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sys/nfs4client/nfs4_vnops.c
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1 /* $Id: nfs_vnops.c,v 1.45 2003/11/05 14:59:02 rees Exp $ */ 2 3 /*- 4 * copyright (c) 2003 5 * the regents of the university of michigan 6 * all rights reserved 7 * 8 * permission is granted to use, copy, create derivative works and redistribute 9 * this software and such derivative works for any purpose, so long as the name 10 * of the university of michigan is not used in any advertising or publicity 11 * pertaining to the use or distribution of this software without specific, 12 * written prior authorization. if the above copyright notice or any other 13 * identification of the university of michigan is included in any copy of any 14 * portion of this software, then the disclaimer below must also be included. 15 * 16 * this software is provided as is, without representation from the university 17 * of michigan as to its fitness for any purpose, and without warranty by the 18 * university of michigan of any kind, either express or implied, including 19 * without limitation the implied warranties of merchantability and fitness for 20 * a particular purpose. the regents of the university of michigan shall not be 21 * liable for any damages, including special, indirect, incidental, or 22 * consequential damages, with respect to any claim arising out of or in 23 * connection with the use of the software, even if it has been or is hereafter 24 * advised of the possibility of such damages. 25 */ 26 27 /* 28 * Copyright (c) 1989, 1993 29 * The Regents of the University of California. All rights reserved. 30 * 31 * This code is derived from software contributed to Berkeley by 32 * Rick Macklem at The University of Guelph. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 4. Neither the name of the University nor the names of its contributors 43 * may be used to endorse or promote products derived from this software 44 * without specific prior written permission. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 * 58 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 59 */ 60 61 #include <sys/cdefs.h> 62 __FBSDID("$FreeBSD$"); 63 64 /* 65 * vnode op calls for Sun NFS version 2 and 3 66 */ 67 68 #include "opt_inet.h" 69 70 #include <sys/param.h> 71 #include <sys/kernel.h> 72 #include <sys/systm.h> 73 #include <sys/resourcevar.h> 74 #include <sys/proc.h> 75 #include <sys/mount.h> 76 #include <sys/bio.h> 77 #include <sys/buf.h> 78 #include <sys/malloc.h> 79 #include <sys/mbuf.h> 80 #include <sys/namei.h> 81 #include <sys/socket.h> 82 #include <sys/vnode.h> 83 #include <sys/dirent.h> 84 #include <sys/fcntl.h> 85 #include <sys/lockf.h> 86 #include <sys/stat.h> 87 #include <sys/sysctl.h> 88 #include <sys/lockmgr.h> 89 #include <sys/signalvar.h> 90 91 #include <vm/vm.h> 92 #include <vm/vm_extern.h> 93 94 #include <fs/fifofs/fifo.h> 95 96 #include <rpc/rpcclnt.h> 97 98 #include <nfs/rpcv2.h> 99 #include <nfs/nfsproto.h> 100 #include <nfsclient/nfs.h> 101 #include <nfs4client/nfs4.h> 102 #include <nfsclient/nfsnode.h> 103 #include <nfsclient/nfsmount.h> 104 #include <nfsclient/nfs_lock.h> 105 #include <nfs/xdr_subs.h> 106 #include <nfsclient/nfsm_subs.h> 107 108 #include <net/if.h> 109 #include <netinet/in.h> 110 #include <netinet/in_var.h> 111 112 /* NFSv4 */ 113 #include <nfs4client/nfs4m_subs.h> 114 #include <nfs4client/nfs4_vn.h> 115 116 /* Defs */ 117 #define TRUE 1 118 #define FALSE 0 119 120 /* 121 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these 122 * calls are not in getblk() and brelse() so that they would not be necessary 123 * here. 124 */ 125 #ifndef B_VMIO 126 #define vfs_busy_pages(bp, f) 127 #endif 128 129 static int nfs4_flush(struct vnode *, int, struct thread *, 130 int); 131 static int nfs4_setattrrpc(struct vnode *, struct vattr *, struct ucred *, 132 struct thread *); 133 static int nfs4_closerpc(struct vnode *, struct ucred *, struct thread *, int); 134 135 static vop_lookup_t nfs4_lookup; 136 static vop_create_t nfs4_create; 137 static vop_mknod_t nfs4_mknod; 138 static vop_open_t nfs4_open; 139 static vop_close_t nfs4_close; 140 static vop_access_t nfs4_access; 141 static vop_getattr_t nfs4_getattr; 142 static vop_setattr_t nfs4_setattr; 143 static vop_read_t nfs4_read; 144 static vop_fsync_t nfs4_fsync; 145 static vop_remove_t nfs4_remove; 146 static vop_link_t nfs4_link; 147 static vop_rename_t nfs4_rename; 148 static vop_mkdir_t nfs4_mkdir; 149 static vop_rmdir_t nfs4_rmdir; 150 static vop_symlink_t nfs4_symlink; 151 static vop_readdir_t nfs4_readdir; 152 static vop_strategy_t nfs4_strategy; 153 static int nfs4_lookitup(struct vnode *, const char *, int, 154 struct ucred *, struct thread *, struct nfsnode **); 155 static int nfs4_sillyrename(struct vnode *, struct vnode *, 156 struct componentname *); 157 static vop_readlink_t nfs4_readlink; 158 static vop_print_t nfs4_print; 159 static vop_advlock_t nfs4_advlock; 160 161 /* 162 * Global vfs data structures for nfs 163 */ 164 struct vop_vector nfs4_vnodeops = { 165 .vop_default = &default_vnodeops, 166 .vop_access = nfs4_access, 167 .vop_advlock = nfs4_advlock, 168 .vop_close = nfs4_close, 169 .vop_create = nfs4_create, 170 .vop_fsync = nfs4_fsync, 171 .vop_getattr = nfs4_getattr, 172 .vop_getpages = nfs_getpages, 173 .vop_putpages = nfs_putpages, 174 .vop_inactive = nfs_inactive, 175 .vop_lease = VOP_NULL, 176 .vop_link = nfs4_link, 177 .vop_lookup = nfs4_lookup, 178 .vop_mkdir = nfs4_mkdir, 179 .vop_mknod = nfs4_mknod, 180 .vop_open = nfs4_open, 181 .vop_print = nfs4_print, 182 .vop_read = nfs4_read, 183 .vop_readdir = nfs4_readdir, 184 .vop_readlink = nfs4_readlink, 185 .vop_reclaim = nfs_reclaim, 186 .vop_remove = nfs4_remove, 187 .vop_rename = nfs4_rename, 188 .vop_rmdir = nfs4_rmdir, 189 .vop_setattr = nfs4_setattr, 190 .vop_strategy = nfs4_strategy, 191 .vop_symlink = nfs4_symlink, 192 .vop_write = nfs_write, 193 }; 194 195 static int nfs4_removerpc(struct vnode *dvp, const char *name, int namelen, 196 struct ucred *cred, struct thread *td); 197 static int nfs4_renamerpc(struct vnode *fdvp, const char *fnameptr, 198 int fnamelen, struct vnode *tdvp, 199 const char *tnameptr, int tnamelen, 200 struct ucred *cred, struct thread *td); 201 static int nfs4_renameit(struct vnode *sdvp, struct componentname *scnp, 202 struct sillyrename *sp); 203 static int nfs4_openrpc(struct vnode *, struct vnode **, 204 struct componentname *, int, struct vattr *); 205 static int nfs4_open_confirm(struct vnode *vp, struct nfs4_compound *cpp, 206 struct nfs4_oparg_open *openap, 207 struct nfs4_oparg_getfh *gfh, 208 struct ucred *cred, struct thread *td); 209 static int nfs4_createrpc(struct vnode *, struct vnode **, 210 struct componentname *, nfstype, 211 struct vattr *, char *); 212 213 /* 214 * Global variables 215 */ 216 struct nfs4_lowner nfs4_masterlowner; 217 218 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 219 220 SYSCTL_DECL(_vfs_nfs4); 221 222 static int nfs4_access_cache_timeout = NFS_MAXATTRTIMO; 223 SYSCTL_INT(_vfs_nfs4, OID_AUTO, access_cache_timeout, CTLFLAG_RW, 224 &nfs4_access_cache_timeout, 0, "NFS ACCESS cache timeout"); 225 226 #if 0 227 static int nfsv3_commit_on_close = 0; 228 SYSCTL_INT(_vfs_nfs4, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW, 229 &nfsv3_commit_on_close, 0, "write+commit on close, else only write"); 230 231 SYSCTL_INT(_vfs_nfs4, OID_AUTO, access_cache_hits, CTLFLAG_RD, 232 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count"); 233 234 SYSCTL_INT(_vfs_nfs4, OID_AUTO, access_cache_misses, CTLFLAG_RD, 235 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count"); 236 #endif 237 238 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \ 239 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \ 240 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP) 241 static int 242 nfs4_v3_access_otw(struct vnode *vp, int wmode, struct thread *td, 243 struct ucred *cred) 244 { 245 const int v3 = 1; 246 u_int32_t *tl; 247 int error = 0, attrflag; 248 249 return (0); 250 251 struct mbuf *mreq, *mrep = NULL, *md, *mb; 252 caddr_t bpos, dpos; 253 u_int32_t rmode; 254 struct nfsnode *np = VTONFS(vp); 255 256 nfsstats.rpccnt[NFSPROC_ACCESS]++; 257 mreq = nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 258 mb = mreq; 259 bpos = mtod(mb, caddr_t); 260 nfsm_fhtom(vp, v3); 261 tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED); 262 *tl = txdr_unsigned(wmode); 263 nfsm_request(vp, NFSPROC_ACCESS, td, cred); 264 nfsm_postop_attr(vp, attrflag); 265 if (!error) { 266 tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); 267 rmode = fxdr_unsigned(u_int32_t, *tl); 268 np->n_mode = rmode; 269 np->n_modeuid = cred->cr_uid; 270 np->n_modestamp = time_second; 271 } 272 m_freem(mrep); 273 nfsmout: 274 return error; 275 } 276 277 /* 278 * nfs access vnode op. 279 * For nfs version 2, just return ok. File accesses may fail later. 280 * For nfs version 3, use the access rpc to check accessibility. If file modes 281 * are changed on the server, accesses might still fail later. 282 */ 283 static int 284 nfs4_access(struct vop_access_args *ap) 285 { 286 struct vnode *vp = ap->a_vp; 287 int error = 0; 288 u_int32_t mode, wmode; 289 int v3 = NFS_ISV3(vp); /* v3 \in v4 */ 290 struct nfsnode *np = VTONFS(vp); 291 caddr_t bpos, dpos; 292 struct mbuf *mreq, *mrep = NULL, *md, *mb; 293 struct nfs4_compound cp; 294 struct nfs4_oparg_access acc; 295 struct thread *td = ap->a_td; 296 struct ucred *cred = ap->a_cred; 297 298 /* 299 * Disallow write attempts on filesystems mounted read-only; 300 * unless the file is a socket, fifo, or a block or character 301 * device resident on the filesystem. 302 */ 303 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 304 switch (vp->v_type) { 305 case VREG: 306 case VDIR: 307 case VLNK: 308 return (EROFS); 309 default: 310 break; 311 } 312 } 313 /* 314 * For nfs v3, check to see if we have done this recently, and if 315 * so return our cached result instead of making an ACCESS call. 316 * If not, do an access rpc, otherwise you are stuck emulating 317 * ufs_access() locally using the vattr. This may not be correct, 318 * since the server may apply other access criteria such as 319 * client uid-->server uid mapping that we do not know about. 320 */ 321 /* XXX Disable this for now; needs fixing of _access_otw() */ 322 if (0 && v3) { 323 if (ap->a_mode & VREAD) 324 mode = NFSV3ACCESS_READ; 325 else 326 mode = 0; 327 if (vp->v_type != VDIR) { 328 if (ap->a_mode & VWRITE) 329 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 330 if (ap->a_mode & VEXEC) 331 mode |= NFSV3ACCESS_EXECUTE; 332 } else { 333 if (ap->a_mode & VWRITE) 334 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 335 NFSV3ACCESS_DELETE); 336 if (ap->a_mode & VEXEC) 337 mode |= NFSV3ACCESS_LOOKUP; 338 } 339 /* XXX safety belt, only make blanket request if caching */ 340 if (nfs4_access_cache_timeout > 0) { 341 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY | 342 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE | 343 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP; 344 } else { 345 wmode = mode; 346 } 347 348 /* 349 * Does our cached result allow us to give a definite yes to 350 * this request? 351 */ 352 if (time_second < np->n_modestamp + nfs4_access_cache_timeout && 353 ap->a_cred->cr_uid == np->n_modeuid && 354 (np->n_mode & mode) == mode) { 355 nfsstats.accesscache_hits++; 356 } else { 357 /* 358 * Either a no, or a don't know. Go to the wire. 359 */ 360 nfsstats.accesscache_misses++; 361 error = nfs4_v3_access_otw(vp, wmode, ap->a_td, 362 ap->a_cred); 363 if (error == 0) { 364 if ((np->n_mode & mode) != mode) 365 error = EACCES; 366 } 367 } 368 return (error); 369 } 370 371 /* XXX use generic access code here? */ 372 mode = ap->a_mode & VREAD ? NFSV4ACCESS_READ : 0; 373 if (vp->v_type == VDIR) { 374 if (ap->a_mode & VWRITE) 375 mode |= NFSV4ACCESS_MODIFY | NFSV4ACCESS_EXTEND | NFSV4ACCESS_DELETE; 376 if (ap->a_mode & VEXEC) 377 mode |= NFSV4ACCESS_LOOKUP; 378 } else { 379 if (ap->a_mode & VWRITE) 380 mode |= NFSV4ACCESS_MODIFY | NFSV4ACCESS_EXTEND; 381 if (ap->a_mode & VEXEC) 382 mode |= NFSV4ACCESS_EXECUTE; 383 } 384 385 nfs_v4initcompound(&cp); 386 acc.mode = mode; 387 388 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 389 mb = mreq; 390 bpos = mtod(mb, caddr_t); 391 392 nfsm_v4build_compound(&cp, "nfs4_access()"); 393 nfsm_v4build_putfh(&cp, vp); 394 nfsm_v4build_access(&cp, &acc); 395 nfsm_v4build_finalize(&cp); 396 397 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred); 398 if (error != 0) 399 goto nfsmout; 400 401 nfsm_v4dissect_compound(&cp); 402 nfsm_v4dissect_putfh(&cp); 403 nfsm_v4dissect_access(&cp, &acc); 404 405 if ((acc.rmode & mode) != mode) 406 error = EACCES; 407 408 nfsmout: 409 error = nfs_v4postop(&cp, error); 410 411 if (mrep != NULL) 412 m_freem(mrep); 413 414 return (error); 415 } 416 417 static int 418 nfs4_openrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 419 int flags, struct vattr *vap) 420 { 421 struct vnode *vp = *vpp; 422 struct nfs4_oparg_getattr getattr; 423 struct nfs4_oparg_getfh getfh; 424 struct nfs4_oparg_open opena; 425 struct nfs4_compound cp; 426 caddr_t bpos, dpos; 427 int error = 0; 428 struct mbuf *mreq, *mrep = NULL, *md, *mb; 429 struct ucred *cred = cnp->cn_cred; 430 struct thread *td = cnp->cn_thread; 431 struct nfs4_fctx xfc, *fcp; 432 struct nfsnode *np; 433 434 if (vp == NULL) { 435 /* Create a new file */ 436 np = NULL; 437 fcp = &xfc; 438 bzero(fcp, sizeof(*fcp)); 439 } else { 440 np = VTONFS(vp); 441 fcp = flags & FWRITE ? &np->n_wfc : &np->n_rfc; 442 } 443 444 /* 445 * Since we are currently only one lockowner; we only open the 446 * file once each for reading and writing. 447 */ 448 if (fcp->refcnt++ != 0) { 449 *vpp = vp; 450 /*printf("not opening %s\n", np->n_name != NULL ? np->n_name : "");*/ 451 return (0); 452 } 453 454 fcp->lop = &nfs4_masterlowner; 455 fcp->np = np; 456 457 nfs_v4initcompound(&cp); 458 cp.nmp = VFSTONFS(dvp->v_mount); 459 460 opena.ctype = NCLNULL; 461 opena.flags = flags; 462 opena.vap = vap; 463 opena.fcp = fcp; /* For lockowner */ 464 opena.cnp = cnp; 465 466 getattr.bm = &nfsv4_getattrbm; 467 468 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 469 mb = mreq; 470 bpos = mtod(mb, caddr_t); 471 472 nfsm_v4build_compound(&cp, "nfs4_openrpc()"); 473 nfsm_v4build_putfh(&cp, dvp); 474 nfsm_v4build_open(&cp, &opena); 475 nfsm_v4build_getattr(&cp, &getattr); 476 nfsm_v4build_getfh(&cp, &getfh); 477 nfsm_v4build_finalize(&cp); 478 479 nfsm_request(vp != NULL ? vp : dvp, NFSV4PROC_COMPOUND, td, cred); 480 if (error != 0) 481 goto nfsmout; 482 483 nfsm_v4dissect_compound(&cp); 484 nfsm_v4dissect_putfh(&cp); 485 nfsm_v4dissect_open(&cp, &opena); 486 nfsm_v4dissect_getattr(&cp, &getattr); 487 nfsm_v4dissect_getfh(&cp, &getfh); 488 489 error = nfs_v4postop(&cp, error); 490 491 if (opena.rflags & NFSV4OPENRES_CONFIRM) { 492 error = nfs4_open_confirm(vp ? vp : dvp, &cp, &opena, &getfh, cred, td); 493 if (error != 0) 494 goto nfsmout; 495 } 496 497 if (vp == NULL) { 498 /* New file */ 499 error = nfs_nget(dvp->v_mount, &getfh.fh_val, 500 getfh.fh_len, &np, LK_EXCLUSIVE); 501 if (error != 0) 502 goto nfsmout; 503 504 vp = NFSTOV(np); 505 np->n_dvp = dvp; 506 np->n_namelen = cnp->cn_namelen; /* XXX memory leaks on these; track! */ 507 if (np->n_name != NULL) 508 FREE(np->n_name, M_NFSREQ); 509 MALLOC(np->n_name, u_char *, np->n_namelen + 1, M_NFSREQ, M_WAITOK); 510 bcopy(cnp->cn_nameptr, np->n_name, np->n_namelen); 511 np->n_name[np->n_namelen] = '\0'; 512 if (flags & FWRITE) 513 np->n_wfc = *fcp; 514 else 515 np->n_rfc = *fcp; 516 517 /*printf("opened new file %s\n", np->n_name);*/ 518 519 nfs4_vnop_loadattrcache(vp, &getattr.fa, NULL); 520 *vpp = vp; 521 } else { 522 /*printf("openend \"old\" %s\n", np->n_name != NULL ? np->n_name : "");*/ 523 524 if (flags & O_TRUNC && np->n_size != 0) { 525 struct vattr va; 526 527 VATTR_NULL(&va); 528 va.va_size = 0; 529 error = nfs4_setattrrpc(vp, &va, 530 cnp->cn_cred, cnp->cn_thread); 531 } 532 np->n_attrstamp = 0; 533 } 534 535 nfsmout: 536 if (mrep != NULL) 537 m_freem(mrep); 538 539 return (error); 540 } 541 542 static int 543 nfs4_open_confirm(struct vnode *vp, struct nfs4_compound *cpp, 544 struct nfs4_oparg_open *openap, struct nfs4_oparg_getfh *gfh, 545 struct ucred *cred, struct thread *td) 546 { 547 caddr_t bpos, dpos; 548 int error = 0; 549 struct mbuf *mreq, *mrep = NULL, *md, *mb; 550 551 nfs_v4initcompound(cpp); 552 cpp->nmp = VFSTONFS(vp->v_mount); 553 554 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 555 mb = mreq; 556 bpos = mtod(mb, caddr_t); 557 558 nfsm_v4build_compound(cpp, "nfs4_open_confirm()"); 559 nfsm_v4build_putfh_nv(cpp, gfh); 560 nfsm_v4build_open_confirm(cpp, openap); 561 nfsm_v4build_finalize(cpp); 562 563 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred); 564 if (error != 0) 565 goto nfsmout; 566 567 nfsm_v4dissect_compound(cpp); 568 nfsm_v4dissect_putfh(cpp); 569 nfsm_v4dissect_open_confirm(cpp, openap); 570 571 nfsmout: 572 error = nfs_v4postop(cpp, error); 573 574 if (mrep != NULL) 575 m_freem(mrep); 576 577 return (error); 578 } 579 580 581 /* 582 * nfs open vnode op 583 * Check to see if the type is ok 584 * and that deletion is not in progress. 585 * For paged in text files, you will need to flush the page cache 586 * if consistency is lost. 587 */ 588 /* ARGSUSED */ 589 static int 590 nfs4_open(struct vop_open_args *ap) 591 { 592 struct vnode *vp = ap->a_vp; 593 struct nfsnode *np = VTONFS(vp); 594 enum vtype vtype = vp->v_type; 595 int mode = ap->a_mode; 596 struct componentname cn; 597 598 if (vtype != VREG) { 599 if (vtype != VDIR && vtype != VLNK) { 600 #ifdef DIAGNOSTIC 601 printf("open eacces vtyp=%d\n", vp->v_type); 602 #endif 603 return (EACCES); 604 } else 605 return (0); 606 } 607 608 if (np->n_flag & NCREATED) { 609 np->n_flag &= ~NCREATED; 610 return (0); 611 } 612 613 cn.cn_nameptr = np->n_name; 614 cn.cn_namelen = np->n_namelen; 615 cn.cn_cred = ap->a_cred; 616 cn.cn_thread = ap->a_td; 617 618 return (nfs4_openrpc(np->n_dvp, &vp, &cn, mode, NULL)); 619 } 620 621 static int 622 nfs4_closerpc(struct vnode *vp, struct ucred *cred, struct thread *td, int flags) 623 { 624 caddr_t bpos, dpos; 625 int error = 0; 626 struct mbuf *mreq, *mrep = NULL, *md, *mb; 627 struct nfs4_fctx *fcp; 628 struct nfs4_compound cp; 629 struct nfsnode *np = VTONFS(vp); 630 631 fcp = flags & FWRITE ? &np->n_wfc : &np->n_rfc; 632 633 nfs_v4initcompound(&cp); 634 635 if (--fcp->refcnt != 0) 636 return (0); 637 638 /*printf("closing %s\n", np->n_name != NULL ? np->n_name : "");*/ 639 640 cp.fcp = fcp; 641 642 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 643 mb = mreq; 644 bpos = mtod(mb, caddr_t); 645 646 nfsm_v4build_compound(&cp, "nfs4_closerpc()"); 647 nfsm_v4build_putfh(&cp, vp); 648 nfsm_v4build_close(&cp, fcp); 649 nfsm_v4build_finalize(&cp); 650 651 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred); 652 if (error != 0) 653 goto nfsmout; 654 655 nfsm_v4dissect_compound(&cp); 656 nfsm_v4dissect_putfh(&cp); 657 nfsm_v4dissect_close(&cp, fcp); 658 659 nfsmout: 660 error = nfs_v4postop(&cp, error); 661 662 if (mrep != NULL) 663 m_freem(mrep); 664 665 return (error); 666 } 667 668 /* 669 * nfs close vnode op 670 * play it safe for now (see comments in v2/v3 nfs_close regarding dirty buffers) 671 */ 672 /* ARGSUSED */ 673 static int 674 nfs4_close(struct vop_close_args *ap) 675 { 676 struct vnode *vp = ap->a_vp; 677 struct nfsnode *np = VTONFS(vp); 678 int error = 0; 679 680 if (vp->v_type != VREG) 681 return (0); 682 683 if (np->n_flag & NMODIFIED) { 684 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 685 np->n_attrstamp = 0; 686 } 687 688 error = nfs4_closerpc(vp, ap->a_cred, ap->a_td, ap->a_fflag); 689 690 if (!error && np->n_flag & NWRITEERR) { 691 np->n_flag &= ~NWRITEERR; 692 error = np->n_error; 693 } 694 return (error); 695 } 696 697 /* 698 * nfs getattr call from vfs. 699 */ 700 static int 701 nfs4_getattr(struct vop_getattr_args *ap) 702 { 703 struct vnode *vp = ap->a_vp; 704 struct nfsnode *np = VTONFS(vp); 705 caddr_t bpos, dpos; 706 int error = 0; 707 struct mbuf *mreq, *mrep = NULL, *md, *mb; 708 struct nfs4_oparg_getattr ga; 709 struct nfs4_compound cp; 710 711 /* 712 * Update local times for special files. 713 */ 714 if (np->n_flag & (NACC | NUPD)) 715 np->n_flag |= NCHG; 716 /* 717 * First look in the cache. 718 */ 719 if (nfs_getattrcache(vp, ap->a_vap) == 0) 720 return (0); 721 722 nfsstats.rpccnt[NFSPROC_GETATTR]++; 723 724 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1)); 725 mb = mreq; 726 bpos = mtod(mb, caddr_t); 727 728 ga.bm = &nfsv4_getattrbm; 729 nfs_v4initcompound(&cp); 730 731 nfsm_v4build_compound(&cp, "nfs4_getattr()"); 732 nfsm_v4build_putfh(&cp, vp); 733 nfsm_v4build_getattr(&cp, &ga); 734 nfsm_v4build_finalize(&cp); 735 736 nfsm_request(vp, NFSV4PROC_COMPOUND, ap->a_td, ap->a_cred); 737 if (error != 0) 738 goto nfsmout; 739 740 nfsm_v4dissect_compound(&cp); 741 nfsm_v4dissect_putfh(&cp); 742 nfsm_v4dissect_getattr(&cp, &ga); 743 744 nfs4_vnop_loadattrcache(vp, &ga.fa, ap->a_vap); 745 746 nfsmout: 747 error = nfs_v4postop(&cp, error); 748 749 if (mrep != NULL) 750 m_freem(mrep); 751 return (error); 752 } 753 754 /* 755 * nfs setattr call. 756 */ 757 static int 758 nfs4_setattr(struct vop_setattr_args *ap) 759 { 760 struct vnode *vp = ap->a_vp; 761 struct nfsnode *np = VTONFS(vp); 762 struct vattr *vap = ap->a_vap; 763 int error = 0; 764 u_quad_t tsize; 765 766 #ifndef nolint 767 tsize = (u_quad_t)0; 768 #endif 769 770 /* 771 * Setting of flags is not supported. 772 */ 773 if (vap->va_flags != VNOVAL) 774 return (EOPNOTSUPP); 775 776 /* 777 * Disallow write attempts if the filesystem is mounted read-only. 778 */ 779 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 780 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 781 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 782 (vp->v_mount->mnt_flag & MNT_RDONLY)) 783 return (EROFS); 784 if (vap->va_size != VNOVAL) { 785 switch (vp->v_type) { 786 case VDIR: 787 return (EISDIR); 788 case VCHR: 789 case VBLK: 790 case VSOCK: 791 case VFIFO: 792 if (vap->va_mtime.tv_sec == VNOVAL && 793 vap->va_atime.tv_sec == VNOVAL && 794 vap->va_mode == (mode_t)VNOVAL && 795 vap->va_uid == (uid_t)VNOVAL && 796 vap->va_gid == (gid_t)VNOVAL) 797 return (0); 798 vap->va_size = VNOVAL; 799 break; 800 default: 801 /* 802 * Disallow write attempts if the filesystem is 803 * mounted read-only. 804 */ 805 if (vp->v_mount->mnt_flag & MNT_RDONLY) 806 return (EROFS); 807 808 /* 809 * We run vnode_pager_setsize() early (why?), 810 * we must set np->n_size now to avoid vinvalbuf 811 * V_SAVE races that might setsize a lower 812 * value. 813 */ 814 815 tsize = np->n_size; 816 error = nfs_meta_setsize(vp, ap->a_cred, 817 ap->a_td, vap->va_size); 818 819 if (np->n_flag & NMODIFIED) { 820 if (vap->va_size == 0) 821 error = nfs_vinvalbuf(vp, 0, ap->a_td, 1); 822 else 823 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 824 if (error) { 825 vnode_pager_setsize(vp, np->n_size); 826 return (error); 827 } 828 } 829 /* 830 * np->n_size has already been set to vap->va_size 831 * in nfs_meta_setsize(). We must set it again since 832 * nfs_loadattrcache() could be called through 833 * nfs_meta_setsize() and could modify np->n_size. 834 */ 835 np->n_vattr.va_size = np->n_size = vap->va_size; 836 }; 837 } else if ((vap->va_mtime.tv_sec != VNOVAL || 838 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) && 839 vp->v_type == VREG && 840 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) == EINTR) 841 return (error); 842 843 if (vap->va_size != VNOVAL && np->n_wfc.refcnt == 0) { 844 /* Have to open the file before we can truncate it */ 845 struct componentname cn; 846 847 cn.cn_nameptr = np->n_name; 848 cn.cn_namelen = np->n_namelen; 849 cn.cn_cred = ap->a_cred; 850 cn.cn_thread = ap->a_td; 851 error = nfs4_openrpc(np->n_dvp, &vp, &cn, FWRITE, NULL); 852 if (error) 853 return error; 854 np->n_flag |= NTRUNCATE; 855 } 856 857 error = nfs4_setattrrpc(vp, vap, ap->a_cred, ap->a_td); 858 if (error && vap->va_size != VNOVAL) { 859 np->n_size = np->n_vattr.va_size = tsize; 860 vnode_pager_setsize(vp, np->n_size); 861 } 862 return (error); 863 } 864 865 /* 866 * Do an nfs setattr rpc. 867 */ 868 static int 869 nfs4_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred, 870 struct thread *td) 871 { 872 caddr_t bpos, dpos; 873 int error = 0; 874 struct mbuf *mreq, *mrep = NULL, *md, *mb; 875 struct nfs4_compound cp; 876 struct nfs4_oparg_getattr ga; 877 struct nfsnode *np = VTONFS(vp); 878 struct nfs4_fctx *fcp; 879 880 nfsstats.rpccnt[NFSPROC_SETATTR]++; 881 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 882 mb = mreq; 883 bpos = mtod(mb, caddr_t); 884 885 ga.bm = &nfsv4_getattrbm; 886 fcp = (vap->va_size != VNOVAL) ? &np->n_wfc : NULL; 887 nfs_v4initcompound(&cp); 888 889 nfsm_v4build_compound(&cp, "nfs4_setattrrpc"); 890 nfsm_v4build_putfh(&cp, vp); 891 nfsm_v4build_setattr(&cp, vap, fcp); 892 nfsm_v4build_getattr(&cp, &ga); 893 nfsm_v4build_finalize(&cp); 894 895 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred); 896 if (error != 0) 897 goto nfsmout; 898 899 nfsm_v4dissect_compound(&cp); 900 nfsm_v4dissect_putfh(&cp); 901 nfsm_v4dissect_setattr(&cp); 902 nfsm_v4dissect_getattr(&cp, &ga); 903 904 nfs4_vnop_loadattrcache(vp, &ga.fa, NULL); 905 906 /* TODO: do the settatr and close in a single compound rpc */ 907 if (np->n_flag & NTRUNCATE) { 908 error = nfs4_closerpc(vp, cred, td, FWRITE); 909 np->n_flag &= ~NTRUNCATE; 910 } 911 912 nfsmout: 913 error = nfs_v4postop(&cp, error); 914 915 if (mrep != NULL) 916 m_freem(mrep); 917 918 return (error); 919 } 920 921 /* 922 * nfs lookup call, one step at a time... 923 * First look in cache 924 * If not found, unlock the directory nfsnode and do the rpc 925 */ 926 static int 927 nfs4_lookup(struct vop_lookup_args *ap) 928 { 929 struct componentname *cnp = ap->a_cnp; 930 struct vnode *dvp = ap->a_dvp; 931 struct vnode **vpp = ap->a_vpp; 932 int isdot, flags = cnp->cn_flags; 933 struct vnode *newvp; 934 struct nfsmount *nmp; 935 caddr_t bpos, dpos; 936 struct mbuf *mreq, *mrep = NULL, *md, *mb; 937 long len; 938 nfsfh_t *fhp; 939 struct nfsnode *np; 940 int error = 0, fhsize; 941 struct thread *td = cnp->cn_thread; 942 struct nfs4_compound cp; 943 struct nfs4_oparg_getattr ga, dga; 944 struct nfs4_oparg_lookup l; 945 struct nfs4_oparg_getfh gfh; 946 947 *vpp = NULLVP; 948 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 949 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 950 return (EROFS); 951 if (dvp->v_type != VDIR) 952 return (ENOTDIR); 953 nmp = VFSTONFS(dvp->v_mount); 954 np = VTONFS(dvp); 955 956 isdot = cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.'; 957 958 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) { 959 *vpp = NULLVP; 960 return (error); 961 } 962 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { 963 struct vattr vattr; 964 965 newvp = *vpp; 966 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, td) 967 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 968 nfsstats.lookupcache_hits++; 969 if (cnp->cn_nameiop != LOOKUP && 970 (flags & ISLASTCN)) 971 cnp->cn_flags |= SAVENAME; 972 return (0); 973 } 974 cache_purge(newvp); 975 if (newvp != dvp) 976 vput(newvp); 977 else 978 vrele(newvp); 979 } 980 981 error = 0; 982 newvp = NULLVP; 983 nfsstats.lookupcache_misses++; 984 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 985 986 len = cnp->cn_namelen; 987 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, 0); 988 mb = mreq; 989 bpos = mtod(mb, caddr_t); 990 991 ga.bm = &nfsv4_getattrbm; 992 dga.bm = &nfsv4_getattrbm; 993 nfs_v4initcompound(&cp); 994 995 nfsm_v4build_compound(&cp, "nfs4_lookup()"); 996 nfsm_v4build_putfh(&cp, dvp); 997 nfsm_v4build_getattr(&cp, &dga); 998 if (flags & ISDOTDOT) 999 nfsm_v4build_lookupp(&cp); 1000 else if (!isdot) { 1001 l.name = cnp->cn_nameptr; 1002 l.namelen = len; 1003 nfsm_v4build_lookup(&cp, &l); 1004 } 1005 nfsm_v4build_getattr(&cp, &ga); 1006 nfsm_v4build_getfh(&cp, &gfh); 1007 nfsm_v4build_finalize(&cp); 1008 1009 nfsm_request(dvp, NFSV4PROC_COMPOUND, cnp->cn_thread, cnp->cn_cred); 1010 if (error != 0) 1011 goto nfsmout; 1012 1013 nfsm_v4dissect_compound(&cp); 1014 nfsm_v4dissect_putfh(&cp); 1015 nfsm_v4dissect_getattr(&cp, &dga); 1016 if (flags & ISDOTDOT) 1017 nfsm_v4dissect_lookupp(&cp); 1018 else if (!isdot) 1019 nfsm_v4dissect_lookup(&cp); 1020 nfsm_v4dissect_getattr(&cp, &ga); 1021 nfsm_v4dissect_getfh(&cp, &gfh); 1022 1023 nfs4_vnop_loadattrcache(dvp, &dga.fa, NULL); 1024 fhp = &gfh.fh_val; 1025 fhsize = gfh.fh_len; 1026 1027 /* 1028 * Handle RENAME case... 1029 */ 1030 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { 1031 if (NFS_CMPFH(np, fhp, fhsize)) 1032 return (EISDIR); 1033 1034 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, LK_EXCLUSIVE); 1035 if (error) 1036 return (error); 1037 1038 newvp = NFSTOV(np); 1039 1040 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL); 1041 1042 *vpp = newvp; 1043 cnp->cn_flags |= SAVENAME; 1044 return (0); 1045 } 1046 1047 if (flags & ISDOTDOT) { 1048 VOP_UNLOCK(dvp, 0, td); 1049 1050 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, LK_EXCLUSIVE); 1051 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 1052 if (error) 1053 return (error); 1054 newvp = NFSTOV(np); 1055 1056 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL); 1057 } else if (NFS_CMPFH(np, fhp, fhsize)) { 1058 VREF(dvp); 1059 newvp = dvp; 1060 } else { 1061 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, LK_EXCLUSIVE); 1062 if (error) 1063 return (error); 1064 newvp = NFSTOV(np); 1065 1066 /* Fill in np used by open. */ 1067 np->n_dvp = dvp; 1068 np->n_namelen = cnp->cn_namelen; 1069 if (np->n_name != NULL) 1070 FREE(np->n_name, M_NFSREQ); 1071 MALLOC(np->n_name, u_char *, np->n_namelen + 1, M_NFSREQ, M_WAITOK); 1072 bcopy(cnp->cn_nameptr, np->n_name, np->n_namelen); 1073 np->n_name[np->n_namelen] = '\0'; 1074 1075 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL); 1076 } 1077 1078 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1079 cnp->cn_flags |= SAVENAME; 1080 if ((cnp->cn_flags & MAKEENTRY) && 1081 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1082 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 1083 cache_enter(dvp, newvp, cnp); 1084 } 1085 *vpp = newvp; 1086 m_freem(mrep); 1087 nfsmout: 1088 error = nfs_v4postop(&cp, error); 1089 1090 if (error) { 1091 if (newvp != NULLVP) { 1092 vrele(newvp); 1093 *vpp = NULLVP; 1094 } 1095 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1096 (flags & ISLASTCN) && error == ENOENT) { 1097 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1098 error = EROFS; 1099 else 1100 error = EJUSTRETURN; 1101 } 1102 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1103 cnp->cn_flags |= SAVENAME; 1104 } 1105 1106 return (error); 1107 } 1108 1109 /* 1110 * nfs read call. 1111 * Just call nfs_bioread() to do the work. 1112 */ 1113 static int 1114 nfs4_read(struct vop_read_args *ap) 1115 { 1116 struct vnode *vp = ap->a_vp; 1117 1118 switch (vp->v_type) { 1119 case VREG: 1120 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 1121 case VDIR: 1122 return (EISDIR); 1123 default: 1124 return (EOPNOTSUPP); 1125 } 1126 } 1127 1128 /* 1129 * nfs readlink call 1130 */ 1131 static int 1132 nfs4_readlink(struct vop_readlink_args *ap) 1133 { 1134 struct vnode *vp = ap->a_vp; 1135 1136 if (vp->v_type != VLNK) 1137 return (EINVAL); 1138 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); 1139 } 1140 1141 /* 1142 * Do a readlink rpc. 1143 * Called by nfs_doio() from below the buffer cache. 1144 */ 1145 int 1146 nfs4_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1147 { 1148 caddr_t bpos, dpos; 1149 int error = 0; 1150 struct mbuf *mreq, *mrep = NULL, *md, *mb; 1151 struct nfs4_compound cp; 1152 1153 nfsstats.rpccnt[NFSPROC_READLINK]++; 1154 1155 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 1156 mb = mreq; 1157 bpos = mtod(mb, caddr_t); 1158 1159 nfs_v4initcompound(&cp); 1160 1161 nfsm_v4build_compound(&cp, "nfs4_readlinkrpc()"); 1162 nfsm_v4build_putfh(&cp, vp); 1163 nfsm_v4build_readlink(&cp); 1164 nfsm_v4build_finalize(&cp); 1165 1166 nfsm_request(vp, NFSV4PROC_COMPOUND, uiop->uio_td, cred); 1167 if (error != 0) 1168 goto nfsmout; 1169 1170 nfsm_v4dissect_compound(&cp); 1171 nfsm_v4dissect_putfh(&cp); 1172 nfsm_v4dissect_readlink(&cp, uiop); 1173 1174 nfsmout: 1175 error = nfs_v4postop(&cp, error); 1176 1177 if (mrep != NULL) 1178 m_freem(mrep); 1179 return (error); 1180 } 1181 1182 /* 1183 * nfs read rpc call 1184 * Ditto above 1185 */ 1186 int 1187 nfs4_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1188 { 1189 caddr_t bpos, dpos; 1190 struct mbuf *mreq, *mrep = NULL, *md, *mb; 1191 struct nfsmount *nmp; 1192 int error = 0, len, tsiz; 1193 struct nfs4_compound cp; 1194 struct nfs4_oparg_read read; 1195 struct nfsnode *np = VTONFS(vp); 1196 1197 nmp = VFSTONFS(vp->v_mount); 1198 tsiz = uiop->uio_resid; 1199 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1200 return (EFBIG); 1201 1202 if (tsiz == 0) 1203 return (0); 1204 1205 read.uiop = uiop; 1206 read.fcp = np->n_rfc.refcnt > 0 ? &np->n_rfc : &np->n_wfc; 1207 1208 while (tsiz > 0) { 1209 nfsstats.rpccnt[NFSPROC_READ]++; 1210 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1211 1212 read.off = uiop->uio_offset; 1213 read.maxcnt = len; 1214 nfs_v4initcompound(&cp); 1215 1216 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 1217 mb = mreq; 1218 bpos = mtod(mb, caddr_t); 1219 1220 nfsm_v4build_compound(&cp, "nfs4_readrpc()"); 1221 nfsm_v4build_putfh(&cp, vp); 1222 nfsm_v4build_read(&cp, &read); 1223 nfsm_v4build_finalize(&cp); 1224 1225 nfsm_request(vp, NFSV4PROC_COMPOUND, uiop->uio_td, cred); 1226 if (error != 0) { 1227 error = nfs_v4postop(&cp, error); 1228 goto nfsmout; 1229 } 1230 1231 nfsm_v4dissect_compound(&cp); 1232 nfsm_v4dissect_putfh(&cp); 1233 nfsm_v4dissect_read(&cp, &read); 1234 1235 if (read.eof || read.retlen == 0) 1236 tsiz = 0; 1237 else 1238 tsiz -= read.retlen; 1239 1240 error = nfs_v4postop(&cp, error); 1241 1242 m_freem(mrep); 1243 mrep = NULL; 1244 } 1245 nfsmout: 1246 if (mrep != NULL) 1247 m_freem(mrep); 1248 1249 return (error); 1250 } 1251 1252 /* 1253 * nfs write call 1254 */ 1255 int 1256 nfs4_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 1257 int *iomode, int *must_commit) 1258 { 1259 int32_t backup; 1260 caddr_t bpos, dpos; 1261 struct mbuf *mreq, *mrep = NULL, *md, *mb; 1262 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1263 int error = 0, len, tsiz, wccflag = 1, rlen; 1264 struct nfs4_compound cp; 1265 struct nfs4_oparg_write write; 1266 nfsv4stablehow commit, committed = NSHFILESYNC; 1267 caddr_t verf; 1268 struct nfsnode *np = VTONFS(vp); 1269 1270 #ifndef DIAGNOSTIC 1271 if (uiop->uio_iovcnt != 1) 1272 panic("nfs: writerpc iovcnt > 1"); 1273 #endif 1274 *must_commit = 0; 1275 tsiz = uiop->uio_resid; 1276 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1277 return (EFBIG); 1278 1279 if (tsiz == 0) 1280 return (0); 1281 1282 write.stable = (nfsv4stablehow)*iomode; 1283 write.uiop = uiop; 1284 write.fcp = &np->n_wfc; 1285 1286 while (tsiz > 0) { 1287 nfsstats.rpccnt[NFSPROC_WRITE]++; 1288 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1289 1290 write.off = uiop->uio_offset; 1291 write.cnt = len; 1292 nfs_v4initcompound(&cp); 1293 1294 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 1295 mb = mreq; 1296 bpos = mtod(mb, caddr_t); 1297 1298 nfsm_v4build_compound(&cp, "nfs4_writerpc()"); 1299 nfsm_v4build_putfh(&cp, vp); 1300 nfsm_v4build_write(&cp, &write); 1301 nfsm_v4build_finalize(&cp); 1302 1303 nfsm_request(vp, NFSV4PROC_COMPOUND, uiop->uio_td, cred); 1304 if (error != 0) { 1305 error = nfs_v4postop(&cp, error); 1306 goto nfsmout; 1307 } 1308 1309 nfsm_v4dissect_compound(&cp); 1310 nfsm_v4dissect_putfh(&cp); 1311 nfsm_v4dissect_write(&cp, &write); 1312 1313 rlen = write.retlen; 1314 if (rlen == 0) { 1315 error = NFSERR_IO; 1316 break; 1317 } else if (rlen < len) { 1318 backup = len - rlen; 1319 uiop->uio_iov->iov_base = 1320 (char *)uiop->uio_iov->iov_base - backup; 1321 uiop->uio_iov->iov_len += backup; 1322 uiop->uio_offset -= backup; 1323 uiop->uio_resid += backup; 1324 len = rlen; 1325 } 1326 1327 commit = write.committed; 1328 1329 if (committed == NSHFILESYNC || 1330 (committed = NSHDATASYNC && commit == NSHUNSTABLE)) 1331 committed = commit; 1332 1333 verf = (caddr_t)write.wverf; 1334 1335 if ((nmp->nm_flag & NFSSTA_HASWRITEVERF) == 0) { 1336 bcopy(verf, nmp->nm_verf, NFSX_V4VERF); 1337 nmp->nm_flag |= NFSMNT_HASWRITEVERF; 1338 } else if (bcmp(verf, nmp->nm_verf, NFSX_V4VERF)) { 1339 *must_commit = 1; 1340 bcopy(verf, nmp->nm_verf, NFSX_V4VERF); 1341 } 1342 1343 /* XXX wccflag */ 1344 if (wccflag) 1345 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime; 1346 1347 error = nfs_v4postop(&cp, error); 1348 1349 m_freem(mrep); 1350 mrep = NULL; 1351 if (error) 1352 break; 1353 tsiz -= len; 1354 } 1355 nfsmout: 1356 if (mrep != NULL) 1357 m_freem(mrep); 1358 *iomode = committed; 1359 if (error) 1360 uiop->uio_resid = tsiz; 1361 return (error); 1362 } 1363 1364 /* ARGSUSED */ 1365 static int 1366 nfs4_mknod(struct vop_mknod_args *ap) 1367 { 1368 struct vattr *vap = ap->a_vap; 1369 struct vnode *newvp = NULL; 1370 int error; 1371 1372 error = nfs4_createrpc(ap->a_dvp, &newvp, 1373 ap->a_cnp, (nfstype)vap->va_type, vap, NULL); 1374 1375 /* XXX - is this actually referenced here? */ 1376 if (error == 0) { 1377 *ap->a_vpp = newvp; 1378 vrele(newvp); 1379 } 1380 1381 return (error); 1382 } 1383 1384 static int 1385 nfs4_createrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 1386 nfstype ftype, struct vattr *vap, char *linktarget) 1387 { 1388 struct nfsnode *dnp = VTONFS(dvp); 1389 struct nfsnode *np = NULL; 1390 struct vnode *newvp = NULL; 1391 struct nfs4_compound cp; 1392 struct nfs4_oparg_create c; 1393 struct nfs4_oparg_getattr ga; 1394 struct nfs4_oparg_getfh gfh; 1395 caddr_t bpos, dpos; 1396 struct mbuf *mreq, *mrep = NULL, *md, *mb; 1397 int error = 0; 1398 1399 nfsstats.rpccnt[NFSPROC_CREATE]++; 1400 1401 mreq = nfsm_reqhead(dvp, NFSV4PROC_COMPOUND, 0); 1402 mb = mreq; 1403 bpos = mtod(mb, caddr_t); 1404 1405 bzero(&c, sizeof(c)); 1406 bzero(&ga, sizeof(ga)); 1407 1408 c.type = ftype; 1409 c.vap = vap; 1410 c.linktext = linktarget; 1411 c.name = cnp->cn_nameptr; 1412 c.namelen = cnp->cn_namelen; 1413 1414 ga.bm = &nfsv4_getattrbm; 1415 nfs_v4initcompound(&cp); 1416 1417 nfsm_v4build_compound(&cp, "nfs4_createrpc()"); 1418 nfsm_v4build_putfh(&cp, dvp); 1419 nfsm_v4build_create(&cp, &c); 1420 nfsm_v4build_getattr(&cp, &ga); 1421 nfsm_v4build_getfh(&cp, &gfh); 1422 nfsm_v4build_finalize(&cp); 1423 1424 nfsm_request(dvp, NFSV4PROC_COMPOUND, cnp->cn_thread, cnp->cn_cred); 1425 if (error != 0) 1426 goto nfsmout; 1427 1428 nfsm_v4dissect_compound(&cp); 1429 nfsm_v4dissect_putfh(&cp); 1430 nfsm_v4dissect_create(&cp, &c); 1431 nfsm_v4dissect_getattr(&cp, &ga); 1432 nfsm_v4dissect_getfh(&cp, &gfh); 1433 1434 error = nfs_nget(dvp->v_mount, &gfh.fh_val, gfh.fh_len, &np, LK_EXCLUSIVE); 1435 if (error != 0) 1436 goto nfsmout; 1437 1438 newvp = NFSTOV(np); 1439 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL); 1440 1441 if (cnp->cn_flags & MAKEENTRY) 1442 cache_enter(dvp, newvp, cnp); 1443 1444 dnp->n_flag |= NMODIFIED; 1445 dnp->n_attrstamp = 0; 1446 1447 nfsmout: 1448 error = nfs_v4postop(&cp, error); 1449 1450 if (mrep != NULL) 1451 m_freem(mrep); 1452 1453 /* XXX */ 1454 /*FREE(cnp->cn_pnbuf, M_NAMEI);*/ 1455 if (error != 0 && newvp != NULL) 1456 vput(newvp); 1457 else if (error == 0) 1458 *vpp = newvp; 1459 1460 return (error); 1461 } 1462 1463 static int 1464 nfs4_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, 1465 struct vnode *tdvp, const char *tnameptr, int tnamelen, 1466 struct ucred *cred, struct thread *td) 1467 { 1468 1469 struct nfsnode *fnp = VTONFS(fdvp), *tnp = VTONFS(tdvp); 1470 caddr_t bpos, dpos; 1471 struct mbuf *mreq, *mrep = NULL, *md, *mb; 1472 struct nfs4_compound cp; 1473 struct nfs4_oparg_rename r; 1474 int error = 0; 1475 1476 nfsstats.rpccnt[NFSPROC_RENAME]++; 1477 1478 r.fname = fnameptr; 1479 r.fnamelen = fnamelen; 1480 r.tname = tnameptr; 1481 r.tnamelen = tnamelen; 1482 nfs_v4initcompound(&cp); 1483 1484 mreq = nfsm_reqhead(fdvp, NFSV4PROC_COMPOUND, 0); 1485 mb = mreq; 1486 bpos = mtod(mb, caddr_t); 1487 1488 nfsm_v4build_compound(&cp, "nfs4_renamerpc()"); 1489 nfsm_v4build_putfh(&cp, fdvp); 1490 nfsm_v4build_savefh(&cp); 1491 nfsm_v4build_putfh(&cp, tdvp); 1492 nfsm_v4build_rename(&cp, &r); 1493 nfsm_v4build_finalize(&cp); 1494 1495 nfsm_request(fdvp, NFSV4PROC_COMPOUND, td, cred); 1496 if (error != 0) 1497 goto nfsmout; 1498 1499 nfsm_v4dissect_compound(&cp); 1500 nfsm_v4dissect_putfh(&cp); 1501 nfsm_v4dissect_savefh(&cp); 1502 nfsm_v4dissect_putfh(&cp); 1503 nfsm_v4dissect_rename(&cp); 1504 1505 /* XXX should this always be performed? */ 1506 fnp->n_flag |= NMODIFIED; 1507 tnp->n_flag |= NMODIFIED; 1508 fnp->n_attrstamp = tnp->n_attrstamp = 0; 1509 1510 nfsmout: 1511 error = nfs_v4postop(&cp, error); 1512 1513 if (mrep != NULL) 1514 m_freem(mrep); 1515 1516 return (error); 1517 } 1518 1519 /* 1520 * nfs file create call 1521 */ 1522 static int 1523 nfs4_create(struct vop_create_args *ap) 1524 { 1525 struct vnode *dvp = ap->a_dvp; 1526 struct vattr *vap = ap->a_vap; 1527 struct nfsnode *dnp = VTONFS(dvp); 1528 struct componentname *cnp = ap->a_cnp; 1529 struct vnode *newvp = NULL; 1530 int error = 0, fmode = (O_CREAT | FREAD | FWRITE); 1531 struct vattr vattr; 1532 1533 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_thread)) != 0) 1534 return (error); 1535 1536 if (vap->va_vaflags & VA_EXCLUSIVE) 1537 fmode |= O_EXCL; 1538 1539 error = nfs4_openrpc(dvp, &newvp, cnp, fmode, vap); 1540 if (error != 0) 1541 goto out; 1542 1543 VTONFS(newvp)->n_flag |= NCREATED; 1544 1545 if (cnp->cn_flags & MAKEENTRY) 1546 cache_enter(dvp, newvp, cnp); 1547 1548 *ap->a_vpp = newvp; 1549 1550 dnp->n_flag |= NMODIFIED; 1551 dnp->n_attrstamp = 0; /* XXX; wccflag */ 1552 1553 out: 1554 return (error); 1555 } 1556 1557 /* 1558 * nfs file remove call 1559 * To try and make nfs semantics closer to ufs semantics, a file that has 1560 * other processes using the vnode is renamed instead of removed and then 1561 * removed later on the last close. 1562 * - If v_usecount > 1 1563 * If a rename is not already in the works 1564 * call nfs4_sillyrename() to set it up 1565 * else 1566 * do the remove rpc 1567 */ 1568 static int 1569 nfs4_remove(struct vop_remove_args *ap) 1570 { 1571 struct vnode *vp = ap->a_vp; 1572 struct vnode *dvp = ap->a_dvp; 1573 struct componentname *cnp = ap->a_cnp; 1574 struct nfsnode *np = VTONFS(vp); 1575 int error = 0; 1576 struct vattr vattr; 1577 1578 #ifndef DIAGNOSTIC 1579 if ((cnp->cn_flags & HASBUF) == 0) 1580 panic("nfs4_remove: no name"); 1581 if (vrefcnt(vp) < 1) 1582 panic("nfs4_remove: bad v_usecount"); 1583 #endif 1584 if (vp->v_type == VDIR) 1585 error = EPERM; 1586 else if (vrefcnt(vp) == 1 || (np->n_sillyrename && 1587 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_thread) == 0 && 1588 vattr.va_nlink > 1)) { 1589 /* 1590 * Purge the name cache so that the chance of a lookup for 1591 * the name succeeding while the remove is in progress is 1592 * minimized. Without node locking it can still happen, such 1593 * that an I/O op returns ESTALE, but since you get this if 1594 * another host removes the file.. 1595 */ 1596 cache_purge(vp); 1597 /* 1598 * throw away biocache buffers, mainly to avoid 1599 * unnecessary delayed writes later. 1600 */ 1601 error = nfs_vinvalbuf(vp, 0, cnp->cn_thread, 1); 1602 /* Do the rpc */ 1603 if (error != EINTR) 1604 error = nfs4_removerpc(dvp, cnp->cn_nameptr, 1605 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread); 1606 /* 1607 * Kludge City: If the first reply to the remove rpc is lost.. 1608 * the reply to the retransmitted request will be ENOENT 1609 * since the file was in fact removed 1610 * Therefore, we cheat and return success. 1611 */ 1612 if (error == ENOENT) 1613 error = 0; 1614 } else if (!np->n_sillyrename) 1615 error = nfs4_sillyrename(dvp, vp, cnp); 1616 np->n_attrstamp = 0; 1617 return (error); 1618 } 1619 1620 /* 1621 * nfs file remove rpc called from nfs_inactive 1622 */ 1623 int 1624 nfs4_removeit(struct sillyrename *sp) 1625 { 1626 /* 1627 * Make sure that the directory vnode is still valid. 1628 * XXX we should lock sp->s_dvp here. 1629 */ 1630 if (sp->s_dvp->v_type == VBAD) 1631 return (0); 1632 return (nfs4_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1633 NULL)); 1634 } 1635 1636 /* 1637 * Nfs remove rpc, called from nfs4_remove() and nfs4_removeit(). 1638 */ 1639 static int 1640 nfs4_removerpc(struct vnode *dvp, const char *name, int namelen, 1641 struct ucred *cred, struct thread *td) 1642 { 1643 caddr_t bpos, dpos; 1644 int error = 0; 1645 struct mbuf *mreq, *mrep = NULL, *md, *mb; 1646 struct nfs4_compound cp; 1647 1648 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1649 1650 mreq = nfsm_reqhead(dvp, NFSV4PROC_COMPOUND, 0); 1651 mb = mreq; 1652 bpos = mtod(mb, caddr_t); 1653 1654 nfs_v4initcompound(&cp); 1655 1656 nfsm_v4build_compound(&cp, "nfs4_removerpc()"); 1657 nfsm_v4build_putfh(&cp, dvp); 1658 nfsm_v4build_remove(&cp, name, namelen); 1659 nfsm_v4build_finalize(&cp); 1660 1661 nfsm_request(dvp, NFSV4PROC_COMPOUND, td, cred); 1662 if (error != 0) 1663 goto nfsmout; 1664 1665 nfsm_v4dissect_compound(&cp); 1666 nfsm_v4dissect_putfh(&cp); 1667 nfsm_v4dissect_remove(&cp); 1668 1669 nfsmout: 1670 error = nfs_v4postop(&cp, error); 1671 1672 if (mrep != NULL) 1673 m_freem(mrep); 1674 1675 VTONFS(dvp)->n_flag |= NMODIFIED; 1676 VTONFS(dvp)->n_attrstamp = 0; /* XXX wccflag */ 1677 1678 return (error); 1679 } 1680 1681 /* 1682 * nfs file rename call 1683 */ 1684 static int 1685 nfs4_rename(struct vop_rename_args *ap) 1686 { 1687 struct vnode *fvp = ap->a_fvp; 1688 struct vnode *tvp = ap->a_tvp; 1689 struct vnode *fdvp = ap->a_fdvp; 1690 struct vnode *tdvp = ap->a_tdvp; 1691 struct componentname *tcnp = ap->a_tcnp; 1692 struct componentname *fcnp = ap->a_fcnp; 1693 int error; 1694 1695 #ifndef DIAGNOSTIC 1696 if ((tcnp->cn_flags & HASBUF) == 0 || 1697 (fcnp->cn_flags & HASBUF) == 0) 1698 panic("nfs4_rename: no name"); 1699 #endif 1700 /* Check for cross-device rename */ 1701 if ((fvp->v_mount != tdvp->v_mount) || 1702 (tvp && (fvp->v_mount != tvp->v_mount))) { 1703 error = EXDEV; 1704 goto out; 1705 } 1706 1707 if (fvp == tvp) { 1708 printf("nfs4_rename: fvp == tvp (can't happen)\n"); 1709 error = 0; 1710 goto out; 1711 } 1712 if ((error = vn_lock(fvp, LK_EXCLUSIVE, fcnp->cn_thread)) != 0) 1713 goto out; 1714 1715 /* 1716 * We have to flush B_DELWRI data prior to renaming 1717 * the file. If we don't, the delayed-write buffers 1718 * can be flushed out later after the file has gone stale 1719 * under NFSV3. NFSV2 does not have this problem because 1720 * ( as far as I can tell ) it flushes dirty buffers more 1721 * often. 1722 */ 1723 VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread); 1724 VOP_UNLOCK(fvp, 0, fcnp->cn_thread); 1725 if (tvp) 1726 VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread); 1727 1728 /* 1729 * If the tvp exists and is in use, sillyrename it before doing the 1730 * rename of the new file over it. 1731 * XXX Can't sillyrename a directory. 1732 */ 1733 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename && 1734 tvp->v_type != VDIR && !nfs4_sillyrename(tdvp, tvp, tcnp)) { 1735 vput(tvp); 1736 tvp = NULL; 1737 } 1738 1739 error = nfs4_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1740 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1741 tcnp->cn_thread); 1742 1743 if (fvp->v_type == VDIR) { 1744 if (tvp != NULL && tvp->v_type == VDIR) 1745 cache_purge(tdvp); 1746 cache_purge(fdvp); 1747 } 1748 1749 out: 1750 if (tdvp == tvp) 1751 vrele(tdvp); 1752 else 1753 vput(tdvp); 1754 if (tvp) 1755 vput(tvp); 1756 vrele(fdvp); 1757 vrele(fvp); 1758 /* 1759 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1760 */ 1761 if (error == ENOENT) 1762 error = 0; 1763 return (error); 1764 } 1765 1766 /* 1767 * nfs file rename rpc called from nfs4_remove() above 1768 */ 1769 static int 1770 nfs4_renameit(struct vnode *sdvp, struct componentname *scnp, 1771 struct sillyrename *sp) 1772 { 1773 return (nfs4_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, sdvp, 1774 sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_thread)); 1775 } 1776 1777 /* 1778 * nfs hard link create call 1779 */ 1780 static int 1781 nfs4_link(struct vop_link_args *ap) 1782 { 1783 struct vnode *vp = ap->a_vp; 1784 struct vnode *tdvp = ap->a_tdvp; 1785 struct componentname *cnp = ap->a_cnp; 1786 caddr_t bpos, dpos; 1787 int error = 0; 1788 struct mbuf *mreq, *mrep = NULL, *md, *mb; 1789 struct nfs4_compound cp; 1790 struct nfs4_oparg_link l; 1791 1792 if (vp->v_mount != tdvp->v_mount) { 1793 return (EXDEV); 1794 } 1795 1796 /* 1797 * Push all writes to the server, so that the attribute cache 1798 * doesn't get "out of sync" with the server. 1799 * XXX There should be a better way! 1800 */ 1801 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread); 1802 1803 nfsstats.rpccnt[NFSPROC_LINK]++; 1804 1805 l.name = cnp->cn_nameptr; 1806 l.namelen = cnp->cn_namelen; 1807 nfs_v4initcompound(&cp); 1808 1809 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 1810 mb = mreq; 1811 bpos = mtod(mb, caddr_t); 1812 1813 nfsm_v4build_compound(&cp, "nfs4_link()"); 1814 nfsm_v4build_putfh(&cp, vp); 1815 nfsm_v4build_savefh(&cp); 1816 nfsm_v4build_putfh(&cp, tdvp); 1817 nfsm_v4build_link(&cp, &l); 1818 nfsm_v4build_finalize(&cp); 1819 1820 nfsm_request(vp, NFSV4PROC_COMPOUND, cnp->cn_thread, cnp->cn_cred); 1821 if (error != 0) 1822 goto nfsmout; 1823 1824 nfsm_v4dissect_compound(&cp); 1825 nfsm_v4dissect_putfh(&cp); 1826 nfsm_v4dissect_savefh(&cp); 1827 nfsm_v4dissect_putfh(&cp); 1828 nfsm_v4dissect_link(&cp); 1829 1830 VTONFS(tdvp)->n_flag |= NMODIFIED; 1831 VTONFS(vp)->n_attrstamp = 0; 1832 VTONFS(tdvp)->n_attrstamp = 0; 1833 1834 nfsmout: 1835 error = nfs_v4postop(&cp, error); 1836 1837 if (mrep != NULL) 1838 m_freem(mrep); 1839 1840 return (error); 1841 } 1842 1843 /* 1844 * nfs symbolic link create call 1845 */ 1846 static int 1847 nfs4_symlink(struct vop_symlink_args *ap) 1848 { 1849 struct vnode *dvp = ap->a_dvp; 1850 int error = 0; 1851 struct vnode *newvp = NULL; 1852 1853 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1854 1855 error = nfs4_createrpc(ap->a_dvp, &newvp, ap->a_cnp, NFLNK, 1856 ap->a_vap, ap->a_target); 1857 1858 if (error != 0 && newvp != NULL) 1859 vput(newvp); 1860 else if (error == 0) 1861 *ap->a_vpp = newvp; 1862 1863 VTONFS(dvp)->n_flag |= NMODIFIED; 1864 VTONFS(dvp)->n_attrstamp = 0; /* XXX wccflags */ 1865 1866 return (error); 1867 } 1868 1869 /* 1870 * nfs make dir call 1871 */ 1872 static int 1873 nfs4_mkdir(struct vop_mkdir_args *ap) 1874 { 1875 return (nfs4_createrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, NFDIR, 1876 ap->a_vap, NULL)); 1877 } 1878 1879 /* 1880 * nfs remove directory call 1881 */ 1882 static int 1883 nfs4_rmdir(struct vop_rmdir_args *ap) 1884 { 1885 struct vnode *vp = ap->a_vp; 1886 struct vnode *dvp = ap->a_dvp; 1887 struct nfsnode *dnp = VTONFS(dvp); 1888 struct componentname *cnp = ap->a_cnp; 1889 int error = 0; 1890 1891 if (dvp == vp) 1892 return (EINVAL); 1893 1894 error = (nfs4_removerpc(dvp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_cred, 1895 NULL)); 1896 if (error) 1897 return (error); 1898 1899 dnp->n_flag |= NMODIFIED; 1900 dnp->n_attrstamp = 0; 1901 cache_purge(dvp); 1902 cache_purge(vp); 1903 1904 return (error); 1905 } 1906 1907 /* 1908 * nfs readdir call 1909 */ 1910 static int 1911 nfs4_readdir(struct vop_readdir_args *ap) 1912 { 1913 struct vnode *vp = ap->a_vp; 1914 struct nfsnode *np = VTONFS(vp); 1915 struct uio *uio = ap->a_uio; 1916 int tresid, error; 1917 struct vattr vattr; 1918 1919 if (vp->v_type != VDIR) 1920 return (EPERM); 1921 /* 1922 * First, check for hit on the EOF offset cache 1923 */ 1924 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 1925 (np->n_flag & NMODIFIED) == 0) { 1926 if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_td) == 0 && 1927 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { 1928 nfsstats.direofcache_hits++; 1929 return (0); 1930 } 1931 } 1932 1933 /* 1934 * Call nfs_bioread() to do the real work. 1935 */ 1936 tresid = uio->uio_resid; 1937 error = nfs_bioread(vp, uio, 0, ap->a_cred); 1938 1939 if (!error && uio->uio_resid == tresid) 1940 nfsstats.direofcache_misses++; 1941 return (error); 1942 } 1943 1944 static u_char fty_to_dty[] = { 1945 DT_UNKNOWN, /* NFNON */ 1946 DT_REG, /* NFREG */ 1947 DT_DIR, /* NFDIR */ 1948 DT_BLK, /* NFBLK */ 1949 DT_CHR, /* NFCHR */ 1950 DT_LNK, /* NFLNK */ 1951 DT_SOCK, /* NFSOCK */ 1952 DT_FIFO, /* NFFIFO */ 1953 DT_UNKNOWN, /* NFATTRDIT */ 1954 DT_UNKNOWN, /* NFNAMEDATTR */ 1955 DT_UNKNOWN, /* NFBAD */ 1956 }; 1957 1958 /* 1959 * Readdir rpc call. 1960 * Called from below the buffer cache by nfs_doio(). 1961 */ 1962 int 1963 nfs4_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1964 { 1965 int len, left; 1966 struct dirent *dp = NULL; 1967 u_int32_t *tl; 1968 caddr_t p; 1969 uint64_t *cookiep; 1970 caddr_t bpos, dpos; 1971 struct mbuf *mreq, *mrep = NULL, *md, *mb; 1972 uint64_t cookie; 1973 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1974 struct nfsnode *dnp = VTONFS(vp); 1975 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 1976 struct nfs4_compound cp; 1977 struct nfs4_oparg_readdir readdir; 1978 struct nfsv4_fattr fattr; 1979 u_int fty; 1980 1981 #ifndef DIAGNOSTIC 1982 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 1983 (uiop->uio_resid & (DIRBLKSIZ - 1))) 1984 panic("nfs readdirrpc bad uio"); 1985 #endif 1986 1987 /* 1988 * If there is no cookie, assume directory was stale. 1989 */ 1990 cookiep = nfs4_getcookie(dnp, uiop->uio_offset, 0); 1991 if (cookiep) 1992 cookie = *cookiep; 1993 else 1994 return (NFSERR_BAD_COOKIE); 1995 1996 /* Generate fake entries for "." and ".." */ 1997 while (cookie < 2 && bigenough) { 1998 cookie++; 1999 len = 4 + DIRHDSIZ; 2000 2001 if (len > uiop->uio_resid) { 2002 bigenough = 0; 2003 break; 2004 } 2005 dp = (struct dirent *)uiop->uio_iov->iov_base; 2006 2007 dp->d_namlen = cookie; 2008 dp->d_reclen = len; 2009 dp->d_type = DT_DIR; 2010 if (cookie == 1) 2011 dp->d_fileno = dnp->n_vattr.va_fileid; /* XXX has problems with pynfs virtualhandles */ 2012 else 2013 dp->d_fileno = dnp->n_dvp != NULL ? 2014 VTONFS(dnp->n_dvp)->n_vattr.va_fileid : cookie; 2015 2016 p = dp->d_name; 2017 *p++ = '.'; 2018 if (cookie == 2) 2019 *p++ = '.'; 2020 *p = '\0'; 2021 2022 blksiz += len; 2023 if (blksiz == DIRBLKSIZ) 2024 blksiz = 0; 2025 uiop->uio_offset += len; 2026 uiop->uio_resid -= len; 2027 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + len; 2028 uiop->uio_iov->iov_len -= len; 2029 } 2030 2031 if (cookie == 2) 2032 cookie = 0; 2033 2034 /* This is sort of ugly, to prevent v4postop() from acting weird */ 2035 bzero(&cp, sizeof(cp)); 2036 2037 /* 2038 * Loop around doing readdir rpc's of size nm_readdirsize 2039 * truncated to a multiple of DIRBLKSIZ. 2040 * The stopping criteria is EOF or buffer full. 2041 */ 2042 /* 2043 * XXX this is sort of ugly for nfsv4; we don't maintain the 2044 * strict abstraction, but do the decoding inline. that's ok. 2045 */ 2046 while (more_dirs && bigenough) { 2047 nfsstats.rpccnt[NFSPROC_READDIR]++; 2048 2049 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 2050 mb = mreq; 2051 bpos = mtod(mb, caddr_t); 2052 2053 readdir.cnt = nmp->nm_readdirsize; 2054 readdir.cookie = cookie; 2055 readdir.bm = &nfsv4_readdirbm; 2056 if (cookie == 0) 2057 bzero(&readdir.verf, sizeof(readdir.verf)); 2058 else 2059 bcopy(&dnp->n_cookieverf, &readdir.verf, 2060 sizeof(readdir.verf)); 2061 2062 nfs_v4initcompound(&cp); 2063 2064 nfsm_v4build_compound(&cp, "nfs4_readdirrpc()"); 2065 nfsm_v4build_putfh(&cp, vp); 2066 nfsm_v4build_readdir(&cp, &readdir); 2067 nfsm_v4build_finalize(&cp); 2068 2069 nfsm_request(vp, NFSV4PROC_COMPOUND, uiop->uio_td, cred); 2070 if (error != 0) 2071 goto nfsmout; 2072 2073 nfsm_v4dissect_compound(&cp); 2074 nfsm_v4dissect_putfh(&cp); 2075 2076 /* 2077 * XXX - Readdir gets handled inline like in 2078 * NFSv{2,3}. This is a nasty inconsistency and 2079 * should be fixed. 2080 */ 2081 2082 tl = nfsm_dissect(uint32_t *, 5 * NFSX_UNSIGNED); 2083 if (fxdr_unsigned(uint32_t, *tl++) != NFSV4OP_READDIR) { 2084 error = EBADRPC; 2085 goto nfsmout; 2086 } 2087 if (fxdr_unsigned(uint32_t, *tl++) != 0) { 2088 error = EBADRPC; 2089 goto nfsmout; 2090 } 2091 2092 bcopy(tl, &dnp->n_cookieverf, NFSX_V4VERF); 2093 tl += 2; 2094 more_dirs = fxdr_unsigned(int, *tl++); 2095 2096 /* loop thru the dir entries, doctoring them to 4bsd form */ 2097 while (more_dirs && bigenough) { 2098 tl = nfsm_dissect(uint32_t *, 3 * NFSX_UNSIGNED); 2099 cookie = fxdr_hyper(tl); 2100 tl += 2; 2101 /* XXX cookie sanity check */ 2102 len = fxdr_unsigned(int, *tl++); 2103 if (len <= 0 || len > NFS_MAXNAMLEN) { 2104 error = EBADRPC; 2105 goto nfsmout; 2106 } 2107 tlen = nfsm_rndup(len); 2108 if (tlen == len) 2109 tlen += 4; /* To ensure null termination */ 2110 left = DIRBLKSIZ - blksiz; 2111 if ((tlen + DIRHDSIZ) > left) { 2112 dp->d_reclen += left; 2113 uiop->uio_iov->iov_base = 2114 (char *)uiop->uio_iov->iov_base + left; 2115 uiop->uio_iov->iov_len -= left; 2116 uiop->uio_offset += left; 2117 uiop->uio_resid -= left; 2118 blksiz = 0; 2119 } 2120 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2121 bigenough = 0; 2122 if (bigenough) { 2123 dp = (struct dirent *)uiop->uio_iov->iov_base; 2124 2125 dp->d_namlen = len; 2126 dp->d_reclen = tlen + DIRHDSIZ; 2127 2128 blksiz += dp->d_reclen; 2129 if (blksiz == DIRBLKSIZ) 2130 blksiz = 0; 2131 uiop->uio_offset += DIRHDSIZ; 2132 uiop->uio_resid -= DIRHDSIZ; 2133 uiop->uio_iov->iov_base = 2134 (char *)uiop->uio_iov->iov_base + DIRHDSIZ; 2135 uiop->uio_iov->iov_len -= DIRHDSIZ; 2136 2137 /* Copy name */ 2138 nfsm_mtouio(uiop, len); 2139 p = uiop->uio_iov->iov_base; 2140 tlen -= len; 2141 *p = '\0'; /* null terminate */ 2142 /* printf("nfs4_readdirrpc: name: \"%s\" cookie %d\n", 2143 p - len, (int) cookie);*/ 2144 uiop->uio_iov->iov_base = 2145 (char *)uiop->uio_iov->iov_base + tlen; 2146 uiop->uio_iov->iov_len -= tlen; 2147 uiop->uio_offset += tlen; 2148 uiop->uio_resid -= tlen; 2149 2150 /* Copy attributes */ 2151 nfsm_v4dissect_attrs(&fattr); 2152 2153 dp->d_fileno = nfs_v4fileid4_to_fileid( 2154 fattr.fa4_valid & FA4V_FILEID && 2155 fattr.fa4_fileid ? 2156 fattr.fa4_fileid : cookie); 2157 2158 fty = (u_int)fattr.fa4_type; 2159 dp->d_type = fattr.fa4_valid & FA4V_TYPE && 2160 (fty < sizeof(fty_to_dty)) ? 2161 fty_to_dty[fty] : DT_UNKNOWN; 2162 } else 2163 nfsm_adv(nfsm_rndup(len)); 2164 2165 tl = nfsm_dissect(uint32_t *, NFSX_UNSIGNED); 2166 more_dirs = fxdr_unsigned(int, *tl++); 2167 } 2168 /* 2169 * If at end of rpc data, get the eof boolean 2170 */ 2171 if (!more_dirs) { 2172 tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); 2173 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2174 } 2175 2176 error = nfs_v4postop(&cp, error); 2177 2178 m_freem(mrep); 2179 mrep = NULL; 2180 } 2181 /* 2182 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2183 * by increasing d_reclen for the last record. 2184 */ 2185 if (blksiz > 0) { 2186 left = DIRBLKSIZ - blksiz; 2187 dp->d_reclen += left; 2188 uiop->uio_iov->iov_base = 2189 (char *)uiop->uio_iov->iov_base + left; 2190 uiop->uio_iov->iov_len -= left; 2191 uiop->uio_offset += left; 2192 uiop->uio_resid -= left; 2193 } 2194 2195 /* 2196 * We are now either at the end of the directory or have filled the 2197 * block. 2198 */ 2199 if (bigenough) 2200 dnp->n_direofoffset = uiop->uio_offset; 2201 else { 2202 if (uiop->uio_resid > 0) 2203 printf("EEK! readdirrpc resid > 0\n"); 2204 cookiep = nfs4_getcookie(dnp, uiop->uio_offset, 1); 2205 *cookiep = cookie; 2206 } 2207 nfsmout: 2208 if (mrep != NULL) 2209 m_freem(mrep); 2210 return (error); 2211 } 2212 2213 /* 2214 * Silly rename. To make the NFS filesystem that is stateless look a little 2215 * more like the "ufs" a remove of an active vnode is translated to a rename 2216 * to a funny looking filename that is removed by nfs_inactive on the 2217 * nfsnode. There is the potential for another process on a different client 2218 * to create the same funny name between the nfs_lookitup() fails and the 2219 * nfs_rename() completes, but... 2220 */ 2221 static int 2222 nfs4_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2223 { 2224 struct sillyrename *sp; 2225 struct nfsnode *np; 2226 int error; 2227 short pid; 2228 2229 cache_purge(dvp); 2230 np = VTONFS(vp); 2231 #ifndef DIAGNOSTIC 2232 if (vp->v_type == VDIR) 2233 panic("nfs: sillyrename dir"); 2234 #endif 2235 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2236 M_NFSREQ, M_WAITOK); 2237 sp->s_cred = crhold(cnp->cn_cred); 2238 sp->s_dvp = dvp; 2239 sp->s_removeit = nfs4_removeit; 2240 VREF(dvp); 2241 2242 /* Fudge together a funny name */ 2243 pid = cnp->cn_thread->td_proc->p_pid; 2244 sp->s_namlen = sprintf(sp->s_name, ".nfsA%04x4.4", pid); 2245 2246 /* Try lookitups until we get one that isn't there */ 2247 while (nfs4_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2248 cnp->cn_thread, NULL) == 0) { 2249 sp->s_name[4]++; 2250 if (sp->s_name[4] > 'z') { 2251 error = EINVAL; 2252 goto bad; 2253 } 2254 } 2255 error = nfs4_renameit(dvp, cnp, sp); 2256 if (error) 2257 goto bad; 2258 error = nfs4_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2259 cnp->cn_thread, &np); 2260 np->n_sillyrename = sp; 2261 return (0); 2262 bad: 2263 vrele(sp->s_dvp); 2264 crfree(sp->s_cred); 2265 free((caddr_t)sp, M_NFSREQ); 2266 return (error); 2267 } 2268 2269 /* 2270 * Look up a file name and optionally either update the file handle or 2271 * allocate an nfsnode, depending on the value of npp. 2272 * npp == NULL --> just do the lookup 2273 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2274 * handled too 2275 * *npp != NULL --> update the file handle in the vnode 2276 */ 2277 static int 2278 nfs4_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred, 2279 struct thread *td, struct nfsnode **npp) 2280 { 2281 struct vnode *newvp = NULL; 2282 struct nfsnode *np, *dnp = VTONFS(dvp); 2283 caddr_t bpos, dpos; 2284 int error = 0, fhlen; 2285 struct mbuf *mreq, *mrep = NULL, *md, *mb; 2286 nfsfh_t *nfhp; 2287 struct nfs4_compound cp; 2288 struct nfs4_oparg_lookup l; 2289 struct nfs4_oparg_getfh gfh; 2290 struct nfs4_oparg_getattr ga; 2291 2292 nfsstats.rpccnt[NFSPROC_RENAME]++; 2293 2294 mreq = nfsm_reqhead(dvp, NFSV4PROC_COMPOUND, 0); 2295 mb = mreq; 2296 bpos = mtod(mb, caddr_t); 2297 2298 l.name = name; 2299 l.namelen = len; 2300 2301 nfs_v4initcompound(&cp); 2302 2303 ga.bm = &nfsv4_getattrbm; 2304 2305 nfsm_v4build_compound(&cp, "nfs4_renamerpc()"); 2306 nfsm_v4build_putfh(&cp, dvp); 2307 nfsm_v4build_lookup(&cp, &l); 2308 nfsm_v4build_getfh(&cp, &gfh); 2309 nfsm_v4build_getattr(&cp, &ga); 2310 2311 nfsm_request(dvp, NFSV4PROC_COMPOUND, td, cred); 2312 if (error != 0) 2313 goto nfsmout; 2314 2315 nfsm_v4dissect_compound(&cp); 2316 nfsm_v4dissect_putfh(&cp); 2317 nfsm_v4dissect_lookup(&cp); 2318 nfsm_v4dissect_getfh(&cp, &gfh); 2319 nfsm_v4dissect_getattr(&cp, &ga); 2320 2321 if (npp != NULL && error == 0) { 2322 nfhp = &gfh.fh_val; 2323 fhlen = gfh.fh_len; 2324 2325 if (*npp != NULL) { 2326 np = *npp; 2327 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2328 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2329 np->n_fhp = &np->n_fh; 2330 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2331 np->n_fhp =(nfsfh_t *)malloc(fhlen, M_NFSBIGFH, M_WAITOK); 2332 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2333 np->n_fhsize = fhlen; 2334 newvp = NFSTOV(np); 2335 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2336 VREF(dvp); 2337 newvp = dvp; 2338 } else { 2339 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np, LK_EXCLUSIVE); 2340 if (error) { 2341 m_freem(mrep); 2342 return (error); 2343 } 2344 newvp = NFSTOV(np); 2345 } 2346 2347 if (newvp != dvp) { 2348 np->n_dvp = dvp; 2349 np->n_namelen = len; 2350 if (np->n_name != NULL) 2351 FREE(np->n_name, M_NFSREQ); 2352 MALLOC(np->n_name, u_char *, 2353 np->n_namelen + 1, M_NFSREQ, M_WAITOK); 2354 memcpy(np->n_name, name, len); 2355 np->n_name[len] = '\0'; 2356 } 2357 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL); 2358 } 2359 2360 nfsmout: 2361 error = nfs_v4postop(&cp, error); 2362 2363 if (mrep != NULL) 2364 m_freem(mrep); 2365 if (npp && *npp == NULL) { 2366 if (error) { 2367 if (newvp) { 2368 if (newvp == dvp) 2369 vrele(newvp); 2370 else 2371 vput(newvp); 2372 } 2373 } else 2374 *npp = np; 2375 } 2376 2377 2378 return (error); 2379 } 2380 2381 /* 2382 * Nfs Version 3 commit rpc 2383 */ 2384 int 2385 nfs4_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred, 2386 struct thread *td) 2387 { 2388 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2389 caddr_t bpos, dpos; 2390 int error = 0; 2391 struct mbuf *mreq, *mrep = NULL, *md, *mb; 2392 struct nfs4_compound cp; 2393 struct nfs4_oparg_commit commit; 2394 2395 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) 2396 return (0); 2397 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2398 2399 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0); 2400 mb = mreq; 2401 bpos = mtod(mb, caddr_t); 2402 2403 commit.start = offset; 2404 commit.len = cnt; 2405 2406 nfs_v4initcompound(&cp); 2407 2408 nfsm_v4build_compound(&cp, "nfs4_commit()"); 2409 nfsm_v4build_putfh(&cp, vp); 2410 nfsm_v4build_commit(&cp, &commit); 2411 nfsm_v4build_finalize(&cp); 2412 2413 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred); 2414 if (error != 0) 2415 goto nfsmout; 2416 2417 nfsm_v4dissect_compound(&cp); 2418 nfsm_v4dissect_putfh(&cp); 2419 nfsm_v4dissect_commit(&cp, &commit); 2420 2421 /* XXX */ 2422 /* nfsm_wcc_data(vp, wccflag);*/ 2423 if (bcmp(nmp->nm_verf, commit.verf, NFSX_V4VERF)) { 2424 bcopy(commit.verf, nmp->nm_verf, NFSX_V4VERF); 2425 error = NFSERR_STALEWRITEVERF; 2426 } 2427 2428 nfsmout: 2429 error = nfs_v4postop(&cp, error); 2430 2431 if (mrep == NULL) 2432 m_freem(mrep); 2433 return (error); 2434 } 2435 2436 /* 2437 * Strategy routine. 2438 * For async requests when nfsiod(s) are running, queue the request by 2439 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2440 * request. 2441 */ 2442 static int 2443 nfs4_strategy(struct vop_strategy_args *ap) 2444 { 2445 struct buf *bp = ap->a_bp; 2446 struct ucred *cr; 2447 int error = 0; 2448 2449 KASSERT(!(bp->b_flags & B_DONE), ("nfs4_strategy: buffer %p unexpectedly marked B_DONE", bp)); 2450 KASSERT(BUF_REFCNT(bp) > 0, ("nfs4_strategy: buffer %p not locked", bp)); 2451 2452 if (bp->b_iocmd == BIO_READ) 2453 cr = bp->b_rcred; 2454 else 2455 cr = bp->b_wcred; 2456 2457 /* 2458 * If the op is asynchronous and an i/o daemon is waiting 2459 * queue the request, wake it up and wait for completion 2460 * otherwise just do it ourselves. 2461 */ 2462 if ((bp->b_flags & B_ASYNC) == 0 || 2463 nfs_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread)) 2464 error = nfs_doio(ap->a_vp, bp, cr, curthread); 2465 return (error); 2466 } 2467 2468 /* 2469 * fsync vnode op. Just call nfs4_flush() with commit == 1. 2470 */ 2471 /* ARGSUSED */ 2472 static int 2473 nfs4_fsync(struct vop_fsync_args *ap) 2474 { 2475 return (nfs4_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1)); 2476 } 2477 2478 /* 2479 * Flush all the blocks associated with a vnode. 2480 * Walk through the buffer pool and push any dirty pages 2481 * associated with the vnode. 2482 */ 2483 static int 2484 nfs4_flush(struct vnode *vp, int waitfor, struct thread *td, 2485 int commit) 2486 { 2487 struct nfsnode *np = VTONFS(vp); 2488 struct buf *bp; 2489 int i; 2490 struct buf *nbp; 2491 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2492 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2493 int passone = 1; 2494 u_quad_t off, endoff, toff; 2495 struct ucred* wcred = NULL; 2496 struct buf **bvec = NULL; 2497 #ifndef NFS_COMMITBVECSIZ 2498 #define NFS_COMMITBVECSIZ 20 2499 #endif 2500 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; 2501 int bvecsize = 0, bveccount; 2502 2503 if (nmp->nm_flag & NFSMNT_INT) 2504 slpflag = PCATCH; 2505 if (!commit) 2506 passone = 0; 2507 /* 2508 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2509 * server, but nas not been committed to stable storage on the server 2510 * yet. On the first pass, the byte range is worked out and the commit 2511 * rpc is done. On the second pass, nfs_writebp() is called to do the 2512 * job. 2513 */ 2514 again: 2515 off = (u_quad_t)-1; 2516 endoff = 0; 2517 bvecpos = 0; 2518 if (NFS_ISV3(vp) && commit) { 2519 s = splbio(); 2520 if (bvec != NULL && bvec != bvec_on_stack) 2521 free(bvec, M_TEMP); 2522 /* 2523 * Count up how many buffers waiting for a commit. 2524 */ 2525 bveccount = 0; 2526 VI_LOCK(vp); 2527 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) { 2528 if (BUF_REFCNT(bp) == 0 && 2529 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2530 == (B_DELWRI | B_NEEDCOMMIT)) 2531 bveccount++; 2532 } 2533 /* 2534 * Allocate space to remember the list of bufs to commit. It is 2535 * important to use M_NOWAIT here to avoid a race with nfs4_write. 2536 * If we can't get memory (for whatever reason), we will end up 2537 * committing the buffers one-by-one in the loop below. 2538 */ 2539 if (bveccount > NFS_COMMITBVECSIZ) { 2540 /* 2541 * Release the vnode interlock to avoid a lock 2542 * order reversal. 2543 */ 2544 VI_UNLOCK(vp); 2545 bvec = (struct buf **) 2546 malloc(bveccount * sizeof(struct buf *), 2547 M_TEMP, M_NOWAIT); 2548 VI_LOCK(vp); 2549 if (bvec == NULL) { 2550 bvec = bvec_on_stack; 2551 bvecsize = NFS_COMMITBVECSIZ; 2552 } else 2553 bvecsize = bveccount; 2554 } else { 2555 bvec = bvec_on_stack; 2556 bvecsize = NFS_COMMITBVECSIZ; 2557 } 2558 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) { 2559 if (bvecpos >= bvecsize) 2560 break; 2561 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 2562 nbp = TAILQ_NEXT(bp, b_bobufs); 2563 continue; 2564 } 2565 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 2566 (B_DELWRI | B_NEEDCOMMIT)) { 2567 BUF_UNLOCK(bp); 2568 nbp = TAILQ_NEXT(bp, b_bobufs); 2569 continue; 2570 } 2571 VI_UNLOCK(vp); 2572 bremfree(bp); 2573 /* 2574 * Work out if all buffers are using the same cred 2575 * so we can deal with them all with one commit. 2576 * 2577 * NOTE: we are not clearing B_DONE here, so we have 2578 * to do it later on in this routine if we intend to 2579 * initiate I/O on the bp. 2580 * 2581 * Note: to avoid loopback deadlocks, we do not 2582 * assign b_runningbufspace. 2583 */ 2584 if (wcred == NULL) 2585 wcred = bp->b_wcred; 2586 else if (wcred != bp->b_wcred) 2587 wcred = NOCRED; 2588 vfs_busy_pages(bp, 1); 2589 2590 VI_LOCK(vp); 2591 /* 2592 * bp is protected by being locked, but nbp is not 2593 * and vfs_busy_pages() may sleep. We have to 2594 * recalculate nbp. 2595 */ 2596 nbp = TAILQ_NEXT(bp, b_bobufs); 2597 2598 /* 2599 * A list of these buffers is kept so that the 2600 * second loop knows which buffers have actually 2601 * been committed. This is necessary, since there 2602 * may be a race between the commit rpc and new 2603 * uncommitted writes on the file. 2604 */ 2605 bvec[bvecpos++] = bp; 2606 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2607 bp->b_dirtyoff; 2608 if (toff < off) 2609 off = toff; 2610 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2611 if (toff > endoff) 2612 endoff = toff; 2613 } 2614 splx(s); 2615 VI_UNLOCK(vp); 2616 } 2617 if (bvecpos > 0) { 2618 /* 2619 * Commit data on the server, as required. 2620 * If all bufs are using the same wcred, then use that with 2621 * one call for all of them, otherwise commit each one 2622 * separately. 2623 */ 2624 if (wcred != NOCRED) 2625 retv = nfs4_commit(vp, off, (int)(endoff - off), 2626 wcred, td); 2627 else { 2628 retv = 0; 2629 for (i = 0; i < bvecpos; i++) { 2630 off_t off, size; 2631 bp = bvec[i]; 2632 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2633 bp->b_dirtyoff; 2634 size = (u_quad_t)(bp->b_dirtyend 2635 - bp->b_dirtyoff); 2636 retv = nfs4_commit(vp, off, (int)size, 2637 bp->b_wcred, td); 2638 if (retv) break; 2639 } 2640 } 2641 2642 if (retv == NFSERR_STALEWRITEVERF) 2643 nfs_clearcommit(vp->v_mount); 2644 2645 /* 2646 * Now, either mark the blocks I/O done or mark the 2647 * blocks dirty, depending on whether the commit 2648 * succeeded. 2649 */ 2650 for (i = 0; i < bvecpos; i++) { 2651 bp = bvec[i]; 2652 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2653 if (retv) { 2654 /* 2655 * Error, leave B_DELWRI intact 2656 */ 2657 vfs_unbusy_pages(bp); 2658 brelse(bp); 2659 } else { 2660 /* 2661 * Success, remove B_DELWRI ( bundirty() ). 2662 * 2663 * b_dirtyoff/b_dirtyend seem to be NFS 2664 * specific. We should probably move that 2665 * into bundirty(). XXX 2666 */ 2667 s = splbio(); 2668 bufobj_wref(&vp->v_bufobj); 2669 bp->b_flags |= B_ASYNC; 2670 bundirty(bp); 2671 bp->b_flags &= ~B_DONE; 2672 bp->b_ioflags &= ~BIO_ERROR; 2673 bp->b_dirtyoff = bp->b_dirtyend = 0; 2674 splx(s); 2675 bufdone(bp); 2676 } 2677 } 2678 } 2679 2680 /* 2681 * Start/do any write(s) that are required. 2682 */ 2683 loop: 2684 s = splbio(); 2685 VI_LOCK(vp); 2686 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) { 2687 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 2688 if (waitfor != MNT_WAIT || passone) 2689 continue; 2690 2691 error = BUF_TIMELOCK(bp, 2692 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, 2693 VI_MTX(vp), "nfsfsync", slpflag, slptimeo); 2694 splx(s); 2695 if (error == 0) 2696 panic("nfs4_fsync: inconsistent lock"); 2697 if (error == ENOLCK) 2698 goto loop; 2699 if (nfs4_sigintr(nmp, NULL, td)) { 2700 error = EINTR; 2701 goto done; 2702 } 2703 if (slpflag == PCATCH) { 2704 slpflag = 0; 2705 slptimeo = 2 * hz; 2706 } 2707 goto loop; 2708 } 2709 if ((bp->b_flags & B_DELWRI) == 0) 2710 panic("nfs4_fsync: not dirty"); 2711 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) { 2712 BUF_UNLOCK(bp); 2713 continue; 2714 } 2715 VI_UNLOCK(vp); 2716 bremfree(bp); 2717 if (passone || !commit) 2718 bp->b_flags |= B_ASYNC; 2719 else 2720 bp->b_flags |= B_ASYNC; 2721 splx(s); 2722 bwrite(bp); 2723 goto loop; 2724 } 2725 splx(s); 2726 if (passone) { 2727 passone = 0; 2728 VI_UNLOCK(vp); 2729 goto again; 2730 } 2731 if (waitfor == MNT_WAIT) { 2732 while (vp->v_bufobj.bo_numoutput) { 2733 error = bufobj_wwait(&vp->v_bufobj, slpflag, slptimeo); 2734 if (error) { 2735 VI_UNLOCK(vp); 2736 if (nfs4_sigintr(nmp, NULL, td)) { 2737 error = EINTR; 2738 goto done; 2739 } 2740 if (slpflag == PCATCH) { 2741 slpflag = 0; 2742 slptimeo = 2 * hz; 2743 } 2744 VI_LOCK(vp); 2745 } 2746 } 2747 if (vp->v_bufobj.bo_dirty.bv_cnt > 0 && commit) { 2748 VI_UNLOCK(vp); 2749 goto loop; 2750 } 2751 } 2752 VI_UNLOCK(vp); 2753 if (np->n_flag & NWRITEERR) { 2754 error = np->n_error; 2755 np->n_flag &= ~NWRITEERR; 2756 } 2757 done: 2758 if (bvec != NULL && bvec != bvec_on_stack) 2759 free(bvec, M_TEMP); 2760 return (error); 2761 } 2762 2763 /* 2764 * NFS advisory byte-level locks. 2765 */ 2766 static int 2767 nfs4_advlock(struct vop_advlock_args *ap) 2768 { 2769 return (EPERM); 2770 2771 if ((VFSTONFS(ap->a_vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) { 2772 struct nfsnode *np = VTONFS(ap->a_vp); 2773 2774 return (lf_advlock(ap, &(np->n_lockf), np->n_size)); 2775 } 2776 return (nfs_dolock(ap)); 2777 } 2778 2779 /* 2780 * Print out the contents of an nfsnode. 2781 */ 2782 static int 2783 nfs4_print(struct vop_print_args *ap) 2784 { 2785 struct vnode *vp = ap->a_vp; 2786 struct nfsnode *np = VTONFS(vp); 2787 2788 printf("\tfileid %ld fsid 0x%x", 2789 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 2790 if (vp->v_type == VFIFO) 2791 fifo_printinfo(vp); 2792 printf("\n"); 2793 return (0); 2794 } 2795 2796 /* 2797 * This is the "real" nfs::bwrite(struct buf*). 2798 * We set B_CACHE if this is a VMIO buffer. 2799 */ 2800 int 2801 nfs4_writebp(struct buf *bp, int force __unused, struct thread *td) 2802 { 2803 int s; 2804 int oldflags = bp->b_flags; 2805 #if 0 2806 int retv = 1; 2807 off_t off; 2808 #endif 2809 2810 if (BUF_REFCNT(bp) == 0) 2811 panic("bwrite: buffer is not locked???"); 2812 2813 if (bp->b_flags & B_INVAL) { 2814 brelse(bp); 2815 return(0); 2816 } 2817 2818 bp->b_flags |= B_CACHE; 2819 2820 /* 2821 * Undirty the bp. We will redirty it later if the I/O fails. 2822 */ 2823 2824 s = splbio(); 2825 bundirty(bp); 2826 bp->b_flags &= ~B_DONE; 2827 bp->b_ioflags &= ~BIO_ERROR; 2828 bp->b_iocmd = BIO_WRITE; 2829 2830 bufobj_wref(bp->b_bufobj); 2831 curthread->td_ru.ru_oublock++; 2832 splx(s); 2833 2834 /* 2835 * Note: to avoid loopback deadlocks, we do not 2836 * assign b_runningbufspace. 2837 */ 2838 vfs_busy_pages(bp, 1); 2839 2840 BUF_KERNPROC(bp); 2841 bp->b_iooffset = dbtob(bp->b_blkno); 2842 bstrategy(bp); 2843 2844 if( (oldflags & B_ASYNC) == 0) { 2845 int rtval = bufwait(bp); 2846 2847 if (oldflags & B_DELWRI) { 2848 s = splbio(); 2849 reassignbuf(bp); 2850 splx(s); 2851 } 2852 2853 brelse(bp); 2854 return (rtval); 2855 } 2856 2857 return (0); 2858 } 2859 2860 /* 2861 * Just call nfs_writebp() with the force argument set to 1. 2862 * 2863 * NOTE: B_DONE may or may not be set in a_bp on call. 2864 */ 2865 static int 2866 nfs4_bwrite(struct buf *bp) 2867 { 2868 2869 return (nfs4_writebp(bp, 1, curthread)); 2870 } 2871 2872 struct buf_ops buf_ops_nfs4 = { 2873 .bop_name = "buf_ops_nfs4", 2874 .bop_write = nfs4_bwrite, 2875 .bop_strategy = bufstrategy, 2876 .bop_sync = bufsync, 2877 .bop_bdflush = bufbdflush, 2878 };
Cache object: 8345c08af5f29cc94616df2186862067
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