nfs_nfsdport.c revision 317914
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: stable/10/sys/fs/nfsserver/nfs_nfsdport.c 317914 2017-05-07 19:57:45Z rmacklem $"); 36 37#include <sys/capsicum.h> 38 39/* 40 * Functions that perform the vfs operations required by the routines in 41 * nfsd_serv.c. It is hoped that this change will make the server more 42 * portable. 43 */ 44 45#include <fs/nfs/nfsport.h> 46#include <sys/hash.h> 47#include <sys/sysctl.h> 48#include <nlm/nlm_prot.h> 49#include <nlm/nlm.h> 50 51FEATURE(nfsd, "NFSv4 server"); 52 53extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 54extern int nfsrv_useacl; 55extern int newnfs_numnfsd; 56extern struct mount nfsv4root_mnt; 57extern struct nfsrv_stablefirst nfsrv_stablefirst; 58extern void (*nfsd_call_servertimer)(void); 59extern SVCPOOL *nfsrvd_pool; 60extern struct nfsv4lock nfsd_suspend_lock; 61extern struct nfsclienthashhead *nfsclienthash; 62extern struct nfslockhashhead *nfslockhash; 63extern struct nfssessionhash *nfssessionhash; 64extern int nfsrv_sessionhashsize; 65struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 66NFSDLOCKMUTEX; 67struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 68struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 69struct mtx nfsrc_udpmtx; 70struct mtx nfs_v4root_mutex; 71struct nfsrvfh nfs_rootfh, nfs_pubfh; 72int nfs_pubfhset = 0, nfs_rootfhset = 0; 73struct proc *nfsd_master_proc = NULL; 74int nfsd_debuglevel = 0; 75static pid_t nfsd_master_pid = (pid_t)-1; 76static char nfsd_master_comm[MAXCOMLEN + 1]; 77static struct timeval nfsd_master_start; 78static uint32_t nfsv4_sysid = 0; 79 80static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 81 struct ucred *); 82 83int nfsrv_enable_crossmntpt = 1; 84static int nfs_commit_blks; 85static int nfs_commit_miss; 86extern int nfsrv_issuedelegs; 87extern int nfsrv_dolocallocks; 88extern int nfsd_enable_stringtouid; 89 90SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server"); 91SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 92 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 93SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 94 0, ""); 95SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 96 0, ""); 97SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 98 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 99SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 100 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 101SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 102 0, "Debug level for new nfs server"); 103SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 104 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 105 106#define MAX_REORDERED_RPC 16 107#define NUM_HEURISTIC 1031 108#define NHUSE_INIT 64 109#define NHUSE_INC 16 110#define NHUSE_MAX 2048 111 112static struct nfsheur { 113 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 114 off_t nh_nextoff; /* next offset for sequential detection */ 115 int nh_use; /* use count for selection */ 116 int nh_seqcount; /* heuristic */ 117} nfsheur[NUM_HEURISTIC]; 118 119 120/* 121 * Heuristic to detect sequential operation. 122 */ 123static struct nfsheur * 124nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 125{ 126 struct nfsheur *nh; 127 int hi, try; 128 129 /* Locate best candidate. */ 130 try = 32; 131 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 132 nh = &nfsheur[hi]; 133 while (try--) { 134 if (nfsheur[hi].nh_vp == vp) { 135 nh = &nfsheur[hi]; 136 break; 137 } 138 if (nfsheur[hi].nh_use > 0) 139 --nfsheur[hi].nh_use; 140 hi = (hi + 1) % NUM_HEURISTIC; 141 if (nfsheur[hi].nh_use < nh->nh_use) 142 nh = &nfsheur[hi]; 143 } 144 145 /* Initialize hint if this is a new file. */ 146 if (nh->nh_vp != vp) { 147 nh->nh_vp = vp; 148 nh->nh_nextoff = uio->uio_offset; 149 nh->nh_use = NHUSE_INIT; 150 if (uio->uio_offset == 0) 151 nh->nh_seqcount = 4; 152 else 153 nh->nh_seqcount = 1; 154 } 155 156 /* Calculate heuristic. */ 157 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 158 uio->uio_offset == nh->nh_nextoff) { 159 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 160 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 161 if (nh->nh_seqcount > IO_SEQMAX) 162 nh->nh_seqcount = IO_SEQMAX; 163 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 164 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 165 /* Probably a reordered RPC, leave seqcount alone. */ 166 } else if (nh->nh_seqcount > 1) { 167 nh->nh_seqcount /= 2; 168 } else { 169 nh->nh_seqcount = 0; 170 } 171 nh->nh_use += NHUSE_INC; 172 if (nh->nh_use > NHUSE_MAX) 173 nh->nh_use = NHUSE_MAX; 174 return (nh); 175} 176 177/* 178 * Get attributes into nfsvattr structure. 179 */ 180int 181nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 182 struct thread *p, int vpislocked) 183{ 184 int error, lockedit = 0; 185 186 if (vpislocked == 0) { 187 /* 188 * When vpislocked == 0, the vnode is either exclusively 189 * locked by this thread or not locked by this thread. 190 * As such, shared lock it, if not exclusively locked. 191 */ 192 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 193 lockedit = 1; 194 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 195 } 196 } 197 error = VOP_GETATTR(vp, &nvap->na_vattr, cred); 198 if (lockedit != 0) 199 NFSVOPUNLOCK(vp, 0); 200 201 NFSEXITCODE(error); 202 return (error); 203} 204 205/* 206 * Get a file handle for a vnode. 207 */ 208int 209nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 210{ 211 int error; 212 213 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 214 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 215 error = VOP_VPTOFH(vp, &fhp->fh_fid); 216 217 NFSEXITCODE(error); 218 return (error); 219} 220 221/* 222 * Perform access checking for vnodes obtained from file handles that would 223 * refer to files already opened by a Unix client. You cannot just use 224 * vn_writechk() and VOP_ACCESSX() for two reasons. 225 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 226 * case. 227 * 2 - The owner is to be given access irrespective of mode bits for some 228 * operations, so that processes that chmod after opening a file don't 229 * break. 230 */ 231int 232nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 233 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 234 u_int32_t *supportedtypep) 235{ 236 struct vattr vattr; 237 int error = 0, getret = 0; 238 239 if (vpislocked == 0) { 240 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 241 error = EPERM; 242 goto out; 243 } 244 } 245 if (accmode & VWRITE) { 246 /* Just vn_writechk() changed to check rdonly */ 247 /* 248 * Disallow write attempts on read-only file systems; 249 * unless the file is a socket or a block or character 250 * device resident on the file system. 251 */ 252 if (NFSVNO_EXRDONLY(exp) || 253 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 254 switch (vp->v_type) { 255 case VREG: 256 case VDIR: 257 case VLNK: 258 error = EROFS; 259 default: 260 break; 261 } 262 } 263 /* 264 * If there's shared text associated with 265 * the inode, try to free it up once. If 266 * we fail, we can't allow writing. 267 */ 268 if (VOP_IS_TEXT(vp) && error == 0) 269 error = ETXTBSY; 270 } 271 if (error != 0) { 272 if (vpislocked == 0) 273 NFSVOPUNLOCK(vp, 0); 274 goto out; 275 } 276 277 /* 278 * Should the override still be applied when ACLs are enabled? 279 */ 280 error = VOP_ACCESSX(vp, accmode, cred, p); 281 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 282 /* 283 * Try again with VEXPLICIT_DENY, to see if the test for 284 * deletion is supported. 285 */ 286 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 287 if (error == 0) { 288 if (vp->v_type == VDIR) { 289 accmode &= ~(VDELETE | VDELETE_CHILD); 290 accmode |= VWRITE; 291 error = VOP_ACCESSX(vp, accmode, cred, p); 292 } else if (supportedtypep != NULL) { 293 *supportedtypep &= ~NFSACCESS_DELETE; 294 } 295 } 296 } 297 298 /* 299 * Allow certain operations for the owner (reads and writes 300 * on files that are already open). 301 */ 302 if (override != NFSACCCHK_NOOVERRIDE && 303 (error == EPERM || error == EACCES)) { 304 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 305 error = 0; 306 else if (override & NFSACCCHK_ALLOWOWNER) { 307 getret = VOP_GETATTR(vp, &vattr, cred); 308 if (getret == 0 && cred->cr_uid == vattr.va_uid) 309 error = 0; 310 } 311 } 312 if (vpislocked == 0) 313 NFSVOPUNLOCK(vp, 0); 314 315out: 316 NFSEXITCODE(error); 317 return (error); 318} 319 320/* 321 * Set attribute(s) vnop. 322 */ 323int 324nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 325 struct thread *p, struct nfsexstuff *exp) 326{ 327 int error; 328 329 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 330 NFSEXITCODE(error); 331 return (error); 332} 333 334/* 335 * Set up nameidata for a lookup() call and do it. 336 */ 337int 338nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 339 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 340 struct vnode **retdirp) 341{ 342 struct componentname *cnp = &ndp->ni_cnd; 343 int i; 344 struct iovec aiov; 345 struct uio auio; 346 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 347 int error = 0, crossmnt; 348 char *cp; 349 350 *retdirp = NULL; 351 cnp->cn_nameptr = cnp->cn_pnbuf; 352 ndp->ni_strictrelative = 0; 353 /* 354 * Extract and set starting directory. 355 */ 356 if (dp->v_type != VDIR) { 357 if (islocked) 358 vput(dp); 359 else 360 vrele(dp); 361 nfsvno_relpathbuf(ndp); 362 error = ENOTDIR; 363 goto out1; 364 } 365 if (islocked) 366 NFSVOPUNLOCK(dp, 0); 367 VREF(dp); 368 *retdirp = dp; 369 if (NFSVNO_EXRDONLY(exp)) 370 cnp->cn_flags |= RDONLY; 371 ndp->ni_segflg = UIO_SYSSPACE; 372 crossmnt = 1; 373 374 if (nd->nd_flag & ND_PUBLOOKUP) { 375 ndp->ni_loopcnt = 0; 376 if (cnp->cn_pnbuf[0] == '/') { 377 vrele(dp); 378 /* 379 * Check for degenerate pathnames here, since lookup() 380 * panics on them. 381 */ 382 for (i = 1; i < ndp->ni_pathlen; i++) 383 if (cnp->cn_pnbuf[i] != '/') 384 break; 385 if (i == ndp->ni_pathlen) { 386 error = NFSERR_ACCES; 387 goto out; 388 } 389 dp = rootvnode; 390 VREF(dp); 391 } 392 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 393 (nd->nd_flag & ND_NFSV4) == 0) { 394 /* 395 * Only cross mount points for NFSv4 when doing a 396 * mount while traversing the file system above 397 * the mount point, unless nfsrv_enable_crossmntpt is set. 398 */ 399 cnp->cn_flags |= NOCROSSMOUNT; 400 crossmnt = 0; 401 } 402 403 /* 404 * Initialize for scan, set ni_startdir and bump ref on dp again 405 * because lookup() will dereference ni_startdir. 406 */ 407 408 cnp->cn_thread = p; 409 ndp->ni_startdir = dp; 410 ndp->ni_rootdir = rootvnode; 411 ndp->ni_topdir = NULL; 412 413 if (!lockleaf) 414 cnp->cn_flags |= LOCKLEAF; 415 for (;;) { 416 cnp->cn_nameptr = cnp->cn_pnbuf; 417 /* 418 * Call lookup() to do the real work. If an error occurs, 419 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 420 * we do not have to dereference anything before returning. 421 * In either case ni_startdir will be dereferenced and NULLed 422 * out. 423 */ 424 error = lookup(ndp); 425 if (error) 426 break; 427 428 /* 429 * Check for encountering a symbolic link. Trivial 430 * termination occurs if no symlink encountered. 431 */ 432 if ((cnp->cn_flags & ISSYMLINK) == 0) { 433 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 434 nfsvno_relpathbuf(ndp); 435 if (ndp->ni_vp && !lockleaf) 436 NFSVOPUNLOCK(ndp->ni_vp, 0); 437 break; 438 } 439 440 /* 441 * Validate symlink 442 */ 443 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 444 NFSVOPUNLOCK(ndp->ni_dvp, 0); 445 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 446 error = EINVAL; 447 goto badlink2; 448 } 449 450 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 451 error = ELOOP; 452 goto badlink2; 453 } 454 if (ndp->ni_pathlen > 1) 455 cp = uma_zalloc(namei_zone, M_WAITOK); 456 else 457 cp = cnp->cn_pnbuf; 458 aiov.iov_base = cp; 459 aiov.iov_len = MAXPATHLEN; 460 auio.uio_iov = &aiov; 461 auio.uio_iovcnt = 1; 462 auio.uio_offset = 0; 463 auio.uio_rw = UIO_READ; 464 auio.uio_segflg = UIO_SYSSPACE; 465 auio.uio_td = NULL; 466 auio.uio_resid = MAXPATHLEN; 467 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 468 if (error) { 469 badlink1: 470 if (ndp->ni_pathlen > 1) 471 uma_zfree(namei_zone, cp); 472 badlink2: 473 vrele(ndp->ni_dvp); 474 vput(ndp->ni_vp); 475 break; 476 } 477 linklen = MAXPATHLEN - auio.uio_resid; 478 if (linklen == 0) { 479 error = ENOENT; 480 goto badlink1; 481 } 482 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 483 error = ENAMETOOLONG; 484 goto badlink1; 485 } 486 487 /* 488 * Adjust or replace path 489 */ 490 if (ndp->ni_pathlen > 1) { 491 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 492 uma_zfree(namei_zone, cnp->cn_pnbuf); 493 cnp->cn_pnbuf = cp; 494 } else 495 cnp->cn_pnbuf[linklen] = '\0'; 496 ndp->ni_pathlen += linklen; 497 498 /* 499 * Cleanup refs for next loop and check if root directory 500 * should replace current directory. Normally ni_dvp 501 * becomes the new base directory and is cleaned up when 502 * we loop. Explicitly null pointers after invalidation 503 * to clarify operation. 504 */ 505 vput(ndp->ni_vp); 506 ndp->ni_vp = NULL; 507 508 if (cnp->cn_pnbuf[0] == '/') { 509 vrele(ndp->ni_dvp); 510 ndp->ni_dvp = ndp->ni_rootdir; 511 VREF(ndp->ni_dvp); 512 } 513 ndp->ni_startdir = ndp->ni_dvp; 514 ndp->ni_dvp = NULL; 515 } 516 if (!lockleaf) 517 cnp->cn_flags &= ~LOCKLEAF; 518 519out: 520 if (error) { 521 nfsvno_relpathbuf(ndp); 522 ndp->ni_vp = NULL; 523 ndp->ni_dvp = NULL; 524 ndp->ni_startdir = NULL; 525 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 526 ndp->ni_dvp = NULL; 527 } 528 529out1: 530 NFSEXITCODE2(error, nd); 531 return (error); 532} 533 534/* 535 * Set up a pathname buffer and return a pointer to it and, optionally 536 * set a hash pointer. 537 */ 538void 539nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 540{ 541 struct componentname *cnp = &ndp->ni_cnd; 542 543 cnp->cn_flags |= (NOMACCHECK | HASBUF); 544 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 545 if (hashpp != NULL) 546 *hashpp = NULL; 547 *bufpp = cnp->cn_pnbuf; 548} 549 550/* 551 * Release the above path buffer, if not released by nfsvno_namei(). 552 */ 553void 554nfsvno_relpathbuf(struct nameidata *ndp) 555{ 556 557 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 558 panic("nfsrelpath"); 559 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 560 ndp->ni_cnd.cn_flags &= ~HASBUF; 561} 562 563/* 564 * Readlink vnode op into an mbuf list. 565 */ 566int 567nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 568 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 569{ 570 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 571 struct iovec *ivp = iv; 572 struct uio io, *uiop = &io; 573 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 574 int i, len, tlen, error = 0; 575 576 len = 0; 577 i = 0; 578 while (len < NFS_MAXPATHLEN) { 579 NFSMGET(mp); 580 MCLGET(mp, M_WAITOK); 581 mp->m_len = NFSMSIZ(mp); 582 if (len == 0) { 583 mp3 = mp2 = mp; 584 } else { 585 mp2->m_next = mp; 586 mp2 = mp; 587 } 588 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 589 mp->m_len = NFS_MAXPATHLEN - len; 590 len = NFS_MAXPATHLEN; 591 } else { 592 len += mp->m_len; 593 } 594 ivp->iov_base = mtod(mp, caddr_t); 595 ivp->iov_len = mp->m_len; 596 i++; 597 ivp++; 598 } 599 uiop->uio_iov = iv; 600 uiop->uio_iovcnt = i; 601 uiop->uio_offset = 0; 602 uiop->uio_resid = len; 603 uiop->uio_rw = UIO_READ; 604 uiop->uio_segflg = UIO_SYSSPACE; 605 uiop->uio_td = NULL; 606 error = VOP_READLINK(vp, uiop, cred); 607 if (error) { 608 m_freem(mp3); 609 *lenp = 0; 610 goto out; 611 } 612 if (uiop->uio_resid > 0) { 613 len -= uiop->uio_resid; 614 tlen = NFSM_RNDUP(len); 615 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 616 } 617 *lenp = len; 618 *mpp = mp3; 619 *mpendp = mp; 620 621out: 622 NFSEXITCODE(error); 623 return (error); 624} 625 626/* 627 * Read vnode op call into mbuf list. 628 */ 629int 630nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 631 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 632{ 633 struct mbuf *m; 634 int i; 635 struct iovec *iv; 636 struct iovec *iv2; 637 int error = 0, len, left, siz, tlen, ioflag = 0; 638 struct mbuf *m2 = NULL, *m3; 639 struct uio io, *uiop = &io; 640 struct nfsheur *nh; 641 642 len = left = NFSM_RNDUP(cnt); 643 m3 = NULL; 644 /* 645 * Generate the mbuf list with the uio_iov ref. to it. 646 */ 647 i = 0; 648 while (left > 0) { 649 NFSMGET(m); 650 MCLGET(m, M_WAITOK); 651 m->m_len = 0; 652 siz = min(M_TRAILINGSPACE(m), left); 653 left -= siz; 654 i++; 655 if (m3) 656 m2->m_next = m; 657 else 658 m3 = m; 659 m2 = m; 660 } 661 MALLOC(iv, struct iovec *, i * sizeof (struct iovec), 662 M_TEMP, M_WAITOK); 663 uiop->uio_iov = iv2 = iv; 664 m = m3; 665 left = len; 666 i = 0; 667 while (left > 0) { 668 if (m == NULL) 669 panic("nfsvno_read iov"); 670 siz = min(M_TRAILINGSPACE(m), left); 671 if (siz > 0) { 672 iv->iov_base = mtod(m, caddr_t) + m->m_len; 673 iv->iov_len = siz; 674 m->m_len += siz; 675 left -= siz; 676 iv++; 677 i++; 678 } 679 m = m->m_next; 680 } 681 uiop->uio_iovcnt = i; 682 uiop->uio_offset = off; 683 uiop->uio_resid = len; 684 uiop->uio_rw = UIO_READ; 685 uiop->uio_segflg = UIO_SYSSPACE; 686 uiop->uio_td = NULL; 687 nh = nfsrv_sequential_heuristic(uiop, vp); 688 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 689 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 690 FREE((caddr_t)iv2, M_TEMP); 691 if (error) { 692 m_freem(m3); 693 *mpp = NULL; 694 goto out; 695 } 696 nh->nh_nextoff = uiop->uio_offset; 697 tlen = len - uiop->uio_resid; 698 cnt = cnt < tlen ? cnt : tlen; 699 tlen = NFSM_RNDUP(cnt); 700 if (tlen == 0) { 701 m_freem(m3); 702 m3 = NULL; 703 } else if (len != tlen || tlen != cnt) 704 nfsrv_adj(m3, len - tlen, tlen - cnt); 705 *mpp = m3; 706 *mpendp = m2; 707 708out: 709 NFSEXITCODE(error); 710 return (error); 711} 712 713/* 714 * Write vnode op from an mbuf list. 715 */ 716int 717nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable, 718 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 719{ 720 struct iovec *ivp; 721 int i, len; 722 struct iovec *iv; 723 int ioflags, error; 724 struct uio io, *uiop = &io; 725 struct nfsheur *nh; 726 727 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, 728 M_WAITOK); 729 uiop->uio_iov = iv = ivp; 730 uiop->uio_iovcnt = cnt; 731 i = mtod(mp, caddr_t) + mp->m_len - cp; 732 len = retlen; 733 while (len > 0) { 734 if (mp == NULL) 735 panic("nfsvno_write"); 736 if (i > 0) { 737 i = min(i, len); 738 ivp->iov_base = cp; 739 ivp->iov_len = i; 740 ivp++; 741 len -= i; 742 } 743 mp = mp->m_next; 744 if (mp) { 745 i = mp->m_len; 746 cp = mtod(mp, caddr_t); 747 } 748 } 749 750 if (stable == NFSWRITE_UNSTABLE) 751 ioflags = IO_NODELOCKED; 752 else 753 ioflags = (IO_SYNC | IO_NODELOCKED); 754 uiop->uio_resid = retlen; 755 uiop->uio_rw = UIO_WRITE; 756 uiop->uio_segflg = UIO_SYSSPACE; 757 NFSUIOPROC(uiop, p); 758 uiop->uio_offset = off; 759 nh = nfsrv_sequential_heuristic(uiop, vp); 760 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 761 error = VOP_WRITE(vp, uiop, ioflags, cred); 762 if (error == 0) 763 nh->nh_nextoff = uiop->uio_offset; 764 FREE((caddr_t)iv, M_TEMP); 765 766 NFSEXITCODE(error); 767 return (error); 768} 769 770/* 771 * Common code for creating a regular file (plus special files for V2). 772 */ 773int 774nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 775 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 776 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 777{ 778 u_quad_t tempsize; 779 int error; 780 781 error = nd->nd_repstat; 782 if (!error && ndp->ni_vp == NULL) { 783 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 784 vrele(ndp->ni_startdir); 785 error = VOP_CREATE(ndp->ni_dvp, 786 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 787 vput(ndp->ni_dvp); 788 nfsvno_relpathbuf(ndp); 789 if (!error) { 790 if (*exclusive_flagp) { 791 *exclusive_flagp = 0; 792 NFSVNO_ATTRINIT(nvap); 793 nvap->na_atime.tv_sec = cverf[0]; 794 nvap->na_atime.tv_nsec = cverf[1]; 795 error = VOP_SETATTR(ndp->ni_vp, 796 &nvap->na_vattr, nd->nd_cred); 797 if (error != 0) { 798 vput(ndp->ni_vp); 799 ndp->ni_vp = NULL; 800 error = NFSERR_NOTSUPP; 801 } 802 } 803 } 804 /* 805 * NFS V2 Only. nfsrvd_mknod() does this for V3. 806 * (This implies, just get out on an error.) 807 */ 808 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 809 nvap->na_type == VFIFO) { 810 if (nvap->na_type == VCHR && rdev == 0xffffffff) 811 nvap->na_type = VFIFO; 812 if (nvap->na_type != VFIFO && 813 (error = priv_check_cred(nd->nd_cred, 814 PRIV_VFS_MKNOD_DEV, 0))) { 815 vrele(ndp->ni_startdir); 816 nfsvno_relpathbuf(ndp); 817 vput(ndp->ni_dvp); 818 goto out; 819 } 820 nvap->na_rdev = rdev; 821 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 822 &ndp->ni_cnd, &nvap->na_vattr); 823 vput(ndp->ni_dvp); 824 nfsvno_relpathbuf(ndp); 825 vrele(ndp->ni_startdir); 826 if (error) 827 goto out; 828 } else { 829 vrele(ndp->ni_startdir); 830 nfsvno_relpathbuf(ndp); 831 vput(ndp->ni_dvp); 832 error = ENXIO; 833 goto out; 834 } 835 *vpp = ndp->ni_vp; 836 } else { 837 /* 838 * Handle cases where error is already set and/or 839 * the file exists. 840 * 1 - clean up the lookup 841 * 2 - iff !error and na_size set, truncate it 842 */ 843 vrele(ndp->ni_startdir); 844 nfsvno_relpathbuf(ndp); 845 *vpp = ndp->ni_vp; 846 if (ndp->ni_dvp == *vpp) 847 vrele(ndp->ni_dvp); 848 else 849 vput(ndp->ni_dvp); 850 if (!error && nvap->na_size != VNOVAL) { 851 error = nfsvno_accchk(*vpp, VWRITE, 852 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 853 NFSACCCHK_VPISLOCKED, NULL); 854 if (!error) { 855 tempsize = nvap->na_size; 856 NFSVNO_ATTRINIT(nvap); 857 nvap->na_size = tempsize; 858 error = VOP_SETATTR(*vpp, 859 &nvap->na_vattr, nd->nd_cred); 860 } 861 } 862 if (error) 863 vput(*vpp); 864 } 865 866out: 867 NFSEXITCODE(error); 868 return (error); 869} 870 871/* 872 * Do a mknod vnode op. 873 */ 874int 875nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 876 struct thread *p) 877{ 878 int error = 0; 879 enum vtype vtyp; 880 881 vtyp = nvap->na_type; 882 /* 883 * Iff doesn't exist, create it. 884 */ 885 if (ndp->ni_vp) { 886 vrele(ndp->ni_startdir); 887 nfsvno_relpathbuf(ndp); 888 vput(ndp->ni_dvp); 889 vrele(ndp->ni_vp); 890 error = EEXIST; 891 goto out; 892 } 893 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 894 vrele(ndp->ni_startdir); 895 nfsvno_relpathbuf(ndp); 896 vput(ndp->ni_dvp); 897 error = NFSERR_BADTYPE; 898 goto out; 899 } 900 if (vtyp == VSOCK) { 901 vrele(ndp->ni_startdir); 902 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 903 &ndp->ni_cnd, &nvap->na_vattr); 904 vput(ndp->ni_dvp); 905 nfsvno_relpathbuf(ndp); 906 } else { 907 if (nvap->na_type != VFIFO && 908 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 909 vrele(ndp->ni_startdir); 910 nfsvno_relpathbuf(ndp); 911 vput(ndp->ni_dvp); 912 goto out; 913 } 914 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 915 &ndp->ni_cnd, &nvap->na_vattr); 916 vput(ndp->ni_dvp); 917 nfsvno_relpathbuf(ndp); 918 vrele(ndp->ni_startdir); 919 /* 920 * Since VOP_MKNOD returns the ni_vp, I can't 921 * see any reason to do the lookup. 922 */ 923 } 924 925out: 926 NFSEXITCODE(error); 927 return (error); 928} 929 930/* 931 * Mkdir vnode op. 932 */ 933int 934nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 935 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 936{ 937 int error = 0; 938 939 if (ndp->ni_vp != NULL) { 940 if (ndp->ni_dvp == ndp->ni_vp) 941 vrele(ndp->ni_dvp); 942 else 943 vput(ndp->ni_dvp); 944 vrele(ndp->ni_vp); 945 nfsvno_relpathbuf(ndp); 946 error = EEXIST; 947 goto out; 948 } 949 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 950 &nvap->na_vattr); 951 vput(ndp->ni_dvp); 952 nfsvno_relpathbuf(ndp); 953 954out: 955 NFSEXITCODE(error); 956 return (error); 957} 958 959/* 960 * symlink vnode op. 961 */ 962int 963nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 964 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 965 struct nfsexstuff *exp) 966{ 967 int error = 0; 968 969 if (ndp->ni_vp) { 970 vrele(ndp->ni_startdir); 971 nfsvno_relpathbuf(ndp); 972 if (ndp->ni_dvp == ndp->ni_vp) 973 vrele(ndp->ni_dvp); 974 else 975 vput(ndp->ni_dvp); 976 vrele(ndp->ni_vp); 977 error = EEXIST; 978 goto out; 979 } 980 981 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 982 &nvap->na_vattr, pathcp); 983 vput(ndp->ni_dvp); 984 vrele(ndp->ni_startdir); 985 nfsvno_relpathbuf(ndp); 986 /* 987 * Although FreeBSD still had the lookup code in 988 * it for 7/current, there doesn't seem to be any 989 * point, since VOP_SYMLINK() returns the ni_vp. 990 * Just vput it for v2. 991 */ 992 if (!not_v2 && !error) 993 vput(ndp->ni_vp); 994 995out: 996 NFSEXITCODE(error); 997 return (error); 998} 999 1000/* 1001 * Parse symbolic link arguments. 1002 * This function has an ugly side effect. It will MALLOC() an area for 1003 * the symlink and set iov_base to point to it, only if it succeeds. 1004 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1005 * be FREE'd later. 1006 */ 1007int 1008nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1009 struct thread *p, char **pathcpp, int *lenp) 1010{ 1011 u_int32_t *tl; 1012 char *pathcp = NULL; 1013 int error = 0, len; 1014 struct nfsv2_sattr *sp; 1015 1016 *pathcpp = NULL; 1017 *lenp = 0; 1018 if ((nd->nd_flag & ND_NFSV3) && 1019 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p))) 1020 goto nfsmout; 1021 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1022 len = fxdr_unsigned(int, *tl); 1023 if (len > NFS_MAXPATHLEN || len <= 0) { 1024 error = EBADRPC; 1025 goto nfsmout; 1026 } 1027 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK); 1028 error = nfsrv_mtostr(nd, pathcp, len); 1029 if (error) 1030 goto nfsmout; 1031 if (nd->nd_flag & ND_NFSV2) { 1032 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1033 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1034 } 1035 *pathcpp = pathcp; 1036 *lenp = len; 1037 NFSEXITCODE2(0, nd); 1038 return (0); 1039nfsmout: 1040 if (pathcp) 1041 free(pathcp, M_TEMP); 1042 NFSEXITCODE2(error, nd); 1043 return (error); 1044} 1045 1046/* 1047 * Remove a non-directory object. 1048 */ 1049int 1050nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1051 struct thread *p, struct nfsexstuff *exp) 1052{ 1053 struct vnode *vp; 1054 int error = 0; 1055 1056 vp = ndp->ni_vp; 1057 if (vp->v_type == VDIR) 1058 error = NFSERR_ISDIR; 1059 else if (is_v4) 1060 error = nfsrv_checkremove(vp, 1, p); 1061 if (!error) 1062 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1063 if (ndp->ni_dvp == vp) 1064 vrele(ndp->ni_dvp); 1065 else 1066 vput(ndp->ni_dvp); 1067 vput(vp); 1068 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1069 nfsvno_relpathbuf(ndp); 1070 NFSEXITCODE(error); 1071 return (error); 1072} 1073 1074/* 1075 * Remove a directory. 1076 */ 1077int 1078nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1079 struct thread *p, struct nfsexstuff *exp) 1080{ 1081 struct vnode *vp; 1082 int error = 0; 1083 1084 vp = ndp->ni_vp; 1085 if (vp->v_type != VDIR) { 1086 error = ENOTDIR; 1087 goto out; 1088 } 1089 /* 1090 * No rmdir "." please. 1091 */ 1092 if (ndp->ni_dvp == vp) { 1093 error = EINVAL; 1094 goto out; 1095 } 1096 /* 1097 * The root of a mounted filesystem cannot be deleted. 1098 */ 1099 if (vp->v_vflag & VV_ROOT) 1100 error = EBUSY; 1101out: 1102 if (!error) 1103 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1104 if (ndp->ni_dvp == vp) 1105 vrele(ndp->ni_dvp); 1106 else 1107 vput(ndp->ni_dvp); 1108 vput(vp); 1109 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1110 nfsvno_relpathbuf(ndp); 1111 NFSEXITCODE(error); 1112 return (error); 1113} 1114 1115/* 1116 * Rename vnode op. 1117 */ 1118int 1119nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1120 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1121{ 1122 struct vnode *fvp, *tvp, *tdvp; 1123 int error = 0; 1124 1125 fvp = fromndp->ni_vp; 1126 if (ndstat) { 1127 vrele(fromndp->ni_dvp); 1128 vrele(fvp); 1129 error = ndstat; 1130 goto out1; 1131 } 1132 tdvp = tondp->ni_dvp; 1133 tvp = tondp->ni_vp; 1134 if (tvp != NULL) { 1135 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1136 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1137 goto out; 1138 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1139 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1140 goto out; 1141 } 1142 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1143 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1144 goto out; 1145 } 1146 1147 /* 1148 * A rename to '.' or '..' results in a prematurely 1149 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1150 * here. 1151 */ 1152 if ((tondp->ni_cnd.cn_namelen == 1 && 1153 tondp->ni_cnd.cn_nameptr[0] == '.') || 1154 (tondp->ni_cnd.cn_namelen == 2 && 1155 tondp->ni_cnd.cn_nameptr[0] == '.' && 1156 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1157 error = EINVAL; 1158 goto out; 1159 } 1160 } 1161 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1162 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1163 goto out; 1164 } 1165 if (fvp->v_mount != tdvp->v_mount) { 1166 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1167 goto out; 1168 } 1169 if (fvp == tdvp) { 1170 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1171 goto out; 1172 } 1173 if (fvp == tvp) { 1174 /* 1175 * If source and destination are the same, there is nothing to 1176 * do. Set error to -1 to indicate this. 1177 */ 1178 error = -1; 1179 goto out; 1180 } 1181 if (ndflag & ND_NFSV4) { 1182 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1183 error = nfsrv_checkremove(fvp, 0, p); 1184 NFSVOPUNLOCK(fvp, 0); 1185 } else 1186 error = EPERM; 1187 if (tvp && !error) 1188 error = nfsrv_checkremove(tvp, 1, p); 1189 } else { 1190 /* 1191 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1192 * that the NFSv4 client won't be confused by the rename. 1193 * Since nfsd_recalldelegation() can only be called on an 1194 * unlocked vnode at this point and fvp is the file that will 1195 * still exist after the rename, just do fvp. 1196 */ 1197 nfsd_recalldelegation(fvp, p); 1198 } 1199out: 1200 if (!error) { 1201 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1202 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1203 &tondp->ni_cnd); 1204 } else { 1205 if (tdvp == tvp) 1206 vrele(tdvp); 1207 else 1208 vput(tdvp); 1209 if (tvp) 1210 vput(tvp); 1211 vrele(fromndp->ni_dvp); 1212 vrele(fvp); 1213 if (error == -1) 1214 error = 0; 1215 } 1216 vrele(tondp->ni_startdir); 1217 nfsvno_relpathbuf(tondp); 1218out1: 1219 vrele(fromndp->ni_startdir); 1220 nfsvno_relpathbuf(fromndp); 1221 NFSEXITCODE(error); 1222 return (error); 1223} 1224 1225/* 1226 * Link vnode op. 1227 */ 1228int 1229nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1230 struct thread *p, struct nfsexstuff *exp) 1231{ 1232 struct vnode *xp; 1233 int error = 0; 1234 1235 xp = ndp->ni_vp; 1236 if (xp != NULL) { 1237 error = EEXIST; 1238 } else { 1239 xp = ndp->ni_dvp; 1240 if (vp->v_mount != xp->v_mount) 1241 error = EXDEV; 1242 } 1243 if (!error) { 1244 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1245 if ((vp->v_iflag & VI_DOOMED) == 0) 1246 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1247 else 1248 error = EPERM; 1249 if (ndp->ni_dvp == vp) 1250 vrele(ndp->ni_dvp); 1251 else 1252 vput(ndp->ni_dvp); 1253 NFSVOPUNLOCK(vp, 0); 1254 } else { 1255 if (ndp->ni_dvp == ndp->ni_vp) 1256 vrele(ndp->ni_dvp); 1257 else 1258 vput(ndp->ni_dvp); 1259 if (ndp->ni_vp) 1260 vrele(ndp->ni_vp); 1261 } 1262 nfsvno_relpathbuf(ndp); 1263 NFSEXITCODE(error); 1264 return (error); 1265} 1266 1267/* 1268 * Do the fsync() appropriate for the commit. 1269 */ 1270int 1271nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1272 struct thread *td) 1273{ 1274 int error = 0; 1275 1276 /* 1277 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1278 * file is done. At this time VOP_FSYNC does not accept offset and 1279 * byte count parameters so call VOP_FSYNC the whole file for now. 1280 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1281 * File systems that do not use the buffer cache (as indicated 1282 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1283 */ 1284 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1285 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1286 /* 1287 * Give up and do the whole thing 1288 */ 1289 if (vp->v_object && 1290 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1291 VM_OBJECT_WLOCK(vp->v_object); 1292 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1293 VM_OBJECT_WUNLOCK(vp->v_object); 1294 } 1295 error = VOP_FSYNC(vp, MNT_WAIT, td); 1296 } else { 1297 /* 1298 * Locate and synchronously write any buffers that fall 1299 * into the requested range. Note: we are assuming that 1300 * f_iosize is a power of 2. 1301 */ 1302 int iosize = vp->v_mount->mnt_stat.f_iosize; 1303 int iomask = iosize - 1; 1304 struct bufobj *bo; 1305 daddr_t lblkno; 1306 1307 /* 1308 * Align to iosize boundry, super-align to page boundry. 1309 */ 1310 if (off & iomask) { 1311 cnt += off & iomask; 1312 off &= ~(u_quad_t)iomask; 1313 } 1314 if (off & PAGE_MASK) { 1315 cnt += off & PAGE_MASK; 1316 off &= ~(u_quad_t)PAGE_MASK; 1317 } 1318 lblkno = off / iosize; 1319 1320 if (vp->v_object && 1321 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1322 VM_OBJECT_WLOCK(vp->v_object); 1323 vm_object_page_clean(vp->v_object, off, off + cnt, 1324 OBJPC_SYNC); 1325 VM_OBJECT_WUNLOCK(vp->v_object); 1326 } 1327 1328 bo = &vp->v_bufobj; 1329 BO_LOCK(bo); 1330 while (cnt > 0) { 1331 struct buf *bp; 1332 1333 /* 1334 * If we have a buffer and it is marked B_DELWRI we 1335 * have to lock and write it. Otherwise the prior 1336 * write is assumed to have already been committed. 1337 * 1338 * gbincore() can return invalid buffers now so we 1339 * have to check that bit as well (though B_DELWRI 1340 * should not be set if B_INVAL is set there could be 1341 * a race here since we haven't locked the buffer). 1342 */ 1343 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1344 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1345 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1346 BO_LOCK(bo); 1347 continue; /* retry */ 1348 } 1349 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1350 B_DELWRI) { 1351 bremfree(bp); 1352 bp->b_flags &= ~B_ASYNC; 1353 bwrite(bp); 1354 ++nfs_commit_miss; 1355 } else 1356 BUF_UNLOCK(bp); 1357 BO_LOCK(bo); 1358 } 1359 ++nfs_commit_blks; 1360 if (cnt < iosize) 1361 break; 1362 cnt -= iosize; 1363 ++lblkno; 1364 } 1365 BO_UNLOCK(bo); 1366 } 1367 NFSEXITCODE(error); 1368 return (error); 1369} 1370 1371/* 1372 * Statfs vnode op. 1373 */ 1374int 1375nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1376{ 1377 int error; 1378 1379 error = VFS_STATFS(vp->v_mount, sf); 1380 if (error == 0) { 1381 /* 1382 * Since NFS handles these values as unsigned on the 1383 * wire, there is no way to represent negative values, 1384 * so set them to 0. Without this, they will appear 1385 * to be very large positive values for clients like 1386 * Solaris10. 1387 */ 1388 if (sf->f_bavail < 0) 1389 sf->f_bavail = 0; 1390 if (sf->f_ffree < 0) 1391 sf->f_ffree = 0; 1392 } 1393 NFSEXITCODE(error); 1394 return (error); 1395} 1396 1397/* 1398 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1399 * must handle nfsrv_opencheck() calls after any other access checks. 1400 */ 1401void 1402nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1403 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1404 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1405 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1406 struct nfsexstuff *exp, struct vnode **vpp) 1407{ 1408 struct vnode *vp = NULL; 1409 u_quad_t tempsize; 1410 struct nfsexstuff nes; 1411 1412 if (ndp->ni_vp == NULL) 1413 nd->nd_repstat = nfsrv_opencheck(clientid, 1414 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1415 if (!nd->nd_repstat) { 1416 if (ndp->ni_vp == NULL) { 1417 vrele(ndp->ni_startdir); 1418 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1419 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1420 vput(ndp->ni_dvp); 1421 nfsvno_relpathbuf(ndp); 1422 if (!nd->nd_repstat) { 1423 if (*exclusive_flagp) { 1424 *exclusive_flagp = 0; 1425 NFSVNO_ATTRINIT(nvap); 1426 nvap->na_atime.tv_sec = cverf[0]; 1427 nvap->na_atime.tv_nsec = cverf[1]; 1428 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1429 &nvap->na_vattr, cred); 1430 if (nd->nd_repstat != 0) { 1431 vput(ndp->ni_vp); 1432 ndp->ni_vp = NULL; 1433 nd->nd_repstat = NFSERR_NOTSUPP; 1434 } else 1435 NFSSETBIT_ATTRBIT(attrbitp, 1436 NFSATTRBIT_TIMEACCESS); 1437 } else { 1438 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1439 aclp, p, attrbitp, exp); 1440 } 1441 } 1442 vp = ndp->ni_vp; 1443 } else { 1444 if (ndp->ni_startdir) 1445 vrele(ndp->ni_startdir); 1446 nfsvno_relpathbuf(ndp); 1447 vp = ndp->ni_vp; 1448 if (create == NFSV4OPEN_CREATE) { 1449 if (ndp->ni_dvp == vp) 1450 vrele(ndp->ni_dvp); 1451 else 1452 vput(ndp->ni_dvp); 1453 } 1454 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1455 if (ndp->ni_cnd.cn_flags & RDONLY) 1456 NFSVNO_SETEXRDONLY(&nes); 1457 else 1458 NFSVNO_EXINIT(&nes); 1459 nd->nd_repstat = nfsvno_accchk(vp, 1460 VWRITE, cred, &nes, p, 1461 NFSACCCHK_NOOVERRIDE, 1462 NFSACCCHK_VPISLOCKED, NULL); 1463 nd->nd_repstat = nfsrv_opencheck(clientid, 1464 stateidp, stp, vp, nd, p, nd->nd_repstat); 1465 if (!nd->nd_repstat) { 1466 tempsize = nvap->na_size; 1467 NFSVNO_ATTRINIT(nvap); 1468 nvap->na_size = tempsize; 1469 nd->nd_repstat = VOP_SETATTR(vp, 1470 &nvap->na_vattr, cred); 1471 } 1472 } else if (vp->v_type == VREG) { 1473 nd->nd_repstat = nfsrv_opencheck(clientid, 1474 stateidp, stp, vp, nd, p, nd->nd_repstat); 1475 } 1476 } 1477 } else { 1478 if (ndp->ni_cnd.cn_flags & HASBUF) 1479 nfsvno_relpathbuf(ndp); 1480 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1481 vrele(ndp->ni_startdir); 1482 if (ndp->ni_dvp == ndp->ni_vp) 1483 vrele(ndp->ni_dvp); 1484 else 1485 vput(ndp->ni_dvp); 1486 if (ndp->ni_vp) 1487 vput(ndp->ni_vp); 1488 } 1489 } 1490 *vpp = vp; 1491 1492 NFSEXITCODE2(0, nd); 1493} 1494 1495/* 1496 * Updates the file rev and sets the mtime and ctime 1497 * to the current clock time, returning the va_filerev and va_Xtime 1498 * values. 1499 * Return ESTALE to indicate the vnode is VI_DOOMED. 1500 */ 1501int 1502nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1503 struct ucred *cred, struct thread *p) 1504{ 1505 struct vattr va; 1506 1507 VATTR_NULL(&va); 1508 vfs_timestamp(&va.va_mtime); 1509 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1510 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1511 if ((vp->v_iflag & VI_DOOMED) != 0) 1512 return (ESTALE); 1513 } 1514 (void) VOP_SETATTR(vp, &va, cred); 1515 (void) nfsvno_getattr(vp, nvap, cred, p, 1); 1516 return (0); 1517} 1518 1519/* 1520 * Glue routine to nfsv4_fillattr(). 1521 */ 1522int 1523nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1524 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1525 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1526 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1527{ 1528 int error; 1529 1530 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1531 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1532 mounted_on_fileno); 1533 NFSEXITCODE2(0, nd); 1534 return (error); 1535} 1536 1537/* Since the Readdir vnode ops vary, put the entire functions in here. */ 1538/* 1539 * nfs readdir service 1540 * - mallocs what it thinks is enough to read 1541 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1542 * - calls VOP_READDIR() 1543 * - loops around building the reply 1544 * if the output generated exceeds count break out of loop 1545 * The NFSM_CLGET macro is used here so that the reply will be packed 1546 * tightly in mbuf clusters. 1547 * - it trims out records with d_fileno == 0 1548 * this doesn't matter for Unix clients, but they might confuse clients 1549 * for other os'. 1550 * - it trims out records with d_type == DT_WHT 1551 * these cannot be seen through NFS (unless we extend the protocol) 1552 * The alternate call nfsrvd_readdirplus() does lookups as well. 1553 * PS: The NFS protocol spec. does not clarify what the "count" byte 1554 * argument is a count of.. just name strings and file id's or the 1555 * entire reply rpc or ... 1556 * I tried just file name and id sizes and it confused the Sun client, 1557 * so I am using the full rpc size now. The "paranoia.." comment refers 1558 * to including the status longwords that are not a part of the dir. 1559 * "entry" structures, but are in the rpc. 1560 */ 1561int 1562nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1563 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1564{ 1565 struct dirent *dp; 1566 u_int32_t *tl; 1567 int dirlen; 1568 char *cpos, *cend, *rbuf; 1569 struct nfsvattr at; 1570 int nlen, error = 0, getret = 1; 1571 int siz, cnt, fullsiz, eofflag, ncookies; 1572 u_int64_t off, toff, verf; 1573 u_long *cookies = NULL, *cookiep; 1574 struct uio io; 1575 struct iovec iv; 1576 int is_ufs; 1577 1578 if (nd->nd_repstat) { 1579 nfsrv_postopattr(nd, getret, &at); 1580 goto out; 1581 } 1582 if (nd->nd_flag & ND_NFSV2) { 1583 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1584 off = fxdr_unsigned(u_quad_t, *tl++); 1585 } else { 1586 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1587 off = fxdr_hyper(tl); 1588 tl += 2; 1589 verf = fxdr_hyper(tl); 1590 tl += 2; 1591 } 1592 toff = off; 1593 cnt = fxdr_unsigned(int, *tl); 1594 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1595 cnt = NFS_SRVMAXDATA(nd); 1596 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1597 fullsiz = siz; 1598 if (nd->nd_flag & ND_NFSV3) { 1599 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, 1600 p, 1); 1601#if 0 1602 /* 1603 * va_filerev is not sufficient as a cookie verifier, 1604 * since it is not supposed to change when entries are 1605 * removed/added unless that offset cookies returned to 1606 * the client are no longer valid. 1607 */ 1608 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1609 nd->nd_repstat = NFSERR_BAD_COOKIE; 1610#endif 1611 } 1612 if (!nd->nd_repstat && vp->v_type != VDIR) 1613 nd->nd_repstat = NFSERR_NOTDIR; 1614 if (nd->nd_repstat == 0 && cnt == 0) { 1615 if (nd->nd_flag & ND_NFSV2) 1616 /* NFSv2 does not have NFSERR_TOOSMALL */ 1617 nd->nd_repstat = EPERM; 1618 else 1619 nd->nd_repstat = NFSERR_TOOSMALL; 1620 } 1621 if (!nd->nd_repstat) 1622 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1623 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1624 NFSACCCHK_VPISLOCKED, NULL); 1625 if (nd->nd_repstat) { 1626 vput(vp); 1627 if (nd->nd_flag & ND_NFSV3) 1628 nfsrv_postopattr(nd, getret, &at); 1629 goto out; 1630 } 1631 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1632 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1633again: 1634 eofflag = 0; 1635 if (cookies) { 1636 free((caddr_t)cookies, M_TEMP); 1637 cookies = NULL; 1638 } 1639 1640 iv.iov_base = rbuf; 1641 iv.iov_len = siz; 1642 io.uio_iov = &iv; 1643 io.uio_iovcnt = 1; 1644 io.uio_offset = (off_t)off; 1645 io.uio_resid = siz; 1646 io.uio_segflg = UIO_SYSSPACE; 1647 io.uio_rw = UIO_READ; 1648 io.uio_td = NULL; 1649 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1650 &cookies); 1651 off = (u_int64_t)io.uio_offset; 1652 if (io.uio_resid) 1653 siz -= io.uio_resid; 1654 1655 if (!cookies && !nd->nd_repstat) 1656 nd->nd_repstat = NFSERR_PERM; 1657 if (nd->nd_flag & ND_NFSV3) { 1658 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1659 if (!nd->nd_repstat) 1660 nd->nd_repstat = getret; 1661 } 1662 1663 /* 1664 * Handles the failed cases. nd->nd_repstat == 0 past here. 1665 */ 1666 if (nd->nd_repstat) { 1667 vput(vp); 1668 free((caddr_t)rbuf, M_TEMP); 1669 if (cookies) 1670 free((caddr_t)cookies, M_TEMP); 1671 if (nd->nd_flag & ND_NFSV3) 1672 nfsrv_postopattr(nd, getret, &at); 1673 goto out; 1674 } 1675 /* 1676 * If nothing read, return eof 1677 * rpc reply 1678 */ 1679 if (siz == 0) { 1680 vput(vp); 1681 if (nd->nd_flag & ND_NFSV2) { 1682 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1683 } else { 1684 nfsrv_postopattr(nd, getret, &at); 1685 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1686 txdr_hyper(at.na_filerev, tl); 1687 tl += 2; 1688 } 1689 *tl++ = newnfs_false; 1690 *tl = newnfs_true; 1691 FREE((caddr_t)rbuf, M_TEMP); 1692 FREE((caddr_t)cookies, M_TEMP); 1693 goto out; 1694 } 1695 1696 /* 1697 * Check for degenerate cases of nothing useful read. 1698 * If so go try again 1699 */ 1700 cpos = rbuf; 1701 cend = rbuf + siz; 1702 dp = (struct dirent *)cpos; 1703 cookiep = cookies; 1704 1705 /* 1706 * For some reason FreeBSD's ufs_readdir() chooses to back the 1707 * directory offset up to a block boundary, so it is necessary to 1708 * skip over the records that precede the requested offset. This 1709 * requires the assumption that file offset cookies monotonically 1710 * increase. 1711 */ 1712 while (cpos < cend && ncookies > 0 && 1713 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1714 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 1715 cpos += dp->d_reclen; 1716 dp = (struct dirent *)cpos; 1717 cookiep++; 1718 ncookies--; 1719 } 1720 if (cpos >= cend || ncookies == 0) { 1721 siz = fullsiz; 1722 toff = off; 1723 goto again; 1724 } 1725 vput(vp); 1726 1727 /* 1728 * dirlen is the size of the reply, including all XDR and must 1729 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1730 * if the XDR should be included in "count", but to be safe, we do. 1731 * (Include the two booleans at the end of the reply in dirlen now.) 1732 */ 1733 if (nd->nd_flag & ND_NFSV3) { 1734 nfsrv_postopattr(nd, getret, &at); 1735 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1736 txdr_hyper(at.na_filerev, tl); 1737 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1738 } else { 1739 dirlen = 2 * NFSX_UNSIGNED; 1740 } 1741 1742 /* Loop through the records and build reply */ 1743 while (cpos < cend && ncookies > 0) { 1744 nlen = dp->d_namlen; 1745 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1746 nlen <= NFS_MAXNAMLEN) { 1747 if (nd->nd_flag & ND_NFSV3) 1748 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1749 else 1750 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 1751 if (dirlen > cnt) { 1752 eofflag = 0; 1753 break; 1754 } 1755 1756 /* 1757 * Build the directory record xdr from 1758 * the dirent entry. 1759 */ 1760 if (nd->nd_flag & ND_NFSV3) { 1761 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1762 *tl++ = newnfs_true; 1763 *tl++ = 0; 1764 } else { 1765 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1766 *tl++ = newnfs_true; 1767 } 1768 *tl = txdr_unsigned(dp->d_fileno); 1769 (void) nfsm_strtom(nd, dp->d_name, nlen); 1770 if (nd->nd_flag & ND_NFSV3) { 1771 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1772 *tl++ = 0; 1773 } else 1774 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 1775 *tl = txdr_unsigned(*cookiep); 1776 } 1777 cpos += dp->d_reclen; 1778 dp = (struct dirent *)cpos; 1779 cookiep++; 1780 ncookies--; 1781 } 1782 if (cpos < cend) 1783 eofflag = 0; 1784 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1785 *tl++ = newnfs_false; 1786 if (eofflag) 1787 *tl = newnfs_true; 1788 else 1789 *tl = newnfs_false; 1790 FREE((caddr_t)rbuf, M_TEMP); 1791 FREE((caddr_t)cookies, M_TEMP); 1792 1793out: 1794 NFSEXITCODE2(0, nd); 1795 return (0); 1796nfsmout: 1797 vput(vp); 1798 NFSEXITCODE2(error, nd); 1799 return (error); 1800} 1801 1802/* 1803 * Readdirplus for V3 and Readdir for V4. 1804 */ 1805int 1806nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 1807 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1808{ 1809 struct dirent *dp; 1810 u_int32_t *tl; 1811 int dirlen; 1812 char *cpos, *cend, *rbuf; 1813 struct vnode *nvp; 1814 fhandle_t nfh; 1815 struct nfsvattr nva, at, *nvap = &nva; 1816 struct mbuf *mb0, *mb1; 1817 struct nfsreferral *refp; 1818 int nlen, r, error = 0, getret = 1, usevget = 1; 1819 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 1820 caddr_t bpos0, bpos1; 1821 u_int64_t off, toff, verf; 1822 u_long *cookies = NULL, *cookiep; 1823 nfsattrbit_t attrbits, rderrbits, savbits; 1824 struct uio io; 1825 struct iovec iv; 1826 struct componentname cn; 1827 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 1828 struct mount *mp, *new_mp; 1829 uint64_t mounted_on_fileno; 1830 1831 if (nd->nd_repstat) { 1832 nfsrv_postopattr(nd, getret, &at); 1833 goto out; 1834 } 1835 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 1836 off = fxdr_hyper(tl); 1837 toff = off; 1838 tl += 2; 1839 verf = fxdr_hyper(tl); 1840 tl += 2; 1841 siz = fxdr_unsigned(int, *tl++); 1842 cnt = fxdr_unsigned(int, *tl); 1843 1844 /* 1845 * Use the server's maximum data transfer size as the upper bound 1846 * on reply datalen. 1847 */ 1848 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1849 cnt = NFS_SRVMAXDATA(nd); 1850 1851 /* 1852 * siz is a "hint" of how much directory information (name, fileid, 1853 * cookie) should be in the reply. At least one client "hints" 0, 1854 * so I set it to cnt for that case. I also round it up to the 1855 * next multiple of DIRBLKSIZ. 1856 */ 1857 if (siz <= 0) 1858 siz = cnt; 1859 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1860 1861 if (nd->nd_flag & ND_NFSV4) { 1862 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 1863 if (error) 1864 goto nfsmout; 1865 NFSSET_ATTRBIT(&savbits, &attrbits); 1866 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 1867 NFSZERO_ATTRBIT(&rderrbits); 1868 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 1869 } else { 1870 NFSZERO_ATTRBIT(&attrbits); 1871 } 1872 fullsiz = siz; 1873 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1874 if (!nd->nd_repstat) { 1875 if (off && verf != at.na_filerev) { 1876 /* 1877 * va_filerev is not sufficient as a cookie verifier, 1878 * since it is not supposed to change when entries are 1879 * removed/added unless that offset cookies returned to 1880 * the client are no longer valid. 1881 */ 1882#if 0 1883 if (nd->nd_flag & ND_NFSV4) { 1884 nd->nd_repstat = NFSERR_NOTSAME; 1885 } else { 1886 nd->nd_repstat = NFSERR_BAD_COOKIE; 1887 } 1888#endif 1889 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) { 1890 nd->nd_repstat = NFSERR_BAD_COOKIE; 1891 } 1892 } 1893 if (!nd->nd_repstat && vp->v_type != VDIR) 1894 nd->nd_repstat = NFSERR_NOTDIR; 1895 if (!nd->nd_repstat && cnt == 0) 1896 nd->nd_repstat = NFSERR_TOOSMALL; 1897 if (!nd->nd_repstat) 1898 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1899 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1900 NFSACCCHK_VPISLOCKED, NULL); 1901 if (nd->nd_repstat) { 1902 vput(vp); 1903 if (nd->nd_flag & ND_NFSV3) 1904 nfsrv_postopattr(nd, getret, &at); 1905 goto out; 1906 } 1907 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1908 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 1909 1910 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); 1911again: 1912 eofflag = 0; 1913 if (cookies) { 1914 free((caddr_t)cookies, M_TEMP); 1915 cookies = NULL; 1916 } 1917 1918 iv.iov_base = rbuf; 1919 iv.iov_len = siz; 1920 io.uio_iov = &iv; 1921 io.uio_iovcnt = 1; 1922 io.uio_offset = (off_t)off; 1923 io.uio_resid = siz; 1924 io.uio_segflg = UIO_SYSSPACE; 1925 io.uio_rw = UIO_READ; 1926 io.uio_td = NULL; 1927 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1928 &cookies); 1929 off = (u_int64_t)io.uio_offset; 1930 if (io.uio_resid) 1931 siz -= io.uio_resid; 1932 1933 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1); 1934 1935 if (!cookies && !nd->nd_repstat) 1936 nd->nd_repstat = NFSERR_PERM; 1937 if (!nd->nd_repstat) 1938 nd->nd_repstat = getret; 1939 if (nd->nd_repstat) { 1940 vput(vp); 1941 if (cookies) 1942 free((caddr_t)cookies, M_TEMP); 1943 free((caddr_t)rbuf, M_TEMP); 1944 if (nd->nd_flag & ND_NFSV3) 1945 nfsrv_postopattr(nd, getret, &at); 1946 goto out; 1947 } 1948 /* 1949 * If nothing read, return eof 1950 * rpc reply 1951 */ 1952 if (siz == 0) { 1953 vput(vp); 1954 if (nd->nd_flag & ND_NFSV3) 1955 nfsrv_postopattr(nd, getret, &at); 1956 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1957 txdr_hyper(at.na_filerev, tl); 1958 tl += 2; 1959 *tl++ = newnfs_false; 1960 *tl = newnfs_true; 1961 free((caddr_t)cookies, M_TEMP); 1962 free((caddr_t)rbuf, M_TEMP); 1963 goto out; 1964 } 1965 1966 /* 1967 * Check for degenerate cases of nothing useful read. 1968 * If so go try again 1969 */ 1970 cpos = rbuf; 1971 cend = rbuf + siz; 1972 dp = (struct dirent *)cpos; 1973 cookiep = cookies; 1974 1975 /* 1976 * For some reason FreeBSD's ufs_readdir() chooses to back the 1977 * directory offset up to a block boundary, so it is necessary to 1978 * skip over the records that precede the requested offset. This 1979 * requires the assumption that file offset cookies monotonically 1980 * increase. 1981 */ 1982 while (cpos < cend && ncookies > 0 && 1983 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1984 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 1985 ((nd->nd_flag & ND_NFSV4) && 1986 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 1987 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 1988 cpos += dp->d_reclen; 1989 dp = (struct dirent *)cpos; 1990 cookiep++; 1991 ncookies--; 1992 } 1993 if (cpos >= cend || ncookies == 0) { 1994 siz = fullsiz; 1995 toff = off; 1996 goto again; 1997 } 1998 1999 /* 2000 * Busy the file system so that the mount point won't go away 2001 * and, as such, VFS_VGET() can be used safely. 2002 */ 2003 mp = vp->v_mount; 2004 vfs_ref(mp); 2005 NFSVOPUNLOCK(vp, 0); 2006 nd->nd_repstat = vfs_busy(mp, 0); 2007 vfs_rel(mp); 2008 if (nd->nd_repstat != 0) { 2009 vrele(vp); 2010 free(cookies, M_TEMP); 2011 free(rbuf, M_TEMP); 2012 if (nd->nd_flag & ND_NFSV3) 2013 nfsrv_postopattr(nd, getret, &at); 2014 goto out; 2015 } 2016 2017 /* 2018 * For now ZFS requires VOP_LOOKUP as a workaround. Until ino_t is changed 2019 * to 64 bit type a ZFS filesystem with over 1 billion files in it 2020 * will suffer from 64bit -> 32bit truncation. 2021 */ 2022 if (is_zfs == 1) 2023 usevget = 0; 2024 2025 cn.cn_nameiop = LOOKUP; 2026 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2027 cn.cn_cred = nd->nd_cred; 2028 cn.cn_thread = p; 2029 2030 /* 2031 * Save this position, in case there is an error before one entry 2032 * is created. 2033 */ 2034 mb0 = nd->nd_mb; 2035 bpos0 = nd->nd_bpos; 2036 2037 /* 2038 * Fill in the first part of the reply. 2039 * dirlen is the reply length in bytes and cannot exceed cnt. 2040 * (Include the two booleans at the end of the reply in dirlen now, 2041 * so we recognize when we have exceeded cnt.) 2042 */ 2043 if (nd->nd_flag & ND_NFSV3) { 2044 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2045 nfsrv_postopattr(nd, getret, &at); 2046 } else { 2047 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2048 } 2049 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2050 txdr_hyper(at.na_filerev, tl); 2051 2052 /* 2053 * Save this position, in case there is an empty reply needed. 2054 */ 2055 mb1 = nd->nd_mb; 2056 bpos1 = nd->nd_bpos; 2057 2058 /* Loop through the records and build reply */ 2059 entrycnt = 0; 2060 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2061 nlen = dp->d_namlen; 2062 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2063 nlen <= NFS_MAXNAMLEN && 2064 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2065 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2066 || (nlen == 1 && dp->d_name[0] != '.'))) { 2067 /* 2068 * Save the current position in the reply, in case 2069 * this entry exceeds cnt. 2070 */ 2071 mb1 = nd->nd_mb; 2072 bpos1 = nd->nd_bpos; 2073 2074 /* 2075 * For readdir_and_lookup get the vnode using 2076 * the file number. 2077 */ 2078 nvp = NULL; 2079 refp = NULL; 2080 r = 0; 2081 at_root = 0; 2082 needs_unbusy = 0; 2083 new_mp = mp; 2084 mounted_on_fileno = (uint64_t)dp->d_fileno; 2085 if ((nd->nd_flag & ND_NFSV3) || 2086 NFSNONZERO_ATTRBIT(&savbits)) { 2087 if (nd->nd_flag & ND_NFSV4) 2088 refp = nfsv4root_getreferral(NULL, 2089 vp, dp->d_fileno); 2090 if (refp == NULL) { 2091 if (usevget) 2092 r = VFS_VGET(mp, dp->d_fileno, 2093 LK_SHARED, &nvp); 2094 else 2095 r = EOPNOTSUPP; 2096 if (r == EOPNOTSUPP) { 2097 usevget = 0; 2098 cn.cn_nameptr = dp->d_name; 2099 cn.cn_namelen = nlen; 2100 cn.cn_flags = ISLASTCN | 2101 NOFOLLOW | LOCKLEAF; 2102 if (nlen == 2 && 2103 dp->d_name[0] == '.' && 2104 dp->d_name[1] == '.') 2105 cn.cn_flags |= 2106 ISDOTDOT; 2107 if (NFSVOPLOCK(vp, LK_SHARED) 2108 != 0) { 2109 nd->nd_repstat = EPERM; 2110 break; 2111 } 2112 if ((vp->v_vflag & VV_ROOT) != 0 2113 && (cn.cn_flags & ISDOTDOT) 2114 != 0) { 2115 vref(vp); 2116 nvp = vp; 2117 r = 0; 2118 } else { 2119 r = VOP_LOOKUP(vp, &nvp, 2120 &cn); 2121 if (vp != nvp) 2122 NFSVOPUNLOCK(vp, 2123 0); 2124 } 2125 } 2126 2127 /* 2128 * For NFSv4, check to see if nvp is 2129 * a mount point and get the mount 2130 * point vnode, as required. 2131 */ 2132 if (r == 0 && 2133 nfsrv_enable_crossmntpt != 0 && 2134 (nd->nd_flag & ND_NFSV4) != 0 && 2135 nvp->v_type == VDIR && 2136 nvp->v_mountedhere != NULL) { 2137 new_mp = nvp->v_mountedhere; 2138 r = vfs_busy(new_mp, 0); 2139 vput(nvp); 2140 nvp = NULL; 2141 if (r == 0) { 2142 r = VFS_ROOT(new_mp, 2143 LK_SHARED, &nvp); 2144 needs_unbusy = 1; 2145 if (r == 0) 2146 at_root = 1; 2147 } 2148 } 2149 } 2150 if (!r) { 2151 if (refp == NULL && 2152 ((nd->nd_flag & ND_NFSV3) || 2153 NFSNONZERO_ATTRBIT(&attrbits))) { 2154 r = nfsvno_getfh(nvp, &nfh, p); 2155 if (!r) 2156 r = nfsvno_getattr(nvp, nvap, 2157 nd->nd_cred, p, 1); 2158 if (r == 0 && is_zfs == 1 && 2159 nfsrv_enable_crossmntpt != 0 && 2160 (nd->nd_flag & ND_NFSV4) != 0 && 2161 nvp->v_type == VDIR && 2162 vp->v_mount != nvp->v_mount) { 2163 /* 2164 * For a ZFS snapshot, there is a 2165 * pseudo mount that does not set 2166 * v_mountedhere, so it needs to 2167 * be detected via a different 2168 * mount structure. 2169 */ 2170 at_root = 1; 2171 if (new_mp == mp) 2172 new_mp = nvp->v_mount; 2173 } 2174 } 2175 } else { 2176 nvp = NULL; 2177 } 2178 if (r) { 2179 if (!NFSISSET_ATTRBIT(&attrbits, 2180 NFSATTRBIT_RDATTRERROR)) { 2181 if (nvp != NULL) 2182 vput(nvp); 2183 if (needs_unbusy != 0) 2184 vfs_unbusy(new_mp); 2185 nd->nd_repstat = r; 2186 break; 2187 } 2188 } 2189 } 2190 2191 /* 2192 * Build the directory record xdr 2193 */ 2194 if (nd->nd_flag & ND_NFSV3) { 2195 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2196 *tl++ = newnfs_true; 2197 *tl++ = 0; 2198 *tl = txdr_unsigned(dp->d_fileno); 2199 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2200 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2201 *tl++ = 0; 2202 *tl = txdr_unsigned(*cookiep); 2203 nfsrv_postopattr(nd, 0, nvap); 2204 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2205 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2206 if (nvp != NULL) 2207 vput(nvp); 2208 } else { 2209 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2210 *tl++ = newnfs_true; 2211 *tl++ = 0; 2212 *tl = txdr_unsigned(*cookiep); 2213 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2214 if (nvp != NULL) { 2215 supports_nfsv4acls = 2216 nfs_supportsnfsv4acls(nvp); 2217 NFSVOPUNLOCK(nvp, 0); 2218 } else 2219 supports_nfsv4acls = 0; 2220 if (refp != NULL) { 2221 dirlen += nfsrv_putreferralattr(nd, 2222 &savbits, refp, 0, 2223 &nd->nd_repstat); 2224 if (nd->nd_repstat) { 2225 if (nvp != NULL) 2226 vrele(nvp); 2227 if (needs_unbusy != 0) 2228 vfs_unbusy(new_mp); 2229 break; 2230 } 2231 } else if (r) { 2232 dirlen += nfsvno_fillattr(nd, new_mp, 2233 nvp, nvap, &nfh, r, &rderrbits, 2234 nd->nd_cred, p, isdgram, 0, 2235 supports_nfsv4acls, at_root, 2236 mounted_on_fileno); 2237 } else { 2238 dirlen += nfsvno_fillattr(nd, new_mp, 2239 nvp, nvap, &nfh, r, &attrbits, 2240 nd->nd_cred, p, isdgram, 0, 2241 supports_nfsv4acls, at_root, 2242 mounted_on_fileno); 2243 } 2244 if (nvp != NULL) 2245 vrele(nvp); 2246 dirlen += (3 * NFSX_UNSIGNED); 2247 } 2248 if (needs_unbusy != 0) 2249 vfs_unbusy(new_mp); 2250 if (dirlen <= cnt) 2251 entrycnt++; 2252 } 2253 cpos += dp->d_reclen; 2254 dp = (struct dirent *)cpos; 2255 cookiep++; 2256 ncookies--; 2257 } 2258 vrele(vp); 2259 vfs_unbusy(mp); 2260 2261 /* 2262 * If dirlen > cnt, we must strip off the last entry. If that 2263 * results in an empty reply, report NFSERR_TOOSMALL. 2264 */ 2265 if (dirlen > cnt || nd->nd_repstat) { 2266 if (!nd->nd_repstat && entrycnt == 0) 2267 nd->nd_repstat = NFSERR_TOOSMALL; 2268 if (nd->nd_repstat) { 2269 newnfs_trimtrailing(nd, mb0, bpos0); 2270 if (nd->nd_flag & ND_NFSV3) 2271 nfsrv_postopattr(nd, getret, &at); 2272 } else 2273 newnfs_trimtrailing(nd, mb1, bpos1); 2274 eofflag = 0; 2275 } else if (cpos < cend) 2276 eofflag = 0; 2277 if (!nd->nd_repstat) { 2278 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2279 *tl++ = newnfs_false; 2280 if (eofflag) 2281 *tl = newnfs_true; 2282 else 2283 *tl = newnfs_false; 2284 } 2285 FREE((caddr_t)cookies, M_TEMP); 2286 FREE((caddr_t)rbuf, M_TEMP); 2287 2288out: 2289 NFSEXITCODE2(0, nd); 2290 return (0); 2291nfsmout: 2292 vput(vp); 2293 NFSEXITCODE2(error, nd); 2294 return (error); 2295} 2296 2297/* 2298 * Get the settable attributes out of the mbuf list. 2299 * (Return 0 or EBADRPC) 2300 */ 2301int 2302nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2303 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2304{ 2305 u_int32_t *tl; 2306 struct nfsv2_sattr *sp; 2307 int error = 0, toclient = 0; 2308 2309 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2310 case ND_NFSV2: 2311 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2312 /* 2313 * Some old clients didn't fill in the high order 16bits. 2314 * --> check the low order 2 bytes for 0xffff 2315 */ 2316 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2317 nvap->na_mode = nfstov_mode(sp->sa_mode); 2318 if (sp->sa_uid != newnfs_xdrneg1) 2319 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2320 if (sp->sa_gid != newnfs_xdrneg1) 2321 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2322 if (sp->sa_size != newnfs_xdrneg1) 2323 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2324 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2325#ifdef notyet 2326 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2327#else 2328 nvap->na_atime.tv_sec = 2329 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2330 nvap->na_atime.tv_nsec = 0; 2331#endif 2332 } 2333 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2334 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2335 break; 2336 case ND_NFSV3: 2337 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2338 if (*tl == newnfs_true) { 2339 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2340 nvap->na_mode = nfstov_mode(*tl); 2341 } 2342 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2343 if (*tl == newnfs_true) { 2344 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2345 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2346 } 2347 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2348 if (*tl == newnfs_true) { 2349 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2350 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2351 } 2352 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2353 if (*tl == newnfs_true) { 2354 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2355 nvap->na_size = fxdr_hyper(tl); 2356 } 2357 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2358 switch (fxdr_unsigned(int, *tl)) { 2359 case NFSV3SATTRTIME_TOCLIENT: 2360 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2361 fxdr_nfsv3time(tl, &nvap->na_atime); 2362 toclient = 1; 2363 break; 2364 case NFSV3SATTRTIME_TOSERVER: 2365 vfs_timestamp(&nvap->na_atime); 2366 nvap->na_vaflags |= VA_UTIMES_NULL; 2367 break; 2368 }; 2369 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2370 switch (fxdr_unsigned(int, *tl)) { 2371 case NFSV3SATTRTIME_TOCLIENT: 2372 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2373 fxdr_nfsv3time(tl, &nvap->na_mtime); 2374 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2375 break; 2376 case NFSV3SATTRTIME_TOSERVER: 2377 vfs_timestamp(&nvap->na_mtime); 2378 if (!toclient) 2379 nvap->na_vaflags |= VA_UTIMES_NULL; 2380 break; 2381 }; 2382 break; 2383 case ND_NFSV4: 2384 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p); 2385 }; 2386nfsmout: 2387 NFSEXITCODE2(error, nd); 2388 return (error); 2389} 2390 2391/* 2392 * Handle the setable attributes for V4. 2393 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2394 */ 2395int 2396nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap, 2397 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2398{ 2399 u_int32_t *tl; 2400 int attrsum = 0; 2401 int i, j; 2402 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2403 int toclient = 0; 2404 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2405 uid_t uid; 2406 gid_t gid; 2407 2408 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2409 if (error) 2410 goto nfsmout; 2411 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2412 attrsize = fxdr_unsigned(int, *tl); 2413 2414 /* 2415 * Loop around getting the setable attributes. If an unsupported 2416 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2417 */ 2418 if (retnotsup) { 2419 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2420 bitpos = NFSATTRBIT_MAX; 2421 } else { 2422 bitpos = 0; 2423 } 2424 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2425 if (attrsum > attrsize) { 2426 error = NFSERR_BADXDR; 2427 goto nfsmout; 2428 } 2429 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2430 switch (bitpos) { 2431 case NFSATTRBIT_SIZE: 2432 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2433 nvap->na_size = fxdr_hyper(tl); 2434 attrsum += NFSX_HYPER; 2435 break; 2436 case NFSATTRBIT_ACL: 2437 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2438 p); 2439 if (error) 2440 goto nfsmout; 2441 if (aceerr && !nd->nd_repstat) 2442 nd->nd_repstat = aceerr; 2443 attrsum += aclsize; 2444 break; 2445 case NFSATTRBIT_ARCHIVE: 2446 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2447 if (!nd->nd_repstat) 2448 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2449 attrsum += NFSX_UNSIGNED; 2450 break; 2451 case NFSATTRBIT_HIDDEN: 2452 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2453 if (!nd->nd_repstat) 2454 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2455 attrsum += NFSX_UNSIGNED; 2456 break; 2457 case NFSATTRBIT_MIMETYPE: 2458 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2459 i = fxdr_unsigned(int, *tl); 2460 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2461 if (error) 2462 goto nfsmout; 2463 if (!nd->nd_repstat) 2464 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2465 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2466 break; 2467 case NFSATTRBIT_MODE: 2468 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2469 nvap->na_mode = nfstov_mode(*tl); 2470 attrsum += NFSX_UNSIGNED; 2471 break; 2472 case NFSATTRBIT_OWNER: 2473 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2474 j = fxdr_unsigned(int, *tl); 2475 if (j < 0) { 2476 error = NFSERR_BADXDR; 2477 goto nfsmout; 2478 } 2479 if (j > NFSV4_SMALLSTR) 2480 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2481 else 2482 cp = namestr; 2483 error = nfsrv_mtostr(nd, cp, j); 2484 if (error) { 2485 if (j > NFSV4_SMALLSTR) 2486 free(cp, M_NFSSTRING); 2487 goto nfsmout; 2488 } 2489 if (!nd->nd_repstat) { 2490 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2491 p); 2492 if (!nd->nd_repstat) 2493 nvap->na_uid = uid; 2494 } 2495 if (j > NFSV4_SMALLSTR) 2496 free(cp, M_NFSSTRING); 2497 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2498 break; 2499 case NFSATTRBIT_OWNERGROUP: 2500 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2501 j = fxdr_unsigned(int, *tl); 2502 if (j < 0) { 2503 error = NFSERR_BADXDR; 2504 goto nfsmout; 2505 } 2506 if (j > NFSV4_SMALLSTR) 2507 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2508 else 2509 cp = namestr; 2510 error = nfsrv_mtostr(nd, cp, j); 2511 if (error) { 2512 if (j > NFSV4_SMALLSTR) 2513 free(cp, M_NFSSTRING); 2514 goto nfsmout; 2515 } 2516 if (!nd->nd_repstat) { 2517 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2518 p); 2519 if (!nd->nd_repstat) 2520 nvap->na_gid = gid; 2521 } 2522 if (j > NFSV4_SMALLSTR) 2523 free(cp, M_NFSSTRING); 2524 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2525 break; 2526 case NFSATTRBIT_SYSTEM: 2527 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2528 if (!nd->nd_repstat) 2529 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2530 attrsum += NFSX_UNSIGNED; 2531 break; 2532 case NFSATTRBIT_TIMEACCESSSET: 2533 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2534 attrsum += NFSX_UNSIGNED; 2535 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2536 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2537 fxdr_nfsv4time(tl, &nvap->na_atime); 2538 toclient = 1; 2539 attrsum += NFSX_V4TIME; 2540 } else { 2541 vfs_timestamp(&nvap->na_atime); 2542 nvap->na_vaflags |= VA_UTIMES_NULL; 2543 } 2544 break; 2545 case NFSATTRBIT_TIMEBACKUP: 2546 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2547 if (!nd->nd_repstat) 2548 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2549 attrsum += NFSX_V4TIME; 2550 break; 2551 case NFSATTRBIT_TIMECREATE: 2552 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2553 if (!nd->nd_repstat) 2554 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2555 attrsum += NFSX_V4TIME; 2556 break; 2557 case NFSATTRBIT_TIMEMODIFYSET: 2558 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2559 attrsum += NFSX_UNSIGNED; 2560 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2561 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2562 fxdr_nfsv4time(tl, &nvap->na_mtime); 2563 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2564 attrsum += NFSX_V4TIME; 2565 } else { 2566 vfs_timestamp(&nvap->na_mtime); 2567 if (!toclient) 2568 nvap->na_vaflags |= VA_UTIMES_NULL; 2569 } 2570 break; 2571 default: 2572 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2573 /* 2574 * set bitpos so we drop out of the loop. 2575 */ 2576 bitpos = NFSATTRBIT_MAX; 2577 break; 2578 }; 2579 } 2580 2581 /* 2582 * some clients pad the attrlist, so we need to skip over the 2583 * padding. 2584 */ 2585 if (attrsum > attrsize) { 2586 error = NFSERR_BADXDR; 2587 } else { 2588 attrsize = NFSM_RNDUP(attrsize); 2589 if (attrsum < attrsize) 2590 error = nfsm_advance(nd, attrsize - attrsum, -1); 2591 } 2592nfsmout: 2593 NFSEXITCODE2(error, nd); 2594 return (error); 2595} 2596 2597/* 2598 * Check/setup export credentials. 2599 */ 2600int 2601nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2602 struct ucred *credanon) 2603{ 2604 int error = 0; 2605 2606 /* 2607 * Check/setup credentials. 2608 */ 2609 if (nd->nd_flag & ND_GSS) 2610 exp->nes_exflag &= ~MNT_EXPORTANON; 2611 2612 /* 2613 * Check to see if the operation is allowed for this security flavor. 2614 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2615 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2616 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2617 */ 2618 if (nfsvno_testexp(nd, exp) && 2619 nd->nd_procnum != NFSV4OP_SECINFO && 2620 nd->nd_procnum != NFSPROC_FSINFO) { 2621 if (nd->nd_flag & ND_NFSV4) 2622 error = NFSERR_WRONGSEC; 2623 else 2624 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2625 goto out; 2626 } 2627 2628 /* 2629 * Check to see if the file system is exported V4 only. 2630 */ 2631 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2632 error = NFSERR_PROGNOTV4; 2633 goto out; 2634 } 2635 2636 /* 2637 * Now, map the user credentials. 2638 * (Note that ND_AUTHNONE will only be set for an NFSv3 2639 * Fsinfo RPC. If set for anything else, this code might need 2640 * to change.) 2641 */ 2642 if (NFSVNO_EXPORTED(exp)) { 2643 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2644 NFSVNO_EXPORTANON(exp) || 2645 (nd->nd_flag & ND_AUTHNONE) != 0) { 2646 nd->nd_cred->cr_uid = credanon->cr_uid; 2647 nd->nd_cred->cr_gid = credanon->cr_gid; 2648 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2649 credanon->cr_groups); 2650 } else if ((nd->nd_flag & ND_GSS) == 0) { 2651 /* 2652 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2653 * if there is a replacement credential with a group 2654 * list set up by "nfsuserd -manage-gids". 2655 * If there is no replacement, nfsrv_getgrpscred() 2656 * simply returns its argument. 2657 */ 2658 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2659 } 2660 } 2661 2662out: 2663 NFSEXITCODE2(error, nd); 2664 return (error); 2665} 2666 2667/* 2668 * Check exports. 2669 */ 2670int 2671nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2672 struct ucred **credp) 2673{ 2674 int i, error, *secflavors; 2675 2676 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2677 &exp->nes_numsecflavor, &secflavors); 2678 if (error) { 2679 if (nfs_rootfhset) { 2680 exp->nes_exflag = 0; 2681 exp->nes_numsecflavor = 0; 2682 error = 0; 2683 } 2684 } else { 2685 /* Copy the security flavors. */ 2686 for (i = 0; i < exp->nes_numsecflavor; i++) 2687 exp->nes_secflavors[i] = secflavors[i]; 2688 } 2689 NFSEXITCODE(error); 2690 return (error); 2691} 2692 2693/* 2694 * Get a vnode for a file handle and export stuff. 2695 */ 2696int 2697nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2698 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2699 struct ucred **credp) 2700{ 2701 int i, error, *secflavors; 2702 2703 *credp = NULL; 2704 exp->nes_numsecflavor = 0; 2705 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2706 if (error != 0) 2707 /* Make sure the server replies ESTALE to the client. */ 2708 error = ESTALE; 2709 if (nam && !error) { 2710 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2711 &exp->nes_numsecflavor, &secflavors); 2712 if (error) { 2713 if (nfs_rootfhset) { 2714 exp->nes_exflag = 0; 2715 exp->nes_numsecflavor = 0; 2716 error = 0; 2717 } else { 2718 vput(*vpp); 2719 } 2720 } else { 2721 /* Copy the security flavors. */ 2722 for (i = 0; i < exp->nes_numsecflavor; i++) 2723 exp->nes_secflavors[i] = secflavors[i]; 2724 } 2725 } 2726 NFSEXITCODE(error); 2727 return (error); 2728} 2729 2730/* 2731 * nfsd_fhtovp() - convert a fh to a vnode ptr 2732 * - look up fsid in mount list (if not found ret error) 2733 * - get vp and export rights by calling nfsvno_fhtovp() 2734 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2735 * for AUTH_SYS 2736 * - if mpp != NULL, return the mount point so that it can 2737 * be used for vn_finished_write() by the caller 2738 */ 2739void 2740nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 2741 struct vnode **vpp, struct nfsexstuff *exp, 2742 struct mount **mpp, int startwrite, struct thread *p) 2743{ 2744 struct mount *mp; 2745 struct ucred *credanon; 2746 fhandle_t *fhp; 2747 2748 fhp = (fhandle_t *)nfp->nfsrvfh_data; 2749 /* 2750 * Check for the special case of the nfsv4root_fh. 2751 */ 2752 mp = vfs_busyfs(&fhp->fh_fsid); 2753 if (mpp != NULL) 2754 *mpp = mp; 2755 if (mp == NULL) { 2756 *vpp = NULL; 2757 nd->nd_repstat = ESTALE; 2758 goto out; 2759 } 2760 2761 if (startwrite) { 2762 vn_start_write(NULL, mpp, V_WAIT); 2763 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 2764 lktype = LK_EXCLUSIVE; 2765 } 2766 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 2767 &credanon); 2768 vfs_unbusy(mp); 2769 2770 /* 2771 * For NFSv4 without a pseudo root fs, unexported file handles 2772 * can be returned, so that Lookup works everywhere. 2773 */ 2774 if (!nd->nd_repstat && exp->nes_exflag == 0 && 2775 !(nd->nd_flag & ND_NFSV4)) { 2776 vput(*vpp); 2777 nd->nd_repstat = EACCES; 2778 } 2779 2780 /* 2781 * Personally, I've never seen any point in requiring a 2782 * reserved port#, since only in the rare case where the 2783 * clients are all boxes with secure system priviledges, 2784 * does it provide any enhanced security, but... some people 2785 * believe it to be useful and keep putting this code back in. 2786 * (There is also some "security checker" out there that 2787 * complains if the nfs server doesn't enforce this.) 2788 * However, note the following: 2789 * RFC3530 (NFSv4) specifies that a reserved port# not be 2790 * required. 2791 * RFC2623 recommends that, if a reserved port# is checked for, 2792 * that there be a way to turn that off--> ifdef'd. 2793 */ 2794#ifdef NFS_REQRSVPORT 2795 if (!nd->nd_repstat) { 2796 struct sockaddr_in *saddr; 2797 struct sockaddr_in6 *saddr6; 2798 2799 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 2800 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 2801 if (!(nd->nd_flag & ND_NFSV4) && 2802 ((saddr->sin_family == AF_INET && 2803 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 2804 (saddr6->sin6_family == AF_INET6 && 2805 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 2806 vput(*vpp); 2807 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2808 } 2809 } 2810#endif /* NFS_REQRSVPORT */ 2811 2812 /* 2813 * Check/setup credentials. 2814 */ 2815 if (!nd->nd_repstat) { 2816 nd->nd_saveduid = nd->nd_cred->cr_uid; 2817 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 2818 if (nd->nd_repstat) 2819 vput(*vpp); 2820 } 2821 if (credanon != NULL) 2822 crfree(credanon); 2823 if (nd->nd_repstat) { 2824 if (startwrite) 2825 vn_finished_write(mp); 2826 *vpp = NULL; 2827 if (mpp != NULL) 2828 *mpp = NULL; 2829 } 2830 2831out: 2832 NFSEXITCODE2(0, nd); 2833} 2834 2835/* 2836 * glue for fp. 2837 */ 2838static int 2839fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 2840{ 2841 struct filedesc *fdp; 2842 struct file *fp; 2843 int error = 0; 2844 2845 fdp = p->td_proc->p_fd; 2846 if (fd < 0 || fd >= fdp->fd_nfiles || 2847 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 2848 error = EBADF; 2849 goto out; 2850 } 2851 *fpp = fp; 2852 2853out: 2854 NFSEXITCODE(error); 2855 return (error); 2856} 2857 2858/* 2859 * Called from nfssvc() to update the exports list. Just call 2860 * vfs_export(). This has to be done, since the v4 root fake fs isn't 2861 * in the mount list. 2862 */ 2863int 2864nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 2865{ 2866 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 2867 int error = 0; 2868 struct nameidata nd; 2869 fhandle_t fh; 2870 2871 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 2872 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 2873 nfs_rootfhset = 0; 2874 else if (error == 0) { 2875 if (nfsexargp->fspec == NULL) { 2876 error = EPERM; 2877 goto out; 2878 } 2879 /* 2880 * If fspec != NULL, this is the v4root path. 2881 */ 2882 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 2883 nfsexargp->fspec, p); 2884 if ((error = namei(&nd)) != 0) 2885 goto out; 2886 error = nfsvno_getfh(nd.ni_vp, &fh, p); 2887 vrele(nd.ni_vp); 2888 if (!error) { 2889 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 2890 NFSBCOPY((caddr_t)&fh, 2891 nfs_rootfh.nfsrvfh_data, 2892 sizeof (fhandle_t)); 2893 nfs_rootfhset = 1; 2894 } 2895 } 2896 2897out: 2898 NFSEXITCODE(error); 2899 return (error); 2900} 2901 2902/* 2903 * This function needs to test to see if the system is near its limit 2904 * for memory allocation via malloc() or mget() and return True iff 2905 * either of these resources are near their limit. 2906 * XXX (For now, this is just a stub.) 2907 */ 2908int nfsrv_testmalloclimit = 0; 2909int 2910nfsrv_mallocmget_limit(void) 2911{ 2912 static int printmesg = 0; 2913 static int testval = 1; 2914 2915 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 2916 if ((printmesg++ % 100) == 0) 2917 printf("nfsd: malloc/mget near limit\n"); 2918 return (1); 2919 } 2920 return (0); 2921} 2922 2923/* 2924 * BSD specific initialization of a mount point. 2925 */ 2926void 2927nfsd_mntinit(void) 2928{ 2929 static int inited = 0; 2930 2931 if (inited) 2932 return; 2933 inited = 1; 2934 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 2935 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 2936 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 2937 nfsv4root_mnt.mnt_export = NULL; 2938 TAILQ_INIT(&nfsv4root_opt); 2939 TAILQ_INIT(&nfsv4root_newopt); 2940 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 2941 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 2942 nfsv4root_mnt.mnt_nvnodelistsize = 0; 2943 nfsv4root_mnt.mnt_activevnodelistsize = 0; 2944} 2945 2946/* 2947 * Get a vnode for a file handle, without checking exports, etc. 2948 */ 2949struct vnode * 2950nfsvno_getvp(fhandle_t *fhp) 2951{ 2952 struct mount *mp; 2953 struct vnode *vp; 2954 int error; 2955 2956 mp = vfs_busyfs(&fhp->fh_fsid); 2957 if (mp == NULL) 2958 return (NULL); 2959 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 2960 vfs_unbusy(mp); 2961 if (error) 2962 return (NULL); 2963 return (vp); 2964} 2965 2966/* 2967 * Do a local VOP_ADVLOCK(). 2968 */ 2969int 2970nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 2971 u_int64_t end, struct thread *td) 2972{ 2973 int error = 0; 2974 struct flock fl; 2975 u_int64_t tlen; 2976 2977 if (nfsrv_dolocallocks == 0) 2978 goto out; 2979 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 2980 2981 fl.l_whence = SEEK_SET; 2982 fl.l_type = ftype; 2983 fl.l_start = (off_t)first; 2984 if (end == NFS64BITSSET) { 2985 fl.l_len = 0; 2986 } else { 2987 tlen = end - first; 2988 fl.l_len = (off_t)tlen; 2989 } 2990 /* 2991 * For FreeBSD8, the l_pid and l_sysid must be set to the same 2992 * values for all calls, so that all locks will be held by the 2993 * nfsd server. (The nfsd server handles conflicts between the 2994 * various clients.) 2995 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 2996 * bytes, so it can't be put in l_sysid. 2997 */ 2998 if (nfsv4_sysid == 0) 2999 nfsv4_sysid = nlm_acquire_next_sysid(); 3000 fl.l_pid = (pid_t)0; 3001 fl.l_sysid = (int)nfsv4_sysid; 3002 3003 if (ftype == F_UNLCK) 3004 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3005 (F_POSIX | F_REMOTE)); 3006 else 3007 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3008 (F_POSIX | F_REMOTE)); 3009 3010out: 3011 NFSEXITCODE(error); 3012 return (error); 3013} 3014 3015/* 3016 * Check the nfsv4 root exports. 3017 */ 3018int 3019nfsvno_v4rootexport(struct nfsrv_descript *nd) 3020{ 3021 struct ucred *credanon; 3022 int exflags, error = 0, numsecflavor, *secflavors, i; 3023 3024 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3025 &credanon, &numsecflavor, &secflavors); 3026 if (error) { 3027 error = NFSERR_PROGUNAVAIL; 3028 goto out; 3029 } 3030 if (credanon != NULL) 3031 crfree(credanon); 3032 for (i = 0; i < numsecflavor; i++) { 3033 if (secflavors[i] == AUTH_SYS) 3034 nd->nd_flag |= ND_EXAUTHSYS; 3035 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3036 nd->nd_flag |= ND_EXGSS; 3037 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3038 nd->nd_flag |= ND_EXGSSINTEGRITY; 3039 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3040 nd->nd_flag |= ND_EXGSSPRIVACY; 3041 } 3042 3043out: 3044 NFSEXITCODE(error); 3045 return (error); 3046} 3047 3048/* 3049 * Nfs server psuedo system call for the nfsd's 3050 */ 3051/* 3052 * MPSAFE 3053 */ 3054static int 3055nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3056{ 3057 struct file *fp; 3058 struct nfsd_addsock_args sockarg; 3059 struct nfsd_nfsd_args nfsdarg; 3060 cap_rights_t rights; 3061 int error; 3062 3063 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3064 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3065 if (error) 3066 goto out; 3067 /* 3068 * Since we don't know what rights might be required, 3069 * pretend that we need them all. It is better to be too 3070 * careful than too reckless. 3071 */ 3072 error = fget(td, sockarg.sock, 3073 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3074 if (error != 0) 3075 goto out; 3076 if (fp->f_type != DTYPE_SOCKET) { 3077 fdrop(fp, td); 3078 error = EPERM; 3079 goto out; 3080 } 3081 error = nfsrvd_addsock(fp); 3082 fdrop(fp, td); 3083 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3084 if (uap->argp == NULL) { 3085 error = EINVAL; 3086 goto out; 3087 } 3088 error = copyin(uap->argp, (caddr_t)&nfsdarg, 3089 sizeof (nfsdarg)); 3090 if (error) 3091 goto out; 3092 error = nfsrvd_nfsd(td, &nfsdarg); 3093 } else { 3094 error = nfssvc_srvcall(td, uap, td->td_ucred); 3095 } 3096 3097out: 3098 NFSEXITCODE(error); 3099 return (error); 3100} 3101 3102static int 3103nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3104{ 3105 struct nfsex_args export; 3106 struct file *fp = NULL; 3107 int stablefd, len; 3108 struct nfsd_clid adminrevoke; 3109 struct nfsd_dumplist dumplist; 3110 struct nfsd_dumpclients *dumpclients; 3111 struct nfsd_dumplocklist dumplocklist; 3112 struct nfsd_dumplocks *dumplocks; 3113 struct nameidata nd; 3114 vnode_t vp; 3115 int error = EINVAL, igotlock; 3116 struct proc *procp; 3117 static int suspend_nfsd = 0; 3118 3119 if (uap->flag & NFSSVC_PUBLICFH) { 3120 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3121 sizeof (fhandle_t)); 3122 error = copyin(uap->argp, 3123 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3124 if (!error) 3125 nfs_pubfhset = 1; 3126 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3127 error = copyin(uap->argp,(caddr_t)&export, 3128 sizeof (struct nfsex_args)); 3129 if (!error) 3130 error = nfsrv_v4rootexport(&export, cred, p); 3131 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3132 nfs_pubfhset = 0; 3133 error = 0; 3134 } else if (uap->flag & NFSSVC_STABLERESTART) { 3135 error = copyin(uap->argp, (caddr_t)&stablefd, 3136 sizeof (int)); 3137 if (!error) 3138 error = fp_getfvp(p, stablefd, &fp, &vp); 3139 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3140 error = EBADF; 3141 if (!error && newnfs_numnfsd != 0) 3142 error = EPERM; 3143 if (!error) { 3144 nfsrv_stablefirst.nsf_fp = fp; 3145 nfsrv_setupstable(p); 3146 } 3147 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3148 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3149 sizeof (struct nfsd_clid)); 3150 if (!error) 3151 error = nfsrv_adminrevoke(&adminrevoke, p); 3152 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3153 error = copyin(uap->argp, (caddr_t)&dumplist, 3154 sizeof (struct nfsd_dumplist)); 3155 if (!error && (dumplist.ndl_size < 1 || 3156 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3157 error = EPERM; 3158 if (!error) { 3159 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3160 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3161 M_TEMP, M_WAITOK); 3162 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3163 error = copyout(dumpclients, 3164 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3165 free((caddr_t)dumpclients, M_TEMP); 3166 } 3167 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3168 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3169 sizeof (struct nfsd_dumplocklist)); 3170 if (!error && (dumplocklist.ndllck_size < 1 || 3171 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3172 error = EPERM; 3173 if (!error) 3174 error = nfsrv_lookupfilename(&nd, 3175 dumplocklist.ndllck_fname, p); 3176 if (!error) { 3177 len = sizeof (struct nfsd_dumplocks) * 3178 dumplocklist.ndllck_size; 3179 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3180 M_TEMP, M_WAITOK); 3181 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3182 dumplocklist.ndllck_size, p); 3183 vput(nd.ni_vp); 3184 error = copyout(dumplocks, 3185 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3186 free((caddr_t)dumplocks, M_TEMP); 3187 } 3188 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3189 procp = p->td_proc; 3190 PROC_LOCK(procp); 3191 nfsd_master_pid = procp->p_pid; 3192 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3193 nfsd_master_start = procp->p_stats->p_start; 3194 nfsd_master_proc = procp; 3195 PROC_UNLOCK(procp); 3196 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3197 NFSLOCKV4ROOTMUTEX(); 3198 if (suspend_nfsd == 0) { 3199 /* Lock out all nfsd threads */ 3200 do { 3201 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3202 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3203 } while (igotlock == 0 && suspend_nfsd == 0); 3204 suspend_nfsd = 1; 3205 } 3206 NFSUNLOCKV4ROOTMUTEX(); 3207 error = 0; 3208 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3209 NFSLOCKV4ROOTMUTEX(); 3210 if (suspend_nfsd != 0) { 3211 nfsv4_unlock(&nfsd_suspend_lock, 0); 3212 suspend_nfsd = 0; 3213 } 3214 NFSUNLOCKV4ROOTMUTEX(); 3215 error = 0; 3216 } 3217 3218 NFSEXITCODE(error); 3219 return (error); 3220} 3221 3222/* 3223 * Check exports. 3224 * Returns 0 if ok, 1 otherwise. 3225 */ 3226int 3227nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3228{ 3229 int i; 3230 3231 /* 3232 * This seems odd, but allow the case where the security flavor 3233 * list is empty. This happens when NFSv4 is traversing non-exported 3234 * file systems. Exported file systems should always have a non-empty 3235 * security flavor list. 3236 */ 3237 if (exp->nes_numsecflavor == 0) 3238 return (0); 3239 3240 for (i = 0; i < exp->nes_numsecflavor; i++) { 3241 /* 3242 * The tests for privacy and integrity must be first, 3243 * since ND_GSS is set for everything but AUTH_SYS. 3244 */ 3245 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3246 (nd->nd_flag & ND_GSSPRIVACY)) 3247 return (0); 3248 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3249 (nd->nd_flag & ND_GSSINTEGRITY)) 3250 return (0); 3251 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3252 (nd->nd_flag & ND_GSS)) 3253 return (0); 3254 if (exp->nes_secflavors[i] == AUTH_SYS && 3255 (nd->nd_flag & ND_GSS) == 0) 3256 return (0); 3257 } 3258 return (1); 3259} 3260 3261/* 3262 * Calculate a hash value for the fid in a file handle. 3263 */ 3264uint32_t 3265nfsrv_hashfh(fhandle_t *fhp) 3266{ 3267 uint32_t hashval; 3268 3269 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3270 return (hashval); 3271} 3272 3273/* 3274 * Calculate a hash value for the sessionid. 3275 */ 3276uint32_t 3277nfsrv_hashsessionid(uint8_t *sessionid) 3278{ 3279 uint32_t hashval; 3280 3281 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3282 return (hashval); 3283} 3284 3285/* 3286 * Signal the userland master nfsd to backup the stable restart file. 3287 */ 3288void 3289nfsrv_backupstable(void) 3290{ 3291 struct proc *procp; 3292 3293 if (nfsd_master_proc != NULL) { 3294 procp = pfind(nfsd_master_pid); 3295 /* Try to make sure it is the correct process. */ 3296 if (procp == nfsd_master_proc && 3297 procp->p_stats->p_start.tv_sec == 3298 nfsd_master_start.tv_sec && 3299 procp->p_stats->p_start.tv_usec == 3300 nfsd_master_start.tv_usec && 3301 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3302 kern_psignal(procp, SIGUSR2); 3303 else 3304 nfsd_master_proc = NULL; 3305 3306 if (procp != NULL) 3307 PROC_UNLOCK(procp); 3308 } 3309} 3310 3311extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 3312 3313/* 3314 * Called once to initialize data structures... 3315 */ 3316static int 3317nfsd_modevent(module_t mod, int type, void *data) 3318{ 3319 int error = 0, i; 3320 static int loaded = 0; 3321 3322 switch (type) { 3323 case MOD_LOAD: 3324 if (loaded) 3325 goto out; 3326 newnfs_portinit(); 3327 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3328 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 3329 MTX_DEF); 3330 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 3331 MTX_DEF); 3332 } 3333 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 3334 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 3335 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 3336 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 3337 nfsrvd_initcache(); 3338 nfsd_init(); 3339 NFSD_LOCK(); 3340 nfsrvd_init(0); 3341 NFSD_UNLOCK(); 3342 nfsd_mntinit(); 3343#ifdef VV_DISABLEDELEG 3344 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 3345 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 3346#endif 3347 nfsd_call_servertimer = nfsrv_servertimer; 3348 nfsd_call_nfsd = nfssvc_nfsd; 3349 loaded = 1; 3350 break; 3351 3352 case MOD_UNLOAD: 3353 if (newnfs_numnfsd != 0) { 3354 error = EBUSY; 3355 break; 3356 } 3357 3358#ifdef VV_DISABLEDELEG 3359 vn_deleg_ops.vndeleg_recall = NULL; 3360 vn_deleg_ops.vndeleg_disable = NULL; 3361#endif 3362 nfsd_call_servertimer = NULL; 3363 nfsd_call_nfsd = NULL; 3364 3365 /* Clean out all NFSv4 state. */ 3366 nfsrv_throwawayallstate(curthread); 3367 3368 /* Clean the NFS server reply cache */ 3369 nfsrvd_cleancache(); 3370 3371 /* Free up the krpc server pool. */ 3372 if (nfsrvd_pool != NULL) 3373 svcpool_destroy(nfsrvd_pool); 3374 3375 /* and get rid of the locks */ 3376 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 3377 mtx_destroy(&nfsrchash_table[i].mtx); 3378 mtx_destroy(&nfsrcahash_table[i].mtx); 3379 } 3380 mtx_destroy(&nfsrc_udpmtx); 3381 mtx_destroy(&nfs_v4root_mutex); 3382 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 3383 for (i = 0; i < nfsrv_sessionhashsize; i++) 3384 mtx_destroy(&nfssessionhash[i].mtx); 3385 lockdestroy(&nfsv4root_mnt.mnt_explock); 3386 free(nfsclienthash, M_NFSDCLIENT); 3387 free(nfslockhash, M_NFSDLOCKFILE); 3388 free(nfssessionhash, M_NFSDSESSION); 3389 loaded = 0; 3390 break; 3391 default: 3392 error = EOPNOTSUPP; 3393 break; 3394 } 3395 3396out: 3397 NFSEXITCODE(error); 3398 return (error); 3399} 3400static moduledata_t nfsd_mod = { 3401 "nfsd", 3402 nfsd_modevent, 3403 NULL, 3404}; 3405DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 3406 3407/* So that loader and kldload(2) can find us, wherever we are.. */ 3408MODULE_VERSION(nfsd, 1); 3409MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 3410MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 3411MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 3412MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 3413MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 3414 3415