nfs_vnops.c revision 1.136
1 /* $NetBSD: nfs_vnops.c,v 1.136 2001/08/14 05:31:55 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include "opt_nfs.h" 46 #include "opt_uvmhist.h" 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/resourcevar.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/malloc.h> 57 #include <sys/mbuf.h> 58 #include <sys/namei.h> 59 #include <sys/vnode.h> 60 #include <sys/dirent.h> 61 #include <sys/fcntl.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/unistd.h> 65 66 #include <uvm/uvm_extern.h> 67 #include <uvm/uvm.h> 68 69 #include <miscfs/fifofs/fifo.h> 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsproto.h> 75 #include <nfs/nfs.h> 76 #include <nfs/nfsnode.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/xdr_subs.h> 79 #include <nfs/nfsm_subs.h> 80 #include <nfs/nqnfs.h> 81 #include <nfs/nfs_var.h> 82 83 #include <net/if.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 87 /* Defs */ 88 #define TRUE 1 89 #define FALSE 0 90 91 /* 92 * Global vfs data structures for nfs 93 */ 94 int (**nfsv2_vnodeop_p) __P((void *)); 95 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 96 { &vop_default_desc, vn_default_error }, 97 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 98 { &vop_create_desc, nfs_create }, /* create */ 99 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 100 { &vop_open_desc, nfs_open }, /* open */ 101 { &vop_close_desc, nfs_close }, /* close */ 102 { &vop_access_desc, nfs_access }, /* access */ 103 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 104 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 105 { &vop_read_desc, nfs_read }, /* read */ 106 { &vop_write_desc, nfs_write }, /* write */ 107 { &vop_lease_desc, nfs_lease_check }, /* lease */ 108 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, nfs_poll }, /* poll */ 111 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 112 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 113 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 114 { &vop_seek_desc, nfs_seek }, /* seek */ 115 { &vop_remove_desc, nfs_remove }, /* remove */ 116 { &vop_link_desc, nfs_link }, /* link */ 117 { &vop_rename_desc, nfs_rename }, /* rename */ 118 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 119 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 120 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 121 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 122 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 123 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 124 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 125 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 126 { &vop_lock_desc, nfs_lock }, /* lock */ 127 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 128 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 129 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 130 { &vop_print_desc, nfs_print }, /* print */ 131 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 132 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 133 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 134 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 135 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 136 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 137 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 138 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 139 { &vop_update_desc, nfs_update }, /* update */ 140 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 141 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 142 { &vop_putpages_desc, nfs_putpages }, /* putpages */ 143 { NULL, NULL } 144 }; 145 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 146 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 147 148 /* 149 * Special device vnode ops 150 */ 151 int (**spec_nfsv2nodeop_p) __P((void *)); 152 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 153 { &vop_default_desc, vn_default_error }, 154 { &vop_lookup_desc, spec_lookup }, /* lookup */ 155 { &vop_create_desc, spec_create }, /* create */ 156 { &vop_mknod_desc, spec_mknod }, /* mknod */ 157 { &vop_open_desc, spec_open }, /* open */ 158 { &vop_close_desc, nfsspec_close }, /* close */ 159 { &vop_access_desc, nfsspec_access }, /* access */ 160 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 161 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 162 { &vop_read_desc, nfsspec_read }, /* read */ 163 { &vop_write_desc, nfsspec_write }, /* write */ 164 { &vop_lease_desc, spec_lease_check }, /* lease */ 165 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 166 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 167 { &vop_poll_desc, spec_poll }, /* poll */ 168 { &vop_revoke_desc, spec_revoke }, /* revoke */ 169 { &vop_mmap_desc, spec_mmap }, /* mmap */ 170 { &vop_fsync_desc, spec_fsync }, /* fsync */ 171 { &vop_seek_desc, spec_seek }, /* seek */ 172 { &vop_remove_desc, spec_remove }, /* remove */ 173 { &vop_link_desc, spec_link }, /* link */ 174 { &vop_rename_desc, spec_rename }, /* rename */ 175 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 176 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 177 { &vop_symlink_desc, spec_symlink }, /* symlink */ 178 { &vop_readdir_desc, spec_readdir }, /* readdir */ 179 { &vop_readlink_desc, spec_readlink }, /* readlink */ 180 { &vop_abortop_desc, spec_abortop }, /* abortop */ 181 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 182 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 183 { &vop_lock_desc, nfs_lock }, /* lock */ 184 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 185 { &vop_bmap_desc, spec_bmap }, /* bmap */ 186 { &vop_strategy_desc, spec_strategy }, /* strategy */ 187 { &vop_print_desc, nfs_print }, /* print */ 188 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 189 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 190 { &vop_advlock_desc, spec_advlock }, /* advlock */ 191 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 192 { &vop_valloc_desc, spec_valloc }, /* valloc */ 193 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 194 { &vop_vfree_desc, spec_vfree }, /* vfree */ 195 { &vop_truncate_desc, spec_truncate }, /* truncate */ 196 { &vop_update_desc, nfs_update }, /* update */ 197 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 198 { NULL, NULL } 199 }; 200 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 201 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 202 203 int (**fifo_nfsv2nodeop_p) __P((void *)); 204 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 205 { &vop_default_desc, vn_default_error }, 206 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 207 { &vop_create_desc, fifo_create }, /* create */ 208 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 209 { &vop_open_desc, fifo_open }, /* open */ 210 { &vop_close_desc, nfsfifo_close }, /* close */ 211 { &vop_access_desc, nfsspec_access }, /* access */ 212 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 213 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 214 { &vop_read_desc, nfsfifo_read }, /* read */ 215 { &vop_write_desc, nfsfifo_write }, /* write */ 216 { &vop_lease_desc, fifo_lease_check }, /* lease */ 217 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 218 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 219 { &vop_poll_desc, fifo_poll }, /* poll */ 220 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 221 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 222 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 223 { &vop_seek_desc, fifo_seek }, /* seek */ 224 { &vop_remove_desc, fifo_remove }, /* remove */ 225 { &vop_link_desc, fifo_link }, /* link */ 226 { &vop_rename_desc, fifo_rename }, /* rename */ 227 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 228 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 229 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 230 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 231 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 232 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 233 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 234 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 235 { &vop_lock_desc, nfs_lock }, /* lock */ 236 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 237 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 238 { &vop_strategy_desc, genfs_badop }, /* strategy */ 239 { &vop_print_desc, nfs_print }, /* print */ 240 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 241 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 242 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 243 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 244 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 245 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 246 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 247 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 248 { &vop_update_desc, nfs_update }, /* update */ 249 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 250 { NULL, NULL } 251 }; 252 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 253 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 254 255 /* 256 * Global variables 257 */ 258 extern u_int32_t nfs_true, nfs_false; 259 extern u_int32_t nfs_xdrneg1; 260 extern struct nfsstats nfsstats; 261 extern nfstype nfsv3_type[9]; 262 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 263 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 264 int nfs_numasync = 0; 265 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 266 267 /* 268 * nfs null call from vfs. 269 */ 270 int 271 nfs_null(vp, cred, procp) 272 struct vnode *vp; 273 struct ucred *cred; 274 struct proc *procp; 275 { 276 caddr_t bpos, dpos; 277 int error = 0; 278 struct mbuf *mreq, *mrep, *md, *mb; 279 280 nfsm_reqhead(vp, NFSPROC_NULL, 0); 281 nfsm_request(vp, NFSPROC_NULL, procp, cred); 282 nfsm_reqdone; 283 return (error); 284 } 285 286 /* 287 * nfs access vnode op. 288 * For nfs version 2, just return ok. File accesses may fail later. 289 * For nfs version 3, use the access rpc to check accessibility. If file modes 290 * are changed on the server, accesses might still fail later. 291 */ 292 int 293 nfs_access(v) 294 void *v; 295 { 296 struct vop_access_args /* { 297 struct vnode *a_vp; 298 int a_mode; 299 struct ucred *a_cred; 300 struct proc *a_p; 301 } */ *ap = v; 302 struct vnode *vp = ap->a_vp; 303 u_int32_t *tl; 304 caddr_t cp; 305 int32_t t1, t2; 306 caddr_t bpos, dpos, cp2; 307 int error = 0, attrflag, cachevalid; 308 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 309 u_int32_t mode, rmode; 310 const int v3 = NFS_ISV3(vp); 311 struct nfsnode *np = VTONFS(vp); 312 313 cachevalid = (np->n_accstamp != -1 && 314 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 315 np->n_accuid == ap->a_cred->cr_uid); 316 317 /* 318 * Check access cache first. If this request has been made for this 319 * uid shortly before, use the cached result. 320 */ 321 if (cachevalid) { 322 if (!np->n_accerror) { 323 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 324 return np->n_accerror; 325 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 326 return np->n_accerror; 327 } 328 329 /* 330 * For nfs v3, do an access rpc, otherwise you are stuck emulating 331 * ufs_access() locally using the vattr. This may not be correct, 332 * since the server may apply other access criteria such as 333 * client uid-->server uid mapping that we do not know about, but 334 * this is better than just returning anything that is lying about 335 * in the cache. 336 */ 337 if (v3) { 338 nfsstats.rpccnt[NFSPROC_ACCESS]++; 339 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 340 nfsm_fhtom(vp, v3); 341 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 342 if (ap->a_mode & VREAD) 343 mode = NFSV3ACCESS_READ; 344 else 345 mode = 0; 346 if (vp->v_type != VDIR) { 347 if (ap->a_mode & VWRITE) 348 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 349 if (ap->a_mode & VEXEC) 350 mode |= NFSV3ACCESS_EXECUTE; 351 } else { 352 if (ap->a_mode & VWRITE) 353 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 354 NFSV3ACCESS_DELETE); 355 if (ap->a_mode & VEXEC) 356 mode |= NFSV3ACCESS_LOOKUP; 357 } 358 *tl = txdr_unsigned(mode); 359 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 360 nfsm_postop_attr(vp, attrflag); 361 if (!error) { 362 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 363 rmode = fxdr_unsigned(u_int32_t, *tl); 364 /* 365 * The NFS V3 spec does not clarify whether or not 366 * the returned access bits can be a superset of 367 * the ones requested, so... 368 */ 369 if ((rmode & mode) != mode) 370 error = EACCES; 371 } 372 nfsm_reqdone; 373 } else 374 return (nfsspec_access(ap)); 375 /* 376 * Disallow write attempts on filesystems mounted read-only; 377 * unless the file is a socket, fifo, or a block or character 378 * device resident on the filesystem. 379 */ 380 if (!error && (ap->a_mode & VWRITE) && 381 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 382 switch (vp->v_type) { 383 case VREG: 384 case VDIR: 385 case VLNK: 386 error = EROFS; 387 default: 388 break; 389 } 390 } 391 392 if (!error || error == EACCES) { 393 /* 394 * If we got the same result as for a previous, 395 * different request, OR it in. Don't update 396 * the timestamp in that case. 397 */ 398 if (cachevalid && error == np->n_accerror) { 399 if (!error) 400 np->n_accmode |= ap->a_mode; 401 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 402 np->n_accmode = ap->a_mode; 403 } else { 404 np->n_accstamp = time.tv_sec; 405 np->n_accuid = ap->a_cred->cr_uid; 406 np->n_accmode = ap->a_mode; 407 np->n_accerror = error; 408 } 409 } 410 411 return (error); 412 } 413 414 /* 415 * nfs open vnode op 416 * Check to see if the type is ok 417 * and that deletion is not in progress. 418 * For paged in text files, you will need to flush the page cache 419 * if consistency is lost. 420 */ 421 /* ARGSUSED */ 422 int 423 nfs_open(v) 424 void *v; 425 { 426 struct vop_open_args /* { 427 struct vnode *a_vp; 428 int a_mode; 429 struct ucred *a_cred; 430 struct proc *a_p; 431 } */ *ap = v; 432 struct vnode *vp = ap->a_vp; 433 struct nfsnode *np = VTONFS(vp); 434 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 435 struct vattr vattr; 436 int error; 437 438 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 439 return (EACCES); 440 } 441 442 /* 443 * Initialize read and write creds here, for swapfiles 444 * and other paths that don't set the creds themselves. 445 */ 446 447 if (ap->a_mode & FREAD) { 448 if (np->n_rcred) { 449 crfree(np->n_rcred); 450 } 451 np->n_rcred = ap->a_cred; 452 crhold(np->n_rcred); 453 } 454 if (ap->a_mode & FWRITE) { 455 if (np->n_wcred) { 456 crfree(np->n_wcred); 457 } 458 np->n_wcred = ap->a_cred; 459 crhold(np->n_wcred); 460 } 461 462 #ifndef NFS_V2_ONLY 463 /* 464 * Get a valid lease. If cached data is stale, flush it. 465 */ 466 if (nmp->nm_flag & NFSMNT_NQNFS) { 467 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 468 do { 469 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 470 ap->a_p); 471 } while (error == NQNFS_EXPIRED); 472 if (error) 473 return (error); 474 if (np->n_lrev != np->n_brev || 475 (np->n_flag & NQNFSNONCACHE)) { 476 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 477 ap->a_p, 1)) == EINTR) 478 return (error); 479 np->n_brev = np->n_lrev; 480 } 481 } 482 } else 483 #endif 484 { 485 if (np->n_flag & NMODIFIED) { 486 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 487 ap->a_p, 1)) == EINTR) 488 return (error); 489 np->n_attrstamp = 0; 490 if (vp->v_type == VDIR) { 491 nfs_invaldircache(vp, 0); 492 np->n_direofoffset = 0; 493 } 494 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 495 if (error) 496 return (error); 497 np->n_mtime = vattr.va_mtime.tv_sec; 498 } else { 499 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 500 if (error) 501 return (error); 502 if (np->n_mtime != vattr.va_mtime.tv_sec) { 503 if (vp->v_type == VDIR) { 504 nfs_invaldircache(vp, 0); 505 np->n_direofoffset = 0; 506 } 507 if ((error = nfs_vinvalbuf(vp, V_SAVE, 508 ap->a_cred, ap->a_p, 1)) == EINTR) 509 return (error); 510 np->n_mtime = vattr.va_mtime.tv_sec; 511 } 512 } 513 } 514 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 515 np->n_attrstamp = 0; /* For Open/Close consistency */ 516 return (0); 517 } 518 519 /* 520 * nfs close vnode op 521 * What an NFS client should do upon close after writing is a debatable issue. 522 * Most NFS clients push delayed writes to the server upon close, basically for 523 * two reasons: 524 * 1 - So that any write errors may be reported back to the client process 525 * doing the close system call. By far the two most likely errors are 526 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 527 * 2 - To put a worst case upper bound on cache inconsistency between 528 * multiple clients for the file. 529 * There is also a consistency problem for Version 2 of the protocol w.r.t. 530 * not being able to tell if other clients are writing a file concurrently, 531 * since there is no way of knowing if the changed modify time in the reply 532 * is only due to the write for this client. 533 * (NFS Version 3 provides weak cache consistency data in the reply that 534 * should be sufficient to detect and handle this case.) 535 * 536 * The current code does the following: 537 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 538 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 539 * or commit them (this satisfies 1 and 2 except for the 540 * case where the server crashes after this close but 541 * before the commit RPC, which is felt to be "good 542 * enough". Changing the last argument to nfs_flush() to 543 * a 1 would force a commit operation, if it is felt a 544 * commit is necessary now. 545 * for NQNFS - do nothing now, since 2 is dealt with via leases and 546 * 1 should be dealt with via an fsync() system call for 547 * cases where write errors are important. 548 */ 549 /* ARGSUSED */ 550 int 551 nfs_close(v) 552 void *v; 553 { 554 struct vop_close_args /* { 555 struct vnodeop_desc *a_desc; 556 struct vnode *a_vp; 557 int a_fflag; 558 struct ucred *a_cred; 559 struct proc *a_p; 560 } */ *ap = v; 561 struct vnode *vp = ap->a_vp; 562 struct nfsnode *np = VTONFS(vp); 563 int error = 0; 564 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 565 566 if (vp->v_type == VREG) { 567 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 568 (np->n_flag & NMODIFIED)) { 569 if (NFS_ISV3(vp)) { 570 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 571 np->n_flag &= ~NMODIFIED; 572 } else 573 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 574 np->n_attrstamp = 0; 575 } 576 if (np->n_flag & NWRITEERR) { 577 np->n_flag &= ~NWRITEERR; 578 error = np->n_error; 579 } 580 } 581 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 582 return (error); 583 } 584 585 /* 586 * nfs getattr call from vfs. 587 */ 588 int 589 nfs_getattr(v) 590 void *v; 591 { 592 struct vop_getattr_args /* { 593 struct vnode *a_vp; 594 struct vattr *a_vap; 595 struct ucred *a_cred; 596 struct proc *a_p; 597 } */ *ap = v; 598 struct vnode *vp = ap->a_vp; 599 struct nfsnode *np = VTONFS(vp); 600 caddr_t cp; 601 u_int32_t *tl; 602 int32_t t1, t2; 603 caddr_t bpos, dpos; 604 int error = 0; 605 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 606 const int v3 = NFS_ISV3(vp); 607 608 /* 609 * Update local times for special files. 610 */ 611 if (np->n_flag & (NACC | NUPD)) 612 np->n_flag |= NCHG; 613 /* 614 * First look in the cache. 615 */ 616 if (nfs_getattrcache(vp, ap->a_vap) == 0) 617 return (0); 618 nfsstats.rpccnt[NFSPROC_GETATTR]++; 619 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 620 nfsm_fhtom(vp, v3); 621 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 622 if (!error) { 623 nfsm_loadattr(vp, ap->a_vap); 624 if (vp->v_type == VDIR && 625 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 626 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 627 } 628 nfsm_reqdone; 629 return (error); 630 } 631 632 /* 633 * nfs setattr call. 634 */ 635 int 636 nfs_setattr(v) 637 void *v; 638 { 639 struct vop_setattr_args /* { 640 struct vnodeop_desc *a_desc; 641 struct vnode *a_vp; 642 struct vattr *a_vap; 643 struct ucred *a_cred; 644 struct proc *a_p; 645 } */ *ap = v; 646 struct vnode *vp = ap->a_vp; 647 struct nfsnode *np = VTONFS(vp); 648 struct vattr *vap = ap->a_vap; 649 int error = 0; 650 u_quad_t tsize = 0; 651 652 /* 653 * Setting of flags is not supported. 654 */ 655 if (vap->va_flags != VNOVAL) 656 return (EOPNOTSUPP); 657 658 /* 659 * Disallow write attempts if the filesystem is mounted read-only. 660 */ 661 if ((vap->va_uid != (uid_t)VNOVAL || 662 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 663 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 664 (vp->v_mount->mnt_flag & MNT_RDONLY)) 665 return (EROFS); 666 if (vap->va_size != VNOVAL) { 667 switch (vp->v_type) { 668 case VDIR: 669 return (EISDIR); 670 case VCHR: 671 case VBLK: 672 case VSOCK: 673 case VFIFO: 674 if (vap->va_mtime.tv_sec == VNOVAL && 675 vap->va_atime.tv_sec == VNOVAL && 676 vap->va_mode == (mode_t)VNOVAL && 677 vap->va_uid == (uid_t)VNOVAL && 678 vap->va_gid == (gid_t)VNOVAL) 679 return (0); 680 vap->va_size = VNOVAL; 681 break; 682 default: 683 /* 684 * Disallow write attempts if the filesystem is 685 * mounted read-only. 686 */ 687 if (vp->v_mount->mnt_flag & MNT_RDONLY) 688 return (EROFS); 689 uvm_vnp_setsize(vp, vap->va_size); 690 if (vap->va_size == 0) 691 error = nfs_vinvalbuf(vp, 0, 692 ap->a_cred, ap->a_p, 1); 693 else 694 error = nfs_vinvalbuf(vp, V_SAVE, 695 ap->a_cred, ap->a_p, 1); 696 if (error) { 697 uvm_vnp_setsize(vp, np->n_size); 698 return (error); 699 } 700 tsize = np->n_size; 701 np->n_size = np->n_vattr->va_size = vap->va_size; 702 } 703 } else if ((vap->va_mtime.tv_sec != VNOVAL || 704 vap->va_atime.tv_sec != VNOVAL) && 705 vp->v_type == VREG && 706 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 707 ap->a_p, 1)) == EINTR) 708 return (error); 709 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 710 if (error && vap->va_size != VNOVAL) { 711 np->n_size = np->n_vattr->va_size = tsize; 712 uvm_vnp_setsize(vp, np->n_size); 713 } 714 return (error); 715 } 716 717 /* 718 * Do an nfs setattr rpc. 719 */ 720 int 721 nfs_setattrrpc(vp, vap, cred, procp) 722 struct vnode *vp; 723 struct vattr *vap; 724 struct ucred *cred; 725 struct proc *procp; 726 { 727 struct nfsv2_sattr *sp; 728 caddr_t cp; 729 int32_t t1, t2; 730 caddr_t bpos, dpos, cp2; 731 u_int32_t *tl; 732 int error = 0, wccflag = NFSV3_WCCRATTR; 733 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 734 const int v3 = NFS_ISV3(vp); 735 736 nfsstats.rpccnt[NFSPROC_SETATTR]++; 737 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 738 nfsm_fhtom(vp, v3); 739 if (v3) { 740 nfsm_v3attrbuild(vap, TRUE); 741 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 742 *tl = nfs_false; 743 } else { 744 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 745 if (vap->va_mode == (mode_t)VNOVAL) 746 sp->sa_mode = nfs_xdrneg1; 747 else 748 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 749 if (vap->va_uid == (uid_t)VNOVAL) 750 sp->sa_uid = nfs_xdrneg1; 751 else 752 sp->sa_uid = txdr_unsigned(vap->va_uid); 753 if (vap->va_gid == (gid_t)VNOVAL) 754 sp->sa_gid = nfs_xdrneg1; 755 else 756 sp->sa_gid = txdr_unsigned(vap->va_gid); 757 sp->sa_size = txdr_unsigned(vap->va_size); 758 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 759 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 760 } 761 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 762 if (v3) { 763 nfsm_wcc_data(vp, wccflag); 764 } else 765 nfsm_loadattr(vp, (struct vattr *)0); 766 nfsm_reqdone; 767 return (error); 768 } 769 770 /* 771 * nfs lookup call, one step at a time... 772 * First look in cache 773 * If not found, unlock the directory nfsnode and do the rpc 774 * 775 * This code is full of lock/unlock statements and checks, because 776 * we continue after cache_lookup has finished (we need to check 777 * with the attr cache and do an rpc if it has timed out). This means 778 * that the locking effects of cache_lookup have to be taken into 779 * account. 780 */ 781 int 782 nfs_lookup(v) 783 void *v; 784 { 785 struct vop_lookup_args /* { 786 struct vnodeop_desc *a_desc; 787 struct vnode *a_dvp; 788 struct vnode **a_vpp; 789 struct componentname *a_cnp; 790 } */ *ap = v; 791 struct componentname *cnp = ap->a_cnp; 792 struct vnode *dvp = ap->a_dvp; 793 struct vnode **vpp = ap->a_vpp; 794 int flags; 795 struct vnode *newvp; 796 u_int32_t *tl; 797 caddr_t cp; 798 int32_t t1, t2; 799 struct nfsmount *nmp; 800 caddr_t bpos, dpos, cp2; 801 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 802 long len; 803 nfsfh_t *fhp; 804 struct nfsnode *np; 805 int lockparent, wantparent, error = 0, attrflag, fhsize; 806 const int v3 = NFS_ISV3(dvp); 807 808 cnp->cn_flags &= ~PDIRUNLOCK; 809 flags = cnp->cn_flags; 810 811 *vpp = NULLVP; 812 newvp = NULLVP; 813 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 814 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 815 return (EROFS); 816 if (dvp->v_type != VDIR) 817 return (ENOTDIR); 818 819 lockparent = flags & LOCKPARENT; 820 wantparent = flags & (LOCKPARENT|WANTPARENT); 821 nmp = VFSTONFS(dvp->v_mount); 822 np = VTONFS(dvp); 823 824 /* 825 * Before tediously performing a linear scan of the directory, 826 * check the name cache to see if the directory/name pair 827 * we are looking for is known already. 828 * If the directory/name pair is found in the name cache, 829 * we have to ensure the directory has not changed from 830 * the time the cache entry has been created. If it has, 831 * the cache entry has to be ignored 832 */ 833 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 834 struct vattr vattr; 835 int err2; 836 837 if (error && error != ENOENT) { 838 *vpp = NULLVP; 839 return error; 840 } 841 842 if (cnp->cn_flags & PDIRUNLOCK) { 843 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 844 if (err2 != 0) { 845 *vpp = NULLVP; 846 return err2; 847 } 848 cnp->cn_flags &= ~PDIRUNLOCK; 849 } 850 851 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 852 if (err2 != 0) { 853 if (error == 0) { 854 if (*vpp != dvp) 855 vput(*vpp); 856 else 857 vrele(*vpp); 858 } 859 *vpp = NULLVP; 860 return err2; 861 } 862 863 if (error == ENOENT) { 864 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 865 cnp->cn_proc) && vattr.va_mtime.tv_sec == 866 VTONFS(dvp)->n_nctime) 867 return ENOENT; 868 cache_purge(dvp); 869 np->n_nctime = 0; 870 goto dorpc; 871 } 872 873 newvp = *vpp; 874 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 875 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 876 { 877 nfsstats.lookupcache_hits++; 878 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 879 cnp->cn_flags |= SAVENAME; 880 if ((!lockparent || !(flags & ISLASTCN)) && 881 newvp != dvp) 882 VOP_UNLOCK(dvp, 0); 883 return (0); 884 } 885 cache_purge(newvp); 886 if (newvp != dvp) 887 vput(newvp); 888 else 889 vrele(newvp); 890 *vpp = NULLVP; 891 } 892 dorpc: 893 error = 0; 894 newvp = NULLVP; 895 nfsstats.lookupcache_misses++; 896 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 897 len = cnp->cn_namelen; 898 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 899 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 900 nfsm_fhtom(dvp, v3); 901 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 902 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 903 if (error) { 904 nfsm_postop_attr(dvp, attrflag); 905 m_freem(mrep); 906 goto nfsmout; 907 } 908 nfsm_getfh(fhp, fhsize, v3); 909 910 /* 911 * Handle RENAME case... 912 */ 913 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 914 if (NFS_CMPFH(np, fhp, fhsize)) { 915 m_freem(mrep); 916 return (EISDIR); 917 } 918 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 919 if (error) { 920 m_freem(mrep); 921 return error; 922 } 923 newvp = NFSTOV(np); 924 if (v3) { 925 nfsm_postop_attr(newvp, attrflag); 926 nfsm_postop_attr(dvp, attrflag); 927 } else 928 nfsm_loadattr(newvp, (struct vattr *)0); 929 *vpp = newvp; 930 m_freem(mrep); 931 cnp->cn_flags |= SAVENAME; 932 if (!lockparent) { 933 VOP_UNLOCK(dvp, 0); 934 cnp->cn_flags |= PDIRUNLOCK; 935 } 936 return (0); 937 } 938 939 /* 940 * The postop attr handling is duplicated for each if case, 941 * because it should be done while dvp is locked (unlocking 942 * dvp is different for each case). 943 */ 944 945 if (NFS_CMPFH(np, fhp, fhsize)) { 946 /* 947 * "." lookup 948 */ 949 VREF(dvp); 950 newvp = dvp; 951 if (v3) { 952 nfsm_postop_attr(newvp, attrflag); 953 nfsm_postop_attr(dvp, attrflag); 954 } else 955 nfsm_loadattr(newvp, (struct vattr *)0); 956 } else if (flags & ISDOTDOT) { 957 /* 958 * ".." lookup 959 */ 960 VOP_UNLOCK(dvp, 0); 961 cnp->cn_flags |= PDIRUNLOCK; 962 963 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 964 if (error) { 965 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 966 cnp->cn_flags &= ~PDIRUNLOCK; 967 m_freem(mrep); 968 return error; 969 } 970 newvp = NFSTOV(np); 971 972 if (v3) { 973 nfsm_postop_attr(newvp, attrflag); 974 nfsm_postop_attr(dvp, attrflag); 975 } else 976 nfsm_loadattr(newvp, (struct vattr *)0); 977 978 if (lockparent && (flags & ISLASTCN)) { 979 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 980 m_freem(mrep); 981 vput(newvp); 982 return error; 983 } 984 cnp->cn_flags &= ~PDIRUNLOCK; 985 } 986 } else { 987 /* 988 * Other lookups. 989 */ 990 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 991 if (error) { 992 m_freem(mrep); 993 return error; 994 } 995 newvp = NFSTOV(np); 996 if (v3) { 997 nfsm_postop_attr(newvp, attrflag); 998 nfsm_postop_attr(dvp, attrflag); 999 } else 1000 nfsm_loadattr(newvp, (struct vattr *)0); 1001 if (!lockparent || !(flags & ISLASTCN)) { 1002 VOP_UNLOCK(dvp, 0); 1003 cnp->cn_flags |= PDIRUNLOCK; 1004 } 1005 } 1006 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1007 cnp->cn_flags |= SAVENAME; 1008 if ((cnp->cn_flags & MAKEENTRY) && 1009 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1010 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1011 cache_enter(dvp, newvp, cnp); 1012 } 1013 *vpp = newvp; 1014 nfsm_reqdone; 1015 if (error) { 1016 /* 1017 * We get here only because of errors returned by 1018 * the RPC. Otherwise we'll have returned above 1019 * (the nfsm_* macros will jump to nfsm_reqdone 1020 * on error). 1021 */ 1022 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1023 cnp->cn_nameiop != CREATE) { 1024 if (VTONFS(dvp)->n_nctime == 0) 1025 VTONFS(dvp)->n_nctime = 1026 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1027 cache_enter(dvp, NULL, cnp); 1028 } 1029 if (newvp != NULLVP) { 1030 vrele(newvp); 1031 if (newvp != dvp) 1032 VOP_UNLOCK(newvp, 0); 1033 } 1034 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1035 (flags & ISLASTCN) && error == ENOENT) { 1036 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1037 error = EROFS; 1038 else 1039 error = EJUSTRETURN; 1040 } 1041 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1042 cnp->cn_flags |= SAVENAME; 1043 *vpp = NULL; 1044 } 1045 1046 return error; 1047 } 1048 1049 /* 1050 * nfs read call. 1051 * Just call nfs_bioread() to do the work. 1052 */ 1053 int 1054 nfs_read(v) 1055 void *v; 1056 { 1057 struct vop_read_args /* { 1058 struct vnode *a_vp; 1059 struct uio *a_uio; 1060 int a_ioflag; 1061 struct ucred *a_cred; 1062 } */ *ap = v; 1063 struct vnode *vp = ap->a_vp; 1064 1065 if (vp->v_type != VREG) 1066 return (EPERM); 1067 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1068 } 1069 1070 /* 1071 * nfs readlink call 1072 */ 1073 int 1074 nfs_readlink(v) 1075 void *v; 1076 { 1077 struct vop_readlink_args /* { 1078 struct vnode *a_vp; 1079 struct uio *a_uio; 1080 struct ucred *a_cred; 1081 } */ *ap = v; 1082 struct vnode *vp = ap->a_vp; 1083 1084 if (vp->v_type != VLNK) 1085 return (EPERM); 1086 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1087 } 1088 1089 /* 1090 * Do a readlink rpc. 1091 * Called by nfs_doio() from below the buffer cache. 1092 */ 1093 int 1094 nfs_readlinkrpc(vp, uiop, cred) 1095 struct vnode *vp; 1096 struct uio *uiop; 1097 struct ucred *cred; 1098 { 1099 u_int32_t *tl; 1100 caddr_t cp; 1101 int32_t t1, t2; 1102 caddr_t bpos, dpos, cp2; 1103 int error = 0, len, attrflag; 1104 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1105 const int v3 = NFS_ISV3(vp); 1106 1107 nfsstats.rpccnt[NFSPROC_READLINK]++; 1108 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1109 nfsm_fhtom(vp, v3); 1110 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1111 if (v3) 1112 nfsm_postop_attr(vp, attrflag); 1113 if (!error) { 1114 nfsm_strsiz(len, NFS_MAXPATHLEN); 1115 nfsm_mtouio(uiop, len); 1116 } 1117 nfsm_reqdone; 1118 return (error); 1119 } 1120 1121 /* 1122 * nfs read rpc call 1123 * Ditto above 1124 */ 1125 int 1126 nfs_readrpc(vp, uiop) 1127 struct vnode *vp; 1128 struct uio *uiop; 1129 { 1130 u_int32_t *tl; 1131 caddr_t cp; 1132 int32_t t1, t2; 1133 caddr_t bpos, dpos, cp2; 1134 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1135 struct nfsmount *nmp; 1136 int error = 0, len, retlen, tsiz, eof, attrflag; 1137 const int v3 = NFS_ISV3(vp); 1138 1139 #ifndef nolint 1140 eof = 0; 1141 #endif 1142 nmp = VFSTONFS(vp->v_mount); 1143 tsiz = uiop->uio_resid; 1144 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1145 return (EFBIG); 1146 while (tsiz > 0) { 1147 nfsstats.rpccnt[NFSPROC_READ]++; 1148 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1149 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1150 nfsm_fhtom(vp, v3); 1151 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1152 if (v3) { 1153 txdr_hyper(uiop->uio_offset, tl); 1154 *(tl + 2) = txdr_unsigned(len); 1155 } else { 1156 *tl++ = txdr_unsigned(uiop->uio_offset); 1157 *tl++ = txdr_unsigned(len); 1158 *tl = 0; 1159 } 1160 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1161 VTONFS(vp)->n_rcred); 1162 if (v3) { 1163 nfsm_postop_attr(vp, attrflag); 1164 if (error) { 1165 m_freem(mrep); 1166 goto nfsmout; 1167 } 1168 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1169 eof = fxdr_unsigned(int, *(tl + 1)); 1170 } else 1171 nfsm_loadattr(vp, (struct vattr *)0); 1172 nfsm_strsiz(retlen, nmp->nm_rsize); 1173 nfsm_mtouio(uiop, retlen); 1174 m_freem(mrep); 1175 tsiz -= retlen; 1176 if (v3) { 1177 if (eof || retlen == 0) 1178 tsiz = 0; 1179 } else if (retlen < len) 1180 tsiz = 0; 1181 } 1182 nfsmout: 1183 return (error); 1184 } 1185 1186 /* 1187 * nfs write call 1188 */ 1189 int 1190 nfs_writerpc(vp, uiop, iomode, must_commit) 1191 struct vnode *vp; 1192 struct uio *uiop; 1193 int *iomode, *must_commit; 1194 { 1195 u_int32_t *tl; 1196 caddr_t cp; 1197 int32_t t1, t2, backup; 1198 caddr_t bpos, dpos, cp2; 1199 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1200 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1201 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1202 const int v3 = NFS_ISV3(vp); 1203 int committed = NFSV3WRITE_FILESYNC; 1204 1205 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1206 panic("writerpc readonly vp %p", vp); 1207 } 1208 1209 #ifndef DIAGNOSTIC 1210 if (uiop->uio_iovcnt != 1) 1211 panic("nfs: writerpc iovcnt > 1"); 1212 #endif 1213 *must_commit = 0; 1214 tsiz = uiop->uio_resid; 1215 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1216 return (EFBIG); 1217 while (tsiz > 0) { 1218 nfsstats.rpccnt[NFSPROC_WRITE]++; 1219 len = min(tsiz, nmp->nm_wsize); 1220 nfsm_reqhead(vp, NFSPROC_WRITE, 1221 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1222 nfsm_fhtom(vp, v3); 1223 if (v3) { 1224 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1225 txdr_hyper(uiop->uio_offset, tl); 1226 tl += 2; 1227 *tl++ = txdr_unsigned(len); 1228 *tl++ = txdr_unsigned(*iomode); 1229 *tl = txdr_unsigned(len); 1230 } else { 1231 u_int32_t x; 1232 1233 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1234 /* Set both "begin" and "current" to non-garbage. */ 1235 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1236 *tl++ = x; /* "begin offset" */ 1237 *tl++ = x; /* "current offset" */ 1238 x = txdr_unsigned(len); 1239 *tl++ = x; /* total to this offset */ 1240 *tl = x; /* size of this write */ 1241 1242 } 1243 nfsm_uiotom(uiop, len); 1244 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1245 VTONFS(vp)->n_wcred); 1246 if (v3) { 1247 wccflag = NFSV3_WCCCHK; 1248 nfsm_wcc_data(vp, wccflag); 1249 if (!error) { 1250 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1251 + NFSX_V3WRITEVERF); 1252 rlen = fxdr_unsigned(int, *tl++); 1253 if (rlen == 0) { 1254 error = NFSERR_IO; 1255 m_freem(mrep); 1256 break; 1257 } else if (rlen < len) { 1258 backup = len - rlen; 1259 uiop->uio_iov->iov_base = 1260 (caddr_t)uiop->uio_iov->iov_base - 1261 backup; 1262 uiop->uio_iov->iov_len += backup; 1263 uiop->uio_offset -= backup; 1264 uiop->uio_resid += backup; 1265 len = rlen; 1266 } 1267 commit = fxdr_unsigned(int, *tl++); 1268 1269 /* 1270 * Return the lowest committment level 1271 * obtained by any of the RPCs. 1272 */ 1273 if (committed == NFSV3WRITE_FILESYNC) 1274 committed = commit; 1275 else if (committed == NFSV3WRITE_DATASYNC && 1276 commit == NFSV3WRITE_UNSTABLE) 1277 committed = commit; 1278 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1279 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1280 NFSX_V3WRITEVERF); 1281 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1282 } else if (memcmp((caddr_t)tl, 1283 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1284 *must_commit = 1; 1285 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1286 NFSX_V3WRITEVERF); 1287 } 1288 } 1289 } else 1290 nfsm_loadattr(vp, (struct vattr *)0); 1291 if (wccflag) 1292 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1293 m_freem(mrep); 1294 if (error) 1295 break; 1296 tsiz -= len; 1297 } 1298 nfsmout: 1299 *iomode = committed; 1300 if (error) 1301 uiop->uio_resid = tsiz; 1302 return (error); 1303 } 1304 1305 /* 1306 * nfs mknod rpc 1307 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1308 * mode set to specify the file type and the size field for rdev. 1309 */ 1310 int 1311 nfs_mknodrpc(dvp, vpp, cnp, vap) 1312 struct vnode *dvp; 1313 struct vnode **vpp; 1314 struct componentname *cnp; 1315 struct vattr *vap; 1316 { 1317 struct nfsv2_sattr *sp; 1318 u_int32_t *tl; 1319 caddr_t cp; 1320 int32_t t1, t2; 1321 struct vnode *newvp = (struct vnode *)0; 1322 struct nfsnode *np; 1323 char *cp2; 1324 caddr_t bpos, dpos; 1325 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1326 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1327 u_int32_t rdev; 1328 const int v3 = NFS_ISV3(dvp); 1329 1330 if (vap->va_type == VCHR || vap->va_type == VBLK) 1331 rdev = txdr_unsigned(vap->va_rdev); 1332 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1333 rdev = nfs_xdrneg1; 1334 else { 1335 VOP_ABORTOP(dvp, cnp); 1336 vput(dvp); 1337 return (EOPNOTSUPP); 1338 } 1339 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1340 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1341 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1342 nfsm_fhtom(dvp, v3); 1343 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1344 if (v3) { 1345 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1346 *tl++ = vtonfsv3_type(vap->va_type); 1347 nfsm_v3attrbuild(vap, FALSE); 1348 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1349 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1350 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1351 *tl = txdr_unsigned(minor(vap->va_rdev)); 1352 } 1353 } else { 1354 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1355 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1356 sp->sa_uid = nfs_xdrneg1; 1357 sp->sa_gid = nfs_xdrneg1; 1358 sp->sa_size = rdev; 1359 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1360 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1361 } 1362 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1363 if (!error) { 1364 nfsm_mtofh(dvp, newvp, v3, gotvp); 1365 if (!gotvp) { 1366 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1367 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1368 if (!error) 1369 newvp = NFSTOV(np); 1370 } 1371 } 1372 if (v3) 1373 nfsm_wcc_data(dvp, wccflag); 1374 nfsm_reqdone; 1375 if (error) { 1376 if (newvp) 1377 vput(newvp); 1378 } else { 1379 if (cnp->cn_flags & MAKEENTRY) 1380 cache_enter(dvp, newvp, cnp); 1381 *vpp = newvp; 1382 } 1383 PNBUF_PUT(cnp->cn_pnbuf); 1384 VTONFS(dvp)->n_flag |= NMODIFIED; 1385 if (!wccflag) 1386 VTONFS(dvp)->n_attrstamp = 0; 1387 vput(dvp); 1388 return (error); 1389 } 1390 1391 /* 1392 * nfs mknod vop 1393 * just call nfs_mknodrpc() to do the work. 1394 */ 1395 /* ARGSUSED */ 1396 int 1397 nfs_mknod(v) 1398 void *v; 1399 { 1400 struct vop_mknod_args /* { 1401 struct vnode *a_dvp; 1402 struct vnode **a_vpp; 1403 struct componentname *a_cnp; 1404 struct vattr *a_vap; 1405 } */ *ap = v; 1406 int error; 1407 1408 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1409 return (error); 1410 } 1411 1412 static u_long create_verf; 1413 /* 1414 * nfs file create call 1415 */ 1416 int 1417 nfs_create(v) 1418 void *v; 1419 { 1420 struct vop_create_args /* { 1421 struct vnode *a_dvp; 1422 struct vnode **a_vpp; 1423 struct componentname *a_cnp; 1424 struct vattr *a_vap; 1425 } */ *ap = v; 1426 struct vnode *dvp = ap->a_dvp; 1427 struct vattr *vap = ap->a_vap; 1428 struct componentname *cnp = ap->a_cnp; 1429 struct nfsv2_sattr *sp; 1430 u_int32_t *tl; 1431 caddr_t cp; 1432 int32_t t1, t2; 1433 struct nfsnode *np = (struct nfsnode *)0; 1434 struct vnode *newvp = (struct vnode *)0; 1435 caddr_t bpos, dpos, cp2; 1436 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1437 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1438 const int v3 = NFS_ISV3(dvp); 1439 1440 /* 1441 * Oops, not for me.. 1442 */ 1443 if (vap->va_type == VSOCK) 1444 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1445 1446 #ifdef VA_EXCLUSIVE 1447 if (vap->va_vaflags & VA_EXCLUSIVE) 1448 fmode |= O_EXCL; 1449 #endif 1450 again: 1451 error = 0; 1452 nfsstats.rpccnt[NFSPROC_CREATE]++; 1453 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1454 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1455 nfsm_fhtom(dvp, v3); 1456 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1457 if (v3) { 1458 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1459 if (fmode & O_EXCL) { 1460 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1461 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1462 #ifdef INET 1463 if (in_ifaddr.tqh_first) 1464 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1465 else 1466 *tl++ = create_verf; 1467 #else 1468 *tl++ = create_verf; 1469 #endif 1470 *tl = ++create_verf; 1471 } else { 1472 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1473 nfsm_v3attrbuild(vap, FALSE); 1474 } 1475 } else { 1476 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1477 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1478 sp->sa_uid = nfs_xdrneg1; 1479 sp->sa_gid = nfs_xdrneg1; 1480 sp->sa_size = 0; 1481 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1482 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1483 } 1484 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1485 if (!error) { 1486 nfsm_mtofh(dvp, newvp, v3, gotvp); 1487 if (!gotvp) { 1488 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1489 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1490 if (!error) 1491 newvp = NFSTOV(np); 1492 } 1493 } 1494 if (v3) 1495 nfsm_wcc_data(dvp, wccflag); 1496 nfsm_reqdone; 1497 if (error) { 1498 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1499 fmode &= ~O_EXCL; 1500 goto again; 1501 } 1502 if (newvp) 1503 vput(newvp); 1504 } else if (v3 && (fmode & O_EXCL)) 1505 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1506 if (!error) { 1507 if (cnp->cn_flags & MAKEENTRY) 1508 cache_enter(dvp, newvp, cnp); 1509 *ap->a_vpp = newvp; 1510 } 1511 PNBUF_PUT(cnp->cn_pnbuf); 1512 VTONFS(dvp)->n_flag |= NMODIFIED; 1513 if (!wccflag) 1514 VTONFS(dvp)->n_attrstamp = 0; 1515 vput(dvp); 1516 return (error); 1517 } 1518 1519 /* 1520 * nfs file remove call 1521 * To try and make nfs semantics closer to ufs semantics, a file that has 1522 * other processes using the vnode is renamed instead of removed and then 1523 * removed later on the last close. 1524 * - If v_usecount > 1 1525 * If a rename is not already in the works 1526 * call nfs_sillyrename() to set it up 1527 * else 1528 * do the remove rpc 1529 */ 1530 int 1531 nfs_remove(v) 1532 void *v; 1533 { 1534 struct vop_remove_args /* { 1535 struct vnodeop_desc *a_desc; 1536 struct vnode * a_dvp; 1537 struct vnode * a_vp; 1538 struct componentname * a_cnp; 1539 } */ *ap = v; 1540 struct vnode *vp = ap->a_vp; 1541 struct vnode *dvp = ap->a_dvp; 1542 struct componentname *cnp = ap->a_cnp; 1543 struct nfsnode *np = VTONFS(vp); 1544 int error = 0; 1545 struct vattr vattr; 1546 1547 #ifndef DIAGNOSTIC 1548 if ((cnp->cn_flags & HASBUF) == 0) 1549 panic("nfs_remove: no name"); 1550 if (vp->v_usecount < 1) 1551 panic("nfs_remove: bad v_usecount"); 1552 #endif 1553 if (vp->v_type == VDIR) 1554 error = EPERM; 1555 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1556 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1557 vattr.va_nlink > 1)) { 1558 /* 1559 * Purge the name cache so that the chance of a lookup for 1560 * the name succeeding while the remove is in progress is 1561 * minimized. Without node locking it can still happen, such 1562 * that an I/O op returns ESTALE, but since you get this if 1563 * another host removes the file.. 1564 */ 1565 cache_purge(vp); 1566 /* 1567 * throw away biocache buffers, mainly to avoid 1568 * unnecessary delayed writes later. 1569 */ 1570 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1571 /* Do the rpc */ 1572 if (error != EINTR) 1573 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1574 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1575 /* 1576 * Kludge City: If the first reply to the remove rpc is lost.. 1577 * the reply to the retransmitted request will be ENOENT 1578 * since the file was in fact removed 1579 * Therefore, we cheat and return success. 1580 */ 1581 if (error == ENOENT) 1582 error = 0; 1583 } else if (!np->n_sillyrename) 1584 error = nfs_sillyrename(dvp, vp, cnp); 1585 PNBUF_PUT(cnp->cn_pnbuf); 1586 np->n_attrstamp = 0; 1587 vput(dvp); 1588 vput(vp); 1589 return (error); 1590 } 1591 1592 /* 1593 * nfs file remove rpc called from nfs_inactive 1594 */ 1595 int 1596 nfs_removeit(sp) 1597 struct sillyrename *sp; 1598 { 1599 1600 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1601 (struct proc *)0)); 1602 } 1603 1604 /* 1605 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1606 */ 1607 int 1608 nfs_removerpc(dvp, name, namelen, cred, proc) 1609 struct vnode *dvp; 1610 const char *name; 1611 int namelen; 1612 struct ucred *cred; 1613 struct proc *proc; 1614 { 1615 u_int32_t *tl; 1616 caddr_t cp; 1617 int32_t t1, t2; 1618 caddr_t bpos, dpos, cp2; 1619 int error = 0, wccflag = NFSV3_WCCRATTR; 1620 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1621 const int v3 = NFS_ISV3(dvp); 1622 1623 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1624 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1625 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1626 nfsm_fhtom(dvp, v3); 1627 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1628 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1629 if (v3) 1630 nfsm_wcc_data(dvp, wccflag); 1631 nfsm_reqdone; 1632 VTONFS(dvp)->n_flag |= NMODIFIED; 1633 if (!wccflag) 1634 VTONFS(dvp)->n_attrstamp = 0; 1635 return (error); 1636 } 1637 1638 /* 1639 * nfs file rename call 1640 */ 1641 int 1642 nfs_rename(v) 1643 void *v; 1644 { 1645 struct vop_rename_args /* { 1646 struct vnode *a_fdvp; 1647 struct vnode *a_fvp; 1648 struct componentname *a_fcnp; 1649 struct vnode *a_tdvp; 1650 struct vnode *a_tvp; 1651 struct componentname *a_tcnp; 1652 } */ *ap = v; 1653 struct vnode *fvp = ap->a_fvp; 1654 struct vnode *tvp = ap->a_tvp; 1655 struct vnode *fdvp = ap->a_fdvp; 1656 struct vnode *tdvp = ap->a_tdvp; 1657 struct componentname *tcnp = ap->a_tcnp; 1658 struct componentname *fcnp = ap->a_fcnp; 1659 int error; 1660 1661 #ifndef DIAGNOSTIC 1662 if ((tcnp->cn_flags & HASBUF) == 0 || 1663 (fcnp->cn_flags & HASBUF) == 0) 1664 panic("nfs_rename: no name"); 1665 #endif 1666 /* Check for cross-device rename */ 1667 if ((fvp->v_mount != tdvp->v_mount) || 1668 (tvp && (fvp->v_mount != tvp->v_mount))) { 1669 error = EXDEV; 1670 goto out; 1671 } 1672 1673 /* 1674 * If the tvp exists and is in use, sillyrename it before doing the 1675 * rename of the new file over it. 1676 */ 1677 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1678 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1679 vput(tvp); 1680 tvp = NULL; 1681 } 1682 1683 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1684 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1685 tcnp->cn_proc); 1686 1687 if (fvp->v_type == VDIR) { 1688 if (tvp != NULL && tvp->v_type == VDIR) 1689 cache_purge(tdvp); 1690 cache_purge(fdvp); 1691 } 1692 out: 1693 if (tdvp == tvp) 1694 vrele(tdvp); 1695 else 1696 vput(tdvp); 1697 if (tvp) 1698 vput(tvp); 1699 vrele(fdvp); 1700 vrele(fvp); 1701 /* 1702 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1703 */ 1704 if (error == ENOENT) 1705 error = 0; 1706 return (error); 1707 } 1708 1709 /* 1710 * nfs file rename rpc called from nfs_remove() above 1711 */ 1712 int 1713 nfs_renameit(sdvp, scnp, sp) 1714 struct vnode *sdvp; 1715 struct componentname *scnp; 1716 struct sillyrename *sp; 1717 { 1718 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1719 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1720 } 1721 1722 /* 1723 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1724 */ 1725 int 1726 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1727 struct vnode *fdvp; 1728 const char *fnameptr; 1729 int fnamelen; 1730 struct vnode *tdvp; 1731 const char *tnameptr; 1732 int tnamelen; 1733 struct ucred *cred; 1734 struct proc *proc; 1735 { 1736 u_int32_t *tl; 1737 caddr_t cp; 1738 int32_t t1, t2; 1739 caddr_t bpos, dpos, cp2; 1740 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1741 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1742 const int v3 = NFS_ISV3(fdvp); 1743 1744 nfsstats.rpccnt[NFSPROC_RENAME]++; 1745 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1746 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1747 nfsm_rndup(tnamelen)); 1748 nfsm_fhtom(fdvp, v3); 1749 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1750 nfsm_fhtom(tdvp, v3); 1751 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1752 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1753 if (v3) { 1754 nfsm_wcc_data(fdvp, fwccflag); 1755 nfsm_wcc_data(tdvp, twccflag); 1756 } 1757 nfsm_reqdone; 1758 VTONFS(fdvp)->n_flag |= NMODIFIED; 1759 VTONFS(tdvp)->n_flag |= NMODIFIED; 1760 if (!fwccflag) 1761 VTONFS(fdvp)->n_attrstamp = 0; 1762 if (!twccflag) 1763 VTONFS(tdvp)->n_attrstamp = 0; 1764 return (error); 1765 } 1766 1767 /* 1768 * nfs hard link create call 1769 */ 1770 int 1771 nfs_link(v) 1772 void *v; 1773 { 1774 struct vop_link_args /* { 1775 struct vnode *a_dvp; 1776 struct vnode *a_vp; 1777 struct componentname *a_cnp; 1778 } */ *ap = v; 1779 struct vnode *vp = ap->a_vp; 1780 struct vnode *dvp = ap->a_dvp; 1781 struct componentname *cnp = ap->a_cnp; 1782 u_int32_t *tl; 1783 caddr_t cp; 1784 int32_t t1, t2; 1785 caddr_t bpos, dpos, cp2; 1786 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1787 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1788 /* XXX Should be const and initialised? */ 1789 int v3; 1790 1791 if (dvp->v_mount != vp->v_mount) { 1792 VOP_ABORTOP(vp, cnp); 1793 vput(dvp); 1794 return (EXDEV); 1795 } 1796 if (dvp != vp) { 1797 error = vn_lock(vp, LK_EXCLUSIVE); 1798 if (error != 0) { 1799 VOP_ABORTOP(dvp, cnp); 1800 vput(dvp); 1801 return error; 1802 } 1803 } 1804 1805 /* 1806 * Push all writes to the server, so that the attribute cache 1807 * doesn't get "out of sync" with the server. 1808 * XXX There should be a better way! 1809 */ 1810 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1811 1812 v3 = NFS_ISV3(vp); 1813 nfsstats.rpccnt[NFSPROC_LINK]++; 1814 nfsm_reqhead(vp, NFSPROC_LINK, 1815 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1816 nfsm_fhtom(vp, v3); 1817 nfsm_fhtom(dvp, v3); 1818 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1819 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1820 if (v3) { 1821 nfsm_postop_attr(vp, attrflag); 1822 nfsm_wcc_data(dvp, wccflag); 1823 } 1824 nfsm_reqdone; 1825 PNBUF_PUT(cnp->cn_pnbuf); 1826 VTONFS(dvp)->n_flag |= NMODIFIED; 1827 if (!attrflag) 1828 VTONFS(vp)->n_attrstamp = 0; 1829 if (!wccflag) 1830 VTONFS(dvp)->n_attrstamp = 0; 1831 if (dvp != vp) 1832 VOP_UNLOCK(vp, 0); 1833 vput(dvp); 1834 /* 1835 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1836 */ 1837 if (error == EEXIST) 1838 error = 0; 1839 return (error); 1840 } 1841 1842 /* 1843 * nfs symbolic link create call 1844 */ 1845 int 1846 nfs_symlink(v) 1847 void *v; 1848 { 1849 struct vop_symlink_args /* { 1850 struct vnode *a_dvp; 1851 struct vnode **a_vpp; 1852 struct componentname *a_cnp; 1853 struct vattr *a_vap; 1854 char *a_target; 1855 } */ *ap = v; 1856 struct vnode *dvp = ap->a_dvp; 1857 struct vattr *vap = ap->a_vap; 1858 struct componentname *cnp = ap->a_cnp; 1859 struct nfsv2_sattr *sp; 1860 u_int32_t *tl; 1861 caddr_t cp; 1862 int32_t t1, t2; 1863 caddr_t bpos, dpos, cp2; 1864 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1865 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1866 struct vnode *newvp = (struct vnode *)0; 1867 const int v3 = NFS_ISV3(dvp); 1868 1869 *ap->a_vpp = NULL; 1870 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1871 slen = strlen(ap->a_target); 1872 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1873 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1874 nfsm_fhtom(dvp, v3); 1875 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1876 if (v3) 1877 nfsm_v3attrbuild(vap, FALSE); 1878 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1879 if (!v3) { 1880 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1881 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1882 sp->sa_uid = nfs_xdrneg1; 1883 sp->sa_gid = nfs_xdrneg1; 1884 sp->sa_size = nfs_xdrneg1; 1885 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1886 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1887 } 1888 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1889 if (v3) { 1890 if (!error) 1891 nfsm_mtofh(dvp, newvp, v3, gotvp); 1892 nfsm_wcc_data(dvp, wccflag); 1893 } 1894 nfsm_reqdone; 1895 /* 1896 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1897 */ 1898 if (error == EEXIST) 1899 error = 0; 1900 if (error == 0 && newvp == NULL) { 1901 struct nfsnode *np = NULL; 1902 1903 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1904 cnp->cn_cred, cnp->cn_proc, &np); 1905 if (error == 0) 1906 newvp = NFSTOV(np); 1907 } 1908 if (error) { 1909 if (newvp != NULL) 1910 vput(newvp); 1911 } else { 1912 *ap->a_vpp = newvp; 1913 } 1914 PNBUF_PUT(cnp->cn_pnbuf); 1915 VTONFS(dvp)->n_flag |= NMODIFIED; 1916 if (!wccflag) 1917 VTONFS(dvp)->n_attrstamp = 0; 1918 vput(dvp); 1919 return (error); 1920 } 1921 1922 /* 1923 * nfs make dir call 1924 */ 1925 int 1926 nfs_mkdir(v) 1927 void *v; 1928 { 1929 struct vop_mkdir_args /* { 1930 struct vnode *a_dvp; 1931 struct vnode **a_vpp; 1932 struct componentname *a_cnp; 1933 struct vattr *a_vap; 1934 } */ *ap = v; 1935 struct vnode *dvp = ap->a_dvp; 1936 struct vattr *vap = ap->a_vap; 1937 struct componentname *cnp = ap->a_cnp; 1938 struct nfsv2_sattr *sp; 1939 u_int32_t *tl; 1940 caddr_t cp; 1941 int32_t t1, t2; 1942 int len; 1943 struct nfsnode *np = (struct nfsnode *)0; 1944 struct vnode *newvp = (struct vnode *)0; 1945 caddr_t bpos, dpos, cp2; 1946 int error = 0, wccflag = NFSV3_WCCRATTR; 1947 int gotvp = 0; 1948 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1949 const int v3 = NFS_ISV3(dvp); 1950 1951 len = cnp->cn_namelen; 1952 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1953 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1954 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1955 nfsm_fhtom(dvp, v3); 1956 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1957 if (v3) { 1958 nfsm_v3attrbuild(vap, FALSE); 1959 } else { 1960 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1961 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1962 sp->sa_uid = nfs_xdrneg1; 1963 sp->sa_gid = nfs_xdrneg1; 1964 sp->sa_size = nfs_xdrneg1; 1965 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1966 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1967 } 1968 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1969 if (!error) 1970 nfsm_mtofh(dvp, newvp, v3, gotvp); 1971 if (v3) 1972 nfsm_wcc_data(dvp, wccflag); 1973 nfsm_reqdone; 1974 VTONFS(dvp)->n_flag |= NMODIFIED; 1975 if (!wccflag) 1976 VTONFS(dvp)->n_attrstamp = 0; 1977 /* 1978 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1979 * if we can succeed in looking up the directory. 1980 */ 1981 if (error == EEXIST || (!error && !gotvp)) { 1982 if (newvp) { 1983 vput(newvp); 1984 newvp = (struct vnode *)0; 1985 } 1986 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1987 cnp->cn_proc, &np); 1988 if (!error) { 1989 newvp = NFSTOV(np); 1990 if (newvp->v_type != VDIR) 1991 error = EEXIST; 1992 } 1993 } 1994 if (error) { 1995 if (newvp) 1996 vput(newvp); 1997 } else { 1998 if (cnp->cn_flags & MAKEENTRY) 1999 cache_enter(dvp, newvp, cnp); 2000 *ap->a_vpp = newvp; 2001 } 2002 PNBUF_PUT(cnp->cn_pnbuf); 2003 vput(dvp); 2004 return (error); 2005 } 2006 2007 /* 2008 * nfs remove directory call 2009 */ 2010 int 2011 nfs_rmdir(v) 2012 void *v; 2013 { 2014 struct vop_rmdir_args /* { 2015 struct vnode *a_dvp; 2016 struct vnode *a_vp; 2017 struct componentname *a_cnp; 2018 } */ *ap = v; 2019 struct vnode *vp = ap->a_vp; 2020 struct vnode *dvp = ap->a_dvp; 2021 struct componentname *cnp = ap->a_cnp; 2022 u_int32_t *tl; 2023 caddr_t cp; 2024 int32_t t1, t2; 2025 caddr_t bpos, dpos, cp2; 2026 int error = 0, wccflag = NFSV3_WCCRATTR; 2027 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2028 const int v3 = NFS_ISV3(dvp); 2029 2030 if (dvp == vp) { 2031 vrele(dvp); 2032 vput(dvp); 2033 PNBUF_PUT(cnp->cn_pnbuf); 2034 return (EINVAL); 2035 } 2036 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2037 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2038 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2039 nfsm_fhtom(dvp, v3); 2040 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2041 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2042 if (v3) 2043 nfsm_wcc_data(dvp, wccflag); 2044 nfsm_reqdone; 2045 PNBUF_PUT(cnp->cn_pnbuf); 2046 VTONFS(dvp)->n_flag |= NMODIFIED; 2047 if (!wccflag) 2048 VTONFS(dvp)->n_attrstamp = 0; 2049 cache_purge(dvp); 2050 cache_purge(vp); 2051 vput(vp); 2052 vput(dvp); 2053 /* 2054 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2055 */ 2056 if (error == ENOENT) 2057 error = 0; 2058 return (error); 2059 } 2060 2061 /* 2062 * nfs readdir call 2063 */ 2064 int 2065 nfs_readdir(v) 2066 void *v; 2067 { 2068 struct vop_readdir_args /* { 2069 struct vnode *a_vp; 2070 struct uio *a_uio; 2071 struct ucred *a_cred; 2072 int *a_eofflag; 2073 off_t **a_cookies; 2074 int *a_ncookies; 2075 } */ *ap = v; 2076 struct vnode *vp = ap->a_vp; 2077 struct uio *uio = ap->a_uio; 2078 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2079 char *base = uio->uio_iov->iov_base; 2080 int tresid, error; 2081 size_t count, lost; 2082 struct dirent *dp; 2083 off_t *cookies = NULL; 2084 int ncookies = 0, nc; 2085 2086 if (vp->v_type != VDIR) 2087 return (EPERM); 2088 2089 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2090 count = uio->uio_resid - lost; 2091 if (count <= 0) 2092 return (EINVAL); 2093 2094 /* 2095 * Call nfs_bioread() to do the real work. 2096 */ 2097 tresid = uio->uio_resid = count; 2098 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2099 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2100 2101 if (!error && ap->a_cookies) { 2102 ncookies = count / 16; 2103 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2104 *ap->a_cookies = cookies; 2105 } 2106 2107 if (!error && uio->uio_resid == tresid) { 2108 uio->uio_resid += lost; 2109 nfsstats.direofcache_misses++; 2110 if (ap->a_cookies) 2111 *ap->a_ncookies = 0; 2112 *ap->a_eofflag = 1; 2113 return (0); 2114 } 2115 2116 if (!error && ap->a_cookies) { 2117 /* 2118 * Only the NFS server and emulations use cookies, and they 2119 * load the directory block into system space, so we can 2120 * just look at it directly. 2121 */ 2122 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2123 panic("nfs_readdir: lost in space"); 2124 for (nc = 0; ncookies-- && 2125 base < (char *)uio->uio_iov->iov_base; nc++){ 2126 dp = (struct dirent *) base; 2127 if (dp->d_reclen == 0) 2128 break; 2129 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2130 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2131 else 2132 *(cookies++) = NFS_GETCOOKIE(dp); 2133 base += dp->d_reclen; 2134 } 2135 uio->uio_resid += 2136 ((caddr_t)uio->uio_iov->iov_base - base); 2137 uio->uio_iov->iov_len += 2138 ((caddr_t)uio->uio_iov->iov_base - base); 2139 uio->uio_iov->iov_base = base; 2140 *ap->a_ncookies = nc; 2141 } 2142 2143 uio->uio_resid += lost; 2144 *ap->a_eofflag = 0; 2145 return (error); 2146 } 2147 2148 /* 2149 * Readdir rpc call. 2150 * Called from below the buffer cache by nfs_doio(). 2151 */ 2152 int 2153 nfs_readdirrpc(vp, uiop, cred) 2154 struct vnode *vp; 2155 struct uio *uiop; 2156 struct ucred *cred; 2157 { 2158 int len, left; 2159 struct dirent *dp = NULL; 2160 u_int32_t *tl; 2161 caddr_t cp; 2162 int32_t t1, t2; 2163 caddr_t bpos, dpos, cp2; 2164 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2165 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2166 struct nfsnode *dnp = VTONFS(vp); 2167 u_quad_t fileno; 2168 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2169 int attrflag, nrpcs = 0, reclen; 2170 const int v3 = NFS_ISV3(vp); 2171 nfsquad_t cookie; 2172 2173 #ifdef DIAGNOSTIC 2174 /* 2175 * Should be called from buffer cache, so only amount of 2176 * NFS_DIRBLKSIZ will be requested. 2177 */ 2178 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2179 panic("nfs readdirrpc bad uio"); 2180 #endif 2181 2182 /* 2183 * Loop around doing readdir rpc's of size nm_readdirsize 2184 * truncated to a multiple of NFS_DIRFRAGSIZ. 2185 * The stopping criteria is EOF or buffer full. 2186 */ 2187 while (more_dirs && bigenough) { 2188 /* 2189 * Heuristic: don't bother to do another RPC to further 2190 * fill up this block if there is not much room left. (< 50% 2191 * of the readdir RPC size). This wastes some buffer space 2192 * but can save up to 50% in RPC calls. 2193 */ 2194 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2195 bigenough = 0; 2196 break; 2197 } 2198 nfsstats.rpccnt[NFSPROC_READDIR]++; 2199 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2200 NFSX_READDIR(v3)); 2201 nfsm_fhtom(vp, v3); 2202 if (v3) { 2203 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2204 cookie.qval = uiop->uio_offset; 2205 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2206 txdr_swapcookie3(uiop->uio_offset, tl); 2207 } else { 2208 txdr_cookie3(uiop->uio_offset, tl); 2209 } 2210 tl += 2; 2211 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2212 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2213 } else { 2214 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2215 *tl++ = txdr_unsigned(uiop->uio_offset); 2216 } 2217 *tl = txdr_unsigned(nmp->nm_readdirsize); 2218 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2219 nrpcs++; 2220 if (v3) { 2221 nfsm_postop_attr(vp, attrflag); 2222 if (!error) { 2223 nfsm_dissect(tl, u_int32_t *, 2224 2 * NFSX_UNSIGNED); 2225 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2226 dnp->n_cookieverf.nfsuquad[1] = *tl; 2227 } else { 2228 m_freem(mrep); 2229 goto nfsmout; 2230 } 2231 } 2232 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2233 more_dirs = fxdr_unsigned(int, *tl); 2234 2235 /* loop thru the dir entries, doctoring them to 4bsd form */ 2236 while (more_dirs && bigenough) { 2237 if (v3) { 2238 nfsm_dissect(tl, u_int32_t *, 2239 3 * NFSX_UNSIGNED); 2240 fileno = fxdr_hyper(tl); 2241 len = fxdr_unsigned(int, *(tl + 2)); 2242 } else { 2243 nfsm_dissect(tl, u_int32_t *, 2244 2 * NFSX_UNSIGNED); 2245 fileno = fxdr_unsigned(u_quad_t, *tl++); 2246 len = fxdr_unsigned(int, *tl); 2247 } 2248 if (len <= 0 || len > NFS_MAXNAMLEN) { 2249 error = EBADRPC; 2250 m_freem(mrep); 2251 goto nfsmout; 2252 } 2253 tlen = nfsm_rndup(len); 2254 if (tlen == len) 2255 tlen += 4; /* To ensure null termination */ 2256 tlen += sizeof (off_t) + sizeof (int); 2257 reclen = ALIGN(tlen + DIRHDSIZ); 2258 tlen = reclen - DIRHDSIZ; 2259 left = NFS_DIRFRAGSIZ - blksiz; 2260 if (reclen > left) { 2261 dp->d_reclen += left; 2262 uiop->uio_iov->iov_base = 2263 (caddr_t)uiop->uio_iov->iov_base + left; 2264 uiop->uio_iov->iov_len -= left; 2265 uiop->uio_resid -= left; 2266 blksiz = 0; 2267 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2268 } 2269 if (reclen > uiop->uio_resid) 2270 bigenough = 0; 2271 if (bigenough) { 2272 dp = (struct dirent *)uiop->uio_iov->iov_base; 2273 dp->d_fileno = (int)fileno; 2274 dp->d_namlen = len; 2275 dp->d_reclen = reclen; 2276 dp->d_type = DT_UNKNOWN; 2277 blksiz += dp->d_reclen; 2278 if (blksiz == NFS_DIRFRAGSIZ) 2279 blksiz = 0; 2280 uiop->uio_resid -= DIRHDSIZ; 2281 uiop->uio_iov->iov_base = 2282 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2283 uiop->uio_iov->iov_len -= DIRHDSIZ; 2284 nfsm_mtouio(uiop, len); 2285 cp = uiop->uio_iov->iov_base; 2286 tlen -= len; 2287 *cp = '\0'; /* null terminate */ 2288 uiop->uio_iov->iov_base = 2289 (caddr_t)uiop->uio_iov->iov_base + tlen; 2290 uiop->uio_iov->iov_len -= tlen; 2291 uiop->uio_resid -= tlen; 2292 } else 2293 nfsm_adv(nfsm_rndup(len)); 2294 if (v3) { 2295 nfsm_dissect(tl, u_int32_t *, 2296 3 * NFSX_UNSIGNED); 2297 } else { 2298 nfsm_dissect(tl, u_int32_t *, 2299 2 * NFSX_UNSIGNED); 2300 } 2301 if (bigenough) { 2302 if (v3) { 2303 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2304 uiop->uio_offset = 2305 fxdr_swapcookie3(tl); 2306 else 2307 uiop->uio_offset = 2308 fxdr_cookie3(tl); 2309 } 2310 else { 2311 uiop->uio_offset = 2312 fxdr_unsigned(off_t, *tl); 2313 } 2314 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2315 } 2316 if (v3) 2317 tl += 2; 2318 else 2319 tl++; 2320 more_dirs = fxdr_unsigned(int, *tl); 2321 } 2322 /* 2323 * If at end of rpc data, get the eof boolean 2324 */ 2325 if (!more_dirs) { 2326 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2327 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2328 } 2329 m_freem(mrep); 2330 } 2331 /* 2332 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2333 * by increasing d_reclen for the last record. 2334 */ 2335 if (blksiz > 0) { 2336 left = NFS_DIRFRAGSIZ - blksiz; 2337 dp->d_reclen += left; 2338 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2339 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2340 left; 2341 uiop->uio_iov->iov_len -= left; 2342 uiop->uio_resid -= left; 2343 } 2344 2345 /* 2346 * We are now either at the end of the directory or have filled the 2347 * block. 2348 */ 2349 if (bigenough) 2350 dnp->n_direofoffset = uiop->uio_offset; 2351 nfsmout: 2352 return (error); 2353 } 2354 2355 /* 2356 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2357 */ 2358 int 2359 nfs_readdirplusrpc(vp, uiop, cred) 2360 struct vnode *vp; 2361 struct uio *uiop; 2362 struct ucred *cred; 2363 { 2364 int len, left; 2365 struct dirent *dp = NULL; 2366 u_int32_t *tl; 2367 caddr_t cp; 2368 int32_t t1, t2; 2369 struct vnode *newvp; 2370 caddr_t bpos, dpos, cp2; 2371 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2372 struct nameidata nami, *ndp = &nami; 2373 struct componentname *cnp = &ndp->ni_cnd; 2374 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2375 struct nfsnode *dnp = VTONFS(vp), *np; 2376 const unsigned char *hcp; 2377 nfsfh_t *fhp; 2378 u_quad_t fileno; 2379 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2380 int attrflag, fhsize, nrpcs = 0, reclen; 2381 struct nfs_fattr fattr, *fp; 2382 2383 #ifdef DIAGNOSTIC 2384 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2385 panic("nfs readdirplusrpc bad uio"); 2386 #endif 2387 ndp->ni_dvp = vp; 2388 newvp = NULLVP; 2389 2390 /* 2391 * Loop around doing readdir rpc's of size nm_readdirsize 2392 * truncated to a multiple of NFS_DIRFRAGSIZ. 2393 * The stopping criteria is EOF or buffer full. 2394 */ 2395 while (more_dirs && bigenough) { 2396 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2397 bigenough = 0; 2398 break; 2399 } 2400 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2401 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2402 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2403 nfsm_fhtom(vp, 1); 2404 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2405 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2406 txdr_swapcookie3(uiop->uio_offset, tl); 2407 } else { 2408 txdr_cookie3(uiop->uio_offset, tl); 2409 } 2410 tl += 2; 2411 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2412 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2413 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2414 *tl = txdr_unsigned(nmp->nm_rsize); 2415 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2416 nfsm_postop_attr(vp, attrflag); 2417 if (error) { 2418 m_freem(mrep); 2419 goto nfsmout; 2420 } 2421 nrpcs++; 2422 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2423 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2424 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2425 more_dirs = fxdr_unsigned(int, *tl); 2426 2427 /* loop thru the dir entries, doctoring them to 4bsd form */ 2428 while (more_dirs && bigenough) { 2429 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2430 fileno = fxdr_hyper(tl); 2431 len = fxdr_unsigned(int, *(tl + 2)); 2432 if (len <= 0 || len > NFS_MAXNAMLEN) { 2433 error = EBADRPC; 2434 m_freem(mrep); 2435 goto nfsmout; 2436 } 2437 tlen = nfsm_rndup(len); 2438 if (tlen == len) 2439 tlen += 4; /* To ensure null termination*/ 2440 tlen += sizeof (off_t) + sizeof (int); 2441 reclen = ALIGN(tlen + DIRHDSIZ); 2442 tlen = reclen - DIRHDSIZ; 2443 left = NFS_DIRFRAGSIZ - blksiz; 2444 if (reclen > left) { 2445 /* 2446 * DIRFRAGSIZ is aligned, no need to align 2447 * again here. 2448 */ 2449 dp->d_reclen += left; 2450 uiop->uio_iov->iov_base = 2451 (caddr_t)uiop->uio_iov->iov_base + left; 2452 uiop->uio_iov->iov_len -= left; 2453 uiop->uio_resid -= left; 2454 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2455 blksiz = 0; 2456 } 2457 if (reclen > uiop->uio_resid) 2458 bigenough = 0; 2459 if (bigenough) { 2460 dp = (struct dirent *)uiop->uio_iov->iov_base; 2461 dp->d_fileno = (int)fileno; 2462 dp->d_namlen = len; 2463 dp->d_reclen = reclen; 2464 dp->d_type = DT_UNKNOWN; 2465 blksiz += dp->d_reclen; 2466 if (blksiz == NFS_DIRFRAGSIZ) 2467 blksiz = 0; 2468 uiop->uio_resid -= DIRHDSIZ; 2469 uiop->uio_iov->iov_base = 2470 (caddr_t)uiop->uio_iov->iov_base + 2471 DIRHDSIZ; 2472 uiop->uio_iov->iov_len -= DIRHDSIZ; 2473 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2474 cnp->cn_namelen = len; 2475 nfsm_mtouio(uiop, len); 2476 cp = uiop->uio_iov->iov_base; 2477 tlen -= len; 2478 *cp = '\0'; 2479 uiop->uio_iov->iov_base = 2480 (caddr_t)uiop->uio_iov->iov_base + tlen; 2481 uiop->uio_iov->iov_len -= tlen; 2482 uiop->uio_resid -= tlen; 2483 } else 2484 nfsm_adv(nfsm_rndup(len)); 2485 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2486 if (bigenough) { 2487 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2488 uiop->uio_offset = 2489 fxdr_swapcookie3(tl); 2490 else 2491 uiop->uio_offset = 2492 fxdr_cookie3(tl); 2493 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2494 } 2495 tl += 2; 2496 2497 /* 2498 * Since the attributes are before the file handle 2499 * (sigh), we must skip over the attributes and then 2500 * come back and get them. 2501 */ 2502 attrflag = fxdr_unsigned(int, *tl); 2503 if (attrflag) { 2504 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2505 memcpy(&fattr, fp, NFSX_V3FATTR); 2506 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2507 doit = fxdr_unsigned(int, *tl); 2508 if (doit) { 2509 nfsm_getfh(fhp, fhsize, 1); 2510 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2511 VREF(vp); 2512 newvp = vp; 2513 np = dnp; 2514 } else { 2515 error = nfs_nget(vp->v_mount, fhp, 2516 fhsize, &np); 2517 if (!error) 2518 newvp = NFSTOV(np); 2519 } 2520 if (!error) { 2521 nfs_loadattrcache(&newvp, &fattr, 0); 2522 dp->d_type = 2523 IFTODT(VTTOIF(np->n_vattr->va_type)); 2524 ndp->ni_vp = newvp; 2525 cnp->cn_hash = 0; 2526 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2527 i++, hcp++) 2528 cnp->cn_hash += *hcp * i; 2529 if (cnp->cn_namelen <= NCHNAMLEN) 2530 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2531 cnp); 2532 } 2533 } 2534 } else { 2535 /* Just skip over the file handle */ 2536 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2537 i = fxdr_unsigned(int, *tl); 2538 nfsm_adv(nfsm_rndup(i)); 2539 } 2540 if (newvp != NULLVP) { 2541 vrele(newvp); 2542 if (newvp != vp) 2543 VOP_UNLOCK(vp, 0); 2544 newvp = NULLVP; 2545 } 2546 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2547 more_dirs = fxdr_unsigned(int, *tl); 2548 } 2549 /* 2550 * If at end of rpc data, get the eof boolean 2551 */ 2552 if (!more_dirs) { 2553 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2554 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2555 } 2556 m_freem(mrep); 2557 } 2558 /* 2559 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2560 * by increasing d_reclen for the last record. 2561 */ 2562 if (blksiz > 0) { 2563 left = NFS_DIRFRAGSIZ - blksiz; 2564 dp->d_reclen += left; 2565 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2566 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2567 left; 2568 uiop->uio_iov->iov_len -= left; 2569 uiop->uio_resid -= left; 2570 } 2571 2572 /* 2573 * We are now either at the end of the directory or have filled the 2574 * block. 2575 */ 2576 if (bigenough) 2577 dnp->n_direofoffset = uiop->uio_offset; 2578 nfsmout: 2579 if (newvp != NULLVP) { 2580 vrele(newvp); 2581 if (newvp != vp) 2582 VOP_UNLOCK(vp, 0); 2583 } 2584 return (error); 2585 } 2586 static char hextoasc[] = "0123456789abcdef"; 2587 2588 /* 2589 * Silly rename. To make the NFS filesystem that is stateless look a little 2590 * more like the "ufs" a remove of an active vnode is translated to a rename 2591 * to a funny looking filename that is removed by nfs_inactive on the 2592 * nfsnode. There is the potential for another process on a different client 2593 * to create the same funny name between the nfs_lookitup() fails and the 2594 * nfs_rename() completes, but... 2595 */ 2596 int 2597 nfs_sillyrename(dvp, vp, cnp) 2598 struct vnode *dvp, *vp; 2599 struct componentname *cnp; 2600 { 2601 struct sillyrename *sp; 2602 struct nfsnode *np; 2603 int error; 2604 short pid; 2605 2606 cache_purge(dvp); 2607 np = VTONFS(vp); 2608 #ifndef DIAGNOSTIC 2609 if (vp->v_type == VDIR) 2610 panic("nfs: sillyrename dir"); 2611 #endif 2612 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2613 M_NFSREQ, M_WAITOK); 2614 sp->s_cred = crdup(cnp->cn_cred); 2615 sp->s_dvp = dvp; 2616 VREF(dvp); 2617 2618 /* Fudge together a funny name */ 2619 pid = cnp->cn_proc->p_pid; 2620 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2621 sp->s_namlen = 12; 2622 sp->s_name[8] = hextoasc[pid & 0xf]; 2623 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2624 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2625 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2626 2627 /* Try lookitups until we get one that isn't there */ 2628 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2629 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2630 sp->s_name[4]++; 2631 if (sp->s_name[4] > 'z') { 2632 error = EINVAL; 2633 goto bad; 2634 } 2635 } 2636 error = nfs_renameit(dvp, cnp, sp); 2637 if (error) 2638 goto bad; 2639 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2640 cnp->cn_proc, &np); 2641 np->n_sillyrename = sp; 2642 return (0); 2643 bad: 2644 vrele(sp->s_dvp); 2645 crfree(sp->s_cred); 2646 free((caddr_t)sp, M_NFSREQ); 2647 return (error); 2648 } 2649 2650 /* 2651 * Look up a file name and optionally either update the file handle or 2652 * allocate an nfsnode, depending on the value of npp. 2653 * npp == NULL --> just do the lookup 2654 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2655 * handled too 2656 * *npp != NULL --> update the file handle in the vnode 2657 */ 2658 int 2659 nfs_lookitup(dvp, name, len, cred, procp, npp) 2660 struct vnode *dvp; 2661 const char *name; 2662 int len; 2663 struct ucred *cred; 2664 struct proc *procp; 2665 struct nfsnode **npp; 2666 { 2667 u_int32_t *tl; 2668 caddr_t cp; 2669 int32_t t1, t2; 2670 struct vnode *newvp = (struct vnode *)0; 2671 struct nfsnode *np, *dnp = VTONFS(dvp); 2672 caddr_t bpos, dpos, cp2; 2673 int error = 0, fhlen, attrflag; 2674 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2675 nfsfh_t *nfhp; 2676 const int v3 = NFS_ISV3(dvp); 2677 2678 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2679 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2680 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2681 nfsm_fhtom(dvp, v3); 2682 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2683 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2684 if (npp && !error) { 2685 nfsm_getfh(nfhp, fhlen, v3); 2686 if (*npp) { 2687 np = *npp; 2688 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2689 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2690 np->n_fhp = &np->n_fh; 2691 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2692 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2693 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2694 np->n_fhsize = fhlen; 2695 newvp = NFSTOV(np); 2696 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2697 VREF(dvp); 2698 newvp = dvp; 2699 } else { 2700 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2701 if (error) { 2702 m_freem(mrep); 2703 return (error); 2704 } 2705 newvp = NFSTOV(np); 2706 } 2707 if (v3) { 2708 nfsm_postop_attr(newvp, attrflag); 2709 if (!attrflag && *npp == NULL) { 2710 m_freem(mrep); 2711 vput(newvp); 2712 return (ENOENT); 2713 } 2714 } else 2715 nfsm_loadattr(newvp, (struct vattr *)0); 2716 } 2717 nfsm_reqdone; 2718 if (npp && *npp == NULL) { 2719 if (error) { 2720 if (newvp) 2721 vput(newvp); 2722 } else 2723 *npp = np; 2724 } 2725 return (error); 2726 } 2727 2728 /* 2729 * Nfs Version 3 commit rpc 2730 */ 2731 int 2732 nfs_commit(vp, offset, cnt, procp) 2733 struct vnode *vp; 2734 off_t offset; 2735 uint32_t cnt; 2736 struct proc *procp; 2737 { 2738 caddr_t cp; 2739 u_int32_t *tl; 2740 int32_t t1, t2; 2741 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2742 caddr_t bpos, dpos, cp2; 2743 int error = 0, wccflag = NFSV3_WCCRATTR; 2744 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2745 2746 #ifdef fvdl_debug 2747 printf("commit %lu - %lu\n", (unsigned long)offset, 2748 (unsigned long)(offset + cnt)); 2749 #endif 2750 2751 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2752 return (0); 2753 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2754 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2755 nfsm_fhtom(vp, 1); 2756 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2757 txdr_hyper(offset, tl); 2758 tl += 2; 2759 *tl = txdr_unsigned(cnt); 2760 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2761 nfsm_wcc_data(vp, wccflag); 2762 if (!error) { 2763 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2764 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2765 NFSX_V3WRITEVERF)) { 2766 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2767 NFSX_V3WRITEVERF); 2768 error = NFSERR_STALEWRITEVERF; 2769 } 2770 } 2771 nfsm_reqdone; 2772 return (error); 2773 } 2774 2775 /* 2776 * Kludge City.. 2777 * - make nfs_bmap() essentially a no-op that does no translation 2778 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2779 * (Maybe I could use the process's page mapping, but I was concerned that 2780 * Kernel Write might not be enabled and also figured copyout() would do 2781 * a lot more work than memcpy() and also it currently happens in the 2782 * context of the swapper process (2). 2783 */ 2784 int 2785 nfs_bmap(v) 2786 void *v; 2787 { 2788 struct vop_bmap_args /* { 2789 struct vnode *a_vp; 2790 daddr_t a_bn; 2791 struct vnode **a_vpp; 2792 daddr_t *a_bnp; 2793 int *a_runp; 2794 } */ *ap = v; 2795 struct vnode *vp = ap->a_vp; 2796 2797 /* 2798 * XXX vpp should be returned unlocked? 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 * btodb(vp->v_mount->mnt_stat.f_iosize); 2804 return (0); 2805 } 2806 2807 /* 2808 * Strategy routine. 2809 * For async requests when nfsiod(s) are running, queue the request by 2810 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2811 * request. 2812 */ 2813 int 2814 nfs_strategy(v) 2815 void *v; 2816 { 2817 struct vop_strategy_args *ap = v; 2818 struct buf *bp = ap->a_bp; 2819 struct proc *p; 2820 int error = 0; 2821 2822 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2823 panic("nfs physio/async"); 2824 if (bp->b_flags & B_ASYNC) 2825 p = NULL; 2826 else 2827 p = curproc; /* XXX */ 2828 2829 /* 2830 * If the op is asynchronous and an i/o daemon is waiting 2831 * queue the request, wake it up and wait for completion 2832 * otherwise just do it ourselves. 2833 */ 2834 2835 if ((bp->b_flags & B_ASYNC) == 0 || 2836 nfs_asyncio(bp)) 2837 error = nfs_doio(bp, p); 2838 return (error); 2839 } 2840 2841 /* 2842 * fsync vnode op. Just call nfs_flush() with commit == 1. 2843 */ 2844 /* ARGSUSED */ 2845 int 2846 nfs_fsync(v) 2847 void *v; 2848 { 2849 struct vop_fsync_args /* { 2850 struct vnodeop_desc *a_desc; 2851 struct vnode * a_vp; 2852 struct ucred * a_cred; 2853 int a_flags; 2854 off_t offlo; 2855 off_t offhi; 2856 struct proc * a_p; 2857 } */ *ap = v; 2858 2859 return (nfs_flush(ap->a_vp, ap->a_cred, 2860 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2861 } 2862 2863 /* 2864 * Flush all the data associated with a vnode. 2865 */ 2866 int 2867 nfs_flush(vp, cred, waitfor, p, commit) 2868 struct vnode *vp; 2869 struct ucred *cred; 2870 int waitfor; 2871 struct proc *p; 2872 int commit; 2873 { 2874 struct uvm_object *uobj = &vp->v_uvm.u_obj; 2875 struct nfsnode *np = VTONFS(vp); 2876 int error; 2877 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2878 int rv; 2879 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2880 2881 error = 0; 2882 simple_lock(&uobj->vmobjlock); 2883 rv = (uobj->pgops->pgo_flush)(uobj, 0, 0, flushflags); 2884 simple_unlock(&uobj->vmobjlock); 2885 if (!rv) { 2886 error = EIO; 2887 } 2888 if (np->n_flag & NWRITEERR) { 2889 error = np->n_error; 2890 np->n_flag &= ~NWRITEERR; 2891 } 2892 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2893 return (error); 2894 } 2895 2896 /* 2897 * Return POSIX pathconf information applicable to nfs. 2898 * 2899 * N.B. The NFS V2 protocol doesn't support this RPC. 2900 */ 2901 /* ARGSUSED */ 2902 int 2903 nfs_pathconf(v) 2904 void *v; 2905 { 2906 struct vop_pathconf_args /* { 2907 struct vnode *a_vp; 2908 int a_name; 2909 register_t *a_retval; 2910 } */ *ap = v; 2911 struct nfsv3_pathconf *pcp; 2912 struct vnode *vp = ap->a_vp; 2913 struct nfsmount *nmp; 2914 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2915 int32_t t1, t2; 2916 u_int32_t *tl; 2917 caddr_t bpos, dpos, cp, cp2; 2918 int error = 0, attrflag; 2919 unsigned int l; 2920 u_int64_t maxsize; 2921 const int v3 = NFS_ISV3(vp); 2922 2923 switch (ap->a_name) { 2924 /* Names that can be resolved locally. */ 2925 case _PC_PIPE_BUF: 2926 *ap->a_retval = PIPE_BUF; 2927 break; 2928 case _PC_SYNC_IO: 2929 *ap->a_retval = 1; 2930 break; 2931 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2932 case _PC_LINK_MAX: 2933 case _PC_NAME_MAX: 2934 case _PC_CHOWN_RESTRICTED: 2935 case _PC_NO_TRUNC: 2936 if (!v3) { 2937 error = EINVAL; 2938 break; 2939 } 2940 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2941 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2942 nfsm_fhtom(vp, 1); 2943 nfsm_request(vp, NFSPROC_PATHCONF, 2944 curproc, curproc->p_ucred); /* XXX */ 2945 nfsm_postop_attr(vp, attrflag); 2946 if (!error) { 2947 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2948 NFSX_V3PATHCONF); 2949 switch (ap->a_name) { 2950 case _PC_LINK_MAX: 2951 *ap->a_retval = 2952 fxdr_unsigned(register_t, pcp->pc_linkmax); 2953 break; 2954 case _PC_NAME_MAX: 2955 *ap->a_retval = 2956 fxdr_unsigned(register_t, pcp->pc_namemax); 2957 break; 2958 case _PC_CHOWN_RESTRICTED: 2959 *ap->a_retval = 2960 (pcp->pc_chownrestricted == nfs_true); 2961 break; 2962 case _PC_NO_TRUNC: 2963 *ap->a_retval = 2964 (pcp->pc_notrunc == nfs_true); 2965 break; 2966 } 2967 } 2968 nfsm_reqdone; 2969 break; 2970 case _PC_FILESIZEBITS: 2971 if (v3) { 2972 nmp = VFSTONFS(vp->v_mount); 2973 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2974 if ((error = nfs_fsinfo(nmp, vp, 2975 curproc->p_ucred, curproc)) != 0) /* XXX */ 2976 break; 2977 for (l = 0, maxsize = nmp->nm_maxfilesize; 2978 (maxsize >> l) > 0; l++) 2979 ; 2980 *ap->a_retval = l + 1; 2981 } else { 2982 *ap->a_retval = 32; /* NFS V2 limitation */ 2983 } 2984 break; 2985 default: 2986 error = EINVAL; 2987 break; 2988 } 2989 2990 return (error); 2991 } 2992 2993 /* 2994 * NFS advisory byte-level locks. 2995 */ 2996 int 2997 nfs_advlock(v) 2998 void *v; 2999 { 3000 struct vop_advlock_args /* { 3001 struct vnode *a_vp; 3002 caddr_t a_id; 3003 int a_op; 3004 struct flock *a_fl; 3005 int a_flags; 3006 } */ *ap = v; 3007 struct nfsnode *np = VTONFS(ap->a_vp); 3008 3009 return lf_advlock(ap, &np->n_lockf, np->n_size); 3010 } 3011 3012 /* 3013 * Print out the contents of an nfsnode. 3014 */ 3015 int 3016 nfs_print(v) 3017 void *v; 3018 { 3019 struct vop_print_args /* { 3020 struct vnode *a_vp; 3021 } */ *ap = v; 3022 struct vnode *vp = ap->a_vp; 3023 struct nfsnode *np = VTONFS(vp); 3024 3025 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3026 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3027 if (vp->v_type == VFIFO) 3028 fifo_printinfo(vp); 3029 printf("\n"); 3030 return (0); 3031 } 3032 3033 /* 3034 * NFS file truncation. 3035 */ 3036 int 3037 nfs_truncate(v) 3038 void *v; 3039 { 3040 #if 0 3041 struct vop_truncate_args /* { 3042 struct vnode *a_vp; 3043 off_t a_length; 3044 int a_flags; 3045 struct ucred *a_cred; 3046 struct proc *a_p; 3047 } */ *ap = v; 3048 #endif 3049 3050 /* Use nfs_setattr */ 3051 return (EOPNOTSUPP); 3052 } 3053 3054 /* 3055 * NFS update. 3056 */ 3057 int 3058 nfs_update(v) 3059 void *v; 3060 #if 0 3061 struct vop_update_args /* { 3062 struct vnode *a_vp; 3063 struct timespec *a_ta; 3064 struct timespec *a_tm; 3065 int a_waitfor; 3066 } */ *ap = v; 3067 #endif 3068 { 3069 3070 /* Use nfs_setattr */ 3071 return (EOPNOTSUPP); 3072 } 3073 3074 /* 3075 * Just call bwrite(). 3076 */ 3077 int 3078 nfs_bwrite(v) 3079 void *v; 3080 { 3081 struct vop_bwrite_args /* { 3082 struct vnode *a_bp; 3083 } */ *ap = v; 3084 3085 return (bwrite(ap->a_bp)); 3086 } 3087 3088 /* 3089 * nfs special file access vnode op. 3090 * Essentially just get vattr and then imitate iaccess() since the device is 3091 * local to the client. 3092 */ 3093 int 3094 nfsspec_access(v) 3095 void *v; 3096 { 3097 struct vop_access_args /* { 3098 struct vnode *a_vp; 3099 int a_mode; 3100 struct ucred *a_cred; 3101 struct proc *a_p; 3102 } */ *ap = v; 3103 struct vattr va; 3104 struct vnode *vp = ap->a_vp; 3105 int error; 3106 3107 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3108 if (error) 3109 return (error); 3110 3111 /* 3112 * Disallow write attempts on filesystems mounted read-only; 3113 * unless the file is a socket, fifo, or a block or character 3114 * device resident on the filesystem. 3115 */ 3116 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3117 switch (vp->v_type) { 3118 case VREG: 3119 case VDIR: 3120 case VLNK: 3121 return (EROFS); 3122 default: 3123 break; 3124 } 3125 } 3126 3127 return (vaccess(va.va_type, va.va_mode, 3128 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3129 } 3130 3131 /* 3132 * Read wrapper for special devices. 3133 */ 3134 int 3135 nfsspec_read(v) 3136 void *v; 3137 { 3138 struct vop_read_args /* { 3139 struct vnode *a_vp; 3140 struct uio *a_uio; 3141 int a_ioflag; 3142 struct ucred *a_cred; 3143 } */ *ap = v; 3144 struct nfsnode *np = VTONFS(ap->a_vp); 3145 3146 /* 3147 * Set access flag. 3148 */ 3149 np->n_flag |= NACC; 3150 np->n_atim.tv_sec = time.tv_sec; 3151 np->n_atim.tv_nsec = time.tv_usec * 1000; 3152 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3153 } 3154 3155 /* 3156 * Write wrapper for special devices. 3157 */ 3158 int 3159 nfsspec_write(v) 3160 void *v; 3161 { 3162 struct vop_write_args /* { 3163 struct vnode *a_vp; 3164 struct uio *a_uio; 3165 int a_ioflag; 3166 struct ucred *a_cred; 3167 } */ *ap = v; 3168 struct nfsnode *np = VTONFS(ap->a_vp); 3169 3170 /* 3171 * Set update flag. 3172 */ 3173 np->n_flag |= NUPD; 3174 np->n_mtim.tv_sec = time.tv_sec; 3175 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3176 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3177 } 3178 3179 /* 3180 * Close wrapper for special devices. 3181 * 3182 * Update the times on the nfsnode then do device close. 3183 */ 3184 int 3185 nfsspec_close(v) 3186 void *v; 3187 { 3188 struct vop_close_args /* { 3189 struct vnode *a_vp; 3190 int a_fflag; 3191 struct ucred *a_cred; 3192 struct proc *a_p; 3193 } */ *ap = v; 3194 struct vnode *vp = ap->a_vp; 3195 struct nfsnode *np = VTONFS(vp); 3196 struct vattr vattr; 3197 3198 if (np->n_flag & (NACC | NUPD)) { 3199 np->n_flag |= NCHG; 3200 if (vp->v_usecount == 1 && 3201 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3202 VATTR_NULL(&vattr); 3203 if (np->n_flag & NACC) 3204 vattr.va_atime = np->n_atim; 3205 if (np->n_flag & NUPD) 3206 vattr.va_mtime = np->n_mtim; 3207 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3208 } 3209 } 3210 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3211 } 3212 3213 /* 3214 * Read wrapper for fifos. 3215 */ 3216 int 3217 nfsfifo_read(v) 3218 void *v; 3219 { 3220 struct vop_read_args /* { 3221 struct vnode *a_vp; 3222 struct uio *a_uio; 3223 int a_ioflag; 3224 struct ucred *a_cred; 3225 } */ *ap = v; 3226 struct nfsnode *np = VTONFS(ap->a_vp); 3227 3228 /* 3229 * Set access flag. 3230 */ 3231 np->n_flag |= NACC; 3232 np->n_atim.tv_sec = time.tv_sec; 3233 np->n_atim.tv_nsec = time.tv_usec * 1000; 3234 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3235 } 3236 3237 /* 3238 * Write wrapper for fifos. 3239 */ 3240 int 3241 nfsfifo_write(v) 3242 void *v; 3243 { 3244 struct vop_write_args /* { 3245 struct vnode *a_vp; 3246 struct uio *a_uio; 3247 int a_ioflag; 3248 struct ucred *a_cred; 3249 } */ *ap = v; 3250 struct nfsnode *np = VTONFS(ap->a_vp); 3251 3252 /* 3253 * Set update flag. 3254 */ 3255 np->n_flag |= NUPD; 3256 np->n_mtim.tv_sec = time.tv_sec; 3257 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3258 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3259 } 3260 3261 /* 3262 * Close wrapper for fifos. 3263 * 3264 * Update the times on the nfsnode then do fifo close. 3265 */ 3266 int 3267 nfsfifo_close(v) 3268 void *v; 3269 { 3270 struct vop_close_args /* { 3271 struct vnode *a_vp; 3272 int a_fflag; 3273 struct ucred *a_cred; 3274 struct proc *a_p; 3275 } */ *ap = v; 3276 struct vnode *vp = ap->a_vp; 3277 struct nfsnode *np = VTONFS(vp); 3278 struct vattr vattr; 3279 3280 if (np->n_flag & (NACC | NUPD)) { 3281 if (np->n_flag & NACC) { 3282 np->n_atim.tv_sec = time.tv_sec; 3283 np->n_atim.tv_nsec = time.tv_usec * 1000; 3284 } 3285 if (np->n_flag & NUPD) { 3286 np->n_mtim.tv_sec = time.tv_sec; 3287 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3288 } 3289 np->n_flag |= NCHG; 3290 if (vp->v_usecount == 1 && 3291 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3292 VATTR_NULL(&vattr); 3293 if (np->n_flag & NACC) 3294 vattr.va_atime = np->n_atim; 3295 if (np->n_flag & NUPD) 3296 vattr.va_mtime = np->n_mtim; 3297 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3298 } 3299 } 3300 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3301 } 3302
Indexes created Tue Sep 23 07:09:52 GMT 2025