nfs_vnops.c revision 1.196
1 /* $NetBSD: nfs_vnops.c,v 1.196 2004/05/08 21:35:13 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * vnode op calls for Sun NFS version 2 and 3 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.196 2004/05/08 21:35:13 yamt Exp $"); 43 44 #include "opt_nfs.h" 45 #include "opt_uvmhist.h" 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/namei.h> 58 #include <sys/vnode.h> 59 #include <sys/dirent.h> 60 #include <sys/fcntl.h> 61 #include <sys/hash.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/unistd.h> 65 66 #include <uvm/uvm_extern.h> 67 #include <uvm/uvm.h> 68 69 #include <miscfs/fifofs/fifo.h> 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsproto.h> 75 #include <nfs/nfs.h> 76 #include <nfs/nfsnode.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/xdr_subs.h> 79 #include <nfs/nfsm_subs.h> 80 #include <nfs/nqnfs.h> 81 #include <nfs/nfs_var.h> 82 83 #include <net/if.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 87 /* 88 * Global vfs data structures for nfs 89 */ 90 int (**nfsv2_vnodeop_p) __P((void *)); 91 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 92 { &vop_default_desc, vn_default_error }, 93 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 94 { &vop_create_desc, nfs_create }, /* create */ 95 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 96 { &vop_open_desc, nfs_open }, /* open */ 97 { &vop_close_desc, nfs_close }, /* close */ 98 { &vop_access_desc, nfs_access }, /* access */ 99 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 100 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 101 { &vop_read_desc, nfs_read }, /* read */ 102 { &vop_write_desc, nfs_write }, /* write */ 103 { &vop_lease_desc, nfs_lease_check }, /* lease */ 104 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 105 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 106 { &vop_poll_desc, nfs_poll }, /* poll */ 107 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 108 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 109 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 110 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 111 { &vop_seek_desc, nfs_seek }, /* seek */ 112 { &vop_remove_desc, nfs_remove }, /* remove */ 113 { &vop_link_desc, nfs_link }, /* link */ 114 { &vop_rename_desc, nfs_rename }, /* rename */ 115 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 116 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 117 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 118 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 119 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 120 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 121 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 122 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 123 { &vop_lock_desc, nfs_lock }, /* lock */ 124 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 125 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 126 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 127 { &vop_print_desc, nfs_print }, /* print */ 128 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 129 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 130 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 131 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 132 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 133 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 134 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 135 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 136 { &vop_update_desc, nfs_update }, /* update */ 137 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 138 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 139 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 140 { NULL, NULL } 141 }; 142 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 143 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 144 145 /* 146 * Special device vnode ops 147 */ 148 int (**spec_nfsv2nodeop_p) __P((void *)); 149 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 150 { &vop_default_desc, vn_default_error }, 151 { &vop_lookup_desc, spec_lookup }, /* lookup */ 152 { &vop_create_desc, spec_create }, /* create */ 153 { &vop_mknod_desc, spec_mknod }, /* mknod */ 154 { &vop_open_desc, spec_open }, /* open */ 155 { &vop_close_desc, nfsspec_close }, /* close */ 156 { &vop_access_desc, nfsspec_access }, /* access */ 157 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 158 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 159 { &vop_read_desc, nfsspec_read }, /* read */ 160 { &vop_write_desc, nfsspec_write }, /* write */ 161 { &vop_lease_desc, spec_lease_check }, /* lease */ 162 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 163 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 164 { &vop_poll_desc, spec_poll }, /* poll */ 165 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 166 { &vop_revoke_desc, spec_revoke }, /* revoke */ 167 { &vop_mmap_desc, spec_mmap }, /* mmap */ 168 { &vop_fsync_desc, spec_fsync }, /* fsync */ 169 { &vop_seek_desc, spec_seek }, /* seek */ 170 { &vop_remove_desc, spec_remove }, /* remove */ 171 { &vop_link_desc, spec_link }, /* link */ 172 { &vop_rename_desc, spec_rename }, /* rename */ 173 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 174 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 175 { &vop_symlink_desc, spec_symlink }, /* symlink */ 176 { &vop_readdir_desc, spec_readdir }, /* readdir */ 177 { &vop_readlink_desc, spec_readlink }, /* readlink */ 178 { &vop_abortop_desc, spec_abortop }, /* abortop */ 179 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 180 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 181 { &vop_lock_desc, nfs_lock }, /* lock */ 182 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 183 { &vop_bmap_desc, spec_bmap }, /* bmap */ 184 { &vop_strategy_desc, spec_strategy }, /* strategy */ 185 { &vop_print_desc, nfs_print }, /* print */ 186 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 187 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 188 { &vop_advlock_desc, spec_advlock }, /* advlock */ 189 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 190 { &vop_valloc_desc, spec_valloc }, /* valloc */ 191 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 192 { &vop_vfree_desc, spec_vfree }, /* vfree */ 193 { &vop_truncate_desc, spec_truncate }, /* truncate */ 194 { &vop_update_desc, nfs_update }, /* update */ 195 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 196 { &vop_getpages_desc, spec_getpages }, /* getpages */ 197 { &vop_putpages_desc, spec_putpages }, /* putpages */ 198 { NULL, NULL } 199 }; 200 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 201 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 202 203 int (**fifo_nfsv2nodeop_p) __P((void *)); 204 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 205 { &vop_default_desc, vn_default_error }, 206 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 207 { &vop_create_desc, fifo_create }, /* create */ 208 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 209 { &vop_open_desc, fifo_open }, /* open */ 210 { &vop_close_desc, nfsfifo_close }, /* close */ 211 { &vop_access_desc, nfsspec_access }, /* access */ 212 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 213 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 214 { &vop_read_desc, nfsfifo_read }, /* read */ 215 { &vop_write_desc, nfsfifo_write }, /* write */ 216 { &vop_lease_desc, fifo_lease_check }, /* lease */ 217 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 218 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 219 { &vop_poll_desc, fifo_poll }, /* poll */ 220 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 221 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 222 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 223 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 224 { &vop_seek_desc, fifo_seek }, /* seek */ 225 { &vop_remove_desc, fifo_remove }, /* remove */ 226 { &vop_link_desc, fifo_link }, /* link */ 227 { &vop_rename_desc, fifo_rename }, /* rename */ 228 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 229 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 230 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 231 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 232 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 233 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 234 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 235 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 236 { &vop_lock_desc, nfs_lock }, /* lock */ 237 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 238 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 239 { &vop_strategy_desc, genfs_badop }, /* strategy */ 240 { &vop_print_desc, nfs_print }, /* print */ 241 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 242 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 243 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 244 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 245 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 246 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 247 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 248 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 249 { &vop_update_desc, nfs_update }, /* update */ 250 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 251 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 252 { NULL, NULL } 253 }; 254 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 255 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 256 257 static void nfs_writerpc_extfree(struct mbuf *, caddr_t, size_t, void *); 258 259 /* 260 * Global variables 261 */ 262 extern u_int32_t nfs_true, nfs_false; 263 extern u_int32_t nfs_xdrneg1; 264 extern const nfstype nfsv3_type[9]; 265 266 int nfs_numasync = 0; 267 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 268 269 static void nfs_cache_enter(struct vnode *, struct vnode *, 270 struct componentname *); 271 272 static void 273 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 274 struct componentname *cnp) 275 { 276 277 if (vp != NULL) { 278 struct nfsnode *np = VTONFS(vp); 279 280 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 281 } else { 282 struct nfsnode *dnp = VTONFS(dvp); 283 284 if (!timespecisset(&dnp->n_nctime)) 285 dnp->n_nctime = dnp->n_vattr->va_mtime; 286 } 287 288 cache_enter(dvp, vp, cnp); 289 } 290 291 /* 292 * nfs null call from vfs. 293 */ 294 int 295 nfs_null(vp, cred, procp) 296 struct vnode *vp; 297 struct ucred *cred; 298 struct proc *procp; 299 { 300 caddr_t bpos, dpos; 301 int error = 0; 302 struct mbuf *mreq, *mrep, *md, *mb; 303 struct nfsnode *np = VTONFS(vp); 304 305 nfsm_reqhead(np, NFSPROC_NULL, 0); 306 nfsm_request(np, NFSPROC_NULL, procp, cred); 307 nfsm_reqdone; 308 return (error); 309 } 310 311 /* 312 * nfs access vnode op. 313 * For nfs version 2, just return ok. File accesses may fail later. 314 * For nfs version 3, use the access rpc to check accessibility. If file modes 315 * are changed on the server, accesses might still fail later. 316 */ 317 int 318 nfs_access(v) 319 void *v; 320 { 321 struct vop_access_args /* { 322 struct vnode *a_vp; 323 int a_mode; 324 struct ucred *a_cred; 325 struct proc *a_p; 326 } */ *ap = v; 327 struct vnode *vp = ap->a_vp; 328 u_int32_t *tl; 329 caddr_t cp; 330 int32_t t1, t2; 331 caddr_t bpos, dpos, cp2; 332 int error = 0, attrflag, cachevalid; 333 struct mbuf *mreq, *mrep, *md, *mb; 334 u_int32_t mode, rmode; 335 const int v3 = NFS_ISV3(vp); 336 struct nfsnode *np = VTONFS(vp); 337 338 cachevalid = (np->n_accstamp != -1 && 339 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 340 np->n_accuid == ap->a_cred->cr_uid); 341 342 /* 343 * Check access cache first. If this request has been made for this 344 * uid shortly before, use the cached result. 345 */ 346 if (cachevalid) { 347 if (!np->n_accerror) { 348 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 349 return np->n_accerror; 350 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 351 return np->n_accerror; 352 } 353 354 /* 355 * For nfs v3, do an access rpc, otherwise you are stuck emulating 356 * ufs_access() locally using the vattr. This may not be correct, 357 * since the server may apply other access criteria such as 358 * client uid-->server uid mapping that we do not know about, but 359 * this is better than just returning anything that is lying about 360 * in the cache. 361 */ 362 if (v3) { 363 nfsstats.rpccnt[NFSPROC_ACCESS]++; 364 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 365 nfsm_fhtom(np, v3); 366 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 367 if (ap->a_mode & VREAD) 368 mode = NFSV3ACCESS_READ; 369 else 370 mode = 0; 371 if (vp->v_type != VDIR) { 372 if (ap->a_mode & VWRITE) 373 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 374 if (ap->a_mode & VEXEC) 375 mode |= NFSV3ACCESS_EXECUTE; 376 } else { 377 if (ap->a_mode & VWRITE) 378 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 379 NFSV3ACCESS_DELETE); 380 if (ap->a_mode & VEXEC) 381 mode |= NFSV3ACCESS_LOOKUP; 382 } 383 *tl = txdr_unsigned(mode); 384 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 385 nfsm_postop_attr(vp, attrflag, 0); 386 if (!error) { 387 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 388 rmode = fxdr_unsigned(u_int32_t, *tl); 389 /* 390 * The NFS V3 spec does not clarify whether or not 391 * the returned access bits can be a superset of 392 * the ones requested, so... 393 */ 394 if ((rmode & mode) != mode) 395 error = EACCES; 396 } 397 nfsm_reqdone; 398 } else 399 return (nfsspec_access(ap)); 400 /* 401 * Disallow write attempts on filesystems mounted read-only; 402 * unless the file is a socket, fifo, or a block or character 403 * device resident on the filesystem. 404 */ 405 if (!error && (ap->a_mode & VWRITE) && 406 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 407 switch (vp->v_type) { 408 case VREG: 409 case VDIR: 410 case VLNK: 411 error = EROFS; 412 default: 413 break; 414 } 415 } 416 417 if (!error || error == EACCES) { 418 /* 419 * If we got the same result as for a previous, 420 * different request, OR it in. Don't update 421 * the timestamp in that case. 422 */ 423 if (cachevalid && np->n_accstamp != -1 && 424 error == np->n_accerror) { 425 if (!error) 426 np->n_accmode |= ap->a_mode; 427 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 428 np->n_accmode = ap->a_mode; 429 } else { 430 np->n_accstamp = time.tv_sec; 431 np->n_accuid = ap->a_cred->cr_uid; 432 np->n_accmode = ap->a_mode; 433 np->n_accerror = error; 434 } 435 } 436 437 return (error); 438 } 439 440 /* 441 * nfs open vnode op 442 * Check to see if the type is ok 443 * and that deletion is not in progress. 444 * For paged in text files, you will need to flush the page cache 445 * if consistency is lost. 446 */ 447 /* ARGSUSED */ 448 int 449 nfs_open(v) 450 void *v; 451 { 452 struct vop_open_args /* { 453 struct vnode *a_vp; 454 int a_mode; 455 struct ucred *a_cred; 456 struct proc *a_p; 457 } */ *ap = v; 458 struct vnode *vp = ap->a_vp; 459 struct nfsnode *np = VTONFS(vp); 460 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 461 struct vattr vattr; 462 int error; 463 464 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 465 return (EACCES); 466 } 467 468 if (ap->a_mode & FREAD) { 469 if (np->n_rcred != NULL) 470 crfree(np->n_rcred); 471 np->n_rcred = ap->a_cred; 472 crhold(np->n_rcred); 473 } 474 if (ap->a_mode & FWRITE) { 475 if (np->n_wcred != NULL) 476 crfree(np->n_wcred); 477 np->n_wcred = ap->a_cred; 478 crhold(np->n_wcred); 479 } 480 481 #ifndef NFS_V2_ONLY 482 /* 483 * Get a valid lease. If cached data is stale, flush it. 484 */ 485 if (nmp->nm_flag & NFSMNT_NQNFS) { 486 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 487 do { 488 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 489 ap->a_p); 490 } while (error == NQNFS_EXPIRED); 491 if (error) 492 return (error); 493 if (np->n_lrev != np->n_brev || 494 (np->n_flag & NQNFSNONCACHE)) { 495 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 496 ap->a_p, 1)) == EINTR) 497 return (error); 498 np->n_brev = np->n_lrev; 499 } 500 } 501 } else 502 #endif 503 { 504 if (np->n_flag & NMODIFIED) { 505 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 506 ap->a_p, 1)) == EINTR) 507 return (error); 508 NFS_INVALIDATE_ATTRCACHE(np); 509 if (vp->v_type == VDIR) { 510 nfs_invaldircache(vp, 0); 511 np->n_direofoffset = 0; 512 } 513 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 514 if (error) 515 return (error); 516 np->n_mtime = vattr.va_mtime; 517 } else { 518 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 519 if (error) 520 return (error); 521 if (timespeccmp(&np->n_mtime, &vattr.va_mtime, !=)) { 522 if (vp->v_type == VDIR) { 523 nfs_invaldircache(vp, 0); 524 np->n_direofoffset = 0; 525 } 526 if ((error = nfs_vinvalbuf(vp, V_SAVE, 527 ap->a_cred, ap->a_p, 1)) == EINTR) 528 return (error); 529 np->n_mtime = vattr.va_mtime; 530 } 531 } 532 } 533 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 534 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 535 return (0); 536 } 537 538 /* 539 * nfs close vnode op 540 * What an NFS client should do upon close after writing is a debatable issue. 541 * Most NFS clients push delayed writes to the server upon close, basically for 542 * two reasons: 543 * 1 - So that any write errors may be reported back to the client process 544 * doing the close system call. By far the two most likely errors are 545 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 546 * 2 - To put a worst case upper bound on cache inconsistency between 547 * multiple clients for the file. 548 * There is also a consistency problem for Version 2 of the protocol w.r.t. 549 * not being able to tell if other clients are writing a file concurrently, 550 * since there is no way of knowing if the changed modify time in the reply 551 * is only due to the write for this client. 552 * (NFS Version 3 provides weak cache consistency data in the reply that 553 * should be sufficient to detect and handle this case.) 554 * 555 * The current code does the following: 556 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 557 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 558 * or commit them (this satisfies 1 and 2 except for the 559 * case where the server crashes after this close but 560 * before the commit RPC, which is felt to be "good 561 * enough". Changing the last argument to nfs_flush() to 562 * a 1 would force a commit operation, if it is felt a 563 * commit is necessary now. 564 * for NQNFS - do nothing now, since 2 is dealt with via leases and 565 * 1 should be dealt with via an fsync() system call for 566 * cases where write errors are important. 567 */ 568 /* ARGSUSED */ 569 int 570 nfs_close(v) 571 void *v; 572 { 573 struct vop_close_args /* { 574 struct vnodeop_desc *a_desc; 575 struct vnode *a_vp; 576 int a_fflag; 577 struct ucred *a_cred; 578 struct proc *a_p; 579 } */ *ap = v; 580 struct vnode *vp = ap->a_vp; 581 struct nfsnode *np = VTONFS(vp); 582 int error = 0; 583 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 584 585 if (vp->v_type == VREG) { 586 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 587 (np->n_flag & NMODIFIED)) { 588 if (NFS_ISV3(vp)) { 589 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 590 np->n_flag &= ~NMODIFIED; 591 } else 592 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 593 NFS_INVALIDATE_ATTRCACHE(np); 594 } 595 if (np->n_flag & NWRITEERR) { 596 np->n_flag &= ~NWRITEERR; 597 error = np->n_error; 598 } 599 } 600 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 601 return (error); 602 } 603 604 /* 605 * nfs getattr call from vfs. 606 */ 607 int 608 nfs_getattr(v) 609 void *v; 610 { 611 struct vop_getattr_args /* { 612 struct vnode *a_vp; 613 struct vattr *a_vap; 614 struct ucred *a_cred; 615 struct proc *a_p; 616 } */ *ap = v; 617 struct vnode *vp = ap->a_vp; 618 struct nfsnode *np = VTONFS(vp); 619 caddr_t cp; 620 u_int32_t *tl; 621 int32_t t1, t2; 622 caddr_t bpos, dpos; 623 int error = 0; 624 struct mbuf *mreq, *mrep, *md, *mb; 625 const int v3 = NFS_ISV3(vp); 626 627 /* 628 * Update local times for special files. 629 */ 630 if (np->n_flag & (NACC | NUPD)) 631 np->n_flag |= NCHG; 632 633 /* 634 * if we have delayed truncation, do it now. 635 */ 636 nfs_delayedtruncate(vp); 637 638 /* 639 * First look in the cache. 640 */ 641 if (nfs_getattrcache(vp, ap->a_vap) == 0) 642 return (0); 643 nfsstats.rpccnt[NFSPROC_GETATTR]++; 644 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 645 nfsm_fhtom(np, v3); 646 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 647 if (!error) { 648 nfsm_loadattr(vp, ap->a_vap, 0); 649 if (vp->v_type == VDIR && 650 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 651 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 652 } 653 nfsm_reqdone; 654 return (error); 655 } 656 657 /* 658 * nfs setattr call. 659 */ 660 int 661 nfs_setattr(v) 662 void *v; 663 { 664 struct vop_setattr_args /* { 665 struct vnodeop_desc *a_desc; 666 struct vnode *a_vp; 667 struct vattr *a_vap; 668 struct ucred *a_cred; 669 struct proc *a_p; 670 } */ *ap = v; 671 struct vnode *vp = ap->a_vp; 672 struct nfsnode *np = VTONFS(vp); 673 struct vattr *vap = ap->a_vap; 674 int error = 0; 675 u_quad_t tsize = 0; 676 677 /* 678 * Setting of flags is not supported. 679 */ 680 if (vap->va_flags != VNOVAL) 681 return (EOPNOTSUPP); 682 683 /* 684 * Disallow write attempts if the filesystem is mounted read-only. 685 */ 686 if ((vap->va_uid != (uid_t)VNOVAL || 687 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 688 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 689 (vp->v_mount->mnt_flag & MNT_RDONLY)) 690 return (EROFS); 691 if (vap->va_size != VNOVAL) { 692 switch (vp->v_type) { 693 case VDIR: 694 return (EISDIR); 695 case VCHR: 696 case VBLK: 697 case VSOCK: 698 case VFIFO: 699 if (vap->va_mtime.tv_sec == VNOVAL && 700 vap->va_atime.tv_sec == VNOVAL && 701 vap->va_mode == (mode_t)VNOVAL && 702 vap->va_uid == (uid_t)VNOVAL && 703 vap->va_gid == (gid_t)VNOVAL) 704 return (0); 705 vap->va_size = VNOVAL; 706 break; 707 default: 708 /* 709 * Disallow write attempts if the filesystem is 710 * mounted read-only. 711 */ 712 if (vp->v_mount->mnt_flag & MNT_RDONLY) 713 return (EROFS); 714 uvm_vnp_setsize(vp, vap->va_size); 715 tsize = np->n_size; 716 np->n_size = vap->va_size; 717 if (vap->va_size == 0) 718 error = nfs_vinvalbuf(vp, 0, 719 ap->a_cred, ap->a_p, 1); 720 else 721 error = nfs_vinvalbuf(vp, V_SAVE, 722 ap->a_cred, ap->a_p, 1); 723 if (error) { 724 uvm_vnp_setsize(vp, tsize); 725 return (error); 726 } 727 np->n_vattr->va_size = vap->va_size; 728 } 729 } else if ((vap->va_mtime.tv_sec != VNOVAL || 730 vap->va_atime.tv_sec != VNOVAL) && 731 vp->v_type == VREG && 732 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 733 ap->a_p, 1)) == EINTR) 734 return (error); 735 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 736 if (error && vap->va_size != VNOVAL) { 737 np->n_size = np->n_vattr->va_size = tsize; 738 uvm_vnp_setsize(vp, np->n_size); 739 } 740 VN_KNOTE(vp, NOTE_ATTRIB); 741 return (error); 742 } 743 744 /* 745 * Do an nfs setattr rpc. 746 */ 747 int 748 nfs_setattrrpc(vp, vap, cred, procp) 749 struct vnode *vp; 750 struct vattr *vap; 751 struct ucred *cred; 752 struct proc *procp; 753 { 754 struct nfsv2_sattr *sp; 755 caddr_t cp; 756 int32_t t1, t2; 757 caddr_t bpos, dpos, cp2; 758 u_int32_t *tl; 759 int error = 0, wccflag = NFSV3_WCCRATTR; 760 struct mbuf *mreq, *mrep, *md, *mb; 761 const int v3 = NFS_ISV3(vp); 762 struct nfsnode *np = VTONFS(vp); 763 764 nfsstats.rpccnt[NFSPROC_SETATTR]++; 765 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 766 nfsm_fhtom(np, v3); 767 if (v3) { 768 nfsm_v3attrbuild(vap, TRUE); 769 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 770 *tl = nfs_false; 771 } else { 772 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 773 if (vap->va_mode == (mode_t)VNOVAL) 774 sp->sa_mode = nfs_xdrneg1; 775 else 776 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 777 if (vap->va_uid == (uid_t)VNOVAL) 778 sp->sa_uid = nfs_xdrneg1; 779 else 780 sp->sa_uid = txdr_unsigned(vap->va_uid); 781 if (vap->va_gid == (gid_t)VNOVAL) 782 sp->sa_gid = nfs_xdrneg1; 783 else 784 sp->sa_gid = txdr_unsigned(vap->va_gid); 785 sp->sa_size = txdr_unsigned(vap->va_size); 786 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 787 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 788 } 789 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 790 if (v3) { 791 nfsm_wcc_data(vp, wccflag, 0); 792 } else 793 nfsm_loadattr(vp, (struct vattr *)0, 0); 794 nfsm_reqdone; 795 return (error); 796 } 797 798 /* 799 * nfs lookup call, one step at a time... 800 * First look in cache 801 * If not found, unlock the directory nfsnode and do the rpc 802 * 803 * This code is full of lock/unlock statements and checks, because 804 * we continue after cache_lookup has finished (we need to check 805 * with the attr cache and do an rpc if it has timed out). This means 806 * that the locking effects of cache_lookup have to be taken into 807 * account. 808 */ 809 int 810 nfs_lookup(v) 811 void *v; 812 { 813 struct vop_lookup_args /* { 814 struct vnodeop_desc *a_desc; 815 struct vnode *a_dvp; 816 struct vnode **a_vpp; 817 struct componentname *a_cnp; 818 } */ *ap = v; 819 struct componentname *cnp = ap->a_cnp; 820 struct vnode *dvp = ap->a_dvp; 821 struct vnode **vpp = ap->a_vpp; 822 int flags; 823 struct vnode *newvp; 824 u_int32_t *tl; 825 caddr_t cp; 826 int32_t t1, t2; 827 caddr_t bpos, dpos, cp2; 828 struct mbuf *mreq, *mrep, *md, *mb; 829 long len; 830 nfsfh_t *fhp; 831 struct nfsnode *np; 832 int lockparent, wantparent, error = 0, attrflag, fhsize; 833 const int v3 = NFS_ISV3(dvp); 834 835 cnp->cn_flags &= ~PDIRUNLOCK; 836 flags = cnp->cn_flags; 837 838 *vpp = NULLVP; 839 newvp = NULLVP; 840 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 841 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 842 return (EROFS); 843 if (dvp->v_type != VDIR) 844 return (ENOTDIR); 845 846 lockparent = flags & LOCKPARENT; 847 wantparent = flags & (LOCKPARENT|WANTPARENT); 848 np = VTONFS(dvp); 849 850 /* 851 * Before tediously performing a linear scan of the directory, 852 * check the name cache to see if the directory/name pair 853 * we are looking for is known already. 854 * If the directory/name pair is found in the name cache, 855 * we have to ensure the directory has not changed from 856 * the time the cache entry has been created. If it has, 857 * the cache entry has to be ignored. 858 */ 859 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 860 struct vattr vattr; 861 int err2; 862 863 if (error && error != ENOENT) { 864 *vpp = NULLVP; 865 return error; 866 } 867 868 if (cnp->cn_flags & PDIRUNLOCK) { 869 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 870 if (err2 != 0) { 871 *vpp = NULLVP; 872 return err2; 873 } 874 cnp->cn_flags &= ~PDIRUNLOCK; 875 } 876 877 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 878 if (err2 != 0) { 879 if (error == 0) { 880 if (*vpp != dvp) 881 vput(*vpp); 882 else 883 vrele(*vpp); 884 } 885 *vpp = NULLVP; 886 return err2; 887 } 888 889 if (error == ENOENT) { 890 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 891 cnp->cn_proc) && timespeccmp(&vattr.va_mtime, 892 &VTONFS(dvp)->n_nctime, ==)) 893 return ENOENT; 894 cache_purge1(dvp, NULL, PURGE_CHILDREN); 895 timespecclear(&np->n_nctime); 896 goto dorpc; 897 } 898 899 newvp = *vpp; 900 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 901 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 902 { 903 nfsstats.lookupcache_hits++; 904 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 905 cnp->cn_flags |= SAVENAME; 906 if ((!lockparent || !(flags & ISLASTCN)) && 907 newvp != dvp) 908 VOP_UNLOCK(dvp, 0); 909 KASSERT(newvp->v_type != VNON); 910 return (0); 911 } 912 cache_purge1(newvp, NULL, PURGE_PARENTS); 913 if (newvp != dvp) 914 vput(newvp); 915 else 916 vrele(newvp); 917 *vpp = NULLVP; 918 } 919 dorpc: 920 /* 921 * because nfsv3 has the same CREATE semantics as ours, 922 * we don't have to perform LOOKUPs beforehand. 923 * 924 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 925 * XXX although we have no way to know if O_EXCL is requested or not. 926 */ 927 928 if (v3 && cnp->cn_nameiop == CREATE && 929 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 930 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 931 KASSERT(lockparent); 932 cnp->cn_flags |= SAVENAME; 933 return (EJUSTRETURN); 934 } 935 936 error = 0; 937 newvp = NULLVP; 938 nfsstats.lookupcache_misses++; 939 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 940 len = cnp->cn_namelen; 941 nfsm_reqhead(np, NFSPROC_LOOKUP, 942 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 943 nfsm_fhtom(np, v3); 944 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 945 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 946 if (error) { 947 nfsm_postop_attr(dvp, attrflag, 0); 948 m_freem(mrep); 949 goto nfsmout; 950 } 951 nfsm_getfh(fhp, fhsize, v3); 952 953 /* 954 * Handle RENAME case... 955 */ 956 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 957 if (NFS_CMPFH(np, fhp, fhsize)) { 958 m_freem(mrep); 959 return (EISDIR); 960 } 961 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 962 if (error) { 963 m_freem(mrep); 964 return error; 965 } 966 newvp = NFSTOV(np); 967 if (v3) { 968 nfsm_postop_attr(newvp, attrflag, 0); 969 nfsm_postop_attr(dvp, attrflag, 0); 970 } else 971 nfsm_loadattr(newvp, (struct vattr *)0, 0); 972 *vpp = newvp; 973 m_freem(mrep); 974 cnp->cn_flags |= SAVENAME; 975 if (!lockparent) { 976 VOP_UNLOCK(dvp, 0); 977 cnp->cn_flags |= PDIRUNLOCK; 978 } 979 goto validate; 980 } 981 982 /* 983 * The postop attr handling is duplicated for each if case, 984 * because it should be done while dvp is locked (unlocking 985 * dvp is different for each case). 986 */ 987 988 if (NFS_CMPFH(np, fhp, fhsize)) { 989 /* 990 * "." lookup 991 */ 992 VREF(dvp); 993 newvp = dvp; 994 if (v3) { 995 nfsm_postop_attr(newvp, attrflag, 0); 996 nfsm_postop_attr(dvp, attrflag, 0); 997 } else 998 nfsm_loadattr(newvp, (struct vattr *)0, 0); 999 } else if (flags & ISDOTDOT) { 1000 /* 1001 * ".." lookup 1002 */ 1003 VOP_UNLOCK(dvp, 0); 1004 cnp->cn_flags |= PDIRUNLOCK; 1005 1006 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1007 if (error) { 1008 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1009 cnp->cn_flags &= ~PDIRUNLOCK; 1010 m_freem(mrep); 1011 return error; 1012 } 1013 newvp = NFSTOV(np); 1014 1015 if (v3) { 1016 nfsm_postop_attr(newvp, attrflag, 0); 1017 nfsm_postop_attr(dvp, attrflag, 0); 1018 } else 1019 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1020 1021 if (lockparent && (flags & ISLASTCN)) { 1022 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1023 m_freem(mrep); 1024 vput(newvp); 1025 return error; 1026 } 1027 cnp->cn_flags &= ~PDIRUNLOCK; 1028 } 1029 } else { 1030 /* 1031 * Other lookups. 1032 */ 1033 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1034 if (error) { 1035 m_freem(mrep); 1036 return error; 1037 } 1038 newvp = NFSTOV(np); 1039 if (v3) { 1040 nfsm_postop_attr(newvp, attrflag, 0); 1041 nfsm_postop_attr(dvp, attrflag, 0); 1042 } else 1043 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1044 if (!lockparent || !(flags & ISLASTCN)) { 1045 VOP_UNLOCK(dvp, 0); 1046 cnp->cn_flags |= PDIRUNLOCK; 1047 } 1048 } 1049 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1050 cnp->cn_flags |= SAVENAME; 1051 if ((cnp->cn_flags & MAKEENTRY) && 1052 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1053 nfs_cache_enter(dvp, newvp, cnp); 1054 } 1055 *vpp = newvp; 1056 nfsm_reqdone; 1057 if (error) { 1058 /* 1059 * We get here only because of errors returned by 1060 * the RPC. Otherwise we'll have returned above 1061 * (the nfsm_* macros will jump to nfsm_reqdone 1062 * on error). 1063 */ 1064 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1065 cnp->cn_nameiop != CREATE) { 1066 nfs_cache_enter(dvp, NULL, cnp); 1067 } 1068 if (newvp != NULLVP) { 1069 vrele(newvp); 1070 if (newvp != dvp) 1071 VOP_UNLOCK(newvp, 0); 1072 } 1073 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1074 (flags & ISLASTCN) && error == ENOENT) { 1075 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1076 error = EROFS; 1077 else 1078 error = EJUSTRETURN; 1079 } 1080 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1081 cnp->cn_flags |= SAVENAME; 1082 *vpp = NULL; 1083 return error; 1084 } 1085 1086 validate: 1087 /* 1088 * make sure we have valid type and size. 1089 */ 1090 1091 newvp = *vpp; 1092 if (newvp->v_type == VNON) { 1093 struct vattr vattr; /* dummy */ 1094 1095 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1096 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc); 1097 if (error) { 1098 vput(newvp); 1099 *vpp = NULL; 1100 } 1101 } 1102 1103 return error; 1104 } 1105 1106 /* 1107 * nfs read call. 1108 * Just call nfs_bioread() to do the work. 1109 */ 1110 int 1111 nfs_read(v) 1112 void *v; 1113 { 1114 struct vop_read_args /* { 1115 struct vnode *a_vp; 1116 struct uio *a_uio; 1117 int a_ioflag; 1118 struct ucred *a_cred; 1119 } */ *ap = v; 1120 struct vnode *vp = ap->a_vp; 1121 1122 if (vp->v_type != VREG) 1123 return (EPERM); 1124 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1125 } 1126 1127 /* 1128 * nfs readlink call 1129 */ 1130 int 1131 nfs_readlink(v) 1132 void *v; 1133 { 1134 struct vop_readlink_args /* { 1135 struct vnode *a_vp; 1136 struct uio *a_uio; 1137 struct ucred *a_cred; 1138 } */ *ap = v; 1139 struct vnode *vp = ap->a_vp; 1140 1141 if (vp->v_type != VLNK) 1142 return (EPERM); 1143 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1144 } 1145 1146 /* 1147 * Do a readlink rpc. 1148 * Called by nfs_doio() from below the buffer cache. 1149 */ 1150 int 1151 nfs_readlinkrpc(vp, uiop, cred) 1152 struct vnode *vp; 1153 struct uio *uiop; 1154 struct ucred *cred; 1155 { 1156 u_int32_t *tl; 1157 caddr_t cp; 1158 int32_t t1, t2; 1159 caddr_t bpos, dpos, cp2; 1160 int error = 0, attrflag; 1161 uint32_t len; 1162 struct mbuf *mreq, *mrep, *md, *mb; 1163 const int v3 = NFS_ISV3(vp); 1164 struct nfsnode *np = VTONFS(vp); 1165 1166 nfsstats.rpccnt[NFSPROC_READLINK]++; 1167 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1168 nfsm_fhtom(np, v3); 1169 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1170 if (v3) 1171 nfsm_postop_attr(vp, attrflag, 0); 1172 if (!error) { 1173 if (v3) { 1174 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1175 len = fxdr_unsigned(uint32_t, *tl); 1176 if (len > MAXPATHLEN) { 1177 /* 1178 * this pathname is too long for us. 1179 */ 1180 m_freem(mrep); 1181 /* Solaris returns EINVAL. should we follow? */ 1182 error = ENAMETOOLONG; 1183 goto nfsmout; 1184 } 1185 } else { 1186 nfsm_strsiz(len, NFS_MAXPATHLEN); 1187 } 1188 nfsm_mtouio(uiop, len); 1189 } 1190 nfsm_reqdone; 1191 return (error); 1192 } 1193 1194 /* 1195 * nfs read rpc call 1196 * Ditto above 1197 */ 1198 int 1199 nfs_readrpc(vp, uiop) 1200 struct vnode *vp; 1201 struct uio *uiop; 1202 { 1203 u_int32_t *tl; 1204 caddr_t cp; 1205 int32_t t1, t2; 1206 caddr_t bpos, dpos, cp2; 1207 struct mbuf *mreq, *mrep, *md, *mb; 1208 struct nfsmount *nmp; 1209 int error = 0, len, retlen, tsiz, eof, attrflag; 1210 const int v3 = NFS_ISV3(vp); 1211 struct nfsnode *np = VTONFS(vp); 1212 1213 #ifndef nolint 1214 eof = 0; 1215 #endif 1216 nmp = VFSTONFS(vp->v_mount); 1217 tsiz = uiop->uio_resid; 1218 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1219 return (EFBIG); 1220 while (tsiz > 0) { 1221 nfsstats.rpccnt[NFSPROC_READ]++; 1222 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1223 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1224 nfsm_fhtom(np, v3); 1225 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1226 if (v3) { 1227 txdr_hyper(uiop->uio_offset, tl); 1228 *(tl + 2) = txdr_unsigned(len); 1229 } else { 1230 *tl++ = txdr_unsigned(uiop->uio_offset); 1231 *tl++ = txdr_unsigned(len); 1232 *tl = 0; 1233 } 1234 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, np->n_rcred); 1235 if (v3) { 1236 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1237 if (error) { 1238 m_freem(mrep); 1239 goto nfsmout; 1240 } 1241 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1242 eof = fxdr_unsigned(int, *(tl + 1)); 1243 } else 1244 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1245 nfsm_strsiz(retlen, nmp->nm_rsize); 1246 nfsm_mtouio(uiop, retlen); 1247 m_freem(mrep); 1248 tsiz -= retlen; 1249 if (v3) { 1250 if (eof || retlen == 0) 1251 tsiz = 0; 1252 } else if (retlen < len) 1253 tsiz = 0; 1254 } 1255 nfsmout: 1256 return (error); 1257 } 1258 1259 struct nfs_writerpc_context { 1260 struct simplelock nwc_slock; 1261 volatile int nwc_mbufcount; 1262 }; 1263 1264 /* 1265 * free mbuf used to refer protected pages while write rpc call. 1266 * called at splvm. 1267 */ 1268 static void 1269 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1270 { 1271 struct nfs_writerpc_context *ctx = arg; 1272 1273 KASSERT(m != NULL); 1274 KASSERT(ctx != NULL); 1275 pool_cache_put(&mbpool_cache, m); 1276 simple_lock(&ctx->nwc_slock); 1277 if (--ctx->nwc_mbufcount == 0) { 1278 wakeup(ctx); 1279 } 1280 simple_unlock(&ctx->nwc_slock); 1281 } 1282 1283 /* 1284 * nfs write call 1285 */ 1286 int 1287 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1288 struct vnode *vp; 1289 struct uio *uiop; 1290 int *iomode; 1291 boolean_t pageprotected; 1292 boolean_t *stalewriteverfp; 1293 { 1294 u_int32_t *tl; 1295 caddr_t cp; 1296 int32_t t1, t2; 1297 caddr_t bpos, dpos, cp2; 1298 struct mbuf *mreq, *mrep, *md, *mb; 1299 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1300 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1301 const int v3 = NFS_ISV3(vp); 1302 int committed = NFSV3WRITE_FILESYNC; 1303 struct nfsnode *np = VTONFS(vp); 1304 struct nfs_writerpc_context ctx; 1305 int s; 1306 struct lwp *l = NULL; 1307 size_t origresid; 1308 1309 simple_lock_init(&ctx.nwc_slock); 1310 ctx.nwc_mbufcount = 1; 1311 1312 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1313 panic("writerpc readonly vp %p", vp); 1314 } 1315 1316 #ifdef DIAGNOSTIC 1317 if (uiop->uio_iovcnt != 1) 1318 panic("nfs: writerpc iovcnt > 1"); 1319 #endif 1320 tsiz = uiop->uio_resid; 1321 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1322 return (EFBIG); 1323 if (pageprotected) { 1324 l = curlwp; 1325 PHOLD(l); 1326 } 1327 retry: 1328 origresid = uiop->uio_resid; 1329 KASSERT(origresid == uiop->uio_iov->iov_len); 1330 while (tsiz > 0) { 1331 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1332 uint32_t backup; 1333 boolean_t stalewriteverf = FALSE; 1334 1335 nfsstats.rpccnt[NFSPROC_WRITE]++; 1336 len = min(tsiz, nmp->nm_wsize); 1337 datalen = pageprotected ? 0 : nfsm_rndup(len); 1338 nfsm_reqhead(np, NFSPROC_WRITE, 1339 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1340 nfsm_fhtom(np, v3); 1341 if (v3) { 1342 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1343 txdr_hyper(uiop->uio_offset, tl); 1344 tl += 2; 1345 *tl++ = txdr_unsigned(len); 1346 *tl++ = txdr_unsigned(*iomode); 1347 *tl = txdr_unsigned(len); 1348 } else { 1349 u_int32_t x; 1350 1351 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1352 /* Set both "begin" and "current" to non-garbage. */ 1353 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1354 *tl++ = x; /* "begin offset" */ 1355 *tl++ = x; /* "current offset" */ 1356 x = txdr_unsigned(len); 1357 *tl++ = x; /* total to this offset */ 1358 *tl = x; /* size of this write */ 1359 1360 } 1361 if (pageprotected) { 1362 /* 1363 * since we know pages can't be modified during i/o, 1364 * no need to copy them for us. 1365 */ 1366 struct mbuf *m; 1367 struct iovec *iovp = uiop->uio_iov; 1368 1369 m = m_get(M_WAIT, MT_DATA); 1370 MCLAIM(m, &nfs_mowner); 1371 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1372 nfs_writerpc_extfree, &ctx); 1373 m->m_flags |= M_EXT_ROMAP; 1374 m->m_len = len; 1375 mb->m_next = m; 1376 /* 1377 * no need to maintain mb and bpos here 1378 * because no one care them later. 1379 */ 1380 #if 0 1381 mb = m; 1382 bpos = mtod(caddr_t, mb) + mb->m_len; 1383 #endif 1384 iovp->iov_base = (char *)iovp->iov_base + len; 1385 iovp->iov_len -= len; 1386 uiop->uio_offset += len; 1387 uiop->uio_resid -= len; 1388 s = splvm(); 1389 simple_lock(&ctx.nwc_slock); 1390 ctx.nwc_mbufcount++; 1391 simple_unlock(&ctx.nwc_slock); 1392 splx(s); 1393 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1394 } else { 1395 nfsm_uiotom(uiop, len); 1396 } 1397 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, np->n_wcred); 1398 if (v3) { 1399 wccflag = NFSV3_WCCCHK; 1400 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1401 if (!error) { 1402 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1403 + NFSX_V3WRITEVERF); 1404 rlen = fxdr_unsigned(int, *tl++); 1405 if (rlen == 0) { 1406 error = NFSERR_IO; 1407 m_freem(mrep); 1408 break; 1409 } else if (rlen < len) { 1410 backup = len - rlen; 1411 uiop->uio_iov->iov_base = 1412 (caddr_t)uiop->uio_iov->iov_base - 1413 backup; 1414 uiop->uio_iov->iov_len += backup; 1415 uiop->uio_offset -= backup; 1416 uiop->uio_resid += backup; 1417 len = rlen; 1418 } 1419 commit = fxdr_unsigned(int, *tl++); 1420 1421 /* 1422 * Return the lowest committment level 1423 * obtained by any of the RPCs. 1424 */ 1425 if (committed == NFSV3WRITE_FILESYNC) 1426 committed = commit; 1427 else if (committed == NFSV3WRITE_DATASYNC && 1428 commit == NFSV3WRITE_UNSTABLE) 1429 committed = commit; 1430 simple_lock(&nmp->nm_slock); 1431 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1432 memcpy(nmp->nm_writeverf, tl, 1433 NFSX_V3WRITEVERF); 1434 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1435 } else if ((nmp->nm_iflag & 1436 NFSMNT_STALEWRITEVERF) || 1437 memcmp(tl, nmp->nm_writeverf, 1438 NFSX_V3WRITEVERF)) { 1439 memcpy(nmp->nm_writeverf, tl, 1440 NFSX_V3WRITEVERF); 1441 /* 1442 * note NFSMNT_STALEWRITEVERF 1443 * if we're the first thread to 1444 * notice it. 1445 */ 1446 if ((nmp->nm_iflag & 1447 NFSMNT_STALEWRITEVERF) == 0) { 1448 stalewriteverf = TRUE; 1449 nmp->nm_iflag |= 1450 NFSMNT_STALEWRITEVERF; 1451 } 1452 } 1453 simple_unlock(&nmp->nm_slock); 1454 } 1455 } else 1456 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1457 if (wccflag) 1458 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1459 m_freem(mrep); 1460 if (error) 1461 break; 1462 tsiz -= len; 1463 if (stalewriteverf) { 1464 *stalewriteverfp = TRUE; 1465 stalewriteverf = FALSE; 1466 if (committed == NFSV3WRITE_UNSTABLE && 1467 len != origresid) { 1468 /* 1469 * if our write requests weren't atomic but 1470 * unstable, datas in previous iterations 1471 * might have already been lost now. 1472 * then, we should resend them to nfsd. 1473 */ 1474 backup = origresid - tsiz; 1475 uiop->uio_iov->iov_base = 1476 (caddr_t)uiop->uio_iov->iov_base - backup; 1477 uiop->uio_iov->iov_len += backup; 1478 uiop->uio_offset -= backup; 1479 uiop->uio_resid += backup; 1480 tsiz = origresid; 1481 goto retry; 1482 } 1483 } 1484 } 1485 if (pageprotected) { 1486 /* 1487 * wait until mbufs go away. 1488 * retransmitted mbufs can survive longer than rpc requests 1489 * themselves. 1490 */ 1491 s = splvm(); 1492 simple_lock(&ctx.nwc_slock); 1493 ctx.nwc_mbufcount--; 1494 while (ctx.nwc_mbufcount > 0) { 1495 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1496 } 1497 simple_unlock(&ctx.nwc_slock); 1498 splx(s); 1499 PRELE(l); 1500 } 1501 nfsmout: 1502 *iomode = committed; 1503 if (error) 1504 uiop->uio_resid = tsiz; 1505 return (error); 1506 } 1507 1508 /* 1509 * nfs mknod rpc 1510 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1511 * mode set to specify the file type and the size field for rdev. 1512 */ 1513 int 1514 nfs_mknodrpc(dvp, vpp, cnp, vap) 1515 struct vnode *dvp; 1516 struct vnode **vpp; 1517 struct componentname *cnp; 1518 struct vattr *vap; 1519 { 1520 struct nfsv2_sattr *sp; 1521 u_int32_t *tl; 1522 caddr_t cp; 1523 int32_t t1, t2; 1524 struct vnode *newvp = (struct vnode *)0; 1525 struct nfsnode *dnp, *np; 1526 char *cp2; 1527 caddr_t bpos, dpos; 1528 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1529 struct mbuf *mreq, *mrep, *md, *mb; 1530 u_int32_t rdev; 1531 const int v3 = NFS_ISV3(dvp); 1532 1533 if (vap->va_type == VCHR || vap->va_type == VBLK) 1534 rdev = txdr_unsigned(vap->va_rdev); 1535 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1536 rdev = nfs_xdrneg1; 1537 else { 1538 VOP_ABORTOP(dvp, cnp); 1539 vput(dvp); 1540 return (EOPNOTSUPP); 1541 } 1542 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1543 dnp = VTONFS(dvp); 1544 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1545 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1546 nfsm_fhtom(dnp, v3); 1547 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1548 if (v3) { 1549 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1550 *tl++ = vtonfsv3_type(vap->va_type); 1551 nfsm_v3attrbuild(vap, FALSE); 1552 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1553 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1554 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1555 *tl = txdr_unsigned(minor(vap->va_rdev)); 1556 } 1557 } else { 1558 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1559 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1560 sp->sa_uid = nfs_xdrneg1; 1561 sp->sa_gid = nfs_xdrneg1; 1562 sp->sa_size = rdev; 1563 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1564 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1565 } 1566 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1567 if (!error) { 1568 nfsm_mtofh(dvp, newvp, v3, gotvp); 1569 if (!gotvp) { 1570 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1571 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1572 if (!error) 1573 newvp = NFSTOV(np); 1574 } 1575 } 1576 if (v3) 1577 nfsm_wcc_data(dvp, wccflag, 0); 1578 nfsm_reqdone; 1579 if (error) { 1580 if (newvp) 1581 vput(newvp); 1582 } else { 1583 if (cnp->cn_flags & MAKEENTRY) 1584 nfs_cache_enter(dvp, newvp, cnp); 1585 *vpp = newvp; 1586 } 1587 PNBUF_PUT(cnp->cn_pnbuf); 1588 VTONFS(dvp)->n_flag |= NMODIFIED; 1589 if (!wccflag) 1590 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1591 vput(dvp); 1592 return (error); 1593 } 1594 1595 /* 1596 * nfs mknod vop 1597 * just call nfs_mknodrpc() to do the work. 1598 */ 1599 /* ARGSUSED */ 1600 int 1601 nfs_mknod(v) 1602 void *v; 1603 { 1604 struct vop_mknod_args /* { 1605 struct vnode *a_dvp; 1606 struct vnode **a_vpp; 1607 struct componentname *a_cnp; 1608 struct vattr *a_vap; 1609 } */ *ap = v; 1610 int error; 1611 1612 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1613 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1614 return (error); 1615 } 1616 1617 static u_long create_verf; 1618 /* 1619 * nfs file create call 1620 */ 1621 int 1622 nfs_create(v) 1623 void *v; 1624 { 1625 struct vop_create_args /* { 1626 struct vnode *a_dvp; 1627 struct vnode **a_vpp; 1628 struct componentname *a_cnp; 1629 struct vattr *a_vap; 1630 } */ *ap = v; 1631 struct vnode *dvp = ap->a_dvp; 1632 struct vattr *vap = ap->a_vap; 1633 struct componentname *cnp = ap->a_cnp; 1634 struct nfsv2_sattr *sp; 1635 u_int32_t *tl; 1636 caddr_t cp; 1637 int32_t t1, t2; 1638 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1639 struct vnode *newvp = (struct vnode *)0; 1640 caddr_t bpos, dpos, cp2; 1641 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1642 struct mbuf *mreq, *mrep, *md, *mb; 1643 const int v3 = NFS_ISV3(dvp); 1644 1645 /* 1646 * Oops, not for me.. 1647 */ 1648 if (vap->va_type == VSOCK) 1649 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1650 1651 #ifdef VA_EXCLUSIVE 1652 if (vap->va_vaflags & VA_EXCLUSIVE) 1653 fmode |= O_EXCL; 1654 #endif 1655 again: 1656 error = 0; 1657 nfsstats.rpccnt[NFSPROC_CREATE]++; 1658 dnp = VTONFS(dvp); 1659 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1660 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1661 nfsm_fhtom(dnp, v3); 1662 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1663 if (v3) { 1664 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1665 if (fmode & O_EXCL) { 1666 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1667 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1668 #ifdef INET 1669 if (TAILQ_FIRST(&in_ifaddr)) 1670 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1671 else 1672 *tl++ = create_verf; 1673 #else 1674 *tl++ = create_verf; 1675 #endif 1676 *tl = ++create_verf; 1677 } else { 1678 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1679 nfsm_v3attrbuild(vap, FALSE); 1680 } 1681 } else { 1682 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1683 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1684 sp->sa_uid = nfs_xdrneg1; 1685 sp->sa_gid = nfs_xdrneg1; 1686 sp->sa_size = 0; 1687 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1688 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1689 } 1690 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1691 if (!error) { 1692 nfsm_mtofh(dvp, newvp, v3, gotvp); 1693 if (!gotvp) { 1694 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1695 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1696 if (!error) 1697 newvp = NFSTOV(np); 1698 } 1699 } 1700 if (v3) 1701 nfsm_wcc_data(dvp, wccflag, 0); 1702 nfsm_reqdone; 1703 if (error) { 1704 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1705 fmode &= ~O_EXCL; 1706 goto again; 1707 } 1708 if (newvp) 1709 vput(newvp); 1710 } else if (v3 && (fmode & O_EXCL)) 1711 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1712 if (!error) { 1713 if (cnp->cn_flags & MAKEENTRY) 1714 nfs_cache_enter(dvp, newvp, cnp); 1715 *ap->a_vpp = newvp; 1716 } 1717 PNBUF_PUT(cnp->cn_pnbuf); 1718 VTONFS(dvp)->n_flag |= NMODIFIED; 1719 if (!wccflag) 1720 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1721 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1722 vput(dvp); 1723 return (error); 1724 } 1725 1726 /* 1727 * nfs file remove call 1728 * To try and make nfs semantics closer to ufs semantics, a file that has 1729 * other processes using the vnode is renamed instead of removed and then 1730 * removed later on the last close. 1731 * - If v_usecount > 1 1732 * If a rename is not already in the works 1733 * call nfs_sillyrename() to set it up 1734 * else 1735 * do the remove rpc 1736 */ 1737 int 1738 nfs_remove(v) 1739 void *v; 1740 { 1741 struct vop_remove_args /* { 1742 struct vnodeop_desc *a_desc; 1743 struct vnode * a_dvp; 1744 struct vnode * a_vp; 1745 struct componentname * a_cnp; 1746 } */ *ap = v; 1747 struct vnode *vp = ap->a_vp; 1748 struct vnode *dvp = ap->a_dvp; 1749 struct componentname *cnp = ap->a_cnp; 1750 struct nfsnode *np = VTONFS(vp); 1751 int error = 0; 1752 struct vattr vattr; 1753 1754 #ifndef DIAGNOSTIC 1755 if ((cnp->cn_flags & HASBUF) == 0) 1756 panic("nfs_remove: no name"); 1757 if (vp->v_usecount < 1) 1758 panic("nfs_remove: bad v_usecount"); 1759 #endif 1760 if (vp->v_type == VDIR) 1761 error = EPERM; 1762 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1763 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1764 vattr.va_nlink > 1)) { 1765 /* 1766 * Purge the name cache so that the chance of a lookup for 1767 * the name succeeding while the remove is in progress is 1768 * minimized. Without node locking it can still happen, such 1769 * that an I/O op returns ESTALE, but since you get this if 1770 * another host removes the file.. 1771 */ 1772 cache_purge(vp); 1773 /* 1774 * throw away biocache buffers, mainly to avoid 1775 * unnecessary delayed writes later. 1776 */ 1777 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1778 /* Do the rpc */ 1779 if (error != EINTR) 1780 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1781 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1782 /* 1783 * Kludge City: If the first reply to the remove rpc is lost.. 1784 * the reply to the retransmitted request will be ENOENT 1785 * since the file was in fact removed 1786 * Therefore, we cheat and return success. 1787 */ 1788 if (error == ENOENT) 1789 error = 0; 1790 } else if (!np->n_sillyrename) 1791 error = nfs_sillyrename(dvp, vp, cnp); 1792 PNBUF_PUT(cnp->cn_pnbuf); 1793 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1794 vattr.va_nlink == 1) { 1795 np->n_flag |= NREMOVED; 1796 } 1797 NFS_INVALIDATE_ATTRCACHE(np); 1798 VN_KNOTE(vp, NOTE_DELETE); 1799 VN_KNOTE(dvp, NOTE_WRITE); 1800 if (dvp == vp) 1801 vrele(vp); 1802 else 1803 vput(vp); 1804 vput(dvp); 1805 return (error); 1806 } 1807 1808 /* 1809 * nfs file remove rpc called from nfs_inactive 1810 */ 1811 int 1812 nfs_removeit(sp) 1813 struct sillyrename *sp; 1814 { 1815 1816 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1817 (struct proc *)0)); 1818 } 1819 1820 /* 1821 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1822 */ 1823 int 1824 nfs_removerpc(dvp, name, namelen, cred, proc) 1825 struct vnode *dvp; 1826 const char *name; 1827 int namelen; 1828 struct ucred *cred; 1829 struct proc *proc; 1830 { 1831 u_int32_t *tl; 1832 caddr_t cp; 1833 int32_t t1, t2; 1834 caddr_t bpos, dpos, cp2; 1835 int error = 0, wccflag = NFSV3_WCCRATTR; 1836 struct mbuf *mreq, *mrep, *md, *mb; 1837 const int v3 = NFS_ISV3(dvp); 1838 struct nfsnode *dnp = VTONFS(dvp); 1839 1840 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1841 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1842 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1843 nfsm_fhtom(dnp, v3); 1844 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1845 nfsm_request(dnp, NFSPROC_REMOVE, proc, cred); 1846 if (v3) 1847 nfsm_wcc_data(dvp, wccflag, 0); 1848 nfsm_reqdone; 1849 VTONFS(dvp)->n_flag |= NMODIFIED; 1850 if (!wccflag) 1851 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1852 return (error); 1853 } 1854 1855 /* 1856 * nfs file rename call 1857 */ 1858 int 1859 nfs_rename(v) 1860 void *v; 1861 { 1862 struct vop_rename_args /* { 1863 struct vnode *a_fdvp; 1864 struct vnode *a_fvp; 1865 struct componentname *a_fcnp; 1866 struct vnode *a_tdvp; 1867 struct vnode *a_tvp; 1868 struct componentname *a_tcnp; 1869 } */ *ap = v; 1870 struct vnode *fvp = ap->a_fvp; 1871 struct vnode *tvp = ap->a_tvp; 1872 struct vnode *fdvp = ap->a_fdvp; 1873 struct vnode *tdvp = ap->a_tdvp; 1874 struct componentname *tcnp = ap->a_tcnp; 1875 struct componentname *fcnp = ap->a_fcnp; 1876 int error; 1877 1878 #ifndef DIAGNOSTIC 1879 if ((tcnp->cn_flags & HASBUF) == 0 || 1880 (fcnp->cn_flags & HASBUF) == 0) 1881 panic("nfs_rename: no name"); 1882 #endif 1883 /* Check for cross-device rename */ 1884 if ((fvp->v_mount != tdvp->v_mount) || 1885 (tvp && (fvp->v_mount != tvp->v_mount))) { 1886 error = EXDEV; 1887 goto out; 1888 } 1889 1890 /* 1891 * If the tvp exists and is in use, sillyrename it before doing the 1892 * rename of the new file over it. 1893 */ 1894 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1895 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1896 VN_KNOTE(tvp, NOTE_DELETE); 1897 vput(tvp); 1898 tvp = NULL; 1899 } 1900 1901 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1902 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1903 tcnp->cn_proc); 1904 1905 VN_KNOTE(fdvp, NOTE_WRITE); 1906 VN_KNOTE(tdvp, NOTE_WRITE); 1907 if (fvp->v_type == VDIR) { 1908 if (tvp != NULL && tvp->v_type == VDIR) 1909 cache_purge(tdvp); 1910 cache_purge(fdvp); 1911 } 1912 out: 1913 if (tdvp == tvp) 1914 vrele(tdvp); 1915 else 1916 vput(tdvp); 1917 if (tvp) 1918 vput(tvp); 1919 vrele(fdvp); 1920 vrele(fvp); 1921 /* 1922 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1923 */ 1924 if (error == ENOENT) 1925 error = 0; 1926 return (error); 1927 } 1928 1929 /* 1930 * nfs file rename rpc called from nfs_remove() above 1931 */ 1932 int 1933 nfs_renameit(sdvp, scnp, sp) 1934 struct vnode *sdvp; 1935 struct componentname *scnp; 1936 struct sillyrename *sp; 1937 { 1938 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1939 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1940 } 1941 1942 /* 1943 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1944 */ 1945 int 1946 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1947 struct vnode *fdvp; 1948 const char *fnameptr; 1949 int fnamelen; 1950 struct vnode *tdvp; 1951 const char *tnameptr; 1952 int tnamelen; 1953 struct ucred *cred; 1954 struct proc *proc; 1955 { 1956 u_int32_t *tl; 1957 caddr_t cp; 1958 int32_t t1, t2; 1959 caddr_t bpos, dpos, cp2; 1960 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1961 struct mbuf *mreq, *mrep, *md, *mb; 1962 const int v3 = NFS_ISV3(fdvp); 1963 struct nfsnode *fdnp = VTONFS(fdvp); 1964 1965 nfsstats.rpccnt[NFSPROC_RENAME]++; 1966 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1967 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1968 nfsm_rndup(tnamelen)); 1969 nfsm_fhtom(fdnp, v3); 1970 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1971 nfsm_fhtom(VTONFS(tdvp), v3); 1972 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1973 nfsm_request(fdnp, NFSPROC_RENAME, proc, cred); 1974 if (v3) { 1975 nfsm_wcc_data(fdvp, fwccflag, 0); 1976 nfsm_wcc_data(tdvp, twccflag, 0); 1977 } 1978 nfsm_reqdone; 1979 VTONFS(fdvp)->n_flag |= NMODIFIED; 1980 VTONFS(tdvp)->n_flag |= NMODIFIED; 1981 if (!fwccflag) 1982 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 1983 if (!twccflag) 1984 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 1985 return (error); 1986 } 1987 1988 /* 1989 * nfs hard link create call 1990 */ 1991 int 1992 nfs_link(v) 1993 void *v; 1994 { 1995 struct vop_link_args /* { 1996 struct vnode *a_dvp; 1997 struct vnode *a_vp; 1998 struct componentname *a_cnp; 1999 } */ *ap = v; 2000 struct vnode *vp = ap->a_vp; 2001 struct vnode *dvp = ap->a_dvp; 2002 struct componentname *cnp = ap->a_cnp; 2003 u_int32_t *tl; 2004 caddr_t cp; 2005 int32_t t1, t2; 2006 caddr_t bpos, dpos, cp2; 2007 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2008 struct mbuf *mreq, *mrep, *md, *mb; 2009 /* XXX Should be const and initialised? */ 2010 int v3; 2011 struct nfsnode *np; 2012 2013 if (dvp->v_mount != vp->v_mount) { 2014 VOP_ABORTOP(dvp, cnp); 2015 vput(dvp); 2016 return (EXDEV); 2017 } 2018 if (dvp != vp) { 2019 error = vn_lock(vp, LK_EXCLUSIVE); 2020 if (error != 0) { 2021 VOP_ABORTOP(dvp, cnp); 2022 vput(dvp); 2023 return error; 2024 } 2025 } 2026 2027 /* 2028 * Push all writes to the server, so that the attribute cache 2029 * doesn't get "out of sync" with the server. 2030 * XXX There should be a better way! 2031 */ 2032 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 2033 2034 v3 = NFS_ISV3(vp); 2035 nfsstats.rpccnt[NFSPROC_LINK]++; 2036 np = VTONFS(vp); 2037 nfsm_reqhead(np, NFSPROC_LINK, 2038 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2039 nfsm_fhtom(np, v3); 2040 nfsm_fhtom(VTONFS(dvp), v3); 2041 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2042 nfsm_request(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 2043 if (v3) { 2044 nfsm_postop_attr(vp, attrflag, 0); 2045 nfsm_wcc_data(dvp, wccflag, 0); 2046 } 2047 nfsm_reqdone; 2048 PNBUF_PUT(cnp->cn_pnbuf); 2049 VTONFS(dvp)->n_flag |= NMODIFIED; 2050 if (!attrflag) 2051 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2052 if (!wccflag) 2053 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2054 if (dvp != vp) 2055 VOP_UNLOCK(vp, 0); 2056 VN_KNOTE(vp, NOTE_LINK); 2057 VN_KNOTE(dvp, NOTE_WRITE); 2058 vput(dvp); 2059 /* 2060 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2061 */ 2062 if (error == EEXIST) 2063 error = 0; 2064 return (error); 2065 } 2066 2067 /* 2068 * nfs symbolic link create call 2069 */ 2070 int 2071 nfs_symlink(v) 2072 void *v; 2073 { 2074 struct vop_symlink_args /* { 2075 struct vnode *a_dvp; 2076 struct vnode **a_vpp; 2077 struct componentname *a_cnp; 2078 struct vattr *a_vap; 2079 char *a_target; 2080 } */ *ap = v; 2081 struct vnode *dvp = ap->a_dvp; 2082 struct vattr *vap = ap->a_vap; 2083 struct componentname *cnp = ap->a_cnp; 2084 struct nfsv2_sattr *sp; 2085 u_int32_t *tl; 2086 caddr_t cp; 2087 int32_t t1, t2; 2088 caddr_t bpos, dpos, cp2; 2089 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2090 struct mbuf *mreq, *mrep, *md, *mb; 2091 struct vnode *newvp = (struct vnode *)0; 2092 const int v3 = NFS_ISV3(dvp); 2093 struct nfsnode *dnp = VTONFS(dvp); 2094 2095 *ap->a_vpp = NULL; 2096 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2097 slen = strlen(ap->a_target); 2098 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2099 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2100 nfsm_fhtom(dnp, v3); 2101 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2102 if (v3) 2103 nfsm_v3attrbuild(vap, FALSE); 2104 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2105 if (!v3) { 2106 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2107 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2108 sp->sa_uid = nfs_xdrneg1; 2109 sp->sa_gid = nfs_xdrneg1; 2110 sp->sa_size = nfs_xdrneg1; 2111 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2112 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2113 } 2114 nfsm_request(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 2115 if (v3) { 2116 if (!error) 2117 nfsm_mtofh(dvp, newvp, v3, gotvp); 2118 nfsm_wcc_data(dvp, wccflag, 0); 2119 } 2120 nfsm_reqdone; 2121 /* 2122 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2123 */ 2124 if (error == EEXIST) 2125 error = 0; 2126 if (error == 0 && newvp == NULL) { 2127 struct nfsnode *np = NULL; 2128 2129 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2130 cnp->cn_cred, cnp->cn_proc, &np); 2131 if (error == 0) 2132 newvp = NFSTOV(np); 2133 } 2134 if (error) { 2135 if (newvp != NULL) 2136 vput(newvp); 2137 } else { 2138 *ap->a_vpp = newvp; 2139 } 2140 PNBUF_PUT(cnp->cn_pnbuf); 2141 VTONFS(dvp)->n_flag |= NMODIFIED; 2142 if (!wccflag) 2143 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2144 VN_KNOTE(dvp, NOTE_WRITE); 2145 vput(dvp); 2146 return (error); 2147 } 2148 2149 /* 2150 * nfs make dir call 2151 */ 2152 int 2153 nfs_mkdir(v) 2154 void *v; 2155 { 2156 struct vop_mkdir_args /* { 2157 struct vnode *a_dvp; 2158 struct vnode **a_vpp; 2159 struct componentname *a_cnp; 2160 struct vattr *a_vap; 2161 } */ *ap = v; 2162 struct vnode *dvp = ap->a_dvp; 2163 struct vattr *vap = ap->a_vap; 2164 struct componentname *cnp = ap->a_cnp; 2165 struct nfsv2_sattr *sp; 2166 u_int32_t *tl; 2167 caddr_t cp; 2168 int32_t t1, t2; 2169 int len; 2170 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2171 struct vnode *newvp = (struct vnode *)0; 2172 caddr_t bpos, dpos, cp2; 2173 int error = 0, wccflag = NFSV3_WCCRATTR; 2174 int gotvp = 0; 2175 struct mbuf *mreq, *mrep, *md, *mb; 2176 const int v3 = NFS_ISV3(dvp); 2177 2178 len = cnp->cn_namelen; 2179 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2180 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2181 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2182 nfsm_fhtom(dnp, v3); 2183 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2184 if (v3) { 2185 nfsm_v3attrbuild(vap, FALSE); 2186 } else { 2187 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2188 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2189 sp->sa_uid = nfs_xdrneg1; 2190 sp->sa_gid = nfs_xdrneg1; 2191 sp->sa_size = nfs_xdrneg1; 2192 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2193 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2194 } 2195 nfsm_request(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 2196 if (!error) 2197 nfsm_mtofh(dvp, newvp, v3, gotvp); 2198 if (v3) 2199 nfsm_wcc_data(dvp, wccflag, 0); 2200 nfsm_reqdone; 2201 VTONFS(dvp)->n_flag |= NMODIFIED; 2202 if (!wccflag) 2203 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2204 /* 2205 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2206 * if we can succeed in looking up the directory. 2207 */ 2208 if (error == EEXIST || (!error && !gotvp)) { 2209 if (newvp) { 2210 vput(newvp); 2211 newvp = (struct vnode *)0; 2212 } 2213 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2214 cnp->cn_proc, &np); 2215 if (!error) { 2216 newvp = NFSTOV(np); 2217 if (newvp->v_type != VDIR || newvp == dvp) 2218 error = EEXIST; 2219 } 2220 } 2221 if (error) { 2222 if (newvp) { 2223 if (dvp != newvp) 2224 vput(newvp); 2225 else 2226 vrele(newvp); 2227 } 2228 } else { 2229 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2230 if (cnp->cn_flags & MAKEENTRY) 2231 nfs_cache_enter(dvp, newvp, cnp); 2232 *ap->a_vpp = newvp; 2233 } 2234 PNBUF_PUT(cnp->cn_pnbuf); 2235 vput(dvp); 2236 return (error); 2237 } 2238 2239 /* 2240 * nfs remove directory call 2241 */ 2242 int 2243 nfs_rmdir(v) 2244 void *v; 2245 { 2246 struct vop_rmdir_args /* { 2247 struct vnode *a_dvp; 2248 struct vnode *a_vp; 2249 struct componentname *a_cnp; 2250 } */ *ap = v; 2251 struct vnode *vp = ap->a_vp; 2252 struct vnode *dvp = ap->a_dvp; 2253 struct componentname *cnp = ap->a_cnp; 2254 u_int32_t *tl; 2255 caddr_t cp; 2256 int32_t t1, t2; 2257 caddr_t bpos, dpos, cp2; 2258 int error = 0, wccflag = NFSV3_WCCRATTR; 2259 struct mbuf *mreq, *mrep, *md, *mb; 2260 const int v3 = NFS_ISV3(dvp); 2261 struct nfsnode *dnp; 2262 2263 if (dvp == vp) { 2264 vrele(dvp); 2265 vput(dvp); 2266 PNBUF_PUT(cnp->cn_pnbuf); 2267 return (EINVAL); 2268 } 2269 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2270 dnp = VTONFS(dvp); 2271 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2272 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2273 nfsm_fhtom(dnp, v3); 2274 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2275 nfsm_request(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2276 if (v3) 2277 nfsm_wcc_data(dvp, wccflag, 0); 2278 nfsm_reqdone; 2279 PNBUF_PUT(cnp->cn_pnbuf); 2280 VTONFS(dvp)->n_flag |= NMODIFIED; 2281 if (!wccflag) 2282 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2283 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2284 VN_KNOTE(vp, NOTE_DELETE); 2285 cache_purge(vp); 2286 vput(vp); 2287 vput(dvp); 2288 /* 2289 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2290 */ 2291 if (error == ENOENT) 2292 error = 0; 2293 return (error); 2294 } 2295 2296 /* 2297 * nfs readdir call 2298 */ 2299 int 2300 nfs_readdir(v) 2301 void *v; 2302 { 2303 struct vop_readdir_args /* { 2304 struct vnode *a_vp; 2305 struct uio *a_uio; 2306 struct ucred *a_cred; 2307 int *a_eofflag; 2308 off_t **a_cookies; 2309 int *a_ncookies; 2310 } */ *ap = v; 2311 struct vnode *vp = ap->a_vp; 2312 struct uio *uio = ap->a_uio; 2313 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2314 char *base = uio->uio_iov->iov_base; 2315 int tresid, error; 2316 size_t count, lost; 2317 struct dirent *dp; 2318 off_t *cookies = NULL; 2319 int ncookies = 0, nc; 2320 2321 if (vp->v_type != VDIR) 2322 return (EPERM); 2323 2324 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2325 count = uio->uio_resid - lost; 2326 if (count <= 0) 2327 return (EINVAL); 2328 2329 /* 2330 * Call nfs_bioread() to do the real work. 2331 */ 2332 tresid = uio->uio_resid = count; 2333 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2334 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2335 2336 if (!error && ap->a_cookies) { 2337 ncookies = count / 16; 2338 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2339 *ap->a_cookies = cookies; 2340 } 2341 2342 if (!error && uio->uio_resid == tresid) { 2343 uio->uio_resid += lost; 2344 nfsstats.direofcache_misses++; 2345 if (ap->a_cookies) 2346 *ap->a_ncookies = 0; 2347 *ap->a_eofflag = 1; 2348 return (0); 2349 } 2350 2351 if (!error && ap->a_cookies) { 2352 /* 2353 * Only the NFS server and emulations use cookies, and they 2354 * load the directory block into system space, so we can 2355 * just look at it directly. 2356 */ 2357 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2358 panic("nfs_readdir: lost in space"); 2359 for (nc = 0; ncookies-- && 2360 base < (char *)uio->uio_iov->iov_base; nc++){ 2361 dp = (struct dirent *) base; 2362 if (dp->d_reclen == 0) 2363 break; 2364 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2365 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2366 else 2367 *(cookies++) = NFS_GETCOOKIE(dp); 2368 base += dp->d_reclen; 2369 } 2370 uio->uio_resid += 2371 ((caddr_t)uio->uio_iov->iov_base - base); 2372 uio->uio_iov->iov_len += 2373 ((caddr_t)uio->uio_iov->iov_base - base); 2374 uio->uio_iov->iov_base = base; 2375 *ap->a_ncookies = nc; 2376 } 2377 2378 uio->uio_resid += lost; 2379 *ap->a_eofflag = 0; 2380 return (error); 2381 } 2382 2383 /* 2384 * Readdir rpc call. 2385 * Called from below the buffer cache by nfs_doio(). 2386 */ 2387 int 2388 nfs_readdirrpc(vp, uiop, cred) 2389 struct vnode *vp; 2390 struct uio *uiop; 2391 struct ucred *cred; 2392 { 2393 int len, left; 2394 struct dirent *dp = NULL; 2395 u_int32_t *tl; 2396 caddr_t cp; 2397 int32_t t1, t2; 2398 caddr_t bpos, dpos, cp2; 2399 struct mbuf *mreq, *mrep, *md, *mb; 2400 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2401 struct nfsnode *dnp = VTONFS(vp); 2402 u_quad_t fileno; 2403 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2404 int attrflag, nrpcs = 0, reclen; 2405 const int v3 = NFS_ISV3(vp); 2406 2407 #ifdef DIAGNOSTIC 2408 /* 2409 * Should be called from buffer cache, so only amount of 2410 * NFS_DIRBLKSIZ will be requested. 2411 */ 2412 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2413 panic("nfs readdirrpc bad uio"); 2414 #endif 2415 2416 /* 2417 * Loop around doing readdir rpc's of size nm_readdirsize 2418 * truncated to a multiple of NFS_DIRFRAGSIZ. 2419 * The stopping criteria is EOF or buffer full. 2420 */ 2421 while (more_dirs && bigenough) { 2422 /* 2423 * Heuristic: don't bother to do another RPC to further 2424 * fill up this block if there is not much room left. (< 50% 2425 * of the readdir RPC size). This wastes some buffer space 2426 * but can save up to 50% in RPC calls. 2427 */ 2428 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2429 bigenough = 0; 2430 break; 2431 } 2432 nfsstats.rpccnt[NFSPROC_READDIR]++; 2433 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2434 NFSX_READDIR(v3)); 2435 nfsm_fhtom(dnp, v3); 2436 if (v3) { 2437 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2438 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2439 txdr_swapcookie3(uiop->uio_offset, tl); 2440 } else { 2441 txdr_cookie3(uiop->uio_offset, tl); 2442 } 2443 tl += 2; 2444 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2445 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2446 } else { 2447 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2448 *tl++ = txdr_unsigned(uiop->uio_offset); 2449 } 2450 *tl = txdr_unsigned(nmp->nm_readdirsize); 2451 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2452 nrpcs++; 2453 if (v3) { 2454 nfsm_postop_attr(vp, attrflag, 0); 2455 if (!error) { 2456 nfsm_dissect(tl, u_int32_t *, 2457 2 * NFSX_UNSIGNED); 2458 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2459 dnp->n_cookieverf.nfsuquad[1] = *tl; 2460 } else { 2461 m_freem(mrep); 2462 goto nfsmout; 2463 } 2464 } 2465 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2466 more_dirs = fxdr_unsigned(int, *tl); 2467 2468 /* loop thru the dir entries, doctoring them to 4bsd form */ 2469 while (more_dirs && bigenough) { 2470 if (v3) { 2471 nfsm_dissect(tl, u_int32_t *, 2472 3 * NFSX_UNSIGNED); 2473 fileno = fxdr_hyper(tl); 2474 len = fxdr_unsigned(int, *(tl + 2)); 2475 } else { 2476 nfsm_dissect(tl, u_int32_t *, 2477 2 * NFSX_UNSIGNED); 2478 fileno = fxdr_unsigned(u_quad_t, *tl++); 2479 len = fxdr_unsigned(int, *tl); 2480 } 2481 if (len <= 0 || len > NFS_MAXNAMLEN) { 2482 error = EBADRPC; 2483 m_freem(mrep); 2484 goto nfsmout; 2485 } 2486 tlen = nfsm_rndup(len); 2487 if (tlen == len) 2488 tlen += 4; /* To ensure null termination */ 2489 tlen += sizeof (off_t) + sizeof (int); 2490 reclen = ALIGN(tlen + DIRHDSIZ); 2491 tlen = reclen - DIRHDSIZ; 2492 left = NFS_DIRFRAGSIZ - blksiz; 2493 if (reclen > left) { 2494 dp->d_reclen += left; 2495 uiop->uio_iov->iov_base = 2496 (caddr_t)uiop->uio_iov->iov_base + left; 2497 uiop->uio_iov->iov_len -= left; 2498 uiop->uio_resid -= left; 2499 blksiz = 0; 2500 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2501 } 2502 if (reclen > uiop->uio_resid) 2503 bigenough = 0; 2504 if (bigenough) { 2505 dp = (struct dirent *)uiop->uio_iov->iov_base; 2506 dp->d_fileno = (int)fileno; 2507 dp->d_namlen = len; 2508 dp->d_reclen = reclen; 2509 dp->d_type = DT_UNKNOWN; 2510 blksiz += dp->d_reclen; 2511 if (blksiz == NFS_DIRFRAGSIZ) 2512 blksiz = 0; 2513 uiop->uio_resid -= DIRHDSIZ; 2514 uiop->uio_iov->iov_base = 2515 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2516 uiop->uio_iov->iov_len -= DIRHDSIZ; 2517 nfsm_mtouio(uiop, len); 2518 cp = uiop->uio_iov->iov_base; 2519 tlen -= len; 2520 *cp = '\0'; /* null terminate */ 2521 uiop->uio_iov->iov_base = 2522 (caddr_t)uiop->uio_iov->iov_base + tlen; 2523 uiop->uio_iov->iov_len -= tlen; 2524 uiop->uio_resid -= tlen; 2525 } else 2526 nfsm_adv(nfsm_rndup(len)); 2527 if (v3) { 2528 nfsm_dissect(tl, u_int32_t *, 2529 3 * NFSX_UNSIGNED); 2530 } else { 2531 nfsm_dissect(tl, u_int32_t *, 2532 2 * NFSX_UNSIGNED); 2533 } 2534 if (bigenough) { 2535 if (v3) { 2536 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2537 uiop->uio_offset = 2538 fxdr_swapcookie3(tl); 2539 else 2540 uiop->uio_offset = 2541 fxdr_cookie3(tl); 2542 } 2543 else { 2544 uiop->uio_offset = 2545 fxdr_unsigned(off_t, *tl); 2546 } 2547 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2548 } 2549 if (v3) 2550 tl += 2; 2551 else 2552 tl++; 2553 more_dirs = fxdr_unsigned(int, *tl); 2554 } 2555 /* 2556 * If at end of rpc data, get the eof boolean 2557 */ 2558 if (!more_dirs) { 2559 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2560 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2561 } 2562 m_freem(mrep); 2563 } 2564 /* 2565 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2566 * by increasing d_reclen for the last record. 2567 */ 2568 if (blksiz > 0) { 2569 left = NFS_DIRFRAGSIZ - blksiz; 2570 dp->d_reclen += left; 2571 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2572 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2573 left; 2574 uiop->uio_iov->iov_len -= left; 2575 uiop->uio_resid -= left; 2576 } 2577 2578 /* 2579 * We are now either at the end of the directory or have filled the 2580 * block. 2581 */ 2582 if (bigenough) 2583 dnp->n_direofoffset = uiop->uio_offset; 2584 nfsmout: 2585 return (error); 2586 } 2587 2588 /* 2589 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2590 */ 2591 int 2592 nfs_readdirplusrpc(vp, uiop, cred) 2593 struct vnode *vp; 2594 struct uio *uiop; 2595 struct ucred *cred; 2596 { 2597 int len, left; 2598 struct dirent *dp = NULL; 2599 u_int32_t *tl; 2600 caddr_t cp; 2601 int32_t t1, t2; 2602 struct vnode *newvp; 2603 caddr_t bpos, dpos, cp2; 2604 struct mbuf *mreq, *mrep, *md, *mb; 2605 struct nameidata nami, *ndp = &nami; 2606 struct componentname *cnp = &ndp->ni_cnd; 2607 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2608 struct nfsnode *dnp = VTONFS(vp), *np; 2609 nfsfh_t *fhp; 2610 u_quad_t fileno; 2611 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2612 int attrflag, fhsize, nrpcs = 0, reclen; 2613 struct nfs_fattr fattr, *fp; 2614 2615 #ifdef DIAGNOSTIC 2616 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2617 panic("nfs readdirplusrpc bad uio"); 2618 #endif 2619 ndp->ni_dvp = vp; 2620 newvp = NULLVP; 2621 2622 /* 2623 * Loop around doing readdir rpc's of size nm_readdirsize 2624 * truncated to a multiple of NFS_DIRFRAGSIZ. 2625 * The stopping criteria is EOF or buffer full. 2626 */ 2627 while (more_dirs && bigenough) { 2628 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2629 bigenough = 0; 2630 break; 2631 } 2632 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2633 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2634 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2635 nfsm_fhtom(dnp, 1); 2636 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2637 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2638 txdr_swapcookie3(uiop->uio_offset, tl); 2639 } else { 2640 txdr_cookie3(uiop->uio_offset, tl); 2641 } 2642 tl += 2; 2643 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2644 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2645 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2646 *tl = txdr_unsigned(nmp->nm_rsize); 2647 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2648 nfsm_postop_attr(vp, attrflag, 0); 2649 if (error) { 2650 m_freem(mrep); 2651 goto nfsmout; 2652 } 2653 nrpcs++; 2654 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2655 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2656 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2657 more_dirs = fxdr_unsigned(int, *tl); 2658 2659 /* loop thru the dir entries, doctoring them to 4bsd form */ 2660 while (more_dirs && bigenough) { 2661 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2662 fileno = fxdr_hyper(tl); 2663 len = fxdr_unsigned(int, *(tl + 2)); 2664 if (len <= 0 || len > NFS_MAXNAMLEN) { 2665 error = EBADRPC; 2666 m_freem(mrep); 2667 goto nfsmout; 2668 } 2669 tlen = nfsm_rndup(len); 2670 if (tlen == len) 2671 tlen += 4; /* To ensure null termination*/ 2672 tlen += sizeof (off_t) + sizeof (int); 2673 reclen = ALIGN(tlen + DIRHDSIZ); 2674 tlen = reclen - DIRHDSIZ; 2675 left = NFS_DIRFRAGSIZ - blksiz; 2676 if (reclen > left) { 2677 /* 2678 * DIRFRAGSIZ is aligned, no need to align 2679 * again here. 2680 */ 2681 dp->d_reclen += left; 2682 uiop->uio_iov->iov_base = 2683 (caddr_t)uiop->uio_iov->iov_base + left; 2684 uiop->uio_iov->iov_len -= left; 2685 uiop->uio_resid -= left; 2686 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2687 blksiz = 0; 2688 } 2689 if (reclen > uiop->uio_resid) 2690 bigenough = 0; 2691 if (bigenough) { 2692 dp = (struct dirent *)uiop->uio_iov->iov_base; 2693 dp->d_fileno = (int)fileno; 2694 dp->d_namlen = len; 2695 dp->d_reclen = reclen; 2696 dp->d_type = DT_UNKNOWN; 2697 blksiz += dp->d_reclen; 2698 if (blksiz == NFS_DIRFRAGSIZ) 2699 blksiz = 0; 2700 uiop->uio_resid -= DIRHDSIZ; 2701 uiop->uio_iov->iov_base = 2702 (caddr_t)uiop->uio_iov->iov_base + 2703 DIRHDSIZ; 2704 uiop->uio_iov->iov_len -= DIRHDSIZ; 2705 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2706 cnp->cn_namelen = len; 2707 nfsm_mtouio(uiop, len); 2708 cp = uiop->uio_iov->iov_base; 2709 tlen -= len; 2710 *cp = '\0'; 2711 uiop->uio_iov->iov_base = 2712 (caddr_t)uiop->uio_iov->iov_base + tlen; 2713 uiop->uio_iov->iov_len -= tlen; 2714 uiop->uio_resid -= tlen; 2715 } else 2716 nfsm_adv(nfsm_rndup(len)); 2717 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2718 if (bigenough) { 2719 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2720 uiop->uio_offset = 2721 fxdr_swapcookie3(tl); 2722 else 2723 uiop->uio_offset = 2724 fxdr_cookie3(tl); 2725 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2726 } 2727 tl += 2; 2728 2729 /* 2730 * Since the attributes are before the file handle 2731 * (sigh), we must skip over the attributes and then 2732 * come back and get them. 2733 */ 2734 attrflag = fxdr_unsigned(int, *tl); 2735 if (attrflag) { 2736 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2737 memcpy(&fattr, fp, NFSX_V3FATTR); 2738 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2739 doit = fxdr_unsigned(int, *tl); 2740 if (doit) { 2741 nfsm_getfh(fhp, fhsize, 1); 2742 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2743 VREF(vp); 2744 newvp = vp; 2745 np = dnp; 2746 } else { 2747 error = nfs_nget1(vp->v_mount, fhp, 2748 fhsize, &np, LK_NOWAIT); 2749 if (!error) 2750 newvp = NFSTOV(np); 2751 } 2752 if (!error) { 2753 const char *cp; 2754 2755 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2756 dp->d_type = 2757 IFTODT(VTTOIF(np->n_vattr->va_type)); 2758 ndp->ni_vp = newvp; 2759 cp = cnp->cn_nameptr + cnp->cn_namelen; 2760 cnp->cn_hash = 2761 namei_hash(cnp->cn_nameptr, &cp); 2762 if (cnp->cn_namelen <= NCHNAMLEN) { 2763 cache_purge1(ndp->ni_dvp, cnp, 0); 2764 nfs_cache_enter(ndp->ni_dvp, ndp->ni_vp, 2765 cnp); 2766 } 2767 } 2768 } 2769 } else { 2770 /* Just skip over the file handle */ 2771 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2772 i = fxdr_unsigned(int, *tl); 2773 nfsm_adv(nfsm_rndup(i)); 2774 } 2775 if (newvp != NULLVP) { 2776 if (newvp == vp) 2777 vrele(newvp); 2778 else 2779 vput(newvp); 2780 newvp = NULLVP; 2781 } 2782 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2783 more_dirs = fxdr_unsigned(int, *tl); 2784 } 2785 /* 2786 * If at end of rpc data, get the eof boolean 2787 */ 2788 if (!more_dirs) { 2789 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2790 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2791 } 2792 m_freem(mrep); 2793 } 2794 /* 2795 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2796 * by increasing d_reclen for the last record. 2797 */ 2798 if (blksiz > 0) { 2799 left = NFS_DIRFRAGSIZ - blksiz; 2800 dp->d_reclen += left; 2801 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2802 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2803 left; 2804 uiop->uio_iov->iov_len -= left; 2805 uiop->uio_resid -= left; 2806 } 2807 2808 /* 2809 * We are now either at the end of the directory or have filled the 2810 * block. 2811 */ 2812 if (bigenough) 2813 dnp->n_direofoffset = uiop->uio_offset; 2814 nfsmout: 2815 if (newvp != NULLVP) { 2816 if(newvp == vp) 2817 vrele(newvp); 2818 else 2819 vput(newvp); 2820 } 2821 return (error); 2822 } 2823 static char hextoasc[] = "0123456789abcdef"; 2824 2825 /* 2826 * Silly rename. To make the NFS filesystem that is stateless look a little 2827 * more like the "ufs" a remove of an active vnode is translated to a rename 2828 * to a funny looking filename that is removed by nfs_inactive on the 2829 * nfsnode. There is the potential for another process on a different client 2830 * to create the same funny name between the nfs_lookitup() fails and the 2831 * nfs_rename() completes, but... 2832 */ 2833 int 2834 nfs_sillyrename(dvp, vp, cnp) 2835 struct vnode *dvp, *vp; 2836 struct componentname *cnp; 2837 { 2838 struct sillyrename *sp; 2839 struct nfsnode *np; 2840 int error; 2841 short pid; 2842 2843 cache_purge(dvp); 2844 np = VTONFS(vp); 2845 #ifndef DIAGNOSTIC 2846 if (vp->v_type == VDIR) 2847 panic("nfs: sillyrename dir"); 2848 #endif 2849 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2850 M_NFSREQ, M_WAITOK); 2851 sp->s_cred = crdup(cnp->cn_cred); 2852 sp->s_dvp = dvp; 2853 VREF(dvp); 2854 2855 /* Fudge together a funny name */ 2856 pid = cnp->cn_proc->p_pid; 2857 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2858 sp->s_namlen = 12; 2859 sp->s_name[8] = hextoasc[pid & 0xf]; 2860 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2861 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2862 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2863 2864 /* Try lookitups until we get one that isn't there */ 2865 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2866 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2867 sp->s_name[4]++; 2868 if (sp->s_name[4] > 'z') { 2869 error = EINVAL; 2870 goto bad; 2871 } 2872 } 2873 error = nfs_renameit(dvp, cnp, sp); 2874 if (error) 2875 goto bad; 2876 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2877 cnp->cn_proc, &np); 2878 np->n_sillyrename = sp; 2879 return (0); 2880 bad: 2881 vrele(sp->s_dvp); 2882 crfree(sp->s_cred); 2883 free((caddr_t)sp, M_NFSREQ); 2884 return (error); 2885 } 2886 2887 /* 2888 * Look up a file name and optionally either update the file handle or 2889 * allocate an nfsnode, depending on the value of npp. 2890 * npp == NULL --> just do the lookup 2891 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2892 * handled too 2893 * *npp != NULL --> update the file handle in the vnode 2894 */ 2895 int 2896 nfs_lookitup(dvp, name, len, cred, procp, npp) 2897 struct vnode *dvp; 2898 const char *name; 2899 int len; 2900 struct ucred *cred; 2901 struct proc *procp; 2902 struct nfsnode **npp; 2903 { 2904 u_int32_t *tl; 2905 caddr_t cp; 2906 int32_t t1, t2; 2907 struct vnode *newvp = (struct vnode *)0; 2908 struct nfsnode *np, *dnp = VTONFS(dvp); 2909 caddr_t bpos, dpos, cp2; 2910 int error = 0, fhlen, attrflag; 2911 struct mbuf *mreq, *mrep, *md, *mb; 2912 nfsfh_t *nfhp; 2913 const int v3 = NFS_ISV3(dvp); 2914 2915 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2916 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2917 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2918 nfsm_fhtom(dnp, v3); 2919 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2920 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2921 if (npp && !error) { 2922 nfsm_getfh(nfhp, fhlen, v3); 2923 if (*npp) { 2924 np = *npp; 2925 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2926 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2927 np->n_fhp = &np->n_fh; 2928 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2929 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2930 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2931 np->n_fhsize = fhlen; 2932 newvp = NFSTOV(np); 2933 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2934 VREF(dvp); 2935 newvp = dvp; 2936 np = dnp; 2937 } else { 2938 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2939 if (error) { 2940 m_freem(mrep); 2941 return (error); 2942 } 2943 newvp = NFSTOV(np); 2944 } 2945 if (v3) { 2946 nfsm_postop_attr(newvp, attrflag, 0); 2947 if (!attrflag && *npp == NULL) { 2948 m_freem(mrep); 2949 vput(newvp); 2950 return (ENOENT); 2951 } 2952 } else 2953 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2954 } 2955 nfsm_reqdone; 2956 if (npp && *npp == NULL) { 2957 if (error) { 2958 if (newvp) 2959 vput(newvp); 2960 } else 2961 *npp = np; 2962 } 2963 return (error); 2964 } 2965 2966 /* 2967 * Nfs Version 3 commit rpc 2968 */ 2969 int 2970 nfs_commit(vp, offset, cnt, procp) 2971 struct vnode *vp; 2972 off_t offset; 2973 uint32_t cnt; 2974 struct proc *procp; 2975 { 2976 caddr_t cp; 2977 u_int32_t *tl; 2978 int32_t t1, t2; 2979 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2980 caddr_t bpos, dpos, cp2; 2981 int error = 0, wccflag = NFSV3_WCCRATTR; 2982 struct mbuf *mreq, *mrep, *md, *mb; 2983 struct nfsnode *np; 2984 2985 KASSERT(NFS_ISV3(vp)); 2986 2987 #ifdef NFS_DEBUG_COMMIT 2988 printf("commit %lu - %lu\n", (unsigned long)offset, 2989 (unsigned long)(offset + cnt)); 2990 #endif 2991 2992 simple_lock(&nmp->nm_slock); 2993 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 2994 simple_unlock(&nmp->nm_slock); 2995 return (0); 2996 } 2997 simple_unlock(&nmp->nm_slock); 2998 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2999 np = VTONFS(vp); 3000 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3001 nfsm_fhtom(np, 1); 3002 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3003 txdr_hyper(offset, tl); 3004 tl += 2; 3005 *tl = txdr_unsigned(cnt); 3006 nfsm_request(np, NFSPROC_COMMIT, procp, np->n_wcred); 3007 nfsm_wcc_data(vp, wccflag, 0); 3008 if (!error) { 3009 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3010 simple_lock(&nmp->nm_slock); 3011 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3012 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3013 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3014 error = NFSERR_STALEWRITEVERF; 3015 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3016 } 3017 simple_unlock(&nmp->nm_slock); 3018 } 3019 nfsm_reqdone; 3020 return (error); 3021 } 3022 3023 /* 3024 * Kludge City.. 3025 * - make nfs_bmap() essentially a no-op that does no translation 3026 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3027 * (Maybe I could use the process's page mapping, but I was concerned that 3028 * Kernel Write might not be enabled and also figured copyout() would do 3029 * a lot more work than memcpy() and also it currently happens in the 3030 * context of the swapper process (2). 3031 */ 3032 int 3033 nfs_bmap(v) 3034 void *v; 3035 { 3036 struct vop_bmap_args /* { 3037 struct vnode *a_vp; 3038 daddr_t a_bn; 3039 struct vnode **a_vpp; 3040 daddr_t *a_bnp; 3041 int *a_runp; 3042 } */ *ap = v; 3043 struct vnode *vp = ap->a_vp; 3044 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3045 3046 if (ap->a_vpp != NULL) 3047 *ap->a_vpp = vp; 3048 if (ap->a_bnp != NULL) 3049 *ap->a_bnp = ap->a_bn << bshift; 3050 if (ap->a_runp != NULL) 3051 *ap->a_runp = 1024 * 1024; /* XXX */ 3052 return (0); 3053 } 3054 3055 /* 3056 * Strategy routine. 3057 * For async requests when nfsiod(s) are running, queue the request by 3058 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3059 * request. 3060 */ 3061 int 3062 nfs_strategy(v) 3063 void *v; 3064 { 3065 struct vop_strategy_args *ap = v; 3066 struct buf *bp = ap->a_bp; 3067 struct proc *p; 3068 int error = 0; 3069 3070 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3071 panic("nfs physio/async"); 3072 if (bp->b_flags & B_ASYNC) 3073 p = NULL; 3074 else 3075 p = curproc; /* XXX */ 3076 3077 /* 3078 * If the op is asynchronous and an i/o daemon is waiting 3079 * queue the request, wake it up and wait for completion 3080 * otherwise just do it ourselves. 3081 */ 3082 3083 if ((bp->b_flags & B_ASYNC) == 0 || 3084 nfs_asyncio(bp)) 3085 error = nfs_doio(bp, p); 3086 return (error); 3087 } 3088 3089 /* 3090 * fsync vnode op. Just call nfs_flush() with commit == 1. 3091 */ 3092 /* ARGSUSED */ 3093 int 3094 nfs_fsync(v) 3095 void *v; 3096 { 3097 struct vop_fsync_args /* { 3098 struct vnodeop_desc *a_desc; 3099 struct vnode * a_vp; 3100 struct ucred * a_cred; 3101 int a_flags; 3102 off_t offlo; 3103 off_t offhi; 3104 struct proc * a_p; 3105 } */ *ap = v; 3106 3107 struct vnode *vp = ap->a_vp; 3108 3109 if (vp->v_type != VREG) 3110 return 0; 3111 3112 return (nfs_flush(vp, ap->a_cred, 3113 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3114 } 3115 3116 /* 3117 * Flush all the data associated with a vnode. 3118 */ 3119 int 3120 nfs_flush(vp, cred, waitfor, p, commit) 3121 struct vnode *vp; 3122 struct ucred *cred; 3123 int waitfor; 3124 struct proc *p; 3125 int commit; 3126 { 3127 struct nfsnode *np = VTONFS(vp); 3128 int error; 3129 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3130 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3131 3132 simple_lock(&vp->v_interlock); 3133 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3134 if (np->n_flag & NWRITEERR) { 3135 error = np->n_error; 3136 np->n_flag &= ~NWRITEERR; 3137 } 3138 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3139 return (error); 3140 } 3141 3142 /* 3143 * Return POSIX pathconf information applicable to nfs. 3144 * 3145 * N.B. The NFS V2 protocol doesn't support this RPC. 3146 */ 3147 /* ARGSUSED */ 3148 int 3149 nfs_pathconf(v) 3150 void *v; 3151 { 3152 struct vop_pathconf_args /* { 3153 struct vnode *a_vp; 3154 int a_name; 3155 register_t *a_retval; 3156 } */ *ap = v; 3157 struct nfsv3_pathconf *pcp; 3158 struct vnode *vp = ap->a_vp; 3159 struct mbuf *mreq, *mrep, *md, *mb; 3160 int32_t t1, t2; 3161 u_int32_t *tl; 3162 caddr_t bpos, dpos, cp, cp2; 3163 int error = 0, attrflag; 3164 #ifndef NFS_V2_ONLY 3165 struct nfsmount *nmp; 3166 unsigned int l; 3167 u_int64_t maxsize; 3168 #endif 3169 const int v3 = NFS_ISV3(vp); 3170 struct nfsnode *np = VTONFS(vp); 3171 3172 switch (ap->a_name) { 3173 /* Names that can be resolved locally. */ 3174 case _PC_PIPE_BUF: 3175 *ap->a_retval = PIPE_BUF; 3176 break; 3177 case _PC_SYNC_IO: 3178 *ap->a_retval = 1; 3179 break; 3180 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3181 case _PC_LINK_MAX: 3182 case _PC_NAME_MAX: 3183 case _PC_CHOWN_RESTRICTED: 3184 case _PC_NO_TRUNC: 3185 if (!v3) { 3186 error = EINVAL; 3187 break; 3188 } 3189 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3190 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3191 nfsm_fhtom(np, 1); 3192 nfsm_request(np, NFSPROC_PATHCONF, 3193 curproc, curproc->p_ucred); /* XXX */ 3194 nfsm_postop_attr(vp, attrflag, 0); 3195 if (!error) { 3196 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3197 NFSX_V3PATHCONF); 3198 switch (ap->a_name) { 3199 case _PC_LINK_MAX: 3200 *ap->a_retval = 3201 fxdr_unsigned(register_t, pcp->pc_linkmax); 3202 break; 3203 case _PC_NAME_MAX: 3204 *ap->a_retval = 3205 fxdr_unsigned(register_t, pcp->pc_namemax); 3206 break; 3207 case _PC_CHOWN_RESTRICTED: 3208 *ap->a_retval = 3209 (pcp->pc_chownrestricted == nfs_true); 3210 break; 3211 case _PC_NO_TRUNC: 3212 *ap->a_retval = 3213 (pcp->pc_notrunc == nfs_true); 3214 break; 3215 } 3216 } 3217 nfsm_reqdone; 3218 break; 3219 case _PC_FILESIZEBITS: 3220 #ifndef NFS_V2_ONLY 3221 if (v3) { 3222 nmp = VFSTONFS(vp->v_mount); 3223 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3224 if ((error = nfs_fsinfo(nmp, vp, 3225 curproc->p_ucred, curproc)) != 0) /* XXX */ 3226 break; 3227 for (l = 0, maxsize = nmp->nm_maxfilesize; 3228 (maxsize >> l) > 0; l++) 3229 ; 3230 *ap->a_retval = l + 1; 3231 } else 3232 #endif 3233 { 3234 *ap->a_retval = 32; /* NFS V2 limitation */ 3235 } 3236 break; 3237 default: 3238 error = EINVAL; 3239 break; 3240 } 3241 3242 return (error); 3243 } 3244 3245 /* 3246 * NFS advisory byte-level locks. 3247 */ 3248 int 3249 nfs_advlock(v) 3250 void *v; 3251 { 3252 struct vop_advlock_args /* { 3253 struct vnode *a_vp; 3254 caddr_t a_id; 3255 int a_op; 3256 struct flock *a_fl; 3257 int a_flags; 3258 } */ *ap = v; 3259 struct nfsnode *np = VTONFS(ap->a_vp); 3260 3261 return lf_advlock(ap, &np->n_lockf, np->n_size); 3262 } 3263 3264 /* 3265 * Print out the contents of an nfsnode. 3266 */ 3267 int 3268 nfs_print(v) 3269 void *v; 3270 { 3271 struct vop_print_args /* { 3272 struct vnode *a_vp; 3273 } */ *ap = v; 3274 struct vnode *vp = ap->a_vp; 3275 struct nfsnode *np = VTONFS(vp); 3276 3277 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3278 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3279 if (vp->v_type == VFIFO) 3280 fifo_printinfo(vp); 3281 printf("\n"); 3282 return (0); 3283 } 3284 3285 /* 3286 * NFS file truncation. 3287 */ 3288 int 3289 nfs_truncate(v) 3290 void *v; 3291 { 3292 #if 0 3293 struct vop_truncate_args /* { 3294 struct vnode *a_vp; 3295 off_t a_length; 3296 int a_flags; 3297 struct ucred *a_cred; 3298 struct proc *a_p; 3299 } */ *ap = v; 3300 #endif 3301 3302 /* Use nfs_setattr */ 3303 return (EOPNOTSUPP); 3304 } 3305 3306 /* 3307 * NFS update. 3308 */ 3309 int 3310 nfs_update(v) 3311 void *v; 3312 #if 0 3313 struct vop_update_args /* { 3314 struct vnode *a_vp; 3315 struct timespec *a_ta; 3316 struct timespec *a_tm; 3317 int a_waitfor; 3318 } */ *ap = v; 3319 #endif 3320 { 3321 3322 /* Use nfs_setattr */ 3323 return (EOPNOTSUPP); 3324 } 3325 3326 /* 3327 * Just call bwrite(). 3328 */ 3329 int 3330 nfs_bwrite(v) 3331 void *v; 3332 { 3333 struct vop_bwrite_args /* { 3334 struct vnode *a_bp; 3335 } */ *ap = v; 3336 3337 return (bwrite(ap->a_bp)); 3338 } 3339 3340 /* 3341 * nfs unlock wrapper. 3342 */ 3343 int 3344 nfs_unlock(void *v) 3345 { 3346 struct vop_unlock_args /* { 3347 struct vnode *a_vp; 3348 int a_flags; 3349 } */ *ap = v; 3350 struct vnode *vp = ap->a_vp; 3351 3352 /* 3353 * VOP_UNLOCK can be called by nfs_loadattrcache 3354 * with v_data == 0. 3355 */ 3356 if (VTONFS(vp)) { 3357 nfs_delayedtruncate(vp); 3358 } 3359 3360 return genfs_unlock(v); 3361 } 3362 3363 /* 3364 * nfs special file access vnode op. 3365 * Essentially just get vattr and then imitate iaccess() since the device is 3366 * local to the client. 3367 */ 3368 int 3369 nfsspec_access(v) 3370 void *v; 3371 { 3372 struct vop_access_args /* { 3373 struct vnode *a_vp; 3374 int a_mode; 3375 struct ucred *a_cred; 3376 struct proc *a_p; 3377 } */ *ap = v; 3378 struct vattr va; 3379 struct vnode *vp = ap->a_vp; 3380 int error; 3381 3382 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3383 if (error) 3384 return (error); 3385 3386 /* 3387 * Disallow write attempts on filesystems mounted read-only; 3388 * unless the file is a socket, fifo, or a block or character 3389 * device resident on the filesystem. 3390 */ 3391 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3392 switch (vp->v_type) { 3393 case VREG: 3394 case VDIR: 3395 case VLNK: 3396 return (EROFS); 3397 default: 3398 break; 3399 } 3400 } 3401 3402 return (vaccess(va.va_type, va.va_mode, 3403 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3404 } 3405 3406 /* 3407 * Read wrapper for special devices. 3408 */ 3409 int 3410 nfsspec_read(v) 3411 void *v; 3412 { 3413 struct vop_read_args /* { 3414 struct vnode *a_vp; 3415 struct uio *a_uio; 3416 int a_ioflag; 3417 struct ucred *a_cred; 3418 } */ *ap = v; 3419 struct nfsnode *np = VTONFS(ap->a_vp); 3420 3421 /* 3422 * Set access flag. 3423 */ 3424 np->n_flag |= NACC; 3425 np->n_atim.tv_sec = time.tv_sec; 3426 np->n_atim.tv_nsec = time.tv_usec * 1000; 3427 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3428 } 3429 3430 /* 3431 * Write wrapper for special devices. 3432 */ 3433 int 3434 nfsspec_write(v) 3435 void *v; 3436 { 3437 struct vop_write_args /* { 3438 struct vnode *a_vp; 3439 struct uio *a_uio; 3440 int a_ioflag; 3441 struct ucred *a_cred; 3442 } */ *ap = v; 3443 struct nfsnode *np = VTONFS(ap->a_vp); 3444 3445 /* 3446 * Set update flag. 3447 */ 3448 np->n_flag |= NUPD; 3449 np->n_mtim.tv_sec = time.tv_sec; 3450 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3451 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3452 } 3453 3454 /* 3455 * Close wrapper for special devices. 3456 * 3457 * Update the times on the nfsnode then do device close. 3458 */ 3459 int 3460 nfsspec_close(v) 3461 void *v; 3462 { 3463 struct vop_close_args /* { 3464 struct vnode *a_vp; 3465 int a_fflag; 3466 struct ucred *a_cred; 3467 struct proc *a_p; 3468 } */ *ap = v; 3469 struct vnode *vp = ap->a_vp; 3470 struct nfsnode *np = VTONFS(vp); 3471 struct vattr vattr; 3472 3473 if (np->n_flag & (NACC | NUPD)) { 3474 np->n_flag |= NCHG; 3475 if (vp->v_usecount == 1 && 3476 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3477 VATTR_NULL(&vattr); 3478 if (np->n_flag & NACC) 3479 vattr.va_atime = np->n_atim; 3480 if (np->n_flag & NUPD) 3481 vattr.va_mtime = np->n_mtim; 3482 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3483 } 3484 } 3485 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3486 } 3487 3488 /* 3489 * Read wrapper for fifos. 3490 */ 3491 int 3492 nfsfifo_read(v) 3493 void *v; 3494 { 3495 struct vop_read_args /* { 3496 struct vnode *a_vp; 3497 struct uio *a_uio; 3498 int a_ioflag; 3499 struct ucred *a_cred; 3500 } */ *ap = v; 3501 struct nfsnode *np = VTONFS(ap->a_vp); 3502 3503 /* 3504 * Set access flag. 3505 */ 3506 np->n_flag |= NACC; 3507 np->n_atim.tv_sec = time.tv_sec; 3508 np->n_atim.tv_nsec = time.tv_usec * 1000; 3509 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3510 } 3511 3512 /* 3513 * Write wrapper for fifos. 3514 */ 3515 int 3516 nfsfifo_write(v) 3517 void *v; 3518 { 3519 struct vop_write_args /* { 3520 struct vnode *a_vp; 3521 struct uio *a_uio; 3522 int a_ioflag; 3523 struct ucred *a_cred; 3524 } */ *ap = v; 3525 struct nfsnode *np = VTONFS(ap->a_vp); 3526 3527 /* 3528 * Set update flag. 3529 */ 3530 np->n_flag |= NUPD; 3531 np->n_mtim.tv_sec = time.tv_sec; 3532 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3533 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3534 } 3535 3536 /* 3537 * Close wrapper for fifos. 3538 * 3539 * Update the times on the nfsnode then do fifo close. 3540 */ 3541 int 3542 nfsfifo_close(v) 3543 void *v; 3544 { 3545 struct vop_close_args /* { 3546 struct vnode *a_vp; 3547 int a_fflag; 3548 struct ucred *a_cred; 3549 struct proc *a_p; 3550 } */ *ap = v; 3551 struct vnode *vp = ap->a_vp; 3552 struct nfsnode *np = VTONFS(vp); 3553 struct vattr vattr; 3554 3555 if (np->n_flag & (NACC | NUPD)) { 3556 if (np->n_flag & NACC) { 3557 np->n_atim.tv_sec = time.tv_sec; 3558 np->n_atim.tv_nsec = time.tv_usec * 1000; 3559 } 3560 if (np->n_flag & NUPD) { 3561 np->n_mtim.tv_sec = time.tv_sec; 3562 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3563 } 3564 np->n_flag |= NCHG; 3565 if (vp->v_usecount == 1 && 3566 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3567 VATTR_NULL(&vattr); 3568 if (np->n_flag & NACC) 3569 vattr.va_atime = np->n_atim; 3570 if (np->n_flag & NUPD) 3571 vattr.va_mtime = np->n_mtim; 3572 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3573 } 3574 } 3575 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3576 } 3577
Indexes created Wed Sep 24 02:09:48 GMT 2025