1 /* $OpenBSD: nfs_vnops.c,v 1.55 2003/06/02 23:28:20 millert Exp $ */ 2 /* $NetBSD: nfs_vnops.c,v 1.62.4.1 1996/07/08 20:26:52 jtc Exp $ */ 3 4 /* 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Rick Macklem at The University of Guelph. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 36 */ 37 38 39 /* 40 * vnode op calls for Sun NFS version 2 and 3 41 */ 42 43 #include <sys/param.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/systm.h> 47 #include <sys/resourcevar.h> 48 #include <sys/proc.h> 49 #include <sys/mount.h> 50 #include <sys/buf.h> 51 #include <sys/malloc.h> 52 #include <sys/mbuf.h> 53 #include <sys/conf.h> 54 #include <sys/namei.h> 55 #include <sys/vnode.h> 56 #include <sys/dirent.h> 57 #include <sys/fcntl.h> 58 #include <sys/lockf.h> 59 60 #include <uvm/uvm_extern.h> 61 62 #include <miscfs/specfs/specdev.h> 63 #include <miscfs/fifofs/fifo.h> 64 65 #include <nfs/rpcv2.h> 66 #include <nfs/nfsproto.h> 67 #include <nfs/nfs.h> 68 #include <nfs/nfsnode.h> 69 #include <nfs/nfsmount.h> 70 #include <nfs/xdr_subs.h> 71 #include <nfs/nfsm_subs.h> 72 #include <nfs/nfs_var.h> 73 74 #include <net/if.h> 75 #include <netinet/in.h> 76 #include <netinet/in_var.h> 77 78 /* Defs */ 79 #define TRUE 1 80 #define FALSE 0 81 82 /* 83 * Global vfs data structures for nfs 84 */ 85 int (**nfsv2_vnodeop_p)(void *); 86 struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 87 { &vop_default_desc, vn_default_error }, 88 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 89 { &vop_create_desc, nfs_create }, /* create */ 90 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 91 { &vop_open_desc, nfs_open }, /* open */ 92 { &vop_close_desc, nfs_close }, /* close */ 93 { &vop_access_desc, nfs_access }, /* access */ 94 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 95 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 96 { &vop_read_desc, nfs_read }, /* read */ 97 { &vop_write_desc, nfs_write }, /* write */ 98 { &vop_lease_desc, nfs_lease_check }, /* lease */ 99 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 100 { &vop_select_desc, nfs_select }, /* select */ 101 { &vop_kqfilter_desc, vop_generic_kqfilter }, /* kqfilter */ 102 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 103 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 104 { &vop_remove_desc, nfs_remove }, /* remove */ 105 { &vop_link_desc, nfs_link }, /* link */ 106 { &vop_rename_desc, nfs_rename }, /* rename */ 107 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 108 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 109 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 110 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 111 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 112 { &vop_abortop_desc, vop_generic_abortop }, /* abortop */ 113 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 114 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 115 { &vop_lock_desc, nfs_lock }, /* lock */ 116 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 117 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 118 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 119 { &vop_print_desc, nfs_print }, /* print */ 120 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 121 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 122 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 123 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 124 { &vop_bwrite_desc, nfs_bwrite }, 125 { NULL, NULL } 126 }; 127 struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 128 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 129 130 /* 131 * Special device vnode ops 132 */ 133 int (**spec_nfsv2nodeop_p)(void *); 134 struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 135 { &vop_default_desc, spec_vnoperate }, 136 { &vop_close_desc, nfsspec_close }, /* close */ 137 { &vop_access_desc, nfsspec_access }, /* access */ 138 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 139 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 140 { &vop_read_desc, nfsspec_read }, /* read */ 141 { &vop_write_desc, nfsspec_write }, /* write */ 142 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 143 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 144 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 145 { &vop_lock_desc, nfs_lock }, /* lock */ 146 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 147 { &vop_print_desc, nfs_print }, /* print */ 148 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 149 { NULL, NULL } 150 }; 151 struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 152 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 153 154 #ifdef FIFO 155 int (**fifo_nfsv2nodeop_p)(void *); 156 struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 157 { &vop_default_desc, fifo_vnoperate }, 158 { &vop_close_desc, nfsfifo_close }, /* close */ 159 { &vop_access_desc, nfsspec_access }, /* access */ 160 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 161 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 162 { &vop_read_desc, nfsfifo_read }, /* read */ 163 { &vop_write_desc, nfsfifo_write }, /* write */ 164 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 165 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 166 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 167 { &vop_lock_desc, nfs_lock }, /* lock */ 168 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 169 { &vop_print_desc, nfs_print }, /* print */ 170 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 171 { &vop_bwrite_desc, vop_generic_bwrite }, 172 { NULL, NULL } 173 }; 174 struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 175 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 176 #endif /* FIFO */ 177 178 /* 179 * Global variables 180 */ 181 extern u_int32_t nfs_true, nfs_false; 182 extern u_int32_t nfs_xdrneg1; 183 extern struct nfsstats nfsstats; 184 extern nfstype nfsv3_type[9]; 185 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 186 int nfs_numasync = 0; 187 188 /* 189 * nfs null call from vfs. 190 */ 191 int 192 nfs_null(vp, cred, procp) 193 struct vnode *vp; 194 struct ucred *cred; 195 struct proc *procp; 196 { 197 caddr_t bpos, dpos; 198 int error = 0; 199 struct mbuf *mreq, *mrep, *md, *mb; 200 201 nfsm_reqhead(vp, NFSPROC_NULL, 0); 202 nfsm_request(vp, NFSPROC_NULL, procp, cred); 203 nfsm_reqdone; 204 return (error); 205 } 206 207 /* 208 * nfs access vnode op. 209 * For nfs version 2, just return ok. File accesses may fail later. 210 * For nfs version 3, use the access rpc to check accessibility. If file modes 211 * are changed on the server, accesses might still fail later. 212 */ 213 int 214 nfs_access(v) 215 void *v; 216 { 217 struct vop_access_args /* { 218 struct vnode *a_vp; 219 int a_mode; 220 struct ucred *a_cred; 221 struct proc *a_p; 222 } */ *ap = v; 223 struct vnode *vp = ap->a_vp; 224 u_int32_t *tl; 225 caddr_t cp; 226 int32_t t1, t2; 227 caddr_t bpos, dpos, cp2; 228 int error = 0, attrflag; 229 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 230 u_int32_t mode, rmode; 231 int v3 = NFS_ISV3(vp); 232 233 /* 234 * Disallow write attempts on filesystems mounted read-only; 235 * unless the file is a socket, fifo, or a block or character 236 * device resident on the filesystem. 237 */ 238 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 239 switch (vp->v_type) { 240 case VREG: 241 case VDIR: 242 case VLNK: 243 return (EROFS); 244 default: 245 break; 246 } 247 } 248 /* 249 * For nfs v3, do an access rpc, otherwise you are stuck emulating 250 * ufs_access() locally using the vattr. This may not be correct, 251 * since the server may apply other access criteria such as 252 * client uid-->server uid mapping that we do not know about, but 253 * this is better than just returning anything that is lying about 254 * in the cache. 255 */ 256 if (v3) { 257 nfsstats.rpccnt[NFSPROC_ACCESS]++; 258 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 259 nfsm_fhtom(vp, v3); 260 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 261 if (ap->a_mode & VREAD) 262 mode = NFSV3ACCESS_READ; 263 else 264 mode = 0; 265 if (vp->v_type == VDIR) { 266 if (ap->a_mode & VWRITE) 267 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 268 NFSV3ACCESS_DELETE); 269 if (ap->a_mode & VEXEC) 270 mode |= NFSV3ACCESS_LOOKUP; 271 } else { 272 if (ap->a_mode & VWRITE) 273 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 274 if (ap->a_mode & VEXEC) 275 mode |= NFSV3ACCESS_EXECUTE; 276 } 277 *tl = txdr_unsigned(mode); 278 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 279 nfsm_postop_attr(vp, attrflag); 280 if (!error) { 281 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 282 rmode = fxdr_unsigned(u_int32_t, *tl); 283 /* 284 * The NFS V3 spec does not clarify whether or not 285 * the returned access bits can be a superset of 286 * the ones requested, so... 287 */ 288 if ((rmode & mode) != mode) 289 error = EACCES; 290 } 291 nfsm_reqdone; 292 return (error); 293 } else 294 return (nfsspec_access(ap)); 295 } 296 297 /* 298 * nfs open vnode op 299 * Check to see if the type is ok 300 * and that deletion is not in progress. 301 * For paged in text files, you will need to flush the page cache 302 * if consistency is lost. 303 */ 304 /* ARGSUSED */ 305 int 306 nfs_open(v) 307 void *v; 308 { 309 struct vop_open_args /* { 310 struct vnode *a_vp; 311 int a_mode; 312 struct ucred *a_cred; 313 struct proc *a_p; 314 } */ *ap = v; 315 struct vnode *vp = ap->a_vp; 316 struct nfsnode *np = VTONFS(vp); 317 struct vattr vattr; 318 int error; 319 320 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 321 #ifdef DIAGNOSTIC 322 printf("open eacces vtyp=%d\n",vp->v_type); 323 #endif 324 return (EACCES); 325 } 326 327 /* 328 * Initialize read and write creds here, for swapfiles 329 * and other paths that don't set the creds themselves. 330 */ 331 332 if (ap->a_mode & FREAD) { 333 if (np->n_rcred) { 334 crfree(np->n_rcred); 335 } 336 np->n_rcred = ap->a_cred; 337 crhold(np->n_rcred); 338 } 339 if (ap->a_mode & FWRITE) { 340 if (np->n_wcred) { 341 crfree(np->n_wcred); 342 } 343 np->n_wcred = ap->a_cred; 344 crhold(np->n_wcred); 345 } 346 347 if (np->n_flag & NMODIFIED) { 348 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 349 ap->a_p, 1)) == EINTR) 350 return (error); 351 uvm_vnp_uncache(vp); 352 np->n_attrstamp = 0; 353 if (vp->v_type == VDIR) 354 np->n_direofoffset = 0; 355 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 356 if (error) 357 return (error); 358 np->n_mtime = vattr.va_mtime.tv_sec; 359 } else { 360 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 361 if (error) 362 return (error); 363 if (np->n_mtime != vattr.va_mtime.tv_sec) { 364 if (vp->v_type == VDIR) 365 np->n_direofoffset = 0; 366 if ((error = nfs_vinvalbuf(vp, V_SAVE, 367 ap->a_cred, ap->a_p, 1)) == EINTR) 368 return (error); 369 uvm_vnp_uncache(vp); 370 np->n_mtime = vattr.va_mtime.tv_sec; 371 } 372 } 373 np->n_attrstamp = 0; /* For Open/Close consistency */ 374 return (0); 375 } 376 377 /* 378 * nfs close vnode op 379 * What an NFS client should do upon close after writing is a debatable issue. 380 * Most NFS clients push delayed writes to the server upon close, basically for 381 * two reasons: 382 * 1 - So that any write errors may be reported back to the client process 383 * doing the close system call. By far the two most likely errors are 384 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 385 * 2 - To put a worst case upper bound on cache inconsistency between 386 * multiple clients for the file. 387 * There is also a consistency problem for Version 2 of the protocol w.r.t. 388 * not being able to tell if other clients are writing a file concurrently, 389 * since there is no way of knowing if the changed modify time in the reply 390 * is only due to the write for this client. 391 * (NFS Version 3 provides weak cache consistency data in the reply that 392 * should be sufficient to detect and handle this case.) 393 * 394 * The current code does the following: 395 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 396 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 397 * or commit them (this satisfies 1 and 2 except for the 398 * case where the server crashes after this close but 399 * before the commit RPC, which is felt to be "good 400 * enough". Changing the last argument to nfs_flush() to 401 * a 1 would force a commit operation, if it is felt a 402 * commit is necessary now. 403 */ 404 /* ARGSUSED */ 405 int 406 nfs_close(v) 407 void *v; 408 { 409 struct vop_close_args /* { 410 struct vnodeop_desc *a_desc; 411 struct vnode *a_vp; 412 int a_fflag; 413 struct ucred *a_cred; 414 struct proc *a_p; 415 } */ *ap = v; 416 struct vnode *vp = ap->a_vp; 417 struct nfsnode *np = VTONFS(vp); 418 int error = 0; 419 420 if (vp->v_type == VREG) { 421 if (np->n_flag & NMODIFIED) { 422 if (NFS_ISV3(vp)) { 423 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 424 np->n_flag &= ~NMODIFIED; 425 } else 426 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 427 np->n_attrstamp = 0; 428 } 429 if (np->n_flag & NWRITEERR) { 430 np->n_flag &= ~NWRITEERR; 431 error = np->n_error; 432 } 433 } 434 return (error); 435 } 436 437 /* 438 * nfs getattr call from vfs. 439 */ 440 int 441 nfs_getattr(v) 442 void *v; 443 { 444 struct vop_getattr_args /* { 445 struct vnode *a_vp; 446 struct vattr *a_vap; 447 struct ucred *a_cred; 448 struct proc *a_p; 449 } */ *ap = v; 450 struct vnode *vp = ap->a_vp; 451 struct nfsnode *np = VTONFS(vp); 452 caddr_t cp; 453 u_int32_t *tl; 454 int32_t t1, t2; 455 caddr_t bpos, dpos; 456 int error = 0; 457 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 458 int v3 = NFS_ISV3(vp); 459 460 /* 461 * Update local times for special files. 462 */ 463 if (np->n_flag & (NACC | NUPD)) 464 np->n_flag |= NCHG; 465 /* 466 * First look in the cache. 467 */ 468 if (nfs_getattrcache(vp, ap->a_vap) == 0) 469 return (0); 470 nfsstats.rpccnt[NFSPROC_GETATTR]++; 471 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 472 nfsm_fhtom(vp, v3); 473 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 474 if (!error) 475 nfsm_loadattr(vp, ap->a_vap); 476 nfsm_reqdone; 477 return (error); 478 } 479 480 /* 481 * nfs setattr call. 482 */ 483 int 484 nfs_setattr(v) 485 void *v; 486 { 487 struct vop_setattr_args /* { 488 struct vnodeop_desc *a_desc; 489 struct vnode *a_vp; 490 struct vattr *a_vap; 491 struct ucred *a_cred; 492 struct proc *a_p; 493 } */ *ap = v; 494 struct vnode *vp = ap->a_vp; 495 struct nfsnode *np = VTONFS(vp); 496 struct vattr *vap = ap->a_vap; 497 int error = 0; 498 u_quad_t tsize = 0; 499 500 /* 501 * Setting of flags is not supported. 502 */ 503 if (vap->va_flags != VNOVAL) 504 return (EOPNOTSUPP); 505 506 /* 507 * Disallow write attempts if the filesystem is mounted read-only. 508 */ 509 if ((vap->va_uid != (uid_t)VNOVAL || 510 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 511 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 512 (vp->v_mount->mnt_flag & MNT_RDONLY)) 513 return (EROFS); 514 if (vap->va_size != VNOVAL) { 515 switch (vp->v_type) { 516 case VDIR: 517 return (EISDIR); 518 case VCHR: 519 case VBLK: 520 case VSOCK: 521 case VFIFO: 522 if (vap->va_mtime.tv_sec == VNOVAL && 523 vap->va_atime.tv_sec == VNOVAL && 524 vap->va_mode == (mode_t)VNOVAL && 525 vap->va_uid == (uid_t)VNOVAL && 526 vap->va_gid == (gid_t)VNOVAL) 527 return (0); 528 vap->va_size = VNOVAL; 529 break; 530 default: 531 /* 532 * Disallow write attempts if the filesystem is 533 * mounted read-only. 534 */ 535 if (vp->v_mount->mnt_flag & MNT_RDONLY) 536 return (EROFS); 537 if (vap->va_size == 0) 538 error = nfs_vinvalbuf(vp, 0, 539 ap->a_cred, ap->a_p, 1); 540 else 541 error = nfs_vinvalbuf(vp, V_SAVE, 542 ap->a_cred, ap->a_p, 1); 543 if (error) 544 return (error); 545 tsize = np->n_size; 546 np->n_size = np->n_vattr.va_size = vap->va_size; 547 uvm_vnp_setsize(vp, np->n_size); 548 }; 549 } else if ((vap->va_mtime.tv_sec != VNOVAL || 550 vap->va_atime.tv_sec != VNOVAL) && 551 vp->v_type == VREG && 552 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 553 ap->a_p, 1)) == EINTR) 554 return (error); 555 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 556 if (error && vap->va_size != VNOVAL) { 557 np->n_size = np->n_vattr.va_size = tsize; 558 uvm_vnp_setsize(vp, np->n_size); 559 } 560 return (error); 561 } 562 563 /* 564 * Do an nfs setattr rpc. 565 */ 566 int 567 nfs_setattrrpc(vp, vap, cred, procp) 568 struct vnode *vp; 569 struct vattr *vap; 570 struct ucred *cred; 571 struct proc *procp; 572 { 573 struct nfsv2_sattr *sp; 574 caddr_t cp; 575 int32_t t1, t2; 576 caddr_t bpos, dpos, cp2; 577 u_int32_t *tl; 578 int error = 0, wccflag = NFSV3_WCCRATTR; 579 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 580 int v3 = NFS_ISV3(vp); 581 582 nfsstats.rpccnt[NFSPROC_SETATTR]++; 583 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 584 nfsm_fhtom(vp, v3); 585 if (v3) { 586 nfsm_v3attrbuild(vap, TRUE); 587 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 588 *tl = nfs_false; 589 } else { 590 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 591 if (vap->va_mode == (mode_t)VNOVAL) 592 sp->sa_mode = nfs_xdrneg1; 593 else 594 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 595 if (vap->va_uid == (uid_t)VNOVAL) 596 sp->sa_uid = nfs_xdrneg1; 597 else 598 sp->sa_uid = txdr_unsigned(vap->va_uid); 599 if (vap->va_gid == (gid_t)VNOVAL) 600 sp->sa_gid = nfs_xdrneg1; 601 else 602 sp->sa_gid = txdr_unsigned(vap->va_gid); 603 sp->sa_size = txdr_unsigned(vap->va_size); 604 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 605 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 606 } 607 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 608 if (v3) { 609 nfsm_wcc_data(vp, wccflag); 610 } else 611 nfsm_loadattr(vp, (struct vattr *)0); 612 nfsm_reqdone; 613 return (error); 614 } 615 616 /* 617 * nfs lookup call, one step at a time... 618 * First look in cache 619 * If not found, unlock the directory nfsnode and do the rpc 620 */ 621 int 622 nfs_lookup(v) 623 void *v; 624 { 625 struct vop_lookup_args /* { 626 struct vnodeop_desc *a_desc; 627 struct vnode *a_dvp; 628 struct vnode **a_vpp; 629 struct componentname *a_cnp; 630 } */ *ap = v; 631 struct componentname *cnp = ap->a_cnp; 632 struct vnode *dvp = ap->a_dvp; 633 struct vnode **vpp = ap->a_vpp; 634 struct proc *p = cnp->cn_proc; 635 int flags; 636 struct vnode *newvp; 637 u_int32_t *tl; 638 caddr_t cp; 639 int32_t t1, t2; 640 struct nfsmount *nmp; 641 caddr_t bpos, dpos, cp2; 642 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 643 long len; 644 nfsfh_t *fhp; 645 struct nfsnode *np; 646 int lockparent, wantparent, error = 0, attrflag, fhsize; 647 int v3 = NFS_ISV3(dvp); 648 649 cnp->cn_flags &= ~PDIRUNLOCK; 650 flags = cnp->cn_flags; 651 652 *vpp = NULLVP; 653 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 654 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 655 return (EROFS); 656 if (dvp->v_type != VDIR) 657 return (ENOTDIR); 658 lockparent = flags & LOCKPARENT; 659 wantparent = flags & (LOCKPARENT|WANTPARENT); 660 nmp = VFSTONFS(dvp->v_mount); 661 np = VTONFS(dvp); 662 663 /* 664 * Before tediously performing a linear scan of the directory, 665 * check the name cache to see if the directory/name pair 666 * we are looking for is known already. 667 * If the directory/name pair is found in the name cache, 668 * we have to ensure the directory has not changed from 669 * the time the cache entry has been created. If it has, 670 * the cache entry has to be ignored. 671 */ 672 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 673 struct vattr vattr; 674 int err2; 675 676 if (error && error != ENOENT) { 677 *vpp = NULLVP; 678 return (error); 679 } 680 681 if (cnp->cn_flags & PDIRUNLOCK) { 682 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p); 683 if (err2 != 0) { 684 *vpp = NULLVP; 685 return (err2); 686 } 687 cnp->cn_flags &= ~PDIRUNLOCK; 688 } 689 690 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 691 if (err2 != 0) { 692 if (error == 0) { 693 if (*vpp != dvp) 694 vput(*vpp); 695 else 696 vrele(*vpp); 697 } 698 *vpp = NULLVP; 699 return (err2); 700 } 701 702 if (error == ENOENT) { 703 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 704 cnp->cn_proc) && vattr.va_mtime.tv_sec == 705 VTONFS(dvp)->n_ctime) 706 return (ENOENT); 707 cache_purge(dvp); 708 np->n_ctime = 0; 709 goto dorpc; 710 } 711 712 newvp = *vpp; 713 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 714 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 715 { 716 nfsstats.lookupcache_hits++; 717 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 718 cnp->cn_flags |= SAVENAME; 719 if ((!lockparent || !(flags & ISLASTCN)) && 720 newvp != dvp) 721 VOP_UNLOCK(dvp, 0, p); 722 return (0); 723 } 724 cache_purge(newvp); 725 if (newvp != dvp) 726 vput(newvp); 727 else 728 vrele(newvp); 729 *vpp = NULLVP; 730 } 731 dorpc: 732 error = 0; 733 newvp = NULLVP; 734 nfsstats.lookupcache_misses++; 735 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 736 len = cnp->cn_namelen; 737 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 738 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 739 nfsm_fhtom(dvp, v3); 740 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 741 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 742 if (error) { 743 nfsm_postop_attr(dvp, attrflag); 744 m_freem(mrep); 745 goto nfsmout; 746 } 747 nfsm_getfh(fhp, fhsize, v3); 748 749 /* 750 * Handle RENAME case... 751 */ 752 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 753 if (NFS_CMPFH(np, fhp, fhsize)) { 754 m_freem(mrep); 755 return (EISDIR); 756 } 757 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 758 if (error) { 759 m_freem(mrep); 760 return (error); 761 } 762 newvp = NFSTOV(np); 763 if (v3) { 764 nfsm_postop_attr(newvp, attrflag); 765 nfsm_postop_attr(dvp, attrflag); 766 } else 767 nfsm_loadattr(newvp, (struct vattr *)0); 768 *vpp = newvp; 769 m_freem(mrep); 770 cnp->cn_flags |= SAVENAME; 771 if (!lockparent) { 772 VOP_UNLOCK(dvp, 0, p); 773 cnp->cn_flags |= PDIRUNLOCK; 774 } 775 return (0); 776 } 777 778 /* 779 * The postop attr handling is duplicated for each if case, 780 * because it should be done while dvp is locked (unlocking 781 * dvp is different for each case). 782 */ 783 784 if (NFS_CMPFH(np, fhp, fhsize)) { 785 VREF(dvp); 786 newvp = dvp; 787 if (v3) { 788 nfsm_postop_attr(newvp, attrflag); 789 nfsm_postop_attr(dvp, attrflag); 790 } else 791 nfsm_loadattr(newvp, (struct vattr *)0); 792 } else if (flags & ISDOTDOT) { 793 VOP_UNLOCK(dvp, 0, p); 794 cnp->cn_flags |= PDIRUNLOCK; 795 796 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 797 if (error) { 798 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p) == 0) 799 cnp->cn_flags &= ~PDIRUNLOCK; 800 m_freem(mrep); 801 return (error); 802 } 803 newvp = NFSTOV(np); 804 805 if (v3) { 806 nfsm_postop_attr(newvp, attrflag); 807 nfsm_postop_attr(dvp, attrflag); 808 } else 809 nfsm_loadattr(newvp, (struct vattr *)0); 810 811 if (lockparent && (flags & ISLASTCN)) { 812 if ((error = vn_lock(dvp, LK_EXCLUSIVE, p))) { 813 m_freem(mrep); 814 vput(newvp); 815 return error; 816 } 817 cnp->cn_flags &= ~PDIRUNLOCK; 818 } 819 820 } else { 821 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 822 if (error) { 823 m_freem(mrep); 824 return error; 825 } 826 newvp = NFSTOV(np); 827 if (v3) { 828 nfsm_postop_attr(newvp, attrflag); 829 nfsm_postop_attr(dvp, attrflag); 830 } else 831 nfsm_loadattr(newvp, (struct vattr *)0); 832 if (!lockparent || !(flags & ISLASTCN)) { 833 VOP_UNLOCK(dvp, 0, p); 834 cnp->cn_flags |= PDIRUNLOCK; 835 } 836 } 837 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 838 cnp->cn_flags |= SAVENAME; 839 if ((cnp->cn_flags & MAKEENTRY) && 840 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 841 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 842 cache_enter(dvp, newvp, cnp); 843 } 844 *vpp = newvp; 845 nfsm_reqdone; 846 if (error) { 847 /* 848 * We get here only because of errors returned by 849 * the RPC. Otherwise we'll have returned above 850 * (the nfsm_* macros will jump to nfsm_reqdone 851 * on error). 852 */ 853 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 854 cnp->cn_nameiop != CREATE) { 855 if (VTONFS(dvp)->n_ctime == 0) 856 VTONFS(dvp)->n_ctime = 857 VTONFS(dvp)->n_vattr.va_mtime.tv_sec; 858 cache_enter(dvp, NULL, cnp); 859 } 860 if (newvp != NULLVP) { 861 vrele(newvp); 862 if (newvp != dvp) 863 VOP_UNLOCK(newvp, 0, p); 864 } 865 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 866 (flags & ISLASTCN) && error == ENOENT) { 867 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 868 error = EROFS; 869 else 870 error = EJUSTRETURN; 871 } 872 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 873 cnp->cn_flags |= SAVENAME; 874 *vpp = NULL; 875 } 876 return (error); 877 } 878 879 /* 880 * nfs read call. 881 * Just call nfs_bioread() to do the work. 882 */ 883 int 884 nfs_read(v) 885 void *v; 886 { 887 struct vop_read_args /* { 888 struct vnode *a_vp; 889 struct uio *a_uio; 890 int a_ioflag; 891 struct ucred *a_cred; 892 } */ *ap = v; 893 struct vnode *vp = ap->a_vp; 894 895 if (vp->v_type != VREG) 896 return (EPERM); 897 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 898 } 899 900 /* 901 * nfs readlink call 902 */ 903 int 904 nfs_readlink(v) 905 void *v; 906 { 907 struct vop_readlink_args /* { 908 struct vnode *a_vp; 909 struct uio *a_uio; 910 struct ucred *a_cred; 911 } */ *ap = v; 912 struct vnode *vp = ap->a_vp; 913 914 if (vp->v_type != VLNK) 915 return (EPERM); 916 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); 917 } 918 919 /* 920 * Do a readlink rpc. 921 * Called by nfs_doio() from below the buffer cache. 922 */ 923 int 924 nfs_readlinkrpc(vp, uiop, cred) 925 struct vnode *vp; 926 struct uio *uiop; 927 struct ucred *cred; 928 { 929 u_int32_t *tl; 930 caddr_t cp; 931 int32_t t1, t2; 932 caddr_t bpos, dpos, cp2; 933 int error = 0, len, attrflag; 934 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 935 int v3 = NFS_ISV3(vp); 936 937 nfsstats.rpccnt[NFSPROC_READLINK]++; 938 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 939 nfsm_fhtom(vp, v3); 940 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 941 if (v3) 942 nfsm_postop_attr(vp, attrflag); 943 if (!error) { 944 nfsm_strsiz(len, NFS_MAXPATHLEN); 945 nfsm_mtouio(uiop, len); 946 } 947 nfsm_reqdone; 948 return (error); 949 } 950 951 /* 952 * nfs read rpc call 953 * Ditto above 954 */ 955 int 956 nfs_readrpc(vp, uiop) 957 struct vnode *vp; 958 struct uio *uiop; 959 { 960 u_int32_t *tl; 961 caddr_t cp; 962 int32_t t1, t2; 963 caddr_t bpos, dpos, cp2; 964 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 965 struct nfsmount *nmp; 966 int error = 0, len, retlen, tsiz, eof, attrflag; 967 int v3 = NFS_ISV3(vp); 968 969 #ifndef nolint 970 eof = 0; 971 #endif 972 nmp = VFSTONFS(vp->v_mount); 973 tsiz = uiop->uio_resid; 974 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 975 return (EFBIG); 976 while (tsiz > 0) { 977 nfsstats.rpccnt[NFSPROC_READ]++; 978 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 979 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 980 nfsm_fhtom(vp, v3); 981 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 982 if (v3) { 983 txdr_hyper(uiop->uio_offset, tl); 984 *(tl + 2) = txdr_unsigned(len); 985 } else { 986 *tl++ = txdr_unsigned(uiop->uio_offset); 987 *tl++ = txdr_unsigned(len); 988 *tl = 0; 989 } 990 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 991 VTONFS(vp)->n_rcred); 992 if (v3) { 993 nfsm_postop_attr(vp, attrflag); 994 if (error) { 995 m_freem(mrep); 996 goto nfsmout; 997 } 998 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 999 eof = fxdr_unsigned(int, *(tl + 1)); 1000 } else 1001 nfsm_loadattr(vp, (struct vattr *)0); 1002 nfsm_strsiz(retlen, nmp->nm_rsize); 1003 nfsm_mtouio(uiop, retlen); 1004 m_freem(mrep); 1005 tsiz -= retlen; 1006 if (v3) { 1007 if (eof || retlen == 0) 1008 tsiz = 0; 1009 } else if (retlen < len) 1010 tsiz = 0; 1011 } 1012 nfsmout: 1013 return (error); 1014 } 1015 1016 /* 1017 * nfs write call 1018 */ 1019 int 1020 nfs_writerpc(vp, uiop, iomode, must_commit) 1021 struct vnode *vp; 1022 struct uio *uiop; 1023 int *iomode, *must_commit; 1024 { 1025 u_int32_t *tl; 1026 caddr_t cp; 1027 int32_t t1, t2, backup; 1028 caddr_t bpos, dpos, cp2; 1029 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1030 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1031 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1032 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1033 1034 #ifndef DIAGNOSTIC 1035 if (uiop->uio_iovcnt != 1) 1036 panic("nfs: writerpc iovcnt > 1"); 1037 #endif 1038 *must_commit = 0; 1039 tsiz = uiop->uio_resid; 1040 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 1041 return (EFBIG); 1042 while (tsiz > 0) { 1043 nfsstats.rpccnt[NFSPROC_WRITE]++; 1044 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1045 nfsm_reqhead(vp, NFSPROC_WRITE, 1046 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1047 nfsm_fhtom(vp, v3); 1048 if (v3) { 1049 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1050 txdr_hyper(uiop->uio_offset, tl); 1051 tl += 2; 1052 *tl++ = txdr_unsigned(len); 1053 *tl++ = txdr_unsigned(*iomode); 1054 *tl = txdr_unsigned(len); 1055 } else { 1056 u_int32_t x; 1057 1058 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1059 /* Set both "begin" and "current" to non-garbage. */ 1060 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1061 *tl++ = x; /* "begin offset" */ 1062 *tl++ = x; /* "current offset" */ 1063 x = txdr_unsigned(len); 1064 *tl++ = x; /* total to this offset */ 1065 *tl = x; /* size of this write */ 1066 1067 } 1068 nfsm_uiotom(uiop, len); 1069 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1070 VTONFS(vp)->n_wcred); 1071 if (v3) { 1072 wccflag = NFSV3_WCCCHK; 1073 nfsm_wcc_data(vp, wccflag); 1074 if (!error) { 1075 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1076 + NFSX_V3WRITEVERF); 1077 rlen = fxdr_unsigned(int, *tl++); 1078 if (rlen == 0) { 1079 error = NFSERR_IO; 1080 break; 1081 } else if (rlen < len) { 1082 backup = len - rlen; 1083 uiop->uio_iov->iov_base -= backup; 1084 uiop->uio_iov->iov_len += backup; 1085 uiop->uio_offset -= backup; 1086 uiop->uio_resid += backup; 1087 len = rlen; 1088 } 1089 commit = fxdr_unsigned(int, *tl++); 1090 1091 /* 1092 * Return the lowest committment level 1093 * obtained by any of the RPCs. 1094 */ 1095 if (committed == NFSV3WRITE_FILESYNC) 1096 committed = commit; 1097 else if (committed == NFSV3WRITE_DATASYNC && 1098 commit == NFSV3WRITE_UNSTABLE) 1099 committed = commit; 1100 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) { 1101 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1102 NFSX_V3WRITEVERF); 1103 nmp->nm_flag |= NFSMNT_HASWRITEVERF; 1104 } else if (bcmp((caddr_t)tl, 1105 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1106 *must_commit = 1; 1107 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1108 NFSX_V3WRITEVERF); 1109 } 1110 } 1111 } else 1112 nfsm_loadattr(vp, (struct vattr *)0); 1113 if (wccflag) 1114 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec; 1115 m_freem(mrep); 1116 tsiz -= len; 1117 } 1118 nfsmout: 1119 *iomode = committed; 1120 if (error) 1121 uiop->uio_resid = tsiz; 1122 return (error); 1123 } 1124 1125 /* 1126 * nfs mknod rpc 1127 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1128 * mode set to specify the file type and the size field for rdev. 1129 */ 1130 int 1131 nfs_mknodrpc(dvp, vpp, cnp, vap) 1132 struct vnode *dvp; 1133 struct vnode **vpp; 1134 struct componentname *cnp; 1135 struct vattr *vap; 1136 { 1137 struct nfsv2_sattr *sp; 1138 u_int32_t *tl; 1139 caddr_t cp; 1140 int32_t t1, t2; 1141 struct vnode *newvp = (struct vnode *)0; 1142 struct nfsnode *np; 1143 char *cp2; 1144 caddr_t bpos, dpos; 1145 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1146 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1147 u_int32_t rdev; 1148 int v3 = NFS_ISV3(dvp); 1149 1150 if (vap->va_type == VCHR || vap->va_type == VBLK) 1151 rdev = txdr_unsigned(vap->va_rdev); 1152 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1153 rdev = nfs_xdrneg1; 1154 else { 1155 VOP_ABORTOP(dvp, cnp); 1156 vput(dvp); 1157 return (EOPNOTSUPP); 1158 } 1159 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1160 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1161 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1162 nfsm_fhtom(dvp, v3); 1163 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1164 if (v3) { 1165 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1166 *tl++ = vtonfsv3_type(vap->va_type); 1167 nfsm_v3attrbuild(vap, FALSE); 1168 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1169 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1170 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1171 *tl = txdr_unsigned(minor(vap->va_rdev)); 1172 } 1173 } else { 1174 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1175 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1176 sp->sa_uid = nfs_xdrneg1; 1177 sp->sa_gid = nfs_xdrneg1; 1178 sp->sa_size = rdev; 1179 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1180 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1181 } 1182 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1183 if (!error) { 1184 nfsm_mtofh(dvp, newvp, v3, gotvp); 1185 if (!gotvp) { 1186 if (newvp) { 1187 vrele(newvp); 1188 newvp = (struct vnode *)0; 1189 } 1190 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1191 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1192 if (!error) 1193 newvp = NFSTOV(np); 1194 } 1195 } 1196 if (v3) 1197 nfsm_wcc_data(dvp, wccflag); 1198 nfsm_reqdone; 1199 if (error) { 1200 if (newvp) 1201 vrele(newvp); 1202 } else { 1203 if (cnp->cn_flags & MAKEENTRY) 1204 cache_enter(dvp, newvp, cnp); 1205 *vpp = newvp; 1206 } 1207 FREE(cnp->cn_pnbuf, M_NAMEI); 1208 VTONFS(dvp)->n_flag |= NMODIFIED; 1209 if (!wccflag) 1210 VTONFS(dvp)->n_attrstamp = 0; 1211 vrele(dvp); 1212 return (error); 1213 } 1214 1215 /* 1216 * nfs mknod vop 1217 * just call nfs_mknodrpc() to do the work. 1218 */ 1219 /* ARGSUSED */ 1220 int 1221 nfs_mknod(v) 1222 void *v; 1223 { 1224 struct vop_mknod_args /* { 1225 struct vnode *a_dvp; 1226 struct vnode **a_vpp; 1227 struct componentname *a_cnp; 1228 struct vattr *a_vap; 1229 } */ *ap = v; 1230 struct vnode *newvp; 1231 int error; 1232 1233 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1234 if (!error) 1235 vrele(newvp); 1236 return (error); 1237 } 1238 1239 static u_long create_verf; 1240 /* 1241 * nfs file create call 1242 */ 1243 int 1244 nfs_create(v) 1245 void *v; 1246 { 1247 struct vop_create_args /* { 1248 struct vnode *a_dvp; 1249 struct vnode **a_vpp; 1250 struct componentname *a_cnp; 1251 struct vattr *a_vap; 1252 } */ *ap = v; 1253 struct vnode *dvp = ap->a_dvp; 1254 struct vattr *vap = ap->a_vap; 1255 struct componentname *cnp = ap->a_cnp; 1256 struct nfsv2_sattr *sp; 1257 u_int32_t *tl; 1258 caddr_t cp; 1259 int32_t t1, t2; 1260 struct nfsnode *np = (struct nfsnode *)0; 1261 struct vnode *newvp = (struct vnode *)0; 1262 caddr_t bpos, dpos, cp2; 1263 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1264 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1265 int v3 = NFS_ISV3(dvp); 1266 1267 /* 1268 * Oops, not for me.. 1269 */ 1270 if (vap->va_type == VSOCK) 1271 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1272 1273 #ifdef VA_EXCLUSIVE 1274 if (vap->va_vaflags & VA_EXCLUSIVE) 1275 fmode |= O_EXCL; 1276 #endif 1277 again: 1278 nfsstats.rpccnt[NFSPROC_CREATE]++; 1279 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1280 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1281 nfsm_fhtom(dvp, v3); 1282 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1283 if (v3) { 1284 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1285 if (fmode & O_EXCL) { 1286 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1287 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1288 if (TAILQ_FIRST(&in_ifaddr)) 1289 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1290 else 1291 *tl++ = create_verf; 1292 *tl = ++create_verf; 1293 } else { 1294 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1295 nfsm_v3attrbuild(vap, FALSE); 1296 } 1297 } else { 1298 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1299 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1300 sp->sa_uid = nfs_xdrneg1; 1301 sp->sa_gid = nfs_xdrneg1; 1302 sp->sa_size = 0; 1303 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1304 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1305 } 1306 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1307 if (!error) { 1308 nfsm_mtofh(dvp, newvp, v3, gotvp); 1309 if (!gotvp) { 1310 if (newvp) { 1311 vrele(newvp); 1312 newvp = (struct vnode *)0; 1313 } 1314 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1315 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1316 if (!error) 1317 newvp = NFSTOV(np); 1318 } 1319 } 1320 if (v3) 1321 nfsm_wcc_data(dvp, wccflag); 1322 nfsm_reqdone; 1323 if (error) { 1324 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1325 fmode &= ~O_EXCL; 1326 goto again; 1327 } 1328 if (newvp) 1329 vrele(newvp); 1330 } else if (v3 && (fmode & O_EXCL)) 1331 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1332 if (!error) { 1333 if (cnp->cn_flags & MAKEENTRY) 1334 cache_enter(dvp, newvp, cnp); 1335 *ap->a_vpp = newvp; 1336 } 1337 FREE(cnp->cn_pnbuf, M_NAMEI); 1338 VTONFS(dvp)->n_flag |= NMODIFIED; 1339 if (!wccflag) 1340 VTONFS(dvp)->n_attrstamp = 0; 1341 vrele(dvp); 1342 return (error); 1343 } 1344 1345 /* 1346 * nfs file remove call 1347 * To try and make nfs semantics closer to ufs semantics, a file that has 1348 * other processes using the vnode is renamed instead of removed and then 1349 * removed later on the last close. 1350 * - If v_usecount > 1 1351 * If a rename is not already in the works 1352 * call nfs_sillyrename() to set it up 1353 * else 1354 * do the remove rpc 1355 */ 1356 int 1357 nfs_remove(v) 1358 void *v; 1359 { 1360 struct vop_remove_args /* { 1361 struct vnodeop_desc *a_desc; 1362 struct vnode * a_dvp; 1363 struct vnode * a_vp; 1364 struct componentname * a_cnp; 1365 } */ *ap = v; 1366 struct vnode *vp = ap->a_vp; 1367 struct vnode *dvp = ap->a_dvp; 1368 struct componentname *cnp = ap->a_cnp; 1369 struct nfsnode *np = VTONFS(vp); 1370 int error = 0; 1371 struct vattr vattr; 1372 1373 #ifndef DIAGNOSTIC 1374 if ((cnp->cn_flags & HASBUF) == 0) 1375 panic("nfs_remove: no name"); 1376 if (vp->v_usecount < 1) 1377 panic("nfs_remove: bad v_usecount"); 1378 #endif 1379 if (vp->v_type == VDIR) 1380 error = EPERM; 1381 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1382 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1383 vattr.va_nlink > 1)) { 1384 /* 1385 * Purge the name cache so that the chance of a lookup for 1386 * the name succeeding while the remove is in progress is 1387 * minimized. Without node locking it can still happen, such 1388 * that an I/O op returns ESTALE, but since you get this if 1389 * another host removes the file.. 1390 */ 1391 cache_purge(vp); 1392 /* 1393 * throw away biocache buffers, mainly to avoid 1394 * unnecessary delayed writes later. 1395 */ 1396 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1397 /* Do the rpc */ 1398 if (error != EINTR) 1399 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1400 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1401 /* 1402 * Kludge City: If the first reply to the remove rpc is lost.. 1403 * the reply to the retransmitted request will be ENOENT 1404 * since the file was in fact removed 1405 * Therefore, we cheat and return success. 1406 */ 1407 if (error == ENOENT) 1408 error = 0; 1409 } else if (!np->n_sillyrename) 1410 error = nfs_sillyrename(dvp, vp, cnp); 1411 FREE(cnp->cn_pnbuf, M_NAMEI); 1412 np->n_attrstamp = 0; 1413 vrele(dvp); 1414 vrele(vp); 1415 return (error); 1416 } 1417 1418 /* 1419 * nfs file remove rpc called from nfs_inactive 1420 */ 1421 int 1422 nfs_removeit(sp) 1423 struct sillyrename *sp; 1424 { 1425 1426 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1427 (struct proc *)0)); 1428 } 1429 1430 /* 1431 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1432 */ 1433 int 1434 nfs_removerpc(dvp, name, namelen, cred, proc) 1435 struct vnode *dvp; 1436 char *name; 1437 int namelen; 1438 struct ucred *cred; 1439 struct proc *proc; 1440 { 1441 u_int32_t *tl; 1442 caddr_t cp; 1443 int32_t t1, t2; 1444 caddr_t bpos, dpos, cp2; 1445 int error = 0, wccflag = NFSV3_WCCRATTR; 1446 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1447 int v3 = NFS_ISV3(dvp); 1448 1449 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1450 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1451 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1452 nfsm_fhtom(dvp, v3); 1453 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1454 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1455 if (v3) 1456 nfsm_wcc_data(dvp, wccflag); 1457 nfsm_reqdone; 1458 VTONFS(dvp)->n_flag |= NMODIFIED; 1459 if (!wccflag) 1460 VTONFS(dvp)->n_attrstamp = 0; 1461 return (error); 1462 } 1463 1464 /* 1465 * nfs file rename call 1466 */ 1467 int 1468 nfs_rename(v) 1469 void *v; 1470 { 1471 struct vop_rename_args /* { 1472 struct vnode *a_fdvp; 1473 struct vnode *a_fvp; 1474 struct componentname *a_fcnp; 1475 struct vnode *a_tdvp; 1476 struct vnode *a_tvp; 1477 struct componentname *a_tcnp; 1478 } */ *ap = v; 1479 struct vnode *fvp = ap->a_fvp; 1480 struct vnode *tvp = ap->a_tvp; 1481 struct vnode *fdvp = ap->a_fdvp; 1482 struct vnode *tdvp = ap->a_tdvp; 1483 struct componentname *tcnp = ap->a_tcnp; 1484 struct componentname *fcnp = ap->a_fcnp; 1485 int error; 1486 1487 #ifndef DIAGNOSTIC 1488 if ((tcnp->cn_flags & HASBUF) == 0 || 1489 (fcnp->cn_flags & HASBUF) == 0) 1490 panic("nfs_rename: no name"); 1491 #endif 1492 /* Check for cross-device rename */ 1493 if ((fvp->v_mount != tdvp->v_mount) || 1494 (tvp && (fvp->v_mount != tvp->v_mount))) { 1495 error = EXDEV; 1496 goto out; 1497 } 1498 1499 /* 1500 * If the tvp exists and is in use, sillyrename it before doing the 1501 * rename of the new file over it. 1502 */ 1503 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1504 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1505 vrele(tvp); 1506 tvp = NULL; 1507 } 1508 1509 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1510 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1511 tcnp->cn_proc); 1512 1513 if (fvp->v_type == VDIR) { 1514 if (tvp != NULL && tvp->v_type == VDIR) 1515 cache_purge(tdvp); 1516 cache_purge(fdvp); 1517 } 1518 out: 1519 if (tdvp == tvp) 1520 vrele(tdvp); 1521 else 1522 vput(tdvp); 1523 if (tvp) 1524 vput(tvp); 1525 vrele(fdvp); 1526 vrele(fvp); 1527 /* 1528 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1529 */ 1530 if (error == ENOENT) 1531 error = 0; 1532 return (error); 1533 } 1534 1535 /* 1536 * nfs file rename rpc called from nfs_remove() above 1537 */ 1538 int 1539 nfs_renameit(sdvp, scnp, sp) 1540 struct vnode *sdvp; 1541 struct componentname *scnp; 1542 struct sillyrename *sp; 1543 { 1544 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1545 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1546 } 1547 1548 /* 1549 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1550 */ 1551 int 1552 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1553 struct vnode *fdvp; 1554 char *fnameptr; 1555 int fnamelen; 1556 struct vnode *tdvp; 1557 char *tnameptr; 1558 int tnamelen; 1559 struct ucred *cred; 1560 struct proc *proc; 1561 { 1562 u_int32_t *tl; 1563 caddr_t cp; 1564 int32_t t1, t2; 1565 caddr_t bpos, dpos, cp2; 1566 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1567 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1568 int v3 = NFS_ISV3(fdvp); 1569 1570 nfsstats.rpccnt[NFSPROC_RENAME]++; 1571 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1572 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1573 nfsm_rndup(tnamelen)); 1574 nfsm_fhtom(fdvp, v3); 1575 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1576 nfsm_fhtom(tdvp, v3); 1577 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1578 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1579 if (v3) { 1580 nfsm_wcc_data(fdvp, fwccflag); 1581 nfsm_wcc_data(tdvp, twccflag); 1582 } 1583 nfsm_reqdone; 1584 VTONFS(fdvp)->n_flag |= NMODIFIED; 1585 VTONFS(tdvp)->n_flag |= NMODIFIED; 1586 if (!fwccflag) 1587 VTONFS(fdvp)->n_attrstamp = 0; 1588 if (!twccflag) 1589 VTONFS(tdvp)->n_attrstamp = 0; 1590 return (error); 1591 } 1592 1593 /* 1594 * nfs hard link create call 1595 */ 1596 int 1597 nfs_link(v) 1598 void *v; 1599 { 1600 struct vop_link_args /* { 1601 struct vnode *a_dvp; 1602 struct vnode *a_vp; 1603 struct componentname *a_cnp; 1604 } */ *ap = v; 1605 struct vnode *vp = ap->a_vp; 1606 struct vnode *dvp = ap->a_dvp; 1607 struct componentname *cnp = ap->a_cnp; 1608 u_int32_t *tl; 1609 caddr_t cp; 1610 int32_t t1, t2; 1611 caddr_t bpos, dpos, cp2; 1612 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1613 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1614 int v3 = NFS_ISV3(vp); 1615 1616 1617 if (dvp->v_mount != vp->v_mount) { 1618 FREE(cnp->cn_pnbuf, M_NAMEI); 1619 if (vp == dvp) 1620 vrele(dvp); 1621 else 1622 vput(dvp); 1623 return (EXDEV); 1624 } 1625 1626 /* 1627 * Push all writes to the server, so that the attribute cache 1628 * doesn't get "out of sync" with the server. 1629 * XXX There should be a better way! 1630 */ 1631 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc); 1632 1633 nfsstats.rpccnt[NFSPROC_LINK]++; 1634 nfsm_reqhead(vp, NFSPROC_LINK, 1635 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1636 nfsm_fhtom(vp, v3); 1637 nfsm_fhtom(dvp, v3); 1638 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1639 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1640 if (v3) { 1641 nfsm_postop_attr(vp, attrflag); 1642 nfsm_wcc_data(dvp, wccflag); 1643 } 1644 nfsm_reqdone; 1645 FREE(cnp->cn_pnbuf, M_NAMEI); 1646 VTONFS(dvp)->n_flag |= NMODIFIED; 1647 if (!attrflag) 1648 VTONFS(vp)->n_attrstamp = 0; 1649 if (!wccflag) 1650 VTONFS(dvp)->n_attrstamp = 0; 1651 vput(dvp); 1652 /* 1653 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1654 */ 1655 if (error == EEXIST) 1656 error = 0; 1657 return (error); 1658 } 1659 1660 /* 1661 * nfs symbolic link create call 1662 */ 1663 int 1664 nfs_symlink(v) 1665 void *v; 1666 { 1667 struct vop_symlink_args /* { 1668 struct vnode *a_dvp; 1669 struct vnode **a_vpp; 1670 struct componentname *a_cnp; 1671 struct vattr *a_vap; 1672 char *a_target; 1673 } */ *ap = v; 1674 struct vnode *dvp = ap->a_dvp; 1675 struct vattr *vap = ap->a_vap; 1676 struct componentname *cnp = ap->a_cnp; 1677 struct nfsv2_sattr *sp; 1678 u_int32_t *tl; 1679 caddr_t cp; 1680 int32_t t1, t2; 1681 caddr_t bpos, dpos, cp2; 1682 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1683 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1684 struct vnode *newvp = (struct vnode *)0; 1685 int v3 = NFS_ISV3(dvp); 1686 1687 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1688 slen = strlen(ap->a_target); 1689 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1690 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1691 nfsm_fhtom(dvp, v3); 1692 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1693 if (v3) 1694 nfsm_v3attrbuild(vap, FALSE); 1695 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1696 if (!v3) { 1697 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1698 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1699 sp->sa_uid = nfs_xdrneg1; 1700 sp->sa_gid = nfs_xdrneg1; 1701 sp->sa_size = nfs_xdrneg1; 1702 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1703 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1704 } 1705 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1706 if (v3) { 1707 if (!error) 1708 nfsm_mtofh(dvp, newvp, v3, gotvp); 1709 nfsm_wcc_data(dvp, wccflag); 1710 } 1711 nfsm_reqdone; 1712 if (newvp) 1713 vrele(newvp); 1714 FREE(cnp->cn_pnbuf, M_NAMEI); 1715 VTONFS(dvp)->n_flag |= NMODIFIED; 1716 if (!wccflag) 1717 VTONFS(dvp)->n_attrstamp = 0; 1718 vrele(dvp); 1719 /* 1720 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1721 */ 1722 if (error == EEXIST) 1723 error = 0; 1724 return (error); 1725 } 1726 1727 /* 1728 * nfs make dir call 1729 */ 1730 int 1731 nfs_mkdir(v) 1732 void *v; 1733 { 1734 struct vop_mkdir_args /* { 1735 struct vnode *a_dvp; 1736 struct vnode **a_vpp; 1737 struct componentname *a_cnp; 1738 struct vattr *a_vap; 1739 } */ *ap = v; 1740 struct vnode *dvp = ap->a_dvp; 1741 struct vattr *vap = ap->a_vap; 1742 struct componentname *cnp = ap->a_cnp; 1743 struct nfsv2_sattr *sp; 1744 u_int32_t *tl; 1745 caddr_t cp; 1746 int32_t t1, t2; 1747 int len; 1748 struct nfsnode *np = (struct nfsnode *)0; 1749 struct vnode *newvp = (struct vnode *)0; 1750 caddr_t bpos, dpos, cp2; 1751 int error = 0, wccflag = NFSV3_WCCRATTR; 1752 int gotvp = 0; 1753 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1754 int v3 = NFS_ISV3(dvp); 1755 1756 len = cnp->cn_namelen; 1757 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1758 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1759 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1760 nfsm_fhtom(dvp, v3); 1761 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1762 if (v3) { 1763 nfsm_v3attrbuild(vap, FALSE); 1764 } else { 1765 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1766 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1767 sp->sa_uid = nfs_xdrneg1; 1768 sp->sa_gid = nfs_xdrneg1; 1769 sp->sa_size = nfs_xdrneg1; 1770 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1771 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1772 } 1773 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1774 if (!error) 1775 nfsm_mtofh(dvp, newvp, v3, gotvp); 1776 if (v3) 1777 nfsm_wcc_data(dvp, wccflag); 1778 nfsm_reqdone; 1779 VTONFS(dvp)->n_flag |= NMODIFIED; 1780 if (!wccflag) 1781 VTONFS(dvp)->n_attrstamp = 0; 1782 /* 1783 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1784 * if we can succeed in looking up the directory. 1785 */ 1786 if (error == EEXIST || (!error && !gotvp)) { 1787 if (newvp) { 1788 vrele(newvp); 1789 newvp = (struct vnode *)0; 1790 } 1791 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1792 cnp->cn_proc, &np); 1793 if (!error) { 1794 newvp = NFSTOV(np); 1795 if (newvp->v_type != VDIR) 1796 error = EEXIST; 1797 } 1798 } 1799 if (error) { 1800 if (newvp) 1801 vrele(newvp); 1802 } else 1803 *ap->a_vpp = newvp; 1804 FREE(cnp->cn_pnbuf, M_NAMEI); 1805 vrele(dvp); 1806 return (error); 1807 } 1808 1809 /* 1810 * nfs remove directory call 1811 */ 1812 int 1813 nfs_rmdir(v) 1814 void *v; 1815 { 1816 struct vop_rmdir_args /* { 1817 struct vnode *a_dvp; 1818 struct vnode *a_vp; 1819 struct componentname *a_cnp; 1820 } */ *ap = v; 1821 struct vnode *vp = ap->a_vp; 1822 struct vnode *dvp = ap->a_dvp; 1823 struct componentname *cnp = ap->a_cnp; 1824 u_int32_t *tl; 1825 caddr_t cp; 1826 int32_t t1, t2; 1827 caddr_t bpos, dpos, cp2; 1828 int error = 0, wccflag = NFSV3_WCCRATTR; 1829 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1830 int v3 = NFS_ISV3(dvp); 1831 1832 if (dvp == vp) { 1833 vrele(dvp); 1834 vrele(dvp); 1835 FREE(cnp->cn_pnbuf, M_NAMEI); 1836 return (EINVAL); 1837 } 1838 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1839 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1840 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1841 nfsm_fhtom(dvp, v3); 1842 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1843 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1844 if (v3) 1845 nfsm_wcc_data(dvp, wccflag); 1846 nfsm_reqdone; 1847 FREE(cnp->cn_pnbuf, M_NAMEI); 1848 VTONFS(dvp)->n_flag |= NMODIFIED; 1849 if (!wccflag) 1850 VTONFS(dvp)->n_attrstamp = 0; 1851 cache_purge(dvp); 1852 cache_purge(vp); 1853 vrele(vp); 1854 vrele(dvp); 1855 /* 1856 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1857 */ 1858 if (error == ENOENT) 1859 error = 0; 1860 return (error); 1861 } 1862 1863 1864 /* 1865 * The readdir logic below has a big design bug. It stores the NFS cookie in 1866 * the returned uio->uio_offset but does not store the verifier (it cannot). 1867 * Instead, the code stores the verifier in the nfsnode and applies that 1868 * verifies to all cookies, no matter what verifier was originally with 1869 * the cookie. 1870 * 1871 * From a practical standpoint, this is not a problem since almost all 1872 * NFS servers do not change the validity of cookies across deletes 1873 * and inserts. 1874 */ 1875 1876 struct nfs_dirent { 1877 u_int32_t cookie[2]; 1878 struct dirent dirent; 1879 }; 1880 1881 #define NFS_DIRHDSIZ (sizeof (struct nfs_dirent) - (MAXNAMLEN + 1)) 1882 #define NFS_DIRENT_OVERHEAD offsetof(struct nfs_dirent, dirent) 1883 1884 /* 1885 * nfs readdir call 1886 */ 1887 int 1888 nfs_readdir(v) 1889 void *v; 1890 { 1891 struct vop_readdir_args /* { 1892 struct vnode *a_vp; 1893 struct uio *a_uio; 1894 struct ucred *a_cred; 1895 int *a_eofflag; 1896 u_long **a_cookies; 1897 int *a_ncookies; 1898 } */ *ap = v; 1899 struct vnode *vp = ap->a_vp; 1900 struct nfsnode *np = VTONFS(vp); 1901 struct uio *uio = ap->a_uio; 1902 int tresid, error; 1903 struct vattr vattr; 1904 u_long *cookies = NULL; 1905 int ncookies = 0, cnt; 1906 u_int64_t newoff = uio->uio_offset; 1907 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1908 struct uio readdir_uio; 1909 struct iovec readdir_iovec; 1910 struct proc * p = uio->uio_procp; 1911 int done = 0, eof = 0; 1912 struct ucred *cred = ap->a_cred; 1913 void *data; 1914 1915 if (vp->v_type != VDIR) 1916 return (EPERM); 1917 /* 1918 * First, check for hit on the EOF offset cache 1919 */ 1920 if (np->n_direofoffset != 0 && 1921 uio->uio_offset == np->n_direofoffset) { 1922 if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 && 1923 np->n_mtime == vattr.va_mtime.tv_sec) { 1924 nfsstats.direofcache_hits++; 1925 *ap->a_eofflag = 1; 1926 return (0); 1927 } 1928 } 1929 1930 if (uio->uio_resid < NFS_FABLKSIZE) 1931 return (EINVAL); 1932 1933 tresid = uio->uio_resid; 1934 1935 if (uio->uio_rw != UIO_READ) 1936 return (EINVAL); 1937 1938 if (ap->a_cookies) { 1939 ncookies = uio->uio_resid / 20; 1940 1941 MALLOC(cookies, u_long *, sizeof(*cookies) * ncookies, 1942 M_TEMP, M_WAITOK); 1943 *ap->a_ncookies = ncookies; 1944 *ap->a_cookies = cookies; 1945 } 1946 1947 if ((nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_GOTFSINFO)) == NFSMNT_NFSV3) 1948 (void)nfs_fsinfo(nmp, vp, cred, p); 1949 1950 cnt = 5; 1951 1952 MALLOC(data, void *, NFS_DIRBLKSIZ, M_TEMP, 1953 M_WAITOK); 1954 1955 do { 1956 struct nfs_dirent *ndp = data; 1957 1958 readdir_iovec.iov_len = NFS_DIRBLKSIZ; 1959 readdir_iovec.iov_base = data; 1960 readdir_uio.uio_offset = newoff; 1961 readdir_uio.uio_iov = &readdir_iovec; 1962 readdir_uio.uio_iovcnt = 1; 1963 readdir_uio.uio_segflg = UIO_SYSSPACE; 1964 readdir_uio.uio_rw = UIO_READ; 1965 readdir_uio.uio_resid = NFS_DIRBLKSIZ; 1966 readdir_uio.uio_procp = curproc; 1967 1968 if (nmp->nm_flag & NFSMNT_RDIRPLUS) { 1969 error = nfs_readdirplusrpc(vp, &readdir_uio, cred, 1970 &eof); 1971 if (error == NFSERR_NOTSUPP) 1972 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 1973 } 1974 if ((nmp->nm_flag & NFSMNT_RDIRPLUS) == 0) 1975 error = nfs_readdirrpc(vp, &readdir_uio, cred, &eof); 1976 1977 if (error == NFSERR_BAD_COOKIE) 1978 error = EINVAL; 1979 1980 while (error == 0 && 1981 (ap->a_cookies == NULL || ncookies != 0) && 1982 ndp < (struct nfs_dirent *)readdir_iovec.iov_base) { 1983 struct dirent *dp = &ndp->dirent; 1984 int reclen = dp->d_reclen; 1985 1986 dp->d_reclen -= NFS_DIRENT_OVERHEAD; 1987 1988 if (uio->uio_resid < dp->d_reclen) { 1989 done = 1; 1990 break; 1991 } 1992 1993 error = uiomove((caddr_t)dp, dp->d_reclen, uio); 1994 if (error) 1995 break; 1996 1997 newoff = fxdr_hyper(&ndp->cookie[0]); 1998 1999 if (ap->a_cookies != NULL) { 2000 *cookies = newoff; 2001 cookies++; 2002 ncookies--; 2003 } 2004 2005 ndp = (struct nfs_dirent *)((u_int8_t *)ndp + reclen); 2006 } 2007 } while (!error && !done && !eof && cnt--); 2008 2009 FREE(data, M_TEMP); 2010 data = NULL; 2011 2012 if (ap->a_cookies) { 2013 if (error) { 2014 FREE(*ap->a_cookies, M_TEMP); 2015 *ap->a_cookies = NULL; 2016 *ap->a_ncookies = 0; 2017 } else { 2018 *ap->a_ncookies -= ncookies; 2019 } 2020 } 2021 2022 if (!error) 2023 uio->uio_offset = newoff; 2024 2025 if (!error && (eof || uio->uio_resid == tresid)) { 2026 nfsstats.direofcache_misses++; 2027 *ap->a_eofflag = 1; 2028 return (0); 2029 } 2030 2031 *ap->a_eofflag = 0; 2032 return (error); 2033 } 2034 2035 2036 /* 2037 * The function below stuff the cookies in after the name 2038 */ 2039 2040 /* 2041 * Readdir rpc call. 2042 */ 2043 int 2044 nfs_readdirrpc(struct vnode *vp, 2045 struct uio *uiop, 2046 struct ucred *cred, 2047 int *end_of_directory) 2048 { 2049 int len, left; 2050 struct nfs_dirent *ndp = NULL; 2051 struct dirent *dp = NULL; 2052 u_int32_t *tl; 2053 caddr_t cp; 2054 int32_t t1, t2; 2055 caddr_t bpos, dpos, cp2; 2056 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2057 nfsuint64 cookie; 2058 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2059 struct nfsnode *dnp = VTONFS(vp); 2060 u_quad_t fileno; 2061 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2062 int attrflag; 2063 int v3 = NFS_ISV3(vp); 2064 2065 #ifndef DIAGNOSTIC 2066 if (uiop->uio_iovcnt != 1 || 2067 (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2068 panic("nfs readdirrpc bad uio"); 2069 #endif 2070 2071 txdr_hyper(uiop->uio_offset, &cookie.nfsuquad[0]); 2072 2073 /* 2074 * Loop around doing readdir rpc's of size nm_readdirsize 2075 * truncated to a multiple of NFS_READDIRBLKSIZ. 2076 * The stopping criteria is EOF or buffer full. 2077 */ 2078 while (more_dirs && bigenough) { 2079 nfsstats.rpccnt[NFSPROC_READDIR]++; 2080 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2081 NFSX_READDIR(v3)); 2082 nfsm_fhtom(vp, v3); 2083 if (v3) { 2084 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2085 *tl++ = cookie.nfsuquad[0]; 2086 *tl++ = cookie.nfsuquad[1]; 2087 if (cookie.nfsuquad[0] == 0 && 2088 cookie.nfsuquad[1] == 0) { 2089 *tl++ = 0; 2090 *tl++ = 0; 2091 } else { 2092 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2093 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2094 } 2095 } else { 2096 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2097 *tl++ = cookie.nfsuquad[1]; 2098 } 2099 *tl = txdr_unsigned(nmp->nm_readdirsize); 2100 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2101 if (v3) { 2102 nfsm_postop_attr(vp, attrflag); 2103 if (!error) { 2104 nfsm_dissect(tl, u_int32_t *, 2105 2 * NFSX_UNSIGNED); 2106 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2107 dnp->n_cookieverf.nfsuquad[1] = *tl; 2108 } else { 2109 m_freem(mrep); 2110 goto nfsmout; 2111 } 2112 } 2113 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2114 more_dirs = fxdr_unsigned(int, *tl); 2115 2116 /* loop thru the dir entries, doctoring them to 4bsd form */ 2117 while (more_dirs && bigenough) { 2118 if (v3) { 2119 nfsm_dissect(tl, u_int32_t *, 2120 3 * NFSX_UNSIGNED); 2121 fileno = fxdr_hyper(tl); 2122 len = fxdr_unsigned(int, *(tl + 2)); 2123 } else { 2124 nfsm_dissect(tl, u_int32_t *, 2125 2 * NFSX_UNSIGNED); 2126 fileno = fxdr_unsigned(u_quad_t, *tl++); 2127 len = fxdr_unsigned(int, *tl); 2128 } 2129 if (len <= 0 || len > NFS_MAXNAMLEN) { 2130 error = EBADRPC; 2131 m_freem(mrep); 2132 goto nfsmout; 2133 } 2134 tlen = nfsm_rndup(len + 1); 2135 left = NFS_READDIRBLKSIZ - blksiz; 2136 if ((tlen + NFS_DIRHDSIZ) > left) { 2137 dp->d_reclen += left; 2138 (caddr_t)uiop->uio_iov->iov_base += left; 2139 uiop->uio_iov->iov_len -= left; 2140 uiop->uio_resid -= left; 2141 blksiz = 0; 2142 } 2143 if ((tlen + NFS_DIRHDSIZ) > uiop->uio_resid) 2144 bigenough = 0; 2145 if (bigenough) { 2146 ndp = (struct nfs_dirent *) 2147 uiop->uio_iov->iov_base; 2148 dp = &ndp->dirent; 2149 dp->d_fileno = (int)fileno; 2150 dp->d_namlen = len; 2151 dp->d_reclen = tlen + NFS_DIRHDSIZ; 2152 dp->d_type = DT_UNKNOWN; 2153 blksiz += dp->d_reclen; 2154 if (blksiz == NFS_READDIRBLKSIZ) 2155 blksiz = 0; 2156 uiop->uio_resid -= NFS_DIRHDSIZ; 2157 uiop->uio_iov->iov_base += NFS_DIRHDSIZ; 2158 uiop->uio_iov->iov_len -= NFS_DIRHDSIZ; 2159 nfsm_mtouio(uiop, len); 2160 cp = uiop->uio_iov->iov_base; 2161 tlen -= len; 2162 *cp = '\0'; /* null terminate */ 2163 (caddr_t)uiop->uio_iov->iov_base += tlen; 2164 uiop->uio_iov->iov_len -= tlen; 2165 uiop->uio_resid -= tlen; 2166 } else 2167 nfsm_adv(nfsm_rndup(len)); 2168 if (v3) { 2169 nfsm_dissect(tl, u_int32_t *, 2170 3 * NFSX_UNSIGNED); 2171 } else { 2172 nfsm_dissect(tl, u_int32_t *, 2173 2 * NFSX_UNSIGNED); 2174 } 2175 if (bigenough) { 2176 if (v3) { 2177 ndp->cookie[0] = cookie.nfsuquad[0] = 2178 *tl++; 2179 } else 2180 ndp->cookie[0] = 0; 2181 2182 ndp->cookie[1] = cookie.nfsuquad[1] = *tl++; 2183 } else if (v3) 2184 tl += 2; 2185 else 2186 tl++; 2187 more_dirs = fxdr_unsigned(int, *tl); 2188 } 2189 /* 2190 * If at end of rpc data, get the eof boolean 2191 */ 2192 if (!more_dirs) { 2193 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2194 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2195 } 2196 m_freem(mrep); 2197 } 2198 /* 2199 * Fill last record, iff any, out to a multiple of NFS_READDIRBLKSIZ 2200 * by increasing d_reclen for the last record. 2201 */ 2202 if (blksiz > 0) { 2203 left = NFS_READDIRBLKSIZ - blksiz; 2204 dp->d_reclen += left; 2205 uiop->uio_iov->iov_base += left; 2206 uiop->uio_iov->iov_len -= left; 2207 uiop->uio_resid -= left; 2208 } 2209 2210 /* 2211 * We are now either at the end of the directory or have filled the 2212 * block. 2213 */ 2214 if (bigenough) { 2215 dnp->n_direofoffset = fxdr_hyper(&cookie.nfsuquad[0]); 2216 if (end_of_directory) *end_of_directory = 1; 2217 } else { 2218 if (uiop->uio_resid > 0) 2219 printf("EEK! readdirrpc resid > 0\n"); 2220 } 2221 2222 nfsmout: 2223 return (error); 2224 } 2225 2226 /* 2227 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2228 */ 2229 int 2230 nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2231 int *end_of_directory) 2232 { 2233 int len, left; 2234 struct nfs_dirent *ndirp = NULL; 2235 struct dirent *dp = NULL; 2236 u_int32_t *tl; 2237 caddr_t cp; 2238 int32_t t1, t2; 2239 struct vnode *newvp; 2240 caddr_t bpos, dpos, cp2, dpossav1, dpossav2; 2241 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; 2242 struct nameidata nami, *ndp = &nami; 2243 struct componentname *cnp = &ndp->ni_cnd; 2244 nfsuint64 cookie; 2245 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2246 struct nfsnode *dnp = VTONFS(vp), *np; 2247 nfsfh_t *fhp; 2248 u_quad_t fileno; 2249 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2250 int attrflag, fhsize; 2251 2252 #ifndef DIAGNOSTIC 2253 if (uiop->uio_iovcnt != 1 || 2254 (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2255 panic("nfs readdirplusrpc bad uio"); 2256 #endif 2257 ndp->ni_dvp = vp; 2258 newvp = NULLVP; 2259 2260 txdr_hyper(uiop->uio_offset, &cookie.nfsuquad[0]); 2261 2262 /* 2263 * Loop around doing readdir rpc's of size nm_readdirsize 2264 * truncated to a multiple of NFS_READDIRBLKSIZ. 2265 * The stopping criteria is EOF or buffer full. 2266 */ 2267 while (more_dirs && bigenough) { 2268 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2269 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2270 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2271 nfsm_fhtom(vp, 1); 2272 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2273 *tl++ = cookie.nfsuquad[0]; 2274 *tl++ = cookie.nfsuquad[1]; 2275 if (cookie.nfsuquad[0] == 0 && 2276 cookie.nfsuquad[1] == 0) { 2277 *tl++ = 0; 2278 *tl++ = 0; 2279 } else { 2280 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2281 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2282 } 2283 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2284 *tl = txdr_unsigned(nmp->nm_rsize); 2285 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2286 nfsm_postop_attr(vp, attrflag); 2287 if (error) { 2288 m_freem(mrep); 2289 goto nfsmout; 2290 } 2291 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2292 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2293 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2294 more_dirs = fxdr_unsigned(int, *tl); 2295 2296 /* loop thru the dir entries, doctoring them to 4bsd form */ 2297 while (more_dirs && bigenough) { 2298 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2299 fileno = fxdr_hyper(tl); 2300 len = fxdr_unsigned(int, *(tl + 2)); 2301 if (len <= 0 || len > NFS_MAXNAMLEN) { 2302 error = EBADRPC; 2303 m_freem(mrep); 2304 goto nfsmout; 2305 } 2306 tlen = nfsm_rndup(len + 1); 2307 left = NFS_READDIRBLKSIZ - blksiz; 2308 if ((tlen + NFS_DIRHDSIZ) > left) { 2309 dp->d_reclen += left; 2310 uiop->uio_iov->iov_base += left; 2311 uiop->uio_iov->iov_len -= left; 2312 uiop->uio_resid -= left; 2313 blksiz = 0; 2314 } 2315 if ((tlen + NFS_DIRHDSIZ) > uiop->uio_resid) 2316 bigenough = 0; 2317 if (bigenough) { 2318 ndirp = (struct nfs_dirent *) 2319 uiop->uio_iov->iov_base; 2320 dp = &ndirp->dirent; 2321 dp->d_fileno = (int)fileno; 2322 dp->d_namlen = len; 2323 dp->d_reclen = tlen + NFS_DIRHDSIZ; 2324 dp->d_type = DT_UNKNOWN; 2325 blksiz += dp->d_reclen; 2326 if (blksiz == NFS_READDIRBLKSIZ) 2327 blksiz = 0; 2328 uiop->uio_resid -= NFS_DIRHDSIZ; 2329 uiop->uio_iov->iov_base += NFS_DIRHDSIZ; 2330 uiop->uio_iov->iov_len -= NFS_DIRHDSIZ; 2331 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2332 cnp->cn_namelen = len; 2333 nfsm_mtouio(uiop, len); 2334 cp = uiop->uio_iov->iov_base; 2335 tlen -= len; 2336 *cp = '\0'; 2337 uiop->uio_iov->iov_base += tlen; 2338 uiop->uio_iov->iov_len -= tlen; 2339 uiop->uio_resid -= tlen; 2340 } else 2341 nfsm_adv(nfsm_rndup(len)); 2342 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2343 if (bigenough) { 2344 ndirp->cookie[0] = cookie.nfsuquad[0] = *tl++; 2345 ndirp->cookie[1] = cookie.nfsuquad[1] = *tl++; 2346 } else 2347 tl += 2; 2348 2349 /* 2350 * Since the attributes are before the file handle 2351 * (sigh), we must skip over the attributes and then 2352 * come back and get them. 2353 */ 2354 attrflag = fxdr_unsigned(int, *tl); 2355 if (attrflag) { 2356 dpossav1 = dpos; 2357 mdsav1 = md; 2358 nfsm_adv(NFSX_V3FATTR); 2359 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2360 doit = fxdr_unsigned(int, *tl); 2361 if (doit) { 2362 nfsm_getfh(fhp, fhsize, 1); 2363 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2364 VREF(vp); 2365 newvp = vp; 2366 np = dnp; 2367 } else { 2368 error = nfs_nget(vp->v_mount, fhp, 2369 fhsize, &np); 2370 if (error) 2371 doit = 0; 2372 else 2373 newvp = NFSTOV(np); 2374 } 2375 } 2376 if (doit) { 2377 dpossav2 = dpos; 2378 dpos = dpossav1; 2379 mdsav2 = md; 2380 md = mdsav1; 2381 nfsm_loadattr(newvp, (struct vattr *)0); 2382 dpos = dpossav2; 2383 md = mdsav2; 2384 dp->d_type = 2385 IFTODT(VTTOIF(np->n_vattr.va_type)); 2386 ndp->ni_vp = newvp; 2387 cnp->cn_hash = 0; 2388 for (cp = cnp->cn_nameptr, i = 1; i <= len; 2389 i++, cp++) 2390 cnp->cn_hash += (unsigned char)*cp * i; 2391 if (cnp->cn_namelen <= NCHNAMLEN) 2392 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 2393 } 2394 } else { 2395 /* Just skip over the file handle */ 2396 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2397 i = fxdr_unsigned(int, *tl); 2398 nfsm_adv(nfsm_rndup(i)); 2399 } 2400 if (newvp != NULLVP) { 2401 vrele(newvp); 2402 newvp = NULLVP; 2403 } 2404 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2405 more_dirs = fxdr_unsigned(int, *tl); 2406 } 2407 /* 2408 * If at end of rpc data, get the eof boolean 2409 */ 2410 if (!more_dirs) { 2411 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2412 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2413 } 2414 m_freem(mrep); 2415 } 2416 /* 2417 * Fill last record, iff any, out to a multiple of NFS_READDIRBLKSIZ 2418 * by increasing d_reclen for the last record. 2419 */ 2420 if (blksiz > 0) { 2421 left = NFS_READDIRBLKSIZ - blksiz; 2422 dp->d_reclen += left; 2423 uiop->uio_iov->iov_base += left; 2424 uiop->uio_iov->iov_len -= left; 2425 uiop->uio_resid -= left; 2426 } 2427 2428 /* 2429 * We are now either at the end of the directory or have filled the 2430 * block. 2431 */ 2432 if (bigenough) { 2433 dnp->n_direofoffset = fxdr_hyper(&cookie.nfsuquad[0]); 2434 if (end_of_directory) *end_of_directory = 1; 2435 } else { 2436 if (uiop->uio_resid > 0) 2437 printf("EEK! readdirplusrpc resid > 0\n"); 2438 } 2439 2440 nfsmout: 2441 if (newvp != NULLVP) 2442 vrele(newvp); 2443 return (error); 2444 } 2445 2446 /* 2447 * Silly rename. To make the NFS filesystem that is stateless look a little 2448 * more like the "ufs" a remove of an active vnode is translated to a rename 2449 * to a funny looking filename that is removed by nfs_inactive on the 2450 * nfsnode. There is the potential for another process on a different client 2451 * to create the same funny name between the nfs_lookitup() fails and the 2452 * nfs_rename() completes, but... 2453 */ 2454 int 2455 nfs_sillyrename(dvp, vp, cnp) 2456 struct vnode *dvp, *vp; 2457 struct componentname *cnp; 2458 { 2459 struct sillyrename *sp; 2460 struct nfsnode *np; 2461 int error; 2462 2463 cache_purge(dvp); 2464 np = VTONFS(vp); 2465 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2466 M_NFSREQ, M_WAITOK); 2467 sp->s_cred = crdup(cnp->cn_cred); 2468 sp->s_dvp = dvp; 2469 VREF(dvp); 2470 2471 if (vp->v_type == VDIR) { 2472 #ifdef DIAGNOSTIC 2473 printf("nfs: sillyrename dir\n"); 2474 #endif 2475 error = EINVAL; 2476 goto bad; 2477 } 2478 2479 /* Fudge together a funny name */ 2480 sp->s_namlen = snprintf(sp->s_name, sizeof sp->s_name, 2481 ".nfsA%05x4.4", cnp->cn_proc->p_pid); 2482 2483 /* Try lookitups until we get one that isn't there */ 2484 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2485 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2486 sp->s_name[4]++; 2487 if (sp->s_name[4] > 'z') { 2488 error = EINVAL; 2489 goto bad; 2490 } 2491 } 2492 error = nfs_renameit(dvp, cnp, sp); 2493 if (error) 2494 goto bad; 2495 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2496 cnp->cn_proc, &np); 2497 np->n_sillyrename = sp; 2498 return (0); 2499 bad: 2500 vrele(sp->s_dvp); 2501 crfree(sp->s_cred); 2502 FREE((caddr_t)sp, M_NFSREQ); 2503 return (error); 2504 } 2505 2506 /* 2507 * Look up a file name and optionally either update the file handle or 2508 * allocate an nfsnode, depending on the value of npp. 2509 * npp == NULL --> just do the lookup 2510 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2511 * handled too 2512 * *npp != NULL --> update the file handle in the vnode 2513 */ 2514 int 2515 nfs_lookitup(dvp, name, len, cred, procp, npp) 2516 struct vnode *dvp; 2517 char *name; 2518 int len; 2519 struct ucred *cred; 2520 struct proc *procp; 2521 struct nfsnode **npp; 2522 { 2523 u_int32_t *tl; 2524 caddr_t cp; 2525 int32_t t1, t2; 2526 struct vnode *newvp = (struct vnode *)0; 2527 struct nfsnode *np, *dnp = VTONFS(dvp); 2528 caddr_t bpos, dpos, cp2; 2529 int error = 0, fhlen, attrflag; 2530 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2531 nfsfh_t *nfhp; 2532 int v3 = NFS_ISV3(dvp); 2533 2534 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2535 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2536 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2537 nfsm_fhtom(dvp, v3); 2538 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2539 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2540 if (npp && !error) { 2541 nfsm_getfh(nfhp, fhlen, v3); 2542 if (*npp) { 2543 np = *npp; 2544 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2545 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2546 np->n_fhp = &np->n_fh; 2547 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2548 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2549 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2550 np->n_fhsize = fhlen; 2551 newvp = NFSTOV(np); 2552 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2553 VREF(dvp); 2554 newvp = dvp; 2555 } else { 2556 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2557 if (error) { 2558 m_freem(mrep); 2559 return (error); 2560 } 2561 newvp = NFSTOV(np); 2562 } 2563 if (v3) { 2564 nfsm_postop_attr(newvp, attrflag); 2565 if (!attrflag && *npp == NULL) { 2566 m_freem(mrep); 2567 vrele(newvp); 2568 return (ENOENT); 2569 } 2570 } else 2571 nfsm_loadattr(newvp, (struct vattr *)0); 2572 } 2573 nfsm_reqdone; 2574 if (npp && *npp == NULL) { 2575 if (error) { 2576 if (newvp) 2577 vrele(newvp); 2578 } else 2579 *npp = np; 2580 } 2581 return (error); 2582 } 2583 2584 /* 2585 * Nfs Version 3 commit rpc 2586 */ 2587 int 2588 nfs_commit(vp, offset, cnt, procp) 2589 struct vnode *vp; 2590 u_quad_t offset; 2591 int cnt; 2592 struct proc *procp; 2593 { 2594 caddr_t cp; 2595 u_int32_t *tl; 2596 int32_t t1, t2; 2597 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2598 caddr_t bpos, dpos, cp2; 2599 int error = 0, wccflag = NFSV3_WCCRATTR; 2600 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2601 2602 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) 2603 return (0); 2604 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2605 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2606 nfsm_fhtom(vp, 1); 2607 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2608 txdr_hyper(offset, tl); 2609 tl += 2; 2610 *tl = txdr_unsigned(cnt); 2611 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2612 nfsm_wcc_data(vp, wccflag); 2613 if (!error) { 2614 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2615 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2616 NFSX_V3WRITEVERF)) { 2617 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 2618 NFSX_V3WRITEVERF); 2619 error = NFSERR_STALEWRITEVERF; 2620 } 2621 } 2622 nfsm_reqdone; 2623 return (error); 2624 } 2625 2626 /* 2627 * Kludge City.. 2628 * - make nfs_bmap() essentially a no-op that does no translation 2629 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2630 * (Maybe I could use the process's page mapping, but I was concerned that 2631 * Kernel Write might not be enabled and also figured copyout() would do 2632 * a lot more work than bcopy() and also it currently happens in the 2633 * context of the swapper process (2). 2634 */ 2635 int 2636 nfs_bmap(v) 2637 void *v; 2638 { 2639 struct vop_bmap_args /* { 2640 struct vnode *a_vp; 2641 daddr_t a_bn; 2642 struct vnode **a_vpp; 2643 daddr_t *a_bnp; 2644 int *a_runp; 2645 } */ *ap = v; 2646 struct vnode *vp = ap->a_vp; 2647 2648 if (ap->a_vpp != NULL) 2649 *ap->a_vpp = vp; 2650 if (ap->a_bnp != NULL) 2651 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2652 return (0); 2653 } 2654 2655 /* 2656 * Strategy routine. 2657 * For async requests when nfsiod(s) are running, queue the request by 2658 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2659 * request. 2660 */ 2661 int 2662 nfs_strategy(v) 2663 void *v; 2664 { 2665 struct vop_strategy_args *ap = v; 2666 struct buf *bp = ap->a_bp; 2667 struct proc *p; 2668 int error = 0; 2669 2670 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2671 panic("nfs physio/async"); 2672 if (bp->b_flags & B_ASYNC) 2673 p = NULL; 2674 else 2675 p = curproc; /* XXX */ 2676 /* 2677 * If the op is asynchronous and an i/o daemon is waiting 2678 * queue the request, wake it up and wait for completion 2679 * otherwise just do it ourselves. 2680 */ 2681 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) 2682 error = nfs_doio(bp, p); 2683 return (error); 2684 } 2685 2686 /* 2687 * fsync vnode op. Just call nfs_flush() with commit == 1. 2688 */ 2689 /* ARGSUSED */ 2690 int 2691 nfs_fsync(v) 2692 void *v; 2693 { 2694 struct vop_fsync_args /* { 2695 struct vnodeop_desc *a_desc; 2696 struct vnode * a_vp; 2697 struct ucred * a_cred; 2698 int a_waitfor; 2699 struct proc * a_p; 2700 } */ *ap = v; 2701 2702 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1)); 2703 } 2704 2705 /* 2706 * Flush all the blocks associated with a vnode. 2707 * Walk through the buffer pool and push any dirty pages 2708 * associated with the vnode. 2709 */ 2710 int 2711 nfs_flush(vp, cred, waitfor, p, commit) 2712 struct vnode *vp; 2713 struct ucred *cred; 2714 int waitfor; 2715 struct proc *p; 2716 int commit; 2717 { 2718 struct nfsnode *np = VTONFS(vp); 2719 struct buf *bp; 2720 int i; 2721 struct buf *nbp; 2722 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2723 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2724 int passone = 1; 2725 u_quad_t off = (u_quad_t)-1, endoff = 0, toff; 2726 #ifndef NFS_COMMITBVECSIZ 2727 #define NFS_COMMITBVECSIZ 20 2728 #endif 2729 struct buf *bvec[NFS_COMMITBVECSIZ]; 2730 2731 if (nmp->nm_flag & NFSMNT_INT) 2732 slpflag = PCATCH; 2733 if (!commit) 2734 passone = 0; 2735 /* 2736 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2737 * server, but nas not been committed to stable storage on the server 2738 * yet. On the first pass, the byte range is worked out and the commit 2739 * rpc is done. On the second pass, nfs_writebp() is called to do the 2740 * job. 2741 */ 2742 again: 2743 bvecpos = 0; 2744 if (NFS_ISV3(vp) && commit) { 2745 s = splbio(); 2746 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp != NULL; bp = nbp) { 2747 nbp = LIST_NEXT(bp, b_vnbufs); 2748 if (bvecpos >= NFS_COMMITBVECSIZ) 2749 break; 2750 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2751 != (B_DELWRI | B_NEEDCOMMIT)) 2752 continue; 2753 bremfree(bp); 2754 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2755 /* 2756 * A list of these buffers is kept so that the 2757 * second loop knows which buffers have actually 2758 * been committed. This is necessary, since there 2759 * may be a race between the commit rpc and new 2760 * uncommitted writes on the file. 2761 */ 2762 bvec[bvecpos++] = bp; 2763 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2764 bp->b_dirtyoff; 2765 if (toff < off) 2766 off = toff; 2767 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2768 if (toff > endoff) 2769 endoff = toff; 2770 } 2771 splx(s); 2772 } 2773 if (bvecpos > 0) { 2774 /* 2775 * Commit data on the server, as required. 2776 */ 2777 retv = nfs_commit(vp, off, (int)(endoff - off), p); 2778 if (retv == NFSERR_STALEWRITEVERF) 2779 nfs_clearcommit(vp->v_mount); 2780 /* 2781 * Now, either mark the blocks I/O done or mark the 2782 * blocks dirty, depending on whether the commit 2783 * succeeded. 2784 */ 2785 for (i = 0; i < bvecpos; i++) { 2786 bp = bvec[i]; 2787 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2788 if (retv) 2789 brelse(bp); 2790 else { 2791 s = splbio(); 2792 buf_undirty(bp); 2793 vp->v_numoutput++; 2794 bp->b_flags |= B_ASYNC; 2795 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); 2796 bp->b_dirtyoff = bp->b_dirtyend = 0; 2797 biodone(bp); 2798 splx(s); 2799 } 2800 } 2801 } 2802 2803 /* 2804 * Start/do any write(s) that are required. 2805 */ 2806 loop: 2807 s = splbio(); 2808 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp != NULL; bp = nbp) { 2809 nbp = LIST_NEXT(bp, b_vnbufs); 2810 if (bp->b_flags & B_BUSY) { 2811 if (waitfor != MNT_WAIT || passone) 2812 continue; 2813 bp->b_flags |= B_WANTED; 2814 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2815 "nfsfsync", slptimeo); 2816 splx(s); 2817 if (error) { 2818 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2819 return (EINTR); 2820 if (slpflag == PCATCH) { 2821 slpflag = 0; 2822 slptimeo = 2 * hz; 2823 } 2824 } 2825 goto loop; 2826 } 2827 if ((bp->b_flags & B_DELWRI) == 0) 2828 panic("nfs_fsync: not dirty"); 2829 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2830 continue; 2831 bremfree(bp); 2832 if (passone || !commit) 2833 bp->b_flags |= (B_BUSY|B_ASYNC); 2834 else 2835 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2836 splx(s); 2837 VOP_BWRITE(bp); 2838 goto loop; 2839 } 2840 splx(s); 2841 if (passone) { 2842 passone = 0; 2843 goto again; 2844 } 2845 if (waitfor == MNT_WAIT) { 2846 loop2: 2847 s = splbio(); 2848 error = vwaitforio(vp, slpflag, "nfs_fsync", slptimeo); 2849 splx(s); 2850 if (error) { 2851 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2852 return (EINTR); 2853 if (slpflag == PCATCH) { 2854 slpflag = 0; 2855 slptimeo = 2 * hz; 2856 } 2857 goto loop2; 2858 } 2859 2860 if (LIST_FIRST(&vp->v_dirtyblkhd) && commit) { 2861 #if 0 2862 vprint("nfs_fsync: dirty", vp); 2863 #endif 2864 goto loop; 2865 } 2866 } 2867 if (np->n_flag & NWRITEERR) { 2868 error = np->n_error; 2869 np->n_flag &= ~NWRITEERR; 2870 } 2871 return (error); 2872 } 2873 2874 /* 2875 * Return POSIX pathconf information applicable to nfs. 2876 * 2877 * The NFS V2 protocol doesn't support this, so just return EINVAL 2878 * for V2. 2879 */ 2880 /* ARGSUSED */ 2881 int 2882 nfs_pathconf(v) 2883 void *v; 2884 { 2885 #if 0 2886 struct vop_pathconf_args /* { 2887 struct vnode *a_vp; 2888 int a_name; 2889 register_t *a_retval; 2890 } */ *ap = v; 2891 #endif 2892 2893 return (EINVAL); 2894 } 2895 2896 /* 2897 * NFS advisory byte-level locks. 2898 */ 2899 int 2900 nfs_advlock(v) 2901 void *v; 2902 { 2903 struct vop_advlock_args /* { 2904 struct vnode *a_vp; 2905 caddr_t a_id; 2906 int a_op; 2907 struct flock *a_fl; 2908 int a_flags; 2909 } */ *ap = v; 2910 struct nfsnode *np = VTONFS(ap->a_vp); 2911 2912 return (lf_advlock(&np->n_lockf, np->n_size, ap->a_id, ap->a_op, 2913 ap->a_fl, ap->a_flags)); 2914 } 2915 2916 /* 2917 * Print out the contents of an nfsnode. 2918 */ 2919 int 2920 nfs_print(v) 2921 void *v; 2922 { 2923 struct vop_print_args /* { 2924 struct vnode *a_vp; 2925 } */ *ap = v; 2926 struct vnode *vp = ap->a_vp; 2927 struct nfsnode *np = VTONFS(vp); 2928 2929 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 2930 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 2931 #ifdef FIFO 2932 if (vp->v_type == VFIFO) 2933 fifo_printinfo(vp); 2934 #endif 2935 printf("\n"); 2936 return (0); 2937 } 2938 2939 /* 2940 * Just call nfs_writebp() with the force argument set to 1. 2941 */ 2942 int 2943 nfs_bwrite(v) 2944 void *v; 2945 { 2946 struct vop_bwrite_args /* { 2947 struct buf *a_bp; 2948 } */ *ap = v; 2949 2950 return (nfs_writebp(ap->a_bp, 1)); 2951 } 2952 2953 /* 2954 * This is a clone of vop_generic_bwrite(), except that B_WRITEINPROG isn't set unless 2955 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 2956 */ 2957 int 2958 nfs_writebp(bp, force) 2959 struct buf *bp; 2960 int force; 2961 { 2962 int oldflags = bp->b_flags, retv = 1; 2963 struct proc *p = curproc; /* XXX */ 2964 off_t off; 2965 int s; 2966 2967 if(!(bp->b_flags & B_BUSY)) 2968 panic("bwrite: buffer is not busy???"); 2969 2970 #ifdef fvdl_debug 2971 printf("nfs_writebp(%x): vp %x voff %d vend %d doff %d dend %d\n", 2972 bp, bp->b_vp, bp->b_validoff, bp->b_validend, bp->b_dirtyoff, 2973 bp->b_dirtyend); 2974 #endif 2975 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); 2976 2977 s = splbio(); 2978 buf_undirty(bp); 2979 2980 if ((oldflags & B_ASYNC) && !(oldflags & B_DELWRI) && p) 2981 ++p->p_stats->p_ru.ru_oublock; 2982 2983 bp->b_vp->v_numoutput++; 2984 splx(s); 2985 2986 /* 2987 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 2988 * an actual write will have to be scheduled via. VOP_STRATEGY(). 2989 * If B_WRITEINPROG is already set, then push it with a write anyhow. 2990 */ 2991 if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) { 2992 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 2993 bp->b_flags |= B_WRITEINPROG; 2994 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 2995 bp->b_proc); 2996 bp->b_flags &= ~B_WRITEINPROG; 2997 if (!retv) { 2998 bp->b_dirtyoff = bp->b_dirtyend = 0; 2999 bp->b_flags &= ~B_NEEDCOMMIT; 3000 s = splbio(); 3001 biodone(bp); 3002 splx(s); 3003 } else if (retv == NFSERR_STALEWRITEVERF) 3004 nfs_clearcommit(bp->b_vp->v_mount); 3005 } 3006 if (retv) { 3007 if (force) 3008 bp->b_flags |= B_WRITEINPROG; 3009 VOP_STRATEGY(bp); 3010 } 3011 3012 if( (oldflags & B_ASYNC) == 0) { 3013 int rtval = biowait(bp); 3014 if (!(oldflags & B_DELWRI) && p) { 3015 ++p->p_stats->p_ru.ru_oublock; 3016 } 3017 brelse(bp); 3018 return (rtval); 3019 } 3020 3021 return (0); 3022 } 3023 3024 /* 3025 * nfs special file access vnode op. 3026 * Essentially just get vattr and then imitate iaccess() since the device is 3027 * local to the client. 3028 */ 3029 int 3030 nfsspec_access(v) 3031 void *v; 3032 { 3033 struct vop_access_args /* { 3034 struct vnode *a_vp; 3035 int a_mode; 3036 struct ucred *a_cred; 3037 struct proc *a_p; 3038 } */ *ap = v; 3039 struct vattr va; 3040 struct vnode *vp = ap->a_vp; 3041 int error; 3042 3043 /* 3044 * Disallow write attempts on filesystems mounted read-only; 3045 * unless the file is a socket, fifo, or a block or character 3046 * device resident on the filesystem. 3047 */ 3048 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3049 switch (vp->v_type) { 3050 case VREG: 3051 case VDIR: 3052 case VLNK: 3053 return (EROFS); 3054 default: 3055 break; 3056 } 3057 } 3058 3059 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3060 if (error) 3061 return (error); 3062 3063 return (vaccess(va.va_mode, va.va_uid, va.va_gid, ap->a_mode, 3064 ap->a_cred)); 3065 } 3066 3067 /* 3068 * Read wrapper for special devices. 3069 */ 3070 int 3071 nfsspec_read(v) 3072 void *v; 3073 { 3074 struct vop_read_args /* { 3075 struct vnode *a_vp; 3076 struct uio *a_uio; 3077 int a_ioflag; 3078 struct ucred *a_cred; 3079 } */ *ap = v; 3080 struct nfsnode *np = VTONFS(ap->a_vp); 3081 3082 /* 3083 * Set access flag. 3084 */ 3085 np->n_flag |= NACC; 3086 np->n_atim.tv_sec = time.tv_sec; 3087 np->n_atim.tv_nsec = time.tv_usec * 1000; 3088 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3089 } 3090 3091 /* 3092 * Write wrapper for special devices. 3093 */ 3094 int 3095 nfsspec_write(v) 3096 void *v; 3097 { 3098 struct vop_write_args /* { 3099 struct vnode *a_vp; 3100 struct uio *a_uio; 3101 int a_ioflag; 3102 struct ucred *a_cred; 3103 } */ *ap = v; 3104 struct nfsnode *np = VTONFS(ap->a_vp); 3105 3106 /* 3107 * Set update flag. 3108 */ 3109 np->n_flag |= NUPD; 3110 np->n_mtim.tv_sec = time.tv_sec; 3111 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3112 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3113 } 3114 3115 /* 3116 * Close wrapper for special devices. 3117 * 3118 * Update the times on the nfsnode then do device close. 3119 */ 3120 int 3121 nfsspec_close(v) 3122 void *v; 3123 { 3124 struct vop_close_args /* { 3125 struct vnode *a_vp; 3126 int a_fflag; 3127 struct ucred *a_cred; 3128 struct proc *a_p; 3129 } */ *ap = v; 3130 struct vnode *vp = ap->a_vp; 3131 struct nfsnode *np = VTONFS(vp); 3132 struct vattr vattr; 3133 3134 if (np->n_flag & (NACC | NUPD)) { 3135 np->n_flag |= NCHG; 3136 if (vp->v_usecount == 1 && 3137 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3138 VATTR_NULL(&vattr); 3139 if (np->n_flag & NACC) 3140 vattr.va_atime = np->n_atim; 3141 if (np->n_flag & NUPD) 3142 vattr.va_mtime = np->n_mtim; 3143 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3144 } 3145 } 3146 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3147 } 3148 3149 #ifdef FIFO 3150 /* 3151 * Read wrapper for fifos. 3152 */ 3153 int 3154 nfsfifo_read(v) 3155 void *v; 3156 { 3157 struct vop_read_args /* { 3158 struct vnode *a_vp; 3159 struct uio *a_uio; 3160 int a_ioflag; 3161 struct ucred *a_cred; 3162 } */ *ap = v; 3163 extern int (**fifo_vnodeop_p)(void *); 3164 struct nfsnode *np = VTONFS(ap->a_vp); 3165 3166 /* 3167 * Set access flag. 3168 */ 3169 np->n_flag |= NACC; 3170 np->n_atim.tv_sec = time.tv_sec; 3171 np->n_atim.tv_nsec = time.tv_usec * 1000; 3172 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3173 } 3174 3175 /* 3176 * Write wrapper for fifos. 3177 */ 3178 int 3179 nfsfifo_write(v) 3180 void *v; 3181 { 3182 struct vop_write_args /* { 3183 struct vnode *a_vp; 3184 struct uio *a_uio; 3185 int a_ioflag; 3186 struct ucred *a_cred; 3187 } */ *ap = v; 3188 extern int (**fifo_vnodeop_p)(void *); 3189 struct nfsnode *np = VTONFS(ap->a_vp); 3190 3191 /* 3192 * Set update flag. 3193 */ 3194 np->n_flag |= NUPD; 3195 np->n_mtim.tv_sec = time.tv_sec; 3196 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3197 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3198 } 3199 3200 /* 3201 * Close wrapper for fifos. 3202 * 3203 * Update the times on the nfsnode then do fifo close. 3204 */ 3205 int 3206 nfsfifo_close(v) 3207 void *v; 3208 { 3209 struct vop_close_args /* { 3210 struct vnode *a_vp; 3211 int a_fflag; 3212 struct ucred *a_cred; 3213 struct proc *a_p; 3214 } */ *ap = v; 3215 struct vnode *vp = ap->a_vp; 3216 struct nfsnode *np = VTONFS(vp); 3217 struct vattr vattr; 3218 extern int (**fifo_vnodeop_p)(void *); 3219 3220 if (np->n_flag & (NACC | NUPD)) { 3221 if (np->n_flag & NACC) { 3222 np->n_atim.tv_sec = time.tv_sec; 3223 np->n_atim.tv_nsec = time.tv_usec * 1000; 3224 } 3225 if (np->n_flag & NUPD) { 3226 np->n_mtim.tv_sec = time.tv_sec; 3227 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3228 } 3229 np->n_flag |= NCHG; 3230 if (vp->v_usecount == 1 && 3231 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3232 VATTR_NULL(&vattr); 3233 if (np->n_flag & NACC) 3234 vattr.va_atime = np->n_atim; 3235 if (np->n_flag & NUPD) 3236 vattr.va_mtime = np->n_mtim; 3237 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3238 } 3239 } 3240 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3241 } 3242 #endif /* ! FIFO */ 3243