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 *); 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); 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); 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 if (!r) { 2420 if (refp == NULL && 2421 ((nd->nd_flag & ND_NFSV3) || 2422 NFSNONZERO_ATTRBIT(&attrbits))) { 2423 r = nfsvno_getfh(nvp, &nfh, p); 2424 if (!r) 2425 r = nfsvno_getattr(nvp, nvap, nd, p, 2426 1, &attrbits); 2427 if (r == 0 && is_zfs == 1 && 2428 nfsrv_enable_crossmntpt != 0 && 2429 (nd->nd_flag & ND_NFSV4) != 0 && 2430 nvp->v_type == VDIR && 2431 vp->v_mount != nvp->v_mount) { 2432 /* 2433 * For a ZFS snapshot, there is a 2434 * pseudo mount that does not set 2435 * v_mountedhere, so it needs to 2436 * be detected via a different 2437 * mount structure. 2438 */ 2439 at_root = 1; 2440 if (new_mp == mp) 2441 new_mp = nvp->v_mount; 2442 } 2443 } 2444 } else { 2445 nvp = NULL; 2446 } 2447 if (r) { 2448 if (!NFSISSET_ATTRBIT(&attrbits, 2449 NFSATTRBIT_RDATTRERROR)) { 2450 if (nvp != NULL) 2451 vput(nvp); 2452 if (needs_unbusy != 0) 2453 vfs_unbusy(new_mp); 2454 nd->nd_repstat = r; 2455 break; 2456 } 2457 } 2458 } 2459 2460 /* 2461 * Build the directory record xdr 2462 */ 2463 if (nd->nd_flag & ND_NFSV3) { 2464 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2465 *tl++ = newnfs_true; 2466 *tl++ = 0; 2467 *tl = txdr_unsigned(dp->d_fileno); 2468 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2469 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2470 *tl++ = 0; 2471 *tl = txdr_unsigned(*cookiep); 2472 nfsrv_postopattr(nd, 0, nvap); 2473 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2474 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2475 if (nvp != NULL) 2476 vput(nvp); 2477 } else { 2478 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2479 *tl++ = newnfs_true; 2480 *tl++ = 0; 2481 *tl = txdr_unsigned(*cookiep); 2482 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2483 if (nvp != NULL) { 2484 supports_nfsv4acls = 2485 nfs_supportsnfsv4acls(nvp); 2486 NFSVOPUNLOCK(nvp, 0); 2487 } else 2488 supports_nfsv4acls = 0; 2489 if (refp != NULL) { 2490 dirlen += nfsrv_putreferralattr(nd, 2491 &savbits, refp, 0, 2492 &nd->nd_repstat); 2493 if (nd->nd_repstat) { 2494 if (nvp != NULL) 2495 vrele(nvp); 2496 if (needs_unbusy != 0) 2497 vfs_unbusy(new_mp); 2498 break; 2499 } 2500 } else if (r) { 2501 dirlen += nfsvno_fillattr(nd, new_mp, 2502 nvp, nvap, &nfh, r, &rderrbits, 2503 nd->nd_cred, p, isdgram, 0, 2504 supports_nfsv4acls, at_root, 2505 mounted_on_fileno); 2506 } else { 2507 dirlen += nfsvno_fillattr(nd, new_mp, 2508 nvp, nvap, &nfh, r, &attrbits, 2509 nd->nd_cred, p, isdgram, 0, 2510 supports_nfsv4acls, at_root, 2511 mounted_on_fileno); 2512 } 2513 if (nvp != NULL) 2514 vrele(nvp); 2515 dirlen += (3 * NFSX_UNSIGNED); 2516 } 2517 if (needs_unbusy != 0) 2518 vfs_unbusy(new_mp); 2519 if (dirlen <= cnt) 2520 entrycnt++; 2521 } 2522 cpos += dp->d_reclen; 2523 dp = (struct dirent *)cpos; 2524 cookiep++; 2525 ncookies--; 2526 } 2527 vrele(vp); 2528 vfs_unbusy(mp); 2529 2530 /* 2531 * If dirlen > cnt, we must strip off the last entry. If that 2532 * results in an empty reply, report NFSERR_TOOSMALL. 2533 */ 2534 if (dirlen > cnt || nd->nd_repstat) { 2535 if (!nd->nd_repstat && entrycnt == 0) 2536 nd->nd_repstat = NFSERR_TOOSMALL; 2537 if (nd->nd_repstat) { 2538 newnfs_trimtrailing(nd, mb0, bpos0); 2539 if (nd->nd_flag & ND_NFSV3) 2540 nfsrv_postopattr(nd, getret, &at); 2541 } else 2542 newnfs_trimtrailing(nd, mb1, bpos1); 2543 eofflag = 0; 2544 } else if (cpos < cend) 2545 eofflag = 0; 2546 if (!nd->nd_repstat) { 2547 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2548 *tl++ = newnfs_false; 2549 if (eofflag) 2550 *tl = newnfs_true; 2551 else 2552 *tl = newnfs_false; 2553 } 2554 free(cookies, M_TEMP); 2555 free(rbuf, M_TEMP); 2556 2557 out: 2558 NFSEXITCODE2(0, nd); 2559 return (0); 2560 nfsmout: 2561 vput(vp); 2562 NFSEXITCODE2(error, nd); 2563 return (error); 2564 } 2565 2566 /* 2567 * Get the settable attributes out of the mbuf list. 2568 * (Return 0 or EBADRPC) 2569 */ 2570 int 2571 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2572 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2573 { 2574 u_int32_t *tl; 2575 struct nfsv2_sattr *sp; 2576 int error = 0, toclient = 0; 2577 2578 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2579 case ND_NFSV2: 2580 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2581 /* 2582 * Some old clients didn't fill in the high order 16bits. 2583 * --> check the low order 2 bytes for 0xffff 2584 */ 2585 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2586 nvap->na_mode = nfstov_mode(sp->sa_mode); 2587 if (sp->sa_uid != newnfs_xdrneg1) 2588 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2589 if (sp->sa_gid != newnfs_xdrneg1) 2590 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2591 if (sp->sa_size != newnfs_xdrneg1) 2592 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2593 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2594 #ifdef notyet 2595 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2596 #else 2597 nvap->na_atime.tv_sec = 2598 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2599 nvap->na_atime.tv_nsec = 0; 2600 #endif 2601 } 2602 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2603 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2604 break; 2605 case ND_NFSV3: 2606 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2607 if (*tl == newnfs_true) { 2608 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2609 nvap->na_mode = nfstov_mode(*tl); 2610 } 2611 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2612 if (*tl == newnfs_true) { 2613 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2614 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2615 } 2616 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2617 if (*tl == newnfs_true) { 2618 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2619 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2620 } 2621 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2622 if (*tl == newnfs_true) { 2623 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2624 nvap->na_size = fxdr_hyper(tl); 2625 } 2626 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2627 switch (fxdr_unsigned(int, *tl)) { 2628 case NFSV3SATTRTIME_TOCLIENT: 2629 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2630 fxdr_nfsv3time(tl, &nvap->na_atime); 2631 toclient = 1; 2632 break; 2633 case NFSV3SATTRTIME_TOSERVER: 2634 vfs_timestamp(&nvap->na_atime); 2635 nvap->na_vaflags |= VA_UTIMES_NULL; 2636 break; 2637 } 2638 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2639 switch (fxdr_unsigned(int, *tl)) { 2640 case NFSV3SATTRTIME_TOCLIENT: 2641 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2642 fxdr_nfsv3time(tl, &nvap->na_mtime); 2643 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2644 break; 2645 case NFSV3SATTRTIME_TOSERVER: 2646 vfs_timestamp(&nvap->na_mtime); 2647 if (!toclient) 2648 nvap->na_vaflags |= VA_UTIMES_NULL; 2649 break; 2650 } 2651 break; 2652 case ND_NFSV4: 2653 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2654 } 2655 nfsmout: 2656 NFSEXITCODE2(error, nd); 2657 return (error); 2658 } 2659 2660 /* 2661 * Handle the setable attributes for V4. 2662 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2663 */ 2664 int 2665 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2666 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2667 { 2668 u_int32_t *tl; 2669 int attrsum = 0; 2670 int i, j; 2671 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2672 int toclient = 0; 2673 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2674 uid_t uid; 2675 gid_t gid; 2676 2677 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2678 if (error) 2679 goto nfsmout; 2680 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2681 attrsize = fxdr_unsigned(int, *tl); 2682 2683 /* 2684 * Loop around getting the setable attributes. If an unsupported 2685 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2686 */ 2687 if (retnotsup) { 2688 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2689 bitpos = NFSATTRBIT_MAX; 2690 } else { 2691 bitpos = 0; 2692 } 2693 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2694 if (attrsum > attrsize) { 2695 error = NFSERR_BADXDR; 2696 goto nfsmout; 2697 } 2698 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2699 switch (bitpos) { 2700 case NFSATTRBIT_SIZE: 2701 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2702 if (vp != NULL && vp->v_type != VREG) { 2703 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2704 NFSERR_INVAL; 2705 goto nfsmout; 2706 } 2707 nvap->na_size = fxdr_hyper(tl); 2708 attrsum += NFSX_HYPER; 2709 break; 2710 case NFSATTRBIT_ACL: 2711 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2712 p); 2713 if (error) 2714 goto nfsmout; 2715 if (aceerr && !nd->nd_repstat) 2716 nd->nd_repstat = aceerr; 2717 attrsum += aclsize; 2718 break; 2719 case NFSATTRBIT_ARCHIVE: 2720 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2721 if (!nd->nd_repstat) 2722 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2723 attrsum += NFSX_UNSIGNED; 2724 break; 2725 case NFSATTRBIT_HIDDEN: 2726 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2727 if (!nd->nd_repstat) 2728 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2729 attrsum += NFSX_UNSIGNED; 2730 break; 2731 case NFSATTRBIT_MIMETYPE: 2732 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2733 i = fxdr_unsigned(int, *tl); 2734 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2735 if (error) 2736 goto nfsmout; 2737 if (!nd->nd_repstat) 2738 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2739 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2740 break; 2741 case NFSATTRBIT_MODE: 2742 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2743 nvap->na_mode = nfstov_mode(*tl); 2744 attrsum += NFSX_UNSIGNED; 2745 break; 2746 case NFSATTRBIT_OWNER: 2747 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2748 j = fxdr_unsigned(int, *tl); 2749 if (j < 0) { 2750 error = NFSERR_BADXDR; 2751 goto nfsmout; 2752 } 2753 if (j > NFSV4_SMALLSTR) 2754 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2755 else 2756 cp = namestr; 2757 error = nfsrv_mtostr(nd, cp, j); 2758 if (error) { 2759 if (j > NFSV4_SMALLSTR) 2760 free(cp, M_NFSSTRING); 2761 goto nfsmout; 2762 } 2763 if (!nd->nd_repstat) { 2764 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid, 2765 p); 2766 if (!nd->nd_repstat) 2767 nvap->na_uid = uid; 2768 } 2769 if (j > NFSV4_SMALLSTR) 2770 free(cp, M_NFSSTRING); 2771 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2772 break; 2773 case NFSATTRBIT_OWNERGROUP: 2774 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2775 j = fxdr_unsigned(int, *tl); 2776 if (j < 0) { 2777 error = NFSERR_BADXDR; 2778 goto nfsmout; 2779 } 2780 if (j > NFSV4_SMALLSTR) 2781 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2782 else 2783 cp = namestr; 2784 error = nfsrv_mtostr(nd, cp, j); 2785 if (error) { 2786 if (j > NFSV4_SMALLSTR) 2787 free(cp, M_NFSSTRING); 2788 goto nfsmout; 2789 } 2790 if (!nd->nd_repstat) { 2791 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2792 p); 2793 if (!nd->nd_repstat) 2794 nvap->na_gid = gid; 2795 } 2796 if (j > NFSV4_SMALLSTR) 2797 free(cp, M_NFSSTRING); 2798 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2799 break; 2800 case NFSATTRBIT_SYSTEM: 2801 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2802 if (!nd->nd_repstat) 2803 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2804 attrsum += NFSX_UNSIGNED; 2805 break; 2806 case NFSATTRBIT_TIMEACCESSSET: 2807 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2808 attrsum += NFSX_UNSIGNED; 2809 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2810 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2811 fxdr_nfsv4time(tl, &nvap->na_atime); 2812 toclient = 1; 2813 attrsum += NFSX_V4TIME; 2814 } else { 2815 vfs_timestamp(&nvap->na_atime); 2816 nvap->na_vaflags |= VA_UTIMES_NULL; 2817 } 2818 break; 2819 case NFSATTRBIT_TIMEBACKUP: 2820 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2821 if (!nd->nd_repstat) 2822 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2823 attrsum += NFSX_V4TIME; 2824 break; 2825 case NFSATTRBIT_TIMECREATE: 2826 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2827 if (!nd->nd_repstat) 2828 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2829 attrsum += NFSX_V4TIME; 2830 break; 2831 case NFSATTRBIT_TIMEMODIFYSET: 2832 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2833 attrsum += NFSX_UNSIGNED; 2834 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2835 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2836 fxdr_nfsv4time(tl, &nvap->na_mtime); 2837 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2838 attrsum += NFSX_V4TIME; 2839 } else { 2840 vfs_timestamp(&nvap->na_mtime); 2841 if (!toclient) 2842 nvap->na_vaflags |= VA_UTIMES_NULL; 2843 } 2844 break; 2845 default: 2846 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2847 /* 2848 * set bitpos so we drop out of the loop. 2849 */ 2850 bitpos = NFSATTRBIT_MAX; 2851 break; 2852 } 2853 } 2854 2855 /* 2856 * some clients pad the attrlist, so we need to skip over the 2857 * padding. 2858 */ 2859 if (attrsum > attrsize) { 2860 error = NFSERR_BADXDR; 2861 } else { 2862 attrsize = NFSM_RNDUP(attrsize); 2863 if (attrsum < attrsize) 2864 error = nfsm_advance(nd, attrsize - attrsum, -1); 2865 } 2866 nfsmout: 2867 NFSEXITCODE2(error, nd); 2868 return (error); 2869 } 2870 2871 /* 2872 * Check/setup export credentials. 2873 */ 2874 int 2875 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2876 struct ucred *credanon) 2877 { 2878 int error = 0; 2879 2880 /* 2881 * Check/setup credentials. 2882 */ 2883 if (nd->nd_flag & ND_GSS) 2884 exp->nes_exflag &= ~MNT_EXPORTANON; 2885 2886 /* 2887 * Check to see if the operation is allowed for this security flavor. 2888 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2889 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2890 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2891 */ 2892 if (nfsvno_testexp(nd, exp) && 2893 nd->nd_procnum != NFSV4OP_SECINFO && 2894 nd->nd_procnum != NFSPROC_FSINFO) { 2895 if (nd->nd_flag & ND_NFSV4) 2896 error = NFSERR_WRONGSEC; 2897 else 2898 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2899 goto out; 2900 } 2901 2902 /* 2903 * Check to see if the file system is exported V4 only. 2904 */ 2905 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2906 error = NFSERR_PROGNOTV4; 2907 goto out; 2908 } 2909 2910 /* 2911 * Now, map the user credentials. 2912 * (Note that ND_AUTHNONE will only be set for an NFSv3 2913 * Fsinfo RPC. If set for anything else, this code might need 2914 * to change.) 2915 */ 2916 if (NFSVNO_EXPORTED(exp)) { 2917 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2918 NFSVNO_EXPORTANON(exp) || 2919 (nd->nd_flag & ND_AUTHNONE) != 0) { 2920 nd->nd_cred->cr_uid = credanon->cr_uid; 2921 nd->nd_cred->cr_gid = credanon->cr_gid; 2922 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2923 credanon->cr_groups); 2924 } else if ((nd->nd_flag & ND_GSS) == 0) { 2925 /* 2926 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2927 * if there is a replacement credential with a group 2928 * list set up by "nfsuserd -manage-gids". 2929 * If there is no replacement, nfsrv_getgrpscred() 2930 * simply returns its argument. 2931 */ 2932 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2933 } 2934 } 2935 2936 out: 2937 NFSEXITCODE2(error, nd); 2938 return (error); 2939 } 2940 2941 /* 2942 * Check exports. 2943 */ 2944 int 2945 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2946 struct ucred **credp) 2947 { 2948 int i, error, *secflavors; 2949 2950 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2951 &exp->nes_numsecflavor, &secflavors); 2952 if (error) { 2953 if (nfs_rootfhset) { 2954 exp->nes_exflag = 0; 2955 exp->nes_numsecflavor = 0; 2956 error = 0; 2957 } 2958 } else { 2959 /* Copy the security flavors. */ 2960 for (i = 0; i < exp->nes_numsecflavor; i++) 2961 exp->nes_secflavors[i] = secflavors[i]; 2962 } 2963 NFSEXITCODE(error); 2964 return (error); 2965 } 2966 2967 /* 2968 * Get a vnode for a file handle and export stuff. 2969 */ 2970 int 2971 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2972 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 2973 struct ucred **credp) 2974 { 2975 int i, error, *secflavors; 2976 2977 *credp = NULL; 2978 exp->nes_numsecflavor = 0; 2979 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 2980 if (error != 0) 2981 /* Make sure the server replies ESTALE to the client. */ 2982 error = ESTALE; 2983 if (nam && !error) { 2984 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2985 &exp->nes_numsecflavor, &secflavors); 2986 if (error) { 2987 if (nfs_rootfhset) { 2988 exp->nes_exflag = 0; 2989 exp->nes_numsecflavor = 0; 2990 error = 0; 2991 } else { 2992 vput(*vpp); 2993 } 2994 } else { 2995 /* Copy the security flavors. */ 2996 for (i = 0; i < exp->nes_numsecflavor; i++) 2997 exp->nes_secflavors[i] = secflavors[i]; 2998 } 2999 } 3000 NFSEXITCODE(error); 3001 return (error); 3002 } 3003 3004 /* 3005 * nfsd_fhtovp() - convert a fh to a vnode ptr 3006 * - look up fsid in mount list (if not found ret error) 3007 * - get vp and export rights by calling nfsvno_fhtovp() 3008 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 3009 * for AUTH_SYS 3010 * - if mpp != NULL, return the mount point so that it can 3011 * be used for vn_finished_write() by the caller 3012 */ 3013 void 3014 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 3015 struct vnode **vpp, struct nfsexstuff *exp, 3016 struct mount **mpp, int startwrite, struct thread *p) 3017 { 3018 struct mount *mp; 3019 struct ucred *credanon; 3020 fhandle_t *fhp; 3021 3022 fhp = (fhandle_t *)nfp->nfsrvfh_data; 3023 /* 3024 * Check for the special case of the nfsv4root_fh. 3025 */ 3026 mp = vfs_busyfs(&fhp->fh_fsid); 3027 if (mpp != NULL) 3028 *mpp = mp; 3029 if (mp == NULL) { 3030 *vpp = NULL; 3031 nd->nd_repstat = ESTALE; 3032 goto out; 3033 } 3034 3035 if (startwrite) { 3036 vn_start_write(NULL, mpp, V_WAIT); 3037 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 3038 lktype = LK_EXCLUSIVE; 3039 } 3040 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 3041 &credanon); 3042 vfs_unbusy(mp); 3043 3044 /* 3045 * For NFSv4 without a pseudo root fs, unexported file handles 3046 * can be returned, so that Lookup works everywhere. 3047 */ 3048 if (!nd->nd_repstat && exp->nes_exflag == 0 && 3049 !(nd->nd_flag & ND_NFSV4)) { 3050 vput(*vpp); 3051 nd->nd_repstat = EACCES; 3052 } 3053 3054 /* 3055 * Personally, I've never seen any point in requiring a 3056 * reserved port#, since only in the rare case where the 3057 * clients are all boxes with secure system privileges, 3058 * does it provide any enhanced security, but... some people 3059 * believe it to be useful and keep putting this code back in. 3060 * (There is also some "security checker" out there that 3061 * complains if the nfs server doesn't enforce this.) 3062 * However, note the following: 3063 * RFC3530 (NFSv4) specifies that a reserved port# not be 3064 * required. 3065 * RFC2623 recommends that, if a reserved port# is checked for, 3066 * that there be a way to turn that off--> ifdef'd. 3067 */ 3068 #ifdef NFS_REQRSVPORT 3069 if (!nd->nd_repstat) { 3070 struct sockaddr_in *saddr; 3071 struct sockaddr_in6 *saddr6; 3072 3073 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3074 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 3075 if (!(nd->nd_flag & ND_NFSV4) && 3076 ((saddr->sin_family == AF_INET && 3077 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 3078 (saddr6->sin6_family == AF_INET6 && 3079 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 3080 vput(*vpp); 3081 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3082 } 3083 } 3084 #endif /* NFS_REQRSVPORT */ 3085 3086 /* 3087 * Check/setup credentials. 3088 */ 3089 if (!nd->nd_repstat) { 3090 nd->nd_saveduid = nd->nd_cred->cr_uid; 3091 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 3092 if (nd->nd_repstat) 3093 vput(*vpp); 3094 } 3095 if (credanon != NULL) 3096 crfree(credanon); 3097 if (nd->nd_repstat) { 3098 if (startwrite) 3099 vn_finished_write(mp); 3100 *vpp = NULL; 3101 if (mpp != NULL) 3102 *mpp = NULL; 3103 } 3104 3105 out: 3106 NFSEXITCODE2(0, nd); 3107 } 3108 3109 /* 3110 * glue for fp. 3111 */ 3112 static int 3113 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 3114 { 3115 struct filedesc *fdp; 3116 struct file *fp; 3117 int error = 0; 3118 3119 fdp = p->td_proc->p_fd; 3120 if (fd < 0 || fd >= fdp->fd_nfiles || 3121 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 3122 error = EBADF; 3123 goto out; 3124 } 3125 *fpp = fp; 3126 3127 out: 3128 NFSEXITCODE(error); 3129 return (error); 3130 } 3131 3132 /* 3133 * Called from nfssvc() to update the exports list. Just call 3134 * vfs_export(). This has to be done, since the v4 root fake fs isn't 3135 * in the mount list. 3136 */ 3137 int 3138 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 3139 { 3140 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 3141 int error = 0; 3142 struct nameidata nd; 3143 fhandle_t fh; 3144 3145 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 3146 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 3147 nfs_rootfhset = 0; 3148 else if (error == 0) { 3149 if (nfsexargp->fspec == NULL) { 3150 error = EPERM; 3151 goto out; 3152 } 3153 /* 3154 * If fspec != NULL, this is the v4root path. 3155 */ 3156 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 3157 nfsexargp->fspec, p); 3158 if ((error = namei(&nd)) != 0) 3159 goto out; 3160 error = nfsvno_getfh(nd.ni_vp, &fh, p); 3161 vrele(nd.ni_vp); 3162 if (!error) { 3163 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 3164 NFSBCOPY((caddr_t)&fh, 3165 nfs_rootfh.nfsrvfh_data, 3166 sizeof (fhandle_t)); 3167 nfs_rootfhset = 1; 3168 } 3169 } 3170 3171 out: 3172 NFSEXITCODE(error); 3173 return (error); 3174 } 3175 3176 /* 3177 * This function needs to test to see if the system is near its limit 3178 * for memory allocation via malloc() or mget() and return True iff 3179 * either of these resources are near their limit. 3180 * XXX (For now, this is just a stub.) 3181 */ 3182 int nfsrv_testmalloclimit = 0; 3183 int 3184 nfsrv_mallocmget_limit(void) 3185 { 3186 static int printmesg = 0; 3187 static int testval = 1; 3188 3189 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 3190 if ((printmesg++ % 100) == 0) 3191 printf("nfsd: malloc/mget near limit\n"); 3192 return (1); 3193 } 3194 return (0); 3195 } 3196 3197 /* 3198 * BSD specific initialization of a mount point. 3199 */ 3200 void 3201 nfsd_mntinit(void) 3202 { 3203 static int inited = 0; 3204 3205 if (inited) 3206 return; 3207 inited = 1; 3208 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 3209 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 3210 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 3211 nfsv4root_mnt.mnt_export = NULL; 3212 TAILQ_INIT(&nfsv4root_opt); 3213 TAILQ_INIT(&nfsv4root_newopt); 3214 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 3215 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 3216 nfsv4root_mnt.mnt_nvnodelistsize = 0; 3217 nfsv4root_mnt.mnt_activevnodelistsize = 0; 3218 } 3219 3220 /* 3221 * Get a vnode for a file handle, without checking exports, etc. 3222 */ 3223 struct vnode * 3224 nfsvno_getvp(fhandle_t *fhp) 3225 { 3226 struct mount *mp; 3227 struct vnode *vp; 3228 int error; 3229 3230 mp = vfs_busyfs(&fhp->fh_fsid); 3231 if (mp == NULL) 3232 return (NULL); 3233 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 3234 vfs_unbusy(mp); 3235 if (error) 3236 return (NULL); 3237 return (vp); 3238 } 3239 3240 /* 3241 * Do a local VOP_ADVLOCK(). 3242 */ 3243 int 3244 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3245 u_int64_t end, struct thread *td) 3246 { 3247 int error = 0; 3248 struct flock fl; 3249 u_int64_t tlen; 3250 3251 if (nfsrv_dolocallocks == 0) 3252 goto out; 3253 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3254 3255 fl.l_whence = SEEK_SET; 3256 fl.l_type = ftype; 3257 fl.l_start = (off_t)first; 3258 if (end == NFS64BITSSET) { 3259 fl.l_len = 0; 3260 } else { 3261 tlen = end - first; 3262 fl.l_len = (off_t)tlen; 3263 } 3264 /* 3265 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3266 * values for all calls, so that all locks will be held by the 3267 * nfsd server. (The nfsd server handles conflicts between the 3268 * various clients.) 3269 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3270 * bytes, so it can't be put in l_sysid. 3271 */ 3272 if (nfsv4_sysid == 0) 3273 nfsv4_sysid = nlm_acquire_next_sysid(); 3274 fl.l_pid = (pid_t)0; 3275 fl.l_sysid = (int)nfsv4_sysid; 3276 3277 if (ftype == F_UNLCK) 3278 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3279 (F_POSIX | F_REMOTE)); 3280 else 3281 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3282 (F_POSIX | F_REMOTE)); 3283 3284 out: 3285 NFSEXITCODE(error); 3286 return (error); 3287 } 3288 3289 /* 3290 * Check the nfsv4 root exports. 3291 */ 3292 int 3293 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3294 { 3295 struct ucred *credanon; 3296 int exflags, error = 0, numsecflavor, *secflavors, i; 3297 3298 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3299 &credanon, &numsecflavor, &secflavors); 3300 if (error) { 3301 error = NFSERR_PROGUNAVAIL; 3302 goto out; 3303 } 3304 if (credanon != NULL) 3305 crfree(credanon); 3306 for (i = 0; i < numsecflavor; i++) { 3307 if (secflavors[i] == AUTH_SYS) 3308 nd->nd_flag |= ND_EXAUTHSYS; 3309 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3310 nd->nd_flag |= ND_EXGSS; 3311 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3312 nd->nd_flag |= ND_EXGSSINTEGRITY; 3313 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3314 nd->nd_flag |= ND_EXGSSPRIVACY; 3315 } 3316 3317 out: 3318 NFSEXITCODE(error); 3319 return (error); 3320 } 3321 3322 /* 3323 * Nfs server pseudo system call for the nfsd's 3324 */ 3325 /* 3326 * MPSAFE 3327 */ 3328 static int 3329 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3330 { 3331 struct file *fp; 3332 struct nfsd_addsock_args sockarg; 3333 struct nfsd_nfsd_args nfsdarg; 3334 struct nfsd_nfsd_oargs onfsdarg; 3335 struct nfsd_pnfsd_args pnfsdarg; 3336 struct vnode *vp, *nvp, *curdvp; 3337 struct pnfsdsfile *pf; 3338 struct nfsdevice *ds, *fds; 3339 cap_rights_t rights; 3340 int buflen, error, ret; 3341 char *buf, *cp, *cp2, *cp3; 3342 char fname[PNFS_FILENAME_LEN + 1]; 3343 3344 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3345 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3346 if (error) 3347 goto out; 3348 /* 3349 * Since we don't know what rights might be required, 3350 * pretend that we need them all. It is better to be too 3351 * careful than too reckless. 3352 */ 3353 error = fget(td, sockarg.sock, 3354 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3355 if (error != 0) 3356 goto out; 3357 if (fp->f_type != DTYPE_SOCKET) { 3358 fdrop(fp, td); 3359 error = EPERM; 3360 goto out; 3361 } 3362 error = nfsrvd_addsock(fp); 3363 fdrop(fp, td); 3364 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3365 if (uap->argp == NULL) { 3366 error = EINVAL; 3367 goto out; 3368 } 3369 if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) { 3370 error = copyin(uap->argp, &onfsdarg, sizeof(onfsdarg)); 3371 if (error == 0) { 3372 nfsdarg.principal = onfsdarg.principal; 3373 nfsdarg.minthreads = onfsdarg.minthreads; 3374 nfsdarg.maxthreads = onfsdarg.maxthreads; 3375 nfsdarg.version = 1; 3376 nfsdarg.addr = NULL; 3377 nfsdarg.addrlen = 0; 3378 nfsdarg.dnshost = NULL; 3379 nfsdarg.dnshostlen = 0; 3380 nfsdarg.dspath = NULL; 3381 nfsdarg.dspathlen = 0; 3382 nfsdarg.mdspath = NULL; 3383 nfsdarg.mdspathlen = 0; 3384 nfsdarg.mirrorcnt = 1; 3385 } 3386 } else 3387 error = copyin(uap->argp, &nfsdarg, sizeof(nfsdarg)); 3388 if (error) 3389 goto out; 3390 if (nfsdarg.addrlen > 0 && nfsdarg.addrlen < 10000 && 3391 nfsdarg.dnshostlen > 0 && nfsdarg.dnshostlen < 10000 && 3392 nfsdarg.dspathlen > 0 && nfsdarg.dspathlen < 10000 && 3393 nfsdarg.mdspathlen > 0 && nfsdarg.mdspathlen < 10000 && 3394 nfsdarg.mirrorcnt >= 1 && 3395 nfsdarg.mirrorcnt <= NFSDEV_MAXMIRRORS && 3396 nfsdarg.addr != NULL && nfsdarg.dnshost != NULL && 3397 nfsdarg.dspath != NULL && nfsdarg.mdspath != NULL) { 3398 NFSD_DEBUG(1, "addrlen=%d dspathlen=%d dnslen=%d" 3399 " mdspathlen=%d mirrorcnt=%d\n", nfsdarg.addrlen, 3400 nfsdarg.dspathlen, nfsdarg.dnshostlen, 3401 nfsdarg.mdspathlen, nfsdarg.mirrorcnt); 3402 cp = malloc(nfsdarg.addrlen + 1, M_TEMP, M_WAITOK); 3403 error = copyin(nfsdarg.addr, cp, nfsdarg.addrlen); 3404 if (error != 0) { 3405 free(cp, M_TEMP); 3406 goto out; 3407 } 3408 cp[nfsdarg.addrlen] = '\0'; /* Ensure nul term. */ 3409 nfsdarg.addr = cp; 3410 cp = malloc(nfsdarg.dnshostlen + 1, M_TEMP, M_WAITOK); 3411 error = copyin(nfsdarg.dnshost, cp, nfsdarg.dnshostlen); 3412 if (error != 0) { 3413 free(nfsdarg.addr, M_TEMP); 3414 free(cp, M_TEMP); 3415 goto out; 3416 } 3417 cp[nfsdarg.dnshostlen] = '\0'; /* Ensure nul term. */ 3418 nfsdarg.dnshost = cp; 3419 cp = malloc(nfsdarg.dspathlen + 1, M_TEMP, M_WAITOK); 3420 error = copyin(nfsdarg.dspath, cp, nfsdarg.dspathlen); 3421 if (error != 0) { 3422 free(nfsdarg.addr, M_TEMP); 3423 free(nfsdarg.dnshost, M_TEMP); 3424 free(cp, M_TEMP); 3425 goto out; 3426 } 3427 cp[nfsdarg.dspathlen] = '\0'; /* Ensure nul term. */ 3428 nfsdarg.dspath = cp; 3429 cp = malloc(nfsdarg.mdspathlen + 1, M_TEMP, M_WAITOK); 3430 error = copyin(nfsdarg.mdspath, cp, nfsdarg.mdspathlen); 3431 if (error != 0) { 3432 free(nfsdarg.addr, M_TEMP); 3433 free(nfsdarg.dnshost, M_TEMP); 3434 free(nfsdarg.dspath, M_TEMP); 3435 free(cp, M_TEMP); 3436 goto out; 3437 } 3438 cp[nfsdarg.mdspathlen] = '\0'; /* Ensure nul term. */ 3439 nfsdarg.mdspath = cp; 3440 } else { 3441 nfsdarg.addr = NULL; 3442 nfsdarg.addrlen = 0; 3443 nfsdarg.dnshost = NULL; 3444 nfsdarg.dnshostlen = 0; 3445 nfsdarg.dspath = NULL; 3446 nfsdarg.dspathlen = 0; 3447 nfsdarg.mdspath = NULL; 3448 nfsdarg.mdspathlen = 0; 3449 nfsdarg.mirrorcnt = 1; 3450 } 3451 error = nfsrvd_nfsd(td, &nfsdarg); 3452 free(nfsdarg.addr, M_TEMP); 3453 free(nfsdarg.dnshost, M_TEMP); 3454 free(nfsdarg.dspath, M_TEMP); 3455 free(nfsdarg.mdspath, M_TEMP); 3456 } else if (uap->flag & NFSSVC_PNFSDS) { 3457 error = copyin(uap->argp, &pnfsdarg, sizeof(pnfsdarg)); 3458 if (error == 0 && (pnfsdarg.op == PNFSDOP_DELDSSERVER || 3459 pnfsdarg.op == PNFSDOP_FORCEDELDS)) { 3460 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3461 error = copyinstr(pnfsdarg.dspath, cp, PATH_MAX + 1, 3462 NULL); 3463 if (error == 0) 3464 error = nfsrv_deldsserver(pnfsdarg.op, cp, td); 3465 free(cp, M_TEMP); 3466 } else if (error == 0 && pnfsdarg.op == PNFSDOP_COPYMR) { 3467 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3468 buflen = sizeof(*pf) * NFSDEV_MAXMIRRORS; 3469 buf = malloc(buflen, M_TEMP, M_WAITOK); 3470 error = copyinstr(pnfsdarg.mdspath, cp, PATH_MAX + 1, 3471 NULL); 3472 NFSD_DEBUG(4, "pnfsdcopymr cp mdspath=%d\n", error); 3473 if (error == 0 && pnfsdarg.dspath != NULL) { 3474 cp2 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3475 error = copyinstr(pnfsdarg.dspath, cp2, 3476 PATH_MAX + 1, NULL); 3477 NFSD_DEBUG(4, "pnfsdcopymr cp dspath=%d\n", 3478 error); 3479 } else 3480 cp2 = NULL; 3481 if (error == 0 && pnfsdarg.curdspath != NULL) { 3482 cp3 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3483 error = copyinstr(pnfsdarg.curdspath, cp3, 3484 PATH_MAX + 1, NULL); 3485 NFSD_DEBUG(4, "pnfsdcopymr cp curdspath=%d\n", 3486 error); 3487 } else 3488 cp3 = NULL; 3489 curdvp = NULL; 3490 fds = NULL; 3491 if (error == 0) 3492 error = nfsrv_mdscopymr(cp, cp2, cp3, buf, 3493 &buflen, fname, td, &vp, &nvp, &pf, &ds, 3494 &fds); 3495 NFSD_DEBUG(4, "nfsrv_mdscopymr=%d\n", error); 3496 if (error == 0) { 3497 if (pf->dsf_dir >= nfsrv_dsdirsize) { 3498 printf("copymr: dsdir out of range\n"); 3499 pf->dsf_dir = 0; 3500 } 3501 NFSD_DEBUG(4, "copymr: buflen=%d\n", buflen); 3502 error = nfsrv_copymr(vp, nvp, 3503 ds->nfsdev_dsdir[pf->dsf_dir], ds, pf, 3504 (struct pnfsdsfile *)buf, 3505 buflen / sizeof(*pf), td->td_ucred, td); 3506 vput(vp); 3507 vput(nvp); 3508 if (fds != NULL && error == 0) { 3509 curdvp = fds->nfsdev_dsdir[pf->dsf_dir]; 3510 ret = vn_lock(curdvp, LK_EXCLUSIVE); 3511 if (ret == 0) { 3512 nfsrv_dsremove(curdvp, fname, 3513 td->td_ucred, td); 3514 NFSVOPUNLOCK(curdvp, 0); 3515 } 3516 } 3517 NFSD_DEBUG(4, "nfsrv_copymr=%d\n", error); 3518 } 3519 free(cp, M_TEMP); 3520 free(cp2, M_TEMP); 3521 free(cp3, M_TEMP); 3522 free(buf, M_TEMP); 3523 } 3524 } else { 3525 error = nfssvc_srvcall(td, uap, td->td_ucred); 3526 } 3527 3528 out: 3529 NFSEXITCODE(error); 3530 return (error); 3531 } 3532 3533 static int 3534 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3535 { 3536 struct nfsex_args export; 3537 struct file *fp = NULL; 3538 int stablefd, len; 3539 struct nfsd_clid adminrevoke; 3540 struct nfsd_dumplist dumplist; 3541 struct nfsd_dumpclients *dumpclients; 3542 struct nfsd_dumplocklist dumplocklist; 3543 struct nfsd_dumplocks *dumplocks; 3544 struct nameidata nd; 3545 vnode_t vp; 3546 int error = EINVAL, igotlock; 3547 struct proc *procp; 3548 static int suspend_nfsd = 0; 3549 3550 if (uap->flag & NFSSVC_PUBLICFH) { 3551 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3552 sizeof (fhandle_t)); 3553 error = copyin(uap->argp, 3554 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3555 if (!error) 3556 nfs_pubfhset = 1; 3557 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3558 error = copyin(uap->argp,(caddr_t)&export, 3559 sizeof (struct nfsex_args)); 3560 if (!error) 3561 error = nfsrv_v4rootexport(&export, cred, p); 3562 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3563 nfs_pubfhset = 0; 3564 error = 0; 3565 } else if (uap->flag & NFSSVC_STABLERESTART) { 3566 error = copyin(uap->argp, (caddr_t)&stablefd, 3567 sizeof (int)); 3568 if (!error) 3569 error = fp_getfvp(p, stablefd, &fp, &vp); 3570 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3571 error = EBADF; 3572 if (!error && newnfs_numnfsd != 0) 3573 error = EPERM; 3574 if (!error) { 3575 nfsrv_stablefirst.nsf_fp = fp; 3576 nfsrv_setupstable(p); 3577 } 3578 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3579 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3580 sizeof (struct nfsd_clid)); 3581 if (!error) 3582 error = nfsrv_adminrevoke(&adminrevoke, p); 3583 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3584 error = copyin(uap->argp, (caddr_t)&dumplist, 3585 sizeof (struct nfsd_dumplist)); 3586 if (!error && (dumplist.ndl_size < 1 || 3587 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3588 error = EPERM; 3589 if (!error) { 3590 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3591 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3592 M_TEMP, M_WAITOK); 3593 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3594 error = copyout(dumpclients, 3595 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3596 free(dumpclients, M_TEMP); 3597 } 3598 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3599 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3600 sizeof (struct nfsd_dumplocklist)); 3601 if (!error && (dumplocklist.ndllck_size < 1 || 3602 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3603 error = EPERM; 3604 if (!error) 3605 error = nfsrv_lookupfilename(&nd, 3606 dumplocklist.ndllck_fname, p); 3607 if (!error) { 3608 len = sizeof (struct nfsd_dumplocks) * 3609 dumplocklist.ndllck_size; 3610 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3611 M_TEMP, M_WAITOK); 3612 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3613 dumplocklist.ndllck_size, p); 3614 vput(nd.ni_vp); 3615 error = copyout(dumplocks, 3616 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3617 free(dumplocks, M_TEMP); 3618 } 3619 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3620 procp = p->td_proc; 3621 PROC_LOCK(procp); 3622 nfsd_master_pid = procp->p_pid; 3623 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3624 nfsd_master_start = procp->p_stats->p_start; 3625 nfsd_master_proc = procp; 3626 PROC_UNLOCK(procp); 3627 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3628 NFSLOCKV4ROOTMUTEX(); 3629 if (suspend_nfsd == 0) { 3630 /* Lock out all nfsd threads */ 3631 do { 3632 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3633 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3634 } while (igotlock == 0 && suspend_nfsd == 0); 3635 suspend_nfsd = 1; 3636 } 3637 NFSUNLOCKV4ROOTMUTEX(); 3638 error = 0; 3639 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3640 NFSLOCKV4ROOTMUTEX(); 3641 if (suspend_nfsd != 0) { 3642 nfsv4_unlock(&nfsd_suspend_lock, 0); 3643 suspend_nfsd = 0; 3644 } 3645 NFSUNLOCKV4ROOTMUTEX(); 3646 error = 0; 3647 } 3648 3649 NFSEXITCODE(error); 3650 return (error); 3651 } 3652 3653 /* 3654 * Check exports. 3655 * Returns 0 if ok, 1 otherwise. 3656 */ 3657 int 3658 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3659 { 3660 int i; 3661 3662 /* 3663 * This seems odd, but allow the case where the security flavor 3664 * list is empty. This happens when NFSv4 is traversing non-exported 3665 * file systems. Exported file systems should always have a non-empty 3666 * security flavor list. 3667 */ 3668 if (exp->nes_numsecflavor == 0) 3669 return (0); 3670 3671 for (i = 0; i < exp->nes_numsecflavor; i++) { 3672 /* 3673 * The tests for privacy and integrity must be first, 3674 * since ND_GSS is set for everything but AUTH_SYS. 3675 */ 3676 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3677 (nd->nd_flag & ND_GSSPRIVACY)) 3678 return (0); 3679 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3680 (nd->nd_flag & ND_GSSINTEGRITY)) 3681 return (0); 3682 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3683 (nd->nd_flag & ND_GSS)) 3684 return (0); 3685 if (exp->nes_secflavors[i] == AUTH_SYS && 3686 (nd->nd_flag & ND_GSS) == 0) 3687 return (0); 3688 } 3689 return (1); 3690 } 3691 3692 /* 3693 * Calculate a hash value for the fid in a file handle. 3694 */ 3695 uint32_t 3696 nfsrv_hashfh(fhandle_t *fhp) 3697 { 3698 uint32_t hashval; 3699 3700 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3701 return (hashval); 3702 } 3703 3704 /* 3705 * Calculate a hash value for the sessionid. 3706 */ 3707 uint32_t 3708 nfsrv_hashsessionid(uint8_t *sessionid) 3709 { 3710 uint32_t hashval; 3711 3712 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3713 return (hashval); 3714 } 3715 3716 /* 3717 * Signal the userland master nfsd to backup the stable restart file. 3718 */ 3719 void 3720 nfsrv_backupstable(void) 3721 { 3722 struct proc *procp; 3723 3724 if (nfsd_master_proc != NULL) { 3725 procp = pfind(nfsd_master_pid); 3726 /* Try to make sure it is the correct process. */ 3727 if (procp == nfsd_master_proc && 3728 procp->p_stats->p_start.tv_sec == 3729 nfsd_master_start.tv_sec && 3730 procp->p_stats->p_start.tv_usec == 3731 nfsd_master_start.tv_usec && 3732 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3733 kern_psignal(procp, SIGUSR2); 3734 else 3735 nfsd_master_proc = NULL; 3736 3737 if (procp != NULL) 3738 PROC_UNLOCK(procp); 3739 } 3740 } 3741 3742 /* 3743 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 3744 * The arguments are in a structure, so that they can be passed through 3745 * taskqueue for a kernel process to execute this function. 3746 */ 3747 struct nfsrvdscreate { 3748 int done; 3749 int inprog; 3750 struct task tsk; 3751 struct ucred *tcred; 3752 struct vnode *dvp; 3753 NFSPROC_T *p; 3754 struct pnfsdsfile *pf; 3755 int err; 3756 fhandle_t fh; 3757 struct vattr va; 3758 struct vattr createva; 3759 }; 3760 3761 int 3762 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 3763 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 3764 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 3765 { 3766 struct vnode *nvp; 3767 struct nameidata named; 3768 struct vattr va; 3769 char *bufp; 3770 u_long *hashp; 3771 struct nfsnode *np; 3772 struct nfsmount *nmp; 3773 int error; 3774 3775 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 3776 LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE); 3777 nfsvno_setpathbuf(&named, &bufp, &hashp); 3778 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 3779 named.ni_cnd.cn_thread = p; 3780 named.ni_cnd.cn_nameptr = bufp; 3781 if (fnamep != NULL) { 3782 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 3783 named.ni_cnd.cn_namelen = strlen(bufp); 3784 } else 3785 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 3786 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 3787 3788 /* Create the date file in the DS mount. */ 3789 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 3790 if (error == 0) { 3791 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 3792 NFSVOPUNLOCK(dvp, 0); 3793 if (error == 0) { 3794 /* Set the ownership of the file. */ 3795 error = VOP_SETATTR(nvp, nvap, tcred); 3796 NFSD_DEBUG(4, "nfsrv_dscreate:" 3797 " setattr-uid=%d\n", error); 3798 if (error != 0) 3799 vput(nvp); 3800 } 3801 if (error != 0) 3802 printf("pNFS: pnfscreate failed=%d\n", error); 3803 } else 3804 printf("pNFS: pnfscreate vnlock=%d\n", error); 3805 if (error == 0) { 3806 np = VTONFS(nvp); 3807 nmp = VFSTONFS(nvp->v_mount); 3808 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 3809 != 0 || nmp->nm_nam->sa_len > sizeof( 3810 struct sockaddr_in6) || 3811 np->n_fhp->nfh_len != NFSX_MYFH) { 3812 printf("Bad DS file: fstype=%s salen=%d" 3813 " fhlen=%d\n", 3814 nvp->v_mount->mnt_vfc->vfc_name, 3815 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 3816 error = ENOENT; 3817 } 3818 3819 /* Set extattrs for the DS on the MDS file. */ 3820 if (error == 0) { 3821 if (dsa != NULL) { 3822 error = VOP_GETATTR(nvp, &va, tcred); 3823 if (error == 0) { 3824 dsa->dsa_filerev = va.va_filerev; 3825 dsa->dsa_size = va.va_size; 3826 dsa->dsa_atime = va.va_atime; 3827 dsa->dsa_mtime = va.va_mtime; 3828 } 3829 } 3830 if (error == 0) { 3831 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 3832 NFSX_MYFH); 3833 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 3834 nmp->nm_nam->sa_len); 3835 NFSBCOPY(named.ni_cnd.cn_nameptr, 3836 pf->dsf_filename, 3837 sizeof(pf->dsf_filename)); 3838 } 3839 } else 3840 printf("pNFS: pnfscreate can't get DS" 3841 " attr=%d\n", error); 3842 if (nvpp != NULL && error == 0) 3843 *nvpp = nvp; 3844 else 3845 vput(nvp); 3846 } 3847 nfsvno_relpathbuf(&named); 3848 return (error); 3849 } 3850 3851 /* 3852 * Start up the thread that will execute nfsrv_dscreate(). 3853 */ 3854 static void 3855 start_dscreate(void *arg, int pending) 3856 { 3857 struct nfsrvdscreate *dsc; 3858 3859 dsc = (struct nfsrvdscreate *)arg; 3860 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 3861 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 3862 dsc->done = 1; 3863 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 3864 } 3865 3866 /* 3867 * Create a pNFS data file on the Data Server(s). 3868 */ 3869 static void 3870 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 3871 NFSPROC_T *p) 3872 { 3873 struct nfsrvdscreate *dsc, *tdsc; 3874 struct nfsdevice *ds, *tds, *fds; 3875 struct mount *mp; 3876 struct pnfsdsfile *pf, *tpf; 3877 struct pnfsdsattr dsattr; 3878 struct vattr va; 3879 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 3880 struct nfsmount *nmp; 3881 fhandle_t fh; 3882 uid_t vauid; 3883 gid_t vagid; 3884 u_short vamode; 3885 struct ucred *tcred; 3886 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 3887 int failpos, timo; 3888 3889 /* Get a DS server directory in a round-robin order. */ 3890 mirrorcnt = 1; 3891 mp = vp->v_mount; 3892 ds = fds = NULL; 3893 NFSDDSLOCK(); 3894 /* 3895 * Search for the first entry that handles this MDS fs, but use the 3896 * first entry for all MDS fs's otherwise. 3897 */ 3898 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 3899 if (tds->nfsdev_nmp != NULL) { 3900 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 3901 ds = tds; 3902 else if (tds->nfsdev_mdsisset != 0 && 3903 mp->mnt_stat.f_fsid.val[0] == 3904 tds->nfsdev_mdsfsid.val[0] && 3905 mp->mnt_stat.f_fsid.val[1] == 3906 tds->nfsdev_mdsfsid.val[1]) { 3907 ds = fds = tds; 3908 break; 3909 } 3910 } 3911 } 3912 if (ds == NULL) { 3913 NFSDDSUNLOCK(); 3914 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 3915 return; 3916 } 3917 i = dsdir[0] = ds->nfsdev_nextdir; 3918 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 3919 dvp[0] = ds->nfsdev_dsdir[i]; 3920 tds = TAILQ_NEXT(ds, nfsdev_list); 3921 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 3922 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 3923 if (tds->nfsdev_nmp != NULL && 3924 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 3925 (tds->nfsdev_mdsisset != 0 && fds != NULL && 3926 mp->mnt_stat.f_fsid.val[0] == 3927 tds->nfsdev_mdsfsid.val[0] && 3928 mp->mnt_stat.f_fsid.val[1] == 3929 tds->nfsdev_mdsfsid.val[1]))) { 3930 dsdir[mirrorcnt] = i; 3931 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 3932 mirrorcnt++; 3933 if (mirrorcnt >= nfsrv_maxpnfsmirror) 3934 break; 3935 } 3936 } 3937 } 3938 /* Put at end of list to implement round-robin usage. */ 3939 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 3940 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 3941 NFSDDSUNLOCK(); 3942 dsc = NULL; 3943 if (mirrorcnt > 1) 3944 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 3945 M_WAITOK | M_ZERO); 3946 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 3947 M_ZERO); 3948 3949 error = nfsvno_getfh(vp, &fh, p); 3950 if (error == 0) 3951 error = VOP_GETATTR(vp, &va, cred); 3952 if (error == 0) { 3953 /* Set the attributes for "vp" to Setattr the DS vp. */ 3954 vauid = va.va_uid; 3955 vagid = va.va_gid; 3956 vamode = va.va_mode; 3957 VATTR_NULL(&va); 3958 va.va_uid = vauid; 3959 va.va_gid = vagid; 3960 va.va_mode = vamode; 3961 va.va_size = 0; 3962 } else 3963 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 3964 3965 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 3966 cred->cr_gid); 3967 /* Make data file name based on FH. */ 3968 tcred = newnfs_getcred(); 3969 3970 /* 3971 * Create the file on each DS mirror, using kernel process(es) for the 3972 * additional mirrors. 3973 */ 3974 failpos = -1; 3975 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 3976 tpf->dsf_dir = dsdir[i]; 3977 tdsc->tcred = tcred; 3978 tdsc->p = p; 3979 tdsc->pf = tpf; 3980 tdsc->createva = *vap; 3981 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 3982 tdsc->va = va; 3983 tdsc->dvp = dvp[i]; 3984 tdsc->done = 0; 3985 tdsc->inprog = 0; 3986 tdsc->err = 0; 3987 ret = EIO; 3988 if (nfs_pnfsiothreads != 0) { 3989 ret = nfs_pnfsio(start_dscreate, tdsc); 3990 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 3991 } 3992 if (ret != 0) { 3993 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 3994 NULL, tcred, p, NULL); 3995 if (ret != 0) { 3996 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 3997 error)); 3998 if (failpos == -1 && nfsds_failerr(ret)) 3999 failpos = i; 4000 else 4001 error = ret; 4002 } 4003 } 4004 } 4005 if (error == 0) { 4006 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4007 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4008 &dsattr, NULL, tcred, p, NULL); 4009 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4010 failpos = mirrorcnt - 1; 4011 error = 0; 4012 } 4013 } 4014 timo = hz / 50; /* Wait for 20msec. */ 4015 if (timo < 1) 4016 timo = 1; 4017 /* Wait for kernel task(s) to complete. */ 4018 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4019 while (tdsc->inprog != 0 && tdsc->done == 0) 4020 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4021 if (tdsc->err != 0) { 4022 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4023 failpos = i; 4024 else if (error == 0) 4025 error = tdsc->err; 4026 } 4027 } 4028 4029 /* 4030 * If failpos has been set, that mirror has failed, so it needs 4031 * to be disabled. 4032 */ 4033 if (failpos >= 0) { 4034 nmp = VFSTONFS(dvp[failpos]->v_mount); 4035 NFSLOCKMNT(nmp); 4036 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4037 NFSMNTP_CANCELRPCS)) == 0) { 4038 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4039 NFSUNLOCKMNT(nmp); 4040 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4041 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4042 ds); 4043 if (ds != NULL) 4044 nfsrv_killrpcs(nmp); 4045 NFSLOCKMNT(nmp); 4046 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4047 wakeup(nmp); 4048 } 4049 NFSUNLOCKMNT(nmp); 4050 } 4051 4052 NFSFREECRED(tcred); 4053 if (error == 0) { 4054 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4055 4056 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4057 mirrorcnt, nfsrv_maxpnfsmirror); 4058 /* 4059 * For all mirrors that couldn't be created, fill in the 4060 * *pf structure, but with an IP address == 0.0.0.0. 4061 */ 4062 tpf = pf + mirrorcnt; 4063 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4064 *tpf = *pf; 4065 tpf->dsf_sin.sin_family = AF_INET; 4066 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4067 tpf->dsf_sin.sin_addr.s_addr = 0; 4068 tpf->dsf_sin.sin_port = 0; 4069 } 4070 4071 error = vn_extattr_set(vp, IO_NODELOCKED, 4072 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4073 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4074 if (error == 0) 4075 error = vn_extattr_set(vp, IO_NODELOCKED, 4076 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4077 sizeof(dsattr), (char *)&dsattr, p); 4078 if (error != 0) 4079 printf("pNFS: pnfscreate setextattr=%d\n", 4080 error); 4081 } else 4082 printf("pNFS: pnfscreate=%d\n", error); 4083 free(pf, M_TEMP); 4084 free(dsc, M_TEMP); 4085 } 4086 4087 /* 4088 * Get the information needed to remove the pNFS Data Server file from the 4089 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4090 * DS directory vnode. The caller must unlock *ddvp when done with it. 4091 */ 4092 static void 4093 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4094 int *mirrorcntp, char *fname, fhandle_t *fhp) 4095 { 4096 struct vattr va; 4097 struct ucred *tcred; 4098 char *buf; 4099 int buflen, error; 4100 4101 dvpp[0] = NULL; 4102 /* If not an exported regular file or not a pNFS server, just return. */ 4103 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4104 nfsrv_devidcnt == 0) 4105 return; 4106 4107 /* Check to see if this is the last hard link. */ 4108 tcred = newnfs_getcred(); 4109 error = VOP_GETATTR(vp, &va, tcred); 4110 NFSFREECRED(tcred); 4111 if (error != 0) { 4112 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4113 return; 4114 } 4115 if (va.va_nlink > 1) 4116 return; 4117 4118 error = nfsvno_getfh(vp, fhp, p); 4119 if (error != 0) { 4120 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4121 return; 4122 } 4123 4124 buflen = 1024; 4125 buf = malloc(buflen, M_TEMP, M_WAITOK); 4126 /* Get the directory vnode for the DS mount and the file handle. */ 4127 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4128 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4129 free(buf, M_TEMP); 4130 if (error != 0) 4131 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4132 } 4133 4134 /* 4135 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4136 * The arguments are in a structure, so that they can be passed through 4137 * taskqueue for a kernel process to execute this function. 4138 */ 4139 struct nfsrvdsremove { 4140 int done; 4141 int inprog; 4142 struct task tsk; 4143 struct ucred *tcred; 4144 struct vnode *dvp; 4145 NFSPROC_T *p; 4146 int err; 4147 char fname[PNFS_FILENAME_LEN + 1]; 4148 }; 4149 4150 static int 4151 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4152 NFSPROC_T *p) 4153 { 4154 struct nameidata named; 4155 struct vnode *nvp; 4156 char *bufp; 4157 u_long *hashp; 4158 int error; 4159 4160 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4161 if (error != 0) 4162 return (error); 4163 named.ni_cnd.cn_nameiop = DELETE; 4164 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4165 named.ni_cnd.cn_cred = tcred; 4166 named.ni_cnd.cn_thread = p; 4167 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 4168 nfsvno_setpathbuf(&named, &bufp, &hashp); 4169 named.ni_cnd.cn_nameptr = bufp; 4170 named.ni_cnd.cn_namelen = strlen(fname); 4171 strlcpy(bufp, fname, NAME_MAX); 4172 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4173 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4174 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4175 if (error == 0) { 4176 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4177 vput(nvp); 4178 } 4179 NFSVOPUNLOCK(dvp, 0); 4180 nfsvno_relpathbuf(&named); 4181 if (error != 0) 4182 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4183 return (error); 4184 } 4185 4186 /* 4187 * Start up the thread that will execute nfsrv_dsremove(). 4188 */ 4189 static void 4190 start_dsremove(void *arg, int pending) 4191 { 4192 struct nfsrvdsremove *dsrm; 4193 4194 dsrm = (struct nfsrvdsremove *)arg; 4195 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4196 dsrm->p); 4197 dsrm->done = 1; 4198 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4199 } 4200 4201 /* 4202 * Remove a pNFS data file from a Data Server. 4203 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4204 * removed to set up the dvp and fill in the FH. 4205 */ 4206 static void 4207 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4208 NFSPROC_T *p) 4209 { 4210 struct ucred *tcred; 4211 struct nfsrvdsremove *dsrm, *tdsrm; 4212 struct nfsdevice *ds; 4213 struct nfsmount *nmp; 4214 int failpos, i, ret, timo; 4215 4216 tcred = newnfs_getcred(); 4217 dsrm = NULL; 4218 if (mirrorcnt > 1) 4219 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4220 /* 4221 * Remove the file on each DS mirror, using kernel process(es) for the 4222 * additional mirrors. 4223 */ 4224 failpos = -1; 4225 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4226 tdsrm->tcred = tcred; 4227 tdsrm->p = p; 4228 tdsrm->dvp = dvp[i]; 4229 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4230 tdsrm->inprog = 0; 4231 tdsrm->done = 0; 4232 tdsrm->err = 0; 4233 ret = EIO; 4234 if (nfs_pnfsiothreads != 0) { 4235 ret = nfs_pnfsio(start_dsremove, tdsrm); 4236 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4237 } 4238 if (ret != 0) { 4239 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4240 if (failpos == -1 && nfsds_failerr(ret)) 4241 failpos = i; 4242 } 4243 } 4244 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4245 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4246 failpos = mirrorcnt - 1; 4247 timo = hz / 50; /* Wait for 20msec. */ 4248 if (timo < 1) 4249 timo = 1; 4250 /* Wait for kernel task(s) to complete. */ 4251 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4252 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4253 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4254 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4255 failpos = i; 4256 } 4257 4258 /* 4259 * If failpos has been set, that mirror has failed, so it needs 4260 * to be disabled. 4261 */ 4262 if (failpos >= 0) { 4263 nmp = VFSTONFS(dvp[failpos]->v_mount); 4264 NFSLOCKMNT(nmp); 4265 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4266 NFSMNTP_CANCELRPCS)) == 0) { 4267 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4268 NFSUNLOCKMNT(nmp); 4269 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4270 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4271 ds); 4272 if (ds != NULL) 4273 nfsrv_killrpcs(nmp); 4274 NFSLOCKMNT(nmp); 4275 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4276 wakeup(nmp); 4277 } 4278 NFSUNLOCKMNT(nmp); 4279 } 4280 4281 /* Get rid all layouts for the file. */ 4282 nfsrv_freefilelayouts(fhp); 4283 4284 NFSFREECRED(tcred); 4285 free(dsrm, M_TEMP); 4286 } 4287 4288 /* 4289 * Generate a file name based on the file handle and put it in *bufp. 4290 * Return the number of bytes generated. 4291 */ 4292 static int 4293 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4294 { 4295 int i; 4296 uint8_t *cp; 4297 const uint8_t *hexdigits = "0123456789abcdef"; 4298 4299 cp = (uint8_t *)fhp; 4300 for (i = 0; i < sizeof(*fhp); i++) { 4301 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4302 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4303 } 4304 bufp[2 * i] = '\0'; 4305 return (2 * i); 4306 } 4307 4308 /* 4309 * Update the Metadata file's attributes from the DS file when a Read/Write 4310 * layout is returned. 4311 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4312 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4313 */ 4314 int 4315 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4316 { 4317 struct ucred *tcred; 4318 int error; 4319 4320 /* Do this as root so that it won't fail with EACCES. */ 4321 tcred = newnfs_getcred(); 4322 error = nfsrv_proxyds(NULL, vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4323 NULL, NULL, NULL, nap, NULL); 4324 NFSFREECRED(tcred); 4325 return (error); 4326 } 4327 4328 /* 4329 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4330 */ 4331 static int 4332 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4333 NFSPROC_T *p) 4334 { 4335 int error; 4336 4337 error = nfsrv_proxyds(NULL, vp, 0, 0, cred, p, NFSPROC_SETACL, 4338 NULL, NULL, NULL, NULL, aclp); 4339 return (error); 4340 } 4341 4342 static int 4343 nfsrv_proxyds(struct nfsrv_descript *nd, struct vnode *vp, off_t off, int cnt, 4344 struct ucred *cred, struct thread *p, int ioproc, struct mbuf **mpp, 4345 char *cp, struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp) 4346 { 4347 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4348 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4349 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4350 struct nfsdevice *ds; 4351 struct pnfsdsattr dsattr; 4352 char *buf; 4353 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4354 4355 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4356 /* 4357 * If not a regular file, not exported or not a pNFS server, 4358 * just return ENOENT. 4359 */ 4360 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4361 nfsrv_devidcnt == 0) 4362 return (ENOENT); 4363 4364 buflen = 1024; 4365 buf = malloc(buflen, M_TEMP, M_WAITOK); 4366 error = 0; 4367 4368 /* 4369 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4370 * from the MetaData file's extended attribute. 4371 */ 4372 if (ioproc == NFSPROC_GETATTR) { 4373 error = vn_extattr_get(vp, IO_NODELOCKED, 4374 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4375 p); 4376 if (error == 0 && buflen != sizeof(dsattr)) 4377 error = ENXIO; 4378 if (error == 0) { 4379 NFSBCOPY(buf, &dsattr, buflen); 4380 nap->na_filerev = dsattr.dsa_filerev; 4381 nap->na_size = dsattr.dsa_size; 4382 nap->na_atime = dsattr.dsa_atime; 4383 nap->na_mtime = dsattr.dsa_mtime; 4384 4385 /* 4386 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4387 * returns 0, just return now. nfsrv_checkdsattr() 4388 * returns 0 if there is no Read/Write layout 4389 * plus either an Open/Write_access or Write 4390 * delegation issued to a client for the file. 4391 */ 4392 if (nfsrv_pnfsgetdsattr == 0 || 4393 nfsrv_checkdsattr(nd, vp, p) == 0) { 4394 free(buf, M_TEMP); 4395 return (error); 4396 } 4397 } 4398 4399 /* 4400 * Clear ENOATTR so the code below will attempt to do a 4401 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4402 * the extended attribute. 4403 */ 4404 if (error == ENOATTR) 4405 error = 0; 4406 } 4407 4408 origmircnt = -1; 4409 trycnt = 0; 4410 tryagain: 4411 if (error == 0) { 4412 buflen = 1024; 4413 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4414 LK_EXCLUSIVE) 4415 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4416 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4417 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4418 NULL, NULL); 4419 if (error == 0) { 4420 for (i = 0; i < mirrorcnt; i++) 4421 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4422 } else 4423 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4424 } else 4425 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4426 if (error == 0) { 4427 failpos = -1; 4428 if (origmircnt == -1) 4429 origmircnt = mirrorcnt; 4430 /* 4431 * If failpos is set to a mirror#, then that mirror has 4432 * failed and will be disabled. For Read and Getattr, the 4433 * function only tries one mirror, so if that mirror has 4434 * failed, it will need to be retried. As such, increment 4435 * tryitagain for these cases. 4436 * For Write, Setattr and Setacl, the function tries all 4437 * mirrors and will not return an error for the case where 4438 * one mirror has failed. For these cases, the functioning 4439 * mirror(s) will have been modified, so a retry isn't 4440 * necessary. These functions will set failpos for the 4441 * failed mirror#. 4442 */ 4443 if (ioproc == NFSPROC_READDS) { 4444 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4445 mpp, mpp2); 4446 if (nfsds_failerr(error) && mirrorcnt > 1) { 4447 /* 4448 * Setting failpos will cause the mirror 4449 * to be disabled and then a retry of this 4450 * read is required. 4451 */ 4452 failpos = 0; 4453 error = 0; 4454 trycnt++; 4455 } 4456 } else if (ioproc == NFSPROC_WRITEDS) 4457 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4458 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4459 else if (ioproc == NFSPROC_SETATTR) 4460 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4461 mirrorcnt, nap, &failpos); 4462 else if (ioproc == NFSPROC_SETACL) 4463 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4464 mirrorcnt, aclp, &failpos); 4465 else { 4466 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4467 vp, nmp[mirrorcnt - 1], nap); 4468 if (nfsds_failerr(error) && mirrorcnt > 1) { 4469 /* 4470 * Setting failpos will cause the mirror 4471 * to be disabled and then a retry of this 4472 * getattr is required. 4473 */ 4474 failpos = mirrorcnt - 1; 4475 error = 0; 4476 trycnt++; 4477 } 4478 } 4479 ds = NULL; 4480 if (failpos >= 0) { 4481 failnmp = nmp[failpos]; 4482 NFSLOCKMNT(failnmp); 4483 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4484 NFSMNTP_CANCELRPCS)) == 0) { 4485 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4486 NFSUNLOCKMNT(failnmp); 4487 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4488 failnmp, p); 4489 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4490 failpos, ds); 4491 if (ds != NULL) 4492 nfsrv_killrpcs(failnmp); 4493 NFSLOCKMNT(failnmp); 4494 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4495 wakeup(failnmp); 4496 } 4497 NFSUNLOCKMNT(failnmp); 4498 } 4499 for (i = 0; i < mirrorcnt; i++) 4500 NFSVOPUNLOCK(dvp[i], 0); 4501 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4502 trycnt); 4503 /* Try the Read/Getattr again if a mirror was deleted. */ 4504 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4505 goto tryagain; 4506 } else { 4507 /* Return ENOENT for any Extended Attribute error. */ 4508 error = ENOENT; 4509 } 4510 free(buf, M_TEMP); 4511 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4512 return (error); 4513 } 4514 4515 /* 4516 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4517 * attribute. 4518 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4519 * to be checked. If it points to a NULL nmp, then it returns 4520 * a suitable destination. 4521 * curnmp - If non-NULL, it is the source mount for the copy. 4522 */ 4523 int 4524 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4525 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4526 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4527 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4528 { 4529 struct vnode *dvp, *nvp, **tdvpp; 4530 struct mount *mp; 4531 struct nfsmount *nmp, *newnmp; 4532 struct sockaddr *sad; 4533 struct sockaddr_in *sin; 4534 struct nfsdevice *ds, *tds, *fndds; 4535 struct pnfsdsfile *pf; 4536 uint32_t dsdir; 4537 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4538 4539 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4540 *mirrorcntp = 1; 4541 tdvpp = dvpp; 4542 if (nvpp != NULL) 4543 *nvpp = NULL; 4544 if (dvpp != NULL) 4545 *dvpp = NULL; 4546 if (ippos != NULL) 4547 *ippos = -1; 4548 if (newnmpp != NULL) 4549 newnmp = *newnmpp; 4550 else 4551 newnmp = NULL; 4552 mp = vp->v_mount; 4553 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4554 "pnfsd.dsfile", buflenp, buf, p); 4555 mirrorcnt = *buflenp / sizeof(*pf); 4556 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4557 *buflenp != sizeof(*pf) * mirrorcnt)) 4558 error = ENOATTR; 4559 4560 pf = (struct pnfsdsfile *)buf; 4561 /* If curnmp != NULL, check for a match in the mirror list. */ 4562 if (curnmp != NULL && error == 0) { 4563 fnd = 0; 4564 for (i = 0; i < mirrorcnt; i++, pf++) { 4565 sad = (struct sockaddr *)&pf->dsf_sin; 4566 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 4567 if (ippos != NULL) 4568 *ippos = i; 4569 fnd = 1; 4570 break; 4571 } 4572 } 4573 if (fnd == 0) 4574 error = ENXIO; 4575 } 4576 4577 gotone = 0; 4578 pf = (struct pnfsdsfile *)buf; 4579 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 4580 error); 4581 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 4582 fhiszero = 0; 4583 sad = (struct sockaddr *)&pf->dsf_sin; 4584 sin = &pf->dsf_sin; 4585 dsdir = pf->dsf_dir; 4586 if (dsdir >= nfsrv_dsdirsize) { 4587 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 4588 error = ENOATTR; 4589 } else if (nvpp != NULL && newnmp != NULL && 4590 nfsaddr2_match(sad, newnmp->nm_nam)) 4591 error = EEXIST; 4592 if (error == 0) { 4593 if (ippos != NULL && curnmp == NULL && 4594 sad->sa_family == AF_INET && 4595 sin->sin_addr.s_addr == 0) 4596 *ippos = i; 4597 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 4598 fhiszero = 1; 4599 /* Use the socket address to find the mount point. */ 4600 fndds = NULL; 4601 NFSDDSLOCK(); 4602 /* Find a match for the IP address. */ 4603 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 4604 if (ds->nfsdev_nmp != NULL) { 4605 dvp = ds->nfsdev_dvp; 4606 nmp = VFSTONFS(dvp->v_mount); 4607 if (nmp != ds->nfsdev_nmp) 4608 printf("different2 nmp %p %p\n", 4609 nmp, ds->nfsdev_nmp); 4610 if (nfsaddr2_match(sad, nmp->nm_nam)) { 4611 fndds = ds; 4612 break; 4613 } 4614 } 4615 } 4616 if (fndds != NULL && newnmpp != NULL && 4617 newnmp == NULL) { 4618 /* Search for a place to make a mirror copy. */ 4619 TAILQ_FOREACH(tds, &nfsrv_devidhead, 4620 nfsdev_list) { 4621 if (tds->nfsdev_nmp != NULL && 4622 fndds != tds && 4623 ((tds->nfsdev_mdsisset == 0 && 4624 fndds->nfsdev_mdsisset == 0) || 4625 (tds->nfsdev_mdsisset != 0 && 4626 fndds->nfsdev_mdsisset != 0 && 4627 tds->nfsdev_mdsfsid.val[0] == 4628 mp->mnt_stat.f_fsid.val[0] && 4629 tds->nfsdev_mdsfsid.val[1] == 4630 mp->mnt_stat.f_fsid.val[1]))) { 4631 *newnmpp = tds->nfsdev_nmp; 4632 break; 4633 } 4634 } 4635 if (tds != NULL) { 4636 /* 4637 * Move this entry to the end of the 4638 * list, so it won't be selected as 4639 * easily the next time. 4640 */ 4641 TAILQ_REMOVE(&nfsrv_devidhead, tds, 4642 nfsdev_list); 4643 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 4644 nfsdev_list); 4645 } 4646 } 4647 NFSDDSUNLOCK(); 4648 if (fndds != NULL) { 4649 dvp = fndds->nfsdev_dsdir[dsdir]; 4650 if (lktype != 0 || fhiszero != 0 || 4651 (nvpp != NULL && *nvpp == NULL)) { 4652 if (fhiszero != 0) 4653 error = vn_lock(dvp, 4654 LK_EXCLUSIVE); 4655 else if (lktype != 0) 4656 error = vn_lock(dvp, lktype); 4657 else 4658 error = vn_lock(dvp, LK_SHARED); 4659 /* 4660 * If the file handle is all 0's, try to 4661 * do a Lookup against the DS to acquire 4662 * it. 4663 * If dvpp == NULL or the Lookup fails, 4664 * unlock dvp after the call. 4665 */ 4666 if (error == 0 && (fhiszero != 0 || 4667 (nvpp != NULL && *nvpp == NULL))) { 4668 error = nfsrv_pnfslookupds(vp, 4669 dvp, pf, &nvp, p); 4670 if (error == 0) { 4671 if (fhiszero != 0) 4672 nfsrv_pnfssetfh( 4673 vp, pf, 4674 devid, 4675 fnamep, 4676 nvp, p); 4677 if (nvpp != NULL && 4678 *nvpp == NULL) { 4679 *nvpp = nvp; 4680 *dsdirp = dsdir; 4681 } else 4682 vput(nvp); 4683 } 4684 if (error != 0 || lktype == 0) 4685 NFSVOPUNLOCK(dvp, 0); 4686 } 4687 } 4688 if (error == 0) { 4689 gotone++; 4690 NFSD_DEBUG(4, "gotone=%d\n", gotone); 4691 if (devid != NULL) { 4692 NFSBCOPY(fndds->nfsdev_deviceid, 4693 devid, NFSX_V4DEVICEID); 4694 devid += NFSX_V4DEVICEID; 4695 } 4696 if (dvpp != NULL) 4697 *tdvpp++ = dvp; 4698 if (fhp != NULL) 4699 NFSBCOPY(&pf->dsf_fh, fhp++, 4700 NFSX_MYFH); 4701 if (fnamep != NULL && gotone == 1) 4702 strlcpy(fnamep, 4703 pf->dsf_filename, 4704 sizeof(pf->dsf_filename)); 4705 } else 4706 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 4707 "err=%d\n", error); 4708 } 4709 } 4710 } 4711 if (error == 0 && gotone == 0) 4712 error = ENOENT; 4713 4714 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 4715 error); 4716 if (error == 0) 4717 *mirrorcntp = gotone; 4718 else { 4719 if (gotone > 0 && dvpp != NULL) { 4720 /* 4721 * If the error didn't occur on the first one and 4722 * dvpp != NULL, the one(s) prior to the failure will 4723 * have locked dvp's that need to be unlocked. 4724 */ 4725 for (i = 0; i < gotone; i++) { 4726 NFSVOPUNLOCK(*dvpp, 0); 4727 *dvpp++ = NULL; 4728 } 4729 } 4730 /* 4731 * If it found the vnode to be copied from before a failure, 4732 * it needs to be vput()'d. 4733 */ 4734 if (nvpp != NULL && *nvpp != NULL) { 4735 vput(*nvpp); 4736 *nvpp = NULL; 4737 } 4738 } 4739 return (error); 4740 } 4741 4742 /* 4743 * Set the extended attribute for the Change attribute. 4744 */ 4745 static int 4746 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4747 { 4748 struct pnfsdsattr dsattr; 4749 int error; 4750 4751 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 4752 dsattr.dsa_filerev = nap->na_filerev; 4753 dsattr.dsa_size = nap->na_size; 4754 dsattr.dsa_atime = nap->na_atime; 4755 dsattr.dsa_mtime = nap->na_mtime; 4756 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4757 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 4758 if (error != 0) 4759 printf("pNFS: setextattr=%d\n", error); 4760 return (error); 4761 } 4762 4763 static int 4764 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 4765 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 4766 { 4767 uint32_t *tl; 4768 struct nfsrv_descript *nd; 4769 nfsv4stateid_t st; 4770 struct mbuf *m, *m2; 4771 int error = 0, retlen, tlen, trimlen; 4772 4773 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 4774 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4775 *mpp = NULL; 4776 /* 4777 * Use a stateid where other is an alternating 01010 pattern and 4778 * seqid is 0xffffffff. This value is not defined as special by 4779 * the RFC and is used by the FreeBSD NFS server to indicate an 4780 * MDS->DS proxy operation. 4781 */ 4782 st.other[0] = 0x55555555; 4783 st.other[1] = 0x55555555; 4784 st.other[2] = 0x55555555; 4785 st.seqid = 0xffffffff; 4786 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 4787 NULL, NULL, 0, 0); 4788 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4789 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 4790 txdr_hyper(off, tl); 4791 *(tl + 2) = txdr_unsigned(len); 4792 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 4793 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 4794 if (error != 0) { 4795 free(nd, M_TEMP); 4796 return (error); 4797 } 4798 if (nd->nd_repstat == 0) { 4799 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4800 NFSM_STRSIZ(retlen, len); 4801 if (retlen > 0) { 4802 /* Trim off the pre-data XDR from the mbuf chain. */ 4803 m = nd->nd_mrep; 4804 while (m != NULL && m != nd->nd_md) { 4805 if (m->m_next == nd->nd_md) { 4806 m->m_next = NULL; 4807 m_freem(nd->nd_mrep); 4808 nd->nd_mrep = m = nd->nd_md; 4809 } else 4810 m = m->m_next; 4811 } 4812 if (m == NULL) { 4813 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4814 error = ENOENT; 4815 goto nfsmout; 4816 } 4817 4818 /* 4819 * Now, adjust first mbuf so that any XDR before the 4820 * read data is skipped over. 4821 */ 4822 trimlen = nd->nd_dpos - mtod(m, char *); 4823 if (trimlen > 0) { 4824 m->m_len -= trimlen; 4825 NFSM_DATAP(m, trimlen); 4826 } 4827 4828 /* 4829 * Truncate the mbuf chain at retlen bytes of data, 4830 * plus XDR padding that brings the length up to a 4831 * multiple of 4. 4832 */ 4833 tlen = NFSM_RNDUP(retlen); 4834 do { 4835 if (m->m_len >= tlen) { 4836 m->m_len = tlen; 4837 tlen = 0; 4838 m2 = m->m_next; 4839 m->m_next = NULL; 4840 m_freem(m2); 4841 break; 4842 } 4843 tlen -= m->m_len; 4844 m = m->m_next; 4845 } while (m != NULL); 4846 if (tlen > 0) { 4847 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4848 error = ENOENT; 4849 goto nfsmout; 4850 } 4851 *mpp = nd->nd_mrep; 4852 *mpendp = m; 4853 nd->nd_mrep = NULL; 4854 } 4855 } else 4856 error = nd->nd_repstat; 4857 nfsmout: 4858 /* If nd->nd_mrep is already NULL, this is a no-op. */ 4859 m_freem(nd->nd_mrep); 4860 free(nd, M_TEMP); 4861 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 4862 return (error); 4863 } 4864 4865 /* 4866 * Do a write RPC on a DS data file, using this structure for the arguments, 4867 * so that this function can be executed by a separate kernel process. 4868 */ 4869 struct nfsrvwritedsdorpc { 4870 int done; 4871 int inprog; 4872 struct task tsk; 4873 fhandle_t fh; 4874 off_t off; 4875 int len; 4876 struct nfsmount *nmp; 4877 struct ucred *cred; 4878 NFSPROC_T *p; 4879 struct mbuf *m; 4880 int err; 4881 }; 4882 4883 static int 4884 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 4885 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 4886 { 4887 uint32_t *tl; 4888 struct nfsrv_descript *nd; 4889 nfsattrbit_t attrbits; 4890 nfsv4stateid_t st; 4891 int commit, error, retlen; 4892 4893 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4894 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 4895 sizeof(fhandle_t), NULL, NULL, 0, 0); 4896 4897 /* 4898 * Use a stateid where other is an alternating 01010 pattern and 4899 * seqid is 0xffffffff. This value is not defined as special by 4900 * the RFC and is used by the FreeBSD NFS server to indicate an 4901 * MDS->DS proxy operation. 4902 */ 4903 st.other[0] = 0x55555555; 4904 st.other[1] = 0x55555555; 4905 st.other[2] = 0x55555555; 4906 st.seqid = 0xffffffff; 4907 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4908 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 4909 txdr_hyper(off, tl); 4910 tl += 2; 4911 /* 4912 * Do all writes FileSync, since the server doesn't hold onto dirty 4913 * buffers. Since clients should be accessing the DS servers directly 4914 * using the pNFS layouts, this just needs to work correctly as a 4915 * fallback. 4916 */ 4917 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 4918 *tl = txdr_unsigned(len); 4919 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 4920 4921 /* Put data in mbuf chain. */ 4922 nd->nd_mb->m_next = m; 4923 4924 /* Set nd_mb and nd_bpos to end of data. */ 4925 while (m->m_next != NULL) 4926 m = m->m_next; 4927 nd->nd_mb = m; 4928 nd->nd_bpos = mtod(m, char *) + m->m_len; 4929 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 4930 4931 /* Do a Getattr for Size, Change and Modify Time. */ 4932 NFSZERO_ATTRBIT(&attrbits); 4933 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 4934 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 4935 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 4936 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 4937 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4938 *tl = txdr_unsigned(NFSV4OP_GETATTR); 4939 (void) nfsrv_putattrbit(nd, &attrbits); 4940 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 4941 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 4942 if (error != 0) { 4943 free(nd, M_TEMP); 4944 return (error); 4945 } 4946 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 4947 /* Get rid of weak cache consistency data for now. */ 4948 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 4949 (ND_NFSV4 | ND_V4WCCATTR)) { 4950 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 4951 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 4952 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 4953 if (error != 0) 4954 goto nfsmout; 4955 /* 4956 * Get rid of Op# and status for next op. 4957 */ 4958 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 4959 if (*++tl != 0) 4960 nd->nd_flag |= ND_NOMOREDATA; 4961 } 4962 if (nd->nd_repstat == 0) { 4963 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 4964 retlen = fxdr_unsigned(int, *tl++); 4965 commit = fxdr_unsigned(int, *tl); 4966 if (commit != NFSWRITE_FILESYNC) 4967 error = NFSERR_IO; 4968 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 4969 retlen, commit, error); 4970 } else 4971 error = nd->nd_repstat; 4972 /* We have no use for the Write Verifier since we use FileSync. */ 4973 4974 /* 4975 * Get the Change, Size, Access Time and Modify Time attributes and set 4976 * on the Metadata file, so its attributes will be what the file's 4977 * would be if it had been written. 4978 */ 4979 if (error == 0) { 4980 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 4981 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 4982 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 4983 } 4984 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 4985 nfsmout: 4986 m_freem(nd->nd_mrep); 4987 free(nd, M_TEMP); 4988 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 4989 return (error); 4990 } 4991 4992 /* 4993 * Start up the thread that will execute nfsrv_writedsdorpc(). 4994 */ 4995 static void 4996 start_writedsdorpc(void *arg, int pending) 4997 { 4998 struct nfsrvwritedsdorpc *drpc; 4999 5000 drpc = (struct nfsrvwritedsdorpc *)arg; 5001 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5002 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5003 drpc->done = 1; 5004 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5005 } 5006 5007 static int 5008 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5009 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5010 struct mbuf **mpp, char *cp, int *failposp) 5011 { 5012 struct nfsrvwritedsdorpc *drpc, *tdrpc; 5013 struct nfsvattr na; 5014 struct mbuf *m; 5015 int error, i, offs, ret, timo; 5016 5017 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5018 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5019 drpc = NULL; 5020 if (mirrorcnt > 1) 5021 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5022 M_WAITOK); 5023 5024 /* Calculate offset in mbuf chain that data starts. */ 5025 offs = cp - mtod(*mpp, char *); 5026 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5027 5028 /* 5029 * Do the write RPC for every DS, using a separate kernel process 5030 * for every DS except the last one. 5031 */ 5032 error = 0; 5033 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5034 tdrpc->done = 0; 5035 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5036 tdrpc->off = off; 5037 tdrpc->len = len; 5038 tdrpc->nmp = *nmpp; 5039 tdrpc->cred = cred; 5040 tdrpc->p = p; 5041 tdrpc->inprog = 0; 5042 tdrpc->err = 0; 5043 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5044 ret = EIO; 5045 if (nfs_pnfsiothreads != 0) { 5046 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5047 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5048 ret); 5049 } 5050 if (ret != 0) { 5051 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5052 tdrpc->m, cred, p); 5053 if (nfsds_failerr(ret) && *failposp == -1) 5054 *failposp = i; 5055 else if (error == 0 && ret != 0) 5056 error = ret; 5057 } 5058 nmpp++; 5059 fhp++; 5060 } 5061 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5062 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5063 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5064 *failposp = mirrorcnt - 1; 5065 else if (error == 0 && ret != 0) 5066 error = ret; 5067 if (error == 0) 5068 error = nfsrv_setextattr(vp, &na, p); 5069 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5070 tdrpc = drpc; 5071 timo = hz / 50; /* Wait for 20msec. */ 5072 if (timo < 1) 5073 timo = 1; 5074 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5075 /* Wait for RPCs on separate threads to complete. */ 5076 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5077 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5078 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5079 *failposp = i; 5080 else if (error == 0 && tdrpc->err != 0) 5081 error = tdrpc->err; 5082 } 5083 free(drpc, M_TEMP); 5084 return (error); 5085 } 5086 5087 static int 5088 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5089 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5090 struct nfsvattr *dsnap) 5091 { 5092 uint32_t *tl; 5093 struct nfsrv_descript *nd; 5094 nfsv4stateid_t st; 5095 nfsattrbit_t attrbits; 5096 int error; 5097 5098 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5099 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5100 /* 5101 * Use a stateid where other is an alternating 01010 pattern and 5102 * seqid is 0xffffffff. This value is not defined as special by 5103 * the RFC and is used by the FreeBSD NFS server to indicate an 5104 * MDS->DS proxy operation. 5105 */ 5106 st.other[0] = 0x55555555; 5107 st.other[1] = 0x55555555; 5108 st.other[2] = 0x55555555; 5109 st.seqid = 0xffffffff; 5110 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5111 NULL, NULL, 0, 0); 5112 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5113 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5114 5115 /* Do a Getattr for Size, Change, Access Time and Modify Time. */ 5116 NFSZERO_ATTRBIT(&attrbits); 5117 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5118 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5119 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5120 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5121 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5122 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5123 (void) nfsrv_putattrbit(nd, &attrbits); 5124 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5125 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5126 if (error != 0) { 5127 free(nd, M_TEMP); 5128 return (error); 5129 } 5130 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5131 nd->nd_repstat); 5132 /* Get rid of weak cache consistency data for now. */ 5133 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5134 (ND_NFSV4 | ND_V4WCCATTR)) { 5135 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5136 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5137 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5138 if (error != 0) 5139 goto nfsmout; 5140 /* 5141 * Get rid of Op# and status for next op. 5142 */ 5143 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5144 if (*++tl != 0) 5145 nd->nd_flag |= ND_NOMOREDATA; 5146 } 5147 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5148 if (error != 0) 5149 goto nfsmout; 5150 if (nd->nd_repstat != 0) 5151 error = nd->nd_repstat; 5152 /* 5153 * Get the Change, Size, Access Time and Modify Time attributes and set 5154 * on the Metadata file, so its attributes will be what the file's 5155 * would be if it had been written. 5156 */ 5157 if (error == 0) { 5158 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5159 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5160 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5161 } 5162 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5163 nfsmout: 5164 m_freem(nd->nd_mrep); 5165 free(nd, M_TEMP); 5166 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5167 return (error); 5168 } 5169 5170 struct nfsrvsetattrdsdorpc { 5171 int done; 5172 int inprog; 5173 struct task tsk; 5174 fhandle_t fh; 5175 struct nfsmount *nmp; 5176 struct vnode *vp; 5177 struct ucred *cred; 5178 NFSPROC_T *p; 5179 struct nfsvattr na; 5180 struct nfsvattr dsna; 5181 int err; 5182 }; 5183 5184 /* 5185 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5186 */ 5187 static void 5188 start_setattrdsdorpc(void *arg, int pending) 5189 { 5190 struct nfsrvsetattrdsdorpc *drpc; 5191 5192 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5193 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5194 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5195 drpc->done = 1; 5196 } 5197 5198 static int 5199 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5200 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5201 struct nfsvattr *nap, int *failposp) 5202 { 5203 struct nfsrvsetattrdsdorpc *drpc, *tdrpc; 5204 struct nfsvattr na; 5205 int error, i, ret, timo; 5206 5207 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5208 drpc = NULL; 5209 if (mirrorcnt > 1) 5210 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5211 M_WAITOK); 5212 5213 /* 5214 * Do the setattr RPC for every DS, using a separate kernel process 5215 * for every DS except the last one. 5216 */ 5217 error = 0; 5218 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5219 tdrpc->done = 0; 5220 tdrpc->inprog = 0; 5221 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5222 tdrpc->nmp = *nmpp; 5223 tdrpc->vp = vp; 5224 tdrpc->cred = cred; 5225 tdrpc->p = p; 5226 tdrpc->na = *nap; 5227 tdrpc->err = 0; 5228 ret = EIO; 5229 if (nfs_pnfsiothreads != 0) { 5230 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 5231 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 5232 ret); 5233 } 5234 if (ret != 0) { 5235 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 5236 &na); 5237 if (nfsds_failerr(ret) && *failposp == -1) 5238 *failposp = i; 5239 else if (error == 0 && ret != 0) 5240 error = ret; 5241 } 5242 nmpp++; 5243 fhp++; 5244 } 5245 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 5246 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5247 *failposp = mirrorcnt - 1; 5248 else if (error == 0 && ret != 0) 5249 error = ret; 5250 if (error == 0) 5251 error = nfsrv_setextattr(vp, &na, p); 5252 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 5253 tdrpc = drpc; 5254 timo = hz / 50; /* Wait for 20msec. */ 5255 if (timo < 1) 5256 timo = 1; 5257 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5258 /* Wait for RPCs on separate threads to complete. */ 5259 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5260 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 5261 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5262 *failposp = i; 5263 else if (error == 0 && tdrpc->err != 0) 5264 error = tdrpc->err; 5265 } 5266 free(drpc, M_TEMP); 5267 return (error); 5268 } 5269 5270 /* 5271 * Do a Setattr of an NFSv4 ACL on the DS file. 5272 */ 5273 static int 5274 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5275 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 5276 { 5277 struct nfsrv_descript *nd; 5278 nfsv4stateid_t st; 5279 nfsattrbit_t attrbits; 5280 int error; 5281 5282 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 5283 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5284 /* 5285 * Use a stateid where other is an alternating 01010 pattern and 5286 * seqid is 0xffffffff. This value is not defined as special by 5287 * the RFC and is used by the FreeBSD NFS server to indicate an 5288 * MDS->DS proxy operation. 5289 */ 5290 st.other[0] = 0x55555555; 5291 st.other[1] = 0x55555555; 5292 st.other[2] = 0x55555555; 5293 st.seqid = 0xffffffff; 5294 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5295 NULL, NULL, 0, 0); 5296 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5297 NFSZERO_ATTRBIT(&attrbits); 5298 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 5299 /* 5300 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 5301 * so passing in the metadata "vp" will be ok, since it is of 5302 * the same type (VREG). 5303 */ 5304 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 5305 NULL, 0, 0, 0, 0, 0, NULL); 5306 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5307 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5308 if (error != 0) { 5309 free(nd, M_TEMP); 5310 return (error); 5311 } 5312 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 5313 nd->nd_repstat); 5314 error = nd->nd_repstat; 5315 m_freem(nd->nd_mrep); 5316 free(nd, M_TEMP); 5317 return (error); 5318 } 5319 5320 struct nfsrvsetacldsdorpc { 5321 int done; 5322 int inprog; 5323 struct task tsk; 5324 fhandle_t fh; 5325 struct nfsmount *nmp; 5326 struct vnode *vp; 5327 struct ucred *cred; 5328 NFSPROC_T *p; 5329 struct acl *aclp; 5330 int err; 5331 }; 5332 5333 /* 5334 * Start up the thread that will execute nfsrv_setacldsdorpc(). 5335 */ 5336 static void 5337 start_setacldsdorpc(void *arg, int pending) 5338 { 5339 struct nfsrvsetacldsdorpc *drpc; 5340 5341 drpc = (struct nfsrvsetacldsdorpc *)arg; 5342 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 5343 drpc->vp, drpc->nmp, drpc->aclp); 5344 drpc->done = 1; 5345 } 5346 5347 static int 5348 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5349 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 5350 int *failposp) 5351 { 5352 struct nfsrvsetacldsdorpc *drpc, *tdrpc; 5353 int error, i, ret, timo; 5354 5355 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 5356 drpc = NULL; 5357 if (mirrorcnt > 1) 5358 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5359 M_WAITOK); 5360 5361 /* 5362 * Do the setattr RPC for every DS, using a separate kernel process 5363 * for every DS except the last one. 5364 */ 5365 error = 0; 5366 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5367 tdrpc->done = 0; 5368 tdrpc->inprog = 0; 5369 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5370 tdrpc->nmp = *nmpp; 5371 tdrpc->vp = vp; 5372 tdrpc->cred = cred; 5373 tdrpc->p = p; 5374 tdrpc->aclp = aclp; 5375 tdrpc->err = 0; 5376 ret = EIO; 5377 if (nfs_pnfsiothreads != 0) { 5378 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 5379 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 5380 ret); 5381 } 5382 if (ret != 0) { 5383 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 5384 aclp); 5385 if (nfsds_failerr(ret) && *failposp == -1) 5386 *failposp = i; 5387 else if (error == 0 && ret != 0) 5388 error = ret; 5389 } 5390 nmpp++; 5391 fhp++; 5392 } 5393 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 5394 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5395 *failposp = mirrorcnt - 1; 5396 else if (error == 0 && ret != 0) 5397 error = ret; 5398 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 5399 tdrpc = drpc; 5400 timo = hz / 50; /* Wait for 20msec. */ 5401 if (timo < 1) 5402 timo = 1; 5403 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5404 /* Wait for RPCs on separate threads to complete. */ 5405 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5406 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 5407 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5408 *failposp = i; 5409 else if (error == 0 && tdrpc->err != 0) 5410 error = tdrpc->err; 5411 } 5412 free(drpc, M_TEMP); 5413 return (error); 5414 } 5415 5416 /* 5417 * Getattr call to the DS for the Modify, Size and Change attributes. 5418 */ 5419 static int 5420 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5421 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 5422 { 5423 struct nfsrv_descript *nd; 5424 int error; 5425 nfsattrbit_t attrbits; 5426 5427 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 5428 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5429 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 5430 sizeof(fhandle_t), NULL, NULL, 0, 0); 5431 NFSZERO_ATTRBIT(&attrbits); 5432 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5433 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5434 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5435 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5436 (void) nfsrv_putattrbit(nd, &attrbits); 5437 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5438 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5439 if (error != 0) { 5440 free(nd, M_TEMP); 5441 return (error); 5442 } 5443 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 5444 nd->nd_repstat); 5445 if (nd->nd_repstat == 0) { 5446 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 5447 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 5448 NULL, NULL); 5449 /* 5450 * We can only save the updated values in the extended 5451 * attribute if the vp is exclusively locked. 5452 * This should happen when any of the following operations 5453 * occur on the vnode: 5454 * Close, Delegreturn, LayoutCommit, LayoutReturn 5455 * As such, the updated extended attribute should get saved 5456 * before nfsrv_checkdsattr() returns 0 and allows the cached 5457 * attributes to be returned without calling this function. 5458 */ 5459 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 5460 error = nfsrv_setextattr(vp, nap, p); 5461 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 5462 error); 5463 } 5464 } else 5465 error = nd->nd_repstat; 5466 m_freem(nd->nd_mrep); 5467 free(nd, M_TEMP); 5468 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 5469 return (error); 5470 } 5471 5472 /* 5473 * Get the device id and file handle for a DS file. 5474 */ 5475 int 5476 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 5477 fhandle_t *fhp, char *devid) 5478 { 5479 int buflen, error; 5480 char *buf; 5481 5482 buflen = 1024; 5483 buf = malloc(buflen, M_TEMP, M_WAITOK); 5484 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 5485 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 5486 free(buf, M_TEMP); 5487 return (error); 5488 } 5489 5490 /* 5491 * Do a Lookup against the DS for the filename. 5492 */ 5493 static int 5494 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 5495 struct vnode **nvpp, NFSPROC_T *p) 5496 { 5497 struct nameidata named; 5498 struct ucred *tcred; 5499 char *bufp; 5500 u_long *hashp; 5501 struct vnode *nvp; 5502 int error; 5503 5504 tcred = newnfs_getcred(); 5505 named.ni_cnd.cn_nameiop = LOOKUP; 5506 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 5507 named.ni_cnd.cn_cred = tcred; 5508 named.ni_cnd.cn_thread = p; 5509 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 5510 nfsvno_setpathbuf(&named, &bufp, &hashp); 5511 named.ni_cnd.cn_nameptr = bufp; 5512 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 5513 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 5514 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 5515 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 5516 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 5517 NFSFREECRED(tcred); 5518 nfsvno_relpathbuf(&named); 5519 if (error == 0) 5520 *nvpp = nvp; 5521 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 5522 return (error); 5523 } 5524 5525 /* 5526 * Set the file handle to the correct one. 5527 */ 5528 static void 5529 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 5530 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 5531 { 5532 struct nfsnode *np; 5533 int ret; 5534 5535 np = VTONFS(nvp); 5536 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 5537 /* 5538 * We can only do a vn_set_extattr() if the vnode is exclusively 5539 * locked and vn_start_write() has been done. If devid != NULL or 5540 * fnamep != NULL or the vnode is shared locked, vn_start_write() 5541 * may not have been done. 5542 * If not done now, it will be done on a future call. 5543 */ 5544 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 5545 LK_EXCLUSIVE) 5546 ret = vn_extattr_set(vp, IO_NODELOCKED, 5547 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 5548 (char *)pf, p); 5549 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 5550 } 5551 5552 /* 5553 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 5554 * when the DS has failed. 5555 */ 5556 void 5557 nfsrv_killrpcs(struct nfsmount *nmp) 5558 { 5559 5560 /* 5561 * Call newnfs_nmcancelreqs() to cause 5562 * any RPCs in progress on the mount point to 5563 * fail. 5564 * This will cause any process waiting for an 5565 * RPC to complete while holding a vnode lock 5566 * on the mounted-on vnode (such as "df" or 5567 * a non-forced "umount") to fail. 5568 * This will unlock the mounted-on vnode so 5569 * a forced dismount can succeed. 5570 * The NFSMNTP_CANCELRPCS flag should be set when this function is 5571 * called. 5572 */ 5573 newnfs_nmcancelreqs(nmp); 5574 } 5575 5576 /* 5577 * Sum up the statfs info for each of the DSs, so that the client will 5578 * receive the total for all DSs. 5579 */ 5580 static int 5581 nfsrv_pnfsstatfs(struct statfs *sf) 5582 { 5583 struct statfs *tsf; 5584 struct nfsdevice *ds; 5585 struct vnode **dvpp, **tdvpp, *dvp; 5586 uint64_t tot; 5587 int cnt, error = 0, i; 5588 5589 if (nfsrv_devidcnt <= 0) 5590 return (ENXIO); 5591 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 5592 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 5593 5594 /* Get an array of the dvps for the DSs. */ 5595 tdvpp = dvpp; 5596 i = 0; 5597 NFSDDSLOCK(); 5598 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5599 if (ds->nfsdev_nmp != NULL) { 5600 if (++i > nfsrv_devidcnt) 5601 break; 5602 *tdvpp++ = ds->nfsdev_dvp; 5603 } 5604 } 5605 NFSDDSUNLOCK(); 5606 cnt = i; 5607 5608 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 5609 tdvpp = dvpp; 5610 for (i = 0; i < cnt && error == 0; i++) { 5611 dvp = *tdvpp++; 5612 error = VFS_STATFS(dvp->v_mount, tsf); 5613 if (error == 0) { 5614 if (sf->f_bsize == 0) { 5615 if (tsf->f_bsize > 0) 5616 sf->f_bsize = tsf->f_bsize; 5617 else 5618 sf->f_bsize = 8192; 5619 } 5620 if (tsf->f_blocks > 0) { 5621 if (sf->f_bsize != tsf->f_bsize) { 5622 tot = tsf->f_blocks * tsf->f_bsize; 5623 sf->f_blocks += (tot / sf->f_bsize); 5624 } else 5625 sf->f_blocks += tsf->f_blocks; 5626 } 5627 if (tsf->f_bfree > 0) { 5628 if (sf->f_bsize != tsf->f_bsize) { 5629 tot = tsf->f_bfree * tsf->f_bsize; 5630 sf->f_bfree += (tot / sf->f_bsize); 5631 } else 5632 sf->f_bfree += tsf->f_bfree; 5633 } 5634 if (tsf->f_bavail > 0) { 5635 if (sf->f_bsize != tsf->f_bsize) { 5636 tot = tsf->f_bavail * tsf->f_bsize; 5637 sf->f_bavail += (tot / sf->f_bsize); 5638 } else 5639 sf->f_bavail += tsf->f_bavail; 5640 } 5641 } 5642 } 5643 free(tsf, M_TEMP); 5644 free(dvpp, M_TEMP); 5645 return (error); 5646 } 5647 5648 /* 5649 * Set an NFSv4 acl. 5650 */ 5651 int 5652 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 5653 { 5654 int error; 5655 5656 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 5657 error = NFSERR_ATTRNOTSUPP; 5658 goto out; 5659 } 5660 /* 5661 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 5662 * Make sure it has enough room for that - splitting every entry 5663 * into two and appending "canonical six" entries at the end. 5664 * Cribbed out of kern/vfs_acl.c - Rick M. 5665 */ 5666 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 5667 error = NFSERR_ATTRNOTSUPP; 5668 goto out; 5669 } 5670 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 5671 if (error == 0) { 5672 error = nfsrv_dssetacl(vp, aclp, cred, p); 5673 if (error == ENOENT) 5674 error = 0; 5675 } 5676 5677 out: 5678 NFSEXITCODE(error); 5679 return (error); 5680 } 5681 5682 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 5683 5684 /* 5685 * Called once to initialize data structures... 5686 */ 5687 static int 5688 nfsd_modevent(module_t mod, int type, void *data) 5689 { 5690 int error = 0, i; 5691 static int loaded = 0; 5692 5693 switch (type) { 5694 case MOD_LOAD: 5695 if (loaded) 5696 goto out; 5697 newnfs_portinit(); 5698 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 5699 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 5700 MTX_DEF); 5701 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 5702 MTX_DEF); 5703 } 5704 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 5705 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 5706 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 5707 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 5708 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 5709 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 5710 nfsrvd_initcache(); 5711 nfsd_init(); 5712 NFSD_LOCK(); 5713 nfsrvd_init(0); 5714 NFSD_UNLOCK(); 5715 nfsd_mntinit(); 5716 #ifdef VV_DISABLEDELEG 5717 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 5718 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 5719 #endif 5720 nfsd_call_servertimer = nfsrv_servertimer; 5721 nfsd_call_nfsd = nfssvc_nfsd; 5722 loaded = 1; 5723 break; 5724 5725 case MOD_UNLOAD: 5726 if (newnfs_numnfsd != 0) { 5727 error = EBUSY; 5728 break; 5729 } 5730 5731 #ifdef VV_DISABLEDELEG 5732 vn_deleg_ops.vndeleg_recall = NULL; 5733 vn_deleg_ops.vndeleg_disable = NULL; 5734 #endif 5735 nfsd_call_servertimer = NULL; 5736 nfsd_call_nfsd = NULL; 5737 5738 /* Clean out all NFSv4 state. */ 5739 nfsrv_throwawayallstate(curthread); 5740 5741 /* Clean the NFS server reply cache */ 5742 nfsrvd_cleancache(); 5743 5744 /* Free up the krpc server pool. */ 5745 if (nfsrvd_pool != NULL) 5746 svcpool_destroy(nfsrvd_pool); 5747 5748 /* and get rid of the locks */ 5749 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 5750 mtx_destroy(&nfsrchash_table[i].mtx); 5751 mtx_destroy(&nfsrcahash_table[i].mtx); 5752 } 5753 mtx_destroy(&nfsrc_udpmtx); 5754 mtx_destroy(&nfs_v4root_mutex); 5755 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 5756 mtx_destroy(&nfsrv_dontlistlock_mtx); 5757 mtx_destroy(&nfsrv_recalllock_mtx); 5758 for (i = 0; i < nfsrv_sessionhashsize; i++) 5759 mtx_destroy(&nfssessionhash[i].mtx); 5760 if (nfslayouthash != NULL) { 5761 for (i = 0; i < nfsrv_layouthashsize; i++) 5762 mtx_destroy(&nfslayouthash[i].mtx); 5763 free(nfslayouthash, M_NFSDSESSION); 5764 } 5765 lockdestroy(&nfsv4root_mnt.mnt_explock); 5766 free(nfsclienthash, M_NFSDCLIENT); 5767 free(nfslockhash, M_NFSDLOCKFILE); 5768 free(nfssessionhash, M_NFSDSESSION); 5769 loaded = 0; 5770 break; 5771 default: 5772 error = EOPNOTSUPP; 5773 break; 5774 } 5775 5776 out: 5777 NFSEXITCODE(error); 5778 return (error); 5779 } 5780 static moduledata_t nfsd_mod = { 5781 "nfsd", 5782 nfsd_modevent, 5783 NULL, 5784 }; 5785 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 5786 5787 /* So that loader and kldload(2) can find us, wherever we are.. */ 5788 MODULE_VERSION(nfsd, 1); 5789 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 5790 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 5791 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 5792 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 5793 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 5794 5795