nfs_vnops.c revision 1.137.2.1
1 /* $NetBSD: nfs_vnops.c,v 1.137.2.1 2001/09/18 19:13:59 fvdl Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include "opt_nfs.h" 46 #include "opt_uvmhist.h" 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/resourcevar.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/malloc.h> 57 #include <sys/mbuf.h> 58 #include <sys/namei.h> 59 #include <sys/vnode.h> 60 #include <sys/dirent.h> 61 #include <sys/fcntl.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/unistd.h> 65 66 #include <uvm/uvm_extern.h> 67 #include <uvm/uvm.h> 68 69 #include <miscfs/fifofs/fifo.h> 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsproto.h> 75 #include <nfs/nfs.h> 76 #include <nfs/nfsnode.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/xdr_subs.h> 79 #include <nfs/nfsm_subs.h> 80 #include <nfs/nqnfs.h> 81 #include <nfs/nfs_var.h> 82 83 #include <net/if.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 87 /* Defs */ 88 #define TRUE 1 89 #define FALSE 0 90 91 /* 92 * Global vfs data structures for nfs 93 */ 94 int (**nfsv2_vnodeop_p) __P((void *)); 95 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 96 { &vop_default_desc, vn_default_error }, 97 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 98 { &vop_create_desc, nfs_create }, /* create */ 99 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 100 { &vop_open_desc, nfs_open }, /* open */ 101 { &vop_close_desc, nfs_close }, /* close */ 102 { &vop_access_desc, nfs_access }, /* access */ 103 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 104 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 105 { &vop_read_desc, nfs_read }, /* read */ 106 { &vop_write_desc, nfs_write }, /* write */ 107 { &vop_lease_desc, nfs_lease_check }, /* lease */ 108 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, nfs_poll }, /* poll */ 111 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 112 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 113 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 114 { &vop_seek_desc, nfs_seek }, /* seek */ 115 { &vop_remove_desc, nfs_remove }, /* remove */ 116 { &vop_link_desc, nfs_link }, /* link */ 117 { &vop_rename_desc, nfs_rename }, /* rename */ 118 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 119 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 120 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 121 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 122 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 123 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 124 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 125 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 126 { &vop_lock_desc, nfs_lock }, /* lock */ 127 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 128 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 129 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 130 { &vop_print_desc, nfs_print }, /* print */ 131 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 132 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 133 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 134 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 135 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 136 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 137 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 138 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 139 { &vop_update_desc, nfs_update }, /* update */ 140 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 141 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 142 { &vop_putpages_desc, nfs_putpages }, /* putpages */ 143 { NULL, NULL } 144 }; 145 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 146 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 147 148 /* 149 * Special device vnode ops 150 */ 151 int (**spec_nfsv2nodeop_p) __P((void *)); 152 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 153 { &vop_default_desc, vn_default_error }, 154 { &vop_lookup_desc, spec_lookup }, /* lookup */ 155 { &vop_create_desc, spec_create }, /* create */ 156 { &vop_mknod_desc, spec_mknod }, /* mknod */ 157 { &vop_open_desc, spec_open }, /* open */ 158 { &vop_close_desc, nfsspec_close }, /* close */ 159 { &vop_access_desc, nfsspec_access }, /* access */ 160 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 161 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 162 { &vop_read_desc, nfsspec_read }, /* read */ 163 { &vop_write_desc, nfsspec_write }, /* write */ 164 { &vop_lease_desc, spec_lease_check }, /* lease */ 165 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 166 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 167 { &vop_poll_desc, spec_poll }, /* poll */ 168 { &vop_revoke_desc, spec_revoke }, /* revoke */ 169 { &vop_mmap_desc, spec_mmap }, /* mmap */ 170 { &vop_fsync_desc, spec_fsync }, /* fsync */ 171 { &vop_seek_desc, spec_seek }, /* seek */ 172 { &vop_remove_desc, spec_remove }, /* remove */ 173 { &vop_link_desc, spec_link }, /* link */ 174 { &vop_rename_desc, spec_rename }, /* rename */ 175 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 176 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 177 { &vop_symlink_desc, spec_symlink }, /* symlink */ 178 { &vop_readdir_desc, spec_readdir }, /* readdir */ 179 { &vop_readlink_desc, spec_readlink }, /* readlink */ 180 { &vop_abortop_desc, spec_abortop }, /* abortop */ 181 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 182 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 183 { &vop_lock_desc, nfs_lock }, /* lock */ 184 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 185 { &vop_bmap_desc, spec_bmap }, /* bmap */ 186 { &vop_strategy_desc, spec_strategy }, /* strategy */ 187 { &vop_print_desc, nfs_print }, /* print */ 188 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 189 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 190 { &vop_advlock_desc, spec_advlock }, /* advlock */ 191 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 192 { &vop_valloc_desc, spec_valloc }, /* valloc */ 193 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 194 { &vop_vfree_desc, spec_vfree }, /* vfree */ 195 { &vop_truncate_desc, spec_truncate }, /* truncate */ 196 { &vop_update_desc, nfs_update }, /* update */ 197 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 198 { &vop_getpages_desc, spec_getpages }, /* getpages */ 199 { &vop_putpages_desc, spec_putpages }, /* putpages */ 200 { &vop_size_desc, spec_size }, /* size */ 201 { NULL, NULL } 202 }; 203 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 204 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 205 206 int (**fifo_nfsv2nodeop_p) __P((void *)); 207 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 208 { &vop_default_desc, vn_default_error }, 209 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 210 { &vop_create_desc, fifo_create }, /* create */ 211 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 212 { &vop_open_desc, fifo_open }, /* open */ 213 { &vop_close_desc, nfsfifo_close }, /* close */ 214 { &vop_access_desc, nfsspec_access }, /* access */ 215 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 216 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 217 { &vop_read_desc, nfsfifo_read }, /* read */ 218 { &vop_write_desc, nfsfifo_write }, /* write */ 219 { &vop_lease_desc, fifo_lease_check }, /* lease */ 220 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 221 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 222 { &vop_poll_desc, fifo_poll }, /* poll */ 223 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 224 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 225 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 226 { &vop_seek_desc, fifo_seek }, /* seek */ 227 { &vop_remove_desc, fifo_remove }, /* remove */ 228 { &vop_link_desc, fifo_link }, /* link */ 229 { &vop_rename_desc, fifo_rename }, /* rename */ 230 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 231 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 232 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 233 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 234 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 235 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 236 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 237 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 238 { &vop_lock_desc, nfs_lock }, /* lock */ 239 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 240 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 241 { &vop_strategy_desc, genfs_badop }, /* strategy */ 242 { &vop_print_desc, nfs_print }, /* print */ 243 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 244 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 245 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 246 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 247 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 248 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 249 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 250 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 251 { &vop_update_desc, nfs_update }, /* update */ 252 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 253 { NULL, NULL } 254 }; 255 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 256 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 257 258 /* 259 * Global variables 260 */ 261 extern u_int32_t nfs_true, nfs_false; 262 extern u_int32_t nfs_xdrneg1; 263 extern struct nfsstats nfsstats; 264 extern nfstype nfsv3_type[9]; 265 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 266 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 267 int nfs_numasync = 0; 268 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 269 270 /* 271 * nfs null call from vfs. 272 */ 273 int 274 nfs_null(vp, cred, procp) 275 struct vnode *vp; 276 struct ucred *cred; 277 struct proc *procp; 278 { 279 caddr_t bpos, dpos; 280 int error = 0; 281 struct mbuf *mreq, *mrep, *md, *mb; 282 283 nfsm_reqhead(vp, NFSPROC_NULL, 0); 284 nfsm_request(vp, NFSPROC_NULL, procp, cred); 285 nfsm_reqdone; 286 return (error); 287 } 288 289 /* 290 * nfs access vnode op. 291 * For nfs version 2, just return ok. File accesses may fail later. 292 * For nfs version 3, use the access rpc to check accessibility. If file modes 293 * are changed on the server, accesses might still fail later. 294 */ 295 int 296 nfs_access(v) 297 void *v; 298 { 299 struct vop_access_args /* { 300 struct vnode *a_vp; 301 int a_mode; 302 struct ucred *a_cred; 303 struct proc *a_p; 304 } */ *ap = v; 305 struct vnode *vp = ap->a_vp; 306 u_int32_t *tl; 307 caddr_t cp; 308 int32_t t1, t2; 309 caddr_t bpos, dpos, cp2; 310 int error = 0, attrflag, cachevalid; 311 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 312 u_int32_t mode, rmode; 313 const int v3 = NFS_ISV3(vp); 314 struct nfsnode *np = VTONFS(vp); 315 316 cachevalid = (np->n_accstamp != -1 && 317 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 318 np->n_accuid == ap->a_cred->cr_uid); 319 320 /* 321 * Check access cache first. If this request has been made for this 322 * uid shortly before, use the cached result. 323 */ 324 if (cachevalid) { 325 if (!np->n_accerror) { 326 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 327 return np->n_accerror; 328 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 329 return np->n_accerror; 330 } 331 332 /* 333 * For nfs v3, do an access rpc, otherwise you are stuck emulating 334 * ufs_access() locally using the vattr. This may not be correct, 335 * since the server may apply other access criteria such as 336 * client uid-->server uid mapping that we do not know about, but 337 * this is better than just returning anything that is lying about 338 * in the cache. 339 */ 340 if (v3) { 341 nfsstats.rpccnt[NFSPROC_ACCESS]++; 342 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 343 nfsm_fhtom(vp, v3); 344 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 345 if (ap->a_mode & VREAD) 346 mode = NFSV3ACCESS_READ; 347 else 348 mode = 0; 349 if (vp->v_type != VDIR) { 350 if (ap->a_mode & VWRITE) 351 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 352 if (ap->a_mode & VEXEC) 353 mode |= NFSV3ACCESS_EXECUTE; 354 } else { 355 if (ap->a_mode & VWRITE) 356 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 357 NFSV3ACCESS_DELETE); 358 if (ap->a_mode & VEXEC) 359 mode |= NFSV3ACCESS_LOOKUP; 360 } 361 *tl = txdr_unsigned(mode); 362 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 363 nfsm_postop_attr(vp, attrflag); 364 if (!error) { 365 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 366 rmode = fxdr_unsigned(u_int32_t, *tl); 367 /* 368 * The NFS V3 spec does not clarify whether or not 369 * the returned access bits can be a superset of 370 * the ones requested, so... 371 */ 372 if ((rmode & mode) != mode) 373 error = EACCES; 374 } 375 nfsm_reqdone; 376 } else 377 return (nfsspec_access(ap)); 378 /* 379 * Disallow write attempts on filesystems mounted read-only; 380 * unless the file is a socket, fifo, or a block or character 381 * device resident on the filesystem. 382 */ 383 if (!error && (ap->a_mode & VWRITE) && 384 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 385 switch (vp->v_type) { 386 case VREG: 387 case VDIR: 388 case VLNK: 389 error = EROFS; 390 default: 391 break; 392 } 393 } 394 395 if (!error || error == EACCES) { 396 /* 397 * If we got the same result as for a previous, 398 * different request, OR it in. Don't update 399 * the timestamp in that case. 400 */ 401 if (cachevalid && error == np->n_accerror) { 402 if (!error) 403 np->n_accmode |= ap->a_mode; 404 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 405 np->n_accmode = ap->a_mode; 406 } else { 407 np->n_accstamp = time.tv_sec; 408 np->n_accuid = ap->a_cred->cr_uid; 409 np->n_accmode = ap->a_mode; 410 np->n_accerror = error; 411 } 412 } 413 414 return (error); 415 } 416 417 /* 418 * nfs open vnode op 419 * Check to see if the type is ok 420 * and that deletion is not in progress. 421 * For paged in text files, you will need to flush the page cache 422 * if consistency is lost. 423 */ 424 /* ARGSUSED */ 425 int 426 nfs_open(v) 427 void *v; 428 { 429 struct vop_open_args /* { 430 struct vnode *a_vp; 431 int a_mode; 432 struct ucred *a_cred; 433 struct proc *a_p; 434 struct vnode *a_vpp; 435 } */ *ap = v; 436 struct vnode *vp = ap->a_vp; 437 struct nfsnode *np = VTONFS(vp); 438 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 439 struct vattr vattr; 440 int error; 441 442 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 443 return (EACCES); 444 } 445 446 /* 447 * Initialize read and write creds here, for swapfiles 448 * and other paths that don't set the creds themselves. 449 */ 450 451 if (ap->a_mode & FREAD) { 452 if (np->n_rcred) { 453 crfree(np->n_rcred); 454 } 455 np->n_rcred = ap->a_cred; 456 crhold(np->n_rcred); 457 } 458 if (ap->a_mode & FWRITE) { 459 if (np->n_wcred) { 460 crfree(np->n_wcred); 461 } 462 np->n_wcred = ap->a_cred; 463 crhold(np->n_wcred); 464 } 465 466 #ifndef NFS_V2_ONLY 467 /* 468 * Get a valid lease. If cached data is stale, flush it. 469 */ 470 if (nmp->nm_flag & NFSMNT_NQNFS) { 471 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 472 do { 473 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 474 ap->a_p); 475 } while (error == NQNFS_EXPIRED); 476 if (error) 477 return (error); 478 if (np->n_lrev != np->n_brev || 479 (np->n_flag & NQNFSNONCACHE)) { 480 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 481 ap->a_p, 1)) == EINTR) 482 return (error); 483 np->n_brev = np->n_lrev; 484 } 485 } 486 } else 487 #endif 488 { 489 if (np->n_flag & NMODIFIED) { 490 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 491 ap->a_p, 1)) == EINTR) 492 return (error); 493 np->n_attrstamp = 0; 494 if (vp->v_type == VDIR) { 495 nfs_invaldircache(vp, 0); 496 np->n_direofoffset = 0; 497 } 498 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 499 if (error) 500 return (error); 501 np->n_mtime = vattr.va_mtime.tv_sec; 502 } else { 503 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 504 if (error) 505 return (error); 506 if (np->n_mtime != vattr.va_mtime.tv_sec) { 507 if (vp->v_type == VDIR) { 508 nfs_invaldircache(vp, 0); 509 np->n_direofoffset = 0; 510 } 511 if ((error = nfs_vinvalbuf(vp, V_SAVE, 512 ap->a_cred, ap->a_p, 1)) == EINTR) 513 return (error); 514 np->n_mtime = vattr.va_mtime.tv_sec; 515 } 516 } 517 } 518 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 519 np->n_attrstamp = 0; /* For Open/Close consistency */ 520 return (0); 521 } 522 523 /* 524 * nfs close vnode op 525 * What an NFS client should do upon close after writing is a debatable issue. 526 * Most NFS clients push delayed writes to the server upon close, basically for 527 * two reasons: 528 * 1 - So that any write errors may be reported back to the client process 529 * doing the close system call. By far the two most likely errors are 530 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 531 * 2 - To put a worst case upper bound on cache inconsistency between 532 * multiple clients for the file. 533 * There is also a consistency problem for Version 2 of the protocol w.r.t. 534 * not being able to tell if other clients are writing a file concurrently, 535 * since there is no way of knowing if the changed modify time in the reply 536 * is only due to the write for this client. 537 * (NFS Version 3 provides weak cache consistency data in the reply that 538 * should be sufficient to detect and handle this case.) 539 * 540 * The current code does the following: 541 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 542 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 543 * or commit them (this satisfies 1 and 2 except for the 544 * case where the server crashes after this close but 545 * before the commit RPC, which is felt to be "good 546 * enough". Changing the last argument to nfs_flush() to 547 * a 1 would force a commit operation, if it is felt a 548 * commit is necessary now. 549 * for NQNFS - do nothing now, since 2 is dealt with via leases and 550 * 1 should be dealt with via an fsync() system call for 551 * cases where write errors are important. 552 */ 553 /* ARGSUSED */ 554 int 555 nfs_close(v) 556 void *v; 557 { 558 struct vop_close_args /* { 559 struct vnodeop_desc *a_desc; 560 struct vnode *a_vp; 561 int a_fflag; 562 struct ucred *a_cred; 563 struct proc *a_p; 564 } */ *ap = v; 565 struct vnode *vp = ap->a_vp; 566 struct nfsnode *np = VTONFS(vp); 567 int error = 0; 568 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 569 570 if (vp->v_type == VREG) { 571 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 572 (np->n_flag & NMODIFIED)) { 573 if (NFS_ISV3(vp)) { 574 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 575 np->n_flag &= ~NMODIFIED; 576 } else 577 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 578 np->n_attrstamp = 0; 579 } 580 if (np->n_flag & NWRITEERR) { 581 np->n_flag &= ~NWRITEERR; 582 error = np->n_error; 583 } 584 } 585 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 586 return (error); 587 } 588 589 /* 590 * nfs getattr call from vfs. 591 */ 592 int 593 nfs_getattr(v) 594 void *v; 595 { 596 struct vop_getattr_args /* { 597 struct vnode *a_vp; 598 struct vattr *a_vap; 599 struct ucred *a_cred; 600 struct proc *a_p; 601 } */ *ap = v; 602 struct vnode *vp = ap->a_vp; 603 struct nfsnode *np = VTONFS(vp); 604 caddr_t cp; 605 u_int32_t *tl; 606 int32_t t1, t2; 607 caddr_t bpos, dpos; 608 int error = 0; 609 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 610 const int v3 = NFS_ISV3(vp); 611 612 /* 613 * Update local times for special files. 614 */ 615 if (np->n_flag & (NACC | NUPD)) 616 np->n_flag |= NCHG; 617 /* 618 * First look in the cache. 619 */ 620 if (nfs_getattrcache(vp, ap->a_vap) == 0) 621 return (0); 622 nfsstats.rpccnt[NFSPROC_GETATTR]++; 623 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 624 nfsm_fhtom(vp, v3); 625 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 626 if (!error) { 627 nfsm_loadattr(vp, ap->a_vap); 628 if (vp->v_type == VDIR && 629 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 630 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 631 } 632 nfsm_reqdone; 633 return (error); 634 } 635 636 /* 637 * nfs setattr call. 638 */ 639 int 640 nfs_setattr(v) 641 void *v; 642 { 643 struct vop_setattr_args /* { 644 struct vnodeop_desc *a_desc; 645 struct vnode *a_vp; 646 struct vattr *a_vap; 647 struct ucred *a_cred; 648 struct proc *a_p; 649 } */ *ap = v; 650 struct vnode *vp = ap->a_vp; 651 struct nfsnode *np = VTONFS(vp); 652 struct vattr *vap = ap->a_vap; 653 int error = 0; 654 u_quad_t tsize = 0; 655 656 /* 657 * Setting of flags is not supported. 658 */ 659 if (vap->va_flags != VNOVAL) 660 return (EOPNOTSUPP); 661 662 /* 663 * Disallow write attempts if the filesystem is mounted read-only. 664 */ 665 if ((vap->va_uid != (uid_t)VNOVAL || 666 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 667 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 668 (vp->v_mount->mnt_flag & MNT_RDONLY)) 669 return (EROFS); 670 if (vap->va_size != VNOVAL) { 671 switch (vp->v_type) { 672 case VDIR: 673 return (EISDIR); 674 case VCHR: 675 case VBLK: 676 case VSOCK: 677 case VFIFO: 678 if (vap->va_mtime.tv_sec == VNOVAL && 679 vap->va_atime.tv_sec == VNOVAL && 680 vap->va_mode == (mode_t)VNOVAL && 681 vap->va_uid == (uid_t)VNOVAL && 682 vap->va_gid == (gid_t)VNOVAL) 683 return (0); 684 vap->va_size = VNOVAL; 685 break; 686 default: 687 /* 688 * Disallow write attempts if the filesystem is 689 * mounted read-only. 690 */ 691 if (vp->v_mount->mnt_flag & MNT_RDONLY) 692 return (EROFS); 693 uvm_vnp_setsize(vp, vap->va_size); 694 if (vap->va_size == 0) 695 error = nfs_vinvalbuf(vp, 0, 696 ap->a_cred, ap->a_p, 1); 697 else 698 error = nfs_vinvalbuf(vp, V_SAVE, 699 ap->a_cred, ap->a_p, 1); 700 if (error) { 701 uvm_vnp_setsize(vp, np->n_size); 702 return (error); 703 } 704 tsize = np->n_size; 705 np->n_size = np->n_vattr->va_size = vap->va_size; 706 } 707 } else if ((vap->va_mtime.tv_sec != VNOVAL || 708 vap->va_atime.tv_sec != VNOVAL) && 709 vp->v_type == VREG && 710 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 711 ap->a_p, 1)) == EINTR) 712 return (error); 713 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 714 if (error && vap->va_size != VNOVAL) { 715 np->n_size = np->n_vattr->va_size = tsize; 716 uvm_vnp_setsize(vp, np->n_size); 717 } 718 return (error); 719 } 720 721 /* 722 * Do an nfs setattr rpc. 723 */ 724 int 725 nfs_setattrrpc(vp, vap, cred, procp) 726 struct vnode *vp; 727 struct vattr *vap; 728 struct ucred *cred; 729 struct proc *procp; 730 { 731 struct nfsv2_sattr *sp; 732 caddr_t cp; 733 int32_t t1, t2; 734 caddr_t bpos, dpos, cp2; 735 u_int32_t *tl; 736 int error = 0, wccflag = NFSV3_WCCRATTR; 737 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 738 const int v3 = NFS_ISV3(vp); 739 740 nfsstats.rpccnt[NFSPROC_SETATTR]++; 741 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 742 nfsm_fhtom(vp, v3); 743 if (v3) { 744 nfsm_v3attrbuild(vap, TRUE); 745 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 746 *tl = nfs_false; 747 } else { 748 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 749 if (vap->va_mode == (mode_t)VNOVAL) 750 sp->sa_mode = nfs_xdrneg1; 751 else 752 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 753 if (vap->va_uid == (uid_t)VNOVAL) 754 sp->sa_uid = nfs_xdrneg1; 755 else 756 sp->sa_uid = txdr_unsigned(vap->va_uid); 757 if (vap->va_gid == (gid_t)VNOVAL) 758 sp->sa_gid = nfs_xdrneg1; 759 else 760 sp->sa_gid = txdr_unsigned(vap->va_gid); 761 sp->sa_size = txdr_unsigned(vap->va_size); 762 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 763 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 764 } 765 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 766 if (v3) { 767 nfsm_wcc_data(vp, wccflag); 768 } else 769 nfsm_loadattr(vp, (struct vattr *)0); 770 nfsm_reqdone; 771 return (error); 772 } 773 774 /* 775 * nfs lookup call, one step at a time... 776 * First look in cache 777 * If not found, unlock the directory nfsnode and do the rpc 778 * 779 * This code is full of lock/unlock statements and checks, because 780 * we continue after cache_lookup has finished (we need to check 781 * with the attr cache and do an rpc if it has timed out). This means 782 * that the locking effects of cache_lookup have to be taken into 783 * account. 784 */ 785 int 786 nfs_lookup(v) 787 void *v; 788 { 789 struct vop_lookup_args /* { 790 struct vnodeop_desc *a_desc; 791 struct vnode *a_dvp; 792 struct vnode **a_vpp; 793 struct componentname *a_cnp; 794 } */ *ap = v; 795 struct componentname *cnp = ap->a_cnp; 796 struct vnode *dvp = ap->a_dvp; 797 struct vnode **vpp = ap->a_vpp; 798 int flags; 799 struct vnode *newvp; 800 u_int32_t *tl; 801 caddr_t cp; 802 int32_t t1, t2; 803 struct nfsmount *nmp; 804 caddr_t bpos, dpos, cp2; 805 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 806 long len; 807 nfsfh_t *fhp; 808 struct nfsnode *np; 809 int lockparent, wantparent, error = 0, attrflag, fhsize; 810 const int v3 = NFS_ISV3(dvp); 811 812 cnp->cn_flags &= ~PDIRUNLOCK; 813 flags = cnp->cn_flags; 814 815 *vpp = NULLVP; 816 newvp = NULLVP; 817 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 818 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 819 return (EROFS); 820 if (dvp->v_type != VDIR) 821 return (ENOTDIR); 822 823 lockparent = flags & LOCKPARENT; 824 wantparent = flags & (LOCKPARENT|WANTPARENT); 825 nmp = VFSTONFS(dvp->v_mount); 826 np = VTONFS(dvp); 827 828 /* 829 * Before tediously performing a linear scan of the directory, 830 * check the name cache to see if the directory/name pair 831 * we are looking for is known already. 832 * If the directory/name pair is found in the name cache, 833 * we have to ensure the directory has not changed from 834 * the time the cache entry has been created. If it has, 835 * the cache entry has to be ignored 836 */ 837 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 838 struct vattr vattr; 839 int err2; 840 841 if (error && error != ENOENT) { 842 *vpp = NULLVP; 843 return error; 844 } 845 846 if (cnp->cn_flags & PDIRUNLOCK) { 847 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 848 if (err2 != 0) { 849 *vpp = NULLVP; 850 return err2; 851 } 852 cnp->cn_flags &= ~PDIRUNLOCK; 853 } 854 855 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 856 if (err2 != 0) { 857 if (error == 0) { 858 if (*vpp != dvp) 859 vput(*vpp); 860 else 861 vrele(*vpp); 862 } 863 *vpp = NULLVP; 864 return err2; 865 } 866 867 if (error == ENOENT) { 868 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 869 cnp->cn_proc) && vattr.va_mtime.tv_sec == 870 VTONFS(dvp)->n_nctime) 871 return ENOENT; 872 cache_purge(dvp); 873 np->n_nctime = 0; 874 goto dorpc; 875 } 876 877 newvp = *vpp; 878 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 879 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 880 { 881 nfsstats.lookupcache_hits++; 882 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 883 cnp->cn_flags |= SAVENAME; 884 if ((!lockparent || !(flags & ISLASTCN)) && 885 newvp != dvp) 886 VOP_UNLOCK(dvp, 0); 887 return (0); 888 } 889 cache_purge(newvp); 890 if (newvp != dvp) 891 vput(newvp); 892 else 893 vrele(newvp); 894 *vpp = NULLVP; 895 } 896 dorpc: 897 error = 0; 898 newvp = NULLVP; 899 nfsstats.lookupcache_misses++; 900 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 901 len = cnp->cn_namelen; 902 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 903 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 904 nfsm_fhtom(dvp, v3); 905 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 906 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 907 if (error) { 908 nfsm_postop_attr(dvp, attrflag); 909 m_freem(mrep); 910 goto nfsmout; 911 } 912 nfsm_getfh(fhp, fhsize, v3); 913 914 /* 915 * Handle RENAME case... 916 */ 917 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 918 if (NFS_CMPFH(np, fhp, fhsize)) { 919 m_freem(mrep); 920 return (EISDIR); 921 } 922 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 923 if (error) { 924 m_freem(mrep); 925 return error; 926 } 927 newvp = NFSTOV(np); 928 if (v3) { 929 nfsm_postop_attr(newvp, attrflag); 930 nfsm_postop_attr(dvp, attrflag); 931 } else 932 nfsm_loadattr(newvp, (struct vattr *)0); 933 *vpp = newvp; 934 m_freem(mrep); 935 cnp->cn_flags |= SAVENAME; 936 if (!lockparent) { 937 VOP_UNLOCK(dvp, 0); 938 cnp->cn_flags |= PDIRUNLOCK; 939 } 940 return (0); 941 } 942 943 /* 944 * The postop attr handling is duplicated for each if case, 945 * because it should be done while dvp is locked (unlocking 946 * dvp is different for each case). 947 */ 948 949 if (NFS_CMPFH(np, fhp, fhsize)) { 950 /* 951 * "." lookup 952 */ 953 VREF(dvp); 954 newvp = dvp; 955 if (v3) { 956 nfsm_postop_attr(newvp, attrflag); 957 nfsm_postop_attr(dvp, attrflag); 958 } else 959 nfsm_loadattr(newvp, (struct vattr *)0); 960 } else if (flags & ISDOTDOT) { 961 /* 962 * ".." lookup 963 */ 964 VOP_UNLOCK(dvp, 0); 965 cnp->cn_flags |= PDIRUNLOCK; 966 967 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 968 if (error) { 969 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 970 cnp->cn_flags &= ~PDIRUNLOCK; 971 m_freem(mrep); 972 return error; 973 } 974 newvp = NFSTOV(np); 975 976 if (v3) { 977 nfsm_postop_attr(newvp, attrflag); 978 nfsm_postop_attr(dvp, attrflag); 979 } else 980 nfsm_loadattr(newvp, (struct vattr *)0); 981 982 if (lockparent && (flags & ISLASTCN)) { 983 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 984 m_freem(mrep); 985 vput(newvp); 986 return error; 987 } 988 cnp->cn_flags &= ~PDIRUNLOCK; 989 } 990 } else { 991 /* 992 * Other lookups. 993 */ 994 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 995 if (error) { 996 m_freem(mrep); 997 return error; 998 } 999 newvp = NFSTOV(np); 1000 if (v3) { 1001 nfsm_postop_attr(newvp, attrflag); 1002 nfsm_postop_attr(dvp, attrflag); 1003 } else 1004 nfsm_loadattr(newvp, (struct vattr *)0); 1005 if (!lockparent || !(flags & ISLASTCN)) { 1006 VOP_UNLOCK(dvp, 0); 1007 cnp->cn_flags |= PDIRUNLOCK; 1008 } 1009 } 1010 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1011 cnp->cn_flags |= SAVENAME; 1012 if ((cnp->cn_flags & MAKEENTRY) && 1013 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1014 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1015 cache_enter(dvp, newvp, cnp); 1016 } 1017 *vpp = newvp; 1018 nfsm_reqdone; 1019 if (error) { 1020 /* 1021 * We get here only because of errors returned by 1022 * the RPC. Otherwise we'll have returned above 1023 * (the nfsm_* macros will jump to nfsm_reqdone 1024 * on error). 1025 */ 1026 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1027 cnp->cn_nameiop != CREATE) { 1028 if (VTONFS(dvp)->n_nctime == 0) 1029 VTONFS(dvp)->n_nctime = 1030 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1031 cache_enter(dvp, NULL, cnp); 1032 } 1033 if (newvp != NULLVP) { 1034 vrele(newvp); 1035 if (newvp != dvp) 1036 VOP_UNLOCK(newvp, 0); 1037 } 1038 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1039 (flags & ISLASTCN) && error == ENOENT) { 1040 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1041 error = EROFS; 1042 else 1043 error = EJUSTRETURN; 1044 } 1045 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1046 cnp->cn_flags |= SAVENAME; 1047 *vpp = NULL; 1048 } 1049 1050 return error; 1051 } 1052 1053 /* 1054 * nfs read call. 1055 * Just call nfs_bioread() to do the work. 1056 */ 1057 int 1058 nfs_read(v) 1059 void *v; 1060 { 1061 struct vop_read_args /* { 1062 struct vnode *a_vp; 1063 struct uio *a_uio; 1064 int a_ioflag; 1065 struct ucred *a_cred; 1066 } */ *ap = v; 1067 struct vnode *vp = ap->a_vp; 1068 1069 if (vp->v_type != VREG) 1070 return (EPERM); 1071 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1072 } 1073 1074 /* 1075 * nfs readlink call 1076 */ 1077 int 1078 nfs_readlink(v) 1079 void *v; 1080 { 1081 struct vop_readlink_args /* { 1082 struct vnode *a_vp; 1083 struct uio *a_uio; 1084 struct ucred *a_cred; 1085 } */ *ap = v; 1086 struct vnode *vp = ap->a_vp; 1087 1088 if (vp->v_type != VLNK) 1089 return (EPERM); 1090 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1091 } 1092 1093 /* 1094 * Do a readlink rpc. 1095 * Called by nfs_doio() from below the buffer cache. 1096 */ 1097 int 1098 nfs_readlinkrpc(vp, uiop, cred) 1099 struct vnode *vp; 1100 struct uio *uiop; 1101 struct ucred *cred; 1102 { 1103 u_int32_t *tl; 1104 caddr_t cp; 1105 int32_t t1, t2; 1106 caddr_t bpos, dpos, cp2; 1107 int error = 0, len, attrflag; 1108 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1109 const int v3 = NFS_ISV3(vp); 1110 1111 nfsstats.rpccnt[NFSPROC_READLINK]++; 1112 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1113 nfsm_fhtom(vp, v3); 1114 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1115 if (v3) 1116 nfsm_postop_attr(vp, attrflag); 1117 if (!error) { 1118 nfsm_strsiz(len, NFS_MAXPATHLEN); 1119 nfsm_mtouio(uiop, len); 1120 } 1121 nfsm_reqdone; 1122 return (error); 1123 } 1124 1125 /* 1126 * nfs read rpc call 1127 * Ditto above 1128 */ 1129 int 1130 nfs_readrpc(vp, uiop) 1131 struct vnode *vp; 1132 struct uio *uiop; 1133 { 1134 u_int32_t *tl; 1135 caddr_t cp; 1136 int32_t t1, t2; 1137 caddr_t bpos, dpos, cp2; 1138 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1139 struct nfsmount *nmp; 1140 int error = 0, len, retlen, tsiz, eof, attrflag; 1141 const int v3 = NFS_ISV3(vp); 1142 1143 #ifndef nolint 1144 eof = 0; 1145 #endif 1146 nmp = VFSTONFS(vp->v_mount); 1147 tsiz = uiop->uio_resid; 1148 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1149 return (EFBIG); 1150 while (tsiz > 0) { 1151 nfsstats.rpccnt[NFSPROC_READ]++; 1152 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1153 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1154 nfsm_fhtom(vp, v3); 1155 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1156 if (v3) { 1157 txdr_hyper(uiop->uio_offset, tl); 1158 *(tl + 2) = txdr_unsigned(len); 1159 } else { 1160 *tl++ = txdr_unsigned(uiop->uio_offset); 1161 *tl++ = txdr_unsigned(len); 1162 *tl = 0; 1163 } 1164 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1165 VTONFS(vp)->n_rcred); 1166 if (v3) { 1167 nfsm_postop_attr(vp, attrflag); 1168 if (error) { 1169 m_freem(mrep); 1170 goto nfsmout; 1171 } 1172 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1173 eof = fxdr_unsigned(int, *(tl + 1)); 1174 } else 1175 nfsm_loadattr(vp, (struct vattr *)0); 1176 nfsm_strsiz(retlen, nmp->nm_rsize); 1177 nfsm_mtouio(uiop, retlen); 1178 m_freem(mrep); 1179 tsiz -= retlen; 1180 if (v3) { 1181 if (eof || retlen == 0) 1182 tsiz = 0; 1183 } else if (retlen < len) 1184 tsiz = 0; 1185 } 1186 nfsmout: 1187 return (error); 1188 } 1189 1190 /* 1191 * nfs write call 1192 */ 1193 int 1194 nfs_writerpc(vp, uiop, iomode, must_commit) 1195 struct vnode *vp; 1196 struct uio *uiop; 1197 int *iomode, *must_commit; 1198 { 1199 u_int32_t *tl; 1200 caddr_t cp; 1201 int32_t t1, t2, backup; 1202 caddr_t bpos, dpos, cp2; 1203 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1204 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1205 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1206 const int v3 = NFS_ISV3(vp); 1207 int committed = NFSV3WRITE_FILESYNC; 1208 1209 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1210 panic("writerpc readonly vp %p", vp); 1211 } 1212 1213 #ifndef DIAGNOSTIC 1214 if (uiop->uio_iovcnt != 1) 1215 panic("nfs: writerpc iovcnt > 1"); 1216 #endif 1217 *must_commit = 0; 1218 tsiz = uiop->uio_resid; 1219 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1220 return (EFBIG); 1221 while (tsiz > 0) { 1222 nfsstats.rpccnt[NFSPROC_WRITE]++; 1223 len = min(tsiz, nmp->nm_wsize); 1224 nfsm_reqhead(vp, NFSPROC_WRITE, 1225 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1226 nfsm_fhtom(vp, v3); 1227 if (v3) { 1228 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1229 txdr_hyper(uiop->uio_offset, tl); 1230 tl += 2; 1231 *tl++ = txdr_unsigned(len); 1232 *tl++ = txdr_unsigned(*iomode); 1233 *tl = txdr_unsigned(len); 1234 } else { 1235 u_int32_t x; 1236 1237 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1238 /* Set both "begin" and "current" to non-garbage. */ 1239 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1240 *tl++ = x; /* "begin offset" */ 1241 *tl++ = x; /* "current offset" */ 1242 x = txdr_unsigned(len); 1243 *tl++ = x; /* total to this offset */ 1244 *tl = x; /* size of this write */ 1245 1246 } 1247 nfsm_uiotom(uiop, len); 1248 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1249 VTONFS(vp)->n_wcred); 1250 if (v3) { 1251 wccflag = NFSV3_WCCCHK; 1252 nfsm_wcc_data(vp, wccflag); 1253 if (!error) { 1254 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1255 + NFSX_V3WRITEVERF); 1256 rlen = fxdr_unsigned(int, *tl++); 1257 if (rlen == 0) { 1258 error = NFSERR_IO; 1259 m_freem(mrep); 1260 break; 1261 } else if (rlen < len) { 1262 backup = len - rlen; 1263 uiop->uio_iov->iov_base = 1264 (caddr_t)uiop->uio_iov->iov_base - 1265 backup; 1266 uiop->uio_iov->iov_len += backup; 1267 uiop->uio_offset -= backup; 1268 uiop->uio_resid += backup; 1269 len = rlen; 1270 } 1271 commit = fxdr_unsigned(int, *tl++); 1272 1273 /* 1274 * Return the lowest committment level 1275 * obtained by any of the RPCs. 1276 */ 1277 if (committed == NFSV3WRITE_FILESYNC) 1278 committed = commit; 1279 else if (committed == NFSV3WRITE_DATASYNC && 1280 commit == NFSV3WRITE_UNSTABLE) 1281 committed = commit; 1282 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1283 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1284 NFSX_V3WRITEVERF); 1285 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1286 } else if (memcmp((caddr_t)tl, 1287 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1288 *must_commit = 1; 1289 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1290 NFSX_V3WRITEVERF); 1291 } 1292 } 1293 } else 1294 nfsm_loadattr(vp, (struct vattr *)0); 1295 if (wccflag) 1296 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1297 m_freem(mrep); 1298 if (error) 1299 break; 1300 tsiz -= len; 1301 } 1302 nfsmout: 1303 *iomode = committed; 1304 if (error) 1305 uiop->uio_resid = tsiz; 1306 return (error); 1307 } 1308 1309 /* 1310 * nfs mknod rpc 1311 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1312 * mode set to specify the file type and the size field for rdev. 1313 */ 1314 int 1315 nfs_mknodrpc(dvp, vpp, cnp, vap) 1316 struct vnode *dvp; 1317 struct vnode **vpp; 1318 struct componentname *cnp; 1319 struct vattr *vap; 1320 { 1321 struct nfsv2_sattr *sp; 1322 u_int32_t *tl; 1323 caddr_t cp; 1324 int32_t t1, t2; 1325 struct vnode *newvp = (struct vnode *)0; 1326 struct nfsnode *np; 1327 char *cp2; 1328 caddr_t bpos, dpos; 1329 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1330 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1331 u_int32_t rdev; 1332 const int v3 = NFS_ISV3(dvp); 1333 1334 if (vap->va_type == VCHR || vap->va_type == VBLK) 1335 rdev = txdr_unsigned(vap->va_rdev); 1336 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1337 rdev = nfs_xdrneg1; 1338 else { 1339 VOP_ABORTOP(dvp, cnp); 1340 vput(dvp); 1341 return (EOPNOTSUPP); 1342 } 1343 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1344 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1345 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1346 nfsm_fhtom(dvp, v3); 1347 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1348 if (v3) { 1349 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1350 *tl++ = vtonfsv3_type(vap->va_type); 1351 nfsm_v3attrbuild(vap, FALSE); 1352 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1353 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1354 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1355 *tl = txdr_unsigned(minor(vap->va_rdev)); 1356 } 1357 } else { 1358 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1359 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1360 sp->sa_uid = nfs_xdrneg1; 1361 sp->sa_gid = nfs_xdrneg1; 1362 sp->sa_size = rdev; 1363 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1364 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1365 } 1366 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1367 if (!error) { 1368 nfsm_mtofh(dvp, newvp, v3, gotvp); 1369 if (!gotvp) { 1370 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1371 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1372 if (!error) 1373 newvp = NFSTOV(np); 1374 } 1375 } 1376 if (v3) 1377 nfsm_wcc_data(dvp, wccflag); 1378 nfsm_reqdone; 1379 if (error) { 1380 if (newvp) 1381 vput(newvp); 1382 } else { 1383 if (cnp->cn_flags & MAKEENTRY) 1384 cache_enter(dvp, newvp, cnp); 1385 *vpp = newvp; 1386 } 1387 PNBUF_PUT(cnp->cn_pnbuf); 1388 VTONFS(dvp)->n_flag |= NMODIFIED; 1389 if (!wccflag) 1390 VTONFS(dvp)->n_attrstamp = 0; 1391 vput(dvp); 1392 return (error); 1393 } 1394 1395 /* 1396 * nfs mknod vop 1397 * just call nfs_mknodrpc() to do the work. 1398 */ 1399 /* ARGSUSED */ 1400 int 1401 nfs_mknod(v) 1402 void *v; 1403 { 1404 struct vop_mknod_args /* { 1405 struct vnode *a_dvp; 1406 struct vnode **a_vpp; 1407 struct componentname *a_cnp; 1408 struct vattr *a_vap; 1409 } */ *ap = v; 1410 int error; 1411 1412 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1413 return (error); 1414 } 1415 1416 static u_long create_verf; 1417 /* 1418 * nfs file create call 1419 */ 1420 int 1421 nfs_create(v) 1422 void *v; 1423 { 1424 struct vop_create_args /* { 1425 struct vnode *a_dvp; 1426 struct vnode **a_vpp; 1427 struct componentname *a_cnp; 1428 struct vattr *a_vap; 1429 } */ *ap = v; 1430 struct vnode *dvp = ap->a_dvp; 1431 struct vattr *vap = ap->a_vap; 1432 struct componentname *cnp = ap->a_cnp; 1433 struct nfsv2_sattr *sp; 1434 u_int32_t *tl; 1435 caddr_t cp; 1436 int32_t t1, t2; 1437 struct nfsnode *np = (struct nfsnode *)0; 1438 struct vnode *newvp = (struct vnode *)0; 1439 caddr_t bpos, dpos, cp2; 1440 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1441 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1442 const int v3 = NFS_ISV3(dvp); 1443 1444 /* 1445 * Oops, not for me.. 1446 */ 1447 if (vap->va_type == VSOCK) 1448 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1449 1450 #ifdef VA_EXCLUSIVE 1451 if (vap->va_vaflags & VA_EXCLUSIVE) 1452 fmode |= O_EXCL; 1453 #endif 1454 again: 1455 error = 0; 1456 nfsstats.rpccnt[NFSPROC_CREATE]++; 1457 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1458 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1459 nfsm_fhtom(dvp, v3); 1460 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1461 if (v3) { 1462 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1463 if (fmode & O_EXCL) { 1464 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1465 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1466 #ifdef INET 1467 if (in_ifaddr.tqh_first) 1468 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1469 else 1470 *tl++ = create_verf; 1471 #else 1472 *tl++ = create_verf; 1473 #endif 1474 *tl = ++create_verf; 1475 } else { 1476 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1477 nfsm_v3attrbuild(vap, FALSE); 1478 } 1479 } else { 1480 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1481 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1482 sp->sa_uid = nfs_xdrneg1; 1483 sp->sa_gid = nfs_xdrneg1; 1484 sp->sa_size = 0; 1485 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1486 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1487 } 1488 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1489 if (!error) { 1490 nfsm_mtofh(dvp, newvp, v3, gotvp); 1491 if (!gotvp) { 1492 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1493 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1494 if (!error) 1495 newvp = NFSTOV(np); 1496 } 1497 } 1498 if (v3) 1499 nfsm_wcc_data(dvp, wccflag); 1500 nfsm_reqdone; 1501 if (error) { 1502 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1503 fmode &= ~O_EXCL; 1504 goto again; 1505 } 1506 if (newvp) 1507 vput(newvp); 1508 } else if (v3 && (fmode & O_EXCL)) 1509 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1510 if (!error) { 1511 if (cnp->cn_flags & MAKEENTRY) 1512 cache_enter(dvp, newvp, cnp); 1513 *ap->a_vpp = newvp; 1514 } 1515 PNBUF_PUT(cnp->cn_pnbuf); 1516 VTONFS(dvp)->n_flag |= NMODIFIED; 1517 if (!wccflag) 1518 VTONFS(dvp)->n_attrstamp = 0; 1519 vput(dvp); 1520 return (error); 1521 } 1522 1523 /* 1524 * nfs file remove call 1525 * To try and make nfs semantics closer to ufs semantics, a file that has 1526 * other processes using the vnode is renamed instead of removed and then 1527 * removed later on the last close. 1528 * - If v_usecount > 1 1529 * If a rename is not already in the works 1530 * call nfs_sillyrename() to set it up 1531 * else 1532 * do the remove rpc 1533 */ 1534 int 1535 nfs_remove(v) 1536 void *v; 1537 { 1538 struct vop_remove_args /* { 1539 struct vnodeop_desc *a_desc; 1540 struct vnode * a_dvp; 1541 struct vnode * a_vp; 1542 struct componentname * a_cnp; 1543 } */ *ap = v; 1544 struct vnode *vp = ap->a_vp; 1545 struct vnode *dvp = ap->a_dvp; 1546 struct componentname *cnp = ap->a_cnp; 1547 struct nfsnode *np = VTONFS(vp); 1548 int error = 0; 1549 struct vattr vattr; 1550 1551 #ifndef DIAGNOSTIC 1552 if ((cnp->cn_flags & HASBUF) == 0) 1553 panic("nfs_remove: no name"); 1554 if (vp->v_usecount < 1) 1555 panic("nfs_remove: bad v_usecount"); 1556 #endif 1557 if (vp->v_type == VDIR) 1558 error = EPERM; 1559 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1560 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1561 vattr.va_nlink > 1)) { 1562 /* 1563 * Purge the name cache so that the chance of a lookup for 1564 * the name succeeding while the remove is in progress is 1565 * minimized. Without node locking it can still happen, such 1566 * that an I/O op returns ESTALE, but since you get this if 1567 * another host removes the file.. 1568 */ 1569 cache_purge(vp); 1570 /* 1571 * throw away biocache buffers, mainly to avoid 1572 * unnecessary delayed writes later. 1573 */ 1574 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1575 /* Do the rpc */ 1576 if (error != EINTR) 1577 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1578 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1579 /* 1580 * Kludge City: If the first reply to the remove rpc is lost.. 1581 * the reply to the retransmitted request will be ENOENT 1582 * since the file was in fact removed 1583 * Therefore, we cheat and return success. 1584 */ 1585 if (error == ENOENT) 1586 error = 0; 1587 } else if (!np->n_sillyrename) 1588 error = nfs_sillyrename(dvp, vp, cnp); 1589 PNBUF_PUT(cnp->cn_pnbuf); 1590 np->n_attrstamp = 0; 1591 vput(dvp); 1592 vput(vp); 1593 return (error); 1594 } 1595 1596 /* 1597 * nfs file remove rpc called from nfs_inactive 1598 */ 1599 int 1600 nfs_removeit(sp) 1601 struct sillyrename *sp; 1602 { 1603 1604 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1605 (struct proc *)0)); 1606 } 1607 1608 /* 1609 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1610 */ 1611 int 1612 nfs_removerpc(dvp, name, namelen, cred, proc) 1613 struct vnode *dvp; 1614 const char *name; 1615 int namelen; 1616 struct ucred *cred; 1617 struct proc *proc; 1618 { 1619 u_int32_t *tl; 1620 caddr_t cp; 1621 int32_t t1, t2; 1622 caddr_t bpos, dpos, cp2; 1623 int error = 0, wccflag = NFSV3_WCCRATTR; 1624 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1625 const int v3 = NFS_ISV3(dvp); 1626 1627 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1628 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1629 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1630 nfsm_fhtom(dvp, v3); 1631 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1632 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1633 if (v3) 1634 nfsm_wcc_data(dvp, wccflag); 1635 nfsm_reqdone; 1636 VTONFS(dvp)->n_flag |= NMODIFIED; 1637 if (!wccflag) 1638 VTONFS(dvp)->n_attrstamp = 0; 1639 return (error); 1640 } 1641 1642 /* 1643 * nfs file rename call 1644 */ 1645 int 1646 nfs_rename(v) 1647 void *v; 1648 { 1649 struct vop_rename_args /* { 1650 struct vnode *a_fdvp; 1651 struct vnode *a_fvp; 1652 struct componentname *a_fcnp; 1653 struct vnode *a_tdvp; 1654 struct vnode *a_tvp; 1655 struct componentname *a_tcnp; 1656 } */ *ap = v; 1657 struct vnode *fvp = ap->a_fvp; 1658 struct vnode *tvp = ap->a_tvp; 1659 struct vnode *fdvp = ap->a_fdvp; 1660 struct vnode *tdvp = ap->a_tdvp; 1661 struct componentname *tcnp = ap->a_tcnp; 1662 struct componentname *fcnp = ap->a_fcnp; 1663 int error; 1664 1665 #ifndef DIAGNOSTIC 1666 if ((tcnp->cn_flags & HASBUF) == 0 || 1667 (fcnp->cn_flags & HASBUF) == 0) 1668 panic("nfs_rename: no name"); 1669 #endif 1670 /* Check for cross-device rename */ 1671 if ((fvp->v_mount != tdvp->v_mount) || 1672 (tvp && (fvp->v_mount != tvp->v_mount))) { 1673 error = EXDEV; 1674 goto out; 1675 } 1676 1677 /* 1678 * If the tvp exists and is in use, sillyrename it before doing the 1679 * rename of the new file over it. 1680 */ 1681 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1682 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1683 vput(tvp); 1684 tvp = NULL; 1685 } 1686 1687 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1688 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1689 tcnp->cn_proc); 1690 1691 if (fvp->v_type == VDIR) { 1692 if (tvp != NULL && tvp->v_type == VDIR) 1693 cache_purge(tdvp); 1694 cache_purge(fdvp); 1695 } 1696 out: 1697 if (tdvp == tvp) 1698 vrele(tdvp); 1699 else 1700 vput(tdvp); 1701 if (tvp) 1702 vput(tvp); 1703 vrele(fdvp); 1704 vrele(fvp); 1705 /* 1706 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1707 */ 1708 if (error == ENOENT) 1709 error = 0; 1710 return (error); 1711 } 1712 1713 /* 1714 * nfs file rename rpc called from nfs_remove() above 1715 */ 1716 int 1717 nfs_renameit(sdvp, scnp, sp) 1718 struct vnode *sdvp; 1719 struct componentname *scnp; 1720 struct sillyrename *sp; 1721 { 1722 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1723 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1724 } 1725 1726 /* 1727 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1728 */ 1729 int 1730 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1731 struct vnode *fdvp; 1732 const char *fnameptr; 1733 int fnamelen; 1734 struct vnode *tdvp; 1735 const char *tnameptr; 1736 int tnamelen; 1737 struct ucred *cred; 1738 struct proc *proc; 1739 { 1740 u_int32_t *tl; 1741 caddr_t cp; 1742 int32_t t1, t2; 1743 caddr_t bpos, dpos, cp2; 1744 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1745 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1746 const int v3 = NFS_ISV3(fdvp); 1747 1748 nfsstats.rpccnt[NFSPROC_RENAME]++; 1749 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1750 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1751 nfsm_rndup(tnamelen)); 1752 nfsm_fhtom(fdvp, v3); 1753 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1754 nfsm_fhtom(tdvp, v3); 1755 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1756 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1757 if (v3) { 1758 nfsm_wcc_data(fdvp, fwccflag); 1759 nfsm_wcc_data(tdvp, twccflag); 1760 } 1761 nfsm_reqdone; 1762 VTONFS(fdvp)->n_flag |= NMODIFIED; 1763 VTONFS(tdvp)->n_flag |= NMODIFIED; 1764 if (!fwccflag) 1765 VTONFS(fdvp)->n_attrstamp = 0; 1766 if (!twccflag) 1767 VTONFS(tdvp)->n_attrstamp = 0; 1768 return (error); 1769 } 1770 1771 /* 1772 * nfs hard link create call 1773 */ 1774 int 1775 nfs_link(v) 1776 void *v; 1777 { 1778 struct vop_link_args /* { 1779 struct vnode *a_dvp; 1780 struct vnode *a_vp; 1781 struct componentname *a_cnp; 1782 } */ *ap = v; 1783 struct vnode *vp = ap->a_vp; 1784 struct vnode *dvp = ap->a_dvp; 1785 struct componentname *cnp = ap->a_cnp; 1786 u_int32_t *tl; 1787 caddr_t cp; 1788 int32_t t1, t2; 1789 caddr_t bpos, dpos, cp2; 1790 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1791 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1792 /* XXX Should be const and initialised? */ 1793 int v3; 1794 1795 if (dvp->v_mount != vp->v_mount) { 1796 VOP_ABORTOP(vp, cnp); 1797 vput(dvp); 1798 return (EXDEV); 1799 } 1800 if (dvp != vp) { 1801 error = vn_lock(vp, LK_EXCLUSIVE); 1802 if (error != 0) { 1803 VOP_ABORTOP(dvp, cnp); 1804 vput(dvp); 1805 return error; 1806 } 1807 } 1808 1809 /* 1810 * Push all writes to the server, so that the attribute cache 1811 * doesn't get "out of sync" with the server. 1812 * XXX There should be a better way! 1813 */ 1814 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1815 1816 v3 = NFS_ISV3(vp); 1817 nfsstats.rpccnt[NFSPROC_LINK]++; 1818 nfsm_reqhead(vp, NFSPROC_LINK, 1819 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1820 nfsm_fhtom(vp, v3); 1821 nfsm_fhtom(dvp, v3); 1822 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1823 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1824 if (v3) { 1825 nfsm_postop_attr(vp, attrflag); 1826 nfsm_wcc_data(dvp, wccflag); 1827 } 1828 nfsm_reqdone; 1829 PNBUF_PUT(cnp->cn_pnbuf); 1830 VTONFS(dvp)->n_flag |= NMODIFIED; 1831 if (!attrflag) 1832 VTONFS(vp)->n_attrstamp = 0; 1833 if (!wccflag) 1834 VTONFS(dvp)->n_attrstamp = 0; 1835 if (dvp != vp) 1836 VOP_UNLOCK(vp, 0); 1837 vput(dvp); 1838 /* 1839 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1840 */ 1841 if (error == EEXIST) 1842 error = 0; 1843 return (error); 1844 } 1845 1846 /* 1847 * nfs symbolic link create call 1848 */ 1849 int 1850 nfs_symlink(v) 1851 void *v; 1852 { 1853 struct vop_symlink_args /* { 1854 struct vnode *a_dvp; 1855 struct vnode **a_vpp; 1856 struct componentname *a_cnp; 1857 struct vattr *a_vap; 1858 char *a_target; 1859 } */ *ap = v; 1860 struct vnode *dvp = ap->a_dvp; 1861 struct vattr *vap = ap->a_vap; 1862 struct componentname *cnp = ap->a_cnp; 1863 struct nfsv2_sattr *sp; 1864 u_int32_t *tl; 1865 caddr_t cp; 1866 int32_t t1, t2; 1867 caddr_t bpos, dpos, cp2; 1868 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1869 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1870 struct vnode *newvp = (struct vnode *)0; 1871 const int v3 = NFS_ISV3(dvp); 1872 1873 *ap->a_vpp = NULL; 1874 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1875 slen = strlen(ap->a_target); 1876 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1877 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1878 nfsm_fhtom(dvp, v3); 1879 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1880 if (v3) 1881 nfsm_v3attrbuild(vap, FALSE); 1882 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1883 if (!v3) { 1884 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1885 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1886 sp->sa_uid = nfs_xdrneg1; 1887 sp->sa_gid = nfs_xdrneg1; 1888 sp->sa_size = nfs_xdrneg1; 1889 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1890 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1891 } 1892 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1893 if (v3) { 1894 if (!error) 1895 nfsm_mtofh(dvp, newvp, v3, gotvp); 1896 nfsm_wcc_data(dvp, wccflag); 1897 } 1898 nfsm_reqdone; 1899 /* 1900 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1901 */ 1902 if (error == EEXIST) 1903 error = 0; 1904 if (error == 0 && newvp == NULL) { 1905 struct nfsnode *np = NULL; 1906 1907 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1908 cnp->cn_cred, cnp->cn_proc, &np); 1909 if (error == 0) 1910 newvp = NFSTOV(np); 1911 } 1912 if (error) { 1913 if (newvp != NULL) 1914 vput(newvp); 1915 } else { 1916 *ap->a_vpp = newvp; 1917 } 1918 PNBUF_PUT(cnp->cn_pnbuf); 1919 VTONFS(dvp)->n_flag |= NMODIFIED; 1920 if (!wccflag) 1921 VTONFS(dvp)->n_attrstamp = 0; 1922 vput(dvp); 1923 return (error); 1924 } 1925 1926 /* 1927 * nfs make dir call 1928 */ 1929 int 1930 nfs_mkdir(v) 1931 void *v; 1932 { 1933 struct vop_mkdir_args /* { 1934 struct vnode *a_dvp; 1935 struct vnode **a_vpp; 1936 struct componentname *a_cnp; 1937 struct vattr *a_vap; 1938 } */ *ap = v; 1939 struct vnode *dvp = ap->a_dvp; 1940 struct vattr *vap = ap->a_vap; 1941 struct componentname *cnp = ap->a_cnp; 1942 struct nfsv2_sattr *sp; 1943 u_int32_t *tl; 1944 caddr_t cp; 1945 int32_t t1, t2; 1946 int len; 1947 struct nfsnode *np = (struct nfsnode *)0; 1948 struct vnode *newvp = (struct vnode *)0; 1949 caddr_t bpos, dpos, cp2; 1950 int error = 0, wccflag = NFSV3_WCCRATTR; 1951 int gotvp = 0; 1952 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1953 const int v3 = NFS_ISV3(dvp); 1954 1955 len = cnp->cn_namelen; 1956 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1957 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1958 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1959 nfsm_fhtom(dvp, v3); 1960 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1961 if (v3) { 1962 nfsm_v3attrbuild(vap, FALSE); 1963 } else { 1964 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1965 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1966 sp->sa_uid = nfs_xdrneg1; 1967 sp->sa_gid = nfs_xdrneg1; 1968 sp->sa_size = nfs_xdrneg1; 1969 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1970 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1971 } 1972 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1973 if (!error) 1974 nfsm_mtofh(dvp, newvp, v3, gotvp); 1975 if (v3) 1976 nfsm_wcc_data(dvp, wccflag); 1977 nfsm_reqdone; 1978 VTONFS(dvp)->n_flag |= NMODIFIED; 1979 if (!wccflag) 1980 VTONFS(dvp)->n_attrstamp = 0; 1981 /* 1982 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1983 * if we can succeed in looking up the directory. 1984 */ 1985 if (error == EEXIST || (!error && !gotvp)) { 1986 if (newvp) { 1987 vput(newvp); 1988 newvp = (struct vnode *)0; 1989 } 1990 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1991 cnp->cn_proc, &np); 1992 if (!error) { 1993 newvp = NFSTOV(np); 1994 if (newvp->v_type != VDIR) 1995 error = EEXIST; 1996 } 1997 } 1998 if (error) { 1999 if (newvp) 2000 vput(newvp); 2001 } else { 2002 if (cnp->cn_flags & MAKEENTRY) 2003 cache_enter(dvp, newvp, cnp); 2004 *ap->a_vpp = newvp; 2005 } 2006 PNBUF_PUT(cnp->cn_pnbuf); 2007 vput(dvp); 2008 return (error); 2009 } 2010 2011 /* 2012 * nfs remove directory call 2013 */ 2014 int 2015 nfs_rmdir(v) 2016 void *v; 2017 { 2018 struct vop_rmdir_args /* { 2019 struct vnode *a_dvp; 2020 struct vnode *a_vp; 2021 struct componentname *a_cnp; 2022 } */ *ap = v; 2023 struct vnode *vp = ap->a_vp; 2024 struct vnode *dvp = ap->a_dvp; 2025 struct componentname *cnp = ap->a_cnp; 2026 u_int32_t *tl; 2027 caddr_t cp; 2028 int32_t t1, t2; 2029 caddr_t bpos, dpos, cp2; 2030 int error = 0, wccflag = NFSV3_WCCRATTR; 2031 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2032 const int v3 = NFS_ISV3(dvp); 2033 2034 if (dvp == vp) { 2035 vrele(dvp); 2036 vput(dvp); 2037 PNBUF_PUT(cnp->cn_pnbuf); 2038 return (EINVAL); 2039 } 2040 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2041 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2042 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2043 nfsm_fhtom(dvp, v3); 2044 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2045 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2046 if (v3) 2047 nfsm_wcc_data(dvp, wccflag); 2048 nfsm_reqdone; 2049 PNBUF_PUT(cnp->cn_pnbuf); 2050 VTONFS(dvp)->n_flag |= NMODIFIED; 2051 if (!wccflag) 2052 VTONFS(dvp)->n_attrstamp = 0; 2053 cache_purge(dvp); 2054 cache_purge(vp); 2055 vput(vp); 2056 vput(dvp); 2057 /* 2058 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2059 */ 2060 if (error == ENOENT) 2061 error = 0; 2062 return (error); 2063 } 2064 2065 /* 2066 * nfs readdir call 2067 */ 2068 int 2069 nfs_readdir(v) 2070 void *v; 2071 { 2072 struct vop_readdir_args /* { 2073 struct vnode *a_vp; 2074 struct uio *a_uio; 2075 struct ucred *a_cred; 2076 int *a_eofflag; 2077 off_t **a_cookies; 2078 int *a_ncookies; 2079 } */ *ap = v; 2080 struct vnode *vp = ap->a_vp; 2081 struct uio *uio = ap->a_uio; 2082 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2083 char *base = uio->uio_iov->iov_base; 2084 int tresid, error; 2085 size_t count, lost; 2086 struct dirent *dp; 2087 off_t *cookies = NULL; 2088 int ncookies = 0, nc; 2089 2090 if (vp->v_type != VDIR) 2091 return (EPERM); 2092 2093 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2094 count = uio->uio_resid - lost; 2095 if (count <= 0) 2096 return (EINVAL); 2097 2098 /* 2099 * Call nfs_bioread() to do the real work. 2100 */ 2101 tresid = uio->uio_resid = count; 2102 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2103 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2104 2105 if (!error && ap->a_cookies) { 2106 ncookies = count / 16; 2107 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2108 *ap->a_cookies = cookies; 2109 } 2110 2111 if (!error && uio->uio_resid == tresid) { 2112 uio->uio_resid += lost; 2113 nfsstats.direofcache_misses++; 2114 if (ap->a_cookies) 2115 *ap->a_ncookies = 0; 2116 *ap->a_eofflag = 1; 2117 return (0); 2118 } 2119 2120 if (!error && ap->a_cookies) { 2121 /* 2122 * Only the NFS server and emulations use cookies, and they 2123 * load the directory block into system space, so we can 2124 * just look at it directly. 2125 */ 2126 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2127 panic("nfs_readdir: lost in space"); 2128 for (nc = 0; ncookies-- && 2129 base < (char *)uio->uio_iov->iov_base; nc++){ 2130 dp = (struct dirent *) base; 2131 if (dp->d_reclen == 0) 2132 break; 2133 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2134 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2135 else 2136 *(cookies++) = NFS_GETCOOKIE(dp); 2137 base += dp->d_reclen; 2138 } 2139 uio->uio_resid += 2140 ((caddr_t)uio->uio_iov->iov_base - base); 2141 uio->uio_iov->iov_len += 2142 ((caddr_t)uio->uio_iov->iov_base - base); 2143 uio->uio_iov->iov_base = base; 2144 *ap->a_ncookies = nc; 2145 } 2146 2147 uio->uio_resid += lost; 2148 *ap->a_eofflag = 0; 2149 return (error); 2150 } 2151 2152 /* 2153 * Readdir rpc call. 2154 * Called from below the buffer cache by nfs_doio(). 2155 */ 2156 int 2157 nfs_readdirrpc(vp, uiop, cred) 2158 struct vnode *vp; 2159 struct uio *uiop; 2160 struct ucred *cred; 2161 { 2162 int len, left; 2163 struct dirent *dp = NULL; 2164 u_int32_t *tl; 2165 caddr_t cp; 2166 int32_t t1, t2; 2167 caddr_t bpos, dpos, cp2; 2168 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2169 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2170 struct nfsnode *dnp = VTONFS(vp); 2171 u_quad_t fileno; 2172 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2173 int attrflag, nrpcs = 0, reclen; 2174 const int v3 = NFS_ISV3(vp); 2175 nfsquad_t cookie; 2176 2177 #ifdef DIAGNOSTIC 2178 /* 2179 * Should be called from buffer cache, so only amount of 2180 * NFS_DIRBLKSIZ will be requested. 2181 */ 2182 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2183 panic("nfs readdirrpc bad uio"); 2184 #endif 2185 2186 /* 2187 * Loop around doing readdir rpc's of size nm_readdirsize 2188 * truncated to a multiple of NFS_DIRFRAGSIZ. 2189 * The stopping criteria is EOF or buffer full. 2190 */ 2191 while (more_dirs && bigenough) { 2192 /* 2193 * Heuristic: don't bother to do another RPC to further 2194 * fill up this block if there is not much room left. (< 50% 2195 * of the readdir RPC size). This wastes some buffer space 2196 * but can save up to 50% in RPC calls. 2197 */ 2198 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2199 bigenough = 0; 2200 break; 2201 } 2202 nfsstats.rpccnt[NFSPROC_READDIR]++; 2203 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2204 NFSX_READDIR(v3)); 2205 nfsm_fhtom(vp, v3); 2206 if (v3) { 2207 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2208 cookie.qval = uiop->uio_offset; 2209 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2210 txdr_swapcookie3(uiop->uio_offset, tl); 2211 } else { 2212 txdr_cookie3(uiop->uio_offset, tl); 2213 } 2214 tl += 2; 2215 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2216 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2217 } else { 2218 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2219 *tl++ = txdr_unsigned(uiop->uio_offset); 2220 } 2221 *tl = txdr_unsigned(nmp->nm_readdirsize); 2222 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2223 nrpcs++; 2224 if (v3) { 2225 nfsm_postop_attr(vp, attrflag); 2226 if (!error) { 2227 nfsm_dissect(tl, u_int32_t *, 2228 2 * NFSX_UNSIGNED); 2229 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2230 dnp->n_cookieverf.nfsuquad[1] = *tl; 2231 } else { 2232 m_freem(mrep); 2233 goto nfsmout; 2234 } 2235 } 2236 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2237 more_dirs = fxdr_unsigned(int, *tl); 2238 2239 /* loop thru the dir entries, doctoring them to 4bsd form */ 2240 while (more_dirs && bigenough) { 2241 if (v3) { 2242 nfsm_dissect(tl, u_int32_t *, 2243 3 * NFSX_UNSIGNED); 2244 fileno = fxdr_hyper(tl); 2245 len = fxdr_unsigned(int, *(tl + 2)); 2246 } else { 2247 nfsm_dissect(tl, u_int32_t *, 2248 2 * NFSX_UNSIGNED); 2249 fileno = fxdr_unsigned(u_quad_t, *tl++); 2250 len = fxdr_unsigned(int, *tl); 2251 } 2252 if (len <= 0 || len > NFS_MAXNAMLEN) { 2253 error = EBADRPC; 2254 m_freem(mrep); 2255 goto nfsmout; 2256 } 2257 tlen = nfsm_rndup(len); 2258 if (tlen == len) 2259 tlen += 4; /* To ensure null termination */ 2260 tlen += sizeof (off_t) + sizeof (int); 2261 reclen = ALIGN(tlen + DIRHDSIZ); 2262 tlen = reclen - DIRHDSIZ; 2263 left = NFS_DIRFRAGSIZ - blksiz; 2264 if (reclen > left) { 2265 dp->d_reclen += left; 2266 uiop->uio_iov->iov_base = 2267 (caddr_t)uiop->uio_iov->iov_base + left; 2268 uiop->uio_iov->iov_len -= left; 2269 uiop->uio_resid -= left; 2270 blksiz = 0; 2271 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2272 } 2273 if (reclen > uiop->uio_resid) 2274 bigenough = 0; 2275 if (bigenough) { 2276 dp = (struct dirent *)uiop->uio_iov->iov_base; 2277 dp->d_fileno = (int)fileno; 2278 dp->d_namlen = len; 2279 dp->d_reclen = reclen; 2280 dp->d_type = DT_UNKNOWN; 2281 blksiz += dp->d_reclen; 2282 if (blksiz == NFS_DIRFRAGSIZ) 2283 blksiz = 0; 2284 uiop->uio_resid -= DIRHDSIZ; 2285 uiop->uio_iov->iov_base = 2286 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2287 uiop->uio_iov->iov_len -= DIRHDSIZ; 2288 nfsm_mtouio(uiop, len); 2289 cp = uiop->uio_iov->iov_base; 2290 tlen -= len; 2291 *cp = '\0'; /* null terminate */ 2292 uiop->uio_iov->iov_base = 2293 (caddr_t)uiop->uio_iov->iov_base + tlen; 2294 uiop->uio_iov->iov_len -= tlen; 2295 uiop->uio_resid -= tlen; 2296 } else 2297 nfsm_adv(nfsm_rndup(len)); 2298 if (v3) { 2299 nfsm_dissect(tl, u_int32_t *, 2300 3 * NFSX_UNSIGNED); 2301 } else { 2302 nfsm_dissect(tl, u_int32_t *, 2303 2 * NFSX_UNSIGNED); 2304 } 2305 if (bigenough) { 2306 if (v3) { 2307 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2308 uiop->uio_offset = 2309 fxdr_swapcookie3(tl); 2310 else 2311 uiop->uio_offset = 2312 fxdr_cookie3(tl); 2313 } 2314 else { 2315 uiop->uio_offset = 2316 fxdr_unsigned(off_t, *tl); 2317 } 2318 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2319 } 2320 if (v3) 2321 tl += 2; 2322 else 2323 tl++; 2324 more_dirs = fxdr_unsigned(int, *tl); 2325 } 2326 /* 2327 * If at end of rpc data, get the eof boolean 2328 */ 2329 if (!more_dirs) { 2330 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2331 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2332 } 2333 m_freem(mrep); 2334 } 2335 /* 2336 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2337 * by increasing d_reclen for the last record. 2338 */ 2339 if (blksiz > 0) { 2340 left = NFS_DIRFRAGSIZ - blksiz; 2341 dp->d_reclen += left; 2342 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2343 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2344 left; 2345 uiop->uio_iov->iov_len -= left; 2346 uiop->uio_resid -= left; 2347 } 2348 2349 /* 2350 * We are now either at the end of the directory or have filled the 2351 * block. 2352 */ 2353 if (bigenough) 2354 dnp->n_direofoffset = uiop->uio_offset; 2355 nfsmout: 2356 return (error); 2357 } 2358 2359 /* 2360 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2361 */ 2362 int 2363 nfs_readdirplusrpc(vp, uiop, cred) 2364 struct vnode *vp; 2365 struct uio *uiop; 2366 struct ucred *cred; 2367 { 2368 int len, left; 2369 struct dirent *dp = NULL; 2370 u_int32_t *tl; 2371 caddr_t cp; 2372 int32_t t1, t2; 2373 struct vnode *newvp; 2374 caddr_t bpos, dpos, cp2; 2375 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2376 struct nameidata nami, *ndp = &nami; 2377 struct componentname *cnp = &ndp->ni_cnd; 2378 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2379 struct nfsnode *dnp = VTONFS(vp), *np; 2380 const unsigned char *hcp; 2381 nfsfh_t *fhp; 2382 u_quad_t fileno; 2383 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2384 int attrflag, fhsize, nrpcs = 0, reclen; 2385 struct nfs_fattr fattr, *fp; 2386 2387 #ifdef DIAGNOSTIC 2388 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2389 panic("nfs readdirplusrpc bad uio"); 2390 #endif 2391 ndp->ni_dvp = vp; 2392 newvp = NULLVP; 2393 2394 /* 2395 * Loop around doing readdir rpc's of size nm_readdirsize 2396 * truncated to a multiple of NFS_DIRFRAGSIZ. 2397 * The stopping criteria is EOF or buffer full. 2398 */ 2399 while (more_dirs && bigenough) { 2400 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2401 bigenough = 0; 2402 break; 2403 } 2404 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2405 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2406 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2407 nfsm_fhtom(vp, 1); 2408 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2409 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2410 txdr_swapcookie3(uiop->uio_offset, tl); 2411 } else { 2412 txdr_cookie3(uiop->uio_offset, tl); 2413 } 2414 tl += 2; 2415 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2416 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2417 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2418 *tl = txdr_unsigned(nmp->nm_rsize); 2419 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2420 nfsm_postop_attr(vp, attrflag); 2421 if (error) { 2422 m_freem(mrep); 2423 goto nfsmout; 2424 } 2425 nrpcs++; 2426 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2427 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2428 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2429 more_dirs = fxdr_unsigned(int, *tl); 2430 2431 /* loop thru the dir entries, doctoring them to 4bsd form */ 2432 while (more_dirs && bigenough) { 2433 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2434 fileno = fxdr_hyper(tl); 2435 len = fxdr_unsigned(int, *(tl + 2)); 2436 if (len <= 0 || len > NFS_MAXNAMLEN) { 2437 error = EBADRPC; 2438 m_freem(mrep); 2439 goto nfsmout; 2440 } 2441 tlen = nfsm_rndup(len); 2442 if (tlen == len) 2443 tlen += 4; /* To ensure null termination*/ 2444 tlen += sizeof (off_t) + sizeof (int); 2445 reclen = ALIGN(tlen + DIRHDSIZ); 2446 tlen = reclen - DIRHDSIZ; 2447 left = NFS_DIRFRAGSIZ - blksiz; 2448 if (reclen > left) { 2449 /* 2450 * DIRFRAGSIZ is aligned, no need to align 2451 * again here. 2452 */ 2453 dp->d_reclen += left; 2454 uiop->uio_iov->iov_base = 2455 (caddr_t)uiop->uio_iov->iov_base + left; 2456 uiop->uio_iov->iov_len -= left; 2457 uiop->uio_resid -= left; 2458 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2459 blksiz = 0; 2460 } 2461 if (reclen > uiop->uio_resid) 2462 bigenough = 0; 2463 if (bigenough) { 2464 dp = (struct dirent *)uiop->uio_iov->iov_base; 2465 dp->d_fileno = (int)fileno; 2466 dp->d_namlen = len; 2467 dp->d_reclen = reclen; 2468 dp->d_type = DT_UNKNOWN; 2469 blksiz += dp->d_reclen; 2470 if (blksiz == NFS_DIRFRAGSIZ) 2471 blksiz = 0; 2472 uiop->uio_resid -= DIRHDSIZ; 2473 uiop->uio_iov->iov_base = 2474 (caddr_t)uiop->uio_iov->iov_base + 2475 DIRHDSIZ; 2476 uiop->uio_iov->iov_len -= DIRHDSIZ; 2477 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2478 cnp->cn_namelen = len; 2479 nfsm_mtouio(uiop, len); 2480 cp = uiop->uio_iov->iov_base; 2481 tlen -= len; 2482 *cp = '\0'; 2483 uiop->uio_iov->iov_base = 2484 (caddr_t)uiop->uio_iov->iov_base + tlen; 2485 uiop->uio_iov->iov_len -= tlen; 2486 uiop->uio_resid -= tlen; 2487 } else 2488 nfsm_adv(nfsm_rndup(len)); 2489 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2490 if (bigenough) { 2491 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2492 uiop->uio_offset = 2493 fxdr_swapcookie3(tl); 2494 else 2495 uiop->uio_offset = 2496 fxdr_cookie3(tl); 2497 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2498 } 2499 tl += 2; 2500 2501 /* 2502 * Since the attributes are before the file handle 2503 * (sigh), we must skip over the attributes and then 2504 * come back and get them. 2505 */ 2506 attrflag = fxdr_unsigned(int, *tl); 2507 if (attrflag) { 2508 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2509 memcpy(&fattr, fp, NFSX_V3FATTR); 2510 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2511 doit = fxdr_unsigned(int, *tl); 2512 if (doit) { 2513 nfsm_getfh(fhp, fhsize, 1); 2514 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2515 VREF(vp); 2516 newvp = vp; 2517 np = dnp; 2518 } else { 2519 error = nfs_nget(vp->v_mount, fhp, 2520 fhsize, &np); 2521 if (!error) 2522 newvp = NFSTOV(np); 2523 } 2524 if (!error) { 2525 nfs_loadattrcache(&newvp, &fattr, 0); 2526 dp->d_type = 2527 IFTODT(VTTOIF(np->n_vattr->va_type)); 2528 ndp->ni_vp = newvp; 2529 cnp->cn_hash = 0; 2530 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2531 i++, hcp++) 2532 cnp->cn_hash += *hcp * i; 2533 if (cnp->cn_namelen <= NCHNAMLEN) 2534 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2535 cnp); 2536 } 2537 } 2538 } else { 2539 /* Just skip over the file handle */ 2540 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2541 i = fxdr_unsigned(int, *tl); 2542 nfsm_adv(nfsm_rndup(i)); 2543 } 2544 if (newvp != NULLVP) { 2545 vrele(newvp); 2546 if (newvp != vp) 2547 VOP_UNLOCK(vp, 0); 2548 newvp = NULLVP; 2549 } 2550 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2551 more_dirs = fxdr_unsigned(int, *tl); 2552 } 2553 /* 2554 * If at end of rpc data, get the eof boolean 2555 */ 2556 if (!more_dirs) { 2557 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2558 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2559 } 2560 m_freem(mrep); 2561 } 2562 /* 2563 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2564 * by increasing d_reclen for the last record. 2565 */ 2566 if (blksiz > 0) { 2567 left = NFS_DIRFRAGSIZ - blksiz; 2568 dp->d_reclen += left; 2569 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2570 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2571 left; 2572 uiop->uio_iov->iov_len -= left; 2573 uiop->uio_resid -= left; 2574 } 2575 2576 /* 2577 * We are now either at the end of the directory or have filled the 2578 * block. 2579 */ 2580 if (bigenough) 2581 dnp->n_direofoffset = uiop->uio_offset; 2582 nfsmout: 2583 if (newvp != NULLVP) { 2584 vrele(newvp); 2585 if (newvp != vp) 2586 VOP_UNLOCK(vp, 0); 2587 } 2588 return (error); 2589 } 2590 static char hextoasc[] = "0123456789abcdef"; 2591 2592 /* 2593 * Silly rename. To make the NFS filesystem that is stateless look a little 2594 * more like the "ufs" a remove of an active vnode is translated to a rename 2595 * to a funny looking filename that is removed by nfs_inactive on the 2596 * nfsnode. There is the potential for another process on a different client 2597 * to create the same funny name between the nfs_lookitup() fails and the 2598 * nfs_rename() completes, but... 2599 */ 2600 int 2601 nfs_sillyrename(dvp, vp, cnp) 2602 struct vnode *dvp, *vp; 2603 struct componentname *cnp; 2604 { 2605 struct sillyrename *sp; 2606 struct nfsnode *np; 2607 int error; 2608 short pid; 2609 2610 cache_purge(dvp); 2611 np = VTONFS(vp); 2612 #ifndef DIAGNOSTIC 2613 if (vp->v_type == VDIR) 2614 panic("nfs: sillyrename dir"); 2615 #endif 2616 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2617 M_NFSREQ, M_WAITOK); 2618 sp->s_cred = crdup(cnp->cn_cred); 2619 sp->s_dvp = dvp; 2620 VREF(dvp); 2621 2622 /* Fudge together a funny name */ 2623 pid = cnp->cn_proc->p_pid; 2624 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2625 sp->s_namlen = 12; 2626 sp->s_name[8] = hextoasc[pid & 0xf]; 2627 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2628 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2629 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2630 2631 /* Try lookitups until we get one that isn't there */ 2632 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2633 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2634 sp->s_name[4]++; 2635 if (sp->s_name[4] > 'z') { 2636 error = EINVAL; 2637 goto bad; 2638 } 2639 } 2640 error = nfs_renameit(dvp, cnp, sp); 2641 if (error) 2642 goto bad; 2643 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2644 cnp->cn_proc, &np); 2645 np->n_sillyrename = sp; 2646 return (0); 2647 bad: 2648 vrele(sp->s_dvp); 2649 crfree(sp->s_cred); 2650 free((caddr_t)sp, M_NFSREQ); 2651 return (error); 2652 } 2653 2654 /* 2655 * Look up a file name and optionally either update the file handle or 2656 * allocate an nfsnode, depending on the value of npp. 2657 * npp == NULL --> just do the lookup 2658 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2659 * handled too 2660 * *npp != NULL --> update the file handle in the vnode 2661 */ 2662 int 2663 nfs_lookitup(dvp, name, len, cred, procp, npp) 2664 struct vnode *dvp; 2665 const char *name; 2666 int len; 2667 struct ucred *cred; 2668 struct proc *procp; 2669 struct nfsnode **npp; 2670 { 2671 u_int32_t *tl; 2672 caddr_t cp; 2673 int32_t t1, t2; 2674 struct vnode *newvp = (struct vnode *)0; 2675 struct nfsnode *np, *dnp = VTONFS(dvp); 2676 caddr_t bpos, dpos, cp2; 2677 int error = 0, fhlen, attrflag; 2678 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2679 nfsfh_t *nfhp; 2680 const int v3 = NFS_ISV3(dvp); 2681 2682 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2683 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2684 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2685 nfsm_fhtom(dvp, v3); 2686 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2687 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2688 if (npp && !error) { 2689 nfsm_getfh(nfhp, fhlen, v3); 2690 if (*npp) { 2691 np = *npp; 2692 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2693 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2694 np->n_fhp = &np->n_fh; 2695 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2696 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2697 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2698 np->n_fhsize = fhlen; 2699 newvp = NFSTOV(np); 2700 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2701 VREF(dvp); 2702 newvp = dvp; 2703 } else { 2704 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2705 if (error) { 2706 m_freem(mrep); 2707 return (error); 2708 } 2709 newvp = NFSTOV(np); 2710 } 2711 if (v3) { 2712 nfsm_postop_attr(newvp, attrflag); 2713 if (!attrflag && *npp == NULL) { 2714 m_freem(mrep); 2715 vput(newvp); 2716 return (ENOENT); 2717 } 2718 } else 2719 nfsm_loadattr(newvp, (struct vattr *)0); 2720 } 2721 nfsm_reqdone; 2722 if (npp && *npp == NULL) { 2723 if (error) { 2724 if (newvp) 2725 vput(newvp); 2726 } else 2727 *npp = np; 2728 } 2729 return (error); 2730 } 2731 2732 /* 2733 * Nfs Version 3 commit rpc 2734 */ 2735 int 2736 nfs_commit(vp, offset, cnt, procp) 2737 struct vnode *vp; 2738 off_t offset; 2739 uint32_t cnt; 2740 struct proc *procp; 2741 { 2742 caddr_t cp; 2743 u_int32_t *tl; 2744 int32_t t1, t2; 2745 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2746 caddr_t bpos, dpos, cp2; 2747 int error = 0, wccflag = NFSV3_WCCRATTR; 2748 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2749 2750 #ifdef fvdl_debug 2751 printf("commit %lu - %lu\n", (unsigned long)offset, 2752 (unsigned long)(offset + cnt)); 2753 #endif 2754 2755 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2756 return (0); 2757 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2758 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2759 nfsm_fhtom(vp, 1); 2760 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2761 txdr_hyper(offset, tl); 2762 tl += 2; 2763 *tl = txdr_unsigned(cnt); 2764 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2765 nfsm_wcc_data(vp, wccflag); 2766 if (!error) { 2767 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2768 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2769 NFSX_V3WRITEVERF)) { 2770 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2771 NFSX_V3WRITEVERF); 2772 error = NFSERR_STALEWRITEVERF; 2773 } 2774 } 2775 nfsm_reqdone; 2776 return (error); 2777 } 2778 2779 /* 2780 * Kludge City.. 2781 * - make nfs_bmap() essentially a no-op that does no translation 2782 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2783 * (Maybe I could use the process's page mapping, but I was concerned that 2784 * Kernel Write might not be enabled and also figured copyout() would do 2785 * a lot more work than memcpy() and also it currently happens in the 2786 * context of the swapper process (2). 2787 */ 2788 int 2789 nfs_bmap(v) 2790 void *v; 2791 { 2792 struct vop_bmap_args /* { 2793 struct vnode *a_vp; 2794 daddr_t a_bn; 2795 struct vnode **a_vpp; 2796 daddr_t *a_bnp; 2797 int *a_runp; 2798 } */ *ap = v; 2799 struct vnode *vp = ap->a_vp; 2800 2801 /* 2802 * XXX vpp should be returned unlocked? 2803 */ 2804 if (ap->a_vpp != NULL) 2805 *ap->a_vpp = vp; 2806 if (ap->a_bnp != NULL) 2807 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2808 return (0); 2809 } 2810 2811 /* 2812 * Strategy routine. 2813 * For async requests when nfsiod(s) are running, queue the request by 2814 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2815 * request. 2816 */ 2817 int 2818 nfs_strategy(v) 2819 void *v; 2820 { 2821 struct vop_strategy_args *ap = v; 2822 struct buf *bp = ap->a_bp; 2823 struct proc *p; 2824 int error = 0; 2825 2826 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2827 panic("nfs physio/async"); 2828 if (bp->b_flags & B_ASYNC) 2829 p = NULL; 2830 else 2831 p = curproc; /* XXX */ 2832 2833 /* 2834 * If the op is asynchronous and an i/o daemon is waiting 2835 * queue the request, wake it up and wait for completion 2836 * otherwise just do it ourselves. 2837 */ 2838 2839 if ((bp->b_flags & B_ASYNC) == 0 || 2840 nfs_asyncio(bp)) 2841 error = nfs_doio(bp, p); 2842 return (error); 2843 } 2844 2845 /* 2846 * fsync vnode op. Just call nfs_flush() with commit == 1. 2847 */ 2848 /* ARGSUSED */ 2849 int 2850 nfs_fsync(v) 2851 void *v; 2852 { 2853 struct vop_fsync_args /* { 2854 struct vnodeop_desc *a_desc; 2855 struct vnode * a_vp; 2856 struct ucred * a_cred; 2857 int a_flags; 2858 off_t offlo; 2859 off_t offhi; 2860 struct proc * a_p; 2861 } */ *ap = v; 2862 2863 return (nfs_flush(ap->a_vp, ap->a_cred, 2864 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2865 } 2866 2867 /* 2868 * Flush all the data associated with a vnode. 2869 */ 2870 int 2871 nfs_flush(vp, cred, waitfor, p, commit) 2872 struct vnode *vp; 2873 struct ucred *cred; 2874 int waitfor; 2875 struct proc *p; 2876 int commit; 2877 { 2878 struct uvm_object *uobj = &vp->v_uvm.u_obj; 2879 struct nfsnode *np = VTONFS(vp); 2880 int error; 2881 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2882 int rv; 2883 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2884 2885 error = 0; 2886 simple_lock(&uobj->vmobjlock); 2887 rv = (uobj->pgops->pgo_flush)(uobj, 0, 0, flushflags); 2888 simple_unlock(&uobj->vmobjlock); 2889 if (!rv) { 2890 error = EIO; 2891 } 2892 if (np->n_flag & NWRITEERR) { 2893 error = np->n_error; 2894 np->n_flag &= ~NWRITEERR; 2895 } 2896 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2897 return (error); 2898 } 2899 2900 /* 2901 * Return POSIX pathconf information applicable to nfs. 2902 * 2903 * N.B. The NFS V2 protocol doesn't support this RPC. 2904 */ 2905 /* ARGSUSED */ 2906 int 2907 nfs_pathconf(v) 2908 void *v; 2909 { 2910 struct vop_pathconf_args /* { 2911 struct vnode *a_vp; 2912 int a_name; 2913 register_t *a_retval; 2914 } */ *ap = v; 2915 struct nfsv3_pathconf *pcp; 2916 struct vnode *vp = ap->a_vp; 2917 struct nfsmount *nmp; 2918 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2919 int32_t t1, t2; 2920 u_int32_t *tl; 2921 caddr_t bpos, dpos, cp, cp2; 2922 int error = 0, attrflag; 2923 unsigned int l; 2924 u_int64_t maxsize; 2925 const int v3 = NFS_ISV3(vp); 2926 2927 switch (ap->a_name) { 2928 /* Names that can be resolved locally. */ 2929 case _PC_PIPE_BUF: 2930 *ap->a_retval = PIPE_BUF; 2931 break; 2932 case _PC_SYNC_IO: 2933 *ap->a_retval = 1; 2934 break; 2935 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2936 case _PC_LINK_MAX: 2937 case _PC_NAME_MAX: 2938 case _PC_CHOWN_RESTRICTED: 2939 case _PC_NO_TRUNC: 2940 if (!v3) { 2941 error = EINVAL; 2942 break; 2943 } 2944 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2945 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2946 nfsm_fhtom(vp, 1); 2947 nfsm_request(vp, NFSPROC_PATHCONF, 2948 curproc, curproc->p_ucred); /* XXX */ 2949 nfsm_postop_attr(vp, attrflag); 2950 if (!error) { 2951 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2952 NFSX_V3PATHCONF); 2953 switch (ap->a_name) { 2954 case _PC_LINK_MAX: 2955 *ap->a_retval = 2956 fxdr_unsigned(register_t, pcp->pc_linkmax); 2957 break; 2958 case _PC_NAME_MAX: 2959 *ap->a_retval = 2960 fxdr_unsigned(register_t, pcp->pc_namemax); 2961 break; 2962 case _PC_CHOWN_RESTRICTED: 2963 *ap->a_retval = 2964 (pcp->pc_chownrestricted == nfs_true); 2965 break; 2966 case _PC_NO_TRUNC: 2967 *ap->a_retval = 2968 (pcp->pc_notrunc == nfs_true); 2969 break; 2970 } 2971 } 2972 nfsm_reqdone; 2973 break; 2974 case _PC_FILESIZEBITS: 2975 if (v3) { 2976 nmp = VFSTONFS(vp->v_mount); 2977 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2978 if ((error = nfs_fsinfo(nmp, vp, 2979 curproc->p_ucred, curproc)) != 0) /* XXX */ 2980 break; 2981 for (l = 0, maxsize = nmp->nm_maxfilesize; 2982 (maxsize >> l) > 0; l++) 2983 ; 2984 *ap->a_retval = l + 1; 2985 } else { 2986 *ap->a_retval = 32; /* NFS V2 limitation */ 2987 } 2988 break; 2989 default: 2990 error = EINVAL; 2991 break; 2992 } 2993 2994 return (error); 2995 } 2996 2997 /* 2998 * NFS advisory byte-level locks. 2999 */ 3000 int 3001 nfs_advlock(v) 3002 void *v; 3003 { 3004 struct vop_advlock_args /* { 3005 struct vnode *a_vp; 3006 caddr_t a_id; 3007 int a_op; 3008 struct flock *a_fl; 3009 int a_flags; 3010 } */ *ap = v; 3011 struct nfsnode *np = VTONFS(ap->a_vp); 3012 3013 return lf_advlock(ap, &np->n_lockf, np->n_size); 3014 } 3015 3016 /* 3017 * Print out the contents of an nfsnode. 3018 */ 3019 int 3020 nfs_print(v) 3021 void *v; 3022 { 3023 struct vop_print_args /* { 3024 struct vnode *a_vp; 3025 } */ *ap = v; 3026 struct vnode *vp = ap->a_vp; 3027 struct nfsnode *np = VTONFS(vp); 3028 3029 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3030 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3031 if (vp->v_type == VFIFO) 3032 fifo_printinfo(vp); 3033 printf("\n"); 3034 return (0); 3035 } 3036 3037 /* 3038 * NFS file truncation. 3039 */ 3040 int 3041 nfs_truncate(v) 3042 void *v; 3043 { 3044 #if 0 3045 struct vop_truncate_args /* { 3046 struct vnode *a_vp; 3047 off_t a_length; 3048 int a_flags; 3049 struct ucred *a_cred; 3050 struct proc *a_p; 3051 } */ *ap = v; 3052 #endif 3053 3054 /* Use nfs_setattr */ 3055 return (EOPNOTSUPP); 3056 } 3057 3058 /* 3059 * NFS update. 3060 */ 3061 int 3062 nfs_update(v) 3063 void *v; 3064 #if 0 3065 struct vop_update_args /* { 3066 struct vnode *a_vp; 3067 struct timespec *a_ta; 3068 struct timespec *a_tm; 3069 int a_waitfor; 3070 } */ *ap = v; 3071 #endif 3072 { 3073 3074 /* Use nfs_setattr */ 3075 return (EOPNOTSUPP); 3076 } 3077 3078 /* 3079 * Just call bwrite(). 3080 */ 3081 int 3082 nfs_bwrite(v) 3083 void *v; 3084 { 3085 struct vop_bwrite_args /* { 3086 struct vnode *a_bp; 3087 } */ *ap = v; 3088 3089 return (bwrite(ap->a_bp)); 3090 } 3091 3092 /* 3093 * nfs special file access vnode op. 3094 * Essentially just get vattr and then imitate iaccess() since the device is 3095 * local to the client. 3096 */ 3097 int 3098 nfsspec_access(v) 3099 void *v; 3100 { 3101 struct vop_access_args /* { 3102 struct vnode *a_vp; 3103 int a_mode; 3104 struct ucred *a_cred; 3105 struct proc *a_p; 3106 } */ *ap = v; 3107 struct vattr va; 3108 struct vnode *vp = ap->a_vp; 3109 int error; 3110 3111 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3112 if (error) 3113 return (error); 3114 3115 /* 3116 * Disallow write attempts on filesystems mounted read-only; 3117 * unless the file is a socket, fifo, or a block or character 3118 * device resident on the filesystem. 3119 */ 3120 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3121 switch (vp->v_type) { 3122 case VREG: 3123 case VDIR: 3124 case VLNK: 3125 return (EROFS); 3126 default: 3127 break; 3128 } 3129 } 3130 3131 return (vaccess(va.va_type, va.va_mode, 3132 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3133 } 3134 3135 /* 3136 * Read wrapper for special devices. 3137 */ 3138 int 3139 nfsspec_read(v) 3140 void *v; 3141 { 3142 struct vop_read_args /* { 3143 struct vnode *a_vp; 3144 struct uio *a_uio; 3145 int a_ioflag; 3146 struct ucred *a_cred; 3147 } */ *ap = v; 3148 struct nfsnode *np = VTONFS(ap->a_vp); 3149 3150 /* 3151 * Set access flag. 3152 */ 3153 np->n_flag |= NACC; 3154 np->n_atim.tv_sec = time.tv_sec; 3155 np->n_atim.tv_nsec = time.tv_usec * 1000; 3156 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3157 } 3158 3159 /* 3160 * Write wrapper for special devices. 3161 */ 3162 int 3163 nfsspec_write(v) 3164 void *v; 3165 { 3166 struct vop_write_args /* { 3167 struct vnode *a_vp; 3168 struct uio *a_uio; 3169 int a_ioflag; 3170 struct ucred *a_cred; 3171 } */ *ap = v; 3172 struct nfsnode *np = VTONFS(ap->a_vp); 3173 3174 /* 3175 * Set update flag. 3176 */ 3177 np->n_flag |= NUPD; 3178 np->n_mtim.tv_sec = time.tv_sec; 3179 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3180 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3181 } 3182 3183 /* 3184 * Close wrapper for special devices. 3185 * 3186 * Update the times on the nfsnode then do device close. 3187 */ 3188 int 3189 nfsspec_close(v) 3190 void *v; 3191 { 3192 struct vop_close_args /* { 3193 struct vnode *a_vp; 3194 int a_fflag; 3195 struct ucred *a_cred; 3196 struct proc *a_p; 3197 } */ *ap = v; 3198 struct vnode *vp = ap->a_vp; 3199 struct nfsnode *np = VTONFS(vp); 3200 struct vattr vattr; 3201 3202 if (np->n_flag & (NACC | NUPD)) { 3203 np->n_flag |= NCHG; 3204 if (vp->v_usecount == 1 && 3205 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3206 VATTR_NULL(&vattr); 3207 if (np->n_flag & NACC) 3208 vattr.va_atime = np->n_atim; 3209 if (np->n_flag & NUPD) 3210 vattr.va_mtime = np->n_mtim; 3211 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3212 } 3213 } 3214 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3215 } 3216 3217 /* 3218 * Read wrapper for fifos. 3219 */ 3220 int 3221 nfsfifo_read(v) 3222 void *v; 3223 { 3224 struct vop_read_args /* { 3225 struct vnode *a_vp; 3226 struct uio *a_uio; 3227 int a_ioflag; 3228 struct ucred *a_cred; 3229 } */ *ap = v; 3230 struct nfsnode *np = VTONFS(ap->a_vp); 3231 3232 /* 3233 * Set access flag. 3234 */ 3235 np->n_flag |= NACC; 3236 np->n_atim.tv_sec = time.tv_sec; 3237 np->n_atim.tv_nsec = time.tv_usec * 1000; 3238 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3239 } 3240 3241 /* 3242 * Write wrapper for fifos. 3243 */ 3244 int 3245 nfsfifo_write(v) 3246 void *v; 3247 { 3248 struct vop_write_args /* { 3249 struct vnode *a_vp; 3250 struct uio *a_uio; 3251 int a_ioflag; 3252 struct ucred *a_cred; 3253 } */ *ap = v; 3254 struct nfsnode *np = VTONFS(ap->a_vp); 3255 3256 /* 3257 * Set update flag. 3258 */ 3259 np->n_flag |= NUPD; 3260 np->n_mtim.tv_sec = time.tv_sec; 3261 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3262 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3263 } 3264 3265 /* 3266 * Close wrapper for fifos. 3267 * 3268 * Update the times on the nfsnode then do fifo close. 3269 */ 3270 int 3271 nfsfifo_close(v) 3272 void *v; 3273 { 3274 struct vop_close_args /* { 3275 struct vnode *a_vp; 3276 int a_fflag; 3277 struct ucred *a_cred; 3278 struct proc *a_p; 3279 } */ *ap = v; 3280 struct vnode *vp = ap->a_vp; 3281 struct nfsnode *np = VTONFS(vp); 3282 struct vattr vattr; 3283 3284 if (np->n_flag & (NACC | NUPD)) { 3285 if (np->n_flag & NACC) { 3286 np->n_atim.tv_sec = time.tv_sec; 3287 np->n_atim.tv_nsec = time.tv_usec * 1000; 3288 } 3289 if (np->n_flag & NUPD) { 3290 np->n_mtim.tv_sec = time.tv_sec; 3291 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3292 } 3293 np->n_flag |= NCHG; 3294 if (vp->v_usecount == 1 && 3295 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3296 VATTR_NULL(&vattr); 3297 if (np->n_flag & NACC) 3298 vattr.va_atime = np->n_atim; 3299 if (np->n_flag & NUPD) 3300 vattr.va_mtime = np->n_mtim; 3301 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3302 } 3303 } 3304 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3305 } 3306
Indexes created Mon Oct 13 16:09:52 GMT 2025