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