nfs_serv.c revision 1.132
1 /* $NetBSD: nfs_serv.c,v 1.132 2007/12/04 17:42:30 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * nfs version 2 and 3 server calls to vnode ops 39 * - these routines generally have 3 phases 40 * 1 - break down and validate rpc request in mbuf list 41 * 2 - do the vnode ops for the request 42 * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) 43 * 3 - build the rpc reply in an mbuf list 44 * nb: 45 * - do not mix the phases, since the nfsm_?? macros can return failures 46 * on a bad rpc or similar and do not do any vrele() or vput()'s 47 * 48 * - the nfsm_reply() macro generates an nfs rpc reply with the nfs 49 * error number iff error != 0 whereas 50 * returning an error from the server function implies a fatal error 51 * such as a badly constructed rpc request that should be dropped without 52 * a reply. 53 * For Version 3, nfsm_reply() does not return for the error case, since 54 * most version 3 rpcs return more than the status for error cases. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.132 2007/12/04 17:42:30 yamt Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/proc.h> 63 #include <sys/file.h> 64 #include <sys/namei.h> 65 #include <sys/vnode.h> 66 #include <sys/mount.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/mbuf.h> 70 #include <sys/dirent.h> 71 #include <sys/stat.h> 72 #include <sys/kernel.h> 73 #include <sys/hash.h> 74 #include <sys/kauth.h> 75 76 #include <uvm/uvm.h> 77 78 #include <nfs/nfsproto.h> 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfs.h> 81 #include <nfs/xdr_subs.h> 82 #include <nfs/nfsm_subs.h> 83 #include <nfs/nfs_var.h> 84 85 /* Global vars */ 86 extern u_int32_t nfs_xdrneg1; 87 extern u_int32_t nfs_false, nfs_true; 88 extern enum vtype nv3tov_type[8]; 89 extern struct nfsstats nfsstats; 90 extern const nfstype nfsv2_type[9]; 91 extern const nfstype nfsv3_type[9]; 92 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 93 int nfsd_use_loan = 1; /* use page-loan for READ OP */ 94 95 #define nqsrv_getl(vp, rw) /* nothing */ 96 97 /* 98 * nfs v3 access service 99 */ 100 int 101 nfsrv3_access(nfsd, slp, lwp, mrq) 102 struct nfsrv_descript *nfsd; 103 struct nfssvc_sock *slp; 104 struct lwp *lwp; 105 struct mbuf **mrq; 106 { 107 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 108 struct mbuf *nam = nfsd->nd_nam; 109 char *dpos = nfsd->nd_dpos; 110 kauth_cred_t cred = nfsd->nd_cr; 111 struct vnode *vp; 112 nfsrvfh_t nsfh; 113 u_int32_t *tl; 114 int32_t t1; 115 char *bpos; 116 int error = 0, rdonly, cache = 0, getret; 117 char *cp2; 118 struct mbuf *mb, *mreq; 119 struct vattr va; 120 u_long inmode, testmode, outmode; 121 u_quad_t frev; 122 123 nfsm_srvmtofh(&nsfh); 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 125 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 126 (nfsd->nd_flag & ND_KERBAUTH), false); 127 if (error) { 128 nfsm_reply(NFSX_UNSIGNED); 129 nfsm_srvpostop_attr(1, (struct vattr *)0); 130 return (0); 131 } 132 inmode = fxdr_unsigned(u_int32_t, *tl); 133 outmode = 0; 134 if ((inmode & NFSV3ACCESS_READ) && 135 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 136 outmode |= NFSV3ACCESS_READ; 137 if (vp->v_type != VDIR) { 138 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 139 if (testmode && 140 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 141 outmode |= testmode; 142 if ((inmode & NFSV3ACCESS_EXECUTE) && 143 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 144 outmode |= NFSV3ACCESS_EXECUTE; 145 } else { 146 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 147 NFSV3ACCESS_DELETE); 148 if (testmode && 149 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 150 outmode |= testmode; 151 if ((inmode & NFSV3ACCESS_LOOKUP) && 152 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 153 outmode |= NFSV3ACCESS_LOOKUP; 154 } 155 getret = VOP_GETATTR(vp, &va, cred); 156 vput(vp); 157 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 158 nfsm_srvpostop_attr(getret, &va); 159 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 160 *tl = txdr_unsigned(outmode); 161 nfsm_srvdone; 162 } 163 164 /* 165 * nfs getattr service 166 */ 167 int 168 nfsrv_getattr(nfsd, slp, lwp, mrq) 169 struct nfsrv_descript *nfsd; 170 struct nfssvc_sock *slp; 171 struct lwp *lwp; 172 struct mbuf **mrq; 173 { 174 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 175 struct mbuf *nam = nfsd->nd_nam; 176 char *dpos = nfsd->nd_dpos; 177 kauth_cred_t cred = nfsd->nd_cr; 178 struct nfs_fattr *fp; 179 struct vattr va; 180 struct vnode *vp; 181 nfsrvfh_t nsfh; 182 u_int32_t *tl; 183 int32_t t1; 184 char *bpos; 185 int error = 0, rdonly, cache = 0; 186 char *cp2; 187 struct mbuf *mb, *mreq; 188 u_quad_t frev; 189 190 nfsm_srvmtofh(&nsfh); 191 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 192 (nfsd->nd_flag & ND_KERBAUTH), false); 193 if (error) { 194 nfsm_reply(0); 195 return (0); 196 } 197 nqsrv_getl(vp, ND_READ); 198 error = VOP_GETATTR(vp, &va, cred); 199 vput(vp); 200 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 201 if (error) 202 return (0); 203 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 204 nfsm_srvfillattr(&va, fp); 205 nfsm_srvdone; 206 } 207 208 /* 209 * nfs setattr service 210 */ 211 int 212 nfsrv_setattr(nfsd, slp, lwp, mrq) 213 struct nfsrv_descript *nfsd; 214 struct nfssvc_sock *slp; 215 struct lwp *lwp; 216 struct mbuf **mrq; 217 { 218 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 219 struct mbuf *nam = nfsd->nd_nam; 220 char *dpos = nfsd->nd_dpos; 221 kauth_cred_t cred = nfsd->nd_cr; 222 struct vattr va, preat; 223 struct nfsv2_sattr *sp; 224 struct nfs_fattr *fp; 225 struct vnode *vp; 226 nfsrvfh_t nsfh; 227 u_int32_t *tl; 228 int32_t t1; 229 char *bpos; 230 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 231 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 232 char *cp2; 233 struct mbuf *mb, *mreq; 234 u_quad_t frev; 235 struct timespec guard; 236 237 memset(&guard, 0, sizeof guard); /* XXX gcc */ 238 239 nfsm_srvmtofh(&nsfh); 240 VATTR_NULL(&va); 241 if (v3) { 242 nfsm_srvsattr(&va); 243 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 244 gcheck = fxdr_unsigned(int, *tl); 245 if (gcheck) { 246 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 247 fxdr_nfsv3time(tl, &guard); 248 } 249 } else { 250 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 251 /* 252 * Nah nah nah nah na nah 253 * There is a bug in the Sun client that puts 0xffff in the mode 254 * field of sattr when it should put in 0xffffffff. The u_short 255 * doesn't sign extend. 256 * --> check the low order 2 bytes for 0xffff 257 */ 258 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 259 va.va_mode = nfstov_mode(sp->sa_mode); 260 if (sp->sa_uid != nfs_xdrneg1) 261 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 262 if (sp->sa_gid != nfs_xdrneg1) 263 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 264 if (sp->sa_size != nfs_xdrneg1) 265 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 266 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 267 #ifdef notyet 268 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 269 #else 270 va.va_atime.tv_sec = 271 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 272 va.va_atime.tv_nsec = 0; 273 #endif 274 } 275 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 276 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 277 278 } 279 280 /* 281 * Now that we have all the fields, lets do it. 282 */ 283 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 284 (nfsd->nd_flag & ND_KERBAUTH), false); 285 if (error) { 286 nfsm_reply(2 * NFSX_UNSIGNED); 287 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 288 return (0); 289 } 290 nqsrv_getl(vp, ND_WRITE); 291 if (v3) { 292 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 293 if (!error && gcheck && 294 (preat.va_ctime.tv_sec != guard.tv_sec || 295 preat.va_ctime.tv_nsec != guard.tv_nsec)) 296 error = NFSERR_NOT_SYNC; 297 if (error) { 298 vput(vp); 299 nfsm_reply(NFSX_WCCDATA(v3)); 300 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 301 return (0); 302 } 303 } 304 305 /* 306 * If the size is being changed write acces is required, otherwise 307 * just check for a read only file system. 308 */ 309 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 310 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 311 error = EROFS; 312 goto out; 313 } 314 } else { 315 if (vp->v_type == VDIR) { 316 error = EISDIR; 317 goto out; 318 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 319 lwp, 0)) != 0) 320 goto out; 321 } 322 error = VOP_SETATTR(vp, &va, cred); 323 postat_ret = VOP_GETATTR(vp, &va, cred); 324 if (!error) 325 error = postat_ret; 326 out: 327 vput(vp); 328 nfsm_reply(NFSX_WCCORFATTR(v3)); 329 if (v3) { 330 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 331 return (0); 332 } else { 333 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 334 nfsm_srvfillattr(&va, fp); 335 } 336 nfsm_srvdone; 337 } 338 339 /* 340 * nfs lookup rpc 341 */ 342 int 343 nfsrv_lookup(nfsd, slp, lwp, mrq) 344 struct nfsrv_descript *nfsd; 345 struct nfssvc_sock *slp; 346 struct lwp *lwp; 347 struct mbuf **mrq; 348 { 349 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 350 struct mbuf *nam = nfsd->nd_nam; 351 char *dpos = nfsd->nd_dpos; 352 kauth_cred_t cred = nfsd->nd_cr; 353 struct nfs_fattr *fp; 354 struct nameidata nd, ind, *ndp = &nd; 355 struct vnode *vp, *dirp; 356 nfsrvfh_t nsfh; 357 char *cp; 358 u_int32_t *tl; 359 int32_t t1; 360 char *bpos; 361 int error = 0, cache = 0, dirattr_ret = 1; 362 uint32_t len; 363 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 364 char *cp2; 365 struct mbuf *mb, *mreq; 366 struct vattr va, dirattr; 367 u_quad_t frev; 368 369 nfsm_srvmtofh(&nsfh); 370 nfsm_srvnamesiz(len); 371 372 pubflag = nfs_ispublicfh(&nsfh); 373 374 nd.ni_cnd.cn_cred = cred; 375 nd.ni_cnd.cn_nameiop = LOOKUP; 376 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 377 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 378 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 379 380 if (!error && pubflag) { 381 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 382 /* 383 * Setup call to lookup() to see if we can find 384 * the index file. Arguably, this doesn't belong 385 * in a kernel.. Ugh. 386 */ 387 ind = nd; 388 VOP_UNLOCK(nd.ni_vp, 0); 389 ind.ni_pathlen = strlen(nfs_pub.np_index); 390 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 391 nfs_pub.np_index; 392 ind.ni_startdir = nd.ni_vp; 393 VREF(ind.ni_startdir); 394 error = lookup(&ind); 395 if (!error) { 396 /* 397 * Found an index file. Get rid of 398 * the old references. 399 */ 400 if (dirp) 401 vrele(dirp); 402 dirp = nd.ni_vp; 403 vrele(nd.ni_startdir); 404 ndp = &ind; 405 } else 406 error = 0; 407 } 408 /* 409 * If the public filehandle was used, check that this lookup 410 * didn't result in a filehandle outside the publicly exported 411 * filesystem. 412 */ 413 414 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 415 vput(nd.ni_vp); 416 error = EPERM; 417 } 418 } 419 420 if (dirp) { 421 if (v3) 422 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 423 vrele(dirp); 424 } 425 426 if (error) { 427 nfsm_reply(NFSX_POSTOPATTR(v3)); 428 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 429 return (0); 430 } 431 432 nqsrv_getl(ndp->ni_startdir, ND_READ); 433 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 434 vp = ndp->ni_vp; 435 error = nfsrv_composefh(vp, &nsfh, v3); 436 if (!error) 437 error = VOP_GETATTR(vp, &va, cred); 438 vput(vp); 439 vrele(ndp->ni_startdir); 440 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 441 NFSX_POSTOPATTR(v3)); 442 if (error) { 443 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 444 return (0); 445 } 446 nfsm_srvfhtom(&nsfh, v3); 447 if (v3) { 448 nfsm_srvpostop_attr(0, &va); 449 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 450 } else { 451 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 452 nfsm_srvfillattr(&va, fp); 453 } 454 nfsm_srvdone; 455 } 456 457 /* 458 * nfs readlink service 459 */ 460 int 461 nfsrv_readlink(nfsd, slp, lwp, mrq) 462 struct nfsrv_descript *nfsd; 463 struct nfssvc_sock *slp; 464 struct lwp *lwp; 465 struct mbuf **mrq; 466 { 467 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 468 struct mbuf *nam = nfsd->nd_nam; 469 char *dpos = nfsd->nd_dpos; 470 kauth_cred_t cred = nfsd->nd_cr; 471 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 472 struct iovec *ivp = iv; 473 struct mbuf *mp; 474 u_int32_t *tl; 475 int32_t t1; 476 char *bpos; 477 int error = 0, rdonly, cache = 0, i, padlen, getret; 478 uint32_t len; 479 int v3 = (nfsd->nd_flag & ND_NFSV3); 480 char *cp2; 481 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 482 struct vnode *vp; 483 struct vattr attr; 484 nfsrvfh_t nsfh; 485 struct uio io, *uiop = &io; 486 u_quad_t frev; 487 488 nfsm_srvmtofh(&nsfh); 489 len = 0; 490 i = 0; 491 while (len < NFS_MAXPATHLEN) { 492 mp = m_get(M_WAIT, MT_DATA); 493 MCLAIM(mp, &nfs_mowner); 494 m_clget(mp, M_WAIT); 495 mp->m_len = NFSMSIZ(mp); 496 if (len == 0) 497 mp3 = mp2 = mp; 498 else { 499 mp2->m_next = mp; 500 mp2 = mp; 501 } 502 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 503 mp->m_len = NFS_MAXPATHLEN-len; 504 len = NFS_MAXPATHLEN; 505 } else 506 len += mp->m_len; 507 ivp->iov_base = mtod(mp, void *); 508 ivp->iov_len = mp->m_len; 509 i++; 510 ivp++; 511 } 512 uiop->uio_iov = iv; 513 uiop->uio_iovcnt = i; 514 uiop->uio_offset = 0; 515 uiop->uio_resid = len; 516 uiop->uio_rw = UIO_READ; 517 UIO_SETUP_SYSSPACE(uiop); 518 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 519 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 520 if (error) { 521 m_freem(mp3); 522 nfsm_reply(2 * NFSX_UNSIGNED); 523 nfsm_srvpostop_attr(1, (struct vattr *)0); 524 return (0); 525 } 526 if (vp->v_type != VLNK) { 527 if (v3) 528 error = EINVAL; 529 else 530 error = ENXIO; 531 goto out; 532 } 533 nqsrv_getl(vp, ND_READ); 534 error = VOP_READLINK(vp, uiop, cred); 535 out: 536 getret = VOP_GETATTR(vp, &attr, cred); 537 vput(vp); 538 if (error) 539 m_freem(mp3); 540 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 541 if (v3) { 542 nfsm_srvpostop_attr(getret, &attr); 543 if (error) 544 return (0); 545 } 546 len -= uiop->uio_resid; 547 padlen = nfsm_padlen(len); 548 if (uiop->uio_resid || padlen) 549 nfs_zeropad(mp3, uiop->uio_resid, padlen); 550 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 551 *tl = txdr_unsigned(len); 552 mb->m_next = mp3; 553 nfsm_srvdone; 554 } 555 556 /* 557 * nfs read service 558 */ 559 int 560 nfsrv_read(nfsd, slp, lwp, mrq) 561 struct nfsrv_descript *nfsd; 562 struct nfssvc_sock *slp; 563 struct lwp *lwp; 564 struct mbuf **mrq; 565 { 566 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 567 struct mbuf *nam = nfsd->nd_nam; 568 char *dpos = nfsd->nd_dpos; 569 kauth_cred_t cred = nfsd->nd_cr; 570 struct mbuf *m; 571 struct nfs_fattr *fp; 572 u_int32_t *tl; 573 int32_t t1; 574 int i; 575 char *bpos; 576 int error = 0, rdonly, cache = 0, getret; 577 int v3 = (nfsd->nd_flag & ND_NFSV3); 578 uint32_t reqlen, len, cnt, left; 579 int padlen; 580 char *cp2; 581 struct mbuf *mb, *mreq; 582 struct vnode *vp; 583 nfsrvfh_t nsfh; 584 struct uio io, *uiop = &io; 585 struct vattr va; 586 off_t off; 587 u_quad_t frev; 588 589 nfsm_srvmtofh(&nsfh); 590 if (v3) { 591 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 592 off = fxdr_hyper(tl); 593 } else { 594 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 595 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 596 } 597 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 598 reqlen = fxdr_unsigned(uint32_t, *tl); 599 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 600 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 601 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 602 if (error) { 603 nfsm_reply(2 * NFSX_UNSIGNED); 604 nfsm_srvpostop_attr(1, (struct vattr *)0); 605 return (0); 606 } 607 if (vp->v_type != VREG) { 608 if (v3) 609 error = EINVAL; 610 else 611 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 612 } 613 if (!error) { 614 nqsrv_getl(vp, ND_READ); 615 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 616 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 617 } 618 getret = VOP_GETATTR(vp, &va, cred); 619 if (!error) 620 error = getret; 621 if (error) { 622 vput(vp); 623 nfsm_reply(NFSX_POSTOPATTR(v3)); 624 nfsm_srvpostop_attr(getret, &va); 625 return (0); 626 } 627 if (off >= va.va_size) 628 cnt = 0; 629 else if ((off + reqlen) > va.va_size) 630 cnt = va.va_size - off; 631 else 632 cnt = reqlen; 633 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 634 if (v3) { 635 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 636 *tl++ = nfs_true; 637 fp = (struct nfs_fattr *)tl; 638 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 639 } else { 640 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 641 fp = (struct nfs_fattr *)tl; 642 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 643 } 644 len = left = cnt; 645 if (cnt > 0) { 646 if (nfsd_use_loan) { 647 struct vm_page **pgpp; 648 voff_t pgoff = trunc_page(off); 649 int npages; 650 vaddr_t lva; 651 652 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 653 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 654 655 /* allocate kva for mbuf data */ 656 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 657 if (lva == 0) { 658 /* fall back to VOP_READ */ 659 goto loan_fail; 660 } 661 662 /* allocate mbuf */ 663 m = m_get(M_WAIT, MT_DATA); 664 MCLAIM(m, &nfs_mowner); 665 pgpp = m->m_ext.ext_pgs; 666 667 /* loan pages */ 668 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 669 pgpp); 670 if (error) { 671 sokvafree(lva, npages << PAGE_SHIFT); 672 m_free(m); 673 if (error == EBUSY) 674 goto loan_fail; 675 goto read_error; 676 } 677 678 /* associate kva to mbuf */ 679 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 680 cnt, M_MBUF, soloanfree, slp->ns_so); 681 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 682 m->m_len = cnt; 683 684 /* map pages */ 685 for (i = 0; i < npages; i++) { 686 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 687 VM_PROT_READ); 688 lva += PAGE_SIZE; 689 } 690 691 pmap_update(pmap_kernel()); 692 693 mb->m_next = m; 694 mb = m; 695 error = 0; 696 uiop->uio_resid = 0; 697 } else { 698 struct iovec *iv; 699 struct iovec *iv2; 700 struct mbuf *m2; 701 int siz; 702 loan_fail: 703 /* 704 * Generate the mbuf list with the uio_iov ref. to it. 705 */ 706 i = 0; 707 m = m2 = mb; 708 while (left > 0) { 709 siz = min(M_TRAILINGSPACE(m), left); 710 if (siz > 0) { 711 left -= siz; 712 i++; 713 } 714 if (left > 0) { 715 m = m_get(M_WAIT, MT_DATA); 716 MCLAIM(m, &nfs_mowner); 717 m_clget(m, M_WAIT); 718 m->m_len = 0; 719 m2->m_next = m; 720 m2 = m; 721 } 722 } 723 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 724 uiop->uio_iov = iv2 = iv; 725 m = mb; 726 left = cnt; 727 i = 0; 728 while (left > 0) { 729 if (m == NULL) 730 panic("nfsrv_read iov"); 731 siz = min(M_TRAILINGSPACE(m), left); 732 if (siz > 0) { 733 iv->iov_base = mtod(m, char *) + 734 m->m_len; 735 iv->iov_len = siz; 736 m->m_len += siz; 737 left -= siz; 738 iv++; 739 i++; 740 } 741 m = m->m_next; 742 } 743 uiop->uio_iovcnt = i; 744 uiop->uio_offset = off; 745 uiop->uio_resid = cnt; 746 uiop->uio_rw = UIO_READ; 747 UIO_SETUP_SYSSPACE(uiop); 748 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 749 free((void *)iv2, M_TEMP); 750 } 751 read_error: 752 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 753 if (!error) 754 error = getret; 755 m_freem(mreq); 756 vput(vp); 757 nfsm_reply(NFSX_POSTOPATTR(v3)); 758 nfsm_srvpostop_attr(getret, &va); 759 return (0); 760 } 761 } else { 762 uiop->uio_resid = 0; 763 } 764 vput(vp); 765 nfsm_srvfillattr(&va, fp); 766 len -= uiop->uio_resid; 767 padlen = nfsm_padlen(len); 768 if (uiop->uio_resid || padlen) 769 nfs_zeropad(mb, uiop->uio_resid, padlen); 770 if (v3) { 771 /* count */ 772 *tl++ = txdr_unsigned(len); 773 /* eof */ 774 if (off + len >= va.va_size) 775 *tl++ = nfs_true; 776 else 777 *tl++ = nfs_false; 778 } 779 *tl = txdr_unsigned(len); 780 nfsm_srvdone; 781 } 782 783 /* 784 * nfs write service 785 */ 786 int 787 nfsrv_write(nfsd, slp, lwp, mrq) 788 struct nfsrv_descript *nfsd; 789 struct nfssvc_sock *slp; 790 struct lwp *lwp; 791 struct mbuf **mrq; 792 { 793 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 794 struct mbuf *nam = nfsd->nd_nam; 795 char *dpos = nfsd->nd_dpos; 796 kauth_cred_t cred = nfsd->nd_cr; 797 struct iovec *ivp; 798 int i, cnt; 799 struct mbuf *mp; 800 struct nfs_fattr *fp; 801 struct iovec *iv; 802 struct vattr va, forat; 803 u_int32_t *tl; 804 int32_t t1; 805 char *bpos; 806 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 807 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 808 int stable = NFSV3WRITE_FILESYNC; 809 int v3 = (nfsd->nd_flag & ND_NFSV3); 810 char *cp2; 811 struct mbuf *mb, *mreq; 812 struct vnode *vp; 813 nfsrvfh_t nsfh; 814 struct uio io, *uiop = &io; 815 off_t off; 816 u_quad_t frev; 817 818 if (mrep == NULL) { 819 *mrq = NULL; 820 return (0); 821 } 822 nfsm_srvmtofh(&nsfh); 823 if (v3) { 824 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 825 off = fxdr_hyper(tl); 826 tl += 3; 827 stable = fxdr_unsigned(int, *tl++); 828 } else { 829 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 830 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 831 tl += 2; 832 } 833 retlen = len = fxdr_unsigned(int32_t, *tl); 834 cnt = i = 0; 835 836 /* 837 * For NFS Version 2, it is not obvious what a write of zero length 838 * should do, but I might as well be consistent with Version 3, 839 * which is to return ok so long as there are no permission problems. 840 */ 841 if (len > 0) { 842 zeroing = 1; 843 mp = mrep; 844 while (mp) { 845 if (mp == md) { 846 zeroing = 0; 847 adjust = dpos - mtod(mp, char *); 848 mp->m_len -= adjust; 849 if (mp->m_len > 0 && adjust > 0) 850 NFSMADV(mp, adjust); 851 } 852 if (zeroing) 853 mp->m_len = 0; 854 else if (mp->m_len > 0) { 855 i += mp->m_len; 856 if (i > len) { 857 mp->m_len -= (i - len); 858 zeroing = 1; 859 } 860 if (mp->m_len > 0) 861 cnt++; 862 } 863 mp = mp->m_next; 864 } 865 } 866 if (len > NFS_MAXDATA || len < 0 || i < len) { 867 error = EIO; 868 nfsm_reply(2 * NFSX_UNSIGNED); 869 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 870 return (0); 871 } 872 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 873 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 874 if (error) { 875 nfsm_reply(2 * NFSX_UNSIGNED); 876 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 877 return (0); 878 } 879 if (v3) 880 forat_ret = VOP_GETATTR(vp, &forat, cred); 881 if (vp->v_type != VREG) { 882 if (v3) 883 error = EINVAL; 884 else 885 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 886 } 887 if (!error) { 888 nqsrv_getl(vp, ND_WRITE); 889 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 890 } 891 if (error) { 892 vput(vp); 893 nfsm_reply(NFSX_WCCDATA(v3)); 894 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 895 return (0); 896 } 897 898 if (len > 0) { 899 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 900 uiop->uio_iov = iv = ivp; 901 uiop->uio_iovcnt = cnt; 902 mp = mrep; 903 while (mp) { 904 if (mp->m_len > 0) { 905 ivp->iov_base = mtod(mp, void *); 906 ivp->iov_len = mp->m_len; 907 ivp++; 908 } 909 mp = mp->m_next; 910 } 911 912 /* 913 * XXX 914 * The IO_METASYNC flag indicates that all metadata (and not 915 * just enough to ensure data integrity) must be written to 916 * stable storage synchronously. 917 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 918 */ 919 if (stable == NFSV3WRITE_UNSTABLE) 920 ioflags = IO_NODELOCKED; 921 else if (stable == NFSV3WRITE_DATASYNC) 922 ioflags = (IO_SYNC | IO_NODELOCKED); 923 else 924 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 925 uiop->uio_resid = len; 926 uiop->uio_rw = UIO_WRITE; 927 uiop->uio_offset = off; 928 UIO_SETUP_SYSSPACE(uiop); 929 error = VOP_WRITE(vp, uiop, ioflags, cred); 930 nfsstats.srvvop_writes++; 931 free(iv, M_TEMP); 932 } 933 aftat_ret = VOP_GETATTR(vp, &va, cred); 934 vput(vp); 935 if (!error) 936 error = aftat_ret; 937 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 938 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 939 if (v3) { 940 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 941 if (error) 942 return (0); 943 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 944 *tl++ = txdr_unsigned(retlen); 945 if (stable == NFSV3WRITE_UNSTABLE) 946 *tl++ = txdr_unsigned(stable); 947 else 948 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 949 /* 950 * Actually, there is no need to txdr these fields, 951 * but it may make the values more human readable, 952 * for debugging purposes. 953 */ 954 *tl++ = txdr_unsigned(boottime.tv_sec); 955 *tl = txdr_unsigned(boottime.tv_usec); 956 } else { 957 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 958 nfsm_srvfillattr(&va, fp); 959 } 960 nfsm_srvdone; 961 } 962 963 /* 964 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 965 * two nd_flag fields of the descriptors contained 966 * ND_KERBAUTH. 967 */ 968 static int 969 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 970 { 971 int i, do_ngroups; 972 973 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 974 return (0); 975 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 976 return (0); 977 do_ngroups = kauth_cred_ngroups(cred1); 978 for (i = 0; i < do_ngroups; i++) 979 if (kauth_cred_group(cred1, i) != 980 kauth_cred_group(cred2, i)) 981 return (0); 982 983 return (1); 984 } 985 986 static struct nfsrvw_delayhash * 987 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 988 { 989 uint32_t hash; 990 991 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 992 HASH32_BUF_INIT); 993 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 994 } 995 996 /* 997 * NFS write service with write gathering support. Called when 998 * nfsrvw_procrastinate > 0. 999 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1000 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1001 * Jan. 1994. 1002 */ 1003 int 1004 nfsrv_writegather(ndp, slp, lwp, mrq) 1005 struct nfsrv_descript **ndp; 1006 struct nfssvc_sock *slp; 1007 struct lwp *lwp; 1008 struct mbuf **mrq; 1009 { 1010 struct timeval now; 1011 struct iovec *ivp; 1012 struct mbuf *mp; 1013 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1014 struct nfs_fattr *fp; 1015 int i = 0; 1016 struct iovec *iov; 1017 struct nfsrvw_delayhash *wpp; 1018 kauth_cred_t cred; 1019 struct vattr va, forat; 1020 u_int32_t *tl; 1021 int32_t t1; 1022 char *bpos, *dpos; 1023 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1024 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1025 char *cp2; 1026 struct mbuf *mb, *mreq, *mrep, *md; 1027 struct vnode *vp; 1028 struct uio io, *uiop = &io; 1029 u_quad_t frev, cur_usec; 1030 1031 *mrq = NULL; 1032 if (*ndp) { 1033 nfsd = *ndp; 1034 *ndp = NULL; 1035 mrep = nfsd->nd_mrep; 1036 md = nfsd->nd_md; 1037 dpos = nfsd->nd_dpos; 1038 cred = nfsd->nd_cr; 1039 v3 = (nfsd->nd_flag & ND_NFSV3); 1040 LIST_INIT(&nfsd->nd_coalesce); 1041 nfsd->nd_mreq = NULL; 1042 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1043 getmicrotime(&now); 1044 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1045 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1046 1047 /* 1048 * Now, get the write header.. 1049 */ 1050 nfsm_srvmtofh(&nfsd->nd_fh); 1051 if (v3) { 1052 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1053 nfsd->nd_off = fxdr_hyper(tl); 1054 tl += 3; 1055 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1056 } else { 1057 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1058 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1059 tl += 2; 1060 } 1061 len = fxdr_unsigned(int32_t, *tl); 1062 nfsd->nd_len = len; 1063 nfsd->nd_eoff = nfsd->nd_off + len; 1064 1065 /* 1066 * Trim the header out of the mbuf list and trim off any trailing 1067 * junk so that the mbuf list has only the write data. 1068 */ 1069 zeroing = 1; 1070 i = 0; 1071 mp = mrep; 1072 while (mp) { 1073 if (mp == md) { 1074 zeroing = 0; 1075 adjust = dpos - mtod(mp, char *); 1076 mp->m_len -= adjust; 1077 if (mp->m_len > 0 && adjust > 0) 1078 NFSMADV(mp, adjust); 1079 } 1080 if (zeroing) 1081 mp->m_len = 0; 1082 else { 1083 i += mp->m_len; 1084 if (i > len) { 1085 mp->m_len -= (i - len); 1086 zeroing = 1; 1087 } 1088 } 1089 mp = mp->m_next; 1090 } 1091 if (len > NFS_MAXDATA || len < 0 || i < len) { 1092 nfsmout: 1093 m_freem(mrep); 1094 error = EIO; 1095 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1096 if (v3) 1097 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1098 nfsd->nd_mreq = mreq; 1099 nfsd->nd_mrep = NULL; 1100 nfsd->nd_time = 0; 1101 } 1102 1103 /* 1104 * Add this entry to the hash and time queues. 1105 */ 1106 owp = NULL; 1107 mutex_enter(&nfsd_lock); 1108 wp = LIST_FIRST(&slp->ns_tq); 1109 while (wp && wp->nd_time < nfsd->nd_time) { 1110 owp = wp; 1111 wp = LIST_NEXT(wp, nd_tq); 1112 } 1113 if (owp) { 1114 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1115 } else { 1116 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1117 } 1118 if (nfsd->nd_mrep) { 1119 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1120 owp = NULL; 1121 wp = LIST_FIRST(wpp); 1122 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1123 owp = wp; 1124 wp = LIST_NEXT(wp, nd_hash); 1125 } 1126 while (wp && wp->nd_off < nfsd->nd_off && 1127 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1128 owp = wp; 1129 wp = LIST_NEXT(wp, nd_hash); 1130 } 1131 if (owp) { 1132 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1133 1134 /* 1135 * Search the hash list for overlapping entries and 1136 * coalesce. 1137 */ 1138 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1139 wp = LIST_NEXT(nfsd, nd_hash); 1140 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1141 nfsrvw_coalesce(owp, nfsd); 1142 } 1143 } else { 1144 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1145 } 1146 } 1147 mutex_exit(&nfsd_lock); 1148 } 1149 1150 /* 1151 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1152 * and generate the associated reply mbuf list(s). 1153 */ 1154 loop1: 1155 getmicrotime(&now); 1156 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1157 mutex_enter(&nfsd_lock); 1158 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1159 owp = LIST_NEXT(nfsd, nd_tq); 1160 if (nfsd->nd_time > cur_usec) 1161 break; 1162 if (nfsd->nd_mreq) 1163 continue; 1164 LIST_REMOVE(nfsd, nd_tq); 1165 LIST_REMOVE(nfsd, nd_hash); 1166 mutex_exit(&nfsd_lock); 1167 1168 mrep = nfsd->nd_mrep; 1169 nfsd->nd_mrep = NULL; 1170 cred = nfsd->nd_cr; 1171 v3 = (nfsd->nd_flag & ND_NFSV3); 1172 forat_ret = aftat_ret = 1; 1173 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1174 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1175 false); 1176 if (!error) { 1177 if (v3) 1178 forat_ret = VOP_GETATTR(vp, &forat, cred); 1179 if (vp->v_type != VREG) { 1180 if (v3) 1181 error = EINVAL; 1182 else 1183 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1184 } 1185 } else 1186 vp = NULL; 1187 if (!error) { 1188 nqsrv_getl(vp, ND_WRITE); 1189 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1190 } 1191 1192 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1193 ioflags = IO_NODELOCKED; 1194 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1195 ioflags = (IO_SYNC | IO_NODELOCKED); 1196 else 1197 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1198 uiop->uio_rw = UIO_WRITE; 1199 uiop->uio_offset = nfsd->nd_off; 1200 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1201 UIO_SETUP_SYSSPACE(uiop); 1202 if (uiop->uio_resid > 0) { 1203 mp = mrep; 1204 i = 0; 1205 while (mp) { 1206 if (mp->m_len > 0) 1207 i++; 1208 mp = mp->m_next; 1209 } 1210 uiop->uio_iovcnt = i; 1211 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1212 uiop->uio_iov = ivp = iov; 1213 mp = mrep; 1214 while (mp) { 1215 if (mp->m_len > 0) { 1216 ivp->iov_base = mtod(mp, void *); 1217 ivp->iov_len = mp->m_len; 1218 ivp++; 1219 } 1220 mp = mp->m_next; 1221 } 1222 if (!error) { 1223 error = VOP_WRITE(vp, uiop, ioflags, cred); 1224 nfsstats.srvvop_writes++; 1225 } 1226 free((void *)iov, M_TEMP); 1227 } 1228 m_freem(mrep); 1229 if (vp) { 1230 aftat_ret = VOP_GETATTR(vp, &va, cred); 1231 vput(vp); 1232 } 1233 1234 /* 1235 * Loop around generating replies for all write rpcs that have 1236 * now been completed. 1237 */ 1238 swp = nfsd; 1239 do { 1240 if (error) { 1241 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1242 if (v3) { 1243 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1244 } 1245 } else { 1246 nfsm_writereply(NFSX_PREOPATTR(v3) + 1247 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1248 NFSX_WRITEVERF(v3), v3); 1249 if (v3) { 1250 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1251 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1252 *tl++ = txdr_unsigned(nfsd->nd_len); 1253 *tl++ = txdr_unsigned(swp->nd_stable); 1254 /* 1255 * Actually, there is no need to txdr these fields, 1256 * but it may make the values more human readable, 1257 * for debugging purposes. 1258 */ 1259 *tl++ = txdr_unsigned(boottime.tv_sec); 1260 *tl = txdr_unsigned(boottime.tv_usec); 1261 } else { 1262 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1263 nfsm_srvfillattr(&va, fp); 1264 } 1265 } 1266 nfsd->nd_mreq = mreq; 1267 if (nfsd->nd_mrep) 1268 panic("nfsrv_write: nd_mrep not free"); 1269 1270 /* 1271 * Done. Put it at the head of the timer queue so that 1272 * the final phase can return the reply. 1273 */ 1274 mutex_enter(&nfsd_lock); 1275 if (nfsd != swp) { 1276 nfsd->nd_time = 0; 1277 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1278 } 1279 nfsd = LIST_FIRST(&swp->nd_coalesce); 1280 if (nfsd) { 1281 LIST_REMOVE(nfsd, nd_tq); 1282 } 1283 mutex_exit(&nfsd_lock); 1284 } while (nfsd); 1285 swp->nd_time = 0; 1286 1287 mutex_enter(&nfsd_lock); 1288 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1289 mutex_exit(&nfsd_lock); 1290 goto loop1; 1291 } 1292 mutex_exit(&nfsd_lock); 1293 nfs_timer_start(); 1294 1295 /* 1296 * Search for a reply to return. 1297 */ 1298 mutex_enter(&nfsd_lock); 1299 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1300 if (nfsd->nd_mreq) { 1301 LIST_REMOVE(nfsd, nd_tq); 1302 *mrq = nfsd->nd_mreq; 1303 *ndp = nfsd; 1304 break; 1305 } 1306 } 1307 mutex_exit(&nfsd_lock); 1308 return (0); 1309 } 1310 1311 /* 1312 * Coalesce the write request nfsd into owp. To do this we must: 1313 * - remove nfsd from the queues 1314 * - merge nfsd->nd_mrep into owp->nd_mrep 1315 * - update the nd_eoff and nd_stable for owp 1316 * - put nfsd on owp's nd_coalesce list 1317 * NB: Must be called at splsoftclock(). 1318 */ 1319 void 1320 nfsrvw_coalesce(owp, nfsd) 1321 struct nfsrv_descript *owp; 1322 struct nfsrv_descript *nfsd; 1323 { 1324 int overlap; 1325 struct mbuf *mp; 1326 struct nfsrv_descript *m; 1327 1328 KASSERT(mutex_owned(&nfsd_lock)); 1329 1330 LIST_REMOVE(nfsd, nd_hash); 1331 LIST_REMOVE(nfsd, nd_tq); 1332 if (owp->nd_eoff < nfsd->nd_eoff) { 1333 overlap = owp->nd_eoff - nfsd->nd_off; 1334 if (overlap < 0) 1335 panic("nfsrv_coalesce: bad off"); 1336 if (overlap > 0) 1337 m_adj(nfsd->nd_mrep, overlap); 1338 mp = owp->nd_mrep; 1339 while (mp->m_next) 1340 mp = mp->m_next; 1341 mp->m_next = nfsd->nd_mrep; 1342 owp->nd_eoff = nfsd->nd_eoff; 1343 } else 1344 m_freem(nfsd->nd_mrep); 1345 nfsd->nd_mrep = NULL; 1346 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1347 owp->nd_stable = NFSV3WRITE_FILESYNC; 1348 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1349 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1350 owp->nd_stable = NFSV3WRITE_DATASYNC; 1351 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1352 /* 1353 * nfsd might hold coalesce elements! Move them to owp. 1354 * Otherwise, requests may be lost and clients will be stuck. 1355 */ 1356 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1357 LIST_REMOVE(m, nd_tq); 1358 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1359 } 1360 } 1361 1362 /* 1363 * nfs create service 1364 * now does a truncate to 0 length via. setattr if it already exists 1365 */ 1366 int 1367 nfsrv_create(nfsd, slp, lwp, mrq) 1368 struct nfsrv_descript *nfsd; 1369 struct nfssvc_sock *slp; 1370 struct lwp *lwp; 1371 struct mbuf **mrq; 1372 { 1373 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1374 struct mbuf *nam = nfsd->nd_nam; 1375 char *dpos = nfsd->nd_dpos; 1376 kauth_cred_t cred = nfsd->nd_cr; 1377 struct nfs_fattr *fp; 1378 struct vattr va, dirfor, diraft; 1379 struct nfsv2_sattr *sp; 1380 u_int32_t *tl; 1381 struct nameidata nd; 1382 char *cp; 1383 int32_t t1; 1384 char *bpos; 1385 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1386 int rdev = 0; 1387 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1388 char *cp2; 1389 struct mbuf *mb, *mreq; 1390 struct vnode *vp = NULL, *dirp = NULL; 1391 nfsrvfh_t nsfh; 1392 u_quad_t frev, tempsize; 1393 u_char cverf[NFSX_V3CREATEVERF]; 1394 1395 nd.ni_cnd.cn_nameiop = 0; 1396 nfsm_srvmtofh(&nsfh); 1397 nfsm_srvnamesiz(len); 1398 nd.ni_cnd.cn_cred = cred; 1399 nd.ni_cnd.cn_nameiop = CREATE; 1400 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1401 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1402 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1403 if (dirp && v3) { 1404 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1405 } 1406 if (error) { 1407 nfsm_reply(NFSX_WCCDATA(v3)); 1408 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1409 if (dirp) 1410 vrele(dirp); 1411 return (0); 1412 } 1413 VATTR_NULL(&va); 1414 if (v3) { 1415 va.va_mode = 0; 1416 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1417 how = fxdr_unsigned(int, *tl); 1418 switch (how) { 1419 case NFSV3CREATE_GUARDED: 1420 if (nd.ni_vp) { 1421 error = EEXIST; 1422 break; 1423 } 1424 case NFSV3CREATE_UNCHECKED: 1425 nfsm_srvsattr(&va); 1426 break; 1427 case NFSV3CREATE_EXCLUSIVE: 1428 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1429 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1430 exclusive_flag = 1; 1431 break; 1432 }; 1433 va.va_type = VREG; 1434 } else { 1435 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1436 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1437 if (va.va_type == VNON) 1438 va.va_type = VREG; 1439 va.va_mode = nfstov_mode(sp->sa_mode); 1440 switch (va.va_type) { 1441 case VREG: 1442 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1443 if (tsize != -1) 1444 va.va_size = (u_quad_t)tsize; 1445 break; 1446 case VCHR: 1447 case VBLK: 1448 case VFIFO: 1449 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1450 break; 1451 default: 1452 break; 1453 }; 1454 } 1455 1456 /* 1457 * Iff doesn't exist, create it 1458 * otherwise just truncate to 0 length 1459 * should I set the mode too ?? 1460 */ 1461 if (nd.ni_vp == NULL) { 1462 if (va.va_type == VREG || va.va_type == VSOCK) { 1463 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1464 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1465 if (!error) { 1466 if (exclusive_flag) { 1467 exclusive_flag = 0; 1468 VATTR_NULL(&va); 1469 /* 1470 * XXX 1471 * assuming NFSX_V3CREATEVERF 1472 * == sizeof(nfstime3) 1473 */ 1474 fxdr_nfsv3time(cverf, &va.va_atime); 1475 error = VOP_SETATTR(nd.ni_vp, &va, 1476 cred); 1477 } 1478 } 1479 } else if (va.va_type == VCHR || va.va_type == VBLK || 1480 va.va_type == VFIFO) { 1481 if (va.va_type == VCHR && rdev == 0xffffffff) 1482 va.va_type = VFIFO; 1483 if (va.va_type != VFIFO && 1484 (error = kauth_authorize_generic(cred, 1485 KAUTH_GENERIC_ISSUSER, NULL))) { 1486 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1487 vput(nd.ni_dvp); 1488 nfsm_reply(0); 1489 return (error); 1490 } else 1491 va.va_rdev = (dev_t)rdev; 1492 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1493 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1494 &va); 1495 if (error) { 1496 nfsm_reply(0); 1497 } 1498 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1499 vput(nd.ni_vp); 1500 vrele(nd.ni_dvp); 1501 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1502 error = EINVAL; 1503 nfsm_reply(0); 1504 } 1505 } else { 1506 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1507 vput(nd.ni_dvp); 1508 error = ENXIO; 1509 } 1510 vp = nd.ni_vp; 1511 } else { 1512 vp = nd.ni_vp; 1513 if (nd.ni_dvp == vp) 1514 vrele(nd.ni_dvp); 1515 else 1516 vput(nd.ni_dvp); 1517 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1518 if (!error && va.va_size != -1) { 1519 error = nfsrv_access(vp, VWRITE, cred, 1520 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1521 if (!error) { 1522 nqsrv_getl(vp, ND_WRITE); 1523 tempsize = va.va_size; 1524 VATTR_NULL(&va); 1525 va.va_size = tempsize; 1526 error = VOP_SETATTR(vp, &va, cred); 1527 } 1528 } 1529 if (error) 1530 vput(vp); 1531 } 1532 if (!error) { 1533 error = nfsrv_composefh(vp, &nsfh, v3); 1534 if (!error) 1535 error = VOP_GETATTR(vp, &va, cred); 1536 vput(vp); 1537 } 1538 if (v3) { 1539 if (exclusive_flag && !error) { 1540 /* 1541 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1542 */ 1543 char oldverf[NFSX_V3CREATEVERF]; 1544 1545 txdr_nfsv3time(&va.va_atime, oldverf); 1546 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1547 error = EEXIST; 1548 } 1549 if (dirp) { 1550 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1551 } 1552 } 1553 if (dirp) { 1554 vrele(dirp); 1555 } 1556 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1557 if (v3) { 1558 if (!error) { 1559 nfsm_srvpostop_fh(&nsfh); 1560 nfsm_srvpostop_attr(0, &va); 1561 } 1562 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1563 } else { 1564 nfsm_srvfhtom(&nsfh, v3); 1565 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1566 nfsm_srvfillattr(&va, fp); 1567 } 1568 return (0); 1569 nfsmout: 1570 if (dirp) 1571 vrele(dirp); 1572 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1573 if (nd.ni_dvp == nd.ni_vp) 1574 vrele(nd.ni_dvp); 1575 else 1576 vput(nd.ni_dvp); 1577 if (nd.ni_vp) 1578 vput(nd.ni_vp); 1579 return (error); 1580 } 1581 1582 /* 1583 * nfs v3 mknod service 1584 */ 1585 int 1586 nfsrv_mknod(nfsd, slp, lwp, mrq) 1587 struct nfsrv_descript *nfsd; 1588 struct nfssvc_sock *slp; 1589 struct lwp *lwp; 1590 struct mbuf **mrq; 1591 { 1592 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1593 struct mbuf *nam = nfsd->nd_nam; 1594 char *dpos = nfsd->nd_dpos; 1595 kauth_cred_t cred = nfsd->nd_cr; 1596 struct vattr va, dirfor, diraft; 1597 u_int32_t *tl; 1598 struct nameidata nd; 1599 int32_t t1; 1600 char *bpos; 1601 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1602 u_int32_t major, minor; 1603 enum vtype vtyp; 1604 char *cp2; 1605 struct mbuf *mb, *mreq; 1606 struct vnode *vp, *dirp = (struct vnode *)0; 1607 nfsrvfh_t nsfh; 1608 u_quad_t frev; 1609 1610 nd.ni_cnd.cn_nameiop = 0; 1611 nfsm_srvmtofh(&nsfh); 1612 nfsm_srvnamesiz(len); 1613 nd.ni_cnd.cn_cred = cred; 1614 nd.ni_cnd.cn_nameiop = CREATE; 1615 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1616 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1617 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1618 if (dirp) 1619 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1620 if (error) { 1621 nfsm_reply(NFSX_WCCDATA(1)); 1622 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1623 if (dirp) 1624 vrele(dirp); 1625 return (0); 1626 } 1627 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1628 vtyp = nfsv3tov_type(*tl); 1629 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1630 error = NFSERR_BADTYPE; 1631 goto abort; 1632 } 1633 VATTR_NULL(&va); 1634 va.va_mode = 0; 1635 nfsm_srvsattr(&va); 1636 if (vtyp == VCHR || vtyp == VBLK) { 1637 dev_t rdev; 1638 1639 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1640 major = fxdr_unsigned(u_int32_t, *tl++); 1641 minor = fxdr_unsigned(u_int32_t, *tl); 1642 rdev = makedev(major, minor); 1643 if (major(rdev) != major || minor(rdev) != minor) { 1644 error = EINVAL; 1645 goto abort; 1646 } 1647 va.va_rdev = rdev; 1648 } 1649 1650 /* 1651 * Iff doesn't exist, create it. 1652 */ 1653 if (nd.ni_vp) { 1654 error = EEXIST; 1655 abort: 1656 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1657 if (nd.ni_dvp == nd.ni_vp) 1658 vrele(nd.ni_dvp); 1659 else 1660 vput(nd.ni_dvp); 1661 if (nd.ni_vp) 1662 vput(nd.ni_vp); 1663 goto out; 1664 } 1665 va.va_type = vtyp; 1666 if (vtyp == VSOCK) { 1667 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1668 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1669 } else { 1670 if (va.va_type != VFIFO && 1671 (error = kauth_authorize_generic(cred, 1672 KAUTH_GENERIC_ISSUSER, NULL))) { 1673 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1674 vput(nd.ni_dvp); 1675 goto out; 1676 } 1677 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1678 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1679 if (error) 1680 goto out; 1681 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1682 vput(nd.ni_vp); 1683 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1684 error = EINVAL; 1685 } 1686 } 1687 out: 1688 vp = nd.ni_vp; 1689 if (!error) { 1690 error = nfsrv_composefh(vp, &nsfh, true); 1691 if (!error) 1692 error = VOP_GETATTR(vp, &va, cred); 1693 vput(vp); 1694 } 1695 if (dirp) { 1696 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1697 vrele(dirp); 1698 } 1699 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1700 NFSX_WCCDATA(1)); 1701 if (!error) { 1702 nfsm_srvpostop_fh(&nsfh); 1703 nfsm_srvpostop_attr(0, &va); 1704 } 1705 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1706 return (0); 1707 nfsmout: 1708 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1709 if (nd.ni_dvp == nd.ni_vp) 1710 vrele(nd.ni_dvp); 1711 else 1712 vput(nd.ni_dvp); 1713 if (nd.ni_vp) 1714 vput(nd.ni_vp); 1715 if (dirp) 1716 vrele(dirp); 1717 return (error); 1718 } 1719 1720 /* 1721 * nfs remove service 1722 */ 1723 int 1724 nfsrv_remove(nfsd, slp, lwp, mrq) 1725 struct nfsrv_descript *nfsd; 1726 struct nfssvc_sock *slp; 1727 struct lwp *lwp; 1728 struct mbuf **mrq; 1729 { 1730 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1731 struct mbuf *nam = nfsd->nd_nam; 1732 char *dpos = nfsd->nd_dpos; 1733 kauth_cred_t cred = nfsd->nd_cr; 1734 struct nameidata nd; 1735 u_int32_t *tl; 1736 int32_t t1; 1737 char *bpos; 1738 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1739 int v3 = (nfsd->nd_flag & ND_NFSV3); 1740 char *cp2; 1741 struct mbuf *mb, *mreq; 1742 struct vnode *vp, *dirp; 1743 struct vattr dirfor, diraft; 1744 nfsrvfh_t nsfh; 1745 u_quad_t frev; 1746 1747 #ifndef nolint 1748 vp = (struct vnode *)0; 1749 #endif 1750 nfsm_srvmtofh(&nsfh); 1751 nfsm_srvnamesiz(len); 1752 nd.ni_cnd.cn_cred = cred; 1753 nd.ni_cnd.cn_nameiop = DELETE; 1754 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1755 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1756 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1757 if (dirp && v3) { 1758 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1759 } 1760 if (!error) { 1761 vp = nd.ni_vp; 1762 if (vp->v_type == VDIR && 1763 (error = kauth_authorize_generic(cred, 1764 KAUTH_GENERIC_ISSUSER, NULL)) != 0) 1765 goto out; 1766 /* 1767 * The root of a mounted filesystem cannot be deleted. 1768 */ 1769 if (vp->v_vflag & VV_ROOT) { 1770 error = EBUSY; 1771 goto out; 1772 } 1773 out: 1774 if (!error) { 1775 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1776 nqsrv_getl(vp, ND_WRITE); 1777 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1778 } else { 1779 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1780 if (nd.ni_dvp == vp) 1781 vrele(nd.ni_dvp); 1782 else 1783 vput(nd.ni_dvp); 1784 vput(vp); 1785 } 1786 } 1787 if (dirp) { 1788 if (v3) { 1789 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1790 } 1791 vrele(dirp); 1792 } 1793 nfsm_reply(NFSX_WCCDATA(v3)); 1794 if (v3) { 1795 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1796 return (0); 1797 } 1798 nfsm_srvdone; 1799 } 1800 1801 /* 1802 * nfs rename service 1803 */ 1804 int 1805 nfsrv_rename(nfsd, slp, lwp, mrq) 1806 struct nfsrv_descript *nfsd; 1807 struct nfssvc_sock *slp; 1808 struct lwp *lwp; 1809 struct mbuf **mrq; 1810 { 1811 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1812 struct mbuf *nam = nfsd->nd_nam; 1813 char *dpos = nfsd->nd_dpos; 1814 kauth_cred_t cred = nfsd->nd_cr; 1815 u_int32_t *tl; 1816 int32_t t1; 1817 char *bpos; 1818 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1819 uint32_t len, len2; 1820 int tdirfor_ret = 1, tdiraft_ret = 1; 1821 int v3 = (nfsd->nd_flag & ND_NFSV3); 1822 char *cp2; 1823 struct mbuf *mb, *mreq; 1824 struct nameidata fromnd, tond; 1825 struct vnode *fvp, *tvp, *tdvp; 1826 struct vnode *fdirp = NULL, *tdirp = NULL; 1827 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1828 nfsrvfh_t fnsfh, tnsfh; 1829 u_quad_t frev; 1830 uid_t saved_uid; 1831 1832 #ifndef nolint 1833 fvp = (struct vnode *)0; 1834 #endif 1835 fromnd.ni_cnd.cn_nameiop = 0; 1836 tond.ni_cnd.cn_nameiop = 0; 1837 nfsm_srvmtofh(&fnsfh); 1838 nfsm_srvnamesiz(len); 1839 /* 1840 * Remember our original uid so that we can reset cr_uid before 1841 * the second nfs_namei() call, in case it is remapped. 1842 */ 1843 saved_uid = kauth_cred_geteuid(cred); 1844 fromnd.ni_cnd.cn_cred = cred; 1845 fromnd.ni_cnd.cn_nameiop = DELETE; 1846 fromnd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 1847 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1848 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1849 if (fdirp && v3) { 1850 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1851 } 1852 if (error) { 1853 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1854 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1855 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1856 if (fdirp) 1857 vrele(fdirp); 1858 return (0); 1859 } 1860 if (fromnd.ni_dvp != fromnd.ni_vp) { 1861 VOP_UNLOCK(fromnd.ni_dvp, 0); 1862 } 1863 fvp = fromnd.ni_vp; 1864 nfsm_srvmtofh(&tnsfh); 1865 if (v3) { 1866 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1867 len2 = fxdr_unsigned(uint32_t, *tl); 1868 /* len2 will be checked by nfs_namei */ 1869 } 1870 else { 1871 /* NFSv2 */ 1872 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1873 } 1874 kauth_cred_seteuid(cred, saved_uid); 1875 tond.ni_cnd.cn_cred = cred; 1876 tond.ni_cnd.cn_nameiop = RENAME; 1877 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1878 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 1879 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1880 if (tdirp && v3) { 1881 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 1882 } 1883 if (error) { 1884 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1885 vrele(fromnd.ni_dvp); 1886 vrele(fvp); 1887 goto out1; 1888 } 1889 tdvp = tond.ni_dvp; 1890 tvp = tond.ni_vp; 1891 if (tvp != NULL) { 1892 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1893 if (v3) 1894 error = EEXIST; 1895 else 1896 error = EISDIR; 1897 goto out; 1898 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1899 if (v3) 1900 error = EEXIST; 1901 else 1902 error = ENOTDIR; 1903 goto out; 1904 } 1905 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1906 if (v3) 1907 error = EXDEV; 1908 else 1909 error = ENOTEMPTY; 1910 goto out; 1911 } 1912 } 1913 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1914 if (v3) 1915 error = EXDEV; 1916 else 1917 error = ENOTEMPTY; 1918 goto out; 1919 } 1920 if (fvp->v_mount != tdvp->v_mount) { 1921 if (v3) 1922 error = EXDEV; 1923 else 1924 error = ENOTEMPTY; 1925 goto out; 1926 } 1927 if (fvp == tdvp) { 1928 if (v3) 1929 error = EINVAL; 1930 else 1931 error = ENOTEMPTY; 1932 } 1933 /* 1934 * If source is the same as the destination (that is the 1935 * same vnode with the same name in the same directory), 1936 * then there is nothing to do. 1937 */ 1938 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1939 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1940 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1941 fromnd.ni_cnd.cn_namelen)) 1942 error = -1; 1943 out: 1944 if (!error) { 1945 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1946 nqsrv_getl(tdvp, ND_WRITE); 1947 if (tvp) { 1948 nqsrv_getl(tvp, ND_WRITE); 1949 } 1950 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1951 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1952 } else { 1953 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1954 if (tdvp == tvp) 1955 vrele(tdvp); 1956 else 1957 vput(tdvp); 1958 if (tvp) 1959 vput(tvp); 1960 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1961 vrele(fromnd.ni_dvp); 1962 vrele(fvp); 1963 if (error == -1) 1964 error = 0; 1965 } 1966 vrele(tond.ni_startdir); 1967 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 1968 out1: 1969 if (fdirp) { 1970 if (v3) { 1971 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 1972 } 1973 vrele(fdirp); 1974 } 1975 if (tdirp) { 1976 if (v3) { 1977 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 1978 } 1979 vrele(tdirp); 1980 } 1981 vrele(fromnd.ni_startdir); 1982 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 1983 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1984 if (v3) { 1985 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1986 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1987 } 1988 return (0); 1989 1990 nfsmout: 1991 if (fdirp) 1992 vrele(fdirp); 1993 #ifdef notdef 1994 if (tdirp) 1995 vrele(tdirp); 1996 #endif 1997 if (tond.ni_cnd.cn_nameiop) { 1998 vrele(tond.ni_startdir); 1999 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2000 } 2001 if (fromnd.ni_cnd.cn_nameiop) { 2002 vrele(fromnd.ni_startdir); 2003 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2004 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2005 vrele(fromnd.ni_dvp); 2006 vrele(fvp); 2007 } 2008 return (error); 2009 } 2010 2011 /* 2012 * nfs link service 2013 */ 2014 int 2015 nfsrv_link(nfsd, slp, lwp, mrq) 2016 struct nfsrv_descript *nfsd; 2017 struct nfssvc_sock *slp; 2018 struct lwp *lwp; 2019 struct mbuf **mrq; 2020 { 2021 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2022 struct mbuf *nam = nfsd->nd_nam; 2023 char *dpos = nfsd->nd_dpos; 2024 kauth_cred_t cred = nfsd->nd_cr; 2025 struct nameidata nd; 2026 u_int32_t *tl; 2027 int32_t t1; 2028 char *bpos; 2029 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2030 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2031 char *cp2; 2032 struct mbuf *mb, *mreq; 2033 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2034 struct vattr dirfor, diraft, at; 2035 nfsrvfh_t nsfh, dnsfh; 2036 u_quad_t frev; 2037 2038 nfsm_srvmtofh(&nsfh); 2039 nfsm_srvmtofh(&dnsfh); 2040 nfsm_srvnamesiz(len); 2041 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2042 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2043 if (error) { 2044 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2045 nfsm_srvpostop_attr(getret, &at); 2046 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2047 return (0); 2048 } 2049 if (vp->v_type == VDIR && (error = kauth_authorize_generic(cred, 2050 KAUTH_GENERIC_ISSUSER, NULL)) != 0) 2051 goto out1; 2052 nd.ni_cnd.cn_cred = cred; 2053 nd.ni_cnd.cn_nameiop = CREATE; 2054 nd.ni_cnd.cn_flags = LOCKPARENT; 2055 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2056 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2057 if (dirp && v3) { 2058 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2059 } 2060 if (error) 2061 goto out1; 2062 xp = nd.ni_vp; 2063 if (xp != NULL) { 2064 error = EEXIST; 2065 goto out; 2066 } 2067 xp = nd.ni_dvp; 2068 if (vp->v_mount != xp->v_mount) 2069 error = EXDEV; 2070 out: 2071 if (!error) { 2072 nqsrv_getl(vp, ND_WRITE); 2073 nqsrv_getl(xp, ND_WRITE); 2074 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2075 } else { 2076 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2077 if (nd.ni_dvp == nd.ni_vp) 2078 vrele(nd.ni_dvp); 2079 else 2080 vput(nd.ni_dvp); 2081 if (nd.ni_vp) 2082 vrele(nd.ni_vp); 2083 } 2084 out1: 2085 if (v3) 2086 getret = VOP_GETATTR(vp, &at, cred); 2087 if (dirp) { 2088 if (v3) { 2089 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2090 } 2091 vrele(dirp); 2092 } 2093 vrele(vp); 2094 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2095 if (v3) { 2096 nfsm_srvpostop_attr(getret, &at); 2097 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2098 return (0); 2099 } 2100 nfsm_srvdone; 2101 } 2102 2103 /* 2104 * nfs symbolic link service 2105 */ 2106 int 2107 nfsrv_symlink(nfsd, slp, lwp, mrq) 2108 struct nfsrv_descript *nfsd; 2109 struct nfssvc_sock *slp; 2110 struct lwp *lwp; 2111 struct mbuf **mrq; 2112 { 2113 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2114 struct mbuf *nam = nfsd->nd_nam; 2115 char *dpos = nfsd->nd_dpos; 2116 kauth_cred_t cred = nfsd->nd_cr; 2117 struct vattr va, dirfor, diraft; 2118 struct nameidata nd; 2119 u_int32_t *tl; 2120 int32_t t1; 2121 struct nfsv2_sattr *sp; 2122 char *bpos, *pathcp = NULL, *cp2; 2123 struct uio io; 2124 struct iovec iv; 2125 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1; 2126 uint32_t len, len2; 2127 int v3 = (nfsd->nd_flag & ND_NFSV3); 2128 struct mbuf *mb, *mreq; 2129 struct vnode *dirp = (struct vnode *)0; 2130 nfsrvfh_t nsfh; 2131 u_quad_t frev; 2132 2133 nd.ni_cnd.cn_nameiop = 0; 2134 nfsm_srvmtofh(&nsfh); 2135 nfsm_srvnamesiz(len); 2136 nd.ni_cnd.cn_cred = cred; 2137 nd.ni_cnd.cn_nameiop = CREATE; 2138 nd.ni_cnd.cn_flags = LOCKPARENT; 2139 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2140 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2141 if (dirp && v3) { 2142 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2143 } 2144 if (error) 2145 goto out; 2146 VATTR_NULL(&va); 2147 va.va_type = VLNK; 2148 if (v3) { 2149 va.va_mode = 0; 2150 nfsm_srvsattr(&va); 2151 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2152 len2 = fxdr_unsigned(uint32_t, *tl); 2153 if (len2 > PATH_MAX) { 2154 /* XXX should check _PC_NO_TRUNC */ 2155 error = ENAMETOOLONG; 2156 goto abortop; 2157 } 2158 } 2159 else { 2160 /* NFSv2 */ 2161 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2162 } 2163 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2164 iv.iov_base = pathcp; 2165 iv.iov_len = len2; 2166 io.uio_resid = len2; 2167 io.uio_offset = 0; 2168 io.uio_iov = &iv; 2169 io.uio_iovcnt = 1; 2170 io.uio_rw = UIO_READ; 2171 UIO_SETUP_SYSSPACE(&io); 2172 nfsm_mtouio(&io, len2); 2173 if (!v3) { 2174 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2175 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2176 } 2177 *(pathcp + len2) = '\0'; 2178 if (nd.ni_vp) { 2179 error = EEXIST; 2180 abortop: 2181 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2182 if (nd.ni_dvp == nd.ni_vp) 2183 vrele(nd.ni_dvp); 2184 else 2185 vput(nd.ni_dvp); 2186 if (nd.ni_vp) 2187 vrele(nd.ni_vp); 2188 goto out; 2189 } 2190 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2191 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2192 if (!error) { 2193 if (v3) { 2194 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2195 if (!error) 2196 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2197 vput(nd.ni_vp); 2198 } else { 2199 vput(nd.ni_vp); 2200 } 2201 } 2202 out: 2203 if (pathcp) 2204 free(pathcp, M_TEMP); 2205 if (dirp) { 2206 if (v3) { 2207 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2208 } 2209 vrele(dirp); 2210 } 2211 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2212 NFSX_WCCDATA(v3)); 2213 if (v3) { 2214 if (!error) { 2215 nfsm_srvpostop_fh(&nsfh); 2216 nfsm_srvpostop_attr(0, &va); 2217 } 2218 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2219 } 2220 return (0); 2221 nfsmout: 2222 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2223 if (nd.ni_dvp == nd.ni_vp) 2224 vrele(nd.ni_dvp); 2225 else 2226 vput(nd.ni_dvp); 2227 if (nd.ni_vp) 2228 vrele(nd.ni_vp); 2229 if (dirp) 2230 vrele(dirp); 2231 if (pathcp) 2232 free(pathcp, M_TEMP); 2233 return (error); 2234 } 2235 2236 /* 2237 * nfs mkdir service 2238 */ 2239 int 2240 nfsrv_mkdir(nfsd, slp, lwp, mrq) 2241 struct nfsrv_descript *nfsd; 2242 struct nfssvc_sock *slp; 2243 struct lwp *lwp; 2244 struct mbuf **mrq; 2245 { 2246 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2247 struct mbuf *nam = nfsd->nd_nam; 2248 char *dpos = nfsd->nd_dpos; 2249 kauth_cred_t cred = nfsd->nd_cr; 2250 struct vattr va, dirfor, diraft; 2251 struct nfs_fattr *fp; 2252 struct nameidata nd; 2253 char *cp; 2254 u_int32_t *tl; 2255 int32_t t1; 2256 char *bpos; 2257 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2258 int v3 = (nfsd->nd_flag & ND_NFSV3); 2259 char *cp2; 2260 struct mbuf *mb, *mreq; 2261 struct vnode *vp, *dirp = (struct vnode *)0; 2262 nfsrvfh_t nsfh; 2263 u_quad_t frev; 2264 2265 nfsm_srvmtofh(&nsfh); 2266 nfsm_srvnamesiz(len); 2267 nd.ni_cnd.cn_cred = cred; 2268 nd.ni_cnd.cn_nameiop = CREATE; 2269 nd.ni_cnd.cn_flags = LOCKPARENT; 2270 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2271 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2272 if (dirp && v3) { 2273 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2274 } 2275 if (error) { 2276 nfsm_reply(NFSX_WCCDATA(v3)); 2277 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2278 if (dirp) 2279 vrele(dirp); 2280 return (0); 2281 } 2282 VATTR_NULL(&va); 2283 if (v3) { 2284 va.va_mode = 0; 2285 nfsm_srvsattr(&va); 2286 } else { 2287 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2288 va.va_mode = nfstov_mode(*tl++); 2289 } 2290 va.va_type = VDIR; 2291 vp = nd.ni_vp; 2292 if (vp != NULL) { 2293 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2294 if (nd.ni_dvp == vp) 2295 vrele(nd.ni_dvp); 2296 else 2297 vput(nd.ni_dvp); 2298 vrele(vp); 2299 error = EEXIST; 2300 goto out; 2301 } 2302 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2303 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2304 if (!error) { 2305 vp = nd.ni_vp; 2306 error = nfsrv_composefh(vp, &nsfh, v3); 2307 if (!error) 2308 error = VOP_GETATTR(vp, &va, cred); 2309 vput(vp); 2310 } 2311 out: 2312 if (dirp) { 2313 if (v3) { 2314 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2315 } 2316 vrele(dirp); 2317 } 2318 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2319 NFSX_WCCDATA(v3)); 2320 if (v3) { 2321 if (!error) { 2322 nfsm_srvpostop_fh(&nsfh); 2323 nfsm_srvpostop_attr(0, &va); 2324 } 2325 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2326 } else { 2327 nfsm_srvfhtom(&nsfh, v3); 2328 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2329 nfsm_srvfillattr(&va, fp); 2330 } 2331 return (0); 2332 nfsmout: 2333 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2334 if (nd.ni_dvp == nd.ni_vp) 2335 vrele(nd.ni_dvp); 2336 else 2337 vput(nd.ni_dvp); 2338 if (nd.ni_vp) 2339 vrele(nd.ni_vp); 2340 if (dirp) 2341 vrele(dirp); 2342 return (error); 2343 } 2344 2345 /* 2346 * nfs rmdir service 2347 */ 2348 int 2349 nfsrv_rmdir(nfsd, slp, lwp, mrq) 2350 struct nfsrv_descript *nfsd; 2351 struct nfssvc_sock *slp; 2352 struct lwp *lwp; 2353 struct mbuf **mrq; 2354 { 2355 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2356 struct mbuf *nam = nfsd->nd_nam; 2357 char *dpos = nfsd->nd_dpos; 2358 kauth_cred_t cred = nfsd->nd_cr; 2359 u_int32_t *tl; 2360 int32_t t1; 2361 char *bpos; 2362 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2363 int v3 = (nfsd->nd_flag & ND_NFSV3); 2364 char *cp2; 2365 struct mbuf *mb, *mreq; 2366 struct vnode *vp, *dirp = (struct vnode *)0; 2367 struct vattr dirfor, diraft; 2368 nfsrvfh_t nsfh; 2369 struct nameidata nd; 2370 u_quad_t frev; 2371 2372 nfsm_srvmtofh(&nsfh); 2373 nfsm_srvnamesiz(len); 2374 nd.ni_cnd.cn_cred = cred; 2375 nd.ni_cnd.cn_nameiop = DELETE; 2376 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2377 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2378 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2379 if (dirp && v3) { 2380 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2381 } 2382 if (error) { 2383 nfsm_reply(NFSX_WCCDATA(v3)); 2384 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2385 if (dirp) 2386 vrele(dirp); 2387 return (0); 2388 } 2389 vp = nd.ni_vp; 2390 if (vp->v_type != VDIR) { 2391 error = ENOTDIR; 2392 goto out; 2393 } 2394 /* 2395 * No rmdir "." please. 2396 */ 2397 if (nd.ni_dvp == vp) { 2398 error = EINVAL; 2399 goto out; 2400 } 2401 /* 2402 * The root of a mounted filesystem cannot be deleted. 2403 */ 2404 if (vp->v_vflag & VV_ROOT) 2405 error = EBUSY; 2406 out: 2407 if (!error) { 2408 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2409 nqsrv_getl(vp, ND_WRITE); 2410 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2411 } else { 2412 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2413 if (nd.ni_dvp == nd.ni_vp) 2414 vrele(nd.ni_dvp); 2415 else 2416 vput(nd.ni_dvp); 2417 vput(vp); 2418 } 2419 if (dirp) { 2420 if (v3) { 2421 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2422 } 2423 vrele(dirp); 2424 } 2425 nfsm_reply(NFSX_WCCDATA(v3)); 2426 if (v3) { 2427 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2428 return (0); 2429 } 2430 nfsm_srvdone; 2431 } 2432 2433 /* 2434 * nfs readdir service 2435 * - mallocs what it thinks is enough to read 2436 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2437 * - calls VOP_READDIR() 2438 * - loops around building the reply 2439 * if the output generated exceeds count break out of loop 2440 * The nfsm_clget macro is used here so that the reply will be packed 2441 * tightly in mbuf clusters. 2442 * - it only knows that it has encountered eof when the VOP_READDIR() 2443 * reads nothing 2444 * - as such one readdir rpc will return eof false although you are there 2445 * and then the next will return eof 2446 * - it trims out records with d_fileno == 0 2447 * this doesn't matter for Unix clients, but they might confuse clients 2448 * for other os'. 2449 * - it trims out records with d_type == DT_WHT 2450 * these cannot be seen through NFS (unless we extend the protocol) 2451 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2452 * than requested, but this may not apply to all filesystems. For 2453 * example, client NFS does not { although it is never remote mounted 2454 * anyhow } 2455 * The alternate call nfsrv_readdirplus() does lookups as well. 2456 * PS: The NFS protocol spec. does not clarify what the "count" byte 2457 * argument is a count of.. just name strings and file id's or the 2458 * entire reply rpc or ... 2459 * I tried just file name and id sizes and it confused the Sun client, 2460 * so I am using the full rpc size now. The "paranoia.." comment refers 2461 * to including the status longwords that are not a part of the dir. 2462 * "entry" structures, but are in the rpc. 2463 */ 2464 2465 #define NFS_SRVDIRBLKSIZ 1024 2466 2467 struct flrep { 2468 nfsuint64 fl_off; 2469 u_int32_t fl_postopok; 2470 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2471 u_int32_t fl_fhok; 2472 u_int32_t fl_fhsize; 2473 }; 2474 2475 int 2476 nfsrv_readdir(nfsd, slp, lwp, mrq) 2477 struct nfsrv_descript *nfsd; 2478 struct nfssvc_sock *slp; 2479 struct lwp *lwp; 2480 struct mbuf **mrq; 2481 { 2482 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2483 struct mbuf *nam = nfsd->nd_nam; 2484 char *dpos = nfsd->nd_dpos; 2485 kauth_cred_t cred = nfsd->nd_cr; 2486 char *bp, *be; 2487 struct mbuf *mp; 2488 struct dirent *dp; 2489 char *cp; 2490 u_int32_t *tl; 2491 int32_t t1; 2492 char *bpos; 2493 struct mbuf *mb, *mreq, *mp2; 2494 char *cpos, *cend, *cp2, *rbuf; 2495 struct vnode *vp; 2496 struct vattr at; 2497 nfsrvfh_t nsfh; 2498 struct uio io; 2499 struct iovec iv; 2500 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2501 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2502 int v3 = (nfsd->nd_flag & ND_NFSV3); 2503 u_quad_t frev, off, toff, verf; 2504 off_t *cookies = NULL, *cookiep; 2505 nfsuint64 jar; 2506 2507 nfsm_srvmtofh(&nsfh); 2508 if (v3) { 2509 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2510 toff = fxdr_hyper(tl); 2511 tl += 2; 2512 verf = fxdr_hyper(tl); 2513 tl += 2; 2514 } else { 2515 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2516 toff = fxdr_unsigned(u_quad_t, *tl++); 2517 } 2518 off = toff; 2519 cnt = fxdr_unsigned(int, *tl); 2520 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2521 xfer = NFS_SRVMAXDATA(nfsd); 2522 if (siz > xfer) 2523 siz = xfer; 2524 fullsiz = siz; 2525 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2526 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2527 if (!error && vp->v_type != VDIR) { 2528 error = ENOTDIR; 2529 vput(vp); 2530 } 2531 if (error) { 2532 nfsm_reply(NFSX_UNSIGNED); 2533 nfsm_srvpostop_attr(getret, &at); 2534 return (0); 2535 } 2536 nqsrv_getl(vp, ND_READ); 2537 if (v3) { 2538 error = getret = VOP_GETATTR(vp, &at, cred); 2539 #ifdef NFS3_STRICTVERF 2540 /* 2541 * XXX This check is too strict for Solaris 2.5 clients. 2542 */ 2543 if (!error && toff && verf != at.va_filerev) 2544 error = NFSERR_BAD_COOKIE; 2545 #endif 2546 } 2547 if (!error) 2548 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2549 if (error) { 2550 vput(vp); 2551 nfsm_reply(NFSX_POSTOPATTR(v3)); 2552 nfsm_srvpostop_attr(getret, &at); 2553 return (0); 2554 } 2555 VOP_UNLOCK(vp, 0); 2556 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2557 again: 2558 iv.iov_base = rbuf; 2559 iv.iov_len = fullsiz; 2560 io.uio_iov = &iv; 2561 io.uio_iovcnt = 1; 2562 io.uio_offset = (off_t)off; 2563 io.uio_resid = fullsiz; 2564 io.uio_rw = UIO_READ; 2565 UIO_SETUP_SYSSPACE(&io); 2566 eofflag = 0; 2567 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2568 2569 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2570 2571 off = (off_t)io.uio_offset; 2572 if (!cookies && !error) 2573 error = NFSERR_PERM; 2574 if (v3) { 2575 getret = VOP_GETATTR(vp, &at, cred); 2576 if (!error) 2577 error = getret; 2578 } 2579 2580 VOP_UNLOCK(vp, 0); 2581 if (error) { 2582 vrele(vp); 2583 free((void *)rbuf, M_TEMP); 2584 if (cookies) 2585 free((void *)cookies, M_TEMP); 2586 nfsm_reply(NFSX_POSTOPATTR(v3)); 2587 nfsm_srvpostop_attr(getret, &at); 2588 return (0); 2589 } 2590 if (io.uio_resid) { 2591 siz -= io.uio_resid; 2592 2593 /* 2594 * If nothing read, return eof 2595 * rpc reply 2596 */ 2597 if (siz == 0) { 2598 vrele(vp); 2599 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2600 2 * NFSX_UNSIGNED); 2601 if (v3) { 2602 nfsm_srvpostop_attr(getret, &at); 2603 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2604 txdr_hyper(at.va_filerev, tl); 2605 tl += 2; 2606 } else 2607 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2608 *tl++ = nfs_false; 2609 *tl = nfs_true; 2610 free((void *)rbuf, M_TEMP); 2611 free((void *)cookies, M_TEMP); 2612 return (0); 2613 } 2614 } 2615 2616 /* 2617 * Check for degenerate cases of nothing useful read. 2618 * If so go try again 2619 */ 2620 cpos = rbuf; 2621 cend = rbuf + siz; 2622 dp = (struct dirent *)cpos; 2623 cookiep = cookies; 2624 2625 while (cpos < cend && ncookies > 0 && 2626 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2627 cpos += dp->d_reclen; 2628 dp = (struct dirent *)cpos; 2629 cookiep++; 2630 ncookies--; 2631 } 2632 if (cpos >= cend || ncookies == 0) { 2633 toff = off; 2634 siz = fullsiz; 2635 free(cookies, M_TEMP); 2636 cookies = NULL; 2637 goto again; 2638 } 2639 2640 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2641 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2642 if (v3) { 2643 nfsm_srvpostop_attr(getret, &at); 2644 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2645 txdr_hyper(at.va_filerev, tl); 2646 } 2647 mp = mp2 = mb; 2648 bp = bpos; 2649 be = bp + M_TRAILINGSPACE(mp); 2650 2651 /* Loop through the records and build reply */ 2652 while (cpos < cend && ncookies > 0) { 2653 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2654 nlen = dp->d_namlen; 2655 rem = nfsm_rndup(nlen)-nlen; 2656 len += (4 * NFSX_UNSIGNED + nlen + rem); 2657 if (v3) 2658 len += 2 * NFSX_UNSIGNED; 2659 if (len > cnt) { 2660 eofflag = 0; 2661 break; 2662 } 2663 /* 2664 * Build the directory record xdr from 2665 * the dirent entry. 2666 */ 2667 nfsm_clget; 2668 *tl = nfs_true; 2669 bp += NFSX_UNSIGNED; 2670 if (v3) { 2671 nfsm_clget; 2672 *tl = txdr_unsigned(dp->d_fileno >> 32); 2673 bp += NFSX_UNSIGNED; 2674 } 2675 nfsm_clget; 2676 *tl = txdr_unsigned(dp->d_fileno); 2677 bp += NFSX_UNSIGNED; 2678 nfsm_clget; 2679 *tl = txdr_unsigned(nlen); 2680 bp += NFSX_UNSIGNED; 2681 2682 /* And loop around copying the name */ 2683 xfer = nlen; 2684 cp = dp->d_name; 2685 while (xfer > 0) { 2686 nfsm_clget; 2687 if ((bp+xfer) > be) 2688 tsiz = be-bp; 2689 else 2690 tsiz = xfer; 2691 memcpy(bp, cp, tsiz); 2692 bp += tsiz; 2693 xfer -= tsiz; 2694 if (xfer > 0) 2695 cp += tsiz; 2696 } 2697 /* And null pad to an int32_t boundary */ 2698 for (i = 0; i < rem; i++) 2699 *bp++ = '\0'; 2700 nfsm_clget; 2701 2702 /* Finish off the record */ 2703 txdr_hyper(*cookiep, &jar); 2704 if (v3) { 2705 *tl = jar.nfsuquad[0]; 2706 bp += NFSX_UNSIGNED; 2707 nfsm_clget; 2708 } 2709 *tl = jar.nfsuquad[1]; 2710 bp += NFSX_UNSIGNED; 2711 } 2712 cpos += dp->d_reclen; 2713 dp = (struct dirent *)cpos; 2714 cookiep++; 2715 ncookies--; 2716 } 2717 vrele(vp); 2718 nfsm_clget; 2719 *tl = nfs_false; 2720 bp += NFSX_UNSIGNED; 2721 nfsm_clget; 2722 if (eofflag) 2723 *tl = nfs_true; 2724 else 2725 *tl = nfs_false; 2726 bp += NFSX_UNSIGNED; 2727 if (mp != mb) { 2728 if (bp < be) 2729 mp->m_len = bp - mtod(mp, char *); 2730 } else 2731 mp->m_len += bp - bpos; 2732 free((void *)rbuf, M_TEMP); 2733 free((void *)cookies, M_TEMP); 2734 nfsm_srvdone; 2735 } 2736 2737 int 2738 nfsrv_readdirplus(nfsd, slp, lwp, mrq) 2739 struct nfsrv_descript *nfsd; 2740 struct nfssvc_sock *slp; 2741 struct lwp *lwp; 2742 struct mbuf **mrq; 2743 { 2744 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2745 struct mbuf *nam = nfsd->nd_nam; 2746 char *dpos = nfsd->nd_dpos; 2747 kauth_cred_t cred = nfsd->nd_cr; 2748 char *bp, *be; 2749 struct mbuf *mp; 2750 struct dirent *dp; 2751 char *cp; 2752 u_int32_t *tl; 2753 int32_t t1; 2754 char *bpos; 2755 struct mbuf *mb, *mreq, *mp2; 2756 char *cpos, *cend, *cp2, *rbuf; 2757 struct vnode *vp, *nvp; 2758 struct flrep fl; 2759 nfsrvfh_t nsfh; 2760 struct uio io; 2761 struct iovec iv; 2762 struct vattr va, at, *vap = &va; 2763 struct nfs_fattr *fp; 2764 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2765 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2766 u_quad_t frev, off, toff, verf; 2767 off_t *cookies = NULL, *cookiep; 2768 2769 nfsm_srvmtofh(&nsfh); 2770 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2771 toff = fxdr_hyper(tl); 2772 tl += 2; 2773 verf = fxdr_hyper(tl); 2774 tl += 2; 2775 siz = fxdr_unsigned(int, *tl++); 2776 cnt = fxdr_unsigned(int, *tl); 2777 off = toff; 2778 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2779 xfer = NFS_SRVMAXDATA(nfsd); 2780 if (siz > xfer) 2781 siz = xfer; 2782 fullsiz = siz; 2783 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2784 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2785 if (!error && vp->v_type != VDIR) { 2786 error = ENOTDIR; 2787 vput(vp); 2788 } 2789 if (error) { 2790 nfsm_reply(NFSX_UNSIGNED); 2791 nfsm_srvpostop_attr(getret, &at); 2792 return (0); 2793 } 2794 error = getret = VOP_GETATTR(vp, &at, cred); 2795 #ifdef NFS3_STRICTVERF 2796 /* 2797 * XXX This check is too strict for Solaris 2.5 clients. 2798 */ 2799 if (!error && toff && verf != at.va_filerev) 2800 error = NFSERR_BAD_COOKIE; 2801 #endif 2802 if (!error) { 2803 nqsrv_getl(vp, ND_READ); 2804 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2805 } 2806 if (error) { 2807 vput(vp); 2808 nfsm_reply(NFSX_V3POSTOPATTR); 2809 nfsm_srvpostop_attr(getret, &at); 2810 return (0); 2811 } 2812 VOP_UNLOCK(vp, 0); 2813 2814 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2815 again: 2816 iv.iov_base = rbuf; 2817 iv.iov_len = fullsiz; 2818 io.uio_iov = &iv; 2819 io.uio_iovcnt = 1; 2820 io.uio_offset = (off_t)off; 2821 io.uio_resid = fullsiz; 2822 io.uio_rw = UIO_READ; 2823 UIO_SETUP_SYSSPACE(&io); 2824 eofflag = 0; 2825 2826 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2827 2828 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2829 2830 off = (u_quad_t)io.uio_offset; 2831 getret = VOP_GETATTR(vp, &at, cred); 2832 2833 VOP_UNLOCK(vp, 0); 2834 2835 /* 2836 * If the VGET operation doesn't work for this filesystem, 2837 * we can't support readdirplus. Returning NOTSUPP should 2838 * make clients fall back to plain readdir. 2839 * There's no need to check for VPTOFH as well, we wouldn't 2840 * even be here otherwise. 2841 */ 2842 if (!getret) { 2843 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2844 getret = (getret == EOPNOTSUPP) ? 2845 NFSERR_NOTSUPP : NFSERR_IO; 2846 else 2847 vput(nvp); 2848 } 2849 2850 if (!cookies && !error) 2851 error = NFSERR_PERM; 2852 if (!error) 2853 error = getret; 2854 if (error) { 2855 vrele(vp); 2856 if (cookies) 2857 free((void *)cookies, M_TEMP); 2858 free((void *)rbuf, M_TEMP); 2859 nfsm_reply(NFSX_V3POSTOPATTR); 2860 nfsm_srvpostop_attr(getret, &at); 2861 return (0); 2862 } 2863 if (io.uio_resid) { 2864 siz -= io.uio_resid; 2865 2866 /* 2867 * If nothing read, return eof 2868 * rpc reply 2869 */ 2870 if (siz == 0) { 2871 vrele(vp); 2872 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2873 2 * NFSX_UNSIGNED); 2874 nfsm_srvpostop_attr(getret, &at); 2875 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2876 txdr_hyper(at.va_filerev, tl); 2877 tl += 2; 2878 *tl++ = nfs_false; 2879 *tl = nfs_true; 2880 free((void *)cookies, M_TEMP); 2881 free((void *)rbuf, M_TEMP); 2882 return (0); 2883 } 2884 } 2885 2886 /* 2887 * Check for degenerate cases of nothing useful read. 2888 * If so go try again 2889 */ 2890 cpos = rbuf; 2891 cend = rbuf + siz; 2892 dp = (struct dirent *)cpos; 2893 cookiep = cookies; 2894 2895 while (cpos < cend && ncookies > 0 && 2896 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2897 cpos += dp->d_reclen; 2898 dp = (struct dirent *)cpos; 2899 cookiep++; 2900 ncookies--; 2901 } 2902 if (cpos >= cend || ncookies == 0) { 2903 toff = off; 2904 siz = fullsiz; 2905 free(cookies, M_TEMP); 2906 cookies = NULL; 2907 goto again; 2908 } 2909 2910 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2911 nfsm_reply(cnt); 2912 nfsm_srvpostop_attr(getret, &at); 2913 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2914 txdr_hyper(at.va_filerev, tl); 2915 mp = mp2 = mb; 2916 bp = bpos; 2917 be = bp + M_TRAILINGSPACE(mp); 2918 2919 /* Loop through the records and build reply */ 2920 while (cpos < cend && ncookies > 0) { 2921 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2922 nfsrvfh_t nnsfh; 2923 2924 nlen = dp->d_namlen; 2925 rem = nfsm_rndup(nlen)-nlen; 2926 2927 /* 2928 * For readdir_and_lookup get the vnode using 2929 * the file number. 2930 */ 2931 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2932 goto invalid; 2933 if (nfsrv_composefh(nvp, &nnsfh, true)) { 2934 vput(nvp); 2935 goto invalid; 2936 } 2937 if (VOP_GETATTR(nvp, vap, cred)) { 2938 vput(nvp); 2939 goto invalid; 2940 } 2941 vput(nvp); 2942 2943 /* 2944 * If either the dircount or maxcount will be 2945 * exceeded, get out now. Both of these lengths 2946 * are calculated conservatively, including all 2947 * XDR overheads. 2948 */ 2949 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 2950 NFSX_V3POSTOPATTR); 2951 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 2952 if (len > cnt || dirlen > fullsiz) { 2953 eofflag = 0; 2954 break; 2955 } 2956 2957 /* 2958 * Build the directory record xdr from 2959 * the dirent entry. 2960 */ 2961 fp = (struct nfs_fattr *)&fl.fl_fattr; 2962 nfsm_srvfillattr(vap, fp); 2963 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 2964 fl.fl_fhok = nfs_true; 2965 fl.fl_postopok = nfs_true; 2966 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 2967 2968 nfsm_clget; 2969 *tl = nfs_true; 2970 bp += NFSX_UNSIGNED; 2971 nfsm_clget; 2972 *tl = txdr_unsigned(dp->d_fileno >> 32); 2973 bp += NFSX_UNSIGNED; 2974 nfsm_clget; 2975 *tl = txdr_unsigned(dp->d_fileno); 2976 bp += NFSX_UNSIGNED; 2977 nfsm_clget; 2978 *tl = txdr_unsigned(nlen); 2979 bp += NFSX_UNSIGNED; 2980 2981 /* And loop around copying the name */ 2982 xfer = nlen; 2983 cp = dp->d_name; 2984 while (xfer > 0) { 2985 nfsm_clget; 2986 if ((bp + xfer) > be) 2987 tsiz = be - bp; 2988 else 2989 tsiz = xfer; 2990 memcpy(bp, cp, tsiz); 2991 bp += tsiz; 2992 xfer -= tsiz; 2993 if (xfer > 0) 2994 cp += tsiz; 2995 } 2996 /* And null pad to an int32_t boundary */ 2997 for (i = 0; i < rem; i++) 2998 *bp++ = '\0'; 2999 3000 /* 3001 * Now copy the flrep structure out. 3002 */ 3003 xfer = sizeof(struct flrep); 3004 cp = (void *)&fl; 3005 while (xfer > 0) { 3006 nfsm_clget; 3007 if ((bp + xfer) > be) 3008 tsiz = be - bp; 3009 else 3010 tsiz = xfer; 3011 memcpy(bp, cp, tsiz); 3012 bp += tsiz; 3013 xfer -= tsiz; 3014 if (xfer > 0) 3015 cp += tsiz; 3016 } 3017 3018 /* 3019 * ... and filehandle. 3020 */ 3021 xfer = NFSRVFH_SIZE(&nnsfh); 3022 cp = NFSRVFH_DATA(&nnsfh); 3023 while (xfer > 0) { 3024 nfsm_clget; 3025 if ((bp + xfer) > be) 3026 tsiz = be - bp; 3027 else 3028 tsiz = xfer; 3029 memcpy(bp, cp, tsiz); 3030 bp += tsiz; 3031 xfer -= tsiz; 3032 if (xfer > 0) 3033 cp += tsiz; 3034 } 3035 } 3036 invalid: 3037 cpos += dp->d_reclen; 3038 dp = (struct dirent *)cpos; 3039 cookiep++; 3040 ncookies--; 3041 } 3042 vrele(vp); 3043 nfsm_clget; 3044 *tl = nfs_false; 3045 bp += NFSX_UNSIGNED; 3046 nfsm_clget; 3047 if (eofflag) 3048 *tl = nfs_true; 3049 else 3050 *tl = nfs_false; 3051 bp += NFSX_UNSIGNED; 3052 if (mp != mb) { 3053 if (bp < be) 3054 mp->m_len = bp - mtod(mp, char *); 3055 } else 3056 mp->m_len += bp - bpos; 3057 free((void *)cookies, M_TEMP); 3058 free((void *)rbuf, M_TEMP); 3059 nfsm_srvdone; 3060 } 3061 3062 /* 3063 * nfs commit service 3064 */ 3065 int 3066 nfsrv_commit(nfsd, slp, lwp, mrq) 3067 struct nfsrv_descript *nfsd; 3068 struct nfssvc_sock *slp; 3069 struct lwp *lwp; 3070 struct mbuf **mrq; 3071 { 3072 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3073 struct mbuf *nam = nfsd->nd_nam; 3074 char *dpos = nfsd->nd_dpos; 3075 kauth_cred_t cred = nfsd->nd_cr; 3076 struct vattr bfor, aft; 3077 struct vnode *vp; 3078 nfsrvfh_t nsfh; 3079 u_int32_t *tl; 3080 int32_t t1; 3081 char *bpos; 3082 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3083 uint32_t cnt; 3084 char *cp2; 3085 struct mbuf *mb, *mreq; 3086 u_quad_t frev, off, end; 3087 3088 nfsm_srvmtofh(&nsfh); 3089 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3090 3091 off = fxdr_hyper(tl); 3092 tl += 2; 3093 cnt = fxdr_unsigned(uint32_t, *tl); 3094 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3095 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3096 if (error) { 3097 nfsm_reply(2 * NFSX_UNSIGNED); 3098 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3099 return (0); 3100 } 3101 for_ret = VOP_GETATTR(vp, &bfor, cred); 3102 end = (cnt > 0) ? off + cnt : vp->v_size; 3103 if (end < off || end > vp->v_size) 3104 end = vp->v_size; 3105 if (off < vp->v_size) 3106 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3107 /* else error == 0, from nfsrv_fhtovp() */ 3108 aft_ret = VOP_GETATTR(vp, &aft, cred); 3109 vput(vp); 3110 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3111 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3112 if (!error) { 3113 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3114 *tl++ = txdr_unsigned(boottime.tv_sec); 3115 *tl = txdr_unsigned(boottime.tv_usec); 3116 } else { 3117 return (0); 3118 } 3119 nfsm_srvdone; 3120 } 3121 3122 /* 3123 * nfs statfs service 3124 */ 3125 int 3126 nfsrv_statfs(nfsd, slp, lwp, mrq) 3127 struct nfsrv_descript *nfsd; 3128 struct nfssvc_sock *slp; 3129 struct lwp *lwp; 3130 struct mbuf **mrq; 3131 { 3132 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3133 struct mbuf *nam = nfsd->nd_nam; 3134 char *dpos = nfsd->nd_dpos; 3135 kauth_cred_t cred = nfsd->nd_cr; 3136 struct statvfs *sf = NULL; 3137 struct nfs_statfs *sfp; 3138 u_int32_t *tl; 3139 int32_t t1; 3140 char *bpos; 3141 int error = 0, rdonly, cache = 0, getret = 1; 3142 int v3 = (nfsd->nd_flag & ND_NFSV3); 3143 char *cp2; 3144 struct mbuf *mb, *mreq; 3145 struct vnode *vp; 3146 struct vattr at; 3147 nfsrvfh_t nsfh; 3148 u_quad_t frev, tval; 3149 3150 nfsm_srvmtofh(&nsfh); 3151 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3152 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3153 if (error) { 3154 nfsm_reply(NFSX_UNSIGNED); 3155 nfsm_srvpostop_attr(getret, &at); 3156 return (0); 3157 } 3158 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3159 error = VFS_STATVFS(vp->v_mount, sf); 3160 getret = VOP_GETATTR(vp, &at, cred); 3161 vput(vp); 3162 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3163 if (v3) 3164 nfsm_srvpostop_attr(getret, &at); 3165 if (error) { 3166 free(sf, M_TEMP); 3167 return (0); 3168 } 3169 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3170 if (v3) { 3171 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3172 txdr_hyper(tval, &sfp->sf_tbytes); 3173 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3174 txdr_hyper(tval, &sfp->sf_fbytes); 3175 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3176 txdr_hyper(tval, &sfp->sf_abytes); 3177 tval = (u_quad_t)sf->f_files; 3178 txdr_hyper(tval, &sfp->sf_tfiles); 3179 tval = (u_quad_t)sf->f_ffree; 3180 txdr_hyper(tval, &sfp->sf_ffiles); 3181 txdr_hyper(tval, &sfp->sf_afiles); 3182 sfp->sf_invarsec = 0; 3183 } else { 3184 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3185 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3186 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3187 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3188 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3189 } 3190 nfsmout: 3191 if (sf) 3192 free(sf, M_TEMP); 3193 return error; 3194 } 3195 3196 /* 3197 * nfs fsinfo service 3198 */ 3199 int 3200 nfsrv_fsinfo(nfsd, slp, lwp, mrq) 3201 struct nfsrv_descript *nfsd; 3202 struct nfssvc_sock *slp; 3203 struct lwp *lwp; 3204 struct mbuf **mrq; 3205 { 3206 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3207 struct mbuf *nam = nfsd->nd_nam; 3208 char *dpos = nfsd->nd_dpos; 3209 kauth_cred_t cred = nfsd->nd_cr; 3210 u_int32_t *tl; 3211 struct nfsv3_fsinfo *sip; 3212 int32_t t1; 3213 char *bpos; 3214 int error = 0, rdonly, cache = 0, getret = 1; 3215 uint32_t maxdata; 3216 char *cp2; 3217 struct mbuf *mb, *mreq; 3218 struct vnode *vp; 3219 struct vattr at; 3220 nfsrvfh_t nsfh; 3221 u_quad_t frev, maxfsize; 3222 struct statvfs *sb; 3223 3224 nfsm_srvmtofh(&nsfh); 3225 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3226 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3227 if (error) { 3228 nfsm_reply(NFSX_UNSIGNED); 3229 nfsm_srvpostop_attr(getret, &at); 3230 return (0); 3231 } 3232 3233 /* XXX Try to make a guess on the max file size. */ 3234 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3235 VFS_STATVFS(vp->v_mount, sb); 3236 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3237 free(sb, M_TEMP); 3238 3239 getret = VOP_GETATTR(vp, &at, cred); 3240 vput(vp); 3241 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3242 nfsm_srvpostop_attr(getret, &at); 3243 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3244 3245 /* 3246 * XXX 3247 * There should be file system VFS OP(s) to get this information. 3248 * For now, assume ufs. 3249 */ 3250 if (slp->ns_so->so_type == SOCK_DGRAM) 3251 maxdata = NFS_MAXDGRAMDATA; 3252 else 3253 maxdata = NFS_MAXDATA; 3254 sip->fs_rtmax = txdr_unsigned(maxdata); 3255 sip->fs_rtpref = txdr_unsigned(maxdata); 3256 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3257 sip->fs_wtmax = txdr_unsigned(maxdata); 3258 sip->fs_wtpref = txdr_unsigned(maxdata); 3259 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3260 sip->fs_dtpref = txdr_unsigned(maxdata); 3261 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3262 sip->fs_timedelta.nfsv3_sec = 0; 3263 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3264 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3265 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3266 NFSV3FSINFO_CANSETTIME); 3267 nfsm_srvdone; 3268 } 3269 3270 /* 3271 * nfs pathconf service 3272 */ 3273 int 3274 nfsrv_pathconf(nfsd, slp, lwp, mrq) 3275 struct nfsrv_descript *nfsd; 3276 struct nfssvc_sock *slp; 3277 struct lwp *lwp; 3278 struct mbuf **mrq; 3279 { 3280 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3281 struct mbuf *nam = nfsd->nd_nam; 3282 char *dpos = nfsd->nd_dpos; 3283 kauth_cred_t cred = nfsd->nd_cr; 3284 u_int32_t *tl; 3285 struct nfsv3_pathconf *pc; 3286 int32_t t1; 3287 char *bpos; 3288 int error = 0, rdonly, cache = 0, getret = 1; 3289 register_t linkmax, namemax, chownres, notrunc; 3290 char *cp2; 3291 struct mbuf *mb, *mreq; 3292 struct vnode *vp; 3293 struct vattr at; 3294 nfsrvfh_t nsfh; 3295 u_quad_t frev; 3296 3297 nfsm_srvmtofh(&nsfh); 3298 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3299 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3300 if (error) { 3301 nfsm_reply(NFSX_UNSIGNED); 3302 nfsm_srvpostop_attr(getret, &at); 3303 return (0); 3304 } 3305 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3306 if (!error) 3307 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3308 if (!error) 3309 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3310 if (!error) 3311 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3312 getret = VOP_GETATTR(vp, &at, cred); 3313 vput(vp); 3314 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3315 nfsm_srvpostop_attr(getret, &at); 3316 if (error) 3317 return (0); 3318 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3319 3320 pc->pc_linkmax = txdr_unsigned(linkmax); 3321 pc->pc_namemax = txdr_unsigned(namemax); 3322 pc->pc_notrunc = txdr_unsigned(notrunc); 3323 pc->pc_chownrestricted = txdr_unsigned(chownres); 3324 3325 /* 3326 * These should probably be supported by VOP_PATHCONF(), but 3327 * until msdosfs is exportable (why would you want to?), the 3328 * Unix defaults should be ok. 3329 */ 3330 pc->pc_caseinsensitive = nfs_false; 3331 pc->pc_casepreserving = nfs_true; 3332 nfsm_srvdone; 3333 } 3334 3335 /* 3336 * Null operation, used by clients to ping server 3337 */ 3338 /* ARGSUSED */ 3339 int 3340 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3341 struct lwp *lwp, struct mbuf **mrq) 3342 { 3343 struct mbuf *mrep = nfsd->nd_mrep; 3344 char *bpos; 3345 int error = NFSERR_RETVOID, cache = 0; 3346 struct mbuf *mb, *mreq; 3347 u_quad_t frev; 3348 3349 nfsm_reply(0); 3350 return (0); 3351 } 3352 3353 /* 3354 * No operation, used for obsolete procedures 3355 */ 3356 /* ARGSUSED */ 3357 int 3358 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3359 struct lwp *lwp, struct mbuf **mrq) 3360 { 3361 struct mbuf *mrep = nfsd->nd_mrep; 3362 char *bpos; 3363 int error, cache = 0; 3364 struct mbuf *mb, *mreq; 3365 u_quad_t frev; 3366 3367 if (nfsd->nd_repstat) 3368 error = nfsd->nd_repstat; 3369 else 3370 error = EPROCUNAVAIL; 3371 nfsm_reply(0); 3372 return (0); 3373 } 3374 3375 /* 3376 * Perform access checking for vnodes obtained from file handles that would 3377 * refer to files already opened by a Unix client. You cannot just use 3378 * vn_writechk() and VOP_ACCESS() for two reasons. 3379 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3380 * 2 - The owner is to be given access irrespective of mode bits for some 3381 * operations, so that processes that chmod after opening a file don't 3382 * break. I don't like this because it opens a security hole, but since 3383 * the nfs server opens a security hole the size of a barn door anyhow, 3384 * what the heck. 3385 * 3386 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3387 * will return EPERM instead of EACCESS. EPERM is always an error. 3388 */ 3389 int 3390 nfsrv_access(vp, flags, cred, rdonly, lwp, override) 3391 struct vnode *vp; 3392 int flags; 3393 kauth_cred_t cred; 3394 int rdonly; 3395 struct lwp *lwp; 3396 int override; 3397 { 3398 struct vattr vattr; 3399 int error; 3400 if (flags & VWRITE) { 3401 /* Just vn_writechk() changed to check rdonly */ 3402 /* 3403 * Disallow write attempts on read-only file systems; 3404 * unless the file is a socket or a block or character 3405 * device resident on the file system. 3406 */ 3407 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3408 switch (vp->v_type) { 3409 case VREG: 3410 case VDIR: 3411 case VLNK: 3412 return (EROFS); 3413 default: 3414 break; 3415 } 3416 } 3417 3418 /* 3419 * If the vnode is in use as a process's text, 3420 * we can't allow writing. 3421 */ 3422 if (vp->v_iflag & VI_TEXT) 3423 return (ETXTBSY); 3424 } 3425 error = VOP_GETATTR(vp, &vattr, cred); 3426 if (error) 3427 return (error); 3428 error = VOP_ACCESS(vp, flags, cred); 3429 /* 3430 * Allow certain operations for the owner (reads and writes 3431 * on files that are already open). 3432 */ 3433 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3434 error = 0; 3435 return error; 3436 } 3437
Indexes created Sun Sep 21 20:09:37 GMT 2025