nfs_nfsdport.c revision 1.1
1 /* $NetBSD: nfs_nfsdport.c,v 1.1 2013/09/30 07:19:57 dholland 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 255219 2013-09-05 00:09:56Z pjd "); */ 37 __RCSID("$NetBSD: nfs_nfsdport.c,v 1.1 2013/09/30 07:19:57 dholland Exp $"); 38 39 #include <sys/capability.h> 40 41 /* 42 * Functions that perform the vfs operations required by the routines in 43 * nfsd_serv.c. It is hoped that this change will make the server more 44 * portable. 45 */ 46 47 #include <fs/nfs/nfsport.h> 48 #include <sys/hash.h> 49 #include <sys/sysctl.h> 50 #include <nlm/nlm_prot.h> 51 #include <nlm/nlm.h> 52 53 FEATURE(nfsd, "NFSv4 server"); 54 55 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 56 extern int nfsrv_useacl; 57 extern int newnfs_numnfsd; 58 extern struct mount nfsv4root_mnt; 59 extern struct nfsrv_stablefirst nfsrv_stablefirst; 60 extern void (*nfsd_call_servertimer)(void); 61 extern SVCPOOL *nfsrvd_pool; 62 extern struct nfsv4lock nfsd_suspend_lock; 63 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 64 NFSDLOCKMUTEX; 65 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 66 struct mtx nfsrc_udpmtx; 67 struct mtx nfs_v4root_mutex; 68 struct nfsrvfh nfs_rootfh, nfs_pubfh; 69 int nfs_pubfhset = 0, nfs_rootfhset = 0; 70 struct proc *nfsd_master_proc = NULL; 71 static pid_t nfsd_master_pid = (pid_t)-1; 72 static char nfsd_master_comm[MAXCOMLEN + 1]; 73 static struct timeval nfsd_master_start; 74 static uint32_t nfsv4_sysid = 0; 75 76 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 77 struct ucred *); 78 79 int nfsrv_enable_crossmntpt = 1; 80 static int nfs_commit_blks; 81 static int nfs_commit_miss; 82 extern int nfsrv_issuedelegs; 83 extern int nfsrv_dolocallocks; 84 85 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server"); 86 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 87 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 88 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 89 0, ""); 90 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 91 0, ""); 92 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 93 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 94 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 95 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 96 97 #define MAX_REORDERED_RPC 16 98 #define NUM_HEURISTIC 1031 99 #define NHUSE_INIT 64 100 #define NHUSE_INC 16 101 #define NHUSE_MAX 2048 102 103 static struct nfsheur { 104 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 105 off_t nh_nextoff; /* next offset for sequential detection */ 106 int nh_use; /* use count for selection */ 107 int nh_seqcount; /* heuristic */ 108 } nfsheur[NUM_HEURISTIC]; 109 110 111 /* 112 * Heuristic to detect sequential operation. 113 */ 114 static struct nfsheur * 115 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 116 { 117 struct nfsheur *nh; 118 int hi, try; 119 120 /* Locate best candidate. */ 121 try = 32; 122 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 123 nh = &nfsheur[hi]; 124 while (try--) { 125 if (nfsheur[hi].nh_vp == vp) { 126 nh = &nfsheur[hi]; 127 break; 128 } 129 if (nfsheur[hi].nh_use > 0) 130 --nfsheur[hi].nh_use; 131 hi = (hi + 1) % NUM_HEURISTIC; 132 if (nfsheur[hi].nh_use < nh->nh_use) 133 nh = &nfsheur[hi]; 134 } 135 136 /* Initialize hint if this is a new file. */ 137 if (nh->nh_vp != vp) { 138 nh->nh_vp = vp; 139 nh->nh_nextoff = uio->uio_offset; 140 nh->nh_use = NHUSE_INIT; 141 if (uio->uio_offset == 0) 142 nh->nh_seqcount = 4; 143 else 144 nh->nh_seqcount = 1; 145 } 146 147 /* Calculate heuristic. */ 148 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 149 uio->uio_offset == nh->nh_nextoff) { 150 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 151 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 152 if (nh->nh_seqcount > IO_SEQMAX) 153 nh->nh_seqcount = IO_SEQMAX; 154 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 155 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 156 /* Probably a reordered RPC, leave seqcount alone. */ 157 } else if (nh->nh_seqcount > 1) { 158 nh->nh_seqcount /= 2; 159 } else { 160 nh->nh_seqcount = 0; 161 } 162 nh->nh_use += NHUSE_INC; 163 if (nh->nh_use > NHUSE_MAX) 164 nh->nh_use = NHUSE_MAX; 165 return (nh); 166 } 167 168 /* 169 * Get attributes into nfsvattr structure. 170 */ 171 int 172 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 173 struct thread *p, int vpislocked) 174 { 175 int error, lockedit = 0; 176 177 if (vpislocked == 0) { 178 /* 179 * When vpislocked == 0, the vnode is either exclusively 180 * locked by this thread or not locked by this thread. 181 * As such, shared lock it, if not exclusively locked. 182 */ 183 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 184 lockedit = 1; 185 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 186 } 187 } 188 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 189 if (lockedit != 0) 190 NFSVOPUNLOCK(vp, 0); 191 192 NFSEXITCODE(error); 193 return (error); 194 } 195 196 /* 197 * Get a file handle for a vnode. 198 */ 199 int 200 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 201 { 202 int error; 203 204 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 205 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 206 error = VOP_VPTOFH(vp, &fhp->fh_fid); 207 208 NFSEXITCODE(error); 209 return (error); 210 } 211 212 /* 213 * Perform access checking for vnodes obtained from file handles that would 214 * refer to files already opened by a Unix client. You cannot just use 215 * vn_writechk() and VOP_ACCESSX() for two reasons. 216 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 217 * case. 218 * 2 - The owner is to be given access irrespective of mode bits for some 219 * operations, so that processes that chmod after opening a file don't 220 * break. 221 */ 222 int 223 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 224 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 225 u_int32_t *supportedtypep) 226 { 227 struct vattr vattr; 228 int error = 0, getret = 0; 229 230 if (vpislocked == 0) { 231 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 232 error = EPERM; 233 goto out; 234 } 235 } 236 if (accmode & VWRITE) { 237 /* Just vn_writechk() changed to check rdonly */ 238 /* 239 * Disallow write attempts on read-only file systems; 240 * unless the file is a socket or a block or character 241 * device resident on the file system. 242 */ 243 if (NFSVNO_EXRDONLY(exp) || 244 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 245 switch (vp->v_type) { 246 case VREG: 247 case VDIR: 248 case VLNK: 249 error = EROFS; 250 default: 251 break; 252 } 253 } 254 /* 255 * If there's shared text associated with 256 * the inode, try to free it up once. If 257 * we fail, we can't allow writing. 258 */ 259 if (VOP_IS_TEXT(vp) && error == 0) 260 error = ETXTBSY; 261 } 262 if (error != 0) { 263 if (vpislocked == 0) 264 NFSVOPUNLOCK(vp, 0); 265 goto out; 266 } 267 268 /* 269 * Should the override still be applied when ACLs are enabled? 270 */ 271 error = VOP_ACCESSX(vp, accmode, cred, p); 272 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 273 /* 274 * Try again with VEXPLICIT_DENY, to see if the test for 275 * deletion is supported. 276 */ 277 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 278 if (error == 0) { 279 if (vp->v_type == VDIR) { 280 accmode &= ~(VDELETE | VDELETE_CHILD); 281 accmode |= VWRITE; 282 error = VOP_ACCESSX(vp, accmode, cred, p); 283 } else if (supportedtypep != NULL) { 284 *supportedtypep &= ~NFSACCESS_DELETE; 285 } 286 } 287 } 288 289 /* 290 * Allow certain operations for the owner (reads and writes 291 * on files that are already open). 292 */ 293 if (override != NFSACCCHK_NOOVERRIDE && 294 (error == EPERM || error == EACCES)) { 295 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 296 error = 0; 297 else if (override & NFSACCCHK_ALLOWOWNER) { 298 getret = VOP_GETATTR(vp, &vattr, cred); 299 if (getret == 0 && cred->cr_uid == vattr.va_uid) 300 error = 0; 301 } 302 } 303 if (vpislocked == 0) 304 NFSVOPUNLOCK(vp, 0); 305 306 out: 307 NFSEXITCODE(error); 308 return (error); 309 } 310 311 /* 312 * Set attribute(s) vnop. 313 */ 314 int 315 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 316 struct thread *p, struct nfsexstuff *exp) 317 { 318 int error; 319 320 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 321 NFSEXITCODE(error); 322 return (error); 323 } 324 325 /* 326 * Set up nameidata for a lookup() call and do it. 327 */ 328 int 329 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 330 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 331 struct vnode **retdirp) 332 { 333 struct componentname *cnp = &ndp->ni_cnd; 334 int i; 335 struct iovec aiov; 336 struct uio auio; 337 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 338 int error = 0, crossmnt; 339 char *cp; 340 341 *retdirp = NULL; 342 cnp->cn_nameptr = cnp->cn_pnbuf; 343 ndp->ni_strictrelative = 0; 344 /* 345 * Extract and set starting directory. 346 */ 347 if (dp->v_type != VDIR) { 348 if (islocked) 349 vput(dp); 350 else 351 vrele(dp); 352 nfsvno_relpathbuf(ndp); 353 error = ENOTDIR; 354 goto out1; 355 } 356 if (islocked) 357 NFSVOPUNLOCK(dp, 0); 358 VREF(dp); 359 *retdirp = dp; 360 if (NFSVNO_EXRDONLY(exp)) 361 cnp->cn_flags |= RDONLY; 362 ndp->ni_segflg = UIO_SYSSPACE; 363 crossmnt = 1; 364 365 if (nd->nd_flag & ND_PUBLOOKUP) { 366 ndp->ni_loopcnt = 0; 367 if (cnp->cn_pnbuf[0] == '/') { 368 vrele(dp); 369 /* 370 * Check for degenerate pathnames here, since lookup() 371 * panics on them. 372 */ 373 for (i = 1; i < ndp->ni_pathlen; i++) 374 if (cnp->cn_pnbuf[i] != '/') 375 break; 376 if (i == ndp->ni_pathlen) { 377 error = NFSERR_ACCES; 378 goto out; 379 } 380 dp = rootvnode; 381 VREF(dp); 382 } 383 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 384 (nd->nd_flag & ND_NFSV4) == 0) { 385 /* 386 * Only cross mount points for NFSv4 when doing a 387 * mount while traversing the file system above 388 * the mount point, unless nfsrv_enable_crossmntpt is set. 389 */ 390 cnp->cn_flags |= NOCROSSMOUNT; 391 crossmnt = 0; 392 } 393 394 /* 395 * Initialize for scan, set ni_startdir and bump ref on dp again 396 * because lookup() will dereference ni_startdir. 397 */ 398 399 cnp->cn_thread = p; 400 ndp->ni_startdir = dp; 401 ndp->ni_rootdir = rootvnode; 402 ndp->ni_topdir = NULL; 403 404 if (!lockleaf) 405 cnp->cn_flags |= LOCKLEAF; 406 for (;;) { 407 cnp->cn_nameptr = cnp->cn_pnbuf; 408 /* 409 * Call lookup() to do the real work. If an error occurs, 410 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 411 * we do not have to dereference anything before returning. 412 * In either case ni_startdir will be dereferenced and NULLed 413 * out. 414 */ 415 error = lookup(ndp); 416 if (error) 417 break; 418 419 /* 420 * Check for encountering a symbolic link. Trivial 421 * termination occurs if no symlink encountered. 422 */ 423 if ((cnp->cn_flags & ISSYMLINK) == 0) { 424 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 425 nfsvno_relpathbuf(ndp); 426 if (ndp->ni_vp && !lockleaf) 427 NFSVOPUNLOCK(ndp->ni_vp, 0); 428 break; 429 } 430 431 /* 432 * Validate symlink 433 */ 434 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 435 NFSVOPUNLOCK(ndp->ni_dvp, 0); 436 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 437 error = EINVAL; 438 goto badlink2; 439 } 440 441 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 442 error = ELOOP; 443 goto badlink2; 444 } 445 if (ndp->ni_pathlen > 1) 446 cp = uma_zalloc(namei_zone, M_WAITOK); 447 else 448 cp = cnp->cn_pnbuf; 449 aiov.iov_base = cp; 450 aiov.iov_len = MAXPATHLEN; 451 auio.uio_iov = &aiov; 452 auio.uio_iovcnt = 1; 453 auio.uio_offset = 0; 454 auio.uio_rw = UIO_READ; 455 auio.uio_segflg = UIO_SYSSPACE; 456 auio.uio_td = NULL; 457 auio.uio_resid = MAXPATHLEN; 458 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 459 if (error) { 460 badlink1: 461 if (ndp->ni_pathlen > 1) 462 uma_zfree(namei_zone, cp); 463 badlink2: 464 vrele(ndp->ni_dvp); 465 vput(ndp->ni_vp); 466 break; 467 } 468 linklen = MAXPATHLEN - auio.uio_resid; 469 if (linklen == 0) { 470 error = ENOENT; 471 goto badlink1; 472 } 473 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 474 error = ENAMETOOLONG; 475 goto badlink1; 476 } 477 478 /* 479 * Adjust or replace path 480 */ 481 if (ndp->ni_pathlen > 1) { 482 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 483 uma_zfree(namei_zone, cnp->cn_pnbuf); 484 cnp->cn_pnbuf = cp; 485 } else 486 cnp->cn_pnbuf[linklen] = '\0'; 487 ndp->ni_pathlen += linklen; 488 489 /* 490 * Cleanup refs for next loop and check if root directory 491 * should replace current directory. Normally ni_dvp 492 * becomes the new base directory and is cleaned up when 493 * we loop. Explicitly null pointers after invalidation 494 * to clarify operation. 495 */ 496 vput(ndp->ni_vp); 497 ndp->ni_vp = NULL; 498 499 if (cnp->cn_pnbuf[0] == '/') { 500 vrele(ndp->ni_dvp); 501 ndp->ni_dvp = ndp->ni_rootdir; 502 VREF(ndp->ni_dvp); 503 } 504 ndp->ni_startdir = ndp->ni_dvp; 505 ndp->ni_dvp = NULL; 506 } 507 if (!lockleaf) 508 cnp->cn_flags &= ~LOCKLEAF; 509 510 out: 511 if (error) { 512 nfsvno_relpathbuf(ndp); 513 ndp->ni_vp = NULL; 514 ndp->ni_dvp = NULL; 515 ndp->ni_startdir = NULL; 516 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 517 ndp->ni_dvp = NULL; 518 } 519 520 out1: 521 NFSEXITCODE2(error, nd); 522 return (error); 523 } 524 525 /* 526 * Set up a pathname buffer and return a pointer to it and, optionally 527 * set a hash pointer. 528 */ 529 void 530 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 531 { 532 struct componentname *cnp = &ndp->ni_cnd; 533 534 cnp->cn_flags |= (NOMACCHECK | HASBUF); 535 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 536 if (hashpp != NULL) 537 *hashpp = NULL; 538 *bufpp = cnp->cn_pnbuf; 539 } 540 541 /* 542 * Release the above path buffer, if not released by nfsvno_namei(). 543 */ 544 void 545 nfsvno_relpathbuf(struct nameidata *ndp) 546 { 547 548 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 549 panic("nfsrelpath"); 550 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 551 ndp->ni_cnd.cn_flags &= ~HASBUF; 552 } 553 554 /* 555 * Readlink vnode op into an mbuf list. 556 */ 557 int 558 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 559 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 560 { 561 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 562 struct iovec *ivp = iv; 563 struct uio io, *uiop = &io; 564 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 565 int i, len, tlen, error = 0; 566 567 len = 0; 568 i = 0; 569 while (len < NFS_MAXPATHLEN) { 570 NFSMGET(mp); 571 MCLGET(mp, M_WAITOK); 572 mp->m_len = NFSMSIZ(mp); 573 if (len == 0) { 574 mp3 = mp2 = mp; 575 } else { 576 mp2->m_next = mp; 577 mp2 = mp; 578 } 579 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 580 mp->m_len = NFS_MAXPATHLEN - len; 581 len = NFS_MAXPATHLEN; 582 } else { 583 len += mp->m_len; 584 } 585 ivp->iov_base = mtod(mp, caddr_t); 586 ivp->iov_len = mp->m_len; 587 i++; 588 ivp++; 589 } 590 uiop->uio_iov = iv; 591 uiop->uio_iovcnt = i; 592 uiop->uio_offset = 0; 593 uiop->uio_resid = len; 594 uiop->uio_rw = UIO_READ; 595 uiop->uio_segflg = UIO_SYSSPACE; 596 uiop->uio_td = NULL; 597 error = VOP_READLINK(vp, uiop, cred); 598 if (error) { 599 m_freem(mp3); 600 *lenp = 0; 601 goto out; 602 } 603 if (uiop->uio_resid > 0) { 604 len -= uiop->uio_resid; 605 tlen = NFSM_RNDUP(len); 606 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 607 } 608 *lenp = len; 609 *mpp = mp3; 610 *mpendp = mp; 611 612 out: 613 NFSEXITCODE(error); 614 return (error); 615 } 616 617 /* 618 * Read vnode op call into mbuf list. 619 */ 620 int 621 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 622 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 623 { 624 struct mbuf *m; 625 int i; 626 struct iovec *iv; 627 struct iovec *iv2; 628 int error = 0, len, left, siz, tlen, ioflag = 0; 629 struct mbuf *m2 = NULL, *m3; 630 struct uio io, *uiop = &io; 631 struct nfsheur *nh; 632 633 len = left = NFSM_RNDUP(cnt); 634 m3 = NULL; 635 /* 636 * Generate the mbuf list with the uio_iov ref. to it. 637 */ 638 i = 0; 639 while (left > 0) { 640 NFSMGET(m); 641 MCLGET(m, M_WAITOK); 642 m->m_len = 0; 643 siz = min(M_TRAILINGSPACE(m), left); 644 left -= siz; 645 i++; 646 if (m3) 647 m2->m_next = m; 648 else 649 m3 = m; 650 m2 = m; 651 } 652 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 653 M_TEMP, M_WAITOK); 654 uiop->uio_iov = iv2 = iv; 655 m = m3; 656 left = len; 657 i = 0; 658 while (left > 0) { 659 if (m == NULL) 660 panic("nfsvno_read iov"); 661 siz = min(M_TRAILINGSPACE(m), left); 662 if (siz > 0) { 663 iv->iov_base = mtod(m, caddr_t) + m->m_len; 664 iv->iov_len = siz; 665 m->m_len += siz; 666 left -= siz; 667 iv++; 668 i++; 669 } 670 m = m->m_next; 671 } 672 uiop->uio_iovcnt = i; 673 uiop->uio_offset = off; 674 uiop->uio_resid = len; 675 uiop->uio_rw = UIO_READ; 676 uiop->uio_segflg = UIO_SYSSPACE; 677 nh = nfsrv_sequential_heuristic(uiop, vp); 678 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 679 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 680 FREE((caddr_t)iv2, M_TEMP); 681 if (error) { 682 m_freem(m3); 683 *mpp = NULL; 684 goto out; 685 } 686 nh->nh_nextoff = uiop->uio_offset; 687 tlen = len - uiop->uio_resid; 688 cnt = cnt < tlen ? cnt : tlen; 689 tlen = NFSM_RNDUP(cnt); 690 if (tlen == 0) { 691 m_freem(m3); 692 m3 = NULL; 693 } else if (len != tlen || tlen != cnt) 694 nfsrv_adj(m3, len - tlen, tlen - cnt); 695 *mpp = m3; 696 *mpendp = m2; 697 698 out: 699 NFSEXITCODE(error); 700 return (error); 701 } 702 703 /* 704 * Write vnode op from an mbuf list. 705 */ 706 int 707 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 708 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 709 { 710 struct iovec *ivp; 711 int i, len; 712 struct iovec *iv; 713 int ioflags, error; 714 struct uio io, *uiop = &io; 715 struct nfsheur *nh; 716 717 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 718 M_WAITOK); 719 uiop->uio_iov = iv = ivp; 720 uiop->uio_iovcnt = cnt; 721 i = mtod(mp, caddr_t) + mp->m_len - cp; 722 len = retlen; 723 while (len > 0) { 724 if (mp == NULL) 725 panic("nfsvno_write"); 726 if (i > 0) { 727 i = min(i, len); 728 ivp->iov_base = cp; 729 ivp->iov_len = i; 730 ivp++; 731 len -= i; 732 } 733 mp = mp->m_next; 734 if (mp) { 735 i = mp->m_len; 736 cp = mtod(mp, caddr_t); 737 } 738 } 739 740 if (stable == NFSWRITE_UNSTABLE) 741 ioflags = IO_NODELOCKED; 742 else 743 ioflags = (IO_SYNC | IO_NODELOCKED); 744 uiop->uio_resid = retlen; 745 uiop->uio_rw = UIO_WRITE; 746 uiop->uio_segflg = UIO_SYSSPACE; 747 NFSUIOPROC(uiop, p); 748 uiop->uio_offset = off; 749 nh = nfsrv_sequential_heuristic(uiop, vp); 750 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 751 error = VOP_WRITE(vp, uiop, ioflags, cred); 752 if (error == 0) 753 nh->nh_nextoff = uiop->uio_offset; 754 FREE((caddr_t)iv, M_TEMP); 755 756 NFSEXITCODE(error); 757 return (error); 758 } 759 760 /* 761 * Common code for creating a regular file (plus special files for V2). 762 */ 763 int 764 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 765 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 766 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 767 { 768 u_quad_t tempsize; 769 int error; 770 771 error = nd->nd_repstat; 772 if (!error && ndp->ni_vp == NULL) { 773 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 774 vrele(ndp->ni_startdir); 775 error = VOP_CREATE(ndp->ni_dvp, 776 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 777 vput(ndp->ni_dvp); 778 nfsvno_relpathbuf(ndp); 779 if (!error) { 780 if (*exclusive_flagp) { 781 *exclusive_flagp = 0; 782 NFSVNO_ATTRINIT(nvap); 783 nvap->na_atime.tv_sec = cverf[0]; 784 nvap->na_atime.tv_nsec = cverf[1]; 785 error = VOP_SETATTR(ndp->ni_vp, 786 &nvap->na_vattr, nd->nd_cred); 787 } 788 } 789 /* 790 * NFS V2 Only. nfsrvd_mknod() does this for V3. 791 * (This implies, just get out on an error.) 792 */ 793 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 794 nvap->na_type == VFIFO) { 795 if (nvap->na_type == VCHR && rdev == 0xffffffff) 796 nvap->na_type = VFIFO; 797 if (nvap->na_type != VFIFO && 798 (error = priv_check_cred(nd->nd_cred, 799 PRIV_VFS_MKNOD_DEV, 0))) { 800 vrele(ndp->ni_startdir); 801 nfsvno_relpathbuf(ndp); 802 vput(ndp->ni_dvp); 803 goto out; 804 } 805 nvap->na_rdev = rdev; 806 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 807 &ndp->ni_cnd, &nvap->na_vattr); 808 vput(ndp->ni_dvp); 809 nfsvno_relpathbuf(ndp); 810 vrele(ndp->ni_startdir); 811 if (error) 812 goto out; 813 } else { 814 vrele(ndp->ni_startdir); 815 nfsvno_relpathbuf(ndp); 816 vput(ndp->ni_dvp); 817 error = ENXIO; 818 goto out; 819 } 820 *vpp = ndp->ni_vp; 821 } else { 822 /* 823 * Handle cases where error is already set and/or 824 * the file exists. 825 * 1 - clean up the lookup 826 * 2 - iff !error and na_size set, truncate it 827 */ 828 vrele(ndp->ni_startdir); 829 nfsvno_relpathbuf(ndp); 830 *vpp = ndp->ni_vp; 831 if (ndp->ni_dvp == *vpp) 832 vrele(ndp->ni_dvp); 833 else 834 vput(ndp->ni_dvp); 835 if (!error && nvap->na_size != VNOVAL) { 836 error = nfsvno_accchk(*vpp, VWRITE, 837 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 838 NFSACCCHK_VPISLOCKED, NULL); 839 if (!error) { 840 tempsize = nvap->na_size; 841 NFSVNO_ATTRINIT(nvap); 842 nvap->na_size = tempsize; 843 error = VOP_SETATTR(*vpp, 844 &nvap->na_vattr, nd->nd_cred); 845 } 846 } 847 if (error) 848 vput(*vpp); 849 } 850 851 out: 852 NFSEXITCODE(error); 853 return (error); 854 } 855 856 /* 857 * Do a mknod vnode op. 858 */ 859 int 860 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 861 struct thread *p) 862 { 863 int error = 0; 864 enum vtype vtyp; 865 866 vtyp = nvap->na_type; 867 /* 868 * Iff doesn't exist, create it. 869 */ 870 if (ndp->ni_vp) { 871 vrele(ndp->ni_startdir); 872 nfsvno_relpathbuf(ndp); 873 vput(ndp->ni_dvp); 874 vrele(ndp->ni_vp); 875 error = EEXIST; 876 goto out; 877 } 878 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 879 vrele(ndp->ni_startdir); 880 nfsvno_relpathbuf(ndp); 881 vput(ndp->ni_dvp); 882 error = NFSERR_BADTYPE; 883 goto out; 884 } 885 if (vtyp == VSOCK) { 886 vrele(ndp->ni_startdir); 887 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 888 &ndp->ni_cnd, &nvap->na_vattr); 889 vput(ndp->ni_dvp); 890 nfsvno_relpathbuf(ndp); 891 } else { 892 if (nvap->na_type != VFIFO && 893 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 894 vrele(ndp->ni_startdir); 895 nfsvno_relpathbuf(ndp); 896 vput(ndp->ni_dvp); 897 goto out; 898 } 899 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 900 &ndp->ni_cnd, &nvap->na_vattr); 901 vput(ndp->ni_dvp); 902 nfsvno_relpathbuf(ndp); 903 vrele(ndp->ni_startdir); 904 /* 905 * Since VOP_MKNOD returns the ni_vp, I can't 906 * see any reason to do the lookup. 907 */ 908 } 909 910 out: 911 NFSEXITCODE(error); 912 return (error); 913 } 914 915 /* 916 * Mkdir vnode op. 917 */ 918 int 919 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 920 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 921 { 922 int error = 0; 923 924 if (ndp->ni_vp != NULL) { 925 if (ndp->ni_dvp == ndp->ni_vp) 926 vrele(ndp->ni_dvp); 927 else 928 vput(ndp->ni_dvp); 929 vrele(ndp->ni_vp); 930 nfsvno_relpathbuf(ndp); 931 error = EEXIST; 932 goto out; 933 } 934 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 935 &nvap->na_vattr); 936 vput(ndp->ni_dvp); 937 nfsvno_relpathbuf(ndp); 938 939 out: 940 NFSEXITCODE(error); 941 return (error); 942 } 943 944 /* 945 * symlink vnode op. 946 */ 947 int 948 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 949 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 950 struct nfsexstuff *exp) 951 { 952 int error = 0; 953 954 if (ndp->ni_vp) { 955 vrele(ndp->ni_startdir); 956 nfsvno_relpathbuf(ndp); 957 if (ndp->ni_dvp == ndp->ni_vp) 958 vrele(ndp->ni_dvp); 959 else 960 vput(ndp->ni_dvp); 961 vrele(ndp->ni_vp); 962 error = EEXIST; 963 goto out; 964 } 965 966 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 967 &nvap->na_vattr, pathcp); 968 vput(ndp->ni_dvp); 969 vrele(ndp->ni_startdir); 970 nfsvno_relpathbuf(ndp); 971 /* 972 * Although FreeBSD still had the lookup code in 973 * it for 7/current, there doesn't seem to be any 974 * point, since VOP_SYMLINK() returns the ni_vp. 975 * Just vput it for v2. 976 */ 977 if (!not_v2 && !error) 978 vput(ndp->ni_vp); 979 980 out: 981 NFSEXITCODE(error); 982 return (error); 983 } 984 985 /* 986 * Parse symbolic link arguments. 987 * This function has an ugly side effect. It will MALLOC() an area for 988 * the symlink and set iov_base to point to it, only if it succeeds. 989 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 990 * be FREE'd later. 991 */ 992 int 993 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 994 struct thread *p, char **pathcpp, int *lenp) 995 { 996 u_int32_t *tl; 997 char *pathcp = NULL; 998 int error = 0, len; 999 struct nfsv2_sattr *sp; 1000 1001 *pathcpp = NULL; 1002 *lenp = 0; 1003 if ((nd->nd_flag & ND_NFSV3) && 1004 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p))) 1005 goto nfsmout; 1006 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1007 len = fxdr_unsigned(int, *tl); 1008 if (len > NFS_MAXPATHLEN || len <= 0) { 1009 error = EBADRPC; 1010 goto nfsmout; 1011 } 1012 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1013 error = nfsrv_mtostr(nd, pathcp, len); 1014 if (error) 1015 goto nfsmout; 1016 if (nd->nd_flag & ND_NFSV2) { 1017 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1018 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1019 } 1020 *pathcpp = pathcp; 1021 *lenp = len; 1022 NFSEXITCODE2(0, nd); 1023 return (0); 1024 nfsmout: 1025 if (pathcp) 1026 free(pathcp, M_TEMP); 1027 NFSEXITCODE2(error, nd); 1028 return (error); 1029 } 1030 1031 /* 1032 * Remove a non-directory object. 1033 */ 1034 int 1035 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1036 struct thread *p, struct nfsexstuff *exp) 1037 { 1038 struct vnode *vp; 1039 int error = 0; 1040 1041 vp = ndp->ni_vp; 1042 if (vp->v_type == VDIR) 1043 error = NFSERR_ISDIR; 1044 else if (is_v4) 1045 error = nfsrv_checkremove(vp, 1, p); 1046 if (!error) 1047 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1048 if (ndp->ni_dvp == vp) 1049 vrele(ndp->ni_dvp); 1050 else 1051 vput(ndp->ni_dvp); 1052 vput(vp); 1053 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1054 nfsvno_relpathbuf(ndp); 1055 NFSEXITCODE(error); 1056 return (error); 1057 } 1058 1059 /* 1060 * Remove a directory. 1061 */ 1062 int 1063 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1064 struct thread *p, struct nfsexstuff *exp) 1065 { 1066 struct vnode *vp; 1067 int error = 0; 1068 1069 vp = ndp->ni_vp; 1070 if (vp->v_type != VDIR) { 1071 error = ENOTDIR; 1072 goto out; 1073 } 1074 /* 1075 * No rmdir "." please. 1076 */ 1077 if (ndp->ni_dvp == vp) { 1078 error = EINVAL; 1079 goto out; 1080 } 1081 /* 1082 * The root of a mounted filesystem cannot be deleted. 1083 */ 1084 if (vp->v_vflag & VV_ROOT) 1085 error = EBUSY; 1086 out: 1087 if (!error) 1088 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1089 if (ndp->ni_dvp == vp) 1090 vrele(ndp->ni_dvp); 1091 else 1092 vput(ndp->ni_dvp); 1093 vput(vp); 1094 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1095 nfsvno_relpathbuf(ndp); 1096 NFSEXITCODE(error); 1097 return (error); 1098 } 1099 1100 /* 1101 * Rename vnode op. 1102 */ 1103 int 1104 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1105 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1106 { 1107 struct vnode *fvp, *tvp, *tdvp; 1108 int error = 0; 1109 1110 fvp = fromndp->ni_vp; 1111 if (ndstat) { 1112 vrele(fromndp->ni_dvp); 1113 vrele(fvp); 1114 error = ndstat; 1115 goto out1; 1116 } 1117 tdvp = tondp->ni_dvp; 1118 tvp = tondp->ni_vp; 1119 if (tvp != NULL) { 1120 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1121 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1122 goto out; 1123 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1124 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1125 goto out; 1126 } 1127 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1128 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1129 goto out; 1130 } 1131 1132 /* 1133 * A rename to '.' or '..' results in a prematurely 1134 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1135 * here. 1136 */ 1137 if ((tondp->ni_cnd.cn_namelen == 1 && 1138 tondp->ni_cnd.cn_nameptr[0] == '.') || 1139 (tondp->ni_cnd.cn_namelen == 2 && 1140 tondp->ni_cnd.cn_nameptr[0] == '.' && 1141 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1142 error = EINVAL; 1143 goto out; 1144 } 1145 } 1146 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1147 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1148 goto out; 1149 } 1150 if (fvp->v_mount != tdvp->v_mount) { 1151 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1152 goto out; 1153 } 1154 if (fvp == tdvp) { 1155 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1156 goto out; 1157 } 1158 if (fvp == tvp) { 1159 /* 1160 * If source and destination are the same, there is nothing to 1161 * do. Set error to -1 to indicate this. 1162 */ 1163 error = -1; 1164 goto out; 1165 } 1166 if (ndflag & ND_NFSV4) { 1167 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1168 error = nfsrv_checkremove(fvp, 0, p); 1169 NFSVOPUNLOCK(fvp, 0); 1170 } else 1171 error = EPERM; 1172 if (tvp && !error) 1173 error = nfsrv_checkremove(tvp, 1, p); 1174 } else { 1175 /* 1176 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1177 * that the NFSv4 client won't be confused by the rename. 1178 * Since nfsd_recalldelegation() can only be called on an 1179 * unlocked vnode at this point and fvp is the file that will 1180 * still exist after the rename, just do fvp. 1181 */ 1182 nfsd_recalldelegation(fvp, p); 1183 } 1184 out: 1185 if (!error) { 1186 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1187 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1188 &tondp->ni_cnd); 1189 } else { 1190 if (tdvp == tvp) 1191 vrele(tdvp); 1192 else 1193 vput(tdvp); 1194 if (tvp) 1195 vput(tvp); 1196 vrele(fromndp->ni_dvp); 1197 vrele(fvp); 1198 if (error == -1) 1199 error = 0; 1200 } 1201 vrele(tondp->ni_startdir); 1202 nfsvno_relpathbuf(tondp); 1203 out1: 1204 vrele(fromndp->ni_startdir); 1205 nfsvno_relpathbuf(fromndp); 1206 NFSEXITCODE(error); 1207 return (error); 1208 } 1209 1210 /* 1211 * Link vnode op. 1212 */ 1213 int 1214 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1215 struct thread *p, struct nfsexstuff *exp) 1216 { 1217 struct vnode *xp; 1218 int error = 0; 1219 1220 xp = ndp->ni_vp; 1221 if (xp != NULL) { 1222 error = EEXIST; 1223 } else { 1224 xp = ndp->ni_dvp; 1225 if (vp->v_mount != xp->v_mount) 1226 error = EXDEV; 1227 } 1228 if (!error) { 1229 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1230 if ((vp->v_iflag & VI_DOOMED) == 0) 1231 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1232 else 1233 error = EPERM; 1234 if (ndp->ni_dvp == vp) 1235 vrele(ndp->ni_dvp); 1236 else 1237 vput(ndp->ni_dvp); 1238 NFSVOPUNLOCK(vp, 0); 1239 } else { 1240 if (ndp->ni_dvp == ndp->ni_vp) 1241 vrele(ndp->ni_dvp); 1242 else 1243 vput(ndp->ni_dvp); 1244 if (ndp->ni_vp) 1245 vrele(ndp->ni_vp); 1246 } 1247 nfsvno_relpathbuf(ndp); 1248 NFSEXITCODE(error); 1249 return (error); 1250 } 1251 1252 /* 1253 * Do the fsync() appropriate for the commit. 1254 */ 1255 int 1256 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1257 struct thread *td) 1258 { 1259 int error = 0; 1260 1261 /* 1262 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1263 * file is done. At this time VOP_FSYNC does not accept offset and 1264 * byte count parameters so call VOP_FSYNC the whole file for now. 1265 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1266 */ 1267 if (cnt == 0 || cnt > MAX_COMMIT_COUNT) { 1268 /* 1269 * Give up and do the whole thing 1270 */ 1271 if (vp->v_object && 1272 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1273 VM_OBJECT_WLOCK(vp->v_object); 1274 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1275 VM_OBJECT_WUNLOCK(vp->v_object); 1276 } 1277 error = VOP_FSYNC(vp, MNT_WAIT, td); 1278 } else { 1279 /* 1280 * Locate and synchronously write any buffers that fall 1281 * into the requested range. Note: we are assuming that 1282 * f_iosize is a power of 2. 1283 */ 1284 int iosize = vp->v_mount->mnt_stat.f_iosize; 1285 int iomask = iosize - 1; 1286 struct bufobj *bo; 1287 daddr_t lblkno; 1288 1289 /* 1290 * Align to iosize boundry, super-align to page boundry. 1291 */ 1292 if (off & iomask) { 1293 cnt += off & iomask; 1294 off &= ~(u_quad_t)iomask; 1295 } 1296 if (off & PAGE_MASK) { 1297 cnt += off & PAGE_MASK; 1298 off &= ~(u_quad_t)PAGE_MASK; 1299 } 1300 lblkno = off / iosize; 1301 1302 if (vp->v_object && 1303 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1304 VM_OBJECT_WLOCK(vp->v_object); 1305 vm_object_page_clean(vp->v_object, off, off + cnt, 1306 OBJPC_SYNC); 1307 VM_OBJECT_WUNLOCK(vp->v_object); 1308 } 1309 1310 bo = &vp->v_bufobj; 1311 BO_LOCK(bo); 1312 while (cnt > 0) { 1313 struct buf *bp; 1314 1315 /* 1316 * If we have a buffer and it is marked B_DELWRI we 1317 * have to lock and write it. Otherwise the prior 1318 * write is assumed to have already been committed. 1319 * 1320 * gbincore() can return invalid buffers now so we 1321 * have to check that bit as well (though B_DELWRI 1322 * should not be set if B_INVAL is set there could be 1323 * a race here since we haven't locked the buffer). 1324 */ 1325 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1326 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1327 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1328 BO_LOCK(bo); 1329 continue; /* retry */ 1330 } 1331 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1332 B_DELWRI) { 1333 bremfree(bp); 1334 bp->b_flags &= ~B_ASYNC; 1335 bwrite(bp); 1336 ++nfs_commit_miss; 1337 } else 1338 BUF_UNLOCK(bp); 1339 BO_LOCK(bo); 1340 } 1341 ++nfs_commit_blks; 1342 if (cnt < iosize) 1343 break; 1344 cnt -= iosize; 1345 ++lblkno; 1346 } 1347 BO_UNLOCK(bo); 1348 } 1349 NFSEXITCODE(error); 1350 return (error); 1351 } 1352 1353 /* 1354 * Statfs vnode op. 1355 */ 1356 int 1357 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1358 { 1359 int error; 1360 1361 error = VFS_STATFS(vp->v_mount, sf); 1362 if (error == 0) { 1363 /* 1364 * Since NFS handles these values as unsigned on the 1365 * wire, there is no way to represent negative values, 1366 * so set them to 0. Without this, they will appear 1367 * to be very large positive values for clients like 1368 * Solaris10. 1369 */ 1370 if (sf->f_bavail < 0) 1371 sf->f_bavail = 0; 1372 if (sf->f_ffree < 0) 1373 sf->f_ffree = 0; 1374 } 1375 NFSEXITCODE(error); 1376 return (error); 1377 } 1378 1379 /* 1380 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1381 * must handle nfsrv_opencheck() calls after any other access checks. 1382 */ 1383 void 1384 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1385 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1386 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1387 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1388 struct nfsexstuff *exp, struct vnode **vpp) 1389 { 1390 struct vnode *vp = NULL; 1391 u_quad_t tempsize; 1392 struct nfsexstuff nes; 1393 1394 if (ndp->ni_vp == NULL) 1395 nd->nd_repstat = nfsrv_opencheck(clientid, 1396 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1397 if (!nd->nd_repstat) { 1398 if (ndp->ni_vp == NULL) { 1399 vrele(ndp->ni_startdir); 1400 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1401 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1402 vput(ndp->ni_dvp); 1403 nfsvno_relpathbuf(ndp); 1404 if (!nd->nd_repstat) { 1405 if (*exclusive_flagp) { 1406 *exclusive_flagp = 0; 1407 NFSVNO_ATTRINIT(nvap); 1408 nvap->na_atime.tv_sec = cverf[0]; 1409 nvap->na_atime.tv_nsec = cverf[1]; 1410 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1411 &nvap->na_vattr, cred); 1412 } else { 1413 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1414 aclp, p, attrbitp, exp); 1415 } 1416 } 1417 vp = ndp->ni_vp; 1418 } else { 1419 if (ndp->ni_startdir) 1420 vrele(ndp->ni_startdir); 1421 nfsvno_relpathbuf(ndp); 1422 vp = ndp->ni_vp; 1423 if (create == NFSV4OPEN_CREATE) { 1424 if (ndp->ni_dvp == vp) 1425 vrele(ndp->ni_dvp); 1426 else 1427 vput(ndp->ni_dvp); 1428 } 1429 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1430 if (ndp->ni_cnd.cn_flags & RDONLY) 1431 NFSVNO_SETEXRDONLY(&nes); 1432 else 1433 NFSVNO_EXINIT(&nes); 1434 nd->nd_repstat = nfsvno_accchk(vp, 1435 VWRITE, cred, &nes, p, 1436 NFSACCCHK_NOOVERRIDE, 1437 NFSACCCHK_VPISLOCKED, NULL); 1438 nd->nd_repstat = nfsrv_opencheck(clientid, 1439 stateidp, stp, vp, nd, p, nd->nd_repstat); 1440 if (!nd->nd_repstat) { 1441 tempsize = nvap->na_size; 1442 NFSVNO_ATTRINIT(nvap); 1443 nvap->na_size = tempsize; 1444 nd->nd_repstat = VOP_SETATTR(vp, 1445 &nvap->na_vattr, cred); 1446 } 1447 } else if (vp->v_type == VREG) { 1448 nd->nd_repstat = nfsrv_opencheck(clientid, 1449 stateidp, stp, vp, nd, p, nd->nd_repstat); 1450 } 1451 } 1452 } else { 1453 if (ndp->ni_cnd.cn_flags & HASBUF) 1454 nfsvno_relpathbuf(ndp); 1455 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1456 vrele(ndp->ni_startdir); 1457 if (ndp->ni_dvp == ndp->ni_vp) 1458 vrele(ndp->ni_dvp); 1459 else 1460 vput(ndp->ni_dvp); 1461 if (ndp->ni_vp) 1462 vput(ndp->ni_vp); 1463 } 1464 } 1465 *vpp = vp; 1466 1467 NFSEXITCODE2(0, nd); 1468 } 1469 1470 /* 1471 * Updates the file rev and sets the mtime and ctime 1472 * to the current clock time, returning the va_filerev and va_Xtime 1473 * values. 1474 */ 1475 void 1476 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1477 struct ucred *cred, struct thread *p) 1478 { 1479 struct vattr va; 1480 1481 VATTR_NULL(&va); 1482 vfs_timestamp(&va.va_mtime); 1483 (void) VOP_SETATTR(vp, &va, cred); 1484 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1485 } 1486 1487 /* 1488 * Glue routine to nfsv4_fillattr(). 1489 */ 1490 int 1491 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1492 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1493 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1494 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1495 { 1496 int error; 1497 1498 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1499 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1500 mounted_on_fileno); 1501 NFSEXITCODE2(0, nd); 1502 return (error); 1503 } 1504 1505 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1506 /* 1507 * nfs readdir service 1508 * - mallocs what it thinks is enough to read 1509 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1510 * - calls VOP_READDIR() 1511 * - loops around building the reply 1512 * if the output generated exceeds count break out of loop 1513 * The NFSM_CLGET macro is used here so that the reply will be packed 1514 * tightly in mbuf clusters. 1515 * - it trims out records with d_fileno == 0 1516 * this doesn't matter for Unix clients, but they might confuse clients 1517 * for other os'. 1518 * - it trims out records with d_type == DT_WHT 1519 * these cannot be seen through NFS (unless we extend the protocol) 1520 * The alternate call nfsrvd_readdirplus() does lookups as well. 1521 * PS: The NFS protocol spec. does not clarify what the "count" byte 1522 * argument is a count of.. just name strings and file id's or the 1523 * entire reply rpc or ... 1524 * I tried just file name and id sizes and it confused the Sun client, 1525 * so I am using the full rpc size now. The "paranoia.." comment refers 1526 * to including the status longwords that are not a part of the dir. 1527 * "entry" structures, but are in the rpc. 1528 */ 1529 int 1530 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1531 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1532 { 1533 struct dirent *dp; 1534 u_int32_t *tl; 1535 int dirlen; 1536 char *cpos, *cend, *rbuf; 1537 struct nfsvattr at; 1538 int nlen, error = 0, getret = 1; 1539 int siz, cnt, fullsiz, eofflag, ncookies; 1540 u_int64_t off, toff, verf; 1541 u_long *cookies = NULL, *cookiep; 1542 struct uio io; 1543 struct iovec iv; 1544 int not_zfs; 1545 1546 if (nd->nd_repstat) { 1547 nfsrv_postopattr(nd, getret, &at); 1548 goto out; 1549 } 1550 if (nd->nd_flag & ND_NFSV2) { 1551 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1552 off = fxdr_unsigned(u_quad_t, *tl++); 1553 } else { 1554 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1555 off = fxdr_hyper(tl); 1556 tl += 2; 1557 verf = fxdr_hyper(tl); 1558 tl += 2; 1559 } 1560 toff = off; 1561 cnt = fxdr_unsigned(int, *tl); 1562 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1563 cnt = NFS_SRVMAXDATA(nd); 1564 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1565 fullsiz = siz; 1566 if (nd->nd_flag & ND_NFSV3) { 1567 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1568 p, 1); 1569 #if 0 1570 /* 1571 * va_filerev is not sufficient as a cookie verifier, 1572 * since it is not supposed to change when entries are 1573 * removed/added unless that offset cookies returned to 1574 * the client are no longer valid. 1575 */ 1576 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1577 nd->nd_repstat = NFSERR_BAD_COOKIE; 1578 #endif 1579 } 1580 if (!nd->nd_repstat && vp->v_type != VDIR) 1581 nd->nd_repstat = NFSERR_NOTDIR; 1582 if (nd->nd_repstat == 0 && cnt == 0) { 1583 if (nd->nd_flag & ND_NFSV2) 1584 /* NFSv2 does not have NFSERR_TOOSMALL */ 1585 nd->nd_repstat = EPERM; 1586 else 1587 nd->nd_repstat = NFSERR_TOOSMALL; 1588 } 1589 if (!nd->nd_repstat) 1590 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1591 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1592 NFSACCCHK_VPISLOCKED, NULL); 1593 if (nd->nd_repstat) { 1594 vput(vp); 1595 if (nd->nd_flag & ND_NFSV3) 1596 nfsrv_postopattr(nd, getret, &at); 1597 goto out; 1598 } 1599 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1600 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1601 again: 1602 eofflag = 0; 1603 if (cookies) { 1604 free((caddr_t)cookies, M_TEMP); 1605 cookies = NULL; 1606 } 1607 1608 iv.iov_base = rbuf; 1609 iv.iov_len = siz; 1610 io.uio_iov = &iv; 1611 io.uio_iovcnt = 1; 1612 io.uio_offset = (off_t)off; 1613 io.uio_resid = siz; 1614 io.uio_segflg = UIO_SYSSPACE; 1615 io.uio_rw = UIO_READ; 1616 io.uio_td = NULL; 1617 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1618 &cookies); 1619 off = (u_int64_t)io.uio_offset; 1620 if (io.uio_resid) 1621 siz -= io.uio_resid; 1622 1623 if (!cookies && !nd->nd_repstat) 1624 nd->nd_repstat = NFSERR_PERM; 1625 if (nd->nd_flag & ND_NFSV3) { 1626 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1627 if (!nd->nd_repstat) 1628 nd->nd_repstat = getret; 1629 } 1630 1631 /* 1632 * Handles the failed cases. nd->nd_repstat == 0 past here. 1633 */ 1634 if (nd->nd_repstat) { 1635 vput(vp); 1636 free((caddr_t)rbuf, M_TEMP); 1637 if (cookies) 1638 free((caddr_t)cookies, M_TEMP); 1639 if (nd->nd_flag & ND_NFSV3) 1640 nfsrv_postopattr(nd, getret, &at); 1641 goto out; 1642 } 1643 /* 1644 * If nothing read, return eof 1645 * rpc reply 1646 */ 1647 if (siz == 0) { 1648 vput(vp); 1649 if (nd->nd_flag & ND_NFSV2) { 1650 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1651 } else { 1652 nfsrv_postopattr(nd, getret, &at); 1653 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1654 txdr_hyper(at.na_filerev, tl); 1655 tl += 2; 1656 } 1657 *tl++ = newnfs_false; 1658 *tl = newnfs_true; 1659 FREE((caddr_t)rbuf, M_TEMP); 1660 FREE((caddr_t)cookies, M_TEMP); 1661 goto out; 1662 } 1663 1664 /* 1665 * Check for degenerate cases of nothing useful read. 1666 * If so go try again 1667 */ 1668 cpos = rbuf; 1669 cend = rbuf + siz; 1670 dp = (struct dirent *)cpos; 1671 cookiep = cookies; 1672 1673 /* 1674 * For some reason FreeBSD's ufs_readdir() chooses to back the 1675 * directory offset up to a block boundary, so it is necessary to 1676 * skip over the records that precede the requested offset. This 1677 * requires the assumption that file offset cookies monotonically 1678 * increase. 1679 * Since the offset cookies don't monotonically increase for ZFS, 1680 * this is not done when ZFS is the file system. 1681 */ 1682 while (cpos < cend && ncookies > 0 && 1683 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1684 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) { 1685 cpos += dp->d_reclen; 1686 dp = (struct dirent *)cpos; 1687 cookiep++; 1688 ncookies--; 1689 } 1690 if (cpos >= cend || ncookies == 0) { 1691 siz = fullsiz; 1692 toff = off; 1693 goto again; 1694 } 1695 vput(vp); 1696 1697 /* 1698 * dirlen is the size of the reply, including all XDR and must 1699 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1700 * if the XDR should be included in "count", but to be safe, we do. 1701 * (Include the two booleans at the end of the reply in dirlen now.) 1702 */ 1703 if (nd->nd_flag & ND_NFSV3) { 1704 nfsrv_postopattr(nd, getret, &at); 1705 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1706 txdr_hyper(at.na_filerev, tl); 1707 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1708 } else { 1709 dirlen = 2 * NFSX_UNSIGNED; 1710 } 1711 1712 /* Loop through the records and build reply */ 1713 while (cpos < cend && ncookies > 0) { 1714 nlen = dp->d_namlen; 1715 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1716 nlen <= NFS_MAXNAMLEN) { 1717 if (nd->nd_flag & ND_NFSV3) 1718 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1719 else 1720 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1721 if (dirlen > cnt) { 1722 eofflag = 0; 1723 break; 1724 } 1725 1726 /* 1727 * Build the directory record xdr from 1728 * the dirent entry. 1729 */ 1730 if (nd->nd_flag & ND_NFSV3) { 1731 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1732 *tl++ = newnfs_true; 1733 *tl++ = 0; 1734 } else { 1735 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1736 *tl++ = newnfs_true; 1737 } 1738 *tl = txdr_unsigned(dp->d_fileno); 1739 (void) nfsm_strtom(nd, dp->d_name, nlen); 1740 if (nd->nd_flag & ND_NFSV3) { 1741 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1742 *tl++ = 0; 1743 } else 1744 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1745 *tl = txdr_unsigned(*cookiep); 1746 } 1747 cpos += dp->d_reclen; 1748 dp = (struct dirent *)cpos; 1749 cookiep++; 1750 ncookies--; 1751 } 1752 if (cpos < cend) 1753 eofflag = 0; 1754 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1755 *tl++ = newnfs_false; 1756 if (eofflag) 1757 *tl = newnfs_true; 1758 else 1759 *tl = newnfs_false; 1760 FREE((caddr_t)rbuf, M_TEMP); 1761 FREE((caddr_t)cookies, M_TEMP); 1762 1763 out: 1764 NFSEXITCODE2(0, nd); 1765 return (0); 1766 nfsmout: 1767 vput(vp); 1768 NFSEXITCODE2(error, nd); 1769 return (error); 1770 } 1771 1772 /* 1773 * Readdirplus for V3 and Readdir for V4. 1774 */ 1775 int 1776 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1777 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1778 { 1779 struct dirent *dp; 1780 u_int32_t *tl; 1781 int dirlen; 1782 char *cpos, *cend, *rbuf; 1783 struct vnode *nvp; 1784 fhandle_t nfh; 1785 struct nfsvattr nva, at, *nvap = &nva; 1786 struct mbuf *mb0, *mb1; 1787 struct nfsreferral *refp; 1788 int nlen, r, error = 0, getret = 1, usevget = 1; 1789 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1790 caddr_t bpos0, bpos1; 1791 u_int64_t off, toff, verf; 1792 u_long *cookies = NULL, *cookiep; 1793 nfsattrbit_t attrbits, rderrbits, savbits; 1794 struct uio io; 1795 struct iovec iv; 1796 struct componentname cn; 1797 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls; 1798 struct mount *mp, *new_mp; 1799 uint64_t mounted_on_fileno; 1800 1801 if (nd->nd_repstat) { 1802 nfsrv_postopattr(nd, getret, &at); 1803 goto out; 1804 } 1805 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1806 off = fxdr_hyper(tl); 1807 toff = off; 1808 tl += 2; 1809 verf = fxdr_hyper(tl); 1810 tl += 2; 1811 siz = fxdr_unsigned(int, *tl++); 1812 cnt = fxdr_unsigned(int, *tl); 1813 1814 /* 1815 * Use the server's maximum data transfer size as the upper bound 1816 * on reply datalen. 1817 */ 1818 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1819 cnt = NFS_SRVMAXDATA(nd); 1820 1821 /* 1822 * siz is a "hint" of how much directory information (name, fileid, 1823 * cookie) should be in the reply. At least one client "hints" 0, 1824 * so I set it to cnt for that case. I also round it up to the 1825 * next multiple of DIRBLKSIZ. 1826 */ 1827 if (siz <= 0) 1828 siz = cnt; 1829 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1830 1831 if (nd->nd_flag & ND_NFSV4) { 1832 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1833 if (error) 1834 goto nfsmout; 1835 NFSSET_ATTRBIT(&savbits, &attrbits); 1836 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1837 NFSZERO_ATTRBIT(&rderrbits); 1838 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1839 } else { 1840 NFSZERO_ATTRBIT(&attrbits); 1841 } 1842 fullsiz = siz; 1843 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1844 if (!nd->nd_repstat) { 1845 if (off && verf != at.na_filerev) { 1846 /* 1847 * va_filerev is not sufficient as a cookie verifier, 1848 * since it is not supposed to change when entries are 1849 * removed/added unless that offset cookies returned to 1850 * the client are no longer valid. 1851 */ 1852 #if 0 1853 if (nd->nd_flag & ND_NFSV4) { 1854 nd->nd_repstat = NFSERR_NOTSAME; 1855 } else { 1856 nd->nd_repstat = NFSERR_BAD_COOKIE; 1857 } 1858 #endif 1859 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1860 nd->nd_repstat = NFSERR_BAD_COOKIE; 1861 } 1862 } 1863 if (!nd->nd_repstat && vp->v_type != VDIR) 1864 nd->nd_repstat = NFSERR_NOTDIR; 1865 if (!nd->nd_repstat && cnt == 0) 1866 nd->nd_repstat = NFSERR_TOOSMALL; 1867 if (!nd->nd_repstat) 1868 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1869 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1870 NFSACCCHK_VPISLOCKED, NULL); 1871 if (nd->nd_repstat) { 1872 vput(vp); 1873 if (nd->nd_flag & ND_NFSV3) 1874 nfsrv_postopattr(nd, getret, &at); 1875 goto out; 1876 } 1877 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1878 1879 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1880 again: 1881 eofflag = 0; 1882 if (cookies) { 1883 free((caddr_t)cookies, M_TEMP); 1884 cookies = NULL; 1885 } 1886 1887 iv.iov_base = rbuf; 1888 iv.iov_len = siz; 1889 io.uio_iov = &iv; 1890 io.uio_iovcnt = 1; 1891 io.uio_offset = (off_t)off; 1892 io.uio_resid = siz; 1893 io.uio_segflg = UIO_SYSSPACE; 1894 io.uio_rw = UIO_READ; 1895 io.uio_td = NULL; 1896 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1897 &cookies); 1898 off = (u_int64_t)io.uio_offset; 1899 if (io.uio_resid) 1900 siz -= io.uio_resid; 1901 1902 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1903 1904 if (!cookies && !nd->nd_repstat) 1905 nd->nd_repstat = NFSERR_PERM; 1906 if (!nd->nd_repstat) 1907 nd->nd_repstat = getret; 1908 if (nd->nd_repstat) { 1909 vput(vp); 1910 if (cookies) 1911 free((caddr_t)cookies, M_TEMP); 1912 free((caddr_t)rbuf, M_TEMP); 1913 if (nd->nd_flag & ND_NFSV3) 1914 nfsrv_postopattr(nd, getret, &at); 1915 goto out; 1916 } 1917 /* 1918 * If nothing read, return eof 1919 * rpc reply 1920 */ 1921 if (siz == 0) { 1922 vput(vp); 1923 if (nd->nd_flag & ND_NFSV3) 1924 nfsrv_postopattr(nd, getret, &at); 1925 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1926 txdr_hyper(at.na_filerev, tl); 1927 tl += 2; 1928 *tl++ = newnfs_false; 1929 *tl = newnfs_true; 1930 free((caddr_t)cookies, M_TEMP); 1931 free((caddr_t)rbuf, M_TEMP); 1932 goto out; 1933 } 1934 1935 /* 1936 * Check for degenerate cases of nothing useful read. 1937 * If so go try again 1938 */ 1939 cpos = rbuf; 1940 cend = rbuf + siz; 1941 dp = (struct dirent *)cpos; 1942 cookiep = cookies; 1943 1944 /* 1945 * For some reason FreeBSD's ufs_readdir() chooses to back the 1946 * directory offset up to a block boundary, so it is necessary to 1947 * skip over the records that precede the requested offset. This 1948 * requires the assumption that file offset cookies monotonically 1949 * increase. 1950 * Since the offset cookies don't monotonically increase for ZFS, 1951 * this is not done when ZFS is the file system. 1952 */ 1953 while (cpos < cend && ncookies > 0 && 1954 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1955 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) || 1956 ((nd->nd_flag & ND_NFSV4) && 1957 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1958 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1959 cpos += dp->d_reclen; 1960 dp = (struct dirent *)cpos; 1961 cookiep++; 1962 ncookies--; 1963 } 1964 if (cpos >= cend || ncookies == 0) { 1965 siz = fullsiz; 1966 toff = off; 1967 goto again; 1968 } 1969 1970 /* 1971 * Busy the file system so that the mount point won't go away 1972 * and, as such, VFS_VGET() can be used safely. 1973 */ 1974 mp = vp->v_mount; 1975 vfs_ref(mp); 1976 NFSVOPUNLOCK(vp, 0); 1977 nd->nd_repstat = vfs_busy(mp, 0); 1978 vfs_rel(mp); 1979 if (nd->nd_repstat != 0) { 1980 vrele(vp); 1981 free(cookies, M_TEMP); 1982 free(rbuf, M_TEMP); 1983 if (nd->nd_flag & ND_NFSV3) 1984 nfsrv_postopattr(nd, getret, &at); 1985 goto out; 1986 } 1987 1988 /* 1989 * Save this position, in case there is an error before one entry 1990 * is created. 1991 */ 1992 mb0 = nd->nd_mb; 1993 bpos0 = nd->nd_bpos; 1994 1995 /* 1996 * Fill in the first part of the reply. 1997 * dirlen is the reply length in bytes and cannot exceed cnt. 1998 * (Include the two booleans at the end of the reply in dirlen now, 1999 * so we recognize when we have exceeded cnt.) 2000 */ 2001 if (nd->nd_flag & ND_NFSV3) { 2002 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2003 nfsrv_postopattr(nd, getret, &at); 2004 } else { 2005 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2006 } 2007 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2008 txdr_hyper(at.na_filerev, tl); 2009 2010 /* 2011 * Save this position, in case there is an empty reply needed. 2012 */ 2013 mb1 = nd->nd_mb; 2014 bpos1 = nd->nd_bpos; 2015 2016 /* Loop through the records and build reply */ 2017 entrycnt = 0; 2018 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2019 nlen = dp->d_namlen; 2020 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2021 nlen <= NFS_MAXNAMLEN && 2022 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2023 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2024 || (nlen == 1 && dp->d_name[0] != '.'))) { 2025 /* 2026 * Save the current position in the reply, in case 2027 * this entry exceeds cnt. 2028 */ 2029 mb1 = nd->nd_mb; 2030 bpos1 = nd->nd_bpos; 2031 2032 /* 2033 * For readdir_and_lookup get the vnode using 2034 * the file number. 2035 */ 2036 nvp = NULL; 2037 refp = NULL; 2038 r = 0; 2039 at_root = 0; 2040 needs_unbusy = 0; 2041 new_mp = mp; 2042 mounted_on_fileno = (uint64_t)dp->d_fileno; 2043 if ((nd->nd_flag & ND_NFSV3) || 2044 NFSNONZERO_ATTRBIT(&savbits)) { 2045 if (nd->nd_flag & ND_NFSV4) 2046 refp = nfsv4root_getreferral(NULL, 2047 vp, dp->d_fileno); 2048 if (refp == NULL) { 2049 if (usevget) 2050 r = VFS_VGET(mp, dp->d_fileno, 2051 LK_SHARED, &nvp); 2052 else 2053 r = EOPNOTSUPP; 2054 if (r == EOPNOTSUPP) { 2055 if (usevget) { 2056 usevget = 0; 2057 cn.cn_nameiop = LOOKUP; 2058 cn.cn_lkflags = 2059 LK_SHARED | 2060 LK_RETRY; 2061 cn.cn_cred = 2062 nd->nd_cred; 2063 cn.cn_thread = p; 2064 } 2065 cn.cn_nameptr = dp->d_name; 2066 cn.cn_namelen = nlen; 2067 cn.cn_flags = ISLASTCN | 2068 NOFOLLOW | LOCKLEAF; 2069 if (nlen == 2 && 2070 dp->d_name[0] == '.' && 2071 dp->d_name[1] == '.') 2072 cn.cn_flags |= 2073 ISDOTDOT; 2074 if (NFSVOPLOCK(vp, LK_SHARED) 2075 != 0) { 2076 nd->nd_repstat = EPERM; 2077 break; 2078 } 2079 if ((vp->v_vflag & VV_ROOT) != 0 2080 && (cn.cn_flags & ISDOTDOT) 2081 != 0) { 2082 vref(vp); 2083 nvp = vp; 2084 r = 0; 2085 } else { 2086 r = VOP_LOOKUP(vp, &nvp, 2087 &cn); 2088 if (vp != nvp) 2089 NFSVOPUNLOCK(vp, 2090 0); 2091 } 2092 } 2093 2094 /* 2095 * For NFSv4, check to see if nvp is 2096 * a mount point and get the mount 2097 * point vnode, as required. 2098 */ 2099 if (r == 0 && 2100 nfsrv_enable_crossmntpt != 0 && 2101 (nd->nd_flag & ND_NFSV4) != 0 && 2102 nvp->v_type == VDIR && 2103 nvp->v_mountedhere != NULL) { 2104 new_mp = nvp->v_mountedhere; 2105 r = vfs_busy(new_mp, 0); 2106 vput(nvp); 2107 nvp = NULL; 2108 if (r == 0) { 2109 r = VFS_ROOT(new_mp, 2110 LK_SHARED, &nvp); 2111 needs_unbusy = 1; 2112 if (r == 0) 2113 at_root = 1; 2114 } 2115 } 2116 } 2117 if (!r) { 2118 if (refp == NULL && 2119 ((nd->nd_flag & ND_NFSV3) || 2120 NFSNONZERO_ATTRBIT(&attrbits))) { 2121 r = nfsvno_getfh(nvp, &nfh, p); 2122 if (!r) 2123 r = nfsvno_getattr(nvp, nvap, 2124 nd->nd_cred, p, 1); 2125 } 2126 } else { 2127 nvp = NULL; 2128 } 2129 if (r) { 2130 if (!NFSISSET_ATTRBIT(&attrbits, 2131 NFSATTRBIT_RDATTRERROR)) { 2132 if (nvp != NULL) 2133 vput(nvp); 2134 if (needs_unbusy != 0) 2135 vfs_unbusy(new_mp); 2136 nd->nd_repstat = r; 2137 break; 2138 } 2139 } 2140 } 2141 2142 /* 2143 * Build the directory record xdr 2144 */ 2145 if (nd->nd_flag & ND_NFSV3) { 2146 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2147 *tl++ = newnfs_true; 2148 *tl++ = 0; 2149 *tl = txdr_unsigned(dp->d_fileno); 2150 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2151 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2152 *tl++ = 0; 2153 *tl = txdr_unsigned(*cookiep); 2154 nfsrv_postopattr(nd, 0, nvap); 2155 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2156 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2157 if (nvp != NULL) 2158 vput(nvp); 2159 } else { 2160 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2161 *tl++ = newnfs_true; 2162 *tl++ = 0; 2163 *tl = txdr_unsigned(*cookiep); 2164 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2165 if (nvp != NULL) { 2166 supports_nfsv4acls = 2167 nfs_supportsnfsv4acls(nvp); 2168 NFSVOPUNLOCK(nvp, 0); 2169 } else 2170 supports_nfsv4acls = 0; 2171 if (refp != NULL) { 2172 dirlen += nfsrv_putreferralattr(nd, 2173 &savbits, refp, 0, 2174 &nd->nd_repstat); 2175 if (nd->nd_repstat) { 2176 if (nvp != NULL) 2177 vrele(nvp); 2178 if (needs_unbusy != 0) 2179 vfs_unbusy(new_mp); 2180 break; 2181 } 2182 } else if (r) { 2183 dirlen += nfsvno_fillattr(nd, new_mp, 2184 nvp, nvap, &nfh, r, &rderrbits, 2185 nd->nd_cred, p, isdgram, 0, 2186 supports_nfsv4acls, at_root, 2187 mounted_on_fileno); 2188 } else { 2189 dirlen += nfsvno_fillattr(nd, new_mp, 2190 nvp, nvap, &nfh, r, &attrbits, 2191 nd->nd_cred, p, isdgram, 0, 2192 supports_nfsv4acls, at_root, 2193 mounted_on_fileno); 2194 } 2195 if (nvp != NULL) 2196 vrele(nvp); 2197 dirlen += (3 * NFSX_UNSIGNED); 2198 } 2199 if (needs_unbusy != 0) 2200 vfs_unbusy(new_mp); 2201 if (dirlen <= cnt) 2202 entrycnt++; 2203 } 2204 cpos += dp->d_reclen; 2205 dp = (struct dirent *)cpos; 2206 cookiep++; 2207 ncookies--; 2208 } 2209 vrele(vp); 2210 vfs_unbusy(mp); 2211 2212 /* 2213 * If dirlen > cnt, we must strip off the last entry. If that 2214 * results in an empty reply, report NFSERR_TOOSMALL. 2215 */ 2216 if (dirlen > cnt || nd->nd_repstat) { 2217 if (!nd->nd_repstat && entrycnt == 0) 2218 nd->nd_repstat = NFSERR_TOOSMALL; 2219 if (nd->nd_repstat) 2220 newnfs_trimtrailing(nd, mb0, bpos0); 2221 else 2222 newnfs_trimtrailing(nd, mb1, bpos1); 2223 eofflag = 0; 2224 } else if (cpos < cend) 2225 eofflag = 0; 2226 if (!nd->nd_repstat) { 2227 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2228 *tl++ = newnfs_false; 2229 if (eofflag) 2230 *tl = newnfs_true; 2231 else 2232 *tl = newnfs_false; 2233 } 2234 FREE((caddr_t)cookies, M_TEMP); 2235 FREE((caddr_t)rbuf, M_TEMP); 2236 2237 out: 2238 NFSEXITCODE2(0, nd); 2239 return (0); 2240 nfsmout: 2241 vput(vp); 2242 NFSEXITCODE2(error, nd); 2243 return (error); 2244 } 2245 2246 /* 2247 * Get the settable attributes out of the mbuf list. 2248 * (Return 0 or EBADRPC) 2249 */ 2250 int 2251 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2252 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2253 { 2254 u_int32_t *tl; 2255 struct nfsv2_sattr *sp; 2256 int error = 0, toclient = 0; 2257 2258 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2259 case ND_NFSV2: 2260 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2261 /* 2262 * Some old clients didn't fill in the high order 16bits. 2263 * --> check the low order 2 bytes for 0xffff 2264 */ 2265 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2266 nvap->na_mode = nfstov_mode(sp->sa_mode); 2267 if (sp->sa_uid != newnfs_xdrneg1) 2268 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2269 if (sp->sa_gid != newnfs_xdrneg1) 2270 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2271 if (sp->sa_size != newnfs_xdrneg1) 2272 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2273 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2274 #ifdef notyet 2275 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2276 #else 2277 nvap->na_atime.tv_sec = 2278 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2279 nvap->na_atime.tv_nsec = 0; 2280 #endif 2281 } 2282 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2283 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2284 break; 2285 case ND_NFSV3: 2286 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2287 if (*tl == newnfs_true) { 2288 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2289 nvap->na_mode = nfstov_mode(*tl); 2290 } 2291 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2292 if (*tl == newnfs_true) { 2293 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2294 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2295 } 2296 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2297 if (*tl == newnfs_true) { 2298 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2299 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2300 } 2301 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2302 if (*tl == newnfs_true) { 2303 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2304 nvap->na_size = fxdr_hyper(tl); 2305 } 2306 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2307 switch (fxdr_unsigned(int, *tl)) { 2308 case NFSV3SATTRTIME_TOCLIENT: 2309 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2310 fxdr_nfsv3time(tl, &nvap->na_atime); 2311 toclient = 1; 2312 break; 2313 case NFSV3SATTRTIME_TOSERVER: 2314 vfs_timestamp(&nvap->na_atime); 2315 nvap->na_vaflags |= VA_UTIMES_NULL; 2316 break; 2317 }; 2318 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2319 switch (fxdr_unsigned(int, *tl)) { 2320 case NFSV3SATTRTIME_TOCLIENT: 2321 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2322 fxdr_nfsv3time(tl, &nvap->na_mtime); 2323 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2324 break; 2325 case NFSV3SATTRTIME_TOSERVER: 2326 vfs_timestamp(&nvap->na_mtime); 2327 if (!toclient) 2328 nvap->na_vaflags |= VA_UTIMES_NULL; 2329 break; 2330 }; 2331 break; 2332 case ND_NFSV4: 2333 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2334 }; 2335 nfsmout: 2336 NFSEXITCODE2(error, nd); 2337 return (error); 2338 } 2339 2340 /* 2341 * Handle the setable attributes for V4. 2342 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2343 */ 2344 int 2345 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2346 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2347 { 2348 u_int32_t *tl; 2349 int attrsum = 0; 2350 int i, j; 2351 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2352 int toclient = 0; 2353 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2354 uid_t uid; 2355 gid_t gid; 2356 2357 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2358 if (error) 2359 goto nfsmout; 2360 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2361 attrsize = fxdr_unsigned(int, *tl); 2362 2363 /* 2364 * Loop around getting the setable attributes. If an unsupported 2365 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2366 */ 2367 if (retnotsup) { 2368 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2369 bitpos = NFSATTRBIT_MAX; 2370 } else { 2371 bitpos = 0; 2372 } 2373 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2374 if (attrsum > attrsize) { 2375 error = NFSERR_BADXDR; 2376 goto nfsmout; 2377 } 2378 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2379 switch (bitpos) { 2380 case NFSATTRBIT_SIZE: 2381 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2382 nvap->na_size = fxdr_hyper(tl); 2383 attrsum += NFSX_HYPER; 2384 break; 2385 case NFSATTRBIT_ACL: 2386 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2387 p); 2388 if (error) 2389 goto nfsmout; 2390 if (aceerr && !nd->nd_repstat) 2391 nd->nd_repstat = aceerr; 2392 attrsum += aclsize; 2393 break; 2394 case NFSATTRBIT_ARCHIVE: 2395 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2396 if (!nd->nd_repstat) 2397 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2398 attrsum += NFSX_UNSIGNED; 2399 break; 2400 case NFSATTRBIT_HIDDEN: 2401 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2402 if (!nd->nd_repstat) 2403 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2404 attrsum += NFSX_UNSIGNED; 2405 break; 2406 case NFSATTRBIT_MIMETYPE: 2407 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2408 i = fxdr_unsigned(int, *tl); 2409 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2410 if (error) 2411 goto nfsmout; 2412 if (!nd->nd_repstat) 2413 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2414 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2415 break; 2416 case NFSATTRBIT_MODE: 2417 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2418 nvap->na_mode = nfstov_mode(*tl); 2419 attrsum += NFSX_UNSIGNED; 2420 break; 2421 case NFSATTRBIT_OWNER: 2422 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2423 j = fxdr_unsigned(int, *tl); 2424 if (j < 0) { 2425 error = NFSERR_BADXDR; 2426 goto nfsmout; 2427 } 2428 if (j > NFSV4_SMALLSTR) 2429 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2430 else 2431 cp = namestr; 2432 error = nfsrv_mtostr(nd, cp, j); 2433 if (error) { 2434 if (j > NFSV4_SMALLSTR) 2435 free(cp, M_NFSSTRING); 2436 goto nfsmout; 2437 } 2438 if (!nd->nd_repstat) { 2439 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2440 p); 2441 if (!nd->nd_repstat) 2442 nvap->na_uid = uid; 2443 } 2444 if (j > NFSV4_SMALLSTR) 2445 free(cp, M_NFSSTRING); 2446 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2447 break; 2448 case NFSATTRBIT_OWNERGROUP: 2449 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2450 j = fxdr_unsigned(int, *tl); 2451 if (j < 0) { 2452 error = NFSERR_BADXDR; 2453 goto nfsmout; 2454 } 2455 if (j > NFSV4_SMALLSTR) 2456 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2457 else 2458 cp = namestr; 2459 error = nfsrv_mtostr(nd, cp, j); 2460 if (error) { 2461 if (j > NFSV4_SMALLSTR) 2462 free(cp, M_NFSSTRING); 2463 goto nfsmout; 2464 } 2465 if (!nd->nd_repstat) { 2466 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2467 p); 2468 if (!nd->nd_repstat) 2469 nvap->na_gid = gid; 2470 } 2471 if (j > NFSV4_SMALLSTR) 2472 free(cp, M_NFSSTRING); 2473 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2474 break; 2475 case NFSATTRBIT_SYSTEM: 2476 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2477 if (!nd->nd_repstat) 2478 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2479 attrsum += NFSX_UNSIGNED; 2480 break; 2481 case NFSATTRBIT_TIMEACCESSSET: 2482 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2483 attrsum += NFSX_UNSIGNED; 2484 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2485 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2486 fxdr_nfsv4time(tl, &nvap->na_atime); 2487 toclient = 1; 2488 attrsum += NFSX_V4TIME; 2489 } else { 2490 vfs_timestamp(&nvap->na_atime); 2491 nvap->na_vaflags |= VA_UTIMES_NULL; 2492 } 2493 break; 2494 case NFSATTRBIT_TIMEBACKUP: 2495 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2496 if (!nd->nd_repstat) 2497 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2498 attrsum += NFSX_V4TIME; 2499 break; 2500 case NFSATTRBIT_TIMECREATE: 2501 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2502 if (!nd->nd_repstat) 2503 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2504 attrsum += NFSX_V4TIME; 2505 break; 2506 case NFSATTRBIT_TIMEMODIFYSET: 2507 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2508 attrsum += NFSX_UNSIGNED; 2509 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2510 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2511 fxdr_nfsv4time(tl, &nvap->na_mtime); 2512 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2513 attrsum += NFSX_V4TIME; 2514 } else { 2515 vfs_timestamp(&nvap->na_mtime); 2516 if (!toclient) 2517 nvap->na_vaflags |= VA_UTIMES_NULL; 2518 } 2519 break; 2520 default: 2521 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2522 /* 2523 * set bitpos so we drop out of the loop. 2524 */ 2525 bitpos = NFSATTRBIT_MAX; 2526 break; 2527 }; 2528 } 2529 2530 /* 2531 * some clients pad the attrlist, so we need to skip over the 2532 * padding. 2533 */ 2534 if (attrsum > attrsize) { 2535 error = NFSERR_BADXDR; 2536 } else { 2537 attrsize = NFSM_RNDUP(attrsize); 2538 if (attrsum < attrsize) 2539 error = nfsm_advance(nd, attrsize - attrsum, -1); 2540 } 2541 nfsmout: 2542 NFSEXITCODE2(error, nd); 2543 return (error); 2544 } 2545 2546 /* 2547 * Check/setup export credentials. 2548 */ 2549 int 2550 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2551 struct ucred *credanon) 2552 { 2553 int error = 0; 2554 2555 /* 2556 * Check/setup credentials. 2557 */ 2558 if (nd->nd_flag & ND_GSS) 2559 exp->nes_exflag &= ~MNT_EXPORTANON; 2560 2561 /* 2562 * Check to see if the operation is allowed for this security flavor. 2563 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2564 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2565 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2566 */ 2567 if (nfsvno_testexp(nd, exp) && 2568 nd->nd_procnum != NFSV4OP_SECINFO && 2569 nd->nd_procnum != NFSPROC_FSINFO) { 2570 if (nd->nd_flag & ND_NFSV4) 2571 error = NFSERR_WRONGSEC; 2572 else 2573 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2574 goto out; 2575 } 2576 2577 /* 2578 * Check to see if the file system is exported V4 only. 2579 */ 2580 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2581 error = NFSERR_PROGNOTV4; 2582 goto out; 2583 } 2584 2585 /* 2586 * Now, map the user credentials. 2587 * (Note that ND_AUTHNONE will only be set for an NFSv3 2588 * Fsinfo RPC. If set for anything else, this code might need 2589 * to change.) 2590 */ 2591 if (NFSVNO_EXPORTED(exp) && 2592 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) || 2593 NFSVNO_EXPORTANON(exp) || 2594 (nd->nd_flag & ND_AUTHNONE))) { 2595 nd->nd_cred->cr_uid = credanon->cr_uid; 2596 nd->nd_cred->cr_gid = credanon->cr_gid; 2597 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2598 credanon->cr_groups); 2599 } 2600 2601 out: 2602 NFSEXITCODE2(error, nd); 2603 return (error); 2604 } 2605 2606 /* 2607 * Check exports. 2608 */ 2609 int 2610 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2611 struct ucred **credp) 2612 { 2613 int i, error, *secflavors; 2614 2615 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2616 &exp->nes_numsecflavor, &secflavors); 2617 if (error) { 2618 if (nfs_rootfhset) { 2619 exp->nes_exflag = 0; 2620 exp->nes_numsecflavor = 0; 2621 error = 0; 2622 } 2623 } else { 2624 /* Copy the security flavors. */ 2625 for (i = 0; i < exp->nes_numsecflavor; i++) 2626 exp->nes_secflavors[i] = secflavors[i]; 2627 } 2628 NFSEXITCODE(error); 2629 return (error); 2630 } 2631 2632 /* 2633 * Get a vnode for a file handle and export stuff. 2634 */ 2635 int 2636 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2637 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2638 struct ucred **credp) 2639 { 2640 int i, error, *secflavors; 2641 2642 *credp = NULL; 2643 exp->nes_numsecflavor = 0; 2644 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2645 if (error != 0) 2646 /* Make sure the server replies ESTALE to the client. */ 2647 error = ESTALE; 2648 if (nam && !error) { 2649 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2650 &exp->nes_numsecflavor, &secflavors); 2651 if (error) { 2652 if (nfs_rootfhset) { 2653 exp->nes_exflag = 0; 2654 exp->nes_numsecflavor = 0; 2655 error = 0; 2656 } else { 2657 vput(*vpp); 2658 } 2659 } else { 2660 /* Copy the security flavors. */ 2661 for (i = 0; i < exp->nes_numsecflavor; i++) 2662 exp->nes_secflavors[i] = secflavors[i]; 2663 } 2664 } 2665 NFSEXITCODE(error); 2666 return (error); 2667 } 2668 2669 /* 2670 * nfsd_fhtovp() - convert a fh to a vnode ptr 2671 * - look up fsid in mount list (if not found ret error) 2672 * - get vp and export rights by calling nfsvno_fhtovp() 2673 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2674 * for AUTH_SYS 2675 * - if mpp != NULL, return the mount point so that it can 2676 * be used for vn_finished_write() by the caller 2677 */ 2678 void 2679 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2680 struct vnode **vpp, struct nfsexstuff *exp, 2681 struct mount **mpp, int startwrite, struct thread *p) 2682 { 2683 struct mount *mp; 2684 struct ucred *credanon; 2685 fhandle_t *fhp; 2686 2687 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2688 /* 2689 * Check for the special case of the nfsv4root_fh. 2690 */ 2691 mp = vfs_busyfs(&fhp->fh_fsid); 2692 if (mpp != NULL) 2693 *mpp = mp; 2694 if (mp == NULL) { 2695 *vpp = NULL; 2696 nd->nd_repstat = ESTALE; 2697 goto out; 2698 } 2699 2700 if (startwrite) { 2701 vn_start_write(NULL, mpp, V_WAIT); 2702 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2703 lktype = LK_EXCLUSIVE; 2704 } 2705 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2706 &credanon); 2707 vfs_unbusy(mp); 2708 2709 /* 2710 * For NFSv4 without a pseudo root fs, unexported file handles 2711 * can be returned, so that Lookup works everywhere. 2712 */ 2713 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2714 !(nd->nd_flag & ND_NFSV4)) { 2715 vput(*vpp); 2716 nd->nd_repstat = EACCES; 2717 } 2718 2719 /* 2720 * Personally, I've never seen any point in requiring a 2721 * reserved port#, since only in the rare case where the 2722 * clients are all boxes with secure system priviledges, 2723 * does it provide any enhanced security, but... some people 2724 * believe it to be useful and keep putting this code back in. 2725 * (There is also some "security checker" out there that 2726 * complains if the nfs server doesn't enforce this.) 2727 * However, note the following: 2728 * RFC3530 (NFSv4) specifies that a reserved port# not be 2729 * required. 2730 * RFC2623 recommends that, if a reserved port# is checked for, 2731 * that there be a way to turn that off--> ifdef'd. 2732 */ 2733 #ifdef NFS_REQRSVPORT 2734 if (!nd->nd_repstat) { 2735 struct sockaddr_in *saddr; 2736 struct sockaddr_in6 *saddr6; 2737 2738 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2739 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2740 if (!(nd->nd_flag & ND_NFSV4) && 2741 ((saddr->sin_family == AF_INET && 2742 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2743 (saddr6->sin6_family == AF_INET6 && 2744 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2745 vput(*vpp); 2746 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2747 } 2748 } 2749 #endif /* NFS_REQRSVPORT */ 2750 2751 /* 2752 * Check/setup credentials. 2753 */ 2754 if (!nd->nd_repstat) { 2755 nd->nd_saveduid = nd->nd_cred->cr_uid; 2756 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2757 if (nd->nd_repstat) 2758 vput(*vpp); 2759 } 2760 if (credanon != NULL) 2761 crfree(credanon); 2762 if (nd->nd_repstat) { 2763 if (startwrite) 2764 vn_finished_write(mp); 2765 *vpp = NULL; 2766 if (mpp != NULL) 2767 *mpp = NULL; 2768 } 2769 2770 out: 2771 NFSEXITCODE2(0, nd); 2772 } 2773 2774 /* 2775 * glue for fp. 2776 */ 2777 static int 2778 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2779 { 2780 struct filedesc *fdp; 2781 struct file *fp; 2782 int error = 0; 2783 2784 fdp = p->td_proc->p_fd; 2785 if (fd < 0 || fd >= fdp->fd_nfiles || 2786 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2787 error = EBADF; 2788 goto out; 2789 } 2790 *fpp = fp; 2791 2792 out: 2793 NFSEXITCODE(error); 2794 return (error); 2795 } 2796 2797 /* 2798 * Called from nfssvc() to update the exports list. Just call 2799 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2800 * in the mount list. 2801 */ 2802 int 2803 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2804 { 2805 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2806 int error = 0; 2807 struct nameidata nd; 2808 fhandle_t fh; 2809 2810 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2811 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2812 nfs_rootfhset = 0; 2813 else if (error == 0) { 2814 if (nfsexargp->fspec == NULL) { 2815 error = EPERM; 2816 goto out; 2817 } 2818 /* 2819 * If fspec != NULL, this is the v4root path. 2820 */ 2821 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2822 nfsexargp->fspec, p); 2823 if ((error = namei(&nd)) != 0) 2824 goto out; 2825 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2826 vrele(nd.ni_vp); 2827 if (!error) { 2828 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2829 NFSBCOPY((caddr_t)&fh, 2830 nfs_rootfh.nfsrvfh_data, 2831 sizeof (fhandle_t)); 2832 nfs_rootfhset = 1; 2833 } 2834 } 2835 2836 out: 2837 NFSEXITCODE(error); 2838 return (error); 2839 } 2840 2841 /* 2842 * Get the tcp socket sequence numbers we need. 2843 * (Maybe this should be moved to the tcp sources?) 2844 */ 2845 int 2846 nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap) 2847 { 2848 struct inpcb *inp; 2849 struct tcpcb *tp; 2850 int error = 0; 2851 2852 inp = sotoinpcb(so); 2853 KASSERT(inp != NULL, ("nfsrv_getsocksndseq: inp == NULL")); 2854 INP_RLOCK(inp); 2855 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 2856 INP_RUNLOCK(inp); 2857 error = EPIPE; 2858 goto out; 2859 } 2860 tp = intotcpcb(inp); 2861 if (tp->t_state != TCPS_ESTABLISHED) { 2862 INP_RUNLOCK(inp); 2863 error = EPIPE; 2864 goto out; 2865 } 2866 *maxp = tp->snd_max; 2867 *unap = tp->snd_una; 2868 INP_RUNLOCK(inp); 2869 2870 out: 2871 NFSEXITCODE(error); 2872 return (error); 2873 } 2874 2875 /* 2876 * This function needs to test to see if the system is near its limit 2877 * for memory allocation via malloc() or mget() and return True iff 2878 * either of these resources are near their limit. 2879 * XXX (For now, this is just a stub.) 2880 */ 2881 int nfsrv_testmalloclimit = 0; 2882 int 2883 nfsrv_mallocmget_limit(void) 2884 { 2885 static int printmesg = 0; 2886 static int testval = 1; 2887 2888 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2889 if ((printmesg++ % 100) == 0) 2890 printf("nfsd: malloc/mget near limit\n"); 2891 return (1); 2892 } 2893 return (0); 2894 } 2895 2896 /* 2897 * BSD specific initialization of a mount point. 2898 */ 2899 void 2900 nfsd_mntinit(void) 2901 { 2902 static int inited = 0; 2903 2904 if (inited) 2905 return; 2906 inited = 1; 2907 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2908 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2909 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2910 nfsv4root_mnt.mnt_export = NULL; 2911 TAILQ_INIT(&nfsv4root_opt); 2912 TAILQ_INIT(&nfsv4root_newopt); 2913 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2914 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2915 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2916 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2917 } 2918 2919 /* 2920 * Get a vnode for a file handle, without checking exports, etc. 2921 */ 2922 struct vnode * 2923 nfsvno_getvp(fhandle_t *fhp) 2924 { 2925 struct mount *mp; 2926 struct vnode *vp; 2927 int error; 2928 2929 mp = vfs_busyfs(&fhp->fh_fsid); 2930 if (mp == NULL) 2931 return (NULL); 2932 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2933 vfs_unbusy(mp); 2934 if (error) 2935 return (NULL); 2936 return (vp); 2937 } 2938 2939 /* 2940 * Do a local VOP_ADVLOCK(). 2941 */ 2942 int 2943 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2944 u_int64_t end, struct thread *td) 2945 { 2946 int error = 0; 2947 struct flock fl; 2948 u_int64_t tlen; 2949 2950 if (nfsrv_dolocallocks == 0) 2951 goto out; 2952 2953 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */ 2954 if ((vp->v_iflag & VI_DOOMED) != 0) { 2955 error = EPERM; 2956 goto out; 2957 } 2958 2959 fl.l_whence = SEEK_SET; 2960 fl.l_type = ftype; 2961 fl.l_start = (off_t)first; 2962 if (end == NFS64BITSSET) { 2963 fl.l_len = 0; 2964 } else { 2965 tlen = end - first; 2966 fl.l_len = (off_t)tlen; 2967 } 2968 /* 2969 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2970 * values for all calls, so that all locks will be held by the 2971 * nfsd server. (The nfsd server handles conflicts between the 2972 * various clients.) 2973 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2974 * bytes, so it can't be put in l_sysid. 2975 */ 2976 if (nfsv4_sysid == 0) 2977 nfsv4_sysid = nlm_acquire_next_sysid(); 2978 fl.l_pid = (pid_t)0; 2979 fl.l_sysid = (int)nfsv4_sysid; 2980 2981 NFSVOPUNLOCK(vp, 0); 2982 if (ftype == F_UNLCK) 2983 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 2984 (F_POSIX | F_REMOTE)); 2985 else 2986 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 2987 (F_POSIX | F_REMOTE)); 2988 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2989 2990 out: 2991 NFSEXITCODE(error); 2992 return (error); 2993 } 2994 2995 /* 2996 * Check the nfsv4 root exports. 2997 */ 2998 int 2999 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3000 { 3001 struct ucred *credanon; 3002 int exflags, error = 0, numsecflavor, *secflavors, i; 3003 3004 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3005 &credanon, &numsecflavor, &secflavors); 3006 if (error) { 3007 error = NFSERR_PROGUNAVAIL; 3008 goto out; 3009 } 3010 if (credanon != NULL) 3011 crfree(credanon); 3012 for (i = 0; i < numsecflavor; i++) { 3013 if (secflavors[i] == AUTH_SYS) 3014 nd->nd_flag |= ND_EXAUTHSYS; 3015 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3016 nd->nd_flag |= ND_EXGSS; 3017 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3018 nd->nd_flag |= ND_EXGSSINTEGRITY; 3019 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3020 nd->nd_flag |= ND_EXGSSPRIVACY; 3021 } 3022 3023 out: 3024 NFSEXITCODE(error); 3025 return (error); 3026 } 3027 3028 /* 3029 * Nfs server psuedo system call for the nfsd's 3030 */ 3031 /* 3032 * MPSAFE 3033 */ 3034 static int 3035 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3036 { 3037 struct file *fp; 3038 struct nfsd_addsock_args sockarg; 3039 struct nfsd_nfsd_args nfsdarg; 3040 cap_rights_t rights; 3041 int error; 3042 3043 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3044 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3045 if (error) 3046 goto out; 3047 /* 3048 * Since we don't know what rights might be required, 3049 * pretend that we need them all. It is better to be too 3050 * careful than too reckless. 3051 */ 3052 error = fget(td, sockarg.sock, 3053 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3054 if (error != 0) 3055 goto out; 3056 if (fp->f_type != DTYPE_SOCKET) { 3057 fdrop(fp, td); 3058 error = EPERM; 3059 goto out; 3060 } 3061 error = nfsrvd_addsock(fp); 3062 fdrop(fp, td); 3063 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3064 if (uap->argp == NULL) { 3065 error = EINVAL; 3066 goto out; 3067 } 3068 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3069 sizeof (nfsdarg)); 3070 if (error) 3071 goto out; 3072 error = nfsrvd_nfsd(td, &nfsdarg); 3073 } else { 3074 error = nfssvc_srvcall(td, uap, td->td_ucred); 3075 } 3076 3077 out: 3078 NFSEXITCODE(error); 3079 return (error); 3080 } 3081 3082 static int 3083 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3084 { 3085 struct nfsex_args export; 3086 struct file *fp = NULL; 3087 int stablefd, len; 3088 struct nfsd_clid adminrevoke; 3089 struct nfsd_dumplist dumplist; 3090 struct nfsd_dumpclients *dumpclients; 3091 struct nfsd_dumplocklist dumplocklist; 3092 struct nfsd_dumplocks *dumplocks; 3093 struct nameidata nd; 3094 vnode_t vp; 3095 int error = EINVAL, igotlock; 3096 struct proc *procp; 3097 static int suspend_nfsd = 0; 3098 3099 if (uap->flag & NFSSVC_PUBLICFH) { 3100 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3101 sizeof (fhandle_t)); 3102 error = copyin(uap->argp, 3103 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3104 if (!error) 3105 nfs_pubfhset = 1; 3106 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3107 error = copyin(uap->argp,(caddr_t)&export, 3108 sizeof (struct nfsex_args)); 3109 if (!error) 3110 error = nfsrv_v4rootexport(&export, cred, p); 3111 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3112 nfs_pubfhset = 0; 3113 error = 0; 3114 } else if (uap->flag & NFSSVC_STABLERESTART) { 3115 error = copyin(uap->argp, (caddr_t)&stablefd, 3116 sizeof (int)); 3117 if (!error) 3118 error = fp_getfvp(p, stablefd, &fp, &vp); 3119 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3120 error = EBADF; 3121 if (!error && newnfs_numnfsd != 0) 3122 error = EPERM; 3123 if (!error) { 3124 nfsrv_stablefirst.nsf_fp = fp; 3125 nfsrv_setupstable(p); 3126 } 3127 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3128 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3129 sizeof (struct nfsd_clid)); 3130 if (!error) 3131 error = nfsrv_adminrevoke(&adminrevoke, p); 3132 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3133 error = copyin(uap->argp, (caddr_t)&dumplist, 3134 sizeof (struct nfsd_dumplist)); 3135 if (!error && (dumplist.ndl_size < 1 || 3136 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3137 error = EPERM; 3138 if (!error) { 3139 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3140 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3141 M_TEMP, M_WAITOK); 3142 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3143 error = copyout(dumpclients, 3144 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3145 free((caddr_t)dumpclients, M_TEMP); 3146 } 3147 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3148 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3149 sizeof (struct nfsd_dumplocklist)); 3150 if (!error && (dumplocklist.ndllck_size < 1 || 3151 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3152 error = EPERM; 3153 if (!error) 3154 error = nfsrv_lookupfilename(&nd, 3155 dumplocklist.ndllck_fname, p); 3156 if (!error) { 3157 len = sizeof (struct nfsd_dumplocks) * 3158 dumplocklist.ndllck_size; 3159 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3160 M_TEMP, M_WAITOK); 3161 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3162 dumplocklist.ndllck_size, p); 3163 vput(nd.ni_vp); 3164 error = copyout(dumplocks, 3165 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3166 free((caddr_t)dumplocks, M_TEMP); 3167 } 3168 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3169 procp = p->td_proc; 3170 PROC_LOCK(procp); 3171 nfsd_master_pid = procp->p_pid; 3172 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3173 nfsd_master_start = procp->p_stats->p_start; 3174 nfsd_master_proc = procp; 3175 PROC_UNLOCK(procp); 3176 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3177 NFSLOCKV4ROOTMUTEX(); 3178 if (suspend_nfsd == 0) { 3179 /* Lock out all nfsd threads */ 3180 do { 3181 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3182 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3183 } while (igotlock == 0 && suspend_nfsd == 0); 3184 suspend_nfsd = 1; 3185 } 3186 NFSUNLOCKV4ROOTMUTEX(); 3187 error = 0; 3188 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3189 NFSLOCKV4ROOTMUTEX(); 3190 if (suspend_nfsd != 0) { 3191 nfsv4_unlock(&nfsd_suspend_lock, 0); 3192 suspend_nfsd = 0; 3193 } 3194 NFSUNLOCKV4ROOTMUTEX(); 3195 error = 0; 3196 } 3197 3198 NFSEXITCODE(error); 3199 return (error); 3200 } 3201 3202 /* 3203 * Check exports. 3204 * Returns 0 if ok, 1 otherwise. 3205 */ 3206 int 3207 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3208 { 3209 int i; 3210 3211 /* 3212 * This seems odd, but allow the case where the security flavor 3213 * list is empty. This happens when NFSv4 is traversing non-exported 3214 * file systems. Exported file systems should always have a non-empty 3215 * security flavor list. 3216 */ 3217 if (exp->nes_numsecflavor == 0) 3218 return (0); 3219 3220 for (i = 0; i < exp->nes_numsecflavor; i++) { 3221 /* 3222 * The tests for privacy and integrity must be first, 3223 * since ND_GSS is set for everything but AUTH_SYS. 3224 */ 3225 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3226 (nd->nd_flag & ND_GSSPRIVACY)) 3227 return (0); 3228 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3229 (nd->nd_flag & ND_GSSINTEGRITY)) 3230 return (0); 3231 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3232 (nd->nd_flag & ND_GSS)) 3233 return (0); 3234 if (exp->nes_secflavors[i] == AUTH_SYS && 3235 (nd->nd_flag & ND_GSS) == 0) 3236 return (0); 3237 } 3238 return (1); 3239 } 3240 3241 /* 3242 * Calculate a hash value for the fid in a file handle. 3243 */ 3244 uint32_t 3245 nfsrv_hashfh(fhandle_t *fhp) 3246 { 3247 uint32_t hashval; 3248 3249 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3250 return (hashval); 3251 } 3252 3253 /* 3254 * Signal the userland master nfsd to backup the stable restart file. 3255 */ 3256 void 3257 nfsrv_backupstable(void) 3258 { 3259 struct proc *procp; 3260 3261 if (nfsd_master_proc != NULL) { 3262 procp = pfind(nfsd_master_pid); 3263 /* Try to make sure it is the correct process. */ 3264 if (procp == nfsd_master_proc && 3265 procp->p_stats->p_start.tv_sec == 3266 nfsd_master_start.tv_sec && 3267 procp->p_stats->p_start.tv_usec == 3268 nfsd_master_start.tv_usec && 3269 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3270 kern_psignal(procp, SIGUSR2); 3271 else 3272 nfsd_master_proc = NULL; 3273 3274 if (procp != NULL) 3275 PROC_UNLOCK(procp); 3276 } 3277 } 3278 3279 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3280 3281 /* 3282 * Called once to initialize data structures... 3283 */ 3284 static int 3285 nfsd_modevent(module_t mod, int type, void *data) 3286 { 3287 int error = 0, i; 3288 static int loaded = 0; 3289 3290 switch (type) { 3291 case MOD_LOAD: 3292 if (loaded) 3293 goto out; 3294 newnfs_portinit(); 3295 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3296 snprintf(nfsrchash_table[i].lock_name, 3297 sizeof(nfsrchash_table[i].lock_name), "nfsrc_tcp%d", 3298 i); 3299 mtx_init(&nfsrchash_table[i].mtx, 3300 nfsrchash_table[i].lock_name, NULL, MTX_DEF); 3301 } 3302 mtx_init(&nfsrc_udpmtx, "nfs_udpcache_mutex", NULL, MTX_DEF); 3303 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF); 3304 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL, 3305 MTX_DEF); 3306 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3307 nfsrvd_initcache(); 3308 nfsd_init(); 3309 NFSD_LOCK(); 3310 nfsrvd_init(0); 3311 NFSD_UNLOCK(); 3312 nfsd_mntinit(); 3313 #ifdef VV_DISABLEDELEG 3314 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3315 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3316 #endif 3317 nfsd_call_servertimer = nfsrv_servertimer; 3318 nfsd_call_nfsd = nfssvc_nfsd; 3319 loaded = 1; 3320 break; 3321 3322 case MOD_UNLOAD: 3323 if (newnfs_numnfsd != 0) { 3324 error = EBUSY; 3325 break; 3326 } 3327 3328 #ifdef VV_DISABLEDELEG 3329 vn_deleg_ops.vndeleg_recall = NULL; 3330 vn_deleg_ops.vndeleg_disable = NULL; 3331 #endif 3332 nfsd_call_servertimer = NULL; 3333 nfsd_call_nfsd = NULL; 3334 3335 /* Clean out all NFSv4 state. */ 3336 nfsrv_throwawayallstate(curthread); 3337 3338 /* Clean the NFS server reply cache */ 3339 nfsrvd_cleancache(); 3340 3341 /* Free up the krpc server pool. */ 3342 if (nfsrvd_pool != NULL) 3343 svcpool_destroy(nfsrvd_pool); 3344 3345 /* and get rid of the locks */ 3346 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) 3347 mtx_destroy(&nfsrchash_table[i].mtx); 3348 mtx_destroy(&nfsrc_udpmtx); 3349 mtx_destroy(&nfs_v4root_mutex); 3350 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3351 lockdestroy(&nfsv4root_mnt.mnt_explock); 3352 loaded = 0; 3353 break; 3354 default: 3355 error = EOPNOTSUPP; 3356 break; 3357 } 3358 3359 out: 3360 NFSEXITCODE(error); 3361 return (error); 3362 } 3363 static moduledata_t nfsd_mod = { 3364 "nfsd", 3365 nfsd_modevent, 3366 NULL, 3367 }; 3368 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3369 3370 /* So that loader and kldload(2) can find us, wherever we are.. */ 3371 MODULE_VERSION(nfsd, 1); 3372 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3373 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3374 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3375 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3376 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3377 3378
Indexes created Wed Sep 24 14:09:57 GMT 2025