1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/capsicum.h> 40 #include <sys/extattr.h> 41 42 /* 43 * Functions that perform the vfs operations required by the routines in 44 * nfsd_serv.c. It is hoped that this change will make the server more 45 * portable. 46 */ 47 48 #include <fs/nfs/nfsport.h> 49 #include <sys/hash.h> 50 #include <sys/sysctl.h> 51 #include <nlm/nlm_prot.h> 52 #include <nlm/nlm.h> 53 54 FEATURE(nfsd, "NFSv4 server"); 55 56 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 57 extern int nfsrv_useacl; 58 extern int newnfs_numnfsd; 59 extern struct mount nfsv4root_mnt; 60 extern struct nfsrv_stablefirst nfsrv_stablefirst; 61 extern void (*nfsd_call_servertimer)(void); 62 extern SVCPOOL *nfsrvd_pool; 63 extern struct nfsv4lock nfsd_suspend_lock; 64 extern struct nfsclienthashhead *nfsclienthash; 65 extern struct nfslockhashhead *nfslockhash; 66 extern struct nfssessionhash *nfssessionhash; 67 extern int nfsrv_sessionhashsize; 68 extern struct nfsstatsv1 nfsstatsv1; 69 extern struct nfslayouthash *nfslayouthash; 70 extern int nfsrv_layouthashsize; 71 extern struct mtx nfsrv_dslock_mtx; 72 extern int nfs_pnfsiothreads; 73 extern struct nfsdontlisthead nfsrv_dontlisthead; 74 extern volatile int nfsrv_dontlistlen; 75 extern volatile int nfsrv_devidcnt; 76 extern int nfsrv_maxpnfsmirror; 77 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 78 NFSDLOCKMUTEX; 79 NFSSTATESPINLOCK; 80 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 81 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 82 struct mtx nfsrc_udpmtx; 83 struct mtx nfs_v4root_mutex; 84 struct mtx nfsrv_dontlistlock_mtx; 85 struct mtx nfsrv_recalllock_mtx; 86 struct nfsrvfh nfs_rootfh, nfs_pubfh; 87 int nfs_pubfhset = 0, nfs_rootfhset = 0; 88 struct proc *nfsd_master_proc = NULL; 89 int nfsd_debuglevel = 0; 90 static pid_t nfsd_master_pid = (pid_t)-1; 91 static char nfsd_master_comm[MAXCOMLEN + 1]; 92 static struct timeval nfsd_master_start; 93 static uint32_t nfsv4_sysid = 0; 94 static fhandle_t zerofh; 95 96 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 97 struct ucred *); 98 99 int nfsrv_enable_crossmntpt = 1; 100 static int nfs_commit_blks; 101 static int nfs_commit_miss; 102 extern int nfsrv_issuedelegs; 103 extern int nfsrv_dolocallocks; 104 extern int nfsd_enable_stringtouid; 105 extern struct nfsdevicehead nfsrv_devidhead; 106 107 static void nfsrv_pnfscreate(struct vnode *, struct vattr *, struct ucred *, 108 NFSPROC_T *); 109 static void nfsrv_pnfsremovesetup(struct vnode *, NFSPROC_T *, struct vnode **, 110 int *, char *, fhandle_t *); 111 static void nfsrv_pnfsremove(struct vnode **, int, char *, fhandle_t *, 112 NFSPROC_T *); 113 static int nfsrv_proxyds(struct nfsrv_descript *, struct vnode *, off_t, int, 114 struct ucred *, struct thread *, int, struct mbuf **, char *, 115 struct mbuf **, struct nfsvattr *, struct acl *); 116 static int nfsrv_setextattr(struct vnode *, struct nfsvattr *, NFSPROC_T *); 117 static int nfsrv_readdsrpc(fhandle_t *, off_t, int, struct ucred *, 118 NFSPROC_T *, struct nfsmount *, struct mbuf **, struct mbuf **); 119 static int nfsrv_writedsrpc(fhandle_t *, off_t, int, struct ucred *, 120 NFSPROC_T *, struct vnode *, struct nfsmount **, int, struct mbuf **, 121 char *, int *); 122 static int nfsrv_setacldsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 123 struct vnode *, struct nfsmount **, int, struct acl *, int *); 124 static int nfsrv_setattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 125 struct vnode *, struct nfsmount **, int, struct nfsvattr *, int *); 126 static int nfsrv_getattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 127 struct vnode *, struct nfsmount *, struct nfsvattr *); 128 static int nfsrv_putfhname(fhandle_t *, char *); 129 static int nfsrv_pnfslookupds(struct vnode *, struct vnode *, 130 struct pnfsdsfile *, struct vnode **, NFSPROC_T *); 131 static void nfsrv_pnfssetfh(struct vnode *, struct pnfsdsfile *, char *, char *, 132 struct vnode *, NFSPROC_T *); 133 static int nfsrv_dsremove(struct vnode *, char *, struct ucred *, NFSPROC_T *); 134 static int nfsrv_dssetacl(struct vnode *, struct acl *, struct ucred *, 135 NFSPROC_T *); 136 static int nfsrv_pnfsstatfs(struct statfs *, struct mount *); 137 138 int nfs_pnfsio(task_fn_t *, void *); 139 140 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "NFS server"); 141 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 142 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 143 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 144 0, ""); 145 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 146 0, ""); 147 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 148 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 149 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 150 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 151 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 152 0, "Debug level for NFS server"); 153 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 154 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 155 static int nfsrv_pnfsgetdsattr = 1; 156 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsgetdsattr, CTLFLAG_RW, 157 &nfsrv_pnfsgetdsattr, 0, "When set getattr gets DS attributes via RPC"); 158 159 /* 160 * nfsrv_dsdirsize can only be increased and only when the nfsd threads are 161 * not running. 162 * The dsN subdirectories for the increased values must have been created 163 * on all DS servers before this increase is done. 164 */ 165 u_int nfsrv_dsdirsize = 20; 166 static int 167 sysctl_dsdirsize(SYSCTL_HANDLER_ARGS) 168 { 169 int error, newdsdirsize; 170 171 newdsdirsize = nfsrv_dsdirsize; 172 error = sysctl_handle_int(oidp, &newdsdirsize, 0, req); 173 if (error != 0 || req->newptr == NULL) 174 return (error); 175 if (newdsdirsize <= nfsrv_dsdirsize || newdsdirsize > 10000 || 176 newnfs_numnfsd != 0) 177 return (EINVAL); 178 nfsrv_dsdirsize = newdsdirsize; 179 return (0); 180 } 181 SYSCTL_PROC(_vfs_nfsd, OID_AUTO, dsdirsize, CTLTYPE_UINT | CTLFLAG_RW, 0, 182 sizeof(nfsrv_dsdirsize), sysctl_dsdirsize, "IU", 183 "Number of dsN subdirs on the DS servers"); 184 185 #define MAX_REORDERED_RPC 16 186 #define NUM_HEURISTIC 1031 187 #define NHUSE_INIT 64 188 #define NHUSE_INC 16 189 #define NHUSE_MAX 2048 190 191 static struct nfsheur { 192 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 193 off_t nh_nextoff; /* next offset for sequential detection */ 194 int nh_use; /* use count for selection */ 195 int nh_seqcount; /* heuristic */ 196 } nfsheur[NUM_HEURISTIC]; 197 198 199 /* 200 * Heuristic to detect sequential operation. 201 */ 202 static struct nfsheur * 203 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 204 { 205 struct nfsheur *nh; 206 int hi, try; 207 208 /* Locate best candidate. */ 209 try = 32; 210 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 211 nh = &nfsheur[hi]; 212 while (try--) { 213 if (nfsheur[hi].nh_vp == vp) { 214 nh = &nfsheur[hi]; 215 break; 216 } 217 if (nfsheur[hi].nh_use > 0) 218 --nfsheur[hi].nh_use; 219 hi = (hi + 1) % NUM_HEURISTIC; 220 if (nfsheur[hi].nh_use < nh->nh_use) 221 nh = &nfsheur[hi]; 222 } 223 224 /* Initialize hint if this is a new file. */ 225 if (nh->nh_vp != vp) { 226 nh->nh_vp = vp; 227 nh->nh_nextoff = uio->uio_offset; 228 nh->nh_use = NHUSE_INIT; 229 if (uio->uio_offset == 0) 230 nh->nh_seqcount = 4; 231 else 232 nh->nh_seqcount = 1; 233 } 234 235 /* Calculate heuristic. */ 236 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 237 uio->uio_offset == nh->nh_nextoff) { 238 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 239 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 240 if (nh->nh_seqcount > IO_SEQMAX) 241 nh->nh_seqcount = IO_SEQMAX; 242 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 243 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 244 /* Probably a reordered RPC, leave seqcount alone. */ 245 } else if (nh->nh_seqcount > 1) { 246 nh->nh_seqcount /= 2; 247 } else { 248 nh->nh_seqcount = 0; 249 } 250 nh->nh_use += NHUSE_INC; 251 if (nh->nh_use > NHUSE_MAX) 252 nh->nh_use = NHUSE_MAX; 253 return (nh); 254 } 255 256 /* 257 * Get attributes into nfsvattr structure. 258 */ 259 int 260 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, 261 struct nfsrv_descript *nd, struct thread *p, int vpislocked, 262 nfsattrbit_t *attrbitp) 263 { 264 int error, gotattr, lockedit = 0; 265 struct nfsvattr na; 266 267 if (vpislocked == 0) { 268 /* 269 * When vpislocked == 0, the vnode is either exclusively 270 * locked by this thread or not locked by this thread. 271 * As such, shared lock it, if not exclusively locked. 272 */ 273 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 274 lockedit = 1; 275 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 276 } 277 } 278 279 /* 280 * Acquire the Change, Size and TimeModify attributes, as required. 281 * This needs to be done for regular files if: 282 * - non-NFSv4 RPCs or 283 * - when attrbitp == NULL or 284 * - an NFSv4 RPC with any of the above attributes in attrbitp. 285 * A return of 0 for nfsrv_proxyds() indicates that it has acquired 286 * these attributes. nfsrv_proxyds() will return an error if the 287 * server is not a pNFS one. 288 */ 289 gotattr = 0; 290 if (vp->v_type == VREG && nfsrv_devidcnt > 0 && (attrbitp == NULL || 291 (nd->nd_flag & ND_NFSV4) == 0 || 292 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_CHANGE) || 293 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) || 294 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESS) || 295 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFY))) { 296 error = nfsrv_proxyds(nd, vp, 0, 0, nd->nd_cred, p, 297 NFSPROC_GETATTR, NULL, NULL, NULL, &na, NULL); 298 if (error == 0) 299 gotattr = 1; 300 } 301 302 error = VOP_GETATTR(vp, &nvap->na_vattr, nd->nd_cred); 303 if (lockedit != 0) 304 NFSVOPUNLOCK(vp, 0); 305 306 /* 307 * If we got the Change, Size and Modify Time from the DS, 308 * replace them. 309 */ 310 if (gotattr != 0) { 311 nvap->na_atime = na.na_atime; 312 nvap->na_mtime = na.na_mtime; 313 nvap->na_filerev = na.na_filerev; 314 nvap->na_size = na.na_size; 315 } 316 NFSD_DEBUG(4, "nfsvno_getattr: gotattr=%d err=%d chg=%ju\n", gotattr, 317 error, (uintmax_t)na.na_filerev); 318 319 NFSEXITCODE(error); 320 return (error); 321 } 322 323 /* 324 * Get a file handle for a vnode. 325 */ 326 int 327 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 328 { 329 int error; 330 331 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 332 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 333 error = VOP_VPTOFH(vp, &fhp->fh_fid); 334 335 NFSEXITCODE(error); 336 return (error); 337 } 338 339 /* 340 * Perform access checking for vnodes obtained from file handles that would 341 * refer to files already opened by a Unix client. You cannot just use 342 * vn_writechk() and VOP_ACCESSX() for two reasons. 343 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 344 * case. 345 * 2 - The owner is to be given access irrespective of mode bits for some 346 * operations, so that processes that chmod after opening a file don't 347 * break. 348 */ 349 int 350 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 351 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 352 u_int32_t *supportedtypep) 353 { 354 struct vattr vattr; 355 int error = 0, getret = 0; 356 357 if (vpislocked == 0) { 358 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 359 error = EPERM; 360 goto out; 361 } 362 } 363 if (accmode & VWRITE) { 364 /* Just vn_writechk() changed to check rdonly */ 365 /* 366 * Disallow write attempts on read-only file systems; 367 * unless the file is a socket or a block or character 368 * device resident on the file system. 369 */ 370 if (NFSVNO_EXRDONLY(exp) || 371 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 372 switch (vp->v_type) { 373 case VREG: 374 case VDIR: 375 case VLNK: 376 error = EROFS; 377 default: 378 break; 379 } 380 } 381 /* 382 * If there's shared text associated with 383 * the inode, try to free it up once. If 384 * we fail, we can't allow writing. 385 */ 386 if (VOP_IS_TEXT(vp) && error == 0) 387 error = ETXTBSY; 388 } 389 if (error != 0) { 390 if (vpislocked == 0) 391 NFSVOPUNLOCK(vp, 0); 392 goto out; 393 } 394 395 /* 396 * Should the override still be applied when ACLs are enabled? 397 */ 398 error = VOP_ACCESSX(vp, accmode, cred, p); 399 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 400 /* 401 * Try again with VEXPLICIT_DENY, to see if the test for 402 * deletion is supported. 403 */ 404 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 405 if (error == 0) { 406 if (vp->v_type == VDIR) { 407 accmode &= ~(VDELETE | VDELETE_CHILD); 408 accmode |= VWRITE; 409 error = VOP_ACCESSX(vp, accmode, cred, p); 410 } else if (supportedtypep != NULL) { 411 *supportedtypep &= ~NFSACCESS_DELETE; 412 } 413 } 414 } 415 416 /* 417 * Allow certain operations for the owner (reads and writes 418 * on files that are already open). 419 */ 420 if (override != NFSACCCHK_NOOVERRIDE && 421 (error == EPERM || error == EACCES)) { 422 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 423 error = 0; 424 else if (override & NFSACCCHK_ALLOWOWNER) { 425 getret = VOP_GETATTR(vp, &vattr, cred); 426 if (getret == 0 && cred->cr_uid == vattr.va_uid) 427 error = 0; 428 } 429 } 430 if (vpislocked == 0) 431 NFSVOPUNLOCK(vp, 0); 432 433 out: 434 NFSEXITCODE(error); 435 return (error); 436 } 437 438 /* 439 * Set attribute(s) vnop. 440 */ 441 int 442 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 443 struct thread *p, struct nfsexstuff *exp) 444 { 445 u_quad_t savsize = 0; 446 int error, savedit; 447 448 /* 449 * If this is an exported file system and a pNFS service is running, 450 * don't VOP_SETATTR() of size for the MDS file system. 451 */ 452 savedit = 0; 453 error = 0; 454 if (vp->v_type == VREG && (vp->v_mount->mnt_flag & MNT_EXPORTED) != 0 && 455 nfsrv_devidcnt != 0 && nvap->na_vattr.va_size != VNOVAL && 456 nvap->na_vattr.va_size > 0) { 457 savsize = nvap->na_vattr.va_size; 458 nvap->na_vattr.va_size = VNOVAL; 459 if (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 460 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 461 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 462 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 463 nvap->na_vattr.va_mtime.tv_sec != VNOVAL) 464 savedit = 1; 465 else 466 savedit = 2; 467 } 468 if (savedit != 2) 469 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 470 if (savedit != 0) 471 nvap->na_vattr.va_size = savsize; 472 if (error == 0 && (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 473 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 474 nvap->na_vattr.va_size != VNOVAL || 475 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 476 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 477 nvap->na_vattr.va_mtime.tv_sec != VNOVAL)) { 478 /* For a pNFS server, set the attributes on the DS file. */ 479 error = nfsrv_proxyds(NULL, vp, 0, 0, cred, p, NFSPROC_SETATTR, 480 NULL, NULL, NULL, nvap, NULL); 481 if (error == ENOENT) 482 error = 0; 483 } 484 NFSEXITCODE(error); 485 return (error); 486 } 487 488 /* 489 * Set up nameidata for a lookup() call and do it. 490 */ 491 int 492 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 493 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 494 struct vnode **retdirp) 495 { 496 struct componentname *cnp = &ndp->ni_cnd; 497 int i; 498 struct iovec aiov; 499 struct uio auio; 500 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 501 int error = 0; 502 char *cp; 503 504 *retdirp = NULL; 505 cnp->cn_nameptr = cnp->cn_pnbuf; 506 ndp->ni_lcf = 0; 507 /* 508 * Extract and set starting directory. 509 */ 510 if (dp->v_type != VDIR) { 511 if (islocked) 512 vput(dp); 513 else 514 vrele(dp); 515 nfsvno_relpathbuf(ndp); 516 error = ENOTDIR; 517 goto out1; 518 } 519 if (islocked) 520 NFSVOPUNLOCK(dp, 0); 521 VREF(dp); 522 *retdirp = dp; 523 if (NFSVNO_EXRDONLY(exp)) 524 cnp->cn_flags |= RDONLY; 525 ndp->ni_segflg = UIO_SYSSPACE; 526 527 if (nd->nd_flag & ND_PUBLOOKUP) { 528 ndp->ni_loopcnt = 0; 529 if (cnp->cn_pnbuf[0] == '/') { 530 vrele(dp); 531 /* 532 * Check for degenerate pathnames here, since lookup() 533 * panics on them. 534 */ 535 for (i = 1; i < ndp->ni_pathlen; i++) 536 if (cnp->cn_pnbuf[i] != '/') 537 break; 538 if (i == ndp->ni_pathlen) { 539 error = NFSERR_ACCES; 540 goto out; 541 } 542 dp = rootvnode; 543 VREF(dp); 544 } 545 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 546 (nd->nd_flag & ND_NFSV4) == 0) { 547 /* 548 * Only cross mount points for NFSv4 when doing a 549 * mount while traversing the file system above 550 * the mount point, unless nfsrv_enable_crossmntpt is set. 551 */ 552 cnp->cn_flags |= NOCROSSMOUNT; 553 } 554 555 /* 556 * Initialize for scan, set ni_startdir and bump ref on dp again 557 * because lookup() will dereference ni_startdir. 558 */ 559 560 cnp->cn_thread = p; 561 ndp->ni_startdir = dp; 562 ndp->ni_rootdir = rootvnode; 563 ndp->ni_topdir = NULL; 564 565 if (!lockleaf) 566 cnp->cn_flags |= LOCKLEAF; 567 for (;;) { 568 cnp->cn_nameptr = cnp->cn_pnbuf; 569 /* 570 * Call lookup() to do the real work. If an error occurs, 571 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 572 * we do not have to dereference anything before returning. 573 * In either case ni_startdir will be dereferenced and NULLed 574 * out. 575 */ 576 error = lookup(ndp); 577 if (error) 578 break; 579 580 /* 581 * Check for encountering a symbolic link. Trivial 582 * termination occurs if no symlink encountered. 583 */ 584 if ((cnp->cn_flags & ISSYMLINK) == 0) { 585 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 586 nfsvno_relpathbuf(ndp); 587 if (ndp->ni_vp && !lockleaf) 588 NFSVOPUNLOCK(ndp->ni_vp, 0); 589 break; 590 } 591 592 /* 593 * Validate symlink 594 */ 595 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 596 NFSVOPUNLOCK(ndp->ni_dvp, 0); 597 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 598 error = EINVAL; 599 goto badlink2; 600 } 601 602 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 603 error = ELOOP; 604 goto badlink2; 605 } 606 if (ndp->ni_pathlen > 1) 607 cp = uma_zalloc(namei_zone, M_WAITOK); 608 else 609 cp = cnp->cn_pnbuf; 610 aiov.iov_base = cp; 611 aiov.iov_len = MAXPATHLEN; 612 auio.uio_iov = &aiov; 613 auio.uio_iovcnt = 1; 614 auio.uio_offset = 0; 615 auio.uio_rw = UIO_READ; 616 auio.uio_segflg = UIO_SYSSPACE; 617 auio.uio_td = NULL; 618 auio.uio_resid = MAXPATHLEN; 619 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 620 if (error) { 621 badlink1: 622 if (ndp->ni_pathlen > 1) 623 uma_zfree(namei_zone, cp); 624 badlink2: 625 vrele(ndp->ni_dvp); 626 vput(ndp->ni_vp); 627 break; 628 } 629 linklen = MAXPATHLEN - auio.uio_resid; 630 if (linklen == 0) { 631 error = ENOENT; 632 goto badlink1; 633 } 634 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 635 error = ENAMETOOLONG; 636 goto badlink1; 637 } 638 639 /* 640 * Adjust or replace path 641 */ 642 if (ndp->ni_pathlen > 1) { 643 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 644 uma_zfree(namei_zone, cnp->cn_pnbuf); 645 cnp->cn_pnbuf = cp; 646 } else 647 cnp->cn_pnbuf[linklen] = '\0'; 648 ndp->ni_pathlen += linklen; 649 650 /* 651 * Cleanup refs for next loop and check if root directory 652 * should replace current directory. Normally ni_dvp 653 * becomes the new base directory and is cleaned up when 654 * we loop. Explicitly null pointers after invalidation 655 * to clarify operation. 656 */ 657 vput(ndp->ni_vp); 658 ndp->ni_vp = NULL; 659 660 if (cnp->cn_pnbuf[0] == '/') { 661 vrele(ndp->ni_dvp); 662 ndp->ni_dvp = ndp->ni_rootdir; 663 VREF(ndp->ni_dvp); 664 } 665 ndp->ni_startdir = ndp->ni_dvp; 666 ndp->ni_dvp = NULL; 667 } 668 if (!lockleaf) 669 cnp->cn_flags &= ~LOCKLEAF; 670 671 out: 672 if (error) { 673 nfsvno_relpathbuf(ndp); 674 ndp->ni_vp = NULL; 675 ndp->ni_dvp = NULL; 676 ndp->ni_startdir = NULL; 677 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 678 ndp->ni_dvp = NULL; 679 } 680 681 out1: 682 NFSEXITCODE2(error, nd); 683 return (error); 684 } 685 686 /* 687 * Set up a pathname buffer and return a pointer to it and, optionally 688 * set a hash pointer. 689 */ 690 void 691 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 692 { 693 struct componentname *cnp = &ndp->ni_cnd; 694 695 cnp->cn_flags |= (NOMACCHECK | HASBUF); 696 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 697 if (hashpp != NULL) 698 *hashpp = NULL; 699 *bufpp = cnp->cn_pnbuf; 700 } 701 702 /* 703 * Release the above path buffer, if not released by nfsvno_namei(). 704 */ 705 void 706 nfsvno_relpathbuf(struct nameidata *ndp) 707 { 708 709 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 710 panic("nfsrelpath"); 711 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 712 ndp->ni_cnd.cn_flags &= ~HASBUF; 713 } 714 715 /* 716 * Readlink vnode op into an mbuf list. 717 */ 718 int 719 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 720 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 721 { 722 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 723 struct iovec *ivp = iv; 724 struct uio io, *uiop = &io; 725 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 726 int i, len, tlen, error = 0; 727 728 len = 0; 729 i = 0; 730 while (len < NFS_MAXPATHLEN) { 731 NFSMGET(mp); 732 MCLGET(mp, M_WAITOK); 733 mp->m_len = M_SIZE(mp); 734 if (len == 0) { 735 mp3 = mp2 = mp; 736 } else { 737 mp2->m_next = mp; 738 mp2 = mp; 739 } 740 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 741 mp->m_len = NFS_MAXPATHLEN - len; 742 len = NFS_MAXPATHLEN; 743 } else { 744 len += mp->m_len; 745 } 746 ivp->iov_base = mtod(mp, caddr_t); 747 ivp->iov_len = mp->m_len; 748 i++; 749 ivp++; 750 } 751 uiop->uio_iov = iv; 752 uiop->uio_iovcnt = i; 753 uiop->uio_offset = 0; 754 uiop->uio_resid = len; 755 uiop->uio_rw = UIO_READ; 756 uiop->uio_segflg = UIO_SYSSPACE; 757 uiop->uio_td = NULL; 758 error = VOP_READLINK(vp, uiop, cred); 759 if (error) { 760 m_freem(mp3); 761 *lenp = 0; 762 goto out; 763 } 764 if (uiop->uio_resid > 0) { 765 len -= uiop->uio_resid; 766 tlen = NFSM_RNDUP(len); 767 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 768 } 769 *lenp = len; 770 *mpp = mp3; 771 *mpendp = mp; 772 773 out: 774 NFSEXITCODE(error); 775 return (error); 776 } 777 778 /* 779 * Read vnode op call into mbuf list. 780 */ 781 int 782 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 783 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 784 { 785 struct mbuf *m; 786 int i; 787 struct iovec *iv; 788 struct iovec *iv2; 789 int error = 0, len, left, siz, tlen, ioflag = 0; 790 struct mbuf *m2 = NULL, *m3; 791 struct uio io, *uiop = &io; 792 struct nfsheur *nh; 793 794 /* 795 * Attempt to read from a DS file. A return of ENOENT implies 796 * there is no DS file to read. 797 */ 798 error = nfsrv_proxyds(NULL, vp, off, cnt, cred, p, NFSPROC_READDS, mpp, 799 NULL, mpendp, NULL, NULL); 800 if (error != ENOENT) 801 return (error); 802 803 len = left = NFSM_RNDUP(cnt); 804 m3 = NULL; 805 /* 806 * Generate the mbuf list with the uio_iov ref. to it. 807 */ 808 i = 0; 809 while (left > 0) { 810 NFSMGET(m); 811 MCLGET(m, M_WAITOK); 812 m->m_len = 0; 813 siz = min(M_TRAILINGSPACE(m), left); 814 left -= siz; 815 i++; 816 if (m3) 817 m2->m_next = m; 818 else 819 m3 = m; 820 m2 = m; 821 } 822 iv = malloc(i * sizeof (struct iovec), 823 M_TEMP, M_WAITOK); 824 uiop->uio_iov = iv2 = iv; 825 m = m3; 826 left = len; 827 i = 0; 828 while (left > 0) { 829 if (m == NULL) 830 panic("nfsvno_read iov"); 831 siz = min(M_TRAILINGSPACE(m), left); 832 if (siz > 0) { 833 iv->iov_base = mtod(m, caddr_t) + m->m_len; 834 iv->iov_len = siz; 835 m->m_len += siz; 836 left -= siz; 837 iv++; 838 i++; 839 } 840 m = m->m_next; 841 } 842 uiop->uio_iovcnt = i; 843 uiop->uio_offset = off; 844 uiop->uio_resid = len; 845 uiop->uio_rw = UIO_READ; 846 uiop->uio_segflg = UIO_SYSSPACE; 847 uiop->uio_td = NULL; 848 nh = nfsrv_sequential_heuristic(uiop, vp); 849 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 850 /* XXX KDM make this more systematic? */ 851 nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid; 852 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 853 free(iv2, M_TEMP); 854 if (error) { 855 m_freem(m3); 856 *mpp = NULL; 857 goto out; 858 } 859 nh->nh_nextoff = uiop->uio_offset; 860 tlen = len - uiop->uio_resid; 861 cnt = cnt < tlen ? cnt : tlen; 862 tlen = NFSM_RNDUP(cnt); 863 if (tlen == 0) { 864 m_freem(m3); 865 m3 = NULL; 866 } else if (len != tlen || tlen != cnt) 867 nfsrv_adj(m3, len - tlen, tlen - cnt); 868 *mpp = m3; 869 *mpendp = m2; 870 871 out: 872 NFSEXITCODE(error); 873 return (error); 874 } 875 876 /* 877 * Write vnode op from an mbuf list. 878 */ 879 int 880 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int *stable, 881 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 882 { 883 struct iovec *ivp; 884 int i, len; 885 struct iovec *iv; 886 int ioflags, error; 887 struct uio io, *uiop = &io; 888 struct nfsheur *nh; 889 890 /* 891 * Attempt to write to a DS file. A return of ENOENT implies 892 * there is no DS file to write. 893 */ 894 error = nfsrv_proxyds(NULL, vp, off, retlen, cred, p, NFSPROC_WRITEDS, 895 &mp, cp, NULL, NULL, NULL); 896 if (error != ENOENT) { 897 *stable = NFSWRITE_FILESYNC; 898 return (error); 899 } 900 901 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, 902 M_WAITOK); 903 uiop->uio_iov = iv = ivp; 904 uiop->uio_iovcnt = cnt; 905 i = mtod(mp, caddr_t) + mp->m_len - cp; 906 len = retlen; 907 while (len > 0) { 908 if (mp == NULL) 909 panic("nfsvno_write"); 910 if (i > 0) { 911 i = min(i, len); 912 ivp->iov_base = cp; 913 ivp->iov_len = i; 914 ivp++; 915 len -= i; 916 } 917 mp = mp->m_next; 918 if (mp) { 919 i = mp->m_len; 920 cp = mtod(mp, caddr_t); 921 } 922 } 923 924 if (*stable == NFSWRITE_UNSTABLE) 925 ioflags = IO_NODELOCKED; 926 else 927 ioflags = (IO_SYNC | IO_NODELOCKED); 928 uiop->uio_resid = retlen; 929 uiop->uio_rw = UIO_WRITE; 930 uiop->uio_segflg = UIO_SYSSPACE; 931 NFSUIOPROC(uiop, p); 932 uiop->uio_offset = off; 933 nh = nfsrv_sequential_heuristic(uiop, vp); 934 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 935 /* XXX KDM make this more systematic? */ 936 nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid; 937 error = VOP_WRITE(vp, uiop, ioflags, cred); 938 if (error == 0) 939 nh->nh_nextoff = uiop->uio_offset; 940 free(iv, M_TEMP); 941 942 NFSEXITCODE(error); 943 return (error); 944 } 945 946 /* 947 * Common code for creating a regular file (plus special files for V2). 948 */ 949 int 950 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 951 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 952 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 953 { 954 u_quad_t tempsize; 955 int error; 956 957 error = nd->nd_repstat; 958 if (!error && ndp->ni_vp == NULL) { 959 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 960 vrele(ndp->ni_startdir); 961 error = VOP_CREATE(ndp->ni_dvp, 962 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 963 /* For a pNFS server, create the data file on a DS. */ 964 if (error == 0 && nvap->na_type == VREG) { 965 /* 966 * Create a data file on a DS for a pNFS server. 967 * This function just returns if not 968 * running a pNFS DS or the creation fails. 969 */ 970 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 971 nd->nd_cred, p); 972 } 973 vput(ndp->ni_dvp); 974 nfsvno_relpathbuf(ndp); 975 if (!error) { 976 if (*exclusive_flagp) { 977 *exclusive_flagp = 0; 978 NFSVNO_ATTRINIT(nvap); 979 nvap->na_atime.tv_sec = cverf[0]; 980 nvap->na_atime.tv_nsec = cverf[1]; 981 error = VOP_SETATTR(ndp->ni_vp, 982 &nvap->na_vattr, nd->nd_cred); 983 if (error != 0) { 984 vput(ndp->ni_vp); 985 ndp->ni_vp = NULL; 986 error = NFSERR_NOTSUPP; 987 } 988 } 989 } 990 /* 991 * NFS V2 Only. nfsrvd_mknod() does this for V3. 992 * (This implies, just get out on an error.) 993 */ 994 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 995 nvap->na_type == VFIFO) { 996 if (nvap->na_type == VCHR && rdev == 0xffffffff) 997 nvap->na_type = VFIFO; 998 if (nvap->na_type != VFIFO && 999 (error = priv_check_cred(nd->nd_cred, PRIV_VFS_MKNOD_DEV))) { 1000 vrele(ndp->ni_startdir); 1001 nfsvno_relpathbuf(ndp); 1002 vput(ndp->ni_dvp); 1003 goto out; 1004 } 1005 nvap->na_rdev = rdev; 1006 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1007 &ndp->ni_cnd, &nvap->na_vattr); 1008 vput(ndp->ni_dvp); 1009 nfsvno_relpathbuf(ndp); 1010 vrele(ndp->ni_startdir); 1011 if (error) 1012 goto out; 1013 } else { 1014 vrele(ndp->ni_startdir); 1015 nfsvno_relpathbuf(ndp); 1016 vput(ndp->ni_dvp); 1017 error = ENXIO; 1018 goto out; 1019 } 1020 *vpp = ndp->ni_vp; 1021 } else { 1022 /* 1023 * Handle cases where error is already set and/or 1024 * the file exists. 1025 * 1 - clean up the lookup 1026 * 2 - iff !error and na_size set, truncate it 1027 */ 1028 vrele(ndp->ni_startdir); 1029 nfsvno_relpathbuf(ndp); 1030 *vpp = ndp->ni_vp; 1031 if (ndp->ni_dvp == *vpp) 1032 vrele(ndp->ni_dvp); 1033 else 1034 vput(ndp->ni_dvp); 1035 if (!error && nvap->na_size != VNOVAL) { 1036 error = nfsvno_accchk(*vpp, VWRITE, 1037 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1038 NFSACCCHK_VPISLOCKED, NULL); 1039 if (!error) { 1040 tempsize = nvap->na_size; 1041 NFSVNO_ATTRINIT(nvap); 1042 nvap->na_size = tempsize; 1043 error = VOP_SETATTR(*vpp, 1044 &nvap->na_vattr, nd->nd_cred); 1045 } 1046 } 1047 if (error) 1048 vput(*vpp); 1049 } 1050 1051 out: 1052 NFSEXITCODE(error); 1053 return (error); 1054 } 1055 1056 /* 1057 * Do a mknod vnode op. 1058 */ 1059 int 1060 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 1061 struct thread *p) 1062 { 1063 int error = 0; 1064 enum vtype vtyp; 1065 1066 vtyp = nvap->na_type; 1067 /* 1068 * Iff doesn't exist, create it. 1069 */ 1070 if (ndp->ni_vp) { 1071 vrele(ndp->ni_startdir); 1072 nfsvno_relpathbuf(ndp); 1073 vput(ndp->ni_dvp); 1074 vrele(ndp->ni_vp); 1075 error = EEXIST; 1076 goto out; 1077 } 1078 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1079 vrele(ndp->ni_startdir); 1080 nfsvno_relpathbuf(ndp); 1081 vput(ndp->ni_dvp); 1082 error = NFSERR_BADTYPE; 1083 goto out; 1084 } 1085 if (vtyp == VSOCK) { 1086 vrele(ndp->ni_startdir); 1087 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 1088 &ndp->ni_cnd, &nvap->na_vattr); 1089 vput(ndp->ni_dvp); 1090 nfsvno_relpathbuf(ndp); 1091 } else { 1092 if (nvap->na_type != VFIFO && 1093 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV))) { 1094 vrele(ndp->ni_startdir); 1095 nfsvno_relpathbuf(ndp); 1096 vput(ndp->ni_dvp); 1097 goto out; 1098 } 1099 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1100 &ndp->ni_cnd, &nvap->na_vattr); 1101 vput(ndp->ni_dvp); 1102 nfsvno_relpathbuf(ndp); 1103 vrele(ndp->ni_startdir); 1104 /* 1105 * Since VOP_MKNOD returns the ni_vp, I can't 1106 * see any reason to do the lookup. 1107 */ 1108 } 1109 1110 out: 1111 NFSEXITCODE(error); 1112 return (error); 1113 } 1114 1115 /* 1116 * Mkdir vnode op. 1117 */ 1118 int 1119 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 1120 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 1121 { 1122 int error = 0; 1123 1124 if (ndp->ni_vp != NULL) { 1125 if (ndp->ni_dvp == ndp->ni_vp) 1126 vrele(ndp->ni_dvp); 1127 else 1128 vput(ndp->ni_dvp); 1129 vrele(ndp->ni_vp); 1130 nfsvno_relpathbuf(ndp); 1131 error = EEXIST; 1132 goto out; 1133 } 1134 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1135 &nvap->na_vattr); 1136 vput(ndp->ni_dvp); 1137 nfsvno_relpathbuf(ndp); 1138 1139 out: 1140 NFSEXITCODE(error); 1141 return (error); 1142 } 1143 1144 /* 1145 * symlink vnode op. 1146 */ 1147 int 1148 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 1149 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 1150 struct nfsexstuff *exp) 1151 { 1152 int error = 0; 1153 1154 if (ndp->ni_vp) { 1155 vrele(ndp->ni_startdir); 1156 nfsvno_relpathbuf(ndp); 1157 if (ndp->ni_dvp == ndp->ni_vp) 1158 vrele(ndp->ni_dvp); 1159 else 1160 vput(ndp->ni_dvp); 1161 vrele(ndp->ni_vp); 1162 error = EEXIST; 1163 goto out; 1164 } 1165 1166 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1167 &nvap->na_vattr, pathcp); 1168 vput(ndp->ni_dvp); 1169 vrele(ndp->ni_startdir); 1170 nfsvno_relpathbuf(ndp); 1171 /* 1172 * Although FreeBSD still had the lookup code in 1173 * it for 7/current, there doesn't seem to be any 1174 * point, since VOP_SYMLINK() returns the ni_vp. 1175 * Just vput it for v2. 1176 */ 1177 if (!not_v2 && !error) 1178 vput(ndp->ni_vp); 1179 1180 out: 1181 NFSEXITCODE(error); 1182 return (error); 1183 } 1184 1185 /* 1186 * Parse symbolic link arguments. 1187 * This function has an ugly side effect. It will malloc() an area for 1188 * the symlink and set iov_base to point to it, only if it succeeds. 1189 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1190 * be FREE'd later. 1191 */ 1192 int 1193 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1194 struct thread *p, char **pathcpp, int *lenp) 1195 { 1196 u_int32_t *tl; 1197 char *pathcp = NULL; 1198 int error = 0, len; 1199 struct nfsv2_sattr *sp; 1200 1201 *pathcpp = NULL; 1202 *lenp = 0; 1203 if ((nd->nd_flag & ND_NFSV3) && 1204 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1205 goto nfsmout; 1206 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1207 len = fxdr_unsigned(int, *tl); 1208 if (len > NFS_MAXPATHLEN || len <= 0) { 1209 error = EBADRPC; 1210 goto nfsmout; 1211 } 1212 pathcp = malloc(len + 1, M_TEMP, M_WAITOK); 1213 error = nfsrv_mtostr(nd, pathcp, len); 1214 if (error) 1215 goto nfsmout; 1216 if (nd->nd_flag & ND_NFSV2) { 1217 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1218 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1219 } 1220 *pathcpp = pathcp; 1221 *lenp = len; 1222 NFSEXITCODE2(0, nd); 1223 return (0); 1224 nfsmout: 1225 if (pathcp) 1226 free(pathcp, M_TEMP); 1227 NFSEXITCODE2(error, nd); 1228 return (error); 1229 } 1230 1231 /* 1232 * Remove a non-directory object. 1233 */ 1234 int 1235 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1236 struct thread *p, struct nfsexstuff *exp) 1237 { 1238 struct vnode *vp, *dsdvp[NFSDEV_MAXMIRRORS]; 1239 int error = 0, mirrorcnt; 1240 char fname[PNFS_FILENAME_LEN + 1]; 1241 fhandle_t fh; 1242 1243 vp = ndp->ni_vp; 1244 dsdvp[0] = NULL; 1245 if (vp->v_type == VDIR) 1246 error = NFSERR_ISDIR; 1247 else if (is_v4) 1248 error = nfsrv_checkremove(vp, 1, p); 1249 if (error == 0) 1250 nfsrv_pnfsremovesetup(vp, p, dsdvp, &mirrorcnt, fname, &fh); 1251 if (!error) 1252 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1253 if (error == 0 && dsdvp[0] != NULL) 1254 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1255 if (ndp->ni_dvp == vp) 1256 vrele(ndp->ni_dvp); 1257 else 1258 vput(ndp->ni_dvp); 1259 vput(vp); 1260 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1261 nfsvno_relpathbuf(ndp); 1262 NFSEXITCODE(error); 1263 return (error); 1264 } 1265 1266 /* 1267 * Remove a directory. 1268 */ 1269 int 1270 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1271 struct thread *p, struct nfsexstuff *exp) 1272 { 1273 struct vnode *vp; 1274 int error = 0; 1275 1276 vp = ndp->ni_vp; 1277 if (vp->v_type != VDIR) { 1278 error = ENOTDIR; 1279 goto out; 1280 } 1281 /* 1282 * No rmdir "." please. 1283 */ 1284 if (ndp->ni_dvp == vp) { 1285 error = EINVAL; 1286 goto out; 1287 } 1288 /* 1289 * The root of a mounted filesystem cannot be deleted. 1290 */ 1291 if (vp->v_vflag & VV_ROOT) 1292 error = EBUSY; 1293 out: 1294 if (!error) 1295 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1296 if (ndp->ni_dvp == vp) 1297 vrele(ndp->ni_dvp); 1298 else 1299 vput(ndp->ni_dvp); 1300 vput(vp); 1301 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1302 nfsvno_relpathbuf(ndp); 1303 NFSEXITCODE(error); 1304 return (error); 1305 } 1306 1307 /* 1308 * Rename vnode op. 1309 */ 1310 int 1311 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1312 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1313 { 1314 struct vnode *fvp, *tvp, *tdvp, *dsdvp[NFSDEV_MAXMIRRORS]; 1315 int error = 0, mirrorcnt; 1316 char fname[PNFS_FILENAME_LEN + 1]; 1317 fhandle_t fh; 1318 1319 dsdvp[0] = NULL; 1320 fvp = fromndp->ni_vp; 1321 if (ndstat) { 1322 vrele(fromndp->ni_dvp); 1323 vrele(fvp); 1324 error = ndstat; 1325 goto out1; 1326 } 1327 tdvp = tondp->ni_dvp; 1328 tvp = tondp->ni_vp; 1329 if (tvp != NULL) { 1330 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1331 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1332 goto out; 1333 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1334 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1335 goto out; 1336 } 1337 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1338 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1339 goto out; 1340 } 1341 1342 /* 1343 * A rename to '.' or '..' results in a prematurely 1344 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1345 * here. 1346 */ 1347 if ((tondp->ni_cnd.cn_namelen == 1 && 1348 tondp->ni_cnd.cn_nameptr[0] == '.') || 1349 (tondp->ni_cnd.cn_namelen == 2 && 1350 tondp->ni_cnd.cn_nameptr[0] == '.' && 1351 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1352 error = EINVAL; 1353 goto out; 1354 } 1355 } 1356 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1357 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1358 goto out; 1359 } 1360 if (fvp->v_mount != tdvp->v_mount) { 1361 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1362 goto out; 1363 } 1364 if (fvp == tdvp) { 1365 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1366 goto out; 1367 } 1368 if (fvp == tvp) { 1369 /* 1370 * If source and destination are the same, there is nothing to 1371 * do. Set error to -1 to indicate this. 1372 */ 1373 error = -1; 1374 goto out; 1375 } 1376 if (ndflag & ND_NFSV4) { 1377 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1378 error = nfsrv_checkremove(fvp, 0, p); 1379 NFSVOPUNLOCK(fvp, 0); 1380 } else 1381 error = EPERM; 1382 if (tvp && !error) 1383 error = nfsrv_checkremove(tvp, 1, p); 1384 } else { 1385 /* 1386 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1387 * that the NFSv4 client won't be confused by the rename. 1388 * Since nfsd_recalldelegation() can only be called on an 1389 * unlocked vnode at this point and fvp is the file that will 1390 * still exist after the rename, just do fvp. 1391 */ 1392 nfsd_recalldelegation(fvp, p); 1393 } 1394 if (error == 0 && tvp != NULL) { 1395 nfsrv_pnfsremovesetup(tvp, p, dsdvp, &mirrorcnt, fname, &fh); 1396 NFSD_DEBUG(4, "nfsvno_rename: pnfsremovesetup" 1397 " dsdvp=%p\n", dsdvp[0]); 1398 } 1399 out: 1400 if (!error) { 1401 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1402 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1403 &tondp->ni_cnd); 1404 } else { 1405 if (tdvp == tvp) 1406 vrele(tdvp); 1407 else 1408 vput(tdvp); 1409 if (tvp) 1410 vput(tvp); 1411 vrele(fromndp->ni_dvp); 1412 vrele(fvp); 1413 if (error == -1) 1414 error = 0; 1415 } 1416 1417 /* 1418 * If dsdvp[0] != NULL, it was set up by nfsrv_pnfsremovesetup() and 1419 * if the rename succeeded, the DS file for the tvp needs to be 1420 * removed. 1421 */ 1422 if (error == 0 && dsdvp[0] != NULL) { 1423 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1424 NFSD_DEBUG(4, "nfsvno_rename: pnfsremove\n"); 1425 } 1426 1427 vrele(tondp->ni_startdir); 1428 nfsvno_relpathbuf(tondp); 1429 out1: 1430 vrele(fromndp->ni_startdir); 1431 nfsvno_relpathbuf(fromndp); 1432 NFSEXITCODE(error); 1433 return (error); 1434 } 1435 1436 /* 1437 * Link vnode op. 1438 */ 1439 int 1440 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1441 struct thread *p, struct nfsexstuff *exp) 1442 { 1443 struct vnode *xp; 1444 int error = 0; 1445 1446 xp = ndp->ni_vp; 1447 if (xp != NULL) { 1448 error = EEXIST; 1449 } else { 1450 xp = ndp->ni_dvp; 1451 if (vp->v_mount != xp->v_mount) 1452 error = EXDEV; 1453 } 1454 if (!error) { 1455 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1456 if ((vp->v_iflag & VI_DOOMED) == 0) 1457 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1458 else 1459 error = EPERM; 1460 if (ndp->ni_dvp == vp) 1461 vrele(ndp->ni_dvp); 1462 else 1463 vput(ndp->ni_dvp); 1464 NFSVOPUNLOCK(vp, 0); 1465 } else { 1466 if (ndp->ni_dvp == ndp->ni_vp) 1467 vrele(ndp->ni_dvp); 1468 else 1469 vput(ndp->ni_dvp); 1470 if (ndp->ni_vp) 1471 vrele(ndp->ni_vp); 1472 } 1473 nfsvno_relpathbuf(ndp); 1474 NFSEXITCODE(error); 1475 return (error); 1476 } 1477 1478 /* 1479 * Do the fsync() appropriate for the commit. 1480 */ 1481 int 1482 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1483 struct thread *td) 1484 { 1485 int error = 0; 1486 1487 /* 1488 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1489 * file is done. At this time VOP_FSYNC does not accept offset and 1490 * byte count parameters so call VOP_FSYNC the whole file for now. 1491 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1492 * File systems that do not use the buffer cache (as indicated 1493 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1494 */ 1495 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1496 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1497 /* 1498 * Give up and do the whole thing 1499 */ 1500 if (vp->v_object && 1501 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1502 VM_OBJECT_WLOCK(vp->v_object); 1503 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1504 VM_OBJECT_WUNLOCK(vp->v_object); 1505 } 1506 error = VOP_FSYNC(vp, MNT_WAIT, td); 1507 } else { 1508 /* 1509 * Locate and synchronously write any buffers that fall 1510 * into the requested range. Note: we are assuming that 1511 * f_iosize is a power of 2. 1512 */ 1513 int iosize = vp->v_mount->mnt_stat.f_iosize; 1514 int iomask = iosize - 1; 1515 struct bufobj *bo; 1516 daddr_t lblkno; 1517 1518 /* 1519 * Align to iosize boundary, super-align to page boundary. 1520 */ 1521 if (off & iomask) { 1522 cnt += off & iomask; 1523 off &= ~(u_quad_t)iomask; 1524 } 1525 if (off & PAGE_MASK) { 1526 cnt += off & PAGE_MASK; 1527 off &= ~(u_quad_t)PAGE_MASK; 1528 } 1529 lblkno = off / iosize; 1530 1531 if (vp->v_object && 1532 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1533 VM_OBJECT_WLOCK(vp->v_object); 1534 vm_object_page_clean(vp->v_object, off, off + cnt, 1535 OBJPC_SYNC); 1536 VM_OBJECT_WUNLOCK(vp->v_object); 1537 } 1538 1539 bo = &vp->v_bufobj; 1540 BO_LOCK(bo); 1541 while (cnt > 0) { 1542 struct buf *bp; 1543 1544 /* 1545 * If we have a buffer and it is marked B_DELWRI we 1546 * have to lock and write it. Otherwise the prior 1547 * write is assumed to have already been committed. 1548 * 1549 * gbincore() can return invalid buffers now so we 1550 * have to check that bit as well (though B_DELWRI 1551 * should not be set if B_INVAL is set there could be 1552 * a race here since we haven't locked the buffer). 1553 */ 1554 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1555 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1556 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1557 BO_LOCK(bo); 1558 continue; /* retry */ 1559 } 1560 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1561 B_DELWRI) { 1562 bremfree(bp); 1563 bp->b_flags &= ~B_ASYNC; 1564 bwrite(bp); 1565 ++nfs_commit_miss; 1566 } else 1567 BUF_UNLOCK(bp); 1568 BO_LOCK(bo); 1569 } 1570 ++nfs_commit_blks; 1571 if (cnt < iosize) 1572 break; 1573 cnt -= iosize; 1574 ++lblkno; 1575 } 1576 BO_UNLOCK(bo); 1577 } 1578 NFSEXITCODE(error); 1579 return (error); 1580 } 1581 1582 /* 1583 * Statfs vnode op. 1584 */ 1585 int 1586 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1587 { 1588 struct statfs *tsf; 1589 int error; 1590 1591 tsf = NULL; 1592 if (nfsrv_devidcnt > 0) { 1593 /* For a pNFS service, get the DS numbers. */ 1594 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK | M_ZERO); 1595 error = nfsrv_pnfsstatfs(tsf, vp->v_mount); 1596 if (error != 0) { 1597 free(tsf, M_TEMP); 1598 tsf = NULL; 1599 } 1600 } 1601 error = VFS_STATFS(vp->v_mount, sf); 1602 if (error == 0) { 1603 if (tsf != NULL) { 1604 sf->f_blocks = tsf->f_blocks; 1605 sf->f_bavail = tsf->f_bavail; 1606 sf->f_bfree = tsf->f_bfree; 1607 sf->f_bsize = tsf->f_bsize; 1608 } 1609 /* 1610 * Since NFS handles these values as unsigned on the 1611 * wire, there is no way to represent negative values, 1612 * so set them to 0. Without this, they will appear 1613 * to be very large positive values for clients like 1614 * Solaris10. 1615 */ 1616 if (sf->f_bavail < 0) 1617 sf->f_bavail = 0; 1618 if (sf->f_ffree < 0) 1619 sf->f_ffree = 0; 1620 } 1621 free(tsf, M_TEMP); 1622 NFSEXITCODE(error); 1623 return (error); 1624 } 1625 1626 /* 1627 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1628 * must handle nfsrv_opencheck() calls after any other access checks. 1629 */ 1630 void 1631 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1632 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1633 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1634 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1635 struct nfsexstuff *exp, struct vnode **vpp) 1636 { 1637 struct vnode *vp = NULL; 1638 u_quad_t tempsize; 1639 struct nfsexstuff nes; 1640 1641 if (ndp->ni_vp == NULL) 1642 nd->nd_repstat = nfsrv_opencheck(clientid, 1643 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1644 if (!nd->nd_repstat) { 1645 if (ndp->ni_vp == NULL) { 1646 vrele(ndp->ni_startdir); 1647 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1648 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1649 /* For a pNFS server, create the data file on a DS. */ 1650 if (nd->nd_repstat == 0) { 1651 /* 1652 * Create a data file on a DS for a pNFS server. 1653 * This function just returns if not 1654 * running a pNFS DS or the creation fails. 1655 */ 1656 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1657 cred, p); 1658 } 1659 vput(ndp->ni_dvp); 1660 nfsvno_relpathbuf(ndp); 1661 if (!nd->nd_repstat) { 1662 if (*exclusive_flagp) { 1663 *exclusive_flagp = 0; 1664 NFSVNO_ATTRINIT(nvap); 1665 nvap->na_atime.tv_sec = cverf[0]; 1666 nvap->na_atime.tv_nsec = cverf[1]; 1667 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1668 &nvap->na_vattr, cred); 1669 if (nd->nd_repstat != 0) { 1670 vput(ndp->ni_vp); 1671 ndp->ni_vp = NULL; 1672 nd->nd_repstat = NFSERR_NOTSUPP; 1673 } else 1674 NFSSETBIT_ATTRBIT(attrbitp, 1675 NFSATTRBIT_TIMEACCESS); 1676 } else { 1677 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1678 aclp, p, attrbitp, exp); 1679 } 1680 } 1681 vp = ndp->ni_vp; 1682 } else { 1683 if (ndp->ni_startdir) 1684 vrele(ndp->ni_startdir); 1685 nfsvno_relpathbuf(ndp); 1686 vp = ndp->ni_vp; 1687 if (create == NFSV4OPEN_CREATE) { 1688 if (ndp->ni_dvp == vp) 1689 vrele(ndp->ni_dvp); 1690 else 1691 vput(ndp->ni_dvp); 1692 } 1693 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1694 if (ndp->ni_cnd.cn_flags & RDONLY) 1695 NFSVNO_SETEXRDONLY(&nes); 1696 else 1697 NFSVNO_EXINIT(&nes); 1698 nd->nd_repstat = nfsvno_accchk(vp, 1699 VWRITE, cred, &nes, p, 1700 NFSACCCHK_NOOVERRIDE, 1701 NFSACCCHK_VPISLOCKED, NULL); 1702 nd->nd_repstat = nfsrv_opencheck(clientid, 1703 stateidp, stp, vp, nd, p, nd->nd_repstat); 1704 if (!nd->nd_repstat) { 1705 tempsize = nvap->na_size; 1706 NFSVNO_ATTRINIT(nvap); 1707 nvap->na_size = tempsize; 1708 nd->nd_repstat = VOP_SETATTR(vp, 1709 &nvap->na_vattr, cred); 1710 } 1711 } else if (vp->v_type == VREG) { 1712 nd->nd_repstat = nfsrv_opencheck(clientid, 1713 stateidp, stp, vp, nd, p, nd->nd_repstat); 1714 } 1715 } 1716 } else { 1717 if (ndp->ni_cnd.cn_flags & HASBUF) 1718 nfsvno_relpathbuf(ndp); 1719 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1720 vrele(ndp->ni_startdir); 1721 if (ndp->ni_dvp == ndp->ni_vp) 1722 vrele(ndp->ni_dvp); 1723 else 1724 vput(ndp->ni_dvp); 1725 if (ndp->ni_vp) 1726 vput(ndp->ni_vp); 1727 } 1728 } 1729 *vpp = vp; 1730 1731 NFSEXITCODE2(0, nd); 1732 } 1733 1734 /* 1735 * Updates the file rev and sets the mtime and ctime 1736 * to the current clock time, returning the va_filerev and va_Xtime 1737 * values. 1738 * Return ESTALE to indicate the vnode is VI_DOOMED. 1739 */ 1740 int 1741 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1742 struct nfsrv_descript *nd, struct thread *p) 1743 { 1744 struct vattr va; 1745 1746 VATTR_NULL(&va); 1747 vfs_timestamp(&va.va_mtime); 1748 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1749 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1750 if ((vp->v_iflag & VI_DOOMED) != 0) 1751 return (ESTALE); 1752 } 1753 (void) VOP_SETATTR(vp, &va, nd->nd_cred); 1754 (void) nfsvno_getattr(vp, nvap, nd, p, 1, NULL); 1755 return (0); 1756 } 1757 1758 /* 1759 * Glue routine to nfsv4_fillattr(). 1760 */ 1761 int 1762 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1763 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1764 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1765 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1766 { 1767 struct statfs *sf; 1768 int error; 1769 1770 sf = NULL; 1771 if (nfsrv_devidcnt > 0 && 1772 (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEAVAIL) || 1773 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEFREE) || 1774 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACETOTAL))) { 1775 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK | M_ZERO); 1776 error = nfsrv_pnfsstatfs(sf, mp); 1777 if (error != 0) { 1778 free(sf, M_TEMP); 1779 sf = NULL; 1780 } 1781 } 1782 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1783 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1784 mounted_on_fileno, sf); 1785 free(sf, M_TEMP); 1786 NFSEXITCODE2(0, nd); 1787 return (error); 1788 } 1789 1790 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1791 /* 1792 * nfs readdir service 1793 * - mallocs what it thinks is enough to read 1794 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1795 * - calls VOP_READDIR() 1796 * - loops around building the reply 1797 * if the output generated exceeds count break out of loop 1798 * The NFSM_CLGET macro is used here so that the reply will be packed 1799 * tightly in mbuf clusters. 1800 * - it trims out records with d_fileno == 0 1801 * this doesn't matter for Unix clients, but they might confuse clients 1802 * for other os'. 1803 * - it trims out records with d_type == DT_WHT 1804 * these cannot be seen through NFS (unless we extend the protocol) 1805 * The alternate call nfsrvd_readdirplus() does lookups as well. 1806 * PS: The NFS protocol spec. does not clarify what the "count" byte 1807 * argument is a count of.. just name strings and file id's or the 1808 * entire reply rpc or ... 1809 * I tried just file name and id sizes and it confused the Sun client, 1810 * so I am using the full rpc size now. The "paranoia.." comment refers 1811 * to including the status longwords that are not a part of the dir. 1812 * "entry" structures, but are in the rpc. 1813 */ 1814 int 1815 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1816 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1817 { 1818 struct dirent *dp; 1819 u_int32_t *tl; 1820 int dirlen; 1821 char *cpos, *cend, *rbuf; 1822 struct nfsvattr at; 1823 int nlen, error = 0, getret = 1; 1824 int siz, cnt, fullsiz, eofflag, ncookies; 1825 u_int64_t off, toff, verf __unused; 1826 u_long *cookies = NULL, *cookiep; 1827 struct uio io; 1828 struct iovec iv; 1829 int is_ufs; 1830 1831 if (nd->nd_repstat) { 1832 nfsrv_postopattr(nd, getret, &at); 1833 goto out; 1834 } 1835 if (nd->nd_flag & ND_NFSV2) { 1836 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1837 off = fxdr_unsigned(u_quad_t, *tl++); 1838 } else { 1839 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1840 off = fxdr_hyper(tl); 1841 tl += 2; 1842 verf = fxdr_hyper(tl); 1843 tl += 2; 1844 } 1845 toff = off; 1846 cnt = fxdr_unsigned(int, *tl); 1847 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1848 cnt = NFS_SRVMAXDATA(nd); 1849 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1850 fullsiz = siz; 1851 if (nd->nd_flag & ND_NFSV3) { 1852 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, 1853 NULL); 1854 #if 0 1855 /* 1856 * va_filerev is not sufficient as a cookie verifier, 1857 * since it is not supposed to change when entries are 1858 * removed/added unless that offset cookies returned to 1859 * the client are no longer valid. 1860 */ 1861 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1862 nd->nd_repstat = NFSERR_BAD_COOKIE; 1863 #endif 1864 } 1865 if (!nd->nd_repstat && vp->v_type != VDIR) 1866 nd->nd_repstat = NFSERR_NOTDIR; 1867 if (nd->nd_repstat == 0 && cnt == 0) { 1868 if (nd->nd_flag & ND_NFSV2) 1869 /* NFSv2 does not have NFSERR_TOOSMALL */ 1870 nd->nd_repstat = EPERM; 1871 else 1872 nd->nd_repstat = NFSERR_TOOSMALL; 1873 } 1874 if (!nd->nd_repstat) 1875 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1876 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1877 NFSACCCHK_VPISLOCKED, NULL); 1878 if (nd->nd_repstat) { 1879 vput(vp); 1880 if (nd->nd_flag & ND_NFSV3) 1881 nfsrv_postopattr(nd, getret, &at); 1882 goto out; 1883 } 1884 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1885 rbuf = malloc(siz, M_TEMP, M_WAITOK); 1886 again: 1887 eofflag = 0; 1888 if (cookies) { 1889 free(cookies, M_TEMP); 1890 cookies = NULL; 1891 } 1892 1893 iv.iov_base = rbuf; 1894 iv.iov_len = siz; 1895 io.uio_iov = &iv; 1896 io.uio_iovcnt = 1; 1897 io.uio_offset = (off_t)off; 1898 io.uio_resid = siz; 1899 io.uio_segflg = UIO_SYSSPACE; 1900 io.uio_rw = UIO_READ; 1901 io.uio_td = NULL; 1902 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1903 &cookies); 1904 off = (u_int64_t)io.uio_offset; 1905 if (io.uio_resid) 1906 siz -= io.uio_resid; 1907 1908 if (!cookies && !nd->nd_repstat) 1909 nd->nd_repstat = NFSERR_PERM; 1910 if (nd->nd_flag & ND_NFSV3) { 1911 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 1912 if (!nd->nd_repstat) 1913 nd->nd_repstat = getret; 1914 } 1915 1916 /* 1917 * Handles the failed cases. nd->nd_repstat == 0 past here. 1918 */ 1919 if (nd->nd_repstat) { 1920 vput(vp); 1921 free(rbuf, M_TEMP); 1922 if (cookies) 1923 free(cookies, M_TEMP); 1924 if (nd->nd_flag & ND_NFSV3) 1925 nfsrv_postopattr(nd, getret, &at); 1926 goto out; 1927 } 1928 /* 1929 * If nothing read, return eof 1930 * rpc reply 1931 */ 1932 if (siz == 0) { 1933 vput(vp); 1934 if (nd->nd_flag & ND_NFSV2) { 1935 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1936 } else { 1937 nfsrv_postopattr(nd, getret, &at); 1938 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1939 txdr_hyper(at.na_filerev, tl); 1940 tl += 2; 1941 } 1942 *tl++ = newnfs_false; 1943 *tl = newnfs_true; 1944 free(rbuf, M_TEMP); 1945 free(cookies, M_TEMP); 1946 goto out; 1947 } 1948 1949 /* 1950 * Check for degenerate cases of nothing useful read. 1951 * If so go try again 1952 */ 1953 cpos = rbuf; 1954 cend = rbuf + siz; 1955 dp = (struct dirent *)cpos; 1956 cookiep = cookies; 1957 1958 /* 1959 * For some reason FreeBSD's ufs_readdir() chooses to back the 1960 * directory offset up to a block boundary, so it is necessary to 1961 * skip over the records that precede the requested offset. This 1962 * requires the assumption that file offset cookies monotonically 1963 * increase. 1964 */ 1965 while (cpos < cend && ncookies > 0 && 1966 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1967 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 1968 cpos += dp->d_reclen; 1969 dp = (struct dirent *)cpos; 1970 cookiep++; 1971 ncookies--; 1972 } 1973 if (cpos >= cend || ncookies == 0) { 1974 siz = fullsiz; 1975 toff = off; 1976 goto again; 1977 } 1978 vput(vp); 1979 1980 /* 1981 * dirlen is the size of the reply, including all XDR and must 1982 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1983 * if the XDR should be included in "count", but to be safe, we do. 1984 * (Include the two booleans at the end of the reply in dirlen now.) 1985 */ 1986 if (nd->nd_flag & ND_NFSV3) { 1987 nfsrv_postopattr(nd, getret, &at); 1988 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1989 txdr_hyper(at.na_filerev, tl); 1990 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1991 } else { 1992 dirlen = 2 * NFSX_UNSIGNED; 1993 } 1994 1995 /* Loop through the records and build reply */ 1996 while (cpos < cend && ncookies > 0) { 1997 nlen = dp->d_namlen; 1998 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 1999 nlen <= NFS_MAXNAMLEN) { 2000 if (nd->nd_flag & ND_NFSV3) 2001 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2002 else 2003 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2004 if (dirlen > cnt) { 2005 eofflag = 0; 2006 break; 2007 } 2008 2009 /* 2010 * Build the directory record xdr from 2011 * the dirent entry. 2012 */ 2013 if (nd->nd_flag & ND_NFSV3) { 2014 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2015 *tl++ = newnfs_true; 2016 *tl++ = 0; 2017 } else { 2018 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2019 *tl++ = newnfs_true; 2020 } 2021 *tl = txdr_unsigned(dp->d_fileno); 2022 (void) nfsm_strtom(nd, dp->d_name, nlen); 2023 if (nd->nd_flag & ND_NFSV3) { 2024 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2025 *tl++ = 0; 2026 } else 2027 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 2028 *tl = txdr_unsigned(*cookiep); 2029 } 2030 cpos += dp->d_reclen; 2031 dp = (struct dirent *)cpos; 2032 cookiep++; 2033 ncookies--; 2034 } 2035 if (cpos < cend) 2036 eofflag = 0; 2037 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2038 *tl++ = newnfs_false; 2039 if (eofflag) 2040 *tl = newnfs_true; 2041 else 2042 *tl = newnfs_false; 2043 free(rbuf, M_TEMP); 2044 free(cookies, M_TEMP); 2045 2046 out: 2047 NFSEXITCODE2(0, nd); 2048 return (0); 2049 nfsmout: 2050 vput(vp); 2051 NFSEXITCODE2(error, nd); 2052 return (error); 2053 } 2054 2055 /* 2056 * Readdirplus for V3 and Readdir for V4. 2057 */ 2058 int 2059 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 2060 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 2061 { 2062 struct dirent *dp; 2063 u_int32_t *tl; 2064 int dirlen; 2065 char *cpos, *cend, *rbuf; 2066 struct vnode *nvp; 2067 fhandle_t nfh; 2068 struct nfsvattr nva, at, *nvap = &nva; 2069 struct mbuf *mb0, *mb1; 2070 struct nfsreferral *refp; 2071 int nlen, r, error = 0, getret = 1, usevget = 1; 2072 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 2073 caddr_t bpos0, bpos1; 2074 u_int64_t off, toff, verf; 2075 u_long *cookies = NULL, *cookiep; 2076 nfsattrbit_t attrbits, rderrbits, savbits; 2077 struct uio io; 2078 struct iovec iv; 2079 struct componentname cn; 2080 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 2081 struct mount *mp, *new_mp; 2082 uint64_t mounted_on_fileno; 2083 2084 if (nd->nd_repstat) { 2085 nfsrv_postopattr(nd, getret, &at); 2086 goto out; 2087 } 2088 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2089 off = fxdr_hyper(tl); 2090 toff = off; 2091 tl += 2; 2092 verf = fxdr_hyper(tl); 2093 tl += 2; 2094 siz = fxdr_unsigned(int, *tl++); 2095 cnt = fxdr_unsigned(int, *tl); 2096 2097 /* 2098 * Use the server's maximum data transfer size as the upper bound 2099 * on reply datalen. 2100 */ 2101 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2102 cnt = NFS_SRVMAXDATA(nd); 2103 2104 /* 2105 * siz is a "hint" of how much directory information (name, fileid, 2106 * cookie) should be in the reply. At least one client "hints" 0, 2107 * so I set it to cnt for that case. I also round it up to the 2108 * next multiple of DIRBLKSIZ. 2109 * Since the size of a Readdirplus directory entry reply will always 2110 * be greater than a directory entry returned by VOP_READDIR(), it 2111 * does not make sense to read more than NFS_SRVMAXDATA() via 2112 * VOP_READDIR(). 2113 */ 2114 if (siz <= 0) 2115 siz = cnt; 2116 else if (siz > NFS_SRVMAXDATA(nd)) 2117 siz = NFS_SRVMAXDATA(nd); 2118 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2119 2120 if (nd->nd_flag & ND_NFSV4) { 2121 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 2122 if (error) 2123 goto nfsmout; 2124 NFSSET_ATTRBIT(&savbits, &attrbits); 2125 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 2126 NFSZERO_ATTRBIT(&rderrbits); 2127 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 2128 } else { 2129 NFSZERO_ATTRBIT(&attrbits); 2130 } 2131 fullsiz = siz; 2132 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2133 #if 0 2134 if (!nd->nd_repstat) { 2135 if (off && verf != at.na_filerev) { 2136 /* 2137 * va_filerev is not sufficient as a cookie verifier, 2138 * since it is not supposed to change when entries are 2139 * removed/added unless that offset cookies returned to 2140 * the client are no longer valid. 2141 */ 2142 if (nd->nd_flag & ND_NFSV4) { 2143 nd->nd_repstat = NFSERR_NOTSAME; 2144 } else { 2145 nd->nd_repstat = NFSERR_BAD_COOKIE; 2146 } 2147 } 2148 } 2149 #endif 2150 if (!nd->nd_repstat && vp->v_type != VDIR) 2151 nd->nd_repstat = NFSERR_NOTDIR; 2152 if (!nd->nd_repstat && cnt == 0) 2153 nd->nd_repstat = NFSERR_TOOSMALL; 2154 if (!nd->nd_repstat) 2155 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2156 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2157 NFSACCCHK_VPISLOCKED, NULL); 2158 if (nd->nd_repstat) { 2159 vput(vp); 2160 if (nd->nd_flag & ND_NFSV3) 2161 nfsrv_postopattr(nd, getret, &at); 2162 goto out; 2163 } 2164 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2165 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 2166 2167 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2168 again: 2169 eofflag = 0; 2170 if (cookies) { 2171 free(cookies, M_TEMP); 2172 cookies = NULL; 2173 } 2174 2175 iv.iov_base = rbuf; 2176 iv.iov_len = siz; 2177 io.uio_iov = &iv; 2178 io.uio_iovcnt = 1; 2179 io.uio_offset = (off_t)off; 2180 io.uio_resid = siz; 2181 io.uio_segflg = UIO_SYSSPACE; 2182 io.uio_rw = UIO_READ; 2183 io.uio_td = NULL; 2184 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2185 &cookies); 2186 off = (u_int64_t)io.uio_offset; 2187 if (io.uio_resid) 2188 siz -= io.uio_resid; 2189 2190 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2191 2192 if (!cookies && !nd->nd_repstat) 2193 nd->nd_repstat = NFSERR_PERM; 2194 if (!nd->nd_repstat) 2195 nd->nd_repstat = getret; 2196 if (nd->nd_repstat) { 2197 vput(vp); 2198 if (cookies) 2199 free(cookies, M_TEMP); 2200 free(rbuf, M_TEMP); 2201 if (nd->nd_flag & ND_NFSV3) 2202 nfsrv_postopattr(nd, getret, &at); 2203 goto out; 2204 } 2205 /* 2206 * If nothing read, return eof 2207 * rpc reply 2208 */ 2209 if (siz == 0) { 2210 vput(vp); 2211 if (nd->nd_flag & ND_NFSV3) 2212 nfsrv_postopattr(nd, getret, &at); 2213 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2214 txdr_hyper(at.na_filerev, tl); 2215 tl += 2; 2216 *tl++ = newnfs_false; 2217 *tl = newnfs_true; 2218 free(cookies, M_TEMP); 2219 free(rbuf, M_TEMP); 2220 goto out; 2221 } 2222 2223 /* 2224 * Check for degenerate cases of nothing useful read. 2225 * If so go try again 2226 */ 2227 cpos = rbuf; 2228 cend = rbuf + siz; 2229 dp = (struct dirent *)cpos; 2230 cookiep = cookies; 2231 2232 /* 2233 * For some reason FreeBSD's ufs_readdir() chooses to back the 2234 * directory offset up to a block boundary, so it is necessary to 2235 * skip over the records that precede the requested offset. This 2236 * requires the assumption that file offset cookies monotonically 2237 * increase. 2238 */ 2239 while (cpos < cend && ncookies > 0 && 2240 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2241 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 2242 ((nd->nd_flag & ND_NFSV4) && 2243 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 2244 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 2245 cpos += dp->d_reclen; 2246 dp = (struct dirent *)cpos; 2247 cookiep++; 2248 ncookies--; 2249 } 2250 if (cpos >= cend || ncookies == 0) { 2251 siz = fullsiz; 2252 toff = off; 2253 goto again; 2254 } 2255 2256 /* 2257 * Busy the file system so that the mount point won't go away 2258 * and, as such, VFS_VGET() can be used safely. 2259 */ 2260 mp = vp->v_mount; 2261 vfs_ref(mp); 2262 NFSVOPUNLOCK(vp, 0); 2263 nd->nd_repstat = vfs_busy(mp, 0); 2264 vfs_rel(mp); 2265 if (nd->nd_repstat != 0) { 2266 vrele(vp); 2267 free(cookies, M_TEMP); 2268 free(rbuf, M_TEMP); 2269 if (nd->nd_flag & ND_NFSV3) 2270 nfsrv_postopattr(nd, getret, &at); 2271 goto out; 2272 } 2273 2274 /* 2275 * Check to see if entries in this directory can be safely acquired 2276 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2277 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2278 * automount of the snapshot directory that is required will 2279 * be done. 2280 * This needs to be done here for NFSv4, since NFSv4 never does 2281 * a VFS_VGET() for "." or "..". 2282 */ 2283 if (is_zfs == 1) { 2284 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2285 if (r == EOPNOTSUPP) { 2286 usevget = 0; 2287 cn.cn_nameiop = LOOKUP; 2288 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2289 cn.cn_cred = nd->nd_cred; 2290 cn.cn_thread = p; 2291 } else if (r == 0) 2292 vput(nvp); 2293 } 2294 2295 /* 2296 * Save this position, in case there is an error before one entry 2297 * is created. 2298 */ 2299 mb0 = nd->nd_mb; 2300 bpos0 = nd->nd_bpos; 2301 2302 /* 2303 * Fill in the first part of the reply. 2304 * dirlen is the reply length in bytes and cannot exceed cnt. 2305 * (Include the two booleans at the end of the reply in dirlen now, 2306 * so we recognize when we have exceeded cnt.) 2307 */ 2308 if (nd->nd_flag & ND_NFSV3) { 2309 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2310 nfsrv_postopattr(nd, getret, &at); 2311 } else { 2312 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2313 } 2314 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2315 txdr_hyper(at.na_filerev, tl); 2316 2317 /* 2318 * Save this position, in case there is an empty reply needed. 2319 */ 2320 mb1 = nd->nd_mb; 2321 bpos1 = nd->nd_bpos; 2322 2323 /* Loop through the records and build reply */ 2324 entrycnt = 0; 2325 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2326 nlen = dp->d_namlen; 2327 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2328 nlen <= NFS_MAXNAMLEN && 2329 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2330 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2331 || (nlen == 1 && dp->d_name[0] != '.'))) { 2332 /* 2333 * Save the current position in the reply, in case 2334 * this entry exceeds cnt. 2335 */ 2336 mb1 = nd->nd_mb; 2337 bpos1 = nd->nd_bpos; 2338 2339 /* 2340 * For readdir_and_lookup get the vnode using 2341 * the file number. 2342 */ 2343 nvp = NULL; 2344 refp = NULL; 2345 r = 0; 2346 at_root = 0; 2347 needs_unbusy = 0; 2348 new_mp = mp; 2349 mounted_on_fileno = (uint64_t)dp->d_fileno; 2350 if ((nd->nd_flag & ND_NFSV3) || 2351 NFSNONZERO_ATTRBIT(&savbits)) { 2352 if (nd->nd_flag & ND_NFSV4) 2353 refp = nfsv4root_getreferral(NULL, 2354 vp, dp->d_fileno); 2355 if (refp == NULL) { 2356 if (usevget) 2357 r = VFS_VGET(mp, dp->d_fileno, 2358 LK_SHARED, &nvp); 2359 else 2360 r = EOPNOTSUPP; 2361 if (r == EOPNOTSUPP) { 2362 if (usevget) { 2363 usevget = 0; 2364 cn.cn_nameiop = LOOKUP; 2365 cn.cn_lkflags = 2366 LK_SHARED | 2367 LK_RETRY; 2368 cn.cn_cred = 2369 nd->nd_cred; 2370 cn.cn_thread = p; 2371 } 2372 cn.cn_nameptr = dp->d_name; 2373 cn.cn_namelen = nlen; 2374 cn.cn_flags = ISLASTCN | 2375 NOFOLLOW | LOCKLEAF; 2376 if (nlen == 2 && 2377 dp->d_name[0] == '.' && 2378 dp->d_name[1] == '.') 2379 cn.cn_flags |= 2380 ISDOTDOT; 2381 if (NFSVOPLOCK(vp, LK_SHARED) 2382 != 0) { 2383 nd->nd_repstat = EPERM; 2384 break; 2385 } 2386 if ((vp->v_vflag & VV_ROOT) != 0 2387 && (cn.cn_flags & ISDOTDOT) 2388 != 0) { 2389 vref(vp); 2390 nvp = vp; 2391 r = 0; 2392 } else { 2393 r = VOP_LOOKUP(vp, &nvp, 2394 &cn); 2395 if (vp != nvp) 2396 NFSVOPUNLOCK(vp, 2397 0); 2398 } 2399 } 2400 2401 /* 2402 * For NFSv4, check to see if nvp is 2403 * a mount point and get the mount 2404 * point vnode, as required. 2405 */ 2406 if (r == 0 && 2407 nfsrv_enable_crossmntpt != 0 && 2408 (nd->nd_flag & ND_NFSV4) != 0 && 2409 nvp->v_type == VDIR && 2410 nvp->v_mountedhere != NULL) { 2411 new_mp = nvp->v_mountedhere; 2412 r = vfs_busy(new_mp, 0); 2413 vput(nvp); 2414 nvp = NULL; 2415 if (r == 0) { 2416 r = VFS_ROOT(new_mp, 2417 LK_SHARED, &nvp); 2418 needs_unbusy = 1; 2419 if (r == 0) 2420 at_root = 1; 2421 } 2422 } 2423 } 2424 2425 /* 2426 * If we failed to look up the entry, then it 2427 * has become invalid, most likely removed. 2428 */ 2429 if (r != 0) { 2430 if (needs_unbusy) 2431 vfs_unbusy(new_mp); 2432 goto invalid; 2433 } 2434 KASSERT(refp != NULL || nvp != NULL, 2435 ("%s: undetected lookup error", __func__)); 2436 2437 if (refp == NULL && 2438 ((nd->nd_flag & ND_NFSV3) || 2439 NFSNONZERO_ATTRBIT(&attrbits))) { 2440 r = nfsvno_getfh(nvp, &nfh, p); 2441 if (!r) 2442 r = nfsvno_getattr(nvp, nvap, nd, p, 2443 1, &attrbits); 2444 if (r == 0 && is_zfs == 1 && 2445 nfsrv_enable_crossmntpt != 0 && 2446 (nd->nd_flag & ND_NFSV4) != 0 && 2447 nvp->v_type == VDIR && 2448 vp->v_mount != nvp->v_mount) { 2449 /* 2450 * For a ZFS snapshot, there is a 2451 * pseudo mount that does not set 2452 * v_mountedhere, so it needs to 2453 * be detected via a different 2454 * mount structure. 2455 */ 2456 at_root = 1; 2457 if (new_mp == mp) 2458 new_mp = nvp->v_mount; 2459 } 2460 } 2461 2462 /* 2463 * If we failed to get attributes of the entry, 2464 * then just skip it for NFSv3 (the traditional 2465 * behavior in the old NFS server). 2466 * For NFSv4 the behavior is controlled by 2467 * RDATTRERROR: we either ignore the error or 2468 * fail the request. 2469 * Note that RDATTRERROR is never set for NFSv3. 2470 */ 2471 if (r != 0) { 2472 if (!NFSISSET_ATTRBIT(&attrbits, 2473 NFSATTRBIT_RDATTRERROR)) { 2474 vput(nvp); 2475 if (needs_unbusy != 0) 2476 vfs_unbusy(new_mp); 2477 if ((nd->nd_flag & ND_NFSV3)) 2478 goto invalid; 2479 nd->nd_repstat = r; 2480 break; 2481 } 2482 } 2483 } 2484 2485 /* 2486 * Build the directory record xdr 2487 */ 2488 if (nd->nd_flag & ND_NFSV3) { 2489 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2490 *tl++ = newnfs_true; 2491 *tl++ = 0; 2492 *tl = txdr_unsigned(dp->d_fileno); 2493 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2494 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2495 *tl++ = 0; 2496 *tl = txdr_unsigned(*cookiep); 2497 nfsrv_postopattr(nd, 0, nvap); 2498 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2499 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2500 if (nvp != NULL) 2501 vput(nvp); 2502 } else { 2503 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2504 *tl++ = newnfs_true; 2505 *tl++ = 0; 2506 *tl = txdr_unsigned(*cookiep); 2507 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2508 if (nvp != NULL) { 2509 supports_nfsv4acls = 2510 nfs_supportsnfsv4acls(nvp); 2511 NFSVOPUNLOCK(nvp, 0); 2512 } else 2513 supports_nfsv4acls = 0; 2514 if (refp != NULL) { 2515 dirlen += nfsrv_putreferralattr(nd, 2516 &savbits, refp, 0, 2517 &nd->nd_repstat); 2518 if (nd->nd_repstat) { 2519 if (nvp != NULL) 2520 vrele(nvp); 2521 if (needs_unbusy != 0) 2522 vfs_unbusy(new_mp); 2523 break; 2524 } 2525 } else if (r) { 2526 dirlen += nfsvno_fillattr(nd, new_mp, 2527 nvp, nvap, &nfh, r, &rderrbits, 2528 nd->nd_cred, p, isdgram, 0, 2529 supports_nfsv4acls, at_root, 2530 mounted_on_fileno); 2531 } else { 2532 dirlen += nfsvno_fillattr(nd, new_mp, 2533 nvp, nvap, &nfh, r, &attrbits, 2534 nd->nd_cred, p, isdgram, 0, 2535 supports_nfsv4acls, at_root, 2536 mounted_on_fileno); 2537 } 2538 if (nvp != NULL) 2539 vrele(nvp); 2540 dirlen += (3 * NFSX_UNSIGNED); 2541 } 2542 if (needs_unbusy != 0) 2543 vfs_unbusy(new_mp); 2544 if (dirlen <= cnt) 2545 entrycnt++; 2546 } 2547 invalid: 2548 cpos += dp->d_reclen; 2549 dp = (struct dirent *)cpos; 2550 cookiep++; 2551 ncookies--; 2552 } 2553 vrele(vp); 2554 vfs_unbusy(mp); 2555 2556 /* 2557 * If dirlen > cnt, we must strip off the last entry. If that 2558 * results in an empty reply, report NFSERR_TOOSMALL. 2559 */ 2560 if (dirlen > cnt || nd->nd_repstat) { 2561 if (!nd->nd_repstat && entrycnt == 0) 2562 nd->nd_repstat = NFSERR_TOOSMALL; 2563 if (nd->nd_repstat) { 2564 newnfs_trimtrailing(nd, mb0, bpos0); 2565 if (nd->nd_flag & ND_NFSV3) 2566 nfsrv_postopattr(nd, getret, &at); 2567 } else 2568 newnfs_trimtrailing(nd, mb1, bpos1); 2569 eofflag = 0; 2570 } else if (cpos < cend) 2571 eofflag = 0; 2572 if (!nd->nd_repstat) { 2573 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2574 *tl++ = newnfs_false; 2575 if (eofflag) 2576 *tl = newnfs_true; 2577 else 2578 *tl = newnfs_false; 2579 } 2580 free(cookies, M_TEMP); 2581 free(rbuf, M_TEMP); 2582 2583 out: 2584 NFSEXITCODE2(0, nd); 2585 return (0); 2586 nfsmout: 2587 vput(vp); 2588 NFSEXITCODE2(error, nd); 2589 return (error); 2590 } 2591 2592 /* 2593 * Get the settable attributes out of the mbuf list. 2594 * (Return 0 or EBADRPC) 2595 */ 2596 int 2597 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2598 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2599 { 2600 u_int32_t *tl; 2601 struct nfsv2_sattr *sp; 2602 int error = 0, toclient = 0; 2603 2604 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2605 case ND_NFSV2: 2606 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2607 /* 2608 * Some old clients didn't fill in the high order 16bits. 2609 * --> check the low order 2 bytes for 0xffff 2610 */ 2611 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2612 nvap->na_mode = nfstov_mode(sp->sa_mode); 2613 if (sp->sa_uid != newnfs_xdrneg1) 2614 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2615 if (sp->sa_gid != newnfs_xdrneg1) 2616 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2617 if (sp->sa_size != newnfs_xdrneg1) 2618 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2619 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2620 #ifdef notyet 2621 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2622 #else 2623 nvap->na_atime.tv_sec = 2624 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2625 nvap->na_atime.tv_nsec = 0; 2626 #endif 2627 } 2628 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2629 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2630 break; 2631 case ND_NFSV3: 2632 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2633 if (*tl == newnfs_true) { 2634 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2635 nvap->na_mode = nfstov_mode(*tl); 2636 } 2637 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2638 if (*tl == newnfs_true) { 2639 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2640 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2641 } 2642 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2643 if (*tl == newnfs_true) { 2644 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2645 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2646 } 2647 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2648 if (*tl == newnfs_true) { 2649 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2650 nvap->na_size = fxdr_hyper(tl); 2651 } 2652 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2653 switch (fxdr_unsigned(int, *tl)) { 2654 case NFSV3SATTRTIME_TOCLIENT: 2655 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2656 fxdr_nfsv3time(tl, &nvap->na_atime); 2657 toclient = 1; 2658 break; 2659 case NFSV3SATTRTIME_TOSERVER: 2660 vfs_timestamp(&nvap->na_atime); 2661 nvap->na_vaflags |= VA_UTIMES_NULL; 2662 break; 2663 } 2664 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2665 switch (fxdr_unsigned(int, *tl)) { 2666 case NFSV3SATTRTIME_TOCLIENT: 2667 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2668 fxdr_nfsv3time(tl, &nvap->na_mtime); 2669 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2670 break; 2671 case NFSV3SATTRTIME_TOSERVER: 2672 vfs_timestamp(&nvap->na_mtime); 2673 if (!toclient) 2674 nvap->na_vaflags |= VA_UTIMES_NULL; 2675 break; 2676 } 2677 break; 2678 case ND_NFSV4: 2679 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2680 } 2681 nfsmout: 2682 NFSEXITCODE2(error, nd); 2683 return (error); 2684 } 2685 2686 /* 2687 * Handle the setable attributes for V4. 2688 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2689 */ 2690 int 2691 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2692 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2693 { 2694 u_int32_t *tl; 2695 int attrsum = 0; 2696 int i, j; 2697 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2698 int toclient = 0; 2699 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2700 uid_t uid; 2701 gid_t gid; 2702 2703 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2704 if (error) 2705 goto nfsmout; 2706 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2707 attrsize = fxdr_unsigned(int, *tl); 2708 2709 /* 2710 * Loop around getting the setable attributes. If an unsupported 2711 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2712 */ 2713 if (retnotsup) { 2714 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2715 bitpos = NFSATTRBIT_MAX; 2716 } else { 2717 bitpos = 0; 2718 } 2719 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2720 if (attrsum > attrsize) { 2721 error = NFSERR_BADXDR; 2722 goto nfsmout; 2723 } 2724 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2725 switch (bitpos) { 2726 case NFSATTRBIT_SIZE: 2727 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2728 if (vp != NULL && vp->v_type != VREG) { 2729 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2730 NFSERR_INVAL; 2731 goto nfsmout; 2732 } 2733 nvap->na_size = fxdr_hyper(tl); 2734 attrsum += NFSX_HYPER; 2735 break; 2736 case NFSATTRBIT_ACL: 2737 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2738 p); 2739 if (error) 2740 goto nfsmout; 2741 if (aceerr && !nd->nd_repstat) 2742 nd->nd_repstat = aceerr; 2743 attrsum += aclsize; 2744 break; 2745 case NFSATTRBIT_ARCHIVE: 2746 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2747 if (!nd->nd_repstat) 2748 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2749 attrsum += NFSX_UNSIGNED; 2750 break; 2751 case NFSATTRBIT_HIDDEN: 2752 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2753 if (!nd->nd_repstat) 2754 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2755 attrsum += NFSX_UNSIGNED; 2756 break; 2757 case NFSATTRBIT_MIMETYPE: 2758 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2759 i = fxdr_unsigned(int, *tl); 2760 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2761 if (error) 2762 goto nfsmout; 2763 if (!nd->nd_repstat) 2764 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2765 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2766 break; 2767 case NFSATTRBIT_MODE: 2768 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2769 nvap->na_mode = nfstov_mode(*tl); 2770 attrsum += NFSX_UNSIGNED; 2771 break; 2772 case NFSATTRBIT_OWNER: 2773 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2774 j = fxdr_unsigned(int, *tl); 2775 if (j < 0) { 2776 error = NFSERR_BADXDR; 2777 goto nfsmout; 2778 } 2779 if (j > NFSV4_SMALLSTR) 2780 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2781 else 2782 cp = namestr; 2783 error = nfsrv_mtostr(nd, cp, j); 2784 if (error) { 2785 if (j > NFSV4_SMALLSTR) 2786 free(cp, M_NFSSTRING); 2787 goto nfsmout; 2788 } 2789 if (!nd->nd_repstat) { 2790 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2791 p); 2792 if (!nd->nd_repstat) 2793 nvap->na_uid = uid; 2794 } 2795 if (j > NFSV4_SMALLSTR) 2796 free(cp, M_NFSSTRING); 2797 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2798 break; 2799 case NFSATTRBIT_OWNERGROUP: 2800 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2801 j = fxdr_unsigned(int, *tl); 2802 if (j < 0) { 2803 error = NFSERR_BADXDR; 2804 goto nfsmout; 2805 } 2806 if (j > NFSV4_SMALLSTR) 2807 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2808 else 2809 cp = namestr; 2810 error = nfsrv_mtostr(nd, cp, j); 2811 if (error) { 2812 if (j > NFSV4_SMALLSTR) 2813 free(cp, M_NFSSTRING); 2814 goto nfsmout; 2815 } 2816 if (!nd->nd_repstat) { 2817 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2818 p); 2819 if (!nd->nd_repstat) 2820 nvap->na_gid = gid; 2821 } 2822 if (j > NFSV4_SMALLSTR) 2823 free(cp, M_NFSSTRING); 2824 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2825 break; 2826 case NFSATTRBIT_SYSTEM: 2827 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2828 if (!nd->nd_repstat) 2829 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2830 attrsum += NFSX_UNSIGNED; 2831 break; 2832 case NFSATTRBIT_TIMEACCESSSET: 2833 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2834 attrsum += NFSX_UNSIGNED; 2835 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2836 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2837 fxdr_nfsv4time(tl, &nvap->na_atime); 2838 toclient = 1; 2839 attrsum += NFSX_V4TIME; 2840 } else { 2841 vfs_timestamp(&nvap->na_atime); 2842 nvap->na_vaflags |= VA_UTIMES_NULL; 2843 } 2844 break; 2845 case NFSATTRBIT_TIMEBACKUP: 2846 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2847 if (!nd->nd_repstat) 2848 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2849 attrsum += NFSX_V4TIME; 2850 break; 2851 case NFSATTRBIT_TIMECREATE: 2852 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2853 if (!nd->nd_repstat) 2854 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2855 attrsum += NFSX_V4TIME; 2856 break; 2857 case NFSATTRBIT_TIMEMODIFYSET: 2858 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2859 attrsum += NFSX_UNSIGNED; 2860 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2861 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2862 fxdr_nfsv4time(tl, &nvap->na_mtime); 2863 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2864 attrsum += NFSX_V4TIME; 2865 } else { 2866 vfs_timestamp(&nvap->na_mtime); 2867 if (!toclient) 2868 nvap->na_vaflags |= VA_UTIMES_NULL; 2869 } 2870 break; 2871 default: 2872 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2873 /* 2874 * set bitpos so we drop out of the loop. 2875 */ 2876 bitpos = NFSATTRBIT_MAX; 2877 break; 2878 } 2879 } 2880 2881 /* 2882 * some clients pad the attrlist, so we need to skip over the 2883 * padding. 2884 */ 2885 if (attrsum > attrsize) { 2886 error = NFSERR_BADXDR; 2887 } else { 2888 attrsize = NFSM_RNDUP(attrsize); 2889 if (attrsum < attrsize) 2890 error = nfsm_advance(nd, attrsize - attrsum, -1); 2891 } 2892 nfsmout: 2893 NFSEXITCODE2(error, nd); 2894 return (error); 2895 } 2896 2897 /* 2898 * Check/setup export credentials. 2899 */ 2900 int 2901 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2902 struct ucred *credanon) 2903 { 2904 int error = 0; 2905 2906 /* 2907 * Check/setup credentials. 2908 */ 2909 if (nd->nd_flag & ND_GSS) 2910 exp->nes_exflag &= ~MNT_EXPORTANON; 2911 2912 /* 2913 * Check to see if the operation is allowed for this security flavor. 2914 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2915 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2916 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2917 */ 2918 if (nfsvno_testexp(nd, exp) && 2919 nd->nd_procnum != NFSV4OP_SECINFO && 2920 nd->nd_procnum != NFSPROC_FSINFO) { 2921 if (nd->nd_flag & ND_NFSV4) 2922 error = NFSERR_WRONGSEC; 2923 else 2924 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2925 goto out; 2926 } 2927 2928 /* 2929 * Check to see if the file system is exported V4 only. 2930 */ 2931 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2932 error = NFSERR_PROGNOTV4; 2933 goto out; 2934 } 2935 2936 /* 2937 * Now, map the user credentials. 2938 * (Note that ND_AUTHNONE will only be set for an NFSv3 2939 * Fsinfo RPC. If set for anything else, this code might need 2940 * to change.) 2941 */ 2942 if (NFSVNO_EXPORTED(exp)) { 2943 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2944 NFSVNO_EXPORTANON(exp) || 2945 (nd->nd_flag & ND_AUTHNONE) != 0) { 2946 nd->nd_cred->cr_uid = credanon->cr_uid; 2947 nd->nd_cred->cr_gid = credanon->cr_gid; 2948 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2949 credanon->cr_groups); 2950 } else if ((nd->nd_flag & ND_GSS) == 0) { 2951 /* 2952 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2953 * if there is a replacement credential with a group 2954 * list set up by "nfsuserd -manage-gids". 2955 * If there is no replacement, nfsrv_getgrpscred() 2956 * simply returns its argument. 2957 */ 2958 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2959 } 2960 } 2961 2962 out: 2963 NFSEXITCODE2(error, nd); 2964 return (error); 2965 } 2966 2967 /* 2968 * Check exports. 2969 */ 2970 int 2971 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2972 struct ucred **credp) 2973 { 2974 int i, error, *secflavors; 2975 2976 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2977 &exp->nes_numsecflavor, &secflavors); 2978 if (error) { 2979 if (nfs_rootfhset) { 2980 exp->nes_exflag = 0; 2981 exp->nes_numsecflavor = 0; 2982 error = 0; 2983 } 2984 } else { 2985 /* Copy the security flavors. */ 2986 for (i = 0; i < exp->nes_numsecflavor; i++) 2987 exp->nes_secflavors[i] = secflavors[i]; 2988 } 2989 NFSEXITCODE(error); 2990 return (error); 2991 } 2992 2993 /* 2994 * Get a vnode for a file handle and export stuff. 2995 */ 2996 int 2997 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2998 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2999 struct ucred **credp) 3000 { 3001 int i, error, *secflavors; 3002 3003 *credp = NULL; 3004 exp->nes_numsecflavor = 0; 3005 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 3006 if (error != 0) 3007 /* Make sure the server replies ESTALE to the client. */ 3008 error = ESTALE; 3009 if (nam && !error) { 3010 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3011 &exp->nes_numsecflavor, &secflavors); 3012 if (error) { 3013 if (nfs_rootfhset) { 3014 exp->nes_exflag = 0; 3015 exp->nes_numsecflavor = 0; 3016 error = 0; 3017 } else { 3018 vput(*vpp); 3019 } 3020 } else { 3021 /* Copy the security flavors. */ 3022 for (i = 0; i < exp->nes_numsecflavor; i++) 3023 exp->nes_secflavors[i] = secflavors[i]; 3024 } 3025 } 3026 NFSEXITCODE(error); 3027 return (error); 3028 } 3029 3030 /* 3031 * nfsd_fhtovp() - convert a fh to a vnode ptr 3032 * - look up fsid in mount list (if not found ret error) 3033 * - get vp and export rights by calling nfsvno_fhtovp() 3034 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 3035 * for AUTH_SYS 3036 * - if mpp != NULL, return the mount point so that it can 3037 * be used for vn_finished_write() by the caller 3038 */ 3039 void 3040 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 3041 struct vnode **vpp, struct nfsexstuff *exp, 3042 struct mount **mpp, int startwrite, struct thread *p) 3043 { 3044 struct mount *mp; 3045 struct ucred *credanon; 3046 fhandle_t *fhp; 3047 3048 fhp = (fhandle_t *)nfp->nfsrvfh_data; 3049 /* 3050 * Check for the special case of the nfsv4root_fh. 3051 */ 3052 mp = vfs_busyfs(&fhp->fh_fsid); 3053 if (mpp != NULL) 3054 *mpp = mp; 3055 if (mp == NULL) { 3056 *vpp = NULL; 3057 nd->nd_repstat = ESTALE; 3058 goto out; 3059 } 3060 3061 if (startwrite) { 3062 vn_start_write(NULL, mpp, V_WAIT); 3063 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 3064 lktype = LK_EXCLUSIVE; 3065 } 3066 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 3067 &credanon); 3068 vfs_unbusy(mp); 3069 3070 /* 3071 * For NFSv4 without a pseudo root fs, unexported file handles 3072 * can be returned, so that Lookup works everywhere. 3073 */ 3074 if (!nd->nd_repstat && exp->nes_exflag == 0 && 3075 !(nd->nd_flag & ND_NFSV4)) { 3076 vput(*vpp); 3077 nd->nd_repstat = EACCES; 3078 } 3079 3080 /* 3081 * Personally, I've never seen any point in requiring a 3082 * reserved port#, since only in the rare case where the 3083 * clients are all boxes with secure system privileges, 3084 * does it provide any enhanced security, but... some people 3085 * believe it to be useful and keep putting this code back in. 3086 * (There is also some "security checker" out there that 3087 * complains if the nfs server doesn't enforce this.) 3088 * However, note the following: 3089 * RFC3530 (NFSv4) specifies that a reserved port# not be 3090 * required. 3091 * RFC2623 recommends that, if a reserved port# is checked for, 3092 * that there be a way to turn that off--> ifdef'd. 3093 */ 3094 #ifdef NFS_REQRSVPORT 3095 if (!nd->nd_repstat) { 3096 struct sockaddr_in *saddr; 3097 struct sockaddr_in6 *saddr6; 3098 3099 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3100 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 3101 if (!(nd->nd_flag & ND_NFSV4) && 3102 ((saddr->sin_family == AF_INET && 3103 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 3104 (saddr6->sin6_family == AF_INET6 && 3105 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 3106 vput(*vpp); 3107 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3108 } 3109 } 3110 #endif /* NFS_REQRSVPORT */ 3111 3112 /* 3113 * Check/setup credentials. 3114 */ 3115 if (!nd->nd_repstat) { 3116 nd->nd_saveduid = nd->nd_cred->cr_uid; 3117 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 3118 if (nd->nd_repstat) 3119 vput(*vpp); 3120 } 3121 if (credanon != NULL) 3122 crfree(credanon); 3123 if (nd->nd_repstat) { 3124 if (startwrite) 3125 vn_finished_write(mp); 3126 *vpp = NULL; 3127 if (mpp != NULL) 3128 *mpp = NULL; 3129 } 3130 3131 out: 3132 NFSEXITCODE2(0, nd); 3133 } 3134 3135 /* 3136 * glue for fp. 3137 */ 3138 static int 3139 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 3140 { 3141 struct filedesc *fdp; 3142 struct file *fp; 3143 int error = 0; 3144 3145 fdp = p->td_proc->p_fd; 3146 if (fd < 0 || fd >= fdp->fd_nfiles || 3147 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 3148 error = EBADF; 3149 goto out; 3150 } 3151 *fpp = fp; 3152 3153 out: 3154 NFSEXITCODE(error); 3155 return (error); 3156 } 3157 3158 /* 3159 * Called from nfssvc() to update the exports list. Just call 3160 * vfs_export(). This has to be done, since the v4 root fake fs isn't 3161 * in the mount list. 3162 */ 3163 int 3164 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 3165 { 3166 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 3167 int error = 0; 3168 struct nameidata nd; 3169 fhandle_t fh; 3170 3171 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 3172 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 3173 nfs_rootfhset = 0; 3174 else if (error == 0) { 3175 if (nfsexargp->fspec == NULL) { 3176 error = EPERM; 3177 goto out; 3178 } 3179 /* 3180 * If fspec != NULL, this is the v4root path. 3181 */ 3182 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 3183 nfsexargp->fspec, p); 3184 if ((error = namei(&nd)) != 0) 3185 goto out; 3186 error = nfsvno_getfh(nd.ni_vp, &fh, p); 3187 vrele(nd.ni_vp); 3188 if (!error) { 3189 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 3190 NFSBCOPY((caddr_t)&fh, 3191 nfs_rootfh.nfsrvfh_data, 3192 sizeof (fhandle_t)); 3193 nfs_rootfhset = 1; 3194 } 3195 } 3196 3197 out: 3198 NFSEXITCODE(error); 3199 return (error); 3200 } 3201 3202 /* 3203 * This function needs to test to see if the system is near its limit 3204 * for memory allocation via malloc() or mget() and return True iff 3205 * either of these resources are near their limit. 3206 * XXX (For now, this is just a stub.) 3207 */ 3208 int nfsrv_testmalloclimit = 0; 3209 int 3210 nfsrv_mallocmget_limit(void) 3211 { 3212 static int printmesg = 0; 3213 static int testval = 1; 3214 3215 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 3216 if ((printmesg++ % 100) == 0) 3217 printf("nfsd: malloc/mget near limit\n"); 3218 return (1); 3219 } 3220 return (0); 3221 } 3222 3223 /* 3224 * BSD specific initialization of a mount point. 3225 */ 3226 void 3227 nfsd_mntinit(void) 3228 { 3229 static int inited = 0; 3230 3231 if (inited) 3232 return; 3233 inited = 1; 3234 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 3235 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 3236 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 3237 nfsv4root_mnt.mnt_export = NULL; 3238 TAILQ_INIT(&nfsv4root_opt); 3239 TAILQ_INIT(&nfsv4root_newopt); 3240 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 3241 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 3242 nfsv4root_mnt.mnt_nvnodelistsize = 0; 3243 nfsv4root_mnt.mnt_activevnodelistsize = 0; 3244 } 3245 3246 /* 3247 * Get a vnode for a file handle, without checking exports, etc. 3248 */ 3249 struct vnode * 3250 nfsvno_getvp(fhandle_t *fhp) 3251 { 3252 struct mount *mp; 3253 struct vnode *vp; 3254 int error; 3255 3256 mp = vfs_busyfs(&fhp->fh_fsid); 3257 if (mp == NULL) 3258 return (NULL); 3259 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 3260 vfs_unbusy(mp); 3261 if (error) 3262 return (NULL); 3263 return (vp); 3264 } 3265 3266 /* 3267 * Do a local VOP_ADVLOCK(). 3268 */ 3269 int 3270 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3271 u_int64_t end, struct thread *td) 3272 { 3273 int error = 0; 3274 struct flock fl; 3275 u_int64_t tlen; 3276 3277 if (nfsrv_dolocallocks == 0) 3278 goto out; 3279 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3280 3281 fl.l_whence = SEEK_SET; 3282 fl.l_type = ftype; 3283 fl.l_start = (off_t)first; 3284 if (end == NFS64BITSSET) { 3285 fl.l_len = 0; 3286 } else { 3287 tlen = end - first; 3288 fl.l_len = (off_t)tlen; 3289 } 3290 /* 3291 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3292 * values for all calls, so that all locks will be held by the 3293 * nfsd server. (The nfsd server handles conflicts between the 3294 * various clients.) 3295 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3296 * bytes, so it can't be put in l_sysid. 3297 */ 3298 if (nfsv4_sysid == 0) 3299 nfsv4_sysid = nlm_acquire_next_sysid(); 3300 fl.l_pid = (pid_t)0; 3301 fl.l_sysid = (int)nfsv4_sysid; 3302 3303 if (ftype == F_UNLCK) 3304 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3305 (F_POSIX | F_REMOTE)); 3306 else 3307 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3308 (F_POSIX | F_REMOTE)); 3309 3310 out: 3311 NFSEXITCODE(error); 3312 return (error); 3313 } 3314 3315 /* 3316 * Check the nfsv4 root exports. 3317 */ 3318 int 3319 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3320 { 3321 struct ucred *credanon; 3322 int exflags, error = 0, numsecflavor, *secflavors, i; 3323 3324 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3325 &credanon, &numsecflavor, &secflavors); 3326 if (error) { 3327 error = NFSERR_PROGUNAVAIL; 3328 goto out; 3329 } 3330 if (credanon != NULL) 3331 crfree(credanon); 3332 for (i = 0; i < numsecflavor; i++) { 3333 if (secflavors[i] == AUTH_SYS) 3334 nd->nd_flag |= ND_EXAUTHSYS; 3335 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3336 nd->nd_flag |= ND_EXGSS; 3337 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3338 nd->nd_flag |= ND_EXGSSINTEGRITY; 3339 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3340 nd->nd_flag |= ND_EXGSSPRIVACY; 3341 } 3342 3343 out: 3344 NFSEXITCODE(error); 3345 return (error); 3346 } 3347 3348 /* 3349 * Nfs server pseudo system call for the nfsd's 3350 */ 3351 /* 3352 * MPSAFE 3353 */ 3354 static int 3355 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3356 { 3357 struct file *fp; 3358 struct nfsd_addsock_args sockarg; 3359 struct nfsd_nfsd_args nfsdarg; 3360 struct nfsd_nfsd_oargs onfsdarg; 3361 struct nfsd_pnfsd_args pnfsdarg; 3362 struct vnode *vp, *nvp, *curdvp; 3363 struct pnfsdsfile *pf; 3364 struct nfsdevice *ds, *fds; 3365 cap_rights_t rights; 3366 int buflen, error, ret; 3367 char *buf, *cp, *cp2, *cp3; 3368 char fname[PNFS_FILENAME_LEN + 1]; 3369 3370 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3371 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3372 if (error) 3373 goto out; 3374 /* 3375 * Since we don't know what rights might be required, 3376 * pretend that we need them all. It is better to be too 3377 * careful than too reckless. 3378 */ 3379 error = fget(td, sockarg.sock, 3380 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3381 if (error != 0) 3382 goto out; 3383 if (fp->f_type != DTYPE_SOCKET) { 3384 fdrop(fp, td); 3385 error = EPERM; 3386 goto out; 3387 } 3388 error = nfsrvd_addsock(fp); 3389 fdrop(fp, td); 3390 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3391 if (uap->argp == NULL) { 3392 error = EINVAL; 3393 goto out; 3394 } 3395 if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) { 3396 error = copyin(uap->argp, &onfsdarg, sizeof(onfsdarg)); 3397 if (error == 0) { 3398 nfsdarg.principal = onfsdarg.principal; 3399 nfsdarg.minthreads = onfsdarg.minthreads; 3400 nfsdarg.maxthreads = onfsdarg.maxthreads; 3401 nfsdarg.version = 1; 3402 nfsdarg.addr = NULL; 3403 nfsdarg.addrlen = 0; 3404 nfsdarg.dnshost = NULL; 3405 nfsdarg.dnshostlen = 0; 3406 nfsdarg.dspath = NULL; 3407 nfsdarg.dspathlen = 0; 3408 nfsdarg.mdspath = NULL; 3409 nfsdarg.mdspathlen = 0; 3410 nfsdarg.mirrorcnt = 1; 3411 } 3412 } else 3413 error = copyin(uap->argp, &nfsdarg, sizeof(nfsdarg)); 3414 if (error) 3415 goto out; 3416 if (nfsdarg.addrlen > 0 && nfsdarg.addrlen < 10000 && 3417 nfsdarg.dnshostlen > 0 && nfsdarg.dnshostlen < 10000 && 3418 nfsdarg.dspathlen > 0 && nfsdarg.dspathlen < 10000 && 3419 nfsdarg.mdspathlen > 0 && nfsdarg.mdspathlen < 10000 && 3420 nfsdarg.mirrorcnt >= 1 && 3421 nfsdarg.mirrorcnt <= NFSDEV_MAXMIRRORS && 3422 nfsdarg.addr != NULL && nfsdarg.dnshost != NULL && 3423 nfsdarg.dspath != NULL && nfsdarg.mdspath != NULL) { 3424 NFSD_DEBUG(1, "addrlen=%d dspathlen=%d dnslen=%d" 3425 " mdspathlen=%d mirrorcnt=%d\n", nfsdarg.addrlen, 3426 nfsdarg.dspathlen, nfsdarg.dnshostlen, 3427 nfsdarg.mdspathlen, nfsdarg.mirrorcnt); 3428 cp = malloc(nfsdarg.addrlen + 1, M_TEMP, M_WAITOK); 3429 error = copyin(nfsdarg.addr, cp, nfsdarg.addrlen); 3430 if (error != 0) { 3431 free(cp, M_TEMP); 3432 goto out; 3433 } 3434 cp[nfsdarg.addrlen] = '\0'; /* Ensure nul term. */ 3435 nfsdarg.addr = cp; 3436 cp = malloc(nfsdarg.dnshostlen + 1, M_TEMP, M_WAITOK); 3437 error = copyin(nfsdarg.dnshost, cp, nfsdarg.dnshostlen); 3438 if (error != 0) { 3439 free(nfsdarg.addr, M_TEMP); 3440 free(cp, M_TEMP); 3441 goto out; 3442 } 3443 cp[nfsdarg.dnshostlen] = '\0'; /* Ensure nul term. */ 3444 nfsdarg.dnshost = cp; 3445 cp = malloc(nfsdarg.dspathlen + 1, M_TEMP, M_WAITOK); 3446 error = copyin(nfsdarg.dspath, cp, nfsdarg.dspathlen); 3447 if (error != 0) { 3448 free(nfsdarg.addr, M_TEMP); 3449 free(nfsdarg.dnshost, M_TEMP); 3450 free(cp, M_TEMP); 3451 goto out; 3452 } 3453 cp[nfsdarg.dspathlen] = '\0'; /* Ensure nul term. */ 3454 nfsdarg.dspath = cp; 3455 cp = malloc(nfsdarg.mdspathlen + 1, M_TEMP, M_WAITOK); 3456 error = copyin(nfsdarg.mdspath, cp, nfsdarg.mdspathlen); 3457 if (error != 0) { 3458 free(nfsdarg.addr, M_TEMP); 3459 free(nfsdarg.dnshost, M_TEMP); 3460 free(nfsdarg.dspath, M_TEMP); 3461 free(cp, M_TEMP); 3462 goto out; 3463 } 3464 cp[nfsdarg.mdspathlen] = '\0'; /* Ensure nul term. */ 3465 nfsdarg.mdspath = cp; 3466 } else { 3467 nfsdarg.addr = NULL; 3468 nfsdarg.addrlen = 0; 3469 nfsdarg.dnshost = NULL; 3470 nfsdarg.dnshostlen = 0; 3471 nfsdarg.dspath = NULL; 3472 nfsdarg.dspathlen = 0; 3473 nfsdarg.mdspath = NULL; 3474 nfsdarg.mdspathlen = 0; 3475 nfsdarg.mirrorcnt = 1; 3476 } 3477 error = nfsrvd_nfsd(td, &nfsdarg); 3478 free(nfsdarg.addr, M_TEMP); 3479 free(nfsdarg.dnshost, M_TEMP); 3480 free(nfsdarg.dspath, M_TEMP); 3481 free(nfsdarg.mdspath, M_TEMP); 3482 } else if (uap->flag & NFSSVC_PNFSDS) { 3483 error = copyin(uap->argp, &pnfsdarg, sizeof(pnfsdarg)); 3484 if (error == 0 && (pnfsdarg.op == PNFSDOP_DELDSSERVER || 3485 pnfsdarg.op == PNFSDOP_FORCEDELDS)) { 3486 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3487 error = copyinstr(pnfsdarg.dspath, cp, PATH_MAX + 1, 3488 NULL); 3489 if (error == 0) 3490 error = nfsrv_deldsserver(pnfsdarg.op, cp, td); 3491 free(cp, M_TEMP); 3492 } else if (error == 0 && pnfsdarg.op == PNFSDOP_COPYMR) { 3493 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3494 buflen = sizeof(*pf) * NFSDEV_MAXMIRRORS; 3495 buf = malloc(buflen, M_TEMP, M_WAITOK); 3496 error = copyinstr(pnfsdarg.mdspath, cp, PATH_MAX + 1, 3497 NULL); 3498 NFSD_DEBUG(4, "pnfsdcopymr cp mdspath=%d\n", error); 3499 if (error == 0 && pnfsdarg.dspath != NULL) { 3500 cp2 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3501 error = copyinstr(pnfsdarg.dspath, cp2, 3502 PATH_MAX + 1, NULL); 3503 NFSD_DEBUG(4, "pnfsdcopymr cp dspath=%d\n", 3504 error); 3505 } else 3506 cp2 = NULL; 3507 if (error == 0 && pnfsdarg.curdspath != NULL) { 3508 cp3 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3509 error = copyinstr(pnfsdarg.curdspath, cp3, 3510 PATH_MAX + 1, NULL); 3511 NFSD_DEBUG(4, "pnfsdcopymr cp curdspath=%d\n", 3512 error); 3513 } else 3514 cp3 = NULL; 3515 curdvp = NULL; 3516 fds = NULL; 3517 if (error == 0) 3518 error = nfsrv_mdscopymr(cp, cp2, cp3, buf, 3519 &buflen, fname, td, &vp, &nvp, &pf, &ds, 3520 &fds); 3521 NFSD_DEBUG(4, "nfsrv_mdscopymr=%d\n", error); 3522 if (error == 0) { 3523 if (pf->dsf_dir >= nfsrv_dsdirsize) { 3524 printf("copymr: dsdir out of range\n"); 3525 pf->dsf_dir = 0; 3526 } 3527 NFSD_DEBUG(4, "copymr: buflen=%d\n", buflen); 3528 error = nfsrv_copymr(vp, nvp, 3529 ds->nfsdev_dsdir[pf->dsf_dir], ds, pf, 3530 (struct pnfsdsfile *)buf, 3531 buflen / sizeof(*pf), td->td_ucred, td); 3532 vput(vp); 3533 vput(nvp); 3534 if (fds != NULL && error == 0) { 3535 curdvp = fds->nfsdev_dsdir[pf->dsf_dir]; 3536 ret = vn_lock(curdvp, LK_EXCLUSIVE); 3537 if (ret == 0) { 3538 nfsrv_dsremove(curdvp, fname, 3539 td->td_ucred, td); 3540 NFSVOPUNLOCK(curdvp, 0); 3541 } 3542 } 3543 NFSD_DEBUG(4, "nfsrv_copymr=%d\n", error); 3544 } 3545 free(cp, M_TEMP); 3546 free(cp2, M_TEMP); 3547 free(cp3, M_TEMP); 3548 free(buf, M_TEMP); 3549 } 3550 } else { 3551 error = nfssvc_srvcall(td, uap, td->td_ucred); 3552 } 3553 3554 out: 3555 NFSEXITCODE(error); 3556 return (error); 3557 } 3558 3559 static int 3560 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3561 { 3562 struct nfsex_args export; 3563 struct file *fp = NULL; 3564 int stablefd, len; 3565 struct nfsd_clid adminrevoke; 3566 struct nfsd_dumplist dumplist; 3567 struct nfsd_dumpclients *dumpclients; 3568 struct nfsd_dumplocklist dumplocklist; 3569 struct nfsd_dumplocks *dumplocks; 3570 struct nameidata nd; 3571 vnode_t vp; 3572 int error = EINVAL, igotlock; 3573 struct proc *procp; 3574 static int suspend_nfsd = 0; 3575 3576 if (uap->flag & NFSSVC_PUBLICFH) { 3577 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3578 sizeof (fhandle_t)); 3579 error = copyin(uap->argp, 3580 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3581 if (!error) 3582 nfs_pubfhset = 1; 3583 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3584 error = copyin(uap->argp,(caddr_t)&export, 3585 sizeof (struct nfsex_args)); 3586 if (!error) 3587 error = nfsrv_v4rootexport(&export, cred, p); 3588 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3589 nfs_pubfhset = 0; 3590 error = 0; 3591 } else if (uap->flag & NFSSVC_STABLERESTART) { 3592 error = copyin(uap->argp, (caddr_t)&stablefd, 3593 sizeof (int)); 3594 if (!error) 3595 error = fp_getfvp(p, stablefd, &fp, &vp); 3596 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3597 error = EBADF; 3598 if (!error && newnfs_numnfsd != 0) 3599 error = EPERM; 3600 if (!error) { 3601 nfsrv_stablefirst.nsf_fp = fp; 3602 nfsrv_setupstable(p); 3603 } 3604 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3605 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3606 sizeof (struct nfsd_clid)); 3607 if (!error) 3608 error = nfsrv_adminrevoke(&adminrevoke, p); 3609 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3610 error = copyin(uap->argp, (caddr_t)&dumplist, 3611 sizeof (struct nfsd_dumplist)); 3612 if (!error && (dumplist.ndl_size < 1 || 3613 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3614 error = EPERM; 3615 if (!error) { 3616 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3617 dumpclients = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3618 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3619 error = copyout(dumpclients, 3620 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3621 free(dumpclients, M_TEMP); 3622 } 3623 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3624 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3625 sizeof (struct nfsd_dumplocklist)); 3626 if (!error && (dumplocklist.ndllck_size < 1 || 3627 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3628 error = EPERM; 3629 if (!error) 3630 error = nfsrv_lookupfilename(&nd, 3631 dumplocklist.ndllck_fname, p); 3632 if (!error) { 3633 len = sizeof (struct nfsd_dumplocks) * 3634 dumplocklist.ndllck_size; 3635 dumplocks = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3636 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3637 dumplocklist.ndllck_size, p); 3638 vput(nd.ni_vp); 3639 error = copyout(dumplocks, 3640 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3641 free(dumplocks, M_TEMP); 3642 } 3643 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3644 procp = p->td_proc; 3645 PROC_LOCK(procp); 3646 nfsd_master_pid = procp->p_pid; 3647 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3648 nfsd_master_start = procp->p_stats->p_start; 3649 nfsd_master_proc = procp; 3650 PROC_UNLOCK(procp); 3651 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3652 NFSLOCKV4ROOTMUTEX(); 3653 if (suspend_nfsd == 0) { 3654 /* Lock out all nfsd threads */ 3655 do { 3656 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3657 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3658 } while (igotlock == 0 && suspend_nfsd == 0); 3659 suspend_nfsd = 1; 3660 } 3661 NFSUNLOCKV4ROOTMUTEX(); 3662 error = 0; 3663 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3664 NFSLOCKV4ROOTMUTEX(); 3665 if (suspend_nfsd != 0) { 3666 nfsv4_unlock(&nfsd_suspend_lock, 0); 3667 suspend_nfsd = 0; 3668 } 3669 NFSUNLOCKV4ROOTMUTEX(); 3670 error = 0; 3671 } 3672 3673 NFSEXITCODE(error); 3674 return (error); 3675 } 3676 3677 /* 3678 * Check exports. 3679 * Returns 0 if ok, 1 otherwise. 3680 */ 3681 int 3682 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3683 { 3684 int i; 3685 3686 /* 3687 * This seems odd, but allow the case where the security flavor 3688 * list is empty. This happens when NFSv4 is traversing non-exported 3689 * file systems. Exported file systems should always have a non-empty 3690 * security flavor list. 3691 */ 3692 if (exp->nes_numsecflavor == 0) 3693 return (0); 3694 3695 for (i = 0; i < exp->nes_numsecflavor; i++) { 3696 /* 3697 * The tests for privacy and integrity must be first, 3698 * since ND_GSS is set for everything but AUTH_SYS. 3699 */ 3700 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3701 (nd->nd_flag & ND_GSSPRIVACY)) 3702 return (0); 3703 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3704 (nd->nd_flag & ND_GSSINTEGRITY)) 3705 return (0); 3706 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3707 (nd->nd_flag & ND_GSS)) 3708 return (0); 3709 if (exp->nes_secflavors[i] == AUTH_SYS && 3710 (nd->nd_flag & ND_GSS) == 0) 3711 return (0); 3712 } 3713 return (1); 3714 } 3715 3716 /* 3717 * Calculate a hash value for the fid in a file handle. 3718 */ 3719 uint32_t 3720 nfsrv_hashfh(fhandle_t *fhp) 3721 { 3722 uint32_t hashval; 3723 3724 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3725 return (hashval); 3726 } 3727 3728 /* 3729 * Calculate a hash value for the sessionid. 3730 */ 3731 uint32_t 3732 nfsrv_hashsessionid(uint8_t *sessionid) 3733 { 3734 uint32_t hashval; 3735 3736 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3737 return (hashval); 3738 } 3739 3740 /* 3741 * Signal the userland master nfsd to backup the stable restart file. 3742 */ 3743 void 3744 nfsrv_backupstable(void) 3745 { 3746 struct proc *procp; 3747 3748 if (nfsd_master_proc != NULL) { 3749 procp = pfind(nfsd_master_pid); 3750 /* Try to make sure it is the correct process. */ 3751 if (procp == nfsd_master_proc && 3752 procp->p_stats->p_start.tv_sec == 3753 nfsd_master_start.tv_sec && 3754 procp->p_stats->p_start.tv_usec == 3755 nfsd_master_start.tv_usec && 3756 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3757 kern_psignal(procp, SIGUSR2); 3758 else 3759 nfsd_master_proc = NULL; 3760 3761 if (procp != NULL) 3762 PROC_UNLOCK(procp); 3763 } 3764 } 3765 3766 /* 3767 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 3768 * The arguments are in a structure, so that they can be passed through 3769 * taskqueue for a kernel process to execute this function. 3770 */ 3771 struct nfsrvdscreate { 3772 int done; 3773 int inprog; 3774 struct task tsk; 3775 struct ucred *tcred; 3776 struct vnode *dvp; 3777 NFSPROC_T *p; 3778 struct pnfsdsfile *pf; 3779 int err; 3780 fhandle_t fh; 3781 struct vattr va; 3782 struct vattr createva; 3783 }; 3784 3785 int 3786 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 3787 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 3788 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 3789 { 3790 struct vnode *nvp; 3791 struct nameidata named; 3792 struct vattr va; 3793 char *bufp; 3794 u_long *hashp; 3795 struct nfsnode *np; 3796 struct nfsmount *nmp; 3797 int error; 3798 3799 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 3800 LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE); 3801 nfsvno_setpathbuf(&named, &bufp, &hashp); 3802 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 3803 named.ni_cnd.cn_thread = p; 3804 named.ni_cnd.cn_nameptr = bufp; 3805 if (fnamep != NULL) { 3806 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 3807 named.ni_cnd.cn_namelen = strlen(bufp); 3808 } else 3809 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 3810 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 3811 3812 /* Create the date file in the DS mount. */ 3813 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 3814 if (error == 0) { 3815 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 3816 NFSVOPUNLOCK(dvp, 0); 3817 if (error == 0) { 3818 /* Set the ownership of the file. */ 3819 error = VOP_SETATTR(nvp, nvap, tcred); 3820 NFSD_DEBUG(4, "nfsrv_dscreate:" 3821 " setattr-uid=%d\n", error); 3822 if (error != 0) 3823 vput(nvp); 3824 } 3825 if (error != 0) 3826 printf("pNFS: pnfscreate failed=%d\n", error); 3827 } else 3828 printf("pNFS: pnfscreate vnlock=%d\n", error); 3829 if (error == 0) { 3830 np = VTONFS(nvp); 3831 nmp = VFSTONFS(nvp->v_mount); 3832 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 3833 != 0 || nmp->nm_nam->sa_len > sizeof( 3834 struct sockaddr_in6) || 3835 np->n_fhp->nfh_len != NFSX_MYFH) { 3836 printf("Bad DS file: fstype=%s salen=%d" 3837 " fhlen=%d\n", 3838 nvp->v_mount->mnt_vfc->vfc_name, 3839 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 3840 error = ENOENT; 3841 } 3842 3843 /* Set extattrs for the DS on the MDS file. */ 3844 if (error == 0) { 3845 if (dsa != NULL) { 3846 error = VOP_GETATTR(nvp, &va, tcred); 3847 if (error == 0) { 3848 dsa->dsa_filerev = va.va_filerev; 3849 dsa->dsa_size = va.va_size; 3850 dsa->dsa_atime = va.va_atime; 3851 dsa->dsa_mtime = va.va_mtime; 3852 } 3853 } 3854 if (error == 0) { 3855 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 3856 NFSX_MYFH); 3857 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 3858 nmp->nm_nam->sa_len); 3859 NFSBCOPY(named.ni_cnd.cn_nameptr, 3860 pf->dsf_filename, 3861 sizeof(pf->dsf_filename)); 3862 } 3863 } else 3864 printf("pNFS: pnfscreate can't get DS" 3865 " attr=%d\n", error); 3866 if (nvpp != NULL && error == 0) 3867 *nvpp = nvp; 3868 else 3869 vput(nvp); 3870 } 3871 nfsvno_relpathbuf(&named); 3872 return (error); 3873 } 3874 3875 /* 3876 * Start up the thread that will execute nfsrv_dscreate(). 3877 */ 3878 static void 3879 start_dscreate(void *arg, int pending) 3880 { 3881 struct nfsrvdscreate *dsc; 3882 3883 dsc = (struct nfsrvdscreate *)arg; 3884 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 3885 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 3886 dsc->done = 1; 3887 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 3888 } 3889 3890 /* 3891 * Create a pNFS data file on the Data Server(s). 3892 */ 3893 static void 3894 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 3895 NFSPROC_T *p) 3896 { 3897 struct nfsrvdscreate *dsc, *tdsc; 3898 struct nfsdevice *ds, *tds, *fds; 3899 struct mount *mp; 3900 struct pnfsdsfile *pf, *tpf; 3901 struct pnfsdsattr dsattr; 3902 struct vattr va; 3903 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 3904 struct nfsmount *nmp; 3905 fhandle_t fh; 3906 uid_t vauid; 3907 gid_t vagid; 3908 u_short vamode; 3909 struct ucred *tcred; 3910 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 3911 int failpos, timo; 3912 3913 /* Get a DS server directory in a round-robin order. */ 3914 mirrorcnt = 1; 3915 mp = vp->v_mount; 3916 ds = fds = NULL; 3917 NFSDDSLOCK(); 3918 /* 3919 * Search for the first entry that handles this MDS fs, but use the 3920 * first entry for all MDS fs's otherwise. 3921 */ 3922 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 3923 if (tds->nfsdev_nmp != NULL) { 3924 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 3925 ds = tds; 3926 else if (tds->nfsdev_mdsisset != 0 && 3927 mp->mnt_stat.f_fsid.val[0] == 3928 tds->nfsdev_mdsfsid.val[0] && 3929 mp->mnt_stat.f_fsid.val[1] == 3930 tds->nfsdev_mdsfsid.val[1]) { 3931 ds = fds = tds; 3932 break; 3933 } 3934 } 3935 } 3936 if (ds == NULL) { 3937 NFSDDSUNLOCK(); 3938 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 3939 return; 3940 } 3941 i = dsdir[0] = ds->nfsdev_nextdir; 3942 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 3943 dvp[0] = ds->nfsdev_dsdir[i]; 3944 tds = TAILQ_NEXT(ds, nfsdev_list); 3945 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 3946 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 3947 if (tds->nfsdev_nmp != NULL && 3948 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 3949 (tds->nfsdev_mdsisset != 0 && fds != NULL && 3950 mp->mnt_stat.f_fsid.val[0] == 3951 tds->nfsdev_mdsfsid.val[0] && 3952 mp->mnt_stat.f_fsid.val[1] == 3953 tds->nfsdev_mdsfsid.val[1]))) { 3954 dsdir[mirrorcnt] = i; 3955 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 3956 mirrorcnt++; 3957 if (mirrorcnt >= nfsrv_maxpnfsmirror) 3958 break; 3959 } 3960 } 3961 } 3962 /* Put at end of list to implement round-robin usage. */ 3963 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 3964 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 3965 NFSDDSUNLOCK(); 3966 dsc = NULL; 3967 if (mirrorcnt > 1) 3968 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 3969 M_WAITOK | M_ZERO); 3970 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 3971 M_ZERO); 3972 3973 error = nfsvno_getfh(vp, &fh, p); 3974 if (error == 0) 3975 error = VOP_GETATTR(vp, &va, cred); 3976 if (error == 0) { 3977 /* Set the attributes for "vp" to Setattr the DS vp. */ 3978 vauid = va.va_uid; 3979 vagid = va.va_gid; 3980 vamode = va.va_mode; 3981 VATTR_NULL(&va); 3982 va.va_uid = vauid; 3983 va.va_gid = vagid; 3984 va.va_mode = vamode; 3985 va.va_size = 0; 3986 } else 3987 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 3988 3989 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 3990 cred->cr_gid); 3991 /* Make data file name based on FH. */ 3992 tcred = newnfs_getcred(); 3993 3994 /* 3995 * Create the file on each DS mirror, using kernel process(es) for the 3996 * additional mirrors. 3997 */ 3998 failpos = -1; 3999 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 4000 tpf->dsf_dir = dsdir[i]; 4001 tdsc->tcred = tcred; 4002 tdsc->p = p; 4003 tdsc->pf = tpf; 4004 tdsc->createva = *vap; 4005 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 4006 tdsc->va = va; 4007 tdsc->dvp = dvp[i]; 4008 tdsc->done = 0; 4009 tdsc->inprog = 0; 4010 tdsc->err = 0; 4011 ret = EIO; 4012 if (nfs_pnfsiothreads != 0) { 4013 ret = nfs_pnfsio(start_dscreate, tdsc); 4014 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 4015 } 4016 if (ret != 0) { 4017 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 4018 NULL, tcred, p, NULL); 4019 if (ret != 0) { 4020 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 4021 error)); 4022 if (failpos == -1 && nfsds_failerr(ret)) 4023 failpos = i; 4024 else 4025 error = ret; 4026 } 4027 } 4028 } 4029 if (error == 0) { 4030 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4031 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4032 &dsattr, NULL, tcred, p, NULL); 4033 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4034 failpos = mirrorcnt - 1; 4035 error = 0; 4036 } 4037 } 4038 timo = hz / 50; /* Wait for 20msec. */ 4039 if (timo < 1) 4040 timo = 1; 4041 /* Wait for kernel task(s) to complete. */ 4042 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4043 while (tdsc->inprog != 0 && tdsc->done == 0) 4044 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4045 if (tdsc->err != 0) { 4046 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4047 failpos = i; 4048 else if (error == 0) 4049 error = tdsc->err; 4050 } 4051 } 4052 4053 /* 4054 * If failpos has been set, that mirror has failed, so it needs 4055 * to be disabled. 4056 */ 4057 if (failpos >= 0) { 4058 nmp = VFSTONFS(dvp[failpos]->v_mount); 4059 NFSLOCKMNT(nmp); 4060 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4061 NFSMNTP_CANCELRPCS)) == 0) { 4062 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4063 NFSUNLOCKMNT(nmp); 4064 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4065 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4066 ds); 4067 if (ds != NULL) 4068 nfsrv_killrpcs(nmp); 4069 NFSLOCKMNT(nmp); 4070 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4071 wakeup(nmp); 4072 } 4073 NFSUNLOCKMNT(nmp); 4074 } 4075 4076 NFSFREECRED(tcred); 4077 if (error == 0) { 4078 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4079 4080 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4081 mirrorcnt, nfsrv_maxpnfsmirror); 4082 /* 4083 * For all mirrors that couldn't be created, fill in the 4084 * *pf structure, but with an IP address == 0.0.0.0. 4085 */ 4086 tpf = pf + mirrorcnt; 4087 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4088 *tpf = *pf; 4089 tpf->dsf_sin.sin_family = AF_INET; 4090 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4091 tpf->dsf_sin.sin_addr.s_addr = 0; 4092 tpf->dsf_sin.sin_port = 0; 4093 } 4094 4095 error = vn_extattr_set(vp, IO_NODELOCKED, 4096 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4097 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4098 if (error == 0) 4099 error = vn_extattr_set(vp, IO_NODELOCKED, 4100 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4101 sizeof(dsattr), (char *)&dsattr, p); 4102 if (error != 0) 4103 printf("pNFS: pnfscreate setextattr=%d\n", 4104 error); 4105 } else 4106 printf("pNFS: pnfscreate=%d\n", error); 4107 free(pf, M_TEMP); 4108 free(dsc, M_TEMP); 4109 } 4110 4111 /* 4112 * Get the information needed to remove the pNFS Data Server file from the 4113 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4114 * DS directory vnode. The caller must unlock *ddvp when done with it. 4115 */ 4116 static void 4117 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4118 int *mirrorcntp, char *fname, fhandle_t *fhp) 4119 { 4120 struct vattr va; 4121 struct ucred *tcred; 4122 char *buf; 4123 int buflen, error; 4124 4125 dvpp[0] = NULL; 4126 /* If not an exported regular file or not a pNFS server, just return. */ 4127 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4128 nfsrv_devidcnt == 0) 4129 return; 4130 4131 /* Check to see if this is the last hard link. */ 4132 tcred = newnfs_getcred(); 4133 error = VOP_GETATTR(vp, &va, tcred); 4134 NFSFREECRED(tcred); 4135 if (error != 0) { 4136 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4137 return; 4138 } 4139 if (va.va_nlink > 1) 4140 return; 4141 4142 error = nfsvno_getfh(vp, fhp, p); 4143 if (error != 0) { 4144 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4145 return; 4146 } 4147 4148 buflen = 1024; 4149 buf = malloc(buflen, M_TEMP, M_WAITOK); 4150 /* Get the directory vnode for the DS mount and the file handle. */ 4151 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4152 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4153 free(buf, M_TEMP); 4154 if (error != 0) 4155 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4156 } 4157 4158 /* 4159 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4160 * The arguments are in a structure, so that they can be passed through 4161 * taskqueue for a kernel process to execute this function. 4162 */ 4163 struct nfsrvdsremove { 4164 int done; 4165 int inprog; 4166 struct task tsk; 4167 struct ucred *tcred; 4168 struct vnode *dvp; 4169 NFSPROC_T *p; 4170 int err; 4171 char fname[PNFS_FILENAME_LEN + 1]; 4172 }; 4173 4174 static int 4175 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4176 NFSPROC_T *p) 4177 { 4178 struct nameidata named; 4179 struct vnode *nvp; 4180 char *bufp; 4181 u_long *hashp; 4182 int error; 4183 4184 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4185 if (error != 0) 4186 return (error); 4187 named.ni_cnd.cn_nameiop = DELETE; 4188 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4189 named.ni_cnd.cn_cred = tcred; 4190 named.ni_cnd.cn_thread = p; 4191 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 4192 nfsvno_setpathbuf(&named, &bufp, &hashp); 4193 named.ni_cnd.cn_nameptr = bufp; 4194 named.ni_cnd.cn_namelen = strlen(fname); 4195 strlcpy(bufp, fname, NAME_MAX); 4196 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4197 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4198 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4199 if (error == 0) { 4200 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4201 vput(nvp); 4202 } 4203 NFSVOPUNLOCK(dvp, 0); 4204 nfsvno_relpathbuf(&named); 4205 if (error != 0) 4206 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4207 return (error); 4208 } 4209 4210 /* 4211 * Start up the thread that will execute nfsrv_dsremove(). 4212 */ 4213 static void 4214 start_dsremove(void *arg, int pending) 4215 { 4216 struct nfsrvdsremove *dsrm; 4217 4218 dsrm = (struct nfsrvdsremove *)arg; 4219 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4220 dsrm->p); 4221 dsrm->done = 1; 4222 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4223 } 4224 4225 /* 4226 * Remove a pNFS data file from a Data Server. 4227 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4228 * removed to set up the dvp and fill in the FH. 4229 */ 4230 static void 4231 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4232 NFSPROC_T *p) 4233 { 4234 struct ucred *tcred; 4235 struct nfsrvdsremove *dsrm, *tdsrm; 4236 struct nfsdevice *ds; 4237 struct nfsmount *nmp; 4238 int failpos, i, ret, timo; 4239 4240 tcred = newnfs_getcred(); 4241 dsrm = NULL; 4242 if (mirrorcnt > 1) 4243 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4244 /* 4245 * Remove the file on each DS mirror, using kernel process(es) for the 4246 * additional mirrors. 4247 */ 4248 failpos = -1; 4249 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4250 tdsrm->tcred = tcred; 4251 tdsrm->p = p; 4252 tdsrm->dvp = dvp[i]; 4253 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4254 tdsrm->inprog = 0; 4255 tdsrm->done = 0; 4256 tdsrm->err = 0; 4257 ret = EIO; 4258 if (nfs_pnfsiothreads != 0) { 4259 ret = nfs_pnfsio(start_dsremove, tdsrm); 4260 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4261 } 4262 if (ret != 0) { 4263 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4264 if (failpos == -1 && nfsds_failerr(ret)) 4265 failpos = i; 4266 } 4267 } 4268 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4269 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4270 failpos = mirrorcnt - 1; 4271 timo = hz / 50; /* Wait for 20msec. */ 4272 if (timo < 1) 4273 timo = 1; 4274 /* Wait for kernel task(s) to complete. */ 4275 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4276 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4277 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4278 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4279 failpos = i; 4280 } 4281 4282 /* 4283 * If failpos has been set, that mirror has failed, so it needs 4284 * to be disabled. 4285 */ 4286 if (failpos >= 0) { 4287 nmp = VFSTONFS(dvp[failpos]->v_mount); 4288 NFSLOCKMNT(nmp); 4289 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4290 NFSMNTP_CANCELRPCS)) == 0) { 4291 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4292 NFSUNLOCKMNT(nmp); 4293 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4294 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4295 ds); 4296 if (ds != NULL) 4297 nfsrv_killrpcs(nmp); 4298 NFSLOCKMNT(nmp); 4299 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4300 wakeup(nmp); 4301 } 4302 NFSUNLOCKMNT(nmp); 4303 } 4304 4305 /* Get rid all layouts for the file. */ 4306 nfsrv_freefilelayouts(fhp); 4307 4308 NFSFREECRED(tcred); 4309 free(dsrm, M_TEMP); 4310 } 4311 4312 /* 4313 * Generate a file name based on the file handle and put it in *bufp. 4314 * Return the number of bytes generated. 4315 */ 4316 static int 4317 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4318 { 4319 int i; 4320 uint8_t *cp; 4321 const uint8_t *hexdigits = "0123456789abcdef"; 4322 4323 cp = (uint8_t *)fhp; 4324 for (i = 0; i < sizeof(*fhp); i++) { 4325 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4326 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4327 } 4328 bufp[2 * i] = '\0'; 4329 return (2 * i); 4330 } 4331 4332 /* 4333 * Update the Metadata file's attributes from the DS file when a Read/Write 4334 * layout is returned. 4335 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4336 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4337 */ 4338 int 4339 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4340 { 4341 struct ucred *tcred; 4342 int error; 4343 4344 /* Do this as root so that it won't fail with EACCES. */ 4345 tcred = newnfs_getcred(); 4346 error = nfsrv_proxyds(NULL, vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4347 NULL, NULL, NULL, nap, NULL); 4348 NFSFREECRED(tcred); 4349 return (error); 4350 } 4351 4352 /* 4353 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4354 */ 4355 static int 4356 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4357 NFSPROC_T *p) 4358 { 4359 int error; 4360 4361 error = nfsrv_proxyds(NULL, vp, 0, 0, cred, p, NFSPROC_SETACL, 4362 NULL, NULL, NULL, NULL, aclp); 4363 return (error); 4364 } 4365 4366 static int 4367 nfsrv_proxyds(struct nfsrv_descript *nd, struct vnode *vp, off_t off, int cnt, 4368 struct ucred *cred, struct thread *p, int ioproc, struct mbuf **mpp, 4369 char *cp, struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp) 4370 { 4371 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4372 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4373 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4374 struct nfsdevice *ds; 4375 struct pnfsdsattr dsattr; 4376 char *buf; 4377 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4378 4379 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4380 /* 4381 * If not a regular file, not exported or not a pNFS server, 4382 * just return ENOENT. 4383 */ 4384 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4385 nfsrv_devidcnt == 0) 4386 return (ENOENT); 4387 4388 buflen = 1024; 4389 buf = malloc(buflen, M_TEMP, M_WAITOK); 4390 error = 0; 4391 4392 /* 4393 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4394 * from the MetaData file's extended attribute. 4395 */ 4396 if (ioproc == NFSPROC_GETATTR) { 4397 error = vn_extattr_get(vp, IO_NODELOCKED, 4398 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4399 p); 4400 if (error == 0 && buflen != sizeof(dsattr)) 4401 error = ENXIO; 4402 if (error == 0) { 4403 NFSBCOPY(buf, &dsattr, buflen); 4404 nap->na_filerev = dsattr.dsa_filerev; 4405 nap->na_size = dsattr.dsa_size; 4406 nap->na_atime = dsattr.dsa_atime; 4407 nap->na_mtime = dsattr.dsa_mtime; 4408 4409 /* 4410 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4411 * returns 0, just return now. nfsrv_checkdsattr() 4412 * returns 0 if there is no Read/Write layout 4413 * plus either an Open/Write_access or Write 4414 * delegation issued to a client for the file. 4415 */ 4416 if (nfsrv_pnfsgetdsattr == 0 || 4417 nfsrv_checkdsattr(nd, vp, p) == 0) { 4418 free(buf, M_TEMP); 4419 return (error); 4420 } 4421 } 4422 4423 /* 4424 * Clear ENOATTR so the code below will attempt to do a 4425 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4426 * the extended attribute. 4427 */ 4428 if (error == ENOATTR) 4429 error = 0; 4430 } 4431 4432 origmircnt = -1; 4433 trycnt = 0; 4434 tryagain: 4435 if (error == 0) { 4436 buflen = 1024; 4437 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4438 LK_EXCLUSIVE) 4439 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4440 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4441 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4442 NULL, NULL); 4443 if (error == 0) { 4444 for (i = 0; i < mirrorcnt; i++) 4445 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4446 } else 4447 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4448 } else 4449 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4450 if (error == 0) { 4451 failpos = -1; 4452 if (origmircnt == -1) 4453 origmircnt = mirrorcnt; 4454 /* 4455 * If failpos is set to a mirror#, then that mirror has 4456 * failed and will be disabled. For Read and Getattr, the 4457 * function only tries one mirror, so if that mirror has 4458 * failed, it will need to be retried. As such, increment 4459 * tryitagain for these cases. 4460 * For Write, Setattr and Setacl, the function tries all 4461 * mirrors and will not return an error for the case where 4462 * one mirror has failed. For these cases, the functioning 4463 * mirror(s) will have been modified, so a retry isn't 4464 * necessary. These functions will set failpos for the 4465 * failed mirror#. 4466 */ 4467 if (ioproc == NFSPROC_READDS) { 4468 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4469 mpp, mpp2); 4470 if (nfsds_failerr(error) && mirrorcnt > 1) { 4471 /* 4472 * Setting failpos will cause the mirror 4473 * to be disabled and then a retry of this 4474 * read is required. 4475 */ 4476 failpos = 0; 4477 error = 0; 4478 trycnt++; 4479 } 4480 } else if (ioproc == NFSPROC_WRITEDS) 4481 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4482 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4483 else if (ioproc == NFSPROC_SETATTR) 4484 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4485 mirrorcnt, nap, &failpos); 4486 else if (ioproc == NFSPROC_SETACL) 4487 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4488 mirrorcnt, aclp, &failpos); 4489 else { 4490 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4491 vp, nmp[mirrorcnt - 1], nap); 4492 if (nfsds_failerr(error) && mirrorcnt > 1) { 4493 /* 4494 * Setting failpos will cause the mirror 4495 * to be disabled and then a retry of this 4496 * getattr is required. 4497 */ 4498 failpos = mirrorcnt - 1; 4499 error = 0; 4500 trycnt++; 4501 } 4502 } 4503 ds = NULL; 4504 if (failpos >= 0) { 4505 failnmp = nmp[failpos]; 4506 NFSLOCKMNT(failnmp); 4507 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4508 NFSMNTP_CANCELRPCS)) == 0) { 4509 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4510 NFSUNLOCKMNT(failnmp); 4511 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4512 failnmp, p); 4513 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4514 failpos, ds); 4515 if (ds != NULL) 4516 nfsrv_killrpcs(failnmp); 4517 NFSLOCKMNT(failnmp); 4518 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4519 wakeup(failnmp); 4520 } 4521 NFSUNLOCKMNT(failnmp); 4522 } 4523 for (i = 0; i < mirrorcnt; i++) 4524 NFSVOPUNLOCK(dvp[i], 0); 4525 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4526 trycnt); 4527 /* Try the Read/Getattr again if a mirror was deleted. */ 4528 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4529 goto tryagain; 4530 } else { 4531 /* Return ENOENT for any Extended Attribute error. */ 4532 error = ENOENT; 4533 } 4534 free(buf, M_TEMP); 4535 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4536 return (error); 4537 } 4538 4539 /* 4540 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4541 * attribute. 4542 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4543 * to be checked. If it points to a NULL nmp, then it returns 4544 * a suitable destination. 4545 * curnmp - If non-NULL, it is the source mount for the copy. 4546 */ 4547 int 4548 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4549 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4550 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4551 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4552 { 4553 struct vnode *dvp, *nvp, **tdvpp; 4554 struct mount *mp; 4555 struct nfsmount *nmp, *newnmp; 4556 struct sockaddr *sad; 4557 struct sockaddr_in *sin; 4558 struct nfsdevice *ds, *tds, *fndds; 4559 struct pnfsdsfile *pf; 4560 uint32_t dsdir; 4561 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4562 4563 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4564 *mirrorcntp = 1; 4565 tdvpp = dvpp; 4566 if (nvpp != NULL) 4567 *nvpp = NULL; 4568 if (dvpp != NULL) 4569 *dvpp = NULL; 4570 if (ippos != NULL) 4571 *ippos = -1; 4572 if (newnmpp != NULL) 4573 newnmp = *newnmpp; 4574 else 4575 newnmp = NULL; 4576 mp = vp->v_mount; 4577 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4578 "pnfsd.dsfile", buflenp, buf, p); 4579 mirrorcnt = *buflenp / sizeof(*pf); 4580 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4581 *buflenp != sizeof(*pf) * mirrorcnt)) 4582 error = ENOATTR; 4583 4584 pf = (struct pnfsdsfile *)buf; 4585 /* If curnmp != NULL, check for a match in the mirror list. */ 4586 if (curnmp != NULL && error == 0) { 4587 fnd = 0; 4588 for (i = 0; i < mirrorcnt; i++, pf++) { 4589 sad = (struct sockaddr *)&pf->dsf_sin; 4590 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 4591 if (ippos != NULL) 4592 *ippos = i; 4593 fnd = 1; 4594 break; 4595 } 4596 } 4597 if (fnd == 0) 4598 error = ENXIO; 4599 } 4600 4601 gotone = 0; 4602 pf = (struct pnfsdsfile *)buf; 4603 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 4604 error); 4605 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 4606 fhiszero = 0; 4607 sad = (struct sockaddr *)&pf->dsf_sin; 4608 sin = &pf->dsf_sin; 4609 dsdir = pf->dsf_dir; 4610 if (dsdir >= nfsrv_dsdirsize) { 4611 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 4612 error = ENOATTR; 4613 } else if (nvpp != NULL && newnmp != NULL && 4614 nfsaddr2_match(sad, newnmp->nm_nam)) 4615 error = EEXIST; 4616 if (error == 0) { 4617 if (ippos != NULL && curnmp == NULL && 4618 sad->sa_family == AF_INET && 4619 sin->sin_addr.s_addr == 0) 4620 *ippos = i; 4621 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 4622 fhiszero = 1; 4623 /* Use the socket address to find the mount point. */ 4624 fndds = NULL; 4625 NFSDDSLOCK(); 4626 /* Find a match for the IP address. */ 4627 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 4628 if (ds->nfsdev_nmp != NULL) { 4629 dvp = ds->nfsdev_dvp; 4630 nmp = VFSTONFS(dvp->v_mount); 4631 if (nmp != ds->nfsdev_nmp) 4632 printf("different2 nmp %p %p\n", 4633 nmp, ds->nfsdev_nmp); 4634 if (nfsaddr2_match(sad, nmp->nm_nam)) { 4635 fndds = ds; 4636 break; 4637 } 4638 } 4639 } 4640 if (fndds != NULL && newnmpp != NULL && 4641 newnmp == NULL) { 4642 /* Search for a place to make a mirror copy. */ 4643 TAILQ_FOREACH(tds, &nfsrv_devidhead, 4644 nfsdev_list) { 4645 if (tds->nfsdev_nmp != NULL && 4646 fndds != tds && 4647 ((tds->nfsdev_mdsisset == 0 && 4648 fndds->nfsdev_mdsisset == 0) || 4649 (tds->nfsdev_mdsisset != 0 && 4650 fndds->nfsdev_mdsisset != 0 && 4651 tds->nfsdev_mdsfsid.val[0] == 4652 mp->mnt_stat.f_fsid.val[0] && 4653 tds->nfsdev_mdsfsid.val[1] == 4654 mp->mnt_stat.f_fsid.val[1]))) { 4655 *newnmpp = tds->nfsdev_nmp; 4656 break; 4657 } 4658 } 4659 if (tds != NULL) { 4660 /* 4661 * Move this entry to the end of the 4662 * list, so it won't be selected as 4663 * easily the next time. 4664 */ 4665 TAILQ_REMOVE(&nfsrv_devidhead, tds, 4666 nfsdev_list); 4667 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 4668 nfsdev_list); 4669 } 4670 } 4671 NFSDDSUNLOCK(); 4672 if (fndds != NULL) { 4673 dvp = fndds->nfsdev_dsdir[dsdir]; 4674 if (lktype != 0 || fhiszero != 0 || 4675 (nvpp != NULL && *nvpp == NULL)) { 4676 if (fhiszero != 0) 4677 error = vn_lock(dvp, 4678 LK_EXCLUSIVE); 4679 else if (lktype != 0) 4680 error = vn_lock(dvp, lktype); 4681 else 4682 error = vn_lock(dvp, LK_SHARED); 4683 /* 4684 * If the file handle is all 0's, try to 4685 * do a Lookup against the DS to acquire 4686 * it. 4687 * If dvpp == NULL or the Lookup fails, 4688 * unlock dvp after the call. 4689 */ 4690 if (error == 0 && (fhiszero != 0 || 4691 (nvpp != NULL && *nvpp == NULL))) { 4692 error = nfsrv_pnfslookupds(vp, 4693 dvp, pf, &nvp, p); 4694 if (error == 0) { 4695 if (fhiszero != 0) 4696 nfsrv_pnfssetfh( 4697 vp, pf, 4698 devid, 4699 fnamep, 4700 nvp, p); 4701 if (nvpp != NULL && 4702 *nvpp == NULL) { 4703 *nvpp = nvp; 4704 *dsdirp = dsdir; 4705 } else 4706 vput(nvp); 4707 } 4708 if (error != 0 || lktype == 0) 4709 NFSVOPUNLOCK(dvp, 0); 4710 } 4711 } 4712 if (error == 0) { 4713 gotone++; 4714 NFSD_DEBUG(4, "gotone=%d\n", gotone); 4715 if (devid != NULL) { 4716 NFSBCOPY(fndds->nfsdev_deviceid, 4717 devid, NFSX_V4DEVICEID); 4718 devid += NFSX_V4DEVICEID; 4719 } 4720 if (dvpp != NULL) 4721 *tdvpp++ = dvp; 4722 if (fhp != NULL) 4723 NFSBCOPY(&pf->dsf_fh, fhp++, 4724 NFSX_MYFH); 4725 if (fnamep != NULL && gotone == 1) 4726 strlcpy(fnamep, 4727 pf->dsf_filename, 4728 sizeof(pf->dsf_filename)); 4729 } else 4730 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 4731 "err=%d\n", error); 4732 } 4733 } 4734 } 4735 if (error == 0 && gotone == 0) 4736 error = ENOENT; 4737 4738 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 4739 error); 4740 if (error == 0) 4741 *mirrorcntp = gotone; 4742 else { 4743 if (gotone > 0 && dvpp != NULL) { 4744 /* 4745 * If the error didn't occur on the first one and 4746 * dvpp != NULL, the one(s) prior to the failure will 4747 * have locked dvp's that need to be unlocked. 4748 */ 4749 for (i = 0; i < gotone; i++) { 4750 NFSVOPUNLOCK(*dvpp, 0); 4751 *dvpp++ = NULL; 4752 } 4753 } 4754 /* 4755 * If it found the vnode to be copied from before a failure, 4756 * it needs to be vput()'d. 4757 */ 4758 if (nvpp != NULL && *nvpp != NULL) { 4759 vput(*nvpp); 4760 *nvpp = NULL; 4761 } 4762 } 4763 return (error); 4764 } 4765 4766 /* 4767 * Set the extended attribute for the Change attribute. 4768 */ 4769 static int 4770 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4771 { 4772 struct pnfsdsattr dsattr; 4773 int error; 4774 4775 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 4776 dsattr.dsa_filerev = nap->na_filerev; 4777 dsattr.dsa_size = nap->na_size; 4778 dsattr.dsa_atime = nap->na_atime; 4779 dsattr.dsa_mtime = nap->na_mtime; 4780 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4781 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 4782 if (error != 0) 4783 printf("pNFS: setextattr=%d\n", error); 4784 return (error); 4785 } 4786 4787 static int 4788 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 4789 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 4790 { 4791 uint32_t *tl; 4792 struct nfsrv_descript *nd; 4793 nfsv4stateid_t st; 4794 struct mbuf *m, *m2; 4795 int error = 0, retlen, tlen, trimlen; 4796 4797 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 4798 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4799 *mpp = NULL; 4800 /* 4801 * Use a stateid where other is an alternating 01010 pattern and 4802 * seqid is 0xffffffff. This value is not defined as special by 4803 * the RFC and is used by the FreeBSD NFS server to indicate an 4804 * MDS->DS proxy operation. 4805 */ 4806 st.other[0] = 0x55555555; 4807 st.other[1] = 0x55555555; 4808 st.other[2] = 0x55555555; 4809 st.seqid = 0xffffffff; 4810 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 4811 NULL, NULL, 0, 0); 4812 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4813 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 4814 txdr_hyper(off, tl); 4815 *(tl + 2) = txdr_unsigned(len); 4816 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 4817 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 4818 if (error != 0) { 4819 free(nd, M_TEMP); 4820 return (error); 4821 } 4822 if (nd->nd_repstat == 0) { 4823 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4824 NFSM_STRSIZ(retlen, len); 4825 if (retlen > 0) { 4826 /* Trim off the pre-data XDR from the mbuf chain. */ 4827 m = nd->nd_mrep; 4828 while (m != NULL && m != nd->nd_md) { 4829 if (m->m_next == nd->nd_md) { 4830 m->m_next = NULL; 4831 m_freem(nd->nd_mrep); 4832 nd->nd_mrep = m = nd->nd_md; 4833 } else 4834 m = m->m_next; 4835 } 4836 if (m == NULL) { 4837 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4838 error = ENOENT; 4839 goto nfsmout; 4840 } 4841 4842 /* 4843 * Now, adjust first mbuf so that any XDR before the 4844 * read data is skipped over. 4845 */ 4846 trimlen = nd->nd_dpos - mtod(m, char *); 4847 if (trimlen > 0) { 4848 m->m_len -= trimlen; 4849 NFSM_DATAP(m, trimlen); 4850 } 4851 4852 /* 4853 * Truncate the mbuf chain at retlen bytes of data, 4854 * plus XDR padding that brings the length up to a 4855 * multiple of 4. 4856 */ 4857 tlen = NFSM_RNDUP(retlen); 4858 do { 4859 if (m->m_len >= tlen) { 4860 m->m_len = tlen; 4861 tlen = 0; 4862 m2 = m->m_next; 4863 m->m_next = NULL; 4864 m_freem(m2); 4865 break; 4866 } 4867 tlen -= m->m_len; 4868 m = m->m_next; 4869 } while (m != NULL); 4870 if (tlen > 0) { 4871 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4872 error = ENOENT; 4873 goto nfsmout; 4874 } 4875 *mpp = nd->nd_mrep; 4876 *mpendp = m; 4877 nd->nd_mrep = NULL; 4878 } 4879 } else 4880 error = nd->nd_repstat; 4881 nfsmout: 4882 /* If nd->nd_mrep is already NULL, this is a no-op. */ 4883 m_freem(nd->nd_mrep); 4884 free(nd, M_TEMP); 4885 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 4886 return (error); 4887 } 4888 4889 /* 4890 * Do a write RPC on a DS data file, using this structure for the arguments, 4891 * so that this function can be executed by a separate kernel process. 4892 */ 4893 struct nfsrvwritedsdorpc { 4894 int done; 4895 int inprog; 4896 struct task tsk; 4897 fhandle_t fh; 4898 off_t off; 4899 int len; 4900 struct nfsmount *nmp; 4901 struct ucred *cred; 4902 NFSPROC_T *p; 4903 struct mbuf *m; 4904 int err; 4905 }; 4906 4907 static int 4908 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 4909 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 4910 { 4911 uint32_t *tl; 4912 struct nfsrv_descript *nd; 4913 nfsattrbit_t attrbits; 4914 nfsv4stateid_t st; 4915 int commit, error, retlen; 4916 4917 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4918 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 4919 sizeof(fhandle_t), NULL, NULL, 0, 0); 4920 4921 /* 4922 * Use a stateid where other is an alternating 01010 pattern and 4923 * seqid is 0xffffffff. This value is not defined as special by 4924 * the RFC and is used by the FreeBSD NFS server to indicate an 4925 * MDS->DS proxy operation. 4926 */ 4927 st.other[0] = 0x55555555; 4928 st.other[1] = 0x55555555; 4929 st.other[2] = 0x55555555; 4930 st.seqid = 0xffffffff; 4931 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4932 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 4933 txdr_hyper(off, tl); 4934 tl += 2; 4935 /* 4936 * Do all writes FileSync, since the server doesn't hold onto dirty 4937 * buffers. Since clients should be accessing the DS servers directly 4938 * using the pNFS layouts, this just needs to work correctly as a 4939 * fallback. 4940 */ 4941 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 4942 *tl = txdr_unsigned(len); 4943 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 4944 4945 /* Put data in mbuf chain. */ 4946 nd->nd_mb->m_next = m; 4947 4948 /* Set nd_mb and nd_bpos to end of data. */ 4949 while (m->m_next != NULL) 4950 m = m->m_next; 4951 nd->nd_mb = m; 4952 nd->nd_bpos = mtod(m, char *) + m->m_len; 4953 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 4954 4955 /* Do a Getattr for Size, Change and Modify Time. */ 4956 NFSZERO_ATTRBIT(&attrbits); 4957 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 4958 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 4959 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 4960 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 4961 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4962 *tl = txdr_unsigned(NFSV4OP_GETATTR); 4963 (void) nfsrv_putattrbit(nd, &attrbits); 4964 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 4965 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 4966 if (error != 0) { 4967 free(nd, M_TEMP); 4968 return (error); 4969 } 4970 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 4971 /* Get rid of weak cache consistency data for now. */ 4972 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 4973 (ND_NFSV4 | ND_V4WCCATTR)) { 4974 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 4975 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 4976 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 4977 if (error != 0) 4978 goto nfsmout; 4979 /* 4980 * Get rid of Op# and status for next op. 4981 */ 4982 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 4983 if (*++tl != 0) 4984 nd->nd_flag |= ND_NOMOREDATA; 4985 } 4986 if (nd->nd_repstat == 0) { 4987 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 4988 retlen = fxdr_unsigned(int, *tl++); 4989 commit = fxdr_unsigned(int, *tl); 4990 if (commit != NFSWRITE_FILESYNC) 4991 error = NFSERR_IO; 4992 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 4993 retlen, commit, error); 4994 } else 4995 error = nd->nd_repstat; 4996 /* We have no use for the Write Verifier since we use FileSync. */ 4997 4998 /* 4999 * Get the Change, Size, Access Time and Modify Time attributes and set 5000 * on the Metadata file, so its attributes will be what the file's 5001 * would be if it had been written. 5002 */ 5003 if (error == 0) { 5004 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5005 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5006 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5007 } 5008 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 5009 nfsmout: 5010 m_freem(nd->nd_mrep); 5011 free(nd, M_TEMP); 5012 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 5013 return (error); 5014 } 5015 5016 /* 5017 * Start up the thread that will execute nfsrv_writedsdorpc(). 5018 */ 5019 static void 5020 start_writedsdorpc(void *arg, int pending) 5021 { 5022 struct nfsrvwritedsdorpc *drpc; 5023 5024 drpc = (struct nfsrvwritedsdorpc *)arg; 5025 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5026 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5027 drpc->done = 1; 5028 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5029 } 5030 5031 static int 5032 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5033 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5034 struct mbuf **mpp, char *cp, int *failposp) 5035 { 5036 struct nfsrvwritedsdorpc *drpc, *tdrpc; 5037 struct nfsvattr na; 5038 struct mbuf *m; 5039 int error, i, offs, ret, timo; 5040 5041 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5042 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5043 drpc = NULL; 5044 if (mirrorcnt > 1) 5045 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5046 M_WAITOK); 5047 5048 /* Calculate offset in mbuf chain that data starts. */ 5049 offs = cp - mtod(*mpp, char *); 5050 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5051 5052 /* 5053 * Do the write RPC for every DS, using a separate kernel process 5054 * for every DS except the last one. 5055 */ 5056 error = 0; 5057 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5058 tdrpc->done = 0; 5059 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5060 tdrpc->off = off; 5061 tdrpc->len = len; 5062 tdrpc->nmp = *nmpp; 5063 tdrpc->cred = cred; 5064 tdrpc->p = p; 5065 tdrpc->inprog = 0; 5066 tdrpc->err = 0; 5067 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5068 ret = EIO; 5069 if (nfs_pnfsiothreads != 0) { 5070 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5071 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5072 ret); 5073 } 5074 if (ret != 0) { 5075 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5076 tdrpc->m, cred, p); 5077 if (nfsds_failerr(ret) && *failposp == -1) 5078 *failposp = i; 5079 else if (error == 0 && ret != 0) 5080 error = ret; 5081 } 5082 nmpp++; 5083 fhp++; 5084 } 5085 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5086 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5087 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5088 *failposp = mirrorcnt - 1; 5089 else if (error == 0 && ret != 0) 5090 error = ret; 5091 if (error == 0) 5092 error = nfsrv_setextattr(vp, &na, p); 5093 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5094 tdrpc = drpc; 5095 timo = hz / 50; /* Wait for 20msec. */ 5096 if (timo < 1) 5097 timo = 1; 5098 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5099 /* Wait for RPCs on separate threads to complete. */ 5100 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5101 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5102 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5103 *failposp = i; 5104 else if (error == 0 && tdrpc->err != 0) 5105 error = tdrpc->err; 5106 } 5107 free(drpc, M_TEMP); 5108 return (error); 5109 } 5110 5111 static int 5112 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5113 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5114 struct nfsvattr *dsnap) 5115 { 5116 uint32_t *tl; 5117 struct nfsrv_descript *nd; 5118 nfsv4stateid_t st; 5119 nfsattrbit_t attrbits; 5120 int error; 5121 5122 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5123 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5124 /* 5125 * Use a stateid where other is an alternating 01010 pattern and 5126 * seqid is 0xffffffff. This value is not defined as special by 5127 * the RFC and is used by the FreeBSD NFS server to indicate an 5128 * MDS->DS proxy operation. 5129 */ 5130 st.other[0] = 0x55555555; 5131 st.other[1] = 0x55555555; 5132 st.other[2] = 0x55555555; 5133 st.seqid = 0xffffffff; 5134 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5135 NULL, NULL, 0, 0); 5136 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5137 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5138 5139 /* Do a Getattr for Size, Change, Access Time and Modify Time. */ 5140 NFSZERO_ATTRBIT(&attrbits); 5141 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5142 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5143 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5144 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5145 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5146 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5147 (void) nfsrv_putattrbit(nd, &attrbits); 5148 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5149 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5150 if (error != 0) { 5151 free(nd, M_TEMP); 5152 return (error); 5153 } 5154 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5155 nd->nd_repstat); 5156 /* Get rid of weak cache consistency data for now. */ 5157 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5158 (ND_NFSV4 | ND_V4WCCATTR)) { 5159 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5160 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5161 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5162 if (error != 0) 5163 goto nfsmout; 5164 /* 5165 * Get rid of Op# and status for next op. 5166 */ 5167 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5168 if (*++tl != 0) 5169 nd->nd_flag |= ND_NOMOREDATA; 5170 } 5171 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5172 if (error != 0) 5173 goto nfsmout; 5174 if (nd->nd_repstat != 0) 5175 error = nd->nd_repstat; 5176 /* 5177 * Get the Change, Size, Access Time and Modify Time attributes and set 5178 * on the Metadata file, so its attributes will be what the file's 5179 * would be if it had been written. 5180 */ 5181 if (error == 0) { 5182 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5183 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5184 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5185 } 5186 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5187 nfsmout: 5188 m_freem(nd->nd_mrep); 5189 free(nd, M_TEMP); 5190 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5191 return (error); 5192 } 5193 5194 struct nfsrvsetattrdsdorpc { 5195 int done; 5196 int inprog; 5197 struct task tsk; 5198 fhandle_t fh; 5199 struct nfsmount *nmp; 5200 struct vnode *vp; 5201 struct ucred *cred; 5202 NFSPROC_T *p; 5203 struct nfsvattr na; 5204 struct nfsvattr dsna; 5205 int err; 5206 }; 5207 5208 /* 5209 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5210 */ 5211 static void 5212 start_setattrdsdorpc(void *arg, int pending) 5213 { 5214 struct nfsrvsetattrdsdorpc *drpc; 5215 5216 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5217 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5218 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5219 drpc->done = 1; 5220 } 5221 5222 static int 5223 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5224 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5225 struct nfsvattr *nap, int *failposp) 5226 { 5227 struct nfsrvsetattrdsdorpc *drpc, *tdrpc; 5228 struct nfsvattr na; 5229 int error, i, ret, timo; 5230 5231 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5232 drpc = NULL; 5233 if (mirrorcnt > 1) 5234 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5235 M_WAITOK); 5236 5237 /* 5238 * Do the setattr RPC for every DS, using a separate kernel process 5239 * for every DS except the last one. 5240 */ 5241 error = 0; 5242 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5243 tdrpc->done = 0; 5244 tdrpc->inprog = 0; 5245 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5246 tdrpc->nmp = *nmpp; 5247 tdrpc->vp = vp; 5248 tdrpc->cred = cred; 5249 tdrpc->p = p; 5250 tdrpc->na = *nap; 5251 tdrpc->err = 0; 5252 ret = EIO; 5253 if (nfs_pnfsiothreads != 0) { 5254 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 5255 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 5256 ret); 5257 } 5258 if (ret != 0) { 5259 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 5260 &na); 5261 if (nfsds_failerr(ret) && *failposp == -1) 5262 *failposp = i; 5263 else if (error == 0 && ret != 0) 5264 error = ret; 5265 } 5266 nmpp++; 5267 fhp++; 5268 } 5269 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 5270 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5271 *failposp = mirrorcnt - 1; 5272 else if (error == 0 && ret != 0) 5273 error = ret; 5274 if (error == 0) 5275 error = nfsrv_setextattr(vp, &na, p); 5276 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 5277 tdrpc = drpc; 5278 timo = hz / 50; /* Wait for 20msec. */ 5279 if (timo < 1) 5280 timo = 1; 5281 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5282 /* Wait for RPCs on separate threads to complete. */ 5283 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5284 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 5285 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5286 *failposp = i; 5287 else if (error == 0 && tdrpc->err != 0) 5288 error = tdrpc->err; 5289 } 5290 free(drpc, M_TEMP); 5291 return (error); 5292 } 5293 5294 /* 5295 * Do a Setattr of an NFSv4 ACL on the DS file. 5296 */ 5297 static int 5298 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5299 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 5300 { 5301 struct nfsrv_descript *nd; 5302 nfsv4stateid_t st; 5303 nfsattrbit_t attrbits; 5304 int error; 5305 5306 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 5307 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5308 /* 5309 * Use a stateid where other is an alternating 01010 pattern and 5310 * seqid is 0xffffffff. This value is not defined as special by 5311 * the RFC and is used by the FreeBSD NFS server to indicate an 5312 * MDS->DS proxy operation. 5313 */ 5314 st.other[0] = 0x55555555; 5315 st.other[1] = 0x55555555; 5316 st.other[2] = 0x55555555; 5317 st.seqid = 0xffffffff; 5318 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5319 NULL, NULL, 0, 0); 5320 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5321 NFSZERO_ATTRBIT(&attrbits); 5322 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 5323 /* 5324 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 5325 * so passing in the metadata "vp" will be ok, since it is of 5326 * the same type (VREG). 5327 */ 5328 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 5329 NULL, 0, 0, 0, 0, 0, NULL); 5330 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5331 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5332 if (error != 0) { 5333 free(nd, M_TEMP); 5334 return (error); 5335 } 5336 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 5337 nd->nd_repstat); 5338 error = nd->nd_repstat; 5339 m_freem(nd->nd_mrep); 5340 free(nd, M_TEMP); 5341 return (error); 5342 } 5343 5344 struct nfsrvsetacldsdorpc { 5345 int done; 5346 int inprog; 5347 struct task tsk; 5348 fhandle_t fh; 5349 struct nfsmount *nmp; 5350 struct vnode *vp; 5351 struct ucred *cred; 5352 NFSPROC_T *p; 5353 struct acl *aclp; 5354 int err; 5355 }; 5356 5357 /* 5358 * Start up the thread that will execute nfsrv_setacldsdorpc(). 5359 */ 5360 static void 5361 start_setacldsdorpc(void *arg, int pending) 5362 { 5363 struct nfsrvsetacldsdorpc *drpc; 5364 5365 drpc = (struct nfsrvsetacldsdorpc *)arg; 5366 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 5367 drpc->vp, drpc->nmp, drpc->aclp); 5368 drpc->done = 1; 5369 } 5370 5371 static int 5372 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5373 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 5374 int *failposp) 5375 { 5376 struct nfsrvsetacldsdorpc *drpc, *tdrpc; 5377 int error, i, ret, timo; 5378 5379 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 5380 drpc = NULL; 5381 if (mirrorcnt > 1) 5382 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5383 M_WAITOK); 5384 5385 /* 5386 * Do the setattr RPC for every DS, using a separate kernel process 5387 * for every DS except the last one. 5388 */ 5389 error = 0; 5390 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5391 tdrpc->done = 0; 5392 tdrpc->inprog = 0; 5393 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5394 tdrpc->nmp = *nmpp; 5395 tdrpc->vp = vp; 5396 tdrpc->cred = cred; 5397 tdrpc->p = p; 5398 tdrpc->aclp = aclp; 5399 tdrpc->err = 0; 5400 ret = EIO; 5401 if (nfs_pnfsiothreads != 0) { 5402 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 5403 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 5404 ret); 5405 } 5406 if (ret != 0) { 5407 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 5408 aclp); 5409 if (nfsds_failerr(ret) && *failposp == -1) 5410 *failposp = i; 5411 else if (error == 0 && ret != 0) 5412 error = ret; 5413 } 5414 nmpp++; 5415 fhp++; 5416 } 5417 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 5418 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5419 *failposp = mirrorcnt - 1; 5420 else if (error == 0 && ret != 0) 5421 error = ret; 5422 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 5423 tdrpc = drpc; 5424 timo = hz / 50; /* Wait for 20msec. */ 5425 if (timo < 1) 5426 timo = 1; 5427 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5428 /* Wait for RPCs on separate threads to complete. */ 5429 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5430 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 5431 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5432 *failposp = i; 5433 else if (error == 0 && tdrpc->err != 0) 5434 error = tdrpc->err; 5435 } 5436 free(drpc, M_TEMP); 5437 return (error); 5438 } 5439 5440 /* 5441 * Getattr call to the DS for the Modify, Size and Change attributes. 5442 */ 5443 static int 5444 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5445 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 5446 { 5447 struct nfsrv_descript *nd; 5448 int error; 5449 nfsattrbit_t attrbits; 5450 5451 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 5452 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5453 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 5454 sizeof(fhandle_t), NULL, NULL, 0, 0); 5455 NFSZERO_ATTRBIT(&attrbits); 5456 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5457 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5458 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5459 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5460 (void) nfsrv_putattrbit(nd, &attrbits); 5461 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5462 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5463 if (error != 0) { 5464 free(nd, M_TEMP); 5465 return (error); 5466 } 5467 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 5468 nd->nd_repstat); 5469 if (nd->nd_repstat == 0) { 5470 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 5471 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 5472 NULL, NULL); 5473 /* 5474 * We can only save the updated values in the extended 5475 * attribute if the vp is exclusively locked. 5476 * This should happen when any of the following operations 5477 * occur on the vnode: 5478 * Close, Delegreturn, LayoutCommit, LayoutReturn 5479 * As such, the updated extended attribute should get saved 5480 * before nfsrv_checkdsattr() returns 0 and allows the cached 5481 * attributes to be returned without calling this function. 5482 */ 5483 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 5484 error = nfsrv_setextattr(vp, nap, p); 5485 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 5486 error); 5487 } 5488 } else 5489 error = nd->nd_repstat; 5490 m_freem(nd->nd_mrep); 5491 free(nd, M_TEMP); 5492 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 5493 return (error); 5494 } 5495 5496 /* 5497 * Get the device id and file handle for a DS file. 5498 */ 5499 int 5500 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 5501 fhandle_t *fhp, char *devid) 5502 { 5503 int buflen, error; 5504 char *buf; 5505 5506 buflen = 1024; 5507 buf = malloc(buflen, M_TEMP, M_WAITOK); 5508 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 5509 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 5510 free(buf, M_TEMP); 5511 return (error); 5512 } 5513 5514 /* 5515 * Do a Lookup against the DS for the filename. 5516 */ 5517 static int 5518 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 5519 struct vnode **nvpp, NFSPROC_T *p) 5520 { 5521 struct nameidata named; 5522 struct ucred *tcred; 5523 char *bufp; 5524 u_long *hashp; 5525 struct vnode *nvp; 5526 int error; 5527 5528 tcred = newnfs_getcred(); 5529 named.ni_cnd.cn_nameiop = LOOKUP; 5530 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 5531 named.ni_cnd.cn_cred = tcred; 5532 named.ni_cnd.cn_thread = p; 5533 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 5534 nfsvno_setpathbuf(&named, &bufp, &hashp); 5535 named.ni_cnd.cn_nameptr = bufp; 5536 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 5537 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 5538 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 5539 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 5540 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 5541 NFSFREECRED(tcred); 5542 nfsvno_relpathbuf(&named); 5543 if (error == 0) 5544 *nvpp = nvp; 5545 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 5546 return (error); 5547 } 5548 5549 /* 5550 * Set the file handle to the correct one. 5551 */ 5552 static void 5553 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 5554 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 5555 { 5556 struct nfsnode *np; 5557 int ret; 5558 5559 np = VTONFS(nvp); 5560 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 5561 /* 5562 * We can only do a vn_set_extattr() if the vnode is exclusively 5563 * locked and vn_start_write() has been done. If devid != NULL or 5564 * fnamep != NULL or the vnode is shared locked, vn_start_write() 5565 * may not have been done. 5566 * If not done now, it will be done on a future call. 5567 */ 5568 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 5569 LK_EXCLUSIVE) 5570 ret = vn_extattr_set(vp, IO_NODELOCKED, 5571 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 5572 (char *)pf, p); 5573 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 5574 } 5575 5576 /* 5577 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 5578 * when the DS has failed. 5579 */ 5580 void 5581 nfsrv_killrpcs(struct nfsmount *nmp) 5582 { 5583 5584 /* 5585 * Call newnfs_nmcancelreqs() to cause 5586 * any RPCs in progress on the mount point to 5587 * fail. 5588 * This will cause any process waiting for an 5589 * RPC to complete while holding a vnode lock 5590 * on the mounted-on vnode (such as "df" or 5591 * a non-forced "umount") to fail. 5592 * This will unlock the mounted-on vnode so 5593 * a forced dismount can succeed. 5594 * The NFSMNTP_CANCELRPCS flag should be set when this function is 5595 * called. 5596 */ 5597 newnfs_nmcancelreqs(nmp); 5598 } 5599 5600 /* 5601 * Sum up the statfs info for each of the DSs, so that the client will 5602 * receive the total for all DSs. 5603 */ 5604 static int 5605 nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp) 5606 { 5607 struct statfs *tsf; 5608 struct nfsdevice *ds; 5609 struct vnode **dvpp, **tdvpp, *dvp; 5610 uint64_t tot; 5611 int cnt, error = 0, i; 5612 5613 if (nfsrv_devidcnt <= 0) 5614 return (ENXIO); 5615 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 5616 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 5617 5618 /* Get an array of the dvps for the DSs. */ 5619 tdvpp = dvpp; 5620 i = 0; 5621 NFSDDSLOCK(); 5622 /* First, search for matches for same file system. */ 5623 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5624 if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 && 5625 ds->nfsdev_mdsfsid.val[0] == mp->mnt_stat.f_fsid.val[0] && 5626 ds->nfsdev_mdsfsid.val[1] == mp->mnt_stat.f_fsid.val[1]) { 5627 if (++i > nfsrv_devidcnt) 5628 break; 5629 *tdvpp++ = ds->nfsdev_dvp; 5630 } 5631 } 5632 /* 5633 * If no matches for same file system, total all servers not assigned 5634 * to a file system. 5635 */ 5636 if (i == 0) { 5637 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5638 if (ds->nfsdev_nmp != NULL && 5639 ds->nfsdev_mdsisset == 0) { 5640 if (++i > nfsrv_devidcnt) 5641 break; 5642 *tdvpp++ = ds->nfsdev_dvp; 5643 } 5644 } 5645 } 5646 NFSDDSUNLOCK(); 5647 cnt = i; 5648 5649 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 5650 tdvpp = dvpp; 5651 for (i = 0; i < cnt && error == 0; i++) { 5652 dvp = *tdvpp++; 5653 error = VFS_STATFS(dvp->v_mount, tsf); 5654 if (error == 0) { 5655 if (sf->f_bsize == 0) { 5656 if (tsf->f_bsize > 0) 5657 sf->f_bsize = tsf->f_bsize; 5658 else 5659 sf->f_bsize = 8192; 5660 } 5661 if (tsf->f_blocks > 0) { 5662 if (sf->f_bsize != tsf->f_bsize) { 5663 tot = tsf->f_blocks * tsf->f_bsize; 5664 sf->f_blocks += (tot / sf->f_bsize); 5665 } else 5666 sf->f_blocks += tsf->f_blocks; 5667 } 5668 if (tsf->f_bfree > 0) { 5669 if (sf->f_bsize != tsf->f_bsize) { 5670 tot = tsf->f_bfree * tsf->f_bsize; 5671 sf->f_bfree += (tot / sf->f_bsize); 5672 } else 5673 sf->f_bfree += tsf->f_bfree; 5674 } 5675 if (tsf->f_bavail > 0) { 5676 if (sf->f_bsize != tsf->f_bsize) { 5677 tot = tsf->f_bavail * tsf->f_bsize; 5678 sf->f_bavail += (tot / sf->f_bsize); 5679 } else 5680 sf->f_bavail += tsf->f_bavail; 5681 } 5682 } 5683 } 5684 free(tsf, M_TEMP); 5685 free(dvpp, M_TEMP); 5686 return (error); 5687 } 5688 5689 /* 5690 * Set an NFSv4 acl. 5691 */ 5692 int 5693 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 5694 { 5695 int error; 5696 5697 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 5698 error = NFSERR_ATTRNOTSUPP; 5699 goto out; 5700 } 5701 /* 5702 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 5703 * Make sure it has enough room for that - splitting every entry 5704 * into two and appending "canonical six" entries at the end. 5705 * Cribbed out of kern/vfs_acl.c - Rick M. 5706 */ 5707 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 5708 error = NFSERR_ATTRNOTSUPP; 5709 goto out; 5710 } 5711 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 5712 if (error == 0) { 5713 error = nfsrv_dssetacl(vp, aclp, cred, p); 5714 if (error == ENOENT) 5715 error = 0; 5716 } 5717 5718 out: 5719 NFSEXITCODE(error); 5720 return (error); 5721 } 5722 5723 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 5724 5725 /* 5726 * Called once to initialize data structures... 5727 */ 5728 static int 5729 nfsd_modevent(module_t mod, int type, void *data) 5730 { 5731 int error = 0, i; 5732 static int loaded = 0; 5733 5734 switch (type) { 5735 case MOD_LOAD: 5736 if (loaded) 5737 goto out; 5738 newnfs_portinit(); 5739 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 5740 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 5741 MTX_DEF); 5742 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 5743 MTX_DEF); 5744 } 5745 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 5746 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 5747 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 5748 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 5749 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 5750 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 5751 nfsrvd_initcache(); 5752 nfsd_init(); 5753 NFSD_LOCK(); 5754 nfsrvd_init(0); 5755 NFSD_UNLOCK(); 5756 nfsd_mntinit(); 5757 #ifdef VV_DISABLEDELEG 5758 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 5759 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 5760 #endif 5761 nfsd_call_servertimer = nfsrv_servertimer; 5762 nfsd_call_nfsd = nfssvc_nfsd; 5763 loaded = 1; 5764 break; 5765 5766 case MOD_UNLOAD: 5767 if (newnfs_numnfsd != 0) { 5768 error = EBUSY; 5769 break; 5770 } 5771 5772 #ifdef VV_DISABLEDELEG 5773 vn_deleg_ops.vndeleg_recall = NULL; 5774 vn_deleg_ops.vndeleg_disable = NULL; 5775 #endif 5776 nfsd_call_servertimer = NULL; 5777 nfsd_call_nfsd = NULL; 5778 5779 /* Clean out all NFSv4 state. */ 5780 nfsrv_throwawayallstate(curthread); 5781 5782 /* Clean the NFS server reply cache */ 5783 nfsrvd_cleancache(); 5784 5785 /* Free up the krpc server pool. */ 5786 if (nfsrvd_pool != NULL) 5787 svcpool_destroy(nfsrvd_pool); 5788 5789 /* and get rid of the locks */ 5790 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 5791 mtx_destroy(&nfsrchash_table[i].mtx); 5792 mtx_destroy(&nfsrcahash_table[i].mtx); 5793 } 5794 mtx_destroy(&nfsrc_udpmtx); 5795 mtx_destroy(&nfs_v4root_mutex); 5796 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 5797 mtx_destroy(&nfsrv_dontlistlock_mtx); 5798 mtx_destroy(&nfsrv_recalllock_mtx); 5799 for (i = 0; i < nfsrv_sessionhashsize; i++) 5800 mtx_destroy(&nfssessionhash[i].mtx); 5801 if (nfslayouthash != NULL) { 5802 for (i = 0; i < nfsrv_layouthashsize; i++) 5803 mtx_destroy(&nfslayouthash[i].mtx); 5804 free(nfslayouthash, M_NFSDSESSION); 5805 } 5806 lockdestroy(&nfsv4root_mnt.mnt_explock); 5807 free(nfsclienthash, M_NFSDCLIENT); 5808 free(nfslockhash, M_NFSDLOCKFILE); 5809 free(nfssessionhash, M_NFSDSESSION); 5810 loaded = 0; 5811 break; 5812 default: 5813 error = EOPNOTSUPP; 5814 break; 5815 } 5816 5817 out: 5818 NFSEXITCODE(error); 5819 return (error); 5820 } 5821 static moduledata_t nfsd_mod = { 5822 "nfsd", 5823 nfsd_modevent, 5824 NULL, 5825 }; 5826 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 5827 5828 /* So that loader and kldload(2) can find us, wherever we are.. */ 5829 MODULE_VERSION(nfsd, 1); 5830 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 5831 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 5832 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 5833 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 5834 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 5835 5836