nfs_vnops.c revision 1.243
1 /* $NetBSD: nfs_vnops.c,v 1.243 2006/10/12 01:32:47 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * vnode op calls for Sun NFS version 2 and 3 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.243 2006/10/12 01:32:47 christos Exp $"); 43 44 #include "opt_inet.h" 45 #include "opt_nfs.h" 46 #include "opt_uvmhist.h" 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/resourcevar.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/disk.h> 57 #include <sys/malloc.h> 58 #include <sys/mbuf.h> 59 #include <sys/namei.h> 60 #include <sys/vnode.h> 61 #include <sys/dirent.h> 62 #include <sys/fcntl.h> 63 #include <sys/hash.h> 64 #include <sys/lockf.h> 65 #include <sys/stat.h> 66 #include <sys/unistd.h> 67 #include <sys/kauth.h> 68 69 #include <uvm/uvm_extern.h> 70 #include <uvm/uvm.h> 71 72 #include <miscfs/fifofs/fifo.h> 73 #include <miscfs/genfs/genfs.h> 74 #include <miscfs/specfs/specdev.h> 75 76 #include <nfs/rpcv2.h> 77 #include <nfs/nfsproto.h> 78 #include <nfs/nfs.h> 79 #include <nfs/nfsnode.h> 80 #include <nfs/nfsmount.h> 81 #include <nfs/xdr_subs.h> 82 #include <nfs/nfsm_subs.h> 83 #include <nfs/nqnfs.h> 84 #include <nfs/nfs_var.h> 85 86 #include <net/if.h> 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 90 /* 91 * Global vfs data structures for nfs 92 */ 93 int (**nfsv2_vnodeop_p) __P((void *)); 94 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 95 { &vop_default_desc, vn_default_error }, 96 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 97 { &vop_create_desc, nfs_create }, /* create */ 98 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 99 { &vop_open_desc, nfs_open }, /* open */ 100 { &vop_close_desc, nfs_close }, /* close */ 101 { &vop_access_desc, nfs_access }, /* access */ 102 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 103 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 104 { &vop_read_desc, nfs_read }, /* read */ 105 { &vop_write_desc, nfs_write }, /* write */ 106 { &vop_lease_desc, nfs_lease_check }, /* lease */ 107 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 108 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 109 { &vop_poll_desc, nfs_poll }, /* poll */ 110 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 111 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 112 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 113 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 114 { &vop_seek_desc, nfs_seek }, /* seek */ 115 { &vop_remove_desc, nfs_remove }, /* remove */ 116 { &vop_link_desc, nfs_link }, /* link */ 117 { &vop_rename_desc, nfs_rename }, /* rename */ 118 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 119 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 120 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 121 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 122 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 123 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 124 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 125 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 126 { &vop_lock_desc, nfs_lock }, /* lock */ 127 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 128 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 129 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 130 { &vop_print_desc, nfs_print }, /* print */ 131 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 132 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 133 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 134 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 135 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 136 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 137 { NULL, NULL } 138 }; 139 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 140 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 141 142 /* 143 * Special device vnode ops 144 */ 145 int (**spec_nfsv2nodeop_p) __P((void *)); 146 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 147 { &vop_default_desc, vn_default_error }, 148 { &vop_lookup_desc, spec_lookup }, /* lookup */ 149 { &vop_create_desc, spec_create }, /* create */ 150 { &vop_mknod_desc, spec_mknod }, /* mknod */ 151 { &vop_open_desc, spec_open }, /* open */ 152 { &vop_close_desc, nfsspec_close }, /* close */ 153 { &vop_access_desc, nfsspec_access }, /* access */ 154 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 155 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 156 { &vop_read_desc, nfsspec_read }, /* read */ 157 { &vop_write_desc, nfsspec_write }, /* write */ 158 { &vop_lease_desc, spec_lease_check }, /* lease */ 159 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 160 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 161 { &vop_poll_desc, spec_poll }, /* poll */ 162 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 163 { &vop_revoke_desc, spec_revoke }, /* revoke */ 164 { &vop_mmap_desc, spec_mmap }, /* mmap */ 165 { &vop_fsync_desc, spec_fsync }, /* fsync */ 166 { &vop_seek_desc, spec_seek }, /* seek */ 167 { &vop_remove_desc, spec_remove }, /* remove */ 168 { &vop_link_desc, spec_link }, /* link */ 169 { &vop_rename_desc, spec_rename }, /* rename */ 170 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 171 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 172 { &vop_symlink_desc, spec_symlink }, /* symlink */ 173 { &vop_readdir_desc, spec_readdir }, /* readdir */ 174 { &vop_readlink_desc, spec_readlink }, /* readlink */ 175 { &vop_abortop_desc, spec_abortop }, /* abortop */ 176 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 177 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 178 { &vop_lock_desc, nfs_lock }, /* lock */ 179 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 180 { &vop_bmap_desc, spec_bmap }, /* bmap */ 181 { &vop_strategy_desc, spec_strategy }, /* strategy */ 182 { &vop_print_desc, nfs_print }, /* print */ 183 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 184 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 185 { &vop_advlock_desc, spec_advlock }, /* advlock */ 186 { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ 187 { &vop_getpages_desc, spec_getpages }, /* getpages */ 188 { &vop_putpages_desc, spec_putpages }, /* putpages */ 189 { NULL, NULL } 190 }; 191 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 192 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 193 194 int (**fifo_nfsv2nodeop_p) __P((void *)); 195 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 196 { &vop_default_desc, vn_default_error }, 197 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 198 { &vop_create_desc, fifo_create }, /* create */ 199 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 200 { &vop_open_desc, fifo_open }, /* open */ 201 { &vop_close_desc, nfsfifo_close }, /* close */ 202 { &vop_access_desc, nfsspec_access }, /* access */ 203 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 204 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 205 { &vop_read_desc, nfsfifo_read }, /* read */ 206 { &vop_write_desc, nfsfifo_write }, /* write */ 207 { &vop_lease_desc, fifo_lease_check }, /* lease */ 208 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 209 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 210 { &vop_poll_desc, fifo_poll }, /* poll */ 211 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 212 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 213 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 214 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 215 { &vop_seek_desc, fifo_seek }, /* seek */ 216 { &vop_remove_desc, fifo_remove }, /* remove */ 217 { &vop_link_desc, fifo_link }, /* link */ 218 { &vop_rename_desc, fifo_rename }, /* rename */ 219 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 220 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 221 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 222 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 223 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 224 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 225 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 226 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 227 { &vop_lock_desc, nfs_lock }, /* lock */ 228 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 229 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 230 { &vop_strategy_desc, genfs_badop }, /* strategy */ 231 { &vop_print_desc, nfs_print }, /* print */ 232 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 233 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 234 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 235 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 236 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 237 { NULL, NULL } 238 }; 239 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 240 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 241 242 static int nfs_linkrpc(struct vnode *, struct vnode *, const char *, 243 size_t, kauth_cred_t, struct lwp *); 244 static void nfs_writerpc_extfree(struct mbuf *, caddr_t, size_t, void *); 245 246 /* 247 * Global variables 248 */ 249 extern u_int32_t nfs_true, nfs_false; 250 extern u_int32_t nfs_xdrneg1; 251 extern const nfstype nfsv3_type[9]; 252 253 int nfs_numasync = 0; 254 #define DIRHDSIZ _DIRENT_NAMEOFF(dp) 255 #define UIO_ADVANCE(uio, siz) \ 256 (void)((uio)->uio_resid -= (siz), \ 257 (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ 258 (uio)->uio_iov->iov_len -= (siz)) 259 260 static void nfs_cache_enter(struct vnode *, struct vnode *, 261 struct componentname *); 262 263 static void 264 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 265 struct componentname *cnp) 266 { 267 struct nfsnode *dnp = VTONFS(dvp); 268 269 if (vp != NULL) { 270 struct nfsnode *np = VTONFS(vp); 271 272 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 273 } 274 275 if (!timespecisset(&dnp->n_nctime)) 276 dnp->n_nctime = dnp->n_vattr->va_mtime; 277 278 cache_enter(dvp, vp, cnp); 279 } 280 281 /* 282 * nfs null call from vfs. 283 */ 284 int 285 nfs_null(vp, cred, l) 286 struct vnode *vp; 287 kauth_cred_t cred; 288 struct lwp *l; 289 { 290 caddr_t bpos, dpos; 291 int error = 0; 292 struct mbuf *mreq, *mrep, *md, *mb; 293 struct nfsnode *np = VTONFS(vp); 294 295 nfsm_reqhead(np, NFSPROC_NULL, 0); 296 nfsm_request(np, NFSPROC_NULL, l, cred); 297 nfsm_reqdone; 298 return (error); 299 } 300 301 /* 302 * nfs access vnode op. 303 * For nfs version 2, just return ok. File accesses may fail later. 304 * For nfs version 3, use the access rpc to check accessibility. If file modes 305 * are changed on the server, accesses might still fail later. 306 */ 307 int 308 nfs_access(v) 309 void *v; 310 { 311 struct vop_access_args /* { 312 struct vnode *a_vp; 313 int a_mode; 314 kauth_cred_t a_cred; 315 struct lwp *a_l; 316 } */ *ap = v; 317 struct vnode *vp = ap->a_vp; 318 #ifndef NFS_V2_ONLY 319 u_int32_t *tl; 320 caddr_t cp; 321 int32_t t1, t2; 322 caddr_t bpos, dpos, cp2; 323 int error = 0, attrflag; 324 struct mbuf *mreq, *mrep, *md, *mb; 325 u_int32_t mode, rmode; 326 const int v3 = NFS_ISV3(vp); 327 #endif 328 int cachevalid; 329 struct nfsnode *np = VTONFS(vp); 330 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 331 332 cachevalid = (np->n_accstamp != -1 && 333 (time_uptime - np->n_accstamp) < NFS_ATTRTIMEO(nmp, np) && 334 np->n_accuid == kauth_cred_geteuid(ap->a_cred)); 335 336 /* 337 * Check access cache first. If this request has been made for this 338 * uid shortly before, use the cached result. 339 */ 340 if (cachevalid) { 341 if (!np->n_accerror) { 342 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 343 return np->n_accerror; 344 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 345 return np->n_accerror; 346 } 347 348 #ifndef NFS_V2_ONLY 349 /* 350 * For nfs v3, do an access rpc, otherwise you are stuck emulating 351 * ufs_access() locally using the vattr. This may not be correct, 352 * since the server may apply other access criteria such as 353 * client uid-->server uid mapping that we do not know about, but 354 * this is better than just returning anything that is lying about 355 * in the cache. 356 */ 357 if (v3) { 358 nfsstats.rpccnt[NFSPROC_ACCESS]++; 359 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 360 nfsm_fhtom(np, v3); 361 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 362 if (ap->a_mode & VREAD) 363 mode = NFSV3ACCESS_READ; 364 else 365 mode = 0; 366 if (vp->v_type != VDIR) { 367 if (ap->a_mode & VWRITE) 368 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 369 if (ap->a_mode & VEXEC) 370 mode |= NFSV3ACCESS_EXECUTE; 371 } else { 372 if (ap->a_mode & VWRITE) 373 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 374 NFSV3ACCESS_DELETE); 375 if (ap->a_mode & VEXEC) 376 mode |= NFSV3ACCESS_LOOKUP; 377 } 378 *tl = txdr_unsigned(mode); 379 nfsm_request(np, NFSPROC_ACCESS, ap->a_l, ap->a_cred); 380 nfsm_postop_attr(vp, attrflag, 0); 381 if (!error) { 382 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 383 rmode = fxdr_unsigned(u_int32_t, *tl); 384 /* 385 * The NFS V3 spec does not clarify whether or not 386 * the returned access bits can be a superset of 387 * the ones requested, so... 388 */ 389 if ((rmode & mode) != mode) 390 error = EACCES; 391 } 392 nfsm_reqdone; 393 } else 394 #endif 395 return (nfsspec_access(ap)); 396 #ifndef NFS_V2_ONLY 397 /* 398 * Disallow write attempts on filesystems mounted read-only; 399 * unless the file is a socket, fifo, or a block or character 400 * device resident on the filesystem. 401 */ 402 if (!error && (ap->a_mode & VWRITE) && 403 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 404 switch (vp->v_type) { 405 case VREG: 406 case VDIR: 407 case VLNK: 408 error = EROFS; 409 default: 410 break; 411 } 412 } 413 414 if (!error || error == EACCES) { 415 /* 416 * If we got the same result as for a previous, 417 * different request, OR it in. Don't update 418 * the timestamp in that case. 419 */ 420 if (cachevalid && np->n_accstamp != -1 && 421 error == np->n_accerror) { 422 if (!error) 423 np->n_accmode |= ap->a_mode; 424 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 425 np->n_accmode = ap->a_mode; 426 } else { 427 np->n_accstamp = time_uptime; 428 np->n_accuid = kauth_cred_geteuid(ap->a_cred); 429 np->n_accmode = ap->a_mode; 430 np->n_accerror = error; 431 } 432 } 433 434 return (error); 435 #endif 436 } 437 438 /* 439 * nfs open vnode op 440 * Check to see if the type is ok 441 * and that deletion is not in progress. 442 * For paged in text files, you will need to flush the page cache 443 * if consistency is lost. 444 */ 445 /* ARGSUSED */ 446 int 447 nfs_open(v) 448 void *v; 449 { 450 struct vop_open_args /* { 451 struct vnode *a_vp; 452 int a_mode; 453 kauth_cred_t a_cred; 454 struct lwp *a_l; 455 } */ *ap = v; 456 struct vnode *vp = ap->a_vp; 457 struct nfsnode *np = VTONFS(vp); 458 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 459 int error; 460 461 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 462 return (EACCES); 463 } 464 465 if (ap->a_mode & FREAD) { 466 if (np->n_rcred != NULL) 467 kauth_cred_free(np->n_rcred); 468 np->n_rcred = ap->a_cred; 469 kauth_cred_hold(np->n_rcred); 470 } 471 if (ap->a_mode & FWRITE) { 472 if (np->n_wcred != NULL) 473 kauth_cred_free(np->n_wcred); 474 np->n_wcred = ap->a_cred; 475 kauth_cred_hold(np->n_wcred); 476 } 477 478 #ifndef NFS_V2_ONLY 479 /* 480 * Get a valid lease. If cached data is stale, flush it. 481 */ 482 if (nmp->nm_flag & NFSMNT_NQNFS) { 483 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 484 do { 485 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 486 ap->a_l); 487 } while (error == NQNFS_EXPIRED); 488 if (error) 489 return (error); 490 if (np->n_lrev != np->n_brev || 491 (np->n_flag & NQNFSNONCACHE)) { 492 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 493 ap->a_l, 1)) == EINTR) 494 return (error); 495 np->n_brev = np->n_lrev; 496 } 497 } 498 } else 499 #endif 500 { 501 error = nfs_flushstalebuf(vp, ap->a_cred, ap->a_l, 0); 502 if (error) 503 return error; 504 } 505 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 506 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 507 return (0); 508 } 509 510 /* 511 * nfs close vnode op 512 * What an NFS client should do upon close after writing is a debatable issue. 513 * Most NFS clients push delayed writes to the server upon close, basically for 514 * two reasons: 515 * 1 - So that any write errors may be reported back to the client process 516 * doing the close system call. By far the two most likely errors are 517 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 518 * 2 - To put a worst case upper bound on cache inconsistency between 519 * multiple clients for the file. 520 * There is also a consistency problem for Version 2 of the protocol w.r.t. 521 * not being able to tell if other clients are writing a file concurrently, 522 * since there is no way of knowing if the changed modify time in the reply 523 * is only due to the write for this client. 524 * (NFS Version 3 provides weak cache consistency data in the reply that 525 * should be sufficient to detect and handle this case.) 526 * 527 * The current code does the following: 528 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 529 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 530 * or commit them (this satisfies 1 and 2 except for the 531 * case where the server crashes after this close but 532 * before the commit RPC, which is felt to be "good 533 * enough". Changing the last argument to nfs_flush() to 534 * a 1 would force a commit operation, if it is felt a 535 * commit is necessary now. 536 * for NQNFS - do nothing now, since 2 is dealt with via leases and 537 * 1 should be dealt with via an fsync() system call for 538 * cases where write errors are important. 539 */ 540 /* ARGSUSED */ 541 int 542 nfs_close(v) 543 void *v; 544 { 545 struct vop_close_args /* { 546 struct vnodeop_desc *a_desc; 547 struct vnode *a_vp; 548 int a_fflag; 549 kauth_cred_t a_cred; 550 struct lwp *a_l; 551 } */ *ap = v; 552 struct vnode *vp = ap->a_vp; 553 struct nfsnode *np = VTONFS(vp); 554 int error = 0; 555 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 556 557 if (vp->v_type == VREG) { 558 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 559 (np->n_flag & NMODIFIED)) { 560 #ifndef NFS_V2_ONLY 561 if (NFS_ISV3(vp)) { 562 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_l, 0); 563 np->n_flag &= ~NMODIFIED; 564 } else 565 #endif 566 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_l, 1); 567 NFS_INVALIDATE_ATTRCACHE(np); 568 } 569 if (np->n_flag & NWRITEERR) { 570 np->n_flag &= ~NWRITEERR; 571 error = np->n_error; 572 } 573 } 574 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 575 return (error); 576 } 577 578 /* 579 * nfs getattr call from vfs. 580 */ 581 int 582 nfs_getattr(v) 583 void *v; 584 { 585 struct vop_getattr_args /* { 586 struct vnode *a_vp; 587 struct vattr *a_vap; 588 kauth_cred_t a_cred; 589 struct lwp *a_l; 590 } */ *ap = v; 591 struct vnode *vp = ap->a_vp; 592 struct nfsnode *np = VTONFS(vp); 593 caddr_t cp; 594 u_int32_t *tl; 595 int32_t t1, t2; 596 caddr_t bpos, dpos; 597 int error = 0; 598 struct mbuf *mreq, *mrep, *md, *mb; 599 const int v3 = NFS_ISV3(vp); 600 601 /* 602 * Update local times for special files. 603 */ 604 if (np->n_flag & (NACC | NUPD)) 605 np->n_flag |= NCHG; 606 607 /* 608 * if we have delayed truncation, do it now. 609 */ 610 nfs_delayedtruncate(vp); 611 612 /* 613 * First look in the cache. 614 */ 615 if (nfs_getattrcache(vp, ap->a_vap) == 0) 616 return (0); 617 nfsstats.rpccnt[NFSPROC_GETATTR]++; 618 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 619 nfsm_fhtom(np, v3); 620 nfsm_request(np, NFSPROC_GETATTR, ap->a_l, ap->a_cred); 621 if (!error) { 622 nfsm_loadattr(vp, ap->a_vap, 0); 623 if (vp->v_type == VDIR && 624 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 625 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 626 } 627 nfsm_reqdone; 628 return (error); 629 } 630 631 /* 632 * nfs setattr call. 633 */ 634 int 635 nfs_setattr(v) 636 void *v; 637 { 638 struct vop_setattr_args /* { 639 struct vnodeop_desc *a_desc; 640 struct vnode *a_vp; 641 struct vattr *a_vap; 642 kauth_cred_t a_cred; 643 struct lwp *a_l; 644 } */ *ap = v; 645 struct vnode *vp = ap->a_vp; 646 struct nfsnode *np = VTONFS(vp); 647 struct vattr *vap = ap->a_vap; 648 int error = 0; 649 u_quad_t tsize = 0; 650 651 /* 652 * Setting of flags is not supported. 653 */ 654 if (vap->va_flags != VNOVAL) 655 return (EOPNOTSUPP); 656 657 /* 658 * Disallow write attempts if the filesystem is mounted read-only. 659 */ 660 if ((vap->va_uid != (uid_t)VNOVAL || 661 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 662 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 663 (vp->v_mount->mnt_flag & MNT_RDONLY)) 664 return (EROFS); 665 if (vap->va_size != VNOVAL) { 666 switch (vp->v_type) { 667 case VDIR: 668 return (EISDIR); 669 case VCHR: 670 case VBLK: 671 case VSOCK: 672 case VFIFO: 673 if (vap->va_mtime.tv_sec == VNOVAL && 674 vap->va_atime.tv_sec == VNOVAL && 675 vap->va_mode == (mode_t)VNOVAL && 676 vap->va_uid == (uid_t)VNOVAL && 677 vap->va_gid == (gid_t)VNOVAL) 678 return (0); 679 vap->va_size = VNOVAL; 680 break; 681 default: 682 /* 683 * Disallow write attempts if the filesystem is 684 * mounted read-only. 685 */ 686 if (vp->v_mount->mnt_flag & MNT_RDONLY) 687 return (EROFS); 688 uvm_vnp_setsize(vp, vap->va_size); 689 tsize = np->n_size; 690 np->n_size = vap->va_size; 691 if (vap->va_size == 0) 692 error = nfs_vinvalbuf(vp, 0, 693 ap->a_cred, ap->a_l, 1); 694 else 695 error = nfs_vinvalbuf(vp, V_SAVE, 696 ap->a_cred, ap->a_l, 1); 697 if (error) { 698 uvm_vnp_setsize(vp, tsize); 699 return (error); 700 } 701 np->n_vattr->va_size = vap->va_size; 702 } 703 } else { 704 /* 705 * flush files before setattr because a later write of 706 * cached data might change timestamps or reset sugid bits 707 */ 708 if ((vap->va_mtime.tv_sec != VNOVAL || 709 vap->va_atime.tv_sec != VNOVAL || 710 vap->va_mode != VNOVAL) && 711 vp->v_type == VREG && 712 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 713 ap->a_l, 1)) == EINTR) 714 return (error); 715 } 716 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_l); 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, l) 730 struct vnode *vp; 731 struct vattr *vap; 732 kauth_cred_t cred; 733 struct lwp *l; 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, l, cred); 779 #ifndef NFS_V2_ONLY 780 if (v3) { 781 nfsm_wcc_data(vp, wccflag, 0, FALSE); 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_lwp); 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_lwp); 878 if (err2 != 0) { 879 if (error == 0) 880 vrele(*vpp); 881 *vpp = NULLVP; 882 return err2; 883 } 884 885 if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 886 cnp->cn_lwp) || timespeccmp(&vattr.va_mtime, 887 &VTONFS(dvp)->n_nctime, !=)) { 888 if (error == 0) { 889 vrele(*vpp); 890 *vpp = NULLVP; 891 } 892 cache_purge1(dvp, NULL, PURGE_CHILDREN); 893 timespecclear(&np->n_nctime); 894 goto dorpc; 895 } 896 897 if (error == ENOENT) { 898 goto noentry; 899 } 900 901 newvp = *vpp; 902 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp) 903 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 904 nfsstats.lookupcache_hits++; 905 if ((flags & ISDOTDOT) != 0 || 906 (~flags & (LOCKPARENT|ISLASTCN)) != 0) { 907 VOP_UNLOCK(dvp, 0); 908 cnp->cn_flags |= PDIRUNLOCK; 909 } 910 error = vn_lock(newvp, LK_EXCLUSIVE); 911 if (error) { 912 /* newvp has been revoked. */ 913 vrele(newvp); 914 *vpp = NULL; 915 return error; 916 } 917 if ((~flags & (LOCKPARENT|ISLASTCN)) == 0 918 && (cnp->cn_flags & PDIRUNLOCK)) { 919 KASSERT(flags & ISDOTDOT); 920 error = vn_lock(dvp, LK_EXCLUSIVE); 921 if (error) { 922 vput(newvp); 923 *vpp = NULL; 924 return error; 925 } 926 cnp->cn_flags &= ~PDIRUNLOCK; 927 } 928 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 929 cnp->cn_flags |= SAVENAME; 930 KASSERT(newvp->v_type != VNON); 931 return (0); 932 } 933 cache_purge1(newvp, NULL, PURGE_PARENTS); 934 vrele(newvp); 935 *vpp = NULLVP; 936 } 937 dorpc: 938 #if 0 939 /* 940 * because nfsv3 has the same CREATE semantics as ours, 941 * we don't have to perform LOOKUPs beforehand. 942 * 943 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 944 * XXX although we have no way to know if O_EXCL is requested or not. 945 */ 946 947 if (v3 && cnp->cn_nameiop == CREATE && 948 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 949 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 950 KASSERT(lockparent); 951 cnp->cn_flags |= SAVENAME; 952 return (EJUSTRETURN); 953 } 954 #endif /* 0 */ 955 956 error = 0; 957 newvp = NULLVP; 958 nfsstats.lookupcache_misses++; 959 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 960 len = cnp->cn_namelen; 961 nfsm_reqhead(np, NFSPROC_LOOKUP, 962 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 963 nfsm_fhtom(np, v3); 964 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 965 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_lwp, cnp->cn_cred); 966 if (error) { 967 nfsm_postop_attr(dvp, attrflag, 0); 968 m_freem(mrep); 969 goto nfsmout; 970 } 971 nfsm_getfh(fhp, fhsize, v3); 972 973 /* 974 * Handle RENAME case... 975 */ 976 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 977 if (NFS_CMPFH(np, fhp, fhsize)) { 978 m_freem(mrep); 979 return (EISDIR); 980 } 981 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 982 if (error) { 983 m_freem(mrep); 984 return error; 985 } 986 newvp = NFSTOV(np); 987 #ifndef NFS_V2_ONLY 988 if (v3) { 989 nfsm_postop_attr(newvp, attrflag, 0); 990 nfsm_postop_attr(dvp, attrflag, 0); 991 } else 992 #endif 993 nfsm_loadattr(newvp, (struct vattr *)0, 0); 994 *vpp = newvp; 995 m_freem(mrep); 996 cnp->cn_flags |= SAVENAME; 997 if (!lockparent) { 998 VOP_UNLOCK(dvp, 0); 999 cnp->cn_flags |= PDIRUNLOCK; 1000 } 1001 goto validate; 1002 } 1003 1004 /* 1005 * The postop attr handling is duplicated for each if case, 1006 * because it should be done while dvp is locked (unlocking 1007 * dvp is different for each case). 1008 */ 1009 1010 if (NFS_CMPFH(np, fhp, fhsize)) { 1011 /* 1012 * "." lookup 1013 */ 1014 VREF(dvp); 1015 newvp = dvp; 1016 #ifndef NFS_V2_ONLY 1017 if (v3) { 1018 nfsm_postop_attr(newvp, attrflag, 0); 1019 nfsm_postop_attr(dvp, attrflag, 0); 1020 } else 1021 #endif 1022 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1023 } else if (flags & ISDOTDOT) { 1024 /* 1025 * ".." lookup 1026 */ 1027 VOP_UNLOCK(dvp, 0); 1028 cnp->cn_flags |= PDIRUNLOCK; 1029 1030 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1031 if (error) { 1032 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 1033 cnp->cn_flags &= ~PDIRUNLOCK; 1034 m_freem(mrep); 1035 return error; 1036 } 1037 newvp = NFSTOV(np); 1038 1039 #ifndef NFS_V2_ONLY 1040 if (v3) { 1041 nfsm_postop_attr(newvp, attrflag, 0); 1042 nfsm_postop_attr(dvp, attrflag, 0); 1043 } else 1044 #endif 1045 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1046 1047 if (lockparent && (flags & ISLASTCN)) { 1048 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 1049 m_freem(mrep); 1050 vput(newvp); 1051 return error; 1052 } 1053 cnp->cn_flags &= ~PDIRUNLOCK; 1054 } 1055 } else { 1056 /* 1057 * Other lookups. 1058 */ 1059 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1060 if (error) { 1061 m_freem(mrep); 1062 return error; 1063 } 1064 newvp = NFSTOV(np); 1065 #ifndef NFS_V2_ONLY 1066 if (v3) { 1067 nfsm_postop_attr(newvp, attrflag, 0); 1068 nfsm_postop_attr(dvp, attrflag, 0); 1069 } else 1070 #endif 1071 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1072 if (!lockparent || !(flags & ISLASTCN)) { 1073 VOP_UNLOCK(dvp, 0); 1074 cnp->cn_flags |= PDIRUNLOCK; 1075 } 1076 } 1077 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1078 cnp->cn_flags |= SAVENAME; 1079 if ((cnp->cn_flags & MAKEENTRY) && 1080 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1081 nfs_cache_enter(dvp, newvp, cnp); 1082 } 1083 *vpp = newvp; 1084 nfsm_reqdone; 1085 if (error) { 1086 /* 1087 * We get here only because of errors returned by 1088 * the RPC. Otherwise we'll have returned above 1089 * (the nfsm_* macros will jump to nfsm_reqdone 1090 * on error). 1091 */ 1092 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1093 cnp->cn_nameiop != CREATE) { 1094 nfs_cache_enter(dvp, NULL, cnp); 1095 } 1096 if (newvp != NULLVP) { 1097 vrele(newvp); 1098 if (newvp != dvp) 1099 VOP_UNLOCK(newvp, 0); 1100 } 1101 noentry: 1102 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1103 (flags & ISLASTCN) && error == ENOENT) { 1104 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1105 error = EROFS; 1106 } else { 1107 error = EJUSTRETURN; 1108 cnp->cn_flags |= SAVENAME; 1109 } 1110 } 1111 *vpp = NULL; 1112 return error; 1113 } 1114 1115 validate: 1116 /* 1117 * make sure we have valid type and size. 1118 */ 1119 1120 newvp = *vpp; 1121 if (newvp->v_type == VNON) { 1122 struct vattr vattr; /* dummy */ 1123 1124 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1125 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_lwp); 1126 if (error) { 1127 vput(newvp); 1128 *vpp = NULL; 1129 } 1130 } 1131 1132 return error; 1133 } 1134 1135 /* 1136 * nfs read call. 1137 * Just call nfs_bioread() to do the work. 1138 */ 1139 int 1140 nfs_read(v) 1141 void *v; 1142 { 1143 struct vop_read_args /* { 1144 struct vnode *a_vp; 1145 struct uio *a_uio; 1146 int a_ioflag; 1147 kauth_cred_t a_cred; 1148 } */ *ap = v; 1149 struct vnode *vp = ap->a_vp; 1150 1151 if (vp->v_type != VREG) 1152 return EISDIR; 1153 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1154 } 1155 1156 /* 1157 * nfs readlink call 1158 */ 1159 int 1160 nfs_readlink(v) 1161 void *v; 1162 { 1163 struct vop_readlink_args /* { 1164 struct vnode *a_vp; 1165 struct uio *a_uio; 1166 kauth_cred_t a_cred; 1167 } */ *ap = v; 1168 struct vnode *vp = ap->a_vp; 1169 struct nfsnode *np = VTONFS(vp); 1170 1171 if (vp->v_type != VLNK) 1172 return (EPERM); 1173 1174 if (np->n_rcred != NULL) { 1175 kauth_cred_free(np->n_rcred); 1176 } 1177 np->n_rcred = ap->a_cred; 1178 kauth_cred_hold(np->n_rcred); 1179 1180 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1181 } 1182 1183 /* 1184 * Do a readlink rpc. 1185 * Called by nfs_doio() from below the buffer cache. 1186 */ 1187 int 1188 nfs_readlinkrpc(vp, uiop, cred) 1189 struct vnode *vp; 1190 struct uio *uiop; 1191 kauth_cred_t cred; 1192 { 1193 u_int32_t *tl; 1194 caddr_t cp; 1195 int32_t t1, t2; 1196 caddr_t bpos, dpos, cp2; 1197 int error = 0; 1198 uint32_t len; 1199 struct mbuf *mreq, *mrep, *md, *mb; 1200 const int v3 = NFS_ISV3(vp); 1201 struct nfsnode *np = VTONFS(vp); 1202 #ifndef NFS_V2_ONLY 1203 int attrflag; 1204 #endif 1205 1206 nfsstats.rpccnt[NFSPROC_READLINK]++; 1207 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1208 nfsm_fhtom(np, v3); 1209 nfsm_request(np, NFSPROC_READLINK, curlwp, cred); 1210 #ifndef NFS_V2_ONLY 1211 if (v3) 1212 nfsm_postop_attr(vp, attrflag, 0); 1213 #endif 1214 if (!error) { 1215 #ifndef NFS_V2_ONLY 1216 if (v3) { 1217 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1218 len = fxdr_unsigned(uint32_t, *tl); 1219 if (len > MAXPATHLEN) { 1220 /* 1221 * this pathname is too long for us. 1222 */ 1223 m_freem(mrep); 1224 /* Solaris returns EINVAL. should we follow? */ 1225 error = ENAMETOOLONG; 1226 goto nfsmout; 1227 } 1228 } else 1229 #endif 1230 { 1231 nfsm_strsiz(len, NFS_MAXPATHLEN); 1232 } 1233 nfsm_mtouio(uiop, len); 1234 } 1235 nfsm_reqdone; 1236 return (error); 1237 } 1238 1239 /* 1240 * nfs read rpc call 1241 * Ditto above 1242 */ 1243 int 1244 nfs_readrpc(vp, uiop) 1245 struct vnode *vp; 1246 struct uio *uiop; 1247 { 1248 u_int32_t *tl; 1249 caddr_t cp; 1250 int32_t t1, t2; 1251 caddr_t bpos, dpos, cp2; 1252 struct mbuf *mreq, *mrep, *md, *mb; 1253 struct nfsmount *nmp; 1254 int error = 0, len, retlen, tsiz, eof, byte_count; 1255 const int v3 = NFS_ISV3(vp); 1256 struct nfsnode *np = VTONFS(vp); 1257 #ifndef NFS_V2_ONLY 1258 int attrflag; 1259 #endif 1260 1261 #ifndef nolint 1262 eof = 0; 1263 #endif 1264 nmp = VFSTONFS(vp->v_mount); 1265 tsiz = uiop->uio_resid; 1266 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1267 return (EFBIG); 1268 iostat_busy(nmp->nm_stats); 1269 byte_count = 0; /* count bytes actually transferred */ 1270 while (tsiz > 0) { 1271 nfsstats.rpccnt[NFSPROC_READ]++; 1272 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1273 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1274 nfsm_fhtom(np, v3); 1275 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1276 #ifndef NFS_V2_ONLY 1277 if (v3) { 1278 txdr_hyper(uiop->uio_offset, tl); 1279 *(tl + 2) = txdr_unsigned(len); 1280 } else 1281 #endif 1282 { 1283 *tl++ = txdr_unsigned(uiop->uio_offset); 1284 *tl++ = txdr_unsigned(len); 1285 *tl = 0; 1286 } 1287 nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); 1288 #ifndef NFS_V2_ONLY 1289 if (v3) { 1290 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1291 if (error) { 1292 m_freem(mrep); 1293 goto nfsmout; 1294 } 1295 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1296 eof = fxdr_unsigned(int, *(tl + 1)); 1297 } else 1298 #endif 1299 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1300 nfsm_strsiz(retlen, nmp->nm_rsize); 1301 nfsm_mtouio(uiop, retlen); 1302 m_freem(mrep); 1303 tsiz -= retlen; 1304 byte_count += retlen; 1305 #ifndef NFS_V2_ONLY 1306 if (v3) { 1307 if (eof || retlen == 0) 1308 tsiz = 0; 1309 } else 1310 #endif 1311 if (retlen < len) 1312 tsiz = 0; 1313 } 1314 nfsmout: 1315 iostat_unbusy(nmp->nm_stats, byte_count, 1); 1316 return (error); 1317 } 1318 1319 struct nfs_writerpc_context { 1320 struct simplelock nwc_slock; 1321 volatile int nwc_mbufcount; 1322 }; 1323 1324 /* 1325 * free mbuf used to refer protected pages while write rpc call. 1326 * called at splvm. 1327 */ 1328 static void 1329 nfs_writerpc_extfree(struct mbuf *m, caddr_t tbuf __unused, 1330 size_t size __unused, void *arg) 1331 { 1332 struct nfs_writerpc_context *ctx = arg; 1333 1334 KASSERT(m != NULL); 1335 KASSERT(ctx != NULL); 1336 pool_cache_put(&mbpool_cache, m); 1337 simple_lock(&ctx->nwc_slock); 1338 if (--ctx->nwc_mbufcount == 0) { 1339 wakeup(ctx); 1340 } 1341 simple_unlock(&ctx->nwc_slock); 1342 } 1343 1344 /* 1345 * nfs write call 1346 */ 1347 int 1348 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1349 struct vnode *vp; 1350 struct uio *uiop; 1351 int *iomode; 1352 boolean_t pageprotected; 1353 boolean_t *stalewriteverfp; 1354 { 1355 u_int32_t *tl; 1356 caddr_t cp; 1357 int32_t t1, t2; 1358 caddr_t bpos, dpos; 1359 struct mbuf *mreq, *mrep, *md, *mb; 1360 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1361 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1362 const int v3 = NFS_ISV3(vp); 1363 int committed = NFSV3WRITE_FILESYNC; 1364 struct nfsnode *np = VTONFS(vp); 1365 struct nfs_writerpc_context ctx; 1366 int s, byte_count; 1367 struct lwp *l = NULL; 1368 size_t origresid; 1369 #ifndef NFS_V2_ONLY 1370 caddr_t cp2; 1371 int rlen, commit; 1372 #endif 1373 1374 simple_lock_init(&ctx.nwc_slock); 1375 ctx.nwc_mbufcount = 1; 1376 1377 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1378 panic("writerpc readonly vp %p", vp); 1379 } 1380 1381 #ifdef DIAGNOSTIC 1382 if (uiop->uio_iovcnt != 1) 1383 panic("nfs: writerpc iovcnt > 1"); 1384 #endif 1385 tsiz = uiop->uio_resid; 1386 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1387 return (EFBIG); 1388 if (pageprotected) { 1389 l = curlwp; 1390 PHOLD(l); 1391 } 1392 retry: 1393 origresid = uiop->uio_resid; 1394 KASSERT(origresid == uiop->uio_iov->iov_len); 1395 iostat_busy(nmp->nm_stats); 1396 byte_count = 0; /* count of bytes actually written */ 1397 while (tsiz > 0) { 1398 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1399 uint32_t backup; 1400 boolean_t stalewriteverf = FALSE; 1401 1402 nfsstats.rpccnt[NFSPROC_WRITE]++; 1403 len = min(tsiz, nmp->nm_wsize); 1404 datalen = pageprotected ? 0 : nfsm_rndup(len); 1405 nfsm_reqhead(np, NFSPROC_WRITE, 1406 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1407 nfsm_fhtom(np, v3); 1408 #ifndef NFS_V2_ONLY 1409 if (v3) { 1410 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1411 txdr_hyper(uiop->uio_offset, tl); 1412 tl += 2; 1413 *tl++ = txdr_unsigned(len); 1414 *tl++ = txdr_unsigned(*iomode); 1415 *tl = txdr_unsigned(len); 1416 } else 1417 #endif 1418 { 1419 u_int32_t x; 1420 1421 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1422 /* Set both "begin" and "current" to non-garbage. */ 1423 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1424 *tl++ = x; /* "begin offset" */ 1425 *tl++ = x; /* "current offset" */ 1426 x = txdr_unsigned(len); 1427 *tl++ = x; /* total to this offset */ 1428 *tl = x; /* size of this write */ 1429 1430 } 1431 if (pageprotected) { 1432 /* 1433 * since we know pages can't be modified during i/o, 1434 * no need to copy them for us. 1435 */ 1436 struct mbuf *m; 1437 struct iovec *iovp = uiop->uio_iov; 1438 1439 m = m_get(M_WAIT, MT_DATA); 1440 MCLAIM(m, &nfs_mowner); 1441 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1442 nfs_writerpc_extfree, &ctx); 1443 m->m_flags |= M_EXT_ROMAP; 1444 m->m_len = len; 1445 mb->m_next = m; 1446 /* 1447 * no need to maintain mb and bpos here 1448 * because no one care them later. 1449 */ 1450 #if 0 1451 mb = m; 1452 bpos = mtod(caddr_t, mb) + mb->m_len; 1453 #endif 1454 UIO_ADVANCE(uiop, len); 1455 uiop->uio_offset += len; 1456 s = splvm(); 1457 simple_lock(&ctx.nwc_slock); 1458 ctx.nwc_mbufcount++; 1459 simple_unlock(&ctx.nwc_slock); 1460 splx(s); 1461 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1462 } else { 1463 nfsm_uiotom(uiop, len); 1464 } 1465 nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); 1466 #ifndef NFS_V2_ONLY 1467 if (v3) { 1468 wccflag = NFSV3_WCCCHK; 1469 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); 1470 if (!error) { 1471 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1472 + NFSX_V3WRITEVERF); 1473 rlen = fxdr_unsigned(int, *tl++); 1474 if (rlen == 0) { 1475 error = NFSERR_IO; 1476 m_freem(mrep); 1477 break; 1478 } else if (rlen < len) { 1479 backup = len - rlen; 1480 UIO_ADVANCE(uiop, -backup); 1481 uiop->uio_offset -= backup; 1482 len = rlen; 1483 } 1484 commit = fxdr_unsigned(int, *tl++); 1485 1486 /* 1487 * Return the lowest committment level 1488 * obtained by any of the RPCs. 1489 */ 1490 if (committed == NFSV3WRITE_FILESYNC) 1491 committed = commit; 1492 else if (committed == NFSV3WRITE_DATASYNC && 1493 commit == NFSV3WRITE_UNSTABLE) 1494 committed = commit; 1495 simple_lock(&nmp->nm_slock); 1496 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1497 memcpy(nmp->nm_writeverf, tl, 1498 NFSX_V3WRITEVERF); 1499 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1500 } else if ((nmp->nm_iflag & 1501 NFSMNT_STALEWRITEVERF) || 1502 memcmp(tl, nmp->nm_writeverf, 1503 NFSX_V3WRITEVERF)) { 1504 memcpy(nmp->nm_writeverf, tl, 1505 NFSX_V3WRITEVERF); 1506 /* 1507 * note NFSMNT_STALEWRITEVERF 1508 * if we're the first thread to 1509 * notice it. 1510 */ 1511 if ((nmp->nm_iflag & 1512 NFSMNT_STALEWRITEVERF) == 0) { 1513 stalewriteverf = TRUE; 1514 nmp->nm_iflag |= 1515 NFSMNT_STALEWRITEVERF; 1516 } 1517 } 1518 simple_unlock(&nmp->nm_slock); 1519 } 1520 } else 1521 #endif 1522 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1523 if (wccflag) 1524 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1525 m_freem(mrep); 1526 if (error) 1527 break; 1528 tsiz -= len; 1529 byte_count += len; 1530 if (stalewriteverf) { 1531 *stalewriteverfp = TRUE; 1532 stalewriteverf = FALSE; 1533 if (committed == NFSV3WRITE_UNSTABLE && 1534 len != origresid) { 1535 /* 1536 * if our write requests weren't atomic but 1537 * unstable, datas in previous iterations 1538 * might have already been lost now. 1539 * then, we should resend them to nfsd. 1540 */ 1541 backup = origresid - tsiz; 1542 UIO_ADVANCE(uiop, -backup); 1543 uiop->uio_offset -= backup; 1544 tsiz = origresid; 1545 goto retry; 1546 } 1547 } 1548 } 1549 nfsmout: 1550 iostat_unbusy(nmp->nm_stats, byte_count, 0); 1551 if (pageprotected) { 1552 /* 1553 * wait until mbufs go away. 1554 * retransmitted mbufs can survive longer than rpc requests 1555 * themselves. 1556 */ 1557 s = splvm(); 1558 simple_lock(&ctx.nwc_slock); 1559 ctx.nwc_mbufcount--; 1560 while (ctx.nwc_mbufcount > 0) { 1561 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1562 } 1563 simple_unlock(&ctx.nwc_slock); 1564 splx(s); 1565 PRELE(l); 1566 } 1567 *iomode = committed; 1568 if (error) 1569 uiop->uio_resid = tsiz; 1570 return (error); 1571 } 1572 1573 /* 1574 * nfs mknod rpc 1575 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1576 * mode set to specify the file type and the size field for rdev. 1577 */ 1578 int 1579 nfs_mknodrpc(dvp, vpp, cnp, vap) 1580 struct vnode *dvp; 1581 struct vnode **vpp; 1582 struct componentname *cnp; 1583 struct vattr *vap; 1584 { 1585 struct nfsv2_sattr *sp; 1586 u_int32_t *tl; 1587 caddr_t cp; 1588 int32_t t1, t2; 1589 struct vnode *newvp = (struct vnode *)0; 1590 struct nfsnode *dnp, *np; 1591 char *cp2; 1592 caddr_t bpos, dpos; 1593 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1594 struct mbuf *mreq, *mrep, *md, *mb; 1595 u_int32_t rdev; 1596 const int v3 = NFS_ISV3(dvp); 1597 1598 if (vap->va_type == VCHR || vap->va_type == VBLK) 1599 rdev = txdr_unsigned(vap->va_rdev); 1600 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1601 rdev = nfs_xdrneg1; 1602 else { 1603 VOP_ABORTOP(dvp, cnp); 1604 vput(dvp); 1605 return (EOPNOTSUPP); 1606 } 1607 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1608 dnp = VTONFS(dvp); 1609 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1610 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1611 nfsm_fhtom(dnp, v3); 1612 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1613 #ifndef NFS_V2_ONLY 1614 if (v3) { 1615 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1616 *tl++ = vtonfsv3_type(vap->va_type); 1617 nfsm_v3attrbuild(vap, FALSE); 1618 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1619 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1620 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1621 *tl = txdr_unsigned(minor(vap->va_rdev)); 1622 } 1623 } else 1624 #endif 1625 { 1626 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1627 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1628 sp->sa_uid = nfs_xdrneg1; 1629 sp->sa_gid = nfs_xdrneg1; 1630 sp->sa_size = rdev; 1631 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1632 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1633 } 1634 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_lwp, cnp->cn_cred); 1635 if (!error) { 1636 nfsm_mtofh(dvp, newvp, v3, gotvp); 1637 if (!gotvp) { 1638 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1639 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1640 if (!error) 1641 newvp = NFSTOV(np); 1642 } 1643 } 1644 #ifndef NFS_V2_ONLY 1645 if (v3) 1646 nfsm_wcc_data(dvp, wccflag, 0, !error); 1647 #endif 1648 nfsm_reqdone; 1649 if (error) { 1650 if (newvp) 1651 vput(newvp); 1652 } else { 1653 if (cnp->cn_flags & MAKEENTRY) 1654 nfs_cache_enter(dvp, newvp, cnp); 1655 *vpp = newvp; 1656 } 1657 PNBUF_PUT(cnp->cn_pnbuf); 1658 VTONFS(dvp)->n_flag |= NMODIFIED; 1659 if (!wccflag) 1660 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1661 vput(dvp); 1662 return (error); 1663 } 1664 1665 /* 1666 * nfs mknod vop 1667 * just call nfs_mknodrpc() to do the work. 1668 */ 1669 /* ARGSUSED */ 1670 int 1671 nfs_mknod(v) 1672 void *v; 1673 { 1674 struct vop_mknod_args /* { 1675 struct vnode *a_dvp; 1676 struct vnode **a_vpp; 1677 struct componentname *a_cnp; 1678 struct vattr *a_vap; 1679 } */ *ap = v; 1680 struct vnode *dvp = ap->a_dvp; 1681 struct componentname *cnp = ap->a_cnp; 1682 int error; 1683 1684 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1685 VN_KNOTE(dvp, NOTE_WRITE); 1686 if (error == 0 || error == EEXIST) 1687 cache_purge1(dvp, cnp, 0); 1688 return (error); 1689 } 1690 1691 #ifndef NFS_V2_ONLY 1692 static u_long create_verf; 1693 #endif 1694 /* 1695 * nfs file create call 1696 */ 1697 int 1698 nfs_create(v) 1699 void *v; 1700 { 1701 struct vop_create_args /* { 1702 struct vnode *a_dvp; 1703 struct vnode **a_vpp; 1704 struct componentname *a_cnp; 1705 struct vattr *a_vap; 1706 } */ *ap = v; 1707 struct vnode *dvp = ap->a_dvp; 1708 struct vattr *vap = ap->a_vap; 1709 struct componentname *cnp = ap->a_cnp; 1710 struct nfsv2_sattr *sp; 1711 u_int32_t *tl; 1712 caddr_t cp; 1713 int32_t t1, t2; 1714 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1715 struct vnode *newvp = (struct vnode *)0; 1716 caddr_t bpos, dpos, cp2; 1717 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1718 struct mbuf *mreq, *mrep, *md, *mb; 1719 const int v3 = NFS_ISV3(dvp); 1720 1721 /* 1722 * Oops, not for me.. 1723 */ 1724 if (vap->va_type == VSOCK) 1725 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1726 1727 KASSERT(vap->va_type == VREG); 1728 1729 #ifdef VA_EXCLUSIVE 1730 if (vap->va_vaflags & VA_EXCLUSIVE) 1731 fmode |= O_EXCL; 1732 #endif 1733 again: 1734 error = 0; 1735 nfsstats.rpccnt[NFSPROC_CREATE]++; 1736 dnp = VTONFS(dvp); 1737 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1738 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1739 nfsm_fhtom(dnp, v3); 1740 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1741 #ifndef NFS_V2_ONLY 1742 if (v3) { 1743 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1744 if (fmode & O_EXCL) { 1745 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1746 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1747 #ifdef INET 1748 if (TAILQ_FIRST(&in_ifaddrhead)) 1749 *tl++ = TAILQ_FIRST(&in_ifaddrhead)-> 1750 ia_addr.sin_addr.s_addr; 1751 else 1752 *tl++ = create_verf; 1753 #else 1754 *tl++ = create_verf; 1755 #endif 1756 *tl = ++create_verf; 1757 } else { 1758 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1759 nfsm_v3attrbuild(vap, FALSE); 1760 } 1761 } else 1762 #endif 1763 { 1764 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1765 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1766 sp->sa_uid = nfs_xdrneg1; 1767 sp->sa_gid = nfs_xdrneg1; 1768 sp->sa_size = 0; 1769 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1770 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1771 } 1772 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_lwp, cnp->cn_cred); 1773 if (!error) { 1774 nfsm_mtofh(dvp, newvp, v3, gotvp); 1775 if (!gotvp) { 1776 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1777 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp, &np); 1778 if (!error) 1779 newvp = NFSTOV(np); 1780 } 1781 } 1782 #ifndef NFS_V2_ONLY 1783 if (v3) 1784 nfsm_wcc_data(dvp, wccflag, 0, !error); 1785 #endif 1786 nfsm_reqdone; 1787 if (error) { 1788 /* 1789 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 1790 */ 1791 if (v3 && (fmode & O_EXCL) && error == ENOTSUP) { 1792 fmode &= ~O_EXCL; 1793 goto again; 1794 } 1795 } else if (v3 && (fmode & O_EXCL)) { 1796 struct timespec ts; 1797 1798 getnanotime(&ts); 1799 1800 /* 1801 * make sure that we'll update timestamps as 1802 * most server implementations use them to store 1803 * the create verifier. 1804 * 1805 * XXX it's better to use TOSERVER always. 1806 */ 1807 1808 if (vap->va_atime.tv_sec == VNOVAL) 1809 vap->va_atime = ts; 1810 if (vap->va_mtime.tv_sec == VNOVAL) 1811 vap->va_mtime = ts; 1812 1813 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_lwp); 1814 } 1815 if (error == 0) { 1816 if (cnp->cn_flags & MAKEENTRY) 1817 nfs_cache_enter(dvp, newvp, cnp); 1818 else 1819 cache_purge1(dvp, cnp, 0); 1820 *ap->a_vpp = newvp; 1821 } else { 1822 if (newvp) 1823 vput(newvp); 1824 if (error == EEXIST) 1825 cache_purge1(dvp, cnp, 0); 1826 } 1827 PNBUF_PUT(cnp->cn_pnbuf); 1828 VTONFS(dvp)->n_flag |= NMODIFIED; 1829 if (!wccflag) 1830 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1831 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1832 vput(dvp); 1833 return (error); 1834 } 1835 1836 /* 1837 * nfs file remove call 1838 * To try and make nfs semantics closer to ufs semantics, a file that has 1839 * other processes using the vnode is renamed instead of removed and then 1840 * removed later on the last close. 1841 * - If v_usecount > 1 1842 * If a rename is not already in the works 1843 * call nfs_sillyrename() to set it up 1844 * else 1845 * do the remove rpc 1846 */ 1847 int 1848 nfs_remove(v) 1849 void *v; 1850 { 1851 struct vop_remove_args /* { 1852 struct vnodeop_desc *a_desc; 1853 struct vnode * a_dvp; 1854 struct vnode * a_vp; 1855 struct componentname * a_cnp; 1856 } */ *ap = v; 1857 struct vnode *vp = ap->a_vp; 1858 struct vnode *dvp = ap->a_dvp; 1859 struct componentname *cnp = ap->a_cnp; 1860 struct nfsnode *np = VTONFS(vp); 1861 int error = 0; 1862 struct vattr vattr; 1863 1864 #ifndef DIAGNOSTIC 1865 if ((cnp->cn_flags & HASBUF) == 0) 1866 panic("nfs_remove: no name"); 1867 if (vp->v_usecount < 1) 1868 panic("nfs_remove: bad v_usecount"); 1869 #endif 1870 if (vp->v_type == VDIR) 1871 error = EPERM; 1872 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1873 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_lwp) == 0 && 1874 vattr.va_nlink > 1)) { 1875 /* 1876 * Purge the name cache so that the chance of a lookup for 1877 * the name succeeding while the remove is in progress is 1878 * minimized. Without node locking it can still happen, such 1879 * that an I/O op returns ESTALE, but since you get this if 1880 * another host removes the file.. 1881 */ 1882 cache_purge(vp); 1883 /* 1884 * throw away biocache buffers, mainly to avoid 1885 * unnecessary delayed writes later. 1886 */ 1887 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_lwp, 1); 1888 /* Do the rpc */ 1889 if (error != EINTR) 1890 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1891 cnp->cn_namelen, cnp->cn_cred, cnp->cn_lwp); 1892 } else if (!np->n_sillyrename) 1893 error = nfs_sillyrename(dvp, vp, cnp, FALSE); 1894 PNBUF_PUT(cnp->cn_pnbuf); 1895 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1896 vattr.va_nlink == 1) { 1897 np->n_flag |= NREMOVED; 1898 } 1899 NFS_INVALIDATE_ATTRCACHE(np); 1900 VN_KNOTE(vp, NOTE_DELETE); 1901 VN_KNOTE(dvp, NOTE_WRITE); 1902 if (dvp == vp) 1903 vrele(vp); 1904 else 1905 vput(vp); 1906 vput(dvp); 1907 return (error); 1908 } 1909 1910 /* 1911 * nfs file remove rpc called from nfs_inactive 1912 */ 1913 int 1914 nfs_removeit(sp) 1915 struct sillyrename *sp; 1916 { 1917 1918 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1919 (struct lwp *)0)); 1920 } 1921 1922 /* 1923 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1924 */ 1925 int 1926 nfs_removerpc(dvp, name, namelen, cred, l) 1927 struct vnode *dvp; 1928 const char *name; 1929 int namelen; 1930 kauth_cred_t cred; 1931 struct lwp *l; 1932 { 1933 u_int32_t *tl; 1934 caddr_t cp; 1935 #ifndef NFS_V2_ONLY 1936 int32_t t1; 1937 caddr_t cp2; 1938 #endif 1939 int32_t t2; 1940 caddr_t bpos, dpos; 1941 int error = 0, wccflag = NFSV3_WCCRATTR; 1942 struct mbuf *mreq, *mrep, *md, *mb; 1943 const int v3 = NFS_ISV3(dvp); 1944 int rexmit = 0; 1945 struct nfsnode *dnp = VTONFS(dvp); 1946 1947 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1948 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1949 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1950 nfsm_fhtom(dnp, v3); 1951 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1952 nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); 1953 #ifndef NFS_V2_ONLY 1954 if (v3) 1955 nfsm_wcc_data(dvp, wccflag, 0, !error); 1956 #endif 1957 nfsm_reqdone; 1958 VTONFS(dvp)->n_flag |= NMODIFIED; 1959 if (!wccflag) 1960 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1961 /* 1962 * Kludge City: If the first reply to the remove rpc is lost.. 1963 * the reply to the retransmitted request will be ENOENT 1964 * since the file was in fact removed 1965 * Therefore, we cheat and return success. 1966 */ 1967 if (rexmit && error == ENOENT) 1968 error = 0; 1969 return (error); 1970 } 1971 1972 /* 1973 * nfs file rename call 1974 */ 1975 int 1976 nfs_rename(v) 1977 void *v; 1978 { 1979 struct vop_rename_args /* { 1980 struct vnode *a_fdvp; 1981 struct vnode *a_fvp; 1982 struct componentname *a_fcnp; 1983 struct vnode *a_tdvp; 1984 struct vnode *a_tvp; 1985 struct componentname *a_tcnp; 1986 } */ *ap = v; 1987 struct vnode *fvp = ap->a_fvp; 1988 struct vnode *tvp = ap->a_tvp; 1989 struct vnode *fdvp = ap->a_fdvp; 1990 struct vnode *tdvp = ap->a_tdvp; 1991 struct componentname *tcnp = ap->a_tcnp; 1992 struct componentname *fcnp = ap->a_fcnp; 1993 int error; 1994 1995 #ifndef DIAGNOSTIC 1996 if ((tcnp->cn_flags & HASBUF) == 0 || 1997 (fcnp->cn_flags & HASBUF) == 0) 1998 panic("nfs_rename: no name"); 1999 #endif 2000 /* Check for cross-device rename */ 2001 if ((fvp->v_mount != tdvp->v_mount) || 2002 (tvp && (fvp->v_mount != tvp->v_mount))) { 2003 error = EXDEV; 2004 goto out; 2005 } 2006 2007 /* 2008 * If the tvp exists and is in use, sillyrename it before doing the 2009 * rename of the new file over it. 2010 * 2011 * Have sillyrename use link instead of rename if possible, 2012 * so that we don't lose the file if the rename fails, and so 2013 * that there's no window when the "to" file doesn't exist. 2014 */ 2015 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 2016 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp, TRUE)) { 2017 VN_KNOTE(tvp, NOTE_DELETE); 2018 vput(tvp); 2019 tvp = NULL; 2020 } 2021 2022 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 2023 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 2024 tcnp->cn_lwp); 2025 2026 VN_KNOTE(fdvp, NOTE_WRITE); 2027 VN_KNOTE(tdvp, NOTE_WRITE); 2028 if (error == 0 || error == EEXIST) { 2029 if (fvp->v_type == VDIR) 2030 cache_purge(fvp); 2031 else 2032 cache_purge1(fdvp, fcnp, 0); 2033 if (tvp != NULL && tvp->v_type == VDIR) 2034 cache_purge(tvp); 2035 else 2036 cache_purge1(tdvp, tcnp, 0); 2037 } 2038 out: 2039 if (tdvp == tvp) 2040 vrele(tdvp); 2041 else 2042 vput(tdvp); 2043 if (tvp) 2044 vput(tvp); 2045 vrele(fdvp); 2046 vrele(fvp); 2047 return (error); 2048 } 2049 2050 /* 2051 * nfs file rename rpc called from nfs_remove() above 2052 */ 2053 int 2054 nfs_renameit(sdvp, scnp, sp) 2055 struct vnode *sdvp; 2056 struct componentname *scnp; 2057 struct sillyrename *sp; 2058 { 2059 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2060 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_lwp)); 2061 } 2062 2063 /* 2064 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2065 */ 2066 int 2067 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, l) 2068 struct vnode *fdvp; 2069 const char *fnameptr; 2070 int fnamelen; 2071 struct vnode *tdvp; 2072 const char *tnameptr; 2073 int tnamelen; 2074 kauth_cred_t cred; 2075 struct lwp *l; 2076 { 2077 u_int32_t *tl; 2078 caddr_t cp; 2079 #ifndef NFS_V2_ONLY 2080 int32_t t1; 2081 caddr_t cp2; 2082 #endif 2083 int32_t t2; 2084 caddr_t bpos, dpos; 2085 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2086 struct mbuf *mreq, *mrep, *md, *mb; 2087 const int v3 = NFS_ISV3(fdvp); 2088 int rexmit = 0; 2089 struct nfsnode *fdnp = VTONFS(fdvp); 2090 2091 nfsstats.rpccnt[NFSPROC_RENAME]++; 2092 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2093 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2094 nfsm_rndup(tnamelen)); 2095 nfsm_fhtom(fdnp, v3); 2096 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2097 nfsm_fhtom(VTONFS(tdvp), v3); 2098 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2099 nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); 2100 #ifndef NFS_V2_ONLY 2101 if (v3) { 2102 nfsm_wcc_data(fdvp, fwccflag, 0, !error); 2103 nfsm_wcc_data(tdvp, twccflag, 0, !error); 2104 } 2105 #endif 2106 nfsm_reqdone; 2107 VTONFS(fdvp)->n_flag |= NMODIFIED; 2108 VTONFS(tdvp)->n_flag |= NMODIFIED; 2109 if (!fwccflag) 2110 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2111 if (!twccflag) 2112 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2113 /* 2114 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2115 */ 2116 if (rexmit && error == ENOENT) 2117 error = 0; 2118 return (error); 2119 } 2120 2121 /* 2122 * NFS link RPC, called from nfs_link. 2123 * Assumes dvp and vp locked, and leaves them that way. 2124 */ 2125 2126 static int 2127 nfs_linkrpc(struct vnode *dvp, struct vnode *vp, const char *name, 2128 size_t namelen, kauth_cred_t cred, struct lwp *l) 2129 { 2130 u_int32_t *tl; 2131 caddr_t cp; 2132 #ifndef NFS_V2_ONLY 2133 int32_t t1; 2134 caddr_t cp2; 2135 #endif 2136 int32_t t2; 2137 caddr_t bpos, dpos; 2138 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2139 struct mbuf *mreq, *mrep, *md, *mb; 2140 const int v3 = NFS_ISV3(dvp); 2141 int rexmit = 0; 2142 struct nfsnode *np = VTONFS(vp); 2143 2144 nfsstats.rpccnt[NFSPROC_LINK]++; 2145 nfsm_reqhead(np, NFSPROC_LINK, 2146 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(namelen)); 2147 nfsm_fhtom(np, v3); 2148 nfsm_fhtom(VTONFS(dvp), v3); 2149 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 2150 nfsm_request1(np, NFSPROC_LINK, l, cred, &rexmit); 2151 #ifndef NFS_V2_ONLY 2152 if (v3) { 2153 nfsm_postop_attr(vp, attrflag, 0); 2154 nfsm_wcc_data(dvp, wccflag, 0, !error); 2155 } 2156 #endif 2157 nfsm_reqdone; 2158 2159 VTONFS(dvp)->n_flag |= NMODIFIED; 2160 if (!attrflag) 2161 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2162 if (!wccflag) 2163 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2164 2165 /* 2166 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2167 */ 2168 if (rexmit && error == EEXIST) 2169 error = 0; 2170 2171 return error; 2172 } 2173 2174 /* 2175 * nfs hard link create call 2176 */ 2177 int 2178 nfs_link(v) 2179 void *v; 2180 { 2181 struct vop_link_args /* { 2182 struct vnode *a_dvp; 2183 struct vnode *a_vp; 2184 struct componentname *a_cnp; 2185 } */ *ap = v; 2186 struct vnode *vp = ap->a_vp; 2187 struct vnode *dvp = ap->a_dvp; 2188 struct componentname *cnp = ap->a_cnp; 2189 int error = 0; 2190 2191 if (dvp->v_mount != vp->v_mount) { 2192 VOP_ABORTOP(dvp, cnp); 2193 vput(dvp); 2194 return (EXDEV); 2195 } 2196 if (dvp != vp) { 2197 error = vn_lock(vp, LK_EXCLUSIVE); 2198 if (error != 0) { 2199 VOP_ABORTOP(dvp, cnp); 2200 vput(dvp); 2201 return error; 2202 } 2203 } 2204 2205 /* 2206 * Push all writes to the server, so that the attribute cache 2207 * doesn't get "out of sync" with the server. 2208 * XXX There should be a better way! 2209 */ 2210 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_lwp); 2211 2212 error = nfs_linkrpc(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 2213 cnp->cn_cred, cnp->cn_lwp); 2214 2215 if (error == 0) 2216 cache_purge1(dvp, cnp, 0); 2217 PNBUF_PUT(cnp->cn_pnbuf); 2218 if (dvp != vp) 2219 VOP_UNLOCK(vp, 0); 2220 VN_KNOTE(vp, NOTE_LINK); 2221 VN_KNOTE(dvp, NOTE_WRITE); 2222 vput(dvp); 2223 return (error); 2224 } 2225 2226 /* 2227 * nfs symbolic link create call 2228 */ 2229 int 2230 nfs_symlink(v) 2231 void *v; 2232 { 2233 struct vop_symlink_args /* { 2234 struct vnode *a_dvp; 2235 struct vnode **a_vpp; 2236 struct componentname *a_cnp; 2237 struct vattr *a_vap; 2238 char *a_target; 2239 } */ *ap = v; 2240 struct vnode *dvp = ap->a_dvp; 2241 struct vattr *vap = ap->a_vap; 2242 struct componentname *cnp = ap->a_cnp; 2243 struct nfsv2_sattr *sp; 2244 u_int32_t *tl; 2245 caddr_t cp; 2246 int32_t t1, t2; 2247 caddr_t bpos, dpos, cp2; 2248 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2249 struct mbuf *mreq, *mrep, *md, *mb; 2250 struct vnode *newvp = (struct vnode *)0; 2251 const int v3 = NFS_ISV3(dvp); 2252 int rexmit = 0; 2253 struct nfsnode *dnp = VTONFS(dvp); 2254 2255 *ap->a_vpp = NULL; 2256 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2257 slen = strlen(ap->a_target); 2258 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2259 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2260 nfsm_fhtom(dnp, v3); 2261 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2262 #ifndef NFS_V2_ONlY 2263 if (v3) 2264 nfsm_v3attrbuild(vap, FALSE); 2265 #endif 2266 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2267 #ifndef NFS_V2_ONlY 2268 if (!v3) { 2269 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2270 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2271 sp->sa_uid = nfs_xdrneg1; 2272 sp->sa_gid = nfs_xdrneg1; 2273 sp->sa_size = nfs_xdrneg1; 2274 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2275 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2276 } 2277 #endif 2278 nfsm_request1(dnp, NFSPROC_SYMLINK, cnp->cn_lwp, cnp->cn_cred, 2279 &rexmit); 2280 #ifndef NFS_V2_ONlY 2281 if (v3) { 2282 if (!error) 2283 nfsm_mtofh(dvp, newvp, v3, gotvp); 2284 nfsm_wcc_data(dvp, wccflag, 0, !error); 2285 } 2286 #endif 2287 nfsm_reqdone; 2288 /* 2289 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2290 */ 2291 if (rexmit && error == EEXIST) 2292 error = 0; 2293 if (error == 0 || error == EEXIST) 2294 cache_purge1(dvp, cnp, 0); 2295 if (error == 0 && newvp == NULL) { 2296 struct nfsnode *np = NULL; 2297 2298 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2299 cnp->cn_cred, cnp->cn_lwp, &np); 2300 if (error == 0) 2301 newvp = NFSTOV(np); 2302 } 2303 if (error) { 2304 if (newvp != NULL) 2305 vput(newvp); 2306 } else { 2307 *ap->a_vpp = newvp; 2308 } 2309 PNBUF_PUT(cnp->cn_pnbuf); 2310 VTONFS(dvp)->n_flag |= NMODIFIED; 2311 if (!wccflag) 2312 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2313 VN_KNOTE(dvp, NOTE_WRITE); 2314 vput(dvp); 2315 return (error); 2316 } 2317 2318 /* 2319 * nfs make dir call 2320 */ 2321 int 2322 nfs_mkdir(v) 2323 void *v; 2324 { 2325 struct vop_mkdir_args /* { 2326 struct vnode *a_dvp; 2327 struct vnode **a_vpp; 2328 struct componentname *a_cnp; 2329 struct vattr *a_vap; 2330 } */ *ap = v; 2331 struct vnode *dvp = ap->a_dvp; 2332 struct vattr *vap = ap->a_vap; 2333 struct componentname *cnp = ap->a_cnp; 2334 struct nfsv2_sattr *sp; 2335 u_int32_t *tl; 2336 caddr_t cp; 2337 int32_t t1, t2; 2338 int len; 2339 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2340 struct vnode *newvp = (struct vnode *)0; 2341 caddr_t bpos, dpos, cp2; 2342 int error = 0, wccflag = NFSV3_WCCRATTR; 2343 int gotvp = 0; 2344 int rexmit = 0; 2345 struct mbuf *mreq, *mrep, *md, *mb; 2346 const int v3 = NFS_ISV3(dvp); 2347 2348 len = cnp->cn_namelen; 2349 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2350 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2351 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2352 nfsm_fhtom(dnp, v3); 2353 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2354 #ifndef NFS_V2_ONLY 2355 if (v3) { 2356 nfsm_v3attrbuild(vap, FALSE); 2357 } else 2358 #endif 2359 { 2360 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2361 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2362 sp->sa_uid = nfs_xdrneg1; 2363 sp->sa_gid = nfs_xdrneg1; 2364 sp->sa_size = nfs_xdrneg1; 2365 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2366 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2367 } 2368 nfsm_request1(dnp, NFSPROC_MKDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2369 if (!error) 2370 nfsm_mtofh(dvp, newvp, v3, gotvp); 2371 if (v3) 2372 nfsm_wcc_data(dvp, wccflag, 0, !error); 2373 nfsm_reqdone; 2374 VTONFS(dvp)->n_flag |= NMODIFIED; 2375 if (!wccflag) 2376 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2377 /* 2378 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2379 * if we can succeed in looking up the directory. 2380 */ 2381 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2382 if (newvp) { 2383 vput(newvp); 2384 newvp = (struct vnode *)0; 2385 } 2386 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2387 cnp->cn_lwp, &np); 2388 if (!error) { 2389 newvp = NFSTOV(np); 2390 if (newvp->v_type != VDIR || newvp == dvp) 2391 error = EEXIST; 2392 } 2393 } 2394 if (error) { 2395 if (newvp) { 2396 if (dvp != newvp) 2397 vput(newvp); 2398 else 2399 vrele(newvp); 2400 } 2401 } else { 2402 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2403 if (cnp->cn_flags & MAKEENTRY) 2404 nfs_cache_enter(dvp, newvp, cnp); 2405 *ap->a_vpp = newvp; 2406 } 2407 PNBUF_PUT(cnp->cn_pnbuf); 2408 vput(dvp); 2409 return (error); 2410 } 2411 2412 /* 2413 * nfs remove directory call 2414 */ 2415 int 2416 nfs_rmdir(v) 2417 void *v; 2418 { 2419 struct vop_rmdir_args /* { 2420 struct vnode *a_dvp; 2421 struct vnode *a_vp; 2422 struct componentname *a_cnp; 2423 } */ *ap = v; 2424 struct vnode *vp = ap->a_vp; 2425 struct vnode *dvp = ap->a_dvp; 2426 struct componentname *cnp = ap->a_cnp; 2427 u_int32_t *tl; 2428 caddr_t cp; 2429 #ifndef NFS_V2_ONLY 2430 int32_t t1; 2431 caddr_t cp2; 2432 #endif 2433 int32_t t2; 2434 caddr_t bpos, dpos; 2435 int error = 0, wccflag = NFSV3_WCCRATTR; 2436 int rexmit = 0; 2437 struct mbuf *mreq, *mrep, *md, *mb; 2438 const int v3 = NFS_ISV3(dvp); 2439 struct nfsnode *dnp; 2440 2441 if (dvp == vp) { 2442 vrele(dvp); 2443 vput(dvp); 2444 PNBUF_PUT(cnp->cn_pnbuf); 2445 return (EINVAL); 2446 } 2447 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2448 dnp = VTONFS(dvp); 2449 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2450 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2451 nfsm_fhtom(dnp, v3); 2452 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2453 nfsm_request1(dnp, NFSPROC_RMDIR, cnp->cn_lwp, cnp->cn_cred, &rexmit); 2454 #ifndef NFS_V2_ONLY 2455 if (v3) 2456 nfsm_wcc_data(dvp, wccflag, 0, !error); 2457 #endif 2458 nfsm_reqdone; 2459 PNBUF_PUT(cnp->cn_pnbuf); 2460 VTONFS(dvp)->n_flag |= NMODIFIED; 2461 if (!wccflag) 2462 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2463 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2464 VN_KNOTE(vp, NOTE_DELETE); 2465 cache_purge(vp); 2466 vput(vp); 2467 vput(dvp); 2468 /* 2469 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2470 */ 2471 if (rexmit && error == ENOENT) 2472 error = 0; 2473 return (error); 2474 } 2475 2476 /* 2477 * nfs readdir call 2478 */ 2479 int 2480 nfs_readdir(v) 2481 void *v; 2482 { 2483 struct vop_readdir_args /* { 2484 struct vnode *a_vp; 2485 struct uio *a_uio; 2486 kauth_cred_t a_cred; 2487 int *a_eofflag; 2488 off_t **a_cookies; 2489 int *a_ncookies; 2490 } */ *ap = v; 2491 struct vnode *vp = ap->a_vp; 2492 struct uio *uio = ap->a_uio; 2493 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2494 char *base = uio->uio_iov->iov_base; 2495 int tresid, error; 2496 size_t count, lost; 2497 struct dirent *dp; 2498 off_t *cookies = NULL; 2499 int ncookies = 0, nc; 2500 2501 if (vp->v_type != VDIR) 2502 return (EPERM); 2503 2504 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2505 count = uio->uio_resid - lost; 2506 if (count <= 0) 2507 return (EINVAL); 2508 2509 /* 2510 * Call nfs_bioread() to do the real work. 2511 */ 2512 tresid = uio->uio_resid = count; 2513 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2514 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2515 2516 if (!error && ap->a_cookies) { 2517 ncookies = count / 16; 2518 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2519 *ap->a_cookies = cookies; 2520 } 2521 2522 if (!error && uio->uio_resid == tresid) { 2523 uio->uio_resid += lost; 2524 nfsstats.direofcache_misses++; 2525 if (ap->a_cookies) 2526 *ap->a_ncookies = 0; 2527 *ap->a_eofflag = 1; 2528 return (0); 2529 } 2530 2531 if (!error && ap->a_cookies) { 2532 /* 2533 * Only the NFS server and emulations use cookies, and they 2534 * load the directory block into system space, so we can 2535 * just look at it directly. 2536 */ 2537 if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || 2538 uio->uio_iovcnt != 1) 2539 panic("nfs_readdir: lost in space"); 2540 for (nc = 0; ncookies-- && 2541 base < (char *)uio->uio_iov->iov_base; nc++){ 2542 dp = (struct dirent *) base; 2543 if (dp->d_reclen == 0) 2544 break; 2545 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2546 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2547 else 2548 *(cookies++) = NFS_GETCOOKIE(dp); 2549 base += dp->d_reclen; 2550 } 2551 uio->uio_resid += 2552 ((caddr_t)uio->uio_iov->iov_base - base); 2553 uio->uio_iov->iov_len += 2554 ((caddr_t)uio->uio_iov->iov_base - base); 2555 uio->uio_iov->iov_base = base; 2556 *ap->a_ncookies = nc; 2557 } 2558 2559 uio->uio_resid += lost; 2560 *ap->a_eofflag = 0; 2561 return (error); 2562 } 2563 2564 /* 2565 * Readdir rpc call. 2566 * Called from below the buffer cache by nfs_doio(). 2567 */ 2568 int 2569 nfs_readdirrpc(vp, uiop, cred) 2570 struct vnode *vp; 2571 struct uio *uiop; 2572 kauth_cred_t cred; 2573 { 2574 int len, left; 2575 struct dirent *dp = NULL; 2576 u_int32_t *tl; 2577 caddr_t cp; 2578 int32_t t1, t2; 2579 caddr_t bpos, dpos, cp2; 2580 struct mbuf *mreq, *mrep, *md, *mb; 2581 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2582 struct nfsnode *dnp = VTONFS(vp); 2583 u_quad_t fileno; 2584 int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; 2585 #ifndef NFS_V2_ONLY 2586 int attrflag; 2587 #endif 2588 int nrpcs = 0, reclen; 2589 const int v3 = NFS_ISV3(vp); 2590 2591 #ifdef DIAGNOSTIC 2592 /* 2593 * Should be called from buffer cache, so only amount of 2594 * NFS_DIRBLKSIZ will be requested. 2595 */ 2596 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2597 panic("nfs readdirrpc bad uio"); 2598 #endif 2599 2600 /* 2601 * Loop around doing readdir rpc's of size nm_readdirsize 2602 * truncated to a multiple of NFS_DIRFRAGSIZ. 2603 * The stopping criteria is EOF or buffer full. 2604 */ 2605 while (more_dirs && bigenough) { 2606 /* 2607 * Heuristic: don't bother to do another RPC to further 2608 * fill up this block if there is not much room left. (< 50% 2609 * of the readdir RPC size). This wastes some buffer space 2610 * but can save up to 50% in RPC calls. 2611 */ 2612 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2613 bigenough = 0; 2614 break; 2615 } 2616 nfsstats.rpccnt[NFSPROC_READDIR]++; 2617 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2618 NFSX_READDIR(v3)); 2619 nfsm_fhtom(dnp, v3); 2620 #ifndef NFS_V2_ONLY 2621 if (v3) { 2622 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2623 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2624 txdr_swapcookie3(uiop->uio_offset, tl); 2625 } else { 2626 txdr_cookie3(uiop->uio_offset, tl); 2627 } 2628 tl += 2; 2629 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2630 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2631 } else 2632 #endif 2633 { 2634 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2635 *tl++ = txdr_unsigned(uiop->uio_offset); 2636 } 2637 *tl = txdr_unsigned(nmp->nm_readdirsize); 2638 nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); 2639 nrpcs++; 2640 #ifndef NFS_V2_ONLY 2641 if (v3) { 2642 nfsm_postop_attr(vp, attrflag, 0); 2643 if (!error) { 2644 nfsm_dissect(tl, u_int32_t *, 2645 2 * NFSX_UNSIGNED); 2646 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2647 dnp->n_cookieverf.nfsuquad[1] = *tl; 2648 } else { 2649 m_freem(mrep); 2650 goto nfsmout; 2651 } 2652 } 2653 #endif 2654 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2655 more_dirs = fxdr_unsigned(int, *tl); 2656 2657 /* loop thru the dir entries, doctoring them to 4bsd form */ 2658 while (more_dirs && bigenough) { 2659 #ifndef NFS_V2_ONLY 2660 if (v3) { 2661 nfsm_dissect(tl, u_int32_t *, 2662 3 * NFSX_UNSIGNED); 2663 fileno = fxdr_hyper(tl); 2664 len = fxdr_unsigned(int, *(tl + 2)); 2665 } else 2666 #endif 2667 { 2668 nfsm_dissect(tl, u_int32_t *, 2669 2 * NFSX_UNSIGNED); 2670 fileno = fxdr_unsigned(u_quad_t, *tl++); 2671 len = fxdr_unsigned(int, *tl); 2672 } 2673 if (len <= 0 || len > NFS_MAXNAMLEN) { 2674 error = EBADRPC; 2675 m_freem(mrep); 2676 goto nfsmout; 2677 } 2678 /* for cookie stashing */ 2679 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2680 left = NFS_DIRFRAGSIZ - blksiz; 2681 if (reclen > left) { 2682 memset(uiop->uio_iov->iov_base, 0, left); 2683 dp->d_reclen += left; 2684 UIO_ADVANCE(uiop, left); 2685 blksiz = 0; 2686 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2687 } 2688 if (reclen > uiop->uio_resid) 2689 bigenough = 0; 2690 if (bigenough) { 2691 int tlen; 2692 2693 dp = (struct dirent *)uiop->uio_iov->iov_base; 2694 dp->d_fileno = fileno; 2695 dp->d_namlen = len; 2696 dp->d_reclen = reclen; 2697 dp->d_type = DT_UNKNOWN; 2698 blksiz += reclen; 2699 if (blksiz == NFS_DIRFRAGSIZ) 2700 blksiz = 0; 2701 UIO_ADVANCE(uiop, DIRHDSIZ); 2702 nfsm_mtouio(uiop, len); 2703 tlen = reclen - (DIRHDSIZ + len); 2704 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2705 UIO_ADVANCE(uiop, tlen); 2706 } else 2707 nfsm_adv(nfsm_rndup(len)); 2708 #ifndef NFS_V2_ONLY 2709 if (v3) { 2710 nfsm_dissect(tl, u_int32_t *, 2711 3 * NFSX_UNSIGNED); 2712 } else 2713 #endif 2714 { 2715 nfsm_dissect(tl, u_int32_t *, 2716 2 * NFSX_UNSIGNED); 2717 } 2718 if (bigenough) { 2719 #ifndef NFS_V2_ONLY 2720 if (v3) { 2721 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2722 uiop->uio_offset = 2723 fxdr_swapcookie3(tl); 2724 else 2725 uiop->uio_offset = 2726 fxdr_cookie3(tl); 2727 } 2728 else 2729 #endif 2730 { 2731 uiop->uio_offset = 2732 fxdr_unsigned(off_t, *tl); 2733 } 2734 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2735 } 2736 if (v3) 2737 tl += 2; 2738 else 2739 tl++; 2740 more_dirs = fxdr_unsigned(int, *tl); 2741 } 2742 /* 2743 * If at end of rpc data, get the eof boolean 2744 */ 2745 if (!more_dirs) { 2746 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2747 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2748 2749 /* 2750 * kludge: if we got no entries, treat it as EOF. 2751 * some server sometimes send a reply without any 2752 * entries or EOF. 2753 * although it might mean the server has very long name, 2754 * we can't handle such entries anyway. 2755 */ 2756 2757 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2758 more_dirs = 0; 2759 } 2760 m_freem(mrep); 2761 } 2762 /* 2763 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2764 * by increasing d_reclen for the last record. 2765 */ 2766 if (blksiz > 0) { 2767 left = NFS_DIRFRAGSIZ - blksiz; 2768 memset(uiop->uio_iov->iov_base, 0, left); 2769 dp->d_reclen += left; 2770 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2771 UIO_ADVANCE(uiop, left); 2772 } 2773 2774 /* 2775 * We are now either at the end of the directory or have filled the 2776 * block. 2777 */ 2778 if (bigenough) { 2779 dnp->n_direofoffset = uiop->uio_offset; 2780 dnp->n_flag |= NEOFVALID; 2781 } 2782 nfsmout: 2783 return (error); 2784 } 2785 2786 #ifndef NFS_V2_ONLY 2787 /* 2788 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2789 */ 2790 int 2791 nfs_readdirplusrpc(vp, uiop, cred) 2792 struct vnode *vp; 2793 struct uio *uiop; 2794 kauth_cred_t cred; 2795 { 2796 int len, left; 2797 struct dirent *dp = NULL; 2798 u_int32_t *tl; 2799 caddr_t cp; 2800 int32_t t1, t2; 2801 struct vnode *newvp; 2802 caddr_t bpos, dpos, cp2; 2803 struct mbuf *mreq, *mrep, *md, *mb; 2804 struct nameidata nami, *ndp = &nami; 2805 struct componentname *cnp = &ndp->ni_cnd; 2806 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2807 struct nfsnode *dnp = VTONFS(vp), *np; 2808 nfsfh_t *fhp; 2809 u_quad_t fileno; 2810 int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2811 int attrflag, fhsize, nrpcs = 0, reclen; 2812 struct nfs_fattr fattr, *fp; 2813 2814 #ifdef DIAGNOSTIC 2815 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2816 panic("nfs readdirplusrpc bad uio"); 2817 #endif 2818 ndp->ni_dvp = vp; 2819 newvp = NULLVP; 2820 2821 /* 2822 * Loop around doing readdir rpc's of size nm_readdirsize 2823 * truncated to a multiple of NFS_DIRFRAGSIZ. 2824 * The stopping criteria is EOF or buffer full. 2825 */ 2826 while (more_dirs && bigenough) { 2827 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2828 bigenough = 0; 2829 break; 2830 } 2831 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2832 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2833 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2834 nfsm_fhtom(dnp, 1); 2835 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2836 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2837 txdr_swapcookie3(uiop->uio_offset, tl); 2838 } else { 2839 txdr_cookie3(uiop->uio_offset, tl); 2840 } 2841 tl += 2; 2842 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2843 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2844 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2845 *tl = txdr_unsigned(nmp->nm_rsize); 2846 nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); 2847 nfsm_postop_attr(vp, attrflag, 0); 2848 if (error) { 2849 m_freem(mrep); 2850 goto nfsmout; 2851 } 2852 nrpcs++; 2853 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2854 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2855 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2856 more_dirs = fxdr_unsigned(int, *tl); 2857 2858 /* loop thru the dir entries, doctoring them to 4bsd form */ 2859 while (more_dirs && bigenough) { 2860 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2861 fileno = fxdr_hyper(tl); 2862 len = fxdr_unsigned(int, *(tl + 2)); 2863 if (len <= 0 || len > NFS_MAXNAMLEN) { 2864 error = EBADRPC; 2865 m_freem(mrep); 2866 goto nfsmout; 2867 } 2868 /* for cookie stashing */ 2869 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2870 left = NFS_DIRFRAGSIZ - blksiz; 2871 if (reclen > left) { 2872 /* 2873 * DIRFRAGSIZ is aligned, no need to align 2874 * again here. 2875 */ 2876 memset(uiop->uio_iov->iov_base, 0, left); 2877 dp->d_reclen += left; 2878 UIO_ADVANCE(uiop, left); 2879 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2880 blksiz = 0; 2881 } 2882 if (reclen > uiop->uio_resid) 2883 bigenough = 0; 2884 if (bigenough) { 2885 int tlen; 2886 2887 dp = (struct dirent *)uiop->uio_iov->iov_base; 2888 dp->d_fileno = fileno; 2889 dp->d_namlen = len; 2890 dp->d_reclen = reclen; 2891 dp->d_type = DT_UNKNOWN; 2892 blksiz += reclen; 2893 if (blksiz == NFS_DIRFRAGSIZ) 2894 blksiz = 0; 2895 UIO_ADVANCE(uiop, DIRHDSIZ); 2896 nfsm_mtouio(uiop, len); 2897 tlen = reclen - (DIRHDSIZ + len); 2898 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2899 UIO_ADVANCE(uiop, tlen); 2900 cnp->cn_nameptr = dp->d_name; 2901 cnp->cn_namelen = dp->d_namlen; 2902 } else 2903 nfsm_adv(nfsm_rndup(len)); 2904 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2905 if (bigenough) { 2906 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2907 uiop->uio_offset = 2908 fxdr_swapcookie3(tl); 2909 else 2910 uiop->uio_offset = 2911 fxdr_cookie3(tl); 2912 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2913 } 2914 tl += 2; 2915 2916 /* 2917 * Since the attributes are before the file handle 2918 * (sigh), we must skip over the attributes and then 2919 * come back and get them. 2920 */ 2921 attrflag = fxdr_unsigned(int, *tl); 2922 if (attrflag) { 2923 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2924 memcpy(&fattr, fp, NFSX_V3FATTR); 2925 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2926 doit = fxdr_unsigned(int, *tl); 2927 if (doit) { 2928 nfsm_getfh(fhp, fhsize, 1); 2929 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2930 VREF(vp); 2931 newvp = vp; 2932 np = dnp; 2933 } else { 2934 error = nfs_nget1(vp->v_mount, fhp, 2935 fhsize, &np, LK_NOWAIT); 2936 if (!error) 2937 newvp = NFSTOV(np); 2938 } 2939 if (!error) { 2940 const char *xcp; 2941 2942 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2943 if (bigenough) { 2944 dp->d_type = 2945 IFTODT(VTTOIF(np->n_vattr->va_type)); 2946 if (cnp->cn_namelen <= NCHNAMLEN) { 2947 ndp->ni_vp = newvp; 2948 xcp = cnp->cn_nameptr + 2949 cnp->cn_namelen; 2950 cnp->cn_hash = 2951 namei_hash(cnp->cn_nameptr, &xcp); 2952 nfs_cache_enter(ndp->ni_dvp, 2953 ndp->ni_vp, cnp); 2954 } 2955 } 2956 } 2957 error = 0; 2958 } 2959 } else { 2960 /* Just skip over the file handle */ 2961 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2962 i = fxdr_unsigned(int, *tl); 2963 nfsm_adv(nfsm_rndup(i)); 2964 } 2965 if (newvp != NULLVP) { 2966 if (newvp == vp) 2967 vrele(newvp); 2968 else 2969 vput(newvp); 2970 newvp = NULLVP; 2971 } 2972 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2973 more_dirs = fxdr_unsigned(int, *tl); 2974 } 2975 /* 2976 * If at end of rpc data, get the eof boolean 2977 */ 2978 if (!more_dirs) { 2979 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2980 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2981 2982 /* 2983 * kludge: see a comment in nfs_readdirrpc. 2984 */ 2985 2986 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2987 more_dirs = 0; 2988 } 2989 m_freem(mrep); 2990 } 2991 /* 2992 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2993 * by increasing d_reclen for the last record. 2994 */ 2995 if (blksiz > 0) { 2996 left = NFS_DIRFRAGSIZ - blksiz; 2997 memset(uiop->uio_iov->iov_base, 0, left); 2998 dp->d_reclen += left; 2999 NFS_STASHCOOKIE(dp, uiop->uio_offset); 3000 UIO_ADVANCE(uiop, left); 3001 } 3002 3003 /* 3004 * We are now either at the end of the directory or have filled the 3005 * block. 3006 */ 3007 if (bigenough) { 3008 dnp->n_direofoffset = uiop->uio_offset; 3009 dnp->n_flag |= NEOFVALID; 3010 } 3011 nfsmout: 3012 if (newvp != NULLVP) { 3013 if(newvp == vp) 3014 vrele(newvp); 3015 else 3016 vput(newvp); 3017 } 3018 return (error); 3019 } 3020 #endif 3021 3022 /* 3023 * Silly rename. To make the NFS filesystem that is stateless look a little 3024 * more like the "ufs" a remove of an active vnode is translated to a rename 3025 * to a funny looking filename that is removed by nfs_inactive on the 3026 * nfsnode. There is the potential for another process on a different client 3027 * to create the same funny name between the nfs_lookitup() fails and the 3028 * nfs_rename() completes, but... 3029 */ 3030 int 3031 nfs_sillyrename(dvp, vp, cnp, dolink) 3032 struct vnode *dvp, *vp; 3033 struct componentname *cnp; 3034 boolean_t dolink; 3035 { 3036 struct sillyrename *sp; 3037 struct nfsnode *np; 3038 int error; 3039 short pid; 3040 3041 cache_purge(dvp); 3042 np = VTONFS(vp); 3043 #ifndef DIAGNOSTIC 3044 if (vp->v_type == VDIR) 3045 panic("nfs: sillyrename dir"); 3046 #endif 3047 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 3048 M_NFSREQ, M_WAITOK); 3049 sp->s_cred = kauth_cred_dup(cnp->cn_cred); 3050 sp->s_dvp = dvp; 3051 VREF(dvp); 3052 3053 /* Fudge together a funny name */ 3054 pid = cnp->cn_lwp->l_proc->p_pid; 3055 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3056 sp->s_namlen = 12; 3057 sp->s_name[8] = hexdigits[pid & 0xf]; 3058 sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; 3059 sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; 3060 sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; 3061 3062 /* Try lookitups until we get one that isn't there */ 3063 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3064 cnp->cn_lwp, (struct nfsnode **)0) == 0) { 3065 sp->s_name[4]++; 3066 if (sp->s_name[4] > 'z') { 3067 error = EINVAL; 3068 goto bad; 3069 } 3070 } 3071 if (dolink) { 3072 error = nfs_linkrpc(dvp, vp, sp->s_name, sp->s_namlen, 3073 sp->s_cred, cnp->cn_lwp); 3074 /* 3075 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 3076 */ 3077 if (error == ENOTSUP) { 3078 error = nfs_renameit(dvp, cnp, sp); 3079 } 3080 } else { 3081 error = nfs_renameit(dvp, cnp, sp); 3082 } 3083 if (error) 3084 goto bad; 3085 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3086 cnp->cn_lwp, &np); 3087 np->n_sillyrename = sp; 3088 return (0); 3089 bad: 3090 vrele(sp->s_dvp); 3091 kauth_cred_free(sp->s_cred); 3092 free((caddr_t)sp, M_NFSREQ); 3093 return (error); 3094 } 3095 3096 /* 3097 * Look up a file name and optionally either update the file handle or 3098 * allocate an nfsnode, depending on the value of npp. 3099 * npp == NULL --> just do the lookup 3100 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3101 * handled too 3102 * *npp != NULL --> update the file handle in the vnode 3103 */ 3104 int 3105 nfs_lookitup(dvp, name, len, cred, l, npp) 3106 struct vnode *dvp; 3107 const char *name; 3108 int len; 3109 kauth_cred_t cred; 3110 struct lwp *l; 3111 struct nfsnode **npp; 3112 { 3113 u_int32_t *tl; 3114 caddr_t cp; 3115 int32_t t1, t2; 3116 struct vnode *newvp = (struct vnode *)0; 3117 struct nfsnode *np, *dnp = VTONFS(dvp); 3118 caddr_t bpos, dpos, cp2; 3119 int error = 0, fhlen; 3120 #ifndef NFS_V2_ONLY 3121 int attrflag; 3122 #endif 3123 struct mbuf *mreq, *mrep, *md, *mb; 3124 nfsfh_t *nfhp; 3125 const int v3 = NFS_ISV3(dvp); 3126 3127 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3128 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3129 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3130 nfsm_fhtom(dnp, v3); 3131 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3132 nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); 3133 if (npp && !error) { 3134 nfsm_getfh(nfhp, fhlen, v3); 3135 if (*npp) { 3136 np = *npp; 3137 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3138 free((caddr_t)np->n_fhp, M_NFSBIGFH); 3139 np->n_fhp = &np->n_fh; 3140 } 3141 #if NFS_SMALLFH < NFSX_V3FHMAX 3142 else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 3143 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 3144 #endif 3145 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 3146 np->n_fhsize = fhlen; 3147 newvp = NFSTOV(np); 3148 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3149 VREF(dvp); 3150 newvp = dvp; 3151 np = dnp; 3152 } else { 3153 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3154 if (error) { 3155 m_freem(mrep); 3156 return (error); 3157 } 3158 newvp = NFSTOV(np); 3159 } 3160 #ifndef NFS_V2_ONLY 3161 if (v3) { 3162 nfsm_postop_attr(newvp, attrflag, 0); 3163 if (!attrflag && *npp == NULL) { 3164 m_freem(mrep); 3165 vput(newvp); 3166 return (ENOENT); 3167 } 3168 } else 3169 #endif 3170 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3171 } 3172 nfsm_reqdone; 3173 if (npp && *npp == NULL) { 3174 if (error) { 3175 if (newvp) 3176 vput(newvp); 3177 } else 3178 *npp = np; 3179 } 3180 return (error); 3181 } 3182 3183 #ifndef NFS_V2_ONLY 3184 /* 3185 * Nfs Version 3 commit rpc 3186 */ 3187 int 3188 nfs_commit(vp, offset, cnt, l) 3189 struct vnode *vp; 3190 off_t offset; 3191 uint32_t cnt; 3192 struct lwp *l; 3193 { 3194 caddr_t cp; 3195 u_int32_t *tl; 3196 int32_t t1, t2; 3197 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3198 caddr_t bpos, dpos, cp2; 3199 int error = 0, wccflag = NFSV3_WCCRATTR; 3200 struct mbuf *mreq, *mrep, *md, *mb; 3201 struct nfsnode *np; 3202 3203 KASSERT(NFS_ISV3(vp)); 3204 3205 #ifdef NFS_DEBUG_COMMIT 3206 printf("commit %lu - %lu\n", (unsigned long)offset, 3207 (unsigned long)(offset + cnt)); 3208 #endif 3209 3210 simple_lock(&nmp->nm_slock); 3211 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3212 simple_unlock(&nmp->nm_slock); 3213 return (0); 3214 } 3215 simple_unlock(&nmp->nm_slock); 3216 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3217 np = VTONFS(vp); 3218 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3219 nfsm_fhtom(np, 1); 3220 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3221 txdr_hyper(offset, tl); 3222 tl += 2; 3223 *tl = txdr_unsigned(cnt); 3224 nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); 3225 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, FALSE); 3226 if (!error) { 3227 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3228 simple_lock(&nmp->nm_slock); 3229 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3230 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3231 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3232 error = NFSERR_STALEWRITEVERF; 3233 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3234 } 3235 simple_unlock(&nmp->nm_slock); 3236 } 3237 nfsm_reqdone; 3238 return (error); 3239 } 3240 #endif 3241 3242 /* 3243 * Kludge City.. 3244 * - make nfs_bmap() essentially a no-op that does no translation 3245 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3246 * (Maybe I could use the process's page mapping, but I was concerned that 3247 * Kernel Write might not be enabled and also figured copyout() would do 3248 * a lot more work than memcpy() and also it currently happens in the 3249 * context of the swapper process (2). 3250 */ 3251 int 3252 nfs_bmap(v) 3253 void *v; 3254 { 3255 struct vop_bmap_args /* { 3256 struct vnode *a_vp; 3257 daddr_t a_bn; 3258 struct vnode **a_vpp; 3259 daddr_t *a_bnp; 3260 int *a_runp; 3261 } */ *ap = v; 3262 struct vnode *vp = ap->a_vp; 3263 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3264 3265 if (ap->a_vpp != NULL) 3266 *ap->a_vpp = vp; 3267 if (ap->a_bnp != NULL) 3268 *ap->a_bnp = ap->a_bn << bshift; 3269 if (ap->a_runp != NULL) 3270 *ap->a_runp = 1024 * 1024; /* XXX */ 3271 return (0); 3272 } 3273 3274 /* 3275 * Strategy routine. 3276 * For async requests when nfsiod(s) are running, queue the request by 3277 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3278 * request. 3279 */ 3280 int 3281 nfs_strategy(v) 3282 void *v; 3283 { 3284 struct vop_strategy_args *ap = v; 3285 struct buf *bp = ap->a_bp; 3286 int error = 0; 3287 3288 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3289 panic("nfs physio/async"); 3290 3291 /* 3292 * If the op is asynchronous and an i/o daemon is waiting 3293 * queue the request, wake it up and wait for completion 3294 * otherwise just do it ourselves. 3295 */ 3296 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) 3297 error = nfs_doio(bp); 3298 return (error); 3299 } 3300 3301 /* 3302 * fsync vnode op. Just call nfs_flush() with commit == 1. 3303 */ 3304 /* ARGSUSED */ 3305 int 3306 nfs_fsync(v) 3307 void *v; 3308 { 3309 struct vop_fsync_args /* { 3310 struct vnodeop_desc *a_desc; 3311 struct vnode * a_vp; 3312 kauth_cred_t a_cred; 3313 int a_flags; 3314 off_t offlo; 3315 off_t offhi; 3316 struct lwp * a_l; 3317 } */ *ap = v; 3318 3319 struct vnode *vp = ap->a_vp; 3320 3321 if (vp->v_type != VREG) 3322 return 0; 3323 3324 return (nfs_flush(vp, ap->a_cred, 3325 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_l, 1)); 3326 } 3327 3328 /* 3329 * Flush all the data associated with a vnode. 3330 */ 3331 int 3332 nfs_flush( 3333 struct vnode *vp, 3334 kauth_cred_t cred __unused, 3335 int waitfor __unused, 3336 struct lwp *l __unused, 3337 int commit __unused 3338 ) 3339 { 3340 struct nfsnode *np = VTONFS(vp); 3341 int error; 3342 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3343 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3344 3345 simple_lock(&vp->v_interlock); 3346 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3347 if (np->n_flag & NWRITEERR) { 3348 error = np->n_error; 3349 np->n_flag &= ~NWRITEERR; 3350 } 3351 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3352 return (error); 3353 } 3354 3355 /* 3356 * Return POSIX pathconf information applicable to nfs. 3357 * 3358 * N.B. The NFS V2 protocol doesn't support this RPC. 3359 */ 3360 /* ARGSUSED */ 3361 int 3362 nfs_pathconf(v) 3363 void *v; 3364 { 3365 struct vop_pathconf_args /* { 3366 struct vnode *a_vp; 3367 int a_name; 3368 register_t *a_retval; 3369 } */ *ap = v; 3370 struct nfsv3_pathconf *pcp; 3371 struct vnode *vp = ap->a_vp; 3372 struct mbuf *mreq, *mrep, *md, *mb; 3373 int32_t t1, t2; 3374 u_int32_t *tl; 3375 caddr_t bpos, dpos, cp, cp2; 3376 int error = 0, attrflag; 3377 #ifndef NFS_V2_ONLY 3378 struct nfsmount *nmp; 3379 unsigned int l; 3380 u_int64_t maxsize; 3381 #endif 3382 const int v3 = NFS_ISV3(vp); 3383 struct nfsnode *np = VTONFS(vp); 3384 3385 switch (ap->a_name) { 3386 /* Names that can be resolved locally. */ 3387 case _PC_PIPE_BUF: 3388 *ap->a_retval = PIPE_BUF; 3389 break; 3390 case _PC_SYNC_IO: 3391 *ap->a_retval = 1; 3392 break; 3393 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3394 case _PC_LINK_MAX: 3395 case _PC_NAME_MAX: 3396 case _PC_CHOWN_RESTRICTED: 3397 case _PC_NO_TRUNC: 3398 if (!v3) { 3399 error = EINVAL; 3400 break; 3401 } 3402 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3403 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3404 nfsm_fhtom(np, 1); 3405 nfsm_request(np, NFSPROC_PATHCONF, 3406 curlwp, curlwp->l_cred); /* XXX */ 3407 nfsm_postop_attr(vp, attrflag, 0); 3408 if (!error) { 3409 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3410 NFSX_V3PATHCONF); 3411 switch (ap->a_name) { 3412 case _PC_LINK_MAX: 3413 *ap->a_retval = 3414 fxdr_unsigned(register_t, pcp->pc_linkmax); 3415 break; 3416 case _PC_NAME_MAX: 3417 *ap->a_retval = 3418 fxdr_unsigned(register_t, pcp->pc_namemax); 3419 break; 3420 case _PC_CHOWN_RESTRICTED: 3421 *ap->a_retval = 3422 (pcp->pc_chownrestricted == nfs_true); 3423 break; 3424 case _PC_NO_TRUNC: 3425 *ap->a_retval = 3426 (pcp->pc_notrunc == nfs_true); 3427 break; 3428 } 3429 } 3430 nfsm_reqdone; 3431 break; 3432 case _PC_FILESIZEBITS: 3433 #ifndef NFS_V2_ONLY 3434 if (v3) { 3435 nmp = VFSTONFS(vp->v_mount); 3436 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3437 if ((error = nfs_fsinfo(nmp, vp, 3438 curlwp->l_cred, curlwp)) != 0) /* XXX */ 3439 break; 3440 for (l = 0, maxsize = nmp->nm_maxfilesize; 3441 (maxsize >> l) > 0; l++) 3442 ; 3443 *ap->a_retval = l + 1; 3444 } else 3445 #endif 3446 { 3447 *ap->a_retval = 32; /* NFS V2 limitation */ 3448 } 3449 break; 3450 default: 3451 error = EINVAL; 3452 break; 3453 } 3454 3455 return (error); 3456 } 3457 3458 /* 3459 * NFS advisory byte-level locks. 3460 */ 3461 int 3462 nfs_advlock(v) 3463 void *v; 3464 { 3465 struct vop_advlock_args /* { 3466 struct vnode *a_vp; 3467 caddr_t a_id; 3468 int a_op; 3469 struct flock *a_fl; 3470 int a_flags; 3471 } */ *ap = v; 3472 struct nfsnode *np = VTONFS(ap->a_vp); 3473 3474 return lf_advlock(ap, &np->n_lockf, np->n_size); 3475 } 3476 3477 /* 3478 * Print out the contents of an nfsnode. 3479 */ 3480 int 3481 nfs_print(v) 3482 void *v; 3483 { 3484 struct vop_print_args /* { 3485 struct vnode *a_vp; 3486 } */ *ap = v; 3487 struct vnode *vp = ap->a_vp; 3488 struct nfsnode *np = VTONFS(vp); 3489 3490 printf("tag VT_NFS, fileid %lld fsid 0x%lx", 3491 (unsigned long long)np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3492 if (vp->v_type == VFIFO) 3493 fifo_printinfo(vp); 3494 printf("\n"); 3495 return (0); 3496 } 3497 3498 /* 3499 * nfs unlock wrapper. 3500 */ 3501 int 3502 nfs_unlock(void *v) 3503 { 3504 struct vop_unlock_args /* { 3505 struct vnode *a_vp; 3506 int a_flags; 3507 } */ *ap = v; 3508 struct vnode *vp = ap->a_vp; 3509 3510 /* 3511 * VOP_UNLOCK can be called by nfs_loadattrcache 3512 * with v_data == 0. 3513 */ 3514 if (VTONFS(vp)) { 3515 nfs_delayedtruncate(vp); 3516 } 3517 3518 return genfs_unlock(v); 3519 } 3520 3521 /* 3522 * nfs special file access vnode op. 3523 * Essentially just get vattr and then imitate iaccess() since the device is 3524 * local to the client. 3525 */ 3526 int 3527 nfsspec_access(v) 3528 void *v; 3529 { 3530 struct vop_access_args /* { 3531 struct vnode *a_vp; 3532 int a_mode; 3533 kauth_cred_t a_cred; 3534 struct lwp *a_l; 3535 } */ *ap = v; 3536 struct vattr va; 3537 struct vnode *vp = ap->a_vp; 3538 int error; 3539 3540 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_l); 3541 if (error) 3542 return (error); 3543 3544 /* 3545 * Disallow write attempts on filesystems mounted read-only; 3546 * unless the file is a socket, fifo, or a block or character 3547 * device resident on the filesystem. 3548 */ 3549 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3550 switch (vp->v_type) { 3551 case VREG: 3552 case VDIR: 3553 case VLNK: 3554 return (EROFS); 3555 default: 3556 break; 3557 } 3558 } 3559 3560 return (vaccess(va.va_type, va.va_mode, 3561 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3562 } 3563 3564 /* 3565 * Read wrapper for special devices. 3566 */ 3567 int 3568 nfsspec_read(v) 3569 void *v; 3570 { 3571 struct vop_read_args /* { 3572 struct vnode *a_vp; 3573 struct uio *a_uio; 3574 int a_ioflag; 3575 kauth_cred_t a_cred; 3576 } */ *ap = v; 3577 struct nfsnode *np = VTONFS(ap->a_vp); 3578 3579 /* 3580 * Set access flag. 3581 */ 3582 np->n_flag |= NACC; 3583 getnanotime(&np->n_atim); 3584 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3585 } 3586 3587 /* 3588 * Write wrapper for special devices. 3589 */ 3590 int 3591 nfsspec_write(v) 3592 void *v; 3593 { 3594 struct vop_write_args /* { 3595 struct vnode *a_vp; 3596 struct uio *a_uio; 3597 int a_ioflag; 3598 kauth_cred_t a_cred; 3599 } */ *ap = v; 3600 struct nfsnode *np = VTONFS(ap->a_vp); 3601 3602 /* 3603 * Set update flag. 3604 */ 3605 np->n_flag |= NUPD; 3606 getnanotime(&np->n_mtim); 3607 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3608 } 3609 3610 /* 3611 * Close wrapper for special devices. 3612 * 3613 * Update the times on the nfsnode then do device close. 3614 */ 3615 int 3616 nfsspec_close(v) 3617 void *v; 3618 { 3619 struct vop_close_args /* { 3620 struct vnode *a_vp; 3621 int a_fflag; 3622 kauth_cred_t a_cred; 3623 struct lwp *a_l; 3624 } */ *ap = v; 3625 struct vnode *vp = ap->a_vp; 3626 struct nfsnode *np = VTONFS(vp); 3627 struct vattr vattr; 3628 3629 if (np->n_flag & (NACC | NUPD)) { 3630 np->n_flag |= NCHG; 3631 if (vp->v_usecount == 1 && 3632 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3633 VATTR_NULL(&vattr); 3634 if (np->n_flag & NACC) 3635 vattr.va_atime = np->n_atim; 3636 if (np->n_flag & NUPD) 3637 vattr.va_mtime = np->n_mtim; 3638 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3639 } 3640 } 3641 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3642 } 3643 3644 /* 3645 * Read wrapper for fifos. 3646 */ 3647 int 3648 nfsfifo_read(v) 3649 void *v; 3650 { 3651 struct vop_read_args /* { 3652 struct vnode *a_vp; 3653 struct uio *a_uio; 3654 int a_ioflag; 3655 kauth_cred_t a_cred; 3656 } */ *ap = v; 3657 struct nfsnode *np = VTONFS(ap->a_vp); 3658 3659 /* 3660 * Set access flag. 3661 */ 3662 np->n_flag |= NACC; 3663 getnanotime(&np->n_atim); 3664 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3665 } 3666 3667 /* 3668 * Write wrapper for fifos. 3669 */ 3670 int 3671 nfsfifo_write(v) 3672 void *v; 3673 { 3674 struct vop_write_args /* { 3675 struct vnode *a_vp; 3676 struct uio *a_uio; 3677 int a_ioflag; 3678 kauth_cred_t a_cred; 3679 } */ *ap = v; 3680 struct nfsnode *np = VTONFS(ap->a_vp); 3681 3682 /* 3683 * Set update flag. 3684 */ 3685 np->n_flag |= NUPD; 3686 getnanotime(&np->n_mtim); 3687 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3688 } 3689 3690 /* 3691 * Close wrapper for fifos. 3692 * 3693 * Update the times on the nfsnode then do fifo close. 3694 */ 3695 int 3696 nfsfifo_close(v) 3697 void *v; 3698 { 3699 struct vop_close_args /* { 3700 struct vnode *a_vp; 3701 int a_fflag; 3702 kauth_cred_t a_cred; 3703 struct lwp *a_l; 3704 } */ *ap = v; 3705 struct vnode *vp = ap->a_vp; 3706 struct nfsnode *np = VTONFS(vp); 3707 struct vattr vattr; 3708 3709 if (np->n_flag & (NACC | NUPD)) { 3710 struct timespec ts; 3711 3712 getnanotime(&ts); 3713 if (np->n_flag & NACC) 3714 np->n_atim = ts; 3715 if (np->n_flag & NUPD) 3716 np->n_mtim = ts; 3717 np->n_flag |= NCHG; 3718 if (vp->v_usecount == 1 && 3719 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3720 VATTR_NULL(&vattr); 3721 if (np->n_flag & NACC) 3722 vattr.va_atime = np->n_atim; 3723 if (np->n_flag & NUPD) 3724 vattr.va_mtime = np->n_mtim; 3725 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_l); 3726 } 3727 } 3728 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3729 } 3730
Indexes created Thu Sep 25 16:09:42 GMT 2025