nfs_vnops.c revision 1.135
1 /* $NetBSD: nfs_vnops.c,v 1.135 2001/07/24 15:39:33 assar Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include "opt_nfs.h" 46 #include "opt_uvmhist.h" 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/resourcevar.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/malloc.h> 57 #include <sys/mbuf.h> 58 #include <sys/namei.h> 59 #include <sys/vnode.h> 60 #include <sys/dirent.h> 61 #include <sys/fcntl.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/unistd.h> 65 66 #include <uvm/uvm_extern.h> 67 #include <uvm/uvm.h> 68 69 #include <miscfs/fifofs/fifo.h> 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsproto.h> 75 #include <nfs/nfs.h> 76 #include <nfs/nfsnode.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/xdr_subs.h> 79 #include <nfs/nfsm_subs.h> 80 #include <nfs/nqnfs.h> 81 #include <nfs/nfs_var.h> 82 83 #include <net/if.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 87 /* Defs */ 88 #define TRUE 1 89 #define FALSE 0 90 91 /* 92 * Global vfs data structures for nfs 93 */ 94 int (**nfsv2_vnodeop_p) __P((void *)); 95 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 96 { &vop_default_desc, vn_default_error }, 97 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 98 { &vop_create_desc, nfs_create }, /* create */ 99 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 100 { &vop_open_desc, nfs_open }, /* open */ 101 { &vop_close_desc, nfs_close }, /* close */ 102 { &vop_access_desc, nfs_access }, /* access */ 103 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 104 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 105 { &vop_read_desc, nfs_read }, /* read */ 106 { &vop_write_desc, nfs_write }, /* write */ 107 { &vop_lease_desc, nfs_lease_check }, /* lease */ 108 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, nfs_poll }, /* poll */ 111 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 112 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 113 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 114 { &vop_seek_desc, nfs_seek }, /* seek */ 115 { &vop_remove_desc, nfs_remove }, /* remove */ 116 { &vop_link_desc, nfs_link }, /* link */ 117 { &vop_rename_desc, nfs_rename }, /* rename */ 118 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 119 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 120 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 121 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 122 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 123 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 124 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 125 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 126 { &vop_lock_desc, nfs_lock }, /* lock */ 127 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 128 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 129 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 130 { &vop_print_desc, nfs_print }, /* print */ 131 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 132 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 133 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 134 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 135 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 136 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 137 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 138 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 139 { &vop_update_desc, nfs_update }, /* update */ 140 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 141 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 142 { &vop_putpages_desc, nfs_putpages }, /* putpages */ 143 { NULL, NULL } 144 }; 145 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 146 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 147 148 /* 149 * Special device vnode ops 150 */ 151 int (**spec_nfsv2nodeop_p) __P((void *)); 152 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 153 { &vop_default_desc, vn_default_error }, 154 { &vop_lookup_desc, spec_lookup }, /* lookup */ 155 { &vop_create_desc, spec_create }, /* create */ 156 { &vop_mknod_desc, spec_mknod }, /* mknod */ 157 { &vop_open_desc, spec_open }, /* open */ 158 { &vop_close_desc, nfsspec_close }, /* close */ 159 { &vop_access_desc, nfsspec_access }, /* access */ 160 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 161 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 162 { &vop_read_desc, nfsspec_read }, /* read */ 163 { &vop_write_desc, nfsspec_write }, /* write */ 164 { &vop_lease_desc, spec_lease_check }, /* lease */ 165 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 166 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 167 { &vop_poll_desc, spec_poll }, /* poll */ 168 { &vop_revoke_desc, spec_revoke }, /* revoke */ 169 { &vop_mmap_desc, spec_mmap }, /* mmap */ 170 { &vop_fsync_desc, spec_fsync }, /* fsync */ 171 { &vop_seek_desc, spec_seek }, /* seek */ 172 { &vop_remove_desc, spec_remove }, /* remove */ 173 { &vop_link_desc, spec_link }, /* link */ 174 { &vop_rename_desc, spec_rename }, /* rename */ 175 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 176 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 177 { &vop_symlink_desc, spec_symlink }, /* symlink */ 178 { &vop_readdir_desc, spec_readdir }, /* readdir */ 179 { &vop_readlink_desc, spec_readlink }, /* readlink */ 180 { &vop_abortop_desc, spec_abortop }, /* abortop */ 181 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 182 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 183 { &vop_lock_desc, nfs_lock }, /* lock */ 184 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 185 { &vop_bmap_desc, spec_bmap }, /* bmap */ 186 { &vop_strategy_desc, spec_strategy }, /* strategy */ 187 { &vop_print_desc, nfs_print }, /* print */ 188 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 189 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 190 { &vop_advlock_desc, spec_advlock }, /* advlock */ 191 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 192 { &vop_valloc_desc, spec_valloc }, /* valloc */ 193 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 194 { &vop_vfree_desc, spec_vfree }, /* vfree */ 195 { &vop_truncate_desc, spec_truncate }, /* truncate */ 196 { &vop_update_desc, nfs_update }, /* update */ 197 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 198 { NULL, NULL } 199 }; 200 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 201 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 202 203 int (**fifo_nfsv2nodeop_p) __P((void *)); 204 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 205 { &vop_default_desc, vn_default_error }, 206 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 207 { &vop_create_desc, fifo_create }, /* create */ 208 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 209 { &vop_open_desc, fifo_open }, /* open */ 210 { &vop_close_desc, nfsfifo_close }, /* close */ 211 { &vop_access_desc, nfsspec_access }, /* access */ 212 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 213 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 214 { &vop_read_desc, nfsfifo_read }, /* read */ 215 { &vop_write_desc, nfsfifo_write }, /* write */ 216 { &vop_lease_desc, fifo_lease_check }, /* lease */ 217 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 218 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 219 { &vop_poll_desc, fifo_poll }, /* poll */ 220 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 221 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 222 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 223 { &vop_seek_desc, fifo_seek }, /* seek */ 224 { &vop_remove_desc, fifo_remove }, /* remove */ 225 { &vop_link_desc, fifo_link }, /* link */ 226 { &vop_rename_desc, fifo_rename }, /* rename */ 227 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 228 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 229 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 230 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 231 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 232 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 233 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 234 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 235 { &vop_lock_desc, nfs_lock }, /* lock */ 236 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 237 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 238 { &vop_strategy_desc, genfs_badop }, /* strategy */ 239 { &vop_print_desc, nfs_print }, /* print */ 240 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 241 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 242 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 243 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 244 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 245 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 246 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 247 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 248 { &vop_update_desc, nfs_update }, /* update */ 249 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 250 { NULL, NULL } 251 }; 252 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 253 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 254 255 /* 256 * Global variables 257 */ 258 extern u_int32_t nfs_true, nfs_false; 259 extern u_int32_t nfs_xdrneg1; 260 extern struct nfsstats nfsstats; 261 extern nfstype nfsv3_type[9]; 262 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 263 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 264 int nfs_numasync = 0; 265 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 266 267 /* 268 * nfs null call from vfs. 269 */ 270 int 271 nfs_null(vp, cred, procp) 272 struct vnode *vp; 273 struct ucred *cred; 274 struct proc *procp; 275 { 276 caddr_t bpos, dpos; 277 int error = 0; 278 struct mbuf *mreq, *mrep, *md, *mb; 279 280 nfsm_reqhead(vp, NFSPROC_NULL, 0); 281 nfsm_request(vp, NFSPROC_NULL, procp, cred); 282 nfsm_reqdone; 283 return (error); 284 } 285 286 /* 287 * nfs access vnode op. 288 * For nfs version 2, just return ok. File accesses may fail later. 289 * For nfs version 3, use the access rpc to check accessibility. If file modes 290 * are changed on the server, accesses might still fail later. 291 */ 292 int 293 nfs_access(v) 294 void *v; 295 { 296 struct vop_access_args /* { 297 struct vnode *a_vp; 298 int a_mode; 299 struct ucred *a_cred; 300 struct proc *a_p; 301 } */ *ap = v; 302 struct vnode *vp = ap->a_vp; 303 u_int32_t *tl; 304 caddr_t cp; 305 int32_t t1, t2; 306 caddr_t bpos, dpos, cp2; 307 int error = 0, attrflag, cachevalid; 308 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 309 u_int32_t mode, rmode; 310 const int v3 = NFS_ISV3(vp); 311 struct nfsnode *np = VTONFS(vp); 312 313 cachevalid = (np->n_accstamp != -1 && 314 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 315 np->n_accuid == ap->a_cred->cr_uid); 316 317 /* 318 * Check access cache first. If this request has been made for this 319 * uid shortly before, use the cached result. 320 */ 321 if (cachevalid) { 322 if (!np->n_accerror) { 323 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 324 return np->n_accerror; 325 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 326 return np->n_accerror; 327 } 328 329 /* 330 * For nfs v3, do an access rpc, otherwise you are stuck emulating 331 * ufs_access() locally using the vattr. This may not be correct, 332 * since the server may apply other access criteria such as 333 * client uid-->server uid mapping that we do not know about, but 334 * this is better than just returning anything that is lying about 335 * in the cache. 336 */ 337 if (v3) { 338 nfsstats.rpccnt[NFSPROC_ACCESS]++; 339 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 340 nfsm_fhtom(vp, v3); 341 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 342 if (ap->a_mode & VREAD) 343 mode = NFSV3ACCESS_READ; 344 else 345 mode = 0; 346 if (vp->v_type != VDIR) { 347 if (ap->a_mode & VWRITE) 348 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 349 if (ap->a_mode & VEXEC) 350 mode |= NFSV3ACCESS_EXECUTE; 351 } else { 352 if (ap->a_mode & VWRITE) 353 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 354 NFSV3ACCESS_DELETE); 355 if (ap->a_mode & VEXEC) 356 mode |= NFSV3ACCESS_LOOKUP; 357 } 358 *tl = txdr_unsigned(mode); 359 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 360 nfsm_postop_attr(vp, attrflag); 361 if (!error) { 362 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 363 rmode = fxdr_unsigned(u_int32_t, *tl); 364 /* 365 * The NFS V3 spec does not clarify whether or not 366 * the returned access bits can be a superset of 367 * the ones requested, so... 368 */ 369 if ((rmode & mode) != mode) 370 error = EACCES; 371 } 372 nfsm_reqdone; 373 } else 374 return (nfsspec_access(ap)); 375 /* 376 * Disallow write attempts on filesystems mounted read-only; 377 * unless the file is a socket, fifo, or a block or character 378 * device resident on the filesystem. 379 */ 380 if (!error && (ap->a_mode & VWRITE) && 381 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 382 switch (vp->v_type) { 383 case VREG: 384 case VDIR: 385 case VLNK: 386 error = EROFS; 387 default: 388 break; 389 } 390 } 391 392 if (!error || error == EACCES) { 393 /* 394 * If we got the same result as for a previous, 395 * different request, OR it in. Don't update 396 * the timestamp in that case. 397 */ 398 if (cachevalid && error == np->n_accerror) { 399 if (!error) 400 np->n_accmode |= ap->a_mode; 401 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 402 np->n_accmode = ap->a_mode; 403 } else { 404 np->n_accstamp = time.tv_sec; 405 np->n_accuid = ap->a_cred->cr_uid; 406 np->n_accmode = ap->a_mode; 407 np->n_accerror = error; 408 } 409 } 410 411 return (error); 412 } 413 414 /* 415 * nfs open vnode op 416 * Check to see if the type is ok 417 * and that deletion is not in progress. 418 * For paged in text files, you will need to flush the page cache 419 * if consistency is lost. 420 */ 421 /* ARGSUSED */ 422 int 423 nfs_open(v) 424 void *v; 425 { 426 struct vop_open_args /* { 427 struct vnode *a_vp; 428 int a_mode; 429 struct ucred *a_cred; 430 struct proc *a_p; 431 } */ *ap = v; 432 struct vnode *vp = ap->a_vp; 433 struct nfsnode *np = VTONFS(vp); 434 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 435 struct vattr vattr; 436 int error; 437 438 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 439 return (EACCES); 440 } 441 442 /* 443 * Initialize read and write creds here, for swapfiles 444 * and other paths that don't set the creds themselves. 445 */ 446 447 if (ap->a_mode & FREAD) { 448 if (np->n_rcred) { 449 crfree(np->n_rcred); 450 } 451 np->n_rcred = ap->a_cred; 452 crhold(np->n_rcred); 453 } 454 if (ap->a_mode & FWRITE) { 455 if (np->n_wcred) { 456 crfree(np->n_wcred); 457 } 458 np->n_wcred = ap->a_cred; 459 crhold(np->n_wcred); 460 } 461 462 #ifndef NFS_V2_ONLY 463 /* 464 * Get a valid lease. If cached data is stale, flush it. 465 */ 466 if (nmp->nm_flag & NFSMNT_NQNFS) { 467 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 468 do { 469 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 470 ap->a_p); 471 } while (error == NQNFS_EXPIRED); 472 if (error) 473 return (error); 474 if (np->n_lrev != np->n_brev || 475 (np->n_flag & NQNFSNONCACHE)) { 476 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 477 ap->a_p, 1)) == EINTR) 478 return (error); 479 np->n_brev = np->n_lrev; 480 } 481 } 482 } else 483 #endif 484 { 485 if (np->n_flag & NMODIFIED) { 486 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 487 ap->a_p, 1)) == EINTR) 488 return (error); 489 np->n_attrstamp = 0; 490 if (vp->v_type == VDIR) { 491 nfs_invaldircache(vp, 0); 492 np->n_direofoffset = 0; 493 } 494 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 495 if (error) 496 return (error); 497 np->n_mtime = vattr.va_mtime.tv_sec; 498 } else { 499 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 500 if (error) 501 return (error); 502 if (np->n_mtime != vattr.va_mtime.tv_sec) { 503 if (vp->v_type == VDIR) { 504 nfs_invaldircache(vp, 0); 505 np->n_direofoffset = 0; 506 } 507 if ((error = nfs_vinvalbuf(vp, V_SAVE, 508 ap->a_cred, ap->a_p, 1)) == EINTR) 509 return (error); 510 np->n_mtime = vattr.va_mtime.tv_sec; 511 } 512 } 513 } 514 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 515 np->n_attrstamp = 0; /* For Open/Close consistency */ 516 return (0); 517 } 518 519 /* 520 * nfs close vnode op 521 * What an NFS client should do upon close after writing is a debatable issue. 522 * Most NFS clients push delayed writes to the server upon close, basically for 523 * two reasons: 524 * 1 - So that any write errors may be reported back to the client process 525 * doing the close system call. By far the two most likely errors are 526 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 527 * 2 - To put a worst case upper bound on cache inconsistency between 528 * multiple clients for the file. 529 * There is also a consistency problem for Version 2 of the protocol w.r.t. 530 * not being able to tell if other clients are writing a file concurrently, 531 * since there is no way of knowing if the changed modify time in the reply 532 * is only due to the write for this client. 533 * (NFS Version 3 provides weak cache consistency data in the reply that 534 * should be sufficient to detect and handle this case.) 535 * 536 * The current code does the following: 537 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 538 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 539 * or commit them (this satisfies 1 and 2 except for the 540 * case where the server crashes after this close but 541 * before the commit RPC, which is felt to be "good 542 * enough". Changing the last argument to nfs_flush() to 543 * a 1 would force a commit operation, if it is felt a 544 * commit is necessary now. 545 * for NQNFS - do nothing now, since 2 is dealt with via leases and 546 * 1 should be dealt with via an fsync() system call for 547 * cases where write errors are important. 548 */ 549 /* ARGSUSED */ 550 int 551 nfs_close(v) 552 void *v; 553 { 554 struct vop_close_args /* { 555 struct vnodeop_desc *a_desc; 556 struct vnode *a_vp; 557 int a_fflag; 558 struct ucred *a_cred; 559 struct proc *a_p; 560 } */ *ap = v; 561 struct vnode *vp = ap->a_vp; 562 struct nfsnode *np = VTONFS(vp); 563 int error = 0; 564 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 565 566 if (vp->v_type == VREG) { 567 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 568 (np->n_flag & NMODIFIED)) { 569 if (NFS_ISV3(vp)) { 570 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 571 np->n_flag &= ~NMODIFIED; 572 } else 573 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 574 np->n_attrstamp = 0; 575 } 576 if (np->n_flag & NWRITEERR) { 577 np->n_flag &= ~NWRITEERR; 578 error = np->n_error; 579 } 580 } 581 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 582 return (error); 583 } 584 585 /* 586 * nfs getattr call from vfs. 587 */ 588 int 589 nfs_getattr(v) 590 void *v; 591 { 592 struct vop_getattr_args /* { 593 struct vnode *a_vp; 594 struct vattr *a_vap; 595 struct ucred *a_cred; 596 struct proc *a_p; 597 } */ *ap = v; 598 struct vnode *vp = ap->a_vp; 599 struct nfsnode *np = VTONFS(vp); 600 caddr_t cp; 601 u_int32_t *tl; 602 int32_t t1, t2; 603 caddr_t bpos, dpos; 604 int error = 0; 605 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 606 const int v3 = NFS_ISV3(vp); 607 608 /* 609 * Update local times for special files. 610 */ 611 if (np->n_flag & (NACC | NUPD)) 612 np->n_flag |= NCHG; 613 /* 614 * First look in the cache. 615 */ 616 if (nfs_getattrcache(vp, ap->a_vap) == 0) 617 return (0); 618 nfsstats.rpccnt[NFSPROC_GETATTR]++; 619 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 620 nfsm_fhtom(vp, v3); 621 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 622 if (!error) { 623 nfsm_loadattr(vp, ap->a_vap); 624 if (vp->v_type == VDIR && 625 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 626 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 627 } 628 nfsm_reqdone; 629 return (error); 630 } 631 632 /* 633 * nfs setattr call. 634 */ 635 int 636 nfs_setattr(v) 637 void *v; 638 { 639 struct vop_setattr_args /* { 640 struct vnodeop_desc *a_desc; 641 struct vnode *a_vp; 642 struct vattr *a_vap; 643 struct ucred *a_cred; 644 struct proc *a_p; 645 } */ *ap = v; 646 struct vnode *vp = ap->a_vp; 647 struct nfsnode *np = VTONFS(vp); 648 struct vattr *vap = ap->a_vap; 649 int error = 0; 650 u_quad_t tsize = 0; 651 652 /* 653 * Setting of flags is not supported. 654 */ 655 if (vap->va_flags != VNOVAL) 656 return (EOPNOTSUPP); 657 658 /* 659 * Disallow write attempts if the filesystem is mounted read-only. 660 */ 661 if ((vap->va_uid != (uid_t)VNOVAL || 662 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 663 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 664 (vp->v_mount->mnt_flag & MNT_RDONLY)) 665 return (EROFS); 666 if (vap->va_size != VNOVAL) { 667 switch (vp->v_type) { 668 case VDIR: 669 return (EISDIR); 670 case VCHR: 671 case VBLK: 672 case VSOCK: 673 case VFIFO: 674 if (vap->va_mtime.tv_sec == VNOVAL && 675 vap->va_atime.tv_sec == VNOVAL && 676 vap->va_mode == (mode_t)VNOVAL && 677 vap->va_uid == (uid_t)VNOVAL && 678 vap->va_gid == (gid_t)VNOVAL) 679 return (0); 680 vap->va_size = VNOVAL; 681 break; 682 default: 683 /* 684 * Disallow write attempts if the filesystem is 685 * mounted read-only. 686 */ 687 if (vp->v_mount->mnt_flag & MNT_RDONLY) 688 return (EROFS); 689 uvm_vnp_setsize(vp, vap->va_size); 690 if (vap->va_size == 0) 691 error = nfs_vinvalbuf(vp, 0, 692 ap->a_cred, ap->a_p, 1); 693 else 694 error = nfs_vinvalbuf(vp, V_SAVE, 695 ap->a_cred, ap->a_p, 1); 696 if (error) { 697 uvm_vnp_setsize(vp, np->n_size); 698 return (error); 699 } 700 tsize = np->n_size; 701 np->n_size = np->n_vattr->va_size = vap->va_size; 702 } 703 } else if ((vap->va_mtime.tv_sec != VNOVAL || 704 vap->va_atime.tv_sec != VNOVAL) && 705 vp->v_type == VREG && 706 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 707 ap->a_p, 1)) == EINTR) 708 return (error); 709 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 710 if (error && vap->va_size != VNOVAL) { 711 np->n_size = np->n_vattr->va_size = tsize; 712 uvm_vnp_setsize(vp, np->n_size); 713 } 714 return (error); 715 } 716 717 /* 718 * Do an nfs setattr rpc. 719 */ 720 int 721 nfs_setattrrpc(vp, vap, cred, procp) 722 struct vnode *vp; 723 struct vattr *vap; 724 struct ucred *cred; 725 struct proc *procp; 726 { 727 struct nfsv2_sattr *sp; 728 caddr_t cp; 729 int32_t t1, t2; 730 caddr_t bpos, dpos, cp2; 731 u_int32_t *tl; 732 int error = 0, wccflag = NFSV3_WCCRATTR; 733 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 734 const int v3 = NFS_ISV3(vp); 735 736 nfsstats.rpccnt[NFSPROC_SETATTR]++; 737 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 738 nfsm_fhtom(vp, v3); 739 if (v3) { 740 nfsm_v3attrbuild(vap, TRUE); 741 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 742 *tl = nfs_false; 743 } else { 744 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 745 if (vap->va_mode == (mode_t)VNOVAL) 746 sp->sa_mode = nfs_xdrneg1; 747 else 748 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 749 if (vap->va_uid == (uid_t)VNOVAL) 750 sp->sa_uid = nfs_xdrneg1; 751 else 752 sp->sa_uid = txdr_unsigned(vap->va_uid); 753 if (vap->va_gid == (gid_t)VNOVAL) 754 sp->sa_gid = nfs_xdrneg1; 755 else 756 sp->sa_gid = txdr_unsigned(vap->va_gid); 757 sp->sa_size = txdr_unsigned(vap->va_size); 758 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 759 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 760 } 761 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 762 if (v3) { 763 nfsm_wcc_data(vp, wccflag); 764 } else 765 nfsm_loadattr(vp, (struct vattr *)0); 766 nfsm_reqdone; 767 return (error); 768 } 769 770 /* 771 * nfs lookup call, one step at a time... 772 * First look in cache 773 * If not found, unlock the directory nfsnode and do the rpc 774 * 775 * This code is full of lock/unlock statements and checks, because 776 * we continue after cache_lookup has finished (we need to check 777 * with the attr cache and do an rpc if it has timed out). This means 778 * that the locking effects of cache_lookup have to be taken into 779 * account. 780 */ 781 int 782 nfs_lookup(v) 783 void *v; 784 { 785 struct vop_lookup_args /* { 786 struct vnodeop_desc *a_desc; 787 struct vnode *a_dvp; 788 struct vnode **a_vpp; 789 struct componentname *a_cnp; 790 } */ *ap = v; 791 struct componentname *cnp = ap->a_cnp; 792 struct vnode *dvp = ap->a_dvp; 793 struct vnode **vpp = ap->a_vpp; 794 int flags; 795 struct vnode *newvp; 796 u_int32_t *tl; 797 caddr_t cp; 798 int32_t t1, t2; 799 struct nfsmount *nmp; 800 caddr_t bpos, dpos, cp2; 801 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 802 long len; 803 nfsfh_t *fhp; 804 struct nfsnode *np; 805 int lockparent, wantparent, error = 0, attrflag, fhsize; 806 const int v3 = NFS_ISV3(dvp); 807 808 cnp->cn_flags &= ~PDIRUNLOCK; 809 flags = cnp->cn_flags; 810 811 *vpp = NULLVP; 812 newvp = NULLVP; 813 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 814 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 815 return (EROFS); 816 if (dvp->v_type != VDIR) 817 return (ENOTDIR); 818 819 lockparent = flags & LOCKPARENT; 820 wantparent = flags & (LOCKPARENT|WANTPARENT); 821 nmp = VFSTONFS(dvp->v_mount); 822 np = VTONFS(dvp); 823 824 /* 825 * Before tediously performing a linear scan of the directory, 826 * check the name cache to see if the directory/name pair 827 * we are looking for is known already. 828 * If the directory/name pair is found in the name cache, 829 * we have to ensure the directory has not changed from 830 * the time the cache entry has been created. If it has, 831 * the cache entry has to be ignored 832 */ 833 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 834 struct vattr vattr; 835 int err2; 836 837 if (error && error != ENOENT) { 838 *vpp = NULLVP; 839 return error; 840 } 841 842 if (cnp->cn_flags & PDIRUNLOCK) { 843 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 844 if (err2 != 0) { 845 *vpp = NULLVP; 846 return err2; 847 } 848 cnp->cn_flags &= ~PDIRUNLOCK; 849 } 850 851 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 852 if (err2 != 0) { 853 if (error == 0) { 854 if (*vpp != dvp) 855 vput(*vpp); 856 else 857 vrele(*vpp); 858 } 859 *vpp = NULLVP; 860 return err2; 861 } 862 863 if (error == ENOENT) { 864 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 865 cnp->cn_proc) && vattr.va_mtime.tv_sec == 866 VTONFS(dvp)->n_nctime) 867 return ENOENT; 868 cache_purge(dvp); 869 np->n_nctime = 0; 870 goto dorpc; 871 } 872 873 newvp = *vpp; 874 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 875 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 876 { 877 nfsstats.lookupcache_hits++; 878 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 879 cnp->cn_flags |= SAVENAME; 880 if ((!lockparent || !(flags & ISLASTCN)) && 881 newvp != dvp) 882 VOP_UNLOCK(dvp, 0); 883 return (0); 884 } 885 cache_purge(newvp); 886 if (newvp != dvp) 887 vput(newvp); 888 else 889 vrele(newvp); 890 *vpp = NULLVP; 891 } 892 dorpc: 893 error = 0; 894 newvp = NULLVP; 895 nfsstats.lookupcache_misses++; 896 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 897 len = cnp->cn_namelen; 898 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 899 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 900 nfsm_fhtom(dvp, v3); 901 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 902 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 903 if (error) { 904 nfsm_postop_attr(dvp, attrflag); 905 m_freem(mrep); 906 goto nfsmout; 907 } 908 nfsm_getfh(fhp, fhsize, v3); 909 910 /* 911 * Handle RENAME case... 912 */ 913 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 914 if (NFS_CMPFH(np, fhp, fhsize)) { 915 m_freem(mrep); 916 return (EISDIR); 917 } 918 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 919 if (error) { 920 m_freem(mrep); 921 return error; 922 } 923 newvp = NFSTOV(np); 924 if (v3) { 925 nfsm_postop_attr(newvp, attrflag); 926 nfsm_postop_attr(dvp, attrflag); 927 } else 928 nfsm_loadattr(newvp, (struct vattr *)0); 929 *vpp = newvp; 930 m_freem(mrep); 931 cnp->cn_flags |= SAVENAME; 932 if (!lockparent) { 933 VOP_UNLOCK(dvp, 0); 934 cnp->cn_flags |= PDIRUNLOCK; 935 } 936 return (0); 937 } 938 939 /* 940 * The postop attr handling is duplicated for each if case, 941 * because it should be done while dvp is locked (unlocking 942 * dvp is different for each case). 943 */ 944 945 if (NFS_CMPFH(np, fhp, fhsize)) { 946 /* 947 * "." lookup 948 */ 949 VREF(dvp); 950 newvp = dvp; 951 if (v3) { 952 nfsm_postop_attr(newvp, attrflag); 953 nfsm_postop_attr(dvp, attrflag); 954 } else 955 nfsm_loadattr(newvp, (struct vattr *)0); 956 } else if (flags & ISDOTDOT) { 957 /* 958 * ".." lookup 959 */ 960 VOP_UNLOCK(dvp, 0); 961 cnp->cn_flags |= PDIRUNLOCK; 962 963 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 964 if (error) { 965 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 966 cnp->cn_flags &= ~PDIRUNLOCK; 967 m_freem(mrep); 968 return error; 969 } 970 newvp = NFSTOV(np); 971 972 if (v3) { 973 nfsm_postop_attr(newvp, attrflag); 974 nfsm_postop_attr(dvp, attrflag); 975 } else 976 nfsm_loadattr(newvp, (struct vattr *)0); 977 978 if (lockparent && (flags & ISLASTCN)) { 979 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 980 m_freem(mrep); 981 vput(newvp); 982 return error; 983 } 984 cnp->cn_flags &= ~PDIRUNLOCK; 985 } 986 } else { 987 /* 988 * Other lookups. 989 */ 990 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 991 if (error) { 992 m_freem(mrep); 993 return error; 994 } 995 newvp = NFSTOV(np); 996 if (v3) { 997 nfsm_postop_attr(newvp, attrflag); 998 nfsm_postop_attr(dvp, attrflag); 999 } else 1000 nfsm_loadattr(newvp, (struct vattr *)0); 1001 if (!lockparent || !(flags & ISLASTCN)) { 1002 VOP_UNLOCK(dvp, 0); 1003 cnp->cn_flags |= PDIRUNLOCK; 1004 } 1005 } 1006 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1007 cnp->cn_flags |= SAVENAME; 1008 if ((cnp->cn_flags & MAKEENTRY) && 1009 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1010 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1011 cache_enter(dvp, newvp, cnp); 1012 } 1013 *vpp = newvp; 1014 nfsm_reqdone; 1015 if (error) { 1016 /* 1017 * We get here only because of errors returned by 1018 * the RPC. Otherwise we'll have returned above 1019 * (the nfsm_* macros will jump to nfsm_reqdone 1020 * on error). 1021 */ 1022 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1023 cnp->cn_nameiop != CREATE) { 1024 if (VTONFS(dvp)->n_nctime == 0) 1025 VTONFS(dvp)->n_nctime = 1026 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1027 cache_enter(dvp, NULL, cnp); 1028 } 1029 if (newvp != NULLVP) { 1030 vrele(newvp); 1031 if (newvp != dvp) 1032 VOP_UNLOCK(newvp, 0); 1033 } 1034 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1035 (flags & ISLASTCN) && error == ENOENT) { 1036 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1037 error = EROFS; 1038 else 1039 error = EJUSTRETURN; 1040 } 1041 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1042 cnp->cn_flags |= SAVENAME; 1043 *vpp = NULL; 1044 } 1045 1046 return error; 1047 } 1048 1049 /* 1050 * nfs read call. 1051 * Just call nfs_bioread() to do the work. 1052 */ 1053 int 1054 nfs_read(v) 1055 void *v; 1056 { 1057 struct vop_read_args /* { 1058 struct vnode *a_vp; 1059 struct uio *a_uio; 1060 int a_ioflag; 1061 struct ucred *a_cred; 1062 } */ *ap = v; 1063 struct vnode *vp = ap->a_vp; 1064 1065 if (vp->v_type != VREG) 1066 return (EPERM); 1067 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1068 } 1069 1070 /* 1071 * nfs readlink call 1072 */ 1073 int 1074 nfs_readlink(v) 1075 void *v; 1076 { 1077 struct vop_readlink_args /* { 1078 struct vnode *a_vp; 1079 struct uio *a_uio; 1080 struct ucred *a_cred; 1081 } */ *ap = v; 1082 struct vnode *vp = ap->a_vp; 1083 1084 if (vp->v_type != VLNK) 1085 return (EPERM); 1086 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1087 } 1088 1089 /* 1090 * Do a readlink rpc. 1091 * Called by nfs_doio() from below the buffer cache. 1092 */ 1093 int 1094 nfs_readlinkrpc(vp, uiop, cred) 1095 struct vnode *vp; 1096 struct uio *uiop; 1097 struct ucred *cred; 1098 { 1099 u_int32_t *tl; 1100 caddr_t cp; 1101 int32_t t1, t2; 1102 caddr_t bpos, dpos, cp2; 1103 int error = 0, len, attrflag; 1104 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1105 const int v3 = NFS_ISV3(vp); 1106 1107 nfsstats.rpccnt[NFSPROC_READLINK]++; 1108 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1109 nfsm_fhtom(vp, v3); 1110 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1111 if (v3) 1112 nfsm_postop_attr(vp, attrflag); 1113 if (!error) { 1114 nfsm_strsiz(len, NFS_MAXPATHLEN); 1115 nfsm_mtouio(uiop, len); 1116 } 1117 nfsm_reqdone; 1118 return (error); 1119 } 1120 1121 /* 1122 * nfs read rpc call 1123 * Ditto above 1124 */ 1125 int 1126 nfs_readrpc(vp, uiop) 1127 struct vnode *vp; 1128 struct uio *uiop; 1129 { 1130 u_int32_t *tl; 1131 caddr_t cp; 1132 int32_t t1, t2; 1133 caddr_t bpos, dpos, cp2; 1134 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1135 struct nfsmount *nmp; 1136 int error = 0, len, retlen, tsiz, eof, attrflag; 1137 const int v3 = NFS_ISV3(vp); 1138 1139 #ifndef nolint 1140 eof = 0; 1141 #endif 1142 nmp = VFSTONFS(vp->v_mount); 1143 tsiz = uiop->uio_resid; 1144 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1145 return (EFBIG); 1146 while (tsiz > 0) { 1147 nfsstats.rpccnt[NFSPROC_READ]++; 1148 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1149 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1150 nfsm_fhtom(vp, v3); 1151 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1152 if (v3) { 1153 txdr_hyper(uiop->uio_offset, tl); 1154 *(tl + 2) = txdr_unsigned(len); 1155 } else { 1156 *tl++ = txdr_unsigned(uiop->uio_offset); 1157 *tl++ = txdr_unsigned(len); 1158 *tl = 0; 1159 } 1160 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1161 VTONFS(vp)->n_rcred); 1162 if (v3) { 1163 nfsm_postop_attr(vp, attrflag); 1164 if (error) { 1165 m_freem(mrep); 1166 goto nfsmout; 1167 } 1168 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1169 eof = fxdr_unsigned(int, *(tl + 1)); 1170 } else 1171 nfsm_loadattr(vp, (struct vattr *)0); 1172 nfsm_strsiz(retlen, nmp->nm_rsize); 1173 nfsm_mtouio(uiop, retlen); 1174 m_freem(mrep); 1175 tsiz -= retlen; 1176 if (v3) { 1177 if (eof || retlen == 0) 1178 tsiz = 0; 1179 } else if (retlen < len) 1180 tsiz = 0; 1181 } 1182 nfsmout: 1183 return (error); 1184 } 1185 1186 /* 1187 * nfs write call 1188 */ 1189 int 1190 nfs_writerpc(vp, uiop, iomode, must_commit) 1191 struct vnode *vp; 1192 struct uio *uiop; 1193 int *iomode, *must_commit; 1194 { 1195 u_int32_t *tl; 1196 caddr_t cp; 1197 int32_t t1, t2, backup; 1198 caddr_t bpos, dpos, cp2; 1199 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1200 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1201 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1202 const int v3 = NFS_ISV3(vp); 1203 int committed = NFSV3WRITE_FILESYNC; 1204 1205 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1206 panic("writerpc readonly vp %p", vp); 1207 } 1208 1209 #ifndef DIAGNOSTIC 1210 if (uiop->uio_iovcnt != 1) 1211 panic("nfs: writerpc iovcnt > 1"); 1212 #endif 1213 *must_commit = 0; 1214 tsiz = uiop->uio_resid; 1215 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1216 return (EFBIG); 1217 while (tsiz > 0) { 1218 nfsstats.rpccnt[NFSPROC_WRITE]++; 1219 len = min(tsiz, nmp->nm_wsize); 1220 nfsm_reqhead(vp, NFSPROC_WRITE, 1221 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1222 nfsm_fhtom(vp, v3); 1223 if (v3) { 1224 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1225 txdr_hyper(uiop->uio_offset, tl); 1226 tl += 2; 1227 *tl++ = txdr_unsigned(len); 1228 *tl++ = txdr_unsigned(*iomode); 1229 *tl = txdr_unsigned(len); 1230 } else { 1231 u_int32_t x; 1232 1233 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1234 /* Set both "begin" and "current" to non-garbage. */ 1235 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1236 *tl++ = x; /* "begin offset" */ 1237 *tl++ = x; /* "current offset" */ 1238 x = txdr_unsigned(len); 1239 *tl++ = x; /* total to this offset */ 1240 *tl = x; /* size of this write */ 1241 1242 } 1243 nfsm_uiotom(uiop, len); 1244 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1245 VTONFS(vp)->n_wcred); 1246 if (v3) { 1247 wccflag = NFSV3_WCCCHK; 1248 nfsm_wcc_data(vp, wccflag); 1249 if (!error) { 1250 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1251 + NFSX_V3WRITEVERF); 1252 rlen = fxdr_unsigned(int, *tl++); 1253 if (rlen == 0) { 1254 error = NFSERR_IO; 1255 m_freem(mrep); 1256 break; 1257 } else if (rlen < len) { 1258 backup = len - rlen; 1259 uiop->uio_iov->iov_base = 1260 (caddr_t)uiop->uio_iov->iov_base - 1261 backup; 1262 uiop->uio_iov->iov_len += backup; 1263 uiop->uio_offset -= backup; 1264 uiop->uio_resid += backup; 1265 len = rlen; 1266 } 1267 commit = fxdr_unsigned(int, *tl++); 1268 1269 /* 1270 * Return the lowest committment level 1271 * obtained by any of the RPCs. 1272 */ 1273 if (committed == NFSV3WRITE_FILESYNC) 1274 committed = commit; 1275 else if (committed == NFSV3WRITE_DATASYNC && 1276 commit == NFSV3WRITE_UNSTABLE) 1277 committed = commit; 1278 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1279 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1280 NFSX_V3WRITEVERF); 1281 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1282 } else if (memcmp((caddr_t)tl, 1283 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1284 *must_commit = 1; 1285 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1286 NFSX_V3WRITEVERF); 1287 } 1288 } 1289 } else 1290 nfsm_loadattr(vp, (struct vattr *)0); 1291 if (wccflag) 1292 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1293 m_freem(mrep); 1294 if (error) 1295 break; 1296 tsiz -= len; 1297 } 1298 nfsmout: 1299 *iomode = committed; 1300 if (error) 1301 uiop->uio_resid = tsiz; 1302 return (error); 1303 } 1304 1305 /* 1306 * nfs mknod rpc 1307 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1308 * mode set to specify the file type and the size field for rdev. 1309 */ 1310 int 1311 nfs_mknodrpc(dvp, vpp, cnp, vap) 1312 struct vnode *dvp; 1313 struct vnode **vpp; 1314 struct componentname *cnp; 1315 struct vattr *vap; 1316 { 1317 struct nfsv2_sattr *sp; 1318 u_int32_t *tl; 1319 caddr_t cp; 1320 int32_t t1, t2; 1321 struct vnode *newvp = (struct vnode *)0; 1322 struct nfsnode *np; 1323 char *cp2; 1324 caddr_t bpos, dpos; 1325 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1326 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1327 u_int32_t rdev; 1328 const int v3 = NFS_ISV3(dvp); 1329 1330 if (vap->va_type == VCHR || vap->va_type == VBLK) 1331 rdev = txdr_unsigned(vap->va_rdev); 1332 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1333 rdev = nfs_xdrneg1; 1334 else { 1335 VOP_ABORTOP(dvp, cnp); 1336 vput(dvp); 1337 return (EOPNOTSUPP); 1338 } 1339 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1340 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1341 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1342 nfsm_fhtom(dvp, v3); 1343 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1344 if (v3) { 1345 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1346 *tl++ = vtonfsv3_type(vap->va_type); 1347 nfsm_v3attrbuild(vap, FALSE); 1348 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1349 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1350 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1351 *tl = txdr_unsigned(minor(vap->va_rdev)); 1352 } 1353 } else { 1354 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1355 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1356 sp->sa_uid = nfs_xdrneg1; 1357 sp->sa_gid = nfs_xdrneg1; 1358 sp->sa_size = rdev; 1359 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1360 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1361 } 1362 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1363 if (!error) { 1364 nfsm_mtofh(dvp, newvp, v3, gotvp); 1365 if (!gotvp) { 1366 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1367 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1368 if (!error) 1369 newvp = NFSTOV(np); 1370 } 1371 } 1372 if (v3) 1373 nfsm_wcc_data(dvp, wccflag); 1374 nfsm_reqdone; 1375 if (error) { 1376 if (newvp) 1377 vput(newvp); 1378 } else { 1379 if (cnp->cn_flags & MAKEENTRY) 1380 cache_enter(dvp, newvp, cnp); 1381 *vpp = newvp; 1382 } 1383 PNBUF_PUT(cnp->cn_pnbuf); 1384 VTONFS(dvp)->n_flag |= NMODIFIED; 1385 if (!wccflag) 1386 VTONFS(dvp)->n_attrstamp = 0; 1387 vput(dvp); 1388 return (error); 1389 } 1390 1391 /* 1392 * nfs mknod vop 1393 * just call nfs_mknodrpc() to do the work. 1394 */ 1395 /* ARGSUSED */ 1396 int 1397 nfs_mknod(v) 1398 void *v; 1399 { 1400 struct vop_mknod_args /* { 1401 struct vnode *a_dvp; 1402 struct vnode **a_vpp; 1403 struct componentname *a_cnp; 1404 struct vattr *a_vap; 1405 } */ *ap = v; 1406 struct vnode *newvp; 1407 int error; 1408 1409 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1410 return (error); 1411 } 1412 1413 static u_long create_verf; 1414 /* 1415 * nfs file create call 1416 */ 1417 int 1418 nfs_create(v) 1419 void *v; 1420 { 1421 struct vop_create_args /* { 1422 struct vnode *a_dvp; 1423 struct vnode **a_vpp; 1424 struct componentname *a_cnp; 1425 struct vattr *a_vap; 1426 } */ *ap = v; 1427 struct vnode *dvp = ap->a_dvp; 1428 struct vattr *vap = ap->a_vap; 1429 struct componentname *cnp = ap->a_cnp; 1430 struct nfsv2_sattr *sp; 1431 u_int32_t *tl; 1432 caddr_t cp; 1433 int32_t t1, t2; 1434 struct nfsnode *np = (struct nfsnode *)0; 1435 struct vnode *newvp = (struct vnode *)0; 1436 caddr_t bpos, dpos, cp2; 1437 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1438 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1439 const int v3 = NFS_ISV3(dvp); 1440 1441 /* 1442 * Oops, not for me.. 1443 */ 1444 if (vap->va_type == VSOCK) 1445 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1446 1447 #ifdef VA_EXCLUSIVE 1448 if (vap->va_vaflags & VA_EXCLUSIVE) 1449 fmode |= O_EXCL; 1450 #endif 1451 again: 1452 error = 0; 1453 nfsstats.rpccnt[NFSPROC_CREATE]++; 1454 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1455 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1456 nfsm_fhtom(dvp, v3); 1457 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1458 if (v3) { 1459 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1460 if (fmode & O_EXCL) { 1461 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1462 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1463 #ifdef INET 1464 if (in_ifaddr.tqh_first) 1465 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1466 else 1467 *tl++ = create_verf; 1468 #else 1469 *tl++ = create_verf; 1470 #endif 1471 *tl = ++create_verf; 1472 } else { 1473 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1474 nfsm_v3attrbuild(vap, FALSE); 1475 } 1476 } else { 1477 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1478 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1479 sp->sa_uid = nfs_xdrneg1; 1480 sp->sa_gid = nfs_xdrneg1; 1481 sp->sa_size = 0; 1482 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1483 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1484 } 1485 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1486 if (!error) { 1487 nfsm_mtofh(dvp, newvp, v3, gotvp); 1488 if (!gotvp) { 1489 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1490 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1491 if (!error) 1492 newvp = NFSTOV(np); 1493 } 1494 } 1495 if (v3) 1496 nfsm_wcc_data(dvp, wccflag); 1497 nfsm_reqdone; 1498 if (error) { 1499 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1500 fmode &= ~O_EXCL; 1501 goto again; 1502 } 1503 if (newvp) 1504 vput(newvp); 1505 } else if (v3 && (fmode & O_EXCL)) 1506 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1507 if (!error) { 1508 if (cnp->cn_flags & MAKEENTRY) 1509 cache_enter(dvp, newvp, cnp); 1510 *ap->a_vpp = newvp; 1511 } 1512 PNBUF_PUT(cnp->cn_pnbuf); 1513 VTONFS(dvp)->n_flag |= NMODIFIED; 1514 if (!wccflag) 1515 VTONFS(dvp)->n_attrstamp = 0; 1516 vput(dvp); 1517 return (error); 1518 } 1519 1520 /* 1521 * nfs file remove call 1522 * To try and make nfs semantics closer to ufs semantics, a file that has 1523 * other processes using the vnode is renamed instead of removed and then 1524 * removed later on the last close. 1525 * - If v_usecount > 1 1526 * If a rename is not already in the works 1527 * call nfs_sillyrename() to set it up 1528 * else 1529 * do the remove rpc 1530 */ 1531 int 1532 nfs_remove(v) 1533 void *v; 1534 { 1535 struct vop_remove_args /* { 1536 struct vnodeop_desc *a_desc; 1537 struct vnode * a_dvp; 1538 struct vnode * a_vp; 1539 struct componentname * a_cnp; 1540 } */ *ap = v; 1541 struct vnode *vp = ap->a_vp; 1542 struct vnode *dvp = ap->a_dvp; 1543 struct componentname *cnp = ap->a_cnp; 1544 struct nfsnode *np = VTONFS(vp); 1545 int error = 0; 1546 struct vattr vattr; 1547 1548 #ifndef DIAGNOSTIC 1549 if ((cnp->cn_flags & HASBUF) == 0) 1550 panic("nfs_remove: no name"); 1551 if (vp->v_usecount < 1) 1552 panic("nfs_remove: bad v_usecount"); 1553 #endif 1554 if (vp->v_type == VDIR) 1555 error = EPERM; 1556 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1557 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1558 vattr.va_nlink > 1)) { 1559 /* 1560 * Purge the name cache so that the chance of a lookup for 1561 * the name succeeding while the remove is in progress is 1562 * minimized. Without node locking it can still happen, such 1563 * that an I/O op returns ESTALE, but since you get this if 1564 * another host removes the file.. 1565 */ 1566 cache_purge(vp); 1567 /* 1568 * throw away biocache buffers, mainly to avoid 1569 * unnecessary delayed writes later. 1570 */ 1571 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1572 /* Do the rpc */ 1573 if (error != EINTR) 1574 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1575 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1576 /* 1577 * Kludge City: If the first reply to the remove rpc is lost.. 1578 * the reply to the retransmitted request will be ENOENT 1579 * since the file was in fact removed 1580 * Therefore, we cheat and return success. 1581 */ 1582 if (error == ENOENT) 1583 error = 0; 1584 } else if (!np->n_sillyrename) 1585 error = nfs_sillyrename(dvp, vp, cnp); 1586 PNBUF_PUT(cnp->cn_pnbuf); 1587 np->n_attrstamp = 0; 1588 vput(dvp); 1589 vput(vp); 1590 return (error); 1591 } 1592 1593 /* 1594 * nfs file remove rpc called from nfs_inactive 1595 */ 1596 int 1597 nfs_removeit(sp) 1598 struct sillyrename *sp; 1599 { 1600 1601 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1602 (struct proc *)0)); 1603 } 1604 1605 /* 1606 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1607 */ 1608 int 1609 nfs_removerpc(dvp, name, namelen, cred, proc) 1610 struct vnode *dvp; 1611 const char *name; 1612 int namelen; 1613 struct ucred *cred; 1614 struct proc *proc; 1615 { 1616 u_int32_t *tl; 1617 caddr_t cp; 1618 int32_t t1, t2; 1619 caddr_t bpos, dpos, cp2; 1620 int error = 0, wccflag = NFSV3_WCCRATTR; 1621 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1622 const int v3 = NFS_ISV3(dvp); 1623 1624 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1625 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1626 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1627 nfsm_fhtom(dvp, v3); 1628 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1629 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1630 if (v3) 1631 nfsm_wcc_data(dvp, wccflag); 1632 nfsm_reqdone; 1633 VTONFS(dvp)->n_flag |= NMODIFIED; 1634 if (!wccflag) 1635 VTONFS(dvp)->n_attrstamp = 0; 1636 return (error); 1637 } 1638 1639 /* 1640 * nfs file rename call 1641 */ 1642 int 1643 nfs_rename(v) 1644 void *v; 1645 { 1646 struct vop_rename_args /* { 1647 struct vnode *a_fdvp; 1648 struct vnode *a_fvp; 1649 struct componentname *a_fcnp; 1650 struct vnode *a_tdvp; 1651 struct vnode *a_tvp; 1652 struct componentname *a_tcnp; 1653 } */ *ap = v; 1654 struct vnode *fvp = ap->a_fvp; 1655 struct vnode *tvp = ap->a_tvp; 1656 struct vnode *fdvp = ap->a_fdvp; 1657 struct vnode *tdvp = ap->a_tdvp; 1658 struct componentname *tcnp = ap->a_tcnp; 1659 struct componentname *fcnp = ap->a_fcnp; 1660 int error; 1661 1662 #ifndef DIAGNOSTIC 1663 if ((tcnp->cn_flags & HASBUF) == 0 || 1664 (fcnp->cn_flags & HASBUF) == 0) 1665 panic("nfs_rename: no name"); 1666 #endif 1667 /* Check for cross-device rename */ 1668 if ((fvp->v_mount != tdvp->v_mount) || 1669 (tvp && (fvp->v_mount != tvp->v_mount))) { 1670 error = EXDEV; 1671 goto out; 1672 } 1673 1674 /* 1675 * If the tvp exists and is in use, sillyrename it before doing the 1676 * rename of the new file over it. 1677 */ 1678 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1679 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1680 vput(tvp); 1681 tvp = NULL; 1682 } 1683 1684 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1685 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1686 tcnp->cn_proc); 1687 1688 if (fvp->v_type == VDIR) { 1689 if (tvp != NULL && tvp->v_type == VDIR) 1690 cache_purge(tdvp); 1691 cache_purge(fdvp); 1692 } 1693 out: 1694 if (tdvp == tvp) 1695 vrele(tdvp); 1696 else 1697 vput(tdvp); 1698 if (tvp) 1699 vput(tvp); 1700 vrele(fdvp); 1701 vrele(fvp); 1702 /* 1703 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1704 */ 1705 if (error == ENOENT) 1706 error = 0; 1707 return (error); 1708 } 1709 1710 /* 1711 * nfs file rename rpc called from nfs_remove() above 1712 */ 1713 int 1714 nfs_renameit(sdvp, scnp, sp) 1715 struct vnode *sdvp; 1716 struct componentname *scnp; 1717 struct sillyrename *sp; 1718 { 1719 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1720 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1721 } 1722 1723 /* 1724 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1725 */ 1726 int 1727 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1728 struct vnode *fdvp; 1729 const char *fnameptr; 1730 int fnamelen; 1731 struct vnode *tdvp; 1732 const char *tnameptr; 1733 int tnamelen; 1734 struct ucred *cred; 1735 struct proc *proc; 1736 { 1737 u_int32_t *tl; 1738 caddr_t cp; 1739 int32_t t1, t2; 1740 caddr_t bpos, dpos, cp2; 1741 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1742 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1743 const int v3 = NFS_ISV3(fdvp); 1744 1745 nfsstats.rpccnt[NFSPROC_RENAME]++; 1746 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1747 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1748 nfsm_rndup(tnamelen)); 1749 nfsm_fhtom(fdvp, v3); 1750 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1751 nfsm_fhtom(tdvp, v3); 1752 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1753 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1754 if (v3) { 1755 nfsm_wcc_data(fdvp, fwccflag); 1756 nfsm_wcc_data(tdvp, twccflag); 1757 } 1758 nfsm_reqdone; 1759 VTONFS(fdvp)->n_flag |= NMODIFIED; 1760 VTONFS(tdvp)->n_flag |= NMODIFIED; 1761 if (!fwccflag) 1762 VTONFS(fdvp)->n_attrstamp = 0; 1763 if (!twccflag) 1764 VTONFS(tdvp)->n_attrstamp = 0; 1765 return (error); 1766 } 1767 1768 /* 1769 * nfs hard link create call 1770 */ 1771 int 1772 nfs_link(v) 1773 void *v; 1774 { 1775 struct vop_link_args /* { 1776 struct vnode *a_dvp; 1777 struct vnode *a_vp; 1778 struct componentname *a_cnp; 1779 } */ *ap = v; 1780 struct vnode *vp = ap->a_vp; 1781 struct vnode *dvp = ap->a_dvp; 1782 struct componentname *cnp = ap->a_cnp; 1783 u_int32_t *tl; 1784 caddr_t cp; 1785 int32_t t1, t2; 1786 caddr_t bpos, dpos, cp2; 1787 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1788 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1789 /* XXX Should be const and initialised? */ 1790 int v3; 1791 1792 if (dvp->v_mount != vp->v_mount) { 1793 VOP_ABORTOP(vp, cnp); 1794 vput(dvp); 1795 return (EXDEV); 1796 } 1797 if (dvp != vp) { 1798 error = vn_lock(vp, LK_EXCLUSIVE); 1799 if (error != 0) { 1800 VOP_ABORTOP(dvp, cnp); 1801 vput(dvp); 1802 return error; 1803 } 1804 } 1805 1806 /* 1807 * Push all writes to the server, so that the attribute cache 1808 * doesn't get "out of sync" with the server. 1809 * XXX There should be a better way! 1810 */ 1811 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1812 1813 v3 = NFS_ISV3(vp); 1814 nfsstats.rpccnt[NFSPROC_LINK]++; 1815 nfsm_reqhead(vp, NFSPROC_LINK, 1816 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1817 nfsm_fhtom(vp, v3); 1818 nfsm_fhtom(dvp, v3); 1819 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1820 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1821 if (v3) { 1822 nfsm_postop_attr(vp, attrflag); 1823 nfsm_wcc_data(dvp, wccflag); 1824 } 1825 nfsm_reqdone; 1826 PNBUF_PUT(cnp->cn_pnbuf); 1827 VTONFS(dvp)->n_flag |= NMODIFIED; 1828 if (!attrflag) 1829 VTONFS(vp)->n_attrstamp = 0; 1830 if (!wccflag) 1831 VTONFS(dvp)->n_attrstamp = 0; 1832 if (dvp != vp) 1833 VOP_UNLOCK(vp, 0); 1834 vput(dvp); 1835 /* 1836 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1837 */ 1838 if (error == EEXIST) 1839 error = 0; 1840 return (error); 1841 } 1842 1843 /* 1844 * nfs symbolic link create call 1845 */ 1846 int 1847 nfs_symlink(v) 1848 void *v; 1849 { 1850 struct vop_symlink_args /* { 1851 struct vnode *a_dvp; 1852 struct vnode **a_vpp; 1853 struct componentname *a_cnp; 1854 struct vattr *a_vap; 1855 char *a_target; 1856 } */ *ap = v; 1857 struct vnode *dvp = ap->a_dvp; 1858 struct vattr *vap = ap->a_vap; 1859 struct componentname *cnp = ap->a_cnp; 1860 struct nfsv2_sattr *sp; 1861 u_int32_t *tl; 1862 caddr_t cp; 1863 int32_t t1, t2; 1864 caddr_t bpos, dpos, cp2; 1865 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1866 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1867 struct vnode *newvp = (struct vnode *)0; 1868 const int v3 = NFS_ISV3(dvp); 1869 1870 *ap->a_vpp = NULL; 1871 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1872 slen = strlen(ap->a_target); 1873 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1874 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1875 nfsm_fhtom(dvp, v3); 1876 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1877 if (v3) 1878 nfsm_v3attrbuild(vap, FALSE); 1879 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1880 if (!v3) { 1881 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1882 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1883 sp->sa_uid = nfs_xdrneg1; 1884 sp->sa_gid = nfs_xdrneg1; 1885 sp->sa_size = nfs_xdrneg1; 1886 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1887 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1888 } 1889 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1890 if (v3) { 1891 if (!error) 1892 nfsm_mtofh(dvp, newvp, v3, gotvp); 1893 nfsm_wcc_data(dvp, wccflag); 1894 } 1895 nfsm_reqdone; 1896 /* 1897 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1898 */ 1899 if (error == EEXIST) 1900 error = 0; 1901 if (error == 0 && newvp == NULL) { 1902 struct nfsnode *np = NULL; 1903 1904 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1905 cnp->cn_cred, cnp->cn_proc, &np); 1906 if (error == 0) 1907 newvp = NFSTOV(np); 1908 } 1909 if (error) { 1910 if (newvp != NULL) 1911 vput(newvp); 1912 } else { 1913 *ap->a_vpp = newvp; 1914 } 1915 PNBUF_PUT(cnp->cn_pnbuf); 1916 VTONFS(dvp)->n_flag |= NMODIFIED; 1917 if (!wccflag) 1918 VTONFS(dvp)->n_attrstamp = 0; 1919 vput(dvp); 1920 return (error); 1921 } 1922 1923 /* 1924 * nfs make dir call 1925 */ 1926 int 1927 nfs_mkdir(v) 1928 void *v; 1929 { 1930 struct vop_mkdir_args /* { 1931 struct vnode *a_dvp; 1932 struct vnode **a_vpp; 1933 struct componentname *a_cnp; 1934 struct vattr *a_vap; 1935 } */ *ap = v; 1936 struct vnode *dvp = ap->a_dvp; 1937 struct vattr *vap = ap->a_vap; 1938 struct componentname *cnp = ap->a_cnp; 1939 struct nfsv2_sattr *sp; 1940 u_int32_t *tl; 1941 caddr_t cp; 1942 int32_t t1, t2; 1943 int len; 1944 struct nfsnode *np = (struct nfsnode *)0; 1945 struct vnode *newvp = (struct vnode *)0; 1946 caddr_t bpos, dpos, cp2; 1947 int error = 0, wccflag = NFSV3_WCCRATTR; 1948 int gotvp = 0; 1949 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1950 const int v3 = NFS_ISV3(dvp); 1951 1952 len = cnp->cn_namelen; 1953 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1954 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1955 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1956 nfsm_fhtom(dvp, v3); 1957 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1958 if (v3) { 1959 nfsm_v3attrbuild(vap, FALSE); 1960 } else { 1961 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1962 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1963 sp->sa_uid = nfs_xdrneg1; 1964 sp->sa_gid = nfs_xdrneg1; 1965 sp->sa_size = nfs_xdrneg1; 1966 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1967 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1968 } 1969 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1970 if (!error) 1971 nfsm_mtofh(dvp, newvp, v3, gotvp); 1972 if (v3) 1973 nfsm_wcc_data(dvp, wccflag); 1974 nfsm_reqdone; 1975 VTONFS(dvp)->n_flag |= NMODIFIED; 1976 if (!wccflag) 1977 VTONFS(dvp)->n_attrstamp = 0; 1978 /* 1979 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1980 * if we can succeed in looking up the directory. 1981 */ 1982 if (error == EEXIST || (!error && !gotvp)) { 1983 if (newvp) { 1984 vput(newvp); 1985 newvp = (struct vnode *)0; 1986 } 1987 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1988 cnp->cn_proc, &np); 1989 if (!error) { 1990 newvp = NFSTOV(np); 1991 if (newvp->v_type != VDIR) 1992 error = EEXIST; 1993 } 1994 } 1995 if (error) { 1996 if (newvp) 1997 vput(newvp); 1998 } else { 1999 if (cnp->cn_flags & MAKEENTRY) 2000 cache_enter(dvp, newvp, cnp); 2001 *ap->a_vpp = newvp; 2002 } 2003 PNBUF_PUT(cnp->cn_pnbuf); 2004 vput(dvp); 2005 return (error); 2006 } 2007 2008 /* 2009 * nfs remove directory call 2010 */ 2011 int 2012 nfs_rmdir(v) 2013 void *v; 2014 { 2015 struct vop_rmdir_args /* { 2016 struct vnode *a_dvp; 2017 struct vnode *a_vp; 2018 struct componentname *a_cnp; 2019 } */ *ap = v; 2020 struct vnode *vp = ap->a_vp; 2021 struct vnode *dvp = ap->a_dvp; 2022 struct componentname *cnp = ap->a_cnp; 2023 u_int32_t *tl; 2024 caddr_t cp; 2025 int32_t t1, t2; 2026 caddr_t bpos, dpos, cp2; 2027 int error = 0, wccflag = NFSV3_WCCRATTR; 2028 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2029 const int v3 = NFS_ISV3(dvp); 2030 2031 if (dvp == vp) { 2032 vrele(dvp); 2033 vput(dvp); 2034 PNBUF_PUT(cnp->cn_pnbuf); 2035 return (EINVAL); 2036 } 2037 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2038 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2039 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2040 nfsm_fhtom(dvp, v3); 2041 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2042 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2043 if (v3) 2044 nfsm_wcc_data(dvp, wccflag); 2045 nfsm_reqdone; 2046 PNBUF_PUT(cnp->cn_pnbuf); 2047 VTONFS(dvp)->n_flag |= NMODIFIED; 2048 if (!wccflag) 2049 VTONFS(dvp)->n_attrstamp = 0; 2050 cache_purge(dvp); 2051 cache_purge(vp); 2052 vput(vp); 2053 vput(dvp); 2054 /* 2055 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2056 */ 2057 if (error == ENOENT) 2058 error = 0; 2059 return (error); 2060 } 2061 2062 /* 2063 * nfs readdir call 2064 */ 2065 int 2066 nfs_readdir(v) 2067 void *v; 2068 { 2069 struct vop_readdir_args /* { 2070 struct vnode *a_vp; 2071 struct uio *a_uio; 2072 struct ucred *a_cred; 2073 int *a_eofflag; 2074 off_t **a_cookies; 2075 int *a_ncookies; 2076 } */ *ap = v; 2077 struct vnode *vp = ap->a_vp; 2078 struct uio *uio = ap->a_uio; 2079 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2080 char *base = uio->uio_iov->iov_base; 2081 int tresid, error; 2082 size_t count, lost; 2083 struct dirent *dp; 2084 off_t *cookies = NULL; 2085 int ncookies = 0, nc; 2086 2087 if (vp->v_type != VDIR) 2088 return (EPERM); 2089 2090 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2091 count = uio->uio_resid - lost; 2092 if (count <= 0) 2093 return (EINVAL); 2094 2095 /* 2096 * Call nfs_bioread() to do the real work. 2097 */ 2098 tresid = uio->uio_resid = count; 2099 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2100 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2101 2102 if (!error && ap->a_cookies) { 2103 ncookies = count / 16; 2104 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2105 *ap->a_cookies = cookies; 2106 } 2107 2108 if (!error && uio->uio_resid == tresid) { 2109 uio->uio_resid += lost; 2110 nfsstats.direofcache_misses++; 2111 if (ap->a_cookies) 2112 *ap->a_ncookies = 0; 2113 *ap->a_eofflag = 1; 2114 return (0); 2115 } 2116 2117 if (!error && ap->a_cookies) { 2118 /* 2119 * Only the NFS server and emulations use cookies, and they 2120 * load the directory block into system space, so we can 2121 * just look at it directly. 2122 */ 2123 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2124 panic("nfs_readdir: lost in space"); 2125 for (nc = 0; ncookies-- && 2126 base < (char *)uio->uio_iov->iov_base; nc++){ 2127 dp = (struct dirent *) base; 2128 if (dp->d_reclen == 0) 2129 break; 2130 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2131 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2132 else 2133 *(cookies++) = NFS_GETCOOKIE(dp); 2134 base += dp->d_reclen; 2135 } 2136 uio->uio_resid += 2137 ((caddr_t)uio->uio_iov->iov_base - base); 2138 uio->uio_iov->iov_len += 2139 ((caddr_t)uio->uio_iov->iov_base - base); 2140 uio->uio_iov->iov_base = base; 2141 *ap->a_ncookies = nc; 2142 } 2143 2144 uio->uio_resid += lost; 2145 *ap->a_eofflag = 0; 2146 return (error); 2147 } 2148 2149 /* 2150 * Readdir rpc call. 2151 * Called from below the buffer cache by nfs_doio(). 2152 */ 2153 int 2154 nfs_readdirrpc(vp, uiop, cred) 2155 struct vnode *vp; 2156 struct uio *uiop; 2157 struct ucred *cred; 2158 { 2159 int len, left; 2160 struct dirent *dp = NULL; 2161 u_int32_t *tl; 2162 caddr_t cp; 2163 int32_t t1, t2; 2164 caddr_t bpos, dpos, cp2; 2165 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2166 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2167 struct nfsnode *dnp = VTONFS(vp); 2168 u_quad_t fileno; 2169 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2170 int attrflag, nrpcs = 0, reclen; 2171 const int v3 = NFS_ISV3(vp); 2172 nfsquad_t cookie; 2173 2174 #ifdef DIAGNOSTIC 2175 /* 2176 * Should be called from buffer cache, so only amount of 2177 * NFS_DIRBLKSIZ will be requested. 2178 */ 2179 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2180 panic("nfs readdirrpc bad uio"); 2181 #endif 2182 2183 /* 2184 * Loop around doing readdir rpc's of size nm_readdirsize 2185 * truncated to a multiple of NFS_DIRFRAGSIZ. 2186 * The stopping criteria is EOF or buffer full. 2187 */ 2188 while (more_dirs && bigenough) { 2189 /* 2190 * Heuristic: don't bother to do another RPC to further 2191 * fill up this block if there is not much room left. (< 50% 2192 * of the readdir RPC size). This wastes some buffer space 2193 * but can save up to 50% in RPC calls. 2194 */ 2195 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2196 bigenough = 0; 2197 break; 2198 } 2199 nfsstats.rpccnt[NFSPROC_READDIR]++; 2200 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2201 NFSX_READDIR(v3)); 2202 nfsm_fhtom(vp, v3); 2203 if (v3) { 2204 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2205 cookie.qval = uiop->uio_offset; 2206 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2207 txdr_swapcookie3(uiop->uio_offset, tl); 2208 } else { 2209 txdr_cookie3(uiop->uio_offset, tl); 2210 } 2211 tl += 2; 2212 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2213 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2214 } else { 2215 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2216 *tl++ = txdr_unsigned(uiop->uio_offset); 2217 } 2218 *tl = txdr_unsigned(nmp->nm_readdirsize); 2219 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2220 nrpcs++; 2221 if (v3) { 2222 nfsm_postop_attr(vp, attrflag); 2223 if (!error) { 2224 nfsm_dissect(tl, u_int32_t *, 2225 2 * NFSX_UNSIGNED); 2226 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2227 dnp->n_cookieverf.nfsuquad[1] = *tl; 2228 } else { 2229 m_freem(mrep); 2230 goto nfsmout; 2231 } 2232 } 2233 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2234 more_dirs = fxdr_unsigned(int, *tl); 2235 2236 /* loop thru the dir entries, doctoring them to 4bsd form */ 2237 while (more_dirs && bigenough) { 2238 if (v3) { 2239 nfsm_dissect(tl, u_int32_t *, 2240 3 * NFSX_UNSIGNED); 2241 fileno = fxdr_hyper(tl); 2242 len = fxdr_unsigned(int, *(tl + 2)); 2243 } else { 2244 nfsm_dissect(tl, u_int32_t *, 2245 2 * NFSX_UNSIGNED); 2246 fileno = fxdr_unsigned(u_quad_t, *tl++); 2247 len = fxdr_unsigned(int, *tl); 2248 } 2249 if (len <= 0 || len > NFS_MAXNAMLEN) { 2250 error = EBADRPC; 2251 m_freem(mrep); 2252 goto nfsmout; 2253 } 2254 tlen = nfsm_rndup(len); 2255 if (tlen == len) 2256 tlen += 4; /* To ensure null termination */ 2257 tlen += sizeof (off_t) + sizeof (int); 2258 reclen = ALIGN(tlen + DIRHDSIZ); 2259 tlen = reclen - DIRHDSIZ; 2260 left = NFS_DIRFRAGSIZ - blksiz; 2261 if (reclen > left) { 2262 dp->d_reclen += left; 2263 uiop->uio_iov->iov_base = 2264 (caddr_t)uiop->uio_iov->iov_base + left; 2265 uiop->uio_iov->iov_len -= left; 2266 uiop->uio_resid -= left; 2267 blksiz = 0; 2268 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2269 } 2270 if (reclen > uiop->uio_resid) 2271 bigenough = 0; 2272 if (bigenough) { 2273 dp = (struct dirent *)uiop->uio_iov->iov_base; 2274 dp->d_fileno = (int)fileno; 2275 dp->d_namlen = len; 2276 dp->d_reclen = reclen; 2277 dp->d_type = DT_UNKNOWN; 2278 blksiz += dp->d_reclen; 2279 if (blksiz == NFS_DIRFRAGSIZ) 2280 blksiz = 0; 2281 uiop->uio_resid -= DIRHDSIZ; 2282 uiop->uio_iov->iov_base = 2283 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2284 uiop->uio_iov->iov_len -= DIRHDSIZ; 2285 nfsm_mtouio(uiop, len); 2286 cp = uiop->uio_iov->iov_base; 2287 tlen -= len; 2288 *cp = '\0'; /* null terminate */ 2289 uiop->uio_iov->iov_base = 2290 (caddr_t)uiop->uio_iov->iov_base + tlen; 2291 uiop->uio_iov->iov_len -= tlen; 2292 uiop->uio_resid -= tlen; 2293 } else 2294 nfsm_adv(nfsm_rndup(len)); 2295 if (v3) { 2296 nfsm_dissect(tl, u_int32_t *, 2297 3 * NFSX_UNSIGNED); 2298 } else { 2299 nfsm_dissect(tl, u_int32_t *, 2300 2 * NFSX_UNSIGNED); 2301 } 2302 if (bigenough) { 2303 if (v3) { 2304 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2305 uiop->uio_offset = 2306 fxdr_swapcookie3(tl); 2307 else 2308 uiop->uio_offset = 2309 fxdr_cookie3(tl); 2310 } 2311 else { 2312 uiop->uio_offset = 2313 fxdr_unsigned(off_t, *tl); 2314 } 2315 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2316 } 2317 if (v3) 2318 tl += 2; 2319 else 2320 tl++; 2321 more_dirs = fxdr_unsigned(int, *tl); 2322 } 2323 /* 2324 * If at end of rpc data, get the eof boolean 2325 */ 2326 if (!more_dirs) { 2327 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2328 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2329 } 2330 m_freem(mrep); 2331 } 2332 /* 2333 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2334 * by increasing d_reclen for the last record. 2335 */ 2336 if (blksiz > 0) { 2337 left = NFS_DIRFRAGSIZ - blksiz; 2338 dp->d_reclen += left; 2339 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2340 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2341 left; 2342 uiop->uio_iov->iov_len -= left; 2343 uiop->uio_resid -= left; 2344 } 2345 2346 /* 2347 * We are now either at the end of the directory or have filled the 2348 * block. 2349 */ 2350 if (bigenough) 2351 dnp->n_direofoffset = uiop->uio_offset; 2352 nfsmout: 2353 return (error); 2354 } 2355 2356 /* 2357 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2358 */ 2359 int 2360 nfs_readdirplusrpc(vp, uiop, cred) 2361 struct vnode *vp; 2362 struct uio *uiop; 2363 struct ucred *cred; 2364 { 2365 int len, left; 2366 struct dirent *dp = NULL; 2367 u_int32_t *tl; 2368 caddr_t cp; 2369 int32_t t1, t2; 2370 struct vnode *newvp; 2371 caddr_t bpos, dpos, cp2; 2372 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2373 struct nameidata nami, *ndp = &nami; 2374 struct componentname *cnp = &ndp->ni_cnd; 2375 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2376 struct nfsnode *dnp = VTONFS(vp), *np; 2377 const unsigned char *hcp; 2378 nfsfh_t *fhp; 2379 u_quad_t fileno; 2380 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2381 int attrflag, fhsize, nrpcs = 0, reclen; 2382 struct nfs_fattr fattr, *fp; 2383 2384 #ifdef DIAGNOSTIC 2385 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2386 panic("nfs readdirplusrpc bad uio"); 2387 #endif 2388 ndp->ni_dvp = vp; 2389 newvp = NULLVP; 2390 2391 /* 2392 * Loop around doing readdir rpc's of size nm_readdirsize 2393 * truncated to a multiple of NFS_DIRFRAGSIZ. 2394 * The stopping criteria is EOF or buffer full. 2395 */ 2396 while (more_dirs && bigenough) { 2397 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2398 bigenough = 0; 2399 break; 2400 } 2401 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2402 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2403 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2404 nfsm_fhtom(vp, 1); 2405 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2406 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2407 txdr_swapcookie3(uiop->uio_offset, tl); 2408 } else { 2409 txdr_cookie3(uiop->uio_offset, tl); 2410 } 2411 tl += 2; 2412 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2413 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2414 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2415 *tl = txdr_unsigned(nmp->nm_rsize); 2416 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2417 nfsm_postop_attr(vp, attrflag); 2418 if (error) { 2419 m_freem(mrep); 2420 goto nfsmout; 2421 } 2422 nrpcs++; 2423 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2424 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2425 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2426 more_dirs = fxdr_unsigned(int, *tl); 2427 2428 /* loop thru the dir entries, doctoring them to 4bsd form */ 2429 while (more_dirs && bigenough) { 2430 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2431 fileno = fxdr_hyper(tl); 2432 len = fxdr_unsigned(int, *(tl + 2)); 2433 if (len <= 0 || len > NFS_MAXNAMLEN) { 2434 error = EBADRPC; 2435 m_freem(mrep); 2436 goto nfsmout; 2437 } 2438 tlen = nfsm_rndup(len); 2439 if (tlen == len) 2440 tlen += 4; /* To ensure null termination*/ 2441 tlen += sizeof (off_t) + sizeof (int); 2442 reclen = ALIGN(tlen + DIRHDSIZ); 2443 tlen = reclen - DIRHDSIZ; 2444 left = NFS_DIRFRAGSIZ - blksiz; 2445 if (reclen > left) { 2446 /* 2447 * DIRFRAGSIZ is aligned, no need to align 2448 * again here. 2449 */ 2450 dp->d_reclen += left; 2451 uiop->uio_iov->iov_base = 2452 (caddr_t)uiop->uio_iov->iov_base + left; 2453 uiop->uio_iov->iov_len -= left; 2454 uiop->uio_resid -= left; 2455 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2456 blksiz = 0; 2457 } 2458 if (reclen > uiop->uio_resid) 2459 bigenough = 0; 2460 if (bigenough) { 2461 dp = (struct dirent *)uiop->uio_iov->iov_base; 2462 dp->d_fileno = (int)fileno; 2463 dp->d_namlen = len; 2464 dp->d_reclen = reclen; 2465 dp->d_type = DT_UNKNOWN; 2466 blksiz += dp->d_reclen; 2467 if (blksiz == NFS_DIRFRAGSIZ) 2468 blksiz = 0; 2469 uiop->uio_resid -= DIRHDSIZ; 2470 uiop->uio_iov->iov_base = 2471 (caddr_t)uiop->uio_iov->iov_base + 2472 DIRHDSIZ; 2473 uiop->uio_iov->iov_len -= DIRHDSIZ; 2474 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2475 cnp->cn_namelen = len; 2476 nfsm_mtouio(uiop, len); 2477 cp = uiop->uio_iov->iov_base; 2478 tlen -= len; 2479 *cp = '\0'; 2480 uiop->uio_iov->iov_base = 2481 (caddr_t)uiop->uio_iov->iov_base + tlen; 2482 uiop->uio_iov->iov_len -= tlen; 2483 uiop->uio_resid -= tlen; 2484 } else 2485 nfsm_adv(nfsm_rndup(len)); 2486 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2487 if (bigenough) { 2488 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2489 uiop->uio_offset = 2490 fxdr_swapcookie3(tl); 2491 else 2492 uiop->uio_offset = 2493 fxdr_cookie3(tl); 2494 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2495 } 2496 tl += 2; 2497 2498 /* 2499 * Since the attributes are before the file handle 2500 * (sigh), we must skip over the attributes and then 2501 * come back and get them. 2502 */ 2503 attrflag = fxdr_unsigned(int, *tl); 2504 if (attrflag) { 2505 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2506 memcpy(&fattr, fp, NFSX_V3FATTR); 2507 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2508 doit = fxdr_unsigned(int, *tl); 2509 if (doit) { 2510 nfsm_getfh(fhp, fhsize, 1); 2511 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2512 VREF(vp); 2513 newvp = vp; 2514 np = dnp; 2515 } else { 2516 error = nfs_nget(vp->v_mount, fhp, 2517 fhsize, &np); 2518 if (!error) 2519 newvp = NFSTOV(np); 2520 } 2521 if (!error) { 2522 nfs_loadattrcache(&newvp, &fattr, 0); 2523 dp->d_type = 2524 IFTODT(VTTOIF(np->n_vattr->va_type)); 2525 ndp->ni_vp = newvp; 2526 cnp->cn_hash = 0; 2527 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2528 i++, hcp++) 2529 cnp->cn_hash += *hcp * i; 2530 if (cnp->cn_namelen <= NCHNAMLEN) 2531 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2532 cnp); 2533 } 2534 } 2535 } else { 2536 /* Just skip over the file handle */ 2537 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2538 i = fxdr_unsigned(int, *tl); 2539 nfsm_adv(nfsm_rndup(i)); 2540 } 2541 if (newvp != NULLVP) { 2542 vrele(newvp); 2543 if (newvp != vp) 2544 VOP_UNLOCK(vp, 0); 2545 newvp = NULLVP; 2546 } 2547 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2548 more_dirs = fxdr_unsigned(int, *tl); 2549 } 2550 /* 2551 * If at end of rpc data, get the eof boolean 2552 */ 2553 if (!more_dirs) { 2554 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2555 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2556 } 2557 m_freem(mrep); 2558 } 2559 /* 2560 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2561 * by increasing d_reclen for the last record. 2562 */ 2563 if (blksiz > 0) { 2564 left = NFS_DIRFRAGSIZ - blksiz; 2565 dp->d_reclen += left; 2566 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2567 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2568 left; 2569 uiop->uio_iov->iov_len -= left; 2570 uiop->uio_resid -= left; 2571 } 2572 2573 /* 2574 * We are now either at the end of the directory or have filled the 2575 * block. 2576 */ 2577 if (bigenough) 2578 dnp->n_direofoffset = uiop->uio_offset; 2579 nfsmout: 2580 if (newvp != NULLVP) { 2581 vrele(newvp); 2582 if (newvp != vp) 2583 VOP_UNLOCK(vp, 0); 2584 } 2585 return (error); 2586 } 2587 static char hextoasc[] = "0123456789abcdef"; 2588 2589 /* 2590 * Silly rename. To make the NFS filesystem that is stateless look a little 2591 * more like the "ufs" a remove of an active vnode is translated to a rename 2592 * to a funny looking filename that is removed by nfs_inactive on the 2593 * nfsnode. There is the potential for another process on a different client 2594 * to create the same funny name between the nfs_lookitup() fails and the 2595 * nfs_rename() completes, but... 2596 */ 2597 int 2598 nfs_sillyrename(dvp, vp, cnp) 2599 struct vnode *dvp, *vp; 2600 struct componentname *cnp; 2601 { 2602 struct sillyrename *sp; 2603 struct nfsnode *np; 2604 int error; 2605 short pid; 2606 2607 cache_purge(dvp); 2608 np = VTONFS(vp); 2609 #ifndef DIAGNOSTIC 2610 if (vp->v_type == VDIR) 2611 panic("nfs: sillyrename dir"); 2612 #endif 2613 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2614 M_NFSREQ, M_WAITOK); 2615 sp->s_cred = crdup(cnp->cn_cred); 2616 sp->s_dvp = dvp; 2617 VREF(dvp); 2618 2619 /* Fudge together a funny name */ 2620 pid = cnp->cn_proc->p_pid; 2621 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2622 sp->s_namlen = 12; 2623 sp->s_name[8] = hextoasc[pid & 0xf]; 2624 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2625 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2626 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2627 2628 /* Try lookitups until we get one that isn't there */ 2629 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2630 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2631 sp->s_name[4]++; 2632 if (sp->s_name[4] > 'z') { 2633 error = EINVAL; 2634 goto bad; 2635 } 2636 } 2637 error = nfs_renameit(dvp, cnp, sp); 2638 if (error) 2639 goto bad; 2640 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2641 cnp->cn_proc, &np); 2642 np->n_sillyrename = sp; 2643 return (0); 2644 bad: 2645 vrele(sp->s_dvp); 2646 crfree(sp->s_cred); 2647 free((caddr_t)sp, M_NFSREQ); 2648 return (error); 2649 } 2650 2651 /* 2652 * Look up a file name and optionally either update the file handle or 2653 * allocate an nfsnode, depending on the value of npp. 2654 * npp == NULL --> just do the lookup 2655 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2656 * handled too 2657 * *npp != NULL --> update the file handle in the vnode 2658 */ 2659 int 2660 nfs_lookitup(dvp, name, len, cred, procp, npp) 2661 struct vnode *dvp; 2662 const char *name; 2663 int len; 2664 struct ucred *cred; 2665 struct proc *procp; 2666 struct nfsnode **npp; 2667 { 2668 u_int32_t *tl; 2669 caddr_t cp; 2670 int32_t t1, t2; 2671 struct vnode *newvp = (struct vnode *)0; 2672 struct nfsnode *np, *dnp = VTONFS(dvp); 2673 caddr_t bpos, dpos, cp2; 2674 int error = 0, fhlen, attrflag; 2675 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2676 nfsfh_t *nfhp; 2677 const int v3 = NFS_ISV3(dvp); 2678 2679 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2680 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2681 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2682 nfsm_fhtom(dvp, v3); 2683 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2684 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2685 if (npp && !error) { 2686 nfsm_getfh(nfhp, fhlen, v3); 2687 if (*npp) { 2688 np = *npp; 2689 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2690 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2691 np->n_fhp = &np->n_fh; 2692 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2693 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2694 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2695 np->n_fhsize = fhlen; 2696 newvp = NFSTOV(np); 2697 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2698 VREF(dvp); 2699 newvp = dvp; 2700 } else { 2701 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2702 if (error) { 2703 m_freem(mrep); 2704 return (error); 2705 } 2706 newvp = NFSTOV(np); 2707 } 2708 if (v3) { 2709 nfsm_postop_attr(newvp, attrflag); 2710 if (!attrflag && *npp == NULL) { 2711 m_freem(mrep); 2712 vput(newvp); 2713 return (ENOENT); 2714 } 2715 } else 2716 nfsm_loadattr(newvp, (struct vattr *)0); 2717 } 2718 nfsm_reqdone; 2719 if (npp && *npp == NULL) { 2720 if (error) { 2721 if (newvp) 2722 vput(newvp); 2723 } else 2724 *npp = np; 2725 } 2726 return (error); 2727 } 2728 2729 /* 2730 * Nfs Version 3 commit rpc 2731 */ 2732 int 2733 nfs_commit(vp, offset, cnt, procp) 2734 struct vnode *vp; 2735 off_t offset; 2736 uint32_t cnt; 2737 struct proc *procp; 2738 { 2739 caddr_t cp; 2740 u_int32_t *tl; 2741 int32_t t1, t2; 2742 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2743 caddr_t bpos, dpos, cp2; 2744 int error = 0, wccflag = NFSV3_WCCRATTR; 2745 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2746 2747 #ifdef fvdl_debug 2748 printf("commit %lu - %lu\n", (unsigned long)offset, 2749 (unsigned long)(offset + cnt)); 2750 #endif 2751 2752 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2753 return (0); 2754 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2755 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2756 nfsm_fhtom(vp, 1); 2757 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2758 txdr_hyper(offset, tl); 2759 tl += 2; 2760 *tl = txdr_unsigned(cnt); 2761 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2762 nfsm_wcc_data(vp, wccflag); 2763 if (!error) { 2764 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2765 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2766 NFSX_V3WRITEVERF)) { 2767 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2768 NFSX_V3WRITEVERF); 2769 error = NFSERR_STALEWRITEVERF; 2770 } 2771 } 2772 nfsm_reqdone; 2773 return (error); 2774 } 2775 2776 /* 2777 * Kludge City.. 2778 * - make nfs_bmap() essentially a no-op that does no translation 2779 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2780 * (Maybe I could use the process's page mapping, but I was concerned that 2781 * Kernel Write might not be enabled and also figured copyout() would do 2782 * a lot more work than memcpy() and also it currently happens in the 2783 * context of the swapper process (2). 2784 */ 2785 int 2786 nfs_bmap(v) 2787 void *v; 2788 { 2789 struct vop_bmap_args /* { 2790 struct vnode *a_vp; 2791 daddr_t a_bn; 2792 struct vnode **a_vpp; 2793 daddr_t *a_bnp; 2794 int *a_runp; 2795 } */ *ap = v; 2796 struct vnode *vp = ap->a_vp; 2797 2798 /* 2799 * XXX vpp should be returned unlocked? 2800 */ 2801 if (ap->a_vpp != NULL) 2802 *ap->a_vpp = vp; 2803 if (ap->a_bnp != NULL) 2804 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2805 return (0); 2806 } 2807 2808 /* 2809 * Strategy routine. 2810 * For async requests when nfsiod(s) are running, queue the request by 2811 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2812 * request. 2813 */ 2814 int 2815 nfs_strategy(v) 2816 void *v; 2817 { 2818 struct vop_strategy_args *ap = v; 2819 struct buf *bp = ap->a_bp; 2820 struct proc *p; 2821 int error = 0; 2822 2823 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2824 panic("nfs physio/async"); 2825 if (bp->b_flags & B_ASYNC) 2826 p = NULL; 2827 else 2828 p = curproc; /* XXX */ 2829 2830 /* 2831 * If the op is asynchronous and an i/o daemon is waiting 2832 * queue the request, wake it up and wait for completion 2833 * otherwise just do it ourselves. 2834 */ 2835 2836 if ((bp->b_flags & B_ASYNC) == 0 || 2837 nfs_asyncio(bp)) 2838 error = nfs_doio(bp, p); 2839 return (error); 2840 } 2841 2842 /* 2843 * fsync vnode op. Just call nfs_flush() with commit == 1. 2844 */ 2845 /* ARGSUSED */ 2846 int 2847 nfs_fsync(v) 2848 void *v; 2849 { 2850 struct vop_fsync_args /* { 2851 struct vnodeop_desc *a_desc; 2852 struct vnode * a_vp; 2853 struct ucred * a_cred; 2854 int a_flags; 2855 off_t offlo; 2856 off_t offhi; 2857 struct proc * a_p; 2858 } */ *ap = v; 2859 2860 return (nfs_flush(ap->a_vp, ap->a_cred, 2861 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2862 } 2863 2864 /* 2865 * Flush all the data associated with a vnode. 2866 */ 2867 int 2868 nfs_flush(vp, cred, waitfor, p, commit) 2869 struct vnode *vp; 2870 struct ucred *cred; 2871 int waitfor; 2872 struct proc *p; 2873 int commit; 2874 { 2875 struct uvm_object *uobj = &vp->v_uvm.u_obj; 2876 struct nfsnode *np = VTONFS(vp); 2877 int error; 2878 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2879 int rv; 2880 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2881 2882 error = 0; 2883 simple_lock(&uobj->vmobjlock); 2884 rv = (uobj->pgops->pgo_flush)(uobj, 0, 0, flushflags); 2885 simple_unlock(&uobj->vmobjlock); 2886 if (!rv) { 2887 error = EIO; 2888 } 2889 if (np->n_flag & NWRITEERR) { 2890 error = np->n_error; 2891 np->n_flag &= ~NWRITEERR; 2892 } 2893 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2894 return (error); 2895 } 2896 2897 /* 2898 * Return POSIX pathconf information applicable to nfs. 2899 * 2900 * N.B. The NFS V2 protocol doesn't support this RPC. 2901 */ 2902 /* ARGSUSED */ 2903 int 2904 nfs_pathconf(v) 2905 void *v; 2906 { 2907 struct vop_pathconf_args /* { 2908 struct vnode *a_vp; 2909 int a_name; 2910 register_t *a_retval; 2911 } */ *ap = v; 2912 struct nfsv3_pathconf *pcp; 2913 struct vnode *vp = ap->a_vp; 2914 struct nfsmount *nmp; 2915 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2916 int32_t t1, t2; 2917 u_int32_t *tl; 2918 caddr_t bpos, dpos, cp, cp2; 2919 int error = 0, attrflag; 2920 unsigned int l; 2921 u_int64_t maxsize; 2922 const int v3 = NFS_ISV3(vp); 2923 2924 switch (ap->a_name) { 2925 /* Names that can be resolved locally. */ 2926 case _PC_PIPE_BUF: 2927 *ap->a_retval = PIPE_BUF; 2928 break; 2929 case _PC_SYNC_IO: 2930 *ap->a_retval = 1; 2931 break; 2932 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2933 case _PC_LINK_MAX: 2934 case _PC_NAME_MAX: 2935 case _PC_CHOWN_RESTRICTED: 2936 case _PC_NO_TRUNC: 2937 if (!v3) { 2938 error = EINVAL; 2939 break; 2940 } 2941 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2942 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2943 nfsm_fhtom(vp, 1); 2944 nfsm_request(vp, NFSPROC_PATHCONF, 2945 curproc, curproc->p_ucred); /* XXX */ 2946 nfsm_postop_attr(vp, attrflag); 2947 if (!error) { 2948 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2949 NFSX_V3PATHCONF); 2950 switch (ap->a_name) { 2951 case _PC_LINK_MAX: 2952 *ap->a_retval = 2953 fxdr_unsigned(register_t, pcp->pc_linkmax); 2954 break; 2955 case _PC_NAME_MAX: 2956 *ap->a_retval = 2957 fxdr_unsigned(register_t, pcp->pc_namemax); 2958 break; 2959 case _PC_CHOWN_RESTRICTED: 2960 *ap->a_retval = 2961 (pcp->pc_chownrestricted == nfs_true); 2962 break; 2963 case _PC_NO_TRUNC: 2964 *ap->a_retval = 2965 (pcp->pc_notrunc == nfs_true); 2966 break; 2967 } 2968 } 2969 nfsm_reqdone; 2970 break; 2971 case _PC_FILESIZEBITS: 2972 if (v3) { 2973 nmp = VFSTONFS(vp->v_mount); 2974 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2975 if ((error = nfs_fsinfo(nmp, vp, 2976 curproc->p_ucred, curproc)) != 0) /* XXX */ 2977 break; 2978 for (l = 0, maxsize = nmp->nm_maxfilesize; 2979 (maxsize >> l) > 0; l++) 2980 ; 2981 *ap->a_retval = l + 1; 2982 } else { 2983 *ap->a_retval = 32; /* NFS V2 limitation */ 2984 } 2985 break; 2986 default: 2987 error = EINVAL; 2988 break; 2989 } 2990 2991 return (error); 2992 } 2993 2994 /* 2995 * NFS advisory byte-level locks. 2996 */ 2997 int 2998 nfs_advlock(v) 2999 void *v; 3000 { 3001 struct vop_advlock_args /* { 3002 struct vnode *a_vp; 3003 caddr_t a_id; 3004 int a_op; 3005 struct flock *a_fl; 3006 int a_flags; 3007 } */ *ap = v; 3008 struct nfsnode *np = VTONFS(ap->a_vp); 3009 3010 return lf_advlock(ap, &np->n_lockf, np->n_size); 3011 } 3012 3013 /* 3014 * Print out the contents of an nfsnode. 3015 */ 3016 int 3017 nfs_print(v) 3018 void *v; 3019 { 3020 struct vop_print_args /* { 3021 struct vnode *a_vp; 3022 } */ *ap = v; 3023 struct vnode *vp = ap->a_vp; 3024 struct nfsnode *np = VTONFS(vp); 3025 3026 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3027 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3028 if (vp->v_type == VFIFO) 3029 fifo_printinfo(vp); 3030 printf("\n"); 3031 return (0); 3032 } 3033 3034 /* 3035 * NFS file truncation. 3036 */ 3037 int 3038 nfs_truncate(v) 3039 void *v; 3040 { 3041 #if 0 3042 struct vop_truncate_args /* { 3043 struct vnode *a_vp; 3044 off_t a_length; 3045 int a_flags; 3046 struct ucred *a_cred; 3047 struct proc *a_p; 3048 } */ *ap = v; 3049 #endif 3050 3051 /* Use nfs_setattr */ 3052 return (EOPNOTSUPP); 3053 } 3054 3055 /* 3056 * NFS update. 3057 */ 3058 int 3059 nfs_update(v) 3060 void *v; 3061 #if 0 3062 struct vop_update_args /* { 3063 struct vnode *a_vp; 3064 struct timespec *a_ta; 3065 struct timespec *a_tm; 3066 int a_waitfor; 3067 } */ *ap = v; 3068 #endif 3069 { 3070 3071 /* Use nfs_setattr */ 3072 return (EOPNOTSUPP); 3073 } 3074 3075 /* 3076 * Just call bwrite(). 3077 */ 3078 int 3079 nfs_bwrite(v) 3080 void *v; 3081 { 3082 struct vop_bwrite_args /* { 3083 struct vnode *a_bp; 3084 } */ *ap = v; 3085 3086 return (bwrite(ap->a_bp)); 3087 } 3088 3089 /* 3090 * nfs special file access vnode op. 3091 * Essentially just get vattr and then imitate iaccess() since the device is 3092 * local to the client. 3093 */ 3094 int 3095 nfsspec_access(v) 3096 void *v; 3097 { 3098 struct vop_access_args /* { 3099 struct vnode *a_vp; 3100 int a_mode; 3101 struct ucred *a_cred; 3102 struct proc *a_p; 3103 } */ *ap = v; 3104 struct vattr va; 3105 struct vnode *vp = ap->a_vp; 3106 int error; 3107 3108 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3109 if (error) 3110 return (error); 3111 3112 /* 3113 * Disallow write attempts on filesystems mounted read-only; 3114 * unless the file is a socket, fifo, or a block or character 3115 * device resident on the filesystem. 3116 */ 3117 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3118 switch (vp->v_type) { 3119 case VREG: 3120 case VDIR: 3121 case VLNK: 3122 return (EROFS); 3123 default: 3124 break; 3125 } 3126 } 3127 3128 return (vaccess(va.va_type, va.va_mode, 3129 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3130 } 3131 3132 /* 3133 * Read wrapper for special devices. 3134 */ 3135 int 3136 nfsspec_read(v) 3137 void *v; 3138 { 3139 struct vop_read_args /* { 3140 struct vnode *a_vp; 3141 struct uio *a_uio; 3142 int a_ioflag; 3143 struct ucred *a_cred; 3144 } */ *ap = v; 3145 struct nfsnode *np = VTONFS(ap->a_vp); 3146 3147 /* 3148 * Set access flag. 3149 */ 3150 np->n_flag |= NACC; 3151 np->n_atim.tv_sec = time.tv_sec; 3152 np->n_atim.tv_nsec = time.tv_usec * 1000; 3153 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3154 } 3155 3156 /* 3157 * Write wrapper for special devices. 3158 */ 3159 int 3160 nfsspec_write(v) 3161 void *v; 3162 { 3163 struct vop_write_args /* { 3164 struct vnode *a_vp; 3165 struct uio *a_uio; 3166 int a_ioflag; 3167 struct ucred *a_cred; 3168 } */ *ap = v; 3169 struct nfsnode *np = VTONFS(ap->a_vp); 3170 3171 /* 3172 * Set update flag. 3173 */ 3174 np->n_flag |= NUPD; 3175 np->n_mtim.tv_sec = time.tv_sec; 3176 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3177 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3178 } 3179 3180 /* 3181 * Close wrapper for special devices. 3182 * 3183 * Update the times on the nfsnode then do device close. 3184 */ 3185 int 3186 nfsspec_close(v) 3187 void *v; 3188 { 3189 struct vop_close_args /* { 3190 struct vnode *a_vp; 3191 int a_fflag; 3192 struct ucred *a_cred; 3193 struct proc *a_p; 3194 } */ *ap = v; 3195 struct vnode *vp = ap->a_vp; 3196 struct nfsnode *np = VTONFS(vp); 3197 struct vattr vattr; 3198 3199 if (np->n_flag & (NACC | NUPD)) { 3200 np->n_flag |= NCHG; 3201 if (vp->v_usecount == 1 && 3202 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3203 VATTR_NULL(&vattr); 3204 if (np->n_flag & NACC) 3205 vattr.va_atime = np->n_atim; 3206 if (np->n_flag & NUPD) 3207 vattr.va_mtime = np->n_mtim; 3208 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3209 } 3210 } 3211 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3212 } 3213 3214 /* 3215 * Read wrapper for fifos. 3216 */ 3217 int 3218 nfsfifo_read(v) 3219 void *v; 3220 { 3221 struct vop_read_args /* { 3222 struct vnode *a_vp; 3223 struct uio *a_uio; 3224 int a_ioflag; 3225 struct ucred *a_cred; 3226 } */ *ap = v; 3227 struct nfsnode *np = VTONFS(ap->a_vp); 3228 3229 /* 3230 * Set access flag. 3231 */ 3232 np->n_flag |= NACC; 3233 np->n_atim.tv_sec = time.tv_sec; 3234 np->n_atim.tv_nsec = time.tv_usec * 1000; 3235 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3236 } 3237 3238 /* 3239 * Write wrapper for fifos. 3240 */ 3241 int 3242 nfsfifo_write(v) 3243 void *v; 3244 { 3245 struct vop_write_args /* { 3246 struct vnode *a_vp; 3247 struct uio *a_uio; 3248 int a_ioflag; 3249 struct ucred *a_cred; 3250 } */ *ap = v; 3251 struct nfsnode *np = VTONFS(ap->a_vp); 3252 3253 /* 3254 * Set update flag. 3255 */ 3256 np->n_flag |= NUPD; 3257 np->n_mtim.tv_sec = time.tv_sec; 3258 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3259 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3260 } 3261 3262 /* 3263 * Close wrapper for fifos. 3264 * 3265 * Update the times on the nfsnode then do fifo close. 3266 */ 3267 int 3268 nfsfifo_close(v) 3269 void *v; 3270 { 3271 struct vop_close_args /* { 3272 struct vnode *a_vp; 3273 int a_fflag; 3274 struct ucred *a_cred; 3275 struct proc *a_p; 3276 } */ *ap = v; 3277 struct vnode *vp = ap->a_vp; 3278 struct nfsnode *np = VTONFS(vp); 3279 struct vattr vattr; 3280 3281 if (np->n_flag & (NACC | NUPD)) { 3282 if (np->n_flag & NACC) { 3283 np->n_atim.tv_sec = time.tv_sec; 3284 np->n_atim.tv_nsec = time.tv_usec * 1000; 3285 } 3286 if (np->n_flag & NUPD) { 3287 np->n_mtim.tv_sec = time.tv_sec; 3288 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3289 } 3290 np->n_flag |= NCHG; 3291 if (vp->v_usecount == 1 && 3292 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3293 VATTR_NULL(&vattr); 3294 if (np->n_flag & NACC) 3295 vattr.va_atime = np->n_atim; 3296 if (np->n_flag & NUPD) 3297 vattr.va_mtime = np->n_mtim; 3298 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3299 } 3300 } 3301 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3302 } 3303
Indexes created Tue Sep 23 02:09:52 GMT 2025