1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/capsicum.h> 40 #include <sys/extattr.h> 41 42 /* 43 * Functions that perform the vfs operations required by the routines in 44 * nfsd_serv.c. It is hoped that this change will make the server more 45 * portable. 46 */ 47 48 #include <fs/nfs/nfsport.h> 49 #include <sys/hash.h> 50 #include <sys/sysctl.h> 51 #include <nlm/nlm_prot.h> 52 #include <nlm/nlm.h> 53 54 FEATURE(nfsd, "NFSv4 server"); 55 56 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 57 extern int nfsrv_useacl; 58 extern int newnfs_numnfsd; 59 extern struct mount nfsv4root_mnt; 60 extern struct nfsrv_stablefirst nfsrv_stablefirst; 61 extern void (*nfsd_call_servertimer)(void); 62 extern SVCPOOL *nfsrvd_pool; 63 extern struct nfsv4lock nfsd_suspend_lock; 64 extern struct nfsclienthashhead *nfsclienthash; 65 extern struct nfslockhashhead *nfslockhash; 66 extern struct nfssessionhash *nfssessionhash; 67 extern int nfsrv_sessionhashsize; 68 extern struct nfsstatsv1 nfsstatsv1; 69 extern struct nfslayouthash *nfslayouthash; 70 extern int nfsrv_layouthashsize; 71 extern struct mtx nfsrv_dslock_mtx; 72 extern int nfs_pnfsiothreads; 73 extern struct nfsdontlisthead nfsrv_dontlisthead; 74 extern volatile int nfsrv_dontlistlen; 75 extern volatile int nfsrv_devidcnt; 76 extern int nfsrv_maxpnfsmirror; 77 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 78 NFSDLOCKMUTEX; 79 NFSSTATESPINLOCK; 80 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 81 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 82 struct mtx nfsrc_udpmtx; 83 struct mtx nfs_v4root_mutex; 84 struct mtx nfsrv_dontlistlock_mtx; 85 struct mtx nfsrv_recalllock_mtx; 86 struct nfsrvfh nfs_rootfh, nfs_pubfh; 87 int nfs_pubfhset = 0, nfs_rootfhset = 0; 88 struct proc *nfsd_master_proc = NULL; 89 int nfsd_debuglevel = 0; 90 static pid_t nfsd_master_pid = (pid_t)-1; 91 static char nfsd_master_comm[MAXCOMLEN + 1]; 92 static struct timeval nfsd_master_start; 93 static uint32_t nfsv4_sysid = 0; 94 static fhandle_t zerofh; 95 96 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 97 struct ucred *); 98 99 int nfsrv_enable_crossmntpt = 1; 100 static int nfs_commit_blks; 101 static int nfs_commit_miss; 102 extern int nfsrv_issuedelegs; 103 extern int nfsrv_dolocallocks; 104 extern int nfsd_enable_stringtouid; 105 extern struct nfsdevicehead nfsrv_devidhead; 106 107 static void nfsrv_pnfscreate(struct vnode *, struct vattr *, struct ucred *, 108 NFSPROC_T *); 109 static void nfsrv_pnfsremovesetup(struct vnode *, NFSPROC_T *, struct vnode **, 110 int *, char *, fhandle_t *); 111 static void nfsrv_pnfsremove(struct vnode **, int, char *, fhandle_t *, 112 NFSPROC_T *); 113 static int nfsrv_proxyds(struct nfsrv_descript *, struct vnode *, off_t, int, 114 struct ucred *, struct thread *, int, struct mbuf **, char *, 115 struct mbuf **, struct nfsvattr *, struct acl *); 116 static int nfsrv_setextattr(struct vnode *, struct nfsvattr *, NFSPROC_T *); 117 static int nfsrv_readdsrpc(fhandle_t *, off_t, int, struct ucred *, 118 NFSPROC_T *, struct nfsmount *, struct mbuf **, struct mbuf **); 119 static int nfsrv_writedsrpc(fhandle_t *, off_t, int, struct ucred *, 120 NFSPROC_T *, struct vnode *, struct nfsmount **, int, struct mbuf **, 121 char *, int *); 122 static int nfsrv_setacldsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 123 struct vnode *, struct nfsmount **, int, struct acl *, int *); 124 static int nfsrv_setattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 125 struct vnode *, struct nfsmount **, int, struct nfsvattr *, int *); 126 static int nfsrv_getattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 127 struct vnode *, struct nfsmount *, struct nfsvattr *); 128 static int nfsrv_putfhname(fhandle_t *, char *); 129 static int nfsrv_pnfslookupds(struct vnode *, struct vnode *, 130 struct pnfsdsfile *, struct vnode **, NFSPROC_T *); 131 static void nfsrv_pnfssetfh(struct vnode *, struct pnfsdsfile *, char *, char *, 132 struct vnode *, NFSPROC_T *); 133 static int nfsrv_dsremove(struct vnode *, char *, struct ucred *, NFSPROC_T *); 134 static int nfsrv_dssetacl(struct vnode *, struct acl *, struct ucred *, 135 NFSPROC_T *); 136 static int nfsrv_pnfsstatfs(struct statfs *, struct mount *); 137 138 int nfs_pnfsio(task_fn_t *, void *); 139 140 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "NFS server"); 141 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 142 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 143 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 144 0, ""); 145 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 146 0, ""); 147 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 148 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 149 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 150 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 151 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 152 0, "Debug level for NFS server"); 153 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 154 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 155 static int nfsrv_pnfsgetdsattr = 1; 156 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsgetdsattr, CTLFLAG_RW, 157 &nfsrv_pnfsgetdsattr, 0, "When set getattr gets DS attributes via RPC"); 158 159 /* 160 * nfsrv_dsdirsize can only be increased and only when the nfsd threads are 161 * not running. 162 * The dsN subdirectories for the increased values must have been created 163 * on all DS servers before this increase is done. 164 */ 165 u_int nfsrv_dsdirsize = 20; 166 static int 167 sysctl_dsdirsize(SYSCTL_HANDLER_ARGS) 168 { 169 int error, newdsdirsize; 170 171 newdsdirsize = nfsrv_dsdirsize; 172 error = sysctl_handle_int(oidp, &newdsdirsize, 0, req); 173 if (error != 0 || req->newptr == NULL) 174 return (error); 175 if (newdsdirsize <= nfsrv_dsdirsize || newdsdirsize > 10000 || 176 newnfs_numnfsd != 0) 177 return (EINVAL); 178 nfsrv_dsdirsize = newdsdirsize; 179 return (0); 180 } 181 SYSCTL_PROC(_vfs_nfsd, OID_AUTO, dsdirsize, CTLTYPE_UINT | CTLFLAG_RW, 0, 182 sizeof(nfsrv_dsdirsize), sysctl_dsdirsize, "IU", 183 "Number of dsN subdirs on the DS servers"); 184 185 #define MAX_REORDERED_RPC 16 186 #define NUM_HEURISTIC 1031 187 #define NHUSE_INIT 64 188 #define NHUSE_INC 16 189 #define NHUSE_MAX 2048 190 191 static struct nfsheur { 192 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 193 off_t nh_nextoff; /* next offset for sequential detection */ 194 int nh_use; /* use count for selection */ 195 int nh_seqcount; /* heuristic */ 196 } nfsheur[NUM_HEURISTIC]; 197 198 199 /* 200 * Heuristic to detect sequential operation. 201 */ 202 static struct nfsheur * 203 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 204 { 205 struct nfsheur *nh; 206 int hi, try; 207 208 /* Locate best candidate. */ 209 try = 32; 210 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 211 nh = &nfsheur[hi]; 212 while (try--) { 213 if (nfsheur[hi].nh_vp == vp) { 214 nh = &nfsheur[hi]; 215 break; 216 } 217 if (nfsheur[hi].nh_use > 0) 218 --nfsheur[hi].nh_use; 219 hi = (hi + 1) % NUM_HEURISTIC; 220 if (nfsheur[hi].nh_use < nh->nh_use) 221 nh = &nfsheur[hi]; 222 } 223 224 /* Initialize hint if this is a new file. */ 225 if (nh->nh_vp != vp) { 226 nh->nh_vp = vp; 227 nh->nh_nextoff = uio->uio_offset; 228 nh->nh_use = NHUSE_INIT; 229 if (uio->uio_offset == 0) 230 nh->nh_seqcount = 4; 231 else 232 nh->nh_seqcount = 1; 233 } 234 235 /* Calculate heuristic. */ 236 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 237 uio->uio_offset == nh->nh_nextoff) { 238 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 239 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 240 if (nh->nh_seqcount > IO_SEQMAX) 241 nh->nh_seqcount = IO_SEQMAX; 242 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 243 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 244 /* Probably a reordered RPC, leave seqcount alone. */ 245 } else if (nh->nh_seqcount > 1) { 246 nh->nh_seqcount /= 2; 247 } else { 248 nh->nh_seqcount = 0; 249 } 250 nh->nh_use += NHUSE_INC; 251 if (nh->nh_use > NHUSE_MAX) 252 nh->nh_use = NHUSE_MAX; 253 return (nh); 254 } 255 256 /* 257 * Get attributes into nfsvattr structure. 258 */ 259 int 260 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, 261 struct nfsrv_descript *nd, struct thread *p, int vpislocked, 262 nfsattrbit_t *attrbitp) 263 { 264 int error, gotattr, lockedit = 0; 265 struct nfsvattr na; 266 267 if (vpislocked == 0) { 268 /* 269 * When vpislocked == 0, the vnode is either exclusively 270 * locked by this thread or not locked by this thread. 271 * As such, shared lock it, if not exclusively locked. 272 */ 273 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 274 lockedit = 1; 275 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 276 } 277 } 278 279 /* 280 * Acquire the Change, Size and TimeModify attributes, as required. 281 * This needs to be done for regular files if: 282 * - non-NFSv4 RPCs or 283 * - when attrbitp == NULL or 284 * - an NFSv4 RPC with any of the above attributes in attrbitp. 285 * A return of 0 for nfsrv_proxyds() indicates that it has acquired 286 * these attributes. nfsrv_proxyds() will return an error if the 287 * server is not a pNFS one. 288 */ 289 gotattr = 0; 290 if (vp->v_type == VREG && nfsrv_devidcnt > 0 && (attrbitp == NULL || 291 (nd->nd_flag & ND_NFSV4) == 0 || 292 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_CHANGE) || 293 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) || 294 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESS) || 295 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFY))) { 296 error = nfsrv_proxyds(nd, vp, 0, 0, nd->nd_cred, p, 297 NFSPROC_GETATTR, NULL, NULL, NULL, &na, NULL); 298 if (error == 0) 299 gotattr = 1; 300 } 301 302 error = VOP_GETATTR(vp, &nvap->na_vattr, nd->nd_cred); 303 if (lockedit != 0) 304 NFSVOPUNLOCK(vp, 0); 305 306 /* 307 * If we got the Change, Size and Modify Time from the DS, 308 * replace them. 309 */ 310 if (gotattr != 0) { 311 nvap->na_atime = na.na_atime; 312 nvap->na_mtime = na.na_mtime; 313 nvap->na_filerev = na.na_filerev; 314 nvap->na_size = na.na_size; 315 } 316 NFSD_DEBUG(4, "nfsvno_getattr: gotattr=%d err=%d chg=%ju\n", gotattr, 317 error, (uintmax_t)na.na_filerev); 318 319 NFSEXITCODE(error); 320 return (error); 321 } 322 323 /* 324 * Get a file handle for a vnode. 325 */ 326 int 327 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 328 { 329 int error; 330 331 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 332 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 333 error = VOP_VPTOFH(vp, &fhp->fh_fid); 334 335 NFSEXITCODE(error); 336 return (error); 337 } 338 339 /* 340 * Perform access checking for vnodes obtained from file handles that would 341 * refer to files already opened by a Unix client. You cannot just use 342 * vn_writechk() and VOP_ACCESSX() for two reasons. 343 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 344 * case. 345 * 2 - The owner is to be given access irrespective of mode bits for some 346 * operations, so that processes that chmod after opening a file don't 347 * break. 348 */ 349 int 350 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 351 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 352 u_int32_t *supportedtypep) 353 { 354 struct vattr vattr; 355 int error = 0, getret = 0; 356 357 if (vpislocked == 0) { 358 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 359 error = EPERM; 360 goto out; 361 } 362 } 363 if (accmode & VWRITE) { 364 /* Just vn_writechk() changed to check rdonly */ 365 /* 366 * Disallow write attempts on read-only file systems; 367 * unless the file is a socket or a block or character 368 * device resident on the file system. 369 */ 370 if (NFSVNO_EXRDONLY(exp) || 371 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 372 switch (vp->v_type) { 373 case VREG: 374 case VDIR: 375 case VLNK: 376 error = EROFS; 377 default: 378 break; 379 } 380 } 381 /* 382 * If there's shared text associated with 383 * the inode, try to free it up once. If 384 * we fail, we can't allow writing. 385 */ 386 if (VOP_IS_TEXT(vp) && error == 0) 387 error = ETXTBSY; 388 } 389 if (error != 0) { 390 if (vpislocked == 0) 391 NFSVOPUNLOCK(vp, 0); 392 goto out; 393 } 394 395 /* 396 * Should the override still be applied when ACLs are enabled? 397 */ 398 error = VOP_ACCESSX(vp, accmode, cred, p); 399 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 400 /* 401 * Try again with VEXPLICIT_DENY, to see if the test for 402 * deletion is supported. 403 */ 404 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 405 if (error == 0) { 406 if (vp->v_type == VDIR) { 407 accmode &= ~(VDELETE | VDELETE_CHILD); 408 accmode |= VWRITE; 409 error = VOP_ACCESSX(vp, accmode, cred, p); 410 } else if (supportedtypep != NULL) { 411 *supportedtypep &= ~NFSACCESS_DELETE; 412 } 413 } 414 } 415 416 /* 417 * Allow certain operations for the owner (reads and writes 418 * on files that are already open). 419 */ 420 if (override != NFSACCCHK_NOOVERRIDE && 421 (error == EPERM || error == EACCES)) { 422 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 423 error = 0; 424 else if (override & NFSACCCHK_ALLOWOWNER) { 425 getret = VOP_GETATTR(vp, &vattr, cred); 426 if (getret == 0 && cred->cr_uid == vattr.va_uid) 427 error = 0; 428 } 429 } 430 if (vpislocked == 0) 431 NFSVOPUNLOCK(vp, 0); 432 433 out: 434 NFSEXITCODE(error); 435 return (error); 436 } 437 438 /* 439 * Set attribute(s) vnop. 440 */ 441 int 442 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 443 struct thread *p, struct nfsexstuff *exp) 444 { 445 u_quad_t savsize = 0; 446 int error, savedit; 447 448 /* 449 * If this is an exported file system and a pNFS service is running, 450 * don't VOP_SETATTR() of size for the MDS file system. 451 */ 452 savedit = 0; 453 error = 0; 454 if (vp->v_type == VREG && (vp->v_mount->mnt_flag & MNT_EXPORTED) != 0 && 455 nfsrv_devidcnt != 0 && nvap->na_vattr.va_size != VNOVAL && 456 nvap->na_vattr.va_size > 0) { 457 savsize = nvap->na_vattr.va_size; 458 nvap->na_vattr.va_size = VNOVAL; 459 if (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 460 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 461 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 462 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 463 nvap->na_vattr.va_mtime.tv_sec != VNOVAL) 464 savedit = 1; 465 else 466 savedit = 2; 467 } 468 if (savedit != 2) 469 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 470 if (savedit != 0) 471 nvap->na_vattr.va_size = savsize; 472 if (error == 0 && (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 473 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 474 nvap->na_vattr.va_size != VNOVAL || 475 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 476 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 477 nvap->na_vattr.va_mtime.tv_sec != VNOVAL)) { 478 /* For a pNFS server, set the attributes on the DS file. */ 479 error = nfsrv_proxyds(NULL, vp, 0, 0, cred, p, NFSPROC_SETATTR, 480 NULL, NULL, NULL, nvap, NULL); 481 if (error == ENOENT) 482 error = 0; 483 } 484 NFSEXITCODE(error); 485 return (error); 486 } 487 488 /* 489 * Set up nameidata for a lookup() call and do it. 490 */ 491 int 492 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 493 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 494 struct vnode **retdirp) 495 { 496 struct componentname *cnp = &ndp->ni_cnd; 497 int i; 498 struct iovec aiov; 499 struct uio auio; 500 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 501 int error = 0; 502 char *cp; 503 504 *retdirp = NULL; 505 cnp->cn_nameptr = cnp->cn_pnbuf; 506 ndp->ni_lcf = 0; 507 /* 508 * Extract and set starting directory. 509 */ 510 if (dp->v_type != VDIR) { 511 if (islocked) 512 vput(dp); 513 else 514 vrele(dp); 515 nfsvno_relpathbuf(ndp); 516 error = ENOTDIR; 517 goto out1; 518 } 519 if (islocked) 520 NFSVOPUNLOCK(dp, 0); 521 VREF(dp); 522 *retdirp = dp; 523 if (NFSVNO_EXRDONLY(exp)) 524 cnp->cn_flags |= RDONLY; 525 ndp->ni_segflg = UIO_SYSSPACE; 526 527 if (nd->nd_flag & ND_PUBLOOKUP) { 528 ndp->ni_loopcnt = 0; 529 if (cnp->cn_pnbuf[0] == '/') { 530 vrele(dp); 531 /* 532 * Check for degenerate pathnames here, since lookup() 533 * panics on them. 534 */ 535 for (i = 1; i < ndp->ni_pathlen; i++) 536 if (cnp->cn_pnbuf[i] != '/') 537 break; 538 if (i == ndp->ni_pathlen) { 539 error = NFSERR_ACCES; 540 goto out; 541 } 542 dp = rootvnode; 543 VREF(dp); 544 } 545 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 546 (nd->nd_flag & ND_NFSV4) == 0) { 547 /* 548 * Only cross mount points for NFSv4 when doing a 549 * mount while traversing the file system above 550 * the mount point, unless nfsrv_enable_crossmntpt is set. 551 */ 552 cnp->cn_flags |= NOCROSSMOUNT; 553 } 554 555 /* 556 * Initialize for scan, set ni_startdir and bump ref on dp again 557 * because lookup() will dereference ni_startdir. 558 */ 559 560 cnp->cn_thread = p; 561 ndp->ni_startdir = dp; 562 ndp->ni_rootdir = rootvnode; 563 ndp->ni_topdir = NULL; 564 565 if (!lockleaf) 566 cnp->cn_flags |= LOCKLEAF; 567 for (;;) { 568 cnp->cn_nameptr = cnp->cn_pnbuf; 569 /* 570 * Call lookup() to do the real work. If an error occurs, 571 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 572 * we do not have to dereference anything before returning. 573 * In either case ni_startdir will be dereferenced and NULLed 574 * out. 575 */ 576 error = lookup(ndp); 577 if (error) 578 break; 579 580 /* 581 * Check for encountering a symbolic link. Trivial 582 * termination occurs if no symlink encountered. 583 */ 584 if ((cnp->cn_flags & ISSYMLINK) == 0) { 585 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 586 nfsvno_relpathbuf(ndp); 587 if (ndp->ni_vp && !lockleaf) 588 NFSVOPUNLOCK(ndp->ni_vp, 0); 589 break; 590 } 591 592 /* 593 * Validate symlink 594 */ 595 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 596 NFSVOPUNLOCK(ndp->ni_dvp, 0); 597 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 598 error = EINVAL; 599 goto badlink2; 600 } 601 602 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 603 error = ELOOP; 604 goto badlink2; 605 } 606 if (ndp->ni_pathlen > 1) 607 cp = uma_zalloc(namei_zone, M_WAITOK); 608 else 609 cp = cnp->cn_pnbuf; 610 aiov.iov_base = cp; 611 aiov.iov_len = MAXPATHLEN; 612 auio.uio_iov = &aiov; 613 auio.uio_iovcnt = 1; 614 auio.uio_offset = 0; 615 auio.uio_rw = UIO_READ; 616 auio.uio_segflg = UIO_SYSSPACE; 617 auio.uio_td = NULL; 618 auio.uio_resid = MAXPATHLEN; 619 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 620 if (error) { 621 badlink1: 622 if (ndp->ni_pathlen > 1) 623 uma_zfree(namei_zone, cp); 624 badlink2: 625 vrele(ndp->ni_dvp); 626 vput(ndp->ni_vp); 627 break; 628 } 629 linklen = MAXPATHLEN - auio.uio_resid; 630 if (linklen == 0) { 631 error = ENOENT; 632 goto badlink1; 633 } 634 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 635 error = ENAMETOOLONG; 636 goto badlink1; 637 } 638 639 /* 640 * Adjust or replace path 641 */ 642 if (ndp->ni_pathlen > 1) { 643 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 644 uma_zfree(namei_zone, cnp->cn_pnbuf); 645 cnp->cn_pnbuf = cp; 646 } else 647 cnp->cn_pnbuf[linklen] = '\0'; 648 ndp->ni_pathlen += linklen; 649 650 /* 651 * Cleanup refs for next loop and check if root directory 652 * should replace current directory. Normally ni_dvp 653 * becomes the new base directory and is cleaned up when 654 * we loop. Explicitly null pointers after invalidation 655 * to clarify operation. 656 */ 657 vput(ndp->ni_vp); 658 ndp->ni_vp = NULL; 659 660 if (cnp->cn_pnbuf[0] == '/') { 661 vrele(ndp->ni_dvp); 662 ndp->ni_dvp = ndp->ni_rootdir; 663 VREF(ndp->ni_dvp); 664 } 665 ndp->ni_startdir = ndp->ni_dvp; 666 ndp->ni_dvp = NULL; 667 } 668 if (!lockleaf) 669 cnp->cn_flags &= ~LOCKLEAF; 670 671 out: 672 if (error) { 673 nfsvno_relpathbuf(ndp); 674 ndp->ni_vp = NULL; 675 ndp->ni_dvp = NULL; 676 ndp->ni_startdir = NULL; 677 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 678 ndp->ni_dvp = NULL; 679 } 680 681 out1: 682 NFSEXITCODE2(error, nd); 683 return (error); 684 } 685 686 /* 687 * Set up a pathname buffer and return a pointer to it and, optionally 688 * set a hash pointer. 689 */ 690 void 691 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 692 { 693 struct componentname *cnp = &ndp->ni_cnd; 694 695 cnp->cn_flags |= (NOMACCHECK | HASBUF); 696 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 697 if (hashpp != NULL) 698 *hashpp = NULL; 699 *bufpp = cnp->cn_pnbuf; 700 } 701 702 /* 703 * Release the above path buffer, if not released by nfsvno_namei(). 704 */ 705 void 706 nfsvno_relpathbuf(struct nameidata *ndp) 707 { 708 709 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 710 panic("nfsrelpath"); 711 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 712 ndp->ni_cnd.cn_flags &= ~HASBUF; 713 } 714 715 /* 716 * Readlink vnode op into an mbuf list. 717 */ 718 int 719 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 720 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 721 { 722 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 723 struct iovec *ivp = iv; 724 struct uio io, *uiop = &io; 725 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 726 int i, len, tlen, error = 0; 727 728 len = 0; 729 i = 0; 730 while (len < NFS_MAXPATHLEN) { 731 NFSMGET(mp); 732 MCLGET(mp, M_WAITOK); 733 mp->m_len = M_SIZE(mp); 734 if (len == 0) { 735 mp3 = mp2 = mp; 736 } else { 737 mp2->m_next = mp; 738 mp2 = mp; 739 } 740 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 741 mp->m_len = NFS_MAXPATHLEN - len; 742 len = NFS_MAXPATHLEN; 743 } else { 744 len += mp->m_len; 745 } 746 ivp->iov_base = mtod(mp, caddr_t); 747 ivp->iov_len = mp->m_len; 748 i++; 749 ivp++; 750 } 751 uiop->uio_iov = iv; 752 uiop->uio_iovcnt = i; 753 uiop->uio_offset = 0; 754 uiop->uio_resid = len; 755 uiop->uio_rw = UIO_READ; 756 uiop->uio_segflg = UIO_SYSSPACE; 757 uiop->uio_td = NULL; 758 error = VOP_READLINK(vp, uiop, cred); 759 if (error) { 760 m_freem(mp3); 761 *lenp = 0; 762 goto out; 763 } 764 if (uiop->uio_resid > 0) { 765 len -= uiop->uio_resid; 766 tlen = NFSM_RNDUP(len); 767 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 768 } 769 *lenp = len; 770 *mpp = mp3; 771 *mpendp = mp; 772 773 out: 774 NFSEXITCODE(error); 775 return (error); 776 } 777 778 /* 779 * Read vnode op call into mbuf list. 780 */ 781 int 782 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 783 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 784 { 785 struct mbuf *m; 786 int i; 787 struct iovec *iv; 788 struct iovec *iv2; 789 int error = 0, len, left, siz, tlen, ioflag = 0; 790 struct mbuf *m2 = NULL, *m3; 791 struct uio io, *uiop = &io; 792 struct nfsheur *nh; 793 794 /* 795 * Attempt to read from a DS file. A return of ENOENT implies 796 * there is no DS file to read. 797 */ 798 error = nfsrv_proxyds(NULL, vp, off, cnt, cred, p, NFSPROC_READDS, mpp, 799 NULL, mpendp, NULL, NULL); 800 if (error != ENOENT) 801 return (error); 802 803 len = left = NFSM_RNDUP(cnt); 804 m3 = NULL; 805 /* 806 * Generate the mbuf list with the uio_iov ref. to it. 807 */ 808 i = 0; 809 while (left > 0) { 810 NFSMGET(m); 811 MCLGET(m, M_WAITOK); 812 m->m_len = 0; 813 siz = min(M_TRAILINGSPACE(m), left); 814 left -= siz; 815 i++; 816 if (m3) 817 m2->m_next = m; 818 else 819 m3 = m; 820 m2 = m; 821 } 822 iv = malloc(i * sizeof (struct iovec), 823 M_TEMP, M_WAITOK); 824 uiop->uio_iov = iv2 = iv; 825 m = m3; 826 left = len; 827 i = 0; 828 while (left > 0) { 829 if (m == NULL) 830 panic("nfsvno_read iov"); 831 siz = min(M_TRAILINGSPACE(m), left); 832 if (siz > 0) { 833 iv->iov_base = mtod(m, caddr_t) + m->m_len; 834 iv->iov_len = siz; 835 m->m_len += siz; 836 left -= siz; 837 iv++; 838 i++; 839 } 840 m = m->m_next; 841 } 842 uiop->uio_iovcnt = i; 843 uiop->uio_offset = off; 844 uiop->uio_resid = len; 845 uiop->uio_rw = UIO_READ; 846 uiop->uio_segflg = UIO_SYSSPACE; 847 uiop->uio_td = NULL; 848 nh = nfsrv_sequential_heuristic(uiop, vp); 849 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 850 /* XXX KDM make this more systematic? */ 851 nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid; 852 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 853 free(iv2, M_TEMP); 854 if (error) { 855 m_freem(m3); 856 *mpp = NULL; 857 goto out; 858 } 859 nh->nh_nextoff = uiop->uio_offset; 860 tlen = len - uiop->uio_resid; 861 cnt = cnt < tlen ? cnt : tlen; 862 tlen = NFSM_RNDUP(cnt); 863 if (tlen == 0) { 864 m_freem(m3); 865 m3 = NULL; 866 } else if (len != tlen || tlen != cnt) 867 nfsrv_adj(m3, len - tlen, tlen - cnt); 868 *mpp = m3; 869 *mpendp = m2; 870 871 out: 872 NFSEXITCODE(error); 873 return (error); 874 } 875 876 /* 877 * Write vnode op from an mbuf list. 878 */ 879 int 880 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int *stable, 881 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 882 { 883 struct iovec *ivp; 884 int i, len; 885 struct iovec *iv; 886 int ioflags, error; 887 struct uio io, *uiop = &io; 888 struct nfsheur *nh; 889 890 /* 891 * Attempt to write to a DS file. A return of ENOENT implies 892 * there is no DS file to write. 893 */ 894 error = nfsrv_proxyds(NULL, vp, off, retlen, cred, p, NFSPROC_WRITEDS, 895 &mp, cp, NULL, NULL, NULL); 896 if (error != ENOENT) { 897 *stable = NFSWRITE_FILESYNC; 898 return (error); 899 } 900 901 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, 902 M_WAITOK); 903 uiop->uio_iov = iv = ivp; 904 uiop->uio_iovcnt = cnt; 905 i = mtod(mp, caddr_t) + mp->m_len - cp; 906 len = retlen; 907 while (len > 0) { 908 if (mp == NULL) 909 panic("nfsvno_write"); 910 if (i > 0) { 911 i = min(i, len); 912 ivp->iov_base = cp; 913 ivp->iov_len = i; 914 ivp++; 915 len -= i; 916 } 917 mp = mp->m_next; 918 if (mp) { 919 i = mp->m_len; 920 cp = mtod(mp, caddr_t); 921 } 922 } 923 924 if (*stable == NFSWRITE_UNSTABLE) 925 ioflags = IO_NODELOCKED; 926 else 927 ioflags = (IO_SYNC | IO_NODELOCKED); 928 uiop->uio_resid = retlen; 929 uiop->uio_rw = UIO_WRITE; 930 uiop->uio_segflg = UIO_SYSSPACE; 931 NFSUIOPROC(uiop, p); 932 uiop->uio_offset = off; 933 nh = nfsrv_sequential_heuristic(uiop, vp); 934 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 935 /* XXX KDM make this more systematic? */ 936 nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid; 937 error = VOP_WRITE(vp, uiop, ioflags, cred); 938 if (error == 0) 939 nh->nh_nextoff = uiop->uio_offset; 940 free(iv, M_TEMP); 941 942 NFSEXITCODE(error); 943 return (error); 944 } 945 946 /* 947 * Common code for creating a regular file (plus special files for V2). 948 */ 949 int 950 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 951 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 952 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp) 953 { 954 u_quad_t tempsize; 955 int error; 956 957 error = nd->nd_repstat; 958 if (!error && ndp->ni_vp == NULL) { 959 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 960 vrele(ndp->ni_startdir); 961 error = VOP_CREATE(ndp->ni_dvp, 962 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 963 /* For a pNFS server, create the data file on a DS. */ 964 if (error == 0 && nvap->na_type == VREG) { 965 /* 966 * Create a data file on a DS for a pNFS server. 967 * This function just returns if not 968 * running a pNFS DS or the creation fails. 969 */ 970 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 971 nd->nd_cred, p); 972 } 973 vput(ndp->ni_dvp); 974 nfsvno_relpathbuf(ndp); 975 if (!error) { 976 if (*exclusive_flagp) { 977 *exclusive_flagp = 0; 978 NFSVNO_ATTRINIT(nvap); 979 nvap->na_atime.tv_sec = cverf[0]; 980 nvap->na_atime.tv_nsec = cverf[1]; 981 error = VOP_SETATTR(ndp->ni_vp, 982 &nvap->na_vattr, nd->nd_cred); 983 if (error != 0) { 984 vput(ndp->ni_vp); 985 ndp->ni_vp = NULL; 986 error = NFSERR_NOTSUPP; 987 } 988 } 989 } 990 /* 991 * NFS V2 Only. nfsrvd_mknod() does this for V3. 992 * (This implies, just get out on an error.) 993 */ 994 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 995 nvap->na_type == VFIFO) { 996 if (nvap->na_type == VCHR && rdev == 0xffffffff) 997 nvap->na_type = VFIFO; 998 if (nvap->na_type != VFIFO && 999 (error = priv_check_cred(nd->nd_cred, 1000 PRIV_VFS_MKNOD_DEV, 0))) { 1001 vrele(ndp->ni_startdir); 1002 nfsvno_relpathbuf(ndp); 1003 vput(ndp->ni_dvp); 1004 goto out; 1005 } 1006 nvap->na_rdev = rdev; 1007 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1008 &ndp->ni_cnd, &nvap->na_vattr); 1009 vput(ndp->ni_dvp); 1010 nfsvno_relpathbuf(ndp); 1011 vrele(ndp->ni_startdir); 1012 if (error) 1013 goto out; 1014 } else { 1015 vrele(ndp->ni_startdir); 1016 nfsvno_relpathbuf(ndp); 1017 vput(ndp->ni_dvp); 1018 error = ENXIO; 1019 goto out; 1020 } 1021 *vpp = ndp->ni_vp; 1022 } else { 1023 /* 1024 * Handle cases where error is already set and/or 1025 * the file exists. 1026 * 1 - clean up the lookup 1027 * 2 - iff !error and na_size set, truncate it 1028 */ 1029 vrele(ndp->ni_startdir); 1030 nfsvno_relpathbuf(ndp); 1031 *vpp = ndp->ni_vp; 1032 if (ndp->ni_dvp == *vpp) 1033 vrele(ndp->ni_dvp); 1034 else 1035 vput(ndp->ni_dvp); 1036 if (!error && nvap->na_size != VNOVAL) { 1037 error = nfsvno_accchk(*vpp, VWRITE, 1038 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1039 NFSACCCHK_VPISLOCKED, NULL); 1040 if (!error) { 1041 tempsize = nvap->na_size; 1042 NFSVNO_ATTRINIT(nvap); 1043 nvap->na_size = tempsize; 1044 error = VOP_SETATTR(*vpp, 1045 &nvap->na_vattr, nd->nd_cred); 1046 } 1047 } 1048 if (error) 1049 vput(*vpp); 1050 } 1051 1052 out: 1053 NFSEXITCODE(error); 1054 return (error); 1055 } 1056 1057 /* 1058 * Do a mknod vnode op. 1059 */ 1060 int 1061 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 1062 struct thread *p) 1063 { 1064 int error = 0; 1065 enum vtype vtyp; 1066 1067 vtyp = nvap->na_type; 1068 /* 1069 * Iff doesn't exist, create it. 1070 */ 1071 if (ndp->ni_vp) { 1072 vrele(ndp->ni_startdir); 1073 nfsvno_relpathbuf(ndp); 1074 vput(ndp->ni_dvp); 1075 vrele(ndp->ni_vp); 1076 error = EEXIST; 1077 goto out; 1078 } 1079 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1080 vrele(ndp->ni_startdir); 1081 nfsvno_relpathbuf(ndp); 1082 vput(ndp->ni_dvp); 1083 error = NFSERR_BADTYPE; 1084 goto out; 1085 } 1086 if (vtyp == VSOCK) { 1087 vrele(ndp->ni_startdir); 1088 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 1089 &ndp->ni_cnd, &nvap->na_vattr); 1090 vput(ndp->ni_dvp); 1091 nfsvno_relpathbuf(ndp); 1092 } else { 1093 if (nvap->na_type != VFIFO && 1094 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) { 1095 vrele(ndp->ni_startdir); 1096 nfsvno_relpathbuf(ndp); 1097 vput(ndp->ni_dvp); 1098 goto out; 1099 } 1100 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1101 &ndp->ni_cnd, &nvap->na_vattr); 1102 vput(ndp->ni_dvp); 1103 nfsvno_relpathbuf(ndp); 1104 vrele(ndp->ni_startdir); 1105 /* 1106 * Since VOP_MKNOD returns the ni_vp, I can't 1107 * see any reason to do the lookup. 1108 */ 1109 } 1110 1111 out: 1112 NFSEXITCODE(error); 1113 return (error); 1114 } 1115 1116 /* 1117 * Mkdir vnode op. 1118 */ 1119 int 1120 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 1121 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 1122 { 1123 int error = 0; 1124 1125 if (ndp->ni_vp != NULL) { 1126 if (ndp->ni_dvp == ndp->ni_vp) 1127 vrele(ndp->ni_dvp); 1128 else 1129 vput(ndp->ni_dvp); 1130 vrele(ndp->ni_vp); 1131 nfsvno_relpathbuf(ndp); 1132 error = EEXIST; 1133 goto out; 1134 } 1135 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1136 &nvap->na_vattr); 1137 vput(ndp->ni_dvp); 1138 nfsvno_relpathbuf(ndp); 1139 1140 out: 1141 NFSEXITCODE(error); 1142 return (error); 1143 } 1144 1145 /* 1146 * symlink vnode op. 1147 */ 1148 int 1149 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 1150 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 1151 struct nfsexstuff *exp) 1152 { 1153 int error = 0; 1154 1155 if (ndp->ni_vp) { 1156 vrele(ndp->ni_startdir); 1157 nfsvno_relpathbuf(ndp); 1158 if (ndp->ni_dvp == ndp->ni_vp) 1159 vrele(ndp->ni_dvp); 1160 else 1161 vput(ndp->ni_dvp); 1162 vrele(ndp->ni_vp); 1163 error = EEXIST; 1164 goto out; 1165 } 1166 1167 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1168 &nvap->na_vattr, pathcp); 1169 vput(ndp->ni_dvp); 1170 vrele(ndp->ni_startdir); 1171 nfsvno_relpathbuf(ndp); 1172 /* 1173 * Although FreeBSD still had the lookup code in 1174 * it for 7/current, there doesn't seem to be any 1175 * point, since VOP_SYMLINK() returns the ni_vp. 1176 * Just vput it for v2. 1177 */ 1178 if (!not_v2 && !error) 1179 vput(ndp->ni_vp); 1180 1181 out: 1182 NFSEXITCODE(error); 1183 return (error); 1184 } 1185 1186 /* 1187 * Parse symbolic link arguments. 1188 * This function has an ugly side effect. It will malloc() an area for 1189 * the symlink and set iov_base to point to it, only if it succeeds. 1190 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1191 * be FREE'd later. 1192 */ 1193 int 1194 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1195 struct thread *p, char **pathcpp, int *lenp) 1196 { 1197 u_int32_t *tl; 1198 char *pathcp = NULL; 1199 int error = 0, len; 1200 struct nfsv2_sattr *sp; 1201 1202 *pathcpp = NULL; 1203 *lenp = 0; 1204 if ((nd->nd_flag & ND_NFSV3) && 1205 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1206 goto nfsmout; 1207 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1208 len = fxdr_unsigned(int, *tl); 1209 if (len > NFS_MAXPATHLEN || len <= 0) { 1210 error = EBADRPC; 1211 goto nfsmout; 1212 } 1213 pathcp = malloc(len + 1, M_TEMP, M_WAITOK); 1214 error = nfsrv_mtostr(nd, pathcp, len); 1215 if (error) 1216 goto nfsmout; 1217 if (nd->nd_flag & ND_NFSV2) { 1218 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1219 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1220 } 1221 *pathcpp = pathcp; 1222 *lenp = len; 1223 NFSEXITCODE2(0, nd); 1224 return (0); 1225 nfsmout: 1226 if (pathcp) 1227 free(pathcp, M_TEMP); 1228 NFSEXITCODE2(error, nd); 1229 return (error); 1230 } 1231 1232 /* 1233 * Remove a non-directory object. 1234 */ 1235 int 1236 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1237 struct thread *p, struct nfsexstuff *exp) 1238 { 1239 struct vnode *vp, *dsdvp[NFSDEV_MAXMIRRORS]; 1240 int error = 0, mirrorcnt; 1241 char fname[PNFS_FILENAME_LEN + 1]; 1242 fhandle_t fh; 1243 1244 vp = ndp->ni_vp; 1245 dsdvp[0] = NULL; 1246 if (vp->v_type == VDIR) 1247 error = NFSERR_ISDIR; 1248 else if (is_v4) 1249 error = nfsrv_checkremove(vp, 1, p); 1250 if (error == 0) 1251 nfsrv_pnfsremovesetup(vp, p, dsdvp, &mirrorcnt, fname, &fh); 1252 if (!error) 1253 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1254 if (error == 0 && dsdvp[0] != NULL) 1255 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1256 if (ndp->ni_dvp == vp) 1257 vrele(ndp->ni_dvp); 1258 else 1259 vput(ndp->ni_dvp); 1260 vput(vp); 1261 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1262 nfsvno_relpathbuf(ndp); 1263 NFSEXITCODE(error); 1264 return (error); 1265 } 1266 1267 /* 1268 * Remove a directory. 1269 */ 1270 int 1271 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1272 struct thread *p, struct nfsexstuff *exp) 1273 { 1274 struct vnode *vp; 1275 int error = 0; 1276 1277 vp = ndp->ni_vp; 1278 if (vp->v_type != VDIR) { 1279 error = ENOTDIR; 1280 goto out; 1281 } 1282 /* 1283 * No rmdir "." please. 1284 */ 1285 if (ndp->ni_dvp == vp) { 1286 error = EINVAL; 1287 goto out; 1288 } 1289 /* 1290 * The root of a mounted filesystem cannot be deleted. 1291 */ 1292 if (vp->v_vflag & VV_ROOT) 1293 error = EBUSY; 1294 out: 1295 if (!error) 1296 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1297 if (ndp->ni_dvp == vp) 1298 vrele(ndp->ni_dvp); 1299 else 1300 vput(ndp->ni_dvp); 1301 vput(vp); 1302 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1303 nfsvno_relpathbuf(ndp); 1304 NFSEXITCODE(error); 1305 return (error); 1306 } 1307 1308 /* 1309 * Rename vnode op. 1310 */ 1311 int 1312 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1313 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1314 { 1315 struct vnode *fvp, *tvp, *tdvp, *dsdvp[NFSDEV_MAXMIRRORS]; 1316 int error = 0, mirrorcnt; 1317 char fname[PNFS_FILENAME_LEN + 1]; 1318 fhandle_t fh; 1319 1320 dsdvp[0] = NULL; 1321 fvp = fromndp->ni_vp; 1322 if (ndstat) { 1323 vrele(fromndp->ni_dvp); 1324 vrele(fvp); 1325 error = ndstat; 1326 goto out1; 1327 } 1328 tdvp = tondp->ni_dvp; 1329 tvp = tondp->ni_vp; 1330 if (tvp != NULL) { 1331 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1332 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1333 goto out; 1334 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1335 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1336 goto out; 1337 } 1338 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1339 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1340 goto out; 1341 } 1342 1343 /* 1344 * A rename to '.' or '..' results in a prematurely 1345 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1346 * here. 1347 */ 1348 if ((tondp->ni_cnd.cn_namelen == 1 && 1349 tondp->ni_cnd.cn_nameptr[0] == '.') || 1350 (tondp->ni_cnd.cn_namelen == 2 && 1351 tondp->ni_cnd.cn_nameptr[0] == '.' && 1352 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1353 error = EINVAL; 1354 goto out; 1355 } 1356 } 1357 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1358 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1359 goto out; 1360 } 1361 if (fvp->v_mount != tdvp->v_mount) { 1362 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1363 goto out; 1364 } 1365 if (fvp == tdvp) { 1366 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1367 goto out; 1368 } 1369 if (fvp == tvp) { 1370 /* 1371 * If source and destination are the same, there is nothing to 1372 * do. Set error to -1 to indicate this. 1373 */ 1374 error = -1; 1375 goto out; 1376 } 1377 if (ndflag & ND_NFSV4) { 1378 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1379 error = nfsrv_checkremove(fvp, 0, p); 1380 NFSVOPUNLOCK(fvp, 0); 1381 } else 1382 error = EPERM; 1383 if (tvp && !error) 1384 error = nfsrv_checkremove(tvp, 1, p); 1385 } else { 1386 /* 1387 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1388 * that the NFSv4 client won't be confused by the rename. 1389 * Since nfsd_recalldelegation() can only be called on an 1390 * unlocked vnode at this point and fvp is the file that will 1391 * still exist after the rename, just do fvp. 1392 */ 1393 nfsd_recalldelegation(fvp, p); 1394 } 1395 if (error == 0 && tvp != NULL) { 1396 nfsrv_pnfsremovesetup(tvp, p, dsdvp, &mirrorcnt, fname, &fh); 1397 NFSD_DEBUG(4, "nfsvno_rename: pnfsremovesetup" 1398 " dsdvp=%p\n", dsdvp[0]); 1399 } 1400 out: 1401 if (!error) { 1402 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1403 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1404 &tondp->ni_cnd); 1405 } else { 1406 if (tdvp == tvp) 1407 vrele(tdvp); 1408 else 1409 vput(tdvp); 1410 if (tvp) 1411 vput(tvp); 1412 vrele(fromndp->ni_dvp); 1413 vrele(fvp); 1414 if (error == -1) 1415 error = 0; 1416 } 1417 1418 /* 1419 * If dsdvp[0] != NULL, it was set up by nfsrv_pnfsremovesetup() and 1420 * if the rename succeeded, the DS file for the tvp needs to be 1421 * removed. 1422 */ 1423 if (error == 0 && dsdvp[0] != NULL) { 1424 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1425 NFSD_DEBUG(4, "nfsvno_rename: pnfsremove\n"); 1426 } 1427 1428 vrele(tondp->ni_startdir); 1429 nfsvno_relpathbuf(tondp); 1430 out1: 1431 vrele(fromndp->ni_startdir); 1432 nfsvno_relpathbuf(fromndp); 1433 NFSEXITCODE(error); 1434 return (error); 1435 } 1436 1437 /* 1438 * Link vnode op. 1439 */ 1440 int 1441 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1442 struct thread *p, struct nfsexstuff *exp) 1443 { 1444 struct vnode *xp; 1445 int error = 0; 1446 1447 xp = ndp->ni_vp; 1448 if (xp != NULL) { 1449 error = EEXIST; 1450 } else { 1451 xp = ndp->ni_dvp; 1452 if (vp->v_mount != xp->v_mount) 1453 error = EXDEV; 1454 } 1455 if (!error) { 1456 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1457 if ((vp->v_iflag & VI_DOOMED) == 0) 1458 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1459 else 1460 error = EPERM; 1461 if (ndp->ni_dvp == vp) 1462 vrele(ndp->ni_dvp); 1463 else 1464 vput(ndp->ni_dvp); 1465 NFSVOPUNLOCK(vp, 0); 1466 } else { 1467 if (ndp->ni_dvp == ndp->ni_vp) 1468 vrele(ndp->ni_dvp); 1469 else 1470 vput(ndp->ni_dvp); 1471 if (ndp->ni_vp) 1472 vrele(ndp->ni_vp); 1473 } 1474 nfsvno_relpathbuf(ndp); 1475 NFSEXITCODE(error); 1476 return (error); 1477 } 1478 1479 /* 1480 * Do the fsync() appropriate for the commit. 1481 */ 1482 int 1483 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1484 struct thread *td) 1485 { 1486 int error = 0; 1487 1488 /* 1489 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1490 * file is done. At this time VOP_FSYNC does not accept offset and 1491 * byte count parameters so call VOP_FSYNC the whole file for now. 1492 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1493 * File systems that do not use the buffer cache (as indicated 1494 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1495 */ 1496 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1497 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1498 /* 1499 * Give up and do the whole thing 1500 */ 1501 if (vp->v_object && 1502 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1503 VM_OBJECT_WLOCK(vp->v_object); 1504 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1505 VM_OBJECT_WUNLOCK(vp->v_object); 1506 } 1507 error = VOP_FSYNC(vp, MNT_WAIT, td); 1508 } else { 1509 /* 1510 * Locate and synchronously write any buffers that fall 1511 * into the requested range. Note: we are assuming that 1512 * f_iosize is a power of 2. 1513 */ 1514 int iosize = vp->v_mount->mnt_stat.f_iosize; 1515 int iomask = iosize - 1; 1516 struct bufobj *bo; 1517 daddr_t lblkno; 1518 1519 /* 1520 * Align to iosize boundary, super-align to page boundary. 1521 */ 1522 if (off & iomask) { 1523 cnt += off & iomask; 1524 off &= ~(u_quad_t)iomask; 1525 } 1526 if (off & PAGE_MASK) { 1527 cnt += off & PAGE_MASK; 1528 off &= ~(u_quad_t)PAGE_MASK; 1529 } 1530 lblkno = off / iosize; 1531 1532 if (vp->v_object && 1533 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { 1534 VM_OBJECT_WLOCK(vp->v_object); 1535 vm_object_page_clean(vp->v_object, off, off + cnt, 1536 OBJPC_SYNC); 1537 VM_OBJECT_WUNLOCK(vp->v_object); 1538 } 1539 1540 bo = &vp->v_bufobj; 1541 BO_LOCK(bo); 1542 while (cnt > 0) { 1543 struct buf *bp; 1544 1545 /* 1546 * If we have a buffer and it is marked B_DELWRI we 1547 * have to lock and write it. Otherwise the prior 1548 * write is assumed to have already been committed. 1549 * 1550 * gbincore() can return invalid buffers now so we 1551 * have to check that bit as well (though B_DELWRI 1552 * should not be set if B_INVAL is set there could be 1553 * a race here since we haven't locked the buffer). 1554 */ 1555 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1556 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1557 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1558 BO_LOCK(bo); 1559 continue; /* retry */ 1560 } 1561 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1562 B_DELWRI) { 1563 bremfree(bp); 1564 bp->b_flags &= ~B_ASYNC; 1565 bwrite(bp); 1566 ++nfs_commit_miss; 1567 } else 1568 BUF_UNLOCK(bp); 1569 BO_LOCK(bo); 1570 } 1571 ++nfs_commit_blks; 1572 if (cnt < iosize) 1573 break; 1574 cnt -= iosize; 1575 ++lblkno; 1576 } 1577 BO_UNLOCK(bo); 1578 } 1579 NFSEXITCODE(error); 1580 return (error); 1581 } 1582 1583 /* 1584 * Statfs vnode op. 1585 */ 1586 int 1587 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1588 { 1589 struct statfs *tsf; 1590 int error; 1591 1592 tsf = NULL; 1593 if (nfsrv_devidcnt > 0) { 1594 /* For a pNFS service, get the DS numbers. */ 1595 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK | M_ZERO); 1596 error = nfsrv_pnfsstatfs(tsf, vp->v_mount); 1597 if (error != 0) { 1598 free(tsf, M_TEMP); 1599 tsf = NULL; 1600 } 1601 } 1602 error = VFS_STATFS(vp->v_mount, sf); 1603 if (error == 0) { 1604 if (tsf != NULL) { 1605 sf->f_blocks = tsf->f_blocks; 1606 sf->f_bavail = tsf->f_bavail; 1607 sf->f_bfree = tsf->f_bfree; 1608 sf->f_bsize = tsf->f_bsize; 1609 } 1610 /* 1611 * Since NFS handles these values as unsigned on the 1612 * wire, there is no way to represent negative values, 1613 * so set them to 0. Without this, they will appear 1614 * to be very large positive values for clients like 1615 * Solaris10. 1616 */ 1617 if (sf->f_bavail < 0) 1618 sf->f_bavail = 0; 1619 if (sf->f_ffree < 0) 1620 sf->f_ffree = 0; 1621 } 1622 free(tsf, M_TEMP); 1623 NFSEXITCODE(error); 1624 return (error); 1625 } 1626 1627 /* 1628 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1629 * must handle nfsrv_opencheck() calls after any other access checks. 1630 */ 1631 void 1632 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1633 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1634 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1635 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p, 1636 struct nfsexstuff *exp, struct vnode **vpp) 1637 { 1638 struct vnode *vp = NULL; 1639 u_quad_t tempsize; 1640 struct nfsexstuff nes; 1641 1642 if (ndp->ni_vp == NULL) 1643 nd->nd_repstat = nfsrv_opencheck(clientid, 1644 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1645 if (!nd->nd_repstat) { 1646 if (ndp->ni_vp == NULL) { 1647 vrele(ndp->ni_startdir); 1648 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1649 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1650 /* For a pNFS server, create the data file on a DS. */ 1651 if (nd->nd_repstat == 0) { 1652 /* 1653 * Create a data file on a DS for a pNFS server. 1654 * This function just returns if not 1655 * running a pNFS DS or the creation fails. 1656 */ 1657 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1658 cred, p); 1659 } 1660 vput(ndp->ni_dvp); 1661 nfsvno_relpathbuf(ndp); 1662 if (!nd->nd_repstat) { 1663 if (*exclusive_flagp) { 1664 *exclusive_flagp = 0; 1665 NFSVNO_ATTRINIT(nvap); 1666 nvap->na_atime.tv_sec = cverf[0]; 1667 nvap->na_atime.tv_nsec = cverf[1]; 1668 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1669 &nvap->na_vattr, cred); 1670 if (nd->nd_repstat != 0) { 1671 vput(ndp->ni_vp); 1672 ndp->ni_vp = NULL; 1673 nd->nd_repstat = NFSERR_NOTSUPP; 1674 } else 1675 NFSSETBIT_ATTRBIT(attrbitp, 1676 NFSATTRBIT_TIMEACCESS); 1677 } else { 1678 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1679 aclp, p, attrbitp, exp); 1680 } 1681 } 1682 vp = ndp->ni_vp; 1683 } else { 1684 if (ndp->ni_startdir) 1685 vrele(ndp->ni_startdir); 1686 nfsvno_relpathbuf(ndp); 1687 vp = ndp->ni_vp; 1688 if (create == NFSV4OPEN_CREATE) { 1689 if (ndp->ni_dvp == vp) 1690 vrele(ndp->ni_dvp); 1691 else 1692 vput(ndp->ni_dvp); 1693 } 1694 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1695 if (ndp->ni_cnd.cn_flags & RDONLY) 1696 NFSVNO_SETEXRDONLY(&nes); 1697 else 1698 NFSVNO_EXINIT(&nes); 1699 nd->nd_repstat = nfsvno_accchk(vp, 1700 VWRITE, cred, &nes, p, 1701 NFSACCCHK_NOOVERRIDE, 1702 NFSACCCHK_VPISLOCKED, NULL); 1703 nd->nd_repstat = nfsrv_opencheck(clientid, 1704 stateidp, stp, vp, nd, p, nd->nd_repstat); 1705 if (!nd->nd_repstat) { 1706 tempsize = nvap->na_size; 1707 NFSVNO_ATTRINIT(nvap); 1708 nvap->na_size = tempsize; 1709 nd->nd_repstat = VOP_SETATTR(vp, 1710 &nvap->na_vattr, cred); 1711 } 1712 } else if (vp->v_type == VREG) { 1713 nd->nd_repstat = nfsrv_opencheck(clientid, 1714 stateidp, stp, vp, nd, p, nd->nd_repstat); 1715 } 1716 } 1717 } else { 1718 if (ndp->ni_cnd.cn_flags & HASBUF) 1719 nfsvno_relpathbuf(ndp); 1720 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1721 vrele(ndp->ni_startdir); 1722 if (ndp->ni_dvp == ndp->ni_vp) 1723 vrele(ndp->ni_dvp); 1724 else 1725 vput(ndp->ni_dvp); 1726 if (ndp->ni_vp) 1727 vput(ndp->ni_vp); 1728 } 1729 } 1730 *vpp = vp; 1731 1732 NFSEXITCODE2(0, nd); 1733 } 1734 1735 /* 1736 * Updates the file rev and sets the mtime and ctime 1737 * to the current clock time, returning the va_filerev and va_Xtime 1738 * values. 1739 * Return ESTALE to indicate the vnode is VI_DOOMED. 1740 */ 1741 int 1742 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1743 struct nfsrv_descript *nd, struct thread *p) 1744 { 1745 struct vattr va; 1746 1747 VATTR_NULL(&va); 1748 vfs_timestamp(&va.va_mtime); 1749 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1750 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1751 if ((vp->v_iflag & VI_DOOMED) != 0) 1752 return (ESTALE); 1753 } 1754 (void) VOP_SETATTR(vp, &va, nd->nd_cred); 1755 (void) nfsvno_getattr(vp, nvap, nd, p, 1, NULL); 1756 return (0); 1757 } 1758 1759 /* 1760 * Glue routine to nfsv4_fillattr(). 1761 */ 1762 int 1763 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1764 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1765 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1766 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1767 { 1768 struct statfs *sf; 1769 int error; 1770 1771 sf = NULL; 1772 if (nfsrv_devidcnt > 0 && 1773 (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEAVAIL) || 1774 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEFREE) || 1775 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACETOTAL))) { 1776 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK | M_ZERO); 1777 error = nfsrv_pnfsstatfs(sf, mp); 1778 if (error != 0) { 1779 free(sf, M_TEMP); 1780 sf = NULL; 1781 } 1782 } 1783 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1784 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1785 mounted_on_fileno, sf); 1786 free(sf, M_TEMP); 1787 NFSEXITCODE2(0, nd); 1788 return (error); 1789 } 1790 1791 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1792 /* 1793 * nfs readdir service 1794 * - mallocs what it thinks is enough to read 1795 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1796 * - calls VOP_READDIR() 1797 * - loops around building the reply 1798 * if the output generated exceeds count break out of loop 1799 * The NFSM_CLGET macro is used here so that the reply will be packed 1800 * tightly in mbuf clusters. 1801 * - it trims out records with d_fileno == 0 1802 * this doesn't matter for Unix clients, but they might confuse clients 1803 * for other os'. 1804 * - it trims out records with d_type == DT_WHT 1805 * these cannot be seen through NFS (unless we extend the protocol) 1806 * The alternate call nfsrvd_readdirplus() does lookups as well. 1807 * PS: The NFS protocol spec. does not clarify what the "count" byte 1808 * argument is a count of.. just name strings and file id's or the 1809 * entire reply rpc or ... 1810 * I tried just file name and id sizes and it confused the Sun client, 1811 * so I am using the full rpc size now. The "paranoia.." comment refers 1812 * to including the status longwords that are not a part of the dir. 1813 * "entry" structures, but are in the rpc. 1814 */ 1815 int 1816 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1817 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 1818 { 1819 struct dirent *dp; 1820 u_int32_t *tl; 1821 int dirlen; 1822 char *cpos, *cend, *rbuf; 1823 struct nfsvattr at; 1824 int nlen, error = 0, getret = 1; 1825 int siz, cnt, fullsiz, eofflag, ncookies; 1826 u_int64_t off, toff, verf __unused; 1827 u_long *cookies = NULL, *cookiep; 1828 struct uio io; 1829 struct iovec iv; 1830 int is_ufs; 1831 1832 if (nd->nd_repstat) { 1833 nfsrv_postopattr(nd, getret, &at); 1834 goto out; 1835 } 1836 if (nd->nd_flag & ND_NFSV2) { 1837 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1838 off = fxdr_unsigned(u_quad_t, *tl++); 1839 } else { 1840 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1841 off = fxdr_hyper(tl); 1842 tl += 2; 1843 verf = fxdr_hyper(tl); 1844 tl += 2; 1845 } 1846 toff = off; 1847 cnt = fxdr_unsigned(int, *tl); 1848 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1849 cnt = NFS_SRVMAXDATA(nd); 1850 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1851 fullsiz = siz; 1852 if (nd->nd_flag & ND_NFSV3) { 1853 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, 1854 NULL); 1855 #if 0 1856 /* 1857 * va_filerev is not sufficient as a cookie verifier, 1858 * since it is not supposed to change when entries are 1859 * removed/added unless that offset cookies returned to 1860 * the client are no longer valid. 1861 */ 1862 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1863 nd->nd_repstat = NFSERR_BAD_COOKIE; 1864 #endif 1865 } 1866 if (!nd->nd_repstat && vp->v_type != VDIR) 1867 nd->nd_repstat = NFSERR_NOTDIR; 1868 if (nd->nd_repstat == 0 && cnt == 0) { 1869 if (nd->nd_flag & ND_NFSV2) 1870 /* NFSv2 does not have NFSERR_TOOSMALL */ 1871 nd->nd_repstat = EPERM; 1872 else 1873 nd->nd_repstat = NFSERR_TOOSMALL; 1874 } 1875 if (!nd->nd_repstat) 1876 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1877 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1878 NFSACCCHK_VPISLOCKED, NULL); 1879 if (nd->nd_repstat) { 1880 vput(vp); 1881 if (nd->nd_flag & ND_NFSV3) 1882 nfsrv_postopattr(nd, getret, &at); 1883 goto out; 1884 } 1885 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1886 rbuf = malloc(siz, M_TEMP, M_WAITOK); 1887 again: 1888 eofflag = 0; 1889 if (cookies) { 1890 free(cookies, M_TEMP); 1891 cookies = NULL; 1892 } 1893 1894 iv.iov_base = rbuf; 1895 iv.iov_len = siz; 1896 io.uio_iov = &iv; 1897 io.uio_iovcnt = 1; 1898 io.uio_offset = (off_t)off; 1899 io.uio_resid = siz; 1900 io.uio_segflg = UIO_SYSSPACE; 1901 io.uio_rw = UIO_READ; 1902 io.uio_td = NULL; 1903 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1904 &cookies); 1905 off = (u_int64_t)io.uio_offset; 1906 if (io.uio_resid) 1907 siz -= io.uio_resid; 1908 1909 if (!cookies && !nd->nd_repstat) 1910 nd->nd_repstat = NFSERR_PERM; 1911 if (nd->nd_flag & ND_NFSV3) { 1912 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 1913 if (!nd->nd_repstat) 1914 nd->nd_repstat = getret; 1915 } 1916 1917 /* 1918 * Handles the failed cases. nd->nd_repstat == 0 past here. 1919 */ 1920 if (nd->nd_repstat) { 1921 vput(vp); 1922 free(rbuf, M_TEMP); 1923 if (cookies) 1924 free(cookies, M_TEMP); 1925 if (nd->nd_flag & ND_NFSV3) 1926 nfsrv_postopattr(nd, getret, &at); 1927 goto out; 1928 } 1929 /* 1930 * If nothing read, return eof 1931 * rpc reply 1932 */ 1933 if (siz == 0) { 1934 vput(vp); 1935 if (nd->nd_flag & ND_NFSV2) { 1936 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1937 } else { 1938 nfsrv_postopattr(nd, getret, &at); 1939 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1940 txdr_hyper(at.na_filerev, tl); 1941 tl += 2; 1942 } 1943 *tl++ = newnfs_false; 1944 *tl = newnfs_true; 1945 free(rbuf, M_TEMP); 1946 free(cookies, M_TEMP); 1947 goto out; 1948 } 1949 1950 /* 1951 * Check for degenerate cases of nothing useful read. 1952 * If so go try again 1953 */ 1954 cpos = rbuf; 1955 cend = rbuf + siz; 1956 dp = (struct dirent *)cpos; 1957 cookiep = cookies; 1958 1959 /* 1960 * For some reason FreeBSD's ufs_readdir() chooses to back the 1961 * directory offset up to a block boundary, so it is necessary to 1962 * skip over the records that precede the requested offset. This 1963 * requires the assumption that file offset cookies monotonically 1964 * increase. 1965 */ 1966 while (cpos < cend && ncookies > 0 && 1967 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1968 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 1969 cpos += dp->d_reclen; 1970 dp = (struct dirent *)cpos; 1971 cookiep++; 1972 ncookies--; 1973 } 1974 if (cpos >= cend || ncookies == 0) { 1975 siz = fullsiz; 1976 toff = off; 1977 goto again; 1978 } 1979 vput(vp); 1980 1981 /* 1982 * dirlen is the size of the reply, including all XDR and must 1983 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1984 * if the XDR should be included in "count", but to be safe, we do. 1985 * (Include the two booleans at the end of the reply in dirlen now.) 1986 */ 1987 if (nd->nd_flag & ND_NFSV3) { 1988 nfsrv_postopattr(nd, getret, &at); 1989 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1990 txdr_hyper(at.na_filerev, tl); 1991 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1992 } else { 1993 dirlen = 2 * NFSX_UNSIGNED; 1994 } 1995 1996 /* Loop through the records and build reply */ 1997 while (cpos < cend && ncookies > 0) { 1998 nlen = dp->d_namlen; 1999 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2000 nlen <= NFS_MAXNAMLEN) { 2001 if (nd->nd_flag & ND_NFSV3) 2002 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2003 else 2004 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2005 if (dirlen > cnt) { 2006 eofflag = 0; 2007 break; 2008 } 2009 2010 /* 2011 * Build the directory record xdr from 2012 * the dirent entry. 2013 */ 2014 if (nd->nd_flag & ND_NFSV3) { 2015 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2016 *tl++ = newnfs_true; 2017 *tl++ = 0; 2018 } else { 2019 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2020 *tl++ = newnfs_true; 2021 } 2022 *tl = txdr_unsigned(dp->d_fileno); 2023 (void) nfsm_strtom(nd, dp->d_name, nlen); 2024 if (nd->nd_flag & ND_NFSV3) { 2025 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2026 *tl++ = 0; 2027 } else 2028 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 2029 *tl = txdr_unsigned(*cookiep); 2030 } 2031 cpos += dp->d_reclen; 2032 dp = (struct dirent *)cpos; 2033 cookiep++; 2034 ncookies--; 2035 } 2036 if (cpos < cend) 2037 eofflag = 0; 2038 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2039 *tl++ = newnfs_false; 2040 if (eofflag) 2041 *tl = newnfs_true; 2042 else 2043 *tl = newnfs_false; 2044 free(rbuf, M_TEMP); 2045 free(cookies, M_TEMP); 2046 2047 out: 2048 NFSEXITCODE2(0, nd); 2049 return (0); 2050 nfsmout: 2051 vput(vp); 2052 NFSEXITCODE2(error, nd); 2053 return (error); 2054 } 2055 2056 /* 2057 * Readdirplus for V3 and Readdir for V4. 2058 */ 2059 int 2060 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 2061 struct vnode *vp, struct thread *p, struct nfsexstuff *exp) 2062 { 2063 struct dirent *dp; 2064 u_int32_t *tl; 2065 int dirlen; 2066 char *cpos, *cend, *rbuf; 2067 struct vnode *nvp; 2068 fhandle_t nfh; 2069 struct nfsvattr nva, at, *nvap = &nva; 2070 struct mbuf *mb0, *mb1; 2071 struct nfsreferral *refp; 2072 int nlen, r, error = 0, getret = 1, usevget = 1; 2073 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 2074 caddr_t bpos0, bpos1; 2075 u_int64_t off, toff, verf; 2076 u_long *cookies = NULL, *cookiep; 2077 nfsattrbit_t attrbits, rderrbits, savbits; 2078 struct uio io; 2079 struct iovec iv; 2080 struct componentname cn; 2081 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 2082 struct mount *mp, *new_mp; 2083 uint64_t mounted_on_fileno; 2084 2085 if (nd->nd_repstat) { 2086 nfsrv_postopattr(nd, getret, &at); 2087 goto out; 2088 } 2089 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2090 off = fxdr_hyper(tl); 2091 toff = off; 2092 tl += 2; 2093 verf = fxdr_hyper(tl); 2094 tl += 2; 2095 siz = fxdr_unsigned(int, *tl++); 2096 cnt = fxdr_unsigned(int, *tl); 2097 2098 /* 2099 * Use the server's maximum data transfer size as the upper bound 2100 * on reply datalen. 2101 */ 2102 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2103 cnt = NFS_SRVMAXDATA(nd); 2104 2105 /* 2106 * siz is a "hint" of how much directory information (name, fileid, 2107 * cookie) should be in the reply. At least one client "hints" 0, 2108 * so I set it to cnt for that case. I also round it up to the 2109 * next multiple of DIRBLKSIZ. 2110 * Since the size of a Readdirplus directory entry reply will always 2111 * be greater than a directory entry returned by VOP_READDIR(), it 2112 * does not make sense to read more than NFS_SRVMAXDATA() via 2113 * VOP_READDIR(). 2114 */ 2115 if (siz <= 0) 2116 siz = cnt; 2117 else if (siz > NFS_SRVMAXDATA(nd)) 2118 siz = NFS_SRVMAXDATA(nd); 2119 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2120 2121 if (nd->nd_flag & ND_NFSV4) { 2122 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 2123 if (error) 2124 goto nfsmout; 2125 NFSSET_ATTRBIT(&savbits, &attrbits); 2126 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits); 2127 NFSZERO_ATTRBIT(&rderrbits); 2128 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 2129 } else { 2130 NFSZERO_ATTRBIT(&attrbits); 2131 } 2132 fullsiz = siz; 2133 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2134 #if 0 2135 if (!nd->nd_repstat) { 2136 if (off && verf != at.na_filerev) { 2137 /* 2138 * va_filerev is not sufficient as a cookie verifier, 2139 * since it is not supposed to change when entries are 2140 * removed/added unless that offset cookies returned to 2141 * the client are no longer valid. 2142 */ 2143 if (nd->nd_flag & ND_NFSV4) { 2144 nd->nd_repstat = NFSERR_NOTSAME; 2145 } else { 2146 nd->nd_repstat = NFSERR_BAD_COOKIE; 2147 } 2148 } 2149 } 2150 #endif 2151 if (!nd->nd_repstat && vp->v_type != VDIR) 2152 nd->nd_repstat = NFSERR_NOTDIR; 2153 if (!nd->nd_repstat && cnt == 0) 2154 nd->nd_repstat = NFSERR_TOOSMALL; 2155 if (!nd->nd_repstat) 2156 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2157 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2158 NFSACCCHK_VPISLOCKED, NULL); 2159 if (nd->nd_repstat) { 2160 vput(vp); 2161 if (nd->nd_flag & ND_NFSV3) 2162 nfsrv_postopattr(nd, getret, &at); 2163 goto out; 2164 } 2165 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2166 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 2167 2168 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2169 again: 2170 eofflag = 0; 2171 if (cookies) { 2172 free(cookies, M_TEMP); 2173 cookies = NULL; 2174 } 2175 2176 iv.iov_base = rbuf; 2177 iv.iov_len = siz; 2178 io.uio_iov = &iv; 2179 io.uio_iovcnt = 1; 2180 io.uio_offset = (off_t)off; 2181 io.uio_resid = siz; 2182 io.uio_segflg = UIO_SYSSPACE; 2183 io.uio_rw = UIO_READ; 2184 io.uio_td = NULL; 2185 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2186 &cookies); 2187 off = (u_int64_t)io.uio_offset; 2188 if (io.uio_resid) 2189 siz -= io.uio_resid; 2190 2191 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2192 2193 if (!cookies && !nd->nd_repstat) 2194 nd->nd_repstat = NFSERR_PERM; 2195 if (!nd->nd_repstat) 2196 nd->nd_repstat = getret; 2197 if (nd->nd_repstat) { 2198 vput(vp); 2199 if (cookies) 2200 free(cookies, M_TEMP); 2201 free(rbuf, M_TEMP); 2202 if (nd->nd_flag & ND_NFSV3) 2203 nfsrv_postopattr(nd, getret, &at); 2204 goto out; 2205 } 2206 /* 2207 * If nothing read, return eof 2208 * rpc reply 2209 */ 2210 if (siz == 0) { 2211 vput(vp); 2212 if (nd->nd_flag & ND_NFSV3) 2213 nfsrv_postopattr(nd, getret, &at); 2214 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2215 txdr_hyper(at.na_filerev, tl); 2216 tl += 2; 2217 *tl++ = newnfs_false; 2218 *tl = newnfs_true; 2219 free(cookies, M_TEMP); 2220 free(rbuf, M_TEMP); 2221 goto out; 2222 } 2223 2224 /* 2225 * Check for degenerate cases of nothing useful read. 2226 * If so go try again 2227 */ 2228 cpos = rbuf; 2229 cend = rbuf + siz; 2230 dp = (struct dirent *)cpos; 2231 cookiep = cookies; 2232 2233 /* 2234 * For some reason FreeBSD's ufs_readdir() chooses to back the 2235 * directory offset up to a block boundary, so it is necessary to 2236 * skip over the records that precede the requested offset. This 2237 * requires the assumption that file offset cookies monotonically 2238 * increase. 2239 */ 2240 while (cpos < cend && ncookies > 0 && 2241 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2242 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 2243 ((nd->nd_flag & ND_NFSV4) && 2244 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 2245 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 2246 cpos += dp->d_reclen; 2247 dp = (struct dirent *)cpos; 2248 cookiep++; 2249 ncookies--; 2250 } 2251 if (cpos >= cend || ncookies == 0) { 2252 siz = fullsiz; 2253 toff = off; 2254 goto again; 2255 } 2256 2257 /* 2258 * Busy the file system so that the mount point won't go away 2259 * and, as such, VFS_VGET() can be used safely. 2260 */ 2261 mp = vp->v_mount; 2262 vfs_ref(mp); 2263 NFSVOPUNLOCK(vp, 0); 2264 nd->nd_repstat = vfs_busy(mp, 0); 2265 vfs_rel(mp); 2266 if (nd->nd_repstat != 0) { 2267 vrele(vp); 2268 free(cookies, M_TEMP); 2269 free(rbuf, M_TEMP); 2270 if (nd->nd_flag & ND_NFSV3) 2271 nfsrv_postopattr(nd, getret, &at); 2272 goto out; 2273 } 2274 2275 /* 2276 * Check to see if entries in this directory can be safely acquired 2277 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2278 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2279 * automount of the snapshot directory that is required will 2280 * be done. 2281 * This needs to be done here for NFSv4, since NFSv4 never does 2282 * a VFS_VGET() for "." or "..". 2283 */ 2284 if (is_zfs == 1) { 2285 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2286 if (r == EOPNOTSUPP) { 2287 usevget = 0; 2288 cn.cn_nameiop = LOOKUP; 2289 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2290 cn.cn_cred = nd->nd_cred; 2291 cn.cn_thread = p; 2292 } else if (r == 0) 2293 vput(nvp); 2294 } 2295 2296 /* 2297 * Save this position, in case there is an error before one entry 2298 * is created. 2299 */ 2300 mb0 = nd->nd_mb; 2301 bpos0 = nd->nd_bpos; 2302 2303 /* 2304 * Fill in the first part of the reply. 2305 * dirlen is the reply length in bytes and cannot exceed cnt. 2306 * (Include the two booleans at the end of the reply in dirlen now, 2307 * so we recognize when we have exceeded cnt.) 2308 */ 2309 if (nd->nd_flag & ND_NFSV3) { 2310 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2311 nfsrv_postopattr(nd, getret, &at); 2312 } else { 2313 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2314 } 2315 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2316 txdr_hyper(at.na_filerev, tl); 2317 2318 /* 2319 * Save this position, in case there is an empty reply needed. 2320 */ 2321 mb1 = nd->nd_mb; 2322 bpos1 = nd->nd_bpos; 2323 2324 /* Loop through the records and build reply */ 2325 entrycnt = 0; 2326 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2327 nlen = dp->d_namlen; 2328 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2329 nlen <= NFS_MAXNAMLEN && 2330 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2331 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2332 || (nlen == 1 && dp->d_name[0] != '.'))) { 2333 /* 2334 * Save the current position in the reply, in case 2335 * this entry exceeds cnt. 2336 */ 2337 mb1 = nd->nd_mb; 2338 bpos1 = nd->nd_bpos; 2339 2340 /* 2341 * For readdir_and_lookup get the vnode using 2342 * the file number. 2343 */ 2344 nvp = NULL; 2345 refp = NULL; 2346 r = 0; 2347 at_root = 0; 2348 needs_unbusy = 0; 2349 new_mp = mp; 2350 mounted_on_fileno = (uint64_t)dp->d_fileno; 2351 if ((nd->nd_flag & ND_NFSV3) || 2352 NFSNONZERO_ATTRBIT(&savbits)) { 2353 if (nd->nd_flag & ND_NFSV4) 2354 refp = nfsv4root_getreferral(NULL, 2355 vp, dp->d_fileno); 2356 if (refp == NULL) { 2357 if (usevget) 2358 r = VFS_VGET(mp, dp->d_fileno, 2359 LK_SHARED, &nvp); 2360 else 2361 r = EOPNOTSUPP; 2362 if (r == EOPNOTSUPP) { 2363 if (usevget) { 2364 usevget = 0; 2365 cn.cn_nameiop = LOOKUP; 2366 cn.cn_lkflags = 2367 LK_SHARED | 2368 LK_RETRY; 2369 cn.cn_cred = 2370 nd->nd_cred; 2371 cn.cn_thread = p; 2372 } 2373 cn.cn_nameptr = dp->d_name; 2374 cn.cn_namelen = nlen; 2375 cn.cn_flags = ISLASTCN | 2376 NOFOLLOW | LOCKLEAF; 2377 if (nlen == 2 && 2378 dp->d_name[0] == '.' && 2379 dp->d_name[1] == '.') 2380 cn.cn_flags |= 2381 ISDOTDOT; 2382 if (NFSVOPLOCK(vp, LK_SHARED) 2383 != 0) { 2384 nd->nd_repstat = EPERM; 2385 break; 2386 } 2387 if ((vp->v_vflag & VV_ROOT) != 0 2388 && (cn.cn_flags & ISDOTDOT) 2389 != 0) { 2390 vref(vp); 2391 nvp = vp; 2392 r = 0; 2393 } else { 2394 r = VOP_LOOKUP(vp, &nvp, 2395 &cn); 2396 if (vp != nvp) 2397 NFSVOPUNLOCK(vp, 2398 0); 2399 } 2400 } 2401 2402 /* 2403 * For NFSv4, check to see if nvp is 2404 * a mount point and get the mount 2405 * point vnode, as required. 2406 */ 2407 if (r == 0 && 2408 nfsrv_enable_crossmntpt != 0 && 2409 (nd->nd_flag & ND_NFSV4) != 0 && 2410 nvp->v_type == VDIR && 2411 nvp->v_mountedhere != NULL) { 2412 new_mp = nvp->v_mountedhere; 2413 r = vfs_busy(new_mp, 0); 2414 vput(nvp); 2415 nvp = NULL; 2416 if (r == 0) { 2417 r = VFS_ROOT(new_mp, 2418 LK_SHARED, &nvp); 2419 needs_unbusy = 1; 2420 if (r == 0) 2421 at_root = 1; 2422 } 2423 } 2424 } 2425 2426 /* 2427 * If we failed to look up the entry, then it 2428 * has become invalid, most likely removed. 2429 */ 2430 if (r != 0) { 2431 if (needs_unbusy) 2432 vfs_unbusy(new_mp); 2433 goto invalid; 2434 } 2435 KASSERT(refp != NULL || nvp != NULL, 2436 ("%s: undetected lookup error", __func__)); 2437 2438 if (refp == NULL && 2439 ((nd->nd_flag & ND_NFSV3) || 2440 NFSNONZERO_ATTRBIT(&attrbits))) { 2441 r = nfsvno_getfh(nvp, &nfh, p); 2442 if (!r) 2443 r = nfsvno_getattr(nvp, nvap, nd, p, 2444 1, &attrbits); 2445 if (r == 0 && is_zfs == 1 && 2446 nfsrv_enable_crossmntpt != 0 && 2447 (nd->nd_flag & ND_NFSV4) != 0 && 2448 nvp->v_type == VDIR && 2449 vp->v_mount != nvp->v_mount) { 2450 /* 2451 * For a ZFS snapshot, there is a 2452 * pseudo mount that does not set 2453 * v_mountedhere, so it needs to 2454 * be detected via a different 2455 * mount structure. 2456 */ 2457 at_root = 1; 2458 if (new_mp == mp) 2459 new_mp = nvp->v_mount; 2460 } 2461 } 2462 2463 /* 2464 * If we failed to get attributes of the entry, 2465 * then just skip it for NFSv3 (the traditional 2466 * behavior in the old NFS server). 2467 * For NFSv4 the behavior is controlled by 2468 * RDATTRERROR: we either ignore the error or 2469 * fail the request. 2470 * Note that RDATTRERROR is never set for NFSv3. 2471 */ 2472 if (r != 0) { 2473 if (!NFSISSET_ATTRBIT(&attrbits, 2474 NFSATTRBIT_RDATTRERROR)) { 2475 vput(nvp); 2476 if (needs_unbusy != 0) 2477 vfs_unbusy(new_mp); 2478 if ((nd->nd_flag & ND_NFSV3)) 2479 goto invalid; 2480 nd->nd_repstat = r; 2481 break; 2482 } 2483 } 2484 } 2485 2486 /* 2487 * Build the directory record xdr 2488 */ 2489 if (nd->nd_flag & ND_NFSV3) { 2490 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2491 *tl++ = newnfs_true; 2492 *tl++ = 0; 2493 *tl = txdr_unsigned(dp->d_fileno); 2494 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2495 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2496 *tl++ = 0; 2497 *tl = txdr_unsigned(*cookiep); 2498 nfsrv_postopattr(nd, 0, nvap); 2499 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2500 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2501 if (nvp != NULL) 2502 vput(nvp); 2503 } else { 2504 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2505 *tl++ = newnfs_true; 2506 *tl++ = 0; 2507 *tl = txdr_unsigned(*cookiep); 2508 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2509 if (nvp != NULL) { 2510 supports_nfsv4acls = 2511 nfs_supportsnfsv4acls(nvp); 2512 NFSVOPUNLOCK(nvp, 0); 2513 } else 2514 supports_nfsv4acls = 0; 2515 if (refp != NULL) { 2516 dirlen += nfsrv_putreferralattr(nd, 2517 &savbits, refp, 0, 2518 &nd->nd_repstat); 2519 if (nd->nd_repstat) { 2520 if (nvp != NULL) 2521 vrele(nvp); 2522 if (needs_unbusy != 0) 2523 vfs_unbusy(new_mp); 2524 break; 2525 } 2526 } else if (r) { 2527 dirlen += nfsvno_fillattr(nd, new_mp, 2528 nvp, nvap, &nfh, r, &rderrbits, 2529 nd->nd_cred, p, isdgram, 0, 2530 supports_nfsv4acls, at_root, 2531 mounted_on_fileno); 2532 } else { 2533 dirlen += nfsvno_fillattr(nd, new_mp, 2534 nvp, nvap, &nfh, r, &attrbits, 2535 nd->nd_cred, p, isdgram, 0, 2536 supports_nfsv4acls, at_root, 2537 mounted_on_fileno); 2538 } 2539 if (nvp != NULL) 2540 vrele(nvp); 2541 dirlen += (3 * NFSX_UNSIGNED); 2542 } 2543 if (needs_unbusy != 0) 2544 vfs_unbusy(new_mp); 2545 if (dirlen <= cnt) 2546 entrycnt++; 2547 } 2548 invalid: 2549 cpos += dp->d_reclen; 2550 dp = (struct dirent *)cpos; 2551 cookiep++; 2552 ncookies--; 2553 } 2554 vrele(vp); 2555 vfs_unbusy(mp); 2556 2557 /* 2558 * If dirlen > cnt, we must strip off the last entry. If that 2559 * results in an empty reply, report NFSERR_TOOSMALL. 2560 */ 2561 if (dirlen > cnt || nd->nd_repstat) { 2562 if (!nd->nd_repstat && entrycnt == 0) 2563 nd->nd_repstat = NFSERR_TOOSMALL; 2564 if (nd->nd_repstat) { 2565 newnfs_trimtrailing(nd, mb0, bpos0); 2566 if (nd->nd_flag & ND_NFSV3) 2567 nfsrv_postopattr(nd, getret, &at); 2568 } else 2569 newnfs_trimtrailing(nd, mb1, bpos1); 2570 eofflag = 0; 2571 } else if (cpos < cend) 2572 eofflag = 0; 2573 if (!nd->nd_repstat) { 2574 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2575 *tl++ = newnfs_false; 2576 if (eofflag) 2577 *tl = newnfs_true; 2578 else 2579 *tl = newnfs_false; 2580 } 2581 free(cookies, M_TEMP); 2582 free(rbuf, M_TEMP); 2583 2584 out: 2585 NFSEXITCODE2(0, nd); 2586 return (0); 2587 nfsmout: 2588 vput(vp); 2589 NFSEXITCODE2(error, nd); 2590 return (error); 2591 } 2592 2593 /* 2594 * Get the settable attributes out of the mbuf list. 2595 * (Return 0 or EBADRPC) 2596 */ 2597 int 2598 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2599 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2600 { 2601 u_int32_t *tl; 2602 struct nfsv2_sattr *sp; 2603 int error = 0, toclient = 0; 2604 2605 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2606 case ND_NFSV2: 2607 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2608 /* 2609 * Some old clients didn't fill in the high order 16bits. 2610 * --> check the low order 2 bytes for 0xffff 2611 */ 2612 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2613 nvap->na_mode = nfstov_mode(sp->sa_mode); 2614 if (sp->sa_uid != newnfs_xdrneg1) 2615 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2616 if (sp->sa_gid != newnfs_xdrneg1) 2617 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2618 if (sp->sa_size != newnfs_xdrneg1) 2619 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2620 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2621 #ifdef notyet 2622 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2623 #else 2624 nvap->na_atime.tv_sec = 2625 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2626 nvap->na_atime.tv_nsec = 0; 2627 #endif 2628 } 2629 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2630 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2631 break; 2632 case ND_NFSV3: 2633 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2634 if (*tl == newnfs_true) { 2635 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2636 nvap->na_mode = nfstov_mode(*tl); 2637 } 2638 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2639 if (*tl == newnfs_true) { 2640 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2641 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2642 } 2643 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2644 if (*tl == newnfs_true) { 2645 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2646 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2647 } 2648 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2649 if (*tl == newnfs_true) { 2650 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2651 nvap->na_size = fxdr_hyper(tl); 2652 } 2653 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2654 switch (fxdr_unsigned(int, *tl)) { 2655 case NFSV3SATTRTIME_TOCLIENT: 2656 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2657 fxdr_nfsv3time(tl, &nvap->na_atime); 2658 toclient = 1; 2659 break; 2660 case NFSV3SATTRTIME_TOSERVER: 2661 vfs_timestamp(&nvap->na_atime); 2662 nvap->na_vaflags |= VA_UTIMES_NULL; 2663 break; 2664 } 2665 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2666 switch (fxdr_unsigned(int, *tl)) { 2667 case NFSV3SATTRTIME_TOCLIENT: 2668 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2669 fxdr_nfsv3time(tl, &nvap->na_mtime); 2670 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2671 break; 2672 case NFSV3SATTRTIME_TOSERVER: 2673 vfs_timestamp(&nvap->na_mtime); 2674 if (!toclient) 2675 nvap->na_vaflags |= VA_UTIMES_NULL; 2676 break; 2677 } 2678 break; 2679 case ND_NFSV4: 2680 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2681 } 2682 nfsmout: 2683 NFSEXITCODE2(error, nd); 2684 return (error); 2685 } 2686 2687 /* 2688 * Handle the setable attributes for V4. 2689 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2690 */ 2691 int 2692 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2693 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2694 { 2695 u_int32_t *tl; 2696 int attrsum = 0; 2697 int i, j; 2698 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2699 int toclient = 0; 2700 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2701 uid_t uid; 2702 gid_t gid; 2703 2704 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2705 if (error) 2706 goto nfsmout; 2707 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2708 attrsize = fxdr_unsigned(int, *tl); 2709 2710 /* 2711 * Loop around getting the setable attributes. If an unsupported 2712 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2713 */ 2714 if (retnotsup) { 2715 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2716 bitpos = NFSATTRBIT_MAX; 2717 } else { 2718 bitpos = 0; 2719 } 2720 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2721 if (attrsum > attrsize) { 2722 error = NFSERR_BADXDR; 2723 goto nfsmout; 2724 } 2725 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2726 switch (bitpos) { 2727 case NFSATTRBIT_SIZE: 2728 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2729 if (vp != NULL && vp->v_type != VREG) { 2730 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2731 NFSERR_INVAL; 2732 goto nfsmout; 2733 } 2734 nvap->na_size = fxdr_hyper(tl); 2735 attrsum += NFSX_HYPER; 2736 break; 2737 case NFSATTRBIT_ACL: 2738 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2739 p); 2740 if (error) 2741 goto nfsmout; 2742 if (aceerr && !nd->nd_repstat) 2743 nd->nd_repstat = aceerr; 2744 attrsum += aclsize; 2745 break; 2746 case NFSATTRBIT_ARCHIVE: 2747 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2748 if (!nd->nd_repstat) 2749 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2750 attrsum += NFSX_UNSIGNED; 2751 break; 2752 case NFSATTRBIT_HIDDEN: 2753 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2754 if (!nd->nd_repstat) 2755 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2756 attrsum += NFSX_UNSIGNED; 2757 break; 2758 case NFSATTRBIT_MIMETYPE: 2759 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2760 i = fxdr_unsigned(int, *tl); 2761 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2762 if (error) 2763 goto nfsmout; 2764 if (!nd->nd_repstat) 2765 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2766 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2767 break; 2768 case NFSATTRBIT_MODE: 2769 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2770 nvap->na_mode = nfstov_mode(*tl); 2771 attrsum += NFSX_UNSIGNED; 2772 break; 2773 case NFSATTRBIT_OWNER: 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_strtouid(nd, cp, j, &uid, 2792 p); 2793 if (!nd->nd_repstat) 2794 nvap->na_uid = uid; 2795 } 2796 if (j > NFSV4_SMALLSTR) 2797 free(cp, M_NFSSTRING); 2798 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2799 break; 2800 case NFSATTRBIT_OWNERGROUP: 2801 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2802 j = fxdr_unsigned(int, *tl); 2803 if (j < 0) { 2804 error = NFSERR_BADXDR; 2805 goto nfsmout; 2806 } 2807 if (j > NFSV4_SMALLSTR) 2808 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2809 else 2810 cp = namestr; 2811 error = nfsrv_mtostr(nd, cp, j); 2812 if (error) { 2813 if (j > NFSV4_SMALLSTR) 2814 free(cp, M_NFSSTRING); 2815 goto nfsmout; 2816 } 2817 if (!nd->nd_repstat) { 2818 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid, 2819 p); 2820 if (!nd->nd_repstat) 2821 nvap->na_gid = gid; 2822 } 2823 if (j > NFSV4_SMALLSTR) 2824 free(cp, M_NFSSTRING); 2825 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2826 break; 2827 case NFSATTRBIT_SYSTEM: 2828 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2829 if (!nd->nd_repstat) 2830 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2831 attrsum += NFSX_UNSIGNED; 2832 break; 2833 case NFSATTRBIT_TIMEACCESSSET: 2834 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2835 attrsum += NFSX_UNSIGNED; 2836 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2837 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2838 fxdr_nfsv4time(tl, &nvap->na_atime); 2839 toclient = 1; 2840 attrsum += NFSX_V4TIME; 2841 } else { 2842 vfs_timestamp(&nvap->na_atime); 2843 nvap->na_vaflags |= VA_UTIMES_NULL; 2844 } 2845 break; 2846 case NFSATTRBIT_TIMEBACKUP: 2847 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2848 if (!nd->nd_repstat) 2849 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2850 attrsum += NFSX_V4TIME; 2851 break; 2852 case NFSATTRBIT_TIMECREATE: 2853 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2854 if (!nd->nd_repstat) 2855 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2856 attrsum += NFSX_V4TIME; 2857 break; 2858 case NFSATTRBIT_TIMEMODIFYSET: 2859 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2860 attrsum += NFSX_UNSIGNED; 2861 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2862 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2863 fxdr_nfsv4time(tl, &nvap->na_mtime); 2864 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2865 attrsum += NFSX_V4TIME; 2866 } else { 2867 vfs_timestamp(&nvap->na_mtime); 2868 if (!toclient) 2869 nvap->na_vaflags |= VA_UTIMES_NULL; 2870 } 2871 break; 2872 default: 2873 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2874 /* 2875 * set bitpos so we drop out of the loop. 2876 */ 2877 bitpos = NFSATTRBIT_MAX; 2878 break; 2879 } 2880 } 2881 2882 /* 2883 * some clients pad the attrlist, so we need to skip over the 2884 * padding. 2885 */ 2886 if (attrsum > attrsize) { 2887 error = NFSERR_BADXDR; 2888 } else { 2889 attrsize = NFSM_RNDUP(attrsize); 2890 if (attrsum < attrsize) 2891 error = nfsm_advance(nd, attrsize - attrsum, -1); 2892 } 2893 nfsmout: 2894 NFSEXITCODE2(error, nd); 2895 return (error); 2896 } 2897 2898 /* 2899 * Check/setup export credentials. 2900 */ 2901 int 2902 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2903 struct ucred *credanon) 2904 { 2905 int error = 0; 2906 2907 /* 2908 * Check/setup credentials. 2909 */ 2910 if (nd->nd_flag & ND_GSS) 2911 exp->nes_exflag &= ~MNT_EXPORTANON; 2912 2913 /* 2914 * Check to see if the operation is allowed for this security flavor. 2915 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2916 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2917 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2918 */ 2919 if (nfsvno_testexp(nd, exp) && 2920 nd->nd_procnum != NFSV4OP_SECINFO && 2921 nd->nd_procnum != NFSPROC_FSINFO) { 2922 if (nd->nd_flag & ND_NFSV4) 2923 error = NFSERR_WRONGSEC; 2924 else 2925 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2926 goto out; 2927 } 2928 2929 /* 2930 * Check to see if the file system is exported V4 only. 2931 */ 2932 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2933 error = NFSERR_PROGNOTV4; 2934 goto out; 2935 } 2936 2937 /* 2938 * Now, map the user credentials. 2939 * (Note that ND_AUTHNONE will only be set for an NFSv3 2940 * Fsinfo RPC. If set for anything else, this code might need 2941 * to change.) 2942 */ 2943 if (NFSVNO_EXPORTED(exp)) { 2944 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2945 NFSVNO_EXPORTANON(exp) || 2946 (nd->nd_flag & ND_AUTHNONE) != 0) { 2947 nd->nd_cred->cr_uid = credanon->cr_uid; 2948 nd->nd_cred->cr_gid = credanon->cr_gid; 2949 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2950 credanon->cr_groups); 2951 } else if ((nd->nd_flag & ND_GSS) == 0) { 2952 /* 2953 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2954 * if there is a replacement credential with a group 2955 * list set up by "nfsuserd -manage-gids". 2956 * If there is no replacement, nfsrv_getgrpscred() 2957 * simply returns its argument. 2958 */ 2959 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2960 } 2961 } 2962 2963 out: 2964 NFSEXITCODE2(error, nd); 2965 return (error); 2966 } 2967 2968 /* 2969 * Check exports. 2970 */ 2971 int 2972 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 2973 struct ucred **credp) 2974 { 2975 int i, error, *secflavors; 2976 2977 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 2978 &exp->nes_numsecflavor, &secflavors); 2979 if (error) { 2980 if (nfs_rootfhset) { 2981 exp->nes_exflag = 0; 2982 exp->nes_numsecflavor = 0; 2983 error = 0; 2984 } 2985 } else { 2986 /* Copy the security flavors. */ 2987 for (i = 0; i < exp->nes_numsecflavor; i++) 2988 exp->nes_secflavors[i] = secflavors[i]; 2989 } 2990 NFSEXITCODE(error); 2991 return (error); 2992 } 2993 2994 /* 2995 * Get a vnode for a file handle and export stuff. 2996 */ 2997 int 2998 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 2999 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 3000 struct ucred **credp) 3001 { 3002 int i, error, *secflavors; 3003 3004 *credp = NULL; 3005 exp->nes_numsecflavor = 0; 3006 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 3007 if (error != 0) 3008 /* Make sure the server replies ESTALE to the client. */ 3009 error = ESTALE; 3010 if (nam && !error) { 3011 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3012 &exp->nes_numsecflavor, &secflavors); 3013 if (error) { 3014 if (nfs_rootfhset) { 3015 exp->nes_exflag = 0; 3016 exp->nes_numsecflavor = 0; 3017 error = 0; 3018 } else { 3019 vput(*vpp); 3020 } 3021 } else { 3022 /* Copy the security flavors. */ 3023 for (i = 0; i < exp->nes_numsecflavor; i++) 3024 exp->nes_secflavors[i] = secflavors[i]; 3025 } 3026 } 3027 NFSEXITCODE(error); 3028 return (error); 3029 } 3030 3031 /* 3032 * nfsd_fhtovp() - convert a fh to a vnode ptr 3033 * - look up fsid in mount list (if not found ret error) 3034 * - get vp and export rights by calling nfsvno_fhtovp() 3035 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 3036 * for AUTH_SYS 3037 * - if mpp != NULL, return the mount point so that it can 3038 * be used for vn_finished_write() by the caller 3039 */ 3040 void 3041 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 3042 struct vnode **vpp, struct nfsexstuff *exp, 3043 struct mount **mpp, int startwrite, struct thread *p) 3044 { 3045 struct mount *mp; 3046 struct ucred *credanon; 3047 fhandle_t *fhp; 3048 3049 fhp = (fhandle_t *)nfp->nfsrvfh_data; 3050 /* 3051 * Check for the special case of the nfsv4root_fh. 3052 */ 3053 mp = vfs_busyfs(&fhp->fh_fsid); 3054 if (mpp != NULL) 3055 *mpp = mp; 3056 if (mp == NULL) { 3057 *vpp = NULL; 3058 nd->nd_repstat = ESTALE; 3059 goto out; 3060 } 3061 3062 if (startwrite) { 3063 vn_start_write(NULL, mpp, V_WAIT); 3064 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 3065 lktype = LK_EXCLUSIVE; 3066 } 3067 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 3068 &credanon); 3069 vfs_unbusy(mp); 3070 3071 /* 3072 * For NFSv4 without a pseudo root fs, unexported file handles 3073 * can be returned, so that Lookup works everywhere. 3074 */ 3075 if (!nd->nd_repstat && exp->nes_exflag == 0 && 3076 !(nd->nd_flag & ND_NFSV4)) { 3077 vput(*vpp); 3078 nd->nd_repstat = EACCES; 3079 } 3080 3081 /* 3082 * Personally, I've never seen any point in requiring a 3083 * reserved port#, since only in the rare case where the 3084 * clients are all boxes with secure system privileges, 3085 * does it provide any enhanced security, but... some people 3086 * believe it to be useful and keep putting this code back in. 3087 * (There is also some "security checker" out there that 3088 * complains if the nfs server doesn't enforce this.) 3089 * However, note the following: 3090 * RFC3530 (NFSv4) specifies that a reserved port# not be 3091 * required. 3092 * RFC2623 recommends that, if a reserved port# is checked for, 3093 * that there be a way to turn that off--> ifdef'd. 3094 */ 3095 #ifdef NFS_REQRSVPORT 3096 if (!nd->nd_repstat) { 3097 struct sockaddr_in *saddr; 3098 struct sockaddr_in6 *saddr6; 3099 3100 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3101 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 3102 if (!(nd->nd_flag & ND_NFSV4) && 3103 ((saddr->sin_family == AF_INET && 3104 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 3105 (saddr6->sin6_family == AF_INET6 && 3106 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 3107 vput(*vpp); 3108 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3109 } 3110 } 3111 #endif /* NFS_REQRSVPORT */ 3112 3113 /* 3114 * Check/setup credentials. 3115 */ 3116 if (!nd->nd_repstat) { 3117 nd->nd_saveduid = nd->nd_cred->cr_uid; 3118 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 3119 if (nd->nd_repstat) 3120 vput(*vpp); 3121 } 3122 if (credanon != NULL) 3123 crfree(credanon); 3124 if (nd->nd_repstat) { 3125 if (startwrite) 3126 vn_finished_write(mp); 3127 *vpp = NULL; 3128 if (mpp != NULL) 3129 *mpp = NULL; 3130 } 3131 3132 out: 3133 NFSEXITCODE2(0, nd); 3134 } 3135 3136 /* 3137 * glue for fp. 3138 */ 3139 static int 3140 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 3141 { 3142 struct filedesc *fdp; 3143 struct file *fp; 3144 int error = 0; 3145 3146 fdp = p->td_proc->p_fd; 3147 if (fd < 0 || fd >= fdp->fd_nfiles || 3148 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 3149 error = EBADF; 3150 goto out; 3151 } 3152 *fpp = fp; 3153 3154 out: 3155 NFSEXITCODE(error); 3156 return (error); 3157 } 3158 3159 /* 3160 * Called from nfssvc() to update the exports list. Just call 3161 * vfs_export(). This has to be done, since the v4 root fake fs isn't 3162 * in the mount list. 3163 */ 3164 int 3165 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 3166 { 3167 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 3168 int error = 0; 3169 struct nameidata nd; 3170 fhandle_t fh; 3171 3172 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 3173 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 3174 nfs_rootfhset = 0; 3175 else if (error == 0) { 3176 if (nfsexargp->fspec == NULL) { 3177 error = EPERM; 3178 goto out; 3179 } 3180 /* 3181 * If fspec != NULL, this is the v4root path. 3182 */ 3183 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 3184 nfsexargp->fspec, p); 3185 if ((error = namei(&nd)) != 0) 3186 goto out; 3187 error = nfsvno_getfh(nd.ni_vp, &fh, p); 3188 vrele(nd.ni_vp); 3189 if (!error) { 3190 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 3191 NFSBCOPY((caddr_t)&fh, 3192 nfs_rootfh.nfsrvfh_data, 3193 sizeof (fhandle_t)); 3194 nfs_rootfhset = 1; 3195 } 3196 } 3197 3198 out: 3199 NFSEXITCODE(error); 3200 return (error); 3201 } 3202 3203 /* 3204 * This function needs to test to see if the system is near its limit 3205 * for memory allocation via malloc() or mget() and return True iff 3206 * either of these resources are near their limit. 3207 * XXX (For now, this is just a stub.) 3208 */ 3209 int nfsrv_testmalloclimit = 0; 3210 int 3211 nfsrv_mallocmget_limit(void) 3212 { 3213 static int printmesg = 0; 3214 static int testval = 1; 3215 3216 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 3217 if ((printmesg++ % 100) == 0) 3218 printf("nfsd: malloc/mget near limit\n"); 3219 return (1); 3220 } 3221 return (0); 3222 } 3223 3224 /* 3225 * BSD specific initialization of a mount point. 3226 */ 3227 void 3228 nfsd_mntinit(void) 3229 { 3230 static int inited = 0; 3231 3232 if (inited) 3233 return; 3234 inited = 1; 3235 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 3236 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 3237 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 3238 nfsv4root_mnt.mnt_export = NULL; 3239 TAILQ_INIT(&nfsv4root_opt); 3240 TAILQ_INIT(&nfsv4root_newopt); 3241 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 3242 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 3243 nfsv4root_mnt.mnt_nvnodelistsize = 0; 3244 nfsv4root_mnt.mnt_activevnodelistsize = 0; 3245 } 3246 3247 /* 3248 * Get a vnode for a file handle, without checking exports, etc. 3249 */ 3250 struct vnode * 3251 nfsvno_getvp(fhandle_t *fhp) 3252 { 3253 struct mount *mp; 3254 struct vnode *vp; 3255 int error; 3256 3257 mp = vfs_busyfs(&fhp->fh_fsid); 3258 if (mp == NULL) 3259 return (NULL); 3260 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 3261 vfs_unbusy(mp); 3262 if (error) 3263 return (NULL); 3264 return (vp); 3265 } 3266 3267 /* 3268 * Do a local VOP_ADVLOCK(). 3269 */ 3270 int 3271 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3272 u_int64_t end, struct thread *td) 3273 { 3274 int error = 0; 3275 struct flock fl; 3276 u_int64_t tlen; 3277 3278 if (nfsrv_dolocallocks == 0) 3279 goto out; 3280 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3281 3282 fl.l_whence = SEEK_SET; 3283 fl.l_type = ftype; 3284 fl.l_start = (off_t)first; 3285 if (end == NFS64BITSSET) { 3286 fl.l_len = 0; 3287 } else { 3288 tlen = end - first; 3289 fl.l_len = (off_t)tlen; 3290 } 3291 /* 3292 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3293 * values for all calls, so that all locks will be held by the 3294 * nfsd server. (The nfsd server handles conflicts between the 3295 * various clients.) 3296 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3297 * bytes, so it can't be put in l_sysid. 3298 */ 3299 if (nfsv4_sysid == 0) 3300 nfsv4_sysid = nlm_acquire_next_sysid(); 3301 fl.l_pid = (pid_t)0; 3302 fl.l_sysid = (int)nfsv4_sysid; 3303 3304 if (ftype == F_UNLCK) 3305 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3306 (F_POSIX | F_REMOTE)); 3307 else 3308 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3309 (F_POSIX | F_REMOTE)); 3310 3311 out: 3312 NFSEXITCODE(error); 3313 return (error); 3314 } 3315 3316 /* 3317 * Check the nfsv4 root exports. 3318 */ 3319 int 3320 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3321 { 3322 struct ucred *credanon; 3323 int exflags, error = 0, numsecflavor, *secflavors, i; 3324 3325 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3326 &credanon, &numsecflavor, &secflavors); 3327 if (error) { 3328 error = NFSERR_PROGUNAVAIL; 3329 goto out; 3330 } 3331 if (credanon != NULL) 3332 crfree(credanon); 3333 for (i = 0; i < numsecflavor; i++) { 3334 if (secflavors[i] == AUTH_SYS) 3335 nd->nd_flag |= ND_EXAUTHSYS; 3336 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3337 nd->nd_flag |= ND_EXGSS; 3338 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3339 nd->nd_flag |= ND_EXGSSINTEGRITY; 3340 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3341 nd->nd_flag |= ND_EXGSSPRIVACY; 3342 } 3343 3344 out: 3345 NFSEXITCODE(error); 3346 return (error); 3347 } 3348 3349 /* 3350 * Nfs server pseudo system call for the nfsd's 3351 */ 3352 /* 3353 * MPSAFE 3354 */ 3355 static int 3356 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3357 { 3358 struct file *fp; 3359 struct nfsd_addsock_args sockarg; 3360 struct nfsd_nfsd_args nfsdarg; 3361 struct nfsd_nfsd_oargs onfsdarg; 3362 struct nfsd_pnfsd_args pnfsdarg; 3363 struct vnode *vp, *nvp, *curdvp; 3364 struct pnfsdsfile *pf; 3365 struct nfsdevice *ds, *fds; 3366 cap_rights_t rights; 3367 int buflen, error, ret; 3368 char *buf, *cp, *cp2, *cp3; 3369 char fname[PNFS_FILENAME_LEN + 1]; 3370 3371 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3372 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3373 if (error) 3374 goto out; 3375 /* 3376 * Since we don't know what rights might be required, 3377 * pretend that we need them all. It is better to be too 3378 * careful than too reckless. 3379 */ 3380 error = fget(td, sockarg.sock, 3381 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3382 if (error != 0) 3383 goto out; 3384 if (fp->f_type != DTYPE_SOCKET) { 3385 fdrop(fp, td); 3386 error = EPERM; 3387 goto out; 3388 } 3389 error = nfsrvd_addsock(fp); 3390 fdrop(fp, td); 3391 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3392 if (uap->argp == NULL) { 3393 error = EINVAL; 3394 goto out; 3395 } 3396 if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) { 3397 error = copyin(uap->argp, &onfsdarg, sizeof(onfsdarg)); 3398 if (error == 0) { 3399 nfsdarg.principal = onfsdarg.principal; 3400 nfsdarg.minthreads = onfsdarg.minthreads; 3401 nfsdarg.maxthreads = onfsdarg.maxthreads; 3402 nfsdarg.version = 1; 3403 nfsdarg.addr = NULL; 3404 nfsdarg.addrlen = 0; 3405 nfsdarg.dnshost = NULL; 3406 nfsdarg.dnshostlen = 0; 3407 nfsdarg.dspath = NULL; 3408 nfsdarg.dspathlen = 0; 3409 nfsdarg.mdspath = NULL; 3410 nfsdarg.mdspathlen = 0; 3411 nfsdarg.mirrorcnt = 1; 3412 } 3413 } else 3414 error = copyin(uap->argp, &nfsdarg, sizeof(nfsdarg)); 3415 if (error) 3416 goto out; 3417 if (nfsdarg.addrlen > 0 && nfsdarg.addrlen < 10000 && 3418 nfsdarg.dnshostlen > 0 && nfsdarg.dnshostlen < 10000 && 3419 nfsdarg.dspathlen > 0 && nfsdarg.dspathlen < 10000 && 3420 nfsdarg.mdspathlen > 0 && nfsdarg.mdspathlen < 10000 && 3421 nfsdarg.mirrorcnt >= 1 && 3422 nfsdarg.mirrorcnt <= NFSDEV_MAXMIRRORS && 3423 nfsdarg.addr != NULL && nfsdarg.dnshost != NULL && 3424 nfsdarg.dspath != NULL && nfsdarg.mdspath != NULL) { 3425 NFSD_DEBUG(1, "addrlen=%d dspathlen=%d dnslen=%d" 3426 " mdspathlen=%d mirrorcnt=%d\n", nfsdarg.addrlen, 3427 nfsdarg.dspathlen, nfsdarg.dnshostlen, 3428 nfsdarg.mdspathlen, nfsdarg.mirrorcnt); 3429 cp = malloc(nfsdarg.addrlen + 1, M_TEMP, M_WAITOK); 3430 error = copyin(nfsdarg.addr, cp, nfsdarg.addrlen); 3431 if (error != 0) { 3432 free(cp, M_TEMP); 3433 goto out; 3434 } 3435 cp[nfsdarg.addrlen] = '\0'; /* Ensure nul term. */ 3436 nfsdarg.addr = cp; 3437 cp = malloc(nfsdarg.dnshostlen + 1, M_TEMP, M_WAITOK); 3438 error = copyin(nfsdarg.dnshost, cp, nfsdarg.dnshostlen); 3439 if (error != 0) { 3440 free(nfsdarg.addr, M_TEMP); 3441 free(cp, M_TEMP); 3442 goto out; 3443 } 3444 cp[nfsdarg.dnshostlen] = '\0'; /* Ensure nul term. */ 3445 nfsdarg.dnshost = cp; 3446 cp = malloc(nfsdarg.dspathlen + 1, M_TEMP, M_WAITOK); 3447 error = copyin(nfsdarg.dspath, cp, nfsdarg.dspathlen); 3448 if (error != 0) { 3449 free(nfsdarg.addr, M_TEMP); 3450 free(nfsdarg.dnshost, M_TEMP); 3451 free(cp, M_TEMP); 3452 goto out; 3453 } 3454 cp[nfsdarg.dspathlen] = '\0'; /* Ensure nul term. */ 3455 nfsdarg.dspath = cp; 3456 cp = malloc(nfsdarg.mdspathlen + 1, M_TEMP, M_WAITOK); 3457 error = copyin(nfsdarg.mdspath, cp, nfsdarg.mdspathlen); 3458 if (error != 0) { 3459 free(nfsdarg.addr, M_TEMP); 3460 free(nfsdarg.dnshost, M_TEMP); 3461 free(nfsdarg.dspath, M_TEMP); 3462 free(cp, M_TEMP); 3463 goto out; 3464 } 3465 cp[nfsdarg.mdspathlen] = '\0'; /* Ensure nul term. */ 3466 nfsdarg.mdspath = cp; 3467 } else { 3468 nfsdarg.addr = NULL; 3469 nfsdarg.addrlen = 0; 3470 nfsdarg.dnshost = NULL; 3471 nfsdarg.dnshostlen = 0; 3472 nfsdarg.dspath = NULL; 3473 nfsdarg.dspathlen = 0; 3474 nfsdarg.mdspath = NULL; 3475 nfsdarg.mdspathlen = 0; 3476 nfsdarg.mirrorcnt = 1; 3477 } 3478 error = nfsrvd_nfsd(td, &nfsdarg); 3479 free(nfsdarg.addr, M_TEMP); 3480 free(nfsdarg.dnshost, M_TEMP); 3481 free(nfsdarg.dspath, M_TEMP); 3482 free(nfsdarg.mdspath, M_TEMP); 3483 } else if (uap->flag & NFSSVC_PNFSDS) { 3484 error = copyin(uap->argp, &pnfsdarg, sizeof(pnfsdarg)); 3485 if (error == 0 && (pnfsdarg.op == PNFSDOP_DELDSSERVER || 3486 pnfsdarg.op == PNFSDOP_FORCEDELDS)) { 3487 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3488 error = copyinstr(pnfsdarg.dspath, cp, PATH_MAX + 1, 3489 NULL); 3490 if (error == 0) 3491 error = nfsrv_deldsserver(pnfsdarg.op, cp, td); 3492 free(cp, M_TEMP); 3493 } else if (error == 0 && pnfsdarg.op == PNFSDOP_COPYMR) { 3494 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3495 buflen = sizeof(*pf) * NFSDEV_MAXMIRRORS; 3496 buf = malloc(buflen, M_TEMP, M_WAITOK); 3497 error = copyinstr(pnfsdarg.mdspath, cp, PATH_MAX + 1, 3498 NULL); 3499 NFSD_DEBUG(4, "pnfsdcopymr cp mdspath=%d\n", error); 3500 if (error == 0 && pnfsdarg.dspath != NULL) { 3501 cp2 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3502 error = copyinstr(pnfsdarg.dspath, cp2, 3503 PATH_MAX + 1, NULL); 3504 NFSD_DEBUG(4, "pnfsdcopymr cp dspath=%d\n", 3505 error); 3506 } else 3507 cp2 = NULL; 3508 if (error == 0 && pnfsdarg.curdspath != NULL) { 3509 cp3 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3510 error = copyinstr(pnfsdarg.curdspath, cp3, 3511 PATH_MAX + 1, NULL); 3512 NFSD_DEBUG(4, "pnfsdcopymr cp curdspath=%d\n", 3513 error); 3514 } else 3515 cp3 = NULL; 3516 curdvp = NULL; 3517 fds = NULL; 3518 if (error == 0) 3519 error = nfsrv_mdscopymr(cp, cp2, cp3, buf, 3520 &buflen, fname, td, &vp, &nvp, &pf, &ds, 3521 &fds); 3522 NFSD_DEBUG(4, "nfsrv_mdscopymr=%d\n", error); 3523 if (error == 0) { 3524 if (pf->dsf_dir >= nfsrv_dsdirsize) { 3525 printf("copymr: dsdir out of range\n"); 3526 pf->dsf_dir = 0; 3527 } 3528 NFSD_DEBUG(4, "copymr: buflen=%d\n", buflen); 3529 error = nfsrv_copymr(vp, nvp, 3530 ds->nfsdev_dsdir[pf->dsf_dir], ds, pf, 3531 (struct pnfsdsfile *)buf, 3532 buflen / sizeof(*pf), td->td_ucred, td); 3533 vput(vp); 3534 vput(nvp); 3535 if (fds != NULL && error == 0) { 3536 curdvp = fds->nfsdev_dsdir[pf->dsf_dir]; 3537 ret = vn_lock(curdvp, LK_EXCLUSIVE); 3538 if (ret == 0) { 3539 nfsrv_dsremove(curdvp, fname, 3540 td->td_ucred, td); 3541 NFSVOPUNLOCK(curdvp, 0); 3542 } 3543 } 3544 NFSD_DEBUG(4, "nfsrv_copymr=%d\n", error); 3545 } 3546 free(cp, M_TEMP); 3547 free(cp2, M_TEMP); 3548 free(cp3, M_TEMP); 3549 free(buf, M_TEMP); 3550 } 3551 } else { 3552 error = nfssvc_srvcall(td, uap, td->td_ucred); 3553 } 3554 3555 out: 3556 NFSEXITCODE(error); 3557 return (error); 3558 } 3559 3560 static int 3561 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3562 { 3563 struct nfsex_args export; 3564 struct file *fp = NULL; 3565 int stablefd, len; 3566 struct nfsd_clid adminrevoke; 3567 struct nfsd_dumplist dumplist; 3568 struct nfsd_dumpclients *dumpclients; 3569 struct nfsd_dumplocklist dumplocklist; 3570 struct nfsd_dumplocks *dumplocks; 3571 struct nameidata nd; 3572 vnode_t vp; 3573 int error = EINVAL, igotlock; 3574 struct proc *procp; 3575 static int suspend_nfsd = 0; 3576 3577 if (uap->flag & NFSSVC_PUBLICFH) { 3578 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3579 sizeof (fhandle_t)); 3580 error = copyin(uap->argp, 3581 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3582 if (!error) 3583 nfs_pubfhset = 1; 3584 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3585 error = copyin(uap->argp,(caddr_t)&export, 3586 sizeof (struct nfsex_args)); 3587 if (!error) 3588 error = nfsrv_v4rootexport(&export, cred, p); 3589 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3590 nfs_pubfhset = 0; 3591 error = 0; 3592 } else if (uap->flag & NFSSVC_STABLERESTART) { 3593 error = copyin(uap->argp, (caddr_t)&stablefd, 3594 sizeof (int)); 3595 if (!error) 3596 error = fp_getfvp(p, stablefd, &fp, &vp); 3597 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3598 error = EBADF; 3599 if (!error && newnfs_numnfsd != 0) 3600 error = EPERM; 3601 if (!error) { 3602 nfsrv_stablefirst.nsf_fp = fp; 3603 nfsrv_setupstable(p); 3604 } 3605 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3606 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3607 sizeof (struct nfsd_clid)); 3608 if (!error) 3609 error = nfsrv_adminrevoke(&adminrevoke, p); 3610 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3611 error = copyin(uap->argp, (caddr_t)&dumplist, 3612 sizeof (struct nfsd_dumplist)); 3613 if (!error && (dumplist.ndl_size < 1 || 3614 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3615 error = EPERM; 3616 if (!error) { 3617 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3618 dumpclients = (struct nfsd_dumpclients *)malloc(len, 3619 M_TEMP, M_WAITOK); 3620 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3621 error = copyout(dumpclients, 3622 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3623 free(dumpclients, M_TEMP); 3624 } 3625 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3626 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3627 sizeof (struct nfsd_dumplocklist)); 3628 if (!error && (dumplocklist.ndllck_size < 1 || 3629 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3630 error = EPERM; 3631 if (!error) 3632 error = nfsrv_lookupfilename(&nd, 3633 dumplocklist.ndllck_fname, p); 3634 if (!error) { 3635 len = sizeof (struct nfsd_dumplocks) * 3636 dumplocklist.ndllck_size; 3637 dumplocks = (struct nfsd_dumplocks *)malloc(len, 3638 M_TEMP, M_WAITOK); 3639 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3640 dumplocklist.ndllck_size, p); 3641 vput(nd.ni_vp); 3642 error = copyout(dumplocks, 3643 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3644 free(dumplocks, M_TEMP); 3645 } 3646 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3647 procp = p->td_proc; 3648 PROC_LOCK(procp); 3649 nfsd_master_pid = procp->p_pid; 3650 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3651 nfsd_master_start = procp->p_stats->p_start; 3652 nfsd_master_proc = procp; 3653 PROC_UNLOCK(procp); 3654 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3655 NFSLOCKV4ROOTMUTEX(); 3656 if (suspend_nfsd == 0) { 3657 /* Lock out all nfsd threads */ 3658 do { 3659 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3660 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3661 } while (igotlock == 0 && suspend_nfsd == 0); 3662 suspend_nfsd = 1; 3663 } 3664 NFSUNLOCKV4ROOTMUTEX(); 3665 error = 0; 3666 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3667 NFSLOCKV4ROOTMUTEX(); 3668 if (suspend_nfsd != 0) { 3669 nfsv4_unlock(&nfsd_suspend_lock, 0); 3670 suspend_nfsd = 0; 3671 } 3672 NFSUNLOCKV4ROOTMUTEX(); 3673 error = 0; 3674 } 3675 3676 NFSEXITCODE(error); 3677 return (error); 3678 } 3679 3680 /* 3681 * Check exports. 3682 * Returns 0 if ok, 1 otherwise. 3683 */ 3684 int 3685 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3686 { 3687 int i; 3688 3689 /* 3690 * This seems odd, but allow the case where the security flavor 3691 * list is empty. This happens when NFSv4 is traversing non-exported 3692 * file systems. Exported file systems should always have a non-empty 3693 * security flavor list. 3694 */ 3695 if (exp->nes_numsecflavor == 0) 3696 return (0); 3697 3698 for (i = 0; i < exp->nes_numsecflavor; i++) { 3699 /* 3700 * The tests for privacy and integrity must be first, 3701 * since ND_GSS is set for everything but AUTH_SYS. 3702 */ 3703 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3704 (nd->nd_flag & ND_GSSPRIVACY)) 3705 return (0); 3706 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3707 (nd->nd_flag & ND_GSSINTEGRITY)) 3708 return (0); 3709 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3710 (nd->nd_flag & ND_GSS)) 3711 return (0); 3712 if (exp->nes_secflavors[i] == AUTH_SYS && 3713 (nd->nd_flag & ND_GSS) == 0) 3714 return (0); 3715 } 3716 return (1); 3717 } 3718 3719 /* 3720 * Calculate a hash value for the fid in a file handle. 3721 */ 3722 uint32_t 3723 nfsrv_hashfh(fhandle_t *fhp) 3724 { 3725 uint32_t hashval; 3726 3727 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3728 return (hashval); 3729 } 3730 3731 /* 3732 * Calculate a hash value for the sessionid. 3733 */ 3734 uint32_t 3735 nfsrv_hashsessionid(uint8_t *sessionid) 3736 { 3737 uint32_t hashval; 3738 3739 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3740 return (hashval); 3741 } 3742 3743 /* 3744 * Signal the userland master nfsd to backup the stable restart file. 3745 */ 3746 void 3747 nfsrv_backupstable(void) 3748 { 3749 struct proc *procp; 3750 3751 if (nfsd_master_proc != NULL) { 3752 procp = pfind(nfsd_master_pid); 3753 /* Try to make sure it is the correct process. */ 3754 if (procp == nfsd_master_proc && 3755 procp->p_stats->p_start.tv_sec == 3756 nfsd_master_start.tv_sec && 3757 procp->p_stats->p_start.tv_usec == 3758 nfsd_master_start.tv_usec && 3759 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3760 kern_psignal(procp, SIGUSR2); 3761 else 3762 nfsd_master_proc = NULL; 3763 3764 if (procp != NULL) 3765 PROC_UNLOCK(procp); 3766 } 3767 } 3768 3769 /* 3770 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 3771 * The arguments are in a structure, so that they can be passed through 3772 * taskqueue for a kernel process to execute this function. 3773 */ 3774 struct nfsrvdscreate { 3775 int done; 3776 int inprog; 3777 struct task tsk; 3778 struct ucred *tcred; 3779 struct vnode *dvp; 3780 NFSPROC_T *p; 3781 struct pnfsdsfile *pf; 3782 int err; 3783 fhandle_t fh; 3784 struct vattr va; 3785 struct vattr createva; 3786 }; 3787 3788 int 3789 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 3790 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 3791 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 3792 { 3793 struct vnode *nvp; 3794 struct nameidata named; 3795 struct vattr va; 3796 char *bufp; 3797 u_long *hashp; 3798 struct nfsnode *np; 3799 struct nfsmount *nmp; 3800 int error; 3801 3802 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 3803 LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE); 3804 nfsvno_setpathbuf(&named, &bufp, &hashp); 3805 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 3806 named.ni_cnd.cn_thread = p; 3807 named.ni_cnd.cn_nameptr = bufp; 3808 if (fnamep != NULL) { 3809 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 3810 named.ni_cnd.cn_namelen = strlen(bufp); 3811 } else 3812 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 3813 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 3814 3815 /* Create the date file in the DS mount. */ 3816 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 3817 if (error == 0) { 3818 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 3819 NFSVOPUNLOCK(dvp, 0); 3820 if (error == 0) { 3821 /* Set the ownership of the file. */ 3822 error = VOP_SETATTR(nvp, nvap, tcred); 3823 NFSD_DEBUG(4, "nfsrv_dscreate:" 3824 " setattr-uid=%d\n", error); 3825 if (error != 0) 3826 vput(nvp); 3827 } 3828 if (error != 0) 3829 printf("pNFS: pnfscreate failed=%d\n", error); 3830 } else 3831 printf("pNFS: pnfscreate vnlock=%d\n", error); 3832 if (error == 0) { 3833 np = VTONFS(nvp); 3834 nmp = VFSTONFS(nvp->v_mount); 3835 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 3836 != 0 || nmp->nm_nam->sa_len > sizeof( 3837 struct sockaddr_in6) || 3838 np->n_fhp->nfh_len != NFSX_MYFH) { 3839 printf("Bad DS file: fstype=%s salen=%d" 3840 " fhlen=%d\n", 3841 nvp->v_mount->mnt_vfc->vfc_name, 3842 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 3843 error = ENOENT; 3844 } 3845 3846 /* Set extattrs for the DS on the MDS file. */ 3847 if (error == 0) { 3848 if (dsa != NULL) { 3849 error = VOP_GETATTR(nvp, &va, tcred); 3850 if (error == 0) { 3851 dsa->dsa_filerev = va.va_filerev; 3852 dsa->dsa_size = va.va_size; 3853 dsa->dsa_atime = va.va_atime; 3854 dsa->dsa_mtime = va.va_mtime; 3855 } 3856 } 3857 if (error == 0) { 3858 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 3859 NFSX_MYFH); 3860 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 3861 nmp->nm_nam->sa_len); 3862 NFSBCOPY(named.ni_cnd.cn_nameptr, 3863 pf->dsf_filename, 3864 sizeof(pf->dsf_filename)); 3865 } 3866 } else 3867 printf("pNFS: pnfscreate can't get DS" 3868 " attr=%d\n", error); 3869 if (nvpp != NULL && error == 0) 3870 *nvpp = nvp; 3871 else 3872 vput(nvp); 3873 } 3874 nfsvno_relpathbuf(&named); 3875 return (error); 3876 } 3877 3878 /* 3879 * Start up the thread that will execute nfsrv_dscreate(). 3880 */ 3881 static void 3882 start_dscreate(void *arg, int pending) 3883 { 3884 struct nfsrvdscreate *dsc; 3885 3886 dsc = (struct nfsrvdscreate *)arg; 3887 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 3888 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 3889 dsc->done = 1; 3890 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 3891 } 3892 3893 /* 3894 * Create a pNFS data file on the Data Server(s). 3895 */ 3896 static void 3897 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 3898 NFSPROC_T *p) 3899 { 3900 struct nfsrvdscreate *dsc, *tdsc; 3901 struct nfsdevice *ds, *tds, *fds; 3902 struct mount *mp; 3903 struct pnfsdsfile *pf, *tpf; 3904 struct pnfsdsattr dsattr; 3905 struct vattr va; 3906 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 3907 struct nfsmount *nmp; 3908 fhandle_t fh; 3909 uid_t vauid; 3910 gid_t vagid; 3911 u_short vamode; 3912 struct ucred *tcred; 3913 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 3914 int failpos, timo; 3915 3916 /* Get a DS server directory in a round-robin order. */ 3917 mirrorcnt = 1; 3918 mp = vp->v_mount; 3919 ds = fds = NULL; 3920 NFSDDSLOCK(); 3921 /* 3922 * Search for the first entry that handles this MDS fs, but use the 3923 * first entry for all MDS fs's otherwise. 3924 */ 3925 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 3926 if (tds->nfsdev_nmp != NULL) { 3927 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 3928 ds = tds; 3929 else if (tds->nfsdev_mdsisset != 0 && 3930 mp->mnt_stat.f_fsid.val[0] == 3931 tds->nfsdev_mdsfsid.val[0] && 3932 mp->mnt_stat.f_fsid.val[1] == 3933 tds->nfsdev_mdsfsid.val[1]) { 3934 ds = fds = tds; 3935 break; 3936 } 3937 } 3938 } 3939 if (ds == NULL) { 3940 NFSDDSUNLOCK(); 3941 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 3942 return; 3943 } 3944 i = dsdir[0] = ds->nfsdev_nextdir; 3945 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 3946 dvp[0] = ds->nfsdev_dsdir[i]; 3947 tds = TAILQ_NEXT(ds, nfsdev_list); 3948 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 3949 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 3950 if (tds->nfsdev_nmp != NULL && 3951 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 3952 (tds->nfsdev_mdsisset != 0 && fds != NULL && 3953 mp->mnt_stat.f_fsid.val[0] == 3954 tds->nfsdev_mdsfsid.val[0] && 3955 mp->mnt_stat.f_fsid.val[1] == 3956 tds->nfsdev_mdsfsid.val[1]))) { 3957 dsdir[mirrorcnt] = i; 3958 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 3959 mirrorcnt++; 3960 if (mirrorcnt >= nfsrv_maxpnfsmirror) 3961 break; 3962 } 3963 } 3964 } 3965 /* Put at end of list to implement round-robin usage. */ 3966 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 3967 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 3968 NFSDDSUNLOCK(); 3969 dsc = NULL; 3970 if (mirrorcnt > 1) 3971 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 3972 M_WAITOK | M_ZERO); 3973 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 3974 M_ZERO); 3975 3976 error = nfsvno_getfh(vp, &fh, p); 3977 if (error == 0) 3978 error = VOP_GETATTR(vp, &va, cred); 3979 if (error == 0) { 3980 /* Set the attributes for "vp" to Setattr the DS vp. */ 3981 vauid = va.va_uid; 3982 vagid = va.va_gid; 3983 vamode = va.va_mode; 3984 VATTR_NULL(&va); 3985 va.va_uid = vauid; 3986 va.va_gid = vagid; 3987 va.va_mode = vamode; 3988 va.va_size = 0; 3989 } else 3990 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 3991 3992 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 3993 cred->cr_gid); 3994 /* Make data file name based on FH. */ 3995 tcred = newnfs_getcred(); 3996 3997 /* 3998 * Create the file on each DS mirror, using kernel process(es) for the 3999 * additional mirrors. 4000 */ 4001 failpos = -1; 4002 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 4003 tpf->dsf_dir = dsdir[i]; 4004 tdsc->tcred = tcred; 4005 tdsc->p = p; 4006 tdsc->pf = tpf; 4007 tdsc->createva = *vap; 4008 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 4009 tdsc->va = va; 4010 tdsc->dvp = dvp[i]; 4011 tdsc->done = 0; 4012 tdsc->inprog = 0; 4013 tdsc->err = 0; 4014 ret = EIO; 4015 if (nfs_pnfsiothreads != 0) { 4016 ret = nfs_pnfsio(start_dscreate, tdsc); 4017 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 4018 } 4019 if (ret != 0) { 4020 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 4021 NULL, tcred, p, NULL); 4022 if (ret != 0) { 4023 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 4024 error)); 4025 if (failpos == -1 && nfsds_failerr(ret)) 4026 failpos = i; 4027 else 4028 error = ret; 4029 } 4030 } 4031 } 4032 if (error == 0) { 4033 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4034 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4035 &dsattr, NULL, tcred, p, NULL); 4036 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4037 failpos = mirrorcnt - 1; 4038 error = 0; 4039 } 4040 } 4041 timo = hz / 50; /* Wait for 20msec. */ 4042 if (timo < 1) 4043 timo = 1; 4044 /* Wait for kernel task(s) to complete. */ 4045 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4046 while (tdsc->inprog != 0 && tdsc->done == 0) 4047 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4048 if (tdsc->err != 0) { 4049 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4050 failpos = i; 4051 else if (error == 0) 4052 error = tdsc->err; 4053 } 4054 } 4055 4056 /* 4057 * If failpos has been set, that mirror has failed, so it needs 4058 * to be disabled. 4059 */ 4060 if (failpos >= 0) { 4061 nmp = VFSTONFS(dvp[failpos]->v_mount); 4062 NFSLOCKMNT(nmp); 4063 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4064 NFSMNTP_CANCELRPCS)) == 0) { 4065 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4066 NFSUNLOCKMNT(nmp); 4067 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4068 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4069 ds); 4070 if (ds != NULL) 4071 nfsrv_killrpcs(nmp); 4072 NFSLOCKMNT(nmp); 4073 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4074 wakeup(nmp); 4075 } 4076 NFSUNLOCKMNT(nmp); 4077 } 4078 4079 NFSFREECRED(tcred); 4080 if (error == 0) { 4081 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4082 4083 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4084 mirrorcnt, nfsrv_maxpnfsmirror); 4085 /* 4086 * For all mirrors that couldn't be created, fill in the 4087 * *pf structure, but with an IP address == 0.0.0.0. 4088 */ 4089 tpf = pf + mirrorcnt; 4090 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4091 *tpf = *pf; 4092 tpf->dsf_sin.sin_family = AF_INET; 4093 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4094 tpf->dsf_sin.sin_addr.s_addr = 0; 4095 tpf->dsf_sin.sin_port = 0; 4096 } 4097 4098 error = vn_extattr_set(vp, IO_NODELOCKED, 4099 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4100 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4101 if (error == 0) 4102 error = vn_extattr_set(vp, IO_NODELOCKED, 4103 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4104 sizeof(dsattr), (char *)&dsattr, p); 4105 if (error != 0) 4106 printf("pNFS: pnfscreate setextattr=%d\n", 4107 error); 4108 } else 4109 printf("pNFS: pnfscreate=%d\n", error); 4110 free(pf, M_TEMP); 4111 free(dsc, M_TEMP); 4112 } 4113 4114 /* 4115 * Get the information needed to remove the pNFS Data Server file from the 4116 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4117 * DS directory vnode. The caller must unlock *ddvp when done with it. 4118 */ 4119 static void 4120 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4121 int *mirrorcntp, char *fname, fhandle_t *fhp) 4122 { 4123 struct vattr va; 4124 struct ucred *tcred; 4125 char *buf; 4126 int buflen, error; 4127 4128 dvpp[0] = NULL; 4129 /* If not an exported regular file or not a pNFS server, just return. */ 4130 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4131 nfsrv_devidcnt == 0) 4132 return; 4133 4134 /* Check to see if this is the last hard link. */ 4135 tcred = newnfs_getcred(); 4136 error = VOP_GETATTR(vp, &va, tcred); 4137 NFSFREECRED(tcred); 4138 if (error != 0) { 4139 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4140 return; 4141 } 4142 if (va.va_nlink > 1) 4143 return; 4144 4145 error = nfsvno_getfh(vp, fhp, p); 4146 if (error != 0) { 4147 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4148 return; 4149 } 4150 4151 buflen = 1024; 4152 buf = malloc(buflen, M_TEMP, M_WAITOK); 4153 /* Get the directory vnode for the DS mount and the file handle. */ 4154 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4155 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4156 free(buf, M_TEMP); 4157 if (error != 0) 4158 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4159 } 4160 4161 /* 4162 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4163 * The arguments are in a structure, so that they can be passed through 4164 * taskqueue for a kernel process to execute this function. 4165 */ 4166 struct nfsrvdsremove { 4167 int done; 4168 int inprog; 4169 struct task tsk; 4170 struct ucred *tcred; 4171 struct vnode *dvp; 4172 NFSPROC_T *p; 4173 int err; 4174 char fname[PNFS_FILENAME_LEN + 1]; 4175 }; 4176 4177 static int 4178 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4179 NFSPROC_T *p) 4180 { 4181 struct nameidata named; 4182 struct vnode *nvp; 4183 char *bufp; 4184 u_long *hashp; 4185 int error; 4186 4187 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4188 if (error != 0) 4189 return (error); 4190 named.ni_cnd.cn_nameiop = DELETE; 4191 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4192 named.ni_cnd.cn_cred = tcred; 4193 named.ni_cnd.cn_thread = p; 4194 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 4195 nfsvno_setpathbuf(&named, &bufp, &hashp); 4196 named.ni_cnd.cn_nameptr = bufp; 4197 named.ni_cnd.cn_namelen = strlen(fname); 4198 strlcpy(bufp, fname, NAME_MAX); 4199 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4200 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4201 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4202 if (error == 0) { 4203 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4204 vput(nvp); 4205 } 4206 NFSVOPUNLOCK(dvp, 0); 4207 nfsvno_relpathbuf(&named); 4208 if (error != 0) 4209 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4210 return (error); 4211 } 4212 4213 /* 4214 * Start up the thread that will execute nfsrv_dsremove(). 4215 */ 4216 static void 4217 start_dsremove(void *arg, int pending) 4218 { 4219 struct nfsrvdsremove *dsrm; 4220 4221 dsrm = (struct nfsrvdsremove *)arg; 4222 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4223 dsrm->p); 4224 dsrm->done = 1; 4225 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4226 } 4227 4228 /* 4229 * Remove a pNFS data file from a Data Server. 4230 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4231 * removed to set up the dvp and fill in the FH. 4232 */ 4233 static void 4234 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4235 NFSPROC_T *p) 4236 { 4237 struct ucred *tcred; 4238 struct nfsrvdsremove *dsrm, *tdsrm; 4239 struct nfsdevice *ds; 4240 struct nfsmount *nmp; 4241 int failpos, i, ret, timo; 4242 4243 tcred = newnfs_getcred(); 4244 dsrm = NULL; 4245 if (mirrorcnt > 1) 4246 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4247 /* 4248 * Remove the file on each DS mirror, using kernel process(es) for the 4249 * additional mirrors. 4250 */ 4251 failpos = -1; 4252 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4253 tdsrm->tcred = tcred; 4254 tdsrm->p = p; 4255 tdsrm->dvp = dvp[i]; 4256 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4257 tdsrm->inprog = 0; 4258 tdsrm->done = 0; 4259 tdsrm->err = 0; 4260 ret = EIO; 4261 if (nfs_pnfsiothreads != 0) { 4262 ret = nfs_pnfsio(start_dsremove, tdsrm); 4263 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4264 } 4265 if (ret != 0) { 4266 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4267 if (failpos == -1 && nfsds_failerr(ret)) 4268 failpos = i; 4269 } 4270 } 4271 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4272 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4273 failpos = mirrorcnt - 1; 4274 timo = hz / 50; /* Wait for 20msec. */ 4275 if (timo < 1) 4276 timo = 1; 4277 /* Wait for kernel task(s) to complete. */ 4278 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4279 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4280 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4281 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4282 failpos = i; 4283 } 4284 4285 /* 4286 * If failpos has been set, that mirror has failed, so it needs 4287 * to be disabled. 4288 */ 4289 if (failpos >= 0) { 4290 nmp = VFSTONFS(dvp[failpos]->v_mount); 4291 NFSLOCKMNT(nmp); 4292 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4293 NFSMNTP_CANCELRPCS)) == 0) { 4294 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4295 NFSUNLOCKMNT(nmp); 4296 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4297 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4298 ds); 4299 if (ds != NULL) 4300 nfsrv_killrpcs(nmp); 4301 NFSLOCKMNT(nmp); 4302 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4303 wakeup(nmp); 4304 } 4305 NFSUNLOCKMNT(nmp); 4306 } 4307 4308 /* Get rid all layouts for the file. */ 4309 nfsrv_freefilelayouts(fhp); 4310 4311 NFSFREECRED(tcred); 4312 free(dsrm, M_TEMP); 4313 } 4314 4315 /* 4316 * Generate a file name based on the file handle and put it in *bufp. 4317 * Return the number of bytes generated. 4318 */ 4319 static int 4320 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4321 { 4322 int i; 4323 uint8_t *cp; 4324 const uint8_t *hexdigits = "0123456789abcdef"; 4325 4326 cp = (uint8_t *)fhp; 4327 for (i = 0; i < sizeof(*fhp); i++) { 4328 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4329 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4330 } 4331 bufp[2 * i] = '\0'; 4332 return (2 * i); 4333 } 4334 4335 /* 4336 * Update the Metadata file's attributes from the DS file when a Read/Write 4337 * layout is returned. 4338 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4339 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4340 */ 4341 int 4342 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4343 { 4344 struct ucred *tcred; 4345 int error; 4346 4347 /* Do this as root so that it won't fail with EACCES. */ 4348 tcred = newnfs_getcred(); 4349 error = nfsrv_proxyds(NULL, vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4350 NULL, NULL, NULL, nap, NULL); 4351 NFSFREECRED(tcred); 4352 return (error); 4353 } 4354 4355 /* 4356 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4357 */ 4358 static int 4359 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4360 NFSPROC_T *p) 4361 { 4362 int error; 4363 4364 error = nfsrv_proxyds(NULL, vp, 0, 0, cred, p, NFSPROC_SETACL, 4365 NULL, NULL, NULL, NULL, aclp); 4366 return (error); 4367 } 4368 4369 static int 4370 nfsrv_proxyds(struct nfsrv_descript *nd, struct vnode *vp, off_t off, int cnt, 4371 struct ucred *cred, struct thread *p, int ioproc, struct mbuf **mpp, 4372 char *cp, struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp) 4373 { 4374 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4375 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4376 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4377 struct nfsdevice *ds; 4378 struct pnfsdsattr dsattr; 4379 char *buf; 4380 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4381 4382 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4383 /* 4384 * If not a regular file, not exported or not a pNFS server, 4385 * just return ENOENT. 4386 */ 4387 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4388 nfsrv_devidcnt == 0) 4389 return (ENOENT); 4390 4391 buflen = 1024; 4392 buf = malloc(buflen, M_TEMP, M_WAITOK); 4393 error = 0; 4394 4395 /* 4396 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4397 * from the MetaData file's extended attribute. 4398 */ 4399 if (ioproc == NFSPROC_GETATTR) { 4400 error = vn_extattr_get(vp, IO_NODELOCKED, 4401 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4402 p); 4403 if (error == 0 && buflen != sizeof(dsattr)) 4404 error = ENXIO; 4405 if (error == 0) { 4406 NFSBCOPY(buf, &dsattr, buflen); 4407 nap->na_filerev = dsattr.dsa_filerev; 4408 nap->na_size = dsattr.dsa_size; 4409 nap->na_atime = dsattr.dsa_atime; 4410 nap->na_mtime = dsattr.dsa_mtime; 4411 4412 /* 4413 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4414 * returns 0, just return now. nfsrv_checkdsattr() 4415 * returns 0 if there is no Read/Write layout 4416 * plus either an Open/Write_access or Write 4417 * delegation issued to a client for the file. 4418 */ 4419 if (nfsrv_pnfsgetdsattr == 0 || 4420 nfsrv_checkdsattr(nd, vp, p) == 0) { 4421 free(buf, M_TEMP); 4422 return (error); 4423 } 4424 } 4425 4426 /* 4427 * Clear ENOATTR so the code below will attempt to do a 4428 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4429 * the extended attribute. 4430 */ 4431 if (error == ENOATTR) 4432 error = 0; 4433 } 4434 4435 origmircnt = -1; 4436 trycnt = 0; 4437 tryagain: 4438 if (error == 0) { 4439 buflen = 1024; 4440 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4441 LK_EXCLUSIVE) 4442 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4443 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4444 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4445 NULL, NULL); 4446 if (error == 0) { 4447 for (i = 0; i < mirrorcnt; i++) 4448 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4449 } else 4450 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4451 } else 4452 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4453 if (error == 0) { 4454 failpos = -1; 4455 if (origmircnt == -1) 4456 origmircnt = mirrorcnt; 4457 /* 4458 * If failpos is set to a mirror#, then that mirror has 4459 * failed and will be disabled. For Read and Getattr, the 4460 * function only tries one mirror, so if that mirror has 4461 * failed, it will need to be retried. As such, increment 4462 * tryitagain for these cases. 4463 * For Write, Setattr and Setacl, the function tries all 4464 * mirrors and will not return an error for the case where 4465 * one mirror has failed. For these cases, the functioning 4466 * mirror(s) will have been modified, so a retry isn't 4467 * necessary. These functions will set failpos for the 4468 * failed mirror#. 4469 */ 4470 if (ioproc == NFSPROC_READDS) { 4471 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4472 mpp, mpp2); 4473 if (nfsds_failerr(error) && mirrorcnt > 1) { 4474 /* 4475 * Setting failpos will cause the mirror 4476 * to be disabled and then a retry of this 4477 * read is required. 4478 */ 4479 failpos = 0; 4480 error = 0; 4481 trycnt++; 4482 } 4483 } else if (ioproc == NFSPROC_WRITEDS) 4484 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4485 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4486 else if (ioproc == NFSPROC_SETATTR) 4487 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4488 mirrorcnt, nap, &failpos); 4489 else if (ioproc == NFSPROC_SETACL) 4490 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4491 mirrorcnt, aclp, &failpos); 4492 else { 4493 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4494 vp, nmp[mirrorcnt - 1], nap); 4495 if (nfsds_failerr(error) && mirrorcnt > 1) { 4496 /* 4497 * Setting failpos will cause the mirror 4498 * to be disabled and then a retry of this 4499 * getattr is required. 4500 */ 4501 failpos = mirrorcnt - 1; 4502 error = 0; 4503 trycnt++; 4504 } 4505 } 4506 ds = NULL; 4507 if (failpos >= 0) { 4508 failnmp = nmp[failpos]; 4509 NFSLOCKMNT(failnmp); 4510 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4511 NFSMNTP_CANCELRPCS)) == 0) { 4512 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4513 NFSUNLOCKMNT(failnmp); 4514 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4515 failnmp, p); 4516 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4517 failpos, ds); 4518 if (ds != NULL) 4519 nfsrv_killrpcs(failnmp); 4520 NFSLOCKMNT(failnmp); 4521 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4522 wakeup(failnmp); 4523 } 4524 NFSUNLOCKMNT(failnmp); 4525 } 4526 for (i = 0; i < mirrorcnt; i++) 4527 NFSVOPUNLOCK(dvp[i], 0); 4528 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4529 trycnt); 4530 /* Try the Read/Getattr again if a mirror was deleted. */ 4531 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4532 goto tryagain; 4533 } else { 4534 /* Return ENOENT for any Extended Attribute error. */ 4535 error = ENOENT; 4536 } 4537 free(buf, M_TEMP); 4538 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4539 return (error); 4540 } 4541 4542 /* 4543 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4544 * attribute. 4545 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4546 * to be checked. If it points to a NULL nmp, then it returns 4547 * a suitable destination. 4548 * curnmp - If non-NULL, it is the source mount for the copy. 4549 */ 4550 int 4551 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4552 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4553 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4554 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4555 { 4556 struct vnode *dvp, *nvp, **tdvpp; 4557 struct mount *mp; 4558 struct nfsmount *nmp, *newnmp; 4559 struct sockaddr *sad; 4560 struct sockaddr_in *sin; 4561 struct nfsdevice *ds, *tds, *fndds; 4562 struct pnfsdsfile *pf; 4563 uint32_t dsdir; 4564 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4565 4566 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4567 *mirrorcntp = 1; 4568 tdvpp = dvpp; 4569 if (nvpp != NULL) 4570 *nvpp = NULL; 4571 if (dvpp != NULL) 4572 *dvpp = NULL; 4573 if (ippos != NULL) 4574 *ippos = -1; 4575 if (newnmpp != NULL) 4576 newnmp = *newnmpp; 4577 else 4578 newnmp = NULL; 4579 mp = vp->v_mount; 4580 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4581 "pnfsd.dsfile", buflenp, buf, p); 4582 mirrorcnt = *buflenp / sizeof(*pf); 4583 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4584 *buflenp != sizeof(*pf) * mirrorcnt)) 4585 error = ENOATTR; 4586 4587 pf = (struct pnfsdsfile *)buf; 4588 /* If curnmp != NULL, check for a match in the mirror list. */ 4589 if (curnmp != NULL && error == 0) { 4590 fnd = 0; 4591 for (i = 0; i < mirrorcnt; i++, pf++) { 4592 sad = (struct sockaddr *)&pf->dsf_sin; 4593 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 4594 if (ippos != NULL) 4595 *ippos = i; 4596 fnd = 1; 4597 break; 4598 } 4599 } 4600 if (fnd == 0) 4601 error = ENXIO; 4602 } 4603 4604 gotone = 0; 4605 pf = (struct pnfsdsfile *)buf; 4606 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 4607 error); 4608 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 4609 fhiszero = 0; 4610 sad = (struct sockaddr *)&pf->dsf_sin; 4611 sin = &pf->dsf_sin; 4612 dsdir = pf->dsf_dir; 4613 if (dsdir >= nfsrv_dsdirsize) { 4614 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 4615 error = ENOATTR; 4616 } else if (nvpp != NULL && newnmp != NULL && 4617 nfsaddr2_match(sad, newnmp->nm_nam)) 4618 error = EEXIST; 4619 if (error == 0) { 4620 if (ippos != NULL && curnmp == NULL && 4621 sad->sa_family == AF_INET && 4622 sin->sin_addr.s_addr == 0) 4623 *ippos = i; 4624 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 4625 fhiszero = 1; 4626 /* Use the socket address to find the mount point. */ 4627 fndds = NULL; 4628 NFSDDSLOCK(); 4629 /* Find a match for the IP address. */ 4630 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 4631 if (ds->nfsdev_nmp != NULL) { 4632 dvp = ds->nfsdev_dvp; 4633 nmp = VFSTONFS(dvp->v_mount); 4634 if (nmp != ds->nfsdev_nmp) 4635 printf("different2 nmp %p %p\n", 4636 nmp, ds->nfsdev_nmp); 4637 if (nfsaddr2_match(sad, nmp->nm_nam)) { 4638 fndds = ds; 4639 break; 4640 } 4641 } 4642 } 4643 if (fndds != NULL && newnmpp != NULL && 4644 newnmp == NULL) { 4645 /* Search for a place to make a mirror copy. */ 4646 TAILQ_FOREACH(tds, &nfsrv_devidhead, 4647 nfsdev_list) { 4648 if (tds->nfsdev_nmp != NULL && 4649 fndds != tds && 4650 ((tds->nfsdev_mdsisset == 0 && 4651 fndds->nfsdev_mdsisset == 0) || 4652 (tds->nfsdev_mdsisset != 0 && 4653 fndds->nfsdev_mdsisset != 0 && 4654 tds->nfsdev_mdsfsid.val[0] == 4655 mp->mnt_stat.f_fsid.val[0] && 4656 tds->nfsdev_mdsfsid.val[1] == 4657 mp->mnt_stat.f_fsid.val[1]))) { 4658 *newnmpp = tds->nfsdev_nmp; 4659 break; 4660 } 4661 } 4662 if (tds != NULL) { 4663 /* 4664 * Move this entry to the end of the 4665 * list, so it won't be selected as 4666 * easily the next time. 4667 */ 4668 TAILQ_REMOVE(&nfsrv_devidhead, tds, 4669 nfsdev_list); 4670 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 4671 nfsdev_list); 4672 } 4673 } 4674 NFSDDSUNLOCK(); 4675 if (fndds != NULL) { 4676 dvp = fndds->nfsdev_dsdir[dsdir]; 4677 if (lktype != 0 || fhiszero != 0 || 4678 (nvpp != NULL && *nvpp == NULL)) { 4679 if (fhiszero != 0) 4680 error = vn_lock(dvp, 4681 LK_EXCLUSIVE); 4682 else if (lktype != 0) 4683 error = vn_lock(dvp, lktype); 4684 else 4685 error = vn_lock(dvp, LK_SHARED); 4686 /* 4687 * If the file handle is all 0's, try to 4688 * do a Lookup against the DS to acquire 4689 * it. 4690 * If dvpp == NULL or the Lookup fails, 4691 * unlock dvp after the call. 4692 */ 4693 if (error == 0 && (fhiszero != 0 || 4694 (nvpp != NULL && *nvpp == NULL))) { 4695 error = nfsrv_pnfslookupds(vp, 4696 dvp, pf, &nvp, p); 4697 if (error == 0) { 4698 if (fhiszero != 0) 4699 nfsrv_pnfssetfh( 4700 vp, pf, 4701 devid, 4702 fnamep, 4703 nvp, p); 4704 if (nvpp != NULL && 4705 *nvpp == NULL) { 4706 *nvpp = nvp; 4707 *dsdirp = dsdir; 4708 } else 4709 vput(nvp); 4710 } 4711 if (error != 0 || lktype == 0) 4712 NFSVOPUNLOCK(dvp, 0); 4713 } 4714 } 4715 if (error == 0) { 4716 gotone++; 4717 NFSD_DEBUG(4, "gotone=%d\n", gotone); 4718 if (devid != NULL) { 4719 NFSBCOPY(fndds->nfsdev_deviceid, 4720 devid, NFSX_V4DEVICEID); 4721 devid += NFSX_V4DEVICEID; 4722 } 4723 if (dvpp != NULL) 4724 *tdvpp++ = dvp; 4725 if (fhp != NULL) 4726 NFSBCOPY(&pf->dsf_fh, fhp++, 4727 NFSX_MYFH); 4728 if (fnamep != NULL && gotone == 1) 4729 strlcpy(fnamep, 4730 pf->dsf_filename, 4731 sizeof(pf->dsf_filename)); 4732 } else 4733 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 4734 "err=%d\n", error); 4735 } 4736 } 4737 } 4738 if (error == 0 && gotone == 0) 4739 error = ENOENT; 4740 4741 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 4742 error); 4743 if (error == 0) 4744 *mirrorcntp = gotone; 4745 else { 4746 if (gotone > 0 && dvpp != NULL) { 4747 /* 4748 * If the error didn't occur on the first one and 4749 * dvpp != NULL, the one(s) prior to the failure will 4750 * have locked dvp's that need to be unlocked. 4751 */ 4752 for (i = 0; i < gotone; i++) { 4753 NFSVOPUNLOCK(*dvpp, 0); 4754 *dvpp++ = NULL; 4755 } 4756 } 4757 /* 4758 * If it found the vnode to be copied from before a failure, 4759 * it needs to be vput()'d. 4760 */ 4761 if (nvpp != NULL && *nvpp != NULL) { 4762 vput(*nvpp); 4763 *nvpp = NULL; 4764 } 4765 } 4766 return (error); 4767 } 4768 4769 /* 4770 * Set the extended attribute for the Change attribute. 4771 */ 4772 static int 4773 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4774 { 4775 struct pnfsdsattr dsattr; 4776 int error; 4777 4778 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 4779 dsattr.dsa_filerev = nap->na_filerev; 4780 dsattr.dsa_size = nap->na_size; 4781 dsattr.dsa_atime = nap->na_atime; 4782 dsattr.dsa_mtime = nap->na_mtime; 4783 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4784 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 4785 if (error != 0) 4786 printf("pNFS: setextattr=%d\n", error); 4787 return (error); 4788 } 4789 4790 static int 4791 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 4792 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 4793 { 4794 uint32_t *tl; 4795 struct nfsrv_descript *nd; 4796 nfsv4stateid_t st; 4797 struct mbuf *m, *m2; 4798 int error = 0, retlen, tlen, trimlen; 4799 4800 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 4801 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4802 *mpp = NULL; 4803 /* 4804 * Use a stateid where other is an alternating 01010 pattern and 4805 * seqid is 0xffffffff. This value is not defined as special by 4806 * the RFC and is used by the FreeBSD NFS server to indicate an 4807 * MDS->DS proxy operation. 4808 */ 4809 st.other[0] = 0x55555555; 4810 st.other[1] = 0x55555555; 4811 st.other[2] = 0x55555555; 4812 st.seqid = 0xffffffff; 4813 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 4814 NULL, NULL, 0, 0); 4815 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4816 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 4817 txdr_hyper(off, tl); 4818 *(tl + 2) = txdr_unsigned(len); 4819 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 4820 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 4821 if (error != 0) { 4822 free(nd, M_TEMP); 4823 return (error); 4824 } 4825 if (nd->nd_repstat == 0) { 4826 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4827 NFSM_STRSIZ(retlen, len); 4828 if (retlen > 0) { 4829 /* Trim off the pre-data XDR from the mbuf chain. */ 4830 m = nd->nd_mrep; 4831 while (m != NULL && m != nd->nd_md) { 4832 if (m->m_next == nd->nd_md) { 4833 m->m_next = NULL; 4834 m_freem(nd->nd_mrep); 4835 nd->nd_mrep = m = nd->nd_md; 4836 } else 4837 m = m->m_next; 4838 } 4839 if (m == NULL) { 4840 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4841 error = ENOENT; 4842 goto nfsmout; 4843 } 4844 4845 /* 4846 * Now, adjust first mbuf so that any XDR before the 4847 * read data is skipped over. 4848 */ 4849 trimlen = nd->nd_dpos - mtod(m, char *); 4850 if (trimlen > 0) { 4851 m->m_len -= trimlen; 4852 NFSM_DATAP(m, trimlen); 4853 } 4854 4855 /* 4856 * Truncate the mbuf chain at retlen bytes of data, 4857 * plus XDR padding that brings the length up to a 4858 * multiple of 4. 4859 */ 4860 tlen = NFSM_RNDUP(retlen); 4861 do { 4862 if (m->m_len >= tlen) { 4863 m->m_len = tlen; 4864 tlen = 0; 4865 m2 = m->m_next; 4866 m->m_next = NULL; 4867 m_freem(m2); 4868 break; 4869 } 4870 tlen -= m->m_len; 4871 m = m->m_next; 4872 } while (m != NULL); 4873 if (tlen > 0) { 4874 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4875 error = ENOENT; 4876 goto nfsmout; 4877 } 4878 *mpp = nd->nd_mrep; 4879 *mpendp = m; 4880 nd->nd_mrep = NULL; 4881 } 4882 } else 4883 error = nd->nd_repstat; 4884 nfsmout: 4885 /* If nd->nd_mrep is already NULL, this is a no-op. */ 4886 m_freem(nd->nd_mrep); 4887 free(nd, M_TEMP); 4888 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 4889 return (error); 4890 } 4891 4892 /* 4893 * Do a write RPC on a DS data file, using this structure for the arguments, 4894 * so that this function can be executed by a separate kernel process. 4895 */ 4896 struct nfsrvwritedsdorpc { 4897 int done; 4898 int inprog; 4899 struct task tsk; 4900 fhandle_t fh; 4901 off_t off; 4902 int len; 4903 struct nfsmount *nmp; 4904 struct ucred *cred; 4905 NFSPROC_T *p; 4906 struct mbuf *m; 4907 int err; 4908 }; 4909 4910 static int 4911 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 4912 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 4913 { 4914 uint32_t *tl; 4915 struct nfsrv_descript *nd; 4916 nfsattrbit_t attrbits; 4917 nfsv4stateid_t st; 4918 int commit, error, retlen; 4919 4920 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4921 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 4922 sizeof(fhandle_t), NULL, NULL, 0, 0); 4923 4924 /* 4925 * Use a stateid where other is an alternating 01010 pattern and 4926 * seqid is 0xffffffff. This value is not defined as special by 4927 * the RFC and is used by the FreeBSD NFS server to indicate an 4928 * MDS->DS proxy operation. 4929 */ 4930 st.other[0] = 0x55555555; 4931 st.other[1] = 0x55555555; 4932 st.other[2] = 0x55555555; 4933 st.seqid = 0xffffffff; 4934 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4935 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 4936 txdr_hyper(off, tl); 4937 tl += 2; 4938 /* 4939 * Do all writes FileSync, since the server doesn't hold onto dirty 4940 * buffers. Since clients should be accessing the DS servers directly 4941 * using the pNFS layouts, this just needs to work correctly as a 4942 * fallback. 4943 */ 4944 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 4945 *tl = txdr_unsigned(len); 4946 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 4947 4948 /* Put data in mbuf chain. */ 4949 nd->nd_mb->m_next = m; 4950 4951 /* Set nd_mb and nd_bpos to end of data. */ 4952 while (m->m_next != NULL) 4953 m = m->m_next; 4954 nd->nd_mb = m; 4955 nd->nd_bpos = mtod(m, char *) + m->m_len; 4956 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 4957 4958 /* Do a Getattr for Size, Change and Modify Time. */ 4959 NFSZERO_ATTRBIT(&attrbits); 4960 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 4961 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 4962 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 4963 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 4964 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4965 *tl = txdr_unsigned(NFSV4OP_GETATTR); 4966 (void) nfsrv_putattrbit(nd, &attrbits); 4967 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 4968 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 4969 if (error != 0) { 4970 free(nd, M_TEMP); 4971 return (error); 4972 } 4973 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 4974 /* Get rid of weak cache consistency data for now. */ 4975 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 4976 (ND_NFSV4 | ND_V4WCCATTR)) { 4977 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 4978 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 4979 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 4980 if (error != 0) 4981 goto nfsmout; 4982 /* 4983 * Get rid of Op# and status for next op. 4984 */ 4985 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 4986 if (*++tl != 0) 4987 nd->nd_flag |= ND_NOMOREDATA; 4988 } 4989 if (nd->nd_repstat == 0) { 4990 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 4991 retlen = fxdr_unsigned(int, *tl++); 4992 commit = fxdr_unsigned(int, *tl); 4993 if (commit != NFSWRITE_FILESYNC) 4994 error = NFSERR_IO; 4995 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 4996 retlen, commit, error); 4997 } else 4998 error = nd->nd_repstat; 4999 /* We have no use for the Write Verifier since we use FileSync. */ 5000 5001 /* 5002 * Get the Change, Size, Access Time and Modify Time attributes and set 5003 * on the Metadata file, so its attributes will be what the file's 5004 * would be if it had been written. 5005 */ 5006 if (error == 0) { 5007 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5008 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5009 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5010 } 5011 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 5012 nfsmout: 5013 m_freem(nd->nd_mrep); 5014 free(nd, M_TEMP); 5015 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 5016 return (error); 5017 } 5018 5019 /* 5020 * Start up the thread that will execute nfsrv_writedsdorpc(). 5021 */ 5022 static void 5023 start_writedsdorpc(void *arg, int pending) 5024 { 5025 struct nfsrvwritedsdorpc *drpc; 5026 5027 drpc = (struct nfsrvwritedsdorpc *)arg; 5028 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5029 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5030 drpc->done = 1; 5031 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5032 } 5033 5034 static int 5035 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5036 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5037 struct mbuf **mpp, char *cp, int *failposp) 5038 { 5039 struct nfsrvwritedsdorpc *drpc, *tdrpc; 5040 struct nfsvattr na; 5041 struct mbuf *m; 5042 int error, i, offs, ret, timo; 5043 5044 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5045 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5046 drpc = NULL; 5047 if (mirrorcnt > 1) 5048 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5049 M_WAITOK); 5050 5051 /* Calculate offset in mbuf chain that data starts. */ 5052 offs = cp - mtod(*mpp, char *); 5053 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5054 5055 /* 5056 * Do the write RPC for every DS, using a separate kernel process 5057 * for every DS except the last one. 5058 */ 5059 error = 0; 5060 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5061 tdrpc->done = 0; 5062 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5063 tdrpc->off = off; 5064 tdrpc->len = len; 5065 tdrpc->nmp = *nmpp; 5066 tdrpc->cred = cred; 5067 tdrpc->p = p; 5068 tdrpc->inprog = 0; 5069 tdrpc->err = 0; 5070 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5071 ret = EIO; 5072 if (nfs_pnfsiothreads != 0) { 5073 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5074 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5075 ret); 5076 } 5077 if (ret != 0) { 5078 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5079 tdrpc->m, cred, p); 5080 if (nfsds_failerr(ret) && *failposp == -1) 5081 *failposp = i; 5082 else if (error == 0 && ret != 0) 5083 error = ret; 5084 } 5085 nmpp++; 5086 fhp++; 5087 } 5088 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5089 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5090 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5091 *failposp = mirrorcnt - 1; 5092 else if (error == 0 && ret != 0) 5093 error = ret; 5094 if (error == 0) 5095 error = nfsrv_setextattr(vp, &na, p); 5096 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5097 tdrpc = drpc; 5098 timo = hz / 50; /* Wait for 20msec. */ 5099 if (timo < 1) 5100 timo = 1; 5101 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5102 /* Wait for RPCs on separate threads to complete. */ 5103 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5104 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5105 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5106 *failposp = i; 5107 else if (error == 0 && tdrpc->err != 0) 5108 error = tdrpc->err; 5109 } 5110 free(drpc, M_TEMP); 5111 return (error); 5112 } 5113 5114 static int 5115 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5116 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5117 struct nfsvattr *dsnap) 5118 { 5119 uint32_t *tl; 5120 struct nfsrv_descript *nd; 5121 nfsv4stateid_t st; 5122 nfsattrbit_t attrbits; 5123 int error; 5124 5125 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5126 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5127 /* 5128 * Use a stateid where other is an alternating 01010 pattern and 5129 * seqid is 0xffffffff. This value is not defined as special by 5130 * the RFC and is used by the FreeBSD NFS server to indicate an 5131 * MDS->DS proxy operation. 5132 */ 5133 st.other[0] = 0x55555555; 5134 st.other[1] = 0x55555555; 5135 st.other[2] = 0x55555555; 5136 st.seqid = 0xffffffff; 5137 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5138 NULL, NULL, 0, 0); 5139 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5140 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5141 5142 /* Do a Getattr for Size, Change, Access Time and Modify Time. */ 5143 NFSZERO_ATTRBIT(&attrbits); 5144 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5145 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5146 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5147 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5148 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5149 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5150 (void) nfsrv_putattrbit(nd, &attrbits); 5151 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5152 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5153 if (error != 0) { 5154 free(nd, M_TEMP); 5155 return (error); 5156 } 5157 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5158 nd->nd_repstat); 5159 /* Get rid of weak cache consistency data for now. */ 5160 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5161 (ND_NFSV4 | ND_V4WCCATTR)) { 5162 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5163 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5164 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5165 if (error != 0) 5166 goto nfsmout; 5167 /* 5168 * Get rid of Op# and status for next op. 5169 */ 5170 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5171 if (*++tl != 0) 5172 nd->nd_flag |= ND_NOMOREDATA; 5173 } 5174 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5175 if (error != 0) 5176 goto nfsmout; 5177 if (nd->nd_repstat != 0) 5178 error = nd->nd_repstat; 5179 /* 5180 * Get the Change, Size, Access Time and Modify Time attributes and set 5181 * on the Metadata file, so its attributes will be what the file's 5182 * would be if it had been written. 5183 */ 5184 if (error == 0) { 5185 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5186 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5187 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5188 } 5189 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5190 nfsmout: 5191 m_freem(nd->nd_mrep); 5192 free(nd, M_TEMP); 5193 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5194 return (error); 5195 } 5196 5197 struct nfsrvsetattrdsdorpc { 5198 int done; 5199 int inprog; 5200 struct task tsk; 5201 fhandle_t fh; 5202 struct nfsmount *nmp; 5203 struct vnode *vp; 5204 struct ucred *cred; 5205 NFSPROC_T *p; 5206 struct nfsvattr na; 5207 struct nfsvattr dsna; 5208 int err; 5209 }; 5210 5211 /* 5212 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5213 */ 5214 static void 5215 start_setattrdsdorpc(void *arg, int pending) 5216 { 5217 struct nfsrvsetattrdsdorpc *drpc; 5218 5219 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5220 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5221 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5222 drpc->done = 1; 5223 } 5224 5225 static int 5226 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5227 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5228 struct nfsvattr *nap, int *failposp) 5229 { 5230 struct nfsrvsetattrdsdorpc *drpc, *tdrpc; 5231 struct nfsvattr na; 5232 int error, i, ret, timo; 5233 5234 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5235 drpc = NULL; 5236 if (mirrorcnt > 1) 5237 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5238 M_WAITOK); 5239 5240 /* 5241 * Do the setattr RPC for every DS, using a separate kernel process 5242 * for every DS except the last one. 5243 */ 5244 error = 0; 5245 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5246 tdrpc->done = 0; 5247 tdrpc->inprog = 0; 5248 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5249 tdrpc->nmp = *nmpp; 5250 tdrpc->vp = vp; 5251 tdrpc->cred = cred; 5252 tdrpc->p = p; 5253 tdrpc->na = *nap; 5254 tdrpc->err = 0; 5255 ret = EIO; 5256 if (nfs_pnfsiothreads != 0) { 5257 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 5258 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 5259 ret); 5260 } 5261 if (ret != 0) { 5262 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 5263 &na); 5264 if (nfsds_failerr(ret) && *failposp == -1) 5265 *failposp = i; 5266 else if (error == 0 && ret != 0) 5267 error = ret; 5268 } 5269 nmpp++; 5270 fhp++; 5271 } 5272 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 5273 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5274 *failposp = mirrorcnt - 1; 5275 else if (error == 0 && ret != 0) 5276 error = ret; 5277 if (error == 0) 5278 error = nfsrv_setextattr(vp, &na, p); 5279 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 5280 tdrpc = drpc; 5281 timo = hz / 50; /* Wait for 20msec. */ 5282 if (timo < 1) 5283 timo = 1; 5284 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5285 /* Wait for RPCs on separate threads to complete. */ 5286 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5287 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 5288 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5289 *failposp = i; 5290 else if (error == 0 && tdrpc->err != 0) 5291 error = tdrpc->err; 5292 } 5293 free(drpc, M_TEMP); 5294 return (error); 5295 } 5296 5297 /* 5298 * Do a Setattr of an NFSv4 ACL on the DS file. 5299 */ 5300 static int 5301 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5302 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 5303 { 5304 struct nfsrv_descript *nd; 5305 nfsv4stateid_t st; 5306 nfsattrbit_t attrbits; 5307 int error; 5308 5309 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 5310 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5311 /* 5312 * Use a stateid where other is an alternating 01010 pattern and 5313 * seqid is 0xffffffff. This value is not defined as special by 5314 * the RFC and is used by the FreeBSD NFS server to indicate an 5315 * MDS->DS proxy operation. 5316 */ 5317 st.other[0] = 0x55555555; 5318 st.other[1] = 0x55555555; 5319 st.other[2] = 0x55555555; 5320 st.seqid = 0xffffffff; 5321 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5322 NULL, NULL, 0, 0); 5323 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5324 NFSZERO_ATTRBIT(&attrbits); 5325 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 5326 /* 5327 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 5328 * so passing in the metadata "vp" will be ok, since it is of 5329 * the same type (VREG). 5330 */ 5331 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 5332 NULL, 0, 0, 0, 0, 0, NULL); 5333 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5334 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5335 if (error != 0) { 5336 free(nd, M_TEMP); 5337 return (error); 5338 } 5339 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 5340 nd->nd_repstat); 5341 error = nd->nd_repstat; 5342 m_freem(nd->nd_mrep); 5343 free(nd, M_TEMP); 5344 return (error); 5345 } 5346 5347 struct nfsrvsetacldsdorpc { 5348 int done; 5349 int inprog; 5350 struct task tsk; 5351 fhandle_t fh; 5352 struct nfsmount *nmp; 5353 struct vnode *vp; 5354 struct ucred *cred; 5355 NFSPROC_T *p; 5356 struct acl *aclp; 5357 int err; 5358 }; 5359 5360 /* 5361 * Start up the thread that will execute nfsrv_setacldsdorpc(). 5362 */ 5363 static void 5364 start_setacldsdorpc(void *arg, int pending) 5365 { 5366 struct nfsrvsetacldsdorpc *drpc; 5367 5368 drpc = (struct nfsrvsetacldsdorpc *)arg; 5369 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 5370 drpc->vp, drpc->nmp, drpc->aclp); 5371 drpc->done = 1; 5372 } 5373 5374 static int 5375 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5376 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 5377 int *failposp) 5378 { 5379 struct nfsrvsetacldsdorpc *drpc, *tdrpc; 5380 int error, i, ret, timo; 5381 5382 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 5383 drpc = NULL; 5384 if (mirrorcnt > 1) 5385 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5386 M_WAITOK); 5387 5388 /* 5389 * Do the setattr RPC for every DS, using a separate kernel process 5390 * for every DS except the last one. 5391 */ 5392 error = 0; 5393 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5394 tdrpc->done = 0; 5395 tdrpc->inprog = 0; 5396 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5397 tdrpc->nmp = *nmpp; 5398 tdrpc->vp = vp; 5399 tdrpc->cred = cred; 5400 tdrpc->p = p; 5401 tdrpc->aclp = aclp; 5402 tdrpc->err = 0; 5403 ret = EIO; 5404 if (nfs_pnfsiothreads != 0) { 5405 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 5406 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 5407 ret); 5408 } 5409 if (ret != 0) { 5410 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 5411 aclp); 5412 if (nfsds_failerr(ret) && *failposp == -1) 5413 *failposp = i; 5414 else if (error == 0 && ret != 0) 5415 error = ret; 5416 } 5417 nmpp++; 5418 fhp++; 5419 } 5420 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 5421 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5422 *failposp = mirrorcnt - 1; 5423 else if (error == 0 && ret != 0) 5424 error = ret; 5425 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 5426 tdrpc = drpc; 5427 timo = hz / 50; /* Wait for 20msec. */ 5428 if (timo < 1) 5429 timo = 1; 5430 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5431 /* Wait for RPCs on separate threads to complete. */ 5432 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5433 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 5434 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5435 *failposp = i; 5436 else if (error == 0 && tdrpc->err != 0) 5437 error = tdrpc->err; 5438 } 5439 free(drpc, M_TEMP); 5440 return (error); 5441 } 5442 5443 /* 5444 * Getattr call to the DS for the Modify, Size and Change attributes. 5445 */ 5446 static int 5447 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5448 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 5449 { 5450 struct nfsrv_descript *nd; 5451 int error; 5452 nfsattrbit_t attrbits; 5453 5454 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 5455 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5456 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 5457 sizeof(fhandle_t), NULL, NULL, 0, 0); 5458 NFSZERO_ATTRBIT(&attrbits); 5459 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5460 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5461 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5462 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5463 (void) nfsrv_putattrbit(nd, &attrbits); 5464 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5465 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5466 if (error != 0) { 5467 free(nd, M_TEMP); 5468 return (error); 5469 } 5470 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 5471 nd->nd_repstat); 5472 if (nd->nd_repstat == 0) { 5473 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 5474 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 5475 NULL, NULL); 5476 /* 5477 * We can only save the updated values in the extended 5478 * attribute if the vp is exclusively locked. 5479 * This should happen when any of the following operations 5480 * occur on the vnode: 5481 * Close, Delegreturn, LayoutCommit, LayoutReturn 5482 * As such, the updated extended attribute should get saved 5483 * before nfsrv_checkdsattr() returns 0 and allows the cached 5484 * attributes to be returned without calling this function. 5485 */ 5486 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 5487 error = nfsrv_setextattr(vp, nap, p); 5488 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 5489 error); 5490 } 5491 } else 5492 error = nd->nd_repstat; 5493 m_freem(nd->nd_mrep); 5494 free(nd, M_TEMP); 5495 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 5496 return (error); 5497 } 5498 5499 /* 5500 * Get the device id and file handle for a DS file. 5501 */ 5502 int 5503 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 5504 fhandle_t *fhp, char *devid) 5505 { 5506 int buflen, error; 5507 char *buf; 5508 5509 buflen = 1024; 5510 buf = malloc(buflen, M_TEMP, M_WAITOK); 5511 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 5512 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 5513 free(buf, M_TEMP); 5514 return (error); 5515 } 5516 5517 /* 5518 * Do a Lookup against the DS for the filename. 5519 */ 5520 static int 5521 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 5522 struct vnode **nvpp, NFSPROC_T *p) 5523 { 5524 struct nameidata named; 5525 struct ucred *tcred; 5526 char *bufp; 5527 u_long *hashp; 5528 struct vnode *nvp; 5529 int error; 5530 5531 tcred = newnfs_getcred(); 5532 named.ni_cnd.cn_nameiop = LOOKUP; 5533 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 5534 named.ni_cnd.cn_cred = tcred; 5535 named.ni_cnd.cn_thread = p; 5536 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 5537 nfsvno_setpathbuf(&named, &bufp, &hashp); 5538 named.ni_cnd.cn_nameptr = bufp; 5539 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 5540 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 5541 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 5542 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 5543 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 5544 NFSFREECRED(tcred); 5545 nfsvno_relpathbuf(&named); 5546 if (error == 0) 5547 *nvpp = nvp; 5548 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 5549 return (error); 5550 } 5551 5552 /* 5553 * Set the file handle to the correct one. 5554 */ 5555 static void 5556 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 5557 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 5558 { 5559 struct nfsnode *np; 5560 int ret; 5561 5562 np = VTONFS(nvp); 5563 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 5564 /* 5565 * We can only do a vn_set_extattr() if the vnode is exclusively 5566 * locked and vn_start_write() has been done. If devid != NULL or 5567 * fnamep != NULL or the vnode is shared locked, vn_start_write() 5568 * may not have been done. 5569 * If not done now, it will be done on a future call. 5570 */ 5571 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 5572 LK_EXCLUSIVE) 5573 ret = vn_extattr_set(vp, IO_NODELOCKED, 5574 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 5575 (char *)pf, p); 5576 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 5577 } 5578 5579 /* 5580 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 5581 * when the DS has failed. 5582 */ 5583 void 5584 nfsrv_killrpcs(struct nfsmount *nmp) 5585 { 5586 5587 /* 5588 * Call newnfs_nmcancelreqs() to cause 5589 * any RPCs in progress on the mount point to 5590 * fail. 5591 * This will cause any process waiting for an 5592 * RPC to complete while holding a vnode lock 5593 * on the mounted-on vnode (such as "df" or 5594 * a non-forced "umount") to fail. 5595 * This will unlock the mounted-on vnode so 5596 * a forced dismount can succeed. 5597 * The NFSMNTP_CANCELRPCS flag should be set when this function is 5598 * called. 5599 */ 5600 newnfs_nmcancelreqs(nmp); 5601 } 5602 5603 /* 5604 * Sum up the statfs info for each of the DSs, so that the client will 5605 * receive the total for all DSs. 5606 */ 5607 static int 5608 nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp) 5609 { 5610 struct statfs *tsf; 5611 struct nfsdevice *ds; 5612 struct vnode **dvpp, **tdvpp, *dvp; 5613 uint64_t tot; 5614 int cnt, error = 0, i; 5615 5616 if (nfsrv_devidcnt <= 0) 5617 return (ENXIO); 5618 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 5619 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 5620 5621 /* Get an array of the dvps for the DSs. */ 5622 tdvpp = dvpp; 5623 i = 0; 5624 NFSDDSLOCK(); 5625 /* First, search for matches for same file system. */ 5626 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5627 if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 && 5628 ds->nfsdev_mdsfsid.val[0] == mp->mnt_stat.f_fsid.val[0] && 5629 ds->nfsdev_mdsfsid.val[1] == mp->mnt_stat.f_fsid.val[1]) { 5630 if (++i > nfsrv_devidcnt) 5631 break; 5632 *tdvpp++ = ds->nfsdev_dvp; 5633 } 5634 } 5635 /* 5636 * If no matches for same file system, total all servers not assigned 5637 * to a file system. 5638 */ 5639 if (i == 0) { 5640 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5641 if (ds->nfsdev_nmp != NULL && 5642 ds->nfsdev_mdsisset == 0) { 5643 if (++i > nfsrv_devidcnt) 5644 break; 5645 *tdvpp++ = ds->nfsdev_dvp; 5646 } 5647 } 5648 } 5649 NFSDDSUNLOCK(); 5650 cnt = i; 5651 5652 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 5653 tdvpp = dvpp; 5654 for (i = 0; i < cnt && error == 0; i++) { 5655 dvp = *tdvpp++; 5656 error = VFS_STATFS(dvp->v_mount, tsf); 5657 if (error == 0) { 5658 if (sf->f_bsize == 0) { 5659 if (tsf->f_bsize > 0) 5660 sf->f_bsize = tsf->f_bsize; 5661 else 5662 sf->f_bsize = 8192; 5663 } 5664 if (tsf->f_blocks > 0) { 5665 if (sf->f_bsize != tsf->f_bsize) { 5666 tot = tsf->f_blocks * tsf->f_bsize; 5667 sf->f_blocks += (tot / sf->f_bsize); 5668 } else 5669 sf->f_blocks += tsf->f_blocks; 5670 } 5671 if (tsf->f_bfree > 0) { 5672 if (sf->f_bsize != tsf->f_bsize) { 5673 tot = tsf->f_bfree * tsf->f_bsize; 5674 sf->f_bfree += (tot / sf->f_bsize); 5675 } else 5676 sf->f_bfree += tsf->f_bfree; 5677 } 5678 if (tsf->f_bavail > 0) { 5679 if (sf->f_bsize != tsf->f_bsize) { 5680 tot = tsf->f_bavail * tsf->f_bsize; 5681 sf->f_bavail += (tot / sf->f_bsize); 5682 } else 5683 sf->f_bavail += tsf->f_bavail; 5684 } 5685 } 5686 } 5687 free(tsf, M_TEMP); 5688 free(dvpp, M_TEMP); 5689 return (error); 5690 } 5691 5692 /* 5693 * Set an NFSv4 acl. 5694 */ 5695 int 5696 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 5697 { 5698 int error; 5699 5700 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 5701 error = NFSERR_ATTRNOTSUPP; 5702 goto out; 5703 } 5704 /* 5705 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 5706 * Make sure it has enough room for that - splitting every entry 5707 * into two and appending "canonical six" entries at the end. 5708 * Cribbed out of kern/vfs_acl.c - Rick M. 5709 */ 5710 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 5711 error = NFSERR_ATTRNOTSUPP; 5712 goto out; 5713 } 5714 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 5715 if (error == 0) { 5716 error = nfsrv_dssetacl(vp, aclp, cred, p); 5717 if (error == ENOENT) 5718 error = 0; 5719 } 5720 5721 out: 5722 NFSEXITCODE(error); 5723 return (error); 5724 } 5725 5726 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 5727 5728 /* 5729 * Called once to initialize data structures... 5730 */ 5731 static int 5732 nfsd_modevent(module_t mod, int type, void *data) 5733 { 5734 int error = 0, i; 5735 static int loaded = 0; 5736 5737 switch (type) { 5738 case MOD_LOAD: 5739 if (loaded) 5740 goto out; 5741 newnfs_portinit(); 5742 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 5743 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 5744 MTX_DEF); 5745 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 5746 MTX_DEF); 5747 } 5748 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 5749 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 5750 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 5751 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 5752 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 5753 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 5754 nfsrvd_initcache(); 5755 nfsd_init(); 5756 NFSD_LOCK(); 5757 nfsrvd_init(0); 5758 NFSD_UNLOCK(); 5759 nfsd_mntinit(); 5760 #ifdef VV_DISABLEDELEG 5761 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 5762 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 5763 #endif 5764 nfsd_call_servertimer = nfsrv_servertimer; 5765 nfsd_call_nfsd = nfssvc_nfsd; 5766 loaded = 1; 5767 break; 5768 5769 case MOD_UNLOAD: 5770 if (newnfs_numnfsd != 0) { 5771 error = EBUSY; 5772 break; 5773 } 5774 5775 #ifdef VV_DISABLEDELEG 5776 vn_deleg_ops.vndeleg_recall = NULL; 5777 vn_deleg_ops.vndeleg_disable = NULL; 5778 #endif 5779 nfsd_call_servertimer = NULL; 5780 nfsd_call_nfsd = NULL; 5781 5782 /* Clean out all NFSv4 state. */ 5783 nfsrv_throwawayallstate(curthread); 5784 5785 /* Clean the NFS server reply cache */ 5786 nfsrvd_cleancache(); 5787 5788 /* Free up the krpc server pool. */ 5789 if (nfsrvd_pool != NULL) 5790 svcpool_destroy(nfsrvd_pool); 5791 5792 /* and get rid of the locks */ 5793 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 5794 mtx_destroy(&nfsrchash_table[i].mtx); 5795 mtx_destroy(&nfsrcahash_table[i].mtx); 5796 } 5797 mtx_destroy(&nfsrc_udpmtx); 5798 mtx_destroy(&nfs_v4root_mutex); 5799 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 5800 mtx_destroy(&nfsrv_dontlistlock_mtx); 5801 mtx_destroy(&nfsrv_recalllock_mtx); 5802 for (i = 0; i < nfsrv_sessionhashsize; i++) 5803 mtx_destroy(&nfssessionhash[i].mtx); 5804 if (nfslayouthash != NULL) { 5805 for (i = 0; i < nfsrv_layouthashsize; i++) 5806 mtx_destroy(&nfslayouthash[i].mtx); 5807 free(nfslayouthash, M_NFSDSESSION); 5808 } 5809 lockdestroy(&nfsv4root_mnt.mnt_explock); 5810 free(nfsclienthash, M_NFSDCLIENT); 5811 free(nfslockhash, M_NFSDLOCKFILE); 5812 free(nfssessionhash, M_NFSDSESSION); 5813 loaded = 0; 5814 break; 5815 default: 5816 error = EOPNOTSUPP; 5817 break; 5818 } 5819 5820 out: 5821 NFSEXITCODE(error); 5822 return (error); 5823 } 5824 static moduledata_t nfsd_mod = { 5825 "nfsd", 5826 nfsd_modevent, 5827 NULL, 5828 }; 5829 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 5830 5831 /* So that loader and kldload(2) can find us, wherever we are.. */ 5832 MODULE_VERSION(nfsd, 1); 5833 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 5834 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 5835 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 5836 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 5837 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 5838 5839