nfs_vnops.c revision 1.189
1 /* $NetBSD: nfs_vnops.c,v 1.189 2004/04/05 10:36:32 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 1.189 2004/04/05 10:36:32 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 return (0); 910 } 911 cache_purge1(newvp, NULL, PURGE_PARENTS); 912 if (newvp != dvp) 913 vput(newvp); 914 else 915 vrele(newvp); 916 *vpp = NULLVP; 917 } 918 dorpc: 919 error = 0; 920 newvp = NULLVP; 921 nfsstats.lookupcache_misses++; 922 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 923 len = cnp->cn_namelen; 924 nfsm_reqhead(np, NFSPROC_LOOKUP, 925 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 926 nfsm_fhtom(np, v3); 927 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 928 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 929 if (error) { 930 nfsm_postop_attr(dvp, attrflag, 0); 931 m_freem(mrep); 932 goto nfsmout; 933 } 934 nfsm_getfh(fhp, fhsize, v3); 935 936 /* 937 * Handle RENAME case... 938 */ 939 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 940 if (NFS_CMPFH(np, fhp, fhsize)) { 941 m_freem(mrep); 942 return (EISDIR); 943 } 944 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 945 if (error) { 946 m_freem(mrep); 947 return error; 948 } 949 newvp = NFSTOV(np); 950 if (v3) { 951 nfsm_postop_attr(newvp, attrflag, 0); 952 nfsm_postop_attr(dvp, attrflag, 0); 953 } else 954 nfsm_loadattr(newvp, (struct vattr *)0, 0); 955 *vpp = newvp; 956 m_freem(mrep); 957 cnp->cn_flags |= SAVENAME; 958 if (!lockparent) { 959 VOP_UNLOCK(dvp, 0); 960 cnp->cn_flags |= PDIRUNLOCK; 961 } 962 return (0); 963 } 964 965 /* 966 * The postop attr handling is duplicated for each if case, 967 * because it should be done while dvp is locked (unlocking 968 * dvp is different for each case). 969 */ 970 971 if (NFS_CMPFH(np, fhp, fhsize)) { 972 /* 973 * "." lookup 974 */ 975 VREF(dvp); 976 newvp = dvp; 977 if (v3) { 978 nfsm_postop_attr(newvp, attrflag, 0); 979 nfsm_postop_attr(dvp, attrflag, 0); 980 } else 981 nfsm_loadattr(newvp, (struct vattr *)0, 0); 982 } else if (flags & ISDOTDOT) { 983 /* 984 * ".." lookup 985 */ 986 VOP_UNLOCK(dvp, 0); 987 cnp->cn_flags |= PDIRUNLOCK; 988 989 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 990 if (error) { 991 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 992 cnp->cn_flags &= ~PDIRUNLOCK; 993 m_freem(mrep); 994 return error; 995 } 996 newvp = NFSTOV(np); 997 998 if (v3) { 999 nfsm_postop_attr(newvp, attrflag, 0); 1000 nfsm_postop_attr(dvp, attrflag, 0); 1001 } else 1002 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1003 1004 if (lockparent && (flags & ISLASTCN)) { 1005 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1006 m_freem(mrep); 1007 vput(newvp); 1008 return error; 1009 } 1010 cnp->cn_flags &= ~PDIRUNLOCK; 1011 } 1012 } else { 1013 /* 1014 * Other lookups. 1015 */ 1016 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1017 if (error) { 1018 m_freem(mrep); 1019 return error; 1020 } 1021 newvp = NFSTOV(np); 1022 if (v3) { 1023 nfsm_postop_attr(newvp, attrflag, 0); 1024 nfsm_postop_attr(dvp, attrflag, 0); 1025 } else 1026 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1027 if (!lockparent || !(flags & ISLASTCN)) { 1028 VOP_UNLOCK(dvp, 0); 1029 cnp->cn_flags |= PDIRUNLOCK; 1030 } 1031 } 1032 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1033 cnp->cn_flags |= SAVENAME; 1034 if ((cnp->cn_flags & MAKEENTRY) && 1035 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1036 nfs_cache_enter(dvp, newvp, cnp); 1037 } 1038 *vpp = newvp; 1039 nfsm_reqdone; 1040 if (error) { 1041 /* 1042 * We get here only because of errors returned by 1043 * the RPC. Otherwise we'll have returned above 1044 * (the nfsm_* macros will jump to nfsm_reqdone 1045 * on error). 1046 */ 1047 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1048 cnp->cn_nameiop != CREATE) { 1049 nfs_cache_enter(dvp, NULL, cnp); 1050 } 1051 if (newvp != NULLVP) { 1052 vrele(newvp); 1053 if (newvp != dvp) 1054 VOP_UNLOCK(newvp, 0); 1055 } 1056 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1057 (flags & ISLASTCN) && error == ENOENT) { 1058 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1059 error = EROFS; 1060 else 1061 error = EJUSTRETURN; 1062 } 1063 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1064 cnp->cn_flags |= SAVENAME; 1065 *vpp = NULL; 1066 } 1067 1068 return error; 1069 } 1070 1071 /* 1072 * nfs read call. 1073 * Just call nfs_bioread() to do the work. 1074 */ 1075 int 1076 nfs_read(v) 1077 void *v; 1078 { 1079 struct vop_read_args /* { 1080 struct vnode *a_vp; 1081 struct uio *a_uio; 1082 int a_ioflag; 1083 struct ucred *a_cred; 1084 } */ *ap = v; 1085 struct vnode *vp = ap->a_vp; 1086 1087 if (vp->v_type != VREG) 1088 return (EPERM); 1089 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1090 } 1091 1092 /* 1093 * nfs readlink call 1094 */ 1095 int 1096 nfs_readlink(v) 1097 void *v; 1098 { 1099 struct vop_readlink_args /* { 1100 struct vnode *a_vp; 1101 struct uio *a_uio; 1102 struct ucred *a_cred; 1103 } */ *ap = v; 1104 struct vnode *vp = ap->a_vp; 1105 1106 if (vp->v_type != VLNK) 1107 return (EPERM); 1108 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1109 } 1110 1111 /* 1112 * Do a readlink rpc. 1113 * Called by nfs_doio() from below the buffer cache. 1114 */ 1115 int 1116 nfs_readlinkrpc(vp, uiop, cred) 1117 struct vnode *vp; 1118 struct uio *uiop; 1119 struct ucred *cred; 1120 { 1121 u_int32_t *tl; 1122 caddr_t cp; 1123 int32_t t1, t2; 1124 caddr_t bpos, dpos, cp2; 1125 int error = 0, attrflag; 1126 uint32_t len; 1127 struct mbuf *mreq, *mrep, *md, *mb; 1128 const int v3 = NFS_ISV3(vp); 1129 struct nfsnode *np = VTONFS(vp); 1130 1131 nfsstats.rpccnt[NFSPROC_READLINK]++; 1132 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1133 nfsm_fhtom(np, v3); 1134 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1135 if (v3) 1136 nfsm_postop_attr(vp, attrflag, 0); 1137 if (!error) { 1138 if (v3) { 1139 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1140 len = fxdr_unsigned(uint32_t, *tl); 1141 if (len > MAXPATHLEN) { 1142 /* 1143 * this pathname is too long for us. 1144 */ 1145 m_freem(mrep); 1146 /* Solaris returns EINVAL. should we follow? */ 1147 error = ENAMETOOLONG; 1148 goto nfsmout; 1149 } 1150 } else { 1151 nfsm_strsiz(len, NFS_MAXPATHLEN); 1152 } 1153 nfsm_mtouio(uiop, len); 1154 } 1155 nfsm_reqdone; 1156 return (error); 1157 } 1158 1159 /* 1160 * nfs read rpc call 1161 * Ditto above 1162 */ 1163 int 1164 nfs_readrpc(vp, uiop) 1165 struct vnode *vp; 1166 struct uio *uiop; 1167 { 1168 u_int32_t *tl; 1169 caddr_t cp; 1170 int32_t t1, t2; 1171 caddr_t bpos, dpos, cp2; 1172 struct mbuf *mreq, *mrep, *md, *mb; 1173 struct nfsmount *nmp; 1174 int error = 0, len, retlen, tsiz, eof, attrflag; 1175 const int v3 = NFS_ISV3(vp); 1176 struct nfsnode *np = VTONFS(vp); 1177 1178 #ifndef nolint 1179 eof = 0; 1180 #endif 1181 nmp = VFSTONFS(vp->v_mount); 1182 tsiz = uiop->uio_resid; 1183 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1184 return (EFBIG); 1185 while (tsiz > 0) { 1186 nfsstats.rpccnt[NFSPROC_READ]++; 1187 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1188 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1189 nfsm_fhtom(np, v3); 1190 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1191 if (v3) { 1192 txdr_hyper(uiop->uio_offset, tl); 1193 *(tl + 2) = txdr_unsigned(len); 1194 } else { 1195 *tl++ = txdr_unsigned(uiop->uio_offset); 1196 *tl++ = txdr_unsigned(len); 1197 *tl = 0; 1198 } 1199 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, np->n_rcred); 1200 if (v3) { 1201 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1202 if (error) { 1203 m_freem(mrep); 1204 goto nfsmout; 1205 } 1206 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1207 eof = fxdr_unsigned(int, *(tl + 1)); 1208 } else 1209 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1210 nfsm_strsiz(retlen, nmp->nm_rsize); 1211 nfsm_mtouio(uiop, retlen); 1212 m_freem(mrep); 1213 tsiz -= retlen; 1214 if (v3) { 1215 if (eof || retlen == 0) 1216 tsiz = 0; 1217 } else if (retlen < len) 1218 tsiz = 0; 1219 } 1220 nfsmout: 1221 return (error); 1222 } 1223 1224 struct nfs_writerpc_context { 1225 struct simplelock nwc_slock; 1226 volatile int nwc_mbufcount; 1227 }; 1228 1229 /* 1230 * free mbuf used to refer protected pages while write rpc call. 1231 * called at splvm. 1232 */ 1233 static void 1234 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1235 { 1236 struct nfs_writerpc_context *ctx = arg; 1237 1238 KASSERT(m != NULL); 1239 KASSERT(ctx != NULL); 1240 pool_cache_put(&mbpool_cache, m); 1241 simple_lock(&ctx->nwc_slock); 1242 if (--ctx->nwc_mbufcount == 0) { 1243 wakeup(ctx); 1244 } 1245 simple_unlock(&ctx->nwc_slock); 1246 } 1247 1248 /* 1249 * nfs write call 1250 */ 1251 int 1252 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1253 struct vnode *vp; 1254 struct uio *uiop; 1255 int *iomode; 1256 boolean_t pageprotected; 1257 boolean_t *stalewriteverfp; 1258 { 1259 u_int32_t *tl; 1260 caddr_t cp; 1261 int32_t t1, t2; 1262 caddr_t bpos, dpos, cp2; 1263 struct mbuf *mreq, *mrep, *md, *mb; 1264 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1265 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1266 const int v3 = NFS_ISV3(vp); 1267 int committed = NFSV3WRITE_FILESYNC; 1268 struct nfsnode *np = VTONFS(vp); 1269 struct nfs_writerpc_context ctx; 1270 int s; 1271 struct lwp *l = NULL; 1272 size_t origresid; 1273 1274 simple_lock_init(&ctx.nwc_slock); 1275 ctx.nwc_mbufcount = 1; 1276 1277 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1278 panic("writerpc readonly vp %p", vp); 1279 } 1280 1281 #ifdef DIAGNOSTIC 1282 if (uiop->uio_iovcnt != 1) 1283 panic("nfs: writerpc iovcnt > 1"); 1284 #endif 1285 tsiz = uiop->uio_resid; 1286 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1287 return (EFBIG); 1288 if (pageprotected) { 1289 l = curlwp; 1290 PHOLD(l); 1291 } 1292 retry: 1293 origresid = uiop->uio_resid; 1294 KASSERT(origresid == uiop->uio_iov->iov_len); 1295 while (tsiz > 0) { 1296 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1297 uint32_t backup; 1298 boolean_t stalewriteverf = FALSE; 1299 1300 nfsstats.rpccnt[NFSPROC_WRITE]++; 1301 len = min(tsiz, nmp->nm_wsize); 1302 datalen = pageprotected ? 0 : nfsm_rndup(len); 1303 nfsm_reqhead(np, NFSPROC_WRITE, 1304 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1305 nfsm_fhtom(np, v3); 1306 if (v3) { 1307 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1308 txdr_hyper(uiop->uio_offset, tl); 1309 tl += 2; 1310 *tl++ = txdr_unsigned(len); 1311 *tl++ = txdr_unsigned(*iomode); 1312 *tl = txdr_unsigned(len); 1313 } else { 1314 u_int32_t x; 1315 1316 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1317 /* Set both "begin" and "current" to non-garbage. */ 1318 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1319 *tl++ = x; /* "begin offset" */ 1320 *tl++ = x; /* "current offset" */ 1321 x = txdr_unsigned(len); 1322 *tl++ = x; /* total to this offset */ 1323 *tl = x; /* size of this write */ 1324 1325 } 1326 if (pageprotected) { 1327 /* 1328 * since we know pages can't be modified during i/o, 1329 * no need to copy them for us. 1330 */ 1331 struct mbuf *m; 1332 struct iovec *iovp = uiop->uio_iov; 1333 1334 m = m_get(M_WAIT, MT_DATA); 1335 MCLAIM(m, &nfs_mowner); 1336 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1337 nfs_writerpc_extfree, &ctx); 1338 m->m_flags |= M_EXT_ROMAP; 1339 m->m_len = len; 1340 mb->m_next = m; 1341 /* 1342 * no need to maintain mb and bpos here 1343 * because no one care them later. 1344 */ 1345 #if 0 1346 mb = m; 1347 bpos = mtod(caddr_t, mb) + mb->m_len; 1348 #endif 1349 iovp->iov_base = (char *)iovp->iov_base + len; 1350 iovp->iov_len -= len; 1351 uiop->uio_offset += len; 1352 uiop->uio_resid -= len; 1353 s = splvm(); 1354 simple_lock(&ctx.nwc_slock); 1355 ctx.nwc_mbufcount++; 1356 simple_unlock(&ctx.nwc_slock); 1357 splx(s); 1358 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1359 } else { 1360 nfsm_uiotom(uiop, len); 1361 } 1362 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, np->n_wcred); 1363 if (v3) { 1364 wccflag = NFSV3_WCCCHK; 1365 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1366 if (!error) { 1367 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1368 + NFSX_V3WRITEVERF); 1369 rlen = fxdr_unsigned(int, *tl++); 1370 if (rlen == 0) { 1371 error = NFSERR_IO; 1372 m_freem(mrep); 1373 break; 1374 } else if (rlen < len) { 1375 backup = len - rlen; 1376 uiop->uio_iov->iov_base = 1377 (caddr_t)uiop->uio_iov->iov_base - 1378 backup; 1379 uiop->uio_iov->iov_len += backup; 1380 uiop->uio_offset -= backup; 1381 uiop->uio_resid += backup; 1382 len = rlen; 1383 } 1384 commit = fxdr_unsigned(int, *tl++); 1385 1386 /* 1387 * Return the lowest committment level 1388 * obtained by any of the RPCs. 1389 */ 1390 if (committed == NFSV3WRITE_FILESYNC) 1391 committed = commit; 1392 else if (committed == NFSV3WRITE_DATASYNC && 1393 commit == NFSV3WRITE_UNSTABLE) 1394 committed = commit; 1395 simple_lock(&nmp->nm_slock); 1396 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1397 memcpy(nmp->nm_writeverf, tl, 1398 NFSX_V3WRITEVERF); 1399 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1400 } else if ((nmp->nm_iflag & 1401 NFSMNT_STALEWRITEVERF) || 1402 memcmp(tl, nmp->nm_writeverf, 1403 NFSX_V3WRITEVERF)) { 1404 memcpy(nmp->nm_writeverf, tl, 1405 NFSX_V3WRITEVERF); 1406 /* 1407 * note NFSMNT_STALEWRITEVERF 1408 * if we're the first thread to 1409 * notice it. 1410 */ 1411 if ((nmp->nm_iflag & 1412 NFSMNT_STALEWRITEVERF) == 0) { 1413 stalewriteverf = TRUE; 1414 nmp->nm_iflag |= 1415 NFSMNT_STALEWRITEVERF; 1416 } 1417 } 1418 simple_unlock(&nmp->nm_slock); 1419 } 1420 } else 1421 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1422 if (wccflag) 1423 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1424 m_freem(mrep); 1425 if (error) 1426 break; 1427 tsiz -= len; 1428 if (stalewriteverf) { 1429 *stalewriteverfp = TRUE; 1430 stalewriteverf = FALSE; 1431 if (committed == NFSV3WRITE_UNSTABLE && 1432 len != origresid) { 1433 /* 1434 * if our write requests weren't atomic but 1435 * unstable, datas in previous iterations 1436 * might have already been lost now. 1437 * then, we should resend them to nfsd. 1438 */ 1439 backup = origresid - tsiz; 1440 uiop->uio_iov->iov_base = 1441 (caddr_t)uiop->uio_iov->iov_base - backup; 1442 uiop->uio_iov->iov_len += backup; 1443 uiop->uio_offset -= backup; 1444 uiop->uio_resid += backup; 1445 tsiz = origresid; 1446 goto retry; 1447 } 1448 } 1449 } 1450 if (pageprotected) { 1451 /* 1452 * wait until mbufs go away. 1453 * retransmitted mbufs can survive longer than rpc requests 1454 * themselves. 1455 */ 1456 s = splvm(); 1457 simple_lock(&ctx.nwc_slock); 1458 ctx.nwc_mbufcount--; 1459 while (ctx.nwc_mbufcount > 0) { 1460 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1461 } 1462 simple_unlock(&ctx.nwc_slock); 1463 splx(s); 1464 PRELE(l); 1465 } 1466 nfsmout: 1467 *iomode = committed; 1468 if (error) 1469 uiop->uio_resid = tsiz; 1470 return (error); 1471 } 1472 1473 /* 1474 * nfs mknod rpc 1475 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1476 * mode set to specify the file type and the size field for rdev. 1477 */ 1478 int 1479 nfs_mknodrpc(dvp, vpp, cnp, vap) 1480 struct vnode *dvp; 1481 struct vnode **vpp; 1482 struct componentname *cnp; 1483 struct vattr *vap; 1484 { 1485 struct nfsv2_sattr *sp; 1486 u_int32_t *tl; 1487 caddr_t cp; 1488 int32_t t1, t2; 1489 struct vnode *newvp = (struct vnode *)0; 1490 struct nfsnode *dnp, *np; 1491 char *cp2; 1492 caddr_t bpos, dpos; 1493 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1494 struct mbuf *mreq, *mrep, *md, *mb; 1495 u_int32_t rdev; 1496 const int v3 = NFS_ISV3(dvp); 1497 1498 if (vap->va_type == VCHR || vap->va_type == VBLK) 1499 rdev = txdr_unsigned(vap->va_rdev); 1500 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1501 rdev = nfs_xdrneg1; 1502 else { 1503 VOP_ABORTOP(dvp, cnp); 1504 vput(dvp); 1505 return (EOPNOTSUPP); 1506 } 1507 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1508 dnp = VTONFS(dvp); 1509 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1510 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1511 nfsm_fhtom(dnp, v3); 1512 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1513 if (v3) { 1514 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1515 *tl++ = vtonfsv3_type(vap->va_type); 1516 nfsm_v3attrbuild(vap, FALSE); 1517 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1518 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1519 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1520 *tl = txdr_unsigned(minor(vap->va_rdev)); 1521 } 1522 } else { 1523 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1524 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1525 sp->sa_uid = nfs_xdrneg1; 1526 sp->sa_gid = nfs_xdrneg1; 1527 sp->sa_size = rdev; 1528 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1529 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1530 } 1531 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1532 if (!error) { 1533 nfsm_mtofh(dvp, newvp, v3, gotvp); 1534 if (!gotvp) { 1535 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1536 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1537 if (!error) 1538 newvp = NFSTOV(np); 1539 } 1540 } 1541 if (v3) 1542 nfsm_wcc_data(dvp, wccflag, 0); 1543 nfsm_reqdone; 1544 if (error) { 1545 if (newvp) 1546 vput(newvp); 1547 } else { 1548 if (cnp->cn_flags & MAKEENTRY) 1549 nfs_cache_enter(dvp, newvp, cnp); 1550 *vpp = newvp; 1551 } 1552 PNBUF_PUT(cnp->cn_pnbuf); 1553 VTONFS(dvp)->n_flag |= NMODIFIED; 1554 if (!wccflag) 1555 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1556 vput(dvp); 1557 return (error); 1558 } 1559 1560 /* 1561 * nfs mknod vop 1562 * just call nfs_mknodrpc() to do the work. 1563 */ 1564 /* ARGSUSED */ 1565 int 1566 nfs_mknod(v) 1567 void *v; 1568 { 1569 struct vop_mknod_args /* { 1570 struct vnode *a_dvp; 1571 struct vnode **a_vpp; 1572 struct componentname *a_cnp; 1573 struct vattr *a_vap; 1574 } */ *ap = v; 1575 int error; 1576 1577 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1578 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1579 return (error); 1580 } 1581 1582 static u_long create_verf; 1583 /* 1584 * nfs file create call 1585 */ 1586 int 1587 nfs_create(v) 1588 void *v; 1589 { 1590 struct vop_create_args /* { 1591 struct vnode *a_dvp; 1592 struct vnode **a_vpp; 1593 struct componentname *a_cnp; 1594 struct vattr *a_vap; 1595 } */ *ap = v; 1596 struct vnode *dvp = ap->a_dvp; 1597 struct vattr *vap = ap->a_vap; 1598 struct componentname *cnp = ap->a_cnp; 1599 struct nfsv2_sattr *sp; 1600 u_int32_t *tl; 1601 caddr_t cp; 1602 int32_t t1, t2; 1603 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1604 struct vnode *newvp = (struct vnode *)0; 1605 caddr_t bpos, dpos, cp2; 1606 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1607 struct mbuf *mreq, *mrep, *md, *mb; 1608 const int v3 = NFS_ISV3(dvp); 1609 1610 /* 1611 * Oops, not for me.. 1612 */ 1613 if (vap->va_type == VSOCK) 1614 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1615 1616 #ifdef VA_EXCLUSIVE 1617 if (vap->va_vaflags & VA_EXCLUSIVE) 1618 fmode |= O_EXCL; 1619 #endif 1620 again: 1621 error = 0; 1622 nfsstats.rpccnt[NFSPROC_CREATE]++; 1623 dnp = VTONFS(dvp); 1624 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1625 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1626 nfsm_fhtom(dnp, v3); 1627 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1628 if (v3) { 1629 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1630 if (fmode & O_EXCL) { 1631 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1632 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1633 #ifdef INET 1634 if (TAILQ_FIRST(&in_ifaddr)) 1635 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1636 else 1637 *tl++ = create_verf; 1638 #else 1639 *tl++ = create_verf; 1640 #endif 1641 *tl = ++create_verf; 1642 } else { 1643 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1644 nfsm_v3attrbuild(vap, FALSE); 1645 } 1646 } else { 1647 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1648 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1649 sp->sa_uid = nfs_xdrneg1; 1650 sp->sa_gid = nfs_xdrneg1; 1651 sp->sa_size = 0; 1652 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1653 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1654 } 1655 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1656 if (!error) { 1657 nfsm_mtofh(dvp, newvp, v3, gotvp); 1658 if (!gotvp) { 1659 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1660 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1661 if (!error) 1662 newvp = NFSTOV(np); 1663 } 1664 } 1665 if (v3) 1666 nfsm_wcc_data(dvp, wccflag, 0); 1667 nfsm_reqdone; 1668 if (error) { 1669 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1670 fmode &= ~O_EXCL; 1671 goto again; 1672 } 1673 if (newvp) 1674 vput(newvp); 1675 } else if (v3 && (fmode & O_EXCL)) 1676 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1677 if (!error) { 1678 if (cnp->cn_flags & MAKEENTRY) 1679 nfs_cache_enter(dvp, newvp, cnp); 1680 *ap->a_vpp = newvp; 1681 } 1682 PNBUF_PUT(cnp->cn_pnbuf); 1683 VTONFS(dvp)->n_flag |= NMODIFIED; 1684 if (!wccflag) 1685 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1686 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1687 vput(dvp); 1688 return (error); 1689 } 1690 1691 /* 1692 * nfs file remove call 1693 * To try and make nfs semantics closer to ufs semantics, a file that has 1694 * other processes using the vnode is renamed instead of removed and then 1695 * removed later on the last close. 1696 * - If v_usecount > 1 1697 * If a rename is not already in the works 1698 * call nfs_sillyrename() to set it up 1699 * else 1700 * do the remove rpc 1701 */ 1702 int 1703 nfs_remove(v) 1704 void *v; 1705 { 1706 struct vop_remove_args /* { 1707 struct vnodeop_desc *a_desc; 1708 struct vnode * a_dvp; 1709 struct vnode * a_vp; 1710 struct componentname * a_cnp; 1711 } */ *ap = v; 1712 struct vnode *vp = ap->a_vp; 1713 struct vnode *dvp = ap->a_dvp; 1714 struct componentname *cnp = ap->a_cnp; 1715 struct nfsnode *np = VTONFS(vp); 1716 int error = 0; 1717 struct vattr vattr; 1718 1719 #ifndef DIAGNOSTIC 1720 if ((cnp->cn_flags & HASBUF) == 0) 1721 panic("nfs_remove: no name"); 1722 if (vp->v_usecount < 1) 1723 panic("nfs_remove: bad v_usecount"); 1724 #endif 1725 if (vp->v_type == VDIR) 1726 error = EPERM; 1727 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1728 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1729 vattr.va_nlink > 1)) { 1730 /* 1731 * Purge the name cache so that the chance of a lookup for 1732 * the name succeeding while the remove is in progress is 1733 * minimized. Without node locking it can still happen, such 1734 * that an I/O op returns ESTALE, but since you get this if 1735 * another host removes the file.. 1736 */ 1737 cache_purge(vp); 1738 /* 1739 * throw away biocache buffers, mainly to avoid 1740 * unnecessary delayed writes later. 1741 */ 1742 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1743 /* Do the rpc */ 1744 if (error != EINTR) 1745 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1746 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1747 /* 1748 * Kludge City: If the first reply to the remove rpc is lost.. 1749 * the reply to the retransmitted request will be ENOENT 1750 * since the file was in fact removed 1751 * Therefore, we cheat and return success. 1752 */ 1753 if (error == ENOENT) 1754 error = 0; 1755 } else if (!np->n_sillyrename) 1756 error = nfs_sillyrename(dvp, vp, cnp); 1757 PNBUF_PUT(cnp->cn_pnbuf); 1758 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1759 vattr.va_nlink == 1) { 1760 np->n_flag |= NREMOVED; 1761 } 1762 NFS_INVALIDATE_ATTRCACHE(np); 1763 VN_KNOTE(vp, NOTE_DELETE); 1764 VN_KNOTE(dvp, NOTE_WRITE); 1765 if (dvp == vp) 1766 vrele(vp); 1767 else 1768 vput(vp); 1769 vput(dvp); 1770 return (error); 1771 } 1772 1773 /* 1774 * nfs file remove rpc called from nfs_inactive 1775 */ 1776 int 1777 nfs_removeit(sp) 1778 struct sillyrename *sp; 1779 { 1780 1781 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1782 (struct proc *)0)); 1783 } 1784 1785 /* 1786 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1787 */ 1788 int 1789 nfs_removerpc(dvp, name, namelen, cred, proc) 1790 struct vnode *dvp; 1791 const char *name; 1792 int namelen; 1793 struct ucred *cred; 1794 struct proc *proc; 1795 { 1796 u_int32_t *tl; 1797 caddr_t cp; 1798 int32_t t1, t2; 1799 caddr_t bpos, dpos, cp2; 1800 int error = 0, wccflag = NFSV3_WCCRATTR; 1801 struct mbuf *mreq, *mrep, *md, *mb; 1802 const int v3 = NFS_ISV3(dvp); 1803 struct nfsnode *dnp = VTONFS(dvp); 1804 1805 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1806 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1807 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1808 nfsm_fhtom(dnp, v3); 1809 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1810 nfsm_request(dnp, NFSPROC_REMOVE, proc, cred); 1811 if (v3) 1812 nfsm_wcc_data(dvp, wccflag, 0); 1813 nfsm_reqdone; 1814 VTONFS(dvp)->n_flag |= NMODIFIED; 1815 if (!wccflag) 1816 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1817 return (error); 1818 } 1819 1820 /* 1821 * nfs file rename call 1822 */ 1823 int 1824 nfs_rename(v) 1825 void *v; 1826 { 1827 struct vop_rename_args /* { 1828 struct vnode *a_fdvp; 1829 struct vnode *a_fvp; 1830 struct componentname *a_fcnp; 1831 struct vnode *a_tdvp; 1832 struct vnode *a_tvp; 1833 struct componentname *a_tcnp; 1834 } */ *ap = v; 1835 struct vnode *fvp = ap->a_fvp; 1836 struct vnode *tvp = ap->a_tvp; 1837 struct vnode *fdvp = ap->a_fdvp; 1838 struct vnode *tdvp = ap->a_tdvp; 1839 struct componentname *tcnp = ap->a_tcnp; 1840 struct componentname *fcnp = ap->a_fcnp; 1841 int error; 1842 1843 #ifndef DIAGNOSTIC 1844 if ((tcnp->cn_flags & HASBUF) == 0 || 1845 (fcnp->cn_flags & HASBUF) == 0) 1846 panic("nfs_rename: no name"); 1847 #endif 1848 /* Check for cross-device rename */ 1849 if ((fvp->v_mount != tdvp->v_mount) || 1850 (tvp && (fvp->v_mount != tvp->v_mount))) { 1851 error = EXDEV; 1852 goto out; 1853 } 1854 1855 /* 1856 * If the tvp exists and is in use, sillyrename it before doing the 1857 * rename of the new file over it. 1858 */ 1859 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1860 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1861 VN_KNOTE(tvp, NOTE_DELETE); 1862 vput(tvp); 1863 tvp = NULL; 1864 } 1865 1866 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1867 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1868 tcnp->cn_proc); 1869 1870 VN_KNOTE(fdvp, NOTE_WRITE); 1871 VN_KNOTE(tdvp, NOTE_WRITE); 1872 if (fvp->v_type == VDIR) { 1873 if (tvp != NULL && tvp->v_type == VDIR) 1874 cache_purge(tdvp); 1875 cache_purge(fdvp); 1876 } 1877 out: 1878 if (tdvp == tvp) 1879 vrele(tdvp); 1880 else 1881 vput(tdvp); 1882 if (tvp) 1883 vput(tvp); 1884 vrele(fdvp); 1885 vrele(fvp); 1886 /* 1887 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1888 */ 1889 if (error == ENOENT) 1890 error = 0; 1891 return (error); 1892 } 1893 1894 /* 1895 * nfs file rename rpc called from nfs_remove() above 1896 */ 1897 int 1898 nfs_renameit(sdvp, scnp, sp) 1899 struct vnode *sdvp; 1900 struct componentname *scnp; 1901 struct sillyrename *sp; 1902 { 1903 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1904 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1905 } 1906 1907 /* 1908 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1909 */ 1910 int 1911 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1912 struct vnode *fdvp; 1913 const char *fnameptr; 1914 int fnamelen; 1915 struct vnode *tdvp; 1916 const char *tnameptr; 1917 int tnamelen; 1918 struct ucred *cred; 1919 struct proc *proc; 1920 { 1921 u_int32_t *tl; 1922 caddr_t cp; 1923 int32_t t1, t2; 1924 caddr_t bpos, dpos, cp2; 1925 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1926 struct mbuf *mreq, *mrep, *md, *mb; 1927 const int v3 = NFS_ISV3(fdvp); 1928 struct nfsnode *fdnp = VTONFS(fdvp); 1929 1930 nfsstats.rpccnt[NFSPROC_RENAME]++; 1931 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1932 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1933 nfsm_rndup(tnamelen)); 1934 nfsm_fhtom(fdnp, v3); 1935 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1936 nfsm_fhtom(VTONFS(tdvp), v3); 1937 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1938 nfsm_request(fdnp, NFSPROC_RENAME, proc, cred); 1939 if (v3) { 1940 nfsm_wcc_data(fdvp, fwccflag, 0); 1941 nfsm_wcc_data(tdvp, twccflag, 0); 1942 } 1943 nfsm_reqdone; 1944 VTONFS(fdvp)->n_flag |= NMODIFIED; 1945 VTONFS(tdvp)->n_flag |= NMODIFIED; 1946 if (!fwccflag) 1947 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 1948 if (!twccflag) 1949 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 1950 return (error); 1951 } 1952 1953 /* 1954 * nfs hard link create call 1955 */ 1956 int 1957 nfs_link(v) 1958 void *v; 1959 { 1960 struct vop_link_args /* { 1961 struct vnode *a_dvp; 1962 struct vnode *a_vp; 1963 struct componentname *a_cnp; 1964 } */ *ap = v; 1965 struct vnode *vp = ap->a_vp; 1966 struct vnode *dvp = ap->a_dvp; 1967 struct componentname *cnp = ap->a_cnp; 1968 u_int32_t *tl; 1969 caddr_t cp; 1970 int32_t t1, t2; 1971 caddr_t bpos, dpos, cp2; 1972 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1973 struct mbuf *mreq, *mrep, *md, *mb; 1974 /* XXX Should be const and initialised? */ 1975 int v3; 1976 struct nfsnode *np; 1977 1978 if (dvp->v_mount != vp->v_mount) { 1979 VOP_ABORTOP(dvp, cnp); 1980 vput(dvp); 1981 return (EXDEV); 1982 } 1983 if (dvp != vp) { 1984 error = vn_lock(vp, LK_EXCLUSIVE); 1985 if (error != 0) { 1986 VOP_ABORTOP(dvp, cnp); 1987 vput(dvp); 1988 return error; 1989 } 1990 } 1991 1992 /* 1993 * Push all writes to the server, so that the attribute cache 1994 * doesn't get "out of sync" with the server. 1995 * XXX There should be a better way! 1996 */ 1997 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1998 1999 v3 = NFS_ISV3(vp); 2000 nfsstats.rpccnt[NFSPROC_LINK]++; 2001 np = VTONFS(vp); 2002 nfsm_reqhead(np, NFSPROC_LINK, 2003 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2004 nfsm_fhtom(np, v3); 2005 nfsm_fhtom(VTONFS(dvp), v3); 2006 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2007 nfsm_request(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 2008 if (v3) { 2009 nfsm_postop_attr(vp, attrflag, 0); 2010 nfsm_wcc_data(dvp, wccflag, 0); 2011 } 2012 nfsm_reqdone; 2013 PNBUF_PUT(cnp->cn_pnbuf); 2014 VTONFS(dvp)->n_flag |= NMODIFIED; 2015 if (!attrflag) 2016 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2017 if (!wccflag) 2018 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2019 if (dvp != vp) 2020 VOP_UNLOCK(vp, 0); 2021 VN_KNOTE(vp, NOTE_LINK); 2022 VN_KNOTE(dvp, NOTE_WRITE); 2023 vput(dvp); 2024 /* 2025 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2026 */ 2027 if (error == EEXIST) 2028 error = 0; 2029 return (error); 2030 } 2031 2032 /* 2033 * nfs symbolic link create call 2034 */ 2035 int 2036 nfs_symlink(v) 2037 void *v; 2038 { 2039 struct vop_symlink_args /* { 2040 struct vnode *a_dvp; 2041 struct vnode **a_vpp; 2042 struct componentname *a_cnp; 2043 struct vattr *a_vap; 2044 char *a_target; 2045 } */ *ap = v; 2046 struct vnode *dvp = ap->a_dvp; 2047 struct vattr *vap = ap->a_vap; 2048 struct componentname *cnp = ap->a_cnp; 2049 struct nfsv2_sattr *sp; 2050 u_int32_t *tl; 2051 caddr_t cp; 2052 int32_t t1, t2; 2053 caddr_t bpos, dpos, cp2; 2054 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2055 struct mbuf *mreq, *mrep, *md, *mb; 2056 struct vnode *newvp = (struct vnode *)0; 2057 const int v3 = NFS_ISV3(dvp); 2058 struct nfsnode *dnp = VTONFS(dvp); 2059 2060 *ap->a_vpp = NULL; 2061 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2062 slen = strlen(ap->a_target); 2063 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2064 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2065 nfsm_fhtom(dnp, v3); 2066 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2067 if (v3) 2068 nfsm_v3attrbuild(vap, FALSE); 2069 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2070 if (!v3) { 2071 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2072 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2073 sp->sa_uid = nfs_xdrneg1; 2074 sp->sa_gid = nfs_xdrneg1; 2075 sp->sa_size = nfs_xdrneg1; 2076 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2077 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2078 } 2079 nfsm_request(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 2080 if (v3) { 2081 if (!error) 2082 nfsm_mtofh(dvp, newvp, v3, gotvp); 2083 nfsm_wcc_data(dvp, wccflag, 0); 2084 } 2085 nfsm_reqdone; 2086 /* 2087 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2088 */ 2089 if (error == EEXIST) 2090 error = 0; 2091 if (error == 0 && newvp == NULL) { 2092 struct nfsnode *np = NULL; 2093 2094 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2095 cnp->cn_cred, cnp->cn_proc, &np); 2096 if (error == 0) 2097 newvp = NFSTOV(np); 2098 } 2099 if (error) { 2100 if (newvp != NULL) 2101 vput(newvp); 2102 } else { 2103 *ap->a_vpp = newvp; 2104 } 2105 PNBUF_PUT(cnp->cn_pnbuf); 2106 VTONFS(dvp)->n_flag |= NMODIFIED; 2107 if (!wccflag) 2108 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2109 VN_KNOTE(dvp, NOTE_WRITE); 2110 vput(dvp); 2111 return (error); 2112 } 2113 2114 /* 2115 * nfs make dir call 2116 */ 2117 int 2118 nfs_mkdir(v) 2119 void *v; 2120 { 2121 struct vop_mkdir_args /* { 2122 struct vnode *a_dvp; 2123 struct vnode **a_vpp; 2124 struct componentname *a_cnp; 2125 struct vattr *a_vap; 2126 } */ *ap = v; 2127 struct vnode *dvp = ap->a_dvp; 2128 struct vattr *vap = ap->a_vap; 2129 struct componentname *cnp = ap->a_cnp; 2130 struct nfsv2_sattr *sp; 2131 u_int32_t *tl; 2132 caddr_t cp; 2133 int32_t t1, t2; 2134 int len; 2135 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2136 struct vnode *newvp = (struct vnode *)0; 2137 caddr_t bpos, dpos, cp2; 2138 int error = 0, wccflag = NFSV3_WCCRATTR; 2139 int gotvp = 0; 2140 struct mbuf *mreq, *mrep, *md, *mb; 2141 const int v3 = NFS_ISV3(dvp); 2142 2143 len = cnp->cn_namelen; 2144 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2145 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2146 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2147 nfsm_fhtom(dnp, v3); 2148 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2149 if (v3) { 2150 nfsm_v3attrbuild(vap, FALSE); 2151 } else { 2152 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2153 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2154 sp->sa_uid = nfs_xdrneg1; 2155 sp->sa_gid = nfs_xdrneg1; 2156 sp->sa_size = nfs_xdrneg1; 2157 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2158 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2159 } 2160 nfsm_request(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 2161 if (!error) 2162 nfsm_mtofh(dvp, newvp, v3, gotvp); 2163 if (v3) 2164 nfsm_wcc_data(dvp, wccflag, 0); 2165 nfsm_reqdone; 2166 VTONFS(dvp)->n_flag |= NMODIFIED; 2167 if (!wccflag) 2168 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2169 /* 2170 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2171 * if we can succeed in looking up the directory. 2172 */ 2173 if (error == EEXIST || (!error && !gotvp)) { 2174 if (newvp) { 2175 vput(newvp); 2176 newvp = (struct vnode *)0; 2177 } 2178 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2179 cnp->cn_proc, &np); 2180 if (!error) { 2181 newvp = NFSTOV(np); 2182 if (newvp->v_type != VDIR) 2183 error = EEXIST; 2184 } 2185 } 2186 if (error) { 2187 if (newvp) 2188 vput(newvp); 2189 } else { 2190 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2191 if (cnp->cn_flags & MAKEENTRY) 2192 nfs_cache_enter(dvp, newvp, cnp); 2193 *ap->a_vpp = newvp; 2194 } 2195 PNBUF_PUT(cnp->cn_pnbuf); 2196 vput(dvp); 2197 return (error); 2198 } 2199 2200 /* 2201 * nfs remove directory call 2202 */ 2203 int 2204 nfs_rmdir(v) 2205 void *v; 2206 { 2207 struct vop_rmdir_args /* { 2208 struct vnode *a_dvp; 2209 struct vnode *a_vp; 2210 struct componentname *a_cnp; 2211 } */ *ap = v; 2212 struct vnode *vp = ap->a_vp; 2213 struct vnode *dvp = ap->a_dvp; 2214 struct componentname *cnp = ap->a_cnp; 2215 u_int32_t *tl; 2216 caddr_t cp; 2217 int32_t t1, t2; 2218 caddr_t bpos, dpos, cp2; 2219 int error = 0, wccflag = NFSV3_WCCRATTR; 2220 struct mbuf *mreq, *mrep, *md, *mb; 2221 const int v3 = NFS_ISV3(dvp); 2222 struct nfsnode *dnp; 2223 2224 if (dvp == vp) { 2225 vrele(dvp); 2226 vput(dvp); 2227 PNBUF_PUT(cnp->cn_pnbuf); 2228 return (EINVAL); 2229 } 2230 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2231 dnp = VTONFS(dvp); 2232 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2233 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2234 nfsm_fhtom(dnp, v3); 2235 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2236 nfsm_request(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2237 if (v3) 2238 nfsm_wcc_data(dvp, wccflag, 0); 2239 nfsm_reqdone; 2240 PNBUF_PUT(cnp->cn_pnbuf); 2241 VTONFS(dvp)->n_flag |= NMODIFIED; 2242 if (!wccflag) 2243 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2244 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2245 VN_KNOTE(vp, NOTE_DELETE); 2246 cache_purge(vp); 2247 vput(vp); 2248 vput(dvp); 2249 /* 2250 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2251 */ 2252 if (error == ENOENT) 2253 error = 0; 2254 return (error); 2255 } 2256 2257 /* 2258 * nfs readdir call 2259 */ 2260 int 2261 nfs_readdir(v) 2262 void *v; 2263 { 2264 struct vop_readdir_args /* { 2265 struct vnode *a_vp; 2266 struct uio *a_uio; 2267 struct ucred *a_cred; 2268 int *a_eofflag; 2269 off_t **a_cookies; 2270 int *a_ncookies; 2271 } */ *ap = v; 2272 struct vnode *vp = ap->a_vp; 2273 struct uio *uio = ap->a_uio; 2274 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2275 char *base = uio->uio_iov->iov_base; 2276 int tresid, error; 2277 size_t count, lost; 2278 struct dirent *dp; 2279 off_t *cookies = NULL; 2280 int ncookies = 0, nc; 2281 2282 if (vp->v_type != VDIR) 2283 return (EPERM); 2284 2285 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2286 count = uio->uio_resid - lost; 2287 if (count <= 0) 2288 return (EINVAL); 2289 2290 /* 2291 * Call nfs_bioread() to do the real work. 2292 */ 2293 tresid = uio->uio_resid = count; 2294 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2295 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2296 2297 if (!error && ap->a_cookies) { 2298 ncookies = count / 16; 2299 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2300 *ap->a_cookies = cookies; 2301 } 2302 2303 if (!error && uio->uio_resid == tresid) { 2304 uio->uio_resid += lost; 2305 nfsstats.direofcache_misses++; 2306 if (ap->a_cookies) 2307 *ap->a_ncookies = 0; 2308 *ap->a_eofflag = 1; 2309 return (0); 2310 } 2311 2312 if (!error && ap->a_cookies) { 2313 /* 2314 * Only the NFS server and emulations use cookies, and they 2315 * load the directory block into system space, so we can 2316 * just look at it directly. 2317 */ 2318 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2319 panic("nfs_readdir: lost in space"); 2320 for (nc = 0; ncookies-- && 2321 base < (char *)uio->uio_iov->iov_base; nc++){ 2322 dp = (struct dirent *) base; 2323 if (dp->d_reclen == 0) 2324 break; 2325 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2326 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2327 else 2328 *(cookies++) = NFS_GETCOOKIE(dp); 2329 base += dp->d_reclen; 2330 } 2331 uio->uio_resid += 2332 ((caddr_t)uio->uio_iov->iov_base - base); 2333 uio->uio_iov->iov_len += 2334 ((caddr_t)uio->uio_iov->iov_base - base); 2335 uio->uio_iov->iov_base = base; 2336 *ap->a_ncookies = nc; 2337 } 2338 2339 uio->uio_resid += lost; 2340 *ap->a_eofflag = 0; 2341 return (error); 2342 } 2343 2344 /* 2345 * Readdir rpc call. 2346 * Called from below the buffer cache by nfs_doio(). 2347 */ 2348 int 2349 nfs_readdirrpc(vp, uiop, cred) 2350 struct vnode *vp; 2351 struct uio *uiop; 2352 struct ucred *cred; 2353 { 2354 int len, left; 2355 struct dirent *dp = NULL; 2356 u_int32_t *tl; 2357 caddr_t cp; 2358 int32_t t1, t2; 2359 caddr_t bpos, dpos, cp2; 2360 struct mbuf *mreq, *mrep, *md, *mb; 2361 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2362 struct nfsnode *dnp = VTONFS(vp); 2363 u_quad_t fileno; 2364 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2365 int attrflag, nrpcs = 0, reclen; 2366 const int v3 = NFS_ISV3(vp); 2367 2368 #ifdef DIAGNOSTIC 2369 /* 2370 * Should be called from buffer cache, so only amount of 2371 * NFS_DIRBLKSIZ will be requested. 2372 */ 2373 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2374 panic("nfs readdirrpc bad uio"); 2375 #endif 2376 2377 /* 2378 * Loop around doing readdir rpc's of size nm_readdirsize 2379 * truncated to a multiple of NFS_DIRFRAGSIZ. 2380 * The stopping criteria is EOF or buffer full. 2381 */ 2382 while (more_dirs && bigenough) { 2383 /* 2384 * Heuristic: don't bother to do another RPC to further 2385 * fill up this block if there is not much room left. (< 50% 2386 * of the readdir RPC size). This wastes some buffer space 2387 * but can save up to 50% in RPC calls. 2388 */ 2389 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2390 bigenough = 0; 2391 break; 2392 } 2393 nfsstats.rpccnt[NFSPROC_READDIR]++; 2394 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2395 NFSX_READDIR(v3)); 2396 nfsm_fhtom(dnp, v3); 2397 if (v3) { 2398 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2399 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2400 txdr_swapcookie3(uiop->uio_offset, tl); 2401 } else { 2402 txdr_cookie3(uiop->uio_offset, tl); 2403 } 2404 tl += 2; 2405 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2406 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2407 } else { 2408 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2409 *tl++ = txdr_unsigned(uiop->uio_offset); 2410 } 2411 *tl = txdr_unsigned(nmp->nm_readdirsize); 2412 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2413 nrpcs++; 2414 if (v3) { 2415 nfsm_postop_attr(vp, attrflag, 0); 2416 if (!error) { 2417 nfsm_dissect(tl, u_int32_t *, 2418 2 * NFSX_UNSIGNED); 2419 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2420 dnp->n_cookieverf.nfsuquad[1] = *tl; 2421 } else { 2422 m_freem(mrep); 2423 goto nfsmout; 2424 } 2425 } 2426 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2427 more_dirs = fxdr_unsigned(int, *tl); 2428 2429 /* loop thru the dir entries, doctoring them to 4bsd form */ 2430 while (more_dirs && bigenough) { 2431 if (v3) { 2432 nfsm_dissect(tl, u_int32_t *, 2433 3 * NFSX_UNSIGNED); 2434 fileno = fxdr_hyper(tl); 2435 len = fxdr_unsigned(int, *(tl + 2)); 2436 } else { 2437 nfsm_dissect(tl, u_int32_t *, 2438 2 * NFSX_UNSIGNED); 2439 fileno = fxdr_unsigned(u_quad_t, *tl++); 2440 len = fxdr_unsigned(int, *tl); 2441 } 2442 if (len <= 0 || len > NFS_MAXNAMLEN) { 2443 error = EBADRPC; 2444 m_freem(mrep); 2445 goto nfsmout; 2446 } 2447 tlen = nfsm_rndup(len); 2448 if (tlen == len) 2449 tlen += 4; /* To ensure null termination */ 2450 tlen += sizeof (off_t) + sizeof (int); 2451 reclen = ALIGN(tlen + DIRHDSIZ); 2452 tlen = reclen - DIRHDSIZ; 2453 left = NFS_DIRFRAGSIZ - blksiz; 2454 if (reclen > left) { 2455 dp->d_reclen += left; 2456 uiop->uio_iov->iov_base = 2457 (caddr_t)uiop->uio_iov->iov_base + left; 2458 uiop->uio_iov->iov_len -= left; 2459 uiop->uio_resid -= left; 2460 blksiz = 0; 2461 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2462 } 2463 if (reclen > uiop->uio_resid) 2464 bigenough = 0; 2465 if (bigenough) { 2466 dp = (struct dirent *)uiop->uio_iov->iov_base; 2467 dp->d_fileno = (int)fileno; 2468 dp->d_namlen = len; 2469 dp->d_reclen = reclen; 2470 dp->d_type = DT_UNKNOWN; 2471 blksiz += dp->d_reclen; 2472 if (blksiz == NFS_DIRFRAGSIZ) 2473 blksiz = 0; 2474 uiop->uio_resid -= DIRHDSIZ; 2475 uiop->uio_iov->iov_base = 2476 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2477 uiop->uio_iov->iov_len -= DIRHDSIZ; 2478 nfsm_mtouio(uiop, len); 2479 cp = uiop->uio_iov->iov_base; 2480 tlen -= len; 2481 *cp = '\0'; /* null terminate */ 2482 uiop->uio_iov->iov_base = 2483 (caddr_t)uiop->uio_iov->iov_base + tlen; 2484 uiop->uio_iov->iov_len -= tlen; 2485 uiop->uio_resid -= tlen; 2486 } else 2487 nfsm_adv(nfsm_rndup(len)); 2488 if (v3) { 2489 nfsm_dissect(tl, u_int32_t *, 2490 3 * NFSX_UNSIGNED); 2491 } else { 2492 nfsm_dissect(tl, u_int32_t *, 2493 2 * NFSX_UNSIGNED); 2494 } 2495 if (bigenough) { 2496 if (v3) { 2497 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2498 uiop->uio_offset = 2499 fxdr_swapcookie3(tl); 2500 else 2501 uiop->uio_offset = 2502 fxdr_cookie3(tl); 2503 } 2504 else { 2505 uiop->uio_offset = 2506 fxdr_unsigned(off_t, *tl); 2507 } 2508 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2509 } 2510 if (v3) 2511 tl += 2; 2512 else 2513 tl++; 2514 more_dirs = fxdr_unsigned(int, *tl); 2515 } 2516 /* 2517 * If at end of rpc data, get the eof boolean 2518 */ 2519 if (!more_dirs) { 2520 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2521 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2522 } 2523 m_freem(mrep); 2524 } 2525 /* 2526 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2527 * by increasing d_reclen for the last record. 2528 */ 2529 if (blksiz > 0) { 2530 left = NFS_DIRFRAGSIZ - blksiz; 2531 dp->d_reclen += left; 2532 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2533 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2534 left; 2535 uiop->uio_iov->iov_len -= left; 2536 uiop->uio_resid -= left; 2537 } 2538 2539 /* 2540 * We are now either at the end of the directory or have filled the 2541 * block. 2542 */ 2543 if (bigenough) 2544 dnp->n_direofoffset = uiop->uio_offset; 2545 nfsmout: 2546 return (error); 2547 } 2548 2549 /* 2550 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2551 */ 2552 int 2553 nfs_readdirplusrpc(vp, uiop, cred) 2554 struct vnode *vp; 2555 struct uio *uiop; 2556 struct ucred *cred; 2557 { 2558 int len, left; 2559 struct dirent *dp = NULL; 2560 u_int32_t *tl; 2561 caddr_t cp; 2562 int32_t t1, t2; 2563 struct vnode *newvp; 2564 caddr_t bpos, dpos, cp2; 2565 struct mbuf *mreq, *mrep, *md, *mb; 2566 struct nameidata nami, *ndp = &nami; 2567 struct componentname *cnp = &ndp->ni_cnd; 2568 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2569 struct nfsnode *dnp = VTONFS(vp), *np; 2570 nfsfh_t *fhp; 2571 u_quad_t fileno; 2572 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2573 int attrflag, fhsize, nrpcs = 0, reclen; 2574 struct nfs_fattr fattr, *fp; 2575 2576 #ifdef DIAGNOSTIC 2577 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2578 panic("nfs readdirplusrpc bad uio"); 2579 #endif 2580 ndp->ni_dvp = vp; 2581 newvp = NULLVP; 2582 2583 /* 2584 * Loop around doing readdir rpc's of size nm_readdirsize 2585 * truncated to a multiple of NFS_DIRFRAGSIZ. 2586 * The stopping criteria is EOF or buffer full. 2587 */ 2588 while (more_dirs && bigenough) { 2589 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2590 bigenough = 0; 2591 break; 2592 } 2593 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2594 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2595 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2596 nfsm_fhtom(dnp, 1); 2597 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2598 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2599 txdr_swapcookie3(uiop->uio_offset, tl); 2600 } else { 2601 txdr_cookie3(uiop->uio_offset, tl); 2602 } 2603 tl += 2; 2604 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2605 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2606 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2607 *tl = txdr_unsigned(nmp->nm_rsize); 2608 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2609 nfsm_postop_attr(vp, attrflag, 0); 2610 if (error) { 2611 m_freem(mrep); 2612 goto nfsmout; 2613 } 2614 nrpcs++; 2615 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2616 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2617 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2618 more_dirs = fxdr_unsigned(int, *tl); 2619 2620 /* loop thru the dir entries, doctoring them to 4bsd form */ 2621 while (more_dirs && bigenough) { 2622 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2623 fileno = fxdr_hyper(tl); 2624 len = fxdr_unsigned(int, *(tl + 2)); 2625 if (len <= 0 || len > NFS_MAXNAMLEN) { 2626 error = EBADRPC; 2627 m_freem(mrep); 2628 goto nfsmout; 2629 } 2630 tlen = nfsm_rndup(len); 2631 if (tlen == len) 2632 tlen += 4; /* To ensure null termination*/ 2633 tlen += sizeof (off_t) + sizeof (int); 2634 reclen = ALIGN(tlen + DIRHDSIZ); 2635 tlen = reclen - DIRHDSIZ; 2636 left = NFS_DIRFRAGSIZ - blksiz; 2637 if (reclen > left) { 2638 /* 2639 * DIRFRAGSIZ is aligned, no need to align 2640 * again here. 2641 */ 2642 dp->d_reclen += left; 2643 uiop->uio_iov->iov_base = 2644 (caddr_t)uiop->uio_iov->iov_base + left; 2645 uiop->uio_iov->iov_len -= left; 2646 uiop->uio_resid -= left; 2647 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2648 blksiz = 0; 2649 } 2650 if (reclen > uiop->uio_resid) 2651 bigenough = 0; 2652 if (bigenough) { 2653 dp = (struct dirent *)uiop->uio_iov->iov_base; 2654 dp->d_fileno = (int)fileno; 2655 dp->d_namlen = len; 2656 dp->d_reclen = reclen; 2657 dp->d_type = DT_UNKNOWN; 2658 blksiz += dp->d_reclen; 2659 if (blksiz == NFS_DIRFRAGSIZ) 2660 blksiz = 0; 2661 uiop->uio_resid -= DIRHDSIZ; 2662 uiop->uio_iov->iov_base = 2663 (caddr_t)uiop->uio_iov->iov_base + 2664 DIRHDSIZ; 2665 uiop->uio_iov->iov_len -= DIRHDSIZ; 2666 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2667 cnp->cn_namelen = len; 2668 nfsm_mtouio(uiop, len); 2669 cp = uiop->uio_iov->iov_base; 2670 tlen -= len; 2671 *cp = '\0'; 2672 uiop->uio_iov->iov_base = 2673 (caddr_t)uiop->uio_iov->iov_base + tlen; 2674 uiop->uio_iov->iov_len -= tlen; 2675 uiop->uio_resid -= tlen; 2676 } else 2677 nfsm_adv(nfsm_rndup(len)); 2678 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2679 if (bigenough) { 2680 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2681 uiop->uio_offset = 2682 fxdr_swapcookie3(tl); 2683 else 2684 uiop->uio_offset = 2685 fxdr_cookie3(tl); 2686 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2687 } 2688 tl += 2; 2689 2690 /* 2691 * Since the attributes are before the file handle 2692 * (sigh), we must skip over the attributes and then 2693 * come back and get them. 2694 */ 2695 attrflag = fxdr_unsigned(int, *tl); 2696 if (attrflag) { 2697 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2698 memcpy(&fattr, fp, NFSX_V3FATTR); 2699 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2700 doit = fxdr_unsigned(int, *tl); 2701 if (doit) { 2702 nfsm_getfh(fhp, fhsize, 1); 2703 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2704 VREF(vp); 2705 newvp = vp; 2706 np = dnp; 2707 } else { 2708 error = nfs_nget(vp->v_mount, fhp, 2709 fhsize, &np); 2710 if (!error) 2711 newvp = NFSTOV(np); 2712 } 2713 if (!error) { 2714 const char *cp; 2715 2716 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2717 dp->d_type = 2718 IFTODT(VTTOIF(np->n_vattr->va_type)); 2719 ndp->ni_vp = newvp; 2720 cp = cnp->cn_nameptr + cnp->cn_namelen; 2721 cnp->cn_hash = 2722 namei_hash(cnp->cn_nameptr, &cp); 2723 if (cnp->cn_namelen <= NCHNAMLEN) { 2724 cache_purge1(ndp->ni_dvp, cnp, 0); 2725 nfs_cache_enter(ndp->ni_dvp, ndp->ni_vp, 2726 cnp); 2727 } 2728 } 2729 } 2730 } else { 2731 /* Just skip over the file handle */ 2732 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2733 i = fxdr_unsigned(int, *tl); 2734 nfsm_adv(nfsm_rndup(i)); 2735 } 2736 if (newvp != NULLVP) { 2737 if (newvp == vp) 2738 vrele(newvp); 2739 else 2740 vput(newvp); 2741 newvp = NULLVP; 2742 } 2743 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2744 more_dirs = fxdr_unsigned(int, *tl); 2745 } 2746 /* 2747 * If at end of rpc data, get the eof boolean 2748 */ 2749 if (!more_dirs) { 2750 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2751 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2752 } 2753 m_freem(mrep); 2754 } 2755 /* 2756 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2757 * by increasing d_reclen for the last record. 2758 */ 2759 if (blksiz > 0) { 2760 left = NFS_DIRFRAGSIZ - blksiz; 2761 dp->d_reclen += left; 2762 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2763 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2764 left; 2765 uiop->uio_iov->iov_len -= left; 2766 uiop->uio_resid -= left; 2767 } 2768 2769 /* 2770 * We are now either at the end of the directory or have filled the 2771 * block. 2772 */ 2773 if (bigenough) 2774 dnp->n_direofoffset = uiop->uio_offset; 2775 nfsmout: 2776 if (newvp != NULLVP) { 2777 if(newvp == vp) 2778 vrele(newvp); 2779 else 2780 vput(newvp); 2781 } 2782 return (error); 2783 } 2784 static char hextoasc[] = "0123456789abcdef"; 2785 2786 /* 2787 * Silly rename. To make the NFS filesystem that is stateless look a little 2788 * more like the "ufs" a remove of an active vnode is translated to a rename 2789 * to a funny looking filename that is removed by nfs_inactive on the 2790 * nfsnode. There is the potential for another process on a different client 2791 * to create the same funny name between the nfs_lookitup() fails and the 2792 * nfs_rename() completes, but... 2793 */ 2794 int 2795 nfs_sillyrename(dvp, vp, cnp) 2796 struct vnode *dvp, *vp; 2797 struct componentname *cnp; 2798 { 2799 struct sillyrename *sp; 2800 struct nfsnode *np; 2801 int error; 2802 short pid; 2803 2804 cache_purge(dvp); 2805 np = VTONFS(vp); 2806 #ifndef DIAGNOSTIC 2807 if (vp->v_type == VDIR) 2808 panic("nfs: sillyrename dir"); 2809 #endif 2810 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2811 M_NFSREQ, M_WAITOK); 2812 sp->s_cred = crdup(cnp->cn_cred); 2813 sp->s_dvp = dvp; 2814 VREF(dvp); 2815 2816 /* Fudge together a funny name */ 2817 pid = cnp->cn_proc->p_pid; 2818 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2819 sp->s_namlen = 12; 2820 sp->s_name[8] = hextoasc[pid & 0xf]; 2821 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2822 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2823 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2824 2825 /* Try lookitups until we get one that isn't there */ 2826 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2827 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2828 sp->s_name[4]++; 2829 if (sp->s_name[4] > 'z') { 2830 error = EINVAL; 2831 goto bad; 2832 } 2833 } 2834 error = nfs_renameit(dvp, cnp, sp); 2835 if (error) 2836 goto bad; 2837 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2838 cnp->cn_proc, &np); 2839 np->n_sillyrename = sp; 2840 return (0); 2841 bad: 2842 vrele(sp->s_dvp); 2843 crfree(sp->s_cred); 2844 free((caddr_t)sp, M_NFSREQ); 2845 return (error); 2846 } 2847 2848 /* 2849 * Look up a file name and optionally either update the file handle or 2850 * allocate an nfsnode, depending on the value of npp. 2851 * npp == NULL --> just do the lookup 2852 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2853 * handled too 2854 * *npp != NULL --> update the file handle in the vnode 2855 */ 2856 int 2857 nfs_lookitup(dvp, name, len, cred, procp, npp) 2858 struct vnode *dvp; 2859 const char *name; 2860 int len; 2861 struct ucred *cred; 2862 struct proc *procp; 2863 struct nfsnode **npp; 2864 { 2865 u_int32_t *tl; 2866 caddr_t cp; 2867 int32_t t1, t2; 2868 struct vnode *newvp = (struct vnode *)0; 2869 struct nfsnode *np, *dnp = VTONFS(dvp); 2870 caddr_t bpos, dpos, cp2; 2871 int error = 0, fhlen, attrflag; 2872 struct mbuf *mreq, *mrep, *md, *mb; 2873 nfsfh_t *nfhp; 2874 const int v3 = NFS_ISV3(dvp); 2875 2876 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2877 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2878 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2879 nfsm_fhtom(dnp, v3); 2880 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2881 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2882 if (npp && !error) { 2883 nfsm_getfh(nfhp, fhlen, v3); 2884 if (*npp) { 2885 np = *npp; 2886 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2887 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2888 np->n_fhp = &np->n_fh; 2889 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2890 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2891 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2892 np->n_fhsize = fhlen; 2893 newvp = NFSTOV(np); 2894 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2895 VREF(dvp); 2896 newvp = dvp; 2897 } else { 2898 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2899 if (error) { 2900 m_freem(mrep); 2901 return (error); 2902 } 2903 newvp = NFSTOV(np); 2904 } 2905 if (v3) { 2906 nfsm_postop_attr(newvp, attrflag, 0); 2907 if (!attrflag && *npp == NULL) { 2908 m_freem(mrep); 2909 vput(newvp); 2910 return (ENOENT); 2911 } 2912 } else 2913 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2914 } 2915 nfsm_reqdone; 2916 if (npp && *npp == NULL) { 2917 if (error) { 2918 if (newvp) 2919 vput(newvp); 2920 } else 2921 *npp = np; 2922 } 2923 return (error); 2924 } 2925 2926 /* 2927 * Nfs Version 3 commit rpc 2928 */ 2929 int 2930 nfs_commit(vp, offset, cnt, procp) 2931 struct vnode *vp; 2932 off_t offset; 2933 uint32_t cnt; 2934 struct proc *procp; 2935 { 2936 caddr_t cp; 2937 u_int32_t *tl; 2938 int32_t t1, t2; 2939 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2940 caddr_t bpos, dpos, cp2; 2941 int error = 0, wccflag = NFSV3_WCCRATTR; 2942 struct mbuf *mreq, *mrep, *md, *mb; 2943 struct nfsnode *np; 2944 2945 KASSERT(NFS_ISV3(vp)); 2946 2947 #ifdef NFS_DEBUG_COMMIT 2948 printf("commit %lu - %lu\n", (unsigned long)offset, 2949 (unsigned long)(offset + cnt)); 2950 #endif 2951 2952 simple_lock(&nmp->nm_slock); 2953 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 2954 simple_unlock(&nmp->nm_slock); 2955 return (0); 2956 } 2957 simple_unlock(&nmp->nm_slock); 2958 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2959 np = VTONFS(vp); 2960 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 2961 nfsm_fhtom(np, 1); 2962 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2963 txdr_hyper(offset, tl); 2964 tl += 2; 2965 *tl = txdr_unsigned(cnt); 2966 nfsm_request(np, NFSPROC_COMMIT, procp, np->n_wcred); 2967 nfsm_wcc_data(vp, wccflag, 0); 2968 if (!error) { 2969 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2970 simple_lock(&nmp->nm_slock); 2971 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 2972 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 2973 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 2974 error = NFSERR_STALEWRITEVERF; 2975 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 2976 } 2977 simple_unlock(&nmp->nm_slock); 2978 } 2979 nfsm_reqdone; 2980 return (error); 2981 } 2982 2983 /* 2984 * Kludge City.. 2985 * - make nfs_bmap() essentially a no-op that does no translation 2986 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2987 * (Maybe I could use the process's page mapping, but I was concerned that 2988 * Kernel Write might not be enabled and also figured copyout() would do 2989 * a lot more work than memcpy() and also it currently happens in the 2990 * context of the swapper process (2). 2991 */ 2992 int 2993 nfs_bmap(v) 2994 void *v; 2995 { 2996 struct vop_bmap_args /* { 2997 struct vnode *a_vp; 2998 daddr_t a_bn; 2999 struct vnode **a_vpp; 3000 daddr_t *a_bnp; 3001 int *a_runp; 3002 } */ *ap = v; 3003 struct vnode *vp = ap->a_vp; 3004 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3005 3006 if (ap->a_vpp != NULL) 3007 *ap->a_vpp = vp; 3008 if (ap->a_bnp != NULL) 3009 *ap->a_bnp = ap->a_bn << bshift; 3010 if (ap->a_runp != NULL) 3011 *ap->a_runp = 1024 * 1024; /* XXX */ 3012 return (0); 3013 } 3014 3015 /* 3016 * Strategy routine. 3017 * For async requests when nfsiod(s) are running, queue the request by 3018 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3019 * request. 3020 */ 3021 int 3022 nfs_strategy(v) 3023 void *v; 3024 { 3025 struct vop_strategy_args *ap = v; 3026 struct buf *bp = ap->a_bp; 3027 struct proc *p; 3028 int error = 0; 3029 3030 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3031 panic("nfs physio/async"); 3032 if (bp->b_flags & B_ASYNC) 3033 p = NULL; 3034 else 3035 p = curproc; /* XXX */ 3036 3037 /* 3038 * If the op is asynchronous and an i/o daemon is waiting 3039 * queue the request, wake it up and wait for completion 3040 * otherwise just do it ourselves. 3041 */ 3042 3043 if ((bp->b_flags & B_ASYNC) == 0 || 3044 nfs_asyncio(bp)) 3045 error = nfs_doio(bp, p); 3046 return (error); 3047 } 3048 3049 /* 3050 * fsync vnode op. Just call nfs_flush() with commit == 1. 3051 */ 3052 /* ARGSUSED */ 3053 int 3054 nfs_fsync(v) 3055 void *v; 3056 { 3057 struct vop_fsync_args /* { 3058 struct vnodeop_desc *a_desc; 3059 struct vnode * a_vp; 3060 struct ucred * a_cred; 3061 int a_flags; 3062 off_t offlo; 3063 off_t offhi; 3064 struct proc * a_p; 3065 } */ *ap = v; 3066 3067 struct vnode *vp = ap->a_vp; 3068 3069 if (vp->v_type != VREG) 3070 return 0; 3071 3072 return (nfs_flush(vp, ap->a_cred, 3073 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3074 } 3075 3076 /* 3077 * Flush all the data associated with a vnode. 3078 */ 3079 int 3080 nfs_flush(vp, cred, waitfor, p, commit) 3081 struct vnode *vp; 3082 struct ucred *cred; 3083 int waitfor; 3084 struct proc *p; 3085 int commit; 3086 { 3087 struct nfsnode *np = VTONFS(vp); 3088 int error; 3089 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3090 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3091 3092 simple_lock(&vp->v_interlock); 3093 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3094 if (np->n_flag & NWRITEERR) { 3095 error = np->n_error; 3096 np->n_flag &= ~NWRITEERR; 3097 } 3098 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3099 return (error); 3100 } 3101 3102 /* 3103 * Return POSIX pathconf information applicable to nfs. 3104 * 3105 * N.B. The NFS V2 protocol doesn't support this RPC. 3106 */ 3107 /* ARGSUSED */ 3108 int 3109 nfs_pathconf(v) 3110 void *v; 3111 { 3112 struct vop_pathconf_args /* { 3113 struct vnode *a_vp; 3114 int a_name; 3115 register_t *a_retval; 3116 } */ *ap = v; 3117 struct nfsv3_pathconf *pcp; 3118 struct vnode *vp = ap->a_vp; 3119 struct mbuf *mreq, *mrep, *md, *mb; 3120 int32_t t1, t2; 3121 u_int32_t *tl; 3122 caddr_t bpos, dpos, cp, cp2; 3123 int error = 0, attrflag; 3124 #ifndef NFS_V2_ONLY 3125 struct nfsmount *nmp; 3126 unsigned int l; 3127 u_int64_t maxsize; 3128 #endif 3129 const int v3 = NFS_ISV3(vp); 3130 struct nfsnode *np = VTONFS(vp); 3131 3132 switch (ap->a_name) { 3133 /* Names that can be resolved locally. */ 3134 case _PC_PIPE_BUF: 3135 *ap->a_retval = PIPE_BUF; 3136 break; 3137 case _PC_SYNC_IO: 3138 *ap->a_retval = 1; 3139 break; 3140 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3141 case _PC_LINK_MAX: 3142 case _PC_NAME_MAX: 3143 case _PC_CHOWN_RESTRICTED: 3144 case _PC_NO_TRUNC: 3145 if (!v3) { 3146 error = EINVAL; 3147 break; 3148 } 3149 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3150 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3151 nfsm_fhtom(np, 1); 3152 nfsm_request(np, NFSPROC_PATHCONF, 3153 curproc, curproc->p_ucred); /* XXX */ 3154 nfsm_postop_attr(vp, attrflag, 0); 3155 if (!error) { 3156 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3157 NFSX_V3PATHCONF); 3158 switch (ap->a_name) { 3159 case _PC_LINK_MAX: 3160 *ap->a_retval = 3161 fxdr_unsigned(register_t, pcp->pc_linkmax); 3162 break; 3163 case _PC_NAME_MAX: 3164 *ap->a_retval = 3165 fxdr_unsigned(register_t, pcp->pc_namemax); 3166 break; 3167 case _PC_CHOWN_RESTRICTED: 3168 *ap->a_retval = 3169 (pcp->pc_chownrestricted == nfs_true); 3170 break; 3171 case _PC_NO_TRUNC: 3172 *ap->a_retval = 3173 (pcp->pc_notrunc == nfs_true); 3174 break; 3175 } 3176 } 3177 nfsm_reqdone; 3178 break; 3179 case _PC_FILESIZEBITS: 3180 #ifndef NFS_V2_ONLY 3181 if (v3) { 3182 nmp = VFSTONFS(vp->v_mount); 3183 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3184 if ((error = nfs_fsinfo(nmp, vp, 3185 curproc->p_ucred, curproc)) != 0) /* XXX */ 3186 break; 3187 for (l = 0, maxsize = nmp->nm_maxfilesize; 3188 (maxsize >> l) > 0; l++) 3189 ; 3190 *ap->a_retval = l + 1; 3191 } else 3192 #endif 3193 { 3194 *ap->a_retval = 32; /* NFS V2 limitation */ 3195 } 3196 break; 3197 default: 3198 error = EINVAL; 3199 break; 3200 } 3201 3202 return (error); 3203 } 3204 3205 /* 3206 * NFS advisory byte-level locks. 3207 */ 3208 int 3209 nfs_advlock(v) 3210 void *v; 3211 { 3212 struct vop_advlock_args /* { 3213 struct vnode *a_vp; 3214 caddr_t a_id; 3215 int a_op; 3216 struct flock *a_fl; 3217 int a_flags; 3218 } */ *ap = v; 3219 struct nfsnode *np = VTONFS(ap->a_vp); 3220 3221 return lf_advlock(ap, &np->n_lockf, np->n_size); 3222 } 3223 3224 /* 3225 * Print out the contents of an nfsnode. 3226 */ 3227 int 3228 nfs_print(v) 3229 void *v; 3230 { 3231 struct vop_print_args /* { 3232 struct vnode *a_vp; 3233 } */ *ap = v; 3234 struct vnode *vp = ap->a_vp; 3235 struct nfsnode *np = VTONFS(vp); 3236 3237 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3238 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3239 if (vp->v_type == VFIFO) 3240 fifo_printinfo(vp); 3241 printf("\n"); 3242 return (0); 3243 } 3244 3245 /* 3246 * NFS file truncation. 3247 */ 3248 int 3249 nfs_truncate(v) 3250 void *v; 3251 { 3252 #if 0 3253 struct vop_truncate_args /* { 3254 struct vnode *a_vp; 3255 off_t a_length; 3256 int a_flags; 3257 struct ucred *a_cred; 3258 struct proc *a_p; 3259 } */ *ap = v; 3260 #endif 3261 3262 /* Use nfs_setattr */ 3263 return (EOPNOTSUPP); 3264 } 3265 3266 /* 3267 * NFS update. 3268 */ 3269 int 3270 nfs_update(v) 3271 void *v; 3272 #if 0 3273 struct vop_update_args /* { 3274 struct vnode *a_vp; 3275 struct timespec *a_ta; 3276 struct timespec *a_tm; 3277 int a_waitfor; 3278 } */ *ap = v; 3279 #endif 3280 { 3281 3282 /* Use nfs_setattr */ 3283 return (EOPNOTSUPP); 3284 } 3285 3286 /* 3287 * Just call bwrite(). 3288 */ 3289 int 3290 nfs_bwrite(v) 3291 void *v; 3292 { 3293 struct vop_bwrite_args /* { 3294 struct vnode *a_bp; 3295 } */ *ap = v; 3296 3297 return (bwrite(ap->a_bp)); 3298 } 3299 3300 /* 3301 * nfs unlock wrapper. 3302 */ 3303 int 3304 nfs_unlock(void *v) 3305 { 3306 struct vop_unlock_args /* { 3307 struct vnode *a_vp; 3308 int a_flags; 3309 } */ *ap = v; 3310 struct vnode *vp = ap->a_vp; 3311 3312 /* 3313 * VOP_UNLOCK can be called by nfs_loadattrcache 3314 * with v_data == 0. 3315 */ 3316 if (VTONFS(vp)) { 3317 nfs_delayedtruncate(vp); 3318 } 3319 3320 return genfs_unlock(v); 3321 } 3322 3323 /* 3324 * nfs special file access vnode op. 3325 * Essentially just get vattr and then imitate iaccess() since the device is 3326 * local to the client. 3327 */ 3328 int 3329 nfsspec_access(v) 3330 void *v; 3331 { 3332 struct vop_access_args /* { 3333 struct vnode *a_vp; 3334 int a_mode; 3335 struct ucred *a_cred; 3336 struct proc *a_p; 3337 } */ *ap = v; 3338 struct vattr va; 3339 struct vnode *vp = ap->a_vp; 3340 int error; 3341 3342 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3343 if (error) 3344 return (error); 3345 3346 /* 3347 * Disallow write attempts on filesystems mounted read-only; 3348 * unless the file is a socket, fifo, or a block or character 3349 * device resident on the filesystem. 3350 */ 3351 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3352 switch (vp->v_type) { 3353 case VREG: 3354 case VDIR: 3355 case VLNK: 3356 return (EROFS); 3357 default: 3358 break; 3359 } 3360 } 3361 3362 return (vaccess(va.va_type, va.va_mode, 3363 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3364 } 3365 3366 /* 3367 * Read wrapper for special devices. 3368 */ 3369 int 3370 nfsspec_read(v) 3371 void *v; 3372 { 3373 struct vop_read_args /* { 3374 struct vnode *a_vp; 3375 struct uio *a_uio; 3376 int a_ioflag; 3377 struct ucred *a_cred; 3378 } */ *ap = v; 3379 struct nfsnode *np = VTONFS(ap->a_vp); 3380 3381 /* 3382 * Set access flag. 3383 */ 3384 np->n_flag |= NACC; 3385 np->n_atim.tv_sec = time.tv_sec; 3386 np->n_atim.tv_nsec = time.tv_usec * 1000; 3387 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3388 } 3389 3390 /* 3391 * Write wrapper for special devices. 3392 */ 3393 int 3394 nfsspec_write(v) 3395 void *v; 3396 { 3397 struct vop_write_args /* { 3398 struct vnode *a_vp; 3399 struct uio *a_uio; 3400 int a_ioflag; 3401 struct ucred *a_cred; 3402 } */ *ap = v; 3403 struct nfsnode *np = VTONFS(ap->a_vp); 3404 3405 /* 3406 * Set update flag. 3407 */ 3408 np->n_flag |= NUPD; 3409 np->n_mtim.tv_sec = time.tv_sec; 3410 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3411 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3412 } 3413 3414 /* 3415 * Close wrapper for special devices. 3416 * 3417 * Update the times on the nfsnode then do device close. 3418 */ 3419 int 3420 nfsspec_close(v) 3421 void *v; 3422 { 3423 struct vop_close_args /* { 3424 struct vnode *a_vp; 3425 int a_fflag; 3426 struct ucred *a_cred; 3427 struct proc *a_p; 3428 } */ *ap = v; 3429 struct vnode *vp = ap->a_vp; 3430 struct nfsnode *np = VTONFS(vp); 3431 struct vattr vattr; 3432 3433 if (np->n_flag & (NACC | NUPD)) { 3434 np->n_flag |= NCHG; 3435 if (vp->v_usecount == 1 && 3436 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3437 VATTR_NULL(&vattr); 3438 if (np->n_flag & NACC) 3439 vattr.va_atime = np->n_atim; 3440 if (np->n_flag & NUPD) 3441 vattr.va_mtime = np->n_mtim; 3442 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3443 } 3444 } 3445 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3446 } 3447 3448 /* 3449 * Read wrapper for fifos. 3450 */ 3451 int 3452 nfsfifo_read(v) 3453 void *v; 3454 { 3455 struct vop_read_args /* { 3456 struct vnode *a_vp; 3457 struct uio *a_uio; 3458 int a_ioflag; 3459 struct ucred *a_cred; 3460 } */ *ap = v; 3461 struct nfsnode *np = VTONFS(ap->a_vp); 3462 3463 /* 3464 * Set access flag. 3465 */ 3466 np->n_flag |= NACC; 3467 np->n_atim.tv_sec = time.tv_sec; 3468 np->n_atim.tv_nsec = time.tv_usec * 1000; 3469 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3470 } 3471 3472 /* 3473 * Write wrapper for fifos. 3474 */ 3475 int 3476 nfsfifo_write(v) 3477 void *v; 3478 { 3479 struct vop_write_args /* { 3480 struct vnode *a_vp; 3481 struct uio *a_uio; 3482 int a_ioflag; 3483 struct ucred *a_cred; 3484 } */ *ap = v; 3485 struct nfsnode *np = VTONFS(ap->a_vp); 3486 3487 /* 3488 * Set update flag. 3489 */ 3490 np->n_flag |= NUPD; 3491 np->n_mtim.tv_sec = time.tv_sec; 3492 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3493 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3494 } 3495 3496 /* 3497 * Close wrapper for fifos. 3498 * 3499 * Update the times on the nfsnode then do fifo close. 3500 */ 3501 int 3502 nfsfifo_close(v) 3503 void *v; 3504 { 3505 struct vop_close_args /* { 3506 struct vnode *a_vp; 3507 int a_fflag; 3508 struct ucred *a_cred; 3509 struct proc *a_p; 3510 } */ *ap = v; 3511 struct vnode *vp = ap->a_vp; 3512 struct nfsnode *np = VTONFS(vp); 3513 struct vattr vattr; 3514 3515 if (np->n_flag & (NACC | NUPD)) { 3516 if (np->n_flag & NACC) { 3517 np->n_atim.tv_sec = time.tv_sec; 3518 np->n_atim.tv_nsec = time.tv_usec * 1000; 3519 } 3520 if (np->n_flag & NUPD) { 3521 np->n_mtim.tv_sec = time.tv_sec; 3522 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3523 } 3524 np->n_flag |= NCHG; 3525 if (vp->v_usecount == 1 && 3526 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3527 VATTR_NULL(&vattr); 3528 if (np->n_flag & NACC) 3529 vattr.va_atime = np->n_atim; 3530 if (np->n_flag & NUPD) 3531 vattr.va_mtime = np->n_mtim; 3532 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3533 } 3534 } 3535 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3536 } 3537
Indexes created Wed Sep 24 22:09:59 GMT 2025