nfs_serv.c revision 1.145
1 /* $NetBSD: nfs_serv.c,v 1.145 2009/05/23 14:45:18 ad 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 1.145 2009/05/23 14:45:18 ad 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 #include <sys/module.h> 76 #include <sys/syscall.h> 77 #include <sys/syscallargs.h> 78 #include <sys/syscallvar.h> 79 80 #include <uvm/uvm.h> 81 82 #include <nfs/nfsproto.h> 83 #include <nfs/rpcv2.h> 84 #include <nfs/nfs.h> 85 #include <nfs/xdr_subs.h> 86 #include <nfs/nfsm_subs.h> 87 #include <nfs/nfs_var.h> 88 89 MODULE(MODULE_CLASS_MISC, nfsserver, "nfs"); 90 91 /* Global vars */ 92 extern u_int32_t nfs_xdrneg1; 93 extern u_int32_t nfs_false, nfs_true; 94 extern const enum vtype nv3tov_type[8]; 95 extern struct nfsstats nfsstats; 96 extern const nfstype nfsv2_type[9]; 97 extern const nfstype nfsv3_type[9]; 98 int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; 99 bool nfsd_use_loan = true; /* use page-loan for READ OP */ 100 101 #define nqsrv_getl(vp, rw) /* nothing */ 102 103 static const struct syscall_package nfsserver_syscalls[] = { 104 { SYS_nfssvc, 0, (sy_call_t *)sys_nfssvc }, 105 { 0, 0, NULL }, 106 }; 107 108 static int 109 nfsserver_modcmd(modcmd_t cmd, void *arg) 110 { 111 extern krwlock_t netexport_lock; /* XXX */ 112 extern struct vfs_hooks nfs_export_hooks; /* XXX */ 113 int error; 114 115 switch (cmd) { 116 case MODULE_CMD_INIT: 117 error = syscall_establish(NULL, nfsserver_syscalls); 118 if (error != 0) { 119 return error; 120 } 121 nfs_init(); /* XXX for monolithic kernel */ 122 rw_init(&netexport_lock); 123 nfsrv_initcache(); /* Init the server request cache */ 124 nfsrv_init(0); /* Init server data structures */ 125 vfs_hooks_attach(&nfs_export_hooks); 126 nfs_timer_srvinit(nfsrv_timer); 127 return 0; 128 case MODULE_CMD_FINI: 129 error = syscall_disestablish(NULL, nfsserver_syscalls); 130 if (error != 0) { 131 return error; 132 } 133 nfs_timer_srvfini(); 134 vfs_hooks_detach(&nfs_export_hooks); 135 nfsrv_fini(); 136 nfsrv_finicache(); 137 rw_destroy(&netexport_lock); 138 return 0; 139 default: 140 return ENOTTY; 141 } 142 } 143 144 /* 145 * nfs v3 access service 146 */ 147 int 148 nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 149 { 150 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 151 struct mbuf *nam = nfsd->nd_nam; 152 char *dpos = nfsd->nd_dpos; 153 kauth_cred_t cred = nfsd->nd_cr; 154 struct vnode *vp; 155 nfsrvfh_t nsfh; 156 u_int32_t *tl; 157 int32_t t1; 158 char *bpos; 159 int error = 0, rdonly, cache = 0, getret; 160 char *cp2; 161 struct mbuf *mb, *mreq; 162 struct vattr va; 163 u_long inmode, testmode, outmode; 164 u_quad_t frev; 165 166 nfsm_srvmtofh(&nsfh); 167 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 168 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 169 (nfsd->nd_flag & ND_KERBAUTH), false); 170 if (error) { 171 nfsm_reply(NFSX_UNSIGNED); 172 nfsm_srvpostop_attr(1, (struct vattr *)0); 173 return (0); 174 } 175 inmode = fxdr_unsigned(u_int32_t, *tl); 176 outmode = 0; 177 if ((inmode & NFSV3ACCESS_READ) && 178 nfsrv_access(vp, VREAD, cred, rdonly, lwp, 0) == 0) 179 outmode |= NFSV3ACCESS_READ; 180 if (vp->v_type != VDIR) { 181 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 182 if (testmode && 183 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 184 outmode |= testmode; 185 if ((inmode & NFSV3ACCESS_EXECUTE) && 186 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 187 outmode |= NFSV3ACCESS_EXECUTE; 188 } else { 189 testmode = inmode & (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 190 NFSV3ACCESS_DELETE); 191 if (testmode && 192 nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 0) == 0) 193 outmode |= testmode; 194 if ((inmode & NFSV3ACCESS_LOOKUP) && 195 nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0) == 0) 196 outmode |= NFSV3ACCESS_LOOKUP; 197 } 198 getret = VOP_GETATTR(vp, &va, cred); 199 vput(vp); 200 nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); 201 nfsm_srvpostop_attr(getret, &va); 202 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 203 *tl = txdr_unsigned(outmode); 204 nfsm_srvdone; 205 } 206 207 /* 208 * nfs getattr service 209 */ 210 int 211 nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 212 { 213 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 214 struct mbuf *nam = nfsd->nd_nam; 215 char *dpos = nfsd->nd_dpos; 216 kauth_cred_t cred = nfsd->nd_cr; 217 struct nfs_fattr *fp; 218 struct vattr va; 219 struct vnode *vp; 220 nfsrvfh_t nsfh; 221 u_int32_t *tl; 222 int32_t t1; 223 char *bpos; 224 int error = 0, rdonly, cache = 0; 225 char *cp2; 226 struct mbuf *mb, *mreq; 227 u_quad_t frev; 228 229 nfsm_srvmtofh(&nsfh); 230 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 231 (nfsd->nd_flag & ND_KERBAUTH), false); 232 if (error) { 233 nfsm_reply(0); 234 return (0); 235 } 236 nqsrv_getl(vp, ND_READ); 237 error = VOP_GETATTR(vp, &va, cred); 238 vput(vp); 239 nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 240 if (error) 241 return (0); 242 nfsm_build(fp, struct nfs_fattr *, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); 243 nfsm_srvfillattr(&va, fp); 244 nfsm_srvdone; 245 } 246 247 /* 248 * nfs setattr service 249 */ 250 int 251 nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 252 { 253 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 254 struct mbuf *nam = nfsd->nd_nam; 255 char *dpos = nfsd->nd_dpos; 256 kauth_cred_t cred = nfsd->nd_cr; 257 struct vattr va, preat; 258 struct nfsv2_sattr *sp; 259 struct nfs_fattr *fp; 260 struct vnode *vp; 261 nfsrvfh_t nsfh; 262 u_int32_t *tl; 263 int32_t t1; 264 char *bpos; 265 int error = 0, rdonly, cache = 0, preat_ret = 1, postat_ret = 1; 266 int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; 267 char *cp2; 268 struct mbuf *mb, *mreq; 269 u_quad_t frev; 270 struct timespec guard; 271 272 memset(&guard, 0, sizeof guard); /* XXX gcc */ 273 274 nfsm_srvmtofh(&nsfh); 275 VATTR_NULL(&va); 276 if (v3) { 277 nfsm_srvsattr(&va); 278 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 279 gcheck = fxdr_unsigned(int, *tl); 280 if (gcheck) { 281 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 282 fxdr_nfsv3time(tl, &guard); 283 } 284 } else { 285 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 286 /* 287 * Nah nah nah nah na nah 288 * There is a bug in the Sun client that puts 0xffff in the mode 289 * field of sattr when it should put in 0xffffffff. The u_short 290 * doesn't sign extend. 291 * --> check the low order 2 bytes for 0xffff 292 */ 293 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 294 va.va_mode = nfstov_mode(sp->sa_mode); 295 if (sp->sa_uid != nfs_xdrneg1) 296 va.va_uid = fxdr_unsigned(uid_t, sp->sa_uid); 297 if (sp->sa_gid != nfs_xdrneg1) 298 va.va_gid = fxdr_unsigned(gid_t, sp->sa_gid); 299 if (sp->sa_size != nfs_xdrneg1) 300 va.va_size = fxdr_unsigned(u_quad_t, sp->sa_size); 301 if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { 302 #ifdef notyet 303 fxdr_nfsv2time(&sp->sa_atime, &va.va_atime); 304 #else 305 va.va_atime.tv_sec = 306 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 307 va.va_atime.tv_nsec = 0; 308 #endif 309 } 310 if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) 311 fxdr_nfsv2time(&sp->sa_mtime, &va.va_mtime); 312 313 } 314 315 /* 316 * Now that we have all the fields, lets do it. 317 */ 318 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, &rdonly, 319 (nfsd->nd_flag & ND_KERBAUTH), false); 320 if (error) { 321 nfsm_reply(2 * NFSX_UNSIGNED); 322 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 323 return (0); 324 } 325 nqsrv_getl(vp, ND_WRITE); 326 if (v3) { 327 error = preat_ret = VOP_GETATTR(vp, &preat, cred); 328 if (!error && gcheck && 329 (preat.va_ctime.tv_sec != guard.tv_sec || 330 preat.va_ctime.tv_nsec != guard.tv_nsec)) 331 error = NFSERR_NOT_SYNC; 332 if (error) { 333 vput(vp); 334 nfsm_reply(NFSX_WCCDATA(v3)); 335 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 336 return (0); 337 } 338 } 339 340 /* 341 * If the size is being changed write acces is required, otherwise 342 * just check for a read only file system. 343 */ 344 if (va.va_size == ((u_quad_t)((quad_t) -1))) { 345 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 346 error = EROFS; 347 goto out; 348 } 349 } else { 350 if (vp->v_type == VDIR) { 351 error = EISDIR; 352 goto out; 353 } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, 354 lwp, 0)) != 0) 355 goto out; 356 } 357 error = VOP_SETATTR(vp, &va, cred); 358 postat_ret = VOP_GETATTR(vp, &va, cred); 359 if (!error) 360 error = postat_ret; 361 out: 362 vput(vp); 363 nfsm_reply(NFSX_WCCORFATTR(v3)); 364 if (v3) { 365 nfsm_srvwcc_data(preat_ret, &preat, postat_ret, &va); 366 return (0); 367 } else { 368 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 369 nfsm_srvfillattr(&va, fp); 370 } 371 nfsm_srvdone; 372 } 373 374 /* 375 * nfs lookup rpc 376 */ 377 int 378 nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 379 { 380 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 381 struct mbuf *nam = nfsd->nd_nam; 382 char *dpos = nfsd->nd_dpos; 383 kauth_cred_t cred = nfsd->nd_cr; 384 struct nfs_fattr *fp; 385 struct nameidata nd, ind, *ndp = &nd; 386 struct vnode *vp, *dirp; 387 nfsrvfh_t nsfh; 388 char *cp; 389 u_int32_t *tl; 390 int32_t t1; 391 char *bpos; 392 int error = 0, cache = 0, dirattr_ret = 1; 393 uint32_t len; 394 int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; 395 char *cp2; 396 struct mbuf *mb, *mreq; 397 struct vattr va, dirattr; 398 u_quad_t frev; 399 400 nfsm_srvmtofh(&nsfh); 401 nfsm_srvnamesiz(len); 402 403 pubflag = nfs_ispublicfh(&nsfh); 404 405 nd.ni_cnd.cn_cred = cred; 406 nd.ni_cnd.cn_nameiop = LOOKUP; 407 nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; 408 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 409 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), pubflag); 410 411 if (!error && pubflag) { 412 if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { 413 /* 414 * Setup call to lookup() to see if we can find 415 * the index file. Arguably, this doesn't belong 416 * in a kernel.. Ugh. 417 */ 418 ind = nd; 419 VOP_UNLOCK(nd.ni_vp, 0); 420 ind.ni_pathlen = strlen(nfs_pub.np_index); 421 ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = 422 nfs_pub.np_index; 423 ind.ni_startdir = nd.ni_vp; 424 VREF(ind.ni_startdir); 425 error = lookup(&ind); 426 if (!error) { 427 /* 428 * Found an index file. Get rid of 429 * the old references. 430 */ 431 if (dirp) 432 vrele(dirp); 433 dirp = nd.ni_vp; 434 vrele(nd.ni_startdir); 435 ndp = &ind; 436 } else 437 error = 0; 438 } 439 /* 440 * If the public filehandle was used, check that this lookup 441 * didn't result in a filehandle outside the publicly exported 442 * filesystem. 443 */ 444 445 if (!error && ndp->ni_vp->v_mount != nfs_pub.np_mount) { 446 vput(nd.ni_vp); 447 error = EPERM; 448 } 449 } 450 451 if (dirp) { 452 if (v3) 453 dirattr_ret = VOP_GETATTR(dirp, &dirattr, cred); 454 vrele(dirp); 455 } 456 457 if (error) { 458 nfsm_reply(NFSX_POSTOPATTR(v3)); 459 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 460 return (0); 461 } 462 463 nqsrv_getl(ndp->ni_startdir, ND_READ); 464 PNBUF_PUT(nd.ni_cnd.cn_pnbuf); 465 vp = ndp->ni_vp; 466 error = nfsrv_composefh(vp, &nsfh, v3); 467 if (!error) 468 error = VOP_GETATTR(vp, &va, cred); 469 vput(vp); 470 vrele(ndp->ni_startdir); 471 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPORFATTR(v3) + 472 NFSX_POSTOPATTR(v3)); 473 if (error) { 474 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 475 return (0); 476 } 477 nfsm_srvfhtom(&nsfh, v3); 478 if (v3) { 479 nfsm_srvpostop_attr(0, &va); 480 nfsm_srvpostop_attr(dirattr_ret, &dirattr); 481 } else { 482 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 483 nfsm_srvfillattr(&va, fp); 484 } 485 nfsm_srvdone; 486 } 487 488 /* 489 * nfs readlink service 490 */ 491 int 492 nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 493 { 494 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 495 struct mbuf *nam = nfsd->nd_nam; 496 char *dpos = nfsd->nd_dpos; 497 kauth_cred_t cred = nfsd->nd_cr; 498 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 499 struct iovec *ivp = iv; 500 struct mbuf *mp; 501 u_int32_t *tl; 502 int32_t t1; 503 char *bpos; 504 int error = 0, rdonly, cache = 0, i, padlen, getret; 505 uint32_t len; 506 int v3 = (nfsd->nd_flag & ND_NFSV3); 507 char *cp2; 508 struct mbuf *mb, *mp2 = NULL, *mp3 = NULL, *mreq; 509 struct vnode *vp; 510 struct vattr attr; 511 nfsrvfh_t nsfh; 512 struct uio io, *uiop = &io; 513 u_quad_t frev; 514 515 nfsm_srvmtofh(&nsfh); 516 len = 0; 517 i = 0; 518 while (len < NFS_MAXPATHLEN) { 519 mp = m_get(M_WAIT, MT_DATA); 520 MCLAIM(mp, &nfs_mowner); 521 m_clget(mp, M_WAIT); 522 mp->m_len = NFSMSIZ(mp); 523 if (len == 0) 524 mp3 = mp2 = mp; 525 else { 526 mp2->m_next = mp; 527 mp2 = mp; 528 } 529 if ((len+mp->m_len) > NFS_MAXPATHLEN) { 530 mp->m_len = NFS_MAXPATHLEN-len; 531 len = NFS_MAXPATHLEN; 532 } else 533 len += mp->m_len; 534 ivp->iov_base = mtod(mp, void *); 535 ivp->iov_len = mp->m_len; 536 i++; 537 ivp++; 538 } 539 uiop->uio_iov = iv; 540 uiop->uio_iovcnt = i; 541 uiop->uio_offset = 0; 542 uiop->uio_resid = len; 543 uiop->uio_rw = UIO_READ; 544 UIO_SETUP_SYSSPACE(uiop); 545 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 546 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 547 if (error) { 548 m_freem(mp3); 549 nfsm_reply(2 * NFSX_UNSIGNED); 550 nfsm_srvpostop_attr(1, (struct vattr *)0); 551 return (0); 552 } 553 if (vp->v_type != VLNK) { 554 if (v3) 555 error = EINVAL; 556 else 557 error = ENXIO; 558 goto out; 559 } 560 nqsrv_getl(vp, ND_READ); 561 error = VOP_READLINK(vp, uiop, cred); 562 out: 563 getret = VOP_GETATTR(vp, &attr, cred); 564 vput(vp); 565 if (error) 566 m_freem(mp3); 567 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); 568 if (v3) { 569 nfsm_srvpostop_attr(getret, &attr); 570 if (error) 571 return (0); 572 } 573 len -= uiop->uio_resid; 574 padlen = nfsm_padlen(len); 575 if (uiop->uio_resid || padlen) 576 nfs_zeropad(mp3, uiop->uio_resid, padlen); 577 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 578 *tl = txdr_unsigned(len); 579 mb->m_next = mp3; 580 nfsm_srvdone; 581 } 582 583 /* 584 * nfs read service 585 */ 586 int 587 nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 588 { 589 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 590 struct mbuf *nam = nfsd->nd_nam; 591 char *dpos = nfsd->nd_dpos; 592 kauth_cred_t cred = nfsd->nd_cr; 593 struct mbuf *m; 594 struct nfs_fattr *fp; 595 u_int32_t *tl; 596 int32_t t1; 597 int i; 598 char *bpos; 599 int error = 0, rdonly, cache = 0, getret; 600 int v3 = (nfsd->nd_flag & ND_NFSV3); 601 uint32_t reqlen, len, cnt, left; 602 int padlen; 603 char *cp2; 604 struct mbuf *mb, *mreq; 605 struct vnode *vp; 606 nfsrvfh_t nsfh; 607 struct uio io, *uiop = &io; 608 struct vattr va; 609 off_t off; 610 u_quad_t frev; 611 612 nfsm_srvmtofh(&nsfh); 613 if (v3) { 614 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 615 off = fxdr_hyper(tl); 616 } else { 617 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 618 off = (off_t)fxdr_unsigned(u_int32_t, *tl); 619 } 620 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 621 reqlen = fxdr_unsigned(uint32_t, *tl); 622 reqlen = MIN(reqlen, NFS_SRVMAXDATA(nfsd)); 623 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 624 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 625 if (error) { 626 nfsm_reply(2 * NFSX_UNSIGNED); 627 nfsm_srvpostop_attr(1, (struct vattr *)0); 628 return (0); 629 } 630 if (vp->v_type != VREG) { 631 if (v3) 632 error = EINVAL; 633 else 634 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 635 } 636 if (!error) { 637 nqsrv_getl(vp, ND_READ); 638 if ((error = nfsrv_access(vp, VREAD, cred, rdonly, lwp, 1)) != 0) 639 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 1); 640 } 641 getret = VOP_GETATTR(vp, &va, cred); 642 if (!error) 643 error = getret; 644 if (error) { 645 vput(vp); 646 nfsm_reply(NFSX_POSTOPATTR(v3)); 647 nfsm_srvpostop_attr(getret, &va); 648 return (0); 649 } 650 if (off >= va.va_size) 651 cnt = 0; 652 else if ((off + reqlen) > va.va_size) 653 cnt = va.va_size - off; 654 else 655 cnt = reqlen; 656 nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); 657 if (v3) { 658 nfsm_build(tl, u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); 659 *tl++ = nfs_true; 660 fp = (struct nfs_fattr *)tl; 661 tl += (NFSX_V3FATTR / sizeof (u_int32_t)); 662 } else { 663 nfsm_build(tl, u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); 664 fp = (struct nfs_fattr *)tl; 665 tl += (NFSX_V2FATTR / sizeof (u_int32_t)); 666 } 667 len = left = cnt; 668 if (cnt > 0) { 669 if (nfsd_use_loan) { 670 struct vm_page **pgpp; 671 voff_t pgoff = trunc_page(off); 672 int npages; 673 vaddr_t lva; 674 675 npages = (round_page(off + cnt) - pgoff) >> PAGE_SHIFT; 676 KASSERT(npages <= M_EXT_MAXPAGES); /* XXX */ 677 678 /* allocate kva for mbuf data */ 679 lva = sokvaalloc(npages << PAGE_SHIFT, slp->ns_so); 680 if (lva == 0) { 681 /* fall back to VOP_READ */ 682 goto loan_fail; 683 } 684 685 /* allocate mbuf */ 686 m = m_get(M_WAIT, MT_DATA); 687 MCLAIM(m, &nfs_mowner); 688 pgpp = m->m_ext.ext_pgs; 689 690 /* loan pages */ 691 error = uvm_loanuobjpages(&vp->v_uobj, pgoff, npages, 692 pgpp); 693 if (error) { 694 sokvafree(lva, npages << PAGE_SHIFT); 695 m_free(m); 696 if (error == EBUSY) 697 goto loan_fail; 698 goto read_error; 699 } 700 701 /* associate kva to mbuf */ 702 MEXTADD(m, (void *)(lva + ((vaddr_t)off & PAGE_MASK)), 703 cnt, M_MBUF, soloanfree, slp->ns_so); 704 m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP; 705 m->m_len = cnt; 706 707 /* map pages */ 708 for (i = 0; i < npages; i++) { 709 pmap_kenter_pa(lva, VM_PAGE_TO_PHYS(pgpp[i]), 710 VM_PROT_READ); 711 lva += PAGE_SIZE; 712 } 713 714 pmap_update(pmap_kernel()); 715 716 mb->m_next = m; 717 mb = m; 718 error = 0; 719 uiop->uio_resid = 0; 720 } else { 721 struct iovec *iv; 722 struct iovec *iv2; 723 struct mbuf *m2; 724 int siz; 725 loan_fail: 726 /* 727 * Generate the mbuf list with the uio_iov ref. to it. 728 */ 729 i = 0; 730 m = m2 = mb; 731 while (left > 0) { 732 siz = min(M_TRAILINGSPACE(m), left); 733 if (siz > 0) { 734 left -= siz; 735 i++; 736 } 737 if (left > 0) { 738 m = m_get(M_WAIT, MT_DATA); 739 MCLAIM(m, &nfs_mowner); 740 m_clget(m, M_WAIT); 741 m->m_len = 0; 742 m2->m_next = m; 743 m2 = m; 744 } 745 } 746 iv = malloc(i * sizeof(struct iovec), M_TEMP, M_WAITOK); 747 uiop->uio_iov = iv2 = iv; 748 m = mb; 749 left = cnt; 750 i = 0; 751 while (left > 0) { 752 if (m == NULL) 753 panic("nfsrv_read iov"); 754 siz = min(M_TRAILINGSPACE(m), left); 755 if (siz > 0) { 756 iv->iov_base = mtod(m, char *) + 757 m->m_len; 758 iv->iov_len = siz; 759 m->m_len += siz; 760 left -= siz; 761 iv++; 762 i++; 763 } 764 m = m->m_next; 765 } 766 uiop->uio_iovcnt = i; 767 uiop->uio_offset = off; 768 uiop->uio_resid = cnt; 769 uiop->uio_rw = UIO_READ; 770 UIO_SETUP_SYSSPACE(uiop); 771 error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); 772 free((void *)iv2, M_TEMP); 773 } 774 read_error: 775 if (error || (getret = VOP_GETATTR(vp, &va, cred)) != 0){ 776 if (!error) 777 error = getret; 778 m_freem(mreq); 779 vput(vp); 780 nfsm_reply(NFSX_POSTOPATTR(v3)); 781 nfsm_srvpostop_attr(getret, &va); 782 return (0); 783 } 784 } else { 785 uiop->uio_resid = 0; 786 } 787 vput(vp); 788 nfsm_srvfillattr(&va, fp); 789 len -= uiop->uio_resid; 790 padlen = nfsm_padlen(len); 791 if (uiop->uio_resid || padlen) 792 nfs_zeropad(mb, uiop->uio_resid, padlen); 793 if (v3) { 794 /* count */ 795 *tl++ = txdr_unsigned(len); 796 /* eof */ 797 if (off + len >= va.va_size) 798 *tl++ = nfs_true; 799 else 800 *tl++ = nfs_false; 801 } 802 *tl = txdr_unsigned(len); 803 nfsm_srvdone; 804 } 805 806 /* 807 * nfs write service 808 */ 809 int 810 nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 811 { 812 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 813 struct mbuf *nam = nfsd->nd_nam; 814 char *dpos = nfsd->nd_dpos; 815 kauth_cred_t cred = nfsd->nd_cr; 816 struct iovec *ivp; 817 int i, cnt; 818 struct mbuf *mp; 819 struct nfs_fattr *fp; 820 struct iovec *iv; 821 struct vattr va, forat; 822 u_int32_t *tl; 823 int32_t t1; 824 char *bpos; 825 int error = 0, rdonly, cache = 0, len, forat_ret = 1; 826 int ioflags, aftat_ret = 1, retlen, zeroing, adjust; 827 int stable = NFSV3WRITE_FILESYNC; 828 int v3 = (nfsd->nd_flag & ND_NFSV3); 829 char *cp2; 830 struct mbuf *mb, *mreq; 831 struct vnode *vp; 832 nfsrvfh_t nsfh; 833 struct uio io, *uiop = &io; 834 off_t off; 835 u_quad_t frev; 836 837 if (mrep == NULL) { 838 *mrq = NULL; 839 return (0); 840 } 841 nfsm_srvmtofh(&nsfh); 842 if (v3) { 843 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 844 off = fxdr_hyper(tl); 845 tl += 3; 846 stable = fxdr_unsigned(int, *tl++); 847 } else { 848 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 849 off = (off_t)fxdr_unsigned(u_int32_t, *++tl); 850 tl += 2; 851 } 852 retlen = len = fxdr_unsigned(int32_t, *tl); 853 cnt = i = 0; 854 855 /* 856 * For NFS Version 2, it is not obvious what a write of zero length 857 * should do, but I might as well be consistent with Version 3, 858 * which is to return ok so long as there are no permission problems. 859 */ 860 if (len > 0) { 861 zeroing = 1; 862 mp = mrep; 863 while (mp) { 864 if (mp == md) { 865 zeroing = 0; 866 adjust = dpos - mtod(mp, char *); 867 mp->m_len -= adjust; 868 if (mp->m_len > 0 && adjust > 0) 869 NFSMADV(mp, adjust); 870 } 871 if (zeroing) 872 mp->m_len = 0; 873 else if (mp->m_len > 0) { 874 i += mp->m_len; 875 if (i > len) { 876 mp->m_len -= (i - len); 877 zeroing = 1; 878 } 879 if (mp->m_len > 0) 880 cnt++; 881 } 882 mp = mp->m_next; 883 } 884 } 885 if (len > NFS_MAXDATA || len < 0 || i < len) { 886 error = EIO; 887 nfsm_reply(2 * NFSX_UNSIGNED); 888 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 889 return (0); 890 } 891 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 892 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 893 if (error) { 894 nfsm_reply(2 * NFSX_UNSIGNED); 895 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 896 return (0); 897 } 898 if (v3) 899 forat_ret = VOP_GETATTR(vp, &forat, cred); 900 if (vp->v_type != VREG) { 901 if (v3) 902 error = EINVAL; 903 else 904 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 905 } 906 if (!error) { 907 nqsrv_getl(vp, ND_WRITE); 908 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 909 } 910 if (error) { 911 vput(vp); 912 nfsm_reply(NFSX_WCCDATA(v3)); 913 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 914 return (0); 915 } 916 917 if (len > 0) { 918 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, M_WAITOK); 919 uiop->uio_iov = iv = ivp; 920 uiop->uio_iovcnt = cnt; 921 mp = mrep; 922 while (mp) { 923 if (mp->m_len > 0) { 924 ivp->iov_base = mtod(mp, void *); 925 ivp->iov_len = mp->m_len; 926 ivp++; 927 } 928 mp = mp->m_next; 929 } 930 931 /* 932 * XXX 933 * The IO_METASYNC flag indicates that all metadata (and not 934 * just enough to ensure data integrity) must be written to 935 * stable storage synchronously. 936 * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) 937 */ 938 if (stable == NFSV3WRITE_UNSTABLE) 939 ioflags = IO_NODELOCKED; 940 else if (stable == NFSV3WRITE_DATASYNC) 941 ioflags = (IO_SYNC | IO_NODELOCKED); 942 else 943 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 944 uiop->uio_resid = len; 945 uiop->uio_rw = UIO_WRITE; 946 uiop->uio_offset = off; 947 UIO_SETUP_SYSSPACE(uiop); 948 error = VOP_WRITE(vp, uiop, ioflags, cred); 949 nfsstats.srvvop_writes++; 950 free(iv, M_TEMP); 951 } 952 aftat_ret = VOP_GETATTR(vp, &va, cred); 953 vput(vp); 954 if (!error) 955 error = aftat_ret; 956 nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + 957 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); 958 if (v3) { 959 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 960 if (error) 961 return (0); 962 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 963 *tl++ = txdr_unsigned(retlen); 964 if (stable == NFSV3WRITE_UNSTABLE) 965 *tl++ = txdr_unsigned(stable); 966 else 967 *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); 968 /* 969 * Actually, there is no need to txdr these fields, 970 * but it may make the values more human readable, 971 * for debugging purposes. 972 */ 973 *tl++ = txdr_unsigned(boottime.tv_sec); 974 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 975 } else { 976 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 977 nfsm_srvfillattr(&va, fp); 978 } 979 nfsm_srvdone; 980 } 981 982 /* 983 * XXX elad: the original NFSW_SAMECRED() macro also made sure the 984 * two nd_flag fields of the descriptors contained 985 * ND_KERBAUTH. 986 */ 987 static int 988 nfsrv_samecred(kauth_cred_t cred1, kauth_cred_t cred2) 989 { 990 int i, do_ngroups; 991 992 if (kauth_cred_geteuid(cred1) != kauth_cred_geteuid(cred2)) 993 return (0); 994 if (kauth_cred_ngroups(cred1) != kauth_cred_ngroups(cred2)) 995 return (0); 996 do_ngroups = kauth_cred_ngroups(cred1); 997 for (i = 0; i < do_ngroups; i++) 998 if (kauth_cred_group(cred1, i) != 999 kauth_cred_group(cred2, i)) 1000 return (0); 1001 1002 return (1); 1003 } 1004 1005 static struct nfsrvw_delayhash * 1006 nfsrv_nwdelayhash(struct nfssvc_sock *slp, const nfsrvfh_t *nsfh) 1007 { 1008 uint32_t hash; 1009 1010 hash = hash32_buf(NFSRVFH_DATA(nsfh), NFSRVFH_SIZE(nsfh), 1011 HASH32_BUF_INIT); 1012 return &slp->ns_wdelayhashtbl[hash % NFS_WDELAYHASHSIZ]; 1013 } 1014 1015 /* 1016 * NFS write service with write gathering support. Called when 1017 * nfsrvw_procrastinate > 0. 1018 * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", 1019 * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, 1020 * Jan. 1994. 1021 */ 1022 int 1023 nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1024 { 1025 struct timeval now; 1026 struct iovec *ivp; 1027 struct mbuf *mp; 1028 struct nfsrv_descript *wp, *nfsd, *owp, *swp; 1029 struct nfs_fattr *fp; 1030 int i = 0; 1031 struct iovec *iov; 1032 struct nfsrvw_delayhash *wpp; 1033 kauth_cred_t cred; 1034 struct vattr va, forat; 1035 u_int32_t *tl; 1036 int32_t t1; 1037 char *bpos, *dpos; 1038 int error = 0, rdonly, cache = 0, len = 0, forat_ret = 1; 1039 int ioflags, aftat_ret = 1, adjust, v3, zeroing; 1040 char *cp2; 1041 struct mbuf *mb, *mreq, *mrep, *md; 1042 struct vnode *vp; 1043 struct uio io, *uiop = &io; 1044 u_quad_t frev, cur_usec; 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 owp = NULL; 1122 mutex_enter(&nfsd_lock); 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 mutex_exit(&nfsd_lock); 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 mutex_enter(&nfsd_lock); 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 mutex_exit(&nfsd_lock); 1182 1183 mrep = nfsd->nd_mrep; 1184 nfsd->nd_mrep = NULL; 1185 cred = nfsd->nd_cr; 1186 v3 = (nfsd->nd_flag & ND_NFSV3); 1187 forat_ret = aftat_ret = 1; 1188 error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &vp, cred, slp, 1189 nfsd->nd_nam, &rdonly, (nfsd->nd_flag & ND_KERBAUTH), 1190 false); 1191 if (!error) { 1192 if (v3) 1193 forat_ret = VOP_GETATTR(vp, &forat, cred); 1194 if (vp->v_type != VREG) { 1195 if (v3) 1196 error = EINVAL; 1197 else 1198 error = (vp->v_type == VDIR) ? EISDIR : EACCES; 1199 } 1200 } else 1201 vp = NULL; 1202 if (!error) { 1203 nqsrv_getl(vp, ND_WRITE); 1204 error = nfsrv_access(vp, VWRITE, cred, rdonly, lwp, 1); 1205 } 1206 1207 if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) 1208 ioflags = IO_NODELOCKED; 1209 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) 1210 ioflags = (IO_SYNC | IO_NODELOCKED); 1211 else 1212 ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); 1213 uiop->uio_rw = UIO_WRITE; 1214 uiop->uio_offset = nfsd->nd_off; 1215 uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; 1216 UIO_SETUP_SYSSPACE(uiop); 1217 if (uiop->uio_resid > 0) { 1218 mp = mrep; 1219 i = 0; 1220 while (mp) { 1221 if (mp->m_len > 0) 1222 i++; 1223 mp = mp->m_next; 1224 } 1225 uiop->uio_iovcnt = i; 1226 iov = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 1227 uiop->uio_iov = ivp = iov; 1228 mp = mrep; 1229 while (mp) { 1230 if (mp->m_len > 0) { 1231 ivp->iov_base = mtod(mp, void *); 1232 ivp->iov_len = mp->m_len; 1233 ivp++; 1234 } 1235 mp = mp->m_next; 1236 } 1237 if (!error) { 1238 error = VOP_WRITE(vp, uiop, ioflags, cred); 1239 nfsstats.srvvop_writes++; 1240 } 1241 free((void *)iov, M_TEMP); 1242 } 1243 m_freem(mrep); 1244 if (vp) { 1245 aftat_ret = VOP_GETATTR(vp, &va, cred); 1246 vput(vp); 1247 } 1248 1249 /* 1250 * Loop around generating replies for all write rpcs that have 1251 * now been completed. 1252 */ 1253 swp = nfsd; 1254 do { 1255 if (error) { 1256 nfsm_writereply(NFSX_WCCDATA(v3), v3); 1257 if (v3) { 1258 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1259 } 1260 } else { 1261 nfsm_writereply(NFSX_PREOPATTR(v3) + 1262 NFSX_POSTOPORFATTR(v3) + 2 * NFSX_UNSIGNED + 1263 NFSX_WRITEVERF(v3), v3); 1264 if (v3) { 1265 nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, &va); 1266 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1267 *tl++ = txdr_unsigned(nfsd->nd_len); 1268 *tl++ = txdr_unsigned(swp->nd_stable); 1269 /* 1270 * Actually, there is no need to txdr these fields, 1271 * but it may make the values more human readable, 1272 * for debugging purposes. 1273 */ 1274 *tl++ = txdr_unsigned(boottime.tv_sec); 1275 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 1276 } else { 1277 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1278 nfsm_srvfillattr(&va, fp); 1279 } 1280 } 1281 nfsd->nd_mreq = mreq; 1282 if (nfsd->nd_mrep) 1283 panic("nfsrv_write: nd_mrep not free"); 1284 1285 /* 1286 * Done. Put it at the head of the timer queue so that 1287 * the final phase can return the reply. 1288 */ 1289 mutex_enter(&nfsd_lock); 1290 if (nfsd != swp) { 1291 nfsd->nd_time = 0; 1292 LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); 1293 } 1294 nfsd = LIST_FIRST(&swp->nd_coalesce); 1295 if (nfsd) { 1296 LIST_REMOVE(nfsd, nd_tq); 1297 } 1298 mutex_exit(&nfsd_lock); 1299 } while (nfsd); 1300 swp->nd_time = 0; 1301 1302 mutex_enter(&nfsd_lock); 1303 LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); 1304 mutex_exit(&nfsd_lock); 1305 goto loop1; 1306 } 1307 mutex_exit(&nfsd_lock); 1308 nfs_timer_start(); 1309 1310 /* 1311 * Search for a reply to return. 1312 */ 1313 mutex_enter(&nfsd_lock); 1314 LIST_FOREACH(nfsd, &slp->ns_tq, nd_tq) { 1315 if (nfsd->nd_mreq) { 1316 LIST_REMOVE(nfsd, nd_tq); 1317 *mrq = nfsd->nd_mreq; 1318 *ndp = nfsd; 1319 break; 1320 } 1321 } 1322 mutex_exit(&nfsd_lock); 1323 return (0); 1324 } 1325 1326 /* 1327 * Coalesce the write request nfsd into owp. To do this we must: 1328 * - remove nfsd from the queues 1329 * - merge nfsd->nd_mrep into owp->nd_mrep 1330 * - update the nd_eoff and nd_stable for owp 1331 * - put nfsd on owp's nd_coalesce list 1332 * NB: Must be called at splsoftclock(). 1333 */ 1334 void 1335 nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) 1336 { 1337 int overlap; 1338 struct mbuf *mp; 1339 struct nfsrv_descript *m; 1340 1341 KASSERT(mutex_owned(&nfsd_lock)); 1342 1343 LIST_REMOVE(nfsd, nd_hash); 1344 LIST_REMOVE(nfsd, nd_tq); 1345 if (owp->nd_eoff < nfsd->nd_eoff) { 1346 overlap = owp->nd_eoff - nfsd->nd_off; 1347 if (overlap < 0) 1348 panic("nfsrv_coalesce: bad off"); 1349 if (overlap > 0) 1350 m_adj(nfsd->nd_mrep, overlap); 1351 mp = owp->nd_mrep; 1352 while (mp->m_next) 1353 mp = mp->m_next; 1354 mp->m_next = nfsd->nd_mrep; 1355 owp->nd_eoff = nfsd->nd_eoff; 1356 } else 1357 m_freem(nfsd->nd_mrep); 1358 nfsd->nd_mrep = NULL; 1359 if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) 1360 owp->nd_stable = NFSV3WRITE_FILESYNC; 1361 else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && 1362 owp->nd_stable == NFSV3WRITE_UNSTABLE) 1363 owp->nd_stable = NFSV3WRITE_DATASYNC; 1364 LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); 1365 /* 1366 * nfsd might hold coalesce elements! Move them to owp. 1367 * Otherwise, requests may be lost and clients will be stuck. 1368 */ 1369 while ((m = LIST_FIRST(&nfsd->nd_coalesce)) != NULL) { 1370 LIST_REMOVE(m, nd_tq); 1371 LIST_INSERT_HEAD(&owp->nd_coalesce, m, nd_tq); 1372 } 1373 } 1374 1375 /* 1376 * nfs create service 1377 * now does a truncate to 0 length via. setattr if it already exists 1378 */ 1379 int 1380 nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1381 { 1382 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1383 struct mbuf *nam = nfsd->nd_nam; 1384 char *dpos = nfsd->nd_dpos; 1385 kauth_cred_t cred = nfsd->nd_cr; 1386 struct nfs_fattr *fp; 1387 struct vattr va, dirfor, diraft; 1388 struct nfsv2_sattr *sp; 1389 u_int32_t *tl; 1390 struct nameidata nd; 1391 char *cp; 1392 int32_t t1; 1393 char *bpos; 1394 int error = 0, cache = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; 1395 int rdev = 0, abort = 0; 1396 int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; 1397 char *cp2; 1398 struct mbuf *mb, *mreq; 1399 struct vnode *vp = NULL, *dirp = NULL; 1400 nfsrvfh_t nsfh; 1401 u_quad_t frev, tempsize; 1402 u_char cverf[NFSX_V3CREATEVERF]; 1403 1404 nd.ni_cnd.cn_nameiop = 0; 1405 nfsm_srvmtofh(&nsfh); 1406 nfsm_srvnamesiz(len); 1407 nd.ni_cnd.cn_cred = cred; 1408 nd.ni_cnd.cn_nameiop = CREATE; 1409 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1410 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1411 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1412 if (dirp && v3) { 1413 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1414 } 1415 if (error) { 1416 nfsm_reply(NFSX_WCCDATA(v3)); 1417 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1418 if (dirp) 1419 vrele(dirp); 1420 return (0); 1421 } 1422 abort = 1; 1423 VATTR_NULL(&va); 1424 if (v3) { 1425 va.va_mode = 0; 1426 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1427 how = fxdr_unsigned(int, *tl); 1428 switch (how) { 1429 case NFSV3CREATE_GUARDED: 1430 if (nd.ni_vp) { 1431 error = EEXIST; 1432 break; 1433 } 1434 case NFSV3CREATE_UNCHECKED: 1435 nfsm_srvsattr(&va); 1436 break; 1437 case NFSV3CREATE_EXCLUSIVE: 1438 nfsm_dissect(cp, void *, NFSX_V3CREATEVERF); 1439 memcpy(cverf, cp, NFSX_V3CREATEVERF); 1440 exclusive_flag = 1; 1441 break; 1442 }; 1443 va.va_type = VREG; 1444 } else { 1445 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1446 va.va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); 1447 if (va.va_type == VNON) 1448 va.va_type = VREG; 1449 va.va_mode = nfstov_mode(sp->sa_mode); 1450 switch (va.va_type) { 1451 case VREG: 1452 tsize = fxdr_unsigned(int32_t, sp->sa_size); 1453 if (tsize != -1) 1454 va.va_size = (u_quad_t)tsize; 1455 break; 1456 case VCHR: 1457 case VBLK: 1458 case VFIFO: 1459 rdev = fxdr_unsigned(int32_t, sp->sa_size); 1460 break; 1461 default: 1462 break; 1463 }; 1464 } 1465 1466 /* 1467 * Iff doesn't exist, create it 1468 * otherwise just truncate to 0 length 1469 * should I set the mode too ?? 1470 */ 1471 if (nd.ni_vp == NULL) { 1472 if (va.va_type == VREG || va.va_type == VSOCK) { 1473 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1474 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1475 if (!error) { 1476 if (exclusive_flag) { 1477 exclusive_flag = 0; 1478 VATTR_NULL(&va); 1479 /* 1480 * XXX 1481 * assuming NFSX_V3CREATEVERF 1482 * == sizeof(nfstime3) 1483 */ 1484 fxdr_nfsv3time(cverf, &va.va_atime); 1485 error = VOP_SETATTR(nd.ni_vp, &va, 1486 cred); 1487 } 1488 } 1489 } else if (va.va_type == VCHR || va.va_type == VBLK || 1490 va.va_type == VFIFO) { 1491 if (va.va_type == VCHR && rdev == 0xffffffff) 1492 va.va_type = VFIFO; 1493 if (va.va_type != VFIFO && 1494 (error = kauth_authorize_system(cred, 1495 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1496 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1497 vput(nd.ni_dvp); 1498 abort = 0; 1499 nfsm_reply(0); 1500 return (error); 1501 } else 1502 va.va_rdev = (dev_t)rdev; 1503 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1504 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, 1505 &va); 1506 if (error) { 1507 nfsm_reply(0); 1508 } 1509 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1510 vput(nd.ni_vp); 1511 vrele(nd.ni_dvp); 1512 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1513 error = EINVAL; 1514 abort = 0; 1515 nfsm_reply(0); 1516 } 1517 } else { 1518 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1519 vput(nd.ni_dvp); 1520 error = ENXIO; 1521 abort = 0; 1522 } 1523 vp = nd.ni_vp; 1524 } else { 1525 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1526 vp = nd.ni_vp; 1527 if (nd.ni_dvp == vp) 1528 vrele(nd.ni_dvp); 1529 else 1530 vput(nd.ni_dvp); 1531 abort = 0; 1532 if (!error && va.va_size != -1) { 1533 error = nfsrv_access(vp, VWRITE, cred, 1534 (nd.ni_cnd.cn_flags & RDONLY), lwp, 0); 1535 if (!error) { 1536 nqsrv_getl(vp, ND_WRITE); 1537 tempsize = va.va_size; 1538 VATTR_NULL(&va); 1539 va.va_size = tempsize; 1540 error = VOP_SETATTR(vp, &va, cred); 1541 } 1542 } 1543 if (error) 1544 vput(vp); 1545 } 1546 if (!error) { 1547 error = nfsrv_composefh(vp, &nsfh, v3); 1548 if (!error) 1549 error = VOP_GETATTR(vp, &va, cred); 1550 vput(vp); 1551 } 1552 if (v3) { 1553 if (exclusive_flag && !error) { 1554 /* 1555 * XXX assuming NFSX_V3CREATEVERF == sizeof(nfstime3) 1556 */ 1557 char oldverf[NFSX_V3CREATEVERF]; 1558 1559 txdr_nfsv3time(&va.va_atime, oldverf); 1560 if (memcmp(cverf, oldverf, NFSX_V3CREATEVERF)) 1561 error = EEXIST; 1562 } 1563 if (dirp) { 1564 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1565 } 1566 } 1567 if (dirp) { 1568 vrele(dirp); 1569 dirp = NULL; 1570 } 1571 abort = 0; 1572 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); 1573 if (v3) { 1574 if (!error) { 1575 nfsm_srvpostop_fh(&nsfh); 1576 nfsm_srvpostop_attr(0, &va); 1577 } 1578 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1579 } else { 1580 nfsm_srvfhtom(&nsfh, v3); 1581 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 1582 nfsm_srvfillattr(&va, fp); 1583 } 1584 return (0); 1585 nfsmout: 1586 if (dirp) 1587 vrele(dirp); 1588 if (abort) { 1589 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1590 if (nd.ni_dvp == nd.ni_vp) 1591 vrele(nd.ni_dvp); 1592 else 1593 vput(nd.ni_dvp); 1594 if (nd.ni_vp) 1595 vput(nd.ni_vp); 1596 } 1597 return (error); 1598 } 1599 1600 /* 1601 * nfs v3 mknod service 1602 */ 1603 int 1604 nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1605 { 1606 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1607 struct mbuf *nam = nfsd->nd_nam; 1608 char *dpos = nfsd->nd_dpos; 1609 kauth_cred_t cred = nfsd->nd_cr; 1610 struct vattr va, dirfor, diraft; 1611 u_int32_t *tl; 1612 struct nameidata nd; 1613 int32_t t1; 1614 char *bpos; 1615 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1616 int abort = 0; 1617 u_int32_t major, minor; 1618 enum vtype vtyp; 1619 char *cp2; 1620 struct mbuf *mb, *mreq; 1621 struct vnode *vp, *dirp = (struct vnode *)0; 1622 nfsrvfh_t nsfh; 1623 u_quad_t frev; 1624 1625 nd.ni_cnd.cn_nameiop = 0; 1626 nfsm_srvmtofh(&nsfh); 1627 nfsm_srvnamesiz(len); 1628 nd.ni_cnd.cn_cred = cred; 1629 nd.ni_cnd.cn_nameiop = CREATE; 1630 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1631 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1632 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1633 if (dirp) 1634 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1635 if (error) { 1636 nfsm_reply(NFSX_WCCDATA(1)); 1637 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1638 if (dirp) 1639 vrele(dirp); 1640 return (0); 1641 } 1642 abort = 1; 1643 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1644 vtyp = nfsv3tov_type(*tl); 1645 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1646 error = NFSERR_BADTYPE; 1647 goto abort; 1648 } 1649 VATTR_NULL(&va); 1650 va.va_mode = 0; 1651 nfsm_srvsattr(&va); 1652 if (vtyp == VCHR || vtyp == VBLK) { 1653 dev_t rdev; 1654 1655 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1656 major = fxdr_unsigned(u_int32_t, *tl++); 1657 minor = fxdr_unsigned(u_int32_t, *tl); 1658 rdev = makedev(major, minor); 1659 if (major(rdev) != major || minor(rdev) != minor) { 1660 error = EINVAL; 1661 goto abort; 1662 } 1663 va.va_rdev = rdev; 1664 } 1665 1666 /* 1667 * Iff doesn't exist, create it. 1668 */ 1669 if (nd.ni_vp) { 1670 error = EEXIST; 1671 abort: 1672 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1673 if (nd.ni_dvp == nd.ni_vp) 1674 vrele(nd.ni_dvp); 1675 else 1676 vput(nd.ni_dvp); 1677 if (nd.ni_vp) 1678 vput(nd.ni_vp); 1679 goto out; 1680 } 1681 va.va_type = vtyp; 1682 if (vtyp == VSOCK) { 1683 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1684 error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1685 } else { 1686 if (va.va_type != VFIFO && 1687 (error = kauth_authorize_system(cred, 1688 KAUTH_SYSTEM_MKNOD, 0, NULL, NULL, NULL))) { 1689 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1690 vput(nd.ni_dvp); 1691 goto out; 1692 } 1693 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1694 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 1695 if (error) 1696 goto out; 1697 if (nd.ni_cnd.cn_flags & ISSYMLINK) { 1698 vput(nd.ni_vp); 1699 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1700 error = EINVAL; 1701 } 1702 } 1703 out: 1704 vp = nd.ni_vp; 1705 if (!error) { 1706 error = nfsrv_composefh(vp, &nsfh, true); 1707 if (!error) 1708 error = VOP_GETATTR(vp, &va, cred); 1709 vput(vp); 1710 } 1711 if (dirp) { 1712 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1713 vrele(dirp); 1714 dirp = NULL; 1715 } 1716 abort = 0; 1717 nfsm_reply(NFSX_SRVFH(&nsfh, true) + NFSX_POSTOPATTR(1) + 1718 NFSX_WCCDATA(1)); 1719 if (!error) { 1720 nfsm_srvpostop_fh(&nsfh); 1721 nfsm_srvpostop_attr(0, &va); 1722 } 1723 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1724 return (0); 1725 nfsmout: 1726 if (abort) { 1727 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1728 if (nd.ni_dvp == nd.ni_vp) 1729 vrele(nd.ni_dvp); 1730 else 1731 vput(nd.ni_dvp); 1732 if (nd.ni_vp) 1733 vput(nd.ni_vp); 1734 } 1735 if (dirp) 1736 vrele(dirp); 1737 return (error); 1738 } 1739 1740 /* 1741 * nfs remove service 1742 */ 1743 int 1744 nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1745 { 1746 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1747 struct mbuf *nam = nfsd->nd_nam; 1748 char *dpos = nfsd->nd_dpos; 1749 kauth_cred_t cred = nfsd->nd_cr; 1750 struct nameidata nd; 1751 u_int32_t *tl; 1752 int32_t t1; 1753 char *bpos; 1754 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 1755 int v3 = (nfsd->nd_flag & ND_NFSV3); 1756 char *cp2; 1757 struct mbuf *mb, *mreq; 1758 struct vnode *vp, *dirp; 1759 struct vattr dirfor, diraft; 1760 nfsrvfh_t nsfh; 1761 u_quad_t frev; 1762 1763 #ifndef nolint 1764 vp = (struct vnode *)0; 1765 #endif 1766 nfsm_srvmtofh(&nsfh); 1767 nfsm_srvnamesiz(len); 1768 nd.ni_cnd.cn_cred = cred; 1769 nd.ni_cnd.cn_nameiop = DELETE; 1770 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 1771 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 1772 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1773 if (dirp && v3) { 1774 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 1775 } 1776 if (!error) { 1777 vp = nd.ni_vp; 1778 if (vp->v_type == VDIR) { 1779 error = EPERM; 1780 goto out; 1781 } 1782 /* 1783 * The root of a mounted filesystem cannot be deleted. 1784 */ 1785 if (vp->v_vflag & VV_ROOT) { 1786 error = EBUSY; 1787 } 1788 out: 1789 if (!error) { 1790 nqsrv_getl(nd.ni_dvp, ND_WRITE); 1791 nqsrv_getl(vp, ND_WRITE); 1792 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1793 } else { 1794 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1795 if (nd.ni_dvp == vp) 1796 vrele(nd.ni_dvp); 1797 else 1798 vput(nd.ni_dvp); 1799 vput(vp); 1800 } 1801 } 1802 if (dirp) { 1803 if (v3) { 1804 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 1805 } 1806 vrele(dirp); 1807 } 1808 nfsm_reply(NFSX_WCCDATA(v3)); 1809 if (v3) { 1810 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 1811 return (0); 1812 } 1813 nfsm_srvdone; 1814 } 1815 1816 /* 1817 * nfs rename service 1818 */ 1819 int 1820 nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 1821 { 1822 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 1823 struct mbuf *nam = nfsd->nd_nam; 1824 char *dpos = nfsd->nd_dpos; 1825 kauth_cred_t cred = nfsd->nd_cr; 1826 u_int32_t *tl; 1827 int32_t t1; 1828 char *bpos; 1829 int error = 0, cache = 0, fdirfor_ret = 1, fdiraft_ret = 1; 1830 uint32_t len, len2; 1831 int tdirfor_ret = 1, tdiraft_ret = 1; 1832 int v3 = (nfsd->nd_flag & ND_NFSV3); 1833 char *cp2; 1834 struct mbuf *mb, *mreq; 1835 struct nameidata fromnd, tond; 1836 struct vnode *fvp, *tvp, *tdvp; 1837 struct vnode *fdirp = NULL, *tdirp = NULL; 1838 struct mount *localfs = NULL; 1839 struct vattr fdirfor, fdiraft, tdirfor, tdiraft; 1840 nfsrvfh_t fnsfh, tnsfh; 1841 u_quad_t frev; 1842 uid_t saved_uid; 1843 uint32_t saveflag; 1844 1845 #ifndef nolint 1846 fvp = (struct vnode *)0; 1847 #endif 1848 fromnd.ni_cnd.cn_nameiop = 0; 1849 tond.ni_cnd.cn_nameiop = 0; 1850 nfsm_srvmtofh(&fnsfh); 1851 nfsm_srvnamesiz(len); 1852 /* 1853 * Remember our original uid so that we can reset cr_uid before 1854 * the second nfs_namei() call, in case it is remapped. 1855 */ 1856 saved_uid = kauth_cred_geteuid(cred); 1857 fromnd.ni_cnd.cn_cred = cred; 1858 fromnd.ni_cnd.cn_nameiop = DELETE; 1859 fromnd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART; 1860 error = nfs_namei(&fromnd, &fnsfh, len, slp, nam, &md, 1861 &dpos, &fdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1862 if (fdirp && v3) { 1863 fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor, cred); 1864 } 1865 if (error) { 1866 nfsm_reply(2 * NFSX_WCCDATA(v3)); 1867 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 1868 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 1869 if (fdirp) 1870 vrele(fdirp); 1871 return (0); 1872 } 1873 if (fromnd.ni_dvp != fromnd.ni_vp) { 1874 VOP_UNLOCK(fromnd.ni_dvp, 0); 1875 } 1876 fvp = fromnd.ni_vp; 1877 1878 localfs = fvp->v_mount; 1879 error = VFS_RENAMELOCK_ENTER(localfs); 1880 if (error) { 1881 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1882 vrele(fromnd.ni_dvp); 1883 vrele(fvp); 1884 goto out1; 1885 } 1886 1887 /* Copied, regrettably, from vfs_syscalls.c (q.v.) */ 1888 vrele(fvp); 1889 if ((fromnd.ni_cnd.cn_namelen == 1 && 1890 fromnd.ni_cnd.cn_nameptr[0] == '.') || 1891 (fromnd.ni_cnd.cn_namelen == 2 && 1892 fromnd.ni_cnd.cn_nameptr[0] == '.' && 1893 fromnd.ni_cnd.cn_nameptr[1] == '.')) { 1894 error = EINVAL; 1895 VFS_RENAMELOCK_EXIT(localfs); 1896 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1897 vrele(fromnd.ni_dvp); 1898 goto out1; 1899 } 1900 saveflag = fromnd.ni_cnd.cn_flags & SAVESTART; 1901 fromnd.ni_cnd.cn_flags &= ~SAVESTART; 1902 vn_lock(fromnd.ni_dvp, LK_EXCLUSIVE | LK_RETRY); 1903 error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd); 1904 fromnd.ni_cnd.cn_flags |= saveflag; 1905 if (error) { 1906 VOP_UNLOCK(fromnd.ni_dvp, 0); 1907 VFS_RENAMELOCK_EXIT(localfs); 1908 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1909 vrele(fromnd.ni_dvp); 1910 goto out1; 1911 } 1912 VOP_UNLOCK(fromnd.ni_vp, 0); 1913 if (fromnd.ni_dvp != fromnd.ni_vp) 1914 VOP_UNLOCK(fromnd.ni_dvp, 0); 1915 fvp = fromnd.ni_vp; 1916 1917 nfsm_srvmtofh(&tnsfh); 1918 if (v3) { 1919 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1920 len2 = fxdr_unsigned(uint32_t, *tl); 1921 /* len2 will be checked by nfs_namei */ 1922 } 1923 else { 1924 /* NFSv2 */ 1925 nfsm_strsiz(len2, NFS_MAXNAMLEN); 1926 } 1927 kauth_cred_seteuid(cred, saved_uid); 1928 tond.ni_cnd.cn_cred = cred; 1929 tond.ni_cnd.cn_nameiop = RENAME; 1930 tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; 1931 error = nfs_namei(&tond, &tnsfh, len2, slp, nam, &md, 1932 &dpos, &tdirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 1933 if (tdirp && v3) { 1934 tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor, cred); 1935 } 1936 if (error) { 1937 VFS_RENAMELOCK_EXIT(localfs); 1938 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 1939 vrele(fromnd.ni_dvp); 1940 vrele(fvp); 1941 goto out1; 1942 } 1943 tdvp = tond.ni_dvp; 1944 tvp = tond.ni_vp; 1945 if (tvp != NULL) { 1946 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1947 if (v3) 1948 error = EEXIST; 1949 else 1950 error = EISDIR; 1951 goto out; 1952 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1953 if (v3) 1954 error = EEXIST; 1955 else 1956 error = ENOTDIR; 1957 goto out; 1958 } 1959 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1960 if (v3) 1961 error = EXDEV; 1962 else 1963 error = ENOTEMPTY; 1964 goto out; 1965 } 1966 } 1967 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1968 if (v3) 1969 error = EXDEV; 1970 else 1971 error = ENOTEMPTY; 1972 goto out; 1973 } 1974 if (fvp->v_mount != tdvp->v_mount) { 1975 if (v3) 1976 error = EXDEV; 1977 else 1978 error = ENOTEMPTY; 1979 goto out; 1980 } 1981 if (fvp == tdvp) { 1982 if (v3) 1983 error = EINVAL; 1984 else 1985 error = ENOTEMPTY; 1986 } 1987 /* 1988 * If source is the same as the destination (that is the 1989 * same vnode with the same name in the same directory), 1990 * then there is nothing to do. 1991 */ 1992 if (fvp == tvp && fromnd.ni_dvp == tdvp && 1993 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 1994 !memcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, 1995 fromnd.ni_cnd.cn_namelen)) 1996 error = -1; 1997 out: 1998 if (!error) { 1999 nqsrv_getl(fromnd.ni_dvp, ND_WRITE); 2000 nqsrv_getl(tdvp, ND_WRITE); 2001 if (tvp) { 2002 nqsrv_getl(tvp, ND_WRITE); 2003 } 2004 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 2005 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 2006 VFS_RENAMELOCK_EXIT(localfs); 2007 } else { 2008 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 2009 if (tdvp == tvp) 2010 vrele(tdvp); 2011 else 2012 vput(tdvp); 2013 if (tvp) 2014 vput(tvp); 2015 VFS_RENAMELOCK_EXIT(localfs); 2016 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2017 vrele(fromnd.ni_dvp); 2018 vrele(fvp); 2019 if (error == -1) 2020 error = 0; 2021 } 2022 vrele(tond.ni_startdir); 2023 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2024 tond.ni_cnd.cn_nameiop = 0; 2025 out1: 2026 if (fdirp) { 2027 if (v3) { 2028 fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); 2029 } 2030 vrele(fdirp); 2031 fdirp = NULL; 2032 } 2033 if (tdirp) { 2034 if (v3) { 2035 tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); 2036 } 2037 vrele(tdirp); 2038 tdirp = NULL; 2039 } 2040 vrele(fromnd.ni_startdir); 2041 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2042 fromnd.ni_cnd.cn_nameiop = 0; 2043 localfs = NULL; 2044 nfsm_reply(2 * NFSX_WCCDATA(v3)); 2045 if (v3) { 2046 nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); 2047 nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); 2048 } 2049 return (0); 2050 2051 nfsmout: 2052 if (fdirp) 2053 vrele(fdirp); 2054 #ifdef notdef 2055 if (tdirp) 2056 vrele(tdirp); 2057 #endif 2058 if (tond.ni_cnd.cn_nameiop) { 2059 vrele(tond.ni_startdir); 2060 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 2061 } 2062 if (localfs) { 2063 VFS_RENAMELOCK_EXIT(localfs); 2064 } 2065 if (fromnd.ni_cnd.cn_nameiop) { 2066 vrele(fromnd.ni_startdir); 2067 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 2068 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 2069 vrele(fromnd.ni_dvp); 2070 vrele(fvp); 2071 } 2072 return (error); 2073 } 2074 2075 /* 2076 * nfs link service 2077 */ 2078 int 2079 nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2080 { 2081 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2082 struct mbuf *nam = nfsd->nd_nam; 2083 char *dpos = nfsd->nd_dpos; 2084 kauth_cred_t cred = nfsd->nd_cr; 2085 struct nameidata nd; 2086 u_int32_t *tl; 2087 int32_t t1; 2088 char *bpos; 2089 int error = 0, rdonly, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2090 int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); 2091 char *cp2; 2092 struct mbuf *mb, *mreq; 2093 struct vnode *vp, *xp, *dirp = (struct vnode *)0; 2094 struct vattr dirfor, diraft, at; 2095 nfsrvfh_t nsfh, dnsfh; 2096 u_quad_t frev; 2097 2098 nfsm_srvmtofh(&nsfh); 2099 nfsm_srvmtofh(&dnsfh); 2100 nfsm_srvnamesiz(len); 2101 error = nfsrv_fhtovp(&nsfh, false, &vp, cred, slp, nam, 2102 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2103 if (error) { 2104 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2105 nfsm_srvpostop_attr(getret, &at); 2106 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2107 return (0); 2108 } 2109 if (vp->v_type == VDIR) { 2110 error = EPERM; 2111 goto out1; 2112 } 2113 nd.ni_cnd.cn_cred = cred; 2114 nd.ni_cnd.cn_nameiop = CREATE; 2115 nd.ni_cnd.cn_flags = LOCKPARENT; 2116 error = nfs_namei(&nd, &dnsfh, len, slp, nam, &md, &dpos, 2117 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2118 if (dirp && v3) { 2119 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2120 } 2121 if (error) 2122 goto out1; 2123 xp = nd.ni_vp; 2124 if (xp != NULL) { 2125 error = EEXIST; 2126 goto out; 2127 } 2128 xp = nd.ni_dvp; 2129 if (vp->v_mount != xp->v_mount) 2130 error = EXDEV; 2131 out: 2132 if (!error) { 2133 nqsrv_getl(vp, ND_WRITE); 2134 nqsrv_getl(xp, ND_WRITE); 2135 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 2136 } else { 2137 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2138 if (nd.ni_dvp == nd.ni_vp) 2139 vrele(nd.ni_dvp); 2140 else 2141 vput(nd.ni_dvp); 2142 if (nd.ni_vp) 2143 vrele(nd.ni_vp); 2144 } 2145 out1: 2146 if (v3) 2147 getret = VOP_GETATTR(vp, &at, cred); 2148 if (dirp) { 2149 if (v3) { 2150 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2151 } 2152 vrele(dirp); 2153 } 2154 vrele(vp); 2155 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); 2156 if (v3) { 2157 nfsm_srvpostop_attr(getret, &at); 2158 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2159 return (0); 2160 } 2161 nfsm_srvdone; 2162 } 2163 2164 /* 2165 * nfs symbolic link service 2166 */ 2167 int 2168 nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2169 { 2170 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2171 struct mbuf *nam = nfsd->nd_nam; 2172 char *dpos = nfsd->nd_dpos; 2173 kauth_cred_t cred = nfsd->nd_cr; 2174 struct vattr va, dirfor, diraft; 2175 struct nameidata nd; 2176 u_int32_t *tl; 2177 int32_t t1; 2178 struct nfsv2_sattr *sp; 2179 char *bpos, *pathcp = NULL, *cp2; 2180 struct uio io; 2181 struct iovec iv; 2182 int error = 0, cache = 0, dirfor_ret = 1, diraft_ret = 1, abort = 0; 2183 uint32_t len, len2; 2184 int v3 = (nfsd->nd_flag & ND_NFSV3); 2185 struct mbuf *mb, *mreq; 2186 struct vnode *dirp = (struct vnode *)0; 2187 nfsrvfh_t nsfh; 2188 u_quad_t frev; 2189 2190 nd.ni_cnd.cn_nameiop = 0; 2191 nfsm_srvmtofh(&nsfh); 2192 nfsm_srvnamesiz(len); 2193 nd.ni_cnd.cn_cred = cred; 2194 nd.ni_cnd.cn_nameiop = CREATE; 2195 nd.ni_cnd.cn_flags = LOCKPARENT; 2196 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2197 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2198 if (dirp && v3) { 2199 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2200 } 2201 if (error) 2202 goto out; 2203 abort = 1; 2204 VATTR_NULL(&va); 2205 va.va_type = VLNK; 2206 if (v3) { 2207 va.va_mode = 0; 2208 nfsm_srvsattr(&va); 2209 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 2210 len2 = fxdr_unsigned(uint32_t, *tl); 2211 if (len2 > PATH_MAX) { 2212 /* XXX should check _PC_NO_TRUNC */ 2213 error = ENAMETOOLONG; 2214 goto abortop; 2215 } 2216 } 2217 else { 2218 /* NFSv2 */ 2219 nfsm_strsiz(len2, NFS_MAXPATHLEN); 2220 } 2221 pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); 2222 iv.iov_base = pathcp; 2223 iv.iov_len = len2; 2224 io.uio_resid = len2; 2225 io.uio_offset = 0; 2226 io.uio_iov = &iv; 2227 io.uio_iovcnt = 1; 2228 io.uio_rw = UIO_READ; 2229 UIO_SETUP_SYSSPACE(&io); 2230 nfsm_mtouio(&io, len2); 2231 if (!v3) { 2232 nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2233 va.va_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 2234 } 2235 *(pathcp + len2) = '\0'; 2236 if (nd.ni_vp) { 2237 error = EEXIST; 2238 abortop: 2239 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2240 if (nd.ni_dvp == nd.ni_vp) 2241 vrele(nd.ni_dvp); 2242 else 2243 vput(nd.ni_dvp); 2244 if (nd.ni_vp) 2245 vrele(nd.ni_vp); 2246 goto out; 2247 } 2248 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2249 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, pathcp); 2250 if (!error) { 2251 if (v3) { 2252 error = nfsrv_composefh(nd.ni_vp, &nsfh, v3); 2253 if (!error) 2254 error = VOP_GETATTR(nd.ni_vp, &va, cred); 2255 vput(nd.ni_vp); 2256 } else { 2257 vput(nd.ni_vp); 2258 } 2259 } 2260 out: 2261 if (pathcp) 2262 free(pathcp, M_TEMP); 2263 if (dirp) { 2264 if (v3) { 2265 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2266 } 2267 vrele(dirp); 2268 dirp = NULL; 2269 } 2270 abort = 0; 2271 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2272 NFSX_WCCDATA(v3)); 2273 if (v3) { 2274 if (!error) { 2275 nfsm_srvpostop_fh(&nsfh); 2276 nfsm_srvpostop_attr(0, &va); 2277 } 2278 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2279 } 2280 return (0); 2281 nfsmout: 2282 if (abort) { 2283 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2284 if (nd.ni_dvp == nd.ni_vp) 2285 vrele(nd.ni_dvp); 2286 else 2287 vput(nd.ni_dvp); 2288 if (nd.ni_vp) 2289 vrele(nd.ni_vp); 2290 } 2291 if (dirp) 2292 vrele(dirp); 2293 if (pathcp) 2294 free(pathcp, M_TEMP); 2295 return (error); 2296 } 2297 2298 /* 2299 * nfs mkdir service 2300 */ 2301 int 2302 nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, 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 abort = 0; 2317 int v3 = (nfsd->nd_flag & ND_NFSV3); 2318 char *cp2; 2319 struct mbuf *mb, *mreq; 2320 struct vnode *vp, *dirp = (struct vnode *)0; 2321 nfsrvfh_t nsfh; 2322 u_quad_t frev; 2323 2324 nfsm_srvmtofh(&nsfh); 2325 nfsm_srvnamesiz(len); 2326 nd.ni_cnd.cn_cred = cred; 2327 nd.ni_cnd.cn_nameiop = CREATE; 2328 nd.ni_cnd.cn_flags = LOCKPARENT; 2329 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2330 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2331 if (dirp && v3) { 2332 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2333 } 2334 if (error) { 2335 nfsm_reply(NFSX_WCCDATA(v3)); 2336 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2337 if (dirp) 2338 vrele(dirp); 2339 return (0); 2340 } 2341 abort = 1; 2342 VATTR_NULL(&va); 2343 if (v3) { 2344 va.va_mode = 0; 2345 nfsm_srvsattr(&va); 2346 } else { 2347 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2348 va.va_mode = nfstov_mode(*tl++); 2349 } 2350 va.va_type = VDIR; 2351 vp = nd.ni_vp; 2352 if (vp != NULL) { 2353 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2354 if (nd.ni_dvp == vp) 2355 vrele(nd.ni_dvp); 2356 else 2357 vput(nd.ni_dvp); 2358 vrele(vp); 2359 error = EEXIST; 2360 goto out; 2361 } 2362 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2363 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va); 2364 if (!error) { 2365 vp = nd.ni_vp; 2366 error = nfsrv_composefh(vp, &nsfh, v3); 2367 if (!error) 2368 error = VOP_GETATTR(vp, &va, cred); 2369 vput(vp); 2370 } 2371 out: 2372 if (dirp) { 2373 if (v3) { 2374 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2375 } 2376 vrele(dirp); 2377 dirp = NULL; 2378 } 2379 abort = 0; 2380 nfsm_reply(NFSX_SRVFH(&nsfh, v3) + NFSX_POSTOPATTR(v3) + 2381 NFSX_WCCDATA(v3)); 2382 if (v3) { 2383 if (!error) { 2384 nfsm_srvpostop_fh(&nsfh); 2385 nfsm_srvpostop_attr(0, &va); 2386 } 2387 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2388 } else { 2389 nfsm_srvfhtom(&nsfh, v3); 2390 nfsm_build(fp, struct nfs_fattr *, NFSX_V2FATTR); 2391 nfsm_srvfillattr(&va, fp); 2392 } 2393 return (0); 2394 nfsmout: 2395 if (abort) { 2396 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2397 if (nd.ni_dvp == nd.ni_vp) 2398 vrele(nd.ni_dvp); 2399 else 2400 vput(nd.ni_dvp); 2401 if (nd.ni_vp) 2402 vrele(nd.ni_vp); 2403 } 2404 if (dirp) 2405 vrele(dirp); 2406 return (error); 2407 } 2408 2409 /* 2410 * nfs rmdir service 2411 */ 2412 int 2413 nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2414 { 2415 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2416 struct mbuf *nam = nfsd->nd_nam; 2417 char *dpos = nfsd->nd_dpos; 2418 kauth_cred_t cred = nfsd->nd_cr; 2419 u_int32_t *tl; 2420 int32_t t1; 2421 char *bpos; 2422 int error = 0, cache = 0, len, dirfor_ret = 1, diraft_ret = 1; 2423 int v3 = (nfsd->nd_flag & ND_NFSV3); 2424 char *cp2; 2425 struct mbuf *mb, *mreq; 2426 struct vnode *vp, *dirp = (struct vnode *)0; 2427 struct vattr dirfor, diraft; 2428 nfsrvfh_t nsfh; 2429 struct nameidata nd; 2430 u_quad_t frev; 2431 2432 nfsm_srvmtofh(&nsfh); 2433 nfsm_srvnamesiz(len); 2434 nd.ni_cnd.cn_cred = cred; 2435 nd.ni_cnd.cn_nameiop = DELETE; 2436 nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 2437 error = nfs_namei(&nd, &nsfh, len, slp, nam, &md, &dpos, 2438 &dirp, lwp, (nfsd->nd_flag & ND_KERBAUTH), false); 2439 if (dirp && v3) { 2440 dirfor_ret = VOP_GETATTR(dirp, &dirfor, cred); 2441 } 2442 if (error) { 2443 nfsm_reply(NFSX_WCCDATA(v3)); 2444 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2445 if (dirp) 2446 vrele(dirp); 2447 return (0); 2448 } 2449 vp = nd.ni_vp; 2450 if (vp->v_type != VDIR) { 2451 error = ENOTDIR; 2452 goto out; 2453 } 2454 /* 2455 * No rmdir "." please. 2456 */ 2457 if (nd.ni_dvp == vp) { 2458 error = EINVAL; 2459 goto out; 2460 } 2461 /* 2462 * The root of a mounted filesystem cannot be deleted. 2463 */ 2464 if (vp->v_vflag & VV_ROOT) 2465 error = EBUSY; 2466 out: 2467 if (!error) { 2468 nqsrv_getl(nd.ni_dvp, ND_WRITE); 2469 nqsrv_getl(vp, ND_WRITE); 2470 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 2471 } else { 2472 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 2473 if (nd.ni_dvp == nd.ni_vp) 2474 vrele(nd.ni_dvp); 2475 else 2476 vput(nd.ni_dvp); 2477 vput(vp); 2478 } 2479 if (dirp) { 2480 if (v3) { 2481 diraft_ret = VOP_GETATTR(dirp, &diraft, cred); 2482 } 2483 vrele(dirp); 2484 } 2485 nfsm_reply(NFSX_WCCDATA(v3)); 2486 if (v3) { 2487 nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); 2488 return (0); 2489 } 2490 nfsm_srvdone; 2491 } 2492 2493 /* 2494 * nfs readdir service 2495 * - mallocs what it thinks is enough to read 2496 * count rounded up to a multiple of NFS_SRVDIRBLKSIZ <= NFS_MAXREADDIR 2497 * - calls VOP_READDIR() 2498 * - loops around building the reply 2499 * if the output generated exceeds count break out of loop 2500 * The nfsm_clget macro is used here so that the reply will be packed 2501 * tightly in mbuf clusters. 2502 * - it only knows that it has encountered eof when the VOP_READDIR() 2503 * reads nothing 2504 * - as such one readdir rpc will return eof false although you are there 2505 * and then the next will return eof 2506 * - it trims out records with d_fileno == 0 2507 * this doesn't matter for Unix clients, but they might confuse clients 2508 * for other os'. 2509 * - it trims out records with d_type == DT_WHT 2510 * these cannot be seen through NFS (unless we extend the protocol) 2511 * NB: It is tempting to set eof to true if the VOP_READDIR() reads less 2512 * than requested, but this may not apply to all filesystems. For 2513 * example, client NFS does not { although it is never remote mounted 2514 * anyhow } 2515 * The alternate call nfsrv_readdirplus() does lookups as well. 2516 * PS: The NFS protocol spec. does not clarify what the "count" byte 2517 * argument is a count of.. just name strings and file id's or the 2518 * entire reply rpc or ... 2519 * I tried just file name and id sizes and it confused the Sun client, 2520 * so I am using the full rpc size now. The "paranoia.." comment refers 2521 * to including the status longwords that are not a part of the dir. 2522 * "entry" structures, but are in the rpc. 2523 */ 2524 2525 #define NFS_SRVDIRBLKSIZ 1024 2526 2527 struct flrep { 2528 nfsuint64 fl_off; 2529 u_int32_t fl_postopok; 2530 struct nfs_fattr fl_fattr; /* XXX: must be of fattr3 size */ 2531 u_int32_t fl_fhok; 2532 u_int32_t fl_fhsize; 2533 /* handle comes here, filled in dynamically */ 2534 }; 2535 2536 int 2537 nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2538 { 2539 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2540 struct mbuf *nam = nfsd->nd_nam; 2541 char *dpos = nfsd->nd_dpos; 2542 kauth_cred_t cred = nfsd->nd_cr; 2543 char *bp, *be; 2544 struct mbuf *mp; 2545 struct dirent *dp; 2546 char *cp; 2547 u_int32_t *tl; 2548 int32_t t1; 2549 char *bpos; 2550 struct mbuf *mb, *mreq, *mp2; 2551 char *cpos, *cend, *cp2, *rbuf; 2552 struct vnode *vp; 2553 struct vattr at; 2554 nfsrvfh_t nsfh; 2555 struct uio io; 2556 struct iovec iv; 2557 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2558 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, ncookies; 2559 int v3 = (nfsd->nd_flag & ND_NFSV3); 2560 u_quad_t frev, off, toff, verf; 2561 off_t *cookies = NULL, *cookiep; 2562 nfsuint64 jar; 2563 2564 nfsm_srvmtofh(&nsfh); 2565 if (v3) { 2566 nfsm_dissect(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2567 toff = fxdr_hyper(tl); 2568 tl += 2; 2569 verf = fxdr_hyper(tl); 2570 tl += 2; 2571 } else { 2572 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2573 toff = fxdr_unsigned(u_quad_t, *tl++); 2574 } 2575 off = toff; 2576 cnt = fxdr_unsigned(int, *tl); 2577 siz = ((cnt + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2578 xfer = NFS_SRVMAXDATA(nfsd); 2579 if (siz > xfer) 2580 siz = xfer; 2581 fullsiz = siz; 2582 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2583 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2584 if (!error && vp->v_type != VDIR) { 2585 error = ENOTDIR; 2586 vput(vp); 2587 } 2588 if (error) { 2589 nfsm_reply(NFSX_UNSIGNED); 2590 nfsm_srvpostop_attr(getret, &at); 2591 return (0); 2592 } 2593 nqsrv_getl(vp, ND_READ); 2594 if (v3) { 2595 error = getret = VOP_GETATTR(vp, &at, cred); 2596 #ifdef NFS3_STRICTVERF 2597 /* 2598 * XXX This check is too strict for Solaris 2.5 clients. 2599 */ 2600 if (!error && toff && verf != at.va_filerev) 2601 error = NFSERR_BAD_COOKIE; 2602 #endif 2603 } 2604 if (!error) 2605 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2606 if (error) { 2607 vput(vp); 2608 nfsm_reply(NFSX_POSTOPATTR(v3)); 2609 nfsm_srvpostop_attr(getret, &at); 2610 return (0); 2611 } 2612 VOP_UNLOCK(vp, 0); 2613 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2614 again: 2615 iv.iov_base = rbuf; 2616 iv.iov_len = fullsiz; 2617 io.uio_iov = &iv; 2618 io.uio_iovcnt = 1; 2619 io.uio_offset = (off_t)off; 2620 io.uio_resid = fullsiz; 2621 io.uio_rw = UIO_READ; 2622 UIO_SETUP_SYSSPACE(&io); 2623 eofflag = 0; 2624 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2625 2626 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2627 2628 off = (off_t)io.uio_offset; 2629 if (!cookies && !error) 2630 error = NFSERR_PERM; 2631 if (v3) { 2632 getret = VOP_GETATTR(vp, &at, cred); 2633 if (!error) 2634 error = getret; 2635 } 2636 2637 VOP_UNLOCK(vp, 0); 2638 if (error) { 2639 vrele(vp); 2640 free((void *)rbuf, M_TEMP); 2641 if (cookies) 2642 free((void *)cookies, M_TEMP); 2643 nfsm_reply(NFSX_POSTOPATTR(v3)); 2644 nfsm_srvpostop_attr(getret, &at); 2645 return (0); 2646 } 2647 if (io.uio_resid) { 2648 siz -= io.uio_resid; 2649 2650 /* 2651 * If nothing read, return eof 2652 * rpc reply 2653 */ 2654 if (siz == 0) { 2655 vrele(vp); 2656 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + 2657 2 * NFSX_UNSIGNED); 2658 if (v3) { 2659 nfsm_srvpostop_attr(getret, &at); 2660 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2661 txdr_hyper(at.va_filerev, tl); 2662 tl += 2; 2663 } else 2664 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2665 *tl++ = nfs_false; 2666 *tl = nfs_true; 2667 free((void *)rbuf, M_TEMP); 2668 free((void *)cookies, M_TEMP); 2669 return (0); 2670 } 2671 } 2672 2673 /* 2674 * Check for degenerate cases of nothing useful read. 2675 * If so go try again 2676 */ 2677 cpos = rbuf; 2678 cend = rbuf + siz; 2679 dp = (struct dirent *)cpos; 2680 cookiep = cookies; 2681 2682 while (cpos < cend && ncookies > 0 && 2683 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2684 cpos += dp->d_reclen; 2685 dp = (struct dirent *)cpos; 2686 cookiep++; 2687 ncookies--; 2688 } 2689 if (cpos >= cend || ncookies == 0) { 2690 toff = off; 2691 siz = fullsiz; 2692 free(cookies, M_TEMP); 2693 cookies = NULL; 2694 goto again; 2695 } 2696 2697 len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ 2698 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); 2699 if (v3) { 2700 nfsm_srvpostop_attr(getret, &at); 2701 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2702 txdr_hyper(at.va_filerev, tl); 2703 } 2704 mp = mp2 = mb; 2705 bp = bpos; 2706 be = bp + M_TRAILINGSPACE(mp); 2707 2708 /* Loop through the records and build reply */ 2709 while (cpos < cend && ncookies > 0) { 2710 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2711 nlen = dp->d_namlen; 2712 rem = nfsm_rndup(nlen)-nlen; 2713 len += (4 * NFSX_UNSIGNED + nlen + rem); 2714 if (v3) 2715 len += 2 * NFSX_UNSIGNED; 2716 if (len > cnt) { 2717 eofflag = 0; 2718 break; 2719 } 2720 /* 2721 * Build the directory record xdr from 2722 * the dirent entry. 2723 */ 2724 nfsm_clget; 2725 *tl = nfs_true; 2726 bp += NFSX_UNSIGNED; 2727 if (v3) { 2728 nfsm_clget; 2729 *tl = txdr_unsigned(dp->d_fileno >> 32); 2730 bp += NFSX_UNSIGNED; 2731 } 2732 nfsm_clget; 2733 *tl = txdr_unsigned(dp->d_fileno); 2734 bp += NFSX_UNSIGNED; 2735 nfsm_clget; 2736 *tl = txdr_unsigned(nlen); 2737 bp += NFSX_UNSIGNED; 2738 2739 /* And loop around copying the name */ 2740 xfer = nlen; 2741 cp = dp->d_name; 2742 while (xfer > 0) { 2743 nfsm_clget; 2744 if ((bp+xfer) > be) 2745 tsiz = be-bp; 2746 else 2747 tsiz = xfer; 2748 memcpy(bp, cp, tsiz); 2749 bp += tsiz; 2750 xfer -= tsiz; 2751 if (xfer > 0) 2752 cp += tsiz; 2753 } 2754 /* And null pad to an int32_t boundary */ 2755 for (i = 0; i < rem; i++) 2756 *bp++ = '\0'; 2757 nfsm_clget; 2758 2759 /* Finish off the record */ 2760 txdr_hyper(*cookiep, &jar); 2761 if (v3) { 2762 *tl = jar.nfsuquad[0]; 2763 bp += NFSX_UNSIGNED; 2764 nfsm_clget; 2765 } 2766 *tl = jar.nfsuquad[1]; 2767 bp += NFSX_UNSIGNED; 2768 } 2769 cpos += dp->d_reclen; 2770 dp = (struct dirent *)cpos; 2771 cookiep++; 2772 ncookies--; 2773 } 2774 vrele(vp); 2775 nfsm_clget; 2776 *tl = nfs_false; 2777 bp += NFSX_UNSIGNED; 2778 nfsm_clget; 2779 if (eofflag) 2780 *tl = nfs_true; 2781 else 2782 *tl = nfs_false; 2783 bp += NFSX_UNSIGNED; 2784 if (mp != mb) { 2785 if (bp < be) 2786 mp->m_len = bp - mtod(mp, char *); 2787 } else 2788 mp->m_len += bp - bpos; 2789 free((void *)rbuf, M_TEMP); 2790 free((void *)cookies, M_TEMP); 2791 nfsm_srvdone; 2792 } 2793 2794 int 2795 nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 2796 { 2797 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 2798 struct mbuf *nam = nfsd->nd_nam; 2799 char *dpos = nfsd->nd_dpos; 2800 kauth_cred_t cred = nfsd->nd_cr; 2801 char *bp, *be; 2802 struct mbuf *mp; 2803 struct dirent *dp; 2804 char *cp; 2805 u_int32_t *tl; 2806 int32_t t1; 2807 char *bpos; 2808 struct mbuf *mb, *mreq, *mp2; 2809 char *cpos, *cend, *cp2, *rbuf; 2810 struct vnode *vp, *nvp; 2811 struct flrep fl; 2812 nfsrvfh_t nsfh; 2813 struct uio io; 2814 struct iovec iv; 2815 struct vattr va, at, *vap = &va; 2816 struct nfs_fattr *fp; 2817 int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; 2818 int siz, cnt, fullsiz, eofflag, rdonly, cache = 0, dirlen, ncookies; 2819 u_quad_t frev, off, toff, verf; 2820 off_t *cookies = NULL, *cookiep; 2821 2822 nfsm_srvmtofh(&nsfh); 2823 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2824 toff = fxdr_hyper(tl); 2825 tl += 2; 2826 verf = fxdr_hyper(tl); 2827 tl += 2; 2828 siz = fxdr_unsigned(int, *tl++); 2829 cnt = fxdr_unsigned(int, *tl); 2830 off = toff; 2831 siz = ((siz + NFS_SRVDIRBLKSIZ - 1) & ~(NFS_SRVDIRBLKSIZ - 1)); 2832 xfer = NFS_SRVMAXDATA(nfsd); 2833 if (siz > xfer) 2834 siz = xfer; 2835 fullsiz = siz; 2836 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 2837 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 2838 if (!error && vp->v_type != VDIR) { 2839 error = ENOTDIR; 2840 vput(vp); 2841 } 2842 if (error) { 2843 nfsm_reply(NFSX_UNSIGNED); 2844 nfsm_srvpostop_attr(getret, &at); 2845 return (0); 2846 } 2847 error = getret = VOP_GETATTR(vp, &at, cred); 2848 #ifdef NFS3_STRICTVERF 2849 /* 2850 * XXX This check is too strict for Solaris 2.5 clients. 2851 */ 2852 if (!error && toff && verf != at.va_filerev) 2853 error = NFSERR_BAD_COOKIE; 2854 #endif 2855 if (!error) { 2856 nqsrv_getl(vp, ND_READ); 2857 error = nfsrv_access(vp, VEXEC, cred, rdonly, lwp, 0); 2858 } 2859 if (error) { 2860 vput(vp); 2861 nfsm_reply(NFSX_V3POSTOPATTR); 2862 nfsm_srvpostop_attr(getret, &at); 2863 return (0); 2864 } 2865 VOP_UNLOCK(vp, 0); 2866 2867 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2868 again: 2869 iv.iov_base = rbuf; 2870 iv.iov_len = fullsiz; 2871 io.uio_iov = &iv; 2872 io.uio_iovcnt = 1; 2873 io.uio_offset = (off_t)off; 2874 io.uio_resid = fullsiz; 2875 io.uio_rw = UIO_READ; 2876 UIO_SETUP_SYSSPACE(&io); 2877 eofflag = 0; 2878 2879 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2880 2881 error = VOP_READDIR(vp, &io, cred, &eofflag, &cookies, &ncookies); 2882 2883 off = (u_quad_t)io.uio_offset; 2884 getret = VOP_GETATTR(vp, &at, cred); 2885 2886 VOP_UNLOCK(vp, 0); 2887 2888 /* 2889 * If the VGET operation doesn't work for this filesystem, 2890 * we can't support readdirplus. Returning NOTSUPP should 2891 * make clients fall back to plain readdir. 2892 * There's no need to check for VPTOFH as well, we wouldn't 2893 * even be here otherwise. 2894 */ 2895 if (!getret) { 2896 if ((getret = VFS_VGET(vp->v_mount, at.va_fileid, &nvp))) 2897 getret = (getret == EOPNOTSUPP) ? 2898 NFSERR_NOTSUPP : NFSERR_IO; 2899 else 2900 vput(nvp); 2901 } 2902 2903 if (!cookies && !error) 2904 error = NFSERR_PERM; 2905 if (!error) 2906 error = getret; 2907 if (error) { 2908 vrele(vp); 2909 if (cookies) 2910 free((void *)cookies, M_TEMP); 2911 free((void *)rbuf, M_TEMP); 2912 nfsm_reply(NFSX_V3POSTOPATTR); 2913 nfsm_srvpostop_attr(getret, &at); 2914 return (0); 2915 } 2916 if (io.uio_resid) { 2917 siz -= io.uio_resid; 2918 2919 /* 2920 * If nothing read, return eof 2921 * rpc reply 2922 */ 2923 if (siz == 0) { 2924 vrele(vp); 2925 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2926 2 * NFSX_UNSIGNED); 2927 nfsm_srvpostop_attr(getret, &at); 2928 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2929 txdr_hyper(at.va_filerev, tl); 2930 tl += 2; 2931 *tl++ = nfs_false; 2932 *tl = nfs_true; 2933 free((void *)cookies, M_TEMP); 2934 free((void *)rbuf, M_TEMP); 2935 return (0); 2936 } 2937 } 2938 2939 /* 2940 * Check for degenerate cases of nothing useful read. 2941 * If so go try again 2942 */ 2943 cpos = rbuf; 2944 cend = rbuf + siz; 2945 dp = (struct dirent *)cpos; 2946 cookiep = cookies; 2947 2948 while (cpos < cend && ncookies > 0 && 2949 (dp->d_fileno == 0 || dp->d_type == DT_WHT)) { 2950 cpos += dp->d_reclen; 2951 dp = (struct dirent *)cpos; 2952 cookiep++; 2953 ncookies--; 2954 } 2955 if (cpos >= cend || ncookies == 0) { 2956 toff = off; 2957 siz = fullsiz; 2958 free(cookies, M_TEMP); 2959 cookies = NULL; 2960 goto again; 2961 } 2962 2963 dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + 2 * NFSX_UNSIGNED; 2964 nfsm_reply(cnt); 2965 nfsm_srvpostop_attr(getret, &at); 2966 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2967 txdr_hyper(at.va_filerev, tl); 2968 mp = mp2 = mb; 2969 bp = bpos; 2970 be = bp + M_TRAILINGSPACE(mp); 2971 2972 /* Loop through the records and build reply */ 2973 while (cpos < cend && ncookies > 0) { 2974 if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { 2975 nfsrvfh_t nnsfh; 2976 2977 nlen = dp->d_namlen; 2978 rem = nfsm_rndup(nlen)-nlen; 2979 2980 /* 2981 * For readdir_and_lookup get the vnode using 2982 * the file number. 2983 */ 2984 if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) 2985 goto invalid; 2986 if (nfsrv_composefh(nvp, &nnsfh, true)) { 2987 vput(nvp); 2988 goto invalid; 2989 } 2990 if (VOP_GETATTR(nvp, vap, cred)) { 2991 vput(nvp); 2992 goto invalid; 2993 } 2994 vput(nvp); 2995 2996 /* 2997 * If either the dircount or maxcount will be 2998 * exceeded, get out now. Both of these lengths 2999 * are calculated conservatively, including all 3000 * XDR overheads. 3001 */ 3002 len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + 3003 NFSX_V3POSTOPATTR); 3004 dirlen += (6 * NFSX_UNSIGNED + nlen + rem); 3005 if (len > cnt || dirlen > fullsiz) { 3006 eofflag = 0; 3007 break; 3008 } 3009 3010 /* 3011 * Build the directory record xdr from 3012 * the dirent entry. 3013 */ 3014 fp = (struct nfs_fattr *)&fl.fl_fattr; 3015 nfsm_srvfillattr(vap, fp); 3016 fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); 3017 fl.fl_fhok = nfs_true; 3018 fl.fl_postopok = nfs_true; 3019 txdr_hyper(*cookiep, fl.fl_off.nfsuquad); 3020 3021 nfsm_clget; 3022 *tl = nfs_true; 3023 bp += NFSX_UNSIGNED; 3024 nfsm_clget; 3025 *tl = txdr_unsigned(dp->d_fileno >> 32); 3026 bp += NFSX_UNSIGNED; 3027 nfsm_clget; 3028 *tl = txdr_unsigned(dp->d_fileno); 3029 bp += NFSX_UNSIGNED; 3030 nfsm_clget; 3031 *tl = txdr_unsigned(nlen); 3032 bp += NFSX_UNSIGNED; 3033 3034 /* And loop around copying the name */ 3035 xfer = nlen; 3036 cp = dp->d_name; 3037 while (xfer > 0) { 3038 nfsm_clget; 3039 if ((bp + xfer) > be) 3040 tsiz = be - bp; 3041 else 3042 tsiz = xfer; 3043 memcpy(bp, cp, tsiz); 3044 bp += tsiz; 3045 xfer -= tsiz; 3046 if (xfer > 0) 3047 cp += tsiz; 3048 } 3049 /* And null pad to an int32_t boundary */ 3050 for (i = 0; i < rem; i++) 3051 *bp++ = '\0'; 3052 3053 /* 3054 * Now copy the flrep structure out. 3055 */ 3056 xfer = sizeof(struct flrep); 3057 cp = (void *)&fl; 3058 while (xfer > 0) { 3059 nfsm_clget; 3060 if ((bp + xfer) > be) 3061 tsiz = be - bp; 3062 else 3063 tsiz = xfer; 3064 memcpy(bp, cp, tsiz); 3065 bp += tsiz; 3066 xfer -= tsiz; 3067 if (xfer > 0) 3068 cp += tsiz; 3069 } 3070 3071 /* 3072 * ... and filehandle. 3073 */ 3074 xfer = NFSRVFH_SIZE(&nnsfh); 3075 cp = NFSRVFH_DATA(&nnsfh); 3076 while (xfer > 0) { 3077 nfsm_clget; 3078 if ((bp + xfer) > be) 3079 tsiz = be - bp; 3080 else 3081 tsiz = xfer; 3082 memcpy(bp, cp, tsiz); 3083 bp += tsiz; 3084 xfer -= tsiz; 3085 if (xfer > 0) 3086 cp += tsiz; 3087 } 3088 } 3089 invalid: 3090 cpos += dp->d_reclen; 3091 dp = (struct dirent *)cpos; 3092 cookiep++; 3093 ncookies--; 3094 } 3095 vrele(vp); 3096 nfsm_clget; 3097 *tl = nfs_false; 3098 bp += NFSX_UNSIGNED; 3099 nfsm_clget; 3100 if (eofflag) 3101 *tl = nfs_true; 3102 else 3103 *tl = nfs_false; 3104 bp += NFSX_UNSIGNED; 3105 if (mp != mb) { 3106 if (bp < be) 3107 mp->m_len = bp - mtod(mp, char *); 3108 } else 3109 mp->m_len += bp - bpos; 3110 free((void *)cookies, M_TEMP); 3111 free((void *)rbuf, M_TEMP); 3112 nfsm_srvdone; 3113 } 3114 3115 /* 3116 * nfs commit service 3117 */ 3118 int 3119 nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3120 { 3121 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3122 struct mbuf *nam = nfsd->nd_nam; 3123 char *dpos = nfsd->nd_dpos; 3124 kauth_cred_t cred = nfsd->nd_cr; 3125 struct vattr bfor, aft; 3126 struct vnode *vp; 3127 nfsrvfh_t nsfh; 3128 u_int32_t *tl; 3129 int32_t t1; 3130 char *bpos; 3131 int error = 0, rdonly, for_ret = 1, aft_ret = 1, cache = 0; 3132 uint32_t cnt; 3133 char *cp2; 3134 struct mbuf *mb, *mreq; 3135 u_quad_t frev, off, end; 3136 3137 nfsm_srvmtofh(&nsfh); 3138 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3139 3140 off = fxdr_hyper(tl); 3141 tl += 2; 3142 cnt = fxdr_unsigned(uint32_t, *tl); 3143 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3144 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3145 if (error) { 3146 nfsm_reply(2 * NFSX_UNSIGNED); 3147 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3148 return (0); 3149 } 3150 for_ret = VOP_GETATTR(vp, &bfor, cred); 3151 end = (cnt > 0) ? off + cnt : vp->v_size; 3152 if (end < off || end > vp->v_size) 3153 end = vp->v_size; 3154 if (off < vp->v_size) 3155 error = VOP_FSYNC(vp, cred, FSYNC_WAIT, off, end); 3156 /* else error == 0, from nfsrv_fhtovp() */ 3157 aft_ret = VOP_GETATTR(vp, &aft, cred); 3158 vput(vp); 3159 nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); 3160 nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); 3161 if (!error) { 3162 nfsm_build(tl, u_int32_t *, NFSX_V3WRITEVERF); 3163 *tl++ = txdr_unsigned(boottime.tv_sec); 3164 *tl = txdr_unsigned(boottime.tv_nsec / 1000); 3165 } else { 3166 return (0); 3167 } 3168 nfsm_srvdone; 3169 } 3170 3171 /* 3172 * nfs statfs service 3173 */ 3174 int 3175 nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3176 { 3177 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3178 struct mbuf *nam = nfsd->nd_nam; 3179 char *dpos = nfsd->nd_dpos; 3180 kauth_cred_t cred = nfsd->nd_cr; 3181 struct statvfs *sf = NULL; 3182 struct nfs_statfs *sfp; 3183 u_int32_t *tl; 3184 int32_t t1; 3185 char *bpos; 3186 int error = 0, rdonly, cache = 0, getret = 1; 3187 int v3 = (nfsd->nd_flag & ND_NFSV3); 3188 char *cp2; 3189 struct mbuf *mb, *mreq; 3190 struct vnode *vp; 3191 struct vattr at; 3192 nfsrvfh_t nsfh; 3193 u_quad_t frev, tval; 3194 3195 nfsm_srvmtofh(&nsfh); 3196 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3197 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3198 if (error) { 3199 nfsm_reply(NFSX_UNSIGNED); 3200 nfsm_srvpostop_attr(getret, &at); 3201 return (0); 3202 } 3203 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK); 3204 error = VFS_STATVFS(vp->v_mount, sf); 3205 getret = VOP_GETATTR(vp, &at, cred); 3206 vput(vp); 3207 nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); 3208 if (v3) 3209 nfsm_srvpostop_attr(getret, &at); 3210 if (error) { 3211 free(sf, M_TEMP); 3212 return (0); 3213 } 3214 nfsm_build(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); 3215 if (v3) { 3216 tval = (u_quad_t)((quad_t)sf->f_blocks * (quad_t)sf->f_frsize); 3217 txdr_hyper(tval, &sfp->sf_tbytes); 3218 tval = (u_quad_t)((quad_t)sf->f_bfree * (quad_t)sf->f_frsize); 3219 txdr_hyper(tval, &sfp->sf_fbytes); 3220 tval = (u_quad_t)((quad_t)sf->f_bavail * (quad_t)sf->f_frsize); 3221 txdr_hyper(tval, &sfp->sf_abytes); 3222 tval = (u_quad_t)sf->f_files; 3223 txdr_hyper(tval, &sfp->sf_tfiles); 3224 tval = (u_quad_t)sf->f_ffree; 3225 txdr_hyper(tval, &sfp->sf_ffiles); 3226 txdr_hyper(tval, &sfp->sf_afiles); 3227 sfp->sf_invarsec = 0; 3228 } else { 3229 sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); 3230 sfp->sf_bsize = txdr_unsigned(sf->f_frsize); 3231 sfp->sf_blocks = txdr_unsigned(sf->f_blocks); 3232 sfp->sf_bfree = txdr_unsigned(sf->f_bfree); 3233 sfp->sf_bavail = txdr_unsigned(sf->f_bavail); 3234 } 3235 nfsmout: 3236 if (sf) 3237 free(sf, M_TEMP); 3238 return error; 3239 } 3240 3241 /* 3242 * nfs fsinfo service 3243 */ 3244 int 3245 nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3246 { 3247 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3248 struct mbuf *nam = nfsd->nd_nam; 3249 char *dpos = nfsd->nd_dpos; 3250 kauth_cred_t cred = nfsd->nd_cr; 3251 u_int32_t *tl; 3252 struct nfsv3_fsinfo *sip; 3253 int32_t t1; 3254 char *bpos; 3255 int error = 0, rdonly, cache = 0, getret = 1; 3256 uint32_t maxdata; 3257 char *cp2; 3258 struct mbuf *mb, *mreq; 3259 struct vnode *vp; 3260 struct vattr at; 3261 nfsrvfh_t nsfh; 3262 u_quad_t frev, maxfsize; 3263 struct statvfs *sb; 3264 3265 nfsm_srvmtofh(&nsfh); 3266 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3267 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3268 if (error) { 3269 nfsm_reply(NFSX_UNSIGNED); 3270 nfsm_srvpostop_attr(getret, &at); 3271 return (0); 3272 } 3273 3274 /* XXX Try to make a guess on the max file size. */ 3275 sb = malloc(sizeof(*sb), M_TEMP, M_WAITOK); 3276 VFS_STATVFS(vp->v_mount, sb); 3277 maxfsize = (u_quad_t)0x80000000 * sb->f_frsize - 1; 3278 free(sb, M_TEMP); 3279 3280 getret = VOP_GETATTR(vp, &at, cred); 3281 vput(vp); 3282 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); 3283 nfsm_srvpostop_attr(getret, &at); 3284 nfsm_build(sip, struct nfsv3_fsinfo *, NFSX_V3FSINFO); 3285 3286 /* 3287 * XXX 3288 * There should be file system VFS OP(s) to get this information. 3289 * For now, assume ufs. 3290 */ 3291 if (slp->ns_so->so_type == SOCK_DGRAM) 3292 maxdata = NFS_MAXDGRAMDATA; 3293 else 3294 maxdata = NFS_MAXDATA; 3295 sip->fs_rtmax = txdr_unsigned(maxdata); 3296 sip->fs_rtpref = txdr_unsigned(maxdata); 3297 sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); 3298 sip->fs_wtmax = txdr_unsigned(maxdata); 3299 sip->fs_wtpref = txdr_unsigned(maxdata); 3300 sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); 3301 sip->fs_dtpref = txdr_unsigned(maxdata); 3302 txdr_hyper(maxfsize, &sip->fs_maxfilesize); 3303 sip->fs_timedelta.nfsv3_sec = 0; 3304 sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); 3305 sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | 3306 NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | 3307 NFSV3FSINFO_CANSETTIME); 3308 nfsm_srvdone; 3309 } 3310 3311 /* 3312 * nfs pathconf service 3313 */ 3314 int 3315 nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, struct lwp *lwp, struct mbuf **mrq) 3316 { 3317 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; 3318 struct mbuf *nam = nfsd->nd_nam; 3319 char *dpos = nfsd->nd_dpos; 3320 kauth_cred_t cred = nfsd->nd_cr; 3321 u_int32_t *tl; 3322 struct nfsv3_pathconf *pc; 3323 int32_t t1; 3324 char *bpos; 3325 int error = 0, rdonly, cache = 0, getret = 1; 3326 register_t linkmax, namemax, chownres, notrunc; 3327 char *cp2; 3328 struct mbuf *mb, *mreq; 3329 struct vnode *vp; 3330 struct vattr at; 3331 nfsrvfh_t nsfh; 3332 u_quad_t frev; 3333 3334 nfsm_srvmtofh(&nsfh); 3335 error = nfsrv_fhtovp(&nsfh, 1, &vp, cred, slp, nam, 3336 &rdonly, (nfsd->nd_flag & ND_KERBAUTH), false); 3337 if (error) { 3338 nfsm_reply(NFSX_UNSIGNED); 3339 nfsm_srvpostop_attr(getret, &at); 3340 return (0); 3341 } 3342 error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); 3343 if (!error) 3344 error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); 3345 if (!error) 3346 error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); 3347 if (!error) 3348 error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); 3349 getret = VOP_GETATTR(vp, &at, cred); 3350 vput(vp); 3351 nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); 3352 nfsm_srvpostop_attr(getret, &at); 3353 if (error) 3354 return (0); 3355 nfsm_build(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF); 3356 3357 pc->pc_linkmax = txdr_unsigned(linkmax); 3358 pc->pc_namemax = txdr_unsigned(namemax); 3359 pc->pc_notrunc = txdr_unsigned(notrunc); 3360 pc->pc_chownrestricted = txdr_unsigned(chownres); 3361 3362 /* 3363 * These should probably be supported by VOP_PATHCONF(), but 3364 * until msdosfs is exportable (why would you want to?), the 3365 * Unix defaults should be ok. 3366 */ 3367 pc->pc_caseinsensitive = nfs_false; 3368 pc->pc_casepreserving = nfs_true; 3369 nfsm_srvdone; 3370 } 3371 3372 /* 3373 * Null operation, used by clients to ping server 3374 */ 3375 /* ARGSUSED */ 3376 int 3377 nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3378 struct lwp *lwp, struct mbuf **mrq) 3379 { 3380 struct mbuf *mrep = nfsd->nd_mrep; 3381 char *bpos; 3382 int error = NFSERR_RETVOID, cache = 0; 3383 struct mbuf *mb, *mreq; 3384 u_quad_t frev; 3385 3386 nfsm_reply(0); 3387 nfsmout: 3388 return (0); 3389 } 3390 3391 /* 3392 * No operation, used for obsolete procedures 3393 */ 3394 /* ARGSUSED */ 3395 int 3396 nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, 3397 struct lwp *lwp, struct mbuf **mrq) 3398 { 3399 struct mbuf *mrep = nfsd->nd_mrep; 3400 char *bpos; 3401 int error, cache = 0; 3402 struct mbuf *mb, *mreq; 3403 u_quad_t frev; 3404 3405 if (nfsd->nd_repstat) 3406 error = nfsd->nd_repstat; 3407 else 3408 error = EPROCUNAVAIL; 3409 nfsm_reply(0); 3410 nfsmout: 3411 return (0); 3412 } 3413 3414 /* 3415 * Perform access checking for vnodes obtained from file handles that would 3416 * refer to files already opened by a Unix client. You cannot just use 3417 * vn_writechk() and VOP_ACCESS() for two reasons. 3418 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case 3419 * 2 - The owner is to be given access irrespective of mode bits for some 3420 * operations, so that processes that chmod after opening a file don't 3421 * break. I don't like this because it opens a security hole, but since 3422 * the nfs server opens a security hole the size of a barn door anyhow, 3423 * what the heck. 3424 * 3425 * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() 3426 * will return EPERM instead of EACCESS. EPERM is always an error. 3427 */ 3428 int 3429 nfsrv_access(struct vnode *vp, int flags, kauth_cred_t cred, int rdonly, struct lwp *lwp, int override) 3430 { 3431 struct vattr vattr; 3432 int error; 3433 if (flags & VWRITE) { 3434 /* Just vn_writechk() changed to check rdonly */ 3435 /* 3436 * Disallow write attempts on read-only file systems; 3437 * unless the file is a socket or a block or character 3438 * device resident on the file system. 3439 */ 3440 if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3441 switch (vp->v_type) { 3442 case VREG: 3443 case VDIR: 3444 case VLNK: 3445 return (EROFS); 3446 default: 3447 break; 3448 } 3449 } 3450 3451 /* 3452 * If the vnode is in use as a process's text, 3453 * we can't allow writing. 3454 */ 3455 if (vp->v_iflag & VI_TEXT) 3456 return (ETXTBSY); 3457 } 3458 error = VOP_GETATTR(vp, &vattr, cred); 3459 if (error) 3460 return (error); 3461 error = VOP_ACCESS(vp, flags, cred); 3462 /* 3463 * Allow certain operations for the owner (reads and writes 3464 * on files that are already open). 3465 */ 3466 if (override && error == EACCES && kauth_cred_geteuid(cred) == vattr.va_uid) 3467 error = 0; 3468 return error; 3469 } 3470
Indexes created Mon Sep 22 10:09:38 GMT 2025