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sys/fs/nfsserver/nfs_nfsdport.c
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1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD: releng/10.0/sys/fs/nfsserver/nfs_nfsdport.c 255219 2013-09-05 00:09:56Z pjd $"); 36 37 #include <sys/capability.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 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 62 NFSDLOCKMUTEX; 63 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 64 struct mtx nfsrc_udpmtx; 65 struct mtx nfs_v4root_mutex; 66 struct nfsrvfh nfs_rootfh, nfs_pubfh; 67 int nfs_pubfhset = 0, nfs_rootfhset = 0; 68 struct proc *nfsd_master_proc = NULL; 69 static pid_t nfsd_master_pid = (pid_t)-1; 70 static char nfsd_master_comm[MAXCOMLEN + 1]; 71 static struct timeval nfsd_master_start; 72 static uint32_t nfsv4_sysid = 0; 73 74 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 75 struct ucred *); 76 77 int nfsrv_enable_crossmntpt = 1; 78 static int nfs_commit_blks; 79 static int nfs_commit_miss; 80 extern int nfsrv_issuedelegs; 81 extern int nfsrv_dolocallocks; 82 83 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server"); 84 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 85 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 86 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 87 0, ""); 88 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 89 0, ""); 90 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 91 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 92 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 93 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 94 95 #define MAX_REORDERED_RPC 16 96 #define NUM_HEURISTIC 1031 97 #define NHUSE_INIT 64 98 #define NHUSE_INC 16 99 #define NHUSE_MAX 2048 100 101 static struct nfsheur { 102 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 103 off_t nh_nextoff; /* next offset for sequential detection */ 104 int nh_use; /* use count for selection */ 105 int nh_seqcount; /* heuristic */ 106 } nfsheur[NUM_HEURISTIC]; 107 108 109 /* 110 * Heuristic to detect sequential operation. 111 */ 112 static struct nfsheur * 113 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 114 { 115 struct nfsheur *nh; 116 int hi, try; 117 118 /* Locate best candidate. */ 119 try = 32; 120 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 121 nh = &nfsheur[hi]; 122 while (try--) { 123 if (nfsheur[hi].nh_vp == vp) { 124 nh = &nfsheur[hi]; 125 break; 126 } 127 if (nfsheur[hi].nh_use > 0) 128 --nfsheur[hi].nh_use; 129 hi = (hi + 1) % NUM_HEURISTIC; 130 if (nfsheur[hi].nh_use < nh->nh_use) 131 nh = &nfsheur[hi]; 132 } 133 134 /* Initialize hint if this is a new file. */ 135 if (nh->nh_vp != vp) { 136 nh->nh_vp = vp; 137 nh->nh_nextoff = uio->uio_offset; 138 nh->nh_use = NHUSE_INIT; 139 if (uio->uio_offset == 0) 140 nh->nh_seqcount = 4; 141 else 142 nh->nh_seqcount = 1; 143 } 144 145 /* Calculate heuristic. */ 146 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 147 uio->uio_offset == nh->nh_nextoff) { 148 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 149 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 150 if (nh->nh_seqcount > IO_SEQMAX) 151 nh->nh_seqcount = IO_SEQMAX; 152 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 153 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 154 /* Probably a reordered RPC, leave seqcount alone. */ 155 } else if (nh->nh_seqcount > 1) { 156 nh->nh_seqcount /= 2; 157 } else { 158 nh->nh_seqcount = 0; 159 } 160 nh->nh_use += NHUSE_INC; 161 if (nh->nh_use > NHUSE_MAX) 162 nh->nh_use = NHUSE_MAX; 163 return (nh); 164 } 165 166 /* 167 * Get attributes into nfsvattr structure. 168 */ 169 int 170 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 171 struct thread *p, int vpislocked) 172 { 173 int error, lockedit = 0; 174 175 if (vpislocked == 0) { 176 /* 177 * When vpislocked == 0, the vnode is either exclusively 178 * locked by this thread or not locked by this thread. 179 * As such, shared lock it, if not exclusively locked. 180 */ 181 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 182 lockedit = 1; 183 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 184 } 185 } 186 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 187 if (lockedit != 0) 188 NFSVOPUNLOCK(vp, 0); 189 190 NFSEXITCODE(error); 191 return (error); 192 } 193 194 /* 195 * Get a file handle for a vnode. 196 */ 197 int 198 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 199 { 200 int error; 201 202 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 203 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 204 error = VOP_VPTOFH(vp, &fhp->fh_fid); 205 206 NFSEXITCODE(error); 207 return (error); 208 } 209 210 /* 211 * Perform access checking for vnodes obtained from file handles that would 212 * refer to files already opened by a Unix client. You cannot just use 213 * vn_writechk() and VOP_ACCESSX() for two reasons. 214 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 215 * case. 216 * 2 - The owner is to be given access irrespective of mode bits for some 217 * operations, so that processes that chmod after opening a file don't 218 * break. 219 */ 220 int 221 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 222 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 223 u_int32_t *supportedtypep) 224 { 225 struct vattr vattr; 226 int error = 0, getret = 0; 227 228 if (vpislocked == 0) { 229 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 230 error = EPERM; 231 goto out; 232 } 233 } 234 if (accmode & VWRITE) { 235 /* Just vn_writechk() changed to check rdonly */ 236 /* 237 * Disallow write attempts on read-only file systems; 238 * unless the file is a socket or a block or character 239 * device resident on the file system. 240 */ 241 if (NFSVNO_EXRDONLY(exp) || 242 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 243 switch (vp->v_type) { 244 case VREG: 245 case VDIR: 246 case VLNK: 247 error = EROFS; 248 default: 249 break; 250 } 251 } 252 /* 253 * If there's shared text associated with 254 * the inode, try to free it up once. If 255 * we fail, we can't allow writing. 256 */ 257 if (VOP_IS_TEXT(vp) && error == 0) 258 error = ETXTBSY; 259 } 260 if (error != 0) { 261 if (vpislocked == 0) 262 NFSVOPUNLOCK(vp, 0); 263 goto out; 264 } 265 266 /* 267 * Should the override still be applied when ACLs are enabled? 268 */ 269 error = VOP_ACCESSX(vp, accmode, cred, p); 270 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 271 /* 272 * Try again with VEXPLICIT_DENY, to see if the test for 273 * deletion is supported. 274 */ 275 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 276 if (error == 0) { 277 if (vp->v_type == VDIR) { 278 accmode &= ~(VDELETE | VDELETE_CHILD); 279 accmode |= VWRITE; 280 error = VOP_ACCESSX(vp, accmode, cred, p); 281 } else if (supportedtypep != NULL) { 282 *supportedtypep &= ~NFSACCESS_DELETE; 283 } 284 } 285 } 286 287 /* 288 * Allow certain operations for the owner (reads and writes 289 * on files that are already open). 290 */ 291 if (override != NFSACCCHK_NOOVERRIDE && 292 (error == EPERM || error == EACCES)) { 293 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 294 error = 0; 295 else if (override & NFSACCCHK_ALLOWOWNER) { 296 getret = VOP_GETATTR(vp, &vattr, cred); 297 if (getret == 0 && cred->cr_uid == vattr.va_uid) 298 error = 0; 299 } 300 } 301 if (vpislocked == 0) 302 NFSVOPUNLOCK(vp, 0); 303 304 out: 305 NFSEXITCODE(error); 306 return (error); 307 } 308 309 /* 310 * Set attribute(s) vnop. 311 */ 312 int 313 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 314 struct thread *p, struct nfsexstuff *exp) 315 { 316 int error; 317 318 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 319 NFSEXITCODE(error); 320 return (error); 321 } 322 323 /* 324 * Set up nameidata for a lookup() call and do it. 325 */ 326 int 327 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 328 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 329 struct vnode **retdirp) 330 { 331 struct componentname *cnp = &ndp->ni_cnd; 332 int i; 333 struct iovec aiov; 334 struct uio auio; 335 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 336 int error = 0, crossmnt; 337 char *cp; 338 339 *retdirp = NULL; 340 cnp->cn_nameptr = cnp->cn_pnbuf; 341 ndp->ni_strictrelative = 0; 342 /* 343 * Extract and set starting directory. 344 */ 345 if (dp->v_type != VDIR) { 346 if (islocked) 347 vput(dp); 348 else 349 vrele(dp); 350 nfsvno_relpathbuf(ndp); 351 error = ENOTDIR; 352 goto out1; 353 } 354 if (islocked) 355 NFSVOPUNLOCK(dp, 0); 356 VREF(dp); 357 *retdirp = dp; 358 if (NFSVNO_EXRDONLY(exp)) 359 cnp->cn_flags |= RDONLY; 360 ndp->ni_segflg = UIO_SYSSPACE; 361 crossmnt = 1; 362 363 if (nd->nd_flag & ND_PUBLOOKUP) { 364 ndp->ni_loopcnt = 0; 365 if (cnp->cn_pnbuf[0] == '/') { 366 vrele(dp); 367 /* 368 * Check for degenerate pathnames here, since lookup() 369 * panics on them. 370 */ 371 for (i = 1; i < ndp->ni_pathlen; i++) 372 if (cnp->cn_pnbuf[i] != '/') 373 break; 374 if (i == ndp->ni_pathlen) { 375 error = NFSERR_ACCES; 376 goto out; 377 } 378 dp = rootvnode; 379 VREF(dp); 380 } 381 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 382 (nd->nd_flag & ND_NFSV4) == 0) { 383 /* 384 * Only cross mount points for NFSv4 when doing a 385 * mount while traversing the file system above 386 * the mount point, unless nfsrv_enable_crossmntpt is set. 387 */ 388 cnp->cn_flags |= NOCROSSMOUNT; 389 crossmnt = 0; 390 } 391 392 /* 393 * Initialize for scan, set ni_startdir and bump ref on dp again 394 * because lookup() will dereference ni_startdir. 395 */ 396 397 cnp->cn_thread = p; 398 ndp->ni_startdir = dp; 399 ndp->ni_rootdir = rootvnode; 400 ndp->ni_topdir = NULL; 401 402 if (!lockleaf) 403 cnp->cn_flags |= LOCKLEAF; 404 for (;;) { 405 cnp->cn_nameptr = cnp->cn_pnbuf; 406 /* 407 * Call lookup() to do the real work. If an error occurs, 408 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 409 * we do not have to dereference anything before returning. 410 * In either case ni_startdir will be dereferenced and NULLed 411 * out. 412 */ 413 error = lookup(ndp); 414 if (error) 415 break; 416 417 /* 418 * Check for encountering a symbolic link. Trivial 419 * termination occurs if no symlink encountered. 420 */ 421 if ((cnp->cn_flags & ISSYMLINK) == 0) { 422 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 423 nfsvno_relpathbuf(ndp); 424 if (ndp->ni_vp && !lockleaf) 425 NFSVOPUNLOCK(ndp->ni_vp, 0); 426 break; 427 } 428 429 /* 430 * Validate symlink 431 */ 432 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 433 NFSVOPUNLOCK(ndp->ni_dvp, 0); 434 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 435 error = EINVAL; 436 goto badlink2; 437 } 438 439 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 440 error = ELOOP; 441 goto badlink2; 442 } 443 if (ndp->ni_pathlen > 1) 444 cp = uma_zalloc(namei_zone, M_WAITOK); 445 else 446 cp = cnp->cn_pnbuf; 447 aiov.iov_base = cp; 448 aiov.iov_len = MAXPATHLEN; 449 auio.uio_iov = &aiov; 450 auio.uio_iovcnt = 1; 451 auio.uio_offset = 0; 452 auio.uio_rw = UIO_READ; 453 auio.uio_segflg = UIO_SYSSPACE; 454 auio.uio_td = NULL; 455 auio.uio_resid = MAXPATHLEN; 456 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 457 if (error) { 458 badlink1: 459 if (ndp->ni_pathlen > 1) 460 uma_zfree(namei_zone, cp); 461 badlink2: 462 vrele(ndp->ni_dvp); 463 vput(ndp->ni_vp); 464 break; 465 } 466 linklen = MAXPATHLEN - auio.uio_resid; 467 if (linklen == 0) { 468 error = ENOENT; 469 goto badlink1; 470 } 471 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 472 error = ENAMETOOLONG; 473 goto badlink1; 474 } 475 476 /* 477 * Adjust or replace path 478 */ 479 if (ndp->ni_pathlen > 1) { 480 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 481 uma_zfree(namei_zone, cnp->cn_pnbuf); 482 cnp->cn_pnbuf = cp; 483 } else 484 cnp->cn_pnbuf[linklen] = '\0'; 485 ndp->ni_pathlen += linklen; 486 487 /* 488 * Cleanup refs for next loop and check if root directory 489 * should replace current directory. Normally ni_dvp 490 * becomes the new base directory and is cleaned up when 491 * we loop. Explicitly null pointers after invalidation 492 * to clarify operation. 493 */ 494 vput(ndp->ni_vp); 495 ndp->ni_vp = NULL; 496 497 if (cnp->cn_pnbuf[0] == '/') { 498 vrele(ndp->ni_dvp); 499 ndp->ni_dvp = ndp->ni_rootdir; 500 VREF(ndp->ni_dvp); 501 } 502 ndp->ni_startdir = ndp->ni_dvp; 503 ndp->ni_dvp = NULL; 504 } 505 if (!lockleaf) 506 cnp->cn_flags &= ~LOCKLEAF; 507 508 out: 509 if (error) { 510 nfsvno_relpathbuf(ndp); 511 ndp->ni_vp = NULL; 512 ndp->ni_dvp = NULL; 513 ndp->ni_startdir = NULL; 514 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 515 ndp->ni_dvp = NULL; 516 } 517 518 out1: 519 NFSEXITCODE2(error, nd); 520 return (error); 521 } 522 523 /* 524 * Set up a pathname buffer and return a pointer to it and, optionally 525 * set a hash pointer. 526 */ 527 void 528 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 529 { 530 struct componentname *cnp = &ndp->ni_cnd; 531 532 cnp->cn_flags |= (NOMACCHECK | HASBUF); 533 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 534 if (hashpp != NULL) 535 *hashpp = NULL; 536 *bufpp = cnp->cn_pnbuf; 537 } 538 539 /* 540 * Release the above path buffer, if not released by nfsvno_namei(). 541 */ 542 void 543 nfsvno_relpathbuf(struct nameidata *ndp) 544 { 545 546 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 547 panic("nfsrelpath"); 548 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 549 ndp->ni_cnd.cn_flags &= ~HASBUF; 550 } 551 552 /* 553 * Readlink vnode op into an mbuf list. 554 */ 555 int 556 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 557 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 558 { 559 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 560 struct iovec *ivp = iv; 561 struct uio io, *uiop = &io; 562 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 563 int i, len, tlen, error = 0; 564 565 len = 0; 566 i = 0; 567 while (len < NFS_MAXPATHLEN) { 568 NFSMGET(mp); 569 MCLGET(mp, M_WAITOK); 570 mp->m_len = NFSMSIZ(mp); 571 if (len == 0) { 572 mp3 = mp2 = mp; 573 } else { 574 mp2->m_next = mp; 575 mp2 = mp; 576 } 577 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 578 mp->m_len = NFS_MAXPATHLEN - len; 579 len = NFS_MAXPATHLEN; 580 } else { 581 len += mp->m_len; 582 } 583 ivp->iov_base = mtod(mp, caddr_t); 584 ivp->iov_len = mp->m_len; 585 i++; 586 ivp++; 587 } 588 uiop->uio_iov = iv; 589 uiop->uio_iovcnt = i; 590 uiop->uio_offset = 0; 591 uiop->uio_resid = len; 592 uiop->uio_rw = UIO_READ; 593 uiop->uio_segflg = UIO_SYSSPACE; 594 uiop->uio_td = NULL; 595 error = VOP_READLINK(vp, uiop, cred); 596 if (error) { 597 m_freem(mp3); 598 *lenp = 0; 599 goto out; 600 } 601 if (uiop->uio_resid > 0) { 602 len -= uiop->uio_resid; 603 tlen = NFSM_RNDUP(len); 604 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 605 } 606 *lenp = len; 607 *mpp = mp3; 608 *mpendp = mp; 609 610 out: 611 NFSEXITCODE(error); 612 return (error); 613 } 614 615 /* 616 * Read vnode op call into mbuf list. 617 */ 618 int 619 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 620 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 621 { 622 struct mbuf *m; 623 int i; 624 struct iovec *iv; 625 struct iovec *iv2; 626 int error = 0, len, left, siz, tlen, ioflag = 0; 627 struct mbuf *m2 = NULL, *m3; 628 struct uio io, *uiop = &io; 629 struct nfsheur *nh; 630 631 len = left = NFSM_RNDUP(cnt); 632 m3 = NULL; 633 /* 634 * Generate the mbuf list with the uio_iov ref. to it. 635 */ 636 i = 0; 637 while (left > 0) { 638 NFSMGET(m); 639 MCLGET(m, M_WAITOK); 640 m->m_len = 0; 641 siz = min(M_TRAILINGSPACE(m), left); 642 left -= siz; 643 i++; 644 if (m3) 645 m2->m_next = m; 646 else 647 m3 = m; 648 m2 = m; 649 } 650 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 651 M_TEMP, M_WAITOK); 652 uiop->uio_iov = iv2 = iv; 653 m = m3; 654 left = len; 655 i = 0; 656 while (left > 0) { 657 if (m == NULL) 658 panic("nfsvno_read iov"); 659 siz = min(M_TRAILINGSPACE(m), left); 660 if (siz > 0) { 661 iv->iov_base = mtod(m, caddr_t) + m->m_len; 662 iv->iov_len = siz; 663 m->m_len += siz; 664 left -= siz; 665 iv++; 666 i++; 667 } 668 m = m->m_next; 669 } 670 uiop->uio_iovcnt = i; 671 uiop->uio_offset = off; 672 uiop->uio_resid = len; 673 uiop->uio_rw = UIO_READ; 674 uiop->uio_segflg = UIO_SYSSPACE; 675 nh = nfsrv_sequential_heuristic(uiop, vp); 676 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 677 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 678 FREE((caddr_t)iv2, M_TEMP); 679 if (error) { 680 m_freem(m3); 681 *mpp = NULL; 682 goto out; 683 } 684 nh->nh_nextoff = uiop->uio_offset; 685 tlen = len - uiop->uio_resid; 686 cnt = cnt < tlen ? cnt : tlen; 687 tlen = NFSM_RNDUP(cnt); 688 if (tlen == 0) { 689 m_freem(m3); 690 m3 = NULL; 691 } else if (len != tlen || tlen != cnt) 692 nfsrv_adj(m3, len - tlen, tlen - cnt); 693 *mpp = m3; 694 *mpendp = m2; 695 696 out: 697 NFSEXITCODE(error); 698 return (error); 699 } 700 701 /* 702 * Write vnode op from an mbuf list. 703 */ 704 int 705 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 706 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 707 { 708 struct iovec *ivp; 709 int i, len; 710 struct iovec *iv; 711 int ioflags, error; 712 struct uio io, *uiop = &io; 713 struct nfsheur *nh; 714 715 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 716 M_WAITOK); 717 uiop->uio_iov = iv = ivp; 718 uiop->uio_iovcnt = cnt; 719 i = mtod(mp, caddr_t) + mp->m_len - cp; 720 len = retlen; 721 while (len > 0) { 722 if (mp == NULL) 723 panic("nfsvno_write"); 724 if (i > 0) { 725 i = min(i, len); 726 ivp->iov_base = cp; 727 ivp->iov_len = i; 728 ivp++; 729 len -= i; 730 } 731 mp = mp->m_next; 732 if (mp) { 733 i = mp->m_len; 734 cp = mtod(mp, caddr_t); 735 } 736 } 737 738 if (stable == NFSWRITE_UNSTABLE) 739 ioflags = IO_NODELOCKED; 740 else 741 ioflags = (IO_SYNC | IO_NODELOCKED); 742 uiop->uio_resid = retlen; 743 uiop->uio_rw = UIO_WRITE; 744 uiop->uio_segflg = UIO_SYSSPACE; 745 NFSUIOPROC(uiop, p); 746 uiop->uio_offset = off; 747 nh = nfsrv_sequential_heuristic(uiop, vp); 748 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 749 error = VOP_WRITE(vp, uiop, ioflags, cred); 750 if (error == 0) 751 nh->nh_nextoff = uiop->uio_offset; 752 FREE((caddr_t)iv, M_TEMP); 753 754 NFSEXITCODE(error); 755 return (error); 756 } 757 758 /* 759 * Common code for creating a regular file (plus special files for V2). 760 */ 761 int 762 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 763 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 764 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 765 { 766 u_quad_t tempsize; 767 int error; 768 769 error = nd->nd_repstat; 770 if (!error && ndp->ni_vp == NULL) { 771 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 772 vrele(ndp->ni_startdir); 773 error = VOP_CREATE(ndp->ni_dvp, 774 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 775 vput(ndp->ni_dvp); 776 nfsvno_relpathbuf(ndp); 777 if (!error) { 778 if (*exclusive_flagp) { 779 *exclusive_flagp = 0; 780 NFSVNO_ATTRINIT(nvap); 781 nvap->na_atime.tv_sec = cverf[0]; 782 nvap->na_atime.tv_nsec = cverf[1]; 783 error = VOP_SETATTR(ndp->ni_vp, 784 &nvap->na_vattr, nd->nd_cred); 785 } 786 } 787 /* 788 * NFS V2 Only. nfsrvd_mknod() does this for V3. 789 * (This implies, just get out on an error.) 790 */ 791 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 792 nvap->na_type == VFIFO) { 793 if (nvap->na_type == VCHR && rdev == 0xffffffff) 794 nvap->na_type = VFIFO; 795 if (nvap->na_type != VFIFO && 796 (error = priv_check_cred(nd->nd_cred, 797 PRIV_VFS_MKNOD_DEV, 0))) { 798 vrele(ndp->ni_startdir); 799 nfsvno_relpathbuf(ndp); 800 vput(ndp->ni_dvp); 801 goto out; 802 } 803 nvap->na_rdev = rdev; 804 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 805 &ndp->ni_cnd, &nvap->na_vattr); 806 vput(ndp->ni_dvp); 807 nfsvno_relpathbuf(ndp); 808 vrele(ndp->ni_startdir); 809 if (error) 810 goto out; 811 } else { 812 vrele(ndp->ni_startdir); 813 nfsvno_relpathbuf(ndp); 814 vput(ndp->ni_dvp); 815 error = ENXIO; 816 goto out; 817 } 818 *vpp = ndp->ni_vp; 819 } else { 820 /* 821 * Handle cases where error is already set and/or 822 * the file exists. 823 * 1 - clean up the lookup 824 * 2 - iff !error and na_size set, truncate it 825 */ 826 vrele(ndp->ni_startdir); 827 nfsvno_relpathbuf(ndp); 828 *vpp = ndp->ni_vp; 829 if (ndp->ni_dvp == *vpp) 830 vrele(ndp->ni_dvp); 831 else 832 vput(ndp->ni_dvp); 833 if (!error && nvap->na_size != VNOVAL) { 834 error = nfsvno_accchk(*vpp, VWRITE, 835 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 836 NFSACCCHK_VPISLOCKED, NULL); 837 if (!error) { 838 tempsize = nvap->na_size; 839 NFSVNO_ATTRINIT(nvap); 840 nvap->na_size = tempsize; 841 error = VOP_SETATTR(*vpp, 842 &nvap->na_vattr, nd->nd_cred); 843 } 844 } 845 if (error) 846 vput(*vpp); 847 } 848 849 out: 850 NFSEXITCODE(error); 851 return (error); 852 } 853 854 /* 855 * Do a mknod vnode op. 856 */ 857 int 858 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 859 struct thread *p) 860 { 861 int error = 0; 862 enum vtype vtyp; 863 864 vtyp = nvap->na_type; 865 /* 866 * Iff doesn't exist, create it. 867 */ 868 if (ndp->ni_vp) { 869 vrele(ndp->ni_startdir); 870 nfsvno_relpathbuf(ndp); 871 vput(ndp->ni_dvp); 872 vrele(ndp->ni_vp); 873 error = EEXIST; 874 goto out; 875 } 876 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 877 vrele(ndp->ni_startdir); 878 nfsvno_relpathbuf(ndp); 879 vput(ndp->ni_dvp); 880 error = NFSERR_BADTYPE; 881 goto out; 882 } 883 if (vtyp == VSOCK) { 884 vrele(ndp->ni_startdir); 885 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 886 &ndp->ni_cnd, &nvap->na_vattr); 887 vput(ndp->ni_dvp); 888 nfsvno_relpathbuf(ndp); 889 } else { 890 if (nvap->na_type != VFIFO && 891 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 892 vrele(ndp->ni_startdir); 893 nfsvno_relpathbuf(ndp); 894 vput(ndp->ni_dvp); 895 goto out; 896 } 897 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 898 &ndp->ni_cnd, &nvap->na_vattr); 899 vput(ndp->ni_dvp); 900 nfsvno_relpathbuf(ndp); 901 vrele(ndp->ni_startdir); 902 /* 903 * Since VOP_MKNOD returns the ni_vp, I can't 904 * see any reason to do the lookup. 905 */ 906 } 907 908 out: 909 NFSEXITCODE(error); 910 return (error); 911 } 912 913 /* 914 * Mkdir vnode op. 915 */ 916 int 917 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 918 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 919 { 920 int error = 0; 921 922 if (ndp->ni_vp != NULL) { 923 if (ndp->ni_dvp == ndp->ni_vp) 924 vrele(ndp->ni_dvp); 925 else 926 vput(ndp->ni_dvp); 927 vrele(ndp->ni_vp); 928 nfsvno_relpathbuf(ndp); 929 error = EEXIST; 930 goto out; 931 } 932 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 933 &nvap->na_vattr); 934 vput(ndp->ni_dvp); 935 nfsvno_relpathbuf(ndp); 936 937 out: 938 NFSEXITCODE(error); 939 return (error); 940 } 941 942 /* 943 * symlink vnode op. 944 */ 945 int 946 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 947 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 948 struct nfsexstuff *exp) 949 { 950 int error = 0; 951 952 if (ndp->ni_vp) { 953 vrele(ndp->ni_startdir); 954 nfsvno_relpathbuf(ndp); 955 if (ndp->ni_dvp == ndp->ni_vp) 956 vrele(ndp->ni_dvp); 957 else 958 vput(ndp->ni_dvp); 959 vrele(ndp->ni_vp); 960 error = EEXIST; 961 goto out; 962 } 963 964 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 965 &nvap->na_vattr, pathcp); 966 vput(ndp->ni_dvp); 967 vrele(ndp->ni_startdir); 968 nfsvno_relpathbuf(ndp); 969 /* 970 * Although FreeBSD still had the lookup code in 971 * it for 7/current, there doesn't seem to be any 972 * point, since VOP_SYMLINK() returns the ni_vp. 973 * Just vput it for v2. 974 */ 975 if (!not_v2 && !error) 976 vput(ndp->ni_vp); 977 978 out: 979 NFSEXITCODE(error); 980 return (error); 981 } 982 983 /* 984 * Parse symbolic link arguments. 985 * This function has an ugly side effect. It will MALLOC() an area for 986 * the symlink and set iov_base to point to it, only if it succeeds. 987 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 988 * be FREE'd later. 989 */ 990 int 991 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 992 struct thread *p, char **pathcpp, int *lenp) 993 { 994 u_int32_t *tl; 995 char *pathcp = NULL; 996 int error = 0, len; 997 struct nfsv2_sattr *sp; 998 999 *pathcpp = NULL; 1000 *lenp = 0; 1001 if ((nd->nd_flag & ND_NFSV3) && 1002 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p))) 1003 goto nfsmout; 1004 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1005 len = fxdr_unsigned(int, *tl); 1006 if (len > NFS_MAXPATHLEN || len <= 0) { 1007 error = EBADRPC; 1008 goto nfsmout; 1009 } 1010 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1011 error = nfsrv_mtostr(nd, pathcp, len); 1012 if (error) 1013 goto nfsmout; 1014 if (nd->nd_flag & ND_NFSV2) { 1015 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1016 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1017 } 1018 *pathcpp = pathcp; 1019 *lenp = len; 1020 NFSEXITCODE2(0, nd); 1021 return (0); 1022 nfsmout: 1023 if (pathcp) 1024 free(pathcp, M_TEMP); 1025 NFSEXITCODE2(error, nd); 1026 return (error); 1027 } 1028 1029 /* 1030 * Remove a non-directory object. 1031 */ 1032 int 1033 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1034 struct thread *p, struct nfsexstuff *exp) 1035 { 1036 struct vnode *vp; 1037 int error = 0; 1038 1039 vp = ndp->ni_vp; 1040 if (vp->v_type == VDIR) 1041 error = NFSERR_ISDIR; 1042 else if (is_v4) 1043 error = nfsrv_checkremove(vp, 1, p); 1044 if (!error) 1045 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1046 if (ndp->ni_dvp == vp) 1047 vrele(ndp->ni_dvp); 1048 else 1049 vput(ndp->ni_dvp); 1050 vput(vp); 1051 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1052 nfsvno_relpathbuf(ndp); 1053 NFSEXITCODE(error); 1054 return (error); 1055 } 1056 1057 /* 1058 * Remove a directory. 1059 */ 1060 int 1061 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1062 struct thread *p, struct nfsexstuff *exp) 1063 { 1064 struct vnode *vp; 1065 int error = 0; 1066 1067 vp = ndp->ni_vp; 1068 if (vp->v_type != VDIR) { 1069 error = ENOTDIR; 1070 goto out; 1071 } 1072 /* 1073 * No rmdir "." please. 1074 */ 1075 if (ndp->ni_dvp == vp) { 1076 error = EINVAL; 1077 goto out; 1078 } 1079 /* 1080 * The root of a mounted filesystem cannot be deleted. 1081 */ 1082 if (vp->v_vflag & VV_ROOT) 1083 error = EBUSY; 1084 out: 1085 if (!error) 1086 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1087 if (ndp->ni_dvp == vp) 1088 vrele(ndp->ni_dvp); 1089 else 1090 vput(ndp->ni_dvp); 1091 vput(vp); 1092 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1093 nfsvno_relpathbuf(ndp); 1094 NFSEXITCODE(error); 1095 return (error); 1096 } 1097 1098 /* 1099 * Rename vnode op. 1100 */ 1101 int 1102 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1103 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1104 { 1105 struct vnode *fvp, *tvp, *tdvp; 1106 int error = 0; 1107 1108 fvp = fromndp->ni_vp; 1109 if (ndstat) { 1110 vrele(fromndp->ni_dvp); 1111 vrele(fvp); 1112 error = ndstat; 1113 goto out1; 1114 } 1115 tdvp = tondp->ni_dvp; 1116 tvp = tondp->ni_vp; 1117 if (tvp != NULL) { 1118 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1119 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1120 goto out; 1121 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1122 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1123 goto out; 1124 } 1125 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1126 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1127 goto out; 1128 } 1129 1130 /* 1131 * A rename to '.' or '..' results in a prematurely 1132 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1133 * here. 1134 */ 1135 if ((tondp->ni_cnd.cn_namelen == 1 && 1136 tondp->ni_cnd.cn_nameptr[0] == '.') || 1137 (tondp->ni_cnd.cn_namelen == 2 && 1138 tondp->ni_cnd.cn_nameptr[0] == '.' && 1139 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1140 error = EINVAL; 1141 goto out; 1142 } 1143 } 1144 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1145 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1146 goto out; 1147 } 1148 if (fvp->v_mount != tdvp->v_mount) { 1149 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1150 goto out; 1151 } 1152 if (fvp == tdvp) { 1153 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1154 goto out; 1155 } 1156 if (fvp == tvp) { 1157 /* 1158 * If source and destination are the same, there is nothing to 1159 * do. Set error to -1 to indicate this. 1160 */ 1161 error = -1; 1162 goto out; 1163 } 1164 if (ndflag & ND_NFSV4) { 1165 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1166 error = nfsrv_checkremove(fvp, 0, p); 1167 NFSVOPUNLOCK(fvp, 0); 1168 } else 1169 error = EPERM; 1170 if (tvp && !error) 1171 error = nfsrv_checkremove(tvp, 1, p); 1172 } else { 1173 /* 1174 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1175 * that the NFSv4 client won't be confused by the rename. 1176 * Since nfsd_recalldelegation() can only be called on an 1177 * unlocked vnode at this point and fvp is the file that will 1178 * still exist after the rename, just do fvp. 1179 */ 1180 nfsd_recalldelegation(fvp, p); 1181 } 1182 out: 1183 if (!error) { 1184 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1185 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1186 &tondp->ni_cnd); 1187 } else { 1188 if (tdvp == tvp) 1189 vrele(tdvp); 1190 else 1191 vput(tdvp); 1192 if (tvp) 1193 vput(tvp); 1194 vrele(fromndp->ni_dvp); 1195 vrele(fvp); 1196 if (error == -1) 1197 error = 0; 1198 } 1199 vrele(tondp->ni_startdir); 1200 nfsvno_relpathbuf(tondp); 1201 out1: 1202 vrele(fromndp->ni_startdir); 1203 nfsvno_relpathbuf(fromndp); 1204 NFSEXITCODE(error); 1205 return (error); 1206 } 1207 1208 /* 1209 * Link vnode op. 1210 */ 1211 int 1212 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1213 struct thread *p, struct nfsexstuff *exp) 1214 { 1215 struct vnode *xp; 1216 int error = 0; 1217 1218 xp = ndp->ni_vp; 1219 if (xp != NULL) { 1220 error = EEXIST; 1221 } else { 1222 xp = ndp->ni_dvp; 1223 if (vp->v_mount != xp->v_mount) 1224 error = EXDEV; 1225 } 1226 if (!error) { 1227 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1228 if ((vp->v_iflag & VI_DOOMED) == 0) 1229 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1230 else 1231 error = EPERM; 1232 if (ndp->ni_dvp == vp) 1233 vrele(ndp->ni_dvp); 1234 else 1235 vput(ndp->ni_dvp); 1236 NFSVOPUNLOCK(vp, 0); 1237 } else { 1238 if (ndp->ni_dvp == ndp->ni_vp) 1239 vrele(ndp->ni_dvp); 1240 else 1241 vput(ndp->ni_dvp); 1242 if (ndp->ni_vp) 1243 vrele(ndp->ni_vp); 1244 } 1245 nfsvno_relpathbuf(ndp); 1246 NFSEXITCODE(error); 1247 return (error); 1248 } 1249 1250 /* 1251 * Do the fsync() appropriate for the commit. 1252 */ 1253 int 1254 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1255 struct thread *td) 1256 { 1257 int error = 0; 1258 1259 /* 1260 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1261 * file is done. At this time VOP_FSYNC does not accept offset and 1262 * byte count parameters so call VOP_FSYNC the whole file for now. 1263 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1264 */ 1265 if (cnt == 0 || cnt > MAX_COMMIT_COUNT) { 1266 /* 1267 * Give up and do the whole thing 1268 */ 1269 if (vp->v_object && 1270 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1271 VM_OBJECT_WLOCK(vp->v_object); 1272 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1273 VM_OBJECT_WUNLOCK(vp->v_object); 1274 } 1275 error = VOP_FSYNC(vp, MNT_WAIT, td); 1276 } else { 1277 /* 1278 * Locate and synchronously write any buffers that fall 1279 * into the requested range. Note: we are assuming that 1280 * f_iosize is a power of 2. 1281 */ 1282 int iosize = vp->v_mount->mnt_stat.f_iosize; 1283 int iomask = iosize - 1; 1284 struct bufobj *bo; 1285 daddr_t lblkno; 1286 1287 /* 1288 * Align to iosize boundry, super-align to page boundry. 1289 */ 1290 if (off & iomask) { 1291 cnt += off & iomask; 1292 off &= ~(u_quad_t)iomask; 1293 } 1294 if (off & PAGE_MASK) { 1295 cnt += off & PAGE_MASK; 1296 off &= ~(u_quad_t)PAGE_MASK; 1297 } 1298 lblkno = off / iosize; 1299 1300 if (vp->v_object && 1301 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1302 VM_OBJECT_WLOCK(vp->v_object); 1303 vm_object_page_clean(vp->v_object, off, off + cnt, 1304 OBJPC_SYNC); 1305 VM_OBJECT_WUNLOCK(vp->v_object); 1306 } 1307 1308 bo = &vp->v_bufobj; 1309 BO_LOCK(bo); 1310 while (cnt > 0) { 1311 struct buf *bp; 1312 1313 /* 1314 * If we have a buffer and it is marked B_DELWRI we 1315 * have to lock and write it. Otherwise the prior 1316 * write is assumed to have already been committed. 1317 * 1318 * gbincore() can return invalid buffers now so we 1319 * have to check that bit as well (though B_DELWRI 1320 * should not be set if B_INVAL is set there could be 1321 * a race here since we haven't locked the buffer). 1322 */ 1323 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1324 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1325 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1326 BO_LOCK(bo); 1327 continue; /* retry */ 1328 } 1329 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1330 B_DELWRI) { 1331 bremfree(bp); 1332 bp->b_flags &= ~B_ASYNC; 1333 bwrite(bp); 1334 ++nfs_commit_miss; 1335 } else 1336 BUF_UNLOCK(bp); 1337 BO_LOCK(bo); 1338 } 1339 ++nfs_commit_blks; 1340 if (cnt < iosize) 1341 break; 1342 cnt -= iosize; 1343 ++lblkno; 1344 } 1345 BO_UNLOCK(bo); 1346 } 1347 NFSEXITCODE(error); 1348 return (error); 1349 } 1350 1351 /* 1352 * Statfs vnode op. 1353 */ 1354 int 1355 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1356 { 1357 int error; 1358 1359 error = VFS_STATFS(vp->v_mount, sf); 1360 if (error == 0) { 1361 /* 1362 * Since NFS handles these values as unsigned on the 1363 * wire, there is no way to represent negative values, 1364 * so set them to 0. Without this, they will appear 1365 * to be very large positive values for clients like 1366 * Solaris10. 1367 */ 1368 if (sf->f_bavail < 0) 1369 sf->f_bavail = 0; 1370 if (sf->f_ffree < 0) 1371 sf->f_ffree = 0; 1372 } 1373 NFSEXITCODE(error); 1374 return (error); 1375 } 1376 1377 /* 1378 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1379 * must handle nfsrv_opencheck() calls after any other access checks. 1380 */ 1381 void 1382 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1383 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1384 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1385 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1386 struct nfsexstuff *exp, struct vnode **vpp) 1387 { 1388 struct vnode *vp = NULL; 1389 u_quad_t tempsize; 1390 struct nfsexstuff nes; 1391 1392 if (ndp->ni_vp == NULL) 1393 nd->nd_repstat = nfsrv_opencheck(clientid, 1394 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1395 if (!nd->nd_repstat) { 1396 if (ndp->ni_vp == NULL) { 1397 vrele(ndp->ni_startdir); 1398 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1399 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1400 vput(ndp->ni_dvp); 1401 nfsvno_relpathbuf(ndp); 1402 if (!nd->nd_repstat) { 1403 if (*exclusive_flagp) { 1404 *exclusive_flagp = 0; 1405 NFSVNO_ATTRINIT(nvap); 1406 nvap->na_atime.tv_sec = cverf[0]; 1407 nvap->na_atime.tv_nsec = cverf[1]; 1408 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1409 &nvap->na_vattr, cred); 1410 } else { 1411 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1412 aclp, p, attrbitp, exp); 1413 } 1414 } 1415 vp = ndp->ni_vp; 1416 } else { 1417 if (ndp->ni_startdir) 1418 vrele(ndp->ni_startdir); 1419 nfsvno_relpathbuf(ndp); 1420 vp = ndp->ni_vp; 1421 if (create == NFSV4OPEN_CREATE) { 1422 if (ndp->ni_dvp == vp) 1423 vrele(ndp->ni_dvp); 1424 else 1425 vput(ndp->ni_dvp); 1426 } 1427 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1428 if (ndp->ni_cnd.cn_flags & RDONLY) 1429 NFSVNO_SETEXRDONLY(&nes); 1430 else 1431 NFSVNO_EXINIT(&nes); 1432 nd->nd_repstat = nfsvno_accchk(vp, 1433 VWRITE, cred, &nes, p, 1434 NFSACCCHK_NOOVERRIDE, 1435 NFSACCCHK_VPISLOCKED, NULL); 1436 nd->nd_repstat = nfsrv_opencheck(clientid, 1437 stateidp, stp, vp, nd, p, nd->nd_repstat); 1438 if (!nd->nd_repstat) { 1439 tempsize = nvap->na_size; 1440 NFSVNO_ATTRINIT(nvap); 1441 nvap->na_size = tempsize; 1442 nd->nd_repstat = VOP_SETATTR(vp, 1443 &nvap->na_vattr, cred); 1444 } 1445 } else if (vp->v_type == VREG) { 1446 nd->nd_repstat = nfsrv_opencheck(clientid, 1447 stateidp, stp, vp, nd, p, nd->nd_repstat); 1448 } 1449 } 1450 } else { 1451 if (ndp->ni_cnd.cn_flags & HASBUF) 1452 nfsvno_relpathbuf(ndp); 1453 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1454 vrele(ndp->ni_startdir); 1455 if (ndp->ni_dvp == ndp->ni_vp) 1456 vrele(ndp->ni_dvp); 1457 else 1458 vput(ndp->ni_dvp); 1459 if (ndp->ni_vp) 1460 vput(ndp->ni_vp); 1461 } 1462 } 1463 *vpp = vp; 1464 1465 NFSEXITCODE2(0, nd); 1466 } 1467 1468 /* 1469 * Updates the file rev and sets the mtime and ctime 1470 * to the current clock time, returning the va_filerev and va_Xtime 1471 * values. 1472 */ 1473 void 1474 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1475 struct ucred *cred, struct thread *p) 1476 { 1477 struct vattr va; 1478 1479 VATTR_NULL(&va); 1480 vfs_timestamp(&va.va_mtime); 1481 (void) VOP_SETATTR(vp, &va, cred); 1482 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1483 } 1484 1485 /* 1486 * Glue routine to nfsv4_fillattr(). 1487 */ 1488 int 1489 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1490 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1491 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1492 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1493 { 1494 int error; 1495 1496 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1497 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1498 mounted_on_fileno); 1499 NFSEXITCODE2(0, nd); 1500 return (error); 1501 } 1502 1503 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1504 /* 1505 * nfs readdir service 1506 * - mallocs what it thinks is enough to read 1507 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1508 * - calls VOP_READDIR() 1509 * - loops around building the reply 1510 * if the output generated exceeds count break out of loop 1511 * The NFSM_CLGET macro is used here so that the reply will be packed 1512 * tightly in mbuf clusters. 1513 * - it trims out records with d_fileno == 0 1514 * this doesn't matter for Unix clients, but they might confuse clients 1515 * for other os'. 1516 * - it trims out records with d_type == DT_WHT 1517 * these cannot be seen through NFS (unless we extend the protocol) 1518 * The alternate call nfsrvd_readdirplus() does lookups as well. 1519 * PS: The NFS protocol spec. does not clarify what the "count" byte 1520 * argument is a count of.. just name strings and file id's or the 1521 * entire reply rpc or ... 1522 * I tried just file name and id sizes and it confused the Sun client, 1523 * so I am using the full rpc size now. The "paranoia.." comment refers 1524 * to including the status longwords that are not a part of the dir. 1525 * "entry" structures, but are in the rpc. 1526 */ 1527 int 1528 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1529 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1530 { 1531 struct dirent *dp; 1532 u_int32_t *tl; 1533 int dirlen; 1534 char *cpos, *cend, *rbuf; 1535 struct nfsvattr at; 1536 int nlen, error = 0, getret = 1; 1537 int siz, cnt, fullsiz, eofflag, ncookies; 1538 u_int64_t off, toff, verf; 1539 u_long *cookies = NULL, *cookiep; 1540 struct uio io; 1541 struct iovec iv; 1542 int not_zfs; 1543 1544 if (nd->nd_repstat) { 1545 nfsrv_postopattr(nd, getret, &at); 1546 goto out; 1547 } 1548 if (nd->nd_flag & ND_NFSV2) { 1549 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1550 off = fxdr_unsigned(u_quad_t, *tl++); 1551 } else { 1552 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1553 off = fxdr_hyper(tl); 1554 tl += 2; 1555 verf = fxdr_hyper(tl); 1556 tl += 2; 1557 } 1558 toff = off; 1559 cnt = fxdr_unsigned(int, *tl); 1560 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1561 cnt = NFS_SRVMAXDATA(nd); 1562 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1563 fullsiz = siz; 1564 if (nd->nd_flag & ND_NFSV3) { 1565 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1566 p, 1); 1567 #if 0 1568 /* 1569 * va_filerev is not sufficient as a cookie verifier, 1570 * since it is not supposed to change when entries are 1571 * removed/added unless that offset cookies returned to 1572 * the client are no longer valid. 1573 */ 1574 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1575 nd->nd_repstat = NFSERR_BAD_COOKIE; 1576 #endif 1577 } 1578 if (!nd->nd_repstat && vp->v_type != VDIR) 1579 nd->nd_repstat = NFSERR_NOTDIR; 1580 if (nd->nd_repstat == 0 && cnt == 0) { 1581 if (nd->nd_flag & ND_NFSV2) 1582 /* NFSv2 does not have NFSERR_TOOSMALL */ 1583 nd->nd_repstat = EPERM; 1584 else 1585 nd->nd_repstat = NFSERR_TOOSMALL; 1586 } 1587 if (!nd->nd_repstat) 1588 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1589 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1590 NFSACCCHK_VPISLOCKED, NULL); 1591 if (nd->nd_repstat) { 1592 vput(vp); 1593 if (nd->nd_flag & ND_NFSV3) 1594 nfsrv_postopattr(nd, getret, &at); 1595 goto out; 1596 } 1597 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1598 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1599 again: 1600 eofflag = 0; 1601 if (cookies) { 1602 free((caddr_t)cookies, M_TEMP); 1603 cookies = NULL; 1604 } 1605 1606 iv.iov_base = rbuf; 1607 iv.iov_len = siz; 1608 io.uio_iov = &iv; 1609 io.uio_iovcnt = 1; 1610 io.uio_offset = (off_t)off; 1611 io.uio_resid = siz; 1612 io.uio_segflg = UIO_SYSSPACE; 1613 io.uio_rw = UIO_READ; 1614 io.uio_td = NULL; 1615 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1616 &cookies); 1617 off = (u_int64_t)io.uio_offset; 1618 if (io.uio_resid) 1619 siz -= io.uio_resid; 1620 1621 if (!cookies && !nd->nd_repstat) 1622 nd->nd_repstat = NFSERR_PERM; 1623 if (nd->nd_flag & ND_NFSV3) { 1624 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1625 if (!nd->nd_repstat) 1626 nd->nd_repstat = getret; 1627 } 1628 1629 /* 1630 * Handles the failed cases. nd->nd_repstat == 0 past here. 1631 */ 1632 if (nd->nd_repstat) { 1633 vput(vp); 1634 free((caddr_t)rbuf, M_TEMP); 1635 if (cookies) 1636 free((caddr_t)cookies, M_TEMP); 1637 if (nd->nd_flag & ND_NFSV3) 1638 nfsrv_postopattr(nd, getret, &at); 1639 goto out; 1640 } 1641 /* 1642 * If nothing read, return eof 1643 * rpc reply 1644 */ 1645 if (siz == 0) { 1646 vput(vp); 1647 if (nd->nd_flag & ND_NFSV2) { 1648 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1649 } else { 1650 nfsrv_postopattr(nd, getret, &at); 1651 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1652 txdr_hyper(at.na_filerev, tl); 1653 tl += 2; 1654 } 1655 *tl++ = newnfs_false; 1656 *tl = newnfs_true; 1657 FREE((caddr_t)rbuf, M_TEMP); 1658 FREE((caddr_t)cookies, M_TEMP); 1659 goto out; 1660 } 1661 1662 /* 1663 * Check for degenerate cases of nothing useful read. 1664 * If so go try again 1665 */ 1666 cpos = rbuf; 1667 cend = rbuf + siz; 1668 dp = (struct dirent *)cpos; 1669 cookiep = cookies; 1670 1671 /* 1672 * For some reason FreeBSD's ufs_readdir() chooses to back the 1673 * directory offset up to a block boundary, so it is necessary to 1674 * skip over the records that precede the requested offset. This 1675 * requires the assumption that file offset cookies monotonically 1676 * increase. 1677 * Since the offset cookies don't monotonically increase for ZFS, 1678 * this is not done when ZFS is the file system. 1679 */ 1680 while (cpos < cend && ncookies > 0 && 1681 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1682 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) { 1683 cpos += dp->d_reclen; 1684 dp = (struct dirent *)cpos; 1685 cookiep++; 1686 ncookies--; 1687 } 1688 if (cpos >= cend || ncookies == 0) { 1689 siz = fullsiz; 1690 toff = off; 1691 goto again; 1692 } 1693 vput(vp); 1694 1695 /* 1696 * dirlen is the size of the reply, including all XDR and must 1697 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1698 * if the XDR should be included in "count", but to be safe, we do. 1699 * (Include the two booleans at the end of the reply in dirlen now.) 1700 */ 1701 if (nd->nd_flag & ND_NFSV3) { 1702 nfsrv_postopattr(nd, getret, &at); 1703 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1704 txdr_hyper(at.na_filerev, tl); 1705 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1706 } else { 1707 dirlen = 2 * NFSX_UNSIGNED; 1708 } 1709 1710 /* Loop through the records and build reply */ 1711 while (cpos < cend && ncookies > 0) { 1712 nlen = dp->d_namlen; 1713 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1714 nlen <= NFS_MAXNAMLEN) { 1715 if (nd->nd_flag & ND_NFSV3) 1716 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1717 else 1718 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1719 if (dirlen > cnt) { 1720 eofflag = 0; 1721 break; 1722 } 1723 1724 /* 1725 * Build the directory record xdr from 1726 * the dirent entry. 1727 */ 1728 if (nd->nd_flag & ND_NFSV3) { 1729 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1730 *tl++ = newnfs_true; 1731 *tl++ = 0; 1732 } else { 1733 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1734 *tl++ = newnfs_true; 1735 } 1736 *tl = txdr_unsigned(dp->d_fileno); 1737 (void) nfsm_strtom(nd, dp->d_name, nlen); 1738 if (nd->nd_flag & ND_NFSV3) { 1739 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1740 *tl++ = 0; 1741 } else 1742 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1743 *tl = txdr_unsigned(*cookiep); 1744 } 1745 cpos += dp->d_reclen; 1746 dp = (struct dirent *)cpos; 1747 cookiep++; 1748 ncookies--; 1749 } 1750 if (cpos < cend) 1751 eofflag = 0; 1752 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1753 *tl++ = newnfs_false; 1754 if (eofflag) 1755 *tl = newnfs_true; 1756 else 1757 *tl = newnfs_false; 1758 FREE((caddr_t)rbuf, M_TEMP); 1759 FREE((caddr_t)cookies, M_TEMP); 1760 1761 out: 1762 NFSEXITCODE2(0, nd); 1763 return (0); 1764 nfsmout: 1765 vput(vp); 1766 NFSEXITCODE2(error, nd); 1767 return (error); 1768 } 1769 1770 /* 1771 * Readdirplus for V3 and Readdir for V4. 1772 */ 1773 int 1774 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1775 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1776 { 1777 struct dirent *dp; 1778 u_int32_t *tl; 1779 int dirlen; 1780 char *cpos, *cend, *rbuf; 1781 struct vnode *nvp; 1782 fhandle_t nfh; 1783 struct nfsvattr nva, at, *nvap = &nva; 1784 struct mbuf *mb0, *mb1; 1785 struct nfsreferral *refp; 1786 int nlen, r, error = 0, getret = 1, usevget = 1; 1787 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1788 caddr_t bpos0, bpos1; 1789 u_int64_t off, toff, verf; 1790 u_long *cookies = NULL, *cookiep; 1791 nfsattrbit_t attrbits, rderrbits, savbits; 1792 struct uio io; 1793 struct iovec iv; 1794 struct componentname cn; 1795 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls; 1796 struct mount *mp, *new_mp; 1797 uint64_t mounted_on_fileno; 1798 1799 if (nd->nd_repstat) { 1800 nfsrv_postopattr(nd, getret, &at); 1801 goto out; 1802 } 1803 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1804 off = fxdr_hyper(tl); 1805 toff = off; 1806 tl += 2; 1807 verf = fxdr_hyper(tl); 1808 tl += 2; 1809 siz = fxdr_unsigned(int, *tl++); 1810 cnt = fxdr_unsigned(int, *tl); 1811 1812 /* 1813 * Use the server's maximum data transfer size as the upper bound 1814 * on reply datalen. 1815 */ 1816 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1817 cnt = NFS_SRVMAXDATA(nd); 1818 1819 /* 1820 * siz is a "hint" of how much directory information (name, fileid, 1821 * cookie) should be in the reply. At least one client "hints" 0, 1822 * so I set it to cnt for that case. I also round it up to the 1823 * next multiple of DIRBLKSIZ. 1824 */ 1825 if (siz <= 0) 1826 siz = cnt; 1827 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1828 1829 if (nd->nd_flag & ND_NFSV4) { 1830 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1831 if (error) 1832 goto nfsmout; 1833 NFSSET_ATTRBIT(&savbits, &attrbits); 1834 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1835 NFSZERO_ATTRBIT(&rderrbits); 1836 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1837 } else { 1838 NFSZERO_ATTRBIT(&attrbits); 1839 } 1840 fullsiz = siz; 1841 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1842 if (!nd->nd_repstat) { 1843 if (off && verf != at.na_filerev) { 1844 /* 1845 * va_filerev is not sufficient as a cookie verifier, 1846 * since it is not supposed to change when entries are 1847 * removed/added unless that offset cookies returned to 1848 * the client are no longer valid. 1849 */ 1850 #if 0 1851 if (nd->nd_flag & ND_NFSV4) { 1852 nd->nd_repstat = NFSERR_NOTSAME; 1853 } else { 1854 nd->nd_repstat = NFSERR_BAD_COOKIE; 1855 } 1856 #endif 1857 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1858 nd->nd_repstat = NFSERR_BAD_COOKIE; 1859 } 1860 } 1861 if (!nd->nd_repstat && vp->v_type != VDIR) 1862 nd->nd_repstat = NFSERR_NOTDIR; 1863 if (!nd->nd_repstat && cnt == 0) 1864 nd->nd_repstat = NFSERR_TOOSMALL; 1865 if (!nd->nd_repstat) 1866 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1867 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1868 NFSACCCHK_VPISLOCKED, NULL); 1869 if (nd->nd_repstat) { 1870 vput(vp); 1871 if (nd->nd_flag & ND_NFSV3) 1872 nfsrv_postopattr(nd, getret, &at); 1873 goto out; 1874 } 1875 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs"); 1876 1877 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1878 again: 1879 eofflag = 0; 1880 if (cookies) { 1881 free((caddr_t)cookies, M_TEMP); 1882 cookies = NULL; 1883 } 1884 1885 iv.iov_base = rbuf; 1886 iv.iov_len = siz; 1887 io.uio_iov = &iv; 1888 io.uio_iovcnt = 1; 1889 io.uio_offset = (off_t)off; 1890 io.uio_resid = siz; 1891 io.uio_segflg = UIO_SYSSPACE; 1892 io.uio_rw = UIO_READ; 1893 io.uio_td = NULL; 1894 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1895 &cookies); 1896 off = (u_int64_t)io.uio_offset; 1897 if (io.uio_resid) 1898 siz -= io.uio_resid; 1899 1900 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1901 1902 if (!cookies && !nd->nd_repstat) 1903 nd->nd_repstat = NFSERR_PERM; 1904 if (!nd->nd_repstat) 1905 nd->nd_repstat = getret; 1906 if (nd->nd_repstat) { 1907 vput(vp); 1908 if (cookies) 1909 free((caddr_t)cookies, M_TEMP); 1910 free((caddr_t)rbuf, M_TEMP); 1911 if (nd->nd_flag & ND_NFSV3) 1912 nfsrv_postopattr(nd, getret, &at); 1913 goto out; 1914 } 1915 /* 1916 * If nothing read, return eof 1917 * rpc reply 1918 */ 1919 if (siz == 0) { 1920 vput(vp); 1921 if (nd->nd_flag & ND_NFSV3) 1922 nfsrv_postopattr(nd, getret, &at); 1923 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1924 txdr_hyper(at.na_filerev, tl); 1925 tl += 2; 1926 *tl++ = newnfs_false; 1927 *tl = newnfs_true; 1928 free((caddr_t)cookies, M_TEMP); 1929 free((caddr_t)rbuf, M_TEMP); 1930 goto out; 1931 } 1932 1933 /* 1934 * Check for degenerate cases of nothing useful read. 1935 * If so go try again 1936 */ 1937 cpos = rbuf; 1938 cend = rbuf + siz; 1939 dp = (struct dirent *)cpos; 1940 cookiep = cookies; 1941 1942 /* 1943 * For some reason FreeBSD's ufs_readdir() chooses to back the 1944 * directory offset up to a block boundary, so it is necessary to 1945 * skip over the records that precede the requested offset. This 1946 * requires the assumption that file offset cookies monotonically 1947 * increase. 1948 * Since the offset cookies don't monotonically increase for ZFS, 1949 * this is not done when ZFS is the file system. 1950 */ 1951 while (cpos < cend && ncookies > 0 && 1952 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1953 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) || 1954 ((nd->nd_flag & ND_NFSV4) && 1955 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1956 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1957 cpos += dp->d_reclen; 1958 dp = (struct dirent *)cpos; 1959 cookiep++; 1960 ncookies--; 1961 } 1962 if (cpos >= cend || ncookies == 0) { 1963 siz = fullsiz; 1964 toff = off; 1965 goto again; 1966 } 1967 1968 /* 1969 * Busy the file system so that the mount point won't go away 1970 * and, as such, VFS_VGET() can be used safely. 1971 */ 1972 mp = vp->v_mount; 1973 vfs_ref(mp); 1974 NFSVOPUNLOCK(vp, 0); 1975 nd->nd_repstat = vfs_busy(mp, 0); 1976 vfs_rel(mp); 1977 if (nd->nd_repstat != 0) { 1978 vrele(vp); 1979 free(cookies, M_TEMP); 1980 free(rbuf, M_TEMP); 1981 if (nd->nd_flag & ND_NFSV3) 1982 nfsrv_postopattr(nd, getret, &at); 1983 goto out; 1984 } 1985 1986 /* 1987 * Save this position, in case there is an error before one entry 1988 * is created. 1989 */ 1990 mb0 = nd->nd_mb; 1991 bpos0 = nd->nd_bpos; 1992 1993 /* 1994 * Fill in the first part of the reply. 1995 * dirlen is the reply length in bytes and cannot exceed cnt. 1996 * (Include the two booleans at the end of the reply in dirlen now, 1997 * so we recognize when we have exceeded cnt.) 1998 */ 1999 if (nd->nd_flag & ND_NFSV3) { 2000 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2001 nfsrv_postopattr(nd, getret, &at); 2002 } else { 2003 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2004 } 2005 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2006 txdr_hyper(at.na_filerev, tl); 2007 2008 /* 2009 * Save this position, in case there is an empty reply needed. 2010 */ 2011 mb1 = nd->nd_mb; 2012 bpos1 = nd->nd_bpos; 2013 2014 /* Loop through the records and build reply */ 2015 entrycnt = 0; 2016 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2017 nlen = dp->d_namlen; 2018 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2019 nlen <= NFS_MAXNAMLEN && 2020 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2021 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2022 || (nlen == 1 && dp->d_name[0] != '.'))) { 2023 /* 2024 * Save the current position in the reply, in case 2025 * this entry exceeds cnt. 2026 */ 2027 mb1 = nd->nd_mb; 2028 bpos1 = nd->nd_bpos; 2029 2030 /* 2031 * For readdir_and_lookup get the vnode using 2032 * the file number. 2033 */ 2034 nvp = NULL; 2035 refp = NULL; 2036 r = 0; 2037 at_root = 0; 2038 needs_unbusy = 0; 2039 new_mp = mp; 2040 mounted_on_fileno = (uint64_t)dp->d_fileno; 2041 if ((nd->nd_flag & ND_NFSV3) || 2042 NFSNONZERO_ATTRBIT(&savbits)) { 2043 if (nd->nd_flag & ND_NFSV4) 2044 refp = nfsv4root_getreferral(NULL, 2045 vp, dp->d_fileno); 2046 if (refp == NULL) { 2047 if (usevget) 2048 r = VFS_VGET(mp, dp->d_fileno, 2049 LK_SHARED, &nvp); 2050 else 2051 r = EOPNOTSUPP; 2052 if (r == EOPNOTSUPP) { 2053 if (usevget) { 2054 usevget = 0; 2055 cn.cn_nameiop = LOOKUP; 2056 cn.cn_lkflags = 2057 LK_SHARED | 2058 LK_RETRY; 2059 cn.cn_cred = 2060 nd->nd_cred; 2061 cn.cn_thread = p; 2062 } 2063 cn.cn_nameptr = dp->d_name; 2064 cn.cn_namelen = nlen; 2065 cn.cn_flags = ISLASTCN | 2066 NOFOLLOW | LOCKLEAF; 2067 if (nlen == 2 && 2068 dp->d_name[0] == '.' && 2069 dp->d_name[1] == '.') 2070 cn.cn_flags |= 2071 ISDOTDOT; 2072 if (NFSVOPLOCK(vp, LK_SHARED) 2073 != 0) { 2074 nd->nd_repstat = EPERM; 2075 break; 2076 } 2077 if ((vp->v_vflag & VV_ROOT) != 0 2078 && (cn.cn_flags & ISDOTDOT) 2079 != 0) { 2080 vref(vp); 2081 nvp = vp; 2082 r = 0; 2083 } else { 2084 r = VOP_LOOKUP(vp, &nvp, 2085 &cn); 2086 if (vp != nvp) 2087 NFSVOPUNLOCK(vp, 2088 0); 2089 } 2090 } 2091 2092 /* 2093 * For NFSv4, check to see if nvp is 2094 * a mount point and get the mount 2095 * point vnode, as required. 2096 */ 2097 if (r == 0 && 2098 nfsrv_enable_crossmntpt != 0 && 2099 (nd->nd_flag & ND_NFSV4) != 0 && 2100 nvp->v_type == VDIR && 2101 nvp->v_mountedhere != NULL) { 2102 new_mp = nvp->v_mountedhere; 2103 r = vfs_busy(new_mp, 0); 2104 vput(nvp); 2105 nvp = NULL; 2106 if (r == 0) { 2107 r = VFS_ROOT(new_mp, 2108 LK_SHARED, &nvp); 2109 needs_unbusy = 1; 2110 if (r == 0) 2111 at_root = 1; 2112 } 2113 } 2114 } 2115 if (!r) { 2116 if (refp == NULL && 2117 ((nd->nd_flag & ND_NFSV3) || 2118 NFSNONZERO_ATTRBIT(&attrbits))) { 2119 r = nfsvno_getfh(nvp, &nfh, p); 2120 if (!r) 2121 r = nfsvno_getattr(nvp, nvap, 2122 nd->nd_cred, p, 1); 2123 } 2124 } else { 2125 nvp = NULL; 2126 } 2127 if (r) { 2128 if (!NFSISSET_ATTRBIT(&attrbits, 2129 NFSATTRBIT_RDATTRERROR)) { 2130 if (nvp != NULL) 2131 vput(nvp); 2132 if (needs_unbusy != 0) 2133 vfs_unbusy(new_mp); 2134 nd->nd_repstat = r; 2135 break; 2136 } 2137 } 2138 } 2139 2140 /* 2141 * Build the directory record xdr 2142 */ 2143 if (nd->nd_flag & ND_NFSV3) { 2144 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2145 *tl++ = newnfs_true; 2146 *tl++ = 0; 2147 *tl = txdr_unsigned(dp->d_fileno); 2148 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2149 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2150 *tl++ = 0; 2151 *tl = txdr_unsigned(*cookiep); 2152 nfsrv_postopattr(nd, 0, nvap); 2153 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2154 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2155 if (nvp != NULL) 2156 vput(nvp); 2157 } else { 2158 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2159 *tl++ = newnfs_true; 2160 *tl++ = 0; 2161 *tl = txdr_unsigned(*cookiep); 2162 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2163 if (nvp != NULL) { 2164 supports_nfsv4acls = 2165 nfs_supportsnfsv4acls(nvp); 2166 NFSVOPUNLOCK(nvp, 0); 2167 } else 2168 supports_nfsv4acls = 0; 2169 if (refp != NULL) { 2170 dirlen += nfsrv_putreferralattr(nd, 2171 &savbits, refp, 0, 2172 &nd->nd_repstat); 2173 if (nd->nd_repstat) { 2174 if (nvp != NULL) 2175 vrele(nvp); 2176 if (needs_unbusy != 0) 2177 vfs_unbusy(new_mp); 2178 break; 2179 } 2180 } else if (r) { 2181 dirlen += nfsvno_fillattr(nd, new_mp, 2182 nvp, nvap, &nfh, r, &rderrbits, 2183 nd->nd_cred, p, isdgram, 0, 2184 supports_nfsv4acls, at_root, 2185 mounted_on_fileno); 2186 } else { 2187 dirlen += nfsvno_fillattr(nd, new_mp, 2188 nvp, nvap, &nfh, r, &attrbits, 2189 nd->nd_cred, p, isdgram, 0, 2190 supports_nfsv4acls, at_root, 2191 mounted_on_fileno); 2192 } 2193 if (nvp != NULL) 2194 vrele(nvp); 2195 dirlen += (3 * NFSX_UNSIGNED); 2196 } 2197 if (needs_unbusy != 0) 2198 vfs_unbusy(new_mp); 2199 if (dirlen <= cnt) 2200 entrycnt++; 2201 } 2202 cpos += dp->d_reclen; 2203 dp = (struct dirent *)cpos; 2204 cookiep++; 2205 ncookies--; 2206 } 2207 vrele(vp); 2208 vfs_unbusy(mp); 2209 2210 /* 2211 * If dirlen > cnt, we must strip off the last entry. If that 2212 * results in an empty reply, report NFSERR_TOOSMALL. 2213 */ 2214 if (dirlen > cnt || nd->nd_repstat) { 2215 if (!nd->nd_repstat && entrycnt == 0) 2216 nd->nd_repstat = NFSERR_TOOSMALL; 2217 if (nd->nd_repstat) 2218 newnfs_trimtrailing(nd, mb0, bpos0); 2219 else 2220 newnfs_trimtrailing(nd, mb1, bpos1); 2221 eofflag = 0; 2222 } else if (cpos < cend) 2223 eofflag = 0; 2224 if (!nd->nd_repstat) { 2225 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2226 *tl++ = newnfs_false; 2227 if (eofflag) 2228 *tl = newnfs_true; 2229 else 2230 *tl = newnfs_false; 2231 } 2232 FREE((caddr_t)cookies, M_TEMP); 2233 FREE((caddr_t)rbuf, M_TEMP); 2234 2235 out: 2236 NFSEXITCODE2(0, nd); 2237 return (0); 2238 nfsmout: 2239 vput(vp); 2240 NFSEXITCODE2(error, nd); 2241 return (error); 2242 } 2243 2244 /* 2245 * Get the settable attributes out of the mbuf list. 2246 * (Return 0 or EBADRPC) 2247 */ 2248 int 2249 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2250 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2251 { 2252 u_int32_t *tl; 2253 struct nfsv2_sattr *sp; 2254 int error = 0, toclient = 0; 2255 2256 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2257 case ND_NFSV2: 2258 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2259 /* 2260 * Some old clients didn't fill in the high order 16bits. 2261 * --> check the low order 2 bytes for 0xffff 2262 */ 2263 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2264 nvap->na_mode = nfstov_mode(sp->sa_mode); 2265 if (sp->sa_uid != newnfs_xdrneg1) 2266 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2267 if (sp->sa_gid != newnfs_xdrneg1) 2268 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2269 if (sp->sa_size != newnfs_xdrneg1) 2270 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2271 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2272 #ifdef notyet 2273 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2274 #else 2275 nvap->na_atime.tv_sec = 2276 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2277 nvap->na_atime.tv_nsec = 0; 2278 #endif 2279 } 2280 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2281 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2282 break; 2283 case ND_NFSV3: 2284 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2285 if (*tl == newnfs_true) { 2286 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2287 nvap->na_mode = nfstov_mode(*tl); 2288 } 2289 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2290 if (*tl == newnfs_true) { 2291 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2292 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2293 } 2294 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2295 if (*tl == newnfs_true) { 2296 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2297 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2298 } 2299 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2300 if (*tl == newnfs_true) { 2301 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2302 nvap->na_size = fxdr_hyper(tl); 2303 } 2304 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2305 switch (fxdr_unsigned(int, *tl)) { 2306 case NFSV3SATTRTIME_TOCLIENT: 2307 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2308 fxdr_nfsv3time(tl, &nvap->na_atime); 2309 toclient = 1; 2310 break; 2311 case NFSV3SATTRTIME_TOSERVER: 2312 vfs_timestamp(&nvap->na_atime); 2313 nvap->na_vaflags |= VA_UTIMES_NULL; 2314 break; 2315 }; 2316 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2317 switch (fxdr_unsigned(int, *tl)) { 2318 case NFSV3SATTRTIME_TOCLIENT: 2319 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2320 fxdr_nfsv3time(tl, &nvap->na_mtime); 2321 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2322 break; 2323 case NFSV3SATTRTIME_TOSERVER: 2324 vfs_timestamp(&nvap->na_mtime); 2325 if (!toclient) 2326 nvap->na_vaflags |= VA_UTIMES_NULL; 2327 break; 2328 }; 2329 break; 2330 case ND_NFSV4: 2331 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2332 }; 2333 nfsmout: 2334 NFSEXITCODE2(error, nd); 2335 return (error); 2336 } 2337 2338 /* 2339 * Handle the setable attributes for V4. 2340 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2341 */ 2342 int 2343 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2344 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2345 { 2346 u_int32_t *tl; 2347 int attrsum = 0; 2348 int i, j; 2349 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2350 int toclient = 0; 2351 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2352 uid_t uid; 2353 gid_t gid; 2354 2355 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2356 if (error) 2357 goto nfsmout; 2358 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2359 attrsize = fxdr_unsigned(int, *tl); 2360 2361 /* 2362 * Loop around getting the setable attributes. If an unsupported 2363 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2364 */ 2365 if (retnotsup) { 2366 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2367 bitpos = NFSATTRBIT_MAX; 2368 } else { 2369 bitpos = 0; 2370 } 2371 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2372 if (attrsum > attrsize) { 2373 error = NFSERR_BADXDR; 2374 goto nfsmout; 2375 } 2376 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2377 switch (bitpos) { 2378 case NFSATTRBIT_SIZE: 2379 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2380 nvap->na_size = fxdr_hyper(tl); 2381 attrsum += NFSX_HYPER; 2382 break; 2383 case NFSATTRBIT_ACL: 2384 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2385 p); 2386 if (error) 2387 goto nfsmout; 2388 if (aceerr && !nd->nd_repstat) 2389 nd->nd_repstat = aceerr; 2390 attrsum += aclsize; 2391 break; 2392 case NFSATTRBIT_ARCHIVE: 2393 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2394 if (!nd->nd_repstat) 2395 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2396 attrsum += NFSX_UNSIGNED; 2397 break; 2398 case NFSATTRBIT_HIDDEN: 2399 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2400 if (!nd->nd_repstat) 2401 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2402 attrsum += NFSX_UNSIGNED; 2403 break; 2404 case NFSATTRBIT_MIMETYPE: 2405 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2406 i = fxdr_unsigned(int, *tl); 2407 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2408 if (error) 2409 goto nfsmout; 2410 if (!nd->nd_repstat) 2411 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2412 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2413 break; 2414 case NFSATTRBIT_MODE: 2415 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2416 nvap->na_mode = nfstov_mode(*tl); 2417 attrsum += NFSX_UNSIGNED; 2418 break; 2419 case NFSATTRBIT_OWNER: 2420 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2421 j = fxdr_unsigned(int, *tl); 2422 if (j < 0) { 2423 error = NFSERR_BADXDR; 2424 goto nfsmout; 2425 } 2426 if (j > NFSV4_SMALLSTR) 2427 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2428 else 2429 cp = namestr; 2430 error = nfsrv_mtostr(nd, cp, j); 2431 if (error) { 2432 if (j > NFSV4_SMALLSTR) 2433 free(cp, M_NFSSTRING); 2434 goto nfsmout; 2435 } 2436 if (!nd->nd_repstat) { 2437 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2438 p); 2439 if (!nd->nd_repstat) 2440 nvap->na_uid = uid; 2441 } 2442 if (j > NFSV4_SMALLSTR) 2443 free(cp, M_NFSSTRING); 2444 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2445 break; 2446 case NFSATTRBIT_OWNERGROUP: 2447 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2448 j = fxdr_unsigned(int, *tl); 2449 if (j < 0) { 2450 error = NFSERR_BADXDR; 2451 goto nfsmout; 2452 } 2453 if (j > NFSV4_SMALLSTR) 2454 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2455 else 2456 cp = namestr; 2457 error = nfsrv_mtostr(nd, cp, j); 2458 if (error) { 2459 if (j > NFSV4_SMALLSTR) 2460 free(cp, M_NFSSTRING); 2461 goto nfsmout; 2462 } 2463 if (!nd->nd_repstat) { 2464 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2465 p); 2466 if (!nd->nd_repstat) 2467 nvap->na_gid = gid; 2468 } 2469 if (j > NFSV4_SMALLSTR) 2470 free(cp, M_NFSSTRING); 2471 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2472 break; 2473 case NFSATTRBIT_SYSTEM: 2474 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2475 if (!nd->nd_repstat) 2476 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2477 attrsum += NFSX_UNSIGNED; 2478 break; 2479 case NFSATTRBIT_TIMEACCESSSET: 2480 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2481 attrsum += NFSX_UNSIGNED; 2482 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2483 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2484 fxdr_nfsv4time(tl, &nvap->na_atime); 2485 toclient = 1; 2486 attrsum += NFSX_V4TIME; 2487 } else { 2488 vfs_timestamp(&nvap->na_atime); 2489 nvap->na_vaflags |= VA_UTIMES_NULL; 2490 } 2491 break; 2492 case NFSATTRBIT_TIMEBACKUP: 2493 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2494 if (!nd->nd_repstat) 2495 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2496 attrsum += NFSX_V4TIME; 2497 break; 2498 case NFSATTRBIT_TIMECREATE: 2499 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2500 if (!nd->nd_repstat) 2501 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2502 attrsum += NFSX_V4TIME; 2503 break; 2504 case NFSATTRBIT_TIMEMODIFYSET: 2505 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2506 attrsum += NFSX_UNSIGNED; 2507 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2508 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2509 fxdr_nfsv4time(tl, &nvap->na_mtime); 2510 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2511 attrsum += NFSX_V4TIME; 2512 } else { 2513 vfs_timestamp(&nvap->na_mtime); 2514 if (!toclient) 2515 nvap->na_vaflags |= VA_UTIMES_NULL; 2516 } 2517 break; 2518 default: 2519 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2520 /* 2521 * set bitpos so we drop out of the loop. 2522 */ 2523 bitpos = NFSATTRBIT_MAX; 2524 break; 2525 }; 2526 } 2527 2528 /* 2529 * some clients pad the attrlist, so we need to skip over the 2530 * padding. 2531 */ 2532 if (attrsum > attrsize) { 2533 error = NFSERR_BADXDR; 2534 } else { 2535 attrsize = NFSM_RNDUP(attrsize); 2536 if (attrsum < attrsize) 2537 error = nfsm_advance(nd, attrsize - attrsum, -1); 2538 } 2539 nfsmout: 2540 NFSEXITCODE2(error, nd); 2541 return (error); 2542 } 2543 2544 /* 2545 * Check/setup export credentials. 2546 */ 2547 int 2548 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2549 struct ucred *credanon) 2550 { 2551 int error = 0; 2552 2553 /* 2554 * Check/setup credentials. 2555 */ 2556 if (nd->nd_flag & ND_GSS) 2557 exp->nes_exflag &= ~MNT_EXPORTANON; 2558 2559 /* 2560 * Check to see if the operation is allowed for this security flavor. 2561 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2562 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2563 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2564 */ 2565 if (nfsvno_testexp(nd, exp) && 2566 nd->nd_procnum != NFSV4OP_SECINFO && 2567 nd->nd_procnum != NFSPROC_FSINFO) { 2568 if (nd->nd_flag & ND_NFSV4) 2569 error = NFSERR_WRONGSEC; 2570 else 2571 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2572 goto out; 2573 } 2574 2575 /* 2576 * Check to see if the file system is exported V4 only. 2577 */ 2578 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2579 error = NFSERR_PROGNOTV4; 2580 goto out; 2581 } 2582 2583 /* 2584 * Now, map the user credentials. 2585 * (Note that ND_AUTHNONE will only be set for an NFSv3 2586 * Fsinfo RPC. If set for anything else, this code might need 2587 * to change.) 2588 */ 2589 if (NFSVNO_EXPORTED(exp) && 2590 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) || 2591 NFSVNO_EXPORTANON(exp) || 2592 (nd->nd_flag & ND_AUTHNONE))) { 2593 nd->nd_cred->cr_uid = credanon->cr_uid; 2594 nd->nd_cred->cr_gid = credanon->cr_gid; 2595 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2596 credanon->cr_groups); 2597 } 2598 2599 out: 2600 NFSEXITCODE2(error, nd); 2601 return (error); 2602 } 2603 2604 /* 2605 * Check exports. 2606 */ 2607 int 2608 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2609 struct ucred **credp) 2610 { 2611 int i, error, *secflavors; 2612 2613 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2614 &exp->nes_numsecflavor, &secflavors); 2615 if (error) { 2616 if (nfs_rootfhset) { 2617 exp->nes_exflag = 0; 2618 exp->nes_numsecflavor = 0; 2619 error = 0; 2620 } 2621 } else { 2622 /* Copy the security flavors. */ 2623 for (i = 0; i < exp->nes_numsecflavor; i++) 2624 exp->nes_secflavors[i] = secflavors[i]; 2625 } 2626 NFSEXITCODE(error); 2627 return (error); 2628 } 2629 2630 /* 2631 * Get a vnode for a file handle and export stuff. 2632 */ 2633 int 2634 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2635 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2636 struct ucred **credp) 2637 { 2638 int i, error, *secflavors; 2639 2640 *credp = NULL; 2641 exp->nes_numsecflavor = 0; 2642 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2643 if (error != 0) 2644 /* Make sure the server replies ESTALE to the client. */ 2645 error = ESTALE; 2646 if (nam && !error) { 2647 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2648 &exp->nes_numsecflavor, &secflavors); 2649 if (error) { 2650 if (nfs_rootfhset) { 2651 exp->nes_exflag = 0; 2652 exp->nes_numsecflavor = 0; 2653 error = 0; 2654 } else { 2655 vput(*vpp); 2656 } 2657 } else { 2658 /* Copy the security flavors. */ 2659 for (i = 0; i < exp->nes_numsecflavor; i++) 2660 exp->nes_secflavors[i] = secflavors[i]; 2661 } 2662 } 2663 NFSEXITCODE(error); 2664 return (error); 2665 } 2666 2667 /* 2668 * nfsd_fhtovp() - convert a fh to a vnode ptr 2669 * - look up fsid in mount list (if not found ret error) 2670 * - get vp and export rights by calling nfsvno_fhtovp() 2671 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2672 * for AUTH_SYS 2673 * - if mpp != NULL, return the mount point so that it can 2674 * be used for vn_finished_write() by the caller 2675 */ 2676 void 2677 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2678 struct vnode **vpp, struct nfsexstuff *exp, 2679 struct mount **mpp, int startwrite, struct thread *p) 2680 { 2681 struct mount *mp; 2682 struct ucred *credanon; 2683 fhandle_t *fhp; 2684 2685 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2686 /* 2687 * Check for the special case of the nfsv4root_fh. 2688 */ 2689 mp = vfs_busyfs(&fhp->fh_fsid); 2690 if (mpp != NULL) 2691 *mpp = mp; 2692 if (mp == NULL) { 2693 *vpp = NULL; 2694 nd->nd_repstat = ESTALE; 2695 goto out; 2696 } 2697 2698 if (startwrite) { 2699 vn_start_write(NULL, mpp, V_WAIT); 2700 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2701 lktype = LK_EXCLUSIVE; 2702 } 2703 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2704 &credanon); 2705 vfs_unbusy(mp); 2706 2707 /* 2708 * For NFSv4 without a pseudo root fs, unexported file handles 2709 * can be returned, so that Lookup works everywhere. 2710 */ 2711 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2712 !(nd->nd_flag & ND_NFSV4)) { 2713 vput(*vpp); 2714 nd->nd_repstat = EACCES; 2715 } 2716 2717 /* 2718 * Personally, I've never seen any point in requiring a 2719 * reserved port#, since only in the rare case where the 2720 * clients are all boxes with secure system priviledges, 2721 * does it provide any enhanced security, but... some people 2722 * believe it to be useful and keep putting this code back in. 2723 * (There is also some "security checker" out there that 2724 * complains if the nfs server doesn't enforce this.) 2725 * However, note the following: 2726 * RFC3530 (NFSv4) specifies that a reserved port# not be 2727 * required. 2728 * RFC2623 recommends that, if a reserved port# is checked for, 2729 * that there be a way to turn that off--> ifdef'd. 2730 */ 2731 #ifdef NFS_REQRSVPORT 2732 if (!nd->nd_repstat) { 2733 struct sockaddr_in *saddr; 2734 struct sockaddr_in6 *saddr6; 2735 2736 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2737 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2738 if (!(nd->nd_flag & ND_NFSV4) && 2739 ((saddr->sin_family == AF_INET && 2740 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2741 (saddr6->sin6_family == AF_INET6 && 2742 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2743 vput(*vpp); 2744 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2745 } 2746 } 2747 #endif /* NFS_REQRSVPORT */ 2748 2749 /* 2750 * Check/setup credentials. 2751 */ 2752 if (!nd->nd_repstat) { 2753 nd->nd_saveduid = nd->nd_cred->cr_uid; 2754 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2755 if (nd->nd_repstat) 2756 vput(*vpp); 2757 } 2758 if (credanon != NULL) 2759 crfree(credanon); 2760 if (nd->nd_repstat) { 2761 if (startwrite) 2762 vn_finished_write(mp); 2763 *vpp = NULL; 2764 if (mpp != NULL) 2765 *mpp = NULL; 2766 } 2767 2768 out: 2769 NFSEXITCODE2(0, nd); 2770 } 2771 2772 /* 2773 * glue for fp. 2774 */ 2775 static int 2776 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2777 { 2778 struct filedesc *fdp; 2779 struct file *fp; 2780 int error = 0; 2781 2782 fdp = p->td_proc->p_fd; 2783 if (fd < 0 || fd >= fdp->fd_nfiles || 2784 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2785 error = EBADF; 2786 goto out; 2787 } 2788 *fpp = fp; 2789 2790 out: 2791 NFSEXITCODE(error); 2792 return (error); 2793 } 2794 2795 /* 2796 * Called from nfssvc() to update the exports list. Just call 2797 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2798 * in the mount list. 2799 */ 2800 int 2801 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2802 { 2803 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2804 int error = 0; 2805 struct nameidata nd; 2806 fhandle_t fh; 2807 2808 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2809 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2810 nfs_rootfhset = 0; 2811 else if (error == 0) { 2812 if (nfsexargp->fspec == NULL) { 2813 error = EPERM; 2814 goto out; 2815 } 2816 /* 2817 * If fspec != NULL, this is the v4root path. 2818 */ 2819 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2820 nfsexargp->fspec, p); 2821 if ((error = namei(&nd)) != 0) 2822 goto out; 2823 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2824 vrele(nd.ni_vp); 2825 if (!error) { 2826 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2827 NFSBCOPY((caddr_t)&fh, 2828 nfs_rootfh.nfsrvfh_data, 2829 sizeof (fhandle_t)); 2830 nfs_rootfhset = 1; 2831 } 2832 } 2833 2834 out: 2835 NFSEXITCODE(error); 2836 return (error); 2837 } 2838 2839 /* 2840 * Get the tcp socket sequence numbers we need. 2841 * (Maybe this should be moved to the tcp sources?) 2842 */ 2843 int 2844 nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap) 2845 { 2846 struct inpcb *inp; 2847 struct tcpcb *tp; 2848 int error = 0; 2849 2850 inp = sotoinpcb(so); 2851 KASSERT(inp != NULL, ("nfsrv_getsocksndseq: inp == NULL")); 2852 INP_RLOCK(inp); 2853 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 2854 INP_RUNLOCK(inp); 2855 error = EPIPE; 2856 goto out; 2857 } 2858 tp = intotcpcb(inp); 2859 if (tp->t_state != TCPS_ESTABLISHED) { 2860 INP_RUNLOCK(inp); 2861 error = EPIPE; 2862 goto out; 2863 } 2864 *maxp = tp->snd_max; 2865 *unap = tp->snd_una; 2866 INP_RUNLOCK(inp); 2867 2868 out: 2869 NFSEXITCODE(error); 2870 return (error); 2871 } 2872 2873 /* 2874 * This function needs to test to see if the system is near its limit 2875 * for memory allocation via malloc() or mget() and return True iff 2876 * either of these resources are near their limit. 2877 * XXX (For now, this is just a stub.) 2878 */ 2879 int nfsrv_testmalloclimit = 0; 2880 int 2881 nfsrv_mallocmget_limit(void) 2882 { 2883 static int printmesg = 0; 2884 static int testval = 1; 2885 2886 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2887 if ((printmesg++ % 100) == 0) 2888 printf("nfsd: malloc/mget near limit\n"); 2889 return (1); 2890 } 2891 return (0); 2892 } 2893 2894 /* 2895 * BSD specific initialization of a mount point. 2896 */ 2897 void 2898 nfsd_mntinit(void) 2899 { 2900 static int inited = 0; 2901 2902 if (inited) 2903 return; 2904 inited = 1; 2905 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2906 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2907 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2908 nfsv4root_mnt.mnt_export = NULL; 2909 TAILQ_INIT(&nfsv4root_opt); 2910 TAILQ_INIT(&nfsv4root_newopt); 2911 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2912 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2913 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2914 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2915 } 2916 2917 /* 2918 * Get a vnode for a file handle, without checking exports, etc. 2919 */ 2920 struct vnode * 2921 nfsvno_getvp(fhandle_t *fhp) 2922 { 2923 struct mount *mp; 2924 struct vnode *vp; 2925 int error; 2926 2927 mp = vfs_busyfs(&fhp->fh_fsid); 2928 if (mp == NULL) 2929 return (NULL); 2930 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2931 vfs_unbusy(mp); 2932 if (error) 2933 return (NULL); 2934 return (vp); 2935 } 2936 2937 /* 2938 * Do a local VOP_ADVLOCK(). 2939 */ 2940 int 2941 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2942 u_int64_t end, struct thread *td) 2943 { 2944 int error = 0; 2945 struct flock fl; 2946 u_int64_t tlen; 2947 2948 if (nfsrv_dolocallocks == 0) 2949 goto out; 2950 2951 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */ 2952 if ((vp->v_iflag & VI_DOOMED) != 0) { 2953 error = EPERM; 2954 goto out; 2955 } 2956 2957 fl.l_whence = SEEK_SET; 2958 fl.l_type = ftype; 2959 fl.l_start = (off_t)first; 2960 if (end == NFS64BITSSET) { 2961 fl.l_len = 0; 2962 } else { 2963 tlen = end - first; 2964 fl.l_len = (off_t)tlen; 2965 } 2966 /* 2967 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2968 * values for all calls, so that all locks will be held by the 2969 * nfsd server. (The nfsd server handles conflicts between the 2970 * various clients.) 2971 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2972 * bytes, so it can't be put in l_sysid. 2973 */ 2974 if (nfsv4_sysid == 0) 2975 nfsv4_sysid = nlm_acquire_next_sysid(); 2976 fl.l_pid = (pid_t)0; 2977 fl.l_sysid = (int)nfsv4_sysid; 2978 2979 NFSVOPUNLOCK(vp, 0); 2980 if (ftype == F_UNLCK) 2981 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 2982 (F_POSIX | F_REMOTE)); 2983 else 2984 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 2985 (F_POSIX | F_REMOTE)); 2986 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2987 2988 out: 2989 NFSEXITCODE(error); 2990 return (error); 2991 } 2992 2993 /* 2994 * Check the nfsv4 root exports. 2995 */ 2996 int 2997 nfsvno_v4rootexport(struct nfsrv_descript *nd) 2998 { 2999 struct ucred *credanon; 3000 int exflags, error = 0, numsecflavor, *secflavors, i; 3001 3002 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3003 &credanon, &numsecflavor, &secflavors); 3004 if (error) { 3005 error = NFSERR_PROGUNAVAIL; 3006 goto out; 3007 } 3008 if (credanon != NULL) 3009 crfree(credanon); 3010 for (i = 0; i < numsecflavor; i++) { 3011 if (secflavors[i] == AUTH_SYS) 3012 nd->nd_flag |= ND_EXAUTHSYS; 3013 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3014 nd->nd_flag |= ND_EXGSS; 3015 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3016 nd->nd_flag |= ND_EXGSSINTEGRITY; 3017 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3018 nd->nd_flag |= ND_EXGSSPRIVACY; 3019 } 3020 3021 out: 3022 NFSEXITCODE(error); 3023 return (error); 3024 } 3025 3026 /* 3027 * Nfs server psuedo system call for the nfsd's 3028 */ 3029 /* 3030 * MPSAFE 3031 */ 3032 static int 3033 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3034 { 3035 struct file *fp; 3036 struct nfsd_addsock_args sockarg; 3037 struct nfsd_nfsd_args nfsdarg; 3038 cap_rights_t rights; 3039 int error; 3040 3041 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3042 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3043 if (error) 3044 goto out; 3045 /* 3046 * Since we don't know what rights might be required, 3047 * pretend that we need them all. It is better to be too 3048 * careful than too reckless. 3049 */ 3050 error = fget(td, sockarg.sock, 3051 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3052 if (error != 0) 3053 goto out; 3054 if (fp->f_type != DTYPE_SOCKET) { 3055 fdrop(fp, td); 3056 error = EPERM; 3057 goto out; 3058 } 3059 error = nfsrvd_addsock(fp); 3060 fdrop(fp, td); 3061 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3062 if (uap->argp == NULL) { 3063 error = EINVAL; 3064 goto out; 3065 } 3066 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3067 sizeof (nfsdarg)); 3068 if (error) 3069 goto out; 3070 error = nfsrvd_nfsd(td, &nfsdarg); 3071 } else { 3072 error = nfssvc_srvcall(td, uap, td->td_ucred); 3073 } 3074 3075 out: 3076 NFSEXITCODE(error); 3077 return (error); 3078 } 3079 3080 static int 3081 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3082 { 3083 struct nfsex_args export; 3084 struct file *fp = NULL; 3085 int stablefd, len; 3086 struct nfsd_clid adminrevoke; 3087 struct nfsd_dumplist dumplist; 3088 struct nfsd_dumpclients *dumpclients; 3089 struct nfsd_dumplocklist dumplocklist; 3090 struct nfsd_dumplocks *dumplocks; 3091 struct nameidata nd; 3092 vnode_t vp; 3093 int error = EINVAL, igotlock; 3094 struct proc *procp; 3095 static int suspend_nfsd = 0; 3096 3097 if (uap->flag & NFSSVC_PUBLICFH) { 3098 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3099 sizeof (fhandle_t)); 3100 error = copyin(uap->argp, 3101 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3102 if (!error) 3103 nfs_pubfhset = 1; 3104 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3105 error = copyin(uap->argp,(caddr_t)&export, 3106 sizeof (struct nfsex_args)); 3107 if (!error) 3108 error = nfsrv_v4rootexport(&export, cred, p); 3109 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3110 nfs_pubfhset = 0; 3111 error = 0; 3112 } else if (uap->flag & NFSSVC_STABLERESTART) { 3113 error = copyin(uap->argp, (caddr_t)&stablefd, 3114 sizeof (int)); 3115 if (!error) 3116 error = fp_getfvp(p, stablefd, &fp, &vp); 3117 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3118 error = EBADF; 3119 if (!error && newnfs_numnfsd != 0) 3120 error = EPERM; 3121 if (!error) { 3122 nfsrv_stablefirst.nsf_fp = fp; 3123 nfsrv_setupstable(p); 3124 } 3125 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3126 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3127 sizeof (struct nfsd_clid)); 3128 if (!error) 3129 error = nfsrv_adminrevoke(&adminrevoke, p); 3130 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3131 error = copyin(uap->argp, (caddr_t)&dumplist, 3132 sizeof (struct nfsd_dumplist)); 3133 if (!error && (dumplist.ndl_size < 1 || 3134 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3135 error = EPERM; 3136 if (!error) { 3137 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3138 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3139 M_TEMP, M_WAITOK); 3140 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3141 error = copyout(dumpclients, 3142 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3143 free((caddr_t)dumpclients, M_TEMP); 3144 } 3145 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3146 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3147 sizeof (struct nfsd_dumplocklist)); 3148 if (!error && (dumplocklist.ndllck_size < 1 || 3149 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3150 error = EPERM; 3151 if (!error) 3152 error = nfsrv_lookupfilename(&nd, 3153 dumplocklist.ndllck_fname, p); 3154 if (!error) { 3155 len = sizeof (struct nfsd_dumplocks) * 3156 dumplocklist.ndllck_size; 3157 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3158 M_TEMP, M_WAITOK); 3159 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3160 dumplocklist.ndllck_size, p); 3161 vput(nd.ni_vp); 3162 error = copyout(dumplocks, 3163 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3164 free((caddr_t)dumplocks, M_TEMP); 3165 } 3166 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3167 procp = p->td_proc; 3168 PROC_LOCK(procp); 3169 nfsd_master_pid = procp->p_pid; 3170 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3171 nfsd_master_start = procp->p_stats->p_start; 3172 nfsd_master_proc = procp; 3173 PROC_UNLOCK(procp); 3174 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3175 NFSLOCKV4ROOTMUTEX(); 3176 if (suspend_nfsd == 0) { 3177 /* Lock out all nfsd threads */ 3178 do { 3179 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3180 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3181 } while (igotlock == 0 && suspend_nfsd == 0); 3182 suspend_nfsd = 1; 3183 } 3184 NFSUNLOCKV4ROOTMUTEX(); 3185 error = 0; 3186 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3187 NFSLOCKV4ROOTMUTEX(); 3188 if (suspend_nfsd != 0) { 3189 nfsv4_unlock(&nfsd_suspend_lock, 0); 3190 suspend_nfsd = 0; 3191 } 3192 NFSUNLOCKV4ROOTMUTEX(); 3193 error = 0; 3194 } 3195 3196 NFSEXITCODE(error); 3197 return (error); 3198 } 3199 3200 /* 3201 * Check exports. 3202 * Returns 0 if ok, 1 otherwise. 3203 */ 3204 int 3205 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3206 { 3207 int i; 3208 3209 /* 3210 * This seems odd, but allow the case where the security flavor 3211 * list is empty. This happens when NFSv4 is traversing non-exported 3212 * file systems. Exported file systems should always have a non-empty 3213 * security flavor list. 3214 */ 3215 if (exp->nes_numsecflavor == 0) 3216 return (0); 3217 3218 for (i = 0; i < exp->nes_numsecflavor; i++) { 3219 /* 3220 * The tests for privacy and integrity must be first, 3221 * since ND_GSS is set for everything but AUTH_SYS. 3222 */ 3223 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3224 (nd->nd_flag & ND_GSSPRIVACY)) 3225 return (0); 3226 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3227 (nd->nd_flag & ND_GSSINTEGRITY)) 3228 return (0); 3229 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3230 (nd->nd_flag & ND_GSS)) 3231 return (0); 3232 if (exp->nes_secflavors[i] == AUTH_SYS && 3233 (nd->nd_flag & ND_GSS) == 0) 3234 return (0); 3235 } 3236 return (1); 3237 } 3238 3239 /* 3240 * Calculate a hash value for the fid in a file handle. 3241 */ 3242 uint32_t 3243 nfsrv_hashfh(fhandle_t *fhp) 3244 { 3245 uint32_t hashval; 3246 3247 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3248 return (hashval); 3249 } 3250 3251 /* 3252 * Signal the userland master nfsd to backup the stable restart file. 3253 */ 3254 void 3255 nfsrv_backupstable(void) 3256 { 3257 struct proc *procp; 3258 3259 if (nfsd_master_proc != NULL) { 3260 procp = pfind(nfsd_master_pid); 3261 /* Try to make sure it is the correct process. */ 3262 if (procp == nfsd_master_proc && 3263 procp->p_stats->p_start.tv_sec == 3264 nfsd_master_start.tv_sec && 3265 procp->p_stats->p_start.tv_usec == 3266 nfsd_master_start.tv_usec && 3267 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3268 kern_psignal(procp, SIGUSR2); 3269 else 3270 nfsd_master_proc = NULL; 3271 3272 if (procp != NULL) 3273 PROC_UNLOCK(procp); 3274 } 3275 } 3276 3277 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3278 3279 /* 3280 * Called once to initialize data structures... 3281 */ 3282 static int 3283 nfsd_modevent(module_t mod, int type, void *data) 3284 { 3285 int error = 0, i; 3286 static int loaded = 0; 3287 3288 switch (type) { 3289 case MOD_LOAD: 3290 if (loaded) 3291 goto out; 3292 newnfs_portinit(); 3293 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3294 snprintf(nfsrchash_table[i].lock_name, 3295 sizeof(nfsrchash_table[i].lock_name), "nfsrc_tcp%d", 3296 i); 3297 mtx_init(&nfsrchash_table[i].mtx, 3298 nfsrchash_table[i].lock_name, NULL, MTX_DEF); 3299 } 3300 mtx_init(&nfsrc_udpmtx, "nfs_udpcache_mutex", NULL, MTX_DEF); 3301 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF); 3302 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL, 3303 MTX_DEF); 3304 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3305 nfsrvd_initcache(); 3306 nfsd_init(); 3307 NFSD_LOCK(); 3308 nfsrvd_init(0); 3309 NFSD_UNLOCK(); 3310 nfsd_mntinit(); 3311 #ifdef VV_DISABLEDELEG 3312 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3313 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3314 #endif 3315 nfsd_call_servertimer = nfsrv_servertimer; 3316 nfsd_call_nfsd = nfssvc_nfsd; 3317 loaded = 1; 3318 break; 3319 3320 case MOD_UNLOAD: 3321 if (newnfs_numnfsd != 0) { 3322 error = EBUSY; 3323 break; 3324 } 3325 3326 #ifdef VV_DISABLEDELEG 3327 vn_deleg_ops.vndeleg_recall = NULL; 3328 vn_deleg_ops.vndeleg_disable = NULL; 3329 #endif 3330 nfsd_call_servertimer = NULL; 3331 nfsd_call_nfsd = NULL; 3332 3333 /* Clean out all NFSv4 state. */ 3334 nfsrv_throwawayallstate(curthread); 3335 3336 /* Clean the NFS server reply cache */ 3337 nfsrvd_cleancache(); 3338 3339 /* Free up the krpc server pool. */ 3340 if (nfsrvd_pool != NULL) 3341 svcpool_destroy(nfsrvd_pool); 3342 3343 /* and get rid of the locks */ 3344 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) 3345 mtx_destroy(&nfsrchash_table[i].mtx); 3346 mtx_destroy(&nfsrc_udpmtx); 3347 mtx_destroy(&nfs_v4root_mutex); 3348 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3349 lockdestroy(&nfsv4root_mnt.mnt_explock); 3350 loaded = 0; 3351 break; 3352 default: 3353 error = EOPNOTSUPP; 3354 break; 3355 } 3356 3357 out: 3358 NFSEXITCODE(error); 3359 return (error); 3360 } 3361 static moduledata_t nfsd_mod = { 3362 "nfsd", 3363 nfsd_modevent, 3364 NULL, 3365 }; 3366 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3367 3368 /* So that loader and kldload(2) can find us, wherever we are.. */ 3369 MODULE_VERSION(nfsd, 1); 3370 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3371 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3372 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3373 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3374 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3375
Cache object: 26980515e0a7f0bbb07acd3f35eb3424
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