nfs_vnops.c revision 36541
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 37 * $Id: nfs_vnops.c,v 1.102 1998/05/31 19:29:28 peter Exp $ 38 */ 39 40 41/* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45#include "opt_inet.h" 46 47#include <sys/param.h> 48#include <sys/kernel.h> 49#include <sys/systm.h> 50#include <sys/resourcevar.h> 51#include <sys/proc.h> 52#include <sys/mount.h> 53#include <sys/buf.h> 54#include <sys/malloc.h> 55#include <sys/mbuf.h> 56#include <sys/namei.h> 57#include <sys/socket.h> 58#include <sys/vnode.h> 59#include <sys/dirent.h> 60#include <sys/fcntl.h> 61#include <sys/lockf.h> 62#include <sys/stat.h> 63 64#include <vm/vm.h> 65#include <vm/vm_extern.h> 66#include <vm/vm_zone.h> 67 68#include <miscfs/fifofs/fifo.h> 69#include <miscfs/specfs/specdev.h> 70 71#include <nfs/rpcv2.h> 72#include <nfs/nfsproto.h> 73#include <nfs/nfs.h> 74#include <nfs/nfsnode.h> 75#include <nfs/nfsmount.h> 76#include <nfs/xdr_subs.h> 77#include <nfs/nfsm_subs.h> 78#include <nfs/nqnfs.h> 79 80#include <net/if.h> 81#include <netinet/in.h> 82#include <netinet/in_var.h> 83 84/* Defs */ 85#define TRUE 1 86#define FALSE 0 87 88/* 89 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these 90 * calls are not in getblk() and brelse() so that they would not be necessary 91 * here. 92 */ 93#ifndef B_VMIO 94#define vfs_busy_pages(bp, f) 95#endif 96 97static int nfsspec_read __P((struct vop_read_args *)); 98static int nfsspec_write __P((struct vop_write_args *)); 99static int nfsfifo_read __P((struct vop_read_args *)); 100static int nfsfifo_write __P((struct vop_write_args *)); 101static int nfsspec_close __P((struct vop_close_args *)); 102static int nfsfifo_close __P((struct vop_close_args *)); 103#define nfs_poll vop_nopoll 104static int nfs_flush __P((struct vnode *,struct ucred *,int,struct proc *,int)); 105static int nfs_setattrrpc __P((struct vnode *,struct vattr *,struct ucred *,struct proc *)); 106static int nfs_lookup __P((struct vop_lookup_args *)); 107static int nfs_create __P((struct vop_create_args *)); 108static int nfs_mknod __P((struct vop_mknod_args *)); 109static int nfs_open __P((struct vop_open_args *)); 110static int nfs_close __P((struct vop_close_args *)); 111static int nfs_access __P((struct vop_access_args *)); 112static int nfs_getattr __P((struct vop_getattr_args *)); 113static int nfs_setattr __P((struct vop_setattr_args *)); 114static int nfs_read __P((struct vop_read_args *)); 115static int nfs_mmap __P((struct vop_mmap_args *)); 116static int nfs_fsync __P((struct vop_fsync_args *)); 117static int nfs_remove __P((struct vop_remove_args *)); 118static int nfs_link __P((struct vop_link_args *)); 119static int nfs_rename __P((struct vop_rename_args *)); 120static int nfs_mkdir __P((struct vop_mkdir_args *)); 121static int nfs_rmdir __P((struct vop_rmdir_args *)); 122static int nfs_symlink __P((struct vop_symlink_args *)); 123static int nfs_readdir __P((struct vop_readdir_args *)); 124static int nfs_bmap __P((struct vop_bmap_args *)); 125static int nfs_strategy __P((struct vop_strategy_args *)); 126static int nfs_lookitup __P((struct vnode *, const char *, int, 127 struct ucred *, struct proc *, struct nfsnode **)); 128static int nfs_sillyrename __P((struct vnode *,struct vnode *,struct componentname *)); 129static int nfsspec_access __P((struct vop_access_args *)); 130static int nfs_readlink __P((struct vop_readlink_args *)); 131static int nfs_print __P((struct vop_print_args *)); 132static int nfs_advlock __P((struct vop_advlock_args *)); 133static int nfs_bwrite __P((struct vop_bwrite_args *)); 134/* 135 * Global vfs data structures for nfs 136 */ 137vop_t **nfsv2_vnodeop_p; 138static struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 139 { &vop_default_desc, (vop_t *) vop_defaultop }, 140 { &vop_abortop_desc, (vop_t *) nfs_abortop }, 141 { &vop_access_desc, (vop_t *) nfs_access }, 142 { &vop_advlock_desc, (vop_t *) nfs_advlock }, 143 { &vop_bmap_desc, (vop_t *) nfs_bmap }, 144 { &vop_bwrite_desc, (vop_t *) nfs_bwrite }, 145 { &vop_close_desc, (vop_t *) nfs_close }, 146 { &vop_create_desc, (vop_t *) nfs_create }, 147 { &vop_fsync_desc, (vop_t *) nfs_fsync }, 148 { &vop_getattr_desc, (vop_t *) nfs_getattr }, 149 { &vop_getpages_desc, (vop_t *) nfs_getpages }, 150 { &vop_putpages_desc, (vop_t *) nfs_putpages }, 151 { &vop_inactive_desc, (vop_t *) nfs_inactive }, 152 { &vop_lease_desc, (vop_t *) vop_null }, 153 { &vop_link_desc, (vop_t *) nfs_link }, 154 { &vop_lock_desc, (vop_t *) vop_sharedlock }, 155 { &vop_lookup_desc, (vop_t *) nfs_lookup }, 156 { &vop_mkdir_desc, (vop_t *) nfs_mkdir }, 157 { &vop_mknod_desc, (vop_t *) nfs_mknod }, 158 { &vop_mmap_desc, (vop_t *) nfs_mmap }, 159 { &vop_open_desc, (vop_t *) nfs_open }, 160 { &vop_poll_desc, (vop_t *) nfs_poll }, 161 { &vop_print_desc, (vop_t *) nfs_print }, 162 { &vop_read_desc, (vop_t *) nfs_read }, 163 { &vop_readdir_desc, (vop_t *) nfs_readdir }, 164 { &vop_readlink_desc, (vop_t *) nfs_readlink }, 165 { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, 166 { &vop_remove_desc, (vop_t *) nfs_remove }, 167 { &vop_rename_desc, (vop_t *) nfs_rename }, 168 { &vop_rmdir_desc, (vop_t *) nfs_rmdir }, 169 { &vop_setattr_desc, (vop_t *) nfs_setattr }, 170 { &vop_strategy_desc, (vop_t *) nfs_strategy }, 171 { &vop_symlink_desc, (vop_t *) nfs_symlink }, 172 { &vop_write_desc, (vop_t *) nfs_write }, 173 { NULL, NULL } 174}; 175static struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 176 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 177VNODEOP_SET(nfsv2_vnodeop_opv_desc); 178 179/* 180 * Special device vnode ops 181 */ 182vop_t **spec_nfsv2nodeop_p; 183static struct vnodeopv_entry_desc nfsv2_specop_entries[] = { 184 { &vop_default_desc, (vop_t *) spec_vnoperate }, 185 { &vop_access_desc, (vop_t *) nfsspec_access }, 186 { &vop_close_desc, (vop_t *) nfsspec_close }, 187 { &vop_fsync_desc, (vop_t *) nfs_fsync }, 188 { &vop_getattr_desc, (vop_t *) nfs_getattr }, 189 { &vop_inactive_desc, (vop_t *) nfs_inactive }, 190 { &vop_lock_desc, (vop_t *) vop_sharedlock }, 191 { &vop_print_desc, (vop_t *) nfs_print }, 192 { &vop_read_desc, (vop_t *) nfsspec_read }, 193 { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, 194 { &vop_setattr_desc, (vop_t *) nfs_setattr }, 195 { &vop_write_desc, (vop_t *) nfsspec_write }, 196 { NULL, NULL } 197}; 198static struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 199 { &spec_nfsv2nodeop_p, nfsv2_specop_entries }; 200VNODEOP_SET(spec_nfsv2nodeop_opv_desc); 201 202vop_t **fifo_nfsv2nodeop_p; 203static struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = { 204 { &vop_default_desc, (vop_t *) fifo_vnoperate }, 205 { &vop_access_desc, (vop_t *) nfsspec_access }, 206 { &vop_close_desc, (vop_t *) nfsfifo_close }, 207 { &vop_fsync_desc, (vop_t *) nfs_fsync }, 208 { &vop_getattr_desc, (vop_t *) nfs_getattr }, 209 { &vop_inactive_desc, (vop_t *) nfs_inactive }, 210 { &vop_lock_desc, (vop_t *) vop_sharedlock }, 211 { &vop_print_desc, (vop_t *) nfs_print }, 212 { &vop_read_desc, (vop_t *) nfsfifo_read }, 213 { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, 214 { &vop_setattr_desc, (vop_t *) nfs_setattr }, 215 { &vop_write_desc, (vop_t *) nfsfifo_write }, 216 { NULL, NULL } 217}; 218static struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 219 { &fifo_nfsv2nodeop_p, nfsv2_fifoop_entries }; 220VNODEOP_SET(fifo_nfsv2nodeop_opv_desc); 221 222static int nfs_commit __P((struct vnode *vp, u_quad_t offset, int cnt, 223 struct ucred *cred, struct proc *procp)); 224static int nfs_mknodrpc __P((struct vnode *dvp, struct vnode **vpp, 225 struct componentname *cnp, 226 struct vattr *vap)); 227static int nfs_removerpc __P((struct vnode *dvp, const char *name, 228 int namelen, 229 struct ucred *cred, struct proc *proc)); 230static int nfs_renamerpc __P((struct vnode *fdvp, const char *fnameptr, 231 int fnamelen, struct vnode *tdvp, 232 const char *tnameptr, int tnamelen, 233 struct ucred *cred, struct proc *proc)); 234static int nfs_renameit __P((struct vnode *sdvp, 235 struct componentname *scnp, 236 struct sillyrename *sp)); 237 238/* 239 * Global variables 240 */ 241extern u_int32_t nfs_true, nfs_false; 242extern u_int32_t nfs_xdrneg1; 243extern struct nfsstats nfsstats; 244extern nfstype nfsv3_type[9]; 245struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 246struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 247int nfs_numasync = 0; 248#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 249 250/* 251 * nfs access vnode op. 252 * For nfs version 2, just return ok. File accesses may fail later. 253 * For nfs version 3, use the access rpc to check accessibility. If file modes 254 * are changed on the server, accesses might still fail later. 255 */ 256static int 257nfs_access(ap) 258 struct vop_access_args /* { 259 struct vnode *a_vp; 260 int a_mode; 261 struct ucred *a_cred; 262 struct proc *a_p; 263 } */ *ap; 264{ 265 register struct vnode *vp = ap->a_vp; 266 register u_int32_t *tl; 267 register caddr_t cp; 268 register int32_t t1, t2; 269 caddr_t bpos, dpos, cp2; 270 int error = 0, attrflag; 271 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 272 u_int32_t mode, rmode; 273 int v3 = NFS_ISV3(vp); 274 275 /* 276 * Disallow write attempts on filesystems mounted read-only; 277 * unless the file is a socket, fifo, or a block or character 278 * device resident on the filesystem. 279 */ 280 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 281 switch (vp->v_type) { 282 case VREG: 283 case VDIR: 284 case VLNK: 285 return (EROFS); 286 default: 287 break; 288 } 289 } 290 /* 291 * For nfs v3, do an access rpc, otherwise you are stuck emulating 292 * ufs_access() locally using the vattr. This may not be correct, 293 * since the server may apply other access criteria such as 294 * client uid-->server uid mapping that we do not know about, but 295 * this is better than just returning anything that is lying about 296 * in the cache. 297 */ 298 if (v3) { 299 nfsstats.rpccnt[NFSPROC_ACCESS]++; 300 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 301 nfsm_fhtom(vp, v3); 302 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 303 if (ap->a_mode & VREAD) 304 mode = NFSV3ACCESS_READ; 305 else 306 mode = 0; 307 if (vp->v_type != VDIR) { 308 if (ap->a_mode & VWRITE) 309 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 310 if (ap->a_mode & VEXEC) 311 mode |= NFSV3ACCESS_EXECUTE; 312 } else { 313 if (ap->a_mode & VWRITE) 314 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 315 NFSV3ACCESS_DELETE); 316 if (ap->a_mode & VEXEC) 317 mode |= NFSV3ACCESS_LOOKUP; 318 } 319 *tl = txdr_unsigned(mode); 320 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 321 nfsm_postop_attr(vp, attrflag); 322 if (!error) { 323 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 324 rmode = fxdr_unsigned(u_int32_t, *tl); 325 /* 326 * The NFS V3 spec does not clarify whether or not 327 * the returned access bits can be a superset of 328 * the ones requested, so... 329 */ 330 if ((rmode & mode) != mode) 331 error = EACCES; 332 } 333 nfsm_reqdone; 334 return (error); 335 } else { 336 if (error = nfsspec_access(ap)) 337 return (error); 338 339 /* 340 * Attempt to prevent a mapped root from accessing a file 341 * which it shouldn't. We try to read a byte from the file 342 * if the user is root and the file is not zero length. 343 * After calling nfsspec_access, we should have the correct 344 * file size cached. 345 */ 346 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD) 347 && VTONFS(vp)->n_size > 0) { 348 struct iovec aiov; 349 struct uio auio; 350 char buf[1]; 351 352 aiov.iov_base = buf; 353 aiov.iov_len = 1; 354 auio.uio_iov = &aiov; 355 auio.uio_iovcnt = 1; 356 auio.uio_offset = 0; 357 auio.uio_resid = 1; 358 auio.uio_segflg = UIO_SYSSPACE; 359 auio.uio_rw = UIO_READ; 360 auio.uio_procp = ap->a_p; 361 362 if (vp->v_type == VREG) 363 error = nfs_readrpc(vp, &auio, ap->a_cred); 364 else if (vp->v_type == VDIR) { 365 char* bp; 366 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); 367 aiov.iov_base = bp; 368 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; 369 error = nfs_readdirrpc(vp, &auio, ap->a_cred); 370 free(bp, M_TEMP); 371 } else if (vp->v_type = VLNK) 372 error = nfs_readlinkrpc(vp, &auio, ap->a_cred); 373 else 374 error = EACCES; 375 } 376 return (error); 377 } 378} 379 380/* 381 * nfs open vnode op 382 * Check to see if the type is ok 383 * and that deletion is not in progress. 384 * For paged in text files, you will need to flush the page cache 385 * if consistency is lost. 386 */ 387/* ARGSUSED */ 388static int 389nfs_open(ap) 390 struct vop_open_args /* { 391 struct vnode *a_vp; 392 int a_mode; 393 struct ucred *a_cred; 394 struct proc *a_p; 395 } */ *ap; 396{ 397 register struct vnode *vp = ap->a_vp; 398 struct nfsnode *np = VTONFS(vp); 399 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 400 struct vattr vattr; 401 int error; 402 403 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 404#ifdef DIAGNOSTIC 405 printf("open eacces vtyp=%d\n",vp->v_type); 406#endif 407 return (EACCES); 408 } 409 /* 410 * Get a valid lease. If cached data is stale, flush it. 411 */ 412 if (nmp->nm_flag & NFSMNT_NQNFS) { 413 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 414 do { 415 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 416 ap->a_p); 417 } while (error == NQNFS_EXPIRED); 418 if (error) 419 return (error); 420 if (np->n_lrev != np->n_brev || 421 (np->n_flag & NQNFSNONCACHE)) { 422 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 423 ap->a_p, 1)) == EINTR) 424 return (error); 425 np->n_brev = np->n_lrev; 426 } 427 } 428 } else { 429 if (np->n_flag & NMODIFIED) { 430 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 431 ap->a_p, 1)) == EINTR) 432 return (error); 433 np->n_attrstamp = 0; 434 if (vp->v_type == VDIR) 435 np->n_direofoffset = 0; 436 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 437 if (error) 438 return (error); 439 np->n_mtime = vattr.va_mtime.tv_sec; 440 } else { 441 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 442 if (error) 443 return (error); 444 if (np->n_mtime != vattr.va_mtime.tv_sec) { 445 if (vp->v_type == VDIR) 446 np->n_direofoffset = 0; 447 if ((error = nfs_vinvalbuf(vp, V_SAVE, 448 ap->a_cred, ap->a_p, 1)) == EINTR) 449 return (error); 450 np->n_mtime = vattr.va_mtime.tv_sec; 451 } 452 } 453 } 454 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 455 np->n_attrstamp = 0; /* For Open/Close consistency */ 456 return (0); 457} 458 459/* 460 * nfs close vnode op 461 * What an NFS client should do upon close after writing is a debatable issue. 462 * Most NFS clients push delayed writes to the server upon close, basically for 463 * two reasons: 464 * 1 - So that any write errors may be reported back to the client process 465 * doing the close system call. By far the two most likely errors are 466 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 467 * 2 - To put a worst case upper bound on cache inconsistency between 468 * multiple clients for the file. 469 * There is also a consistency problem for Version 2 of the protocol w.r.t. 470 * not being able to tell if other clients are writing a file concurrently, 471 * since there is no way of knowing if the changed modify time in the reply 472 * is only due to the write for this client. 473 * (NFS Version 3 provides weak cache consistency data in the reply that 474 * should be sufficient to detect and handle this case.) 475 * 476 * The current code does the following: 477 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 478 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 479 * or commit them (this satisfies 1 and 2 except for the 480 * case where the server crashes after this close but 481 * before the commit RPC, which is felt to be "good 482 * enough". Changing the last argument to nfs_flush() to 483 * a 1 would force a commit operation, if it is felt a 484 * commit is necessary now. 485 * for NQNFS - do nothing now, since 2 is dealt with via leases and 486 * 1 should be dealt with via an fsync() system call for 487 * cases where write errors are important. 488 */ 489/* ARGSUSED */ 490static int 491nfs_close(ap) 492 struct vop_close_args /* { 493 struct vnodeop_desc *a_desc; 494 struct vnode *a_vp; 495 int a_fflag; 496 struct ucred *a_cred; 497 struct proc *a_p; 498 } */ *ap; 499{ 500 register struct vnode *vp = ap->a_vp; 501 register struct nfsnode *np = VTONFS(vp); 502 int error = 0; 503 504 if (vp->v_type == VREG) { 505 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 506 (np->n_flag & NMODIFIED)) { 507 if (NFS_ISV3(vp)) { 508 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 509 np->n_flag &= ~NMODIFIED; 510 } else 511 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 512 np->n_attrstamp = 0; 513 } 514 if (np->n_flag & NWRITEERR) { 515 np->n_flag &= ~NWRITEERR; 516 error = np->n_error; 517 } 518 } 519 return (error); 520} 521 522/* 523 * nfs getattr call from vfs. 524 */ 525static int 526nfs_getattr(ap) 527 struct vop_getattr_args /* { 528 struct vnode *a_vp; 529 struct vattr *a_vap; 530 struct ucred *a_cred; 531 struct proc *a_p; 532 } */ *ap; 533{ 534 register struct vnode *vp = ap->a_vp; 535 register struct nfsnode *np = VTONFS(vp); 536 register caddr_t cp; 537 register u_int32_t *tl; 538 register int32_t t1, t2; 539 caddr_t bpos, dpos; 540 int error = 0; 541 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 542 int v3 = NFS_ISV3(vp); 543 544 /* 545 * Update local times for special files. 546 */ 547 if (np->n_flag & (NACC | NUPD)) 548 np->n_flag |= NCHG; 549 /* 550 * First look in the cache. 551 */ 552 if (nfs_getattrcache(vp, ap->a_vap) == 0) 553 return (0); 554 nfsstats.rpccnt[NFSPROC_GETATTR]++; 555 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 556 nfsm_fhtom(vp, v3); 557 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 558 if (!error) { 559 nfsm_loadattr(vp, ap->a_vap); 560 } 561 nfsm_reqdone; 562 return (error); 563} 564 565/* 566 * nfs setattr call. 567 */ 568static int 569nfs_setattr(ap) 570 struct vop_setattr_args /* { 571 struct vnodeop_desc *a_desc; 572 struct vnode *a_vp; 573 struct vattr *a_vap; 574 struct ucred *a_cred; 575 struct proc *a_p; 576 } */ *ap; 577{ 578 register struct vnode *vp = ap->a_vp; 579 register struct nfsnode *np = VTONFS(vp); 580 register struct vattr *vap = ap->a_vap; 581 int error = 0; 582 u_quad_t tsize; 583 584#ifndef nolint 585 tsize = (u_quad_t)0; 586#endif 587 588 /* 589 * Setting of flags is not supported. 590 */ 591 if (vap->va_flags != VNOVAL) 592 return (EOPNOTSUPP); 593 594 /* 595 * Disallow write attempts if the filesystem is mounted read-only. 596 */ 597 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 598 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 599 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 600 (vp->v_mount->mnt_flag & MNT_RDONLY)) 601 return (EROFS); 602 if (vap->va_size != VNOVAL) { 603 switch (vp->v_type) { 604 case VDIR: 605 return (EISDIR); 606 case VCHR: 607 case VBLK: 608 case VSOCK: 609 case VFIFO: 610 if (vap->va_mtime.tv_sec == VNOVAL && 611 vap->va_atime.tv_sec == VNOVAL && 612 vap->va_mode == (mode_t)VNOVAL && 613 vap->va_uid == (uid_t)VNOVAL && 614 vap->va_gid == (gid_t)VNOVAL) 615 return (0); 616 vap->va_size = VNOVAL; 617 break; 618 default: 619 /* 620 * Disallow write attempts if the filesystem is 621 * mounted read-only. 622 */ 623 if (vp->v_mount->mnt_flag & MNT_RDONLY) 624 return (EROFS); 625 if (np->n_flag & NMODIFIED) { 626 if (vap->va_size == 0) 627 error = nfs_vinvalbuf(vp, 0, 628 ap->a_cred, ap->a_p, 1); 629 else 630 error = nfs_vinvalbuf(vp, V_SAVE, 631 ap->a_cred, ap->a_p, 1); 632 if (error) 633 return (error); 634 } 635 tsize = np->n_size; 636 np->n_size = np->n_vattr.va_size = vap->va_size; 637 vnode_pager_setsize(vp, (u_long)np->n_size); 638 }; 639 } else if ((vap->va_mtime.tv_sec != VNOVAL || 640 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) && 641 vp->v_type == VREG && 642 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 643 ap->a_p, 1)) == EINTR) 644 return (error); 645 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 646 if (error && vap->va_size != VNOVAL) { 647 np->n_size = np->n_vattr.va_size = tsize; 648 vnode_pager_setsize(vp, (u_long)np->n_size); 649 } 650 return (error); 651} 652 653/* 654 * Do an nfs setattr rpc. 655 */ 656static int 657nfs_setattrrpc(vp, vap, cred, procp) 658 register struct vnode *vp; 659 register struct vattr *vap; 660 struct ucred *cred; 661 struct proc *procp; 662{ 663 register struct nfsv2_sattr *sp; 664 register caddr_t cp; 665 register int32_t t1, t2; 666 caddr_t bpos, dpos, cp2; 667 u_int32_t *tl; 668 int error = 0, wccflag = NFSV3_WCCRATTR; 669 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 670 int v3 = NFS_ISV3(vp); 671 672 nfsstats.rpccnt[NFSPROC_SETATTR]++; 673 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 674 nfsm_fhtom(vp, v3); 675 if (v3) { 676 if (vap->va_mode != (mode_t)VNOVAL) { 677 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 678 *tl++ = nfs_true; 679 *tl = txdr_unsigned(vap->va_mode); 680 } else { 681 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 682 *tl = nfs_false; 683 } 684 if (vap->va_uid != (uid_t)VNOVAL) { 685 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 686 *tl++ = nfs_true; 687 *tl = txdr_unsigned(vap->va_uid); 688 } else { 689 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 690 *tl = nfs_false; 691 } 692 if (vap->va_gid != (gid_t)VNOVAL) { 693 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 694 *tl++ = nfs_true; 695 *tl = txdr_unsigned(vap->va_gid); 696 } else { 697 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 698 *tl = nfs_false; 699 } 700 if (vap->va_size != VNOVAL) { 701 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 702 *tl++ = nfs_true; 703 txdr_hyper(&vap->va_size, tl); 704 } else { 705 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 706 *tl = nfs_false; 707 } 708 if (vap->va_atime.tv_sec != VNOVAL) { 709 if (vap->va_atime.tv_sec != time_second) { 710 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 711 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 712 txdr_nfsv3time(&vap->va_atime, tl); 713 } else { 714 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 715 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 716 } 717 } else { 718 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 719 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 720 } 721 if (vap->va_mtime.tv_sec != VNOVAL) { 722 if (vap->va_mtime.tv_sec != time_second) { 723 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 724 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 725 txdr_nfsv3time(&vap->va_mtime, tl); 726 } else { 727 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 728 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 729 } 730 } else { 731 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 732 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 733 } 734 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 735 *tl = nfs_false; 736 } else { 737 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 738 if (vap->va_mode == (mode_t)VNOVAL) 739 sp->sa_mode = nfs_xdrneg1; 740 else 741 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 742 if (vap->va_uid == (uid_t)VNOVAL) 743 sp->sa_uid = nfs_xdrneg1; 744 else 745 sp->sa_uid = txdr_unsigned(vap->va_uid); 746 if (vap->va_gid == (gid_t)VNOVAL) 747 sp->sa_gid = nfs_xdrneg1; 748 else 749 sp->sa_gid = txdr_unsigned(vap->va_gid); 750 sp->sa_size = txdr_unsigned(vap->va_size); 751 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 752 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 753 } 754 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 755 if (v3) { 756 nfsm_wcc_data(vp, wccflag); 757 } else 758 nfsm_loadattr(vp, (struct vattr *)0); 759 nfsm_reqdone; 760 return (error); 761} 762 763/* 764 * nfs lookup call, one step at a time... 765 * First look in cache 766 * If not found, unlock the directory nfsnode and do the rpc 767 */ 768static int 769nfs_lookup(ap) 770 struct vop_lookup_args /* { 771 struct vnodeop_desc *a_desc; 772 struct vnode *a_dvp; 773 struct vnode **a_vpp; 774 struct componentname *a_cnp; 775 } */ *ap; 776{ 777 struct componentname *cnp = ap->a_cnp; 778 struct vnode *dvp = ap->a_dvp; 779 struct vnode **vpp = ap->a_vpp; 780 int flags = cnp->cn_flags; 781 struct vnode *newvp; 782 u_int32_t *tl; 783 caddr_t cp; 784 int32_t t1, t2; 785 struct nfsmount *nmp; 786 caddr_t bpos, dpos, cp2; 787 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 788 long len; 789 nfsfh_t *fhp; 790 struct nfsnode *np; 791 int lockparent, wantparent, error = 0, attrflag, fhsize; 792 int v3 = NFS_ISV3(dvp); 793 struct proc *p = cnp->cn_proc; 794 795 *vpp = NULLVP; 796 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 797 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 798 return (EROFS); 799 if (dvp->v_type != VDIR) 800 return (ENOTDIR); 801 lockparent = flags & LOCKPARENT; 802 wantparent = flags & (LOCKPARENT|WANTPARENT); 803 nmp = VFSTONFS(dvp->v_mount); 804 np = VTONFS(dvp); 805 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { 806 struct vattr vattr; 807 int vpid; 808 809 if (error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, p)) { 810 *vpp = NULLVP; 811 return (error); 812 } 813 814 newvp = *vpp; 815 vpid = newvp->v_id; 816 /* 817 * See the comment starting `Step through' in ufs/ufs_lookup.c 818 * for an explanation of the locking protocol 819 */ 820 if (dvp == newvp) { 821 VREF(newvp); 822 error = 0; 823 } else if (flags & ISDOTDOT) { 824 VOP_UNLOCK(dvp, 0, p); 825 error = vget(newvp, LK_EXCLUSIVE, p); 826 if (!error && lockparent && (flags & ISLASTCN)) 827 error = vn_lock(dvp, LK_EXCLUSIVE, p); 828 } else { 829 error = vget(newvp, LK_EXCLUSIVE, p); 830 if (!lockparent || error || !(flags & ISLASTCN)) 831 VOP_UNLOCK(dvp, 0, p); 832 } 833 if (!error) { 834 if (vpid == newvp->v_id) { 835 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, p) 836 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 837 nfsstats.lookupcache_hits++; 838 if (cnp->cn_nameiop != LOOKUP && 839 (flags & ISLASTCN)) 840 cnp->cn_flags |= SAVENAME; 841 return (0); 842 } 843 cache_purge(newvp); 844 } 845 vput(newvp); 846 if (lockparent && dvp != newvp && (flags & ISLASTCN)) 847 VOP_UNLOCK(dvp, 0, p); 848 } 849 error = vn_lock(dvp, LK_EXCLUSIVE, p); 850 *vpp = NULLVP; 851 if (error) 852 return (error); 853 } 854 error = 0; 855 newvp = NULLVP; 856 nfsstats.lookupcache_misses++; 857 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 858 len = cnp->cn_namelen; 859 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 860 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 861 nfsm_fhtom(dvp, v3); 862 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 863 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 864 if (error) { 865 nfsm_postop_attr(dvp, attrflag); 866 m_freem(mrep); 867 goto nfsmout; 868 } 869 nfsm_getfh(fhp, fhsize, v3); 870 871 /* 872 * Handle RENAME case... 873 */ 874 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 875 if (NFS_CMPFH(np, fhp, fhsize)) { 876 m_freem(mrep); 877 return (EISDIR); 878 } 879 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 880 if (error) { 881 m_freem(mrep); 882 return (error); 883 } 884 newvp = NFSTOV(np); 885 if (v3) { 886 nfsm_postop_attr(newvp, attrflag); 887 nfsm_postop_attr(dvp, attrflag); 888 } else 889 nfsm_loadattr(newvp, (struct vattr *)0); 890 *vpp = newvp; 891 m_freem(mrep); 892 cnp->cn_flags |= SAVENAME; 893 if (!lockparent) 894 VOP_UNLOCK(dvp, 0, p); 895 return (0); 896 } 897 898 if (flags & ISDOTDOT) { 899 VOP_UNLOCK(dvp, 0, p); 900 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 901 if (error) { 902 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p); 903 return (error); 904 } 905 newvp = NFSTOV(np); 906 if (lockparent && (flags & ISLASTCN) && 907 (error = vn_lock(dvp, LK_EXCLUSIVE, p))) { 908 vput(newvp); 909 return (error); 910 } 911 } else if (NFS_CMPFH(np, fhp, fhsize)) { 912 VREF(dvp); 913 newvp = dvp; 914 } else { 915 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 916 if (error) { 917 m_freem(mrep); 918 return (error); 919 } 920 if (!lockparent || !(flags & ISLASTCN)) 921 VOP_UNLOCK(dvp, 0, p); 922 newvp = NFSTOV(np); 923 } 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 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 930 cnp->cn_flags |= SAVENAME; 931 if ((cnp->cn_flags & MAKEENTRY) && 932 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 933 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 934 cache_enter(dvp, newvp, cnp); 935 } 936 *vpp = newvp; 937 nfsm_reqdone; 938 if (error) { 939 if (newvp != NULLVP) { 940 vrele(newvp); 941 *vpp = NULLVP; 942 } 943 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 944 (flags & ISLASTCN) && error == ENOENT) { 945 if (!lockparent) 946 VOP_UNLOCK(dvp, 0, p); 947 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 948 error = EROFS; 949 else 950 error = EJUSTRETURN; 951 } 952 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 953 cnp->cn_flags |= SAVENAME; 954 } 955 return (error); 956} 957 958/* 959 * nfs read call. 960 * Just call nfs_bioread() to do the work. 961 */ 962static int 963nfs_read(ap) 964 struct vop_read_args /* { 965 struct vnode *a_vp; 966 struct uio *a_uio; 967 int a_ioflag; 968 struct ucred *a_cred; 969 } */ *ap; 970{ 971 register struct vnode *vp = ap->a_vp; 972 973 if (vp->v_type != VREG) 974 return (EPERM); 975 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 976} 977 978/* 979 * nfs readlink call 980 */ 981static int 982nfs_readlink(ap) 983 struct vop_readlink_args /* { 984 struct vnode *a_vp; 985 struct uio *a_uio; 986 struct ucred *a_cred; 987 } */ *ap; 988{ 989 register struct vnode *vp = ap->a_vp; 990 991 if (vp->v_type != VLNK) 992 return (EPERM); 993 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 994} 995 996/* 997 * Do a readlink rpc. 998 * Called by nfs_doio() from below the buffer cache. 999 */ 1000int 1001nfs_readlinkrpc(vp, uiop, cred) 1002 register struct vnode *vp; 1003 struct uio *uiop; 1004 struct ucred *cred; 1005{ 1006 register u_int32_t *tl; 1007 register caddr_t cp; 1008 register int32_t t1, t2; 1009 caddr_t bpos, dpos, cp2; 1010 int error = 0, len, attrflag; 1011 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1012 int v3 = NFS_ISV3(vp); 1013 1014 nfsstats.rpccnt[NFSPROC_READLINK]++; 1015 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1016 nfsm_fhtom(vp, v3); 1017 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1018 if (v3) 1019 nfsm_postop_attr(vp, attrflag); 1020 if (!error) { 1021 nfsm_strsiz(len, NFS_MAXPATHLEN); 1022 nfsm_mtouio(uiop, len); 1023 } 1024 nfsm_reqdone; 1025 return (error); 1026} 1027 1028/* 1029 * nfs read rpc call 1030 * Ditto above 1031 */ 1032int 1033nfs_readrpc(vp, uiop, cred) 1034 register struct vnode *vp; 1035 struct uio *uiop; 1036 struct ucred *cred; 1037{ 1038 register u_int32_t *tl; 1039 register caddr_t cp; 1040 register int32_t t1, t2; 1041 caddr_t bpos, dpos, cp2; 1042 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1043 struct nfsmount *nmp; 1044 int error = 0, len, retlen, tsiz, eof, attrflag; 1045 int v3 = NFS_ISV3(vp); 1046 1047#ifndef nolint 1048 eof = 0; 1049#endif 1050 nmp = VFSTONFS(vp->v_mount); 1051 tsiz = uiop->uio_resid; 1052 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1053 return (EFBIG); 1054 while (tsiz > 0) { 1055 nfsstats.rpccnt[NFSPROC_READ]++; 1056 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1057 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1058 nfsm_fhtom(vp, v3); 1059 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1060 if (v3) { 1061 txdr_hyper(&uiop->uio_offset, tl); 1062 *(tl + 2) = txdr_unsigned(len); 1063 } else { 1064 *tl++ = txdr_unsigned(uiop->uio_offset); 1065 *tl++ = txdr_unsigned(len); 1066 *tl = 0; 1067 } 1068 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 1069 if (v3) { 1070 nfsm_postop_attr(vp, attrflag); 1071 if (error) { 1072 m_freem(mrep); 1073 goto nfsmout; 1074 } 1075 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1076 eof = fxdr_unsigned(int, *(tl + 1)); 1077 } else 1078 nfsm_loadattr(vp, (struct vattr *)0); 1079 nfsm_strsiz(retlen, nmp->nm_rsize); 1080 nfsm_mtouio(uiop, retlen); 1081 m_freem(mrep); 1082 tsiz -= retlen; 1083 if (v3) { 1084 if (eof || retlen == 0) 1085 tsiz = 0; 1086 } else if (retlen < len) 1087 tsiz = 0; 1088 } 1089nfsmout: 1090 return (error); 1091} 1092 1093/* 1094 * nfs write call 1095 */ 1096int 1097nfs_writerpc(vp, uiop, cred, iomode, must_commit) 1098 register struct vnode *vp; 1099 register struct uio *uiop; 1100 struct ucred *cred; 1101 int *iomode, *must_commit; 1102{ 1103 register u_int32_t *tl; 1104 register caddr_t cp; 1105 register int32_t t1, t2, backup; 1106 caddr_t bpos, dpos, cp2; 1107 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1108 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1109 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1110 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1111 1112#ifndef DIAGNOSTIC 1113 if (uiop->uio_iovcnt != 1) 1114 panic("nfs: writerpc iovcnt > 1"); 1115#endif 1116 *must_commit = 0; 1117 tsiz = uiop->uio_resid; 1118 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1119 return (EFBIG); 1120 while (tsiz > 0) { 1121 nfsstats.rpccnt[NFSPROC_WRITE]++; 1122 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1123 nfsm_reqhead(vp, NFSPROC_WRITE, 1124 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1125 nfsm_fhtom(vp, v3); 1126 if (v3) { 1127 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1128 txdr_hyper(&uiop->uio_offset, tl); 1129 tl += 2; 1130 *tl++ = txdr_unsigned(len); 1131 *tl++ = txdr_unsigned(*iomode); 1132 *tl = txdr_unsigned(len); 1133 } else { 1134 register u_int32_t x; 1135 1136 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1137 /* Set both "begin" and "current" to non-garbage. */ 1138 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1139 *tl++ = x; /* "begin offset" */ 1140 *tl++ = x; /* "current offset" */ 1141 x = txdr_unsigned(len); 1142 *tl++ = x; /* total to this offset */ 1143 *tl = x; /* size of this write */ 1144 } 1145 nfsm_uiotom(uiop, len); 1146 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 1147 if (v3) { 1148 wccflag = NFSV3_WCCCHK; 1149 nfsm_wcc_data(vp, wccflag); 1150 if (!error) { 1151 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1152 + NFSX_V3WRITEVERF); 1153 rlen = fxdr_unsigned(int, *tl++); 1154 if (rlen == 0) { 1155 error = NFSERR_IO; 1156 m_freem(mrep); 1157 break; 1158 } else if (rlen < len) { 1159 backup = len - rlen; 1160 uiop->uio_iov->iov_base -= backup; 1161 uiop->uio_iov->iov_len += backup; 1162 uiop->uio_offset -= backup; 1163 uiop->uio_resid += backup; 1164 len = rlen; 1165 } 1166 commit = fxdr_unsigned(int, *tl++); 1167 1168 /* 1169 * Return the lowest committment level 1170 * obtained by any of the RPCs. 1171 */ 1172 if (committed == NFSV3WRITE_FILESYNC) 1173 committed = commit; 1174 else if (committed == NFSV3WRITE_DATASYNC && 1175 commit == NFSV3WRITE_UNSTABLE) 1176 committed = commit; 1177 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ 1178 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1179 NFSX_V3WRITEVERF); 1180 nmp->nm_state |= NFSSTA_HASWRITEVERF; 1181 } else if (bcmp((caddr_t)tl, 1182 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1183 *must_commit = 1; 1184 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1185 NFSX_V3WRITEVERF); 1186 } 1187 } 1188 } else 1189 nfsm_loadattr(vp, (struct vattr *)0); 1190 if (wccflag) 1191 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec; 1192 m_freem(mrep); 1193 if (error) 1194 break; 1195 tsiz -= len; 1196 } 1197nfsmout: 1198 if (vp->v_mount->mnt_flag & MNT_ASYNC) 1199 committed = NFSV3WRITE_FILESYNC; 1200 *iomode = committed; 1201 if (error) 1202 uiop->uio_resid = tsiz; 1203 return (error); 1204} 1205 1206/* 1207 * nfs mknod rpc 1208 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1209 * mode set to specify the file type and the size field for rdev. 1210 */ 1211static int 1212nfs_mknodrpc(dvp, vpp, cnp, vap) 1213 register struct vnode *dvp; 1214 register struct vnode **vpp; 1215 register struct componentname *cnp; 1216 register struct vattr *vap; 1217{ 1218 register struct nfsv2_sattr *sp; 1219 register struct nfsv3_sattr *sp3; 1220 register u_int32_t *tl; 1221 register caddr_t cp; 1222 register int32_t t1, t2; 1223 struct vnode *newvp = (struct vnode *)0; 1224 struct nfsnode *np = (struct nfsnode *)0; 1225 struct vattr vattr; 1226 char *cp2; 1227 caddr_t bpos, dpos; 1228 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1229 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1230 u_int32_t rdev; 1231 int v3 = NFS_ISV3(dvp); 1232 1233 if (vap->va_type == VCHR || vap->va_type == VBLK) 1234 rdev = txdr_unsigned(vap->va_rdev); 1235 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1236 rdev = nfs_xdrneg1; 1237 else { 1238 VOP_ABORTOP(dvp, cnp); 1239 return (EOPNOTSUPP); 1240 } 1241 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1242 VOP_ABORTOP(dvp, cnp); 1243 return (error); 1244 } 1245 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1246 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1247 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1248 nfsm_fhtom(dvp, v3); 1249 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1250 if (v3) { 1251 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3SRVSATTR); 1252 *tl++ = vtonfsv3_type(vap->va_type); 1253 sp3 = (struct nfsv3_sattr *)tl; 1254 nfsm_v3sattr(sp3, vap); 1255 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1256 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1257 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1258 *tl = txdr_unsigned(minor(vap->va_rdev)); 1259 } 1260 } else { 1261 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1262 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1263 sp->sa_uid = nfs_xdrneg1; 1264 sp->sa_gid = nfs_xdrneg1; 1265 sp->sa_size = rdev; 1266 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1267 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1268 } 1269 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1270 if (!error) { 1271 nfsm_mtofh(dvp, newvp, v3, gotvp); 1272 if (!gotvp) { 1273 if (newvp) { 1274 vput(newvp); 1275 newvp = (struct vnode *)0; 1276 } 1277 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1278 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1279 if (!error) 1280 newvp = NFSTOV(np); 1281 } 1282 } 1283 if (v3) 1284 nfsm_wcc_data(dvp, wccflag); 1285 nfsm_reqdone; 1286 if (error) { 1287 if (newvp) 1288 vput(newvp); 1289 } else { 1290 if (cnp->cn_flags & MAKEENTRY) 1291 cache_enter(dvp, newvp, cnp); 1292 *vpp = newvp; 1293 } 1294 zfree(namei_zone, cnp->cn_pnbuf); 1295 VTONFS(dvp)->n_flag |= NMODIFIED; 1296 if (!wccflag) 1297 VTONFS(dvp)->n_attrstamp = 0; 1298 return (error); 1299} 1300 1301/* 1302 * nfs mknod vop 1303 * just call nfs_mknodrpc() to do the work. 1304 */ 1305/* ARGSUSED */ 1306static int 1307nfs_mknod(ap) 1308 struct vop_mknod_args /* { 1309 struct vnode *a_dvp; 1310 struct vnode **a_vpp; 1311 struct componentname *a_cnp; 1312 struct vattr *a_vap; 1313 } */ *ap; 1314{ 1315 struct vnode *newvp; 1316 int error; 1317 1318 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1319 if (!error) 1320 vput(newvp); 1321 return (error); 1322} 1323 1324static u_long create_verf; 1325/* 1326 * nfs file create call 1327 */ 1328static int 1329nfs_create(ap) 1330 struct vop_create_args /* { 1331 struct vnode *a_dvp; 1332 struct vnode **a_vpp; 1333 struct componentname *a_cnp; 1334 struct vattr *a_vap; 1335 } */ *ap; 1336{ 1337 register struct vnode *dvp = ap->a_dvp; 1338 register struct vattr *vap = ap->a_vap; 1339 register struct componentname *cnp = ap->a_cnp; 1340 register struct nfsv2_sattr *sp; 1341 register struct nfsv3_sattr *sp3; 1342 register u_int32_t *tl; 1343 register caddr_t cp; 1344 register int32_t t1, t2; 1345 struct nfsnode *np = (struct nfsnode *)0; 1346 struct vnode *newvp = (struct vnode *)0; 1347 caddr_t bpos, dpos, cp2; 1348 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1349 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1350 struct vattr vattr; 1351 int v3 = NFS_ISV3(dvp); 1352 1353 /* 1354 * Oops, not for me.. 1355 */ 1356 if (vap->va_type == VSOCK) 1357 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1358 1359 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1360 VOP_ABORTOP(dvp, cnp); 1361 return (error); 1362 } 1363 if (vap->va_vaflags & VA_EXCLUSIVE) 1364 fmode |= O_EXCL; 1365again: 1366 nfsstats.rpccnt[NFSPROC_CREATE]++; 1367 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1368 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1369 nfsm_fhtom(dvp, v3); 1370 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1371 if (v3) { 1372 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1373 if (fmode & O_EXCL) { 1374 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1375 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1376#ifdef INET 1377 if (!TAILQ_EMPTY(&in_ifaddrhead)) 1378 *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr; 1379 else 1380#endif 1381 *tl++ = create_verf; 1382 *tl = ++create_verf; 1383 } else { 1384 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1385 nfsm_build(tl, u_int32_t *, NFSX_V3SRVSATTR); 1386 sp3 = (struct nfsv3_sattr *)tl; 1387 nfsm_v3sattr(sp3, vap); 1388 } 1389 } else { 1390 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1391 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1392 sp->sa_uid = nfs_xdrneg1; 1393 sp->sa_gid = nfs_xdrneg1; 1394 sp->sa_size = 0; 1395 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1396 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1397 } 1398 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1399 if (!error) { 1400 nfsm_mtofh(dvp, newvp, v3, gotvp); 1401 if (!gotvp) { 1402 if (newvp) { 1403 vput(newvp); 1404 newvp = (struct vnode *)0; 1405 } 1406 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1407 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1408 if (!error) 1409 newvp = NFSTOV(np); 1410 } 1411 } 1412 if (v3) 1413 nfsm_wcc_data(dvp, wccflag); 1414 nfsm_reqdone; 1415 if (error) { 1416 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1417 fmode &= ~O_EXCL; 1418 goto again; 1419 } 1420 if (newvp) 1421 vput(newvp); 1422 } else if (v3 && (fmode & O_EXCL)) 1423 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1424 if (!error) { 1425 if (cnp->cn_flags & MAKEENTRY) 1426 cache_enter(dvp, newvp, cnp); 1427 *ap->a_vpp = newvp; 1428 } 1429 zfree(namei_zone, cnp->cn_pnbuf); 1430 VTONFS(dvp)->n_flag |= NMODIFIED; 1431 if (!wccflag) 1432 VTONFS(dvp)->n_attrstamp = 0; 1433 return (error); 1434} 1435 1436/* 1437 * nfs file remove call 1438 * To try and make nfs semantics closer to ufs semantics, a file that has 1439 * other processes using the vnode is renamed instead of removed and then 1440 * removed later on the last close. 1441 * - If v_usecount > 1 1442 * If a rename is not already in the works 1443 * call nfs_sillyrename() to set it up 1444 * else 1445 * do the remove rpc 1446 */ 1447static int 1448nfs_remove(ap) 1449 struct vop_remove_args /* { 1450 struct vnodeop_desc *a_desc; 1451 struct vnode * a_dvp; 1452 struct vnode * a_vp; 1453 struct componentname * a_cnp; 1454 } */ *ap; 1455{ 1456 register struct vnode *vp = ap->a_vp; 1457 register struct vnode *dvp = ap->a_dvp; 1458 register struct componentname *cnp = ap->a_cnp; 1459 register struct nfsnode *np = VTONFS(vp); 1460 int error = 0; 1461 struct vattr vattr; 1462 1463#ifndef DIAGNOSTIC 1464 if ((cnp->cn_flags & HASBUF) == 0) 1465 panic("nfs_remove: no name"); 1466 if (vp->v_usecount < 1) 1467 panic("nfs_remove: bad v_usecount"); 1468#endif 1469 if (vp->v_type == VDIR) 1470 error = EPERM; 1471 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1472 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1473 vattr.va_nlink > 1)) { 1474 /* 1475 * Purge the name cache so that the chance of a lookup for 1476 * the name succeeding while the remove is in progress is 1477 * minimized. Without node locking it can still happen, such 1478 * that an I/O op returns ESTALE, but since you get this if 1479 * another host removes the file.. 1480 */ 1481 cache_purge(vp); 1482 /* 1483 * throw away biocache buffers, mainly to avoid 1484 * unnecessary delayed writes later. 1485 */ 1486 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1487 /* Do the rpc */ 1488 if (error != EINTR) 1489 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1490 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1491 /* 1492 * Kludge City: If the first reply to the remove rpc is lost.. 1493 * the reply to the retransmitted request will be ENOENT 1494 * since the file was in fact removed 1495 * Therefore, we cheat and return success. 1496 */ 1497 if (error == ENOENT) 1498 error = 0; 1499 } else if (!np->n_sillyrename) 1500 error = nfs_sillyrename(dvp, vp, cnp); 1501 zfree(namei_zone, cnp->cn_pnbuf); 1502 np->n_attrstamp = 0; 1503 return (error); 1504} 1505 1506/* 1507 * nfs file remove rpc called from nfs_inactive 1508 */ 1509int 1510nfs_removeit(sp) 1511 register struct sillyrename *sp; 1512{ 1513 1514 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1515 (struct proc *)0)); 1516} 1517 1518/* 1519 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1520 */ 1521static int 1522nfs_removerpc(dvp, name, namelen, cred, proc) 1523 register struct vnode *dvp; 1524 const char *name; 1525 int namelen; 1526 struct ucred *cred; 1527 struct proc *proc; 1528{ 1529 register u_int32_t *tl; 1530 register caddr_t cp; 1531 register int32_t t1, t2; 1532 caddr_t bpos, dpos, cp2; 1533 int error = 0, wccflag = NFSV3_WCCRATTR; 1534 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1535 int v3 = NFS_ISV3(dvp); 1536 1537 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1538 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1539 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1540 nfsm_fhtom(dvp, v3); 1541 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1542 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1543 if (v3) 1544 nfsm_wcc_data(dvp, wccflag); 1545 nfsm_reqdone; 1546 VTONFS(dvp)->n_flag |= NMODIFIED; 1547 if (!wccflag) 1548 VTONFS(dvp)->n_attrstamp = 0; 1549 return (error); 1550} 1551 1552/* 1553 * nfs file rename call 1554 */ 1555static int 1556nfs_rename(ap) 1557 struct vop_rename_args /* { 1558 struct vnode *a_fdvp; 1559 struct vnode *a_fvp; 1560 struct componentname *a_fcnp; 1561 struct vnode *a_tdvp; 1562 struct vnode *a_tvp; 1563 struct componentname *a_tcnp; 1564 } */ *ap; 1565{ 1566 register struct vnode *fvp = ap->a_fvp; 1567 register struct vnode *tvp = ap->a_tvp; 1568 register struct vnode *fdvp = ap->a_fdvp; 1569 register struct vnode *tdvp = ap->a_tdvp; 1570 register struct componentname *tcnp = ap->a_tcnp; 1571 register struct componentname *fcnp = ap->a_fcnp; 1572 int error; 1573 1574#ifndef DIAGNOSTIC 1575 if ((tcnp->cn_flags & HASBUF) == 0 || 1576 (fcnp->cn_flags & HASBUF) == 0) 1577 panic("nfs_rename: no name"); 1578#endif 1579 /* Check for cross-device rename */ 1580 if ((fvp->v_mount != tdvp->v_mount) || 1581 (tvp && (fvp->v_mount != tvp->v_mount))) { 1582 error = EXDEV; 1583 goto out; 1584 } 1585 1586 /* 1587 * If the tvp exists and is in use, sillyrename it before doing the 1588 * rename of the new file over it. 1589 * XXX Can't sillyrename a directory. 1590 */ 1591 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1592 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1593 vput(tvp); 1594 tvp = NULL; 1595 } 1596 1597 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1598 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1599 tcnp->cn_proc); 1600 1601 if (fvp->v_type == VDIR) { 1602 if (tvp != NULL && tvp->v_type == VDIR) 1603 cache_purge(tdvp); 1604 cache_purge(fdvp); 1605 } 1606out: 1607 if (tdvp == tvp) 1608 vrele(tdvp); 1609 else 1610 vput(tdvp); 1611 if (tvp) 1612 vput(tvp); 1613 vrele(fdvp); 1614 vrele(fvp); 1615 /* 1616 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1617 */ 1618 if (error == ENOENT) 1619 error = 0; 1620 return (error); 1621} 1622 1623/* 1624 * nfs file rename rpc called from nfs_remove() above 1625 */ 1626static int 1627nfs_renameit(sdvp, scnp, sp) 1628 struct vnode *sdvp; 1629 struct componentname *scnp; 1630 register struct sillyrename *sp; 1631{ 1632 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1633 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1634} 1635 1636/* 1637 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1638 */ 1639static int 1640nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1641 register struct vnode *fdvp; 1642 const char *fnameptr; 1643 int fnamelen; 1644 register struct vnode *tdvp; 1645 const char *tnameptr; 1646 int tnamelen; 1647 struct ucred *cred; 1648 struct proc *proc; 1649{ 1650 register u_int32_t *tl; 1651 register caddr_t cp; 1652 register int32_t t1, t2; 1653 caddr_t bpos, dpos, cp2; 1654 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1655 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1656 int v3 = NFS_ISV3(fdvp); 1657 1658 nfsstats.rpccnt[NFSPROC_RENAME]++; 1659 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1660 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1661 nfsm_rndup(tnamelen)); 1662 nfsm_fhtom(fdvp, v3); 1663 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1664 nfsm_fhtom(tdvp, v3); 1665 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1666 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1667 if (v3) { 1668 nfsm_wcc_data(fdvp, fwccflag); 1669 nfsm_wcc_data(tdvp, twccflag); 1670 } 1671 nfsm_reqdone; 1672 VTONFS(fdvp)->n_flag |= NMODIFIED; 1673 VTONFS(tdvp)->n_flag |= NMODIFIED; 1674 if (!fwccflag) 1675 VTONFS(fdvp)->n_attrstamp = 0; 1676 if (!twccflag) 1677 VTONFS(tdvp)->n_attrstamp = 0; 1678 return (error); 1679} 1680 1681/* 1682 * nfs hard link create call 1683 */ 1684static int 1685nfs_link(ap) 1686 struct vop_link_args /* { 1687 struct vnode *a_tdvp; 1688 struct vnode *a_vp; 1689 struct componentname *a_cnp; 1690 } */ *ap; 1691{ 1692 register struct vnode *vp = ap->a_vp; 1693 register struct vnode *tdvp = ap->a_tdvp; 1694 register struct componentname *cnp = ap->a_cnp; 1695 register u_int32_t *tl; 1696 register caddr_t cp; 1697 register int32_t t1, t2; 1698 caddr_t bpos, dpos, cp2; 1699 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1700 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1701 int v3 = NFS_ISV3(vp); 1702 1703 if (vp->v_mount != tdvp->v_mount) { 1704 VOP_ABORTOP(tdvp, cnp); 1705 return (EXDEV); 1706 } 1707 1708 /* 1709 * Push all writes to the server, so that the attribute cache 1710 * doesn't get "out of sync" with the server. 1711 * XXX There should be a better way! 1712 */ 1713 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc); 1714 1715 nfsstats.rpccnt[NFSPROC_LINK]++; 1716 nfsm_reqhead(vp, NFSPROC_LINK, 1717 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1718 nfsm_fhtom(vp, v3); 1719 nfsm_fhtom(tdvp, v3); 1720 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1721 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1722 if (v3) { 1723 nfsm_postop_attr(vp, attrflag); 1724 nfsm_wcc_data(tdvp, wccflag); 1725 } 1726 nfsm_reqdone; 1727 zfree(namei_zone, cnp->cn_pnbuf); 1728 VTONFS(tdvp)->n_flag |= NMODIFIED; 1729 if (!attrflag) 1730 VTONFS(vp)->n_attrstamp = 0; 1731 if (!wccflag) 1732 VTONFS(tdvp)->n_attrstamp = 0; 1733 /* 1734 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1735 */ 1736 if (error == EEXIST) 1737 error = 0; 1738 return (error); 1739} 1740 1741/* 1742 * nfs symbolic link create call 1743 */ 1744static int 1745nfs_symlink(ap) 1746 struct vop_symlink_args /* { 1747 struct vnode *a_dvp; 1748 struct vnode **a_vpp; 1749 struct componentname *a_cnp; 1750 struct vattr *a_vap; 1751 char *a_target; 1752 } */ *ap; 1753{ 1754 register struct vnode *dvp = ap->a_dvp; 1755 register struct vattr *vap = ap->a_vap; 1756 register struct componentname *cnp = ap->a_cnp; 1757 register struct nfsv2_sattr *sp; 1758 register struct nfsv3_sattr *sp3; 1759 register u_int32_t *tl; 1760 register caddr_t cp; 1761 register int32_t t1, t2; 1762 caddr_t bpos, dpos, cp2; 1763 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1764 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1765 struct vnode *newvp = (struct vnode *)0; 1766 int v3 = NFS_ISV3(dvp); 1767 1768 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1769 slen = strlen(ap->a_target); 1770 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1771 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1772 nfsm_fhtom(dvp, v3); 1773 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1774 if (v3) { 1775 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1776 nfsm_v3sattr(sp3, vap); 1777 } 1778 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1779 if (!v3) { 1780 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1781 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1782 sp->sa_uid = nfs_xdrneg1; 1783 sp->sa_gid = nfs_xdrneg1; 1784 sp->sa_size = nfs_xdrneg1; 1785 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1786 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1787 } 1788 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1789 if (v3) { 1790 if (!error) 1791 nfsm_mtofh(dvp, newvp, v3, gotvp); 1792 nfsm_wcc_data(dvp, wccflag); 1793 } 1794 nfsm_reqdone; 1795 if (newvp) 1796 vput(newvp); 1797 zfree(namei_zone, cnp->cn_pnbuf); 1798 VTONFS(dvp)->n_flag |= NMODIFIED; 1799 if (!wccflag) 1800 VTONFS(dvp)->n_attrstamp = 0; 1801 /* 1802 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1803 */ 1804 if (error == EEXIST) 1805 error = 0; 1806 return (error); 1807} 1808 1809/* 1810 * nfs make dir call 1811 */ 1812static int 1813nfs_mkdir(ap) 1814 struct vop_mkdir_args /* { 1815 struct vnode *a_dvp; 1816 struct vnode **a_vpp; 1817 struct componentname *a_cnp; 1818 struct vattr *a_vap; 1819 } */ *ap; 1820{ 1821 register struct vnode *dvp = ap->a_dvp; 1822 register struct vattr *vap = ap->a_vap; 1823 register struct componentname *cnp = ap->a_cnp; 1824 register struct nfsv2_sattr *sp; 1825 register struct nfsv3_sattr *sp3; 1826 register u_int32_t *tl; 1827 register caddr_t cp; 1828 register int32_t t1, t2; 1829 register int len; 1830 struct nfsnode *np = (struct nfsnode *)0; 1831 struct vnode *newvp = (struct vnode *)0; 1832 caddr_t bpos, dpos, cp2; 1833 int error = 0, wccflag = NFSV3_WCCRATTR; 1834 int gotvp = 0; 1835 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1836 struct vattr vattr; 1837 int v3 = NFS_ISV3(dvp); 1838 1839 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1840 VOP_ABORTOP(dvp, cnp); 1841 return (error); 1842 } 1843 len = cnp->cn_namelen; 1844 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1845 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1846 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1847 nfsm_fhtom(dvp, v3); 1848 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1849 if (v3) { 1850 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1851 nfsm_v3sattr(sp3, vap); 1852 } else { 1853 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1854 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1855 sp->sa_uid = nfs_xdrneg1; 1856 sp->sa_gid = nfs_xdrneg1; 1857 sp->sa_size = nfs_xdrneg1; 1858 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1859 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1860 } 1861 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1862 if (!error) 1863 nfsm_mtofh(dvp, newvp, v3, gotvp); 1864 if (v3) 1865 nfsm_wcc_data(dvp, wccflag); 1866 nfsm_reqdone; 1867 VTONFS(dvp)->n_flag |= NMODIFIED; 1868 if (!wccflag) 1869 VTONFS(dvp)->n_attrstamp = 0; 1870 /* 1871 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1872 * if we can succeed in looking up the directory. 1873 */ 1874 if (error == EEXIST || (!error && !gotvp)) { 1875 if (newvp) { 1876 vrele(newvp); 1877 newvp = (struct vnode *)0; 1878 } 1879 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1880 cnp->cn_proc, &np); 1881 if (!error) { 1882 newvp = NFSTOV(np); 1883 if (newvp->v_type != VDIR) 1884 error = EEXIST; 1885 } 1886 } 1887 if (error) { 1888 if (newvp) 1889 vrele(newvp); 1890 } else 1891 *ap->a_vpp = newvp; 1892 zfree(namei_zone, cnp->cn_pnbuf); 1893 return (error); 1894} 1895 1896/* 1897 * nfs remove directory call 1898 */ 1899static int 1900nfs_rmdir(ap) 1901 struct vop_rmdir_args /* { 1902 struct vnode *a_dvp; 1903 struct vnode *a_vp; 1904 struct componentname *a_cnp; 1905 } */ *ap; 1906{ 1907 register struct vnode *vp = ap->a_vp; 1908 register struct vnode *dvp = ap->a_dvp; 1909 register struct componentname *cnp = ap->a_cnp; 1910 register u_int32_t *tl; 1911 register caddr_t cp; 1912 register int32_t t1, t2; 1913 caddr_t bpos, dpos, cp2; 1914 int error = 0, wccflag = NFSV3_WCCRATTR; 1915 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1916 int v3 = NFS_ISV3(dvp); 1917 1918 if (dvp == vp) 1919 return (EINVAL); 1920 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1921 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1922 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1923 nfsm_fhtom(dvp, v3); 1924 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1925 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1926 if (v3) 1927 nfsm_wcc_data(dvp, wccflag); 1928 nfsm_reqdone; 1929 zfree(namei_zone, cnp->cn_pnbuf); 1930 VTONFS(dvp)->n_flag |= NMODIFIED; 1931 if (!wccflag) 1932 VTONFS(dvp)->n_attrstamp = 0; 1933 cache_purge(dvp); 1934 cache_purge(vp); 1935 /* 1936 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1937 */ 1938 if (error == ENOENT) 1939 error = 0; 1940 return (error); 1941} 1942 1943/* 1944 * nfs readdir call 1945 */ 1946static int 1947nfs_readdir(ap) 1948 struct vop_readdir_args /* { 1949 struct vnode *a_vp; 1950 struct uio *a_uio; 1951 struct ucred *a_cred; 1952 } */ *ap; 1953{ 1954 register struct vnode *vp = ap->a_vp; 1955 register struct nfsnode *np = VTONFS(vp); 1956 register struct uio *uio = ap->a_uio; 1957 int tresid, error; 1958 struct vattr vattr; 1959 1960 if (vp->v_type != VDIR) 1961 return (EPERM); 1962 /* 1963 * First, check for hit on the EOF offset cache 1964 */ 1965 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 1966 (np->n_flag & NMODIFIED) == 0) { 1967 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { 1968 if (NQNFS_CKCACHABLE(vp, ND_READ)) { 1969 nfsstats.direofcache_hits++; 1970 return (0); 1971 } 1972 } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 && 1973 np->n_mtime == vattr.va_mtime.tv_sec) { 1974 nfsstats.direofcache_hits++; 1975 return (0); 1976 } 1977 } 1978 1979 /* 1980 * Call nfs_bioread() to do the real work. 1981 */ 1982 tresid = uio->uio_resid; 1983 error = nfs_bioread(vp, uio, 0, ap->a_cred, 0); 1984 1985 if (!error && uio->uio_resid == tresid) 1986 nfsstats.direofcache_misses++; 1987 return (error); 1988} 1989 1990/* 1991 * Readdir rpc call. 1992 * Called from below the buffer cache by nfs_doio(). 1993 */ 1994int 1995nfs_readdirrpc(vp, uiop, cred) 1996 struct vnode *vp; 1997 register struct uio *uiop; 1998 struct ucred *cred; 1999 2000{ 2001 register int len, left; 2002 register struct dirent *dp; 2003 register u_int32_t *tl; 2004 register caddr_t cp; 2005 register int32_t t1, t2; 2006 register nfsuint64 *cookiep; 2007 caddr_t bpos, dpos, cp2; 2008 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2009 nfsuint64 cookie; 2010 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2011 struct nfsnode *dnp = VTONFS(vp); 2012 u_quad_t fileno; 2013 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2014 int attrflag; 2015 int v3 = NFS_ISV3(vp); 2016 2017#ifndef nolint 2018 dp = (struct dirent *)0; 2019#endif 2020#ifndef DIAGNOSTIC 2021 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (NFS_DIRBLKSIZ - 1)) || 2022 (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2023 panic("nfs readdirrpc bad uio"); 2024#endif 2025 2026 /* 2027 * If there is no cookie, assume directory was stale. 2028 */ 2029 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2030 if (cookiep) 2031 cookie = *cookiep; 2032 else 2033 return (NFSERR_BAD_COOKIE); 2034 /* 2035 * Loop around doing readdir rpc's of size nm_readdirsize 2036 * truncated to a multiple of DIRBLKSIZ. 2037 * The stopping criteria is EOF or buffer full. 2038 */ 2039 while (more_dirs && bigenough) { 2040 nfsstats.rpccnt[NFSPROC_READDIR]++; 2041 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2042 NFSX_READDIR(v3)); 2043 nfsm_fhtom(vp, v3); 2044 if (v3) { 2045 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2046 *tl++ = cookie.nfsuquad[0]; 2047 *tl++ = cookie.nfsuquad[1]; 2048 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2049 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2050 } else { 2051 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2052 *tl++ = cookie.nfsuquad[0]; 2053 } 2054 *tl = txdr_unsigned(nmp->nm_readdirsize); 2055 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2056 if (v3) { 2057 nfsm_postop_attr(vp, attrflag); 2058 if (!error) { 2059 nfsm_dissect(tl, u_int32_t *, 2060 2 * NFSX_UNSIGNED); 2061 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2062 dnp->n_cookieverf.nfsuquad[1] = *tl; 2063 } else { 2064 m_freem(mrep); 2065 goto nfsmout; 2066 } 2067 } 2068 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2069 more_dirs = fxdr_unsigned(int, *tl); 2070 2071 /* loop thru the dir entries, doctoring them to 4bsd form */ 2072 while (more_dirs && bigenough) { 2073 if (v3) { 2074 nfsm_dissect(tl, u_int32_t *, 2075 3 * NFSX_UNSIGNED); 2076 fxdr_hyper(tl, &fileno); 2077 len = fxdr_unsigned(int, *(tl + 2)); 2078 } else { 2079 nfsm_dissect(tl, u_int32_t *, 2080 2 * NFSX_UNSIGNED); 2081 fileno = fxdr_unsigned(u_quad_t, *tl++); 2082 len = fxdr_unsigned(int, *tl); 2083 } 2084 if (len <= 0 || len > NFS_MAXNAMLEN) { 2085 error = EBADRPC; 2086 m_freem(mrep); 2087 goto nfsmout; 2088 } 2089 tlen = nfsm_rndup(len); 2090 if (tlen == len) 2091 tlen += 4; /* To ensure null termination */ 2092 left = DIRBLKSIZ - blksiz; 2093 if ((tlen + DIRHDSIZ) > left) { 2094 dp->d_reclen += left; 2095 uiop->uio_iov->iov_base += left; 2096 uiop->uio_iov->iov_len -= left; 2097 uiop->uio_offset += left; 2098 uiop->uio_resid -= left; 2099 blksiz = 0; 2100 } 2101 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2102 bigenough = 0; 2103 if (bigenough) { 2104 dp = (struct dirent *)uiop->uio_iov->iov_base; 2105 dp->d_fileno = (int)fileno; 2106 dp->d_namlen = len; 2107 dp->d_reclen = tlen + DIRHDSIZ; 2108 dp->d_type = DT_UNKNOWN; 2109 blksiz += dp->d_reclen; 2110 if (blksiz == DIRBLKSIZ) 2111 blksiz = 0; 2112 uiop->uio_offset += DIRHDSIZ; 2113 uiop->uio_resid -= DIRHDSIZ; 2114 uiop->uio_iov->iov_base += DIRHDSIZ; 2115 uiop->uio_iov->iov_len -= DIRHDSIZ; 2116 nfsm_mtouio(uiop, len); 2117 cp = uiop->uio_iov->iov_base; 2118 tlen -= len; 2119 *cp = '\0'; /* null terminate */ 2120 uiop->uio_iov->iov_base += tlen; 2121 uiop->uio_iov->iov_len -= tlen; 2122 uiop->uio_offset += tlen; 2123 uiop->uio_resid -= tlen; 2124 } else 2125 nfsm_adv(nfsm_rndup(len)); 2126 if (v3) { 2127 nfsm_dissect(tl, u_int32_t *, 2128 3 * NFSX_UNSIGNED); 2129 } else { 2130 nfsm_dissect(tl, u_int32_t *, 2131 2 * NFSX_UNSIGNED); 2132 } 2133 if (bigenough) { 2134 cookie.nfsuquad[0] = *tl++; 2135 if (v3) 2136 cookie.nfsuquad[1] = *tl++; 2137 } else if (v3) 2138 tl += 2; 2139 else 2140 tl++; 2141 more_dirs = fxdr_unsigned(int, *tl); 2142 } 2143 /* 2144 * If at end of rpc data, get the eof boolean 2145 */ 2146 if (!more_dirs) { 2147 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2148 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2149 } 2150 m_freem(mrep); 2151 } 2152 /* 2153 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2154 * by increasing d_reclen for the last record. 2155 */ 2156 if (blksiz > 0) { 2157 left = DIRBLKSIZ - blksiz; 2158 dp->d_reclen += left; 2159 uiop->uio_iov->iov_base += left; 2160 uiop->uio_iov->iov_len -= left; 2161 uiop->uio_offset += left; 2162 uiop->uio_resid -= left; 2163 } 2164 2165 /* 2166 * We are now either at the end of the directory or have filled the 2167 * block. 2168 */ 2169 if (bigenough) 2170 dnp->n_direofoffset = uiop->uio_offset; 2171 else { 2172 if (uiop->uio_resid > 0) 2173 printf("EEK! readdirrpc resid > 0\n"); 2174 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2175 *cookiep = cookie; 2176 } 2177nfsmout: 2178 return (error); 2179} 2180 2181/* 2182 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2183 */ 2184int 2185nfs_readdirplusrpc(vp, uiop, cred) 2186 struct vnode *vp; 2187 register struct uio *uiop; 2188 struct ucred *cred; 2189{ 2190 register int len, left; 2191 register struct dirent *dp; 2192 register u_int32_t *tl; 2193 register caddr_t cp; 2194 register int32_t t1, t2; 2195 register struct vnode *newvp; 2196 register nfsuint64 *cookiep; 2197 caddr_t bpos, dpos, cp2, dpossav1, dpossav2; 2198 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; 2199 struct nameidata nami, *ndp = &nami; 2200 struct componentname *cnp = &ndp->ni_cnd; 2201 nfsuint64 cookie; 2202 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2203 struct nfsnode *dnp = VTONFS(vp), *np; 2204 nfsfh_t *fhp; 2205 u_quad_t fileno; 2206 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2207 int attrflag, fhsize; 2208 2209#ifndef nolint 2210 dp = (struct dirent *)0; 2211#endif 2212#ifndef DIAGNOSTIC 2213 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2214 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2215 panic("nfs readdirplusrpc bad uio"); 2216#endif 2217 ndp->ni_dvp = vp; 2218 newvp = NULLVP; 2219 2220 /* 2221 * If there is no cookie, assume directory was stale. 2222 */ 2223 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2224 if (cookiep) 2225 cookie = *cookiep; 2226 else 2227 return (NFSERR_BAD_COOKIE); 2228 /* 2229 * Loop around doing readdir rpc's of size nm_readdirsize 2230 * truncated to a multiple of DIRBLKSIZ. 2231 * The stopping criteria is EOF or buffer full. 2232 */ 2233 while (more_dirs && bigenough) { 2234 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2235 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2236 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2237 nfsm_fhtom(vp, 1); 2238 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2239 *tl++ = cookie.nfsuquad[0]; 2240 *tl++ = cookie.nfsuquad[1]; 2241 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2242 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2243 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2244 *tl = txdr_unsigned(nmp->nm_rsize); 2245 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2246 nfsm_postop_attr(vp, attrflag); 2247 if (error) { 2248 m_freem(mrep); 2249 goto nfsmout; 2250 } 2251 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2252 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2253 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2254 more_dirs = fxdr_unsigned(int, *tl); 2255 2256 /* loop thru the dir entries, doctoring them to 4bsd form */ 2257 while (more_dirs && bigenough) { 2258 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2259 fxdr_hyper(tl, &fileno); 2260 len = fxdr_unsigned(int, *(tl + 2)); 2261 if (len <= 0 || len > NFS_MAXNAMLEN) { 2262 error = EBADRPC; 2263 m_freem(mrep); 2264 goto nfsmout; 2265 } 2266 tlen = nfsm_rndup(len); 2267 if (tlen == len) 2268 tlen += 4; /* To ensure null termination*/ 2269 left = DIRBLKSIZ - blksiz; 2270 if ((tlen + DIRHDSIZ) > left) { 2271 dp->d_reclen += left; 2272 uiop->uio_iov->iov_base += left; 2273 uiop->uio_iov->iov_len -= left; 2274 uiop->uio_offset += left; 2275 uiop->uio_resid -= left; 2276 blksiz = 0; 2277 } 2278 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2279 bigenough = 0; 2280 if (bigenough) { 2281 dp = (struct dirent *)uiop->uio_iov->iov_base; 2282 dp->d_fileno = (int)fileno; 2283 dp->d_namlen = len; 2284 dp->d_reclen = tlen + DIRHDSIZ; 2285 dp->d_type = DT_UNKNOWN; 2286 blksiz += dp->d_reclen; 2287 if (blksiz == DIRBLKSIZ) 2288 blksiz = 0; 2289 uiop->uio_offset += DIRHDSIZ; 2290 uiop->uio_resid -= DIRHDSIZ; 2291 uiop->uio_iov->iov_base += DIRHDSIZ; 2292 uiop->uio_iov->iov_len -= DIRHDSIZ; 2293 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2294 cnp->cn_namelen = len; 2295 nfsm_mtouio(uiop, len); 2296 cp = uiop->uio_iov->iov_base; 2297 tlen -= len; 2298 *cp = '\0'; 2299 uiop->uio_iov->iov_base += tlen; 2300 uiop->uio_iov->iov_len -= tlen; 2301 uiop->uio_offset += tlen; 2302 uiop->uio_resid -= tlen; 2303 } else 2304 nfsm_adv(nfsm_rndup(len)); 2305 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2306 if (bigenough) { 2307 cookie.nfsuquad[0] = *tl++; 2308 cookie.nfsuquad[1] = *tl++; 2309 } else 2310 tl += 2; 2311 2312 /* 2313 * Since the attributes are before the file handle 2314 * (sigh), we must skip over the attributes and then 2315 * come back and get them. 2316 */ 2317 attrflag = fxdr_unsigned(int, *tl); 2318 if (attrflag) { 2319 dpossav1 = dpos; 2320 mdsav1 = md; 2321 nfsm_adv(NFSX_V3FATTR); 2322 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2323 doit = fxdr_unsigned(int, *tl); 2324 if (doit) { 2325 nfsm_getfh(fhp, fhsize, 1); 2326 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2327 VREF(vp); 2328 newvp = vp; 2329 np = dnp; 2330 } else { 2331 error = nfs_nget(vp->v_mount, fhp, 2332 fhsize, &np); 2333 if (error) 2334 doit = 0; 2335 else 2336 newvp = NFSTOV(np); 2337 } 2338 } 2339 if (doit) { 2340 dpossav2 = dpos; 2341 dpos = dpossav1; 2342 mdsav2 = md; 2343 md = mdsav1; 2344 nfsm_loadattr(newvp, (struct vattr *)0); 2345 dpos = dpossav2; 2346 md = mdsav2; 2347 dp->d_type = 2348 IFTODT(VTTOIF(np->n_vattr.va_type)); 2349 ndp->ni_vp = newvp; 2350 cnp->cn_hash = 0; 2351 for (cp = cnp->cn_nameptr, i = 1; i <= len; 2352 i++, cp++) 2353 cnp->cn_hash += (unsigned char)*cp * i; 2354 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 2355 } 2356 } else { 2357 /* Just skip over the file handle */ 2358 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2359 i = fxdr_unsigned(int, *tl); 2360 nfsm_adv(nfsm_rndup(i)); 2361 } 2362 if (newvp != NULLVP) { 2363 vrele(newvp); 2364 newvp = NULLVP; 2365 } 2366 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2367 more_dirs = fxdr_unsigned(int, *tl); 2368 } 2369 /* 2370 * If at end of rpc data, get the eof boolean 2371 */ 2372 if (!more_dirs) { 2373 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2374 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2375 } 2376 m_freem(mrep); 2377 } 2378 /* 2379 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 2380 * by increasing d_reclen for the last record. 2381 */ 2382 if (blksiz > 0) { 2383 left = DIRBLKSIZ - blksiz; 2384 dp->d_reclen += left; 2385 uiop->uio_iov->iov_base += left; 2386 uiop->uio_iov->iov_len -= left; 2387 uiop->uio_offset += left; 2388 uiop->uio_resid -= left; 2389 } 2390 2391 /* 2392 * We are now either at the end of the directory or have filled the 2393 * block. 2394 */ 2395 if (bigenough) 2396 dnp->n_direofoffset = uiop->uio_offset; 2397 else { 2398 if (uiop->uio_resid > 0) 2399 printf("EEK! readdirplusrpc resid > 0\n"); 2400 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2401 *cookiep = cookie; 2402 } 2403nfsmout: 2404 if (newvp != NULLVP) { 2405 if (newvp == vp) 2406 vrele(newvp); 2407 else 2408 vput(newvp); 2409 newvp = NULLVP; 2410 } 2411 return (error); 2412} 2413 2414/* 2415 * Silly rename. To make the NFS filesystem that is stateless look a little 2416 * more like the "ufs" a remove of an active vnode is translated to a rename 2417 * to a funny looking filename that is removed by nfs_inactive on the 2418 * nfsnode. There is the potential for another process on a different client 2419 * to create the same funny name between the nfs_lookitup() fails and the 2420 * nfs_rename() completes, but... 2421 */ 2422static int 2423nfs_sillyrename(dvp, vp, cnp) 2424 struct vnode *dvp, *vp; 2425 struct componentname *cnp; 2426{ 2427 register struct sillyrename *sp; 2428 struct nfsnode *np; 2429 int error; 2430 short pid; 2431 2432 cache_purge(dvp); 2433 np = VTONFS(vp); 2434#ifndef DIAGNOSTIC 2435 if (vp->v_type == VDIR) 2436 panic("nfs: sillyrename dir"); 2437#endif 2438 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2439 M_NFSREQ, M_WAITOK); 2440 sp->s_cred = crdup(cnp->cn_cred); 2441 sp->s_dvp = dvp; 2442 VREF(dvp); 2443 2444 /* Fudge together a funny name */ 2445 pid = cnp->cn_proc->p_pid; 2446 sp->s_namlen = sprintf(sp->s_name, ".nfsA%04x4.4", pid); 2447 2448 /* Try lookitups until we get one that isn't there */ 2449 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2450 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2451 sp->s_name[4]++; 2452 if (sp->s_name[4] > 'z') { 2453 error = EINVAL; 2454 goto bad; 2455 } 2456 } 2457 error = nfs_renameit(dvp, cnp, sp); 2458 if (error) 2459 goto bad; 2460 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2461 cnp->cn_proc, &np); 2462 np->n_sillyrename = sp; 2463 return (0); 2464bad: 2465 vrele(sp->s_dvp); 2466 crfree(sp->s_cred); 2467 free((caddr_t)sp, M_NFSREQ); 2468 return (error); 2469} 2470 2471/* 2472 * Look up a file name and optionally either update the file handle or 2473 * allocate an nfsnode, depending on the value of npp. 2474 * npp == NULL --> just do the lookup 2475 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2476 * handled too 2477 * *npp != NULL --> update the file handle in the vnode 2478 */ 2479static int 2480nfs_lookitup(dvp, name, len, cred, procp, npp) 2481 register struct vnode *dvp; 2482 const char *name; 2483 int len; 2484 struct ucred *cred; 2485 struct proc *procp; 2486 struct nfsnode **npp; 2487{ 2488 register u_int32_t *tl; 2489 register caddr_t cp; 2490 register int32_t t1, t2; 2491 struct vnode *newvp = (struct vnode *)0; 2492 struct nfsnode *np, *dnp = VTONFS(dvp); 2493 caddr_t bpos, dpos, cp2; 2494 int error = 0, fhlen, attrflag; 2495 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2496 nfsfh_t *nfhp; 2497 int v3 = NFS_ISV3(dvp); 2498 2499 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2500 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2501 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2502 nfsm_fhtom(dvp, v3); 2503 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2504 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2505 if (npp && !error) { 2506 nfsm_getfh(nfhp, fhlen, v3); 2507 if (*npp) { 2508 np = *npp; 2509 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2510 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2511 np->n_fhp = &np->n_fh; 2512 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2513 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2514 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2515 np->n_fhsize = fhlen; 2516 newvp = NFSTOV(np); 2517 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2518 VREF(dvp); 2519 newvp = dvp; 2520 } else { 2521 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2522 if (error) { 2523 m_freem(mrep); 2524 return (error); 2525 } 2526 newvp = NFSTOV(np); 2527 } 2528 if (v3) { 2529 nfsm_postop_attr(newvp, attrflag); 2530 if (!attrflag && *npp == NULL) { 2531 m_freem(mrep); 2532 if (newvp == dvp) 2533 vrele(newvp); 2534 else 2535 vput(newvp); 2536 return (ENOENT); 2537 } 2538 } else 2539 nfsm_loadattr(newvp, (struct vattr *)0); 2540 } 2541 nfsm_reqdone; 2542 if (npp && *npp == NULL) { 2543 if (error) { 2544 if (newvp) 2545 if (newvp == dvp) 2546 vrele(newvp); 2547 else 2548 vput(newvp); 2549 } else 2550 *npp = np; 2551 } 2552 return (error); 2553} 2554 2555/* 2556 * Nfs Version 3 commit rpc 2557 */ 2558static int 2559nfs_commit(vp, offset, cnt, cred, procp) 2560 register struct vnode *vp; 2561 u_quad_t offset; 2562 int cnt; 2563 struct ucred *cred; 2564 struct proc *procp; 2565{ 2566 register caddr_t cp; 2567 register u_int32_t *tl; 2568 register int32_t t1, t2; 2569 register struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2570 caddr_t bpos, dpos, cp2; 2571 int error = 0, wccflag = NFSV3_WCCRATTR; 2572 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2573 2574 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) 2575 return (0); 2576 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2577 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2578 nfsm_fhtom(vp, 1); 2579 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2580 txdr_hyper(&offset, tl); 2581 tl += 2; 2582 *tl = txdr_unsigned(cnt); 2583 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2584 nfsm_wcc_data(vp, wccflag); 2585 if (!error) { 2586 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2587 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2588 NFSX_V3WRITEVERF)) { 2589 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 2590 NFSX_V3WRITEVERF); 2591 error = NFSERR_STALEWRITEVERF; 2592 } 2593 } 2594 nfsm_reqdone; 2595 return (error); 2596} 2597 2598/* 2599 * Kludge City.. 2600 * - make nfs_bmap() essentially a no-op that does no translation 2601 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2602 * (Maybe I could use the process's page mapping, but I was concerned that 2603 * Kernel Write might not be enabled and also figured copyout() would do 2604 * a lot more work than bcopy() and also it currently happens in the 2605 * context of the swapper process (2). 2606 */ 2607static int 2608nfs_bmap(ap) 2609 struct vop_bmap_args /* { 2610 struct vnode *a_vp; 2611 daddr_t a_bn; 2612 struct vnode **a_vpp; 2613 daddr_t *a_bnp; 2614 int *a_runp; 2615 int *a_runb; 2616 } */ *ap; 2617{ 2618 register struct vnode *vp = ap->a_vp; 2619 2620 if (ap->a_vpp != NULL) 2621 *ap->a_vpp = vp; 2622 if (ap->a_bnp != NULL) 2623 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2624 if (ap->a_runp != NULL) 2625 *ap->a_runp = 0; 2626 if (ap->a_runb != NULL) 2627 *ap->a_runb = 0; 2628 return (0); 2629} 2630 2631/* 2632 * Strategy routine. 2633 * For async requests when nfsiod(s) are running, queue the request by 2634 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2635 * request. 2636 */ 2637static int 2638nfs_strategy(ap) 2639 struct vop_strategy_args *ap; 2640{ 2641 register struct buf *bp = ap->a_bp; 2642 struct ucred *cr; 2643 struct proc *p; 2644 int error = 0; 2645 2646 if (bp->b_flags & B_PHYS) 2647 panic("nfs physio"); 2648 if (bp->b_flags & B_ASYNC) 2649 p = (struct proc *)0; 2650 else 2651 p = curproc; /* XXX */ 2652 if (bp->b_flags & B_READ) 2653 cr = bp->b_rcred; 2654 else 2655 cr = bp->b_wcred; 2656 /* 2657 * If the op is asynchronous and an i/o daemon is waiting 2658 * queue the request, wake it up and wait for completion 2659 * otherwise just do it ourselves. 2660 */ 2661 if ((bp->b_flags & B_ASYNC) == 0 || 2662 nfs_asyncio(bp, NOCRED)) 2663 error = nfs_doio(bp, cr, p); 2664 return (error); 2665} 2666 2667/* 2668 * Mmap a file 2669 * 2670 * NB Currently unsupported. 2671 */ 2672/* ARGSUSED */ 2673static int 2674nfs_mmap(ap) 2675 struct vop_mmap_args /* { 2676 struct vnode *a_vp; 2677 int a_fflags; 2678 struct ucred *a_cred; 2679 struct proc *a_p; 2680 } */ *ap; 2681{ 2682 2683 return (EINVAL); 2684} 2685 2686/* 2687 * fsync vnode op. Just call nfs_flush() with commit == 1. 2688 */ 2689/* ARGSUSED */ 2690static int 2691nfs_fsync(ap) 2692 struct vop_fsync_args /* { 2693 struct vnodeop_desc *a_desc; 2694 struct vnode * a_vp; 2695 struct ucred * a_cred; 2696 int a_waitfor; 2697 struct proc * a_p; 2698 } */ *ap; 2699{ 2700 2701 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1)); 2702} 2703 2704/* 2705 * Flush all the blocks associated with a vnode. 2706 * Walk through the buffer pool and push any dirty pages 2707 * associated with the vnode. 2708 */ 2709static int 2710nfs_flush(vp, cred, waitfor, p, commit) 2711 register struct vnode *vp; 2712 struct ucred *cred; 2713 int waitfor; 2714 struct proc *p; 2715 int commit; 2716{ 2717 register struct nfsnode *np = VTONFS(vp); 2718 register struct buf *bp; 2719 register int i; 2720 struct buf *nbp; 2721 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2722 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2723 int passone = 1; 2724 u_quad_t off, endoff, toff; 2725 struct ucred* wcred = NULL; 2726 struct buf **bvec = NULL; 2727#ifndef NFS_COMMITBVECSIZ 2728#define NFS_COMMITBVECSIZ 20 2729#endif 2730 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; 2731 int bvecsize = 0, bveccount; 2732 2733 if (nmp->nm_flag & NFSMNT_INT) 2734 slpflag = PCATCH; 2735 if (!commit) 2736 passone = 0; 2737 /* 2738 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2739 * server, but nas not been committed to stable storage on the server 2740 * yet. On the first pass, the byte range is worked out and the commit 2741 * rpc is done. On the second pass, nfs_writebp() is called to do the 2742 * job. 2743 */ 2744again: 2745 off = (u_quad_t)-1; 2746 endoff = 0; 2747 bvecpos = 0; 2748 if (NFS_ISV3(vp) && commit) { 2749 s = splbio(); 2750 /* 2751 * Count up how many buffers waiting for a commit. 2752 */ 2753 bveccount = 0; 2754 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2755 nbp = bp->b_vnbufs.le_next; 2756 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2757 == (B_DELWRI | B_NEEDCOMMIT)) 2758 bveccount++; 2759 } 2760 /* 2761 * Allocate space to remember the list of bufs to commit. It is 2762 * important to use M_NOWAIT here to avoid a race with nfs_write. 2763 * If we can't get memory (for whatever reason), we will end up 2764 * committing the buffers one-by-one in the loop below. 2765 */ 2766 if (bveccount > NFS_COMMITBVECSIZ) { 2767 if (bvec != NULL && bvec != bvec_on_stack) 2768 free(bvec, M_TEMP); 2769 bvec = (struct buf **) 2770 malloc(bveccount * sizeof(struct buf *), 2771 M_TEMP, M_NOWAIT); 2772 if (bvec == NULL) { 2773 bvec = bvec_on_stack; 2774 bvecsize = NFS_COMMITBVECSIZ; 2775 } else 2776 bvecsize = bveccount; 2777 } else { 2778 bvec = bvec_on_stack; 2779 bvecsize = NFS_COMMITBVECSIZ; 2780 } 2781 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2782 nbp = bp->b_vnbufs.le_next; 2783 if (bvecpos >= bvecsize) 2784 break; 2785 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2786 != (B_DELWRI | B_NEEDCOMMIT)) 2787 continue; 2788 bremfree(bp); 2789 /* 2790 * Work out if all buffers are using the same cred 2791 * so we can deal with them all with one commit. 2792 */ 2793 if (wcred == NULL) 2794 wcred = bp->b_wcred; 2795 else if (wcred != bp->b_wcred) 2796 wcred = NOCRED; 2797 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2798 vfs_busy_pages(bp, 1); 2799 /* 2800 * A list of these buffers is kept so that the 2801 * second loop knows which buffers have actually 2802 * been committed. This is necessary, since there 2803 * may be a race between the commit rpc and new 2804 * uncommitted writes on the file. 2805 */ 2806 bvec[bvecpos++] = bp; 2807 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2808 bp->b_dirtyoff; 2809 if (toff < off) 2810 off = toff; 2811 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2812 if (toff > endoff) 2813 endoff = toff; 2814 } 2815 splx(s); 2816 } 2817 if (bvecpos > 0) { 2818 /* 2819 * Commit data on the server, as required. 2820 * If all bufs are using the same wcred, then use that with 2821 * one call for all of them, otherwise commit each one 2822 * separately. 2823 */ 2824 if (wcred != NOCRED) 2825 retv = nfs_commit(vp, off, (int)(endoff - off), 2826 wcred, p); 2827 else { 2828 retv = 0; 2829 for (i = 0; i < bvecpos; i++) { 2830 off_t off, size; 2831 bp = bvec[i]; 2832 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2833 bp->b_dirtyoff; 2834 size = (u_quad_t)(bp->b_dirtyend 2835 - bp->b_dirtyoff); 2836 retv = nfs_commit(vp, off, (int)size, 2837 bp->b_wcred, p); 2838 if (retv) break; 2839 } 2840 } 2841 2842 if (retv == NFSERR_STALEWRITEVERF) 2843 nfs_clearcommit(vp->v_mount); 2844 /* 2845 * Now, either mark the blocks I/O done or mark the 2846 * blocks dirty, depending on whether the commit 2847 * succeeded. 2848 */ 2849 for (i = 0; i < bvecpos; i++) { 2850 bp = bvec[i]; 2851 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2852 if (retv) { 2853 vfs_unbusy_pages(bp); 2854 brelse(bp); 2855 } else { 2856 vp->v_numoutput++; 2857 bp->b_flags |= B_ASYNC; 2858 if (bp->b_flags & B_DELWRI) { 2859 --numdirtybuffers; 2860 if (needsbuffer) { 2861 vfs_bio_need_satisfy(); 2862 } 2863 } 2864 s = splbio(); /* XXX check this positionning */ 2865 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2866 bp->b_dirtyoff = bp->b_dirtyend = 0; 2867 reassignbuf(bp, vp); 2868 splx(s); 2869 biodone(bp); 2870 } 2871 } 2872 } 2873 2874 /* 2875 * Start/do any write(s) that are required. 2876 */ 2877loop: 2878 s = splbio(); 2879 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2880 nbp = bp->b_vnbufs.le_next; 2881 if (bp->b_flags & B_BUSY) { 2882 if (waitfor != MNT_WAIT || passone) 2883 continue; 2884 bp->b_flags |= B_WANTED; 2885 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2886 "nfsfsync", slptimeo); 2887 splx(s); 2888 if (error) { 2889 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) { 2890 error = EINTR; 2891 goto done; 2892 } 2893 if (slpflag == PCATCH) { 2894 slpflag = 0; 2895 slptimeo = 2 * hz; 2896 } 2897 } 2898 goto loop; 2899 } 2900 if ((bp->b_flags & B_DELWRI) == 0) 2901 panic("nfs_fsync: not dirty"); 2902 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2903 continue; 2904 bremfree(bp); 2905 if (passone || !commit) 2906 bp->b_flags |= (B_BUSY|B_ASYNC); 2907 else 2908 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2909 splx(s); 2910 VOP_BWRITE(bp); 2911 goto loop; 2912 } 2913 splx(s); 2914 if (passone) { 2915 passone = 0; 2916 goto again; 2917 } 2918 if (waitfor == MNT_WAIT) { 2919 while (vp->v_numoutput) { 2920 vp->v_flag |= VBWAIT; 2921 error = tsleep((caddr_t)&vp->v_numoutput, 2922 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); 2923 if (error) { 2924 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) { 2925 error = EINTR; 2926 goto done; 2927 } 2928 if (slpflag == PCATCH) { 2929 slpflag = 0; 2930 slptimeo = 2 * hz; 2931 } 2932 } 2933 } 2934 if (vp->v_dirtyblkhd.lh_first && commit) { 2935 goto loop; 2936 } 2937 } 2938 if (np->n_flag & NWRITEERR) { 2939 error = np->n_error; 2940 np->n_flag &= ~NWRITEERR; 2941 } 2942done: 2943 if (bvec != NULL && bvec != bvec_on_stack) 2944 free(bvec, M_TEMP); 2945 return (error); 2946} 2947 2948/* 2949 * NFS advisory byte-level locks. 2950 * Currently unsupported. 2951 */ 2952static int 2953nfs_advlock(ap) 2954 struct vop_advlock_args /* { 2955 struct vnode *a_vp; 2956 caddr_t a_id; 2957 int a_op; 2958 struct flock *a_fl; 2959 int a_flags; 2960 } */ *ap; 2961{ 2962 register struct nfsnode *np = VTONFS(ap->a_vp); 2963 2964 /* 2965 * The following kludge is to allow diskless support to work 2966 * until a real NFS lockd is implemented. Basically, just pretend 2967 * that this is a local lock. 2968 */ 2969 return (lf_advlock(ap, &(np->n_lockf), np->n_size)); 2970} 2971 2972/* 2973 * Print out the contents of an nfsnode. 2974 */ 2975static int 2976nfs_print(ap) 2977 struct vop_print_args /* { 2978 struct vnode *a_vp; 2979 } */ *ap; 2980{ 2981 register struct vnode *vp = ap->a_vp; 2982 register struct nfsnode *np = VTONFS(vp); 2983 2984 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 2985 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 2986 if (vp->v_type == VFIFO) 2987 fifo_printinfo(vp); 2988 printf("\n"); 2989 return (0); 2990} 2991 2992/* 2993 * Just call nfs_writebp() with the force argument set to 1. 2994 */ 2995static int 2996nfs_bwrite(ap) 2997 struct vop_bwrite_args /* { 2998 struct vnode *a_bp; 2999 } */ *ap; 3000{ 3001 3002 return (nfs_writebp(ap->a_bp, 1)); 3003} 3004 3005/* 3006 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless 3007 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 3008 */ 3009int 3010nfs_writebp(bp, force) 3011 register struct buf *bp; 3012 int force; 3013{ 3014 int s; 3015 register int oldflags = bp->b_flags, retv = 1; 3016 off_t off; 3017 3018 if(!(bp->b_flags & B_BUSY)) 3019 panic("bwrite: buffer is not busy???"); 3020 3021 if (bp->b_flags & B_INVAL) 3022 bp->b_flags |= B_INVAL | B_NOCACHE; 3023 3024 if (bp->b_flags & B_DELWRI) { 3025 --numdirtybuffers; 3026 if (needsbuffer) 3027 vfs_bio_need_satisfy(); 3028 } 3029 s = splbio(); /* XXX check if needed */ 3030 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 3031 3032 if ((oldflags & (B_ASYNC|B_DELWRI)) == (B_ASYNC|B_DELWRI)) { 3033 reassignbuf(bp, bp->b_vp); 3034 } 3035 3036 bp->b_vp->v_numoutput++; 3037 curproc->p_stats->p_ru.ru_oublock++; 3038 splx(s); 3039 3040 /* 3041 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 3042 * an actual write will have to be scheduled via. VOP_STRATEGY(). 3043 * If B_WRITEINPROG is already set, then push it with a write anyhow. 3044 */ 3045 vfs_busy_pages(bp, 1); 3046 if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) { 3047 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 3048 bp->b_flags |= B_WRITEINPROG; 3049 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 3050 bp->b_wcred, bp->b_proc); 3051 bp->b_flags &= ~B_WRITEINPROG; 3052 if (!retv) { 3053 bp->b_dirtyoff = bp->b_dirtyend = 0; 3054 bp->b_flags &= ~B_NEEDCOMMIT; 3055 biodone(bp); 3056 } else if (retv == NFSERR_STALEWRITEVERF) 3057 nfs_clearcommit(bp->b_vp->v_mount); 3058 } 3059 if (retv) { 3060 if (force) 3061 bp->b_flags |= B_WRITEINPROG; 3062 VOP_STRATEGY(bp); 3063 } 3064 3065 if( (oldflags & B_ASYNC) == 0) { 3066 int rtval = biowait(bp); 3067 3068 if (oldflags & B_DELWRI) { 3069 s = splbio(); 3070 reassignbuf(bp, bp->b_vp); 3071 splx(s); 3072 } 3073 3074 brelse(bp); 3075 return (rtval); 3076 } 3077 3078 return (0); 3079} 3080 3081/* 3082 * nfs special file access vnode op. 3083 * Essentially just get vattr and then imitate iaccess() since the device is 3084 * local to the client. 3085 */ 3086static int 3087nfsspec_access(ap) 3088 struct vop_access_args /* { 3089 struct vnode *a_vp; 3090 int a_mode; 3091 struct ucred *a_cred; 3092 struct proc *a_p; 3093 } */ *ap; 3094{ 3095 register struct vattr *vap; 3096 register gid_t *gp; 3097 register struct ucred *cred = ap->a_cred; 3098 struct vnode *vp = ap->a_vp; 3099 mode_t mode = ap->a_mode; 3100 struct vattr vattr; 3101 register int i; 3102 int error; 3103 3104 /* 3105 * Disallow write attempts on filesystems mounted read-only; 3106 * unless the file is a socket, fifo, or a block or character 3107 * device resident on the filesystem. 3108 */ 3109 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3110 switch (vp->v_type) { 3111 case VREG: 3112 case VDIR: 3113 case VLNK: 3114 return (EROFS); 3115 default: 3116 break; 3117 } 3118 } 3119 /* 3120 * If you're the super-user, 3121 * you always get access. 3122 */ 3123 if (cred->cr_uid == 0) 3124 return (0); 3125 vap = &vattr; 3126 error = VOP_GETATTR(vp, vap, cred, ap->a_p); 3127 if (error) 3128 return (error); 3129 /* 3130 * Access check is based on only one of owner, group, public. 3131 * If not owner, then check group. If not a member of the 3132 * group, then check public access. 3133 */ 3134 if (cred->cr_uid != vap->va_uid) { 3135 mode >>= 3; 3136 gp = cred->cr_groups; 3137 for (i = 0; i < cred->cr_ngroups; i++, gp++) 3138 if (vap->va_gid == *gp) 3139 goto found; 3140 mode >>= 3; 3141found: 3142 ; 3143 } 3144 error = (vap->va_mode & mode) == mode ? 0 : EACCES; 3145 return (error); 3146} 3147 3148/* 3149 * Read wrapper for special devices. 3150 */ 3151static int 3152nfsspec_read(ap) 3153 struct vop_read_args /* { 3154 struct vnode *a_vp; 3155 struct uio *a_uio; 3156 int a_ioflag; 3157 struct ucred *a_cred; 3158 } */ *ap; 3159{ 3160 register struct nfsnode *np = VTONFS(ap->a_vp); 3161 3162 /* 3163 * Set access flag. 3164 */ 3165 np->n_flag |= NACC; 3166 getnanotime(&np->n_atim); 3167 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3168} 3169 3170/* 3171 * Write wrapper for special devices. 3172 */ 3173static int 3174nfsspec_write(ap) 3175 struct vop_write_args /* { 3176 struct vnode *a_vp; 3177 struct uio *a_uio; 3178 int a_ioflag; 3179 struct ucred *a_cred; 3180 } */ *ap; 3181{ 3182 register struct nfsnode *np = VTONFS(ap->a_vp); 3183 3184 /* 3185 * Set update flag. 3186 */ 3187 np->n_flag |= NUPD; 3188 getnanotime(&np->n_mtim); 3189 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3190} 3191 3192/* 3193 * Close wrapper for special devices. 3194 * 3195 * Update the times on the nfsnode then do device close. 3196 */ 3197static int 3198nfsspec_close(ap) 3199 struct vop_close_args /* { 3200 struct vnode *a_vp; 3201 int a_fflag; 3202 struct ucred *a_cred; 3203 struct proc *a_p; 3204 } */ *ap; 3205{ 3206 register struct vnode *vp = ap->a_vp; 3207 register struct nfsnode *np = VTONFS(vp); 3208 struct vattr vattr; 3209 3210 if (np->n_flag & (NACC | NUPD)) { 3211 np->n_flag |= NCHG; 3212 if (vp->v_usecount == 1 && 3213 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3214 VATTR_NULL(&vattr); 3215 if (np->n_flag & NACC) 3216 vattr.va_atime = np->n_atim; 3217 if (np->n_flag & NUPD) 3218 vattr.va_mtime = np->n_mtim; 3219 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3220 } 3221 } 3222 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3223} 3224 3225/* 3226 * Read wrapper for fifos. 3227 */ 3228static int 3229nfsfifo_read(ap) 3230 struct vop_read_args /* { 3231 struct vnode *a_vp; 3232 struct uio *a_uio; 3233 int a_ioflag; 3234 struct ucred *a_cred; 3235 } */ *ap; 3236{ 3237 register struct nfsnode *np = VTONFS(ap->a_vp); 3238 3239 /* 3240 * Set access flag. 3241 */ 3242 np->n_flag |= NACC; 3243 getnanotime(&np->n_atim); 3244 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3245} 3246 3247/* 3248 * Write wrapper for fifos. 3249 */ 3250static int 3251nfsfifo_write(ap) 3252 struct vop_write_args /* { 3253 struct vnode *a_vp; 3254 struct uio *a_uio; 3255 int a_ioflag; 3256 struct ucred *a_cred; 3257 } */ *ap; 3258{ 3259 register struct nfsnode *np = VTONFS(ap->a_vp); 3260 3261 /* 3262 * Set update flag. 3263 */ 3264 np->n_flag |= NUPD; 3265 getnanotime(&np->n_mtim); 3266 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3267} 3268 3269/* 3270 * Close wrapper for fifos. 3271 * 3272 * Update the times on the nfsnode then do fifo close. 3273 */ 3274static int 3275nfsfifo_close(ap) 3276 struct vop_close_args /* { 3277 struct vnode *a_vp; 3278 int a_fflag; 3279 struct ucred *a_cred; 3280 struct proc *a_p; 3281 } */ *ap; 3282{ 3283 register struct vnode *vp = ap->a_vp; 3284 register struct nfsnode *np = VTONFS(vp); 3285 struct vattr vattr; 3286 struct timespec ts; 3287 3288 if (np->n_flag & (NACC | NUPD)) { 3289 getnanotime(&ts); 3290 if (np->n_flag & NACC) 3291 np->n_atim = ts; 3292 if (np->n_flag & NUPD) 3293 np->n_mtim = ts; 3294 np->n_flag |= NCHG; 3295 if (vp->v_usecount == 1 && 3296 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3297 VATTR_NULL(&vattr); 3298 if (np->n_flag & NACC) 3299 vattr.va_atime = np->n_atim; 3300 if (np->n_flag & NUPD) 3301 vattr.va_mtime = np->n_mtim; 3302 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3303 } 3304 } 3305 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3306} 3307