nfs_vnops.c revision 1.170
1 /* $NetBSD: nfs_vnops.c,v 1.170 2003/05/27 14:41:06 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 1.170 2003/05/27 14:41:06 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_writerpc_extfree(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 * free mbuf used to refer protected pages while write rpc call. 1214 */ 1215 static void 1216 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1217 { 1218 1219 KASSERT(m != NULL); 1220 pool_cache_put(&mbpool_cache, m); 1221 } 1222 1223 /* 1224 * nfs write call 1225 */ 1226 int 1227 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverf) 1228 struct vnode *vp; 1229 struct uio *uiop; 1230 int *iomode; 1231 boolean_t pageprotected; 1232 boolean_t *stalewriteverf; 1233 { 1234 u_int32_t *tl; 1235 caddr_t cp; 1236 int32_t t1, t2, backup; 1237 caddr_t bpos, dpos, cp2; 1238 struct mbuf *mreq, *mrep, *md, *mb; 1239 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1240 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1241 const int v3 = NFS_ISV3(vp); 1242 int committed = NFSV3WRITE_FILESYNC; 1243 struct nfsnode *np = VTONFS(vp); 1244 1245 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1246 panic("writerpc readonly vp %p", vp); 1247 } 1248 1249 #ifdef DIAGNOSTIC 1250 if (uiop->uio_iovcnt != 1) 1251 panic("nfs: writerpc iovcnt > 1"); 1252 #endif 1253 tsiz = uiop->uio_resid; 1254 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1255 return (EFBIG); 1256 while (tsiz > 0) { 1257 int datalen; 1258 1259 nfsstats.rpccnt[NFSPROC_WRITE]++; 1260 len = min(tsiz, nmp->nm_wsize); 1261 datalen = pageprotected ? 0 : nfsm_rndup(len); 1262 nfsm_reqhead(np, NFSPROC_WRITE, 1263 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1264 nfsm_fhtom(np, v3); 1265 if (v3) { 1266 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1267 txdr_hyper(uiop->uio_offset, tl); 1268 tl += 2; 1269 *tl++ = txdr_unsigned(len); 1270 *tl++ = txdr_unsigned(*iomode); 1271 *tl = txdr_unsigned(len); 1272 } else { 1273 u_int32_t x; 1274 1275 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1276 /* Set both "begin" and "current" to non-garbage. */ 1277 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1278 *tl++ = x; /* "begin offset" */ 1279 *tl++ = x; /* "current offset" */ 1280 x = txdr_unsigned(len); 1281 *tl++ = x; /* total to this offset */ 1282 *tl = x; /* size of this write */ 1283 1284 } 1285 if (pageprotected) { 1286 /* 1287 * since we know pages can't be modified during i/o, 1288 * no need to copy them for us. 1289 */ 1290 struct mbuf *m; 1291 struct iovec *iovp = uiop->uio_iov; 1292 1293 m = m_get(M_WAIT, MT_DATA); 1294 MCLAIM(m, &nfs_mowner); 1295 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1296 nfs_writerpc_extfree, NULL); 1297 m->m_flags |= M_EXT_ROMAP; 1298 m->m_len = len; 1299 mb->m_next = m; 1300 /* 1301 * no need to maintain mb and bpos here 1302 * because no one care them later. 1303 */ 1304 #if 0 1305 mb = m; 1306 bpos = mtod(caddr_t, mb) + mb->m_len; 1307 #endif 1308 iovp->iov_base = (char *)iovp->iov_base + len; 1309 iovp->iov_len -= len; 1310 uiop->uio_offset += len; 1311 uiop->uio_resid -= len; 1312 } else { 1313 nfsm_uiotom(uiop, len); 1314 } 1315 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, 1316 VTONFS(vp)->n_wcred); 1317 if (v3) { 1318 wccflag = NFSV3_WCCCHK; 1319 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1320 if (!error) { 1321 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1322 + NFSX_V3WRITEVERF); 1323 rlen = fxdr_unsigned(int, *tl++); 1324 if (rlen == 0) { 1325 error = NFSERR_IO; 1326 m_freem(mrep); 1327 break; 1328 } else if (rlen < len) { 1329 backup = len - rlen; 1330 uiop->uio_iov->iov_base = 1331 (caddr_t)uiop->uio_iov->iov_base - 1332 backup; 1333 uiop->uio_iov->iov_len += backup; 1334 uiop->uio_offset -= backup; 1335 uiop->uio_resid += backup; 1336 len = rlen; 1337 } 1338 commit = fxdr_unsigned(int, *tl++); 1339 1340 /* 1341 * Return the lowest committment level 1342 * obtained by any of the RPCs. 1343 */ 1344 if (committed == NFSV3WRITE_FILESYNC) 1345 committed = commit; 1346 else if (committed == NFSV3WRITE_DATASYNC && 1347 commit == NFSV3WRITE_UNSTABLE) 1348 committed = commit; 1349 simple_lock(&nmp->nm_slock); 1350 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1351 memcpy(nmp->nm_writeverf, tl, 1352 NFSX_V3WRITEVERF); 1353 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1354 } else if ((nmp->nm_iflag & 1355 NFSMNT_STALEWRITEVERF) || 1356 memcmp(tl, nmp->nm_writeverf, 1357 NFSX_V3WRITEVERF)) { 1358 *stalewriteverf = TRUE; 1359 memcpy(nmp->nm_writeverf, tl, 1360 NFSX_V3WRITEVERF); 1361 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 1362 } 1363 simple_unlock(&nmp->nm_slock); 1364 } 1365 } else 1366 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1367 if (wccflag) 1368 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1369 m_freem(mrep); 1370 if (error) 1371 break; 1372 tsiz -= len; 1373 } 1374 nfsmout: 1375 *iomode = committed; 1376 if (error) 1377 uiop->uio_resid = tsiz; 1378 return (error); 1379 } 1380 1381 /* 1382 * nfs mknod rpc 1383 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1384 * mode set to specify the file type and the size field for rdev. 1385 */ 1386 int 1387 nfs_mknodrpc(dvp, vpp, cnp, vap) 1388 struct vnode *dvp; 1389 struct vnode **vpp; 1390 struct componentname *cnp; 1391 struct vattr *vap; 1392 { 1393 struct nfsv2_sattr *sp; 1394 u_int32_t *tl; 1395 caddr_t cp; 1396 int32_t t1, t2; 1397 struct vnode *newvp = (struct vnode *)0; 1398 struct nfsnode *dnp, *np; 1399 char *cp2; 1400 caddr_t bpos, dpos; 1401 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1402 struct mbuf *mreq, *mrep, *md, *mb; 1403 u_int32_t rdev; 1404 const int v3 = NFS_ISV3(dvp); 1405 1406 if (vap->va_type == VCHR || vap->va_type == VBLK) 1407 rdev = txdr_unsigned(vap->va_rdev); 1408 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1409 rdev = nfs_xdrneg1; 1410 else { 1411 VOP_ABORTOP(dvp, cnp); 1412 vput(dvp); 1413 return (EOPNOTSUPP); 1414 } 1415 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1416 dnp = VTONFS(dvp); 1417 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1418 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1419 nfsm_fhtom(dnp, v3); 1420 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1421 if (v3) { 1422 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1423 *tl++ = vtonfsv3_type(vap->va_type); 1424 nfsm_v3attrbuild(vap, FALSE); 1425 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1426 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1427 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1428 *tl = txdr_unsigned(minor(vap->va_rdev)); 1429 } 1430 } else { 1431 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1432 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1433 sp->sa_uid = nfs_xdrneg1; 1434 sp->sa_gid = nfs_xdrneg1; 1435 sp->sa_size = rdev; 1436 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1437 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1438 } 1439 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1440 if (!error) { 1441 nfsm_mtofh(dvp, newvp, v3, gotvp); 1442 if (!gotvp) { 1443 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1444 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1445 if (!error) 1446 newvp = NFSTOV(np); 1447 } 1448 } 1449 if (v3) 1450 nfsm_wcc_data(dvp, wccflag, 0); 1451 nfsm_reqdone; 1452 if (error) { 1453 if (newvp) 1454 vput(newvp); 1455 } else { 1456 if (cnp->cn_flags & MAKEENTRY) 1457 cache_enter(dvp, newvp, cnp); 1458 *vpp = newvp; 1459 } 1460 PNBUF_PUT(cnp->cn_pnbuf); 1461 VTONFS(dvp)->n_flag |= NMODIFIED; 1462 if (!wccflag) 1463 VTONFS(dvp)->n_attrstamp = 0; 1464 vput(dvp); 1465 return (error); 1466 } 1467 1468 /* 1469 * nfs mknod vop 1470 * just call nfs_mknodrpc() to do the work. 1471 */ 1472 /* ARGSUSED */ 1473 int 1474 nfs_mknod(v) 1475 void *v; 1476 { 1477 struct vop_mknod_args /* { 1478 struct vnode *a_dvp; 1479 struct vnode **a_vpp; 1480 struct componentname *a_cnp; 1481 struct vattr *a_vap; 1482 } */ *ap = v; 1483 int error; 1484 1485 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1486 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1487 return (error); 1488 } 1489 1490 static u_long create_verf; 1491 /* 1492 * nfs file create call 1493 */ 1494 int 1495 nfs_create(v) 1496 void *v; 1497 { 1498 struct vop_create_args /* { 1499 struct vnode *a_dvp; 1500 struct vnode **a_vpp; 1501 struct componentname *a_cnp; 1502 struct vattr *a_vap; 1503 } */ *ap = v; 1504 struct vnode *dvp = ap->a_dvp; 1505 struct vattr *vap = ap->a_vap; 1506 struct componentname *cnp = ap->a_cnp; 1507 struct nfsv2_sattr *sp; 1508 u_int32_t *tl; 1509 caddr_t cp; 1510 int32_t t1, t2; 1511 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1512 struct vnode *newvp = (struct vnode *)0; 1513 caddr_t bpos, dpos, cp2; 1514 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1515 struct mbuf *mreq, *mrep, *md, *mb; 1516 const int v3 = NFS_ISV3(dvp); 1517 1518 /* 1519 * Oops, not for me.. 1520 */ 1521 if (vap->va_type == VSOCK) 1522 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1523 1524 #ifdef VA_EXCLUSIVE 1525 if (vap->va_vaflags & VA_EXCLUSIVE) 1526 fmode |= O_EXCL; 1527 #endif 1528 again: 1529 error = 0; 1530 nfsstats.rpccnt[NFSPROC_CREATE]++; 1531 dnp = VTONFS(dvp); 1532 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1533 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1534 nfsm_fhtom(dnp, v3); 1535 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1536 if (v3) { 1537 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1538 if (fmode & O_EXCL) { 1539 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1540 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1541 #ifdef INET 1542 if (TAILQ_FIRST(&in_ifaddr)) 1543 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1544 else 1545 *tl++ = create_verf; 1546 #else 1547 *tl++ = create_verf; 1548 #endif 1549 *tl = ++create_verf; 1550 } else { 1551 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1552 nfsm_v3attrbuild(vap, FALSE); 1553 } 1554 } else { 1555 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1556 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1557 sp->sa_uid = nfs_xdrneg1; 1558 sp->sa_gid = nfs_xdrneg1; 1559 sp->sa_size = 0; 1560 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1561 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1562 } 1563 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1564 if (!error) { 1565 nfsm_mtofh(dvp, newvp, v3, gotvp); 1566 if (!gotvp) { 1567 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1568 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1569 if (!error) 1570 newvp = NFSTOV(np); 1571 } 1572 } 1573 if (v3) 1574 nfsm_wcc_data(dvp, wccflag, 0); 1575 nfsm_reqdone; 1576 if (error) { 1577 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1578 fmode &= ~O_EXCL; 1579 goto again; 1580 } 1581 if (newvp) 1582 vput(newvp); 1583 } else if (v3 && (fmode & O_EXCL)) 1584 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1585 if (!error) { 1586 if (cnp->cn_flags & MAKEENTRY) 1587 cache_enter(dvp, newvp, cnp); 1588 *ap->a_vpp = newvp; 1589 } 1590 PNBUF_PUT(cnp->cn_pnbuf); 1591 VTONFS(dvp)->n_flag |= NMODIFIED; 1592 if (!wccflag) 1593 VTONFS(dvp)->n_attrstamp = 0; 1594 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1595 vput(dvp); 1596 return (error); 1597 } 1598 1599 /* 1600 * nfs file remove call 1601 * To try and make nfs semantics closer to ufs semantics, a file that has 1602 * other processes using the vnode is renamed instead of removed and then 1603 * removed later on the last close. 1604 * - If v_usecount > 1 1605 * If a rename is not already in the works 1606 * call nfs_sillyrename() to set it up 1607 * else 1608 * do the remove rpc 1609 */ 1610 int 1611 nfs_remove(v) 1612 void *v; 1613 { 1614 struct vop_remove_args /* { 1615 struct vnodeop_desc *a_desc; 1616 struct vnode * a_dvp; 1617 struct vnode * a_vp; 1618 struct componentname * a_cnp; 1619 } */ *ap = v; 1620 struct vnode *vp = ap->a_vp; 1621 struct vnode *dvp = ap->a_dvp; 1622 struct componentname *cnp = ap->a_cnp; 1623 struct nfsnode *np = VTONFS(vp); 1624 int error = 0; 1625 struct vattr vattr; 1626 1627 #ifndef DIAGNOSTIC 1628 if ((cnp->cn_flags & HASBUF) == 0) 1629 panic("nfs_remove: no name"); 1630 if (vp->v_usecount < 1) 1631 panic("nfs_remove: bad v_usecount"); 1632 #endif 1633 if (vp->v_type == VDIR) 1634 error = EPERM; 1635 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1636 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1637 vattr.va_nlink > 1)) { 1638 /* 1639 * Purge the name cache so that the chance of a lookup for 1640 * the name succeeding while the remove is in progress is 1641 * minimized. Without node locking it can still happen, such 1642 * that an I/O op returns ESTALE, but since you get this if 1643 * another host removes the file.. 1644 */ 1645 cache_purge(vp); 1646 /* 1647 * throw away biocache buffers, mainly to avoid 1648 * unnecessary delayed writes later. 1649 */ 1650 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1651 /* Do the rpc */ 1652 if (error != EINTR) 1653 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1654 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1655 /* 1656 * Kludge City: If the first reply to the remove rpc is lost.. 1657 * the reply to the retransmitted request will be ENOENT 1658 * since the file was in fact removed 1659 * Therefore, we cheat and return success. 1660 */ 1661 if (error == ENOENT) 1662 error = 0; 1663 } else if (!np->n_sillyrename) 1664 error = nfs_sillyrename(dvp, vp, cnp); 1665 PNBUF_PUT(cnp->cn_pnbuf); 1666 np->n_attrstamp = 0; 1667 VN_KNOTE(vp, NOTE_DELETE); 1668 VN_KNOTE(dvp, NOTE_WRITE); 1669 if (dvp == vp) 1670 vrele(vp); 1671 else 1672 vput(vp); 1673 vput(dvp); 1674 return (error); 1675 } 1676 1677 /* 1678 * nfs file remove rpc called from nfs_inactive 1679 */ 1680 int 1681 nfs_removeit(sp) 1682 struct sillyrename *sp; 1683 { 1684 1685 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1686 (struct proc *)0)); 1687 } 1688 1689 /* 1690 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1691 */ 1692 int 1693 nfs_removerpc(dvp, name, namelen, cred, proc) 1694 struct vnode *dvp; 1695 const char *name; 1696 int namelen; 1697 struct ucred *cred; 1698 struct proc *proc; 1699 { 1700 u_int32_t *tl; 1701 caddr_t cp; 1702 int32_t t1, t2; 1703 caddr_t bpos, dpos, cp2; 1704 int error = 0, wccflag = NFSV3_WCCRATTR; 1705 struct mbuf *mreq, *mrep, *md, *mb; 1706 const int v3 = NFS_ISV3(dvp); 1707 struct nfsnode *dnp = VTONFS(dvp); 1708 1709 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1710 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1711 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1712 nfsm_fhtom(dnp, v3); 1713 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1714 nfsm_request(dnp, NFSPROC_REMOVE, proc, cred); 1715 if (v3) 1716 nfsm_wcc_data(dvp, wccflag, 0); 1717 nfsm_reqdone; 1718 VTONFS(dvp)->n_flag |= NMODIFIED; 1719 if (!wccflag) 1720 VTONFS(dvp)->n_attrstamp = 0; 1721 return (error); 1722 } 1723 1724 /* 1725 * nfs file rename call 1726 */ 1727 int 1728 nfs_rename(v) 1729 void *v; 1730 { 1731 struct vop_rename_args /* { 1732 struct vnode *a_fdvp; 1733 struct vnode *a_fvp; 1734 struct componentname *a_fcnp; 1735 struct vnode *a_tdvp; 1736 struct vnode *a_tvp; 1737 struct componentname *a_tcnp; 1738 } */ *ap = v; 1739 struct vnode *fvp = ap->a_fvp; 1740 struct vnode *tvp = ap->a_tvp; 1741 struct vnode *fdvp = ap->a_fdvp; 1742 struct vnode *tdvp = ap->a_tdvp; 1743 struct componentname *tcnp = ap->a_tcnp; 1744 struct componentname *fcnp = ap->a_fcnp; 1745 int error; 1746 1747 #ifndef DIAGNOSTIC 1748 if ((tcnp->cn_flags & HASBUF) == 0 || 1749 (fcnp->cn_flags & HASBUF) == 0) 1750 panic("nfs_rename: no name"); 1751 #endif 1752 /* Check for cross-device rename */ 1753 if ((fvp->v_mount != tdvp->v_mount) || 1754 (tvp && (fvp->v_mount != tvp->v_mount))) { 1755 error = EXDEV; 1756 goto out; 1757 } 1758 1759 /* 1760 * If the tvp exists and is in use, sillyrename it before doing the 1761 * rename of the new file over it. 1762 */ 1763 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1764 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1765 VN_KNOTE(tvp, NOTE_DELETE); 1766 vput(tvp); 1767 tvp = NULL; 1768 } 1769 1770 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1771 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1772 tcnp->cn_proc); 1773 1774 VN_KNOTE(fdvp, NOTE_WRITE); 1775 VN_KNOTE(tdvp, NOTE_WRITE); 1776 if (fvp->v_type == VDIR) { 1777 if (tvp != NULL && tvp->v_type == VDIR) 1778 cache_purge(tdvp); 1779 cache_purge(fdvp); 1780 } 1781 out: 1782 if (tdvp == tvp) 1783 vrele(tdvp); 1784 else 1785 vput(tdvp); 1786 if (tvp) 1787 vput(tvp); 1788 vrele(fdvp); 1789 vrele(fvp); 1790 /* 1791 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1792 */ 1793 if (error == ENOENT) 1794 error = 0; 1795 return (error); 1796 } 1797 1798 /* 1799 * nfs file rename rpc called from nfs_remove() above 1800 */ 1801 int 1802 nfs_renameit(sdvp, scnp, sp) 1803 struct vnode *sdvp; 1804 struct componentname *scnp; 1805 struct sillyrename *sp; 1806 { 1807 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1808 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1809 } 1810 1811 /* 1812 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1813 */ 1814 int 1815 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1816 struct vnode *fdvp; 1817 const char *fnameptr; 1818 int fnamelen; 1819 struct vnode *tdvp; 1820 const char *tnameptr; 1821 int tnamelen; 1822 struct ucred *cred; 1823 struct proc *proc; 1824 { 1825 u_int32_t *tl; 1826 caddr_t cp; 1827 int32_t t1, t2; 1828 caddr_t bpos, dpos, cp2; 1829 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1830 struct mbuf *mreq, *mrep, *md, *mb; 1831 const int v3 = NFS_ISV3(fdvp); 1832 struct nfsnode *fdnp = VTONFS(fdvp); 1833 1834 nfsstats.rpccnt[NFSPROC_RENAME]++; 1835 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1836 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1837 nfsm_rndup(tnamelen)); 1838 nfsm_fhtom(fdnp, v3); 1839 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1840 nfsm_fhtom(VTONFS(tdvp), v3); 1841 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1842 nfsm_request(fdnp, NFSPROC_RENAME, proc, cred); 1843 if (v3) { 1844 nfsm_wcc_data(fdvp, fwccflag, 0); 1845 nfsm_wcc_data(tdvp, twccflag, 0); 1846 } 1847 nfsm_reqdone; 1848 VTONFS(fdvp)->n_flag |= NMODIFIED; 1849 VTONFS(tdvp)->n_flag |= NMODIFIED; 1850 if (!fwccflag) 1851 VTONFS(fdvp)->n_attrstamp = 0; 1852 if (!twccflag) 1853 VTONFS(tdvp)->n_attrstamp = 0; 1854 return (error); 1855 } 1856 1857 /* 1858 * nfs hard link create call 1859 */ 1860 int 1861 nfs_link(v) 1862 void *v; 1863 { 1864 struct vop_link_args /* { 1865 struct vnode *a_dvp; 1866 struct vnode *a_vp; 1867 struct componentname *a_cnp; 1868 } */ *ap = v; 1869 struct vnode *vp = ap->a_vp; 1870 struct vnode *dvp = ap->a_dvp; 1871 struct componentname *cnp = ap->a_cnp; 1872 u_int32_t *tl; 1873 caddr_t cp; 1874 int32_t t1, t2; 1875 caddr_t bpos, dpos, cp2; 1876 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1877 struct mbuf *mreq, *mrep, *md, *mb; 1878 /* XXX Should be const and initialised? */ 1879 int v3; 1880 struct nfsnode *np; 1881 1882 if (dvp->v_mount != vp->v_mount) { 1883 VOP_ABORTOP(dvp, cnp); 1884 vput(dvp); 1885 return (EXDEV); 1886 } 1887 if (dvp != vp) { 1888 error = vn_lock(vp, LK_EXCLUSIVE); 1889 if (error != 0) { 1890 VOP_ABORTOP(dvp, cnp); 1891 vput(dvp); 1892 return error; 1893 } 1894 } 1895 1896 /* 1897 * Push all writes to the server, so that the attribute cache 1898 * doesn't get "out of sync" with the server. 1899 * XXX There should be a better way! 1900 */ 1901 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1902 1903 v3 = NFS_ISV3(vp); 1904 nfsstats.rpccnt[NFSPROC_LINK]++; 1905 np = VTONFS(vp); 1906 nfsm_reqhead(np, NFSPROC_LINK, 1907 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1908 nfsm_fhtom(np, v3); 1909 nfsm_fhtom(VTONFS(dvp), v3); 1910 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1911 nfsm_request(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1912 if (v3) { 1913 nfsm_postop_attr(vp, attrflag, 0); 1914 nfsm_wcc_data(dvp, wccflag, 0); 1915 } 1916 nfsm_reqdone; 1917 PNBUF_PUT(cnp->cn_pnbuf); 1918 VTONFS(dvp)->n_flag |= NMODIFIED; 1919 if (!attrflag) 1920 VTONFS(vp)->n_attrstamp = 0; 1921 if (!wccflag) 1922 VTONFS(dvp)->n_attrstamp = 0; 1923 if (dvp != vp) 1924 VOP_UNLOCK(vp, 0); 1925 VN_KNOTE(vp, NOTE_LINK); 1926 VN_KNOTE(dvp, NOTE_WRITE); 1927 vput(dvp); 1928 /* 1929 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1930 */ 1931 if (error == EEXIST) 1932 error = 0; 1933 return (error); 1934 } 1935 1936 /* 1937 * nfs symbolic link create call 1938 */ 1939 int 1940 nfs_symlink(v) 1941 void *v; 1942 { 1943 struct vop_symlink_args /* { 1944 struct vnode *a_dvp; 1945 struct vnode **a_vpp; 1946 struct componentname *a_cnp; 1947 struct vattr *a_vap; 1948 char *a_target; 1949 } */ *ap = v; 1950 struct vnode *dvp = ap->a_dvp; 1951 struct vattr *vap = ap->a_vap; 1952 struct componentname *cnp = ap->a_cnp; 1953 struct nfsv2_sattr *sp; 1954 u_int32_t *tl; 1955 caddr_t cp; 1956 int32_t t1, t2; 1957 caddr_t bpos, dpos, cp2; 1958 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1959 struct mbuf *mreq, *mrep, *md, *mb; 1960 struct vnode *newvp = (struct vnode *)0; 1961 const int v3 = NFS_ISV3(dvp); 1962 struct nfsnode *dnp = VTONFS(dvp); 1963 1964 *ap->a_vpp = NULL; 1965 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1966 slen = strlen(ap->a_target); 1967 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1968 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1969 nfsm_fhtom(dnp, v3); 1970 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1971 if (v3) 1972 nfsm_v3attrbuild(vap, FALSE); 1973 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1974 if (!v3) { 1975 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1976 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1977 sp->sa_uid = nfs_xdrneg1; 1978 sp->sa_gid = nfs_xdrneg1; 1979 sp->sa_size = nfs_xdrneg1; 1980 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1981 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1982 } 1983 nfsm_request(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1984 if (v3) { 1985 if (!error) 1986 nfsm_mtofh(dvp, newvp, v3, gotvp); 1987 nfsm_wcc_data(dvp, wccflag, 0); 1988 } 1989 nfsm_reqdone; 1990 /* 1991 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1992 */ 1993 if (error == EEXIST) 1994 error = 0; 1995 if (error == 0 && newvp == NULL) { 1996 struct nfsnode *np = NULL; 1997 1998 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1999 cnp->cn_cred, cnp->cn_proc, &np); 2000 if (error == 0) 2001 newvp = NFSTOV(np); 2002 } 2003 if (error) { 2004 if (newvp != NULL) 2005 vput(newvp); 2006 } else { 2007 *ap->a_vpp = newvp; 2008 } 2009 PNBUF_PUT(cnp->cn_pnbuf); 2010 VTONFS(dvp)->n_flag |= NMODIFIED; 2011 if (!wccflag) 2012 VTONFS(dvp)->n_attrstamp = 0; 2013 VN_KNOTE(dvp, NOTE_WRITE); 2014 vput(dvp); 2015 return (error); 2016 } 2017 2018 /* 2019 * nfs make dir call 2020 */ 2021 int 2022 nfs_mkdir(v) 2023 void *v; 2024 { 2025 struct vop_mkdir_args /* { 2026 struct vnode *a_dvp; 2027 struct vnode **a_vpp; 2028 struct componentname *a_cnp; 2029 struct vattr *a_vap; 2030 } */ *ap = v; 2031 struct vnode *dvp = ap->a_dvp; 2032 struct vattr *vap = ap->a_vap; 2033 struct componentname *cnp = ap->a_cnp; 2034 struct nfsv2_sattr *sp; 2035 u_int32_t *tl; 2036 caddr_t cp; 2037 int32_t t1, t2; 2038 int len; 2039 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2040 struct vnode *newvp = (struct vnode *)0; 2041 caddr_t bpos, dpos, cp2; 2042 int error = 0, wccflag = NFSV3_WCCRATTR; 2043 int gotvp = 0; 2044 struct mbuf *mreq, *mrep, *md, *mb; 2045 const int v3 = NFS_ISV3(dvp); 2046 2047 len = cnp->cn_namelen; 2048 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2049 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2050 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2051 nfsm_fhtom(dnp, v3); 2052 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2053 if (v3) { 2054 nfsm_v3attrbuild(vap, FALSE); 2055 } else { 2056 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2057 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2058 sp->sa_uid = nfs_xdrneg1; 2059 sp->sa_gid = nfs_xdrneg1; 2060 sp->sa_size = nfs_xdrneg1; 2061 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2062 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2063 } 2064 nfsm_request(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 2065 if (!error) 2066 nfsm_mtofh(dvp, newvp, v3, gotvp); 2067 if (v3) 2068 nfsm_wcc_data(dvp, wccflag, 0); 2069 nfsm_reqdone; 2070 VTONFS(dvp)->n_flag |= NMODIFIED; 2071 if (!wccflag) 2072 VTONFS(dvp)->n_attrstamp = 0; 2073 /* 2074 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2075 * if we can succeed in looking up the directory. 2076 */ 2077 if (error == EEXIST || (!error && !gotvp)) { 2078 if (newvp) { 2079 vput(newvp); 2080 newvp = (struct vnode *)0; 2081 } 2082 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2083 cnp->cn_proc, &np); 2084 if (!error) { 2085 newvp = NFSTOV(np); 2086 if (newvp->v_type != VDIR) 2087 error = EEXIST; 2088 } 2089 } 2090 if (error) { 2091 if (newvp) 2092 vput(newvp); 2093 } else { 2094 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2095 if (cnp->cn_flags & MAKEENTRY) 2096 cache_enter(dvp, newvp, cnp); 2097 *ap->a_vpp = newvp; 2098 } 2099 PNBUF_PUT(cnp->cn_pnbuf); 2100 vput(dvp); 2101 return (error); 2102 } 2103 2104 /* 2105 * nfs remove directory call 2106 */ 2107 int 2108 nfs_rmdir(v) 2109 void *v; 2110 { 2111 struct vop_rmdir_args /* { 2112 struct vnode *a_dvp; 2113 struct vnode *a_vp; 2114 struct componentname *a_cnp; 2115 } */ *ap = v; 2116 struct vnode *vp = ap->a_vp; 2117 struct vnode *dvp = ap->a_dvp; 2118 struct componentname *cnp = ap->a_cnp; 2119 u_int32_t *tl; 2120 caddr_t cp; 2121 int32_t t1, t2; 2122 caddr_t bpos, dpos, cp2; 2123 int error = 0, wccflag = NFSV3_WCCRATTR; 2124 struct mbuf *mreq, *mrep, *md, *mb; 2125 const int v3 = NFS_ISV3(dvp); 2126 struct nfsnode *dnp; 2127 2128 if (dvp == vp) { 2129 vrele(dvp); 2130 vput(dvp); 2131 PNBUF_PUT(cnp->cn_pnbuf); 2132 return (EINVAL); 2133 } 2134 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2135 dnp = VTONFS(dvp); 2136 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2137 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2138 nfsm_fhtom(dnp, v3); 2139 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2140 nfsm_request(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2141 if (v3) 2142 nfsm_wcc_data(dvp, wccflag, 0); 2143 nfsm_reqdone; 2144 PNBUF_PUT(cnp->cn_pnbuf); 2145 VTONFS(dvp)->n_flag |= NMODIFIED; 2146 if (!wccflag) 2147 VTONFS(dvp)->n_attrstamp = 0; 2148 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2149 VN_KNOTE(vp, NOTE_DELETE); 2150 cache_purge(dvp); 2151 cache_purge(vp); 2152 vput(vp); 2153 vput(dvp); 2154 /* 2155 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2156 */ 2157 if (error == ENOENT) 2158 error = 0; 2159 return (error); 2160 } 2161 2162 /* 2163 * nfs readdir call 2164 */ 2165 int 2166 nfs_readdir(v) 2167 void *v; 2168 { 2169 struct vop_readdir_args /* { 2170 struct vnode *a_vp; 2171 struct uio *a_uio; 2172 struct ucred *a_cred; 2173 int *a_eofflag; 2174 off_t **a_cookies; 2175 int *a_ncookies; 2176 } */ *ap = v; 2177 struct vnode *vp = ap->a_vp; 2178 struct uio *uio = ap->a_uio; 2179 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2180 char *base = uio->uio_iov->iov_base; 2181 int tresid, error; 2182 size_t count, lost; 2183 struct dirent *dp; 2184 off_t *cookies = NULL; 2185 int ncookies = 0, nc; 2186 2187 if (vp->v_type != VDIR) 2188 return (EPERM); 2189 2190 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2191 count = uio->uio_resid - lost; 2192 if (count <= 0) 2193 return (EINVAL); 2194 2195 /* 2196 * Call nfs_bioread() to do the real work. 2197 */ 2198 tresid = uio->uio_resid = count; 2199 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2200 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2201 2202 if (!error && ap->a_cookies) { 2203 ncookies = count / 16; 2204 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2205 *ap->a_cookies = cookies; 2206 } 2207 2208 if (!error && uio->uio_resid == tresid) { 2209 uio->uio_resid += lost; 2210 nfsstats.direofcache_misses++; 2211 if (ap->a_cookies) 2212 *ap->a_ncookies = 0; 2213 *ap->a_eofflag = 1; 2214 return (0); 2215 } 2216 2217 if (!error && ap->a_cookies) { 2218 /* 2219 * Only the NFS server and emulations use cookies, and they 2220 * load the directory block into system space, so we can 2221 * just look at it directly. 2222 */ 2223 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2224 panic("nfs_readdir: lost in space"); 2225 for (nc = 0; ncookies-- && 2226 base < (char *)uio->uio_iov->iov_base; nc++){ 2227 dp = (struct dirent *) base; 2228 if (dp->d_reclen == 0) 2229 break; 2230 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2231 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2232 else 2233 *(cookies++) = NFS_GETCOOKIE(dp); 2234 base += dp->d_reclen; 2235 } 2236 uio->uio_resid += 2237 ((caddr_t)uio->uio_iov->iov_base - base); 2238 uio->uio_iov->iov_len += 2239 ((caddr_t)uio->uio_iov->iov_base - base); 2240 uio->uio_iov->iov_base = base; 2241 *ap->a_ncookies = nc; 2242 } 2243 2244 uio->uio_resid += lost; 2245 *ap->a_eofflag = 0; 2246 return (error); 2247 } 2248 2249 /* 2250 * Readdir rpc call. 2251 * Called from below the buffer cache by nfs_doio(). 2252 */ 2253 int 2254 nfs_readdirrpc(vp, uiop, cred) 2255 struct vnode *vp; 2256 struct uio *uiop; 2257 struct ucred *cred; 2258 { 2259 int len, left; 2260 struct dirent *dp = NULL; 2261 u_int32_t *tl; 2262 caddr_t cp; 2263 int32_t t1, t2; 2264 caddr_t bpos, dpos, cp2; 2265 struct mbuf *mreq, *mrep, *md, *mb; 2266 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2267 struct nfsnode *dnp = VTONFS(vp); 2268 u_quad_t fileno; 2269 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2270 int attrflag, nrpcs = 0, reclen; 2271 const int v3 = NFS_ISV3(vp); 2272 2273 #ifdef DIAGNOSTIC 2274 /* 2275 * Should be called from buffer cache, so only amount of 2276 * NFS_DIRBLKSIZ will be requested. 2277 */ 2278 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2279 panic("nfs readdirrpc bad uio"); 2280 #endif 2281 2282 /* 2283 * Loop around doing readdir rpc's of size nm_readdirsize 2284 * truncated to a multiple of NFS_DIRFRAGSIZ. 2285 * The stopping criteria is EOF or buffer full. 2286 */ 2287 while (more_dirs && bigenough) { 2288 /* 2289 * Heuristic: don't bother to do another RPC to further 2290 * fill up this block if there is not much room left. (< 50% 2291 * of the readdir RPC size). This wastes some buffer space 2292 * but can save up to 50% in RPC calls. 2293 */ 2294 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2295 bigenough = 0; 2296 break; 2297 } 2298 nfsstats.rpccnt[NFSPROC_READDIR]++; 2299 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2300 NFSX_READDIR(v3)); 2301 nfsm_fhtom(dnp, v3); 2302 if (v3) { 2303 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2304 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2305 txdr_swapcookie3(uiop->uio_offset, tl); 2306 } else { 2307 txdr_cookie3(uiop->uio_offset, tl); 2308 } 2309 tl += 2; 2310 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2311 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2312 } else { 2313 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2314 *tl++ = txdr_unsigned(uiop->uio_offset); 2315 } 2316 *tl = txdr_unsigned(nmp->nm_readdirsize); 2317 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2318 nrpcs++; 2319 if (v3) { 2320 nfsm_postop_attr(vp, attrflag, 0); 2321 if (!error) { 2322 nfsm_dissect(tl, u_int32_t *, 2323 2 * NFSX_UNSIGNED); 2324 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2325 dnp->n_cookieverf.nfsuquad[1] = *tl; 2326 } else { 2327 m_freem(mrep); 2328 goto nfsmout; 2329 } 2330 } 2331 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2332 more_dirs = fxdr_unsigned(int, *tl); 2333 2334 /* loop thru the dir entries, doctoring them to 4bsd form */ 2335 while (more_dirs && bigenough) { 2336 if (v3) { 2337 nfsm_dissect(tl, u_int32_t *, 2338 3 * NFSX_UNSIGNED); 2339 fileno = fxdr_hyper(tl); 2340 len = fxdr_unsigned(int, *(tl + 2)); 2341 } else { 2342 nfsm_dissect(tl, u_int32_t *, 2343 2 * NFSX_UNSIGNED); 2344 fileno = fxdr_unsigned(u_quad_t, *tl++); 2345 len = fxdr_unsigned(int, *tl); 2346 } 2347 if (len <= 0 || len > NFS_MAXNAMLEN) { 2348 error = EBADRPC; 2349 m_freem(mrep); 2350 goto nfsmout; 2351 } 2352 tlen = nfsm_rndup(len); 2353 if (tlen == len) 2354 tlen += 4; /* To ensure null termination */ 2355 tlen += sizeof (off_t) + sizeof (int); 2356 reclen = ALIGN(tlen + DIRHDSIZ); 2357 tlen = reclen - DIRHDSIZ; 2358 left = NFS_DIRFRAGSIZ - blksiz; 2359 if (reclen > left) { 2360 dp->d_reclen += left; 2361 uiop->uio_iov->iov_base = 2362 (caddr_t)uiop->uio_iov->iov_base + left; 2363 uiop->uio_iov->iov_len -= left; 2364 uiop->uio_resid -= left; 2365 blksiz = 0; 2366 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2367 } 2368 if (reclen > uiop->uio_resid) 2369 bigenough = 0; 2370 if (bigenough) { 2371 dp = (struct dirent *)uiop->uio_iov->iov_base; 2372 dp->d_fileno = (int)fileno; 2373 dp->d_namlen = len; 2374 dp->d_reclen = reclen; 2375 dp->d_type = DT_UNKNOWN; 2376 blksiz += dp->d_reclen; 2377 if (blksiz == NFS_DIRFRAGSIZ) 2378 blksiz = 0; 2379 uiop->uio_resid -= DIRHDSIZ; 2380 uiop->uio_iov->iov_base = 2381 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2382 uiop->uio_iov->iov_len -= DIRHDSIZ; 2383 nfsm_mtouio(uiop, len); 2384 cp = uiop->uio_iov->iov_base; 2385 tlen -= len; 2386 *cp = '\0'; /* null terminate */ 2387 uiop->uio_iov->iov_base = 2388 (caddr_t)uiop->uio_iov->iov_base + tlen; 2389 uiop->uio_iov->iov_len -= tlen; 2390 uiop->uio_resid -= tlen; 2391 } else 2392 nfsm_adv(nfsm_rndup(len)); 2393 if (v3) { 2394 nfsm_dissect(tl, u_int32_t *, 2395 3 * NFSX_UNSIGNED); 2396 } else { 2397 nfsm_dissect(tl, u_int32_t *, 2398 2 * NFSX_UNSIGNED); 2399 } 2400 if (bigenough) { 2401 if (v3) { 2402 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2403 uiop->uio_offset = 2404 fxdr_swapcookie3(tl); 2405 else 2406 uiop->uio_offset = 2407 fxdr_cookie3(tl); 2408 } 2409 else { 2410 uiop->uio_offset = 2411 fxdr_unsigned(off_t, *tl); 2412 } 2413 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2414 } 2415 if (v3) 2416 tl += 2; 2417 else 2418 tl++; 2419 more_dirs = fxdr_unsigned(int, *tl); 2420 } 2421 /* 2422 * If at end of rpc data, get the eof boolean 2423 */ 2424 if (!more_dirs) { 2425 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2426 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2427 } 2428 m_freem(mrep); 2429 } 2430 /* 2431 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2432 * by increasing d_reclen for the last record. 2433 */ 2434 if (blksiz > 0) { 2435 left = NFS_DIRFRAGSIZ - blksiz; 2436 dp->d_reclen += left; 2437 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2438 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2439 left; 2440 uiop->uio_iov->iov_len -= left; 2441 uiop->uio_resid -= left; 2442 } 2443 2444 /* 2445 * We are now either at the end of the directory or have filled the 2446 * block. 2447 */ 2448 if (bigenough) 2449 dnp->n_direofoffset = uiop->uio_offset; 2450 nfsmout: 2451 return (error); 2452 } 2453 2454 /* 2455 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2456 */ 2457 int 2458 nfs_readdirplusrpc(vp, uiop, cred) 2459 struct vnode *vp; 2460 struct uio *uiop; 2461 struct ucred *cred; 2462 { 2463 int len, left; 2464 struct dirent *dp = NULL; 2465 u_int32_t *tl; 2466 caddr_t cp; 2467 int32_t t1, t2; 2468 struct vnode *newvp; 2469 caddr_t bpos, dpos, cp2; 2470 struct mbuf *mreq, *mrep, *md, *mb; 2471 struct nameidata nami, *ndp = &nami; 2472 struct componentname *cnp = &ndp->ni_cnd; 2473 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2474 struct nfsnode *dnp = VTONFS(vp), *np; 2475 nfsfh_t *fhp; 2476 u_quad_t fileno; 2477 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2478 int attrflag, fhsize, nrpcs = 0, reclen; 2479 struct nfs_fattr fattr, *fp; 2480 2481 #ifdef DIAGNOSTIC 2482 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2483 panic("nfs readdirplusrpc bad uio"); 2484 #endif 2485 ndp->ni_dvp = vp; 2486 newvp = NULLVP; 2487 2488 /* 2489 * Loop around doing readdir rpc's of size nm_readdirsize 2490 * truncated to a multiple of NFS_DIRFRAGSIZ. 2491 * The stopping criteria is EOF or buffer full. 2492 */ 2493 while (more_dirs && bigenough) { 2494 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2495 bigenough = 0; 2496 break; 2497 } 2498 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2499 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2500 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2501 nfsm_fhtom(dnp, 1); 2502 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2503 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2504 txdr_swapcookie3(uiop->uio_offset, tl); 2505 } else { 2506 txdr_cookie3(uiop->uio_offset, tl); 2507 } 2508 tl += 2; 2509 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2510 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2511 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2512 *tl = txdr_unsigned(nmp->nm_rsize); 2513 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2514 nfsm_postop_attr(vp, attrflag, 0); 2515 if (error) { 2516 m_freem(mrep); 2517 goto nfsmout; 2518 } 2519 nrpcs++; 2520 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2521 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2522 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2523 more_dirs = fxdr_unsigned(int, *tl); 2524 2525 /* loop thru the dir entries, doctoring them to 4bsd form */ 2526 while (more_dirs && bigenough) { 2527 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2528 fileno = fxdr_hyper(tl); 2529 len = fxdr_unsigned(int, *(tl + 2)); 2530 if (len <= 0 || len > NFS_MAXNAMLEN) { 2531 error = EBADRPC; 2532 m_freem(mrep); 2533 goto nfsmout; 2534 } 2535 tlen = nfsm_rndup(len); 2536 if (tlen == len) 2537 tlen += 4; /* To ensure null termination*/ 2538 tlen += sizeof (off_t) + sizeof (int); 2539 reclen = ALIGN(tlen + DIRHDSIZ); 2540 tlen = reclen - DIRHDSIZ; 2541 left = NFS_DIRFRAGSIZ - blksiz; 2542 if (reclen > left) { 2543 /* 2544 * DIRFRAGSIZ is aligned, no need to align 2545 * again here. 2546 */ 2547 dp->d_reclen += left; 2548 uiop->uio_iov->iov_base = 2549 (caddr_t)uiop->uio_iov->iov_base + left; 2550 uiop->uio_iov->iov_len -= left; 2551 uiop->uio_resid -= left; 2552 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2553 blksiz = 0; 2554 } 2555 if (reclen > uiop->uio_resid) 2556 bigenough = 0; 2557 if (bigenough) { 2558 dp = (struct dirent *)uiop->uio_iov->iov_base; 2559 dp->d_fileno = (int)fileno; 2560 dp->d_namlen = len; 2561 dp->d_reclen = reclen; 2562 dp->d_type = DT_UNKNOWN; 2563 blksiz += dp->d_reclen; 2564 if (blksiz == NFS_DIRFRAGSIZ) 2565 blksiz = 0; 2566 uiop->uio_resid -= DIRHDSIZ; 2567 uiop->uio_iov->iov_base = 2568 (caddr_t)uiop->uio_iov->iov_base + 2569 DIRHDSIZ; 2570 uiop->uio_iov->iov_len -= DIRHDSIZ; 2571 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2572 cnp->cn_namelen = len; 2573 nfsm_mtouio(uiop, len); 2574 cp = uiop->uio_iov->iov_base; 2575 tlen -= len; 2576 *cp = '\0'; 2577 uiop->uio_iov->iov_base = 2578 (caddr_t)uiop->uio_iov->iov_base + tlen; 2579 uiop->uio_iov->iov_len -= tlen; 2580 uiop->uio_resid -= tlen; 2581 } else 2582 nfsm_adv(nfsm_rndup(len)); 2583 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2584 if (bigenough) { 2585 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2586 uiop->uio_offset = 2587 fxdr_swapcookie3(tl); 2588 else 2589 uiop->uio_offset = 2590 fxdr_cookie3(tl); 2591 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2592 } 2593 tl += 2; 2594 2595 /* 2596 * Since the attributes are before the file handle 2597 * (sigh), we must skip over the attributes and then 2598 * come back and get them. 2599 */ 2600 attrflag = fxdr_unsigned(int, *tl); 2601 if (attrflag) { 2602 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2603 memcpy(&fattr, fp, NFSX_V3FATTR); 2604 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2605 doit = fxdr_unsigned(int, *tl); 2606 if (doit) { 2607 nfsm_getfh(fhp, fhsize, 1); 2608 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2609 VREF(vp); 2610 newvp = vp; 2611 np = dnp; 2612 } else { 2613 error = nfs_nget(vp->v_mount, fhp, 2614 fhsize, &np); 2615 if (!error) 2616 newvp = NFSTOV(np); 2617 } 2618 if (!error) { 2619 const char *cp; 2620 2621 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2622 dp->d_type = 2623 IFTODT(VTTOIF(np->n_vattr->va_type)); 2624 ndp->ni_vp = newvp; 2625 cp = cnp->cn_nameptr + cnp->cn_namelen; 2626 cnp->cn_hash = 2627 namei_hash(cnp->cn_nameptr, &cp); 2628 if (cnp->cn_namelen <= NCHNAMLEN) 2629 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2630 cnp); 2631 } 2632 } 2633 } else { 2634 /* Just skip over the file handle */ 2635 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2636 i = fxdr_unsigned(int, *tl); 2637 nfsm_adv(nfsm_rndup(i)); 2638 } 2639 if (newvp != NULLVP) { 2640 if (newvp == vp) 2641 vrele(newvp); 2642 else 2643 vput(newvp); 2644 newvp = NULLVP; 2645 } 2646 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2647 more_dirs = fxdr_unsigned(int, *tl); 2648 } 2649 /* 2650 * If at end of rpc data, get the eof boolean 2651 */ 2652 if (!more_dirs) { 2653 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2654 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2655 } 2656 m_freem(mrep); 2657 } 2658 /* 2659 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2660 * by increasing d_reclen for the last record. 2661 */ 2662 if (blksiz > 0) { 2663 left = NFS_DIRFRAGSIZ - blksiz; 2664 dp->d_reclen += left; 2665 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2666 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2667 left; 2668 uiop->uio_iov->iov_len -= left; 2669 uiop->uio_resid -= left; 2670 } 2671 2672 /* 2673 * We are now either at the end of the directory or have filled the 2674 * block. 2675 */ 2676 if (bigenough) 2677 dnp->n_direofoffset = uiop->uio_offset; 2678 nfsmout: 2679 if (newvp != NULLVP) { 2680 if(newvp == vp) 2681 vrele(newvp); 2682 else 2683 vput(newvp); 2684 } 2685 return (error); 2686 } 2687 static char hextoasc[] = "0123456789abcdef"; 2688 2689 /* 2690 * Silly rename. To make the NFS filesystem that is stateless look a little 2691 * more like the "ufs" a remove of an active vnode is translated to a rename 2692 * to a funny looking filename that is removed by nfs_inactive on the 2693 * nfsnode. There is the potential for another process on a different client 2694 * to create the same funny name between the nfs_lookitup() fails and the 2695 * nfs_rename() completes, but... 2696 */ 2697 int 2698 nfs_sillyrename(dvp, vp, cnp) 2699 struct vnode *dvp, *vp; 2700 struct componentname *cnp; 2701 { 2702 struct sillyrename *sp; 2703 struct nfsnode *np; 2704 int error; 2705 short pid; 2706 2707 cache_purge(dvp); 2708 np = VTONFS(vp); 2709 #ifndef DIAGNOSTIC 2710 if (vp->v_type == VDIR) 2711 panic("nfs: sillyrename dir"); 2712 #endif 2713 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2714 M_NFSREQ, M_WAITOK); 2715 sp->s_cred = crdup(cnp->cn_cred); 2716 sp->s_dvp = dvp; 2717 VREF(dvp); 2718 2719 /* Fudge together a funny name */ 2720 pid = cnp->cn_proc->p_pid; 2721 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2722 sp->s_namlen = 12; 2723 sp->s_name[8] = hextoasc[pid & 0xf]; 2724 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2725 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2726 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2727 2728 /* Try lookitups until we get one that isn't there */ 2729 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2730 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2731 sp->s_name[4]++; 2732 if (sp->s_name[4] > 'z') { 2733 error = EINVAL; 2734 goto bad; 2735 } 2736 } 2737 error = nfs_renameit(dvp, cnp, sp); 2738 if (error) 2739 goto bad; 2740 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2741 cnp->cn_proc, &np); 2742 np->n_sillyrename = sp; 2743 return (0); 2744 bad: 2745 vrele(sp->s_dvp); 2746 crfree(sp->s_cred); 2747 free((caddr_t)sp, M_NFSREQ); 2748 return (error); 2749 } 2750 2751 /* 2752 * Look up a file name and optionally either update the file handle or 2753 * allocate an nfsnode, depending on the value of npp. 2754 * npp == NULL --> just do the lookup 2755 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2756 * handled too 2757 * *npp != NULL --> update the file handle in the vnode 2758 */ 2759 int 2760 nfs_lookitup(dvp, name, len, cred, procp, npp) 2761 struct vnode *dvp; 2762 const char *name; 2763 int len; 2764 struct ucred *cred; 2765 struct proc *procp; 2766 struct nfsnode **npp; 2767 { 2768 u_int32_t *tl; 2769 caddr_t cp; 2770 int32_t t1, t2; 2771 struct vnode *newvp = (struct vnode *)0; 2772 struct nfsnode *np, *dnp = VTONFS(dvp); 2773 caddr_t bpos, dpos, cp2; 2774 int error = 0, fhlen, attrflag; 2775 struct mbuf *mreq, *mrep, *md, *mb; 2776 nfsfh_t *nfhp; 2777 const int v3 = NFS_ISV3(dvp); 2778 2779 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2780 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2781 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2782 nfsm_fhtom(dnp, v3); 2783 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2784 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2785 if (npp && !error) { 2786 nfsm_getfh(nfhp, fhlen, v3); 2787 if (*npp) { 2788 np = *npp; 2789 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2790 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2791 np->n_fhp = &np->n_fh; 2792 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2793 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2794 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2795 np->n_fhsize = fhlen; 2796 newvp = NFSTOV(np); 2797 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2798 VREF(dvp); 2799 newvp = dvp; 2800 } else { 2801 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2802 if (error) { 2803 m_freem(mrep); 2804 return (error); 2805 } 2806 newvp = NFSTOV(np); 2807 } 2808 if (v3) { 2809 nfsm_postop_attr(newvp, attrflag, 0); 2810 if (!attrflag && *npp == NULL) { 2811 m_freem(mrep); 2812 vput(newvp); 2813 return (ENOENT); 2814 } 2815 } else 2816 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2817 } 2818 nfsm_reqdone; 2819 if (npp && *npp == NULL) { 2820 if (error) { 2821 if (newvp) 2822 vput(newvp); 2823 } else 2824 *npp = np; 2825 } 2826 return (error); 2827 } 2828 2829 /* 2830 * Nfs Version 3 commit rpc 2831 */ 2832 int 2833 nfs_commit(vp, offset, cnt, procp) 2834 struct vnode *vp; 2835 off_t offset; 2836 uint32_t cnt; 2837 struct proc *procp; 2838 { 2839 caddr_t cp; 2840 u_int32_t *tl; 2841 int32_t t1, t2; 2842 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2843 caddr_t bpos, dpos, cp2; 2844 int error = 0, wccflag = NFSV3_WCCRATTR; 2845 struct mbuf *mreq, *mrep, *md, *mb; 2846 struct nfsnode *np; 2847 2848 KASSERT(NFS_ISV3(vp)); 2849 2850 #ifdef NFS_DEBUG_COMMIT 2851 printf("commit %lu - %lu\n", (unsigned long)offset, 2852 (unsigned long)(offset + cnt)); 2853 #endif 2854 2855 simple_lock(&nmp->nm_slock); 2856 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 2857 simple_unlock(&nmp->nm_slock); 2858 return (0); 2859 } 2860 simple_unlock(&nmp->nm_slock); 2861 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2862 np = VTONFS(vp); 2863 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 2864 nfsm_fhtom(np, 1); 2865 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2866 txdr_hyper(offset, tl); 2867 tl += 2; 2868 *tl = txdr_unsigned(cnt); 2869 nfsm_request(np, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2870 nfsm_wcc_data(vp, wccflag, 0); 2871 if (!error) { 2872 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2873 simple_lock(&nmp->nm_slock); 2874 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 2875 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 2876 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 2877 error = NFSERR_STALEWRITEVERF; 2878 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 2879 } 2880 simple_unlock(&nmp->nm_slock); 2881 } 2882 nfsm_reqdone; 2883 return (error); 2884 } 2885 2886 /* 2887 * Kludge City.. 2888 * - make nfs_bmap() essentially a no-op that does no translation 2889 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2890 * (Maybe I could use the process's page mapping, but I was concerned that 2891 * Kernel Write might not be enabled and also figured copyout() would do 2892 * a lot more work than memcpy() and also it currently happens in the 2893 * context of the swapper process (2). 2894 */ 2895 int 2896 nfs_bmap(v) 2897 void *v; 2898 { 2899 struct vop_bmap_args /* { 2900 struct vnode *a_vp; 2901 daddr_t a_bn; 2902 struct vnode **a_vpp; 2903 daddr_t *a_bnp; 2904 int *a_runp; 2905 } */ *ap = v; 2906 struct vnode *vp = ap->a_vp; 2907 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2908 2909 if (ap->a_vpp != NULL) 2910 *ap->a_vpp = vp; 2911 if (ap->a_bnp != NULL) 2912 *ap->a_bnp = ap->a_bn << bshift; 2913 if (ap->a_runp != NULL) 2914 *ap->a_runp = 1024 * 1024; /* XXX */ 2915 return (0); 2916 } 2917 2918 /* 2919 * Strategy routine. 2920 * For async requests when nfsiod(s) are running, queue the request by 2921 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2922 * request. 2923 */ 2924 int 2925 nfs_strategy(v) 2926 void *v; 2927 { 2928 struct vop_strategy_args *ap = v; 2929 struct buf *bp = ap->a_bp; 2930 struct proc *p; 2931 int error = 0; 2932 2933 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2934 panic("nfs physio/async"); 2935 if (bp->b_flags & B_ASYNC) 2936 p = NULL; 2937 else 2938 p = curproc; /* XXX */ 2939 2940 /* 2941 * If the op is asynchronous and an i/o daemon is waiting 2942 * queue the request, wake it up and wait for completion 2943 * otherwise just do it ourselves. 2944 */ 2945 2946 if ((bp->b_flags & B_ASYNC) == 0 || 2947 nfs_asyncio(bp)) 2948 error = nfs_doio(bp, p); 2949 return (error); 2950 } 2951 2952 /* 2953 * fsync vnode op. Just call nfs_flush() with commit == 1. 2954 */ 2955 /* ARGSUSED */ 2956 int 2957 nfs_fsync(v) 2958 void *v; 2959 { 2960 struct vop_fsync_args /* { 2961 struct vnodeop_desc *a_desc; 2962 struct vnode * a_vp; 2963 struct ucred * a_cred; 2964 int a_flags; 2965 off_t offlo; 2966 off_t offhi; 2967 struct proc * a_p; 2968 } */ *ap = v; 2969 2970 return (nfs_flush(ap->a_vp, ap->a_cred, 2971 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2972 } 2973 2974 /* 2975 * Flush all the data associated with a vnode. 2976 */ 2977 int 2978 nfs_flush(vp, cred, waitfor, p, commit) 2979 struct vnode *vp; 2980 struct ucred *cred; 2981 int waitfor; 2982 struct proc *p; 2983 int commit; 2984 { 2985 struct nfsnode *np = VTONFS(vp); 2986 int error; 2987 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2988 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2989 2990 simple_lock(&vp->v_interlock); 2991 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2992 if (np->n_flag & NWRITEERR) { 2993 error = np->n_error; 2994 np->n_flag &= ~NWRITEERR; 2995 } 2996 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2997 return (error); 2998 } 2999 3000 /* 3001 * Return POSIX pathconf information applicable to nfs. 3002 * 3003 * N.B. The NFS V2 protocol doesn't support this RPC. 3004 */ 3005 /* ARGSUSED */ 3006 int 3007 nfs_pathconf(v) 3008 void *v; 3009 { 3010 struct vop_pathconf_args /* { 3011 struct vnode *a_vp; 3012 int a_name; 3013 register_t *a_retval; 3014 } */ *ap = v; 3015 struct nfsv3_pathconf *pcp; 3016 struct vnode *vp = ap->a_vp; 3017 struct mbuf *mreq, *mrep, *md, *mb; 3018 int32_t t1, t2; 3019 u_int32_t *tl; 3020 caddr_t bpos, dpos, cp, cp2; 3021 int error = 0, attrflag; 3022 #ifndef NFS_V2_ONLY 3023 struct nfsmount *nmp; 3024 unsigned int l; 3025 u_int64_t maxsize; 3026 #endif 3027 const int v3 = NFS_ISV3(vp); 3028 struct nfsnode *np = VTONFS(vp); 3029 3030 switch (ap->a_name) { 3031 /* Names that can be resolved locally. */ 3032 case _PC_PIPE_BUF: 3033 *ap->a_retval = PIPE_BUF; 3034 break; 3035 case _PC_SYNC_IO: 3036 *ap->a_retval = 1; 3037 break; 3038 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3039 case _PC_LINK_MAX: 3040 case _PC_NAME_MAX: 3041 case _PC_CHOWN_RESTRICTED: 3042 case _PC_NO_TRUNC: 3043 if (!v3) { 3044 error = EINVAL; 3045 break; 3046 } 3047 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3048 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3049 nfsm_fhtom(np, 1); 3050 nfsm_request(np, NFSPROC_PATHCONF, 3051 curproc, curproc->p_ucred); /* XXX */ 3052 nfsm_postop_attr(vp, attrflag, 0); 3053 if (!error) { 3054 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3055 NFSX_V3PATHCONF); 3056 switch (ap->a_name) { 3057 case _PC_LINK_MAX: 3058 *ap->a_retval = 3059 fxdr_unsigned(register_t, pcp->pc_linkmax); 3060 break; 3061 case _PC_NAME_MAX: 3062 *ap->a_retval = 3063 fxdr_unsigned(register_t, pcp->pc_namemax); 3064 break; 3065 case _PC_CHOWN_RESTRICTED: 3066 *ap->a_retval = 3067 (pcp->pc_chownrestricted == nfs_true); 3068 break; 3069 case _PC_NO_TRUNC: 3070 *ap->a_retval = 3071 (pcp->pc_notrunc == nfs_true); 3072 break; 3073 } 3074 } 3075 nfsm_reqdone; 3076 break; 3077 case _PC_FILESIZEBITS: 3078 #ifndef NFS_V2_ONLY 3079 if (v3) { 3080 nmp = VFSTONFS(vp->v_mount); 3081 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3082 if ((error = nfs_fsinfo(nmp, vp, 3083 curproc->p_ucred, curproc)) != 0) /* XXX */ 3084 break; 3085 for (l = 0, maxsize = nmp->nm_maxfilesize; 3086 (maxsize >> l) > 0; l++) 3087 ; 3088 *ap->a_retval = l + 1; 3089 } else 3090 #endif 3091 { 3092 *ap->a_retval = 32; /* NFS V2 limitation */ 3093 } 3094 break; 3095 default: 3096 error = EINVAL; 3097 break; 3098 } 3099 3100 return (error); 3101 } 3102 3103 /* 3104 * NFS advisory byte-level locks. 3105 */ 3106 int 3107 nfs_advlock(v) 3108 void *v; 3109 { 3110 struct vop_advlock_args /* { 3111 struct vnode *a_vp; 3112 caddr_t a_id; 3113 int a_op; 3114 struct flock *a_fl; 3115 int a_flags; 3116 } */ *ap = v; 3117 struct nfsnode *np = VTONFS(ap->a_vp); 3118 3119 return lf_advlock(ap, &np->n_lockf, np->n_size); 3120 } 3121 3122 /* 3123 * Print out the contents of an nfsnode. 3124 */ 3125 int 3126 nfs_print(v) 3127 void *v; 3128 { 3129 struct vop_print_args /* { 3130 struct vnode *a_vp; 3131 } */ *ap = v; 3132 struct vnode *vp = ap->a_vp; 3133 struct nfsnode *np = VTONFS(vp); 3134 3135 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3136 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3137 if (vp->v_type == VFIFO) 3138 fifo_printinfo(vp); 3139 printf("\n"); 3140 return (0); 3141 } 3142 3143 /* 3144 * NFS file truncation. 3145 */ 3146 int 3147 nfs_truncate(v) 3148 void *v; 3149 { 3150 #if 0 3151 struct vop_truncate_args /* { 3152 struct vnode *a_vp; 3153 off_t a_length; 3154 int a_flags; 3155 struct ucred *a_cred; 3156 struct proc *a_p; 3157 } */ *ap = v; 3158 #endif 3159 3160 /* Use nfs_setattr */ 3161 return (EOPNOTSUPP); 3162 } 3163 3164 /* 3165 * NFS update. 3166 */ 3167 int 3168 nfs_update(v) 3169 void *v; 3170 #if 0 3171 struct vop_update_args /* { 3172 struct vnode *a_vp; 3173 struct timespec *a_ta; 3174 struct timespec *a_tm; 3175 int a_waitfor; 3176 } */ *ap = v; 3177 #endif 3178 { 3179 3180 /* Use nfs_setattr */ 3181 return (EOPNOTSUPP); 3182 } 3183 3184 /* 3185 * Just call bwrite(). 3186 */ 3187 int 3188 nfs_bwrite(v) 3189 void *v; 3190 { 3191 struct vop_bwrite_args /* { 3192 struct vnode *a_bp; 3193 } */ *ap = v; 3194 3195 return (bwrite(ap->a_bp)); 3196 } 3197 3198 /* 3199 * nfs unlock wrapper. 3200 */ 3201 int 3202 nfs_unlock(void *v) 3203 { 3204 struct vop_unlock_args /* { 3205 struct vnode *a_vp; 3206 int a_flags; 3207 } */ *ap = v; 3208 struct vnode *vp = ap->a_vp; 3209 3210 /* 3211 * VOP_UNLOCK can be called by nfs_loadattrcache 3212 * with v_data == 0. 3213 */ 3214 if (VTONFS(vp)) { 3215 nfs_delayedtruncate(vp); 3216 } 3217 3218 return genfs_unlock(v); 3219 } 3220 3221 /* 3222 * nfs special file access vnode op. 3223 * Essentially just get vattr and then imitate iaccess() since the device is 3224 * local to the client. 3225 */ 3226 int 3227 nfsspec_access(v) 3228 void *v; 3229 { 3230 struct vop_access_args /* { 3231 struct vnode *a_vp; 3232 int a_mode; 3233 struct ucred *a_cred; 3234 struct proc *a_p; 3235 } */ *ap = v; 3236 struct vattr va; 3237 struct vnode *vp = ap->a_vp; 3238 int error; 3239 3240 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3241 if (error) 3242 return (error); 3243 3244 /* 3245 * Disallow write attempts on filesystems mounted read-only; 3246 * unless the file is a socket, fifo, or a block or character 3247 * device resident on the filesystem. 3248 */ 3249 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3250 switch (vp->v_type) { 3251 case VREG: 3252 case VDIR: 3253 case VLNK: 3254 return (EROFS); 3255 default: 3256 break; 3257 } 3258 } 3259 3260 return (vaccess(va.va_type, va.va_mode, 3261 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3262 } 3263 3264 /* 3265 * Read wrapper for special devices. 3266 */ 3267 int 3268 nfsspec_read(v) 3269 void *v; 3270 { 3271 struct vop_read_args /* { 3272 struct vnode *a_vp; 3273 struct uio *a_uio; 3274 int a_ioflag; 3275 struct ucred *a_cred; 3276 } */ *ap = v; 3277 struct nfsnode *np = VTONFS(ap->a_vp); 3278 3279 /* 3280 * Set access flag. 3281 */ 3282 np->n_flag |= NACC; 3283 np->n_atim.tv_sec = time.tv_sec; 3284 np->n_atim.tv_nsec = time.tv_usec * 1000; 3285 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3286 } 3287 3288 /* 3289 * Write wrapper for special devices. 3290 */ 3291 int 3292 nfsspec_write(v) 3293 void *v; 3294 { 3295 struct vop_write_args /* { 3296 struct vnode *a_vp; 3297 struct uio *a_uio; 3298 int a_ioflag; 3299 struct ucred *a_cred; 3300 } */ *ap = v; 3301 struct nfsnode *np = VTONFS(ap->a_vp); 3302 3303 /* 3304 * Set update flag. 3305 */ 3306 np->n_flag |= NUPD; 3307 np->n_mtim.tv_sec = time.tv_sec; 3308 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3309 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3310 } 3311 3312 /* 3313 * Close wrapper for special devices. 3314 * 3315 * Update the times on the nfsnode then do device close. 3316 */ 3317 int 3318 nfsspec_close(v) 3319 void *v; 3320 { 3321 struct vop_close_args /* { 3322 struct vnode *a_vp; 3323 int a_fflag; 3324 struct ucred *a_cred; 3325 struct proc *a_p; 3326 } */ *ap = v; 3327 struct vnode *vp = ap->a_vp; 3328 struct nfsnode *np = VTONFS(vp); 3329 struct vattr vattr; 3330 3331 if (np->n_flag & (NACC | NUPD)) { 3332 np->n_flag |= NCHG; 3333 if (vp->v_usecount == 1 && 3334 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3335 VATTR_NULL(&vattr); 3336 if (np->n_flag & NACC) 3337 vattr.va_atime = np->n_atim; 3338 if (np->n_flag & NUPD) 3339 vattr.va_mtime = np->n_mtim; 3340 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3341 } 3342 } 3343 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3344 } 3345 3346 /* 3347 * Read wrapper for fifos. 3348 */ 3349 int 3350 nfsfifo_read(v) 3351 void *v; 3352 { 3353 struct vop_read_args /* { 3354 struct vnode *a_vp; 3355 struct uio *a_uio; 3356 int a_ioflag; 3357 struct ucred *a_cred; 3358 } */ *ap = v; 3359 struct nfsnode *np = VTONFS(ap->a_vp); 3360 3361 /* 3362 * Set access flag. 3363 */ 3364 np->n_flag |= NACC; 3365 np->n_atim.tv_sec = time.tv_sec; 3366 np->n_atim.tv_nsec = time.tv_usec * 1000; 3367 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3368 } 3369 3370 /* 3371 * Write wrapper for fifos. 3372 */ 3373 int 3374 nfsfifo_write(v) 3375 void *v; 3376 { 3377 struct vop_write_args /* { 3378 struct vnode *a_vp; 3379 struct uio *a_uio; 3380 int a_ioflag; 3381 struct ucred *a_cred; 3382 } */ *ap = v; 3383 struct nfsnode *np = VTONFS(ap->a_vp); 3384 3385 /* 3386 * Set update flag. 3387 */ 3388 np->n_flag |= NUPD; 3389 np->n_mtim.tv_sec = time.tv_sec; 3390 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3391 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3392 } 3393 3394 /* 3395 * Close wrapper for fifos. 3396 * 3397 * Update the times on the nfsnode then do fifo close. 3398 */ 3399 int 3400 nfsfifo_close(v) 3401 void *v; 3402 { 3403 struct vop_close_args /* { 3404 struct vnode *a_vp; 3405 int a_fflag; 3406 struct ucred *a_cred; 3407 struct proc *a_p; 3408 } */ *ap = v; 3409 struct vnode *vp = ap->a_vp; 3410 struct nfsnode *np = VTONFS(vp); 3411 struct vattr vattr; 3412 3413 if (np->n_flag & (NACC | NUPD)) { 3414 if (np->n_flag & NACC) { 3415 np->n_atim.tv_sec = time.tv_sec; 3416 np->n_atim.tv_nsec = time.tv_usec * 1000; 3417 } 3418 if (np->n_flag & NUPD) { 3419 np->n_mtim.tv_sec = time.tv_sec; 3420 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3421 } 3422 np->n_flag |= NCHG; 3423 if (vp->v_usecount == 1 && 3424 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3425 VATTR_NULL(&vattr); 3426 if (np->n_flag & NACC) 3427 vattr.va_atime = np->n_atim; 3428 if (np->n_flag & NUPD) 3429 vattr.va_mtime = np->n_mtim; 3430 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3431 } 3432 } 3433 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3434 } 3435
Indexes created Thu Sep 25 02:09:54 GMT 2025