nfs_serv.c revision 1.126
1 /* $NetBSD: nfs_serv.c,v 1.126 2007/03/04 06:03:37 christos 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 1.126 2007/03/04 06:03:37 christos 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, lwp); 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, lwp); 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 struct mount *mp = NULL; 237 238 memset(&guard, 0, sizeof guard); /* XXX gcc */ 239 240 nfsm_srvmtofh(&nsfh); 241 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 242 return (ESTALE); 243 vn_start_write(NULL, &mp, V_WAIT); 244 VATTR_NULL(&va); 245 if (v3) { 246 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 247 gcheck = fxdr_unsigned(int, *tl); 248 if (gcheck) { 249 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 250 fxdr_nfsv3time(tl, &guard); 251 } 252 } else { 253 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 254 /* 255 * Nah nah nah nah na nah 256 * There is a bug in the Sun client that puts 0xffff in the mode 257 * field of sattr when it should put in 0xffffffff. The u_short 258 * doesn't sign extend. 259 * --> check the low order 2 bytes for 0xffff 260 */ 261 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 262 va.va_mode = nfstov_mode(sp->sa_mode); 263 if (sp->sa_uid != nfs_xdrneg1) 264 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 265 if (sp->sa_gid != nfs_xdrneg1) 266 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 267 if (sp->sa_size != nfs_xdrneg1) 268 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 269 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 270 #ifdef notyet 271 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 272 #else 273 va.va_atime.tv_sec = 274 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 275 va.va_atime.tv_nsec = 0; 276 #endif 277 } 278 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 279 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 280 281 } 282 283 /* 284 * Now that we have all the fields, lets do it. 285 */ 286 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 287 (nfsd->nd_flag & ND_KERBAUTH), false); 288 if (error) { 289 nfsm_reply(2 * NFSX_UNSIGNED); 290 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 291 vn_finished_write(mp, 0); 292 return (0); 293 } 294 nqsrv_getl(vp, ND_WRITE); 295 if (v3) { 296 error = preat_ret = VOP_GETATTR(vp, &preat, cred, lwp); 297 if (!error && gcheck && 298 (preat.va_ctime.tv_sec != guard.tv_sec || 299 preat.va_ctime.tv_nsec != guard.tv_nsec)) 300 error = NFSERR_NOT_SYNC; 301 if (error) { 302 vput(vp); 303 nfsm_reply(NFSX_WCCDATA(v3)); 304 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 305 vn_finished_write(mp, 0); 306 return (0); 307 } 308 } 309 310 /* 311 * If the size is being changed write acces is required, otherwise 312 * just check for a read only file system. 313 */ 314 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 315 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 316 error = EROFS; 317 goto out; 318 } 319 } else { 320 if (vp->v_type == VDIR) { 321 error = EISDIR; 322 goto out; 323 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 324 lwp, 0)) != 0) 325 goto out; 326 } 327 error = VOP_SETATTR(vp, &va, cred, lwp); 328 postat_ret = VOP_GETATTR(vp, &va, cred, lwp); 329 if (!error) 330 error = postat_ret; 331 out: 332 vput(vp); 333 vn_finished_write(mp, 0); 334 nfsm_reply(NFSX_WCCORFATTR(v3)); 335 if (v3) { 336 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 337 return (0); 338 } else { 339 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 340 nfsm_srvfillattr(&va, fp); 341 } 342 nfsm_srvdone; 343 } 344 345 /* 346 * nfs lookup rpc 347 */ 348 int 349 nfsrv_lookup(nfsd, slp, lwp, mrq) 350 struct nfsrv_descript *nfsd; 351 struct nfssvc_sock *slp; 352 struct lwp *lwp; 353 struct mbuf **mrq; 354 { 355 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 356 struct mbuf *nam = nfsd->nd_nam; 357 char *dpos = nfsd->nd_dpos; 358 kauth_cred_t cred = nfsd->nd_cr; 359 struct nfs_fattr *fp; 360 struct nameidata nd, ind, *ndp = &nd; 361 struct vnode *vp, *dirp; 362 nfsrvfh_t nsfh; 363 char *cp; 364 u_int32_t *tl; 365 int32_t t1; 366 char *bpos; 367 int error = 0, cache = 0, dirattr_ret = 1; 368 uint32_t len; 369 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 370 char *cp2; 371 struct mbuf *mb, *mreq; 372 struct vattr va, dirattr; 373 u_quad_t frev; 374 375 nfsm_srvmtofh(&nsfh); 376 nfsm_srvnamesiz(len); 377 378 pubflag = nfs_ispublicfh(&nsfh); 379 380 nd.ni_cnd.cn_cred = cred; 381 nd.ni_cnd.cn_nameiop = LOOKUP; 382 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 383 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 384 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 385 386 if (!error && pubflag) { 387 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 388 /* 389 * Setup call to lookup() to see if we can find 390 * the index file. Arguably, this doesn't belong 391 * in a kernel.. Ugh. 392 */ 393 ind = nd; 394 VOP_UNLOCK(nd.ni_vp, 0); 395 ind.ni_pathlen = strlen(nfs_pub.np_index); 396 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 397 nfs_pub.np_index; 398 ind.ni_startdir = nd.ni_vp; 399 VREF(ind.ni_startdir); 400 error = lookup(&ind); 401 if (!error) { 402 /* 403 * Found an index file. Get rid of 404 * the old references. 405 */ 406 if (dirp) 407 vrele(dirp); 408 dirp = nd.ni_vp; 409 vrele(nd.ni_startdir); 410 ndp = &ind; 411 } else 412 error = 0; 413 } 414 /* 415 * If the public filehandle was used, check that this lookup 416 * didn't result in a filehandle outside the publicly exported 417 * filesystem. 418 */ 419 420 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 421 vput(nd.ni_vp); 422 error = EPERM; 423 } 424 } 425 426 if (dirp) { 427 if (v3) 428 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred, lwp); 429 vrele(dirp); 430 } 431 432 if (error) { 433 nfsm_reply(NFSX_POSTOPATTR(v3)); 434 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 435 return (0); 436 } 437 438 nqsrv_getl(ndp->ni_startdir, ND_READ); 439 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 440 vp = ndp->ni_vp; 441 error = nfsrv_composefh(vp, &nsfh, v3); 442 if (!error) 443 error = VOP_GETATTR(vp, &va, cred, lwp); 444 vput(vp); 445 vrele(ndp->ni_startdir); 446 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 447 NFSX_POSTOPATTR(v3)); 448 if (error) { 449 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 450 return (0); 451 } 452 nfsm_srvfhtom(&nsfh, v3); 453 if (v3) { 454 nfsm_srvpostop_attr(0, &va); 455 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 456 } else { 457 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 458 nfsm_srvfillattr(&va, fp); 459 } 460 nfsm_srvdone; 461 } 462 463 /* 464 * nfs readlink service 465 */ 466 int 467 nfsrv_readlink(nfsd, slp, lwp, mrq) 468 struct nfsrv_descript *nfsd; 469 struct nfssvc_sock *slp; 470 struct lwp *lwp; 471 struct mbuf **mrq; 472 { 473 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 474 struct mbuf *nam = nfsd->nd_nam; 475 char *dpos = nfsd->nd_dpos; 476 kauth_cred_t cred = nfsd->nd_cr; 477 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 478 struct iovec *ivp = iv; 479 struct mbuf *mp; 480 u_int32_t *tl; 481 int32_t t1; 482 char *bpos; 483 int error = 0, rdonly, cache = 0, i, padlen, getret; 484 uint32_t len; 485 int v3 = (nfsd->nd_flag & ND_NFSV3); 486 char *cp2; 487 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 488 struct vnode *vp; 489 struct vattr attr; 490 nfsrvfh_t nsfh; 491 struct uio io, *uiop = &io; 492 u_quad_t frev; 493 494 nfsm_srvmtofh(&nsfh); 495 len = 0; 496 i = 0; 497 while (len < NFS_MAXPATHLEN) { 498 mp = m_get(M_WAIT, MT_DATA); 499 MCLAIM(mp, &nfs_mowner); 500 m_clget(mp, M_WAIT); 501 mp->m_len = NFSMSIZ(mp); 502 if (len == 0) 503 mp3 = mp2 = mp; 504 else { 505 mp2->m_next = mp; 506 mp2 = mp; 507 } 508 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 509 mp->m_len = NFS_MAXPATHLEN-len; 510 len = NFS_MAXPATHLEN; 511 } else 512 len += mp->m_len; 513 ivp->iov_base = mtod(mp, void *); 514 ivp->iov_len = mp->m_len; 515 i++; 516 ivp++; 517 } 518 uiop->uio_iov = iv; 519 uiop->uio_iovcnt = i; 520 uiop->uio_offset = 0; 521 uiop->uio_resid = len; 522 uiop->uio_rw = UIO_READ; 523 UIO_SETUP_SYSSPACE(uiop); 524 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 525 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 526 if (error) { 527 m_freem(mp3); 528 nfsm_reply(2 * NFSX_UNSIGNED); 529 nfsm_srvpostop_attr(1, (struct vattr *)0); 530 return (0); 531 } 532 if (vp->v_type != VLNK) { 533 if (v3) 534 error = EINVAL; 535 else 536 error = ENXIO; 537 goto out; 538 } 539 nqsrv_getl(vp, ND_READ); 540 error = VOP_READLINK(vp, uiop, cred); 541 out: 542 getret = VOP_GETATTR(vp, &attr, cred, lwp); 543 vput(vp); 544 if (error) 545 m_freem(mp3); 546 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 547 if (v3) { 548 nfsm_srvpostop_attr(getret, &attr); 549 if (error) 550 return (0); 551 } 552 len -= uiop->uio_resid; 553 padlen = nfsm_padlen(len); 554 if (uiop->uio_resid || padlen) 555 nfs_zeropad(mp3, uiop->uio_resid, padlen); 556 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 557 *tl = txdr_unsigned(len); 558 mb->m_next = mp3; 559 nfsm_srvdone; 560 } 561 562 /* 563 * nfs read service 564 */ 565 int 566 nfsrv_read(nfsd, slp, lwp, mrq) 567 struct nfsrv_descript *nfsd; 568 struct nfssvc_sock *slp; 569 struct lwp *lwp; 570 struct mbuf **mrq; 571 { 572 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 573 struct mbuf *nam = nfsd->nd_nam; 574 char *dpos = nfsd->nd_dpos; 575 kauth_cred_t cred = nfsd->nd_cr; 576 struct mbuf *m; 577 struct nfs_fattr *fp; 578 u_int32_t *tl; 579 int32_t t1; 580 int i; 581 char *bpos; 582 int error = 0, rdonly, cache = 0, getret; 583 int v3 = (nfsd->nd_flag & ND_NFSV3); 584 uint32_t reqlen, len, cnt, left; 585 int padlen; 586 char *cp2; 587 struct mbuf *mb, *mreq; 588 struct vnode *vp; 589 nfsrvfh_t nsfh; 590 struct uio io, *uiop = &io; 591 struct vattr va; 592 off_t off; 593 u_quad_t frev; 594 595 nfsm_srvmtofh(&nsfh); 596 if (v3) { 597 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 598 off = fxdr_hyper(tl); 599 } else { 600 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 601 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 602 } 603 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 604 reqlen = fxdr_unsigned(uint32_t, *tl); 605 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 606 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 607 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 608 if (error) { 609 nfsm_reply(2 * NFSX_UNSIGNED); 610 nfsm_srvpostop_attr(1, (struct vattr *)0); 611 return (0); 612 } 613 if (vp->v_type != VREG) { 614 if (v3) 615 error = EINVAL; 616 else 617 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 618 } 619 if (!error) { 620 nqsrv_getl(vp, ND_READ); 621 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 622 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 623 } 624 getret = VOP_GETATTR(vp, &va, cred, lwp); 625 if (!error) 626 error = getret; 627 if (error) { 628 vput(vp); 629 nfsm_reply(NFSX_POSTOPATTR(v3)); 630 nfsm_srvpostop_attr(getret, &va); 631 return (0); 632 } 633 if (off >= va.va_size) 634 cnt = 0; 635 else if ((off + reqlen) > va.va_size) 636 cnt = va.va_size - off; 637 else 638 cnt = reqlen; 639 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 640 if (v3) { 641 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 642 *tl++ = nfs_true; 643 fp = (struct nfs_fattr *)tl; 644 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 645 } else { 646 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 647 fp = (struct nfs_fattr *)tl; 648 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 649 } 650 len = left = cnt; 651 if (cnt > 0) { 652 if (nfsd_use_loan) { 653 struct vm_page **pgpp; 654 voff_t pgoff = trunc_page(off); 655 int npages; 656 vaddr_t lva; 657 658 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 659 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 660 661 /* allocate kva for mbuf data */ 662 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 663 if (lva == 0) { 664 /* fall back to VOP_READ */ 665 goto loan_fail; 666 } 667 668 /* allocate mbuf */ 669 m = m_get(M_WAIT, MT_DATA); 670 MCLAIM(m, &nfs_mowner); 671 pgpp = m->m_ext.ext_pgs; 672 673 /* loan pages */ 674 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 675 pgpp); 676 if (error) { 677 sokvafree(lva, npages << PAGE_SHIFT); 678 m_free(m); 679 if (error == EBUSY) 680 goto loan_fail; 681 goto read_error; 682 } 683 684 /* associate kva to mbuf */ 685 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 686 cnt, M_MBUF, soloanfree, slp->ns_so); 687 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 688 m->m_len = cnt; 689 690 /* map pages */ 691 for (i = 0; i < npages; i++) { 692 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 693 VM_PROT_READ); 694 lva += PAGE_SIZE; 695 } 696 697 pmap_update(pmap_kernel()); 698 699 mb->m_next = m; 700 mb = m; 701 error = 0; 702 uiop->uio_resid = 0; 703 } else { 704 struct iovec *iv; 705 struct iovec *iv2; 706 struct mbuf *m2; 707 int siz; 708 loan_fail: 709 /* 710 * Generate the mbuf list with the uio_iov ref. to it. 711 */ 712 i = 0; 713 m = m2 = mb; 714 while (left > 0) { 715 siz = min(M_TRAILINGSPACE(m), left); 716 if (siz > 0) { 717 left -= siz; 718 i++; 719 } 720 if (left > 0) { 721 m = m_get(M_WAIT, MT_DATA); 722 MCLAIM(m, &nfs_mowner); 723 m_clget(m, M_WAIT); 724 m->m_len = 0; 725 m2->m_next = m; 726 m2 = m; 727 } 728 } 729 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 730 uiop->uio_iov = iv2 = iv; 731 m = mb; 732 left = cnt; 733 i = 0; 734 while (left > 0) { 735 if (m == NULL) 736 panic("nfsrv_read iov"); 737 siz = min(M_TRAILINGSPACE(m), left); 738 if (siz > 0) { 739 iv->iov_base = mtod(m, char *) + 740 m->m_len; 741 iv->iov_len = siz; 742 m->m_len += siz; 743 left -= siz; 744 iv++; 745 i++; 746 } 747 m = m->m_next; 748 } 749 uiop->uio_iovcnt = i; 750 uiop->uio_offset = off; 751 uiop->uio_resid = cnt; 752 uiop->uio_rw = UIO_READ; 753 UIO_SETUP_SYSSPACE(uiop); 754 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 755 free((void *)iv2, M_TEMP); 756 } 757 read_error: 758 if (error || (getret = VOP_GETATTR(vp, &va, cred, lwp)) != 0){ 759 if (!error) 760 error = getret; 761 m_freem(mreq); 762 vput(vp); 763 nfsm_reply(NFSX_POSTOPATTR(v3)); 764 nfsm_srvpostop_attr(getret, &va); 765 return (0); 766 } 767 } else { 768 uiop->uio_resid = 0; 769 } 770 vput(vp); 771 nfsm_srvfillattr(&va, fp); 772 len -= uiop->uio_resid; 773 padlen = nfsm_padlen(len); 774 if (uiop->uio_resid || padlen) 775 nfs_zeropad(mb, uiop->uio_resid, padlen); 776 if (v3) { 777 /* count */ 778 *tl++ = txdr_unsigned(len); 779 /* eof */ 780 if (off + len >= va.va_size) 781 *tl++ = nfs_true; 782 else 783 *tl++ = nfs_false; 784 } 785 *tl = txdr_unsigned(len); 786 nfsm_srvdone; 787 } 788 789 /* 790 * nfs write service 791 */ 792 int 793 nfsrv_write(nfsd, slp, lwp, mrq) 794 struct nfsrv_descript *nfsd; 795 struct nfssvc_sock *slp; 796 struct lwp *lwp; 797 struct mbuf **mrq; 798 { 799 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 800 struct mbuf *nam = nfsd->nd_nam; 801 char *dpos = nfsd->nd_dpos; 802 kauth_cred_t cred = nfsd->nd_cr; 803 struct iovec *ivp; 804 int i, cnt; 805 struct mbuf *mp; 806 struct nfs_fattr *fp; 807 struct iovec *iv; 808 struct vattr va, forat; 809 u_int32_t *tl; 810 int32_t t1; 811 char *bpos; 812 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 813 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 814 int stable = NFSV3WRITE_FILESYNC; 815 int v3 = (nfsd->nd_flag & ND_NFSV3); 816 char *cp2; 817 struct mbuf *mb, *mreq; 818 struct vnode *vp; 819 nfsrvfh_t nsfh; 820 struct uio io, *uiop = &io; 821 off_t off; 822 u_quad_t frev; 823 struct mount *mntp = NULL; 824 825 if (mrep == NULL) { 826 *mrq = NULL; 827 return (0); 828 } 829 nfsm_srvmtofh(&nsfh); 830 if ((mntp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 831 return (ESTALE); 832 vn_start_write(NULL, &mntp, V_WAIT); 833 if (v3) { 834 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 835 off = fxdr_hyper(tl); 836 tl += 3; 837 stable = fxdr_unsigned(int, *tl++); 838 } else { 839 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 840 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 841 tl += 2; 842 } 843 retlen = len = fxdr_unsigned(int32_t, *tl); 844 cnt = i = 0; 845 846 /* 847 * For NFS Version 2, it is not obvious what a write of zero length 848 * should do, but I might as well be consistent with Version 3, 849 * which is to return ok so long as there are no permission problems. 850 */ 851 if (len > 0) { 852 zeroing = 1; 853 mp = mrep; 854 while (mp) { 855 if (mp == md) { 856 zeroing = 0; 857 adjust = dpos - mtod(mp, char *); 858 mp->m_len -= adjust; 859 if (mp->m_len > 0 && adjust > 0) 860 NFSMADV(mp, adjust); 861 } 862 if (zeroing) 863 mp->m_len = 0; 864 else if (mp->m_len > 0) { 865 i += mp->m_len; 866 if (i > len) { 867 mp->m_len -= (i - len); 868 zeroing = 1; 869 } 870 if (mp->m_len > 0) 871 cnt++; 872 } 873 mp = mp->m_next; 874 } 875 } 876 if (len > NFS_MAXDATA || len < 0 || i < len) { 877 error = EIO; 878 nfsm_reply(2 * NFSX_UNSIGNED); 879 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 880 vn_finished_write(mntp, 0); 881 return (0); 882 } 883 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 884 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 885 if (error) { 886 nfsm_reply(2 * NFSX_UNSIGNED); 887 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 888 vn_finished_write(mntp, 0); 889 return (0); 890 } 891 if (v3) 892 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 893 if (vp->v_type != VREG) { 894 if (v3) 895 error = EINVAL; 896 else 897 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 898 } 899 if (!error) { 900 nqsrv_getl(vp, ND_WRITE); 901 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 902 } 903 if (error) { 904 vput(vp); 905 nfsm_reply(NFSX_WCCDATA(v3)); 906 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 907 vn_finished_write(mntp, 0); 908 return (0); 909 } 910 911 if (len > 0) { 912 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 913 uiop->uio_iov = iv = ivp; 914 uiop->uio_iovcnt = cnt; 915 mp = mrep; 916 while (mp) { 917 if (mp->m_len > 0) { 918 ivp->iov_base = mtod(mp, void *); 919 ivp->iov_len = mp->m_len; 920 ivp++; 921 } 922 mp = mp->m_next; 923 } 924 925 /* 926 * XXX 927 * The IO_METASYNC flag indicates that all metadata (and not 928 * just enough to ensure data integrity) must be written to 929 * stable storage synchronously. 930 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 931 */ 932 if (stable == NFSV3WRITE_UNSTABLE) 933 ioflags = IO_NODELOCKED; 934 else if (stable == NFSV3WRITE_DATASYNC) 935 ioflags = (IO_SYNC | IO_NODELOCKED); 936 else 937 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 938 uiop->uio_resid = len; 939 uiop->uio_rw = UIO_WRITE; 940 uiop->uio_offset = off; 941 UIO_SETUP_SYSSPACE(uiop); 942 error = VOP_WRITE(vp, uiop, ioflags, cred); 943 nfsstats.srvvop_writes++; 944 free(iv, M_TEMP); 945 } 946 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 947 vput(vp); 948 vn_finished_write(mntp, 0); 949 if (!error) 950 error = aftat_ret; 951 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 952 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 953 if (v3) { 954 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 955 if (error) 956 return (0); 957 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 958 *tl++ = txdr_unsigned(retlen); 959 if (stable == NFSV3WRITE_UNSTABLE) 960 *tl++ = txdr_unsigned(stable); 961 else 962 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 963 /* 964 * Actually, there is no need to txdr these fields, 965 * but it may make the values more human readable, 966 * for debugging purposes. 967 */ 968 *tl++ = txdr_unsigned(boottime.tv_sec); 969 *tl = txdr_unsigned(boottime.tv_usec); 970 } else { 971 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 972 nfsm_srvfillattr(&va, fp); 973 } 974 nfsm_srvdone; 975 } 976 977 /* 978 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 979 * two nd_flag fields of the descriptors contained 980 * ND_KERBAUTH. 981 */ 982 static int 983 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 984 { 985 int i, do_ngroups; 986 987 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 988 return (0); 989 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 990 return (0); 991 do_ngroups = kauth_cred_ngroups(cred1); 992 for (i = 0; i < do_ngroups; i++) 993 if (kauth_cred_group(cred1, i) != 994 kauth_cred_group(cred2, i)) 995 return (0); 996 997 return (1); 998 } 999 1000 static struct nfsrvw_delayhash * 1001 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1002 { 1003 uint32_t hash; 1004 1005 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1006 HASH32_BUF_INIT); 1007 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1008 } 1009 1010 /* 1011 * NFS write service with write gathering support. Called when 1012 * nfsrvw_procrastinate > 0. 1013 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1014 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1015 * Jan. 1994. 1016 */ 1017 int 1018 nfsrv_writegather(ndp, slp, lwp, mrq) 1019 struct nfsrv_descript **ndp; 1020 struct nfssvc_sock *slp; 1021 struct lwp *lwp; 1022 struct mbuf **mrq; 1023 { 1024 struct timeval now; 1025 struct iovec *ivp; 1026 struct mbuf *mp; 1027 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1028 struct nfs_fattr *fp; 1029 int i = 0; 1030 struct iovec *iov; 1031 struct nfsrvw_delayhash *wpp; 1032 kauth_cred_t cred; 1033 struct vattr va, forat; 1034 u_int32_t *tl; 1035 int32_t t1; 1036 char *bpos, *dpos; 1037 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1038 int ioflags, aftat_ret = 1, s, adjust, v3, zeroing; 1039 char *cp2; 1040 struct mbuf *mb, *mreq, *mrep, *md; 1041 struct vnode *vp; 1042 struct uio io, *uiop = &io; 1043 u_quad_t frev, cur_usec; 1044 struct mount *mntp = NULL; 1045 1046 *mrq = NULL; 1047 if (*ndp) { 1048 nfsd = *ndp; 1049 *ndp = NULL; 1050 mrep = nfsd->nd_mrep; 1051 md = nfsd->nd_md; 1052 dpos = nfsd->nd_dpos; 1053 cred = nfsd->nd_cr; 1054 v3 = (nfsd->nd_flag & ND_NFSV3); 1055 LIST_INIT(&nfsd->nd_coalesce); 1056 nfsd->nd_mreq = NULL; 1057 nfsd->nd_stable = NFSV3WRITE_FILESYNC; 1058 getmicrotime(&now); 1059 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1060 nfsd->nd_time = cur_usec + nfsrvw_procrastinate; 1061 1062 /* 1063 * Now, get the write header.. 1064 */ 1065 nfsm_srvmtofh(&nfsd->nd_fh); 1066 if (v3) { 1067 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1068 nfsd->nd_off = fxdr_hyper(tl); 1069 tl += 3; 1070 nfsd->nd_stable = fxdr_unsigned(int, *tl++); 1071 } else { 1072 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1073 nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 1074 tl += 2; 1075 } 1076 len = fxdr_unsigned(int32_t, *tl); 1077 nfsd->nd_len = len; 1078 nfsd->nd_eoff = nfsd->nd_off + len; 1079 1080 /* 1081 * Trim the header out of the mbuf list and trim off any trailing 1082 * junk so that the mbuf list has only the write data. 1083 */ 1084 zeroing = 1; 1085 i = 0; 1086 mp = mrep; 1087 while (mp) { 1088 if (mp == md) { 1089 zeroing = 0; 1090 adjust = dpos - mtod(mp, char *); 1091 mp->m_len -= adjust; 1092 if (mp->m_len > 0 && adjust > 0) 1093 NFSMADV(mp, adjust); 1094 } 1095 if (zeroing) 1096 mp->m_len = 0; 1097 else { 1098 i += mp->m_len; 1099 if (i > len) { 1100 mp->m_len -= (i - len); 1101 zeroing = 1; 1102 } 1103 } 1104 mp = mp->m_next; 1105 } 1106 if (len > NFS_MAXDATA || len < 0 || i < len) { 1107 nfsmout: 1108 m_freem(mrep); 1109 error = EIO; 1110 nfsm_writereply(2 * NFSX_UNSIGNED, v3); 1111 if (v3) 1112 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1113 nfsd->nd_mreq = mreq; 1114 nfsd->nd_mrep = NULL; 1115 nfsd->nd_time = 0; 1116 } 1117 1118 /* 1119 * Add this entry to the hash and time queues. 1120 */ 1121 s = splsoftclock(); 1122 owp = NULL; 1123 wp = LIST_FIRST(&slp->ns_tq); 1124 while (wp && wp->nd_time < nfsd->nd_time) { 1125 owp = wp; 1126 wp = LIST_NEXT(wp, nd_tq); 1127 } 1128 if (owp) { 1129 LIST_INSERT_AFTER(owp, nfsd, nd_tq); 1130 } else { 1131 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1132 } 1133 if (nfsd->nd_mrep) { 1134 wpp = nfsrv_nwdelayhash(slp, &nfsd->nd_fh); 1135 owp = NULL; 1136 wp = LIST_FIRST(wpp); 1137 while (wp && nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1138 owp = wp; 1139 wp = LIST_NEXT(wp, nd_hash); 1140 } 1141 while (wp && wp->nd_off < nfsd->nd_off && 1142 !nfsrv_comparefh(&nfsd->nd_fh, &wp->nd_fh)) { 1143 owp = wp; 1144 wp = LIST_NEXT(wp, nd_hash); 1145 } 1146 if (owp) { 1147 LIST_INSERT_AFTER(owp, nfsd, nd_hash); 1148 1149 /* 1150 * Search the hash list for overlapping entries and 1151 * coalesce. 1152 */ 1153 for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { 1154 wp = LIST_NEXT(nfsd, nd_hash); 1155 if (nfsrv_samecred(owp->nd_cr, nfsd->nd_cr)) 1156 nfsrvw_coalesce(owp, nfsd); 1157 } 1158 } else { 1159 LIST_INSERT_HEAD(wpp, nfsd, nd_hash); 1160 } 1161 } 1162 splx(s); 1163 } 1164 1165 /* 1166 * Now, do VOP_WRITE()s for any one(s) that need to be done now 1167 * and generate the associated reply mbuf list(s). 1168 */ 1169 loop1: 1170 getmicrotime(&now); 1171 cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec; 1172 s = splsoftclock(); 1173 for (nfsd = LIST_FIRST(&slp->ns_tq); nfsd; nfsd = owp) { 1174 owp = LIST_NEXT(nfsd, nd_tq); 1175 if (nfsd->nd_time > cur_usec) 1176 break; 1177 if (nfsd->nd_mreq) 1178 continue; 1179 LIST_REMOVE(nfsd, nd_tq); 1180 LIST_REMOVE(nfsd, nd_hash); 1181 splx(s); 1182 mrep = nfsd->nd_mrep; 1183 nfsd->nd_mrep = NULL; 1184 cred = nfsd->nd_cr; 1185 v3 = (nfsd->nd_flag & ND_NFSV3); 1186 forat_ret = aftat_ret = 1; 1187 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1188 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1189 false); 1190 if (!error) { 1191 if (v3) 1192 forat_ret = VOP_GETATTR(vp, &forat, cred, lwp); 1193 if (vp->v_type != VREG) { 1194 if (v3) 1195 error = EINVAL; 1196 else 1197 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1198 } 1199 } else 1200 vp = NULL; 1201 if (!error) { 1202 nqsrv_getl(vp, ND_WRITE); 1203 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1204 } 1205 1206 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1207 ioflags = IO_NODELOCKED; 1208 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1209 ioflags = (IO_SYNC | IO_NODELOCKED); 1210 else 1211 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1212 uiop->uio_rw = UIO_WRITE; 1213 uiop->uio_offset = nfsd->nd_off; 1214 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1215 UIO_SETUP_SYSSPACE(uiop); 1216 if (uiop->uio_resid > 0) { 1217 mp = mrep; 1218 i = 0; 1219 while (mp) { 1220 if (mp->m_len > 0) 1221 i++; 1222 mp = mp->m_next; 1223 } 1224 uiop->uio_iovcnt = i; 1225 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1226 uiop->uio_iov = ivp = iov; 1227 mp = mrep; 1228 while (mp) { 1229 if (mp->m_len > 0) { 1230 ivp->iov_base = mtod(mp, void *); 1231 ivp->iov_len = mp->m_len; 1232 ivp++; 1233 } 1234 mp = mp->m_next; 1235 } 1236 if (!error) { 1237 if (vn_start_write(vp, &mntp, V_NOWAIT) != 0) { 1238 VOP_UNLOCK(vp, 0); 1239 vn_start_write(NULL, &mntp, V_WAIT); 1240 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1241 } 1242 if (!error) { 1243 error = VOP_WRITE(vp, uiop, ioflags, cred); 1244 nfsstats.srvvop_writes++; 1245 vn_finished_write(mntp, 0); 1246 } 1247 } 1248 free((void *)iov, M_TEMP); 1249 } 1250 m_freem(mrep); 1251 if (vp) { 1252 aftat_ret = VOP_GETATTR(vp, &va, cred, lwp); 1253 vput(vp); 1254 } 1255 1256 /* 1257 * Loop around generating replies for all write rpcs that have 1258 * now been completed. 1259 */ 1260 swp = nfsd; 1261 do { 1262 if (error) { 1263 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1264 if (v3) { 1265 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1266 } 1267 } else { 1268 nfsm_writereply(NFSX_PREOPATTR(v3) + 1269 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1270 NFSX_WRITEVERF(v3), v3); 1271 if (v3) { 1272 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1273 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1274 *tl++ = txdr_unsigned(nfsd->nd_len); 1275 *tl++ = txdr_unsigned(swp->nd_stable); 1276 /* 1277 * Actually, there is no need to txdr these fields, 1278 * but it may make the values more human readable, 1279 * for debugging purposes. 1280 */ 1281 *tl++ = txdr_unsigned(boottime.tv_sec); 1282 *tl = txdr_unsigned(boottime.tv_usec); 1283 } else { 1284 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1285 nfsm_srvfillattr(&va, fp); 1286 } 1287 } 1288 nfsd->nd_mreq = mreq; 1289 if (nfsd->nd_mrep) 1290 panic("nfsrv_write: nd_mrep not free"); 1291 1292 /* 1293 * Done. Put it at the head of the timer queue so that 1294 * the final phase can return the reply. 1295 */ 1296 s = splsoftclock(); 1297 if (nfsd != swp) { 1298 nfsd->nd_time = 0; 1299 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1300 } 1301 nfsd = LIST_FIRST(&swp->nd_coalesce); 1302 if (nfsd) { 1303 LIST_REMOVE(nfsd, nd_tq); 1304 } 1305 splx(s); 1306 } while (nfsd); 1307 s = splsoftclock(); 1308 swp->nd_time = 0; 1309 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1310 splx(s); 1311 goto loop1; 1312 } 1313 splx(s); 1314 1315 /* 1316 * Search for a reply to return. 1317 */ 1318 s = splsoftclock(); 1319 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1320 if (nfsd->nd_mreq) { 1321 LIST_REMOVE(nfsd, nd_tq); 1322 *mrq = nfsd->nd_mreq; 1323 *ndp = nfsd; 1324 break; 1325 } 1326 } 1327 splx(s); 1328 return (0); 1329 } 1330 1331 /* 1332 * Coalesce the write request nfsd into owp. To do this we must: 1333 * - remove nfsd from the queues 1334 * - merge nfsd->nd_mrep into owp->nd_mrep 1335 * - update the nd_eoff and nd_stable for owp 1336 * - put nfsd on owp's nd_coalesce list 1337 * NB: Must be called at splsoftclock(). 1338 */ 1339 void 1340 nfsrvw_coalesce(owp, nfsd) 1341 struct nfsrv_descript *owp; 1342 struct nfsrv_descript *nfsd; 1343 { 1344 int overlap; 1345 struct mbuf *mp; 1346 struct nfsrv_descript *m; 1347 1348 LIST_REMOVE(nfsd, nd_hash); 1349 LIST_REMOVE(nfsd, nd_tq); 1350 if (owp->nd_eoff < nfsd->nd_eoff) { 1351 overlap = owp->nd_eoff - nfsd->nd_off; 1352 if (overlap < 0) 1353 panic("nfsrv_coalesce: bad off"); 1354 if (overlap > 0) 1355 m_adj(nfsd->nd_mrep, overlap); 1356 mp = owp->nd_mrep; 1357 while (mp->m_next) 1358 mp = mp->m_next; 1359 mp->m_next = nfsd->nd_mrep; 1360 owp->nd_eoff = nfsd->nd_eoff; 1361 } else 1362 m_freem(nfsd->nd_mrep); 1363 nfsd->nd_mrep = NULL; 1364 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1365 owp->nd_stable = NFSV3WRITE_FILESYNC; 1366 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1367 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1368 owp->nd_stable = NFSV3WRITE_DATASYNC; 1369 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1370 /* 1371 * nfsd might hold coalesce elements! Move them to owp. 1372 * Otherwise, requests may be lost and clients will be stuck. 1373 */ 1374 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1375 LIST_REMOVE(m, nd_tq); 1376 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1377 } 1378 } 1379 1380 /* 1381 * nfs create service 1382 * now does a truncate to 0 length via. setattr if it already exists 1383 */ 1384 int 1385 nfsrv_create(nfsd, slp, lwp, mrq) 1386 struct nfsrv_descript *nfsd; 1387 struct nfssvc_sock *slp; 1388 struct lwp *lwp; 1389 struct mbuf **mrq; 1390 { 1391 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1392 struct mbuf *nam = nfsd->nd_nam; 1393 char *dpos = nfsd->nd_dpos; 1394 kauth_cred_t cred = nfsd->nd_cr; 1395 struct nfs_fattr *fp; 1396 struct vattr va, dirfor, diraft; 1397 struct nfsv2_sattr *sp; 1398 u_int32_t *tl; 1399 struct nameidata nd; 1400 char *cp; 1401 int32_t t1; 1402 char *bpos; 1403 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1404 int rdev = 0; 1405 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1406 char *cp2; 1407 struct mbuf *mb, *mreq; 1408 struct vnode *vp = NULL, *dirp = NULL; 1409 nfsrvfh_t nsfh; 1410 u_quad_t frev, tempsize; 1411 u_char cverf[NFSX_V3CREATEVERF]; 1412 struct mount *mp = NULL; 1413 1414 nd.ni_cnd.cn_nameiop = 0; 1415 nfsm_srvmtofh(&nsfh); 1416 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1417 return (ESTALE); 1418 vn_start_write(NULL, &mp, V_WAIT); 1419 nfsm_srvnamesiz(len); 1420 nd.ni_cnd.cn_cred = cred; 1421 nd.ni_cnd.cn_nameiop = CREATE; 1422 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1423 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1424 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1425 if (dirp && v3) { 1426 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1427 } 1428 if (error) { 1429 nfsm_reply(NFSX_WCCDATA(v3)); 1430 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1431 if (dirp) 1432 vrele(dirp); 1433 vn_finished_write(mp, 0); 1434 return (0); 1435 } 1436 VATTR_NULL(&va); 1437 if (v3) { 1438 va.va_mode = 0; 1439 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1440 how = fxdr_unsigned(int, *tl); 1441 switch (how) { 1442 case NFSV3CREATE_GUARDED: 1443 if (nd.ni_vp) { 1444 error = EEXIST; 1445 break; 1446 } 1447 case NFSV3CREATE_UNCHECKED: 1448 nfsm_srvsattr(&va); 1449 break; 1450 case NFSV3CREATE_EXCLUSIVE: 1451 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1452 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1453 exclusive_flag = 1; 1454 break; 1455 }; 1456 va.va_type = VREG; 1457 } else { 1458 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1459 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1460 if (va.va_type == VNON) 1461 va.va_type = VREG; 1462 va.va_mode = nfstov_mode(sp->sa_mode); 1463 switch (va.va_type) { 1464 case VREG: 1465 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1466 if (tsize != -1) 1467 va.va_size = (u_quad_t)tsize; 1468 break; 1469 case VCHR: 1470 case VBLK: 1471 case VFIFO: 1472 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1473 break; 1474 default: 1475 break; 1476 }; 1477 } 1478 1479 /* 1480 * Iff doesn't exist, create it 1481 * otherwise just truncate to 0 length 1482 * should I set the mode too ?? 1483 */ 1484 if (nd.ni_vp == NULL) { 1485 if (va.va_type == VREG || va.va_type == VSOCK) { 1486 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1487 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1488 if (!error) { 1489 if (exclusive_flag) { 1490 exclusive_flag = 0; 1491 VATTR_NULL(&va); 1492 /* 1493 * XXX 1494 * assuming NFSX_V3CREATEVERF 1495 * == sizeof(nfstime3) 1496 */ 1497 fxdr_nfsv3time(cverf, &va.va_atime); 1498 error = VOP_SETATTR(nd.ni_vp, &va, cred, 1499 lwp); 1500 } 1501 } 1502 } else if (va.va_type == VCHR || va.va_type == VBLK || 1503 va.va_type == VFIFO) { 1504 if (va.va_type == VCHR && rdev == 0xffffffff) 1505 va.va_type = VFIFO; 1506 if (va.va_type != VFIFO && 1507 (error = kauth_authorize_generic(cred, 1508 KAUTH_GENERIC_ISSUSER, NULL))) { 1509 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1510 vput(nd.ni_dvp); 1511 nfsm_reply(0); 1512 vn_finished_write(mp, 0); 1513 return (error); 1514 } else 1515 va.va_rdev = (dev_t)rdev; 1516 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1517 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1518 &va); 1519 if (error) { 1520 nfsm_reply(0); 1521 } 1522 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1523 vput(nd.ni_vp); 1524 vrele(nd.ni_dvp); 1525 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1526 error = EINVAL; 1527 nfsm_reply(0); 1528 } 1529 } else { 1530 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1531 vput(nd.ni_dvp); 1532 error = ENXIO; 1533 } 1534 vp = nd.ni_vp; 1535 } else { 1536 vp = nd.ni_vp; 1537 if (nd.ni_dvp == vp) 1538 vrele(nd.ni_dvp); 1539 else 1540 vput(nd.ni_dvp); 1541 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1542 if (!error && va.va_size != -1) { 1543 error = nfsrv_access(vp, VWRITE, cred, 1544 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1545 if (!error) { 1546 nqsrv_getl(vp, ND_WRITE); 1547 tempsize = va.va_size; 1548 VATTR_NULL(&va); 1549 va.va_size = tempsize; 1550 error = VOP_SETATTR(vp, &va, cred, lwp); 1551 } 1552 } 1553 if (error) 1554 vput(vp); 1555 } 1556 if (!error) { 1557 error = nfsrv_composefh(vp, &nsfh, v3); 1558 if (!error) 1559 error = VOP_GETATTR(vp, &va, cred, lwp); 1560 vput(vp); 1561 } 1562 if (v3) { 1563 if (exclusive_flag && !error) { 1564 /* 1565 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1566 */ 1567 char oldverf[NFSX_V3CREATEVERF]; 1568 1569 txdr_nfsv3time(&va.va_atime, oldverf); 1570 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1571 error = EEXIST; 1572 } 1573 if (dirp) { 1574 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1575 } 1576 } 1577 if (dirp) { 1578 vrele(dirp); 1579 } 1580 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1581 if (v3) { 1582 if (!error) { 1583 nfsm_srvpostop_fh(&nsfh); 1584 nfsm_srvpostop_attr(0, &va); 1585 } 1586 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1587 } else { 1588 nfsm_srvfhtom(&nsfh, v3); 1589 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1590 nfsm_srvfillattr(&va, fp); 1591 } 1592 vn_finished_write(mp, 0); 1593 return (0); 1594 nfsmout: 1595 if (dirp) 1596 vrele(dirp); 1597 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1598 if (nd.ni_dvp == nd.ni_vp) 1599 vrele(nd.ni_dvp); 1600 else 1601 vput(nd.ni_dvp); 1602 if (nd.ni_vp) 1603 vput(nd.ni_vp); 1604 vn_finished_write(mp, 0); 1605 return (error); 1606 } 1607 1608 /* 1609 * nfs v3 mknod service 1610 */ 1611 int 1612 nfsrv_mknod(nfsd, slp, lwp, mrq) 1613 struct nfsrv_descript *nfsd; 1614 struct nfssvc_sock *slp; 1615 struct lwp *lwp; 1616 struct mbuf **mrq; 1617 { 1618 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1619 struct mbuf *nam = nfsd->nd_nam; 1620 char *dpos = nfsd->nd_dpos; 1621 kauth_cred_t cred = nfsd->nd_cr; 1622 struct vattr va, dirfor, diraft; 1623 u_int32_t *tl; 1624 struct nameidata nd; 1625 int32_t t1; 1626 char *bpos; 1627 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1628 u_int32_t major, minor; 1629 enum vtype vtyp; 1630 char *cp2; 1631 struct mbuf *mb, *mreq; 1632 struct vnode *vp, *dirp = (struct vnode *)0; 1633 nfsrvfh_t nsfh; 1634 u_quad_t frev; 1635 struct mount *mp = NULL; 1636 1637 nd.ni_cnd.cn_nameiop = 0; 1638 nfsm_srvmtofh(&nsfh); 1639 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1640 return (ESTALE); 1641 vn_start_write(NULL, &mp, V_WAIT); 1642 nfsm_srvnamesiz(len); 1643 nd.ni_cnd.cn_cred = cred; 1644 nd.ni_cnd.cn_nameiop = CREATE; 1645 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1646 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1647 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1648 if (dirp) 1649 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1650 if (error) { 1651 nfsm_reply(NFSX_WCCDATA(1)); 1652 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1653 if (dirp) 1654 vrele(dirp); 1655 vn_finished_write(mp, 0); 1656 return (0); 1657 } 1658 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1659 vtyp = nfsv3tov_type(*tl); 1660 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1661 error = NFSERR_BADTYPE; 1662 goto abort; 1663 } 1664 VATTR_NULL(&va); 1665 va.va_mode = 0; 1666 nfsm_srvsattr(&va); 1667 if (vtyp == VCHR || vtyp == VBLK) { 1668 dev_t rdev; 1669 1670 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1671 major = fxdr_unsigned(u_int32_t, *tl++); 1672 minor = fxdr_unsigned(u_int32_t, *tl); 1673 rdev = makedev(major, minor); 1674 if (major(rdev) != major || minor(rdev) != minor) { 1675 error = EINVAL; 1676 goto abort; 1677 } 1678 va.va_rdev = rdev; 1679 } 1680 1681 /* 1682 * Iff doesn't exist, create it. 1683 */ 1684 if (nd.ni_vp) { 1685 error = EEXIST; 1686 abort: 1687 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1688 if (nd.ni_dvp == nd.ni_vp) 1689 vrele(nd.ni_dvp); 1690 else 1691 vput(nd.ni_dvp); 1692 if (nd.ni_vp) 1693 vput(nd.ni_vp); 1694 goto out; 1695 } 1696 va.va_type = vtyp; 1697 if (vtyp == VSOCK) { 1698 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1699 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1700 } else { 1701 if (va.va_type != VFIFO && 1702 (error = kauth_authorize_generic(cred, 1703 KAUTH_GENERIC_ISSUSER, NULL))) { 1704 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1705 vput(nd.ni_dvp); 1706 goto out; 1707 } 1708 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1709 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1710 if (error) 1711 goto out; 1712 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1713 vput(nd.ni_vp); 1714 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1715 error = EINVAL; 1716 } 1717 } 1718 out: 1719 vp = nd.ni_vp; 1720 if (!error) { 1721 error = nfsrv_composefh(vp, &nsfh, true); 1722 if (!error) 1723 error = VOP_GETATTR(vp, &va, cred, lwp); 1724 vput(vp); 1725 } 1726 if (dirp) { 1727 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1728 vrele(dirp); 1729 } 1730 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1731 NFSX_WCCDATA(1)); 1732 if (!error) { 1733 nfsm_srvpostop_fh(&nsfh); 1734 nfsm_srvpostop_attr(0, &va); 1735 } 1736 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1737 vn_finished_write(mp, 0); 1738 return (0); 1739 nfsmout: 1740 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1741 if (nd.ni_dvp == nd.ni_vp) 1742 vrele(nd.ni_dvp); 1743 else 1744 vput(nd.ni_dvp); 1745 if (nd.ni_vp) 1746 vput(nd.ni_vp); 1747 if (dirp) 1748 vrele(dirp); 1749 vn_finished_write(mp, 0); 1750 return (error); 1751 } 1752 1753 /* 1754 * nfs remove service 1755 */ 1756 int 1757 nfsrv_remove(nfsd, slp, lwp, mrq) 1758 struct nfsrv_descript *nfsd; 1759 struct nfssvc_sock *slp; 1760 struct lwp *lwp; 1761 struct mbuf **mrq; 1762 { 1763 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1764 struct mbuf *nam = nfsd->nd_nam; 1765 char *dpos = nfsd->nd_dpos; 1766 kauth_cred_t cred = nfsd->nd_cr; 1767 struct nameidata nd; 1768 u_int32_t *tl; 1769 int32_t t1; 1770 char *bpos; 1771 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1772 int v3 = (nfsd->nd_flag & ND_NFSV3); 1773 char *cp2; 1774 struct mbuf *mb, *mreq; 1775 struct vnode *vp, *dirp; 1776 struct vattr dirfor, diraft; 1777 nfsrvfh_t nsfh; 1778 u_quad_t frev; 1779 struct mount *mp = NULL; 1780 1781 #ifndef nolint 1782 vp = (struct vnode *)0; 1783 #endif 1784 nfsm_srvmtofh(&nsfh); 1785 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 1786 return (ESTALE); 1787 vn_start_write(NULL, &mp, V_WAIT); 1788 nfsm_srvnamesiz(len); 1789 nd.ni_cnd.cn_cred = cred; 1790 nd.ni_cnd.cn_nameiop = DELETE; 1791 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1792 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1793 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1794 if (dirp && v3) { 1795 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 1796 } 1797 if (!error) { 1798 vp = nd.ni_vp; 1799 if (vp->v_type == VDIR && 1800 (error = kauth_authorize_generic(cred, 1801 KAUTH_GENERIC_ISSUSER, NULL)) != 0) 1802 goto out; 1803 /* 1804 * The root of a mounted filesystem cannot be deleted. 1805 */ 1806 if (vp->v_flag & VROOT) { 1807 error = EBUSY; 1808 goto out; 1809 } 1810 out: 1811 if (!error) { 1812 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1813 nqsrv_getl(vp, ND_WRITE); 1814 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1815 } else { 1816 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1817 if (nd.ni_dvp == vp) 1818 vrele(nd.ni_dvp); 1819 else 1820 vput(nd.ni_dvp); 1821 vput(vp); 1822 } 1823 } 1824 if (dirp) { 1825 if (v3) { 1826 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 1827 } 1828 vrele(dirp); 1829 } 1830 nfsm_reply(NFSX_WCCDATA(v3)); 1831 if (v3) { 1832 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1833 vn_finished_write(mp, 0); 1834 return (0); 1835 } 1836 vn_finished_write(mp, 0); 1837 nfsm_srvdone; 1838 } 1839 1840 /* 1841 * nfs rename service 1842 */ 1843 int 1844 nfsrv_rename(nfsd, slp, lwp, mrq) 1845 struct nfsrv_descript *nfsd; 1846 struct nfssvc_sock *slp; 1847 struct lwp *lwp; 1848 struct mbuf **mrq; 1849 { 1850 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1851 struct mbuf *nam = nfsd->nd_nam; 1852 char *dpos = nfsd->nd_dpos; 1853 kauth_cred_t cred = nfsd->nd_cr; 1854 u_int32_t *tl; 1855 int32_t t1; 1856 char *bpos; 1857 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1858 uint32_t len, len2; 1859 int tdirfor_ret = 1, tdiraft_ret = 1; 1860 int v3 = (nfsd->nd_flag & ND_NFSV3); 1861 char *cp2; 1862 struct mbuf *mb, *mreq; 1863 struct nameidata fromnd, tond; 1864 struct vnode *fvp, *tvp, *tdvp; 1865 struct vnode *fdirp = NULL, *tdirp = NULL; 1866 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1867 nfsrvfh_t fnsfh, tnsfh; 1868 u_quad_t frev; 1869 uid_t saved_uid; 1870 struct mount *mp = NULL; 1871 1872 #ifndef nolint 1873 fvp = (struct vnode *)0; 1874 #endif 1875 fromnd.ni_cnd.cn_nameiop = 0; 1876 tond.ni_cnd.cn_nameiop = 0; 1877 nfsm_srvmtofh(&fnsfh); 1878 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&fnsfh)->fh_fsid)) == NULL) 1879 return (ESTALE); 1880 vn_start_write(NULL, &mp, V_WAIT); 1881 nfsm_srvnamesiz(len); 1882 /* 1883 * Remember our original uid so that we can reset cr_uid before 1884 * the second nfs_namei() call, in case it is remapped. 1885 */ 1886 saved_uid = kauth_cred_geteuid(cred); 1887 fromnd.ni_cnd.cn_cred = cred; 1888 fromnd.ni_cnd.cn_nameiop = DELETE; 1889 fromnd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 1890 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1891 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1892 if (fdirp && v3) { 1893 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred, lwp); 1894 } 1895 if (error) { 1896 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1897 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1898 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1899 if (fdirp) 1900 vrele(fdirp); 1901 vn_finished_write(mp, 0); 1902 return (0); 1903 } 1904 if (fromnd.ni_dvp != fromnd.ni_vp) { 1905 VOP_UNLOCK(fromnd.ni_dvp, 0); 1906 } 1907 fvp = fromnd.ni_vp; 1908 nfsm_srvmtofh(&tnsfh); 1909 if (v3) { 1910 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1911 len2 = fxdr_unsigned(uint32_t, *tl); 1912 /* len2 will be checked by nfs_namei */ 1913 } 1914 else { 1915 /* NFSv2 */ 1916 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1917 } 1918 kauth_cred_seteuid(cred, saved_uid); 1919 tond.ni_cnd.cn_cred = cred; 1920 tond.ni_cnd.cn_nameiop = RENAME; 1921 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1922 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 1923 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1924 if (tdirp && v3) { 1925 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred, lwp); 1926 } 1927 if (error) { 1928 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1929 vrele(fromnd.ni_dvp); 1930 vrele(fvp); 1931 goto out1; 1932 } 1933 tdvp = tond.ni_dvp; 1934 tvp = tond.ni_vp; 1935 if (tvp != NULL) { 1936 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1937 if (v3) 1938 error = EEXIST; 1939 else 1940 error = EISDIR; 1941 goto out; 1942 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1943 if (v3) 1944 error = EEXIST; 1945 else 1946 error = ENOTDIR; 1947 goto out; 1948 } 1949 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1950 if (v3) 1951 error = EXDEV; 1952 else 1953 error = ENOTEMPTY; 1954 goto out; 1955 } 1956 } 1957 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1958 if (v3) 1959 error = EXDEV; 1960 else 1961 error = ENOTEMPTY; 1962 goto out; 1963 } 1964 if (fvp->v_mount != tdvp->v_mount) { 1965 if (v3) 1966 error = EXDEV; 1967 else 1968 error = ENOTEMPTY; 1969 goto out; 1970 } 1971 if (fvp == tdvp) { 1972 if (v3) 1973 error = EINVAL; 1974 else 1975 error = ENOTEMPTY; 1976 } 1977 /* 1978 * If source is the same as the destination (that is the 1979 * same vnode with the same name in the same directory), 1980 * then there is nothing to do. 1981 */ 1982 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1983 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1984 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1985 fromnd.ni_cnd.cn_namelen)) 1986 error = -1; 1987 out: 1988 if (!error) { 1989 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 1990 nqsrv_getl(tdvp, ND_WRITE); 1991 if (tvp) { 1992 nqsrv_getl(tvp, ND_WRITE); 1993 } 1994 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 1995 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 1996 } else { 1997 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 1998 if (tdvp == tvp) 1999 vrele(tdvp); 2000 else 2001 vput(tdvp); 2002 if (tvp) 2003 vput(tvp); 2004 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2005 vrele(fromnd.ni_dvp); 2006 vrele(fvp); 2007 if (error == -1) 2008 error = 0; 2009 } 2010 vrele(tond.ni_startdir); 2011 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2012 out1: 2013 if (fdirp) { 2014 if (v3) { 2015 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred, lwp); 2016 } 2017 vrele(fdirp); 2018 } 2019 if (tdirp) { 2020 if (v3) { 2021 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred, lwp); 2022 } 2023 vrele(tdirp); 2024 } 2025 vrele(fromnd.ni_startdir); 2026 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2027 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2028 if (v3) { 2029 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2030 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2031 } 2032 vn_finished_write(mp, 0); 2033 return (0); 2034 2035 nfsmout: 2036 if (fdirp) 2037 vrele(fdirp); 2038 #ifdef notdef 2039 if (tdirp) 2040 vrele(tdirp); 2041 #endif 2042 if (tond.ni_cnd.cn_nameiop) { 2043 vrele(tond.ni_startdir); 2044 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2045 } 2046 if (fromnd.ni_cnd.cn_nameiop) { 2047 vrele(fromnd.ni_startdir); 2048 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2049 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2050 vrele(fromnd.ni_dvp); 2051 vrele(fvp); 2052 } 2053 return (error); 2054 } 2055 2056 /* 2057 * nfs link service 2058 */ 2059 int 2060 nfsrv_link(nfsd, slp, lwp, mrq) 2061 struct nfsrv_descript *nfsd; 2062 struct nfssvc_sock *slp; 2063 struct lwp *lwp; 2064 struct mbuf **mrq; 2065 { 2066 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2067 struct mbuf *nam = nfsd->nd_nam; 2068 char *dpos = nfsd->nd_dpos; 2069 kauth_cred_t cred = nfsd->nd_cr; 2070 struct nameidata nd; 2071 u_int32_t *tl; 2072 int32_t t1; 2073 char *bpos; 2074 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2075 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2076 char *cp2; 2077 struct mbuf *mb, *mreq; 2078 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2079 struct vattr dirfor, diraft, at; 2080 nfsrvfh_t nsfh, dnsfh; 2081 u_quad_t frev; 2082 struct mount *mp = NULL; 2083 2084 nfsm_srvmtofh(&nsfh); 2085 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2086 return (ESTALE); 2087 vn_start_write(NULL, &mp, V_WAIT); 2088 nfsm_srvmtofh(&dnsfh); 2089 nfsm_srvnamesiz(len); 2090 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2091 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2092 if (error) { 2093 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2094 nfsm_srvpostop_attr(getret, &at); 2095 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2096 vn_finished_write(mp, 0); 2097 return (0); 2098 } 2099 if (vp->v_type == VDIR && (error = kauth_authorize_generic(cred, 2100 KAUTH_GENERIC_ISSUSER, NULL)) != 0) 2101 goto out1; 2102 nd.ni_cnd.cn_cred = cred; 2103 nd.ni_cnd.cn_nameiop = CREATE; 2104 nd.ni_cnd.cn_flags = LOCKPARENT; 2105 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2106 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2107 if (dirp && v3) { 2108 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2109 } 2110 if (error) 2111 goto out1; 2112 xp = nd.ni_vp; 2113 if (xp != NULL) { 2114 error = EEXIST; 2115 goto out; 2116 } 2117 xp = nd.ni_dvp; 2118 if (vp->v_mount != xp->v_mount) 2119 error = EXDEV; 2120 out: 2121 if (!error) { 2122 nqsrv_getl(vp, ND_WRITE); 2123 nqsrv_getl(xp, ND_WRITE); 2124 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2125 } else { 2126 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2127 if (nd.ni_dvp == nd.ni_vp) 2128 vrele(nd.ni_dvp); 2129 else 2130 vput(nd.ni_dvp); 2131 if (nd.ni_vp) 2132 vrele(nd.ni_vp); 2133 } 2134 out1: 2135 if (v3) 2136 getret = VOP_GETATTR(vp, &at, cred, lwp); 2137 if (dirp) { 2138 if (v3) { 2139 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2140 } 2141 vrele(dirp); 2142 } 2143 vrele(vp); 2144 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2145 if (v3) { 2146 nfsm_srvpostop_attr(getret, &at); 2147 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2148 vn_finished_write(mp, 0); 2149 return (0); 2150 } 2151 vn_finished_write(mp, 0); 2152 nfsm_srvdone; 2153 } 2154 2155 /* 2156 * nfs symbolic link service 2157 */ 2158 int 2159 nfsrv_symlink(nfsd, slp, lwp, mrq) 2160 struct nfsrv_descript *nfsd; 2161 struct nfssvc_sock *slp; 2162 struct lwp *lwp; 2163 struct mbuf **mrq; 2164 { 2165 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2166 struct mbuf *nam = nfsd->nd_nam; 2167 char *dpos = nfsd->nd_dpos; 2168 kauth_cred_t cred = nfsd->nd_cr; 2169 struct vattr va, dirfor, diraft; 2170 struct nameidata nd; 2171 u_int32_t *tl; 2172 int32_t t1; 2173 struct nfsv2_sattr *sp; 2174 char *bpos, *pathcp = NULL, *cp2; 2175 struct uio io; 2176 struct iovec iv; 2177 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1; 2178 uint32_t len, len2; 2179 int v3 = (nfsd->nd_flag & ND_NFSV3); 2180 struct mbuf *mb, *mreq; 2181 struct vnode *dirp = (struct vnode *)0; 2182 nfsrvfh_t nsfh; 2183 u_quad_t frev; 2184 struct mount *mp = NULL; 2185 2186 nd.ni_cnd.cn_nameiop = 0; 2187 nfsm_srvmtofh(&nsfh); 2188 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2189 return (ESTALE); 2190 vn_start_write(NULL, &mp, V_WAIT); 2191 nfsm_srvnamesiz(len); 2192 nd.ni_cnd.cn_cred = cred; 2193 nd.ni_cnd.cn_nameiop = CREATE; 2194 nd.ni_cnd.cn_flags = LOCKPARENT; 2195 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2196 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2197 if (dirp && v3) { 2198 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2199 } 2200 if (error) 2201 goto out; 2202 VATTR_NULL(&va); 2203 va.va_type = VLNK; 2204 if (v3) { 2205 va.va_mode = 0; 2206 nfsm_srvsattr(&va); 2207 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2208 len2 = fxdr_unsigned(uint32_t, *tl); 2209 if (len2 > PATH_MAX) { 2210 /* XXX should check _PC_NO_TRUNC */ 2211 error = ENAMETOOLONG; 2212 goto abortop; 2213 } 2214 } 2215 else { 2216 /* NFSv2 */ 2217 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2218 } 2219 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2220 iv.iov_base = pathcp; 2221 iv.iov_len = len2; 2222 io.uio_resid = len2; 2223 io.uio_offset = 0; 2224 io.uio_iov = &iv; 2225 io.uio_iovcnt = 1; 2226 io.uio_rw = UIO_READ; 2227 UIO_SETUP_SYSSPACE(&io); 2228 nfsm_mtouio(&io, len2); 2229 if (!v3) { 2230 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2231 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2232 } 2233 *(pathcp + len2) = '\0'; 2234 if (nd.ni_vp) { 2235 error = EEXIST; 2236 abortop: 2237 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2238 if (nd.ni_dvp == nd.ni_vp) 2239 vrele(nd.ni_dvp); 2240 else 2241 vput(nd.ni_dvp); 2242 if (nd.ni_vp) 2243 vrele(nd.ni_vp); 2244 goto out; 2245 } 2246 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2247 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2248 if (!error) { 2249 if (v3) { 2250 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2251 if (!error) 2252 error = VOP_GETATTR(nd.ni_vp, &va, cred, lwp); 2253 vput(nd.ni_vp); 2254 } else { 2255 vput(nd.ni_vp); 2256 } 2257 } 2258 out: 2259 if (pathcp) 2260 free(pathcp, M_TEMP); 2261 if (dirp) { 2262 if (v3) { 2263 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2264 } 2265 vrele(dirp); 2266 } 2267 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2268 NFSX_WCCDATA(v3)); 2269 if (v3) { 2270 if (!error) { 2271 nfsm_srvpostop_fh(&nsfh); 2272 nfsm_srvpostop_attr(0, &va); 2273 } 2274 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2275 } 2276 vn_finished_write(mp, 0); 2277 return (0); 2278 nfsmout: 2279 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2280 if (nd.ni_dvp == nd.ni_vp) 2281 vrele(nd.ni_dvp); 2282 else 2283 vput(nd.ni_dvp); 2284 if (nd.ni_vp) 2285 vrele(nd.ni_vp); 2286 if (dirp) 2287 vrele(dirp); 2288 if (pathcp) 2289 free(pathcp, M_TEMP); 2290 vn_finished_write(mp, 0); 2291 return (error); 2292 } 2293 2294 /* 2295 * nfs mkdir service 2296 */ 2297 int 2298 nfsrv_mkdir(nfsd, slp, lwp, mrq) 2299 struct nfsrv_descript *nfsd; 2300 struct nfssvc_sock *slp; 2301 struct lwp *lwp; 2302 struct mbuf **mrq; 2303 { 2304 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2305 struct mbuf *nam = nfsd->nd_nam; 2306 char *dpos = nfsd->nd_dpos; 2307 kauth_cred_t cred = nfsd->nd_cr; 2308 struct vattr va, dirfor, diraft; 2309 struct nfs_fattr *fp; 2310 struct nameidata nd; 2311 char *cp; 2312 u_int32_t *tl; 2313 int32_t t1; 2314 char *bpos; 2315 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2316 int v3 = (nfsd->nd_flag & ND_NFSV3); 2317 char *cp2; 2318 struct mbuf *mb, *mreq; 2319 struct vnode *vp, *dirp = (struct vnode *)0; 2320 nfsrvfh_t nsfh; 2321 u_quad_t frev; 2322 struct mount *mp = NULL; 2323 2324 nfsm_srvmtofh(&nsfh); 2325 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2326 return (ESTALE); 2327 vn_start_write(NULL, &mp, V_WAIT); 2328 nfsm_srvnamesiz(len); 2329 nd.ni_cnd.cn_cred = cred; 2330 nd.ni_cnd.cn_nameiop = CREATE; 2331 nd.ni_cnd.cn_flags = LOCKPARENT; 2332 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2333 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2334 if (dirp && v3) { 2335 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2336 } 2337 if (error) { 2338 nfsm_reply(NFSX_WCCDATA(v3)); 2339 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2340 if (dirp) 2341 vrele(dirp); 2342 vn_finished_write(mp, 0); 2343 return (0); 2344 } 2345 VATTR_NULL(&va); 2346 if (v3) { 2347 va.va_mode = 0; 2348 nfsm_srvsattr(&va); 2349 } else { 2350 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2351 va.va_mode = nfstov_mode(*tl++); 2352 } 2353 va.va_type = VDIR; 2354 vp = nd.ni_vp; 2355 if (vp != NULL) { 2356 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2357 if (nd.ni_dvp == vp) 2358 vrele(nd.ni_dvp); 2359 else 2360 vput(nd.ni_dvp); 2361 vrele(vp); 2362 error = EEXIST; 2363 goto out; 2364 } 2365 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2366 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2367 if (!error) { 2368 vp = nd.ni_vp; 2369 error = nfsrv_composefh(vp, &nsfh, v3); 2370 if (!error) 2371 error = VOP_GETATTR(vp, &va, cred, lwp); 2372 vput(vp); 2373 } 2374 out: 2375 if (dirp) { 2376 if (v3) { 2377 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2378 } 2379 vrele(dirp); 2380 } 2381 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2382 NFSX_WCCDATA(v3)); 2383 if (v3) { 2384 if (!error) { 2385 nfsm_srvpostop_fh(&nsfh); 2386 nfsm_srvpostop_attr(0, &va); 2387 } 2388 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2389 } else { 2390 nfsm_srvfhtom(&nsfh, v3); 2391 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2392 nfsm_srvfillattr(&va, fp); 2393 } 2394 vn_finished_write(mp, 0); 2395 return (0); 2396 nfsmout: 2397 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2398 if (nd.ni_dvp == nd.ni_vp) 2399 vrele(nd.ni_dvp); 2400 else 2401 vput(nd.ni_dvp); 2402 if (nd.ni_vp) 2403 vrele(nd.ni_vp); 2404 if (dirp) 2405 vrele(dirp); 2406 vn_finished_write(mp, 0); 2407 return (error); 2408 } 2409 2410 /* 2411 * nfs rmdir service 2412 */ 2413 int 2414 nfsrv_rmdir(nfsd, slp, lwp, mrq) 2415 struct nfsrv_descript *nfsd; 2416 struct nfssvc_sock *slp; 2417 struct lwp *lwp; 2418 struct mbuf **mrq; 2419 { 2420 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2421 struct mbuf *nam = nfsd->nd_nam; 2422 char *dpos = nfsd->nd_dpos; 2423 kauth_cred_t cred = nfsd->nd_cr; 2424 u_int32_t *tl; 2425 int32_t t1; 2426 char *bpos; 2427 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2428 int v3 = (nfsd->nd_flag & ND_NFSV3); 2429 char *cp2; 2430 struct mbuf *mb, *mreq; 2431 struct vnode *vp, *dirp = (struct vnode *)0; 2432 struct vattr dirfor, diraft; 2433 nfsrvfh_t nsfh; 2434 struct nameidata nd; 2435 u_quad_t frev; 2436 struct mount *mp = NULL; 2437 2438 nfsm_srvmtofh(&nsfh); 2439 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 2440 return (ESTALE); 2441 vn_start_write(NULL, &mp, V_WAIT); 2442 nfsm_srvnamesiz(len); 2443 nd.ni_cnd.cn_cred = cred; 2444 nd.ni_cnd.cn_nameiop = DELETE; 2445 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2446 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2447 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2448 if (dirp && v3) { 2449 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred, lwp); 2450 } 2451 if (error) { 2452 nfsm_reply(NFSX_WCCDATA(v3)); 2453 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2454 if (dirp) 2455 vrele(dirp); 2456 vn_finished_write(mp, 0); 2457 return (0); 2458 } 2459 vp = nd.ni_vp; 2460 if (vp->v_type != VDIR) { 2461 error = ENOTDIR; 2462 goto out; 2463 } 2464 /* 2465 * No rmdir "." please. 2466 */ 2467 if (nd.ni_dvp == vp) { 2468 error = EINVAL; 2469 goto out; 2470 } 2471 /* 2472 * The root of a mounted filesystem cannot be deleted. 2473 */ 2474 if (vp->v_flag & VROOT) 2475 error = EBUSY; 2476 out: 2477 if (!error) { 2478 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2479 nqsrv_getl(vp, ND_WRITE); 2480 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2481 } else { 2482 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2483 if (nd.ni_dvp == nd.ni_vp) 2484 vrele(nd.ni_dvp); 2485 else 2486 vput(nd.ni_dvp); 2487 vput(vp); 2488 } 2489 if (dirp) { 2490 if (v3) { 2491 diraft_ret = VOP_GETATTR(dirp, &diraft, cred, lwp); 2492 } 2493 vrele(dirp); 2494 } 2495 nfsm_reply(NFSX_WCCDATA(v3)); 2496 if (v3) { 2497 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2498 vn_finished_write(mp, 0); 2499 return (0); 2500 } 2501 vn_finished_write(mp, 0); 2502 nfsm_srvdone; 2503 } 2504 2505 /* 2506 * nfs readdir service 2507 * - mallocs what it thinks is enough to read 2508 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2509 * - calls VOP_READDIR() 2510 * - loops around building the reply 2511 * if the output generated exceeds count break out of loop 2512 * The nfsm_clget macro is used here so that the reply will be packed 2513 * tightly in mbuf clusters. 2514 * - it only knows that it has encountered eof when the VOP_READDIR() 2515 * reads nothing 2516 * - as such one readdir rpc will return eof false although you are there 2517 * and then the next will return eof 2518 * - it trims out records with d_fileno == 0 2519 * this doesn't matter for Unix clients, but they might confuse clients 2520 * for other os'. 2521 * - it trims out records with d_type == DT_WHT 2522 * these cannot be seen through NFS (unless we extend the protocol) 2523 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2524 * than requested, but this may not apply to all filesystems. For 2525 * example, client NFS does not { although it is never remote mounted 2526 * anyhow } 2527 * The alternate call nfsrv_readdirplus() does lookups as well. 2528 * PS: The NFS protocol spec. does not clarify what the "count" byte 2529 * argument is a count of.. just name strings and file id's or the 2530 * entire reply rpc or ... 2531 * I tried just file name and id sizes and it confused the Sun client, 2532 * so I am using the full rpc size now. The "paranoia.." comment refers 2533 * to including the status longwords that are not a part of the dir. 2534 * "entry" structures, but are in the rpc. 2535 */ 2536 2537 #define NFS_SRVDIRBLKSIZ 1024 2538 2539 struct flrep { 2540 nfsuint64 fl_off; 2541 u_int32_t fl_postopok; 2542 u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; 2543 u_int32_t fl_fhok; 2544 u_int32_t fl_fhsize; 2545 }; 2546 2547 int 2548 nfsrv_readdir(nfsd, slp, lwp, mrq) 2549 struct nfsrv_descript *nfsd; 2550 struct nfssvc_sock *slp; 2551 struct lwp *lwp; 2552 struct mbuf **mrq; 2553 { 2554 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2555 struct mbuf *nam = nfsd->nd_nam; 2556 char *dpos = nfsd->nd_dpos; 2557 kauth_cred_t cred = nfsd->nd_cr; 2558 char *bp, *be; 2559 struct mbuf *mp; 2560 struct dirent *dp; 2561 char *cp; 2562 u_int32_t *tl; 2563 int32_t t1; 2564 char *bpos; 2565 struct mbuf *mb, *mreq, *mp2; 2566 char *cpos, *cend, *cp2, *rbuf; 2567 struct vnode *vp; 2568 struct vattr at; 2569 nfsrvfh_t nsfh; 2570 struct uio io; 2571 struct iovec iv; 2572 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2573 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2574 int v3 = (nfsd->nd_flag & ND_NFSV3); 2575 u_quad_t frev, off, toff, verf; 2576 off_t *cookies = NULL, *cookiep; 2577 nfsuint64 jar; 2578 2579 nfsm_srvmtofh(&nsfh); 2580 if (v3) { 2581 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2582 toff = fxdr_hyper(tl); 2583 tl += 2; 2584 verf = fxdr_hyper(tl); 2585 tl += 2; 2586 } else { 2587 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2588 toff = fxdr_unsigned(u_quad_t, *tl++); 2589 } 2590 off = toff; 2591 cnt = fxdr_unsigned(int, *tl); 2592 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2593 xfer = NFS_SRVMAXDATA(nfsd); 2594 if (siz > xfer) 2595 siz = xfer; 2596 fullsiz = siz; 2597 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2598 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2599 if (!error && vp->v_type != VDIR) { 2600 error = ENOTDIR; 2601 vput(vp); 2602 } 2603 if (error) { 2604 nfsm_reply(NFSX_UNSIGNED); 2605 nfsm_srvpostop_attr(getret, &at); 2606 return (0); 2607 } 2608 nqsrv_getl(vp, ND_READ); 2609 if (v3) { 2610 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2611 #ifdef NFS3_STRICTVERF 2612 /* 2613 * XXX This check is too strict for Solaris 2.5 clients. 2614 */ 2615 if (!error && toff && verf != at.va_filerev) 2616 error = NFSERR_BAD_COOKIE; 2617 #endif 2618 } 2619 if (!error) 2620 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2621 if (error) { 2622 vput(vp); 2623 nfsm_reply(NFSX_POSTOPATTR(v3)); 2624 nfsm_srvpostop_attr(getret, &at); 2625 return (0); 2626 } 2627 VOP_UNLOCK(vp, 0); 2628 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2629 again: 2630 iv.iov_base = rbuf; 2631 iv.iov_len = fullsiz; 2632 io.uio_iov = &iv; 2633 io.uio_iovcnt = 1; 2634 io.uio_offset = (off_t)off; 2635 io.uio_resid = fullsiz; 2636 io.uio_rw = UIO_READ; 2637 UIO_SETUP_SYSSPACE(&io); 2638 eofflag = 0; 2639 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2640 2641 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2642 2643 off = (off_t)io.uio_offset; 2644 if (!cookies && !error) 2645 error = NFSERR_PERM; 2646 if (v3) { 2647 getret = VOP_GETATTR(vp, &at, cred, lwp); 2648 if (!error) 2649 error = getret; 2650 } 2651 2652 VOP_UNLOCK(vp, 0); 2653 if (error) { 2654 vrele(vp); 2655 free((void *)rbuf, M_TEMP); 2656 if (cookies) 2657 free((void *)cookies, M_TEMP); 2658 nfsm_reply(NFSX_POSTOPATTR(v3)); 2659 nfsm_srvpostop_attr(getret, &at); 2660 return (0); 2661 } 2662 if (io.uio_resid) { 2663 siz -= io.uio_resid; 2664 2665 /* 2666 * If nothing read, return eof 2667 * rpc reply 2668 */ 2669 if (siz == 0) { 2670 vrele(vp); 2671 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2672 2 * NFSX_UNSIGNED); 2673 if (v3) { 2674 nfsm_srvpostop_attr(getret, &at); 2675 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2676 txdr_hyper(at.va_filerev, tl); 2677 tl += 2; 2678 } else 2679 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2680 *tl++ = nfs_false; 2681 *tl = nfs_true; 2682 free((void *)rbuf, M_TEMP); 2683 free((void *)cookies, M_TEMP); 2684 return (0); 2685 } 2686 } 2687 2688 /* 2689 * Check for degenerate cases of nothing useful read. 2690 * If so go try again 2691 */ 2692 cpos = rbuf; 2693 cend = rbuf + siz; 2694 dp = (struct dirent *)cpos; 2695 cookiep = cookies; 2696 2697 while (cpos < cend && ncookies > 0 && 2698 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2699 cpos += dp->d_reclen; 2700 dp = (struct dirent *)cpos; 2701 cookiep++; 2702 ncookies--; 2703 } 2704 if (cpos >= cend || ncookies == 0) { 2705 toff = off; 2706 siz = fullsiz; 2707 free(cookies, M_TEMP); 2708 cookies = NULL; 2709 goto again; 2710 } 2711 2712 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2713 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2714 if (v3) { 2715 nfsm_srvpostop_attr(getret, &at); 2716 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2717 txdr_hyper(at.va_filerev, tl); 2718 } 2719 mp = mp2 = mb; 2720 bp = bpos; 2721 be = bp + M_TRAILINGSPACE(mp); 2722 2723 /* Loop through the records and build reply */ 2724 while (cpos < cend && ncookies > 0) { 2725 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2726 nlen = dp->d_namlen; 2727 rem = nfsm_rndup(nlen)-nlen; 2728 len += (4 * NFSX_UNSIGNED + nlen + rem); 2729 if (v3) 2730 len += 2 * NFSX_UNSIGNED; 2731 if (len > cnt) { 2732 eofflag = 0; 2733 break; 2734 } 2735 /* 2736 * Build the directory record xdr from 2737 * the dirent entry. 2738 */ 2739 nfsm_clget; 2740 *tl = nfs_true; 2741 bp += NFSX_UNSIGNED; 2742 if (v3) { 2743 nfsm_clget; 2744 *tl = txdr_unsigned(dp->d_fileno >> 32); 2745 bp += NFSX_UNSIGNED; 2746 } 2747 nfsm_clget; 2748 *tl = txdr_unsigned(dp->d_fileno); 2749 bp += NFSX_UNSIGNED; 2750 nfsm_clget; 2751 *tl = txdr_unsigned(nlen); 2752 bp += NFSX_UNSIGNED; 2753 2754 /* And loop around copying the name */ 2755 xfer = nlen; 2756 cp = dp->d_name; 2757 while (xfer > 0) { 2758 nfsm_clget; 2759 if ((bp+xfer) > be) 2760 tsiz = be-bp; 2761 else 2762 tsiz = xfer; 2763 memcpy(bp, cp, tsiz); 2764 bp += tsiz; 2765 xfer -= tsiz; 2766 if (xfer > 0) 2767 cp += tsiz; 2768 } 2769 /* And null pad to an int32_t boundary */ 2770 for (i = 0; i < rem; i++) 2771 *bp++ = '\0'; 2772 nfsm_clget; 2773 2774 /* Finish off the record */ 2775 txdr_hyper(*cookiep, &jar); 2776 if (v3) { 2777 *tl = jar.nfsuquad[0]; 2778 bp += NFSX_UNSIGNED; 2779 nfsm_clget; 2780 } 2781 *tl = jar.nfsuquad[1]; 2782 bp += NFSX_UNSIGNED; 2783 } 2784 cpos += dp->d_reclen; 2785 dp = (struct dirent *)cpos; 2786 cookiep++; 2787 ncookies--; 2788 } 2789 vrele(vp); 2790 nfsm_clget; 2791 *tl = nfs_false; 2792 bp += NFSX_UNSIGNED; 2793 nfsm_clget; 2794 if (eofflag) 2795 *tl = nfs_true; 2796 else 2797 *tl = nfs_false; 2798 bp += NFSX_UNSIGNED; 2799 if (mp != mb) { 2800 if (bp < be) 2801 mp->m_len = bp - mtod(mp, char *); 2802 } else 2803 mp->m_len += bp - bpos; 2804 free((void *)rbuf, M_TEMP); 2805 free((void *)cookies, M_TEMP); 2806 nfsm_srvdone; 2807 } 2808 2809 int 2810 nfsrv_readdirplus(nfsd, slp, lwp, mrq) 2811 struct nfsrv_descript *nfsd; 2812 struct nfssvc_sock *slp; 2813 struct lwp *lwp; 2814 struct mbuf **mrq; 2815 { 2816 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2817 struct mbuf *nam = nfsd->nd_nam; 2818 char *dpos = nfsd->nd_dpos; 2819 kauth_cred_t cred = nfsd->nd_cr; 2820 char *bp, *be; 2821 struct mbuf *mp; 2822 struct dirent *dp; 2823 char *cp; 2824 u_int32_t *tl; 2825 int32_t t1; 2826 char *bpos; 2827 struct mbuf *mb, *mreq, *mp2; 2828 char *cpos, *cend, *cp2, *rbuf; 2829 struct vnode *vp, *nvp; 2830 struct flrep fl; 2831 nfsrvfh_t nsfh; 2832 struct uio io; 2833 struct iovec iv; 2834 struct vattr va, at, *vap = &va; 2835 struct nfs_fattr *fp; 2836 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2837 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2838 u_quad_t frev, off, toff, verf; 2839 off_t *cookies = NULL, *cookiep; 2840 2841 nfsm_srvmtofh(&nsfh); 2842 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2843 toff = fxdr_hyper(tl); 2844 tl += 2; 2845 verf = fxdr_hyper(tl); 2846 tl += 2; 2847 siz = fxdr_unsigned(int, *tl++); 2848 cnt = fxdr_unsigned(int, *tl); 2849 off = toff; 2850 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2851 xfer = NFS_SRVMAXDATA(nfsd); 2852 if (siz > xfer) 2853 siz = xfer; 2854 fullsiz = siz; 2855 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2856 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2857 if (!error && vp->v_type != VDIR) { 2858 error = ENOTDIR; 2859 vput(vp); 2860 } 2861 if (error) { 2862 nfsm_reply(NFSX_UNSIGNED); 2863 nfsm_srvpostop_attr(getret, &at); 2864 return (0); 2865 } 2866 error = getret = VOP_GETATTR(vp, &at, cred, lwp); 2867 #ifdef NFS3_STRICTVERF 2868 /* 2869 * XXX This check is too strict for Solaris 2.5 clients. 2870 */ 2871 if (!error && toff && verf != at.va_filerev) 2872 error = NFSERR_BAD_COOKIE; 2873 #endif 2874 if (!error) { 2875 nqsrv_getl(vp, ND_READ); 2876 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2877 } 2878 if (error) { 2879 vput(vp); 2880 nfsm_reply(NFSX_V3POSTOPATTR); 2881 nfsm_srvpostop_attr(getret, &at); 2882 return (0); 2883 } 2884 VOP_UNLOCK(vp, 0); 2885 2886 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2887 again: 2888 iv.iov_base = rbuf; 2889 iv.iov_len = fullsiz; 2890 io.uio_iov = &iv; 2891 io.uio_iovcnt = 1; 2892 io.uio_offset = (off_t)off; 2893 io.uio_resid = fullsiz; 2894 io.uio_rw = UIO_READ; 2895 UIO_SETUP_SYSSPACE(&io); 2896 eofflag = 0; 2897 2898 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2899 2900 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2901 2902 off = (u_quad_t)io.uio_offset; 2903 getret = VOP_GETATTR(vp, &at, cred, lwp); 2904 2905 VOP_UNLOCK(vp, 0); 2906 2907 /* 2908 * If the VGET operation doesn't work for this filesystem, 2909 * we can't support readdirplus. Returning NOTSUPP should 2910 * make clients fall back to plain readdir. 2911 * There's no need to check for VPTOFH as well, we wouldn't 2912 * even be here otherwise. 2913 */ 2914 if (!getret) { 2915 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2916 getret = (getret == EOPNOTSUPP) ? 2917 NFSERR_NOTSUPP : NFSERR_IO; 2918 else 2919 vput(nvp); 2920 } 2921 2922 if (!cookies && !error) 2923 error = NFSERR_PERM; 2924 if (!error) 2925 error = getret; 2926 if (error) { 2927 vrele(vp); 2928 if (cookies) 2929 free((void *)cookies, M_TEMP); 2930 free((void *)rbuf, M_TEMP); 2931 nfsm_reply(NFSX_V3POSTOPATTR); 2932 nfsm_srvpostop_attr(getret, &at); 2933 return (0); 2934 } 2935 if (io.uio_resid) { 2936 siz -= io.uio_resid; 2937 2938 /* 2939 * If nothing read, return eof 2940 * rpc reply 2941 */ 2942 if (siz == 0) { 2943 vrele(vp); 2944 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2945 2 * NFSX_UNSIGNED); 2946 nfsm_srvpostop_attr(getret, &at); 2947 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2948 txdr_hyper(at.va_filerev, tl); 2949 tl += 2; 2950 *tl++ = nfs_false; 2951 *tl = nfs_true; 2952 free((void *)cookies, M_TEMP); 2953 free((void *)rbuf, M_TEMP); 2954 return (0); 2955 } 2956 } 2957 2958 /* 2959 * Check for degenerate cases of nothing useful read. 2960 * If so go try again 2961 */ 2962 cpos = rbuf; 2963 cend = rbuf + siz; 2964 dp = (struct dirent *)cpos; 2965 cookiep = cookies; 2966 2967 while (cpos < cend && ncookies > 0 && 2968 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2969 cpos += dp->d_reclen; 2970 dp = (struct dirent *)cpos; 2971 cookiep++; 2972 ncookies--; 2973 } 2974 if (cpos >= cend || ncookies == 0) { 2975 toff = off; 2976 siz = fullsiz; 2977 free(cookies, M_TEMP); 2978 cookies = NULL; 2979 goto again; 2980 } 2981 2982 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2983 nfsm_reply(cnt); 2984 nfsm_srvpostop_attr(getret, &at); 2985 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2986 txdr_hyper(at.va_filerev, tl); 2987 mp = mp2 = mb; 2988 bp = bpos; 2989 be = bp + M_TRAILINGSPACE(mp); 2990 2991 /* Loop through the records and build reply */ 2992 while (cpos < cend && ncookies > 0) { 2993 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2994 nfsrvfh_t nnsfh; 2995 2996 nlen = dp->d_namlen; 2997 rem = nfsm_rndup(nlen)-nlen; 2998 2999 /* 3000 * For readdir_and_lookup get the vnode using 3001 * the file number. 3002 */ 3003 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 3004 goto invalid; 3005 if (nfsrv_composefh(nvp, &nnsfh, true)) { 3006 vput(nvp); 3007 goto invalid; 3008 } 3009 if (VOP_GETATTR(nvp, vap, cred, lwp)) { 3010 vput(nvp); 3011 goto invalid; 3012 } 3013 vput(nvp); 3014 3015 /* 3016 * If either the dircount or maxcount will be 3017 * exceeded, get out now. Both of these lengths 3018 * are calculated conservatively, including all 3019 * XDR overheads. 3020 */ 3021 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3022 NFSX_V3POSTOPATTR); 3023 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3024 if (len > cnt || dirlen > fullsiz) { 3025 eofflag = 0; 3026 break; 3027 } 3028 3029 /* 3030 * Build the directory record xdr from 3031 * the dirent entry. 3032 */ 3033 fp = (struct nfs_fattr *)&fl.fl_fattr; 3034 nfsm_srvfillattr(vap, fp); 3035 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3036 fl.fl_fhok = nfs_true; 3037 fl.fl_postopok = nfs_true; 3038 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3039 3040 nfsm_clget; 3041 *tl = nfs_true; 3042 bp += NFSX_UNSIGNED; 3043 nfsm_clget; 3044 *tl = txdr_unsigned(dp->d_fileno >> 32); 3045 bp += NFSX_UNSIGNED; 3046 nfsm_clget; 3047 *tl = txdr_unsigned(dp->d_fileno); 3048 bp += NFSX_UNSIGNED; 3049 nfsm_clget; 3050 *tl = txdr_unsigned(nlen); 3051 bp += NFSX_UNSIGNED; 3052 3053 /* And loop around copying the name */ 3054 xfer = nlen; 3055 cp = dp->d_name; 3056 while (xfer > 0) { 3057 nfsm_clget; 3058 if ((bp + xfer) > be) 3059 tsiz = be - bp; 3060 else 3061 tsiz = xfer; 3062 memcpy(bp, cp, tsiz); 3063 bp += tsiz; 3064 xfer -= tsiz; 3065 if (xfer > 0) 3066 cp += tsiz; 3067 } 3068 /* And null pad to an int32_t boundary */ 3069 for (i = 0; i < rem; i++) 3070 *bp++ = '\0'; 3071 3072 /* 3073 * Now copy the flrep structure out. 3074 */ 3075 xfer = sizeof(struct flrep); 3076 cp = (void *)&fl; 3077 while (xfer > 0) { 3078 nfsm_clget; 3079 if ((bp + xfer) > be) 3080 tsiz = be - bp; 3081 else 3082 tsiz = xfer; 3083 memcpy(bp, cp, tsiz); 3084 bp += tsiz; 3085 xfer -= tsiz; 3086 if (xfer > 0) 3087 cp += tsiz; 3088 } 3089 3090 /* 3091 * ... and filehandle. 3092 */ 3093 xfer = NFSRVFH_SIZE(&nnsfh); 3094 cp = NFSRVFH_DATA(&nnsfh); 3095 while (xfer > 0) { 3096 nfsm_clget; 3097 if ((bp + xfer) > be) 3098 tsiz = be - bp; 3099 else 3100 tsiz = xfer; 3101 memcpy(bp, cp, tsiz); 3102 bp += tsiz; 3103 xfer -= tsiz; 3104 if (xfer > 0) 3105 cp += tsiz; 3106 } 3107 } 3108 invalid: 3109 cpos += dp->d_reclen; 3110 dp = (struct dirent *)cpos; 3111 cookiep++; 3112 ncookies--; 3113 } 3114 vrele(vp); 3115 nfsm_clget; 3116 *tl = nfs_false; 3117 bp += NFSX_UNSIGNED; 3118 nfsm_clget; 3119 if (eofflag) 3120 *tl = nfs_true; 3121 else 3122 *tl = nfs_false; 3123 bp += NFSX_UNSIGNED; 3124 if (mp != mb) { 3125 if (bp < be) 3126 mp->m_len = bp - mtod(mp, char *); 3127 } else 3128 mp->m_len += bp - bpos; 3129 free((void *)cookies, M_TEMP); 3130 free((void *)rbuf, M_TEMP); 3131 nfsm_srvdone; 3132 } 3133 3134 /* 3135 * nfs commit service 3136 */ 3137 int 3138 nfsrv_commit(nfsd, slp, lwp, mrq) 3139 struct nfsrv_descript *nfsd; 3140 struct nfssvc_sock *slp; 3141 struct lwp *lwp; 3142 struct mbuf **mrq; 3143 { 3144 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3145 struct mbuf *nam = nfsd->nd_nam; 3146 char *dpos = nfsd->nd_dpos; 3147 kauth_cred_t cred = nfsd->nd_cr; 3148 struct vattr bfor, aft; 3149 struct vnode *vp; 3150 nfsrvfh_t nsfh; 3151 u_int32_t *tl; 3152 int32_t t1; 3153 char *bpos; 3154 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3155 uint32_t cnt; 3156 char *cp2; 3157 struct mbuf *mb, *mreq; 3158 u_quad_t frev, off, end; 3159 struct mount *mp = NULL; 3160 3161 nfsm_srvmtofh(&nsfh); 3162 if ((mp = vfs_getvfs(&NFSRVFH_FHANDLE(&nsfh)->fh_fsid)) == NULL) 3163 return (ESTALE); 3164 vn_start_write(NULL, &mp, V_WAIT); 3165 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3166 3167 off = fxdr_hyper(tl); 3168 tl += 2; 3169 cnt = fxdr_unsigned(uint32_t, *tl); 3170 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3171 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3172 if (error) { 3173 nfsm_reply(2 * NFSX_UNSIGNED); 3174 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3175 vn_finished_write(mp, 0); 3176 return (0); 3177 } 3178 for_ret = VOP_GETATTR(vp, &bfor, cred, lwp); 3179 end = (cnt > 0) ? off + cnt : vp->v_size; 3180 if (end < off || end > vp->v_size) 3181 end = vp->v_size; 3182 if (off < vp->v_size) 3183 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end, lwp); 3184 /* else error == 0, from nfsrv_fhtovp() */ 3185 aft_ret = VOP_GETATTR(vp, &aft, cred, lwp); 3186 vput(vp); 3187 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3188 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3189 if (!error) { 3190 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3191 *tl++ = txdr_unsigned(boottime.tv_sec); 3192 *tl = txdr_unsigned(boottime.tv_usec); 3193 } else { 3194 vn_finished_write(mp, 0); 3195 return (0); 3196 } 3197 vn_finished_write(mp, 0); 3198 nfsm_srvdone; 3199 } 3200 3201 /* 3202 * nfs statfs service 3203 */ 3204 int 3205 nfsrv_statfs(nfsd, slp, lwp, mrq) 3206 struct nfsrv_descript *nfsd; 3207 struct nfssvc_sock *slp; 3208 struct lwp *lwp; 3209 struct mbuf **mrq; 3210 { 3211 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3212 struct mbuf *nam = nfsd->nd_nam; 3213 char *dpos = nfsd->nd_dpos; 3214 kauth_cred_t cred = nfsd->nd_cr; 3215 struct statvfs *sf = NULL; 3216 struct nfs_statfs *sfp; 3217 u_int32_t *tl; 3218 int32_t t1; 3219 char *bpos; 3220 int error = 0, rdonly, cache = 0, getret = 1; 3221 int v3 = (nfsd->nd_flag & ND_NFSV3); 3222 char *cp2; 3223 struct mbuf *mb, *mreq; 3224 struct vnode *vp; 3225 struct vattr at; 3226 nfsrvfh_t nsfh; 3227 u_quad_t frev, tval; 3228 3229 nfsm_srvmtofh(&nsfh); 3230 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3231 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3232 if (error) { 3233 nfsm_reply(NFSX_UNSIGNED); 3234 nfsm_srvpostop_attr(getret, &at); 3235 return (0); 3236 } 3237 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3238 error = VFS_STATVFS(vp->v_mount, sf, lwp); 3239 getret = VOP_GETATTR(vp, &at, cred, lwp); 3240 vput(vp); 3241 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3242 if (v3) 3243 nfsm_srvpostop_attr(getret, &at); 3244 if (error) { 3245 free(sf, M_TEMP); 3246 return (0); 3247 } 3248 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3249 if (v3) { 3250 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3251 txdr_hyper(tval, &sfp->sf_tbytes); 3252 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3253 txdr_hyper(tval, &sfp->sf_fbytes); 3254 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3255 txdr_hyper(tval, &sfp->sf_abytes); 3256 tval = (u_quad_t)sf->f_files; 3257 txdr_hyper(tval, &sfp->sf_tfiles); 3258 tval = (u_quad_t)sf->f_ffree; 3259 txdr_hyper(tval, &sfp->sf_ffiles); 3260 txdr_hyper(tval, &sfp->sf_afiles); 3261 sfp->sf_invarsec = 0; 3262 } else { 3263 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3264 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3265 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3266 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3267 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3268 } 3269 nfsmout: 3270 if (sf) 3271 free(sf, M_TEMP); 3272 return error; 3273 } 3274 3275 /* 3276 * nfs fsinfo service 3277 */ 3278 int 3279 nfsrv_fsinfo(nfsd, slp, lwp, mrq) 3280 struct nfsrv_descript *nfsd; 3281 struct nfssvc_sock *slp; 3282 struct lwp *lwp; 3283 struct mbuf **mrq; 3284 { 3285 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3286 struct mbuf *nam = nfsd->nd_nam; 3287 char *dpos = nfsd->nd_dpos; 3288 kauth_cred_t cred = nfsd->nd_cr; 3289 u_int32_t *tl; 3290 struct nfsv3_fsinfo *sip; 3291 int32_t t1; 3292 char *bpos; 3293 int error = 0, rdonly, cache = 0, getret = 1; 3294 uint32_t maxdata; 3295 char *cp2; 3296 struct mbuf *mb, *mreq; 3297 struct vnode *vp; 3298 struct vattr at; 3299 nfsrvfh_t nsfh; 3300 u_quad_t frev, maxfsize; 3301 struct statvfs *sb; 3302 3303 nfsm_srvmtofh(&nsfh); 3304 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3305 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3306 if (error) { 3307 nfsm_reply(NFSX_UNSIGNED); 3308 nfsm_srvpostop_attr(getret, &at); 3309 return (0); 3310 } 3311 3312 /* XXX Try to make a guess on the max file size. */ 3313 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3314 VFS_STATVFS(vp->v_mount, sb, (struct lwp *)0); 3315 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3316 free(sb, M_TEMP); 3317 3318 getret = VOP_GETATTR(vp, &at, cred, lwp); 3319 vput(vp); 3320 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3321 nfsm_srvpostop_attr(getret, &at); 3322 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3323 3324 /* 3325 * XXX 3326 * There should be file system VFS OP(s) to get this information. 3327 * For now, assume ufs. 3328 */ 3329 if (slp->ns_so->so_type == SOCK_DGRAM) 3330 maxdata = NFS_MAXDGRAMDATA; 3331 else 3332 maxdata = NFS_MAXDATA; 3333 sip->fs_rtmax = txdr_unsigned(maxdata); 3334 sip->fs_rtpref = txdr_unsigned(maxdata); 3335 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3336 sip->fs_wtmax = txdr_unsigned(maxdata); 3337 sip->fs_wtpref = txdr_unsigned(maxdata); 3338 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3339 sip->fs_dtpref = txdr_unsigned(maxdata); 3340 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3341 sip->fs_timedelta.nfsv3_sec = 0; 3342 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3343 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3344 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3345 NFSV3FSINFO_CANSETTIME); 3346 nfsm_srvdone; 3347 } 3348 3349 /* 3350 * nfs pathconf service 3351 */ 3352 int 3353 nfsrv_pathconf(nfsd, slp, lwp, mrq) 3354 struct nfsrv_descript *nfsd; 3355 struct nfssvc_sock *slp; 3356 struct lwp *lwp; 3357 struct mbuf **mrq; 3358 { 3359 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3360 struct mbuf *nam = nfsd->nd_nam; 3361 char *dpos = nfsd->nd_dpos; 3362 kauth_cred_t cred = nfsd->nd_cr; 3363 u_int32_t *tl; 3364 struct nfsv3_pathconf *pc; 3365 int32_t t1; 3366 char *bpos; 3367 int error = 0, rdonly, cache = 0, getret = 1; 3368 register_t linkmax, namemax, chownres, notrunc; 3369 char *cp2; 3370 struct mbuf *mb, *mreq; 3371 struct vnode *vp; 3372 struct vattr at; 3373 nfsrvfh_t nsfh; 3374 u_quad_t frev; 3375 3376 nfsm_srvmtofh(&nsfh); 3377 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3378 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3379 if (error) { 3380 nfsm_reply(NFSX_UNSIGNED); 3381 nfsm_srvpostop_attr(getret, &at); 3382 return (0); 3383 } 3384 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3385 if (!error) 3386 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3387 if (!error) 3388 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3389 if (!error) 3390 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3391 getret = VOP_GETATTR(vp, &at, cred, lwp); 3392 vput(vp); 3393 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3394 nfsm_srvpostop_attr(getret, &at); 3395 if (error) 3396 return (0); 3397 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3398 3399 pc->pc_linkmax = txdr_unsigned(linkmax); 3400 pc->pc_namemax = txdr_unsigned(namemax); 3401 pc->pc_notrunc = txdr_unsigned(notrunc); 3402 pc->pc_chownrestricted = txdr_unsigned(chownres); 3403 3404 /* 3405 * These should probably be supported by VOP_PATHCONF(), but 3406 * until msdosfs is exportable (why would you want to?), the 3407 * Unix defaults should be ok. 3408 */ 3409 pc->pc_caseinsensitive = nfs_false; 3410 pc->pc_casepreserving = nfs_true; 3411 nfsm_srvdone; 3412 } 3413 3414 /* 3415 * Null operation, used by clients to ping server 3416 */ 3417 /* ARGSUSED */ 3418 int 3419 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3420 struct lwp *lwp, struct mbuf **mrq) 3421 { 3422 struct mbuf *mrep = nfsd->nd_mrep; 3423 char *bpos; 3424 int error = NFSERR_RETVOID, cache = 0; 3425 struct mbuf *mb, *mreq; 3426 u_quad_t frev; 3427 3428 nfsm_reply(0); 3429 return (0); 3430 } 3431 3432 /* 3433 * No operation, used for obsolete procedures 3434 */ 3435 /* ARGSUSED */ 3436 int 3437 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3438 struct lwp *lwp, struct mbuf **mrq) 3439 { 3440 struct mbuf *mrep = nfsd->nd_mrep; 3441 char *bpos; 3442 int error, cache = 0; 3443 struct mbuf *mb, *mreq; 3444 u_quad_t frev; 3445 3446 if (nfsd->nd_repstat) 3447 error = nfsd->nd_repstat; 3448 else 3449 error = EPROCUNAVAIL; 3450 nfsm_reply(0); 3451 return (0); 3452 } 3453 3454 /* 3455 * Perform access checking for vnodes obtained from file handles that would 3456 * refer to files already opened by a Unix client. You cannot just use 3457 * vn_writechk() and VOP_ACCESS() for two reasons. 3458 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3459 * 2 - The owner is to be given access irrespective of mode bits for some 3460 * operations, so that processes that chmod after opening a file don't 3461 * break. I don't like this because it opens a security hole, but since 3462 * the nfs server opens a security hole the size of a barn door anyhow, 3463 * what the heck. 3464 * 3465 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3466 * will return EPERM instead of EACCESS. EPERM is always an error. 3467 */ 3468 int 3469 nfsrv_access(vp, flags, cred, rdonly, lwp, override) 3470 struct vnode *vp; 3471 int flags; 3472 kauth_cred_t cred; 3473 int rdonly; 3474 struct lwp *lwp; 3475 int override; 3476 { 3477 struct vattr vattr; 3478 int error; 3479 if (flags & VWRITE) { 3480 /* Just vn_writechk() changed to check rdonly */ 3481 /* 3482 * Disallow write attempts on read-only file systems; 3483 * unless the file is a socket or a block or character 3484 * device resident on the file system. 3485 */ 3486 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3487 switch (vp->v_type) { 3488 case VREG: 3489 case VDIR: 3490 case VLNK: 3491 return (EROFS); 3492 default: 3493 break; 3494 } 3495 } 3496 3497 /* 3498 * If the vnode is in use as a process's text, 3499 * we can't allow writing. 3500 */ 3501 if (vp->v_flag & VTEXT) 3502 return (ETXTBSY); 3503 } 3504 error = VOP_GETATTR(vp, &vattr, cred, lwp); 3505 if (error) 3506 return (error); 3507 error = VOP_ACCESS(vp, flags, cred, lwp); 3508 /* 3509 * Allow certain operations for the owner (reads and writes 3510 * on files that are already open). 3511 */ 3512 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3513 error = 0; 3514 return error; 3515 } 3516
Indexes created Thu Sep 25 16:09:42 GMT 2025