nfs_vnops.c revision 1.139
1 /* $NetBSD: nfs_vnops.c,v 1.139 2001/09/20 08:22:04 chs 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, genfs_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 { NULL, NULL } 201 }; 202 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 203 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 204 205 int (**fifo_nfsv2nodeop_p) __P((void *)); 206 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 207 { &vop_default_desc, vn_default_error }, 208 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 209 { &vop_create_desc, fifo_create }, /* create */ 210 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 211 { &vop_open_desc, fifo_open }, /* open */ 212 { &vop_close_desc, nfsfifo_close }, /* close */ 213 { &vop_access_desc, nfsspec_access }, /* access */ 214 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 215 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 216 { &vop_read_desc, nfsfifo_read }, /* read */ 217 { &vop_write_desc, nfsfifo_write }, /* write */ 218 { &vop_lease_desc, fifo_lease_check }, /* lease */ 219 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 220 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 221 { &vop_poll_desc, fifo_poll }, /* poll */ 222 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 223 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 224 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 225 { &vop_seek_desc, fifo_seek }, /* seek */ 226 { &vop_remove_desc, fifo_remove }, /* remove */ 227 { &vop_link_desc, fifo_link }, /* link */ 228 { &vop_rename_desc, fifo_rename }, /* rename */ 229 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 230 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 231 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 232 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 233 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 234 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 235 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 236 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 237 { &vop_lock_desc, nfs_lock }, /* lock */ 238 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 239 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 240 { &vop_strategy_desc, genfs_badop }, /* strategy */ 241 { &vop_print_desc, nfs_print }, /* print */ 242 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 243 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 244 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 245 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 246 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 247 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 248 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 249 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 250 { &vop_update_desc, nfs_update }, /* update */ 251 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 252 { NULL, NULL } 253 }; 254 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 255 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 256 257 /* 258 * Global variables 259 */ 260 extern u_int32_t nfs_true, nfs_false; 261 extern u_int32_t nfs_xdrneg1; 262 extern struct nfsstats nfsstats; 263 extern nfstype nfsv3_type[9]; 264 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 265 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 266 int nfs_numasync = 0; 267 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 268 269 /* 270 * nfs null call from vfs. 271 */ 272 int 273 nfs_null(vp, cred, procp) 274 struct vnode *vp; 275 struct ucred *cred; 276 struct proc *procp; 277 { 278 caddr_t bpos, dpos; 279 int error = 0; 280 struct mbuf *mreq, *mrep, *md, *mb; 281 282 nfsm_reqhead(vp, NFSPROC_NULL, 0); 283 nfsm_request(vp, NFSPROC_NULL, procp, cred); 284 nfsm_reqdone; 285 return (error); 286 } 287 288 /* 289 * nfs access vnode op. 290 * For nfs version 2, just return ok. File accesses may fail later. 291 * For nfs version 3, use the access rpc to check accessibility. If file modes 292 * are changed on the server, accesses might still fail later. 293 */ 294 int 295 nfs_access(v) 296 void *v; 297 { 298 struct vop_access_args /* { 299 struct vnode *a_vp; 300 int a_mode; 301 struct ucred *a_cred; 302 struct proc *a_p; 303 } */ *ap = v; 304 struct vnode *vp = ap->a_vp; 305 u_int32_t *tl; 306 caddr_t cp; 307 int32_t t1, t2; 308 caddr_t bpos, dpos, cp2; 309 int error = 0, attrflag, cachevalid; 310 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 311 u_int32_t mode, rmode; 312 const int v3 = NFS_ISV3(vp); 313 struct nfsnode *np = VTONFS(vp); 314 315 cachevalid = (np->n_accstamp != -1 && 316 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 317 np->n_accuid == ap->a_cred->cr_uid); 318 319 /* 320 * Check access cache first. If this request has been made for this 321 * uid shortly before, use the cached result. 322 */ 323 if (cachevalid) { 324 if (!np->n_accerror) { 325 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 326 return np->n_accerror; 327 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 328 return np->n_accerror; 329 } 330 331 /* 332 * For nfs v3, do an access rpc, otherwise you are stuck emulating 333 * ufs_access() locally using the vattr. This may not be correct, 334 * since the server may apply other access criteria such as 335 * client uid-->server uid mapping that we do not know about, but 336 * this is better than just returning anything that is lying about 337 * in the cache. 338 */ 339 if (v3) { 340 nfsstats.rpccnt[NFSPROC_ACCESS]++; 341 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 342 nfsm_fhtom(vp, v3); 343 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 344 if (ap->a_mode & VREAD) 345 mode = NFSV3ACCESS_READ; 346 else 347 mode = 0; 348 if (vp->v_type != VDIR) { 349 if (ap->a_mode & VWRITE) 350 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 351 if (ap->a_mode & VEXEC) 352 mode |= NFSV3ACCESS_EXECUTE; 353 } else { 354 if (ap->a_mode & VWRITE) 355 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 356 NFSV3ACCESS_DELETE); 357 if (ap->a_mode & VEXEC) 358 mode |= NFSV3ACCESS_LOOKUP; 359 } 360 *tl = txdr_unsigned(mode); 361 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 362 nfsm_postop_attr(vp, attrflag); 363 if (!error) { 364 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 365 rmode = fxdr_unsigned(u_int32_t, *tl); 366 /* 367 * The NFS V3 spec does not clarify whether or not 368 * the returned access bits can be a superset of 369 * the ones requested, so... 370 */ 371 if ((rmode & mode) != mode) 372 error = EACCES; 373 } 374 nfsm_reqdone; 375 } else 376 return (nfsspec_access(ap)); 377 /* 378 * Disallow write attempts on filesystems mounted read-only; 379 * unless the file is a socket, fifo, or a block or character 380 * device resident on the filesystem. 381 */ 382 if (!error && (ap->a_mode & VWRITE) && 383 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 384 switch (vp->v_type) { 385 case VREG: 386 case VDIR: 387 case VLNK: 388 error = EROFS; 389 default: 390 break; 391 } 392 } 393 394 if (!error || error == EACCES) { 395 /* 396 * If we got the same result as for a previous, 397 * different request, OR it in. Don't update 398 * the timestamp in that case. 399 */ 400 if (cachevalid && error == np->n_accerror) { 401 if (!error) 402 np->n_accmode |= ap->a_mode; 403 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 404 np->n_accmode = ap->a_mode; 405 } else { 406 np->n_accstamp = time.tv_sec; 407 np->n_accuid = ap->a_cred->cr_uid; 408 np->n_accmode = ap->a_mode; 409 np->n_accerror = error; 410 } 411 } 412 413 return (error); 414 } 415 416 /* 417 * nfs open vnode op 418 * Check to see if the type is ok 419 * and that deletion is not in progress. 420 * For paged in text files, you will need to flush the page cache 421 * if consistency is lost. 422 */ 423 /* ARGSUSED */ 424 int 425 nfs_open(v) 426 void *v; 427 { 428 struct vop_open_args /* { 429 struct vnode *a_vp; 430 int a_mode; 431 struct ucred *a_cred; 432 struct proc *a_p; 433 } */ *ap = v; 434 struct vnode *vp = ap->a_vp; 435 struct nfsnode *np = VTONFS(vp); 436 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 437 struct vattr vattr; 438 int error; 439 440 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 441 return (EACCES); 442 } 443 444 /* 445 * Initialize read and write creds here, for swapfiles 446 * and other paths that don't set the creds themselves. 447 */ 448 449 if (ap->a_mode & FREAD) { 450 if (np->n_rcred) { 451 crfree(np->n_rcred); 452 } 453 np->n_rcred = ap->a_cred; 454 crhold(np->n_rcred); 455 } 456 if (ap->a_mode & FWRITE) { 457 if (np->n_wcred) { 458 crfree(np->n_wcred); 459 } 460 np->n_wcred = ap->a_cred; 461 crhold(np->n_wcred); 462 } 463 464 #ifndef NFS_V2_ONLY 465 /* 466 * Get a valid lease. If cached data is stale, flush it. 467 */ 468 if (nmp->nm_flag & NFSMNT_NQNFS) { 469 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 470 do { 471 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 472 ap->a_p); 473 } while (error == NQNFS_EXPIRED); 474 if (error) 475 return (error); 476 if (np->n_lrev != np->n_brev || 477 (np->n_flag & NQNFSNONCACHE)) { 478 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 479 ap->a_p, 1)) == EINTR) 480 return (error); 481 np->n_brev = np->n_lrev; 482 } 483 } 484 } else 485 #endif 486 { 487 if (np->n_flag & NMODIFIED) { 488 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 489 ap->a_p, 1)) == EINTR) 490 return (error); 491 np->n_attrstamp = 0; 492 if (vp->v_type == VDIR) { 493 nfs_invaldircache(vp, 0); 494 np->n_direofoffset = 0; 495 } 496 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 497 if (error) 498 return (error); 499 np->n_mtime = vattr.va_mtime.tv_sec; 500 } else { 501 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 502 if (error) 503 return (error); 504 if (np->n_mtime != vattr.va_mtime.tv_sec) { 505 if (vp->v_type == VDIR) { 506 nfs_invaldircache(vp, 0); 507 np->n_direofoffset = 0; 508 } 509 if ((error = nfs_vinvalbuf(vp, V_SAVE, 510 ap->a_cred, ap->a_p, 1)) == EINTR) 511 return (error); 512 np->n_mtime = vattr.va_mtime.tv_sec; 513 } 514 } 515 } 516 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 517 np->n_attrstamp = 0; /* For Open/Close consistency */ 518 return (0); 519 } 520 521 /* 522 * nfs close vnode op 523 * What an NFS client should do upon close after writing is a debatable issue. 524 * Most NFS clients push delayed writes to the server upon close, basically for 525 * two reasons: 526 * 1 - So that any write errors may be reported back to the client process 527 * doing the close system call. By far the two most likely errors are 528 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 529 * 2 - To put a worst case upper bound on cache inconsistency between 530 * multiple clients for the file. 531 * There is also a consistency problem for Version 2 of the protocol w.r.t. 532 * not being able to tell if other clients are writing a file concurrently, 533 * since there is no way of knowing if the changed modify time in the reply 534 * is only due to the write for this client. 535 * (NFS Version 3 provides weak cache consistency data in the reply that 536 * should be sufficient to detect and handle this case.) 537 * 538 * The current code does the following: 539 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 540 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 541 * or commit them (this satisfies 1 and 2 except for the 542 * case where the server crashes after this close but 543 * before the commit RPC, which is felt to be "good 544 * enough". Changing the last argument to nfs_flush() to 545 * a 1 would force a commit operation, if it is felt a 546 * commit is necessary now. 547 * for NQNFS - do nothing now, since 2 is dealt with via leases and 548 * 1 should be dealt with via an fsync() system call for 549 * cases where write errors are important. 550 */ 551 /* ARGSUSED */ 552 int 553 nfs_close(v) 554 void *v; 555 { 556 struct vop_close_args /* { 557 struct vnodeop_desc *a_desc; 558 struct vnode *a_vp; 559 int a_fflag; 560 struct ucred *a_cred; 561 struct proc *a_p; 562 } */ *ap = v; 563 struct vnode *vp = ap->a_vp; 564 struct nfsnode *np = VTONFS(vp); 565 int error = 0; 566 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 567 568 if (vp->v_type == VREG) { 569 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 570 (np->n_flag & NMODIFIED)) { 571 if (NFS_ISV3(vp)) { 572 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 573 np->n_flag &= ~NMODIFIED; 574 } else 575 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 576 np->n_attrstamp = 0; 577 } 578 if (np->n_flag & NWRITEERR) { 579 np->n_flag &= ~NWRITEERR; 580 error = np->n_error; 581 } 582 } 583 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 584 return (error); 585 } 586 587 /* 588 * nfs getattr call from vfs. 589 */ 590 int 591 nfs_getattr(v) 592 void *v; 593 { 594 struct vop_getattr_args /* { 595 struct vnode *a_vp; 596 struct vattr *a_vap; 597 struct ucred *a_cred; 598 struct proc *a_p; 599 } */ *ap = v; 600 struct vnode *vp = ap->a_vp; 601 struct nfsnode *np = VTONFS(vp); 602 caddr_t cp; 603 u_int32_t *tl; 604 int32_t t1, t2; 605 caddr_t bpos, dpos; 606 int error = 0; 607 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 608 const int v3 = NFS_ISV3(vp); 609 610 /* 611 * Update local times for special files. 612 */ 613 if (np->n_flag & (NACC | NUPD)) 614 np->n_flag |= NCHG; 615 /* 616 * First look in the cache. 617 */ 618 if (nfs_getattrcache(vp, ap->a_vap) == 0) 619 return (0); 620 nfsstats.rpccnt[NFSPROC_GETATTR]++; 621 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 622 nfsm_fhtom(vp, v3); 623 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 624 if (!error) { 625 nfsm_loadattr(vp, ap->a_vap); 626 if (vp->v_type == VDIR && 627 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 628 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 629 } 630 nfsm_reqdone; 631 return (error); 632 } 633 634 /* 635 * nfs setattr call. 636 */ 637 int 638 nfs_setattr(v) 639 void *v; 640 { 641 struct vop_setattr_args /* { 642 struct vnodeop_desc *a_desc; 643 struct vnode *a_vp; 644 struct vattr *a_vap; 645 struct ucred *a_cred; 646 struct proc *a_p; 647 } */ *ap = v; 648 struct vnode *vp = ap->a_vp; 649 struct nfsnode *np = VTONFS(vp); 650 struct vattr *vap = ap->a_vap; 651 int error = 0; 652 u_quad_t tsize = 0; 653 654 /* 655 * Setting of flags is not supported. 656 */ 657 if (vap->va_flags != VNOVAL) 658 return (EOPNOTSUPP); 659 660 /* 661 * Disallow write attempts if the filesystem is mounted read-only. 662 */ 663 if ((vap->va_uid != (uid_t)VNOVAL || 664 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 665 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 666 (vp->v_mount->mnt_flag & MNT_RDONLY)) 667 return (EROFS); 668 if (vap->va_size != VNOVAL) { 669 switch (vp->v_type) { 670 case VDIR: 671 return (EISDIR); 672 case VCHR: 673 case VBLK: 674 case VSOCK: 675 case VFIFO: 676 if (vap->va_mtime.tv_sec == VNOVAL && 677 vap->va_atime.tv_sec == VNOVAL && 678 vap->va_mode == (mode_t)VNOVAL && 679 vap->va_uid == (uid_t)VNOVAL && 680 vap->va_gid == (gid_t)VNOVAL) 681 return (0); 682 vap->va_size = VNOVAL; 683 break; 684 default: 685 /* 686 * Disallow write attempts if the filesystem is 687 * mounted read-only. 688 */ 689 if (vp->v_mount->mnt_flag & MNT_RDONLY) 690 return (EROFS); 691 uvm_vnp_setsize(vp, vap->va_size); 692 if (vap->va_size == 0) 693 error = nfs_vinvalbuf(vp, 0, 694 ap->a_cred, ap->a_p, 1); 695 else 696 error = nfs_vinvalbuf(vp, V_SAVE, 697 ap->a_cred, ap->a_p, 1); 698 if (error) { 699 uvm_vnp_setsize(vp, np->n_size); 700 return (error); 701 } 702 tsize = np->n_size; 703 np->n_size = np->n_vattr->va_size = vap->va_size; 704 } 705 } else if ((vap->va_mtime.tv_sec != VNOVAL || 706 vap->va_atime.tv_sec != VNOVAL) && 707 vp->v_type == VREG && 708 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 709 ap->a_p, 1)) == EINTR) 710 return (error); 711 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 712 if (error && vap->va_size != VNOVAL) { 713 np->n_size = np->n_vattr->va_size = tsize; 714 uvm_vnp_setsize(vp, np->n_size); 715 } 716 return (error); 717 } 718 719 /* 720 * Do an nfs setattr rpc. 721 */ 722 int 723 nfs_setattrrpc(vp, vap, cred, procp) 724 struct vnode *vp; 725 struct vattr *vap; 726 struct ucred *cred; 727 struct proc *procp; 728 { 729 struct nfsv2_sattr *sp; 730 caddr_t cp; 731 int32_t t1, t2; 732 caddr_t bpos, dpos, cp2; 733 u_int32_t *tl; 734 int error = 0, wccflag = NFSV3_WCCRATTR; 735 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 736 const int v3 = NFS_ISV3(vp); 737 738 nfsstats.rpccnt[NFSPROC_SETATTR]++; 739 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 740 nfsm_fhtom(vp, v3); 741 if (v3) { 742 nfsm_v3attrbuild(vap, TRUE); 743 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 744 *tl = nfs_false; 745 } else { 746 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 747 if (vap->va_mode == (mode_t)VNOVAL) 748 sp->sa_mode = nfs_xdrneg1; 749 else 750 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 751 if (vap->va_uid == (uid_t)VNOVAL) 752 sp->sa_uid = nfs_xdrneg1; 753 else 754 sp->sa_uid = txdr_unsigned(vap->va_uid); 755 if (vap->va_gid == (gid_t)VNOVAL) 756 sp->sa_gid = nfs_xdrneg1; 757 else 758 sp->sa_gid = txdr_unsigned(vap->va_gid); 759 sp->sa_size = txdr_unsigned(vap->va_size); 760 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 761 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 762 } 763 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 764 if (v3) { 765 nfsm_wcc_data(vp, wccflag); 766 } else 767 nfsm_loadattr(vp, (struct vattr *)0); 768 nfsm_reqdone; 769 return (error); 770 } 771 772 /* 773 * nfs lookup call, one step at a time... 774 * First look in cache 775 * If not found, unlock the directory nfsnode and do the rpc 776 * 777 * This code is full of lock/unlock statements and checks, because 778 * we continue after cache_lookup has finished (we need to check 779 * with the attr cache and do an rpc if it has timed out). This means 780 * that the locking effects of cache_lookup have to be taken into 781 * account. 782 */ 783 int 784 nfs_lookup(v) 785 void *v; 786 { 787 struct vop_lookup_args /* { 788 struct vnodeop_desc *a_desc; 789 struct vnode *a_dvp; 790 struct vnode **a_vpp; 791 struct componentname *a_cnp; 792 } */ *ap = v; 793 struct componentname *cnp = ap->a_cnp; 794 struct vnode *dvp = ap->a_dvp; 795 struct vnode **vpp = ap->a_vpp; 796 int flags; 797 struct vnode *newvp; 798 u_int32_t *tl; 799 caddr_t cp; 800 int32_t t1, t2; 801 struct nfsmount *nmp; 802 caddr_t bpos, dpos, cp2; 803 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 804 long len; 805 nfsfh_t *fhp; 806 struct nfsnode *np; 807 int lockparent, wantparent, error = 0, attrflag, fhsize; 808 const int v3 = NFS_ISV3(dvp); 809 810 cnp->cn_flags &= ~PDIRUNLOCK; 811 flags = cnp->cn_flags; 812 813 *vpp = NULLVP; 814 newvp = NULLVP; 815 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 816 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 817 return (EROFS); 818 if (dvp->v_type != VDIR) 819 return (ENOTDIR); 820 821 lockparent = flags & LOCKPARENT; 822 wantparent = flags & (LOCKPARENT|WANTPARENT); 823 nmp = VFSTONFS(dvp->v_mount); 824 np = VTONFS(dvp); 825 826 /* 827 * Before tediously performing a linear scan of the directory, 828 * check the name cache to see if the directory/name pair 829 * we are looking for is known already. 830 * If the directory/name pair is found in the name cache, 831 * we have to ensure the directory has not changed from 832 * the time the cache entry has been created. If it has, 833 * the cache entry has to be ignored 834 */ 835 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 836 struct vattr vattr; 837 int err2; 838 839 if (error && error != ENOENT) { 840 *vpp = NULLVP; 841 return error; 842 } 843 844 if (cnp->cn_flags & PDIRUNLOCK) { 845 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 846 if (err2 != 0) { 847 *vpp = NULLVP; 848 return err2; 849 } 850 cnp->cn_flags &= ~PDIRUNLOCK; 851 } 852 853 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 854 if (err2 != 0) { 855 if (error == 0) { 856 if (*vpp != dvp) 857 vput(*vpp); 858 else 859 vrele(*vpp); 860 } 861 *vpp = NULLVP; 862 return err2; 863 } 864 865 if (error == ENOENT) { 866 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 867 cnp->cn_proc) && vattr.va_mtime.tv_sec == 868 VTONFS(dvp)->n_nctime) 869 return ENOENT; 870 cache_purge(dvp); 871 np->n_nctime = 0; 872 goto dorpc; 873 } 874 875 newvp = *vpp; 876 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 877 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 878 { 879 nfsstats.lookupcache_hits++; 880 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 881 cnp->cn_flags |= SAVENAME; 882 if ((!lockparent || !(flags & ISLASTCN)) && 883 newvp != dvp) 884 VOP_UNLOCK(dvp, 0); 885 return (0); 886 } 887 cache_purge(newvp); 888 if (newvp != dvp) 889 vput(newvp); 890 else 891 vrele(newvp); 892 *vpp = NULLVP; 893 } 894 dorpc: 895 error = 0; 896 newvp = NULLVP; 897 nfsstats.lookupcache_misses++; 898 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 899 len = cnp->cn_namelen; 900 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 901 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 902 nfsm_fhtom(dvp, v3); 903 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 904 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 905 if (error) { 906 nfsm_postop_attr(dvp, attrflag); 907 m_freem(mrep); 908 goto nfsmout; 909 } 910 nfsm_getfh(fhp, fhsize, v3); 911 912 /* 913 * Handle RENAME case... 914 */ 915 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 916 if (NFS_CMPFH(np, fhp, fhsize)) { 917 m_freem(mrep); 918 return (EISDIR); 919 } 920 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 921 if (error) { 922 m_freem(mrep); 923 return error; 924 } 925 newvp = NFSTOV(np); 926 if (v3) { 927 nfsm_postop_attr(newvp, attrflag); 928 nfsm_postop_attr(dvp, attrflag); 929 } else 930 nfsm_loadattr(newvp, (struct vattr *)0); 931 *vpp = newvp; 932 m_freem(mrep); 933 cnp->cn_flags |= SAVENAME; 934 if (!lockparent) { 935 VOP_UNLOCK(dvp, 0); 936 cnp->cn_flags |= PDIRUNLOCK; 937 } 938 return (0); 939 } 940 941 /* 942 * The postop attr handling is duplicated for each if case, 943 * because it should be done while dvp is locked (unlocking 944 * dvp is different for each case). 945 */ 946 947 if (NFS_CMPFH(np, fhp, fhsize)) { 948 /* 949 * "." lookup 950 */ 951 VREF(dvp); 952 newvp = dvp; 953 if (v3) { 954 nfsm_postop_attr(newvp, attrflag); 955 nfsm_postop_attr(dvp, attrflag); 956 } else 957 nfsm_loadattr(newvp, (struct vattr *)0); 958 } else if (flags & ISDOTDOT) { 959 /* 960 * ".." lookup 961 */ 962 VOP_UNLOCK(dvp, 0); 963 cnp->cn_flags |= PDIRUNLOCK; 964 965 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 966 if (error) { 967 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 968 cnp->cn_flags &= ~PDIRUNLOCK; 969 m_freem(mrep); 970 return error; 971 } 972 newvp = NFSTOV(np); 973 974 if (v3) { 975 nfsm_postop_attr(newvp, attrflag); 976 nfsm_postop_attr(dvp, attrflag); 977 } else 978 nfsm_loadattr(newvp, (struct vattr *)0); 979 980 if (lockparent && (flags & ISLASTCN)) { 981 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 982 m_freem(mrep); 983 vput(newvp); 984 return error; 985 } 986 cnp->cn_flags &= ~PDIRUNLOCK; 987 } 988 } else { 989 /* 990 * Other lookups. 991 */ 992 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 993 if (error) { 994 m_freem(mrep); 995 return error; 996 } 997 newvp = NFSTOV(np); 998 if (v3) { 999 nfsm_postop_attr(newvp, attrflag); 1000 nfsm_postop_attr(dvp, attrflag); 1001 } else 1002 nfsm_loadattr(newvp, (struct vattr *)0); 1003 if (!lockparent || !(flags & ISLASTCN)) { 1004 VOP_UNLOCK(dvp, 0); 1005 cnp->cn_flags |= PDIRUNLOCK; 1006 } 1007 } 1008 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1009 cnp->cn_flags |= SAVENAME; 1010 if ((cnp->cn_flags & MAKEENTRY) && 1011 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1012 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1013 cache_enter(dvp, newvp, cnp); 1014 } 1015 *vpp = newvp; 1016 nfsm_reqdone; 1017 if (error) { 1018 /* 1019 * We get here only because of errors returned by 1020 * the RPC. Otherwise we'll have returned above 1021 * (the nfsm_* macros will jump to nfsm_reqdone 1022 * on error). 1023 */ 1024 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1025 cnp->cn_nameiop != CREATE) { 1026 if (VTONFS(dvp)->n_nctime == 0) 1027 VTONFS(dvp)->n_nctime = 1028 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1029 cache_enter(dvp, NULL, cnp); 1030 } 1031 if (newvp != NULLVP) { 1032 vrele(newvp); 1033 if (newvp != dvp) 1034 VOP_UNLOCK(newvp, 0); 1035 } 1036 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1037 (flags & ISLASTCN) && error == ENOENT) { 1038 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1039 error = EROFS; 1040 else 1041 error = EJUSTRETURN; 1042 } 1043 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1044 cnp->cn_flags |= SAVENAME; 1045 *vpp = NULL; 1046 } 1047 1048 return error; 1049 } 1050 1051 /* 1052 * nfs read call. 1053 * Just call nfs_bioread() to do the work. 1054 */ 1055 int 1056 nfs_read(v) 1057 void *v; 1058 { 1059 struct vop_read_args /* { 1060 struct vnode *a_vp; 1061 struct uio *a_uio; 1062 int a_ioflag; 1063 struct ucred *a_cred; 1064 } */ *ap = v; 1065 struct vnode *vp = ap->a_vp; 1066 1067 if (vp->v_type != VREG) 1068 return (EPERM); 1069 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1070 } 1071 1072 /* 1073 * nfs readlink call 1074 */ 1075 int 1076 nfs_readlink(v) 1077 void *v; 1078 { 1079 struct vop_readlink_args /* { 1080 struct vnode *a_vp; 1081 struct uio *a_uio; 1082 struct ucred *a_cred; 1083 } */ *ap = v; 1084 struct vnode *vp = ap->a_vp; 1085 1086 if (vp->v_type != VLNK) 1087 return (EPERM); 1088 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1089 } 1090 1091 /* 1092 * Do a readlink rpc. 1093 * Called by nfs_doio() from below the buffer cache. 1094 */ 1095 int 1096 nfs_readlinkrpc(vp, uiop, cred) 1097 struct vnode *vp; 1098 struct uio *uiop; 1099 struct ucred *cred; 1100 { 1101 u_int32_t *tl; 1102 caddr_t cp; 1103 int32_t t1, t2; 1104 caddr_t bpos, dpos, cp2; 1105 int error = 0, len, attrflag; 1106 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1107 const int v3 = NFS_ISV3(vp); 1108 1109 nfsstats.rpccnt[NFSPROC_READLINK]++; 1110 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1111 nfsm_fhtom(vp, v3); 1112 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1113 if (v3) 1114 nfsm_postop_attr(vp, attrflag); 1115 if (!error) { 1116 nfsm_strsiz(len, NFS_MAXPATHLEN); 1117 nfsm_mtouio(uiop, len); 1118 } 1119 nfsm_reqdone; 1120 return (error); 1121 } 1122 1123 /* 1124 * nfs read rpc call 1125 * Ditto above 1126 */ 1127 int 1128 nfs_readrpc(vp, uiop) 1129 struct vnode *vp; 1130 struct uio *uiop; 1131 { 1132 u_int32_t *tl; 1133 caddr_t cp; 1134 int32_t t1, t2; 1135 caddr_t bpos, dpos, cp2; 1136 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1137 struct nfsmount *nmp; 1138 int error = 0, len, retlen, tsiz, eof, attrflag; 1139 const int v3 = NFS_ISV3(vp); 1140 1141 #ifndef nolint 1142 eof = 0; 1143 #endif 1144 nmp = VFSTONFS(vp->v_mount); 1145 tsiz = uiop->uio_resid; 1146 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1147 return (EFBIG); 1148 while (tsiz > 0) { 1149 nfsstats.rpccnt[NFSPROC_READ]++; 1150 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1151 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1152 nfsm_fhtom(vp, v3); 1153 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1154 if (v3) { 1155 txdr_hyper(uiop->uio_offset, tl); 1156 *(tl + 2) = txdr_unsigned(len); 1157 } else { 1158 *tl++ = txdr_unsigned(uiop->uio_offset); 1159 *tl++ = txdr_unsigned(len); 1160 *tl = 0; 1161 } 1162 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1163 VTONFS(vp)->n_rcred); 1164 if (v3) { 1165 nfsm_postop_attr(vp, attrflag); 1166 if (error) { 1167 m_freem(mrep); 1168 goto nfsmout; 1169 } 1170 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1171 eof = fxdr_unsigned(int, *(tl + 1)); 1172 } else 1173 nfsm_loadattr(vp, (struct vattr *)0); 1174 nfsm_strsiz(retlen, nmp->nm_rsize); 1175 nfsm_mtouio(uiop, retlen); 1176 m_freem(mrep); 1177 tsiz -= retlen; 1178 if (v3) { 1179 if (eof || retlen == 0) 1180 tsiz = 0; 1181 } else if (retlen < len) 1182 tsiz = 0; 1183 } 1184 nfsmout: 1185 return (error); 1186 } 1187 1188 /* 1189 * nfs write call 1190 */ 1191 int 1192 nfs_writerpc(vp, uiop, iomode, must_commit) 1193 struct vnode *vp; 1194 struct uio *uiop; 1195 int *iomode, *must_commit; 1196 { 1197 u_int32_t *tl; 1198 caddr_t cp; 1199 int32_t t1, t2, backup; 1200 caddr_t bpos, dpos, cp2; 1201 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1202 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1203 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1204 const int v3 = NFS_ISV3(vp); 1205 int committed = NFSV3WRITE_FILESYNC; 1206 1207 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1208 panic("writerpc readonly vp %p", vp); 1209 } 1210 1211 #ifndef DIAGNOSTIC 1212 if (uiop->uio_iovcnt != 1) 1213 panic("nfs: writerpc iovcnt > 1"); 1214 #endif 1215 *must_commit = 0; 1216 tsiz = uiop->uio_resid; 1217 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1218 return (EFBIG); 1219 while (tsiz > 0) { 1220 nfsstats.rpccnt[NFSPROC_WRITE]++; 1221 len = min(tsiz, nmp->nm_wsize); 1222 nfsm_reqhead(vp, NFSPROC_WRITE, 1223 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1224 nfsm_fhtom(vp, v3); 1225 if (v3) { 1226 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1227 txdr_hyper(uiop->uio_offset, tl); 1228 tl += 2; 1229 *tl++ = txdr_unsigned(len); 1230 *tl++ = txdr_unsigned(*iomode); 1231 *tl = txdr_unsigned(len); 1232 } else { 1233 u_int32_t x; 1234 1235 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1236 /* Set both "begin" and "current" to non-garbage. */ 1237 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1238 *tl++ = x; /* "begin offset" */ 1239 *tl++ = x; /* "current offset" */ 1240 x = txdr_unsigned(len); 1241 *tl++ = x; /* total to this offset */ 1242 *tl = x; /* size of this write */ 1243 1244 } 1245 nfsm_uiotom(uiop, len); 1246 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1247 VTONFS(vp)->n_wcred); 1248 if (v3) { 1249 wccflag = NFSV3_WCCCHK; 1250 nfsm_wcc_data(vp, wccflag); 1251 if (!error) { 1252 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1253 + NFSX_V3WRITEVERF); 1254 rlen = fxdr_unsigned(int, *tl++); 1255 if (rlen == 0) { 1256 error = NFSERR_IO; 1257 m_freem(mrep); 1258 break; 1259 } else if (rlen < len) { 1260 backup = len - rlen; 1261 uiop->uio_iov->iov_base = 1262 (caddr_t)uiop->uio_iov->iov_base - 1263 backup; 1264 uiop->uio_iov->iov_len += backup; 1265 uiop->uio_offset -= backup; 1266 uiop->uio_resid += backup; 1267 len = rlen; 1268 } 1269 commit = fxdr_unsigned(int, *tl++); 1270 1271 /* 1272 * Return the lowest committment level 1273 * obtained by any of the RPCs. 1274 */ 1275 if (committed == NFSV3WRITE_FILESYNC) 1276 committed = commit; 1277 else if (committed == NFSV3WRITE_DATASYNC && 1278 commit == NFSV3WRITE_UNSTABLE) 1279 committed = commit; 1280 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1281 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1282 NFSX_V3WRITEVERF); 1283 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1284 } else if (memcmp((caddr_t)tl, 1285 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1286 *must_commit = 1; 1287 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1288 NFSX_V3WRITEVERF); 1289 } 1290 } 1291 } else 1292 nfsm_loadattr(vp, (struct vattr *)0); 1293 if (wccflag) 1294 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1295 m_freem(mrep); 1296 if (error) 1297 break; 1298 tsiz -= len; 1299 } 1300 nfsmout: 1301 *iomode = committed; 1302 if (error) 1303 uiop->uio_resid = tsiz; 1304 return (error); 1305 } 1306 1307 /* 1308 * nfs mknod rpc 1309 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1310 * mode set to specify the file type and the size field for rdev. 1311 */ 1312 int 1313 nfs_mknodrpc(dvp, vpp, cnp, vap) 1314 struct vnode *dvp; 1315 struct vnode **vpp; 1316 struct componentname *cnp; 1317 struct vattr *vap; 1318 { 1319 struct nfsv2_sattr *sp; 1320 u_int32_t *tl; 1321 caddr_t cp; 1322 int32_t t1, t2; 1323 struct vnode *newvp = (struct vnode *)0; 1324 struct nfsnode *np; 1325 char *cp2; 1326 caddr_t bpos, dpos; 1327 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1328 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1329 u_int32_t rdev; 1330 const int v3 = NFS_ISV3(dvp); 1331 1332 if (vap->va_type == VCHR || vap->va_type == VBLK) 1333 rdev = txdr_unsigned(vap->va_rdev); 1334 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1335 rdev = nfs_xdrneg1; 1336 else { 1337 VOP_ABORTOP(dvp, cnp); 1338 vput(dvp); 1339 return (EOPNOTSUPP); 1340 } 1341 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1342 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1343 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1344 nfsm_fhtom(dvp, v3); 1345 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1346 if (v3) { 1347 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1348 *tl++ = vtonfsv3_type(vap->va_type); 1349 nfsm_v3attrbuild(vap, FALSE); 1350 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1351 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1352 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1353 *tl = txdr_unsigned(minor(vap->va_rdev)); 1354 } 1355 } else { 1356 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1357 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1358 sp->sa_uid = nfs_xdrneg1; 1359 sp->sa_gid = nfs_xdrneg1; 1360 sp->sa_size = rdev; 1361 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1362 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1363 } 1364 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1365 if (!error) { 1366 nfsm_mtofh(dvp, newvp, v3, gotvp); 1367 if (!gotvp) { 1368 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1369 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1370 if (!error) 1371 newvp = NFSTOV(np); 1372 } 1373 } 1374 if (v3) 1375 nfsm_wcc_data(dvp, wccflag); 1376 nfsm_reqdone; 1377 if (error) { 1378 if (newvp) 1379 vput(newvp); 1380 } else { 1381 if (cnp->cn_flags & MAKEENTRY) 1382 cache_enter(dvp, newvp, cnp); 1383 *vpp = newvp; 1384 } 1385 PNBUF_PUT(cnp->cn_pnbuf); 1386 VTONFS(dvp)->n_flag |= NMODIFIED; 1387 if (!wccflag) 1388 VTONFS(dvp)->n_attrstamp = 0; 1389 vput(dvp); 1390 return (error); 1391 } 1392 1393 /* 1394 * nfs mknod vop 1395 * just call nfs_mknodrpc() to do the work. 1396 */ 1397 /* ARGSUSED */ 1398 int 1399 nfs_mknod(v) 1400 void *v; 1401 { 1402 struct vop_mknod_args /* { 1403 struct vnode *a_dvp; 1404 struct vnode **a_vpp; 1405 struct componentname *a_cnp; 1406 struct vattr *a_vap; 1407 } */ *ap = v; 1408 int error; 1409 1410 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1411 return (error); 1412 } 1413 1414 static u_long create_verf; 1415 /* 1416 * nfs file create call 1417 */ 1418 int 1419 nfs_create(v) 1420 void *v; 1421 { 1422 struct vop_create_args /* { 1423 struct vnode *a_dvp; 1424 struct vnode **a_vpp; 1425 struct componentname *a_cnp; 1426 struct vattr *a_vap; 1427 } */ *ap = v; 1428 struct vnode *dvp = ap->a_dvp; 1429 struct vattr *vap = ap->a_vap; 1430 struct componentname *cnp = ap->a_cnp; 1431 struct nfsv2_sattr *sp; 1432 u_int32_t *tl; 1433 caddr_t cp; 1434 int32_t t1, t2; 1435 struct nfsnode *np = (struct nfsnode *)0; 1436 struct vnode *newvp = (struct vnode *)0; 1437 caddr_t bpos, dpos, cp2; 1438 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1439 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1440 const int v3 = NFS_ISV3(dvp); 1441 1442 /* 1443 * Oops, not for me.. 1444 */ 1445 if (vap->va_type == VSOCK) 1446 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1447 1448 #ifdef VA_EXCLUSIVE 1449 if (vap->va_vaflags & VA_EXCLUSIVE) 1450 fmode |= O_EXCL; 1451 #endif 1452 again: 1453 error = 0; 1454 nfsstats.rpccnt[NFSPROC_CREATE]++; 1455 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1456 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1457 nfsm_fhtom(dvp, v3); 1458 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1459 if (v3) { 1460 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1461 if (fmode & O_EXCL) { 1462 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1463 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1464 #ifdef INET 1465 if (in_ifaddr.tqh_first) 1466 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1467 else 1468 *tl++ = create_verf; 1469 #else 1470 *tl++ = create_verf; 1471 #endif 1472 *tl = ++create_verf; 1473 } else { 1474 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1475 nfsm_v3attrbuild(vap, FALSE); 1476 } 1477 } else { 1478 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1479 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1480 sp->sa_uid = nfs_xdrneg1; 1481 sp->sa_gid = nfs_xdrneg1; 1482 sp->sa_size = 0; 1483 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1484 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1485 } 1486 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1487 if (!error) { 1488 nfsm_mtofh(dvp, newvp, v3, gotvp); 1489 if (!gotvp) { 1490 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1491 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1492 if (!error) 1493 newvp = NFSTOV(np); 1494 } 1495 } 1496 if (v3) 1497 nfsm_wcc_data(dvp, wccflag); 1498 nfsm_reqdone; 1499 if (error) { 1500 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1501 fmode &= ~O_EXCL; 1502 goto again; 1503 } 1504 if (newvp) 1505 vput(newvp); 1506 } else if (v3 && (fmode & O_EXCL)) 1507 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1508 if (!error) { 1509 if (cnp->cn_flags & MAKEENTRY) 1510 cache_enter(dvp, newvp, cnp); 1511 *ap->a_vpp = newvp; 1512 } 1513 PNBUF_PUT(cnp->cn_pnbuf); 1514 VTONFS(dvp)->n_flag |= NMODIFIED; 1515 if (!wccflag) 1516 VTONFS(dvp)->n_attrstamp = 0; 1517 vput(dvp); 1518 return (error); 1519 } 1520 1521 /* 1522 * nfs file remove call 1523 * To try and make nfs semantics closer to ufs semantics, a file that has 1524 * other processes using the vnode is renamed instead of removed and then 1525 * removed later on the last close. 1526 * - If v_usecount > 1 1527 * If a rename is not already in the works 1528 * call nfs_sillyrename() to set it up 1529 * else 1530 * do the remove rpc 1531 */ 1532 int 1533 nfs_remove(v) 1534 void *v; 1535 { 1536 struct vop_remove_args /* { 1537 struct vnodeop_desc *a_desc; 1538 struct vnode * a_dvp; 1539 struct vnode * a_vp; 1540 struct componentname * a_cnp; 1541 } */ *ap = v; 1542 struct vnode *vp = ap->a_vp; 1543 struct vnode *dvp = ap->a_dvp; 1544 struct componentname *cnp = ap->a_cnp; 1545 struct nfsnode *np = VTONFS(vp); 1546 int error = 0; 1547 struct vattr vattr; 1548 1549 #ifndef DIAGNOSTIC 1550 if ((cnp->cn_flags & HASBUF) == 0) 1551 panic("nfs_remove: no name"); 1552 if (vp->v_usecount < 1) 1553 panic("nfs_remove: bad v_usecount"); 1554 #endif 1555 if (vp->v_type == VDIR) 1556 error = EPERM; 1557 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1558 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1559 vattr.va_nlink > 1)) { 1560 /* 1561 * Purge the name cache so that the chance of a lookup for 1562 * the name succeeding while the remove is in progress is 1563 * minimized. Without node locking it can still happen, such 1564 * that an I/O op returns ESTALE, but since you get this if 1565 * another host removes the file.. 1566 */ 1567 cache_purge(vp); 1568 /* 1569 * throw away biocache buffers, mainly to avoid 1570 * unnecessary delayed writes later. 1571 */ 1572 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1573 /* Do the rpc */ 1574 if (error != EINTR) 1575 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1576 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1577 /* 1578 * Kludge City: If the first reply to the remove rpc is lost.. 1579 * the reply to the retransmitted request will be ENOENT 1580 * since the file was in fact removed 1581 * Therefore, we cheat and return success. 1582 */ 1583 if (error == ENOENT) 1584 error = 0; 1585 } else if (!np->n_sillyrename) 1586 error = nfs_sillyrename(dvp, vp, cnp); 1587 PNBUF_PUT(cnp->cn_pnbuf); 1588 np->n_attrstamp = 0; 1589 vput(dvp); 1590 vput(vp); 1591 return (error); 1592 } 1593 1594 /* 1595 * nfs file remove rpc called from nfs_inactive 1596 */ 1597 int 1598 nfs_removeit(sp) 1599 struct sillyrename *sp; 1600 { 1601 1602 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1603 (struct proc *)0)); 1604 } 1605 1606 /* 1607 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1608 */ 1609 int 1610 nfs_removerpc(dvp, name, namelen, cred, proc) 1611 struct vnode *dvp; 1612 const char *name; 1613 int namelen; 1614 struct ucred *cred; 1615 struct proc *proc; 1616 { 1617 u_int32_t *tl; 1618 caddr_t cp; 1619 int32_t t1, t2; 1620 caddr_t bpos, dpos, cp2; 1621 int error = 0, wccflag = NFSV3_WCCRATTR; 1622 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1623 const int v3 = NFS_ISV3(dvp); 1624 1625 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1626 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1627 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1628 nfsm_fhtom(dvp, v3); 1629 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1630 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1631 if (v3) 1632 nfsm_wcc_data(dvp, wccflag); 1633 nfsm_reqdone; 1634 VTONFS(dvp)->n_flag |= NMODIFIED; 1635 if (!wccflag) 1636 VTONFS(dvp)->n_attrstamp = 0; 1637 return (error); 1638 } 1639 1640 /* 1641 * nfs file rename call 1642 */ 1643 int 1644 nfs_rename(v) 1645 void *v; 1646 { 1647 struct vop_rename_args /* { 1648 struct vnode *a_fdvp; 1649 struct vnode *a_fvp; 1650 struct componentname *a_fcnp; 1651 struct vnode *a_tdvp; 1652 struct vnode *a_tvp; 1653 struct componentname *a_tcnp; 1654 } */ *ap = v; 1655 struct vnode *fvp = ap->a_fvp; 1656 struct vnode *tvp = ap->a_tvp; 1657 struct vnode *fdvp = ap->a_fdvp; 1658 struct vnode *tdvp = ap->a_tdvp; 1659 struct componentname *tcnp = ap->a_tcnp; 1660 struct componentname *fcnp = ap->a_fcnp; 1661 int error; 1662 1663 #ifndef DIAGNOSTIC 1664 if ((tcnp->cn_flags & HASBUF) == 0 || 1665 (fcnp->cn_flags & HASBUF) == 0) 1666 panic("nfs_rename: no name"); 1667 #endif 1668 /* Check for cross-device rename */ 1669 if ((fvp->v_mount != tdvp->v_mount) || 1670 (tvp && (fvp->v_mount != tvp->v_mount))) { 1671 error = EXDEV; 1672 goto out; 1673 } 1674 1675 /* 1676 * If the tvp exists and is in use, sillyrename it before doing the 1677 * rename of the new file over it. 1678 */ 1679 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1680 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1681 vput(tvp); 1682 tvp = NULL; 1683 } 1684 1685 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1686 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1687 tcnp->cn_proc); 1688 1689 if (fvp->v_type == VDIR) { 1690 if (tvp != NULL && tvp->v_type == VDIR) 1691 cache_purge(tdvp); 1692 cache_purge(fdvp); 1693 } 1694 out: 1695 if (tdvp == tvp) 1696 vrele(tdvp); 1697 else 1698 vput(tdvp); 1699 if (tvp) 1700 vput(tvp); 1701 vrele(fdvp); 1702 vrele(fvp); 1703 /* 1704 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1705 */ 1706 if (error == ENOENT) 1707 error = 0; 1708 return (error); 1709 } 1710 1711 /* 1712 * nfs file rename rpc called from nfs_remove() above 1713 */ 1714 int 1715 nfs_renameit(sdvp, scnp, sp) 1716 struct vnode *sdvp; 1717 struct componentname *scnp; 1718 struct sillyrename *sp; 1719 { 1720 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1721 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1722 } 1723 1724 /* 1725 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1726 */ 1727 int 1728 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1729 struct vnode *fdvp; 1730 const char *fnameptr; 1731 int fnamelen; 1732 struct vnode *tdvp; 1733 const char *tnameptr; 1734 int tnamelen; 1735 struct ucred *cred; 1736 struct proc *proc; 1737 { 1738 u_int32_t *tl; 1739 caddr_t cp; 1740 int32_t t1, t2; 1741 caddr_t bpos, dpos, cp2; 1742 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1743 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1744 const int v3 = NFS_ISV3(fdvp); 1745 1746 nfsstats.rpccnt[NFSPROC_RENAME]++; 1747 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1748 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1749 nfsm_rndup(tnamelen)); 1750 nfsm_fhtom(fdvp, v3); 1751 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1752 nfsm_fhtom(tdvp, v3); 1753 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1754 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1755 if (v3) { 1756 nfsm_wcc_data(fdvp, fwccflag); 1757 nfsm_wcc_data(tdvp, twccflag); 1758 } 1759 nfsm_reqdone; 1760 VTONFS(fdvp)->n_flag |= NMODIFIED; 1761 VTONFS(tdvp)->n_flag |= NMODIFIED; 1762 if (!fwccflag) 1763 VTONFS(fdvp)->n_attrstamp = 0; 1764 if (!twccflag) 1765 VTONFS(tdvp)->n_attrstamp = 0; 1766 return (error); 1767 } 1768 1769 /* 1770 * nfs hard link create call 1771 */ 1772 int 1773 nfs_link(v) 1774 void *v; 1775 { 1776 struct vop_link_args /* { 1777 struct vnode *a_dvp; 1778 struct vnode *a_vp; 1779 struct componentname *a_cnp; 1780 } */ *ap = v; 1781 struct vnode *vp = ap->a_vp; 1782 struct vnode *dvp = ap->a_dvp; 1783 struct componentname *cnp = ap->a_cnp; 1784 u_int32_t *tl; 1785 caddr_t cp; 1786 int32_t t1, t2; 1787 caddr_t bpos, dpos, cp2; 1788 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1789 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1790 /* XXX Should be const and initialised? */ 1791 int v3; 1792 1793 if (dvp->v_mount != vp->v_mount) { 1794 VOP_ABORTOP(vp, cnp); 1795 vput(dvp); 1796 return (EXDEV); 1797 } 1798 if (dvp != vp) { 1799 error = vn_lock(vp, LK_EXCLUSIVE); 1800 if (error != 0) { 1801 VOP_ABORTOP(dvp, cnp); 1802 vput(dvp); 1803 return error; 1804 } 1805 } 1806 1807 /* 1808 * Push all writes to the server, so that the attribute cache 1809 * doesn't get "out of sync" with the server. 1810 * XXX There should be a better way! 1811 */ 1812 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1813 1814 v3 = NFS_ISV3(vp); 1815 nfsstats.rpccnt[NFSPROC_LINK]++; 1816 nfsm_reqhead(vp, NFSPROC_LINK, 1817 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1818 nfsm_fhtom(vp, v3); 1819 nfsm_fhtom(dvp, v3); 1820 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1821 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1822 if (v3) { 1823 nfsm_postop_attr(vp, attrflag); 1824 nfsm_wcc_data(dvp, wccflag); 1825 } 1826 nfsm_reqdone; 1827 PNBUF_PUT(cnp->cn_pnbuf); 1828 VTONFS(dvp)->n_flag |= NMODIFIED; 1829 if (!attrflag) 1830 VTONFS(vp)->n_attrstamp = 0; 1831 if (!wccflag) 1832 VTONFS(dvp)->n_attrstamp = 0; 1833 if (dvp != vp) 1834 VOP_UNLOCK(vp, 0); 1835 vput(dvp); 1836 /* 1837 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1838 */ 1839 if (error == EEXIST) 1840 error = 0; 1841 return (error); 1842 } 1843 1844 /* 1845 * nfs symbolic link create call 1846 */ 1847 int 1848 nfs_symlink(v) 1849 void *v; 1850 { 1851 struct vop_symlink_args /* { 1852 struct vnode *a_dvp; 1853 struct vnode **a_vpp; 1854 struct componentname *a_cnp; 1855 struct vattr *a_vap; 1856 char *a_target; 1857 } */ *ap = v; 1858 struct vnode *dvp = ap->a_dvp; 1859 struct vattr *vap = ap->a_vap; 1860 struct componentname *cnp = ap->a_cnp; 1861 struct nfsv2_sattr *sp; 1862 u_int32_t *tl; 1863 caddr_t cp; 1864 int32_t t1, t2; 1865 caddr_t bpos, dpos, cp2; 1866 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1867 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1868 struct vnode *newvp = (struct vnode *)0; 1869 const int v3 = NFS_ISV3(dvp); 1870 1871 *ap->a_vpp = NULL; 1872 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1873 slen = strlen(ap->a_target); 1874 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1875 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1876 nfsm_fhtom(dvp, v3); 1877 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1878 if (v3) 1879 nfsm_v3attrbuild(vap, FALSE); 1880 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1881 if (!v3) { 1882 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1883 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1884 sp->sa_uid = nfs_xdrneg1; 1885 sp->sa_gid = nfs_xdrneg1; 1886 sp->sa_size = nfs_xdrneg1; 1887 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1888 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1889 } 1890 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1891 if (v3) { 1892 if (!error) 1893 nfsm_mtofh(dvp, newvp, v3, gotvp); 1894 nfsm_wcc_data(dvp, wccflag); 1895 } 1896 nfsm_reqdone; 1897 /* 1898 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1899 */ 1900 if (error == EEXIST) 1901 error = 0; 1902 if (error == 0 && newvp == NULL) { 1903 struct nfsnode *np = NULL; 1904 1905 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1906 cnp->cn_cred, cnp->cn_proc, &np); 1907 if (error == 0) 1908 newvp = NFSTOV(np); 1909 } 1910 if (error) { 1911 if (newvp != NULL) 1912 vput(newvp); 1913 } else { 1914 *ap->a_vpp = newvp; 1915 } 1916 PNBUF_PUT(cnp->cn_pnbuf); 1917 VTONFS(dvp)->n_flag |= NMODIFIED; 1918 if (!wccflag) 1919 VTONFS(dvp)->n_attrstamp = 0; 1920 vput(dvp); 1921 return (error); 1922 } 1923 1924 /* 1925 * nfs make dir call 1926 */ 1927 int 1928 nfs_mkdir(v) 1929 void *v; 1930 { 1931 struct vop_mkdir_args /* { 1932 struct vnode *a_dvp; 1933 struct vnode **a_vpp; 1934 struct componentname *a_cnp; 1935 struct vattr *a_vap; 1936 } */ *ap = v; 1937 struct vnode *dvp = ap->a_dvp; 1938 struct vattr *vap = ap->a_vap; 1939 struct componentname *cnp = ap->a_cnp; 1940 struct nfsv2_sattr *sp; 1941 u_int32_t *tl; 1942 caddr_t cp; 1943 int32_t t1, t2; 1944 int len; 1945 struct nfsnode *np = (struct nfsnode *)0; 1946 struct vnode *newvp = (struct vnode *)0; 1947 caddr_t bpos, dpos, cp2; 1948 int error = 0, wccflag = NFSV3_WCCRATTR; 1949 int gotvp = 0; 1950 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1951 const int v3 = NFS_ISV3(dvp); 1952 1953 len = cnp->cn_namelen; 1954 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1955 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1956 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1957 nfsm_fhtom(dvp, v3); 1958 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1959 if (v3) { 1960 nfsm_v3attrbuild(vap, FALSE); 1961 } else { 1962 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1963 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1964 sp->sa_uid = nfs_xdrneg1; 1965 sp->sa_gid = nfs_xdrneg1; 1966 sp->sa_size = nfs_xdrneg1; 1967 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1968 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1969 } 1970 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1971 if (!error) 1972 nfsm_mtofh(dvp, newvp, v3, gotvp); 1973 if (v3) 1974 nfsm_wcc_data(dvp, wccflag); 1975 nfsm_reqdone; 1976 VTONFS(dvp)->n_flag |= NMODIFIED; 1977 if (!wccflag) 1978 VTONFS(dvp)->n_attrstamp = 0; 1979 /* 1980 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1981 * if we can succeed in looking up the directory. 1982 */ 1983 if (error == EEXIST || (!error && !gotvp)) { 1984 if (newvp) { 1985 vput(newvp); 1986 newvp = (struct vnode *)0; 1987 } 1988 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1989 cnp->cn_proc, &np); 1990 if (!error) { 1991 newvp = NFSTOV(np); 1992 if (newvp->v_type != VDIR) 1993 error = EEXIST; 1994 } 1995 } 1996 if (error) { 1997 if (newvp) 1998 vput(newvp); 1999 } else { 2000 if (cnp->cn_flags & MAKEENTRY) 2001 cache_enter(dvp, newvp, cnp); 2002 *ap->a_vpp = newvp; 2003 } 2004 PNBUF_PUT(cnp->cn_pnbuf); 2005 vput(dvp); 2006 return (error); 2007 } 2008 2009 /* 2010 * nfs remove directory call 2011 */ 2012 int 2013 nfs_rmdir(v) 2014 void *v; 2015 { 2016 struct vop_rmdir_args /* { 2017 struct vnode *a_dvp; 2018 struct vnode *a_vp; 2019 struct componentname *a_cnp; 2020 } */ *ap = v; 2021 struct vnode *vp = ap->a_vp; 2022 struct vnode *dvp = ap->a_dvp; 2023 struct componentname *cnp = ap->a_cnp; 2024 u_int32_t *tl; 2025 caddr_t cp; 2026 int32_t t1, t2; 2027 caddr_t bpos, dpos, cp2; 2028 int error = 0, wccflag = NFSV3_WCCRATTR; 2029 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2030 const int v3 = NFS_ISV3(dvp); 2031 2032 if (dvp == vp) { 2033 vrele(dvp); 2034 vput(dvp); 2035 PNBUF_PUT(cnp->cn_pnbuf); 2036 return (EINVAL); 2037 } 2038 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2039 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2040 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2041 nfsm_fhtom(dvp, v3); 2042 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2043 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2044 if (v3) 2045 nfsm_wcc_data(dvp, wccflag); 2046 nfsm_reqdone; 2047 PNBUF_PUT(cnp->cn_pnbuf); 2048 VTONFS(dvp)->n_flag |= NMODIFIED; 2049 if (!wccflag) 2050 VTONFS(dvp)->n_attrstamp = 0; 2051 cache_purge(dvp); 2052 cache_purge(vp); 2053 vput(vp); 2054 vput(dvp); 2055 /* 2056 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2057 */ 2058 if (error == ENOENT) 2059 error = 0; 2060 return (error); 2061 } 2062 2063 /* 2064 * nfs readdir call 2065 */ 2066 int 2067 nfs_readdir(v) 2068 void *v; 2069 { 2070 struct vop_readdir_args /* { 2071 struct vnode *a_vp; 2072 struct uio *a_uio; 2073 struct ucred *a_cred; 2074 int *a_eofflag; 2075 off_t **a_cookies; 2076 int *a_ncookies; 2077 } */ *ap = v; 2078 struct vnode *vp = ap->a_vp; 2079 struct uio *uio = ap->a_uio; 2080 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2081 char *base = uio->uio_iov->iov_base; 2082 int tresid, error; 2083 size_t count, lost; 2084 struct dirent *dp; 2085 off_t *cookies = NULL; 2086 int ncookies = 0, nc; 2087 2088 if (vp->v_type != VDIR) 2089 return (EPERM); 2090 2091 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2092 count = uio->uio_resid - lost; 2093 if (count <= 0) 2094 return (EINVAL); 2095 2096 /* 2097 * Call nfs_bioread() to do the real work. 2098 */ 2099 tresid = uio->uio_resid = count; 2100 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2101 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2102 2103 if (!error && ap->a_cookies) { 2104 ncookies = count / 16; 2105 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2106 *ap->a_cookies = cookies; 2107 } 2108 2109 if (!error && uio->uio_resid == tresid) { 2110 uio->uio_resid += lost; 2111 nfsstats.direofcache_misses++; 2112 if (ap->a_cookies) 2113 *ap->a_ncookies = 0; 2114 *ap->a_eofflag = 1; 2115 return (0); 2116 } 2117 2118 if (!error && ap->a_cookies) { 2119 /* 2120 * Only the NFS server and emulations use cookies, and they 2121 * load the directory block into system space, so we can 2122 * just look at it directly. 2123 */ 2124 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2125 panic("nfs_readdir: lost in space"); 2126 for (nc = 0; ncookies-- && 2127 base < (char *)uio->uio_iov->iov_base; nc++){ 2128 dp = (struct dirent *) base; 2129 if (dp->d_reclen == 0) 2130 break; 2131 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2132 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2133 else 2134 *(cookies++) = NFS_GETCOOKIE(dp); 2135 base += dp->d_reclen; 2136 } 2137 uio->uio_resid += 2138 ((caddr_t)uio->uio_iov->iov_base - base); 2139 uio->uio_iov->iov_len += 2140 ((caddr_t)uio->uio_iov->iov_base - base); 2141 uio->uio_iov->iov_base = base; 2142 *ap->a_ncookies = nc; 2143 } 2144 2145 uio->uio_resid += lost; 2146 *ap->a_eofflag = 0; 2147 return (error); 2148 } 2149 2150 /* 2151 * Readdir rpc call. 2152 * Called from below the buffer cache by nfs_doio(). 2153 */ 2154 int 2155 nfs_readdirrpc(vp, uiop, cred) 2156 struct vnode *vp; 2157 struct uio *uiop; 2158 struct ucred *cred; 2159 { 2160 int len, left; 2161 struct dirent *dp = NULL; 2162 u_int32_t *tl; 2163 caddr_t cp; 2164 int32_t t1, t2; 2165 caddr_t bpos, dpos, cp2; 2166 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2167 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2168 struct nfsnode *dnp = VTONFS(vp); 2169 u_quad_t fileno; 2170 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2171 int attrflag, nrpcs = 0, reclen; 2172 const int v3 = NFS_ISV3(vp); 2173 nfsquad_t cookie; 2174 2175 #ifdef DIAGNOSTIC 2176 /* 2177 * Should be called from buffer cache, so only amount of 2178 * NFS_DIRBLKSIZ will be requested. 2179 */ 2180 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2181 panic("nfs readdirrpc bad uio"); 2182 #endif 2183 2184 /* 2185 * Loop around doing readdir rpc's of size nm_readdirsize 2186 * truncated to a multiple of NFS_DIRFRAGSIZ. 2187 * The stopping criteria is EOF or buffer full. 2188 */ 2189 while (more_dirs && bigenough) { 2190 /* 2191 * Heuristic: don't bother to do another RPC to further 2192 * fill up this block if there is not much room left. (< 50% 2193 * of the readdir RPC size). This wastes some buffer space 2194 * but can save up to 50% in RPC calls. 2195 */ 2196 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2197 bigenough = 0; 2198 break; 2199 } 2200 nfsstats.rpccnt[NFSPROC_READDIR]++; 2201 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2202 NFSX_READDIR(v3)); 2203 nfsm_fhtom(vp, v3); 2204 if (v3) { 2205 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2206 cookie.qval = uiop->uio_offset; 2207 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2208 txdr_swapcookie3(uiop->uio_offset, tl); 2209 } else { 2210 txdr_cookie3(uiop->uio_offset, tl); 2211 } 2212 tl += 2; 2213 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2214 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2215 } else { 2216 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2217 *tl++ = txdr_unsigned(uiop->uio_offset); 2218 } 2219 *tl = txdr_unsigned(nmp->nm_readdirsize); 2220 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2221 nrpcs++; 2222 if (v3) { 2223 nfsm_postop_attr(vp, attrflag); 2224 if (!error) { 2225 nfsm_dissect(tl, u_int32_t *, 2226 2 * NFSX_UNSIGNED); 2227 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2228 dnp->n_cookieverf.nfsuquad[1] = *tl; 2229 } else { 2230 m_freem(mrep); 2231 goto nfsmout; 2232 } 2233 } 2234 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2235 more_dirs = fxdr_unsigned(int, *tl); 2236 2237 /* loop thru the dir entries, doctoring them to 4bsd form */ 2238 while (more_dirs && bigenough) { 2239 if (v3) { 2240 nfsm_dissect(tl, u_int32_t *, 2241 3 * NFSX_UNSIGNED); 2242 fileno = fxdr_hyper(tl); 2243 len = fxdr_unsigned(int, *(tl + 2)); 2244 } else { 2245 nfsm_dissect(tl, u_int32_t *, 2246 2 * NFSX_UNSIGNED); 2247 fileno = fxdr_unsigned(u_quad_t, *tl++); 2248 len = fxdr_unsigned(int, *tl); 2249 } 2250 if (len <= 0 || len > NFS_MAXNAMLEN) { 2251 error = EBADRPC; 2252 m_freem(mrep); 2253 goto nfsmout; 2254 } 2255 tlen = nfsm_rndup(len); 2256 if (tlen == len) 2257 tlen += 4; /* To ensure null termination */ 2258 tlen += sizeof (off_t) + sizeof (int); 2259 reclen = ALIGN(tlen + DIRHDSIZ); 2260 tlen = reclen - DIRHDSIZ; 2261 left = NFS_DIRFRAGSIZ - blksiz; 2262 if (reclen > left) { 2263 dp->d_reclen += left; 2264 uiop->uio_iov->iov_base = 2265 (caddr_t)uiop->uio_iov->iov_base + left; 2266 uiop->uio_iov->iov_len -= left; 2267 uiop->uio_resid -= left; 2268 blksiz = 0; 2269 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2270 } 2271 if (reclen > uiop->uio_resid) 2272 bigenough = 0; 2273 if (bigenough) { 2274 dp = (struct dirent *)uiop->uio_iov->iov_base; 2275 dp->d_fileno = (int)fileno; 2276 dp->d_namlen = len; 2277 dp->d_reclen = reclen; 2278 dp->d_type = DT_UNKNOWN; 2279 blksiz += dp->d_reclen; 2280 if (blksiz == NFS_DIRFRAGSIZ) 2281 blksiz = 0; 2282 uiop->uio_resid -= DIRHDSIZ; 2283 uiop->uio_iov->iov_base = 2284 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2285 uiop->uio_iov->iov_len -= DIRHDSIZ; 2286 nfsm_mtouio(uiop, len); 2287 cp = uiop->uio_iov->iov_base; 2288 tlen -= len; 2289 *cp = '\0'; /* null terminate */ 2290 uiop->uio_iov->iov_base = 2291 (caddr_t)uiop->uio_iov->iov_base + tlen; 2292 uiop->uio_iov->iov_len -= tlen; 2293 uiop->uio_resid -= tlen; 2294 } else 2295 nfsm_adv(nfsm_rndup(len)); 2296 if (v3) { 2297 nfsm_dissect(tl, u_int32_t *, 2298 3 * NFSX_UNSIGNED); 2299 } else { 2300 nfsm_dissect(tl, u_int32_t *, 2301 2 * NFSX_UNSIGNED); 2302 } 2303 if (bigenough) { 2304 if (v3) { 2305 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2306 uiop->uio_offset = 2307 fxdr_swapcookie3(tl); 2308 else 2309 uiop->uio_offset = 2310 fxdr_cookie3(tl); 2311 } 2312 else { 2313 uiop->uio_offset = 2314 fxdr_unsigned(off_t, *tl); 2315 } 2316 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2317 } 2318 if (v3) 2319 tl += 2; 2320 else 2321 tl++; 2322 more_dirs = fxdr_unsigned(int, *tl); 2323 } 2324 /* 2325 * If at end of rpc data, get the eof boolean 2326 */ 2327 if (!more_dirs) { 2328 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2329 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2330 } 2331 m_freem(mrep); 2332 } 2333 /* 2334 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2335 * by increasing d_reclen for the last record. 2336 */ 2337 if (blksiz > 0) { 2338 left = NFS_DIRFRAGSIZ - blksiz; 2339 dp->d_reclen += left; 2340 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2341 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2342 left; 2343 uiop->uio_iov->iov_len -= left; 2344 uiop->uio_resid -= left; 2345 } 2346 2347 /* 2348 * We are now either at the end of the directory or have filled the 2349 * block. 2350 */ 2351 if (bigenough) 2352 dnp->n_direofoffset = uiop->uio_offset; 2353 nfsmout: 2354 return (error); 2355 } 2356 2357 /* 2358 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2359 */ 2360 int 2361 nfs_readdirplusrpc(vp, uiop, cred) 2362 struct vnode *vp; 2363 struct uio *uiop; 2364 struct ucred *cred; 2365 { 2366 int len, left; 2367 struct dirent *dp = NULL; 2368 u_int32_t *tl; 2369 caddr_t cp; 2370 int32_t t1, t2; 2371 struct vnode *newvp; 2372 caddr_t bpos, dpos, cp2; 2373 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2374 struct nameidata nami, *ndp = &nami; 2375 struct componentname *cnp = &ndp->ni_cnd; 2376 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2377 struct nfsnode *dnp = VTONFS(vp), *np; 2378 const unsigned char *hcp; 2379 nfsfh_t *fhp; 2380 u_quad_t fileno; 2381 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2382 int attrflag, fhsize, nrpcs = 0, reclen; 2383 struct nfs_fattr fattr, *fp; 2384 2385 #ifdef DIAGNOSTIC 2386 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2387 panic("nfs readdirplusrpc bad uio"); 2388 #endif 2389 ndp->ni_dvp = vp; 2390 newvp = NULLVP; 2391 2392 /* 2393 * Loop around doing readdir rpc's of size nm_readdirsize 2394 * truncated to a multiple of NFS_DIRFRAGSIZ. 2395 * The stopping criteria is EOF or buffer full. 2396 */ 2397 while (more_dirs && bigenough) { 2398 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2399 bigenough = 0; 2400 break; 2401 } 2402 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2403 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2404 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2405 nfsm_fhtom(vp, 1); 2406 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2407 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2408 txdr_swapcookie3(uiop->uio_offset, tl); 2409 } else { 2410 txdr_cookie3(uiop->uio_offset, tl); 2411 } 2412 tl += 2; 2413 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2414 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2415 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2416 *tl = txdr_unsigned(nmp->nm_rsize); 2417 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2418 nfsm_postop_attr(vp, attrflag); 2419 if (error) { 2420 m_freem(mrep); 2421 goto nfsmout; 2422 } 2423 nrpcs++; 2424 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2425 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2426 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2427 more_dirs = fxdr_unsigned(int, *tl); 2428 2429 /* loop thru the dir entries, doctoring them to 4bsd form */ 2430 while (more_dirs && bigenough) { 2431 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2432 fileno = fxdr_hyper(tl); 2433 len = fxdr_unsigned(int, *(tl + 2)); 2434 if (len <= 0 || len > NFS_MAXNAMLEN) { 2435 error = EBADRPC; 2436 m_freem(mrep); 2437 goto nfsmout; 2438 } 2439 tlen = nfsm_rndup(len); 2440 if (tlen == len) 2441 tlen += 4; /* To ensure null termination*/ 2442 tlen += sizeof (off_t) + sizeof (int); 2443 reclen = ALIGN(tlen + DIRHDSIZ); 2444 tlen = reclen - DIRHDSIZ; 2445 left = NFS_DIRFRAGSIZ - blksiz; 2446 if (reclen > left) { 2447 /* 2448 * DIRFRAGSIZ is aligned, no need to align 2449 * again here. 2450 */ 2451 dp->d_reclen += left; 2452 uiop->uio_iov->iov_base = 2453 (caddr_t)uiop->uio_iov->iov_base + left; 2454 uiop->uio_iov->iov_len -= left; 2455 uiop->uio_resid -= left; 2456 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2457 blksiz = 0; 2458 } 2459 if (reclen > uiop->uio_resid) 2460 bigenough = 0; 2461 if (bigenough) { 2462 dp = (struct dirent *)uiop->uio_iov->iov_base; 2463 dp->d_fileno = (int)fileno; 2464 dp->d_namlen = len; 2465 dp->d_reclen = reclen; 2466 dp->d_type = DT_UNKNOWN; 2467 blksiz += dp->d_reclen; 2468 if (blksiz == NFS_DIRFRAGSIZ) 2469 blksiz = 0; 2470 uiop->uio_resid -= DIRHDSIZ; 2471 uiop->uio_iov->iov_base = 2472 (caddr_t)uiop->uio_iov->iov_base + 2473 DIRHDSIZ; 2474 uiop->uio_iov->iov_len -= DIRHDSIZ; 2475 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2476 cnp->cn_namelen = len; 2477 nfsm_mtouio(uiop, len); 2478 cp = uiop->uio_iov->iov_base; 2479 tlen -= len; 2480 *cp = '\0'; 2481 uiop->uio_iov->iov_base = 2482 (caddr_t)uiop->uio_iov->iov_base + tlen; 2483 uiop->uio_iov->iov_len -= tlen; 2484 uiop->uio_resid -= tlen; 2485 } else 2486 nfsm_adv(nfsm_rndup(len)); 2487 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2488 if (bigenough) { 2489 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2490 uiop->uio_offset = 2491 fxdr_swapcookie3(tl); 2492 else 2493 uiop->uio_offset = 2494 fxdr_cookie3(tl); 2495 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2496 } 2497 tl += 2; 2498 2499 /* 2500 * Since the attributes are before the file handle 2501 * (sigh), we must skip over the attributes and then 2502 * come back and get them. 2503 */ 2504 attrflag = fxdr_unsigned(int, *tl); 2505 if (attrflag) { 2506 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2507 memcpy(&fattr, fp, NFSX_V3FATTR); 2508 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2509 doit = fxdr_unsigned(int, *tl); 2510 if (doit) { 2511 nfsm_getfh(fhp, fhsize, 1); 2512 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2513 VREF(vp); 2514 newvp = vp; 2515 np = dnp; 2516 } else { 2517 error = nfs_nget(vp->v_mount, fhp, 2518 fhsize, &np); 2519 if (!error) 2520 newvp = NFSTOV(np); 2521 } 2522 if (!error) { 2523 nfs_loadattrcache(&newvp, &fattr, 0); 2524 dp->d_type = 2525 IFTODT(VTTOIF(np->n_vattr->va_type)); 2526 ndp->ni_vp = newvp; 2527 cnp->cn_hash = 0; 2528 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2529 i++, hcp++) 2530 cnp->cn_hash += *hcp * i; 2531 if (cnp->cn_namelen <= NCHNAMLEN) 2532 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2533 cnp); 2534 } 2535 } 2536 } else { 2537 /* Just skip over the file handle */ 2538 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2539 i = fxdr_unsigned(int, *tl); 2540 nfsm_adv(nfsm_rndup(i)); 2541 } 2542 if (newvp != NULLVP) { 2543 vrele(newvp); 2544 if (newvp != vp) 2545 VOP_UNLOCK(vp, 0); 2546 newvp = NULLVP; 2547 } 2548 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2549 more_dirs = fxdr_unsigned(int, *tl); 2550 } 2551 /* 2552 * If at end of rpc data, get the eof boolean 2553 */ 2554 if (!more_dirs) { 2555 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2556 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2557 } 2558 m_freem(mrep); 2559 } 2560 /* 2561 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2562 * by increasing d_reclen for the last record. 2563 */ 2564 if (blksiz > 0) { 2565 left = NFS_DIRFRAGSIZ - blksiz; 2566 dp->d_reclen += left; 2567 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2568 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2569 left; 2570 uiop->uio_iov->iov_len -= left; 2571 uiop->uio_resid -= left; 2572 } 2573 2574 /* 2575 * We are now either at the end of the directory or have filled the 2576 * block. 2577 */ 2578 if (bigenough) 2579 dnp->n_direofoffset = uiop->uio_offset; 2580 nfsmout: 2581 if (newvp != NULLVP) { 2582 vrele(newvp); 2583 if (newvp != vp) 2584 VOP_UNLOCK(vp, 0); 2585 } 2586 return (error); 2587 } 2588 static char hextoasc[] = "0123456789abcdef"; 2589 2590 /* 2591 * Silly rename. To make the NFS filesystem that is stateless look a little 2592 * more like the "ufs" a remove of an active vnode is translated to a rename 2593 * to a funny looking filename that is removed by nfs_inactive on the 2594 * nfsnode. There is the potential for another process on a different client 2595 * to create the same funny name between the nfs_lookitup() fails and the 2596 * nfs_rename() completes, but... 2597 */ 2598 int 2599 nfs_sillyrename(dvp, vp, cnp) 2600 struct vnode *dvp, *vp; 2601 struct componentname *cnp; 2602 { 2603 struct sillyrename *sp; 2604 struct nfsnode *np; 2605 int error; 2606 short pid; 2607 2608 cache_purge(dvp); 2609 np = VTONFS(vp); 2610 #ifndef DIAGNOSTIC 2611 if (vp->v_type == VDIR) 2612 panic("nfs: sillyrename dir"); 2613 #endif 2614 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2615 M_NFSREQ, M_WAITOK); 2616 sp->s_cred = crdup(cnp->cn_cred); 2617 sp->s_dvp = dvp; 2618 VREF(dvp); 2619 2620 /* Fudge together a funny name */ 2621 pid = cnp->cn_proc->p_pid; 2622 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2623 sp->s_namlen = 12; 2624 sp->s_name[8] = hextoasc[pid & 0xf]; 2625 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2626 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2627 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2628 2629 /* Try lookitups until we get one that isn't there */ 2630 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2631 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2632 sp->s_name[4]++; 2633 if (sp->s_name[4] > 'z') { 2634 error = EINVAL; 2635 goto bad; 2636 } 2637 } 2638 error = nfs_renameit(dvp, cnp, sp); 2639 if (error) 2640 goto bad; 2641 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2642 cnp->cn_proc, &np); 2643 np->n_sillyrename = sp; 2644 return (0); 2645 bad: 2646 vrele(sp->s_dvp); 2647 crfree(sp->s_cred); 2648 free((caddr_t)sp, M_NFSREQ); 2649 return (error); 2650 } 2651 2652 /* 2653 * Look up a file name and optionally either update the file handle or 2654 * allocate an nfsnode, depending on the value of npp. 2655 * npp == NULL --> just do the lookup 2656 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2657 * handled too 2658 * *npp != NULL --> update the file handle in the vnode 2659 */ 2660 int 2661 nfs_lookitup(dvp, name, len, cred, procp, npp) 2662 struct vnode *dvp; 2663 const char *name; 2664 int len; 2665 struct ucred *cred; 2666 struct proc *procp; 2667 struct nfsnode **npp; 2668 { 2669 u_int32_t *tl; 2670 caddr_t cp; 2671 int32_t t1, t2; 2672 struct vnode *newvp = (struct vnode *)0; 2673 struct nfsnode *np, *dnp = VTONFS(dvp); 2674 caddr_t bpos, dpos, cp2; 2675 int error = 0, fhlen, attrflag; 2676 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2677 nfsfh_t *nfhp; 2678 const int v3 = NFS_ISV3(dvp); 2679 2680 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2681 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2682 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2683 nfsm_fhtom(dvp, v3); 2684 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2685 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2686 if (npp && !error) { 2687 nfsm_getfh(nfhp, fhlen, v3); 2688 if (*npp) { 2689 np = *npp; 2690 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2691 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2692 np->n_fhp = &np->n_fh; 2693 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2694 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2695 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2696 np->n_fhsize = fhlen; 2697 newvp = NFSTOV(np); 2698 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2699 VREF(dvp); 2700 newvp = dvp; 2701 } else { 2702 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2703 if (error) { 2704 m_freem(mrep); 2705 return (error); 2706 } 2707 newvp = NFSTOV(np); 2708 } 2709 if (v3) { 2710 nfsm_postop_attr(newvp, attrflag); 2711 if (!attrflag && *npp == NULL) { 2712 m_freem(mrep); 2713 vput(newvp); 2714 return (ENOENT); 2715 } 2716 } else 2717 nfsm_loadattr(newvp, (struct vattr *)0); 2718 } 2719 nfsm_reqdone; 2720 if (npp && *npp == NULL) { 2721 if (error) { 2722 if (newvp) 2723 vput(newvp); 2724 } else 2725 *npp = np; 2726 } 2727 return (error); 2728 } 2729 2730 /* 2731 * Nfs Version 3 commit rpc 2732 */ 2733 int 2734 nfs_commit(vp, offset, cnt, procp) 2735 struct vnode *vp; 2736 off_t offset; 2737 uint32_t cnt; 2738 struct proc *procp; 2739 { 2740 caddr_t cp; 2741 u_int32_t *tl; 2742 int32_t t1, t2; 2743 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2744 caddr_t bpos, dpos, cp2; 2745 int error = 0, wccflag = NFSV3_WCCRATTR; 2746 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2747 2748 #ifdef fvdl_debug 2749 printf("commit %lu - %lu\n", (unsigned long)offset, 2750 (unsigned long)(offset + cnt)); 2751 #endif 2752 2753 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2754 return (0); 2755 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2756 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2757 nfsm_fhtom(vp, 1); 2758 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2759 txdr_hyper(offset, tl); 2760 tl += 2; 2761 *tl = txdr_unsigned(cnt); 2762 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2763 nfsm_wcc_data(vp, wccflag); 2764 if (!error) { 2765 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2766 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2767 NFSX_V3WRITEVERF)) { 2768 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2769 NFSX_V3WRITEVERF); 2770 error = NFSERR_STALEWRITEVERF; 2771 } 2772 } 2773 nfsm_reqdone; 2774 return (error); 2775 } 2776 2777 /* 2778 * Kludge City.. 2779 * - make nfs_bmap() essentially a no-op that does no translation 2780 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2781 * (Maybe I could use the process's page mapping, but I was concerned that 2782 * Kernel Write might not be enabled and also figured copyout() would do 2783 * a lot more work than memcpy() and also it currently happens in the 2784 * context of the swapper process (2). 2785 */ 2786 int 2787 nfs_bmap(v) 2788 void *v; 2789 { 2790 struct vop_bmap_args /* { 2791 struct vnode *a_vp; 2792 daddr_t a_bn; 2793 struct vnode **a_vpp; 2794 daddr_t *a_bnp; 2795 int *a_runp; 2796 } */ *ap = v; 2797 struct vnode *vp = ap->a_vp; 2798 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2799 2800 if (ap->a_vpp != NULL) 2801 *ap->a_vpp = vp; 2802 if (ap->a_bnp != NULL) 2803 *ap->a_bnp = ap->a_bn << bshift; 2804 if (ap->a_runp != NULL) 2805 *ap->a_runp = 1024 * 1024; /* XXX */ 2806 return (0); 2807 } 2808 2809 /* 2810 * Strategy routine. 2811 * For async requests when nfsiod(s) are running, queue the request by 2812 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2813 * request. 2814 */ 2815 int 2816 nfs_strategy(v) 2817 void *v; 2818 { 2819 struct vop_strategy_args *ap = v; 2820 struct buf *bp = ap->a_bp; 2821 struct proc *p; 2822 int error = 0; 2823 2824 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2825 panic("nfs physio/async"); 2826 if (bp->b_flags & B_ASYNC) 2827 p = NULL; 2828 else 2829 p = curproc; /* XXX */ 2830 2831 /* 2832 * If the op is asynchronous and an i/o daemon is waiting 2833 * queue the request, wake it up and wait for completion 2834 * otherwise just do it ourselves. 2835 */ 2836 2837 if ((bp->b_flags & B_ASYNC) == 0 || 2838 nfs_asyncio(bp)) 2839 error = nfs_doio(bp, p); 2840 return (error); 2841 } 2842 2843 /* 2844 * fsync vnode op. Just call nfs_flush() with commit == 1. 2845 */ 2846 /* ARGSUSED */ 2847 int 2848 nfs_fsync(v) 2849 void *v; 2850 { 2851 struct vop_fsync_args /* { 2852 struct vnodeop_desc *a_desc; 2853 struct vnode * a_vp; 2854 struct ucred * a_cred; 2855 int a_flags; 2856 off_t offlo; 2857 off_t offhi; 2858 struct proc * a_p; 2859 } */ *ap = v; 2860 2861 return (nfs_flush(ap->a_vp, ap->a_cred, 2862 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2863 } 2864 2865 /* 2866 * Flush all the data associated with a vnode. 2867 */ 2868 int 2869 nfs_flush(vp, cred, waitfor, p, commit) 2870 struct vnode *vp; 2871 struct ucred *cred; 2872 int waitfor; 2873 struct proc *p; 2874 int commit; 2875 { 2876 struct uvm_object *uobj = &vp->v_uobj; 2877 struct nfsnode *np = VTONFS(vp); 2878 int error; 2879 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2880 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2881 2882 simple_lock(&uobj->vmobjlock); 2883 error = (uobj->pgops->pgo_put)(uobj, 0, 0, flushflags); 2884 if (np->n_flag & NWRITEERR) { 2885 error = np->n_error; 2886 np->n_flag &= ~NWRITEERR; 2887 } 2888 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2889 return (error); 2890 } 2891 2892 /* 2893 * Return POSIX pathconf information applicable to nfs. 2894 * 2895 * N.B. The NFS V2 protocol doesn't support this RPC. 2896 */ 2897 /* ARGSUSED */ 2898 int 2899 nfs_pathconf(v) 2900 void *v; 2901 { 2902 struct vop_pathconf_args /* { 2903 struct vnode *a_vp; 2904 int a_name; 2905 register_t *a_retval; 2906 } */ *ap = v; 2907 struct nfsv3_pathconf *pcp; 2908 struct vnode *vp = ap->a_vp; 2909 struct nfsmount *nmp; 2910 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2911 int32_t t1, t2; 2912 u_int32_t *tl; 2913 caddr_t bpos, dpos, cp, cp2; 2914 int error = 0, attrflag; 2915 unsigned int l; 2916 u_int64_t maxsize; 2917 const int v3 = NFS_ISV3(vp); 2918 2919 switch (ap->a_name) { 2920 /* Names that can be resolved locally. */ 2921 case _PC_PIPE_BUF: 2922 *ap->a_retval = PIPE_BUF; 2923 break; 2924 case _PC_SYNC_IO: 2925 *ap->a_retval = 1; 2926 break; 2927 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2928 case _PC_LINK_MAX: 2929 case _PC_NAME_MAX: 2930 case _PC_CHOWN_RESTRICTED: 2931 case _PC_NO_TRUNC: 2932 if (!v3) { 2933 error = EINVAL; 2934 break; 2935 } 2936 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2937 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2938 nfsm_fhtom(vp, 1); 2939 nfsm_request(vp, NFSPROC_PATHCONF, 2940 curproc, curproc->p_ucred); /* XXX */ 2941 nfsm_postop_attr(vp, attrflag); 2942 if (!error) { 2943 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2944 NFSX_V3PATHCONF); 2945 switch (ap->a_name) { 2946 case _PC_LINK_MAX: 2947 *ap->a_retval = 2948 fxdr_unsigned(register_t, pcp->pc_linkmax); 2949 break; 2950 case _PC_NAME_MAX: 2951 *ap->a_retval = 2952 fxdr_unsigned(register_t, pcp->pc_namemax); 2953 break; 2954 case _PC_CHOWN_RESTRICTED: 2955 *ap->a_retval = 2956 (pcp->pc_chownrestricted == nfs_true); 2957 break; 2958 case _PC_NO_TRUNC: 2959 *ap->a_retval = 2960 (pcp->pc_notrunc == nfs_true); 2961 break; 2962 } 2963 } 2964 nfsm_reqdone; 2965 break; 2966 case _PC_FILESIZEBITS: 2967 if (v3) { 2968 nmp = VFSTONFS(vp->v_mount); 2969 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2970 if ((error = nfs_fsinfo(nmp, vp, 2971 curproc->p_ucred, curproc)) != 0) /* XXX */ 2972 break; 2973 for (l = 0, maxsize = nmp->nm_maxfilesize; 2974 (maxsize >> l) > 0; l++) 2975 ; 2976 *ap->a_retval = l + 1; 2977 } else { 2978 *ap->a_retval = 32; /* NFS V2 limitation */ 2979 } 2980 break; 2981 default: 2982 error = EINVAL; 2983 break; 2984 } 2985 2986 return (error); 2987 } 2988 2989 /* 2990 * NFS advisory byte-level locks. 2991 */ 2992 int 2993 nfs_advlock(v) 2994 void *v; 2995 { 2996 struct vop_advlock_args /* { 2997 struct vnode *a_vp; 2998 caddr_t a_id; 2999 int a_op; 3000 struct flock *a_fl; 3001 int a_flags; 3002 } */ *ap = v; 3003 struct nfsnode *np = VTONFS(ap->a_vp); 3004 3005 return lf_advlock(ap, &np->n_lockf, np->n_size); 3006 } 3007 3008 /* 3009 * Print out the contents of an nfsnode. 3010 */ 3011 int 3012 nfs_print(v) 3013 void *v; 3014 { 3015 struct vop_print_args /* { 3016 struct vnode *a_vp; 3017 } */ *ap = v; 3018 struct vnode *vp = ap->a_vp; 3019 struct nfsnode *np = VTONFS(vp); 3020 3021 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3022 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3023 if (vp->v_type == VFIFO) 3024 fifo_printinfo(vp); 3025 printf("\n"); 3026 return (0); 3027 } 3028 3029 /* 3030 * NFS file truncation. 3031 */ 3032 int 3033 nfs_truncate(v) 3034 void *v; 3035 { 3036 #if 0 3037 struct vop_truncate_args /* { 3038 struct vnode *a_vp; 3039 off_t a_length; 3040 int a_flags; 3041 struct ucred *a_cred; 3042 struct proc *a_p; 3043 } */ *ap = v; 3044 #endif 3045 3046 /* Use nfs_setattr */ 3047 return (EOPNOTSUPP); 3048 } 3049 3050 /* 3051 * NFS update. 3052 */ 3053 int 3054 nfs_update(v) 3055 void *v; 3056 #if 0 3057 struct vop_update_args /* { 3058 struct vnode *a_vp; 3059 struct timespec *a_ta; 3060 struct timespec *a_tm; 3061 int a_waitfor; 3062 } */ *ap = v; 3063 #endif 3064 { 3065 3066 /* Use nfs_setattr */ 3067 return (EOPNOTSUPP); 3068 } 3069 3070 /* 3071 * Just call bwrite(). 3072 */ 3073 int 3074 nfs_bwrite(v) 3075 void *v; 3076 { 3077 struct vop_bwrite_args /* { 3078 struct vnode *a_bp; 3079 } */ *ap = v; 3080 3081 return (bwrite(ap->a_bp)); 3082 } 3083 3084 /* 3085 * nfs special file access vnode op. 3086 * Essentially just get vattr and then imitate iaccess() since the device is 3087 * local to the client. 3088 */ 3089 int 3090 nfsspec_access(v) 3091 void *v; 3092 { 3093 struct vop_access_args /* { 3094 struct vnode *a_vp; 3095 int a_mode; 3096 struct ucred *a_cred; 3097 struct proc *a_p; 3098 } */ *ap = v; 3099 struct vattr va; 3100 struct vnode *vp = ap->a_vp; 3101 int error; 3102 3103 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3104 if (error) 3105 return (error); 3106 3107 /* 3108 * Disallow write attempts on filesystems mounted read-only; 3109 * unless the file is a socket, fifo, or a block or character 3110 * device resident on the filesystem. 3111 */ 3112 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3113 switch (vp->v_type) { 3114 case VREG: 3115 case VDIR: 3116 case VLNK: 3117 return (EROFS); 3118 default: 3119 break; 3120 } 3121 } 3122 3123 return (vaccess(va.va_type, va.va_mode, 3124 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3125 } 3126 3127 /* 3128 * Read wrapper for special devices. 3129 */ 3130 int 3131 nfsspec_read(v) 3132 void *v; 3133 { 3134 struct vop_read_args /* { 3135 struct vnode *a_vp; 3136 struct uio *a_uio; 3137 int a_ioflag; 3138 struct ucred *a_cred; 3139 } */ *ap = v; 3140 struct nfsnode *np = VTONFS(ap->a_vp); 3141 3142 /* 3143 * Set access flag. 3144 */ 3145 np->n_flag |= NACC; 3146 np->n_atim.tv_sec = time.tv_sec; 3147 np->n_atim.tv_nsec = time.tv_usec * 1000; 3148 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3149 } 3150 3151 /* 3152 * Write wrapper for special devices. 3153 */ 3154 int 3155 nfsspec_write(v) 3156 void *v; 3157 { 3158 struct vop_write_args /* { 3159 struct vnode *a_vp; 3160 struct uio *a_uio; 3161 int a_ioflag; 3162 struct ucred *a_cred; 3163 } */ *ap = v; 3164 struct nfsnode *np = VTONFS(ap->a_vp); 3165 3166 /* 3167 * Set update flag. 3168 */ 3169 np->n_flag |= NUPD; 3170 np->n_mtim.tv_sec = time.tv_sec; 3171 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3172 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3173 } 3174 3175 /* 3176 * Close wrapper for special devices. 3177 * 3178 * Update the times on the nfsnode then do device close. 3179 */ 3180 int 3181 nfsspec_close(v) 3182 void *v; 3183 { 3184 struct vop_close_args /* { 3185 struct vnode *a_vp; 3186 int a_fflag; 3187 struct ucred *a_cred; 3188 struct proc *a_p; 3189 } */ *ap = v; 3190 struct vnode *vp = ap->a_vp; 3191 struct nfsnode *np = VTONFS(vp); 3192 struct vattr vattr; 3193 3194 if (np->n_flag & (NACC | NUPD)) { 3195 np->n_flag |= NCHG; 3196 if (vp->v_usecount == 1 && 3197 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3198 VATTR_NULL(&vattr); 3199 if (np->n_flag & NACC) 3200 vattr.va_atime = np->n_atim; 3201 if (np->n_flag & NUPD) 3202 vattr.va_mtime = np->n_mtim; 3203 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3204 } 3205 } 3206 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3207 } 3208 3209 /* 3210 * Read wrapper for fifos. 3211 */ 3212 int 3213 nfsfifo_read(v) 3214 void *v; 3215 { 3216 struct vop_read_args /* { 3217 struct vnode *a_vp; 3218 struct uio *a_uio; 3219 int a_ioflag; 3220 struct ucred *a_cred; 3221 } */ *ap = v; 3222 struct nfsnode *np = VTONFS(ap->a_vp); 3223 3224 /* 3225 * Set access flag. 3226 */ 3227 np->n_flag |= NACC; 3228 np->n_atim.tv_sec = time.tv_sec; 3229 np->n_atim.tv_nsec = time.tv_usec * 1000; 3230 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3231 } 3232 3233 /* 3234 * Write wrapper for fifos. 3235 */ 3236 int 3237 nfsfifo_write(v) 3238 void *v; 3239 { 3240 struct vop_write_args /* { 3241 struct vnode *a_vp; 3242 struct uio *a_uio; 3243 int a_ioflag; 3244 struct ucred *a_cred; 3245 } */ *ap = v; 3246 struct nfsnode *np = VTONFS(ap->a_vp); 3247 3248 /* 3249 * Set update flag. 3250 */ 3251 np->n_flag |= NUPD; 3252 np->n_mtim.tv_sec = time.tv_sec; 3253 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3254 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3255 } 3256 3257 /* 3258 * Close wrapper for fifos. 3259 * 3260 * Update the times on the nfsnode then do fifo close. 3261 */ 3262 int 3263 nfsfifo_close(v) 3264 void *v; 3265 { 3266 struct vop_close_args /* { 3267 struct vnode *a_vp; 3268 int a_fflag; 3269 struct ucred *a_cred; 3270 struct proc *a_p; 3271 } */ *ap = v; 3272 struct vnode *vp = ap->a_vp; 3273 struct nfsnode *np = VTONFS(vp); 3274 struct vattr vattr; 3275 3276 if (np->n_flag & (NACC | NUPD)) { 3277 if (np->n_flag & NACC) { 3278 np->n_atim.tv_sec = time.tv_sec; 3279 np->n_atim.tv_nsec = time.tv_usec * 1000; 3280 } 3281 if (np->n_flag & NUPD) { 3282 np->n_mtim.tv_sec = time.tv_sec; 3283 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3284 } 3285 np->n_flag |= NCHG; 3286 if (vp->v_usecount == 1 && 3287 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3288 VATTR_NULL(&vattr); 3289 if (np->n_flag & NACC) 3290 vattr.va_atime = np->n_atim; 3291 if (np->n_flag & NUPD) 3292 vattr.va_mtime = np->n_mtim; 3293 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3294 } 3295 } 3296 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3297 } 3298
Indexes created Wed Sep 24 05:09:52 GMT 2025