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