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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from nfs_vnops.c 8.16 (Berkeley) 5/27/95 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 /* 39 * vnode op calls for Sun NFS version 2, 3 and 4 40 */ 41 42 #include "opt_inet.h" 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/systm.h> 47 #include <sys/resourcevar.h> 48 #include <sys/proc.h> 49 #include <sys/mount.h> 50 #include <sys/bio.h> 51 #include <sys/buf.h> 52 #include <sys/jail.h> 53 #include <sys/malloc.h> 54 #include <sys/mbuf.h> 55 #include <sys/namei.h> 56 #include <sys/socket.h> 57 #include <sys/vnode.h> 58 #include <sys/dirent.h> 59 #include <sys/fcntl.h> 60 #include <sys/lockf.h> 61 #include <sys/stat.h> 62 #include <sys/sysctl.h> 63 #include <sys/signalvar.h> 64 65 #include <vm/vm.h> 66 #include <vm/vm_object.h> 67 #include <vm/vm_extern.h> 68 #include <vm/vm_object.h> 69 70 #include <fs/nfs/nfsport.h> 71 #include <fs/nfsclient/nfsnode.h> 72 #include <fs/nfsclient/nfsmount.h> 73 #include <fs/nfsclient/nfs.h> 74 75 #include <net/if.h> 76 #include <netinet/in.h> 77 #include <netinet/in_var.h> 78 79 #include <nfs/nfs_lock.h> 80 81 /* Defs */ 82 #define TRUE 1 83 #define FALSE 0 84 85 extern struct nfsstats newnfsstats; 86 MALLOC_DECLARE(M_NEWNFSREQ); 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 97 static vop_read_t nfsfifo_read; 98 static vop_write_t nfsfifo_write; 99 static vop_close_t nfsfifo_close; 100 static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *, 101 struct thread *); 102 static vop_lookup_t nfs_lookup; 103 static vop_create_t nfs_create; 104 static vop_mknod_t nfs_mknod; 105 static vop_open_t nfs_open; 106 static vop_close_t nfs_close; 107 static vop_access_t nfs_access; 108 static vop_getattr_t nfs_getattr; 109 static vop_setattr_t nfs_setattr; 110 static vop_read_t nfs_read; 111 static vop_fsync_t nfs_fsync; 112 static vop_remove_t nfs_remove; 113 static vop_link_t nfs_link; 114 static vop_rename_t nfs_rename; 115 static vop_mkdir_t nfs_mkdir; 116 static vop_rmdir_t nfs_rmdir; 117 static vop_symlink_t nfs_symlink; 118 static vop_readdir_t nfs_readdir; 119 static vop_strategy_t nfs_strategy; 120 static vop_lock1_t nfs_lock1; 121 static int nfs_lookitup(struct vnode *, char *, int, 122 struct ucred *, struct thread *, struct nfsnode **); 123 static int nfs_sillyrename(struct vnode *, struct vnode *, 124 struct componentname *); 125 static vop_access_t nfsspec_access; 126 static vop_readlink_t nfs_readlink; 127 static vop_print_t nfs_print; 128 static vop_advlock_t nfs_advlock; 129 static vop_advlockasync_t nfs_advlockasync; 130 static vop_getacl_t nfs_getacl; 131 static vop_setacl_t nfs_setacl; 132 133 /* 134 * Global vfs data structures for nfs 135 */ 136 struct vop_vector newnfs_vnodeops = { 137 .vop_default = &default_vnodeops, 138 .vop_access = nfs_access, 139 .vop_advlock = nfs_advlock, 140 .vop_advlockasync = nfs_advlockasync, 141 .vop_close = nfs_close, 142 .vop_create = nfs_create, 143 .vop_fsync = nfs_fsync, 144 .vop_getattr = nfs_getattr, 145 .vop_getpages = ncl_getpages, 146 .vop_putpages = ncl_putpages, 147 .vop_inactive = ncl_inactive, 148 .vop_link = nfs_link, 149 .vop_lock1 = nfs_lock1, 150 .vop_lookup = nfs_lookup, 151 .vop_mkdir = nfs_mkdir, 152 .vop_mknod = nfs_mknod, 153 .vop_open = nfs_open, 154 .vop_print = nfs_print, 155 .vop_read = nfs_read, 156 .vop_readdir = nfs_readdir, 157 .vop_readlink = nfs_readlink, 158 .vop_reclaim = ncl_reclaim, 159 .vop_remove = nfs_remove, 160 .vop_rename = nfs_rename, 161 .vop_rmdir = nfs_rmdir, 162 .vop_setattr = nfs_setattr, 163 .vop_strategy = nfs_strategy, 164 .vop_symlink = nfs_symlink, 165 .vop_write = ncl_write, 166 .vop_getacl = nfs_getacl, 167 .vop_setacl = nfs_setacl, 168 }; 169 170 struct vop_vector newnfs_fifoops = { 171 .vop_default = &fifo_specops, 172 .vop_access = nfsspec_access, 173 .vop_close = nfsfifo_close, 174 .vop_fsync = nfs_fsync, 175 .vop_getattr = nfs_getattr, 176 .vop_inactive = ncl_inactive, 177 .vop_print = nfs_print, 178 .vop_read = nfsfifo_read, 179 .vop_reclaim = ncl_reclaim, 180 .vop_setattr = nfs_setattr, 181 .vop_write = nfsfifo_write, 182 }; 183 184 static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, 185 struct componentname *cnp, struct vattr *vap); 186 static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, 187 int namelen, struct ucred *cred, struct thread *td); 188 static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, 189 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp, 190 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td); 191 static int nfs_renameit(struct vnode *sdvp, struct vnode *svp, 192 struct componentname *scnp, struct sillyrename *sp); 193 194 /* 195 * Global variables 196 */ 197 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 198 199 SYSCTL_DECL(_vfs_newnfs); 200 201 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO; 202 SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, 203 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); 204 205 static int nfs_prime_access_cache = 0; 206 SYSCTL_INT(_vfs_newnfs, OID_AUTO, prime_access_cache, CTLFLAG_RW, 207 &nfs_prime_access_cache, 0, 208 "Prime NFS ACCESS cache when fetching attributes"); 209 210 static int newnfs_commit_on_close = 0; 211 SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_on_close, CTLFLAG_RW, 212 &newnfs_commit_on_close, 0, "write+commit on close, else only write"); 213 214 static int nfs_clean_pages_on_close = 1; 215 SYSCTL_INT(_vfs_newnfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW, 216 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close"); 217 218 int newnfs_directio_enable = 0; 219 SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_enable, CTLFLAG_RW, 220 &newnfs_directio_enable, 0, "Enable NFS directio"); 221 222 /* 223 * This sysctl allows other processes to mmap a file that has been opened 224 * O_DIRECT by a process. In general, having processes mmap the file while 225 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow 226 * this by default to prevent DoS attacks - to prevent a malicious user from 227 * opening up files O_DIRECT preventing other users from mmap'ing these 228 * files. "Protected" environments where stricter consistency guarantees are 229 * required can disable this knob. The process that opened the file O_DIRECT 230 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not 231 * meaningful. 232 */ 233 int newnfs_directio_allow_mmap = 1; 234 SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_allow_mmap, CTLFLAG_RW, 235 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens"); 236 237 #if 0 238 SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_hits, CTLFLAG_RD, 239 &newnfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count"); 240 241 SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_misses, CTLFLAG_RD, 242 &newnfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count"); 243 #endif 244 245 #define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \ 246 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \ 247 | NFSACCESS_DELETE | NFSACCESS_LOOKUP) 248 249 /* 250 * SMP Locking Note : 251 * The list of locks after the description of the lock is the ordering 252 * of other locks acquired with the lock held. 253 * np->n_mtx : Protects the fields in the nfsnode. 254 VM Object Lock 255 VI_MTX (acquired indirectly) 256 * nmp->nm_mtx : Protects the fields in the nfsmount. 257 rep->r_mtx 258 * ncl_iod_mutex : Global lock, protects shared nfsiod state. 259 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list. 260 nmp->nm_mtx 261 rep->r_mtx 262 * rep->r_mtx : Protects the fields in an nfsreq. 263 */ 264 265 static int 266 nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td, 267 struct ucred *cred, u_int32_t *retmode) 268 { 269 int error = 0, attrflag, i, lrupos; 270 u_int32_t rmode; 271 struct nfsnode *np = VTONFS(vp); 272 struct nfsvattr nfsva; 273 274 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag, 275 &rmode, NULL); 276 if (attrflag) 277 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 278 if (!error) { 279 lrupos = 0; 280 mtx_lock(&np->n_mtx); 281 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) { 282 if (np->n_accesscache[i].uid == cred->cr_uid) { 283 np->n_accesscache[i].mode = rmode; 284 np->n_accesscache[i].stamp = time_second; 285 break; 286 } 287 if (i > 0 && np->n_accesscache[i].stamp < 288 np->n_accesscache[lrupos].stamp) 289 lrupos = i; 290 } 291 if (i == NFS_ACCESSCACHESIZE) { 292 np->n_accesscache[lrupos].uid = cred->cr_uid; 293 np->n_accesscache[lrupos].mode = rmode; 294 np->n_accesscache[lrupos].stamp = time_second; 295 } 296 mtx_unlock(&np->n_mtx); 297 if (retmode != NULL) 298 *retmode = rmode; 299 } else if (NFS_ISV4(vp)) { 300 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 301 } 302 return (error); 303 } 304 305 /* 306 * nfs access vnode op. 307 * For nfs version 2, just return ok. File accesses may fail later. 308 * For nfs version 3, use the access rpc to check accessibility. If file modes 309 * are changed on the server, accesses might still fail later. 310 */ 311 static int 312 nfs_access(struct vop_access_args *ap) 313 { 314 struct vnode *vp = ap->a_vp; 315 int error = 0, i, gotahit; 316 u_int32_t mode, wmode, rmode; 317 int v34 = NFS_ISV34(vp); 318 struct nfsnode *np = VTONFS(vp); 319 320 /* 321 * Disallow write attempts on filesystems mounted read-only; 322 * unless the file is a socket, fifo, or a block or character 323 * device resident on the filesystem. 324 */ 325 if ((ap->a_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS | 326 VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL | 327 VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) { 328 switch (vp->v_type) { 329 case VREG: 330 case VDIR: 331 case VLNK: 332 return (EROFS); 333 default: 334 break; 335 } 336 } 337 /* 338 * For nfs v3 or v4, check to see if we have done this recently, and if 339 * so return our cached result instead of making an ACCESS call. 340 * If not, do an access rpc, otherwise you are stuck emulating 341 * ufs_access() locally using the vattr. This may not be correct, 342 * since the server may apply other access criteria such as 343 * client uid-->server uid mapping that we do not know about. 344 */ 345 if (v34) { 346 if (ap->a_accmode & VREAD) 347 mode = NFSACCESS_READ; 348 else 349 mode = 0; 350 if (vp->v_type != VDIR) { 351 if (ap->a_accmode & VWRITE) 352 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND); 353 if (ap->a_accmode & VAPPEND) 354 mode |= NFSACCESS_EXTEND; 355 if (ap->a_accmode & VEXEC) 356 mode |= NFSACCESS_EXECUTE; 357 if (ap->a_accmode & VDELETE) 358 mode |= NFSACCESS_DELETE; 359 } else { 360 if (ap->a_accmode & VWRITE) 361 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND); 362 if (ap->a_accmode & VAPPEND) 363 mode |= NFSACCESS_EXTEND; 364 if (ap->a_accmode & VEXEC) 365 mode |= NFSACCESS_LOOKUP; 366 if (ap->a_accmode & VDELETE) 367 mode |= NFSACCESS_DELETE; 368 if (ap->a_accmode & VDELETE_CHILD) 369 mode |= NFSACCESS_MODIFY; 370 } 371 /* XXX safety belt, only make blanket request if caching */ 372 if (nfsaccess_cache_timeout > 0) { 373 wmode = NFSACCESS_READ | NFSACCESS_MODIFY | 374 NFSACCESS_EXTEND | NFSACCESS_EXECUTE | 375 NFSACCESS_DELETE | NFSACCESS_LOOKUP; 376 } else { 377 wmode = mode; 378 } 379 380 /* 381 * Does our cached result allow us to give a definite yes to 382 * this request? 383 */ 384 gotahit = 0; 385 mtx_lock(&np->n_mtx); 386 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) { 387 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) { 388 if (time_second < (np->n_accesscache[i].stamp 389 + nfsaccess_cache_timeout) && 390 (np->n_accesscache[i].mode & mode) == mode) { 391 NFSINCRGLOBAL(newnfsstats.accesscache_hits); 392 gotahit = 1; 393 } 394 break; 395 } 396 } 397 mtx_unlock(&np->n_mtx); 398 if (gotahit == 0) { 399 /* 400 * Either a no, or a don't know. Go to the wire. 401 */ 402 NFSINCRGLOBAL(newnfsstats.accesscache_misses); 403 error = nfs34_access_otw(vp, wmode, ap->a_td, 404 ap->a_cred, &rmode); 405 if (!error && 406 (rmode & mode) != mode) 407 error = EACCES; 408 } 409 return (error); 410 } else { 411 if ((error = nfsspec_access(ap)) != 0) { 412 return (error); 413 } 414 /* 415 * Attempt to prevent a mapped root from accessing a file 416 * which it shouldn't. We try to read a byte from the file 417 * if the user is root and the file is not zero length. 418 * After calling nfsspec_access, we should have the correct 419 * file size cached. 420 */ 421 mtx_lock(&np->n_mtx); 422 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD) 423 && VTONFS(vp)->n_size > 0) { 424 struct iovec aiov; 425 struct uio auio; 426 char buf[1]; 427 428 mtx_unlock(&np->n_mtx); 429 aiov.iov_base = buf; 430 aiov.iov_len = 1; 431 auio.uio_iov = &aiov; 432 auio.uio_iovcnt = 1; 433 auio.uio_offset = 0; 434 auio.uio_resid = 1; 435 auio.uio_segflg = UIO_SYSSPACE; 436 auio.uio_rw = UIO_READ; 437 auio.uio_td = ap->a_td; 438 439 if (vp->v_type == VREG) 440 error = ncl_readrpc(vp, &auio, ap->a_cred); 441 else if (vp->v_type == VDIR) { 442 char* bp; 443 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); 444 aiov.iov_base = bp; 445 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; 446 error = ncl_readdirrpc(vp, &auio, ap->a_cred, 447 ap->a_td); 448 free(bp, M_TEMP); 449 } else if (vp->v_type == VLNK) 450 error = ncl_readlinkrpc(vp, &auio, ap->a_cred); 451 else 452 error = EACCES; 453 } else 454 mtx_unlock(&np->n_mtx); 455 return (error); 456 } 457 } 458 459 460 /* 461 * nfs open vnode op 462 * Check to see if the type is ok 463 * and that deletion is not in progress. 464 * For paged in text files, you will need to flush the page cache 465 * if consistency is lost. 466 */ 467 /* ARGSUSED */ 468 static int 469 nfs_open(struct vop_open_args *ap) 470 { 471 struct vnode *vp = ap->a_vp; 472 struct nfsnode *np = VTONFS(vp); 473 struct vattr vattr; 474 int error; 475 int fmode = ap->a_mode; 476 477 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) 478 return (EOPNOTSUPP); 479 480 /* 481 * For NFSv4, we need to do the Open Op before cache validation, 482 * so that we conform to RFC3530 Sec. 9.3.1. 483 */ 484 if (NFS_ISV4(vp)) { 485 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td); 486 if (error) { 487 error = nfscl_maperr(ap->a_td, error, (uid_t)0, 488 (gid_t)0); 489 return (error); 490 } 491 } 492 493 /* 494 * Now, if this Open will be doing reading, re-validate/flush the 495 * cache, so that Close/Open coherency is maintained. 496 */ 497 mtx_lock(&np->n_mtx); 498 if (np->n_flag & NMODIFIED) { 499 mtx_unlock(&np->n_mtx); 500 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 501 if (error == EINTR || error == EIO) { 502 if (NFS_ISV4(vp)) 503 (void) nfsrpc_close(vp, 0, ap->a_td); 504 return (error); 505 } 506 mtx_lock(&np->n_mtx); 507 np->n_attrstamp = 0; 508 if (vp->v_type == VDIR) 509 np->n_direofoffset = 0; 510 mtx_unlock(&np->n_mtx); 511 error = VOP_GETATTR(vp, &vattr, ap->a_cred); 512 if (error) { 513 if (NFS_ISV4(vp)) 514 (void) nfsrpc_close(vp, 0, ap->a_td); 515 return (error); 516 } 517 mtx_lock(&np->n_mtx); 518 np->n_mtime = vattr.va_mtime; 519 if (NFS_ISV4(vp)) 520 np->n_change = vattr.va_filerev; 521 } else { 522 mtx_unlock(&np->n_mtx); 523 error = VOP_GETATTR(vp, &vattr, ap->a_cred); 524 if (error) { 525 if (NFS_ISV4(vp)) 526 (void) nfsrpc_close(vp, 0, ap->a_td); 527 return (error); 528 } 529 mtx_lock(&np->n_mtx); 530 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) || 531 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { 532 if (vp->v_type == VDIR) 533 np->n_direofoffset = 0; 534 mtx_unlock(&np->n_mtx); 535 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 536 if (error == EINTR || error == EIO) { 537 if (NFS_ISV4(vp)) 538 (void) nfsrpc_close(vp, 0, ap->a_td); 539 return (error); 540 } 541 mtx_lock(&np->n_mtx); 542 np->n_mtime = vattr.va_mtime; 543 if (NFS_ISV4(vp)) 544 np->n_change = vattr.va_filerev; 545 } 546 } 547 548 /* 549 * If the object has >= 1 O_DIRECT active opens, we disable caching. 550 */ 551 if (newnfs_directio_enable && (fmode & O_DIRECT) && 552 (vp->v_type == VREG)) { 553 if (np->n_directio_opens == 0) { 554 mtx_unlock(&np->n_mtx); 555 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 556 if (error) { 557 if (NFS_ISV4(vp)) 558 (void) nfsrpc_close(vp, 0, ap->a_td); 559 return (error); 560 } 561 mtx_lock(&np->n_mtx); 562 np->n_flag |= NNONCACHE; 563 } 564 np->n_directio_opens++; 565 } 566 mtx_unlock(&np->n_mtx); 567 vnode_create_vobject(vp, vattr.va_size, ap->a_td); 568 return (0); 569 } 570 571 /* 572 * nfs close vnode op 573 * What an NFS client should do upon close after writing is a debatable issue. 574 * Most NFS clients push delayed writes to the server upon close, basically for 575 * two reasons: 576 * 1 - So that any write errors may be reported back to the client process 577 * doing the close system call. By far the two most likely errors are 578 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 579 * 2 - To put a worst case upper bound on cache inconsistency between 580 * multiple clients for the file. 581 * There is also a consistency problem for Version 2 of the protocol w.r.t. 582 * not being able to tell if other clients are writing a file concurrently, 583 * since there is no way of knowing if the changed modify time in the reply 584 * is only due to the write for this client. 585 * (NFS Version 3 provides weak cache consistency data in the reply that 586 * should be sufficient to detect and handle this case.) 587 * 588 * The current code does the following: 589 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 590 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 591 * or commit them (this satisfies 1 and 2 except for the 592 * case where the server crashes after this close but 593 * before the commit RPC, which is felt to be "good 594 * enough". Changing the last argument to ncl_flush() to 595 * a 1 would force a commit operation, if it is felt a 596 * commit is necessary now. 597 * for NFS Version 4 - flush the dirty buffers and commit them, if 598 * nfscl_mustflush() says this is necessary. 599 * It is necessary if there is no write delegation held, 600 * in order to satisfy open/close coherency. 601 * If the file isn't cached on local stable storage, 602 * it may be necessary in order to detect "out of space" 603 * errors from the server, if the write delegation 604 * issued by the server doesn't allow the file to grow. 605 */ 606 /* ARGSUSED */ 607 static int 608 nfs_close(struct vop_close_args *ap) 609 { 610 struct vnode *vp = ap->a_vp; 611 struct nfsnode *np = VTONFS(vp); 612 struct nfsvattr nfsva; 613 struct ucred *cred; 614 int error = 0, ret, localcred = 0; 615 int fmode = ap->a_fflag; 616 617 if ((vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF)) 618 return (0); 619 /* 620 * During shutdown, a_cred isn't valid, so just use root. 621 */ 622 if (ap->a_cred == NOCRED) { 623 cred = newnfs_getcred(); 624 localcred = 1; 625 } else { 626 cred = ap->a_cred; 627 } 628 if (vp->v_type == VREG) { 629 /* 630 * Examine and clean dirty pages, regardless of NMODIFIED. 631 * This closes a major hole in close-to-open consistency. 632 * We want to push out all dirty pages (and buffers) on 633 * close, regardless of whether they were dirtied by 634 * mmap'ed writes or via write(). 635 */ 636 if (nfs_clean_pages_on_close && vp->v_object) { 637 VM_OBJECT_LOCK(vp->v_object); 638 vm_object_page_clean(vp->v_object, 0, 0, 0); 639 VM_OBJECT_UNLOCK(vp->v_object); 640 } 641 mtx_lock(&np->n_mtx); 642 if (np->n_flag & NMODIFIED) { 643 mtx_unlock(&np->n_mtx); 644 if (NFS_ISV3(vp)) { 645 /* 646 * Under NFSv3 we have dirty buffers to dispose of. We 647 * must flush them to the NFS server. We have the option 648 * of waiting all the way through the commit rpc or just 649 * waiting for the initial write. The default is to only 650 * wait through the initial write so the data is in the 651 * server's cache, which is roughly similar to the state 652 * a standard disk subsystem leaves the file in on close(). 653 * 654 * We cannot clear the NMODIFIED bit in np->n_flag due to 655 * potential races with other processes, and certainly 656 * cannot clear it if we don't commit. 657 * These races occur when there is no longer the old 658 * traditional vnode locking implemented for Vnode Ops. 659 */ 660 int cm = newnfs_commit_on_close ? 1 : 0; 661 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm, 0); 662 /* np->n_flag &= ~NMODIFIED; */ 663 } else if (NFS_ISV4(vp)) { 664 if (nfscl_mustflush(vp) != 0) { 665 int cm = newnfs_commit_on_close ? 1 : 0; 666 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, 667 cm, 0); 668 /* 669 * as above w.r.t races when clearing 670 * NMODIFIED. 671 * np->n_flag &= ~NMODIFIED; 672 */ 673 } 674 } else 675 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); 676 mtx_lock(&np->n_mtx); 677 } 678 /* 679 * Invalidate the attribute cache in all cases. 680 * An open is going to fetch fresh attrs any way, other procs 681 * on this node that have file open will be forced to do an 682 * otw attr fetch, but this is safe. 683 * --> A user found that their RPC count dropped by 20% when 684 * this was commented out and I can't see any requirement 685 * for it, so I've disabled it when negative lookups are 686 * enabled. (What does this have to do with negative lookup 687 * caching? Well nothing, except it was reported by the 688 * same user that needed negative lookup caching and I wanted 689 * there to be a way to disable it to see if it 690 * is the cause of some caching/coherency issue that might 691 * crop up.) 692 */ 693 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) 694 np->n_attrstamp = 0; 695 if (np->n_flag & NWRITEERR) { 696 np->n_flag &= ~NWRITEERR; 697 error = np->n_error; 698 } 699 mtx_unlock(&np->n_mtx); 700 } 701 702 if (NFS_ISV4(vp)) { 703 /* 704 * Get attributes so "change" is up to date. 705 */ 706 if (error == 0 && nfscl_mustflush(vp) != 0) { 707 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva, 708 NULL); 709 if (!ret) { 710 np->n_change = nfsva.na_filerev; 711 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, 712 NULL, 0, 0); 713 } 714 } 715 716 /* 717 * and do the close. 718 */ 719 ret = nfsrpc_close(vp, 0, ap->a_td); 720 if (!error && ret) 721 error = ret; 722 if (error) 723 error = nfscl_maperr(ap->a_td, error, (uid_t)0, 724 (gid_t)0); 725 } 726 if (newnfs_directio_enable) 727 KASSERT((np->n_directio_asyncwr == 0), 728 ("nfs_close: dirty unflushed (%d) directio buffers\n", 729 np->n_directio_asyncwr)); 730 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) { 731 mtx_lock(&np->n_mtx); 732 KASSERT((np->n_directio_opens > 0), 733 ("nfs_close: unexpectedly value (0) of n_directio_opens\n")); 734 np->n_directio_opens--; 735 if (np->n_directio_opens == 0) 736 np->n_flag &= ~NNONCACHE; 737 mtx_unlock(&np->n_mtx); 738 } 739 if (localcred) 740 NFSFREECRED(cred); 741 return (error); 742 } 743 744 /* 745 * nfs getattr call from vfs. 746 */ 747 static int 748 nfs_getattr(struct vop_getattr_args *ap) 749 { 750 struct vnode *vp = ap->a_vp; 751 struct thread *td = curthread; /* XXX */ 752 struct nfsnode *np = VTONFS(vp); 753 int error = 0; 754 struct nfsvattr nfsva; 755 struct vattr *vap = ap->a_vap; 756 struct vattr vattr; 757 758 /* 759 * Update local times for special files. 760 */ 761 mtx_lock(&np->n_mtx); 762 if (np->n_flag & (NACC | NUPD)) 763 np->n_flag |= NCHG; 764 mtx_unlock(&np->n_mtx); 765 /* 766 * First look in the cache. 767 */ 768 if (ncl_getattrcache(vp, &vattr) == 0) { 769 vap->va_type = vattr.va_type; 770 vap->va_mode = vattr.va_mode; 771 vap->va_nlink = vattr.va_nlink; 772 vap->va_uid = vattr.va_uid; 773 vap->va_gid = vattr.va_gid; 774 vap->va_fsid = vattr.va_fsid; 775 vap->va_fileid = vattr.va_fileid; 776 vap->va_size = vattr.va_size; 777 vap->va_blocksize = vattr.va_blocksize; 778 vap->va_atime = vattr.va_atime; 779 vap->va_mtime = vattr.va_mtime; 780 vap->va_ctime = vattr.va_ctime; 781 vap->va_gen = vattr.va_gen; 782 vap->va_flags = vattr.va_flags; 783 vap->va_rdev = vattr.va_rdev; 784 vap->va_bytes = vattr.va_bytes; 785 vap->va_filerev = vattr.va_filerev; 786 /* 787 * Get the local modify time for the case of a write 788 * delegation. 789 */ 790 nfscl_deleggetmodtime(vp, &vap->va_mtime); 791 return (0); 792 } 793 794 if (NFS_ISV34(vp) && nfs_prime_access_cache && 795 nfsaccess_cache_timeout > 0) { 796 NFSINCRGLOBAL(newnfsstats.accesscache_misses); 797 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL); 798 if (ncl_getattrcache(vp, ap->a_vap) == 0) { 799 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime); 800 return (0); 801 } 802 } 803 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL); 804 if (!error) 805 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0); 806 if (!error) { 807 /* 808 * Get the local modify time for the case of a write 809 * delegation. 810 */ 811 nfscl_deleggetmodtime(vp, &vap->va_mtime); 812 } else if (NFS_ISV4(vp)) { 813 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 814 } 815 return (error); 816 } 817 818 /* 819 * nfs setattr call. 820 */ 821 static int 822 nfs_setattr(struct vop_setattr_args *ap) 823 { 824 struct vnode *vp = ap->a_vp; 825 struct nfsnode *np = VTONFS(vp); 826 struct thread *td = curthread; /* XXX */ 827 struct vattr *vap = ap->a_vap; 828 int error = 0; 829 u_quad_t tsize; 830 831 #ifndef nolint 832 tsize = (u_quad_t)0; 833 #endif 834 835 /* 836 * Setting of flags and marking of atimes are not supported. 837 */ 838 if (vap->va_flags != VNOVAL) 839 return (EOPNOTSUPP); 840 841 /* 842 * Disallow write attempts if the filesystem is mounted read-only. 843 */ 844 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 845 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 846 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 847 (vp->v_mount->mnt_flag & MNT_RDONLY)) 848 return (EROFS); 849 if (vap->va_size != VNOVAL) { 850 switch (vp->v_type) { 851 case VDIR: 852 return (EISDIR); 853 case VCHR: 854 case VBLK: 855 case VSOCK: 856 case VFIFO: 857 if (vap->va_mtime.tv_sec == VNOVAL && 858 vap->va_atime.tv_sec == VNOVAL && 859 vap->va_mode == (mode_t)VNOVAL && 860 vap->va_uid == (uid_t)VNOVAL && 861 vap->va_gid == (gid_t)VNOVAL) 862 return (0); 863 vap->va_size = VNOVAL; 864 break; 865 default: 866 /* 867 * Disallow write attempts if the filesystem is 868 * mounted read-only. 869 */ 870 if (vp->v_mount->mnt_flag & MNT_RDONLY) 871 return (EROFS); 872 /* 873 * We run vnode_pager_setsize() early (why?), 874 * we must set np->n_size now to avoid vinvalbuf 875 * V_SAVE races that might setsize a lower 876 * value. 877 */ 878 mtx_lock(&np->n_mtx); 879 tsize = np->n_size; 880 mtx_unlock(&np->n_mtx); 881 error = ncl_meta_setsize(vp, ap->a_cred, td, 882 vap->va_size); 883 mtx_lock(&np->n_mtx); 884 if (np->n_flag & NMODIFIED) { 885 tsize = np->n_size; 886 mtx_unlock(&np->n_mtx); 887 if (vap->va_size == 0) 888 error = ncl_vinvalbuf(vp, 0, td, 1); 889 else 890 error = ncl_vinvalbuf(vp, V_SAVE, td, 1); 891 if (error) { 892 vnode_pager_setsize(vp, tsize); 893 return (error); 894 } 895 /* 896 * Call nfscl_delegmodtime() to set the modify time 897 * locally, as required. 898 */ 899 nfscl_delegmodtime(vp); 900 } else 901 mtx_unlock(&np->n_mtx); 902 /* 903 * np->n_size has already been set to vap->va_size 904 * in ncl_meta_setsize(). We must set it again since 905 * nfs_loadattrcache() could be called through 906 * ncl_meta_setsize() and could modify np->n_size. 907 */ 908 mtx_lock(&np->n_mtx); 909 np->n_vattr.na_size = np->n_size = vap->va_size; 910 mtx_unlock(&np->n_mtx); 911 }; 912 } else { 913 mtx_lock(&np->n_mtx); 914 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) && 915 (np->n_flag & NMODIFIED) && vp->v_type == VREG) { 916 mtx_unlock(&np->n_mtx); 917 if ((error = ncl_vinvalbuf(vp, V_SAVE, td, 1)) != 0 && 918 (error == EINTR || error == EIO)) 919 return (error); 920 } else 921 mtx_unlock(&np->n_mtx); 922 } 923 error = nfs_setattrrpc(vp, vap, ap->a_cred, td); 924 if (error && vap->va_size != VNOVAL) { 925 mtx_lock(&np->n_mtx); 926 np->n_size = np->n_vattr.na_size = tsize; 927 vnode_pager_setsize(vp, tsize); 928 mtx_unlock(&np->n_mtx); 929 } 930 return (error); 931 } 932 933 /* 934 * Do an nfs setattr rpc. 935 */ 936 static int 937 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred, 938 struct thread *td) 939 { 940 struct nfsnode *np = VTONFS(vp); 941 int error, ret, attrflag, i; 942 struct nfsvattr nfsva; 943 944 if (NFS_ISV34(vp)) { 945 mtx_lock(&np->n_mtx); 946 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) 947 np->n_accesscache[i].stamp = 0; 948 np->n_flag |= NDELEGMOD; 949 mtx_unlock(&np->n_mtx); 950 } 951 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag, 952 NULL); 953 if (attrflag) { 954 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 955 if (ret && !error) 956 error = ret; 957 } 958 if (error && NFS_ISV4(vp)) 959 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid); 960 return (error); 961 } 962 963 /* 964 * nfs lookup call, one step at a time... 965 * First look in cache 966 * If not found, unlock the directory nfsnode and do the rpc 967 */ 968 static int 969 nfs_lookup(struct vop_lookup_args *ap) 970 { 971 struct componentname *cnp = ap->a_cnp; 972 struct vnode *dvp = ap->a_dvp; 973 struct vnode **vpp = ap->a_vpp; 974 struct mount *mp = dvp->v_mount; 975 int flags = cnp->cn_flags; 976 struct vnode *newvp; 977 struct nfsmount *nmp; 978 struct nfsnode *np, *newnp; 979 int error = 0, attrflag, dattrflag, ltype; 980 struct thread *td = cnp->cn_thread; 981 struct nfsfh *nfhp; 982 struct nfsvattr dnfsva, nfsva; 983 struct vattr vattr; 984 struct timespec dmtime; 985 986 *vpp = NULLVP; 987 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) && 988 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 989 return (EROFS); 990 if (dvp->v_type != VDIR) 991 return (ENOTDIR); 992 nmp = VFSTONFS(mp); 993 np = VTONFS(dvp); 994 995 /* For NFSv4, wait until any remove is done. */ 996 mtx_lock(&np->n_mtx); 997 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) { 998 np->n_flag |= NREMOVEWANT; 999 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0); 1000 } 1001 mtx_unlock(&np->n_mtx); 1002 1003 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) 1004 return (error); 1005 error = cache_lookup(dvp, vpp, cnp); 1006 if (error > 0 && error != ENOENT) 1007 return (error); 1008 if (error == -1) { 1009 /* 1010 * We only accept a positive hit in the cache if the 1011 * change time of the file matches our cached copy. 1012 * Otherwise, we discard the cache entry and fallback 1013 * to doing a lookup RPC. 1014 * 1015 * To better handle stale file handles and attributes, 1016 * clear the attribute cache of this node if it is a 1017 * leaf component, part of an open() call, and not 1018 * locally modified before fetching the attributes. 1019 * This should allow stale file handles to be detected 1020 * here where we can fall back to a LOOKUP RPC to 1021 * recover rather than having nfs_open() detect the 1022 * stale file handle and failing open(2) with ESTALE. 1023 */ 1024 newvp = *vpp; 1025 newnp = VTONFS(newvp); 1026 if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) && 1027 !(newnp->n_flag & NMODIFIED)) { 1028 mtx_lock(&newnp->n_mtx); 1029 newnp->n_attrstamp = 0; 1030 mtx_unlock(&newnp->n_mtx); 1031 } 1032 if (nfscl_nodeleg(newvp, 0) == 0 || 1033 (VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 && 1034 timespeccmp(&vattr.va_ctime, &newnp->n_ctime, ==))) { 1035 NFSINCRGLOBAL(newnfsstats.lookupcache_hits); 1036 if (cnp->cn_nameiop != LOOKUP && 1037 (flags & ISLASTCN)) 1038 cnp->cn_flags |= SAVENAME; 1039 return (0); 1040 } 1041 cache_purge(newvp); 1042 if (dvp != newvp) 1043 vput(newvp); 1044 else 1045 vrele(newvp); 1046 *vpp = NULLVP; 1047 } else if (error == ENOENT) { 1048 if (dvp->v_iflag & VI_DOOMED) 1049 return (ENOENT); 1050 /* 1051 * We only accept a negative hit in the cache if the 1052 * modification time of the parent directory matches 1053 * our cached copy. Otherwise, we discard all of the 1054 * negative cache entries for this directory. We also 1055 * only trust -ve cache entries for less than 1056 * nm_negative_namecache_timeout seconds. 1057 */ 1058 if ((u_int)(ticks - np->n_dmtime_ticks) < 1059 (nmp->nm_negnametimeo * hz) && 1060 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 && 1061 timespeccmp(&vattr.va_mtime, &np->n_dmtime, ==)) { 1062 NFSINCRGLOBAL(newnfsstats.lookupcache_hits); 1063 return (ENOENT); 1064 } 1065 cache_purge_negative(dvp); 1066 mtx_lock(&np->n_mtx); 1067 timespecclear(&np->n_dmtime); 1068 mtx_unlock(&np->n_mtx); 1069 } 1070 1071 /* 1072 * Cache the modification time of the parent directory in case 1073 * the lookup fails and results in adding the first negative 1074 * name cache entry for the directory. Since this is reading 1075 * a single time_t, don't bother with locking. The 1076 * modification time may be a bit stale, but it must be read 1077 * before performing the lookup RPC to prevent a race where 1078 * another lookup updates the timestamp on the directory after 1079 * the lookup RPC has been performed on the server but before 1080 * n_dmtime is set at the end of this function. 1081 */ 1082 dmtime = np->n_vattr.na_mtime; 1083 error = 0; 1084 newvp = NULLVP; 1085 NFSINCRGLOBAL(newnfsstats.lookupcache_misses); 1086 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1087 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 1088 NULL); 1089 if (dattrflag) 1090 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); 1091 if (error) { 1092 if (newvp != NULLVP) { 1093 vput(newvp); 1094 *vpp = NULLVP; 1095 } 1096 1097 if (error != ENOENT) { 1098 if (NFS_ISV4(dvp)) 1099 error = nfscl_maperr(td, error, (uid_t)0, 1100 (gid_t)0); 1101 return (error); 1102 } 1103 1104 /* The requested file was not found. */ 1105 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1106 (flags & ISLASTCN)) { 1107 /* 1108 * XXX: UFS does a full VOP_ACCESS(dvp, 1109 * VWRITE) here instead of just checking 1110 * MNT_RDONLY. 1111 */ 1112 if (mp->mnt_flag & MNT_RDONLY) 1113 return (EROFS); 1114 cnp->cn_flags |= SAVENAME; 1115 return (EJUSTRETURN); 1116 } 1117 1118 if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) { 1119 /* 1120 * Maintain n_dmtime as the modification time 1121 * of the parent directory when the oldest -ve 1122 * name cache entry for this directory was 1123 * added. If a -ve cache entry has already 1124 * been added with a newer modification time 1125 * by a concurrent lookup, then don't bother 1126 * adding a cache entry. The modification 1127 * time of the directory might have changed 1128 * due to the file this lookup failed to find 1129 * being created. In that case a subsequent 1130 * lookup would incorrectly use the entry 1131 * added here instead of doing an extra 1132 * lookup. 1133 */ 1134 mtx_lock(&np->n_mtx); 1135 if (timespeccmp(&np->n_dmtime, &dmtime, <=)) { 1136 if (!timespecisset(&np->n_dmtime)) { 1137 np->n_dmtime = dmtime; 1138 np->n_dmtime_ticks = ticks; 1139 } 1140 mtx_unlock(&np->n_mtx); 1141 cache_enter(dvp, NULL, cnp); 1142 } else 1143 mtx_unlock(&np->n_mtx); 1144 } 1145 return (ENOENT); 1146 } 1147 1148 /* 1149 * Handle RENAME case... 1150 */ 1151 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { 1152 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { 1153 FREE((caddr_t)nfhp, M_NFSFH); 1154 return (EISDIR); 1155 } 1156 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL); 1157 if (error) 1158 return (error); 1159 newvp = NFSTOV(np); 1160 if (attrflag) 1161 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, 1162 0, 1); 1163 *vpp = newvp; 1164 cnp->cn_flags |= SAVENAME; 1165 return (0); 1166 } 1167 1168 if (flags & ISDOTDOT) { 1169 ltype = VOP_ISLOCKED(dvp); 1170 error = vfs_busy(mp, MBF_NOWAIT); 1171 if (error != 0) { 1172 vfs_ref(mp); 1173 VOP_UNLOCK(dvp, 0); 1174 error = vfs_busy(mp, 0); 1175 vn_lock(dvp, ltype | LK_RETRY); 1176 vfs_rel(mp); 1177 if (error == 0 && (dvp->v_iflag & VI_DOOMED)) { 1178 vfs_unbusy(mp); 1179 error = ENOENT; 1180 } 1181 if (error != 0) 1182 return (error); 1183 } 1184 VOP_UNLOCK(dvp, 0); 1185 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL); 1186 if (error == 0) 1187 newvp = NFSTOV(np); 1188 vfs_unbusy(mp); 1189 if (newvp != dvp) 1190 vn_lock(dvp, ltype | LK_RETRY); 1191 if (dvp->v_iflag & VI_DOOMED) { 1192 if (error == 0) { 1193 if (newvp == dvp) 1194 vrele(newvp); 1195 else 1196 vput(newvp); 1197 } 1198 error = ENOENT; 1199 } 1200 if (error != 0) 1201 return (error); 1202 if (attrflag) 1203 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, 1204 0, 1); 1205 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { 1206 FREE((caddr_t)nfhp, M_NFSFH); 1207 VREF(dvp); 1208 newvp = dvp; 1209 if (attrflag) 1210 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, 1211 0, 1); 1212 } else { 1213 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL); 1214 if (error) 1215 return (error); 1216 newvp = NFSTOV(np); 1217 if (attrflag) 1218 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, 1219 0, 1); 1220 else if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) && 1221 !(np->n_flag & NMODIFIED)) { 1222 /* 1223 * Flush the attribute cache when opening a 1224 * leaf node to ensure that fresh attributes 1225 * are fetched in nfs_open() since we did not 1226 * fetch attributes from the LOOKUP reply. 1227 */ 1228 mtx_lock(&np->n_mtx); 1229 np->n_attrstamp = 0; 1230 mtx_unlock(&np->n_mtx); 1231 } 1232 } 1233 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1234 cnp->cn_flags |= SAVENAME; 1235 if ((cnp->cn_flags & MAKEENTRY) && 1236 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1237 np->n_ctime = np->n_vattr.na_vattr.va_ctime; 1238 cache_enter(dvp, newvp, cnp); 1239 } 1240 *vpp = newvp; 1241 return (0); 1242 } 1243 1244 /* 1245 * nfs read call. 1246 * Just call ncl_bioread() to do the work. 1247 */ 1248 static int 1249 nfs_read(struct vop_read_args *ap) 1250 { 1251 struct vnode *vp = ap->a_vp; 1252 1253 switch (vp->v_type) { 1254 case VREG: 1255 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 1256 case VDIR: 1257 return (EISDIR); 1258 default: 1259 return (EOPNOTSUPP); 1260 } 1261 } 1262 1263 /* 1264 * nfs readlink call 1265 */ 1266 static int 1267 nfs_readlink(struct vop_readlink_args *ap) 1268 { 1269 struct vnode *vp = ap->a_vp; 1270 1271 if (vp->v_type != VLNK) 1272 return (EINVAL); 1273 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred)); 1274 } 1275 1276 /* 1277 * Do a readlink rpc. 1278 * Called by ncl_doio() from below the buffer cache. 1279 */ 1280 int 1281 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1282 { 1283 int error, ret, attrflag; 1284 struct nfsvattr nfsva; 1285 1286 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva, 1287 &attrflag, NULL); 1288 if (attrflag) { 1289 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 1290 if (ret && !error) 1291 error = ret; 1292 } 1293 if (error && NFS_ISV4(vp)) 1294 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1295 return (error); 1296 } 1297 1298 /* 1299 * nfs read rpc call 1300 * Ditto above 1301 */ 1302 int 1303 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) 1304 { 1305 int error, ret, attrflag; 1306 struct nfsvattr nfsva; 1307 1308 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, &attrflag, 1309 NULL); 1310 if (attrflag) { 1311 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 1312 if (ret && !error) 1313 error = ret; 1314 } 1315 if (error && NFS_ISV4(vp)) 1316 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1317 return (error); 1318 } 1319 1320 /* 1321 * nfs write call 1322 */ 1323 int 1324 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 1325 int *iomode, int *must_commit, int called_from_strategy) 1326 { 1327 struct nfsvattr nfsva; 1328 int error = 0, attrflag, ret; 1329 u_char verf[NFSX_VERF]; 1330 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1331 1332 *must_commit = 0; 1333 error = nfsrpc_write(vp, uiop, iomode, verf, cred, 1334 uiop->uio_td, &nfsva, &attrflag, NULL, called_from_strategy); 1335 NFSLOCKMNT(nmp); 1336 if (!error && NFSHASWRITEVERF(nmp) && 1337 NFSBCMP(verf, nmp->nm_verf, NFSX_VERF)) { 1338 *must_commit = 1; 1339 NFSBCOPY(verf, nmp->nm_verf, NFSX_VERF); 1340 } 1341 NFSUNLOCKMNT(nmp); 1342 if (attrflag) { 1343 if (VTONFS(vp)->n_flag & ND_NFSV4) 1344 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1, 1345 1); 1346 else 1347 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1348 1); 1349 if (ret && !error) 1350 error = ret; 1351 } 1352 if (vp->v_mount->mnt_kern_flag & MNTK_ASYNC) 1353 *iomode = NFSWRITE_FILESYNC; 1354 if (error && NFS_ISV4(vp)) 1355 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); 1356 return (error); 1357 } 1358 1359 /* 1360 * nfs mknod rpc 1361 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1362 * mode set to specify the file type and the size field for rdev. 1363 */ 1364 static int 1365 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, 1366 struct vattr *vap) 1367 { 1368 struct nfsvattr nfsva, dnfsva; 1369 struct vnode *newvp = NULL; 1370 struct nfsnode *np = NULL, *dnp; 1371 struct nfsfh *nfhp; 1372 struct vattr vattr; 1373 int error = 0, attrflag, dattrflag; 1374 u_int32_t rdev; 1375 1376 if (vap->va_type == VCHR || vap->va_type == VBLK) 1377 rdev = vap->va_rdev; 1378 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1379 rdev = 0xffffffff; 1380 else 1381 return (EOPNOTSUPP); 1382 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1383 return (error); 1384 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap, 1385 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva, 1386 &nfsva, &nfhp, &attrflag, &dattrflag, NULL); 1387 if (!error) { 1388 if (!nfhp) 1389 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, 1390 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread, 1391 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 1392 NULL); 1393 if (nfhp) 1394 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, 1395 cnp->cn_thread, &np, NULL); 1396 } 1397 if (dattrflag) 1398 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); 1399 if (!error) { 1400 newvp = NFSTOV(np); 1401 if (attrflag) 1402 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, 1403 0, 1); 1404 } 1405 if (!error) { 1406 if ((cnp->cn_flags & MAKEENTRY)) 1407 cache_enter(dvp, newvp, cnp); 1408 *vpp = newvp; 1409 } else if (NFS_ISV4(dvp)) { 1410 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid, 1411 vap->va_gid); 1412 } 1413 dnp = VTONFS(dvp); 1414 mtx_lock(&dnp->n_mtx); 1415 dnp->n_flag |= NMODIFIED; 1416 if (!dattrflag) 1417 dnp->n_attrstamp = 0; 1418 mtx_unlock(&dnp->n_mtx); 1419 return (error); 1420 } 1421 1422 /* 1423 * nfs mknod vop 1424 * just call nfs_mknodrpc() to do the work. 1425 */ 1426 /* ARGSUSED */ 1427 static int 1428 nfs_mknod(struct vop_mknod_args *ap) 1429 { 1430 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap)); 1431 } 1432 1433 static struct mtx nfs_cverf_mtx; 1434 MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex", 1435 MTX_DEF); 1436 1437 static nfsquad_t 1438 nfs_get_cverf(void) 1439 { 1440 static nfsquad_t cverf; 1441 nfsquad_t ret; 1442 static int cverf_initialized = 0; 1443 1444 mtx_lock(&nfs_cverf_mtx); 1445 if (cverf_initialized == 0) { 1446 cverf.lval[0] = arc4random(); 1447 cverf.lval[1] = arc4random(); 1448 cverf_initialized = 1; 1449 } else 1450 cverf.qval++; 1451 ret = cverf; 1452 mtx_unlock(&nfs_cverf_mtx); 1453 1454 return (ret); 1455 } 1456 1457 /* 1458 * nfs file create call 1459 */ 1460 static int 1461 nfs_create(struct vop_create_args *ap) 1462 { 1463 struct vnode *dvp = ap->a_dvp; 1464 struct vattr *vap = ap->a_vap; 1465 struct componentname *cnp = ap->a_cnp; 1466 struct nfsnode *np = NULL, *dnp; 1467 struct vnode *newvp = NULL; 1468 struct nfsmount *nmp; 1469 struct nfsvattr dnfsva, nfsva; 1470 struct nfsfh *nfhp; 1471 nfsquad_t cverf; 1472 int error = 0, attrflag, dattrflag, fmode = 0; 1473 struct vattr vattr; 1474 1475 /* 1476 * Oops, not for me.. 1477 */ 1478 if (vap->va_type == VSOCK) 1479 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1480 1481 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1482 return (error); 1483 if (vap->va_vaflags & VA_EXCLUSIVE) 1484 fmode |= O_EXCL; 1485 dnp = VTONFS(dvp); 1486 nmp = VFSTONFS(vnode_mount(dvp)); 1487 again: 1488 /* For NFSv4, wait until any remove is done. */ 1489 mtx_lock(&dnp->n_mtx); 1490 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) { 1491 dnp->n_flag |= NREMOVEWANT; 1492 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0); 1493 } 1494 mtx_unlock(&dnp->n_mtx); 1495 1496 cverf = nfs_get_cverf(); 1497 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1498 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, 1499 &nfhp, &attrflag, &dattrflag, NULL); 1500 if (!error) { 1501 if (nfhp == NULL) 1502 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, 1503 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread, 1504 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 1505 NULL); 1506 if (nfhp != NULL) 1507 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, 1508 cnp->cn_thread, &np, NULL); 1509 } 1510 if (dattrflag) 1511 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); 1512 if (!error) { 1513 newvp = NFSTOV(np); 1514 if (attrflag) 1515 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, 1516 0, 1); 1517 } 1518 if (error) { 1519 if (newvp != NULL) { 1520 vrele(newvp); 1521 newvp = NULL; 1522 } 1523 if (NFS_ISV34(dvp) && (fmode & O_EXCL) && 1524 error == NFSERR_NOTSUPP) { 1525 fmode &= ~O_EXCL; 1526 goto again; 1527 } 1528 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) { 1529 if (nfscl_checksattr(vap, &nfsva)) { 1530 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred, 1531 cnp->cn_thread, &nfsva, &attrflag, NULL); 1532 if (error && (vap->va_uid != (uid_t)VNOVAL || 1533 vap->va_gid != (gid_t)VNOVAL)) { 1534 /* try again without setting uid/gid */ 1535 vap->va_uid = (uid_t)VNOVAL; 1536 vap->va_gid = (uid_t)VNOVAL; 1537 error = nfsrpc_setattr(newvp, vap, NULL, 1538 cnp->cn_cred, cnp->cn_thread, &nfsva, 1539 &attrflag, NULL); 1540 } 1541 if (attrflag) 1542 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 1543 NULL, 0, 1); 1544 } 1545 } 1546 if (!error) { 1547 if (cnp->cn_flags & MAKEENTRY) 1548 cache_enter(dvp, newvp, cnp); 1549 *ap->a_vpp = newvp; 1550 } else if (NFS_ISV4(dvp)) { 1551 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid, 1552 vap->va_gid); 1553 } 1554 mtx_lock(&dnp->n_mtx); 1555 dnp->n_flag |= NMODIFIED; 1556 if (!dattrflag) 1557 dnp->n_attrstamp = 0; 1558 mtx_unlock(&dnp->n_mtx); 1559 return (error); 1560 } 1561 1562 /* 1563 * nfs file remove call 1564 * To try and make nfs semantics closer to ufs semantics, a file that has 1565 * other processes using the vnode is renamed instead of removed and then 1566 * removed later on the last close. 1567 * - If v_usecount > 1 1568 * If a rename is not already in the works 1569 * call nfs_sillyrename() to set it up 1570 * else 1571 * do the remove rpc 1572 */ 1573 static int 1574 nfs_remove(struct vop_remove_args *ap) 1575 { 1576 struct vnode *vp = ap->a_vp; 1577 struct vnode *dvp = ap->a_dvp; 1578 struct componentname *cnp = ap->a_cnp; 1579 struct nfsnode *np = VTONFS(vp); 1580 int error = 0; 1581 struct vattr vattr; 1582 1583 KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name")); 1584 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount")); 1585 if (vp->v_type == VDIR) 1586 error = EPERM; 1587 else if (vrefcnt(vp) == 1 || (np->n_sillyrename && 1588 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && 1589 vattr.va_nlink > 1)) { 1590 /* 1591 * Purge the name cache so that the chance of a lookup for 1592 * the name succeeding while the remove is in progress is 1593 * minimized. Without node locking it can still happen, such 1594 * that an I/O op returns ESTALE, but since you get this if 1595 * another host removes the file.. 1596 */ 1597 cache_purge(vp); 1598 /* 1599 * throw away biocache buffers, mainly to avoid 1600 * unnecessary delayed writes later. 1601 */ 1602 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1); 1603 /* Do the rpc */ 1604 if (error != EINTR && error != EIO) 1605 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr, 1606 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread); 1607 /* 1608 * Kludge City: If the first reply to the remove rpc is lost.. 1609 * the reply to the retransmitted request will be ENOENT 1610 * since the file was in fact removed 1611 * Therefore, we cheat and return success. 1612 */ 1613 if (error == ENOENT) 1614 error = 0; 1615 } else if (!np->n_sillyrename) 1616 error = nfs_sillyrename(dvp, vp, cnp); 1617 np->n_attrstamp = 0; 1618 return (error); 1619 } 1620 1621 /* 1622 * nfs file remove rpc called from nfs_inactive 1623 */ 1624 int 1625 ncl_removeit(struct sillyrename *sp, struct vnode *vp) 1626 { 1627 /* 1628 * Make sure that the directory vnode is still valid. 1629 * XXX we should lock sp->s_dvp here. 1630 */ 1631 if (sp->s_dvp->v_type == VBAD) 1632 return (0); 1633 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen, 1634 sp->s_cred, NULL)); 1635 } 1636 1637 /* 1638 * Nfs remove rpc, called from nfs_remove() and ncl_removeit(). 1639 */ 1640 static int 1641 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, 1642 int namelen, struct ucred *cred, struct thread *td) 1643 { 1644 struct nfsvattr dnfsva; 1645 struct nfsnode *dnp = VTONFS(dvp); 1646 int error = 0, dattrflag; 1647 1648 mtx_lock(&dnp->n_mtx); 1649 dnp->n_flag |= NREMOVEINPROG; 1650 mtx_unlock(&dnp->n_mtx); 1651 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva, 1652 &dattrflag, NULL); 1653 mtx_lock(&dnp->n_mtx); 1654 if ((dnp->n_flag & NREMOVEWANT)) { 1655 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG); 1656 mtx_unlock(&dnp->n_mtx); 1657 wakeup((caddr_t)dnp); 1658 } else { 1659 dnp->n_flag &= ~NREMOVEINPROG; 1660 mtx_unlock(&dnp->n_mtx); 1661 } 1662 if (dattrflag) 1663 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); 1664 mtx_lock(&dnp->n_mtx); 1665 dnp->n_flag |= NMODIFIED; 1666 if (!dattrflag) 1667 dnp->n_attrstamp = 0; 1668 mtx_unlock(&dnp->n_mtx); 1669 if (error && NFS_ISV4(dvp)) 1670 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1671 return (error); 1672 } 1673 1674 /* 1675 * nfs file rename call 1676 */ 1677 static int 1678 nfs_rename(struct vop_rename_args *ap) 1679 { 1680 struct vnode *fvp = ap->a_fvp; 1681 struct vnode *tvp = ap->a_tvp; 1682 struct vnode *fdvp = ap->a_fdvp; 1683 struct vnode *tdvp = ap->a_tdvp; 1684 struct componentname *tcnp = ap->a_tcnp; 1685 struct componentname *fcnp = ap->a_fcnp; 1686 struct nfsnode *fnp = VTONFS(ap->a_fvp); 1687 struct nfsnode *tdnp = VTONFS(ap->a_tdvp); 1688 struct nfsv4node *newv4 = NULL; 1689 int error; 1690 1691 KASSERT((tcnp->cn_flags & HASBUF) != 0 && 1692 (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name")); 1693 /* Check for cross-device rename */ 1694 if ((fvp->v_mount != tdvp->v_mount) || 1695 (tvp && (fvp->v_mount != tvp->v_mount))) { 1696 error = EXDEV; 1697 goto out; 1698 } 1699 1700 if (fvp == tvp) { 1701 ncl_printf("nfs_rename: fvp == tvp (can't happen)\n"); 1702 error = 0; 1703 goto out; 1704 } 1705 if ((error = vn_lock(fvp, LK_EXCLUSIVE))) 1706 goto out; 1707 1708 /* 1709 * We have to flush B_DELWRI data prior to renaming 1710 * the file. If we don't, the delayed-write buffers 1711 * can be flushed out later after the file has gone stale 1712 * under NFSV3. NFSV2 does not have this problem because 1713 * ( as far as I can tell ) it flushes dirty buffers more 1714 * often. 1715 * 1716 * Skip the rename operation if the fsync fails, this can happen 1717 * due to the server's volume being full, when we pushed out data 1718 * that was written back to our cache earlier. Not checking for 1719 * this condition can result in potential (silent) data loss. 1720 */ 1721 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread); 1722 VOP_UNLOCK(fvp, 0); 1723 if (!error && tvp) 1724 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread); 1725 if (error) 1726 goto out; 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 && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1735 vput(tvp); 1736 tvp = NULL; 1737 } 1738 1739 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1740 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1741 tcnp->cn_thread); 1742 1743 if (!error) { 1744 /* 1745 * For NFSv4, check to see if it is the same name and 1746 * replace the name, if it is different. 1747 */ 1748 MALLOC(newv4, struct nfsv4node *, 1749 sizeof (struct nfsv4node) + 1750 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1, 1751 M_NFSV4NODE, M_WAITOK); 1752 mtx_lock(&tdnp->n_mtx); 1753 mtx_lock(&fnp->n_mtx); 1754 if (fnp->n_v4 != NULL && fvp->v_type == VREG && 1755 (fnp->n_v4->n4_namelen != tcnp->cn_namelen || 1756 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4), 1757 tcnp->cn_namelen) || 1758 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen || 1759 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, 1760 tdnp->n_fhp->nfh_len))) { 1761 #ifdef notdef 1762 { char nnn[100]; int nnnl; 1763 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99; 1764 bcopy(tcnp->cn_nameptr, nnn, nnnl); 1765 nnn[nnnl] = '\0'; 1766 printf("ren replace=%s\n",nnn); 1767 } 1768 #endif 1769 FREE((caddr_t)fnp->n_v4, M_NFSV4NODE); 1770 fnp->n_v4 = newv4; 1771 newv4 = NULL; 1772 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len; 1773 fnp->n_v4->n4_namelen = tcnp->cn_namelen; 1774 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, 1775 tdnp->n_fhp->nfh_len); 1776 NFSBCOPY(tcnp->cn_nameptr, 1777 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen); 1778 } 1779 mtx_unlock(&tdnp->n_mtx); 1780 mtx_unlock(&fnp->n_mtx); 1781 if (newv4 != NULL) 1782 FREE((caddr_t)newv4, M_NFSV4NODE); 1783 } 1784 1785 if (fvp->v_type == VDIR) { 1786 if (tvp != NULL && tvp->v_type == VDIR) 1787 cache_purge(tdvp); 1788 cache_purge(fdvp); 1789 } 1790 1791 out: 1792 if (tdvp == tvp) 1793 vrele(tdvp); 1794 else 1795 vput(tdvp); 1796 if (tvp) 1797 vput(tvp); 1798 vrele(fdvp); 1799 vrele(fvp); 1800 /* 1801 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1802 */ 1803 if (error == ENOENT) 1804 error = 0; 1805 return (error); 1806 } 1807 1808 /* 1809 * nfs file rename rpc called from nfs_remove() above 1810 */ 1811 static int 1812 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp, 1813 struct sillyrename *sp) 1814 { 1815 1816 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen, 1817 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred, 1818 scnp->cn_thread)); 1819 } 1820 1821 /* 1822 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1823 */ 1824 static int 1825 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr, 1826 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr, 1827 int tnamelen, struct ucred *cred, struct thread *td) 1828 { 1829 struct nfsvattr fnfsva, tnfsva; 1830 struct nfsnode *fdnp = VTONFS(fdvp); 1831 struct nfsnode *tdnp = VTONFS(tdvp); 1832 int error = 0, fattrflag, tattrflag; 1833 1834 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp, 1835 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag, 1836 &tattrflag, NULL, NULL); 1837 mtx_lock(&fdnp->n_mtx); 1838 fdnp->n_flag |= NMODIFIED; 1839 mtx_unlock(&fdnp->n_mtx); 1840 mtx_lock(&tdnp->n_mtx); 1841 tdnp->n_flag |= NMODIFIED; 1842 mtx_unlock(&tdnp->n_mtx); 1843 if (fattrflag) 1844 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1); 1845 else 1846 fdnp->n_attrstamp = 0; 1847 if (tattrflag) 1848 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1); 1849 else 1850 tdnp->n_attrstamp = 0; 1851 if (error && NFS_ISV4(fdvp)) 1852 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 1853 return (error); 1854 } 1855 1856 /* 1857 * nfs hard link create call 1858 */ 1859 static int 1860 nfs_link(struct vop_link_args *ap) 1861 { 1862 struct vnode *vp = ap->a_vp; 1863 struct vnode *tdvp = ap->a_tdvp; 1864 struct componentname *cnp = ap->a_cnp; 1865 struct nfsnode *tdnp; 1866 struct nfsvattr nfsva, dnfsva; 1867 int error = 0, attrflag, dattrflag; 1868 1869 if (vp->v_mount != tdvp->v_mount) { 1870 return (EXDEV); 1871 } 1872 1873 /* 1874 * Push all writes to the server, so that the attribute cache 1875 * doesn't get "out of sync" with the server. 1876 * XXX There should be a better way! 1877 */ 1878 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread); 1879 1880 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 1881 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag, 1882 &dattrflag, NULL); 1883 tdnp = VTONFS(tdvp); 1884 mtx_lock(&tdnp->n_mtx); 1885 tdnp->n_flag |= NMODIFIED; 1886 mtx_unlock(&tdnp->n_mtx); 1887 if (attrflag) 1888 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 1889 else 1890 VTONFS(vp)->n_attrstamp = 0; 1891 if (dattrflag) 1892 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1); 1893 else 1894 tdnp->n_attrstamp = 0; 1895 /* 1896 * If negative lookup caching is enabled, I might as well 1897 * add an entry for this node. Not necessary for correctness, 1898 * but if negative caching is enabled, then the system 1899 * must care about lookup caching hit rate, so... 1900 */ 1901 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 && 1902 (cnp->cn_flags & MAKEENTRY)) 1903 cache_enter(tdvp, vp, cnp); 1904 if (error && NFS_ISV4(vp)) 1905 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0, 1906 (gid_t)0); 1907 return (error); 1908 } 1909 1910 /* 1911 * nfs symbolic link create call 1912 */ 1913 static int 1914 nfs_symlink(struct vop_symlink_args *ap) 1915 { 1916 struct vnode *dvp = ap->a_dvp; 1917 struct vattr *vap = ap->a_vap; 1918 struct componentname *cnp = ap->a_cnp; 1919 struct nfsvattr nfsva, dnfsva; 1920 struct nfsfh *nfhp; 1921 struct nfsnode *np = NULL, *dnp; 1922 struct vnode *newvp = NULL; 1923 int error = 0, attrflag, dattrflag, ret; 1924 1925 vap->va_type = VLNK; 1926 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1927 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, 1928 &nfsva, &nfhp, &attrflag, &dattrflag, NULL); 1929 if (nfhp) { 1930 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread, 1931 &np, NULL); 1932 if (!ret) 1933 newvp = NFSTOV(np); 1934 else if (!error) 1935 error = ret; 1936 } 1937 if (newvp != NULL) { 1938 if (attrflag) 1939 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, 1940 0, 1); 1941 } else if (!error) { 1942 /* 1943 * If we do not have an error and we could not extract the 1944 * newvp from the response due to the request being NFSv2, we 1945 * have to do a lookup in order to obtain a newvp to return. 1946 */ 1947 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1948 cnp->cn_cred, cnp->cn_thread, &np); 1949 if (!error) 1950 newvp = NFSTOV(np); 1951 } 1952 if (error) { 1953 if (newvp) 1954 vput(newvp); 1955 if (NFS_ISV4(dvp)) 1956 error = nfscl_maperr(cnp->cn_thread, error, 1957 vap->va_uid, vap->va_gid); 1958 } else { 1959 /* 1960 * If negative lookup caching is enabled, I might as well 1961 * add an entry for this node. Not necessary for correctness, 1962 * but if negative caching is enabled, then the system 1963 * must care about lookup caching hit rate, so... 1964 */ 1965 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 && 1966 (cnp->cn_flags & MAKEENTRY)) 1967 cache_enter(dvp, newvp, cnp); 1968 *ap->a_vpp = newvp; 1969 } 1970 1971 dnp = VTONFS(dvp); 1972 mtx_lock(&dnp->n_mtx); 1973 dnp->n_flag |= NMODIFIED; 1974 mtx_unlock(&dnp->n_mtx); 1975 if (dattrflag) 1976 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); 1977 else 1978 dnp->n_attrstamp = 0; 1979 return (error); 1980 } 1981 1982 /* 1983 * nfs make dir call 1984 */ 1985 static int 1986 nfs_mkdir(struct vop_mkdir_args *ap) 1987 { 1988 struct vnode *dvp = ap->a_dvp; 1989 struct vattr *vap = ap->a_vap; 1990 struct componentname *cnp = ap->a_cnp; 1991 struct nfsnode *np = NULL, *dnp; 1992 struct vnode *newvp = NULL; 1993 struct vattr vattr; 1994 struct nfsfh *nfhp; 1995 struct nfsvattr nfsva, dnfsva; 1996 int error = 0, attrflag, dattrflag, ret; 1997 1998 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) 1999 return (error); 2000 vap->va_type = VDIR; 2001 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2002 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp, 2003 &attrflag, &dattrflag, NULL); 2004 dnp = VTONFS(dvp); 2005 mtx_lock(&dnp->n_mtx); 2006 dnp->n_flag |= NMODIFIED; 2007 mtx_unlock(&dnp->n_mtx); 2008 if (dattrflag) 2009 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); 2010 else 2011 dnp->n_attrstamp = 0; 2012 if (nfhp) { 2013 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread, 2014 &np, NULL); 2015 if (!ret) { 2016 newvp = NFSTOV(np); 2017 if (attrflag) 2018 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 2019 NULL, 0, 1); 2020 } else if (!error) 2021 error = ret; 2022 } 2023 if (!error && newvp == NULL) { 2024 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2025 cnp->cn_cred, cnp->cn_thread, &np); 2026 if (!error) { 2027 newvp = NFSTOV(np); 2028 if (newvp->v_type != VDIR) 2029 error = EEXIST; 2030 } 2031 } 2032 if (error) { 2033 if (newvp) 2034 vput(newvp); 2035 if (NFS_ISV4(dvp)) 2036 error = nfscl_maperr(cnp->cn_thread, error, 2037 vap->va_uid, vap->va_gid); 2038 } else { 2039 /* 2040 * If negative lookup caching is enabled, I might as well 2041 * add an entry for this node. Not necessary for correctness, 2042 * but if negative caching is enabled, then the system 2043 * must care about lookup caching hit rate, so... 2044 */ 2045 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 && 2046 (cnp->cn_flags & MAKEENTRY)) 2047 cache_enter(dvp, newvp, cnp); 2048 *ap->a_vpp = newvp; 2049 } 2050 return (error); 2051 } 2052 2053 /* 2054 * nfs remove directory call 2055 */ 2056 static int 2057 nfs_rmdir(struct vop_rmdir_args *ap) 2058 { 2059 struct vnode *vp = ap->a_vp; 2060 struct vnode *dvp = ap->a_dvp; 2061 struct componentname *cnp = ap->a_cnp; 2062 struct nfsnode *dnp; 2063 struct nfsvattr dnfsva; 2064 int error, dattrflag; 2065 2066 if (dvp == vp) 2067 return (EINVAL); 2068 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2069 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL); 2070 dnp = VTONFS(dvp); 2071 mtx_lock(&dnp->n_mtx); 2072 dnp->n_flag |= NMODIFIED; 2073 mtx_unlock(&dnp->n_mtx); 2074 if (dattrflag) 2075 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); 2076 else 2077 dnp->n_attrstamp = 0; 2078 2079 cache_purge(dvp); 2080 cache_purge(vp); 2081 if (error && NFS_ISV4(dvp)) 2082 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0, 2083 (gid_t)0); 2084 /* 2085 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2086 */ 2087 if (error == ENOENT) 2088 error = 0; 2089 return (error); 2090 } 2091 2092 /* 2093 * nfs readdir call 2094 */ 2095 static int 2096 nfs_readdir(struct vop_readdir_args *ap) 2097 { 2098 struct vnode *vp = ap->a_vp; 2099 struct nfsnode *np = VTONFS(vp); 2100 struct uio *uio = ap->a_uio; 2101 int tresid, error = 0; 2102 struct vattr vattr; 2103 2104 if (vp->v_type != VDIR) 2105 return(EPERM); 2106 2107 /* 2108 * First, check for hit on the EOF offset cache 2109 */ 2110 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 2111 (np->n_flag & NMODIFIED) == 0) { 2112 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) { 2113 mtx_lock(&np->n_mtx); 2114 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) || 2115 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { 2116 mtx_unlock(&np->n_mtx); 2117 NFSINCRGLOBAL(newnfsstats.direofcache_hits); 2118 return (0); 2119 } else 2120 mtx_unlock(&np->n_mtx); 2121 } 2122 } 2123 2124 /* 2125 * Call ncl_bioread() to do the real work. 2126 */ 2127 tresid = uio->uio_resid; 2128 error = ncl_bioread(vp, uio, 0, ap->a_cred); 2129 2130 if (!error && uio->uio_resid == tresid) 2131 NFSINCRGLOBAL(newnfsstats.direofcache_misses); 2132 return (error); 2133 } 2134 2135 /* 2136 * Readdir rpc call. 2137 * Called from below the buffer cache by ncl_doio(). 2138 */ 2139 int 2140 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2141 struct thread *td) 2142 { 2143 struct nfsvattr nfsva; 2144 nfsuint64 *cookiep, cookie; 2145 struct nfsnode *dnp = VTONFS(vp); 2146 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2147 int error = 0, eof, attrflag; 2148 2149 KASSERT(uiop->uio_iovcnt == 1 && 2150 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && 2151 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, 2152 ("nfs readdirrpc bad uio")); 2153 2154 /* 2155 * If there is no cookie, assume directory was stale. 2156 */ 2157 ncl_dircookie_lock(dnp); 2158 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); 2159 if (cookiep) { 2160 cookie = *cookiep; 2161 ncl_dircookie_unlock(dnp); 2162 } else { 2163 ncl_dircookie_unlock(dnp); 2164 return (NFSERR_BAD_COOKIE); 2165 } 2166 2167 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) 2168 (void)ncl_fsinfo(nmp, vp, cred, td); 2169 2170 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva, 2171 &attrflag, &eof, NULL); 2172 if (attrflag) 2173 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 2174 2175 if (!error) { 2176 /* 2177 * We are now either at the end of the directory or have filled 2178 * the block. 2179 */ 2180 if (eof) 2181 dnp->n_direofoffset = uiop->uio_offset; 2182 else { 2183 if (uiop->uio_resid > 0) 2184 ncl_printf("EEK! readdirrpc resid > 0\n"); 2185 ncl_dircookie_lock(dnp); 2186 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); 2187 *cookiep = cookie; 2188 ncl_dircookie_unlock(dnp); 2189 } 2190 } else if (NFS_ISV4(vp)) { 2191 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2192 } 2193 return (error); 2194 } 2195 2196 /* 2197 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc(). 2198 */ 2199 int 2200 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, 2201 struct thread *td) 2202 { 2203 struct nfsvattr nfsva; 2204 nfsuint64 *cookiep, cookie; 2205 struct nfsnode *dnp = VTONFS(vp); 2206 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2207 int error = 0, attrflag, eof; 2208 2209 KASSERT(uiop->uio_iovcnt == 1 && 2210 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && 2211 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, 2212 ("nfs readdirplusrpc bad uio")); 2213 2214 /* 2215 * If there is no cookie, assume directory was stale. 2216 */ 2217 ncl_dircookie_lock(dnp); 2218 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); 2219 if (cookiep) { 2220 cookie = *cookiep; 2221 ncl_dircookie_unlock(dnp); 2222 } else { 2223 ncl_dircookie_unlock(dnp); 2224 return (NFSERR_BAD_COOKIE); 2225 } 2226 2227 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) 2228 (void)ncl_fsinfo(nmp, vp, cred, td); 2229 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva, 2230 &attrflag, &eof, NULL); 2231 if (attrflag) 2232 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); 2233 2234 if (!error) { 2235 /* 2236 * We are now either at end of the directory or have filled the 2237 * the block. 2238 */ 2239 if (eof) 2240 dnp->n_direofoffset = uiop->uio_offset; 2241 else { 2242 if (uiop->uio_resid > 0) 2243 ncl_printf("EEK! readdirplusrpc resid > 0\n"); 2244 ncl_dircookie_lock(dnp); 2245 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); 2246 *cookiep = cookie; 2247 ncl_dircookie_unlock(dnp); 2248 } 2249 } else if (NFS_ISV4(vp)) { 2250 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2251 } 2252 return (error); 2253 } 2254 2255 /* 2256 * Silly rename. To make the NFS filesystem that is stateless look a little 2257 * more like the "ufs" a remove of an active vnode is translated to a rename 2258 * to a funny looking filename that is removed by nfs_inactive on the 2259 * nfsnode. There is the potential for another process on a different client 2260 * to create the same funny name between the nfs_lookitup() fails and the 2261 * nfs_rename() completes, but... 2262 */ 2263 static int 2264 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2265 { 2266 struct sillyrename *sp; 2267 struct nfsnode *np; 2268 int error; 2269 short pid; 2270 unsigned int lticks; 2271 2272 cache_purge(dvp); 2273 np = VTONFS(vp); 2274 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir")); 2275 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2276 M_NEWNFSREQ, M_WAITOK); 2277 sp->s_cred = crhold(cnp->cn_cred); 2278 sp->s_dvp = dvp; 2279 VREF(dvp); 2280 2281 /* 2282 * Fudge together a funny name. 2283 * Changing the format of the funny name to accomodate more 2284 * sillynames per directory. 2285 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is 2286 * CPU ticks since boot. 2287 */ 2288 pid = cnp->cn_thread->td_proc->p_pid; 2289 lticks = (unsigned int)ticks; 2290 for ( ; ; ) { 2291 sp->s_namlen = sprintf(sp->s_name, 2292 ".nfs.%08x.%04x4.4", lticks, 2293 pid); 2294 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2295 cnp->cn_thread, NULL)) 2296 break; 2297 lticks++; 2298 } 2299 error = nfs_renameit(dvp, vp, cnp, sp); 2300 if (error) 2301 goto bad; 2302 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2303 cnp->cn_thread, &np); 2304 np->n_sillyrename = sp; 2305 return (0); 2306 bad: 2307 vrele(sp->s_dvp); 2308 crfree(sp->s_cred); 2309 free((caddr_t)sp, M_NEWNFSREQ); 2310 return (error); 2311 } 2312 2313 /* 2314 * Look up a file name and optionally either update the file handle or 2315 * allocate an nfsnode, depending on the value of npp. 2316 * npp == NULL --> just do the lookup 2317 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2318 * handled too 2319 * *npp != NULL --> update the file handle in the vnode 2320 */ 2321 static int 2322 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred, 2323 struct thread *td, struct nfsnode **npp) 2324 { 2325 struct vnode *newvp = NULL, *vp; 2326 struct nfsnode *np, *dnp = VTONFS(dvp); 2327 struct nfsfh *nfhp, *onfhp; 2328 struct nfsvattr nfsva, dnfsva; 2329 struct componentname cn; 2330 int error = 0, attrflag, dattrflag; 2331 u_int hash; 2332 2333 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva, 2334 &nfhp, &attrflag, &dattrflag, NULL); 2335 if (dattrflag) 2336 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); 2337 if (npp && !error) { 2338 if (*npp != NULL) { 2339 np = *npp; 2340 vp = NFSTOV(np); 2341 /* 2342 * For NFSv4, check to see if it is the same name and 2343 * replace the name, if it is different. 2344 */ 2345 if (np->n_v4 != NULL && nfsva.na_type == VREG && 2346 (np->n_v4->n4_namelen != len || 2347 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) || 2348 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || 2349 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 2350 dnp->n_fhp->nfh_len))) { 2351 #ifdef notdef 2352 { char nnn[100]; int nnnl; 2353 nnnl = (len < 100) ? len : 99; 2354 bcopy(name, nnn, nnnl); 2355 nnn[nnnl] = '\0'; 2356 printf("replace=%s\n",nnn); 2357 } 2358 #endif 2359 FREE((caddr_t)np->n_v4, M_NFSV4NODE); 2360 MALLOC(np->n_v4, struct nfsv4node *, 2361 sizeof (struct nfsv4node) + 2362 dnp->n_fhp->nfh_len + len - 1, 2363 M_NFSV4NODE, M_WAITOK); 2364 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; 2365 np->n_v4->n4_namelen = len; 2366 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, 2367 dnp->n_fhp->nfh_len); 2368 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len); 2369 } 2370 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, 2371 FNV1_32_INIT); 2372 onfhp = np->n_fhp; 2373 /* 2374 * Rehash node for new file handle. 2375 */ 2376 vfs_hash_rehash(vp, hash); 2377 np->n_fhp = nfhp; 2378 if (onfhp != NULL) 2379 FREE((caddr_t)onfhp, M_NFSFH); 2380 newvp = NFSTOV(np); 2381 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) { 2382 FREE((caddr_t)nfhp, M_NFSFH); 2383 VREF(dvp); 2384 newvp = dvp; 2385 } else { 2386 cn.cn_nameptr = name; 2387 cn.cn_namelen = len; 2388 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td, 2389 &np, NULL); 2390 if (error) 2391 return (error); 2392 newvp = NFSTOV(np); 2393 } 2394 if (!attrflag && *npp == NULL) { 2395 vrele(newvp); 2396 return (ENOENT); 2397 } 2398 if (attrflag) 2399 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, 2400 0, 1); 2401 } 2402 if (npp && *npp == NULL) { 2403 if (error) { 2404 if (newvp) { 2405 if (newvp == dvp) 2406 vrele(newvp); 2407 else 2408 vput(newvp); 2409 } 2410 } else 2411 *npp = np; 2412 } 2413 if (error && NFS_ISV4(dvp)) 2414 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2415 return (error); 2416 } 2417 2418 /* 2419 * Nfs Version 3 and 4 commit rpc 2420 */ 2421 int 2422 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred, 2423 struct thread *td) 2424 { 2425 struct nfsvattr nfsva; 2426 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2427 int error, attrflag; 2428 u_char verf[NFSX_VERF]; 2429 2430 mtx_lock(&nmp->nm_mtx); 2431 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) { 2432 mtx_unlock(&nmp->nm_mtx); 2433 return (0); 2434 } 2435 mtx_unlock(&nmp->nm_mtx); 2436 error = nfsrpc_commit(vp, offset, cnt, cred, td, verf, &nfsva, 2437 &attrflag, NULL); 2438 if (!error) { 2439 if (NFSBCMP((caddr_t)nmp->nm_verf, verf, NFSX_VERF)) { 2440 NFSBCOPY(verf, (caddr_t)nmp->nm_verf, NFSX_VERF); 2441 error = NFSERR_STALEWRITEVERF; 2442 } 2443 if (!error && attrflag) 2444 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 2445 0, 1); 2446 } else if (NFS_ISV4(vp)) { 2447 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); 2448 } 2449 return (error); 2450 } 2451 2452 /* 2453 * Strategy routine. 2454 * For async requests when nfsiod(s) are running, queue the request by 2455 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the 2456 * request. 2457 */ 2458 static int 2459 nfs_strategy(struct vop_strategy_args *ap) 2460 { 2461 struct buf *bp = ap->a_bp; 2462 struct ucred *cr; 2463 2464 KASSERT(!(bp->b_flags & B_DONE), 2465 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp)); 2466 BUF_ASSERT_HELD(bp); 2467 2468 if (bp->b_iocmd == BIO_READ) 2469 cr = bp->b_rcred; 2470 else 2471 cr = bp->b_wcred; 2472 2473 /* 2474 * If the op is asynchronous and an i/o daemon is waiting 2475 * queue the request, wake it up and wait for completion 2476 * otherwise just do it ourselves. 2477 */ 2478 if ((bp->b_flags & B_ASYNC) == 0 || 2479 ncl_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread)) 2480 (void) ncl_doio(ap->a_vp, bp, cr, curthread, 1); 2481 return (0); 2482 } 2483 2484 /* 2485 * fsync vnode op. Just call ncl_flush() with commit == 1. 2486 */ 2487 /* ARGSUSED */ 2488 static int 2489 nfs_fsync(struct vop_fsync_args *ap) 2490 { 2491 return (ncl_flush(ap->a_vp, ap->a_waitfor, NULL, ap->a_td, 1, 0)); 2492 } 2493 2494 /* 2495 * Flush all the blocks associated with a vnode. 2496 * Walk through the buffer pool and push any dirty pages 2497 * associated with the vnode. 2498 * If the called_from_renewthread argument is TRUE, it has been called 2499 * from the NFSv4 renew thread and, as such, cannot block indefinitely 2500 * waiting for a buffer write to complete. 2501 */ 2502 int 2503 ncl_flush(struct vnode *vp, int waitfor, struct ucred *cred, struct thread *td, 2504 int commit, int called_from_renewthread) 2505 { 2506 struct nfsnode *np = VTONFS(vp); 2507 struct buf *bp; 2508 int i; 2509 struct buf *nbp; 2510 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2511 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2512 int passone = 1, trycnt = 0; 2513 u_quad_t off, endoff, toff; 2514 struct ucred* wcred = NULL; 2515 struct buf **bvec = NULL; 2516 struct bufobj *bo; 2517 #ifndef NFS_COMMITBVECSIZ 2518 #define NFS_COMMITBVECSIZ 20 2519 #endif 2520 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; 2521 int bvecsize = 0, bveccount; 2522 2523 if (called_from_renewthread != 0) 2524 slptimeo = hz; 2525 if (nmp->nm_flag & NFSMNT_INT) 2526 slpflag = NFS_PCATCH; 2527 if (!commit) 2528 passone = 0; 2529 bo = &vp->v_bufobj; 2530 /* 2531 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2532 * server, but has not been committed to stable storage on the server 2533 * yet. On the first pass, the byte range is worked out and the commit 2534 * rpc is done. On the second pass, ncl_writebp() is called to do the 2535 * job. 2536 */ 2537 again: 2538 off = (u_quad_t)-1; 2539 endoff = 0; 2540 bvecpos = 0; 2541 if (NFS_ISV34(vp) && commit) { 2542 if (bvec != NULL && bvec != bvec_on_stack) 2543 free(bvec, M_TEMP); 2544 /* 2545 * Count up how many buffers waiting for a commit. 2546 */ 2547 bveccount = 0; 2548 BO_LOCK(bo); 2549 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 2550 if (!BUF_ISLOCKED(bp) && 2551 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2552 == (B_DELWRI | B_NEEDCOMMIT)) 2553 bveccount++; 2554 } 2555 /* 2556 * Allocate space to remember the list of bufs to commit. It is 2557 * important to use M_NOWAIT here to avoid a race with nfs_write. 2558 * If we can't get memory (for whatever reason), we will end up 2559 * committing the buffers one-by-one in the loop below. 2560 */ 2561 if (bveccount > NFS_COMMITBVECSIZ) { 2562 /* 2563 * Release the vnode interlock to avoid a lock 2564 * order reversal. 2565 */ 2566 BO_UNLOCK(bo); 2567 bvec = (struct buf **) 2568 malloc(bveccount * sizeof(struct buf *), 2569 M_TEMP, M_NOWAIT); 2570 BO_LOCK(bo); 2571 if (bvec == NULL) { 2572 bvec = bvec_on_stack; 2573 bvecsize = NFS_COMMITBVECSIZ; 2574 } else 2575 bvecsize = bveccount; 2576 } else { 2577 bvec = bvec_on_stack; 2578 bvecsize = NFS_COMMITBVECSIZ; 2579 } 2580 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 2581 if (bvecpos >= bvecsize) 2582 break; 2583 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 2584 nbp = TAILQ_NEXT(bp, b_bobufs); 2585 continue; 2586 } 2587 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != 2588 (B_DELWRI | B_NEEDCOMMIT)) { 2589 BUF_UNLOCK(bp); 2590 nbp = TAILQ_NEXT(bp, b_bobufs); 2591 continue; 2592 } 2593 BO_UNLOCK(bo); 2594 bremfree(bp); 2595 /* 2596 * Work out if all buffers are using the same cred 2597 * so we can deal with them all with one commit. 2598 * 2599 * NOTE: we are not clearing B_DONE here, so we have 2600 * to do it later on in this routine if we intend to 2601 * initiate I/O on the bp. 2602 * 2603 * Note: to avoid loopback deadlocks, we do not 2604 * assign b_runningbufspace. 2605 */ 2606 if (wcred == NULL) 2607 wcred = bp->b_wcred; 2608 else if (wcred != bp->b_wcred) 2609 wcred = NOCRED; 2610 vfs_busy_pages(bp, 1); 2611 2612 BO_LOCK(bo); 2613 /* 2614 * bp is protected by being locked, but nbp is not 2615 * and vfs_busy_pages() may sleep. We have to 2616 * recalculate nbp. 2617 */ 2618 nbp = TAILQ_NEXT(bp, b_bobufs); 2619 2620 /* 2621 * A list of these buffers is kept so that the 2622 * second loop knows which buffers have actually 2623 * been committed. This is necessary, since there 2624 * may be a race between the commit rpc and new 2625 * uncommitted writes on the file. 2626 */ 2627 bvec[bvecpos++] = bp; 2628 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2629 bp->b_dirtyoff; 2630 if (toff < off) 2631 off = toff; 2632 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2633 if (toff > endoff) 2634 endoff = toff; 2635 } 2636 BO_UNLOCK(bo); 2637 } 2638 if (bvecpos > 0) { 2639 /* 2640 * Commit data on the server, as required. 2641 * If all bufs are using the same wcred, then use that with 2642 * one call for all of them, otherwise commit each one 2643 * separately. 2644 */ 2645 if (wcred != NOCRED) 2646 retv = ncl_commit(vp, off, (int)(endoff - off), 2647 wcred, td); 2648 else { 2649 retv = 0; 2650 for (i = 0; i < bvecpos; i++) { 2651 off_t off, size; 2652 bp = bvec[i]; 2653 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2654 bp->b_dirtyoff; 2655 size = (u_quad_t)(bp->b_dirtyend 2656 - bp->b_dirtyoff); 2657 retv = ncl_commit(vp, off, (int)size, 2658 bp->b_wcred, td); 2659 if (retv) break; 2660 } 2661 } 2662 2663 if (retv == NFSERR_STALEWRITEVERF) 2664 ncl_clearcommit(vp->v_mount); 2665 2666 /* 2667 * Now, either mark the blocks I/O done or mark the 2668 * blocks dirty, depending on whether the commit 2669 * succeeded. 2670 */ 2671 for (i = 0; i < bvecpos; i++) { 2672 bp = bvec[i]; 2673 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2674 if (retv) { 2675 /* 2676 * Error, leave B_DELWRI intact 2677 */ 2678 vfs_unbusy_pages(bp); 2679 brelse(bp); 2680 } else { 2681 /* 2682 * Success, remove B_DELWRI ( bundirty() ). 2683 * 2684 * b_dirtyoff/b_dirtyend seem to be NFS 2685 * specific. We should probably move that 2686 * into bundirty(). XXX 2687 */ 2688 bufobj_wref(bo); 2689 bp->b_flags |= B_ASYNC; 2690 bundirty(bp); 2691 bp->b_flags &= ~B_DONE; 2692 bp->b_ioflags &= ~BIO_ERROR; 2693 bp->b_dirtyoff = bp->b_dirtyend = 0; 2694 bufdone(bp); 2695 } 2696 } 2697 } 2698 2699 /* 2700 * Start/do any write(s) that are required. 2701 */ 2702 loop: 2703 BO_LOCK(bo); 2704 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 2705 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { 2706 if (waitfor != MNT_WAIT || passone) 2707 continue; 2708 2709 error = BUF_TIMELOCK(bp, 2710 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, 2711 BO_MTX(bo), "nfsfsync", slpflag, slptimeo); 2712 if (error == 0) { 2713 BUF_UNLOCK(bp); 2714 goto loop; 2715 } 2716 if (error == ENOLCK) { 2717 error = 0; 2718 goto loop; 2719 } 2720 if (called_from_renewthread != 0) { 2721 /* 2722 * Return EIO so the flush will be retried 2723 * later. 2724 */ 2725 error = EIO; 2726 goto done; 2727 } 2728 if (newnfs_sigintr(nmp, td)) { 2729 error = EINTR; 2730 goto done; 2731 } 2732 if (slpflag & PCATCH) { 2733 slpflag = 0; 2734 slptimeo = 2 * hz; 2735 } 2736 goto loop; 2737 } 2738 if ((bp->b_flags & B_DELWRI) == 0) 2739 panic("nfs_fsync: not dirty"); 2740 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) { 2741 BUF_UNLOCK(bp); 2742 continue; 2743 } 2744 BO_UNLOCK(bo); 2745 bremfree(bp); 2746 if (passone || !commit) 2747 bp->b_flags |= B_ASYNC; 2748 else 2749 bp->b_flags |= B_ASYNC; 2750 bwrite(bp); 2751 if (newnfs_sigintr(nmp, td)) { 2752 error = EINTR; 2753 goto done; 2754 } 2755 goto loop; 2756 } 2757 if (passone) { 2758 passone = 0; 2759 BO_UNLOCK(bo); 2760 goto again; 2761 } 2762 if (waitfor == MNT_WAIT) { 2763 while (bo->bo_numoutput) { 2764 error = bufobj_wwait(bo, slpflag, slptimeo); 2765 if (error) { 2766 BO_UNLOCK(bo); 2767 if (called_from_renewthread != 0) { 2768 /* 2769 * Return EIO so that the flush will be 2770 * retried later. 2771 */ 2772 error = EIO; 2773 goto done; 2774 } 2775 error = newnfs_sigintr(nmp, td); 2776 if (error) 2777 goto done; 2778 if (slpflag & PCATCH) { 2779 slpflag = 0; 2780 slptimeo = 2 * hz; 2781 } 2782 BO_LOCK(bo); 2783 } 2784 } 2785 if (bo->bo_dirty.bv_cnt != 0 && commit) { 2786 BO_UNLOCK(bo); 2787 goto loop; 2788 } 2789 /* 2790 * Wait for all the async IO requests to drain 2791 */ 2792 BO_UNLOCK(bo); 2793 mtx_lock(&np->n_mtx); 2794 while (np->n_directio_asyncwr > 0) { 2795 np->n_flag |= NFSYNCWAIT; 2796 error = newnfs_msleep(td, &np->n_directio_asyncwr, 2797 &np->n_mtx, slpflag | (PRIBIO + 1), 2798 "nfsfsync", 0); 2799 if (error) { 2800 if (newnfs_sigintr(nmp, td)) { 2801 mtx_unlock(&np->n_mtx); 2802 error = EINTR; 2803 goto done; 2804 } 2805 } 2806 } 2807 mtx_unlock(&np->n_mtx); 2808 } else 2809 BO_UNLOCK(bo); 2810 mtx_lock(&np->n_mtx); 2811 if (np->n_flag & NWRITEERR) { 2812 error = np->n_error; 2813 np->n_flag &= ~NWRITEERR; 2814 } 2815 if (commit && bo->bo_dirty.bv_cnt == 0 && 2816 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0) 2817 np->n_flag &= ~NMODIFIED; 2818 mtx_unlock(&np->n_mtx); 2819 done: 2820 if (bvec != NULL && bvec != bvec_on_stack) 2821 free(bvec, M_TEMP); 2822 if (error == 0 && commit != 0 && waitfor == MNT_WAIT && 2823 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 || 2824 np->n_directio_asyncwr != 0) && trycnt++ < 5) { 2825 /* try, try again... */ 2826 passone = 1; 2827 wcred = NULL; 2828 bvec = NULL; 2829 bvecsize = 0; 2830 printf("try%d\n", trycnt); 2831 goto again; 2832 } 2833 return (error); 2834 } 2835 2836 /* 2837 * NFS advisory byte-level locks. 2838 */ 2839 static int 2840 nfs_advlock(struct vop_advlock_args *ap) 2841 { 2842 struct vnode *vp = ap->a_vp; 2843 struct ucred *cred; 2844 struct nfsnode *np = VTONFS(ap->a_vp); 2845 struct proc *p = (struct proc *)ap->a_id; 2846 struct thread *td = curthread; /* XXX */ 2847 struct vattr va; 2848 int ret, error = EOPNOTSUPP; 2849 u_quad_t size; 2850 2851 if (NFS_ISV4(vp) && (ap->a_flags & F_POSIX)) { 2852 cred = p->p_ucred; 2853 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2854 if (vp->v_iflag & VI_DOOMED) { 2855 VOP_UNLOCK(vp, 0); 2856 return (EBADF); 2857 } 2858 2859 /* 2860 * If this is unlocking a write locked region, flush and 2861 * commit them before unlocking. This is required by 2862 * RFC3530 Sec. 9.3.2. 2863 */ 2864 if (ap->a_op == F_UNLCK && 2865 nfscl_checkwritelocked(vp, ap->a_fl, cred, td)) 2866 (void) ncl_flush(vp, MNT_WAIT, cred, td, 1, 0); 2867 2868 /* 2869 * Loop around doing the lock op, while a blocking lock 2870 * must wait for the lock op to succeed. 2871 */ 2872 do { 2873 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op, 2874 ap->a_fl, 0, cred, td); 2875 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && 2876 ap->a_op == F_SETLK) { 2877 VOP_UNLOCK(vp, 0); 2878 error = nfs_catnap(PZERO | PCATCH, ret, 2879 "ncladvl"); 2880 if (error) 2881 return (EINTR); 2882 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2883 if (vp->v_iflag & VI_DOOMED) { 2884 VOP_UNLOCK(vp, 0); 2885 return (EBADF); 2886 } 2887 } 2888 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && 2889 ap->a_op == F_SETLK); 2890 if (ret == NFSERR_DENIED) { 2891 VOP_UNLOCK(vp, 0); 2892 return (EAGAIN); 2893 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) { 2894 VOP_UNLOCK(vp, 0); 2895 return (ret); 2896 } else if (ret != 0) { 2897 VOP_UNLOCK(vp, 0); 2898 return (EACCES); 2899 } 2900 2901 /* 2902 * Now, if we just got a lock, invalidate data in the buffer 2903 * cache, as required, so that the coherency conforms with 2904 * RFC3530 Sec. 9.3.2. 2905 */ 2906 if (ap->a_op == F_SETLK) { 2907 if ((np->n_flag & NMODIFIED) == 0) { 2908 np->n_attrstamp = 0; 2909 ret = VOP_GETATTR(vp, &va, cred); 2910 } 2911 if ((np->n_flag & NMODIFIED) || ret || 2912 np->n_change != va.va_filerev) { 2913 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1); 2914 np->n_attrstamp = 0; 2915 ret = VOP_GETATTR(vp, &va, cred); 2916 if (!ret) { 2917 np->n_mtime = va.va_mtime; 2918 np->n_change = va.va_filerev; 2919 } 2920 } 2921 } 2922 VOP_UNLOCK(vp, 0); 2923 return (0); 2924 } else if (!NFS_ISV4(vp)) { 2925 error = vn_lock(vp, LK_SHARED); 2926 if (error) 2927 return (error); 2928 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) { 2929 size = VTONFS(vp)->n_size; 2930 VOP_UNLOCK(vp, 0); 2931 error = lf_advlock(ap, &(vp->v_lockf), size); 2932 } else { 2933 if (nfs_advlock_p != NULL) 2934 error = nfs_advlock_p(ap); 2935 else { 2936 VOP_UNLOCK(vp, 0); 2937 error = ENOLCK; 2938 } 2939 } 2940 } 2941 return (error); 2942 } 2943 2944 /* 2945 * NFS advisory byte-level locks. 2946 */ 2947 static int 2948 nfs_advlockasync(struct vop_advlockasync_args *ap) 2949 { 2950 struct vnode *vp = ap->a_vp; 2951 u_quad_t size; 2952 int error; 2953 2954 if (NFS_ISV4(vp)) 2955 return (EOPNOTSUPP); 2956 error = vn_lock(vp, LK_SHARED); 2957 if (error) 2958 return (error); 2959 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) { 2960 size = VTONFS(vp)->n_size; 2961 VOP_UNLOCK(vp, 0); 2962 error = lf_advlockasync(ap, &(vp->v_lockf), size); 2963 } else { 2964 VOP_UNLOCK(vp, 0); 2965 error = EOPNOTSUPP; 2966 } 2967 return (error); 2968 } 2969 2970 /* 2971 * Print out the contents of an nfsnode. 2972 */ 2973 static int 2974 nfs_print(struct vop_print_args *ap) 2975 { 2976 struct vnode *vp = ap->a_vp; 2977 struct nfsnode *np = VTONFS(vp); 2978 2979 ncl_printf("\tfileid %ld fsid 0x%x", 2980 np->n_vattr.na_fileid, np->n_vattr.na_fsid); 2981 if (vp->v_type == VFIFO) 2982 fifo_printinfo(vp); 2983 printf("\n"); 2984 return (0); 2985 } 2986 2987 /* 2988 * This is the "real" nfs::bwrite(struct buf*). 2989 * We set B_CACHE if this is a VMIO buffer. 2990 */ 2991 int 2992 ncl_writebp(struct buf *bp, int force __unused, struct thread *td) 2993 { 2994 int s; 2995 int oldflags = bp->b_flags; 2996 #if 0 2997 int retv = 1; 2998 off_t off; 2999 #endif 3000 3001 BUF_ASSERT_HELD(bp); 3002 3003 if (bp->b_flags & B_INVAL) { 3004 brelse(bp); 3005 return(0); 3006 } 3007 3008 bp->b_flags |= B_CACHE; 3009 3010 /* 3011 * Undirty the bp. We will redirty it later if the I/O fails. 3012 */ 3013 3014 s = splbio(); 3015 bundirty(bp); 3016 bp->b_flags &= ~B_DONE; 3017 bp->b_ioflags &= ~BIO_ERROR; 3018 bp->b_iocmd = BIO_WRITE; 3019 3020 bufobj_wref(bp->b_bufobj); 3021 curthread->td_ru.ru_oublock++; 3022 splx(s); 3023 3024 /* 3025 * Note: to avoid loopback deadlocks, we do not 3026 * assign b_runningbufspace. 3027 */ 3028 vfs_busy_pages(bp, 1); 3029 3030 BUF_KERNPROC(bp); 3031 bp->b_iooffset = dbtob(bp->b_blkno); 3032 bstrategy(bp); 3033 3034 if( (oldflags & B_ASYNC) == 0) { 3035 int rtval = bufwait(bp); 3036 3037 if (oldflags & B_DELWRI) { 3038 s = splbio(); 3039 reassignbuf(bp); 3040 splx(s); 3041 } 3042 brelse(bp); 3043 return (rtval); 3044 } 3045 3046 return (0); 3047 } 3048 3049 /* 3050 * nfs special file access vnode op. 3051 * Essentially just get vattr and then imitate iaccess() since the device is 3052 * local to the client. 3053 */ 3054 static int 3055 nfsspec_access(struct vop_access_args *ap) 3056 { 3057 struct vattr *vap; 3058 struct ucred *cred = ap->a_cred; 3059 struct vnode *vp = ap->a_vp; 3060 accmode_t accmode = ap->a_accmode; 3061 struct vattr vattr; 3062 int error; 3063 3064 /* 3065 * Disallow write attempts on filesystems mounted read-only; 3066 * unless the file is a socket, fifo, or a block or character 3067 * device resident on the filesystem. 3068 */ 3069 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3070 switch (vp->v_type) { 3071 case VREG: 3072 case VDIR: 3073 case VLNK: 3074 return (EROFS); 3075 default: 3076 break; 3077 } 3078 } 3079 vap = &vattr; 3080 error = VOP_GETATTR(vp, vap, cred); 3081 if (error) 3082 goto out; 3083 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid, 3084 accmode, cred, NULL); 3085 out: 3086 return error; 3087 } 3088 3089 /* 3090 * Read wrapper for fifos. 3091 */ 3092 static int 3093 nfsfifo_read(struct vop_read_args *ap) 3094 { 3095 struct nfsnode *np = VTONFS(ap->a_vp); 3096 int error; 3097 3098 /* 3099 * Set access flag. 3100 */ 3101 mtx_lock(&np->n_mtx); 3102 np->n_flag |= NACC; 3103 getnanotime(&np->n_atim); 3104 mtx_unlock(&np->n_mtx); 3105 error = fifo_specops.vop_read(ap); 3106 return error; 3107 } 3108 3109 /* 3110 * Write wrapper for fifos. 3111 */ 3112 static int 3113 nfsfifo_write(struct vop_write_args *ap) 3114 { 3115 struct nfsnode *np = VTONFS(ap->a_vp); 3116 3117 /* 3118 * Set update flag. 3119 */ 3120 mtx_lock(&np->n_mtx); 3121 np->n_flag |= NUPD; 3122 getnanotime(&np->n_mtim); 3123 mtx_unlock(&np->n_mtx); 3124 return(fifo_specops.vop_write(ap)); 3125 } 3126 3127 /* 3128 * Close wrapper for fifos. 3129 * 3130 * Update the times on the nfsnode then do fifo close. 3131 */ 3132 static int 3133 nfsfifo_close(struct vop_close_args *ap) 3134 { 3135 struct vnode *vp = ap->a_vp; 3136 struct nfsnode *np = VTONFS(vp); 3137 struct vattr vattr; 3138 struct timespec ts; 3139 3140 mtx_lock(&np->n_mtx); 3141 if (np->n_flag & (NACC | NUPD)) { 3142 getnanotime(&ts); 3143 if (np->n_flag & NACC) 3144 np->n_atim = ts; 3145 if (np->n_flag & NUPD) 3146 np->n_mtim = ts; 3147 np->n_flag |= NCHG; 3148 if (vrefcnt(vp) == 1 && 3149 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3150 VATTR_NULL(&vattr); 3151 if (np->n_flag & NACC) 3152 vattr.va_atime = np->n_atim; 3153 if (np->n_flag & NUPD) 3154 vattr.va_mtime = np->n_mtim; 3155 mtx_unlock(&np->n_mtx); 3156 (void)VOP_SETATTR(vp, &vattr, ap->a_cred); 3157 goto out; 3158 } 3159 } 3160 mtx_unlock(&np->n_mtx); 3161 out: 3162 return (fifo_specops.vop_close(ap)); 3163 } 3164 3165 /* 3166 * Just call ncl_writebp() with the force argument set to 1. 3167 * 3168 * NOTE: B_DONE may or may not be set in a_bp on call. 3169 */ 3170 static int 3171 nfs_bwrite(struct buf *bp) 3172 { 3173 3174 return (ncl_writebp(bp, 1, curthread)); 3175 } 3176 3177 struct buf_ops buf_ops_newnfs = { 3178 .bop_name = "buf_ops_nfs", 3179 .bop_write = nfs_bwrite, 3180 .bop_strategy = bufstrategy, 3181 .bop_sync = bufsync, 3182 .bop_bdflush = bufbdflush, 3183 }; 3184 3185 /* 3186 * Cloned from vop_stdlock(), and then the ugly hack added. 3187 */ 3188 static int 3189 nfs_lock1(struct vop_lock1_args *ap) 3190 { 3191 struct vnode *vp = ap->a_vp; 3192 int error = 0; 3193 3194 /* 3195 * Since vfs_hash_get() calls vget() and it will no longer work 3196 * for FreeBSD8 with flags == 0, I can only think of this horrible 3197 * hack to work around it. I call vfs_hash_get() with LK_EXCLOTHER 3198 * and then handle it here. All I want for this case is a v_usecount 3199 * on the vnode to use for recovery, while another thread might 3200 * hold a lock on the vnode. I have the other threads blocked, so 3201 * there isn't any race problem. 3202 */ 3203 if ((ap->a_flags & LK_TYPE_MASK) == LK_EXCLOTHER) { 3204 if ((ap->a_flags & LK_INTERLOCK) == 0) 3205 panic("ncllock1"); 3206 if ((vp->v_iflag & VI_DOOMED)) 3207 error = ENOENT; 3208 VI_UNLOCK(vp); 3209 return (error); 3210 } 3211 return (_lockmgr_args(vp->v_vnlock, ap->a_flags, VI_MTX(vp), 3212 LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file, 3213 ap->a_line)); 3214 } 3215 3216 static int 3217 nfs_getacl(struct vop_getacl_args *ap) 3218 { 3219 int error; 3220 3221 if (ap->a_type != ACL_TYPE_NFS4) 3222 return (EOPNOTSUPP); 3223 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp, 3224 NULL); 3225 if (error > NFSERR_STALE) { 3226 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); 3227 error = EPERM; 3228 } 3229 return (error); 3230 } 3231 3232 static int 3233 nfs_setacl(struct vop_setacl_args *ap) 3234 { 3235 int error; 3236 3237 if (ap->a_type != ACL_TYPE_NFS4) 3238 return (EOPNOTSUPP); 3239 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp, 3240 NULL); 3241 if (error > NFSERR_STALE) { 3242 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); 3243 error = EPERM; 3244 } 3245 return (error); 3246 } 3247