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 vnode *, off_t, int, struct ucred *, 114 struct thread *, int, struct mbuf **, char *, struct mbuf **, 115 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, TimeAccess, TimeModify and SpaceUsed 281 * attributes, as required. 282 * This needs to be done for regular files if: 283 * - non-NFSv4 RPCs or 284 * - when attrbitp == NULL or 285 * - an NFSv4 RPC with any of the above attributes in attrbitp. 286 * A return of 0 for nfsrv_proxyds() indicates that it has acquired 287 * these attributes. nfsrv_proxyds() will return an error if the 288 * server is not a pNFS one. 289 */ 290 gotattr = 0; 291 if (vp->v_type == VREG && nfsrv_devidcnt > 0 && (attrbitp == NULL || 292 (nd->nd_flag & ND_NFSV4) == 0 || 293 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_CHANGE) || 294 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) || 295 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESS) || 296 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFY) || 297 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEUSED))) { 298 error = nfsrv_proxyds(vp, 0, 0, nd->nd_cred, p, 299 NFSPROC_GETATTR, NULL, NULL, NULL, &na, NULL); 300 if (error == 0) 301 gotattr = 1; 302 } 303 304 error = VOP_GETATTR(vp, &nvap->na_vattr, nd->nd_cred); 305 if (lockedit != 0) 306 NFSVOPUNLOCK(vp, 0); 307 308 /* 309 * If we got the Change, Size and Modify Time from the DS, 310 * replace them. 311 */ 312 if (gotattr != 0) { 313 nvap->na_atime = na.na_atime; 314 nvap->na_mtime = na.na_mtime; 315 nvap->na_filerev = na.na_filerev; 316 nvap->na_size = na.na_size; 317 nvap->na_bytes = na.na_bytes; 318 } 319 NFSD_DEBUG(4, "nfsvno_getattr: gotattr=%d err=%d chg=%ju\n", gotattr, 320 error, (uintmax_t)na.na_filerev); 321 322 NFSEXITCODE(error); 323 return (error); 324 } 325 326 /* 327 * Get a file handle for a vnode. 328 */ 329 int 330 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 331 { 332 int error; 333 334 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 335 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 336 error = VOP_VPTOFH(vp, &fhp->fh_fid); 337 338 NFSEXITCODE(error); 339 return (error); 340 } 341 342 /* 343 * Perform access checking for vnodes obtained from file handles that would 344 * refer to files already opened by a Unix client. You cannot just use 345 * vn_writechk() and VOP_ACCESSX() for two reasons. 346 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 347 * case. 348 * 2 - The owner is to be given access irrespective of mode bits for some 349 * operations, so that processes that chmod after opening a file don't 350 * break. 351 */ 352 int 353 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 354 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 355 u_int32_t *supportedtypep) 356 { 357 struct vattr vattr; 358 int error = 0, getret = 0; 359 360 if (vpislocked == 0) { 361 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 362 error = EPERM; 363 goto out; 364 } 365 } 366 if (accmode & VWRITE) { 367 /* Just vn_writechk() changed to check rdonly */ 368 /* 369 * Disallow write attempts on read-only file systems; 370 * unless the file is a socket or a block or character 371 * device resident on the file system. 372 */ 373 if (NFSVNO_EXRDONLY(exp) || 374 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 375 switch (vp->v_type) { 376 case VREG: 377 case VDIR: 378 case VLNK: 379 error = EROFS; 380 default: 381 break; 382 } 383 } 384 /* 385 * If there's shared text associated with 386 * the inode, try to free it up once. If 387 * we fail, we can't allow writing. 388 */ 389 if (VOP_IS_TEXT(vp) && error == 0) 390 error = ETXTBSY; 391 } 392 if (error != 0) { 393 if (vpislocked == 0) 394 NFSVOPUNLOCK(vp, 0); 395 goto out; 396 } 397 398 /* 399 * Should the override still be applied when ACLs are enabled? 400 */ 401 error = VOP_ACCESSX(vp, accmode, cred, p); 402 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 403 /* 404 * Try again with VEXPLICIT_DENY, to see if the test for 405 * deletion is supported. 406 */ 407 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 408 if (error == 0) { 409 if (vp->v_type == VDIR) { 410 accmode &= ~(VDELETE | VDELETE_CHILD); 411 accmode |= VWRITE; 412 error = VOP_ACCESSX(vp, accmode, cred, p); 413 } else if (supportedtypep != NULL) { 414 *supportedtypep &= ~NFSACCESS_DELETE; 415 } 416 } 417 } 418 419 /* 420 * Allow certain operations for the owner (reads and writes 421 * on files that are already open). 422 */ 423 if (override != NFSACCCHK_NOOVERRIDE && 424 (error == EPERM || error == EACCES)) { 425 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 426 error = 0; 427 else if (override & NFSACCCHK_ALLOWOWNER) { 428 getret = VOP_GETATTR(vp, &vattr, cred); 429 if (getret == 0 && cred->cr_uid == vattr.va_uid) 430 error = 0; 431 } 432 } 433 if (vpislocked == 0) 434 NFSVOPUNLOCK(vp, 0); 435 436 out: 437 NFSEXITCODE(error); 438 return (error); 439 } 440 441 /* 442 * Set attribute(s) vnop. 443 */ 444 int 445 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 446 struct thread *p, struct nfsexstuff *exp) 447 { 448 u_quad_t savsize = 0; 449 int error, savedit; 450 451 /* 452 * If this is an exported file system and a pNFS service is running, 453 * don't VOP_SETATTR() of size for the MDS file system. 454 */ 455 savedit = 0; 456 error = 0; 457 if (vp->v_type == VREG && (vp->v_mount->mnt_flag & MNT_EXPORTED) != 0 && 458 nfsrv_devidcnt != 0 && nvap->na_vattr.va_size != VNOVAL && 459 nvap->na_vattr.va_size > 0) { 460 savsize = nvap->na_vattr.va_size; 461 nvap->na_vattr.va_size = VNOVAL; 462 if (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 463 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 464 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 465 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 466 nvap->na_vattr.va_mtime.tv_sec != VNOVAL) 467 savedit = 1; 468 else 469 savedit = 2; 470 } 471 if (savedit != 2) 472 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 473 if (savedit != 0) 474 nvap->na_vattr.va_size = savsize; 475 if (error == 0 && (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 476 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 477 nvap->na_vattr.va_size != VNOVAL || 478 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 479 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 480 nvap->na_vattr.va_mtime.tv_sec != VNOVAL)) { 481 /* For a pNFS server, set the attributes on the DS file. */ 482 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETATTR, 483 NULL, NULL, NULL, nvap, NULL); 484 if (error == ENOENT) 485 error = 0; 486 } 487 NFSEXITCODE(error); 488 return (error); 489 } 490 491 /* 492 * Set up nameidata for a lookup() call and do it. 493 */ 494 int 495 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 496 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 497 struct vnode **retdirp) 498 { 499 struct componentname *cnp = &ndp->ni_cnd; 500 int i; 501 struct iovec aiov; 502 struct uio auio; 503 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 504 int error = 0; 505 char *cp; 506 507 *retdirp = NULL; 508 cnp->cn_nameptr = cnp->cn_pnbuf; 509 ndp->ni_lcf = 0; 510 /* 511 * Extract and set starting directory. 512 */ 513 if (dp->v_type != VDIR) { 514 if (islocked) 515 vput(dp); 516 else 517 vrele(dp); 518 nfsvno_relpathbuf(ndp); 519 error = ENOTDIR; 520 goto out1; 521 } 522 if (islocked) 523 NFSVOPUNLOCK(dp, 0); 524 VREF(dp); 525 *retdirp = dp; 526 if (NFSVNO_EXRDONLY(exp)) 527 cnp->cn_flags |= RDONLY; 528 ndp->ni_segflg = UIO_SYSSPACE; 529 530 if (nd->nd_flag & ND_PUBLOOKUP) { 531 ndp->ni_loopcnt = 0; 532 if (cnp->cn_pnbuf[0] == '/') { 533 vrele(dp); 534 /* 535 * Check for degenerate pathnames here, since lookup() 536 * panics on them. 537 */ 538 for (i = 1; i < ndp->ni_pathlen; i++) 539 if (cnp->cn_pnbuf[i] != '/') 540 break; 541 if (i == ndp->ni_pathlen) { 542 error = NFSERR_ACCES; 543 goto out; 544 } 545 dp = rootvnode; 546 VREF(dp); 547 } 548 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 549 (nd->nd_flag & ND_NFSV4) == 0) { 550 /* 551 * Only cross mount points for NFSv4 when doing a 552 * mount while traversing the file system above 553 * the mount point, unless nfsrv_enable_crossmntpt is set. 554 */ 555 cnp->cn_flags |= NOCROSSMOUNT; 556 } 557 558 /* 559 * Initialize for scan, set ni_startdir and bump ref on dp again 560 * because lookup() will dereference ni_startdir. 561 */ 562 563 cnp->cn_thread = p; 564 ndp->ni_startdir = dp; 565 ndp->ni_rootdir = rootvnode; 566 ndp->ni_topdir = NULL; 567 568 if (!lockleaf) 569 cnp->cn_flags |= LOCKLEAF; 570 for (;;) { 571 cnp->cn_nameptr = cnp->cn_pnbuf; 572 /* 573 * Call lookup() to do the real work. If an error occurs, 574 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 575 * we do not have to dereference anything before returning. 576 * In either case ni_startdir will be dereferenced and NULLed 577 * out. 578 */ 579 error = lookup(ndp); 580 if (error) 581 break; 582 583 /* 584 * Check for encountering a symbolic link. Trivial 585 * termination occurs if no symlink encountered. 586 */ 587 if ((cnp->cn_flags & ISSYMLINK) == 0) { 588 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 589 nfsvno_relpathbuf(ndp); 590 if (ndp->ni_vp && !lockleaf) 591 NFSVOPUNLOCK(ndp->ni_vp, 0); 592 break; 593 } 594 595 /* 596 * Validate symlink 597 */ 598 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 599 NFSVOPUNLOCK(ndp->ni_dvp, 0); 600 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 601 error = EINVAL; 602 goto badlink2; 603 } 604 605 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 606 error = ELOOP; 607 goto badlink2; 608 } 609 if (ndp->ni_pathlen > 1) 610 cp = uma_zalloc(namei_zone, M_WAITOK); 611 else 612 cp = cnp->cn_pnbuf; 613 aiov.iov_base = cp; 614 aiov.iov_len = MAXPATHLEN; 615 auio.uio_iov = &aiov; 616 auio.uio_iovcnt = 1; 617 auio.uio_offset = 0; 618 auio.uio_rw = UIO_READ; 619 auio.uio_segflg = UIO_SYSSPACE; 620 auio.uio_td = NULL; 621 auio.uio_resid = MAXPATHLEN; 622 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 623 if (error) { 624 badlink1: 625 if (ndp->ni_pathlen > 1) 626 uma_zfree(namei_zone, cp); 627 badlink2: 628 vrele(ndp->ni_dvp); 629 vput(ndp->ni_vp); 630 break; 631 } 632 linklen = MAXPATHLEN - auio.uio_resid; 633 if (linklen == 0) { 634 error = ENOENT; 635 goto badlink1; 636 } 637 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 638 error = ENAMETOOLONG; 639 goto badlink1; 640 } 641 642 /* 643 * Adjust or replace path 644 */ 645 if (ndp->ni_pathlen > 1) { 646 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 647 uma_zfree(namei_zone, cnp->cn_pnbuf); 648 cnp->cn_pnbuf = cp; 649 } else 650 cnp->cn_pnbuf[linklen] = '\0'; 651 ndp->ni_pathlen += linklen; 652 653 /* 654 * Cleanup refs for next loop and check if root directory 655 * should replace current directory. Normally ni_dvp 656 * becomes the new base directory and is cleaned up when 657 * we loop. Explicitly null pointers after invalidation 658 * to clarify operation. 659 */ 660 vput(ndp->ni_vp); 661 ndp->ni_vp = NULL; 662 663 if (cnp->cn_pnbuf[0] == '/') { 664 vrele(ndp->ni_dvp); 665 ndp->ni_dvp = ndp->ni_rootdir; 666 VREF(ndp->ni_dvp); 667 } 668 ndp->ni_startdir = ndp->ni_dvp; 669 ndp->ni_dvp = NULL; 670 } 671 if (!lockleaf) 672 cnp->cn_flags &= ~LOCKLEAF; 673 674 out: 675 if (error) { 676 nfsvno_relpathbuf(ndp); 677 ndp->ni_vp = NULL; 678 ndp->ni_dvp = NULL; 679 ndp->ni_startdir = NULL; 680 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 681 ndp->ni_dvp = NULL; 682 } 683 684 out1: 685 NFSEXITCODE2(error, nd); 686 return (error); 687 } 688 689 /* 690 * Set up a pathname buffer and return a pointer to it and, optionally 691 * set a hash pointer. 692 */ 693 void 694 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 695 { 696 struct componentname *cnp = &ndp->ni_cnd; 697 698 cnp->cn_flags |= (NOMACCHECK | HASBUF); 699 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 700 if (hashpp != NULL) 701 *hashpp = NULL; 702 *bufpp = cnp->cn_pnbuf; 703 } 704 705 /* 706 * Release the above path buffer, if not released by nfsvno_namei(). 707 */ 708 void 709 nfsvno_relpathbuf(struct nameidata *ndp) 710 { 711 712 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 713 panic("nfsrelpath"); 714 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 715 ndp->ni_cnd.cn_flags &= ~HASBUF; 716 } 717 718 /* 719 * Readlink vnode op into an mbuf list. 720 */ 721 int 722 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 723 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 724 { 725 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; 726 struct iovec *ivp = iv; 727 struct uio io, *uiop = &io; 728 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL; 729 int i, len, tlen, error = 0; 730 731 len = 0; 732 i = 0; 733 while (len < NFS_MAXPATHLEN) { 734 NFSMGET(mp); 735 MCLGET(mp, M_WAITOK); 736 mp->m_len = M_SIZE(mp); 737 if (len == 0) { 738 mp3 = mp2 = mp; 739 } else { 740 mp2->m_next = mp; 741 mp2 = mp; 742 } 743 if ((len + mp->m_len) > NFS_MAXPATHLEN) { 744 mp->m_len = NFS_MAXPATHLEN - len; 745 len = NFS_MAXPATHLEN; 746 } else { 747 len += mp->m_len; 748 } 749 ivp->iov_base = mtod(mp, caddr_t); 750 ivp->iov_len = mp->m_len; 751 i++; 752 ivp++; 753 } 754 uiop->uio_iov = iv; 755 uiop->uio_iovcnt = i; 756 uiop->uio_offset = 0; 757 uiop->uio_resid = len; 758 uiop->uio_rw = UIO_READ; 759 uiop->uio_segflg = UIO_SYSSPACE; 760 uiop->uio_td = NULL; 761 error = VOP_READLINK(vp, uiop, cred); 762 if (error) { 763 m_freem(mp3); 764 *lenp = 0; 765 goto out; 766 } 767 if (uiop->uio_resid > 0) { 768 len -= uiop->uio_resid; 769 tlen = NFSM_RNDUP(len); 770 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 771 } 772 *lenp = len; 773 *mpp = mp3; 774 *mpendp = mp; 775 776 out: 777 NFSEXITCODE(error); 778 return (error); 779 } 780 781 /* 782 * Read vnode op call into mbuf list. 783 */ 784 int 785 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 786 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 787 { 788 struct mbuf *m; 789 int i; 790 struct iovec *iv; 791 struct iovec *iv2; 792 int error = 0, len, left, siz, tlen, ioflag = 0; 793 struct mbuf *m2 = NULL, *m3; 794 struct uio io, *uiop = &io; 795 struct nfsheur *nh; 796 797 /* 798 * Attempt to read from a DS file. A return of ENOENT implies 799 * there is no DS file to read. 800 */ 801 error = nfsrv_proxyds(vp, off, cnt, cred, p, NFSPROC_READDS, mpp, 802 NULL, mpendp, NULL, NULL); 803 if (error != ENOENT) 804 return (error); 805 806 len = left = NFSM_RNDUP(cnt); 807 m3 = NULL; 808 /* 809 * Generate the mbuf list with the uio_iov ref. to it. 810 */ 811 i = 0; 812 while (left > 0) { 813 NFSMGET(m); 814 MCLGET(m, M_WAITOK); 815 m->m_len = 0; 816 siz = min(M_TRAILINGSPACE(m), left); 817 left -= siz; 818 i++; 819 if (m3) 820 m2->m_next = m; 821 else 822 m3 = m; 823 m2 = m; 824 } 825 iv = malloc(i * sizeof (struct iovec), 826 M_TEMP, M_WAITOK); 827 uiop->uio_iov = iv2 = iv; 828 m = m3; 829 left = len; 830 i = 0; 831 while (left > 0) { 832 if (m == NULL) 833 panic("nfsvno_read iov"); 834 siz = min(M_TRAILINGSPACE(m), left); 835 if (siz > 0) { 836 iv->iov_base = mtod(m, caddr_t) + m->m_len; 837 iv->iov_len = siz; 838 m->m_len += siz; 839 left -= siz; 840 iv++; 841 i++; 842 } 843 m = m->m_next; 844 } 845 uiop->uio_iovcnt = i; 846 uiop->uio_offset = off; 847 uiop->uio_resid = len; 848 uiop->uio_rw = UIO_READ; 849 uiop->uio_segflg = UIO_SYSSPACE; 850 uiop->uio_td = NULL; 851 nh = nfsrv_sequential_heuristic(uiop, vp); 852 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 853 /* XXX KDM make this more systematic? */ 854 nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid; 855 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 856 free(iv2, M_TEMP); 857 if (error) { 858 m_freem(m3); 859 *mpp = NULL; 860 goto out; 861 } 862 nh->nh_nextoff = uiop->uio_offset; 863 tlen = len - uiop->uio_resid; 864 cnt = cnt < tlen ? cnt : tlen; 865 tlen = NFSM_RNDUP(cnt); 866 if (tlen == 0) { 867 m_freem(m3); 868 m3 = NULL; 869 } else if (len != tlen || tlen != cnt) 870 nfsrv_adj(m3, len - tlen, tlen - cnt); 871 *mpp = m3; 872 *mpendp = m2; 873 874 out: 875 NFSEXITCODE(error); 876 return (error); 877 } 878 879 /* 880 * Write vnode op from an mbuf list. 881 */ 882 int 883 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int *stable, 884 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 885 { 886 struct iovec *ivp; 887 int i, len; 888 struct iovec *iv; 889 int ioflags, error; 890 struct uio io, *uiop = &io; 891 struct nfsheur *nh; 892 893 /* 894 * Attempt to write to a DS file. A return of ENOENT implies 895 * there is no DS file to write. 896 */ 897 error = nfsrv_proxyds(vp, off, retlen, cred, p, NFSPROC_WRITEDS, 898 &mp, cp, NULL, NULL, NULL); 899 if (error != ENOENT) { 900 *stable = NFSWRITE_FILESYNC; 901 return (error); 902 } 903 904 ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, 905 M_WAITOK); 906 uiop->uio_iov = iv = ivp; 907 uiop->uio_iovcnt = cnt; 908 i = mtod(mp, caddr_t) + mp->m_len - cp; 909 len = retlen; 910 while (len > 0) { 911 if (mp == NULL) 912 panic("nfsvno_write"); 913 if (i > 0) { 914 i = min(i, len); 915 ivp->iov_base = cp; 916 ivp->iov_len = i; 917 ivp++; 918 len -= i; 919 } 920 mp = mp->m_next; 921 if (mp) { 922 i = mp->m_len; 923 cp = mtod(mp, caddr_t); 924 } 925 } 926 927 if (*stable == NFSWRITE_UNSTABLE) 928 ioflags = IO_NODELOCKED; 929 else 930 ioflags = (IO_SYNC | IO_NODELOCKED); 931 uiop->uio_resid = retlen; 932 uiop->uio_rw = UIO_WRITE; 933 uiop->uio_segflg = UIO_SYSSPACE; 934 NFSUIOPROC(uiop, p); 935 uiop->uio_offset = off; 936 nh = nfsrv_sequential_heuristic(uiop, vp); 937 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 938 /* XXX KDM make this more systematic? */ 939 nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid; 940 error = VOP_WRITE(vp, uiop, ioflags, cred); 941 if (error == 0) 942 nh->nh_nextoff = uiop->uio_offset; 943 free(iv, M_TEMP); 944 945 NFSEXITCODE(error); 946 return (error); 947 } 948 949 /* 950 * Common code for creating a regular file (plus special files for V2). 951 */ 952 int 953 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 954 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 955 int32_t *cverf, NFSDEV_T rdev, struct nfsexstuff *exp) 956 { 957 u_quad_t tempsize; 958 int error; 959 struct thread *p = curthread; 960 961 error = nd->nd_repstat; 962 if (!error && ndp->ni_vp == NULL) { 963 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 964 vrele(ndp->ni_startdir); 965 error = VOP_CREATE(ndp->ni_dvp, 966 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 967 /* For a pNFS server, create the data file on a DS. */ 968 if (error == 0 && nvap->na_type == VREG) { 969 /* 970 * Create a data file on a DS for a pNFS server. 971 * This function just returns if not 972 * running a pNFS DS or the creation fails. 973 */ 974 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 975 nd->nd_cred, p); 976 } 977 vput(ndp->ni_dvp); 978 nfsvno_relpathbuf(ndp); 979 if (!error) { 980 if (*exclusive_flagp) { 981 *exclusive_flagp = 0; 982 NFSVNO_ATTRINIT(nvap); 983 nvap->na_atime.tv_sec = cverf[0]; 984 nvap->na_atime.tv_nsec = cverf[1]; 985 error = VOP_SETATTR(ndp->ni_vp, 986 &nvap->na_vattr, nd->nd_cred); 987 if (error != 0) { 988 vput(ndp->ni_vp); 989 ndp->ni_vp = NULL; 990 error = NFSERR_NOTSUPP; 991 } 992 } 993 } 994 /* 995 * NFS V2 Only. nfsrvd_mknod() does this for V3. 996 * (This implies, just get out on an error.) 997 */ 998 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 999 nvap->na_type == VFIFO) { 1000 if (nvap->na_type == VCHR && rdev == 0xffffffff) 1001 nvap->na_type = VFIFO; 1002 if (nvap->na_type != VFIFO && 1003 (error = priv_check_cred(nd->nd_cred, PRIV_VFS_MKNOD_DEV))) { 1004 vrele(ndp->ni_startdir); 1005 nfsvno_relpathbuf(ndp); 1006 vput(ndp->ni_dvp); 1007 goto out; 1008 } 1009 nvap->na_rdev = rdev; 1010 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1011 &ndp->ni_cnd, &nvap->na_vattr); 1012 vput(ndp->ni_dvp); 1013 nfsvno_relpathbuf(ndp); 1014 vrele(ndp->ni_startdir); 1015 if (error) 1016 goto out; 1017 } else { 1018 vrele(ndp->ni_startdir); 1019 nfsvno_relpathbuf(ndp); 1020 vput(ndp->ni_dvp); 1021 error = ENXIO; 1022 goto out; 1023 } 1024 *vpp = ndp->ni_vp; 1025 } else { 1026 /* 1027 * Handle cases where error is already set and/or 1028 * the file exists. 1029 * 1 - clean up the lookup 1030 * 2 - iff !error and na_size set, truncate it 1031 */ 1032 vrele(ndp->ni_startdir); 1033 nfsvno_relpathbuf(ndp); 1034 *vpp = ndp->ni_vp; 1035 if (ndp->ni_dvp == *vpp) 1036 vrele(ndp->ni_dvp); 1037 else 1038 vput(ndp->ni_dvp); 1039 if (!error && nvap->na_size != VNOVAL) { 1040 error = nfsvno_accchk(*vpp, VWRITE, 1041 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1042 NFSACCCHK_VPISLOCKED, NULL); 1043 if (!error) { 1044 tempsize = nvap->na_size; 1045 NFSVNO_ATTRINIT(nvap); 1046 nvap->na_size = tempsize; 1047 error = VOP_SETATTR(*vpp, 1048 &nvap->na_vattr, nd->nd_cred); 1049 } 1050 } 1051 if (error) 1052 vput(*vpp); 1053 } 1054 1055 out: 1056 NFSEXITCODE(error); 1057 return (error); 1058 } 1059 1060 /* 1061 * Do a mknod vnode op. 1062 */ 1063 int 1064 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 1065 struct thread *p) 1066 { 1067 int error = 0; 1068 enum vtype vtyp; 1069 1070 vtyp = nvap->na_type; 1071 /* 1072 * Iff doesn't exist, create it. 1073 */ 1074 if (ndp->ni_vp) { 1075 vrele(ndp->ni_startdir); 1076 nfsvno_relpathbuf(ndp); 1077 vput(ndp->ni_dvp); 1078 vrele(ndp->ni_vp); 1079 error = EEXIST; 1080 goto out; 1081 } 1082 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1083 vrele(ndp->ni_startdir); 1084 nfsvno_relpathbuf(ndp); 1085 vput(ndp->ni_dvp); 1086 error = NFSERR_BADTYPE; 1087 goto out; 1088 } 1089 if (vtyp == VSOCK) { 1090 vrele(ndp->ni_startdir); 1091 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 1092 &ndp->ni_cnd, &nvap->na_vattr); 1093 vput(ndp->ni_dvp); 1094 nfsvno_relpathbuf(ndp); 1095 } else { 1096 if (nvap->na_type != VFIFO && 1097 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV))) { 1098 vrele(ndp->ni_startdir); 1099 nfsvno_relpathbuf(ndp); 1100 vput(ndp->ni_dvp); 1101 goto out; 1102 } 1103 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1104 &ndp->ni_cnd, &nvap->na_vattr); 1105 vput(ndp->ni_dvp); 1106 nfsvno_relpathbuf(ndp); 1107 vrele(ndp->ni_startdir); 1108 /* 1109 * Since VOP_MKNOD returns the ni_vp, I can't 1110 * see any reason to do the lookup. 1111 */ 1112 } 1113 1114 out: 1115 NFSEXITCODE(error); 1116 return (error); 1117 } 1118 1119 /* 1120 * Mkdir vnode op. 1121 */ 1122 int 1123 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 1124 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 1125 { 1126 int error = 0; 1127 1128 if (ndp->ni_vp != NULL) { 1129 if (ndp->ni_dvp == ndp->ni_vp) 1130 vrele(ndp->ni_dvp); 1131 else 1132 vput(ndp->ni_dvp); 1133 vrele(ndp->ni_vp); 1134 nfsvno_relpathbuf(ndp); 1135 error = EEXIST; 1136 goto out; 1137 } 1138 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1139 &nvap->na_vattr); 1140 vput(ndp->ni_dvp); 1141 nfsvno_relpathbuf(ndp); 1142 1143 out: 1144 NFSEXITCODE(error); 1145 return (error); 1146 } 1147 1148 /* 1149 * symlink vnode op. 1150 */ 1151 int 1152 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 1153 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 1154 struct nfsexstuff *exp) 1155 { 1156 int error = 0; 1157 1158 if (ndp->ni_vp) { 1159 vrele(ndp->ni_startdir); 1160 nfsvno_relpathbuf(ndp); 1161 if (ndp->ni_dvp == ndp->ni_vp) 1162 vrele(ndp->ni_dvp); 1163 else 1164 vput(ndp->ni_dvp); 1165 vrele(ndp->ni_vp); 1166 error = EEXIST; 1167 goto out; 1168 } 1169 1170 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1171 &nvap->na_vattr, pathcp); 1172 vput(ndp->ni_dvp); 1173 vrele(ndp->ni_startdir); 1174 nfsvno_relpathbuf(ndp); 1175 /* 1176 * Although FreeBSD still had the lookup code in 1177 * it for 7/current, there doesn't seem to be any 1178 * point, since VOP_SYMLINK() returns the ni_vp. 1179 * Just vput it for v2. 1180 */ 1181 if (!not_v2 && !error) 1182 vput(ndp->ni_vp); 1183 1184 out: 1185 NFSEXITCODE(error); 1186 return (error); 1187 } 1188 1189 /* 1190 * Parse symbolic link arguments. 1191 * This function has an ugly side effect. It will malloc() an area for 1192 * the symlink and set iov_base to point to it, only if it succeeds. 1193 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1194 * be FREE'd later. 1195 */ 1196 int 1197 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1198 struct thread *p, char **pathcpp, int *lenp) 1199 { 1200 u_int32_t *tl; 1201 char *pathcp = NULL; 1202 int error = 0, len; 1203 struct nfsv2_sattr *sp; 1204 1205 *pathcpp = NULL; 1206 *lenp = 0; 1207 if ((nd->nd_flag & ND_NFSV3) && 1208 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1209 goto nfsmout; 1210 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1211 len = fxdr_unsigned(int, *tl); 1212 if (len > NFS_MAXPATHLEN || len <= 0) { 1213 error = EBADRPC; 1214 goto nfsmout; 1215 } 1216 pathcp = malloc(len + 1, M_TEMP, M_WAITOK); 1217 error = nfsrv_mtostr(nd, pathcp, len); 1218 if (error) 1219 goto nfsmout; 1220 if (nd->nd_flag & ND_NFSV2) { 1221 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1222 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1223 } 1224 *pathcpp = pathcp; 1225 *lenp = len; 1226 NFSEXITCODE2(0, nd); 1227 return (0); 1228 nfsmout: 1229 if (pathcp) 1230 free(pathcp, M_TEMP); 1231 NFSEXITCODE2(error, nd); 1232 return (error); 1233 } 1234 1235 /* 1236 * Remove a non-directory object. 1237 */ 1238 int 1239 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1240 struct thread *p, struct nfsexstuff *exp) 1241 { 1242 struct vnode *vp, *dsdvp[NFSDEV_MAXMIRRORS]; 1243 int error = 0, mirrorcnt; 1244 char fname[PNFS_FILENAME_LEN + 1]; 1245 fhandle_t fh; 1246 1247 vp = ndp->ni_vp; 1248 dsdvp[0] = NULL; 1249 if (vp->v_type == VDIR) 1250 error = NFSERR_ISDIR; 1251 else if (is_v4) 1252 error = nfsrv_checkremove(vp, 1, p); 1253 if (error == 0) 1254 nfsrv_pnfsremovesetup(vp, p, dsdvp, &mirrorcnt, fname, &fh); 1255 if (!error) 1256 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1257 if (error == 0 && dsdvp[0] != NULL) 1258 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1259 if (ndp->ni_dvp == vp) 1260 vrele(ndp->ni_dvp); 1261 else 1262 vput(ndp->ni_dvp); 1263 vput(vp); 1264 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1265 nfsvno_relpathbuf(ndp); 1266 NFSEXITCODE(error); 1267 return (error); 1268 } 1269 1270 /* 1271 * Remove a directory. 1272 */ 1273 int 1274 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1275 struct thread *p, struct nfsexstuff *exp) 1276 { 1277 struct vnode *vp; 1278 int error = 0; 1279 1280 vp = ndp->ni_vp; 1281 if (vp->v_type != VDIR) { 1282 error = ENOTDIR; 1283 goto out; 1284 } 1285 /* 1286 * No rmdir "." please. 1287 */ 1288 if (ndp->ni_dvp == vp) { 1289 error = EINVAL; 1290 goto out; 1291 } 1292 /* 1293 * The root of a mounted filesystem cannot be deleted. 1294 */ 1295 if (vp->v_vflag & VV_ROOT) 1296 error = EBUSY; 1297 out: 1298 if (!error) 1299 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1300 if (ndp->ni_dvp == vp) 1301 vrele(ndp->ni_dvp); 1302 else 1303 vput(ndp->ni_dvp); 1304 vput(vp); 1305 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1306 nfsvno_relpathbuf(ndp); 1307 NFSEXITCODE(error); 1308 return (error); 1309 } 1310 1311 /* 1312 * Rename vnode op. 1313 */ 1314 int 1315 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1316 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1317 { 1318 struct vnode *fvp, *tvp, *tdvp, *dsdvp[NFSDEV_MAXMIRRORS]; 1319 int error = 0, mirrorcnt; 1320 char fname[PNFS_FILENAME_LEN + 1]; 1321 fhandle_t fh; 1322 1323 dsdvp[0] = NULL; 1324 fvp = fromndp->ni_vp; 1325 if (ndstat) { 1326 vrele(fromndp->ni_dvp); 1327 vrele(fvp); 1328 error = ndstat; 1329 goto out1; 1330 } 1331 tdvp = tondp->ni_dvp; 1332 tvp = tondp->ni_vp; 1333 if (tvp != NULL) { 1334 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1335 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1336 goto out; 1337 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1338 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1339 goto out; 1340 } 1341 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1342 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1343 goto out; 1344 } 1345 1346 /* 1347 * A rename to '.' or '..' results in a prematurely 1348 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1349 * here. 1350 */ 1351 if ((tondp->ni_cnd.cn_namelen == 1 && 1352 tondp->ni_cnd.cn_nameptr[0] == '.') || 1353 (tondp->ni_cnd.cn_namelen == 2 && 1354 tondp->ni_cnd.cn_nameptr[0] == '.' && 1355 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1356 error = EINVAL; 1357 goto out; 1358 } 1359 } 1360 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1361 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1362 goto out; 1363 } 1364 if (fvp->v_mount != tdvp->v_mount) { 1365 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1366 goto out; 1367 } 1368 if (fvp == tdvp) { 1369 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1370 goto out; 1371 } 1372 if (fvp == tvp) { 1373 /* 1374 * If source and destination are the same, there is nothing to 1375 * do. Set error to -1 to indicate this. 1376 */ 1377 error = -1; 1378 goto out; 1379 } 1380 if (ndflag & ND_NFSV4) { 1381 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1382 error = nfsrv_checkremove(fvp, 0, p); 1383 NFSVOPUNLOCK(fvp, 0); 1384 } else 1385 error = EPERM; 1386 if (tvp && !error) 1387 error = nfsrv_checkremove(tvp, 1, p); 1388 } else { 1389 /* 1390 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1391 * that the NFSv4 client won't be confused by the rename. 1392 * Since nfsd_recalldelegation() can only be called on an 1393 * unlocked vnode at this point and fvp is the file that will 1394 * still exist after the rename, just do fvp. 1395 */ 1396 nfsd_recalldelegation(fvp, p); 1397 } 1398 if (error == 0 && tvp != NULL) { 1399 nfsrv_pnfsremovesetup(tvp, p, dsdvp, &mirrorcnt, fname, &fh); 1400 NFSD_DEBUG(4, "nfsvno_rename: pnfsremovesetup" 1401 " dsdvp=%p\n", dsdvp[0]); 1402 } 1403 out: 1404 if (!error) { 1405 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1406 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1407 &tondp->ni_cnd); 1408 } else { 1409 if (tdvp == tvp) 1410 vrele(tdvp); 1411 else 1412 vput(tdvp); 1413 if (tvp) 1414 vput(tvp); 1415 vrele(fromndp->ni_dvp); 1416 vrele(fvp); 1417 if (error == -1) 1418 error = 0; 1419 } 1420 1421 /* 1422 * If dsdvp[0] != NULL, it was set up by nfsrv_pnfsremovesetup() and 1423 * if the rename succeeded, the DS file for the tvp needs to be 1424 * removed. 1425 */ 1426 if (error == 0 && dsdvp[0] != NULL) { 1427 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1428 NFSD_DEBUG(4, "nfsvno_rename: pnfsremove\n"); 1429 } 1430 1431 vrele(tondp->ni_startdir); 1432 nfsvno_relpathbuf(tondp); 1433 out1: 1434 vrele(fromndp->ni_startdir); 1435 nfsvno_relpathbuf(fromndp); 1436 NFSEXITCODE(error); 1437 return (error); 1438 } 1439 1440 /* 1441 * Link vnode op. 1442 */ 1443 int 1444 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1445 struct thread *p, struct nfsexstuff *exp) 1446 { 1447 struct vnode *xp; 1448 int error = 0; 1449 1450 xp = ndp->ni_vp; 1451 if (xp != NULL) { 1452 error = EEXIST; 1453 } else { 1454 xp = ndp->ni_dvp; 1455 if (vp->v_mount != xp->v_mount) 1456 error = EXDEV; 1457 } 1458 if (!error) { 1459 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1460 if ((vp->v_iflag & VI_DOOMED) == 0) 1461 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1462 else 1463 error = EPERM; 1464 if (ndp->ni_dvp == vp) 1465 vrele(ndp->ni_dvp); 1466 else 1467 vput(ndp->ni_dvp); 1468 NFSVOPUNLOCK(vp, 0); 1469 } else { 1470 if (ndp->ni_dvp == ndp->ni_vp) 1471 vrele(ndp->ni_dvp); 1472 else 1473 vput(ndp->ni_dvp); 1474 if (ndp->ni_vp) 1475 vrele(ndp->ni_vp); 1476 } 1477 nfsvno_relpathbuf(ndp); 1478 NFSEXITCODE(error); 1479 return (error); 1480 } 1481 1482 /* 1483 * Do the fsync() appropriate for the commit. 1484 */ 1485 int 1486 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1487 struct thread *td) 1488 { 1489 int error = 0; 1490 1491 /* 1492 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1493 * file is done. At this time VOP_FSYNC does not accept offset and 1494 * byte count parameters so call VOP_FSYNC the whole file for now. 1495 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1496 * File systems that do not use the buffer cache (as indicated 1497 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1498 */ 1499 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1500 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1501 /* 1502 * Give up and do the whole thing 1503 */ 1504 if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { 1505 VM_OBJECT_WLOCK(vp->v_object); 1506 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1507 VM_OBJECT_WUNLOCK(vp->v_object); 1508 } 1509 error = VOP_FSYNC(vp, MNT_WAIT, td); 1510 } else { 1511 /* 1512 * Locate and synchronously write any buffers that fall 1513 * into the requested range. Note: we are assuming that 1514 * f_iosize is a power of 2. 1515 */ 1516 int iosize = vp->v_mount->mnt_stat.f_iosize; 1517 int iomask = iosize - 1; 1518 struct bufobj *bo; 1519 daddr_t lblkno; 1520 1521 /* 1522 * Align to iosize boundary, super-align to page boundary. 1523 */ 1524 if (off & iomask) { 1525 cnt += off & iomask; 1526 off &= ~(u_quad_t)iomask; 1527 } 1528 if (off & PAGE_MASK) { 1529 cnt += off & PAGE_MASK; 1530 off &= ~(u_quad_t)PAGE_MASK; 1531 } 1532 lblkno = off / iosize; 1533 1534 if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { 1535 VM_OBJECT_WLOCK(vp->v_object); 1536 vm_object_page_clean(vp->v_object, off, off + cnt, 1537 OBJPC_SYNC); 1538 VM_OBJECT_WUNLOCK(vp->v_object); 1539 } 1540 1541 bo = &vp->v_bufobj; 1542 BO_LOCK(bo); 1543 while (cnt > 0) { 1544 struct buf *bp; 1545 1546 /* 1547 * If we have a buffer and it is marked B_DELWRI we 1548 * have to lock and write it. Otherwise the prior 1549 * write is assumed to have already been committed. 1550 * 1551 * gbincore() can return invalid buffers now so we 1552 * have to check that bit as well (though B_DELWRI 1553 * should not be set if B_INVAL is set there could be 1554 * a race here since we haven't locked the buffer). 1555 */ 1556 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1557 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1558 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1559 BO_LOCK(bo); 1560 continue; /* retry */ 1561 } 1562 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1563 B_DELWRI) { 1564 bremfree(bp); 1565 bp->b_flags &= ~B_ASYNC; 1566 bwrite(bp); 1567 ++nfs_commit_miss; 1568 } else 1569 BUF_UNLOCK(bp); 1570 BO_LOCK(bo); 1571 } 1572 ++nfs_commit_blks; 1573 if (cnt < iosize) 1574 break; 1575 cnt -= iosize; 1576 ++lblkno; 1577 } 1578 BO_UNLOCK(bo); 1579 } 1580 NFSEXITCODE(error); 1581 return (error); 1582 } 1583 1584 /* 1585 * Statfs vnode op. 1586 */ 1587 int 1588 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1589 { 1590 struct statfs *tsf; 1591 int error; 1592 1593 tsf = NULL; 1594 if (nfsrv_devidcnt > 0) { 1595 /* For a pNFS service, get the DS numbers. */ 1596 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK | M_ZERO); 1597 error = nfsrv_pnfsstatfs(tsf, vp->v_mount); 1598 if (error != 0) { 1599 free(tsf, M_TEMP); 1600 tsf = NULL; 1601 } 1602 } 1603 error = VFS_STATFS(vp->v_mount, sf); 1604 if (error == 0) { 1605 if (tsf != NULL) { 1606 sf->f_blocks = tsf->f_blocks; 1607 sf->f_bavail = tsf->f_bavail; 1608 sf->f_bfree = tsf->f_bfree; 1609 sf->f_bsize = tsf->f_bsize; 1610 } 1611 /* 1612 * Since NFS handles these values as unsigned on the 1613 * wire, there is no way to represent negative values, 1614 * so set them to 0. Without this, they will appear 1615 * to be very large positive values for clients like 1616 * Solaris10. 1617 */ 1618 if (sf->f_bavail < 0) 1619 sf->f_bavail = 0; 1620 if (sf->f_ffree < 0) 1621 sf->f_ffree = 0; 1622 } 1623 free(tsf, M_TEMP); 1624 NFSEXITCODE(error); 1625 return (error); 1626 } 1627 1628 /* 1629 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1630 * must handle nfsrv_opencheck() calls after any other access checks. 1631 */ 1632 void 1633 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1634 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1635 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1636 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, 1637 struct nfsexstuff *exp, struct vnode **vpp) 1638 { 1639 struct vnode *vp = NULL; 1640 u_quad_t tempsize; 1641 struct nfsexstuff nes; 1642 struct thread *p = curthread; 1643 1644 if (ndp->ni_vp == NULL) 1645 nd->nd_repstat = nfsrv_opencheck(clientid, 1646 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1647 if (!nd->nd_repstat) { 1648 if (ndp->ni_vp == NULL) { 1649 vrele(ndp->ni_startdir); 1650 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1651 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1652 /* For a pNFS server, create the data file on a DS. */ 1653 if (nd->nd_repstat == 0) { 1654 /* 1655 * Create a data file on a DS for a pNFS server. 1656 * This function just returns if not 1657 * running a pNFS DS or the creation fails. 1658 */ 1659 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1660 cred, p); 1661 } 1662 vput(ndp->ni_dvp); 1663 nfsvno_relpathbuf(ndp); 1664 if (!nd->nd_repstat) { 1665 if (*exclusive_flagp) { 1666 *exclusive_flagp = 0; 1667 NFSVNO_ATTRINIT(nvap); 1668 nvap->na_atime.tv_sec = cverf[0]; 1669 nvap->na_atime.tv_nsec = cverf[1]; 1670 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1671 &nvap->na_vattr, cred); 1672 if (nd->nd_repstat != 0) { 1673 vput(ndp->ni_vp); 1674 ndp->ni_vp = NULL; 1675 nd->nd_repstat = NFSERR_NOTSUPP; 1676 } else 1677 NFSSETBIT_ATTRBIT(attrbitp, 1678 NFSATTRBIT_TIMEACCESS); 1679 } else { 1680 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1681 aclp, p, attrbitp, exp); 1682 } 1683 } 1684 vp = ndp->ni_vp; 1685 } else { 1686 if (ndp->ni_startdir) 1687 vrele(ndp->ni_startdir); 1688 nfsvno_relpathbuf(ndp); 1689 vp = ndp->ni_vp; 1690 if (create == NFSV4OPEN_CREATE) { 1691 if (ndp->ni_dvp == vp) 1692 vrele(ndp->ni_dvp); 1693 else 1694 vput(ndp->ni_dvp); 1695 } 1696 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1697 if (ndp->ni_cnd.cn_flags & RDONLY) 1698 NFSVNO_SETEXRDONLY(&nes); 1699 else 1700 NFSVNO_EXINIT(&nes); 1701 nd->nd_repstat = nfsvno_accchk(vp, 1702 VWRITE, cred, &nes, p, 1703 NFSACCCHK_NOOVERRIDE, 1704 NFSACCCHK_VPISLOCKED, NULL); 1705 nd->nd_repstat = nfsrv_opencheck(clientid, 1706 stateidp, stp, vp, nd, p, nd->nd_repstat); 1707 if (!nd->nd_repstat) { 1708 tempsize = nvap->na_size; 1709 NFSVNO_ATTRINIT(nvap); 1710 nvap->na_size = tempsize; 1711 nd->nd_repstat = VOP_SETATTR(vp, 1712 &nvap->na_vattr, cred); 1713 } 1714 } else if (vp->v_type == VREG) { 1715 nd->nd_repstat = nfsrv_opencheck(clientid, 1716 stateidp, stp, vp, nd, p, nd->nd_repstat); 1717 } 1718 } 1719 } else { 1720 if (ndp->ni_cnd.cn_flags & HASBUF) 1721 nfsvno_relpathbuf(ndp); 1722 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1723 vrele(ndp->ni_startdir); 1724 if (ndp->ni_dvp == ndp->ni_vp) 1725 vrele(ndp->ni_dvp); 1726 else 1727 vput(ndp->ni_dvp); 1728 if (ndp->ni_vp) 1729 vput(ndp->ni_vp); 1730 } 1731 } 1732 *vpp = vp; 1733 1734 NFSEXITCODE2(0, nd); 1735 } 1736 1737 /* 1738 * Updates the file rev and sets the mtime and ctime 1739 * to the current clock time, returning the va_filerev and va_Xtime 1740 * values. 1741 * Return ESTALE to indicate the vnode is VI_DOOMED. 1742 */ 1743 int 1744 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1745 struct nfsrv_descript *nd, struct thread *p) 1746 { 1747 struct vattr va; 1748 1749 VATTR_NULL(&va); 1750 vfs_timestamp(&va.va_mtime); 1751 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1752 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1753 if ((vp->v_iflag & VI_DOOMED) != 0) 1754 return (ESTALE); 1755 } 1756 (void) VOP_SETATTR(vp, &va, nd->nd_cred); 1757 (void) nfsvno_getattr(vp, nvap, nd, p, 1, NULL); 1758 return (0); 1759 } 1760 1761 /* 1762 * Glue routine to nfsv4_fillattr(). 1763 */ 1764 int 1765 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1766 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1767 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1768 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1769 { 1770 struct statfs *sf; 1771 int error; 1772 1773 sf = NULL; 1774 if (nfsrv_devidcnt > 0 && 1775 (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEAVAIL) || 1776 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEFREE) || 1777 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACETOTAL))) { 1778 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK | M_ZERO); 1779 error = nfsrv_pnfsstatfs(sf, mp); 1780 if (error != 0) { 1781 free(sf, M_TEMP); 1782 sf = NULL; 1783 } 1784 } 1785 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1786 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1787 mounted_on_fileno, sf); 1788 free(sf, M_TEMP); 1789 NFSEXITCODE2(0, nd); 1790 return (error); 1791 } 1792 1793 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1794 /* 1795 * nfs readdir service 1796 * - mallocs what it thinks is enough to read 1797 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1798 * - calls VOP_READDIR() 1799 * - loops around building the reply 1800 * if the output generated exceeds count break out of loop 1801 * The NFSM_CLGET macro is used here so that the reply will be packed 1802 * tightly in mbuf clusters. 1803 * - it trims out records with d_fileno == 0 1804 * this doesn't matter for Unix clients, but they might confuse clients 1805 * for other os'. 1806 * - it trims out records with d_type == DT_WHT 1807 * these cannot be seen through NFS (unless we extend the protocol) 1808 * The alternate call nfsrvd_readdirplus() does lookups as well. 1809 * PS: The NFS protocol spec. does not clarify what the "count" byte 1810 * argument is a count of.. just name strings and file id's or the 1811 * entire reply rpc or ... 1812 * I tried just file name and id sizes and it confused the Sun client, 1813 * so I am using the full rpc size now. The "paranoia.." comment refers 1814 * to including the status longwords that are not a part of the dir. 1815 * "entry" structures, but are in the rpc. 1816 */ 1817 int 1818 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1819 struct vnode *vp, struct nfsexstuff *exp) 1820 { 1821 struct dirent *dp; 1822 u_int32_t *tl; 1823 int dirlen; 1824 char *cpos, *cend, *rbuf; 1825 struct nfsvattr at; 1826 int nlen, error = 0, getret = 1; 1827 int siz, cnt, fullsiz, eofflag, ncookies; 1828 u_int64_t off, toff, verf __unused; 1829 u_long *cookies = NULL, *cookiep; 1830 struct uio io; 1831 struct iovec iv; 1832 int is_ufs; 1833 struct thread *p = curthread; 1834 1835 if (nd->nd_repstat) { 1836 nfsrv_postopattr(nd, getret, &at); 1837 goto out; 1838 } 1839 if (nd->nd_flag & ND_NFSV2) { 1840 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1841 off = fxdr_unsigned(u_quad_t, *tl++); 1842 } else { 1843 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1844 off = fxdr_hyper(tl); 1845 tl += 2; 1846 verf = fxdr_hyper(tl); 1847 tl += 2; 1848 } 1849 toff = off; 1850 cnt = fxdr_unsigned(int, *tl); 1851 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1852 cnt = NFS_SRVMAXDATA(nd); 1853 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1854 fullsiz = siz; 1855 if (nd->nd_flag & ND_NFSV3) { 1856 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, 1857 NULL); 1858 #if 0 1859 /* 1860 * va_filerev is not sufficient as a cookie verifier, 1861 * since it is not supposed to change when entries are 1862 * removed/added unless that offset cookies returned to 1863 * the client are no longer valid. 1864 */ 1865 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1866 nd->nd_repstat = NFSERR_BAD_COOKIE; 1867 #endif 1868 } 1869 if (!nd->nd_repstat && vp->v_type != VDIR) 1870 nd->nd_repstat = NFSERR_NOTDIR; 1871 if (nd->nd_repstat == 0 && cnt == 0) { 1872 if (nd->nd_flag & ND_NFSV2) 1873 /* NFSv2 does not have NFSERR_TOOSMALL */ 1874 nd->nd_repstat = EPERM; 1875 else 1876 nd->nd_repstat = NFSERR_TOOSMALL; 1877 } 1878 if (!nd->nd_repstat) 1879 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1880 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1881 NFSACCCHK_VPISLOCKED, NULL); 1882 if (nd->nd_repstat) { 1883 vput(vp); 1884 if (nd->nd_flag & ND_NFSV3) 1885 nfsrv_postopattr(nd, getret, &at); 1886 goto out; 1887 } 1888 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1889 rbuf = malloc(siz, M_TEMP, M_WAITOK); 1890 again: 1891 eofflag = 0; 1892 if (cookies) { 1893 free(cookies, M_TEMP); 1894 cookies = NULL; 1895 } 1896 1897 iv.iov_base = rbuf; 1898 iv.iov_len = siz; 1899 io.uio_iov = &iv; 1900 io.uio_iovcnt = 1; 1901 io.uio_offset = (off_t)off; 1902 io.uio_resid = siz; 1903 io.uio_segflg = UIO_SYSSPACE; 1904 io.uio_rw = UIO_READ; 1905 io.uio_td = NULL; 1906 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1907 &cookies); 1908 off = (u_int64_t)io.uio_offset; 1909 if (io.uio_resid) 1910 siz -= io.uio_resid; 1911 1912 if (!cookies && !nd->nd_repstat) 1913 nd->nd_repstat = NFSERR_PERM; 1914 if (nd->nd_flag & ND_NFSV3) { 1915 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 1916 if (!nd->nd_repstat) 1917 nd->nd_repstat = getret; 1918 } 1919 1920 /* 1921 * Handles the failed cases. nd->nd_repstat == 0 past here. 1922 */ 1923 if (nd->nd_repstat) { 1924 vput(vp); 1925 free(rbuf, M_TEMP); 1926 if (cookies) 1927 free(cookies, M_TEMP); 1928 if (nd->nd_flag & ND_NFSV3) 1929 nfsrv_postopattr(nd, getret, &at); 1930 goto out; 1931 } 1932 /* 1933 * If nothing read, return eof 1934 * rpc reply 1935 */ 1936 if (siz == 0) { 1937 vput(vp); 1938 if (nd->nd_flag & ND_NFSV2) { 1939 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1940 } else { 1941 nfsrv_postopattr(nd, getret, &at); 1942 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1943 txdr_hyper(at.na_filerev, tl); 1944 tl += 2; 1945 } 1946 *tl++ = newnfs_false; 1947 *tl = newnfs_true; 1948 free(rbuf, M_TEMP); 1949 free(cookies, M_TEMP); 1950 goto out; 1951 } 1952 1953 /* 1954 * Check for degenerate cases of nothing useful read. 1955 * If so go try again 1956 */ 1957 cpos = rbuf; 1958 cend = rbuf + siz; 1959 dp = (struct dirent *)cpos; 1960 cookiep = cookies; 1961 1962 /* 1963 * For some reason FreeBSD's ufs_readdir() chooses to back the 1964 * directory offset up to a block boundary, so it is necessary to 1965 * skip over the records that precede the requested offset. This 1966 * requires the assumption that file offset cookies monotonically 1967 * increase. 1968 */ 1969 while (cpos < cend && ncookies > 0 && 1970 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 1971 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 1972 cpos += dp->d_reclen; 1973 dp = (struct dirent *)cpos; 1974 cookiep++; 1975 ncookies--; 1976 } 1977 if (cpos >= cend || ncookies == 0) { 1978 siz = fullsiz; 1979 toff = off; 1980 goto again; 1981 } 1982 vput(vp); 1983 1984 /* 1985 * dirlen is the size of the reply, including all XDR and must 1986 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 1987 * if the XDR should be included in "count", but to be safe, we do. 1988 * (Include the two booleans at the end of the reply in dirlen now.) 1989 */ 1990 if (nd->nd_flag & ND_NFSV3) { 1991 nfsrv_postopattr(nd, getret, &at); 1992 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1993 txdr_hyper(at.na_filerev, tl); 1994 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 1995 } else { 1996 dirlen = 2 * NFSX_UNSIGNED; 1997 } 1998 1999 /* Loop through the records and build reply */ 2000 while (cpos < cend && ncookies > 0) { 2001 nlen = dp->d_namlen; 2002 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2003 nlen <= NFS_MAXNAMLEN) { 2004 if (nd->nd_flag & ND_NFSV3) 2005 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2006 else 2007 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2008 if (dirlen > cnt) { 2009 eofflag = 0; 2010 break; 2011 } 2012 2013 /* 2014 * Build the directory record xdr from 2015 * the dirent entry. 2016 */ 2017 if (nd->nd_flag & ND_NFSV3) { 2018 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2019 *tl++ = newnfs_true; 2020 *tl++ = 0; 2021 } else { 2022 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2023 *tl++ = newnfs_true; 2024 } 2025 *tl = txdr_unsigned(dp->d_fileno); 2026 (void) nfsm_strtom(nd, dp->d_name, nlen); 2027 if (nd->nd_flag & ND_NFSV3) { 2028 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2029 *tl++ = 0; 2030 } else 2031 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 2032 *tl = txdr_unsigned(*cookiep); 2033 } 2034 cpos += dp->d_reclen; 2035 dp = (struct dirent *)cpos; 2036 cookiep++; 2037 ncookies--; 2038 } 2039 if (cpos < cend) 2040 eofflag = 0; 2041 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2042 *tl++ = newnfs_false; 2043 if (eofflag) 2044 *tl = newnfs_true; 2045 else 2046 *tl = newnfs_false; 2047 free(rbuf, M_TEMP); 2048 free(cookies, M_TEMP); 2049 2050 out: 2051 NFSEXITCODE2(0, nd); 2052 return (0); 2053 nfsmout: 2054 vput(vp); 2055 NFSEXITCODE2(error, nd); 2056 return (error); 2057 } 2058 2059 /* 2060 * Readdirplus for V3 and Readdir for V4. 2061 */ 2062 int 2063 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 2064 struct vnode *vp, struct nfsexstuff *exp) 2065 { 2066 struct dirent *dp; 2067 u_int32_t *tl; 2068 int dirlen; 2069 char *cpos, *cend, *rbuf; 2070 struct vnode *nvp; 2071 fhandle_t nfh; 2072 struct nfsvattr nva, at, *nvap = &nva; 2073 struct mbuf *mb0, *mb1; 2074 struct nfsreferral *refp; 2075 int nlen, r, error = 0, getret = 1, usevget = 1; 2076 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 2077 caddr_t bpos0, bpos1; 2078 u_int64_t off, toff, verf; 2079 u_long *cookies = NULL, *cookiep; 2080 nfsattrbit_t attrbits, rderrbits, savbits; 2081 struct uio io; 2082 struct iovec iv; 2083 struct componentname cn; 2084 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 2085 struct mount *mp, *new_mp; 2086 uint64_t mounted_on_fileno; 2087 struct thread *p = curthread; 2088 2089 if (nd->nd_repstat) { 2090 nfsrv_postopattr(nd, getret, &at); 2091 goto out; 2092 } 2093 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2094 off = fxdr_hyper(tl); 2095 toff = off; 2096 tl += 2; 2097 verf = fxdr_hyper(tl); 2098 tl += 2; 2099 siz = fxdr_unsigned(int, *tl++); 2100 cnt = fxdr_unsigned(int, *tl); 2101 2102 /* 2103 * Use the server's maximum data transfer size as the upper bound 2104 * on reply datalen. 2105 */ 2106 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2107 cnt = NFS_SRVMAXDATA(nd); 2108 2109 /* 2110 * siz is a "hint" of how much directory information (name, fileid, 2111 * cookie) should be in the reply. At least one client "hints" 0, 2112 * so I set it to cnt for that case. I also round it up to the 2113 * next multiple of DIRBLKSIZ. 2114 * Since the size of a Readdirplus directory entry reply will always 2115 * be greater than a directory entry returned by VOP_READDIR(), it 2116 * does not make sense to read more than NFS_SRVMAXDATA() via 2117 * VOP_READDIR(). 2118 */ 2119 if (siz <= 0) 2120 siz = cnt; 2121 else if (siz > NFS_SRVMAXDATA(nd)) 2122 siz = NFS_SRVMAXDATA(nd); 2123 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2124 2125 if (nd->nd_flag & ND_NFSV4) { 2126 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 2127 if (error) 2128 goto nfsmout; 2129 NFSSET_ATTRBIT(&savbits, &attrbits); 2130 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits, nd); 2131 NFSZERO_ATTRBIT(&rderrbits); 2132 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 2133 } else { 2134 NFSZERO_ATTRBIT(&attrbits); 2135 } 2136 fullsiz = siz; 2137 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2138 #if 0 2139 if (!nd->nd_repstat) { 2140 if (off && verf != at.na_filerev) { 2141 /* 2142 * va_filerev is not sufficient as a cookie verifier, 2143 * since it is not supposed to change when entries are 2144 * removed/added unless that offset cookies returned to 2145 * the client are no longer valid. 2146 */ 2147 if (nd->nd_flag & ND_NFSV4) { 2148 nd->nd_repstat = NFSERR_NOTSAME; 2149 } else { 2150 nd->nd_repstat = NFSERR_BAD_COOKIE; 2151 } 2152 } 2153 } 2154 #endif 2155 if (!nd->nd_repstat && vp->v_type != VDIR) 2156 nd->nd_repstat = NFSERR_NOTDIR; 2157 if (!nd->nd_repstat && cnt == 0) 2158 nd->nd_repstat = NFSERR_TOOSMALL; 2159 if (!nd->nd_repstat) 2160 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2161 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2162 NFSACCCHK_VPISLOCKED, NULL); 2163 if (nd->nd_repstat) { 2164 vput(vp); 2165 if (nd->nd_flag & ND_NFSV3) 2166 nfsrv_postopattr(nd, getret, &at); 2167 goto out; 2168 } 2169 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2170 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 2171 2172 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2173 again: 2174 eofflag = 0; 2175 if (cookies) { 2176 free(cookies, M_TEMP); 2177 cookies = NULL; 2178 } 2179 2180 iv.iov_base = rbuf; 2181 iv.iov_len = siz; 2182 io.uio_iov = &iv; 2183 io.uio_iovcnt = 1; 2184 io.uio_offset = (off_t)off; 2185 io.uio_resid = siz; 2186 io.uio_segflg = UIO_SYSSPACE; 2187 io.uio_rw = UIO_READ; 2188 io.uio_td = NULL; 2189 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2190 &cookies); 2191 off = (u_int64_t)io.uio_offset; 2192 if (io.uio_resid) 2193 siz -= io.uio_resid; 2194 2195 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2196 2197 if (!cookies && !nd->nd_repstat) 2198 nd->nd_repstat = NFSERR_PERM; 2199 if (!nd->nd_repstat) 2200 nd->nd_repstat = getret; 2201 if (nd->nd_repstat) { 2202 vput(vp); 2203 if (cookies) 2204 free(cookies, M_TEMP); 2205 free(rbuf, M_TEMP); 2206 if (nd->nd_flag & ND_NFSV3) 2207 nfsrv_postopattr(nd, getret, &at); 2208 goto out; 2209 } 2210 /* 2211 * If nothing read, return eof 2212 * rpc reply 2213 */ 2214 if (siz == 0) { 2215 vput(vp); 2216 if (nd->nd_flag & ND_NFSV3) 2217 nfsrv_postopattr(nd, getret, &at); 2218 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2219 txdr_hyper(at.na_filerev, tl); 2220 tl += 2; 2221 *tl++ = newnfs_false; 2222 *tl = newnfs_true; 2223 free(cookies, M_TEMP); 2224 free(rbuf, M_TEMP); 2225 goto out; 2226 } 2227 2228 /* 2229 * Check for degenerate cases of nothing useful read. 2230 * If so go try again 2231 */ 2232 cpos = rbuf; 2233 cend = rbuf + siz; 2234 dp = (struct dirent *)cpos; 2235 cookiep = cookies; 2236 2237 /* 2238 * For some reason FreeBSD's ufs_readdir() chooses to back the 2239 * directory offset up to a block boundary, so it is necessary to 2240 * skip over the records that precede the requested offset. This 2241 * requires the assumption that file offset cookies monotonically 2242 * increase. 2243 */ 2244 while (cpos < cend && ncookies > 0 && 2245 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2246 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 2247 ((nd->nd_flag & ND_NFSV4) && 2248 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 2249 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 2250 cpos += dp->d_reclen; 2251 dp = (struct dirent *)cpos; 2252 cookiep++; 2253 ncookies--; 2254 } 2255 if (cpos >= cend || ncookies == 0) { 2256 siz = fullsiz; 2257 toff = off; 2258 goto again; 2259 } 2260 2261 /* 2262 * Busy the file system so that the mount point won't go away 2263 * and, as such, VFS_VGET() can be used safely. 2264 */ 2265 mp = vp->v_mount; 2266 vfs_ref(mp); 2267 NFSVOPUNLOCK(vp, 0); 2268 nd->nd_repstat = vfs_busy(mp, 0); 2269 vfs_rel(mp); 2270 if (nd->nd_repstat != 0) { 2271 vrele(vp); 2272 free(cookies, M_TEMP); 2273 free(rbuf, M_TEMP); 2274 if (nd->nd_flag & ND_NFSV3) 2275 nfsrv_postopattr(nd, getret, &at); 2276 goto out; 2277 } 2278 2279 /* 2280 * Check to see if entries in this directory can be safely acquired 2281 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2282 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2283 * automount of the snapshot directory that is required will 2284 * be done. 2285 * This needs to be done here for NFSv4, since NFSv4 never does 2286 * a VFS_VGET() for "." or "..". 2287 */ 2288 if (is_zfs == 1) { 2289 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2290 if (r == EOPNOTSUPP) { 2291 usevget = 0; 2292 cn.cn_nameiop = LOOKUP; 2293 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2294 cn.cn_cred = nd->nd_cred; 2295 cn.cn_thread = p; 2296 } else if (r == 0) 2297 vput(nvp); 2298 } 2299 2300 /* 2301 * Save this position, in case there is an error before one entry 2302 * is created. 2303 */ 2304 mb0 = nd->nd_mb; 2305 bpos0 = nd->nd_bpos; 2306 2307 /* 2308 * Fill in the first part of the reply. 2309 * dirlen is the reply length in bytes and cannot exceed cnt. 2310 * (Include the two booleans at the end of the reply in dirlen now, 2311 * so we recognize when we have exceeded cnt.) 2312 */ 2313 if (nd->nd_flag & ND_NFSV3) { 2314 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2315 nfsrv_postopattr(nd, getret, &at); 2316 } else { 2317 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2318 } 2319 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2320 txdr_hyper(at.na_filerev, tl); 2321 2322 /* 2323 * Save this position, in case there is an empty reply needed. 2324 */ 2325 mb1 = nd->nd_mb; 2326 bpos1 = nd->nd_bpos; 2327 2328 /* Loop through the records and build reply */ 2329 entrycnt = 0; 2330 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2331 nlen = dp->d_namlen; 2332 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2333 nlen <= NFS_MAXNAMLEN && 2334 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2335 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2336 || (nlen == 1 && dp->d_name[0] != '.'))) { 2337 /* 2338 * Save the current position in the reply, in case 2339 * this entry exceeds cnt. 2340 */ 2341 mb1 = nd->nd_mb; 2342 bpos1 = nd->nd_bpos; 2343 2344 /* 2345 * For readdir_and_lookup get the vnode using 2346 * the file number. 2347 */ 2348 nvp = NULL; 2349 refp = NULL; 2350 r = 0; 2351 at_root = 0; 2352 needs_unbusy = 0; 2353 new_mp = mp; 2354 mounted_on_fileno = (uint64_t)dp->d_fileno; 2355 if ((nd->nd_flag & ND_NFSV3) || 2356 NFSNONZERO_ATTRBIT(&savbits)) { 2357 if (nd->nd_flag & ND_NFSV4) 2358 refp = nfsv4root_getreferral(NULL, 2359 vp, dp->d_fileno); 2360 if (refp == NULL) { 2361 if (usevget) 2362 r = VFS_VGET(mp, dp->d_fileno, 2363 LK_SHARED, &nvp); 2364 else 2365 r = EOPNOTSUPP; 2366 if (r == EOPNOTSUPP) { 2367 if (usevget) { 2368 usevget = 0; 2369 cn.cn_nameiop = LOOKUP; 2370 cn.cn_lkflags = 2371 LK_SHARED | 2372 LK_RETRY; 2373 cn.cn_cred = 2374 nd->nd_cred; 2375 cn.cn_thread = p; 2376 } 2377 cn.cn_nameptr = dp->d_name; 2378 cn.cn_namelen = nlen; 2379 cn.cn_flags = ISLASTCN | 2380 NOFOLLOW | LOCKLEAF; 2381 if (nlen == 2 && 2382 dp->d_name[0] == '.' && 2383 dp->d_name[1] == '.') 2384 cn.cn_flags |= 2385 ISDOTDOT; 2386 if (NFSVOPLOCK(vp, LK_SHARED) 2387 != 0) { 2388 nd->nd_repstat = EPERM; 2389 break; 2390 } 2391 if ((vp->v_vflag & VV_ROOT) != 0 2392 && (cn.cn_flags & ISDOTDOT) 2393 != 0) { 2394 vref(vp); 2395 nvp = vp; 2396 r = 0; 2397 } else { 2398 r = VOP_LOOKUP(vp, &nvp, 2399 &cn); 2400 if (vp != nvp) 2401 NFSVOPUNLOCK(vp, 2402 0); 2403 } 2404 } 2405 2406 /* 2407 * For NFSv4, check to see if nvp is 2408 * a mount point and get the mount 2409 * point vnode, as required. 2410 */ 2411 if (r == 0 && 2412 nfsrv_enable_crossmntpt != 0 && 2413 (nd->nd_flag & ND_NFSV4) != 0 && 2414 nvp->v_type == VDIR && 2415 nvp->v_mountedhere != NULL) { 2416 new_mp = nvp->v_mountedhere; 2417 r = vfs_busy(new_mp, 0); 2418 vput(nvp); 2419 nvp = NULL; 2420 if (r == 0) { 2421 r = VFS_ROOT(new_mp, 2422 LK_SHARED, &nvp); 2423 needs_unbusy = 1; 2424 if (r == 0) 2425 at_root = 1; 2426 } 2427 } 2428 } 2429 2430 /* 2431 * If we failed to look up the entry, then it 2432 * has become invalid, most likely removed. 2433 */ 2434 if (r != 0) { 2435 if (needs_unbusy) 2436 vfs_unbusy(new_mp); 2437 goto invalid; 2438 } 2439 KASSERT(refp != NULL || nvp != NULL, 2440 ("%s: undetected lookup error", __func__)); 2441 2442 if (refp == NULL && 2443 ((nd->nd_flag & ND_NFSV3) || 2444 NFSNONZERO_ATTRBIT(&attrbits))) { 2445 r = nfsvno_getfh(nvp, &nfh, p); 2446 if (!r) 2447 r = nfsvno_getattr(nvp, nvap, nd, p, 2448 1, &attrbits); 2449 if (r == 0 && is_zfs == 1 && 2450 nfsrv_enable_crossmntpt != 0 && 2451 (nd->nd_flag & ND_NFSV4) != 0 && 2452 nvp->v_type == VDIR && 2453 vp->v_mount != nvp->v_mount) { 2454 /* 2455 * For a ZFS snapshot, there is a 2456 * pseudo mount that does not set 2457 * v_mountedhere, so it needs to 2458 * be detected via a different 2459 * mount structure. 2460 */ 2461 at_root = 1; 2462 if (new_mp == mp) 2463 new_mp = nvp->v_mount; 2464 } 2465 } 2466 2467 /* 2468 * If we failed to get attributes of the entry, 2469 * then just skip it for NFSv3 (the traditional 2470 * behavior in the old NFS server). 2471 * For NFSv4 the behavior is controlled by 2472 * RDATTRERROR: we either ignore the error or 2473 * fail the request. 2474 * Note that RDATTRERROR is never set for NFSv3. 2475 */ 2476 if (r != 0) { 2477 if (!NFSISSET_ATTRBIT(&attrbits, 2478 NFSATTRBIT_RDATTRERROR)) { 2479 vput(nvp); 2480 if (needs_unbusy != 0) 2481 vfs_unbusy(new_mp); 2482 if ((nd->nd_flag & ND_NFSV3)) 2483 goto invalid; 2484 nd->nd_repstat = r; 2485 break; 2486 } 2487 } 2488 } 2489 2490 /* 2491 * Build the directory record xdr 2492 */ 2493 if (nd->nd_flag & ND_NFSV3) { 2494 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2495 *tl++ = newnfs_true; 2496 *tl++ = 0; 2497 *tl = txdr_unsigned(dp->d_fileno); 2498 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2499 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2500 *tl++ = 0; 2501 *tl = txdr_unsigned(*cookiep); 2502 nfsrv_postopattr(nd, 0, nvap); 2503 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2504 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2505 if (nvp != NULL) 2506 vput(nvp); 2507 } else { 2508 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2509 *tl++ = newnfs_true; 2510 *tl++ = 0; 2511 *tl = txdr_unsigned(*cookiep); 2512 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2513 if (nvp != NULL) { 2514 supports_nfsv4acls = 2515 nfs_supportsnfsv4acls(nvp); 2516 NFSVOPUNLOCK(nvp, 0); 2517 } else 2518 supports_nfsv4acls = 0; 2519 if (refp != NULL) { 2520 dirlen += nfsrv_putreferralattr(nd, 2521 &savbits, refp, 0, 2522 &nd->nd_repstat); 2523 if (nd->nd_repstat) { 2524 if (nvp != NULL) 2525 vrele(nvp); 2526 if (needs_unbusy != 0) 2527 vfs_unbusy(new_mp); 2528 break; 2529 } 2530 } else if (r) { 2531 dirlen += nfsvno_fillattr(nd, new_mp, 2532 nvp, nvap, &nfh, r, &rderrbits, 2533 nd->nd_cred, p, isdgram, 0, 2534 supports_nfsv4acls, at_root, 2535 mounted_on_fileno); 2536 } else { 2537 dirlen += nfsvno_fillattr(nd, new_mp, 2538 nvp, nvap, &nfh, r, &attrbits, 2539 nd->nd_cred, p, isdgram, 0, 2540 supports_nfsv4acls, at_root, 2541 mounted_on_fileno); 2542 } 2543 if (nvp != NULL) 2544 vrele(nvp); 2545 dirlen += (3 * NFSX_UNSIGNED); 2546 } 2547 if (needs_unbusy != 0) 2548 vfs_unbusy(new_mp); 2549 if (dirlen <= cnt) 2550 entrycnt++; 2551 } 2552 invalid: 2553 cpos += dp->d_reclen; 2554 dp = (struct dirent *)cpos; 2555 cookiep++; 2556 ncookies--; 2557 } 2558 vrele(vp); 2559 vfs_unbusy(mp); 2560 2561 /* 2562 * If dirlen > cnt, we must strip off the last entry. If that 2563 * results in an empty reply, report NFSERR_TOOSMALL. 2564 */ 2565 if (dirlen > cnt || nd->nd_repstat) { 2566 if (!nd->nd_repstat && entrycnt == 0) 2567 nd->nd_repstat = NFSERR_TOOSMALL; 2568 if (nd->nd_repstat) { 2569 newnfs_trimtrailing(nd, mb0, bpos0); 2570 if (nd->nd_flag & ND_NFSV3) 2571 nfsrv_postopattr(nd, getret, &at); 2572 } else 2573 newnfs_trimtrailing(nd, mb1, bpos1); 2574 eofflag = 0; 2575 } else if (cpos < cend) 2576 eofflag = 0; 2577 if (!nd->nd_repstat) { 2578 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2579 *tl++ = newnfs_false; 2580 if (eofflag) 2581 *tl = newnfs_true; 2582 else 2583 *tl = newnfs_false; 2584 } 2585 free(cookies, M_TEMP); 2586 free(rbuf, M_TEMP); 2587 2588 out: 2589 NFSEXITCODE2(0, nd); 2590 return (0); 2591 nfsmout: 2592 vput(vp); 2593 NFSEXITCODE2(error, nd); 2594 return (error); 2595 } 2596 2597 /* 2598 * Get the settable attributes out of the mbuf list. 2599 * (Return 0 or EBADRPC) 2600 */ 2601 int 2602 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2603 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2604 { 2605 u_int32_t *tl; 2606 struct nfsv2_sattr *sp; 2607 int error = 0, toclient = 0; 2608 2609 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2610 case ND_NFSV2: 2611 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2612 /* 2613 * Some old clients didn't fill in the high order 16bits. 2614 * --> check the low order 2 bytes for 0xffff 2615 */ 2616 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2617 nvap->na_mode = nfstov_mode(sp->sa_mode); 2618 if (sp->sa_uid != newnfs_xdrneg1) 2619 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2620 if (sp->sa_gid != newnfs_xdrneg1) 2621 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2622 if (sp->sa_size != newnfs_xdrneg1) 2623 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2624 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2625 #ifdef notyet 2626 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2627 #else 2628 nvap->na_atime.tv_sec = 2629 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2630 nvap->na_atime.tv_nsec = 0; 2631 #endif 2632 } 2633 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2634 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2635 break; 2636 case ND_NFSV3: 2637 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2638 if (*tl == newnfs_true) { 2639 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2640 nvap->na_mode = nfstov_mode(*tl); 2641 } 2642 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2643 if (*tl == newnfs_true) { 2644 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2645 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2646 } 2647 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2648 if (*tl == newnfs_true) { 2649 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2650 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2651 } 2652 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2653 if (*tl == newnfs_true) { 2654 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2655 nvap->na_size = fxdr_hyper(tl); 2656 } 2657 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2658 switch (fxdr_unsigned(int, *tl)) { 2659 case NFSV3SATTRTIME_TOCLIENT: 2660 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2661 fxdr_nfsv3time(tl, &nvap->na_atime); 2662 toclient = 1; 2663 break; 2664 case NFSV3SATTRTIME_TOSERVER: 2665 vfs_timestamp(&nvap->na_atime); 2666 nvap->na_vaflags |= VA_UTIMES_NULL; 2667 break; 2668 } 2669 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2670 switch (fxdr_unsigned(int, *tl)) { 2671 case NFSV3SATTRTIME_TOCLIENT: 2672 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2673 fxdr_nfsv3time(tl, &nvap->na_mtime); 2674 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2675 break; 2676 case NFSV3SATTRTIME_TOSERVER: 2677 vfs_timestamp(&nvap->na_mtime); 2678 if (!toclient) 2679 nvap->na_vaflags |= VA_UTIMES_NULL; 2680 break; 2681 } 2682 break; 2683 case ND_NFSV4: 2684 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2685 } 2686 nfsmout: 2687 NFSEXITCODE2(error, nd); 2688 return (error); 2689 } 2690 2691 /* 2692 * Handle the setable attributes for V4. 2693 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2694 */ 2695 int 2696 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2697 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2698 { 2699 u_int32_t *tl; 2700 int attrsum = 0; 2701 int i, j; 2702 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2703 int moderet, toclient = 0; 2704 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2705 uid_t uid; 2706 gid_t gid; 2707 u_short mode, mask; /* Same type as va_mode. */ 2708 struct vattr va; 2709 2710 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2711 if (error) 2712 goto nfsmout; 2713 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2714 attrsize = fxdr_unsigned(int, *tl); 2715 2716 /* 2717 * Loop around getting the setable attributes. If an unsupported 2718 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2719 */ 2720 if (retnotsup) { 2721 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2722 bitpos = NFSATTRBIT_MAX; 2723 } else { 2724 bitpos = 0; 2725 } 2726 moderet = 0; 2727 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2728 if (attrsum > attrsize) { 2729 error = NFSERR_BADXDR; 2730 goto nfsmout; 2731 } 2732 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2733 switch (bitpos) { 2734 case NFSATTRBIT_SIZE: 2735 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2736 if (vp != NULL && vp->v_type != VREG) { 2737 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2738 NFSERR_INVAL; 2739 goto nfsmout; 2740 } 2741 nvap->na_size = fxdr_hyper(tl); 2742 attrsum += NFSX_HYPER; 2743 break; 2744 case NFSATTRBIT_ACL: 2745 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2746 p); 2747 if (error) 2748 goto nfsmout; 2749 if (aceerr && !nd->nd_repstat) 2750 nd->nd_repstat = aceerr; 2751 attrsum += aclsize; 2752 break; 2753 case NFSATTRBIT_ARCHIVE: 2754 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2755 if (!nd->nd_repstat) 2756 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2757 attrsum += NFSX_UNSIGNED; 2758 break; 2759 case NFSATTRBIT_HIDDEN: 2760 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2761 if (!nd->nd_repstat) 2762 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2763 attrsum += NFSX_UNSIGNED; 2764 break; 2765 case NFSATTRBIT_MIMETYPE: 2766 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2767 i = fxdr_unsigned(int, *tl); 2768 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2769 if (error) 2770 goto nfsmout; 2771 if (!nd->nd_repstat) 2772 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2773 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2774 break; 2775 case NFSATTRBIT_MODE: 2776 moderet = NFSERR_INVAL; /* Can't do MODESETMASKED. */ 2777 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2778 nvap->na_mode = nfstov_mode(*tl); 2779 attrsum += NFSX_UNSIGNED; 2780 break; 2781 case NFSATTRBIT_OWNER: 2782 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2783 j = fxdr_unsigned(int, *tl); 2784 if (j < 0) { 2785 error = NFSERR_BADXDR; 2786 goto nfsmout; 2787 } 2788 if (j > NFSV4_SMALLSTR) 2789 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2790 else 2791 cp = namestr; 2792 error = nfsrv_mtostr(nd, cp, j); 2793 if (error) { 2794 if (j > NFSV4_SMALLSTR) 2795 free(cp, M_NFSSTRING); 2796 goto nfsmout; 2797 } 2798 if (!nd->nd_repstat) { 2799 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, 2800 &uid); 2801 if (!nd->nd_repstat) 2802 nvap->na_uid = uid; 2803 } 2804 if (j > NFSV4_SMALLSTR) 2805 free(cp, M_NFSSTRING); 2806 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2807 break; 2808 case NFSATTRBIT_OWNERGROUP: 2809 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2810 j = fxdr_unsigned(int, *tl); 2811 if (j < 0) { 2812 error = NFSERR_BADXDR; 2813 goto nfsmout; 2814 } 2815 if (j > NFSV4_SMALLSTR) 2816 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2817 else 2818 cp = namestr; 2819 error = nfsrv_mtostr(nd, cp, j); 2820 if (error) { 2821 if (j > NFSV4_SMALLSTR) 2822 free(cp, M_NFSSTRING); 2823 goto nfsmout; 2824 } 2825 if (!nd->nd_repstat) { 2826 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, 2827 &gid); 2828 if (!nd->nd_repstat) 2829 nvap->na_gid = gid; 2830 } 2831 if (j > NFSV4_SMALLSTR) 2832 free(cp, M_NFSSTRING); 2833 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2834 break; 2835 case NFSATTRBIT_SYSTEM: 2836 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2837 if (!nd->nd_repstat) 2838 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2839 attrsum += NFSX_UNSIGNED; 2840 break; 2841 case NFSATTRBIT_TIMEACCESSSET: 2842 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2843 attrsum += NFSX_UNSIGNED; 2844 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2845 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2846 fxdr_nfsv4time(tl, &nvap->na_atime); 2847 toclient = 1; 2848 attrsum += NFSX_V4TIME; 2849 } else { 2850 vfs_timestamp(&nvap->na_atime); 2851 nvap->na_vaflags |= VA_UTIMES_NULL; 2852 } 2853 break; 2854 case NFSATTRBIT_TIMEBACKUP: 2855 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2856 if (!nd->nd_repstat) 2857 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2858 attrsum += NFSX_V4TIME; 2859 break; 2860 case NFSATTRBIT_TIMECREATE: 2861 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2862 if (!nd->nd_repstat) 2863 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2864 attrsum += NFSX_V4TIME; 2865 break; 2866 case NFSATTRBIT_TIMEMODIFYSET: 2867 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2868 attrsum += NFSX_UNSIGNED; 2869 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2870 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2871 fxdr_nfsv4time(tl, &nvap->na_mtime); 2872 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2873 attrsum += NFSX_V4TIME; 2874 } else { 2875 vfs_timestamp(&nvap->na_mtime); 2876 if (!toclient) 2877 nvap->na_vaflags |= VA_UTIMES_NULL; 2878 } 2879 break; 2880 case NFSATTRBIT_MODESETMASKED: 2881 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 2882 mode = fxdr_unsigned(u_short, *tl++); 2883 mask = fxdr_unsigned(u_short, *tl); 2884 /* 2885 * vp == NULL implies an Open/Create operation. 2886 * This attribute can only be used for Setattr and 2887 * only for NFSv4.1 or higher. 2888 * If moderet != 0, a mode attribute has also been 2889 * specified and this attribute cannot be done in the 2890 * same Setattr operation. 2891 */ 2892 if ((nd->nd_flag & ND_NFSV41) == 0) 2893 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2894 else if ((mode & ~07777) != 0 || (mask & ~07777) != 0 || 2895 vp == NULL) 2896 nd->nd_repstat = NFSERR_INVAL; 2897 else if (moderet == 0) 2898 moderet = VOP_GETATTR(vp, &va, nd->nd_cred); 2899 if (moderet == 0) 2900 nvap->na_mode = (mode & mask) | 2901 (va.va_mode & ~mask); 2902 else 2903 nd->nd_repstat = moderet; 2904 attrsum += 2 * NFSX_UNSIGNED; 2905 break; 2906 default: 2907 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2908 /* 2909 * set bitpos so we drop out of the loop. 2910 */ 2911 bitpos = NFSATTRBIT_MAX; 2912 break; 2913 } 2914 } 2915 2916 /* 2917 * some clients pad the attrlist, so we need to skip over the 2918 * padding. 2919 */ 2920 if (attrsum > attrsize) { 2921 error = NFSERR_BADXDR; 2922 } else { 2923 attrsize = NFSM_RNDUP(attrsize); 2924 if (attrsum < attrsize) 2925 error = nfsm_advance(nd, attrsize - attrsum, -1); 2926 } 2927 nfsmout: 2928 NFSEXITCODE2(error, nd); 2929 return (error); 2930 } 2931 2932 /* 2933 * Check/setup export credentials. 2934 */ 2935 int 2936 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2937 struct ucred *credanon) 2938 { 2939 int error = 0; 2940 2941 /* 2942 * Check/setup credentials. 2943 */ 2944 if (nd->nd_flag & ND_GSS) 2945 exp->nes_exflag &= ~MNT_EXPORTANON; 2946 2947 /* 2948 * Check to see if the operation is allowed for this security flavor. 2949 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 2950 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 2951 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 2952 */ 2953 if (nfsvno_testexp(nd, exp) && 2954 nd->nd_procnum != NFSV4OP_SECINFO && 2955 nd->nd_procnum != NFSPROC_FSINFO) { 2956 if (nd->nd_flag & ND_NFSV4) 2957 error = NFSERR_WRONGSEC; 2958 else 2959 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 2960 goto out; 2961 } 2962 2963 /* 2964 * Check to see if the file system is exported V4 only. 2965 */ 2966 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 2967 error = NFSERR_PROGNOTV4; 2968 goto out; 2969 } 2970 2971 /* 2972 * Now, map the user credentials. 2973 * (Note that ND_AUTHNONE will only be set for an NFSv3 2974 * Fsinfo RPC. If set for anything else, this code might need 2975 * to change.) 2976 */ 2977 if (NFSVNO_EXPORTED(exp)) { 2978 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 2979 NFSVNO_EXPORTANON(exp) || 2980 (nd->nd_flag & ND_AUTHNONE) != 0) { 2981 nd->nd_cred->cr_uid = credanon->cr_uid; 2982 nd->nd_cred->cr_gid = credanon->cr_gid; 2983 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 2984 credanon->cr_groups); 2985 } else if ((nd->nd_flag & ND_GSS) == 0) { 2986 /* 2987 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 2988 * if there is a replacement credential with a group 2989 * list set up by "nfsuserd -manage-gids". 2990 * If there is no replacement, nfsrv_getgrpscred() 2991 * simply returns its argument. 2992 */ 2993 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 2994 } 2995 } 2996 2997 out: 2998 NFSEXITCODE2(error, nd); 2999 return (error); 3000 } 3001 3002 /* 3003 * Check exports. 3004 */ 3005 int 3006 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 3007 struct ucred **credp) 3008 { 3009 int i, error, *secflavors; 3010 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 } 3019 } else { 3020 /* Copy the security flavors. */ 3021 for (i = 0; i < exp->nes_numsecflavor; i++) 3022 exp->nes_secflavors[i] = secflavors[i]; 3023 } 3024 NFSEXITCODE(error); 3025 return (error); 3026 } 3027 3028 /* 3029 * Get a vnode for a file handle and export stuff. 3030 */ 3031 int 3032 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 3033 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 3034 struct ucred **credp) 3035 { 3036 int i, error, *secflavors; 3037 3038 *credp = NULL; 3039 exp->nes_numsecflavor = 0; 3040 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 3041 if (error != 0) 3042 /* Make sure the server replies ESTALE to the client. */ 3043 error = ESTALE; 3044 if (nam && !error) { 3045 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3046 &exp->nes_numsecflavor, &secflavors); 3047 if (error) { 3048 if (nfs_rootfhset) { 3049 exp->nes_exflag = 0; 3050 exp->nes_numsecflavor = 0; 3051 error = 0; 3052 } else { 3053 vput(*vpp); 3054 } 3055 } else { 3056 /* Copy the security flavors. */ 3057 for (i = 0; i < exp->nes_numsecflavor; i++) 3058 exp->nes_secflavors[i] = secflavors[i]; 3059 } 3060 } 3061 NFSEXITCODE(error); 3062 return (error); 3063 } 3064 3065 /* 3066 * nfsd_fhtovp() - convert a fh to a vnode ptr 3067 * - look up fsid in mount list (if not found ret error) 3068 * - get vp and export rights by calling nfsvno_fhtovp() 3069 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 3070 * for AUTH_SYS 3071 * - if mpp != NULL, return the mount point so that it can 3072 * be used for vn_finished_write() by the caller 3073 */ 3074 void 3075 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 3076 struct vnode **vpp, struct nfsexstuff *exp, 3077 struct mount **mpp, int startwrite) 3078 { 3079 struct mount *mp; 3080 struct ucred *credanon; 3081 fhandle_t *fhp; 3082 3083 fhp = (fhandle_t *)nfp->nfsrvfh_data; 3084 /* 3085 * Check for the special case of the nfsv4root_fh. 3086 */ 3087 mp = vfs_busyfs(&fhp->fh_fsid); 3088 if (mpp != NULL) 3089 *mpp = mp; 3090 if (mp == NULL) { 3091 *vpp = NULL; 3092 nd->nd_repstat = ESTALE; 3093 goto out; 3094 } 3095 3096 if (startwrite) { 3097 vn_start_write(NULL, mpp, V_WAIT); 3098 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 3099 lktype = LK_EXCLUSIVE; 3100 } 3101 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 3102 &credanon); 3103 vfs_unbusy(mp); 3104 3105 /* 3106 * For NFSv4 without a pseudo root fs, unexported file handles 3107 * can be returned, so that Lookup works everywhere. 3108 */ 3109 if (!nd->nd_repstat && exp->nes_exflag == 0 && 3110 !(nd->nd_flag & ND_NFSV4)) { 3111 vput(*vpp); 3112 nd->nd_repstat = EACCES; 3113 } 3114 3115 /* 3116 * Personally, I've never seen any point in requiring a 3117 * reserved port#, since only in the rare case where the 3118 * clients are all boxes with secure system privileges, 3119 * does it provide any enhanced security, but... some people 3120 * believe it to be useful and keep putting this code back in. 3121 * (There is also some "security checker" out there that 3122 * complains if the nfs server doesn't enforce this.) 3123 * However, note the following: 3124 * RFC3530 (NFSv4) specifies that a reserved port# not be 3125 * required. 3126 * RFC2623 recommends that, if a reserved port# is checked for, 3127 * that there be a way to turn that off--> ifdef'd. 3128 */ 3129 #ifdef NFS_REQRSVPORT 3130 if (!nd->nd_repstat) { 3131 struct sockaddr_in *saddr; 3132 struct sockaddr_in6 *saddr6; 3133 3134 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3135 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 3136 if (!(nd->nd_flag & ND_NFSV4) && 3137 ((saddr->sin_family == AF_INET && 3138 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 3139 (saddr6->sin6_family == AF_INET6 && 3140 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 3141 vput(*vpp); 3142 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3143 } 3144 } 3145 #endif /* NFS_REQRSVPORT */ 3146 3147 /* 3148 * Check/setup credentials. 3149 */ 3150 if (!nd->nd_repstat) { 3151 nd->nd_saveduid = nd->nd_cred->cr_uid; 3152 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 3153 if (nd->nd_repstat) 3154 vput(*vpp); 3155 } 3156 if (credanon != NULL) 3157 crfree(credanon); 3158 if (nd->nd_repstat) { 3159 if (startwrite) 3160 vn_finished_write(mp); 3161 *vpp = NULL; 3162 if (mpp != NULL) 3163 *mpp = NULL; 3164 } 3165 3166 out: 3167 NFSEXITCODE2(0, nd); 3168 } 3169 3170 /* 3171 * glue for fp. 3172 */ 3173 static int 3174 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 3175 { 3176 struct filedesc *fdp; 3177 struct file *fp; 3178 int error = 0; 3179 3180 fdp = p->td_proc->p_fd; 3181 if (fd < 0 || fd >= fdp->fd_nfiles || 3182 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 3183 error = EBADF; 3184 goto out; 3185 } 3186 *fpp = fp; 3187 3188 out: 3189 NFSEXITCODE(error); 3190 return (error); 3191 } 3192 3193 /* 3194 * Called from nfssvc() to update the exports list. Just call 3195 * vfs_export(). This has to be done, since the v4 root fake fs isn't 3196 * in the mount list. 3197 */ 3198 int 3199 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 3200 { 3201 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 3202 int error = 0; 3203 struct nameidata nd; 3204 fhandle_t fh; 3205 3206 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 3207 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 3208 nfs_rootfhset = 0; 3209 else if (error == 0) { 3210 if (nfsexargp->fspec == NULL) { 3211 error = EPERM; 3212 goto out; 3213 } 3214 /* 3215 * If fspec != NULL, this is the v4root path. 3216 */ 3217 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 3218 nfsexargp->fspec, p); 3219 if ((error = namei(&nd)) != 0) 3220 goto out; 3221 error = nfsvno_getfh(nd.ni_vp, &fh, p); 3222 vrele(nd.ni_vp); 3223 if (!error) { 3224 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 3225 NFSBCOPY((caddr_t)&fh, 3226 nfs_rootfh.nfsrvfh_data, 3227 sizeof (fhandle_t)); 3228 nfs_rootfhset = 1; 3229 } 3230 } 3231 3232 out: 3233 NFSEXITCODE(error); 3234 return (error); 3235 } 3236 3237 /* 3238 * This function needs to test to see if the system is near its limit 3239 * for memory allocation via malloc() or mget() and return True iff 3240 * either of these resources are near their limit. 3241 * XXX (For now, this is just a stub.) 3242 */ 3243 int nfsrv_testmalloclimit = 0; 3244 int 3245 nfsrv_mallocmget_limit(void) 3246 { 3247 static int printmesg = 0; 3248 static int testval = 1; 3249 3250 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 3251 if ((printmesg++ % 100) == 0) 3252 printf("nfsd: malloc/mget near limit\n"); 3253 return (1); 3254 } 3255 return (0); 3256 } 3257 3258 /* 3259 * BSD specific initialization of a mount point. 3260 */ 3261 void 3262 nfsd_mntinit(void) 3263 { 3264 static int inited = 0; 3265 3266 if (inited) 3267 return; 3268 inited = 1; 3269 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 3270 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 3271 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist); 3272 nfsv4root_mnt.mnt_export = NULL; 3273 TAILQ_INIT(&nfsv4root_opt); 3274 TAILQ_INIT(&nfsv4root_newopt); 3275 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 3276 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 3277 nfsv4root_mnt.mnt_nvnodelistsize = 0; 3278 nfsv4root_mnt.mnt_activevnodelistsize = 0; 3279 } 3280 3281 /* 3282 * Get a vnode for a file handle, without checking exports, etc. 3283 */ 3284 struct vnode * 3285 nfsvno_getvp(fhandle_t *fhp) 3286 { 3287 struct mount *mp; 3288 struct vnode *vp; 3289 int error; 3290 3291 mp = vfs_busyfs(&fhp->fh_fsid); 3292 if (mp == NULL) 3293 return (NULL); 3294 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 3295 vfs_unbusy(mp); 3296 if (error) 3297 return (NULL); 3298 return (vp); 3299 } 3300 3301 /* 3302 * Do a local VOP_ADVLOCK(). 3303 */ 3304 int 3305 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3306 u_int64_t end, struct thread *td) 3307 { 3308 int error = 0; 3309 struct flock fl; 3310 u_int64_t tlen; 3311 3312 if (nfsrv_dolocallocks == 0) 3313 goto out; 3314 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3315 3316 fl.l_whence = SEEK_SET; 3317 fl.l_type = ftype; 3318 fl.l_start = (off_t)first; 3319 if (end == NFS64BITSSET) { 3320 fl.l_len = 0; 3321 } else { 3322 tlen = end - first; 3323 fl.l_len = (off_t)tlen; 3324 } 3325 /* 3326 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3327 * values for all calls, so that all locks will be held by the 3328 * nfsd server. (The nfsd server handles conflicts between the 3329 * various clients.) 3330 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3331 * bytes, so it can't be put in l_sysid. 3332 */ 3333 if (nfsv4_sysid == 0) 3334 nfsv4_sysid = nlm_acquire_next_sysid(); 3335 fl.l_pid = (pid_t)0; 3336 fl.l_sysid = (int)nfsv4_sysid; 3337 3338 if (ftype == F_UNLCK) 3339 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3340 (F_POSIX | F_REMOTE)); 3341 else 3342 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3343 (F_POSIX | F_REMOTE)); 3344 3345 out: 3346 NFSEXITCODE(error); 3347 return (error); 3348 } 3349 3350 /* 3351 * Check the nfsv4 root exports. 3352 */ 3353 int 3354 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3355 { 3356 struct ucred *credanon; 3357 int exflags, error = 0, numsecflavor, *secflavors, i; 3358 3359 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3360 &credanon, &numsecflavor, &secflavors); 3361 if (error) { 3362 error = NFSERR_PROGUNAVAIL; 3363 goto out; 3364 } 3365 if (credanon != NULL) 3366 crfree(credanon); 3367 for (i = 0; i < numsecflavor; i++) { 3368 if (secflavors[i] == AUTH_SYS) 3369 nd->nd_flag |= ND_EXAUTHSYS; 3370 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3371 nd->nd_flag |= ND_EXGSS; 3372 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3373 nd->nd_flag |= ND_EXGSSINTEGRITY; 3374 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3375 nd->nd_flag |= ND_EXGSSPRIVACY; 3376 } 3377 3378 out: 3379 NFSEXITCODE(error); 3380 return (error); 3381 } 3382 3383 /* 3384 * Nfs server pseudo system call for the nfsd's 3385 */ 3386 /* 3387 * MPSAFE 3388 */ 3389 static int 3390 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3391 { 3392 struct file *fp; 3393 struct nfsd_addsock_args sockarg; 3394 struct nfsd_nfsd_args nfsdarg; 3395 struct nfsd_nfsd_oargs onfsdarg; 3396 struct nfsd_pnfsd_args pnfsdarg; 3397 struct vnode *vp, *nvp, *curdvp; 3398 struct pnfsdsfile *pf; 3399 struct nfsdevice *ds, *fds; 3400 cap_rights_t rights; 3401 int buflen, error, ret; 3402 char *buf, *cp, *cp2, *cp3; 3403 char fname[PNFS_FILENAME_LEN + 1]; 3404 3405 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3406 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3407 if (error) 3408 goto out; 3409 /* 3410 * Since we don't know what rights might be required, 3411 * pretend that we need them all. It is better to be too 3412 * careful than too reckless. 3413 */ 3414 error = fget(td, sockarg.sock, 3415 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3416 if (error != 0) 3417 goto out; 3418 if (fp->f_type != DTYPE_SOCKET) { 3419 fdrop(fp, td); 3420 error = EPERM; 3421 goto out; 3422 } 3423 error = nfsrvd_addsock(fp); 3424 fdrop(fp, td); 3425 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3426 if (uap->argp == NULL) { 3427 error = EINVAL; 3428 goto out; 3429 } 3430 if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) { 3431 error = copyin(uap->argp, &onfsdarg, sizeof(onfsdarg)); 3432 if (error == 0) { 3433 nfsdarg.principal = onfsdarg.principal; 3434 nfsdarg.minthreads = onfsdarg.minthreads; 3435 nfsdarg.maxthreads = onfsdarg.maxthreads; 3436 nfsdarg.version = 1; 3437 nfsdarg.addr = NULL; 3438 nfsdarg.addrlen = 0; 3439 nfsdarg.dnshost = NULL; 3440 nfsdarg.dnshostlen = 0; 3441 nfsdarg.dspath = NULL; 3442 nfsdarg.dspathlen = 0; 3443 nfsdarg.mdspath = NULL; 3444 nfsdarg.mdspathlen = 0; 3445 nfsdarg.mirrorcnt = 1; 3446 } 3447 } else 3448 error = copyin(uap->argp, &nfsdarg, sizeof(nfsdarg)); 3449 if (error) 3450 goto out; 3451 if (nfsdarg.addrlen > 0 && nfsdarg.addrlen < 10000 && 3452 nfsdarg.dnshostlen > 0 && nfsdarg.dnshostlen < 10000 && 3453 nfsdarg.dspathlen > 0 && nfsdarg.dspathlen < 10000 && 3454 nfsdarg.mdspathlen > 0 && nfsdarg.mdspathlen < 10000 && 3455 nfsdarg.mirrorcnt >= 1 && 3456 nfsdarg.mirrorcnt <= NFSDEV_MAXMIRRORS && 3457 nfsdarg.addr != NULL && nfsdarg.dnshost != NULL && 3458 nfsdarg.dspath != NULL && nfsdarg.mdspath != NULL) { 3459 NFSD_DEBUG(1, "addrlen=%d dspathlen=%d dnslen=%d" 3460 " mdspathlen=%d mirrorcnt=%d\n", nfsdarg.addrlen, 3461 nfsdarg.dspathlen, nfsdarg.dnshostlen, 3462 nfsdarg.mdspathlen, nfsdarg.mirrorcnt); 3463 cp = malloc(nfsdarg.addrlen + 1, M_TEMP, M_WAITOK); 3464 error = copyin(nfsdarg.addr, cp, nfsdarg.addrlen); 3465 if (error != 0) { 3466 free(cp, M_TEMP); 3467 goto out; 3468 } 3469 cp[nfsdarg.addrlen] = '\0'; /* Ensure nul term. */ 3470 nfsdarg.addr = cp; 3471 cp = malloc(nfsdarg.dnshostlen + 1, M_TEMP, M_WAITOK); 3472 error = copyin(nfsdarg.dnshost, cp, nfsdarg.dnshostlen); 3473 if (error != 0) { 3474 free(nfsdarg.addr, M_TEMP); 3475 free(cp, M_TEMP); 3476 goto out; 3477 } 3478 cp[nfsdarg.dnshostlen] = '\0'; /* Ensure nul term. */ 3479 nfsdarg.dnshost = cp; 3480 cp = malloc(nfsdarg.dspathlen + 1, M_TEMP, M_WAITOK); 3481 error = copyin(nfsdarg.dspath, cp, nfsdarg.dspathlen); 3482 if (error != 0) { 3483 free(nfsdarg.addr, M_TEMP); 3484 free(nfsdarg.dnshost, M_TEMP); 3485 free(cp, M_TEMP); 3486 goto out; 3487 } 3488 cp[nfsdarg.dspathlen] = '\0'; /* Ensure nul term. */ 3489 nfsdarg.dspath = cp; 3490 cp = malloc(nfsdarg.mdspathlen + 1, M_TEMP, M_WAITOK); 3491 error = copyin(nfsdarg.mdspath, cp, nfsdarg.mdspathlen); 3492 if (error != 0) { 3493 free(nfsdarg.addr, M_TEMP); 3494 free(nfsdarg.dnshost, M_TEMP); 3495 free(nfsdarg.dspath, M_TEMP); 3496 free(cp, M_TEMP); 3497 goto out; 3498 } 3499 cp[nfsdarg.mdspathlen] = '\0'; /* Ensure nul term. */ 3500 nfsdarg.mdspath = cp; 3501 } else { 3502 nfsdarg.addr = NULL; 3503 nfsdarg.addrlen = 0; 3504 nfsdarg.dnshost = NULL; 3505 nfsdarg.dnshostlen = 0; 3506 nfsdarg.dspath = NULL; 3507 nfsdarg.dspathlen = 0; 3508 nfsdarg.mdspath = NULL; 3509 nfsdarg.mdspathlen = 0; 3510 nfsdarg.mirrorcnt = 1; 3511 } 3512 error = nfsrvd_nfsd(td, &nfsdarg); 3513 free(nfsdarg.addr, M_TEMP); 3514 free(nfsdarg.dnshost, M_TEMP); 3515 free(nfsdarg.dspath, M_TEMP); 3516 free(nfsdarg.mdspath, M_TEMP); 3517 } else if (uap->flag & NFSSVC_PNFSDS) { 3518 error = copyin(uap->argp, &pnfsdarg, sizeof(pnfsdarg)); 3519 if (error == 0 && (pnfsdarg.op == PNFSDOP_DELDSSERVER || 3520 pnfsdarg.op == PNFSDOP_FORCEDELDS)) { 3521 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3522 error = copyinstr(pnfsdarg.dspath, cp, PATH_MAX + 1, 3523 NULL); 3524 if (error == 0) 3525 error = nfsrv_deldsserver(pnfsdarg.op, cp, td); 3526 free(cp, M_TEMP); 3527 } else if (error == 0 && pnfsdarg.op == PNFSDOP_COPYMR) { 3528 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3529 buflen = sizeof(*pf) * NFSDEV_MAXMIRRORS; 3530 buf = malloc(buflen, M_TEMP, M_WAITOK); 3531 error = copyinstr(pnfsdarg.mdspath, cp, PATH_MAX + 1, 3532 NULL); 3533 NFSD_DEBUG(4, "pnfsdcopymr cp mdspath=%d\n", error); 3534 if (error == 0 && pnfsdarg.dspath != NULL) { 3535 cp2 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3536 error = copyinstr(pnfsdarg.dspath, cp2, 3537 PATH_MAX + 1, NULL); 3538 NFSD_DEBUG(4, "pnfsdcopymr cp dspath=%d\n", 3539 error); 3540 } else 3541 cp2 = NULL; 3542 if (error == 0 && pnfsdarg.curdspath != NULL) { 3543 cp3 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3544 error = copyinstr(pnfsdarg.curdspath, cp3, 3545 PATH_MAX + 1, NULL); 3546 NFSD_DEBUG(4, "pnfsdcopymr cp curdspath=%d\n", 3547 error); 3548 } else 3549 cp3 = NULL; 3550 curdvp = NULL; 3551 fds = NULL; 3552 if (error == 0) 3553 error = nfsrv_mdscopymr(cp, cp2, cp3, buf, 3554 &buflen, fname, td, &vp, &nvp, &pf, &ds, 3555 &fds); 3556 NFSD_DEBUG(4, "nfsrv_mdscopymr=%d\n", error); 3557 if (error == 0) { 3558 if (pf->dsf_dir >= nfsrv_dsdirsize) { 3559 printf("copymr: dsdir out of range\n"); 3560 pf->dsf_dir = 0; 3561 } 3562 NFSD_DEBUG(4, "copymr: buflen=%d\n", buflen); 3563 error = nfsrv_copymr(vp, nvp, 3564 ds->nfsdev_dsdir[pf->dsf_dir], ds, pf, 3565 (struct pnfsdsfile *)buf, 3566 buflen / sizeof(*pf), td->td_ucred, td); 3567 vput(vp); 3568 vput(nvp); 3569 if (fds != NULL && error == 0) { 3570 curdvp = fds->nfsdev_dsdir[pf->dsf_dir]; 3571 ret = vn_lock(curdvp, LK_EXCLUSIVE); 3572 if (ret == 0) { 3573 nfsrv_dsremove(curdvp, fname, 3574 td->td_ucred, td); 3575 NFSVOPUNLOCK(curdvp, 0); 3576 } 3577 } 3578 NFSD_DEBUG(4, "nfsrv_copymr=%d\n", error); 3579 } 3580 free(cp, M_TEMP); 3581 free(cp2, M_TEMP); 3582 free(cp3, M_TEMP); 3583 free(buf, M_TEMP); 3584 } 3585 } else { 3586 error = nfssvc_srvcall(td, uap, td->td_ucred); 3587 } 3588 3589 out: 3590 NFSEXITCODE(error); 3591 return (error); 3592 } 3593 3594 static int 3595 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3596 { 3597 struct nfsex_args export; 3598 struct file *fp = NULL; 3599 int stablefd, len; 3600 struct nfsd_clid adminrevoke; 3601 struct nfsd_dumplist dumplist; 3602 struct nfsd_dumpclients *dumpclients; 3603 struct nfsd_dumplocklist dumplocklist; 3604 struct nfsd_dumplocks *dumplocks; 3605 struct nameidata nd; 3606 vnode_t vp; 3607 int error = EINVAL, igotlock; 3608 struct proc *procp; 3609 static int suspend_nfsd = 0; 3610 3611 if (uap->flag & NFSSVC_PUBLICFH) { 3612 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3613 sizeof (fhandle_t)); 3614 error = copyin(uap->argp, 3615 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3616 if (!error) 3617 nfs_pubfhset = 1; 3618 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3619 error = copyin(uap->argp,(caddr_t)&export, 3620 sizeof (struct nfsex_args)); 3621 if (!error) 3622 error = nfsrv_v4rootexport(&export, cred, p); 3623 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3624 nfs_pubfhset = 0; 3625 error = 0; 3626 } else if (uap->flag & NFSSVC_STABLERESTART) { 3627 error = copyin(uap->argp, (caddr_t)&stablefd, 3628 sizeof (int)); 3629 if (!error) 3630 error = fp_getfvp(p, stablefd, &fp, &vp); 3631 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3632 error = EBADF; 3633 if (!error && newnfs_numnfsd != 0) 3634 error = EPERM; 3635 if (!error) { 3636 nfsrv_stablefirst.nsf_fp = fp; 3637 nfsrv_setupstable(p); 3638 } 3639 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3640 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3641 sizeof (struct nfsd_clid)); 3642 if (!error) 3643 error = nfsrv_adminrevoke(&adminrevoke, p); 3644 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3645 error = copyin(uap->argp, (caddr_t)&dumplist, 3646 sizeof (struct nfsd_dumplist)); 3647 if (!error && (dumplist.ndl_size < 1 || 3648 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3649 error = EPERM; 3650 if (!error) { 3651 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3652 dumpclients = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3653 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3654 error = copyout(dumpclients, 3655 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3656 free(dumpclients, M_TEMP); 3657 } 3658 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3659 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3660 sizeof (struct nfsd_dumplocklist)); 3661 if (!error && (dumplocklist.ndllck_size < 1 || 3662 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3663 error = EPERM; 3664 if (!error) 3665 error = nfsrv_lookupfilename(&nd, 3666 dumplocklist.ndllck_fname, p); 3667 if (!error) { 3668 len = sizeof (struct nfsd_dumplocks) * 3669 dumplocklist.ndllck_size; 3670 dumplocks = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3671 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3672 dumplocklist.ndllck_size, p); 3673 vput(nd.ni_vp); 3674 error = copyout(dumplocks, 3675 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3676 free(dumplocks, M_TEMP); 3677 } 3678 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3679 procp = p->td_proc; 3680 PROC_LOCK(procp); 3681 nfsd_master_pid = procp->p_pid; 3682 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3683 nfsd_master_start = procp->p_stats->p_start; 3684 nfsd_master_proc = procp; 3685 PROC_UNLOCK(procp); 3686 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3687 NFSLOCKV4ROOTMUTEX(); 3688 if (suspend_nfsd == 0) { 3689 /* Lock out all nfsd threads */ 3690 do { 3691 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3692 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3693 } while (igotlock == 0 && suspend_nfsd == 0); 3694 suspend_nfsd = 1; 3695 } 3696 NFSUNLOCKV4ROOTMUTEX(); 3697 error = 0; 3698 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3699 NFSLOCKV4ROOTMUTEX(); 3700 if (suspend_nfsd != 0) { 3701 nfsv4_unlock(&nfsd_suspend_lock, 0); 3702 suspend_nfsd = 0; 3703 } 3704 NFSUNLOCKV4ROOTMUTEX(); 3705 error = 0; 3706 } 3707 3708 NFSEXITCODE(error); 3709 return (error); 3710 } 3711 3712 /* 3713 * Check exports. 3714 * Returns 0 if ok, 1 otherwise. 3715 */ 3716 int 3717 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3718 { 3719 int i; 3720 3721 /* 3722 * This seems odd, but allow the case where the security flavor 3723 * list is empty. This happens when NFSv4 is traversing non-exported 3724 * file systems. Exported file systems should always have a non-empty 3725 * security flavor list. 3726 */ 3727 if (exp->nes_numsecflavor == 0) 3728 return (0); 3729 3730 for (i = 0; i < exp->nes_numsecflavor; i++) { 3731 /* 3732 * The tests for privacy and integrity must be first, 3733 * since ND_GSS is set for everything but AUTH_SYS. 3734 */ 3735 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3736 (nd->nd_flag & ND_GSSPRIVACY)) 3737 return (0); 3738 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3739 (nd->nd_flag & ND_GSSINTEGRITY)) 3740 return (0); 3741 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3742 (nd->nd_flag & ND_GSS)) 3743 return (0); 3744 if (exp->nes_secflavors[i] == AUTH_SYS && 3745 (nd->nd_flag & ND_GSS) == 0) 3746 return (0); 3747 } 3748 return (1); 3749 } 3750 3751 /* 3752 * Calculate a hash value for the fid in a file handle. 3753 */ 3754 uint32_t 3755 nfsrv_hashfh(fhandle_t *fhp) 3756 { 3757 uint32_t hashval; 3758 3759 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3760 return (hashval); 3761 } 3762 3763 /* 3764 * Calculate a hash value for the sessionid. 3765 */ 3766 uint32_t 3767 nfsrv_hashsessionid(uint8_t *sessionid) 3768 { 3769 uint32_t hashval; 3770 3771 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3772 return (hashval); 3773 } 3774 3775 /* 3776 * Signal the userland master nfsd to backup the stable restart file. 3777 */ 3778 void 3779 nfsrv_backupstable(void) 3780 { 3781 struct proc *procp; 3782 3783 if (nfsd_master_proc != NULL) { 3784 procp = pfind(nfsd_master_pid); 3785 /* Try to make sure it is the correct process. */ 3786 if (procp == nfsd_master_proc && 3787 procp->p_stats->p_start.tv_sec == 3788 nfsd_master_start.tv_sec && 3789 procp->p_stats->p_start.tv_usec == 3790 nfsd_master_start.tv_usec && 3791 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3792 kern_psignal(procp, SIGUSR2); 3793 else 3794 nfsd_master_proc = NULL; 3795 3796 if (procp != NULL) 3797 PROC_UNLOCK(procp); 3798 } 3799 } 3800 3801 /* 3802 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 3803 * The arguments are in a structure, so that they can be passed through 3804 * taskqueue for a kernel process to execute this function. 3805 */ 3806 struct nfsrvdscreate { 3807 int done; 3808 int inprog; 3809 struct task tsk; 3810 struct ucred *tcred; 3811 struct vnode *dvp; 3812 NFSPROC_T *p; 3813 struct pnfsdsfile *pf; 3814 int err; 3815 fhandle_t fh; 3816 struct vattr va; 3817 struct vattr createva; 3818 }; 3819 3820 int 3821 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 3822 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 3823 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 3824 { 3825 struct vnode *nvp; 3826 struct nameidata named; 3827 struct vattr va; 3828 char *bufp; 3829 u_long *hashp; 3830 struct nfsnode *np; 3831 struct nfsmount *nmp; 3832 int error; 3833 3834 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 3835 LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE); 3836 nfsvno_setpathbuf(&named, &bufp, &hashp); 3837 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 3838 named.ni_cnd.cn_thread = p; 3839 named.ni_cnd.cn_nameptr = bufp; 3840 if (fnamep != NULL) { 3841 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 3842 named.ni_cnd.cn_namelen = strlen(bufp); 3843 } else 3844 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 3845 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 3846 3847 /* Create the date file in the DS mount. */ 3848 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 3849 if (error == 0) { 3850 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 3851 NFSVOPUNLOCK(dvp, 0); 3852 if (error == 0) { 3853 /* Set the ownership of the file. */ 3854 error = VOP_SETATTR(nvp, nvap, tcred); 3855 NFSD_DEBUG(4, "nfsrv_dscreate:" 3856 " setattr-uid=%d\n", error); 3857 if (error != 0) 3858 vput(nvp); 3859 } 3860 if (error != 0) 3861 printf("pNFS: pnfscreate failed=%d\n", error); 3862 } else 3863 printf("pNFS: pnfscreate vnlock=%d\n", error); 3864 if (error == 0) { 3865 np = VTONFS(nvp); 3866 nmp = VFSTONFS(nvp->v_mount); 3867 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 3868 != 0 || nmp->nm_nam->sa_len > sizeof( 3869 struct sockaddr_in6) || 3870 np->n_fhp->nfh_len != NFSX_MYFH) { 3871 printf("Bad DS file: fstype=%s salen=%d" 3872 " fhlen=%d\n", 3873 nvp->v_mount->mnt_vfc->vfc_name, 3874 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 3875 error = ENOENT; 3876 } 3877 3878 /* Set extattrs for the DS on the MDS file. */ 3879 if (error == 0) { 3880 if (dsa != NULL) { 3881 error = VOP_GETATTR(nvp, &va, tcred); 3882 if (error == 0) { 3883 dsa->dsa_filerev = va.va_filerev; 3884 dsa->dsa_size = va.va_size; 3885 dsa->dsa_atime = va.va_atime; 3886 dsa->dsa_mtime = va.va_mtime; 3887 dsa->dsa_bytes = va.va_bytes; 3888 } 3889 } 3890 if (error == 0) { 3891 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 3892 NFSX_MYFH); 3893 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 3894 nmp->nm_nam->sa_len); 3895 NFSBCOPY(named.ni_cnd.cn_nameptr, 3896 pf->dsf_filename, 3897 sizeof(pf->dsf_filename)); 3898 } 3899 } else 3900 printf("pNFS: pnfscreate can't get DS" 3901 " attr=%d\n", error); 3902 if (nvpp != NULL && error == 0) 3903 *nvpp = nvp; 3904 else 3905 vput(nvp); 3906 } 3907 nfsvno_relpathbuf(&named); 3908 return (error); 3909 } 3910 3911 /* 3912 * Start up the thread that will execute nfsrv_dscreate(). 3913 */ 3914 static void 3915 start_dscreate(void *arg, int pending) 3916 { 3917 struct nfsrvdscreate *dsc; 3918 3919 dsc = (struct nfsrvdscreate *)arg; 3920 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 3921 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 3922 dsc->done = 1; 3923 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 3924 } 3925 3926 /* 3927 * Create a pNFS data file on the Data Server(s). 3928 */ 3929 static void 3930 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 3931 NFSPROC_T *p) 3932 { 3933 struct nfsrvdscreate *dsc, *tdsc; 3934 struct nfsdevice *ds, *tds, *fds; 3935 struct mount *mp; 3936 struct pnfsdsfile *pf, *tpf; 3937 struct pnfsdsattr dsattr; 3938 struct vattr va; 3939 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 3940 struct nfsmount *nmp; 3941 fhandle_t fh; 3942 uid_t vauid; 3943 gid_t vagid; 3944 u_short vamode; 3945 struct ucred *tcred; 3946 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 3947 int failpos, timo; 3948 3949 /* Get a DS server directory in a round-robin order. */ 3950 mirrorcnt = 1; 3951 mp = vp->v_mount; 3952 ds = fds = NULL; 3953 NFSDDSLOCK(); 3954 /* 3955 * Search for the first entry that handles this MDS fs, but use the 3956 * first entry for all MDS fs's otherwise. 3957 */ 3958 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 3959 if (tds->nfsdev_nmp != NULL) { 3960 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 3961 ds = tds; 3962 else if (tds->nfsdev_mdsisset != 0 && 3963 mp->mnt_stat.f_fsid.val[0] == 3964 tds->nfsdev_mdsfsid.val[0] && 3965 mp->mnt_stat.f_fsid.val[1] == 3966 tds->nfsdev_mdsfsid.val[1]) { 3967 ds = fds = tds; 3968 break; 3969 } 3970 } 3971 } 3972 if (ds == NULL) { 3973 NFSDDSUNLOCK(); 3974 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 3975 return; 3976 } 3977 i = dsdir[0] = ds->nfsdev_nextdir; 3978 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 3979 dvp[0] = ds->nfsdev_dsdir[i]; 3980 tds = TAILQ_NEXT(ds, nfsdev_list); 3981 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 3982 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 3983 if (tds->nfsdev_nmp != NULL && 3984 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 3985 (tds->nfsdev_mdsisset != 0 && fds != NULL && 3986 mp->mnt_stat.f_fsid.val[0] == 3987 tds->nfsdev_mdsfsid.val[0] && 3988 mp->mnt_stat.f_fsid.val[1] == 3989 tds->nfsdev_mdsfsid.val[1]))) { 3990 dsdir[mirrorcnt] = i; 3991 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 3992 mirrorcnt++; 3993 if (mirrorcnt >= nfsrv_maxpnfsmirror) 3994 break; 3995 } 3996 } 3997 } 3998 /* Put at end of list to implement round-robin usage. */ 3999 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 4000 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 4001 NFSDDSUNLOCK(); 4002 dsc = NULL; 4003 if (mirrorcnt > 1) 4004 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 4005 M_WAITOK | M_ZERO); 4006 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 4007 M_ZERO); 4008 4009 error = nfsvno_getfh(vp, &fh, p); 4010 if (error == 0) 4011 error = VOP_GETATTR(vp, &va, cred); 4012 if (error == 0) { 4013 /* Set the attributes for "vp" to Setattr the DS vp. */ 4014 vauid = va.va_uid; 4015 vagid = va.va_gid; 4016 vamode = va.va_mode; 4017 VATTR_NULL(&va); 4018 va.va_uid = vauid; 4019 va.va_gid = vagid; 4020 va.va_mode = vamode; 4021 va.va_size = 0; 4022 } else 4023 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 4024 4025 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 4026 cred->cr_gid); 4027 /* Make data file name based on FH. */ 4028 tcred = newnfs_getcred(); 4029 4030 /* 4031 * Create the file on each DS mirror, using kernel process(es) for the 4032 * additional mirrors. 4033 */ 4034 failpos = -1; 4035 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 4036 tpf->dsf_dir = dsdir[i]; 4037 tdsc->tcred = tcred; 4038 tdsc->p = p; 4039 tdsc->pf = tpf; 4040 tdsc->createva = *vap; 4041 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 4042 tdsc->va = va; 4043 tdsc->dvp = dvp[i]; 4044 tdsc->done = 0; 4045 tdsc->inprog = 0; 4046 tdsc->err = 0; 4047 ret = EIO; 4048 if (nfs_pnfsiothreads != 0) { 4049 ret = nfs_pnfsio(start_dscreate, tdsc); 4050 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 4051 } 4052 if (ret != 0) { 4053 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 4054 NULL, tcred, p, NULL); 4055 if (ret != 0) { 4056 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 4057 error)); 4058 if (failpos == -1 && nfsds_failerr(ret)) 4059 failpos = i; 4060 else 4061 error = ret; 4062 } 4063 } 4064 } 4065 if (error == 0) { 4066 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4067 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4068 &dsattr, NULL, tcred, p, NULL); 4069 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4070 failpos = mirrorcnt - 1; 4071 error = 0; 4072 } 4073 } 4074 timo = hz / 50; /* Wait for 20msec. */ 4075 if (timo < 1) 4076 timo = 1; 4077 /* Wait for kernel task(s) to complete. */ 4078 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4079 while (tdsc->inprog != 0 && tdsc->done == 0) 4080 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4081 if (tdsc->err != 0) { 4082 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4083 failpos = i; 4084 else if (error == 0) 4085 error = tdsc->err; 4086 } 4087 } 4088 4089 /* 4090 * If failpos has been set, that mirror has failed, so it needs 4091 * to be disabled. 4092 */ 4093 if (failpos >= 0) { 4094 nmp = VFSTONFS(dvp[failpos]->v_mount); 4095 NFSLOCKMNT(nmp); 4096 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4097 NFSMNTP_CANCELRPCS)) == 0) { 4098 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4099 NFSUNLOCKMNT(nmp); 4100 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4101 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4102 ds); 4103 if (ds != NULL) 4104 nfsrv_killrpcs(nmp); 4105 NFSLOCKMNT(nmp); 4106 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4107 wakeup(nmp); 4108 } 4109 NFSUNLOCKMNT(nmp); 4110 } 4111 4112 NFSFREECRED(tcred); 4113 if (error == 0) { 4114 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4115 4116 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4117 mirrorcnt, nfsrv_maxpnfsmirror); 4118 /* 4119 * For all mirrors that couldn't be created, fill in the 4120 * *pf structure, but with an IP address == 0.0.0.0. 4121 */ 4122 tpf = pf + mirrorcnt; 4123 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4124 *tpf = *pf; 4125 tpf->dsf_sin.sin_family = AF_INET; 4126 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4127 tpf->dsf_sin.sin_addr.s_addr = 0; 4128 tpf->dsf_sin.sin_port = 0; 4129 } 4130 4131 error = vn_extattr_set(vp, IO_NODELOCKED, 4132 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4133 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4134 if (error == 0) 4135 error = vn_extattr_set(vp, IO_NODELOCKED, 4136 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4137 sizeof(dsattr), (char *)&dsattr, p); 4138 if (error != 0) 4139 printf("pNFS: pnfscreate setextattr=%d\n", 4140 error); 4141 } else 4142 printf("pNFS: pnfscreate=%d\n", error); 4143 free(pf, M_TEMP); 4144 free(dsc, M_TEMP); 4145 } 4146 4147 /* 4148 * Get the information needed to remove the pNFS Data Server file from the 4149 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4150 * DS directory vnode. The caller must unlock *ddvp when done with it. 4151 */ 4152 static void 4153 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4154 int *mirrorcntp, char *fname, fhandle_t *fhp) 4155 { 4156 struct vattr va; 4157 struct ucred *tcred; 4158 char *buf; 4159 int buflen, error; 4160 4161 dvpp[0] = NULL; 4162 /* If not an exported regular file or not a pNFS server, just return. */ 4163 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4164 nfsrv_devidcnt == 0) 4165 return; 4166 4167 /* Check to see if this is the last hard link. */ 4168 tcred = newnfs_getcred(); 4169 error = VOP_GETATTR(vp, &va, tcred); 4170 NFSFREECRED(tcred); 4171 if (error != 0) { 4172 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4173 return; 4174 } 4175 if (va.va_nlink > 1) 4176 return; 4177 4178 error = nfsvno_getfh(vp, fhp, p); 4179 if (error != 0) { 4180 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4181 return; 4182 } 4183 4184 buflen = 1024; 4185 buf = malloc(buflen, M_TEMP, M_WAITOK); 4186 /* Get the directory vnode for the DS mount and the file handle. */ 4187 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4188 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4189 free(buf, M_TEMP); 4190 if (error != 0) 4191 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4192 } 4193 4194 /* 4195 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4196 * The arguments are in a structure, so that they can be passed through 4197 * taskqueue for a kernel process to execute this function. 4198 */ 4199 struct nfsrvdsremove { 4200 int done; 4201 int inprog; 4202 struct task tsk; 4203 struct ucred *tcred; 4204 struct vnode *dvp; 4205 NFSPROC_T *p; 4206 int err; 4207 char fname[PNFS_FILENAME_LEN + 1]; 4208 }; 4209 4210 static int 4211 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4212 NFSPROC_T *p) 4213 { 4214 struct nameidata named; 4215 struct vnode *nvp; 4216 char *bufp; 4217 u_long *hashp; 4218 int error; 4219 4220 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4221 if (error != 0) 4222 return (error); 4223 named.ni_cnd.cn_nameiop = DELETE; 4224 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4225 named.ni_cnd.cn_cred = tcred; 4226 named.ni_cnd.cn_thread = p; 4227 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 4228 nfsvno_setpathbuf(&named, &bufp, &hashp); 4229 named.ni_cnd.cn_nameptr = bufp; 4230 named.ni_cnd.cn_namelen = strlen(fname); 4231 strlcpy(bufp, fname, NAME_MAX); 4232 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4233 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4234 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4235 if (error == 0) { 4236 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4237 vput(nvp); 4238 } 4239 NFSVOPUNLOCK(dvp, 0); 4240 nfsvno_relpathbuf(&named); 4241 if (error != 0) 4242 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4243 return (error); 4244 } 4245 4246 /* 4247 * Start up the thread that will execute nfsrv_dsremove(). 4248 */ 4249 static void 4250 start_dsremove(void *arg, int pending) 4251 { 4252 struct nfsrvdsremove *dsrm; 4253 4254 dsrm = (struct nfsrvdsremove *)arg; 4255 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4256 dsrm->p); 4257 dsrm->done = 1; 4258 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4259 } 4260 4261 /* 4262 * Remove a pNFS data file from a Data Server. 4263 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4264 * removed to set up the dvp and fill in the FH. 4265 */ 4266 static void 4267 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4268 NFSPROC_T *p) 4269 { 4270 struct ucred *tcred; 4271 struct nfsrvdsremove *dsrm, *tdsrm; 4272 struct nfsdevice *ds; 4273 struct nfsmount *nmp; 4274 int failpos, i, ret, timo; 4275 4276 tcred = newnfs_getcred(); 4277 dsrm = NULL; 4278 if (mirrorcnt > 1) 4279 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4280 /* 4281 * Remove the file on each DS mirror, using kernel process(es) for the 4282 * additional mirrors. 4283 */ 4284 failpos = -1; 4285 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4286 tdsrm->tcred = tcred; 4287 tdsrm->p = p; 4288 tdsrm->dvp = dvp[i]; 4289 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4290 tdsrm->inprog = 0; 4291 tdsrm->done = 0; 4292 tdsrm->err = 0; 4293 ret = EIO; 4294 if (nfs_pnfsiothreads != 0) { 4295 ret = nfs_pnfsio(start_dsremove, tdsrm); 4296 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4297 } 4298 if (ret != 0) { 4299 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4300 if (failpos == -1 && nfsds_failerr(ret)) 4301 failpos = i; 4302 } 4303 } 4304 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4305 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4306 failpos = mirrorcnt - 1; 4307 timo = hz / 50; /* Wait for 20msec. */ 4308 if (timo < 1) 4309 timo = 1; 4310 /* Wait for kernel task(s) to complete. */ 4311 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4312 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4313 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4314 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4315 failpos = i; 4316 } 4317 4318 /* 4319 * If failpos has been set, that mirror has failed, so it needs 4320 * to be disabled. 4321 */ 4322 if (failpos >= 0) { 4323 nmp = VFSTONFS(dvp[failpos]->v_mount); 4324 NFSLOCKMNT(nmp); 4325 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4326 NFSMNTP_CANCELRPCS)) == 0) { 4327 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4328 NFSUNLOCKMNT(nmp); 4329 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4330 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4331 ds); 4332 if (ds != NULL) 4333 nfsrv_killrpcs(nmp); 4334 NFSLOCKMNT(nmp); 4335 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4336 wakeup(nmp); 4337 } 4338 NFSUNLOCKMNT(nmp); 4339 } 4340 4341 /* Get rid all layouts for the file. */ 4342 nfsrv_freefilelayouts(fhp); 4343 4344 NFSFREECRED(tcred); 4345 free(dsrm, M_TEMP); 4346 } 4347 4348 /* 4349 * Generate a file name based on the file handle and put it in *bufp. 4350 * Return the number of bytes generated. 4351 */ 4352 static int 4353 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4354 { 4355 int i; 4356 uint8_t *cp; 4357 const uint8_t *hexdigits = "0123456789abcdef"; 4358 4359 cp = (uint8_t *)fhp; 4360 for (i = 0; i < sizeof(*fhp); i++) { 4361 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4362 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4363 } 4364 bufp[2 * i] = '\0'; 4365 return (2 * i); 4366 } 4367 4368 /* 4369 * Update the Metadata file's attributes from the DS file when a Read/Write 4370 * layout is returned. 4371 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4372 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4373 */ 4374 int 4375 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4376 { 4377 struct ucred *tcred; 4378 int error; 4379 4380 /* Do this as root so that it won't fail with EACCES. */ 4381 tcred = newnfs_getcred(); 4382 error = nfsrv_proxyds(vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4383 NULL, NULL, NULL, nap, NULL); 4384 NFSFREECRED(tcred); 4385 return (error); 4386 } 4387 4388 /* 4389 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4390 */ 4391 static int 4392 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4393 NFSPROC_T *p) 4394 { 4395 int error; 4396 4397 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETACL, 4398 NULL, NULL, NULL, NULL, aclp); 4399 return (error); 4400 } 4401 4402 static int 4403 nfsrv_proxyds(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 4404 struct thread *p, int ioproc, struct mbuf **mpp, char *cp, 4405 struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp) 4406 { 4407 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4408 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4409 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4410 struct nfsdevice *ds; 4411 struct pnfsdsattr dsattr; 4412 struct opnfsdsattr odsattr; 4413 char *buf; 4414 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4415 4416 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4417 /* 4418 * If not a regular file, not exported or not a pNFS server, 4419 * just return ENOENT. 4420 */ 4421 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4422 nfsrv_devidcnt == 0) 4423 return (ENOENT); 4424 4425 buflen = 1024; 4426 buf = malloc(buflen, M_TEMP, M_WAITOK); 4427 error = 0; 4428 4429 /* 4430 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4431 * from the MetaData file's extended attribute. 4432 */ 4433 if (ioproc == NFSPROC_GETATTR) { 4434 error = vn_extattr_get(vp, IO_NODELOCKED, 4435 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4436 p); 4437 if (error == 0) { 4438 if (buflen == sizeof(odsattr)) { 4439 NFSBCOPY(buf, &odsattr, buflen); 4440 nap->na_filerev = odsattr.dsa_filerev; 4441 nap->na_size = odsattr.dsa_size; 4442 nap->na_atime = odsattr.dsa_atime; 4443 nap->na_mtime = odsattr.dsa_mtime; 4444 /* 4445 * Fake na_bytes by rounding up na_size. 4446 * Since we don't know the block size, just 4447 * use BLKDEV_IOSIZE. 4448 */ 4449 nap->na_bytes = (odsattr.dsa_size + 4450 BLKDEV_IOSIZE - 1) & ~(BLKDEV_IOSIZE - 1); 4451 } else if (buflen == sizeof(dsattr)) { 4452 NFSBCOPY(buf, &dsattr, buflen); 4453 nap->na_filerev = dsattr.dsa_filerev; 4454 nap->na_size = dsattr.dsa_size; 4455 nap->na_atime = dsattr.dsa_atime; 4456 nap->na_mtime = dsattr.dsa_mtime; 4457 nap->na_bytes = dsattr.dsa_bytes; 4458 } else 4459 error = ENXIO; 4460 } 4461 if (error == 0) { 4462 /* 4463 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4464 * returns 0, just return now. nfsrv_checkdsattr() 4465 * returns 0 if there is no Read/Write layout 4466 * plus either an Open/Write_access or Write 4467 * delegation issued to a client for the file. 4468 */ 4469 if (nfsrv_pnfsgetdsattr == 0 || 4470 nfsrv_checkdsattr(vp, p) == 0) { 4471 free(buf, M_TEMP); 4472 return (error); 4473 } 4474 } 4475 4476 /* 4477 * Clear ENOATTR so the code below will attempt to do a 4478 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4479 * the extended attribute. 4480 */ 4481 if (error == ENOATTR) 4482 error = 0; 4483 } 4484 4485 origmircnt = -1; 4486 trycnt = 0; 4487 tryagain: 4488 if (error == 0) { 4489 buflen = 1024; 4490 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4491 LK_EXCLUSIVE) 4492 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4493 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4494 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4495 NULL, NULL); 4496 if (error == 0) { 4497 for (i = 0; i < mirrorcnt; i++) 4498 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4499 } else 4500 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4501 } else 4502 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4503 if (error == 0) { 4504 failpos = -1; 4505 if (origmircnt == -1) 4506 origmircnt = mirrorcnt; 4507 /* 4508 * If failpos is set to a mirror#, then that mirror has 4509 * failed and will be disabled. For Read and Getattr, the 4510 * function only tries one mirror, so if that mirror has 4511 * failed, it will need to be retried. As such, increment 4512 * tryitagain for these cases. 4513 * For Write, Setattr and Setacl, the function tries all 4514 * mirrors and will not return an error for the case where 4515 * one mirror has failed. For these cases, the functioning 4516 * mirror(s) will have been modified, so a retry isn't 4517 * necessary. These functions will set failpos for the 4518 * failed mirror#. 4519 */ 4520 if (ioproc == NFSPROC_READDS) { 4521 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4522 mpp, mpp2); 4523 if (nfsds_failerr(error) && mirrorcnt > 1) { 4524 /* 4525 * Setting failpos will cause the mirror 4526 * to be disabled and then a retry of this 4527 * read is required. 4528 */ 4529 failpos = 0; 4530 error = 0; 4531 trycnt++; 4532 } 4533 } else if (ioproc == NFSPROC_WRITEDS) 4534 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4535 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4536 else if (ioproc == NFSPROC_SETATTR) 4537 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4538 mirrorcnt, nap, &failpos); 4539 else if (ioproc == NFSPROC_SETACL) 4540 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4541 mirrorcnt, aclp, &failpos); 4542 else { 4543 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4544 vp, nmp[mirrorcnt - 1], nap); 4545 if (nfsds_failerr(error) && mirrorcnt > 1) { 4546 /* 4547 * Setting failpos will cause the mirror 4548 * to be disabled and then a retry of this 4549 * getattr is required. 4550 */ 4551 failpos = mirrorcnt - 1; 4552 error = 0; 4553 trycnt++; 4554 } 4555 } 4556 ds = NULL; 4557 if (failpos >= 0) { 4558 failnmp = nmp[failpos]; 4559 NFSLOCKMNT(failnmp); 4560 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4561 NFSMNTP_CANCELRPCS)) == 0) { 4562 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4563 NFSUNLOCKMNT(failnmp); 4564 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4565 failnmp, p); 4566 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4567 failpos, ds); 4568 if (ds != NULL) 4569 nfsrv_killrpcs(failnmp); 4570 NFSLOCKMNT(failnmp); 4571 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4572 wakeup(failnmp); 4573 } 4574 NFSUNLOCKMNT(failnmp); 4575 } 4576 for (i = 0; i < mirrorcnt; i++) 4577 NFSVOPUNLOCK(dvp[i], 0); 4578 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4579 trycnt); 4580 /* Try the Read/Getattr again if a mirror was deleted. */ 4581 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4582 goto tryagain; 4583 } else { 4584 /* Return ENOENT for any Extended Attribute error. */ 4585 error = ENOENT; 4586 } 4587 free(buf, M_TEMP); 4588 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4589 return (error); 4590 } 4591 4592 /* 4593 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4594 * attribute. 4595 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4596 * to be checked. If it points to a NULL nmp, then it returns 4597 * a suitable destination. 4598 * curnmp - If non-NULL, it is the source mount for the copy. 4599 */ 4600 int 4601 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4602 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4603 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4604 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4605 { 4606 struct vnode *dvp, *nvp, **tdvpp; 4607 struct mount *mp; 4608 struct nfsmount *nmp, *newnmp; 4609 struct sockaddr *sad; 4610 struct sockaddr_in *sin; 4611 struct nfsdevice *ds, *tds, *fndds; 4612 struct pnfsdsfile *pf; 4613 uint32_t dsdir; 4614 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4615 4616 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4617 *mirrorcntp = 1; 4618 tdvpp = dvpp; 4619 if (nvpp != NULL) 4620 *nvpp = NULL; 4621 if (dvpp != NULL) 4622 *dvpp = NULL; 4623 if (ippos != NULL) 4624 *ippos = -1; 4625 if (newnmpp != NULL) 4626 newnmp = *newnmpp; 4627 else 4628 newnmp = NULL; 4629 mp = vp->v_mount; 4630 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4631 "pnfsd.dsfile", buflenp, buf, p); 4632 mirrorcnt = *buflenp / sizeof(*pf); 4633 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4634 *buflenp != sizeof(*pf) * mirrorcnt)) 4635 error = ENOATTR; 4636 4637 pf = (struct pnfsdsfile *)buf; 4638 /* If curnmp != NULL, check for a match in the mirror list. */ 4639 if (curnmp != NULL && error == 0) { 4640 fnd = 0; 4641 for (i = 0; i < mirrorcnt; i++, pf++) { 4642 sad = (struct sockaddr *)&pf->dsf_sin; 4643 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 4644 if (ippos != NULL) 4645 *ippos = i; 4646 fnd = 1; 4647 break; 4648 } 4649 } 4650 if (fnd == 0) 4651 error = ENXIO; 4652 } 4653 4654 gotone = 0; 4655 pf = (struct pnfsdsfile *)buf; 4656 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 4657 error); 4658 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 4659 fhiszero = 0; 4660 sad = (struct sockaddr *)&pf->dsf_sin; 4661 sin = &pf->dsf_sin; 4662 dsdir = pf->dsf_dir; 4663 if (dsdir >= nfsrv_dsdirsize) { 4664 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 4665 error = ENOATTR; 4666 } else if (nvpp != NULL && newnmp != NULL && 4667 nfsaddr2_match(sad, newnmp->nm_nam)) 4668 error = EEXIST; 4669 if (error == 0) { 4670 if (ippos != NULL && curnmp == NULL && 4671 sad->sa_family == AF_INET && 4672 sin->sin_addr.s_addr == 0) 4673 *ippos = i; 4674 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 4675 fhiszero = 1; 4676 /* Use the socket address to find the mount point. */ 4677 fndds = NULL; 4678 NFSDDSLOCK(); 4679 /* Find a match for the IP address. */ 4680 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 4681 if (ds->nfsdev_nmp != NULL) { 4682 dvp = ds->nfsdev_dvp; 4683 nmp = VFSTONFS(dvp->v_mount); 4684 if (nmp != ds->nfsdev_nmp) 4685 printf("different2 nmp %p %p\n", 4686 nmp, ds->nfsdev_nmp); 4687 if (nfsaddr2_match(sad, nmp->nm_nam)) { 4688 fndds = ds; 4689 break; 4690 } 4691 } 4692 } 4693 if (fndds != NULL && newnmpp != NULL && 4694 newnmp == NULL) { 4695 /* Search for a place to make a mirror copy. */ 4696 TAILQ_FOREACH(tds, &nfsrv_devidhead, 4697 nfsdev_list) { 4698 if (tds->nfsdev_nmp != NULL && 4699 fndds != tds && 4700 ((tds->nfsdev_mdsisset == 0 && 4701 fndds->nfsdev_mdsisset == 0) || 4702 (tds->nfsdev_mdsisset != 0 && 4703 fndds->nfsdev_mdsisset != 0 && 4704 tds->nfsdev_mdsfsid.val[0] == 4705 mp->mnt_stat.f_fsid.val[0] && 4706 tds->nfsdev_mdsfsid.val[1] == 4707 mp->mnt_stat.f_fsid.val[1]))) { 4708 *newnmpp = tds->nfsdev_nmp; 4709 break; 4710 } 4711 } 4712 if (tds != NULL) { 4713 /* 4714 * Move this entry to the end of the 4715 * list, so it won't be selected as 4716 * easily the next time. 4717 */ 4718 TAILQ_REMOVE(&nfsrv_devidhead, tds, 4719 nfsdev_list); 4720 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 4721 nfsdev_list); 4722 } 4723 } 4724 NFSDDSUNLOCK(); 4725 if (fndds != NULL) { 4726 dvp = fndds->nfsdev_dsdir[dsdir]; 4727 if (lktype != 0 || fhiszero != 0 || 4728 (nvpp != NULL && *nvpp == NULL)) { 4729 if (fhiszero != 0) 4730 error = vn_lock(dvp, 4731 LK_EXCLUSIVE); 4732 else if (lktype != 0) 4733 error = vn_lock(dvp, lktype); 4734 else 4735 error = vn_lock(dvp, LK_SHARED); 4736 /* 4737 * If the file handle is all 0's, try to 4738 * do a Lookup against the DS to acquire 4739 * it. 4740 * If dvpp == NULL or the Lookup fails, 4741 * unlock dvp after the call. 4742 */ 4743 if (error == 0 && (fhiszero != 0 || 4744 (nvpp != NULL && *nvpp == NULL))) { 4745 error = nfsrv_pnfslookupds(vp, 4746 dvp, pf, &nvp, p); 4747 if (error == 0) { 4748 if (fhiszero != 0) 4749 nfsrv_pnfssetfh( 4750 vp, pf, 4751 devid, 4752 fnamep, 4753 nvp, p); 4754 if (nvpp != NULL && 4755 *nvpp == NULL) { 4756 *nvpp = nvp; 4757 *dsdirp = dsdir; 4758 } else 4759 vput(nvp); 4760 } 4761 if (error != 0 || lktype == 0) 4762 NFSVOPUNLOCK(dvp, 0); 4763 } 4764 } 4765 if (error == 0) { 4766 gotone++; 4767 NFSD_DEBUG(4, "gotone=%d\n", gotone); 4768 if (devid != NULL) { 4769 NFSBCOPY(fndds->nfsdev_deviceid, 4770 devid, NFSX_V4DEVICEID); 4771 devid += NFSX_V4DEVICEID; 4772 } 4773 if (dvpp != NULL) 4774 *tdvpp++ = dvp; 4775 if (fhp != NULL) 4776 NFSBCOPY(&pf->dsf_fh, fhp++, 4777 NFSX_MYFH); 4778 if (fnamep != NULL && gotone == 1) 4779 strlcpy(fnamep, 4780 pf->dsf_filename, 4781 sizeof(pf->dsf_filename)); 4782 } else 4783 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 4784 "err=%d\n", error); 4785 } 4786 } 4787 } 4788 if (error == 0 && gotone == 0) 4789 error = ENOENT; 4790 4791 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 4792 error); 4793 if (error == 0) 4794 *mirrorcntp = gotone; 4795 else { 4796 if (gotone > 0 && dvpp != NULL) { 4797 /* 4798 * If the error didn't occur on the first one and 4799 * dvpp != NULL, the one(s) prior to the failure will 4800 * have locked dvp's that need to be unlocked. 4801 */ 4802 for (i = 0; i < gotone; i++) { 4803 NFSVOPUNLOCK(*dvpp, 0); 4804 *dvpp++ = NULL; 4805 } 4806 } 4807 /* 4808 * If it found the vnode to be copied from before a failure, 4809 * it needs to be vput()'d. 4810 */ 4811 if (nvpp != NULL && *nvpp != NULL) { 4812 vput(*nvpp); 4813 *nvpp = NULL; 4814 } 4815 } 4816 return (error); 4817 } 4818 4819 /* 4820 * Set the extended attribute for the Change attribute. 4821 */ 4822 static int 4823 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4824 { 4825 struct pnfsdsattr dsattr; 4826 int error; 4827 4828 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 4829 dsattr.dsa_filerev = nap->na_filerev; 4830 dsattr.dsa_size = nap->na_size; 4831 dsattr.dsa_atime = nap->na_atime; 4832 dsattr.dsa_mtime = nap->na_mtime; 4833 dsattr.dsa_bytes = nap->na_bytes; 4834 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4835 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 4836 if (error != 0) 4837 printf("pNFS: setextattr=%d\n", error); 4838 return (error); 4839 } 4840 4841 static int 4842 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 4843 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 4844 { 4845 uint32_t *tl; 4846 struct nfsrv_descript *nd; 4847 nfsv4stateid_t st; 4848 struct mbuf *m, *m2; 4849 int error = 0, retlen, tlen, trimlen; 4850 4851 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 4852 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4853 *mpp = NULL; 4854 /* 4855 * Use a stateid where other is an alternating 01010 pattern and 4856 * seqid is 0xffffffff. This value is not defined as special by 4857 * the RFC and is used by the FreeBSD NFS server to indicate an 4858 * MDS->DS proxy operation. 4859 */ 4860 st.other[0] = 0x55555555; 4861 st.other[1] = 0x55555555; 4862 st.other[2] = 0x55555555; 4863 st.seqid = 0xffffffff; 4864 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 4865 NULL, NULL, 0, 0); 4866 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4867 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 4868 txdr_hyper(off, tl); 4869 *(tl + 2) = txdr_unsigned(len); 4870 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 4871 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 4872 if (error != 0) { 4873 free(nd, M_TEMP); 4874 return (error); 4875 } 4876 if (nd->nd_repstat == 0) { 4877 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4878 NFSM_STRSIZ(retlen, len); 4879 if (retlen > 0) { 4880 /* Trim off the pre-data XDR from the mbuf chain. */ 4881 m = nd->nd_mrep; 4882 while (m != NULL && m != nd->nd_md) { 4883 if (m->m_next == nd->nd_md) { 4884 m->m_next = NULL; 4885 m_freem(nd->nd_mrep); 4886 nd->nd_mrep = m = nd->nd_md; 4887 } else 4888 m = m->m_next; 4889 } 4890 if (m == NULL) { 4891 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4892 error = ENOENT; 4893 goto nfsmout; 4894 } 4895 4896 /* 4897 * Now, adjust first mbuf so that any XDR before the 4898 * read data is skipped over. 4899 */ 4900 trimlen = nd->nd_dpos - mtod(m, char *); 4901 if (trimlen > 0) { 4902 m->m_len -= trimlen; 4903 NFSM_DATAP(m, trimlen); 4904 } 4905 4906 /* 4907 * Truncate the mbuf chain at retlen bytes of data, 4908 * plus XDR padding that brings the length up to a 4909 * multiple of 4. 4910 */ 4911 tlen = NFSM_RNDUP(retlen); 4912 do { 4913 if (m->m_len >= tlen) { 4914 m->m_len = tlen; 4915 tlen = 0; 4916 m2 = m->m_next; 4917 m->m_next = NULL; 4918 m_freem(m2); 4919 break; 4920 } 4921 tlen -= m->m_len; 4922 m = m->m_next; 4923 } while (m != NULL); 4924 if (tlen > 0) { 4925 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4926 error = ENOENT; 4927 goto nfsmout; 4928 } 4929 *mpp = nd->nd_mrep; 4930 *mpendp = m; 4931 nd->nd_mrep = NULL; 4932 } 4933 } else 4934 error = nd->nd_repstat; 4935 nfsmout: 4936 /* If nd->nd_mrep is already NULL, this is a no-op. */ 4937 m_freem(nd->nd_mrep); 4938 free(nd, M_TEMP); 4939 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 4940 return (error); 4941 } 4942 4943 /* 4944 * Do a write RPC on a DS data file, using this structure for the arguments, 4945 * so that this function can be executed by a separate kernel process. 4946 */ 4947 struct nfsrvwritedsdorpc { 4948 int done; 4949 int inprog; 4950 struct task tsk; 4951 fhandle_t fh; 4952 off_t off; 4953 int len; 4954 struct nfsmount *nmp; 4955 struct ucred *cred; 4956 NFSPROC_T *p; 4957 struct mbuf *m; 4958 int err; 4959 }; 4960 4961 static int 4962 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 4963 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 4964 { 4965 uint32_t *tl; 4966 struct nfsrv_descript *nd; 4967 nfsattrbit_t attrbits; 4968 nfsv4stateid_t st; 4969 int commit, error, retlen; 4970 4971 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4972 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 4973 sizeof(fhandle_t), NULL, NULL, 0, 0); 4974 4975 /* 4976 * Use a stateid where other is an alternating 01010 pattern and 4977 * seqid is 0xffffffff. This value is not defined as special by 4978 * the RFC and is used by the FreeBSD NFS server to indicate an 4979 * MDS->DS proxy operation. 4980 */ 4981 st.other[0] = 0x55555555; 4982 st.other[1] = 0x55555555; 4983 st.other[2] = 0x55555555; 4984 st.seqid = 0xffffffff; 4985 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4986 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 4987 txdr_hyper(off, tl); 4988 tl += 2; 4989 /* 4990 * Do all writes FileSync, since the server doesn't hold onto dirty 4991 * buffers. Since clients should be accessing the DS servers directly 4992 * using the pNFS layouts, this just needs to work correctly as a 4993 * fallback. 4994 */ 4995 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 4996 *tl = txdr_unsigned(len); 4997 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 4998 4999 /* Put data in mbuf chain. */ 5000 nd->nd_mb->m_next = m; 5001 5002 /* Set nd_mb and nd_bpos to end of data. */ 5003 while (m->m_next != NULL) 5004 m = m->m_next; 5005 nd->nd_mb = m; 5006 nd->nd_bpos = mtod(m, char *) + m->m_len; 5007 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 5008 5009 /* Do a Getattr for the attributes that change upon writing. */ 5010 NFSZERO_ATTRBIT(&attrbits); 5011 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5012 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5013 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5014 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5015 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5016 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5017 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5018 (void) nfsrv_putattrbit(nd, &attrbits); 5019 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5020 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5021 if (error != 0) { 5022 free(nd, M_TEMP); 5023 return (error); 5024 } 5025 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 5026 /* Get rid of weak cache consistency data for now. */ 5027 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5028 (ND_NFSV4 | ND_V4WCCATTR)) { 5029 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5030 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5031 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 5032 if (error != 0) 5033 goto nfsmout; 5034 /* 5035 * Get rid of Op# and status for next op. 5036 */ 5037 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5038 if (*++tl != 0) 5039 nd->nd_flag |= ND_NOMOREDATA; 5040 } 5041 if (nd->nd_repstat == 0) { 5042 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 5043 retlen = fxdr_unsigned(int, *tl++); 5044 commit = fxdr_unsigned(int, *tl); 5045 if (commit != NFSWRITE_FILESYNC) 5046 error = NFSERR_IO; 5047 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 5048 retlen, commit, error); 5049 } else 5050 error = nd->nd_repstat; 5051 /* We have no use for the Write Verifier since we use FileSync. */ 5052 5053 /* 5054 * Get the Change, Size, Access Time and Modify Time attributes and set 5055 * on the Metadata file, so its attributes will be what the file's 5056 * would be if it had been written. 5057 */ 5058 if (error == 0) { 5059 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5060 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5061 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5062 } 5063 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 5064 nfsmout: 5065 m_freem(nd->nd_mrep); 5066 free(nd, M_TEMP); 5067 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 5068 return (error); 5069 } 5070 5071 /* 5072 * Start up the thread that will execute nfsrv_writedsdorpc(). 5073 */ 5074 static void 5075 start_writedsdorpc(void *arg, int pending) 5076 { 5077 struct nfsrvwritedsdorpc *drpc; 5078 5079 drpc = (struct nfsrvwritedsdorpc *)arg; 5080 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5081 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5082 drpc->done = 1; 5083 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5084 } 5085 5086 static int 5087 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5088 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5089 struct mbuf **mpp, char *cp, int *failposp) 5090 { 5091 struct nfsrvwritedsdorpc *drpc, *tdrpc; 5092 struct nfsvattr na; 5093 struct mbuf *m; 5094 int error, i, offs, ret, timo; 5095 5096 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5097 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5098 drpc = NULL; 5099 if (mirrorcnt > 1) 5100 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5101 M_WAITOK); 5102 5103 /* Calculate offset in mbuf chain that data starts. */ 5104 offs = cp - mtod(*mpp, char *); 5105 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5106 5107 /* 5108 * Do the write RPC for every DS, using a separate kernel process 5109 * for every DS except the last one. 5110 */ 5111 error = 0; 5112 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5113 tdrpc->done = 0; 5114 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5115 tdrpc->off = off; 5116 tdrpc->len = len; 5117 tdrpc->nmp = *nmpp; 5118 tdrpc->cred = cred; 5119 tdrpc->p = p; 5120 tdrpc->inprog = 0; 5121 tdrpc->err = 0; 5122 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5123 ret = EIO; 5124 if (nfs_pnfsiothreads != 0) { 5125 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5126 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5127 ret); 5128 } 5129 if (ret != 0) { 5130 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5131 tdrpc->m, cred, p); 5132 if (nfsds_failerr(ret) && *failposp == -1) 5133 *failposp = i; 5134 else if (error == 0 && ret != 0) 5135 error = ret; 5136 } 5137 nmpp++; 5138 fhp++; 5139 } 5140 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5141 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5142 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5143 *failposp = mirrorcnt - 1; 5144 else if (error == 0 && ret != 0) 5145 error = ret; 5146 if (error == 0) 5147 error = nfsrv_setextattr(vp, &na, p); 5148 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5149 tdrpc = drpc; 5150 timo = hz / 50; /* Wait for 20msec. */ 5151 if (timo < 1) 5152 timo = 1; 5153 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5154 /* Wait for RPCs on separate threads to complete. */ 5155 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5156 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5157 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5158 *failposp = i; 5159 else if (error == 0 && tdrpc->err != 0) 5160 error = tdrpc->err; 5161 } 5162 free(drpc, M_TEMP); 5163 return (error); 5164 } 5165 5166 static int 5167 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5168 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5169 struct nfsvattr *dsnap) 5170 { 5171 uint32_t *tl; 5172 struct nfsrv_descript *nd; 5173 nfsv4stateid_t st; 5174 nfsattrbit_t attrbits; 5175 int error; 5176 5177 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5178 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5179 /* 5180 * Use a stateid where other is an alternating 01010 pattern and 5181 * seqid is 0xffffffff. This value is not defined as special by 5182 * the RFC and is used by the FreeBSD NFS server to indicate an 5183 * MDS->DS proxy operation. 5184 */ 5185 st.other[0] = 0x55555555; 5186 st.other[1] = 0x55555555; 5187 st.other[2] = 0x55555555; 5188 st.seqid = 0xffffffff; 5189 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5190 NULL, NULL, 0, 0); 5191 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5192 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5193 5194 /* Do a Getattr for the attributes that change due to writing. */ 5195 NFSZERO_ATTRBIT(&attrbits); 5196 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5197 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5198 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5199 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5200 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5201 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5202 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5203 (void) nfsrv_putattrbit(nd, &attrbits); 5204 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5205 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5206 if (error != 0) { 5207 free(nd, M_TEMP); 5208 return (error); 5209 } 5210 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5211 nd->nd_repstat); 5212 /* Get rid of weak cache consistency data for now. */ 5213 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5214 (ND_NFSV4 | ND_V4WCCATTR)) { 5215 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5216 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5217 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5218 if (error != 0) 5219 goto nfsmout; 5220 /* 5221 * Get rid of Op# and status for next op. 5222 */ 5223 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5224 if (*++tl != 0) 5225 nd->nd_flag |= ND_NOMOREDATA; 5226 } 5227 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5228 if (error != 0) 5229 goto nfsmout; 5230 if (nd->nd_repstat != 0) 5231 error = nd->nd_repstat; 5232 /* 5233 * Get the Change, Size, Access Time and Modify Time attributes and set 5234 * on the Metadata file, so its attributes will be what the file's 5235 * would be if it had been written. 5236 */ 5237 if (error == 0) { 5238 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5239 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5240 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5241 } 5242 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5243 nfsmout: 5244 m_freem(nd->nd_mrep); 5245 free(nd, M_TEMP); 5246 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5247 return (error); 5248 } 5249 5250 struct nfsrvsetattrdsdorpc { 5251 int done; 5252 int inprog; 5253 struct task tsk; 5254 fhandle_t fh; 5255 struct nfsmount *nmp; 5256 struct vnode *vp; 5257 struct ucred *cred; 5258 NFSPROC_T *p; 5259 struct nfsvattr na; 5260 struct nfsvattr dsna; 5261 int err; 5262 }; 5263 5264 /* 5265 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5266 */ 5267 static void 5268 start_setattrdsdorpc(void *arg, int pending) 5269 { 5270 struct nfsrvsetattrdsdorpc *drpc; 5271 5272 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5273 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5274 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5275 drpc->done = 1; 5276 } 5277 5278 static int 5279 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5280 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5281 struct nfsvattr *nap, int *failposp) 5282 { 5283 struct nfsrvsetattrdsdorpc *drpc, *tdrpc; 5284 struct nfsvattr na; 5285 int error, i, ret, timo; 5286 5287 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5288 drpc = NULL; 5289 if (mirrorcnt > 1) 5290 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5291 M_WAITOK); 5292 5293 /* 5294 * Do the setattr RPC for every DS, using a separate kernel process 5295 * for every DS except the last one. 5296 */ 5297 error = 0; 5298 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5299 tdrpc->done = 0; 5300 tdrpc->inprog = 0; 5301 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5302 tdrpc->nmp = *nmpp; 5303 tdrpc->vp = vp; 5304 tdrpc->cred = cred; 5305 tdrpc->p = p; 5306 tdrpc->na = *nap; 5307 tdrpc->err = 0; 5308 ret = EIO; 5309 if (nfs_pnfsiothreads != 0) { 5310 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 5311 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 5312 ret); 5313 } 5314 if (ret != 0) { 5315 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 5316 &na); 5317 if (nfsds_failerr(ret) && *failposp == -1) 5318 *failposp = i; 5319 else if (error == 0 && ret != 0) 5320 error = ret; 5321 } 5322 nmpp++; 5323 fhp++; 5324 } 5325 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 5326 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5327 *failposp = mirrorcnt - 1; 5328 else if (error == 0 && ret != 0) 5329 error = ret; 5330 if (error == 0) 5331 error = nfsrv_setextattr(vp, &na, p); 5332 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 5333 tdrpc = drpc; 5334 timo = hz / 50; /* Wait for 20msec. */ 5335 if (timo < 1) 5336 timo = 1; 5337 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5338 /* Wait for RPCs on separate threads to complete. */ 5339 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5340 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 5341 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5342 *failposp = i; 5343 else if (error == 0 && tdrpc->err != 0) 5344 error = tdrpc->err; 5345 } 5346 free(drpc, M_TEMP); 5347 return (error); 5348 } 5349 5350 /* 5351 * Do a Setattr of an NFSv4 ACL on the DS file. 5352 */ 5353 static int 5354 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5355 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 5356 { 5357 struct nfsrv_descript *nd; 5358 nfsv4stateid_t st; 5359 nfsattrbit_t attrbits; 5360 int error; 5361 5362 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 5363 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5364 /* 5365 * Use a stateid where other is an alternating 01010 pattern and 5366 * seqid is 0xffffffff. This value is not defined as special by 5367 * the RFC and is used by the FreeBSD NFS server to indicate an 5368 * MDS->DS proxy operation. 5369 */ 5370 st.other[0] = 0x55555555; 5371 st.other[1] = 0x55555555; 5372 st.other[2] = 0x55555555; 5373 st.seqid = 0xffffffff; 5374 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5375 NULL, NULL, 0, 0); 5376 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5377 NFSZERO_ATTRBIT(&attrbits); 5378 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 5379 /* 5380 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 5381 * so passing in the metadata "vp" will be ok, since it is of 5382 * the same type (VREG). 5383 */ 5384 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 5385 NULL, 0, 0, 0, 0, 0, NULL); 5386 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5387 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5388 if (error != 0) { 5389 free(nd, M_TEMP); 5390 return (error); 5391 } 5392 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 5393 nd->nd_repstat); 5394 error = nd->nd_repstat; 5395 m_freem(nd->nd_mrep); 5396 free(nd, M_TEMP); 5397 return (error); 5398 } 5399 5400 struct nfsrvsetacldsdorpc { 5401 int done; 5402 int inprog; 5403 struct task tsk; 5404 fhandle_t fh; 5405 struct nfsmount *nmp; 5406 struct vnode *vp; 5407 struct ucred *cred; 5408 NFSPROC_T *p; 5409 struct acl *aclp; 5410 int err; 5411 }; 5412 5413 /* 5414 * Start up the thread that will execute nfsrv_setacldsdorpc(). 5415 */ 5416 static void 5417 start_setacldsdorpc(void *arg, int pending) 5418 { 5419 struct nfsrvsetacldsdorpc *drpc; 5420 5421 drpc = (struct nfsrvsetacldsdorpc *)arg; 5422 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 5423 drpc->vp, drpc->nmp, drpc->aclp); 5424 drpc->done = 1; 5425 } 5426 5427 static int 5428 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5429 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 5430 int *failposp) 5431 { 5432 struct nfsrvsetacldsdorpc *drpc, *tdrpc; 5433 int error, i, ret, timo; 5434 5435 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 5436 drpc = NULL; 5437 if (mirrorcnt > 1) 5438 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5439 M_WAITOK); 5440 5441 /* 5442 * Do the setattr RPC for every DS, using a separate kernel process 5443 * for every DS except the last one. 5444 */ 5445 error = 0; 5446 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5447 tdrpc->done = 0; 5448 tdrpc->inprog = 0; 5449 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5450 tdrpc->nmp = *nmpp; 5451 tdrpc->vp = vp; 5452 tdrpc->cred = cred; 5453 tdrpc->p = p; 5454 tdrpc->aclp = aclp; 5455 tdrpc->err = 0; 5456 ret = EIO; 5457 if (nfs_pnfsiothreads != 0) { 5458 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 5459 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 5460 ret); 5461 } 5462 if (ret != 0) { 5463 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 5464 aclp); 5465 if (nfsds_failerr(ret) && *failposp == -1) 5466 *failposp = i; 5467 else if (error == 0 && ret != 0) 5468 error = ret; 5469 } 5470 nmpp++; 5471 fhp++; 5472 } 5473 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 5474 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5475 *failposp = mirrorcnt - 1; 5476 else if (error == 0 && ret != 0) 5477 error = ret; 5478 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 5479 tdrpc = drpc; 5480 timo = hz / 50; /* Wait for 20msec. */ 5481 if (timo < 1) 5482 timo = 1; 5483 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5484 /* Wait for RPCs on separate threads to complete. */ 5485 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5486 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 5487 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5488 *failposp = i; 5489 else if (error == 0 && tdrpc->err != 0) 5490 error = tdrpc->err; 5491 } 5492 free(drpc, M_TEMP); 5493 return (error); 5494 } 5495 5496 /* 5497 * Getattr call to the DS for the attributes that change due to writing. 5498 */ 5499 static int 5500 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5501 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 5502 { 5503 struct nfsrv_descript *nd; 5504 int error; 5505 nfsattrbit_t attrbits; 5506 5507 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 5508 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5509 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 5510 sizeof(fhandle_t), NULL, NULL, 0, 0); 5511 NFSZERO_ATTRBIT(&attrbits); 5512 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5513 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5514 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5515 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5516 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5517 (void) nfsrv_putattrbit(nd, &attrbits); 5518 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5519 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5520 if (error != 0) { 5521 free(nd, M_TEMP); 5522 return (error); 5523 } 5524 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 5525 nd->nd_repstat); 5526 if (nd->nd_repstat == 0) { 5527 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 5528 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 5529 NULL, NULL); 5530 /* 5531 * We can only save the updated values in the extended 5532 * attribute if the vp is exclusively locked. 5533 * This should happen when any of the following operations 5534 * occur on the vnode: 5535 * Close, Delegreturn, LayoutCommit, LayoutReturn 5536 * As such, the updated extended attribute should get saved 5537 * before nfsrv_checkdsattr() returns 0 and allows the cached 5538 * attributes to be returned without calling this function. 5539 */ 5540 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 5541 error = nfsrv_setextattr(vp, nap, p); 5542 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 5543 error); 5544 } 5545 } else 5546 error = nd->nd_repstat; 5547 m_freem(nd->nd_mrep); 5548 free(nd, M_TEMP); 5549 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 5550 return (error); 5551 } 5552 5553 /* 5554 * Get the device id and file handle for a DS file. 5555 */ 5556 int 5557 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 5558 fhandle_t *fhp, char *devid) 5559 { 5560 int buflen, error; 5561 char *buf; 5562 5563 buflen = 1024; 5564 buf = malloc(buflen, M_TEMP, M_WAITOK); 5565 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 5566 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 5567 free(buf, M_TEMP); 5568 return (error); 5569 } 5570 5571 /* 5572 * Do a Lookup against the DS for the filename. 5573 */ 5574 static int 5575 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 5576 struct vnode **nvpp, NFSPROC_T *p) 5577 { 5578 struct nameidata named; 5579 struct ucred *tcred; 5580 char *bufp; 5581 u_long *hashp; 5582 struct vnode *nvp; 5583 int error; 5584 5585 tcred = newnfs_getcred(); 5586 named.ni_cnd.cn_nameiop = LOOKUP; 5587 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 5588 named.ni_cnd.cn_cred = tcred; 5589 named.ni_cnd.cn_thread = p; 5590 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 5591 nfsvno_setpathbuf(&named, &bufp, &hashp); 5592 named.ni_cnd.cn_nameptr = bufp; 5593 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 5594 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 5595 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 5596 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 5597 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 5598 NFSFREECRED(tcred); 5599 nfsvno_relpathbuf(&named); 5600 if (error == 0) 5601 *nvpp = nvp; 5602 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 5603 return (error); 5604 } 5605 5606 /* 5607 * Set the file handle to the correct one. 5608 */ 5609 static void 5610 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 5611 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 5612 { 5613 struct nfsnode *np; 5614 int ret; 5615 5616 np = VTONFS(nvp); 5617 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 5618 /* 5619 * We can only do a vn_set_extattr() if the vnode is exclusively 5620 * locked and vn_start_write() has been done. If devid != NULL or 5621 * fnamep != NULL or the vnode is shared locked, vn_start_write() 5622 * may not have been done. 5623 * If not done now, it will be done on a future call. 5624 */ 5625 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 5626 LK_EXCLUSIVE) 5627 ret = vn_extattr_set(vp, IO_NODELOCKED, 5628 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 5629 (char *)pf, p); 5630 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 5631 } 5632 5633 /* 5634 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 5635 * when the DS has failed. 5636 */ 5637 void 5638 nfsrv_killrpcs(struct nfsmount *nmp) 5639 { 5640 5641 /* 5642 * Call newnfs_nmcancelreqs() to cause 5643 * any RPCs in progress on the mount point to 5644 * fail. 5645 * This will cause any process waiting for an 5646 * RPC to complete while holding a vnode lock 5647 * on the mounted-on vnode (such as "df" or 5648 * a non-forced "umount") to fail. 5649 * This will unlock the mounted-on vnode so 5650 * a forced dismount can succeed. 5651 * The NFSMNTP_CANCELRPCS flag should be set when this function is 5652 * called. 5653 */ 5654 newnfs_nmcancelreqs(nmp); 5655 } 5656 5657 /* 5658 * Sum up the statfs info for each of the DSs, so that the client will 5659 * receive the total for all DSs. 5660 */ 5661 static int 5662 nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp) 5663 { 5664 struct statfs *tsf; 5665 struct nfsdevice *ds; 5666 struct vnode **dvpp, **tdvpp, *dvp; 5667 uint64_t tot; 5668 int cnt, error = 0, i; 5669 5670 if (nfsrv_devidcnt <= 0) 5671 return (ENXIO); 5672 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 5673 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 5674 5675 /* Get an array of the dvps for the DSs. */ 5676 tdvpp = dvpp; 5677 i = 0; 5678 NFSDDSLOCK(); 5679 /* First, search for matches for same file system. */ 5680 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5681 if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 && 5682 ds->nfsdev_mdsfsid.val[0] == mp->mnt_stat.f_fsid.val[0] && 5683 ds->nfsdev_mdsfsid.val[1] == mp->mnt_stat.f_fsid.val[1]) { 5684 if (++i > nfsrv_devidcnt) 5685 break; 5686 *tdvpp++ = ds->nfsdev_dvp; 5687 } 5688 } 5689 /* 5690 * If no matches for same file system, total all servers not assigned 5691 * to a file system. 5692 */ 5693 if (i == 0) { 5694 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5695 if (ds->nfsdev_nmp != NULL && 5696 ds->nfsdev_mdsisset == 0) { 5697 if (++i > nfsrv_devidcnt) 5698 break; 5699 *tdvpp++ = ds->nfsdev_dvp; 5700 } 5701 } 5702 } 5703 NFSDDSUNLOCK(); 5704 cnt = i; 5705 5706 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 5707 tdvpp = dvpp; 5708 for (i = 0; i < cnt && error == 0; i++) { 5709 dvp = *tdvpp++; 5710 error = VFS_STATFS(dvp->v_mount, tsf); 5711 if (error == 0) { 5712 if (sf->f_bsize == 0) { 5713 if (tsf->f_bsize > 0) 5714 sf->f_bsize = tsf->f_bsize; 5715 else 5716 sf->f_bsize = 8192; 5717 } 5718 if (tsf->f_blocks > 0) { 5719 if (sf->f_bsize != tsf->f_bsize) { 5720 tot = tsf->f_blocks * tsf->f_bsize; 5721 sf->f_blocks += (tot / sf->f_bsize); 5722 } else 5723 sf->f_blocks += tsf->f_blocks; 5724 } 5725 if (tsf->f_bfree > 0) { 5726 if (sf->f_bsize != tsf->f_bsize) { 5727 tot = tsf->f_bfree * tsf->f_bsize; 5728 sf->f_bfree += (tot / sf->f_bsize); 5729 } else 5730 sf->f_bfree += tsf->f_bfree; 5731 } 5732 if (tsf->f_bavail > 0) { 5733 if (sf->f_bsize != tsf->f_bsize) { 5734 tot = tsf->f_bavail * tsf->f_bsize; 5735 sf->f_bavail += (tot / sf->f_bsize); 5736 } else 5737 sf->f_bavail += tsf->f_bavail; 5738 } 5739 } 5740 } 5741 free(tsf, M_TEMP); 5742 free(dvpp, M_TEMP); 5743 return (error); 5744 } 5745 5746 /* 5747 * Set an NFSv4 acl. 5748 */ 5749 int 5750 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 5751 { 5752 int error; 5753 5754 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 5755 error = NFSERR_ATTRNOTSUPP; 5756 goto out; 5757 } 5758 /* 5759 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 5760 * Make sure it has enough room for that - splitting every entry 5761 * into two and appending "canonical six" entries at the end. 5762 * Cribbed out of kern/vfs_acl.c - Rick M. 5763 */ 5764 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 5765 error = NFSERR_ATTRNOTSUPP; 5766 goto out; 5767 } 5768 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 5769 if (error == 0) { 5770 error = nfsrv_dssetacl(vp, aclp, cred, p); 5771 if (error == ENOENT) 5772 error = 0; 5773 } 5774 5775 out: 5776 NFSEXITCODE(error); 5777 return (error); 5778 } 5779 5780 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 5781 5782 /* 5783 * Called once to initialize data structures... 5784 */ 5785 static int 5786 nfsd_modevent(module_t mod, int type, void *data) 5787 { 5788 int error = 0, i; 5789 static int loaded = 0; 5790 5791 switch (type) { 5792 case MOD_LOAD: 5793 if (loaded) 5794 goto out; 5795 newnfs_portinit(); 5796 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 5797 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 5798 MTX_DEF); 5799 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 5800 MTX_DEF); 5801 } 5802 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 5803 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 5804 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 5805 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 5806 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 5807 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 5808 nfsrvd_initcache(); 5809 nfsd_init(); 5810 NFSD_LOCK(); 5811 nfsrvd_init(0); 5812 NFSD_UNLOCK(); 5813 nfsd_mntinit(); 5814 #ifdef VV_DISABLEDELEG 5815 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 5816 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 5817 #endif 5818 nfsd_call_servertimer = nfsrv_servertimer; 5819 nfsd_call_nfsd = nfssvc_nfsd; 5820 loaded = 1; 5821 break; 5822 5823 case MOD_UNLOAD: 5824 if (newnfs_numnfsd != 0) { 5825 error = EBUSY; 5826 break; 5827 } 5828 5829 #ifdef VV_DISABLEDELEG 5830 vn_deleg_ops.vndeleg_recall = NULL; 5831 vn_deleg_ops.vndeleg_disable = NULL; 5832 #endif 5833 nfsd_call_servertimer = NULL; 5834 nfsd_call_nfsd = NULL; 5835 5836 /* Clean out all NFSv4 state. */ 5837 nfsrv_throwawayallstate(curthread); 5838 5839 /* Clean the NFS server reply cache */ 5840 nfsrvd_cleancache(); 5841 5842 /* Free up the krpc server pool. */ 5843 if (nfsrvd_pool != NULL) 5844 svcpool_destroy(nfsrvd_pool); 5845 5846 /* and get rid of the locks */ 5847 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 5848 mtx_destroy(&nfsrchash_table[i].mtx); 5849 mtx_destroy(&nfsrcahash_table[i].mtx); 5850 } 5851 mtx_destroy(&nfsrc_udpmtx); 5852 mtx_destroy(&nfs_v4root_mutex); 5853 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 5854 mtx_destroy(&nfsrv_dontlistlock_mtx); 5855 mtx_destroy(&nfsrv_recalllock_mtx); 5856 for (i = 0; i < nfsrv_sessionhashsize; i++) 5857 mtx_destroy(&nfssessionhash[i].mtx); 5858 if (nfslayouthash != NULL) { 5859 for (i = 0; i < nfsrv_layouthashsize; i++) 5860 mtx_destroy(&nfslayouthash[i].mtx); 5861 free(nfslayouthash, M_NFSDSESSION); 5862 } 5863 lockdestroy(&nfsv4root_mnt.mnt_explock); 5864 free(nfsclienthash, M_NFSDCLIENT); 5865 free(nfslockhash, M_NFSDLOCKFILE); 5866 free(nfssessionhash, M_NFSDSESSION); 5867 loaded = 0; 5868 break; 5869 default: 5870 error = EOPNOTSUPP; 5871 break; 5872 } 5873 5874 out: 5875 NFSEXITCODE(error); 5876 return (error); 5877 } 5878 static moduledata_t nfsd_mod = { 5879 "nfsd", 5880 nfsd_modevent, 5881 NULL, 5882 }; 5883 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 5884 5885 /* So that loader and kldload(2) can find us, wherever we are.. */ 5886 MODULE_VERSION(nfsd, 1); 5887 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 5888 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1); 5889 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 5890 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 5891 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 5892 5893