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sys/nfs/nfs_vnops.c
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1 /* $NetBSD: nfs_vnops.c,v 1.186.2.10 2005/03/16 12:50:30 tron 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 1.186.2.10 2005/03/16 12:50:30 tron 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 struct nfsnode *dnp = VTONFS(dvp); 277 278 if (vp != NULL) { 279 struct nfsnode *np = VTONFS(vp); 280 281 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 282 } 283 284 if (!timespecisset(&dnp->n_nctime)) 285 dnp->n_nctime = dnp->n_vattr->va_mtime; 286 287 cache_enter(dvp, vp, cnp); 288 } 289 290 /* 291 * nfs null call from vfs. 292 */ 293 int 294 nfs_null(vp, cred, procp) 295 struct vnode *vp; 296 struct ucred *cred; 297 struct proc *procp; 298 { 299 caddr_t bpos, dpos; 300 int error = 0; 301 struct mbuf *mreq, *mrep, *md, *mb; 302 struct nfsnode *np = VTONFS(vp); 303 304 nfsm_reqhead(np, NFSPROC_NULL, 0); 305 nfsm_request(np, NFSPROC_NULL, procp, cred); 306 nfsm_reqdone; 307 return (error); 308 } 309 310 /* 311 * nfs access vnode op. 312 * For nfs version 2, just return ok. File accesses may fail later. 313 * For nfs version 3, use the access rpc to check accessibility. If file modes 314 * are changed on the server, accesses might still fail later. 315 */ 316 int 317 nfs_access(v) 318 void *v; 319 { 320 struct vop_access_args /* { 321 struct vnode *a_vp; 322 int a_mode; 323 struct ucred *a_cred; 324 struct proc *a_p; 325 } */ *ap = v; 326 struct vnode *vp = ap->a_vp; 327 u_int32_t *tl; 328 caddr_t cp; 329 int32_t t1, t2; 330 caddr_t bpos, dpos, cp2; 331 int error = 0, attrflag, cachevalid; 332 struct mbuf *mreq, *mrep, *md, *mb; 333 u_int32_t mode, rmode; 334 const int v3 = NFS_ISV3(vp); 335 struct nfsnode *np = VTONFS(vp); 336 337 cachevalid = (np->n_accstamp != -1 && 338 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 339 np->n_accuid == ap->a_cred->cr_uid); 340 341 /* 342 * Check access cache first. If this request has been made for this 343 * uid shortly before, use the cached result. 344 */ 345 if (cachevalid) { 346 if (!np->n_accerror) { 347 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 348 return np->n_accerror; 349 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 350 return np->n_accerror; 351 } 352 353 /* 354 * For nfs v3, do an access rpc, otherwise you are stuck emulating 355 * ufs_access() locally using the vattr. This may not be correct, 356 * since the server may apply other access criteria such as 357 * client uid-->server uid mapping that we do not know about, but 358 * this is better than just returning anything that is lying about 359 * in the cache. 360 */ 361 if (v3) { 362 nfsstats.rpccnt[NFSPROC_ACCESS]++; 363 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 364 nfsm_fhtom(np, v3); 365 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 366 if (ap->a_mode & VREAD) 367 mode = NFSV3ACCESS_READ; 368 else 369 mode = 0; 370 if (vp->v_type != VDIR) { 371 if (ap->a_mode & VWRITE) 372 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 373 if (ap->a_mode & VEXEC) 374 mode |= NFSV3ACCESS_EXECUTE; 375 } else { 376 if (ap->a_mode & VWRITE) 377 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 378 NFSV3ACCESS_DELETE); 379 if (ap->a_mode & VEXEC) 380 mode |= NFSV3ACCESS_LOOKUP; 381 } 382 *tl = txdr_unsigned(mode); 383 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 384 nfsm_postop_attr(vp, attrflag, 0); 385 if (!error) { 386 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 387 rmode = fxdr_unsigned(u_int32_t, *tl); 388 /* 389 * The NFS V3 spec does not clarify whether or not 390 * the returned access bits can be a superset of 391 * the ones requested, so... 392 */ 393 if ((rmode & mode) != mode) 394 error = EACCES; 395 } 396 nfsm_reqdone; 397 } else 398 return (nfsspec_access(ap)); 399 /* 400 * Disallow write attempts on filesystems mounted read-only; 401 * unless the file is a socket, fifo, or a block or character 402 * device resident on the filesystem. 403 */ 404 if (!error && (ap->a_mode & VWRITE) && 405 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 406 switch (vp->v_type) { 407 case VREG: 408 case VDIR: 409 case VLNK: 410 error = EROFS; 411 default: 412 break; 413 } 414 } 415 416 if (!error || error == EACCES) { 417 /* 418 * If we got the same result as for a previous, 419 * different request, OR it in. Don't update 420 * the timestamp in that case. 421 */ 422 if (cachevalid && np->n_accstamp != -1 && 423 error == np->n_accerror) { 424 if (!error) 425 np->n_accmode |= ap->a_mode; 426 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 427 np->n_accmode = ap->a_mode; 428 } else { 429 np->n_accstamp = time.tv_sec; 430 np->n_accuid = ap->a_cred->cr_uid; 431 np->n_accmode = ap->a_mode; 432 np->n_accerror = error; 433 } 434 } 435 436 return (error); 437 } 438 439 /* 440 * nfs open vnode op 441 * Check to see if the type is ok 442 * and that deletion is not in progress. 443 * For paged in text files, you will need to flush the page cache 444 * if consistency is lost. 445 */ 446 /* ARGSUSED */ 447 int 448 nfs_open(v) 449 void *v; 450 { 451 struct vop_open_args /* { 452 struct vnode *a_vp; 453 int a_mode; 454 struct ucred *a_cred; 455 struct proc *a_p; 456 } */ *ap = v; 457 struct vnode *vp = ap->a_vp; 458 struct nfsnode *np = VTONFS(vp); 459 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 460 struct vattr vattr; 461 int error; 462 463 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 464 return (EACCES); 465 } 466 467 if (ap->a_mode & FREAD) { 468 if (np->n_rcred != NULL) 469 crfree(np->n_rcred); 470 np->n_rcred = ap->a_cred; 471 crhold(np->n_rcred); 472 } 473 if (ap->a_mode & FWRITE) { 474 if (np->n_wcred != NULL) 475 crfree(np->n_wcred); 476 np->n_wcred = ap->a_cred; 477 crhold(np->n_wcred); 478 } 479 480 #ifndef NFS_V2_ONLY 481 /* 482 * Get a valid lease. If cached data is stale, flush it. 483 */ 484 if (nmp->nm_flag & NFSMNT_NQNFS) { 485 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 486 do { 487 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 488 ap->a_p); 489 } while (error == NQNFS_EXPIRED); 490 if (error) 491 return (error); 492 if (np->n_lrev != np->n_brev || 493 (np->n_flag & NQNFSNONCACHE)) { 494 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 495 ap->a_p, 1)) == EINTR) 496 return (error); 497 np->n_brev = np->n_lrev; 498 } 499 } 500 } else 501 #endif 502 { 503 if (np->n_flag & NMODIFIED) { 504 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 505 ap->a_p, 1)) == EINTR) 506 return (error); 507 NFS_INVALIDATE_ATTRCACHE(np); 508 if (vp->v_type == VDIR) { 509 nfs_invaldircache(vp, 0); 510 np->n_direofoffset = 0; 511 } 512 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 513 if (error) 514 return (error); 515 np->n_mtime = vattr.va_mtime; 516 } else { 517 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 518 if (error) 519 return (error); 520 if (timespeccmp(&np->n_mtime, &vattr.va_mtime, !=)) { 521 if (vp->v_type == VDIR) { 522 nfs_invaldircache(vp, 0); 523 np->n_direofoffset = 0; 524 } 525 if ((error = nfs_vinvalbuf(vp, V_SAVE, 526 ap->a_cred, ap->a_p, 1)) == EINTR) 527 return (error); 528 np->n_mtime = vattr.va_mtime; 529 } 530 } 531 } 532 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 533 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 534 return (0); 535 } 536 537 /* 538 * nfs close vnode op 539 * What an NFS client should do upon close after writing is a debatable issue. 540 * Most NFS clients push delayed writes to the server upon close, basically for 541 * two reasons: 542 * 1 - So that any write errors may be reported back to the client process 543 * doing the close system call. By far the two most likely errors are 544 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 545 * 2 - To put a worst case upper bound on cache inconsistency between 546 * multiple clients for the file. 547 * There is also a consistency problem for Version 2 of the protocol w.r.t. 548 * not being able to tell if other clients are writing a file concurrently, 549 * since there is no way of knowing if the changed modify time in the reply 550 * is only due to the write for this client. 551 * (NFS Version 3 provides weak cache consistency data in the reply that 552 * should be sufficient to detect and handle this case.) 553 * 554 * The current code does the following: 555 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 556 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 557 * or commit them (this satisfies 1 and 2 except for the 558 * case where the server crashes after this close but 559 * before the commit RPC, which is felt to be "good 560 * enough". Changing the last argument to nfs_flush() to 561 * a 1 would force a commit operation, if it is felt a 562 * commit is necessary now. 563 * for NQNFS - do nothing now, since 2 is dealt with via leases and 564 * 1 should be dealt with via an fsync() system call for 565 * cases where write errors are important. 566 */ 567 /* ARGSUSED */ 568 int 569 nfs_close(v) 570 void *v; 571 { 572 struct vop_close_args /* { 573 struct vnodeop_desc *a_desc; 574 struct vnode *a_vp; 575 int a_fflag; 576 struct ucred *a_cred; 577 struct proc *a_p; 578 } */ *ap = v; 579 struct vnode *vp = ap->a_vp; 580 struct nfsnode *np = VTONFS(vp); 581 int error = 0; 582 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 583 584 if (vp->v_type == VREG) { 585 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 586 (np->n_flag & NMODIFIED)) { 587 if (NFS_ISV3(vp)) { 588 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 589 np->n_flag &= ~NMODIFIED; 590 } else 591 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 592 NFS_INVALIDATE_ATTRCACHE(np); 593 } 594 if (np->n_flag & NWRITEERR) { 595 np->n_flag &= ~NWRITEERR; 596 error = np->n_error; 597 } 598 } 599 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 600 return (error); 601 } 602 603 /* 604 * nfs getattr call from vfs. 605 */ 606 int 607 nfs_getattr(v) 608 void *v; 609 { 610 struct vop_getattr_args /* { 611 struct vnode *a_vp; 612 struct vattr *a_vap; 613 struct ucred *a_cred; 614 struct proc *a_p; 615 } */ *ap = v; 616 struct vnode *vp = ap->a_vp; 617 struct nfsnode *np = VTONFS(vp); 618 caddr_t cp; 619 u_int32_t *tl; 620 int32_t t1, t2; 621 caddr_t bpos, dpos; 622 int error = 0; 623 struct mbuf *mreq, *mrep, *md, *mb; 624 const int v3 = NFS_ISV3(vp); 625 626 /* 627 * Update local times for special files. 628 */ 629 if (np->n_flag & (NACC | NUPD)) 630 np->n_flag |= NCHG; 631 632 /* 633 * if we have delayed truncation, do it now. 634 */ 635 nfs_delayedtruncate(vp); 636 637 /* 638 * First look in the cache. 639 */ 640 if (nfs_getattrcache(vp, ap->a_vap) == 0) 641 return (0); 642 nfsstats.rpccnt[NFSPROC_GETATTR]++; 643 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 644 nfsm_fhtom(np, v3); 645 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 646 if (!error) { 647 nfsm_loadattr(vp, ap->a_vap, 0); 648 if (vp->v_type == VDIR && 649 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 650 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 651 } 652 nfsm_reqdone; 653 return (error); 654 } 655 656 /* 657 * nfs setattr call. 658 */ 659 int 660 nfs_setattr(v) 661 void *v; 662 { 663 struct vop_setattr_args /* { 664 struct vnodeop_desc *a_desc; 665 struct vnode *a_vp; 666 struct vattr *a_vap; 667 struct ucred *a_cred; 668 struct proc *a_p; 669 } */ *ap = v; 670 struct vnode *vp = ap->a_vp; 671 struct nfsnode *np = VTONFS(vp); 672 struct vattr *vap = ap->a_vap; 673 int error = 0; 674 u_quad_t tsize = 0; 675 676 /* 677 * Setting of flags is not supported. 678 */ 679 if (vap->va_flags != VNOVAL) 680 return (EOPNOTSUPP); 681 682 /* 683 * Disallow write attempts if the filesystem is mounted read-only. 684 */ 685 if ((vap->va_uid != (uid_t)VNOVAL || 686 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 687 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 688 (vp->v_mount->mnt_flag & MNT_RDONLY)) 689 return (EROFS); 690 if (vap->va_size != VNOVAL) { 691 switch (vp->v_type) { 692 case VDIR: 693 return (EISDIR); 694 case VCHR: 695 case VBLK: 696 case VSOCK: 697 case VFIFO: 698 if (vap->va_mtime.tv_sec == VNOVAL && 699 vap->va_atime.tv_sec == VNOVAL && 700 vap->va_mode == (mode_t)VNOVAL && 701 vap->va_uid == (uid_t)VNOVAL && 702 vap->va_gid == (gid_t)VNOVAL) 703 return (0); 704 vap->va_size = VNOVAL; 705 break; 706 default: 707 /* 708 * Disallow write attempts if the filesystem is 709 * mounted read-only. 710 */ 711 if (vp->v_mount->mnt_flag & MNT_RDONLY) 712 return (EROFS); 713 uvm_vnp_setsize(vp, vap->va_size); 714 tsize = np->n_size; 715 np->n_size = vap->va_size; 716 if (vap->va_size == 0) 717 error = nfs_vinvalbuf(vp, 0, 718 ap->a_cred, ap->a_p, 1); 719 else 720 error = nfs_vinvalbuf(vp, V_SAVE, 721 ap->a_cred, ap->a_p, 1); 722 if (error) { 723 uvm_vnp_setsize(vp, tsize); 724 return (error); 725 } 726 np->n_vattr->va_size = vap->va_size; 727 } 728 } else if ((vap->va_mtime.tv_sec != VNOVAL || 729 vap->va_atime.tv_sec != VNOVAL) && 730 vp->v_type == VREG && 731 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 732 ap->a_p, 1)) == EINTR) 733 return (error); 734 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 735 if (error && vap->va_size != VNOVAL) { 736 np->n_size = np->n_vattr->va_size = tsize; 737 uvm_vnp_setsize(vp, np->n_size); 738 } 739 VN_KNOTE(vp, NOTE_ATTRIB); 740 return (error); 741 } 742 743 /* 744 * Do an nfs setattr rpc. 745 */ 746 int 747 nfs_setattrrpc(vp, vap, cred, procp) 748 struct vnode *vp; 749 struct vattr *vap; 750 struct ucred *cred; 751 struct proc *procp; 752 { 753 struct nfsv2_sattr *sp; 754 caddr_t cp; 755 int32_t t1, t2; 756 caddr_t bpos, dpos, cp2; 757 u_int32_t *tl; 758 int error = 0, wccflag = NFSV3_WCCRATTR; 759 struct mbuf *mreq, *mrep, *md, *mb; 760 const int v3 = NFS_ISV3(vp); 761 struct nfsnode *np = VTONFS(vp); 762 763 nfsstats.rpccnt[NFSPROC_SETATTR]++; 764 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 765 nfsm_fhtom(np, v3); 766 if (v3) { 767 nfsm_v3attrbuild(vap, TRUE); 768 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 769 *tl = nfs_false; 770 } else { 771 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 772 if (vap->va_mode == (mode_t)VNOVAL) 773 sp->sa_mode = nfs_xdrneg1; 774 else 775 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 776 if (vap->va_uid == (uid_t)VNOVAL) 777 sp->sa_uid = nfs_xdrneg1; 778 else 779 sp->sa_uid = txdr_unsigned(vap->va_uid); 780 if (vap->va_gid == (gid_t)VNOVAL) 781 sp->sa_gid = nfs_xdrneg1; 782 else 783 sp->sa_gid = txdr_unsigned(vap->va_gid); 784 sp->sa_size = txdr_unsigned(vap->va_size); 785 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 786 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 787 } 788 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 789 if (v3) { 790 nfsm_wcc_data(vp, wccflag, 0); 791 } else 792 nfsm_loadattr(vp, (struct vattr *)0, 0); 793 nfsm_reqdone; 794 return (error); 795 } 796 797 /* 798 * nfs lookup call, one step at a time... 799 * First look in cache 800 * If not found, unlock the directory nfsnode and do the rpc 801 * 802 * This code is full of lock/unlock statements and checks, because 803 * we continue after cache_lookup has finished (we need to check 804 * with the attr cache and do an rpc if it has timed out). This means 805 * that the locking effects of cache_lookup have to be taken into 806 * account. 807 */ 808 int 809 nfs_lookup(v) 810 void *v; 811 { 812 struct vop_lookup_args /* { 813 struct vnodeop_desc *a_desc; 814 struct vnode *a_dvp; 815 struct vnode **a_vpp; 816 struct componentname *a_cnp; 817 } */ *ap = v; 818 struct componentname *cnp = ap->a_cnp; 819 struct vnode *dvp = ap->a_dvp; 820 struct vnode **vpp = ap->a_vpp; 821 int flags; 822 struct vnode *newvp; 823 u_int32_t *tl; 824 caddr_t cp; 825 int32_t t1, t2; 826 caddr_t bpos, dpos, cp2; 827 struct mbuf *mreq, *mrep, *md, *mb; 828 long len; 829 nfsfh_t *fhp; 830 struct nfsnode *np; 831 int lockparent, wantparent, error = 0, attrflag, fhsize; 832 const int v3 = NFS_ISV3(dvp); 833 834 cnp->cn_flags &= ~PDIRUNLOCK; 835 flags = cnp->cn_flags; 836 837 *vpp = NULLVP; 838 newvp = NULLVP; 839 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 840 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 841 return (EROFS); 842 if (dvp->v_type != VDIR) 843 return (ENOTDIR); 844 845 lockparent = flags & LOCKPARENT; 846 wantparent = flags & (LOCKPARENT|WANTPARENT); 847 np = VTONFS(dvp); 848 849 /* 850 * Before tediously performing a linear scan of the directory, 851 * check the name cache to see if the directory/name pair 852 * we are looking for is known already. 853 * If the directory/name pair is found in the name cache, 854 * we have to ensure the directory has not changed from 855 * the time the cache entry has been created. If it has, 856 * the cache entry has to be ignored. 857 */ 858 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 859 struct vattr vattr; 860 int err2; 861 862 if (error && error != ENOENT) { 863 *vpp = NULLVP; 864 return error; 865 } 866 867 if (cnp->cn_flags & PDIRUNLOCK) { 868 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 869 if (err2 != 0) { 870 *vpp = NULLVP; 871 return err2; 872 } 873 cnp->cn_flags &= ~PDIRUNLOCK; 874 } 875 876 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 877 if (err2 != 0) { 878 if (error == 0) { 879 if (*vpp != dvp) 880 vput(*vpp); 881 else 882 vrele(*vpp); 883 } 884 *vpp = NULLVP; 885 return err2; 886 } 887 888 if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 889 cnp->cn_proc) || timespeccmp(&vattr.va_mtime, 890 &VTONFS(dvp)->n_nctime, !=)) { 891 if (error == 0) { 892 if (*vpp != dvp) 893 vput(*vpp); 894 else 895 vrele(*vpp); 896 *vpp = NULLVP; 897 } 898 cache_purge1(dvp, NULL, PURGE_CHILDREN); 899 timespecclear(&np->n_nctime); 900 goto dorpc; 901 } 902 903 if (error == ENOENT) { 904 return ENOENT; 905 } 906 907 newvp = *vpp; 908 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 909 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 910 { 911 nfsstats.lookupcache_hits++; 912 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 913 cnp->cn_flags |= SAVENAME; 914 if ((!lockparent || !(flags & ISLASTCN)) && 915 newvp != dvp) 916 VOP_UNLOCK(dvp, 0); 917 KASSERT(newvp->v_type != VNON); 918 return (0); 919 } 920 cache_purge1(newvp, NULL, PURGE_PARENTS); 921 if (newvp != dvp) 922 vput(newvp); 923 else 924 vrele(newvp); 925 *vpp = NULLVP; 926 } 927 dorpc: 928 error = 0; 929 newvp = NULLVP; 930 nfsstats.lookupcache_misses++; 931 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 932 len = cnp->cn_namelen; 933 nfsm_reqhead(np, NFSPROC_LOOKUP, 934 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 935 nfsm_fhtom(np, v3); 936 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 937 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 938 if (error) { 939 nfsm_postop_attr(dvp, attrflag, 0); 940 m_freem(mrep); 941 goto nfsmout; 942 } 943 nfsm_getfh(fhp, fhsize, v3); 944 945 /* 946 * Handle RENAME case... 947 */ 948 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 949 if (NFS_CMPFH(np, fhp, fhsize)) { 950 m_freem(mrep); 951 return (EISDIR); 952 } 953 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 954 if (error) { 955 m_freem(mrep); 956 return error; 957 } 958 newvp = NFSTOV(np); 959 if (v3) { 960 nfsm_postop_attr(newvp, attrflag, 0); 961 nfsm_postop_attr(dvp, attrflag, 0); 962 } else 963 nfsm_loadattr(newvp, (struct vattr *)0, 0); 964 *vpp = newvp; 965 m_freem(mrep); 966 cnp->cn_flags |= SAVENAME; 967 if (!lockparent) { 968 VOP_UNLOCK(dvp, 0); 969 cnp->cn_flags |= PDIRUNLOCK; 970 } 971 goto validate; 972 } 973 974 /* 975 * The postop attr handling is duplicated for each if case, 976 * because it should be done while dvp is locked (unlocking 977 * dvp is different for each case). 978 */ 979 980 if (NFS_CMPFH(np, fhp, fhsize)) { 981 /* 982 * "." lookup 983 */ 984 VREF(dvp); 985 newvp = dvp; 986 if (v3) { 987 nfsm_postop_attr(newvp, attrflag, 0); 988 nfsm_postop_attr(dvp, attrflag, 0); 989 } else 990 nfsm_loadattr(newvp, (struct vattr *)0, 0); 991 } else if (flags & ISDOTDOT) { 992 /* 993 * ".." lookup 994 */ 995 VOP_UNLOCK(dvp, 0); 996 cnp->cn_flags |= PDIRUNLOCK; 997 998 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 999 if (error) { 1000 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1001 cnp->cn_flags &= ~PDIRUNLOCK; 1002 m_freem(mrep); 1003 return error; 1004 } 1005 newvp = NFSTOV(np); 1006 1007 if (v3) { 1008 nfsm_postop_attr(newvp, attrflag, 0); 1009 nfsm_postop_attr(dvp, attrflag, 0); 1010 } else 1011 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1012 1013 if (lockparent && (flags & ISLASTCN)) { 1014 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1015 m_freem(mrep); 1016 vput(newvp); 1017 return error; 1018 } 1019 cnp->cn_flags &= ~PDIRUNLOCK; 1020 } 1021 } else { 1022 /* 1023 * Other lookups. 1024 */ 1025 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1026 if (error) { 1027 m_freem(mrep); 1028 return error; 1029 } 1030 newvp = NFSTOV(np); 1031 if (v3) { 1032 nfsm_postop_attr(newvp, attrflag, 0); 1033 nfsm_postop_attr(dvp, attrflag, 0); 1034 } else 1035 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1036 if (!lockparent || !(flags & ISLASTCN)) { 1037 VOP_UNLOCK(dvp, 0); 1038 cnp->cn_flags |= PDIRUNLOCK; 1039 } 1040 } 1041 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1042 cnp->cn_flags |= SAVENAME; 1043 if ((cnp->cn_flags & MAKEENTRY) && 1044 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1045 nfs_cache_enter(dvp, newvp, cnp); 1046 } 1047 *vpp = newvp; 1048 nfsm_reqdone; 1049 if (error) { 1050 /* 1051 * We get here only because of errors returned by 1052 * the RPC. Otherwise we'll have returned above 1053 * (the nfsm_* macros will jump to nfsm_reqdone 1054 * on error). 1055 */ 1056 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1057 cnp->cn_nameiop != CREATE) { 1058 nfs_cache_enter(dvp, NULL, cnp); 1059 } 1060 if (newvp != NULLVP) { 1061 vrele(newvp); 1062 if (newvp != dvp) 1063 VOP_UNLOCK(newvp, 0); 1064 } 1065 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1066 (flags & ISLASTCN) && error == ENOENT) { 1067 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1068 error = EROFS; 1069 else 1070 error = EJUSTRETURN; 1071 } 1072 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1073 cnp->cn_flags |= SAVENAME; 1074 *vpp = NULL; 1075 return error; 1076 } 1077 1078 validate: 1079 /* 1080 * make sure we have valid type and size. 1081 */ 1082 1083 newvp = *vpp; 1084 if (newvp->v_type == VNON) { 1085 struct vattr vattr; /* dummy */ 1086 1087 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1088 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc); 1089 if (error) { 1090 vput(newvp); 1091 *vpp = NULL; 1092 } 1093 } 1094 1095 return error; 1096 } 1097 1098 /* 1099 * nfs read call. 1100 * Just call nfs_bioread() to do the work. 1101 */ 1102 int 1103 nfs_read(v) 1104 void *v; 1105 { 1106 struct vop_read_args /* { 1107 struct vnode *a_vp; 1108 struct uio *a_uio; 1109 int a_ioflag; 1110 struct ucred *a_cred; 1111 } */ *ap = v; 1112 struct vnode *vp = ap->a_vp; 1113 1114 if (vp->v_type != VREG) 1115 return (EPERM); 1116 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1117 } 1118 1119 /* 1120 * nfs readlink call 1121 */ 1122 int 1123 nfs_readlink(v) 1124 void *v; 1125 { 1126 struct vop_readlink_args /* { 1127 struct vnode *a_vp; 1128 struct uio *a_uio; 1129 struct ucred *a_cred; 1130 } */ *ap = v; 1131 struct vnode *vp = ap->a_vp; 1132 1133 if (vp->v_type != VLNK) 1134 return (EPERM); 1135 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1136 } 1137 1138 /* 1139 * Do a readlink rpc. 1140 * Called by nfs_doio() from below the buffer cache. 1141 */ 1142 int 1143 nfs_readlinkrpc(vp, uiop, cred) 1144 struct vnode *vp; 1145 struct uio *uiop; 1146 struct ucred *cred; 1147 { 1148 u_int32_t *tl; 1149 caddr_t cp; 1150 int32_t t1, t2; 1151 caddr_t bpos, dpos, cp2; 1152 int error = 0, attrflag; 1153 uint32_t len; 1154 struct mbuf *mreq, *mrep, *md, *mb; 1155 const int v3 = NFS_ISV3(vp); 1156 struct nfsnode *np = VTONFS(vp); 1157 1158 nfsstats.rpccnt[NFSPROC_READLINK]++; 1159 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1160 nfsm_fhtom(np, v3); 1161 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1162 if (v3) 1163 nfsm_postop_attr(vp, attrflag, 0); 1164 if (!error) { 1165 if (v3) { 1166 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1167 len = fxdr_unsigned(uint32_t, *tl); 1168 if (len > MAXPATHLEN) { 1169 /* 1170 * this pathname is too long for us. 1171 */ 1172 m_freem(mrep); 1173 /* Solaris returns EINVAL. should we follow? */ 1174 error = ENAMETOOLONG; 1175 goto nfsmout; 1176 } 1177 } else { 1178 nfsm_strsiz(len, NFS_MAXPATHLEN); 1179 } 1180 nfsm_mtouio(uiop, len); 1181 } 1182 nfsm_reqdone; 1183 return (error); 1184 } 1185 1186 /* 1187 * nfs read rpc call 1188 * Ditto above 1189 */ 1190 int 1191 nfs_readrpc(vp, uiop) 1192 struct vnode *vp; 1193 struct uio *uiop; 1194 { 1195 u_int32_t *tl; 1196 caddr_t cp; 1197 int32_t t1, t2; 1198 caddr_t bpos, dpos, cp2; 1199 struct mbuf *mreq, *mrep, *md, *mb; 1200 struct nfsmount *nmp; 1201 int error = 0, len, retlen, tsiz, eof, attrflag; 1202 const int v3 = NFS_ISV3(vp); 1203 struct nfsnode *np = VTONFS(vp); 1204 1205 #ifndef nolint 1206 eof = 0; 1207 #endif 1208 nmp = VFSTONFS(vp->v_mount); 1209 tsiz = uiop->uio_resid; 1210 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1211 return (EFBIG); 1212 while (tsiz > 0) { 1213 nfsstats.rpccnt[NFSPROC_READ]++; 1214 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1215 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1216 nfsm_fhtom(np, v3); 1217 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1218 if (v3) { 1219 txdr_hyper(uiop->uio_offset, tl); 1220 *(tl + 2) = txdr_unsigned(len); 1221 } else { 1222 *tl++ = txdr_unsigned(uiop->uio_offset); 1223 *tl++ = txdr_unsigned(len); 1224 *tl = 0; 1225 } 1226 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, np->n_rcred); 1227 if (v3) { 1228 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1229 if (error) { 1230 m_freem(mrep); 1231 goto nfsmout; 1232 } 1233 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1234 eof = fxdr_unsigned(int, *(tl + 1)); 1235 } else 1236 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1237 nfsm_strsiz(retlen, nmp->nm_rsize); 1238 nfsm_mtouio(uiop, retlen); 1239 m_freem(mrep); 1240 tsiz -= retlen; 1241 if (v3) { 1242 if (eof || retlen == 0) 1243 tsiz = 0; 1244 } else if (retlen < len) 1245 tsiz = 0; 1246 } 1247 nfsmout: 1248 return (error); 1249 } 1250 1251 struct nfs_writerpc_context { 1252 struct simplelock nwc_slock; 1253 volatile int nwc_mbufcount; 1254 }; 1255 1256 /* 1257 * free mbuf used to refer protected pages while write rpc call. 1258 * called at splvm. 1259 */ 1260 static void 1261 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1262 { 1263 struct nfs_writerpc_context *ctx = arg; 1264 1265 KASSERT(m != NULL); 1266 KASSERT(ctx != NULL); 1267 pool_cache_put(&mbpool_cache, m); 1268 simple_lock(&ctx->nwc_slock); 1269 if (--ctx->nwc_mbufcount == 0) { 1270 wakeup(ctx); 1271 } 1272 simple_unlock(&ctx->nwc_slock); 1273 } 1274 1275 /* 1276 * nfs write call 1277 */ 1278 int 1279 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1280 struct vnode *vp; 1281 struct uio *uiop; 1282 int *iomode; 1283 boolean_t pageprotected; 1284 boolean_t *stalewriteverfp; 1285 { 1286 u_int32_t *tl; 1287 caddr_t cp; 1288 int32_t t1, t2; 1289 caddr_t bpos, dpos, cp2; 1290 struct mbuf *mreq, *mrep, *md, *mb; 1291 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1292 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1293 const int v3 = NFS_ISV3(vp); 1294 int committed = NFSV3WRITE_FILESYNC; 1295 struct nfsnode *np = VTONFS(vp); 1296 struct nfs_writerpc_context ctx; 1297 int s; 1298 struct lwp *l = NULL; 1299 size_t origresid; 1300 1301 simple_lock_init(&ctx.nwc_slock); 1302 ctx.nwc_mbufcount = 1; 1303 1304 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1305 panic("writerpc readonly vp %p", vp); 1306 } 1307 1308 #ifdef DIAGNOSTIC 1309 if (uiop->uio_iovcnt != 1) 1310 panic("nfs: writerpc iovcnt > 1"); 1311 #endif 1312 tsiz = uiop->uio_resid; 1313 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1314 return (EFBIG); 1315 if (pageprotected) { 1316 l = curlwp; 1317 PHOLD(l); 1318 } 1319 retry: 1320 origresid = uiop->uio_resid; 1321 KASSERT(origresid == uiop->uio_iov->iov_len); 1322 while (tsiz > 0) { 1323 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1324 uint32_t backup; 1325 boolean_t stalewriteverf = FALSE; 1326 1327 nfsstats.rpccnt[NFSPROC_WRITE]++; 1328 len = min(tsiz, nmp->nm_wsize); 1329 datalen = pageprotected ? 0 : nfsm_rndup(len); 1330 nfsm_reqhead(np, NFSPROC_WRITE, 1331 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1332 nfsm_fhtom(np, v3); 1333 if (v3) { 1334 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1335 txdr_hyper(uiop->uio_offset, tl); 1336 tl += 2; 1337 *tl++ = txdr_unsigned(len); 1338 *tl++ = txdr_unsigned(*iomode); 1339 *tl = txdr_unsigned(len); 1340 } else { 1341 u_int32_t x; 1342 1343 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1344 /* Set both "begin" and "current" to non-garbage. */ 1345 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1346 *tl++ = x; /* "begin offset" */ 1347 *tl++ = x; /* "current offset" */ 1348 x = txdr_unsigned(len); 1349 *tl++ = x; /* total to this offset */ 1350 *tl = x; /* size of this write */ 1351 1352 } 1353 if (pageprotected) { 1354 /* 1355 * since we know pages can't be modified during i/o, 1356 * no need to copy them for us. 1357 */ 1358 struct mbuf *m; 1359 struct iovec *iovp = uiop->uio_iov; 1360 1361 m = m_get(M_WAIT, MT_DATA); 1362 MCLAIM(m, &nfs_mowner); 1363 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1364 nfs_writerpc_extfree, &ctx); 1365 m->m_flags |= M_EXT_ROMAP; 1366 m->m_len = len; 1367 mb->m_next = m; 1368 /* 1369 * no need to maintain mb and bpos here 1370 * because no one care them later. 1371 */ 1372 #if 0 1373 mb = m; 1374 bpos = mtod(caddr_t, mb) + mb->m_len; 1375 #endif 1376 iovp->iov_base = (char *)iovp->iov_base + len; 1377 iovp->iov_len -= len; 1378 uiop->uio_offset += len; 1379 uiop->uio_resid -= len; 1380 s = splvm(); 1381 simple_lock(&ctx.nwc_slock); 1382 ctx.nwc_mbufcount++; 1383 simple_unlock(&ctx.nwc_slock); 1384 splx(s); 1385 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1386 } else { 1387 nfsm_uiotom(uiop, len); 1388 } 1389 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, np->n_wcred); 1390 if (v3) { 1391 wccflag = NFSV3_WCCCHK; 1392 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1393 if (!error) { 1394 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1395 + NFSX_V3WRITEVERF); 1396 rlen = fxdr_unsigned(int, *tl++); 1397 if (rlen == 0) { 1398 error = NFSERR_IO; 1399 m_freem(mrep); 1400 break; 1401 } else if (rlen < len) { 1402 backup = len - rlen; 1403 uiop->uio_iov->iov_base = 1404 (caddr_t)uiop->uio_iov->iov_base - 1405 backup; 1406 uiop->uio_iov->iov_len += backup; 1407 uiop->uio_offset -= backup; 1408 uiop->uio_resid += backup; 1409 len = rlen; 1410 } 1411 commit = fxdr_unsigned(int, *tl++); 1412 1413 /* 1414 * Return the lowest committment level 1415 * obtained by any of the RPCs. 1416 */ 1417 if (committed == NFSV3WRITE_FILESYNC) 1418 committed = commit; 1419 else if (committed == NFSV3WRITE_DATASYNC && 1420 commit == NFSV3WRITE_UNSTABLE) 1421 committed = commit; 1422 simple_lock(&nmp->nm_slock); 1423 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1424 memcpy(nmp->nm_writeverf, tl, 1425 NFSX_V3WRITEVERF); 1426 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1427 } else if ((nmp->nm_iflag & 1428 NFSMNT_STALEWRITEVERF) || 1429 memcmp(tl, nmp->nm_writeverf, 1430 NFSX_V3WRITEVERF)) { 1431 memcpy(nmp->nm_writeverf, tl, 1432 NFSX_V3WRITEVERF); 1433 /* 1434 * note NFSMNT_STALEWRITEVERF 1435 * if we're the first thread to 1436 * notice it. 1437 */ 1438 if ((nmp->nm_iflag & 1439 NFSMNT_STALEWRITEVERF) == 0) { 1440 stalewriteverf = TRUE; 1441 nmp->nm_iflag |= 1442 NFSMNT_STALEWRITEVERF; 1443 } 1444 } 1445 simple_unlock(&nmp->nm_slock); 1446 } 1447 } else 1448 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1449 if (wccflag) 1450 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1451 m_freem(mrep); 1452 if (error) 1453 break; 1454 tsiz -= len; 1455 if (stalewriteverf) { 1456 *stalewriteverfp = TRUE; 1457 stalewriteverf = FALSE; 1458 if (committed == NFSV3WRITE_UNSTABLE && 1459 len != origresid) { 1460 /* 1461 * if our write requests weren't atomic but 1462 * unstable, datas in previous iterations 1463 * might have already been lost now. 1464 * then, we should resend them to nfsd. 1465 */ 1466 backup = origresid - tsiz; 1467 uiop->uio_iov->iov_base = 1468 (caddr_t)uiop->uio_iov->iov_base - backup; 1469 uiop->uio_iov->iov_len += backup; 1470 uiop->uio_offset -= backup; 1471 uiop->uio_resid += backup; 1472 tsiz = origresid; 1473 goto retry; 1474 } 1475 } 1476 } 1477 if (pageprotected) { 1478 /* 1479 * wait until mbufs go away. 1480 * retransmitted mbufs can survive longer than rpc requests 1481 * themselves. 1482 */ 1483 s = splvm(); 1484 simple_lock(&ctx.nwc_slock); 1485 ctx.nwc_mbufcount--; 1486 while (ctx.nwc_mbufcount > 0) { 1487 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1488 } 1489 simple_unlock(&ctx.nwc_slock); 1490 splx(s); 1491 PRELE(l); 1492 } 1493 nfsmout: 1494 *iomode = committed; 1495 if (error) 1496 uiop->uio_resid = tsiz; 1497 return (error); 1498 } 1499 1500 /* 1501 * nfs mknod rpc 1502 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1503 * mode set to specify the file type and the size field for rdev. 1504 */ 1505 int 1506 nfs_mknodrpc(dvp, vpp, cnp, vap) 1507 struct vnode *dvp; 1508 struct vnode **vpp; 1509 struct componentname *cnp; 1510 struct vattr *vap; 1511 { 1512 struct nfsv2_sattr *sp; 1513 u_int32_t *tl; 1514 caddr_t cp; 1515 int32_t t1, t2; 1516 struct vnode *newvp = (struct vnode *)0; 1517 struct nfsnode *dnp, *np; 1518 char *cp2; 1519 caddr_t bpos, dpos; 1520 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1521 struct mbuf *mreq, *mrep, *md, *mb; 1522 u_int32_t rdev; 1523 const int v3 = NFS_ISV3(dvp); 1524 1525 if (vap->va_type == VCHR || vap->va_type == VBLK) 1526 rdev = txdr_unsigned(vap->va_rdev); 1527 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1528 rdev = nfs_xdrneg1; 1529 else { 1530 VOP_ABORTOP(dvp, cnp); 1531 vput(dvp); 1532 return (EOPNOTSUPP); 1533 } 1534 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1535 dnp = VTONFS(dvp); 1536 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1537 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1538 nfsm_fhtom(dnp, v3); 1539 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1540 if (v3) { 1541 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1542 *tl++ = vtonfsv3_type(vap->va_type); 1543 nfsm_v3attrbuild(vap, FALSE); 1544 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1545 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1546 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1547 *tl = txdr_unsigned(minor(vap->va_rdev)); 1548 } 1549 } else { 1550 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1551 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1552 sp->sa_uid = nfs_xdrneg1; 1553 sp->sa_gid = nfs_xdrneg1; 1554 sp->sa_size = rdev; 1555 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1556 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1557 } 1558 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1559 if (!error) { 1560 nfsm_mtofh(dvp, newvp, v3, gotvp); 1561 if (!gotvp) { 1562 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1563 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1564 if (!error) 1565 newvp = NFSTOV(np); 1566 } 1567 } 1568 if (v3) 1569 nfsm_wcc_data(dvp, wccflag, 0); 1570 nfsm_reqdone; 1571 if (error) { 1572 if (newvp) 1573 vput(newvp); 1574 } else { 1575 if (cnp->cn_flags & MAKEENTRY) 1576 nfs_cache_enter(dvp, newvp, cnp); 1577 *vpp = newvp; 1578 } 1579 PNBUF_PUT(cnp->cn_pnbuf); 1580 VTONFS(dvp)->n_flag |= NMODIFIED; 1581 if (!wccflag) 1582 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1583 vput(dvp); 1584 return (error); 1585 } 1586 1587 /* 1588 * nfs mknod vop 1589 * just call nfs_mknodrpc() to do the work. 1590 */ 1591 /* ARGSUSED */ 1592 int 1593 nfs_mknod(v) 1594 void *v; 1595 { 1596 struct vop_mknod_args /* { 1597 struct vnode *a_dvp; 1598 struct vnode **a_vpp; 1599 struct componentname *a_cnp; 1600 struct vattr *a_vap; 1601 } */ *ap = v; 1602 int error; 1603 1604 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1605 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1606 return (error); 1607 } 1608 1609 static u_long create_verf; 1610 /* 1611 * nfs file create call 1612 */ 1613 int 1614 nfs_create(v) 1615 void *v; 1616 { 1617 struct vop_create_args /* { 1618 struct vnode *a_dvp; 1619 struct vnode **a_vpp; 1620 struct componentname *a_cnp; 1621 struct vattr *a_vap; 1622 } */ *ap = v; 1623 struct vnode *dvp = ap->a_dvp; 1624 struct vattr *vap = ap->a_vap; 1625 struct componentname *cnp = ap->a_cnp; 1626 struct nfsv2_sattr *sp; 1627 u_int32_t *tl; 1628 caddr_t cp; 1629 int32_t t1, t2; 1630 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1631 struct vnode *newvp = (struct vnode *)0; 1632 caddr_t bpos, dpos, cp2; 1633 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1634 struct mbuf *mreq, *mrep, *md, *mb; 1635 const int v3 = NFS_ISV3(dvp); 1636 1637 /* 1638 * Oops, not for me.. 1639 */ 1640 if (vap->va_type == VSOCK) 1641 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1642 1643 KASSERT(vap->va_type == VREG); 1644 1645 #ifdef VA_EXCLUSIVE 1646 if (vap->va_vaflags & VA_EXCLUSIVE) 1647 fmode |= O_EXCL; 1648 #endif 1649 again: 1650 error = 0; 1651 nfsstats.rpccnt[NFSPROC_CREATE]++; 1652 dnp = VTONFS(dvp); 1653 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1654 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1655 nfsm_fhtom(dnp, v3); 1656 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1657 if (v3) { 1658 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1659 if (fmode & O_EXCL) { 1660 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1661 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1662 #ifdef INET 1663 if (TAILQ_FIRST(&in_ifaddr)) 1664 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1665 else 1666 *tl++ = create_verf; 1667 #else 1668 *tl++ = create_verf; 1669 #endif 1670 *tl = ++create_verf; 1671 } else { 1672 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1673 nfsm_v3attrbuild(vap, FALSE); 1674 } 1675 } else { 1676 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1677 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1678 sp->sa_uid = nfs_xdrneg1; 1679 sp->sa_gid = nfs_xdrneg1; 1680 sp->sa_size = 0; 1681 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1682 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1683 } 1684 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1685 if (!error) { 1686 nfsm_mtofh(dvp, newvp, v3, gotvp); 1687 if (!gotvp) { 1688 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1689 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1690 if (!error) 1691 newvp = NFSTOV(np); 1692 } 1693 } 1694 if (v3) 1695 nfsm_wcc_data(dvp, wccflag, 0); 1696 nfsm_reqdone; 1697 if (error) { 1698 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1699 fmode &= ~O_EXCL; 1700 goto again; 1701 } 1702 if (newvp) 1703 vput(newvp); 1704 } else if (v3 && (fmode & O_EXCL)) { 1705 struct timeval tm = time; 1706 1707 /* 1708 * make sure that we'll update timestamps as 1709 * most server implementations use them to store 1710 * the create verifier. 1711 * 1712 * XXX it's better to use TOSERVER always. 1713 */ 1714 1715 if (vap->va_atime.tv_sec == VNOVAL) { 1716 vap->va_atime.tv_sec = tm.tv_sec; 1717 vap->va_atime.tv_nsec = tm.tv_usec * 1000; 1718 } 1719 if (vap->va_mtime.tv_sec == VNOVAL) { 1720 vap->va_mtime.tv_sec = tm.tv_sec; 1721 vap->va_mtime.tv_nsec = tm.tv_usec * 1000; 1722 } 1723 1724 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1725 } 1726 if (!error) { 1727 if (cnp->cn_flags & MAKEENTRY) 1728 nfs_cache_enter(dvp, newvp, cnp); 1729 *ap->a_vpp = newvp; 1730 } 1731 PNBUF_PUT(cnp->cn_pnbuf); 1732 VTONFS(dvp)->n_flag |= NMODIFIED; 1733 if (!wccflag) 1734 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1735 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1736 vput(dvp); 1737 return (error); 1738 } 1739 1740 /* 1741 * nfs file remove call 1742 * To try and make nfs semantics closer to ufs semantics, a file that has 1743 * other processes using the vnode is renamed instead of removed and then 1744 * removed later on the last close. 1745 * - If v_usecount > 1 1746 * If a rename is not already in the works 1747 * call nfs_sillyrename() to set it up 1748 * else 1749 * do the remove rpc 1750 */ 1751 int 1752 nfs_remove(v) 1753 void *v; 1754 { 1755 struct vop_remove_args /* { 1756 struct vnodeop_desc *a_desc; 1757 struct vnode * a_dvp; 1758 struct vnode * a_vp; 1759 struct componentname * a_cnp; 1760 } */ *ap = v; 1761 struct vnode *vp = ap->a_vp; 1762 struct vnode *dvp = ap->a_dvp; 1763 struct componentname *cnp = ap->a_cnp; 1764 struct nfsnode *np = VTONFS(vp); 1765 int error = 0; 1766 struct vattr vattr; 1767 1768 #ifndef DIAGNOSTIC 1769 if ((cnp->cn_flags & HASBUF) == 0) 1770 panic("nfs_remove: no name"); 1771 if (vp->v_usecount < 1) 1772 panic("nfs_remove: bad v_usecount"); 1773 #endif 1774 if (vp->v_type == VDIR) 1775 error = EPERM; 1776 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1777 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1778 vattr.va_nlink > 1)) { 1779 /* 1780 * Purge the name cache so that the chance of a lookup for 1781 * the name succeeding while the remove is in progress is 1782 * minimized. Without node locking it can still happen, such 1783 * that an I/O op returns ESTALE, but since you get this if 1784 * another host removes the file.. 1785 */ 1786 cache_purge(vp); 1787 /* 1788 * throw away biocache buffers, mainly to avoid 1789 * unnecessary delayed writes later. 1790 */ 1791 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1792 /* Do the rpc */ 1793 if (error != EINTR) 1794 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1795 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1796 } else if (!np->n_sillyrename) 1797 error = nfs_sillyrename(dvp, vp, cnp); 1798 PNBUF_PUT(cnp->cn_pnbuf); 1799 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1800 vattr.va_nlink == 1) { 1801 np->n_flag |= NREMOVED; 1802 } 1803 NFS_INVALIDATE_ATTRCACHE(np); 1804 VN_KNOTE(vp, NOTE_DELETE); 1805 VN_KNOTE(dvp, NOTE_WRITE); 1806 if (dvp == vp) 1807 vrele(vp); 1808 else 1809 vput(vp); 1810 vput(dvp); 1811 return (error); 1812 } 1813 1814 /* 1815 * nfs file remove rpc called from nfs_inactive 1816 */ 1817 int 1818 nfs_removeit(sp) 1819 struct sillyrename *sp; 1820 { 1821 1822 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1823 (struct proc *)0)); 1824 } 1825 1826 /* 1827 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1828 */ 1829 int 1830 nfs_removerpc(dvp, name, namelen, cred, proc) 1831 struct vnode *dvp; 1832 const char *name; 1833 int namelen; 1834 struct ucred *cred; 1835 struct proc *proc; 1836 { 1837 u_int32_t *tl; 1838 caddr_t cp; 1839 int32_t t1, t2; 1840 caddr_t bpos, dpos, cp2; 1841 int error = 0, wccflag = NFSV3_WCCRATTR; 1842 struct mbuf *mreq, *mrep, *md, *mb; 1843 const int v3 = NFS_ISV3(dvp); 1844 int rexmit; 1845 struct nfsnode *dnp = VTONFS(dvp); 1846 1847 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1848 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1849 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1850 nfsm_fhtom(dnp, v3); 1851 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1852 nfsm_request1(dnp, NFSPROC_REMOVE, proc, cred, &rexmit); 1853 if (v3) 1854 nfsm_wcc_data(dvp, wccflag, 0); 1855 nfsm_reqdone; 1856 VTONFS(dvp)->n_flag |= NMODIFIED; 1857 if (!wccflag) 1858 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1859 /* 1860 * Kludge City: If the first reply to the remove rpc is lost.. 1861 * the reply to the retransmitted request will be ENOENT 1862 * since the file was in fact removed 1863 * Therefore, we cheat and return success. 1864 */ 1865 if (rexmit && error == ENOENT) 1866 error = 0; 1867 return (error); 1868 } 1869 1870 /* 1871 * nfs file rename call 1872 */ 1873 int 1874 nfs_rename(v) 1875 void *v; 1876 { 1877 struct vop_rename_args /* { 1878 struct vnode *a_fdvp; 1879 struct vnode *a_fvp; 1880 struct componentname *a_fcnp; 1881 struct vnode *a_tdvp; 1882 struct vnode *a_tvp; 1883 struct componentname *a_tcnp; 1884 } */ *ap = v; 1885 struct vnode *fvp = ap->a_fvp; 1886 struct vnode *tvp = ap->a_tvp; 1887 struct vnode *fdvp = ap->a_fdvp; 1888 struct vnode *tdvp = ap->a_tdvp; 1889 struct componentname *tcnp = ap->a_tcnp; 1890 struct componentname *fcnp = ap->a_fcnp; 1891 int error; 1892 1893 #ifndef DIAGNOSTIC 1894 if ((tcnp->cn_flags & HASBUF) == 0 || 1895 (fcnp->cn_flags & HASBUF) == 0) 1896 panic("nfs_rename: no name"); 1897 #endif 1898 /* Check for cross-device rename */ 1899 if ((fvp->v_mount != tdvp->v_mount) || 1900 (tvp && (fvp->v_mount != tvp->v_mount))) { 1901 error = EXDEV; 1902 goto out; 1903 } 1904 1905 /* 1906 * If the tvp exists and is in use, sillyrename it before doing the 1907 * rename of the new file over it. 1908 */ 1909 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1910 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1911 VN_KNOTE(tvp, NOTE_DELETE); 1912 vput(tvp); 1913 tvp = NULL; 1914 } 1915 1916 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1917 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1918 tcnp->cn_proc); 1919 1920 VN_KNOTE(fdvp, NOTE_WRITE); 1921 VN_KNOTE(tdvp, NOTE_WRITE); 1922 if (fvp->v_type == VDIR) { 1923 if (tvp != NULL && tvp->v_type == VDIR) 1924 cache_purge(tdvp); 1925 cache_purge(fdvp); 1926 } 1927 out: 1928 if (tdvp == tvp) 1929 vrele(tdvp); 1930 else 1931 vput(tdvp); 1932 if (tvp) 1933 vput(tvp); 1934 vrele(fdvp); 1935 vrele(fvp); 1936 return (error); 1937 } 1938 1939 /* 1940 * nfs file rename rpc called from nfs_remove() above 1941 */ 1942 int 1943 nfs_renameit(sdvp, scnp, sp) 1944 struct vnode *sdvp; 1945 struct componentname *scnp; 1946 struct sillyrename *sp; 1947 { 1948 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1949 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1950 } 1951 1952 /* 1953 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1954 */ 1955 int 1956 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1957 struct vnode *fdvp; 1958 const char *fnameptr; 1959 int fnamelen; 1960 struct vnode *tdvp; 1961 const char *tnameptr; 1962 int tnamelen; 1963 struct ucred *cred; 1964 struct proc *proc; 1965 { 1966 u_int32_t *tl; 1967 caddr_t cp; 1968 int32_t t1, t2; 1969 caddr_t bpos, dpos, cp2; 1970 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1971 struct mbuf *mreq, *mrep, *md, *mb; 1972 const int v3 = NFS_ISV3(fdvp); 1973 int rexmit; 1974 struct nfsnode *fdnp = VTONFS(fdvp); 1975 1976 nfsstats.rpccnt[NFSPROC_RENAME]++; 1977 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1978 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1979 nfsm_rndup(tnamelen)); 1980 nfsm_fhtom(fdnp, v3); 1981 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1982 nfsm_fhtom(VTONFS(tdvp), v3); 1983 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1984 nfsm_request1(fdnp, NFSPROC_RENAME, proc, cred, &rexmit); 1985 if (v3) { 1986 nfsm_wcc_data(fdvp, fwccflag, 0); 1987 nfsm_wcc_data(tdvp, twccflag, 0); 1988 } 1989 nfsm_reqdone; 1990 VTONFS(fdvp)->n_flag |= NMODIFIED; 1991 VTONFS(tdvp)->n_flag |= NMODIFIED; 1992 if (!fwccflag) 1993 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 1994 if (!twccflag) 1995 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 1996 /* 1997 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1998 */ 1999 if (rexmit && error == ENOENT) 2000 error = 0; 2001 return (error); 2002 } 2003 2004 /* 2005 * nfs hard link create call 2006 */ 2007 int 2008 nfs_link(v) 2009 void *v; 2010 { 2011 struct vop_link_args /* { 2012 struct vnode *a_dvp; 2013 struct vnode *a_vp; 2014 struct componentname *a_cnp; 2015 } */ *ap = v; 2016 struct vnode *vp = ap->a_vp; 2017 struct vnode *dvp = ap->a_dvp; 2018 struct componentname *cnp = ap->a_cnp; 2019 u_int32_t *tl; 2020 caddr_t cp; 2021 int32_t t1, t2; 2022 caddr_t bpos, dpos, cp2; 2023 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2024 struct mbuf *mreq, *mrep, *md, *mb; 2025 /* XXX Should be const and initialised? */ 2026 int v3; 2027 int rexmit; 2028 struct nfsnode *np; 2029 2030 if (dvp->v_mount != vp->v_mount) { 2031 VOP_ABORTOP(dvp, cnp); 2032 vput(dvp); 2033 return (EXDEV); 2034 } 2035 if (dvp != vp) { 2036 error = vn_lock(vp, LK_EXCLUSIVE); 2037 if (error != 0) { 2038 VOP_ABORTOP(dvp, cnp); 2039 vput(dvp); 2040 return error; 2041 } 2042 } 2043 2044 /* 2045 * Push all writes to the server, so that the attribute cache 2046 * doesn't get "out of sync" with the server. 2047 * XXX There should be a better way! 2048 */ 2049 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 2050 2051 v3 = NFS_ISV3(vp); 2052 nfsstats.rpccnt[NFSPROC_LINK]++; 2053 np = VTONFS(vp); 2054 nfsm_reqhead(np, NFSPROC_LINK, 2055 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2056 nfsm_fhtom(np, v3); 2057 nfsm_fhtom(VTONFS(dvp), v3); 2058 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2059 nfsm_request1(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred, &rexmit); 2060 if (v3) { 2061 nfsm_postop_attr(vp, attrflag, 0); 2062 nfsm_wcc_data(dvp, wccflag, 0); 2063 } 2064 nfsm_reqdone; 2065 PNBUF_PUT(cnp->cn_pnbuf); 2066 VTONFS(dvp)->n_flag |= NMODIFIED; 2067 if (!attrflag) 2068 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2069 if (!wccflag) 2070 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2071 if (dvp != vp) 2072 VOP_UNLOCK(vp, 0); 2073 VN_KNOTE(vp, NOTE_LINK); 2074 VN_KNOTE(dvp, NOTE_WRITE); 2075 vput(dvp); 2076 /* 2077 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2078 */ 2079 if (rexmit && error == EEXIST) 2080 error = 0; 2081 return (error); 2082 } 2083 2084 /* 2085 * nfs symbolic link create call 2086 */ 2087 int 2088 nfs_symlink(v) 2089 void *v; 2090 { 2091 struct vop_symlink_args /* { 2092 struct vnode *a_dvp; 2093 struct vnode **a_vpp; 2094 struct componentname *a_cnp; 2095 struct vattr *a_vap; 2096 char *a_target; 2097 } */ *ap = v; 2098 struct vnode *dvp = ap->a_dvp; 2099 struct vattr *vap = ap->a_vap; 2100 struct componentname *cnp = ap->a_cnp; 2101 struct nfsv2_sattr *sp; 2102 u_int32_t *tl; 2103 caddr_t cp; 2104 int32_t t1, t2; 2105 caddr_t bpos, dpos, cp2; 2106 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2107 struct mbuf *mreq, *mrep, *md, *mb; 2108 struct vnode *newvp = (struct vnode *)0; 2109 const int v3 = NFS_ISV3(dvp); 2110 int rexmit; 2111 struct nfsnode *dnp = VTONFS(dvp); 2112 2113 *ap->a_vpp = NULL; 2114 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2115 slen = strlen(ap->a_target); 2116 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2117 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2118 nfsm_fhtom(dnp, v3); 2119 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2120 if (v3) 2121 nfsm_v3attrbuild(vap, FALSE); 2122 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2123 if (!v3) { 2124 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2125 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2126 sp->sa_uid = nfs_xdrneg1; 2127 sp->sa_gid = nfs_xdrneg1; 2128 sp->sa_size = nfs_xdrneg1; 2129 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2130 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2131 } 2132 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred, 2133 &rexmit); 2134 if (v3) { 2135 if (!error) 2136 nfsm_mtofh(dvp, newvp, v3, gotvp); 2137 nfsm_wcc_data(dvp, wccflag, 0); 2138 } 2139 nfsm_reqdone; 2140 /* 2141 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2142 */ 2143 if (rexmit && error == EEXIST) 2144 error = 0; 2145 if (error == 0 && newvp == NULL) { 2146 struct nfsnode *np = NULL; 2147 2148 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2149 cnp->cn_cred, cnp->cn_proc, &np); 2150 if (error == 0) 2151 newvp = NFSTOV(np); 2152 } 2153 if (error) { 2154 if (newvp != NULL) 2155 vput(newvp); 2156 } else { 2157 *ap->a_vpp = newvp; 2158 } 2159 PNBUF_PUT(cnp->cn_pnbuf); 2160 VTONFS(dvp)->n_flag |= NMODIFIED; 2161 if (!wccflag) 2162 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2163 VN_KNOTE(dvp, NOTE_WRITE); 2164 vput(dvp); 2165 return (error); 2166 } 2167 2168 /* 2169 * nfs make dir call 2170 */ 2171 int 2172 nfs_mkdir(v) 2173 void *v; 2174 { 2175 struct vop_mkdir_args /* { 2176 struct vnode *a_dvp; 2177 struct vnode **a_vpp; 2178 struct componentname *a_cnp; 2179 struct vattr *a_vap; 2180 } */ *ap = v; 2181 struct vnode *dvp = ap->a_dvp; 2182 struct vattr *vap = ap->a_vap; 2183 struct componentname *cnp = ap->a_cnp; 2184 struct nfsv2_sattr *sp; 2185 u_int32_t *tl; 2186 caddr_t cp; 2187 int32_t t1, t2; 2188 int len; 2189 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2190 struct vnode *newvp = (struct vnode *)0; 2191 caddr_t bpos, dpos, cp2; 2192 int error = 0, wccflag = NFSV3_WCCRATTR; 2193 int gotvp = 0; 2194 int rexmit; 2195 struct mbuf *mreq, *mrep, *md, *mb; 2196 const int v3 = NFS_ISV3(dvp); 2197 2198 len = cnp->cn_namelen; 2199 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2200 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2201 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2202 nfsm_fhtom(dnp, v3); 2203 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2204 if (v3) { 2205 nfsm_v3attrbuild(vap, FALSE); 2206 } else { 2207 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2208 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2209 sp->sa_uid = nfs_xdrneg1; 2210 sp->sa_gid = nfs_xdrneg1; 2211 sp->sa_size = nfs_xdrneg1; 2212 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2213 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2214 } 2215 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2216 if (!error) 2217 nfsm_mtofh(dvp, newvp, v3, gotvp); 2218 if (v3) 2219 nfsm_wcc_data(dvp, wccflag, 0); 2220 nfsm_reqdone; 2221 VTONFS(dvp)->n_flag |= NMODIFIED; 2222 if (!wccflag) 2223 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2224 /* 2225 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2226 * if we can succeed in looking up the directory. 2227 */ 2228 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2229 if (newvp) { 2230 vput(newvp); 2231 newvp = (struct vnode *)0; 2232 } 2233 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2234 cnp->cn_proc, &np); 2235 if (!error) { 2236 newvp = NFSTOV(np); 2237 if (newvp->v_type != VDIR) 2238 error = EEXIST; 2239 } 2240 } 2241 if (error) { 2242 if (newvp) 2243 vput(newvp); 2244 } else { 2245 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2246 if (cnp->cn_flags & MAKEENTRY) 2247 nfs_cache_enter(dvp, newvp, cnp); 2248 *ap->a_vpp = newvp; 2249 } 2250 PNBUF_PUT(cnp->cn_pnbuf); 2251 vput(dvp); 2252 return (error); 2253 } 2254 2255 /* 2256 * nfs remove directory call 2257 */ 2258 int 2259 nfs_rmdir(v) 2260 void *v; 2261 { 2262 struct vop_rmdir_args /* { 2263 struct vnode *a_dvp; 2264 struct vnode *a_vp; 2265 struct componentname *a_cnp; 2266 } */ *ap = v; 2267 struct vnode *vp = ap->a_vp; 2268 struct vnode *dvp = ap->a_dvp; 2269 struct componentname *cnp = ap->a_cnp; 2270 u_int32_t *tl; 2271 caddr_t cp; 2272 int32_t t1, t2; 2273 caddr_t bpos, dpos, cp2; 2274 int error = 0, wccflag = NFSV3_WCCRATTR; 2275 int rexmit; 2276 struct mbuf *mreq, *mrep, *md, *mb; 2277 const int v3 = NFS_ISV3(dvp); 2278 struct nfsnode *dnp; 2279 2280 if (dvp == vp) { 2281 vrele(dvp); 2282 vput(dvp); 2283 PNBUF_PUT(cnp->cn_pnbuf); 2284 return (EINVAL); 2285 } 2286 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2287 dnp = VTONFS(dvp); 2288 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2289 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2290 nfsm_fhtom(dnp, v3); 2291 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2292 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2293 if (v3) 2294 nfsm_wcc_data(dvp, wccflag, 0); 2295 nfsm_reqdone; 2296 PNBUF_PUT(cnp->cn_pnbuf); 2297 VTONFS(dvp)->n_flag |= NMODIFIED; 2298 if (!wccflag) 2299 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2300 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2301 VN_KNOTE(vp, NOTE_DELETE); 2302 cache_purge(vp); 2303 vput(vp); 2304 vput(dvp); 2305 /* 2306 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2307 */ 2308 if (rexmit && error == ENOENT) 2309 error = 0; 2310 return (error); 2311 } 2312 2313 /* 2314 * nfs readdir call 2315 */ 2316 int 2317 nfs_readdir(v) 2318 void *v; 2319 { 2320 struct vop_readdir_args /* { 2321 struct vnode *a_vp; 2322 struct uio *a_uio; 2323 struct ucred *a_cred; 2324 int *a_eofflag; 2325 off_t **a_cookies; 2326 int *a_ncookies; 2327 } */ *ap = v; 2328 struct vnode *vp = ap->a_vp; 2329 struct uio *uio = ap->a_uio; 2330 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2331 char *base = uio->uio_iov->iov_base; 2332 int tresid, error; 2333 size_t count, lost; 2334 struct dirent *dp; 2335 off_t *cookies = NULL; 2336 int ncookies = 0, nc; 2337 2338 if (vp->v_type != VDIR) 2339 return (EPERM); 2340 2341 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2342 count = uio->uio_resid - lost; 2343 if (count <= 0) 2344 return (EINVAL); 2345 2346 /* 2347 * Call nfs_bioread() to do the real work. 2348 */ 2349 tresid = uio->uio_resid = count; 2350 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2351 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2352 2353 if (!error && ap->a_cookies) { 2354 ncookies = count / 16; 2355 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2356 *ap->a_cookies = cookies; 2357 } 2358 2359 if (!error && uio->uio_resid == tresid) { 2360 uio->uio_resid += lost; 2361 nfsstats.direofcache_misses++; 2362 if (ap->a_cookies) 2363 *ap->a_ncookies = 0; 2364 *ap->a_eofflag = 1; 2365 return (0); 2366 } 2367 2368 if (!error && ap->a_cookies) { 2369 /* 2370 * Only the NFS server and emulations use cookies, and they 2371 * load the directory block into system space, so we can 2372 * just look at it directly. 2373 */ 2374 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2375 panic("nfs_readdir: lost in space"); 2376 for (nc = 0; ncookies-- && 2377 base < (char *)uio->uio_iov->iov_base; nc++){ 2378 dp = (struct dirent *) base; 2379 if (dp->d_reclen == 0) 2380 break; 2381 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2382 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2383 else 2384 *(cookies++) = NFS_GETCOOKIE(dp); 2385 base += dp->d_reclen; 2386 } 2387 uio->uio_resid += 2388 ((caddr_t)uio->uio_iov->iov_base - base); 2389 uio->uio_iov->iov_len += 2390 ((caddr_t)uio->uio_iov->iov_base - base); 2391 uio->uio_iov->iov_base = base; 2392 *ap->a_ncookies = nc; 2393 } 2394 2395 uio->uio_resid += lost; 2396 *ap->a_eofflag = 0; 2397 return (error); 2398 } 2399 2400 /* 2401 * Readdir rpc call. 2402 * Called from below the buffer cache by nfs_doio(). 2403 */ 2404 int 2405 nfs_readdirrpc(vp, uiop, cred) 2406 struct vnode *vp; 2407 struct uio *uiop; 2408 struct ucred *cred; 2409 { 2410 int len, left; 2411 struct dirent *dp = NULL; 2412 u_int32_t *tl; 2413 caddr_t cp; 2414 int32_t t1, t2; 2415 caddr_t bpos, dpos, cp2; 2416 struct mbuf *mreq, *mrep, *md, *mb; 2417 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2418 struct nfsnode *dnp = VTONFS(vp); 2419 u_quad_t fileno; 2420 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2421 int attrflag, nrpcs = 0, reclen; 2422 const int v3 = NFS_ISV3(vp); 2423 2424 #ifdef DIAGNOSTIC 2425 /* 2426 * Should be called from buffer cache, so only amount of 2427 * NFS_DIRBLKSIZ will be requested. 2428 */ 2429 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2430 panic("nfs readdirrpc bad uio"); 2431 #endif 2432 2433 /* 2434 * Loop around doing readdir rpc's of size nm_readdirsize 2435 * truncated to a multiple of NFS_DIRFRAGSIZ. 2436 * The stopping criteria is EOF or buffer full. 2437 */ 2438 while (more_dirs && bigenough) { 2439 /* 2440 * Heuristic: don't bother to do another RPC to further 2441 * fill up this block if there is not much room left. (< 50% 2442 * of the readdir RPC size). This wastes some buffer space 2443 * but can save up to 50% in RPC calls. 2444 */ 2445 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2446 bigenough = 0; 2447 break; 2448 } 2449 nfsstats.rpccnt[NFSPROC_READDIR]++; 2450 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2451 NFSX_READDIR(v3)); 2452 nfsm_fhtom(dnp, v3); 2453 if (v3) { 2454 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2455 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2456 txdr_swapcookie3(uiop->uio_offset, tl); 2457 } else { 2458 txdr_cookie3(uiop->uio_offset, tl); 2459 } 2460 tl += 2; 2461 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2462 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2463 } else { 2464 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2465 *tl++ = txdr_unsigned(uiop->uio_offset); 2466 } 2467 *tl = txdr_unsigned(nmp->nm_readdirsize); 2468 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2469 nrpcs++; 2470 if (v3) { 2471 nfsm_postop_attr(vp, attrflag, 0); 2472 if (!error) { 2473 nfsm_dissect(tl, u_int32_t *, 2474 2 * NFSX_UNSIGNED); 2475 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2476 dnp->n_cookieverf.nfsuquad[1] = *tl; 2477 } else { 2478 m_freem(mrep); 2479 goto nfsmout; 2480 } 2481 } 2482 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2483 more_dirs = fxdr_unsigned(int, *tl); 2484 2485 /* loop thru the dir entries, doctoring them to 4bsd form */ 2486 while (more_dirs && bigenough) { 2487 if (v3) { 2488 nfsm_dissect(tl, u_int32_t *, 2489 3 * NFSX_UNSIGNED); 2490 fileno = fxdr_hyper(tl); 2491 len = fxdr_unsigned(int, *(tl + 2)); 2492 } else { 2493 nfsm_dissect(tl, u_int32_t *, 2494 2 * NFSX_UNSIGNED); 2495 fileno = fxdr_unsigned(u_quad_t, *tl++); 2496 len = fxdr_unsigned(int, *tl); 2497 } 2498 if (len <= 0 || len > NFS_MAXNAMLEN) { 2499 error = EBADRPC; 2500 m_freem(mrep); 2501 goto nfsmout; 2502 } 2503 tlen = nfsm_rndup(len); 2504 if (tlen == len) 2505 tlen += 4; /* To ensure null termination */ 2506 tlen += sizeof (off_t) + sizeof (int); 2507 reclen = ALIGN(tlen + DIRHDSIZ); 2508 tlen = reclen - DIRHDSIZ; 2509 left = NFS_DIRFRAGSIZ - blksiz; 2510 if (reclen > left) { 2511 dp->d_reclen += left; 2512 uiop->uio_iov->iov_base = 2513 (caddr_t)uiop->uio_iov->iov_base + left; 2514 uiop->uio_iov->iov_len -= left; 2515 uiop->uio_resid -= left; 2516 blksiz = 0; 2517 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2518 } 2519 if (reclen > uiop->uio_resid) 2520 bigenough = 0; 2521 if (bigenough) { 2522 dp = (struct dirent *)uiop->uio_iov->iov_base; 2523 dp->d_fileno = (int)fileno; 2524 dp->d_namlen = len; 2525 dp->d_reclen = reclen; 2526 dp->d_type = DT_UNKNOWN; 2527 blksiz += dp->d_reclen; 2528 if (blksiz == NFS_DIRFRAGSIZ) 2529 blksiz = 0; 2530 uiop->uio_resid -= DIRHDSIZ; 2531 uiop->uio_iov->iov_base = 2532 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2533 uiop->uio_iov->iov_len -= DIRHDSIZ; 2534 nfsm_mtouio(uiop, len); 2535 cp = uiop->uio_iov->iov_base; 2536 tlen -= len; 2537 *cp = '\0'; /* null terminate */ 2538 uiop->uio_iov->iov_base = 2539 (caddr_t)uiop->uio_iov->iov_base + tlen; 2540 uiop->uio_iov->iov_len -= tlen; 2541 uiop->uio_resid -= tlen; 2542 } else 2543 nfsm_adv(nfsm_rndup(len)); 2544 if (v3) { 2545 nfsm_dissect(tl, u_int32_t *, 2546 3 * NFSX_UNSIGNED); 2547 } else { 2548 nfsm_dissect(tl, u_int32_t *, 2549 2 * NFSX_UNSIGNED); 2550 } 2551 if (bigenough) { 2552 if (v3) { 2553 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2554 uiop->uio_offset = 2555 fxdr_swapcookie3(tl); 2556 else 2557 uiop->uio_offset = 2558 fxdr_cookie3(tl); 2559 } 2560 else { 2561 uiop->uio_offset = 2562 fxdr_unsigned(off_t, *tl); 2563 } 2564 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2565 } 2566 if (v3) 2567 tl += 2; 2568 else 2569 tl++; 2570 more_dirs = fxdr_unsigned(int, *tl); 2571 } 2572 /* 2573 * If at end of rpc data, get the eof boolean 2574 */ 2575 if (!more_dirs) { 2576 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2577 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2578 2579 /* 2580 * kludge: if we got no entries, treat it as EOF. 2581 * some server sometimes send a reply without any 2582 * entries or EOF. 2583 * although it might mean the server has very long name, 2584 * we can't handle such entries anyway. 2585 */ 2586 2587 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2588 more_dirs = 0; 2589 } 2590 m_freem(mrep); 2591 } 2592 /* 2593 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2594 * by increasing d_reclen for the last record. 2595 */ 2596 if (blksiz > 0) { 2597 left = NFS_DIRFRAGSIZ - blksiz; 2598 dp->d_reclen += left; 2599 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2600 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2601 left; 2602 uiop->uio_iov->iov_len -= left; 2603 uiop->uio_resid -= left; 2604 } 2605 2606 /* 2607 * We are now either at the end of the directory or have filled the 2608 * block. 2609 */ 2610 if (bigenough) 2611 dnp->n_direofoffset = uiop->uio_offset; 2612 nfsmout: 2613 return (error); 2614 } 2615 2616 /* 2617 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2618 */ 2619 int 2620 nfs_readdirplusrpc(vp, uiop, cred) 2621 struct vnode *vp; 2622 struct uio *uiop; 2623 struct ucred *cred; 2624 { 2625 int len, left; 2626 struct dirent *dp = NULL; 2627 u_int32_t *tl; 2628 caddr_t cp; 2629 int32_t t1, t2; 2630 struct vnode *newvp; 2631 caddr_t bpos, dpos, cp2; 2632 struct mbuf *mreq, *mrep, *md, *mb; 2633 struct nameidata nami, *ndp = &nami; 2634 struct componentname *cnp = &ndp->ni_cnd; 2635 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2636 struct nfsnode *dnp = VTONFS(vp), *np; 2637 nfsfh_t *fhp; 2638 u_quad_t fileno; 2639 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2640 int attrflag, fhsize, nrpcs = 0, reclen; 2641 struct nfs_fattr fattr, *fp; 2642 2643 #ifdef DIAGNOSTIC 2644 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2645 panic("nfs readdirplusrpc bad uio"); 2646 #endif 2647 ndp->ni_dvp = vp; 2648 newvp = NULLVP; 2649 2650 /* 2651 * Loop around doing readdir rpc's of size nm_readdirsize 2652 * truncated to a multiple of NFS_DIRFRAGSIZ. 2653 * The stopping criteria is EOF or buffer full. 2654 */ 2655 while (more_dirs && bigenough) { 2656 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2657 bigenough = 0; 2658 break; 2659 } 2660 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2661 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2662 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2663 nfsm_fhtom(dnp, 1); 2664 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2665 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2666 txdr_swapcookie3(uiop->uio_offset, tl); 2667 } else { 2668 txdr_cookie3(uiop->uio_offset, tl); 2669 } 2670 tl += 2; 2671 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2672 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2673 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2674 *tl = txdr_unsigned(nmp->nm_rsize); 2675 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2676 nfsm_postop_attr(vp, attrflag, 0); 2677 if (error) { 2678 m_freem(mrep); 2679 goto nfsmout; 2680 } 2681 nrpcs++; 2682 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2683 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2684 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2685 more_dirs = fxdr_unsigned(int, *tl); 2686 2687 /* loop thru the dir entries, doctoring them to 4bsd form */ 2688 while (more_dirs && bigenough) { 2689 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2690 fileno = fxdr_hyper(tl); 2691 len = fxdr_unsigned(int, *(tl + 2)); 2692 if (len <= 0 || len > NFS_MAXNAMLEN) { 2693 error = EBADRPC; 2694 m_freem(mrep); 2695 goto nfsmout; 2696 } 2697 tlen = nfsm_rndup(len); 2698 if (tlen == len) 2699 tlen += 4; /* To ensure null termination*/ 2700 tlen += sizeof (off_t) + sizeof (int); 2701 reclen = ALIGN(tlen + DIRHDSIZ); 2702 tlen = reclen - DIRHDSIZ; 2703 left = NFS_DIRFRAGSIZ - blksiz; 2704 if (reclen > left) { 2705 /* 2706 * DIRFRAGSIZ is aligned, no need to align 2707 * again here. 2708 */ 2709 dp->d_reclen += left; 2710 uiop->uio_iov->iov_base = 2711 (caddr_t)uiop->uio_iov->iov_base + left; 2712 uiop->uio_iov->iov_len -= left; 2713 uiop->uio_resid -= left; 2714 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2715 blksiz = 0; 2716 } 2717 if (reclen > uiop->uio_resid) 2718 bigenough = 0; 2719 if (bigenough) { 2720 dp = (struct dirent *)uiop->uio_iov->iov_base; 2721 dp->d_fileno = (int)fileno; 2722 dp->d_namlen = len; 2723 dp->d_reclen = reclen; 2724 dp->d_type = DT_UNKNOWN; 2725 blksiz += dp->d_reclen; 2726 if (blksiz == NFS_DIRFRAGSIZ) 2727 blksiz = 0; 2728 uiop->uio_resid -= DIRHDSIZ; 2729 uiop->uio_iov->iov_base = 2730 (caddr_t)uiop->uio_iov->iov_base + 2731 DIRHDSIZ; 2732 uiop->uio_iov->iov_len -= DIRHDSIZ; 2733 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2734 cnp->cn_namelen = len; 2735 nfsm_mtouio(uiop, len); 2736 cp = uiop->uio_iov->iov_base; 2737 tlen -= len; 2738 *cp = '\0'; 2739 uiop->uio_iov->iov_base = 2740 (caddr_t)uiop->uio_iov->iov_base + tlen; 2741 uiop->uio_iov->iov_len -= tlen; 2742 uiop->uio_resid -= tlen; 2743 } else 2744 nfsm_adv(nfsm_rndup(len)); 2745 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2746 if (bigenough) { 2747 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2748 uiop->uio_offset = 2749 fxdr_swapcookie3(tl); 2750 else 2751 uiop->uio_offset = 2752 fxdr_cookie3(tl); 2753 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2754 } 2755 tl += 2; 2756 2757 /* 2758 * Since the attributes are before the file handle 2759 * (sigh), we must skip over the attributes and then 2760 * come back and get them. 2761 */ 2762 attrflag = fxdr_unsigned(int, *tl); 2763 if (attrflag) { 2764 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2765 memcpy(&fattr, fp, NFSX_V3FATTR); 2766 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2767 doit = fxdr_unsigned(int, *tl); 2768 if (doit) { 2769 nfsm_getfh(fhp, fhsize, 1); 2770 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2771 VREF(vp); 2772 newvp = vp; 2773 np = dnp; 2774 } else { 2775 error = nfs_nget1(vp->v_mount, fhp, 2776 fhsize, &np, LK_NOWAIT); 2777 if (!error) 2778 newvp = NFSTOV(np); 2779 } 2780 if (!error) { 2781 const char *cp; 2782 2783 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2784 dp->d_type = 2785 IFTODT(VTTOIF(np->n_vattr->va_type)); 2786 ndp->ni_vp = newvp; 2787 cp = cnp->cn_nameptr + cnp->cn_namelen; 2788 cnp->cn_hash = 2789 namei_hash(cnp->cn_nameptr, &cp); 2790 if (cnp->cn_namelen <= NCHNAMLEN) { 2791 cache_purge1(ndp->ni_dvp, cnp, 0); 2792 nfs_cache_enter(ndp->ni_dvp, ndp->ni_vp, 2793 cnp); 2794 } 2795 } 2796 } 2797 } else { 2798 /* Just skip over the file handle */ 2799 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2800 i = fxdr_unsigned(int, *tl); 2801 nfsm_adv(nfsm_rndup(i)); 2802 } 2803 if (newvp != NULLVP) { 2804 if (newvp == vp) 2805 vrele(newvp); 2806 else 2807 vput(newvp); 2808 newvp = NULLVP; 2809 } 2810 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2811 more_dirs = fxdr_unsigned(int, *tl); 2812 } 2813 /* 2814 * If at end of rpc data, get the eof boolean 2815 */ 2816 if (!more_dirs) { 2817 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2818 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2819 2820 /* 2821 * kludge: see a comment in nfs_readdirrpc. 2822 */ 2823 2824 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2825 more_dirs = 0; 2826 } 2827 m_freem(mrep); 2828 } 2829 /* 2830 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2831 * by increasing d_reclen for the last record. 2832 */ 2833 if (blksiz > 0) { 2834 left = NFS_DIRFRAGSIZ - blksiz; 2835 dp->d_reclen += left; 2836 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2837 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2838 left; 2839 uiop->uio_iov->iov_len -= left; 2840 uiop->uio_resid -= left; 2841 } 2842 2843 /* 2844 * We are now either at the end of the directory or have filled the 2845 * block. 2846 */ 2847 if (bigenough) 2848 dnp->n_direofoffset = uiop->uio_offset; 2849 nfsmout: 2850 if (newvp != NULLVP) { 2851 if(newvp == vp) 2852 vrele(newvp); 2853 else 2854 vput(newvp); 2855 } 2856 return (error); 2857 } 2858 static char hextoasc[] = "0123456789abcdef"; 2859 2860 /* 2861 * Silly rename. To make the NFS filesystem that is stateless look a little 2862 * more like the "ufs" a remove of an active vnode is translated to a rename 2863 * to a funny looking filename that is removed by nfs_inactive on the 2864 * nfsnode. There is the potential for another process on a different client 2865 * to create the same funny name between the nfs_lookitup() fails and the 2866 * nfs_rename() completes, but... 2867 */ 2868 int 2869 nfs_sillyrename(dvp, vp, cnp) 2870 struct vnode *dvp, *vp; 2871 struct componentname *cnp; 2872 { 2873 struct sillyrename *sp; 2874 struct nfsnode *np; 2875 int error; 2876 short pid; 2877 2878 cache_purge(dvp); 2879 np = VTONFS(vp); 2880 #ifndef DIAGNOSTIC 2881 if (vp->v_type == VDIR) 2882 panic("nfs: sillyrename dir"); 2883 #endif 2884 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2885 M_NFSREQ, M_WAITOK); 2886 sp->s_cred = crdup(cnp->cn_cred); 2887 sp->s_dvp = dvp; 2888 VREF(dvp); 2889 2890 /* Fudge together a funny name */ 2891 pid = cnp->cn_proc->p_pid; 2892 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2893 sp->s_namlen = 12; 2894 sp->s_name[8] = hextoasc[pid & 0xf]; 2895 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2896 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2897 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2898 2899 /* Try lookitups until we get one that isn't there */ 2900 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2901 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2902 sp->s_name[4]++; 2903 if (sp->s_name[4] > 'z') { 2904 error = EINVAL; 2905 goto bad; 2906 } 2907 } 2908 error = nfs_renameit(dvp, cnp, sp); 2909 if (error) 2910 goto bad; 2911 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2912 cnp->cn_proc, &np); 2913 np->n_sillyrename = sp; 2914 return (0); 2915 bad: 2916 vrele(sp->s_dvp); 2917 crfree(sp->s_cred); 2918 free((caddr_t)sp, M_NFSREQ); 2919 return (error); 2920 } 2921 2922 /* 2923 * Look up a file name and optionally either update the file handle or 2924 * allocate an nfsnode, depending on the value of npp. 2925 * npp == NULL --> just do the lookup 2926 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2927 * handled too 2928 * *npp != NULL --> update the file handle in the vnode 2929 */ 2930 int 2931 nfs_lookitup(dvp, name, len, cred, procp, npp) 2932 struct vnode *dvp; 2933 const char *name; 2934 int len; 2935 struct ucred *cred; 2936 struct proc *procp; 2937 struct nfsnode **npp; 2938 { 2939 u_int32_t *tl; 2940 caddr_t cp; 2941 int32_t t1, t2; 2942 struct vnode *newvp = (struct vnode *)0; 2943 struct nfsnode *np, *dnp = VTONFS(dvp); 2944 caddr_t bpos, dpos, cp2; 2945 int error = 0, fhlen, attrflag; 2946 struct mbuf *mreq, *mrep, *md, *mb; 2947 nfsfh_t *nfhp; 2948 const int v3 = NFS_ISV3(dvp); 2949 2950 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2951 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2952 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2953 nfsm_fhtom(dnp, v3); 2954 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2955 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2956 if (npp && !error) { 2957 nfsm_getfh(nfhp, fhlen, v3); 2958 if (*npp) { 2959 np = *npp; 2960 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2961 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2962 np->n_fhp = &np->n_fh; 2963 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2964 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2965 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2966 np->n_fhsize = fhlen; 2967 newvp = NFSTOV(np); 2968 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2969 VREF(dvp); 2970 newvp = dvp; 2971 } else { 2972 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2973 if (error) { 2974 m_freem(mrep); 2975 return (error); 2976 } 2977 newvp = NFSTOV(np); 2978 } 2979 if (v3) { 2980 nfsm_postop_attr(newvp, attrflag, 0); 2981 if (!attrflag && *npp == NULL) { 2982 m_freem(mrep); 2983 vput(newvp); 2984 return (ENOENT); 2985 } 2986 } else 2987 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2988 } 2989 nfsm_reqdone; 2990 if (npp && *npp == NULL) { 2991 if (error) { 2992 if (newvp) 2993 vput(newvp); 2994 } else 2995 *npp = np; 2996 } 2997 return (error); 2998 } 2999 3000 /* 3001 * Nfs Version 3 commit rpc 3002 */ 3003 int 3004 nfs_commit(vp, offset, cnt, procp) 3005 struct vnode *vp; 3006 off_t offset; 3007 uint32_t cnt; 3008 struct proc *procp; 3009 { 3010 caddr_t cp; 3011 u_int32_t *tl; 3012 int32_t t1, t2; 3013 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3014 caddr_t bpos, dpos, cp2; 3015 int error = 0, wccflag = NFSV3_WCCRATTR; 3016 struct mbuf *mreq, *mrep, *md, *mb; 3017 struct nfsnode *np; 3018 3019 KASSERT(NFS_ISV3(vp)); 3020 3021 #ifdef NFS_DEBUG_COMMIT 3022 printf("commit %lu - %lu\n", (unsigned long)offset, 3023 (unsigned long)(offset + cnt)); 3024 #endif 3025 3026 simple_lock(&nmp->nm_slock); 3027 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3028 simple_unlock(&nmp->nm_slock); 3029 return (0); 3030 } 3031 simple_unlock(&nmp->nm_slock); 3032 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3033 np = VTONFS(vp); 3034 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3035 nfsm_fhtom(np, 1); 3036 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3037 txdr_hyper(offset, tl); 3038 tl += 2; 3039 *tl = txdr_unsigned(cnt); 3040 nfsm_request(np, NFSPROC_COMMIT, procp, np->n_wcred); 3041 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 3042 if (!error) { 3043 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3044 simple_lock(&nmp->nm_slock); 3045 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3046 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3047 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3048 error = NFSERR_STALEWRITEVERF; 3049 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3050 } 3051 simple_unlock(&nmp->nm_slock); 3052 } 3053 nfsm_reqdone; 3054 return (error); 3055 } 3056 3057 /* 3058 * Kludge City.. 3059 * - make nfs_bmap() essentially a no-op that does no translation 3060 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3061 * (Maybe I could use the process's page mapping, but I was concerned that 3062 * Kernel Write might not be enabled and also figured copyout() would do 3063 * a lot more work than memcpy() and also it currently happens in the 3064 * context of the swapper process (2). 3065 */ 3066 int 3067 nfs_bmap(v) 3068 void *v; 3069 { 3070 struct vop_bmap_args /* { 3071 struct vnode *a_vp; 3072 daddr_t a_bn; 3073 struct vnode **a_vpp; 3074 daddr_t *a_bnp; 3075 int *a_runp; 3076 } */ *ap = v; 3077 struct vnode *vp = ap->a_vp; 3078 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3079 3080 if (ap->a_vpp != NULL) 3081 *ap->a_vpp = vp; 3082 if (ap->a_bnp != NULL) 3083 *ap->a_bnp = ap->a_bn << bshift; 3084 if (ap->a_runp != NULL) 3085 *ap->a_runp = 1024 * 1024; /* XXX */ 3086 return (0); 3087 } 3088 3089 /* 3090 * Strategy routine. 3091 * For async requests when nfsiod(s) are running, queue the request by 3092 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3093 * request. 3094 */ 3095 int 3096 nfs_strategy(v) 3097 void *v; 3098 { 3099 struct vop_strategy_args *ap = v; 3100 struct buf *bp = ap->a_bp; 3101 struct proc *p; 3102 int error = 0; 3103 3104 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3105 panic("nfs physio/async"); 3106 if (bp->b_flags & B_ASYNC) 3107 p = NULL; 3108 else 3109 p = curproc; /* XXX */ 3110 3111 /* 3112 * If the op is asynchronous and an i/o daemon is waiting 3113 * queue the request, wake it up and wait for completion 3114 * otherwise just do it ourselves. 3115 */ 3116 3117 if ((bp->b_flags & B_ASYNC) == 0 || 3118 nfs_asyncio(bp)) 3119 error = nfs_doio(bp, p); 3120 return (error); 3121 } 3122 3123 /* 3124 * fsync vnode op. Just call nfs_flush() with commit == 1. 3125 */ 3126 /* ARGSUSED */ 3127 int 3128 nfs_fsync(v) 3129 void *v; 3130 { 3131 struct vop_fsync_args /* { 3132 struct vnodeop_desc *a_desc; 3133 struct vnode * a_vp; 3134 struct ucred * a_cred; 3135 int a_flags; 3136 off_t offlo; 3137 off_t offhi; 3138 struct proc * a_p; 3139 } */ *ap = v; 3140 3141 struct vnode *vp = ap->a_vp; 3142 3143 if (vp->v_type != VREG) 3144 return 0; 3145 3146 return (nfs_flush(vp, ap->a_cred, 3147 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3148 } 3149 3150 /* 3151 * Flush all the data associated with a vnode. 3152 */ 3153 int 3154 nfs_flush(vp, cred, waitfor, p, commit) 3155 struct vnode *vp; 3156 struct ucred *cred; 3157 int waitfor; 3158 struct proc *p; 3159 int commit; 3160 { 3161 struct nfsnode *np = VTONFS(vp); 3162 int error; 3163 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3164 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3165 3166 simple_lock(&vp->v_interlock); 3167 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3168 if (np->n_flag & NWRITEERR) { 3169 error = np->n_error; 3170 np->n_flag &= ~NWRITEERR; 3171 } 3172 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3173 return (error); 3174 } 3175 3176 /* 3177 * Return POSIX pathconf information applicable to nfs. 3178 * 3179 * N.B. The NFS V2 protocol doesn't support this RPC. 3180 */ 3181 /* ARGSUSED */ 3182 int 3183 nfs_pathconf(v) 3184 void *v; 3185 { 3186 struct vop_pathconf_args /* { 3187 struct vnode *a_vp; 3188 int a_name; 3189 register_t *a_retval; 3190 } */ *ap = v; 3191 struct nfsv3_pathconf *pcp; 3192 struct vnode *vp = ap->a_vp; 3193 struct mbuf *mreq, *mrep, *md, *mb; 3194 int32_t t1, t2; 3195 u_int32_t *tl; 3196 caddr_t bpos, dpos, cp, cp2; 3197 int error = 0, attrflag; 3198 #ifndef NFS_V2_ONLY 3199 struct nfsmount *nmp; 3200 unsigned int l; 3201 u_int64_t maxsize; 3202 #endif 3203 const int v3 = NFS_ISV3(vp); 3204 struct nfsnode *np = VTONFS(vp); 3205 3206 switch (ap->a_name) { 3207 /* Names that can be resolved locally. */ 3208 case _PC_PIPE_BUF: 3209 *ap->a_retval = PIPE_BUF; 3210 break; 3211 case _PC_SYNC_IO: 3212 *ap->a_retval = 1; 3213 break; 3214 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3215 case _PC_LINK_MAX: 3216 case _PC_NAME_MAX: 3217 case _PC_CHOWN_RESTRICTED: 3218 case _PC_NO_TRUNC: 3219 if (!v3) { 3220 error = EINVAL; 3221 break; 3222 } 3223 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3224 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3225 nfsm_fhtom(np, 1); 3226 nfsm_request(np, NFSPROC_PATHCONF, 3227 curproc, curproc->p_ucred); /* XXX */ 3228 nfsm_postop_attr(vp, attrflag, 0); 3229 if (!error) { 3230 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3231 NFSX_V3PATHCONF); 3232 switch (ap->a_name) { 3233 case _PC_LINK_MAX: 3234 *ap->a_retval = 3235 fxdr_unsigned(register_t, pcp->pc_linkmax); 3236 break; 3237 case _PC_NAME_MAX: 3238 *ap->a_retval = 3239 fxdr_unsigned(register_t, pcp->pc_namemax); 3240 break; 3241 case _PC_CHOWN_RESTRICTED: 3242 *ap->a_retval = 3243 (pcp->pc_chownrestricted == nfs_true); 3244 break; 3245 case _PC_NO_TRUNC: 3246 *ap->a_retval = 3247 (pcp->pc_notrunc == nfs_true); 3248 break; 3249 } 3250 } 3251 nfsm_reqdone; 3252 break; 3253 case _PC_FILESIZEBITS: 3254 #ifndef NFS_V2_ONLY 3255 if (v3) { 3256 nmp = VFSTONFS(vp->v_mount); 3257 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3258 if ((error = nfs_fsinfo(nmp, vp, 3259 curproc->p_ucred, curproc)) != 0) /* XXX */ 3260 break; 3261 for (l = 0, maxsize = nmp->nm_maxfilesize; 3262 (maxsize >> l) > 0; l++) 3263 ; 3264 *ap->a_retval = l + 1; 3265 } else 3266 #endif 3267 { 3268 *ap->a_retval = 32; /* NFS V2 limitation */ 3269 } 3270 break; 3271 default: 3272 error = EINVAL; 3273 break; 3274 } 3275 3276 return (error); 3277 } 3278 3279 /* 3280 * NFS advisory byte-level locks. 3281 */ 3282 int 3283 nfs_advlock(v) 3284 void *v; 3285 { 3286 struct vop_advlock_args /* { 3287 struct vnode *a_vp; 3288 caddr_t a_id; 3289 int a_op; 3290 struct flock *a_fl; 3291 int a_flags; 3292 } */ *ap = v; 3293 struct nfsnode *np = VTONFS(ap->a_vp); 3294 3295 return lf_advlock(ap, &np->n_lockf, np->n_size); 3296 } 3297 3298 /* 3299 * Print out the contents of an nfsnode. 3300 */ 3301 int 3302 nfs_print(v) 3303 void *v; 3304 { 3305 struct vop_print_args /* { 3306 struct vnode *a_vp; 3307 } */ *ap = v; 3308 struct vnode *vp = ap->a_vp; 3309 struct nfsnode *np = VTONFS(vp); 3310 3311 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3312 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3313 if (vp->v_type == VFIFO) 3314 fifo_printinfo(vp); 3315 printf("\n"); 3316 return (0); 3317 } 3318 3319 /* 3320 * NFS file truncation. 3321 */ 3322 int 3323 nfs_truncate(v) 3324 void *v; 3325 { 3326 #if 0 3327 struct vop_truncate_args /* { 3328 struct vnode *a_vp; 3329 off_t a_length; 3330 int a_flags; 3331 struct ucred *a_cred; 3332 struct proc *a_p; 3333 } */ *ap = v; 3334 #endif 3335 3336 /* Use nfs_setattr */ 3337 return (EOPNOTSUPP); 3338 } 3339 3340 /* 3341 * NFS update. 3342 */ 3343 int 3344 nfs_update(v) 3345 void *v; 3346 #if 0 3347 struct vop_update_args /* { 3348 struct vnode *a_vp; 3349 struct timespec *a_ta; 3350 struct timespec *a_tm; 3351 int a_waitfor; 3352 } */ *ap = v; 3353 #endif 3354 { 3355 3356 /* Use nfs_setattr */ 3357 return (EOPNOTSUPP); 3358 } 3359 3360 /* 3361 * Just call bwrite(). 3362 */ 3363 int 3364 nfs_bwrite(v) 3365 void *v; 3366 { 3367 struct vop_bwrite_args /* { 3368 struct vnode *a_bp; 3369 } */ *ap = v; 3370 3371 return (bwrite(ap->a_bp)); 3372 } 3373 3374 /* 3375 * nfs unlock wrapper. 3376 */ 3377 int 3378 nfs_unlock(void *v) 3379 { 3380 struct vop_unlock_args /* { 3381 struct vnode *a_vp; 3382 int a_flags; 3383 } */ *ap = v; 3384 struct vnode *vp = ap->a_vp; 3385 3386 /* 3387 * VOP_UNLOCK can be called by nfs_loadattrcache 3388 * with v_data == 0. 3389 */ 3390 if (VTONFS(vp)) { 3391 nfs_delayedtruncate(vp); 3392 } 3393 3394 return genfs_unlock(v); 3395 } 3396 3397 /* 3398 * nfs special file access vnode op. 3399 * Essentially just get vattr and then imitate iaccess() since the device is 3400 * local to the client. 3401 */ 3402 int 3403 nfsspec_access(v) 3404 void *v; 3405 { 3406 struct vop_access_args /* { 3407 struct vnode *a_vp; 3408 int a_mode; 3409 struct ucred *a_cred; 3410 struct proc *a_p; 3411 } */ *ap = v; 3412 struct vattr va; 3413 struct vnode *vp = ap->a_vp; 3414 int error; 3415 3416 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3417 if (error) 3418 return (error); 3419 3420 /* 3421 * Disallow write attempts on filesystems mounted read-only; 3422 * unless the file is a socket, fifo, or a block or character 3423 * device resident on the filesystem. 3424 */ 3425 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3426 switch (vp->v_type) { 3427 case VREG: 3428 case VDIR: 3429 case VLNK: 3430 return (EROFS); 3431 default: 3432 break; 3433 } 3434 } 3435 3436 return (vaccess(va.va_type, va.va_mode, 3437 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3438 } 3439 3440 /* 3441 * Read wrapper for special devices. 3442 */ 3443 int 3444 nfsspec_read(v) 3445 void *v; 3446 { 3447 struct vop_read_args /* { 3448 struct vnode *a_vp; 3449 struct uio *a_uio; 3450 int a_ioflag; 3451 struct ucred *a_cred; 3452 } */ *ap = v; 3453 struct nfsnode *np = VTONFS(ap->a_vp); 3454 3455 /* 3456 * Set access flag. 3457 */ 3458 np->n_flag |= NACC; 3459 np->n_atim.tv_sec = time.tv_sec; 3460 np->n_atim.tv_nsec = time.tv_usec * 1000; 3461 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3462 } 3463 3464 /* 3465 * Write wrapper for special devices. 3466 */ 3467 int 3468 nfsspec_write(v) 3469 void *v; 3470 { 3471 struct vop_write_args /* { 3472 struct vnode *a_vp; 3473 struct uio *a_uio; 3474 int a_ioflag; 3475 struct ucred *a_cred; 3476 } */ *ap = v; 3477 struct nfsnode *np = VTONFS(ap->a_vp); 3478 3479 /* 3480 * Set update flag. 3481 */ 3482 np->n_flag |= NUPD; 3483 np->n_mtim.tv_sec = time.tv_sec; 3484 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3485 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3486 } 3487 3488 /* 3489 * Close wrapper for special devices. 3490 * 3491 * Update the times on the nfsnode then do device close. 3492 */ 3493 int 3494 nfsspec_close(v) 3495 void *v; 3496 { 3497 struct vop_close_args /* { 3498 struct vnode *a_vp; 3499 int a_fflag; 3500 struct ucred *a_cred; 3501 struct proc *a_p; 3502 } */ *ap = v; 3503 struct vnode *vp = ap->a_vp; 3504 struct nfsnode *np = VTONFS(vp); 3505 struct vattr vattr; 3506 3507 if (np->n_flag & (NACC | NUPD)) { 3508 np->n_flag |= NCHG; 3509 if (vp->v_usecount == 1 && 3510 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3511 VATTR_NULL(&vattr); 3512 if (np->n_flag & NACC) 3513 vattr.va_atime = np->n_atim; 3514 if (np->n_flag & NUPD) 3515 vattr.va_mtime = np->n_mtim; 3516 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3517 } 3518 } 3519 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3520 } 3521 3522 /* 3523 * Read wrapper for fifos. 3524 */ 3525 int 3526 nfsfifo_read(v) 3527 void *v; 3528 { 3529 struct vop_read_args /* { 3530 struct vnode *a_vp; 3531 struct uio *a_uio; 3532 int a_ioflag; 3533 struct ucred *a_cred; 3534 } */ *ap = v; 3535 struct nfsnode *np = VTONFS(ap->a_vp); 3536 3537 /* 3538 * Set access flag. 3539 */ 3540 np->n_flag |= NACC; 3541 np->n_atim.tv_sec = time.tv_sec; 3542 np->n_atim.tv_nsec = time.tv_usec * 1000; 3543 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3544 } 3545 3546 /* 3547 * Write wrapper for fifos. 3548 */ 3549 int 3550 nfsfifo_write(v) 3551 void *v; 3552 { 3553 struct vop_write_args /* { 3554 struct vnode *a_vp; 3555 struct uio *a_uio; 3556 int a_ioflag; 3557 struct ucred *a_cred; 3558 } */ *ap = v; 3559 struct nfsnode *np = VTONFS(ap->a_vp); 3560 3561 /* 3562 * Set update flag. 3563 */ 3564 np->n_flag |= NUPD; 3565 np->n_mtim.tv_sec = time.tv_sec; 3566 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3567 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3568 } 3569 3570 /* 3571 * Close wrapper for fifos. 3572 * 3573 * Update the times on the nfsnode then do fifo close. 3574 */ 3575 int 3576 nfsfifo_close(v) 3577 void *v; 3578 { 3579 struct vop_close_args /* { 3580 struct vnode *a_vp; 3581 int a_fflag; 3582 struct ucred *a_cred; 3583 struct proc *a_p; 3584 } */ *ap = v; 3585 struct vnode *vp = ap->a_vp; 3586 struct nfsnode *np = VTONFS(vp); 3587 struct vattr vattr; 3588 3589 if (np->n_flag & (NACC | NUPD)) { 3590 if (np->n_flag & NACC) { 3591 np->n_atim.tv_sec = time.tv_sec; 3592 np->n_atim.tv_nsec = time.tv_usec * 1000; 3593 } 3594 if (np->n_flag & NUPD) { 3595 np->n_mtim.tv_sec = time.tv_sec; 3596 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3597 } 3598 np->n_flag |= NCHG; 3599 if (vp->v_usecount == 1 && 3600 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3601 VATTR_NULL(&vattr); 3602 if (np->n_flag & NACC) 3603 vattr.va_atime = np->n_atim; 3604 if (np->n_flag & NUPD) 3605 vattr.va_mtime = np->n_mtim; 3606 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3607 } 3608 } 3609 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3610 }
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