nfs_vnops.c revision 1.222.2.9
1 /* $NetBSD: nfs_vnops.c,v 1.222.2.9 2008/02/15 10:40:08 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * vnode op calls for Sun NFS version 2 and 3 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.222.2.9 2008/02/15 10:40:08 yamt Exp $"); 43 44 #include "opt_inet.h" 45 #include "opt_nfs.h" 46 #include "opt_uvmhist.h" 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/resourcevar.h> 53 #include <sys/mount.h> 54 #include <sys/buf.h> 55 #include <sys/condvar.h> 56 #include <sys/disk.h> 57 #include <sys/malloc.h> 58 #include <sys/kmem.h> 59 #include <sys/mbuf.h> 60 #include <sys/mutex.h> 61 #include <sys/namei.h> 62 #include <sys/vnode.h> 63 #include <sys/dirent.h> 64 #include <sys/fcntl.h> 65 #include <sys/hash.h> 66 #include <sys/lockf.h> 67 #include <sys/stat.h> 68 #include <sys/unistd.h> 69 #include <sys/kauth.h> 70 71 #include <uvm/uvm_extern.h> 72 #include <uvm/uvm.h> 73 74 #include <miscfs/fifofs/fifo.h> 75 #include <miscfs/genfs/genfs.h> 76 #include <miscfs/genfs/genfs_node.h> 77 #include <miscfs/specfs/specdev.h> 78 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfsproto.h> 81 #include <nfs/nfs.h> 82 #include <nfs/nfsnode.h> 83 #include <nfs/nfsmount.h> 84 #include <nfs/xdr_subs.h> 85 #include <nfs/nfsm_subs.h> 86 #include <nfs/nfs_var.h> 87 88 #include <net/if.h> 89 #include <netinet/in.h> 90 #include <netinet/in_var.h> 91 92 /* 93 * Global vfs data structures for nfs 94 */ 95 int (**nfsv2_vnodeop_p) __P((void *)); 96 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 97 { &vop_default_desc, vn_default_error }, 98 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 99 { &vop_create_desc, nfs_create }, /* create */ 100 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 101 { &vop_open_desc, nfs_open }, /* open */ 102 { &vop_close_desc, nfs_close }, /* close */ 103 { &vop_access_desc, nfs_access }, /* access */ 104 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 105 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 106 { &vop_read_desc, nfs_read }, /* read */ 107 { &vop_write_desc, nfs_write }, /* write */ 108 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, nfs_poll }, /* poll */ 111 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 112 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 113 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 114 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 115 { &vop_seek_desc, nfs_seek }, /* seek */ 116 { &vop_remove_desc, nfs_remove }, /* remove */ 117 { &vop_link_desc, nfs_link }, /* link */ 118 { &vop_rename_desc, nfs_rename }, /* rename */ 119 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 120 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 121 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 122 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 123 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 124 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 125 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 126 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 127 { &vop_lock_desc, nfs_lock }, /* lock */ 128 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 129 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 130 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 131 { &vop_print_desc, nfs_print }, /* print */ 132 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 133 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 134 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 135 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 136 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 137 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 138 { NULL, NULL } 139 }; 140 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 141 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 142 143 /* 144 * Special device vnode ops 145 */ 146 int (**spec_nfsv2nodeop_p) __P((void *)); 147 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 148 { &vop_default_desc, vn_default_error }, 149 { &vop_lookup_desc, spec_lookup }, /* lookup */ 150 { &vop_create_desc, spec_create }, /* create */ 151 { &vop_mknod_desc, spec_mknod }, /* mknod */ 152 { &vop_open_desc, spec_open }, /* open */ 153 { &vop_close_desc, nfsspec_close }, /* close */ 154 { &vop_access_desc, nfsspec_access }, /* access */ 155 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 156 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 157 { &vop_read_desc, nfsspec_read }, /* read */ 158 { &vop_write_desc, nfsspec_write }, /* write */ 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_fcntl_desc, genfs_fcntl }, /* fcntl */ 208 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 209 { &vop_poll_desc, fifo_poll }, /* poll */ 210 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 211 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 212 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 213 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 214 { &vop_seek_desc, fifo_seek }, /* seek */ 215 { &vop_remove_desc, fifo_remove }, /* remove */ 216 { &vop_link_desc, fifo_link }, /* link */ 217 { &vop_rename_desc, fifo_rename }, /* rename */ 218 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 219 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 220 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 221 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 222 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 223 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 224 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 225 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 226 { &vop_lock_desc, nfs_lock }, /* lock */ 227 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 228 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 229 { &vop_strategy_desc, genfs_badop }, /* strategy */ 230 { &vop_print_desc, nfs_print }, /* print */ 231 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 232 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 233 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 234 { &vop_bwrite_desc, genfs_badop }, /* bwrite */ 235 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 236 { NULL, NULL } 237 }; 238 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 239 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 240 241 static int nfs_linkrpc(struct vnode *, struct vnode *, const char *, 242 size_t, kauth_cred_t, struct lwp *); 243 static void nfs_writerpc_extfree(struct mbuf *, void *, size_t, void *); 244 245 /* 246 * Global variables 247 */ 248 extern u_int32_t nfs_true, nfs_false; 249 extern u_int32_t nfs_xdrneg1; 250 extern const nfstype nfsv3_type[9]; 251 252 int nfs_numasync = 0; 253 #define DIRHDSIZ _DIRENT_NAMEOFF(dp) 254 #define UIO_ADVANCE(uio, siz) \ 255 (void)((uio)->uio_resid -= (siz), \ 256 (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ 257 (uio)->uio_iov->iov_len -= (siz)) 258 259 static void nfs_cache_enter(struct vnode *, struct vnode *, 260 struct componentname *); 261 262 static void 263 nfs_cache_enter(struct vnode *dvp, struct vnode *vp, 264 struct componentname *cnp) 265 { 266 struct nfsnode *dnp = VTONFS(dvp); 267 268 if (vp != NULL) { 269 struct nfsnode *np = VTONFS(vp); 270 271 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 272 } 273 274 if (!timespecisset(&dnp->n_nctime)) 275 dnp->n_nctime = dnp->n_vattr->va_mtime; 276 277 cache_enter(dvp, vp, cnp); 278 } 279 280 /* 281 * nfs null call from vfs. 282 */ 283 int 284 nfs_null(vp, cred, l) 285 struct vnode *vp; 286 kauth_cred_t cred; 287 struct lwp *l; 288 { 289 char *bpos, *dpos; 290 int error = 0; 291 struct mbuf *mreq, *mrep, *md, *mb; 292 struct nfsnode *np = VTONFS(vp); 293 294 nfsm_reqhead(np, NFSPROC_NULL, 0); 295 nfsm_request(np, NFSPROC_NULL, l, cred); 296 nfsm_reqdone; 297 return (error); 298 } 299 300 /* 301 * nfs access vnode op. 302 * For nfs version 2, just return ok. File accesses may fail later. 303 * For nfs version 3, use the access rpc to check accessibility. If file modes 304 * are changed on the server, accesses might still fail later. 305 */ 306 int 307 nfs_access(v) 308 void *v; 309 { 310 struct vop_access_args /* { 311 struct vnode *a_vp; 312 int a_mode; 313 kauth_cred_t a_cred; 314 } */ *ap = v; 315 struct vnode *vp = ap->a_vp; 316 #ifndef NFS_V2_ONLY 317 u_int32_t *tl; 318 char *cp; 319 int32_t t1, t2; 320 char *bpos, *dpos, *cp2; 321 int error = 0, attrflag; 322 struct mbuf *mreq, *mrep, *md, *mb; 323 u_int32_t mode, rmode; 324 const int v3 = NFS_ISV3(vp); 325 #endif 326 int cachevalid; 327 struct nfsnode *np = VTONFS(vp); 328 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 329 330 cachevalid = (np->n_accstamp != -1 && 331 (time_uptime - np->n_accstamp) < nfs_attrtimeo(nmp, np) && 332 np->n_accuid == kauth_cred_geteuid(ap->a_cred)); 333 334 /* 335 * Check access cache first. If this request has been made for this 336 * uid shortly before, use the cached result. 337 */ 338 if (cachevalid) { 339 if (!np->n_accerror) { 340 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 341 return np->n_accerror; 342 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 343 return np->n_accerror; 344 } 345 346 #ifndef NFS_V2_ONLY 347 /* 348 * For nfs v3, do an access rpc, otherwise you are stuck emulating 349 * ufs_access() locally using the vattr. This may not be correct, 350 * since the server may apply other access criteria such as 351 * client uid-->server uid mapping that we do not know about, but 352 * this is better than just returning anything that is lying about 353 * in the cache. 354 */ 355 if (v3) { 356 nfsstats.rpccnt[NFSPROC_ACCESS]++; 357 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 358 nfsm_fhtom(np, v3); 359 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 360 if (ap->a_mode & VREAD) 361 mode = NFSV3ACCESS_READ; 362 else 363 mode = 0; 364 if (vp->v_type != VDIR) { 365 if (ap->a_mode & VWRITE) 366 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 367 if (ap->a_mode & VEXEC) 368 mode |= NFSV3ACCESS_EXECUTE; 369 } else { 370 if (ap->a_mode & VWRITE) 371 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 372 NFSV3ACCESS_DELETE); 373 if (ap->a_mode & VEXEC) 374 mode |= NFSV3ACCESS_LOOKUP; 375 } 376 *tl = txdr_unsigned(mode); 377 nfsm_request(np, NFSPROC_ACCESS, curlwp, ap->a_cred); 378 nfsm_postop_attr(vp, attrflag, 0); 379 if (!error) { 380 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 381 rmode = fxdr_unsigned(u_int32_t, *tl); 382 /* 383 * The NFS V3 spec does not clarify whether or not 384 * the returned access bits can be a superset of 385 * the ones requested, so... 386 */ 387 if ((rmode & mode) != mode) 388 error = EACCES; 389 } 390 nfsm_reqdone; 391 } else 392 #endif 393 return (nfsspec_access(ap)); 394 #ifndef NFS_V2_ONLY 395 /* 396 * Disallow write attempts on filesystems mounted read-only; 397 * unless the file is a socket, fifo, or a block or character 398 * device resident on the filesystem. 399 */ 400 if (!error && (ap->a_mode & VWRITE) && 401 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 402 switch (vp->v_type) { 403 case VREG: 404 case VDIR: 405 case VLNK: 406 error = EROFS; 407 default: 408 break; 409 } 410 } 411 412 if (!error || error == EACCES) { 413 /* 414 * If we got the same result as for a previous, 415 * different request, OR it in. Don't update 416 * the timestamp in that case. 417 */ 418 if (cachevalid && np->n_accstamp != -1 && 419 error == np->n_accerror) { 420 if (!error) 421 np->n_accmode |= ap->a_mode; 422 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 423 np->n_accmode = ap->a_mode; 424 } else { 425 np->n_accstamp = time_uptime; 426 np->n_accuid = kauth_cred_geteuid(ap->a_cred); 427 np->n_accmode = ap->a_mode; 428 np->n_accerror = error; 429 } 430 } 431 432 return (error); 433 #endif 434 } 435 436 /* 437 * nfs open vnode op 438 * Check to see if the type is ok 439 * and that deletion is not in progress. 440 * For paged in text files, you will need to flush the page cache 441 * if consistency is lost. 442 */ 443 /* ARGSUSED */ 444 int 445 nfs_open(v) 446 void *v; 447 { 448 struct vop_open_args /* { 449 struct vnode *a_vp; 450 int a_mode; 451 kauth_cred_t a_cred; 452 } */ *ap = v; 453 struct vnode *vp = ap->a_vp; 454 struct nfsnode *np = VTONFS(vp); 455 int error; 456 457 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 458 return (EACCES); 459 } 460 461 if (ap->a_mode & FREAD) { 462 if (np->n_rcred != NULL) 463 kauth_cred_free(np->n_rcred); 464 np->n_rcred = ap->a_cred; 465 kauth_cred_hold(np->n_rcred); 466 } 467 if (ap->a_mode & FWRITE) { 468 if (np->n_wcred != NULL) 469 kauth_cred_free(np->n_wcred); 470 np->n_wcred = ap->a_cred; 471 kauth_cred_hold(np->n_wcred); 472 } 473 474 error = nfs_flushstalebuf(vp, ap->a_cred, curlwp, 0); 475 if (error) 476 return error; 477 478 NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ 479 480 return (0); 481 } 482 483 /* 484 * nfs close vnode op 485 * What an NFS client should do upon close after writing is a debatable issue. 486 * Most NFS clients push delayed writes to the server upon close, basically for 487 * two reasons: 488 * 1 - So that any write errors may be reported back to the client process 489 * doing the close system call. By far the two most likely errors are 490 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 491 * 2 - To put a worst case upper bound on cache inconsistency between 492 * multiple clients for the file. 493 * There is also a consistency problem for Version 2 of the protocol w.r.t. 494 * not being able to tell if other clients are writing a file concurrently, 495 * since there is no way of knowing if the changed modify time in the reply 496 * is only due to the write for this client. 497 * (NFS Version 3 provides weak cache consistency data in the reply that 498 * should be sufficient to detect and handle this case.) 499 * 500 * The current code does the following: 501 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 502 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 503 * or commit them (this satisfies 1 and 2 except for the 504 * case where the server crashes after this close but 505 * before the commit RPC, which is felt to be "good 506 * enough". Changing the last argument to nfs_flush() to 507 * a 1 would force a commit operation, if it is felt a 508 * commit is necessary now. 509 */ 510 /* ARGSUSED */ 511 int 512 nfs_close(v) 513 void *v; 514 { 515 struct vop_close_args /* { 516 struct vnodeop_desc *a_desc; 517 struct vnode *a_vp; 518 int a_fflag; 519 kauth_cred_t a_cred; 520 } */ *ap = v; 521 struct vnode *vp = ap->a_vp; 522 struct nfsnode *np = VTONFS(vp); 523 int error = 0; 524 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 525 526 if (vp->v_type == VREG) { 527 if (np->n_flag & NMODIFIED) { 528 #ifndef NFS_V2_ONLY 529 if (NFS_ISV3(vp)) { 530 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, curlwp, 0); 531 np->n_flag &= ~NMODIFIED; 532 } else 533 #endif 534 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, curlwp, 1); 535 NFS_INVALIDATE_ATTRCACHE(np); 536 } 537 if (np->n_flag & NWRITEERR) { 538 np->n_flag &= ~NWRITEERR; 539 error = np->n_error; 540 } 541 } 542 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 543 return (error); 544 } 545 546 /* 547 * nfs getattr call from vfs. 548 */ 549 int 550 nfs_getattr(v) 551 void *v; 552 { 553 struct vop_getattr_args /* { 554 struct vnode *a_vp; 555 struct vattr *a_vap; 556 kauth_cred_t a_cred; 557 } */ *ap = v; 558 struct vnode *vp = ap->a_vp; 559 struct nfsnode *np = VTONFS(vp); 560 char *cp; 561 u_int32_t *tl; 562 int32_t t1, t2; 563 char *bpos, *dpos; 564 int error = 0; 565 struct mbuf *mreq, *mrep, *md, *mb; 566 const int v3 = NFS_ISV3(vp); 567 568 /* 569 * Update local times for special files. 570 */ 571 if (np->n_flag & (NACC | NUPD)) 572 np->n_flag |= NCHG; 573 574 /* 575 * if we have delayed truncation, do it now. 576 */ 577 nfs_delayedtruncate(vp); 578 579 /* 580 * First look in the cache. 581 */ 582 if (nfs_getattrcache(vp, ap->a_vap) == 0) 583 return (0); 584 nfsstats.rpccnt[NFSPROC_GETATTR]++; 585 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 586 nfsm_fhtom(np, v3); 587 nfsm_request(np, NFSPROC_GETATTR, curlwp, ap->a_cred); 588 if (!error) { 589 nfsm_loadattr(vp, ap->a_vap, 0); 590 if (vp->v_type == VDIR && 591 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 592 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 593 } 594 nfsm_reqdone; 595 return (error); 596 } 597 598 /* 599 * nfs setattr call. 600 */ 601 int 602 nfs_setattr(v) 603 void *v; 604 { 605 struct vop_setattr_args /* { 606 struct vnodeop_desc *a_desc; 607 struct vnode *a_vp; 608 struct vattr *a_vap; 609 kauth_cred_t a_cred; 610 } */ *ap = v; 611 struct vnode *vp = ap->a_vp; 612 struct nfsnode *np = VTONFS(vp); 613 struct vattr *vap = ap->a_vap; 614 int error = 0; 615 u_quad_t tsize = 0; 616 617 /* 618 * Setting of flags is not supported. 619 */ 620 if (vap->va_flags != VNOVAL) 621 return (EOPNOTSUPP); 622 623 /* 624 * Disallow write attempts if the filesystem is mounted read-only. 625 */ 626 if ((vap->va_uid != (uid_t)VNOVAL || 627 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 628 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 629 (vp->v_mount->mnt_flag & MNT_RDONLY)) 630 return (EROFS); 631 if (vap->va_size != VNOVAL) { 632 switch (vp->v_type) { 633 case VDIR: 634 return (EISDIR); 635 case VCHR: 636 case VBLK: 637 case VSOCK: 638 case VFIFO: 639 if (vap->va_mtime.tv_sec == VNOVAL && 640 vap->va_atime.tv_sec == VNOVAL && 641 vap->va_mode == (mode_t)VNOVAL && 642 vap->va_uid == (uid_t)VNOVAL && 643 vap->va_gid == (gid_t)VNOVAL) 644 return (0); 645 vap->va_size = VNOVAL; 646 break; 647 default: 648 /* 649 * Disallow write attempts if the filesystem is 650 * mounted read-only. 651 */ 652 if (vp->v_mount->mnt_flag & MNT_RDONLY) 653 return (EROFS); 654 genfs_node_wrlock(vp); 655 uvm_vnp_setsize(vp, vap->va_size); 656 tsize = np->n_size; 657 np->n_size = vap->va_size; 658 if (vap->va_size == 0) 659 error = nfs_vinvalbuf(vp, 0, 660 ap->a_cred, curlwp, 1); 661 else 662 error = nfs_vinvalbuf(vp, V_SAVE, 663 ap->a_cred, curlwp, 1); 664 if (error) { 665 uvm_vnp_setsize(vp, tsize); 666 genfs_node_unlock(vp); 667 return (error); 668 } 669 np->n_vattr->va_size = vap->va_size; 670 } 671 } else { 672 /* 673 * flush files before setattr because a later write of 674 * cached data might change timestamps or reset sugid bits 675 */ 676 if ((vap->va_mtime.tv_sec != VNOVAL || 677 vap->va_atime.tv_sec != VNOVAL || 678 vap->va_mode != VNOVAL) && 679 vp->v_type == VREG && 680 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 681 curlwp, 1)) == EINTR) 682 return (error); 683 } 684 error = nfs_setattrrpc(vp, vap, ap->a_cred, curlwp); 685 if (vap->va_size != VNOVAL) { 686 if (error) { 687 np->n_size = np->n_vattr->va_size = tsize; 688 uvm_vnp_setsize(vp, np->n_size); 689 } 690 genfs_node_unlock(vp); 691 } 692 VN_KNOTE(vp, NOTE_ATTRIB); 693 return (error); 694 } 695 696 /* 697 * Do an nfs setattr rpc. 698 */ 699 int 700 nfs_setattrrpc(vp, vap, cred, l) 701 struct vnode *vp; 702 struct vattr *vap; 703 kauth_cred_t cred; 704 struct lwp *l; 705 { 706 struct nfsv2_sattr *sp; 707 char *cp; 708 int32_t t1, t2; 709 char *bpos, *dpos; 710 u_int32_t *tl; 711 int error = 0; 712 struct mbuf *mreq, *mrep, *md, *mb; 713 const int v3 = NFS_ISV3(vp); 714 struct nfsnode *np = VTONFS(vp); 715 #ifndef NFS_V2_ONLY 716 int wccflag = NFSV3_WCCRATTR; 717 char *cp2; 718 #endif 719 720 nfsstats.rpccnt[NFSPROC_SETATTR]++; 721 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 722 nfsm_fhtom(np, v3); 723 #ifndef NFS_V2_ONLY 724 if (v3) { 725 nfsm_v3attrbuild(vap, true); 726 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 727 *tl = nfs_false; 728 } else { 729 #endif 730 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 731 if (vap->va_mode == (mode_t)VNOVAL) 732 sp->sa_mode = nfs_xdrneg1; 733 else 734 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 735 if (vap->va_uid == (uid_t)VNOVAL) 736 sp->sa_uid = nfs_xdrneg1; 737 else 738 sp->sa_uid = txdr_unsigned(vap->va_uid); 739 if (vap->va_gid == (gid_t)VNOVAL) 740 sp->sa_gid = nfs_xdrneg1; 741 else 742 sp->sa_gid = txdr_unsigned(vap->va_gid); 743 sp->sa_size = txdr_unsigned(vap->va_size); 744 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 745 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 746 #ifndef NFS_V2_ONLY 747 } 748 #endif 749 nfsm_request(np, NFSPROC_SETATTR, l, cred); 750 #ifndef NFS_V2_ONLY 751 if (v3) { 752 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, false); 753 } else 754 #endif 755 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 756 nfsm_reqdone; 757 return (error); 758 } 759 760 /* 761 * nfs lookup call, one step at a time... 762 * First look in cache 763 * If not found, unlock the directory nfsnode and do the rpc 764 * 765 * This code is full of lock/unlock statements and checks, because 766 * we continue after cache_lookup has finished (we need to check 767 * with the attr cache and do an rpc if it has timed out). This means 768 * that the locking effects of cache_lookup have to be taken into 769 * account. 770 */ 771 int 772 nfs_lookup(v) 773 void *v; 774 { 775 struct vop_lookup_args /* { 776 struct vnodeop_desc *a_desc; 777 struct vnode *a_dvp; 778 struct vnode **a_vpp; 779 struct componentname *a_cnp; 780 } */ *ap = v; 781 struct componentname *cnp = ap->a_cnp; 782 struct vnode *dvp = ap->a_dvp; 783 struct vnode **vpp = ap->a_vpp; 784 int flags; 785 struct vnode *newvp; 786 u_int32_t *tl; 787 char *cp; 788 int32_t t1, t2; 789 char *bpos, *dpos, *cp2; 790 struct mbuf *mreq, *mrep, *md, *mb; 791 long len; 792 nfsfh_t *fhp; 793 struct nfsnode *np; 794 int error = 0, attrflag, fhsize; 795 const int v3 = NFS_ISV3(dvp); 796 797 flags = cnp->cn_flags; 798 799 *vpp = NULLVP; 800 newvp = NULLVP; 801 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 802 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 803 return (EROFS); 804 if (dvp->v_type != VDIR) 805 return (ENOTDIR); 806 807 /* 808 * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. 809 */ 810 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 811 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 812 if (error) 813 return error; 814 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) 815 return EISDIR; 816 VREF(dvp); 817 *vpp = dvp; 818 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 819 cnp->cn_flags |= SAVENAME; 820 return 0; 821 } 822 823 np = VTONFS(dvp); 824 825 /* 826 * Before tediously performing a linear scan of the directory, 827 * check the name cache to see if the directory/name pair 828 * we are looking for is known already. 829 * If the directory/name pair is found in the name cache, 830 * we have to ensure the directory has not changed from 831 * the time the cache entry has been created. If it has, 832 * the cache entry has to be ignored. 833 */ 834 error = cache_lookup_raw(dvp, vpp, cnp); 835 KASSERT(dvp != *vpp); 836 if (error >= 0) { 837 struct vattr vattr; 838 int err2; 839 840 if (error && error != ENOENT) { 841 *vpp = NULLVP; 842 return error; 843 } 844 845 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 846 if (err2 != 0) { 847 if (error == 0) 848 vrele(*vpp); 849 *vpp = NULLVP; 850 return err2; 851 } 852 853 if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred) 854 || timespeccmp(&vattr.va_mtime, 855 &VTONFS(dvp)->n_nctime, !=)) { 856 if (error == 0) { 857 vrele(*vpp); 858 *vpp = NULLVP; 859 } 860 cache_purge1(dvp, NULL, PURGE_CHILDREN); 861 timespecclear(&np->n_nctime); 862 goto dorpc; 863 } 864 865 if (error == ENOENT) { 866 goto noentry; 867 } 868 869 newvp = *vpp; 870 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred) 871 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 872 nfsstats.lookupcache_hits++; 873 if ((flags & ISDOTDOT) != 0) { 874 VOP_UNLOCK(dvp, 0); 875 } 876 error = vn_lock(newvp, LK_EXCLUSIVE); 877 if ((flags & ISDOTDOT) != 0) { 878 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 879 } 880 if (error) { 881 /* newvp has been revoked. */ 882 vrele(newvp); 883 *vpp = NULL; 884 return error; 885 } 886 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 887 cnp->cn_flags |= SAVENAME; 888 KASSERT(newvp->v_type != VNON); 889 return (0); 890 } 891 cache_purge1(newvp, NULL, PURGE_PARENTS); 892 vrele(newvp); 893 *vpp = NULLVP; 894 } 895 dorpc: 896 #if 0 897 /* 898 * because nfsv3 has the same CREATE semantics as ours, 899 * we don't have to perform LOOKUPs beforehand. 900 * 901 * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. 902 * XXX although we have no way to know if O_EXCL is requested or not. 903 */ 904 905 if (v3 && cnp->cn_nameiop == CREATE && 906 (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && 907 (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 908 cnp->cn_flags |= SAVENAME; 909 return (EJUSTRETURN); 910 } 911 #endif /* 0 */ 912 913 error = 0; 914 newvp = NULLVP; 915 nfsstats.lookupcache_misses++; 916 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 917 len = cnp->cn_namelen; 918 nfsm_reqhead(np, NFSPROC_LOOKUP, 919 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 920 nfsm_fhtom(np, v3); 921 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 922 nfsm_request(np, NFSPROC_LOOKUP, curlwp, cnp->cn_cred); 923 if (error) { 924 nfsm_postop_attr(dvp, attrflag, 0); 925 m_freem(mrep); 926 goto nfsmout; 927 } 928 nfsm_getfh(fhp, fhsize, v3); 929 930 /* 931 * Handle RENAME case... 932 */ 933 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { 934 if (NFS_CMPFH(np, fhp, fhsize)) { 935 m_freem(mrep); 936 return (EISDIR); 937 } 938 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 939 if (error) { 940 m_freem(mrep); 941 return error; 942 } 943 newvp = NFSTOV(np); 944 #ifndef NFS_V2_ONLY 945 if (v3) { 946 nfsm_postop_attr(newvp, attrflag, 0); 947 nfsm_postop_attr(dvp, attrflag, 0); 948 } else 949 #endif 950 nfsm_loadattr(newvp, (struct vattr *)0, 0); 951 *vpp = newvp; 952 m_freem(mrep); 953 cnp->cn_flags |= SAVENAME; 954 goto validate; 955 } 956 957 /* 958 * The postop attr handling is duplicated for each if case, 959 * because it should be done while dvp is locked (unlocking 960 * dvp is different for each case). 961 */ 962 963 if (NFS_CMPFH(np, fhp, fhsize)) { 964 /* 965 * "." lookup 966 */ 967 VREF(dvp); 968 newvp = dvp; 969 #ifndef NFS_V2_ONLY 970 if (v3) { 971 nfsm_postop_attr(newvp, attrflag, 0); 972 nfsm_postop_attr(dvp, attrflag, 0); 973 } else 974 #endif 975 nfsm_loadattr(newvp, (struct vattr *)0, 0); 976 } else if (flags & ISDOTDOT) { 977 /* 978 * ".." lookup 979 */ 980 VOP_UNLOCK(dvp, 0); 981 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 982 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 983 if (error) { 984 m_freem(mrep); 985 return error; 986 } 987 newvp = NFSTOV(np); 988 989 #ifndef NFS_V2_ONLY 990 if (v3) { 991 nfsm_postop_attr(newvp, attrflag, 0); 992 nfsm_postop_attr(dvp, attrflag, 0); 993 } else 994 #endif 995 nfsm_loadattr(newvp, (struct vattr *)0, 0); 996 } else { 997 /* 998 * Other lookups. 999 */ 1000 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1001 if (error) { 1002 m_freem(mrep); 1003 return error; 1004 } 1005 newvp = NFSTOV(np); 1006 #ifndef NFS_V2_ONLY 1007 if (v3) { 1008 nfsm_postop_attr(newvp, attrflag, 0); 1009 nfsm_postop_attr(dvp, attrflag, 0); 1010 } else 1011 #endif 1012 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1013 } 1014 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1015 cnp->cn_flags |= SAVENAME; 1016 if ((cnp->cn_flags & MAKEENTRY) && 1017 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1018 nfs_cache_enter(dvp, newvp, cnp); 1019 } 1020 *vpp = newvp; 1021 nfsm_reqdone; 1022 if (error) { 1023 /* 1024 * We get here only because of errors returned by 1025 * the RPC. Otherwise we'll have returned above 1026 * (the nfsm_* macros will jump to nfsm_reqdone 1027 * on error). 1028 */ 1029 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1030 cnp->cn_nameiop != CREATE) { 1031 nfs_cache_enter(dvp, NULL, cnp); 1032 } 1033 if (newvp != NULLVP) { 1034 if (newvp == dvp) { 1035 vrele(newvp); 1036 } else { 1037 vput(newvp); 1038 } 1039 } 1040 noentry: 1041 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1042 (flags & ISLASTCN) && error == ENOENT) { 1043 if (dvp->v_mount->mnt_flag & MNT_RDONLY) { 1044 error = EROFS; 1045 } else { 1046 error = EJUSTRETURN; 1047 cnp->cn_flags |= SAVENAME; 1048 } 1049 } 1050 *vpp = NULL; 1051 return error; 1052 } 1053 1054 validate: 1055 /* 1056 * make sure we have valid type and size. 1057 */ 1058 1059 newvp = *vpp; 1060 if (newvp->v_type == VNON) { 1061 struct vattr vattr; /* dummy */ 1062 1063 KASSERT(VTONFS(newvp)->n_attrstamp == 0); 1064 error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred); 1065 if (error) { 1066 vput(newvp); 1067 *vpp = NULL; 1068 } 1069 } 1070 1071 return error; 1072 } 1073 1074 /* 1075 * nfs read call. 1076 * Just call nfs_bioread() to do the work. 1077 */ 1078 int 1079 nfs_read(v) 1080 void *v; 1081 { 1082 struct vop_read_args /* { 1083 struct vnode *a_vp; 1084 struct uio *a_uio; 1085 int a_ioflag; 1086 kauth_cred_t a_cred; 1087 } */ *ap = v; 1088 struct vnode *vp = ap->a_vp; 1089 1090 if (vp->v_type != VREG) 1091 return EISDIR; 1092 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1093 } 1094 1095 /* 1096 * nfs readlink call 1097 */ 1098 int 1099 nfs_readlink(v) 1100 void *v; 1101 { 1102 struct vop_readlink_args /* { 1103 struct vnode *a_vp; 1104 struct uio *a_uio; 1105 kauth_cred_t a_cred; 1106 } */ *ap = v; 1107 struct vnode *vp = ap->a_vp; 1108 struct nfsnode *np = VTONFS(vp); 1109 1110 if (vp->v_type != VLNK) 1111 return (EPERM); 1112 1113 if (np->n_rcred != NULL) { 1114 kauth_cred_free(np->n_rcred); 1115 } 1116 np->n_rcred = ap->a_cred; 1117 kauth_cred_hold(np->n_rcred); 1118 1119 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1120 } 1121 1122 /* 1123 * Do a readlink rpc. 1124 * Called by nfs_doio() from below the buffer cache. 1125 */ 1126 int 1127 nfs_readlinkrpc(vp, uiop, cred) 1128 struct vnode *vp; 1129 struct uio *uiop; 1130 kauth_cred_t cred; 1131 { 1132 u_int32_t *tl; 1133 char *cp; 1134 int32_t t1, t2; 1135 char *bpos, *dpos, *cp2; 1136 int error = 0; 1137 uint32_t len; 1138 struct mbuf *mreq, *mrep, *md, *mb; 1139 const int v3 = NFS_ISV3(vp); 1140 struct nfsnode *np = VTONFS(vp); 1141 #ifndef NFS_V2_ONLY 1142 int attrflag; 1143 #endif 1144 1145 nfsstats.rpccnt[NFSPROC_READLINK]++; 1146 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1147 nfsm_fhtom(np, v3); 1148 nfsm_request(np, NFSPROC_READLINK, curlwp, cred); 1149 #ifndef NFS_V2_ONLY 1150 if (v3) 1151 nfsm_postop_attr(vp, attrflag, 0); 1152 #endif 1153 if (!error) { 1154 #ifndef NFS_V2_ONLY 1155 if (v3) { 1156 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1157 len = fxdr_unsigned(uint32_t, *tl); 1158 if (len > MAXPATHLEN) { 1159 /* 1160 * this pathname is too long for us. 1161 */ 1162 m_freem(mrep); 1163 /* Solaris returns EINVAL. should we follow? */ 1164 error = ENAMETOOLONG; 1165 goto nfsmout; 1166 } 1167 } else 1168 #endif 1169 { 1170 nfsm_strsiz(len, NFS_MAXPATHLEN); 1171 } 1172 nfsm_mtouio(uiop, len); 1173 } 1174 nfsm_reqdone; 1175 return (error); 1176 } 1177 1178 /* 1179 * nfs read rpc call 1180 * Ditto above 1181 */ 1182 int 1183 nfs_readrpc(vp, uiop) 1184 struct vnode *vp; 1185 struct uio *uiop; 1186 { 1187 u_int32_t *tl; 1188 char *cp; 1189 int32_t t1, t2; 1190 char *bpos, *dpos, *cp2; 1191 struct mbuf *mreq, *mrep, *md, *mb; 1192 struct nfsmount *nmp; 1193 int error = 0, len, retlen, tsiz, eof, byte_count; 1194 const int v3 = NFS_ISV3(vp); 1195 struct nfsnode *np = VTONFS(vp); 1196 #ifndef NFS_V2_ONLY 1197 int attrflag; 1198 #endif 1199 1200 #ifndef nolint 1201 eof = 0; 1202 #endif 1203 nmp = VFSTONFS(vp->v_mount); 1204 tsiz = uiop->uio_resid; 1205 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1206 return (EFBIG); 1207 mutex_enter(&nmp->nm_lock); 1208 iostat_busy(nmp->nm_stats); 1209 mutex_exit(&nmp->nm_lock); 1210 byte_count = 0; /* count bytes actually transferred */ 1211 while (tsiz > 0) { 1212 nfsstats.rpccnt[NFSPROC_READ]++; 1213 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1214 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1215 nfsm_fhtom(np, v3); 1216 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1217 #ifndef NFS_V2_ONLY 1218 if (v3) { 1219 txdr_hyper(uiop->uio_offset, tl); 1220 *(tl + 2) = txdr_unsigned(len); 1221 } else 1222 #endif 1223 { 1224 *tl++ = txdr_unsigned(uiop->uio_offset); 1225 *tl++ = txdr_unsigned(len); 1226 *tl = 0; 1227 } 1228 nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); 1229 #ifndef NFS_V2_ONLY 1230 if (v3) { 1231 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1232 if (error) { 1233 m_freem(mrep); 1234 goto nfsmout; 1235 } 1236 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1237 eof = fxdr_unsigned(int, *(tl + 1)); 1238 } else 1239 #endif 1240 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1241 nfsm_strsiz(retlen, nmp->nm_rsize); 1242 nfsm_mtouio(uiop, retlen); 1243 m_freem(mrep); 1244 tsiz -= retlen; 1245 byte_count += retlen; 1246 #ifndef NFS_V2_ONLY 1247 if (v3) { 1248 if (eof || retlen == 0) 1249 tsiz = 0; 1250 } else 1251 #endif 1252 if (retlen < len) 1253 tsiz = 0; 1254 } 1255 nfsmout: 1256 mutex_enter(&nmp->nm_lock); 1257 iostat_unbusy(nmp->nm_stats, byte_count, 1); 1258 mutex_exit(&nmp->nm_lock); 1259 return (error); 1260 } 1261 1262 struct nfs_writerpc_context { 1263 kmutex_t nwc_lock; 1264 kcondvar_t nwc_cv; 1265 int nwc_mbufcount; 1266 }; 1267 1268 /* 1269 * free mbuf used to refer protected pages while write rpc call. 1270 * called at splvm. 1271 */ 1272 static void 1273 nfs_writerpc_extfree(struct mbuf *m, void *tbuf, size_t size, void *arg) 1274 { 1275 struct nfs_writerpc_context *ctx = arg; 1276 1277 KASSERT(m != NULL); 1278 KASSERT(ctx != NULL); 1279 pool_cache_put(mb_cache, m); 1280 mutex_enter(&ctx->nwc_lock); 1281 if (--ctx->nwc_mbufcount == 0) { 1282 cv_signal(&ctx->nwc_cv); 1283 } 1284 mutex_exit(&ctx->nwc_lock); 1285 } 1286 1287 /* 1288 * nfs write call 1289 */ 1290 int 1291 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1292 struct vnode *vp; 1293 struct uio *uiop; 1294 int *iomode; 1295 bool pageprotected; 1296 bool *stalewriteverfp; 1297 { 1298 u_int32_t *tl; 1299 char *cp; 1300 int32_t t1, t2; 1301 char *bpos, *dpos; 1302 struct mbuf *mreq, *mrep, *md, *mb; 1303 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1304 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; 1305 const int v3 = NFS_ISV3(vp); 1306 int committed = NFSV3WRITE_FILESYNC; 1307 struct nfsnode *np = VTONFS(vp); 1308 struct nfs_writerpc_context ctx; 1309 int byte_count; 1310 struct lwp *l = NULL; 1311 size_t origresid; 1312 #ifndef NFS_V2_ONLY 1313 char *cp2; 1314 int rlen, commit; 1315 #endif 1316 1317 mutex_init(&ctx.nwc_lock, MUTEX_DRIVER, IPL_VM); 1318 cv_init(&ctx.nwc_cv, "nfsmblk"); 1319 ctx.nwc_mbufcount = 1; 1320 1321 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1322 panic("writerpc readonly vp %p", vp); 1323 } 1324 1325 #ifdef DIAGNOSTIC 1326 if (uiop->uio_iovcnt != 1) 1327 panic("nfs: writerpc iovcnt > 1"); 1328 #endif 1329 tsiz = uiop->uio_resid; 1330 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1331 return (EFBIG); 1332 if (pageprotected) { 1333 l = curlwp; 1334 uvm_lwp_hold(l); 1335 } 1336 retry: 1337 origresid = uiop->uio_resid; 1338 KASSERT(origresid == uiop->uio_iov->iov_len); 1339 mutex_enter(&nmp->nm_lock); 1340 iostat_busy(nmp->nm_stats); 1341 mutex_exit(&nmp->nm_lock); 1342 byte_count = 0; /* count of bytes actually written */ 1343 while (tsiz > 0) { 1344 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1345 uint32_t backup; 1346 bool stalewriteverf = false; 1347 1348 nfsstats.rpccnt[NFSPROC_WRITE]++; 1349 len = min(tsiz, nmp->nm_wsize); 1350 datalen = pageprotected ? 0 : nfsm_rndup(len); 1351 nfsm_reqhead(np, NFSPROC_WRITE, 1352 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1353 nfsm_fhtom(np, v3); 1354 #ifndef NFS_V2_ONLY 1355 if (v3) { 1356 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1357 txdr_hyper(uiop->uio_offset, tl); 1358 tl += 2; 1359 *tl++ = txdr_unsigned(len); 1360 *tl++ = txdr_unsigned(*iomode); 1361 *tl = txdr_unsigned(len); 1362 } else 1363 #endif 1364 { 1365 u_int32_t x; 1366 1367 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1368 /* Set both "begin" and "current" to non-garbage. */ 1369 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1370 *tl++ = x; /* "begin offset" */ 1371 *tl++ = x; /* "current offset" */ 1372 x = txdr_unsigned(len); 1373 *tl++ = x; /* total to this offset */ 1374 *tl = x; /* size of this write */ 1375 1376 } 1377 if (pageprotected) { 1378 /* 1379 * since we know pages can't be modified during i/o, 1380 * no need to copy them for us. 1381 */ 1382 struct mbuf *m; 1383 struct iovec *iovp = uiop->uio_iov; 1384 1385 m = m_get(M_WAIT, MT_DATA); 1386 MCLAIM(m, &nfs_mowner); 1387 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1388 nfs_writerpc_extfree, &ctx); 1389 m->m_flags |= M_EXT_ROMAP; 1390 m->m_len = len; 1391 mb->m_next = m; 1392 /* 1393 * no need to maintain mb and bpos here 1394 * because no one care them later. 1395 */ 1396 #if 0 1397 mb = m; 1398 bpos = mtod(void *, mb) + mb->m_len; 1399 #endif 1400 UIO_ADVANCE(uiop, len); 1401 uiop->uio_offset += len; 1402 mutex_enter(&ctx.nwc_lock); 1403 ctx.nwc_mbufcount++; 1404 mutex_exit(&ctx.nwc_lock); 1405 nfs_zeropad(mb, 0, nfsm_padlen(len)); 1406 } else { 1407 nfsm_uiotom(uiop, len); 1408 } 1409 nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); 1410 #ifndef NFS_V2_ONLY 1411 if (v3) { 1412 wccflag = NFSV3_WCCCHK; 1413 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); 1414 if (!error) { 1415 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1416 + NFSX_V3WRITEVERF); 1417 rlen = fxdr_unsigned(int, *tl++); 1418 if (rlen == 0) { 1419 error = NFSERR_IO; 1420 m_freem(mrep); 1421 break; 1422 } else if (rlen < len) { 1423 backup = len - rlen; 1424 UIO_ADVANCE(uiop, -backup); 1425 uiop->uio_offset -= backup; 1426 len = rlen; 1427 } 1428 commit = fxdr_unsigned(int, *tl++); 1429 1430 /* 1431 * Return the lowest committment level 1432 * obtained by any of the RPCs. 1433 */ 1434 if (committed == NFSV3WRITE_FILESYNC) 1435 committed = commit; 1436 else if (committed == NFSV3WRITE_DATASYNC && 1437 commit == NFSV3WRITE_UNSTABLE) 1438 committed = commit; 1439 mutex_enter(&nmp->nm_lock); 1440 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1441 memcpy(nmp->nm_writeverf, tl, 1442 NFSX_V3WRITEVERF); 1443 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1444 } else if ((nmp->nm_iflag & 1445 NFSMNT_STALEWRITEVERF) || 1446 memcmp(tl, nmp->nm_writeverf, 1447 NFSX_V3WRITEVERF)) { 1448 memcpy(nmp->nm_writeverf, tl, 1449 NFSX_V3WRITEVERF); 1450 /* 1451 * note NFSMNT_STALEWRITEVERF 1452 * if we're the first thread to 1453 * notice it. 1454 */ 1455 if ((nmp->nm_iflag & 1456 NFSMNT_STALEWRITEVERF) == 0) { 1457 stalewriteverf = true; 1458 nmp->nm_iflag |= 1459 NFSMNT_STALEWRITEVERF; 1460 } 1461 } 1462 mutex_exit(&nmp->nm_lock); 1463 } 1464 } else 1465 #endif 1466 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1467 if (wccflag) 1468 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1469 m_freem(mrep); 1470 if (error) 1471 break; 1472 tsiz -= len; 1473 byte_count += len; 1474 if (stalewriteverf) { 1475 *stalewriteverfp = true; 1476 stalewriteverf = false; 1477 if (committed == NFSV3WRITE_UNSTABLE && 1478 len != origresid) { 1479 /* 1480 * if our write requests weren't atomic but 1481 * unstable, datas in previous iterations 1482 * might have already been lost now. 1483 * then, we should resend them to nfsd. 1484 */ 1485 backup = origresid - tsiz; 1486 UIO_ADVANCE(uiop, -backup); 1487 uiop->uio_offset -= backup; 1488 tsiz = origresid; 1489 goto retry; 1490 } 1491 } 1492 } 1493 nfsmout: 1494 mutex_enter(&nmp->nm_lock); 1495 iostat_unbusy(nmp->nm_stats, byte_count, 0); 1496 mutex_exit(&nmp->nm_lock); 1497 if (pageprotected) { 1498 /* 1499 * wait until mbufs go away. 1500 * retransmitted mbufs can survive longer than rpc requests 1501 * themselves. 1502 */ 1503 mutex_enter(&ctx.nwc_lock); 1504 ctx.nwc_mbufcount--; 1505 while (ctx.nwc_mbufcount > 0) { 1506 cv_wait(&ctx.nwc_cv, &ctx.nwc_lock); 1507 } 1508 mutex_exit(&ctx.nwc_lock); 1509 uvm_lwp_rele(l); 1510 } 1511 mutex_destroy(&ctx.nwc_lock); 1512 cv_destroy(&ctx.nwc_cv); 1513 *iomode = committed; 1514 if (error) 1515 uiop->uio_resid = tsiz; 1516 return (error); 1517 } 1518 1519 /* 1520 * nfs mknod rpc 1521 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1522 * mode set to specify the file type and the size field for rdev. 1523 */ 1524 int 1525 nfs_mknodrpc(dvp, vpp, cnp, vap) 1526 struct vnode *dvp; 1527 struct vnode **vpp; 1528 struct componentname *cnp; 1529 struct vattr *vap; 1530 { 1531 struct nfsv2_sattr *sp; 1532 u_int32_t *tl; 1533 char *cp; 1534 int32_t t1, t2; 1535 struct vnode *newvp = (struct vnode *)0; 1536 struct nfsnode *dnp, *np; 1537 char *cp2; 1538 char *bpos, *dpos; 1539 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1540 struct mbuf *mreq, *mrep, *md, *mb; 1541 u_int32_t rdev; 1542 const int v3 = NFS_ISV3(dvp); 1543 1544 if (vap->va_type == VCHR || vap->va_type == VBLK) 1545 rdev = txdr_unsigned(vap->va_rdev); 1546 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1547 rdev = nfs_xdrneg1; 1548 else { 1549 VOP_ABORTOP(dvp, cnp); 1550 vput(dvp); 1551 return (EOPNOTSUPP); 1552 } 1553 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1554 dnp = VTONFS(dvp); 1555 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1556 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1557 nfsm_fhtom(dnp, v3); 1558 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1559 #ifndef NFS_V2_ONLY 1560 if (v3) { 1561 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1562 *tl++ = vtonfsv3_type(vap->va_type); 1563 nfsm_v3attrbuild(vap, false); 1564 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1565 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1566 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1567 *tl = txdr_unsigned(minor(vap->va_rdev)); 1568 } 1569 } else 1570 #endif 1571 { 1572 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1573 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1574 sp->sa_uid = nfs_xdrneg1; 1575 sp->sa_gid = nfs_xdrneg1; 1576 sp->sa_size = rdev; 1577 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1578 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1579 } 1580 nfsm_request(dnp, NFSPROC_MKNOD, curlwp, cnp->cn_cred); 1581 if (!error) { 1582 nfsm_mtofh(dvp, newvp, v3, gotvp); 1583 if (!gotvp) { 1584 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1585 cnp->cn_namelen, cnp->cn_cred, curlwp, &np); 1586 if (!error) 1587 newvp = NFSTOV(np); 1588 } 1589 } 1590 #ifndef NFS_V2_ONLY 1591 if (v3) 1592 nfsm_wcc_data(dvp, wccflag, 0, !error); 1593 #endif 1594 nfsm_reqdone; 1595 if (error) { 1596 if (newvp) 1597 vput(newvp); 1598 } else { 1599 if (cnp->cn_flags & MAKEENTRY) 1600 nfs_cache_enter(dvp, newvp, cnp); 1601 *vpp = newvp; 1602 } 1603 PNBUF_PUT(cnp->cn_pnbuf); 1604 VTONFS(dvp)->n_flag |= NMODIFIED; 1605 if (!wccflag) 1606 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1607 vput(dvp); 1608 return (error); 1609 } 1610 1611 /* 1612 * nfs mknod vop 1613 * just call nfs_mknodrpc() to do the work. 1614 */ 1615 /* ARGSUSED */ 1616 int 1617 nfs_mknod(v) 1618 void *v; 1619 { 1620 struct vop_mknod_args /* { 1621 struct vnode *a_dvp; 1622 struct vnode **a_vpp; 1623 struct componentname *a_cnp; 1624 struct vattr *a_vap; 1625 } */ *ap = v; 1626 struct vnode *dvp = ap->a_dvp; 1627 struct componentname *cnp = ap->a_cnp; 1628 int error; 1629 1630 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); 1631 VN_KNOTE(dvp, NOTE_WRITE); 1632 if (error == 0 || error == EEXIST) 1633 cache_purge1(dvp, cnp, 0); 1634 return (error); 1635 } 1636 1637 #ifndef NFS_V2_ONLY 1638 static u_long create_verf; 1639 #endif 1640 /* 1641 * nfs file create call 1642 */ 1643 int 1644 nfs_create(v) 1645 void *v; 1646 { 1647 struct vop_create_args /* { 1648 struct vnode *a_dvp; 1649 struct vnode **a_vpp; 1650 struct componentname *a_cnp; 1651 struct vattr *a_vap; 1652 } */ *ap = v; 1653 struct vnode *dvp = ap->a_dvp; 1654 struct vattr *vap = ap->a_vap; 1655 struct componentname *cnp = ap->a_cnp; 1656 struct nfsv2_sattr *sp; 1657 u_int32_t *tl; 1658 char *cp; 1659 int32_t t1, t2; 1660 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1661 struct vnode *newvp = (struct vnode *)0; 1662 char *bpos, *dpos, *cp2; 1663 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1664 struct mbuf *mreq, *mrep, *md, *mb; 1665 const int v3 = NFS_ISV3(dvp); 1666 u_int32_t excl_mode = NFSV3CREATE_UNCHECKED; 1667 1668 /* 1669 * Oops, not for me.. 1670 */ 1671 if (vap->va_type == VSOCK) 1672 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1673 1674 KASSERT(vap->va_type == VREG); 1675 1676 #ifdef VA_EXCLUSIVE 1677 if (vap->va_vaflags & VA_EXCLUSIVE) { 1678 excl_mode = NFSV3CREATE_EXCLUSIVE; 1679 } 1680 #endif 1681 again: 1682 error = 0; 1683 nfsstats.rpccnt[NFSPROC_CREATE]++; 1684 dnp = VTONFS(dvp); 1685 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1686 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1687 nfsm_fhtom(dnp, v3); 1688 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1689 #ifndef NFS_V2_ONLY 1690 if (v3) { 1691 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1692 if (excl_mode == NFSV3CREATE_EXCLUSIVE) { 1693 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1694 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1695 #ifdef INET 1696 if (TAILQ_FIRST(&in_ifaddrhead)) 1697 *tl++ = TAILQ_FIRST(&in_ifaddrhead)-> 1698 ia_addr.sin_addr.s_addr; 1699 else 1700 *tl++ = create_verf; 1701 #else 1702 *tl++ = create_verf; 1703 #endif 1704 *tl = ++create_verf; 1705 } else { 1706 *tl = txdr_unsigned(excl_mode); 1707 nfsm_v3attrbuild(vap, false); 1708 } 1709 } else 1710 #endif 1711 { 1712 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1713 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1714 sp->sa_uid = nfs_xdrneg1; 1715 sp->sa_gid = nfs_xdrneg1; 1716 sp->sa_size = 0; 1717 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1718 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1719 } 1720 nfsm_request(dnp, NFSPROC_CREATE, curlwp, cnp->cn_cred); 1721 if (!error) { 1722 nfsm_mtofh(dvp, newvp, v3, gotvp); 1723 if (!gotvp) { 1724 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1725 cnp->cn_namelen, cnp->cn_cred, curlwp, &np); 1726 if (!error) 1727 newvp = NFSTOV(np); 1728 } 1729 } 1730 #ifndef NFS_V2_ONLY 1731 if (v3) 1732 nfsm_wcc_data(dvp, wccflag, 0, !error); 1733 #endif 1734 nfsm_reqdone; 1735 if (error) { 1736 /* 1737 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 1738 */ 1739 if (v3 && error == ENOTSUP) { 1740 if (excl_mode == NFSV3CREATE_EXCLUSIVE) { 1741 excl_mode = NFSV3CREATE_GUARDED; 1742 goto again; 1743 } else if (excl_mode == NFSV3CREATE_GUARDED) { 1744 excl_mode = NFSV3CREATE_UNCHECKED; 1745 goto again; 1746 } 1747 } 1748 } else if (v3 && (excl_mode == NFSV3CREATE_EXCLUSIVE)) { 1749 struct timespec ts; 1750 1751 getnanotime(&ts); 1752 1753 /* 1754 * make sure that we'll update timestamps as 1755 * most server implementations use them to store 1756 * the create verifier. 1757 * 1758 * XXX it's better to use TOSERVER always. 1759 */ 1760 1761 if (vap->va_atime.tv_sec == VNOVAL) 1762 vap->va_atime = ts; 1763 if (vap->va_mtime.tv_sec == VNOVAL) 1764 vap->va_mtime = ts; 1765 1766 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, curlwp); 1767 } 1768 if (error == 0) { 1769 if (cnp->cn_flags & MAKEENTRY) 1770 nfs_cache_enter(dvp, newvp, cnp); 1771 else 1772 cache_purge1(dvp, cnp, 0); 1773 *ap->a_vpp = newvp; 1774 } else { 1775 if (newvp) 1776 vput(newvp); 1777 if (error == EEXIST) 1778 cache_purge1(dvp, cnp, 0); 1779 } 1780 PNBUF_PUT(cnp->cn_pnbuf); 1781 VTONFS(dvp)->n_flag |= NMODIFIED; 1782 if (!wccflag) 1783 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1784 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1785 vput(dvp); 1786 return (error); 1787 } 1788 1789 /* 1790 * nfs file remove call 1791 * To try and make nfs semantics closer to ufs semantics, a file that has 1792 * other processes using the vnode is renamed instead of removed and then 1793 * removed later on the last close. 1794 * - If v_usecount > 1 1795 * If a rename is not already in the works 1796 * call nfs_sillyrename() to set it up 1797 * else 1798 * do the remove rpc 1799 */ 1800 int 1801 nfs_remove(v) 1802 void *v; 1803 { 1804 struct vop_remove_args /* { 1805 struct vnodeop_desc *a_desc; 1806 struct vnode * a_dvp; 1807 struct vnode * a_vp; 1808 struct componentname * a_cnp; 1809 } */ *ap = v; 1810 struct vnode *vp = ap->a_vp; 1811 struct vnode *dvp = ap->a_dvp; 1812 struct componentname *cnp = ap->a_cnp; 1813 struct nfsnode *np = VTONFS(vp); 1814 int error = 0; 1815 struct vattr vattr; 1816 1817 #ifndef DIAGNOSTIC 1818 if ((cnp->cn_flags & HASBUF) == 0) 1819 panic("nfs_remove: no name"); 1820 if (vp->v_usecount < 1) 1821 panic("nfs_remove: bad v_usecount"); 1822 #endif 1823 if (vp->v_type == VDIR) 1824 error = EPERM; 1825 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1826 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && 1827 vattr.va_nlink > 1)) { 1828 /* 1829 * Purge the name cache so that the chance of a lookup for 1830 * the name succeeding while the remove is in progress is 1831 * minimized. Without node locking it can still happen, such 1832 * that an I/O op returns ESTALE, but since you get this if 1833 * another host removes the file.. 1834 */ 1835 cache_purge(vp); 1836 /* 1837 * throw away biocache buffers, mainly to avoid 1838 * unnecessary delayed writes later. 1839 */ 1840 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, curlwp, 1); 1841 /* Do the rpc */ 1842 if (error != EINTR) 1843 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1844 cnp->cn_namelen, cnp->cn_cred, curlwp); 1845 } else if (!np->n_sillyrename) 1846 error = nfs_sillyrename(dvp, vp, cnp, false); 1847 PNBUF_PUT(cnp->cn_pnbuf); 1848 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1849 vattr.va_nlink == 1) { 1850 np->n_flag |= NREMOVED; 1851 } 1852 NFS_INVALIDATE_ATTRCACHE(np); 1853 VN_KNOTE(vp, NOTE_DELETE); 1854 VN_KNOTE(dvp, NOTE_WRITE); 1855 if (dvp == vp) 1856 vrele(vp); 1857 else 1858 vput(vp); 1859 vput(dvp); 1860 return (error); 1861 } 1862 1863 /* 1864 * nfs file remove rpc called from nfs_inactive 1865 */ 1866 int 1867 nfs_removeit(sp) 1868 struct sillyrename *sp; 1869 { 1870 1871 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1872 (struct lwp *)0)); 1873 } 1874 1875 /* 1876 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1877 */ 1878 int 1879 nfs_removerpc(dvp, name, namelen, cred, l) 1880 struct vnode *dvp; 1881 const char *name; 1882 int namelen; 1883 kauth_cred_t cred; 1884 struct lwp *l; 1885 { 1886 u_int32_t *tl; 1887 char *cp; 1888 #ifndef NFS_V2_ONLY 1889 int32_t t1; 1890 char *cp2; 1891 #endif 1892 int32_t t2; 1893 char *bpos, *dpos; 1894 int error = 0, wccflag = NFSV3_WCCRATTR; 1895 struct mbuf *mreq, *mrep, *md, *mb; 1896 const int v3 = NFS_ISV3(dvp); 1897 int rexmit = 0; 1898 struct nfsnode *dnp = VTONFS(dvp); 1899 1900 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1901 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1902 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1903 nfsm_fhtom(dnp, v3); 1904 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1905 nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); 1906 #ifndef NFS_V2_ONLY 1907 if (v3) 1908 nfsm_wcc_data(dvp, wccflag, 0, !error); 1909 #endif 1910 nfsm_reqdone; 1911 VTONFS(dvp)->n_flag |= NMODIFIED; 1912 if (!wccflag) 1913 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 1914 /* 1915 * Kludge City: If the first reply to the remove rpc is lost.. 1916 * the reply to the retransmitted request will be ENOENT 1917 * since the file was in fact removed 1918 * Therefore, we cheat and return success. 1919 */ 1920 if (rexmit && error == ENOENT) 1921 error = 0; 1922 return (error); 1923 } 1924 1925 /* 1926 * nfs file rename call 1927 */ 1928 int 1929 nfs_rename(v) 1930 void *v; 1931 { 1932 struct vop_rename_args /* { 1933 struct vnode *a_fdvp; 1934 struct vnode *a_fvp; 1935 struct componentname *a_fcnp; 1936 struct vnode *a_tdvp; 1937 struct vnode *a_tvp; 1938 struct componentname *a_tcnp; 1939 } */ *ap = v; 1940 struct vnode *fvp = ap->a_fvp; 1941 struct vnode *tvp = ap->a_tvp; 1942 struct vnode *fdvp = ap->a_fdvp; 1943 struct vnode *tdvp = ap->a_tdvp; 1944 struct componentname *tcnp = ap->a_tcnp; 1945 struct componentname *fcnp = ap->a_fcnp; 1946 int error; 1947 1948 #ifndef DIAGNOSTIC 1949 if ((tcnp->cn_flags & HASBUF) == 0 || 1950 (fcnp->cn_flags & HASBUF) == 0) 1951 panic("nfs_rename: no name"); 1952 #endif 1953 /* Check for cross-device rename */ 1954 if ((fvp->v_mount != tdvp->v_mount) || 1955 (tvp && (fvp->v_mount != tvp->v_mount))) { 1956 error = EXDEV; 1957 goto out; 1958 } 1959 1960 /* 1961 * If the tvp exists and is in use, sillyrename it before doing the 1962 * rename of the new file over it. 1963 * 1964 * Have sillyrename use link instead of rename if possible, 1965 * so that we don't lose the file if the rename fails, and so 1966 * that there's no window when the "to" file doesn't exist. 1967 */ 1968 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1969 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp, true)) { 1970 VN_KNOTE(tvp, NOTE_DELETE); 1971 vput(tvp); 1972 tvp = NULL; 1973 } 1974 1975 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1976 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1977 curlwp); 1978 1979 VN_KNOTE(fdvp, NOTE_WRITE); 1980 VN_KNOTE(tdvp, NOTE_WRITE); 1981 if (error == 0 || error == EEXIST) { 1982 if (fvp->v_type == VDIR) 1983 cache_purge(fvp); 1984 else 1985 cache_purge1(fdvp, fcnp, 0); 1986 if (tvp != NULL && tvp->v_type == VDIR) 1987 cache_purge(tvp); 1988 else 1989 cache_purge1(tdvp, tcnp, 0); 1990 } 1991 out: 1992 if (tdvp == tvp) 1993 vrele(tdvp); 1994 else 1995 vput(tdvp); 1996 if (tvp) 1997 vput(tvp); 1998 vrele(fdvp); 1999 vrele(fvp); 2000 return (error); 2001 } 2002 2003 /* 2004 * nfs file rename rpc called from nfs_remove() above 2005 */ 2006 int 2007 nfs_renameit(sdvp, scnp, sp) 2008 struct vnode *sdvp; 2009 struct componentname *scnp; 2010 struct sillyrename *sp; 2011 { 2012 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 2013 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, curlwp)); 2014 } 2015 2016 /* 2017 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 2018 */ 2019 int 2020 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, l) 2021 struct vnode *fdvp; 2022 const char *fnameptr; 2023 int fnamelen; 2024 struct vnode *tdvp; 2025 const char *tnameptr; 2026 int tnamelen; 2027 kauth_cred_t cred; 2028 struct lwp *l; 2029 { 2030 u_int32_t *tl; 2031 char *cp; 2032 #ifndef NFS_V2_ONLY 2033 int32_t t1; 2034 char *cp2; 2035 #endif 2036 int32_t t2; 2037 char *bpos, *dpos; 2038 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 2039 struct mbuf *mreq, *mrep, *md, *mb; 2040 const int v3 = NFS_ISV3(fdvp); 2041 int rexmit = 0; 2042 struct nfsnode *fdnp = VTONFS(fdvp); 2043 2044 nfsstats.rpccnt[NFSPROC_RENAME]++; 2045 nfsm_reqhead(fdnp, NFSPROC_RENAME, 2046 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 2047 nfsm_rndup(tnamelen)); 2048 nfsm_fhtom(fdnp, v3); 2049 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 2050 nfsm_fhtom(VTONFS(tdvp), v3); 2051 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 2052 nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); 2053 #ifndef NFS_V2_ONLY 2054 if (v3) { 2055 nfsm_wcc_data(fdvp, fwccflag, 0, !error); 2056 nfsm_wcc_data(tdvp, twccflag, 0, !error); 2057 } 2058 #endif 2059 nfsm_reqdone; 2060 VTONFS(fdvp)->n_flag |= NMODIFIED; 2061 VTONFS(tdvp)->n_flag |= NMODIFIED; 2062 if (!fwccflag) 2063 NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); 2064 if (!twccflag) 2065 NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); 2066 /* 2067 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 2068 */ 2069 if (rexmit && error == ENOENT) 2070 error = 0; 2071 return (error); 2072 } 2073 2074 /* 2075 * NFS link RPC, called from nfs_link. 2076 * Assumes dvp and vp locked, and leaves them that way. 2077 */ 2078 2079 static int 2080 nfs_linkrpc(struct vnode *dvp, struct vnode *vp, const char *name, 2081 size_t namelen, kauth_cred_t cred, struct lwp *l) 2082 { 2083 u_int32_t *tl; 2084 char *cp; 2085 #ifndef NFS_V2_ONLY 2086 int32_t t1; 2087 char *cp2; 2088 #endif 2089 int32_t t2; 2090 char *bpos, *dpos; 2091 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 2092 struct mbuf *mreq, *mrep, *md, *mb; 2093 const int v3 = NFS_ISV3(dvp); 2094 int rexmit = 0; 2095 struct nfsnode *np = VTONFS(vp); 2096 2097 nfsstats.rpccnt[NFSPROC_LINK]++; 2098 nfsm_reqhead(np, NFSPROC_LINK, 2099 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(namelen)); 2100 nfsm_fhtom(np, v3); 2101 nfsm_fhtom(VTONFS(dvp), v3); 2102 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 2103 nfsm_request1(np, NFSPROC_LINK, l, cred, &rexmit); 2104 #ifndef NFS_V2_ONLY 2105 if (v3) { 2106 nfsm_postop_attr(vp, attrflag, 0); 2107 nfsm_wcc_data(dvp, wccflag, 0, !error); 2108 } 2109 #endif 2110 nfsm_reqdone; 2111 2112 VTONFS(dvp)->n_flag |= NMODIFIED; 2113 if (!attrflag) 2114 NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); 2115 if (!wccflag) 2116 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2117 2118 /* 2119 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2120 */ 2121 if (rexmit && error == EEXIST) 2122 error = 0; 2123 2124 return error; 2125 } 2126 2127 /* 2128 * nfs hard link create call 2129 */ 2130 int 2131 nfs_link(v) 2132 void *v; 2133 { 2134 struct vop_link_args /* { 2135 struct vnode *a_dvp; 2136 struct vnode *a_vp; 2137 struct componentname *a_cnp; 2138 } */ *ap = v; 2139 struct vnode *vp = ap->a_vp; 2140 struct vnode *dvp = ap->a_dvp; 2141 struct componentname *cnp = ap->a_cnp; 2142 int error = 0; 2143 2144 if (dvp->v_mount != vp->v_mount) { 2145 VOP_ABORTOP(dvp, cnp); 2146 vput(dvp); 2147 return (EXDEV); 2148 } 2149 if (dvp != vp) { 2150 error = vn_lock(vp, LK_EXCLUSIVE); 2151 if (error != 0) { 2152 VOP_ABORTOP(dvp, cnp); 2153 vput(dvp); 2154 return error; 2155 } 2156 } 2157 2158 /* 2159 * Push all writes to the server, so that the attribute cache 2160 * doesn't get "out of sync" with the server. 2161 * XXX There should be a better way! 2162 */ 2163 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0); 2164 2165 error = nfs_linkrpc(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 2166 cnp->cn_cred, curlwp); 2167 2168 if (error == 0) 2169 cache_purge1(dvp, cnp, 0); 2170 PNBUF_PUT(cnp->cn_pnbuf); 2171 if (dvp != vp) 2172 VOP_UNLOCK(vp, 0); 2173 VN_KNOTE(vp, NOTE_LINK); 2174 VN_KNOTE(dvp, NOTE_WRITE); 2175 vput(dvp); 2176 return (error); 2177 } 2178 2179 /* 2180 * nfs symbolic link create call 2181 */ 2182 int 2183 nfs_symlink(v) 2184 void *v; 2185 { 2186 struct vop_symlink_args /* { 2187 struct vnode *a_dvp; 2188 struct vnode **a_vpp; 2189 struct componentname *a_cnp; 2190 struct vattr *a_vap; 2191 char *a_target; 2192 } */ *ap = v; 2193 struct vnode *dvp = ap->a_dvp; 2194 struct vattr *vap = ap->a_vap; 2195 struct componentname *cnp = ap->a_cnp; 2196 struct nfsv2_sattr *sp; 2197 u_int32_t *tl; 2198 char *cp; 2199 int32_t t1, t2; 2200 char *bpos, *dpos, *cp2; 2201 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2202 struct mbuf *mreq, *mrep, *md, *mb; 2203 struct vnode *newvp = (struct vnode *)0; 2204 const int v3 = NFS_ISV3(dvp); 2205 int rexmit = 0; 2206 struct nfsnode *dnp = VTONFS(dvp); 2207 2208 *ap->a_vpp = NULL; 2209 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2210 slen = strlen(ap->a_target); 2211 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2212 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2213 nfsm_fhtom(dnp, v3); 2214 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2215 #ifndef NFS_V2_ONlY 2216 if (v3) 2217 nfsm_v3attrbuild(vap, false); 2218 #endif 2219 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2220 #ifndef NFS_V2_ONlY 2221 if (!v3) { 2222 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2223 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2224 sp->sa_uid = nfs_xdrneg1; 2225 sp->sa_gid = nfs_xdrneg1; 2226 sp->sa_size = nfs_xdrneg1; 2227 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2228 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2229 } 2230 #endif 2231 nfsm_request1(dnp, NFSPROC_SYMLINK, curlwp, cnp->cn_cred, 2232 &rexmit); 2233 #ifndef NFS_V2_ONlY 2234 if (v3) { 2235 if (!error) 2236 nfsm_mtofh(dvp, newvp, v3, gotvp); 2237 nfsm_wcc_data(dvp, wccflag, 0, !error); 2238 } 2239 #endif 2240 nfsm_reqdone; 2241 /* 2242 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2243 */ 2244 if (rexmit && error == EEXIST) 2245 error = 0; 2246 if (error == 0 || error == EEXIST) 2247 cache_purge1(dvp, cnp, 0); 2248 if (error == 0 && newvp == NULL) { 2249 struct nfsnode *np = NULL; 2250 2251 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2252 cnp->cn_cred, curlwp, &np); 2253 if (error == 0) 2254 newvp = NFSTOV(np); 2255 } 2256 if (error) { 2257 if (newvp != NULL) 2258 vput(newvp); 2259 } else { 2260 *ap->a_vpp = newvp; 2261 } 2262 PNBUF_PUT(cnp->cn_pnbuf); 2263 VTONFS(dvp)->n_flag |= NMODIFIED; 2264 if (!wccflag) 2265 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2266 VN_KNOTE(dvp, NOTE_WRITE); 2267 vput(dvp); 2268 return (error); 2269 } 2270 2271 /* 2272 * nfs make dir call 2273 */ 2274 int 2275 nfs_mkdir(v) 2276 void *v; 2277 { 2278 struct vop_mkdir_args /* { 2279 struct vnode *a_dvp; 2280 struct vnode **a_vpp; 2281 struct componentname *a_cnp; 2282 struct vattr *a_vap; 2283 } */ *ap = v; 2284 struct vnode *dvp = ap->a_dvp; 2285 struct vattr *vap = ap->a_vap; 2286 struct componentname *cnp = ap->a_cnp; 2287 struct nfsv2_sattr *sp; 2288 u_int32_t *tl; 2289 char *cp; 2290 int32_t t1, t2; 2291 int len; 2292 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2293 struct vnode *newvp = (struct vnode *)0; 2294 char *bpos, *dpos, *cp2; 2295 int error = 0, wccflag = NFSV3_WCCRATTR; 2296 int gotvp = 0; 2297 int rexmit = 0; 2298 struct mbuf *mreq, *mrep, *md, *mb; 2299 const int v3 = NFS_ISV3(dvp); 2300 2301 len = cnp->cn_namelen; 2302 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2303 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2304 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2305 nfsm_fhtom(dnp, v3); 2306 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2307 #ifndef NFS_V2_ONLY 2308 if (v3) { 2309 nfsm_v3attrbuild(vap, false); 2310 } else 2311 #endif 2312 { 2313 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2314 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2315 sp->sa_uid = nfs_xdrneg1; 2316 sp->sa_gid = nfs_xdrneg1; 2317 sp->sa_size = nfs_xdrneg1; 2318 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2319 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2320 } 2321 nfsm_request1(dnp, NFSPROC_MKDIR, curlwp, cnp->cn_cred, &rexmit); 2322 if (!error) 2323 nfsm_mtofh(dvp, newvp, v3, gotvp); 2324 if (v3) 2325 nfsm_wcc_data(dvp, wccflag, 0, !error); 2326 nfsm_reqdone; 2327 VTONFS(dvp)->n_flag |= NMODIFIED; 2328 if (!wccflag) 2329 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2330 /* 2331 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2332 * if we can succeed in looking up the directory. 2333 */ 2334 if ((rexmit && error == EEXIST) || (!error && !gotvp)) { 2335 if (newvp) { 2336 vput(newvp); 2337 newvp = (struct vnode *)0; 2338 } 2339 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2340 curlwp, &np); 2341 if (!error) { 2342 newvp = NFSTOV(np); 2343 if (newvp->v_type != VDIR || newvp == dvp) 2344 error = EEXIST; 2345 } 2346 } 2347 if (error) { 2348 if (newvp) { 2349 if (dvp != newvp) 2350 vput(newvp); 2351 else 2352 vrele(newvp); 2353 } 2354 } else { 2355 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2356 if (cnp->cn_flags & MAKEENTRY) 2357 nfs_cache_enter(dvp, newvp, cnp); 2358 *ap->a_vpp = newvp; 2359 } 2360 PNBUF_PUT(cnp->cn_pnbuf); 2361 vput(dvp); 2362 return (error); 2363 } 2364 2365 /* 2366 * nfs remove directory call 2367 */ 2368 int 2369 nfs_rmdir(v) 2370 void *v; 2371 { 2372 struct vop_rmdir_args /* { 2373 struct vnode *a_dvp; 2374 struct vnode *a_vp; 2375 struct componentname *a_cnp; 2376 } */ *ap = v; 2377 struct vnode *vp = ap->a_vp; 2378 struct vnode *dvp = ap->a_dvp; 2379 struct componentname *cnp = ap->a_cnp; 2380 u_int32_t *tl; 2381 char *cp; 2382 #ifndef NFS_V2_ONLY 2383 int32_t t1; 2384 char *cp2; 2385 #endif 2386 int32_t t2; 2387 char *bpos, *dpos; 2388 int error = 0, wccflag = NFSV3_WCCRATTR; 2389 int rexmit = 0; 2390 struct mbuf *mreq, *mrep, *md, *mb; 2391 const int v3 = NFS_ISV3(dvp); 2392 struct nfsnode *dnp; 2393 2394 if (dvp == vp) { 2395 vrele(dvp); 2396 vput(dvp); 2397 PNBUF_PUT(cnp->cn_pnbuf); 2398 return (EINVAL); 2399 } 2400 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2401 dnp = VTONFS(dvp); 2402 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2403 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2404 nfsm_fhtom(dnp, v3); 2405 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2406 nfsm_request1(dnp, NFSPROC_RMDIR, curlwp, cnp->cn_cred, &rexmit); 2407 #ifndef NFS_V2_ONLY 2408 if (v3) 2409 nfsm_wcc_data(dvp, wccflag, 0, !error); 2410 #endif 2411 nfsm_reqdone; 2412 PNBUF_PUT(cnp->cn_pnbuf); 2413 VTONFS(dvp)->n_flag |= NMODIFIED; 2414 if (!wccflag) 2415 NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); 2416 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2417 VN_KNOTE(vp, NOTE_DELETE); 2418 cache_purge(vp); 2419 vput(vp); 2420 vput(dvp); 2421 /* 2422 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2423 */ 2424 if (rexmit && error == ENOENT) 2425 error = 0; 2426 return (error); 2427 } 2428 2429 /* 2430 * nfs readdir call 2431 */ 2432 int 2433 nfs_readdir(v) 2434 void *v; 2435 { 2436 struct vop_readdir_args /* { 2437 struct vnode *a_vp; 2438 struct uio *a_uio; 2439 kauth_cred_t a_cred; 2440 int *a_eofflag; 2441 off_t **a_cookies; 2442 int *a_ncookies; 2443 } */ *ap = v; 2444 struct vnode *vp = ap->a_vp; 2445 struct uio *uio = ap->a_uio; 2446 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2447 char *base = uio->uio_iov->iov_base; 2448 int tresid, error; 2449 size_t count, lost; 2450 struct dirent *dp; 2451 off_t *cookies = NULL; 2452 int ncookies = 0, nc; 2453 2454 if (vp->v_type != VDIR) 2455 return (EPERM); 2456 2457 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2458 count = uio->uio_resid - lost; 2459 if (count <= 0) 2460 return (EINVAL); 2461 2462 /* 2463 * Call nfs_bioread() to do the real work. 2464 */ 2465 tresid = uio->uio_resid = count; 2466 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2467 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2468 2469 if (!error && ap->a_cookies) { 2470 ncookies = count / 16; 2471 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2472 *ap->a_cookies = cookies; 2473 } 2474 2475 if (!error && uio->uio_resid == tresid) { 2476 uio->uio_resid += lost; 2477 nfsstats.direofcache_misses++; 2478 if (ap->a_cookies) 2479 *ap->a_ncookies = 0; 2480 *ap->a_eofflag = 1; 2481 return (0); 2482 } 2483 2484 if (!error && ap->a_cookies) { 2485 /* 2486 * Only the NFS server and emulations use cookies, and they 2487 * load the directory block into system space, so we can 2488 * just look at it directly. 2489 */ 2490 if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || 2491 uio->uio_iovcnt != 1) 2492 panic("nfs_readdir: lost in space"); 2493 for (nc = 0; ncookies-- && 2494 base < (char *)uio->uio_iov->iov_base; nc++){ 2495 dp = (struct dirent *) base; 2496 if (dp->d_reclen == 0) 2497 break; 2498 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2499 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2500 else 2501 *(cookies++) = NFS_GETCOOKIE(dp); 2502 base += dp->d_reclen; 2503 } 2504 uio->uio_resid += 2505 ((char *)uio->uio_iov->iov_base - base); 2506 uio->uio_iov->iov_len += 2507 ((char *)uio->uio_iov->iov_base - base); 2508 uio->uio_iov->iov_base = base; 2509 *ap->a_ncookies = nc; 2510 } 2511 2512 uio->uio_resid += lost; 2513 *ap->a_eofflag = 0; 2514 return (error); 2515 } 2516 2517 /* 2518 * Readdir rpc call. 2519 * Called from below the buffer cache by nfs_doio(). 2520 */ 2521 int 2522 nfs_readdirrpc(vp, uiop, cred) 2523 struct vnode *vp; 2524 struct uio *uiop; 2525 kauth_cred_t cred; 2526 { 2527 int len, left; 2528 struct dirent *dp = NULL; 2529 u_int32_t *tl; 2530 char *cp; 2531 int32_t t1, t2; 2532 char *bpos, *dpos, *cp2; 2533 struct mbuf *mreq, *mrep, *md, *mb; 2534 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2535 struct nfsnode *dnp = VTONFS(vp); 2536 u_quad_t fileno; 2537 int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; 2538 #ifndef NFS_V2_ONLY 2539 int attrflag; 2540 #endif 2541 int nrpcs = 0, reclen; 2542 const int v3 = NFS_ISV3(vp); 2543 2544 #ifdef DIAGNOSTIC 2545 /* 2546 * Should be called from buffer cache, so only amount of 2547 * NFS_DIRBLKSIZ will be requested. 2548 */ 2549 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2550 panic("nfs readdirrpc bad uio"); 2551 #endif 2552 2553 /* 2554 * Loop around doing readdir rpc's of size nm_readdirsize 2555 * truncated to a multiple of NFS_DIRFRAGSIZ. 2556 * The stopping criteria is EOF or buffer full. 2557 */ 2558 while (more_dirs && bigenough) { 2559 /* 2560 * Heuristic: don't bother to do another RPC to further 2561 * fill up this block if there is not much room left. (< 50% 2562 * of the readdir RPC size). This wastes some buffer space 2563 * but can save up to 50% in RPC calls. 2564 */ 2565 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2566 bigenough = 0; 2567 break; 2568 } 2569 nfsstats.rpccnt[NFSPROC_READDIR]++; 2570 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2571 NFSX_READDIR(v3)); 2572 nfsm_fhtom(dnp, v3); 2573 #ifndef NFS_V2_ONLY 2574 if (v3) { 2575 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2576 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2577 txdr_swapcookie3(uiop->uio_offset, tl); 2578 } else { 2579 txdr_cookie3(uiop->uio_offset, tl); 2580 } 2581 tl += 2; 2582 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2583 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2584 } else 2585 #endif 2586 { 2587 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2588 *tl++ = txdr_unsigned(uiop->uio_offset); 2589 } 2590 *tl = txdr_unsigned(nmp->nm_readdirsize); 2591 nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); 2592 nrpcs++; 2593 #ifndef NFS_V2_ONLY 2594 if (v3) { 2595 nfsm_postop_attr(vp, attrflag, 0); 2596 if (!error) { 2597 nfsm_dissect(tl, u_int32_t *, 2598 2 * NFSX_UNSIGNED); 2599 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2600 dnp->n_cookieverf.nfsuquad[1] = *tl; 2601 } else { 2602 m_freem(mrep); 2603 goto nfsmout; 2604 } 2605 } 2606 #endif 2607 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2608 more_dirs = fxdr_unsigned(int, *tl); 2609 2610 /* loop thru the dir entries, doctoring them to 4bsd form */ 2611 while (more_dirs && bigenough) { 2612 #ifndef NFS_V2_ONLY 2613 if (v3) { 2614 nfsm_dissect(tl, u_int32_t *, 2615 3 * NFSX_UNSIGNED); 2616 fileno = fxdr_hyper(tl); 2617 len = fxdr_unsigned(int, *(tl + 2)); 2618 } else 2619 #endif 2620 { 2621 nfsm_dissect(tl, u_int32_t *, 2622 2 * NFSX_UNSIGNED); 2623 fileno = fxdr_unsigned(u_quad_t, *tl++); 2624 len = fxdr_unsigned(int, *tl); 2625 } 2626 if (len <= 0 || len > NFS_MAXNAMLEN) { 2627 error = EBADRPC; 2628 m_freem(mrep); 2629 goto nfsmout; 2630 } 2631 /* for cookie stashing */ 2632 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2633 left = NFS_DIRFRAGSIZ - blksiz; 2634 if (reclen > left) { 2635 memset(uiop->uio_iov->iov_base, 0, left); 2636 dp->d_reclen += left; 2637 UIO_ADVANCE(uiop, left); 2638 blksiz = 0; 2639 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2640 } 2641 if (reclen > uiop->uio_resid) 2642 bigenough = 0; 2643 if (bigenough) { 2644 int tlen; 2645 2646 dp = (struct dirent *)uiop->uio_iov->iov_base; 2647 dp->d_fileno = fileno; 2648 dp->d_namlen = len; 2649 dp->d_reclen = reclen; 2650 dp->d_type = DT_UNKNOWN; 2651 blksiz += reclen; 2652 if (blksiz == NFS_DIRFRAGSIZ) 2653 blksiz = 0; 2654 UIO_ADVANCE(uiop, DIRHDSIZ); 2655 nfsm_mtouio(uiop, len); 2656 tlen = reclen - (DIRHDSIZ + len); 2657 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2658 UIO_ADVANCE(uiop, tlen); 2659 } else 2660 nfsm_adv(nfsm_rndup(len)); 2661 #ifndef NFS_V2_ONLY 2662 if (v3) { 2663 nfsm_dissect(tl, u_int32_t *, 2664 3 * NFSX_UNSIGNED); 2665 } else 2666 #endif 2667 { 2668 nfsm_dissect(tl, u_int32_t *, 2669 2 * NFSX_UNSIGNED); 2670 } 2671 if (bigenough) { 2672 #ifndef NFS_V2_ONLY 2673 if (v3) { 2674 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2675 uiop->uio_offset = 2676 fxdr_swapcookie3(tl); 2677 else 2678 uiop->uio_offset = 2679 fxdr_cookie3(tl); 2680 } 2681 else 2682 #endif 2683 { 2684 uiop->uio_offset = 2685 fxdr_unsigned(off_t, *tl); 2686 } 2687 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2688 } 2689 if (v3) 2690 tl += 2; 2691 else 2692 tl++; 2693 more_dirs = fxdr_unsigned(int, *tl); 2694 } 2695 /* 2696 * If at end of rpc data, get the eof boolean 2697 */ 2698 if (!more_dirs) { 2699 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2700 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2701 2702 /* 2703 * kludge: if we got no entries, treat it as EOF. 2704 * some server sometimes send a reply without any 2705 * entries or EOF. 2706 * although it might mean the server has very long name, 2707 * we can't handle such entries anyway. 2708 */ 2709 2710 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2711 more_dirs = 0; 2712 } 2713 m_freem(mrep); 2714 } 2715 /* 2716 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2717 * by increasing d_reclen for the last record. 2718 */ 2719 if (blksiz > 0) { 2720 left = NFS_DIRFRAGSIZ - blksiz; 2721 memset(uiop->uio_iov->iov_base, 0, left); 2722 dp->d_reclen += left; 2723 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2724 UIO_ADVANCE(uiop, left); 2725 } 2726 2727 /* 2728 * We are now either at the end of the directory or have filled the 2729 * block. 2730 */ 2731 if (bigenough) { 2732 dnp->n_direofoffset = uiop->uio_offset; 2733 dnp->n_flag |= NEOFVALID; 2734 } 2735 nfsmout: 2736 return (error); 2737 } 2738 2739 #ifndef NFS_V2_ONLY 2740 /* 2741 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2742 */ 2743 int 2744 nfs_readdirplusrpc(vp, uiop, cred) 2745 struct vnode *vp; 2746 struct uio *uiop; 2747 kauth_cred_t cred; 2748 { 2749 int len, left; 2750 struct dirent *dp = NULL; 2751 u_int32_t *tl; 2752 char *cp; 2753 int32_t t1, t2; 2754 struct vnode *newvp; 2755 char *bpos, *dpos, *cp2; 2756 struct mbuf *mreq, *mrep, *md, *mb; 2757 struct nameidata nami, *ndp = &nami; 2758 struct componentname *cnp = &ndp->ni_cnd; 2759 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2760 struct nfsnode *dnp = VTONFS(vp), *np; 2761 nfsfh_t *fhp; 2762 u_quad_t fileno; 2763 int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2764 int attrflag, fhsize, nrpcs = 0, reclen; 2765 struct nfs_fattr fattr, *fp; 2766 2767 #ifdef DIAGNOSTIC 2768 if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) 2769 panic("nfs readdirplusrpc bad uio"); 2770 #endif 2771 ndp->ni_dvp = vp; 2772 newvp = NULLVP; 2773 2774 /* 2775 * Loop around doing readdir rpc's of size nm_readdirsize 2776 * truncated to a multiple of NFS_DIRFRAGSIZ. 2777 * The stopping criteria is EOF or buffer full. 2778 */ 2779 while (more_dirs && bigenough) { 2780 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2781 bigenough = 0; 2782 break; 2783 } 2784 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2785 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2786 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2787 nfsm_fhtom(dnp, 1); 2788 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2789 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2790 txdr_swapcookie3(uiop->uio_offset, tl); 2791 } else { 2792 txdr_cookie3(uiop->uio_offset, tl); 2793 } 2794 tl += 2; 2795 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2796 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2797 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2798 *tl = txdr_unsigned(nmp->nm_rsize); 2799 nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); 2800 nfsm_postop_attr(vp, attrflag, 0); 2801 if (error) { 2802 m_freem(mrep); 2803 goto nfsmout; 2804 } 2805 nrpcs++; 2806 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2807 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2808 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2809 more_dirs = fxdr_unsigned(int, *tl); 2810 2811 /* loop thru the dir entries, doctoring them to 4bsd form */ 2812 while (more_dirs && bigenough) { 2813 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2814 fileno = fxdr_hyper(tl); 2815 len = fxdr_unsigned(int, *(tl + 2)); 2816 if (len <= 0 || len > NFS_MAXNAMLEN) { 2817 error = EBADRPC; 2818 m_freem(mrep); 2819 goto nfsmout; 2820 } 2821 /* for cookie stashing */ 2822 reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); 2823 left = NFS_DIRFRAGSIZ - blksiz; 2824 if (reclen > left) { 2825 /* 2826 * DIRFRAGSIZ is aligned, no need to align 2827 * again here. 2828 */ 2829 memset(uiop->uio_iov->iov_base, 0, left); 2830 dp->d_reclen += left; 2831 UIO_ADVANCE(uiop, left); 2832 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2833 blksiz = 0; 2834 } 2835 if (reclen > uiop->uio_resid) 2836 bigenough = 0; 2837 if (bigenough) { 2838 int tlen; 2839 2840 dp = (struct dirent *)uiop->uio_iov->iov_base; 2841 dp->d_fileno = fileno; 2842 dp->d_namlen = len; 2843 dp->d_reclen = reclen; 2844 dp->d_type = DT_UNKNOWN; 2845 blksiz += reclen; 2846 if (blksiz == NFS_DIRFRAGSIZ) 2847 blksiz = 0; 2848 UIO_ADVANCE(uiop, DIRHDSIZ); 2849 nfsm_mtouio(uiop, len); 2850 tlen = reclen - (DIRHDSIZ + len); 2851 (void)memset(uiop->uio_iov->iov_base, 0, tlen); 2852 UIO_ADVANCE(uiop, tlen); 2853 cnp->cn_nameptr = dp->d_name; 2854 cnp->cn_namelen = dp->d_namlen; 2855 } else 2856 nfsm_adv(nfsm_rndup(len)); 2857 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2858 if (bigenough) { 2859 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2860 uiop->uio_offset = 2861 fxdr_swapcookie3(tl); 2862 else 2863 uiop->uio_offset = 2864 fxdr_cookie3(tl); 2865 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2866 } 2867 tl += 2; 2868 2869 /* 2870 * Since the attributes are before the file handle 2871 * (sigh), we must skip over the attributes and then 2872 * come back and get them. 2873 */ 2874 attrflag = fxdr_unsigned(int, *tl); 2875 if (attrflag) { 2876 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2877 memcpy(&fattr, fp, NFSX_V3FATTR); 2878 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2879 doit = fxdr_unsigned(int, *tl); 2880 if (doit) { 2881 nfsm_getfh(fhp, fhsize, 1); 2882 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2883 VREF(vp); 2884 newvp = vp; 2885 np = dnp; 2886 } else { 2887 error = nfs_nget1(vp->v_mount, fhp, 2888 fhsize, &np, LK_NOWAIT); 2889 if (!error) 2890 newvp = NFSTOV(np); 2891 } 2892 if (!error) { 2893 const char *xcp; 2894 2895 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2896 if (bigenough) { 2897 dp->d_type = 2898 IFTODT(VTTOIF(np->n_vattr->va_type)); 2899 if (cnp->cn_namelen <= NCHNAMLEN) { 2900 ndp->ni_vp = newvp; 2901 xcp = cnp->cn_nameptr + 2902 cnp->cn_namelen; 2903 cnp->cn_hash = 2904 namei_hash(cnp->cn_nameptr, &xcp); 2905 nfs_cache_enter(ndp->ni_dvp, 2906 ndp->ni_vp, cnp); 2907 } 2908 } 2909 } 2910 error = 0; 2911 } 2912 } else { 2913 /* Just skip over the file handle */ 2914 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2915 i = fxdr_unsigned(int, *tl); 2916 nfsm_adv(nfsm_rndup(i)); 2917 } 2918 if (newvp != NULLVP) { 2919 if (newvp == vp) 2920 vrele(newvp); 2921 else 2922 vput(newvp); 2923 newvp = NULLVP; 2924 } 2925 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2926 more_dirs = fxdr_unsigned(int, *tl); 2927 } 2928 /* 2929 * If at end of rpc data, get the eof boolean 2930 */ 2931 if (!more_dirs) { 2932 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2933 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2934 2935 /* 2936 * kludge: see a comment in nfs_readdirrpc. 2937 */ 2938 2939 if (uiop->uio_resid >= NFS_DIRBLKSIZ) 2940 more_dirs = 0; 2941 } 2942 m_freem(mrep); 2943 } 2944 /* 2945 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2946 * by increasing d_reclen for the last record. 2947 */ 2948 if (blksiz > 0) { 2949 left = NFS_DIRFRAGSIZ - blksiz; 2950 memset(uiop->uio_iov->iov_base, 0, left); 2951 dp->d_reclen += left; 2952 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2953 UIO_ADVANCE(uiop, left); 2954 } 2955 2956 /* 2957 * We are now either at the end of the directory or have filled the 2958 * block. 2959 */ 2960 if (bigenough) { 2961 dnp->n_direofoffset = uiop->uio_offset; 2962 dnp->n_flag |= NEOFVALID; 2963 } 2964 nfsmout: 2965 if (newvp != NULLVP) { 2966 if(newvp == vp) 2967 vrele(newvp); 2968 else 2969 vput(newvp); 2970 } 2971 return (error); 2972 } 2973 #endif 2974 2975 /* 2976 * Silly rename. To make the NFS filesystem that is stateless look a little 2977 * more like the "ufs" a remove of an active vnode is translated to a rename 2978 * to a funny looking filename that is removed by nfs_inactive on the 2979 * nfsnode. There is the potential for another process on a different client 2980 * to create the same funny name between the nfs_lookitup() fails and the 2981 * nfs_rename() completes, but... 2982 */ 2983 int 2984 nfs_sillyrename(dvp, vp, cnp, dolink) 2985 struct vnode *dvp, *vp; 2986 struct componentname *cnp; 2987 bool dolink; 2988 { 2989 struct sillyrename *sp; 2990 struct nfsnode *np; 2991 int error; 2992 short pid; 2993 2994 cache_purge(dvp); 2995 np = VTONFS(vp); 2996 #ifndef DIAGNOSTIC 2997 if (vp->v_type == VDIR) 2998 panic("nfs: sillyrename dir"); 2999 #endif 3000 sp = kmem_alloc(sizeof(*sp), KM_SLEEP); 3001 sp->s_cred = kauth_cred_dup(cnp->cn_cred); 3002 sp->s_dvp = dvp; 3003 VREF(dvp); 3004 3005 /* Fudge together a funny name */ 3006 pid = curlwp->l_proc->p_pid; 3007 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 3008 sp->s_namlen = 12; 3009 sp->s_name[8] = hexdigits[pid & 0xf]; 3010 sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; 3011 sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; 3012 sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; 3013 3014 /* Try lookitups until we get one that isn't there */ 3015 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3016 curlwp, (struct nfsnode **)0) == 0) { 3017 sp->s_name[4]++; 3018 if (sp->s_name[4] > 'z') { 3019 error = EINVAL; 3020 goto bad; 3021 } 3022 } 3023 if (dolink) { 3024 error = nfs_linkrpc(dvp, vp, sp->s_name, sp->s_namlen, 3025 sp->s_cred, curlwp); 3026 /* 3027 * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. 3028 */ 3029 if (error == ENOTSUP) { 3030 error = nfs_renameit(dvp, cnp, sp); 3031 } 3032 } else { 3033 error = nfs_renameit(dvp, cnp, sp); 3034 } 3035 if (error) 3036 goto bad; 3037 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 3038 curlwp, &np); 3039 np->n_sillyrename = sp; 3040 return (0); 3041 bad: 3042 vrele(sp->s_dvp); 3043 kauth_cred_free(sp->s_cred); 3044 kmem_free(sp, sizeof(*sp)); 3045 return (error); 3046 } 3047 3048 /* 3049 * Look up a file name and optionally either update the file handle or 3050 * allocate an nfsnode, depending on the value of npp. 3051 * npp == NULL --> just do the lookup 3052 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 3053 * handled too 3054 * *npp != NULL --> update the file handle in the vnode 3055 */ 3056 int 3057 nfs_lookitup(dvp, name, len, cred, l, npp) 3058 struct vnode *dvp; 3059 const char *name; 3060 int len; 3061 kauth_cred_t cred; 3062 struct lwp *l; 3063 struct nfsnode **npp; 3064 { 3065 u_int32_t *tl; 3066 char *cp; 3067 int32_t t1, t2; 3068 struct vnode *newvp = (struct vnode *)0; 3069 struct nfsnode *np, *dnp = VTONFS(dvp); 3070 char *bpos, *dpos, *cp2; 3071 int error = 0, fhlen; 3072 #ifndef NFS_V2_ONLY 3073 int attrflag; 3074 #endif 3075 struct mbuf *mreq, *mrep, *md, *mb; 3076 nfsfh_t *nfhp; 3077 const int v3 = NFS_ISV3(dvp); 3078 3079 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 3080 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 3081 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 3082 nfsm_fhtom(dnp, v3); 3083 nfsm_strtom(name, len, NFS_MAXNAMLEN); 3084 nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); 3085 if (npp && !error) { 3086 nfsm_getfh(nfhp, fhlen, v3); 3087 if (*npp) { 3088 np = *npp; 3089 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 3090 kmem_free(np->n_fhp, np->n_fhsize); 3091 np->n_fhp = &np->n_fh; 3092 } 3093 #if NFS_SMALLFH < NFSX_V3FHMAX 3094 else if (np->n_fhsize <= NFS_SMALLFH && fhlen > NFS_SMALLFH) 3095 np->n_fhp = kmem_alloc(fhlen, KM_SLEEP); 3096 #endif 3097 memcpy(np->n_fhp, nfhp, fhlen); 3098 np->n_fhsize = fhlen; 3099 newvp = NFSTOV(np); 3100 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 3101 VREF(dvp); 3102 newvp = dvp; 3103 np = dnp; 3104 } else { 3105 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 3106 if (error) { 3107 m_freem(mrep); 3108 return (error); 3109 } 3110 newvp = NFSTOV(np); 3111 } 3112 #ifndef NFS_V2_ONLY 3113 if (v3) { 3114 nfsm_postop_attr(newvp, attrflag, 0); 3115 if (!attrflag && *npp == NULL) { 3116 m_freem(mrep); 3117 vput(newvp); 3118 return (ENOENT); 3119 } 3120 } else 3121 #endif 3122 nfsm_loadattr(newvp, (struct vattr *)0, 0); 3123 } 3124 nfsm_reqdone; 3125 if (npp && *npp == NULL) { 3126 if (error) { 3127 if (newvp) 3128 vput(newvp); 3129 } else 3130 *npp = np; 3131 } 3132 return (error); 3133 } 3134 3135 #ifndef NFS_V2_ONLY 3136 /* 3137 * Nfs Version 3 commit rpc 3138 */ 3139 int 3140 nfs_commit(vp, offset, cnt, l) 3141 struct vnode *vp; 3142 off_t offset; 3143 uint32_t cnt; 3144 struct lwp *l; 3145 { 3146 char *cp; 3147 u_int32_t *tl; 3148 int32_t t1, t2; 3149 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 3150 char *bpos, *dpos, *cp2; 3151 int error = 0, wccflag = NFSV3_WCCRATTR; 3152 struct mbuf *mreq, *mrep, *md, *mb; 3153 struct nfsnode *np; 3154 3155 KASSERT(NFS_ISV3(vp)); 3156 3157 #ifdef NFS_DEBUG_COMMIT 3158 printf("commit %lu - %lu\n", (unsigned long)offset, 3159 (unsigned long)(offset + cnt)); 3160 #endif 3161 3162 mutex_enter(&nmp->nm_lock); 3163 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 3164 mutex_exit(&nmp->nm_lock); 3165 return (0); 3166 } 3167 mutex_exit(&nmp->nm_lock); 3168 nfsstats.rpccnt[NFSPROC_COMMIT]++; 3169 np = VTONFS(vp); 3170 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 3171 nfsm_fhtom(np, 1); 3172 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3173 txdr_hyper(offset, tl); 3174 tl += 2; 3175 *tl = txdr_unsigned(cnt); 3176 nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); 3177 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, false); 3178 if (!error) { 3179 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 3180 mutex_enter(&nmp->nm_lock); 3181 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 3182 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 3183 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 3184 error = NFSERR_STALEWRITEVERF; 3185 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 3186 } 3187 mutex_exit(&nmp->nm_lock); 3188 } 3189 nfsm_reqdone; 3190 return (error); 3191 } 3192 #endif 3193 3194 /* 3195 * Kludge City.. 3196 * - make nfs_bmap() essentially a no-op that does no translation 3197 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 3198 * (Maybe I could use the process's page mapping, but I was concerned that 3199 * Kernel Write might not be enabled and also figured copyout() would do 3200 * a lot more work than memcpy() and also it currently happens in the 3201 * context of the swapper process (2). 3202 */ 3203 int 3204 nfs_bmap(v) 3205 void *v; 3206 { 3207 struct vop_bmap_args /* { 3208 struct vnode *a_vp; 3209 daddr_t a_bn; 3210 struct vnode **a_vpp; 3211 daddr_t *a_bnp; 3212 int *a_runp; 3213 } */ *ap = v; 3214 struct vnode *vp = ap->a_vp; 3215 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 3216 3217 if (ap->a_vpp != NULL) 3218 *ap->a_vpp = vp; 3219 if (ap->a_bnp != NULL) 3220 *ap->a_bnp = ap->a_bn << bshift; 3221 if (ap->a_runp != NULL) 3222 *ap->a_runp = 1024 * 1024; /* XXX */ 3223 return (0); 3224 } 3225 3226 /* 3227 * Strategy routine. 3228 * For async requests when nfsiod(s) are running, queue the request by 3229 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3230 * request. 3231 */ 3232 int 3233 nfs_strategy(v) 3234 void *v; 3235 { 3236 struct vop_strategy_args *ap = v; 3237 struct buf *bp = ap->a_bp; 3238 int error = 0; 3239 3240 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3241 panic("nfs physio/async"); 3242 3243 /* 3244 * If the op is asynchronous and an i/o daemon is waiting 3245 * queue the request, wake it up and wait for completion 3246 * otherwise just do it ourselves. 3247 */ 3248 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) 3249 error = nfs_doio(bp); 3250 return (error); 3251 } 3252 3253 /* 3254 * fsync vnode op. Just call nfs_flush() with commit == 1. 3255 */ 3256 /* ARGSUSED */ 3257 int 3258 nfs_fsync(v) 3259 void *v; 3260 { 3261 struct vop_fsync_args /* { 3262 struct vnodeop_desc *a_desc; 3263 struct vnode * a_vp; 3264 kauth_cred_t a_cred; 3265 int a_flags; 3266 off_t offlo; 3267 off_t offhi; 3268 struct lwp * a_l; 3269 } */ *ap = v; 3270 3271 struct vnode *vp = ap->a_vp; 3272 3273 if (vp->v_type != VREG) 3274 return 0; 3275 3276 return (nfs_flush(vp, ap->a_cred, 3277 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, curlwp, 1)); 3278 } 3279 3280 /* 3281 * Flush all the data associated with a vnode. 3282 */ 3283 int 3284 nfs_flush(struct vnode *vp, kauth_cred_t cred, int waitfor, struct lwp *l, 3285 int commit) 3286 { 3287 struct nfsnode *np = VTONFS(vp); 3288 int error; 3289 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3290 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3291 3292 mutex_enter(&vp->v_interlock); 3293 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3294 if (np->n_flag & NWRITEERR) { 3295 error = np->n_error; 3296 np->n_flag &= ~NWRITEERR; 3297 } 3298 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3299 return (error); 3300 } 3301 3302 /* 3303 * Return POSIX pathconf information applicable to nfs. 3304 * 3305 * N.B. The NFS V2 protocol doesn't support this RPC. 3306 */ 3307 /* ARGSUSED */ 3308 int 3309 nfs_pathconf(v) 3310 void *v; 3311 { 3312 struct vop_pathconf_args /* { 3313 struct vnode *a_vp; 3314 int a_name; 3315 register_t *a_retval; 3316 } */ *ap = v; 3317 struct nfsv3_pathconf *pcp; 3318 struct vnode *vp = ap->a_vp; 3319 struct mbuf *mreq, *mrep, *md, *mb; 3320 int32_t t1, t2; 3321 u_int32_t *tl; 3322 char *bpos, *dpos, *cp, *cp2; 3323 int error = 0, attrflag; 3324 #ifndef NFS_V2_ONLY 3325 struct nfsmount *nmp; 3326 unsigned int l; 3327 u_int64_t maxsize; 3328 #endif 3329 const int v3 = NFS_ISV3(vp); 3330 struct nfsnode *np = VTONFS(vp); 3331 3332 switch (ap->a_name) { 3333 /* Names that can be resolved locally. */ 3334 case _PC_PIPE_BUF: 3335 *ap->a_retval = PIPE_BUF; 3336 break; 3337 case _PC_SYNC_IO: 3338 *ap->a_retval = 1; 3339 break; 3340 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3341 case _PC_LINK_MAX: 3342 case _PC_NAME_MAX: 3343 case _PC_CHOWN_RESTRICTED: 3344 case _PC_NO_TRUNC: 3345 if (!v3) { 3346 error = EINVAL; 3347 break; 3348 } 3349 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3350 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3351 nfsm_fhtom(np, 1); 3352 nfsm_request(np, NFSPROC_PATHCONF, 3353 curlwp, curlwp->l_cred); /* XXX */ 3354 nfsm_postop_attr(vp, attrflag, 0); 3355 if (!error) { 3356 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3357 NFSX_V3PATHCONF); 3358 switch (ap->a_name) { 3359 case _PC_LINK_MAX: 3360 *ap->a_retval = 3361 fxdr_unsigned(register_t, pcp->pc_linkmax); 3362 break; 3363 case _PC_NAME_MAX: 3364 *ap->a_retval = 3365 fxdr_unsigned(register_t, pcp->pc_namemax); 3366 break; 3367 case _PC_CHOWN_RESTRICTED: 3368 *ap->a_retval = 3369 (pcp->pc_chownrestricted == nfs_true); 3370 break; 3371 case _PC_NO_TRUNC: 3372 *ap->a_retval = 3373 (pcp->pc_notrunc == nfs_true); 3374 break; 3375 } 3376 } 3377 nfsm_reqdone; 3378 break; 3379 case _PC_FILESIZEBITS: 3380 #ifndef NFS_V2_ONLY 3381 if (v3) { 3382 nmp = VFSTONFS(vp->v_mount); 3383 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3384 if ((error = nfs_fsinfo(nmp, vp, 3385 curlwp->l_cred, curlwp)) != 0) /* XXX */ 3386 break; 3387 for (l = 0, maxsize = nmp->nm_maxfilesize; 3388 (maxsize >> l) > 0; l++) 3389 ; 3390 *ap->a_retval = l + 1; 3391 } else 3392 #endif 3393 { 3394 *ap->a_retval = 32; /* NFS V2 limitation */ 3395 } 3396 break; 3397 default: 3398 error = EINVAL; 3399 break; 3400 } 3401 3402 return (error); 3403 } 3404 3405 /* 3406 * NFS advisory byte-level locks. 3407 */ 3408 int 3409 nfs_advlock(v) 3410 void *v; 3411 { 3412 struct vop_advlock_args /* { 3413 struct vnode *a_vp; 3414 void *a_id; 3415 int a_op; 3416 struct flock *a_fl; 3417 int a_flags; 3418 } */ *ap = v; 3419 struct nfsnode *np = VTONFS(ap->a_vp); 3420 3421 return lf_advlock(ap, &np->n_lockf, np->n_size); 3422 } 3423 3424 /* 3425 * Print out the contents of an nfsnode. 3426 */ 3427 int 3428 nfs_print(v) 3429 void *v; 3430 { 3431 struct vop_print_args /* { 3432 struct vnode *a_vp; 3433 } */ *ap = v; 3434 struct vnode *vp = ap->a_vp; 3435 struct nfsnode *np = VTONFS(vp); 3436 3437 printf("tag VT_NFS, fileid %lld fsid 0x%lx", 3438 (unsigned long long)np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3439 if (vp->v_type == VFIFO) 3440 fifo_printinfo(vp); 3441 printf("\n"); 3442 return (0); 3443 } 3444 3445 /* 3446 * nfs unlock wrapper. 3447 */ 3448 int 3449 nfs_unlock(void *v) 3450 { 3451 struct vop_unlock_args /* { 3452 struct vnode *a_vp; 3453 int a_flags; 3454 } */ *ap = v; 3455 struct vnode *vp = ap->a_vp; 3456 3457 /* 3458 * VOP_UNLOCK can be called by nfs_loadattrcache 3459 * with v_data == 0. 3460 */ 3461 if (VTONFS(vp)) { 3462 nfs_delayedtruncate(vp); 3463 } 3464 3465 return genfs_unlock(v); 3466 } 3467 3468 /* 3469 * nfs special file access vnode op. 3470 * Essentially just get vattr and then imitate iaccess() since the device is 3471 * local to the client. 3472 */ 3473 int 3474 nfsspec_access(v) 3475 void *v; 3476 { 3477 struct vop_access_args /* { 3478 struct vnode *a_vp; 3479 int a_mode; 3480 kauth_cred_t a_cred; 3481 struct lwp *a_l; 3482 } */ *ap = v; 3483 struct vattr va; 3484 struct vnode *vp = ap->a_vp; 3485 int error; 3486 3487 error = VOP_GETATTR(vp, &va, ap->a_cred); 3488 if (error) 3489 return (error); 3490 3491 /* 3492 * Disallow write attempts on filesystems mounted read-only; 3493 * unless the file is a socket, fifo, or a block or character 3494 * device resident on the filesystem. 3495 */ 3496 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3497 switch (vp->v_type) { 3498 case VREG: 3499 case VDIR: 3500 case VLNK: 3501 return (EROFS); 3502 default: 3503 break; 3504 } 3505 } 3506 3507 return (vaccess(va.va_type, va.va_mode, 3508 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3509 } 3510 3511 /* 3512 * Read wrapper for special devices. 3513 */ 3514 int 3515 nfsspec_read(v) 3516 void *v; 3517 { 3518 struct vop_read_args /* { 3519 struct vnode *a_vp; 3520 struct uio *a_uio; 3521 int a_ioflag; 3522 kauth_cred_t a_cred; 3523 } */ *ap = v; 3524 struct nfsnode *np = VTONFS(ap->a_vp); 3525 3526 /* 3527 * Set access flag. 3528 */ 3529 np->n_flag |= NACC; 3530 getnanotime(&np->n_atim); 3531 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3532 } 3533 3534 /* 3535 * Write wrapper for special devices. 3536 */ 3537 int 3538 nfsspec_write(v) 3539 void *v; 3540 { 3541 struct vop_write_args /* { 3542 struct vnode *a_vp; 3543 struct uio *a_uio; 3544 int a_ioflag; 3545 kauth_cred_t a_cred; 3546 } */ *ap = v; 3547 struct nfsnode *np = VTONFS(ap->a_vp); 3548 3549 /* 3550 * Set update flag. 3551 */ 3552 np->n_flag |= NUPD; 3553 getnanotime(&np->n_mtim); 3554 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3555 } 3556 3557 /* 3558 * Close wrapper for special devices. 3559 * 3560 * Update the times on the nfsnode then do device close. 3561 */ 3562 int 3563 nfsspec_close(v) 3564 void *v; 3565 { 3566 struct vop_close_args /* { 3567 struct vnode *a_vp; 3568 int a_fflag; 3569 kauth_cred_t a_cred; 3570 struct lwp *a_l; 3571 } */ *ap = v; 3572 struct vnode *vp = ap->a_vp; 3573 struct nfsnode *np = VTONFS(vp); 3574 struct vattr vattr; 3575 3576 if (np->n_flag & (NACC | NUPD)) { 3577 np->n_flag |= NCHG; 3578 if (vp->v_usecount == 1 && 3579 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3580 VATTR_NULL(&vattr); 3581 if (np->n_flag & NACC) 3582 vattr.va_atime = np->n_atim; 3583 if (np->n_flag & NUPD) 3584 vattr.va_mtime = np->n_mtim; 3585 (void)VOP_SETATTR(vp, &vattr, ap->a_cred); 3586 } 3587 } 3588 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3589 } 3590 3591 /* 3592 * Read wrapper for fifos. 3593 */ 3594 int 3595 nfsfifo_read(v) 3596 void *v; 3597 { 3598 struct vop_read_args /* { 3599 struct vnode *a_vp; 3600 struct uio *a_uio; 3601 int a_ioflag; 3602 kauth_cred_t a_cred; 3603 } */ *ap = v; 3604 struct nfsnode *np = VTONFS(ap->a_vp); 3605 3606 /* 3607 * Set access flag. 3608 */ 3609 np->n_flag |= NACC; 3610 getnanotime(&np->n_atim); 3611 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3612 } 3613 3614 /* 3615 * Write wrapper for fifos. 3616 */ 3617 int 3618 nfsfifo_write(v) 3619 void *v; 3620 { 3621 struct vop_write_args /* { 3622 struct vnode *a_vp; 3623 struct uio *a_uio; 3624 int a_ioflag; 3625 kauth_cred_t a_cred; 3626 } */ *ap = v; 3627 struct nfsnode *np = VTONFS(ap->a_vp); 3628 3629 /* 3630 * Set update flag. 3631 */ 3632 np->n_flag |= NUPD; 3633 getnanotime(&np->n_mtim); 3634 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3635 } 3636 3637 /* 3638 * Close wrapper for fifos. 3639 * 3640 * Update the times on the nfsnode then do fifo close. 3641 */ 3642 int 3643 nfsfifo_close(v) 3644 void *v; 3645 { 3646 struct vop_close_args /* { 3647 struct vnode *a_vp; 3648 int a_fflag; 3649 kauth_cred_t a_cred; 3650 struct lwp *a_l; 3651 } */ *ap = v; 3652 struct vnode *vp = ap->a_vp; 3653 struct nfsnode *np = VTONFS(vp); 3654 struct vattr vattr; 3655 3656 if (np->n_flag & (NACC | NUPD)) { 3657 struct timespec ts; 3658 3659 getnanotime(&ts); 3660 if (np->n_flag & NACC) 3661 np->n_atim = ts; 3662 if (np->n_flag & NUPD) 3663 np->n_mtim = ts; 3664 np->n_flag |= NCHG; 3665 if (vp->v_usecount == 1 && 3666 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3667 VATTR_NULL(&vattr); 3668 if (np->n_flag & NACC) 3669 vattr.va_atime = np->n_atim; 3670 if (np->n_flag & NUPD) 3671 vattr.va_mtime = np->n_mtim; 3672 (void)VOP_SETATTR(vp, &vattr, ap->a_cred); 3673 } 3674 } 3675 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3676 } 3677
Indexes created Wed Oct 15 07:09:58 GMT 2025