1 /* $NetBSD: nfs_nfsdport.c,v 1.4 2021/03/29 02:13:38 simonb Exp $ */ 2 /*- 3 * Copyright (c) 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Rick Macklem at The University of Guelph. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/cdefs.h> 36 /* __FBSDID("FreeBSD: head/sys/fs/nfsserver/nfs_nfsdport.c 308212 2016-11-02 12:43:15Z kib "); */ 37 __RCSID("$NetBSD: nfs_nfsdport.c,v 1.4 2021/03/29 02:13:38 simonb Exp $"); 38 39 #if 0 40 #include <sys/capsicum.h> 41 #endif 42 43 /* 44 * Functions that perform the vfs operations required by the routines in 45 * nfsd_serv.c. It is hoped that this change will make the server more 46 * portable. 47 */ 48 49 #include <fs/nfs/common/nfsport.h> 50 #include <sys/hash.h> 51 #include <sys/sysctl.h> 52 53 #if 0 54 #include <nlm/nlm_prot.h> 55 #include <nlm/nlm.h> 56 #endif 57 58 FEATURE(nfsd, "NFSv4 server"); 59 60 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 61 extern int nfsrv_useacl; 62 extern int newnfs_numnfsd; 63 extern struct mount nfsv4root_mnt; 64 extern struct nfsrv_stablefirst nfsrv_stablefirst; 65 extern void (*nfsd_call_servertimer)(void); 66 extern SVCPOOL *nfsrvd_pool; 67 extern struct nfsv4lock nfsd_suspend_lock; 68 extern struct nfsclienthashhead *nfsclienthash; 69 extern struct nfslockhashhead *nfslockhash; 70 extern struct nfssessionhash *nfssessionhash; 71 extern int nfsrv_sessionhashsize; 72 extern struct nfsstatsv1 nfsstatsv1; 73 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 74 NFSDLOCKMUTEX; 75 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 76 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 77 struct mtx nfsrc_udpmtx; 78 struct mtx nfs_v4root_mutex; 79 struct nfsrvfh nfs_rootfh, nfs_pubfh; 80 int nfs_pubfhset = 0, nfs_rootfhset = 0; 81 struct proc *nfsd_master_proc = NULL; 82 int nfsd_debuglevel = 0; 83 static pid_t nfsd_master_pid = (pid_t)-1; 84 static char nfsd_master_comm[MAXCOMLEN + 1]; 85 static struct timeval nfsd_master_start; 86 static uint32_t nfsv4_sysid = 0; 87 88 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 89 struct ucred *); 90 91 int nfsrv_enable_crossmntpt = 1; 92 static int nfs_commit_blks; 93 static int nfs_commit_miss; 94 extern int nfsrv_issuedelegs; 95 extern int nfsrv_dolocallocks; 96 extern int nfsd_enable_stringtouid; 97 98 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "NFS server"); 99 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 100 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 101 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 102 0, ""); 103 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 104 0, ""); 105 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 106 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 107 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 108 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 109 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 110 0, "Debug level for NFS server"); 111 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 112 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 113 114 #define MAX_REORDERED_RPC 16 115 #define NUM_HEURISTIC 1031 116 #define NHUSE_INIT 64 117 #define NHUSE_INC 16 118 #define NHUSE_MAX 2048 119 120 static struct nfsheur { 121 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 122 off_t nh_nextoff; /* next offset for sequential detection */ 123 int nh_use; /* use count for selection */ 124 int nh_seqcount; /* heuristic */ 125 } nfsheur[NUM_HEURISTIC]; 126 127 128 /* 129 * Heuristic to detect sequential operation. 130 */ 131 static struct nfsheur * 132 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 133 { 134 struct nfsheur *nh; 135 int hi, try; 136 137 /* Locate best candidate. */ 138 try = 32; 139 hi = ((int)(vaddr_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 140 nh = &nfsheur[hi]; 141 while (try--) { 142 if (nfsheur[hi].nh_vp == vp) { 143 nh = &nfsheur[hi]; 144 break; 145 } 146 if (nfsheur[hi].nh_use > 0) 147 --nfsheur[hi].nh_use; 148 hi = (hi + 1) % NUM_HEURISTIC; 149 if (nfsheur[hi].nh_use < nh->nh_use) 150 nh = &nfsheur[hi]; 151 } 152 153 /* Initialize hint if this is a new file. */ 154 if (nh->nh_vp != vp) { 155 nh->nh_vp = vp; 156 nh->nh_nextoff = uio->uio_offset; 157 nh->nh_use = NHUSE_INIT; 158 if (uio->uio_offset == 0) 159 nh->nh_seqcount = 4; 160 else 161 nh->nh_seqcount = 1; 162 } 163 164 /* Calculate heuristic. */ 165 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 166 uio->uio_offset == nh->nh_nextoff) { 167 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 168 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 169 if (nh->nh_seqcount > IO_SEQMAX) 170 nh->nh_seqcount = IO_SEQMAX; 171 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 172 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 173 /* Probably a reordered RPC, leave seqcount alone. */ 174 } else if (nh->nh_seqcount > 1) { 175 nh->nh_seqcount /= 2; 176 } else { 177 nh->nh_seqcount = 0; 178 } 179 nh->nh_use += NHUSE_INC; 180 if (nh->nh_use > NHUSE_MAX) 181 nh->nh_use = NHUSE_MAX; 182 return (nh); 183 } 184 185 /* 186 * Get attributes into nfsvattr structure. 187 */ 188 int 189 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 190 struct thread *p, int vpislocked) 191 { 192 int error, lockedit = 0; 193 194 if (vpislocked == 0) { 195 /* 196 * When vpislocked == 0, the vnode is either exclusively 197 * locked by this thread or not locked by this thread. 198 * As such, shared lock it, if not exclusively locked. 199 */ 200 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 201 lockedit = 1; 202 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 203 } 204 } 205 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 206 if (lockedit != 0) 207 NFSVOPUNLOCK(vp, 0); 208 209 NFSEXITCODE(error); 210 return (error); 211 } 212 213 /* 214 * Get a file handle for a vnode. 215 */ 216 int 217 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 218 { 219 int error; 220 221 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 222 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 223 error = VOP_VPTOFH(vp, &fhp->fh_fid); 224 225 NFSEXITCODE(error); 226 return (error); 227 } 228 229 /* 230 * Perform access checking for vnodes obtained from file handles that would 231 * refer to files already opened by a Unix client. You cannot just use 232 * vn_writechk() and VOP_ACCESSX() for two reasons. 233 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 234 * case. 235 * 2 - The owner is to be given access irrespective of mode bits for some 236 * operations, so that processes that chmod after opening a file don't 237 * break. 238 */ 239 int 240 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 241 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 242 u_int32_t *supportedtypep) 243 { 244 struct vattr vattr; 245 int error = 0, getret = 0; 246 247 if (vpislocked == 0) { 248 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 249 error = EPERM; 250 goto out; 251 } 252 } 253 if (accmode & VWRITE) { 254 /* Just vn_writechk() changed to check rdonly */ 255 /* 256 * Disallow write attempts on read-only file systems; 257 * unless the file is a socket or a block or character 258 * device resident on the file system. 259 */ 260 if (NFSVNO_EXRDONLY(exp) || 261 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 262 switch (vp->v_type) { 263 case VREG: 264 case VDIR: 265 case VLNK: 266 error = EROFS; 267 default: 268 break; 269 } 270 } 271 /* 272 * If there's shared text associated with 273 * the inode, try to free it up once. If 274 * we fail, we can't allow writing. 275 */ 276 if (VOP_IS_TEXT(vp) && error == 0) 277 error = ETXTBSY; 278 } 279 if (error != 0) { 280 if (vpislocked == 0) 281 NFSVOPUNLOCK(vp, 0); 282 goto out; 283 } 284 285 /* 286 * Should the override still be applied when ACLs are enabled? 287 */ 288 error = VOP_ACCESSX(vp, accmode, cred, p); 289 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 290 /* 291 * Try again with VEXPLICIT_DENY, to see if the test for 292 * deletion is supported. 293 */ 294 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 295 if (error == 0) { 296 if (vp->v_type == VDIR) { 297 accmode &= ~(VDELETE | VDELETE_CHILD); 298 accmode |= VWRITE; 299 error = VOP_ACCESSX(vp, accmode, cred, p); 300 } else if (supportedtypep != NULL) { 301 *supportedtypep &= ~NFSACCESS_DELETE; 302 } 303 } 304 } 305 306 /* 307 * Allow certain operations for the owner (reads and writes 308 * on files that are already open). 309 */ 310 if (override != NFSACCCHK_NOOVERRIDE && 311 (error == EPERM || error == EACCES)) { 312 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 313 error = 0; 314 else if (override & NFSACCCHK_ALLOWOWNER) { 315 getret = VOP_GETATTR(vp, &vattr, cred); 316 if (getret == 0 && cred->cr_uid == vattr.va_uid) 317 error = 0; 318 } 319 } 320 if (vpislocked == 0) 321 NFSVOPUNLOCK(vp, 0); 322 323 out: 324 NFSEXITCODE(error); 325 return (error); 326 } 327 328 /* 329 * Set attribute(s) vnop. 330 */ 331 int 332 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 333 struct thread *p, struct nfsexstuff *exp) 334 { 335 int error; 336 337 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 338 NFSEXITCODE(error); 339 return (error); 340 } 341 342 /* 343 * Set up nameidata for a lookup() call and do it. 344 */ 345 int 346 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 347 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 348 struct vnode **retdirp) 349 { 350 struct componentname *cnp = &ndp->ni_cnd; 351 int i; 352 struct iovec aiov; 353 struct uio auio; 354 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 355 int error = 0, crossmnt; 356 char *cp; 357 358 *retdirp = NULL; 359 cnp->cn_nameptr = cnp->cn_pnbuf; 360 ndp->ni_lcf = 0; 361 /* 362 * Extract and set starting directory. 363 */ 364 if (dp->v_type != VDIR) { 365 if (islocked) 366 vput(dp); 367 else 368 vrele(dp); 369 nfsvno_relpathbuf(ndp); 370 error = ENOTDIR; 371 goto out1; 372 } 373 if (islocked) 374 NFSVOPUNLOCK(dp, 0); 375 VREF(dp); 376 *retdirp = dp; 377 if (NFSVNO_EXRDONLY(exp)) 378 cnp->cn_flags |= RDONLY; 379 ndp->ni_segflg = UIO_SYSSPACE; 380 crossmnt = 1; 381 382 if (nd->nd_flag & ND_PUBLOOKUP) { 383 ndp->ni_loopcnt = 0; 384 if (cnp->cn_pnbuf[0] == '/') { 385 vrele(dp); 386 /* 387 * Check for degenerate pathnames here, since lookup() 388 * panics on them. 389 */ 390 for (i = 1; i < ndp->ni_pathlen; i++) 391 if (cnp->cn_pnbuf[i] != '/') 392 break; 393 if (i == ndp->ni_pathlen) { 394 error = NFSERR_ACCES; 395 goto out; 396 } 397 dp = rootvnode; 398 VREF(dp); 399 } 400 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 401 (nd->nd_flag & ND_NFSV4) == 0) { 402 /* 403 * Only cross mount points for NFSv4 when doing a 404 * mount while traversing the file system above 405 * the mount point, unless nfsrv_enable_crossmntpt is set. 406 */ 407 cnp->cn_flags |= NOCROSSMOUNT; 408 crossmnt = 0; 409 } 410 411 /* 412 * Initialize for scan, set ni_startdir and bump ref on dp again 413 * because lookup() will dereference ni_startdir. 414 */ 415 416 cnp->cn_thread = p; 417 ndp->ni_startdir = dp; 418 ndp->ni_rootdir = rootvnode; 419 ndp->ni_topdir = NULL; 420 421 if (!lockleaf) 422 cnp->cn_flags |= LOCKLEAF; 423 for (;;) { 424 cnp->cn_nameptr = cnp->cn_pnbuf; 425 /* 426 * Call lookup() to do the real work. If an error occurs, 427 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 428 * we do not have to dereference anything before returning. 429 * In either case ni_startdir will be dereferenced and NULLed 430 * out. 431 */ 432 error = lookup(ndp); 433 if (error) 434 break; 435 436 /* 437 * Check for encountering a symbolic link. Trivial 438 * termination occurs if no symlink encountered. 439 */ 440 if ((cnp->cn_flags & ISSYMLINK) == 0) { 441 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 442 nfsvno_relpathbuf(ndp); 443 if (ndp->ni_vp && !lockleaf) 444 NFSVOPUNLOCK(ndp->ni_vp, 0); 445 break; 446 } 447 448 /* 449 * Validate symlink 450 */ 451 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 452 NFSVOPUNLOCK(ndp->ni_dvp, 0); 453 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 454 error = EINVAL; 455 goto badlink2; 456 } 457 458 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 459 error = ELOOP; 460 goto badlink2; 461 } 462 if (ndp->ni_pathlen > 1) 463 cp = uma_zalloc(namei_zone, M_WAITOK); 464 else 465 cp = cnp->cn_pnbuf; 466 aiov.iov_base = cp; 467 aiov.iov_len = MAXPATHLEN; 468 auio.uio_iov = &aiov; 469 auio.uio_iovcnt = 1; 470 auio.uio_offset = 0; 471 auio.uio_rw = UIO_READ; 472 auio.uio_segflg = UIO_SYSSPACE; 473 auio.uio_td = NULL; 474 auio.uio_resid = MAXPATHLEN; 475 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 476 if (error) { 477 badlink1: 478 if (ndp->ni_pathlen > 1) 479 uma_zfree(namei_zone, cp); 480 badlink2: 481 vrele(ndp->ni_dvp); 482 vput(ndp->ni_vp); 483 break; 484 } 485 linklen = MAXPATHLEN - auio.uio_resid; 486 if (linklen == 0) { 487 error = ENOENT; 488 goto badlink1; 489 } 490 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 491 error = ENAMETOOLONG; 492 goto badlink1; 493 } 494 495 /* 496 * Adjust or replace path 497 */ 498 if (ndp->ni_pathlen > 1) { 499 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 500 uma_zfree(namei_zone, cnp->cn_pnbuf); 501 cnp->cn_pnbuf = cp; 502 } else 503 cnp->cn_pnbuf[linklen] = '\0'; 504 ndp->ni_pathlen += linklen; 505 506 /* 507 * Cleanup refs for next loop and check if root directory 508 * should replace current directory. Normally ni_dvp 509 * becomes the new base directory and is cleaned up when 510 * we loop. Explicitly null pointers after invalidation 511 * to clarify operation. 512 */ 513 vput(ndp->ni_vp); 514 ndp->ni_vp = NULL; 515 516 if (cnp->cn_pnbuf[0] == '/') { 517 vrele(ndp->ni_dvp); 518 ndp->ni_dvp = ndp->ni_rootdir; 519 VREF(ndp->ni_dvp); 520 } 521 ndp->ni_startdir = ndp->ni_dvp; 522 ndp->ni_dvp = NULL; 523 } 524 if (!lockleaf) 525 cnp->cn_flags &= ~LOCKLEAF; 526 527 out: 528 if (error) { 529 nfsvno_relpathbuf(ndp); 530 ndp->ni_vp = NULL; 531 ndp->ni_dvp = NULL; 532 ndp->ni_startdir = NULL; 533 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 534 ndp->ni_dvp = NULL; 535 } 536 537 out1: 538 NFSEXITCODE2(error, nd); 539 return (error); 540 } 541 542 /* 543 * Set up a pathname buffer and return a pointer to it and, optionally 544 * set a hash pointer. 545 */ 546 void 547 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 548 { 549 struct componentname *cnp = &ndp->ni_cnd; 550 551 cnp->cn_flags |= (NOMACCHECK | HASBUF); 552 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 553 if (hashpp != NULL) 554 *hashpp = NULL; 555 *bufpp = cnp->cn_pnbuf; 556 } 557 558 /* 559 * Release the above path buffer, if not released by nfsvno_namei(). 560 */ 561 void 562 nfsvno_relpathbuf(struct nameidata *ndp) 563 { 564 565 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 566 panic("nfsrelpath"); 567 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 568 ndp->ni_cnd.cn_flags &= ~HASBUF; 569 } 570 571 /* 572 * Readlink vnode op into an mbuf list. 573 */ 574 int 575 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 576 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 577 { 578 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 579 struct iovec *ivp = iv; 580 struct uio io, *uiop = &io; 581 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 582 int i, len, tlen, error = 0; 583 584 len = 0; 585 i = 0; 586 while (len < NFS_MAXPATHLEN) { 587 NFSMGET(mp); 588 MCLGET(mp, M_WAITOK); 589 mp->m_len = M_SIZE(mp); 590 if (len == 0) { 591 mp3 = mp2 = mp; 592 } else { 593 mp2->m_next = mp; 594 mp2 = mp; 595 } 596 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 597 mp->m_len = NFS_MAXPATHLEN - len; 598 len = NFS_MAXPATHLEN; 599 } else { 600 len += mp->m_len; 601 } 602 ivp->iov_base = mtod(mp, caddr_t); 603 ivp->iov_len = mp->m_len; 604 i++; 605 ivp++; 606 } 607 uiop->uio_iov = iv; 608 uiop->uio_iovcnt = i; 609 uiop->uio_offset = 0; 610 uiop->uio_resid = len; 611 uiop->uio_rw = UIO_READ; 612 uiop->uio_segflg = UIO_SYSSPACE; 613 uiop->uio_td = NULL; 614 error = VOP_READLINK(vp, uiop, cred); 615 if (error) { 616 m_freem(mp3); 617 *lenp = 0; 618 goto out; 619 } 620 if (uiop->uio_resid > 0) { 621 len -= uiop->uio_resid; 622 tlen = NFSM_RNDUP(len); 623 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 624 } 625 *lenp = len; 626 *mpp = mp3; 627 *mpendp = mp; 628 629 out: 630 NFSEXITCODE(error); 631 return (error); 632 } 633 634 /* 635 * Read vnode op call into mbuf list. 636 */ 637 int 638 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 639 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 640 { 641 struct mbuf *m; 642 int i; 643 struct iovec *iv; 644 struct iovec *iv2; 645 int error = 0, len, left, siz, tlen, ioflag = 0; 646 struct mbuf *m2 = NULL, *m3; 647 struct uio io, *uiop = &io; 648 struct nfsheur *nh; 649 650 len = left = NFSM_RNDUP(cnt); 651 m3 = NULL; 652 /* 653 * Generate the mbuf list with the uio_iov ref. to it. 654 */ 655 i = 0; 656 while (left > 0) { 657 NFSMGET(m); 658 MCLGET(m, M_WAITOK); 659 m->m_len = 0; 660 siz = uimin(M_TRAILINGSPACE(m), left); 661 left -= siz; 662 i++; 663 if (m3) 664 m2->m_next = m; 665 else 666 m3 = m; 667 m2 = m; 668 } 669 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 670 M_TEMP, M_WAITOK); 671 uiop->uio_iov = iv2 = iv; 672 m = m3; 673 left = len; 674 i = 0; 675 while (left > 0) { 676 if (m == NULL) 677 panic("nfsvno_read iov"); 678 siz = uimin(M_TRAILINGSPACE(m), left); 679 if (siz > 0) { 680 iv->iov_base = mtod(m, caddr_t) + m->m_len; 681 iv->iov_len = siz; 682 m->m_len += siz; 683 left -= siz; 684 iv++; 685 i++; 686 } 687 m = m->m_next; 688 } 689 uiop->uio_iovcnt = i; 690 uiop->uio_offset = off; 691 uiop->uio_resid = len; 692 uiop->uio_rw = UIO_READ; 693 uiop->uio_segflg = UIO_SYSSPACE; 694 uiop->uio_td = NULL; 695 nh = nfsrv_sequential_heuristic(uiop, vp); 696 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 697 /* XXX KDM make this more systematic? */ 698 nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid; 699 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 700 FREE((caddr_t)iv2, M_TEMP); 701 if (error) { 702 m_freem(m3); 703 *mpp = NULL; 704 goto out; 705 } 706 nh->nh_nextoff = uiop->uio_offset; 707 tlen = len - uiop->uio_resid; 708 cnt = cnt < tlen ? cnt : tlen; 709 tlen = NFSM_RNDUP(cnt); 710 if (tlen == 0) { 711 m_freem(m3); 712 m3 = NULL; 713 } else if (len != tlen || tlen != cnt) 714 nfsrv_adj(m3, len - tlen, tlen - cnt); 715 *mpp = m3; 716 *mpendp = m2; 717 718 out: 719 NFSEXITCODE(error); 720 return (error); 721 } 722 723 /* 724 * Write vnode op from an mbuf list. 725 */ 726 int 727 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 728 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 729 { 730 struct iovec *ivp; 731 int i, len; 732 struct iovec *iv; 733 int ioflags, error; 734 struct uio io, *uiop = &io; 735 struct nfsheur *nh; 736 737 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 738 M_WAITOK); 739 uiop->uio_iov = iv = ivp; 740 uiop->uio_iovcnt = cnt; 741 i = mtod(mp, caddr_t) + mp->m_len - cp; 742 len = retlen; 743 while (len > 0) { 744 if (mp == NULL) 745 panic("nfsvno_write"); 746 if (i > 0) { 747 i = uimin(i, len); 748 ivp->iov_base = cp; 749 ivp->iov_len = i; 750 ivp++; 751 len -= i; 752 } 753 mp = mp->m_next; 754 if (mp) { 755 i = mp->m_len; 756 cp = mtod(mp, caddr_t); 757 } 758 } 759 760 if (stable == NFSWRITE_UNSTABLE) 761 ioflags = IO_NODELOCKED; 762 else 763 ioflags = (IO_SYNC | IO_NODELOCKED); 764 uiop->uio_resid = retlen; 765 uiop->uio_rw = UIO_WRITE; 766 uiop->uio_segflg = UIO_SYSSPACE; 767 NFSUIOPROC(uiop, p); 768 uiop->uio_offset = off; 769 nh = nfsrv_sequential_heuristic(uiop, vp); 770 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 771 /* XXX KDM make this more systematic? */ 772 nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid; 773 error = VOP_WRITE(vp, uiop, ioflags, cred); 774 if (error == 0) 775 nh->nh_nextoff = uiop->uio_offset; 776 FREE((caddr_t)iv, M_TEMP); 777 778 NFSEXITCODE(error); 779 return (error); 780 } 781 782 /* 783 * Common code for creating a regular file (plus special files for V2). 784 */ 785 int 786 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 787 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 788 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 789 { 790 u_quad_t tempsize; 791 int error; 792 793 error = nd->nd_repstat; 794 if (!error && ndp->ni_vp == NULL) { 795 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 796 vrele(ndp->ni_startdir); 797 error = VOP_CREATE(ndp->ni_dvp, 798 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 799 vput(ndp->ni_dvp); 800 nfsvno_relpathbuf(ndp); 801 if (!error) { 802 if (*exclusive_flagp) { 803 *exclusive_flagp = 0; 804 NFSVNO_ATTRINIT(nvap); 805 nvap->na_atime.tv_sec = cverf[0]; 806 nvap->na_atime.tv_nsec = cverf[1]; 807 error = VOP_SETATTR(ndp->ni_vp, 808 &nvap->na_vattr, nd->nd_cred); 809 if (error != 0) { 810 vput(ndp->ni_vp); 811 ndp->ni_vp = NULL; 812 error = NFSERR_NOTSUPP; 813 } 814 } 815 } 816 /* 817 * NFS V2 Only. nfsrvd_mknod() does this for V3. 818 * (This implies, just get out on an error.) 819 */ 820 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 821 nvap->na_type == VFIFO) { 822 if (nvap->na_type == VCHR && rdev == 0xffffffff) 823 nvap->na_type = VFIFO; 824 if (nvap->na_type != VFIFO && 825 (error = priv_check_cred(nd->nd_cred, 826 PRIV_VFS_MKNOD_DEV, 0))) { 827 vrele(ndp->ni_startdir); 828 nfsvno_relpathbuf(ndp); 829 vput(ndp->ni_dvp); 830 goto out; 831 } 832 nvap->na_rdev = rdev; 833 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 834 &ndp->ni_cnd, &nvap->na_vattr); 835 vput(ndp->ni_dvp); 836 nfsvno_relpathbuf(ndp); 837 vrele(ndp->ni_startdir); 838 if (error) 839 goto out; 840 } else { 841 vrele(ndp->ni_startdir); 842 nfsvno_relpathbuf(ndp); 843 vput(ndp->ni_dvp); 844 error = ENXIO; 845 goto out; 846 } 847 *vpp = ndp->ni_vp; 848 } else { 849 /* 850 * Handle cases where error is already set and/or 851 * the file exists. 852 * 1 - clean up the lookup 853 * 2 - iff !error and na_size set, truncate it 854 */ 855 vrele(ndp->ni_startdir); 856 nfsvno_relpathbuf(ndp); 857 *vpp = ndp->ni_vp; 858 if (ndp->ni_dvp == *vpp) 859 vrele(ndp->ni_dvp); 860 else 861 vput(ndp->ni_dvp); 862 if (!error && nvap->na_size != VNOVAL) { 863 error = nfsvno_accchk(*vpp, VWRITE, 864 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 865 NFSACCCHK_VPISLOCKED, NULL); 866 if (!error) { 867 tempsize = nvap->na_size; 868 NFSVNO_ATTRINIT(nvap); 869 nvap->na_size = tempsize; 870 error = VOP_SETATTR(*vpp, 871 &nvap->na_vattr, nd->nd_cred); 872 } 873 } 874 if (error) 875 vput(*vpp); 876 } 877 878 out: 879 NFSEXITCODE(error); 880 return (error); 881 } 882 883 /* 884 * Do a mknod vnode op. 885 */ 886 int 887 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 888 struct thread *p) 889 { 890 int error = 0; 891 enum vtype vtyp; 892 893 vtyp = nvap->na_type; 894 /* 895 * Iff doesn't exist, create it. 896 */ 897 if (ndp->ni_vp) { 898 vrele(ndp->ni_startdir); 899 nfsvno_relpathbuf(ndp); 900 vput(ndp->ni_dvp); 901 vrele(ndp->ni_vp); 902 error = EEXIST; 903 goto out; 904 } 905 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 906 vrele(ndp->ni_startdir); 907 nfsvno_relpathbuf(ndp); 908 vput(ndp->ni_dvp); 909 error = NFSERR_BADTYPE; 910 goto out; 911 } 912 if (vtyp == VSOCK) { 913 vrele(ndp->ni_startdir); 914 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 915 &ndp->ni_cnd, &nvap->na_vattr); 916 vput(ndp->ni_dvp); 917 nfsvno_relpathbuf(ndp); 918 } else { 919 if (nvap->na_type != VFIFO && 920 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 921 vrele(ndp->ni_startdir); 922 nfsvno_relpathbuf(ndp); 923 vput(ndp->ni_dvp); 924 goto out; 925 } 926 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 927 &ndp->ni_cnd, &nvap->na_vattr); 928 vput(ndp->ni_dvp); 929 nfsvno_relpathbuf(ndp); 930 vrele(ndp->ni_startdir); 931 /* 932 * Since VOP_MKNOD returns the ni_vp, I can't 933 * see any reason to do the lookup. 934 */ 935 } 936 937 out: 938 NFSEXITCODE(error); 939 return (error); 940 } 941 942 /* 943 * Mkdir vnode op. 944 */ 945 int 946 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 947 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 948 { 949 int error = 0; 950 951 if (ndp->ni_vp != NULL) { 952 if (ndp->ni_dvp == ndp->ni_vp) 953 vrele(ndp->ni_dvp); 954 else 955 vput(ndp->ni_dvp); 956 vrele(ndp->ni_vp); 957 nfsvno_relpathbuf(ndp); 958 error = EEXIST; 959 goto out; 960 } 961 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 962 &nvap->na_vattr); 963 vput(ndp->ni_dvp); 964 nfsvno_relpathbuf(ndp); 965 966 out: 967 NFSEXITCODE(error); 968 return (error); 969 } 970 971 /* 972 * symlink vnode op. 973 */ 974 int 975 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 976 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 977 struct nfsexstuff *exp) 978 { 979 int error = 0; 980 981 if (ndp->ni_vp) { 982 vrele(ndp->ni_startdir); 983 nfsvno_relpathbuf(ndp); 984 if (ndp->ni_dvp == ndp->ni_vp) 985 vrele(ndp->ni_dvp); 986 else 987 vput(ndp->ni_dvp); 988 vrele(ndp->ni_vp); 989 error = EEXIST; 990 goto out; 991 } 992 993 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 994 &nvap->na_vattr, pathcp); 995 vput(ndp->ni_dvp); 996 vrele(ndp->ni_startdir); 997 nfsvno_relpathbuf(ndp); 998 /* 999 * Although FreeBSD still had the lookup code in 1000 * it for 7/current, there doesn't seem to be any 1001 * point, since VOP_SYMLINK() returns the ni_vp. 1002 * Just vput it for v2. 1003 */ 1004 if (!not_v2 && !error) 1005 vput(ndp->ni_vp); 1006 1007 out: 1008 NFSEXITCODE(error); 1009 return (error); 1010 } 1011 1012 /* 1013 * Parse symbolic link arguments. 1014 * This function has an ugly side effect. It will MALLOC() an area for 1015 * the symlink and set iov_base to point to it, only if it succeeds. 1016 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1017 * be FREE'd later. 1018 */ 1019 int 1020 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1021 struct thread *p, char **pathcpp, int *lenp) 1022 { 1023 u_int32_t *tl; 1024 char *pathcp = NULL; 1025 int error = 0, len; 1026 struct nfsv2_sattr *sp; 1027 1028 *pathcpp = NULL; 1029 *lenp = 0; 1030 if ((nd->nd_flag & ND_NFSV3) && 1031 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1032 goto nfsmout; 1033 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1034 len = fxdr_unsigned(int, *tl); 1035 if (len > NFS_MAXPATHLEN || len <= 0) { 1036 error = EBADRPC; 1037 goto nfsmout; 1038 } 1039 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1040 error = nfsrv_mtostr(nd, pathcp, len); 1041 if (error) 1042 goto nfsmout; 1043 if (nd->nd_flag & ND_NFSV2) { 1044 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1045 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1046 } 1047 *pathcpp = pathcp; 1048 *lenp = len; 1049 NFSEXITCODE2(0, nd); 1050 return (0); 1051 nfsmout: 1052 if (pathcp) 1053 free(pathcp, M_TEMP); 1054 NFSEXITCODE2(error, nd); 1055 return (error); 1056 } 1057 1058 /* 1059 * Remove a non-directory object. 1060 */ 1061 int 1062 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1063 struct thread *p, struct nfsexstuff *exp) 1064 { 1065 struct vnode *vp; 1066 int error = 0; 1067 1068 vp = ndp->ni_vp; 1069 if (vp->v_type == VDIR) 1070 error = NFSERR_ISDIR; 1071 else if (is_v4) 1072 error = nfsrv_checkremove(vp, 1, p); 1073 if (!error) 1074 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1075 if (ndp->ni_dvp == vp) 1076 vrele(ndp->ni_dvp); 1077 else 1078 vput(ndp->ni_dvp); 1079 vput(vp); 1080 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1081 nfsvno_relpathbuf(ndp); 1082 NFSEXITCODE(error); 1083 return (error); 1084 } 1085 1086 /* 1087 * Remove a directory. 1088 */ 1089 int 1090 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1091 struct thread *p, struct nfsexstuff *exp) 1092 { 1093 struct vnode *vp; 1094 int error = 0; 1095 1096 vp = ndp->ni_vp; 1097 if (vp->v_type != VDIR) { 1098 error = ENOTDIR; 1099 goto out; 1100 } 1101 /* 1102 * No rmdir "." please. 1103 */ 1104 if (ndp->ni_dvp == vp) { 1105 error = EINVAL; 1106 goto out; 1107 } 1108 /* 1109 * The root of a mounted filesystem cannot be deleted. 1110 */ 1111 if (vp->v_vflag & VV_ROOT) 1112 error = EBUSY; 1113 out: 1114 if (!error) 1115 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1116 if (ndp->ni_dvp == vp) 1117 vrele(ndp->ni_dvp); 1118 else 1119 vput(ndp->ni_dvp); 1120 vput(vp); 1121 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1122 nfsvno_relpathbuf(ndp); 1123 NFSEXITCODE(error); 1124 return (error); 1125 } 1126 1127 /* 1128 * Rename vnode op. 1129 */ 1130 int 1131 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1132 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1133 { 1134 struct vnode *fvp, *tvp, *tdvp; 1135 int error = 0; 1136 1137 fvp = fromndp->ni_vp; 1138 if (ndstat) { 1139 vrele(fromndp->ni_dvp); 1140 vrele(fvp); 1141 error = ndstat; 1142 goto out1; 1143 } 1144 tdvp = tondp->ni_dvp; 1145 tvp = tondp->ni_vp; 1146 if (tvp != NULL) { 1147 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1148 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1149 goto out; 1150 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1151 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1152 goto out; 1153 } 1154 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1155 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1156 goto out; 1157 } 1158 1159 /* 1160 * A rename to '.' or '..' results in a prematurely 1161 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1162 * here. 1163 */ 1164 if ((tondp->ni_cnd.cn_namelen == 1 && 1165 tondp->ni_cnd.cn_nameptr[0] == '.') || 1166 (tondp->ni_cnd.cn_namelen == 2 && 1167 tondp->ni_cnd.cn_nameptr[0] == '.' && 1168 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1169 error = EINVAL; 1170 goto out; 1171 } 1172 } 1173 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1174 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1175 goto out; 1176 } 1177 if (fvp->v_mount != tdvp->v_mount) { 1178 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1179 goto out; 1180 } 1181 if (fvp == tdvp) { 1182 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1183 goto out; 1184 } 1185 if (fvp == tvp) { 1186 /* 1187 * If source and destination are the same, there is nothing to 1188 * do. Set error to -1 to indicate this. 1189 */ 1190 error = -1; 1191 goto out; 1192 } 1193 if (ndflag & ND_NFSV4) { 1194 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1195 error = nfsrv_checkremove(fvp, 0, p); 1196 NFSVOPUNLOCK(fvp, 0); 1197 } else 1198 error = EPERM; 1199 if (tvp && !error) 1200 error = nfsrv_checkremove(tvp, 1, p); 1201 } else { 1202 /* 1203 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1204 * that the NFSv4 client won't be confused by the rename. 1205 * Since nfsd_recalldelegation() can only be called on an 1206 * unlocked vnode at this point and fvp is the file that will 1207 * still exist after the rename, just do fvp. 1208 */ 1209 nfsd_recalldelegation(fvp, p); 1210 } 1211 out: 1212 if (!error) { 1213 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1214 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1215 &tondp->ni_cnd); 1216 } else { 1217 if (tdvp == tvp) 1218 vrele(tdvp); 1219 else 1220 vput(tdvp); 1221 if (tvp) 1222 vput(tvp); 1223 vrele(fromndp->ni_dvp); 1224 vrele(fvp); 1225 if (error == -1) 1226 error = 0; 1227 } 1228 vrele(tondp->ni_startdir); 1229 nfsvno_relpathbuf(tondp); 1230 out1: 1231 vrele(fromndp->ni_startdir); 1232 nfsvno_relpathbuf(fromndp); 1233 NFSEXITCODE(error); 1234 return (error); 1235 } 1236 1237 /* 1238 * Link vnode op. 1239 */ 1240 int 1241 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1242 struct thread *p, struct nfsexstuff *exp) 1243 { 1244 struct vnode *xp; 1245 int error = 0; 1246 1247 xp = ndp->ni_vp; 1248 if (xp != NULL) { 1249 error = EEXIST; 1250 } else { 1251 xp = ndp->ni_dvp; 1252 if (vp->v_mount != xp->v_mount) 1253 error = EXDEV; 1254 } 1255 if (!error) { 1256 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1257 if ((vp->v_iflag & VI_DOOMED) == 0) 1258 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1259 else 1260 error = EPERM; 1261 if (ndp->ni_dvp == vp) 1262 vrele(ndp->ni_dvp); 1263 else 1264 vput(ndp->ni_dvp); 1265 NFSVOPUNLOCK(vp, 0); 1266 } else { 1267 if (ndp->ni_dvp == ndp->ni_vp) 1268 vrele(ndp->ni_dvp); 1269 else 1270 vput(ndp->ni_dvp); 1271 if (ndp->ni_vp) 1272 vrele(ndp->ni_vp); 1273 } 1274 nfsvno_relpathbuf(ndp); 1275 NFSEXITCODE(error); 1276 return (error); 1277 } 1278 1279 /* 1280 * Do the fsync() appropriate for the commit. 1281 */ 1282 int 1283 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1284 struct thread *td) 1285 { 1286 int error = 0; 1287 1288 /* 1289 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1290 * file is done. At this time VOP_FSYNC does not accept offset and 1291 * byte count parameters so call VOP_FSYNC the whole file for now. 1292 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1293 * File systems that do not use the buffer cache (as indicated 1294 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1295 */ 1296 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1297 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1298 /* 1299 * Give up and do the whole thing 1300 */ 1301 if (vp->v_object && 1302 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1303 VM_OBJECT_WLOCK(vp->v_object); 1304 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1305 VM_OBJECT_WUNLOCK(vp->v_object); 1306 } 1307 error = VOP_FSYNC(vp, MNT_WAIT, td); 1308 } else { 1309 /* 1310 * Locate and synchronously write any buffers that fall 1311 * into the requested range. Note: we are assuming that 1312 * f_iosize is a power of 2. 1313 */ 1314 int iosize = vp->v_mount->mnt_stat.f_iosize; 1315 int iomask = iosize - 1; 1316 struct bufobj *bo; 1317 daddr_t lblkno; 1318 1319 /* 1320 * Align to iosize boundary, super-align to page boundary. 1321 */ 1322 if (off & iomask) { 1323 cnt += off & iomask; 1324 off &= ~(u_quad_t)iomask; 1325 } 1326 if (off & PAGE_MASK) { 1327 cnt += off & PAGE_MASK; 1328 off &= ~(u_quad_t)PAGE_MASK; 1329 } 1330 lblkno = off / iosize; 1331 1332 if (vp->v_object && 1333 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1334 VM_OBJECT_WLOCK(vp->v_object); 1335 vm_object_page_clean(vp->v_object, off, off + cnt, 1336 OBJPC_SYNC); 1337 VM_OBJECT_WUNLOCK(vp->v_object); 1338 } 1339 1340 bo = &vp->v_bufobj; 1341 BO_LOCK(bo); 1342 while (cnt > 0) { 1343 struct buf *bp; 1344 1345 /* 1346 * If we have a buffer and it is marked B_DELWRI we 1347 * have to lock and write it. Otherwise the prior 1348 * write is assumed to have already been committed. 1349 * 1350 * gbincore() can return invalid buffers now so we 1351 * have to check that bit as well (though B_DELWRI 1352 * should not be set if B_INVAL is set there could be 1353 * a race here since we haven't locked the buffer). 1354 */ 1355 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1356 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1357 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1358 BO_LOCK(bo); 1359 continue; /* retry */ 1360 } 1361 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1362 B_DELWRI) { 1363 bremfree(bp); 1364 bp->b_flags &= ~B_ASYNC; 1365 bwrite(bp); 1366 ++nfs_commit_miss; 1367 } else 1368 BUF_UNLOCK(bp); 1369 BO_LOCK(bo); 1370 } 1371 ++nfs_commit_blks; 1372 if (cnt < iosize) 1373 break; 1374 cnt -= iosize; 1375 ++lblkno; 1376 } 1377 BO_UNLOCK(bo); 1378 } 1379 NFSEXITCODE(error); 1380 return (error); 1381 } 1382 1383 /* 1384 * Statfs vnode op. 1385 */ 1386 int 1387 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1388 { 1389 int error; 1390 1391 error = VFS_STATFS(vp->v_mount, sf); 1392 if (error == 0) { 1393 /* 1394 * Since NFS handles these values as unsigned on the 1395 * wire, there is no way to represent negative values, 1396 * so set them to 0. Without this, they will appear 1397 * to be very large positive values for clients like 1398 * Solaris10. 1399 */ 1400 if (sf->f_bavail < 0) 1401 sf->f_bavail = 0; 1402 if (sf->f_ffree < 0) 1403 sf->f_ffree = 0; 1404 } 1405 NFSEXITCODE(error); 1406 return (error); 1407 } 1408 1409 /* 1410 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1411 * must handle nfsrv_opencheck() calls after any other access checks. 1412 */ 1413 void 1414 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1415 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1416 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1417 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1418 struct nfsexstuff *exp, struct vnode **vpp) 1419 { 1420 struct vnode *vp = NULL; 1421 u_quad_t tempsize; 1422 struct nfsexstuff nes; 1423 1424 if (ndp->ni_vp == NULL) 1425 nd->nd_repstat = nfsrv_opencheck(clientid, 1426 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1427 if (!nd->nd_repstat) { 1428 if (ndp->ni_vp == NULL) { 1429 vrele(ndp->ni_startdir); 1430 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1431 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1432 vput(ndp->ni_dvp); 1433 nfsvno_relpathbuf(ndp); 1434 if (!nd->nd_repstat) { 1435 if (*exclusive_flagp) { 1436 *exclusive_flagp = 0; 1437 NFSVNO_ATTRINIT(nvap); 1438 nvap->na_atime.tv_sec = cverf[0]; 1439 nvap->na_atime.tv_nsec = cverf[1]; 1440 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1441 &nvap->na_vattr, cred); 1442 if (nd->nd_repstat != 0) { 1443 vput(ndp->ni_vp); 1444 ndp->ni_vp = NULL; 1445 nd->nd_repstat = NFSERR_NOTSUPP; 1446 } 1447 } else { 1448 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1449 aclp, p, attrbitp, exp); 1450 } 1451 } 1452 vp = ndp->ni_vp; 1453 } else { 1454 if (ndp->ni_startdir) 1455 vrele(ndp->ni_startdir); 1456 nfsvno_relpathbuf(ndp); 1457 vp = ndp->ni_vp; 1458 if (create == NFSV4OPEN_CREATE) { 1459 if (ndp->ni_dvp == vp) 1460 vrele(ndp->ni_dvp); 1461 else 1462 vput(ndp->ni_dvp); 1463 } 1464 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1465 if (ndp->ni_cnd.cn_flags & RDONLY) 1466 NFSVNO_SETEXRDONLY(&nes); 1467 else 1468 NFSVNO_EXINIT(&nes); 1469 nd->nd_repstat = nfsvno_accchk(vp, 1470 VWRITE, cred, &nes, p, 1471 NFSACCCHK_NOOVERRIDE, 1472 NFSACCCHK_VPISLOCKED, NULL); 1473 nd->nd_repstat = nfsrv_opencheck(clientid, 1474 stateidp, stp, vp, nd, p, nd->nd_repstat); 1475 if (!nd->nd_repstat) { 1476 tempsize = nvap->na_size; 1477 NFSVNO_ATTRINIT(nvap); 1478 nvap->na_size = tempsize; 1479 nd->nd_repstat = VOP_SETATTR(vp, 1480 &nvap->na_vattr, cred); 1481 } 1482 } else if (vp->v_type == VREG) { 1483 nd->nd_repstat = nfsrv_opencheck(clientid, 1484 stateidp, stp, vp, nd, p, nd->nd_repstat); 1485 } 1486 } 1487 } else { 1488 if (ndp->ni_cnd.cn_flags & HASBUF) 1489 nfsvno_relpathbuf(ndp); 1490 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1491 vrele(ndp->ni_startdir); 1492 if (ndp->ni_dvp == ndp->ni_vp) 1493 vrele(ndp->ni_dvp); 1494 else 1495 vput(ndp->ni_dvp); 1496 if (ndp->ni_vp) 1497 vput(ndp->ni_vp); 1498 } 1499 } 1500 *vpp = vp; 1501 1502 NFSEXITCODE2(0, nd); 1503 } 1504 1505 /* 1506 * Updates the file rev and sets the mtime and ctime 1507 * to the current clock time, returning the va_filerev and va_Xtime 1508 * values. 1509 * Return ESTALE to indicate the vnode is VI_DOOMED. 1510 */ 1511 int 1512 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1513 struct ucred *cred, struct thread *p) 1514 { 1515 struct vattr va; 1516 1517 VATTR_NULL(&va); 1518 vfs_timestamp(&va.va_mtime); 1519 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1520 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1521 if ((vp->v_iflag & VI_DOOMED) != 0) 1522 return (ESTALE); 1523 } 1524 (void) VOP_SETATTR(vp, &va, cred); 1525 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1526 return (0); 1527 } 1528 1529 /* 1530 * Glue routine to nfsv4_fillattr(). 1531 */ 1532 int 1533 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1534 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1535 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1536 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1537 { 1538 int error; 1539 1540 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1541 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1542 mounted_on_fileno); 1543 NFSEXITCODE2(0, nd); 1544 return (error); 1545 } 1546 1547 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1548 /* 1549 * nfs readdir service 1550 * - mallocs what it thinks is enough to read 1551 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1552 * - calls VOP_READDIR() 1553 * - loops around building the reply 1554 * if the output generated exceeds count break out of loop 1555 * The NFSM_CLGET macro is used here so that the reply will be packed 1556 * tightly in mbuf clusters. 1557 * - it trims out records with d_fileno == 0 1558 * this doesn't matter for Unix clients, but they might confuse clients 1559 * for other os'. 1560 * - it trims out records with d_type == DT_WHT 1561 * these cannot be seen through NFS (unless we extend the protocol) 1562 * The alternate call nfsrvd_readdirplus() does lookups as well. 1563 * PS: The NFS protocol spec. does not clarify what the "count" byte 1564 * argument is a count of.. just name strings and file id's or the 1565 * entire reply rpc or ... 1566 * I tried just file name and id sizes and it confused the Sun client, 1567 * so I am using the full rpc size now. The "paranoia.." comment refers 1568 * to including the status longwords that are not a part of the dir. 1569 * "entry" structures, but are in the rpc. 1570 */ 1571 int 1572 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1573 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1574 { 1575 struct dirent *dp; 1576 u_int32_t *tl; 1577 int dirlen; 1578 char *cpos, *cend, *rbuf; 1579 struct nfsvattr at; 1580 int nlen, error = 0, getret = 1; 1581 int siz, cnt, fullsiz, eofflag, ncookies; 1582 u_int64_t off, toff, verf; 1583 u_long *cookies = NULL, *cookiep; 1584 struct uio io; 1585 struct iovec iv; 1586 int is_ufs; 1587 1588 if (nd->nd_repstat) { 1589 nfsrv_postopattr(nd, getret, &at); 1590 goto out; 1591 } 1592 if (nd->nd_flag & ND_NFSV2) { 1593 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1594 off = fxdr_unsigned(u_quad_t, *tl++); 1595 } else { 1596 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1597 off = fxdr_hyper(tl); 1598 tl += 2; 1599 verf = fxdr_hyper(tl); 1600 tl += 2; 1601 } 1602 toff = off; 1603 cnt = fxdr_unsigned(int, *tl); 1604 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1605 cnt = NFS_SRVMAXDATA(nd); 1606 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1607 fullsiz = siz; 1608 if (nd->nd_flag & ND_NFSV3) { 1609 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1610 p, 1); 1611 #if 0 1612 /* 1613 * va_filerev is not sufficient as a cookie verifier, 1614 * since it is not supposed to change when entries are 1615 * removed/added unless that offset cookies returned to 1616 * the client are no longer valid. 1617 */ 1618 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1619 nd->nd_repstat = NFSERR_BAD_COOKIE; 1620 #endif 1621 } 1622 if (!nd->nd_repstat && vp->v_type != VDIR) 1623 nd->nd_repstat = NFSERR_NOTDIR; 1624 if (nd->nd_repstat == 0 && cnt == 0) { 1625 if (nd->nd_flag & ND_NFSV2) 1626 /* NFSv2 does not have NFSERR_TOOSMALL */ 1627 nd->nd_repstat = EPERM; 1628 else 1629 nd->nd_repstat = NFSERR_TOOSMALL; 1630 } 1631 if (!nd->nd_repstat) 1632 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1633 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1634 NFSACCCHK_VPISLOCKED, NULL); 1635 if (nd->nd_repstat) { 1636 vput(vp); 1637 if (nd->nd_flag & ND_NFSV3) 1638 nfsrv_postopattr(nd, getret, &at); 1639 goto out; 1640 } 1641 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1642 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1643 again: 1644 eofflag = 0; 1645 if (cookies) { 1646 free((caddr_t)cookies, M_TEMP); 1647 cookies = NULL; 1648 } 1649 1650 iv.iov_base = rbuf; 1651 iv.iov_len = siz; 1652 io.uio_iov = &iv; 1653 io.uio_iovcnt = 1; 1654 io.uio_offset = (off_t)off; 1655 io.uio_resid = siz; 1656 io.uio_segflg = UIO_SYSSPACE; 1657 io.uio_rw = UIO_READ; 1658 io.uio_td = NULL; 1659 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1660 &cookies); 1661 off = (u_int64_t)io.uio_offset; 1662 if (io.uio_resid) 1663 siz -= io.uio_resid; 1664 1665 if (!cookies && !nd->nd_repstat) 1666 nd->nd_repstat = NFSERR_PERM; 1667 if (nd->nd_flag & ND_NFSV3) { 1668 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1669 if (!nd->nd_repstat) 1670 nd->nd_repstat = getret; 1671 } 1672 1673 /* 1674 * Handles the failed cases. nd->nd_repstat == 0 past here. 1675 */ 1676 if (nd->nd_repstat) { 1677 vput(vp); 1678 free((caddr_t)rbuf, M_TEMP); 1679 if (cookies) 1680 free((caddr_t)cookies, M_TEMP); 1681 if (nd->nd_flag & ND_NFSV3) 1682 nfsrv_postopattr(nd, getret, &at); 1683 goto out; 1684 } 1685 /* 1686 * If nothing read, return eof 1687 * rpc reply 1688 */ 1689 if (siz == 0) { 1690 vput(vp); 1691 if (nd->nd_flag & ND_NFSV2) { 1692 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1693 } else { 1694 nfsrv_postopattr(nd, getret, &at); 1695 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1696 txdr_hyper(at.na_filerev, tl); 1697 tl += 2; 1698 } 1699 *tl++ = newnfs_false; 1700 *tl = newnfs_true; 1701 FREE((caddr_t)rbuf, M_TEMP); 1702 FREE((caddr_t)cookies, M_TEMP); 1703 goto out; 1704 } 1705 1706 /* 1707 * Check for degenerate cases of nothing useful read. 1708 * If so go try again 1709 */ 1710 cpos = rbuf; 1711 cend = rbuf + siz; 1712 dp = (struct dirent *)cpos; 1713 cookiep = cookies; 1714 1715 /* 1716 * For some reason FreeBSD's ufs_readdir() chooses to back the 1717 * directory offset up to a block boundary, so it is necessary to 1718 * skip over the records that precede the requested offset. This 1719 * requires the assumption that file offset cookies monotonically 1720 * increase. 1721 */ 1722 while (cpos < cend && ncookies > 0 && 1723 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1724 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 1725 cpos += dp->d_reclen; 1726 dp = (struct dirent *)cpos; 1727 cookiep++; 1728 ncookies--; 1729 } 1730 if (cpos >= cend || ncookies == 0) { 1731 siz = fullsiz; 1732 toff = off; 1733 goto again; 1734 } 1735 vput(vp); 1736 1737 /* 1738 * dirlen is the size of the reply, including all XDR and must 1739 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1740 * if the XDR should be included in "count", but to be safe, we do. 1741 * (Include the two booleans at the end of the reply in dirlen now.) 1742 */ 1743 if (nd->nd_flag & ND_NFSV3) { 1744 nfsrv_postopattr(nd, getret, &at); 1745 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1746 txdr_hyper(at.na_filerev, tl); 1747 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1748 } else { 1749 dirlen = 2 * NFSX_UNSIGNED; 1750 } 1751 1752 /* Loop through the records and build reply */ 1753 while (cpos < cend && ncookies > 0) { 1754 nlen = dp->d_namlen; 1755 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1756 nlen <= NFS_MAXNAMLEN) { 1757 if (nd->nd_flag & ND_NFSV3) 1758 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1759 else 1760 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1761 if (dirlen > cnt) { 1762 eofflag = 0; 1763 break; 1764 } 1765 1766 /* 1767 * Build the directory record xdr from 1768 * the dirent entry. 1769 */ 1770 if (nd->nd_flag & ND_NFSV3) { 1771 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1772 *tl++ = newnfs_true; 1773 *tl++ = 0; 1774 } else { 1775 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1776 *tl++ = newnfs_true; 1777 } 1778 *tl = txdr_unsigned(dp->d_fileno); 1779 (void) nfsm_strtom(nd, dp->d_name, nlen); 1780 if (nd->nd_flag & ND_NFSV3) { 1781 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1782 *tl++ = 0; 1783 } else 1784 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1785 *tl = txdr_unsigned(*cookiep); 1786 } 1787 cpos += dp->d_reclen; 1788 dp = (struct dirent *)cpos; 1789 cookiep++; 1790 ncookies--; 1791 } 1792 if (cpos < cend) 1793 eofflag = 0; 1794 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1795 *tl++ = newnfs_false; 1796 if (eofflag) 1797 *tl = newnfs_true; 1798 else 1799 *tl = newnfs_false; 1800 FREE((caddr_t)rbuf, M_TEMP); 1801 FREE((caddr_t)cookies, M_TEMP); 1802 1803 out: 1804 NFSEXITCODE2(0, nd); 1805 return (0); 1806 nfsmout: 1807 vput(vp); 1808 NFSEXITCODE2(error, nd); 1809 return (error); 1810 } 1811 1812 /* 1813 * Readdirplus for V3 and Readdir for V4. 1814 */ 1815 int 1816 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1817 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1818 { 1819 struct dirent *dp; 1820 u_int32_t *tl; 1821 int dirlen; 1822 char *cpos, *cend, *rbuf; 1823 struct vnode *nvp; 1824 fhandle_t nfh; 1825 struct nfsvattr nva, at, *nvap = &nva; 1826 struct mbuf *mb0, *mb1; 1827 struct nfsreferral *refp; 1828 int nlen, r, error = 0, getret = 1, usevget = 1; 1829 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1830 caddr_t bpos0, bpos1; 1831 u_int64_t off, toff, verf; 1832 u_long *cookies = NULL, *cookiep; 1833 nfsattrbit_t attrbits, rderrbits, savbits; 1834 struct uio io; 1835 struct iovec iv; 1836 struct componentname cn; 1837 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 1838 struct mount *mp, *new_mp; 1839 uint64_t mounted_on_fileno; 1840 1841 if (nd->nd_repstat) { 1842 nfsrv_postopattr(nd, getret, &at); 1843 goto out; 1844 } 1845 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1846 off = fxdr_hyper(tl); 1847 toff = off; 1848 tl += 2; 1849 verf = fxdr_hyper(tl); 1850 tl += 2; 1851 siz = fxdr_unsigned(int, *tl++); 1852 cnt = fxdr_unsigned(int, *tl); 1853 1854 /* 1855 * Use the server's maximum data transfer size as the upper bound 1856 * on reply datalen. 1857 */ 1858 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1859 cnt = NFS_SRVMAXDATA(nd); 1860 1861 /* 1862 * siz is a "hint" of how much directory information (name, fileid, 1863 * cookie) should be in the reply. At least one client "hints" 0, 1864 * so I set it to cnt for that case. I also round it up to the 1865 * next multiple of DIRBLKSIZ. 1866 */ 1867 if (siz <= 0) 1868 siz = cnt; 1869 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1870 1871 if (nd->nd_flag & ND_NFSV4) { 1872 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1873 if (error) 1874 goto nfsmout; 1875 NFSSET_ATTRBIT(&savbits, &attrbits); 1876 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1877 NFSZERO_ATTRBIT(&rderrbits); 1878 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1879 } else { 1880 NFSZERO_ATTRBIT(&attrbits); 1881 } 1882 fullsiz = siz; 1883 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1884 if (!nd->nd_repstat) { 1885 if (off && verf != at.na_filerev) { 1886 /* 1887 * va_filerev is not sufficient as a cookie verifier, 1888 * since it is not supposed to change when entries are 1889 * removed/added unless that offset cookies returned to 1890 * the client are no longer valid. 1891 */ 1892 #if 0 1893 if (nd->nd_flag & ND_NFSV4) { 1894 nd->nd_repstat = NFSERR_NOTSAME; 1895 } else { 1896 nd->nd_repstat = NFSERR_BAD_COOKIE; 1897 } 1898 #endif 1899 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1900 nd->nd_repstat = NFSERR_BAD_COOKIE; 1901 } 1902 } 1903 if (!nd->nd_repstat && vp->v_type != VDIR) 1904 nd->nd_repstat = NFSERR_NOTDIR; 1905 if (!nd->nd_repstat && cnt == 0) 1906 nd->nd_repstat = NFSERR_TOOSMALL; 1907 if (!nd->nd_repstat) 1908 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1909 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1910 NFSACCCHK_VPISLOCKED, NULL); 1911 if (nd->nd_repstat) { 1912 vput(vp); 1913 if (nd->nd_flag & ND_NFSV3) 1914 nfsrv_postopattr(nd, getret, &at); 1915 goto out; 1916 } 1917 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1918 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 1919 1920 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1921 again: 1922 eofflag = 0; 1923 if (cookies) { 1924 free((caddr_t)cookies, M_TEMP); 1925 cookies = NULL; 1926 } 1927 1928 iv.iov_base = rbuf; 1929 iv.iov_len = siz; 1930 io.uio_iov = &iv; 1931 io.uio_iovcnt = 1; 1932 io.uio_offset = (off_t)off; 1933 io.uio_resid = siz; 1934 io.uio_segflg = UIO_SYSSPACE; 1935 io.uio_rw = UIO_READ; 1936 io.uio_td = NULL; 1937 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1938 &cookies); 1939 off = (u_int64_t)io.uio_offset; 1940 if (io.uio_resid) 1941 siz -= io.uio_resid; 1942 1943 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1944 1945 if (!cookies && !nd->nd_repstat) 1946 nd->nd_repstat = NFSERR_PERM; 1947 if (!nd->nd_repstat) 1948 nd->nd_repstat = getret; 1949 if (nd->nd_repstat) { 1950 vput(vp); 1951 if (cookies) 1952 free((caddr_t)cookies, M_TEMP); 1953 free((caddr_t)rbuf, M_TEMP); 1954 if (nd->nd_flag & ND_NFSV3) 1955 nfsrv_postopattr(nd, getret, &at); 1956 goto out; 1957 } 1958 /* 1959 * If nothing read, return eof 1960 * rpc reply 1961 */ 1962 if (siz == 0) { 1963 vput(vp); 1964 if (nd->nd_flag & ND_NFSV3) 1965 nfsrv_postopattr(nd, getret, &at); 1966 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1967 txdr_hyper(at.na_filerev, tl); 1968 tl += 2; 1969 *tl++ = newnfs_false; 1970 *tl = newnfs_true; 1971 free((caddr_t)cookies, M_TEMP); 1972 free((caddr_t)rbuf, M_TEMP); 1973 goto out; 1974 } 1975 1976 /* 1977 * Check for degenerate cases of nothing useful read. 1978 * If so go try again 1979 */ 1980 cpos = rbuf; 1981 cend = rbuf + siz; 1982 dp = (struct dirent *)cpos; 1983 cookiep = cookies; 1984 1985 /* 1986 * For some reason FreeBSD's ufs_readdir() chooses to back the 1987 * directory offset up to a block boundary, so it is necessary to 1988 * skip over the records that precede the requested offset. This 1989 * requires the assumption that file offset cookies monotonically 1990 * increase. 1991 */ 1992 while (cpos < cend && ncookies > 0 && 1993 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1994 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 1995 ((nd->nd_flag & ND_NFSV4) && 1996 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1997 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1998 cpos += dp->d_reclen; 1999 dp = (struct dirent *)cpos; 2000 cookiep++; 2001 ncookies--; 2002 } 2003 if (cpos >= cend || ncookies == 0) { 2004 siz = fullsiz; 2005 toff = off; 2006 goto again; 2007 } 2008 2009 /* 2010 * Busy the file system so that the mount point won't go away 2011 * and, as such, VFS_VGET() can be used safely. 2012 */ 2013 mp = vp->v_mount; 2014 vfs_ref(mp); 2015 NFSVOPUNLOCK(vp, 0); 2016 nd->nd_repstat = vfs_busy(mp, 0); 2017 vfs_rel(mp); 2018 if (nd->nd_repstat != 0) { 2019 vrele(vp); 2020 free(cookies, M_TEMP); 2021 free(rbuf, M_TEMP); 2022 if (nd->nd_flag & ND_NFSV3) 2023 nfsrv_postopattr(nd, getret, &at); 2024 goto out; 2025 } 2026 2027 /* 2028 * Check to see if entries in this directory can be safely acquired 2029 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2030 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2031 * automount of the snapshot directory that is required will 2032 * be done. 2033 * This needs to be done here for NFSv4, since NFSv4 never does 2034 * a VFS_VGET() for "." or "..". 2035 */ 2036 if (is_zfs == 1) { 2037 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2038 if (r == EOPNOTSUPP) { 2039 usevget = 0; 2040 cn.cn_nameiop = LOOKUP; 2041 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2042 cn.cn_cred = nd->nd_cred; 2043 cn.cn_thread = p; 2044 } else if (r == 0) 2045 vput(nvp); 2046 } 2047 2048 /* 2049 * Save this position, in case there is an error before one entry 2050 * is created. 2051 */ 2052 mb0 = nd->nd_mb; 2053 bpos0 = nd->nd_bpos; 2054 2055 /* 2056 * Fill in the first part of the reply. 2057 * dirlen is the reply length in bytes and cannot exceed cnt. 2058 * (Include the two booleans at the end of the reply in dirlen now, 2059 * so we recognize when we have exceeded cnt.) 2060 */ 2061 if (nd->nd_flag & ND_NFSV3) { 2062 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2063 nfsrv_postopattr(nd, getret, &at); 2064 } else { 2065 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2066 } 2067 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2068 txdr_hyper(at.na_filerev, tl); 2069 2070 /* 2071 * Save this position, in case there is an empty reply needed. 2072 */ 2073 mb1 = nd->nd_mb; 2074 bpos1 = nd->nd_bpos; 2075 2076 /* Loop through the records and build reply */ 2077 entrycnt = 0; 2078 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2079 nlen = dp->d_namlen; 2080 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2081 nlen <= NFS_MAXNAMLEN && 2082 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2083 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2084 || (nlen == 1 && dp->d_name[0] != '.'))) { 2085 /* 2086 * Save the current position in the reply, in case 2087 * this entry exceeds cnt. 2088 */ 2089 mb1 = nd->nd_mb; 2090 bpos1 = nd->nd_bpos; 2091 2092 /* 2093 * For readdir_and_lookup get the vnode using 2094 * the file number. 2095 */ 2096 nvp = NULL; 2097 refp = NULL; 2098 r = 0; 2099 at_root = 0; 2100 needs_unbusy = 0; 2101 new_mp = mp; 2102 mounted_on_fileno = (uint64_t)dp->d_fileno; 2103 if ((nd->nd_flag & ND_NFSV3) || 2104 NFSNONZERO_ATTRBIT(&savbits)) { 2105 if (nd->nd_flag & ND_NFSV4) 2106 refp = nfsv4root_getreferral(NULL, 2107 vp, dp->d_fileno); 2108 if (refp == NULL) { 2109 if (usevget) 2110 r = VFS_VGET(mp, dp->d_fileno, 2111 LK_SHARED, &nvp); 2112 else 2113 r = EOPNOTSUPP; 2114 if (r == EOPNOTSUPP) { 2115 if (usevget) { 2116 usevget = 0; 2117 cn.cn_nameiop = LOOKUP; 2118 cn.cn_lkflags = 2119 LK_SHARED | 2120 LK_RETRY; 2121 cn.cn_cred = 2122 nd->nd_cred; 2123 cn.cn_thread = p; 2124 } 2125 cn.cn_nameptr = dp->d_name; 2126 cn.cn_namelen = nlen; 2127 cn.cn_flags = ISLASTCN | 2128 NOFOLLOW | LOCKLEAF; 2129 if (nlen == 2 && 2130 dp->d_name[0] == '.' && 2131 dp->d_name[1] == '.') 2132 cn.cn_flags |= 2133 ISDOTDOT; 2134 if (NFSVOPLOCK(vp, LK_SHARED) 2135 != 0) { 2136 nd->nd_repstat = EPERM; 2137 break; 2138 } 2139 if ((vp->v_vflag & VV_ROOT) != 0 2140 && (cn.cn_flags & ISDOTDOT) 2141 != 0) { 2142 vref(vp); 2143 nvp = vp; 2144 r = 0; 2145 } else { 2146 r = VOP_LOOKUP(vp, &nvp, 2147 &cn); 2148 if (vp != nvp) 2149 NFSVOPUNLOCK(vp, 2150 0); 2151 } 2152 } 2153 2154 /* 2155 * For NFSv4, check to see if nvp is 2156 * a mount point and get the mount 2157 * point vnode, as required. 2158 */ 2159 if (r == 0 && 2160 nfsrv_enable_crossmntpt != 0 && 2161 (nd->nd_flag & ND_NFSV4) != 0 && 2162 nvp->v_type == VDIR && 2163 nvp->v_mountedhere != NULL) { 2164 new_mp = nvp->v_mountedhere; 2165 r = vfs_busy(new_mp, 0); 2166 vput(nvp); 2167 nvp = NULL; 2168 if (r == 0) { 2169 r = VFS_ROOT(new_mp, 2170 LK_SHARED, &nvp); 2171 needs_unbusy = 1; 2172 if (r == 0) 2173 at_root = 1; 2174 } 2175 } 2176 } 2177 if (!r) { 2178 if (refp == NULL && 2179 ((nd->nd_flag & ND_NFSV3) || 2180 NFSNONZERO_ATTRBIT(&attrbits))) { 2181 r = nfsvno_getfh(nvp, &nfh, p); 2182 if (!r) 2183 r = nfsvno_getattr(nvp, nvap, 2184 nd->nd_cred, p, 1); 2185 if (r == 0 && is_zfs == 1 && 2186 nfsrv_enable_crossmntpt != 0 && 2187 (nd->nd_flag & ND_NFSV4) != 0 && 2188 nvp->v_type == VDIR && 2189 vp->v_mount != nvp->v_mount) { 2190 /* 2191 * For a ZFS snapshot, there is a 2192 * pseudo mount that does not set 2193 * v_mountedhere, so it needs to 2194 * be detected via a different 2195 * mount structure. 2196 */ 2197 at_root = 1; 2198 if (new_mp == mp) 2199 new_mp = nvp->v_mount; 2200 } 2201 } 2202 } else { 2203 nvp = NULL; 2204 } 2205 if (r) { 2206 if (!NFSISSET_ATTRBIT(&attrbits, 2207 NFSATTRBIT_RDATTRERROR)) { 2208 if (nvp != NULL) 2209 vput(nvp); 2210 if (needs_unbusy != 0) 2211 vfs_unbusy(new_mp); 2212 nd->nd_repstat = r; 2213 break; 2214 } 2215 } 2216 } 2217 2218 /* 2219 * Build the directory record xdr 2220 */ 2221 if (nd->nd_flag & ND_NFSV3) { 2222 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2223 *tl++ = newnfs_true; 2224 *tl++ = 0; 2225 *tl = txdr_unsigned(dp->d_fileno); 2226 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2227 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2228 *tl++ = 0; 2229 *tl = txdr_unsigned(*cookiep); 2230 nfsrv_postopattr(nd, 0, nvap); 2231 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2232 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2233 if (nvp != NULL) 2234 vput(nvp); 2235 } else { 2236 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2237 *tl++ = newnfs_true; 2238 *tl++ = 0; 2239 *tl = txdr_unsigned(*cookiep); 2240 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2241 if (nvp != NULL) { 2242 supports_nfsv4acls = 2243 nfs_supportsnfsv4acls(nvp); 2244 NFSVOPUNLOCK(nvp, 0); 2245 } else 2246 supports_nfsv4acls = 0; 2247 if (refp != NULL) { 2248 dirlen += nfsrv_putreferralattr(nd, 2249 &savbits, refp, 0, 2250 &nd->nd_repstat); 2251 if (nd->nd_repstat) { 2252 if (nvp != NULL) 2253 vrele(nvp); 2254 if (needs_unbusy != 0) 2255 vfs_unbusy(new_mp); 2256 break; 2257 } 2258 } else if (r) { 2259 dirlen += nfsvno_fillattr(nd, new_mp, 2260 nvp, nvap, &nfh, r, &rderrbits, 2261 nd->nd_cred, p, isdgram, 0, 2262 supports_nfsv4acls, at_root, 2263 mounted_on_fileno); 2264 } else { 2265 dirlen += nfsvno_fillattr(nd, new_mp, 2266 nvp, nvap, &nfh, r, &attrbits, 2267 nd->nd_cred, p, isdgram, 0, 2268 supports_nfsv4acls, at_root, 2269 mounted_on_fileno); 2270 } 2271 if (nvp != NULL) 2272 vrele(nvp); 2273 dirlen += (3 * NFSX_UNSIGNED); 2274 } 2275 if (needs_unbusy != 0) 2276 vfs_unbusy(new_mp); 2277 if (dirlen <= cnt) 2278 entrycnt++; 2279 } 2280 cpos += dp->d_reclen; 2281 dp = (struct dirent *)cpos; 2282 cookiep++; 2283 ncookies--; 2284 } 2285 vrele(vp); 2286 vfs_unbusy(mp); 2287 2288 /* 2289 * If dirlen > cnt, we must strip off the last entry. If that 2290 * results in an empty reply, report NFSERR_TOOSMALL. 2291 */ 2292 if (dirlen > cnt || nd->nd_repstat) { 2293 if (!nd->nd_repstat && entrycnt == 0) 2294 nd->nd_repstat = NFSERR_TOOSMALL; 2295 if (nd->nd_repstat) { 2296 newnfs_trimtrailing(nd, mb0, bpos0); 2297 if (nd->nd_flag & ND_NFSV3) 2298 nfsrv_postopattr(nd, getret, &at); 2299 } else 2300 newnfs_trimtrailing(nd, mb1, bpos1); 2301 eofflag = 0; 2302 } else if (cpos < cend) 2303 eofflag = 0; 2304 if (!nd->nd_repstat) { 2305 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2306 *tl++ = newnfs_false; 2307 if (eofflag) 2308 *tl = newnfs_true; 2309 else 2310 *tl = newnfs_false; 2311 } 2312 FREE((caddr_t)cookies, M_TEMP); 2313 FREE((caddr_t)rbuf, M_TEMP); 2314 2315 out: 2316 NFSEXITCODE2(0, nd); 2317 return (0); 2318 nfsmout: 2319 vput(vp); 2320 NFSEXITCODE2(error, nd); 2321 return (error); 2322 } 2323 2324 /* 2325 * Get the settable attributes out of the mbuf list. 2326 * (Return 0 or EBADRPC) 2327 */ 2328 int 2329 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2330 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2331 { 2332 u_int32_t *tl; 2333 struct nfsv2_sattr *sp; 2334 int error = 0, toclient = 0; 2335 2336 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2337 case ND_NFSV2: 2338 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2339 /* 2340 * Some old clients didn't fill in the high order 16bits. 2341 * --> check the low order 2 bytes for 0xffff 2342 */ 2343 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2344 nvap->na_mode = nfstov_mode(sp->sa_mode); 2345 if (sp->sa_uid != newnfs_xdrneg1) 2346 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2347 if (sp->sa_gid != newnfs_xdrneg1) 2348 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2349 if (sp->sa_size != newnfs_xdrneg1) 2350 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2351 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2352 #ifdef notyet 2353 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2354 #else 2355 nvap->na_atime.tv_sec = 2356 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2357 nvap->na_atime.tv_nsec = 0; 2358 #endif 2359 } 2360 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2361 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2362 break; 2363 case ND_NFSV3: 2364 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2365 if (*tl == newnfs_true) { 2366 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2367 nvap->na_mode = nfstov_mode(*tl); 2368 } 2369 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2370 if (*tl == newnfs_true) { 2371 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2372 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2373 } 2374 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2375 if (*tl == newnfs_true) { 2376 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2377 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2378 } 2379 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2380 if (*tl == newnfs_true) { 2381 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2382 nvap->na_size = fxdr_hyper(tl); 2383 } 2384 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2385 switch (fxdr_unsigned(int, *tl)) { 2386 case NFSV3SATTRTIME_TOCLIENT: 2387 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2388 fxdr_nfsv3time(tl, &nvap->na_atime); 2389 toclient = 1; 2390 break; 2391 case NFSV3SATTRTIME_TOSERVER: 2392 vfs_timestamp(&nvap->na_atime); 2393 nvap->na_vaflags |= VA_UTIMES_NULL; 2394 break; 2395 } 2396 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2397 switch (fxdr_unsigned(int, *tl)) { 2398 case NFSV3SATTRTIME_TOCLIENT: 2399 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2400 fxdr_nfsv3time(tl, &nvap->na_mtime); 2401 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2402 break; 2403 case NFSV3SATTRTIME_TOSERVER: 2404 vfs_timestamp(&nvap->na_mtime); 2405 if (!toclient) 2406 nvap->na_vaflags |= VA_UTIMES_NULL; 2407 break; 2408 } 2409 break; 2410 case ND_NFSV4: 2411 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2412 } 2413 nfsmout: 2414 NFSEXITCODE2(error, nd); 2415 return (error); 2416 } 2417 2418 /* 2419 * Handle the setable attributes for V4. 2420 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2421 */ 2422 int 2423 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2424 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2425 { 2426 u_int32_t *tl; 2427 int attrsum = 0; 2428 int i, j; 2429 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2430 int toclient = 0; 2431 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2432 uid_t uid; 2433 gid_t gid; 2434 2435 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2436 if (error) 2437 goto nfsmout; 2438 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2439 attrsize = fxdr_unsigned(int, *tl); 2440 2441 /* 2442 * Loop around getting the setable attributes. If an unsupported 2443 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2444 */ 2445 if (retnotsup) { 2446 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2447 bitpos = NFSATTRBIT_MAX; 2448 } else { 2449 bitpos = 0; 2450 } 2451 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2452 if (attrsum > attrsize) { 2453 error = NFSERR_BADXDR; 2454 goto nfsmout; 2455 } 2456 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2457 switch (bitpos) { 2458 case NFSATTRBIT_SIZE: 2459 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2460 if (vp != NULL && vp->v_type != VREG) { 2461 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2462 NFSERR_INVAL; 2463 goto nfsmout; 2464 } 2465 nvap->na_size = fxdr_hyper(tl); 2466 attrsum += NFSX_HYPER; 2467 break; 2468 case NFSATTRBIT_ACL: 2469 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2470 p); 2471 if (error) 2472 goto nfsmout; 2473 if (aceerr && !nd->nd_repstat) 2474 nd->nd_repstat = aceerr; 2475 attrsum += aclsize; 2476 break; 2477 case NFSATTRBIT_ARCHIVE: 2478 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2479 if (!nd->nd_repstat) 2480 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2481 attrsum += NFSX_UNSIGNED; 2482 break; 2483 case NFSATTRBIT_HIDDEN: 2484 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2485 if (!nd->nd_repstat) 2486 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2487 attrsum += NFSX_UNSIGNED; 2488 break; 2489 case NFSATTRBIT_MIMETYPE: 2490 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2491 i = fxdr_unsigned(int, *tl); 2492 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2493 if (error) 2494 goto nfsmout; 2495 if (!nd->nd_repstat) 2496 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2497 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2498 break; 2499 case NFSATTRBIT_MODE: 2500 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2501 nvap->na_mode = nfstov_mode(*tl); 2502 attrsum += NFSX_UNSIGNED; 2503 break; 2504 case NFSATTRBIT_OWNER: 2505 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2506 j = fxdr_unsigned(int, *tl); 2507 if (j < 0) { 2508 error = NFSERR_BADXDR; 2509 goto nfsmout; 2510 } 2511 if (j > NFSV4_SMALLSTR) 2512 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2513 else 2514 cp = namestr; 2515 error = nfsrv_mtostr(nd, cp, j); 2516 if (error) { 2517 if (j > NFSV4_SMALLSTR) 2518 free(cp, M_NFSSTRING); 2519 goto nfsmout; 2520 } 2521 if (!nd->nd_repstat) { 2522 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2523 p); 2524 if (!nd->nd_repstat) 2525 nvap->na_uid = uid; 2526 } 2527 if (j > NFSV4_SMALLSTR) 2528 free(cp, M_NFSSTRING); 2529 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2530 break; 2531 case NFSATTRBIT_OWNERGROUP: 2532 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2533 j = fxdr_unsigned(int, *tl); 2534 if (j < 0) { 2535 error = NFSERR_BADXDR; 2536 goto nfsmout; 2537 } 2538 if (j > NFSV4_SMALLSTR) 2539 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2540 else 2541 cp = namestr; 2542 error = nfsrv_mtostr(nd, cp, j); 2543 if (error) { 2544 if (j > NFSV4_SMALLSTR) 2545 free(cp, M_NFSSTRING); 2546 goto nfsmout; 2547 } 2548 if (!nd->nd_repstat) { 2549 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2550 p); 2551 if (!nd->nd_repstat) 2552 nvap->na_gid = gid; 2553 } 2554 if (j > NFSV4_SMALLSTR) 2555 free(cp, M_NFSSTRING); 2556 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2557 break; 2558 case NFSATTRBIT_SYSTEM: 2559 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2560 if (!nd->nd_repstat) 2561 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2562 attrsum += NFSX_UNSIGNED; 2563 break; 2564 case NFSATTRBIT_TIMEACCESSSET: 2565 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2566 attrsum += NFSX_UNSIGNED; 2567 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2568 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2569 fxdr_nfsv4time(tl, &nvap->na_atime); 2570 toclient = 1; 2571 attrsum += NFSX_V4TIME; 2572 } else { 2573 vfs_timestamp(&nvap->na_atime); 2574 nvap->na_vaflags |= VA_UTIMES_NULL; 2575 } 2576 break; 2577 case NFSATTRBIT_TIMEBACKUP: 2578 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2579 if (!nd->nd_repstat) 2580 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2581 attrsum += NFSX_V4TIME; 2582 break; 2583 case NFSATTRBIT_TIMECREATE: 2584 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2585 if (!nd->nd_repstat) 2586 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2587 attrsum += NFSX_V4TIME; 2588 break; 2589 case NFSATTRBIT_TIMEMODIFYSET: 2590 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2591 attrsum += NFSX_UNSIGNED; 2592 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2593 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2594 fxdr_nfsv4time(tl, &nvap->na_mtime); 2595 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2596 attrsum += NFSX_V4TIME; 2597 } else { 2598 vfs_timestamp(&nvap->na_mtime); 2599 if (!toclient) 2600 nvap->na_vaflags |= VA_UTIMES_NULL; 2601 } 2602 break; 2603 default: 2604 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2605 /* 2606 * set bitpos so we drop out of the loop. 2607 */ 2608 bitpos = NFSATTRBIT_MAX; 2609 break; 2610 } 2611 } 2612 2613 /* 2614 * some clients pad the attrlist, so we need to skip over the 2615 * padding. 2616 */ 2617 if (attrsum > attrsize) { 2618 error = NFSERR_BADXDR; 2619 } else { 2620 attrsize = NFSM_RNDUP(attrsize); 2621 if (attrsum < attrsize) 2622 error = nfsm_advance(nd, attrsize - attrsum, -1); 2623 } 2624 nfsmout: 2625 NFSEXITCODE2(error, nd); 2626 return (error); 2627 } 2628 2629 /* 2630 * Check/setup export credentials. 2631 */ 2632 int 2633 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2634 struct ucred *credanon) 2635 { 2636 int error = 0; 2637 2638 /* 2639 * Check/setup credentials. 2640 */ 2641 if (nd->nd_flag & ND_GSS) 2642 exp->nes_exflag &= ~MNT_EXPORTANON; 2643 2644 /* 2645 * Check to see if the operation is allowed for this security flavor. 2646 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2647 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2648 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2649 */ 2650 if (nfsvno_testexp(nd, exp) && 2651 nd->nd_procnum != NFSV4OP_SECINFO && 2652 nd->nd_procnum != NFSPROC_FSINFO) { 2653 if (nd->nd_flag & ND_NFSV4) 2654 error = NFSERR_WRONGSEC; 2655 else 2656 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2657 goto out; 2658 } 2659 2660 /* 2661 * Check to see if the file system is exported V4 only. 2662 */ 2663 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2664 error = NFSERR_PROGNOTV4; 2665 goto out; 2666 } 2667 2668 /* 2669 * Now, map the user credentials. 2670 * (Note that ND_AUTHNONE will only be set for an NFSv3 2671 * Fsinfo RPC. If set for anything else, this code might need 2672 * to change.) 2673 */ 2674 if (NFSVNO_EXPORTED(exp)) { 2675 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2676 NFSVNO_EXPORTANON(exp) || 2677 (nd->nd_flag & ND_AUTHNONE) != 0) { 2678 nd->nd_cred->cr_uid = credanon->cr_uid; 2679 nd->nd_cred->cr_gid = credanon->cr_gid; 2680 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2681 credanon->cr_groups); 2682 } else if ((nd->nd_flag & ND_GSS) == 0) { 2683 /* 2684 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2685 * if there is a replacement credential with a group 2686 * list set up by "nfsuserd -manage-gids". 2687 * If there is no replacement, nfsrv_getgrpscred() 2688 * simply returns its argument. 2689 */ 2690 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2691 } 2692 } 2693 2694 out: 2695 NFSEXITCODE2(error, nd); 2696 return (error); 2697 } 2698 2699 /* 2700 * Check exports. 2701 */ 2702 int 2703 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2704 struct ucred **credp) 2705 { 2706 int i, error, *secflavors; 2707 2708 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2709 &exp->nes_numsecflavor, &secflavors); 2710 if (error) { 2711 if (nfs_rootfhset) { 2712 exp->nes_exflag = 0; 2713 exp->nes_numsecflavor = 0; 2714 error = 0; 2715 } 2716 } else { 2717 /* Copy the security flavors. */ 2718 for (i = 0; i < exp->nes_numsecflavor; i++) 2719 exp->nes_secflavors[i] = secflavors[i]; 2720 } 2721 NFSEXITCODE(error); 2722 return (error); 2723 } 2724 2725 /* 2726 * Get a vnode for a file handle and export stuff. 2727 */ 2728 int 2729 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2730 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2731 struct ucred **credp) 2732 { 2733 int i, error, *secflavors; 2734 2735 *credp = NULL; 2736 exp->nes_numsecflavor = 0; 2737 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2738 if (error != 0) 2739 /* Make sure the server replies ESTALE to the client. */ 2740 error = ESTALE; 2741 if (nam && !error) { 2742 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2743 &exp->nes_numsecflavor, &secflavors); 2744 if (error) { 2745 if (nfs_rootfhset) { 2746 exp->nes_exflag = 0; 2747 exp->nes_numsecflavor = 0; 2748 error = 0; 2749 } else { 2750 vput(*vpp); 2751 } 2752 } else { 2753 /* Copy the security flavors. */ 2754 for (i = 0; i < exp->nes_numsecflavor; i++) 2755 exp->nes_secflavors[i] = secflavors[i]; 2756 } 2757 } 2758 NFSEXITCODE(error); 2759 return (error); 2760 } 2761 2762 /* 2763 * nfsd_fhtovp() - convert a fh to a vnode ptr 2764 * - look up fsid in mount list (if not found ret error) 2765 * - get vp and export rights by calling nfsvno_fhtovp() 2766 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2767 * for AUTH_SYS 2768 * - if mpp != NULL, return the mount point so that it can 2769 * be used for vn_finished_write() by the caller 2770 */ 2771 void 2772 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2773 struct vnode **vpp, struct nfsexstuff *exp, 2774 struct mount **mpp, int startwrite, struct thread *p) 2775 { 2776 struct mount *mp; 2777 struct ucred *credanon; 2778 fhandle_t *fhp; 2779 2780 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2781 /* 2782 * Check for the special case of the nfsv4root_fh. 2783 */ 2784 mp = vfs_busyfs(&fhp->fh_fsid); 2785 if (mpp != NULL) 2786 *mpp = mp; 2787 if (mp == NULL) { 2788 *vpp = NULL; 2789 nd->nd_repstat = ESTALE; 2790 goto out; 2791 } 2792 2793 if (startwrite) { 2794 vn_start_write(NULL, mpp, V_WAIT); 2795 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2796 lktype = LK_EXCLUSIVE; 2797 } 2798 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2799 &credanon); 2800 vfs_unbusy(mp); 2801 2802 /* 2803 * For NFSv4 without a pseudo root fs, unexported file handles 2804 * can be returned, so that Lookup works everywhere. 2805 */ 2806 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2807 !(nd->nd_flag & ND_NFSV4)) { 2808 vput(*vpp); 2809 nd->nd_repstat = EACCES; 2810 } 2811 2812 /* 2813 * Personally, I've never seen any point in requiring a 2814 * reserved port#, since only in the rare case where the 2815 * clients are all boxes with secure system privileges, 2816 * does it provide any enhanced security, but... some people 2817 * believe it to be useful and keep putting this code back in. 2818 * (There is also some "security checker" out there that 2819 * complains if the nfs server doesn't enforce this.) 2820 * However, note the following: 2821 * RFC3530 (NFSv4) specifies that a reserved port# not be 2822 * required. 2823 * RFC2623 recommends that, if a reserved port# is checked for, 2824 * that there be a way to turn that off--> ifdef'd. 2825 */ 2826 #ifdef NFS_REQRSVPORT 2827 if (!nd->nd_repstat) { 2828 struct sockaddr_in *saddr; 2829 struct sockaddr_in6 *saddr6; 2830 2831 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2832 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2833 if (!(nd->nd_flag & ND_NFSV4) && 2834 ((saddr->sin_family == AF_INET && 2835 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2836 (saddr6->sin6_family == AF_INET6 && 2837 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2838 vput(*vpp); 2839 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2840 } 2841 } 2842 #endif /* NFS_REQRSVPORT */ 2843 2844 /* 2845 * Check/setup credentials. 2846 */ 2847 if (!nd->nd_repstat) { 2848 nd->nd_saveduid = nd->nd_cred->cr_uid; 2849 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2850 if (nd->nd_repstat) 2851 vput(*vpp); 2852 } 2853 if (credanon != NULL) 2854 crfree(credanon); 2855 if (nd->nd_repstat) { 2856 if (startwrite) 2857 vn_finished_write(mp); 2858 *vpp = NULL; 2859 if (mpp != NULL) 2860 *mpp = NULL; 2861 } 2862 2863 out: 2864 NFSEXITCODE2(0, nd); 2865 } 2866 2867 /* 2868 * glue for fp. 2869 */ 2870 static int 2871 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2872 { 2873 struct filedesc *fdp; 2874 struct file *fp; 2875 int error = 0; 2876 2877 fdp = p->td_proc->p_fd; 2878 if (fd < 0 || fd >= fdp->fd_nfiles || 2879 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2880 error = EBADF; 2881 goto out; 2882 } 2883 *fpp = fp; 2884 2885 out: 2886 NFSEXITCODE(error); 2887 return (error); 2888 } 2889 2890 /* 2891 * Called from nfssvc() to update the exports list. Just call 2892 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2893 * in the mount list. 2894 */ 2895 int 2896 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2897 { 2898 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2899 int error = 0; 2900 struct nameidata nd; 2901 fhandle_t fh; 2902 2903 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2904 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2905 nfs_rootfhset = 0; 2906 else if (error == 0) { 2907 if (nfsexargp->fspec == NULL) { 2908 error = EPERM; 2909 goto out; 2910 } 2911 /* 2912 * If fspec != NULL, this is the v4root path. 2913 */ 2914 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2915 nfsexargp->fspec, p); 2916 if ((error = namei(&nd)) != 0) 2917 goto out; 2918 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2919 vrele(nd.ni_vp); 2920 if (!error) { 2921 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2922 NFSBCOPY((caddr_t)&fh, 2923 nfs_rootfh.nfsrvfh_data, 2924 sizeof (fhandle_t)); 2925 nfs_rootfhset = 1; 2926 } 2927 } 2928 2929 out: 2930 NFSEXITCODE(error); 2931 return (error); 2932 } 2933 2934 /* 2935 * This function needs to test to see if the system is near its limit 2936 * for memory allocation via malloc() or mget() and return True iff 2937 * either of these resources are near their limit. 2938 * XXX (For now, this is just a stub.) 2939 */ 2940 int nfsrv_testmalloclimit = 0; 2941 int 2942 nfsrv_mallocmget_limit(void) 2943 { 2944 static int printmesg = 0; 2945 static int testval = 1; 2946 2947 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2948 if ((printmesg++ % 100) == 0) 2949 printf("nfsd: malloc/mget near limit\n"); 2950 return (1); 2951 } 2952 return (0); 2953 } 2954 2955 /* 2956 * BSD specific initialization of a mount point. 2957 */ 2958 void 2959 nfsd_mntinit(void) 2960 { 2961 static int inited = 0; 2962 2963 if (inited) 2964 return; 2965 inited = 1; 2966 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2967 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2968 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2969 nfsv4root_mnt.mnt_export = NULL; 2970 TAILQ_INIT(&nfsv4root_opt); 2971 TAILQ_INIT(&nfsv4root_newopt); 2972 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2973 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2974 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2975 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2976 } 2977 2978 /* 2979 * Get a vnode for a file handle, without checking exports, etc. 2980 */ 2981 struct vnode * 2982 nfsvno_getvp(fhandle_t *fhp) 2983 { 2984 struct mount *mp; 2985 struct vnode *vp; 2986 int error; 2987 2988 mp = vfs_busyfs(&fhp->fh_fsid); 2989 if (mp == NULL) 2990 return (NULL); 2991 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2992 vfs_unbusy(mp); 2993 if (error) 2994 return (NULL); 2995 return (vp); 2996 } 2997 2998 /* 2999 * Do a local VOP_ADVLOCK(). 3000 */ 3001 int 3002 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3003 u_int64_t end, struct thread *td) 3004 { 3005 int error = 0; 3006 struct flock fl; 3007 u_int64_t tlen; 3008 3009 if (nfsrv_dolocallocks == 0) 3010 goto out; 3011 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3012 3013 fl.l_whence = SEEK_SET; 3014 fl.l_type = ftype; 3015 fl.l_start = (off_t)first; 3016 if (end == NFS64BITSSET) { 3017 fl.l_len = 0; 3018 } else { 3019 tlen = end - first; 3020 fl.l_len = (off_t)tlen; 3021 } 3022 /* 3023 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3024 * values for all calls, so that all locks will be held by the 3025 * nfsd server. (The nfsd server handles conflicts between the 3026 * various clients.) 3027 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3028 * bytes, so it can't be put in l_sysid. 3029 */ 3030 if (nfsv4_sysid == 0) 3031 nfsv4_sysid = nlm_acquire_next_sysid(); 3032 fl.l_pid = (pid_t)0; 3033 fl.l_sysid = (int)nfsv4_sysid; 3034 3035 if (ftype == F_UNLCK) 3036 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3037 (F_POSIX | F_REMOTE)); 3038 else 3039 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3040 (F_POSIX | F_REMOTE)); 3041 3042 out: 3043 NFSEXITCODE(error); 3044 return (error); 3045 } 3046 3047 /* 3048 * Check the nfsv4 root exports. 3049 */ 3050 int 3051 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3052 { 3053 struct ucred *credanon; 3054 int exflags, error = 0, numsecflavor, *secflavors, i; 3055 3056 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3057 &credanon, &numsecflavor, &secflavors); 3058 if (error) { 3059 error = NFSERR_PROGUNAVAIL; 3060 goto out; 3061 } 3062 if (credanon != NULL) 3063 crfree(credanon); 3064 for (i = 0; i < numsecflavor; i++) { 3065 if (secflavors[i] == AUTH_SYS) 3066 nd->nd_flag |= ND_EXAUTHSYS; 3067 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3068 nd->nd_flag |= ND_EXGSS; 3069 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3070 nd->nd_flag |= ND_EXGSSINTEGRITY; 3071 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3072 nd->nd_flag |= ND_EXGSSPRIVACY; 3073 } 3074 3075 out: 3076 NFSEXITCODE(error); 3077 return (error); 3078 } 3079 3080 /* 3081 * Nfs server pseudo system call for the nfsd's 3082 */ 3083 /* 3084 * MPSAFE 3085 */ 3086 static int 3087 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3088 { 3089 struct file *fp; 3090 struct nfsd_addsock_args sockarg; 3091 struct nfsd_nfsd_args nfsdarg; 3092 cap_rights_t rights; 3093 int error; 3094 3095 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3096 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3097 if (error) 3098 goto out; 3099 /* 3100 * Since we don't know what rights might be required, 3101 * pretend that we need them all. It is better to be too 3102 * careful than too reckless. 3103 */ 3104 error = fget(td, sockarg.sock, 3105 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3106 if (error != 0) 3107 goto out; 3108 if (fp->f_type != DTYPE_SOCKET) { 3109 fdrop(fp, td); 3110 error = EPERM; 3111 goto out; 3112 } 3113 error = nfsrvd_addsock(fp); 3114 fdrop(fp, td); 3115 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3116 if (uap->argp == NULL) { 3117 error = EINVAL; 3118 goto out; 3119 } 3120 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3121 sizeof (nfsdarg)); 3122 if (error) 3123 goto out; 3124 error = nfsrvd_nfsd(td, &nfsdarg); 3125 } else { 3126 error = nfssvc_srvcall(td, uap, td->td_ucred); 3127 } 3128 3129 out: 3130 NFSEXITCODE(error); 3131 return (error); 3132 } 3133 3134 static int 3135 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3136 { 3137 struct nfsex_args export; 3138 struct file *fp = NULL; 3139 int stablefd, len; 3140 struct nfsd_clid adminrevoke; 3141 struct nfsd_dumplist dumplist; 3142 struct nfsd_dumpclients *dumpclients; 3143 struct nfsd_dumplocklist dumplocklist; 3144 struct nfsd_dumplocks *dumplocks; 3145 struct nameidata nd; 3146 vnode_t vp; 3147 int error = EINVAL, igotlock; 3148 struct proc *procp; 3149 static int suspend_nfsd = 0; 3150 3151 if (uap->flag & NFSSVC_PUBLICFH) { 3152 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3153 sizeof (fhandle_t)); 3154 error = copyin(uap->argp, 3155 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3156 if (!error) 3157 nfs_pubfhset = 1; 3158 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3159 error = copyin(uap->argp,(caddr_t)&export, 3160 sizeof (struct nfsex_args)); 3161 if (!error) 3162 error = nfsrv_v4rootexport(&export, cred, p); 3163 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3164 nfs_pubfhset = 0; 3165 error = 0; 3166 } else if (uap->flag & NFSSVC_STABLERESTART) { 3167 error = copyin(uap->argp, (caddr_t)&stablefd, 3168 sizeof (int)); 3169 if (!error) 3170 error = fp_getfvp(p, stablefd, &fp, &vp); 3171 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3172 error = EBADF; 3173 if (!error && newnfs_numnfsd != 0) 3174 error = EPERM; 3175 if (!error) { 3176 nfsrv_stablefirst.nsf_fp = fp; 3177 nfsrv_setupstable(p); 3178 } 3179 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3180 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3181 sizeof (struct nfsd_clid)); 3182 if (!error) 3183 error = nfsrv_adminrevoke(&adminrevoke, p); 3184 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3185 error = copyin(uap->argp, (caddr_t)&dumplist, 3186 sizeof (struct nfsd_dumplist)); 3187 if (!error && (dumplist.ndl_size < 1 || 3188 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3189 error = EPERM; 3190 if (!error) { 3191 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3192 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3193 M_TEMP, M_WAITOK); 3194 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3195 error = copyout(dumpclients, 3196 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3197 free((caddr_t)dumpclients, M_TEMP); 3198 } 3199 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3200 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3201 sizeof (struct nfsd_dumplocklist)); 3202 if (!error && (dumplocklist.ndllck_size < 1 || 3203 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3204 error = EPERM; 3205 if (!error) 3206 error = nfsrv_lookupfilename(&nd, 3207 dumplocklist.ndllck_fname, p); 3208 if (!error) { 3209 len = sizeof (struct nfsd_dumplocks) * 3210 dumplocklist.ndllck_size; 3211 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3212 M_TEMP, M_WAITOK); 3213 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3214 dumplocklist.ndllck_size, p); 3215 vput(nd.ni_vp); 3216 error = copyout(dumplocks, 3217 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3218 free((caddr_t)dumplocks, M_TEMP); 3219 } 3220 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3221 procp = p->td_proc; 3222 PROC_LOCK(procp); 3223 nfsd_master_pid = procp->p_pid; 3224 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3225 nfsd_master_start = procp->p_stats->p_start; 3226 nfsd_master_proc = procp; 3227 PROC_UNLOCK(procp); 3228 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3229 NFSLOCKV4ROOTMUTEX(); 3230 if (suspend_nfsd == 0) { 3231 /* Lock out all nfsd threads */ 3232 do { 3233 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3234 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3235 } while (igotlock == 0 && suspend_nfsd == 0); 3236 suspend_nfsd = 1; 3237 } 3238 NFSUNLOCKV4ROOTMUTEX(); 3239 error = 0; 3240 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3241 NFSLOCKV4ROOTMUTEX(); 3242 if (suspend_nfsd != 0) { 3243 nfsv4_unlock(&nfsd_suspend_lock, 0); 3244 suspend_nfsd = 0; 3245 } 3246 NFSUNLOCKV4ROOTMUTEX(); 3247 error = 0; 3248 } 3249 3250 NFSEXITCODE(error); 3251 return (error); 3252 } 3253 3254 /* 3255 * Check exports. 3256 * Returns 0 if ok, 1 otherwise. 3257 */ 3258 int 3259 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3260 { 3261 int i; 3262 3263 /* 3264 * This seems odd, but allow the case where the security flavor 3265 * list is empty. This happens when NFSv4 is traversing non-exported 3266 * file systems. Exported file systems should always have a non-empty 3267 * security flavor list. 3268 */ 3269 if (exp->nes_numsecflavor == 0) 3270 return (0); 3271 3272 for (i = 0; i < exp->nes_numsecflavor; i++) { 3273 /* 3274 * The tests for privacy and integrity must be first, 3275 * since ND_GSS is set for everything but AUTH_SYS. 3276 */ 3277 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3278 (nd->nd_flag & ND_GSSPRIVACY)) 3279 return (0); 3280 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3281 (nd->nd_flag & ND_GSSINTEGRITY)) 3282 return (0); 3283 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3284 (nd->nd_flag & ND_GSS)) 3285 return (0); 3286 if (exp->nes_secflavors[i] == AUTH_SYS && 3287 (nd->nd_flag & ND_GSS) == 0) 3288 return (0); 3289 } 3290 return (1); 3291 } 3292 3293 /* 3294 * Calculate a hash value for the fid in a file handle. 3295 */ 3296 uint32_t 3297 nfsrv_hashfh(fhandle_t *fhp) 3298 { 3299 uint32_t hashval; 3300 3301 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3302 return (hashval); 3303 } 3304 3305 /* 3306 * Calculate a hash value for the sessionid. 3307 */ 3308 uint32_t 3309 nfsrv_hashsessionid(uint8_t *sessionid) 3310 { 3311 uint32_t hashval; 3312 3313 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3314 return (hashval); 3315 } 3316 3317 /* 3318 * Signal the userland master nfsd to backup the stable restart file. 3319 */ 3320 void 3321 nfsrv_backupstable(void) 3322 { 3323 struct proc *procp; 3324 3325 if (nfsd_master_proc != NULL) { 3326 procp = pfind(nfsd_master_pid); 3327 /* Try to make sure it is the correct process. */ 3328 if (procp == nfsd_master_proc && 3329 procp->p_stats->p_start.tv_sec == 3330 nfsd_master_start.tv_sec && 3331 procp->p_stats->p_start.tv_usec == 3332 nfsd_master_start.tv_usec && 3333 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3334 kern_psignal(procp, SIGUSR2); 3335 else 3336 nfsd_master_proc = NULL; 3337 3338 if (procp != NULL) 3339 PROC_UNLOCK(procp); 3340 } 3341 } 3342 3343 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3344 3345 /* 3346 * Called once to initialize data structures... 3347 */ 3348 static int 3349 nfsd_modevent(module_t mod, int type, void *data) 3350 { 3351 int error = 0, i; 3352 static int loaded = 0; 3353 3354 switch (type) { 3355 case MOD_LOAD: 3356 if (loaded) 3357 goto out; 3358 newnfs_portinit(); 3359 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3360 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 3361 MTX_DEF); 3362 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 3363 MTX_DEF); 3364 } 3365 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 3366 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 3367 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 3368 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3369 nfsrvd_initcache(); 3370 nfsd_init(); 3371 NFSD_LOCK(); 3372 nfsrvd_init(0); 3373 NFSD_UNLOCK(); 3374 nfsd_mntinit(); 3375 #ifdef VV_DISABLEDELEG 3376 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3377 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3378 #endif 3379 nfsd_call_servertimer = nfsrv_servertimer; 3380 nfsd_call_nfsd = nfssvc_nfsd; 3381 loaded = 1; 3382 break; 3383 3384 case MOD_UNLOAD: 3385 if (newnfs_numnfsd != 0) { 3386 error = EBUSY; 3387 break; 3388 } 3389 3390 #ifdef VV_DISABLEDELEG 3391 vn_deleg_ops.vndeleg_recall = NULL; 3392 vn_deleg_ops.vndeleg_disable = NULL; 3393 #endif 3394 nfsd_call_servertimer = NULL; 3395 nfsd_call_nfsd = NULL; 3396 3397 /* Clean out all NFSv4 state. */ 3398 nfsrv_throwawayallstate(curthread); 3399 3400 /* Clean the NFS server reply cache */ 3401 nfsrvd_cleancache(); 3402 3403 /* Free up the krpc server pool. */ 3404 if (nfsrvd_pool != NULL) 3405 svcpool_destroy(nfsrvd_pool); 3406 3407 /* and get rid of the locks */ 3408 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3409 mtx_destroy(&nfsrchash_table[i].mtx); 3410 mtx_destroy(&nfsrcahash_table[i].mtx); 3411 } 3412 mtx_destroy(&nfsrc_udpmtx); 3413 mtx_destroy(&nfs_v4root_mutex); 3414 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3415 for (i = 0; i < nfsrv_sessionhashsize; i++) 3416 mtx_destroy(&nfssessionhash[i].mtx); 3417 lockdestroy(&nfsv4root_mnt.mnt_explock); 3418 free(nfsclienthash, M_NFSDCLIENT); 3419 free(nfslockhash, M_NFSDLOCKFILE); 3420 free(nfssessionhash, M_NFSDSESSION); 3421 loaded = 0; 3422 break; 3423 default: 3424 error = EOPNOTSUPP; 3425 break; 3426 } 3427 3428 out: 3429 NFSEXITCODE(error); 3430 return (error); 3431 } 3432 static moduledata_t nfsd_mod = { 3433 "nfsd", 3434 nfsd_modevent, 3435 NULL, 3436 }; 3437 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3438 3439 /* So that loader and kldload(2) can find us, wherever we are.. */ 3440 MODULE_VERSION(nfsd, 1); 3441 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3442 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3443 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3444 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3445 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3446 3447
Indexes created Sun Sep 21 14:09:52 GMT 2025