1 /* $OpenBSD: nfs_vnops.c,v 1.37 2001/07/26 20:24:47 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 40 */ 41 42 43 /* 44 * vnode op calls for Sun NFS version 2 and 3 45 */ 46 47 #include <sys/param.h> 48 #include <sys/proc.h> 49 #include <sys/kernel.h> 50 #include <sys/systm.h> 51 #include <sys/resourcevar.h> 52 #include <sys/proc.h> 53 #include <sys/mount.h> 54 #include <sys/buf.h> 55 #include <sys/malloc.h> 56 #include <sys/mbuf.h> 57 #include <sys/conf.h> 58 #include <sys/namei.h> 59 #include <sys/vnode.h> 60 #include <sys/dirent.h> 61 #include <sys/fcntl.h> 62 #include <sys/lockf.h> 63 64 #include <vm/vm.h> 65 66 #include <miscfs/specfs/specdev.h> 67 #include <miscfs/fifofs/fifo.h> 68 69 #include <nfs/rpcv2.h> 70 #include <nfs/nfsproto.h> 71 #include <nfs/nfs.h> 72 #include <nfs/nfsnode.h> 73 #include <nfs/nfsmount.h> 74 #include <nfs/xdr_subs.h> 75 #include <nfs/nfsm_subs.h> 76 #include <nfs/nfs_var.h> 77 78 #include <net/if.h> 79 #include <netinet/in.h> 80 #include <netinet/in_var.h> 81 82 /* Defs */ 83 #define TRUE 1 84 #define FALSE 0 85 86 /* 87 * Global vfs data structures for nfs 88 */ 89 int (**nfsv2_vnodeop_p) __P((void *)); 90 struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 91 { &vop_default_desc, vn_default_error }, 92 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 93 { &vop_create_desc, nfs_create }, /* create */ 94 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 95 { &vop_open_desc, nfs_open }, /* open */ 96 { &vop_close_desc, nfs_close }, /* close */ 97 { &vop_access_desc, nfs_access }, /* access */ 98 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 99 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 100 { &vop_read_desc, nfs_read }, /* read */ 101 { &vop_write_desc, nfs_write }, /* write */ 102 { &vop_lease_desc, nfs_lease_check }, /* lease */ 103 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 104 { &vop_select_desc, nfs_select }, /* select */ 105 { &vop_kqfilter_desc, vop_generic_kqfilter }, /* kqfilter */ 106 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 107 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 108 { &vop_remove_desc, nfs_remove }, /* remove */ 109 { &vop_link_desc, nfs_link }, /* link */ 110 { &vop_rename_desc, nfs_rename }, /* rename */ 111 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 112 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 113 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 114 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 115 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 116 { &vop_abortop_desc, vop_generic_abortop }, /* abortop */ 117 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 118 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 119 { &vop_lock_desc, nfs_lock }, /* lock */ 120 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 121 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 122 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 123 { &vop_print_desc, nfs_print }, /* print */ 124 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 125 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 126 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 127 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 128 { &vop_bwrite_desc, nfs_bwrite }, 129 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 130 }; 131 struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 132 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 133 134 /* 135 * Special device vnode ops 136 */ 137 int (**spec_nfsv2nodeop_p) __P((void *)); 138 struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 139 { &vop_default_desc, vn_default_error }, 140 { &vop_lookup_desc, spec_lookup }, /* lookup */ 141 { &vop_create_desc, spec_create }, /* create */ 142 { &vop_mknod_desc, spec_mknod }, /* mknod */ 143 { &vop_open_desc, spec_open }, /* open */ 144 { &vop_close_desc, nfsspec_close }, /* close */ 145 { &vop_access_desc, nfsspec_access }, /* access */ 146 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 147 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 148 { &vop_read_desc, nfsspec_read }, /* read */ 149 { &vop_write_desc, nfsspec_write }, /* write */ 150 { &vop_lease_desc, spec_lease_check }, /* lease */ 151 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 152 { &vop_select_desc, spec_select }, /* select */ 153 { &vop_revoke_desc, spec_revoke }, /* revoke */ 154 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 155 { &vop_remove_desc, spec_remove }, /* remove */ 156 { &vop_link_desc, spec_link }, /* link */ 157 { &vop_rename_desc, spec_rename }, /* rename */ 158 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 159 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 160 { &vop_symlink_desc, spec_symlink }, /* symlink */ 161 { &vop_readdir_desc, spec_readdir }, /* readdir */ 162 { &vop_readlink_desc, spec_readlink }, /* readlink */ 163 { &vop_abortop_desc, spec_abortop }, /* abortop */ 164 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 165 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 166 { &vop_lock_desc, nfs_lock }, /* lock */ 167 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 168 { &vop_bmap_desc, spec_bmap }, /* bmap */ 169 { &vop_strategy_desc, spec_strategy }, /* strategy */ 170 { &vop_print_desc, nfs_print }, /* print */ 171 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 172 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 173 { &vop_advlock_desc, spec_advlock }, /* advlock */ 174 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 175 { &vop_bwrite_desc, vop_generic_bwrite }, 176 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 177 }; 178 struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 179 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 180 181 #ifdef FIFO 182 int (**fifo_nfsv2nodeop_p) __P((void *)); 183 struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 184 { &vop_default_desc, vn_default_error }, 185 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 186 { &vop_create_desc, fifo_create }, /* create */ 187 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 188 { &vop_open_desc, fifo_open }, /* open */ 189 { &vop_close_desc, nfsfifo_close }, /* close */ 190 { &vop_access_desc, nfsspec_access }, /* access */ 191 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 192 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 193 { &vop_read_desc, nfsfifo_read }, /* read */ 194 { &vop_write_desc, nfsfifo_write }, /* write */ 195 { &vop_lease_desc, fifo_lease_check }, /* lease */ 196 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 197 { &vop_select_desc, fifo_select }, /* select */ 198 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 199 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 200 { &vop_remove_desc, fifo_remove }, /* remove */ 201 { &vop_link_desc, fifo_link }, /* link */ 202 { &vop_rename_desc, fifo_rename }, /* rename */ 203 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 204 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 205 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 206 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 207 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 208 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 209 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 210 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 211 { &vop_lock_desc, nfs_lock }, /* lock */ 212 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 213 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 214 { &vop_strategy_desc, fifo_badop }, /* strategy */ 215 { &vop_print_desc, nfs_print }, /* print */ 216 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 217 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 218 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 219 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 220 { &vop_bwrite_desc, vop_generic_bwrite }, 221 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 222 }; 223 struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 224 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 225 #endif /* FIFO */ 226 227 /* 228 * Global variables 229 */ 230 extern u_int32_t nfs_true, nfs_false; 231 extern u_int32_t nfs_xdrneg1; 232 extern struct nfsstats nfsstats; 233 extern nfstype nfsv3_type[9]; 234 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 235 int nfs_numasync = 0; 236 237 /* 238 * nfs null call from vfs. 239 */ 240 int 241 nfs_null(vp, cred, procp) 242 struct vnode *vp; 243 struct ucred *cred; 244 struct proc *procp; 245 { 246 caddr_t bpos, dpos; 247 int error = 0; 248 struct mbuf *mreq, *mrep, *md, *mb; 249 250 nfsm_reqhead(vp, NFSPROC_NULL, 0); 251 nfsm_request(vp, NFSPROC_NULL, procp, cred); 252 nfsm_reqdone; 253 return (error); 254 } 255 256 /* 257 * nfs access vnode op. 258 * For nfs version 2, just return ok. File accesses may fail later. 259 * For nfs version 3, use the access rpc to check accessibility. If file modes 260 * are changed on the server, accesses might still fail later. 261 */ 262 int 263 nfs_access(v) 264 void *v; 265 { 266 struct vop_access_args /* { 267 struct vnode *a_vp; 268 int a_mode; 269 struct ucred *a_cred; 270 struct proc *a_p; 271 } */ *ap = v; 272 register struct vnode *vp = ap->a_vp; 273 register u_int32_t *tl; 274 register caddr_t cp; 275 register int32_t t1, t2; 276 caddr_t bpos, dpos, cp2; 277 int error = 0, attrflag; 278 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 279 u_int32_t mode, rmode; 280 int v3 = NFS_ISV3(vp); 281 282 /* 283 * Disallow write attempts on filesystems mounted read-only; 284 * unless the file is a socket, fifo, or a block or character 285 * device resident on the filesystem. 286 */ 287 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 288 switch (vp->v_type) { 289 case VREG: 290 case VDIR: 291 case VLNK: 292 return (EROFS); 293 default: 294 break; 295 } 296 } 297 /* 298 * For nfs v3, do an access rpc, otherwise you are stuck emulating 299 * ufs_access() locally using the vattr. This may not be correct, 300 * since the server may apply other access criteria such as 301 * client uid-->server uid mapping that we do not know about, but 302 * this is better than just returning anything that is lying about 303 * in the cache. 304 */ 305 if (v3) { 306 nfsstats.rpccnt[NFSPROC_ACCESS]++; 307 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 308 nfsm_fhtom(vp, v3); 309 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 310 if (ap->a_mode & VREAD) 311 mode = NFSV3ACCESS_READ; 312 else 313 mode = 0; 314 if (vp->v_type == VDIR) { 315 if (ap->a_mode & VWRITE) 316 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 317 NFSV3ACCESS_DELETE); 318 if (ap->a_mode & VEXEC) 319 mode |= NFSV3ACCESS_LOOKUP; 320 } else { 321 if (ap->a_mode & VWRITE) 322 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 323 if (ap->a_mode & VEXEC) 324 mode |= NFSV3ACCESS_EXECUTE; 325 } 326 *tl = txdr_unsigned(mode); 327 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 328 nfsm_postop_attr(vp, attrflag); 329 if (!error) { 330 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 331 rmode = fxdr_unsigned(u_int32_t, *tl); 332 /* 333 * The NFS V3 spec does not clarify whether or not 334 * the returned access bits can be a superset of 335 * the ones requested, so... 336 */ 337 if ((rmode & mode) != mode) 338 error = EACCES; 339 } 340 nfsm_reqdone; 341 return (error); 342 } else 343 return (nfsspec_access(ap)); 344 } 345 346 /* 347 * nfs open vnode op 348 * Check to see if the type is ok 349 * and that deletion is not in progress. 350 * For paged in text files, you will need to flush the page cache 351 * if consistency is lost. 352 */ 353 /* ARGSUSED */ 354 int 355 nfs_open(v) 356 void *v; 357 { 358 struct vop_open_args /* { 359 struct vnode *a_vp; 360 int a_mode; 361 struct ucred *a_cred; 362 struct proc *a_p; 363 } */ *ap = v; 364 register struct vnode *vp = ap->a_vp; 365 struct nfsnode *np = VTONFS(vp); 366 struct vattr vattr; 367 int error; 368 369 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 370 #ifdef DIAGNOSTIC 371 printf("open eacces vtyp=%d\n",vp->v_type); 372 #endif 373 return (EACCES); 374 } 375 376 if (np->n_flag & NMODIFIED) { 377 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 378 ap->a_p, 1)) == EINTR) 379 return (error); 380 uvm_vnp_uncache(vp); 381 np->n_attrstamp = 0; 382 if (vp->v_type == VDIR) 383 np->n_direofoffset = 0; 384 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 385 if (error) 386 return (error); 387 np->n_mtime = vattr.va_mtime.tv_sec; 388 } else { 389 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 390 if (error) 391 return (error); 392 if (np->n_mtime != vattr.va_mtime.tv_sec) { 393 if (vp->v_type == VDIR) 394 np->n_direofoffset = 0; 395 if ((error = nfs_vinvalbuf(vp, V_SAVE, 396 ap->a_cred, ap->a_p, 1)) == EINTR) 397 return (error); 398 uvm_vnp_uncache(vp); 399 np->n_mtime = vattr.va_mtime.tv_sec; 400 } 401 } 402 np->n_attrstamp = 0; /* For Open/Close consistency */ 403 return (0); 404 } 405 406 /* 407 * nfs close vnode op 408 * What an NFS client should do upon close after writing is a debatable issue. 409 * Most NFS clients push delayed writes to the server upon close, basically for 410 * two reasons: 411 * 1 - So that any write errors may be reported back to the client process 412 * doing the close system call. By far the two most likely errors are 413 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 414 * 2 - To put a worst case upper bound on cache inconsistency between 415 * multiple clients for the file. 416 * There is also a consistency problem for Version 2 of the protocol w.r.t. 417 * not being able to tell if other clients are writing a file concurrently, 418 * since there is no way of knowing if the changed modify time in the reply 419 * is only due to the write for this client. 420 * (NFS Version 3 provides weak cache consistency data in the reply that 421 * should be sufficient to detect and handle this case.) 422 * 423 * The current code does the following: 424 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 425 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 426 * or commit them (this satisfies 1 and 2 except for the 427 * case where the server crashes after this close but 428 * before the commit RPC, which is felt to be "good 429 * enough". Changing the last argument to nfs_flush() to 430 * a 1 would force a commit operation, if it is felt a 431 * commit is necessary now. 432 */ 433 /* ARGSUSED */ 434 int 435 nfs_close(v) 436 void *v; 437 { 438 struct vop_close_args /* { 439 struct vnodeop_desc *a_desc; 440 struct vnode *a_vp; 441 int a_fflag; 442 struct ucred *a_cred; 443 struct proc *a_p; 444 } */ *ap = v; 445 register struct vnode *vp = ap->a_vp; 446 register struct nfsnode *np = VTONFS(vp); 447 int error = 0; 448 449 if (vp->v_type == VREG) { 450 if (np->n_flag & NMODIFIED) { 451 if (NFS_ISV3(vp)) { 452 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 453 np->n_flag &= ~NMODIFIED; 454 } else 455 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 456 np->n_attrstamp = 0; 457 } 458 if (np->n_flag & NWRITEERR) { 459 np->n_flag &= ~NWRITEERR; 460 error = np->n_error; 461 } 462 } 463 return (error); 464 } 465 466 /* 467 * nfs getattr call from vfs. 468 */ 469 int 470 nfs_getattr(v) 471 void *v; 472 { 473 struct vop_getattr_args /* { 474 struct vnode *a_vp; 475 struct vattr *a_vap; 476 struct ucred *a_cred; 477 struct proc *a_p; 478 } */ *ap = v; 479 register struct vnode *vp = ap->a_vp; 480 register struct nfsnode *np = VTONFS(vp); 481 register caddr_t cp; 482 register u_int32_t *tl; 483 register int32_t t1, t2; 484 caddr_t bpos, dpos; 485 int error = 0; 486 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 487 int v3 = NFS_ISV3(vp); 488 489 /* 490 * Update local times for special files. 491 */ 492 if (np->n_flag & (NACC | NUPD)) 493 np->n_flag |= NCHG; 494 /* 495 * First look in the cache. 496 */ 497 if (nfs_getattrcache(vp, ap->a_vap) == 0) 498 return (0); 499 nfsstats.rpccnt[NFSPROC_GETATTR]++; 500 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 501 nfsm_fhtom(vp, v3); 502 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 503 if (!error) 504 nfsm_loadattr(vp, ap->a_vap); 505 nfsm_reqdone; 506 return (error); 507 } 508 509 /* 510 * nfs setattr call. 511 */ 512 int 513 nfs_setattr(v) 514 void *v; 515 { 516 struct vop_setattr_args /* { 517 struct vnodeop_desc *a_desc; 518 struct vnode *a_vp; 519 struct vattr *a_vap; 520 struct ucred *a_cred; 521 struct proc *a_p; 522 } */ *ap = v; 523 register struct vnode *vp = ap->a_vp; 524 register struct nfsnode *np = VTONFS(vp); 525 register struct vattr *vap = ap->a_vap; 526 int error = 0; 527 u_quad_t tsize = 0; 528 529 /* 530 * Setting of flags is not supported. 531 */ 532 if (vap->va_flags != VNOVAL) 533 return (EOPNOTSUPP); 534 535 /* 536 * Disallow write attempts if the filesystem is mounted read-only. 537 */ 538 if ((vap->va_uid != (uid_t)VNOVAL || 539 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 540 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 541 (vp->v_mount->mnt_flag & MNT_RDONLY)) 542 return (EROFS); 543 if (vap->va_size != VNOVAL) { 544 switch (vp->v_type) { 545 case VDIR: 546 return (EISDIR); 547 case VCHR: 548 case VBLK: 549 case VSOCK: 550 case VFIFO: 551 if (vap->va_mtime.tv_sec == VNOVAL && 552 vap->va_atime.tv_sec == VNOVAL && 553 vap->va_mode == (mode_t)VNOVAL && 554 vap->va_uid == (uid_t)VNOVAL && 555 vap->va_gid == (gid_t)VNOVAL) 556 return (0); 557 vap->va_size = VNOVAL; 558 break; 559 default: 560 /* 561 * Disallow write attempts if the filesystem is 562 * mounted read-only. 563 */ 564 if (vp->v_mount->mnt_flag & MNT_RDONLY) 565 return (EROFS); 566 if (vap->va_size == 0) 567 error = nfs_vinvalbuf(vp, 0, 568 ap->a_cred, ap->a_p, 1); 569 else 570 error = nfs_vinvalbuf(vp, V_SAVE, 571 ap->a_cred, ap->a_p, 1); 572 if (error) 573 return (error); 574 tsize = np->n_size; 575 np->n_size = np->n_vattr.va_size = vap->va_size; 576 uvm_vnp_setsize(vp, np->n_size); 577 }; 578 } else if ((vap->va_mtime.tv_sec != VNOVAL || 579 vap->va_atime.tv_sec != VNOVAL) && 580 vp->v_type == VREG && 581 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 582 ap->a_p, 1)) == EINTR) 583 return (error); 584 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 585 if (error && vap->va_size != VNOVAL) { 586 np->n_size = np->n_vattr.va_size = tsize; 587 uvm_vnp_setsize(vp, np->n_size); 588 } 589 return (error); 590 } 591 592 /* 593 * Do an nfs setattr rpc. 594 */ 595 int 596 nfs_setattrrpc(vp, vap, cred, procp) 597 register struct vnode *vp; 598 register struct vattr *vap; 599 struct ucred *cred; 600 struct proc *procp; 601 { 602 register struct nfsv2_sattr *sp; 603 register caddr_t cp; 604 register int32_t t1, t2; 605 caddr_t bpos, dpos, cp2; 606 u_int32_t *tl; 607 int error = 0, wccflag = NFSV3_WCCRATTR; 608 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 609 int v3 = NFS_ISV3(vp); 610 611 nfsstats.rpccnt[NFSPROC_SETATTR]++; 612 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 613 nfsm_fhtom(vp, v3); 614 if (v3) { 615 nfsm_v3attrbuild(vap, TRUE); 616 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 617 *tl = nfs_false; 618 } else { 619 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 620 if (vap->va_mode == (mode_t)VNOVAL) 621 sp->sa_mode = nfs_xdrneg1; 622 else 623 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 624 if (vap->va_uid == (uid_t)VNOVAL) 625 sp->sa_uid = nfs_xdrneg1; 626 else 627 sp->sa_uid = txdr_unsigned(vap->va_uid); 628 if (vap->va_gid == (gid_t)VNOVAL) 629 sp->sa_gid = nfs_xdrneg1; 630 else 631 sp->sa_gid = txdr_unsigned(vap->va_gid); 632 sp->sa_size = txdr_unsigned(vap->va_size); 633 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 634 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 635 } 636 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 637 if (v3) { 638 nfsm_wcc_data(vp, wccflag); 639 } else 640 nfsm_loadattr(vp, (struct vattr *)0); 641 nfsm_reqdone; 642 return (error); 643 } 644 645 /* 646 * nfs lookup call, one step at a time... 647 * First look in cache 648 * If not found, unlock the directory nfsnode and do the rpc 649 */ 650 int 651 nfs_lookup(v) 652 void *v; 653 { 654 struct vop_lookup_args /* { 655 struct vnodeop_desc *a_desc; 656 struct vnode *a_dvp; 657 struct vnode **a_vpp; 658 struct componentname *a_cnp; 659 } */ *ap = v; 660 register struct componentname *cnp = ap->a_cnp; 661 register struct vnode *dvp = ap->a_dvp; 662 register struct vnode **vpp = ap->a_vpp; 663 struct proc *p = cnp->cn_proc; 664 register int flags = cnp->cn_flags; 665 register struct vnode *newvp; 666 register u_int32_t *tl; 667 register caddr_t cp; 668 register int32_t t1, t2; 669 struct nfsmount *nmp; 670 caddr_t bpos, dpos, cp2; 671 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 672 long len; 673 nfsfh_t *fhp; 674 struct nfsnode *np; 675 int lockparent, wantparent, error = 0, attrflag, fhsize; 676 int v3 = NFS_ISV3(dvp); 677 678 *vpp = NULLVP; 679 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 680 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 681 return (EROFS); 682 if (dvp->v_type != VDIR) 683 return (ENOTDIR); 684 lockparent = flags & LOCKPARENT; 685 wantparent = flags & (LOCKPARENT|WANTPARENT); 686 nmp = VFSTONFS(dvp->v_mount); 687 np = VTONFS(dvp); 688 if ((error = cache_lookup(dvp, vpp, cnp)) != 0 && error != ENOENT) { 689 struct vattr vattr; 690 int vpid; 691 692 newvp = *vpp; 693 vpid = newvp->v_id; 694 /* 695 * See the comment starting `Step through' in ufs/ufs_lookup.c 696 * for an explanation of the locking protocol 697 */ 698 if (dvp == newvp) { 699 VREF(newvp); 700 error = 0; 701 } else 702 error = vget(newvp, LK_EXCLUSIVE, p); 703 704 if (!error) { 705 if (vpid == newvp->v_id) { 706 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 707 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 708 nfsstats.lookupcache_hits++; 709 if (cnp->cn_nameiop != LOOKUP && 710 (flags & ISLASTCN)) 711 cnp->cn_flags |= SAVENAME; 712 return (0); 713 } 714 cache_purge(newvp); 715 } 716 vrele(newvp); 717 } 718 *vpp = NULLVP; 719 } 720 error = 0; 721 newvp = NULLVP; 722 nfsstats.lookupcache_misses++; 723 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 724 len = cnp->cn_namelen; 725 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 726 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 727 nfsm_fhtom(dvp, v3); 728 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 729 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 730 if (error) { 731 nfsm_postop_attr(dvp, attrflag); 732 m_freem(mrep); 733 goto nfsmout; 734 } 735 nfsm_getfh(fhp, fhsize, v3); 736 737 /* 738 * Handle RENAME case... 739 */ 740 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 741 if (NFS_CMPFH(np, fhp, fhsize)) { 742 m_freem(mrep); 743 return (EISDIR); 744 } 745 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 746 if (error) { 747 m_freem(mrep); 748 return (error); 749 } 750 newvp = NFSTOV(np); 751 if (v3) { 752 nfsm_postop_attr(newvp, attrflag); 753 nfsm_postop_attr(dvp, attrflag); 754 } else 755 nfsm_loadattr(newvp, (struct vattr *)0); 756 *vpp = newvp; 757 m_freem(mrep); 758 cnp->cn_flags |= SAVENAME; 759 return (0); 760 } 761 762 if (NFS_CMPFH(np, fhp, fhsize)) { 763 VREF(dvp); 764 newvp = dvp; 765 } else { 766 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 767 if (error) { 768 m_freem(mrep); 769 return (error); 770 } 771 newvp = NFSTOV(np); 772 } 773 if (v3) { 774 nfsm_postop_attr(newvp, attrflag); 775 nfsm_postop_attr(dvp, attrflag); 776 } else 777 nfsm_loadattr(newvp, (struct vattr *)0); 778 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 779 cnp->cn_flags |= SAVENAME; 780 if ((cnp->cn_flags & MAKEENTRY) && 781 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 782 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 783 cache_enter(dvp, newvp, cnp); 784 } 785 *vpp = newvp; 786 nfsm_reqdone; 787 if (error) { 788 if (newvp != NULLVP) 789 vrele(newvp); 790 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 791 (flags & ISLASTCN) && error == ENOENT) { 792 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 793 error = EROFS; 794 else 795 error = EJUSTRETURN; 796 } 797 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 798 cnp->cn_flags |= SAVENAME; 799 } 800 return (error); 801 } 802 803 /* 804 * nfs read call. 805 * Just call nfs_bioread() to do the work. 806 */ 807 int 808 nfs_read(v) 809 void *v; 810 { 811 struct vop_read_args /* { 812 struct vnode *a_vp; 813 struct uio *a_uio; 814 int a_ioflag; 815 struct ucred *a_cred; 816 } */ *ap = v; 817 register struct vnode *vp = ap->a_vp; 818 819 if (vp->v_type != VREG) 820 return (EPERM); 821 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 822 } 823 824 /* 825 * nfs readlink call 826 */ 827 int 828 nfs_readlink(v) 829 void *v; 830 { 831 struct vop_readlink_args /* { 832 struct vnode *a_vp; 833 struct uio *a_uio; 834 struct ucred *a_cred; 835 } */ *ap = v; 836 register struct vnode *vp = ap->a_vp; 837 838 if (vp->v_type != VLNK) 839 return (EPERM); 840 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); 841 } 842 843 /* 844 * Do a readlink rpc. 845 * Called by nfs_doio() from below the buffer cache. 846 */ 847 int 848 nfs_readlinkrpc(vp, uiop, cred) 849 register struct vnode *vp; 850 struct uio *uiop; 851 struct ucred *cred; 852 { 853 register u_int32_t *tl; 854 register caddr_t cp; 855 register int32_t t1, t2; 856 caddr_t bpos, dpos, cp2; 857 int error = 0, len, attrflag; 858 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 859 int v3 = NFS_ISV3(vp); 860 861 nfsstats.rpccnt[NFSPROC_READLINK]++; 862 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 863 nfsm_fhtom(vp, v3); 864 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 865 if (v3) 866 nfsm_postop_attr(vp, attrflag); 867 if (!error) { 868 nfsm_strsiz(len, NFS_MAXPATHLEN); 869 nfsm_mtouio(uiop, len); 870 } 871 nfsm_reqdone; 872 return (error); 873 } 874 875 /* 876 * nfs read rpc call 877 * Ditto above 878 */ 879 int 880 nfs_readrpc(vp, uiop, cred) 881 register struct vnode *vp; 882 struct uio *uiop; 883 struct ucred *cred; 884 { 885 register u_int32_t *tl; 886 register caddr_t cp; 887 register int32_t t1, t2; 888 caddr_t bpos, dpos, cp2; 889 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 890 struct nfsmount *nmp; 891 int error = 0, len, retlen, tsiz, eof, attrflag; 892 int v3 = NFS_ISV3(vp); 893 894 #ifndef nolint 895 eof = 0; 896 #endif 897 nmp = VFSTONFS(vp->v_mount); 898 tsiz = uiop->uio_resid; 899 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 900 return (EFBIG); 901 while (tsiz > 0) { 902 nfsstats.rpccnt[NFSPROC_READ]++; 903 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 904 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 905 nfsm_fhtom(vp, v3); 906 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 907 if (v3) { 908 txdr_hyper(uiop->uio_offset, tl); 909 *(tl + 2) = txdr_unsigned(len); 910 } else { 911 *tl++ = txdr_unsigned(uiop->uio_offset); 912 *tl++ = txdr_unsigned(len); 913 *tl = 0; 914 } 915 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 916 if (v3) { 917 nfsm_postop_attr(vp, attrflag); 918 if (error) { 919 m_freem(mrep); 920 goto nfsmout; 921 } 922 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 923 eof = fxdr_unsigned(int, *(tl + 1)); 924 } else 925 nfsm_loadattr(vp, (struct vattr *)0); 926 nfsm_strsiz(retlen, nmp->nm_rsize); 927 nfsm_mtouio(uiop, retlen); 928 m_freem(mrep); 929 tsiz -= retlen; 930 if (v3) { 931 if (eof || retlen == 0) 932 tsiz = 0; 933 } else if (retlen < len) 934 tsiz = 0; 935 } 936 nfsmout: 937 return (error); 938 } 939 940 /* 941 * nfs write call 942 */ 943 int 944 nfs_writerpc(vp, uiop, cred, iomode, must_commit) 945 register struct vnode *vp; 946 register struct uio *uiop; 947 struct ucred *cred; 948 int *iomode, *must_commit; 949 { 950 register u_int32_t *tl; 951 register caddr_t cp; 952 register int32_t t1, t2, backup; 953 caddr_t bpos, dpos, cp2; 954 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 955 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 956 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 957 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 958 959 #ifndef DIAGNOSTIC 960 if (uiop->uio_iovcnt != 1) 961 panic("nfs: writerpc iovcnt > 1"); 962 #endif 963 *must_commit = 0; 964 tsiz = uiop->uio_resid; 965 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 966 return (EFBIG); 967 while (tsiz > 0) { 968 nfsstats.rpccnt[NFSPROC_WRITE]++; 969 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 970 nfsm_reqhead(vp, NFSPROC_WRITE, 971 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 972 nfsm_fhtom(vp, v3); 973 if (v3) { 974 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 975 txdr_hyper(uiop->uio_offset, tl); 976 tl += 2; 977 *tl++ = txdr_unsigned(len); 978 *tl++ = txdr_unsigned(*iomode); 979 *tl = txdr_unsigned(len); 980 } else { 981 register u_int32_t x; 982 983 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 984 /* Set both "begin" and "current" to non-garbage. */ 985 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 986 *tl++ = x; /* "begin offset" */ 987 *tl++ = x; /* "current offset" */ 988 x = txdr_unsigned(len); 989 *tl++ = x; /* total to this offset */ 990 *tl = x; /* size of this write */ 991 992 } 993 nfsm_uiotom(uiop, len); 994 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 995 if (v3) { 996 wccflag = NFSV3_WCCCHK; 997 nfsm_wcc_data(vp, wccflag); 998 if (!error) { 999 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1000 + NFSX_V3WRITEVERF); 1001 rlen = fxdr_unsigned(int, *tl++); 1002 if (rlen == 0) { 1003 error = NFSERR_IO; 1004 break; 1005 } else if (rlen < len) { 1006 backup = len - rlen; 1007 uiop->uio_iov->iov_base -= backup; 1008 uiop->uio_iov->iov_len += backup; 1009 uiop->uio_offset -= backup; 1010 uiop->uio_resid += backup; 1011 len = rlen; 1012 } 1013 commit = fxdr_unsigned(int, *tl++); 1014 1015 /* 1016 * Return the lowest committment level 1017 * obtained by any of the RPCs. 1018 */ 1019 if (committed == NFSV3WRITE_FILESYNC) 1020 committed = commit; 1021 else if (committed == NFSV3WRITE_DATASYNC && 1022 commit == NFSV3WRITE_UNSTABLE) 1023 committed = commit; 1024 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) { 1025 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1026 NFSX_V3WRITEVERF); 1027 nmp->nm_flag |= NFSMNT_HASWRITEVERF; 1028 } else if (bcmp((caddr_t)tl, 1029 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1030 *must_commit = 1; 1031 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1032 NFSX_V3WRITEVERF); 1033 } 1034 } 1035 } else 1036 nfsm_loadattr(vp, (struct vattr *)0); 1037 if (wccflag) 1038 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec; 1039 m_freem(mrep); 1040 tsiz -= len; 1041 } 1042 nfsmout: 1043 *iomode = committed; 1044 if (error) 1045 uiop->uio_resid = tsiz; 1046 return (error); 1047 } 1048 1049 /* 1050 * nfs mknod rpc 1051 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1052 * mode set to specify the file type and the size field for rdev. 1053 */ 1054 int 1055 nfs_mknodrpc(dvp, vpp, cnp, vap) 1056 register struct vnode *dvp; 1057 register struct vnode **vpp; 1058 register struct componentname *cnp; 1059 register struct vattr *vap; 1060 { 1061 register struct nfsv2_sattr *sp; 1062 register u_int32_t *tl; 1063 register caddr_t cp; 1064 register int32_t t1, t2; 1065 struct vnode *newvp = (struct vnode *)0; 1066 struct nfsnode *np; 1067 char *cp2; 1068 caddr_t bpos, dpos; 1069 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1070 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1071 u_int32_t rdev; 1072 int v3 = NFS_ISV3(dvp); 1073 1074 if (vap->va_type == VCHR || vap->va_type == VBLK) 1075 rdev = txdr_unsigned(vap->va_rdev); 1076 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1077 rdev = nfs_xdrneg1; 1078 else { 1079 VOP_ABORTOP(dvp, cnp); 1080 vput(dvp); 1081 return (EOPNOTSUPP); 1082 } 1083 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1084 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1085 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1086 nfsm_fhtom(dvp, v3); 1087 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1088 if (v3) { 1089 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1090 *tl++ = vtonfsv3_type(vap->va_type); 1091 nfsm_v3attrbuild(vap, FALSE); 1092 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1093 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1094 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1095 *tl = txdr_unsigned(minor(vap->va_rdev)); 1096 } 1097 } else { 1098 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1099 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1100 sp->sa_uid = nfs_xdrneg1; 1101 sp->sa_gid = nfs_xdrneg1; 1102 sp->sa_size = rdev; 1103 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1104 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1105 } 1106 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1107 if (!error) { 1108 nfsm_mtofh(dvp, newvp, v3, gotvp); 1109 if (!gotvp) { 1110 if (newvp) { 1111 vrele(newvp); 1112 newvp = (struct vnode *)0; 1113 } 1114 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1115 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1116 if (!error) 1117 newvp = NFSTOV(np); 1118 } 1119 } 1120 if (v3) 1121 nfsm_wcc_data(dvp, wccflag); 1122 nfsm_reqdone; 1123 if (error) { 1124 if (newvp) 1125 vrele(newvp); 1126 } else { 1127 if (cnp->cn_flags & MAKEENTRY) 1128 cache_enter(dvp, newvp, cnp); 1129 *vpp = newvp; 1130 } 1131 FREE(cnp->cn_pnbuf, M_NAMEI); 1132 VTONFS(dvp)->n_flag |= NMODIFIED; 1133 if (!wccflag) 1134 VTONFS(dvp)->n_attrstamp = 0; 1135 vrele(dvp); 1136 return (error); 1137 } 1138 1139 /* 1140 * nfs mknod vop 1141 * just call nfs_mknodrpc() to do the work. 1142 */ 1143 /* ARGSUSED */ 1144 int 1145 nfs_mknod(v) 1146 void *v; 1147 { 1148 struct vop_mknod_args /* { 1149 struct vnode *a_dvp; 1150 struct vnode **a_vpp; 1151 struct componentname *a_cnp; 1152 struct vattr *a_vap; 1153 } */ *ap = v; 1154 struct vnode *newvp; 1155 int error; 1156 1157 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1158 if (!error) 1159 vrele(newvp); 1160 return (error); 1161 } 1162 1163 static u_long create_verf; 1164 /* 1165 * nfs file create call 1166 */ 1167 int 1168 nfs_create(v) 1169 void *v; 1170 { 1171 struct vop_create_args /* { 1172 struct vnode *a_dvp; 1173 struct vnode **a_vpp; 1174 struct componentname *a_cnp; 1175 struct vattr *a_vap; 1176 } */ *ap = v; 1177 register struct vnode *dvp = ap->a_dvp; 1178 register struct vattr *vap = ap->a_vap; 1179 register struct componentname *cnp = ap->a_cnp; 1180 register struct nfsv2_sattr *sp; 1181 register u_int32_t *tl; 1182 register caddr_t cp; 1183 register int32_t t1, t2; 1184 struct nfsnode *np = (struct nfsnode *)0; 1185 struct vnode *newvp = (struct vnode *)0; 1186 caddr_t bpos, dpos, cp2; 1187 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1188 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1189 int v3 = NFS_ISV3(dvp); 1190 1191 /* 1192 * Oops, not for me.. 1193 */ 1194 if (vap->va_type == VSOCK) 1195 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1196 1197 #ifdef VA_EXCLUSIVE 1198 if (vap->va_vaflags & VA_EXCLUSIVE) 1199 fmode |= O_EXCL; 1200 #endif 1201 again: 1202 nfsstats.rpccnt[NFSPROC_CREATE]++; 1203 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1204 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1205 nfsm_fhtom(dvp, v3); 1206 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1207 if (v3) { 1208 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1209 if (fmode & O_EXCL) { 1210 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1211 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1212 if (in_ifaddr.tqh_first) 1213 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1214 else 1215 *tl++ = create_verf; 1216 *tl = ++create_verf; 1217 } else { 1218 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1219 nfsm_v3attrbuild(vap, FALSE); 1220 } 1221 } else { 1222 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1223 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1224 sp->sa_uid = nfs_xdrneg1; 1225 sp->sa_gid = nfs_xdrneg1; 1226 sp->sa_size = 0; 1227 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1228 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1229 } 1230 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1231 if (!error) { 1232 nfsm_mtofh(dvp, newvp, v3, gotvp); 1233 if (!gotvp) { 1234 if (newvp) { 1235 vrele(newvp); 1236 newvp = (struct vnode *)0; 1237 } 1238 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1239 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1240 if (!error) 1241 newvp = NFSTOV(np); 1242 } 1243 } 1244 if (v3) 1245 nfsm_wcc_data(dvp, wccflag); 1246 nfsm_reqdone; 1247 if (error) { 1248 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1249 fmode &= ~O_EXCL; 1250 goto again; 1251 } 1252 if (newvp) 1253 vrele(newvp); 1254 } else if (v3 && (fmode & O_EXCL)) 1255 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1256 if (!error) { 1257 if (cnp->cn_flags & MAKEENTRY) 1258 cache_enter(dvp, newvp, cnp); 1259 *ap->a_vpp = newvp; 1260 } 1261 FREE(cnp->cn_pnbuf, M_NAMEI); 1262 VTONFS(dvp)->n_flag |= NMODIFIED; 1263 if (!wccflag) 1264 VTONFS(dvp)->n_attrstamp = 0; 1265 vrele(dvp); 1266 return (error); 1267 } 1268 1269 /* 1270 * nfs file remove call 1271 * To try and make nfs semantics closer to ufs semantics, a file that has 1272 * other processes using the vnode is renamed instead of removed and then 1273 * removed later on the last close. 1274 * - If v_usecount > 1 1275 * If a rename is not already in the works 1276 * call nfs_sillyrename() to set it up 1277 * else 1278 * do the remove rpc 1279 */ 1280 int 1281 nfs_remove(v) 1282 void *v; 1283 { 1284 struct vop_remove_args /* { 1285 struct vnodeop_desc *a_desc; 1286 struct vnode * a_dvp; 1287 struct vnode * a_vp; 1288 struct componentname * a_cnp; 1289 } */ *ap = v; 1290 register struct vnode *vp = ap->a_vp; 1291 register struct vnode *dvp = ap->a_dvp; 1292 register struct componentname *cnp = ap->a_cnp; 1293 register struct nfsnode *np = VTONFS(vp); 1294 int error = 0; 1295 struct vattr vattr; 1296 1297 #ifndef DIAGNOSTIC 1298 if ((cnp->cn_flags & HASBUF) == 0) 1299 panic("nfs_remove: no name"); 1300 if (vp->v_usecount < 1) 1301 panic("nfs_remove: bad v_usecount"); 1302 #endif 1303 if (vp->v_type == VDIR) 1304 error = EPERM; 1305 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1306 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1307 vattr.va_nlink > 1)) { 1308 /* 1309 * Purge the name cache so that the chance of a lookup for 1310 * the name succeeding while the remove is in progress is 1311 * minimized. Without node locking it can still happen, such 1312 * that an I/O op returns ESTALE, but since you get this if 1313 * another host removes the file.. 1314 */ 1315 cache_purge(vp); 1316 /* 1317 * throw away biocache buffers, mainly to avoid 1318 * unnecessary delayed writes later. 1319 */ 1320 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1321 /* Do the rpc */ 1322 if (error != EINTR) 1323 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1324 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1325 /* 1326 * Kludge City: If the first reply to the remove rpc is lost.. 1327 * the reply to the retransmitted request will be ENOENT 1328 * since the file was in fact removed 1329 * Therefore, we cheat and return success. 1330 */ 1331 if (error == ENOENT) 1332 error = 0; 1333 } else if (!np->n_sillyrename) 1334 error = nfs_sillyrename(dvp, vp, cnp); 1335 FREE(cnp->cn_pnbuf, M_NAMEI); 1336 np->n_attrstamp = 0; 1337 vrele(dvp); 1338 vrele(vp); 1339 return (error); 1340 } 1341 1342 /* 1343 * nfs file remove rpc called from nfs_inactive 1344 */ 1345 int 1346 nfs_removeit(sp) 1347 register struct sillyrename *sp; 1348 { 1349 1350 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1351 (struct proc *)0)); 1352 } 1353 1354 /* 1355 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1356 */ 1357 int 1358 nfs_removerpc(dvp, name, namelen, cred, proc) 1359 register struct vnode *dvp; 1360 char *name; 1361 int namelen; 1362 struct ucred *cred; 1363 struct proc *proc; 1364 { 1365 register u_int32_t *tl; 1366 register caddr_t cp; 1367 register int32_t t1, t2; 1368 caddr_t bpos, dpos, cp2; 1369 int error = 0, wccflag = NFSV3_WCCRATTR; 1370 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1371 int v3 = NFS_ISV3(dvp); 1372 1373 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1374 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1375 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1376 nfsm_fhtom(dvp, v3); 1377 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1378 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1379 if (v3) 1380 nfsm_wcc_data(dvp, wccflag); 1381 nfsm_reqdone; 1382 VTONFS(dvp)->n_flag |= NMODIFIED; 1383 if (!wccflag) 1384 VTONFS(dvp)->n_attrstamp = 0; 1385 return (error); 1386 } 1387 1388 /* 1389 * nfs file rename call 1390 */ 1391 int 1392 nfs_rename(v) 1393 void *v; 1394 { 1395 struct vop_rename_args /* { 1396 struct vnode *a_fdvp; 1397 struct vnode *a_fvp; 1398 struct componentname *a_fcnp; 1399 struct vnode *a_tdvp; 1400 struct vnode *a_tvp; 1401 struct componentname *a_tcnp; 1402 } */ *ap = v; 1403 register struct vnode *fvp = ap->a_fvp; 1404 register struct vnode *tvp = ap->a_tvp; 1405 register struct vnode *fdvp = ap->a_fdvp; 1406 register struct vnode *tdvp = ap->a_tdvp; 1407 register struct componentname *tcnp = ap->a_tcnp; 1408 register struct componentname *fcnp = ap->a_fcnp; 1409 int error; 1410 1411 #ifndef DIAGNOSTIC 1412 if ((tcnp->cn_flags & HASBUF) == 0 || 1413 (fcnp->cn_flags & HASBUF) == 0) 1414 panic("nfs_rename: no name"); 1415 #endif 1416 /* Check for cross-device rename */ 1417 if ((fvp->v_mount != tdvp->v_mount) || 1418 (tvp && (fvp->v_mount != tvp->v_mount))) { 1419 error = EXDEV; 1420 goto out; 1421 } 1422 1423 /* 1424 * If the tvp exists and is in use, sillyrename it before doing the 1425 * rename of the new file over it. 1426 */ 1427 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1428 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1429 vrele(tvp); 1430 tvp = NULL; 1431 } 1432 1433 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1434 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1435 tcnp->cn_proc); 1436 1437 if (fvp->v_type == VDIR) { 1438 if (tvp != NULL && tvp->v_type == VDIR) 1439 cache_purge(tdvp); 1440 cache_purge(fdvp); 1441 } 1442 out: 1443 if (tdvp == tvp) 1444 vrele(tdvp); 1445 else 1446 vput(tdvp); 1447 if (tvp) 1448 vput(tvp); 1449 vrele(fdvp); 1450 vrele(fvp); 1451 /* 1452 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1453 */ 1454 if (error == ENOENT) 1455 error = 0; 1456 return (error); 1457 } 1458 1459 /* 1460 * nfs file rename rpc called from nfs_remove() above 1461 */ 1462 int 1463 nfs_renameit(sdvp, scnp, sp) 1464 struct vnode *sdvp; 1465 struct componentname *scnp; 1466 register struct sillyrename *sp; 1467 { 1468 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1469 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1470 } 1471 1472 /* 1473 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1474 */ 1475 int 1476 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1477 register struct vnode *fdvp; 1478 char *fnameptr; 1479 int fnamelen; 1480 register struct vnode *tdvp; 1481 char *tnameptr; 1482 int tnamelen; 1483 struct ucred *cred; 1484 struct proc *proc; 1485 { 1486 register u_int32_t *tl; 1487 register caddr_t cp; 1488 register int32_t t1, t2; 1489 caddr_t bpos, dpos, cp2; 1490 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1491 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1492 int v3 = NFS_ISV3(fdvp); 1493 1494 nfsstats.rpccnt[NFSPROC_RENAME]++; 1495 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1496 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1497 nfsm_rndup(tnamelen)); 1498 nfsm_fhtom(fdvp, v3); 1499 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1500 nfsm_fhtom(tdvp, v3); 1501 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1502 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1503 if (v3) { 1504 nfsm_wcc_data(fdvp, fwccflag); 1505 nfsm_wcc_data(tdvp, twccflag); 1506 } 1507 nfsm_reqdone; 1508 VTONFS(fdvp)->n_flag |= NMODIFIED; 1509 VTONFS(tdvp)->n_flag |= NMODIFIED; 1510 if (!fwccflag) 1511 VTONFS(fdvp)->n_attrstamp = 0; 1512 if (!twccflag) 1513 VTONFS(tdvp)->n_attrstamp = 0; 1514 return (error); 1515 } 1516 1517 /* 1518 * nfs hard link create call 1519 */ 1520 int 1521 nfs_link(v) 1522 void *v; 1523 { 1524 struct vop_link_args /* { 1525 struct vnode *a_dvp; 1526 struct vnode *a_vp; 1527 struct componentname *a_cnp; 1528 } */ *ap = v; 1529 register struct vnode *vp = ap->a_vp; 1530 register struct vnode *dvp = ap->a_dvp; 1531 register struct componentname *cnp = ap->a_cnp; 1532 register u_int32_t *tl; 1533 register caddr_t cp; 1534 register int32_t t1, t2; 1535 caddr_t bpos, dpos, cp2; 1536 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1537 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1538 int v3 = NFS_ISV3(vp); 1539 1540 1541 if (dvp->v_mount != vp->v_mount) { 1542 FREE(cnp->cn_pnbuf, M_NAMEI); 1543 if (vp == dvp) 1544 vrele(dvp); 1545 else 1546 vput(dvp); 1547 return (EXDEV); 1548 } 1549 1550 /* 1551 * Push all writes to the server, so that the attribute cache 1552 * doesn't get "out of sync" with the server. 1553 * XXX There should be a better way! 1554 */ 1555 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc); 1556 1557 nfsstats.rpccnt[NFSPROC_LINK]++; 1558 nfsm_reqhead(vp, NFSPROC_LINK, 1559 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1560 nfsm_fhtom(vp, v3); 1561 nfsm_fhtom(dvp, v3); 1562 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1563 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1564 if (v3) { 1565 nfsm_postop_attr(vp, attrflag); 1566 nfsm_wcc_data(dvp, wccflag); 1567 } 1568 nfsm_reqdone; 1569 FREE(cnp->cn_pnbuf, M_NAMEI); 1570 VTONFS(dvp)->n_flag |= NMODIFIED; 1571 if (!attrflag) 1572 VTONFS(vp)->n_attrstamp = 0; 1573 if (!wccflag) 1574 VTONFS(dvp)->n_attrstamp = 0; 1575 vput(dvp); 1576 /* 1577 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1578 */ 1579 if (error == EEXIST) 1580 error = 0; 1581 return (error); 1582 } 1583 1584 /* 1585 * nfs symbolic link create call 1586 */ 1587 int 1588 nfs_symlink(v) 1589 void *v; 1590 { 1591 struct vop_symlink_args /* { 1592 struct vnode *a_dvp; 1593 struct vnode **a_vpp; 1594 struct componentname *a_cnp; 1595 struct vattr *a_vap; 1596 char *a_target; 1597 } */ *ap = v; 1598 register struct vnode *dvp = ap->a_dvp; 1599 register struct vattr *vap = ap->a_vap; 1600 register struct componentname *cnp = ap->a_cnp; 1601 register struct nfsv2_sattr *sp; 1602 register u_int32_t *tl; 1603 register caddr_t cp; 1604 register int32_t t1, t2; 1605 caddr_t bpos, dpos, cp2; 1606 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1607 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1608 struct vnode *newvp = (struct vnode *)0; 1609 int v3 = NFS_ISV3(dvp); 1610 1611 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1612 slen = strlen(ap->a_target); 1613 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1614 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1615 nfsm_fhtom(dvp, v3); 1616 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1617 if (v3) 1618 nfsm_v3attrbuild(vap, FALSE); 1619 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1620 if (!v3) { 1621 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1622 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1623 sp->sa_uid = nfs_xdrneg1; 1624 sp->sa_gid = nfs_xdrneg1; 1625 sp->sa_size = nfs_xdrneg1; 1626 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1627 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1628 } 1629 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1630 if (v3) { 1631 if (!error) 1632 nfsm_mtofh(dvp, newvp, v3, gotvp); 1633 nfsm_wcc_data(dvp, wccflag); 1634 } 1635 nfsm_reqdone; 1636 if (newvp) 1637 vrele(newvp); 1638 FREE(cnp->cn_pnbuf, M_NAMEI); 1639 VTONFS(dvp)->n_flag |= NMODIFIED; 1640 if (!wccflag) 1641 VTONFS(dvp)->n_attrstamp = 0; 1642 vrele(dvp); 1643 /* 1644 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1645 */ 1646 if (error == EEXIST) 1647 error = 0; 1648 return (error); 1649 } 1650 1651 /* 1652 * nfs make dir call 1653 */ 1654 int 1655 nfs_mkdir(v) 1656 void *v; 1657 { 1658 struct vop_mkdir_args /* { 1659 struct vnode *a_dvp; 1660 struct vnode **a_vpp; 1661 struct componentname *a_cnp; 1662 struct vattr *a_vap; 1663 } */ *ap = v; 1664 register struct vnode *dvp = ap->a_dvp; 1665 register struct vattr *vap = ap->a_vap; 1666 register struct componentname *cnp = ap->a_cnp; 1667 register struct nfsv2_sattr *sp; 1668 register u_int32_t *tl; 1669 register caddr_t cp; 1670 register int32_t t1, t2; 1671 register int len; 1672 struct nfsnode *np = (struct nfsnode *)0; 1673 struct vnode *newvp = (struct vnode *)0; 1674 caddr_t bpos, dpos, cp2; 1675 int error = 0, wccflag = NFSV3_WCCRATTR; 1676 int gotvp = 0; 1677 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1678 int v3 = NFS_ISV3(dvp); 1679 1680 len = cnp->cn_namelen; 1681 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1682 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1683 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1684 nfsm_fhtom(dvp, v3); 1685 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1686 if (v3) { 1687 nfsm_v3attrbuild(vap, FALSE); 1688 } else { 1689 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1690 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1691 sp->sa_uid = nfs_xdrneg1; 1692 sp->sa_gid = nfs_xdrneg1; 1693 sp->sa_size = nfs_xdrneg1; 1694 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1695 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1696 } 1697 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1698 if (!error) 1699 nfsm_mtofh(dvp, newvp, v3, gotvp); 1700 if (v3) 1701 nfsm_wcc_data(dvp, wccflag); 1702 nfsm_reqdone; 1703 VTONFS(dvp)->n_flag |= NMODIFIED; 1704 if (!wccflag) 1705 VTONFS(dvp)->n_attrstamp = 0; 1706 /* 1707 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1708 * if we can succeed in looking up the directory. 1709 */ 1710 if (error == EEXIST || (!error && !gotvp)) { 1711 if (newvp) { 1712 vrele(newvp); 1713 newvp = (struct vnode *)0; 1714 } 1715 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1716 cnp->cn_proc, &np); 1717 if (!error) { 1718 newvp = NFSTOV(np); 1719 if (newvp->v_type != VDIR) 1720 error = EEXIST; 1721 } 1722 } 1723 if (error) { 1724 if (newvp) 1725 vrele(newvp); 1726 } else 1727 *ap->a_vpp = newvp; 1728 FREE(cnp->cn_pnbuf, M_NAMEI); 1729 vrele(dvp); 1730 return (error); 1731 } 1732 1733 /* 1734 * nfs remove directory call 1735 */ 1736 int 1737 nfs_rmdir(v) 1738 void *v; 1739 { 1740 struct vop_rmdir_args /* { 1741 struct vnode *a_dvp; 1742 struct vnode *a_vp; 1743 struct componentname *a_cnp; 1744 } */ *ap = v; 1745 register struct vnode *vp = ap->a_vp; 1746 register struct vnode *dvp = ap->a_dvp; 1747 register struct componentname *cnp = ap->a_cnp; 1748 register u_int32_t *tl; 1749 register caddr_t cp; 1750 register int32_t t1, t2; 1751 caddr_t bpos, dpos, cp2; 1752 int error = 0, wccflag = NFSV3_WCCRATTR; 1753 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1754 int v3 = NFS_ISV3(dvp); 1755 1756 if (dvp == vp) { 1757 vrele(dvp); 1758 vrele(dvp); 1759 FREE(cnp->cn_pnbuf, M_NAMEI); 1760 return (EINVAL); 1761 } 1762 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1763 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1764 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1765 nfsm_fhtom(dvp, v3); 1766 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1767 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1768 if (v3) 1769 nfsm_wcc_data(dvp, wccflag); 1770 nfsm_reqdone; 1771 FREE(cnp->cn_pnbuf, M_NAMEI); 1772 VTONFS(dvp)->n_flag |= NMODIFIED; 1773 if (!wccflag) 1774 VTONFS(dvp)->n_attrstamp = 0; 1775 cache_purge(dvp); 1776 cache_purge(vp); 1777 vrele(vp); 1778 vrele(dvp); 1779 /* 1780 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1781 */ 1782 if (error == ENOENT) 1783 error = 0; 1784 return (error); 1785 } 1786 1787 1788 /* 1789 * The readdir logic below has a big design bug. It stores the NFS cookie in 1790 * the returned uio->uio_offset but does not store the verifier (it cannot). 1791 * Instead, the code stores the verifier in the nfsnode and applies that 1792 * verifies to all cookies, no matter what verifier was originally with 1793 * the cookie. 1794 * 1795 * From a practical standpoint, this is not a problem since almost all 1796 * NFS servers do not change the validity of cookies across deletes 1797 * and inserts. 1798 */ 1799 1800 struct nfs_dirent { 1801 u_int32_t cookie[2]; 1802 struct dirent dirent; 1803 }; 1804 1805 #define NFS_DIRHDSIZ (sizeof (struct nfs_dirent) - (MAXNAMLEN + 1)) 1806 #define NFS_DIRENT_OVERHEAD offsetof(struct nfs_dirent, dirent) 1807 1808 /* 1809 * nfs readdir call 1810 */ 1811 int 1812 nfs_readdir(v) 1813 void *v; 1814 { 1815 struct vop_readdir_args /* { 1816 struct vnode *a_vp; 1817 struct uio *a_uio; 1818 struct ucred *a_cred; 1819 int *a_eofflag; 1820 u_long **a_cookies; 1821 int *a_ncookies; 1822 } */ *ap = v; 1823 struct vnode *vp = ap->a_vp; 1824 struct nfsnode *np = VTONFS(vp); 1825 struct uio *uio = ap->a_uio; 1826 int tresid, error; 1827 struct vattr vattr; 1828 u_long *cookies = NULL; 1829 int ncookies = 0, cnt; 1830 u_int64_t newoff = uio->uio_offset; 1831 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1832 struct uio readdir_uio; 1833 struct iovec readdir_iovec; 1834 struct proc * p = uio->uio_procp; 1835 int done = 0, eof = 0; 1836 struct ucred *cred = ap->a_cred; 1837 void *data; 1838 1839 if (vp->v_type != VDIR) 1840 return (EPERM); 1841 /* 1842 * First, check for hit on the EOF offset cache 1843 */ 1844 if (np->n_direofoffset != 0 && 1845 uio->uio_offset == np->n_direofoffset) { 1846 if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 && 1847 np->n_mtime == vattr.va_mtime.tv_sec) { 1848 nfsstats.direofcache_hits++; 1849 *ap->a_eofflag = 1; 1850 return (0); 1851 } 1852 } 1853 1854 if (uio->uio_resid < NFS_FABLKSIZE) 1855 return (EINVAL); 1856 1857 tresid = uio->uio_resid; 1858 1859 if (uio->uio_rw != UIO_READ) 1860 return (EINVAL); 1861 1862 if (ap->a_cookies) { 1863 ncookies = uio->uio_resid / 20; 1864 1865 MALLOC(cookies, u_long *, sizeof(*cookies) * ncookies, 1866 M_TEMP, M_WAITOK); 1867 *ap->a_ncookies = ncookies; 1868 *ap->a_cookies = cookies; 1869 } 1870 1871 if ((nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_GOTFSINFO)) == NFSMNT_NFSV3) 1872 (void)nfs_fsinfo(nmp, vp, cred, p); 1873 1874 cnt = 5; 1875 1876 MALLOC(data, void *, NFS_DIRBLKSIZ, M_TEMP, 1877 M_WAITOK); 1878 1879 do { 1880 struct nfs_dirent *ndp = data; 1881 1882 readdir_iovec.iov_len = NFS_DIRBLKSIZ; 1883 readdir_iovec.iov_base = data; 1884 readdir_uio.uio_offset = newoff; 1885 readdir_uio.uio_iov = &readdir_iovec; 1886 readdir_uio.uio_iovcnt = 1; 1887 readdir_uio.uio_segflg = UIO_SYSSPACE; 1888 readdir_uio.uio_rw = UIO_READ; 1889 readdir_uio.uio_resid = NFS_DIRBLKSIZ; 1890 readdir_uio.uio_procp = curproc; 1891 1892 if (nmp->nm_flag & NFSMNT_RDIRPLUS) { 1893 error = nfs_readdirplusrpc(vp, &readdir_uio, cred, 1894 &eof); 1895 if (error == NFSERR_NOTSUPP) 1896 nmp->nm_flag &= ~NFSMNT_RDIRPLUS; 1897 } 1898 if ((nmp->nm_flag & NFSMNT_RDIRPLUS) == 0) 1899 error = nfs_readdirrpc(vp, &readdir_uio, cred, &eof); 1900 1901 if (error == NFSERR_BAD_COOKIE) 1902 error = EINVAL; 1903 1904 while (error == 0 && 1905 (ap->a_cookies == NULL || ncookies != 0) && 1906 ndp < (struct nfs_dirent *)readdir_iovec.iov_base) { 1907 struct dirent *dp = &ndp->dirent; 1908 int reclen = dp->d_reclen; 1909 1910 dp->d_reclen -= NFS_DIRENT_OVERHEAD; 1911 1912 if (uio->uio_resid < dp->d_reclen) { 1913 done = 1; 1914 break; 1915 } 1916 1917 error = uiomove((caddr_t)dp, dp->d_reclen, uio); 1918 if (error) 1919 break; 1920 1921 newoff = fxdr_hyper(&ndp->cookie[0]); 1922 1923 if (ap->a_cookies != NULL) { 1924 *cookies = newoff; 1925 cookies++; 1926 ncookies--; 1927 } 1928 1929 ndp = (struct nfs_dirent *)((u_int8_t *)ndp + reclen); 1930 } 1931 } while (!error && !done && !eof && cnt--); 1932 1933 FREE(data, M_TEMP); 1934 data = NULL; 1935 1936 if (ap->a_cookies) { 1937 if (error) { 1938 FREE(*ap->a_cookies, M_TEMP); 1939 *ap->a_cookies = NULL; 1940 *ap->a_ncookies = 0; 1941 } else { 1942 *ap->a_ncookies -= ncookies; 1943 } 1944 } 1945 1946 if (!error) 1947 uio->uio_offset = newoff; 1948 1949 if (!error && (eof || uio->uio_resid == tresid)) { 1950 nfsstats.direofcache_misses++; 1951 *ap->a_eofflag = 1; 1952 return (0); 1953 } 1954 1955 *ap->a_eofflag = 0; 1956 return (error); 1957 } 1958 1959 1960 /* 1961 * The function below stuff the cookies in after the name 1962 */ 1963 1964 /* 1965 * Readdir rpc call. 1966 */ 1967 int 1968 nfs_readdirrpc(struct vnode *vp, 1969 struct uio *uiop, 1970 struct ucred *cred, 1971 int *end_of_directory) 1972 { 1973 register int len, left; 1974 struct nfs_dirent *ndp = NULL; 1975 register struct dirent *dp = NULL; 1976 register u_int32_t *tl; 1977 register caddr_t cp; 1978 register int32_t t1, t2; 1979 caddr_t bpos, dpos, cp2; 1980 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1981 nfsuint64 cookie; 1982 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1983 struct nfsnode *dnp = VTONFS(vp); 1984 u_quad_t fileno; 1985 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 1986 int attrflag; 1987 int v3 = NFS_ISV3(vp); 1988 1989 #ifndef DIAGNOSTIC 1990 if (uiop->uio_iovcnt != 1 || 1991 (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 1992 panic("nfs readdirrpc bad uio"); 1993 #endif 1994 1995 txdr_hyper(uiop->uio_offset, &cookie.nfsuquad[0]); 1996 1997 /* 1998 * Loop around doing readdir rpc's of size nm_readdirsize 1999 * truncated to a multiple of NFS_READDIRBLKSIZ. 2000 * The stopping criteria is EOF or buffer full. 2001 */ 2002 while (more_dirs && bigenough) { 2003 nfsstats.rpccnt[NFSPROC_READDIR]++; 2004 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2005 NFSX_READDIR(v3)); 2006 nfsm_fhtom(vp, v3); 2007 if (v3) { 2008 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2009 *tl++ = cookie.nfsuquad[0]; 2010 *tl++ = cookie.nfsuquad[1]; 2011 if (cookie.nfsuquad[0] == 0 && 2012 cookie.nfsuquad[1] == 0) { 2013 *tl++ = 0; 2014 *tl++ = 0; 2015 } else { 2016 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2017 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2018 } 2019 } else { 2020 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2021 *tl++ = cookie.nfsuquad[1]; 2022 } 2023 *tl = txdr_unsigned(nmp->nm_readdirsize); 2024 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2025 if (v3) { 2026 nfsm_postop_attr(vp, attrflag); 2027 if (!error) { 2028 nfsm_dissect(tl, u_int32_t *, 2029 2 * NFSX_UNSIGNED); 2030 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2031 dnp->n_cookieverf.nfsuquad[1] = *tl; 2032 } else { 2033 m_freem(mrep); 2034 goto nfsmout; 2035 } 2036 } 2037 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2038 more_dirs = fxdr_unsigned(int, *tl); 2039 2040 /* loop thru the dir entries, doctoring them to 4bsd form */ 2041 while (more_dirs && bigenough) { 2042 if (v3) { 2043 nfsm_dissect(tl, u_int32_t *, 2044 3 * NFSX_UNSIGNED); 2045 fileno = fxdr_hyper(tl); 2046 len = fxdr_unsigned(int, *(tl + 2)); 2047 } else { 2048 nfsm_dissect(tl, u_int32_t *, 2049 2 * NFSX_UNSIGNED); 2050 fileno = fxdr_unsigned(u_quad_t, *tl++); 2051 len = fxdr_unsigned(int, *tl); 2052 } 2053 if (len <= 0 || len > NFS_MAXNAMLEN) { 2054 error = EBADRPC; 2055 m_freem(mrep); 2056 goto nfsmout; 2057 } 2058 tlen = nfsm_rndup(len + 1); 2059 left = NFS_READDIRBLKSIZ - blksiz; 2060 if ((tlen + NFS_DIRHDSIZ) > left) { 2061 dp->d_reclen += left; 2062 (caddr_t)uiop->uio_iov->iov_base += left; 2063 uiop->uio_iov->iov_len -= left; 2064 uiop->uio_resid -= left; 2065 blksiz = 0; 2066 } 2067 if ((tlen + NFS_DIRHDSIZ) > uiop->uio_resid) 2068 bigenough = 0; 2069 if (bigenough) { 2070 ndp = (struct nfs_dirent *) 2071 uiop->uio_iov->iov_base; 2072 dp = &ndp->dirent; 2073 dp->d_fileno = (int)fileno; 2074 dp->d_namlen = len; 2075 dp->d_reclen = tlen + NFS_DIRHDSIZ; 2076 dp->d_type = DT_UNKNOWN; 2077 blksiz += dp->d_reclen; 2078 if (blksiz == NFS_READDIRBLKSIZ) 2079 blksiz = 0; 2080 uiop->uio_resid -= NFS_DIRHDSIZ; 2081 uiop->uio_iov->iov_base += NFS_DIRHDSIZ; 2082 uiop->uio_iov->iov_len -= NFS_DIRHDSIZ; 2083 nfsm_mtouio(uiop, len); 2084 cp = uiop->uio_iov->iov_base; 2085 tlen -= len; 2086 *cp = '\0'; /* null terminate */ 2087 (caddr_t)uiop->uio_iov->iov_base += tlen; 2088 uiop->uio_iov->iov_len -= tlen; 2089 uiop->uio_resid -= tlen; 2090 } else 2091 nfsm_adv(nfsm_rndup(len)); 2092 if (v3) { 2093 nfsm_dissect(tl, u_int32_t *, 2094 3 * NFSX_UNSIGNED); 2095 } else { 2096 nfsm_dissect(tl, u_int32_t *, 2097 2 * NFSX_UNSIGNED); 2098 } 2099 if (bigenough) { 2100 if (v3) { 2101 ndp->cookie[0] = cookie.nfsuquad[0] = 2102 *tl++; 2103 } else 2104 ndp->cookie[0] = 0; 2105 2106 ndp->cookie[1] = cookie.nfsuquad[1] = *tl++; 2107 } else if (v3) 2108 tl += 2; 2109 else 2110 tl++; 2111 more_dirs = fxdr_unsigned(int, *tl); 2112 } 2113 /* 2114 * If at end of rpc data, get the eof boolean 2115 */ 2116 if (!more_dirs) { 2117 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2118 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2119 } 2120 m_freem(mrep); 2121 } 2122 /* 2123 * Fill last record, iff any, out to a multiple of NFS_READDIRBLKSIZ 2124 * by increasing d_reclen for the last record. 2125 */ 2126 if (blksiz > 0) { 2127 left = NFS_READDIRBLKSIZ - blksiz; 2128 dp->d_reclen += left; 2129 uiop->uio_iov->iov_base += left; 2130 uiop->uio_iov->iov_len -= left; 2131 uiop->uio_resid -= left; 2132 } 2133 2134 /* 2135 * We are now either at the end of the directory or have filled the 2136 * block. 2137 */ 2138 if (bigenough) { 2139 dnp->n_direofoffset = fxdr_hyper(&cookie.nfsuquad[0]); 2140 if (end_of_directory) *end_of_directory = 1; 2141 } else { 2142 if (uiop->uio_resid > 0) 2143 printf("EEK! readdirrpc resid > 0\n"); 2144 } 2145 2146 nfsmout: 2147 return (error); 2148 } 2149 2150 /* 2151 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2152 */ 2153 int 2154 nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2155 int *end_of_directory) 2156 { 2157 register int len, left; 2158 struct nfs_dirent *ndirp = NULL; 2159 register struct dirent *dp = NULL; 2160 register u_int32_t *tl; 2161 register caddr_t cp; 2162 register int32_t t1, t2; 2163 register struct vnode *newvp; 2164 caddr_t bpos, dpos, cp2, dpossav1, dpossav2; 2165 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; 2166 struct nameidata nami, *ndp = &nami; 2167 struct componentname *cnp = &ndp->ni_cnd; 2168 nfsuint64 cookie; 2169 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2170 struct nfsnode *dnp = VTONFS(vp), *np; 2171 nfsfh_t *fhp; 2172 u_quad_t fileno; 2173 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2174 int attrflag, fhsize; 2175 2176 #ifndef DIAGNOSTIC 2177 if (uiop->uio_iovcnt != 1 || 2178 (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2179 panic("nfs readdirplusrpc bad uio"); 2180 #endif 2181 ndp->ni_dvp = vp; 2182 newvp = NULLVP; 2183 2184 txdr_hyper(uiop->uio_offset, &cookie.nfsuquad[0]); 2185 2186 /* 2187 * Loop around doing readdir rpc's of size nm_readdirsize 2188 * truncated to a multiple of NFS_READDIRBLKSIZ. 2189 * The stopping criteria is EOF or buffer full. 2190 */ 2191 while (more_dirs && bigenough) { 2192 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2193 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2194 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2195 nfsm_fhtom(vp, 1); 2196 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2197 *tl++ = cookie.nfsuquad[0]; 2198 *tl++ = cookie.nfsuquad[1]; 2199 if (cookie.nfsuquad[0] == 0 && 2200 cookie.nfsuquad[1] == 0) { 2201 *tl++ = 0; 2202 *tl++ = 0; 2203 } else { 2204 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2205 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2206 } 2207 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2208 *tl = txdr_unsigned(nmp->nm_rsize); 2209 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2210 nfsm_postop_attr(vp, attrflag); 2211 if (error) { 2212 m_freem(mrep); 2213 goto nfsmout; 2214 } 2215 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2216 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2217 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2218 more_dirs = fxdr_unsigned(int, *tl); 2219 2220 /* loop thru the dir entries, doctoring them to 4bsd form */ 2221 while (more_dirs && bigenough) { 2222 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2223 fileno = fxdr_hyper(tl); 2224 len = fxdr_unsigned(int, *(tl + 2)); 2225 if (len <= 0 || len > NFS_MAXNAMLEN) { 2226 error = EBADRPC; 2227 m_freem(mrep); 2228 goto nfsmout; 2229 } 2230 tlen = nfsm_rndup(len + 1); 2231 left = NFS_READDIRBLKSIZ - blksiz; 2232 if ((tlen + NFS_DIRHDSIZ) > left) { 2233 dp->d_reclen += left; 2234 uiop->uio_iov->iov_base += left; 2235 uiop->uio_iov->iov_len -= left; 2236 uiop->uio_resid -= left; 2237 blksiz = 0; 2238 } 2239 if ((tlen + NFS_DIRHDSIZ) > uiop->uio_resid) 2240 bigenough = 0; 2241 if (bigenough) { 2242 ndirp = (struct nfs_dirent *) 2243 uiop->uio_iov->iov_base; 2244 dp = &ndirp->dirent; 2245 dp->d_fileno = (int)fileno; 2246 dp->d_namlen = len; 2247 dp->d_reclen = tlen + NFS_DIRHDSIZ; 2248 dp->d_type = DT_UNKNOWN; 2249 blksiz += dp->d_reclen; 2250 if (blksiz == NFS_READDIRBLKSIZ) 2251 blksiz = 0; 2252 uiop->uio_resid -= NFS_DIRHDSIZ; 2253 uiop->uio_iov->iov_base += NFS_DIRHDSIZ; 2254 uiop->uio_iov->iov_len -= NFS_DIRHDSIZ; 2255 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2256 cnp->cn_namelen = len; 2257 nfsm_mtouio(uiop, len); 2258 cp = uiop->uio_iov->iov_base; 2259 tlen -= len; 2260 *cp = '\0'; 2261 uiop->uio_iov->iov_base += tlen; 2262 uiop->uio_iov->iov_len -= tlen; 2263 uiop->uio_resid -= tlen; 2264 } else 2265 nfsm_adv(nfsm_rndup(len)); 2266 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2267 if (bigenough) { 2268 ndirp->cookie[0] = cookie.nfsuquad[0] = *tl++; 2269 ndirp->cookie[1] = cookie.nfsuquad[1] = *tl++; 2270 } else 2271 tl += 2; 2272 2273 /* 2274 * Since the attributes are before the file handle 2275 * (sigh), we must skip over the attributes and then 2276 * come back and get them. 2277 */ 2278 attrflag = fxdr_unsigned(int, *tl); 2279 if (attrflag) { 2280 dpossav1 = dpos; 2281 mdsav1 = md; 2282 nfsm_adv(NFSX_V3FATTR); 2283 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2284 doit = fxdr_unsigned(int, *tl); 2285 if (doit) { 2286 nfsm_getfh(fhp, fhsize, 1); 2287 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2288 VREF(vp); 2289 newvp = vp; 2290 np = dnp; 2291 } else { 2292 error = nfs_nget(vp->v_mount, fhp, 2293 fhsize, &np); 2294 if (error) 2295 doit = 0; 2296 else 2297 newvp = NFSTOV(np); 2298 } 2299 } 2300 if (doit) { 2301 dpossav2 = dpos; 2302 dpos = dpossav1; 2303 mdsav2 = md; 2304 md = mdsav1; 2305 nfsm_loadattr(newvp, (struct vattr *)0); 2306 dpos = dpossav2; 2307 md = mdsav2; 2308 dp->d_type = 2309 IFTODT(VTTOIF(np->n_vattr.va_type)); 2310 ndp->ni_vp = newvp; 2311 cnp->cn_hash = 0; 2312 for (cp = cnp->cn_nameptr, i = 1; i <= len; 2313 i++, cp++) 2314 cnp->cn_hash += (unsigned char)*cp * i; 2315 if (cnp->cn_namelen <= NCHNAMLEN) 2316 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 2317 } 2318 } else { 2319 /* Just skip over the file handle */ 2320 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2321 i = fxdr_unsigned(int, *tl); 2322 nfsm_adv(nfsm_rndup(i)); 2323 } 2324 if (newvp != NULLVP) { 2325 vrele(newvp); 2326 newvp = NULLVP; 2327 } 2328 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2329 more_dirs = fxdr_unsigned(int, *tl); 2330 } 2331 /* 2332 * If at end of rpc data, get the eof boolean 2333 */ 2334 if (!more_dirs) { 2335 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2336 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2337 } 2338 m_freem(mrep); 2339 } 2340 /* 2341 * Fill last record, iff any, out to a multiple of NFS_READDIRBLKSIZ 2342 * by increasing d_reclen for the last record. 2343 */ 2344 if (blksiz > 0) { 2345 left = NFS_READDIRBLKSIZ - blksiz; 2346 dp->d_reclen += left; 2347 uiop->uio_iov->iov_base += left; 2348 uiop->uio_iov->iov_len -= left; 2349 uiop->uio_resid -= left; 2350 } 2351 2352 /* 2353 * We are now either at the end of the directory or have filled the 2354 * block. 2355 */ 2356 if (bigenough) { 2357 dnp->n_direofoffset = fxdr_hyper(&cookie.nfsuquad[0]); 2358 if (end_of_directory) *end_of_directory = 1; 2359 } else { 2360 if (uiop->uio_resid > 0) 2361 printf("EEK! readdirplusrpc resid > 0\n"); 2362 } 2363 2364 nfsmout: 2365 if (newvp != NULLVP) 2366 vrele(newvp); 2367 return (error); 2368 } 2369 2370 /* 2371 * Silly rename. To make the NFS filesystem that is stateless look a little 2372 * more like the "ufs" a remove of an active vnode is translated to a rename 2373 * to a funny looking filename that is removed by nfs_inactive on the 2374 * nfsnode. There is the potential for another process on a different client 2375 * to create the same funny name between the nfs_lookitup() fails and the 2376 * nfs_rename() completes, but... 2377 */ 2378 int 2379 nfs_sillyrename(dvp, vp, cnp) 2380 struct vnode *dvp, *vp; 2381 struct componentname *cnp; 2382 { 2383 register struct sillyrename *sp; 2384 struct nfsnode *np; 2385 int error; 2386 2387 cache_purge(dvp); 2388 np = VTONFS(vp); 2389 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2390 M_NFSREQ, M_WAITOK); 2391 sp->s_cred = crdup(cnp->cn_cred); 2392 sp->s_dvp = dvp; 2393 VREF(dvp); 2394 2395 if (vp->v_type == VDIR) { 2396 #ifdef DIAGNOSTIC 2397 printf("nfs: sillyrename dir\n"); 2398 #endif 2399 error = EINVAL; 2400 goto bad; 2401 } 2402 2403 /* Fudge together a funny name */ 2404 sp->s_namlen = sprintf(sp->s_name, ".nfsA%05x4.4", cnp->cn_proc->p_pid); 2405 2406 /* Try lookitups until we get one that isn't there */ 2407 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2408 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2409 sp->s_name[4]++; 2410 if (sp->s_name[4] > 'z') { 2411 error = EINVAL; 2412 goto bad; 2413 } 2414 } 2415 error = nfs_renameit(dvp, cnp, sp); 2416 if (error) 2417 goto bad; 2418 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2419 cnp->cn_proc, &np); 2420 np->n_sillyrename = sp; 2421 return (0); 2422 bad: 2423 vrele(sp->s_dvp); 2424 crfree(sp->s_cred); 2425 FREE((caddr_t)sp, M_NFSREQ); 2426 return (error); 2427 } 2428 2429 /* 2430 * Look up a file name and optionally either update the file handle or 2431 * allocate an nfsnode, depending on the value of npp. 2432 * npp == NULL --> just do the lookup 2433 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2434 * handled too 2435 * *npp != NULL --> update the file handle in the vnode 2436 */ 2437 int 2438 nfs_lookitup(dvp, name, len, cred, procp, npp) 2439 register struct vnode *dvp; 2440 char *name; 2441 int len; 2442 struct ucred *cred; 2443 struct proc *procp; 2444 struct nfsnode **npp; 2445 { 2446 register u_int32_t *tl; 2447 register caddr_t cp; 2448 register int32_t t1, t2; 2449 struct vnode *newvp = (struct vnode *)0; 2450 struct nfsnode *np, *dnp = VTONFS(dvp); 2451 caddr_t bpos, dpos, cp2; 2452 int error = 0, fhlen, attrflag; 2453 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2454 nfsfh_t *nfhp; 2455 int v3 = NFS_ISV3(dvp); 2456 2457 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2458 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2459 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2460 nfsm_fhtom(dvp, v3); 2461 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2462 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2463 if (npp && !error) { 2464 nfsm_getfh(nfhp, fhlen, v3); 2465 if (*npp) { 2466 np = *npp; 2467 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2468 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2469 np->n_fhp = &np->n_fh; 2470 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2471 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2472 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2473 np->n_fhsize = fhlen; 2474 newvp = NFSTOV(np); 2475 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2476 VREF(dvp); 2477 newvp = dvp; 2478 } else { 2479 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2480 if (error) { 2481 m_freem(mrep); 2482 return (error); 2483 } 2484 newvp = NFSTOV(np); 2485 } 2486 if (v3) { 2487 nfsm_postop_attr(newvp, attrflag); 2488 if (!attrflag && *npp == NULL) { 2489 m_freem(mrep); 2490 vrele(newvp); 2491 return (ENOENT); 2492 } 2493 } else 2494 nfsm_loadattr(newvp, (struct vattr *)0); 2495 } 2496 nfsm_reqdone; 2497 if (npp && *npp == NULL) { 2498 if (error) { 2499 if (newvp) 2500 vrele(newvp); 2501 } else 2502 *npp = np; 2503 } 2504 return (error); 2505 } 2506 2507 /* 2508 * Nfs Version 3 commit rpc 2509 */ 2510 int 2511 nfs_commit(vp, offset, cnt, cred, procp) 2512 register struct vnode *vp; 2513 u_quad_t offset; 2514 int cnt; 2515 struct ucred *cred; 2516 struct proc *procp; 2517 { 2518 register caddr_t cp; 2519 register u_int32_t *tl; 2520 register int32_t t1, t2; 2521 register struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2522 caddr_t bpos, dpos, cp2; 2523 int error = 0, wccflag = NFSV3_WCCRATTR; 2524 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2525 2526 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) 2527 return (0); 2528 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2529 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2530 nfsm_fhtom(vp, 1); 2531 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2532 txdr_hyper(offset, tl); 2533 tl += 2; 2534 *tl = txdr_unsigned(cnt); 2535 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2536 nfsm_wcc_data(vp, wccflag); 2537 if (!error) { 2538 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2539 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2540 NFSX_V3WRITEVERF)) { 2541 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 2542 NFSX_V3WRITEVERF); 2543 error = NFSERR_STALEWRITEVERF; 2544 } 2545 } 2546 nfsm_reqdone; 2547 return (error); 2548 } 2549 2550 /* 2551 * Kludge City.. 2552 * - make nfs_bmap() essentially a no-op that does no translation 2553 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2554 * (Maybe I could use the process's page mapping, but I was concerned that 2555 * Kernel Write might not be enabled and also figured copyout() would do 2556 * a lot more work than bcopy() and also it currently happens in the 2557 * context of the swapper process (2). 2558 */ 2559 int 2560 nfs_bmap(v) 2561 void *v; 2562 { 2563 struct vop_bmap_args /* { 2564 struct vnode *a_vp; 2565 daddr_t a_bn; 2566 struct vnode **a_vpp; 2567 daddr_t *a_bnp; 2568 int *a_runp; 2569 } */ *ap = v; 2570 register struct vnode *vp = ap->a_vp; 2571 2572 if (ap->a_vpp != NULL) 2573 *ap->a_vpp = vp; 2574 if (ap->a_bnp != NULL) 2575 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2576 return (0); 2577 } 2578 2579 /* 2580 * Strategy routine. 2581 * For async requests when nfsiod(s) are running, queue the request by 2582 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2583 * request. 2584 */ 2585 int 2586 nfs_strategy(v) 2587 void *v; 2588 { 2589 struct vop_strategy_args *ap = v; 2590 register struct buf *bp = ap->a_bp; 2591 struct ucred *cr; 2592 struct proc *p; 2593 int error = 0; 2594 2595 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2596 panic("nfs physio/async"); 2597 if (bp->b_flags & B_ASYNC) 2598 p = (struct proc *)0; 2599 else 2600 p = curproc; /* XXX */ 2601 if (bp->b_flags & B_READ) 2602 cr = bp->b_rcred; 2603 else 2604 cr = bp->b_wcred; 2605 /* 2606 * If the op is asynchronous and an i/o daemon is waiting 2607 * queue the request, wake it up and wait for completion 2608 * otherwise just do it ourselves. 2609 */ 2610 if ((bp->b_flags & B_ASYNC) == 0 || 2611 nfs_asyncio(bp, NOCRED)) 2612 error = nfs_doio(bp, cr, p); 2613 return (error); 2614 } 2615 2616 /* 2617 * fsync vnode op. Just call nfs_flush() with commit == 1. 2618 */ 2619 /* ARGSUSED */ 2620 int 2621 nfs_fsync(v) 2622 void *v; 2623 { 2624 struct vop_fsync_args /* { 2625 struct vnodeop_desc *a_desc; 2626 struct vnode * a_vp; 2627 struct ucred * a_cred; 2628 int a_waitfor; 2629 struct proc * a_p; 2630 } */ *ap = v; 2631 2632 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1)); 2633 } 2634 2635 /* 2636 * Flush all the blocks associated with a vnode. 2637 * Walk through the buffer pool and push any dirty pages 2638 * associated with the vnode. 2639 */ 2640 int 2641 nfs_flush(vp, cred, waitfor, p, commit) 2642 register struct vnode *vp; 2643 struct ucred *cred; 2644 int waitfor; 2645 struct proc *p; 2646 int commit; 2647 { 2648 register struct nfsnode *np = VTONFS(vp); 2649 register struct buf *bp; 2650 register int i; 2651 struct buf *nbp; 2652 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2653 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2654 int passone = 1; 2655 u_quad_t off = (u_quad_t)-1, endoff = 0, toff; 2656 struct ucred* wcred = NULL; 2657 #ifndef NFS_COMMITBVECSIZ 2658 #define NFS_COMMITBVECSIZ 20 2659 #endif 2660 struct buf *bvec[NFS_COMMITBVECSIZ]; 2661 2662 if (nmp->nm_flag & NFSMNT_INT) 2663 slpflag = PCATCH; 2664 if (!commit) 2665 passone = 0; 2666 /* 2667 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2668 * server, but nas not been committed to stable storage on the server 2669 * yet. On the first pass, the byte range is worked out and the commit 2670 * rpc is done. On the second pass, nfs_writebp() is called to do the 2671 * job. 2672 */ 2673 again: 2674 bvecpos = 0; 2675 if (NFS_ISV3(vp) && commit) { 2676 s = splbio(); 2677 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2678 nbp = bp->b_vnbufs.le_next; 2679 if (bvecpos >= NFS_COMMITBVECSIZ) 2680 break; 2681 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2682 != (B_DELWRI | B_NEEDCOMMIT)) 2683 continue; 2684 bremfree(bp); 2685 /* 2686 * Work out if all buffers are using the same cred 2687 * so we can deal with them all with one commit. 2688 */ 2689 if (wcred == NULL) 2690 wcred = bp->b_wcred; 2691 else if (wcred != bp->b_wcred) 2692 wcred = NOCRED; 2693 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2694 /* 2695 * A list of these buffers is kept so that the 2696 * second loop knows which buffers have actually 2697 * been committed. This is necessary, since there 2698 * may be a race between the commit rpc and new 2699 * uncommitted writes on the file. 2700 */ 2701 bvec[bvecpos++] = bp; 2702 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2703 bp->b_dirtyoff; 2704 if (toff < off) 2705 off = toff; 2706 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2707 if (toff > endoff) 2708 endoff = toff; 2709 } 2710 splx(s); 2711 } 2712 if (bvecpos > 0) { 2713 /* 2714 * Commit data on the server, as required. 2715 * If all bufs are using the same wcred, then use that with 2716 * one call for all of them, otherwise commit each one 2717 * separately. 2718 */ 2719 if (wcred != NOCRED) 2720 retv = nfs_commit(vp, off, (int)(endoff - off), 2721 wcred, p); 2722 else { 2723 retv = 0; 2724 for (i = 0; i < bvecpos; i++) { 2725 off_t off, size; 2726 bp = bvec[i]; 2727 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2728 bp->b_dirtyoff; 2729 size = (u_quad_t)(bp->b_dirtyend 2730 - bp->b_dirtyoff); 2731 retv = nfs_commit(vp, off, (int)size, 2732 bp->b_wcred, p); 2733 if (retv) break; 2734 } 2735 } 2736 2737 if (retv == NFSERR_STALEWRITEVERF) 2738 nfs_clearcommit(vp->v_mount); 2739 /* 2740 * Now, either mark the blocks I/O done or mark the 2741 * blocks dirty, depending on whether the commit 2742 * succeeded. 2743 */ 2744 for (i = 0; i < bvecpos; i++) { 2745 bp = bvec[i]; 2746 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2747 if (retv) 2748 brelse(bp); 2749 else { 2750 s = splbio(); 2751 buf_undirty(bp); 2752 vp->v_numoutput++; 2753 bp->b_flags |= B_ASYNC; 2754 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); 2755 bp->b_dirtyoff = bp->b_dirtyend = 0; 2756 splx(s); 2757 biodone(bp); 2758 } 2759 } 2760 } 2761 2762 /* 2763 * Start/do any write(s) that are required. 2764 */ 2765 loop: 2766 s = splbio(); 2767 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2768 nbp = bp->b_vnbufs.le_next; 2769 if (bp->b_flags & B_BUSY) { 2770 if (waitfor != MNT_WAIT || passone) 2771 continue; 2772 bp->b_flags |= B_WANTED; 2773 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2774 "nfsfsync", slptimeo); 2775 splx(s); 2776 if (error) { 2777 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2778 return (EINTR); 2779 if (slpflag == PCATCH) { 2780 slpflag = 0; 2781 slptimeo = 2 * hz; 2782 } 2783 } 2784 goto loop; 2785 } 2786 if ((bp->b_flags & B_DELWRI) == 0) 2787 panic("nfs_fsync: not dirty"); 2788 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2789 continue; 2790 bremfree(bp); 2791 if (passone || !commit) 2792 bp->b_flags |= (B_BUSY|B_ASYNC); 2793 else 2794 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2795 splx(s); 2796 VOP_BWRITE(bp); 2797 goto loop; 2798 } 2799 splx(s); 2800 if (passone) { 2801 passone = 0; 2802 goto again; 2803 } 2804 if (waitfor == MNT_WAIT) { 2805 loop2: 2806 s = splbio(); 2807 error = vwaitforio(vp, slpflag, "nfs_fsync", slptimeo); 2808 splx(s); 2809 if (error) { 2810 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2811 return (EINTR); 2812 if (slpflag == PCATCH) { 2813 slpflag = 0; 2814 slptimeo = 2 * hz; 2815 } 2816 goto loop2; 2817 } 2818 2819 if (vp->v_dirtyblkhd.lh_first && commit) { 2820 #if 0 2821 vprint("nfs_fsync: dirty", vp); 2822 #endif 2823 goto loop; 2824 } 2825 } 2826 if (np->n_flag & NWRITEERR) { 2827 error = np->n_error; 2828 np->n_flag &= ~NWRITEERR; 2829 } 2830 return (error); 2831 } 2832 2833 /* 2834 * Return POSIX pathconf information applicable to nfs. 2835 * 2836 * The NFS V2 protocol doesn't support this, so just return EINVAL 2837 * for V2. 2838 */ 2839 /* ARGSUSED */ 2840 int 2841 nfs_pathconf(v) 2842 void *v; 2843 { 2844 #if 0 2845 struct vop_pathconf_args /* { 2846 struct vnode *a_vp; 2847 int a_name; 2848 register_t *a_retval; 2849 } */ *ap = v; 2850 #endif 2851 2852 return (EINVAL); 2853 } 2854 2855 /* 2856 * NFS advisory byte-level locks. 2857 */ 2858 int 2859 nfs_advlock(v) 2860 void *v; 2861 { 2862 struct vop_advlock_args /* { 2863 struct vnode *a_vp; 2864 caddr_t a_id; 2865 int a_op; 2866 struct flock *a_fl; 2867 int a_flags; 2868 } */ *ap = v; 2869 register struct nfsnode *np = VTONFS(ap->a_vp); 2870 2871 return (lf_advlock(&np->n_lockf, np->n_size, ap->a_id, ap->a_op, 2872 ap->a_fl, ap->a_flags)); 2873 } 2874 2875 /* 2876 * Print out the contents of an nfsnode. 2877 */ 2878 int 2879 nfs_print(v) 2880 void *v; 2881 { 2882 struct vop_print_args /* { 2883 struct vnode *a_vp; 2884 } */ *ap = v; 2885 register struct vnode *vp = ap->a_vp; 2886 register struct nfsnode *np = VTONFS(vp); 2887 2888 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 2889 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 2890 #ifdef FIFO 2891 if (vp->v_type == VFIFO) 2892 fifo_printinfo(vp); 2893 #endif 2894 printf("\n"); 2895 return (0); 2896 } 2897 2898 /* 2899 * Just call nfs_writebp() with the force argument set to 1. 2900 */ 2901 int 2902 nfs_bwrite(v) 2903 void *v; 2904 { 2905 struct vop_bwrite_args /* { 2906 struct buf *a_bp; 2907 } */ *ap = v; 2908 2909 return (nfs_writebp(ap->a_bp, 1)); 2910 } 2911 2912 /* 2913 * This is a clone of vop_generic_bwrite(), except that B_WRITEINPROG isn't set unless 2914 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 2915 */ 2916 int 2917 nfs_writebp(bp, force) 2918 register struct buf *bp; 2919 int force; 2920 { 2921 register int oldflags = bp->b_flags, retv = 1; 2922 register struct proc *p = curproc; /* XXX */ 2923 off_t off; 2924 int s; 2925 2926 if(!(bp->b_flags & B_BUSY)) 2927 panic("bwrite: buffer is not busy???"); 2928 2929 #ifdef fvdl_debug 2930 printf("nfs_writebp(%x): vp %x voff %d vend %d doff %d dend %d\n", 2931 bp, bp->b_vp, bp->b_validoff, bp->b_validend, bp->b_dirtyoff, 2932 bp->b_dirtyend); 2933 #endif 2934 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); 2935 2936 s = splbio(); 2937 buf_undirty(bp); 2938 2939 if ((oldflags & B_ASYNC) && !(oldflags & B_DELWRI) && p) 2940 ++p->p_stats->p_ru.ru_oublock; 2941 2942 bp->b_vp->v_numoutput++; 2943 splx(s); 2944 2945 /* 2946 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 2947 * an actual write will have to be scheduled via. VOP_STRATEGY(). 2948 * If B_WRITEINPROG is already set, then push it with a write anyhow. 2949 */ 2950 if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) { 2951 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 2952 bp->b_flags |= B_WRITEINPROG; 2953 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 2954 bp->b_wcred, bp->b_proc); 2955 bp->b_flags &= ~B_WRITEINPROG; 2956 if (!retv) { 2957 bp->b_dirtyoff = bp->b_dirtyend = 0; 2958 bp->b_flags &= ~B_NEEDCOMMIT; 2959 biodone(bp); 2960 } else if (retv == NFSERR_STALEWRITEVERF) 2961 nfs_clearcommit(bp->b_vp->v_mount); 2962 } 2963 if (retv) { 2964 if (force) 2965 bp->b_flags |= B_WRITEINPROG; 2966 VOP_STRATEGY(bp); 2967 } 2968 2969 if( (oldflags & B_ASYNC) == 0) { 2970 int rtval = biowait(bp); 2971 if (!(oldflags & B_DELWRI) && p) { 2972 ++p->p_stats->p_ru.ru_oublock; 2973 } 2974 brelse(bp); 2975 return (rtval); 2976 } 2977 2978 return (0); 2979 } 2980 2981 /* 2982 * nfs special file access vnode op. 2983 * Essentially just get vattr and then imitate iaccess() since the device is 2984 * local to the client. 2985 */ 2986 int 2987 nfsspec_access(v) 2988 void *v; 2989 { 2990 struct vop_access_args /* { 2991 struct vnode *a_vp; 2992 int a_mode; 2993 struct ucred *a_cred; 2994 struct proc *a_p; 2995 } */ *ap = v; 2996 struct vattr va; 2997 struct vnode *vp = ap->a_vp; 2998 int error; 2999 3000 /* 3001 * Disallow write attempts on filesystems mounted read-only; 3002 * unless the file is a socket, fifo, or a block or character 3003 * device resident on the filesystem. 3004 */ 3005 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3006 switch (vp->v_type) { 3007 case VREG: 3008 case VDIR: 3009 case VLNK: 3010 return (EROFS); 3011 default: 3012 break; 3013 } 3014 } 3015 3016 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3017 if (error) 3018 return (error); 3019 3020 return (vaccess(va.va_mode, va.va_uid, va.va_gid, ap->a_mode, 3021 ap->a_cred)); 3022 } 3023 3024 /* 3025 * Read wrapper for special devices. 3026 */ 3027 int 3028 nfsspec_read(v) 3029 void *v; 3030 { 3031 struct vop_read_args /* { 3032 struct vnode *a_vp; 3033 struct uio *a_uio; 3034 int a_ioflag; 3035 struct ucred *a_cred; 3036 } */ *ap = v; 3037 register struct nfsnode *np = VTONFS(ap->a_vp); 3038 3039 /* 3040 * Set access flag. 3041 */ 3042 np->n_flag |= NACC; 3043 np->n_atim.tv_sec = time.tv_sec; 3044 np->n_atim.tv_nsec = time.tv_usec * 1000; 3045 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3046 } 3047 3048 /* 3049 * Write wrapper for special devices. 3050 */ 3051 int 3052 nfsspec_write(v) 3053 void *v; 3054 { 3055 struct vop_write_args /* { 3056 struct vnode *a_vp; 3057 struct uio *a_uio; 3058 int a_ioflag; 3059 struct ucred *a_cred; 3060 } */ *ap = v; 3061 register struct nfsnode *np = VTONFS(ap->a_vp); 3062 3063 /* 3064 * Set update flag. 3065 */ 3066 np->n_flag |= NUPD; 3067 np->n_mtim.tv_sec = time.tv_sec; 3068 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3069 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3070 } 3071 3072 /* 3073 * Close wrapper for special devices. 3074 * 3075 * Update the times on the nfsnode then do device close. 3076 */ 3077 int 3078 nfsspec_close(v) 3079 void *v; 3080 { 3081 struct vop_close_args /* { 3082 struct vnode *a_vp; 3083 int a_fflag; 3084 struct ucred *a_cred; 3085 struct proc *a_p; 3086 } */ *ap = v; 3087 register struct vnode *vp = ap->a_vp; 3088 register struct nfsnode *np = VTONFS(vp); 3089 struct vattr vattr; 3090 3091 if (np->n_flag & (NACC | NUPD)) { 3092 np->n_flag |= NCHG; 3093 if (vp->v_usecount == 1 && 3094 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3095 VATTR_NULL(&vattr); 3096 if (np->n_flag & NACC) 3097 vattr.va_atime = np->n_atim; 3098 if (np->n_flag & NUPD) 3099 vattr.va_mtime = np->n_mtim; 3100 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3101 } 3102 } 3103 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3104 } 3105 3106 #ifdef FIFO 3107 /* 3108 * Read wrapper for fifos. 3109 */ 3110 int 3111 nfsfifo_read(v) 3112 void *v; 3113 { 3114 struct vop_read_args /* { 3115 struct vnode *a_vp; 3116 struct uio *a_uio; 3117 int a_ioflag; 3118 struct ucred *a_cred; 3119 } */ *ap = v; 3120 extern int (**fifo_vnodeop_p) __P((void *)); 3121 register struct nfsnode *np = VTONFS(ap->a_vp); 3122 3123 /* 3124 * Set access flag. 3125 */ 3126 np->n_flag |= NACC; 3127 np->n_atim.tv_sec = time.tv_sec; 3128 np->n_atim.tv_nsec = time.tv_usec * 1000; 3129 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3130 } 3131 3132 /* 3133 * Write wrapper for fifos. 3134 */ 3135 int 3136 nfsfifo_write(v) 3137 void *v; 3138 { 3139 struct vop_write_args /* { 3140 struct vnode *a_vp; 3141 struct uio *a_uio; 3142 int a_ioflag; 3143 struct ucred *a_cred; 3144 } */ *ap = v; 3145 extern int (**fifo_vnodeop_p) __P((void *)); 3146 register struct nfsnode *np = VTONFS(ap->a_vp); 3147 3148 /* 3149 * Set update flag. 3150 */ 3151 np->n_flag |= NUPD; 3152 np->n_mtim.tv_sec = time.tv_sec; 3153 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3154 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3155 } 3156 3157 /* 3158 * Close wrapper for fifos. 3159 * 3160 * Update the times on the nfsnode then do fifo close. 3161 */ 3162 int 3163 nfsfifo_close(v) 3164 void *v; 3165 { 3166 struct vop_close_args /* { 3167 struct vnode *a_vp; 3168 int a_fflag; 3169 struct ucred *a_cred; 3170 struct proc *a_p; 3171 } */ *ap = v; 3172 register struct vnode *vp = ap->a_vp; 3173 register struct nfsnode *np = VTONFS(vp); 3174 struct vattr vattr; 3175 extern int (**fifo_vnodeop_p) __P((void *)); 3176 3177 if (np->n_flag & (NACC | NUPD)) { 3178 if (np->n_flag & NACC) { 3179 np->n_atim.tv_sec = time.tv_sec; 3180 np->n_atim.tv_nsec = time.tv_usec * 1000; 3181 } 3182 if (np->n_flag & NUPD) { 3183 np->n_mtim.tv_sec = time.tv_sec; 3184 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3185 } 3186 np->n_flag |= NCHG; 3187 if (vp->v_usecount == 1 && 3188 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3189 VATTR_NULL(&vattr); 3190 if (np->n_flag & NACC) 3191 vattr.va_atime = np->n_atim; 3192 if (np->n_flag & NUPD) 3193 vattr.va_mtime = np->n_mtim; 3194 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3195 } 3196 } 3197 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3198 } 3199 #endif /* ! FIFO */ 3200