nfs_vnops.c revision 1.137.2.2
1 /* $NetBSD: nfs_vnops.c,v 1.137.2.2 2001/10/01 12:48:04 fvdl Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include "opt_nfs.h" 46 #include "opt_uvmhist.h" 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/resourcevar.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/malloc.h> 57 #include <sys/mbuf.h> 58 #include <sys/namei.h> 59 #include <sys/vnode.h> 60 #include <sys/dirent.h> 61 #include <sys/fcntl.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/unistd.h> 65 66 #include <uvm/uvm_extern.h> 67 #include <uvm/uvm.h> 68 69 #include <miscfs/fifofs/fifo.h> 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsproto.h> 75 #include <nfs/nfs.h> 76 #include <nfs/nfsnode.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/xdr_subs.h> 79 #include <nfs/nfsm_subs.h> 80 #include <nfs/nqnfs.h> 81 #include <nfs/nfs_var.h> 82 83 #include <net/if.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 87 /* Defs */ 88 #define TRUE 1 89 #define FALSE 0 90 91 /* 92 * Global vfs data structures for nfs 93 */ 94 int (**nfsv2_vnodeop_p) __P((void *)); 95 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 96 { &vop_default_desc, vn_default_error }, 97 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 98 { &vop_create_desc, nfs_create }, /* create */ 99 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 100 { &vop_open_desc, nfs_open }, /* open */ 101 { &vop_close_desc, nfs_close }, /* close */ 102 { &vop_access_desc, nfs_access }, /* access */ 103 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 104 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 105 { &vop_read_desc, nfs_read }, /* read */ 106 { &vop_write_desc, nfs_write }, /* write */ 107 { &vop_lease_desc, nfs_lease_check }, /* lease */ 108 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, nfs_poll }, /* poll */ 111 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 112 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 113 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 114 { &vop_seek_desc, nfs_seek }, /* seek */ 115 { &vop_remove_desc, nfs_remove }, /* remove */ 116 { &vop_link_desc, nfs_link }, /* link */ 117 { &vop_rename_desc, nfs_rename }, /* rename */ 118 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 119 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 120 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 121 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 122 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 123 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 124 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 125 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 126 { &vop_lock_desc, nfs_lock }, /* lock */ 127 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 128 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 129 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 130 { &vop_print_desc, nfs_print }, /* print */ 131 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 132 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 133 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 134 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 135 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 136 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 137 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 138 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 139 { &vop_update_desc, nfs_update }, /* update */ 140 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 141 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 142 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 143 { NULL, NULL } 144 }; 145 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 146 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 147 148 /* 149 * Special device vnode ops 150 */ 151 int (**spec_nfsv2nodeop_p) __P((void *)); 152 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 153 { &vop_default_desc, vn_default_error }, 154 { &vop_lookup_desc, spec_lookup }, /* lookup */ 155 { &vop_create_desc, spec_create }, /* create */ 156 { &vop_mknod_desc, spec_mknod }, /* mknod */ 157 { &vop_open_desc, spec_open }, /* open */ 158 { &vop_close_desc, nfsspec_close }, /* close */ 159 { &vop_access_desc, nfsspec_access }, /* access */ 160 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 161 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 162 { &vop_read_desc, nfsspec_read }, /* read */ 163 { &vop_write_desc, nfsspec_write }, /* write */ 164 { &vop_lease_desc, spec_lease_check }, /* lease */ 165 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 166 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 167 { &vop_poll_desc, spec_poll }, /* poll */ 168 { &vop_revoke_desc, spec_revoke }, /* revoke */ 169 { &vop_mmap_desc, spec_mmap }, /* mmap */ 170 { &vop_fsync_desc, spec_fsync }, /* fsync */ 171 { &vop_seek_desc, spec_seek }, /* seek */ 172 { &vop_remove_desc, spec_remove }, /* remove */ 173 { &vop_link_desc, spec_link }, /* link */ 174 { &vop_rename_desc, spec_rename }, /* rename */ 175 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 176 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 177 { &vop_symlink_desc, spec_symlink }, /* symlink */ 178 { &vop_readdir_desc, spec_readdir }, /* readdir */ 179 { &vop_readlink_desc, spec_readlink }, /* readlink */ 180 { &vop_abortop_desc, spec_abortop }, /* abortop */ 181 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 182 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 183 { &vop_lock_desc, nfs_lock }, /* lock */ 184 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 185 { &vop_bmap_desc, spec_bmap }, /* bmap */ 186 { &vop_strategy_desc, spec_strategy }, /* strategy */ 187 { &vop_print_desc, nfs_print }, /* print */ 188 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 189 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 190 { &vop_advlock_desc, spec_advlock }, /* advlock */ 191 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 192 { &vop_valloc_desc, spec_valloc }, /* valloc */ 193 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 194 { &vop_vfree_desc, spec_vfree }, /* vfree */ 195 { &vop_truncate_desc, spec_truncate }, /* truncate */ 196 { &vop_update_desc, nfs_update }, /* update */ 197 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 198 { &vop_getpages_desc, spec_getpages }, /* getpages */ 199 { &vop_putpages_desc, spec_putpages }, /* putpages */ 200 { NULL, NULL } 201 }; 202 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 203 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 204 205 int (**fifo_nfsv2nodeop_p) __P((void *)); 206 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 207 { &vop_default_desc, vn_default_error }, 208 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 209 { &vop_create_desc, fifo_create }, /* create */ 210 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 211 { &vop_open_desc, fifo_open }, /* open */ 212 { &vop_close_desc, nfsfifo_close }, /* close */ 213 { &vop_access_desc, nfsspec_access }, /* access */ 214 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 215 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 216 { &vop_read_desc, nfsfifo_read }, /* read */ 217 { &vop_write_desc, nfsfifo_write }, /* write */ 218 { &vop_lease_desc, fifo_lease_check }, /* lease */ 219 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 220 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 221 { &vop_poll_desc, fifo_poll }, /* poll */ 222 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 223 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 224 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 225 { &vop_seek_desc, fifo_seek }, /* seek */ 226 { &vop_remove_desc, fifo_remove }, /* remove */ 227 { &vop_link_desc, fifo_link }, /* link */ 228 { &vop_rename_desc, fifo_rename }, /* rename */ 229 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 230 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 231 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 232 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 233 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 234 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 235 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 236 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 237 { &vop_lock_desc, nfs_lock }, /* lock */ 238 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 239 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 240 { &vop_strategy_desc, genfs_badop }, /* strategy */ 241 { &vop_print_desc, nfs_print }, /* print */ 242 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 243 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 244 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 245 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 246 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 247 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 248 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 249 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 250 { &vop_update_desc, nfs_update }, /* update */ 251 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 252 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 253 { NULL, NULL } 254 }; 255 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 256 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 257 258 /* 259 * Global variables 260 */ 261 extern u_int32_t nfs_true, nfs_false; 262 extern u_int32_t nfs_xdrneg1; 263 extern struct nfsstats nfsstats; 264 extern nfstype nfsv3_type[9]; 265 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 266 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 267 int nfs_numasync = 0; 268 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 269 270 /* 271 * nfs null call from vfs. 272 */ 273 int 274 nfs_null(vp, cred, procp) 275 struct vnode *vp; 276 struct ucred *cred; 277 struct proc *procp; 278 { 279 caddr_t bpos, dpos; 280 int error = 0; 281 struct mbuf *mreq, *mrep, *md, *mb; 282 283 nfsm_reqhead(vp, NFSPROC_NULL, 0); 284 nfsm_request(vp, NFSPROC_NULL, procp, cred); 285 nfsm_reqdone; 286 return (error); 287 } 288 289 /* 290 * nfs access vnode op. 291 * For nfs version 2, just return ok. File accesses may fail later. 292 * For nfs version 3, use the access rpc to check accessibility. If file modes 293 * are changed on the server, accesses might still fail later. 294 */ 295 int 296 nfs_access(v) 297 void *v; 298 { 299 struct vop_access_args /* { 300 struct vnode *a_vp; 301 int a_mode; 302 struct ucred *a_cred; 303 struct proc *a_p; 304 } */ *ap = v; 305 struct vnode *vp = ap->a_vp; 306 u_int32_t *tl; 307 caddr_t cp; 308 int32_t t1, t2; 309 caddr_t bpos, dpos, cp2; 310 int error = 0, attrflag, cachevalid; 311 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 312 u_int32_t mode, rmode; 313 const int v3 = NFS_ISV3(vp); 314 struct nfsnode *np = VTONFS(vp); 315 316 cachevalid = (np->n_accstamp != -1 && 317 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 318 np->n_accuid == ap->a_cred->cr_uid); 319 320 /* 321 * Check access cache first. If this request has been made for this 322 * uid shortly before, use the cached result. 323 */ 324 if (cachevalid) { 325 if (!np->n_accerror) { 326 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 327 return np->n_accerror; 328 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 329 return np->n_accerror; 330 } 331 332 /* 333 * For nfs v3, do an access rpc, otherwise you are stuck emulating 334 * ufs_access() locally using the vattr. This may not be correct, 335 * since the server may apply other access criteria such as 336 * client uid-->server uid mapping that we do not know about, but 337 * this is better than just returning anything that is lying about 338 * in the cache. 339 */ 340 if (v3) { 341 nfsstats.rpccnt[NFSPROC_ACCESS]++; 342 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 343 nfsm_fhtom(vp, v3); 344 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 345 if (ap->a_mode & VREAD) 346 mode = NFSV3ACCESS_READ; 347 else 348 mode = 0; 349 if (vp->v_type != VDIR) { 350 if (ap->a_mode & VWRITE) 351 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 352 if (ap->a_mode & VEXEC) 353 mode |= NFSV3ACCESS_EXECUTE; 354 } else { 355 if (ap->a_mode & VWRITE) 356 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 357 NFSV3ACCESS_DELETE); 358 if (ap->a_mode & VEXEC) 359 mode |= NFSV3ACCESS_LOOKUP; 360 } 361 *tl = txdr_unsigned(mode); 362 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 363 nfsm_postop_attr(vp, attrflag); 364 if (!error) { 365 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 366 rmode = fxdr_unsigned(u_int32_t, *tl); 367 /* 368 * The NFS V3 spec does not clarify whether or not 369 * the returned access bits can be a superset of 370 * the ones requested, so... 371 */ 372 if ((rmode & mode) != mode) 373 error = EACCES; 374 } 375 nfsm_reqdone; 376 } else 377 return (nfsspec_access(ap)); 378 /* 379 * Disallow write attempts on filesystems mounted read-only; 380 * unless the file is a socket, fifo, or a block or character 381 * device resident on the filesystem. 382 */ 383 if (!error && (ap->a_mode & VWRITE) && 384 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 385 switch (vp->v_type) { 386 case VREG: 387 case VDIR: 388 case VLNK: 389 error = EROFS; 390 default: 391 break; 392 } 393 } 394 395 if (!error || error == EACCES) { 396 /* 397 * If we got the same result as for a previous, 398 * different request, OR it in. Don't update 399 * the timestamp in that case. 400 */ 401 if (cachevalid && error == np->n_accerror) { 402 if (!error) 403 np->n_accmode |= ap->a_mode; 404 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 405 np->n_accmode = ap->a_mode; 406 } else { 407 np->n_accstamp = time.tv_sec; 408 np->n_accuid = ap->a_cred->cr_uid; 409 np->n_accmode = ap->a_mode; 410 np->n_accerror = error; 411 } 412 } 413 414 return (error); 415 } 416 417 /* 418 * nfs open vnode op 419 * Check to see if the type is ok 420 * and that deletion is not in progress. 421 * For paged in text files, you will need to flush the page cache 422 * if consistency is lost. 423 */ 424 /* ARGSUSED */ 425 int 426 nfs_open(v) 427 void *v; 428 { 429 struct vop_open_args /* { 430 struct vnode *a_vp; 431 int a_mode; 432 struct ucred *a_cred; 433 struct proc *a_p; 434 struct vnode *a_vpp; 435 } */ *ap = v; 436 struct vnode *vp = ap->a_vp; 437 struct nfsnode *np = VTONFS(vp); 438 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 439 struct vattr vattr; 440 int error; 441 442 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 443 return (EACCES); 444 } 445 446 /* 447 * Initialize read and write creds here, for swapfiles 448 * and other paths that don't set the creds themselves. 449 */ 450 451 if (ap->a_mode & FREAD) { 452 if (np->n_rcred) { 453 crfree(np->n_rcred); 454 } 455 np->n_rcred = ap->a_cred; 456 crhold(np->n_rcred); 457 } 458 if (ap->a_mode & FWRITE) { 459 if (np->n_wcred) { 460 crfree(np->n_wcred); 461 } 462 np->n_wcred = ap->a_cred; 463 crhold(np->n_wcred); 464 } 465 466 #ifndef NFS_V2_ONLY 467 /* 468 * Get a valid lease. If cached data is stale, flush it. 469 */ 470 if (nmp->nm_flag & NFSMNT_NQNFS) { 471 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 472 do { 473 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 474 ap->a_p); 475 } while (error == NQNFS_EXPIRED); 476 if (error) 477 return (error); 478 if (np->n_lrev != np->n_brev || 479 (np->n_flag & NQNFSNONCACHE)) { 480 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 481 ap->a_p, 1)) == EINTR) 482 return (error); 483 np->n_brev = np->n_lrev; 484 } 485 } 486 } else 487 #endif 488 { 489 if (np->n_flag & NMODIFIED) { 490 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 491 ap->a_p, 1)) == EINTR) 492 return (error); 493 np->n_attrstamp = 0; 494 if (vp->v_type == VDIR) { 495 nfs_invaldircache(vp, 0); 496 np->n_direofoffset = 0; 497 } 498 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 499 if (error) 500 return (error); 501 np->n_mtime = vattr.va_mtime.tv_sec; 502 } else { 503 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 504 if (error) 505 return (error); 506 if (np->n_mtime != vattr.va_mtime.tv_sec) { 507 if (vp->v_type == VDIR) { 508 nfs_invaldircache(vp, 0); 509 np->n_direofoffset = 0; 510 } 511 if ((error = nfs_vinvalbuf(vp, V_SAVE, 512 ap->a_cred, ap->a_p, 1)) == EINTR) 513 return (error); 514 np->n_mtime = vattr.va_mtime.tv_sec; 515 } 516 } 517 } 518 519 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 520 np->n_attrstamp = 0; /* For Open/Close consistency */ 521 return (0); 522 } 523 524 /* 525 * nfs close vnode op 526 * What an NFS client should do upon close after writing is a debatable issue. 527 * Most NFS clients push delayed writes to the server upon close, basically for 528 * two reasons: 529 * 1 - So that any write errors may be reported back to the client process 530 * doing the close system call. By far the two most likely errors are 531 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 532 * 2 - To put a worst case upper bound on cache inconsistency between 533 * multiple clients for the file. 534 * There is also a consistency problem for Version 2 of the protocol w.r.t. 535 * not being able to tell if other clients are writing a file concurrently, 536 * since there is no way of knowing if the changed modify time in the reply 537 * is only due to the write for this client. 538 * (NFS Version 3 provides weak cache consistency data in the reply that 539 * should be sufficient to detect and handle this case.) 540 * 541 * The current code does the following: 542 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 543 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 544 * or commit them (this satisfies 1 and 2 except for the 545 * case where the server crashes after this close but 546 * before the commit RPC, which is felt to be "good 547 * enough". Changing the last argument to nfs_flush() to 548 * a 1 would force a commit operation, if it is felt a 549 * commit is necessary now. 550 * for NQNFS - do nothing now, since 2 is dealt with via leases and 551 * 1 should be dealt with via an fsync() system call for 552 * cases where write errors are important. 553 */ 554 /* ARGSUSED */ 555 int 556 nfs_close(v) 557 void *v; 558 { 559 struct vop_close_args /* { 560 struct vnodeop_desc *a_desc; 561 struct vnode *a_vp; 562 int a_fflag; 563 struct ucred *a_cred; 564 struct proc *a_p; 565 } */ *ap = v; 566 struct vnode *vp = ap->a_vp; 567 struct nfsnode *np = VTONFS(vp); 568 int error = 0; 569 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 570 571 if (vp->v_type == VREG) { 572 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 573 (np->n_flag & NMODIFIED)) { 574 if (NFS_ISV3(vp)) { 575 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 576 np->n_flag &= ~NMODIFIED; 577 } else 578 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 579 np->n_attrstamp = 0; 580 } 581 if (np->n_flag & NWRITEERR) { 582 np->n_flag &= ~NWRITEERR; 583 error = np->n_error; 584 } 585 } 586 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 587 return (error); 588 } 589 590 /* 591 * nfs getattr call from vfs. 592 */ 593 int 594 nfs_getattr(v) 595 void *v; 596 { 597 struct vop_getattr_args /* { 598 struct vnode *a_vp; 599 struct vattr *a_vap; 600 struct ucred *a_cred; 601 struct proc *a_p; 602 } */ *ap = v; 603 struct vnode *vp = ap->a_vp; 604 struct nfsnode *np = VTONFS(vp); 605 caddr_t cp; 606 u_int32_t *tl; 607 int32_t t1, t2; 608 caddr_t bpos, dpos; 609 int error = 0; 610 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 611 const int v3 = NFS_ISV3(vp); 612 613 /* 614 * Update local times for special files. 615 */ 616 if (np->n_flag & (NACC | NUPD)) 617 np->n_flag |= NCHG; 618 /* 619 * First look in the cache. 620 */ 621 if (nfs_getattrcache(vp, ap->a_vap) == 0) 622 return (0); 623 nfsstats.rpccnt[NFSPROC_GETATTR]++; 624 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 625 nfsm_fhtom(vp, v3); 626 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 627 if (!error) { 628 nfsm_loadattr(vp, ap->a_vap); 629 if (vp->v_type == VDIR && 630 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 631 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 632 } 633 nfsm_reqdone; 634 return (error); 635 } 636 637 /* 638 * nfs setattr call. 639 */ 640 int 641 nfs_setattr(v) 642 void *v; 643 { 644 struct vop_setattr_args /* { 645 struct vnodeop_desc *a_desc; 646 struct vnode *a_vp; 647 struct vattr *a_vap; 648 struct ucred *a_cred; 649 struct proc *a_p; 650 } */ *ap = v; 651 struct vnode *vp = ap->a_vp; 652 struct nfsnode *np = VTONFS(vp); 653 struct vattr *vap = ap->a_vap; 654 int error = 0; 655 u_quad_t tsize = 0; 656 657 /* 658 * Setting of flags is not supported. 659 */ 660 if (vap->va_flags != VNOVAL) 661 return (EOPNOTSUPP); 662 663 /* 664 * Disallow write attempts if the filesystem is mounted read-only. 665 */ 666 if ((vap->va_uid != (uid_t)VNOVAL || 667 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 668 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 669 (vp->v_mount->mnt_flag & MNT_RDONLY)) 670 return (EROFS); 671 if (vap->va_size != VNOVAL) { 672 switch (vp->v_type) { 673 case VDIR: 674 return (EISDIR); 675 case VCHR: 676 case VBLK: 677 case VSOCK: 678 case VFIFO: 679 if (vap->va_mtime.tv_sec == VNOVAL && 680 vap->va_atime.tv_sec == VNOVAL && 681 vap->va_mode == (mode_t)VNOVAL && 682 vap->va_uid == (uid_t)VNOVAL && 683 vap->va_gid == (gid_t)VNOVAL) 684 return (0); 685 vap->va_size = VNOVAL; 686 break; 687 default: 688 /* 689 * Disallow write attempts if the filesystem is 690 * mounted read-only. 691 */ 692 if (vp->v_mount->mnt_flag & MNT_RDONLY) 693 return (EROFS); 694 uvm_vnp_setsize(vp, vap->va_size); 695 if (vap->va_size == 0) 696 error = nfs_vinvalbuf(vp, 0, 697 ap->a_cred, ap->a_p, 1); 698 else 699 error = nfs_vinvalbuf(vp, V_SAVE, 700 ap->a_cred, ap->a_p, 1); 701 if (error) { 702 uvm_vnp_setsize(vp, np->n_size); 703 return (error); 704 } 705 tsize = np->n_size; 706 np->n_size = np->n_vattr->va_size = vap->va_size; 707 } 708 } else if ((vap->va_mtime.tv_sec != VNOVAL || 709 vap->va_atime.tv_sec != VNOVAL) && 710 vp->v_type == VREG && 711 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 712 ap->a_p, 1)) == EINTR) 713 return (error); 714 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 715 if (error && vap->va_size != VNOVAL) { 716 np->n_size = np->n_vattr->va_size = tsize; 717 uvm_vnp_setsize(vp, np->n_size); 718 } 719 return (error); 720 } 721 722 /* 723 * Do an nfs setattr rpc. 724 */ 725 int 726 nfs_setattrrpc(vp, vap, cred, procp) 727 struct vnode *vp; 728 struct vattr *vap; 729 struct ucred *cred; 730 struct proc *procp; 731 { 732 struct nfsv2_sattr *sp; 733 caddr_t cp; 734 int32_t t1, t2; 735 caddr_t bpos, dpos, cp2; 736 u_int32_t *tl; 737 int error = 0, wccflag = NFSV3_WCCRATTR; 738 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 739 const int v3 = NFS_ISV3(vp); 740 741 nfsstats.rpccnt[NFSPROC_SETATTR]++; 742 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 743 nfsm_fhtom(vp, v3); 744 if (v3) { 745 nfsm_v3attrbuild(vap, TRUE); 746 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 747 *tl = nfs_false; 748 } else { 749 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 750 if (vap->va_mode == (mode_t)VNOVAL) 751 sp->sa_mode = nfs_xdrneg1; 752 else 753 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 754 if (vap->va_uid == (uid_t)VNOVAL) 755 sp->sa_uid = nfs_xdrneg1; 756 else 757 sp->sa_uid = txdr_unsigned(vap->va_uid); 758 if (vap->va_gid == (gid_t)VNOVAL) 759 sp->sa_gid = nfs_xdrneg1; 760 else 761 sp->sa_gid = txdr_unsigned(vap->va_gid); 762 sp->sa_size = txdr_unsigned(vap->va_size); 763 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 764 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 765 } 766 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 767 if (v3) { 768 nfsm_wcc_data(vp, wccflag); 769 } else 770 nfsm_loadattr(vp, (struct vattr *)0); 771 nfsm_reqdone; 772 return (error); 773 } 774 775 /* 776 * nfs lookup call, one step at a time... 777 * First look in cache 778 * If not found, unlock the directory nfsnode and do the rpc 779 * 780 * This code is full of lock/unlock statements and checks, because 781 * we continue after cache_lookup has finished (we need to check 782 * with the attr cache and do an rpc if it has timed out). This means 783 * that the locking effects of cache_lookup have to be taken into 784 * account. 785 */ 786 int 787 nfs_lookup(v) 788 void *v; 789 { 790 struct vop_lookup_args /* { 791 struct vnodeop_desc *a_desc; 792 struct vnode *a_dvp; 793 struct vnode **a_vpp; 794 struct componentname *a_cnp; 795 } */ *ap = v; 796 struct componentname *cnp = ap->a_cnp; 797 struct vnode *dvp = ap->a_dvp; 798 struct vnode **vpp = ap->a_vpp; 799 int flags; 800 struct vnode *newvp; 801 u_int32_t *tl; 802 caddr_t cp; 803 int32_t t1, t2; 804 struct nfsmount *nmp; 805 caddr_t bpos, dpos, cp2; 806 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 807 long len; 808 nfsfh_t *fhp; 809 struct nfsnode *np; 810 int lockparent, wantparent, error = 0, attrflag, fhsize; 811 const int v3 = NFS_ISV3(dvp); 812 813 cnp->cn_flags &= ~PDIRUNLOCK; 814 flags = cnp->cn_flags; 815 816 *vpp = NULLVP; 817 newvp = NULLVP; 818 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 819 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 820 return (EROFS); 821 if (dvp->v_type != VDIR) 822 return (ENOTDIR); 823 824 lockparent = flags & LOCKPARENT; 825 wantparent = flags & (LOCKPARENT|WANTPARENT); 826 nmp = VFSTONFS(dvp->v_mount); 827 np = VTONFS(dvp); 828 829 /* 830 * Before tediously performing a linear scan of the directory, 831 * check the name cache to see if the directory/name pair 832 * we are looking for is known already. 833 * If the directory/name pair is found in the name cache, 834 * we have to ensure the directory has not changed from 835 * the time the cache entry has been created. If it has, 836 * the cache entry has to be ignored 837 */ 838 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 839 struct vattr vattr; 840 int err2; 841 842 if (error && error != ENOENT) { 843 *vpp = NULLVP; 844 return error; 845 } 846 847 if (cnp->cn_flags & PDIRUNLOCK) { 848 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 849 if (err2 != 0) { 850 *vpp = NULLVP; 851 return err2; 852 } 853 cnp->cn_flags &= ~PDIRUNLOCK; 854 } 855 856 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 857 if (err2 != 0) { 858 if (error == 0) { 859 if (*vpp != dvp) 860 vput(*vpp); 861 else 862 vrele(*vpp); 863 } 864 *vpp = NULLVP; 865 return err2; 866 } 867 868 if (error == ENOENT) { 869 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 870 cnp->cn_proc) && vattr.va_mtime.tv_sec == 871 VTONFS(dvp)->n_nctime) 872 return ENOENT; 873 cache_purge(dvp); 874 np->n_nctime = 0; 875 goto dorpc; 876 } 877 878 newvp = *vpp; 879 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 880 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 881 { 882 nfsstats.lookupcache_hits++; 883 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 884 cnp->cn_flags |= SAVENAME; 885 if ((!lockparent || !(flags & ISLASTCN)) && 886 newvp != dvp) 887 VOP_UNLOCK(dvp, 0); 888 return (0); 889 } 890 cache_purge(newvp); 891 if (newvp != dvp) 892 vput(newvp); 893 else 894 vrele(newvp); 895 *vpp = NULLVP; 896 } 897 dorpc: 898 error = 0; 899 newvp = NULLVP; 900 nfsstats.lookupcache_misses++; 901 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 902 len = cnp->cn_namelen; 903 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 904 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 905 nfsm_fhtom(dvp, v3); 906 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 907 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 908 if (error) { 909 nfsm_postop_attr(dvp, attrflag); 910 m_freem(mrep); 911 goto nfsmout; 912 } 913 nfsm_getfh(fhp, fhsize, v3); 914 915 /* 916 * Handle RENAME case... 917 */ 918 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 919 if (NFS_CMPFH(np, fhp, fhsize)) { 920 m_freem(mrep); 921 return (EISDIR); 922 } 923 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 924 if (error) { 925 m_freem(mrep); 926 return error; 927 } 928 newvp = NFSTOV(np); 929 if (v3) { 930 nfsm_postop_attr(newvp, attrflag); 931 nfsm_postop_attr(dvp, attrflag); 932 } else 933 nfsm_loadattr(newvp, (struct vattr *)0); 934 *vpp = newvp; 935 m_freem(mrep); 936 cnp->cn_flags |= SAVENAME; 937 if (!lockparent) { 938 VOP_UNLOCK(dvp, 0); 939 cnp->cn_flags |= PDIRUNLOCK; 940 } 941 return (0); 942 } 943 944 /* 945 * The postop attr handling is duplicated for each if case, 946 * because it should be done while dvp is locked (unlocking 947 * dvp is different for each case). 948 */ 949 950 if (NFS_CMPFH(np, fhp, fhsize)) { 951 /* 952 * "." lookup 953 */ 954 VREF(dvp); 955 newvp = dvp; 956 if (v3) { 957 nfsm_postop_attr(newvp, attrflag); 958 nfsm_postop_attr(dvp, attrflag); 959 } else 960 nfsm_loadattr(newvp, (struct vattr *)0); 961 } else if (flags & ISDOTDOT) { 962 /* 963 * ".." lookup 964 */ 965 VOP_UNLOCK(dvp, 0); 966 cnp->cn_flags |= PDIRUNLOCK; 967 968 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 969 if (error) { 970 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 971 cnp->cn_flags &= ~PDIRUNLOCK; 972 m_freem(mrep); 973 return error; 974 } 975 newvp = NFSTOV(np); 976 977 if (v3) { 978 nfsm_postop_attr(newvp, attrflag); 979 nfsm_postop_attr(dvp, attrflag); 980 } else 981 nfsm_loadattr(newvp, (struct vattr *)0); 982 983 if (lockparent && (flags & ISLASTCN)) { 984 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 985 m_freem(mrep); 986 vput(newvp); 987 return error; 988 } 989 cnp->cn_flags &= ~PDIRUNLOCK; 990 } 991 } else { 992 /* 993 * Other lookups. 994 */ 995 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 996 if (error) { 997 m_freem(mrep); 998 return error; 999 } 1000 newvp = NFSTOV(np); 1001 if (v3) { 1002 nfsm_postop_attr(newvp, attrflag); 1003 nfsm_postop_attr(dvp, attrflag); 1004 } else 1005 nfsm_loadattr(newvp, (struct vattr *)0); 1006 if (!lockparent || !(flags & ISLASTCN)) { 1007 VOP_UNLOCK(dvp, 0); 1008 cnp->cn_flags |= PDIRUNLOCK; 1009 } 1010 } 1011 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1012 cnp->cn_flags |= SAVENAME; 1013 if ((cnp->cn_flags & MAKEENTRY) && 1014 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1015 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1016 cache_enter(dvp, newvp, cnp); 1017 } 1018 *vpp = newvp; 1019 nfsm_reqdone; 1020 if (error) { 1021 /* 1022 * We get here only because of errors returned by 1023 * the RPC. Otherwise we'll have returned above 1024 * (the nfsm_* macros will jump to nfsm_reqdone 1025 * on error). 1026 */ 1027 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1028 cnp->cn_nameiop != CREATE) { 1029 if (VTONFS(dvp)->n_nctime == 0) 1030 VTONFS(dvp)->n_nctime = 1031 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1032 cache_enter(dvp, NULL, cnp); 1033 } 1034 if (newvp != NULLVP) { 1035 vrele(newvp); 1036 if (newvp != dvp) 1037 VOP_UNLOCK(newvp, 0); 1038 } 1039 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1040 (flags & ISLASTCN) && error == ENOENT) { 1041 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1042 error = EROFS; 1043 else 1044 error = EJUSTRETURN; 1045 } 1046 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1047 cnp->cn_flags |= SAVENAME; 1048 *vpp = NULL; 1049 } 1050 1051 return error; 1052 } 1053 1054 /* 1055 * nfs read call. 1056 * Just call nfs_bioread() to do the work. 1057 */ 1058 int 1059 nfs_read(v) 1060 void *v; 1061 { 1062 struct vop_read_args /* { 1063 struct vnode *a_vp; 1064 struct uio *a_uio; 1065 int a_ioflag; 1066 struct ucred *a_cred; 1067 } */ *ap = v; 1068 struct vnode *vp = ap->a_vp; 1069 1070 if (vp->v_type != VREG) 1071 return (EPERM); 1072 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1073 } 1074 1075 /* 1076 * nfs readlink call 1077 */ 1078 int 1079 nfs_readlink(v) 1080 void *v; 1081 { 1082 struct vop_readlink_args /* { 1083 struct vnode *a_vp; 1084 struct uio *a_uio; 1085 struct ucred *a_cred; 1086 } */ *ap = v; 1087 struct vnode *vp = ap->a_vp; 1088 1089 if (vp->v_type != VLNK) 1090 return (EPERM); 1091 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1092 } 1093 1094 /* 1095 * Do a readlink rpc. 1096 * Called by nfs_doio() from below the buffer cache. 1097 */ 1098 int 1099 nfs_readlinkrpc(vp, uiop, cred) 1100 struct vnode *vp; 1101 struct uio *uiop; 1102 struct ucred *cred; 1103 { 1104 u_int32_t *tl; 1105 caddr_t cp; 1106 int32_t t1, t2; 1107 caddr_t bpos, dpos, cp2; 1108 int error = 0, len, attrflag; 1109 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1110 const int v3 = NFS_ISV3(vp); 1111 1112 nfsstats.rpccnt[NFSPROC_READLINK]++; 1113 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1114 nfsm_fhtom(vp, v3); 1115 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1116 if (v3) 1117 nfsm_postop_attr(vp, attrflag); 1118 if (!error) { 1119 nfsm_strsiz(len, NFS_MAXPATHLEN); 1120 nfsm_mtouio(uiop, len); 1121 } 1122 nfsm_reqdone; 1123 return (error); 1124 } 1125 1126 /* 1127 * nfs read rpc call 1128 * Ditto above 1129 */ 1130 int 1131 nfs_readrpc(vp, uiop) 1132 struct vnode *vp; 1133 struct uio *uiop; 1134 { 1135 u_int32_t *tl; 1136 caddr_t cp; 1137 int32_t t1, t2; 1138 caddr_t bpos, dpos, cp2; 1139 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1140 struct nfsmount *nmp; 1141 int error = 0, len, retlen, tsiz, eof, attrflag; 1142 const int v3 = NFS_ISV3(vp); 1143 1144 #ifndef nolint 1145 eof = 0; 1146 #endif 1147 nmp = VFSTONFS(vp->v_mount); 1148 tsiz = uiop->uio_resid; 1149 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1150 return (EFBIG); 1151 while (tsiz > 0) { 1152 nfsstats.rpccnt[NFSPROC_READ]++; 1153 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1154 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1155 nfsm_fhtom(vp, v3); 1156 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1157 if (v3) { 1158 txdr_hyper(uiop->uio_offset, tl); 1159 *(tl + 2) = txdr_unsigned(len); 1160 } else { 1161 *tl++ = txdr_unsigned(uiop->uio_offset); 1162 *tl++ = txdr_unsigned(len); 1163 *tl = 0; 1164 } 1165 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1166 VTONFS(vp)->n_rcred); 1167 if (v3) { 1168 nfsm_postop_attr(vp, attrflag); 1169 if (error) { 1170 m_freem(mrep); 1171 goto nfsmout; 1172 } 1173 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1174 eof = fxdr_unsigned(int, *(tl + 1)); 1175 } else 1176 nfsm_loadattr(vp, (struct vattr *)0); 1177 nfsm_strsiz(retlen, nmp->nm_rsize); 1178 nfsm_mtouio(uiop, retlen); 1179 m_freem(mrep); 1180 tsiz -= retlen; 1181 if (v3) { 1182 if (eof || retlen == 0) 1183 tsiz = 0; 1184 } else if (retlen < len) 1185 tsiz = 0; 1186 } 1187 nfsmout: 1188 return (error); 1189 } 1190 1191 /* 1192 * nfs write call 1193 */ 1194 int 1195 nfs_writerpc(vp, uiop, iomode, must_commit) 1196 struct vnode *vp; 1197 struct uio *uiop; 1198 int *iomode, *must_commit; 1199 { 1200 u_int32_t *tl; 1201 caddr_t cp; 1202 int32_t t1, t2, backup; 1203 caddr_t bpos, dpos, cp2; 1204 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1205 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1206 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1207 const int v3 = NFS_ISV3(vp); 1208 int committed = NFSV3WRITE_FILESYNC; 1209 1210 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1211 panic("writerpc readonly vp %p", vp); 1212 } 1213 1214 #ifndef DIAGNOSTIC 1215 if (uiop->uio_iovcnt != 1) 1216 panic("nfs: writerpc iovcnt > 1"); 1217 #endif 1218 *must_commit = 0; 1219 tsiz = uiop->uio_resid; 1220 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1221 return (EFBIG); 1222 while (tsiz > 0) { 1223 nfsstats.rpccnt[NFSPROC_WRITE]++; 1224 len = min(tsiz, nmp->nm_wsize); 1225 nfsm_reqhead(vp, NFSPROC_WRITE, 1226 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1227 nfsm_fhtom(vp, v3); 1228 if (v3) { 1229 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1230 txdr_hyper(uiop->uio_offset, tl); 1231 tl += 2; 1232 *tl++ = txdr_unsigned(len); 1233 *tl++ = txdr_unsigned(*iomode); 1234 *tl = txdr_unsigned(len); 1235 } else { 1236 u_int32_t x; 1237 1238 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1239 /* Set both "begin" and "current" to non-garbage. */ 1240 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1241 *tl++ = x; /* "begin offset" */ 1242 *tl++ = x; /* "current offset" */ 1243 x = txdr_unsigned(len); 1244 *tl++ = x; /* total to this offset */ 1245 *tl = x; /* size of this write */ 1246 1247 } 1248 nfsm_uiotom(uiop, len); 1249 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1250 VTONFS(vp)->n_wcred); 1251 if (v3) { 1252 wccflag = NFSV3_WCCCHK; 1253 nfsm_wcc_data(vp, wccflag); 1254 if (!error) { 1255 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1256 + NFSX_V3WRITEVERF); 1257 rlen = fxdr_unsigned(int, *tl++); 1258 if (rlen == 0) { 1259 error = NFSERR_IO; 1260 m_freem(mrep); 1261 break; 1262 } else if (rlen < len) { 1263 backup = len - rlen; 1264 uiop->uio_iov->iov_base = 1265 (caddr_t)uiop->uio_iov->iov_base - 1266 backup; 1267 uiop->uio_iov->iov_len += backup; 1268 uiop->uio_offset -= backup; 1269 uiop->uio_resid += backup; 1270 len = rlen; 1271 } 1272 commit = fxdr_unsigned(int, *tl++); 1273 1274 /* 1275 * Return the lowest committment level 1276 * obtained by any of the RPCs. 1277 */ 1278 if (committed == NFSV3WRITE_FILESYNC) 1279 committed = commit; 1280 else if (committed == NFSV3WRITE_DATASYNC && 1281 commit == NFSV3WRITE_UNSTABLE) 1282 committed = commit; 1283 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1284 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1285 NFSX_V3WRITEVERF); 1286 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1287 } else if (memcmp((caddr_t)tl, 1288 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1289 *must_commit = 1; 1290 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1291 NFSX_V3WRITEVERF); 1292 } 1293 } 1294 } else 1295 nfsm_loadattr(vp, (struct vattr *)0); 1296 if (wccflag) 1297 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1298 m_freem(mrep); 1299 if (error) 1300 break; 1301 tsiz -= len; 1302 } 1303 nfsmout: 1304 *iomode = committed; 1305 if (error) 1306 uiop->uio_resid = tsiz; 1307 return (error); 1308 } 1309 1310 /* 1311 * nfs mknod rpc 1312 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1313 * mode set to specify the file type and the size field for rdev. 1314 */ 1315 int 1316 nfs_mknodrpc(dvp, vpp, cnp, vap) 1317 struct vnode *dvp; 1318 struct vnode **vpp; 1319 struct componentname *cnp; 1320 struct vattr *vap; 1321 { 1322 struct nfsv2_sattr *sp; 1323 u_int32_t *tl; 1324 caddr_t cp; 1325 int32_t t1, t2; 1326 struct vnode *newvp = (struct vnode *)0; 1327 struct nfsnode *np; 1328 char *cp2; 1329 caddr_t bpos, dpos; 1330 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1331 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1332 u_int32_t rdev; 1333 const int v3 = NFS_ISV3(dvp); 1334 1335 if (vap->va_type == VCHR || vap->va_type == VBLK) 1336 rdev = txdr_unsigned(vap->va_rdev); 1337 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1338 rdev = nfs_xdrneg1; 1339 else { 1340 VOP_ABORTOP(dvp, cnp); 1341 vput(dvp); 1342 return (EOPNOTSUPP); 1343 } 1344 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1345 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1346 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1347 nfsm_fhtom(dvp, v3); 1348 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1349 if (v3) { 1350 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1351 *tl++ = vtonfsv3_type(vap->va_type); 1352 nfsm_v3attrbuild(vap, FALSE); 1353 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1354 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1355 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1356 *tl = txdr_unsigned(minor(vap->va_rdev)); 1357 } 1358 } else { 1359 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1360 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1361 sp->sa_uid = nfs_xdrneg1; 1362 sp->sa_gid = nfs_xdrneg1; 1363 sp->sa_size = rdev; 1364 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1365 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1366 } 1367 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1368 if (!error) { 1369 nfsm_mtofh(dvp, newvp, v3, gotvp); 1370 if (!gotvp) { 1371 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1372 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1373 if (!error) 1374 newvp = NFSTOV(np); 1375 } 1376 } 1377 if (v3) 1378 nfsm_wcc_data(dvp, wccflag); 1379 nfsm_reqdone; 1380 if (error) { 1381 if (newvp) 1382 vput(newvp); 1383 } else { 1384 if (cnp->cn_flags & MAKEENTRY) 1385 cache_enter(dvp, newvp, cnp); 1386 *vpp = newvp; 1387 } 1388 PNBUF_PUT(cnp->cn_pnbuf); 1389 VTONFS(dvp)->n_flag |= NMODIFIED; 1390 if (!wccflag) 1391 VTONFS(dvp)->n_attrstamp = 0; 1392 vput(dvp); 1393 return (error); 1394 } 1395 1396 /* 1397 * nfs mknod vop 1398 * just call nfs_mknodrpc() to do the work. 1399 */ 1400 /* ARGSUSED */ 1401 int 1402 nfs_mknod(v) 1403 void *v; 1404 { 1405 struct vop_mknod_args /* { 1406 struct vnode *a_dvp; 1407 struct vnode **a_vpp; 1408 struct componentname *a_cnp; 1409 struct vattr *a_vap; 1410 } */ *ap = v; 1411 int error; 1412 1413 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1414 return (error); 1415 } 1416 1417 static u_long create_verf; 1418 /* 1419 * nfs file create call 1420 */ 1421 int 1422 nfs_create(v) 1423 void *v; 1424 { 1425 struct vop_create_args /* { 1426 struct vnode *a_dvp; 1427 struct vnode **a_vpp; 1428 struct componentname *a_cnp; 1429 struct vattr *a_vap; 1430 } */ *ap = v; 1431 struct vnode *dvp = ap->a_dvp; 1432 struct vattr *vap = ap->a_vap; 1433 struct componentname *cnp = ap->a_cnp; 1434 struct nfsv2_sattr *sp; 1435 u_int32_t *tl; 1436 caddr_t cp; 1437 int32_t t1, t2; 1438 struct nfsnode *np = (struct nfsnode *)0; 1439 struct vnode *newvp = (struct vnode *)0; 1440 caddr_t bpos, dpos, cp2; 1441 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1442 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1443 const int v3 = NFS_ISV3(dvp); 1444 1445 /* 1446 * Oops, not for me.. 1447 */ 1448 if (vap->va_type == VSOCK) 1449 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1450 1451 #ifdef VA_EXCLUSIVE 1452 if (vap->va_vaflags & VA_EXCLUSIVE) 1453 fmode |= O_EXCL; 1454 #endif 1455 again: 1456 error = 0; 1457 nfsstats.rpccnt[NFSPROC_CREATE]++; 1458 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1459 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1460 nfsm_fhtom(dvp, v3); 1461 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1462 if (v3) { 1463 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1464 if (fmode & O_EXCL) { 1465 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1466 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1467 #ifdef INET 1468 if (in_ifaddr.tqh_first) 1469 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1470 else 1471 *tl++ = create_verf; 1472 #else 1473 *tl++ = create_verf; 1474 #endif 1475 *tl = ++create_verf; 1476 } else { 1477 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1478 nfsm_v3attrbuild(vap, FALSE); 1479 } 1480 } else { 1481 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1482 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1483 sp->sa_uid = nfs_xdrneg1; 1484 sp->sa_gid = nfs_xdrneg1; 1485 sp->sa_size = 0; 1486 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1487 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1488 } 1489 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1490 if (!error) { 1491 nfsm_mtofh(dvp, newvp, v3, gotvp); 1492 if (!gotvp) { 1493 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1494 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1495 if (!error) 1496 newvp = NFSTOV(np); 1497 } 1498 } 1499 if (v3) 1500 nfsm_wcc_data(dvp, wccflag); 1501 nfsm_reqdone; 1502 if (error) { 1503 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1504 fmode &= ~O_EXCL; 1505 goto again; 1506 } 1507 if (newvp) 1508 vput(newvp); 1509 } else if (v3 && (fmode & O_EXCL)) 1510 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1511 if (!error) { 1512 if (cnp->cn_flags & MAKEENTRY) 1513 cache_enter(dvp, newvp, cnp); 1514 *ap->a_vpp = newvp; 1515 } 1516 PNBUF_PUT(cnp->cn_pnbuf); 1517 VTONFS(dvp)->n_flag |= NMODIFIED; 1518 if (!wccflag) 1519 VTONFS(dvp)->n_attrstamp = 0; 1520 vput(dvp); 1521 return (error); 1522 } 1523 1524 /* 1525 * nfs file remove call 1526 * To try and make nfs semantics closer to ufs semantics, a file that has 1527 * other processes using the vnode is renamed instead of removed and then 1528 * removed later on the last close. 1529 * - If v_usecount > 1 1530 * If a rename is not already in the works 1531 * call nfs_sillyrename() to set it up 1532 * else 1533 * do the remove rpc 1534 */ 1535 int 1536 nfs_remove(v) 1537 void *v; 1538 { 1539 struct vop_remove_args /* { 1540 struct vnodeop_desc *a_desc; 1541 struct vnode * a_dvp; 1542 struct vnode * a_vp; 1543 struct componentname * a_cnp; 1544 } */ *ap = v; 1545 struct vnode *vp = ap->a_vp; 1546 struct vnode *dvp = ap->a_dvp; 1547 struct componentname *cnp = ap->a_cnp; 1548 struct nfsnode *np = VTONFS(vp); 1549 int error = 0; 1550 struct vattr vattr; 1551 1552 #ifndef DIAGNOSTIC 1553 if ((cnp->cn_flags & HASBUF) == 0) 1554 panic("nfs_remove: no name"); 1555 if (vp->v_usecount < 1) 1556 panic("nfs_remove: bad v_usecount"); 1557 #endif 1558 if (vp->v_type == VDIR) 1559 error = EPERM; 1560 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1561 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1562 vattr.va_nlink > 1)) { 1563 /* 1564 * Purge the name cache so that the chance of a lookup for 1565 * the name succeeding while the remove is in progress is 1566 * minimized. Without node locking it can still happen, such 1567 * that an I/O op returns ESTALE, but since you get this if 1568 * another host removes the file.. 1569 */ 1570 cache_purge(vp); 1571 /* 1572 * throw away biocache buffers, mainly to avoid 1573 * unnecessary delayed writes later. 1574 */ 1575 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1576 /* Do the rpc */ 1577 if (error != EINTR) 1578 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1579 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1580 /* 1581 * Kludge City: If the first reply to the remove rpc is lost.. 1582 * the reply to the retransmitted request will be ENOENT 1583 * since the file was in fact removed 1584 * Therefore, we cheat and return success. 1585 */ 1586 if (error == ENOENT) 1587 error = 0; 1588 } else if (!np->n_sillyrename) 1589 error = nfs_sillyrename(dvp, vp, cnp); 1590 PNBUF_PUT(cnp->cn_pnbuf); 1591 np->n_attrstamp = 0; 1592 vput(dvp); 1593 vput(vp); 1594 return (error); 1595 } 1596 1597 /* 1598 * nfs file remove rpc called from nfs_inactive 1599 */ 1600 int 1601 nfs_removeit(sp) 1602 struct sillyrename *sp; 1603 { 1604 1605 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1606 (struct proc *)0)); 1607 } 1608 1609 /* 1610 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1611 */ 1612 int 1613 nfs_removerpc(dvp, name, namelen, cred, proc) 1614 struct vnode *dvp; 1615 const char *name; 1616 int namelen; 1617 struct ucred *cred; 1618 struct proc *proc; 1619 { 1620 u_int32_t *tl; 1621 caddr_t cp; 1622 int32_t t1, t2; 1623 caddr_t bpos, dpos, cp2; 1624 int error = 0, wccflag = NFSV3_WCCRATTR; 1625 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1626 const int v3 = NFS_ISV3(dvp); 1627 1628 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1629 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1630 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1631 nfsm_fhtom(dvp, v3); 1632 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1633 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1634 if (v3) 1635 nfsm_wcc_data(dvp, wccflag); 1636 nfsm_reqdone; 1637 VTONFS(dvp)->n_flag |= NMODIFIED; 1638 if (!wccflag) 1639 VTONFS(dvp)->n_attrstamp = 0; 1640 return (error); 1641 } 1642 1643 /* 1644 * nfs file rename call 1645 */ 1646 int 1647 nfs_rename(v) 1648 void *v; 1649 { 1650 struct vop_rename_args /* { 1651 struct vnode *a_fdvp; 1652 struct vnode *a_fvp; 1653 struct componentname *a_fcnp; 1654 struct vnode *a_tdvp; 1655 struct vnode *a_tvp; 1656 struct componentname *a_tcnp; 1657 } */ *ap = v; 1658 struct vnode *fvp = ap->a_fvp; 1659 struct vnode *tvp = ap->a_tvp; 1660 struct vnode *fdvp = ap->a_fdvp; 1661 struct vnode *tdvp = ap->a_tdvp; 1662 struct componentname *tcnp = ap->a_tcnp; 1663 struct componentname *fcnp = ap->a_fcnp; 1664 int error; 1665 1666 #ifndef DIAGNOSTIC 1667 if ((tcnp->cn_flags & HASBUF) == 0 || 1668 (fcnp->cn_flags & HASBUF) == 0) 1669 panic("nfs_rename: no name"); 1670 #endif 1671 /* Check for cross-device rename */ 1672 if ((fvp->v_mount != tdvp->v_mount) || 1673 (tvp && (fvp->v_mount != tvp->v_mount))) { 1674 error = EXDEV; 1675 goto out; 1676 } 1677 1678 /* 1679 * If the tvp exists and is in use, sillyrename it before doing the 1680 * rename of the new file over it. 1681 */ 1682 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1683 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1684 vput(tvp); 1685 tvp = NULL; 1686 } 1687 1688 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1689 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1690 tcnp->cn_proc); 1691 1692 if (fvp->v_type == VDIR) { 1693 if (tvp != NULL && tvp->v_type == VDIR) 1694 cache_purge(tdvp); 1695 cache_purge(fdvp); 1696 } 1697 out: 1698 if (tdvp == tvp) 1699 vrele(tdvp); 1700 else 1701 vput(tdvp); 1702 if (tvp) 1703 vput(tvp); 1704 vrele(fdvp); 1705 vrele(fvp); 1706 /* 1707 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1708 */ 1709 if (error == ENOENT) 1710 error = 0; 1711 return (error); 1712 } 1713 1714 /* 1715 * nfs file rename rpc called from nfs_remove() above 1716 */ 1717 int 1718 nfs_renameit(sdvp, scnp, sp) 1719 struct vnode *sdvp; 1720 struct componentname *scnp; 1721 struct sillyrename *sp; 1722 { 1723 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1724 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1725 } 1726 1727 /* 1728 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1729 */ 1730 int 1731 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1732 struct vnode *fdvp; 1733 const char *fnameptr; 1734 int fnamelen; 1735 struct vnode *tdvp; 1736 const char *tnameptr; 1737 int tnamelen; 1738 struct ucred *cred; 1739 struct proc *proc; 1740 { 1741 u_int32_t *tl; 1742 caddr_t cp; 1743 int32_t t1, t2; 1744 caddr_t bpos, dpos, cp2; 1745 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1746 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1747 const int v3 = NFS_ISV3(fdvp); 1748 1749 nfsstats.rpccnt[NFSPROC_RENAME]++; 1750 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1751 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1752 nfsm_rndup(tnamelen)); 1753 nfsm_fhtom(fdvp, v3); 1754 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1755 nfsm_fhtom(tdvp, v3); 1756 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1757 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1758 if (v3) { 1759 nfsm_wcc_data(fdvp, fwccflag); 1760 nfsm_wcc_data(tdvp, twccflag); 1761 } 1762 nfsm_reqdone; 1763 VTONFS(fdvp)->n_flag |= NMODIFIED; 1764 VTONFS(tdvp)->n_flag |= NMODIFIED; 1765 if (!fwccflag) 1766 VTONFS(fdvp)->n_attrstamp = 0; 1767 if (!twccflag) 1768 VTONFS(tdvp)->n_attrstamp = 0; 1769 return (error); 1770 } 1771 1772 /* 1773 * nfs hard link create call 1774 */ 1775 int 1776 nfs_link(v) 1777 void *v; 1778 { 1779 struct vop_link_args /* { 1780 struct vnode *a_dvp; 1781 struct vnode *a_vp; 1782 struct componentname *a_cnp; 1783 } */ *ap = v; 1784 struct vnode *vp = ap->a_vp; 1785 struct vnode *dvp = ap->a_dvp; 1786 struct componentname *cnp = ap->a_cnp; 1787 u_int32_t *tl; 1788 caddr_t cp; 1789 int32_t t1, t2; 1790 caddr_t bpos, dpos, cp2; 1791 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1792 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1793 /* XXX Should be const and initialised? */ 1794 int v3; 1795 1796 if (dvp->v_mount != vp->v_mount) { 1797 VOP_ABORTOP(vp, cnp); 1798 vput(dvp); 1799 return (EXDEV); 1800 } 1801 if (dvp != vp) { 1802 error = vn_lock(vp, LK_EXCLUSIVE); 1803 if (error != 0) { 1804 VOP_ABORTOP(dvp, cnp); 1805 vput(dvp); 1806 return error; 1807 } 1808 } 1809 1810 /* 1811 * Push all writes to the server, so that the attribute cache 1812 * doesn't get "out of sync" with the server. 1813 * XXX There should be a better way! 1814 */ 1815 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1816 1817 v3 = NFS_ISV3(vp); 1818 nfsstats.rpccnt[NFSPROC_LINK]++; 1819 nfsm_reqhead(vp, NFSPROC_LINK, 1820 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1821 nfsm_fhtom(vp, v3); 1822 nfsm_fhtom(dvp, v3); 1823 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1824 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1825 if (v3) { 1826 nfsm_postop_attr(vp, attrflag); 1827 nfsm_wcc_data(dvp, wccflag); 1828 } 1829 nfsm_reqdone; 1830 PNBUF_PUT(cnp->cn_pnbuf); 1831 VTONFS(dvp)->n_flag |= NMODIFIED; 1832 if (!attrflag) 1833 VTONFS(vp)->n_attrstamp = 0; 1834 if (!wccflag) 1835 VTONFS(dvp)->n_attrstamp = 0; 1836 if (dvp != vp) 1837 VOP_UNLOCK(vp, 0); 1838 vput(dvp); 1839 /* 1840 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1841 */ 1842 if (error == EEXIST) 1843 error = 0; 1844 return (error); 1845 } 1846 1847 /* 1848 * nfs symbolic link create call 1849 */ 1850 int 1851 nfs_symlink(v) 1852 void *v; 1853 { 1854 struct vop_symlink_args /* { 1855 struct vnode *a_dvp; 1856 struct vnode **a_vpp; 1857 struct componentname *a_cnp; 1858 struct vattr *a_vap; 1859 char *a_target; 1860 } */ *ap = v; 1861 struct vnode *dvp = ap->a_dvp; 1862 struct vattr *vap = ap->a_vap; 1863 struct componentname *cnp = ap->a_cnp; 1864 struct nfsv2_sattr *sp; 1865 u_int32_t *tl; 1866 caddr_t cp; 1867 int32_t t1, t2; 1868 caddr_t bpos, dpos, cp2; 1869 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1870 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1871 struct vnode *newvp = (struct vnode *)0; 1872 const int v3 = NFS_ISV3(dvp); 1873 1874 *ap->a_vpp = NULL; 1875 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1876 slen = strlen(ap->a_target); 1877 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1878 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1879 nfsm_fhtom(dvp, v3); 1880 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1881 if (v3) 1882 nfsm_v3attrbuild(vap, FALSE); 1883 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1884 if (!v3) { 1885 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1886 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1887 sp->sa_uid = nfs_xdrneg1; 1888 sp->sa_gid = nfs_xdrneg1; 1889 sp->sa_size = nfs_xdrneg1; 1890 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1891 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1892 } 1893 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1894 if (v3) { 1895 if (!error) 1896 nfsm_mtofh(dvp, newvp, v3, gotvp); 1897 nfsm_wcc_data(dvp, wccflag); 1898 } 1899 nfsm_reqdone; 1900 /* 1901 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1902 */ 1903 if (error == EEXIST) 1904 error = 0; 1905 if (error == 0 && newvp == NULL) { 1906 struct nfsnode *np = NULL; 1907 1908 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1909 cnp->cn_cred, cnp->cn_proc, &np); 1910 if (error == 0) 1911 newvp = NFSTOV(np); 1912 } 1913 if (error) { 1914 if (newvp != NULL) 1915 vput(newvp); 1916 } else { 1917 *ap->a_vpp = newvp; 1918 } 1919 PNBUF_PUT(cnp->cn_pnbuf); 1920 VTONFS(dvp)->n_flag |= NMODIFIED; 1921 if (!wccflag) 1922 VTONFS(dvp)->n_attrstamp = 0; 1923 vput(dvp); 1924 return (error); 1925 } 1926 1927 /* 1928 * nfs make dir call 1929 */ 1930 int 1931 nfs_mkdir(v) 1932 void *v; 1933 { 1934 struct vop_mkdir_args /* { 1935 struct vnode *a_dvp; 1936 struct vnode **a_vpp; 1937 struct componentname *a_cnp; 1938 struct vattr *a_vap; 1939 } */ *ap = v; 1940 struct vnode *dvp = ap->a_dvp; 1941 struct vattr *vap = ap->a_vap; 1942 struct componentname *cnp = ap->a_cnp; 1943 struct nfsv2_sattr *sp; 1944 u_int32_t *tl; 1945 caddr_t cp; 1946 int32_t t1, t2; 1947 int len; 1948 struct nfsnode *np = (struct nfsnode *)0; 1949 struct vnode *newvp = (struct vnode *)0; 1950 caddr_t bpos, dpos, cp2; 1951 int error = 0, wccflag = NFSV3_WCCRATTR; 1952 int gotvp = 0; 1953 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1954 const int v3 = NFS_ISV3(dvp); 1955 1956 len = cnp->cn_namelen; 1957 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1958 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1959 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1960 nfsm_fhtom(dvp, v3); 1961 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1962 if (v3) { 1963 nfsm_v3attrbuild(vap, FALSE); 1964 } else { 1965 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1966 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1967 sp->sa_uid = nfs_xdrneg1; 1968 sp->sa_gid = nfs_xdrneg1; 1969 sp->sa_size = nfs_xdrneg1; 1970 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1971 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1972 } 1973 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1974 if (!error) 1975 nfsm_mtofh(dvp, newvp, v3, gotvp); 1976 if (v3) 1977 nfsm_wcc_data(dvp, wccflag); 1978 nfsm_reqdone; 1979 VTONFS(dvp)->n_flag |= NMODIFIED; 1980 if (!wccflag) 1981 VTONFS(dvp)->n_attrstamp = 0; 1982 /* 1983 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1984 * if we can succeed in looking up the directory. 1985 */ 1986 if (error == EEXIST || (!error && !gotvp)) { 1987 if (newvp) { 1988 vput(newvp); 1989 newvp = (struct vnode *)0; 1990 } 1991 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1992 cnp->cn_proc, &np); 1993 if (!error) { 1994 newvp = NFSTOV(np); 1995 if (newvp->v_type != VDIR) 1996 error = EEXIST; 1997 } 1998 } 1999 if (error) { 2000 if (newvp) 2001 vput(newvp); 2002 } else { 2003 if (cnp->cn_flags & MAKEENTRY) 2004 cache_enter(dvp, newvp, cnp); 2005 *ap->a_vpp = newvp; 2006 } 2007 PNBUF_PUT(cnp->cn_pnbuf); 2008 vput(dvp); 2009 return (error); 2010 } 2011 2012 /* 2013 * nfs remove directory call 2014 */ 2015 int 2016 nfs_rmdir(v) 2017 void *v; 2018 { 2019 struct vop_rmdir_args /* { 2020 struct vnode *a_dvp; 2021 struct vnode *a_vp; 2022 struct componentname *a_cnp; 2023 } */ *ap = v; 2024 struct vnode *vp = ap->a_vp; 2025 struct vnode *dvp = ap->a_dvp; 2026 struct componentname *cnp = ap->a_cnp; 2027 u_int32_t *tl; 2028 caddr_t cp; 2029 int32_t t1, t2; 2030 caddr_t bpos, dpos, cp2; 2031 int error = 0, wccflag = NFSV3_WCCRATTR; 2032 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2033 const int v3 = NFS_ISV3(dvp); 2034 2035 if (dvp == vp) { 2036 vrele(dvp); 2037 vput(dvp); 2038 PNBUF_PUT(cnp->cn_pnbuf); 2039 return (EINVAL); 2040 } 2041 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2042 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2043 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2044 nfsm_fhtom(dvp, v3); 2045 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2046 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2047 if (v3) 2048 nfsm_wcc_data(dvp, wccflag); 2049 nfsm_reqdone; 2050 PNBUF_PUT(cnp->cn_pnbuf); 2051 VTONFS(dvp)->n_flag |= NMODIFIED; 2052 if (!wccflag) 2053 VTONFS(dvp)->n_attrstamp = 0; 2054 cache_purge(dvp); 2055 cache_purge(vp); 2056 vput(vp); 2057 vput(dvp); 2058 /* 2059 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2060 */ 2061 if (error == ENOENT) 2062 error = 0; 2063 return (error); 2064 } 2065 2066 /* 2067 * nfs readdir call 2068 */ 2069 int 2070 nfs_readdir(v) 2071 void *v; 2072 { 2073 struct vop_readdir_args /* { 2074 struct vnode *a_vp; 2075 struct uio *a_uio; 2076 struct ucred *a_cred; 2077 int *a_eofflag; 2078 off_t **a_cookies; 2079 int *a_ncookies; 2080 } */ *ap = v; 2081 struct vnode *vp = ap->a_vp; 2082 struct uio *uio = ap->a_uio; 2083 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2084 char *base = uio->uio_iov->iov_base; 2085 int tresid, error; 2086 size_t count, lost; 2087 struct dirent *dp; 2088 off_t *cookies = NULL; 2089 int ncookies = 0, nc; 2090 2091 if (vp->v_type != VDIR) 2092 return (EPERM); 2093 2094 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2095 count = uio->uio_resid - lost; 2096 if (count <= 0) 2097 return (EINVAL); 2098 2099 /* 2100 * Call nfs_bioread() to do the real work. 2101 */ 2102 tresid = uio->uio_resid = count; 2103 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2104 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2105 2106 if (!error && ap->a_cookies) { 2107 ncookies = count / 16; 2108 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2109 *ap->a_cookies = cookies; 2110 } 2111 2112 if (!error && uio->uio_resid == tresid) { 2113 uio->uio_resid += lost; 2114 nfsstats.direofcache_misses++; 2115 if (ap->a_cookies) 2116 *ap->a_ncookies = 0; 2117 *ap->a_eofflag = 1; 2118 return (0); 2119 } 2120 2121 if (!error && ap->a_cookies) { 2122 /* 2123 * Only the NFS server and emulations use cookies, and they 2124 * load the directory block into system space, so we can 2125 * just look at it directly. 2126 */ 2127 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2128 panic("nfs_readdir: lost in space"); 2129 for (nc = 0; ncookies-- && 2130 base < (char *)uio->uio_iov->iov_base; nc++){ 2131 dp = (struct dirent *) base; 2132 if (dp->d_reclen == 0) 2133 break; 2134 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2135 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2136 else 2137 *(cookies++) = NFS_GETCOOKIE(dp); 2138 base += dp->d_reclen; 2139 } 2140 uio->uio_resid += 2141 ((caddr_t)uio->uio_iov->iov_base - base); 2142 uio->uio_iov->iov_len += 2143 ((caddr_t)uio->uio_iov->iov_base - base); 2144 uio->uio_iov->iov_base = base; 2145 *ap->a_ncookies = nc; 2146 } 2147 2148 uio->uio_resid += lost; 2149 *ap->a_eofflag = 0; 2150 return (error); 2151 } 2152 2153 /* 2154 * Readdir rpc call. 2155 * Called from below the buffer cache by nfs_doio(). 2156 */ 2157 int 2158 nfs_readdirrpc(vp, uiop, cred) 2159 struct vnode *vp; 2160 struct uio *uiop; 2161 struct ucred *cred; 2162 { 2163 int len, left; 2164 struct dirent *dp = NULL; 2165 u_int32_t *tl; 2166 caddr_t cp; 2167 int32_t t1, t2; 2168 caddr_t bpos, dpos, cp2; 2169 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2170 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2171 struct nfsnode *dnp = VTONFS(vp); 2172 u_quad_t fileno; 2173 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2174 int attrflag, nrpcs = 0, reclen; 2175 const int v3 = NFS_ISV3(vp); 2176 nfsquad_t cookie; 2177 2178 #ifdef DIAGNOSTIC 2179 /* 2180 * Should be called from buffer cache, so only amount of 2181 * NFS_DIRBLKSIZ will be requested. 2182 */ 2183 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2184 panic("nfs readdirrpc bad uio"); 2185 #endif 2186 2187 /* 2188 * Loop around doing readdir rpc's of size nm_readdirsize 2189 * truncated to a multiple of NFS_DIRFRAGSIZ. 2190 * The stopping criteria is EOF or buffer full. 2191 */ 2192 while (more_dirs && bigenough) { 2193 /* 2194 * Heuristic: don't bother to do another RPC to further 2195 * fill up this block if there is not much room left. (< 50% 2196 * of the readdir RPC size). This wastes some buffer space 2197 * but can save up to 50% in RPC calls. 2198 */ 2199 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2200 bigenough = 0; 2201 break; 2202 } 2203 nfsstats.rpccnt[NFSPROC_READDIR]++; 2204 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2205 NFSX_READDIR(v3)); 2206 nfsm_fhtom(vp, v3); 2207 if (v3) { 2208 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2209 cookie.qval = uiop->uio_offset; 2210 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2211 txdr_swapcookie3(uiop->uio_offset, tl); 2212 } else { 2213 txdr_cookie3(uiop->uio_offset, tl); 2214 } 2215 tl += 2; 2216 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2217 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2218 } else { 2219 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2220 *tl++ = txdr_unsigned(uiop->uio_offset); 2221 } 2222 *tl = txdr_unsigned(nmp->nm_readdirsize); 2223 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2224 nrpcs++; 2225 if (v3) { 2226 nfsm_postop_attr(vp, attrflag); 2227 if (!error) { 2228 nfsm_dissect(tl, u_int32_t *, 2229 2 * NFSX_UNSIGNED); 2230 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2231 dnp->n_cookieverf.nfsuquad[1] = *tl; 2232 } else { 2233 m_freem(mrep); 2234 goto nfsmout; 2235 } 2236 } 2237 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2238 more_dirs = fxdr_unsigned(int, *tl); 2239 2240 /* loop thru the dir entries, doctoring them to 4bsd form */ 2241 while (more_dirs && bigenough) { 2242 if (v3) { 2243 nfsm_dissect(tl, u_int32_t *, 2244 3 * NFSX_UNSIGNED); 2245 fileno = fxdr_hyper(tl); 2246 len = fxdr_unsigned(int, *(tl + 2)); 2247 } else { 2248 nfsm_dissect(tl, u_int32_t *, 2249 2 * NFSX_UNSIGNED); 2250 fileno = fxdr_unsigned(u_quad_t, *tl++); 2251 len = fxdr_unsigned(int, *tl); 2252 } 2253 if (len <= 0 || len > NFS_MAXNAMLEN) { 2254 error = EBADRPC; 2255 m_freem(mrep); 2256 goto nfsmout; 2257 } 2258 tlen = nfsm_rndup(len); 2259 if (tlen == len) 2260 tlen += 4; /* To ensure null termination */ 2261 tlen += sizeof (off_t) + sizeof (int); 2262 reclen = ALIGN(tlen + DIRHDSIZ); 2263 tlen = reclen - DIRHDSIZ; 2264 left = NFS_DIRFRAGSIZ - blksiz; 2265 if (reclen > left) { 2266 dp->d_reclen += left; 2267 uiop->uio_iov->iov_base = 2268 (caddr_t)uiop->uio_iov->iov_base + left; 2269 uiop->uio_iov->iov_len -= left; 2270 uiop->uio_resid -= left; 2271 blksiz = 0; 2272 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2273 } 2274 if (reclen > uiop->uio_resid) 2275 bigenough = 0; 2276 if (bigenough) { 2277 dp = (struct dirent *)uiop->uio_iov->iov_base; 2278 dp->d_fileno = (int)fileno; 2279 dp->d_namlen = len; 2280 dp->d_reclen = reclen; 2281 dp->d_type = DT_UNKNOWN; 2282 blksiz += dp->d_reclen; 2283 if (blksiz == NFS_DIRFRAGSIZ) 2284 blksiz = 0; 2285 uiop->uio_resid -= DIRHDSIZ; 2286 uiop->uio_iov->iov_base = 2287 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2288 uiop->uio_iov->iov_len -= DIRHDSIZ; 2289 nfsm_mtouio(uiop, len); 2290 cp = uiop->uio_iov->iov_base; 2291 tlen -= len; 2292 *cp = '\0'; /* null terminate */ 2293 uiop->uio_iov->iov_base = 2294 (caddr_t)uiop->uio_iov->iov_base + tlen; 2295 uiop->uio_iov->iov_len -= tlen; 2296 uiop->uio_resid -= tlen; 2297 } else 2298 nfsm_adv(nfsm_rndup(len)); 2299 if (v3) { 2300 nfsm_dissect(tl, u_int32_t *, 2301 3 * NFSX_UNSIGNED); 2302 } else { 2303 nfsm_dissect(tl, u_int32_t *, 2304 2 * NFSX_UNSIGNED); 2305 } 2306 if (bigenough) { 2307 if (v3) { 2308 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2309 uiop->uio_offset = 2310 fxdr_swapcookie3(tl); 2311 else 2312 uiop->uio_offset = 2313 fxdr_cookie3(tl); 2314 } 2315 else { 2316 uiop->uio_offset = 2317 fxdr_unsigned(off_t, *tl); 2318 } 2319 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2320 } 2321 if (v3) 2322 tl += 2; 2323 else 2324 tl++; 2325 more_dirs = fxdr_unsigned(int, *tl); 2326 } 2327 /* 2328 * If at end of rpc data, get the eof boolean 2329 */ 2330 if (!more_dirs) { 2331 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2332 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2333 } 2334 m_freem(mrep); 2335 } 2336 /* 2337 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2338 * by increasing d_reclen for the last record. 2339 */ 2340 if (blksiz > 0) { 2341 left = NFS_DIRFRAGSIZ - blksiz; 2342 dp->d_reclen += left; 2343 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2344 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2345 left; 2346 uiop->uio_iov->iov_len -= left; 2347 uiop->uio_resid -= left; 2348 } 2349 2350 /* 2351 * We are now either at the end of the directory or have filled the 2352 * block. 2353 */ 2354 if (bigenough) 2355 dnp->n_direofoffset = uiop->uio_offset; 2356 nfsmout: 2357 return (error); 2358 } 2359 2360 /* 2361 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2362 */ 2363 int 2364 nfs_readdirplusrpc(vp, uiop, cred) 2365 struct vnode *vp; 2366 struct uio *uiop; 2367 struct ucred *cred; 2368 { 2369 int len, left; 2370 struct dirent *dp = NULL; 2371 u_int32_t *tl; 2372 caddr_t cp; 2373 int32_t t1, t2; 2374 struct vnode *newvp; 2375 caddr_t bpos, dpos, cp2; 2376 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2377 struct nameidata nami, *ndp = &nami; 2378 struct componentname *cnp = &ndp->ni_cnd; 2379 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2380 struct nfsnode *dnp = VTONFS(vp), *np; 2381 const unsigned char *hcp; 2382 nfsfh_t *fhp; 2383 u_quad_t fileno; 2384 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2385 int attrflag, fhsize, nrpcs = 0, reclen; 2386 struct nfs_fattr fattr, *fp; 2387 2388 #ifdef DIAGNOSTIC 2389 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2390 panic("nfs readdirplusrpc bad uio"); 2391 #endif 2392 ndp->ni_dvp = vp; 2393 newvp = NULLVP; 2394 2395 /* 2396 * Loop around doing readdir rpc's of size nm_readdirsize 2397 * truncated to a multiple of NFS_DIRFRAGSIZ. 2398 * The stopping criteria is EOF or buffer full. 2399 */ 2400 while (more_dirs && bigenough) { 2401 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2402 bigenough = 0; 2403 break; 2404 } 2405 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2406 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2407 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2408 nfsm_fhtom(vp, 1); 2409 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2410 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2411 txdr_swapcookie3(uiop->uio_offset, tl); 2412 } else { 2413 txdr_cookie3(uiop->uio_offset, tl); 2414 } 2415 tl += 2; 2416 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2417 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2418 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2419 *tl = txdr_unsigned(nmp->nm_rsize); 2420 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2421 nfsm_postop_attr(vp, attrflag); 2422 if (error) { 2423 m_freem(mrep); 2424 goto nfsmout; 2425 } 2426 nrpcs++; 2427 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2428 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2429 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2430 more_dirs = fxdr_unsigned(int, *tl); 2431 2432 /* loop thru the dir entries, doctoring them to 4bsd form */ 2433 while (more_dirs && bigenough) { 2434 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2435 fileno = fxdr_hyper(tl); 2436 len = fxdr_unsigned(int, *(tl + 2)); 2437 if (len <= 0 || len > NFS_MAXNAMLEN) { 2438 error = EBADRPC; 2439 m_freem(mrep); 2440 goto nfsmout; 2441 } 2442 tlen = nfsm_rndup(len); 2443 if (tlen == len) 2444 tlen += 4; /* To ensure null termination*/ 2445 tlen += sizeof (off_t) + sizeof (int); 2446 reclen = ALIGN(tlen + DIRHDSIZ); 2447 tlen = reclen - DIRHDSIZ; 2448 left = NFS_DIRFRAGSIZ - blksiz; 2449 if (reclen > left) { 2450 /* 2451 * DIRFRAGSIZ is aligned, no need to align 2452 * again here. 2453 */ 2454 dp->d_reclen += left; 2455 uiop->uio_iov->iov_base = 2456 (caddr_t)uiop->uio_iov->iov_base + left; 2457 uiop->uio_iov->iov_len -= left; 2458 uiop->uio_resid -= left; 2459 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2460 blksiz = 0; 2461 } 2462 if (reclen > uiop->uio_resid) 2463 bigenough = 0; 2464 if (bigenough) { 2465 dp = (struct dirent *)uiop->uio_iov->iov_base; 2466 dp->d_fileno = (int)fileno; 2467 dp->d_namlen = len; 2468 dp->d_reclen = reclen; 2469 dp->d_type = DT_UNKNOWN; 2470 blksiz += dp->d_reclen; 2471 if (blksiz == NFS_DIRFRAGSIZ) 2472 blksiz = 0; 2473 uiop->uio_resid -= DIRHDSIZ; 2474 uiop->uio_iov->iov_base = 2475 (caddr_t)uiop->uio_iov->iov_base + 2476 DIRHDSIZ; 2477 uiop->uio_iov->iov_len -= DIRHDSIZ; 2478 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2479 cnp->cn_namelen = len; 2480 nfsm_mtouio(uiop, len); 2481 cp = uiop->uio_iov->iov_base; 2482 tlen -= len; 2483 *cp = '\0'; 2484 uiop->uio_iov->iov_base = 2485 (caddr_t)uiop->uio_iov->iov_base + tlen; 2486 uiop->uio_iov->iov_len -= tlen; 2487 uiop->uio_resid -= tlen; 2488 } else 2489 nfsm_adv(nfsm_rndup(len)); 2490 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2491 if (bigenough) { 2492 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2493 uiop->uio_offset = 2494 fxdr_swapcookie3(tl); 2495 else 2496 uiop->uio_offset = 2497 fxdr_cookie3(tl); 2498 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2499 } 2500 tl += 2; 2501 2502 /* 2503 * Since the attributes are before the file handle 2504 * (sigh), we must skip over the attributes and then 2505 * come back and get them. 2506 */ 2507 attrflag = fxdr_unsigned(int, *tl); 2508 if (attrflag) { 2509 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2510 memcpy(&fattr, fp, NFSX_V3FATTR); 2511 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2512 doit = fxdr_unsigned(int, *tl); 2513 if (doit) { 2514 nfsm_getfh(fhp, fhsize, 1); 2515 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2516 VREF(vp); 2517 newvp = vp; 2518 np = dnp; 2519 } else { 2520 error = nfs_nget(vp->v_mount, fhp, 2521 fhsize, &np); 2522 if (!error) 2523 newvp = NFSTOV(np); 2524 } 2525 if (!error) { 2526 nfs_loadattrcache(&newvp, &fattr, 0); 2527 dp->d_type = 2528 IFTODT(VTTOIF(np->n_vattr->va_type)); 2529 ndp->ni_vp = newvp; 2530 cnp->cn_hash = 0; 2531 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2532 i++, hcp++) 2533 cnp->cn_hash += *hcp * i; 2534 if (cnp->cn_namelen <= NCHNAMLEN) 2535 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2536 cnp); 2537 } 2538 } 2539 } else { 2540 /* Just skip over the file handle */ 2541 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2542 i = fxdr_unsigned(int, *tl); 2543 nfsm_adv(nfsm_rndup(i)); 2544 } 2545 if (newvp != NULLVP) { 2546 vrele(newvp); 2547 if (newvp != vp) 2548 VOP_UNLOCK(vp, 0); 2549 newvp = NULLVP; 2550 } 2551 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2552 more_dirs = fxdr_unsigned(int, *tl); 2553 } 2554 /* 2555 * If at end of rpc data, get the eof boolean 2556 */ 2557 if (!more_dirs) { 2558 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2559 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2560 } 2561 m_freem(mrep); 2562 } 2563 /* 2564 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2565 * by increasing d_reclen for the last record. 2566 */ 2567 if (blksiz > 0) { 2568 left = NFS_DIRFRAGSIZ - blksiz; 2569 dp->d_reclen += left; 2570 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2571 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2572 left; 2573 uiop->uio_iov->iov_len -= left; 2574 uiop->uio_resid -= left; 2575 } 2576 2577 /* 2578 * We are now either at the end of the directory or have filled the 2579 * block. 2580 */ 2581 if (bigenough) 2582 dnp->n_direofoffset = uiop->uio_offset; 2583 nfsmout: 2584 if (newvp != NULLVP) { 2585 vrele(newvp); 2586 if (newvp != vp) 2587 VOP_UNLOCK(vp, 0); 2588 } 2589 return (error); 2590 } 2591 static char hextoasc[] = "0123456789abcdef"; 2592 2593 /* 2594 * Silly rename. To make the NFS filesystem that is stateless look a little 2595 * more like the "ufs" a remove of an active vnode is translated to a rename 2596 * to a funny looking filename that is removed by nfs_inactive on the 2597 * nfsnode. There is the potential for another process on a different client 2598 * to create the same funny name between the nfs_lookitup() fails and the 2599 * nfs_rename() completes, but... 2600 */ 2601 int 2602 nfs_sillyrename(dvp, vp, cnp) 2603 struct vnode *dvp, *vp; 2604 struct componentname *cnp; 2605 { 2606 struct sillyrename *sp; 2607 struct nfsnode *np; 2608 int error; 2609 short pid; 2610 2611 cache_purge(dvp); 2612 np = VTONFS(vp); 2613 #ifndef DIAGNOSTIC 2614 if (vp->v_type == VDIR) 2615 panic("nfs: sillyrename dir"); 2616 #endif 2617 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2618 M_NFSREQ, M_WAITOK); 2619 sp->s_cred = crdup(cnp->cn_cred); 2620 sp->s_dvp = dvp; 2621 VREF(dvp); 2622 2623 /* Fudge together a funny name */ 2624 pid = cnp->cn_proc->p_pid; 2625 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2626 sp->s_namlen = 12; 2627 sp->s_name[8] = hextoasc[pid & 0xf]; 2628 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2629 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2630 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2631 2632 /* Try lookitups until we get one that isn't there */ 2633 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2634 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2635 sp->s_name[4]++; 2636 if (sp->s_name[4] > 'z') { 2637 error = EINVAL; 2638 goto bad; 2639 } 2640 } 2641 error = nfs_renameit(dvp, cnp, sp); 2642 if (error) 2643 goto bad; 2644 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2645 cnp->cn_proc, &np); 2646 np->n_sillyrename = sp; 2647 return (0); 2648 bad: 2649 vrele(sp->s_dvp); 2650 crfree(sp->s_cred); 2651 free((caddr_t)sp, M_NFSREQ); 2652 return (error); 2653 } 2654 2655 /* 2656 * Look up a file name and optionally either update the file handle or 2657 * allocate an nfsnode, depending on the value of npp. 2658 * npp == NULL --> just do the lookup 2659 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2660 * handled too 2661 * *npp != NULL --> update the file handle in the vnode 2662 */ 2663 int 2664 nfs_lookitup(dvp, name, len, cred, procp, npp) 2665 struct vnode *dvp; 2666 const char *name; 2667 int len; 2668 struct ucred *cred; 2669 struct proc *procp; 2670 struct nfsnode **npp; 2671 { 2672 u_int32_t *tl; 2673 caddr_t cp; 2674 int32_t t1, t2; 2675 struct vnode *newvp = (struct vnode *)0; 2676 struct nfsnode *np, *dnp = VTONFS(dvp); 2677 caddr_t bpos, dpos, cp2; 2678 int error = 0, fhlen, attrflag; 2679 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2680 nfsfh_t *nfhp; 2681 const int v3 = NFS_ISV3(dvp); 2682 2683 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2684 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2685 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2686 nfsm_fhtom(dvp, v3); 2687 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2688 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2689 if (npp && !error) { 2690 nfsm_getfh(nfhp, fhlen, v3); 2691 if (*npp) { 2692 np = *npp; 2693 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2694 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2695 np->n_fhp = &np->n_fh; 2696 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2697 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2698 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2699 np->n_fhsize = fhlen; 2700 newvp = NFSTOV(np); 2701 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2702 VREF(dvp); 2703 newvp = dvp; 2704 } else { 2705 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2706 if (error) { 2707 m_freem(mrep); 2708 return (error); 2709 } 2710 newvp = NFSTOV(np); 2711 } 2712 if (v3) { 2713 nfsm_postop_attr(newvp, attrflag); 2714 if (!attrflag && *npp == NULL) { 2715 m_freem(mrep); 2716 vput(newvp); 2717 return (ENOENT); 2718 } 2719 } else 2720 nfsm_loadattr(newvp, (struct vattr *)0); 2721 } 2722 nfsm_reqdone; 2723 if (npp && *npp == NULL) { 2724 if (error) { 2725 if (newvp) 2726 vput(newvp); 2727 } else 2728 *npp = np; 2729 } 2730 return (error); 2731 } 2732 2733 /* 2734 * Nfs Version 3 commit rpc 2735 */ 2736 int 2737 nfs_commit(vp, offset, cnt, procp) 2738 struct vnode *vp; 2739 off_t offset; 2740 uint32_t cnt; 2741 struct proc *procp; 2742 { 2743 caddr_t cp; 2744 u_int32_t *tl; 2745 int32_t t1, t2; 2746 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2747 caddr_t bpos, dpos, cp2; 2748 int error = 0, wccflag = NFSV3_WCCRATTR; 2749 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2750 2751 #ifdef fvdl_debug 2752 printf("commit %lu - %lu\n", (unsigned long)offset, 2753 (unsigned long)(offset + cnt)); 2754 #endif 2755 2756 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2757 return (0); 2758 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2759 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2760 nfsm_fhtom(vp, 1); 2761 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2762 txdr_hyper(offset, tl); 2763 tl += 2; 2764 *tl = txdr_unsigned(cnt); 2765 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2766 nfsm_wcc_data(vp, wccflag); 2767 if (!error) { 2768 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2769 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2770 NFSX_V3WRITEVERF)) { 2771 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2772 NFSX_V3WRITEVERF); 2773 error = NFSERR_STALEWRITEVERF; 2774 } 2775 } 2776 nfsm_reqdone; 2777 return (error); 2778 } 2779 2780 /* 2781 * Kludge City.. 2782 * - make nfs_bmap() essentially a no-op that does no translation 2783 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2784 * (Maybe I could use the process's page mapping, but I was concerned that 2785 * Kernel Write might not be enabled and also figured copyout() would do 2786 * a lot more work than memcpy() and also it currently happens in the 2787 * context of the swapper process (2). 2788 */ 2789 int 2790 nfs_bmap(v) 2791 void *v; 2792 { 2793 struct vop_bmap_args /* { 2794 struct vnode *a_vp; 2795 daddr_t a_bn; 2796 struct vnode **a_vpp; 2797 daddr_t *a_bnp; 2798 int *a_runp; 2799 } */ *ap = v; 2800 struct vnode *vp = ap->a_vp; 2801 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2802 2803 if (ap->a_vpp != NULL) 2804 *ap->a_vpp = vp; 2805 if (ap->a_bnp != NULL) 2806 *ap->a_bnp = ap->a_bn << bshift; 2807 if (ap->a_runp != NULL) 2808 *ap->a_runp = 1024 * 1024; /* XXX */ 2809 return (0); 2810 } 2811 2812 /* 2813 * Strategy routine. 2814 * For async requests when nfsiod(s) are running, queue the request by 2815 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2816 * request. 2817 */ 2818 int 2819 nfs_strategy(v) 2820 void *v; 2821 { 2822 struct vop_strategy_args *ap = v; 2823 struct buf *bp = ap->a_bp; 2824 struct proc *p; 2825 int error = 0; 2826 2827 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2828 panic("nfs physio/async"); 2829 if (bp->b_flags & B_ASYNC) 2830 p = NULL; 2831 else 2832 p = curproc; /* XXX */ 2833 2834 /* 2835 * If the op is asynchronous and an i/o daemon is waiting 2836 * queue the request, wake it up and wait for completion 2837 * otherwise just do it ourselves. 2838 */ 2839 2840 if ((bp->b_flags & B_ASYNC) == 0 || 2841 nfs_asyncio(bp)) 2842 error = nfs_doio(bp, p); 2843 return (error); 2844 } 2845 2846 /* 2847 * fsync vnode op. Just call nfs_flush() with commit == 1. 2848 */ 2849 /* ARGSUSED */ 2850 int 2851 nfs_fsync(v) 2852 void *v; 2853 { 2854 struct vop_fsync_args /* { 2855 struct vnodeop_desc *a_desc; 2856 struct vnode * a_vp; 2857 struct ucred * a_cred; 2858 int a_flags; 2859 off_t offlo; 2860 off_t offhi; 2861 struct proc * a_p; 2862 } */ *ap = v; 2863 2864 return (nfs_flush(ap->a_vp, ap->a_cred, 2865 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2866 } 2867 2868 /* 2869 * Flush all the data associated with a vnode. 2870 */ 2871 int 2872 nfs_flush(vp, cred, waitfor, p, commit) 2873 struct vnode *vp; 2874 struct ucred *cred; 2875 int waitfor; 2876 struct proc *p; 2877 int commit; 2878 { 2879 struct uvm_object *uobj = &vp->v_uobj; 2880 struct nfsnode *np = VTONFS(vp); 2881 int error; 2882 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2883 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2884 2885 simple_lock(&uobj->vmobjlock); 2886 error = (uobj->pgops->pgo_put)(uobj, 0, 0, flushflags); 2887 if (np->n_flag & NWRITEERR) { 2888 error = np->n_error; 2889 np->n_flag &= ~NWRITEERR; 2890 } 2891 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2892 return (error); 2893 } 2894 2895 /* 2896 * Return POSIX pathconf information applicable to nfs. 2897 * 2898 * N.B. The NFS V2 protocol doesn't support this RPC. 2899 */ 2900 /* ARGSUSED */ 2901 int 2902 nfs_pathconf(v) 2903 void *v; 2904 { 2905 struct vop_pathconf_args /* { 2906 struct vnode *a_vp; 2907 int a_name; 2908 register_t *a_retval; 2909 } */ *ap = v; 2910 struct nfsv3_pathconf *pcp; 2911 struct vnode *vp = ap->a_vp; 2912 struct nfsmount *nmp; 2913 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2914 int32_t t1, t2; 2915 u_int32_t *tl; 2916 caddr_t bpos, dpos, cp, cp2; 2917 int error = 0, attrflag; 2918 unsigned int l; 2919 u_int64_t maxsize; 2920 const int v3 = NFS_ISV3(vp); 2921 2922 switch (ap->a_name) { 2923 /* Names that can be resolved locally. */ 2924 case _PC_PIPE_BUF: 2925 *ap->a_retval = PIPE_BUF; 2926 break; 2927 case _PC_SYNC_IO: 2928 *ap->a_retval = 1; 2929 break; 2930 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2931 case _PC_LINK_MAX: 2932 case _PC_NAME_MAX: 2933 case _PC_CHOWN_RESTRICTED: 2934 case _PC_NO_TRUNC: 2935 if (!v3) { 2936 error = EINVAL; 2937 break; 2938 } 2939 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2940 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2941 nfsm_fhtom(vp, 1); 2942 nfsm_request(vp, NFSPROC_PATHCONF, 2943 curproc, curproc->p_ucred); /* XXX */ 2944 nfsm_postop_attr(vp, attrflag); 2945 if (!error) { 2946 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2947 NFSX_V3PATHCONF); 2948 switch (ap->a_name) { 2949 case _PC_LINK_MAX: 2950 *ap->a_retval = 2951 fxdr_unsigned(register_t, pcp->pc_linkmax); 2952 break; 2953 case _PC_NAME_MAX: 2954 *ap->a_retval = 2955 fxdr_unsigned(register_t, pcp->pc_namemax); 2956 break; 2957 case _PC_CHOWN_RESTRICTED: 2958 *ap->a_retval = 2959 (pcp->pc_chownrestricted == nfs_true); 2960 break; 2961 case _PC_NO_TRUNC: 2962 *ap->a_retval = 2963 (pcp->pc_notrunc == nfs_true); 2964 break; 2965 } 2966 } 2967 nfsm_reqdone; 2968 break; 2969 case _PC_FILESIZEBITS: 2970 if (v3) { 2971 nmp = VFSTONFS(vp->v_mount); 2972 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2973 if ((error = nfs_fsinfo(nmp, vp, 2974 curproc->p_ucred, curproc)) != 0) /* XXX */ 2975 break; 2976 for (l = 0, maxsize = nmp->nm_maxfilesize; 2977 (maxsize >> l) > 0; l++) 2978 ; 2979 *ap->a_retval = l + 1; 2980 } else { 2981 *ap->a_retval = 32; /* NFS V2 limitation */ 2982 } 2983 break; 2984 default: 2985 error = EINVAL; 2986 break; 2987 } 2988 2989 return (error); 2990 } 2991 2992 /* 2993 * NFS advisory byte-level locks. 2994 */ 2995 int 2996 nfs_advlock(v) 2997 void *v; 2998 { 2999 struct vop_advlock_args /* { 3000 struct vnode *a_vp; 3001 caddr_t a_id; 3002 int a_op; 3003 struct flock *a_fl; 3004 int a_flags; 3005 } */ *ap = v; 3006 struct nfsnode *np = VTONFS(ap->a_vp); 3007 3008 return lf_advlock(ap, &np->n_lockf, np->n_size); 3009 } 3010 3011 /* 3012 * Print out the contents of an nfsnode. 3013 */ 3014 int 3015 nfs_print(v) 3016 void *v; 3017 { 3018 struct vop_print_args /* { 3019 struct vnode *a_vp; 3020 } */ *ap = v; 3021 struct vnode *vp = ap->a_vp; 3022 struct nfsnode *np = VTONFS(vp); 3023 3024 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3025 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3026 if (vp->v_type == VFIFO) 3027 fifo_printinfo(vp); 3028 printf("\n"); 3029 return (0); 3030 } 3031 3032 /* 3033 * NFS file truncation. 3034 */ 3035 int 3036 nfs_truncate(v) 3037 void *v; 3038 { 3039 #if 0 3040 struct vop_truncate_args /* { 3041 struct vnode *a_vp; 3042 off_t a_length; 3043 int a_flags; 3044 struct ucred *a_cred; 3045 struct proc *a_p; 3046 } */ *ap = v; 3047 #endif 3048 3049 /* Use nfs_setattr */ 3050 return (EOPNOTSUPP); 3051 } 3052 3053 /* 3054 * NFS update. 3055 */ 3056 int 3057 nfs_update(v) 3058 void *v; 3059 #if 0 3060 struct vop_update_args /* { 3061 struct vnode *a_vp; 3062 struct timespec *a_ta; 3063 struct timespec *a_tm; 3064 int a_waitfor; 3065 } */ *ap = v; 3066 #endif 3067 { 3068 3069 /* Use nfs_setattr */ 3070 return (EOPNOTSUPP); 3071 } 3072 3073 /* 3074 * Just call bwrite(). 3075 */ 3076 int 3077 nfs_bwrite(v) 3078 void *v; 3079 { 3080 struct vop_bwrite_args /* { 3081 struct vnode *a_bp; 3082 } */ *ap = v; 3083 3084 return (bwrite(ap->a_bp)); 3085 } 3086 3087 /* 3088 * nfs special file access vnode op. 3089 * Essentially just get vattr and then imitate iaccess() since the device is 3090 * local to the client. 3091 */ 3092 int 3093 nfsspec_access(v) 3094 void *v; 3095 { 3096 struct vop_access_args /* { 3097 struct vnode *a_vp; 3098 int a_mode; 3099 struct ucred *a_cred; 3100 struct proc *a_p; 3101 } */ *ap = v; 3102 struct vattr va; 3103 struct vnode *vp = ap->a_vp; 3104 int error; 3105 3106 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3107 if (error) 3108 return (error); 3109 3110 /* 3111 * Disallow write attempts on filesystems mounted read-only; 3112 * unless the file is a socket, fifo, or a block or character 3113 * device resident on the filesystem. 3114 */ 3115 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3116 switch (vp->v_type) { 3117 case VREG: 3118 case VDIR: 3119 case VLNK: 3120 return (EROFS); 3121 default: 3122 break; 3123 } 3124 } 3125 3126 return (vaccess(va.va_type, va.va_mode, 3127 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3128 } 3129 3130 /* 3131 * Read wrapper for special devices. 3132 */ 3133 int 3134 nfsspec_read(v) 3135 void *v; 3136 { 3137 struct vop_read_args /* { 3138 struct vnode *a_vp; 3139 struct uio *a_uio; 3140 int a_ioflag; 3141 struct ucred *a_cred; 3142 } */ *ap = v; 3143 struct nfsnode *np = VTONFS(ap->a_vp); 3144 3145 /* 3146 * Set access flag. 3147 */ 3148 np->n_flag |= NACC; 3149 np->n_atim.tv_sec = time.tv_sec; 3150 np->n_atim.tv_nsec = time.tv_usec * 1000; 3151 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3152 } 3153 3154 /* 3155 * Write wrapper for special devices. 3156 */ 3157 int 3158 nfsspec_write(v) 3159 void *v; 3160 { 3161 struct vop_write_args /* { 3162 struct vnode *a_vp; 3163 struct uio *a_uio; 3164 int a_ioflag; 3165 struct ucred *a_cred; 3166 } */ *ap = v; 3167 struct nfsnode *np = VTONFS(ap->a_vp); 3168 3169 /* 3170 * Set update flag. 3171 */ 3172 np->n_flag |= NUPD; 3173 np->n_mtim.tv_sec = time.tv_sec; 3174 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3175 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3176 } 3177 3178 /* 3179 * Close wrapper for special devices. 3180 * 3181 * Update the times on the nfsnode then do device close. 3182 */ 3183 int 3184 nfsspec_close(v) 3185 void *v; 3186 { 3187 struct vop_close_args /* { 3188 struct vnode *a_vp; 3189 int a_fflag; 3190 struct ucred *a_cred; 3191 struct proc *a_p; 3192 } */ *ap = v; 3193 struct vnode *vp = ap->a_vp; 3194 struct nfsnode *np = VTONFS(vp); 3195 struct vattr vattr; 3196 3197 if (np->n_flag & (NACC | NUPD)) { 3198 np->n_flag |= NCHG; 3199 if (vp->v_usecount == 1 && 3200 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3201 VATTR_NULL(&vattr); 3202 if (np->n_flag & NACC) 3203 vattr.va_atime = np->n_atim; 3204 if (np->n_flag & NUPD) 3205 vattr.va_mtime = np->n_mtim; 3206 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3207 } 3208 } 3209 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3210 } 3211 3212 /* 3213 * Read wrapper for fifos. 3214 */ 3215 int 3216 nfsfifo_read(v) 3217 void *v; 3218 { 3219 struct vop_read_args /* { 3220 struct vnode *a_vp; 3221 struct uio *a_uio; 3222 int a_ioflag; 3223 struct ucred *a_cred; 3224 } */ *ap = v; 3225 struct nfsnode *np = VTONFS(ap->a_vp); 3226 3227 /* 3228 * Set access flag. 3229 */ 3230 np->n_flag |= NACC; 3231 np->n_atim.tv_sec = time.tv_sec; 3232 np->n_atim.tv_nsec = time.tv_usec * 1000; 3233 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3234 } 3235 3236 /* 3237 * Write wrapper for fifos. 3238 */ 3239 int 3240 nfsfifo_write(v) 3241 void *v; 3242 { 3243 struct vop_write_args /* { 3244 struct vnode *a_vp; 3245 struct uio *a_uio; 3246 int a_ioflag; 3247 struct ucred *a_cred; 3248 } */ *ap = v; 3249 struct nfsnode *np = VTONFS(ap->a_vp); 3250 3251 /* 3252 * Set update flag. 3253 */ 3254 np->n_flag |= NUPD; 3255 np->n_mtim.tv_sec = time.tv_sec; 3256 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3257 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3258 } 3259 3260 /* 3261 * Close wrapper for fifos. 3262 * 3263 * Update the times on the nfsnode then do fifo close. 3264 */ 3265 int 3266 nfsfifo_close(v) 3267 void *v; 3268 { 3269 struct vop_close_args /* { 3270 struct vnode *a_vp; 3271 int a_fflag; 3272 struct ucred *a_cred; 3273 struct proc *a_p; 3274 } */ *ap = v; 3275 struct vnode *vp = ap->a_vp; 3276 struct nfsnode *np = VTONFS(vp); 3277 struct vattr vattr; 3278 3279 if (np->n_flag & (NACC | NUPD)) { 3280 if (np->n_flag & NACC) { 3281 np->n_atim.tv_sec = time.tv_sec; 3282 np->n_atim.tv_nsec = time.tv_usec * 1000; 3283 } 3284 if (np->n_flag & NUPD) { 3285 np->n_mtim.tv_sec = time.tv_sec; 3286 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3287 } 3288 np->n_flag |= NCHG; 3289 if (vp->v_usecount == 1 && 3290 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3291 VATTR_NULL(&vattr); 3292 if (np->n_flag & NACC) 3293 vattr.va_atime = np->n_atim; 3294 if (np->n_flag & NUPD) 3295 vattr.va_mtime = np->n_mtim; 3296 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3297 } 3298 } 3299 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3300 } 3301
Indexes created Tue Oct 14 11:09:46 GMT 2025