nfs_vnops.c revision 1.169
1 /* $NetBSD: nfs_vnops.c,v 1.169 2003/05/26 13:34:38 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.169 2003/05/26 13:34:38 yamt Exp $"); 47 48 #include "opt_nfs.h" 49 #include "opt_uvmhist.h" 50 51 #include <sys/param.h> 52 #include <sys/proc.h> 53 #include <sys/kernel.h> 54 #include <sys/systm.h> 55 #include <sys/resourcevar.h> 56 #include <sys/proc.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/malloc.h> 60 #include <sys/mbuf.h> 61 #include <sys/namei.h> 62 #include <sys/vnode.h> 63 #include <sys/dirent.h> 64 #include <sys/fcntl.h> 65 #include <sys/hash.h> 66 #include <sys/lockf.h> 67 #include <sys/stat.h> 68 #include <sys/unistd.h> 69 70 #include <uvm/uvm_extern.h> 71 #include <uvm/uvm.h> 72 73 #include <miscfs/fifofs/fifo.h> 74 #include <miscfs/genfs/genfs.h> 75 #include <miscfs/specfs/specdev.h> 76 77 #include <nfs/rpcv2.h> 78 #include <nfs/nfsproto.h> 79 #include <nfs/nfs.h> 80 #include <nfs/nfsnode.h> 81 #include <nfs/nfsmount.h> 82 #include <nfs/xdr_subs.h> 83 #include <nfs/nfsm_subs.h> 84 #include <nfs/nqnfs.h> 85 #include <nfs/nfs_var.h> 86 87 #include <net/if.h> 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 91 /* 92 * Global vfs data structures for nfs 93 */ 94 int (**nfsv2_vnodeop_p) __P((void *)); 95 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 96 { &vop_default_desc, vn_default_error }, 97 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 98 { &vop_create_desc, nfs_create }, /* create */ 99 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 100 { &vop_open_desc, nfs_open }, /* open */ 101 { &vop_close_desc, nfs_close }, /* close */ 102 { &vop_access_desc, nfs_access }, /* access */ 103 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 104 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 105 { &vop_read_desc, nfs_read }, /* read */ 106 { &vop_write_desc, nfs_write }, /* write */ 107 { &vop_lease_desc, nfs_lease_check }, /* lease */ 108 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, nfs_poll }, /* poll */ 111 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 112 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 113 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 114 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 115 { &vop_seek_desc, nfs_seek }, /* seek */ 116 { &vop_remove_desc, nfs_remove }, /* remove */ 117 { &vop_link_desc, nfs_link }, /* link */ 118 { &vop_rename_desc, nfs_rename }, /* rename */ 119 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 120 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 121 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 122 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 123 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 124 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 125 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 126 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 127 { &vop_lock_desc, nfs_lock }, /* lock */ 128 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 129 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 130 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 131 { &vop_print_desc, nfs_print }, /* print */ 132 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 133 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 134 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 135 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 136 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 137 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 138 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 139 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 140 { &vop_update_desc, nfs_update }, /* update */ 141 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 142 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 143 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 144 { NULL, NULL } 145 }; 146 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 147 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 148 149 /* 150 * Special device vnode ops 151 */ 152 int (**spec_nfsv2nodeop_p) __P((void *)); 153 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 154 { &vop_default_desc, vn_default_error }, 155 { &vop_lookup_desc, spec_lookup }, /* lookup */ 156 { &vop_create_desc, spec_create }, /* create */ 157 { &vop_mknod_desc, spec_mknod }, /* mknod */ 158 { &vop_open_desc, spec_open }, /* open */ 159 { &vop_close_desc, nfsspec_close }, /* close */ 160 { &vop_access_desc, nfsspec_access }, /* access */ 161 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 162 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 163 { &vop_read_desc, nfsspec_read }, /* read */ 164 { &vop_write_desc, nfsspec_write }, /* write */ 165 { &vop_lease_desc, spec_lease_check }, /* lease */ 166 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 167 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 168 { &vop_poll_desc, spec_poll }, /* poll */ 169 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 170 { &vop_revoke_desc, spec_revoke }, /* revoke */ 171 { &vop_mmap_desc, spec_mmap }, /* mmap */ 172 { &vop_fsync_desc, spec_fsync }, /* fsync */ 173 { &vop_seek_desc, spec_seek }, /* seek */ 174 { &vop_remove_desc, spec_remove }, /* remove */ 175 { &vop_link_desc, spec_link }, /* link */ 176 { &vop_rename_desc, spec_rename }, /* rename */ 177 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 178 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 179 { &vop_symlink_desc, spec_symlink }, /* symlink */ 180 { &vop_readdir_desc, spec_readdir }, /* readdir */ 181 { &vop_readlink_desc, spec_readlink }, /* readlink */ 182 { &vop_abortop_desc, spec_abortop }, /* abortop */ 183 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 184 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 185 { &vop_lock_desc, nfs_lock }, /* lock */ 186 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 187 { &vop_bmap_desc, spec_bmap }, /* bmap */ 188 { &vop_strategy_desc, spec_strategy }, /* strategy */ 189 { &vop_print_desc, nfs_print }, /* print */ 190 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 191 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 192 { &vop_advlock_desc, spec_advlock }, /* advlock */ 193 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 194 { &vop_valloc_desc, spec_valloc }, /* valloc */ 195 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 196 { &vop_vfree_desc, spec_vfree }, /* vfree */ 197 { &vop_truncate_desc, spec_truncate }, /* truncate */ 198 { &vop_update_desc, nfs_update }, /* update */ 199 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 200 { &vop_getpages_desc, spec_getpages }, /* getpages */ 201 { &vop_putpages_desc, spec_putpages }, /* putpages */ 202 { NULL, NULL } 203 }; 204 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 205 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 206 207 int (**fifo_nfsv2nodeop_p) __P((void *)); 208 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 209 { &vop_default_desc, vn_default_error }, 210 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 211 { &vop_create_desc, fifo_create }, /* create */ 212 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 213 { &vop_open_desc, fifo_open }, /* open */ 214 { &vop_close_desc, nfsfifo_close }, /* close */ 215 { &vop_access_desc, nfsspec_access }, /* access */ 216 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 217 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 218 { &vop_read_desc, nfsfifo_read }, /* read */ 219 { &vop_write_desc, nfsfifo_write }, /* write */ 220 { &vop_lease_desc, fifo_lease_check }, /* lease */ 221 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 222 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 223 { &vop_poll_desc, fifo_poll }, /* poll */ 224 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 225 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 226 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 227 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 228 { &vop_seek_desc, fifo_seek }, /* seek */ 229 { &vop_remove_desc, fifo_remove }, /* remove */ 230 { &vop_link_desc, fifo_link }, /* link */ 231 { &vop_rename_desc, fifo_rename }, /* rename */ 232 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 233 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 234 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 235 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 236 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 237 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 238 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 239 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 240 { &vop_lock_desc, nfs_lock }, /* lock */ 241 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 242 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 243 { &vop_strategy_desc, genfs_badop }, /* strategy */ 244 { &vop_print_desc, nfs_print }, /* print */ 245 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 246 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 247 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 248 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 249 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 250 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 251 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 252 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 253 { &vop_update_desc, nfs_update }, /* update */ 254 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 255 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 256 { NULL, NULL } 257 }; 258 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 259 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 260 261 static void nfs_noop(struct mbuf *, caddr_t, size_t, void *); 262 263 /* 264 * Global variables 265 */ 266 extern u_int32_t nfs_true, nfs_false; 267 extern u_int32_t nfs_xdrneg1; 268 extern const nfstype nfsv3_type[9]; 269 270 int nfs_numasync = 0; 271 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 272 273 /* 274 * nfs null call from vfs. 275 */ 276 int 277 nfs_null(vp, cred, procp) 278 struct vnode *vp; 279 struct ucred *cred; 280 struct proc *procp; 281 { 282 caddr_t bpos, dpos; 283 int error = 0; 284 struct mbuf *mreq, *mrep, *md, *mb; 285 struct nfsnode *np = VTONFS(vp); 286 287 nfsm_reqhead(np, NFSPROC_NULL, 0); 288 nfsm_request(np, NFSPROC_NULL, procp, cred); 289 nfsm_reqdone; 290 return (error); 291 } 292 293 /* 294 * nfs access vnode op. 295 * For nfs version 2, just return ok. File accesses may fail later. 296 * For nfs version 3, use the access rpc to check accessibility. If file modes 297 * are changed on the server, accesses might still fail later. 298 */ 299 int 300 nfs_access(v) 301 void *v; 302 { 303 struct vop_access_args /* { 304 struct vnode *a_vp; 305 int a_mode; 306 struct ucred *a_cred; 307 struct proc *a_p; 308 } */ *ap = v; 309 struct vnode *vp = ap->a_vp; 310 u_int32_t *tl; 311 caddr_t cp; 312 int32_t t1, t2; 313 caddr_t bpos, dpos, cp2; 314 int error = 0, attrflag, cachevalid; 315 struct mbuf *mreq, *mrep, *md, *mb; 316 u_int32_t mode, rmode; 317 const int v3 = NFS_ISV3(vp); 318 struct nfsnode *np = VTONFS(vp); 319 320 cachevalid = (np->n_accstamp != -1 && 321 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 322 np->n_accuid == ap->a_cred->cr_uid); 323 324 /* 325 * Check access cache first. If this request has been made for this 326 * uid shortly before, use the cached result. 327 */ 328 if (cachevalid) { 329 if (!np->n_accerror) { 330 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 331 return np->n_accerror; 332 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 333 return np->n_accerror; 334 } 335 336 /* 337 * For nfs v3, do an access rpc, otherwise you are stuck emulating 338 * ufs_access() locally using the vattr. This may not be correct, 339 * since the server may apply other access criteria such as 340 * client uid-->server uid mapping that we do not know about, but 341 * this is better than just returning anything that is lying about 342 * in the cache. 343 */ 344 if (v3) { 345 nfsstats.rpccnt[NFSPROC_ACCESS]++; 346 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 347 nfsm_fhtom(np, v3); 348 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 349 if (ap->a_mode & VREAD) 350 mode = NFSV3ACCESS_READ; 351 else 352 mode = 0; 353 if (vp->v_type != VDIR) { 354 if (ap->a_mode & VWRITE) 355 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 356 if (ap->a_mode & VEXEC) 357 mode |= NFSV3ACCESS_EXECUTE; 358 } else { 359 if (ap->a_mode & VWRITE) 360 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 361 NFSV3ACCESS_DELETE); 362 if (ap->a_mode & VEXEC) 363 mode |= NFSV3ACCESS_LOOKUP; 364 } 365 *tl = txdr_unsigned(mode); 366 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 367 nfsm_postop_attr(vp, attrflag, 0); 368 if (!error) { 369 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 370 rmode = fxdr_unsigned(u_int32_t, *tl); 371 /* 372 * The NFS V3 spec does not clarify whether or not 373 * the returned access bits can be a superset of 374 * the ones requested, so... 375 */ 376 if ((rmode & mode) != mode) 377 error = EACCES; 378 } 379 nfsm_reqdone; 380 } else 381 return (nfsspec_access(ap)); 382 /* 383 * Disallow write attempts on filesystems mounted read-only; 384 * unless the file is a socket, fifo, or a block or character 385 * device resident on the filesystem. 386 */ 387 if (!error && (ap->a_mode & VWRITE) && 388 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 389 switch (vp->v_type) { 390 case VREG: 391 case VDIR: 392 case VLNK: 393 error = EROFS; 394 default: 395 break; 396 } 397 } 398 399 if (!error || error == EACCES) { 400 /* 401 * If we got the same result as for a previous, 402 * different request, OR it in. Don't update 403 * the timestamp in that case. 404 */ 405 if (cachevalid && np->n_accstamp != -1 && 406 error == np->n_accerror) { 407 if (!error) 408 np->n_accmode |= ap->a_mode; 409 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 410 np->n_accmode = ap->a_mode; 411 } else { 412 np->n_accstamp = time.tv_sec; 413 np->n_accuid = ap->a_cred->cr_uid; 414 np->n_accmode = ap->a_mode; 415 np->n_accerror = error; 416 } 417 } 418 419 return (error); 420 } 421 422 /* 423 * nfs open vnode op 424 * Check to see if the type is ok 425 * and that deletion is not in progress. 426 * For paged in text files, you will need to flush the page cache 427 * if consistency is lost. 428 */ 429 /* ARGSUSED */ 430 int 431 nfs_open(v) 432 void *v; 433 { 434 struct vop_open_args /* { 435 struct vnode *a_vp; 436 int a_mode; 437 struct ucred *a_cred; 438 struct proc *a_p; 439 } */ *ap = v; 440 struct vnode *vp = ap->a_vp; 441 struct nfsnode *np = VTONFS(vp); 442 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 443 struct vattr vattr; 444 int error; 445 446 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 447 return (EACCES); 448 } 449 450 /* 451 * Initialize read and write creds here, for swapfiles 452 * and other paths that don't set the creds themselves. 453 */ 454 455 if (ap->a_mode & FREAD) { 456 if (np->n_rcred) { 457 crfree(np->n_rcred); 458 } 459 np->n_rcred = ap->a_cred; 460 crhold(np->n_rcred); 461 } 462 if (ap->a_mode & FWRITE) { 463 if (np->n_wcred) { 464 crfree(np->n_wcred); 465 } 466 np->n_wcred = ap->a_cred; 467 crhold(np->n_wcred); 468 } 469 470 #ifndef NFS_V2_ONLY 471 /* 472 * Get a valid lease. If cached data is stale, flush it. 473 */ 474 if (nmp->nm_flag & NFSMNT_NQNFS) { 475 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 476 do { 477 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 478 ap->a_p); 479 } while (error == NQNFS_EXPIRED); 480 if (error) 481 return (error); 482 if (np->n_lrev != np->n_brev || 483 (np->n_flag & NQNFSNONCACHE)) { 484 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 485 ap->a_p, 1)) == EINTR) 486 return (error); 487 np->n_brev = np->n_lrev; 488 } 489 } 490 } else 491 #endif 492 { 493 if (np->n_flag & NMODIFIED) { 494 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 495 ap->a_p, 1)) == EINTR) 496 return (error); 497 np->n_attrstamp = 0; 498 if (vp->v_type == VDIR) { 499 nfs_invaldircache(vp, 0); 500 np->n_direofoffset = 0; 501 } 502 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 503 if (error) 504 return (error); 505 np->n_mtime = vattr.va_mtime.tv_sec; 506 } else { 507 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 508 if (error) 509 return (error); 510 if (np->n_mtime != vattr.va_mtime.tv_sec) { 511 if (vp->v_type == VDIR) { 512 nfs_invaldircache(vp, 0); 513 np->n_direofoffset = 0; 514 } 515 if ((error = nfs_vinvalbuf(vp, V_SAVE, 516 ap->a_cred, ap->a_p, 1)) == EINTR) 517 return (error); 518 np->n_mtime = vattr.va_mtime.tv_sec; 519 } 520 } 521 } 522 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 523 np->n_attrstamp = 0; /* For Open/Close consistency */ 524 return (0); 525 } 526 527 /* 528 * nfs close vnode op 529 * What an NFS client should do upon close after writing is a debatable issue. 530 * Most NFS clients push delayed writes to the server upon close, basically for 531 * two reasons: 532 * 1 - So that any write errors may be reported back to the client process 533 * doing the close system call. By far the two most likely errors are 534 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 535 * 2 - To put a worst case upper bound on cache inconsistency between 536 * multiple clients for the file. 537 * There is also a consistency problem for Version 2 of the protocol w.r.t. 538 * not being able to tell if other clients are writing a file concurrently, 539 * since there is no way of knowing if the changed modify time in the reply 540 * is only due to the write for this client. 541 * (NFS Version 3 provides weak cache consistency data in the reply that 542 * should be sufficient to detect and handle this case.) 543 * 544 * The current code does the following: 545 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 546 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 547 * or commit them (this satisfies 1 and 2 except for the 548 * case where the server crashes after this close but 549 * before the commit RPC, which is felt to be "good 550 * enough". Changing the last argument to nfs_flush() to 551 * a 1 would force a commit operation, if it is felt a 552 * commit is necessary now. 553 * for NQNFS - do nothing now, since 2 is dealt with via leases and 554 * 1 should be dealt with via an fsync() system call for 555 * cases where write errors are important. 556 */ 557 /* ARGSUSED */ 558 int 559 nfs_close(v) 560 void *v; 561 { 562 struct vop_close_args /* { 563 struct vnodeop_desc *a_desc; 564 struct vnode *a_vp; 565 int a_fflag; 566 struct ucred *a_cred; 567 struct proc *a_p; 568 } */ *ap = v; 569 struct vnode *vp = ap->a_vp; 570 struct nfsnode *np = VTONFS(vp); 571 int error = 0; 572 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 573 574 if (vp->v_type == VREG) { 575 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 576 (np->n_flag & NMODIFIED)) { 577 if (NFS_ISV3(vp)) { 578 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 579 np->n_flag &= ~NMODIFIED; 580 } else 581 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 582 np->n_attrstamp = 0; 583 } 584 if (np->n_flag & NWRITEERR) { 585 np->n_flag &= ~NWRITEERR; 586 error = np->n_error; 587 } 588 } 589 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 590 return (error); 591 } 592 593 /* 594 * nfs getattr call from vfs. 595 */ 596 int 597 nfs_getattr(v) 598 void *v; 599 { 600 struct vop_getattr_args /* { 601 struct vnode *a_vp; 602 struct vattr *a_vap; 603 struct ucred *a_cred; 604 struct proc *a_p; 605 } */ *ap = v; 606 struct vnode *vp = ap->a_vp; 607 struct nfsnode *np = VTONFS(vp); 608 caddr_t cp; 609 u_int32_t *tl; 610 int32_t t1, t2; 611 caddr_t bpos, dpos; 612 int error = 0; 613 struct mbuf *mreq, *mrep, *md, *mb; 614 const int v3 = NFS_ISV3(vp); 615 616 /* 617 * Update local times for special files. 618 */ 619 if (np->n_flag & (NACC | NUPD)) 620 np->n_flag |= NCHG; 621 /* 622 * First look in the cache. 623 */ 624 if (nfs_getattrcache(vp, ap->a_vap) == 0) 625 return (0); 626 nfsstats.rpccnt[NFSPROC_GETATTR]++; 627 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 628 nfsm_fhtom(np, v3); 629 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 630 if (!error) { 631 nfsm_loadattr(vp, ap->a_vap, 0); 632 if (vp->v_type == VDIR && 633 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 634 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 635 } 636 nfsm_reqdone; 637 return (error); 638 } 639 640 /* 641 * nfs setattr call. 642 */ 643 int 644 nfs_setattr(v) 645 void *v; 646 { 647 struct vop_setattr_args /* { 648 struct vnodeop_desc *a_desc; 649 struct vnode *a_vp; 650 struct vattr *a_vap; 651 struct ucred *a_cred; 652 struct proc *a_p; 653 } */ *ap = v; 654 struct vnode *vp = ap->a_vp; 655 struct nfsnode *np = VTONFS(vp); 656 struct vattr *vap = ap->a_vap; 657 int error = 0; 658 u_quad_t tsize = 0; 659 660 /* 661 * Setting of flags is not supported. 662 */ 663 if (vap->va_flags != VNOVAL) 664 return (EOPNOTSUPP); 665 666 /* 667 * Disallow write attempts if the filesystem is mounted read-only. 668 */ 669 if ((vap->va_uid != (uid_t)VNOVAL || 670 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 671 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 672 (vp->v_mount->mnt_flag & MNT_RDONLY)) 673 return (EROFS); 674 if (vap->va_size != VNOVAL) { 675 switch (vp->v_type) { 676 case VDIR: 677 return (EISDIR); 678 case VCHR: 679 case VBLK: 680 case VSOCK: 681 case VFIFO: 682 if (vap->va_mtime.tv_sec == VNOVAL && 683 vap->va_atime.tv_sec == VNOVAL && 684 vap->va_mode == (mode_t)VNOVAL && 685 vap->va_uid == (uid_t)VNOVAL && 686 vap->va_gid == (gid_t)VNOVAL) 687 return (0); 688 vap->va_size = VNOVAL; 689 break; 690 default: 691 /* 692 * Disallow write attempts if the filesystem is 693 * mounted read-only. 694 */ 695 if (vp->v_mount->mnt_flag & MNT_RDONLY) 696 return (EROFS); 697 uvm_vnp_setsize(vp, vap->va_size); 698 tsize = np->n_size; 699 np->n_size = vap->va_size; 700 if (vap->va_size == 0) 701 error = nfs_vinvalbuf(vp, 0, 702 ap->a_cred, ap->a_p, 1); 703 else 704 error = nfs_vinvalbuf(vp, V_SAVE, 705 ap->a_cred, ap->a_p, 1); 706 if (error) { 707 uvm_vnp_setsize(vp, tsize); 708 return (error); 709 } 710 np->n_vattr->va_size = vap->va_size; 711 } 712 } else if ((vap->va_mtime.tv_sec != VNOVAL || 713 vap->va_atime.tv_sec != VNOVAL) && 714 vp->v_type == VREG && 715 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 716 ap->a_p, 1)) == EINTR) 717 return (error); 718 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 719 if (error && vap->va_size != VNOVAL) { 720 np->n_size = np->n_vattr->va_size = tsize; 721 uvm_vnp_setsize(vp, np->n_size); 722 } 723 VN_KNOTE(vp, NOTE_ATTRIB); 724 return (error); 725 } 726 727 /* 728 * Do an nfs setattr rpc. 729 */ 730 int 731 nfs_setattrrpc(vp, vap, cred, procp) 732 struct vnode *vp; 733 struct vattr *vap; 734 struct ucred *cred; 735 struct proc *procp; 736 { 737 struct nfsv2_sattr *sp; 738 caddr_t cp; 739 int32_t t1, t2; 740 caddr_t bpos, dpos, cp2; 741 u_int32_t *tl; 742 int error = 0, wccflag = NFSV3_WCCRATTR; 743 struct mbuf *mreq, *mrep, *md, *mb; 744 const int v3 = NFS_ISV3(vp); 745 struct nfsnode *np = VTONFS(vp); 746 747 nfsstats.rpccnt[NFSPROC_SETATTR]++; 748 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 749 nfsm_fhtom(np, v3); 750 if (v3) { 751 nfsm_v3attrbuild(vap, TRUE); 752 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 753 *tl = nfs_false; 754 } else { 755 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 756 if (vap->va_mode == (mode_t)VNOVAL) 757 sp->sa_mode = nfs_xdrneg1; 758 else 759 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 760 if (vap->va_uid == (uid_t)VNOVAL) 761 sp->sa_uid = nfs_xdrneg1; 762 else 763 sp->sa_uid = txdr_unsigned(vap->va_uid); 764 if (vap->va_gid == (gid_t)VNOVAL) 765 sp->sa_gid = nfs_xdrneg1; 766 else 767 sp->sa_gid = txdr_unsigned(vap->va_gid); 768 sp->sa_size = txdr_unsigned(vap->va_size); 769 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 770 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 771 } 772 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 773 if (v3) { 774 nfsm_wcc_data(vp, wccflag, 0); 775 } else 776 nfsm_loadattr(vp, (struct vattr *)0, 0); 777 nfsm_reqdone; 778 return (error); 779 } 780 781 /* 782 * nfs lookup call, one step at a time... 783 * First look in cache 784 * If not found, unlock the directory nfsnode and do the rpc 785 * 786 * This code is full of lock/unlock statements and checks, because 787 * we continue after cache_lookup has finished (we need to check 788 * with the attr cache and do an rpc if it has timed out). This means 789 * that the locking effects of cache_lookup have to be taken into 790 * account. 791 */ 792 int 793 nfs_lookup(v) 794 void *v; 795 { 796 struct vop_lookup_args /* { 797 struct vnodeop_desc *a_desc; 798 struct vnode *a_dvp; 799 struct vnode **a_vpp; 800 struct componentname *a_cnp; 801 } */ *ap = v; 802 struct componentname *cnp = ap->a_cnp; 803 struct vnode *dvp = ap->a_dvp; 804 struct vnode **vpp = ap->a_vpp; 805 int flags; 806 struct vnode *newvp; 807 u_int32_t *tl; 808 caddr_t cp; 809 int32_t t1, t2; 810 caddr_t bpos, dpos, cp2; 811 struct mbuf *mreq, *mrep, *md, *mb; 812 long len; 813 nfsfh_t *fhp; 814 struct nfsnode *np; 815 int lockparent, wantparent, error = 0, attrflag, fhsize; 816 const int v3 = NFS_ISV3(dvp); 817 818 cnp->cn_flags &= ~PDIRUNLOCK; 819 flags = cnp->cn_flags; 820 821 *vpp = NULLVP; 822 newvp = NULLVP; 823 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 824 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 825 return (EROFS); 826 if (dvp->v_type != VDIR) 827 return (ENOTDIR); 828 829 lockparent = flags & LOCKPARENT; 830 wantparent = flags & (LOCKPARENT|WANTPARENT); 831 np = VTONFS(dvp); 832 833 /* 834 * Before tediously performing a linear scan of the directory, 835 * check the name cache to see if the directory/name pair 836 * we are looking for is known already. 837 * If the directory/name pair is found in the name cache, 838 * we have to ensure the directory has not changed from 839 * the time the cache entry has been created. If it has, 840 * the cache entry has to be ignored. 841 */ 842 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 843 struct vattr vattr; 844 int err2; 845 846 if (error && error != ENOENT) { 847 *vpp = NULLVP; 848 return error; 849 } 850 851 if (cnp->cn_flags & PDIRUNLOCK) { 852 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 853 if (err2 != 0) { 854 *vpp = NULLVP; 855 return err2; 856 } 857 cnp->cn_flags &= ~PDIRUNLOCK; 858 } 859 860 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 861 if (err2 != 0) { 862 if (error == 0) { 863 if (*vpp != dvp) 864 vput(*vpp); 865 else 866 vrele(*vpp); 867 } 868 *vpp = NULLVP; 869 return err2; 870 } 871 872 if (error == ENOENT) { 873 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 874 cnp->cn_proc) && vattr.va_mtime.tv_sec == 875 VTONFS(dvp)->n_nctime) 876 return ENOENT; 877 cache_purge(dvp); 878 np->n_nctime = 0; 879 goto dorpc; 880 } 881 882 newvp = *vpp; 883 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 884 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 885 { 886 nfsstats.lookupcache_hits++; 887 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 888 cnp->cn_flags |= SAVENAME; 889 if ((!lockparent || !(flags & ISLASTCN)) && 890 newvp != dvp) 891 VOP_UNLOCK(dvp, 0); 892 return (0); 893 } 894 cache_purge(newvp); 895 if (newvp != dvp) 896 vput(newvp); 897 else 898 vrele(newvp); 899 *vpp = NULLVP; 900 } 901 dorpc: 902 error = 0; 903 newvp = NULLVP; 904 nfsstats.lookupcache_misses++; 905 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 906 len = cnp->cn_namelen; 907 nfsm_reqhead(np, NFSPROC_LOOKUP, 908 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 909 nfsm_fhtom(np, v3); 910 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 911 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 912 if (error) { 913 nfsm_postop_attr(dvp, attrflag, 0); 914 m_freem(mrep); 915 goto nfsmout; 916 } 917 nfsm_getfh(fhp, fhsize, v3); 918 919 /* 920 * Handle RENAME case... 921 */ 922 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 923 if (NFS_CMPFH(np, fhp, fhsize)) { 924 m_freem(mrep); 925 return (EISDIR); 926 } 927 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 928 if (error) { 929 m_freem(mrep); 930 return error; 931 } 932 newvp = NFSTOV(np); 933 if (v3) { 934 nfsm_postop_attr(newvp, attrflag, 0); 935 nfsm_postop_attr(dvp, attrflag, 0); 936 } else 937 nfsm_loadattr(newvp, (struct vattr *)0, 0); 938 *vpp = newvp; 939 m_freem(mrep); 940 cnp->cn_flags |= SAVENAME; 941 if (!lockparent) { 942 VOP_UNLOCK(dvp, 0); 943 cnp->cn_flags |= PDIRUNLOCK; 944 } 945 return (0); 946 } 947 948 /* 949 * The postop attr handling is duplicated for each if case, 950 * because it should be done while dvp is locked (unlocking 951 * dvp is different for each case). 952 */ 953 954 if (NFS_CMPFH(np, fhp, fhsize)) { 955 /* 956 * "." lookup 957 */ 958 VREF(dvp); 959 newvp = dvp; 960 if (v3) { 961 nfsm_postop_attr(newvp, attrflag, 0); 962 nfsm_postop_attr(dvp, attrflag, 0); 963 } else 964 nfsm_loadattr(newvp, (struct vattr *)0, 0); 965 } else if (flags & ISDOTDOT) { 966 /* 967 * ".." lookup 968 */ 969 VOP_UNLOCK(dvp, 0); 970 cnp->cn_flags |= PDIRUNLOCK; 971 972 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 973 if (error) { 974 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 975 cnp->cn_flags &= ~PDIRUNLOCK; 976 m_freem(mrep); 977 return error; 978 } 979 newvp = NFSTOV(np); 980 981 if (v3) { 982 nfsm_postop_attr(newvp, attrflag, 0); 983 nfsm_postop_attr(dvp, attrflag, 0); 984 } else 985 nfsm_loadattr(newvp, (struct vattr *)0, 0); 986 987 if (lockparent && (flags & ISLASTCN)) { 988 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 989 m_freem(mrep); 990 vput(newvp); 991 return error; 992 } 993 cnp->cn_flags &= ~PDIRUNLOCK; 994 } 995 } else { 996 /* 997 * Other lookups. 998 */ 999 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1000 if (error) { 1001 m_freem(mrep); 1002 return error; 1003 } 1004 newvp = NFSTOV(np); 1005 if (v3) { 1006 nfsm_postop_attr(newvp, attrflag, 0); 1007 nfsm_postop_attr(dvp, attrflag, 0); 1008 } else 1009 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1010 if (!lockparent || !(flags & ISLASTCN)) { 1011 VOP_UNLOCK(dvp, 0); 1012 cnp->cn_flags |= PDIRUNLOCK; 1013 } 1014 } 1015 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1016 cnp->cn_flags |= SAVENAME; 1017 if ((cnp->cn_flags & MAKEENTRY) && 1018 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1019 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1020 cache_enter(dvp, newvp, cnp); 1021 } 1022 *vpp = newvp; 1023 nfsm_reqdone; 1024 if (error) { 1025 /* 1026 * We get here only because of errors returned by 1027 * the RPC. Otherwise we'll have returned above 1028 * (the nfsm_* macros will jump to nfsm_reqdone 1029 * on error). 1030 */ 1031 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1032 cnp->cn_nameiop != CREATE) { 1033 if (VTONFS(dvp)->n_nctime == 0) 1034 VTONFS(dvp)->n_nctime = 1035 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1036 cache_enter(dvp, NULL, cnp); 1037 } 1038 if (newvp != NULLVP) { 1039 vrele(newvp); 1040 if (newvp != dvp) 1041 VOP_UNLOCK(newvp, 0); 1042 } 1043 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1044 (flags & ISLASTCN) && error == ENOENT) { 1045 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1046 error = EROFS; 1047 else 1048 error = EJUSTRETURN; 1049 } 1050 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1051 cnp->cn_flags |= SAVENAME; 1052 *vpp = NULL; 1053 } 1054 1055 return error; 1056 } 1057 1058 /* 1059 * nfs read call. 1060 * Just call nfs_bioread() to do the work. 1061 */ 1062 int 1063 nfs_read(v) 1064 void *v; 1065 { 1066 struct vop_read_args /* { 1067 struct vnode *a_vp; 1068 struct uio *a_uio; 1069 int a_ioflag; 1070 struct ucred *a_cred; 1071 } */ *ap = v; 1072 struct vnode *vp = ap->a_vp; 1073 1074 if (vp->v_type != VREG) 1075 return (EPERM); 1076 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1077 } 1078 1079 /* 1080 * nfs readlink call 1081 */ 1082 int 1083 nfs_readlink(v) 1084 void *v; 1085 { 1086 struct vop_readlink_args /* { 1087 struct vnode *a_vp; 1088 struct uio *a_uio; 1089 struct ucred *a_cred; 1090 } */ *ap = v; 1091 struct vnode *vp = ap->a_vp; 1092 1093 if (vp->v_type != VLNK) 1094 return (EPERM); 1095 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1096 } 1097 1098 /* 1099 * Do a readlink rpc. 1100 * Called by nfs_doio() from below the buffer cache. 1101 */ 1102 int 1103 nfs_readlinkrpc(vp, uiop, cred) 1104 struct vnode *vp; 1105 struct uio *uiop; 1106 struct ucred *cred; 1107 { 1108 u_int32_t *tl; 1109 caddr_t cp; 1110 int32_t t1, t2; 1111 caddr_t bpos, dpos, cp2; 1112 int error = 0, attrflag; 1113 uint32_t len; 1114 struct mbuf *mreq, *mrep, *md, *mb; 1115 const int v3 = NFS_ISV3(vp); 1116 struct nfsnode *np = VTONFS(vp); 1117 1118 nfsstats.rpccnt[NFSPROC_READLINK]++; 1119 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1120 nfsm_fhtom(np, v3); 1121 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1122 if (v3) 1123 nfsm_postop_attr(vp, attrflag, 0); 1124 if (!error) { 1125 if (v3) { 1126 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1127 len = fxdr_unsigned(uint32_t, *tl); 1128 if (len > MAXPATHLEN) { 1129 /* 1130 * this pathname is too long for us. 1131 */ 1132 m_freem(mrep); 1133 /* Solaris returns EINVAL. should we follow? */ 1134 error = ENAMETOOLONG; 1135 goto nfsmout; 1136 } 1137 } else { 1138 nfsm_strsiz(len, NFS_MAXPATHLEN); 1139 } 1140 nfsm_mtouio(uiop, len); 1141 } 1142 nfsm_reqdone; 1143 return (error); 1144 } 1145 1146 /* 1147 * nfs read rpc call 1148 * Ditto above 1149 */ 1150 int 1151 nfs_readrpc(vp, uiop) 1152 struct vnode *vp; 1153 struct uio *uiop; 1154 { 1155 u_int32_t *tl; 1156 caddr_t cp; 1157 int32_t t1, t2; 1158 caddr_t bpos, dpos, cp2; 1159 struct mbuf *mreq, *mrep, *md, *mb; 1160 struct nfsmount *nmp; 1161 int error = 0, len, retlen, tsiz, eof, attrflag; 1162 const int v3 = NFS_ISV3(vp); 1163 struct nfsnode *np = VTONFS(vp); 1164 1165 #ifndef nolint 1166 eof = 0; 1167 #endif 1168 nmp = VFSTONFS(vp->v_mount); 1169 tsiz = uiop->uio_resid; 1170 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1171 return (EFBIG); 1172 while (tsiz > 0) { 1173 nfsstats.rpccnt[NFSPROC_READ]++; 1174 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1175 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1176 nfsm_fhtom(np, v3); 1177 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1178 if (v3) { 1179 txdr_hyper(uiop->uio_offset, tl); 1180 *(tl + 2) = txdr_unsigned(len); 1181 } else { 1182 *tl++ = txdr_unsigned(uiop->uio_offset); 1183 *tl++ = txdr_unsigned(len); 1184 *tl = 0; 1185 } 1186 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, 1187 VTONFS(vp)->n_rcred); 1188 if (v3) { 1189 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1190 if (error) { 1191 m_freem(mrep); 1192 goto nfsmout; 1193 } 1194 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1195 eof = fxdr_unsigned(int, *(tl + 1)); 1196 } else 1197 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1198 nfsm_strsiz(retlen, nmp->nm_rsize); 1199 nfsm_mtouio(uiop, retlen); 1200 m_freem(mrep); 1201 tsiz -= retlen; 1202 if (v3) { 1203 if (eof || retlen == 0) 1204 tsiz = 0; 1205 } else if (retlen < len) 1206 tsiz = 0; 1207 } 1208 nfsmout: 1209 return (error); 1210 } 1211 1212 /* 1213 * dummy callback for mbuf. 1214 */ 1215 static void 1216 nfs_noop(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1217 { 1218 } 1219 1220 /* 1221 * nfs write call 1222 */ 1223 int 1224 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverf) 1225 struct vnode *vp; 1226 struct uio *uiop; 1227 int *iomode; 1228 boolean_t pageprotected; 1229 boolean_t *stalewriteverf; 1230 { 1231 u_int32_t *tl; 1232 caddr_t cp; 1233 int32_t t1, t2, backup; 1234 caddr_t bpos, dpos, cp2; 1235 struct mbuf *mreq, *mrep, *md, *mb; 1236 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1237 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1238 const int v3 = NFS_ISV3(vp); 1239 int committed = NFSV3WRITE_FILESYNC; 1240 struct nfsnode *np = VTONFS(vp); 1241 1242 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1243 panic("writerpc readonly vp %p", vp); 1244 } 1245 1246 #ifdef DIAGNOSTIC 1247 if (uiop->uio_iovcnt != 1) 1248 panic("nfs: writerpc iovcnt > 1"); 1249 #endif 1250 tsiz = uiop->uio_resid; 1251 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1252 return (EFBIG); 1253 while (tsiz > 0) { 1254 int datalen; 1255 1256 nfsstats.rpccnt[NFSPROC_WRITE]++; 1257 len = min(tsiz, nmp->nm_wsize); 1258 datalen = pageprotected ? 0 : nfsm_rndup(len); 1259 nfsm_reqhead(np, NFSPROC_WRITE, 1260 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1261 nfsm_fhtom(np, v3); 1262 if (v3) { 1263 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1264 txdr_hyper(uiop->uio_offset, tl); 1265 tl += 2; 1266 *tl++ = txdr_unsigned(len); 1267 *tl++ = txdr_unsigned(*iomode); 1268 *tl = txdr_unsigned(len); 1269 } else { 1270 u_int32_t x; 1271 1272 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1273 /* Set both "begin" and "current" to non-garbage. */ 1274 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1275 *tl++ = x; /* "begin offset" */ 1276 *tl++ = x; /* "current offset" */ 1277 x = txdr_unsigned(len); 1278 *tl++ = x; /* total to this offset */ 1279 *tl = x; /* size of this write */ 1280 1281 } 1282 if (pageprotected) { 1283 /* 1284 * since we know pages can't be modified during i/o, 1285 * no need to copy them for us. 1286 */ 1287 struct mbuf *m; 1288 struct iovec *iovp = uiop->uio_iov; 1289 1290 m = m_get(M_WAIT, MT_DATA); 1291 MCLAIM(m, &nfs_owner); 1292 MEXTADD(m, iovp->iov_base, len, M_MBUF, nfs_noop, NULL); 1293 m->m_flags |= M_EXT_ROMAP; 1294 m->m_len = len; 1295 mb->m_next = m; 1296 /* 1297 * no need to maintain mb and bpos here 1298 * because no one care them later. 1299 */ 1300 #if 0 1301 mb = m; 1302 bpos = mtod(caddr_t, mb) + mb->m_len; 1303 #endif 1304 iovp->iov_base = (char *)iovp->iov_base + len; 1305 iovp->iov_len -= len; 1306 uiop->uio_offset += len; 1307 uiop->uio_resid -= len; 1308 } else { 1309 nfsm_uiotom(uiop, len); 1310 } 1311 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, 1312 VTONFS(vp)->n_wcred); 1313 if (v3) { 1314 wccflag = NFSV3_WCCCHK; 1315 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1316 if (!error) { 1317 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1318 + NFSX_V3WRITEVERF); 1319 rlen = fxdr_unsigned(int, *tl++); 1320 if (rlen == 0) { 1321 error = NFSERR_IO; 1322 m_freem(mrep); 1323 break; 1324 } else if (rlen < len) { 1325 backup = len - rlen; 1326 uiop->uio_iov->iov_base = 1327 (caddr_t)uiop->uio_iov->iov_base - 1328 backup; 1329 uiop->uio_iov->iov_len += backup; 1330 uiop->uio_offset -= backup; 1331 uiop->uio_resid += backup; 1332 len = rlen; 1333 } 1334 commit = fxdr_unsigned(int, *tl++); 1335 1336 /* 1337 * Return the lowest committment level 1338 * obtained by any of the RPCs. 1339 */ 1340 if (committed == NFSV3WRITE_FILESYNC) 1341 committed = commit; 1342 else if (committed == NFSV3WRITE_DATASYNC && 1343 commit == NFSV3WRITE_UNSTABLE) 1344 committed = commit; 1345 simple_lock(&nmp->nm_slock); 1346 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1347 memcpy(nmp->nm_writeverf, tl, 1348 NFSX_V3WRITEVERF); 1349 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1350 } else if ((nmp->nm_iflag & 1351 NFSMNT_STALEWRITEVERF) || 1352 memcmp(tl, nmp->nm_writeverf, 1353 NFSX_V3WRITEVERF)) { 1354 *stalewriteverf = TRUE; 1355 memcpy(nmp->nm_writeverf, tl, 1356 NFSX_V3WRITEVERF); 1357 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 1358 } 1359 simple_unlock(&nmp->nm_slock); 1360 } 1361 } else 1362 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1363 if (wccflag) 1364 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1365 m_freem(mrep); 1366 if (error) 1367 break; 1368 tsiz -= len; 1369 } 1370 nfsmout: 1371 *iomode = committed; 1372 if (error) 1373 uiop->uio_resid = tsiz; 1374 return (error); 1375 } 1376 1377 /* 1378 * nfs mknod rpc 1379 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1380 * mode set to specify the file type and the size field for rdev. 1381 */ 1382 int 1383 nfs_mknodrpc(dvp, vpp, cnp, vap) 1384 struct vnode *dvp; 1385 struct vnode **vpp; 1386 struct componentname *cnp; 1387 struct vattr *vap; 1388 { 1389 struct nfsv2_sattr *sp; 1390 u_int32_t *tl; 1391 caddr_t cp; 1392 int32_t t1, t2; 1393 struct vnode *newvp = (struct vnode *)0; 1394 struct nfsnode *dnp, *np; 1395 char *cp2; 1396 caddr_t bpos, dpos; 1397 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1398 struct mbuf *mreq, *mrep, *md, *mb; 1399 u_int32_t rdev; 1400 const int v3 = NFS_ISV3(dvp); 1401 1402 if (vap->va_type == VCHR || vap->va_type == VBLK) 1403 rdev = txdr_unsigned(vap->va_rdev); 1404 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1405 rdev = nfs_xdrneg1; 1406 else { 1407 VOP_ABORTOP(dvp, cnp); 1408 vput(dvp); 1409 return (EOPNOTSUPP); 1410 } 1411 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1412 dnp = VTONFS(dvp); 1413 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1414 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1415 nfsm_fhtom(dnp, v3); 1416 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1417 if (v3) { 1418 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1419 *tl++ = vtonfsv3_type(vap->va_type); 1420 nfsm_v3attrbuild(vap, FALSE); 1421 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1422 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1423 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1424 *tl = txdr_unsigned(minor(vap->va_rdev)); 1425 } 1426 } else { 1427 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1428 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1429 sp->sa_uid = nfs_xdrneg1; 1430 sp->sa_gid = nfs_xdrneg1; 1431 sp->sa_size = rdev; 1432 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1433 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1434 } 1435 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1436 if (!error) { 1437 nfsm_mtofh(dvp, newvp, v3, gotvp); 1438 if (!gotvp) { 1439 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1440 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1441 if (!error) 1442 newvp = NFSTOV(np); 1443 } 1444 } 1445 if (v3) 1446 nfsm_wcc_data(dvp, wccflag, 0); 1447 nfsm_reqdone; 1448 if (error) { 1449 if (newvp) 1450 vput(newvp); 1451 } else { 1452 if (cnp->cn_flags & MAKEENTRY) 1453 cache_enter(dvp, newvp, cnp); 1454 *vpp = newvp; 1455 } 1456 PNBUF_PUT(cnp->cn_pnbuf); 1457 VTONFS(dvp)->n_flag |= NMODIFIED; 1458 if (!wccflag) 1459 VTONFS(dvp)->n_attrstamp = 0; 1460 vput(dvp); 1461 return (error); 1462 } 1463 1464 /* 1465 * nfs mknod vop 1466 * just call nfs_mknodrpc() to do the work. 1467 */ 1468 /* ARGSUSED */ 1469 int 1470 nfs_mknod(v) 1471 void *v; 1472 { 1473 struct vop_mknod_args /* { 1474 struct vnode *a_dvp; 1475 struct vnode **a_vpp; 1476 struct componentname *a_cnp; 1477 struct vattr *a_vap; 1478 } */ *ap = v; 1479 int error; 1480 1481 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1482 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1483 return (error); 1484 } 1485 1486 static u_long create_verf; 1487 /* 1488 * nfs file create call 1489 */ 1490 int 1491 nfs_create(v) 1492 void *v; 1493 { 1494 struct vop_create_args /* { 1495 struct vnode *a_dvp; 1496 struct vnode **a_vpp; 1497 struct componentname *a_cnp; 1498 struct vattr *a_vap; 1499 } */ *ap = v; 1500 struct vnode *dvp = ap->a_dvp; 1501 struct vattr *vap = ap->a_vap; 1502 struct componentname *cnp = ap->a_cnp; 1503 struct nfsv2_sattr *sp; 1504 u_int32_t *tl; 1505 caddr_t cp; 1506 int32_t t1, t2; 1507 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1508 struct vnode *newvp = (struct vnode *)0; 1509 caddr_t bpos, dpos, cp2; 1510 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1511 struct mbuf *mreq, *mrep, *md, *mb; 1512 const int v3 = NFS_ISV3(dvp); 1513 1514 /* 1515 * Oops, not for me.. 1516 */ 1517 if (vap->va_type == VSOCK) 1518 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1519 1520 #ifdef VA_EXCLUSIVE 1521 if (vap->va_vaflags & VA_EXCLUSIVE) 1522 fmode |= O_EXCL; 1523 #endif 1524 again: 1525 error = 0; 1526 nfsstats.rpccnt[NFSPROC_CREATE]++; 1527 dnp = VTONFS(dvp); 1528 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1529 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1530 nfsm_fhtom(dnp, v3); 1531 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1532 if (v3) { 1533 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1534 if (fmode & O_EXCL) { 1535 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1536 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1537 #ifdef INET 1538 if (TAILQ_FIRST(&in_ifaddr)) 1539 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1540 else 1541 *tl++ = create_verf; 1542 #else 1543 *tl++ = create_verf; 1544 #endif 1545 *tl = ++create_verf; 1546 } else { 1547 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1548 nfsm_v3attrbuild(vap, FALSE); 1549 } 1550 } else { 1551 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1552 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1553 sp->sa_uid = nfs_xdrneg1; 1554 sp->sa_gid = nfs_xdrneg1; 1555 sp->sa_size = 0; 1556 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1557 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1558 } 1559 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1560 if (!error) { 1561 nfsm_mtofh(dvp, newvp, v3, gotvp); 1562 if (!gotvp) { 1563 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1564 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1565 if (!error) 1566 newvp = NFSTOV(np); 1567 } 1568 } 1569 if (v3) 1570 nfsm_wcc_data(dvp, wccflag, 0); 1571 nfsm_reqdone; 1572 if (error) { 1573 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1574 fmode &= ~O_EXCL; 1575 goto again; 1576 } 1577 if (newvp) 1578 vput(newvp); 1579 } else if (v3 && (fmode & O_EXCL)) 1580 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1581 if (!error) { 1582 if (cnp->cn_flags & MAKEENTRY) 1583 cache_enter(dvp, newvp, cnp); 1584 *ap->a_vpp = newvp; 1585 } 1586 PNBUF_PUT(cnp->cn_pnbuf); 1587 VTONFS(dvp)->n_flag |= NMODIFIED; 1588 if (!wccflag) 1589 VTONFS(dvp)->n_attrstamp = 0; 1590 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1591 vput(dvp); 1592 return (error); 1593 } 1594 1595 /* 1596 * nfs file remove call 1597 * To try and make nfs semantics closer to ufs semantics, a file that has 1598 * other processes using the vnode is renamed instead of removed and then 1599 * removed later on the last close. 1600 * - If v_usecount > 1 1601 * If a rename is not already in the works 1602 * call nfs_sillyrename() to set it up 1603 * else 1604 * do the remove rpc 1605 */ 1606 int 1607 nfs_remove(v) 1608 void *v; 1609 { 1610 struct vop_remove_args /* { 1611 struct vnodeop_desc *a_desc; 1612 struct vnode * a_dvp; 1613 struct vnode * a_vp; 1614 struct componentname * a_cnp; 1615 } */ *ap = v; 1616 struct vnode *vp = ap->a_vp; 1617 struct vnode *dvp = ap->a_dvp; 1618 struct componentname *cnp = ap->a_cnp; 1619 struct nfsnode *np = VTONFS(vp); 1620 int error = 0; 1621 struct vattr vattr; 1622 1623 #ifndef DIAGNOSTIC 1624 if ((cnp->cn_flags & HASBUF) == 0) 1625 panic("nfs_remove: no name"); 1626 if (vp->v_usecount < 1) 1627 panic("nfs_remove: bad v_usecount"); 1628 #endif 1629 if (vp->v_type == VDIR) 1630 error = EPERM; 1631 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1632 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1633 vattr.va_nlink > 1)) { 1634 /* 1635 * Purge the name cache so that the chance of a lookup for 1636 * the name succeeding while the remove is in progress is 1637 * minimized. Without node locking it can still happen, such 1638 * that an I/O op returns ESTALE, but since you get this if 1639 * another host removes the file.. 1640 */ 1641 cache_purge(vp); 1642 /* 1643 * throw away biocache buffers, mainly to avoid 1644 * unnecessary delayed writes later. 1645 */ 1646 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1647 /* Do the rpc */ 1648 if (error != EINTR) 1649 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1650 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1651 /* 1652 * Kludge City: If the first reply to the remove rpc is lost.. 1653 * the reply to the retransmitted request will be ENOENT 1654 * since the file was in fact removed 1655 * Therefore, we cheat and return success. 1656 */ 1657 if (error == ENOENT) 1658 error = 0; 1659 } else if (!np->n_sillyrename) 1660 error = nfs_sillyrename(dvp, vp, cnp); 1661 PNBUF_PUT(cnp->cn_pnbuf); 1662 np->n_attrstamp = 0; 1663 VN_KNOTE(vp, NOTE_DELETE); 1664 VN_KNOTE(dvp, NOTE_WRITE); 1665 if (dvp == vp) 1666 vrele(vp); 1667 else 1668 vput(vp); 1669 vput(dvp); 1670 return (error); 1671 } 1672 1673 /* 1674 * nfs file remove rpc called from nfs_inactive 1675 */ 1676 int 1677 nfs_removeit(sp) 1678 struct sillyrename *sp; 1679 { 1680 1681 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1682 (struct proc *)0)); 1683 } 1684 1685 /* 1686 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1687 */ 1688 int 1689 nfs_removerpc(dvp, name, namelen, cred, proc) 1690 struct vnode *dvp; 1691 const char *name; 1692 int namelen; 1693 struct ucred *cred; 1694 struct proc *proc; 1695 { 1696 u_int32_t *tl; 1697 caddr_t cp; 1698 int32_t t1, t2; 1699 caddr_t bpos, dpos, cp2; 1700 int error = 0, wccflag = NFSV3_WCCRATTR; 1701 struct mbuf *mreq, *mrep, *md, *mb; 1702 const int v3 = NFS_ISV3(dvp); 1703 struct nfsnode *dnp = VTONFS(dvp); 1704 1705 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1706 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1707 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1708 nfsm_fhtom(dnp, v3); 1709 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1710 nfsm_request(dnp, NFSPROC_REMOVE, proc, cred); 1711 if (v3) 1712 nfsm_wcc_data(dvp, wccflag, 0); 1713 nfsm_reqdone; 1714 VTONFS(dvp)->n_flag |= NMODIFIED; 1715 if (!wccflag) 1716 VTONFS(dvp)->n_attrstamp = 0; 1717 return (error); 1718 } 1719 1720 /* 1721 * nfs file rename call 1722 */ 1723 int 1724 nfs_rename(v) 1725 void *v; 1726 { 1727 struct vop_rename_args /* { 1728 struct vnode *a_fdvp; 1729 struct vnode *a_fvp; 1730 struct componentname *a_fcnp; 1731 struct vnode *a_tdvp; 1732 struct vnode *a_tvp; 1733 struct componentname *a_tcnp; 1734 } */ *ap = v; 1735 struct vnode *fvp = ap->a_fvp; 1736 struct vnode *tvp = ap->a_tvp; 1737 struct vnode *fdvp = ap->a_fdvp; 1738 struct vnode *tdvp = ap->a_tdvp; 1739 struct componentname *tcnp = ap->a_tcnp; 1740 struct componentname *fcnp = ap->a_fcnp; 1741 int error; 1742 1743 #ifndef DIAGNOSTIC 1744 if ((tcnp->cn_flags & HASBUF) == 0 || 1745 (fcnp->cn_flags & HASBUF) == 0) 1746 panic("nfs_rename: no name"); 1747 #endif 1748 /* Check for cross-device rename */ 1749 if ((fvp->v_mount != tdvp->v_mount) || 1750 (tvp && (fvp->v_mount != tvp->v_mount))) { 1751 error = EXDEV; 1752 goto out; 1753 } 1754 1755 /* 1756 * If the tvp exists and is in use, sillyrename it before doing the 1757 * rename of the new file over it. 1758 */ 1759 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1760 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1761 VN_KNOTE(tvp, NOTE_DELETE); 1762 vput(tvp); 1763 tvp = NULL; 1764 } 1765 1766 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1767 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1768 tcnp->cn_proc); 1769 1770 VN_KNOTE(fdvp, NOTE_WRITE); 1771 VN_KNOTE(tdvp, NOTE_WRITE); 1772 if (fvp->v_type == VDIR) { 1773 if (tvp != NULL && tvp->v_type == VDIR) 1774 cache_purge(tdvp); 1775 cache_purge(fdvp); 1776 } 1777 out: 1778 if (tdvp == tvp) 1779 vrele(tdvp); 1780 else 1781 vput(tdvp); 1782 if (tvp) 1783 vput(tvp); 1784 vrele(fdvp); 1785 vrele(fvp); 1786 /* 1787 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1788 */ 1789 if (error == ENOENT) 1790 error = 0; 1791 return (error); 1792 } 1793 1794 /* 1795 * nfs file rename rpc called from nfs_remove() above 1796 */ 1797 int 1798 nfs_renameit(sdvp, scnp, sp) 1799 struct vnode *sdvp; 1800 struct componentname *scnp; 1801 struct sillyrename *sp; 1802 { 1803 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1804 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1805 } 1806 1807 /* 1808 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1809 */ 1810 int 1811 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1812 struct vnode *fdvp; 1813 const char *fnameptr; 1814 int fnamelen; 1815 struct vnode *tdvp; 1816 const char *tnameptr; 1817 int tnamelen; 1818 struct ucred *cred; 1819 struct proc *proc; 1820 { 1821 u_int32_t *tl; 1822 caddr_t cp; 1823 int32_t t1, t2; 1824 caddr_t bpos, dpos, cp2; 1825 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1826 struct mbuf *mreq, *mrep, *md, *mb; 1827 const int v3 = NFS_ISV3(fdvp); 1828 struct nfsnode *fdnp = VTONFS(fdvp); 1829 1830 nfsstats.rpccnt[NFSPROC_RENAME]++; 1831 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1832 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1833 nfsm_rndup(tnamelen)); 1834 nfsm_fhtom(fdnp, v3); 1835 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1836 nfsm_fhtom(VTONFS(tdvp), v3); 1837 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1838 nfsm_request(fdnp, NFSPROC_RENAME, proc, cred); 1839 if (v3) { 1840 nfsm_wcc_data(fdvp, fwccflag, 0); 1841 nfsm_wcc_data(tdvp, twccflag, 0); 1842 } 1843 nfsm_reqdone; 1844 VTONFS(fdvp)->n_flag |= NMODIFIED; 1845 VTONFS(tdvp)->n_flag |= NMODIFIED; 1846 if (!fwccflag) 1847 VTONFS(fdvp)->n_attrstamp = 0; 1848 if (!twccflag) 1849 VTONFS(tdvp)->n_attrstamp = 0; 1850 return (error); 1851 } 1852 1853 /* 1854 * nfs hard link create call 1855 */ 1856 int 1857 nfs_link(v) 1858 void *v; 1859 { 1860 struct vop_link_args /* { 1861 struct vnode *a_dvp; 1862 struct vnode *a_vp; 1863 struct componentname *a_cnp; 1864 } */ *ap = v; 1865 struct vnode *vp = ap->a_vp; 1866 struct vnode *dvp = ap->a_dvp; 1867 struct componentname *cnp = ap->a_cnp; 1868 u_int32_t *tl; 1869 caddr_t cp; 1870 int32_t t1, t2; 1871 caddr_t bpos, dpos, cp2; 1872 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1873 struct mbuf *mreq, *mrep, *md, *mb; 1874 /* XXX Should be const and initialised? */ 1875 int v3; 1876 struct nfsnode *np; 1877 1878 if (dvp->v_mount != vp->v_mount) { 1879 VOP_ABORTOP(dvp, cnp); 1880 vput(dvp); 1881 return (EXDEV); 1882 } 1883 if (dvp != vp) { 1884 error = vn_lock(vp, LK_EXCLUSIVE); 1885 if (error != 0) { 1886 VOP_ABORTOP(dvp, cnp); 1887 vput(dvp); 1888 return error; 1889 } 1890 } 1891 1892 /* 1893 * Push all writes to the server, so that the attribute cache 1894 * doesn't get "out of sync" with the server. 1895 * XXX There should be a better way! 1896 */ 1897 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1898 1899 v3 = NFS_ISV3(vp); 1900 nfsstats.rpccnt[NFSPROC_LINK]++; 1901 np = VTONFS(vp); 1902 nfsm_reqhead(np, NFSPROC_LINK, 1903 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1904 nfsm_fhtom(np, v3); 1905 nfsm_fhtom(VTONFS(dvp), v3); 1906 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1907 nfsm_request(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1908 if (v3) { 1909 nfsm_postop_attr(vp, attrflag, 0); 1910 nfsm_wcc_data(dvp, wccflag, 0); 1911 } 1912 nfsm_reqdone; 1913 PNBUF_PUT(cnp->cn_pnbuf); 1914 VTONFS(dvp)->n_flag |= NMODIFIED; 1915 if (!attrflag) 1916 VTONFS(vp)->n_attrstamp = 0; 1917 if (!wccflag) 1918 VTONFS(dvp)->n_attrstamp = 0; 1919 if (dvp != vp) 1920 VOP_UNLOCK(vp, 0); 1921 VN_KNOTE(vp, NOTE_LINK); 1922 VN_KNOTE(dvp, NOTE_WRITE); 1923 vput(dvp); 1924 /* 1925 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1926 */ 1927 if (error == EEXIST) 1928 error = 0; 1929 return (error); 1930 } 1931 1932 /* 1933 * nfs symbolic link create call 1934 */ 1935 int 1936 nfs_symlink(v) 1937 void *v; 1938 { 1939 struct vop_symlink_args /* { 1940 struct vnode *a_dvp; 1941 struct vnode **a_vpp; 1942 struct componentname *a_cnp; 1943 struct vattr *a_vap; 1944 char *a_target; 1945 } */ *ap = v; 1946 struct vnode *dvp = ap->a_dvp; 1947 struct vattr *vap = ap->a_vap; 1948 struct componentname *cnp = ap->a_cnp; 1949 struct nfsv2_sattr *sp; 1950 u_int32_t *tl; 1951 caddr_t cp; 1952 int32_t t1, t2; 1953 caddr_t bpos, dpos, cp2; 1954 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1955 struct mbuf *mreq, *mrep, *md, *mb; 1956 struct vnode *newvp = (struct vnode *)0; 1957 const int v3 = NFS_ISV3(dvp); 1958 struct nfsnode *dnp = VTONFS(dvp); 1959 1960 *ap->a_vpp = NULL; 1961 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1962 slen = strlen(ap->a_target); 1963 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1964 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1965 nfsm_fhtom(dnp, v3); 1966 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1967 if (v3) 1968 nfsm_v3attrbuild(vap, FALSE); 1969 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1970 if (!v3) { 1971 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1972 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1973 sp->sa_uid = nfs_xdrneg1; 1974 sp->sa_gid = nfs_xdrneg1; 1975 sp->sa_size = nfs_xdrneg1; 1976 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1977 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1978 } 1979 nfsm_request(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1980 if (v3) { 1981 if (!error) 1982 nfsm_mtofh(dvp, newvp, v3, gotvp); 1983 nfsm_wcc_data(dvp, wccflag, 0); 1984 } 1985 nfsm_reqdone; 1986 /* 1987 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1988 */ 1989 if (error == EEXIST) 1990 error = 0; 1991 if (error == 0 && newvp == NULL) { 1992 struct nfsnode *np = NULL; 1993 1994 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1995 cnp->cn_cred, cnp->cn_proc, &np); 1996 if (error == 0) 1997 newvp = NFSTOV(np); 1998 } 1999 if (error) { 2000 if (newvp != NULL) 2001 vput(newvp); 2002 } else { 2003 *ap->a_vpp = newvp; 2004 } 2005 PNBUF_PUT(cnp->cn_pnbuf); 2006 VTONFS(dvp)->n_flag |= NMODIFIED; 2007 if (!wccflag) 2008 VTONFS(dvp)->n_attrstamp = 0; 2009 VN_KNOTE(dvp, NOTE_WRITE); 2010 vput(dvp); 2011 return (error); 2012 } 2013 2014 /* 2015 * nfs make dir call 2016 */ 2017 int 2018 nfs_mkdir(v) 2019 void *v; 2020 { 2021 struct vop_mkdir_args /* { 2022 struct vnode *a_dvp; 2023 struct vnode **a_vpp; 2024 struct componentname *a_cnp; 2025 struct vattr *a_vap; 2026 } */ *ap = v; 2027 struct vnode *dvp = ap->a_dvp; 2028 struct vattr *vap = ap->a_vap; 2029 struct componentname *cnp = ap->a_cnp; 2030 struct nfsv2_sattr *sp; 2031 u_int32_t *tl; 2032 caddr_t cp; 2033 int32_t t1, t2; 2034 int len; 2035 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2036 struct vnode *newvp = (struct vnode *)0; 2037 caddr_t bpos, dpos, cp2; 2038 int error = 0, wccflag = NFSV3_WCCRATTR; 2039 int gotvp = 0; 2040 struct mbuf *mreq, *mrep, *md, *mb; 2041 const int v3 = NFS_ISV3(dvp); 2042 2043 len = cnp->cn_namelen; 2044 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2045 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2046 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2047 nfsm_fhtom(dnp, v3); 2048 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2049 if (v3) { 2050 nfsm_v3attrbuild(vap, FALSE); 2051 } else { 2052 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2053 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2054 sp->sa_uid = nfs_xdrneg1; 2055 sp->sa_gid = nfs_xdrneg1; 2056 sp->sa_size = nfs_xdrneg1; 2057 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2058 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2059 } 2060 nfsm_request(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 2061 if (!error) 2062 nfsm_mtofh(dvp, newvp, v3, gotvp); 2063 if (v3) 2064 nfsm_wcc_data(dvp, wccflag, 0); 2065 nfsm_reqdone; 2066 VTONFS(dvp)->n_flag |= NMODIFIED; 2067 if (!wccflag) 2068 VTONFS(dvp)->n_attrstamp = 0; 2069 /* 2070 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2071 * if we can succeed in looking up the directory. 2072 */ 2073 if (error == EEXIST || (!error && !gotvp)) { 2074 if (newvp) { 2075 vput(newvp); 2076 newvp = (struct vnode *)0; 2077 } 2078 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2079 cnp->cn_proc, &np); 2080 if (!error) { 2081 newvp = NFSTOV(np); 2082 if (newvp->v_type != VDIR) 2083 error = EEXIST; 2084 } 2085 } 2086 if (error) { 2087 if (newvp) 2088 vput(newvp); 2089 } else { 2090 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2091 if (cnp->cn_flags & MAKEENTRY) 2092 cache_enter(dvp, newvp, cnp); 2093 *ap->a_vpp = newvp; 2094 } 2095 PNBUF_PUT(cnp->cn_pnbuf); 2096 vput(dvp); 2097 return (error); 2098 } 2099 2100 /* 2101 * nfs remove directory call 2102 */ 2103 int 2104 nfs_rmdir(v) 2105 void *v; 2106 { 2107 struct vop_rmdir_args /* { 2108 struct vnode *a_dvp; 2109 struct vnode *a_vp; 2110 struct componentname *a_cnp; 2111 } */ *ap = v; 2112 struct vnode *vp = ap->a_vp; 2113 struct vnode *dvp = ap->a_dvp; 2114 struct componentname *cnp = ap->a_cnp; 2115 u_int32_t *tl; 2116 caddr_t cp; 2117 int32_t t1, t2; 2118 caddr_t bpos, dpos, cp2; 2119 int error = 0, wccflag = NFSV3_WCCRATTR; 2120 struct mbuf *mreq, *mrep, *md, *mb; 2121 const int v3 = NFS_ISV3(dvp); 2122 struct nfsnode *dnp; 2123 2124 if (dvp == vp) { 2125 vrele(dvp); 2126 vput(dvp); 2127 PNBUF_PUT(cnp->cn_pnbuf); 2128 return (EINVAL); 2129 } 2130 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2131 dnp = VTONFS(dvp); 2132 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2133 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2134 nfsm_fhtom(dnp, v3); 2135 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2136 nfsm_request(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2137 if (v3) 2138 nfsm_wcc_data(dvp, wccflag, 0); 2139 nfsm_reqdone; 2140 PNBUF_PUT(cnp->cn_pnbuf); 2141 VTONFS(dvp)->n_flag |= NMODIFIED; 2142 if (!wccflag) 2143 VTONFS(dvp)->n_attrstamp = 0; 2144 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2145 VN_KNOTE(vp, NOTE_DELETE); 2146 cache_purge(dvp); 2147 cache_purge(vp); 2148 vput(vp); 2149 vput(dvp); 2150 /* 2151 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2152 */ 2153 if (error == ENOENT) 2154 error = 0; 2155 return (error); 2156 } 2157 2158 /* 2159 * nfs readdir call 2160 */ 2161 int 2162 nfs_readdir(v) 2163 void *v; 2164 { 2165 struct vop_readdir_args /* { 2166 struct vnode *a_vp; 2167 struct uio *a_uio; 2168 struct ucred *a_cred; 2169 int *a_eofflag; 2170 off_t **a_cookies; 2171 int *a_ncookies; 2172 } */ *ap = v; 2173 struct vnode *vp = ap->a_vp; 2174 struct uio *uio = ap->a_uio; 2175 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2176 char *base = uio->uio_iov->iov_base; 2177 int tresid, error; 2178 size_t count, lost; 2179 struct dirent *dp; 2180 off_t *cookies = NULL; 2181 int ncookies = 0, nc; 2182 2183 if (vp->v_type != VDIR) 2184 return (EPERM); 2185 2186 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2187 count = uio->uio_resid - lost; 2188 if (count <= 0) 2189 return (EINVAL); 2190 2191 /* 2192 * Call nfs_bioread() to do the real work. 2193 */ 2194 tresid = uio->uio_resid = count; 2195 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2196 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2197 2198 if (!error && ap->a_cookies) { 2199 ncookies = count / 16; 2200 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2201 *ap->a_cookies = cookies; 2202 } 2203 2204 if (!error && uio->uio_resid == tresid) { 2205 uio->uio_resid += lost; 2206 nfsstats.direofcache_misses++; 2207 if (ap->a_cookies) 2208 *ap->a_ncookies = 0; 2209 *ap->a_eofflag = 1; 2210 return (0); 2211 } 2212 2213 if (!error && ap->a_cookies) { 2214 /* 2215 * Only the NFS server and emulations use cookies, and they 2216 * load the directory block into system space, so we can 2217 * just look at it directly. 2218 */ 2219 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2220 panic("nfs_readdir: lost in space"); 2221 for (nc = 0; ncookies-- && 2222 base < (char *)uio->uio_iov->iov_base; nc++){ 2223 dp = (struct dirent *) base; 2224 if (dp->d_reclen == 0) 2225 break; 2226 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2227 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2228 else 2229 *(cookies++) = NFS_GETCOOKIE(dp); 2230 base += dp->d_reclen; 2231 } 2232 uio->uio_resid += 2233 ((caddr_t)uio->uio_iov->iov_base - base); 2234 uio->uio_iov->iov_len += 2235 ((caddr_t)uio->uio_iov->iov_base - base); 2236 uio->uio_iov->iov_base = base; 2237 *ap->a_ncookies = nc; 2238 } 2239 2240 uio->uio_resid += lost; 2241 *ap->a_eofflag = 0; 2242 return (error); 2243 } 2244 2245 /* 2246 * Readdir rpc call. 2247 * Called from below the buffer cache by nfs_doio(). 2248 */ 2249 int 2250 nfs_readdirrpc(vp, uiop, cred) 2251 struct vnode *vp; 2252 struct uio *uiop; 2253 struct ucred *cred; 2254 { 2255 int len, left; 2256 struct dirent *dp = NULL; 2257 u_int32_t *tl; 2258 caddr_t cp; 2259 int32_t t1, t2; 2260 caddr_t bpos, dpos, cp2; 2261 struct mbuf *mreq, *mrep, *md, *mb; 2262 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2263 struct nfsnode *dnp = VTONFS(vp); 2264 u_quad_t fileno; 2265 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2266 int attrflag, nrpcs = 0, reclen; 2267 const int v3 = NFS_ISV3(vp); 2268 2269 #ifdef DIAGNOSTIC 2270 /* 2271 * Should be called from buffer cache, so only amount of 2272 * NFS_DIRBLKSIZ will be requested. 2273 */ 2274 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2275 panic("nfs readdirrpc bad uio"); 2276 #endif 2277 2278 /* 2279 * Loop around doing readdir rpc's of size nm_readdirsize 2280 * truncated to a multiple of NFS_DIRFRAGSIZ. 2281 * The stopping criteria is EOF or buffer full. 2282 */ 2283 while (more_dirs && bigenough) { 2284 /* 2285 * Heuristic: don't bother to do another RPC to further 2286 * fill up this block if there is not much room left. (< 50% 2287 * of the readdir RPC size). This wastes some buffer space 2288 * but can save up to 50% in RPC calls. 2289 */ 2290 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2291 bigenough = 0; 2292 break; 2293 } 2294 nfsstats.rpccnt[NFSPROC_READDIR]++; 2295 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2296 NFSX_READDIR(v3)); 2297 nfsm_fhtom(dnp, v3); 2298 if (v3) { 2299 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2300 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2301 txdr_swapcookie3(uiop->uio_offset, tl); 2302 } else { 2303 txdr_cookie3(uiop->uio_offset, tl); 2304 } 2305 tl += 2; 2306 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2307 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2308 } else { 2309 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2310 *tl++ = txdr_unsigned(uiop->uio_offset); 2311 } 2312 *tl = txdr_unsigned(nmp->nm_readdirsize); 2313 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2314 nrpcs++; 2315 if (v3) { 2316 nfsm_postop_attr(vp, attrflag, 0); 2317 if (!error) { 2318 nfsm_dissect(tl, u_int32_t *, 2319 2 * NFSX_UNSIGNED); 2320 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2321 dnp->n_cookieverf.nfsuquad[1] = *tl; 2322 } else { 2323 m_freem(mrep); 2324 goto nfsmout; 2325 } 2326 } 2327 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2328 more_dirs = fxdr_unsigned(int, *tl); 2329 2330 /* loop thru the dir entries, doctoring them to 4bsd form */ 2331 while (more_dirs && bigenough) { 2332 if (v3) { 2333 nfsm_dissect(tl, u_int32_t *, 2334 3 * NFSX_UNSIGNED); 2335 fileno = fxdr_hyper(tl); 2336 len = fxdr_unsigned(int, *(tl + 2)); 2337 } else { 2338 nfsm_dissect(tl, u_int32_t *, 2339 2 * NFSX_UNSIGNED); 2340 fileno = fxdr_unsigned(u_quad_t, *tl++); 2341 len = fxdr_unsigned(int, *tl); 2342 } 2343 if (len <= 0 || len > NFS_MAXNAMLEN) { 2344 error = EBADRPC; 2345 m_freem(mrep); 2346 goto nfsmout; 2347 } 2348 tlen = nfsm_rndup(len); 2349 if (tlen == len) 2350 tlen += 4; /* To ensure null termination */ 2351 tlen += sizeof (off_t) + sizeof (int); 2352 reclen = ALIGN(tlen + DIRHDSIZ); 2353 tlen = reclen - DIRHDSIZ; 2354 left = NFS_DIRFRAGSIZ - blksiz; 2355 if (reclen > left) { 2356 dp->d_reclen += left; 2357 uiop->uio_iov->iov_base = 2358 (caddr_t)uiop->uio_iov->iov_base + left; 2359 uiop->uio_iov->iov_len -= left; 2360 uiop->uio_resid -= left; 2361 blksiz = 0; 2362 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2363 } 2364 if (reclen > uiop->uio_resid) 2365 bigenough = 0; 2366 if (bigenough) { 2367 dp = (struct dirent *)uiop->uio_iov->iov_base; 2368 dp->d_fileno = (int)fileno; 2369 dp->d_namlen = len; 2370 dp->d_reclen = reclen; 2371 dp->d_type = DT_UNKNOWN; 2372 blksiz += dp->d_reclen; 2373 if (blksiz == NFS_DIRFRAGSIZ) 2374 blksiz = 0; 2375 uiop->uio_resid -= DIRHDSIZ; 2376 uiop->uio_iov->iov_base = 2377 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2378 uiop->uio_iov->iov_len -= DIRHDSIZ; 2379 nfsm_mtouio(uiop, len); 2380 cp = uiop->uio_iov->iov_base; 2381 tlen -= len; 2382 *cp = '\0'; /* null terminate */ 2383 uiop->uio_iov->iov_base = 2384 (caddr_t)uiop->uio_iov->iov_base + tlen; 2385 uiop->uio_iov->iov_len -= tlen; 2386 uiop->uio_resid -= tlen; 2387 } else 2388 nfsm_adv(nfsm_rndup(len)); 2389 if (v3) { 2390 nfsm_dissect(tl, u_int32_t *, 2391 3 * NFSX_UNSIGNED); 2392 } else { 2393 nfsm_dissect(tl, u_int32_t *, 2394 2 * NFSX_UNSIGNED); 2395 } 2396 if (bigenough) { 2397 if (v3) { 2398 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2399 uiop->uio_offset = 2400 fxdr_swapcookie3(tl); 2401 else 2402 uiop->uio_offset = 2403 fxdr_cookie3(tl); 2404 } 2405 else { 2406 uiop->uio_offset = 2407 fxdr_unsigned(off_t, *tl); 2408 } 2409 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2410 } 2411 if (v3) 2412 tl += 2; 2413 else 2414 tl++; 2415 more_dirs = fxdr_unsigned(int, *tl); 2416 } 2417 /* 2418 * If at end of rpc data, get the eof boolean 2419 */ 2420 if (!more_dirs) { 2421 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2422 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2423 } 2424 m_freem(mrep); 2425 } 2426 /* 2427 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2428 * by increasing d_reclen for the last record. 2429 */ 2430 if (blksiz > 0) { 2431 left = NFS_DIRFRAGSIZ - blksiz; 2432 dp->d_reclen += left; 2433 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2434 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2435 left; 2436 uiop->uio_iov->iov_len -= left; 2437 uiop->uio_resid -= left; 2438 } 2439 2440 /* 2441 * We are now either at the end of the directory or have filled the 2442 * block. 2443 */ 2444 if (bigenough) 2445 dnp->n_direofoffset = uiop->uio_offset; 2446 nfsmout: 2447 return (error); 2448 } 2449 2450 /* 2451 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2452 */ 2453 int 2454 nfs_readdirplusrpc(vp, uiop, cred) 2455 struct vnode *vp; 2456 struct uio *uiop; 2457 struct ucred *cred; 2458 { 2459 int len, left; 2460 struct dirent *dp = NULL; 2461 u_int32_t *tl; 2462 caddr_t cp; 2463 int32_t t1, t2; 2464 struct vnode *newvp; 2465 caddr_t bpos, dpos, cp2; 2466 struct mbuf *mreq, *mrep, *md, *mb; 2467 struct nameidata nami, *ndp = &nami; 2468 struct componentname *cnp = &ndp->ni_cnd; 2469 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2470 struct nfsnode *dnp = VTONFS(vp), *np; 2471 nfsfh_t *fhp; 2472 u_quad_t fileno; 2473 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2474 int attrflag, fhsize, nrpcs = 0, reclen; 2475 struct nfs_fattr fattr, *fp; 2476 2477 #ifdef DIAGNOSTIC 2478 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2479 panic("nfs readdirplusrpc bad uio"); 2480 #endif 2481 ndp->ni_dvp = vp; 2482 newvp = NULLVP; 2483 2484 /* 2485 * Loop around doing readdir rpc's of size nm_readdirsize 2486 * truncated to a multiple of NFS_DIRFRAGSIZ. 2487 * The stopping criteria is EOF or buffer full. 2488 */ 2489 while (more_dirs && bigenough) { 2490 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2491 bigenough = 0; 2492 break; 2493 } 2494 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2495 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2496 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2497 nfsm_fhtom(dnp, 1); 2498 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2499 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2500 txdr_swapcookie3(uiop->uio_offset, tl); 2501 } else { 2502 txdr_cookie3(uiop->uio_offset, tl); 2503 } 2504 tl += 2; 2505 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2506 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2507 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2508 *tl = txdr_unsigned(nmp->nm_rsize); 2509 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2510 nfsm_postop_attr(vp, attrflag, 0); 2511 if (error) { 2512 m_freem(mrep); 2513 goto nfsmout; 2514 } 2515 nrpcs++; 2516 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2517 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2518 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2519 more_dirs = fxdr_unsigned(int, *tl); 2520 2521 /* loop thru the dir entries, doctoring them to 4bsd form */ 2522 while (more_dirs && bigenough) { 2523 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2524 fileno = fxdr_hyper(tl); 2525 len = fxdr_unsigned(int, *(tl + 2)); 2526 if (len <= 0 || len > NFS_MAXNAMLEN) { 2527 error = EBADRPC; 2528 m_freem(mrep); 2529 goto nfsmout; 2530 } 2531 tlen = nfsm_rndup(len); 2532 if (tlen == len) 2533 tlen += 4; /* To ensure null termination*/ 2534 tlen += sizeof (off_t) + sizeof (int); 2535 reclen = ALIGN(tlen + DIRHDSIZ); 2536 tlen = reclen - DIRHDSIZ; 2537 left = NFS_DIRFRAGSIZ - blksiz; 2538 if (reclen > left) { 2539 /* 2540 * DIRFRAGSIZ is aligned, no need to align 2541 * again here. 2542 */ 2543 dp->d_reclen += left; 2544 uiop->uio_iov->iov_base = 2545 (caddr_t)uiop->uio_iov->iov_base + left; 2546 uiop->uio_iov->iov_len -= left; 2547 uiop->uio_resid -= left; 2548 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2549 blksiz = 0; 2550 } 2551 if (reclen > uiop->uio_resid) 2552 bigenough = 0; 2553 if (bigenough) { 2554 dp = (struct dirent *)uiop->uio_iov->iov_base; 2555 dp->d_fileno = (int)fileno; 2556 dp->d_namlen = len; 2557 dp->d_reclen = reclen; 2558 dp->d_type = DT_UNKNOWN; 2559 blksiz += dp->d_reclen; 2560 if (blksiz == NFS_DIRFRAGSIZ) 2561 blksiz = 0; 2562 uiop->uio_resid -= DIRHDSIZ; 2563 uiop->uio_iov->iov_base = 2564 (caddr_t)uiop->uio_iov->iov_base + 2565 DIRHDSIZ; 2566 uiop->uio_iov->iov_len -= DIRHDSIZ; 2567 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2568 cnp->cn_namelen = len; 2569 nfsm_mtouio(uiop, len); 2570 cp = uiop->uio_iov->iov_base; 2571 tlen -= len; 2572 *cp = '\0'; 2573 uiop->uio_iov->iov_base = 2574 (caddr_t)uiop->uio_iov->iov_base + tlen; 2575 uiop->uio_iov->iov_len -= tlen; 2576 uiop->uio_resid -= tlen; 2577 } else 2578 nfsm_adv(nfsm_rndup(len)); 2579 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2580 if (bigenough) { 2581 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2582 uiop->uio_offset = 2583 fxdr_swapcookie3(tl); 2584 else 2585 uiop->uio_offset = 2586 fxdr_cookie3(tl); 2587 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2588 } 2589 tl += 2; 2590 2591 /* 2592 * Since the attributes are before the file handle 2593 * (sigh), we must skip over the attributes and then 2594 * come back and get them. 2595 */ 2596 attrflag = fxdr_unsigned(int, *tl); 2597 if (attrflag) { 2598 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2599 memcpy(&fattr, fp, NFSX_V3FATTR); 2600 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2601 doit = fxdr_unsigned(int, *tl); 2602 if (doit) { 2603 nfsm_getfh(fhp, fhsize, 1); 2604 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2605 VREF(vp); 2606 newvp = vp; 2607 np = dnp; 2608 } else { 2609 error = nfs_nget(vp->v_mount, fhp, 2610 fhsize, &np); 2611 if (!error) 2612 newvp = NFSTOV(np); 2613 } 2614 if (!error) { 2615 const char *cp; 2616 2617 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2618 dp->d_type = 2619 IFTODT(VTTOIF(np->n_vattr->va_type)); 2620 ndp->ni_vp = newvp; 2621 cp = cnp->cn_nameptr + cnp->cn_namelen; 2622 cnp->cn_hash = 2623 namei_hash(cnp->cn_nameptr, &cp); 2624 if (cnp->cn_namelen <= NCHNAMLEN) 2625 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2626 cnp); 2627 } 2628 } 2629 } else { 2630 /* Just skip over the file handle */ 2631 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2632 i = fxdr_unsigned(int, *tl); 2633 nfsm_adv(nfsm_rndup(i)); 2634 } 2635 if (newvp != NULLVP) { 2636 if (newvp == vp) 2637 vrele(newvp); 2638 else 2639 vput(newvp); 2640 newvp = NULLVP; 2641 } 2642 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2643 more_dirs = fxdr_unsigned(int, *tl); 2644 } 2645 /* 2646 * If at end of rpc data, get the eof boolean 2647 */ 2648 if (!more_dirs) { 2649 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2650 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2651 } 2652 m_freem(mrep); 2653 } 2654 /* 2655 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2656 * by increasing d_reclen for the last record. 2657 */ 2658 if (blksiz > 0) { 2659 left = NFS_DIRFRAGSIZ - blksiz; 2660 dp->d_reclen += left; 2661 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2662 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2663 left; 2664 uiop->uio_iov->iov_len -= left; 2665 uiop->uio_resid -= left; 2666 } 2667 2668 /* 2669 * We are now either at the end of the directory or have filled the 2670 * block. 2671 */ 2672 if (bigenough) 2673 dnp->n_direofoffset = uiop->uio_offset; 2674 nfsmout: 2675 if (newvp != NULLVP) { 2676 if(newvp == vp) 2677 vrele(newvp); 2678 else 2679 vput(newvp); 2680 } 2681 return (error); 2682 } 2683 static char hextoasc[] = "0123456789abcdef"; 2684 2685 /* 2686 * Silly rename. To make the NFS filesystem that is stateless look a little 2687 * more like the "ufs" a remove of an active vnode is translated to a rename 2688 * to a funny looking filename that is removed by nfs_inactive on the 2689 * nfsnode. There is the potential for another process on a different client 2690 * to create the same funny name between the nfs_lookitup() fails and the 2691 * nfs_rename() completes, but... 2692 */ 2693 int 2694 nfs_sillyrename(dvp, vp, cnp) 2695 struct vnode *dvp, *vp; 2696 struct componentname *cnp; 2697 { 2698 struct sillyrename *sp; 2699 struct nfsnode *np; 2700 int error; 2701 short pid; 2702 2703 cache_purge(dvp); 2704 np = VTONFS(vp); 2705 #ifndef DIAGNOSTIC 2706 if (vp->v_type == VDIR) 2707 panic("nfs: sillyrename dir"); 2708 #endif 2709 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2710 M_NFSREQ, M_WAITOK); 2711 sp->s_cred = crdup(cnp->cn_cred); 2712 sp->s_dvp = dvp; 2713 VREF(dvp); 2714 2715 /* Fudge together a funny name */ 2716 pid = cnp->cn_proc->p_pid; 2717 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2718 sp->s_namlen = 12; 2719 sp->s_name[8] = hextoasc[pid & 0xf]; 2720 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2721 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2722 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2723 2724 /* Try lookitups until we get one that isn't there */ 2725 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2726 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2727 sp->s_name[4]++; 2728 if (sp->s_name[4] > 'z') { 2729 error = EINVAL; 2730 goto bad; 2731 } 2732 } 2733 error = nfs_renameit(dvp, cnp, sp); 2734 if (error) 2735 goto bad; 2736 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2737 cnp->cn_proc, &np); 2738 np->n_sillyrename = sp; 2739 return (0); 2740 bad: 2741 vrele(sp->s_dvp); 2742 crfree(sp->s_cred); 2743 free((caddr_t)sp, M_NFSREQ); 2744 return (error); 2745 } 2746 2747 /* 2748 * Look up a file name and optionally either update the file handle or 2749 * allocate an nfsnode, depending on the value of npp. 2750 * npp == NULL --> just do the lookup 2751 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2752 * handled too 2753 * *npp != NULL --> update the file handle in the vnode 2754 */ 2755 int 2756 nfs_lookitup(dvp, name, len, cred, procp, npp) 2757 struct vnode *dvp; 2758 const char *name; 2759 int len; 2760 struct ucred *cred; 2761 struct proc *procp; 2762 struct nfsnode **npp; 2763 { 2764 u_int32_t *tl; 2765 caddr_t cp; 2766 int32_t t1, t2; 2767 struct vnode *newvp = (struct vnode *)0; 2768 struct nfsnode *np, *dnp = VTONFS(dvp); 2769 caddr_t bpos, dpos, cp2; 2770 int error = 0, fhlen, attrflag; 2771 struct mbuf *mreq, *mrep, *md, *mb; 2772 nfsfh_t *nfhp; 2773 const int v3 = NFS_ISV3(dvp); 2774 2775 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2776 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2777 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2778 nfsm_fhtom(dnp, v3); 2779 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2780 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2781 if (npp && !error) { 2782 nfsm_getfh(nfhp, fhlen, v3); 2783 if (*npp) { 2784 np = *npp; 2785 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2786 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2787 np->n_fhp = &np->n_fh; 2788 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2789 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2790 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2791 np->n_fhsize = fhlen; 2792 newvp = NFSTOV(np); 2793 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2794 VREF(dvp); 2795 newvp = dvp; 2796 } else { 2797 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2798 if (error) { 2799 m_freem(mrep); 2800 return (error); 2801 } 2802 newvp = NFSTOV(np); 2803 } 2804 if (v3) { 2805 nfsm_postop_attr(newvp, attrflag, 0); 2806 if (!attrflag && *npp == NULL) { 2807 m_freem(mrep); 2808 vput(newvp); 2809 return (ENOENT); 2810 } 2811 } else 2812 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2813 } 2814 nfsm_reqdone; 2815 if (npp && *npp == NULL) { 2816 if (error) { 2817 if (newvp) 2818 vput(newvp); 2819 } else 2820 *npp = np; 2821 } 2822 return (error); 2823 } 2824 2825 /* 2826 * Nfs Version 3 commit rpc 2827 */ 2828 int 2829 nfs_commit(vp, offset, cnt, procp) 2830 struct vnode *vp; 2831 off_t offset; 2832 uint32_t cnt; 2833 struct proc *procp; 2834 { 2835 caddr_t cp; 2836 u_int32_t *tl; 2837 int32_t t1, t2; 2838 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2839 caddr_t bpos, dpos, cp2; 2840 int error = 0, wccflag = NFSV3_WCCRATTR; 2841 struct mbuf *mreq, *mrep, *md, *mb; 2842 struct nfsnode *np; 2843 2844 KASSERT(NFS_ISV3(vp)); 2845 2846 #ifdef NFS_DEBUG_COMMIT 2847 printf("commit %lu - %lu\n", (unsigned long)offset, 2848 (unsigned long)(offset + cnt)); 2849 #endif 2850 2851 simple_lock(&nmp->nm_slock); 2852 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 2853 simple_unlock(&nmp->nm_slock); 2854 return (0); 2855 } 2856 simple_unlock(&nmp->nm_slock); 2857 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2858 np = VTONFS(vp); 2859 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 2860 nfsm_fhtom(np, 1); 2861 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2862 txdr_hyper(offset, tl); 2863 tl += 2; 2864 *tl = txdr_unsigned(cnt); 2865 nfsm_request(np, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2866 nfsm_wcc_data(vp, wccflag, 0); 2867 if (!error) { 2868 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2869 simple_lock(&nmp->nm_slock); 2870 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 2871 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 2872 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 2873 error = NFSERR_STALEWRITEVERF; 2874 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 2875 } 2876 simple_unlock(&nmp->nm_slock); 2877 } 2878 nfsm_reqdone; 2879 return (error); 2880 } 2881 2882 /* 2883 * Kludge City.. 2884 * - make nfs_bmap() essentially a no-op that does no translation 2885 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2886 * (Maybe I could use the process's page mapping, but I was concerned that 2887 * Kernel Write might not be enabled and also figured copyout() would do 2888 * a lot more work than memcpy() and also it currently happens in the 2889 * context of the swapper process (2). 2890 */ 2891 int 2892 nfs_bmap(v) 2893 void *v; 2894 { 2895 struct vop_bmap_args /* { 2896 struct vnode *a_vp; 2897 daddr_t a_bn; 2898 struct vnode **a_vpp; 2899 daddr_t *a_bnp; 2900 int *a_runp; 2901 } */ *ap = v; 2902 struct vnode *vp = ap->a_vp; 2903 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2904 2905 if (ap->a_vpp != NULL) 2906 *ap->a_vpp = vp; 2907 if (ap->a_bnp != NULL) 2908 *ap->a_bnp = ap->a_bn << bshift; 2909 if (ap->a_runp != NULL) 2910 *ap->a_runp = 1024 * 1024; /* XXX */ 2911 return (0); 2912 } 2913 2914 /* 2915 * Strategy routine. 2916 * For async requests when nfsiod(s) are running, queue the request by 2917 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2918 * request. 2919 */ 2920 int 2921 nfs_strategy(v) 2922 void *v; 2923 { 2924 struct vop_strategy_args *ap = v; 2925 struct buf *bp = ap->a_bp; 2926 struct proc *p; 2927 int error = 0; 2928 2929 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2930 panic("nfs physio/async"); 2931 if (bp->b_flags & B_ASYNC) 2932 p = NULL; 2933 else 2934 p = curproc; /* XXX */ 2935 2936 /* 2937 * If the op is asynchronous and an i/o daemon is waiting 2938 * queue the request, wake it up and wait for completion 2939 * otherwise just do it ourselves. 2940 */ 2941 2942 if ((bp->b_flags & B_ASYNC) == 0 || 2943 nfs_asyncio(bp)) 2944 error = nfs_doio(bp, p); 2945 return (error); 2946 } 2947 2948 /* 2949 * fsync vnode op. Just call nfs_flush() with commit == 1. 2950 */ 2951 /* ARGSUSED */ 2952 int 2953 nfs_fsync(v) 2954 void *v; 2955 { 2956 struct vop_fsync_args /* { 2957 struct vnodeop_desc *a_desc; 2958 struct vnode * a_vp; 2959 struct ucred * a_cred; 2960 int a_flags; 2961 off_t offlo; 2962 off_t offhi; 2963 struct proc * a_p; 2964 } */ *ap = v; 2965 2966 return (nfs_flush(ap->a_vp, ap->a_cred, 2967 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2968 } 2969 2970 /* 2971 * Flush all the data associated with a vnode. 2972 */ 2973 int 2974 nfs_flush(vp, cred, waitfor, p, commit) 2975 struct vnode *vp; 2976 struct ucred *cred; 2977 int waitfor; 2978 struct proc *p; 2979 int commit; 2980 { 2981 struct nfsnode *np = VTONFS(vp); 2982 int error; 2983 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2984 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2985 2986 simple_lock(&vp->v_interlock); 2987 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2988 if (np->n_flag & NWRITEERR) { 2989 error = np->n_error; 2990 np->n_flag &= ~NWRITEERR; 2991 } 2992 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2993 return (error); 2994 } 2995 2996 /* 2997 * Return POSIX pathconf information applicable to nfs. 2998 * 2999 * N.B. The NFS V2 protocol doesn't support this RPC. 3000 */ 3001 /* ARGSUSED */ 3002 int 3003 nfs_pathconf(v) 3004 void *v; 3005 { 3006 struct vop_pathconf_args /* { 3007 struct vnode *a_vp; 3008 int a_name; 3009 register_t *a_retval; 3010 } */ *ap = v; 3011 struct nfsv3_pathconf *pcp; 3012 struct vnode *vp = ap->a_vp; 3013 struct mbuf *mreq, *mrep, *md, *mb; 3014 int32_t t1, t2; 3015 u_int32_t *tl; 3016 caddr_t bpos, dpos, cp, cp2; 3017 int error = 0, attrflag; 3018 #ifndef NFS_V2_ONLY 3019 struct nfsmount *nmp; 3020 unsigned int l; 3021 u_int64_t maxsize; 3022 #endif 3023 const int v3 = NFS_ISV3(vp); 3024 struct nfsnode *np = VTONFS(vp); 3025 3026 switch (ap->a_name) { 3027 /* Names that can be resolved locally. */ 3028 case _PC_PIPE_BUF: 3029 *ap->a_retval = PIPE_BUF; 3030 break; 3031 case _PC_SYNC_IO: 3032 *ap->a_retval = 1; 3033 break; 3034 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3035 case _PC_LINK_MAX: 3036 case _PC_NAME_MAX: 3037 case _PC_CHOWN_RESTRICTED: 3038 case _PC_NO_TRUNC: 3039 if (!v3) { 3040 error = EINVAL; 3041 break; 3042 } 3043 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3044 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3045 nfsm_fhtom(np, 1); 3046 nfsm_request(np, NFSPROC_PATHCONF, 3047 curproc, curproc->p_ucred); /* XXX */ 3048 nfsm_postop_attr(vp, attrflag, 0); 3049 if (!error) { 3050 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3051 NFSX_V3PATHCONF); 3052 switch (ap->a_name) { 3053 case _PC_LINK_MAX: 3054 *ap->a_retval = 3055 fxdr_unsigned(register_t, pcp->pc_linkmax); 3056 break; 3057 case _PC_NAME_MAX: 3058 *ap->a_retval = 3059 fxdr_unsigned(register_t, pcp->pc_namemax); 3060 break; 3061 case _PC_CHOWN_RESTRICTED: 3062 *ap->a_retval = 3063 (pcp->pc_chownrestricted == nfs_true); 3064 break; 3065 case _PC_NO_TRUNC: 3066 *ap->a_retval = 3067 (pcp->pc_notrunc == nfs_true); 3068 break; 3069 } 3070 } 3071 nfsm_reqdone; 3072 break; 3073 case _PC_FILESIZEBITS: 3074 #ifndef NFS_V2_ONLY 3075 if (v3) { 3076 nmp = VFSTONFS(vp->v_mount); 3077 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3078 if ((error = nfs_fsinfo(nmp, vp, 3079 curproc->p_ucred, curproc)) != 0) /* XXX */ 3080 break; 3081 for (l = 0, maxsize = nmp->nm_maxfilesize; 3082 (maxsize >> l) > 0; l++) 3083 ; 3084 *ap->a_retval = l + 1; 3085 } else 3086 #endif 3087 { 3088 *ap->a_retval = 32; /* NFS V2 limitation */ 3089 } 3090 break; 3091 default: 3092 error = EINVAL; 3093 break; 3094 } 3095 3096 return (error); 3097 } 3098 3099 /* 3100 * NFS advisory byte-level locks. 3101 */ 3102 int 3103 nfs_advlock(v) 3104 void *v; 3105 { 3106 struct vop_advlock_args /* { 3107 struct vnode *a_vp; 3108 caddr_t a_id; 3109 int a_op; 3110 struct flock *a_fl; 3111 int a_flags; 3112 } */ *ap = v; 3113 struct nfsnode *np = VTONFS(ap->a_vp); 3114 3115 return lf_advlock(ap, &np->n_lockf, np->n_size); 3116 } 3117 3118 /* 3119 * Print out the contents of an nfsnode. 3120 */ 3121 int 3122 nfs_print(v) 3123 void *v; 3124 { 3125 struct vop_print_args /* { 3126 struct vnode *a_vp; 3127 } */ *ap = v; 3128 struct vnode *vp = ap->a_vp; 3129 struct nfsnode *np = VTONFS(vp); 3130 3131 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3132 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3133 if (vp->v_type == VFIFO) 3134 fifo_printinfo(vp); 3135 printf("\n"); 3136 return (0); 3137 } 3138 3139 /* 3140 * NFS file truncation. 3141 */ 3142 int 3143 nfs_truncate(v) 3144 void *v; 3145 { 3146 #if 0 3147 struct vop_truncate_args /* { 3148 struct vnode *a_vp; 3149 off_t a_length; 3150 int a_flags; 3151 struct ucred *a_cred; 3152 struct proc *a_p; 3153 } */ *ap = v; 3154 #endif 3155 3156 /* Use nfs_setattr */ 3157 return (EOPNOTSUPP); 3158 } 3159 3160 /* 3161 * NFS update. 3162 */ 3163 int 3164 nfs_update(v) 3165 void *v; 3166 #if 0 3167 struct vop_update_args /* { 3168 struct vnode *a_vp; 3169 struct timespec *a_ta; 3170 struct timespec *a_tm; 3171 int a_waitfor; 3172 } */ *ap = v; 3173 #endif 3174 { 3175 3176 /* Use nfs_setattr */ 3177 return (EOPNOTSUPP); 3178 } 3179 3180 /* 3181 * Just call bwrite(). 3182 */ 3183 int 3184 nfs_bwrite(v) 3185 void *v; 3186 { 3187 struct vop_bwrite_args /* { 3188 struct vnode *a_bp; 3189 } */ *ap = v; 3190 3191 return (bwrite(ap->a_bp)); 3192 } 3193 3194 /* 3195 * nfs unlock wrapper. 3196 */ 3197 int 3198 nfs_unlock(void *v) 3199 { 3200 struct vop_unlock_args /* { 3201 struct vnode *a_vp; 3202 int a_flags; 3203 } */ *ap = v; 3204 struct vnode *vp = ap->a_vp; 3205 3206 /* 3207 * VOP_UNLOCK can be called by nfs_loadattrcache 3208 * with v_data == 0. 3209 */ 3210 if (VTONFS(vp)) { 3211 nfs_delayedtruncate(vp); 3212 } 3213 3214 return genfs_unlock(v); 3215 } 3216 3217 /* 3218 * nfs special file access vnode op. 3219 * Essentially just get vattr and then imitate iaccess() since the device is 3220 * local to the client. 3221 */ 3222 int 3223 nfsspec_access(v) 3224 void *v; 3225 { 3226 struct vop_access_args /* { 3227 struct vnode *a_vp; 3228 int a_mode; 3229 struct ucred *a_cred; 3230 struct proc *a_p; 3231 } */ *ap = v; 3232 struct vattr va; 3233 struct vnode *vp = ap->a_vp; 3234 int error; 3235 3236 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3237 if (error) 3238 return (error); 3239 3240 /* 3241 * Disallow write attempts on filesystems mounted read-only; 3242 * unless the file is a socket, fifo, or a block or character 3243 * device resident on the filesystem. 3244 */ 3245 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3246 switch (vp->v_type) { 3247 case VREG: 3248 case VDIR: 3249 case VLNK: 3250 return (EROFS); 3251 default: 3252 break; 3253 } 3254 } 3255 3256 return (vaccess(va.va_type, va.va_mode, 3257 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3258 } 3259 3260 /* 3261 * Read wrapper for special devices. 3262 */ 3263 int 3264 nfsspec_read(v) 3265 void *v; 3266 { 3267 struct vop_read_args /* { 3268 struct vnode *a_vp; 3269 struct uio *a_uio; 3270 int a_ioflag; 3271 struct ucred *a_cred; 3272 } */ *ap = v; 3273 struct nfsnode *np = VTONFS(ap->a_vp); 3274 3275 /* 3276 * Set access flag. 3277 */ 3278 np->n_flag |= NACC; 3279 np->n_atim.tv_sec = time.tv_sec; 3280 np->n_atim.tv_nsec = time.tv_usec * 1000; 3281 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3282 } 3283 3284 /* 3285 * Write wrapper for special devices. 3286 */ 3287 int 3288 nfsspec_write(v) 3289 void *v; 3290 { 3291 struct vop_write_args /* { 3292 struct vnode *a_vp; 3293 struct uio *a_uio; 3294 int a_ioflag; 3295 struct ucred *a_cred; 3296 } */ *ap = v; 3297 struct nfsnode *np = VTONFS(ap->a_vp); 3298 3299 /* 3300 * Set update flag. 3301 */ 3302 np->n_flag |= NUPD; 3303 np->n_mtim.tv_sec = time.tv_sec; 3304 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3305 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3306 } 3307 3308 /* 3309 * Close wrapper for special devices. 3310 * 3311 * Update the times on the nfsnode then do device close. 3312 */ 3313 int 3314 nfsspec_close(v) 3315 void *v; 3316 { 3317 struct vop_close_args /* { 3318 struct vnode *a_vp; 3319 int a_fflag; 3320 struct ucred *a_cred; 3321 struct proc *a_p; 3322 } */ *ap = v; 3323 struct vnode *vp = ap->a_vp; 3324 struct nfsnode *np = VTONFS(vp); 3325 struct vattr vattr; 3326 3327 if (np->n_flag & (NACC | NUPD)) { 3328 np->n_flag |= NCHG; 3329 if (vp->v_usecount == 1 && 3330 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3331 VATTR_NULL(&vattr); 3332 if (np->n_flag & NACC) 3333 vattr.va_atime = np->n_atim; 3334 if (np->n_flag & NUPD) 3335 vattr.va_mtime = np->n_mtim; 3336 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3337 } 3338 } 3339 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3340 } 3341 3342 /* 3343 * Read wrapper for fifos. 3344 */ 3345 int 3346 nfsfifo_read(v) 3347 void *v; 3348 { 3349 struct vop_read_args /* { 3350 struct vnode *a_vp; 3351 struct uio *a_uio; 3352 int a_ioflag; 3353 struct ucred *a_cred; 3354 } */ *ap = v; 3355 struct nfsnode *np = VTONFS(ap->a_vp); 3356 3357 /* 3358 * Set access flag. 3359 */ 3360 np->n_flag |= NACC; 3361 np->n_atim.tv_sec = time.tv_sec; 3362 np->n_atim.tv_nsec = time.tv_usec * 1000; 3363 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3364 } 3365 3366 /* 3367 * Write wrapper for fifos. 3368 */ 3369 int 3370 nfsfifo_write(v) 3371 void *v; 3372 { 3373 struct vop_write_args /* { 3374 struct vnode *a_vp; 3375 struct uio *a_uio; 3376 int a_ioflag; 3377 struct ucred *a_cred; 3378 } */ *ap = v; 3379 struct nfsnode *np = VTONFS(ap->a_vp); 3380 3381 /* 3382 * Set update flag. 3383 */ 3384 np->n_flag |= NUPD; 3385 np->n_mtim.tv_sec = time.tv_sec; 3386 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3387 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3388 } 3389 3390 /* 3391 * Close wrapper for fifos. 3392 * 3393 * Update the times on the nfsnode then do fifo close. 3394 */ 3395 int 3396 nfsfifo_close(v) 3397 void *v; 3398 { 3399 struct vop_close_args /* { 3400 struct vnode *a_vp; 3401 int a_fflag; 3402 struct ucred *a_cred; 3403 struct proc *a_p; 3404 } */ *ap = v; 3405 struct vnode *vp = ap->a_vp; 3406 struct nfsnode *np = VTONFS(vp); 3407 struct vattr vattr; 3408 3409 if (np->n_flag & (NACC | NUPD)) { 3410 if (np->n_flag & NACC) { 3411 np->n_atim.tv_sec = time.tv_sec; 3412 np->n_atim.tv_nsec = time.tv_usec * 1000; 3413 } 3414 if (np->n_flag & NUPD) { 3415 np->n_mtim.tv_sec = time.tv_sec; 3416 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3417 } 3418 np->n_flag |= NCHG; 3419 if (vp->v_usecount == 1 && 3420 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3421 VATTR_NULL(&vattr); 3422 if (np->n_flag & NACC) 3423 vattr.va_atime = np->n_atim; 3424 if (np->n_flag & NUPD) 3425 vattr.va_mtime = np->n_mtim; 3426 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3427 } 3428 } 3429 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3430 } 3431
Indexes created Fri Sep 26 08:10:20 GMT 2025