1 /* $NetBSD: nfs_vnops.c,v 1.126 2000/12/12 17:13:17 chs 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 "opt_nfs.h" 46 #include "opt_uvmhist.h" 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/resourcevar.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/malloc.h> 57 #include <sys/mbuf.h> 58 #include <sys/namei.h> 59 #include <sys/vnode.h> 60 #include <sys/dirent.h> 61 #include <sys/fcntl.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/unistd.h> 65 66 #include <uvm/uvm_extern.h> 67 #include <uvm/uvm.h> 68 69 #include <miscfs/fifofs/fifo.h> 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsproto.h> 75 #include <nfs/nfs.h> 76 #include <nfs/nfsnode.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/xdr_subs.h> 79 #include <nfs/nfsm_subs.h> 80 #include <nfs/nqnfs.h> 81 #include <nfs/nfs_var.h> 82 83 #include <net/if.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 87 /* Defs */ 88 #define TRUE 1 89 #define FALSE 0 90 91 /* 92 * Global vfs data structures for nfs 93 */ 94 int (**nfsv2_vnodeop_p) __P((void *)); 95 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_revoke_desc, nfs_revoke }, /* revoke */ 112 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 113 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 114 { &vop_seek_desc, nfs_seek }, /* seek */ 115 { &vop_remove_desc, nfs_remove }, /* remove */ 116 { &vop_link_desc, nfs_link }, /* link */ 117 { &vop_rename_desc, nfs_rename }, /* rename */ 118 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 119 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 120 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 121 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 122 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 123 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 124 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 125 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 126 { &vop_lock_desc, nfs_lock }, /* lock */ 127 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 128 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 129 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 130 { &vop_print_desc, nfs_print }, /* print */ 131 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 132 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 133 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 134 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 135 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 136 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 137 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 138 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 139 { &vop_update_desc, nfs_update }, /* update */ 140 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 141 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 142 { &vop_putpages_desc, nfs_putpages }, /* putpages */ 143 { NULL, NULL } 144 }; 145 struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 146 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 147 148 /* 149 * Special device vnode ops 150 */ 151 int (**spec_nfsv2nodeop_p) __P((void *)); 152 struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 153 { &vop_default_desc, vn_default_error }, 154 { &vop_lookup_desc, spec_lookup }, /* lookup */ 155 { &vop_create_desc, spec_create }, /* create */ 156 { &vop_mknod_desc, spec_mknod }, /* mknod */ 157 { &vop_open_desc, spec_open }, /* open */ 158 { &vop_close_desc, nfsspec_close }, /* close */ 159 { &vop_access_desc, nfsspec_access }, /* access */ 160 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 161 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 162 { &vop_read_desc, nfsspec_read }, /* read */ 163 { &vop_write_desc, nfsspec_write }, /* write */ 164 { &vop_lease_desc, spec_lease_check }, /* lease */ 165 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 166 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 167 { &vop_poll_desc, spec_poll }, /* poll */ 168 { &vop_revoke_desc, spec_revoke }, /* revoke */ 169 { &vop_mmap_desc, spec_mmap }, /* mmap */ 170 { &vop_fsync_desc, spec_fsync }, /* fsync */ 171 { &vop_seek_desc, spec_seek }, /* seek */ 172 { &vop_remove_desc, spec_remove }, /* remove */ 173 { &vop_link_desc, spec_link }, /* link */ 174 { &vop_rename_desc, spec_rename }, /* rename */ 175 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 176 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 177 { &vop_symlink_desc, spec_symlink }, /* symlink */ 178 { &vop_readdir_desc, spec_readdir }, /* readdir */ 179 { &vop_readlink_desc, spec_readlink }, /* readlink */ 180 { &vop_abortop_desc, spec_abortop }, /* abortop */ 181 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 182 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 183 { &vop_lock_desc, nfs_lock }, /* lock */ 184 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 185 { &vop_bmap_desc, spec_bmap }, /* bmap */ 186 { &vop_strategy_desc, spec_strategy }, /* strategy */ 187 { &vop_print_desc, nfs_print }, /* print */ 188 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 189 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 190 { &vop_advlock_desc, spec_advlock }, /* advlock */ 191 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 192 { &vop_valloc_desc, spec_valloc }, /* valloc */ 193 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 194 { &vop_vfree_desc, spec_vfree }, /* vfree */ 195 { &vop_truncate_desc, spec_truncate }, /* truncate */ 196 { &vop_update_desc, nfs_update }, /* update */ 197 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 198 { NULL, NULL } 199 }; 200 struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 201 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 202 203 int (**fifo_nfsv2nodeop_p) __P((void *)); 204 struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 205 { &vop_default_desc, vn_default_error }, 206 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 207 { &vop_create_desc, fifo_create }, /* create */ 208 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 209 { &vop_open_desc, fifo_open }, /* open */ 210 { &vop_close_desc, nfsfifo_close }, /* close */ 211 { &vop_access_desc, nfsspec_access }, /* access */ 212 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 213 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 214 { &vop_read_desc, nfsfifo_read }, /* read */ 215 { &vop_write_desc, nfsfifo_write }, /* write */ 216 { &vop_lease_desc, fifo_lease_check }, /* lease */ 217 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 218 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 219 { &vop_poll_desc, fifo_poll }, /* poll */ 220 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 221 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 222 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 223 { &vop_seek_desc, fifo_seek }, /* seek */ 224 { &vop_remove_desc, fifo_remove }, /* remove */ 225 { &vop_link_desc, fifo_link }, /* link */ 226 { &vop_rename_desc, fifo_rename }, /* rename */ 227 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 228 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 229 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 230 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 231 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 232 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 233 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 234 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 235 { &vop_lock_desc, nfs_lock }, /* lock */ 236 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 237 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 238 { &vop_strategy_desc, genfs_badop }, /* strategy */ 239 { &vop_print_desc, nfs_print }, /* print */ 240 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 241 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 242 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 243 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 244 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 245 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 246 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 247 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 248 { &vop_update_desc, nfs_update }, /* update */ 249 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 250 { NULL, NULL } 251 }; 252 struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 253 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 254 255 /* 256 * Global variables 257 */ 258 extern u_int32_t nfs_true, nfs_false; 259 extern u_int32_t nfs_xdrneg1; 260 extern struct nfsstats nfsstats; 261 extern nfstype nfsv3_type[9]; 262 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 263 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 264 int nfs_numasync = 0; 265 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 266 267 /* 268 * nfs null call from vfs. 269 */ 270 int 271 nfs_null(vp, cred, procp) 272 struct vnode *vp; 273 struct ucred *cred; 274 struct proc *procp; 275 { 276 caddr_t bpos, dpos; 277 int error = 0; 278 struct mbuf *mreq, *mrep, *md, *mb; 279 280 nfsm_reqhead(vp, NFSPROC_NULL, 0); 281 nfsm_request(vp, NFSPROC_NULL, procp, cred); 282 nfsm_reqdone; 283 return (error); 284 } 285 286 /* 287 * nfs access vnode op. 288 * For nfs version 2, just return ok. File accesses may fail later. 289 * For nfs version 3, use the access rpc to check accessibility. If file modes 290 * are changed on the server, accesses might still fail later. 291 */ 292 int 293 nfs_access(v) 294 void *v; 295 { 296 struct vop_access_args /* { 297 struct vnode *a_vp; 298 int a_mode; 299 struct ucred *a_cred; 300 struct proc *a_p; 301 } */ *ap = v; 302 struct vnode *vp = ap->a_vp; 303 u_int32_t *tl; 304 caddr_t cp; 305 int32_t t1, t2; 306 caddr_t bpos, dpos, cp2; 307 int error = 0, attrflag, cachevalid; 308 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 309 u_int32_t mode, rmode; 310 const int v3 = NFS_ISV3(vp); 311 struct nfsnode *np = VTONFS(vp); 312 313 cachevalid = (np->n_accstamp != -1 && 314 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 315 np->n_accuid == ap->a_cred->cr_uid); 316 317 /* 318 * Check access cache first. If this request has been made for this 319 * uid shortly before, use the cached result. 320 */ 321 if (cachevalid) { 322 if (!np->n_accerror) { 323 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 324 return np->n_accerror; 325 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 326 return np->n_accerror; 327 } 328 329 /* 330 * For nfs v3, do an access rpc, otherwise you are stuck emulating 331 * ufs_access() locally using the vattr. This may not be correct, 332 * since the server may apply other access criteria such as 333 * client uid-->server uid mapping that we do not know about, but 334 * this is better than just returning anything that is lying about 335 * in the cache. 336 */ 337 if (v3) { 338 nfsstats.rpccnt[NFSPROC_ACCESS]++; 339 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 340 nfsm_fhtom(vp, v3); 341 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 342 if (ap->a_mode & VREAD) 343 mode = NFSV3ACCESS_READ; 344 else 345 mode = 0; 346 if (vp->v_type != VDIR) { 347 if (ap->a_mode & VWRITE) 348 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 349 if (ap->a_mode & VEXEC) 350 mode |= NFSV3ACCESS_EXECUTE; 351 } else { 352 if (ap->a_mode & VWRITE) 353 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 354 NFSV3ACCESS_DELETE); 355 if (ap->a_mode & VEXEC) 356 mode |= NFSV3ACCESS_LOOKUP; 357 } 358 *tl = txdr_unsigned(mode); 359 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 360 nfsm_postop_attr(vp, attrflag); 361 if (!error) { 362 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 363 rmode = fxdr_unsigned(u_int32_t, *tl); 364 /* 365 * The NFS V3 spec does not clarify whether or not 366 * the returned access bits can be a superset of 367 * the ones requested, so... 368 */ 369 if ((rmode & mode) != mode) 370 error = EACCES; 371 } 372 nfsm_reqdone; 373 } else 374 return (nfsspec_access(ap)); 375 /* 376 * Disallow write attempts on filesystems mounted read-only; 377 * unless the file is a socket, fifo, or a block or character 378 * device resident on the filesystem. 379 */ 380 if (!error && (ap->a_mode & VWRITE) && 381 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 382 switch (vp->v_type) { 383 case VREG: 384 case VDIR: 385 case VLNK: 386 error = EROFS; 387 default: 388 break; 389 } 390 } 391 392 if (!error || error == EACCES) { 393 /* 394 * If we got the same result as for a previous, 395 * different request, OR it in. Don't update 396 * the timestamp in that case. 397 */ 398 if (cachevalid && error == np->n_accerror) { 399 if (!error) 400 np->n_accmode |= ap->a_mode; 401 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 402 np->n_accmode = ap->a_mode; 403 } else { 404 np->n_accstamp = time.tv_sec; 405 np->n_accuid = ap->a_cred->cr_uid; 406 np->n_accmode = ap->a_mode; 407 np->n_accerror = error; 408 } 409 } 410 411 return (error); 412 } 413 414 /* 415 * nfs open vnode op 416 * Check to see if the type is ok 417 * and that deletion is not in progress. 418 * For paged in text files, you will need to flush the page cache 419 * if consistency is lost. 420 */ 421 /* ARGSUSED */ 422 int 423 nfs_open(v) 424 void *v; 425 { 426 struct vop_open_args /* { 427 struct vnode *a_vp; 428 int a_mode; 429 struct ucred *a_cred; 430 struct proc *a_p; 431 } */ *ap = v; 432 struct vnode *vp = ap->a_vp; 433 struct nfsnode *np = VTONFS(vp); 434 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 435 struct vattr vattr; 436 int error; 437 438 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 439 return (EACCES); 440 } 441 442 /* 443 * Initialize read and write creds here, for swapfiles 444 * and other paths that don't set the creds themselves. 445 */ 446 447 if (ap->a_mode & FREAD) { 448 if (np->n_rcred) { 449 crfree(np->n_rcred); 450 } 451 np->n_rcred = ap->a_cred; 452 crhold(np->n_rcred); 453 } 454 if (ap->a_mode & FWRITE) { 455 if (np->n_wcred) { 456 crfree(np->n_wcred); 457 } 458 np->n_wcred = ap->a_cred; 459 crhold(np->n_wcred); 460 } 461 462 #ifndef NFS_V2_ONLY 463 /* 464 * Get a valid lease. If cached data is stale, flush it. 465 */ 466 if (nmp->nm_flag & NFSMNT_NQNFS) { 467 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 468 do { 469 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 470 ap->a_p); 471 } while (error == NQNFS_EXPIRED); 472 if (error) 473 return (error); 474 if (np->n_lrev != np->n_brev || 475 (np->n_flag & NQNFSNONCACHE)) { 476 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 477 ap->a_p, 1)) == EINTR) 478 return (error); 479 np->n_brev = np->n_lrev; 480 } 481 } 482 } else 483 #endif 484 { 485 if (np->n_flag & NMODIFIED) { 486 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 487 ap->a_p, 1)) == EINTR) 488 return (error); 489 np->n_attrstamp = 0; 490 if (vp->v_type == VDIR) { 491 nfs_invaldircache(vp, 0); 492 np->n_direofoffset = 0; 493 } 494 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 495 if (error) 496 return (error); 497 np->n_mtime = vattr.va_mtime.tv_sec; 498 } else { 499 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 500 if (error) 501 return (error); 502 if (np->n_mtime != vattr.va_mtime.tv_sec) { 503 if (vp->v_type == VDIR) { 504 nfs_invaldircache(vp, 0); 505 np->n_direofoffset = 0; 506 } 507 if ((error = nfs_vinvalbuf(vp, V_SAVE, 508 ap->a_cred, ap->a_p, 1)) == EINTR) 509 return (error); 510 np->n_mtime = vattr.va_mtime.tv_sec; 511 } 512 } 513 } 514 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 515 np->n_attrstamp = 0; /* For Open/Close consistency */ 516 return (0); 517 } 518 519 /* 520 * nfs close vnode op 521 * What an NFS client should do upon close after writing is a debatable issue. 522 * Most NFS clients push delayed writes to the server upon close, basically for 523 * two reasons: 524 * 1 - So that any write errors may be reported back to the client process 525 * doing the close system call. By far the two most likely errors are 526 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 527 * 2 - To put a worst case upper bound on cache inconsistency between 528 * multiple clients for the file. 529 * There is also a consistency problem for Version 2 of the protocol w.r.t. 530 * not being able to tell if other clients are writing a file concurrently, 531 * since there is no way of knowing if the changed modify time in the reply 532 * is only due to the write for this client. 533 * (NFS Version 3 provides weak cache consistency data in the reply that 534 * should be sufficient to detect and handle this case.) 535 * 536 * The current code does the following: 537 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 538 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 539 * or commit them (this satisfies 1 and 2 except for the 540 * case where the server crashes after this close but 541 * before the commit RPC, which is felt to be "good 542 * enough". Changing the last argument to nfs_flush() to 543 * a 1 would force a commit operation, if it is felt a 544 * commit is necessary now. 545 * for NQNFS - do nothing now, since 2 is dealt with via leases and 546 * 1 should be dealt with via an fsync() system call for 547 * cases where write errors are important. 548 */ 549 /* ARGSUSED */ 550 int 551 nfs_close(v) 552 void *v; 553 { 554 struct vop_close_args /* { 555 struct vnodeop_desc *a_desc; 556 struct vnode *a_vp; 557 int a_fflag; 558 struct ucred *a_cred; 559 struct proc *a_p; 560 } */ *ap = v; 561 struct vnode *vp = ap->a_vp; 562 struct nfsnode *np = VTONFS(vp); 563 int error = 0; 564 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 565 566 if (vp->v_type == VREG) { 567 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 568 (np->n_flag & NMODIFIED)) { 569 if (NFS_ISV3(vp)) { 570 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 571 np->n_flag &= ~NMODIFIED; 572 } else 573 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 574 np->n_attrstamp = 0; 575 } 576 if (np->n_flag & NWRITEERR) { 577 np->n_flag &= ~NWRITEERR; 578 error = np->n_error; 579 } 580 } 581 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 582 return (error); 583 } 584 585 /* 586 * nfs getattr call from vfs. 587 */ 588 int 589 nfs_getattr(v) 590 void *v; 591 { 592 struct vop_getattr_args /* { 593 struct vnode *a_vp; 594 struct vattr *a_vap; 595 struct ucred *a_cred; 596 struct proc *a_p; 597 } */ *ap = v; 598 struct vnode *vp = ap->a_vp; 599 struct nfsnode *np = VTONFS(vp); 600 caddr_t cp; 601 u_int32_t *tl; 602 int32_t t1, t2; 603 caddr_t bpos, dpos; 604 int error = 0; 605 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 606 const int v3 = NFS_ISV3(vp); 607 608 /* 609 * Update local times for special files. 610 */ 611 if (np->n_flag & (NACC | NUPD)) 612 np->n_flag |= NCHG; 613 /* 614 * First look in the cache. 615 */ 616 if (nfs_getattrcache(vp, ap->a_vap) == 0) 617 return (0); 618 nfsstats.rpccnt[NFSPROC_GETATTR]++; 619 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 620 nfsm_fhtom(vp, v3); 621 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 622 if (!error) { 623 nfsm_loadattr(vp, ap->a_vap); 624 if (vp->v_type == VDIR && 625 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 626 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 627 } 628 nfsm_reqdone; 629 return (error); 630 } 631 632 /* 633 * nfs setattr call. 634 */ 635 int 636 nfs_setattr(v) 637 void *v; 638 { 639 struct vop_setattr_args /* { 640 struct vnodeop_desc *a_desc; 641 struct vnode *a_vp; 642 struct vattr *a_vap; 643 struct ucred *a_cred; 644 struct proc *a_p; 645 } */ *ap = v; 646 struct vnode *vp = ap->a_vp; 647 struct nfsnode *np = VTONFS(vp); 648 struct vattr *vap = ap->a_vap; 649 int error = 0; 650 u_quad_t tsize = 0; 651 652 /* 653 * Setting of flags is not supported. 654 */ 655 if (vap->va_flags != VNOVAL) 656 return (EOPNOTSUPP); 657 658 /* 659 * Disallow write attempts if the filesystem is mounted read-only. 660 */ 661 if ((vap->va_uid != (uid_t)VNOVAL || 662 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 663 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 664 (vp->v_mount->mnt_flag & MNT_RDONLY)) 665 return (EROFS); 666 if (vap->va_size != VNOVAL) { 667 switch (vp->v_type) { 668 case VDIR: 669 return (EISDIR); 670 case VCHR: 671 case VBLK: 672 case VSOCK: 673 case VFIFO: 674 if (vap->va_mtime.tv_sec == VNOVAL && 675 vap->va_atime.tv_sec == VNOVAL && 676 vap->va_mode == (mode_t)VNOVAL && 677 vap->va_uid == (uid_t)VNOVAL && 678 vap->va_gid == (gid_t)VNOVAL) 679 return (0); 680 vap->va_size = VNOVAL; 681 break; 682 default: 683 /* 684 * Disallow write attempts if the filesystem is 685 * mounted read-only. 686 */ 687 if (vp->v_mount->mnt_flag & MNT_RDONLY) 688 return (EROFS); 689 uvm_vnp_setsize(vp, vap->va_size); 690 if (vap->va_size == 0) 691 error = nfs_vinvalbuf(vp, 0, 692 ap->a_cred, ap->a_p, 1); 693 else 694 error = nfs_vinvalbuf(vp, V_SAVE, 695 ap->a_cred, ap->a_p, 1); 696 if (error) { 697 uvm_vnp_setsize(vp, np->n_size); 698 return (error); 699 } 700 tsize = np->n_size; 701 np->n_size = np->n_vattr->va_size = vap->va_size; 702 } 703 } else if ((vap->va_mtime.tv_sec != VNOVAL || 704 vap->va_atime.tv_sec != VNOVAL) && 705 vp->v_type == VREG && 706 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 707 ap->a_p, 1)) == EINTR) 708 return (error); 709 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 710 if (error && vap->va_size != VNOVAL) { 711 np->n_size = np->n_vattr->va_size = tsize; 712 uvm_vnp_setsize(vp, np->n_size); 713 } 714 return (error); 715 } 716 717 /* 718 * Do an nfs setattr rpc. 719 */ 720 int 721 nfs_setattrrpc(vp, vap, cred, procp) 722 struct vnode *vp; 723 struct vattr *vap; 724 struct ucred *cred; 725 struct proc *procp; 726 { 727 struct nfsv2_sattr *sp; 728 caddr_t cp; 729 int32_t t1, t2; 730 caddr_t bpos, dpos, cp2; 731 u_int32_t *tl; 732 int error = 0, wccflag = NFSV3_WCCRATTR; 733 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 734 const int v3 = NFS_ISV3(vp); 735 736 nfsstats.rpccnt[NFSPROC_SETATTR]++; 737 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 738 nfsm_fhtom(vp, v3); 739 if (v3) { 740 nfsm_v3attrbuild(vap, TRUE); 741 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 742 *tl = nfs_false; 743 } else { 744 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 745 if (vap->va_mode == (mode_t)VNOVAL) 746 sp->sa_mode = nfs_xdrneg1; 747 else 748 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 749 if (vap->va_uid == (uid_t)VNOVAL) 750 sp->sa_uid = nfs_xdrneg1; 751 else 752 sp->sa_uid = txdr_unsigned(vap->va_uid); 753 if (vap->va_gid == (gid_t)VNOVAL) 754 sp->sa_gid = nfs_xdrneg1; 755 else 756 sp->sa_gid = txdr_unsigned(vap->va_gid); 757 sp->sa_size = txdr_unsigned(vap->va_size); 758 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 759 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 760 } 761 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 762 if (v3) { 763 nfsm_wcc_data(vp, wccflag); 764 } else 765 nfsm_loadattr(vp, (struct vattr *)0); 766 nfsm_reqdone; 767 return (error); 768 } 769 770 /* 771 * nfs lookup call, one step at a time... 772 * First look in cache 773 * If not found, unlock the directory nfsnode and do the rpc 774 */ 775 int 776 nfs_lookup(v) 777 void *v; 778 { 779 struct vop_lookup_args /* { 780 struct vnodeop_desc *a_desc; 781 struct vnode *a_dvp; 782 struct vnode **a_vpp; 783 struct componentname *a_cnp; 784 } */ *ap = v; 785 struct componentname *cnp = ap->a_cnp; 786 struct vnode *dvp = ap->a_dvp; 787 struct vnode **vpp = ap->a_vpp; 788 int flags; 789 struct vnode *newvp; 790 u_int32_t *tl; 791 caddr_t cp; 792 int32_t t1, t2; 793 struct nfsmount *nmp; 794 caddr_t bpos, dpos, cp2; 795 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 796 long len; 797 nfsfh_t *fhp; 798 struct nfsnode *np; 799 int lockparent, wantparent, error = 0, attrflag, fhsize; 800 const int v3 = NFS_ISV3(dvp); 801 cnp->cn_flags &= ~PDIRUNLOCK; 802 flags = cnp->cn_flags; 803 804 *vpp = NULLVP; 805 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 806 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 807 return (EROFS); 808 if (dvp->v_type != VDIR) 809 return (ENOTDIR); 810 811 lockparent = flags & LOCKPARENT; 812 wantparent = flags & (LOCKPARENT|WANTPARENT); 813 nmp = VFSTONFS(dvp->v_mount); 814 np = VTONFS(dvp); 815 816 /* 817 * Before tediously performing a linear scan of the directory, 818 * check the name cache to see if the directory/name pair 819 * we are looking for is known already. 820 * If the directory/name pair is found in the name cache, 821 * we have to ensure the directory has not changed from 822 * the time the cache entry has been created. If it has, 823 * the cache entry has to be ignored 824 */ 825 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 826 struct vattr vattr; 827 int err2; 828 829 if (error && error != ENOENT) { 830 *vpp = NULLVP; 831 return (error); 832 } 833 834 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 835 if (err2) { 836 *vpp = NULLVP; 837 return (err2); 838 } 839 840 if (error == ENOENT) { 841 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 842 cnp->cn_proc) && vattr.va_mtime.tv_sec == 843 VTONFS(dvp)->n_nctime) 844 return (ENOENT); 845 cache_purge(dvp); 846 np->n_nctime = 0; 847 goto dorpc; 848 } else if (error > 0) { 849 *vpp = NULLVP; 850 return error; 851 } 852 853 newvp = *vpp; 854 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 855 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 856 { 857 nfsstats.lookupcache_hits++; 858 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 859 cnp->cn_flags |= SAVENAME; 860 return (0); 861 } 862 /* XXX cache_lookup() returns the vnode locked; if nfs 863 * would have real vnode locking, we should call VOP_UNLOCK() 864 * here; as it has no real locking, don't bother to do 865 * anything */ 866 /* VOP_UNLOCK(newvp, 0); */ 867 cache_purge(newvp); 868 vrele(newvp); 869 *vpp = NULLVP; 870 } 871 dorpc: 872 error = 0; 873 newvp = NULLVP; 874 nfsstats.lookupcache_misses++; 875 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 876 len = cnp->cn_namelen; 877 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 878 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 879 nfsm_fhtom(dvp, v3); 880 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 881 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 882 if (error) { 883 nfsm_postop_attr(dvp, attrflag); 884 m_freem(mrep); 885 goto nfsmout; 886 } 887 nfsm_getfh(fhp, fhsize, v3); 888 889 /* 890 * Handle RENAME case... 891 */ 892 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 893 if (NFS_CMPFH(np, fhp, fhsize)) { 894 m_freem(mrep); 895 return (EISDIR); 896 } 897 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 898 if (error) { 899 m_freem(mrep); 900 return (error); 901 } 902 newvp = NFSTOV(np); 903 if (v3) { 904 nfsm_postop_attr(newvp, attrflag); 905 nfsm_postop_attr(dvp, attrflag); 906 } else 907 nfsm_loadattr(newvp, (struct vattr *)0); 908 *vpp = newvp; 909 m_freem(mrep); 910 cnp->cn_flags |= SAVENAME; 911 if (!lockparent || !(flags & ISLASTCN)) 912 cnp->cn_flags |= PDIRUNLOCK; 913 return (0); 914 } 915 916 if (NFS_CMPFH(np, fhp, fhsize)) { 917 VREF(dvp); 918 newvp = dvp; 919 } else { 920 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 921 if (error) { 922 m_freem(mrep); 923 return (error); 924 } 925 newvp = NFSTOV(np); 926 } 927 if (v3) { 928 nfsm_postop_attr(newvp, attrflag); 929 nfsm_postop_attr(dvp, attrflag); 930 } else 931 nfsm_loadattr(newvp, (struct vattr *)0); 932 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 933 cnp->cn_flags |= SAVENAME; 934 if ((cnp->cn_flags & MAKEENTRY) && 935 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 936 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 937 cache_enter(dvp, newvp, cnp); 938 } 939 *vpp = newvp; 940 nfsm_reqdone; 941 if (error) { 942 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 943 cnp->cn_nameiop != CREATE) { 944 if (VTONFS(dvp)->n_nctime == 0) 945 VTONFS(dvp)->n_nctime = 946 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 947 cache_enter(dvp, NULL, cnp); 948 } 949 if (newvp != NULLVP) 950 vrele(newvp); 951 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 952 (flags & ISLASTCN) && error == ENOENT) { 953 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 954 error = EROFS; 955 else 956 error = EJUSTRETURN; 957 } 958 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 959 cnp->cn_flags |= SAVENAME; 960 } else { 961 if (!lockparent || !(flags & ISLASTCN)) 962 cnp->cn_flags |= PDIRUNLOCK; 963 } 964 return (error); 965 } 966 967 /* 968 * nfs read call. 969 * Just call nfs_bioread() to do the work. 970 */ 971 int 972 nfs_read(v) 973 void *v; 974 { 975 struct vop_read_args /* { 976 struct vnode *a_vp; 977 struct uio *a_uio; 978 int a_ioflag; 979 struct ucred *a_cred; 980 } */ *ap = v; 981 struct vnode *vp = ap->a_vp; 982 983 if (vp->v_type != VREG) 984 return (EPERM); 985 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 986 } 987 988 /* 989 * nfs readlink call 990 */ 991 int 992 nfs_readlink(v) 993 void *v; 994 { 995 struct vop_readlink_args /* { 996 struct vnode *a_vp; 997 struct uio *a_uio; 998 struct ucred *a_cred; 999 } */ *ap = v; 1000 struct vnode *vp = ap->a_vp; 1001 1002 if (vp->v_type != VLNK) 1003 return (EPERM); 1004 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1005 } 1006 1007 /* 1008 * Do a readlink rpc. 1009 * Called by nfs_doio() from below the buffer cache. 1010 */ 1011 int 1012 nfs_readlinkrpc(vp, uiop, cred) 1013 struct vnode *vp; 1014 struct uio *uiop; 1015 struct ucred *cred; 1016 { 1017 u_int32_t *tl; 1018 caddr_t cp; 1019 int32_t t1, t2; 1020 caddr_t bpos, dpos, cp2; 1021 int error = 0, len, attrflag; 1022 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1023 const int v3 = NFS_ISV3(vp); 1024 1025 nfsstats.rpccnt[NFSPROC_READLINK]++; 1026 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1027 nfsm_fhtom(vp, v3); 1028 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1029 if (v3) 1030 nfsm_postop_attr(vp, attrflag); 1031 if (!error) { 1032 nfsm_strsiz(len, NFS_MAXPATHLEN); 1033 nfsm_mtouio(uiop, len); 1034 } 1035 nfsm_reqdone; 1036 return (error); 1037 } 1038 1039 /* 1040 * nfs read rpc call 1041 * Ditto above 1042 */ 1043 int 1044 nfs_readrpc(vp, uiop) 1045 struct vnode *vp; 1046 struct uio *uiop; 1047 { 1048 u_int32_t *tl; 1049 caddr_t cp; 1050 int32_t t1, t2; 1051 caddr_t bpos, dpos, cp2; 1052 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1053 struct nfsmount *nmp; 1054 int error = 0, len, retlen, tsiz, eof, attrflag; 1055 const int v3 = NFS_ISV3(vp); 1056 1057 #ifndef nolint 1058 eof = 0; 1059 #endif 1060 nmp = VFSTONFS(vp->v_mount); 1061 tsiz = uiop->uio_resid; 1062 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1063 return (EFBIG); 1064 while (tsiz > 0) { 1065 nfsstats.rpccnt[NFSPROC_READ]++; 1066 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1067 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1068 nfsm_fhtom(vp, v3); 1069 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1070 if (v3) { 1071 txdr_hyper(uiop->uio_offset, tl); 1072 *(tl + 2) = txdr_unsigned(len); 1073 } else { 1074 *tl++ = txdr_unsigned(uiop->uio_offset); 1075 *tl++ = txdr_unsigned(len); 1076 *tl = 0; 1077 } 1078 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1079 VTONFS(vp)->n_rcred); 1080 if (v3) { 1081 nfsm_postop_attr(vp, attrflag); 1082 if (error) { 1083 m_freem(mrep); 1084 goto nfsmout; 1085 } 1086 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1087 eof = fxdr_unsigned(int, *(tl + 1)); 1088 } else 1089 nfsm_loadattr(vp, (struct vattr *)0); 1090 nfsm_strsiz(retlen, nmp->nm_rsize); 1091 nfsm_mtouio(uiop, retlen); 1092 m_freem(mrep); 1093 tsiz -= retlen; 1094 if (v3) { 1095 if (eof || retlen == 0) 1096 tsiz = 0; 1097 } else if (retlen < len) 1098 tsiz = 0; 1099 } 1100 nfsmout: 1101 return (error); 1102 } 1103 1104 /* 1105 * nfs write call 1106 */ 1107 int 1108 nfs_writerpc(vp, uiop, iomode, must_commit) 1109 struct vnode *vp; 1110 struct uio *uiop; 1111 int *iomode, *must_commit; 1112 { 1113 u_int32_t *tl; 1114 caddr_t cp; 1115 int32_t t1, t2, backup; 1116 caddr_t bpos, dpos, cp2; 1117 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1118 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1119 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1120 const int v3 = NFS_ISV3(vp); 1121 int committed = NFSV3WRITE_FILESYNC; 1122 1123 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1124 panic("writerpc readonly vp %p", vp); 1125 } 1126 1127 #ifndef DIAGNOSTIC 1128 if (uiop->uio_iovcnt != 1) 1129 panic("nfs: writerpc iovcnt > 1"); 1130 #endif 1131 *must_commit = 0; 1132 tsiz = uiop->uio_resid; 1133 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1134 return (EFBIG); 1135 while (tsiz > 0) { 1136 nfsstats.rpccnt[NFSPROC_WRITE]++; 1137 len = min(tsiz, nmp->nm_wsize); 1138 nfsm_reqhead(vp, NFSPROC_WRITE, 1139 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1140 nfsm_fhtom(vp, v3); 1141 if (v3) { 1142 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1143 txdr_hyper(uiop->uio_offset, tl); 1144 tl += 2; 1145 *tl++ = txdr_unsigned(len); 1146 *tl++ = txdr_unsigned(*iomode); 1147 *tl = txdr_unsigned(len); 1148 } else { 1149 u_int32_t x; 1150 1151 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1152 /* Set both "begin" and "current" to non-garbage. */ 1153 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1154 *tl++ = x; /* "begin offset" */ 1155 *tl++ = x; /* "current offset" */ 1156 x = txdr_unsigned(len); 1157 *tl++ = x; /* total to this offset */ 1158 *tl = x; /* size of this write */ 1159 1160 } 1161 nfsm_uiotom(uiop, len); 1162 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1163 VTONFS(vp)->n_wcred); 1164 if (v3) { 1165 wccflag = NFSV3_WCCCHK; 1166 nfsm_wcc_data(vp, wccflag); 1167 if (!error) { 1168 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1169 + NFSX_V3WRITEVERF); 1170 rlen = fxdr_unsigned(int, *tl++); 1171 if (rlen == 0) { 1172 error = NFSERR_IO; 1173 m_freem(mrep); 1174 break; 1175 } else if (rlen < len) { 1176 backup = len - rlen; 1177 (caddr_t)uiop->uio_iov->iov_base -= 1178 backup; 1179 uiop->uio_iov->iov_len += backup; 1180 uiop->uio_offset -= backup; 1181 uiop->uio_resid += backup; 1182 len = rlen; 1183 } 1184 commit = fxdr_unsigned(int, *tl++); 1185 1186 /* 1187 * Return the lowest committment level 1188 * obtained by any of the RPCs. 1189 */ 1190 if (committed == NFSV3WRITE_FILESYNC) 1191 committed = commit; 1192 else if (committed == NFSV3WRITE_DATASYNC && 1193 commit == NFSV3WRITE_UNSTABLE) 1194 committed = commit; 1195 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1196 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1197 NFSX_V3WRITEVERF); 1198 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1199 } else if (memcmp((caddr_t)tl, 1200 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1201 *must_commit = 1; 1202 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1203 NFSX_V3WRITEVERF); 1204 } 1205 } 1206 } else 1207 nfsm_loadattr(vp, (struct vattr *)0); 1208 if (wccflag) 1209 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1210 m_freem(mrep); 1211 if (error) 1212 break; 1213 tsiz -= len; 1214 } 1215 nfsmout: 1216 *iomode = committed; 1217 if (error) 1218 uiop->uio_resid = tsiz; 1219 return (error); 1220 } 1221 1222 /* 1223 * nfs mknod rpc 1224 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1225 * mode set to specify the file type and the size field for rdev. 1226 */ 1227 int 1228 nfs_mknodrpc(dvp, vpp, cnp, vap) 1229 struct vnode *dvp; 1230 struct vnode **vpp; 1231 struct componentname *cnp; 1232 struct vattr *vap; 1233 { 1234 struct nfsv2_sattr *sp; 1235 u_int32_t *tl; 1236 caddr_t cp; 1237 int32_t t1, t2; 1238 struct vnode *newvp = (struct vnode *)0; 1239 struct nfsnode *np; 1240 char *cp2; 1241 caddr_t bpos, dpos; 1242 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1243 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1244 u_int32_t rdev; 1245 const int v3 = NFS_ISV3(dvp); 1246 1247 if (vap->va_type == VCHR || vap->va_type == VBLK) 1248 rdev = txdr_unsigned(vap->va_rdev); 1249 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1250 rdev = nfs_xdrneg1; 1251 else { 1252 VOP_ABORTOP(dvp, cnp); 1253 vput(dvp); 1254 return (EOPNOTSUPP); 1255 } 1256 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1257 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1258 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1259 nfsm_fhtom(dvp, v3); 1260 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1261 if (v3) { 1262 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1263 *tl++ = vtonfsv3_type(vap->va_type); 1264 nfsm_v3attrbuild(vap, FALSE); 1265 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1266 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1267 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1268 *tl = txdr_unsigned(minor(vap->va_rdev)); 1269 } 1270 } else { 1271 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1272 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1273 sp->sa_uid = nfs_xdrneg1; 1274 sp->sa_gid = nfs_xdrneg1; 1275 sp->sa_size = rdev; 1276 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1277 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1278 } 1279 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1280 if (!error) { 1281 nfsm_mtofh(dvp, newvp, v3, gotvp); 1282 if (!gotvp) { 1283 if (newvp) { 1284 vrele(newvp); 1285 newvp = (struct vnode *)0; 1286 } 1287 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1288 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1289 if (!error) 1290 newvp = NFSTOV(np); 1291 } 1292 } 1293 if (v3) 1294 nfsm_wcc_data(dvp, wccflag); 1295 nfsm_reqdone; 1296 if (error) { 1297 if (newvp) 1298 vrele(newvp); 1299 } else { 1300 if (cnp->cn_flags & MAKEENTRY) 1301 cache_enter(dvp, newvp, cnp); 1302 *vpp = newvp; 1303 } 1304 PNBUF_PUT(cnp->cn_pnbuf); 1305 VTONFS(dvp)->n_flag |= NMODIFIED; 1306 if (!wccflag) 1307 VTONFS(dvp)->n_attrstamp = 0; 1308 vrele(dvp); 1309 return (error); 1310 } 1311 1312 /* 1313 * nfs mknod vop 1314 * just call nfs_mknodrpc() to do the work. 1315 */ 1316 /* ARGSUSED */ 1317 int 1318 nfs_mknod(v) 1319 void *v; 1320 { 1321 struct vop_mknod_args /* { 1322 struct vnode *a_dvp; 1323 struct vnode **a_vpp; 1324 struct componentname *a_cnp; 1325 struct vattr *a_vap; 1326 } */ *ap = v; 1327 struct vnode *newvp; 1328 int error; 1329 1330 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1331 if (!error) 1332 vrele(newvp); 1333 return (error); 1334 } 1335 1336 static u_long create_verf; 1337 /* 1338 * nfs file create call 1339 */ 1340 int 1341 nfs_create(v) 1342 void *v; 1343 { 1344 struct vop_create_args /* { 1345 struct vnode *a_dvp; 1346 struct vnode **a_vpp; 1347 struct componentname *a_cnp; 1348 struct vattr *a_vap; 1349 } */ *ap = v; 1350 struct vnode *dvp = ap->a_dvp; 1351 struct vattr *vap = ap->a_vap; 1352 struct componentname *cnp = ap->a_cnp; 1353 struct nfsv2_sattr *sp; 1354 u_int32_t *tl; 1355 caddr_t cp; 1356 int32_t t1, t2; 1357 struct nfsnode *np = (struct nfsnode *)0; 1358 struct vnode *newvp = (struct vnode *)0; 1359 caddr_t bpos, dpos, cp2; 1360 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1361 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1362 const int v3 = NFS_ISV3(dvp); 1363 1364 /* 1365 * Oops, not for me.. 1366 */ 1367 if (vap->va_type == VSOCK) 1368 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1369 1370 #ifdef VA_EXCLUSIVE 1371 if (vap->va_vaflags & VA_EXCLUSIVE) 1372 fmode |= O_EXCL; 1373 #endif 1374 again: 1375 error = 0; 1376 nfsstats.rpccnt[NFSPROC_CREATE]++; 1377 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1378 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1379 nfsm_fhtom(dvp, v3); 1380 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1381 if (v3) { 1382 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1383 if (fmode & O_EXCL) { 1384 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1385 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1386 #ifdef INET 1387 if (in_ifaddr.tqh_first) 1388 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1389 else 1390 *tl++ = create_verf; 1391 #else 1392 *tl++ = create_verf; 1393 #endif 1394 *tl = ++create_verf; 1395 } else { 1396 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1397 nfsm_v3attrbuild(vap, FALSE); 1398 } 1399 } else { 1400 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1401 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1402 sp->sa_uid = nfs_xdrneg1; 1403 sp->sa_gid = nfs_xdrneg1; 1404 sp->sa_size = 0; 1405 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1406 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1407 } 1408 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1409 if (!error) { 1410 nfsm_mtofh(dvp, newvp, v3, gotvp); 1411 if (!gotvp) { 1412 if (newvp) { 1413 vrele(newvp); 1414 newvp = (struct vnode *)0; 1415 } 1416 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1417 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1418 if (!error) 1419 newvp = NFSTOV(np); 1420 } 1421 } 1422 if (v3) 1423 nfsm_wcc_data(dvp, wccflag); 1424 nfsm_reqdone; 1425 if (error) { 1426 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1427 fmode &= ~O_EXCL; 1428 goto again; 1429 } 1430 if (newvp) 1431 vrele(newvp); 1432 } else if (v3 && (fmode & O_EXCL)) 1433 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1434 if (!error) { 1435 if (cnp->cn_flags & MAKEENTRY) 1436 cache_enter(dvp, newvp, cnp); 1437 *ap->a_vpp = newvp; 1438 } 1439 PNBUF_PUT(cnp->cn_pnbuf); 1440 VTONFS(dvp)->n_flag |= NMODIFIED; 1441 if (!wccflag) 1442 VTONFS(dvp)->n_attrstamp = 0; 1443 vrele(dvp); 1444 return (error); 1445 } 1446 1447 /* 1448 * nfs file remove call 1449 * To try and make nfs semantics closer to ufs semantics, a file that has 1450 * other processes using the vnode is renamed instead of removed and then 1451 * removed later on the last close. 1452 * - If v_usecount > 1 1453 * If a rename is not already in the works 1454 * call nfs_sillyrename() to set it up 1455 * else 1456 * do the remove rpc 1457 */ 1458 int 1459 nfs_remove(v) 1460 void *v; 1461 { 1462 struct vop_remove_args /* { 1463 struct vnodeop_desc *a_desc; 1464 struct vnode * a_dvp; 1465 struct vnode * a_vp; 1466 struct componentname * a_cnp; 1467 } */ *ap = v; 1468 struct vnode *vp = ap->a_vp; 1469 struct vnode *dvp = ap->a_dvp; 1470 struct componentname *cnp = ap->a_cnp; 1471 struct nfsnode *np = VTONFS(vp); 1472 int error = 0; 1473 struct vattr vattr; 1474 1475 #ifndef DIAGNOSTIC 1476 if ((cnp->cn_flags & HASBUF) == 0) 1477 panic("nfs_remove: no name"); 1478 if (vp->v_usecount < 1) 1479 panic("nfs_remove: bad v_usecount"); 1480 #endif 1481 if (vp->v_type == VDIR) 1482 error = EPERM; 1483 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1484 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1485 vattr.va_nlink > 1)) { 1486 /* 1487 * Purge the name cache so that the chance of a lookup for 1488 * the name succeeding while the remove is in progress is 1489 * minimized. Without node locking it can still happen, such 1490 * that an I/O op returns ESTALE, but since you get this if 1491 * another host removes the file.. 1492 */ 1493 cache_purge(vp); 1494 /* 1495 * throw away biocache buffers, mainly to avoid 1496 * unnecessary delayed writes later. 1497 */ 1498 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1499 /* Do the rpc */ 1500 if (error != EINTR) 1501 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1502 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1503 /* 1504 * Kludge City: If the first reply to the remove rpc is lost.. 1505 * the reply to the retransmitted request will be ENOENT 1506 * since the file was in fact removed 1507 * Therefore, we cheat and return success. 1508 */ 1509 if (error == ENOENT) 1510 error = 0; 1511 } else if (!np->n_sillyrename) 1512 error = nfs_sillyrename(dvp, vp, cnp); 1513 PNBUF_PUT(cnp->cn_pnbuf); 1514 np->n_attrstamp = 0; 1515 vrele(dvp); 1516 vrele(vp); 1517 return (error); 1518 } 1519 1520 /* 1521 * nfs file remove rpc called from nfs_inactive 1522 */ 1523 int 1524 nfs_removeit(sp) 1525 struct sillyrename *sp; 1526 { 1527 1528 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1529 (struct proc *)0)); 1530 } 1531 1532 /* 1533 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1534 */ 1535 int 1536 nfs_removerpc(dvp, name, namelen, cred, proc) 1537 struct vnode *dvp; 1538 const char *name; 1539 int namelen; 1540 struct ucred *cred; 1541 struct proc *proc; 1542 { 1543 u_int32_t *tl; 1544 caddr_t cp; 1545 int32_t t1, t2; 1546 caddr_t bpos, dpos, cp2; 1547 int error = 0, wccflag = NFSV3_WCCRATTR; 1548 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1549 const int v3 = NFS_ISV3(dvp); 1550 1551 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1552 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1553 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1554 nfsm_fhtom(dvp, v3); 1555 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1556 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1557 if (v3) 1558 nfsm_wcc_data(dvp, wccflag); 1559 nfsm_reqdone; 1560 VTONFS(dvp)->n_flag |= NMODIFIED; 1561 if (!wccflag) 1562 VTONFS(dvp)->n_attrstamp = 0; 1563 return (error); 1564 } 1565 1566 /* 1567 * nfs file rename call 1568 */ 1569 int 1570 nfs_rename(v) 1571 void *v; 1572 { 1573 struct vop_rename_args /* { 1574 struct vnode *a_fdvp; 1575 struct vnode *a_fvp; 1576 struct componentname *a_fcnp; 1577 struct vnode *a_tdvp; 1578 struct vnode *a_tvp; 1579 struct componentname *a_tcnp; 1580 } */ *ap = v; 1581 struct vnode *fvp = ap->a_fvp; 1582 struct vnode *tvp = ap->a_tvp; 1583 struct vnode *fdvp = ap->a_fdvp; 1584 struct vnode *tdvp = ap->a_tdvp; 1585 struct componentname *tcnp = ap->a_tcnp; 1586 struct componentname *fcnp = ap->a_fcnp; 1587 int error; 1588 1589 #ifndef DIAGNOSTIC 1590 if ((tcnp->cn_flags & HASBUF) == 0 || 1591 (fcnp->cn_flags & HASBUF) == 0) 1592 panic("nfs_rename: no name"); 1593 #endif 1594 /* Check for cross-device rename */ 1595 if ((fvp->v_mount != tdvp->v_mount) || 1596 (tvp && (fvp->v_mount != tvp->v_mount))) { 1597 error = EXDEV; 1598 goto out; 1599 } 1600 1601 /* 1602 * If the tvp exists and is in use, sillyrename it before doing the 1603 * rename of the new file over it. 1604 */ 1605 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1606 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1607 vrele(tvp); 1608 tvp = NULL; 1609 } 1610 1611 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1612 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1613 tcnp->cn_proc); 1614 1615 if (fvp->v_type == VDIR) { 1616 if (tvp != NULL && tvp->v_type == VDIR) 1617 cache_purge(tdvp); 1618 cache_purge(fdvp); 1619 } 1620 out: 1621 if (tdvp == tvp) 1622 vrele(tdvp); 1623 else 1624 vput(tdvp); 1625 if (tvp) 1626 vput(tvp); 1627 vrele(fdvp); 1628 vrele(fvp); 1629 /* 1630 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1631 */ 1632 if (error == ENOENT) 1633 error = 0; 1634 return (error); 1635 } 1636 1637 /* 1638 * nfs file rename rpc called from nfs_remove() above 1639 */ 1640 int 1641 nfs_renameit(sdvp, scnp, sp) 1642 struct vnode *sdvp; 1643 struct componentname *scnp; 1644 struct sillyrename *sp; 1645 { 1646 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1647 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1648 } 1649 1650 /* 1651 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1652 */ 1653 int 1654 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1655 struct vnode *fdvp; 1656 const char *fnameptr; 1657 int fnamelen; 1658 struct vnode *tdvp; 1659 const char *tnameptr; 1660 int tnamelen; 1661 struct ucred *cred; 1662 struct proc *proc; 1663 { 1664 u_int32_t *tl; 1665 caddr_t cp; 1666 int32_t t1, t2; 1667 caddr_t bpos, dpos, cp2; 1668 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1669 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1670 const int v3 = NFS_ISV3(fdvp); 1671 1672 nfsstats.rpccnt[NFSPROC_RENAME]++; 1673 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1674 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1675 nfsm_rndup(tnamelen)); 1676 nfsm_fhtom(fdvp, v3); 1677 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1678 nfsm_fhtom(tdvp, v3); 1679 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1680 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1681 if (v3) { 1682 nfsm_wcc_data(fdvp, fwccflag); 1683 nfsm_wcc_data(tdvp, twccflag); 1684 } 1685 nfsm_reqdone; 1686 VTONFS(fdvp)->n_flag |= NMODIFIED; 1687 VTONFS(tdvp)->n_flag |= NMODIFIED; 1688 if (!fwccflag) 1689 VTONFS(fdvp)->n_attrstamp = 0; 1690 if (!twccflag) 1691 VTONFS(tdvp)->n_attrstamp = 0; 1692 return (error); 1693 } 1694 1695 /* 1696 * nfs hard link create call 1697 */ 1698 int 1699 nfs_link(v) 1700 void *v; 1701 { 1702 struct vop_link_args /* { 1703 struct vnode *a_dvp; 1704 struct vnode *a_vp; 1705 struct componentname *a_cnp; 1706 } */ *ap = v; 1707 struct vnode *vp = ap->a_vp; 1708 struct vnode *dvp = ap->a_dvp; 1709 struct componentname *cnp = ap->a_cnp; 1710 u_int32_t *tl; 1711 caddr_t cp; 1712 int32_t t1, t2; 1713 caddr_t bpos, dpos, cp2; 1714 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1715 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1716 /* XXX Should be const and initialised? */ 1717 int v3; 1718 1719 if (dvp->v_mount != vp->v_mount) { 1720 VOP_ABORTOP(vp, cnp); 1721 vput(dvp); 1722 return (EXDEV); 1723 } 1724 1725 /* 1726 * Push all writes to the server, so that the attribute cache 1727 * doesn't get "out of sync" with the server. 1728 * XXX There should be a better way! 1729 */ 1730 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1731 1732 v3 = NFS_ISV3(vp); 1733 nfsstats.rpccnt[NFSPROC_LINK]++; 1734 nfsm_reqhead(vp, NFSPROC_LINK, 1735 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1736 nfsm_fhtom(vp, v3); 1737 nfsm_fhtom(dvp, v3); 1738 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1739 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1740 if (v3) { 1741 nfsm_postop_attr(vp, attrflag); 1742 nfsm_wcc_data(dvp, wccflag); 1743 } 1744 nfsm_reqdone; 1745 PNBUF_PUT(cnp->cn_pnbuf); 1746 VTONFS(dvp)->n_flag |= NMODIFIED; 1747 if (!attrflag) 1748 VTONFS(vp)->n_attrstamp = 0; 1749 if (!wccflag) 1750 VTONFS(dvp)->n_attrstamp = 0; 1751 vput(dvp); 1752 /* 1753 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1754 */ 1755 if (error == EEXIST) 1756 error = 0; 1757 return (error); 1758 } 1759 1760 /* 1761 * nfs symbolic link create call 1762 */ 1763 int 1764 nfs_symlink(v) 1765 void *v; 1766 { 1767 struct vop_symlink_args /* { 1768 struct vnode *a_dvp; 1769 struct vnode **a_vpp; 1770 struct componentname *a_cnp; 1771 struct vattr *a_vap; 1772 char *a_target; 1773 } */ *ap = v; 1774 struct vnode *dvp = ap->a_dvp; 1775 struct vattr *vap = ap->a_vap; 1776 struct componentname *cnp = ap->a_cnp; 1777 struct nfsv2_sattr *sp; 1778 u_int32_t *tl; 1779 caddr_t cp; 1780 int32_t t1, t2; 1781 caddr_t bpos, dpos, cp2; 1782 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1783 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1784 struct vnode *newvp = (struct vnode *)0; 1785 const int v3 = NFS_ISV3(dvp); 1786 1787 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1788 slen = strlen(ap->a_target); 1789 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1790 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1791 nfsm_fhtom(dvp, v3); 1792 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1793 if (v3) 1794 nfsm_v3attrbuild(vap, FALSE); 1795 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1796 if (!v3) { 1797 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1798 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1799 sp->sa_uid = nfs_xdrneg1; 1800 sp->sa_gid = nfs_xdrneg1; 1801 sp->sa_size = nfs_xdrneg1; 1802 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1803 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1804 } 1805 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1806 if (v3) { 1807 if (!error) 1808 nfsm_mtofh(dvp, newvp, v3, gotvp); 1809 nfsm_wcc_data(dvp, wccflag); 1810 } 1811 nfsm_reqdone; 1812 if (newvp) 1813 vrele(newvp); 1814 PNBUF_PUT(cnp->cn_pnbuf); 1815 VTONFS(dvp)->n_flag |= NMODIFIED; 1816 if (!wccflag) 1817 VTONFS(dvp)->n_attrstamp = 0; 1818 vrele(dvp); 1819 /* 1820 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1821 */ 1822 if (error == EEXIST) 1823 error = 0; 1824 return (error); 1825 } 1826 1827 /* 1828 * nfs make dir call 1829 */ 1830 int 1831 nfs_mkdir(v) 1832 void *v; 1833 { 1834 struct vop_mkdir_args /* { 1835 struct vnode *a_dvp; 1836 struct vnode **a_vpp; 1837 struct componentname *a_cnp; 1838 struct vattr *a_vap; 1839 } */ *ap = v; 1840 struct vnode *dvp = ap->a_dvp; 1841 struct vattr *vap = ap->a_vap; 1842 struct componentname *cnp = ap->a_cnp; 1843 struct nfsv2_sattr *sp; 1844 u_int32_t *tl; 1845 caddr_t cp; 1846 int32_t t1, t2; 1847 int len; 1848 struct nfsnode *np = (struct nfsnode *)0; 1849 struct vnode *newvp = (struct vnode *)0; 1850 caddr_t bpos, dpos, cp2; 1851 int error = 0, wccflag = NFSV3_WCCRATTR; 1852 int gotvp = 0; 1853 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1854 const int v3 = NFS_ISV3(dvp); 1855 1856 len = cnp->cn_namelen; 1857 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1858 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1859 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1860 nfsm_fhtom(dvp, v3); 1861 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1862 if (v3) { 1863 nfsm_v3attrbuild(vap, FALSE); 1864 } else { 1865 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1866 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1867 sp->sa_uid = nfs_xdrneg1; 1868 sp->sa_gid = nfs_xdrneg1; 1869 sp->sa_size = nfs_xdrneg1; 1870 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1871 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1872 } 1873 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1874 if (!error) 1875 nfsm_mtofh(dvp, newvp, v3, gotvp); 1876 if (v3) 1877 nfsm_wcc_data(dvp, wccflag); 1878 nfsm_reqdone; 1879 VTONFS(dvp)->n_flag |= NMODIFIED; 1880 if (!wccflag) 1881 VTONFS(dvp)->n_attrstamp = 0; 1882 /* 1883 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1884 * if we can succeed in looking up the directory. 1885 */ 1886 if (error == EEXIST || (!error && !gotvp)) { 1887 if (newvp) { 1888 vrele(newvp); 1889 newvp = (struct vnode *)0; 1890 } 1891 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1892 cnp->cn_proc, &np); 1893 if (!error) { 1894 newvp = NFSTOV(np); 1895 if (newvp->v_type != VDIR) 1896 error = EEXIST; 1897 } 1898 } 1899 if (error) { 1900 if (newvp) 1901 vrele(newvp); 1902 } else { 1903 if (cnp->cn_flags & MAKEENTRY) 1904 cache_enter(dvp, newvp, cnp); 1905 *ap->a_vpp = newvp; 1906 } 1907 PNBUF_PUT(cnp->cn_pnbuf); 1908 vrele(dvp); 1909 return (error); 1910 } 1911 1912 /* 1913 * nfs remove directory call 1914 */ 1915 int 1916 nfs_rmdir(v) 1917 void *v; 1918 { 1919 struct vop_rmdir_args /* { 1920 struct vnode *a_dvp; 1921 struct vnode *a_vp; 1922 struct componentname *a_cnp; 1923 } */ *ap = v; 1924 struct vnode *vp = ap->a_vp; 1925 struct vnode *dvp = ap->a_dvp; 1926 struct componentname *cnp = ap->a_cnp; 1927 u_int32_t *tl; 1928 caddr_t cp; 1929 int32_t t1, t2; 1930 caddr_t bpos, dpos, cp2; 1931 int error = 0, wccflag = NFSV3_WCCRATTR; 1932 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1933 const int v3 = NFS_ISV3(dvp); 1934 1935 if (dvp == vp) { 1936 vrele(dvp); 1937 vrele(dvp); 1938 PNBUF_PUT(cnp->cn_pnbuf); 1939 return (EINVAL); 1940 } 1941 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1942 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1943 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1944 nfsm_fhtom(dvp, v3); 1945 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1946 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1947 if (v3) 1948 nfsm_wcc_data(dvp, wccflag); 1949 nfsm_reqdone; 1950 PNBUF_PUT(cnp->cn_pnbuf); 1951 VTONFS(dvp)->n_flag |= NMODIFIED; 1952 if (!wccflag) 1953 VTONFS(dvp)->n_attrstamp = 0; 1954 cache_purge(dvp); 1955 cache_purge(vp); 1956 vrele(vp); 1957 vrele(dvp); 1958 /* 1959 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1960 */ 1961 if (error == ENOENT) 1962 error = 0; 1963 return (error); 1964 } 1965 1966 /* 1967 * nfs readdir call 1968 */ 1969 int 1970 nfs_readdir(v) 1971 void *v; 1972 { 1973 struct vop_readdir_args /* { 1974 struct vnode *a_vp; 1975 struct uio *a_uio; 1976 struct ucred *a_cred; 1977 int *a_eofflag; 1978 off_t **a_cookies; 1979 int *a_ncookies; 1980 } */ *ap = v; 1981 struct vnode *vp = ap->a_vp; 1982 struct uio *uio = ap->a_uio; 1983 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1984 char *base = uio->uio_iov->iov_base; 1985 int tresid, error; 1986 size_t count, lost; 1987 struct dirent *dp; 1988 off_t *cookies = NULL; 1989 int ncookies = 0, nc; 1990 1991 if (vp->v_type != VDIR) 1992 return (EPERM); 1993 1994 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 1995 count = uio->uio_resid - lost; 1996 if (count <= 0) 1997 return (EINVAL); 1998 1999 /* 2000 * Call nfs_bioread() to do the real work. 2001 */ 2002 tresid = uio->uio_resid = count; 2003 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2004 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2005 2006 if (!error && ap->a_cookies) { 2007 ncookies = count / 16; 2008 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2009 *ap->a_cookies = cookies; 2010 } 2011 2012 if (!error && uio->uio_resid == tresid) { 2013 uio->uio_resid += lost; 2014 nfsstats.direofcache_misses++; 2015 if (ap->a_cookies) 2016 *ap->a_ncookies = 0; 2017 *ap->a_eofflag = 1; 2018 return (0); 2019 } 2020 2021 if (!error && ap->a_cookies) { 2022 /* 2023 * Only the NFS server and emulations use cookies, and they 2024 * load the directory block into system space, so we can 2025 * just look at it directly. 2026 */ 2027 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2028 panic("nfs_readdir: lost in space"); 2029 for (nc = 0; ncookies-- && 2030 base < (char *)uio->uio_iov->iov_base; nc++){ 2031 dp = (struct dirent *) base; 2032 if (dp->d_reclen == 0) 2033 break; 2034 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2035 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2036 else 2037 *(cookies++) = NFS_GETCOOKIE(dp); 2038 base += dp->d_reclen; 2039 } 2040 uio->uio_resid += 2041 ((caddr_t)uio->uio_iov->iov_base - base); 2042 uio->uio_iov->iov_len += 2043 ((caddr_t)uio->uio_iov->iov_base - base); 2044 uio->uio_iov->iov_base = base; 2045 *ap->a_ncookies = nc; 2046 } 2047 2048 uio->uio_resid += lost; 2049 *ap->a_eofflag = 0; 2050 return (error); 2051 } 2052 2053 /* 2054 * Readdir rpc call. 2055 * Called from below the buffer cache by nfs_doio(). 2056 */ 2057 int 2058 nfs_readdirrpc(vp, uiop, cred) 2059 struct vnode *vp; 2060 struct uio *uiop; 2061 struct ucred *cred; 2062 { 2063 int len, left; 2064 struct dirent *dp = NULL; 2065 u_int32_t *tl; 2066 caddr_t cp; 2067 int32_t t1, t2; 2068 caddr_t bpos, dpos, cp2; 2069 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2070 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2071 struct nfsnode *dnp = VTONFS(vp); 2072 u_quad_t fileno; 2073 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2074 int attrflag, nrpcs = 0, reclen; 2075 const int v3 = NFS_ISV3(vp); 2076 nfsquad_t cookie; 2077 2078 #ifdef DIAGNOSTIC 2079 /* 2080 * Should be called from buffer cache, so only amount of 2081 * NFS_DIRBLKSIZ will be requested. 2082 */ 2083 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2084 panic("nfs readdirrpc bad uio"); 2085 #endif 2086 2087 /* 2088 * Loop around doing readdir rpc's of size nm_readdirsize 2089 * truncated to a multiple of NFS_DIRFRAGSIZ. 2090 * The stopping criteria is EOF or buffer full. 2091 */ 2092 while (more_dirs && bigenough) { 2093 /* 2094 * Heuristic: don't bother to do another RPC to further 2095 * fill up this block if there is not much room left. (< 50% 2096 * of the readdir RPC size). This wastes some buffer space 2097 * but can save up to 50% in RPC calls. 2098 */ 2099 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2100 bigenough = 0; 2101 break; 2102 } 2103 nfsstats.rpccnt[NFSPROC_READDIR]++; 2104 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2105 NFSX_READDIR(v3)); 2106 nfsm_fhtom(vp, v3); 2107 if (v3) { 2108 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2109 cookie.qval = uiop->uio_offset; 2110 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2111 txdr_swapcookie3(uiop->uio_offset, tl); 2112 } else { 2113 txdr_cookie3(uiop->uio_offset, tl); 2114 } 2115 tl += 2; 2116 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2117 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2118 } else { 2119 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2120 *tl++ = txdr_unsigned(uiop->uio_offset); 2121 } 2122 *tl = txdr_unsigned(nmp->nm_readdirsize); 2123 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2124 nrpcs++; 2125 if (v3) { 2126 nfsm_postop_attr(vp, attrflag); 2127 if (!error) { 2128 nfsm_dissect(tl, u_int32_t *, 2129 2 * NFSX_UNSIGNED); 2130 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2131 dnp->n_cookieverf.nfsuquad[1] = *tl; 2132 } else { 2133 m_freem(mrep); 2134 goto nfsmout; 2135 } 2136 } 2137 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2138 more_dirs = fxdr_unsigned(int, *tl); 2139 2140 /* loop thru the dir entries, doctoring them to 4bsd form */ 2141 while (more_dirs && bigenough) { 2142 if (v3) { 2143 nfsm_dissect(tl, u_int32_t *, 2144 3 * NFSX_UNSIGNED); 2145 fileno = fxdr_hyper(tl); 2146 len = fxdr_unsigned(int, *(tl + 2)); 2147 } else { 2148 nfsm_dissect(tl, u_int32_t *, 2149 2 * NFSX_UNSIGNED); 2150 fileno = fxdr_unsigned(u_quad_t, *tl++); 2151 len = fxdr_unsigned(int, *tl); 2152 } 2153 if (len <= 0 || len > NFS_MAXNAMLEN) { 2154 error = EBADRPC; 2155 m_freem(mrep); 2156 goto nfsmout; 2157 } 2158 tlen = nfsm_rndup(len); 2159 if (tlen == len) 2160 tlen += 4; /* To ensure null termination */ 2161 tlen += sizeof (off_t) + sizeof (int); 2162 reclen = ALIGN(tlen + DIRHDSIZ); 2163 tlen = reclen - DIRHDSIZ; 2164 left = NFS_DIRFRAGSIZ - blksiz; 2165 if (reclen > left) { 2166 dp->d_reclen += left; 2167 (caddr_t)uiop->uio_iov->iov_base += left; 2168 uiop->uio_iov->iov_len -= left; 2169 uiop->uio_resid -= left; 2170 blksiz = 0; 2171 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2172 } 2173 if (reclen > uiop->uio_resid) 2174 bigenough = 0; 2175 if (bigenough) { 2176 dp = (struct dirent *)uiop->uio_iov->iov_base; 2177 dp->d_fileno = (int)fileno; 2178 dp->d_namlen = len; 2179 dp->d_reclen = reclen; 2180 dp->d_type = DT_UNKNOWN; 2181 blksiz += dp->d_reclen; 2182 if (blksiz == NFS_DIRFRAGSIZ) 2183 blksiz = 0; 2184 uiop->uio_resid -= DIRHDSIZ; 2185 (caddr_t)uiop->uio_iov->iov_base += DIRHDSIZ; 2186 uiop->uio_iov->iov_len -= DIRHDSIZ; 2187 nfsm_mtouio(uiop, len); 2188 cp = uiop->uio_iov->iov_base; 2189 tlen -= len; 2190 *cp = '\0'; /* null terminate */ 2191 (caddr_t)uiop->uio_iov->iov_base += tlen; 2192 uiop->uio_iov->iov_len -= tlen; 2193 uiop->uio_resid -= tlen; 2194 } else 2195 nfsm_adv(nfsm_rndup(len)); 2196 if (v3) { 2197 nfsm_dissect(tl, u_int32_t *, 2198 3 * NFSX_UNSIGNED); 2199 } else { 2200 nfsm_dissect(tl, u_int32_t *, 2201 2 * NFSX_UNSIGNED); 2202 } 2203 if (bigenough) { 2204 if (v3) { 2205 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2206 uiop->uio_offset = 2207 fxdr_swapcookie3(tl); 2208 else 2209 uiop->uio_offset = 2210 fxdr_cookie3(tl); 2211 } 2212 else { 2213 uiop->uio_offset = 2214 fxdr_unsigned(off_t, *tl); 2215 } 2216 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2217 } 2218 if (v3) 2219 tl += 2; 2220 else 2221 tl++; 2222 more_dirs = fxdr_unsigned(int, *tl); 2223 } 2224 /* 2225 * If at end of rpc data, get the eof boolean 2226 */ 2227 if (!more_dirs) { 2228 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2229 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2230 } 2231 m_freem(mrep); 2232 } 2233 /* 2234 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2235 * by increasing d_reclen for the last record. 2236 */ 2237 if (blksiz > 0) { 2238 left = NFS_DIRFRAGSIZ - blksiz; 2239 dp->d_reclen += left; 2240 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2241 (caddr_t)uiop->uio_iov->iov_base += left; 2242 uiop->uio_iov->iov_len -= left; 2243 uiop->uio_resid -= left; 2244 } 2245 2246 /* 2247 * We are now either at the end of the directory or have filled the 2248 * block. 2249 */ 2250 if (bigenough) 2251 dnp->n_direofoffset = uiop->uio_offset; 2252 nfsmout: 2253 return (error); 2254 } 2255 2256 /* 2257 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2258 */ 2259 int 2260 nfs_readdirplusrpc(vp, uiop, cred) 2261 struct vnode *vp; 2262 struct uio *uiop; 2263 struct ucred *cred; 2264 { 2265 int len, left; 2266 struct dirent *dp = NULL; 2267 u_int32_t *tl; 2268 caddr_t cp; 2269 int32_t t1, t2; 2270 struct vnode *newvp; 2271 caddr_t bpos, dpos, cp2; 2272 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2273 struct nameidata nami, *ndp = &nami; 2274 struct componentname *cnp = &ndp->ni_cnd; 2275 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2276 struct nfsnode *dnp = VTONFS(vp), *np; 2277 const unsigned char *hcp; 2278 nfsfh_t *fhp; 2279 u_quad_t fileno; 2280 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2281 int attrflag, fhsize, nrpcs = 0, reclen; 2282 struct nfs_fattr fattr, *fp; 2283 2284 #ifdef DIAGNOSTIC 2285 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2286 panic("nfs readdirplusrpc bad uio"); 2287 #endif 2288 ndp->ni_dvp = vp; 2289 newvp = NULLVP; 2290 2291 /* 2292 * Loop around doing readdir rpc's of size nm_readdirsize 2293 * truncated to a multiple of NFS_DIRFRAGSIZ. 2294 * The stopping criteria is EOF or buffer full. 2295 */ 2296 while (more_dirs && bigenough) { 2297 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2298 bigenough = 0; 2299 break; 2300 } 2301 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2302 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2303 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2304 nfsm_fhtom(vp, 1); 2305 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2306 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2307 txdr_swapcookie3(uiop->uio_offset, tl); 2308 } else { 2309 txdr_cookie3(uiop->uio_offset, tl); 2310 } 2311 tl += 2; 2312 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2313 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2314 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2315 *tl = txdr_unsigned(nmp->nm_rsize); 2316 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2317 nfsm_postop_attr(vp, attrflag); 2318 if (error) { 2319 m_freem(mrep); 2320 goto nfsmout; 2321 } 2322 nrpcs++; 2323 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2324 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2325 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2326 more_dirs = fxdr_unsigned(int, *tl); 2327 2328 /* loop thru the dir entries, doctoring them to 4bsd form */ 2329 while (more_dirs && bigenough) { 2330 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2331 fileno = fxdr_hyper(tl); 2332 len = fxdr_unsigned(int, *(tl + 2)); 2333 if (len <= 0 || len > NFS_MAXNAMLEN) { 2334 error = EBADRPC; 2335 m_freem(mrep); 2336 goto nfsmout; 2337 } 2338 tlen = nfsm_rndup(len); 2339 if (tlen == len) 2340 tlen += 4; /* To ensure null termination*/ 2341 tlen += sizeof (off_t) + sizeof (int); 2342 reclen = ALIGN(tlen + DIRHDSIZ); 2343 tlen = reclen - DIRHDSIZ; 2344 left = NFS_DIRFRAGSIZ - blksiz; 2345 if (reclen > left) { 2346 /* 2347 * DIRFRAGSIZ is aligned, no need to align 2348 * again here. 2349 */ 2350 dp->d_reclen += left; 2351 (caddr_t)uiop->uio_iov->iov_base += left; 2352 uiop->uio_iov->iov_len -= left; 2353 uiop->uio_resid -= left; 2354 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2355 blksiz = 0; 2356 } 2357 if (reclen > uiop->uio_resid) 2358 bigenough = 0; 2359 if (bigenough) { 2360 dp = (struct dirent *)uiop->uio_iov->iov_base; 2361 dp->d_fileno = (int)fileno; 2362 dp->d_namlen = len; 2363 dp->d_reclen = reclen; 2364 dp->d_type = DT_UNKNOWN; 2365 blksiz += dp->d_reclen; 2366 if (blksiz == NFS_DIRFRAGSIZ) 2367 blksiz = 0; 2368 uiop->uio_resid -= DIRHDSIZ; 2369 (caddr_t)uiop->uio_iov->iov_base += DIRHDSIZ; 2370 uiop->uio_iov->iov_len -= DIRHDSIZ; 2371 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2372 cnp->cn_namelen = len; 2373 nfsm_mtouio(uiop, len); 2374 cp = uiop->uio_iov->iov_base; 2375 tlen -= len; 2376 *cp = '\0'; 2377 (caddr_t)uiop->uio_iov->iov_base += tlen; 2378 uiop->uio_iov->iov_len -= tlen; 2379 uiop->uio_resid -= tlen; 2380 } else 2381 nfsm_adv(nfsm_rndup(len)); 2382 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2383 if (bigenough) { 2384 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2385 uiop->uio_offset = 2386 fxdr_swapcookie3(tl); 2387 else 2388 uiop->uio_offset = 2389 fxdr_cookie3(tl); 2390 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2391 } 2392 tl += 2; 2393 2394 /* 2395 * Since the attributes are before the file handle 2396 * (sigh), we must skip over the attributes and then 2397 * come back and get them. 2398 */ 2399 attrflag = fxdr_unsigned(int, *tl); 2400 if (attrflag) { 2401 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2402 memcpy(&fattr, fp, NFSX_V3FATTR); 2403 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2404 doit = fxdr_unsigned(int, *tl); 2405 if (doit) { 2406 nfsm_getfh(fhp, fhsize, 1); 2407 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2408 VREF(vp); 2409 newvp = vp; 2410 np = dnp; 2411 } else { 2412 error = nfs_nget(vp->v_mount, fhp, 2413 fhsize, &np); 2414 if (!error) 2415 newvp = NFSTOV(np); 2416 } 2417 if (!error) { 2418 nfs_loadattrcache(&newvp, &fattr, 0); 2419 dp->d_type = 2420 IFTODT(VTTOIF(np->n_vattr->va_type)); 2421 ndp->ni_vp = newvp; 2422 cnp->cn_hash = 0; 2423 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2424 i++, hcp++) 2425 cnp->cn_hash += *hcp * i; 2426 if (cnp->cn_namelen <= NCHNAMLEN) 2427 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2428 cnp); 2429 } 2430 } 2431 } else { 2432 /* Just skip over the file handle */ 2433 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2434 i = fxdr_unsigned(int, *tl); 2435 nfsm_adv(nfsm_rndup(i)); 2436 } 2437 if (newvp != NULLVP) { 2438 vrele(newvp); 2439 newvp = NULLVP; 2440 } 2441 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2442 more_dirs = fxdr_unsigned(int, *tl); 2443 } 2444 /* 2445 * If at end of rpc data, get the eof boolean 2446 */ 2447 if (!more_dirs) { 2448 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2449 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2450 } 2451 m_freem(mrep); 2452 } 2453 /* 2454 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2455 * by increasing d_reclen for the last record. 2456 */ 2457 if (blksiz > 0) { 2458 left = NFS_DIRFRAGSIZ - blksiz; 2459 dp->d_reclen += left; 2460 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2461 (caddr_t)uiop->uio_iov->iov_base += left; 2462 uiop->uio_iov->iov_len -= left; 2463 uiop->uio_resid -= left; 2464 } 2465 2466 /* 2467 * We are now either at the end of the directory or have filled the 2468 * block. 2469 */ 2470 if (bigenough) 2471 dnp->n_direofoffset = uiop->uio_offset; 2472 nfsmout: 2473 if (newvp != NULLVP) 2474 vrele(newvp); 2475 return (error); 2476 } 2477 static char hextoasc[] = "0123456789abcdef"; 2478 2479 /* 2480 * Silly rename. To make the NFS filesystem that is stateless look a little 2481 * more like the "ufs" a remove of an active vnode is translated to a rename 2482 * to a funny looking filename that is removed by nfs_inactive on the 2483 * nfsnode. There is the potential for another process on a different client 2484 * to create the same funny name between the nfs_lookitup() fails and the 2485 * nfs_rename() completes, but... 2486 */ 2487 int 2488 nfs_sillyrename(dvp, vp, cnp) 2489 struct vnode *dvp, *vp; 2490 struct componentname *cnp; 2491 { 2492 struct sillyrename *sp; 2493 struct nfsnode *np; 2494 int error; 2495 short pid; 2496 2497 cache_purge(dvp); 2498 np = VTONFS(vp); 2499 #ifndef DIAGNOSTIC 2500 if (vp->v_type == VDIR) 2501 panic("nfs: sillyrename dir"); 2502 #endif 2503 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2504 M_NFSREQ, M_WAITOK); 2505 sp->s_cred = crdup(cnp->cn_cred); 2506 sp->s_dvp = dvp; 2507 VREF(dvp); 2508 2509 /* Fudge together a funny name */ 2510 pid = cnp->cn_proc->p_pid; 2511 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2512 sp->s_namlen = 12; 2513 sp->s_name[8] = hextoasc[pid & 0xf]; 2514 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2515 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2516 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2517 2518 /* Try lookitups until we get one that isn't there */ 2519 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2520 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2521 sp->s_name[4]++; 2522 if (sp->s_name[4] > 'z') { 2523 error = EINVAL; 2524 goto bad; 2525 } 2526 } 2527 error = nfs_renameit(dvp, cnp, sp); 2528 if (error) 2529 goto bad; 2530 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2531 cnp->cn_proc, &np); 2532 np->n_sillyrename = sp; 2533 return (0); 2534 bad: 2535 vrele(sp->s_dvp); 2536 crfree(sp->s_cred); 2537 free((caddr_t)sp, M_NFSREQ); 2538 return (error); 2539 } 2540 2541 /* 2542 * Look up a file name and optionally either update the file handle or 2543 * allocate an nfsnode, depending on the value of npp. 2544 * npp == NULL --> just do the lookup 2545 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2546 * handled too 2547 * *npp != NULL --> update the file handle in the vnode 2548 */ 2549 int 2550 nfs_lookitup(dvp, name, len, cred, procp, npp) 2551 struct vnode *dvp; 2552 const char *name; 2553 int len; 2554 struct ucred *cred; 2555 struct proc *procp; 2556 struct nfsnode **npp; 2557 { 2558 u_int32_t *tl; 2559 caddr_t cp; 2560 int32_t t1, t2; 2561 struct vnode *newvp = (struct vnode *)0; 2562 struct nfsnode *np, *dnp = VTONFS(dvp); 2563 caddr_t bpos, dpos, cp2; 2564 int error = 0, fhlen, attrflag; 2565 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2566 nfsfh_t *nfhp; 2567 const int v3 = NFS_ISV3(dvp); 2568 2569 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2570 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2571 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2572 nfsm_fhtom(dvp, v3); 2573 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2574 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2575 if (npp && !error) { 2576 nfsm_getfh(nfhp, fhlen, v3); 2577 if (*npp) { 2578 np = *npp; 2579 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2580 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2581 np->n_fhp = &np->n_fh; 2582 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2583 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2584 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2585 np->n_fhsize = fhlen; 2586 newvp = NFSTOV(np); 2587 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2588 VREF(dvp); 2589 newvp = dvp; 2590 } else { 2591 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2592 if (error) { 2593 m_freem(mrep); 2594 return (error); 2595 } 2596 newvp = NFSTOV(np); 2597 } 2598 if (v3) { 2599 nfsm_postop_attr(newvp, attrflag); 2600 if (!attrflag && *npp == NULL) { 2601 m_freem(mrep); 2602 vrele(newvp); 2603 return (ENOENT); 2604 } 2605 } else 2606 nfsm_loadattr(newvp, (struct vattr *)0); 2607 } 2608 nfsm_reqdone; 2609 if (npp && *npp == NULL) { 2610 if (error) { 2611 if (newvp) 2612 vrele(newvp); 2613 } else 2614 *npp = np; 2615 } 2616 return (error); 2617 } 2618 2619 /* 2620 * Nfs Version 3 commit rpc 2621 */ 2622 int 2623 nfs_commit(vp, offset, cnt, procp) 2624 struct vnode *vp; 2625 off_t offset; 2626 uint32_t cnt; 2627 struct proc *procp; 2628 { 2629 caddr_t cp; 2630 u_int32_t *tl; 2631 int32_t t1, t2; 2632 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2633 caddr_t bpos, dpos, cp2; 2634 int error = 0, wccflag = NFSV3_WCCRATTR; 2635 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2636 2637 #ifdef fvdl_debug 2638 printf("commit %lu - %lu\n", (unsigned long)offset, 2639 (unsigned long)(offset + cnt)); 2640 #endif 2641 2642 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2643 return (0); 2644 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2645 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2646 nfsm_fhtom(vp, 1); 2647 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2648 txdr_hyper(offset, tl); 2649 tl += 2; 2650 *tl = txdr_unsigned(cnt); 2651 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2652 nfsm_wcc_data(vp, wccflag); 2653 if (!error) { 2654 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2655 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2656 NFSX_V3WRITEVERF)) { 2657 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2658 NFSX_V3WRITEVERF); 2659 error = NFSERR_STALEWRITEVERF; 2660 } 2661 } 2662 nfsm_reqdone; 2663 return (error); 2664 } 2665 2666 /* 2667 * Kludge City.. 2668 * - make nfs_bmap() essentially a no-op that does no translation 2669 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2670 * (Maybe I could use the process's page mapping, but I was concerned that 2671 * Kernel Write might not be enabled and also figured copyout() would do 2672 * a lot more work than memcpy() and also it currently happens in the 2673 * context of the swapper process (2). 2674 */ 2675 int 2676 nfs_bmap(v) 2677 void *v; 2678 { 2679 struct vop_bmap_args /* { 2680 struct vnode *a_vp; 2681 daddr_t a_bn; 2682 struct vnode **a_vpp; 2683 daddr_t *a_bnp; 2684 int *a_runp; 2685 } */ *ap = v; 2686 struct vnode *vp = ap->a_vp; 2687 2688 if (ap->a_vpp != NULL) 2689 *ap->a_vpp = vp; 2690 if (ap->a_bnp != NULL) 2691 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2692 return (0); 2693 } 2694 2695 /* 2696 * Strategy routine. 2697 * For async requests when nfsiod(s) are running, queue the request by 2698 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2699 * request. 2700 */ 2701 int 2702 nfs_strategy(v) 2703 void *v; 2704 { 2705 struct vop_strategy_args *ap = v; 2706 struct buf *bp = ap->a_bp; 2707 struct proc *p; 2708 int error = 0; 2709 2710 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2711 panic("nfs physio/async"); 2712 if (bp->b_flags & B_ASYNC) 2713 p = NULL; 2714 else 2715 p = curproc; /* XXX */ 2716 2717 /* 2718 * If the op is asynchronous and an i/o daemon is waiting 2719 * queue the request, wake it up and wait for completion 2720 * otherwise just do it ourselves. 2721 */ 2722 2723 if ((bp->b_flags & B_ASYNC) == 0 || 2724 nfs_asyncio(bp)) 2725 error = nfs_doio(bp, p); 2726 return (error); 2727 } 2728 2729 /* 2730 * Mmap a file 2731 * 2732 * NB Currently unsupported. 2733 */ 2734 /* ARGSUSED */ 2735 int 2736 nfs_mmap(v) 2737 void *v; 2738 { 2739 #if 0 2740 struct vop_mmap_args /* { 2741 struct vnode *a_vp; 2742 int a_fflags; 2743 struct ucred *a_cred; 2744 struct proc *a_p; 2745 } */ *ap = v; 2746 #endif 2747 2748 return (EINVAL); 2749 } 2750 2751 /* 2752 * fsync vnode op. Just call nfs_flush() with commit == 1. 2753 */ 2754 /* ARGSUSED */ 2755 int 2756 nfs_fsync(v) 2757 void *v; 2758 { 2759 struct vop_fsync_args /* { 2760 struct vnodeop_desc *a_desc; 2761 struct vnode * a_vp; 2762 struct ucred * a_cred; 2763 int a_flags; 2764 off_t offlo; 2765 off_t offhi; 2766 struct proc * a_p; 2767 } */ *ap = v; 2768 2769 return (nfs_flush(ap->a_vp, ap->a_cred, 2770 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2771 } 2772 2773 /* 2774 * Flush all the data associated with a vnode. 2775 */ 2776 int 2777 nfs_flush(vp, cred, waitfor, p, commit) 2778 struct vnode *vp; 2779 struct ucred *cred; 2780 int waitfor; 2781 struct proc *p; 2782 int commit; 2783 { 2784 struct uvm_object *uobj = &vp->v_uvm.u_obj; 2785 struct nfsnode *np = VTONFS(vp); 2786 int error; 2787 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2788 int rv; 2789 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2790 2791 error = 0; 2792 simple_lock(&uobj->vmobjlock); 2793 rv = (uobj->pgops->pgo_flush)(uobj, 0, 0, flushflags); 2794 simple_unlock(&uobj->vmobjlock); 2795 if (!rv) { 2796 error = EIO; 2797 } 2798 if (np->n_flag & NWRITEERR) { 2799 error = np->n_error; 2800 np->n_flag &= ~NWRITEERR; 2801 } 2802 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2803 return (error); 2804 } 2805 2806 /* 2807 * Return POSIX pathconf information applicable to nfs. 2808 * 2809 * N.B. The NFS V2 protocol doesn't support this RPC. 2810 */ 2811 /* ARGSUSED */ 2812 int 2813 nfs_pathconf(v) 2814 void *v; 2815 { 2816 struct vop_pathconf_args /* { 2817 struct vnode *a_vp; 2818 int a_name; 2819 register_t *a_retval; 2820 } */ *ap = v; 2821 struct nfsv3_pathconf *pcp; 2822 struct vnode *vp = ap->a_vp; 2823 struct nfsmount *nmp; 2824 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2825 int32_t t1, t2; 2826 u_int32_t *tl; 2827 caddr_t bpos, dpos, cp, cp2; 2828 int error = 0, attrflag; 2829 unsigned int l; 2830 u_int64_t maxsize; 2831 const int v3 = NFS_ISV3(vp); 2832 2833 switch (ap->a_name) { 2834 /* Names that can be resolved locally. */ 2835 case _PC_PIPE_BUF: 2836 *ap->a_retval = PIPE_BUF; 2837 break; 2838 case _PC_SYNC_IO: 2839 *ap->a_retval = 1; 2840 break; 2841 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2842 case _PC_LINK_MAX: 2843 case _PC_NAME_MAX: 2844 case _PC_CHOWN_RESTRICTED: 2845 case _PC_NO_TRUNC: 2846 if (!v3) { 2847 error = EINVAL; 2848 break; 2849 } 2850 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2851 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2852 nfsm_fhtom(vp, 1); 2853 nfsm_request(vp, NFSPROC_PATHCONF, 2854 curproc, curproc->p_ucred); /* XXX */ 2855 nfsm_postop_attr(vp, attrflag); 2856 if (!error) { 2857 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2858 NFSX_V3PATHCONF); 2859 switch (ap->a_name) { 2860 case _PC_LINK_MAX: 2861 *ap->a_retval = 2862 fxdr_unsigned(register_t, pcp->pc_linkmax); 2863 break; 2864 case _PC_NAME_MAX: 2865 *ap->a_retval = 2866 fxdr_unsigned(register_t, pcp->pc_namemax); 2867 break; 2868 case _PC_CHOWN_RESTRICTED: 2869 *ap->a_retval = 2870 (pcp->pc_chownrestricted == nfs_true); 2871 break; 2872 case _PC_NO_TRUNC: 2873 *ap->a_retval = 2874 (pcp->pc_notrunc == nfs_true); 2875 break; 2876 } 2877 } 2878 nfsm_reqdone; 2879 break; 2880 case _PC_FILESIZEBITS: 2881 if (v3) { 2882 nmp = VFSTONFS(vp->v_mount); 2883 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2884 if ((error = nfs_fsinfo(nmp, vp, 2885 curproc->p_ucred, curproc)) != 0) /* XXX */ 2886 break; 2887 for (l = 0, maxsize = nmp->nm_maxfilesize; 2888 (maxsize >> l) > 0; l++) 2889 ; 2890 *ap->a_retval = l + 1; 2891 } else { 2892 *ap->a_retval = 32; /* NFS V2 limitation */ 2893 } 2894 break; 2895 default: 2896 error = EINVAL; 2897 break; 2898 } 2899 2900 return (error); 2901 } 2902 2903 /* 2904 * NFS advisory byte-level locks. 2905 */ 2906 int 2907 nfs_advlock(v) 2908 void *v; 2909 { 2910 struct vop_advlock_args /* { 2911 struct vnode *a_vp; 2912 caddr_t a_id; 2913 int a_op; 2914 struct flock *a_fl; 2915 int a_flags; 2916 } */ *ap = v; 2917 struct nfsnode *np = VTONFS(ap->a_vp); 2918 2919 return lf_advlock(ap, &np->n_lockf, np->n_size); 2920 } 2921 2922 /* 2923 * Print out the contents of an nfsnode. 2924 */ 2925 int 2926 nfs_print(v) 2927 void *v; 2928 { 2929 struct vop_print_args /* { 2930 struct vnode *a_vp; 2931 } */ *ap = v; 2932 struct vnode *vp = ap->a_vp; 2933 struct nfsnode *np = VTONFS(vp); 2934 2935 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 2936 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 2937 if (vp->v_type == VFIFO) 2938 fifo_printinfo(vp); 2939 printf("\n"); 2940 return (0); 2941 } 2942 2943 /* 2944 * NFS file truncation. 2945 */ 2946 int 2947 nfs_truncate(v) 2948 void *v; 2949 { 2950 #if 0 2951 struct vop_truncate_args /* { 2952 struct vnode *a_vp; 2953 off_t a_length; 2954 int a_flags; 2955 struct ucred *a_cred; 2956 struct proc *a_p; 2957 } */ *ap = v; 2958 #endif 2959 2960 /* Use nfs_setattr */ 2961 return (EOPNOTSUPP); 2962 } 2963 2964 /* 2965 * NFS update. 2966 */ 2967 int 2968 nfs_update(v) 2969 void *v; 2970 #if 0 2971 struct vop_update_args /* { 2972 struct vnode *a_vp; 2973 struct timespec *a_ta; 2974 struct timespec *a_tm; 2975 int a_waitfor; 2976 } */ *ap = v; 2977 #endif 2978 { 2979 2980 /* Use nfs_setattr */ 2981 return (EOPNOTSUPP); 2982 } 2983 2984 /* 2985 * Just call bwrite(). 2986 */ 2987 int 2988 nfs_bwrite(v) 2989 void *v; 2990 { 2991 struct vop_bwrite_args /* { 2992 struct vnode *a_bp; 2993 } */ *ap = v; 2994 2995 return (bwrite(ap->a_bp)); 2996 } 2997 2998 /* 2999 * nfs special file access vnode op. 3000 * Essentially just get vattr and then imitate iaccess() since the device is 3001 * local to the client. 3002 */ 3003 int 3004 nfsspec_access(v) 3005 void *v; 3006 { 3007 struct vop_access_args /* { 3008 struct vnode *a_vp; 3009 int a_mode; 3010 struct ucred *a_cred; 3011 struct proc *a_p; 3012 } */ *ap = v; 3013 struct vattr va; 3014 struct vnode *vp = ap->a_vp; 3015 int error; 3016 3017 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3018 if (error) 3019 return (error); 3020 3021 /* 3022 * Disallow write attempts on filesystems mounted read-only; 3023 * unless the file is a socket, fifo, or a block or character 3024 * device resident on the filesystem. 3025 */ 3026 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3027 switch (vp->v_type) { 3028 case VREG: 3029 case VDIR: 3030 case VLNK: 3031 return (EROFS); 3032 default: 3033 break; 3034 } 3035 } 3036 3037 return (vaccess(va.va_type, va.va_mode, 3038 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3039 } 3040 3041 /* 3042 * Read wrapper for special devices. 3043 */ 3044 int 3045 nfsspec_read(v) 3046 void *v; 3047 { 3048 struct vop_read_args /* { 3049 struct vnode *a_vp; 3050 struct uio *a_uio; 3051 int a_ioflag; 3052 struct ucred *a_cred; 3053 } */ *ap = v; 3054 struct nfsnode *np = VTONFS(ap->a_vp); 3055 3056 /* 3057 * Set access flag. 3058 */ 3059 np->n_flag |= NACC; 3060 np->n_atim.tv_sec = time.tv_sec; 3061 np->n_atim.tv_nsec = time.tv_usec * 1000; 3062 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3063 } 3064 3065 /* 3066 * Write wrapper for special devices. 3067 */ 3068 int 3069 nfsspec_write(v) 3070 void *v; 3071 { 3072 struct vop_write_args /* { 3073 struct vnode *a_vp; 3074 struct uio *a_uio; 3075 int a_ioflag; 3076 struct ucred *a_cred; 3077 } */ *ap = v; 3078 struct nfsnode *np = VTONFS(ap->a_vp); 3079 3080 /* 3081 * Set update flag. 3082 */ 3083 np->n_flag |= NUPD; 3084 np->n_mtim.tv_sec = time.tv_sec; 3085 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3086 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3087 } 3088 3089 /* 3090 * Close wrapper for special devices. 3091 * 3092 * Update the times on the nfsnode then do device close. 3093 */ 3094 int 3095 nfsspec_close(v) 3096 void *v; 3097 { 3098 struct vop_close_args /* { 3099 struct vnode *a_vp; 3100 int a_fflag; 3101 struct ucred *a_cred; 3102 struct proc *a_p; 3103 } */ *ap = v; 3104 struct vnode *vp = ap->a_vp; 3105 struct nfsnode *np = VTONFS(vp); 3106 struct vattr vattr; 3107 3108 if (np->n_flag & (NACC | NUPD)) { 3109 np->n_flag |= NCHG; 3110 if (vp->v_usecount == 1 && 3111 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3112 VATTR_NULL(&vattr); 3113 if (np->n_flag & NACC) 3114 vattr.va_atime = np->n_atim; 3115 if (np->n_flag & NUPD) 3116 vattr.va_mtime = np->n_mtim; 3117 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3118 } 3119 } 3120 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3121 } 3122 3123 /* 3124 * Read wrapper for fifos. 3125 */ 3126 int 3127 nfsfifo_read(v) 3128 void *v; 3129 { 3130 struct vop_read_args /* { 3131 struct vnode *a_vp; 3132 struct uio *a_uio; 3133 int a_ioflag; 3134 struct ucred *a_cred; 3135 } */ *ap = v; 3136 struct nfsnode *np = VTONFS(ap->a_vp); 3137 3138 /* 3139 * Set access flag. 3140 */ 3141 np->n_flag |= NACC; 3142 np->n_atim.tv_sec = time.tv_sec; 3143 np->n_atim.tv_nsec = time.tv_usec * 1000; 3144 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3145 } 3146 3147 /* 3148 * Write wrapper for fifos. 3149 */ 3150 int 3151 nfsfifo_write(v) 3152 void *v; 3153 { 3154 struct vop_write_args /* { 3155 struct vnode *a_vp; 3156 struct uio *a_uio; 3157 int a_ioflag; 3158 struct ucred *a_cred; 3159 } */ *ap = v; 3160 struct nfsnode *np = VTONFS(ap->a_vp); 3161 3162 /* 3163 * Set update flag. 3164 */ 3165 np->n_flag |= NUPD; 3166 np->n_mtim.tv_sec = time.tv_sec; 3167 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3168 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3169 } 3170 3171 /* 3172 * Close wrapper for fifos. 3173 * 3174 * Update the times on the nfsnode then do fifo close. 3175 */ 3176 int 3177 nfsfifo_close(v) 3178 void *v; 3179 { 3180 struct vop_close_args /* { 3181 struct vnode *a_vp; 3182 int a_fflag; 3183 struct ucred *a_cred; 3184 struct proc *a_p; 3185 } */ *ap = v; 3186 struct vnode *vp = ap->a_vp; 3187 struct nfsnode *np = VTONFS(vp); 3188 struct vattr vattr; 3189 3190 if (np->n_flag & (NACC | NUPD)) { 3191 if (np->n_flag & NACC) { 3192 np->n_atim.tv_sec = time.tv_sec; 3193 np->n_atim.tv_nsec = time.tv_usec * 1000; 3194 } 3195 if (np->n_flag & NUPD) { 3196 np->n_mtim.tv_sec = time.tv_sec; 3197 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3198 } 3199 np->n_flag |= NCHG; 3200 if (vp->v_usecount == 1 && 3201 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3202 VATTR_NULL(&vattr); 3203 if (np->n_flag & NACC) 3204 vattr.va_atime = np->n_atim; 3205 if (np->n_flag & NUPD) 3206 vattr.va_mtime = np->n_mtim; 3207 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3208 } 3209 } 3210 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3211 } 3212