nfs_nfsdport.c revision 192574
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: head/sys/fs/nfsserver/nfs_nfsdport.c 192574 2009-05-22 01:15:07Z rmacklem $"); 36 37/* 38 * Functions that perform the vfs operations required by the routines in 39 * nfsd_serv.c. It is hoped that this change will make the server more 40 * portable. 41 */ 42 43#include <fs/nfs/nfsport.h> 44#include <sys/sysctl.h> 45#include <nlm/nlm_prot.h> 46#include <nlm/nlm.h> 47 48extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 49extern int nfsv4root_set; 50extern int nfsrv_useacl; 51extern int newnfs_numnfsd; 52extern struct mount nfsv4root_mnt; 53extern struct nfsrv_stablefirst nfsrv_stablefirst; 54extern void (*nfsd_call_servertimer)(void); 55struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 56NFSDLOCKMUTEX; 57struct mtx nfs_cache_mutex; 58struct mtx nfs_v4root_mutex; 59struct nfsrvfh nfs_rootfh, nfs_pubfh; 60int nfs_pubfhset = 0, nfs_rootfhset = 0; 61static uint32_t nfsv4_sysid = 0; 62 63static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 64 struct ucred *); 65 66static int enable_crossmntpt = 1; 67static int nfs_commit_blks; 68static int nfs_commit_miss; 69extern int nfsrv_issuedelegs; 70extern int nfsrv_dolocallocks; 71 72SYSCTL_DECL(_vfs_newnfs); 73SYSCTL_INT(_vfs_newnfs, OID_AUTO, mirrormnt, CTLFLAG_RW, &enable_crossmntpt, 74 0, "Enable nfsd to cross mount points"); 75SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 76 0, ""); 77SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 78 0, ""); 79SYSCTL_INT(_vfs_newnfs, OID_AUTO, issue_delegations, CTLFLAG_RW, 80 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 81SYSCTL_INT(_vfs_newnfs, OID_AUTO, enable_locallocks, CTLFLAG_RW, 82 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 83 84#define NUM_HEURISTIC 1017 85#define NHUSE_INIT 64 86#define NHUSE_INC 16 87#define NHUSE_MAX 2048 88 89static struct nfsheur { 90 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 91 off_t nh_nextr; /* next offset for sequential detection */ 92 int nh_use; /* use count for selection */ 93 int nh_seqcount; /* heuristic */ 94} nfsheur[NUM_HEURISTIC]; 95 96 97/* 98 * Get attributes into nfsvattr structure. 99 */ 100int 101nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 102 struct thread *p) 103{ 104 int error, lockedit = 0; 105 106 /* Since FreeBSD insists the vnode be locked... */ 107 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { 108 lockedit = 1; 109 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p); 110 } 111 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 112 if (lockedit) 113 NFSVOPUNLOCK(vp, 0, p); 114 return (error); 115} 116 117/* 118 * Get a file handle for a vnode. 119 */ 120int 121nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 122{ 123 int error; 124 125 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 126 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 127 error = VOP_VPTOFH(vp, &fhp->fh_fid); 128 return (error); 129} 130 131/* 132 * Perform access checking for vnodes obtained from file handles that would 133 * refer to files already opened by a Unix client. You cannot just use 134 * vn_writechk() and VOP_ACCESS() for two reasons. 135 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 136 * 2 - The owner is to be given access irrespective of mode bits for some 137 * operations, so that processes that chmod after opening a file don't 138 * break. 139 */ 140int 141nfsvno_accchk(struct vnode *vp, u_int32_t accessbits, struct ucred *cred, 142 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked) 143{ 144 struct vattr vattr; 145 int error = 0, getret = 0; 146 accmode_t accmode; 147 148 /* 149 * Convert accessbits to Vxxx flags. 150 */ 151 if (accessbits & (NFSV4ACE_WRITEDATA | NFSV4ACE_APPENDDATA | 152 NFSV4ACE_ADDFILE | NFSV4ACE_ADDSUBDIRECTORY | 153 NFSV4ACE_DELETECHILD | NFSV4ACE_WRITEATTRIBUTES | 154 NFSV4ACE_DELETE | NFSV4ACE_WRITEACL | NFSV4ACE_WRITEOWNER)) 155 accmode = VWRITE; 156 else if (accessbits & (NFSV4ACE_EXECUTE | NFSV4ACE_SEARCH)) 157 accmode = VEXEC; 158 else 159 accmode = VREAD; 160 161 if (accmode & VWRITE) { 162 /* Just vn_writechk() changed to check rdonly */ 163 /* 164 * Disallow write attempts on read-only file systems; 165 * unless the file is a socket or a block or character 166 * device resident on the file system. 167 */ 168 if (NFSVNO_EXRDONLY(exp) || 169 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 170 switch (vp->v_type) { 171 case VREG: 172 case VDIR: 173 case VLNK: 174 return (EROFS); 175 default: 176 break; 177 } 178 } 179 /* 180 * If there's shared text associated with 181 * the inode, try to free it up once. If 182 * we fail, we can't allow writing. 183 */ 184 if (vp->v_vflag & VV_TEXT) 185 return (ETXTBSY); 186 } 187 if (vpislocked == 0) 188 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p); 189 190#ifdef NFS4_ACL_EXTATTR_NAME 191 /* 192 * Should the override still be applied when ACLs are enabled? 193 */ 194 if (nfsrv_useacl != 0 && NFSHASNFS4ACL(vp->v_mount)) 195 error = nfsrv_aclaccess(vp, accmode, accessbits, cred, p); 196 else 197#endif 198 if (accessbits == NFSV4ACE_READATTRIBUTES) 199 error = 0; 200 else 201 error = VOP_ACCESS(vp, accmode, cred, p); 202 203 /* 204 * Allow certain operations for the owner (reads and writes 205 * on files that are already open). 206 */ 207 if (override != NFSACCCHK_NOOVERRIDE && 208 (error == EPERM || error == EACCES)) { 209 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 210 error = 0; 211 else if (override & NFSACCCHK_ALLOWOWNER) { 212 getret = VOP_GETATTR(vp, &vattr, cred); 213 if (getret == 0 && cred->cr_uid == vattr.va_uid) 214 error = 0; 215 } 216 } 217 if (vpislocked == 0) 218 NFSVOPUNLOCK(vp, 0, p); 219 return (error); 220} 221 222/* 223 * Set attribute(s) vnop. 224 */ 225int 226nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 227 struct thread *p, struct nfsexstuff *exp) 228{ 229 int error; 230 231 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 232 return (error); 233} 234 235/* 236 * Set up nameidata for a lookup() call and do it 237 * For the cases where we are crossing mount points 238 * (looking up the public fh path or the v4 root path when 239 * not using a pseudo-root fs), set/release the Giant lock, 240 * as required. 241 */ 242int 243nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 244 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 245 struct vnode **retdirp) 246{ 247 struct componentname *cnp = &ndp->ni_cnd; 248 int i; 249 struct iovec aiov; 250 struct uio auio; 251 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 252 int error = 0, crossmnt; 253 char *cp; 254 255 *retdirp = NULL; 256 cnp->cn_nameptr = cnp->cn_pnbuf; 257 /* 258 * Extract and set starting directory. 259 */ 260 if (dp->v_type != VDIR) { 261 if (islocked) 262 vput(dp); 263 else 264 vrele(dp); 265 nfsvno_relpathbuf(ndp); 266 return (ENOTDIR); 267 } 268 if (islocked) 269 NFSVOPUNLOCK(dp, 0, p); 270 VREF(dp); 271 *retdirp = dp; 272 if (NFSVNO_EXRDONLY(exp)) 273 cnp->cn_flags |= RDONLY; 274 ndp->ni_segflg = UIO_SYSSPACE; 275 crossmnt = 1; 276 277 if (nd->nd_flag & ND_PUBLOOKUP) { 278 ndp->ni_loopcnt = 0; 279 if (cnp->cn_pnbuf[0] == '/') { 280 vrele(dp); 281 /* 282 * Check for degenerate pathnames here, since lookup() 283 * panics on them. 284 */ 285 for (i = 1; i < ndp->ni_pathlen; i++) 286 if (cnp->cn_pnbuf[i] != '/') 287 break; 288 if (i == ndp->ni_pathlen) { 289 error = NFSERR_ACCES; 290 goto out; 291 } 292 dp = rootvnode; 293 VREF(dp); 294 } 295 } else if ((enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 296 (nd->nd_flag & ND_NFSV4) == 0) { 297 /* 298 * Only cross mount points for NFSv4 when doing a 299 * mount while traversing the file system above 300 * the mount point, unless enable_crossmntpt is set. 301 */ 302 cnp->cn_flags |= NOCROSSMOUNT; 303 crossmnt = 0; 304 } 305 306 /* 307 * Initialize for scan, set ni_startdir and bump ref on dp again 308 * becuase lookup() will dereference ni_startdir. 309 */ 310 311 cnp->cn_thread = p; 312 ndp->ni_startdir = dp; 313 ndp->ni_rootdir = rootvnode; 314 315 if (!lockleaf) 316 cnp->cn_flags |= LOCKLEAF; 317 for (;;) { 318 cnp->cn_nameptr = cnp->cn_pnbuf; 319 /* 320 * Call lookup() to do the real work. If an error occurs, 321 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 322 * we do not have to dereference anything before returning. 323 * In either case ni_startdir will be dereferenced and NULLed 324 * out. 325 */ 326 if (exp->nes_vfslocked) 327 ndp->ni_cnd.cn_flags |= GIANTHELD; 328 error = lookup(ndp); 329 /* 330 * The Giant lock should only change when 331 * crossing mount points. 332 */ 333 if (crossmnt) { 334 exp->nes_vfslocked = 335 (ndp->ni_cnd.cn_flags & GIANTHELD) != 0; 336 ndp->ni_cnd.cn_flags &= ~GIANTHELD; 337 } 338 if (error) 339 break; 340 341 /* 342 * Check for encountering a symbolic link. Trivial 343 * termination occurs if no symlink encountered. 344 */ 345 if ((cnp->cn_flags & ISSYMLINK) == 0) { 346 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 347 nfsvno_relpathbuf(ndp); 348 if (ndp->ni_vp && !lockleaf) 349 NFSVOPUNLOCK(ndp->ni_vp, 0, p); 350 break; 351 } 352 353 /* 354 * Validate symlink 355 */ 356 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 357 NFSVOPUNLOCK(ndp->ni_dvp, 0, p); 358 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 359 error = EINVAL; 360 goto badlink2; 361 } 362 363 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 364 error = ELOOP; 365 goto badlink2; 366 } 367 if (ndp->ni_pathlen > 1) 368 cp = uma_zalloc(namei_zone, M_WAITOK); 369 else 370 cp = cnp->cn_pnbuf; 371 aiov.iov_base = cp; 372 aiov.iov_len = MAXPATHLEN; 373 auio.uio_iov = &aiov; 374 auio.uio_iovcnt = 1; 375 auio.uio_offset = 0; 376 auio.uio_rw = UIO_READ; 377 auio.uio_segflg = UIO_SYSSPACE; 378 auio.uio_td = NULL; 379 auio.uio_resid = MAXPATHLEN; 380 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 381 if (error) { 382 badlink1: 383 if (ndp->ni_pathlen > 1) 384 uma_zfree(namei_zone, cp); 385 badlink2: 386 vrele(ndp->ni_dvp); 387 vput(ndp->ni_vp); 388 break; 389 } 390 linklen = MAXPATHLEN - auio.uio_resid; 391 if (linklen == 0) { 392 error = ENOENT; 393 goto badlink1; 394 } 395 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 396 error = ENAMETOOLONG; 397 goto badlink1; 398 } 399 400 /* 401 * Adjust or replace path 402 */ 403 if (ndp->ni_pathlen > 1) { 404 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 405 uma_zfree(namei_zone, cnp->cn_pnbuf); 406 cnp->cn_pnbuf = cp; 407 } else 408 cnp->cn_pnbuf[linklen] = '\0'; 409 ndp->ni_pathlen += linklen; 410 411 /* 412 * Cleanup refs for next loop and check if root directory 413 * should replace current directory. Normally ni_dvp 414 * becomes the new base directory and is cleaned up when 415 * we loop. Explicitly null pointers after invalidation 416 * to clarify operation. 417 */ 418 vput(ndp->ni_vp); 419 ndp->ni_vp = NULL; 420 421 if (cnp->cn_pnbuf[0] == '/') { 422 vrele(ndp->ni_dvp); 423 ndp->ni_dvp = ndp->ni_rootdir; 424 VREF(ndp->ni_dvp); 425 } 426 ndp->ni_startdir = ndp->ni_dvp; 427 ndp->ni_dvp = NULL; 428 } 429 if (!lockleaf) 430 cnp->cn_flags &= ~LOCKLEAF; 431 432out: 433 if (error) { 434 uma_zfree(namei_zone, cnp->cn_pnbuf); 435 ndp->ni_vp = NULL; 436 ndp->ni_dvp = NULL; 437 ndp->ni_startdir = NULL; 438 cnp->cn_flags &= ~HASBUF; 439 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 440 ndp->ni_dvp = NULL; 441 } 442 return (error); 443} 444 445/* 446 * Set up a pathname buffer and return a pointer to it and, optionally 447 * set a hash pointer. 448 */ 449void 450nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 451{ 452 struct componentname *cnp = &ndp->ni_cnd; 453 454 cnp->cn_flags |= (NOMACCHECK | HASBUF); 455 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 456 if (hashpp != NULL) 457 *hashpp = NULL; 458 *bufpp = cnp->cn_pnbuf; 459} 460 461/* 462 * Release the above path buffer, if not released by nfsvno_namei(). 463 */ 464void 465nfsvno_relpathbuf(struct nameidata *ndp) 466{ 467 468 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 469 panic("nfsrelpath"); 470 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 471 ndp->ni_cnd.cn_flags &= ~HASBUF; 472} 473 474/* 475 * Readlink vnode op into an mbuf list. 476 */ 477int 478nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 479 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 480{ 481 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 482 struct iovec *ivp = iv; 483 struct uio io, *uiop = &io; 484 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 485 int i, len, tlen, error; 486 487 len = 0; 488 i = 0; 489 while (len < NFS_MAXPATHLEN) { 490 NFSMGET(mp); 491 MCLGET(mp, M_WAIT); 492 mp->m_len = NFSMSIZ(mp); 493 if (len == 0) { 494 mp3 = mp2 = mp; 495 } else { 496 mp2->m_next = mp; 497 mp2 = mp; 498 } 499 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 500 mp->m_len = NFS_MAXPATHLEN - len; 501 len = NFS_MAXPATHLEN; 502 } else { 503 len += mp->m_len; 504 } 505 ivp->iov_base = mtod(mp, caddr_t); 506 ivp->iov_len = mp->m_len; 507 i++; 508 ivp++; 509 } 510 uiop->uio_iov = iv; 511 uiop->uio_iovcnt = i; 512 uiop->uio_offset = 0; 513 uiop->uio_resid = len; 514 uiop->uio_rw = UIO_READ; 515 uiop->uio_segflg = UIO_SYSSPACE; 516 uiop->uio_td = NULL; 517 error = VOP_READLINK(vp, uiop, cred); 518 if (error) { 519 m_freem(mp3); 520 *lenp = 0; 521 return (error); 522 } 523 if (uiop->uio_resid > 0) { 524 len -= uiop->uio_resid; 525 tlen = NFSM_RNDUP(len); 526 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 527 } 528 *lenp = len; 529 *mpp = mp3; 530 *mpendp = mp; 531 return (0); 532} 533 534/* 535 * Read vnode op call into mbuf list. 536 */ 537int 538nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 539 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 540{ 541 struct mbuf *m; 542 int i; 543 struct iovec *iv; 544 struct iovec *iv2; 545 int error = 0, len, left, siz, tlen, ioflag = 0, hi, try = 32; 546 struct mbuf *m2 = NULL, *m3; 547 struct uio io, *uiop = &io; 548 struct nfsheur *nh; 549 550 /* 551 * Calculate seqcount for heuristic 552 */ 553 /* 554 * Locate best candidate 555 */ 556 557 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 558 nh = &nfsheur[hi]; 559 560 while (try--) { 561 if (nfsheur[hi].nh_vp == vp) { 562 nh = &nfsheur[hi]; 563 break; 564 } 565 if (nfsheur[hi].nh_use > 0) 566 --nfsheur[hi].nh_use; 567 hi = (hi + 1) % NUM_HEURISTIC; 568 if (nfsheur[hi].nh_use < nh->nh_use) 569 nh = &nfsheur[hi]; 570 } 571 572 if (nh->nh_vp != vp) { 573 nh->nh_vp = vp; 574 nh->nh_nextr = off; 575 nh->nh_use = NHUSE_INIT; 576 if (off == 0) 577 nh->nh_seqcount = 4; 578 else 579 nh->nh_seqcount = 1; 580 } 581 582 /* 583 * Calculate heuristic 584 */ 585 586 if ((off == 0 && nh->nh_seqcount > 0) || off == nh->nh_nextr) { 587 if (++nh->nh_seqcount > IO_SEQMAX) 588 nh->nh_seqcount = IO_SEQMAX; 589 } else if (nh->nh_seqcount > 1) { 590 nh->nh_seqcount = 1; 591 } else { 592 nh->nh_seqcount = 0; 593 } 594 nh->nh_use += NHUSE_INC; 595 if (nh->nh_use > NHUSE_MAX) 596 nh->nh_use = NHUSE_MAX; 597 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 598 599 len = left = NFSM_RNDUP(cnt); 600 m3 = NULL; 601 /* 602 * Generate the mbuf list with the uio_iov ref. to it. 603 */ 604 i = 0; 605 while (left > 0) { 606 NFSMGET(m); 607 MCLGET(m, M_WAIT); 608 m->m_len = 0; 609 siz = min(M_TRAILINGSPACE(m), left); 610 left -= siz; 611 i++; 612 if (m3) 613 m2->m_next = m; 614 else 615 m3 = m; 616 m2 = m; 617 } 618 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 619 M_TEMP, M_WAITOK); 620 uiop->uio_iov = iv2 = iv; 621 m = m3; 622 left = len; 623 i = 0; 624 while (left > 0) { 625 if (m == NULL) 626 panic("nfsvno_read iov"); 627 siz = min(M_TRAILINGSPACE(m), left); 628 if (siz > 0) { 629 iv->iov_base = mtod(m, caddr_t) + m->m_len; 630 iv->iov_len = siz; 631 m->m_len += siz; 632 left -= siz; 633 iv++; 634 i++; 635 } 636 m = m->m_next; 637 } 638 uiop->uio_iovcnt = i; 639 uiop->uio_offset = off; 640 uiop->uio_resid = len; 641 uiop->uio_rw = UIO_READ; 642 uiop->uio_segflg = UIO_SYSSPACE; 643 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 644 FREE((caddr_t)iv2, M_TEMP); 645 if (error) { 646 m_freem(m3); 647 *mpp = NULL; 648 return (error); 649 } 650 tlen = len - uiop->uio_resid; 651 cnt = cnt < tlen ? cnt : tlen; 652 tlen = NFSM_RNDUP(cnt); 653 if (tlen == 0) { 654 m_freem(m3); 655 m3 = NULL; 656 } else if (len != tlen || tlen != cnt) 657 nfsrv_adj(m3, len - tlen, tlen - cnt); 658 *mpp = m3; 659 *mpendp = m2; 660 return (0); 661} 662 663/* 664 * Write vnode op from an mbuf list. 665 */ 666int 667nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 668 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 669{ 670 struct iovec *ivp; 671 int i, len; 672 struct iovec *iv; 673 int ioflags, error; 674 struct uio io, *uiop = &io; 675 676 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 677 M_WAITOK); 678 uiop->uio_iov = iv = ivp; 679 uiop->uio_iovcnt = cnt; 680 i = mtod(mp, caddr_t) + mp->m_len - cp; 681 len = retlen; 682 while (len > 0) { 683 if (mp == NULL) 684 panic("nfsvno_write"); 685 if (i > 0) { 686 i = min(i, len); 687 ivp->iov_base = cp; 688 ivp->iov_len = i; 689 ivp++; 690 len -= i; 691 } 692 mp = mp->m_next; 693 if (mp) { 694 i = mp->m_len; 695 cp = mtod(mp, caddr_t); 696 } 697 } 698 699 if (stable == NFSWRITE_UNSTABLE) 700 ioflags = IO_NODELOCKED; 701 else 702 ioflags = (IO_SYNC | IO_NODELOCKED); 703 uiop->uio_resid = retlen; 704 uiop->uio_rw = UIO_WRITE; 705 uiop->uio_segflg = UIO_SYSSPACE; 706 NFSUIOPROC(uiop, p); 707 uiop->uio_offset = off; 708 error = VOP_WRITE(vp, uiop, ioflags, cred); 709 FREE((caddr_t)iv, M_TEMP); 710 return (error); 711} 712 713/* 714 * Common code for creating a regular file (plus special files for V2). 715 */ 716int 717nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 718 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 719 u_char *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 720{ 721 u_quad_t tempsize; 722 int error; 723 724 error = nd->nd_repstat; 725 if (!error && ndp->ni_vp == NULL) { 726 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 727 vrele(ndp->ni_startdir); 728 error = VOP_CREATE(ndp->ni_dvp, 729 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 730 vput(ndp->ni_dvp); 731 nfsvno_relpathbuf(ndp); 732 if (!error) { 733 if (*exclusive_flagp) { 734 *exclusive_flagp = 0; 735 NFSVNO_ATTRINIT(nvap); 736 NFSBCOPY(cverf,(caddr_t)&nvap->na_atime, 737 NFSX_VERF); 738 error = VOP_SETATTR(ndp->ni_vp, 739 &nvap->na_vattr, nd->nd_cred); 740 } 741 } 742 /* 743 * NFS V2 Only. nfsrvd_mknod() does this for V3. 744 * (This implies, just get out on an error.) 745 */ 746 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 747 nvap->na_type == VFIFO) { 748 if (nvap->na_type == VCHR && rdev == 0xffffffff) 749 nvap->na_type = VFIFO; 750 if (nvap->na_type != VFIFO && 751 (error = priv_check_cred(nd->nd_cred, 752 PRIV_VFS_MKNOD_DEV, 0))) { 753 vrele(ndp->ni_startdir); 754 nfsvno_relpathbuf(ndp); 755 vput(ndp->ni_dvp); 756 return (error); 757 } 758 nvap->na_rdev = rdev; 759 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 760 &ndp->ni_cnd, &nvap->na_vattr); 761 vput(ndp->ni_dvp); 762 nfsvno_relpathbuf(ndp); 763 if (error) { 764 vrele(ndp->ni_startdir); 765 return (error); 766 } 767 } else { 768 vrele(ndp->ni_startdir); 769 nfsvno_relpathbuf(ndp); 770 vput(ndp->ni_dvp); 771 return (ENXIO); 772 } 773 *vpp = ndp->ni_vp; 774 } else { 775 /* 776 * Handle cases where error is already set and/or 777 * the file exists. 778 * 1 - clean up the lookup 779 * 2 - iff !error and na_size set, truncate it 780 */ 781 vrele(ndp->ni_startdir); 782 nfsvno_relpathbuf(ndp); 783 *vpp = ndp->ni_vp; 784 if (ndp->ni_dvp == *vpp) 785 vrele(ndp->ni_dvp); 786 else 787 vput(ndp->ni_dvp); 788 if (!error && nvap->na_size != VNOVAL) { 789 error = nfsvno_accchk(*vpp, NFSV4ACE_ADDFILE, 790 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 791 NFSACCCHK_VPISLOCKED); 792 if (!error) { 793 tempsize = nvap->na_size; 794 NFSVNO_ATTRINIT(nvap); 795 nvap->na_size = tempsize; 796 error = VOP_SETATTR(*vpp, 797 &nvap->na_vattr, nd->nd_cred); 798 } 799 } 800 if (error) 801 vput(*vpp); 802 } 803 return (error); 804} 805 806/* 807 * Do a mknod vnode op. 808 */ 809int 810nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 811 struct thread *p) 812{ 813 int error = 0; 814 enum vtype vtyp; 815 816 vtyp = nvap->na_type; 817 /* 818 * Iff doesn't exist, create it. 819 */ 820 if (ndp->ni_vp) { 821 vrele(ndp->ni_startdir); 822 nfsvno_relpathbuf(ndp); 823 vput(ndp->ni_dvp); 824 vrele(ndp->ni_vp); 825 return (EEXIST); 826 } 827 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 828 vrele(ndp->ni_startdir); 829 nfsvno_relpathbuf(ndp); 830 vput(ndp->ni_dvp); 831 return (NFSERR_BADTYPE); 832 } 833 if (vtyp == VSOCK) { 834 vrele(ndp->ni_startdir); 835 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 836 &ndp->ni_cnd, &nvap->na_vattr); 837 vput(ndp->ni_dvp); 838 nfsvno_relpathbuf(ndp); 839 } else { 840 if (nvap->na_type != VFIFO && 841 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 842 vrele(ndp->ni_startdir); 843 nfsvno_relpathbuf(ndp); 844 vput(ndp->ni_dvp); 845 return (error); 846 } 847 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 848 &ndp->ni_cnd, &nvap->na_vattr); 849 vput(ndp->ni_dvp); 850 nfsvno_relpathbuf(ndp); 851 if (error) 852 vrele(ndp->ni_startdir); 853 /* 854 * Since VOP_MKNOD returns the ni_vp, I can't 855 * see any reason to do the lookup. 856 */ 857 } 858 return (error); 859} 860 861/* 862 * Mkdir vnode op. 863 */ 864int 865nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 866 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 867{ 868 int error = 0; 869 870 if (ndp->ni_vp != NULL) { 871 if (ndp->ni_dvp == ndp->ni_vp) 872 vrele(ndp->ni_dvp); 873 else 874 vput(ndp->ni_dvp); 875 vrele(ndp->ni_vp); 876 return (EEXIST); 877 } 878 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 879 &nvap->na_vattr); 880 vput(ndp->ni_dvp); 881 nfsvno_relpathbuf(ndp); 882 return (error); 883} 884 885/* 886 * symlink vnode op. 887 */ 888int 889nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 890 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 891 struct nfsexstuff *exp) 892{ 893 int error = 0; 894 895 if (ndp->ni_vp) { 896 vrele(ndp->ni_startdir); 897 nfsvno_relpathbuf(ndp); 898 if (ndp->ni_dvp == ndp->ni_vp) 899 vrele(ndp->ni_dvp); 900 else 901 vput(ndp->ni_dvp); 902 vrele(ndp->ni_vp); 903 return (EEXIST); 904 } 905 906 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 907 &nvap->na_vattr, pathcp); 908 vput(ndp->ni_dvp); 909 vrele(ndp->ni_startdir); 910 nfsvno_relpathbuf(ndp); 911 /* 912 * Although FreeBSD still had the lookup code in 913 * it for 7/current, there doesn't seem to be any 914 * point, since VOP_SYMLINK() returns the ni_vp. 915 * Just vput it for v2. 916 */ 917 if (!not_v2 && !error) 918 vput(ndp->ni_vp); 919 return (error); 920} 921 922/* 923 * Parse symbolic link arguments. 924 * This function has an ugly side effect. It will MALLOC() an area for 925 * the symlink and set iov_base to point to it, only if it succeeds. 926 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 927 * be FREE'd later. 928 */ 929int 930nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 931 struct thread *p, char **pathcpp, int *lenp) 932{ 933 u_int32_t *tl; 934 char *pathcp = NULL; 935 int error = 0, len; 936 struct nfsv2_sattr *sp; 937 938 *pathcpp = NULL; 939 *lenp = 0; 940 if ((nd->nd_flag & ND_NFSV3) && 941 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p))) 942 goto nfsmout; 943 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 944 len = fxdr_unsigned(int, *tl); 945 if (len > NFS_MAXPATHLEN || len <= 0) { 946 error = EBADRPC; 947 goto nfsmout; 948 } 949 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 950 error = nfsrv_mtostr(nd, pathcp, len); 951 if (error) 952 goto nfsmout; 953 if (nd->nd_flag & ND_NFSV2) { 954 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 955 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 956 } 957 *pathcpp = pathcp; 958 *lenp = len; 959 return (0); 960nfsmout: 961 if (pathcp) 962 free(pathcp, M_TEMP); 963 return (error); 964} 965 966/* 967 * Remove a non-directory object. 968 */ 969int 970nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 971 struct thread *p, struct nfsexstuff *exp) 972{ 973 struct vnode *vp; 974 int error = 0; 975 976 vp = ndp->ni_vp; 977 if (vp->v_type == VDIR) 978 error = NFSERR_ISDIR; 979 else if (is_v4) 980 error = nfsrv_checkremove(vp, 1, p); 981 if (!error) 982 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 983 if (ndp->ni_dvp == vp) 984 vrele(ndp->ni_dvp); 985 else 986 vput(ndp->ni_dvp); 987 vput(vp); 988 return (error); 989} 990 991/* 992 * Remove a directory. 993 */ 994int 995nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 996 struct thread *p, struct nfsexstuff *exp) 997{ 998 struct vnode *vp; 999 int error = 0; 1000 1001 vp = ndp->ni_vp; 1002 if (vp->v_type != VDIR) { 1003 error = ENOTDIR; 1004 goto out; 1005 } 1006 /* 1007 * No rmdir "." please. 1008 */ 1009 if (ndp->ni_dvp == vp) { 1010 error = EINVAL; 1011 goto out; 1012 } 1013 /* 1014 * The root of a mounted filesystem cannot be deleted. 1015 */ 1016 if (vp->v_vflag & VV_ROOT) 1017 error = EBUSY; 1018out: 1019 if (!error) 1020 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1021 if (ndp->ni_dvp == vp) 1022 vrele(ndp->ni_dvp); 1023 else 1024 vput(ndp->ni_dvp); 1025 vput(vp); 1026 return (error); 1027} 1028 1029/* 1030 * Rename vnode op. 1031 */ 1032int 1033nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1034 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1035{ 1036 struct vnode *fvp, *tvp, *tdvp; 1037 int error = 0; 1038 1039 fvp = fromndp->ni_vp; 1040 if (ndstat) { 1041 vrele(fromndp->ni_dvp); 1042 vrele(fvp); 1043 error = ndstat; 1044 goto out1; 1045 } 1046 tdvp = tondp->ni_dvp; 1047 tvp = tondp->ni_vp; 1048 if (tvp != NULL) { 1049 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1050 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1051 goto out; 1052 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1053 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1054 goto out; 1055 } 1056 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1057 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1058 goto out; 1059 } 1060 1061 /* 1062 * A rename to '.' or '..' results in a prematurely 1063 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1064 * here. 1065 */ 1066 if ((tondp->ni_cnd.cn_namelen == 1 && 1067 tondp->ni_cnd.cn_nameptr[0] == '.') || 1068 (tondp->ni_cnd.cn_namelen == 2 && 1069 tondp->ni_cnd.cn_nameptr[0] == '.' && 1070 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1071 error = EINVAL; 1072 goto out; 1073 } 1074 } 1075 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1076 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1077 goto out; 1078 } 1079 if (fvp->v_mount != tdvp->v_mount) { 1080 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1081 goto out; 1082 } 1083 if (fvp == tdvp) { 1084 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1085 goto out; 1086 } 1087 if (fvp == tvp) { 1088 /* 1089 * If source and destination are the same, there is nothing to 1090 * do. Set error to -1 to indicate this. 1091 */ 1092 error = -1; 1093 goto out; 1094 } 1095 if (ndflag & ND_NFSV4) { 1096 NFSVOPLOCK(fvp, LK_EXCLUSIVE | LK_RETRY, p); 1097 error = nfsrv_checkremove(fvp, 0, p); 1098 NFSVOPUNLOCK(fvp, 0, p); 1099 if (tvp && !error) 1100 error = nfsrv_checkremove(tvp, 1, p); 1101 } else { 1102 /* 1103 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1104 * that the NFSv4 client won't be confused by the rename. 1105 * Since nfsd_recalldelegation() can only be called on an 1106 * unlocked vnode at this point and fvp is the file that will 1107 * still exist after the rename, just do fvp. 1108 */ 1109 nfsd_recalldelegation(fvp, p); 1110 } 1111out: 1112 if (!error) { 1113 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1114 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1115 &tondp->ni_cnd); 1116 } else { 1117 if (tdvp == tvp) 1118 vrele(tdvp); 1119 else 1120 vput(tdvp); 1121 if (tvp) 1122 vput(tvp); 1123 vrele(fromndp->ni_dvp); 1124 vrele(fvp); 1125 if (error == -1) 1126 error = 0; 1127 } 1128 vrele(tondp->ni_startdir); 1129 nfsvno_relpathbuf(tondp); 1130out1: 1131 vrele(fromndp->ni_startdir); 1132 nfsvno_relpathbuf(fromndp); 1133 return (error); 1134} 1135 1136/* 1137 * Link vnode op. 1138 */ 1139int 1140nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1141 struct thread *p, struct nfsexstuff *exp) 1142{ 1143 struct vnode *xp; 1144 int error = 0; 1145 1146 xp = ndp->ni_vp; 1147 if (xp != NULL) { 1148 error = EEXIST; 1149 } else { 1150 xp = ndp->ni_dvp; 1151 if (vp->v_mount != xp->v_mount) 1152 error = EXDEV; 1153 } 1154 if (!error) { 1155 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p); 1156 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1157 if (ndp->ni_dvp == vp) 1158 vrele(ndp->ni_dvp); 1159 else 1160 vput(ndp->ni_dvp); 1161 NFSVOPUNLOCK(vp, 0, p); 1162 } else { 1163 if (ndp->ni_dvp == ndp->ni_vp) 1164 vrele(ndp->ni_dvp); 1165 else 1166 vput(ndp->ni_dvp); 1167 if (ndp->ni_vp) 1168 vrele(ndp->ni_vp); 1169 } 1170 nfsvno_relpathbuf(ndp); 1171 return (error); 1172} 1173 1174/* 1175 * Do the fsync() appropriate for the commit. 1176 */ 1177int 1178nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1179 struct thread *td) 1180{ 1181 int error = 0; 1182 1183 if (cnt > MAX_COMMIT_COUNT) { 1184 /* 1185 * Give up and do the whole thing 1186 */ 1187 if (vp->v_object && 1188 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1189 VM_OBJECT_LOCK(vp->v_object); 1190 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1191 VM_OBJECT_UNLOCK(vp->v_object); 1192 } 1193 error = VOP_FSYNC(vp, MNT_WAIT, td); 1194 } else { 1195 /* 1196 * Locate and synchronously write any buffers that fall 1197 * into the requested range. Note: we are assuming that 1198 * f_iosize is a power of 2. 1199 */ 1200 int iosize = vp->v_mount->mnt_stat.f_iosize; 1201 int iomask = iosize - 1; 1202 struct bufobj *bo; 1203 daddr_t lblkno; 1204 1205 /* 1206 * Align to iosize boundry, super-align to page boundry. 1207 */ 1208 if (off & iomask) { 1209 cnt += off & iomask; 1210 off &= ~(u_quad_t)iomask; 1211 } 1212 if (off & PAGE_MASK) { 1213 cnt += off & PAGE_MASK; 1214 off &= ~(u_quad_t)PAGE_MASK; 1215 } 1216 lblkno = off / iosize; 1217 1218 if (vp->v_object && 1219 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1220 VM_OBJECT_LOCK(vp->v_object); 1221 vm_object_page_clean(vp->v_object, off / PAGE_SIZE, (cnt + PAGE_MASK) / PAGE_SIZE, OBJPC_SYNC); 1222 VM_OBJECT_UNLOCK(vp->v_object); 1223 } 1224 1225 bo = &vp->v_bufobj; 1226 BO_LOCK(bo); 1227 while (cnt > 0) { 1228 struct buf *bp; 1229 1230 /* 1231 * If we have a buffer and it is marked B_DELWRI we 1232 * have to lock and write it. Otherwise the prior 1233 * write is assumed to have already been committed. 1234 * 1235 * gbincore() can return invalid buffers now so we 1236 * have to check that bit as well (though B_DELWRI 1237 * should not be set if B_INVAL is set there could be 1238 * a race here since we haven't locked the buffer). 1239 */ 1240 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1241 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1242 LK_INTERLOCK, BO_MTX(bo)) == ENOLCK) { 1243 BO_LOCK(bo); 1244 continue; /* retry */ 1245 } 1246 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1247 B_DELWRI) { 1248 bremfree(bp); 1249 bp->b_flags &= ~B_ASYNC; 1250 bwrite(bp); 1251 ++nfs_commit_miss; 1252 } else 1253 BUF_UNLOCK(bp); 1254 BO_LOCK(bo); 1255 } 1256 ++nfs_commit_blks; 1257 if (cnt < iosize) 1258 break; 1259 cnt -= iosize; 1260 ++lblkno; 1261 } 1262 BO_UNLOCK(bo); 1263 } 1264 return (error); 1265} 1266 1267/* 1268 * Statfs vnode op. 1269 */ 1270int 1271nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1272{ 1273 1274 return (VFS_STATFS(vp->v_mount, sf)); 1275} 1276 1277/* 1278 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1279 * must handle nfsrv_opencheck() calls after any other access checks. 1280 */ 1281void 1282nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1283 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1284 int *exclusive_flagp, struct nfsvattr *nvap, u_char *cverf, int create, 1285 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1286 struct nfsexstuff *exp, struct vnode **vpp) 1287{ 1288 struct vnode *vp = NULL; 1289 u_quad_t tempsize; 1290 struct nfsexstuff nes; 1291 1292 if (ndp->ni_vp == NULL) 1293 nd->nd_repstat = nfsrv_opencheck(clientid, 1294 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1295 if (!nd->nd_repstat) { 1296 if (ndp->ni_vp == NULL) { 1297 vrele(ndp->ni_startdir); 1298 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1299 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1300 vput(ndp->ni_dvp); 1301 nfsvno_relpathbuf(ndp); 1302 if (!nd->nd_repstat) { 1303 if (*exclusive_flagp) { 1304 *exclusive_flagp = 0; 1305 NFSVNO_ATTRINIT(nvap); 1306 NFSBCOPY(cverf, 1307 (caddr_t)&nvap->na_atime, 1308 NFSX_VERF); 1309 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1310 &nvap->na_vattr, cred); 1311 } else { 1312 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1313 aclp, p, attrbitp, exp); 1314 } 1315 } 1316 vp = ndp->ni_vp; 1317 } else { 1318 if (ndp->ni_startdir) 1319 vrele(ndp->ni_startdir); 1320 nfsvno_relpathbuf(ndp); 1321 vp = ndp->ni_vp; 1322 if (create == NFSV4OPEN_CREATE) { 1323 if (ndp->ni_dvp == vp) 1324 vrele(ndp->ni_dvp); 1325 else 1326 vput(ndp->ni_dvp); 1327 } 1328 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1329 if (ndp->ni_cnd.cn_flags & RDONLY) 1330 NFSVNO_SETEXRDONLY(&nes); 1331 else 1332 NFSVNO_EXINIT(&nes); 1333 nd->nd_repstat = nfsvno_accchk(vp, 1334 NFSV4ACE_ADDFILE, cred, &nes, p, 1335 NFSACCCHK_NOOVERRIDE,NFSACCCHK_VPISLOCKED); 1336 nd->nd_repstat = nfsrv_opencheck(clientid, 1337 stateidp, stp, vp, nd, p, nd->nd_repstat); 1338 if (!nd->nd_repstat) { 1339 tempsize = nvap->na_size; 1340 NFSVNO_ATTRINIT(nvap); 1341 nvap->na_size = tempsize; 1342 nd->nd_repstat = VOP_SETATTR(vp, 1343 &nvap->na_vattr, cred); 1344 } 1345 } else if (vp->v_type == VREG) { 1346 nd->nd_repstat = nfsrv_opencheck(clientid, 1347 stateidp, stp, vp, nd, p, nd->nd_repstat); 1348 } 1349 } 1350 } else { 1351 if (ndp->ni_cnd.cn_flags & HASBUF) 1352 nfsvno_relpathbuf(ndp); 1353 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1354 vrele(ndp->ni_startdir); 1355 if (ndp->ni_dvp == ndp->ni_vp) 1356 vrele(ndp->ni_dvp); 1357 else 1358 vput(ndp->ni_dvp); 1359 if (ndp->ni_vp) 1360 vput(ndp->ni_vp); 1361 } 1362 } 1363 *vpp = vp; 1364} 1365 1366/* 1367 * Updates the file rev and sets the mtime and ctime 1368 * to the current clock time, returning the va_filerev and va_Xtime 1369 * values. 1370 */ 1371void 1372nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1373 struct ucred *cred, struct thread *p) 1374{ 1375 struct vattr va; 1376 1377 VATTR_NULL(&va); 1378 getnanotime(&va.va_mtime); 1379 (void) VOP_SETATTR(vp, &va, cred); 1380 (void) nfsvno_getattr(vp, nvap, cred, p); 1381} 1382 1383/* 1384 * Glue routine to nfsv4_fillattr(). 1385 */ 1386int 1387nfsvno_fillattr(struct nfsrv_descript *nd, struct vnode *vp, 1388 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1389 struct ucred *cred, struct thread *p, int isdgram, int reterr) 1390{ 1391 int error; 1392 1393 error = nfsv4_fillattr(nd, vp, NULL, &nvap->na_vattr, fhp, rderror, 1394 attrbitp, cred, p, isdgram, reterr); 1395 return (error); 1396} 1397 1398/* Since the Readdir vnode ops vary, put the entire functions in here. */ 1399/* 1400 * nfs readdir service 1401 * - mallocs what it thinks is enough to read 1402 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1403 * - calls nfsvno_readdir() 1404 * - loops around building the reply 1405 * if the output generated exceeds count break out of loop 1406 * The NFSM_CLGET macro is used here so that the reply will be packed 1407 * tightly in mbuf clusters. 1408 * - it only knows that it has encountered eof when the nfsvno_readdir() 1409 * reads nothing 1410 * - as such one readdir rpc will return eof false although you are there 1411 * and then the next will return eof 1412 * - it trims out records with d_fileno == 0 1413 * this doesn't matter for Unix clients, but they might confuse clients 1414 * for other os'. 1415 * - it trims out records with d_type == DT_WHT 1416 * these cannot be seen through NFS (unless we extend the protocol) 1417 * NB: It is tempting to set eof to true if the nfsvno_readdir() reads less 1418 * than requested, but this may not apply to all filesystems. For 1419 * example, client NFS does not { although it is never remote mounted 1420 * anyhow } 1421 * The alternate call nfsrvd_readdirplus() does lookups as well. 1422 * PS: The NFS protocol spec. does not clarify what the "count" byte 1423 * argument is a count of.. just name strings and file id's or the 1424 * entire reply rpc or ... 1425 * I tried just file name and id sizes and it confused the Sun client, 1426 * so I am using the full rpc size now. The "paranoia.." comment refers 1427 * to including the status longwords that are not a part of the dir. 1428 * "entry" structures, but are in the rpc. 1429 */ 1430int 1431nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1432 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1433{ 1434 struct dirent *dp; 1435 u_int32_t *tl; 1436 int dirlen; 1437 char *cpos, *cend, *rbuf; 1438 struct nfsvattr at; 1439 int nlen, error = 0, getret = 1; 1440 int siz, cnt, fullsiz, eofflag, ncookies; 1441 u_int64_t off, toff, verf; 1442 u_long *cookies = NULL, *cookiep; 1443 struct uio io; 1444 struct iovec iv; 1445 1446 if (nd->nd_repstat) { 1447 nfsrv_postopattr(nd, getret, &at); 1448 return (0); 1449 } 1450 if (nd->nd_flag & ND_NFSV2) { 1451 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1452 off = fxdr_unsigned(u_quad_t, *tl++); 1453 } else { 1454 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1455 off = fxdr_hyper(tl); 1456 tl += 2; 1457 verf = fxdr_hyper(tl); 1458 tl += 2; 1459 } 1460 toff = off; 1461 cnt = fxdr_unsigned(int, *tl); 1462 if (cnt > NFS_SRVMAXDATA(nd)) 1463 cnt = NFS_SRVMAXDATA(nd); 1464 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1465 fullsiz = siz; 1466 if (nd->nd_flag & ND_NFSV3) { 1467 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1468 p); 1469#if 0 1470 /* 1471 * va_filerev is not sufficient as a cookie verifier, 1472 * since it is not supposed to change when entries are 1473 * removed/added unless that offset cookies returned to 1474 * the client are no longer valid. 1475 */ 1476 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1477 nd->nd_repstat = NFSERR_BAD_COOKIE; 1478#endif 1479 } 1480 if (!nd->nd_repstat) 1481 nd->nd_repstat = nfsvno_accchk(vp, NFSV4ACE_SEARCH, 1482 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1483 NFSACCCHK_VPISLOCKED); 1484 if (nd->nd_repstat) { 1485 vput(vp); 1486 if (nd->nd_flag & ND_NFSV3) 1487 nfsrv_postopattr(nd, getret, &at); 1488 return (0); 1489 } 1490 NFSVOPUNLOCK(vp, 0, p); 1491 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1492again: 1493 eofflag = 0; 1494 if (cookies) { 1495 free((caddr_t)cookies, M_TEMP); 1496 cookies = NULL; 1497 } 1498 1499 iv.iov_base = rbuf; 1500 iv.iov_len = siz; 1501 io.uio_iov = &iv; 1502 io.uio_iovcnt = 1; 1503 io.uio_offset = (off_t)off; 1504 io.uio_resid = siz; 1505 io.uio_segflg = UIO_SYSSPACE; 1506 io.uio_rw = UIO_READ; 1507 io.uio_td = NULL; 1508 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p); 1509 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1510 &cookies); 1511 NFSVOPUNLOCK(vp, 0, p); 1512 off = (u_int64_t)io.uio_offset; 1513 if (io.uio_resid) 1514 siz -= io.uio_resid; 1515 1516 if (!cookies && !nd->nd_repstat) 1517 nd->nd_repstat = NFSERR_PERM; 1518 if (nd->nd_flag & ND_NFSV3) { 1519 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p); 1520 if (!nd->nd_repstat) 1521 nd->nd_repstat = getret; 1522 } 1523 1524 /* 1525 * Handles the failed cases. nd->nd_repstat == 0 past here. 1526 */ 1527 if (nd->nd_repstat) { 1528 vrele(vp); 1529 free((caddr_t)rbuf, M_TEMP); 1530 if (cookies) 1531 free((caddr_t)cookies, M_TEMP); 1532 if (nd->nd_flag & ND_NFSV3) 1533 nfsrv_postopattr(nd, getret, &at); 1534 return (0); 1535 } 1536 /* 1537 * If nothing read, return eof 1538 * rpc reply 1539 */ 1540 if (siz == 0) { 1541 vrele(vp); 1542 if (nd->nd_flag & ND_NFSV2) { 1543 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1544 } else { 1545 nfsrv_postopattr(nd, getret, &at); 1546 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1547 txdr_hyper(at.na_filerev, tl); 1548 tl += 2; 1549 } 1550 *tl++ = newnfs_false; 1551 *tl = newnfs_true; 1552 FREE((caddr_t)rbuf, M_TEMP); 1553 FREE((caddr_t)cookies, M_TEMP); 1554 return (0); 1555 } 1556 1557 /* 1558 * Check for degenerate cases of nothing useful read. 1559 * If so go try again 1560 */ 1561 cpos = rbuf; 1562 cend = rbuf + siz; 1563 dp = (struct dirent *)cpos; 1564 cookiep = cookies; 1565 1566 /* 1567 * For some reason FreeBSD's ufs_readdir() chooses to back the 1568 * directory offset up to a block boundary, so it is necessary to 1569 * skip over the records that precede the requested offset. This 1570 * requires the assumption that file offset cookies monotonically 1571 * increase. 1572 */ 1573 while (cpos < cend && ncookies > 0 && 1574 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1575 ((u_quad_t)(*cookiep)) <= toff)) { 1576 cpos += dp->d_reclen; 1577 dp = (struct dirent *)cpos; 1578 cookiep++; 1579 ncookies--; 1580 } 1581 if (cpos >= cend || ncookies == 0) { 1582 siz = fullsiz; 1583 toff = off; 1584 goto again; 1585 } 1586 1587 /* 1588 * dirlen is the size of the reply, including all XDR and must 1589 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1590 * if the XDR should be included in "count", but to be safe, we do. 1591 * (Include the two booleans at the end of the reply in dirlen now.) 1592 */ 1593 if (nd->nd_flag & ND_NFSV3) { 1594 nfsrv_postopattr(nd, getret, &at); 1595 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1596 txdr_hyper(at.na_filerev, tl); 1597 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1598 } else { 1599 dirlen = 2 * NFSX_UNSIGNED; 1600 } 1601 1602 /* Loop through the records and build reply */ 1603 while (cpos < cend && ncookies > 0) { 1604 nlen = dp->d_namlen; 1605 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1606 nlen <= NFS_MAXNAMLEN) { 1607 if (nd->nd_flag & ND_NFSV3) 1608 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1609 else 1610 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1611 if (dirlen > cnt) { 1612 eofflag = 0; 1613 break; 1614 } 1615 1616 /* 1617 * Build the directory record xdr from 1618 * the dirent entry. 1619 */ 1620 if (nd->nd_flag & ND_NFSV3) { 1621 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1622 *tl++ = newnfs_true; 1623 *tl++ = 0; 1624 } else { 1625 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1626 *tl++ = newnfs_true; 1627 } 1628 *tl = txdr_unsigned(dp->d_fileno); 1629 (void) nfsm_strtom(nd, dp->d_name, nlen); 1630 if (nd->nd_flag & ND_NFSV3) { 1631 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1632 *tl++ = 0; 1633 } else 1634 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1635 *tl = txdr_unsigned(*cookiep); 1636 } 1637 cpos += dp->d_reclen; 1638 dp = (struct dirent *)cpos; 1639 cookiep++; 1640 ncookies--; 1641 } 1642 if (cpos < cend) 1643 eofflag = 0; 1644 vrele(vp); 1645 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1646 *tl++ = newnfs_false; 1647 if (eofflag) 1648 *tl = newnfs_true; 1649 else 1650 *tl = newnfs_false; 1651 FREE((caddr_t)rbuf, M_TEMP); 1652 FREE((caddr_t)cookies, M_TEMP); 1653 return (0); 1654nfsmout: 1655 vput(vp); 1656 return (error); 1657} 1658 1659/* 1660 * Readdirplus for V3 and Readdir for V4. 1661 */ 1662int 1663nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1664 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1665{ 1666 struct dirent *dp; 1667 u_int32_t *tl; 1668 int dirlen; 1669 char *cpos, *cend, *rbuf; 1670 struct vnode *nvp; 1671 fhandle_t nfh; 1672 struct nfsvattr nva, at, *nvap = &nva; 1673 struct mbuf *mb0, *mb1; 1674 struct nfsreferral *refp; 1675 int nlen, r, error = 0, getret = 1, vgetret; 1676 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1677 caddr_t bpos0, bpos1; 1678 u_int64_t off, toff, verf; 1679 u_long *cookies = NULL, *cookiep; 1680 nfsattrbit_t attrbits, rderrbits, savbits; 1681 struct uio io; 1682 struct iovec iv; 1683 1684 if (nd->nd_repstat) { 1685 nfsrv_postopattr(nd, getret, &at); 1686 return (0); 1687 } 1688 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1689 off = fxdr_hyper(tl); 1690 toff = off; 1691 tl += 2; 1692 verf = fxdr_hyper(tl); 1693 tl += 2; 1694 siz = fxdr_unsigned(int, *tl++); 1695 cnt = fxdr_unsigned(int, *tl); 1696 1697 /* 1698 * Use the server's maximum data transfer size as the upper bound 1699 * on reply datalen. 1700 */ 1701 if (cnt > NFS_SRVMAXDATA(nd)) 1702 cnt = NFS_SRVMAXDATA(nd); 1703 1704 /* 1705 * siz is a "hint" of how much directory information (name, fileid, 1706 * cookie) should be in the reply. At least one client "hints" 0, 1707 * so I set it to cnt for that case. I also round it up to the 1708 * next multiple of DIRBLKSIZ. 1709 */ 1710 if (siz == 0) 1711 siz = cnt; 1712 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1713 1714 if (nd->nd_flag & ND_NFSV4) { 1715 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1716 if (error) 1717 goto nfsmout; 1718 NFSSET_ATTRBIT(&savbits, &attrbits); 1719 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1720 NFSZERO_ATTRBIT(&rderrbits); 1721 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1722 } else { 1723 NFSZERO_ATTRBIT(&attrbits); 1724 } 1725 fullsiz = siz; 1726 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p); 1727 if (!nd->nd_repstat) { 1728 if (off && verf != at.na_filerev) { 1729 /* 1730 * va_filerev is not sufficient as a cookie verifier, 1731 * since it is not supposed to change when entries are 1732 * removed/added unless that offset cookies returned to 1733 * the client are no longer valid. 1734 */ 1735#if 0 1736 if (nd->nd_flag & ND_NFSV4) { 1737 nd->nd_repstat = NFSERR_NOTSAME; 1738 } else { 1739 nd->nd_repstat = NFSERR_BAD_COOKIE; 1740 } 1741#endif 1742 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1743 nd->nd_repstat = NFSERR_BAD_COOKIE; 1744 } 1745 } 1746 if (!nd->nd_repstat && vp->v_type != VDIR) 1747 nd->nd_repstat = NFSERR_NOTDIR; 1748 if (!nd->nd_repstat && cnt == 0) 1749 nd->nd_repstat = NFSERR_TOOSMALL; 1750 if (!nd->nd_repstat) 1751 nd->nd_repstat = nfsvno_accchk(vp, NFSV4ACE_SEARCH, 1752 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1753 NFSACCCHK_VPISLOCKED); 1754 if (nd->nd_repstat) { 1755 vput(vp); 1756 if (nd->nd_flag & ND_NFSV3) 1757 nfsrv_postopattr(nd, getret, &at); 1758 return (0); 1759 } 1760 1761 NFSVOPUNLOCK(vp, 0, p); 1762 1763 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1764again: 1765 eofflag = 0; 1766 if (cookies) { 1767 free((caddr_t)cookies, M_TEMP); 1768 cookies = NULL; 1769 } 1770 1771 iv.iov_base = rbuf; 1772 iv.iov_len = siz; 1773 io.uio_iov = &iv; 1774 io.uio_iovcnt = 1; 1775 io.uio_offset = (off_t)off; 1776 io.uio_resid = siz; 1777 io.uio_segflg = UIO_SYSSPACE; 1778 io.uio_rw = UIO_READ; 1779 io.uio_td = NULL; 1780 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p); 1781 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1782 &cookies); 1783 NFSVOPUNLOCK(vp, 0, p); 1784 off = (u_int64_t)io.uio_offset; 1785 if (io.uio_resid) 1786 siz -= io.uio_resid; 1787 1788 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p); 1789 1790 if (!cookies && !nd->nd_repstat) 1791 nd->nd_repstat = NFSERR_PERM; 1792 if (!nd->nd_repstat) 1793 nd->nd_repstat = getret; 1794 if (nd->nd_repstat) { 1795 vrele(vp); 1796 if (cookies) 1797 free((caddr_t)cookies, M_TEMP); 1798 free((caddr_t)rbuf, M_TEMP); 1799 if (nd->nd_flag & ND_NFSV3) 1800 nfsrv_postopattr(nd, getret, &at); 1801 return (0); 1802 } 1803 /* 1804 * If nothing read, return eof 1805 * rpc reply 1806 */ 1807 if (siz == 0) { 1808 vrele(vp); 1809 if (nd->nd_flag & ND_NFSV3) 1810 nfsrv_postopattr(nd, getret, &at); 1811 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1812 txdr_hyper(at.na_filerev, tl); 1813 tl += 2; 1814 *tl++ = newnfs_false; 1815 *tl = newnfs_true; 1816 free((caddr_t)cookies, M_TEMP); 1817 free((caddr_t)rbuf, M_TEMP); 1818 return (0); 1819 } 1820 1821 /* 1822 * Check for degenerate cases of nothing useful read. 1823 * If so go try again 1824 */ 1825 cpos = rbuf; 1826 cend = rbuf + siz; 1827 dp = (struct dirent *)cpos; 1828 cookiep = cookies; 1829 1830 /* 1831 * For some reason FreeBSD's ufs_readdir() chooses to back the 1832 * directory offset up to a block boundary, so it is necessary to 1833 * skip over the records that precede the requested offset. This 1834 * requires the assumption that file offset cookies monotonically 1835 * increase. 1836 */ 1837 while (cpos < cend && ncookies > 0 && 1838 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1839 ((u_quad_t)(*cookiep)) <= toff || 1840 ((nd->nd_flag & ND_NFSV4) && 1841 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1842 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1843 cpos += dp->d_reclen; 1844 dp = (struct dirent *)cpos; 1845 cookiep++; 1846 ncookies--; 1847 } 1848 if (cpos >= cend || ncookies == 0) { 1849 siz = fullsiz; 1850 toff = off; 1851 goto again; 1852 } 1853 1854 /* 1855 * Probe one of the directory entries to see if the filesystem 1856 * supports VGET for NFSv3. For NFSv4, it will return an 1857 * error later, if attributes are required. 1858 * (To be honest, most if not all NFSv4 clients will require 1859 * attributes, but??) 1860 */ 1861 if ((nd->nd_flag & ND_NFSV3)) { 1862 vgetret = VFS_VGET(vp->v_mount, dp->d_fileno, LK_EXCLUSIVE, 1863 &nvp); 1864 if (vgetret != 0) { 1865 if (vgetret == EOPNOTSUPP) 1866 nd->nd_repstat = NFSERR_NOTSUPP; 1867 else 1868 nd->nd_repstat = NFSERR_SERVERFAULT; 1869 vrele(vp); 1870 if (cookies) 1871 free((caddr_t)cookies, M_TEMP); 1872 free((caddr_t)rbuf, M_TEMP); 1873 nfsrv_postopattr(nd, getret, &at); 1874 return (0); 1875 } 1876 if (!vgetret) 1877 vput(nvp); 1878 nvp = NULL; 1879 } 1880 1881 /* 1882 * Save this position, in case there is an error before one entry 1883 * is created. 1884 */ 1885 mb0 = nd->nd_mb; 1886 bpos0 = nd->nd_bpos; 1887 1888 /* 1889 * Fill in the first part of the reply. 1890 * dirlen is the reply length in bytes and cannot exceed cnt. 1891 * (Include the two booleans at the end of the reply in dirlen now, 1892 * so we recognize when we have exceeded cnt.) 1893 */ 1894 if (nd->nd_flag & ND_NFSV3) { 1895 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1896 nfsrv_postopattr(nd, getret, &at); 1897 } else { 1898 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 1899 } 1900 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 1901 txdr_hyper(at.na_filerev, tl); 1902 1903 /* 1904 * Save this position, in case there is an empty reply needed. 1905 */ 1906 mb1 = nd->nd_mb; 1907 bpos1 = nd->nd_bpos; 1908 1909 /* Loop through the records and build reply */ 1910 entrycnt = 0; 1911 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 1912 nlen = dp->d_namlen; 1913 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1914 nlen <= NFS_MAXNAMLEN && 1915 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 1916 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 1917 || (nlen == 1 && dp->d_name[0] != '.'))) { 1918 /* 1919 * Save the current position in the reply, in case 1920 * this entry exceeds cnt. 1921 */ 1922 mb1 = nd->nd_mb; 1923 bpos1 = nd->nd_bpos; 1924 1925 /* 1926 * For readdir_and_lookup get the vnode using 1927 * the file number. 1928 */ 1929 nvp = NULL; 1930 refp = NULL; 1931 r = 0; 1932 if ((nd->nd_flag & ND_NFSV3) || 1933 NFSNONZERO_ATTRBIT(&savbits)) { 1934 if (nd->nd_flag & ND_NFSV4) 1935 refp = nfsv4root_getreferral(NULL, 1936 vp, dp->d_fileno); 1937 if (refp == NULL) 1938 r = VFS_VGET(vp->v_mount, dp->d_fileno, 1939 LK_EXCLUSIVE, &nvp); 1940 if (!r) { 1941 if (refp == NULL && 1942 ((nd->nd_flag & ND_NFSV3) || 1943 NFSNONZERO_ATTRBIT(&attrbits))) { 1944 r = nfsvno_getfh(nvp, &nfh, p); 1945 if (!r) 1946 r = nfsvno_getattr(nvp, nvap, 1947 nd->nd_cred, p); 1948 } 1949 } else { 1950 nvp = NULL; 1951 } 1952 if (r) { 1953 if (!NFSISSET_ATTRBIT(&attrbits, 1954 NFSATTRBIT_RDATTRERROR)) { 1955 if (nvp != NULL) 1956 vput(nvp); 1957 nd->nd_repstat = r; 1958 break; 1959 } 1960 } 1961 } 1962 1963 /* 1964 * Build the directory record xdr 1965 */ 1966 if (nd->nd_flag & ND_NFSV3) { 1967 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1968 *tl++ = newnfs_true; 1969 *tl++ = 0; 1970 *tl = txdr_unsigned(dp->d_fileno); 1971 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 1972 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1973 *tl++ = 0; 1974 *tl = txdr_unsigned(*cookiep); 1975 nfsrv_postopattr(nd, 0, nvap); 1976 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 1977 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 1978 if (nvp != NULL) 1979 vput(nvp); 1980 } else { 1981 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1982 *tl++ = newnfs_true; 1983 *tl++ = 0; 1984 *tl = txdr_unsigned(*cookiep); 1985 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 1986 if (nvp != NULL) 1987 NFSVOPUNLOCK(nvp, 0, p); 1988 if (refp != NULL) { 1989 dirlen += nfsrv_putreferralattr(nd, 1990 &savbits, refp, 0, 1991 &nd->nd_repstat); 1992 if (nd->nd_repstat) { 1993 if (nvp != NULL) 1994 vrele(nvp); 1995 break; 1996 } 1997 } else if (r) { 1998 dirlen += nfsvno_fillattr(nd, nvp, nvap, 1999 &nfh, r, &rderrbits, nd->nd_cred, 2000 p, isdgram, 0); 2001 } else { 2002 dirlen += nfsvno_fillattr(nd, nvp, nvap, 2003 &nfh, r, &attrbits, nd->nd_cred, 2004 p, isdgram, 0); 2005 } 2006 if (nvp != NULL) 2007 vrele(nvp); 2008 dirlen += (3 * NFSX_UNSIGNED); 2009 } 2010 if (dirlen <= cnt) 2011 entrycnt++; 2012 } 2013 cpos += dp->d_reclen; 2014 dp = (struct dirent *)cpos; 2015 cookiep++; 2016 ncookies--; 2017 } 2018 vrele(vp); 2019 2020 /* 2021 * If dirlen > cnt, we must strip off the last entry. If that 2022 * results in an empty reply, report NFSERR_TOOSMALL. 2023 */ 2024 if (dirlen > cnt || nd->nd_repstat) { 2025 if (!nd->nd_repstat && entrycnt == 0) 2026 nd->nd_repstat = NFSERR_TOOSMALL; 2027 if (nd->nd_repstat) 2028 newnfs_trimtrailing(nd, mb0, bpos0); 2029 else 2030 newnfs_trimtrailing(nd, mb1, bpos1); 2031 eofflag = 0; 2032 } else if (cpos < cend) 2033 eofflag = 0; 2034 if (!nd->nd_repstat) { 2035 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2036 *tl++ = newnfs_false; 2037 if (eofflag) 2038 *tl = newnfs_true; 2039 else 2040 *tl = newnfs_false; 2041 } 2042 FREE((caddr_t)cookies, M_TEMP); 2043 FREE((caddr_t)rbuf, M_TEMP); 2044 return (0); 2045nfsmout: 2046 vput(vp); 2047 return (error); 2048} 2049 2050/* 2051 * Get the settable attributes out of the mbuf list. 2052 * (Return 0 or EBADRPC) 2053 */ 2054int 2055nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2056 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2057{ 2058 u_int32_t *tl; 2059 struct nfsv2_sattr *sp; 2060 struct timeval curtime; 2061 int error = 0, toclient = 0; 2062 2063 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2064 case ND_NFSV2: 2065 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2066 /* 2067 * Some old clients didn't fill in the high order 16bits. 2068 * --> check the low order 2 bytes for 0xffff 2069 */ 2070 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2071 nvap->na_mode = nfstov_mode(sp->sa_mode); 2072 if (sp->sa_uid != newnfs_xdrneg1) 2073 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2074 if (sp->sa_gid != newnfs_xdrneg1) 2075 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2076 if (sp->sa_size != newnfs_xdrneg1) 2077 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2078 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2079#ifdef notyet 2080 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2081#else 2082 nvap->na_atime.tv_sec = 2083 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2084 nvap->na_atime.tv_nsec = 0; 2085#endif 2086 } 2087 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2088 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2089 break; 2090 case ND_NFSV3: 2091 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2092 if (*tl == newnfs_true) { 2093 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2094 nvap->na_mode = nfstov_mode(*tl); 2095 } 2096 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2097 if (*tl == newnfs_true) { 2098 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2099 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2100 } 2101 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2102 if (*tl == newnfs_true) { 2103 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2104 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2105 } 2106 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2107 if (*tl == newnfs_true) { 2108 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2109 nvap->na_size = fxdr_hyper(tl); 2110 } 2111 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2112 switch (fxdr_unsigned(int, *tl)) { 2113 case NFSV3SATTRTIME_TOCLIENT: 2114 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2115 fxdr_nfsv3time(tl, &nvap->na_atime); 2116 toclient = 1; 2117 break; 2118 case NFSV3SATTRTIME_TOSERVER: 2119 NFSGETTIME(&curtime); 2120 nvap->na_atime.tv_sec = curtime.tv_sec; 2121 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000; 2122 nvap->na_vaflags |= VA_UTIMES_NULL; 2123 break; 2124 }; 2125 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2126 switch (fxdr_unsigned(int, *tl)) { 2127 case NFSV3SATTRTIME_TOCLIENT: 2128 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2129 fxdr_nfsv3time(tl, &nvap->na_mtime); 2130 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2131 break; 2132 case NFSV3SATTRTIME_TOSERVER: 2133 NFSGETTIME(&curtime); 2134 nvap->na_mtime.tv_sec = curtime.tv_sec; 2135 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000; 2136 if (!toclient) 2137 nvap->na_vaflags |= VA_UTIMES_NULL; 2138 break; 2139 }; 2140 break; 2141 case ND_NFSV4: 2142 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2143 }; 2144nfsmout: 2145 return (error); 2146} 2147 2148/* 2149 * Handle the setable attributes for V4. 2150 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2151 */ 2152int 2153nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2154 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2155{ 2156 u_int32_t *tl; 2157 int attrsum = 0; 2158 int i, j; 2159 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2160 int toclient = 0; 2161 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2162 uid_t uid; 2163 gid_t gid; 2164 struct timeval curtime; 2165 2166 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2167 if (error) 2168 return (error); 2169 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2170 attrsize = fxdr_unsigned(int, *tl); 2171 2172 /* 2173 * Loop around getting the setable attributes. If an unsupported 2174 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2175 */ 2176 if (retnotsup) { 2177 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2178 bitpos = NFSATTRBIT_MAX; 2179 } else { 2180 bitpos = 0; 2181 } 2182 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2183 if (attrsum > attrsize) { 2184 error = NFSERR_BADXDR; 2185 goto nfsmout; 2186 } 2187 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2188 switch (bitpos) { 2189 case NFSATTRBIT_SIZE: 2190 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2191 nvap->na_size = fxdr_hyper(tl); 2192 attrsum += NFSX_HYPER; 2193 break; 2194 case NFSATTRBIT_ACL: 2195 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2196 p); 2197 if (error) 2198 goto nfsmout; 2199 if (aceerr && !nd->nd_repstat) 2200 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2201 attrsum += aclsize; 2202 break; 2203 case NFSATTRBIT_ARCHIVE: 2204 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2205 if (!nd->nd_repstat) 2206 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2207 attrsum += NFSX_UNSIGNED; 2208 break; 2209 case NFSATTRBIT_HIDDEN: 2210 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2211 if (!nd->nd_repstat) 2212 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2213 attrsum += NFSX_UNSIGNED; 2214 break; 2215 case NFSATTRBIT_MIMETYPE: 2216 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2217 i = fxdr_unsigned(int, *tl); 2218 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2219 if (error) 2220 goto nfsmout; 2221 if (!nd->nd_repstat) 2222 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2223 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2224 break; 2225 case NFSATTRBIT_MODE: 2226 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2227 nvap->na_mode = nfstov_mode(*tl); 2228 attrsum += NFSX_UNSIGNED; 2229 break; 2230 case NFSATTRBIT_OWNER: 2231 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2232 j = fxdr_unsigned(int, *tl); 2233 if (j < 0) 2234 return (NFSERR_BADXDR); 2235 if (j > NFSV4_SMALLSTR) 2236 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2237 else 2238 cp = namestr; 2239 error = nfsrv_mtostr(nd, cp, j); 2240 if (error) { 2241 if (j > NFSV4_SMALLSTR) 2242 free(cp, M_NFSSTRING); 2243 return (error); 2244 } 2245 if (!nd->nd_repstat) { 2246 nd->nd_repstat = nfsv4_strtouid(cp,j,&uid,p); 2247 if (!nd->nd_repstat) 2248 nvap->na_uid = uid; 2249 } 2250 if (j > NFSV4_SMALLSTR) 2251 free(cp, M_NFSSTRING); 2252 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2253 break; 2254 case NFSATTRBIT_OWNERGROUP: 2255 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2256 j = fxdr_unsigned(int, *tl); 2257 if (j < 0) 2258 return (NFSERR_BADXDR); 2259 if (j > NFSV4_SMALLSTR) 2260 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2261 else 2262 cp = namestr; 2263 error = nfsrv_mtostr(nd, cp, j); 2264 if (error) { 2265 if (j > NFSV4_SMALLSTR) 2266 free(cp, M_NFSSTRING); 2267 return (error); 2268 } 2269 if (!nd->nd_repstat) { 2270 nd->nd_repstat = nfsv4_strtogid(cp,j,&gid,p); 2271 if (!nd->nd_repstat) 2272 nvap->na_gid = gid; 2273 } 2274 if (j > NFSV4_SMALLSTR) 2275 free(cp, M_NFSSTRING); 2276 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2277 break; 2278 case NFSATTRBIT_SYSTEM: 2279 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2280 if (!nd->nd_repstat) 2281 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2282 attrsum += NFSX_UNSIGNED; 2283 break; 2284 case NFSATTRBIT_TIMEACCESSSET: 2285 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2286 attrsum += NFSX_UNSIGNED; 2287 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2288 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2289 fxdr_nfsv4time(tl, &nvap->na_atime); 2290 toclient = 1; 2291 attrsum += NFSX_V4TIME; 2292 } else { 2293 NFSGETTIME(&curtime); 2294 nvap->na_atime.tv_sec = curtime.tv_sec; 2295 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000; 2296 nvap->na_vaflags |= VA_UTIMES_NULL; 2297 } 2298 break; 2299 case NFSATTRBIT_TIMEBACKUP: 2300 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2301 if (!nd->nd_repstat) 2302 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2303 attrsum += NFSX_V4TIME; 2304 break; 2305 case NFSATTRBIT_TIMECREATE: 2306 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2307 if (!nd->nd_repstat) 2308 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2309 attrsum += NFSX_V4TIME; 2310 break; 2311 case NFSATTRBIT_TIMEMODIFYSET: 2312 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2313 attrsum += NFSX_UNSIGNED; 2314 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2315 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2316 fxdr_nfsv4time(tl, &nvap->na_mtime); 2317 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2318 attrsum += NFSX_V4TIME; 2319 } else { 2320 NFSGETTIME(&curtime); 2321 nvap->na_mtime.tv_sec = curtime.tv_sec; 2322 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000; 2323 if (!toclient) 2324 nvap->na_vaflags |= VA_UTIMES_NULL; 2325 } 2326 break; 2327 default: 2328 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2329 /* 2330 * set bitpos so we drop out of the loop. 2331 */ 2332 bitpos = NFSATTRBIT_MAX; 2333 break; 2334 }; 2335 } 2336 2337 /* 2338 * some clients pad the attrlist, so we need to skip over the 2339 * padding. 2340 */ 2341 if (attrsum > attrsize) { 2342 error = NFSERR_BADXDR; 2343 } else { 2344 attrsize = NFSM_RNDUP(attrsize); 2345 if (attrsum < attrsize) 2346 error = nfsm_advance(nd, attrsize - attrsum, -1); 2347 } 2348nfsmout: 2349 return (error); 2350} 2351 2352/* 2353 * Check/setup export credentials. 2354 */ 2355int 2356nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2357 struct ucred *credanon) 2358{ 2359 int i; 2360 int error = 0; 2361 2362 /* 2363 * Check/setup credentials. 2364 */ 2365 if (nd->nd_flag & ND_GSS) 2366 exp->nes_exflag &= ~MNT_EXPORTANON; 2367 2368 /* 2369 * Check to see if the operation is allowed for this security flavor. 2370 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2371 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2372 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2373 */ 2374 if (nfsvno_testexp(nd, exp) && 2375 nd->nd_procnum != NFSV4OP_SECINFO && 2376 nd->nd_procnum != NFSPROC_FSINFO) { 2377 if (nd->nd_flag & ND_NFSV4) 2378 error = NFSERR_WRONGSEC; 2379 else 2380 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2381 return (error); 2382 } 2383 2384 /* 2385 * Check to see if the file system is exported V4 only. 2386 */ 2387 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) 2388 return (NFSERR_PROGNOTV4); 2389 2390 /* 2391 * Now, map the user credentials. 2392 * (Note that ND_AUTHNONE will only be set for an NFSv3 2393 * Fsinfo RPC. If set for anything else, this code might need 2394 * to change.) 2395 */ 2396 if (NFSVNO_EXPORTED(exp) && 2397 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) || 2398 NFSVNO_EXPORTANON(exp) || 2399 (nd->nd_flag & ND_AUTHNONE))) { 2400 nd->nd_cred->cr_uid = credanon->cr_uid; 2401 nd->nd_cred->cr_gid = credanon->cr_gid; 2402 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2403 nd->nd_cred->cr_groups[i] = credanon->cr_groups[i]; 2404 nd->nd_cred->cr_ngroups = i; 2405 } 2406 return (0); 2407} 2408 2409/* 2410 * Check exports. 2411 */ 2412int 2413nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2414 struct ucred **credp) 2415{ 2416 int i, error, *secflavors; 2417 2418 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2419 &exp->nes_numsecflavor, &secflavors); 2420 if (error) { 2421 if (nfs_rootfhset) { 2422 exp->nes_exflag = 0; 2423 exp->nes_numsecflavor = 0; 2424 error = 0; 2425 } 2426 } else { 2427 /* Copy the security flavors. */ 2428 for (i = 0; i < exp->nes_numsecflavor; i++) 2429 exp->nes_secflavors[i] = secflavors[i]; 2430 } 2431 return (error); 2432} 2433 2434/* 2435 * Get a vnode for a file handle and export stuff. 2436 */ 2437int 2438nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2439 struct vnode **vpp, struct nfsexstuff *exp, struct ucred **credp) 2440{ 2441 int i, error, *secflavors; 2442 2443 *credp = NULL; 2444 exp->nes_numsecflavor = 0; 2445 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 2446 if (nam && !error) { 2447 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2448 &exp->nes_numsecflavor, &secflavors); 2449 if (error) { 2450 if (nfs_rootfhset) { 2451 exp->nes_exflag = 0; 2452 exp->nes_numsecflavor = 0; 2453 error = 0; 2454 } else { 2455 vput(*vpp); 2456 } 2457 } else { 2458 /* Copy the security flavors. */ 2459 for (i = 0; i < exp->nes_numsecflavor; i++) 2460 exp->nes_secflavors[i] = secflavors[i]; 2461 } 2462 } 2463 return (error); 2464} 2465 2466/* 2467 * Do the pathconf vnode op. 2468 */ 2469int 2470nfsvno_pathconf(struct vnode *vp, int flag, register_t *retf, 2471 struct ucred *cred, struct thread *p) 2472{ 2473 int error; 2474 2475 error = VOP_PATHCONF(vp, flag, retf); 2476 return (error); 2477} 2478 2479/* 2480 * nfsd_fhtovp() - convert a fh to a vnode ptr 2481 * - look up fsid in mount list (if not found ret error) 2482 * - get vp and export rights by calling nfsvno_fhtovp() 2483 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2484 * for AUTH_SYS 2485 * Also handle getting the Giant lock for the file system, 2486 * as required: 2487 * - if same mount point as *mpp 2488 * do nothing 2489 * else if *mpp == NULL 2490 * if already locked 2491 * leave it locked 2492 * else 2493 * call VFS_LOCK_GIANT() 2494 * else 2495 * if already locked 2496 * unlock Giant 2497 * call VFS_LOCK_GIANT() 2498 */ 2499void 2500nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, 2501 struct vnode **vpp, struct nfsexstuff *exp, 2502 struct mount **mpp, int startwrite, struct thread *p) 2503{ 2504 struct mount *mp; 2505 struct ucred *credanon; 2506 fhandle_t *fhp; 2507 2508 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2509 /* 2510 * Check for the special case of the nfsv4root_fh. 2511 */ 2512 mp = vfs_getvfs(&fhp->fh_fsid); 2513 if (!mp) { 2514 *vpp = NULL; 2515 nd->nd_repstat = ESTALE; 2516 if (*mpp && exp->nes_vfslocked) 2517 VFS_UNLOCK_GIANT(*mpp); 2518 *mpp = NULL; 2519 exp->nes_vfslocked = 0; 2520 return; 2521 } 2522 2523 /* 2524 * Now, handle Giant for the file system. 2525 */ 2526 if (*mpp != NULL && *mpp != mp && exp->nes_vfslocked) { 2527 VFS_UNLOCK_GIANT(*mpp); 2528 exp->nes_vfslocked = 0; 2529 } 2530 if (!exp->nes_vfslocked && *mpp != mp) 2531 exp->nes_vfslocked = VFS_LOCK_GIANT(mp); 2532 2533 *mpp = mp; 2534 if (startwrite) 2535 vn_start_write(NULL, mpp, V_WAIT); 2536 2537 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, vpp, exp, 2538 &credanon); 2539 2540 /* 2541 * For NFSv4 without a pseudo root fs, unexported file handles 2542 * can be returned, so that Lookup works everywhere. 2543 */ 2544 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2545 !(nd->nd_flag & ND_NFSV4)) { 2546 vput(*vpp); 2547 nd->nd_repstat = EACCES; 2548 } 2549 2550 /* 2551 * Personally, I've never seen any point in requiring a 2552 * reserved port#, since only in the rare case where the 2553 * clients are all boxes with secure system priviledges, 2554 * does it provide any enhanced security, but... some people 2555 * believe it to be useful and keep putting this code back in. 2556 * (There is also some "security checker" out there that 2557 * complains if the nfs server doesn't enforce this.) 2558 * However, note the following: 2559 * RFC3530 (NFSv4) specifies that a reserved port# not be 2560 * required. 2561 * RFC2623 recommends that, if a reserved port# is checked for, 2562 * that there be a way to turn that off--> ifdef'd. 2563 */ 2564#ifdef NFS_REQRSVPORT 2565 if (!nd->nd_repstat) { 2566 struct sockaddr_in *saddr; 2567 struct sockaddr_in6 *saddr6; 2568 2569 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2570 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2571 if (!(nd->nd_flag & ND_NFSV4) && 2572 ((saddr->sin_family == AF_INET && 2573 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2574 (saddr6->sin6_family == AF_INET6 && 2575 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2576 vput(*vpp); 2577 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2578 } 2579 } 2580#endif /* NFS_REQRSVPORT */ 2581 2582 /* 2583 * Check/setup credentials. 2584 */ 2585 if (!nd->nd_repstat) { 2586 nd->nd_saveduid = nd->nd_cred->cr_uid; 2587 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2588 if (nd->nd_repstat) 2589 vput(*vpp); 2590 } 2591 if (credanon != NULL) 2592 crfree(credanon); 2593 if (nd->nd_repstat) { 2594 if (startwrite) 2595 vn_finished_write(mp); 2596 if (exp->nes_vfslocked) { 2597 VFS_UNLOCK_GIANT(mp); 2598 exp->nes_vfslocked = 0; 2599 } 2600 vfs_rel(mp); 2601 *vpp = NULL; 2602 *mpp = NULL; 2603 } else { 2604 vfs_rel(mp); 2605 } 2606} 2607 2608/* 2609 * glue for fp. 2610 */ 2611int 2612fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2613{ 2614 struct filedesc *fdp; 2615 struct file *fp; 2616 2617 fdp = p->td_proc->p_fd; 2618 if (fd >= fdp->fd_nfiles || 2619 (fp = fdp->fd_ofiles[fd]) == NULL) 2620 return (EBADF); 2621 *fpp = fp; 2622 return (0); 2623} 2624 2625/* 2626 * Called from nfssvc() to update the exports list. Just call 2627 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2628 * in the mount list. 2629 */ 2630int 2631nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2632{ 2633 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2634 int error; 2635 struct nameidata nd; 2636 fhandle_t fh; 2637 2638 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2639 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT)) { 2640 nfs_rootfhset = 0; 2641 nfsv4root_set = 0; 2642 } else if (error == 0) { 2643 if (nfsexargp->fspec == NULL) 2644 return (EPERM); 2645 /* 2646 * If fspec != NULL, this is the v4root path. 2647 */ 2648 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_USERSPACE, 2649 nfsexargp->fspec, p); 2650 if ((error = namei(&nd)) != 0) 2651 return (error); 2652 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2653 vrele(nd.ni_vp); 2654 if (!error) { 2655 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2656 NFSBCOPY((caddr_t)&fh, 2657 nfs_rootfh.nfsrvfh_data, 2658 sizeof (fhandle_t)); 2659 nfs_rootfhset = 1; 2660 } 2661 } 2662 return (error); 2663} 2664 2665/* 2666 * Get the tcp socket sequence numbers we need. 2667 * (Maybe this should be moved to the tcp sources?) 2668 */ 2669int 2670nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap) 2671{ 2672 struct inpcb *inp; 2673 struct tcpcb *tp; 2674 int error = EPIPE; 2675 2676 INP_INFO_RLOCK(&V_tcbinfo); 2677 inp = sotoinpcb(so); 2678 if (inp == NULL) { 2679 INP_INFO_RUNLOCK(&V_tcbinfo); 2680 return (error); 2681 } 2682 INP_RLOCK(inp); 2683 INP_INFO_RUNLOCK(&V_tcbinfo); 2684 tp = intotcpcb(inp); 2685 if (tp != NULL && tp->t_state == TCPS_ESTABLISHED) { 2686 *maxp = tp->snd_max; 2687 *unap = tp->snd_una; 2688 error = 0; 2689 } 2690 INP_RUNLOCK(inp); 2691 return (error); 2692} 2693 2694/* 2695 * This function needs to test to see if the system is near its limit 2696 * for memory allocation via malloc() or mget() and return True iff 2697 * either of these resources are near their limit. 2698 * XXX (For now, this is just a stub.) 2699 */ 2700int nfsrv_testmalloclimit = 0; 2701int 2702nfsrv_mallocmget_limit(void) 2703{ 2704 static int printmesg = 0; 2705 static int testval = 1; 2706 2707 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2708 if ((printmesg++ % 100) == 0) 2709 printf("nfsd: malloc/mget near limit\n"); 2710 return (1); 2711 } 2712 return (0); 2713} 2714 2715/* 2716 * BSD specific initialization of a mount point. 2717 */ 2718void 2719nfsd_mntinit(void) 2720{ 2721 static int inited = 0; 2722 2723 if (inited) 2724 return; 2725 inited = 1; 2726 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2727 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2728 nfsv4root_mnt.mnt_export = NULL; 2729 TAILQ_INIT(&nfsv4root_opt); 2730 TAILQ_INIT(&nfsv4root_newopt); 2731 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2732 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2733 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2734} 2735 2736/* 2737 * Get a vnode for a file handle, without checking exports, etc. 2738 */ 2739struct vnode * 2740nfsvno_getvp(fhandle_t *fhp) 2741{ 2742 struct mount *mp; 2743 struct vnode *vp; 2744 int error; 2745 2746 mp = vfs_getvfs(&fhp->fh_fsid); 2747 if (mp == NULL) 2748 return (NULL); 2749 error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp); 2750 if (error) 2751 return (NULL); 2752 return (vp); 2753} 2754 2755/* 2756 * Check to see it a byte range lock held by a process running 2757 * locally on the server conflicts with the new lock. 2758 */ 2759int 2760nfsvno_localconflict(struct vnode *vp, int ftype, u_int64_t first, 2761 u_int64_t end, struct nfslockconflict *cfp, struct thread *td) 2762{ 2763 int error; 2764 struct flock fl; 2765 2766 if (!nfsrv_dolocallocks) 2767 return (0); 2768 fl.l_whence = SEEK_SET; 2769 fl.l_type = ftype; 2770 fl.l_start = (off_t)first; 2771 if (end == NFS64BITSSET) 2772 fl.l_len = 0; 2773 else 2774 fl.l_len = (off_t)(end - first); 2775 /* 2776 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2777 * values for all calls, so that all locks will be held by the 2778 * nfsd server. (The nfsd server handles conflicts between the 2779 * various clients.) 2780 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2781 * bytes, so it can't be put in l_sysid. 2782 */ 2783 if (nfsv4_sysid == 0) 2784 nfsv4_sysid = nlm_acquire_next_sysid(); 2785 fl.l_pid = (pid_t)0; 2786 fl.l_sysid = (int)nfsv4_sysid; 2787 2788 NFSVOPUNLOCK(vp, 0, td); 2789 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_GETLK, &fl, 2790 (F_POSIX | F_REMOTE)); 2791 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, td); 2792 if (error) 2793 return (error); 2794 if (fl.l_type == F_UNLCK) 2795 return (0); 2796 if (cfp != NULL) { 2797 cfp->cl_clientid.lval[0] = cfp->cl_clientid.lval[1] = 0; 2798 cfp->cl_first = (u_int64_t)fl.l_start; 2799 if (fl.l_len == 0) 2800 cfp->cl_end = NFS64BITSSET; 2801 else 2802 cfp->cl_end = (u_int64_t) 2803 (fl.l_start + fl.l_len); 2804 if (fl.l_type == F_WRLCK) 2805 cfp->cl_flags = NFSLCK_WRITE; 2806 else 2807 cfp->cl_flags = NFSLCK_READ; 2808 sprintf(cfp->cl_owner, "LOCALID%d", fl.l_pid); 2809 cfp->cl_ownerlen = strlen(cfp->cl_owner); 2810 return (NFSERR_DENIED); 2811 } 2812 return (NFSERR_INVAL); 2813} 2814 2815/* 2816 * Do a local VOP_ADVLOCK(). 2817 */ 2818int 2819nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2820 u_int64_t end, struct thread *td) 2821{ 2822 int error; 2823 struct flock fl; 2824 u_int64_t tlen; 2825 2826 if (!nfsrv_dolocallocks) 2827 return (0); 2828 fl.l_whence = SEEK_SET; 2829 fl.l_type = ftype; 2830 fl.l_start = (off_t)first; 2831 if (end == NFS64BITSSET) { 2832 fl.l_len = 0; 2833 } else { 2834 tlen = end - first; 2835 fl.l_len = (off_t)tlen; 2836 } 2837 /* 2838 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2839 * values for all calls, so that all locks will be held by the 2840 * nfsd server. (The nfsd server handles conflicts between the 2841 * various clients.) 2842 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2843 * bytes, so it can't be put in l_sysid. 2844 */ 2845 if (nfsv4_sysid == 0) 2846 nfsv4_sysid = nlm_acquire_next_sysid(); 2847 fl.l_pid = (pid_t)0; 2848 fl.l_sysid = (int)nfsv4_sysid; 2849 2850 NFSVOPUNLOCK(vp, 0, td); 2851 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 2852 (F_POSIX | F_REMOTE)); 2853 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, td); 2854 return (error); 2855} 2856 2857/* 2858 * Unlock an underlying local file system. 2859 */ 2860void 2861nfsvno_unlockvfs(struct mount *mp) 2862{ 2863 2864 VFS_UNLOCK_GIANT(mp); 2865} 2866 2867/* 2868 * Lock an underlying file system, as required, and return 2869 * whether or not it is locked. 2870 */ 2871int 2872nfsvno_lockvfs(struct mount *mp) 2873{ 2874 int ret; 2875 2876 ret = VFS_LOCK_GIANT(mp); 2877 return (ret); 2878} 2879 2880/* 2881 * Check the nfsv4 root exports. 2882 */ 2883int 2884nfsvno_v4rootexport(struct nfsrv_descript *nd) 2885{ 2886 struct ucred *credanon; 2887 int exflags, error, numsecflavor, *secflavors, i; 2888 2889 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 2890 &credanon, &numsecflavor, &secflavors); 2891 if (error) 2892 return (NFSERR_PROGUNAVAIL); 2893 if (credanon != NULL) 2894 crfree(credanon); 2895 for (i = 0; i < numsecflavor; i++) { 2896 if (secflavors[i] == AUTH_SYS) 2897 nd->nd_flag |= ND_EXAUTHSYS; 2898 else if (secflavors[i] == RPCSEC_GSS_KRB5) 2899 nd->nd_flag |= ND_EXGSS; 2900 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 2901 nd->nd_flag |= ND_EXGSSINTEGRITY; 2902 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 2903 nd->nd_flag |= ND_EXGSSPRIVACY; 2904 } 2905 return (0); 2906} 2907 2908/* 2909 * Nfs server psuedo system call for the nfsd's 2910 */ 2911/* 2912 * MPSAFE 2913 */ 2914static int 2915nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 2916{ 2917 struct file *fp; 2918 struct nfsd_addsock_args sockarg; 2919 struct nfsd_nfsd_args nfsdarg; 2920 int error; 2921 2922 if (uap->flag & NFSSVC_NFSDADDSOCK) { 2923 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 2924 if (error) 2925 return (error); 2926 if ((error = fget(td, sockarg.sock, &fp)) != 0) { 2927 return (error); 2928 } 2929 if (fp->f_type != DTYPE_SOCKET) { 2930 fdrop(fp, td); 2931 return (EPERM); 2932 } 2933 error = nfsrvd_addsock(fp); 2934 fdrop(fp, td); 2935 } else if (uap->flag & NFSSVC_NFSDNFSD) { 2936 if (uap->argp == NULL) 2937 return (EINVAL); 2938 error = copyin(uap->argp, (caddr_t)&nfsdarg, 2939 sizeof (nfsdarg)); 2940 if (error) 2941 return (error); 2942 error = nfsrvd_nfsd(td, &nfsdarg); 2943 } else { 2944 error = nfssvc_srvcall(td, uap, td->td_ucred); 2945 } 2946 return (error); 2947} 2948 2949static int 2950nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 2951{ 2952 struct nfsex_args export; 2953 struct file *fp = NULL; 2954 int stablefd, len; 2955 struct nfsd_clid adminrevoke; 2956 struct nfsd_dumplist dumplist; 2957 struct nfsd_dumpclients *dumpclients; 2958 struct nfsd_dumplocklist dumplocklist; 2959 struct nfsd_dumplocks *dumplocks; 2960 struct nameidata nd; 2961 vnode_t vp; 2962 int error = EINVAL; 2963 2964 if (uap->flag & NFSSVC_PUBLICFH) { 2965 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 2966 sizeof (fhandle_t)); 2967 error = copyin(uap->argp, 2968 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 2969 if (!error) 2970 nfs_pubfhset = 1; 2971 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 2972 error = copyin(uap->argp,(caddr_t)&export, 2973 sizeof (struct nfsex_args)); 2974 if (!error) 2975 error = nfsrv_v4rootexport(&export, cred, p); 2976 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 2977 nfs_pubfhset = 0; 2978 error = 0; 2979 } else if (uap->flag & NFSSVC_STABLERESTART) { 2980 error = copyin(uap->argp, (caddr_t)&stablefd, 2981 sizeof (int)); 2982 if (!error) 2983 error = fp_getfvp(p, stablefd, &fp, &vp); 2984 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 2985 error = EBADF; 2986 if (!error && newnfs_numnfsd != 0) 2987 error = EPERM; 2988 if (!error) { 2989 nfsrv_stablefirst.nsf_fp = fp; 2990 nfsrv_setupstable(p); 2991 } 2992 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 2993 error = copyin(uap->argp, (caddr_t)&adminrevoke, 2994 sizeof (struct nfsd_clid)); 2995 if (!error) 2996 error = nfsrv_adminrevoke(&adminrevoke, p); 2997 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 2998 error = copyin(uap->argp, (caddr_t)&dumplist, 2999 sizeof (struct nfsd_dumplist)); 3000 if (!error && (dumplist.ndl_size < 1 || 3001 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3002 error = EPERM; 3003 if (!error) { 3004 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3005 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3006 M_TEMP, M_WAITOK); 3007 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3008 error = copyout(dumpclients, 3009 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3010 free((caddr_t)dumpclients, M_TEMP); 3011 } 3012 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3013 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3014 sizeof (struct nfsd_dumplocklist)); 3015 if (!error && (dumplocklist.ndllck_size < 1 || 3016 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3017 error = EPERM; 3018 if (!error) 3019 error = nfsrv_lookupfilename(&nd, 3020 dumplocklist.ndllck_fname, p); 3021 if (!error) { 3022 len = sizeof (struct nfsd_dumplocks) * 3023 dumplocklist.ndllck_size; 3024 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3025 M_TEMP, M_WAITOK); 3026 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3027 dumplocklist.ndllck_size, p); 3028 vput(nd.ni_vp); 3029 error = copyout(dumplocks, 3030 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3031 free((caddr_t)dumplocks, M_TEMP); 3032 } 3033 } 3034 return (error); 3035} 3036 3037/* 3038 * Check exports. 3039 * Returns 0 if ok, 1 otherwise. 3040 */ 3041int 3042nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3043{ 3044 int i; 3045 3046 /* 3047 * This seems odd, but allow the case where the security flavor 3048 * list is empty. This happens when NFSv4 is traversing non-exported 3049 * file systems. Exported file systems should always have a non-empty 3050 * security flavor list. 3051 */ 3052 if (exp->nes_numsecflavor == 0) 3053 return (0); 3054 3055 for (i = 0; i < exp->nes_numsecflavor; i++) { 3056 /* 3057 * The tests for privacy and integrity must be first, 3058 * since ND_GSS is set for everything but AUTH_SYS. 3059 */ 3060 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3061 (nd->nd_flag & ND_GSSPRIVACY)) 3062 return (0); 3063 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3064 (nd->nd_flag & ND_GSSINTEGRITY)) 3065 return (0); 3066 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3067 (nd->nd_flag & ND_GSS)) 3068 return (0); 3069 if (exp->nes_secflavors[i] == AUTH_SYS && 3070 (nd->nd_flag & ND_GSS) == 0) 3071 return (0); 3072 } 3073 return (1); 3074} 3075 3076extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3077 3078/* 3079 * Called once to initialize data structures... 3080 */ 3081static int 3082nfsd_modevent(module_t mod, int type, void *data) 3083{ 3084 int error = 0; 3085 static int loaded = 0; 3086 3087 switch (type) { 3088 case MOD_LOAD: 3089 if (loaded) 3090 return (0); 3091 newnfs_portinit(); 3092 mtx_init(&nfs_cache_mutex, "nfs_cache_mutex", NULL, MTX_DEF); 3093 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF); 3094 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL, 3095 MTX_DEF); 3096 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3097 nfsrvd_initcache(); 3098 nfsd_init(); 3099 NFSD_LOCK(); 3100 nfsrvd_init(0); 3101 NFSD_UNLOCK(); 3102 nfsd_mntinit(); 3103#ifdef VV_DISABLEDELEG 3104 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3105 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3106#endif 3107 nfsd_call_servertimer = nfsrv_servertimer; 3108 nfsd_call_nfsd = nfssvc_nfsd; 3109 loaded = 1; 3110 break; 3111 3112 case MOD_UNLOAD: 3113 if (newnfs_numnfsd != 0) { 3114 error = EBUSY; 3115 break; 3116 } 3117 3118#ifdef VV_DISABLEDELEG 3119 vn_deleg_ops.vndeleg_recall = NULL; 3120 vn_deleg_ops.vndeleg_disable = NULL; 3121#endif 3122 nfsd_call_servertimer = NULL; 3123 nfsd_call_nfsd = NULL; 3124 /* and get rid of the locks */ 3125 mtx_destroy(&nfs_cache_mutex); 3126 mtx_destroy(&nfs_v4root_mutex); 3127 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3128 lockdestroy(&nfsv4root_mnt.mnt_explock); 3129 loaded = 0; 3130 break; 3131 default: 3132 error = EOPNOTSUPP; 3133 break; 3134 } 3135 return error; 3136} 3137static moduledata_t nfsd_mod = { 3138 "nfsd", 3139 nfsd_modevent, 3140 NULL, 3141}; 3142DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3143 3144/* So that loader and kldload(2) can find us, wherever we are.. */ 3145MODULE_VERSION(nfsd, 1); 3146MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3147MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3148 3149