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