nfs_vnops.c revision 1.213
1 /* $NetBSD: nfs_vnops.c,v 1.213 2004/12/14 09:15:23 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. 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 1.213 2004/12/14 09:15:23 yamt 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, genfs_badop }, /* 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 (sizeof (struct dirent) - (MAXNAMLEN + 1)) 266 267 static void nfs_cache_enter(struct vnode *, struct vnode *, 268 struct componentname *); 269 270 static void 271 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 272 struct componentname *cnp) 273 { 274 275 if (vp != NULL) { 276 struct nfsnode *np = VTONFS(vp); 277 278 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 279 } else { 280 struct nfsnode *dnp = VTONFS(dvp); 281 282 if (!timespecisset(&dnp->n_nctime)) 283 dnp->n_nctime = dnp->n_vattr->va_mtime; 284 } 285 286 cache_enter(dvp, vp, cnp); 287 } 288 289 /* 290 * nfs null call from vfs. 291 */ 292 int 293 nfs_null(vp, cred, procp) 294 struct vnode *vp; 295 struct ucred *cred; 296 struct proc *procp; 297 { 298 caddr_t bpos, dpos; 299 int error = 0; 300 struct mbuf *mreq, *mrep, *md, *mb; 301 struct nfsnode *np = VTONFS(vp); 302 303 nfsm_reqhead(np, NFSPROC_NULL, 0); 304 nfsm_request(np, NFSPROC_NULL, procp, cred); 305 nfsm_reqdone; 306 return (error); 307 } 308 309 /* 310 * nfs access vnode op. 311 * For nfs version 2, just return ok. File accesses may fail later. 312 * For nfs version 3, use the access rpc to check accessibility. If file modes 313 * are changed on the server, accesses might still fail later. 314 */ 315 int 316 nfs_access(v) 317 void *v; 318 { 319 struct vop_access_args /* { 320 struct vnode *a_vp; 321 int a_mode; 322 struct ucred *a_cred; 323 struct proc *a_p; 324 } */ *ap = v; 325 struct vnode *vp = ap->a_vp; 326 #ifndef NFS_V2_ONLY 327 u_int32_t *tl; 328 caddr_t cp; 329 int32_t t1, t2; 330 caddr_t bpos, dpos, cp2; 331 int error = 0, attrflag; 332 struct mbuf *mreq, *mrep, *md, *mb; 333 u_int32_t mode, rmode; 334 const int v3 = NFS_ISV3(vp); 335 #endif 336 int cachevalid; 337 struct nfsnode *np = VTONFS(vp); 338 339 cachevalid = (np->n_accstamp != -1 && 340 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 341 np->n_accuid == ap->a_cred->cr_uid); 342 343 /* 344 * Check access cache first. If this request has been made for this 345 * uid shortly before, use the cached result. 346 */ 347 if (cachevalid) { 348 if (!np->n_accerror) { 349 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 350 return np->n_accerror; 351 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 352 return np->n_accerror; 353 } 354 355 #ifndef NFS_V2_ONLY 356 /* 357 * For nfs v3, do an access rpc, otherwise you are stuck emulating 358 * ufs_access() locally using the vattr. This may not be correct, 359 * since the server may apply other access criteria such as 360 * client uid-->server uid mapping that we do not know about, but 361 * this is better than just returning anything that is lying about 362 * in the cache. 363 */ 364 if (v3) { 365 nfsstats.rpccnt[NFSPROC_ACCESS]++; 366 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 367 nfsm_fhtom(np, v3); 368 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 369 if (ap->a_mode & VREAD) 370 mode = NFSV3ACCESS_READ; 371 else 372 mode = 0; 373 if (vp->v_type != VDIR) { 374 if (ap->a_mode & VWRITE) 375 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 376 if (ap->a_mode & VEXEC) 377 mode |= NFSV3ACCESS_EXECUTE; 378 } else { 379 if (ap->a_mode & VWRITE) 380 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 381 NFSV3ACCESS_DELETE); 382 if (ap->a_mode & VEXEC) 383 mode |= NFSV3ACCESS_LOOKUP; 384 } 385 *tl = txdr_unsigned(mode); 386 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 387 nfsm_postop_attr(vp, attrflag, 0); 388 if (!error) { 389 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 390 rmode = fxdr_unsigned(u_int32_t, *tl); 391 /* 392 * The NFS V3 spec does not clarify whether or not 393 * the returned access bits can be a superset of 394 * the ones requested, so... 395 */ 396 if ((rmode & mode) != mode) 397 error = EACCES; 398 } 399 nfsm_reqdone; 400 } else 401 #endif 402 return (nfsspec_access(ap)); 403 #ifndef NFS_V2_ONLY 404 /* 405 * Disallow write attempts on filesystems mounted read-only; 406 * unless the file is a socket, fifo, or a block or character 407 * device resident on the filesystem. 408 */ 409 if (!error && (ap->a_mode & VWRITE) && 410 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 411 switch (vp->v_type) { 412 case VREG: 413 case VDIR: 414 case VLNK: 415 error = EROFS; 416 default: 417 break; 418 } 419 } 420 421 if (!error || error == EACCES) { 422 /* 423 * If we got the same result as for a previous, 424 * different request, OR it in. Don't update 425 * the timestamp in that case. 426 */ 427 if (cachevalid && np->n_accstamp != -1 && 428 error == np->n_accerror) { 429 if (!error) 430 np->n_accmode |= ap->a_mode; 431 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 432 np->n_accmode = ap->a_mode; 433 } else { 434 np->n_accstamp = time.tv_sec; 435 np->n_accuid = ap->a_cred->cr_uid; 436 np->n_accmode = ap->a_mode; 437 np->n_accerror = error; 438 } 439 } 440 441 return (error); 442 #endif 443 } 444 445 /* 446 * nfs open vnode op 447 * Check to see if the type is ok 448 * and that deletion is not in progress. 449 * For paged in text files, you will need to flush the page cache 450 * if consistency is lost. 451 */ 452 /* ARGSUSED */ 453 int 454 nfs_open(v) 455 void *v; 456 { 457 struct vop_open_args /* { 458 struct vnode *a_vp; 459 int a_mode; 460 struct ucred *a_cred; 461 struct proc *a_p; 462 } */ *ap = v; 463 struct vnode *vp = ap->a_vp; 464 struct nfsnode *np = VTONFS(vp); 465 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 466 int error; 467 468 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 469 return (EACCES); 470 } 471 472 if (ap->a_mode & FREAD) { 473 if (np->n_rcred != NULL) 474 crfree(np->n_rcred); 475 np->n_rcred = ap->a_cred; 476 crhold(np->n_rcred); 477 } 478 if (ap->a_mode & FWRITE) { 479 if (np->n_wcred != NULL) 480 crfree(np->n_wcred); 481 np->n_wcred = ap->a_cred; 482 crhold(np->n_wcred); 483 } 484 485 #ifndef NFS_V2_ONLY 486 /* 487 * Get a valid lease. If cached data is stale, flush it. 488 */ 489 if (nmp->nm_flag & NFSMNT_NQNFS) { 490 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 491 do { 492 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 493 ap->a_p); 494 } while (error == NQNFS_EXPIRED); 495 if (error) 496 return (error); 497 if (np->n_lrev != np->n_brev || 498 (np->n_flag & NQNFSNONCACHE)) { 499 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 500 ap->a_p, 1)) == EINTR) 501 return (error); 502 np->n_brev = np->n_lrev; 503 } 504 } 505 } else 506 #endif 507 { 508 error = nfs_flushstalebuf(vp, ap->a_cred, ap->a_p, 0); 509 if (error) 510 return error; 511 } 512 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 513 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 514 return (0); 515 } 516 517 /* 518 * nfs close vnode op 519 * What an NFS client should do upon close after writing is a debatable issue. 520 * Most NFS clients push delayed writes to the server upon close, basically for 521 * two reasons: 522 * 1 - So that any write errors may be reported back to the client process 523 * doing the close system call. By far the two most likely errors are 524 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 525 * 2 - To put a worst case upper bound on cache inconsistency between 526 * multiple clients for the file. 527 * There is also a consistency problem for Version 2 of the protocol w.r.t. 528 * not being able to tell if other clients are writing a file concurrently, 529 * since there is no way of knowing if the changed modify time in the reply 530 * is only due to the write for this client. 531 * (NFS Version 3 provides weak cache consistency data in the reply that 532 * should be sufficient to detect and handle this case.) 533 * 534 * The current code does the following: 535 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 536 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 537 * or commit them (this satisfies 1 and 2 except for the 538 * case where the server crashes after this close but 539 * before the commit RPC, which is felt to be "good 540 * enough". Changing the last argument to nfs_flush() to 541 * a 1 would force a commit operation, if it is felt a 542 * commit is necessary now. 543 * for NQNFS - do nothing now, since 2 is dealt with via leases and 544 * 1 should be dealt with via an fsync() system call for 545 * cases where write errors are important. 546 */ 547 /* ARGSUSED */ 548 int 549 nfs_close(v) 550 void *v; 551 { 552 struct vop_close_args /* { 553 struct vnodeop_desc *a_desc; 554 struct vnode *a_vp; 555 int a_fflag; 556 struct ucred *a_cred; 557 struct proc *a_p; 558 } */ *ap = v; 559 struct vnode *vp = ap->a_vp; 560 struct nfsnode *np = VTONFS(vp); 561 int error = 0; 562 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 563 564 if (vp->v_type == VREG) { 565 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 566 (np->n_flag & NMODIFIED)) { 567 #ifndef NFS_V2_ONLY 568 if (NFS_ISV3(vp)) { 569 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 570 np->n_flag &= ~NMODIFIED; 571 } else 572 #endif 573 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 574 NFS_INVALIDATE_ATTRCACHE(np); 575 } 576 if (np->n_flag & NWRITEERR) { 577 np->n_flag &= ~NWRITEERR; 578 error = np->n_error; 579 } 580 } 581 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 582 return (error); 583 } 584 585 /* 586 * nfs getattr call from vfs. 587 */ 588 int 589 nfs_getattr(v) 590 void *v; 591 { 592 struct vop_getattr_args /* { 593 struct vnode *a_vp; 594 struct vattr *a_vap; 595 struct ucred *a_cred; 596 struct proc *a_p; 597 } */ *ap = v; 598 struct vnode *vp = ap->a_vp; 599 struct nfsnode *np = VTONFS(vp); 600 caddr_t cp; 601 u_int32_t *tl; 602 int32_t t1, t2; 603 caddr_t bpos, dpos; 604 int error = 0; 605 struct mbuf *mreq, *mrep, *md, *mb; 606 const int v3 = NFS_ISV3(vp); 607 608 /* 609 * Update local times for special files. 610 */ 611 if (np->n_flag & (NACC | NUPD)) 612 np->n_flag |= NCHG; 613 614 /* 615 * if we have delayed truncation, do it now. 616 */ 617 nfs_delayedtruncate(vp); 618 619 /* 620 * First look in the cache. 621 */ 622 if (nfs_getattrcache(vp, ap->a_vap) == 0) 623 return (0); 624 nfsstats.rpccnt[NFSPROC_GETATTR]++; 625 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 626 nfsm_fhtom(np, v3); 627 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 628 if (!error) { 629 nfsm_loadattr(vp, ap->a_vap, 0); 630 if (vp->v_type == VDIR && 631 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 632 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 633 } 634 nfsm_reqdone; 635 return (error); 636 } 637 638 /* 639 * nfs setattr call. 640 */ 641 int 642 nfs_setattr(v) 643 void *v; 644 { 645 struct vop_setattr_args /* { 646 struct vnodeop_desc *a_desc; 647 struct vnode *a_vp; 648 struct vattr *a_vap; 649 struct ucred *a_cred; 650 struct proc *a_p; 651 } */ *ap = v; 652 struct vnode *vp = ap->a_vp; 653 struct nfsnode *np = VTONFS(vp); 654 struct vattr *vap = ap->a_vap; 655 int error = 0; 656 u_quad_t tsize = 0; 657 658 /* 659 * Setting of flags is not supported. 660 */ 661 if (vap->va_flags != VNOVAL) 662 return (EOPNOTSUPP); 663 664 /* 665 * Disallow write attempts if the filesystem is mounted read-only. 666 */ 667 if ((vap->va_uid != (uid_t)VNOVAL || 668 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 669 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 670 (vp->v_mount->mnt_flag & MNT_RDONLY)) 671 return (EROFS); 672 if (vap->va_size != VNOVAL) { 673 switch (vp->v_type) { 674 case VDIR: 675 return (EISDIR); 676 case VCHR: 677 case VBLK: 678 case VSOCK: 679 case VFIFO: 680 if (vap->va_mtime.tv_sec == VNOVAL && 681 vap->va_atime.tv_sec == VNOVAL && 682 vap->va_mode == (mode_t)VNOVAL && 683 vap->va_uid == (uid_t)VNOVAL && 684 vap->va_gid == (gid_t)VNOVAL) 685 return (0); 686 vap->va_size = VNOVAL; 687 break; 688 default: 689 /* 690 * Disallow write attempts if the filesystem is 691 * mounted read-only. 692 */ 693 if (vp->v_mount->mnt_flag & MNT_RDONLY) 694 return (EROFS); 695 uvm_vnp_setsize(vp, vap->va_size); 696 tsize = np->n_size; 697 np->n_size = vap->va_size; 698 if (vap->va_size == 0) 699 error = nfs_vinvalbuf(vp, 0, 700 ap->a_cred, ap->a_p, 1); 701 else 702 error = nfs_vinvalbuf(vp, V_SAVE, 703 ap->a_cred, ap->a_p, 1); 704 if (error) { 705 uvm_vnp_setsize(vp, tsize); 706 return (error); 707 } 708 np->n_vattr->va_size = vap->va_size; 709 } 710 } else if ((vap->va_mtime.tv_sec != VNOVAL || 711 vap->va_atime.tv_sec != VNOVAL) && 712 vp->v_type == VREG && 713 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 714 ap->a_p, 1)) == EINTR) 715 return (error); 716 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 717 if (error && vap->va_size != VNOVAL) { 718 np->n_size = np->n_vattr->va_size = tsize; 719 uvm_vnp_setsize(vp, np->n_size); 720 } 721 VN_KNOTE(vp, NOTE_ATTRIB); 722 return (error); 723 } 724 725 /* 726 * Do an nfs setattr rpc. 727 */ 728 int 729 nfs_setattrrpc(vp, vap, cred, procp) 730 struct vnode *vp; 731 struct vattr *vap; 732 struct ucred *cred; 733 struct proc *procp; 734 { 735 struct nfsv2_sattr *sp; 736 caddr_t cp; 737 int32_t t1, t2; 738 caddr_t bpos, dpos; 739 u_int32_t *tl; 740 int error = 0; 741 struct mbuf *mreq, *mrep, *md, *mb; 742 const int v3 = NFS_ISV3(vp); 743 struct nfsnode *np = VTONFS(vp); 744 #ifndef NFS_V2_ONLY 745 int wccflag = NFSV3_WCCRATTR; 746 caddr_t cp2; 747 #endif 748 749 nfsstats.rpccnt[NFSPROC_SETATTR]++; 750 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 751 nfsm_fhtom(np, v3); 752 #ifndef NFS_V2_ONLY 753 if (v3) { 754 nfsm_v3attrbuild(vap, TRUE); 755 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 756 *tl = nfs_false; 757 } else { 758 #endif 759 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 760 if (vap->va_mode == (mode_t)VNOVAL) 761 sp->sa_mode = nfs_xdrneg1; 762 else 763 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 764 if (vap->va_uid == (uid_t)VNOVAL) 765 sp->sa_uid = nfs_xdrneg1; 766 else 767 sp->sa_uid = txdr_unsigned(vap->va_uid); 768 if (vap->va_gid == (gid_t)VNOVAL) 769 sp->sa_gid = nfs_xdrneg1; 770 else 771 sp->sa_gid = txdr_unsigned(vap->va_gid); 772 sp->sa_size = txdr_unsigned(vap->va_size); 773 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 774 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 775 #ifndef NFS_V2_ONLY 776 } 777 #endif 778 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 779 #ifndef NFS_V2_ONLY 780 if (v3) { 781 nfsm_wcc_data(vp, wccflag, 0); 782 } else 783 #endif 784 nfsm_loadattr(vp, (struct vattr *)0, 0); 785 nfsm_reqdone; 786 return (error); 787 } 788 789 /* 790 * nfs lookup call, one step at a time... 791 * First look in cache 792 * If not found, unlock the directory nfsnode and do the rpc 793 * 794 * This code is full of lock/unlock statements and checks, because 795 * we continue after cache_lookup has finished (we need to check 796 * with the attr cache and do an rpc if it has timed out). This means 797 * that the locking effects of cache_lookup have to be taken into 798 * account. 799 */ 800 int 801 nfs_lookup(v) 802 void *v; 803 { 804 struct vop_lookup_args /* { 805 struct vnodeop_desc *a_desc; 806 struct vnode *a_dvp; 807 struct vnode **a_vpp; 808 struct componentname *a_cnp; 809 } */ *ap = v; 810 struct componentname *cnp = ap->a_cnp; 811 struct vnode *dvp = ap->a_dvp; 812 struct vnode **vpp = ap->a_vpp; 813 int flags; 814 struct vnode *newvp; 815 u_int32_t *tl; 816 caddr_t cp; 817 int32_t t1, t2; 818 caddr_t bpos, dpos, cp2; 819 struct mbuf *mreq, *mrep, *md, *mb; 820 long len; 821 nfsfh_t *fhp; 822 struct nfsnode *np; 823 int lockparent, wantparent, error = 0, attrflag, fhsize; 824 const int v3 = NFS_ISV3(dvp); 825 826 cnp->cn_flags &= ~PDIRUNLOCK; 827 flags = cnp->cn_flags; 828 829 *vpp = NULLVP; 830 newvp = NULLVP; 831 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 832 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 833 return (EROFS); 834 if (dvp->v_type != VDIR) 835 return (ENOTDIR); 836 837 /* 838 * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. 839 */ 840 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 841 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 842 if (error) 843 return error; 844 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) 845 return EISDIR; 846 VREF(dvp); 847 *vpp = dvp; 848 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 849 cnp->cn_flags |= SAVENAME; 850 return 0; 851 } 852 853 lockparent = flags & LOCKPARENT; 854 wantparent = flags & (LOCKPARENT|WANTPARENT); 855 np = VTONFS(dvp); 856 857 /* 858 * Before tediously performing a linear scan of the directory, 859 * check the name cache to see if the directory/name pair 860 * we are looking for is known already. 861 * If the directory/name pair is found in the name cache, 862 * we have to ensure the directory has not changed from 863 * the time the cache entry has been created. If it has, 864 * the cache entry has to be ignored. 865 */ 866 error = cache_lookup_raw(dvp, vpp, cnp); 867 KASSERT(dvp != *vpp); 868 if (error >= 0) { 869 struct vattr vattr; 870 int err2; 871 872 if (error && error != ENOENT) { 873 *vpp = NULLVP; 874 return error; 875 } 876 877 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 878 if (err2 != 0) { 879 if (error == 0) 880 vrele(*vpp); 881 *vpp = NULLVP; 882 return err2; 883 } 884 885 if (error == ENOENT) { 886 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 887 cnp->cn_proc) && timespeccmp(&vattr.va_mtime, 888 &VTONFS(dvp)->n_nctime, ==)) { 889 goto noentry; 890 } 891 cache_purge1(dvp, NULL, PURGE_CHILDREN); 892 timespecclear(&np->n_nctime); 893 goto dorpc; 894 } 895 896 newvp = *vpp; 897 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 898 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 899 nfsstats.lookupcache_hits++; 900 if ((flags & ISDOTDOT) != 0 || 901 (~flags & (LOCKPARENT|ISLASTCN)) != 0) { 902 VOP_UNLOCK(dvp, 0); 903 cnp->cn_flags |= PDIRUNLOCK; 904 } 905 error = vn_lock(newvp, LK_EXCLUSIVE); 906 if (error) { 907 /* newvp has been revoked. */ 908 vrele(newvp); 909 *vpp = NULL; 910 return error; 911 } 912 if ((~flags & (LOCKPARENT|ISLASTCN)) == 0 913 && (cnp->cn_flags & PDIRUNLOCK)) { 914 KASSERT(flags & ISDOTDOT); 915 error = vn_lock(dvp, LK_EXCLUSIVE); 916 if (error) { 917 vput(newvp); 918 *vpp = NULL; 919 return error; 920 } 921 cnp->cn_flags &= ~PDIRUNLOCK; 922 } 923 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 924 cnp->cn_flags |= SAVENAME; 925 KASSERT(newvp->v_type != VNON); 926 return (0); 927 } 928 cache_purge1(newvp, NULL, PURGE_PARENTS); 929 vrele(newvp); 930 *vpp = NULLVP; 931 } 932 dorpc: 933 #if 0 934 /* 935 * because nfsv3 has the same CREATE semantics as ours, 936 * we don't have to perform LOOKUPs beforehand. 937 * 938 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 939 * XXX although we have no way to know if O_EXCL is requested or not. 940 */ 941 942 if (v3 && cnp->cn_nameiop == CREATE && 943 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 944 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 945 KASSERT(lockparent); 946 cnp->cn_flags |= SAVENAME; 947 return (EJUSTRETURN); 948 } 949 #endif /* 0 */ 950 951 error = 0; 952 newvp = NULLVP; 953 nfsstats.lookupcache_misses++; 954 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 955 len = cnp->cn_namelen; 956 nfsm_reqhead(np, NFSPROC_LOOKUP, 957 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 958 nfsm_fhtom(np, v3); 959 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 960 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 961 if (error) { 962 nfsm_postop_attr(dvp, attrflag, 0); 963 m_freem(mrep); 964 goto nfsmout; 965 } 966 nfsm_getfh(fhp, fhsize, v3); 967 968 /* 969 * Handle RENAME case... 970 */ 971 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 972 if (NFS_CMPFH(np, fhp, fhsize)) { 973 m_freem(mrep); 974 return (EISDIR); 975 } 976 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 977 if (error) { 978 m_freem(mrep); 979 return error; 980 } 981 newvp = NFSTOV(np); 982 #ifndef NFS_V2_ONLY 983 if (v3) { 984 nfsm_postop_attr(newvp, attrflag, 0); 985 nfsm_postop_attr(dvp, attrflag, 0); 986 } else 987 #endif 988 nfsm_loadattr(newvp, (struct vattr *)0, 0); 989 *vpp = newvp; 990 m_freem(mrep); 991 cnp->cn_flags |= SAVENAME; 992 if (!lockparent) { 993 VOP_UNLOCK(dvp, 0); 994 cnp->cn_flags |= PDIRUNLOCK; 995 } 996 goto validate; 997 } 998 999 /* 1000 * The postop attr handling is duplicated for each if case, 1001 * because it should be done while dvp is locked (unlocking 1002 * dvp is different for each case). 1003 */ 1004 1005 if (NFS_CMPFH(np, fhp, fhsize)) { 1006 /* 1007 * "." lookup 1008 */ 1009 VREF(dvp); 1010 newvp = dvp; 1011 #ifndef NFS_V2_ONLY 1012 if (v3) { 1013 nfsm_postop_attr(newvp, attrflag, 0); 1014 nfsm_postop_attr(dvp, attrflag, 0); 1015 } else 1016 #endif 1017 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1018 } else if (flags & ISDOTDOT) { 1019 /* 1020 * ".." lookup 1021 */ 1022 VOP_UNLOCK(dvp, 0); 1023 cnp->cn_flags |= PDIRUNLOCK; 1024 1025 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1026 if (error) { 1027 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1028 cnp->cn_flags &= ~PDIRUNLOCK; 1029 m_freem(mrep); 1030 return error; 1031 } 1032 newvp = NFSTOV(np); 1033 1034 #ifndef NFS_V2_ONLY 1035 if (v3) { 1036 nfsm_postop_attr(newvp, attrflag, 0); 1037 nfsm_postop_attr(dvp, attrflag, 0); 1038 } else 1039 #endif 1040 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1041 1042 if (lockparent && (flags & ISLASTCN)) { 1043 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1044 m_freem(mrep); 1045 vput(newvp); 1046 return error; 1047 } 1048 cnp->cn_flags &= ~PDIRUNLOCK; 1049 } 1050 } else { 1051 /* 1052 * Other lookups. 1053 */ 1054 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1055 if (error) { 1056 m_freem(mrep); 1057 return error; 1058 } 1059 newvp = NFSTOV(np); 1060 #ifndef NFS_V2_ONLY 1061 if (v3) { 1062 nfsm_postop_attr(newvp, attrflag, 0); 1063 nfsm_postop_attr(dvp, attrflag, 0); 1064 } else 1065 #endif 1066 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1067 if (!lockparent || !(flags & ISLASTCN)) { 1068 VOP_UNLOCK(dvp, 0); 1069 cnp->cn_flags |= PDIRUNLOCK; 1070 } 1071 } 1072 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1073 cnp->cn_flags |= SAVENAME; 1074 if ((cnp->cn_flags & MAKEENTRY) && 1075 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1076 nfs_cache_enter(dvp, newvp, cnp); 1077 } 1078 *vpp = newvp; 1079 nfsm_reqdone; 1080 if (error) { 1081 /* 1082 * We get here only because of errors returned by 1083 * the RPC. Otherwise we'll have returned above 1084 * (the nfsm_* macros will jump to nfsm_reqdone 1085 * on error). 1086 */ 1087 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1088 cnp->cn_nameiop != CREATE) { 1089 nfs_cache_enter(dvp, NULL, cnp); 1090 } 1091 if (newvp != NULLVP) { 1092 vrele(newvp); 1093 if (newvp != dvp) 1094 VOP_UNLOCK(newvp, 0); 1095 } 1096 noentry: 1097 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1098 (flags & ISLASTCN) && error == ENOENT) { 1099 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1100 error = EROFS; 1101 } else { 1102 error = EJUSTRETURN; 1103 cnp->cn_flags |= SAVENAME; 1104 } 1105 } 1106 *vpp = NULL; 1107 return error; 1108 } 1109 1110 validate: 1111 /* 1112 * make sure we have valid type and size. 1113 */ 1114 1115 newvp = *vpp; 1116 if (newvp->v_type == VNON) { 1117 struct vattr vattr; /* dummy */ 1118 1119 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1120 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc); 1121 if (error) { 1122 vput(newvp); 1123 *vpp = NULL; 1124 } 1125 } 1126 1127 return error; 1128 } 1129 1130 /* 1131 * nfs read call. 1132 * Just call nfs_bioread() to do the work. 1133 */ 1134 int 1135 nfs_read(v) 1136 void *v; 1137 { 1138 struct vop_read_args /* { 1139 struct vnode *a_vp; 1140 struct uio *a_uio; 1141 int a_ioflag; 1142 struct ucred *a_cred; 1143 } */ *ap = v; 1144 struct vnode *vp = ap->a_vp; 1145 1146 if (vp->v_type != VREG) 1147 return (EPERM); 1148 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1149 } 1150 1151 /* 1152 * nfs readlink call 1153 */ 1154 int 1155 nfs_readlink(v) 1156 void *v; 1157 { 1158 struct vop_readlink_args /* { 1159 struct vnode *a_vp; 1160 struct uio *a_uio; 1161 struct ucred *a_cred; 1162 } */ *ap = v; 1163 struct vnode *vp = ap->a_vp; 1164 1165 if (vp->v_type != VLNK) 1166 return (EPERM); 1167 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1168 } 1169 1170 /* 1171 * Do a readlink rpc. 1172 * Called by nfs_doio() from below the buffer cache. 1173 */ 1174 int 1175 nfs_readlinkrpc(vp, uiop, cred) 1176 struct vnode *vp; 1177 struct uio *uiop; 1178 struct ucred *cred; 1179 { 1180 u_int32_t *tl; 1181 caddr_t cp; 1182 int32_t t1, t2; 1183 caddr_t bpos, dpos, cp2; 1184 int error = 0; 1185 uint32_t len; 1186 struct mbuf *mreq, *mrep, *md, *mb; 1187 const int v3 = NFS_ISV3(vp); 1188 struct nfsnode *np = VTONFS(vp); 1189 #ifndef NFS_V2_ONLY 1190 int attrflag; 1191 #endif 1192 1193 nfsstats.rpccnt[NFSPROC_READLINK]++; 1194 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1195 nfsm_fhtom(np, v3); 1196 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1197 #ifndef NFS_V2_ONLY 1198 if (v3) 1199 nfsm_postop_attr(vp, attrflag, 0); 1200 #endif 1201 if (!error) { 1202 #ifndef NFS_V2_ONLY 1203 if (v3) { 1204 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1205 len = fxdr_unsigned(uint32_t, *tl); 1206 if (len > MAXPATHLEN) { 1207 /* 1208 * this pathname is too long for us. 1209 */ 1210 m_freem(mrep); 1211 /* Solaris returns EINVAL. should we follow? */ 1212 error = ENAMETOOLONG; 1213 goto nfsmout; 1214 } 1215 } else 1216 #endif 1217 { 1218 nfsm_strsiz(len, NFS_MAXPATHLEN); 1219 } 1220 nfsm_mtouio(uiop, len); 1221 } 1222 nfsm_reqdone; 1223 return (error); 1224 } 1225 1226 /* 1227 * nfs read rpc call 1228 * Ditto above 1229 */ 1230 int 1231 nfs_readrpc(vp, uiop) 1232 struct vnode *vp; 1233 struct uio *uiop; 1234 { 1235 u_int32_t *tl; 1236 caddr_t cp; 1237 int32_t t1, t2; 1238 caddr_t bpos, dpos, cp2; 1239 struct mbuf *mreq, *mrep, *md, *mb; 1240 struct nfsmount *nmp; 1241 int error = 0, len, retlen, tsiz, eof; 1242 const int v3 = NFS_ISV3(vp); 1243 struct nfsnode *np = VTONFS(vp); 1244 #ifndef NFS_V2_ONLY 1245 int attrflag; 1246 #endif 1247 1248 #ifndef nolint 1249 eof = 0; 1250 #endif 1251 nmp = VFSTONFS(vp->v_mount); 1252 tsiz = uiop->uio_resid; 1253 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1254 return (EFBIG); 1255 while (tsiz > 0) { 1256 nfsstats.rpccnt[NFSPROC_READ]++; 1257 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1258 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1259 nfsm_fhtom(np, v3); 1260 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1261 #ifndef NFS_V2_ONLY 1262 if (v3) { 1263 txdr_hyper(uiop->uio_offset, tl); 1264 *(tl + 2) = txdr_unsigned(len); 1265 } else 1266 #endif 1267 { 1268 *tl++ = txdr_unsigned(uiop->uio_offset); 1269 *tl++ = txdr_unsigned(len); 1270 *tl = 0; 1271 } 1272 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, np->n_rcred); 1273 #ifndef NFS_V2_ONLY 1274 if (v3) { 1275 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1276 if (error) { 1277 m_freem(mrep); 1278 goto nfsmout; 1279 } 1280 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1281 eof = fxdr_unsigned(int, *(tl + 1)); 1282 } else 1283 #endif 1284 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1285 nfsm_strsiz(retlen, nmp->nm_rsize); 1286 nfsm_mtouio(uiop, retlen); 1287 m_freem(mrep); 1288 tsiz -= retlen; 1289 #ifndef NFS_V2_ONLY 1290 if (v3) { 1291 if (eof || retlen == 0) 1292 tsiz = 0; 1293 } else 1294 #endif 1295 if (retlen < len) 1296 tsiz = 0; 1297 } 1298 nfsmout: 1299 return (error); 1300 } 1301 1302 struct nfs_writerpc_context { 1303 struct simplelock nwc_slock; 1304 volatile int nwc_mbufcount; 1305 }; 1306 1307 /* 1308 * free mbuf used to refer protected pages while write rpc call. 1309 * called at splvm. 1310 */ 1311 static void 1312 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1313 { 1314 struct nfs_writerpc_context *ctx = arg; 1315 1316 KASSERT(m != NULL); 1317 KASSERT(ctx != NULL); 1318 pool_cache_put(&mbpool_cache, m); 1319 simple_lock(&ctx->nwc_slock); 1320 if (--ctx->nwc_mbufcount == 0) { 1321 wakeup(ctx); 1322 } 1323 simple_unlock(&ctx->nwc_slock); 1324 } 1325 1326 /* 1327 * nfs write call 1328 */ 1329 int 1330 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1331 struct vnode *vp; 1332 struct uio *uiop; 1333 int *iomode; 1334 boolean_t pageprotected; 1335 boolean_t *stalewriteverfp; 1336 { 1337 u_int32_t *tl; 1338 caddr_t cp; 1339 int32_t t1, t2; 1340 caddr_t bpos, dpos; 1341 struct mbuf *mreq, *mrep, *md, *mb; 1342 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1343 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1344 const int v3 = NFS_ISV3(vp); 1345 int committed = NFSV3WRITE_FILESYNC; 1346 struct nfsnode *np = VTONFS(vp); 1347 struct nfs_writerpc_context ctx; 1348 int s; 1349 struct lwp *l = NULL; 1350 size_t origresid; 1351 #ifndef NFS_V2_ONLY 1352 caddr_t cp2; 1353 int rlen, commit; 1354 #endif 1355 1356 simple_lock_init(&ctx.nwc_slock); 1357 ctx.nwc_mbufcount = 1; 1358 1359 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1360 panic("writerpc readonly vp %p", vp); 1361 } 1362 1363 #ifdef DIAGNOSTIC 1364 if (uiop->uio_iovcnt != 1) 1365 panic("nfs: writerpc iovcnt > 1"); 1366 #endif 1367 tsiz = uiop->uio_resid; 1368 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1369 return (EFBIG); 1370 if (pageprotected) { 1371 l = curlwp; 1372 PHOLD(l); 1373 } 1374 retry: 1375 origresid = uiop->uio_resid; 1376 KASSERT(origresid == uiop->uio_iov->iov_len); 1377 while (tsiz > 0) { 1378 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1379 uint32_t backup; 1380 boolean_t stalewriteverf = FALSE; 1381 1382 nfsstats.rpccnt[NFSPROC_WRITE]++; 1383 len = min(tsiz, nmp->nm_wsize); 1384 datalen = pageprotected ? 0 : nfsm_rndup(len); 1385 nfsm_reqhead(np, NFSPROC_WRITE, 1386 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1387 nfsm_fhtom(np, v3); 1388 #ifndef NFS_V2_ONLY 1389 if (v3) { 1390 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1391 txdr_hyper(uiop->uio_offset, tl); 1392 tl += 2; 1393 *tl++ = txdr_unsigned(len); 1394 *tl++ = txdr_unsigned(*iomode); 1395 *tl = txdr_unsigned(len); 1396 } else 1397 #endif 1398 { 1399 u_int32_t x; 1400 1401 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1402 /* Set both "begin" and "current" to non-garbage. */ 1403 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1404 *tl++ = x; /* "begin offset" */ 1405 *tl++ = x; /* "current offset" */ 1406 x = txdr_unsigned(len); 1407 *tl++ = x; /* total to this offset */ 1408 *tl = x; /* size of this write */ 1409 1410 } 1411 if (pageprotected) { 1412 /* 1413 * since we know pages can't be modified during i/o, 1414 * no need to copy them for us. 1415 */ 1416 struct mbuf *m; 1417 struct iovec *iovp = uiop->uio_iov; 1418 1419 m = m_get(M_WAIT, MT_DATA); 1420 MCLAIM(m, &nfs_mowner); 1421 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1422 nfs_writerpc_extfree, &ctx); 1423 m->m_flags |= M_EXT_ROMAP; 1424 m->m_len = len; 1425 mb->m_next = m; 1426 /* 1427 * no need to maintain mb and bpos here 1428 * because no one care them later. 1429 */ 1430 #if 0 1431 mb = m; 1432 bpos = mtod(caddr_t, mb) + mb->m_len; 1433 #endif 1434 iovp->iov_base = (char *)iovp->iov_base + len; 1435 iovp->iov_len -= len; 1436 uiop->uio_offset += len; 1437 uiop->uio_resid -= len; 1438 s = splvm(); 1439 simple_lock(&ctx.nwc_slock); 1440 ctx.nwc_mbufcount++; 1441 simple_unlock(&ctx.nwc_slock); 1442 splx(s); 1443 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1444 } else { 1445 nfsm_uiotom(uiop, len); 1446 } 1447 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, np->n_wcred); 1448 #ifndef NFS_V2_ONLY 1449 if (v3) { 1450 wccflag = NFSV3_WCCCHK; 1451 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1452 if (!error) { 1453 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1454 + NFSX_V3WRITEVERF); 1455 rlen = fxdr_unsigned(int, *tl++); 1456 if (rlen == 0) { 1457 error = NFSERR_IO; 1458 m_freem(mrep); 1459 break; 1460 } else if (rlen < len) { 1461 backup = len - rlen; 1462 uiop->uio_iov->iov_base = 1463 (caddr_t)uiop->uio_iov->iov_base - 1464 backup; 1465 uiop->uio_iov->iov_len += backup; 1466 uiop->uio_offset -= backup; 1467 uiop->uio_resid += backup; 1468 len = rlen; 1469 } 1470 commit = fxdr_unsigned(int, *tl++); 1471 1472 /* 1473 * Return the lowest committment level 1474 * obtained by any of the RPCs. 1475 */ 1476 if (committed == NFSV3WRITE_FILESYNC) 1477 committed = commit; 1478 else if (committed == NFSV3WRITE_DATASYNC && 1479 commit == NFSV3WRITE_UNSTABLE) 1480 committed = commit; 1481 simple_lock(&nmp->nm_slock); 1482 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1483 memcpy(nmp->nm_writeverf, tl, 1484 NFSX_V3WRITEVERF); 1485 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1486 } else if ((nmp->nm_iflag & 1487 NFSMNT_STALEWRITEVERF) || 1488 memcmp(tl, nmp->nm_writeverf, 1489 NFSX_V3WRITEVERF)) { 1490 memcpy(nmp->nm_writeverf, tl, 1491 NFSX_V3WRITEVERF); 1492 /* 1493 * note NFSMNT_STALEWRITEVERF 1494 * if we're the first thread to 1495 * notice it. 1496 */ 1497 if ((nmp->nm_iflag & 1498 NFSMNT_STALEWRITEVERF) == 0) { 1499 stalewriteverf = TRUE; 1500 nmp->nm_iflag |= 1501 NFSMNT_STALEWRITEVERF; 1502 } 1503 } 1504 simple_unlock(&nmp->nm_slock); 1505 } 1506 } else 1507 #endif 1508 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1509 if (wccflag) 1510 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1511 m_freem(mrep); 1512 if (error) 1513 break; 1514 tsiz -= len; 1515 if (stalewriteverf) { 1516 *stalewriteverfp = TRUE; 1517 stalewriteverf = FALSE; 1518 if (committed == NFSV3WRITE_UNSTABLE && 1519 len != origresid) { 1520 /* 1521 * if our write requests weren't atomic but 1522 * unstable, datas in previous iterations 1523 * might have already been lost now. 1524 * then, we should resend them to nfsd. 1525 */ 1526 backup = origresid - tsiz; 1527 uiop->uio_iov->iov_base = 1528 (caddr_t)uiop->uio_iov->iov_base - backup; 1529 uiop->uio_iov->iov_len += backup; 1530 uiop->uio_offset -= backup; 1531 uiop->uio_resid += backup; 1532 tsiz = origresid; 1533 goto retry; 1534 } 1535 } 1536 } 1537 nfsmout: 1538 if (pageprotected) { 1539 /* 1540 * wait until mbufs go away. 1541 * retransmitted mbufs can survive longer than rpc requests 1542 * themselves. 1543 */ 1544 s = splvm(); 1545 simple_lock(&ctx.nwc_slock); 1546 ctx.nwc_mbufcount--; 1547 while (ctx.nwc_mbufcount > 0) { 1548 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1549 } 1550 simple_unlock(&ctx.nwc_slock); 1551 splx(s); 1552 PRELE(l); 1553 } 1554 *iomode = committed; 1555 if (error) 1556 uiop->uio_resid = tsiz; 1557 return (error); 1558 } 1559 1560 /* 1561 * nfs mknod rpc 1562 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1563 * mode set to specify the file type and the size field for rdev. 1564 */ 1565 int 1566 nfs_mknodrpc(dvp, vpp, cnp, vap) 1567 struct vnode *dvp; 1568 struct vnode **vpp; 1569 struct componentname *cnp; 1570 struct vattr *vap; 1571 { 1572 struct nfsv2_sattr *sp; 1573 u_int32_t *tl; 1574 caddr_t cp; 1575 int32_t t1, t2; 1576 struct vnode *newvp = (struct vnode *)0; 1577 struct nfsnode *dnp, *np; 1578 char *cp2; 1579 caddr_t bpos, dpos; 1580 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1581 struct mbuf *mreq, *mrep, *md, *mb; 1582 u_int32_t rdev; 1583 const int v3 = NFS_ISV3(dvp); 1584 1585 if (vap->va_type == VCHR || vap->va_type == VBLK) 1586 rdev = txdr_unsigned(vap->va_rdev); 1587 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1588 rdev = nfs_xdrneg1; 1589 else { 1590 VOP_ABORTOP(dvp, cnp); 1591 vput(dvp); 1592 return (EOPNOTSUPP); 1593 } 1594 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1595 dnp = VTONFS(dvp); 1596 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1597 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1598 nfsm_fhtom(dnp, v3); 1599 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1600 #ifndef NFS_V2_ONLY 1601 if (v3) { 1602 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1603 *tl++ = vtonfsv3_type(vap->va_type); 1604 nfsm_v3attrbuild(vap, FALSE); 1605 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1606 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1607 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1608 *tl = txdr_unsigned(minor(vap->va_rdev)); 1609 } 1610 } else 1611 #endif 1612 { 1613 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1614 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1615 sp->sa_uid = nfs_xdrneg1; 1616 sp->sa_gid = nfs_xdrneg1; 1617 sp->sa_size = rdev; 1618 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1619 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1620 } 1621 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1622 if (!error) { 1623 nfsm_mtofh(dvp, newvp, v3, gotvp); 1624 if (!gotvp) { 1625 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1626 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1627 if (!error) 1628 newvp = NFSTOV(np); 1629 } 1630 } 1631 #ifndef NFS_V2_ONLY 1632 if (v3) 1633 nfsm_wcc_data(dvp, wccflag, 0); 1634 #endif 1635 nfsm_reqdone; 1636 if (error) { 1637 if (newvp) 1638 vput(newvp); 1639 } else { 1640 if (cnp->cn_flags & MAKEENTRY) 1641 nfs_cache_enter(dvp, newvp, cnp); 1642 *vpp = newvp; 1643 } 1644 PNBUF_PUT(cnp->cn_pnbuf); 1645 VTONFS(dvp)->n_flag |= NMODIFIED; 1646 if (!wccflag) 1647 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1648 vput(dvp); 1649 return (error); 1650 } 1651 1652 /* 1653 * nfs mknod vop 1654 * just call nfs_mknodrpc() to do the work. 1655 */ 1656 /* ARGSUSED */ 1657 int 1658 nfs_mknod(v) 1659 void *v; 1660 { 1661 struct vop_mknod_args /* { 1662 struct vnode *a_dvp; 1663 struct vnode **a_vpp; 1664 struct componentname *a_cnp; 1665 struct vattr *a_vap; 1666 } */ *ap = v; 1667 struct vnode *dvp = ap->a_dvp; 1668 struct componentname *cnp = ap->a_cnp; 1669 int error; 1670 1671 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1672 VN_KNOTE(dvp, NOTE_WRITE); 1673 if (error == 0 || error == EEXIST) 1674 cache_purge1(dvp, cnp, 0); 1675 return (error); 1676 } 1677 1678 #ifndef NFS_V2_ONLY 1679 static u_long create_verf; 1680 #endif 1681 /* 1682 * nfs file create call 1683 */ 1684 int 1685 nfs_create(v) 1686 void *v; 1687 { 1688 struct vop_create_args /* { 1689 struct vnode *a_dvp; 1690 struct vnode **a_vpp; 1691 struct componentname *a_cnp; 1692 struct vattr *a_vap; 1693 } */ *ap = v; 1694 struct vnode *dvp = ap->a_dvp; 1695 struct vattr *vap = ap->a_vap; 1696 struct componentname *cnp = ap->a_cnp; 1697 struct nfsv2_sattr *sp; 1698 u_int32_t *tl; 1699 caddr_t cp; 1700 int32_t t1, t2; 1701 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1702 struct vnode *newvp = (struct vnode *)0; 1703 caddr_t bpos, dpos, cp2; 1704 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1705 struct mbuf *mreq, *mrep, *md, *mb; 1706 const int v3 = NFS_ISV3(dvp); 1707 1708 /* 1709 * Oops, not for me.. 1710 */ 1711 if (vap->va_type == VSOCK) 1712 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1713 1714 KASSERT(vap->va_type == VREG); 1715 1716 #ifdef VA_EXCLUSIVE 1717 if (vap->va_vaflags & VA_EXCLUSIVE) 1718 fmode |= O_EXCL; 1719 #endif 1720 again: 1721 error = 0; 1722 nfsstats.rpccnt[NFSPROC_CREATE]++; 1723 dnp = VTONFS(dvp); 1724 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1725 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1726 nfsm_fhtom(dnp, v3); 1727 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1728 #ifndef NFS_V2_ONLY 1729 if (v3) { 1730 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1731 if (fmode & O_EXCL) { 1732 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1733 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1734 #ifdef INET 1735 if (TAILQ_FIRST(&in_ifaddrhead)) 1736 *tl++ = TAILQ_FIRST(&in_ifaddrhead)-> 1737 ia_addr.sin_addr.s_addr; 1738 else 1739 *tl++ = create_verf; 1740 #else 1741 *tl++ = create_verf; 1742 #endif 1743 *tl = ++create_verf; 1744 } else { 1745 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1746 nfsm_v3attrbuild(vap, FALSE); 1747 } 1748 } else 1749 #endif 1750 { 1751 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1752 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1753 sp->sa_uid = nfs_xdrneg1; 1754 sp->sa_gid = nfs_xdrneg1; 1755 sp->sa_size = 0; 1756 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1757 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1758 } 1759 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1760 if (!error) { 1761 nfsm_mtofh(dvp, newvp, v3, gotvp); 1762 if (!gotvp) { 1763 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1764 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1765 if (!error) 1766 newvp = NFSTOV(np); 1767 } 1768 } 1769 #ifndef NFS_V2_ONLY 1770 if (v3) 1771 nfsm_wcc_data(dvp, wccflag, 0); 1772 #endif 1773 nfsm_reqdone; 1774 if (error) { 1775 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1776 fmode &= ~O_EXCL; 1777 goto again; 1778 } 1779 } else if (v3 && (fmode & O_EXCL)) { 1780 struct timeval tm = time; 1781 1782 /* 1783 * make sure that we'll update timestamps as 1784 * most server implementations use them to store 1785 * the create verifier. 1786 * 1787 * XXX it's better to use TOSERVER always. 1788 */ 1789 1790 if (vap->va_atime.tv_sec == VNOVAL) { 1791 vap->va_atime.tv_sec = tm.tv_sec; 1792 vap->va_atime.tv_nsec = tm.tv_usec * 1000; 1793 } 1794 if (vap->va_mtime.tv_sec == VNOVAL) { 1795 vap->va_mtime.tv_sec = tm.tv_sec; 1796 vap->va_mtime.tv_nsec = tm.tv_usec * 1000; 1797 } 1798 1799 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1800 } 1801 if (error == 0) { 1802 if (cnp->cn_flags & MAKEENTRY) 1803 nfs_cache_enter(dvp, newvp, cnp); 1804 else 1805 cache_purge1(dvp, cnp, 0); 1806 *ap->a_vpp = newvp; 1807 } else { 1808 if (newvp) 1809 vput(newvp); 1810 if (error == EEXIST) 1811 cache_purge1(dvp, cnp, 0); 1812 } 1813 PNBUF_PUT(cnp->cn_pnbuf); 1814 VTONFS(dvp)->n_flag |= NMODIFIED; 1815 if (!wccflag) 1816 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1817 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1818 vput(dvp); 1819 return (error); 1820 } 1821 1822 /* 1823 * nfs file remove call 1824 * To try and make nfs semantics closer to ufs semantics, a file that has 1825 * other processes using the vnode is renamed instead of removed and then 1826 * removed later on the last close. 1827 * - If v_usecount > 1 1828 * If a rename is not already in the works 1829 * call nfs_sillyrename() to set it up 1830 * else 1831 * do the remove rpc 1832 */ 1833 int 1834 nfs_remove(v) 1835 void *v; 1836 { 1837 struct vop_remove_args /* { 1838 struct vnodeop_desc *a_desc; 1839 struct vnode * a_dvp; 1840 struct vnode * a_vp; 1841 struct componentname * a_cnp; 1842 } */ *ap = v; 1843 struct vnode *vp = ap->a_vp; 1844 struct vnode *dvp = ap->a_dvp; 1845 struct componentname *cnp = ap->a_cnp; 1846 struct nfsnode *np = VTONFS(vp); 1847 int error = 0; 1848 struct vattr vattr; 1849 1850 #ifndef DIAGNOSTIC 1851 if ((cnp->cn_flags & HASBUF) == 0) 1852 panic("nfs_remove: no name"); 1853 if (vp->v_usecount < 1) 1854 panic("nfs_remove: bad v_usecount"); 1855 #endif 1856 if (vp->v_type == VDIR) 1857 error = EPERM; 1858 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1859 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1860 vattr.va_nlink > 1)) { 1861 /* 1862 * Purge the name cache so that the chance of a lookup for 1863 * the name succeeding while the remove is in progress is 1864 * minimized. Without node locking it can still happen, such 1865 * that an I/O op returns ESTALE, but since you get this if 1866 * another host removes the file.. 1867 */ 1868 cache_purge(vp); 1869 /* 1870 * throw away biocache buffers, mainly to avoid 1871 * unnecessary delayed writes later. 1872 */ 1873 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1874 /* Do the rpc */ 1875 if (error != EINTR) 1876 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1877 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1878 } else if (!np->n_sillyrename) 1879 error = nfs_sillyrename(dvp, vp, cnp); 1880 PNBUF_PUT(cnp->cn_pnbuf); 1881 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1882 vattr.va_nlink == 1) { 1883 np->n_flag |= NREMOVED; 1884 } 1885 NFS_INVALIDATE_ATTRCACHE(np); 1886 VN_KNOTE(vp, NOTE_DELETE); 1887 VN_KNOTE(dvp, NOTE_WRITE); 1888 if (dvp == vp) 1889 vrele(vp); 1890 else 1891 vput(vp); 1892 vput(dvp); 1893 return (error); 1894 } 1895 1896 /* 1897 * nfs file remove rpc called from nfs_inactive 1898 */ 1899 int 1900 nfs_removeit(sp) 1901 struct sillyrename *sp; 1902 { 1903 1904 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1905 (struct proc *)0)); 1906 } 1907 1908 /* 1909 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1910 */ 1911 int 1912 nfs_removerpc(dvp, name, namelen, cred, proc) 1913 struct vnode *dvp; 1914 const char *name; 1915 int namelen; 1916 struct ucred *cred; 1917 struct proc *proc; 1918 { 1919 u_int32_t *tl; 1920 caddr_t cp; 1921 #ifndef NFS_V2_ONLY 1922 int32_t t1; 1923 caddr_t cp2; 1924 #endif 1925 int32_t t2; 1926 caddr_t bpos, dpos; 1927 int error = 0, wccflag = NFSV3_WCCRATTR; 1928 struct mbuf *mreq, *mrep, *md, *mb; 1929 const int v3 = NFS_ISV3(dvp); 1930 int rexmit; 1931 struct nfsnode *dnp = VTONFS(dvp); 1932 1933 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1934 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1935 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1936 nfsm_fhtom(dnp, v3); 1937 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1938 nfsm_request1(dnp, NFSPROC_REMOVE, proc, cred, &rexmit); 1939 #ifndef NFS_V2_ONLY 1940 if (v3) 1941 nfsm_wcc_data(dvp, wccflag, 0); 1942 #endif 1943 nfsm_reqdone; 1944 VTONFS(dvp)->n_flag |= NMODIFIED; 1945 if (!wccflag) 1946 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1947 /* 1948 * Kludge City: If the first reply to the remove rpc is lost.. 1949 * the reply to the retransmitted request will be ENOENT 1950 * since the file was in fact removed 1951 * Therefore, we cheat and return success. 1952 */ 1953 if (rexmit && error == ENOENT) 1954 error = 0; 1955 return (error); 1956 } 1957 1958 /* 1959 * nfs file rename call 1960 */ 1961 int 1962 nfs_rename(v) 1963 void *v; 1964 { 1965 struct vop_rename_args /* { 1966 struct vnode *a_fdvp; 1967 struct vnode *a_fvp; 1968 struct componentname *a_fcnp; 1969 struct vnode *a_tdvp; 1970 struct vnode *a_tvp; 1971 struct componentname *a_tcnp; 1972 } */ *ap = v; 1973 struct vnode *fvp = ap->a_fvp; 1974 struct vnode *tvp = ap->a_tvp; 1975 struct vnode *fdvp = ap->a_fdvp; 1976 struct vnode *tdvp = ap->a_tdvp; 1977 struct componentname *tcnp = ap->a_tcnp; 1978 struct componentname *fcnp = ap->a_fcnp; 1979 int error; 1980 1981 #ifndef DIAGNOSTIC 1982 if ((tcnp->cn_flags & HASBUF) == 0 || 1983 (fcnp->cn_flags & HASBUF) == 0) 1984 panic("nfs_rename: no name"); 1985 #endif 1986 /* Check for cross-device rename */ 1987 if ((fvp->v_mount != tdvp->v_mount) || 1988 (tvp && (fvp->v_mount != tvp->v_mount))) { 1989 error = EXDEV; 1990 goto out; 1991 } 1992 1993 /* 1994 * If the tvp exists and is in use, sillyrename it before doing the 1995 * rename of the new file over it. 1996 */ 1997 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1998 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1999 VN_KNOTE(tvp, NOTE_DELETE); 2000 vput(tvp); 2001 tvp = NULL; 2002 } 2003 2004 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2005 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 2006 tcnp->cn_proc); 2007 2008 VN_KNOTE(fdvp, NOTE_WRITE); 2009 VN_KNOTE(tdvp, NOTE_WRITE); 2010 if (error == 0 || error == EEXIST) { 2011 if (fvp->v_type == VDIR) 2012 cache_purge(fvp); 2013 else 2014 cache_purge1(fdvp, fcnp, 0); 2015 if (tvp != NULL && tvp->v_type == VDIR) 2016 cache_purge(tvp); 2017 else 2018 cache_purge1(tdvp, tcnp, 0); 2019 } 2020 out: 2021 if (tdvp == tvp) 2022 vrele(tdvp); 2023 else 2024 vput(tdvp); 2025 if (tvp) 2026 vput(tvp); 2027 vrele(fdvp); 2028 vrele(fvp); 2029 return (error); 2030 } 2031 2032 /* 2033 * nfs file rename rpc called from nfs_remove() above 2034 */ 2035 int 2036 nfs_renameit(sdvp, scnp, sp) 2037 struct vnode *sdvp; 2038 struct componentname *scnp; 2039 struct sillyrename *sp; 2040 { 2041 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2042 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 2043 } 2044 2045 /* 2046 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2047 */ 2048 int 2049 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 2050 struct vnode *fdvp; 2051 const char *fnameptr; 2052 int fnamelen; 2053 struct vnode *tdvp; 2054 const char *tnameptr; 2055 int tnamelen; 2056 struct ucred *cred; 2057 struct proc *proc; 2058 { 2059 u_int32_t *tl; 2060 caddr_t cp; 2061 #ifndef NFS_V2_ONLY 2062 int32_t t1; 2063 caddr_t cp2; 2064 #endif 2065 int32_t t2; 2066 caddr_t bpos, dpos; 2067 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2068 struct mbuf *mreq, *mrep, *md, *mb; 2069 const int v3 = NFS_ISV3(fdvp); 2070 int rexmit; 2071 struct nfsnode *fdnp = VTONFS(fdvp); 2072 2073 nfsstats.rpccnt[NFSPROC_RENAME]++; 2074 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2075 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2076 nfsm_rndup(tnamelen)); 2077 nfsm_fhtom(fdnp, v3); 2078 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2079 nfsm_fhtom(VTONFS(tdvp), v3); 2080 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2081 nfsm_request1(fdnp, NFSPROC_RENAME, proc, cred, &rexmit); 2082 #ifndef NFS_V2_ONLY 2083 if (v3) { 2084 nfsm_wcc_data(fdvp, fwccflag, 0); 2085 nfsm_wcc_data(tdvp, twccflag, 0); 2086 } 2087 #endif 2088 nfsm_reqdone; 2089 VTONFS(fdvp)->n_flag |= NMODIFIED; 2090 VTONFS(tdvp)->n_flag |= NMODIFIED; 2091 if (!fwccflag) 2092 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2093 if (!twccflag) 2094 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2095 /* 2096 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2097 */ 2098 if (rexmit && error == ENOENT) 2099 error = 0; 2100 return (error); 2101 } 2102 2103 /* 2104 * nfs hard link create call 2105 */ 2106 int 2107 nfs_link(v) 2108 void *v; 2109 { 2110 struct vop_link_args /* { 2111 struct vnode *a_dvp; 2112 struct vnode *a_vp; 2113 struct componentname *a_cnp; 2114 } */ *ap = v; 2115 struct vnode *vp = ap->a_vp; 2116 struct vnode *dvp = ap->a_dvp; 2117 struct componentname *cnp = ap->a_cnp; 2118 u_int32_t *tl; 2119 caddr_t cp; 2120 #ifndef NFS_V2_ONLY 2121 int32_t t1; 2122 caddr_t cp2; 2123 #endif 2124 int32_t t2; 2125 caddr_t bpos, dpos; 2126 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2127 struct mbuf *mreq, *mrep, *md, *mb; 2128 /* XXX Should be const and initialised? */ 2129 int v3; 2130 int rexmit; 2131 struct nfsnode *np; 2132 2133 if (dvp->v_mount != vp->v_mount) { 2134 VOP_ABORTOP(dvp, cnp); 2135 vput(dvp); 2136 return (EXDEV); 2137 } 2138 if (dvp != vp) { 2139 error = vn_lock(vp, LK_EXCLUSIVE); 2140 if (error != 0) { 2141 VOP_ABORTOP(dvp, cnp); 2142 vput(dvp); 2143 return error; 2144 } 2145 } 2146 2147 /* 2148 * Push all writes to the server, so that the attribute cache 2149 * doesn't get "out of sync" with the server. 2150 * XXX There should be a better way! 2151 */ 2152 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 2153 2154 v3 = NFS_ISV3(vp); 2155 nfsstats.rpccnt[NFSPROC_LINK]++; 2156 np = VTONFS(vp); 2157 nfsm_reqhead(np, NFSPROC_LINK, 2158 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2159 nfsm_fhtom(np, v3); 2160 nfsm_fhtom(VTONFS(dvp), v3); 2161 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2162 nfsm_request1(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred, &rexmit); 2163 #ifndef NFS_V2_ONLY 2164 if (v3) { 2165 nfsm_postop_attr(vp, attrflag, 0); 2166 nfsm_wcc_data(dvp, wccflag, 0); 2167 } 2168 #endif 2169 nfsm_reqdone; 2170 if (error == 0 || error == EEXIST) 2171 cache_purge1(dvp, cnp, 0); 2172 PNBUF_PUT(cnp->cn_pnbuf); 2173 VTONFS(dvp)->n_flag |= NMODIFIED; 2174 if (!attrflag) 2175 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2176 if (!wccflag) 2177 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2178 if (dvp != vp) 2179 VOP_UNLOCK(vp, 0); 2180 VN_KNOTE(vp, NOTE_LINK); 2181 VN_KNOTE(dvp, NOTE_WRITE); 2182 vput(dvp); 2183 /* 2184 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2185 */ 2186 if (rexmit && error == EEXIST) 2187 error = 0; 2188 return (error); 2189 } 2190 2191 /* 2192 * nfs symbolic link create call 2193 */ 2194 int 2195 nfs_symlink(v) 2196 void *v; 2197 { 2198 struct vop_symlink_args /* { 2199 struct vnode *a_dvp; 2200 struct vnode **a_vpp; 2201 struct componentname *a_cnp; 2202 struct vattr *a_vap; 2203 char *a_target; 2204 } */ *ap = v; 2205 struct vnode *dvp = ap->a_dvp; 2206 struct vattr *vap = ap->a_vap; 2207 struct componentname *cnp = ap->a_cnp; 2208 struct nfsv2_sattr *sp; 2209 u_int32_t *tl; 2210 caddr_t cp; 2211 int32_t t1, t2; 2212 caddr_t bpos, dpos, cp2; 2213 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2214 struct mbuf *mreq, *mrep, *md, *mb; 2215 struct vnode *newvp = (struct vnode *)0; 2216 const int v3 = NFS_ISV3(dvp); 2217 int rexmit; 2218 struct nfsnode *dnp = VTONFS(dvp); 2219 2220 *ap->a_vpp = NULL; 2221 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2222 slen = strlen(ap->a_target); 2223 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2224 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2225 nfsm_fhtom(dnp, v3); 2226 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2227 #ifndef NFS_V2_ONlY 2228 if (v3) 2229 nfsm_v3attrbuild(vap, FALSE); 2230 #endif 2231 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2232 #ifndef NFS_V2_ONlY 2233 if (!v3) { 2234 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2235 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2236 sp->sa_uid = nfs_xdrneg1; 2237 sp->sa_gid = nfs_xdrneg1; 2238 sp->sa_size = nfs_xdrneg1; 2239 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2240 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2241 } 2242 #endif 2243 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred, 2244 &rexmit); 2245 #ifndef NFS_V2_ONlY 2246 if (v3) { 2247 if (!error) 2248 nfsm_mtofh(dvp, newvp, v3, gotvp); 2249 nfsm_wcc_data(dvp, wccflag, 0); 2250 } 2251 #endif 2252 nfsm_reqdone; 2253 /* 2254 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2255 */ 2256 if (rexmit && error == EEXIST) 2257 error = 0; 2258 if (error == 0 || error == EEXIST) 2259 cache_purge1(dvp, cnp, 0); 2260 if (error == 0 && newvp == NULL) { 2261 struct nfsnode *np = NULL; 2262 2263 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2264 cnp->cn_cred, cnp->cn_proc, &np); 2265 if (error == 0) 2266 newvp = NFSTOV(np); 2267 } 2268 if (error) { 2269 if (newvp != NULL) 2270 vput(newvp); 2271 } else { 2272 *ap->a_vpp = newvp; 2273 } 2274 PNBUF_PUT(cnp->cn_pnbuf); 2275 VTONFS(dvp)->n_flag |= NMODIFIED; 2276 if (!wccflag) 2277 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2278 VN_KNOTE(dvp, NOTE_WRITE); 2279 vput(dvp); 2280 return (error); 2281 } 2282 2283 /* 2284 * nfs make dir call 2285 */ 2286 int 2287 nfs_mkdir(v) 2288 void *v; 2289 { 2290 struct vop_mkdir_args /* { 2291 struct vnode *a_dvp; 2292 struct vnode **a_vpp; 2293 struct componentname *a_cnp; 2294 struct vattr *a_vap; 2295 } */ *ap = v; 2296 struct vnode *dvp = ap->a_dvp; 2297 struct vattr *vap = ap->a_vap; 2298 struct componentname *cnp = ap->a_cnp; 2299 struct nfsv2_sattr *sp; 2300 u_int32_t *tl; 2301 caddr_t cp; 2302 int32_t t1, t2; 2303 int len; 2304 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2305 struct vnode *newvp = (struct vnode *)0; 2306 caddr_t bpos, dpos, cp2; 2307 int error = 0, wccflag = NFSV3_WCCRATTR; 2308 int gotvp = 0; 2309 int rexmit; 2310 struct mbuf *mreq, *mrep, *md, *mb; 2311 const int v3 = NFS_ISV3(dvp); 2312 2313 len = cnp->cn_namelen; 2314 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2315 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2316 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2317 nfsm_fhtom(dnp, v3); 2318 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2319 #ifndef NFS_V2_ONLY 2320 if (v3) { 2321 nfsm_v3attrbuild(vap, FALSE); 2322 } else 2323 #endif 2324 { 2325 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2326 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2327 sp->sa_uid = nfs_xdrneg1; 2328 sp->sa_gid = nfs_xdrneg1; 2329 sp->sa_size = nfs_xdrneg1; 2330 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2331 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2332 } 2333 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2334 if (!error) 2335 nfsm_mtofh(dvp, newvp, v3, gotvp); 2336 if (v3) 2337 nfsm_wcc_data(dvp, wccflag, 0); 2338 nfsm_reqdone; 2339 VTONFS(dvp)->n_flag |= NMODIFIED; 2340 if (!wccflag) 2341 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2342 /* 2343 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2344 * if we can succeed in looking up the directory. 2345 */ 2346 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2347 if (newvp) { 2348 vput(newvp); 2349 newvp = (struct vnode *)0; 2350 } 2351 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2352 cnp->cn_proc, &np); 2353 if (!error) { 2354 newvp = NFSTOV(np); 2355 if (newvp->v_type != VDIR || newvp == dvp) 2356 error = EEXIST; 2357 } 2358 } 2359 if (error) { 2360 if (newvp) { 2361 if (dvp != newvp) 2362 vput(newvp); 2363 else 2364 vrele(newvp); 2365 } 2366 } else { 2367 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2368 if (cnp->cn_flags & MAKEENTRY) 2369 nfs_cache_enter(dvp, newvp, cnp); 2370 *ap->a_vpp = newvp; 2371 } 2372 PNBUF_PUT(cnp->cn_pnbuf); 2373 vput(dvp); 2374 return (error); 2375 } 2376 2377 /* 2378 * nfs remove directory call 2379 */ 2380 int 2381 nfs_rmdir(v) 2382 void *v; 2383 { 2384 struct vop_rmdir_args /* { 2385 struct vnode *a_dvp; 2386 struct vnode *a_vp; 2387 struct componentname *a_cnp; 2388 } */ *ap = v; 2389 struct vnode *vp = ap->a_vp; 2390 struct vnode *dvp = ap->a_dvp; 2391 struct componentname *cnp = ap->a_cnp; 2392 u_int32_t *tl; 2393 caddr_t cp; 2394 #ifndef NFS_V2_ONLY 2395 int32_t t1; 2396 caddr_t cp2; 2397 #endif 2398 int32_t t2; 2399 caddr_t bpos, dpos; 2400 int error = 0, wccflag = NFSV3_WCCRATTR; 2401 int rexmit; 2402 struct mbuf *mreq, *mrep, *md, *mb; 2403 const int v3 = NFS_ISV3(dvp); 2404 struct nfsnode *dnp; 2405 2406 if (dvp == vp) { 2407 vrele(dvp); 2408 vput(dvp); 2409 PNBUF_PUT(cnp->cn_pnbuf); 2410 return (EINVAL); 2411 } 2412 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2413 dnp = VTONFS(dvp); 2414 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2415 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2416 nfsm_fhtom(dnp, v3); 2417 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2418 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred, &rexmit); 2419 #ifndef NFS_V2_ONLY 2420 if (v3) 2421 nfsm_wcc_data(dvp, wccflag, 0); 2422 #endif 2423 nfsm_reqdone; 2424 PNBUF_PUT(cnp->cn_pnbuf); 2425 VTONFS(dvp)->n_flag |= NMODIFIED; 2426 if (!wccflag) 2427 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2428 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2429 VN_KNOTE(vp, NOTE_DELETE); 2430 cache_purge(vp); 2431 vput(vp); 2432 vput(dvp); 2433 /* 2434 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2435 */ 2436 if (rexmit && error == ENOENT) 2437 error = 0; 2438 return (error); 2439 } 2440 2441 /* 2442 * nfs readdir call 2443 */ 2444 int 2445 nfs_readdir(v) 2446 void *v; 2447 { 2448 struct vop_readdir_args /* { 2449 struct vnode *a_vp; 2450 struct uio *a_uio; 2451 struct ucred *a_cred; 2452 int *a_eofflag; 2453 off_t **a_cookies; 2454 int *a_ncookies; 2455 } */ *ap = v; 2456 struct vnode *vp = ap->a_vp; 2457 struct uio *uio = ap->a_uio; 2458 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2459 char *base = uio->uio_iov->iov_base; 2460 int tresid, error; 2461 size_t count, lost; 2462 struct dirent *dp; 2463 off_t *cookies = NULL; 2464 int ncookies = 0, nc; 2465 2466 if (vp->v_type != VDIR) 2467 return (EPERM); 2468 2469 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2470 count = uio->uio_resid - lost; 2471 if (count <= 0) 2472 return (EINVAL); 2473 2474 /* 2475 * Call nfs_bioread() to do the real work. 2476 */ 2477 tresid = uio->uio_resid = count; 2478 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2479 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2480 2481 if (!error && ap->a_cookies) { 2482 ncookies = count / 16; 2483 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2484 *ap->a_cookies = cookies; 2485 } 2486 2487 if (!error && uio->uio_resid == tresid) { 2488 uio->uio_resid += lost; 2489 nfsstats.direofcache_misses++; 2490 if (ap->a_cookies) 2491 *ap->a_ncookies = 0; 2492 *ap->a_eofflag = 1; 2493 return (0); 2494 } 2495 2496 if (!error && ap->a_cookies) { 2497 /* 2498 * Only the NFS server and emulations use cookies, and they 2499 * load the directory block into system space, so we can 2500 * just look at it directly. 2501 */ 2502 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2503 panic("nfs_readdir: lost in space"); 2504 for (nc = 0; ncookies-- && 2505 base < (char *)uio->uio_iov->iov_base; nc++){ 2506 dp = (struct dirent *) base; 2507 if (dp->d_reclen == 0) 2508 break; 2509 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2510 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2511 else 2512 *(cookies++) = NFS_GETCOOKIE(dp); 2513 base += dp->d_reclen; 2514 } 2515 uio->uio_resid += 2516 ((caddr_t)uio->uio_iov->iov_base - base); 2517 uio->uio_iov->iov_len += 2518 ((caddr_t)uio->uio_iov->iov_base - base); 2519 uio->uio_iov->iov_base = base; 2520 *ap->a_ncookies = nc; 2521 } 2522 2523 uio->uio_resid += lost; 2524 *ap->a_eofflag = 0; 2525 return (error); 2526 } 2527 2528 /* 2529 * Readdir rpc call. 2530 * Called from below the buffer cache by nfs_doio(). 2531 */ 2532 int 2533 nfs_readdirrpc(vp, uiop, cred) 2534 struct vnode *vp; 2535 struct uio *uiop; 2536 struct ucred *cred; 2537 { 2538 int len, left; 2539 struct dirent *dp = NULL; 2540 u_int32_t *tl; 2541 caddr_t cp; 2542 int32_t t1, t2; 2543 caddr_t bpos, dpos, cp2; 2544 struct mbuf *mreq, *mrep, *md, *mb; 2545 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2546 struct nfsnode *dnp = VTONFS(vp); 2547 u_quad_t fileno; 2548 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2549 #ifndef NFS_V2_ONLY 2550 int attrflag; 2551 #endif 2552 int nrpcs = 0, reclen; 2553 const int v3 = NFS_ISV3(vp); 2554 2555 #ifdef DIAGNOSTIC 2556 /* 2557 * Should be called from buffer cache, so only amount of 2558 * NFS_DIRBLKSIZ will be requested. 2559 */ 2560 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2561 panic("nfs readdirrpc bad uio"); 2562 #endif 2563 2564 /* 2565 * Loop around doing readdir rpc's of size nm_readdirsize 2566 * truncated to a multiple of NFS_DIRFRAGSIZ. 2567 * The stopping criteria is EOF or buffer full. 2568 */ 2569 while (more_dirs && bigenough) { 2570 /* 2571 * Heuristic: don't bother to do another RPC to further 2572 * fill up this block if there is not much room left. (< 50% 2573 * of the readdir RPC size). This wastes some buffer space 2574 * but can save up to 50% in RPC calls. 2575 */ 2576 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2577 bigenough = 0; 2578 break; 2579 } 2580 nfsstats.rpccnt[NFSPROC_READDIR]++; 2581 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2582 NFSX_READDIR(v3)); 2583 nfsm_fhtom(dnp, v3); 2584 #ifndef NFS_V2_ONLY 2585 if (v3) { 2586 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2587 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2588 txdr_swapcookie3(uiop->uio_offset, tl); 2589 } else { 2590 txdr_cookie3(uiop->uio_offset, tl); 2591 } 2592 tl += 2; 2593 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2594 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2595 } else 2596 #endif 2597 { 2598 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2599 *tl++ = txdr_unsigned(uiop->uio_offset); 2600 } 2601 *tl = txdr_unsigned(nmp->nm_readdirsize); 2602 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2603 nrpcs++; 2604 #ifndef NFS_V2_ONLY 2605 if (v3) { 2606 nfsm_postop_attr(vp, attrflag, 0); 2607 if (!error) { 2608 nfsm_dissect(tl, u_int32_t *, 2609 2 * NFSX_UNSIGNED); 2610 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2611 dnp->n_cookieverf.nfsuquad[1] = *tl; 2612 } else { 2613 m_freem(mrep); 2614 goto nfsmout; 2615 } 2616 } 2617 #endif 2618 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2619 more_dirs = fxdr_unsigned(int, *tl); 2620 2621 /* loop thru the dir entries, doctoring them to 4bsd form */ 2622 while (more_dirs && bigenough) { 2623 #ifndef NFS_V2_ONLY 2624 if (v3) { 2625 nfsm_dissect(tl, u_int32_t *, 2626 3 * NFSX_UNSIGNED); 2627 fileno = fxdr_hyper(tl); 2628 len = fxdr_unsigned(int, *(tl + 2)); 2629 } else 2630 #endif 2631 { 2632 nfsm_dissect(tl, u_int32_t *, 2633 2 * NFSX_UNSIGNED); 2634 fileno = fxdr_unsigned(u_quad_t, *tl++); 2635 len = fxdr_unsigned(int, *tl); 2636 } 2637 if (len <= 0 || len > NFS_MAXNAMLEN) { 2638 error = EBADRPC; 2639 m_freem(mrep); 2640 goto nfsmout; 2641 } 2642 tlen = nfsm_rndup(len); 2643 if (tlen == len) 2644 tlen += 4; /* To ensure null termination */ 2645 tlen += sizeof (off_t) + sizeof (int); 2646 reclen = ALIGN(tlen + DIRHDSIZ); 2647 tlen = reclen - DIRHDSIZ; 2648 left = NFS_DIRFRAGSIZ - blksiz; 2649 if (reclen > left) { 2650 memset(uiop->uio_iov->iov_base, 0, left); 2651 dp->d_reclen += left; 2652 uiop->uio_iov->iov_base = 2653 (caddr_t)uiop->uio_iov->iov_base + left; 2654 uiop->uio_iov->iov_len -= left; 2655 uiop->uio_resid -= left; 2656 blksiz = 0; 2657 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2658 } 2659 if (reclen > uiop->uio_resid) 2660 bigenough = 0; 2661 if (bigenough) { 2662 dp = (struct dirent *)uiop->uio_iov->iov_base; 2663 dp->d_fileno = (int)fileno; 2664 dp->d_namlen = len; 2665 dp->d_reclen = reclen; 2666 dp->d_type = DT_UNKNOWN; 2667 blksiz += dp->d_reclen; 2668 if (blksiz == NFS_DIRFRAGSIZ) 2669 blksiz = 0; 2670 uiop->uio_resid -= DIRHDSIZ; 2671 uiop->uio_iov->iov_base = 2672 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2673 uiop->uio_iov->iov_len -= DIRHDSIZ; 2674 nfsm_mtouio(uiop, len); 2675 tlen -= len; 2676 /* null terminate */ 2677 KDASSERT(tlen > 0); 2678 memset(uiop->uio_iov->iov_base, 0, tlen); 2679 uiop->uio_iov->iov_base = 2680 (caddr_t)uiop->uio_iov->iov_base + tlen; 2681 uiop->uio_iov->iov_len -= tlen; 2682 uiop->uio_resid -= tlen; 2683 } else 2684 nfsm_adv(nfsm_rndup(len)); 2685 #ifndef NFS_V2_ONLY 2686 if (v3) { 2687 nfsm_dissect(tl, u_int32_t *, 2688 3 * NFSX_UNSIGNED); 2689 } else 2690 #endif 2691 { 2692 nfsm_dissect(tl, u_int32_t *, 2693 2 * NFSX_UNSIGNED); 2694 } 2695 if (bigenough) { 2696 #ifndef NFS_V2_ONLY 2697 if (v3) { 2698 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2699 uiop->uio_offset = 2700 fxdr_swapcookie3(tl); 2701 else 2702 uiop->uio_offset = 2703 fxdr_cookie3(tl); 2704 } 2705 else 2706 #endif 2707 { 2708 uiop->uio_offset = 2709 fxdr_unsigned(off_t, *tl); 2710 } 2711 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2712 } 2713 if (v3) 2714 tl += 2; 2715 else 2716 tl++; 2717 more_dirs = fxdr_unsigned(int, *tl); 2718 } 2719 /* 2720 * If at end of rpc data, get the eof boolean 2721 */ 2722 if (!more_dirs) { 2723 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2724 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2725 } 2726 m_freem(mrep); 2727 } 2728 /* 2729 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2730 * by increasing d_reclen for the last record. 2731 */ 2732 if (blksiz > 0) { 2733 left = NFS_DIRFRAGSIZ - blksiz; 2734 memset(uiop->uio_iov->iov_base, 0, left); 2735 dp->d_reclen += left; 2736 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2737 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2738 left; 2739 uiop->uio_iov->iov_len -= left; 2740 uiop->uio_resid -= left; 2741 } 2742 2743 /* 2744 * We are now either at the end of the directory or have filled the 2745 * block. 2746 */ 2747 if (bigenough) 2748 dnp->n_direofoffset = uiop->uio_offset; 2749 nfsmout: 2750 return (error); 2751 } 2752 2753 #ifndef NFS_V2_ONLY 2754 /* 2755 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2756 */ 2757 int 2758 nfs_readdirplusrpc(vp, uiop, cred) 2759 struct vnode *vp; 2760 struct uio *uiop; 2761 struct ucred *cred; 2762 { 2763 int len, left; 2764 struct dirent *dp = NULL; 2765 u_int32_t *tl; 2766 caddr_t cp; 2767 int32_t t1, t2; 2768 struct vnode *newvp; 2769 caddr_t bpos, dpos, cp2; 2770 struct mbuf *mreq, *mrep, *md, *mb; 2771 struct nameidata nami, *ndp = &nami; 2772 struct componentname *cnp = &ndp->ni_cnd; 2773 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2774 struct nfsnode *dnp = VTONFS(vp), *np; 2775 nfsfh_t *fhp; 2776 u_quad_t fileno; 2777 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2778 int attrflag, fhsize, nrpcs = 0, reclen; 2779 struct nfs_fattr fattr, *fp; 2780 2781 #ifdef DIAGNOSTIC 2782 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2783 panic("nfs readdirplusrpc bad uio"); 2784 #endif 2785 ndp->ni_dvp = vp; 2786 newvp = NULLVP; 2787 2788 /* 2789 * Loop around doing readdir rpc's of size nm_readdirsize 2790 * truncated to a multiple of NFS_DIRFRAGSIZ. 2791 * The stopping criteria is EOF or buffer full. 2792 */ 2793 while (more_dirs && bigenough) { 2794 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2795 bigenough = 0; 2796 break; 2797 } 2798 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2799 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2800 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2801 nfsm_fhtom(dnp, 1); 2802 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2803 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2804 txdr_swapcookie3(uiop->uio_offset, tl); 2805 } else { 2806 txdr_cookie3(uiop->uio_offset, tl); 2807 } 2808 tl += 2; 2809 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2810 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2811 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2812 *tl = txdr_unsigned(nmp->nm_rsize); 2813 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2814 nfsm_postop_attr(vp, attrflag, 0); 2815 if (error) { 2816 m_freem(mrep); 2817 goto nfsmout; 2818 } 2819 nrpcs++; 2820 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2821 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2822 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2823 more_dirs = fxdr_unsigned(int, *tl); 2824 2825 /* loop thru the dir entries, doctoring them to 4bsd form */ 2826 while (more_dirs && bigenough) { 2827 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2828 fileno = fxdr_hyper(tl); 2829 len = fxdr_unsigned(int, *(tl + 2)); 2830 if (len <= 0 || len > NFS_MAXNAMLEN) { 2831 error = EBADRPC; 2832 m_freem(mrep); 2833 goto nfsmout; 2834 } 2835 tlen = nfsm_rndup(len); 2836 if (tlen == len) 2837 tlen += 4; /* To ensure null termination*/ 2838 tlen += sizeof (off_t) + sizeof (int); 2839 reclen = ALIGN(tlen + DIRHDSIZ); 2840 tlen = reclen - DIRHDSIZ; 2841 left = NFS_DIRFRAGSIZ - blksiz; 2842 if (reclen > left) { 2843 /* 2844 * DIRFRAGSIZ is aligned, no need to align 2845 * again here. 2846 */ 2847 memset(uiop->uio_iov->iov_base, 0, left); 2848 dp->d_reclen += left; 2849 uiop->uio_iov->iov_base = 2850 (caddr_t)uiop->uio_iov->iov_base + left; 2851 uiop->uio_iov->iov_len -= left; 2852 uiop->uio_resid -= left; 2853 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2854 blksiz = 0; 2855 } 2856 if (reclen > uiop->uio_resid) 2857 bigenough = 0; 2858 if (bigenough) { 2859 dp = (struct dirent *)uiop->uio_iov->iov_base; 2860 dp->d_fileno = (int)fileno; 2861 dp->d_namlen = len; 2862 dp->d_reclen = reclen; 2863 dp->d_type = DT_UNKNOWN; 2864 blksiz += dp->d_reclen; 2865 if (blksiz == NFS_DIRFRAGSIZ) 2866 blksiz = 0; 2867 uiop->uio_resid -= DIRHDSIZ; 2868 uiop->uio_iov->iov_base = 2869 (caddr_t)uiop->uio_iov->iov_base + 2870 DIRHDSIZ; 2871 uiop->uio_iov->iov_len -= DIRHDSIZ; 2872 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2873 cnp->cn_namelen = len; 2874 nfsm_mtouio(uiop, len); 2875 tlen -= len; 2876 /* null terminate */ 2877 KDASSERT(tlen > 0); 2878 memset(uiop->uio_iov->iov_base, 0, tlen); 2879 uiop->uio_iov->iov_base = 2880 (caddr_t)uiop->uio_iov->iov_base + tlen; 2881 uiop->uio_iov->iov_len -= tlen; 2882 uiop->uio_resid -= tlen; 2883 } else 2884 nfsm_adv(nfsm_rndup(len)); 2885 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2886 if (bigenough) { 2887 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2888 uiop->uio_offset = 2889 fxdr_swapcookie3(tl); 2890 else 2891 uiop->uio_offset = 2892 fxdr_cookie3(tl); 2893 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2894 } 2895 tl += 2; 2896 2897 /* 2898 * Since the attributes are before the file handle 2899 * (sigh), we must skip over the attributes and then 2900 * come back and get them. 2901 */ 2902 attrflag = fxdr_unsigned(int, *tl); 2903 if (attrflag) { 2904 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2905 memcpy(&fattr, fp, NFSX_V3FATTR); 2906 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2907 doit = fxdr_unsigned(int, *tl); 2908 if (doit) { 2909 nfsm_getfh(fhp, fhsize, 1); 2910 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2911 VREF(vp); 2912 newvp = vp; 2913 np = dnp; 2914 } else { 2915 error = nfs_nget1(vp->v_mount, fhp, 2916 fhsize, &np, LK_NOWAIT); 2917 if (!error) 2918 newvp = NFSTOV(np); 2919 } 2920 if (!error) { 2921 const char *cp; 2922 2923 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2924 if (bigenough) { 2925 dp->d_type = 2926 IFTODT(VTTOIF(np->n_vattr->va_type)); 2927 if (cnp->cn_namelen <= NCHNAMLEN) { 2928 ndp->ni_vp = newvp; 2929 cp = cnp->cn_nameptr + 2930 cnp->cn_namelen; 2931 cnp->cn_hash = 2932 namei_hash(cnp->cn_nameptr, &cp); 2933 nfs_cache_enter(ndp->ni_dvp, 2934 ndp->ni_vp, cnp); 2935 } 2936 } 2937 } 2938 error = 0; 2939 } 2940 } else { 2941 /* Just skip over the file handle */ 2942 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2943 i = fxdr_unsigned(int, *tl); 2944 nfsm_adv(nfsm_rndup(i)); 2945 } 2946 if (newvp != NULLVP) { 2947 if (newvp == vp) 2948 vrele(newvp); 2949 else 2950 vput(newvp); 2951 newvp = NULLVP; 2952 } 2953 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2954 more_dirs = fxdr_unsigned(int, *tl); 2955 } 2956 /* 2957 * If at end of rpc data, get the eof boolean 2958 */ 2959 if (!more_dirs) { 2960 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2961 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2962 } 2963 m_freem(mrep); 2964 } 2965 /* 2966 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2967 * by increasing d_reclen for the last record. 2968 */ 2969 if (blksiz > 0) { 2970 left = NFS_DIRFRAGSIZ - blksiz; 2971 memset(uiop->uio_iov->iov_base, 0, left); 2972 dp->d_reclen += left; 2973 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2974 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2975 left; 2976 uiop->uio_iov->iov_len -= left; 2977 uiop->uio_resid -= left; 2978 } 2979 2980 /* 2981 * We are now either at the end of the directory or have filled the 2982 * block. 2983 */ 2984 if (bigenough) 2985 dnp->n_direofoffset = uiop->uio_offset; 2986 nfsmout: 2987 if (newvp != NULLVP) { 2988 if(newvp == vp) 2989 vrele(newvp); 2990 else 2991 vput(newvp); 2992 } 2993 return (error); 2994 } 2995 #endif 2996 2997 static char hextoasc[] = "0123456789abcdef"; 2998 2999 /* 3000 * Silly rename. To make the NFS filesystem that is stateless look a little 3001 * more like the "ufs" a remove of an active vnode is translated to a rename 3002 * to a funny looking filename that is removed by nfs_inactive on the 3003 * nfsnode. There is the potential for another process on a different client 3004 * to create the same funny name between the nfs_lookitup() fails and the 3005 * nfs_rename() completes, but... 3006 */ 3007 int 3008 nfs_sillyrename(dvp, vp, cnp) 3009 struct vnode *dvp, *vp; 3010 struct componentname *cnp; 3011 { 3012 struct sillyrename *sp; 3013 struct nfsnode *np; 3014 int error; 3015 short pid; 3016 3017 cache_purge(dvp); 3018 np = VTONFS(vp); 3019 #ifndef DIAGNOSTIC 3020 if (vp->v_type == VDIR) 3021 panic("nfs: sillyrename dir"); 3022 #endif 3023 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 3024 M_NFSREQ, M_WAITOK); 3025 sp->s_cred = crdup(cnp->cn_cred); 3026 sp->s_dvp = dvp; 3027 VREF(dvp); 3028 3029 /* Fudge together a funny name */ 3030 pid = cnp->cn_proc->p_pid; 3031 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3032 sp->s_namlen = 12; 3033 sp->s_name[8] = hextoasc[pid & 0xf]; 3034 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 3035 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 3036 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 3037 3038 /* Try lookitups until we get one that isn't there */ 3039 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3040 cnp->cn_proc, (struct nfsnode **)0) == 0) { 3041 sp->s_name[4]++; 3042 if (sp->s_name[4] > 'z') { 3043 error = EINVAL; 3044 goto bad; 3045 } 3046 } 3047 error = nfs_renameit(dvp, cnp, sp); 3048 if (error) 3049 goto bad; 3050 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3051 cnp->cn_proc, &np); 3052 np->n_sillyrename = sp; 3053 return (0); 3054 bad: 3055 vrele(sp->s_dvp); 3056 crfree(sp->s_cred); 3057 free((caddr_t)sp, M_NFSREQ); 3058 return (error); 3059 } 3060 3061 /* 3062 * Look up a file name and optionally either update the file handle or 3063 * allocate an nfsnode, depending on the value of npp. 3064 * npp == NULL --> just do the lookup 3065 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3066 * handled too 3067 * *npp != NULL --> update the file handle in the vnode 3068 */ 3069 int 3070 nfs_lookitup(dvp, name, len, cred, procp, npp) 3071 struct vnode *dvp; 3072 const char *name; 3073 int len; 3074 struct ucred *cred; 3075 struct proc *procp; 3076 struct nfsnode **npp; 3077 { 3078 u_int32_t *tl; 3079 caddr_t cp; 3080 int32_t t1, t2; 3081 struct vnode *newvp = (struct vnode *)0; 3082 struct nfsnode *np, *dnp = VTONFS(dvp); 3083 caddr_t bpos, dpos, cp2; 3084 int error = 0, fhlen; 3085 #ifndef NFS_V2_ONLY 3086 int attrflag; 3087 #endif 3088 struct mbuf *mreq, *mrep, *md, *mb; 3089 nfsfh_t *nfhp; 3090 const int v3 = NFS_ISV3(dvp); 3091 3092 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3093 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3094 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3095 nfsm_fhtom(dnp, v3); 3096 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3097 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 3098 if (npp && !error) { 3099 nfsm_getfh(nfhp, fhlen, v3); 3100 if (*npp) { 3101 np = *npp; 3102 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3103 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3104 np->n_fhp = &np->n_fh; 3105 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3106 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3107 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3108 np->n_fhsize = fhlen; 3109 newvp = NFSTOV(np); 3110 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3111 VREF(dvp); 3112 newvp = dvp; 3113 np = dnp; 3114 } else { 3115 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3116 if (error) { 3117 m_freem(mrep); 3118 return (error); 3119 } 3120 newvp = NFSTOV(np); 3121 } 3122 #ifndef NFS_V2_ONLY 3123 if (v3) { 3124 nfsm_postop_attr(newvp, attrflag, 0); 3125 if (!attrflag && *npp == NULL) { 3126 m_freem(mrep); 3127 vput(newvp); 3128 return (ENOENT); 3129 } 3130 } else 3131 #endif 3132 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3133 } 3134 nfsm_reqdone; 3135 if (npp && *npp == NULL) { 3136 if (error) { 3137 if (newvp) 3138 vput(newvp); 3139 } else 3140 *npp = np; 3141 } 3142 return (error); 3143 } 3144 3145 #ifndef NFS_V2_ONLY 3146 /* 3147 * Nfs Version 3 commit rpc 3148 */ 3149 int 3150 nfs_commit(vp, offset, cnt, procp) 3151 struct vnode *vp; 3152 off_t offset; 3153 uint32_t cnt; 3154 struct proc *procp; 3155 { 3156 caddr_t cp; 3157 u_int32_t *tl; 3158 int32_t t1, t2; 3159 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3160 caddr_t bpos, dpos, cp2; 3161 int error = 0, wccflag = NFSV3_WCCRATTR; 3162 struct mbuf *mreq, *mrep, *md, *mb; 3163 struct nfsnode *np; 3164 3165 KASSERT(NFS_ISV3(vp)); 3166 3167 #ifdef NFS_DEBUG_COMMIT 3168 printf("commit %lu - %lu\n", (unsigned long)offset, 3169 (unsigned long)(offset + cnt)); 3170 #endif 3171 3172 simple_lock(&nmp->nm_slock); 3173 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3174 simple_unlock(&nmp->nm_slock); 3175 return (0); 3176 } 3177 simple_unlock(&nmp->nm_slock); 3178 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3179 np = VTONFS(vp); 3180 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3181 nfsm_fhtom(np, 1); 3182 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3183 txdr_hyper(offset, tl); 3184 tl += 2; 3185 *tl = txdr_unsigned(cnt); 3186 nfsm_request(np, NFSPROC_COMMIT, procp, np->n_wcred); 3187 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 3188 if (!error) { 3189 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3190 simple_lock(&nmp->nm_slock); 3191 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3192 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3193 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3194 error = NFSERR_STALEWRITEVERF; 3195 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3196 } 3197 simple_unlock(&nmp->nm_slock); 3198 } 3199 nfsm_reqdone; 3200 return (error); 3201 } 3202 #endif 3203 3204 /* 3205 * Kludge City.. 3206 * - make nfs_bmap() essentially a no-op that does no translation 3207 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3208 * (Maybe I could use the process's page mapping, but I was concerned that 3209 * Kernel Write might not be enabled and also figured copyout() would do 3210 * a lot more work than memcpy() and also it currently happens in the 3211 * context of the swapper process (2). 3212 */ 3213 int 3214 nfs_bmap(v) 3215 void *v; 3216 { 3217 struct vop_bmap_args /* { 3218 struct vnode *a_vp; 3219 daddr_t a_bn; 3220 struct vnode **a_vpp; 3221 daddr_t *a_bnp; 3222 int *a_runp; 3223 } */ *ap = v; 3224 struct vnode *vp = ap->a_vp; 3225 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3226 3227 if (ap->a_vpp != NULL) 3228 *ap->a_vpp = vp; 3229 if (ap->a_bnp != NULL) 3230 *ap->a_bnp = ap->a_bn << bshift; 3231 if (ap->a_runp != NULL) 3232 *ap->a_runp = 1024 * 1024; /* XXX */ 3233 return (0); 3234 } 3235 3236 /* 3237 * Strategy routine. 3238 * For async requests when nfsiod(s) are running, queue the request by 3239 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3240 * request. 3241 */ 3242 int 3243 nfs_strategy(v) 3244 void *v; 3245 { 3246 struct vop_strategy_args *ap = v; 3247 struct buf *bp = ap->a_bp; 3248 struct proc *p; 3249 int error = 0; 3250 3251 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3252 panic("nfs physio/async"); 3253 if (bp->b_flags & B_ASYNC) 3254 p = NULL; 3255 else 3256 p = curproc; /* XXX */ 3257 3258 /* 3259 * If the op is asynchronous and an i/o daemon is waiting 3260 * queue the request, wake it up and wait for completion 3261 * otherwise just do it ourselves. 3262 */ 3263 3264 if ((bp->b_flags & B_ASYNC) == 0 || 3265 nfs_asyncio(bp)) 3266 error = nfs_doio(bp, p); 3267 return (error); 3268 } 3269 3270 /* 3271 * fsync vnode op. Just call nfs_flush() with commit == 1. 3272 */ 3273 /* ARGSUSED */ 3274 int 3275 nfs_fsync(v) 3276 void *v; 3277 { 3278 struct vop_fsync_args /* { 3279 struct vnodeop_desc *a_desc; 3280 struct vnode * a_vp; 3281 struct ucred * a_cred; 3282 int a_flags; 3283 off_t offlo; 3284 off_t offhi; 3285 struct proc * a_p; 3286 } */ *ap = v; 3287 3288 struct vnode *vp = ap->a_vp; 3289 3290 if (vp->v_type != VREG) 3291 return 0; 3292 3293 return (nfs_flush(vp, ap->a_cred, 3294 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3295 } 3296 3297 /* 3298 * Flush all the data associated with a vnode. 3299 */ 3300 int 3301 nfs_flush(vp, cred, waitfor, p, commit) 3302 struct vnode *vp; 3303 struct ucred *cred; 3304 int waitfor; 3305 struct proc *p; 3306 int commit; 3307 { 3308 struct nfsnode *np = VTONFS(vp); 3309 int error; 3310 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3311 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3312 3313 simple_lock(&vp->v_interlock); 3314 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3315 if (np->n_flag & NWRITEERR) { 3316 error = np->n_error; 3317 np->n_flag &= ~NWRITEERR; 3318 } 3319 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3320 return (error); 3321 } 3322 3323 /* 3324 * Return POSIX pathconf information applicable to nfs. 3325 * 3326 * N.B. The NFS V2 protocol doesn't support this RPC. 3327 */ 3328 /* ARGSUSED */ 3329 int 3330 nfs_pathconf(v) 3331 void *v; 3332 { 3333 struct vop_pathconf_args /* { 3334 struct vnode *a_vp; 3335 int a_name; 3336 register_t *a_retval; 3337 } */ *ap = v; 3338 struct nfsv3_pathconf *pcp; 3339 struct vnode *vp = ap->a_vp; 3340 struct mbuf *mreq, *mrep, *md, *mb; 3341 int32_t t1, t2; 3342 u_int32_t *tl; 3343 caddr_t bpos, dpos, cp, cp2; 3344 int error = 0, attrflag; 3345 #ifndef NFS_V2_ONLY 3346 struct nfsmount *nmp; 3347 unsigned int l; 3348 u_int64_t maxsize; 3349 #endif 3350 const int v3 = NFS_ISV3(vp); 3351 struct nfsnode *np = VTONFS(vp); 3352 3353 switch (ap->a_name) { 3354 /* Names that can be resolved locally. */ 3355 case _PC_PIPE_BUF: 3356 *ap->a_retval = PIPE_BUF; 3357 break; 3358 case _PC_SYNC_IO: 3359 *ap->a_retval = 1; 3360 break; 3361 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3362 case _PC_LINK_MAX: 3363 case _PC_NAME_MAX: 3364 case _PC_CHOWN_RESTRICTED: 3365 case _PC_NO_TRUNC: 3366 if (!v3) { 3367 error = EINVAL; 3368 break; 3369 } 3370 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3371 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3372 nfsm_fhtom(np, 1); 3373 nfsm_request(np, NFSPROC_PATHCONF, 3374 curproc, curproc->p_ucred); /* XXX */ 3375 nfsm_postop_attr(vp, attrflag, 0); 3376 if (!error) { 3377 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3378 NFSX_V3PATHCONF); 3379 switch (ap->a_name) { 3380 case _PC_LINK_MAX: 3381 *ap->a_retval = 3382 fxdr_unsigned(register_t, pcp->pc_linkmax); 3383 break; 3384 case _PC_NAME_MAX: 3385 *ap->a_retval = 3386 fxdr_unsigned(register_t, pcp->pc_namemax); 3387 break; 3388 case _PC_CHOWN_RESTRICTED: 3389 *ap->a_retval = 3390 (pcp->pc_chownrestricted == nfs_true); 3391 break; 3392 case _PC_NO_TRUNC: 3393 *ap->a_retval = 3394 (pcp->pc_notrunc == nfs_true); 3395 break; 3396 } 3397 } 3398 nfsm_reqdone; 3399 break; 3400 case _PC_FILESIZEBITS: 3401 #ifndef NFS_V2_ONLY 3402 if (v3) { 3403 nmp = VFSTONFS(vp->v_mount); 3404 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3405 if ((error = nfs_fsinfo(nmp, vp, 3406 curproc->p_ucred, curproc)) != 0) /* XXX */ 3407 break; 3408 for (l = 0, maxsize = nmp->nm_maxfilesize; 3409 (maxsize >> l) > 0; l++) 3410 ; 3411 *ap->a_retval = l + 1; 3412 } else 3413 #endif 3414 { 3415 *ap->a_retval = 32; /* NFS V2 limitation */ 3416 } 3417 break; 3418 default: 3419 error = EINVAL; 3420 break; 3421 } 3422 3423 return (error); 3424 } 3425 3426 /* 3427 * NFS advisory byte-level locks. 3428 */ 3429 int 3430 nfs_advlock(v) 3431 void *v; 3432 { 3433 struct vop_advlock_args /* { 3434 struct vnode *a_vp; 3435 caddr_t a_id; 3436 int a_op; 3437 struct flock *a_fl; 3438 int a_flags; 3439 } */ *ap = v; 3440 struct nfsnode *np = VTONFS(ap->a_vp); 3441 3442 return lf_advlock(ap, &np->n_lockf, np->n_size); 3443 } 3444 3445 /* 3446 * Print out the contents of an nfsnode. 3447 */ 3448 int 3449 nfs_print(v) 3450 void *v; 3451 { 3452 struct vop_print_args /* { 3453 struct vnode *a_vp; 3454 } */ *ap = v; 3455 struct vnode *vp = ap->a_vp; 3456 struct nfsnode *np = VTONFS(vp); 3457 3458 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3459 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3460 if (vp->v_type == VFIFO) 3461 fifo_printinfo(vp); 3462 printf("\n"); 3463 return (0); 3464 } 3465 3466 /* 3467 * nfs unlock wrapper. 3468 */ 3469 int 3470 nfs_unlock(void *v) 3471 { 3472 struct vop_unlock_args /* { 3473 struct vnode *a_vp; 3474 int a_flags; 3475 } */ *ap = v; 3476 struct vnode *vp = ap->a_vp; 3477 3478 /* 3479 * VOP_UNLOCK can be called by nfs_loadattrcache 3480 * with v_data == 0. 3481 */ 3482 if (VTONFS(vp)) { 3483 nfs_delayedtruncate(vp); 3484 } 3485 3486 return genfs_unlock(v); 3487 } 3488 3489 /* 3490 * nfs special file access vnode op. 3491 * Essentially just get vattr and then imitate iaccess() since the device is 3492 * local to the client. 3493 */ 3494 int 3495 nfsspec_access(v) 3496 void *v; 3497 { 3498 struct vop_access_args /* { 3499 struct vnode *a_vp; 3500 int a_mode; 3501 struct ucred *a_cred; 3502 struct proc *a_p; 3503 } */ *ap = v; 3504 struct vattr va; 3505 struct vnode *vp = ap->a_vp; 3506 int error; 3507 3508 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3509 if (error) 3510 return (error); 3511 3512 /* 3513 * Disallow write attempts on filesystems mounted read-only; 3514 * unless the file is a socket, fifo, or a block or character 3515 * device resident on the filesystem. 3516 */ 3517 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3518 switch (vp->v_type) { 3519 case VREG: 3520 case VDIR: 3521 case VLNK: 3522 return (EROFS); 3523 default: 3524 break; 3525 } 3526 } 3527 3528 return (vaccess(va.va_type, va.va_mode, 3529 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3530 } 3531 3532 /* 3533 * Read wrapper for special devices. 3534 */ 3535 int 3536 nfsspec_read(v) 3537 void *v; 3538 { 3539 struct vop_read_args /* { 3540 struct vnode *a_vp; 3541 struct uio *a_uio; 3542 int a_ioflag; 3543 struct ucred *a_cred; 3544 } */ *ap = v; 3545 struct nfsnode *np = VTONFS(ap->a_vp); 3546 3547 /* 3548 * Set access flag. 3549 */ 3550 np->n_flag |= NACC; 3551 np->n_atim.tv_sec = time.tv_sec; 3552 np->n_atim.tv_nsec = time.tv_usec * 1000; 3553 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3554 } 3555 3556 /* 3557 * Write wrapper for special devices. 3558 */ 3559 int 3560 nfsspec_write(v) 3561 void *v; 3562 { 3563 struct vop_write_args /* { 3564 struct vnode *a_vp; 3565 struct uio *a_uio; 3566 int a_ioflag; 3567 struct ucred *a_cred; 3568 } */ *ap = v; 3569 struct nfsnode *np = VTONFS(ap->a_vp); 3570 3571 /* 3572 * Set update flag. 3573 */ 3574 np->n_flag |= NUPD; 3575 np->n_mtim.tv_sec = time.tv_sec; 3576 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3577 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3578 } 3579 3580 /* 3581 * Close wrapper for special devices. 3582 * 3583 * Update the times on the nfsnode then do device close. 3584 */ 3585 int 3586 nfsspec_close(v) 3587 void *v; 3588 { 3589 struct vop_close_args /* { 3590 struct vnode *a_vp; 3591 int a_fflag; 3592 struct ucred *a_cred; 3593 struct proc *a_p; 3594 } */ *ap = v; 3595 struct vnode *vp = ap->a_vp; 3596 struct nfsnode *np = VTONFS(vp); 3597 struct vattr vattr; 3598 3599 if (np->n_flag & (NACC | NUPD)) { 3600 np->n_flag |= NCHG; 3601 if (vp->v_usecount == 1 && 3602 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3603 VATTR_NULL(&vattr); 3604 if (np->n_flag & NACC) 3605 vattr.va_atime = np->n_atim; 3606 if (np->n_flag & NUPD) 3607 vattr.va_mtime = np->n_mtim; 3608 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3609 } 3610 } 3611 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3612 } 3613 3614 /* 3615 * Read wrapper for fifos. 3616 */ 3617 int 3618 nfsfifo_read(v) 3619 void *v; 3620 { 3621 struct vop_read_args /* { 3622 struct vnode *a_vp; 3623 struct uio *a_uio; 3624 int a_ioflag; 3625 struct ucred *a_cred; 3626 } */ *ap = v; 3627 struct nfsnode *np = VTONFS(ap->a_vp); 3628 3629 /* 3630 * Set access flag. 3631 */ 3632 np->n_flag |= NACC; 3633 np->n_atim.tv_sec = time.tv_sec; 3634 np->n_atim.tv_nsec = time.tv_usec * 1000; 3635 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3636 } 3637 3638 /* 3639 * Write wrapper for fifos. 3640 */ 3641 int 3642 nfsfifo_write(v) 3643 void *v; 3644 { 3645 struct vop_write_args /* { 3646 struct vnode *a_vp; 3647 struct uio *a_uio; 3648 int a_ioflag; 3649 struct ucred *a_cred; 3650 } */ *ap = v; 3651 struct nfsnode *np = VTONFS(ap->a_vp); 3652 3653 /* 3654 * Set update flag. 3655 */ 3656 np->n_flag |= NUPD; 3657 np->n_mtim.tv_sec = time.tv_sec; 3658 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3659 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3660 } 3661 3662 /* 3663 * Close wrapper for fifos. 3664 * 3665 * Update the times on the nfsnode then do fifo close. 3666 */ 3667 int 3668 nfsfifo_close(v) 3669 void *v; 3670 { 3671 struct vop_close_args /* { 3672 struct vnode *a_vp; 3673 int a_fflag; 3674 struct ucred *a_cred; 3675 struct proc *a_p; 3676 } */ *ap = v; 3677 struct vnode *vp = ap->a_vp; 3678 struct nfsnode *np = VTONFS(vp); 3679 struct vattr vattr; 3680 3681 if (np->n_flag & (NACC | NUPD)) { 3682 if (np->n_flag & NACC) { 3683 np->n_atim.tv_sec = time.tv_sec; 3684 np->n_atim.tv_nsec = time.tv_usec * 1000; 3685 } 3686 if (np->n_flag & NUPD) { 3687 np->n_mtim.tv_sec = time.tv_sec; 3688 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3689 } 3690 np->n_flag |= NCHG; 3691 if (vp->v_usecount == 1 && 3692 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3693 VATTR_NULL(&vattr); 3694 if (np->n_flag & NACC) 3695 vattr.va_atime = np->n_atim; 3696 if (np->n_flag & NUPD) 3697 vattr.va_mtime = np->n_mtim; 3698 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3699 } 3700 } 3701 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3702 } 3703
Indexes created Thu Sep 25 16:09:42 GMT 2025