1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/capsicum.h> 38 39 /* 40 * Functions that perform the vfs operations required by the routines in 41 * nfsd_serv.c. It is hoped that this change will make the server more 42 * portable. 43 */ 44 45 #include <fs/nfs/nfsport.h> 46 #include <sys/hash.h> 47 #include <sys/sysctl.h> 48 #include <nlm/nlm_prot.h> 49 #include <nlm/nlm.h> 50 51 FEATURE(nfsd, "NFSv4 server"); 52 53 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 54 extern int nfsrv_useacl; 55 extern int newnfs_numnfsd; 56 extern struct mount nfsv4root_mnt; 57 extern struct nfsrv_stablefirst nfsrv_stablefirst; 58 extern void (*nfsd_call_servertimer)(void); 59 extern SVCPOOL *nfsrvd_pool; 60 extern struct nfsv4lock nfsd_suspend_lock; 61 extern struct nfsclienthashhead *nfsclienthash; 62 extern struct nfslockhashhead *nfslockhash; 63 extern struct nfssessionhash *nfssessionhash; 64 extern int nfsrv_sessionhashsize; 65 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 66 NFSDLOCKMUTEX; 67 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 68 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 69 struct mtx nfsrc_udpmtx; 70 struct mtx nfs_v4root_mutex; 71 struct nfsrvfh nfs_rootfh, nfs_pubfh; 72 int nfs_pubfhset = 0, nfs_rootfhset = 0; 73 struct proc *nfsd_master_proc = NULL; 74 int nfsd_debuglevel = 0; 75 static pid_t nfsd_master_pid = (pid_t)-1; 76 static char nfsd_master_comm[MAXCOMLEN + 1]; 77 static struct timeval nfsd_master_start; 78 static uint32_t nfsv4_sysid = 0; 79 80 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 81 struct ucred *); 82 83 int nfsrv_enable_crossmntpt = 1; 84 static int nfs_commit_blks; 85 static int nfs_commit_miss; 86 extern int nfsrv_issuedelegs; 87 extern int nfsrv_dolocallocks; 88 extern int nfsd_enable_stringtouid; 89 90 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "NFS server"); 91 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 92 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 93 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 94 0, ""); 95 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 96 0, ""); 97 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 98 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 99 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 100 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 101 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 102 0, "Debug level for NFS server"); 103 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 104 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 105 106 #define MAX_REORDERED_RPC 16 107 #define NUM_HEURISTIC 1031 108 #define NHUSE_INIT 64 109 #define NHUSE_INC 16 110 #define NHUSE_MAX 2048 111 112 static struct nfsheur { 113 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 114 off_t nh_nextoff; /* next offset for sequential detection */ 115 int nh_use; /* use count for selection */ 116 int nh_seqcount; /* heuristic */ 117 } nfsheur[NUM_HEURISTIC]; 118 119 120 /* 121 * Heuristic to detect sequential operation. 122 */ 123 static struct nfsheur * 124 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 125 { 126 struct nfsheur *nh; 127 int hi, try; 128 129 /* Locate best candidate. */ 130 try = 32; 131 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 132 nh = &nfsheur[hi]; 133 while (try--) { 134 if (nfsheur[hi].nh_vp == vp) { 135 nh = &nfsheur[hi]; 136 break; 137 } 138 if (nfsheur[hi].nh_use > 0) 139 --nfsheur[hi].nh_use; 140 hi = (hi + 1) % NUM_HEURISTIC; 141 if (nfsheur[hi].nh_use < nh->nh_use) 142 nh = &nfsheur[hi]; 143 } 144 145 /* Initialize hint if this is a new file. */ 146 if (nh->nh_vp != vp) { 147 nh->nh_vp = vp; 148 nh->nh_nextoff = uio->uio_offset; 149 nh->nh_use = NHUSE_INIT; 150 if (uio->uio_offset == 0) 151 nh->nh_seqcount = 4; 152 else 153 nh->nh_seqcount = 1; 154 } 155 156 /* Calculate heuristic. */ 157 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 158 uio->uio_offset == nh->nh_nextoff) { 159 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 160 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 161 if (nh->nh_seqcount > IO_SEQMAX) 162 nh->nh_seqcount = IO_SEQMAX; 163 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 164 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 165 /* Probably a reordered RPC, leave seqcount alone. */ 166 } else if (nh->nh_seqcount > 1) { 167 nh->nh_seqcount /= 2; 168 } else { 169 nh->nh_seqcount = 0; 170 } 171 nh->nh_use += NHUSE_INC; 172 if (nh->nh_use > NHUSE_MAX) 173 nh->nh_use = NHUSE_MAX; 174 return (nh); 175 } 176 177 /* 178 * Get attributes into nfsvattr structure. 179 */ 180 int 181 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 182 struct thread *p, int vpislocked) 183 { 184 int error, lockedit = 0; 185 186 if (vpislocked == 0) { 187 /* 188 * When vpislocked == 0, the vnode is either exclusively 189 * locked by this thread or not locked by this thread. 190 * As such, shared lock it, if not exclusively locked. 191 */ 192 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 193 lockedit = 1; 194 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 195 } 196 } 197 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 198 if (lockedit != 0) 199 NFSVOPUNLOCK(vp, 0); 200 201 NFSEXITCODE(error); 202 return (error); 203 } 204 205 /* 206 * Get a file handle for a vnode. 207 */ 208 int 209 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 210 { 211 int error; 212 213 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 214 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 215 error = VOP_VPTOFH(vp, &fhp->fh_fid); 216 217 NFSEXITCODE(error); 218 return (error); 219 } 220 221 /* 222 * Perform access checking for vnodes obtained from file handles that would 223 * refer to files already opened by a Unix client. You cannot just use 224 * vn_writechk() and VOP_ACCESSX() for two reasons. 225 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 226 * case. 227 * 2 - The owner is to be given access irrespective of mode bits for some 228 * operations, so that processes that chmod after opening a file don't 229 * break. 230 */ 231 int 232 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 233 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 234 u_int32_t *supportedtypep) 235 { 236 struct vattr vattr; 237 int error = 0, getret = 0; 238 239 if (vpislocked == 0) { 240 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 241 error = EPERM; 242 goto out; 243 } 244 } 245 if (accmode & VWRITE) { 246 /* Just vn_writechk() changed to check rdonly */ 247 /* 248 * Disallow write attempts on read-only file systems; 249 * unless the file is a socket or a block or character 250 * device resident on the file system. 251 */ 252 if (NFSVNO_EXRDONLY(exp) || 253 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 254 switch (vp->v_type) { 255 case VREG: 256 case VDIR: 257 case VLNK: 258 error = EROFS; 259 default: 260 break; 261 } 262 } 263 /* 264 * If there's shared text associated with 265 * the inode, try to free it up once. If 266 * we fail, we can't allow writing. 267 */ 268 if (VOP_IS_TEXT(vp) && error == 0) 269 error = ETXTBSY; 270 } 271 if (error != 0) { 272 if (vpislocked == 0) 273 NFSVOPUNLOCK(vp, 0); 274 goto out; 275 } 276 277 /* 278 * Should the override still be applied when ACLs are enabled? 279 */ 280 error = VOP_ACCESSX(vp, accmode, cred, p); 281 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 282 /* 283 * Try again with VEXPLICIT_DENY, to see if the test for 284 * deletion is supported. 285 */ 286 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 287 if (error == 0) { 288 if (vp->v_type == VDIR) { 289 accmode &= ~(VDELETE | VDELETE_CHILD); 290 accmode |= VWRITE; 291 error = VOP_ACCESSX(vp, accmode, cred, p); 292 } else if (supportedtypep != NULL) { 293 *supportedtypep &= ~NFSACCESS_DELETE; 294 } 295 } 296 } 297 298 /* 299 * Allow certain operations for the owner (reads and writes 300 * on files that are already open). 301 */ 302 if (override != NFSACCCHK_NOOVERRIDE && 303 (error == EPERM || error == EACCES)) { 304 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 305 error = 0; 306 else if (override & NFSACCCHK_ALLOWOWNER) { 307 getret = VOP_GETATTR(vp, &vattr, cred); 308 if (getret == 0 && cred->cr_uid == vattr.va_uid) 309 error = 0; 310 } 311 } 312 if (vpislocked == 0) 313 NFSVOPUNLOCK(vp, 0); 314 315 out: 316 NFSEXITCODE(error); 317 return (error); 318 } 319 320 /* 321 * Set attribute(s) vnop. 322 */ 323 int 324 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 325 struct thread *p, struct nfsexstuff *exp) 326 { 327 int error; 328 329 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 330 NFSEXITCODE(error); 331 return (error); 332 } 333 334 /* 335 * Set up nameidata for a lookup() call and do it. 336 */ 337 int 338 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 339 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 340 struct vnode **retdirp) 341 { 342 struct componentname *cnp = &ndp->ni_cnd; 343 int i; 344 struct iovec aiov; 345 struct uio auio; 346 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 347 int error = 0, crossmnt; 348 char *cp; 349 350 *retdirp = NULL; 351 cnp->cn_nameptr = cnp->cn_pnbuf; 352 ndp->ni_strictrelative = 0; 353 /* 354 * Extract and set starting directory. 355 */ 356 if (dp->v_type != VDIR) { 357 if (islocked) 358 vput(dp); 359 else 360 vrele(dp); 361 nfsvno_relpathbuf(ndp); 362 error = ENOTDIR; 363 goto out1; 364 } 365 if (islocked) 366 NFSVOPUNLOCK(dp, 0); 367 VREF(dp); 368 *retdirp = dp; 369 if (NFSVNO_EXRDONLY(exp)) 370 cnp->cn_flags |= RDONLY; 371 ndp->ni_segflg = UIO_SYSSPACE; 372 crossmnt = 1; 373 374 if (nd->nd_flag & ND_PUBLOOKUP) { 375 ndp->ni_loopcnt = 0; 376 if (cnp->cn_pnbuf[0] == '/') { 377 vrele(dp); 378 /* 379 * Check for degenerate pathnames here, since lookup() 380 * panics on them. 381 */ 382 for (i = 1; i < ndp->ni_pathlen; i++) 383 if (cnp->cn_pnbuf[i] != '/') 384 break; 385 if (i == ndp->ni_pathlen) { 386 error = NFSERR_ACCES; 387 goto out; 388 } 389 dp = rootvnode; 390 VREF(dp); 391 } 392 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 393 (nd->nd_flag & ND_NFSV4) == 0) { 394 /* 395 * Only cross mount points for NFSv4 when doing a 396 * mount while traversing the file system above 397 * the mount point, unless nfsrv_enable_crossmntpt is set. 398 */ 399 cnp->cn_flags |= NOCROSSMOUNT; 400 crossmnt = 0; 401 } 402 403 /* 404 * Initialize for scan, set ni_startdir and bump ref on dp again 405 * because lookup() will dereference ni_startdir. 406 */ 407 408 cnp->cn_thread = p; 409 ndp->ni_startdir = dp; 410 ndp->ni_rootdir = rootvnode; 411 ndp->ni_topdir = NULL; 412 413 if (!lockleaf) 414 cnp->cn_flags |= LOCKLEAF; 415 for (;;) { 416 cnp->cn_nameptr = cnp->cn_pnbuf; 417 /* 418 * Call lookup() to do the real work. If an error occurs, 419 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 420 * we do not have to dereference anything before returning. 421 * In either case ni_startdir will be dereferenced and NULLed 422 * out. 423 */ 424 error = lookup(ndp); 425 if (error) 426 break; 427 428 /* 429 * Check for encountering a symbolic link. Trivial 430 * termination occurs if no symlink encountered. 431 */ 432 if ((cnp->cn_flags & ISSYMLINK) == 0) { 433 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 434 nfsvno_relpathbuf(ndp); 435 if (ndp->ni_vp && !lockleaf) 436 NFSVOPUNLOCK(ndp->ni_vp, 0); 437 break; 438 } 439 440 /* 441 * Validate symlink 442 */ 443 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 444 NFSVOPUNLOCK(ndp->ni_dvp, 0); 445 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 446 error = EINVAL; 447 goto badlink2; 448 } 449 450 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 451 error = ELOOP; 452 goto badlink2; 453 } 454 if (ndp->ni_pathlen > 1) 455 cp = uma_zalloc(namei_zone, M_WAITOK); 456 else 457 cp = cnp->cn_pnbuf; 458 aiov.iov_base = cp; 459 aiov.iov_len = MAXPATHLEN; 460 auio.uio_iov = &aiov; 461 auio.uio_iovcnt = 1; 462 auio.uio_offset = 0; 463 auio.uio_rw = UIO_READ; 464 auio.uio_segflg = UIO_SYSSPACE; 465 auio.uio_td = NULL; 466 auio.uio_resid = MAXPATHLEN; 467 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 468 if (error) { 469 badlink1: 470 if (ndp->ni_pathlen > 1) 471 uma_zfree(namei_zone, cp); 472 badlink2: 473 vrele(ndp->ni_dvp); 474 vput(ndp->ni_vp); 475 break; 476 } 477 linklen = MAXPATHLEN - auio.uio_resid; 478 if (linklen == 0) { 479 error = ENOENT; 480 goto badlink1; 481 } 482 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 483 error = ENAMETOOLONG; 484 goto badlink1; 485 } 486 487 /* 488 * Adjust or replace path 489 */ 490 if (ndp->ni_pathlen > 1) { 491 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 492 uma_zfree(namei_zone, cnp->cn_pnbuf); 493 cnp->cn_pnbuf = cp; 494 } else 495 cnp->cn_pnbuf[linklen] = '\0'; 496 ndp->ni_pathlen += linklen; 497 498 /* 499 * Cleanup refs for next loop and check if root directory 500 * should replace current directory. Normally ni_dvp 501 * becomes the new base directory and is cleaned up when 502 * we loop. Explicitly null pointers after invalidation 503 * to clarify operation. 504 */ 505 vput(ndp->ni_vp); 506 ndp->ni_vp = NULL; 507 508 if (cnp->cn_pnbuf[0] == '/') { 509 vrele(ndp->ni_dvp); 510 ndp->ni_dvp = ndp->ni_rootdir; 511 VREF(ndp->ni_dvp); 512 } 513 ndp->ni_startdir = ndp->ni_dvp; 514 ndp->ni_dvp = NULL; 515 } 516 if (!lockleaf) 517 cnp->cn_flags &= ~LOCKLEAF; 518 519 out: 520 if (error) { 521 nfsvno_relpathbuf(ndp); 522 ndp->ni_vp = NULL; 523 ndp->ni_dvp = NULL; 524 ndp->ni_startdir = NULL; 525 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 526 ndp->ni_dvp = NULL; 527 } 528 529 out1: 530 NFSEXITCODE2(error, nd); 531 return (error); 532 } 533 534 /* 535 * Set up a pathname buffer and return a pointer to it and, optionally 536 * set a hash pointer. 537 */ 538 void 539 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 540 { 541 struct componentname *cnp = &ndp->ni_cnd; 542 543 cnp->cn_flags |= (NOMACCHECK | HASBUF); 544 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 545 if (hashpp != NULL) 546 *hashpp = NULL; 547 *bufpp = cnp->cn_pnbuf; 548 } 549 550 /* 551 * Release the above path buffer, if not released by nfsvno_namei(). 552 */ 553 void 554 nfsvno_relpathbuf(struct nameidata *ndp) 555 { 556 557 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 558 panic("nfsrelpath"); 559 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 560 ndp->ni_cnd.cn_flags &= ~HASBUF; 561 } 562 563 /* 564 * Readlink vnode op into an mbuf list. 565 */ 566 int 567 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 568 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 569 { 570 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 571 struct iovec *ivp = iv; 572 struct uio io, *uiop = &io; 573 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 574 int i, len, tlen, error = 0; 575 576 len = 0; 577 i = 0; 578 while (len < NFS_MAXPATHLEN) { 579 NFSMGET(mp); 580 MCLGET(mp, M_WAITOK); 581 mp->m_len = M_SIZE(mp); 582 if (len == 0) { 583 mp3 = mp2 = mp; 584 } else { 585 mp2->m_next = mp; 586 mp2 = mp; 587 } 588 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 589 mp->m_len = NFS_MAXPATHLEN - len; 590 len = NFS_MAXPATHLEN; 591 } else { 592 len += mp->m_len; 593 } 594 ivp->iov_base = mtod(mp, caddr_t); 595 ivp->iov_len = mp->m_len; 596 i++; 597 ivp++; 598 } 599 uiop->uio_iov = iv; 600 uiop->uio_iovcnt = i; 601 uiop->uio_offset = 0; 602 uiop->uio_resid = len; 603 uiop->uio_rw = UIO_READ; 604 uiop->uio_segflg = UIO_SYSSPACE; 605 uiop->uio_td = NULL; 606 error = VOP_READLINK(vp, uiop, cred); 607 if (error) { 608 m_freem(mp3); 609 *lenp = 0; 610 goto out; 611 } 612 if (uiop->uio_resid > 0) { 613 len -= uiop->uio_resid; 614 tlen = NFSM_RNDUP(len); 615 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 616 } 617 *lenp = len; 618 *mpp = mp3; 619 *mpendp = mp; 620 621 out: 622 NFSEXITCODE(error); 623 return (error); 624 } 625 626 /* 627 * Read vnode op call into mbuf list. 628 */ 629 int 630 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 631 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 632 { 633 struct mbuf *m; 634 int i; 635 struct iovec *iv; 636 struct iovec *iv2; 637 int error = 0, len, left, siz, tlen, ioflag = 0; 638 struct mbuf *m2 = NULL, *m3; 639 struct uio io, *uiop = &io; 640 struct nfsheur *nh; 641 642 len = left = NFSM_RNDUP(cnt); 643 m3 = NULL; 644 /* 645 * Generate the mbuf list with the uio_iov ref. to it. 646 */ 647 i = 0; 648 while (left > 0) { 649 NFSMGET(m); 650 MCLGET(m, M_WAITOK); 651 m->m_len = 0; 652 siz = min(M_TRAILINGSPACE(m), left); 653 left -= siz; 654 i++; 655 if (m3) 656 m2->m_next = m; 657 else 658 m3 = m; 659 m2 = m; 660 } 661 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 662 M_TEMP, M_WAITOK); 663 uiop->uio_iov = iv2 = iv; 664 m = m3; 665 left = len; 666 i = 0; 667 while (left > 0) { 668 if (m == NULL) 669 panic("nfsvno_read iov"); 670 siz = min(M_TRAILINGSPACE(m), left); 671 if (siz > 0) { 672 iv->iov_base = mtod(m, caddr_t) + m->m_len; 673 iv->iov_len = siz; 674 m->m_len += siz; 675 left -= siz; 676 iv++; 677 i++; 678 } 679 m = m->m_next; 680 } 681 uiop->uio_iovcnt = i; 682 uiop->uio_offset = off; 683 uiop->uio_resid = len; 684 uiop->uio_rw = UIO_READ; 685 uiop->uio_segflg = UIO_SYSSPACE; 686 uiop->uio_td = NULL; 687 nh = nfsrv_sequential_heuristic(uiop, vp); 688 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 689 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 690 FREE((caddr_t)iv2, M_TEMP); 691 if (error) { 692 m_freem(m3); 693 *mpp = NULL; 694 goto out; 695 } 696 nh->nh_nextoff = uiop->uio_offset; 697 tlen = len - uiop->uio_resid; 698 cnt = cnt < tlen ? cnt : tlen; 699 tlen = NFSM_RNDUP(cnt); 700 if (tlen == 0) { 701 m_freem(m3); 702 m3 = NULL; 703 } else if (len != tlen || tlen != cnt) 704 nfsrv_adj(m3, len - tlen, tlen - cnt); 705 *mpp = m3; 706 *mpendp = m2; 707 708 out: 709 NFSEXITCODE(error); 710 return (error); 711 } 712 713 /* 714 * Write vnode op from an mbuf list. 715 */ 716 int 717 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 718 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 719 { 720 struct iovec *ivp; 721 int i, len; 722 struct iovec *iv; 723 int ioflags, error; 724 struct uio io, *uiop = &io; 725 struct nfsheur *nh; 726 727 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 728 M_WAITOK); 729 uiop->uio_iov = iv = ivp; 730 uiop->uio_iovcnt = cnt; 731 i = mtod(mp, caddr_t) + mp->m_len - cp; 732 len = retlen; 733 while (len > 0) { 734 if (mp == NULL) 735 panic("nfsvno_write"); 736 if (i > 0) { 737 i = min(i, len); 738 ivp->iov_base = cp; 739 ivp->iov_len = i; 740 ivp++; 741 len -= i; 742 } 743 mp = mp->m_next; 744 if (mp) { 745 i = mp->m_len; 746 cp = mtod(mp, caddr_t); 747 } 748 } 749 750 if (stable == NFSWRITE_UNSTABLE) 751 ioflags = IO_NODELOCKED; 752 else 753 ioflags = (IO_SYNC | IO_NODELOCKED); 754 uiop->uio_resid = retlen; 755 uiop->uio_rw = UIO_WRITE; 756 uiop->uio_segflg = UIO_SYSSPACE; 757 NFSUIOPROC(uiop, p); 758 uiop->uio_offset = off; 759 nh = nfsrv_sequential_heuristic(uiop, vp); 760 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 761 error = VOP_WRITE(vp, uiop, ioflags, cred); 762 if (error == 0) 763 nh->nh_nextoff = uiop->uio_offset; 764 FREE((caddr_t)iv, M_TEMP); 765 766 NFSEXITCODE(error); 767 return (error); 768 } 769 770 /* 771 * Common code for creating a regular file (plus special files for V2). 772 */ 773 int 774 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 775 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 776 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 777 { 778 u_quad_t tempsize; 779 int error; 780 781 error = nd->nd_repstat; 782 if (!error && ndp->ni_vp == NULL) { 783 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 784 vrele(ndp->ni_startdir); 785 error = VOP_CREATE(ndp->ni_dvp, 786 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 787 vput(ndp->ni_dvp); 788 nfsvno_relpathbuf(ndp); 789 if (!error) { 790 if (*exclusive_flagp) { 791 *exclusive_flagp = 0; 792 NFSVNO_ATTRINIT(nvap); 793 nvap->na_atime.tv_sec = cverf[0]; 794 nvap->na_atime.tv_nsec = cverf[1]; 795 error = VOP_SETATTR(ndp->ni_vp, 796 &nvap->na_vattr, nd->nd_cred); 797 } 798 } 799 /* 800 * NFS V2 Only. nfsrvd_mknod() does this for V3. 801 * (This implies, just get out on an error.) 802 */ 803 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 804 nvap->na_type == VFIFO) { 805 if (nvap->na_type == VCHR && rdev == 0xffffffff) 806 nvap->na_type = VFIFO; 807 if (nvap->na_type != VFIFO && 808 (error = priv_check_cred(nd->nd_cred, 809 PRIV_VFS_MKNOD_DEV, 0))) { 810 vrele(ndp->ni_startdir); 811 nfsvno_relpathbuf(ndp); 812 vput(ndp->ni_dvp); 813 goto out; 814 } 815 nvap->na_rdev = rdev; 816 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 817 &ndp->ni_cnd, &nvap->na_vattr); 818 vput(ndp->ni_dvp); 819 nfsvno_relpathbuf(ndp); 820 vrele(ndp->ni_startdir); 821 if (error) 822 goto out; 823 } else { 824 vrele(ndp->ni_startdir); 825 nfsvno_relpathbuf(ndp); 826 vput(ndp->ni_dvp); 827 error = ENXIO; 828 goto out; 829 } 830 *vpp = ndp->ni_vp; 831 } else { 832 /* 833 * Handle cases where error is already set and/or 834 * the file exists. 835 * 1 - clean up the lookup 836 * 2 - iff !error and na_size set, truncate it 837 */ 838 vrele(ndp->ni_startdir); 839 nfsvno_relpathbuf(ndp); 840 *vpp = ndp->ni_vp; 841 if (ndp->ni_dvp == *vpp) 842 vrele(ndp->ni_dvp); 843 else 844 vput(ndp->ni_dvp); 845 if (!error && nvap->na_size != VNOVAL) { 846 error = nfsvno_accchk(*vpp, VWRITE, 847 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 848 NFSACCCHK_VPISLOCKED, NULL); 849 if (!error) { 850 tempsize = nvap->na_size; 851 NFSVNO_ATTRINIT(nvap); 852 nvap->na_size = tempsize; 853 error = VOP_SETATTR(*vpp, 854 &nvap->na_vattr, nd->nd_cred); 855 } 856 } 857 if (error) 858 vput(*vpp); 859 } 860 861 out: 862 NFSEXITCODE(error); 863 return (error); 864 } 865 866 /* 867 * Do a mknod vnode op. 868 */ 869 int 870 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 871 struct thread *p) 872 { 873 int error = 0; 874 enum vtype vtyp; 875 876 vtyp = nvap->na_type; 877 /* 878 * Iff doesn't exist, create it. 879 */ 880 if (ndp->ni_vp) { 881 vrele(ndp->ni_startdir); 882 nfsvno_relpathbuf(ndp); 883 vput(ndp->ni_dvp); 884 vrele(ndp->ni_vp); 885 error = EEXIST; 886 goto out; 887 } 888 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 889 vrele(ndp->ni_startdir); 890 nfsvno_relpathbuf(ndp); 891 vput(ndp->ni_dvp); 892 error = NFSERR_BADTYPE; 893 goto out; 894 } 895 if (vtyp == VSOCK) { 896 vrele(ndp->ni_startdir); 897 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 898 &ndp->ni_cnd, &nvap->na_vattr); 899 vput(ndp->ni_dvp); 900 nfsvno_relpathbuf(ndp); 901 } else { 902 if (nvap->na_type != VFIFO && 903 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 904 vrele(ndp->ni_startdir); 905 nfsvno_relpathbuf(ndp); 906 vput(ndp->ni_dvp); 907 goto out; 908 } 909 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 910 &ndp->ni_cnd, &nvap->na_vattr); 911 vput(ndp->ni_dvp); 912 nfsvno_relpathbuf(ndp); 913 vrele(ndp->ni_startdir); 914 /* 915 * Since VOP_MKNOD returns the ni_vp, I can't 916 * see any reason to do the lookup. 917 */ 918 } 919 920 out: 921 NFSEXITCODE(error); 922 return (error); 923 } 924 925 /* 926 * Mkdir vnode op. 927 */ 928 int 929 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 930 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 931 { 932 int error = 0; 933 934 if (ndp->ni_vp != NULL) { 935 if (ndp->ni_dvp == ndp->ni_vp) 936 vrele(ndp->ni_dvp); 937 else 938 vput(ndp->ni_dvp); 939 vrele(ndp->ni_vp); 940 nfsvno_relpathbuf(ndp); 941 error = EEXIST; 942 goto out; 943 } 944 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 945 &nvap->na_vattr); 946 vput(ndp->ni_dvp); 947 nfsvno_relpathbuf(ndp); 948 949 out: 950 NFSEXITCODE(error); 951 return (error); 952 } 953 954 /* 955 * symlink vnode op. 956 */ 957 int 958 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 959 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 960 struct nfsexstuff *exp) 961 { 962 int error = 0; 963 964 if (ndp->ni_vp) { 965 vrele(ndp->ni_startdir); 966 nfsvno_relpathbuf(ndp); 967 if (ndp->ni_dvp == ndp->ni_vp) 968 vrele(ndp->ni_dvp); 969 else 970 vput(ndp->ni_dvp); 971 vrele(ndp->ni_vp); 972 error = EEXIST; 973 goto out; 974 } 975 976 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 977 &nvap->na_vattr, pathcp); 978 vput(ndp->ni_dvp); 979 vrele(ndp->ni_startdir); 980 nfsvno_relpathbuf(ndp); 981 /* 982 * Although FreeBSD still had the lookup code in 983 * it for 7/current, there doesn't seem to be any 984 * point, since VOP_SYMLINK() returns the ni_vp. 985 * Just vput it for v2. 986 */ 987 if (!not_v2 && !error) 988 vput(ndp->ni_vp); 989 990 out: 991 NFSEXITCODE(error); 992 return (error); 993 } 994 995 /* 996 * Parse symbolic link arguments. 997 * This function has an ugly side effect. It will MALLOC() an area for 998 * the symlink and set iov_base to point to it, only if it succeeds. 999 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1000 * be FREE'd later. 1001 */ 1002 int 1003 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1004 struct thread *p, char **pathcpp, int *lenp) 1005 { 1006 u_int32_t *tl; 1007 char *pathcp = NULL; 1008 int error = 0, len; 1009 struct nfsv2_sattr *sp; 1010 1011 *pathcpp = NULL; 1012 *lenp = 0; 1013 if ((nd->nd_flag & ND_NFSV3) && 1014 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1015 goto nfsmout; 1016 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1017 len = fxdr_unsigned(int, *tl); 1018 if (len > NFS_MAXPATHLEN || len <= 0) { 1019 error = EBADRPC; 1020 goto nfsmout; 1021 } 1022 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1023 error = nfsrv_mtostr(nd, pathcp, len); 1024 if (error) 1025 goto nfsmout; 1026 if (nd->nd_flag & ND_NFSV2) { 1027 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1028 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1029 } 1030 *pathcpp = pathcp; 1031 *lenp = len; 1032 NFSEXITCODE2(0, nd); 1033 return (0); 1034 nfsmout: 1035 if (pathcp) 1036 free(pathcp, M_TEMP); 1037 NFSEXITCODE2(error, nd); 1038 return (error); 1039 } 1040 1041 /* 1042 * Remove a non-directory object. 1043 */ 1044 int 1045 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1046 struct thread *p, struct nfsexstuff *exp) 1047 { 1048 struct vnode *vp; 1049 int error = 0; 1050 1051 vp = ndp->ni_vp; 1052 if (vp->v_type == VDIR) 1053 error = NFSERR_ISDIR; 1054 else if (is_v4) 1055 error = nfsrv_checkremove(vp, 1, p); 1056 if (!error) 1057 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1058 if (ndp->ni_dvp == vp) 1059 vrele(ndp->ni_dvp); 1060 else 1061 vput(ndp->ni_dvp); 1062 vput(vp); 1063 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1064 nfsvno_relpathbuf(ndp); 1065 NFSEXITCODE(error); 1066 return (error); 1067 } 1068 1069 /* 1070 * Remove a directory. 1071 */ 1072 int 1073 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1074 struct thread *p, struct nfsexstuff *exp) 1075 { 1076 struct vnode *vp; 1077 int error = 0; 1078 1079 vp = ndp->ni_vp; 1080 if (vp->v_type != VDIR) { 1081 error = ENOTDIR; 1082 goto out; 1083 } 1084 /* 1085 * No rmdir "." please. 1086 */ 1087 if (ndp->ni_dvp == vp) { 1088 error = EINVAL; 1089 goto out; 1090 } 1091 /* 1092 * The root of a mounted filesystem cannot be deleted. 1093 */ 1094 if (vp->v_vflag & VV_ROOT) 1095 error = EBUSY; 1096 out: 1097 if (!error) 1098 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1099 if (ndp->ni_dvp == vp) 1100 vrele(ndp->ni_dvp); 1101 else 1102 vput(ndp->ni_dvp); 1103 vput(vp); 1104 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1105 nfsvno_relpathbuf(ndp); 1106 NFSEXITCODE(error); 1107 return (error); 1108 } 1109 1110 /* 1111 * Rename vnode op. 1112 */ 1113 int 1114 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1115 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1116 { 1117 struct vnode *fvp, *tvp, *tdvp; 1118 int error = 0; 1119 1120 fvp = fromndp->ni_vp; 1121 if (ndstat) { 1122 vrele(fromndp->ni_dvp); 1123 vrele(fvp); 1124 error = ndstat; 1125 goto out1; 1126 } 1127 tdvp = tondp->ni_dvp; 1128 tvp = tondp->ni_vp; 1129 if (tvp != NULL) { 1130 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1131 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1132 goto out; 1133 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1134 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1135 goto out; 1136 } 1137 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1138 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1139 goto out; 1140 } 1141 1142 /* 1143 * A rename to '.' or '..' results in a prematurely 1144 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1145 * here. 1146 */ 1147 if ((tondp->ni_cnd.cn_namelen == 1 && 1148 tondp->ni_cnd.cn_nameptr[0] == '.') || 1149 (tondp->ni_cnd.cn_namelen == 2 && 1150 tondp->ni_cnd.cn_nameptr[0] == '.' && 1151 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1152 error = EINVAL; 1153 goto out; 1154 } 1155 } 1156 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1157 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1158 goto out; 1159 } 1160 if (fvp->v_mount != tdvp->v_mount) { 1161 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1162 goto out; 1163 } 1164 if (fvp == tdvp) { 1165 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1166 goto out; 1167 } 1168 if (fvp == tvp) { 1169 /* 1170 * If source and destination are the same, there is nothing to 1171 * do. Set error to -1 to indicate this. 1172 */ 1173 error = -1; 1174 goto out; 1175 } 1176 if (ndflag & ND_NFSV4) { 1177 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1178 error = nfsrv_checkremove(fvp, 0, p); 1179 NFSVOPUNLOCK(fvp, 0); 1180 } else 1181 error = EPERM; 1182 if (tvp && !error) 1183 error = nfsrv_checkremove(tvp, 1, p); 1184 } else { 1185 /* 1186 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1187 * that the NFSv4 client won't be confused by the rename. 1188 * Since nfsd_recalldelegation() can only be called on an 1189 * unlocked vnode at this point and fvp is the file that will 1190 * still exist after the rename, just do fvp. 1191 */ 1192 nfsd_recalldelegation(fvp, p); 1193 } 1194 out: 1195 if (!error) { 1196 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1197 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1198 &tondp->ni_cnd); 1199 } else { 1200 if (tdvp == tvp) 1201 vrele(tdvp); 1202 else 1203 vput(tdvp); 1204 if (tvp) 1205 vput(tvp); 1206 vrele(fromndp->ni_dvp); 1207 vrele(fvp); 1208 if (error == -1) 1209 error = 0; 1210 } 1211 vrele(tondp->ni_startdir); 1212 nfsvno_relpathbuf(tondp); 1213 out1: 1214 vrele(fromndp->ni_startdir); 1215 nfsvno_relpathbuf(fromndp); 1216 NFSEXITCODE(error); 1217 return (error); 1218 } 1219 1220 /* 1221 * Link vnode op. 1222 */ 1223 int 1224 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1225 struct thread *p, struct nfsexstuff *exp) 1226 { 1227 struct vnode *xp; 1228 int error = 0; 1229 1230 xp = ndp->ni_vp; 1231 if (xp != NULL) { 1232 error = EEXIST; 1233 } else { 1234 xp = ndp->ni_dvp; 1235 if (vp->v_mount != xp->v_mount) 1236 error = EXDEV; 1237 } 1238 if (!error) { 1239 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1240 if ((vp->v_iflag & VI_DOOMED) == 0) 1241 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1242 else 1243 error = EPERM; 1244 if (ndp->ni_dvp == vp) 1245 vrele(ndp->ni_dvp); 1246 else 1247 vput(ndp->ni_dvp); 1248 NFSVOPUNLOCK(vp, 0); 1249 } else { 1250 if (ndp->ni_dvp == ndp->ni_vp) 1251 vrele(ndp->ni_dvp); 1252 else 1253 vput(ndp->ni_dvp); 1254 if (ndp->ni_vp) 1255 vrele(ndp->ni_vp); 1256 } 1257 nfsvno_relpathbuf(ndp); 1258 NFSEXITCODE(error); 1259 return (error); 1260 } 1261 1262 /* 1263 * Do the fsync() appropriate for the commit. 1264 */ 1265 int 1266 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1267 struct thread *td) 1268 { 1269 int error = 0; 1270 1271 /* 1272 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1273 * file is done. At this time VOP_FSYNC does not accept offset and 1274 * byte count parameters so call VOP_FSYNC the whole file for now. 1275 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1276 * File systems that do not use the buffer cache (as indicated 1277 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1278 */ 1279 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1280 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1281 /* 1282 * Give up and do the whole thing 1283 */ 1284 if (vp->v_object && 1285 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1286 VM_OBJECT_WLOCK(vp->v_object); 1287 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1288 VM_OBJECT_WUNLOCK(vp->v_object); 1289 } 1290 error = VOP_FSYNC(vp, MNT_WAIT, td); 1291 } else { 1292 /* 1293 * Locate and synchronously write any buffers that fall 1294 * into the requested range. Note: we are assuming that 1295 * f_iosize is a power of 2. 1296 */ 1297 int iosize = vp->v_mount->mnt_stat.f_iosize; 1298 int iomask = iosize - 1; 1299 struct bufobj *bo; 1300 daddr_t lblkno; 1301 1302 /* 1303 * Align to iosize boundry, super-align to page boundry. 1304 */ 1305 if (off & iomask) { 1306 cnt += off & iomask; 1307 off &= ~(u_quad_t)iomask; 1308 } 1309 if (off & PAGE_MASK) { 1310 cnt += off & PAGE_MASK; 1311 off &= ~(u_quad_t)PAGE_MASK; 1312 } 1313 lblkno = off / iosize; 1314 1315 if (vp->v_object && 1316 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1317 VM_OBJECT_WLOCK(vp->v_object); 1318 vm_object_page_clean(vp->v_object, off, off + cnt, 1319 OBJPC_SYNC); 1320 VM_OBJECT_WUNLOCK(vp->v_object); 1321 } 1322 1323 bo = &vp->v_bufobj; 1324 BO_LOCK(bo); 1325 while (cnt > 0) { 1326 struct buf *bp; 1327 1328 /* 1329 * If we have a buffer and it is marked B_DELWRI we 1330 * have to lock and write it. Otherwise the prior 1331 * write is assumed to have already been committed. 1332 * 1333 * gbincore() can return invalid buffers now so we 1334 * have to check that bit as well (though B_DELWRI 1335 * should not be set if B_INVAL is set there could be 1336 * a race here since we haven't locked the buffer). 1337 */ 1338 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1339 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1340 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1341 BO_LOCK(bo); 1342 continue; /* retry */ 1343 } 1344 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1345 B_DELWRI) { 1346 bremfree(bp); 1347 bp->b_flags &= ~B_ASYNC; 1348 bwrite(bp); 1349 ++nfs_commit_miss; 1350 } else 1351 BUF_UNLOCK(bp); 1352 BO_LOCK(bo); 1353 } 1354 ++nfs_commit_blks; 1355 if (cnt < iosize) 1356 break; 1357 cnt -= iosize; 1358 ++lblkno; 1359 } 1360 BO_UNLOCK(bo); 1361 } 1362 NFSEXITCODE(error); 1363 return (error); 1364 } 1365 1366 /* 1367 * Statfs vnode op. 1368 */ 1369 int 1370 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1371 { 1372 int error; 1373 1374 error = VFS_STATFS(vp->v_mount, sf); 1375 if (error == 0) { 1376 /* 1377 * Since NFS handles these values as unsigned on the 1378 * wire, there is no way to represent negative values, 1379 * so set them to 0. Without this, they will appear 1380 * to be very large positive values for clients like 1381 * Solaris10. 1382 */ 1383 if (sf->f_bavail < 0) 1384 sf->f_bavail = 0; 1385 if (sf->f_ffree < 0) 1386 sf->f_ffree = 0; 1387 } 1388 NFSEXITCODE(error); 1389 return (error); 1390 } 1391 1392 /* 1393 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1394 * must handle nfsrv_opencheck() calls after any other access checks. 1395 */ 1396 void 1397 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1398 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1399 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1400 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1401 struct nfsexstuff *exp, struct vnode **vpp) 1402 { 1403 struct vnode *vp = NULL; 1404 u_quad_t tempsize; 1405 struct nfsexstuff nes; 1406 1407 if (ndp->ni_vp == NULL) 1408 nd->nd_repstat = nfsrv_opencheck(clientid, 1409 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1410 if (!nd->nd_repstat) { 1411 if (ndp->ni_vp == NULL) { 1412 vrele(ndp->ni_startdir); 1413 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1414 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1415 vput(ndp->ni_dvp); 1416 nfsvno_relpathbuf(ndp); 1417 if (!nd->nd_repstat) { 1418 if (*exclusive_flagp) { 1419 *exclusive_flagp = 0; 1420 NFSVNO_ATTRINIT(nvap); 1421 nvap->na_atime.tv_sec = cverf[0]; 1422 nvap->na_atime.tv_nsec = cverf[1]; 1423 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1424 &nvap->na_vattr, cred); 1425 } else { 1426 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1427 aclp, p, attrbitp, exp); 1428 } 1429 } 1430 vp = ndp->ni_vp; 1431 } else { 1432 if (ndp->ni_startdir) 1433 vrele(ndp->ni_startdir); 1434 nfsvno_relpathbuf(ndp); 1435 vp = ndp->ni_vp; 1436 if (create == NFSV4OPEN_CREATE) { 1437 if (ndp->ni_dvp == vp) 1438 vrele(ndp->ni_dvp); 1439 else 1440 vput(ndp->ni_dvp); 1441 } 1442 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1443 if (ndp->ni_cnd.cn_flags & RDONLY) 1444 NFSVNO_SETEXRDONLY(&nes); 1445 else 1446 NFSVNO_EXINIT(&nes); 1447 nd->nd_repstat = nfsvno_accchk(vp, 1448 VWRITE, cred, &nes, p, 1449 NFSACCCHK_NOOVERRIDE, 1450 NFSACCCHK_VPISLOCKED, NULL); 1451 nd->nd_repstat = nfsrv_opencheck(clientid, 1452 stateidp, stp, vp, nd, p, nd->nd_repstat); 1453 if (!nd->nd_repstat) { 1454 tempsize = nvap->na_size; 1455 NFSVNO_ATTRINIT(nvap); 1456 nvap->na_size = tempsize; 1457 nd->nd_repstat = VOP_SETATTR(vp, 1458 &nvap->na_vattr, cred); 1459 } 1460 } else if (vp->v_type == VREG) { 1461 nd->nd_repstat = nfsrv_opencheck(clientid, 1462 stateidp, stp, vp, nd, p, nd->nd_repstat); 1463 } 1464 } 1465 } else { 1466 if (ndp->ni_cnd.cn_flags & HASBUF) 1467 nfsvno_relpathbuf(ndp); 1468 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1469 vrele(ndp->ni_startdir); 1470 if (ndp->ni_dvp == ndp->ni_vp) 1471 vrele(ndp->ni_dvp); 1472 else 1473 vput(ndp->ni_dvp); 1474 if (ndp->ni_vp) 1475 vput(ndp->ni_vp); 1476 } 1477 } 1478 *vpp = vp; 1479 1480 NFSEXITCODE2(0, nd); 1481 } 1482 1483 /* 1484 * Updates the file rev and sets the mtime and ctime 1485 * to the current clock time, returning the va_filerev and va_Xtime 1486 * values. 1487 * Return ESTALE to indicate the vnode is VI_DOOMED. 1488 */ 1489 int 1490 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1491 struct ucred *cred, struct thread *p) 1492 { 1493 struct vattr va; 1494 1495 VATTR_NULL(&va); 1496 vfs_timestamp(&va.va_mtime); 1497 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1498 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1499 if ((vp->v_iflag & VI_DOOMED) != 0) 1500 return (ESTALE); 1501 } 1502 (void) VOP_SETATTR(vp, &va, cred); 1503 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1504 return (0); 1505 } 1506 1507 /* 1508 * Glue routine to nfsv4_fillattr(). 1509 */ 1510 int 1511 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1512 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1513 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1514 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1515 { 1516 int error; 1517 1518 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1519 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1520 mounted_on_fileno); 1521 NFSEXITCODE2(0, nd); 1522 return (error); 1523 } 1524 1525 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1526 /* 1527 * nfs readdir service 1528 * - mallocs what it thinks is enough to read 1529 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1530 * - calls VOP_READDIR() 1531 * - loops around building the reply 1532 * if the output generated exceeds count break out of loop 1533 * The NFSM_CLGET macro is used here so that the reply will be packed 1534 * tightly in mbuf clusters. 1535 * - it trims out records with d_fileno == 0 1536 * this doesn't matter for Unix clients, but they might confuse clients 1537 * for other os'. 1538 * - it trims out records with d_type == DT_WHT 1539 * these cannot be seen through NFS (unless we extend the protocol) 1540 * The alternate call nfsrvd_readdirplus() does lookups as well. 1541 * PS: The NFS protocol spec. does not clarify what the "count" byte 1542 * argument is a count of.. just name strings and file id's or the 1543 * entire reply rpc or ... 1544 * I tried just file name and id sizes and it confused the Sun client, 1545 * so I am using the full rpc size now. The "paranoia.." comment refers 1546 * to including the status longwords that are not a part of the dir. 1547 * "entry" structures, but are in the rpc. 1548 */ 1549 int 1550 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1551 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1552 { 1553 struct dirent *dp; 1554 u_int32_t *tl; 1555 int dirlen; 1556 char *cpos, *cend, *rbuf; 1557 struct nfsvattr at; 1558 int nlen, error = 0, getret = 1; 1559 int siz, cnt, fullsiz, eofflag, ncookies; 1560 u_int64_t off, toff, verf; 1561 u_long *cookies = NULL, *cookiep; 1562 struct uio io; 1563 struct iovec iv; 1564 int is_ufs; 1565 1566 if (nd->nd_repstat) { 1567 nfsrv_postopattr(nd, getret, &at); 1568 goto out; 1569 } 1570 if (nd->nd_flag & ND_NFSV2) { 1571 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1572 off = fxdr_unsigned(u_quad_t, *tl++); 1573 } else { 1574 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1575 off = fxdr_hyper(tl); 1576 tl += 2; 1577 verf = fxdr_hyper(tl); 1578 tl += 2; 1579 } 1580 toff = off; 1581 cnt = fxdr_unsigned(int, *tl); 1582 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1583 cnt = NFS_SRVMAXDATA(nd); 1584 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1585 fullsiz = siz; 1586 if (nd->nd_flag & ND_NFSV3) { 1587 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1588 p, 1); 1589 #if 0 1590 /* 1591 * va_filerev is not sufficient as a cookie verifier, 1592 * since it is not supposed to change when entries are 1593 * removed/added unless that offset cookies returned to 1594 * the client are no longer valid. 1595 */ 1596 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1597 nd->nd_repstat = NFSERR_BAD_COOKIE; 1598 #endif 1599 } 1600 if (!nd->nd_repstat && vp->v_type != VDIR) 1601 nd->nd_repstat = NFSERR_NOTDIR; 1602 if (nd->nd_repstat == 0 && cnt == 0) { 1603 if (nd->nd_flag & ND_NFSV2) 1604 /* NFSv2 does not have NFSERR_TOOSMALL */ 1605 nd->nd_repstat = EPERM; 1606 else 1607 nd->nd_repstat = NFSERR_TOOSMALL; 1608 } 1609 if (!nd->nd_repstat) 1610 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1611 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1612 NFSACCCHK_VPISLOCKED, NULL); 1613 if (nd->nd_repstat) { 1614 vput(vp); 1615 if (nd->nd_flag & ND_NFSV3) 1616 nfsrv_postopattr(nd, getret, &at); 1617 goto out; 1618 } 1619 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1620 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1621 again: 1622 eofflag = 0; 1623 if (cookies) { 1624 free((caddr_t)cookies, M_TEMP); 1625 cookies = NULL; 1626 } 1627 1628 iv.iov_base = rbuf; 1629 iv.iov_len = siz; 1630 io.uio_iov = &iv; 1631 io.uio_iovcnt = 1; 1632 io.uio_offset = (off_t)off; 1633 io.uio_resid = siz; 1634 io.uio_segflg = UIO_SYSSPACE; 1635 io.uio_rw = UIO_READ; 1636 io.uio_td = NULL; 1637 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1638 &cookies); 1639 off = (u_int64_t)io.uio_offset; 1640 if (io.uio_resid) 1641 siz -= io.uio_resid; 1642 1643 if (!cookies && !nd->nd_repstat) 1644 nd->nd_repstat = NFSERR_PERM; 1645 if (nd->nd_flag & ND_NFSV3) { 1646 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1647 if (!nd->nd_repstat) 1648 nd->nd_repstat = getret; 1649 } 1650 1651 /* 1652 * Handles the failed cases. nd->nd_repstat == 0 past here. 1653 */ 1654 if (nd->nd_repstat) { 1655 vput(vp); 1656 free((caddr_t)rbuf, M_TEMP); 1657 if (cookies) 1658 free((caddr_t)cookies, M_TEMP); 1659 if (nd->nd_flag & ND_NFSV3) 1660 nfsrv_postopattr(nd, getret, &at); 1661 goto out; 1662 } 1663 /* 1664 * If nothing read, return eof 1665 * rpc reply 1666 */ 1667 if (siz == 0) { 1668 vput(vp); 1669 if (nd->nd_flag & ND_NFSV2) { 1670 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1671 } else { 1672 nfsrv_postopattr(nd, getret, &at); 1673 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1674 txdr_hyper(at.na_filerev, tl); 1675 tl += 2; 1676 } 1677 *tl++ = newnfs_false; 1678 *tl = newnfs_true; 1679 FREE((caddr_t)rbuf, M_TEMP); 1680 FREE((caddr_t)cookies, M_TEMP); 1681 goto out; 1682 } 1683 1684 /* 1685 * Check for degenerate cases of nothing useful read. 1686 * If so go try again 1687 */ 1688 cpos = rbuf; 1689 cend = rbuf + siz; 1690 dp = (struct dirent *)cpos; 1691 cookiep = cookies; 1692 1693 /* 1694 * For some reason FreeBSD's ufs_readdir() chooses to back the 1695 * directory offset up to a block boundary, so it is necessary to 1696 * skip over the records that precede the requested offset. This 1697 * requires the assumption that file offset cookies monotonically 1698 * increase. 1699 */ 1700 while (cpos < cend && ncookies > 0 && 1701 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1702 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 1703 cpos += dp->d_reclen; 1704 dp = (struct dirent *)cpos; 1705 cookiep++; 1706 ncookies--; 1707 } 1708 if (cpos >= cend || ncookies == 0) { 1709 siz = fullsiz; 1710 toff = off; 1711 goto again; 1712 } 1713 vput(vp); 1714 1715 /* 1716 * dirlen is the size of the reply, including all XDR and must 1717 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1718 * if the XDR should be included in "count", but to be safe, we do. 1719 * (Include the two booleans at the end of the reply in dirlen now.) 1720 */ 1721 if (nd->nd_flag & ND_NFSV3) { 1722 nfsrv_postopattr(nd, getret, &at); 1723 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1724 txdr_hyper(at.na_filerev, tl); 1725 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1726 } else { 1727 dirlen = 2 * NFSX_UNSIGNED; 1728 } 1729 1730 /* Loop through the records and build reply */ 1731 while (cpos < cend && ncookies > 0) { 1732 nlen = dp->d_namlen; 1733 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1734 nlen <= NFS_MAXNAMLEN) { 1735 if (nd->nd_flag & ND_NFSV3) 1736 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1737 else 1738 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1739 if (dirlen > cnt) { 1740 eofflag = 0; 1741 break; 1742 } 1743 1744 /* 1745 * Build the directory record xdr from 1746 * the dirent entry. 1747 */ 1748 if (nd->nd_flag & ND_NFSV3) { 1749 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1750 *tl++ = newnfs_true; 1751 *tl++ = 0; 1752 } else { 1753 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1754 *tl++ = newnfs_true; 1755 } 1756 *tl = txdr_unsigned(dp->d_fileno); 1757 (void) nfsm_strtom(nd, dp->d_name, nlen); 1758 if (nd->nd_flag & ND_NFSV3) { 1759 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1760 *tl++ = 0; 1761 } else 1762 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1763 *tl = txdr_unsigned(*cookiep); 1764 } 1765 cpos += dp->d_reclen; 1766 dp = (struct dirent *)cpos; 1767 cookiep++; 1768 ncookies--; 1769 } 1770 if (cpos < cend) 1771 eofflag = 0; 1772 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1773 *tl++ = newnfs_false; 1774 if (eofflag) 1775 *tl = newnfs_true; 1776 else 1777 *tl = newnfs_false; 1778 FREE((caddr_t)rbuf, M_TEMP); 1779 FREE((caddr_t)cookies, M_TEMP); 1780 1781 out: 1782 NFSEXITCODE2(0, nd); 1783 return (0); 1784 nfsmout: 1785 vput(vp); 1786 NFSEXITCODE2(error, nd); 1787 return (error); 1788 } 1789 1790 /* 1791 * Readdirplus for V3 and Readdir for V4. 1792 */ 1793 int 1794 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1795 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1796 { 1797 struct dirent *dp; 1798 u_int32_t *tl; 1799 int dirlen; 1800 char *cpos, *cend, *rbuf; 1801 struct vnode *nvp; 1802 fhandle_t nfh; 1803 struct nfsvattr nva, at, *nvap = &nva; 1804 struct mbuf *mb0, *mb1; 1805 struct nfsreferral *refp; 1806 int nlen, r, error = 0, getret = 1, usevget = 1; 1807 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1808 caddr_t bpos0, bpos1; 1809 u_int64_t off, toff, verf; 1810 u_long *cookies = NULL, *cookiep; 1811 nfsattrbit_t attrbits, rderrbits, savbits; 1812 struct uio io; 1813 struct iovec iv; 1814 struct componentname cn; 1815 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 1816 struct mount *mp, *new_mp; 1817 uint64_t mounted_on_fileno; 1818 1819 if (nd->nd_repstat) { 1820 nfsrv_postopattr(nd, getret, &at); 1821 goto out; 1822 } 1823 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1824 off = fxdr_hyper(tl); 1825 toff = off; 1826 tl += 2; 1827 verf = fxdr_hyper(tl); 1828 tl += 2; 1829 siz = fxdr_unsigned(int, *tl++); 1830 cnt = fxdr_unsigned(int, *tl); 1831 1832 /* 1833 * Use the server's maximum data transfer size as the upper bound 1834 * on reply datalen. 1835 */ 1836 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1837 cnt = NFS_SRVMAXDATA(nd); 1838 1839 /* 1840 * siz is a "hint" of how much directory information (name, fileid, 1841 * cookie) should be in the reply. At least one client "hints" 0, 1842 * so I set it to cnt for that case. I also round it up to the 1843 * next multiple of DIRBLKSIZ. 1844 */ 1845 if (siz <= 0) 1846 siz = cnt; 1847 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1848 1849 if (nd->nd_flag & ND_NFSV4) { 1850 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1851 if (error) 1852 goto nfsmout; 1853 NFSSET_ATTRBIT(&savbits, &attrbits); 1854 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1855 NFSZERO_ATTRBIT(&rderrbits); 1856 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1857 } else { 1858 NFSZERO_ATTRBIT(&attrbits); 1859 } 1860 fullsiz = siz; 1861 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1862 if (!nd->nd_repstat) { 1863 if (off && verf != at.na_filerev) { 1864 /* 1865 * va_filerev is not sufficient as a cookie verifier, 1866 * since it is not supposed to change when entries are 1867 * removed/added unless that offset cookies returned to 1868 * the client are no longer valid. 1869 */ 1870 #if 0 1871 if (nd->nd_flag & ND_NFSV4) { 1872 nd->nd_repstat = NFSERR_NOTSAME; 1873 } else { 1874 nd->nd_repstat = NFSERR_BAD_COOKIE; 1875 } 1876 #endif 1877 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1878 nd->nd_repstat = NFSERR_BAD_COOKIE; 1879 } 1880 } 1881 if (!nd->nd_repstat && vp->v_type != VDIR) 1882 nd->nd_repstat = NFSERR_NOTDIR; 1883 if (!nd->nd_repstat && cnt == 0) 1884 nd->nd_repstat = NFSERR_TOOSMALL; 1885 if (!nd->nd_repstat) 1886 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1887 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1888 NFSACCCHK_VPISLOCKED, NULL); 1889 if (nd->nd_repstat) { 1890 vput(vp); 1891 if (nd->nd_flag & ND_NFSV3) 1892 nfsrv_postopattr(nd, getret, &at); 1893 goto out; 1894 } 1895 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1896 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 1897 1898 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1899 again: 1900 eofflag = 0; 1901 if (cookies) { 1902 free((caddr_t)cookies, M_TEMP); 1903 cookies = NULL; 1904 } 1905 1906 iv.iov_base = rbuf; 1907 iv.iov_len = siz; 1908 io.uio_iov = &iv; 1909 io.uio_iovcnt = 1; 1910 io.uio_offset = (off_t)off; 1911 io.uio_resid = siz; 1912 io.uio_segflg = UIO_SYSSPACE; 1913 io.uio_rw = UIO_READ; 1914 io.uio_td = NULL; 1915 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1916 &cookies); 1917 off = (u_int64_t)io.uio_offset; 1918 if (io.uio_resid) 1919 siz -= io.uio_resid; 1920 1921 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1922 1923 if (!cookies && !nd->nd_repstat) 1924 nd->nd_repstat = NFSERR_PERM; 1925 if (!nd->nd_repstat) 1926 nd->nd_repstat = getret; 1927 if (nd->nd_repstat) { 1928 vput(vp); 1929 if (cookies) 1930 free((caddr_t)cookies, M_TEMP); 1931 free((caddr_t)rbuf, M_TEMP); 1932 if (nd->nd_flag & ND_NFSV3) 1933 nfsrv_postopattr(nd, getret, &at); 1934 goto out; 1935 } 1936 /* 1937 * If nothing read, return eof 1938 * rpc reply 1939 */ 1940 if (siz == 0) { 1941 vput(vp); 1942 if (nd->nd_flag & ND_NFSV3) 1943 nfsrv_postopattr(nd, getret, &at); 1944 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1945 txdr_hyper(at.na_filerev, tl); 1946 tl += 2; 1947 *tl++ = newnfs_false; 1948 *tl = newnfs_true; 1949 free((caddr_t)cookies, M_TEMP); 1950 free((caddr_t)rbuf, M_TEMP); 1951 goto out; 1952 } 1953 1954 /* 1955 * Check for degenerate cases of nothing useful read. 1956 * If so go try again 1957 */ 1958 cpos = rbuf; 1959 cend = rbuf + siz; 1960 dp = (struct dirent *)cpos; 1961 cookiep = cookies; 1962 1963 /* 1964 * For some reason FreeBSD's ufs_readdir() chooses to back the 1965 * directory offset up to a block boundary, so it is necessary to 1966 * skip over the records that precede the requested offset. This 1967 * requires the assumption that file offset cookies monotonically 1968 * increase. 1969 */ 1970 while (cpos < cend && ncookies > 0 && 1971 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1972 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 1973 ((nd->nd_flag & ND_NFSV4) && 1974 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1975 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1976 cpos += dp->d_reclen; 1977 dp = (struct dirent *)cpos; 1978 cookiep++; 1979 ncookies--; 1980 } 1981 if (cpos >= cend || ncookies == 0) { 1982 siz = fullsiz; 1983 toff = off; 1984 goto again; 1985 } 1986 1987 /* 1988 * Busy the file system so that the mount point won't go away 1989 * and, as such, VFS_VGET() can be used safely. 1990 */ 1991 mp = vp->v_mount; 1992 vfs_ref(mp); 1993 NFSVOPUNLOCK(vp, 0); 1994 nd->nd_repstat = vfs_busy(mp, 0); 1995 vfs_rel(mp); 1996 if (nd->nd_repstat != 0) { 1997 vrele(vp); 1998 free(cookies, M_TEMP); 1999 free(rbuf, M_TEMP); 2000 if (nd->nd_flag & ND_NFSV3) 2001 nfsrv_postopattr(nd, getret, &at); 2002 goto out; 2003 } 2004 2005 /* 2006 * Check to see if entries in this directory can be safely acquired 2007 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2008 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2009 * automount of the snapshot directory that is required will 2010 * be done. 2011 * This needs to be done here for NFSv4, since NFSv4 never does 2012 * a VFS_VGET() for "." or "..". 2013 */ 2014 if (is_zfs == 1) { 2015 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2016 if (r == EOPNOTSUPP) { 2017 usevget = 0; 2018 cn.cn_nameiop = LOOKUP; 2019 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2020 cn.cn_cred = nd->nd_cred; 2021 cn.cn_thread = p; 2022 } else if (r == 0) 2023 vput(nvp); 2024 } 2025 2026 /* 2027 * Save this position, in case there is an error before one entry 2028 * is created. 2029 */ 2030 mb0 = nd->nd_mb; 2031 bpos0 = nd->nd_bpos; 2032 2033 /* 2034 * Fill in the first part of the reply. 2035 * dirlen is the reply length in bytes and cannot exceed cnt. 2036 * (Include the two booleans at the end of the reply in dirlen now, 2037 * so we recognize when we have exceeded cnt.) 2038 */ 2039 if (nd->nd_flag & ND_NFSV3) { 2040 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2041 nfsrv_postopattr(nd, getret, &at); 2042 } else { 2043 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2044 } 2045 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2046 txdr_hyper(at.na_filerev, tl); 2047 2048 /* 2049 * Save this position, in case there is an empty reply needed. 2050 */ 2051 mb1 = nd->nd_mb; 2052 bpos1 = nd->nd_bpos; 2053 2054 /* Loop through the records and build reply */ 2055 entrycnt = 0; 2056 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2057 nlen = dp->d_namlen; 2058 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2059 nlen <= NFS_MAXNAMLEN && 2060 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2061 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2062 || (nlen == 1 && dp->d_name[0] != '.'))) { 2063 /* 2064 * Save the current position in the reply, in case 2065 * this entry exceeds cnt. 2066 */ 2067 mb1 = nd->nd_mb; 2068 bpos1 = nd->nd_bpos; 2069 2070 /* 2071 * For readdir_and_lookup get the vnode using 2072 * the file number. 2073 */ 2074 nvp = NULL; 2075 refp = NULL; 2076 r = 0; 2077 at_root = 0; 2078 needs_unbusy = 0; 2079 new_mp = mp; 2080 mounted_on_fileno = (uint64_t)dp->d_fileno; 2081 if ((nd->nd_flag & ND_NFSV3) || 2082 NFSNONZERO_ATTRBIT(&savbits)) { 2083 if (nd->nd_flag & ND_NFSV4) 2084 refp = nfsv4root_getreferral(NULL, 2085 vp, dp->d_fileno); 2086 if (refp == NULL) { 2087 if (usevget) 2088 r = VFS_VGET(mp, dp->d_fileno, 2089 LK_SHARED, &nvp); 2090 else 2091 r = EOPNOTSUPP; 2092 if (r == EOPNOTSUPP) { 2093 if (usevget) { 2094 usevget = 0; 2095 cn.cn_nameiop = LOOKUP; 2096 cn.cn_lkflags = 2097 LK_SHARED | 2098 LK_RETRY; 2099 cn.cn_cred = 2100 nd->nd_cred; 2101 cn.cn_thread = p; 2102 } 2103 cn.cn_nameptr = dp->d_name; 2104 cn.cn_namelen = nlen; 2105 cn.cn_flags = ISLASTCN | 2106 NOFOLLOW | LOCKLEAF; 2107 if (nlen == 2 && 2108 dp->d_name[0] == '.' && 2109 dp->d_name[1] == '.') 2110 cn.cn_flags |= 2111 ISDOTDOT; 2112 if (NFSVOPLOCK(vp, LK_SHARED) 2113 != 0) { 2114 nd->nd_repstat = EPERM; 2115 break; 2116 } 2117 if ((vp->v_vflag & VV_ROOT) != 0 2118 && (cn.cn_flags & ISDOTDOT) 2119 != 0) { 2120 vref(vp); 2121 nvp = vp; 2122 r = 0; 2123 } else { 2124 r = VOP_LOOKUP(vp, &nvp, 2125 &cn); 2126 if (vp != nvp) 2127 NFSVOPUNLOCK(vp, 2128 0); 2129 } 2130 } 2131 2132 /* 2133 * For NFSv4, check to see if nvp is 2134 * a mount point and get the mount 2135 * point vnode, as required. 2136 */ 2137 if (r == 0 && 2138 nfsrv_enable_crossmntpt != 0 && 2139 (nd->nd_flag & ND_NFSV4) != 0 && 2140 nvp->v_type == VDIR && 2141 nvp->v_mountedhere != NULL) { 2142 new_mp = nvp->v_mountedhere; 2143 r = vfs_busy(new_mp, 0); 2144 vput(nvp); 2145 nvp = NULL; 2146 if (r == 0) { 2147 r = VFS_ROOT(new_mp, 2148 LK_SHARED, &nvp); 2149 needs_unbusy = 1; 2150 if (r == 0) 2151 at_root = 1; 2152 } 2153 } 2154 } 2155 if (!r) { 2156 if (refp == NULL && 2157 ((nd->nd_flag & ND_NFSV3) || 2158 NFSNONZERO_ATTRBIT(&attrbits))) { 2159 r = nfsvno_getfh(nvp, &nfh, p); 2160 if (!r) 2161 r = nfsvno_getattr(nvp, nvap, 2162 nd->nd_cred, p, 1); 2163 if (r == 0 && is_zfs == 1 && 2164 nfsrv_enable_crossmntpt != 0 && 2165 (nd->nd_flag & ND_NFSV4) != 0 && 2166 nvp->v_type == VDIR && 2167 vp->v_mount != nvp->v_mount) { 2168 /* 2169 * For a ZFS snapshot, there is a 2170 * pseudo mount that does not set 2171 * v_mountedhere, so it needs to 2172 * be detected via a different 2173 * mount structure. 2174 */ 2175 at_root = 1; 2176 if (new_mp == mp) 2177 new_mp = nvp->v_mount; 2178 } 2179 } 2180 } else { 2181 nvp = NULL; 2182 } 2183 if (r) { 2184 if (!NFSISSET_ATTRBIT(&attrbits, 2185 NFSATTRBIT_RDATTRERROR)) { 2186 if (nvp != NULL) 2187 vput(nvp); 2188 if (needs_unbusy != 0) 2189 vfs_unbusy(new_mp); 2190 nd->nd_repstat = r; 2191 break; 2192 } 2193 } 2194 } 2195 2196 /* 2197 * Build the directory record xdr 2198 */ 2199 if (nd->nd_flag & ND_NFSV3) { 2200 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2201 *tl++ = newnfs_true; 2202 *tl++ = 0; 2203 *tl = txdr_unsigned(dp->d_fileno); 2204 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2205 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2206 *tl++ = 0; 2207 *tl = txdr_unsigned(*cookiep); 2208 nfsrv_postopattr(nd, 0, nvap); 2209 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2210 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2211 if (nvp != NULL) 2212 vput(nvp); 2213 } else { 2214 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2215 *tl++ = newnfs_true; 2216 *tl++ = 0; 2217 *tl = txdr_unsigned(*cookiep); 2218 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2219 if (nvp != NULL) { 2220 supports_nfsv4acls = 2221 nfs_supportsnfsv4acls(nvp); 2222 NFSVOPUNLOCK(nvp, 0); 2223 } else 2224 supports_nfsv4acls = 0; 2225 if (refp != NULL) { 2226 dirlen += nfsrv_putreferralattr(nd, 2227 &savbits, refp, 0, 2228 &nd->nd_repstat); 2229 if (nd->nd_repstat) { 2230 if (nvp != NULL) 2231 vrele(nvp); 2232 if (needs_unbusy != 0) 2233 vfs_unbusy(new_mp); 2234 break; 2235 } 2236 } else if (r) { 2237 dirlen += nfsvno_fillattr(nd, new_mp, 2238 nvp, nvap, &nfh, r, &rderrbits, 2239 nd->nd_cred, p, isdgram, 0, 2240 supports_nfsv4acls, at_root, 2241 mounted_on_fileno); 2242 } else { 2243 dirlen += nfsvno_fillattr(nd, new_mp, 2244 nvp, nvap, &nfh, r, &attrbits, 2245 nd->nd_cred, p, isdgram, 0, 2246 supports_nfsv4acls, at_root, 2247 mounted_on_fileno); 2248 } 2249 if (nvp != NULL) 2250 vrele(nvp); 2251 dirlen += (3 * NFSX_UNSIGNED); 2252 } 2253 if (needs_unbusy != 0) 2254 vfs_unbusy(new_mp); 2255 if (dirlen <= cnt) 2256 entrycnt++; 2257 } 2258 cpos += dp->d_reclen; 2259 dp = (struct dirent *)cpos; 2260 cookiep++; 2261 ncookies--; 2262 } 2263 vrele(vp); 2264 vfs_unbusy(mp); 2265 2266 /* 2267 * If dirlen > cnt, we must strip off the last entry. If that 2268 * results in an empty reply, report NFSERR_TOOSMALL. 2269 */ 2270 if (dirlen > cnt || nd->nd_repstat) { 2271 if (!nd->nd_repstat && entrycnt == 0) 2272 nd->nd_repstat = NFSERR_TOOSMALL; 2273 if (nd->nd_repstat) { 2274 newnfs_trimtrailing(nd, mb0, bpos0); 2275 if (nd->nd_flag & ND_NFSV3) 2276 nfsrv_postopattr(nd, getret, &at); 2277 } else 2278 newnfs_trimtrailing(nd, mb1, bpos1); 2279 eofflag = 0; 2280 } else if (cpos < cend) 2281 eofflag = 0; 2282 if (!nd->nd_repstat) { 2283 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2284 *tl++ = newnfs_false; 2285 if (eofflag) 2286 *tl = newnfs_true; 2287 else 2288 *tl = newnfs_false; 2289 } 2290 FREE((caddr_t)cookies, M_TEMP); 2291 FREE((caddr_t)rbuf, M_TEMP); 2292 2293 out: 2294 NFSEXITCODE2(0, nd); 2295 return (0); 2296 nfsmout: 2297 vput(vp); 2298 NFSEXITCODE2(error, nd); 2299 return (error); 2300 } 2301 2302 /* 2303 * Get the settable attributes out of the mbuf list. 2304 * (Return 0 or EBADRPC) 2305 */ 2306 int 2307 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2308 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2309 { 2310 u_int32_t *tl; 2311 struct nfsv2_sattr *sp; 2312 int error = 0, toclient = 0; 2313 2314 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2315 case ND_NFSV2: 2316 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2317 /* 2318 * Some old clients didn't fill in the high order 16bits. 2319 * --> check the low order 2 bytes for 0xffff 2320 */ 2321 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2322 nvap->na_mode = nfstov_mode(sp->sa_mode); 2323 if (sp->sa_uid != newnfs_xdrneg1) 2324 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2325 if (sp->sa_gid != newnfs_xdrneg1) 2326 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2327 if (sp->sa_size != newnfs_xdrneg1) 2328 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2329 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2330 #ifdef notyet 2331 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2332 #else 2333 nvap->na_atime.tv_sec = 2334 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2335 nvap->na_atime.tv_nsec = 0; 2336 #endif 2337 } 2338 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2339 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2340 break; 2341 case ND_NFSV3: 2342 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2343 if (*tl == newnfs_true) { 2344 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2345 nvap->na_mode = nfstov_mode(*tl); 2346 } 2347 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2348 if (*tl == newnfs_true) { 2349 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2350 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2351 } 2352 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2353 if (*tl == newnfs_true) { 2354 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2355 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2356 } 2357 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2358 if (*tl == newnfs_true) { 2359 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2360 nvap->na_size = fxdr_hyper(tl); 2361 } 2362 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2363 switch (fxdr_unsigned(int, *tl)) { 2364 case NFSV3SATTRTIME_TOCLIENT: 2365 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2366 fxdr_nfsv3time(tl, &nvap->na_atime); 2367 toclient = 1; 2368 break; 2369 case NFSV3SATTRTIME_TOSERVER: 2370 vfs_timestamp(&nvap->na_atime); 2371 nvap->na_vaflags |= VA_UTIMES_NULL; 2372 break; 2373 }; 2374 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2375 switch (fxdr_unsigned(int, *tl)) { 2376 case NFSV3SATTRTIME_TOCLIENT: 2377 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2378 fxdr_nfsv3time(tl, &nvap->na_mtime); 2379 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2380 break; 2381 case NFSV3SATTRTIME_TOSERVER: 2382 vfs_timestamp(&nvap->na_mtime); 2383 if (!toclient) 2384 nvap->na_vaflags |= VA_UTIMES_NULL; 2385 break; 2386 }; 2387 break; 2388 case ND_NFSV4: 2389 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2390 }; 2391 nfsmout: 2392 NFSEXITCODE2(error, nd); 2393 return (error); 2394 } 2395 2396 /* 2397 * Handle the setable attributes for V4. 2398 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2399 */ 2400 int 2401 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2402 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2403 { 2404 u_int32_t *tl; 2405 int attrsum = 0; 2406 int i, j; 2407 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2408 int toclient = 0; 2409 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2410 uid_t uid; 2411 gid_t gid; 2412 2413 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2414 if (error) 2415 goto nfsmout; 2416 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2417 attrsize = fxdr_unsigned(int, *tl); 2418 2419 /* 2420 * Loop around getting the setable attributes. If an unsupported 2421 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2422 */ 2423 if (retnotsup) { 2424 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2425 bitpos = NFSATTRBIT_MAX; 2426 } else { 2427 bitpos = 0; 2428 } 2429 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2430 if (attrsum > attrsize) { 2431 error = NFSERR_BADXDR; 2432 goto nfsmout; 2433 } 2434 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2435 switch (bitpos) { 2436 case NFSATTRBIT_SIZE: 2437 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2438 if (vp != NULL && vp->v_type != VREG) { 2439 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2440 NFSERR_INVAL; 2441 goto nfsmout; 2442 } 2443 nvap->na_size = fxdr_hyper(tl); 2444 attrsum += NFSX_HYPER; 2445 break; 2446 case NFSATTRBIT_ACL: 2447 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2448 p); 2449 if (error) 2450 goto nfsmout; 2451 if (aceerr && !nd->nd_repstat) 2452 nd->nd_repstat = aceerr; 2453 attrsum += aclsize; 2454 break; 2455 case NFSATTRBIT_ARCHIVE: 2456 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2457 if (!nd->nd_repstat) 2458 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2459 attrsum += NFSX_UNSIGNED; 2460 break; 2461 case NFSATTRBIT_HIDDEN: 2462 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2463 if (!nd->nd_repstat) 2464 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2465 attrsum += NFSX_UNSIGNED; 2466 break; 2467 case NFSATTRBIT_MIMETYPE: 2468 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2469 i = fxdr_unsigned(int, *tl); 2470 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2471 if (error) 2472 goto nfsmout; 2473 if (!nd->nd_repstat) 2474 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2475 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2476 break; 2477 case NFSATTRBIT_MODE: 2478 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2479 nvap->na_mode = nfstov_mode(*tl); 2480 attrsum += NFSX_UNSIGNED; 2481 break; 2482 case NFSATTRBIT_OWNER: 2483 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2484 j = fxdr_unsigned(int, *tl); 2485 if (j < 0) { 2486 error = NFSERR_BADXDR; 2487 goto nfsmout; 2488 } 2489 if (j > NFSV4_SMALLSTR) 2490 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2491 else 2492 cp = namestr; 2493 error = nfsrv_mtostr(nd, cp, j); 2494 if (error) { 2495 if (j > NFSV4_SMALLSTR) 2496 free(cp, M_NFSSTRING); 2497 goto nfsmout; 2498 } 2499 if (!nd->nd_repstat) { 2500 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2501 p); 2502 if (!nd->nd_repstat) 2503 nvap->na_uid = uid; 2504 } 2505 if (j > NFSV4_SMALLSTR) 2506 free(cp, M_NFSSTRING); 2507 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2508 break; 2509 case NFSATTRBIT_OWNERGROUP: 2510 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2511 j = fxdr_unsigned(int, *tl); 2512 if (j < 0) { 2513 error = NFSERR_BADXDR; 2514 goto nfsmout; 2515 } 2516 if (j > NFSV4_SMALLSTR) 2517 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2518 else 2519 cp = namestr; 2520 error = nfsrv_mtostr(nd, cp, j); 2521 if (error) { 2522 if (j > NFSV4_SMALLSTR) 2523 free(cp, M_NFSSTRING); 2524 goto nfsmout; 2525 } 2526 if (!nd->nd_repstat) { 2527 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2528 p); 2529 if (!nd->nd_repstat) 2530 nvap->na_gid = gid; 2531 } 2532 if (j > NFSV4_SMALLSTR) 2533 free(cp, M_NFSSTRING); 2534 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2535 break; 2536 case NFSATTRBIT_SYSTEM: 2537 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2538 if (!nd->nd_repstat) 2539 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2540 attrsum += NFSX_UNSIGNED; 2541 break; 2542 case NFSATTRBIT_TIMEACCESSSET: 2543 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2544 attrsum += NFSX_UNSIGNED; 2545 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2546 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2547 fxdr_nfsv4time(tl, &nvap->na_atime); 2548 toclient = 1; 2549 attrsum += NFSX_V4TIME; 2550 } else { 2551 vfs_timestamp(&nvap->na_atime); 2552 nvap->na_vaflags |= VA_UTIMES_NULL; 2553 } 2554 break; 2555 case NFSATTRBIT_TIMEBACKUP: 2556 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2557 if (!nd->nd_repstat) 2558 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2559 attrsum += NFSX_V4TIME; 2560 break; 2561 case NFSATTRBIT_TIMECREATE: 2562 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2563 if (!nd->nd_repstat) 2564 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2565 attrsum += NFSX_V4TIME; 2566 break; 2567 case NFSATTRBIT_TIMEMODIFYSET: 2568 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2569 attrsum += NFSX_UNSIGNED; 2570 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2571 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2572 fxdr_nfsv4time(tl, &nvap->na_mtime); 2573 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2574 attrsum += NFSX_V4TIME; 2575 } else { 2576 vfs_timestamp(&nvap->na_mtime); 2577 if (!toclient) 2578 nvap->na_vaflags |= VA_UTIMES_NULL; 2579 } 2580 break; 2581 default: 2582 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2583 /* 2584 * set bitpos so we drop out of the loop. 2585 */ 2586 bitpos = NFSATTRBIT_MAX; 2587 break; 2588 }; 2589 } 2590 2591 /* 2592 * some clients pad the attrlist, so we need to skip over the 2593 * padding. 2594 */ 2595 if (attrsum > attrsize) { 2596 error = NFSERR_BADXDR; 2597 } else { 2598 attrsize = NFSM_RNDUP(attrsize); 2599 if (attrsum < attrsize) 2600 error = nfsm_advance(nd, attrsize - attrsum, -1); 2601 } 2602 nfsmout: 2603 NFSEXITCODE2(error, nd); 2604 return (error); 2605 } 2606 2607 /* 2608 * Check/setup export credentials. 2609 */ 2610 int 2611 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2612 struct ucred *credanon) 2613 { 2614 int error = 0; 2615 2616 /* 2617 * Check/setup credentials. 2618 */ 2619 if (nd->nd_flag & ND_GSS) 2620 exp->nes_exflag &= ~MNT_EXPORTANON; 2621 2622 /* 2623 * Check to see if the operation is allowed for this security flavor. 2624 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2625 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2626 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2627 */ 2628 if (nfsvno_testexp(nd, exp) && 2629 nd->nd_procnum != NFSV4OP_SECINFO && 2630 nd->nd_procnum != NFSPROC_FSINFO) { 2631 if (nd->nd_flag & ND_NFSV4) 2632 error = NFSERR_WRONGSEC; 2633 else 2634 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2635 goto out; 2636 } 2637 2638 /* 2639 * Check to see if the file system is exported V4 only. 2640 */ 2641 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2642 error = NFSERR_PROGNOTV4; 2643 goto out; 2644 } 2645 2646 /* 2647 * Now, map the user credentials. 2648 * (Note that ND_AUTHNONE will only be set for an NFSv3 2649 * Fsinfo RPC. If set for anything else, this code might need 2650 * to change.) 2651 */ 2652 if (NFSVNO_EXPORTED(exp)) { 2653 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2654 NFSVNO_EXPORTANON(exp) || 2655 (nd->nd_flag & ND_AUTHNONE) != 0) { 2656 nd->nd_cred->cr_uid = credanon->cr_uid; 2657 nd->nd_cred->cr_gid = credanon->cr_gid; 2658 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2659 credanon->cr_groups); 2660 } else if ((nd->nd_flag & ND_GSS) == 0) { 2661 /* 2662 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2663 * if there is a replacement credential with a group 2664 * list set up by "nfsuserd -manage-gids". 2665 * If there is no replacement, nfsrv_getgrpscred() 2666 * simply returns its argument. 2667 */ 2668 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2669 } 2670 } 2671 2672 out: 2673 NFSEXITCODE2(error, nd); 2674 return (error); 2675 } 2676 2677 /* 2678 * Check exports. 2679 */ 2680 int 2681 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2682 struct ucred **credp) 2683 { 2684 int i, error, *secflavors; 2685 2686 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2687 &exp->nes_numsecflavor, &secflavors); 2688 if (error) { 2689 if (nfs_rootfhset) { 2690 exp->nes_exflag = 0; 2691 exp->nes_numsecflavor = 0; 2692 error = 0; 2693 } 2694 } else { 2695 /* Copy the security flavors. */ 2696 for (i = 0; i < exp->nes_numsecflavor; i++) 2697 exp->nes_secflavors[i] = secflavors[i]; 2698 } 2699 NFSEXITCODE(error); 2700 return (error); 2701 } 2702 2703 /* 2704 * Get a vnode for a file handle and export stuff. 2705 */ 2706 int 2707 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2708 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2709 struct ucred **credp) 2710 { 2711 int i, error, *secflavors; 2712 2713 *credp = NULL; 2714 exp->nes_numsecflavor = 0; 2715 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2716 if (error != 0) 2717 /* Make sure the server replies ESTALE to the client. */ 2718 error = ESTALE; 2719 if (nam && !error) { 2720 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2721 &exp->nes_numsecflavor, &secflavors); 2722 if (error) { 2723 if (nfs_rootfhset) { 2724 exp->nes_exflag = 0; 2725 exp->nes_numsecflavor = 0; 2726 error = 0; 2727 } else { 2728 vput(*vpp); 2729 } 2730 } else { 2731 /* Copy the security flavors. */ 2732 for (i = 0; i < exp->nes_numsecflavor; i++) 2733 exp->nes_secflavors[i] = secflavors[i]; 2734 } 2735 } 2736 NFSEXITCODE(error); 2737 return (error); 2738 } 2739 2740 /* 2741 * nfsd_fhtovp() - convert a fh to a vnode ptr 2742 * - look up fsid in mount list (if not found ret error) 2743 * - get vp and export rights by calling nfsvno_fhtovp() 2744 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2745 * for AUTH_SYS 2746 * - if mpp != NULL, return the mount point so that it can 2747 * be used for vn_finished_write() by the caller 2748 */ 2749 void 2750 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2751 struct vnode **vpp, struct nfsexstuff *exp, 2752 struct mount **mpp, int startwrite, struct thread *p) 2753 { 2754 struct mount *mp; 2755 struct ucred *credanon; 2756 fhandle_t *fhp; 2757 2758 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2759 /* 2760 * Check for the special case of the nfsv4root_fh. 2761 */ 2762 mp = vfs_busyfs(&fhp->fh_fsid); 2763 if (mpp != NULL) 2764 *mpp = mp; 2765 if (mp == NULL) { 2766 *vpp = NULL; 2767 nd->nd_repstat = ESTALE; 2768 goto out; 2769 } 2770 2771 if (startwrite) { 2772 vn_start_write(NULL, mpp, V_WAIT); 2773 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2774 lktype = LK_EXCLUSIVE; 2775 } 2776 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2777 &credanon); 2778 vfs_unbusy(mp); 2779 2780 /* 2781 * For NFSv4 without a pseudo root fs, unexported file handles 2782 * can be returned, so that Lookup works everywhere. 2783 */ 2784 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2785 !(nd->nd_flag & ND_NFSV4)) { 2786 vput(*vpp); 2787 nd->nd_repstat = EACCES; 2788 } 2789 2790 /* 2791 * Personally, I've never seen any point in requiring a 2792 * reserved port#, since only in the rare case where the 2793 * clients are all boxes with secure system priviledges, 2794 * does it provide any enhanced security, but... some people 2795 * believe it to be useful and keep putting this code back in. 2796 * (There is also some "security checker" out there that 2797 * complains if the nfs server doesn't enforce this.) 2798 * However, note the following: 2799 * RFC3530 (NFSv4) specifies that a reserved port# not be 2800 * required. 2801 * RFC2623 recommends that, if a reserved port# is checked for, 2802 * that there be a way to turn that off--> ifdef'd. 2803 */ 2804 #ifdef NFS_REQRSVPORT 2805 if (!nd->nd_repstat) { 2806 struct sockaddr_in *saddr; 2807 struct sockaddr_in6 *saddr6; 2808 2809 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2810 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2811 if (!(nd->nd_flag & ND_NFSV4) && 2812 ((saddr->sin_family == AF_INET && 2813 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2814 (saddr6->sin6_family == AF_INET6 && 2815 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2816 vput(*vpp); 2817 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2818 } 2819 } 2820 #endif /* NFS_REQRSVPORT */ 2821 2822 /* 2823 * Check/setup credentials. 2824 */ 2825 if (!nd->nd_repstat) { 2826 nd->nd_saveduid = nd->nd_cred->cr_uid; 2827 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2828 if (nd->nd_repstat) 2829 vput(*vpp); 2830 } 2831 if (credanon != NULL) 2832 crfree(credanon); 2833 if (nd->nd_repstat) { 2834 if (startwrite) 2835 vn_finished_write(mp); 2836 *vpp = NULL; 2837 if (mpp != NULL) 2838 *mpp = NULL; 2839 } 2840 2841 out: 2842 NFSEXITCODE2(0, nd); 2843 } 2844 2845 /* 2846 * glue for fp. 2847 */ 2848 static int 2849 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2850 { 2851 struct filedesc *fdp; 2852 struct file *fp; 2853 int error = 0; 2854 2855 fdp = p->td_proc->p_fd; 2856 if (fd < 0 || fd >= fdp->fd_nfiles || 2857 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2858 error = EBADF; 2859 goto out; 2860 } 2861 *fpp = fp; 2862 2863 out: 2864 NFSEXITCODE(error); 2865 return (error); 2866 } 2867 2868 /* 2869 * Called from nfssvc() to update the exports list. Just call 2870 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2871 * in the mount list. 2872 */ 2873 int 2874 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2875 { 2876 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2877 int error = 0; 2878 struct nameidata nd; 2879 fhandle_t fh; 2880 2881 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2882 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2883 nfs_rootfhset = 0; 2884 else if (error == 0) { 2885 if (nfsexargp->fspec == NULL) { 2886 error = EPERM; 2887 goto out; 2888 } 2889 /* 2890 * If fspec != NULL, this is the v4root path. 2891 */ 2892 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2893 nfsexargp->fspec, p); 2894 if ((error = namei(&nd)) != 0) 2895 goto out; 2896 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2897 vrele(nd.ni_vp); 2898 if (!error) { 2899 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2900 NFSBCOPY((caddr_t)&fh, 2901 nfs_rootfh.nfsrvfh_data, 2902 sizeof (fhandle_t)); 2903 nfs_rootfhset = 1; 2904 } 2905 } 2906 2907 out: 2908 NFSEXITCODE(error); 2909 return (error); 2910 } 2911 2912 /* 2913 * This function needs to test to see if the system is near its limit 2914 * for memory allocation via malloc() or mget() and return True iff 2915 * either of these resources are near their limit. 2916 * XXX (For now, this is just a stub.) 2917 */ 2918 int nfsrv_testmalloclimit = 0; 2919 int 2920 nfsrv_mallocmget_limit(void) 2921 { 2922 static int printmesg = 0; 2923 static int testval = 1; 2924 2925 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2926 if ((printmesg++ % 100) == 0) 2927 printf("nfsd: malloc/mget near limit\n"); 2928 return (1); 2929 } 2930 return (0); 2931 } 2932 2933 /* 2934 * BSD specific initialization of a mount point. 2935 */ 2936 void 2937 nfsd_mntinit(void) 2938 { 2939 static int inited = 0; 2940 2941 if (inited) 2942 return; 2943 inited = 1; 2944 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2945 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2946 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2947 nfsv4root_mnt.mnt_export = NULL; 2948 TAILQ_INIT(&nfsv4root_opt); 2949 TAILQ_INIT(&nfsv4root_newopt); 2950 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2951 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2952 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2953 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2954 } 2955 2956 /* 2957 * Get a vnode for a file handle, without checking exports, etc. 2958 */ 2959 struct vnode * 2960 nfsvno_getvp(fhandle_t *fhp) 2961 { 2962 struct mount *mp; 2963 struct vnode *vp; 2964 int error; 2965 2966 mp = vfs_busyfs(&fhp->fh_fsid); 2967 if (mp == NULL) 2968 return (NULL); 2969 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2970 vfs_unbusy(mp); 2971 if (error) 2972 return (NULL); 2973 return (vp); 2974 } 2975 2976 /* 2977 * Do a local VOP_ADVLOCK(). 2978 */ 2979 int 2980 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2981 u_int64_t end, struct thread *td) 2982 { 2983 int error = 0; 2984 struct flock fl; 2985 u_int64_t tlen; 2986 2987 if (nfsrv_dolocallocks == 0) 2988 goto out; 2989 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 2990 2991 fl.l_whence = SEEK_SET; 2992 fl.l_type = ftype; 2993 fl.l_start = (off_t)first; 2994 if (end == NFS64BITSSET) { 2995 fl.l_len = 0; 2996 } else { 2997 tlen = end - first; 2998 fl.l_len = (off_t)tlen; 2999 } 3000 /* 3001 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3002 * values for all calls, so that all locks will be held by the 3003 * nfsd server. (The nfsd server handles conflicts between the 3004 * various clients.) 3005 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3006 * bytes, so it can't be put in l_sysid. 3007 */ 3008 if (nfsv4_sysid == 0) 3009 nfsv4_sysid = nlm_acquire_next_sysid(); 3010 fl.l_pid = (pid_t)0; 3011 fl.l_sysid = (int)nfsv4_sysid; 3012 3013 if (ftype == F_UNLCK) 3014 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3015 (F_POSIX | F_REMOTE)); 3016 else 3017 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3018 (F_POSIX | F_REMOTE)); 3019 3020 out: 3021 NFSEXITCODE(error); 3022 return (error); 3023 } 3024 3025 /* 3026 * Check the nfsv4 root exports. 3027 */ 3028 int 3029 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3030 { 3031 struct ucred *credanon; 3032 int exflags, error = 0, numsecflavor, *secflavors, i; 3033 3034 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3035 &credanon, &numsecflavor, &secflavors); 3036 if (error) { 3037 error = NFSERR_PROGUNAVAIL; 3038 goto out; 3039 } 3040 if (credanon != NULL) 3041 crfree(credanon); 3042 for (i = 0; i < numsecflavor; i++) { 3043 if (secflavors[i] == AUTH_SYS) 3044 nd->nd_flag |= ND_EXAUTHSYS; 3045 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3046 nd->nd_flag |= ND_EXGSS; 3047 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3048 nd->nd_flag |= ND_EXGSSINTEGRITY; 3049 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3050 nd->nd_flag |= ND_EXGSSPRIVACY; 3051 } 3052 3053 out: 3054 NFSEXITCODE(error); 3055 return (error); 3056 } 3057 3058 /* 3059 * Nfs server psuedo system call for the nfsd's 3060 */ 3061 /* 3062 * MPSAFE 3063 */ 3064 static int 3065 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3066 { 3067 struct file *fp; 3068 struct nfsd_addsock_args sockarg; 3069 struct nfsd_nfsd_args nfsdarg; 3070 cap_rights_t rights; 3071 int error; 3072 3073 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3074 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3075 if (error) 3076 goto out; 3077 /* 3078 * Since we don't know what rights might be required, 3079 * pretend that we need them all. It is better to be too 3080 * careful than too reckless. 3081 */ 3082 error = fget(td, sockarg.sock, 3083 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3084 if (error != 0) 3085 goto out; 3086 if (fp->f_type != DTYPE_SOCKET) { 3087 fdrop(fp, td); 3088 error = EPERM; 3089 goto out; 3090 } 3091 error = nfsrvd_addsock(fp); 3092 fdrop(fp, td); 3093 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3094 if (uap->argp == NULL) { 3095 error = EINVAL; 3096 goto out; 3097 } 3098 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3099 sizeof (nfsdarg)); 3100 if (error) 3101 goto out; 3102 error = nfsrvd_nfsd(td, &nfsdarg); 3103 } else { 3104 error = nfssvc_srvcall(td, uap, td->td_ucred); 3105 } 3106 3107 out: 3108 NFSEXITCODE(error); 3109 return (error); 3110 } 3111 3112 static int 3113 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3114 { 3115 struct nfsex_args export; 3116 struct file *fp = NULL; 3117 int stablefd, len; 3118 struct nfsd_clid adminrevoke; 3119 struct nfsd_dumplist dumplist; 3120 struct nfsd_dumpclients *dumpclients; 3121 struct nfsd_dumplocklist dumplocklist; 3122 struct nfsd_dumplocks *dumplocks; 3123 struct nameidata nd; 3124 vnode_t vp; 3125 int error = EINVAL, igotlock; 3126 struct proc *procp; 3127 static int suspend_nfsd = 0; 3128 3129 if (uap->flag & NFSSVC_PUBLICFH) { 3130 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3131 sizeof (fhandle_t)); 3132 error = copyin(uap->argp, 3133 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3134 if (!error) 3135 nfs_pubfhset = 1; 3136 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3137 error = copyin(uap->argp,(caddr_t)&export, 3138 sizeof (struct nfsex_args)); 3139 if (!error) 3140 error = nfsrv_v4rootexport(&export, cred, p); 3141 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3142 nfs_pubfhset = 0; 3143 error = 0; 3144 } else if (uap->flag & NFSSVC_STABLERESTART) { 3145 error = copyin(uap->argp, (caddr_t)&stablefd, 3146 sizeof (int)); 3147 if (!error) 3148 error = fp_getfvp(p, stablefd, &fp, &vp); 3149 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3150 error = EBADF; 3151 if (!error && newnfs_numnfsd != 0) 3152 error = EPERM; 3153 if (!error) { 3154 nfsrv_stablefirst.nsf_fp = fp; 3155 nfsrv_setupstable(p); 3156 } 3157 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3158 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3159 sizeof (struct nfsd_clid)); 3160 if (!error) 3161 error = nfsrv_adminrevoke(&adminrevoke, p); 3162 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3163 error = copyin(uap->argp, (caddr_t)&dumplist, 3164 sizeof (struct nfsd_dumplist)); 3165 if (!error && (dumplist.ndl_size < 1 || 3166 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3167 error = EPERM; 3168 if (!error) { 3169 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3170 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3171 M_TEMP, M_WAITOK); 3172 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3173 error = copyout(dumpclients, 3174 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3175 free((caddr_t)dumpclients, M_TEMP); 3176 } 3177 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3178 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3179 sizeof (struct nfsd_dumplocklist)); 3180 if (!error && (dumplocklist.ndllck_size < 1 || 3181 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3182 error = EPERM; 3183 if (!error) 3184 error = nfsrv_lookupfilename(&nd, 3185 dumplocklist.ndllck_fname, p); 3186 if (!error) { 3187 len = sizeof (struct nfsd_dumplocks) * 3188 dumplocklist.ndllck_size; 3189 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3190 M_TEMP, M_WAITOK); 3191 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3192 dumplocklist.ndllck_size, p); 3193 vput(nd.ni_vp); 3194 error = copyout(dumplocks, 3195 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3196 free((caddr_t)dumplocks, M_TEMP); 3197 } 3198 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3199 procp = p->td_proc; 3200 PROC_LOCK(procp); 3201 nfsd_master_pid = procp->p_pid; 3202 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3203 nfsd_master_start = procp->p_stats->p_start; 3204 nfsd_master_proc = procp; 3205 PROC_UNLOCK(procp); 3206 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3207 NFSLOCKV4ROOTMUTEX(); 3208 if (suspend_nfsd == 0) { 3209 /* Lock out all nfsd threads */ 3210 do { 3211 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3212 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3213 } while (igotlock == 0 && suspend_nfsd == 0); 3214 suspend_nfsd = 1; 3215 } 3216 NFSUNLOCKV4ROOTMUTEX(); 3217 error = 0; 3218 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3219 NFSLOCKV4ROOTMUTEX(); 3220 if (suspend_nfsd != 0) { 3221 nfsv4_unlock(&nfsd_suspend_lock, 0); 3222 suspend_nfsd = 0; 3223 } 3224 NFSUNLOCKV4ROOTMUTEX(); 3225 error = 0; 3226 } 3227 3228 NFSEXITCODE(error); 3229 return (error); 3230 } 3231 3232 /* 3233 * Check exports. 3234 * Returns 0 if ok, 1 otherwise. 3235 */ 3236 int 3237 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3238 { 3239 int i; 3240 3241 /* 3242 * This seems odd, but allow the case where the security flavor 3243 * list is empty. This happens when NFSv4 is traversing non-exported 3244 * file systems. Exported file systems should always have a non-empty 3245 * security flavor list. 3246 */ 3247 if (exp->nes_numsecflavor == 0) 3248 return (0); 3249 3250 for (i = 0; i < exp->nes_numsecflavor; i++) { 3251 /* 3252 * The tests for privacy and integrity must be first, 3253 * since ND_GSS is set for everything but AUTH_SYS. 3254 */ 3255 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3256 (nd->nd_flag & ND_GSSPRIVACY)) 3257 return (0); 3258 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3259 (nd->nd_flag & ND_GSSINTEGRITY)) 3260 return (0); 3261 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3262 (nd->nd_flag & ND_GSS)) 3263 return (0); 3264 if (exp->nes_secflavors[i] == AUTH_SYS && 3265 (nd->nd_flag & ND_GSS) == 0) 3266 return (0); 3267 } 3268 return (1); 3269 } 3270 3271 /* 3272 * Calculate a hash value for the fid in a file handle. 3273 */ 3274 uint32_t 3275 nfsrv_hashfh(fhandle_t *fhp) 3276 { 3277 uint32_t hashval; 3278 3279 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3280 return (hashval); 3281 } 3282 3283 /* 3284 * Calculate a hash value for the sessionid. 3285 */ 3286 uint32_t 3287 nfsrv_hashsessionid(uint8_t *sessionid) 3288 { 3289 uint32_t hashval; 3290 3291 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3292 return (hashval); 3293 } 3294 3295 /* 3296 * Signal the userland master nfsd to backup the stable restart file. 3297 */ 3298 void 3299 nfsrv_backupstable(void) 3300 { 3301 struct proc *procp; 3302 3303 if (nfsd_master_proc != NULL) { 3304 procp = pfind(nfsd_master_pid); 3305 /* Try to make sure it is the correct process. */ 3306 if (procp == nfsd_master_proc && 3307 procp->p_stats->p_start.tv_sec == 3308 nfsd_master_start.tv_sec && 3309 procp->p_stats->p_start.tv_usec == 3310 nfsd_master_start.tv_usec && 3311 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3312 kern_psignal(procp, SIGUSR2); 3313 else 3314 nfsd_master_proc = NULL; 3315 3316 if (procp != NULL) 3317 PROC_UNLOCK(procp); 3318 } 3319 } 3320 3321 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3322 3323 /* 3324 * Called once to initialize data structures... 3325 */ 3326 static int 3327 nfsd_modevent(module_t mod, int type, void *data) 3328 { 3329 int error = 0, i; 3330 static int loaded = 0; 3331 3332 switch (type) { 3333 case MOD_LOAD: 3334 if (loaded) 3335 goto out; 3336 newnfs_portinit(); 3337 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3338 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 3339 MTX_DEF); 3340 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 3341 MTX_DEF); 3342 } 3343 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 3344 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 3345 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 3346 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3347 nfsrvd_initcache(); 3348 nfsd_init(); 3349 NFSD_LOCK(); 3350 nfsrvd_init(0); 3351 NFSD_UNLOCK(); 3352 nfsd_mntinit(); 3353 #ifdef VV_DISABLEDELEG 3354 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3355 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3356 #endif 3357 nfsd_call_servertimer = nfsrv_servertimer; 3358 nfsd_call_nfsd = nfssvc_nfsd; 3359 loaded = 1; 3360 break; 3361 3362 case MOD_UNLOAD: 3363 if (newnfs_numnfsd != 0) { 3364 error = EBUSY; 3365 break; 3366 } 3367 3368 #ifdef VV_DISABLEDELEG 3369 vn_deleg_ops.vndeleg_recall = NULL; 3370 vn_deleg_ops.vndeleg_disable = NULL; 3371 #endif 3372 nfsd_call_servertimer = NULL; 3373 nfsd_call_nfsd = NULL; 3374 3375 /* Clean out all NFSv4 state. */ 3376 nfsrv_throwawayallstate(curthread); 3377 3378 /* Clean the NFS server reply cache */ 3379 nfsrvd_cleancache(); 3380 3381 /* Free up the krpc server pool. */ 3382 if (nfsrvd_pool != NULL) 3383 svcpool_destroy(nfsrvd_pool); 3384 3385 /* and get rid of the locks */ 3386 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3387 mtx_destroy(&nfsrchash_table[i].mtx); 3388 mtx_destroy(&nfsrcahash_table[i].mtx); 3389 } 3390 mtx_destroy(&nfsrc_udpmtx); 3391 mtx_destroy(&nfs_v4root_mutex); 3392 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3393 for (i = 0; i < nfsrv_sessionhashsize; i++) 3394 mtx_destroy(&nfssessionhash[i].mtx); 3395 lockdestroy(&nfsv4root_mnt.mnt_explock); 3396 free(nfsclienthash, M_NFSDCLIENT); 3397 free(nfslockhash, M_NFSDLOCKFILE); 3398 free(nfssessionhash, M_NFSDSESSION); 3399 loaded = 0; 3400 break; 3401 default: 3402 error = EOPNOTSUPP; 3403 break; 3404 } 3405 3406 out: 3407 NFSEXITCODE(error); 3408 return (error); 3409 } 3410 static moduledata_t nfsd_mod = { 3411 "nfsd", 3412 nfsd_modevent, 3413 NULL, 3414 }; 3415 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3416 3417 /* So that loader and kldload(2) can find us, wherever we are.. */ 3418 MODULE_VERSION(nfsd, 1); 3419 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3420 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3421 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3422 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3423 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3424 3425