic("nfsvno_write"); 736 if (i > 0) { 737 i = min(i, len); 738 ivp->iov_base = cp; 739 ivp->iov_len = i; 740 ivp++; 741 len -= i; 742 } 743 mp = mp->m_next; 744 if (mp) { 745 i = mp->m_len; 746 cp = mtod(mp, caddr_t); 747 } 748 } 749 750 if (stable == NFSWRITE_UNSTABLE) 751 ioflags = IO_NODELOCKED; 752 else 753 ioflags = (IO_SYNC | IO_NODELOCKED); 754 uiop->uio_resid = retlen; 755 uiop->uio_rw = UIO_WRITE; 756 uiop->uio_segflg = UIO_SYSSPACE; 757 NFSUIOPROC(uiop, p); 758 uiop->uio_offset = off; 759 nh = nfsrv_sequential_heuristic(uiop, vp); 760 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 761 error = VOP_WRITE(vp, uiop, ioflags, cred); 762 if (error == 0) 763 nh->nh_nextoff = uiop->uio_offset; 764 FREE((caddr_t)iv, M_TEMP); 765 766 NFSEXITCODE(error); 767 return (error); 768 } 769 770 /* 771 * Common code for creating a regular file (plus special files for V2). 772 */ 773 int 774 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 775 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 776 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 777 { 778 u_quad_t tempsize; 779 int error; 780 781 error = nd->nd_repstat; 782 if (!error && ndp->ni_vp == NULL) { 783 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 784 vrele(ndp->ni_startdir); 785 error = VOP_CREATE(ndp->ni_dvp, 786 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 787 vput(ndp->ni_dvp); 788 nfsvno_relpathbuf(ndp); 789 if (!error) { 790 if (*exclusive_flagp) { 791 *exclusive_flagp = 0; 792 NFSVNO_ATTRINIT(nvap); 793 nvap->na_atime.tv_sec = cverf[0]; 794 nvap->na_atime.tv_nsec = cverf[1]; 795 error = VOP_SETATTR(ndp->ni_vp, 796 &nvap->na_vattr, nd->nd_cred); 797 if (error != 0) { 798 vput(ndp->ni_vp); 799 ndp->ni_vp = NULL; 800 error = NFSERR_NOTSUPP; 801 } 802 } 803 } 804 /* 805 * NFS V2 Only. nfsrvd_mknod() does this for V3. 806 * (This implies, just get out on an error.) 807 */ 808 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 809 nvap->na_type == VFIFO) { 810 if (nvap->na_type == VCHR && rdev == 0xffffffff) 811 nvap->na_type = VFIFO; 812 if (nvap->na_type != VFIFO && 813 (error = priv_check_cred(nd->nd_cred, 814 PRIV_VFS_MKNOD_DEV, 0))) { 815 vrele(ndp->ni_startdir); 816 nfsvno_relpathbuf(ndp); 817 vput(ndp->ni_dvp); 818 goto out; 819 } 820 nvap->na_rdev = rdev; 821 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 822 &ndp->ni_cnd, &nvap->na_vattr); 823 vput(ndp->ni_dvp); 824 nfsvno_relpathbuf(ndp); 825 vrele(ndp->ni_startdir); 826 if (error) 827 goto out; 828 } else { 829 vrele(ndp->ni_startdir); 830 nfsvno_relpathbuf(ndp); 831 vput(ndp->ni_dvp); 832 error = ENXIO; 833 goto out; 834 } 835 *vpp = ndp->ni_vp; 836 } else { 837 /* 838 * Handle cases where error is already set and/or 839 * the file exists. 840 * 1 - clean up the lookup 841 * 2 - iff !error and na_size set, truncate it 842 */ 843 vrele(ndp->ni_startdir); 844 nfsvno_relpathbuf(ndp); 845 *vpp = ndp->ni_vp; 846 if (ndp->ni_dvp == *vpp) 847 vrele(ndp->ni_dvp); 848 else 849 vput(ndp->ni_dvp); 850 if (!error && nvap->na_size != VNOVAL) { 851 error = nfsvno_accchk(*vpp, VWRITE, 852 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 853 NFSACCCHK_VPISLOCKED, NULL); 854 if (!error) { 855 tempsize = nvap->na_size; 856 NFSVNO_ATTRINIT(nvap); 857 nvap->na_size = tempsize; 858 error = VOP_SETATTR(*vpp, 859 &nvap->na_vattr, nd->nd_cred); 860 } 861 } 862 if (error) 863 vput(*vpp); 864 } 865 866 out: 867 NFSEXITCODE(error); 868 return (error); 869 } 870 871 /* 872 * Do a mknod vnode op. 873 */ 874 int 875 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 876 struct thread *p) 877 { 878 int error = 0; 879 enum vtype vtyp; 880 881 vtyp = nvap->na_type; 882 /* 883 * Iff doesn't exist, create it. 884 */ 885 if (ndp->ni_vp) { 886 vrele(ndp->ni_startdir); 887 nfsvno_relpathbuf(ndp); 888 vput(ndp->ni_dvp); 889 vrele(ndp->ni_vp); 890 error = EEXIST; 891 goto out; 892 } 893 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 894 vrele(ndp->ni_startdir); 895 nfsvno_relpathbuf(ndp); 896 vput(ndp->ni_dvp); 897 error = NFSERR_BADTYPE; 898 goto out; 899 } 900 if (vtyp == VSOCK) { 901 vrele(ndp->ni_startdir); 902 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 903 &ndp->ni_cnd, &nvap->na_vattr); 904 vput(ndp->ni_dvp); 905 nfsvno_relpathbuf(ndp); 906 } else { 907 if (nvap->na_type != VFIFO && 908 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 909 vrele(ndp->ni_startdir); 910 nfsvno_relpathbuf(ndp); 911 vput(ndp->ni_dvp); 912 goto out; 913 } 914 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 915 &ndp->ni_cnd, &nvap->na_vattr); 916 vput(ndp->ni_dvp); 917 nfsvno_relpathbuf(ndp); 918 vrele(ndp->ni_startdir); 919 /* 920 * Since VOP_MKNOD returns the ni_vp, I can't 921 * see any reason to do the lookup. 922 */ 923 } 924 925 out: 926 NFSEXITCODE(error); 927 return (error); 928 } 929 930 /* 931 * Mkdir vnode op. 932 */ 933 int 934 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 935 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 936 { 937 int error = 0; 938 939 if (ndp->ni_vp != NULL) { 940 if (ndp->ni_dvp == ndp->ni_vp) 941 vrele(ndp->ni_dvp); 942 else 943 vput(ndp->ni_dvp); 944 vrele(ndp->ni_vp); 945 nfsvno_relpathbuf(ndp); 946 error = EEXIST; 947 goto out; 948 } 949 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 950 &nvap->na_vattr); 951 vput(ndp->ni_dvp); 952 nfsvno_relpathbuf(ndp); 953 954 out: 955 NFSEXITCODE(error); 956 return (error); 957 } 958 959 /* 960 * symlink vnode op. 961 */ 962 int 963 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 964 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 965 struct nfsexstuff *exp) 966 { 967 int error = 0; 968 969 if (ndp->ni_vp) { 970 vrele(ndp->ni_startdir); 971 nfsvno_relpathbuf(ndp); 972 if (ndp->ni_dvp == ndp->ni_vp) 973 vrele(ndp->ni_dvp); 974 else 975 vput(ndp->ni_dvp); 976 vrele(ndp->ni_vp); 977 error = EEXIST; 978 goto out; 979 } 980 981 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 982 &nvap->na_vattr, pathcp); 983 vput(ndp->ni_dvp); 984 vrele(ndp->ni_startdir); 985 nfsvno_relpathbuf(ndp); 986 /* 987 * Although FreeBSD still had the lookup code in 988 * it for 7/current, there doesn't seem to be any 989 * point, since VOP_SYMLINK() returns the ni_vp. 990 * Just vput it for v2. 991 */ 992 if (!not_v2 && !error) 993 vput(ndp->ni_vp); 994 995 out: 996 NFSEXITCODE(error); 997 return (error); 998 } 999 1000 /* 1001 * Parse symbolic link arguments. 1002 * This function has an ugly side effect. It will MALLOC() an area for 1003 * the symlink and set iov_base to point to it, only if it succeeds. 1004 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1005 * be FREE'd later. 1006 */ 1007 int 1008 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1009 struct thread *p, char **pathcpp, int *lenp) 1010 { 1011 u_int32_t *tl; 1012 char *pathcp = NULL; 1013 int error = 0, len; 1014 struct nfsv2_sattr *sp; 1015 1016 *pathcpp = NULL; 1017 *lenp = 0; 1018 if ((nd->nd_flag & ND_NFSV3) && 1019 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1020 goto nfsmout; 1021 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1022 len = fxdr_unsigned(int, *tl); 1023 if (len > NFS_MAXPATHLEN || len <= 0) { 1024 error = EBADRPC; 1025 goto nfsmout; 1026 } 1027 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1028 error = nfsrv_mtostr(nd, pathcp, len); 1029 if (error) 1030 goto nfsmout; 1031 if (nd->nd_flag & ND_NFSV2) { 1032 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1033 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1034 } 1035 *pathcpp = pathcp; 1036 *lenp = len; 1037 NFSEXITCODE2(0, nd); 1038 return (0); 1039 nfsmout: 1040 if (pathcp) 1041 free(pathcp, M_TEMP); 1042 NFSEXITCODE2(error, nd); 1043 return (error); 1044 } 1045 1046 /* 1047 * Remove a non-directory object. 1048 */ 1049 int 1050 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1051 struct thread *p, struct nfsexstuff *exp) 1052 { 1053 struct vnode *vp; 1054 int error = 0; 1055 1056 vp = ndp->ni_vp; 1057 if (vp->v_type == VDIR) 1058 error = NFSERR_ISDIR; 1059 else if (is_v4) 1060 error = nfsrv_checkremove(vp, 1, p); 1061 if (!error) 1062 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1063 if (ndp->ni_dvp == vp) 1064 vrele(ndp->ni_dvp); 1065 else 1066 vput(ndp->ni_dvp); 1067 vput(vp); 1068 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1069 nfsvno_relpathbuf(ndp); 1070 NFSEXITCODE(error); 1071 return (error); 1072 } 1073 1074 /* 1075 * Remove a directory. 1076 */ 1077 int 1078 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1079 struct thread *p, struct nfsexstuff *exp) 1080 { 1081 struct vnode *vp; 1082 int error = 0; 1083 1084 vp = ndp->ni_vp; 1085 if (vp->v_type != VDIR) { 1086 error = ENOTDIR; 1087 goto out; 1088 } 1089 /* 1090 * No rmdir "." please. 1091 */ 1092 if (ndp->ni_dvp == vp) { 1093 error = EINVAL; 1094 goto out; 1095 } 1096 /* 1097 * The root of a mounted filesystem cannot be deleted. 1098 */ 1099 if (vp->v_vflag & VV_ROOT) 1100 error = EBUSY; 1101 out: 1102 if (!error) 1103 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1104 if (ndp->ni_dvp == vp) 1105 vrele(ndp->ni_dvp); 1106 else 1107 vput(ndp->ni_dvp); 1108 vput(vp); 1109 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1110 nfsvno_relpathbuf(ndp); 1111 NFSEXITCODE(error); 1112 return (error); 1113 } 1114 1115 /* 1116 * Rename vnode op. 1117 */ 1118 int 1119 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1120 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1121 { 1122 struct vnode *fvp, *tvp, *tdvp; 1123 int error = 0; 1124 1125 fvp = fromndp->ni_vp; 1126 if (ndstat) { 1127 vrele(fromndp->ni_dvp); 1128 vrele(fvp); 1129 error = ndstat; 1130 goto out1; 1131 } 1132 tdvp = tondp->ni_dvp; 1133 tvp = tondp->ni_vp; 1134 if (tvp != NULL) { 1135 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1136 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1137 goto out; 1138 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1139 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1140 goto out; 1141 } 1142 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1143 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1144 goto out; 1145 } 1146 1147 /* 1148 * A rename to '.' or '..' results in a prematurely 1149 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1150 * here. 1151 */ 1152 if ((tondp->ni_cnd.cn_namelen == 1 && 1153 tondp->ni_cnd.cn_nameptr[0] == '.') || 1154 (tondp->ni_cnd.cn_namelen == 2 && 1155 tondp->ni_cnd.cn_nameptr[0] == '.' && 1156 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1157 error = EINVAL; 1158 goto out; 1159 } 1160 } 1161 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1162 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1163 goto out; 1164 } 1165 if (fvp->v_mount != tdvp->v_mount) { 1166 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1167 goto out; 1168 } 1169 if (fvp == tdvp) { 1170 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1171 goto out; 1172 } 1173 if (fvp == tvp) { 1174 /* 1175 * If source and destination are the same, there is nothing to 1176 * do. Set error to -1 to indicate this. 1177 */ 1178 error = -1; 1179 goto out; 1180 } 1181 if (ndflag & ND_NFSV4) { 1182 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1183 error = nfsrv_checkremove(fvp, 0, p); 1184 NFSVOPUNLOCK(fvp, 0); 1185 } else 1186 error = EPERM; 1187 if (tvp && !error) 1188 error = nfsrv_checkremove(tvp, 1, p); 1189 } else { 1190 /* 1191 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1192 * that the NFSv4 client won't be confused by the rename. 1193 * Since nfsd_recalldelegation() can only be called on an 1194 * unlocked vnode at this point and fvp is the file that will 1195 * still exist after the rename, just do fvp. 1196 */ 1197 nfsd_recalldelegation(fvp, p); 1198 } 1199 out: 1200 if (!error) { 1201 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1202 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1203 &tondp->ni_cnd); 1204 } else { 1205 if (tdvp == tvp) 1206 vrele(tdvp); 1207 else 1208 vput(tdvp); 1209 if (tvp) 1210 vput(tvp); 1211 vrele(fromndp->ni_dvp); 1212 vrele(fvp); 1213 if (error == -1) 1214 error = 0; 1215 } 1216 vrele(tondp->ni_startdir); 1217 nfsvno_relpathbuf(tondp); 1218 out1: 1219 vrele(fromndp->ni_startdir); 1220 nfsvno_relpathbuf(fromndp); 1221 NFSEXITCODE(error); 1222 return (error); 1223 } 1224 1225 /* 1226 * Link vnode op. 1227 */ 1228 int 1229 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1230 struct thread *p, struct nfsexstuff *exp) 1231 { 1232 struct vnode *xp; 1233 int error = 0; 1234 1235 xp = ndp->ni_vp; 1236 if (xp != NULL) { 1237 error = EEXIST; 1238 } else { 1239 xp = ndp->ni_dvp; 1240 if (vp->v_mount != xp->v_mount) 1241 error = EXDEV; 1242 } 1243 if (!error) { 1244 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1245 if ((vp->v_iflag & VI_DOOMED) == 0) 1246 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1247 else 1248 error = EPERM; 1249 if (ndp->ni_dvp == vp) 1250 vrele(ndp->ni_dvp); 1251 else 1252 vput(ndp->ni_dvp); 1253 NFSVOPUNLOCK(vp, 0); 1254 } else { 1255 if (ndp->ni_dvp == ndp->ni_vp) 1256 vrele(ndp->ni_dvp); 1257 else 1258 vput(ndp->ni_dvp); 1259 if (ndp->ni_vp) 1260 vrele(ndp->ni_vp); 1261 } 1262 nfsvno_relpathbuf(ndp); 1263 NFSEXITCODE(error); 1264 return (error); 1265 } 1266 1267 /* 1268 * Do the fsync() appropriate for the commit. 1269 */ 1270 int 1271 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1272 struct thread *td) 1273 { 1274 int error = 0; 1275 1276 /* 1277 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1278 * file is done. At this time VOP_FSYNC does not accept offset and 1279 * byte count parameters so call VOP_FSYNC the whole file for now. 1280 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1281 * File systems that do not use the buffer cache (as indicated 1282 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1283 */ 1284 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1285 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1286 /* 1287 * Give up and do the whole thing 1288 */ 1289 if (vp->v_object && 1290 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1291 VM_OBJECT_WLOCK(vp->v_object); 1292 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1293 VM_OBJECT_WUNLOCK(vp->v_object); 1294 } 1295 error = VOP_FSYNC(vp, MNT_WAIT, td); 1296 } else { 1297 /* 1298 * Locate and synchronously write any buffers that fall 1299 * into the requested range. Note: we are assuming that 1300 * f_iosize is a power of 2. 1301 */ 1302 int iosize = vp->v_mount->mnt_stat.f_iosize; 1303 int iomask = iosize - 1; 1304 struct bufobj *bo; 1305 daddr_t lblkno; 1306 1307 /* 1308 * Align to iosize boundary, super-align to page boundary. 1309 */ 1310 if (off & iomask) { 1311 cnt += off & iomask; 1312 off &= ~(u_quad_t)iomask; 1313 } 1314 if (off & PAGE_MASK) { 1315 cnt += off & PAGE_MASK; 1316 off &= ~(u_quad_t)PAGE_MASK; 1317 } 1318 lblkno = off / iosize; 1319 1320 if (vp->v_object && 1321 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1322 VM_OBJECT_WLOCK(vp->v_object); 1323 vm_object_page_clean(vp->v_object, off, off + cnt, 1324 OBJPC_SYNC); 1325 VM_OBJECT_WUNLOCK(vp->v_object); 1326 } 1327 1328 bo = &vp->v_bufobj; 1329 BO_LOCK(bo); 1330 while (cnt > 0) { 1331 struct buf *bp; 1332 1333 /* 1334 * If we have a buffer and it is marked B_DELWRI we 1335 * have to lock and write it. Otherwise the prior 1336 * write is assumed to have already been committed. 1337 * 1338 * gbincore() can return invalid buffers now so we 1339 * have to check that bit as well (though B_DELWRI 1340 * should not be set if B_INVAL is set there could be 1341 * a race here since we haven't locked the buffer). 1342 */ 1343 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1344 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1345 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1346 BO_LOCK(bo); 1347 continue; /* retry */ 1348 } 1349 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1350 B_DELWRI) { 1351 bremfree(bp); 1352 bp->b_flags &= ~B_ASYNC; 1353 bwrite(bp); 1354 ++nfs_commit_miss; 1355 } else 1356 BUF_UNLOCK(bp); 1357 BO_LOCK(bo); 1358 } 1359 ++nfs_commit_blks; 1360 if (cnt < iosize) 1361 break; 1362 cnt -= iosize; 1363 ++lblkno; 1364 } 1365 BO_UNLOCK(bo); 1366 } 1367 NFSEXITCODE(error); 1368 return (error); 1369 } 1370 1371 /* 1372 * Statfs vnode op. 1373 */ 1374 int 1375 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1376 { 1377 int error; 1378 1379 error = VFS_STATFS(vp->v_mount, sf); 1380 if (error == 0) { 1381 /* 1382 * Since NFS handles these values as unsigned on the 1383 * wire, there is no way to represent negative values, 1384 * so set them to 0. Without this, they will appear 1385 * to be very large positive values for clients like 1386 * Solaris10. 1387 */ 1388 if (sf->f_bavail < 0) 1389 sf->f_bavail = 0; 1390 if (sf->f_ffree < 0) 1391 sf->f_ffree = 0; 1392 } 1393 NFSEXITCODE(error); 1394 return (error); 1395 } 1396 1397 /* 1398 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1399 * must handle nfsrv_opencheck() calls after any other access checks. 1400 */ 1401 void 1402 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1403 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1404 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1405 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1406 struct nfsexstuff *exp, struct vnode **vpp) 1407 { 1408 struct vnode *vp = NULL; 1409 u_quad_t tempsize; 1410 struct nfsexstuff nes; 1411 1412 if (ndp->ni_vp == NULL) 1413 nd->nd_repstat = nfsrv_opencheck(clientid, 1414 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1415 if (!nd->nd_repstat) { 1416 if (ndp->ni_vp == NULL) { 1417 vrele(ndp->ni_startdir); 1418 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1419 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1420 vput(ndp->ni_dvp); 1421 nfsvno_relpathbuf(ndp); 1422 if (!nd->nd_repstat) { 1423 if (*exclusive_flagp) { 1424 *exclusive_flagp = 0; 1425 NFSVNO_ATTRINIT(nvap); 1426 nvap->na_atime.tv_sec = cverf[0]; 1427 nvap->na_atime.tv_nsec = cverf[1]; 1428 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1429 &nvap->na_vattr, cred); 1430 if (nd->nd_repstat != 0) { 1431 vput(ndp->ni_vp); 1432 ndp->ni_vp = NULL; 1433 nd->nd_repstat = NFSERR_NOTSUPP; 1434 } 1435 } else { 1436 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1437 aclp, p, attrbitp, exp); 1438 } 1439 } 1440 vp = ndp->ni_vp; 1441 } else { 1442 if (ndp->ni_startdir) 1443 vrele(ndp->ni_startdir); 1444 nfsvno_relpathbuf(ndp); 1445 vp = ndp->ni_vp; 1446 if (create == NFSV4OPEN_CREATE) { 1447 if (ndp->ni_dvp == vp) 1448 vrele(ndp->ni_dvp); 1449 else 1450 vput(ndp->ni_dvp); 1451 } 1452 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1453 if (ndp->ni_cnd.cn_flags & RDONLY) 1454 NFSVNO_SETEXRDONLY(&nes); 1455 else 1456 NFSVNO_EXINIT(&nes); 1457 nd->nd_repstat = nfsvno_accchk(vp, 1458 VWRITE, cred, &nes, p, 1459 NFSACCCHK_NOOVERRIDE, 1460 NFSACCCHK_VPISLOCKED, NULL); 1461 nd->nd_repstat = nfsrv_opencheck(clientid, 1462 stateidp, stp, vp, nd, p, nd->nd_repstat); 1463 if (!nd->nd_repstat) { 1464 tempsize = nvap->na_size; 1465 NFSVNO_ATTRINIT(nvap); 1466 nvap->na_size = tempsize; 1467 nd->nd_repstat = VOP_SETATTR(vp, 1468 &nvap->na_vattr, cred); 1469 } 1470 } else if (vp->v_type == VREG) { 1471 nd->nd_repstat = nfsrv_opencheck(clientid, 1472 stateidp, stp, vp, nd, p, nd->nd_repstat); 1473 } 1474 } 1475 } else { 1476 if (ndp->ni_cnd.cn_flags & HASBUF) 1477 nfsvno_relpathbuf(ndp); 1478 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1479 vrele(ndp->ni_startdir); 1480 if (ndp->ni_dvp == ndp->ni_vp) 1481 vrele(ndp->ni_dvp); 1482 else 1483 vput(ndp->ni_dvp); 1484 if (ndp->ni_vp) 1485 vput(ndp->ni_vp); 1486 } 1487 } 1488 *vpp = vp; 1489 1490 NFSEXITCODE2(0, nd); 1491 } 1492 1493 /* 1494 * Updates the file rev and sets the mtime and ctime 1495 * to the current clock time, returning the va_filerev and va_Xtime 1496 * values. 1497 * Return ESTALE to indicate the vnode is VI_DOOMED. 1498 */ 1499 int 1500 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1501 struct ucred *cred, struct thread *p) 1502 { 1503 struct vattr va; 1504 1505 VATTR_NULL(&va); 1506 vfs_timestamp(&va.va_mtime); 1507 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1508 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1509 if ((vp->v_iflag & VI_DOOMED) != 0) 1510 return (ESTALE); 1511 } 1512 (void) VOP_SETATTR(vp, &va, cred); 1513 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1514 return (0); 1515 } 1516 1517 /* 1518 * Glue routine to nfsv4_fillattr(). 1519 */ 1520 int 1521 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1522 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1523 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1524 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1525 { 1526 int error; 1527 1528 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1529 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1530 mounted_on_fileno); 1531 NFSEXITCODE2(0, nd); 1532 return (error); 1533 } 1534 1535 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1536 /* 1537 * nfs readdir service 1538 * - mallocs what it thinks is enough to read 1539 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1540 * - calls VOP_READDIR() 1541 * - loops around building the reply 1542 * if the output generated exceeds count break out of loop 1543 * The NFSM_CLGET macro is used here so that the reply will be packed 1544 * tightly in mbuf clusters. 1545 * - it trims out records with d_fileno == 0 1546 * this doesn't matter for Unix clients, but they might confuse clients 1547 * for other os'. 1548 * - it trims out records with d_type == DT_WHT 1549 * these cannot be seen through NFS (unless we extend the protocol) 1550 * The alternate call nfsrvd_readdirplus() does lookups as well. 1551 * PS: The NFS protocol spec. does not clarify what the "count" byte 1552 * argument is a count of.. just name strings and file id's or the 1553 * entire reply rpc or ... 1554 * I tried just file name and id sizes and it confused the Sun client, 1555 * so I am using the full rpc size now. The "paranoia.." comment refers 1556 * to including the status longwords that are not a part of the dir. 1557 * "entry" structures, but are in the rpc. 1558 */ 1559 int 1560 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1561 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1562 { 1563 struct dirent *dp; 1564 u_int32_t *tl; 1565 int dirlen; 1566 char *cpos, *cend, *rbuf; 1567 struct nfsvattr at; 1568 int nlen, error = 0, getret = 1; 1569 int siz, cnt, fullsiz, eofflag, ncookies; 1570 u_int64_t off, toff, verf; 1571 u_long *cookies = NULL, *cookiep; 1572 struct uio io; 1573 struct iovec iv; 1574 int is_ufs; 1575 1576 if (nd->nd_repstat) { 1577 nfsrv_postopattr(nd, getret, &at); 1578 goto out; 1579 } 1580 if (nd->nd_flag & ND_NFSV2) { 1581 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1582 off = fxdr_unsigned(u_quad_t, *tl++); 1583 } else { 1584 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1585 off = fxdr_hyper(tl); 1586 tl += 2; 1587 verf = fxdr_hyper(tl); 1588 tl += 2; 1589 } 1590 toff = off; 1591 cnt = fxdr_unsigned(int, *tl); 1592 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1593 cnt = NFS_SRVMAXDATA(nd); 1594 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1595 fullsiz = siz; 1596 if (nd->nd_flag & ND_NFSV3) { 1597 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1598 p, 1); 1599 #if 0 1600 /* 1601 * va_filerev is not sufficient as a cookie verifier, 1602 * since it is not supposed to change when entries are 1603 * removed/added unless that offset cookies returned to 1604 * the client are no longer valid. 1605 */ 1606 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1607 nd->nd_repstat = NFSERR_BAD_COOKIE; 1608 #endif 1609 } 1610 if (!nd->nd_repstat && vp->v_type != VDIR) 1611 nd->nd_repstat = NFSERR_NOTDIR; 1612 if (nd->nd_repstat == 0 && cnt == 0) { 1613 if (nd->nd_flag & ND_NFSV2) 1614 /* NFSv2 does not have NFSERR_TOOSMALL */ 1615 nd->nd_repstat = EPERM; 1616 else 1617 nd->nd_repstat = NFSERR_TOOSMALL; 1618 } 1619 if (!nd->nd_repstat) 1620 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1621 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1622 NFSACCCHK_VPISLOCKED, NULL); 1623 if (nd->nd_repstat) { 1624 vput(vp); 1625 if (nd->nd_flag & ND_NFSV3) 1626 nfsrv_postopattr(nd, getret, &at); 1627 goto out; 1628 } 1629 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1630 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1631 again: 1632 eofflag = 0; 1633 if (cookies) { 1634 free((caddr_t)cookies, M_TEMP); 1635 cookies = NULL; 1636 } 1637 1638 iv.iov_base = rbuf; 1639 iv.iov_len = siz; 1640 io.uio_iov = &iv; 1641 io.uio_iovcnt = 1; 1642 io.uio_offset = (off_t)off; 1643 io.uio_resid = siz; 1644 io.uio_segflg = UIO_SYSSPACE; 1645 io.uio_rw = UIO_READ; 1646 io.uio_td = NULL; 1647 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1648 &cookies); 1649 off = (u_int64_t)io.uio_offset; 1650 if (io.uio_resid) 1651 siz -= io.uio_resid; 1652 1653 if (!cookies && !nd->nd_repstat) 1654 nd->nd_repstat = NFSERR_PERM; 1655 if (nd->nd_flag & ND_NFSV3) { 1656 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1657 if (!nd->nd_repstat) 1658 nd->nd_repstat = getret; 1659 } 1660 1661 /* 1662 * Handles the failed cases. nd->nd_repstat == 0 past here. 1663 */ 1664 if (nd->nd_repstat) { 1665 vput(vp); 1666 free((caddr_t)rbuf, M_TEMP); 1667 if (cookies) 1668 free((caddr_t)cookies, M_TEMP); 1669 if (nd->nd_flag & ND_NFSV3) 1670 nfsrv_postopattr(nd, getret, &at); 1671 goto out; 1672 } 1673 /* 1674 * If nothing read, return eof 1675 * rpc reply 1676 */ 1677 if (siz == 0) { 1678 vput(vp); 1679 if (nd->nd_flag & ND_NFSV2) { 1680 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1681 } else { 1682 nfsrv_postopattr(nd, getret, &at); 1683 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1684 txdr_hyper(at.na_filerev, tl); 1685 tl += 2; 1686 } 1687 *tl++ = newnfs_false; 1688 *tl = newnfs_true; 1689 FREE((caddr_t)rbuf, M_TEMP); 1690 FREE((caddr_t)cookies, M_TEMP); 1691 goto out; 1692 } 1693 1694 /* 1695 * Check for degenerate cases of nothing useful read. 1696 * If so go try again 1697 */ 1698 cpos = rbuf; 1699 cend = rbuf + siz; 1700 dp = (struct dirent *)cpos; 1701 cookiep = cookies; 1702 1703 /* 1704 * For some reason FreeBSD's ufs_readdir() chooses to back the 1705 * directory offset up to a block boundary, so it is necessary to 1706 * skip over the records that precede the requested offset. This 1707 * requires the assumption that file offset cookies monotonically 1708 * increase. 1709 */ 1710 while (cpos < cend && ncookies > 0 && 1711 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1712 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 1713 cpos += dp->d_reclen; 1714 dp = (struct dirent *)cpos; 1715 cookiep++; 1716 ncookies--; 1717 } 1718 if (cpos >= cend || ncookies == 0) { 1719 siz = fullsiz; 1720 toff = off; 1721 goto again; 1722 } 1723 vput(vp); 1724 1725 /* 1726 * dirlen is the size of the reply, including all XDR and must 1727 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1728 * if the XDR should be included in "count", but to be safe, we do. 1729 * (Include the two booleans at the end of the reply in dirlen now.) 1730 */ 1731 if (nd->nd_flag & ND_NFSV3) { 1732 nfsrv_postopattr(nd, getret, &at); 1733 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1734 txdr_hyper(at.na_filerev, tl); 1735 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1736 } else { 1737 dirlen = 2 * NFSX_UNSIGNED; 1738 } 1739 1740 /* Loop through the records and build reply */ 1741 while (cpos < cend && ncookies > 0) { 1742 nlen = dp->d_namlen; 1743 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1744 nlen <= NFS_MAXNAMLEN) { 1745 if (nd->nd_flag & ND_NFSV3) 1746 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1747 else 1748 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1749 if (dirlen > cnt) { 1750 eofflag = 0; 1751 break; 1752 } 1753 1754 /* 1755 * Build the directory record xdr from 1756 * the dirent entry. 1757 */ 1758 if (nd->nd_flag & ND_NFSV3) { 1759 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1760 *tl++ = newnfs_true; 1761 *tl++ = 0; 1762 } else { 1763 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1764 *tl++ = newnfs_true; 1765 } 1766 *tl = txdr_unsigned(dp->d_fileno); 1767 (void) nfsm_strtom(nd, dp->d_name, nlen); 1768 if (nd->nd_flag & ND_NFSV3) { 1769 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1770 *tl++ = 0; 1771 } else 1772 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1773 *tl = txdr_unsigned(*cookiep); 1774 } 1775 cpos += dp->d_reclen; 1776 dp = (struct dirent *)cpos; 1777 cookiep++; 1778 ncookies--; 1779 } 1780 if (cpos < cend) 1781 eofflag = 0; 1782 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1783 *tl++ = newnfs_false; 1784 if (eofflag) 1785 *tl = newnfs_true; 1786 else 1787 *tl = newnfs_false; 1788 FREE((caddr_t)rbuf, M_TEMP); 1789 FREE((caddr_t)cookies, M_TEMP); 1790 1791 out: 1792 NFSEXITCODE2(0, nd); 1793 return (0); 1794 nfsmout: 1795 vput(vp); 1796 NFSEXITCODE2(error, nd); 1797 return (error); 1798 } 1799 1800 /* 1801 * Readdirplus for V3 and Readdir for V4. 1802 */ 1803 int 1804 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1805 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1806 { 1807 struct dirent *dp; 1808 u_int32_t *tl; 1809 int dirlen; 1810 char *cpos, *cend, *rbuf; 1811 struct vnode *nvp; 1812 fhandle_t nfh; 1813 struct nfsvattr nva, at, *nvap = &nva; 1814 struct mbuf *mb0, *mb1; 1815 struct nfsreferral *refp; 1816 int nlen, r, error = 0, getret = 1, usevget = 1; 1817 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1818 caddr_t bpos0, bpos1; 1819 u_int64_t off, toff, verf; 1820 u_long *cookies = NULL, *cookiep; 1821 nfsattrbit_t attrbits, rderrbits, savbits; 1822 struct uio io; 1823 struct iovec iv; 1824 struct componentname cn; 1825 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 1826 struct mount *mp, *new_mp; 1827 uint64_t mounted_on_fileno; 1828 1829 if (nd->nd_repstat) { 1830 nfsrv_postopattr(nd, getret, &at); 1831 goto out; 1832 } 1833 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1834 off = fxdr_hyper(tl); 1835 toff = off; 1836 tl += 2; 1837 verf = fxdr_hyper(tl); 1838 tl += 2; 1839 siz = fxdr_unsigned(int, *tl++); 1840 cnt = fxdr_unsigned(int, *tl); 1841 1842 /* 1843 * Use the server's maximum data transfer size as the upper bound 1844 * on reply datalen. 1845 */ 1846 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1847 cnt = NFS_SRVMAXDATA(nd); 1848 1849 /* 1850 * siz is a "hint" of how much directory information (name, fileid, 1851 * cookie) should be in the reply. At least one client "hints" 0, 1852 * so I set it to cnt for that case. I also round it up to the 1853 * next multiple of DIRBLKSIZ. 1854 */ 1855 if (siz <= 0) 1856 siz = cnt; 1857 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1858 1859 if (nd->nd_flag & ND_NFSV4) { 1860 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1861 if (error) 1862 goto nfsmout; 1863 NFSSET_ATTRBIT(&savbits, &attrbits); 1864 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1865 NFSZERO_ATTRBIT(&rderrbits); 1866 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1867 } else { 1868 NFSZERO_ATTRBIT(&attrbits); 1869 } 1870 fullsiz = siz; 1871 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1872 if (!nd->nd_repstat) { 1873 if (off && verf != at.na_filerev) { 1874 /* 1875 * va_filerev is not sufficient as a cookie verifier, 1876 * since it is not supposed to change when entries are 1877 * removed/added unless that offset cookies returned to 1878 * the client are no longer valid. 1879 */ 1880 #if 0 1881 if (nd->nd_flag & ND_NFSV4) { 1882 nd->nd_repstat = NFSERR_NOTSAME; 1883 } else { 1884 nd->nd_repstat = NFSERR_BAD_COOKIE; 1885 } 1886 #endif 1887 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1888 nd->nd_repstat = NFSERR_BAD_COOKIE; 1889 } 1890 } 1891 if (!nd->nd_repstat && vp->v_type != VDIR) 1892 nd->nd_repstat = NFSERR_NOTDIR; 1893 if (!nd->nd_repstat && cnt == 0) 1894 nd->nd_repstat = NFSERR_TOOSMALL; 1895 if (!nd->nd_repstat) 1896 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1897 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1898 NFSACCCHK_VPISLOCKED, NULL); 1899 if (nd->nd_repstat) { 1900 vput(vp); 1901 if (nd->nd_flag & ND_NFSV3) 1902 nfsrv_postopattr(nd, getret, &at); 1903 goto out; 1904 } 1905 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1906 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 1907 1908 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1909 again: 1910 eofflag = 0; 1911 if (cookies) { 1912 free((caddr_t)cookies, M_TEMP); 1913 cookies = NULL; 1914 } 1915 1916 iv.iov_base = rbuf; 1917 iv.iov_len = siz; 1918 io.uio_iov = &iv; 1919 io.uio_iovcnt = 1; 1920 io.uio_offset = (off_t)off; 1921 io.uio_resid = siz; 1922 io.uio_segflg = UIO_SYSSPACE; 1923 io.uio_rw = UIO_READ; 1924 io.uio_td = NULL; 1925 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1926 &cookies); 1927 off = (u_int64_t)io.uio_offset; 1928 if (io.uio_resid) 1929 siz -= io.uio_resid; 1930 1931 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1932 1933 if (!cookies && !nd->nd_repstat) 1934 nd->nd_repstat = NFSERR_PERM; 1935 if (!nd->nd_repstat) 1936 nd->nd_repstat = getret; 1937 if (nd->nd_repstat) { 1938 vput(vp); 1939 if (cookies) 1940 free((caddr_t)cookies, M_TEMP); 1941 free((caddr_t)rbuf, M_TEMP); 1942 if (nd->nd_flag & ND_NFSV3) 1943 nfsrv_postopattr(nd, getret, &at); 1944 goto out; 1945 } 1946 /* 1947 * If nothing read, return eof 1948 * rpc reply 1949 */ 1950 if (siz == 0) { 1951 vput(vp); 1952 if (nd->nd_flag & ND_NFSV3) 1953 nfsrv_postopattr(nd, getret, &at); 1954 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1955 txdr_hyper(at.na_filerev, tl); 1956 tl += 2; 1957 *tl++ = newnfs_false; 1958 *tl = newnfs_true; 1959 free((caddr_t)cookies, M_TEMP); 1960 free((caddr_t)rbuf, M_TEMP); 1961 goto out; 1962 } 1963 1964 /* 1965 * Check for degenerate cases of nothing useful read. 1966 * If so go try again 1967 */ 1968 cpos = rbuf; 1969 cend = rbuf + siz; 1970 dp = (struct dirent *)cpos; 1971 cookiep = cookies; 1972 1973 /* 1974 * For some reason FreeBSD's ufs_readdir() chooses to back the 1975 * directory offset up to a block boundary, so it is necessary to 1976 * skip over the records that precede the requested offset. This 1977 * requires the assumption that file offset cookies monotonically 1978 * increase. 1979 */ 1980 while (cpos < cend && ncookies > 0 && 1981 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1982 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 1983 ((nd->nd_flag & ND_NFSV4) && 1984 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1985 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1986 cpos += dp->d_reclen; 1987 dp = (struct dirent *)cpos; 1988 cookiep++; 1989 ncookies--; 1990 } 1991 if (cpos >= cend || ncookies == 0) { 1992 siz = fullsiz; 1993 toff = off; 1994 goto again; 1995 } 1996 1997 /* 1998 * Busy the file system so that the mount point won't go away 1999 * and, as such, VFS_VGET() can be used safely. 2000 */ 2001 mp = vp->v_mount; 2002 vfs_ref(mp); 2003 NFSVOPUNLOCK(vp, 0); 2004 nd->nd_repstat = vfs_busy(mp, 0); 2005 vfs_rel(mp); 2006 if (nd->nd_repstat != 0) { 2007 vrele(vp); 2008 free(cookies, M_TEMP); 2009 free(rbuf, M_TEMP); 2010 if (nd->nd_flag & ND_NFSV3) 2011 nfsrv_postopattr(nd, getret, &at); 2012 goto out; 2013 } 2014 2015 /* 2016 * Check to see if entries in this directory can be safely acquired 2017 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2018 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2019 * automount of the snapshot directory that is required will 2020 * be done. 2021 * This needs to be done here for NFSv4, since NFSv4 never does 2022 * a VFS_VGET() for "." or "..". 2023 */ 2024 if (is_zfs == 1) { 2025 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2026 if (r == EOPNOTSUPP) { 2027 usevget = 0; 2028 cn.cn_nameiop = LOOKUP; 2029 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2030 cn.cn_cred = nd->nd_cred; 2031 cn.cn_thread = p; 2032 } else if (r == 0) 2033 vput(nvp); 2034 } 2035 2036 /* 2037 * Save this position, in case there is an error before one entry 2038 * is created. 2039 */ 2040 mb0 = nd->nd_mb; 2041 bpos0 = nd->nd_bpos; 2042 2043 /* 2044 * Fill in the first part of the reply. 2045 * dirlen is the reply length in bytes and cannot exceed cnt. 2046 * (Include the two booleans at the end of the reply in dirlen now, 2047 * so we recognize when we have exceeded cnt.) 2048 */ 2049 if (nd->nd_flag & ND_NFSV3) { 2050 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2051 nfsrv_postopattr(nd, getret, &at); 2052 } else { 2053 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2054 } 2055 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2056 txdr_hyper(at.na_filerev, tl); 2057 2058 /* 2059 * Save this position, in case there is an empty reply needed. 2060 */ 2061 mb1 = nd->nd_mb; 2062 bpos1 = nd->nd_bpos; 2063 2064 /* Loop through the records and build reply */ 2065 entrycnt = 0; 2066 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2067 nlen = dp->d_namlen; 2068 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2069 nlen <= NFS_MAXNAMLEN && 2070 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2071 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2072 || (nlen == 1 && dp->d_name[0] != '.'))) { 2073 /* 2074 * Save the current position in the reply, in case 2075 * this entry exceeds cnt. 2076 */ 2077 mb1 = nd->nd_mb; 2078 bpos1 = nd->nd_bpos; 2079 2080 /* 2081 * For readdir_and_lookup get the vnode using 2082 * the file number. 2083 */ 2084 nvp = NULL; 2085 refp = NULL; 2086 r = 0; 2087 at_root = 0; 2088 needs_unbusy = 0; 2089 new_mp = mp; 2090 mounted_on_fileno = (uint64_t)dp->d_fileno; 2091 if ((nd->nd_flag & ND_NFSV3) || 2092 NFSNONZERO_ATTRBIT(&savbits)) { 2093 if (nd->nd_flag & ND_NFSV4) 2094 refp = nfsv4root_getreferral(NULL, 2095 vp, dp->d_fileno); 2096 if (refp == NULL) { 2097 if (usevget) 2098 r = VFS_VGET(mp, dp->d_fileno, 2099 LK_SHARED, &nvp); 2100 else 2101 r = EOPNOTSUPP; 2102 if (r == EOPNOTSUPP) { 2103 if (usevget) { 2104 usevget = 0; 2105 cn.cn_nameiop = LOOKUP; 2106 cn.cn_lkflags = 2107 LK_SHARED | 2108 LK_RETRY; 2109 cn.cn_cred = 2110 nd->nd_cred; 2111 cn.cn_thread = p; 2112 } 2113 cn.cn_nameptr = dp->d_name; 2114 cn.cn_namelen = nlen; 2115 cn.cn_flags = ISLASTCN | 2116 NOFOLLOW | LOCKLEAF; 2117 if (nlen == 2 && 2118 dp->d_name[0] == '.' && 2119 dp->d_name[1] == '.') 2120 cn.cn_flags |= 2121 ISDOTDOT; 2122 if (NFSVOPLOCK(vp, LK_SHARED) 2123 != 0) { 2124 nd->nd_repstat = EPERM; 2125 break; 2126 } 2127 if ((vp->v_vflag & VV_ROOT) != 0 2128 && (cn.cn_flags & ISDOTDOT) 2129 != 0) { 2130 vref(vp); 2131 nvp = vp; 2132 r = 0; 2133 } else { 2134 r = VOP_LOOKUP(vp, &nvp, 2135 &cn); 2136 if (vp != nvp) 2137 NFSVOPUNLOCK(vp, 2138 0); 2139 } 2140 } 2141 2142 /* 2143 * For NFSv4, check to see if nvp is 2144 * a mount point and get the mount 2145 * point vnode, as required. 2146 */ 2147 if (r == 0 && 2148 nfsrv_enable_crossmntpt != 0 && 2149 (nd->nd_flag & ND_NFSV4) != 0 && 2150 nvp->v_type == VDIR && 2151 nvp->v_mountedhere != NULL) { 2152 new_mp = nvp->v_mountedhere; 2153 r = vfs_busy(new_mp, 0); 2154 vput(nvp); 2155 nvp = NULL; 2156 if (r == 0) { 2157 r = VFS_ROOT(new_mp, 2158 LK_SHARED, &nvp); 2159 needs_unbusy = 1; 2160 if (r == 0) 2161 at_root = 1; 2162 } 2163 } 2164 } 2165 if (!r) { 2166 if (refp == NULL && 2167 ((nd->nd_flag & ND_NFSV3) || 2168 NFSNONZERO_ATTRBIT(&attrbits))) { 2169 r = nfsvno_getfh(nvp, &nfh, p); 2170 if (!r) 2171 r = nfsvno_getattr(nvp, nvap, 2172 nd->nd_cred, p, 1); 2173 if (r == 0 && is_zfs == 1 && 2174 nfsrv_enable_crossmntpt != 0 && 2175 (nd->nd_flag & ND_NFSV4) != 0 && 2176 nvp->v_type == VDIR && 2177 vp->v_mount != nvp->v_mount) { 2178 /* 2179 * For a ZFS snapshot, there is a 2180 * pseudo mount that does not set 2181 * v_mountedhere, so it needs to 2182 * be detected via a different 2183 * mount structure. 2184 */ 2185 at_root = 1; 2186 if (new_mp == mp) 2187 new_mp = nvp->v_mount; 2188 } 2189 } 2190 } else { 2191 nvp = NULL; 2192 } 2193 if (r) { 2194 if (!NFSISSET_ATTRBIT(&attrbits, 2195 NFSATTRBIT_RDATTRERROR)) { 2196 if (nvp != NULL) 2197 vput(nvp); 2198 if (needs_unbusy != 0) 2199 vfs_unbusy(new_mp); 2200 nd->nd_repstat = r; 2201 break; 2202 } 2203 } 2204 } 2205 2206 /* 2207 * Build the directory record xdr 2208 */ 2209 if (nd->nd_flag & ND_NFSV3) { 2210 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2211 *tl++ = newnfs_true; 2212 *tl++ = 0; 2213 *tl = txdr_unsigned(dp->d_fileno); 2214 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2215 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2216 *tl++ = 0; 2217 *tl = txdr_unsigned(*cookiep); 2218 nfsrv_postopattr(nd, 0, nvap); 2219 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2220 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2221 if (nvp != NULL) 2222 vput(nvp); 2223 } else { 2224 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2225 *tl++ = newnfs_true; 2226 *tl++ = 0; 2227 *tl = txdr_unsigned(*cookiep); 2228 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2229 if (nvp != NULL) { 2230 supports_nfsv4acls = 2231 nfs_supportsnfsv4acls(nvp); 2232 NFSVOPUNLOCK(nvp, 0); 2233 } else 2234 supports_nfsv4acls = 0; 2235 if (refp != NULL) { 2236 dirlen += nfsrv_putreferralattr(nd, 2237 &savbits, refp, 0, 2238 &nd->nd_repstat); 2239 if (nd->nd_repstat) { 2240 if (nvp != NULL) 2241 vrele(nvp); 2242 if (needs_unbusy != 0) 2243 vfs_unbusy(new_mp); 2244 break; 2245 } 2246 } else if (r) { 2247 dirlen += nfsvno_fillattr(nd, new_mp, 2248 nvp, nvap, &nfh, r, &rderrbits, 2249 nd->nd_cred, p, isdgram, 0, 2250 supports_nfsv4acls, at_root, 2251 mounted_on_fileno); 2252 } else { 2253 dirlen += nfsvno_fillattr(nd, new_mp, 2254 nvp, nvap, &nfh, r, &attrbits, 2255 nd->nd_cred, p, isdgram, 0, 2256 supports_nfsv4acls, at_root, 2257 mounted_on_fileno); 2258 } 2259 if (nvp != NULL) 2260 vrele(nvp); 2261 dirlen += (3 * NFSX_UNSIGNED); 2262 } 2263 if (needs_unbusy != 0) 2264 vfs_unbusy(new_mp); 2265 if (dirlen <= cnt) 2266 entrycnt++; 2267 } 2268 cpos += dp->d_reclen; 2269 dp = (struct dirent *)cpos; 2270 cookiep++; 2271 ncookies--; 2272 } 2273 vrele(vp); 2274 vfs_unbusy(mp); 2275 2276 /* 2277 * If dirlen > cnt, we must strip off the last entry. If that 2278 * results in an empty reply, report NFSERR_TOOSMALL. 2279 */ 2280 if (dirlen > cnt || nd->nd_repstat) { 2281 if (!nd->nd_repstat && entrycnt == 0) 2282 nd->nd_repstat = NFSERR_TOOSMALL; 2283 if (nd->nd_repstat) { 2284 newnfs_trimtrailing(nd, mb0, bpos0); 2285 if (nd->nd_flag & ND_NFSV3) 2286 nfsrv_postopattr(nd, getret, &at); 2287 } else 2288 newnfs_trimtrailing(nd, mb1, bpos1); 2289 eofflag = 0; 2290 } else if (cpos < cend) 2291 eofflag = 0; 2292 if (!nd->nd_repstat) { 2293 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2294 *tl++ = newnfs_false; 2295 if (eofflag) 2296 *tl = newnfs_true; 2297 else 2298 *tl = newnfs_false; 2299 } 2300 FREE((caddr_t)cookies, M_TEMP); 2301 FREE((caddr_t)rbuf, M_TEMP); 2302 2303 out: 2304 NFSEXITCODE2(0, nd); 2305 return (0); 2306 nfsmout: 2307 vput(vp); 2308 NFSEXITCODE2(error, nd); 2309 return (error); 2310 } 2311 2312 /* 2313 * Get the settable attributes out of the mbuf list. 2314 * (Return 0 or EBADRPC) 2315 */ 2316 int 2317 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2318 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2319 { 2320 u_int32_t *tl; 2321 struct nfsv2_sattr *sp; 2322 int error = 0, toclient = 0; 2323 2324 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2325 case ND_NFSV2: 2326 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2327 /* 2328 * Some old clients didn't fill in the high order 16bits. 2329 * --> check the low order 2 bytes for 0xffff 2330 */ 2331 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2332 nvap->na_mode = nfstov_mode(sp->sa_mode); 2333 if (sp->sa_uid != newnfs_xdrneg1) 2334 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2335 if (sp->sa_gid != newnfs_xdrneg1) 2336 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2337 if (sp->sa_size != newnfs_xdrneg1) 2338 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2339 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2340 #ifdef notyet 2341 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2342 #else 2343 nvap->na_atime.tv_sec = 2344 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2345 nvap->na_atime.tv_nsec = 0; 2346 #endif 2347 } 2348 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2349 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2350 break; 2351 case ND_NFSV3: 2352 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2353 if (*tl == newnfs_true) { 2354 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2355 nvap->na_mode = nfstov_mode(*tl); 2356 } 2357 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2358 if (*tl == newnfs_true) { 2359 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2360 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2361 } 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_gid = fxdr_unsigned(gid_t, *tl); 2366 } 2367 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2368 if (*tl == newnfs_true) { 2369 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2370 nvap->na_size = fxdr_hyper(tl); 2371 } 2372 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2373 switch (fxdr_unsigned(int, *tl)) { 2374 case NFSV3SATTRTIME_TOCLIENT: 2375 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2376 fxdr_nfsv3time(tl, &nvap->na_atime); 2377 toclient = 1; 2378 break; 2379 case NFSV3SATTRTIME_TOSERVER: 2380 vfs_timestamp(&nvap->na_atime); 2381 nvap->na_vaflags |= VA_UTIMES_NULL; 2382 break; 2383 } 2384 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2385 switch (fxdr_unsigned(int, *tl)) { 2386 case NFSV3SATTRTIME_TOCLIENT: 2387 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2388 fxdr_nfsv3time(tl, &nvap->na_mtime); 2389 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2390 break; 2391 case NFSV3SATTRTIME_TOSERVER: 2392 vfs_timestamp(&nvap->na_mtime); 2393 if (!toclient) 2394 nvap->na_vaflags |= VA_UTIMES_NULL; 2395 break; 2396 } 2397 break; 2398 case ND_NFSV4: 2399 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2400 } 2401 nfsmout: 2402 NFSEXITCODE2(error, nd); 2403 return (error); 2404 } 2405 2406 /* 2407 * Handle the setable attributes for V4. 2408 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2409 */ 2410 int 2411 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2412 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2413 { 2414 u_int32_t *tl; 2415 int attrsum = 0; 2416 int i, j; 2417 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2418 int toclient = 0; 2419 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2420 uid_t uid; 2421 gid_t gid; 2422 2423 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2424 if (error) 2425 goto nfsmout; 2426 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2427 attrsize = fxdr_unsigned(int, *tl); 2428 2429 /* 2430 * Loop around getting the setable attributes. If an unsupported 2431 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2432 */ 2433 if (retnotsup) { 2434 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2435 bitpos = NFSATTRBIT_MAX; 2436 } else { 2437 bitpos = 0; 2438 } 2439 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2440 if (attrsum > attrsize) { 2441 error = NFSERR_BADXDR; 2442 goto nfsmout; 2443 } 2444 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2445 switch (bitpos) { 2446 case NFSATTRBIT_SIZE: 2447 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2448 if (vp != NULL && vp->v_type != VREG) { 2449 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2450 NFSERR_INVAL; 2451 goto nfsmout; 2452 } 2453 nvap->na_size = fxdr_hyper(tl); 2454 attrsum += NFSX_HYPER; 2455 break; 2456 case NFSATTRBIT_ACL: 2457 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2458 p); 2459 if (error) 2460 goto nfsmout; 2461 if (aceerr && !nd->nd_repstat) 2462 nd->nd_repstat = aceerr; 2463 attrsum += aclsize; 2464 break; 2465 case NFSATTRBIT_ARCHIVE: 2466 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2467 if (!nd->nd_repstat) 2468 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2469 attrsum += NFSX_UNSIGNED; 2470 break; 2471 case NFSATTRBIT_HIDDEN: 2472 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2473 if (!nd->nd_repstat) 2474 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2475 attrsum += NFSX_UNSIGNED; 2476 break; 2477 case NFSATTRBIT_MIMETYPE: 2478 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2479 i = fxdr_unsigned(int, *tl); 2480 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2481 if (error) 2482 goto nfsmout; 2483 if (!nd->nd_repstat) 2484 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2485 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2486 break; 2487 case NFSATTRBIT_MODE: 2488 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2489 nvap->na_mode = nfstov_mode(*tl); 2490 attrsum += NFSX_UNSIGNED; 2491 break; 2492 case NFSATTRBIT_OWNER: 2493 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2494 j = fxdr_unsigned(int, *tl); 2495 if (j < 0) { 2496 error = NFSERR_BADXDR; 2497 goto nfsmout; 2498 } 2499 if (j > NFSV4_SMALLSTR) 2500 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2501 else 2502 cp = namestr; 2503 error = nfsrv_mtostr(nd, cp, j); 2504 if (error) { 2505 if (j > NFSV4_SMALLSTR) 2506 free(cp, M_NFSSTRING); 2507 goto nfsmout; 2508 } 2509 if (!nd->nd_repstat) { 2510 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2511 p); 2512 if (!nd->nd_repstat) 2513 nvap->na_uid = uid; 2514 } 2515 if (j > NFSV4_SMALLSTR) 2516 free(cp, M_NFSSTRING); 2517 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2518 break; 2519 case NFSATTRBIT_OWNERGROUP: 2520 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2521 j = fxdr_unsigned(int, *tl); 2522 if (j < 0) { 2523 error = NFSERR_BADXDR; 2524 goto nfsmout; 2525 } 2526 if (j > NFSV4_SMALLSTR) 2527 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2528 else 2529 cp = namestr; 2530 error = nfsrv_mtostr(nd, cp, j); 2531 if (error) { 2532 if (j > NFSV4_SMALLSTR) 2533 free(cp, M_NFSSTRING); 2534 goto nfsmout; 2535 } 2536 if (!nd->nd_repstat) { 2537 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2538 p); 2539 if (!nd->nd_repstat) 2540 nvap->na_gid = gid; 2541 } 2542 if (j > NFSV4_SMALLSTR) 2543 free(cp, M_NFSSTRING); 2544 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2545 break; 2546 case NFSATTRBIT_SYSTEM: 2547 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2548 if (!nd->nd_repstat) 2549 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2550 attrsum += NFSX_UNSIGNED; 2551 break; 2552 case NFSATTRBIT_TIMEACCESSSET: 2553 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2554 attrsum += NFSX_UNSIGNED; 2555 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2556 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2557 fxdr_nfsv4time(tl, &nvap->na_atime); 2558 toclient = 1; 2559 attrsum += NFSX_V4TIME; 2560 } else { 2561 vfs_timestamp(&nvap->na_atime); 2562 nvap->na_vaflags |= VA_UTIMES_NULL; 2563 } 2564 break; 2565 case NFSATTRBIT_TIMEBACKUP: 2566 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2567 if (!nd->nd_repstat) 2568 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2569 attrsum += NFSX_V4TIME; 2570 break; 2571 case NFSATTRBIT_TIMECREATE: 2572 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2573 if (!nd->nd_repstat) 2574 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2575 attrsum += NFSX_V4TIME; 2576 break; 2577 case NFSATTRBIT_TIMEMODIFYSET: 2578 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2579 attrsum += NFSX_UNSIGNED; 2580 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2581 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2582 fxdr_nfsv4time(tl, &nvap->na_mtime); 2583 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2584 attrsum += NFSX_V4TIME; 2585 } else { 2586 vfs_timestamp(&nvap->na_mtime); 2587 if (!toclient) 2588 nvap->na_vaflags |= VA_UTIMES_NULL; 2589 } 2590 break; 2591 default: 2592 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2593 /* 2594 * set bitpos so we drop out of the loop. 2595 */ 2596 bitpos = NFSATTRBIT_MAX; 2597 break; 2598 } 2599 } 2600 2601 /* 2602 * some clients pad the attrlist, so we need to skip over the 2603 * padding. 2604 */ 2605 if (attrsum > attrsize) { 2606 error = NFSERR_BADXDR; 2607 } else { 2608 attrsize = NFSM_RNDUP(attrsize); 2609 if (attrsum < attrsize) 2610 error = nfsm_advance(nd, attrsize - attrsum, -1); 2611 } 2612 nfsmout: 2613 NFSEXITCODE2(error, nd); 2614 return (error); 2615 } 2616 2617 /* 2618 * Check/setup export credentials. 2619 */ 2620 int 2621 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2622 struct ucred *credanon) 2623 { 2624 int error = 0; 2625 2626 /* 2627 * Check/setup credentials. 2628 */ 2629 if (nd->nd_flag & ND_GSS) 2630 exp->nes_exflag &= ~MNT_EXPORTANON; 2631 2632 /* 2633 * Check to see if the operation is allowed for this security flavor. 2634 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2635 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2636 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2637 */ 2638 if (nfsvno_testexp(nd, exp) && 2639 nd->nd_procnum != NFSV4OP_SECINFO && 2640 nd->nd_procnum != NFSPROC_FSINFO) { 2641 if (nd->nd_flag & ND_NFSV4) 2642 error = NFSERR_WRONGSEC; 2643 else 2644 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2645 goto out; 2646 } 2647 2648 /* 2649 * Check to see if the file system is exported V4 only. 2650 */ 2651 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2652 error = NFSERR_PROGNOTV4; 2653 goto out; 2654 } 2655 2656 /* 2657 * Now, map the user credentials. 2658 * (Note that ND_AUTHNONE will only be set for an NFSv3 2659 * Fsinfo RPC. If set for anything else, this code might need 2660 * to change.) 2661 */ 2662 if (NFSVNO_EXPORTED(exp)) { 2663 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2664 NFSVNO_EXPORTANON(exp) || 2665 (nd->nd_flag & ND_AUTHNONE) != 0) { 2666 nd->nd_cred->cr_uid = credanon->cr_uid; 2667 nd->nd_cred->cr_gid = credanon->cr_gid; 2668 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2669 credanon->cr_groups); 2670 } else if ((nd->nd_flag & ND_GSS) == 0) { 2671 /* 2672 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2673 * if there is a replacement credential with a group 2674 * list set up by "nfsuserd -manage-gids". 2675 * If there is no replacement, nfsrv_getgrpscred() 2676 * simply returns its argument. 2677 */ 2678 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2679 } 2680 } 2681 2682 out: 2683 NFSEXITCODE2(error, nd); 2684 return (error); 2685 } 2686 2687 /* 2688 * Check exports. 2689 */ 2690 int 2691 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2692 struct ucred **credp) 2693 { 2694 int i, error, *secflavors; 2695 2696 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2697 &exp->nes_numsecflavor, &secflavors); 2698 if (error) { 2699 if (nfs_rootfhset) { 2700 exp->nes_exflag = 0; 2701 exp->nes_numsecflavor = 0; 2702 error = 0; 2703 } 2704 } else { 2705 /* Copy the security flavors. */ 2706 for (i = 0; i < exp->nes_numsecflavor; i++) 2707 exp->nes_secflavors[i] = secflavors[i]; 2708 } 2709 NFSEXITCODE(error); 2710 return (error); 2711 } 2712 2713 /* 2714 * Get a vnode for a file handle and export stuff. 2715 */ 2716 int 2717 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2718 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2719 struct ucred **credp) 2720 { 2721 int i, error, *secflavors; 2722 2723 *credp = NULL; 2724 exp->nes_numsecflavor = 0; 2725 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2726 if (error != 0) 2727 /* Make sure the server replies ESTALE to the client. */ 2728 error = ESTALE; 2729 if (nam && !error) { 2730 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2731 &exp->nes_numsecflavor, &secflavors); 2732 if (error) { 2733 if (nfs_rootfhset) { 2734 exp->nes_exflag = 0; 2735 exp->nes_numsecflavor = 0; 2736 error = 0; 2737 } else { 2738 vput(*vpp); 2739 } 2740 } else { 2741 /* Copy the security flavors. */ 2742 for (i = 0; i < exp->nes_numsecflavor; i++) 2743 exp->nes_secflavors[i] = secflavors[i]; 2744 } 2745 } 2746 NFSEXITCODE(error); 2747 return (error); 2748 } 2749 2750 /* 2751 * nfsd_fhtovp() - convert a fh to a vnode ptr 2752 * - look up fsid in mount list (if not found ret error) 2753 * - get vp and export rights by calling nfsvno_fhtovp() 2754 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2755 * for AUTH_SYS 2756 * - if mpp != NULL, return the mount point so that it can 2757 * be used for vn_finished_write() by the caller 2758 */ 2759 void 2760 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2761 struct vnode **vpp, struct nfsexstuff *exp, 2762 struct mount **mpp, int startwrite, struct thread *p) 2763 { 2764 struct mount *mp; 2765 struct ucred *credanon; 2766 fhandle_t *fhp; 2767 2768 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2769 /* 2770 * Check for the special case of the nfsv4root_fh. 2771 */ 2772 mp = vfs_busyfs(&fhp->fh_fsid); 2773 if (mpp != NULL) 2774 *mpp = mp; 2775 if (mp == NULL) { 2776 *vpp = NULL; 2777 nd->nd_repstat = ESTALE; 2778 goto out; 2779 } 2780 2781 if (startwrite) { 2782 vn_start_write(NULL, mpp, V_WAIT); 2783 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2784 lktype = LK_EXCLUSIVE; 2785 } 2786 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2787 &credanon); 2788 vfs_unbusy(mp); 2789 2790 /* 2791 * For NFSv4 without a pseudo root fs, unexported file handles 2792 * can be returned, so that Lookup works everywhere. 2793 */ 2794 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2795 !(nd->nd_flag & ND_NFSV4)) { 2796 vput(*vpp); 2797 nd->nd_repstat = EACCES; 2798 } 2799 2800 /* 2801 * Personally, I've never seen any point in requiring a 2802 * reserved port#, since only in the rare case where the 2803 * clients are all boxes with secure system privileges, 2804 * does it provide any enhanced security, but... some people 2805 * believe it to be useful and keep putting this code back in. 2806 * (There is also some "security checker" out there that 2807 * complains if the nfs server doesn't enforce this.) 2808 * However, note the following: 2809 * RFC3530 (NFSv4) specifies that a reserved port# not be 2810 * required. 2811 * RFC2623 recommends that, if a reserved port# is checked for, 2812 * that there be a way to turn that off--> ifdef'd. 2813 */ 2814 #ifdef NFS_REQRSVPORT 2815 if (!nd->nd_repstat) { 2816 struct sockaddr_in *saddr; 2817 struct sockaddr_in6 *saddr6; 2818 2819 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2820 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2821 if (!(nd->nd_flag & ND_NFSV4) && 2822 ((saddr->sin_family == AF_INET && 2823 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2824 (saddr6->sin6_family == AF_INET6 && 2825 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2826 vput(*vpp); 2827 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2828 } 2829 } 2830 #endif /* NFS_REQRSVPORT */ 2831 2832 /* 2833 * Check/setup credentials. 2834 */ 2835 if (!nd->nd_repstat) { 2836 nd->nd_saveduid = nd->nd_cred->cr_uid; 2837 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2838 if (nd->nd_repstat) 2839 vput(*vpp); 2840 } 2841 if (credanon != NULL) 2842 crfree(credanon); 2843 if (nd->nd_repstat) { 2844 if (startwrite) 2845 vn_finished_write(mp); 2846 *vpp = NULL; 2847 if (mpp != NULL) 2848 *mpp = NULL; 2849 } 2850 2851 out: 2852 NFSEXITCODE2(0, nd); 2853 } 2854 2855 /* 2856 * glue for fp. 2857 */ 2858 static int 2859 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2860 { 2861 struct filedesc *fdp; 2862 struct file *fp; 2863 int error = 0; 2864 2865 fdp = p->td_proc->p_fd; 2866 if (fd < 0 || fd >= fdp->fd_nfiles || 2867 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2868 error = EBADF; 2869 goto out; 2870 } 2871 *fpp = fp; 2872 2873 out: 2874 NFSEXITCODE(error); 2875 return (error); 2876 } 2877 2878 /* 2879 * Called from nfssvc() to update the exports list. Just call 2880 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2881 * in the mount list. 2882 */ 2883 int 2884 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2885 { 2886 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2887 int error = 0; 2888 struct nameidata nd; 2889 fhandle_t fh; 2890 2891 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2892 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2893 nfs_rootfhset = 0; 2894 else if (error == 0) { 2895 if (nfsexargp->fspec == NULL) { 2896 error = EPERM; 2897 goto out; 2898 } 2899 /* 2900 * If fspec != NULL, this is the v4root path. 2901 */ 2902 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2903 nfsexargp->fspec, p); 2904 if ((error = namei(&nd)) != 0) 2905 goto out; 2906 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2907 vrele(nd.ni_vp); 2908 if (!error) { 2909 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2910 NFSBCOPY((caddr_t)&fh, 2911 nfs_rootfh.nfsrvfh_data, 2912 sizeof (fhandle_t)); 2913 nfs_rootfhset = 1; 2914 } 2915 } 2916 2917 out: 2918 NFSEXITCODE(error); 2919 return (error); 2920 } 2921 2922 /* 2923 * This function needs to test to see if the system is near its limit 2924 * for memory allocation via malloc() or mget() and return True iff 2925 * either of these resources are near their limit. 2926 * XXX (For now, this is just a stub.) 2927 */ 2928 int nfsrv_testmalloclimit = 0; 2929 int 2930 nfsrv_mallocmget_limit(void) 2931 { 2932 static int printmesg = 0; 2933 static int testval = 1; 2934 2935 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2936 if ((printmesg++ % 100) == 0) 2937 printf("nfsd: malloc/mget near limit\n"); 2938 return (1); 2939 } 2940 return (0); 2941 } 2942 2943 /* 2944 * BSD specific initialization of a mount point. 2945 */ 2946 void 2947 nfsd_mntinit(void) 2948 { 2949 static int inited = 0; 2950 2951 if (inited) 2952 return; 2953 inited = 1; 2954 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2955 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2956 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2957 nfsv4root_mnt.mnt_export = NULL; 2958 TAILQ_INIT(&nfsv4root_opt); 2959 TAILQ_INIT(&nfsv4root_newopt); 2960 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2961 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2962 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2963 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2964 } 2965 2966 /* 2967 * Get a vnode for a file handle, without checking exports, etc. 2968 */ 2969 struct vnode * 2970 nfsvno_getvp(fhandle_t *fhp) 2971 { 2972 struct mount *mp; 2973 struct vnode *vp; 2974 int error; 2975 2976 mp = vfs_busyfs(&fhp->fh_fsid); 2977 if (mp == NULL) 2978 return (NULL); 2979 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2980 vfs_unbusy(mp); 2981 if (error) 2982 return (NULL); 2983 return (vp); 2984 } 2985 2986 /* 2987 * Do a local VOP_ADVLOCK(). 2988 */ 2989 int 2990 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2991 u_int64_t end, struct thread *td) 2992 { 2993 int error = 0; 2994 struct flock fl; 2995 u_int64_t tlen; 2996 2997 if (nfsrv_dolocallocks == 0) 2998 goto out; 2999 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3000 3001 fl.l_whence = SEEK_SET; 3002 fl.l_type = ftype; 3003 fl.l_start = (off_t)first; 3004 if (end == NFS64BITSSET) { 3005 fl.l_len = 0; 3006 } else { 3007 tlen = end - first; 3008 fl.l_len = (off_t)tlen; 3009 } 3010 /* 3011 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3012 * values for all calls, so that all locks will be held by the 3013 * nfsd server. (The nfsd server handles conflicts between the 3014 * various clients.) 3015 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3016 * bytes, so it can't be put in l_sysid. 3017 */ 3018 if (nfsv4_sysid == 0) 3019 nfsv4_sysid = nlm_acquire_next_sysid(); 3020 fl.l_pid = (pid_t)0; 3021 fl.l_sysid = (int)nfsv4_sysid; 3022 3023 if (ftype == F_UNLCK) 3024 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3025 (F_POSIX | F_REMOTE)); 3026 else 3027 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3028 (F_POSIX | F_REMOTE)); 3029 3030 out: 3031 NFSEXITCODE(error); 3032 return (error); 3033 } 3034 3035 /* 3036 * Check the nfsv4 root exports. 3037 */ 3038 int 3039 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3040 { 3041 struct ucred *credanon; 3042 int exflags, error = 0, numsecflavor, *secflavors, i; 3043 3044 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3045 &credanon, &numsecflavor, &secflavors); 3046 if (error) { 3047 error = NFSERR_PROGUNAVAIL; 3048 goto out; 3049 } 3050 if (credanon != NULL) 3051 crfree(credanon); 3052 for (i = 0; i < numsecflavor; i++) { 3053 if (secflavors[i] == AUTH_SYS) 3054 nd->nd_flag |= ND_EXAUTHSYS; 3055 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3056 nd->nd_flag |= ND_EXGSS; 3057 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3058 nd->nd_flag |= ND_EXGSSINTEGRITY; 3059 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3060 nd->nd_flag |= ND_EXGSSPRIVACY; 3061 } 3062 3063 out: 3064 NFSEXITCODE(error); 3065 return (error); 3066 } 3067 3068 /* 3069 * Nfs server pseudo system call for the nfsd's 3070 */ 3071 /* 3072 * MPSAFE 3073 */ 3074 static int 3075 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3076 { 3077 struct file *fp; 3078 struct nfsd_addsock_args sockarg; 3079 struct nfsd_nfsd_args nfsdarg; 3080 cap_rights_t rights; 3081 int error; 3082 3083 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3084 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3085 if (error) 3086 goto out; 3087 /* 3088 * Since we don't know what rights might be required, 3089 * pretend that we need them all. It is better to be too 3090 * careful than too reckless. 3091 */ 3092 error = fget(td, sockarg.sock, 3093 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3094 if (error != 0) 3095 goto out; 3096 if (fp->f_type != DTYPE_SOCKET) { 3097 fdrop(fp, td); 3098 error = EPERM; 3099 goto out; 3100 } 3101 error = nfsrvd_addsock(fp); 3102 fdrop(fp, td); 3103 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3104 if (uap->argp == NULL) { 3105 error = EINVAL; 3106 goto out; 3107 } 3108 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3109 sizeof (nfsdarg)); 3110 if (error) 3111 goto out; 3112 error = nfsrvd_nfsd(td, &nfsdarg); 3113 } else { 3114 error = nfssvc_srvcall(td, uap, td->td_ucred); 3115 } 3116 3117 out: 3118 NFSEXITCODE(error); 3119 return (error); 3120 } 3121 3122 static int 3123 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3124 { 3125 struct nfsex_args export; 3126 struct file *fp = NULL; 3127 int stablefd, len; 3128 struct nfsd_clid adminrevoke; 3129 struct nfsd_dumplist dumplist; 3130 struct nfsd_dumpclients *dumpclients; 3131 struct nfsd_dumplocklist dumplocklist; 3132 struct nfsd_dumplocks *dumplocks; 3133 struct nameidata nd; 3134 vnode_t vp; 3135 int error = EINVAL, igotlock; 3136 struct proc *procp; 3137 static int suspend_nfsd = 0; 3138 3139 if (uap->flag & NFSSVC_PUBLICFH) { 3140 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3141 sizeof (fhandle_t)); 3142 error = copyin(uap->argp, 3143 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3144 if (!error) 3145 nfs_pubfhset = 1; 3146 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3147 error = copyin(uap->argp,(caddr_t)&export, 3148 sizeof (struct nfsex_args)); 3149 if (!error) 3150 error = nfsrv_v4rootexport(&export, cred, p); 3151 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3152 nfs_pubfhset = 0; 3153 error = 0; 3154 } else if (uap->flag & NFSSVC_STABLERESTART) { 3155 error = copyin(uap->argp, (caddr_t)&stablefd, 3156 sizeof (int)); 3157 if (!error) 3158 error = fp_getfvp(p, stablefd, &fp, &vp); 3159 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3160 error = EBADF; 3161 if (!error && newnfs_numnfsd != 0) 3162 error = EPERM; 3163 if (!error) { 3164 nfsrv_stablefirst.nsf_fp = fp; 3165 nfsrv_setupstable(p); 3166 } 3167 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3168 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3169 sizeof (struct nfsd_clid)); 3170 if (!error) 3171 error = nfsrv_adminrevoke(&adminrevoke, p); 3172 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3173 error = copyin(uap->argp, (caddr_t)&dumplist, 3174 sizeof (struct nfsd_dumplist)); 3175 if (!error && (dumplist.ndl_size < 1 || 3176 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3177 error = EPERM; 3178 if (!error) { 3179 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3180 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3181 M_TEMP, M_WAITOK); 3182 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3183 error = copyout(dumpclients, 3184 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3185 free((caddr_t)dumpclients, M_TEMP); 3186 } 3187 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3188 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3189 sizeof (struct nfsd_dumplocklist)); 3190 if (!error && (dumplocklist.ndllck_size < 1 || 3191 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3192 error = EPERM; 3193 if (!error) 3194 error = nfsrv_lookupfilename(&nd, 3195 dumplocklist.ndllck_fname, p); 3196 if (!error) { 3197 len = sizeof (struct nfsd_dumplocks) * 3198 dumplocklist.ndllck_size; 3199 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3200 M_TEMP, M_WAITOK); 3201 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3202 dumplocklist.ndllck_size, p); 3203 vput(nd.ni_vp); 3204 error = copyout(dumplocks, 3205 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3206 free((caddr_t)dumplocks, M_TEMP); 3207 } 3208 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3209 procp = p->td_proc; 3210 PROC_LOCK(procp); 3211 nfsd_master_pid = procp->p_pid; 3212 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3213 nfsd_master_start = procp->p_stats->p_start; 3214 nfsd_master_proc = procp; 3215 PROC_UNLOCK(procp); 3216 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3217 NFSLOCKV4ROOTMUTEX(); 3218 if (suspend_nfsd == 0) { 3219 /* Lock out all nfsd threads */ 3220 do { 3221 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3222 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3223 } while (igotlock == 0 && suspend_nfsd == 0); 3224 suspend_nfsd = 1; 3225 } 3226 NFSUNLOCKV4ROOTMUTEX(); 3227 error = 0; 3228 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3229 NFSLOCKV4ROOTMUTEX(); 3230 if (suspend_nfsd != 0) { 3231 nfsv4_unlock(&nfsd_suspend_lock, 0); 3232 suspend_nfsd = 0; 3233 } 3234 NFSUNLOCKV4ROOTMUTEX(); 3235 error = 0; 3236 } 3237 3238 NFSEXITCODE(error); 3239 return (error); 3240 } 3241 3242 /* 3243 * Check exports. 3244 * Returns 0 if ok, 1 otherwise. 3245 */ 3246 int 3247 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3248 { 3249 int i; 3250 3251 /* 3252 * This seems odd, but allow the case where the security flavor 3253 * list is empty. This happens when NFSv4 is traversing non-exported 3254 * file systems. Exported file systems should always have a non-empty 3255 * security flavor list. 3256 */ 3257 if (exp->nes_numsecflavor == 0) 3258 return (0); 3259 3260 for (i = 0; i < exp->nes_numsecflavor; i++) { 3261 /* 3262 * The tests for privacy and integrity must be first, 3263 * since ND_GSS is set for everything but AUTH_SYS. 3264 */ 3265 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3266 (nd->nd_flag & ND_GSSPRIVACY)) 3267 return (0); 3268 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3269 (nd->nd_flag & ND_GSSINTEGRITY)) 3270 return (0); 3271 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3272 (nd->nd_flag & ND_GSS)) 3273 return (0); 3274 if (exp->nes_secflavors[i] == AUTH_SYS && 3275 (nd->nd_flag & ND_GSS) == 0) 3276 return (0); 3277 } 3278 return (1); 3279 } 3280 3281 /* 3282 * Calculate a hash value for the fid in a file handle. 3283 */ 3284 uint32_t 3285 nfsrv_hashfh(fhandle_t *fhp) 3286 { 3287 uint32_t hashval; 3288 3289 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3290 return (hashval); 3291 } 3292 3293 /* 3294 * Calculate a hash value for the sessionid. 3295 */ 3296 uint32_t 3297 nfsrv_hashsessionid(uint8_t *sessionid) 3298 { 3299 uint32_t hashval; 3300 3301 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3302 return (hashval); 3303 } 3304 3305 /* 3306 * Signal the userland master nfsd to backup the stable restart file. 3307 */ 3308 void 3309 nfsrv_backupstable(void) 3310 { 3311 struct proc *procp; 3312 3313 if (nfsd_master_proc != NULL) { 3314 procp = pfind(nfsd_master_pid); 3315 /* Try to make sure it is the correct process. */ 3316 if (procp == nfsd_master_proc && 3317 procp->p_stats->p_start.tv_sec == 3318 nfsd_master_start.tv_sec && 3319 procp->p_stats->p_start.tv_usec == 3320 nfsd_master_start.tv_usec && 3321 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3322 kern_psignal(procp, SIGUSR2); 3323 else 3324 nfsd_master_proc = NULL; 3325 3326 if (procp != NULL) 3327 PROC_UNLOCK(procp); 3328 } 3329 } 3330 3331 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3332 3333 /* 3334 * Called once to initialize data structures... 3335 */ 3336 static int 3337 nfsd_modevent(module_t mod, int type, void *data) 3338 { 3339 int error = 0, i; 3340 static int loaded = 0; 3341 3342 switch (type) { 3343 case MOD_LOAD: 3344 if (loaded) 3345 goto out; 3346 newnfs_portinit(); 3347 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3348 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 3349 MTX_DEF); 3350 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 3351 MTX_DEF); 3352 } 3353 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 3354 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 3355 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 3356 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3357 nfsrvd_initcache(); 3358 nfsd_init(); 3359 NFSD_LOCK(); 3360 nfsrvd_init(0); 3361 NFSD_UNLOCK(); 3362 nfsd_mntinit(); 3363 #ifdef VV_DISABLEDELEG 3364 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3365 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3366 #endif 3367 nfsd_call_servertimer = nfsrv_servertimer; 3368 nfsd_call_nfsd = nfssvc_nfsd; 3369 loaded = 1; 3370 break; 3371 3372 case MOD_UNLOAD: 3373 if (newnfs_numnfsd != 0) { 3374 error = EBUSY; 3375 break; 3376 } 3377 3378 #ifdef VV_DISABLEDELEG 3379 vn_deleg_ops.vndeleg_recall = NULL; 3380 vn_deleg_ops.vndeleg_disable = NULL; 3381 #endif 3382 nfsd_call_servertimer = NULL; 3383 nfsd_call_nfsd = NULL; 3384 3385 /* Clean out all NFSv4 state. */ 3386 nfsrv_throwawayallstate(curthread); 3387 3388 /* Clean the NFS server reply cache */ 3389 nfsrvd_cleancache(); 3390 3391 /* Free up the krpc server pool. */ 3392 if (nfsrvd_pool != NULL) 3393 svcpool_destroy(nfsrvd_pool); 3394 3395 /* and get rid of the locks */ 3396 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3397 mtx_destroy(&nfsrchash_table[i].mtx); 3398 mtx_destroy(&nfsrcahash_table[i].mtx); 3399 } 3400 mtx_destroy(&nfsrc_udpmtx); 3401 mtx_destroy(&nfs_v4root_mutex); 3402 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3403 for (i = 0; i < nfsrv_sessionhashsize; i++) 3404 mtx_destroy(&nfssessionhash[i].mtx); 3405 lockdestroy(&nfsv4root_mnt.mnt_explock); 3406 free(nfsclienthash, M_NFSDCLIENT); 3407 free(nfslockhash, M_NFSDLOCKFILE); 3408 free(nfssessionhash, M_NFSDSESSION); 3409 loaded = 0; 3410 break; 3411 default: 3412 error = EOPNOTSUPP; 3413 break; 3414 } 3415 3416 out: 3417 NFSEXITCODE(error); 3418 return (error); 3419 } 3420 static moduledata_t nfsd_mod = { 3421 "nfsd", 3422 nfsd_modevent, 3423 NULL, 3424 }; 3425 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3426 3427 /* So that loader and kldload(2) can find us, wherever we are.. */ 3428 MODULE_VERSION(nfsd, 1); 3429 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3430 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3431 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3432 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3433 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3434 3435