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