nfs_vnops.c revision 1.227
1 /* $NetBSD: nfs_vnops.c,v 1.227 2005/09/19 00:49:52 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * vnode op calls for Sun NFS version 2 and 3 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.227 2005/09/19 00:49:52 christos Exp $"); 43 44 #include "opt_inet.h" 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/hash.h> 63 #include <sys/lockf.h> 64 #include <sys/stat.h> 65 #include <sys/unistd.h> 66 67 #include <uvm/uvm_extern.h> 68 #include <uvm/uvm.h> 69 70 #include <miscfs/fifofs/fifo.h> 71 #include <miscfs/genfs/genfs.h> 72 #include <miscfs/specfs/specdev.h> 73 74 #include <nfs/rpcv2.h> 75 #include <nfs/nfsproto.h> 76 #include <nfs/nfs.h> 77 #include <nfs/nfsnode.h> 78 #include <nfs/nfsmount.h> 79 #include <nfs/xdr_subs.h> 80 #include <nfs/nfsm_subs.h> 81 #include <nfs/nqnfs.h> 82 #include <nfs/nfs_var.h> 83 84 #include <net/if.h> 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 88 /* 89 * Global vfs data structures for nfs 90 */ 91 int (**nfsv2_vnodeop_p) __P((void *)); 92 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 93 { &vop_default_desc, vn_default_error }, 94 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 95 { &vop_create_desc, nfs_create }, /* create */ 96 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 97 { &vop_open_desc, nfs_open }, /* open */ 98 { &vop_close_desc, nfs_close }, /* close */ 99 { &vop_access_desc, nfs_access }, /* access */ 100 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 101 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 102 { &vop_read_desc, nfs_read }, /* read */ 103 { &vop_write_desc, nfs_write }, /* write */ 104 { &vop_lease_desc, nfs_lease_check }, /* lease */ 105 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 106 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 107 { &vop_poll_desc, nfs_poll }, /* poll */ 108 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 109 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 110 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 111 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 112 { &vop_seek_desc, nfs_seek }, /* seek */ 113 { &vop_remove_desc, nfs_remove }, /* remove */ 114 { &vop_link_desc, nfs_link }, /* link */ 115 { &vop_rename_desc, nfs_rename }, /* rename */ 116 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 117 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 118 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 119 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 120 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 121 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 122 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 123 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 124 { &vop_lock_desc, nfs_lock }, /* lock */ 125 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 126 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 127 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 128 { &vop_print_desc, nfs_print }, /* print */ 129 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 130 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 131 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 132 { &vop_blkatoff_desc, genfs_badop }, /* blkatoff */ 133 { &vop_valloc_desc, genfs_badop }, /* valloc */ 134 { &vop_reallocblks_desc, genfs_badop }, /* reallocblks */ 135 { &vop_vfree_desc, genfs_badop }, /* vfree */ 136 { &vop_truncate_desc, genfs_badop }, /* truncate */ 137 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 138 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 139 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 140 { NULL, NULL } 141 }; 142 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 143 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 144 145 /* 146 * Special device vnode ops 147 */ 148 int (**spec_nfsv2nodeop_p) __P((void *)); 149 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 150 { &vop_default_desc, vn_default_error }, 151 { &vop_lookup_desc, spec_lookup }, /* lookup */ 152 { &vop_create_desc, spec_create }, /* create */ 153 { &vop_mknod_desc, spec_mknod }, /* mknod */ 154 { &vop_open_desc, spec_open }, /* open */ 155 { &vop_close_desc, nfsspec_close }, /* close */ 156 { &vop_access_desc, nfsspec_access }, /* access */ 157 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 158 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 159 { &vop_read_desc, nfsspec_read }, /* read */ 160 { &vop_write_desc, nfsspec_write }, /* write */ 161 { &vop_lease_desc, spec_lease_check }, /* lease */ 162 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 163 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 164 { &vop_poll_desc, spec_poll }, /* poll */ 165 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 166 { &vop_revoke_desc, spec_revoke }, /* revoke */ 167 { &vop_mmap_desc, spec_mmap }, /* mmap */ 168 { &vop_fsync_desc, spec_fsync }, /* fsync */ 169 { &vop_seek_desc, spec_seek }, /* seek */ 170 { &vop_remove_desc, spec_remove }, /* remove */ 171 { &vop_link_desc, spec_link }, /* link */ 172 { &vop_rename_desc, spec_rename }, /* rename */ 173 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 174 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 175 { &vop_symlink_desc, spec_symlink }, /* symlink */ 176 { &vop_readdir_desc, spec_readdir }, /* readdir */ 177 { &vop_readlink_desc, spec_readlink }, /* readlink */ 178 { &vop_abortop_desc, spec_abortop }, /* abortop */ 179 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 180 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 181 { &vop_lock_desc, nfs_lock }, /* lock */ 182 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 183 { &vop_bmap_desc, spec_bmap }, /* bmap */ 184 { &vop_strategy_desc, spec_strategy }, /* strategy */ 185 { &vop_print_desc, nfs_print }, /* print */ 186 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 187 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 188 { &vop_advlock_desc, spec_advlock }, /* advlock */ 189 { &vop_blkatoff_desc, genfs_badop }, /* blkatoff */ 190 { &vop_valloc_desc, genfs_badop }, /* valloc */ 191 { &vop_reallocblks_desc, genfs_badop }, /* reallocblks */ 192 { &vop_vfree_desc, genfs_badop }, /* vfree */ 193 { &vop_truncate_desc, genfs_badop }, /* truncate */ 194 { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ 195 { &vop_getpages_desc, spec_getpages }, /* getpages */ 196 { &vop_putpages_desc, spec_putpages }, /* putpages */ 197 { NULL, NULL } 198 }; 199 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 200 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 201 202 int (**fifo_nfsv2nodeop_p) __P((void *)); 203 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 204 { &vop_default_desc, vn_default_error }, 205 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 206 { &vop_create_desc, fifo_create }, /* create */ 207 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 208 { &vop_open_desc, fifo_open }, /* open */ 209 { &vop_close_desc, nfsfifo_close }, /* close */ 210 { &vop_access_desc, nfsspec_access }, /* access */ 211 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 212 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 213 { &vop_read_desc, nfsfifo_read }, /* read */ 214 { &vop_write_desc, nfsfifo_write }, /* write */ 215 { &vop_lease_desc, fifo_lease_check }, /* lease */ 216 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 217 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 218 { &vop_poll_desc, fifo_poll }, /* poll */ 219 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 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, genfs_badop }, /* blkatoff */ 244 { &vop_valloc_desc, genfs_badop }, /* valloc */ 245 { &vop_reallocblks_desc, genfs_badop }, /* reallocblks */ 246 { &vop_vfree_desc, genfs_badop }, /* vfree */ 247 { &vop_truncate_desc, genfs_badop }, /* truncate */ 248 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 249 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 250 { NULL, NULL } 251 }; 252 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 253 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 254 255 static void nfs_writerpc_extfree(struct mbuf *, caddr_t, size_t, void *); 256 257 /* 258 * Global variables 259 */ 260 extern u_int32_t nfs_true, nfs_false; 261 extern u_int32_t nfs_xdrneg1; 262 extern const nfstype nfsv3_type[9]; 263 264 int nfs_numasync = 0; 265 #define DIRHDSIZ _DIRENT_NAMEOFF(dp) 266 #define UIO_ADVANCE(uio, siz) \ 267 (void)((uio)->uio_resid -= (siz), \ 268 (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ 269 (uio)->uio_iov->iov_len -= (siz)) 270 271 static void nfs_cache_enter(struct vnode *, struct vnode *, 272 struct componentname *); 273 274 static void 275 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 276 struct componentname *cnp) 277 { 278 struct nfsnode *dnp = VTONFS(dvp); 279 280 if (vp != NULL) { 281 struct nfsnode *np = VTONFS(vp); 282 283 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 284 } 285 286 if (!timespecisset(&dnp->n_nctime)) 287 dnp->n_nctime = dnp->n_vattr->va_mtime; 288 289 cache_enter(dvp, vp, cnp); 290 } 291 292 /* 293 * nfs null call from vfs. 294 */ 295 int 296 nfs_null(vp, cred, procp) 297 struct vnode *vp; 298 struct ucred *cred; 299 struct proc *procp; 300 { 301 caddr_t bpos, dpos; 302 int error = 0; 303 struct mbuf *mreq, *mrep, *md, *mb; 304 struct nfsnode *np = VTONFS(vp); 305 306 nfsm_reqhead(np, NFSPROC_NULL, 0); 307 nfsm_request(np, NFSPROC_NULL, procp, cred); 308 nfsm_reqdone; 309 return (error); 310 } 311 312 /* 313 * nfs access vnode op. 314 * For nfs version 2, just return ok. File accesses may fail later. 315 * For nfs version 3, use the access rpc to check accessibility. If file modes 316 * are changed on the server, accesses might still fail later. 317 */ 318 int 319 nfs_access(v) 320 void *v; 321 { 322 struct vop_access_args /* { 323 struct vnode *a_vp; 324 int a_mode; 325 struct ucred *a_cred; 326 struct proc *a_p; 327 } */ *ap = v; 328 struct vnode *vp = ap->a_vp; 329 #ifndef NFS_V2_ONLY 330 u_int32_t *tl; 331 caddr_t cp; 332 int32_t t1, t2; 333 caddr_t bpos, dpos, cp2; 334 int error = 0, attrflag; 335 struct mbuf *mreq, *mrep, *md, *mb; 336 u_int32_t mode, rmode; 337 const int v3 = NFS_ISV3(vp); 338 #endif 339 int cachevalid; 340 struct nfsnode *np = VTONFS(vp); 341 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 342 343 cachevalid = (np->n_accstamp != -1 && 344 (mono_time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(nmp, np) && 345 np->n_accuid == ap->a_cred->cr_uid); 346 347 /* 348 * Check access cache first. If this request has been made for this 349 * uid shortly before, use the cached result. 350 */ 351 if (cachevalid) { 352 if (!np->n_accerror) { 353 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 354 return np->n_accerror; 355 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 356 return np->n_accerror; 357 } 358 359 #ifndef NFS_V2_ONLY 360 /* 361 * For nfs v3, do an access rpc, otherwise you are stuck emulating 362 * ufs_access() locally using the vattr. This may not be correct, 363 * since the server may apply other access criteria such as 364 * client uid-->server uid mapping that we do not know about, but 365 * this is better than just returning anything that is lying about 366 * in the cache. 367 */ 368 if (v3) { 369 nfsstats.rpccnt[NFSPROC_ACCESS]++; 370 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 371 nfsm_fhtom(np, v3); 372 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 373 if (ap->a_mode & VREAD) 374 mode = NFSV3ACCESS_READ; 375 else 376 mode = 0; 377 if (vp->v_type != VDIR) { 378 if (ap->a_mode & VWRITE) 379 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 380 if (ap->a_mode & VEXEC) 381 mode |= NFSV3ACCESS_EXECUTE; 382 } else { 383 if (ap->a_mode & VWRITE) 384 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 385 NFSV3ACCESS_DELETE); 386 if (ap->a_mode & VEXEC) 387 mode |= NFSV3ACCESS_LOOKUP; 388 } 389 *tl = txdr_unsigned(mode); 390 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 391 nfsm_postop_attr(vp, attrflag, 0); 392 if (!error) { 393 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 394 rmode = fxdr_unsigned(u_int32_t, *tl); 395 /* 396 * The NFS V3 spec does not clarify whether or not 397 * the returned access bits can be a superset of 398 * the ones requested, so... 399 */ 400 if ((rmode & mode) != mode) 401 error = EACCES; 402 } 403 nfsm_reqdone; 404 } else 405 #endif 406 return (nfsspec_access(ap)); 407 #ifndef NFS_V2_ONLY 408 /* 409 * Disallow write attempts on filesystems mounted read-only; 410 * unless the file is a socket, fifo, or a block or character 411 * device resident on the filesystem. 412 */ 413 if (!error && (ap->a_mode & VWRITE) && 414 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 415 switch (vp->v_type) { 416 case VREG: 417 case VDIR: 418 case VLNK: 419 error = EROFS; 420 default: 421 break; 422 } 423 } 424 425 if (!error || error == EACCES) { 426 /* 427 * If we got the same result as for a previous, 428 * different request, OR it in. Don't update 429 * the timestamp in that case. 430 */ 431 if (cachevalid && np->n_accstamp != -1 && 432 error == np->n_accerror) { 433 if (!error) 434 np->n_accmode |= ap->a_mode; 435 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 436 np->n_accmode = ap->a_mode; 437 } else { 438 np->n_accstamp = mono_time.tv_sec; 439 np->n_accuid = ap->a_cred->cr_uid; 440 np->n_accmode = ap->a_mode; 441 np->n_accerror = error; 442 } 443 } 444 445 return (error); 446 #endif 447 } 448 449 /* 450 * nfs open vnode op 451 * Check to see if the type is ok 452 * and that deletion is not in progress. 453 * For paged in text files, you will need to flush the page cache 454 * if consistency is lost. 455 */ 456 /* ARGSUSED */ 457 int 458 nfs_open(v) 459 void *v; 460 { 461 struct vop_open_args /* { 462 struct vnode *a_vp; 463 int a_mode; 464 struct ucred *a_cred; 465 struct proc *a_p; 466 } */ *ap = v; 467 struct vnode *vp = ap->a_vp; 468 struct nfsnode *np = VTONFS(vp); 469 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 470 int error; 471 472 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 473 return (EACCES); 474 } 475 476 if (ap->a_mode & FREAD) { 477 if (np->n_rcred != NULL) 478 crfree(np->n_rcred); 479 np->n_rcred = ap->a_cred; 480 crhold(np->n_rcred); 481 } 482 if (ap->a_mode & FWRITE) { 483 if (np->n_wcred != NULL) 484 crfree(np->n_wcred); 485 np->n_wcred = ap->a_cred; 486 crhold(np->n_wcred); 487 } 488 489 #ifndef NFS_V2_ONLY 490 /* 491 * Get a valid lease. If cached data is stale, flush it. 492 */ 493 if (nmp->nm_flag & NFSMNT_NQNFS) { 494 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 495 do { 496 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 497 ap->a_p); 498 } while (error == NQNFS_EXPIRED); 499 if (error) 500 return (error); 501 if (np->n_lrev != np->n_brev || 502 (np->n_flag & NQNFSNONCACHE)) { 503 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 504 ap->a_p, 1)) == EINTR) 505 return (error); 506 np->n_brev = np->n_lrev; 507 } 508 } 509 } else 510 #endif 511 { 512 error = nfs_flushstalebuf(vp, ap->a_cred, ap->a_p, 0); 513 if (error) 514 return error; 515 } 516 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 517 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 518 return (0); 519 } 520 521 /* 522 * nfs close vnode op 523 * What an NFS client should do upon close after writing is a debatable issue. 524 * Most NFS clients push delayed writes to the server upon close, basically for 525 * two reasons: 526 * 1 - So that any write errors may be reported back to the client process 527 * doing the close system call. By far the two most likely errors are 528 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 529 * 2 - To put a worst case upper bound on cache inconsistency between 530 * multiple clients for the file. 531 * There is also a consistency problem for Version 2 of the protocol w.r.t. 532 * not being able to tell if other clients are writing a file concurrently, 533 * since there is no way of knowing if the changed modify time in the reply 534 * is only due to the write for this client. 535 * (NFS Version 3 provides weak cache consistency data in the reply that 536 * should be sufficient to detect and handle this case.) 537 * 538 * The current code does the following: 539 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 540 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 541 * or commit them (this satisfies 1 and 2 except for the 542 * case where the server crashes after this close but 543 * before the commit RPC, which is felt to be "good 544 * enough". Changing the last argument to nfs_flush() to 545 * a 1 would force a commit operation, if it is felt a 546 * commit is necessary now. 547 * for NQNFS - do nothing now, since 2 is dealt with via leases and 548 * 1 should be dealt with via an fsync() system call for 549 * cases where write errors are important. 550 */ 551 /* ARGSUSED */ 552 int 553 nfs_close(v) 554 void *v; 555 { 556 struct vop_close_args /* { 557 struct vnodeop_desc *a_desc; 558 struct vnode *a_vp; 559 int a_fflag; 560 struct ucred *a_cred; 561 struct proc *a_p; 562 } */ *ap = v; 563 struct vnode *vp = ap->a_vp; 564 struct nfsnode *np = VTONFS(vp); 565 int error = 0; 566 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 567 568 if (vp->v_type == VREG) { 569 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 570 (np->n_flag & NMODIFIED)) { 571 #ifndef NFS_V2_ONLY 572 if (NFS_ISV3(vp)) { 573 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 574 np->n_flag &= ~NMODIFIED; 575 } else 576 #endif 577 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 578 NFS_INVALIDATE_ATTRCACHE(np); 579 } 580 if (np->n_flag & NWRITEERR) { 581 np->n_flag &= ~NWRITEERR; 582 error = np->n_error; 583 } 584 } 585 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 586 return (error); 587 } 588 589 /* 590 * nfs getattr call from vfs. 591 */ 592 int 593 nfs_getattr(v) 594 void *v; 595 { 596 struct vop_getattr_args /* { 597 struct vnode *a_vp; 598 struct vattr *a_vap; 599 struct ucred *a_cred; 600 struct proc *a_p; 601 } */ *ap = v; 602 struct vnode *vp = ap->a_vp; 603 struct nfsnode *np = VTONFS(vp); 604 caddr_t cp; 605 u_int32_t *tl; 606 int32_t t1, t2; 607 caddr_t bpos, dpos; 608 int error = 0; 609 struct mbuf *mreq, *mrep, *md, *mb; 610 const int v3 = NFS_ISV3(vp); 611 612 /* 613 * Update local times for special files. 614 */ 615 if (np->n_flag & (NACC | NUPD)) 616 np->n_flag |= NCHG; 617 618 /* 619 * if we have delayed truncation, do it now. 620 */ 621 nfs_delayedtruncate(vp); 622 623 /* 624 * First look in the cache. 625 */ 626 if (nfs_getattrcache(vp, ap->a_vap) == 0) 627 return (0); 628 nfsstats.rpccnt[NFSPROC_GETATTR]++; 629 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 630 nfsm_fhtom(np, v3); 631 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 632 if (!error) { 633 nfsm_loadattr(vp, ap->a_vap, 0); 634 if (vp->v_type == VDIR && 635 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 636 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 637 } 638 nfsm_reqdone; 639 return (error); 640 } 641 642 /* 643 * nfs setattr call. 644 */ 645 int 646 nfs_setattr(v) 647 void *v; 648 { 649 struct vop_setattr_args /* { 650 struct vnodeop_desc *a_desc; 651 struct vnode *a_vp; 652 struct vattr *a_vap; 653 struct ucred *a_cred; 654 struct proc *a_p; 655 } */ *ap = v; 656 struct vnode *vp = ap->a_vp; 657 struct nfsnode *np = VTONFS(vp); 658 struct vattr *vap = ap->a_vap; 659 int error = 0; 660 u_quad_t tsize = 0; 661 662 /* 663 * Setting of flags is not supported. 664 */ 665 if (vap->va_flags != VNOVAL) 666 return (EOPNOTSUPP); 667 668 /* 669 * Disallow write attempts if the filesystem is mounted read-only. 670 */ 671 if ((vap->va_uid != (uid_t)VNOVAL || 672 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 673 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 674 (vp->v_mount->mnt_flag & MNT_RDONLY)) 675 return (EROFS); 676 if (vap->va_size != VNOVAL) { 677 switch (vp->v_type) { 678 case VDIR: 679 return (EISDIR); 680 case VCHR: 681 case VBLK: 682 case VSOCK: 683 case VFIFO: 684 if (vap->va_mtime.tv_sec == VNOVAL && 685 vap->va_atime.tv_sec == VNOVAL && 686 vap->va_mode == (mode_t)VNOVAL && 687 vap->va_uid == (uid_t)VNOVAL && 688 vap->va_gid == (gid_t)VNOVAL) 689 return (0); 690 vap->va_size = VNOVAL; 691 break; 692 default: 693 /* 694 * Disallow write attempts if the filesystem is 695 * mounted read-only. 696 */ 697 if (vp->v_mount->mnt_flag & MNT_RDONLY) 698 return (EROFS); 699 uvm_vnp_setsize(vp, vap->va_size); 700 tsize = np->n_size; 701 np->n_size = vap->va_size; 702 if (vap->va_size == 0) 703 error = nfs_vinvalbuf(vp, 0, 704 ap->a_cred, ap->a_p, 1); 705 else 706 error = nfs_vinvalbuf(vp, V_SAVE, 707 ap->a_cred, ap->a_p, 1); 708 if (error) { 709 uvm_vnp_setsize(vp, tsize); 710 return (error); 711 } 712 np->n_vattr->va_size = vap->va_size; 713 } 714 } else if ((vap->va_mtime.tv_sec != VNOVAL || 715 vap->va_atime.tv_sec != VNOVAL) && 716 vp->v_type == VREG && 717 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 718 ap->a_p, 1)) == EINTR) 719 return (error); 720 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 721 if (error && vap->va_size != VNOVAL) { 722 np->n_size = np->n_vattr->va_size = tsize; 723 uvm_vnp_setsize(vp, np->n_size); 724 } 725 VN_KNOTE(vp, NOTE_ATTRIB); 726 return (error); 727 } 728 729 /* 730 * Do an nfs setattr rpc. 731 */ 732 int 733 nfs_setattrrpc(vp, vap, cred, procp) 734 struct vnode *vp; 735 struct vattr *vap; 736 struct ucred *cred; 737 struct proc *procp; 738 { 739 struct nfsv2_sattr *sp; 740 caddr_t cp; 741 int32_t t1, t2; 742 caddr_t bpos, dpos; 743 u_int32_t *tl; 744 int error = 0; 745 struct mbuf *mreq, *mrep, *md, *mb; 746 const int v3 = NFS_ISV3(vp); 747 struct nfsnode *np = VTONFS(vp); 748 #ifndef NFS_V2_ONLY 749 int wccflag = NFSV3_WCCRATTR; 750 caddr_t cp2; 751 #endif 752 753 nfsstats.rpccnt[NFSPROC_SETATTR]++; 754 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 755 nfsm_fhtom(np, v3); 756 #ifndef NFS_V2_ONLY 757 if (v3) { 758 nfsm_v3attrbuild(vap, TRUE); 759 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 760 *tl = nfs_false; 761 } else { 762 #endif 763 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 764 if (vap->va_mode == (mode_t)VNOVAL) 765 sp->sa_mode = nfs_xdrneg1; 766 else 767 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 768 if (vap->va_uid == (uid_t)VNOVAL) 769 sp->sa_uid = nfs_xdrneg1; 770 else 771 sp->sa_uid = txdr_unsigned(vap->va_uid); 772 if (vap->va_gid == (gid_t)VNOVAL) 773 sp->sa_gid = nfs_xdrneg1; 774 else 775 sp->sa_gid = txdr_unsigned(vap->va_gid); 776 sp->sa_size = txdr_unsigned(vap->va_size); 777 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 778 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 779 #ifndef NFS_V2_ONLY 780 } 781 #endif 782 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 783 #ifndef NFS_V2_ONLY 784 if (v3) { 785 nfsm_wcc_data(vp, wccflag, 0, FALSE); 786 } else 787 #endif 788 nfsm_loadattr(vp, (struct vattr *)0, 0); 789 nfsm_reqdone; 790 return (error); 791 } 792 793 /* 794 * nfs lookup call, one step at a time... 795 * First look in cache 796 * If not found, unlock the directory nfsnode and do the rpc 797 * 798 * This code is full of lock/unlock statements and checks, because 799 * we continue after cache_lookup has finished (we need to check 800 * with the attr cache and do an rpc if it has timed out). This means 801 * that the locking effects of cache_lookup have to be taken into 802 * account. 803 */ 804 int 805 nfs_lookup(v) 806 void *v; 807 { 808 struct vop_lookup_args /* { 809 struct vnodeop_desc *a_desc; 810 struct vnode *a_dvp; 811 struct vnode **a_vpp; 812 struct componentname *a_cnp; 813 } */ *ap = v; 814 struct componentname *cnp = ap->a_cnp; 815 struct vnode *dvp = ap->a_dvp; 816 struct vnode **vpp = ap->a_vpp; 817 int flags; 818 struct vnode *newvp; 819 u_int32_t *tl; 820 caddr_t cp; 821 int32_t t1, t2; 822 caddr_t bpos, dpos, cp2; 823 struct mbuf *mreq, *mrep, *md, *mb; 824 long len; 825 nfsfh_t *fhp; 826 struct nfsnode *np; 827 int lockparent, wantparent, error = 0, attrflag, fhsize; 828 const int v3 = NFS_ISV3(dvp); 829 830 cnp->cn_flags &= ~PDIRUNLOCK; 831 flags = cnp->cn_flags; 832 833 *vpp = NULLVP; 834 newvp = NULLVP; 835 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 836 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 837 return (EROFS); 838 if (dvp->v_type != VDIR) 839 return (ENOTDIR); 840 841 /* 842 * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. 843 */ 844 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 845 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 846 if (error) 847 return error; 848 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) 849 return EISDIR; 850 VREF(dvp); 851 *vpp = dvp; 852 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 853 cnp->cn_flags |= SAVENAME; 854 return 0; 855 } 856 857 lockparent = flags & LOCKPARENT; 858 wantparent = flags & (LOCKPARENT|WANTPARENT); 859 np = VTONFS(dvp); 860 861 /* 862 * Before tediously performing a linear scan of the directory, 863 * check the name cache to see if the directory/name pair 864 * we are looking for is known already. 865 * If the directory/name pair is found in the name cache, 866 * we have to ensure the directory has not changed from 867 * the time the cache entry has been created. If it has, 868 * the cache entry has to be ignored. 869 */ 870 error = cache_lookup_raw(dvp, vpp, cnp); 871 KASSERT(dvp != *vpp); 872 if (error >= 0) { 873 struct vattr vattr; 874 int err2; 875 876 if (error && error != ENOENT) { 877 *vpp = NULLVP; 878 return error; 879 } 880 881 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 882 if (err2 != 0) { 883 if (error == 0) 884 vrele(*vpp); 885 *vpp = NULLVP; 886 return err2; 887 } 888 889 if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 890 cnp->cn_proc) || timespeccmp(&vattr.va_mtime, 891 &VTONFS(dvp)->n_nctime, !=)) { 892 if (error == 0) { 893 vrele(*vpp); 894 *vpp = NULLVP; 895 } 896 cache_purge1(dvp, NULL, PURGE_CHILDREN); 897 timespecclear(&np->n_nctime); 898 goto dorpc; 899 } 900 901 if (error == ENOENT) { 902 goto noentry; 903 } 904 905 newvp = *vpp; 906 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 907 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 908 nfsstats.lookupcache_hits++; 909 if ((flags & ISDOTDOT) != 0 || 910 (~flags & (LOCKPARENT|ISLASTCN)) != 0) { 911 VOP_UNLOCK(dvp, 0); 912 cnp->cn_flags |= PDIRUNLOCK; 913 } 914 error = vn_lock(newvp, LK_EXCLUSIVE); 915 if (error) { 916 /* newvp has been revoked. */ 917 vrele(newvp); 918 *vpp = NULL; 919 return error; 920 } 921 if ((~flags & (LOCKPARENT|ISLASTCN)) == 0 922 && (cnp->cn_flags & PDIRUNLOCK)) { 923 KASSERT(flags & ISDOTDOT); 924 error = vn_lock(dvp, LK_EXCLUSIVE); 925 if (error) { 926 vput(newvp); 927 *vpp = NULL; 928 return error; 929 } 930 cnp->cn_flags &= ~PDIRUNLOCK; 931 } 932 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 933 cnp->cn_flags |= SAVENAME; 934 KASSERT(newvp->v_type != VNON); 935 return (0); 936 } 937 cache_purge1(newvp, NULL, PURGE_PARENTS); 938 vrele(newvp); 939 *vpp = NULLVP; 940 } 941 dorpc: 942 #if 0 943 /* 944 * because nfsv3 has the same CREATE semantics as ours, 945 * we don't have to perform LOOKUPs beforehand. 946 * 947 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 948 * XXX although we have no way to know if O_EXCL is requested or not. 949 */ 950 951 if (v3 && cnp->cn_nameiop == CREATE && 952 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 953 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 954 KASSERT(lockparent); 955 cnp->cn_flags |= SAVENAME; 956 return (EJUSTRETURN); 957 } 958 #endif /* 0 */ 959 960 error = 0; 961 newvp = NULLVP; 962 nfsstats.lookupcache_misses++; 963 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 964 len = cnp->cn_namelen; 965 nfsm_reqhead(np, NFSPROC_LOOKUP, 966 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 967 nfsm_fhtom(np, v3); 968 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 969 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 970 if (error) { 971 nfsm_postop_attr(dvp, attrflag, 0); 972 m_freem(mrep); 973 goto nfsmout; 974 } 975 nfsm_getfh(fhp, fhsize, v3); 976 977 /* 978 * Handle RENAME case... 979 */ 980 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 981 if (NFS_CMPFH(np, fhp, fhsize)) { 982 m_freem(mrep); 983 return (EISDIR); 984 } 985 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 986 if (error) { 987 m_freem(mrep); 988 return error; 989 } 990 newvp = NFSTOV(np); 991 #ifndef NFS_V2_ONLY 992 if (v3) { 993 nfsm_postop_attr(newvp, attrflag, 0); 994 nfsm_postop_attr(dvp, attrflag, 0); 995 } else 996 #endif 997 nfsm_loadattr(newvp, (struct vattr *)0, 0); 998 *vpp = newvp; 999 m_freem(mrep); 1000 cnp->cn_flags |= SAVENAME; 1001 if (!lockparent) { 1002 VOP_UNLOCK(dvp, 0); 1003 cnp->cn_flags |= PDIRUNLOCK; 1004 } 1005 goto validate; 1006 } 1007 1008 /* 1009 * The postop attr handling is duplicated for each if case, 1010 * because it should be done while dvp is locked (unlocking 1011 * dvp is different for each case). 1012 */ 1013 1014 if (NFS_CMPFH(np, fhp, fhsize)) { 1015 /* 1016 * "." lookup 1017 */ 1018 VREF(dvp); 1019 newvp = dvp; 1020 #ifndef NFS_V2_ONLY 1021 if (v3) { 1022 nfsm_postop_attr(newvp, attrflag, 0); 1023 nfsm_postop_attr(dvp, attrflag, 0); 1024 } else 1025 #endif 1026 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1027 } else if (flags & ISDOTDOT) { 1028 /* 1029 * ".." lookup 1030 */ 1031 VOP_UNLOCK(dvp, 0); 1032 cnp->cn_flags |= PDIRUNLOCK; 1033 1034 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1035 if (error) { 1036 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1037 cnp->cn_flags &= ~PDIRUNLOCK; 1038 m_freem(mrep); 1039 return error; 1040 } 1041 newvp = NFSTOV(np); 1042 1043 #ifndef NFS_V2_ONLY 1044 if (v3) { 1045 nfsm_postop_attr(newvp, attrflag, 0); 1046 nfsm_postop_attr(dvp, attrflag, 0); 1047 } else 1048 #endif 1049 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1050 1051 if (lockparent && (flags & ISLASTCN)) { 1052 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1053 m_freem(mrep); 1054 vput(newvp); 1055 return error; 1056 } 1057 cnp->cn_flags &= ~PDIRUNLOCK; 1058 } 1059 } else { 1060 /* 1061 * Other lookups. 1062 */ 1063 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1064 if (error) { 1065 m_freem(mrep); 1066 return error; 1067 } 1068 newvp = NFSTOV(np); 1069 #ifndef NFS_V2_ONLY 1070 if (v3) { 1071 nfsm_postop_attr(newvp, attrflag, 0); 1072 nfsm_postop_attr(dvp, attrflag, 0); 1073 } else 1074 #endif 1075 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1076 if (!lockparent || !(flags & ISLASTCN)) { 1077 VOP_UNLOCK(dvp, 0); 1078 cnp->cn_flags |= PDIRUNLOCK; 1079 } 1080 } 1081 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1082 cnp->cn_flags |= SAVENAME; 1083 if ((cnp->cn_flags & MAKEENTRY) && 1084 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1085 nfs_cache_enter(dvp, newvp, cnp); 1086 } 1087 *vpp = newvp; 1088 nfsm_reqdone; 1089 if (error) { 1090 /* 1091 * We get here only because of errors returned by 1092 * the RPC. Otherwise we'll have returned above 1093 * (the nfsm_* macros will jump to nfsm_reqdone 1094 * on error). 1095 */ 1096 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1097 cnp->cn_nameiop != CREATE) { 1098 nfs_cache_enter(dvp, NULL, cnp); 1099 } 1100 if (newvp != NULLVP) { 1101 vrele(newvp); 1102 if (newvp != dvp) 1103 VOP_UNLOCK(newvp, 0); 1104 } 1105 noentry: 1106 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1107 (flags & ISLASTCN) && error == ENOENT) { 1108 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1109 error = EROFS; 1110 } else { 1111 error = EJUSTRETURN; 1112 cnp->cn_flags |= SAVENAME; 1113 } 1114 } 1115 *vpp = NULL; 1116 return error; 1117 } 1118 1119 validate: 1120 /* 1121 * make sure we have valid type and size. 1122 */ 1123 1124 newvp = *vpp; 1125 if (newvp->v_type == VNON) { 1126 struct vattr vattr; /* dummy */ 1127 1128 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1129 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc); 1130 if (error) { 1131 vput(newvp); 1132 *vpp = NULL; 1133 } 1134 } 1135 1136 return error; 1137 } 1138 1139 /* 1140 * nfs read call. 1141 * Just call nfs_bioread() to do the work. 1142 */ 1143 int 1144 nfs_read(v) 1145 void *v; 1146 { 1147 struct vop_read_args /* { 1148 struct vnode *a_vp; 1149 struct uio *a_uio; 1150 int a_ioflag; 1151 struct ucred *a_cred; 1152 } */ *ap = v; 1153 struct vnode *vp = ap->a_vp; 1154 1155 if (vp->v_type != VREG) 1156 return (EPERM); 1157 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1158 } 1159 1160 /* 1161 * nfs readlink call 1162 */ 1163 int 1164 nfs_readlink(v) 1165 void *v; 1166 { 1167 struct vop_readlink_args /* { 1168 struct vnode *a_vp; 1169 struct uio *a_uio; 1170 struct ucred *a_cred; 1171 } */ *ap = v; 1172 struct vnode *vp = ap->a_vp; 1173 struct nfsnode *np = VTONFS(vp); 1174 1175 if (vp->v_type != VLNK) 1176 return (EPERM); 1177 1178 if (np->n_rcred != NULL) { 1179 crfree(np->n_rcred); 1180 } 1181 np->n_rcred = ap->a_cred; 1182 crhold(np->n_rcred); 1183 1184 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1185 } 1186 1187 /* 1188 * Do a readlink rpc. 1189 * Called by nfs_doio() from below the buffer cache. 1190 */ 1191 int 1192 nfs_readlinkrpc(vp, uiop, cred) 1193 struct vnode *vp; 1194 struct uio *uiop; 1195 struct ucred *cred; 1196 { 1197 u_int32_t *tl; 1198 caddr_t cp; 1199 int32_t t1, t2; 1200 caddr_t bpos, dpos, cp2; 1201 int error = 0; 1202 uint32_t len; 1203 struct mbuf *mreq, *mrep, *md, *mb; 1204 const int v3 = NFS_ISV3(vp); 1205 struct nfsnode *np = VTONFS(vp); 1206 #ifndef NFS_V2_ONLY 1207 int attrflag; 1208 #endif 1209 1210 nfsstats.rpccnt[NFSPROC_READLINK]++; 1211 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1212 nfsm_fhtom(np, v3); 1213 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1214 #ifndef NFS_V2_ONLY 1215 if (v3) 1216 nfsm_postop_attr(vp, attrflag, 0); 1217 #endif 1218 if (!error) { 1219 #ifndef NFS_V2_ONLY 1220 if (v3) { 1221 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1222 len = fxdr_unsigned(uint32_t, *tl); 1223 if (len > MAXPATHLEN) { 1224 /* 1225 * this pathname is too long for us. 1226 */ 1227 m_freem(mrep); 1228 /* Solaris returns EINVAL. should we follow? */ 1229 error = ENAMETOOLONG; 1230 goto nfsmout; 1231 } 1232 } else 1233 #endif 1234 { 1235 nfsm_strsiz(len, NFS_MAXPATHLEN); 1236 } 1237 nfsm_mtouio(uiop, len); 1238 } 1239 nfsm_reqdone; 1240 return (error); 1241 } 1242 1243 /* 1244 * nfs read rpc call 1245 * Ditto above 1246 */ 1247 int 1248 nfs_readrpc(vp, uiop) 1249 struct vnode *vp; 1250 struct uio *uiop; 1251 { 1252 u_int32_t *tl; 1253 caddr_t cp; 1254 int32_t t1, t2; 1255 caddr_t bpos, dpos, cp2; 1256 struct mbuf *mreq, *mrep, *md, *mb; 1257 struct nfsmount *nmp; 1258 int error = 0, len, retlen, tsiz, eof; 1259 const int v3 = NFS_ISV3(vp); 1260 struct nfsnode *np = VTONFS(vp); 1261 #ifndef NFS_V2_ONLY 1262 int attrflag; 1263 #endif 1264 1265 #ifndef nolint 1266 eof = 0; 1267 #endif 1268 nmp = VFSTONFS(vp->v_mount); 1269 tsiz = uiop->uio_resid; 1270 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1271 return (EFBIG); 1272 while (tsiz > 0) { 1273 nfsstats.rpccnt[NFSPROC_READ]++; 1274 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1275 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1276 nfsm_fhtom(np, v3); 1277 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1278 #ifndef NFS_V2_ONLY 1279 if (v3) { 1280 txdr_hyper(uiop->uio_offset, tl); 1281 *(tl + 2) = txdr_unsigned(len); 1282 } else 1283 #endif 1284 { 1285 *tl++ = txdr_unsigned(uiop->uio_offset); 1286 *tl++ = txdr_unsigned(len); 1287 *tl = 0; 1288 } 1289 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, np->n_rcred); 1290 #ifndef NFS_V2_ONLY 1291 if (v3) { 1292 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1293 if (error) { 1294 m_freem(mrep); 1295 goto nfsmout; 1296 } 1297 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1298 eof = fxdr_unsigned(int, *(tl + 1)); 1299 } else 1300 #endif 1301 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1302 nfsm_strsiz(retlen, nmp->nm_rsize); 1303 nfsm_mtouio(uiop, retlen); 1304 m_freem(mrep); 1305 tsiz -= retlen; 1306 #ifndef NFS_V2_ONLY 1307 if (v3) { 1308 if (eof || retlen == 0) 1309 tsiz = 0; 1310 } else 1311 #endif 1312 if (retlen < len) 1313 tsiz = 0; 1314 } 1315 nfsmout: 1316 return (error); 1317 } 1318 1319 struct nfs_writerpc_context { 1320 struct simplelock nwc_slock; 1321 volatile int nwc_mbufcount; 1322 }; 1323 1324 /* 1325 * free mbuf used to refer protected pages while write rpc call. 1326 * called at splvm. 1327 */ 1328 static void 1329 nfs_writerpc_extfree(struct mbuf *m, caddr_t tbuf, size_t size, void *arg) 1330 { 1331 struct nfs_writerpc_context *ctx = arg; 1332 1333 KASSERT(m != NULL); 1334 KASSERT(ctx != NULL); 1335 pool_cache_put(&mbpool_cache, m); 1336 simple_lock(&ctx->nwc_slock); 1337 if (--ctx->nwc_mbufcount == 0) { 1338 wakeup(ctx); 1339 } 1340 simple_unlock(&ctx->nwc_slock); 1341 } 1342 1343 /* 1344 * nfs write call 1345 */ 1346 int 1347 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1348 struct vnode *vp; 1349 struct uio *uiop; 1350 int *iomode; 1351 boolean_t pageprotected; 1352 boolean_t *stalewriteverfp; 1353 { 1354 u_int32_t *tl; 1355 caddr_t cp; 1356 int32_t t1, t2; 1357 caddr_t bpos, dpos; 1358 struct mbuf *mreq, *mrep, *md, *mb; 1359 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1360 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1361 const int v3 = NFS_ISV3(vp); 1362 int committed = NFSV3WRITE_FILESYNC; 1363 struct nfsnode *np = VTONFS(vp); 1364 struct nfs_writerpc_context ctx; 1365 int s; 1366 struct lwp *l = NULL; 1367 size_t origresid; 1368 #ifndef NFS_V2_ONLY 1369 caddr_t cp2; 1370 int rlen, commit; 1371 #endif 1372 1373 simple_lock_init(&ctx.nwc_slock); 1374 ctx.nwc_mbufcount = 1; 1375 1376 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1377 panic("writerpc readonly vp %p", vp); 1378 } 1379 1380 #ifdef DIAGNOSTIC 1381 if (uiop->uio_iovcnt != 1) 1382 panic("nfs: writerpc iovcnt > 1"); 1383 #endif 1384 tsiz = uiop->uio_resid; 1385 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1386 return (EFBIG); 1387 if (pageprotected) { 1388 l = curlwp; 1389 PHOLD(l); 1390 } 1391 retry: 1392 origresid = uiop->uio_resid; 1393 KASSERT(origresid == uiop->uio_iov->iov_len); 1394 while (tsiz > 0) { 1395 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1396 uint32_t backup; 1397 boolean_t stalewriteverf = FALSE; 1398 1399 nfsstats.rpccnt[NFSPROC_WRITE]++; 1400 len = min(tsiz, nmp->nm_wsize); 1401 datalen = pageprotected ? 0 : nfsm_rndup(len); 1402 nfsm_reqhead(np, NFSPROC_WRITE, 1403 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1404 nfsm_fhtom(np, v3); 1405 #ifndef NFS_V2_ONLY 1406 if (v3) { 1407 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1408 txdr_hyper(uiop->uio_offset, tl); 1409 tl += 2; 1410 *tl++ = txdr_unsigned(len); 1411 *tl++ = txdr_unsigned(*iomode); 1412 *tl = txdr_unsigned(len); 1413 } else 1414 #endif 1415 { 1416 u_int32_t x; 1417 1418 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1419 /* Set both "begin" and "current" to non-garbage. */ 1420 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1421 *tl++ = x; /* "begin offset" */ 1422 *tl++ = x; /* "current offset" */ 1423 x = txdr_unsigned(len); 1424 *tl++ = x; /* total to this offset */ 1425 *tl = x; /* size of this write */ 1426 1427 } 1428 if (pageprotected) { 1429 /* 1430 * since we know pages can't be modified during i/o, 1431 * no need to copy them for us. 1432 */ 1433 struct mbuf *m; 1434 struct iovec *iovp = uiop->uio_iov; 1435 1436 m = m_get(M_WAIT, MT_DATA); 1437 MCLAIM(m, &nfs_mowner); 1438 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1439 nfs_writerpc_extfree, &ctx); 1440 m->m_flags |= M_EXT_ROMAP; 1441 m->m_len = len; 1442 mb->m_next = m; 1443 /* 1444 * no need to maintain mb and bpos here 1445 * because no one care them later. 1446 */ 1447 #if 0 1448 mb = m; 1449 bpos = mtod(caddr_t, mb) + mb->m_len; 1450 #endif 1451 UIO_ADVANCE(uiop, len); 1452 uiop->uio_offset += len; 1453 s = splvm(); 1454 simple_lock(&ctx.nwc_slock); 1455 ctx.nwc_mbufcount++; 1456 simple_unlock(&ctx.nwc_slock); 1457 splx(s); 1458 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1459 } else { 1460 nfsm_uiotom(uiop, len); 1461 } 1462 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, np->n_wcred); 1463 #ifndef NFS_V2_ONLY 1464 if (v3) { 1465 wccflag = NFSV3_WCCCHK; 1466 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); 1467 if (!error) { 1468 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1469 + NFSX_V3WRITEVERF); 1470 rlen = fxdr_unsigned(int, *tl++); 1471 if (rlen == 0) { 1472 error = NFSERR_IO; 1473 m_freem(mrep); 1474 break; 1475 } else if (rlen < len) { 1476 backup = len - rlen; 1477 UIO_ADVANCE(uiop, -backup); 1478 uiop->uio_offset -= backup; 1479 len = rlen; 1480 } 1481 commit = fxdr_unsigned(int, *tl++); 1482 1483 /* 1484 * Return the lowest committment level 1485 * obtained by any of the RPCs. 1486 */ 1487 if (committed == NFSV3WRITE_FILESYNC) 1488 committed = commit; 1489 else if (committed == NFSV3WRITE_DATASYNC && 1490 commit == NFSV3WRITE_UNSTABLE) 1491 committed = commit; 1492 simple_lock(&nmp->nm_slock); 1493 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1494 memcpy(nmp->nm_writeverf, tl, 1495 NFSX_V3WRITEVERF); 1496 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1497 } else if ((nmp->nm_iflag & 1498 NFSMNT_STALEWRITEVERF) || 1499 memcmp(tl, nmp->nm_writeverf, 1500 NFSX_V3WRITEVERF)) { 1501 memcpy(nmp->nm_writeverf, tl, 1502 NFSX_V3WRITEVERF); 1503 /* 1504 * note NFSMNT_STALEWRITEVERF 1505 * if we're the first thread to 1506 * notice it. 1507 */ 1508 if ((nmp->nm_iflag & 1509 NFSMNT_STALEWRITEVERF) == 0) { 1510 stalewriteverf = TRUE; 1511 nmp->nm_iflag |= 1512 NFSMNT_STALEWRITEVERF; 1513 } 1514 } 1515 simple_unlock(&nmp->nm_slock); 1516 } 1517 } else 1518 #endif 1519 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1520 if (wccflag) 1521 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1522 m_freem(mrep); 1523 if (error) 1524 break; 1525 tsiz -= len; 1526 if (stalewriteverf) { 1527 *stalewriteverfp = TRUE; 1528 stalewriteverf = FALSE; 1529 if (committed == NFSV3WRITE_UNSTABLE && 1530 len != origresid) { 1531 /* 1532 * if our write requests weren't atomic but 1533 * unstable, datas in previous iterations 1534 * might have already been lost now. 1535 * then, we should resend them to nfsd. 1536 */ 1537 backup = origresid - tsiz; 1538 UIO_ADVANCE(uiop, -backup); 1539 uiop->uio_offset -= backup; 1540 tsiz = origresid; 1541 goto retry; 1542 } 1543 } 1544 } 1545 nfsmout: 1546 if (pageprotected) { 1547 /* 1548 * wait until mbufs go away. 1549 * retransmitted mbufs can survive longer than rpc requests 1550 * themselves. 1551 */ 1552 s = splvm(); 1553 simple_lock(&ctx.nwc_slock); 1554 ctx.nwc_mbufcount--; 1555 while (ctx.nwc_mbufcount > 0) { 1556 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1557 } 1558 simple_unlock(&ctx.nwc_slock); 1559 splx(s); 1560 PRELE(l); 1561 } 1562 *iomode = committed; 1563 if (error) 1564 uiop->uio_resid = tsiz; 1565 return (error); 1566 } 1567 1568 /* 1569 * nfs mknod rpc 1570 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1571 * mode set to specify the file type and the size field for rdev. 1572 */ 1573 int 1574 nfs_mknodrpc(dvp, vpp, cnp, vap) 1575 struct vnode *dvp; 1576 struct vnode **vpp; 1577 struct componentname *cnp; 1578 struct vattr *vap; 1579 { 1580 struct nfsv2_sattr *sp; 1581 u_int32_t *tl; 1582 caddr_t cp; 1583 int32_t t1, t2; 1584 struct vnode *newvp = (struct vnode *)0; 1585 struct nfsnode *dnp, *np; 1586 char *cp2; 1587 caddr_t bpos, dpos; 1588 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1589 struct mbuf *mreq, *mrep, *md, *mb; 1590 u_int32_t rdev; 1591 const int v3 = NFS_ISV3(dvp); 1592 1593 if (vap->va_type == VCHR || vap->va_type == VBLK) 1594 rdev = txdr_unsigned(vap->va_rdev); 1595 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1596 rdev = nfs_xdrneg1; 1597 else { 1598 VOP_ABORTOP(dvp, cnp); 1599 vput(dvp); 1600 return (EOPNOTSUPP); 1601 } 1602 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1603 dnp = VTONFS(dvp); 1604 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1605 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1606 nfsm_fhtom(dnp, v3); 1607 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1608 #ifndef NFS_V2_ONLY 1609 if (v3) { 1610 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1611 *tl++ = vtonfsv3_type(vap->va_type); 1612 nfsm_v3attrbuild(vap, FALSE); 1613 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1614 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1615 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1616 *tl = txdr_unsigned(minor(vap->va_rdev)); 1617 } 1618 } else 1619 #endif 1620 { 1621 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1622 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1623 sp->sa_uid = nfs_xdrneg1; 1624 sp->sa_gid = nfs_xdrneg1; 1625 sp->sa_size = rdev; 1626 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1627 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1628 } 1629 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1630 if (!error) { 1631 nfsm_mtofh(dvp, newvp, v3, gotvp); 1632 if (!gotvp) { 1633 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1634 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1635 if (!error) 1636 newvp = NFSTOV(np); 1637 } 1638 } 1639 #ifndef NFS_V2_ONLY 1640 if (v3) 1641 nfsm_wcc_data(dvp, wccflag, 0, !error); 1642 #endif 1643 nfsm_reqdone; 1644 if (error) { 1645 if (newvp) 1646 vput(newvp); 1647 } else { 1648 if (cnp->cn_flags & MAKEENTRY) 1649 nfs_cache_enter(dvp, newvp, cnp); 1650 *vpp = newvp; 1651 } 1652 PNBUF_PUT(cnp->cn_pnbuf); 1653 VTONFS(dvp)->n_flag |= NMODIFIED; 1654 if (!wccflag) 1655 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1656 vput(dvp); 1657 return (error); 1658 } 1659 1660 /* 1661 * nfs mknod vop 1662 * just call nfs_mknodrpc() to do the work. 1663 */ 1664 /* ARGSUSED */ 1665 int 1666 nfs_mknod(v) 1667 void *v; 1668 { 1669 struct vop_mknod_args /* { 1670 struct vnode *a_dvp; 1671 struct vnode **a_vpp; 1672 struct componentname *a_cnp; 1673 struct vattr *a_vap; 1674 } */ *ap = v; 1675 struct vnode *dvp = ap->a_dvp; 1676 struct componentname *cnp = ap->a_cnp; 1677 int error; 1678 1679 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1680 VN_KNOTE(dvp, NOTE_WRITE); 1681 if (error == 0 || error == EEXIST) 1682 cache_purge1(dvp, cnp, 0); 1683 return (error); 1684 } 1685 1686 #ifndef NFS_V2_ONLY 1687 static u_long create_verf; 1688 #endif 1689 /* 1690 * nfs file create call 1691 */ 1692 int 1693 nfs_create(v) 1694 void *v; 1695 { 1696 struct vop_create_args /* { 1697 struct vnode *a_dvp; 1698 struct vnode **a_vpp; 1699 struct componentname *a_cnp; 1700 struct vattr *a_vap; 1701 } */ *ap = v; 1702 struct vnode *dvp = ap->a_dvp; 1703 struct vattr *vap = ap->a_vap; 1704 struct componentname *cnp = ap->a_cnp; 1705 struct nfsv2_sattr *sp; 1706 u_int32_t *tl; 1707 caddr_t cp; 1708 int32_t t1, t2; 1709 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1710 struct vnode *newvp = (struct vnode *)0; 1711 caddr_t bpos, dpos, cp2; 1712 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1713 struct mbuf *mreq, *mrep, *md, *mb; 1714 const int v3 = NFS_ISV3(dvp); 1715 1716 /* 1717 * Oops, not for me.. 1718 */ 1719 if (vap->va_type == VSOCK) 1720 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1721 1722 KASSERT(vap->va_type == VREG); 1723 1724 #ifdef VA_EXCLUSIVE 1725 if (vap->va_vaflags & VA_EXCLUSIVE) 1726 fmode |= O_EXCL; 1727 #endif 1728 again: 1729 error = 0; 1730 nfsstats.rpccnt[NFSPROC_CREATE]++; 1731 dnp = VTONFS(dvp); 1732 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1733 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1734 nfsm_fhtom(dnp, v3); 1735 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1736 #ifndef NFS_V2_ONLY 1737 if (v3) { 1738 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1739 if (fmode & O_EXCL) { 1740 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1741 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1742 #ifdef INET 1743 if (TAILQ_FIRST(&in_ifaddrhead)) 1744 *tl++ = TAILQ_FIRST(&in_ifaddrhead)-> 1745 ia_addr.sin_addr.s_addr; 1746 else 1747 *tl++ = create_verf; 1748 #else 1749 *tl++ = create_verf; 1750 #endif 1751 *tl = ++create_verf; 1752 } else { 1753 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1754 nfsm_v3attrbuild(vap, FALSE); 1755 } 1756 } else 1757 #endif 1758 { 1759 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1760 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1761 sp->sa_uid = nfs_xdrneg1; 1762 sp->sa_gid = nfs_xdrneg1; 1763 sp->sa_size = 0; 1764 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1765 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1766 } 1767 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1768 if (!error) { 1769 nfsm_mtofh(dvp, newvp, v3, gotvp); 1770 if (!gotvp) { 1771 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1772 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1773 if (!error) 1774 newvp = NFSTOV(np); 1775 } 1776 } 1777 #ifndef NFS_V2_ONLY 1778 if (v3) 1779 nfsm_wcc_data(dvp, wccflag, 0, !error); 1780 #endif 1781 nfsm_reqdone; 1782 if (error) { 1783 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1784 fmode &= ~O_EXCL; 1785 goto again; 1786 } 1787 } else if (v3 && (fmode & O_EXCL)) { 1788 struct timeval tm = time; 1789 1790 /* 1791 * make sure that we'll update timestamps as 1792 * most server implementations use them to store 1793 * the create verifier. 1794 * 1795 * XXX it's better to use TOSERVER always. 1796 */ 1797 1798 if (vap->va_atime.tv_sec == VNOVAL) { 1799 vap->va_atime.tv_sec = tm.tv_sec; 1800 vap->va_atime.tv_nsec = tm.tv_usec * 1000; 1801 } 1802 if (vap->va_mtime.tv_sec == VNOVAL) { 1803 vap->va_mtime.tv_sec = tm.tv_sec; 1804 vap->va_mtime.tv_nsec = tm.tv_usec * 1000; 1805 } 1806 1807 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1808 } 1809 if (error == 0) { 1810 if (cnp->cn_flags & MAKEENTRY) 1811 nfs_cache_enter(dvp, newvp, cnp); 1812 else 1813 cache_purge1(dvp, cnp, 0); 1814 *ap->a_vpp = newvp; 1815 } else { 1816 if (newvp) 1817 vput(newvp); 1818 if (error == EEXIST) 1819 cache_purge1(dvp, cnp, 0); 1820 } 1821 PNBUF_PUT(cnp->cn_pnbuf); 1822 VTONFS(dvp)->n_flag |= NMODIFIED; 1823 if (!wccflag) 1824 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1825 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1826 vput(dvp); 1827 return (error); 1828 } 1829 1830 /* 1831 * nfs file remove call 1832 * To try and make nfs semantics closer to ufs semantics, a file that has 1833 * other processes using the vnode is renamed instead of removed and then 1834 * removed later on the last close. 1835 * - If v_usecount > 1 1836 * If a rename is not already in the works 1837 * call nfs_sillyrename() to set it up 1838 * else 1839 * do the remove rpc 1840 */ 1841 int 1842 nfs_remove(v) 1843 void *v; 1844 { 1845 struct vop_remove_args /* { 1846 struct vnodeop_desc *a_desc; 1847 struct vnode * a_dvp; 1848 struct vnode * a_vp; 1849 struct componentname * a_cnp; 1850 } */ *ap = v; 1851 struct vnode *vp = ap->a_vp; 1852 struct vnode *dvp = ap->a_dvp; 1853 struct componentname *cnp = ap->a_cnp; 1854 struct nfsnode *np = VTONFS(vp); 1855 int error = 0; 1856 struct vattr vattr; 1857 1858 #ifndef DIAGNOSTIC 1859 if ((cnp->cn_flags & HASBUF) == 0) 1860 panic("nfs_remove: no name"); 1861 if (vp->v_usecount < 1) 1862 panic("nfs_remove: bad v_usecount"); 1863 #endif 1864 if (vp->v_type == VDIR) 1865 error = EPERM; 1866 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1867 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1868 vattr.va_nlink > 1)) { 1869 /* 1870 * Purge the name cache so that the chance of a lookup for 1871 * the name succeeding while the remove is in progress is 1872 * minimized. Without node locking it can still happen, such 1873 * that an I/O op returns ESTALE, but since you get this if 1874 * another host removes the file.. 1875 */ 1876 cache_purge(vp); 1877 /* 1878 * throw away biocache buffers, mainly to avoid 1879 * unnecessary delayed writes later. 1880 */ 1881 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1882 /* Do the rpc */ 1883 if (error != EINTR) 1884 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1885 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1886 } else if (!np->n_sillyrename) 1887 error = nfs_sillyrename(dvp, vp, cnp); 1888 PNBUF_PUT(cnp->cn_pnbuf); 1889 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1890 vattr.va_nlink == 1) { 1891 np->n_flag |= NREMOVED; 1892 } 1893 NFS_INVALIDATE_ATTRCACHE(np); 1894 VN_KNOTE(vp, NOTE_DELETE); 1895 VN_KNOTE(dvp, NOTE_WRITE); 1896 if (dvp == vp) 1897 vrele(vp); 1898 else 1899 vput(vp); 1900 vput(dvp); 1901 return (error); 1902 } 1903 1904 /* 1905 * nfs file remove rpc called from nfs_inactive 1906 */ 1907 int 1908 nfs_removeit(sp) 1909 struct sillyrename *sp; 1910 { 1911 1912 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1913 (struct proc *)0)); 1914 } 1915 1916 /* 1917 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1918 */ 1919 int 1920 nfs_removerpc(dvp, name, namelen, cred, proc) 1921 struct vnode *dvp; 1922 const char *name; 1923 int namelen; 1924 struct ucred *cred; 1925 struct proc *proc; 1926 { 1927 u_int32_t *tl; 1928 caddr_t cp; 1929 #ifndef NFS_V2_ONLY 1930 int32_t t1; 1931 caddr_t cp2; 1932 #endif 1933 int32_t t2; 1934 caddr_t bpos, dpos; 1935 int error = 0, wccflag = NFSV3_WCCRATTR; 1936 struct mbuf *mreq, *mrep, *md, *mb; 1937 const int v3 = NFS_ISV3(dvp); 1938 int rexmit; 1939 struct nfsnode *dnp = VTONFS(dvp); 1940 1941 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1942 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1943 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1944 nfsm_fhtom(dnp, v3); 1945 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1946 nfsm_request1(dnp, NFSPROC_REMOVE, proc, cred, &rexmit); 1947 #ifndef NFS_V2_ONLY 1948 if (v3) 1949 nfsm_wcc_data(dvp, wccflag, 0, !error); 1950 #endif 1951 nfsm_reqdone; 1952 VTONFS(dvp)->n_flag |= NMODIFIED; 1953 if (!wccflag) 1954 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1955 /* 1956 * Kludge City: If the first reply to the remove rpc is lost.. 1957 * the reply to the retransmitted request will be ENOENT 1958 * since the file was in fact removed 1959 * Therefore, we cheat and return success. 1960 */ 1961 if (rexmit && error == ENOENT) 1962 error = 0; 1963 return (error); 1964 } 1965 1966 /* 1967 * nfs file rename call 1968 */ 1969 int 1970 nfs_rename(v) 1971 void *v; 1972 { 1973 struct vop_rename_args /* { 1974 struct vnode *a_fdvp; 1975 struct vnode *a_fvp; 1976 struct componentname *a_fcnp; 1977 struct vnode *a_tdvp; 1978 struct vnode *a_tvp; 1979 struct componentname *a_tcnp; 1980 } */ *ap = v; 1981 struct vnode *fvp = ap->a_fvp; 1982 struct vnode *tvp = ap->a_tvp; 1983 struct vnode *fdvp = ap->a_fdvp; 1984 struct vnode *tdvp = ap->a_tdvp; 1985 struct componentname *tcnp = ap->a_tcnp; 1986 struct componentname *fcnp = ap->a_fcnp; 1987 int error; 1988 1989 #ifndef DIAGNOSTIC 1990 if ((tcnp->cn_flags & HASBUF) == 0 || 1991 (fcnp->cn_flags & HASBUF) == 0) 1992 panic("nfs_rename: no name"); 1993 #endif 1994 /* Check for cross-device rename */ 1995 if ((fvp->v_mount != tdvp->v_mount) || 1996 (tvp && (fvp->v_mount != tvp->v_mount))) { 1997 error = EXDEV; 1998 goto out; 1999 } 2000 2001 /* 2002 * If the tvp exists and is in use, sillyrename it before doing the 2003 * rename of the new file over it. 2004 */ 2005 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 2006 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 2007 VN_KNOTE(tvp, NOTE_DELETE); 2008 vput(tvp); 2009 tvp = NULL; 2010 } 2011 2012 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2013 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 2014 tcnp->cn_proc); 2015 2016 VN_KNOTE(fdvp, NOTE_WRITE); 2017 VN_KNOTE(tdvp, NOTE_WRITE); 2018 if (error == 0 || error == EEXIST) { 2019 if (fvp->v_type == VDIR) 2020 cache_purge(fvp); 2021 else 2022 cache_purge1(fdvp, fcnp, 0); 2023 if (tvp != NULL && tvp->v_type == VDIR) 2024 cache_purge(tvp); 2025 else 2026 cache_purge1(tdvp, tcnp, 0); 2027 } 2028 out: 2029 if (tdvp == tvp) 2030 vrele(tdvp); 2031 else 2032 vput(tdvp); 2033 if (tvp) 2034 vput(tvp); 2035 vrele(fdvp); 2036 vrele(fvp); 2037 return (error); 2038 } 2039 2040 /* 2041 * nfs file rename rpc called from nfs_remove() above 2042 */ 2043 int 2044 nfs_renameit(sdvp, scnp, sp) 2045 struct vnode *sdvp; 2046 struct componentname *scnp; 2047 struct sillyrename *sp; 2048 { 2049 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2050 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 2051 } 2052 2053 /* 2054 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2055 */ 2056 int 2057 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 2058 struct vnode *fdvp; 2059 const char *fnameptr; 2060 int fnamelen; 2061 struct vnode *tdvp; 2062 const char *tnameptr; 2063 int tnamelen; 2064 struct ucred *cred; 2065 struct proc *proc; 2066 { 2067 u_int32_t *tl; 2068 caddr_t cp; 2069 #ifndef NFS_V2_ONLY 2070 int32_t t1; 2071 caddr_t cp2; 2072 #endif 2073 int32_t t2; 2074 caddr_t bpos, dpos; 2075 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2076 struct mbuf *mreq, *mrep, *md, *mb; 2077 const int v3 = NFS_ISV3(fdvp); 2078 int rexmit; 2079 struct nfsnode *fdnp = VTONFS(fdvp); 2080 2081 nfsstats.rpccnt[NFSPROC_RENAME]++; 2082 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2083 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2084 nfsm_rndup(tnamelen)); 2085 nfsm_fhtom(fdnp, v3); 2086 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2087 nfsm_fhtom(VTONFS(tdvp), v3); 2088 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2089 nfsm_request1(fdnp, NFSPROC_RENAME, proc, cred, &rexmit); 2090 #ifndef NFS_V2_ONLY 2091 if (v3) { 2092 nfsm_wcc_data(fdvp, fwccflag, 0, !error); 2093 nfsm_wcc_data(tdvp, twccflag, 0, !error); 2094 } 2095 #endif 2096 nfsm_reqdone; 2097 VTONFS(fdvp)->n_flag |= NMODIFIED; 2098 VTONFS(tdvp)->n_flag |= NMODIFIED; 2099 if (!fwccflag) 2100 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2101 if (!twccflag) 2102 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2103 /* 2104 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2105 */ 2106 if (rexmit && error == ENOENT) 2107 error = 0; 2108 return (error); 2109 } 2110 2111 /* 2112 * nfs hard link create call 2113 */ 2114 int 2115 nfs_link(v) 2116 void *v; 2117 { 2118 struct vop_link_args /* { 2119 struct vnode *a_dvp; 2120 struct vnode *a_vp; 2121 struct componentname *a_cnp; 2122 } */ *ap = v; 2123 struct vnode *vp = ap->a_vp; 2124 struct vnode *dvp = ap->a_dvp; 2125 struct componentname *cnp = ap->a_cnp; 2126 u_int32_t *tl; 2127 caddr_t cp; 2128 #ifndef NFS_V2_ONLY 2129 int32_t t1; 2130 caddr_t cp2; 2131 #endif 2132 int32_t t2; 2133 caddr_t bpos, dpos; 2134 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2135 struct mbuf *mreq, *mrep, *md, *mb; 2136 /* XXX Should be const and initialised? */ 2137 int v3; 2138 int rexmit; 2139 struct nfsnode *np; 2140 2141 if (dvp->v_mount != vp->v_mount) { 2142 VOP_ABORTOP(dvp, cnp); 2143 vput(dvp); 2144 return (EXDEV); 2145 } 2146 if (dvp != vp) { 2147 error = vn_lock(vp, LK_EXCLUSIVE); 2148 if (error != 0) { 2149 VOP_ABORTOP(dvp, cnp); 2150 vput(dvp); 2151 return error; 2152 } 2153 } 2154 2155 /* 2156 * Push all writes to the server, so that the attribute cache 2157 * doesn't get "out of sync" with the server. 2158 * XXX There should be a better way! 2159 */ 2160 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 2161 2162 v3 = NFS_ISV3(vp); 2163 nfsstats.rpccnt[NFSPROC_LINK]++; 2164 np = VTONFS(vp); 2165 nfsm_reqhead(np, NFSPROC_LINK, 2166 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2167 nfsm_fhtom(np, v3); 2168 nfsm_fhtom(VTONFS(dvp), v3); 2169 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2170 nfsm_request1(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred, &rexmit); 2171 #ifndef NFS_V2_ONLY 2172 if (v3) { 2173 nfsm_postop_attr(vp, attrflag, 0); 2174 nfsm_wcc_data(dvp, wccflag, 0, !error); 2175 } 2176 #endif 2177 nfsm_reqdone; 2178 if (error == 0 || error == EEXIST) 2179 cache_purge1(dvp, cnp, 0); 2180 PNBUF_PUT(cnp->cn_pnbuf); 2181 VTONFS(dvp)->n_flag |= NMODIFIED; 2182 if (!attrflag) 2183 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2184 if (!wccflag) 2185 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2186 if (dvp != vp) 2187 VOP_UNLOCK(vp, 0); 2188 VN_KNOTE(vp, NOTE_LINK); 2189 VN_KNOTE(dvp, NOTE_WRITE); 2190 vput(dvp); 2191 /* 2192 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2193 */ 2194 if (rexmit && error == EEXIST) 2195 error = 0; 2196 return (error); 2197 } 2198 2199 /* 2200 * nfs symbolic link create call 2201 */ 2202 int 2203 nfs_symlink(v) 2204 void *v; 2205 { 2206 struct vop_symlink_args /* { 2207 struct vnode *a_dvp; 2208 struct vnode **a_vpp; 2209 struct componentname *a_cnp; 2210 struct vattr *a_vap; 2211 char *a_target; 2212 } */ *ap = v; 2213 struct vnode *dvp = ap->a_dvp; 2214 struct vattr *vap = ap->a_vap; 2215 struct componentname *cnp = ap->a_cnp; 2216 struct nfsv2_sattr *sp; 2217 u_int32_t *tl; 2218 caddr_t cp; 2219 int32_t t1, t2; 2220 caddr_t bpos, dpos, cp2; 2221 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2222 struct mbuf *mreq, *mrep, *md, *mb; 2223 struct vnode *newvp = (struct vnode *)0; 2224 const int v3 = NFS_ISV3(dvp); 2225 int rexmit; 2226 struct nfsnode *dnp = VTONFS(dvp); 2227 2228 *ap->a_vpp = NULL; 2229 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2230 slen = strlen(ap->a_target); 2231 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2232 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2233 nfsm_fhtom(dnp, v3); 2234 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2235 #ifndef NFS_V2_ONlY 2236 if (v3) 2237 nfsm_v3attrbuild(vap, FALSE); 2238 #endif 2239 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2240 #ifndef NFS_V2_ONlY 2241 if (!v3) { 2242 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2243 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2244 sp->sa_uid = nfs_xdrneg1; 2245 sp->sa_gid = nfs_xdrneg1; 2246 sp->sa_size = nfs_xdrneg1; 2247 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2248 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2249 } 2250 #endif 2251 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred, 2252 &rexmit); 2253 #ifndef NFS_V2_ONlY 2254 if (v3) { 2255 if (!error) 2256 nfsm_mtofh(dvp, newvp, v3, gotvp); 2257 nfsm_wcc_data(dvp, wccflag, 0, !error); 2258 } 2259 #endif 2260 nfsm_reqdone; 2261 /* 2262 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2263 */ 2264 if (rexmit && error == EEXIST) 2265 error = 0; 2266 if (error == 0 || error == EEXIST) 2267 cache_purge1(dvp, cnp, 0); 2268 if (error == 0 && newvp == NULL) { 2269 struct nfsnode *np = NULL; 2270 2271 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2272 cnp->cn_cred, cnp->cn_proc, &np); 2273 if (error == 0) 2274 newvp = NFSTOV(np); 2275 } 2276 if (error) { 2277 if (newvp != NULL) 2278 vput(newvp); 2279 } else { 2280 *ap->a_vpp = newvp; 2281 } 2282 PNBUF_PUT(cnp->cn_pnbuf); 2283 VTONFS(dvp)->n_flag |= NMODIFIED; 2284 if (!wccflag) 2285 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2286 VN_KNOTE(dvp, NOTE_WRITE); 2287 vput(dvp); 2288 return (error); 2289 } 2290 2291 /* 2292 * nfs make dir call 2293 */ 2294 int 2295 nfs_mkdir(v) 2296 void *v; 2297 { 2298 struct vop_mkdir_args /* { 2299 struct vnode *a_dvp; 2300 struct vnode **a_vpp; 2301 struct componentname *a_cnp; 2302 struct vattr *a_vap; 2303 } */ *ap = v; 2304 struct vnode *dvp = ap->a_dvp; 2305 struct vattr *vap = ap->a_vap; 2306 struct componentname *cnp = ap->a_cnp; 2307 struct nfsv2_sattr *sp; 2308 u_int32_t *tl; 2309 caddr_t cp; 2310 int32_t t1, t2; 2311 int len; 2312 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2313 struct vnode *newvp = (struct vnode *)0; 2314 caddr_t bpos, dpos, cp2; 2315 int error = 0, wccflag = NFSV3_WCCRATTR; 2316 int gotvp = 0; 2317 int rexmit; 2318 struct mbuf *mreq, *mrep, *md, *mb; 2319 const int v3 = NFS_ISV3(dvp); 2320 2321 len = cnp->cn_namelen; 2322 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2323 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2324 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2325 nfsm_fhtom(dnp, v3); 2326 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2327 #ifndef NFS_V2_ONLY 2328 if (v3) { 2329 nfsm_v3attrbuild(vap, FALSE); 2330 } else 2331 #endif 2332 { 2333 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2334 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2335 sp->sa_uid = nfs_xdrneg1; 2336 sp->sa_gid = nfs_xdrneg1; 2337 sp->sa_size = nfs_xdrneg1; 2338 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2339 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2340 } 2341 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2342 if (!error) 2343 nfsm_mtofh(dvp, newvp, v3, gotvp); 2344 if (v3) 2345 nfsm_wcc_data(dvp, wccflag, 0, !error); 2346 nfsm_reqdone; 2347 VTONFS(dvp)->n_flag |= NMODIFIED; 2348 if (!wccflag) 2349 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2350 /* 2351 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2352 * if we can succeed in looking up the directory. 2353 */ 2354 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2355 if (newvp) { 2356 vput(newvp); 2357 newvp = (struct vnode *)0; 2358 } 2359 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2360 cnp->cn_proc, &np); 2361 if (!error) { 2362 newvp = NFSTOV(np); 2363 if (newvp->v_type != VDIR || newvp == dvp) 2364 error = EEXIST; 2365 } 2366 } 2367 if (error) { 2368 if (newvp) { 2369 if (dvp != newvp) 2370 vput(newvp); 2371 else 2372 vrele(newvp); 2373 } 2374 } else { 2375 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2376 if (cnp->cn_flags & MAKEENTRY) 2377 nfs_cache_enter(dvp, newvp, cnp); 2378 *ap->a_vpp = newvp; 2379 } 2380 PNBUF_PUT(cnp->cn_pnbuf); 2381 vput(dvp); 2382 return (error); 2383 } 2384 2385 /* 2386 * nfs remove directory call 2387 */ 2388 int 2389 nfs_rmdir(v) 2390 void *v; 2391 { 2392 struct vop_rmdir_args /* { 2393 struct vnode *a_dvp; 2394 struct vnode *a_vp; 2395 struct componentname *a_cnp; 2396 } */ *ap = v; 2397 struct vnode *vp = ap->a_vp; 2398 struct vnode *dvp = ap->a_dvp; 2399 struct componentname *cnp = ap->a_cnp; 2400 u_int32_t *tl; 2401 caddr_t cp; 2402 #ifndef NFS_V2_ONLY 2403 int32_t t1; 2404 caddr_t cp2; 2405 #endif 2406 int32_t t2; 2407 caddr_t bpos, dpos; 2408 int error = 0, wccflag = NFSV3_WCCRATTR; 2409 int rexmit; 2410 struct mbuf *mreq, *mrep, *md, *mb; 2411 const int v3 = NFS_ISV3(dvp); 2412 struct nfsnode *dnp; 2413 2414 if (dvp == vp) { 2415 vrele(dvp); 2416 vput(dvp); 2417 PNBUF_PUT(cnp->cn_pnbuf); 2418 return (EINVAL); 2419 } 2420 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2421 dnp = VTONFS(dvp); 2422 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2423 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2424 nfsm_fhtom(dnp, v3); 2425 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2426 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2427 #ifndef NFS_V2_ONLY 2428 if (v3) 2429 nfsm_wcc_data(dvp, wccflag, 0, !error); 2430 #endif 2431 nfsm_reqdone; 2432 PNBUF_PUT(cnp->cn_pnbuf); 2433 VTONFS(dvp)->n_flag |= NMODIFIED; 2434 if (!wccflag) 2435 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2436 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2437 VN_KNOTE(vp, NOTE_DELETE); 2438 cache_purge(vp); 2439 vput(vp); 2440 vput(dvp); 2441 /* 2442 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2443 */ 2444 if (rexmit && error == ENOENT) 2445 error = 0; 2446 return (error); 2447 } 2448 2449 /* 2450 * nfs readdir call 2451 */ 2452 int 2453 nfs_readdir(v) 2454 void *v; 2455 { 2456 struct vop_readdir_args /* { 2457 struct vnode *a_vp; 2458 struct uio *a_uio; 2459 struct ucred *a_cred; 2460 int *a_eofflag; 2461 off_t **a_cookies; 2462 int *a_ncookies; 2463 } */ *ap = v; 2464 struct vnode *vp = ap->a_vp; 2465 struct uio *uio = ap->a_uio; 2466 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2467 char *base = uio->uio_iov->iov_base; 2468 int tresid, error; 2469 size_t count, lost; 2470 struct dirent *dp; 2471 off_t *cookies = NULL; 2472 int ncookies = 0, nc; 2473 2474 if (vp->v_type != VDIR) 2475 return (EPERM); 2476 2477 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2478 count = uio->uio_resid - lost; 2479 if (count <= 0) 2480 return (EINVAL); 2481 2482 /* 2483 * Call nfs_bioread() to do the real work. 2484 */ 2485 tresid = uio->uio_resid = count; 2486 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2487 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2488 2489 if (!error && ap->a_cookies) { 2490 ncookies = count / 16; 2491 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2492 *ap->a_cookies = cookies; 2493 } 2494 2495 if (!error && uio->uio_resid == tresid) { 2496 uio->uio_resid += lost; 2497 nfsstats.direofcache_misses++; 2498 if (ap->a_cookies) 2499 *ap->a_ncookies = 0; 2500 *ap->a_eofflag = 1; 2501 return (0); 2502 } 2503 2504 if (!error && ap->a_cookies) { 2505 /* 2506 * Only the NFS server and emulations use cookies, and they 2507 * load the directory block into system space, so we can 2508 * just look at it directly. 2509 */ 2510 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2511 panic("nfs_readdir: lost in space"); 2512 for (nc = 0; ncookies-- && 2513 base < (char *)uio->uio_iov->iov_base; nc++){ 2514 dp = (struct dirent *) base; 2515 if (dp->d_reclen == 0) 2516 break; 2517 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2518 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2519 else 2520 *(cookies++) = NFS_GETCOOKIE(dp); 2521 base += dp->d_reclen; 2522 } 2523 uio->uio_resid += 2524 ((caddr_t)uio->uio_iov->iov_base - base); 2525 uio->uio_iov->iov_len += 2526 ((caddr_t)uio->uio_iov->iov_base - base); 2527 uio->uio_iov->iov_base = base; 2528 *ap->a_ncookies = nc; 2529 } 2530 2531 uio->uio_resid += lost; 2532 *ap->a_eofflag = 0; 2533 return (error); 2534 } 2535 2536 /* 2537 * Readdir rpc call. 2538 * Called from below the buffer cache by nfs_doio(). 2539 */ 2540 int 2541 nfs_readdirrpc(vp, uiop, cred) 2542 struct vnode *vp; 2543 struct uio *uiop; 2544 struct ucred *cred; 2545 { 2546 int len, left; 2547 struct dirent *dp = NULL; 2548 u_int32_t *tl; 2549 caddr_t cp; 2550 int32_t t1, t2; 2551 caddr_t bpos, dpos, cp2; 2552 struct mbuf *mreq, *mrep, *md, *mb; 2553 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2554 struct nfsnode *dnp = VTONFS(vp); 2555 u_quad_t fileno; 2556 int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; 2557 #ifndef NFS_V2_ONLY 2558 int attrflag; 2559 #endif 2560 int nrpcs = 0, reclen; 2561 const int v3 = NFS_ISV3(vp); 2562 2563 #ifdef DIAGNOSTIC 2564 /* 2565 * Should be called from buffer cache, so only amount of 2566 * NFS_DIRBLKSIZ will be requested. 2567 */ 2568 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2569 panic("nfs readdirrpc bad uio"); 2570 #endif 2571 2572 /* 2573 * Loop around doing readdir rpc's of size nm_readdirsize 2574 * truncated to a multiple of NFS_DIRFRAGSIZ. 2575 * The stopping criteria is EOF or buffer full. 2576 */ 2577 while (more_dirs && bigenough) { 2578 /* 2579 * Heuristic: don't bother to do another RPC to further 2580 * fill up this block if there is not much room left. (< 50% 2581 * of the readdir RPC size). This wastes some buffer space 2582 * but can save up to 50% in RPC calls. 2583 */ 2584 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2585 bigenough = 0; 2586 break; 2587 } 2588 nfsstats.rpccnt[NFSPROC_READDIR]++; 2589 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2590 NFSX_READDIR(v3)); 2591 nfsm_fhtom(dnp, v3); 2592 #ifndef NFS_V2_ONLY 2593 if (v3) { 2594 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2595 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2596 txdr_swapcookie3(uiop->uio_offset, tl); 2597 } else { 2598 txdr_cookie3(uiop->uio_offset, tl); 2599 } 2600 tl += 2; 2601 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2602 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2603 } else 2604 #endif 2605 { 2606 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2607 *tl++ = txdr_unsigned(uiop->uio_offset); 2608 } 2609 *tl = txdr_unsigned(nmp->nm_readdirsize); 2610 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2611 nrpcs++; 2612 #ifndef NFS_V2_ONLY 2613 if (v3) { 2614 nfsm_postop_attr(vp, attrflag, 0); 2615 if (!error) { 2616 nfsm_dissect(tl, u_int32_t *, 2617 2 * NFSX_UNSIGNED); 2618 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2619 dnp->n_cookieverf.nfsuquad[1] = *tl; 2620 } else { 2621 m_freem(mrep); 2622 goto nfsmout; 2623 } 2624 } 2625 #endif 2626 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2627 more_dirs = fxdr_unsigned(int, *tl); 2628 2629 /* loop thru the dir entries, doctoring them to 4bsd form */ 2630 while (more_dirs && bigenough) { 2631 #ifndef NFS_V2_ONLY 2632 if (v3) { 2633 nfsm_dissect(tl, u_int32_t *, 2634 3 * NFSX_UNSIGNED); 2635 fileno = fxdr_hyper(tl); 2636 len = fxdr_unsigned(int, *(tl + 2)); 2637 } else 2638 #endif 2639 { 2640 nfsm_dissect(tl, u_int32_t *, 2641 2 * NFSX_UNSIGNED); 2642 fileno = fxdr_unsigned(u_quad_t, *tl++); 2643 len = fxdr_unsigned(int, *tl); 2644 } 2645 if (len <= 0 || len > NFS_MAXNAMLEN) { 2646 error = EBADRPC; 2647 m_freem(mrep); 2648 goto nfsmout; 2649 } 2650 /* for cookie stashing */ 2651 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2652 left = NFS_DIRFRAGSIZ - blksiz; 2653 if (reclen > left) { 2654 memset(uiop->uio_iov->iov_base, 0, left); 2655 dp->d_reclen += left; 2656 UIO_ADVANCE(uiop, left); 2657 blksiz = 0; 2658 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2659 } 2660 if (reclen > uiop->uio_resid) 2661 bigenough = 0; 2662 if (bigenough) { 2663 int tlen; 2664 2665 dp = (struct dirent *)uiop->uio_iov->iov_base; 2666 dp->d_fileno = fileno; 2667 dp->d_namlen = len; 2668 dp->d_reclen = reclen; 2669 dp->d_type = DT_UNKNOWN; 2670 blksiz += reclen; 2671 if (blksiz == NFS_DIRFRAGSIZ) 2672 blksiz = 0; 2673 UIO_ADVANCE(uiop, DIRHDSIZ); 2674 nfsm_mtouio(uiop, len); 2675 tlen = reclen - (DIRHDSIZ + len); 2676 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2677 UIO_ADVANCE(uiop, tlen); 2678 } else 2679 nfsm_adv(nfsm_rndup(len)); 2680 #ifndef NFS_V2_ONLY 2681 if (v3) { 2682 nfsm_dissect(tl, u_int32_t *, 2683 3 * NFSX_UNSIGNED); 2684 } else 2685 #endif 2686 { 2687 nfsm_dissect(tl, u_int32_t *, 2688 2 * NFSX_UNSIGNED); 2689 } 2690 if (bigenough) { 2691 #ifndef NFS_V2_ONLY 2692 if (v3) { 2693 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2694 uiop->uio_offset = 2695 fxdr_swapcookie3(tl); 2696 else 2697 uiop->uio_offset = 2698 fxdr_cookie3(tl); 2699 } 2700 else 2701 #endif 2702 { 2703 uiop->uio_offset = 2704 fxdr_unsigned(off_t, *tl); 2705 } 2706 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2707 } 2708 if (v3) 2709 tl += 2; 2710 else 2711 tl++; 2712 more_dirs = fxdr_unsigned(int, *tl); 2713 } 2714 /* 2715 * If at end of rpc data, get the eof boolean 2716 */ 2717 if (!more_dirs) { 2718 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2719 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2720 2721 /* 2722 * kludge: if we got no entries, treat it as EOF. 2723 * some server sometimes send a reply without any 2724 * entries or EOF. 2725 * although it might mean the server has very long name, 2726 * we can't handle such entries anyway. 2727 */ 2728 2729 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2730 more_dirs = 0; 2731 } 2732 m_freem(mrep); 2733 } 2734 /* 2735 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2736 * by increasing d_reclen for the last record. 2737 */ 2738 if (blksiz > 0) { 2739 left = NFS_DIRFRAGSIZ - blksiz; 2740 memset(uiop->uio_iov->iov_base, 0, left); 2741 dp->d_reclen += left; 2742 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2743 UIO_ADVANCE(uiop, left); 2744 } 2745 2746 /* 2747 * We are now either at the end of the directory or have filled the 2748 * block. 2749 */ 2750 if (bigenough) { 2751 dnp->n_direofoffset = uiop->uio_offset; 2752 dnp->n_flag |= NEOFVALID; 2753 } 2754 nfsmout: 2755 return (error); 2756 } 2757 2758 #ifndef NFS_V2_ONLY 2759 /* 2760 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2761 */ 2762 int 2763 nfs_readdirplusrpc(vp, uiop, cred) 2764 struct vnode *vp; 2765 struct uio *uiop; 2766 struct ucred *cred; 2767 { 2768 int len, left; 2769 struct dirent *dp = NULL; 2770 u_int32_t *tl; 2771 caddr_t cp; 2772 int32_t t1, t2; 2773 struct vnode *newvp; 2774 caddr_t bpos, dpos, cp2; 2775 struct mbuf *mreq, *mrep, *md, *mb; 2776 struct nameidata nami, *ndp = &nami; 2777 struct componentname *cnp = &ndp->ni_cnd; 2778 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2779 struct nfsnode *dnp = VTONFS(vp), *np; 2780 nfsfh_t *fhp; 2781 u_quad_t fileno; 2782 int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2783 int attrflag, fhsize, nrpcs = 0, reclen; 2784 struct nfs_fattr fattr, *fp; 2785 2786 #ifdef DIAGNOSTIC 2787 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2788 panic("nfs readdirplusrpc bad uio"); 2789 #endif 2790 ndp->ni_dvp = vp; 2791 newvp = NULLVP; 2792 2793 /* 2794 * Loop around doing readdir rpc's of size nm_readdirsize 2795 * truncated to a multiple of NFS_DIRFRAGSIZ. 2796 * The stopping criteria is EOF or buffer full. 2797 */ 2798 while (more_dirs && bigenough) { 2799 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2800 bigenough = 0; 2801 break; 2802 } 2803 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2804 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2805 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2806 nfsm_fhtom(dnp, 1); 2807 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2808 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2809 txdr_swapcookie3(uiop->uio_offset, tl); 2810 } else { 2811 txdr_cookie3(uiop->uio_offset, tl); 2812 } 2813 tl += 2; 2814 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2815 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2816 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2817 *tl = txdr_unsigned(nmp->nm_rsize); 2818 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2819 nfsm_postop_attr(vp, attrflag, 0); 2820 if (error) { 2821 m_freem(mrep); 2822 goto nfsmout; 2823 } 2824 nrpcs++; 2825 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2826 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2827 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2828 more_dirs = fxdr_unsigned(int, *tl); 2829 2830 /* loop thru the dir entries, doctoring them to 4bsd form */ 2831 while (more_dirs && bigenough) { 2832 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2833 fileno = fxdr_hyper(tl); 2834 len = fxdr_unsigned(int, *(tl + 2)); 2835 if (len <= 0 || len > NFS_MAXNAMLEN) { 2836 error = EBADRPC; 2837 m_freem(mrep); 2838 goto nfsmout; 2839 } 2840 /* for cookie stashing */ 2841 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2842 left = NFS_DIRFRAGSIZ - blksiz; 2843 if (reclen > left) { 2844 /* 2845 * DIRFRAGSIZ is aligned, no need to align 2846 * again here. 2847 */ 2848 memset(uiop->uio_iov->iov_base, 0, left); 2849 dp->d_reclen += left; 2850 UIO_ADVANCE(uiop, left); 2851 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2852 blksiz = 0; 2853 } 2854 if (reclen > uiop->uio_resid) 2855 bigenough = 0; 2856 if (bigenough) { 2857 int tlen; 2858 2859 dp = (struct dirent *)uiop->uio_iov->iov_base; 2860 dp->d_fileno = fileno; 2861 dp->d_namlen = len; 2862 dp->d_reclen = reclen; 2863 dp->d_type = DT_UNKNOWN; 2864 blksiz += reclen; 2865 if (blksiz == NFS_DIRFRAGSIZ) 2866 blksiz = 0; 2867 UIO_ADVANCE(uiop, DIRHDSIZ); 2868 nfsm_mtouio(uiop, len); 2869 tlen = reclen - (DIRHDSIZ + len); 2870 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2871 UIO_ADVANCE(uiop, tlen); 2872 cnp->cn_nameptr = dp->d_name; 2873 cnp->cn_namelen = dp->d_namlen; 2874 } else 2875 nfsm_adv(nfsm_rndup(len)); 2876 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2877 if (bigenough) { 2878 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2879 uiop->uio_offset = 2880 fxdr_swapcookie3(tl); 2881 else 2882 uiop->uio_offset = 2883 fxdr_cookie3(tl); 2884 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2885 } 2886 tl += 2; 2887 2888 /* 2889 * Since the attributes are before the file handle 2890 * (sigh), we must skip over the attributes and then 2891 * come back and get them. 2892 */ 2893 attrflag = fxdr_unsigned(int, *tl); 2894 if (attrflag) { 2895 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2896 memcpy(&fattr, fp, NFSX_V3FATTR); 2897 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2898 doit = fxdr_unsigned(int, *tl); 2899 if (doit) { 2900 nfsm_getfh(fhp, fhsize, 1); 2901 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2902 VREF(vp); 2903 newvp = vp; 2904 np = dnp; 2905 } else { 2906 error = nfs_nget1(vp->v_mount, fhp, 2907 fhsize, &np, LK_NOWAIT); 2908 if (!error) 2909 newvp = NFSTOV(np); 2910 } 2911 if (!error) { 2912 const char *xcp; 2913 2914 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2915 if (bigenough) { 2916 dp->d_type = 2917 IFTODT(VTTOIF(np->n_vattr->va_type)); 2918 if (cnp->cn_namelen <= NCHNAMLEN) { 2919 ndp->ni_vp = newvp; 2920 xcp = cnp->cn_nameptr + 2921 cnp->cn_namelen; 2922 cnp->cn_hash = 2923 namei_hash(cnp->cn_nameptr, &xcp); 2924 nfs_cache_enter(ndp->ni_dvp, 2925 ndp->ni_vp, cnp); 2926 } 2927 } 2928 } 2929 error = 0; 2930 } 2931 } else { 2932 /* Just skip over the file handle */ 2933 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2934 i = fxdr_unsigned(int, *tl); 2935 nfsm_adv(nfsm_rndup(i)); 2936 } 2937 if (newvp != NULLVP) { 2938 if (newvp == vp) 2939 vrele(newvp); 2940 else 2941 vput(newvp); 2942 newvp = NULLVP; 2943 } 2944 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2945 more_dirs = fxdr_unsigned(int, *tl); 2946 } 2947 /* 2948 * If at end of rpc data, get the eof boolean 2949 */ 2950 if (!more_dirs) { 2951 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2952 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2953 2954 /* 2955 * kludge: see a comment in nfs_readdirrpc. 2956 */ 2957 2958 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2959 more_dirs = 0; 2960 } 2961 m_freem(mrep); 2962 } 2963 /* 2964 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2965 * by increasing d_reclen for the last record. 2966 */ 2967 if (blksiz > 0) { 2968 left = NFS_DIRFRAGSIZ - blksiz; 2969 memset(uiop->uio_iov->iov_base, 0, left); 2970 dp->d_reclen += left; 2971 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2972 UIO_ADVANCE(uiop, left); 2973 } 2974 2975 /* 2976 * We are now either at the end of the directory or have filled the 2977 * block. 2978 */ 2979 if (bigenough) { 2980 dnp->n_direofoffset = uiop->uio_offset; 2981 dnp->n_flag |= NEOFVALID; 2982 } 2983 nfsmout: 2984 if (newvp != NULLVP) { 2985 if(newvp == vp) 2986 vrele(newvp); 2987 else 2988 vput(newvp); 2989 } 2990 return (error); 2991 } 2992 #endif 2993 2994 /* 2995 * Silly rename. To make the NFS filesystem that is stateless look a little 2996 * more like the "ufs" a remove of an active vnode is translated to a rename 2997 * to a funny looking filename that is removed by nfs_inactive on the 2998 * nfsnode. There is the potential for another process on a different client 2999 * to create the same funny name between the nfs_lookitup() fails and the 3000 * nfs_rename() completes, but... 3001 */ 3002 int 3003 nfs_sillyrename(dvp, vp, cnp) 3004 struct vnode *dvp, *vp; 3005 struct componentname *cnp; 3006 { 3007 struct sillyrename *sp; 3008 struct nfsnode *np; 3009 int error; 3010 short pid; 3011 3012 cache_purge(dvp); 3013 np = VTONFS(vp); 3014 #ifndef DIAGNOSTIC 3015 if (vp->v_type == VDIR) 3016 panic("nfs: sillyrename dir"); 3017 #endif 3018 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 3019 M_NFSREQ, M_WAITOK); 3020 sp->s_cred = crdup(cnp->cn_cred); 3021 sp->s_dvp = dvp; 3022 VREF(dvp); 3023 3024 /* Fudge together a funny name */ 3025 pid = cnp->cn_proc->p_pid; 3026 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3027 sp->s_namlen = 12; 3028 sp->s_name[8] = hexdigits[pid & 0xf]; 3029 sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; 3030 sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; 3031 sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; 3032 3033 /* Try lookitups until we get one that isn't there */ 3034 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3035 cnp->cn_proc, (struct nfsnode **)0) == 0) { 3036 sp->s_name[4]++; 3037 if (sp->s_name[4] > 'z') { 3038 error = EINVAL; 3039 goto bad; 3040 } 3041 } 3042 error = nfs_renameit(dvp, cnp, sp); 3043 if (error) 3044 goto bad; 3045 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3046 cnp->cn_proc, &np); 3047 np->n_sillyrename = sp; 3048 return (0); 3049 bad: 3050 vrele(sp->s_dvp); 3051 crfree(sp->s_cred); 3052 free((caddr_t)sp, M_NFSREQ); 3053 return (error); 3054 } 3055 3056 /* 3057 * Look up a file name and optionally either update the file handle or 3058 * allocate an nfsnode, depending on the value of npp. 3059 * npp == NULL --> just do the lookup 3060 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3061 * handled too 3062 * *npp != NULL --> update the file handle in the vnode 3063 */ 3064 int 3065 nfs_lookitup(dvp, name, len, cred, procp, npp) 3066 struct vnode *dvp; 3067 const char *name; 3068 int len; 3069 struct ucred *cred; 3070 struct proc *procp; 3071 struct nfsnode **npp; 3072 { 3073 u_int32_t *tl; 3074 caddr_t cp; 3075 int32_t t1, t2; 3076 struct vnode *newvp = (struct vnode *)0; 3077 struct nfsnode *np, *dnp = VTONFS(dvp); 3078 caddr_t bpos, dpos, cp2; 3079 int error = 0, fhlen; 3080 #ifndef NFS_V2_ONLY 3081 int attrflag; 3082 #endif 3083 struct mbuf *mreq, *mrep, *md, *mb; 3084 nfsfh_t *nfhp; 3085 const int v3 = NFS_ISV3(dvp); 3086 3087 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3088 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3089 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3090 nfsm_fhtom(dnp, v3); 3091 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3092 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 3093 if (npp && !error) { 3094 nfsm_getfh(nfhp, fhlen, v3); 3095 if (*npp) { 3096 np = *npp; 3097 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3098 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3099 np->n_fhp = &np->n_fh; 3100 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3101 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3102 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3103 np->n_fhsize = fhlen; 3104 newvp = NFSTOV(np); 3105 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3106 VREF(dvp); 3107 newvp = dvp; 3108 np = dnp; 3109 } else { 3110 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3111 if (error) { 3112 m_freem(mrep); 3113 return (error); 3114 } 3115 newvp = NFSTOV(np); 3116 } 3117 #ifndef NFS_V2_ONLY 3118 if (v3) { 3119 nfsm_postop_attr(newvp, attrflag, 0); 3120 if (!attrflag && *npp == NULL) { 3121 m_freem(mrep); 3122 vput(newvp); 3123 return (ENOENT); 3124 } 3125 } else 3126 #endif 3127 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3128 } 3129 nfsm_reqdone; 3130 if (npp && *npp == NULL) { 3131 if (error) { 3132 if (newvp) 3133 vput(newvp); 3134 } else 3135 *npp = np; 3136 } 3137 return (error); 3138 } 3139 3140 #ifndef NFS_V2_ONLY 3141 /* 3142 * Nfs Version 3 commit rpc 3143 */ 3144 int 3145 nfs_commit(vp, offset, cnt, procp) 3146 struct vnode *vp; 3147 off_t offset; 3148 uint32_t cnt; 3149 struct proc *procp; 3150 { 3151 caddr_t cp; 3152 u_int32_t *tl; 3153 int32_t t1, t2; 3154 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3155 caddr_t bpos, dpos, cp2; 3156 int error = 0, wccflag = NFSV3_WCCRATTR; 3157 struct mbuf *mreq, *mrep, *md, *mb; 3158 struct nfsnode *np; 3159 3160 KASSERT(NFS_ISV3(vp)); 3161 3162 #ifdef NFS_DEBUG_COMMIT 3163 printf("commit %lu - %lu\n", (unsigned long)offset, 3164 (unsigned long)(offset + cnt)); 3165 #endif 3166 3167 simple_lock(&nmp->nm_slock); 3168 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3169 simple_unlock(&nmp->nm_slock); 3170 return (0); 3171 } 3172 simple_unlock(&nmp->nm_slock); 3173 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3174 np = VTONFS(vp); 3175 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3176 nfsm_fhtom(np, 1); 3177 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3178 txdr_hyper(offset, tl); 3179 tl += 2; 3180 *tl = txdr_unsigned(cnt); 3181 nfsm_request(np, NFSPROC_COMMIT, procp, np->n_wcred); 3182 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, FALSE); 3183 if (!error) { 3184 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3185 simple_lock(&nmp->nm_slock); 3186 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3187 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3188 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3189 error = NFSERR_STALEWRITEVERF; 3190 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3191 } 3192 simple_unlock(&nmp->nm_slock); 3193 } 3194 nfsm_reqdone; 3195 return (error); 3196 } 3197 #endif 3198 3199 /* 3200 * Kludge City.. 3201 * - make nfs_bmap() essentially a no-op that does no translation 3202 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3203 * (Maybe I could use the process's page mapping, but I was concerned that 3204 * Kernel Write might not be enabled and also figured copyout() would do 3205 * a lot more work than memcpy() and also it currently happens in the 3206 * context of the swapper process (2). 3207 */ 3208 int 3209 nfs_bmap(v) 3210 void *v; 3211 { 3212 struct vop_bmap_args /* { 3213 struct vnode *a_vp; 3214 daddr_t a_bn; 3215 struct vnode **a_vpp; 3216 daddr_t *a_bnp; 3217 int *a_runp; 3218 } */ *ap = v; 3219 struct vnode *vp = ap->a_vp; 3220 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3221 3222 if (ap->a_vpp != NULL) 3223 *ap->a_vpp = vp; 3224 if (ap->a_bnp != NULL) 3225 *ap->a_bnp = ap->a_bn << bshift; 3226 if (ap->a_runp != NULL) 3227 *ap->a_runp = 1024 * 1024; /* XXX */ 3228 return (0); 3229 } 3230 3231 /* 3232 * Strategy routine. 3233 * For async requests when nfsiod(s) are running, queue the request by 3234 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3235 * request. 3236 */ 3237 int 3238 nfs_strategy(v) 3239 void *v; 3240 { 3241 struct vop_strategy_args *ap = v; 3242 struct buf *bp = ap->a_bp; 3243 int error = 0; 3244 3245 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3246 panic("nfs physio/async"); 3247 3248 /* 3249 * If the op is asynchronous and an i/o daemon is waiting 3250 * queue the request, wake it up and wait for completion 3251 * otherwise just do it ourselves. 3252 */ 3253 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) 3254 error = nfs_doio(bp); 3255 return (error); 3256 } 3257 3258 /* 3259 * fsync vnode op. Just call nfs_flush() with commit == 1. 3260 */ 3261 /* ARGSUSED */ 3262 int 3263 nfs_fsync(v) 3264 void *v; 3265 { 3266 struct vop_fsync_args /* { 3267 struct vnodeop_desc *a_desc; 3268 struct vnode * a_vp; 3269 struct ucred * a_cred; 3270 int a_flags; 3271 off_t offlo; 3272 off_t offhi; 3273 struct proc * a_p; 3274 } */ *ap = v; 3275 3276 struct vnode *vp = ap->a_vp; 3277 3278 if (vp->v_type != VREG) 3279 return 0; 3280 3281 return (nfs_flush(vp, ap->a_cred, 3282 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3283 } 3284 3285 /* 3286 * Flush all the data associated with a vnode. 3287 */ 3288 int 3289 nfs_flush(vp, cred, waitfor, p, commit) 3290 struct vnode *vp; 3291 struct ucred *cred; 3292 int waitfor; 3293 struct proc *p; 3294 int commit; 3295 { 3296 struct nfsnode *np = VTONFS(vp); 3297 int error; 3298 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3299 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3300 3301 simple_lock(&vp->v_interlock); 3302 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3303 if (np->n_flag & NWRITEERR) { 3304 error = np->n_error; 3305 np->n_flag &= ~NWRITEERR; 3306 } 3307 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3308 return (error); 3309 } 3310 3311 /* 3312 * Return POSIX pathconf information applicable to nfs. 3313 * 3314 * N.B. The NFS V2 protocol doesn't support this RPC. 3315 */ 3316 /* ARGSUSED */ 3317 int 3318 nfs_pathconf(v) 3319 void *v; 3320 { 3321 struct vop_pathconf_args /* { 3322 struct vnode *a_vp; 3323 int a_name; 3324 register_t *a_retval; 3325 } */ *ap = v; 3326 struct nfsv3_pathconf *pcp; 3327 struct vnode *vp = ap->a_vp; 3328 struct mbuf *mreq, *mrep, *md, *mb; 3329 int32_t t1, t2; 3330 u_int32_t *tl; 3331 caddr_t bpos, dpos, cp, cp2; 3332 int error = 0, attrflag; 3333 #ifndef NFS_V2_ONLY 3334 struct nfsmount *nmp; 3335 unsigned int l; 3336 u_int64_t maxsize; 3337 #endif 3338 const int v3 = NFS_ISV3(vp); 3339 struct nfsnode *np = VTONFS(vp); 3340 3341 switch (ap->a_name) { 3342 /* Names that can be resolved locally. */ 3343 case _PC_PIPE_BUF: 3344 *ap->a_retval = PIPE_BUF; 3345 break; 3346 case _PC_SYNC_IO: 3347 *ap->a_retval = 1; 3348 break; 3349 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3350 case _PC_LINK_MAX: 3351 case _PC_NAME_MAX: 3352 case _PC_CHOWN_RESTRICTED: 3353 case _PC_NO_TRUNC: 3354 if (!v3) { 3355 error = EINVAL; 3356 break; 3357 } 3358 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3359 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3360 nfsm_fhtom(np, 1); 3361 nfsm_request(np, NFSPROC_PATHCONF, 3362 curproc, curproc->p_ucred); /* XXX */ 3363 nfsm_postop_attr(vp, attrflag, 0); 3364 if (!error) { 3365 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3366 NFSX_V3PATHCONF); 3367 switch (ap->a_name) { 3368 case _PC_LINK_MAX: 3369 *ap->a_retval = 3370 fxdr_unsigned(register_t, pcp->pc_linkmax); 3371 break; 3372 case _PC_NAME_MAX: 3373 *ap->a_retval = 3374 fxdr_unsigned(register_t, pcp->pc_namemax); 3375 break; 3376 case _PC_CHOWN_RESTRICTED: 3377 *ap->a_retval = 3378 (pcp->pc_chownrestricted == nfs_true); 3379 break; 3380 case _PC_NO_TRUNC: 3381 *ap->a_retval = 3382 (pcp->pc_notrunc == nfs_true); 3383 break; 3384 } 3385 } 3386 nfsm_reqdone; 3387 break; 3388 case _PC_FILESIZEBITS: 3389 #ifndef NFS_V2_ONLY 3390 if (v3) { 3391 nmp = VFSTONFS(vp->v_mount); 3392 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3393 if ((error = nfs_fsinfo(nmp, vp, 3394 curproc->p_ucred, curproc)) != 0) /* XXX */ 3395 break; 3396 for (l = 0, maxsize = nmp->nm_maxfilesize; 3397 (maxsize >> l) > 0; l++) 3398 ; 3399 *ap->a_retval = l + 1; 3400 } else 3401 #endif 3402 { 3403 *ap->a_retval = 32; /* NFS V2 limitation */ 3404 } 3405 break; 3406 default: 3407 error = EINVAL; 3408 break; 3409 } 3410 3411 return (error); 3412 } 3413 3414 /* 3415 * NFS advisory byte-level locks. 3416 */ 3417 int 3418 nfs_advlock(v) 3419 void *v; 3420 { 3421 struct vop_advlock_args /* { 3422 struct vnode *a_vp; 3423 caddr_t a_id; 3424 int a_op; 3425 struct flock *a_fl; 3426 int a_flags; 3427 } */ *ap = v; 3428 struct nfsnode *np = VTONFS(ap->a_vp); 3429 3430 return lf_advlock(ap, &np->n_lockf, np->n_size); 3431 } 3432 3433 /* 3434 * Print out the contents of an nfsnode. 3435 */ 3436 int 3437 nfs_print(v) 3438 void *v; 3439 { 3440 struct vop_print_args /* { 3441 struct vnode *a_vp; 3442 } */ *ap = v; 3443 struct vnode *vp = ap->a_vp; 3444 struct nfsnode *np = VTONFS(vp); 3445 3446 printf("tag VT_NFS, fileid %lld fsid 0x%lx", 3447 (unsigned long long)np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3448 if (vp->v_type == VFIFO) 3449 fifo_printinfo(vp); 3450 printf("\n"); 3451 return (0); 3452 } 3453 3454 /* 3455 * nfs unlock wrapper. 3456 */ 3457 int 3458 nfs_unlock(void *v) 3459 { 3460 struct vop_unlock_args /* { 3461 struct vnode *a_vp; 3462 int a_flags; 3463 } */ *ap = v; 3464 struct vnode *vp = ap->a_vp; 3465 3466 /* 3467 * VOP_UNLOCK can be called by nfs_loadattrcache 3468 * with v_data == 0. 3469 */ 3470 if (VTONFS(vp)) { 3471 nfs_delayedtruncate(vp); 3472 } 3473 3474 return genfs_unlock(v); 3475 } 3476 3477 /* 3478 * nfs special file access vnode op. 3479 * Essentially just get vattr and then imitate iaccess() since the device is 3480 * local to the client. 3481 */ 3482 int 3483 nfsspec_access(v) 3484 void *v; 3485 { 3486 struct vop_access_args /* { 3487 struct vnode *a_vp; 3488 int a_mode; 3489 struct ucred *a_cred; 3490 struct proc *a_p; 3491 } */ *ap = v; 3492 struct vattr va; 3493 struct vnode *vp = ap->a_vp; 3494 int error; 3495 3496 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3497 if (error) 3498 return (error); 3499 3500 /* 3501 * Disallow write attempts on filesystems mounted read-only; 3502 * unless the file is a socket, fifo, or a block or character 3503 * device resident on the filesystem. 3504 */ 3505 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3506 switch (vp->v_type) { 3507 case VREG: 3508 case VDIR: 3509 case VLNK: 3510 return (EROFS); 3511 default: 3512 break; 3513 } 3514 } 3515 3516 return (vaccess(va.va_type, va.va_mode, 3517 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3518 } 3519 3520 /* 3521 * Read wrapper for special devices. 3522 */ 3523 int 3524 nfsspec_read(v) 3525 void *v; 3526 { 3527 struct vop_read_args /* { 3528 struct vnode *a_vp; 3529 struct uio *a_uio; 3530 int a_ioflag; 3531 struct ucred *a_cred; 3532 } */ *ap = v; 3533 struct nfsnode *np = VTONFS(ap->a_vp); 3534 3535 /* 3536 * Set access flag. 3537 */ 3538 np->n_flag |= NACC; 3539 np->n_atim.tv_sec = time.tv_sec; 3540 np->n_atim.tv_nsec = time.tv_usec * 1000; 3541 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3542 } 3543 3544 /* 3545 * Write wrapper for special devices. 3546 */ 3547 int 3548 nfsspec_write(v) 3549 void *v; 3550 { 3551 struct vop_write_args /* { 3552 struct vnode *a_vp; 3553 struct uio *a_uio; 3554 int a_ioflag; 3555 struct ucred *a_cred; 3556 } */ *ap = v; 3557 struct nfsnode *np = VTONFS(ap->a_vp); 3558 3559 /* 3560 * Set update flag. 3561 */ 3562 np->n_flag |= NUPD; 3563 np->n_mtim.tv_sec = time.tv_sec; 3564 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3565 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3566 } 3567 3568 /* 3569 * Close wrapper for special devices. 3570 * 3571 * Update the times on the nfsnode then do device close. 3572 */ 3573 int 3574 nfsspec_close(v) 3575 void *v; 3576 { 3577 struct vop_close_args /* { 3578 struct vnode *a_vp; 3579 int a_fflag; 3580 struct ucred *a_cred; 3581 struct proc *a_p; 3582 } */ *ap = v; 3583 struct vnode *vp = ap->a_vp; 3584 struct nfsnode *np = VTONFS(vp); 3585 struct vattr vattr; 3586 3587 if (np->n_flag & (NACC | NUPD)) { 3588 np->n_flag |= NCHG; 3589 if (vp->v_usecount == 1 && 3590 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3591 VATTR_NULL(&vattr); 3592 if (np->n_flag & NACC) 3593 vattr.va_atime = np->n_atim; 3594 if (np->n_flag & NUPD) 3595 vattr.va_mtime = np->n_mtim; 3596 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3597 } 3598 } 3599 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3600 } 3601 3602 /* 3603 * Read wrapper for fifos. 3604 */ 3605 int 3606 nfsfifo_read(v) 3607 void *v; 3608 { 3609 struct vop_read_args /* { 3610 struct vnode *a_vp; 3611 struct uio *a_uio; 3612 int a_ioflag; 3613 struct ucred *a_cred; 3614 } */ *ap = v; 3615 struct nfsnode *np = VTONFS(ap->a_vp); 3616 3617 /* 3618 * Set access flag. 3619 */ 3620 np->n_flag |= NACC; 3621 np->n_atim.tv_sec = time.tv_sec; 3622 np->n_atim.tv_nsec = time.tv_usec * 1000; 3623 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3624 } 3625 3626 /* 3627 * Write wrapper for fifos. 3628 */ 3629 int 3630 nfsfifo_write(v) 3631 void *v; 3632 { 3633 struct vop_write_args /* { 3634 struct vnode *a_vp; 3635 struct uio *a_uio; 3636 int a_ioflag; 3637 struct ucred *a_cred; 3638 } */ *ap = v; 3639 struct nfsnode *np = VTONFS(ap->a_vp); 3640 3641 /* 3642 * Set update flag. 3643 */ 3644 np->n_flag |= NUPD; 3645 np->n_mtim.tv_sec = time.tv_sec; 3646 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3647 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3648 } 3649 3650 /* 3651 * Close wrapper for fifos. 3652 * 3653 * Update the times on the nfsnode then do fifo close. 3654 */ 3655 int 3656 nfsfifo_close(v) 3657 void *v; 3658 { 3659 struct vop_close_args /* { 3660 struct vnode *a_vp; 3661 int a_fflag; 3662 struct ucred *a_cred; 3663 struct proc *a_p; 3664 } */ *ap = v; 3665 struct vnode *vp = ap->a_vp; 3666 struct nfsnode *np = VTONFS(vp); 3667 struct vattr vattr; 3668 3669 if (np->n_flag & (NACC | NUPD)) { 3670 if (np->n_flag & NACC) { 3671 np->n_atim.tv_sec = time.tv_sec; 3672 np->n_atim.tv_nsec = time.tv_usec * 1000; 3673 } 3674 if (np->n_flag & NUPD) { 3675 np->n_mtim.tv_sec = time.tv_sec; 3676 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3677 } 3678 np->n_flag |= NCHG; 3679 if (vp->v_usecount == 1 && 3680 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3681 VATTR_NULL(&vattr); 3682 if (np->n_flag & NACC) 3683 vattr.va_atime = np->n_atim; 3684 if (np->n_flag & NUPD) 3685 vattr.va_mtime = np->n_mtim; 3686 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3687 } 3688 } 3689 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3690 } 3691
Indexes created Thu Sep 25 16:09:42 GMT 2025