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 <security/mac/mac_framework.h> 50 #include <sys/filio.h> 51 #include <sys/hash.h> 52 #include <sys/sysctl.h> 53 #include <nlm/nlm_prot.h> 54 #include <nlm/nlm.h> 55 56 FEATURE(nfsd, "NFSv4 server"); 57 58 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 59 extern int nfsrv_useacl; 60 extern int newnfs_numnfsd; 61 extern struct mount nfsv4root_mnt; 62 extern struct nfsrv_stablefirst nfsrv_stablefirst; 63 extern void (*nfsd_call_servertimer)(void); 64 extern SVCPOOL *nfsrvd_pool; 65 extern struct nfsv4lock nfsd_suspend_lock; 66 extern struct nfsclienthashhead *nfsclienthash; 67 extern struct nfslockhashhead *nfslockhash; 68 extern struct nfssessionhash *nfssessionhash; 69 extern int nfsrv_sessionhashsize; 70 extern struct nfsstatsv1 nfsstatsv1; 71 extern struct nfslayouthash *nfslayouthash; 72 extern int nfsrv_layouthashsize; 73 extern struct mtx nfsrv_dslock_mtx; 74 extern int nfs_pnfsiothreads; 75 extern struct nfsdontlisthead nfsrv_dontlisthead; 76 extern volatile int nfsrv_dontlistlen; 77 extern volatile int nfsrv_devidcnt; 78 extern int nfsrv_maxpnfsmirror; 79 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 80 NFSDLOCKMUTEX; 81 NFSSTATESPINLOCK; 82 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 83 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 84 struct mtx nfsrc_udpmtx; 85 struct mtx nfs_v4root_mutex; 86 struct mtx nfsrv_dontlistlock_mtx; 87 struct mtx nfsrv_recalllock_mtx; 88 struct nfsrvfh nfs_rootfh, nfs_pubfh; 89 int nfs_pubfhset = 0, nfs_rootfhset = 0; 90 struct proc *nfsd_master_proc = NULL; 91 int nfsd_debuglevel = 0; 92 static pid_t nfsd_master_pid = (pid_t)-1; 93 static char nfsd_master_comm[MAXCOMLEN + 1]; 94 static struct timeval nfsd_master_start; 95 static uint32_t nfsv4_sysid = 0; 96 static fhandle_t zerofh; 97 98 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 99 struct ucred *); 100 101 int nfsrv_enable_crossmntpt = 1; 102 static int nfs_commit_blks; 103 static int nfs_commit_miss; 104 extern int nfsrv_issuedelegs; 105 extern int nfsrv_dolocallocks; 106 extern int nfsd_enable_stringtouid; 107 extern struct nfsdevicehead nfsrv_devidhead; 108 109 static int nfsrv_createiovec(int, struct mbuf **, struct mbuf **, 110 struct iovec **); 111 static int nfsrv_createiovecw(int, struct mbuf *, char *, struct iovec **, 112 int *); 113 static void nfsrv_pnfscreate(struct vnode *, struct vattr *, struct ucred *, 114 NFSPROC_T *); 115 static void nfsrv_pnfsremovesetup(struct vnode *, NFSPROC_T *, struct vnode **, 116 int *, char *, fhandle_t *); 117 static void nfsrv_pnfsremove(struct vnode **, int, char *, fhandle_t *, 118 NFSPROC_T *); 119 static int nfsrv_proxyds(struct vnode *, off_t, int, struct ucred *, 120 struct thread *, int, struct mbuf **, char *, struct mbuf **, 121 struct nfsvattr *, struct acl *, off_t *, int, bool *); 122 static int nfsrv_setextattr(struct vnode *, struct nfsvattr *, NFSPROC_T *); 123 static int nfsrv_readdsrpc(fhandle_t *, off_t, int, struct ucred *, 124 NFSPROC_T *, struct nfsmount *, struct mbuf **, struct mbuf **); 125 static int nfsrv_writedsrpc(fhandle_t *, off_t, int, struct ucred *, 126 NFSPROC_T *, struct vnode *, struct nfsmount **, int, struct mbuf **, 127 char *, int *); 128 static int nfsrv_allocatedsrpc(fhandle_t *, off_t, off_t, struct ucred *, 129 NFSPROC_T *, struct vnode *, struct nfsmount **, int, int *); 130 static int nfsrv_setacldsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 131 struct vnode *, struct nfsmount **, int, struct acl *, int *); 132 static int nfsrv_setattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 133 struct vnode *, struct nfsmount **, int, struct nfsvattr *, int *); 134 static int nfsrv_getattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 135 struct vnode *, struct nfsmount *, struct nfsvattr *); 136 static int nfsrv_seekdsrpc(fhandle_t *, off_t *, int, bool *, struct ucred *, 137 NFSPROC_T *, struct nfsmount *); 138 static int nfsrv_putfhname(fhandle_t *, char *); 139 static int nfsrv_pnfslookupds(struct vnode *, struct vnode *, 140 struct pnfsdsfile *, struct vnode **, NFSPROC_T *); 141 static void nfsrv_pnfssetfh(struct vnode *, struct pnfsdsfile *, char *, char *, 142 struct vnode *, NFSPROC_T *); 143 static int nfsrv_dsremove(struct vnode *, char *, struct ucred *, NFSPROC_T *); 144 static int nfsrv_dssetacl(struct vnode *, struct acl *, struct ucred *, 145 NFSPROC_T *); 146 static int nfsrv_pnfsstatfs(struct statfs *, struct mount *); 147 148 int nfs_pnfsio(task_fn_t *, void *); 149 150 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 151 "NFS server"); 152 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 153 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 154 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 155 0, ""); 156 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 157 0, ""); 158 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 159 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 160 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 161 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 162 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 163 0, "Debug level for NFS server"); 164 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 165 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 166 static int nfsrv_pnfsgetdsattr = 1; 167 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsgetdsattr, CTLFLAG_RW, 168 &nfsrv_pnfsgetdsattr, 0, "When set getattr gets DS attributes via RPC"); 169 170 /* 171 * nfsrv_dsdirsize can only be increased and only when the nfsd threads are 172 * not running. 173 * The dsN subdirectories for the increased values must have been created 174 * on all DS servers before this increase is done. 175 */ 176 u_int nfsrv_dsdirsize = 20; 177 static int 178 sysctl_dsdirsize(SYSCTL_HANDLER_ARGS) 179 { 180 int error, newdsdirsize; 181 182 newdsdirsize = nfsrv_dsdirsize; 183 error = sysctl_handle_int(oidp, &newdsdirsize, 0, req); 184 if (error != 0 || req->newptr == NULL) 185 return (error); 186 if (newdsdirsize <= nfsrv_dsdirsize || newdsdirsize > 10000 || 187 newnfs_numnfsd != 0) 188 return (EINVAL); 189 nfsrv_dsdirsize = newdsdirsize; 190 return (0); 191 } 192 SYSCTL_PROC(_vfs_nfsd, OID_AUTO, dsdirsize, 193 CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RW, 0, sizeof(nfsrv_dsdirsize), 194 sysctl_dsdirsize, "IU", "Number of dsN subdirs on the DS servers"); 195 196 #define MAX_REORDERED_RPC 16 197 #define NUM_HEURISTIC 1031 198 #define NHUSE_INIT 64 199 #define NHUSE_INC 16 200 #define NHUSE_MAX 2048 201 202 static struct nfsheur { 203 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 204 off_t nh_nextoff; /* next offset for sequential detection */ 205 int nh_use; /* use count for selection */ 206 int nh_seqcount; /* heuristic */ 207 } nfsheur[NUM_HEURISTIC]; 208 209 210 /* 211 * Heuristic to detect sequential operation. 212 */ 213 static struct nfsheur * 214 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 215 { 216 struct nfsheur *nh; 217 int hi, try; 218 219 /* Locate best candidate. */ 220 try = 32; 221 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 222 nh = &nfsheur[hi]; 223 while (try--) { 224 if (nfsheur[hi].nh_vp == vp) { 225 nh = &nfsheur[hi]; 226 break; 227 } 228 if (nfsheur[hi].nh_use > 0) 229 --nfsheur[hi].nh_use; 230 hi = (hi + 1) % NUM_HEURISTIC; 231 if (nfsheur[hi].nh_use < nh->nh_use) 232 nh = &nfsheur[hi]; 233 } 234 235 /* Initialize hint if this is a new file. */ 236 if (nh->nh_vp != vp) { 237 nh->nh_vp = vp; 238 nh->nh_nextoff = uio->uio_offset; 239 nh->nh_use = NHUSE_INIT; 240 if (uio->uio_offset == 0) 241 nh->nh_seqcount = 4; 242 else 243 nh->nh_seqcount = 1; 244 } 245 246 /* Calculate heuristic. */ 247 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 248 uio->uio_offset == nh->nh_nextoff) { 249 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 250 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 251 if (nh->nh_seqcount > IO_SEQMAX) 252 nh->nh_seqcount = IO_SEQMAX; 253 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 254 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 255 /* Probably a reordered RPC, leave seqcount alone. */ 256 } else if (nh->nh_seqcount > 1) { 257 nh->nh_seqcount /= 2; 258 } else { 259 nh->nh_seqcount = 0; 260 } 261 nh->nh_use += NHUSE_INC; 262 if (nh->nh_use > NHUSE_MAX) 263 nh->nh_use = NHUSE_MAX; 264 return (nh); 265 } 266 267 /* 268 * Get attributes into nfsvattr structure. 269 */ 270 int 271 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, 272 struct nfsrv_descript *nd, struct thread *p, int vpislocked, 273 nfsattrbit_t *attrbitp) 274 { 275 int error, gotattr, lockedit = 0; 276 struct nfsvattr na; 277 278 if (vpislocked == 0) { 279 /* 280 * When vpislocked == 0, the vnode is either exclusively 281 * locked by this thread or not locked by this thread. 282 * As such, shared lock it, if not exclusively locked. 283 */ 284 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 285 lockedit = 1; 286 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 287 } 288 } 289 290 /* 291 * Acquire the Change, Size, TimeAccess, TimeModify and SpaceUsed 292 * attributes, as required. 293 * This needs to be done for regular files if: 294 * - non-NFSv4 RPCs or 295 * - when attrbitp == NULL or 296 * - an NFSv4 RPC with any of the above attributes in attrbitp. 297 * A return of 0 for nfsrv_proxyds() indicates that it has acquired 298 * these attributes. nfsrv_proxyds() will return an error if the 299 * server is not a pNFS one. 300 */ 301 gotattr = 0; 302 if (vp->v_type == VREG && nfsrv_devidcnt > 0 && (attrbitp == NULL || 303 (nd->nd_flag & ND_NFSV4) == 0 || 304 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_CHANGE) || 305 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) || 306 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESS) || 307 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFY) || 308 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEUSED))) { 309 error = nfsrv_proxyds(vp, 0, 0, nd->nd_cred, p, 310 NFSPROC_GETATTR, NULL, NULL, NULL, &na, NULL, NULL, 0, 311 NULL); 312 if (error == 0) 313 gotattr = 1; 314 } 315 316 error = VOP_GETATTR(vp, &nvap->na_vattr, nd->nd_cred); 317 if (lockedit != 0) 318 NFSVOPUNLOCK(vp); 319 320 /* 321 * If we got the Change, Size and Modify Time from the DS, 322 * replace them. 323 */ 324 if (gotattr != 0) { 325 nvap->na_atime = na.na_atime; 326 nvap->na_mtime = na.na_mtime; 327 nvap->na_filerev = na.na_filerev; 328 nvap->na_size = na.na_size; 329 nvap->na_bytes = na.na_bytes; 330 } 331 NFSD_DEBUG(4, "nfsvno_getattr: gotattr=%d err=%d chg=%ju\n", gotattr, 332 error, (uintmax_t)na.na_filerev); 333 334 NFSEXITCODE(error); 335 return (error); 336 } 337 338 /* 339 * Get a file handle for a vnode. 340 */ 341 int 342 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 343 { 344 int error; 345 346 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 347 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 348 error = VOP_VPTOFH(vp, &fhp->fh_fid); 349 350 NFSEXITCODE(error); 351 return (error); 352 } 353 354 /* 355 * Perform access checking for vnodes obtained from file handles that would 356 * refer to files already opened by a Unix client. You cannot just use 357 * vn_writechk() and VOP_ACCESSX() for two reasons. 358 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 359 * case. 360 * 2 - The owner is to be given access irrespective of mode bits for some 361 * operations, so that processes that chmod after opening a file don't 362 * break. 363 */ 364 int 365 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 366 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 367 u_int32_t *supportedtypep) 368 { 369 struct vattr vattr; 370 int error = 0, getret = 0; 371 372 if (vpislocked == 0) { 373 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 374 error = EPERM; 375 goto out; 376 } 377 } 378 if (accmode & VWRITE) { 379 /* Just vn_writechk() changed to check rdonly */ 380 /* 381 * Disallow write attempts on read-only file systems; 382 * unless the file is a socket or a block or character 383 * device resident on the file system. 384 */ 385 if (NFSVNO_EXRDONLY(exp) || 386 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 387 switch (vp->v_type) { 388 case VREG: 389 case VDIR: 390 case VLNK: 391 error = EROFS; 392 default: 393 break; 394 } 395 } 396 /* 397 * If there's shared text associated with 398 * the inode, try to free it up once. If 399 * we fail, we can't allow writing. 400 */ 401 if (VOP_IS_TEXT(vp) && error == 0) 402 error = ETXTBSY; 403 } 404 if (error != 0) { 405 if (vpislocked == 0) 406 NFSVOPUNLOCK(vp); 407 goto out; 408 } 409 410 /* 411 * Should the override still be applied when ACLs are enabled? 412 */ 413 error = VOP_ACCESSX(vp, accmode, cred, p); 414 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 415 /* 416 * Try again with VEXPLICIT_DENY, to see if the test for 417 * deletion is supported. 418 */ 419 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 420 if (error == 0) { 421 if (vp->v_type == VDIR) { 422 accmode &= ~(VDELETE | VDELETE_CHILD); 423 accmode |= VWRITE; 424 error = VOP_ACCESSX(vp, accmode, cred, p); 425 } else if (supportedtypep != NULL) { 426 *supportedtypep &= ~NFSACCESS_DELETE; 427 } 428 } 429 } 430 431 /* 432 * Allow certain operations for the owner (reads and writes 433 * on files that are already open). 434 */ 435 if (override != NFSACCCHK_NOOVERRIDE && 436 (error == EPERM || error == EACCES)) { 437 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 438 error = 0; 439 else if (override & NFSACCCHK_ALLOWOWNER) { 440 getret = VOP_GETATTR(vp, &vattr, cred); 441 if (getret == 0 && cred->cr_uid == vattr.va_uid) 442 error = 0; 443 } 444 } 445 if (vpislocked == 0) 446 NFSVOPUNLOCK(vp); 447 448 out: 449 NFSEXITCODE(error); 450 return (error); 451 } 452 453 /* 454 * Set attribute(s) vnop. 455 */ 456 int 457 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 458 struct thread *p, struct nfsexstuff *exp) 459 { 460 u_quad_t savsize = 0; 461 int error, savedit; 462 463 /* 464 * If this is an exported file system and a pNFS service is running, 465 * don't VOP_SETATTR() of size for the MDS file system. 466 */ 467 savedit = 0; 468 error = 0; 469 if (vp->v_type == VREG && (vp->v_mount->mnt_flag & MNT_EXPORTED) != 0 && 470 nfsrv_devidcnt != 0 && nvap->na_vattr.va_size != VNOVAL && 471 nvap->na_vattr.va_size > 0) { 472 savsize = nvap->na_vattr.va_size; 473 nvap->na_vattr.va_size = VNOVAL; 474 if (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 475 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 476 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 477 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 478 nvap->na_vattr.va_mtime.tv_sec != VNOVAL) 479 savedit = 1; 480 else 481 savedit = 2; 482 } 483 if (savedit != 2) 484 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 485 if (savedit != 0) 486 nvap->na_vattr.va_size = savsize; 487 if (error == 0 && (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 488 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 489 nvap->na_vattr.va_size != VNOVAL || 490 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 491 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 492 nvap->na_vattr.va_mtime.tv_sec != VNOVAL)) { 493 /* For a pNFS server, set the attributes on the DS file. */ 494 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETATTR, 495 NULL, NULL, NULL, nvap, NULL, NULL, 0, NULL); 496 if (error == ENOENT) 497 error = 0; 498 } 499 NFSEXITCODE(error); 500 return (error); 501 } 502 503 /* 504 * Set up nameidata for a lookup() call and do it. 505 */ 506 int 507 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 508 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p, 509 struct vnode **retdirp) 510 { 511 struct componentname *cnp = &ndp->ni_cnd; 512 int i; 513 struct iovec aiov; 514 struct uio auio; 515 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 516 int error = 0; 517 char *cp; 518 519 *retdirp = NULL; 520 cnp->cn_nameptr = cnp->cn_pnbuf; 521 ndp->ni_lcf = 0; 522 /* 523 * Extract and set starting directory. 524 */ 525 if (dp->v_type != VDIR) { 526 if (islocked) 527 vput(dp); 528 else 529 vrele(dp); 530 nfsvno_relpathbuf(ndp); 531 error = ENOTDIR; 532 goto out1; 533 } 534 if (islocked) 535 NFSVOPUNLOCK(dp); 536 VREF(dp); 537 *retdirp = dp; 538 if (NFSVNO_EXRDONLY(exp)) 539 cnp->cn_flags |= RDONLY; 540 ndp->ni_segflg = UIO_SYSSPACE; 541 542 if (nd->nd_flag & ND_PUBLOOKUP) { 543 ndp->ni_loopcnt = 0; 544 if (cnp->cn_pnbuf[0] == '/') { 545 vrele(dp); 546 /* 547 * Check for degenerate pathnames here, since lookup() 548 * panics on them. 549 */ 550 for (i = 1; i < ndp->ni_pathlen; i++) 551 if (cnp->cn_pnbuf[i] != '/') 552 break; 553 if (i == ndp->ni_pathlen) { 554 error = NFSERR_ACCES; 555 goto out; 556 } 557 dp = rootvnode; 558 VREF(dp); 559 } 560 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 561 (nd->nd_flag & ND_NFSV4) == 0) { 562 /* 563 * Only cross mount points for NFSv4 when doing a 564 * mount while traversing the file system above 565 * the mount point, unless nfsrv_enable_crossmntpt is set. 566 */ 567 cnp->cn_flags |= NOCROSSMOUNT; 568 } 569 570 /* 571 * Initialize for scan, set ni_startdir and bump ref on dp again 572 * because lookup() will dereference ni_startdir. 573 */ 574 575 cnp->cn_thread = p; 576 ndp->ni_startdir = dp; 577 ndp->ni_rootdir = rootvnode; 578 ndp->ni_topdir = NULL; 579 580 if (!lockleaf) 581 cnp->cn_flags |= LOCKLEAF; 582 for (;;) { 583 cnp->cn_nameptr = cnp->cn_pnbuf; 584 /* 585 * Call lookup() to do the real work. If an error occurs, 586 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 587 * we do not have to dereference anything before returning. 588 * In either case ni_startdir will be dereferenced and NULLed 589 * out. 590 */ 591 error = lookup(ndp); 592 if (error) 593 break; 594 595 /* 596 * Check for encountering a symbolic link. Trivial 597 * termination occurs if no symlink encountered. 598 */ 599 if ((cnp->cn_flags & ISSYMLINK) == 0) { 600 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 601 nfsvno_relpathbuf(ndp); 602 if (ndp->ni_vp && !lockleaf) 603 NFSVOPUNLOCK(ndp->ni_vp); 604 break; 605 } 606 607 /* 608 * Validate symlink 609 */ 610 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 611 NFSVOPUNLOCK(ndp->ni_dvp); 612 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 613 error = EINVAL; 614 goto badlink2; 615 } 616 617 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 618 error = ELOOP; 619 goto badlink2; 620 } 621 if (ndp->ni_pathlen > 1) 622 cp = uma_zalloc(namei_zone, M_WAITOK); 623 else 624 cp = cnp->cn_pnbuf; 625 aiov.iov_base = cp; 626 aiov.iov_len = MAXPATHLEN; 627 auio.uio_iov = &aiov; 628 auio.uio_iovcnt = 1; 629 auio.uio_offset = 0; 630 auio.uio_rw = UIO_READ; 631 auio.uio_segflg = UIO_SYSSPACE; 632 auio.uio_td = NULL; 633 auio.uio_resid = MAXPATHLEN; 634 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 635 if (error) { 636 badlink1: 637 if (ndp->ni_pathlen > 1) 638 uma_zfree(namei_zone, cp); 639 badlink2: 640 vrele(ndp->ni_dvp); 641 vput(ndp->ni_vp); 642 break; 643 } 644 linklen = MAXPATHLEN - auio.uio_resid; 645 if (linklen == 0) { 646 error = ENOENT; 647 goto badlink1; 648 } 649 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 650 error = ENAMETOOLONG; 651 goto badlink1; 652 } 653 654 /* 655 * Adjust or replace path 656 */ 657 if (ndp->ni_pathlen > 1) { 658 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 659 uma_zfree(namei_zone, cnp->cn_pnbuf); 660 cnp->cn_pnbuf = cp; 661 } else 662 cnp->cn_pnbuf[linklen] = '\0'; 663 ndp->ni_pathlen += linklen; 664 665 /* 666 * Cleanup refs for next loop and check if root directory 667 * should replace current directory. Normally ni_dvp 668 * becomes the new base directory and is cleaned up when 669 * we loop. Explicitly null pointers after invalidation 670 * to clarify operation. 671 */ 672 vput(ndp->ni_vp); 673 ndp->ni_vp = NULL; 674 675 if (cnp->cn_pnbuf[0] == '/') { 676 vrele(ndp->ni_dvp); 677 ndp->ni_dvp = ndp->ni_rootdir; 678 VREF(ndp->ni_dvp); 679 } 680 ndp->ni_startdir = ndp->ni_dvp; 681 ndp->ni_dvp = NULL; 682 } 683 if (!lockleaf) 684 cnp->cn_flags &= ~LOCKLEAF; 685 686 out: 687 if (error) { 688 nfsvno_relpathbuf(ndp); 689 ndp->ni_vp = NULL; 690 ndp->ni_dvp = NULL; 691 ndp->ni_startdir = NULL; 692 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 693 ndp->ni_dvp = NULL; 694 } 695 696 out1: 697 NFSEXITCODE2(error, nd); 698 return (error); 699 } 700 701 /* 702 * Set up a pathname buffer and return a pointer to it and, optionally 703 * set a hash pointer. 704 */ 705 void 706 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 707 { 708 struct componentname *cnp = &ndp->ni_cnd; 709 710 cnp->cn_flags |= (NOMACCHECK | HASBUF); 711 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 712 if (hashpp != NULL) 713 *hashpp = NULL; 714 *bufpp = cnp->cn_pnbuf; 715 } 716 717 /* 718 * Release the above path buffer, if not released by nfsvno_namei(). 719 */ 720 void 721 nfsvno_relpathbuf(struct nameidata *ndp) 722 { 723 724 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 725 panic("nfsrelpath"); 726 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 727 ndp->ni_cnd.cn_flags &= ~HASBUF; 728 } 729 730 /* 731 * Readlink vnode op into an mbuf list. 732 */ 733 int 734 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p, 735 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 736 { 737 struct iovec *iv; 738 struct uio io, *uiop = &io; 739 struct mbuf *mp, *mp3; 740 int len, tlen, error = 0; 741 742 len = NFS_MAXPATHLEN; 743 uiop->uio_iovcnt = nfsrv_createiovec(len, &mp3, &mp, &iv); 744 uiop->uio_iov = iv; 745 uiop->uio_offset = 0; 746 uiop->uio_resid = len; 747 uiop->uio_rw = UIO_READ; 748 uiop->uio_segflg = UIO_SYSSPACE; 749 uiop->uio_td = NULL; 750 error = VOP_READLINK(vp, uiop, cred); 751 free(iv, M_TEMP); 752 if (error) { 753 m_freem(mp3); 754 *lenp = 0; 755 goto out; 756 } 757 if (uiop->uio_resid > 0) { 758 len -= uiop->uio_resid; 759 tlen = NFSM_RNDUP(len); 760 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len); 761 } 762 *lenp = len; 763 *mpp = mp3; 764 *mpendp = mp; 765 766 out: 767 NFSEXITCODE(error); 768 return (error); 769 } 770 771 /* 772 * Create an mbuf chain and an associated iovec that can be used to Read 773 * or Getextattr of data. 774 * Upon success, return pointers to the first and last mbufs in the chain 775 * plus the malloc'd iovec and its iovlen. 776 */ 777 static int 778 nfsrv_createiovec(int len, struct mbuf **mpp, struct mbuf **mpendp, 779 struct iovec **ivp) 780 { 781 struct mbuf *m, *m2 = NULL, *m3; 782 struct iovec *iv; 783 int i, left, siz; 784 785 left = len; 786 m3 = NULL; 787 /* 788 * Generate the mbuf list with the uio_iov ref. to it. 789 */ 790 i = 0; 791 while (left > 0) { 792 NFSMGET(m); 793 MCLGET(m, M_WAITOK); 794 m->m_len = 0; 795 siz = min(M_TRAILINGSPACE(m), left); 796 left -= siz; 797 i++; 798 if (m3) 799 m2->m_next = m; 800 else 801 m3 = m; 802 m2 = m; 803 } 804 *ivp = iv = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 805 m = m3; 806 left = len; 807 i = 0; 808 while (left > 0) { 809 if (m == NULL) 810 panic("nfsvno_read iov"); 811 siz = min(M_TRAILINGSPACE(m), left); 812 if (siz > 0) { 813 iv->iov_base = mtod(m, caddr_t) + m->m_len; 814 iv->iov_len = siz; 815 m->m_len += siz; 816 left -= siz; 817 iv++; 818 i++; 819 } 820 m = m->m_next; 821 } 822 *mpp = m3; 823 *mpendp = m2; 824 return (i); 825 } 826 827 /* 828 * Read vnode op call into mbuf list. 829 */ 830 int 831 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 832 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp) 833 { 834 struct mbuf *m; 835 struct iovec *iv; 836 int error = 0, len, tlen, ioflag = 0; 837 struct mbuf *m3; 838 struct uio io, *uiop = &io; 839 struct nfsheur *nh; 840 841 /* 842 * Attempt to read from a DS file. A return of ENOENT implies 843 * there is no DS file to read. 844 */ 845 error = nfsrv_proxyds(vp, off, cnt, cred, p, NFSPROC_READDS, mpp, 846 NULL, mpendp, NULL, NULL, NULL, 0, NULL); 847 if (error != ENOENT) 848 return (error); 849 850 len = NFSM_RNDUP(cnt); 851 uiop->uio_iovcnt = nfsrv_createiovec(len, &m3, &m, &iv); 852 uiop->uio_iov = iv; 853 uiop->uio_offset = off; 854 uiop->uio_resid = len; 855 uiop->uio_rw = UIO_READ; 856 uiop->uio_segflg = UIO_SYSSPACE; 857 uiop->uio_td = NULL; 858 nh = nfsrv_sequential_heuristic(uiop, vp); 859 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 860 /* XXX KDM make this more systematic? */ 861 nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid; 862 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 863 free(iv, M_TEMP); 864 if (error) { 865 m_freem(m3); 866 *mpp = NULL; 867 goto out; 868 } 869 nh->nh_nextoff = uiop->uio_offset; 870 tlen = len - uiop->uio_resid; 871 cnt = cnt < tlen ? cnt : tlen; 872 tlen = NFSM_RNDUP(cnt); 873 if (tlen == 0) { 874 m_freem(m3); 875 m3 = NULL; 876 } else if (len != tlen || tlen != cnt) 877 nfsrv_adj(m3, len - tlen, tlen - cnt); 878 *mpp = m3; 879 *mpendp = m; 880 881 out: 882 NFSEXITCODE(error); 883 return (error); 884 } 885 886 /* 887 * Create the iovec for the mbuf chain passed in as an argument. 888 * The "cp" argument is where the data starts within the first mbuf in 889 * the chain. It returns the iovec and the iovcnt. 890 */ 891 static int 892 nfsrv_createiovecw(int retlen, struct mbuf *m, char *cp, struct iovec **ivpp, 893 int *iovcntp) 894 { 895 struct mbuf *mp; 896 struct iovec *ivp; 897 int cnt, i, len; 898 899 /* 900 * Loop through the mbuf chain, counting how many mbufs are a 901 * part of this write operation, so the iovec size is known. 902 */ 903 cnt = 0; 904 len = retlen; 905 mp = m; 906 i = mtod(mp, caddr_t) + mp->m_len - cp; 907 while (len > 0) { 908 if (i > 0) { 909 len -= i; 910 cnt++; 911 } 912 mp = mp->m_next; 913 if (!mp) { 914 if (len > 0) 915 return (EBADRPC); 916 } else 917 i = mp->m_len; 918 } 919 920 /* Now, create the iovec. */ 921 mp = m; 922 *ivpp = ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, 923 M_WAITOK); 924 *iovcntp = cnt; 925 i = mtod(mp, caddr_t) + mp->m_len - cp; 926 len = retlen; 927 while (len > 0) { 928 if (mp == NULL) 929 panic("nfsvno_write"); 930 if (i > 0) { 931 i = min(i, len); 932 ivp->iov_base = cp; 933 ivp->iov_len = i; 934 ivp++; 935 len -= i; 936 } 937 mp = mp->m_next; 938 if (mp) { 939 i = mp->m_len; 940 cp = mtod(mp, caddr_t); 941 } 942 } 943 return (0); 944 } 945 946 /* 947 * Write vnode op from an mbuf list. 948 */ 949 int 950 nfsvno_write(struct vnode *vp, off_t off, int retlen, int *stable, 951 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 952 { 953 struct iovec *iv; 954 int cnt, ioflags, error; 955 struct uio io, *uiop = &io; 956 struct nfsheur *nh; 957 958 /* 959 * Attempt to write to a DS file. A return of ENOENT implies 960 * there is no DS file to write. 961 */ 962 error = nfsrv_proxyds(vp, off, retlen, cred, p, NFSPROC_WRITEDS, 963 &mp, cp, NULL, NULL, NULL, NULL, 0, NULL); 964 if (error != ENOENT) { 965 *stable = NFSWRITE_FILESYNC; 966 return (error); 967 } 968 969 970 if (*stable == NFSWRITE_UNSTABLE) 971 ioflags = IO_NODELOCKED; 972 else 973 ioflags = (IO_SYNC | IO_NODELOCKED); 974 error = nfsrv_createiovecw(retlen, mp, cp, &iv, &cnt); 975 if (error != 0) 976 return (error); 977 uiop->uio_iov = iv; 978 uiop->uio_iovcnt = cnt; 979 uiop->uio_resid = retlen; 980 uiop->uio_rw = UIO_WRITE; 981 uiop->uio_segflg = UIO_SYSSPACE; 982 NFSUIOPROC(uiop, p); 983 uiop->uio_offset = off; 984 nh = nfsrv_sequential_heuristic(uiop, vp); 985 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 986 /* XXX KDM make this more systematic? */ 987 nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid; 988 error = VOP_WRITE(vp, uiop, ioflags, cred); 989 if (error == 0) 990 nh->nh_nextoff = uiop->uio_offset; 991 free(iv, M_TEMP); 992 993 NFSEXITCODE(error); 994 return (error); 995 } 996 997 /* 998 * Common code for creating a regular file (plus special files for V2). 999 */ 1000 int 1001 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 1002 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 1003 int32_t *cverf, NFSDEV_T rdev, struct nfsexstuff *exp) 1004 { 1005 u_quad_t tempsize; 1006 int error; 1007 struct thread *p = curthread; 1008 1009 error = nd->nd_repstat; 1010 if (!error && ndp->ni_vp == NULL) { 1011 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 1012 vrele(ndp->ni_startdir); 1013 error = VOP_CREATE(ndp->ni_dvp, 1014 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1015 /* For a pNFS server, create the data file on a DS. */ 1016 if (error == 0 && nvap->na_type == VREG) { 1017 /* 1018 * Create a data file on a DS for a pNFS server. 1019 * This function just returns if not 1020 * running a pNFS DS or the creation fails. 1021 */ 1022 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1023 nd->nd_cred, p); 1024 } 1025 vput(ndp->ni_dvp); 1026 nfsvno_relpathbuf(ndp); 1027 if (!error) { 1028 if (*exclusive_flagp) { 1029 *exclusive_flagp = 0; 1030 NFSVNO_ATTRINIT(nvap); 1031 nvap->na_atime.tv_sec = cverf[0]; 1032 nvap->na_atime.tv_nsec = cverf[1]; 1033 error = VOP_SETATTR(ndp->ni_vp, 1034 &nvap->na_vattr, nd->nd_cred); 1035 if (error != 0) { 1036 vput(ndp->ni_vp); 1037 ndp->ni_vp = NULL; 1038 error = NFSERR_NOTSUPP; 1039 } 1040 } 1041 } 1042 /* 1043 * NFS V2 Only. nfsrvd_mknod() does this for V3. 1044 * (This implies, just get out on an error.) 1045 */ 1046 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 1047 nvap->na_type == VFIFO) { 1048 if (nvap->na_type == VCHR && rdev == 0xffffffff) 1049 nvap->na_type = VFIFO; 1050 if (nvap->na_type != VFIFO && 1051 (error = priv_check_cred(nd->nd_cred, PRIV_VFS_MKNOD_DEV))) { 1052 vrele(ndp->ni_startdir); 1053 nfsvno_relpathbuf(ndp); 1054 vput(ndp->ni_dvp); 1055 goto out; 1056 } 1057 nvap->na_rdev = rdev; 1058 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1059 &ndp->ni_cnd, &nvap->na_vattr); 1060 vput(ndp->ni_dvp); 1061 nfsvno_relpathbuf(ndp); 1062 vrele(ndp->ni_startdir); 1063 if (error) 1064 goto out; 1065 } else { 1066 vrele(ndp->ni_startdir); 1067 nfsvno_relpathbuf(ndp); 1068 vput(ndp->ni_dvp); 1069 error = ENXIO; 1070 goto out; 1071 } 1072 *vpp = ndp->ni_vp; 1073 } else { 1074 /* 1075 * Handle cases where error is already set and/or 1076 * the file exists. 1077 * 1 - clean up the lookup 1078 * 2 - iff !error and na_size set, truncate it 1079 */ 1080 vrele(ndp->ni_startdir); 1081 nfsvno_relpathbuf(ndp); 1082 *vpp = ndp->ni_vp; 1083 if (ndp->ni_dvp == *vpp) 1084 vrele(ndp->ni_dvp); 1085 else 1086 vput(ndp->ni_dvp); 1087 if (!error && nvap->na_size != VNOVAL) { 1088 error = nfsvno_accchk(*vpp, VWRITE, 1089 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1090 NFSACCCHK_VPISLOCKED, NULL); 1091 if (!error) { 1092 tempsize = nvap->na_size; 1093 NFSVNO_ATTRINIT(nvap); 1094 nvap->na_size = tempsize; 1095 error = VOP_SETATTR(*vpp, 1096 &nvap->na_vattr, nd->nd_cred); 1097 } 1098 } 1099 if (error) 1100 vput(*vpp); 1101 } 1102 1103 out: 1104 NFSEXITCODE(error); 1105 return (error); 1106 } 1107 1108 /* 1109 * Do a mknod vnode op. 1110 */ 1111 int 1112 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 1113 struct thread *p) 1114 { 1115 int error = 0; 1116 enum vtype vtyp; 1117 1118 vtyp = nvap->na_type; 1119 /* 1120 * Iff doesn't exist, create it. 1121 */ 1122 if (ndp->ni_vp) { 1123 vrele(ndp->ni_startdir); 1124 nfsvno_relpathbuf(ndp); 1125 vput(ndp->ni_dvp); 1126 vrele(ndp->ni_vp); 1127 error = EEXIST; 1128 goto out; 1129 } 1130 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1131 vrele(ndp->ni_startdir); 1132 nfsvno_relpathbuf(ndp); 1133 vput(ndp->ni_dvp); 1134 error = NFSERR_BADTYPE; 1135 goto out; 1136 } 1137 if (vtyp == VSOCK) { 1138 vrele(ndp->ni_startdir); 1139 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 1140 &ndp->ni_cnd, &nvap->na_vattr); 1141 vput(ndp->ni_dvp); 1142 nfsvno_relpathbuf(ndp); 1143 } else { 1144 if (nvap->na_type != VFIFO && 1145 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV))) { 1146 vrele(ndp->ni_startdir); 1147 nfsvno_relpathbuf(ndp); 1148 vput(ndp->ni_dvp); 1149 goto out; 1150 } 1151 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1152 &ndp->ni_cnd, &nvap->na_vattr); 1153 vput(ndp->ni_dvp); 1154 nfsvno_relpathbuf(ndp); 1155 vrele(ndp->ni_startdir); 1156 /* 1157 * Since VOP_MKNOD returns the ni_vp, I can't 1158 * see any reason to do the lookup. 1159 */ 1160 } 1161 1162 out: 1163 NFSEXITCODE(error); 1164 return (error); 1165 } 1166 1167 /* 1168 * Mkdir vnode op. 1169 */ 1170 int 1171 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 1172 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 1173 { 1174 int error = 0; 1175 1176 if (ndp->ni_vp != NULL) { 1177 if (ndp->ni_dvp == ndp->ni_vp) 1178 vrele(ndp->ni_dvp); 1179 else 1180 vput(ndp->ni_dvp); 1181 vrele(ndp->ni_vp); 1182 nfsvno_relpathbuf(ndp); 1183 error = EEXIST; 1184 goto out; 1185 } 1186 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1187 &nvap->na_vattr); 1188 vput(ndp->ni_dvp); 1189 nfsvno_relpathbuf(ndp); 1190 1191 out: 1192 NFSEXITCODE(error); 1193 return (error); 1194 } 1195 1196 /* 1197 * symlink vnode op. 1198 */ 1199 int 1200 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 1201 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 1202 struct nfsexstuff *exp) 1203 { 1204 int error = 0; 1205 1206 if (ndp->ni_vp) { 1207 vrele(ndp->ni_startdir); 1208 nfsvno_relpathbuf(ndp); 1209 if (ndp->ni_dvp == ndp->ni_vp) 1210 vrele(ndp->ni_dvp); 1211 else 1212 vput(ndp->ni_dvp); 1213 vrele(ndp->ni_vp); 1214 error = EEXIST; 1215 goto out; 1216 } 1217 1218 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1219 &nvap->na_vattr, pathcp); 1220 vput(ndp->ni_dvp); 1221 vrele(ndp->ni_startdir); 1222 nfsvno_relpathbuf(ndp); 1223 /* 1224 * Although FreeBSD still had the lookup code in 1225 * it for 7/current, there doesn't seem to be any 1226 * point, since VOP_SYMLINK() returns the ni_vp. 1227 * Just vput it for v2. 1228 */ 1229 if (!not_v2 && !error) 1230 vput(ndp->ni_vp); 1231 1232 out: 1233 NFSEXITCODE(error); 1234 return (error); 1235 } 1236 1237 /* 1238 * Parse symbolic link arguments. 1239 * This function has an ugly side effect. It will malloc() an area for 1240 * the symlink and set iov_base to point to it, only if it succeeds. 1241 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1242 * be FREE'd later. 1243 */ 1244 int 1245 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1246 struct thread *p, char **pathcpp, int *lenp) 1247 { 1248 u_int32_t *tl; 1249 char *pathcp = NULL; 1250 int error = 0, len; 1251 struct nfsv2_sattr *sp; 1252 1253 *pathcpp = NULL; 1254 *lenp = 0; 1255 if ((nd->nd_flag & ND_NFSV3) && 1256 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1257 goto nfsmout; 1258 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1259 len = fxdr_unsigned(int, *tl); 1260 if (len > NFS_MAXPATHLEN || len <= 0) { 1261 error = EBADRPC; 1262 goto nfsmout; 1263 } 1264 pathcp = malloc(len + 1, M_TEMP, M_WAITOK); 1265 error = nfsrv_mtostr(nd, pathcp, len); 1266 if (error) 1267 goto nfsmout; 1268 if (nd->nd_flag & ND_NFSV2) { 1269 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1270 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1271 } 1272 *pathcpp = pathcp; 1273 *lenp = len; 1274 NFSEXITCODE2(0, nd); 1275 return (0); 1276 nfsmout: 1277 if (pathcp) 1278 free(pathcp, M_TEMP); 1279 NFSEXITCODE2(error, nd); 1280 return (error); 1281 } 1282 1283 /* 1284 * Remove a non-directory object. 1285 */ 1286 int 1287 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1288 struct thread *p, struct nfsexstuff *exp) 1289 { 1290 struct vnode *vp, *dsdvp[NFSDEV_MAXMIRRORS]; 1291 int error = 0, mirrorcnt; 1292 char fname[PNFS_FILENAME_LEN + 1]; 1293 fhandle_t fh; 1294 1295 vp = ndp->ni_vp; 1296 dsdvp[0] = NULL; 1297 if (vp->v_type == VDIR) 1298 error = NFSERR_ISDIR; 1299 else if (is_v4) 1300 error = nfsrv_checkremove(vp, 1, NULL, (nfsquad_t)((u_quad_t)0), 1301 p); 1302 if (error == 0) 1303 nfsrv_pnfsremovesetup(vp, p, dsdvp, &mirrorcnt, fname, &fh); 1304 if (!error) 1305 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1306 if (error == 0 && dsdvp[0] != NULL) 1307 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1308 if (ndp->ni_dvp == vp) 1309 vrele(ndp->ni_dvp); 1310 else 1311 vput(ndp->ni_dvp); 1312 vput(vp); 1313 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1314 nfsvno_relpathbuf(ndp); 1315 NFSEXITCODE(error); 1316 return (error); 1317 } 1318 1319 /* 1320 * Remove a directory. 1321 */ 1322 int 1323 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1324 struct thread *p, struct nfsexstuff *exp) 1325 { 1326 struct vnode *vp; 1327 int error = 0; 1328 1329 vp = ndp->ni_vp; 1330 if (vp->v_type != VDIR) { 1331 error = ENOTDIR; 1332 goto out; 1333 } 1334 /* 1335 * No rmdir "." please. 1336 */ 1337 if (ndp->ni_dvp == vp) { 1338 error = EINVAL; 1339 goto out; 1340 } 1341 /* 1342 * The root of a mounted filesystem cannot be deleted. 1343 */ 1344 if (vp->v_vflag & VV_ROOT) 1345 error = EBUSY; 1346 out: 1347 if (!error) 1348 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1349 if (ndp->ni_dvp == vp) 1350 vrele(ndp->ni_dvp); 1351 else 1352 vput(ndp->ni_dvp); 1353 vput(vp); 1354 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1355 nfsvno_relpathbuf(ndp); 1356 NFSEXITCODE(error); 1357 return (error); 1358 } 1359 1360 /* 1361 * Rename vnode op. 1362 */ 1363 int 1364 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1365 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1366 { 1367 struct vnode *fvp, *tvp, *tdvp, *dsdvp[NFSDEV_MAXMIRRORS]; 1368 int error = 0, mirrorcnt; 1369 char fname[PNFS_FILENAME_LEN + 1]; 1370 fhandle_t fh; 1371 1372 dsdvp[0] = NULL; 1373 fvp = fromndp->ni_vp; 1374 if (ndstat) { 1375 vrele(fromndp->ni_dvp); 1376 vrele(fvp); 1377 error = ndstat; 1378 goto out1; 1379 } 1380 tdvp = tondp->ni_dvp; 1381 tvp = tondp->ni_vp; 1382 if (tvp != NULL) { 1383 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1384 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1385 goto out; 1386 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1387 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1388 goto out; 1389 } 1390 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1391 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1392 goto out; 1393 } 1394 1395 /* 1396 * A rename to '.' or '..' results in a prematurely 1397 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1398 * here. 1399 */ 1400 if ((tondp->ni_cnd.cn_namelen == 1 && 1401 tondp->ni_cnd.cn_nameptr[0] == '.') || 1402 (tondp->ni_cnd.cn_namelen == 2 && 1403 tondp->ni_cnd.cn_nameptr[0] == '.' && 1404 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1405 error = EINVAL; 1406 goto out; 1407 } 1408 } 1409 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1410 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1411 goto out; 1412 } 1413 if (fvp->v_mount != tdvp->v_mount) { 1414 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1415 goto out; 1416 } 1417 if (fvp == tdvp) { 1418 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1419 goto out; 1420 } 1421 if (fvp == tvp) { 1422 /* 1423 * If source and destination are the same, there is nothing to 1424 * do. Set error to -1 to indicate this. 1425 */ 1426 error = -1; 1427 goto out; 1428 } 1429 if (ndflag & ND_NFSV4) { 1430 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1431 error = nfsrv_checkremove(fvp, 0, NULL, 1432 (nfsquad_t)((u_quad_t)0), p); 1433 NFSVOPUNLOCK(fvp); 1434 } else 1435 error = EPERM; 1436 if (tvp && !error) 1437 error = nfsrv_checkremove(tvp, 1, NULL, 1438 (nfsquad_t)((u_quad_t)0), p); 1439 } else { 1440 /* 1441 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1442 * that the NFSv4 client won't be confused by the rename. 1443 * Since nfsd_recalldelegation() can only be called on an 1444 * unlocked vnode at this point and fvp is the file that will 1445 * still exist after the rename, just do fvp. 1446 */ 1447 nfsd_recalldelegation(fvp, p); 1448 } 1449 if (error == 0 && tvp != NULL) { 1450 nfsrv_pnfsremovesetup(tvp, p, dsdvp, &mirrorcnt, fname, &fh); 1451 NFSD_DEBUG(4, "nfsvno_rename: pnfsremovesetup" 1452 " dsdvp=%p\n", dsdvp[0]); 1453 } 1454 out: 1455 if (!error) { 1456 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1457 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1458 &tondp->ni_cnd); 1459 } else { 1460 if (tdvp == tvp) 1461 vrele(tdvp); 1462 else 1463 vput(tdvp); 1464 if (tvp) 1465 vput(tvp); 1466 vrele(fromndp->ni_dvp); 1467 vrele(fvp); 1468 if (error == -1) 1469 error = 0; 1470 } 1471 1472 /* 1473 * If dsdvp[0] != NULL, it was set up by nfsrv_pnfsremovesetup() and 1474 * if the rename succeeded, the DS file for the tvp needs to be 1475 * removed. 1476 */ 1477 if (error == 0 && dsdvp[0] != NULL) { 1478 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1479 NFSD_DEBUG(4, "nfsvno_rename: pnfsremove\n"); 1480 } 1481 1482 vrele(tondp->ni_startdir); 1483 nfsvno_relpathbuf(tondp); 1484 out1: 1485 vrele(fromndp->ni_startdir); 1486 nfsvno_relpathbuf(fromndp); 1487 NFSEXITCODE(error); 1488 return (error); 1489 } 1490 1491 /* 1492 * Link vnode op. 1493 */ 1494 int 1495 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1496 struct thread *p, struct nfsexstuff *exp) 1497 { 1498 struct vnode *xp; 1499 int error = 0; 1500 1501 xp = ndp->ni_vp; 1502 if (xp != NULL) { 1503 error = EEXIST; 1504 } else { 1505 xp = ndp->ni_dvp; 1506 if (vp->v_mount != xp->v_mount) 1507 error = EXDEV; 1508 } 1509 if (!error) { 1510 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1511 if (!VN_IS_DOOMED(vp)) 1512 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1513 else 1514 error = EPERM; 1515 if (ndp->ni_dvp == vp) 1516 vrele(ndp->ni_dvp); 1517 else 1518 vput(ndp->ni_dvp); 1519 NFSVOPUNLOCK(vp); 1520 } else { 1521 if (ndp->ni_dvp == ndp->ni_vp) 1522 vrele(ndp->ni_dvp); 1523 else 1524 vput(ndp->ni_dvp); 1525 if (ndp->ni_vp) 1526 vrele(ndp->ni_vp); 1527 } 1528 nfsvno_relpathbuf(ndp); 1529 NFSEXITCODE(error); 1530 return (error); 1531 } 1532 1533 /* 1534 * Do the fsync() appropriate for the commit. 1535 */ 1536 int 1537 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1538 struct thread *td) 1539 { 1540 int error = 0; 1541 1542 /* 1543 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1544 * file is done. At this time VOP_FSYNC does not accept offset and 1545 * byte count parameters so call VOP_FSYNC the whole file for now. 1546 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1547 * File systems that do not use the buffer cache (as indicated 1548 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1549 */ 1550 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1551 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1552 /* 1553 * Give up and do the whole thing 1554 */ 1555 if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { 1556 VM_OBJECT_WLOCK(vp->v_object); 1557 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1558 VM_OBJECT_WUNLOCK(vp->v_object); 1559 } 1560 error = VOP_FSYNC(vp, MNT_WAIT, td); 1561 } else { 1562 /* 1563 * Locate and synchronously write any buffers that fall 1564 * into the requested range. Note: we are assuming that 1565 * f_iosize is a power of 2. 1566 */ 1567 int iosize = vp->v_mount->mnt_stat.f_iosize; 1568 int iomask = iosize - 1; 1569 struct bufobj *bo; 1570 daddr_t lblkno; 1571 1572 /* 1573 * Align to iosize boundary, super-align to page boundary. 1574 */ 1575 if (off & iomask) { 1576 cnt += off & iomask; 1577 off &= ~(u_quad_t)iomask; 1578 } 1579 if (off & PAGE_MASK) { 1580 cnt += off & PAGE_MASK; 1581 off &= ~(u_quad_t)PAGE_MASK; 1582 } 1583 lblkno = off / iosize; 1584 1585 if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { 1586 VM_OBJECT_WLOCK(vp->v_object); 1587 vm_object_page_clean(vp->v_object, off, off + cnt, 1588 OBJPC_SYNC); 1589 VM_OBJECT_WUNLOCK(vp->v_object); 1590 } 1591 1592 bo = &vp->v_bufobj; 1593 BO_LOCK(bo); 1594 while (cnt > 0) { 1595 struct buf *bp; 1596 1597 /* 1598 * If we have a buffer and it is marked B_DELWRI we 1599 * have to lock and write it. Otherwise the prior 1600 * write is assumed to have already been committed. 1601 * 1602 * gbincore() can return invalid buffers now so we 1603 * have to check that bit as well (though B_DELWRI 1604 * should not be set if B_INVAL is set there could be 1605 * a race here since we haven't locked the buffer). 1606 */ 1607 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1608 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1609 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1610 BO_LOCK(bo); 1611 continue; /* retry */ 1612 } 1613 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1614 B_DELWRI) { 1615 bremfree(bp); 1616 bp->b_flags &= ~B_ASYNC; 1617 bwrite(bp); 1618 ++nfs_commit_miss; 1619 } else 1620 BUF_UNLOCK(bp); 1621 BO_LOCK(bo); 1622 } 1623 ++nfs_commit_blks; 1624 if (cnt < iosize) 1625 break; 1626 cnt -= iosize; 1627 ++lblkno; 1628 } 1629 BO_UNLOCK(bo); 1630 } 1631 NFSEXITCODE(error); 1632 return (error); 1633 } 1634 1635 /* 1636 * Statfs vnode op. 1637 */ 1638 int 1639 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1640 { 1641 struct statfs *tsf; 1642 int error; 1643 1644 tsf = NULL; 1645 if (nfsrv_devidcnt > 0) { 1646 /* For a pNFS service, get the DS numbers. */ 1647 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK | M_ZERO); 1648 error = nfsrv_pnfsstatfs(tsf, vp->v_mount); 1649 if (error != 0) { 1650 free(tsf, M_TEMP); 1651 tsf = NULL; 1652 } 1653 } 1654 error = VFS_STATFS(vp->v_mount, sf); 1655 if (error == 0) { 1656 if (tsf != NULL) { 1657 sf->f_blocks = tsf->f_blocks; 1658 sf->f_bavail = tsf->f_bavail; 1659 sf->f_bfree = tsf->f_bfree; 1660 sf->f_bsize = tsf->f_bsize; 1661 } 1662 /* 1663 * Since NFS handles these values as unsigned on the 1664 * wire, there is no way to represent negative values, 1665 * so set them to 0. Without this, they will appear 1666 * to be very large positive values for clients like 1667 * Solaris10. 1668 */ 1669 if (sf->f_bavail < 0) 1670 sf->f_bavail = 0; 1671 if (sf->f_ffree < 0) 1672 sf->f_ffree = 0; 1673 } 1674 free(tsf, M_TEMP); 1675 NFSEXITCODE(error); 1676 return (error); 1677 } 1678 1679 /* 1680 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1681 * must handle nfsrv_opencheck() calls after any other access checks. 1682 */ 1683 void 1684 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1685 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1686 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1687 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, 1688 struct nfsexstuff *exp, struct vnode **vpp) 1689 { 1690 struct vnode *vp = NULL; 1691 u_quad_t tempsize; 1692 struct nfsexstuff nes; 1693 struct thread *p = curthread; 1694 1695 if (ndp->ni_vp == NULL) 1696 nd->nd_repstat = nfsrv_opencheck(clientid, 1697 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1698 if (!nd->nd_repstat) { 1699 if (ndp->ni_vp == NULL) { 1700 vrele(ndp->ni_startdir); 1701 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1702 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1703 /* For a pNFS server, create the data file on a DS. */ 1704 if (nd->nd_repstat == 0) { 1705 /* 1706 * Create a data file on a DS for a pNFS server. 1707 * This function just returns if not 1708 * running a pNFS DS or the creation fails. 1709 */ 1710 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1711 cred, p); 1712 } 1713 vput(ndp->ni_dvp); 1714 nfsvno_relpathbuf(ndp); 1715 if (!nd->nd_repstat) { 1716 if (*exclusive_flagp) { 1717 *exclusive_flagp = 0; 1718 NFSVNO_ATTRINIT(nvap); 1719 nvap->na_atime.tv_sec = cverf[0]; 1720 nvap->na_atime.tv_nsec = cverf[1]; 1721 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1722 &nvap->na_vattr, cred); 1723 if (nd->nd_repstat != 0) { 1724 vput(ndp->ni_vp); 1725 ndp->ni_vp = NULL; 1726 nd->nd_repstat = NFSERR_NOTSUPP; 1727 } else 1728 NFSSETBIT_ATTRBIT(attrbitp, 1729 NFSATTRBIT_TIMEACCESS); 1730 } else { 1731 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1732 aclp, p, attrbitp, exp); 1733 } 1734 } 1735 vp = ndp->ni_vp; 1736 } else { 1737 if (ndp->ni_startdir) 1738 vrele(ndp->ni_startdir); 1739 nfsvno_relpathbuf(ndp); 1740 vp = ndp->ni_vp; 1741 if (create == NFSV4OPEN_CREATE) { 1742 if (ndp->ni_dvp == vp) 1743 vrele(ndp->ni_dvp); 1744 else 1745 vput(ndp->ni_dvp); 1746 } 1747 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1748 if (ndp->ni_cnd.cn_flags & RDONLY) 1749 NFSVNO_SETEXRDONLY(&nes); 1750 else 1751 NFSVNO_EXINIT(&nes); 1752 nd->nd_repstat = nfsvno_accchk(vp, 1753 VWRITE, cred, &nes, p, 1754 NFSACCCHK_NOOVERRIDE, 1755 NFSACCCHK_VPISLOCKED, NULL); 1756 nd->nd_repstat = nfsrv_opencheck(clientid, 1757 stateidp, stp, vp, nd, p, nd->nd_repstat); 1758 if (!nd->nd_repstat) { 1759 tempsize = nvap->na_size; 1760 NFSVNO_ATTRINIT(nvap); 1761 nvap->na_size = tempsize; 1762 nd->nd_repstat = VOP_SETATTR(vp, 1763 &nvap->na_vattr, cred); 1764 } 1765 } else if (vp->v_type == VREG) { 1766 nd->nd_repstat = nfsrv_opencheck(clientid, 1767 stateidp, stp, vp, nd, p, nd->nd_repstat); 1768 } 1769 } 1770 } else { 1771 if (ndp->ni_cnd.cn_flags & HASBUF) 1772 nfsvno_relpathbuf(ndp); 1773 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1774 vrele(ndp->ni_startdir); 1775 if (ndp->ni_dvp == ndp->ni_vp) 1776 vrele(ndp->ni_dvp); 1777 else 1778 vput(ndp->ni_dvp); 1779 if (ndp->ni_vp) 1780 vput(ndp->ni_vp); 1781 } 1782 } 1783 *vpp = vp; 1784 1785 NFSEXITCODE2(0, nd); 1786 } 1787 1788 /* 1789 * Updates the file rev and sets the mtime and ctime 1790 * to the current clock time, returning the va_filerev and va_Xtime 1791 * values. 1792 * Return ESTALE to indicate the vnode is VIRF_DOOMED. 1793 */ 1794 int 1795 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1796 struct nfsrv_descript *nd, struct thread *p) 1797 { 1798 struct vattr va; 1799 1800 VATTR_NULL(&va); 1801 vfs_timestamp(&va.va_mtime); 1802 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1803 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1804 if (VN_IS_DOOMED(vp)) 1805 return (ESTALE); 1806 } 1807 (void) VOP_SETATTR(vp, &va, nd->nd_cred); 1808 (void) nfsvno_getattr(vp, nvap, nd, p, 1, NULL); 1809 return (0); 1810 } 1811 1812 /* 1813 * Glue routine to nfsv4_fillattr(). 1814 */ 1815 int 1816 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1817 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1818 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1819 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1820 { 1821 struct statfs *sf; 1822 int error; 1823 1824 sf = NULL; 1825 if (nfsrv_devidcnt > 0 && 1826 (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEAVAIL) || 1827 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEFREE) || 1828 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACETOTAL))) { 1829 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK | M_ZERO); 1830 error = nfsrv_pnfsstatfs(sf, mp); 1831 if (error != 0) { 1832 free(sf, M_TEMP); 1833 sf = NULL; 1834 } 1835 } 1836 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1837 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1838 mounted_on_fileno, sf); 1839 free(sf, M_TEMP); 1840 NFSEXITCODE2(0, nd); 1841 return (error); 1842 } 1843 1844 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1845 /* 1846 * nfs readdir service 1847 * - mallocs what it thinks is enough to read 1848 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1849 * - calls VOP_READDIR() 1850 * - loops around building the reply 1851 * if the output generated exceeds count break out of loop 1852 * The NFSM_CLGET macro is used here so that the reply will be packed 1853 * tightly in mbuf clusters. 1854 * - it trims out records with d_fileno == 0 1855 * this doesn't matter for Unix clients, but they might confuse clients 1856 * for other os'. 1857 * - it trims out records with d_type == DT_WHT 1858 * these cannot be seen through NFS (unless we extend the protocol) 1859 * The alternate call nfsrvd_readdirplus() does lookups as well. 1860 * PS: The NFS protocol spec. does not clarify what the "count" byte 1861 * argument is a count of.. just name strings and file id's or the 1862 * entire reply rpc or ... 1863 * I tried just file name and id sizes and it confused the Sun client, 1864 * so I am using the full rpc size now. The "paranoia.." comment refers 1865 * to including the status longwords that are not a part of the dir. 1866 * "entry" structures, but are in the rpc. 1867 */ 1868 int 1869 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 1870 struct vnode *vp, struct nfsexstuff *exp) 1871 { 1872 struct dirent *dp; 1873 u_int32_t *tl; 1874 int dirlen; 1875 char *cpos, *cend, *rbuf; 1876 struct nfsvattr at; 1877 int nlen, error = 0, getret = 1; 1878 int siz, cnt, fullsiz, eofflag, ncookies; 1879 u_int64_t off, toff, verf __unused; 1880 u_long *cookies = NULL, *cookiep; 1881 struct uio io; 1882 struct iovec iv; 1883 int is_ufs; 1884 struct thread *p = curthread; 1885 1886 if (nd->nd_repstat) { 1887 nfsrv_postopattr(nd, getret, &at); 1888 goto out; 1889 } 1890 if (nd->nd_flag & ND_NFSV2) { 1891 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1892 off = fxdr_unsigned(u_quad_t, *tl++); 1893 } else { 1894 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1895 off = fxdr_hyper(tl); 1896 tl += 2; 1897 verf = fxdr_hyper(tl); 1898 tl += 2; 1899 } 1900 toff = off; 1901 cnt = fxdr_unsigned(int, *tl); 1902 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 1903 cnt = NFS_SRVMAXDATA(nd); 1904 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 1905 fullsiz = siz; 1906 if (nd->nd_flag & ND_NFSV3) { 1907 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, 1908 NULL); 1909 #if 0 1910 /* 1911 * va_filerev is not sufficient as a cookie verifier, 1912 * since it is not supposed to change when entries are 1913 * removed/added unless that offset cookies returned to 1914 * the client are no longer valid. 1915 */ 1916 if (!nd->nd_repstat && toff && verf != at.na_filerev) 1917 nd->nd_repstat = NFSERR_BAD_COOKIE; 1918 #endif 1919 } 1920 if (!nd->nd_repstat && vp->v_type != VDIR) 1921 nd->nd_repstat = NFSERR_NOTDIR; 1922 if (nd->nd_repstat == 0 && cnt == 0) { 1923 if (nd->nd_flag & ND_NFSV2) 1924 /* NFSv2 does not have NFSERR_TOOSMALL */ 1925 nd->nd_repstat = EPERM; 1926 else 1927 nd->nd_repstat = NFSERR_TOOSMALL; 1928 } 1929 if (!nd->nd_repstat) 1930 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 1931 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1932 NFSACCCHK_VPISLOCKED, NULL); 1933 if (nd->nd_repstat) { 1934 vput(vp); 1935 if (nd->nd_flag & ND_NFSV3) 1936 nfsrv_postopattr(nd, getret, &at); 1937 goto out; 1938 } 1939 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 1940 rbuf = malloc(siz, M_TEMP, M_WAITOK); 1941 again: 1942 eofflag = 0; 1943 if (cookies) { 1944 free(cookies, M_TEMP); 1945 cookies = NULL; 1946 } 1947 1948 iv.iov_base = rbuf; 1949 iv.iov_len = siz; 1950 io.uio_iov = &iv; 1951 io.uio_iovcnt = 1; 1952 io.uio_offset = (off_t)off; 1953 io.uio_resid = siz; 1954 io.uio_segflg = UIO_SYSSPACE; 1955 io.uio_rw = UIO_READ; 1956 io.uio_td = NULL; 1957 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 1958 &cookies); 1959 off = (u_int64_t)io.uio_offset; 1960 if (io.uio_resid) 1961 siz -= io.uio_resid; 1962 1963 if (!cookies && !nd->nd_repstat) 1964 nd->nd_repstat = NFSERR_PERM; 1965 if (nd->nd_flag & ND_NFSV3) { 1966 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 1967 if (!nd->nd_repstat) 1968 nd->nd_repstat = getret; 1969 } 1970 1971 /* 1972 * Handles the failed cases. nd->nd_repstat == 0 past here. 1973 */ 1974 if (nd->nd_repstat) { 1975 vput(vp); 1976 free(rbuf, M_TEMP); 1977 if (cookies) 1978 free(cookies, M_TEMP); 1979 if (nd->nd_flag & ND_NFSV3) 1980 nfsrv_postopattr(nd, getret, &at); 1981 goto out; 1982 } 1983 /* 1984 * If nothing read, return eof 1985 * rpc reply 1986 */ 1987 if (siz == 0) { 1988 vput(vp); 1989 if (nd->nd_flag & ND_NFSV2) { 1990 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1991 } else { 1992 nfsrv_postopattr(nd, getret, &at); 1993 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1994 txdr_hyper(at.na_filerev, tl); 1995 tl += 2; 1996 } 1997 *tl++ = newnfs_false; 1998 *tl = newnfs_true; 1999 free(rbuf, M_TEMP); 2000 free(cookies, M_TEMP); 2001 goto out; 2002 } 2003 2004 /* 2005 * Check for degenerate cases of nothing useful read. 2006 * If so go try again 2007 */ 2008 cpos = rbuf; 2009 cend = rbuf + siz; 2010 dp = (struct dirent *)cpos; 2011 cookiep = cookies; 2012 2013 /* 2014 * For some reason FreeBSD's ufs_readdir() chooses to back the 2015 * directory offset up to a block boundary, so it is necessary to 2016 * skip over the records that precede the requested offset. This 2017 * requires the assumption that file offset cookies monotonically 2018 * increase. 2019 */ 2020 while (cpos < cend && ncookies > 0 && 2021 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2022 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 2023 cpos += dp->d_reclen; 2024 dp = (struct dirent *)cpos; 2025 cookiep++; 2026 ncookies--; 2027 } 2028 if (cpos >= cend || ncookies == 0) { 2029 siz = fullsiz; 2030 toff = off; 2031 goto again; 2032 } 2033 vput(vp); 2034 2035 /* 2036 * dirlen is the size of the reply, including all XDR and must 2037 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 2038 * if the XDR should be included in "count", but to be safe, we do. 2039 * (Include the two booleans at the end of the reply in dirlen now.) 2040 */ 2041 if (nd->nd_flag & ND_NFSV3) { 2042 nfsrv_postopattr(nd, getret, &at); 2043 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2044 txdr_hyper(at.na_filerev, tl); 2045 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2046 } else { 2047 dirlen = 2 * NFSX_UNSIGNED; 2048 } 2049 2050 /* Loop through the records and build reply */ 2051 while (cpos < cend && ncookies > 0) { 2052 nlen = dp->d_namlen; 2053 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2054 nlen <= NFS_MAXNAMLEN) { 2055 if (nd->nd_flag & ND_NFSV3) 2056 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2057 else 2058 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2059 if (dirlen > cnt) { 2060 eofflag = 0; 2061 break; 2062 } 2063 2064 /* 2065 * Build the directory record xdr from 2066 * the dirent entry. 2067 */ 2068 if (nd->nd_flag & ND_NFSV3) { 2069 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2070 *tl++ = newnfs_true; 2071 *tl++ = 0; 2072 } else { 2073 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2074 *tl++ = newnfs_true; 2075 } 2076 *tl = txdr_unsigned(dp->d_fileno); 2077 (void) nfsm_strtom(nd, dp->d_name, nlen); 2078 if (nd->nd_flag & ND_NFSV3) { 2079 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2080 *tl++ = 0; 2081 } else 2082 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 2083 *tl = txdr_unsigned(*cookiep); 2084 } 2085 cpos += dp->d_reclen; 2086 dp = (struct dirent *)cpos; 2087 cookiep++; 2088 ncookies--; 2089 } 2090 if (cpos < cend) 2091 eofflag = 0; 2092 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2093 *tl++ = newnfs_false; 2094 if (eofflag) 2095 *tl = newnfs_true; 2096 else 2097 *tl = newnfs_false; 2098 free(rbuf, M_TEMP); 2099 free(cookies, M_TEMP); 2100 2101 out: 2102 NFSEXITCODE2(0, nd); 2103 return (0); 2104 nfsmout: 2105 vput(vp); 2106 NFSEXITCODE2(error, nd); 2107 return (error); 2108 } 2109 2110 /* 2111 * Readdirplus for V3 and Readdir for V4. 2112 */ 2113 int 2114 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 2115 struct vnode *vp, struct nfsexstuff *exp) 2116 { 2117 struct dirent *dp; 2118 u_int32_t *tl; 2119 int dirlen; 2120 char *cpos, *cend, *rbuf; 2121 struct vnode *nvp; 2122 fhandle_t nfh; 2123 struct nfsvattr nva, at, *nvap = &nva; 2124 struct mbuf *mb0, *mb1; 2125 struct nfsreferral *refp; 2126 int nlen, r, error = 0, getret = 1, usevget = 1; 2127 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 2128 caddr_t bpos0, bpos1; 2129 u_int64_t off, toff, verf; 2130 u_long *cookies = NULL, *cookiep; 2131 nfsattrbit_t attrbits, rderrbits, savbits; 2132 struct uio io; 2133 struct iovec iv; 2134 struct componentname cn; 2135 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 2136 struct mount *mp, *new_mp; 2137 uint64_t mounted_on_fileno; 2138 struct thread *p = curthread; 2139 2140 if (nd->nd_repstat) { 2141 nfsrv_postopattr(nd, getret, &at); 2142 goto out; 2143 } 2144 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2145 off = fxdr_hyper(tl); 2146 toff = off; 2147 tl += 2; 2148 verf = fxdr_hyper(tl); 2149 tl += 2; 2150 siz = fxdr_unsigned(int, *tl++); 2151 cnt = fxdr_unsigned(int, *tl); 2152 2153 /* 2154 * Use the server's maximum data transfer size as the upper bound 2155 * on reply datalen. 2156 */ 2157 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2158 cnt = NFS_SRVMAXDATA(nd); 2159 2160 /* 2161 * siz is a "hint" of how much directory information (name, fileid, 2162 * cookie) should be in the reply. At least one client "hints" 0, 2163 * so I set it to cnt for that case. I also round it up to the 2164 * next multiple of DIRBLKSIZ. 2165 * Since the size of a Readdirplus directory entry reply will always 2166 * be greater than a directory entry returned by VOP_READDIR(), it 2167 * does not make sense to read more than NFS_SRVMAXDATA() via 2168 * VOP_READDIR(). 2169 */ 2170 if (siz <= 0) 2171 siz = cnt; 2172 else if (siz > NFS_SRVMAXDATA(nd)) 2173 siz = NFS_SRVMAXDATA(nd); 2174 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2175 2176 if (nd->nd_flag & ND_NFSV4) { 2177 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 2178 if (error) 2179 goto nfsmout; 2180 NFSSET_ATTRBIT(&savbits, &attrbits); 2181 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits, nd); 2182 NFSZERO_ATTRBIT(&rderrbits); 2183 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 2184 } else { 2185 NFSZERO_ATTRBIT(&attrbits); 2186 } 2187 fullsiz = siz; 2188 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2189 #if 0 2190 if (!nd->nd_repstat) { 2191 if (off && verf != at.na_filerev) { 2192 /* 2193 * va_filerev is not sufficient as a cookie verifier, 2194 * since it is not supposed to change when entries are 2195 * removed/added unless that offset cookies returned to 2196 * the client are no longer valid. 2197 */ 2198 if (nd->nd_flag & ND_NFSV4) { 2199 nd->nd_repstat = NFSERR_NOTSAME; 2200 } else { 2201 nd->nd_repstat = NFSERR_BAD_COOKIE; 2202 } 2203 } 2204 } 2205 #endif 2206 if (!nd->nd_repstat && vp->v_type != VDIR) 2207 nd->nd_repstat = NFSERR_NOTDIR; 2208 if (!nd->nd_repstat && cnt == 0) 2209 nd->nd_repstat = NFSERR_TOOSMALL; 2210 if (!nd->nd_repstat) 2211 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2212 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2213 NFSACCCHK_VPISLOCKED, NULL); 2214 if (nd->nd_repstat) { 2215 vput(vp); 2216 if (nd->nd_flag & ND_NFSV3) 2217 nfsrv_postopattr(nd, getret, &at); 2218 goto out; 2219 } 2220 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2221 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 2222 2223 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2224 again: 2225 eofflag = 0; 2226 if (cookies) { 2227 free(cookies, M_TEMP); 2228 cookies = NULL; 2229 } 2230 2231 iv.iov_base = rbuf; 2232 iv.iov_len = siz; 2233 io.uio_iov = &iv; 2234 io.uio_iovcnt = 1; 2235 io.uio_offset = (off_t)off; 2236 io.uio_resid = siz; 2237 io.uio_segflg = UIO_SYSSPACE; 2238 io.uio_rw = UIO_READ; 2239 io.uio_td = NULL; 2240 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2241 &cookies); 2242 off = (u_int64_t)io.uio_offset; 2243 if (io.uio_resid) 2244 siz -= io.uio_resid; 2245 2246 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2247 2248 if (!cookies && !nd->nd_repstat) 2249 nd->nd_repstat = NFSERR_PERM; 2250 if (!nd->nd_repstat) 2251 nd->nd_repstat = getret; 2252 if (nd->nd_repstat) { 2253 vput(vp); 2254 if (cookies) 2255 free(cookies, M_TEMP); 2256 free(rbuf, M_TEMP); 2257 if (nd->nd_flag & ND_NFSV3) 2258 nfsrv_postopattr(nd, getret, &at); 2259 goto out; 2260 } 2261 /* 2262 * If nothing read, return eof 2263 * rpc reply 2264 */ 2265 if (siz == 0) { 2266 vput(vp); 2267 if (nd->nd_flag & ND_NFSV3) 2268 nfsrv_postopattr(nd, getret, &at); 2269 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2270 txdr_hyper(at.na_filerev, tl); 2271 tl += 2; 2272 *tl++ = newnfs_false; 2273 *tl = newnfs_true; 2274 free(cookies, M_TEMP); 2275 free(rbuf, M_TEMP); 2276 goto out; 2277 } 2278 2279 /* 2280 * Check for degenerate cases of nothing useful read. 2281 * If so go try again 2282 */ 2283 cpos = rbuf; 2284 cend = rbuf + siz; 2285 dp = (struct dirent *)cpos; 2286 cookiep = cookies; 2287 2288 /* 2289 * For some reason FreeBSD's ufs_readdir() chooses to back the 2290 * directory offset up to a block boundary, so it is necessary to 2291 * skip over the records that precede the requested offset. This 2292 * requires the assumption that file offset cookies monotonically 2293 * increase. 2294 */ 2295 while (cpos < cend && ncookies > 0 && 2296 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2297 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 2298 ((nd->nd_flag & ND_NFSV4) && 2299 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 2300 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 2301 cpos += dp->d_reclen; 2302 dp = (struct dirent *)cpos; 2303 cookiep++; 2304 ncookies--; 2305 } 2306 if (cpos >= cend || ncookies == 0) { 2307 siz = fullsiz; 2308 toff = off; 2309 goto again; 2310 } 2311 2312 /* 2313 * Busy the file system so that the mount point won't go away 2314 * and, as such, VFS_VGET() can be used safely. 2315 */ 2316 mp = vp->v_mount; 2317 vfs_ref(mp); 2318 NFSVOPUNLOCK(vp); 2319 nd->nd_repstat = vfs_busy(mp, 0); 2320 vfs_rel(mp); 2321 if (nd->nd_repstat != 0) { 2322 vrele(vp); 2323 free(cookies, M_TEMP); 2324 free(rbuf, M_TEMP); 2325 if (nd->nd_flag & ND_NFSV3) 2326 nfsrv_postopattr(nd, getret, &at); 2327 goto out; 2328 } 2329 2330 /* 2331 * Check to see if entries in this directory can be safely acquired 2332 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2333 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2334 * automount of the snapshot directory that is required will 2335 * be done. 2336 * This needs to be done here for NFSv4, since NFSv4 never does 2337 * a VFS_VGET() for "." or "..". 2338 */ 2339 if (is_zfs == 1) { 2340 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2341 if (r == EOPNOTSUPP) { 2342 usevget = 0; 2343 cn.cn_nameiop = LOOKUP; 2344 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2345 cn.cn_cred = nd->nd_cred; 2346 cn.cn_thread = p; 2347 } else if (r == 0) 2348 vput(nvp); 2349 } 2350 2351 /* 2352 * Save this position, in case there is an error before one entry 2353 * is created. 2354 */ 2355 mb0 = nd->nd_mb; 2356 bpos0 = nd->nd_bpos; 2357 2358 /* 2359 * Fill in the first part of the reply. 2360 * dirlen is the reply length in bytes and cannot exceed cnt. 2361 * (Include the two booleans at the end of the reply in dirlen now, 2362 * so we recognize when we have exceeded cnt.) 2363 */ 2364 if (nd->nd_flag & ND_NFSV3) { 2365 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2366 nfsrv_postopattr(nd, getret, &at); 2367 } else { 2368 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2369 } 2370 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2371 txdr_hyper(at.na_filerev, tl); 2372 2373 /* 2374 * Save this position, in case there is an empty reply needed. 2375 */ 2376 mb1 = nd->nd_mb; 2377 bpos1 = nd->nd_bpos; 2378 2379 /* Loop through the records and build reply */ 2380 entrycnt = 0; 2381 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2382 nlen = dp->d_namlen; 2383 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2384 nlen <= NFS_MAXNAMLEN && 2385 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2386 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2387 || (nlen == 1 && dp->d_name[0] != '.'))) { 2388 /* 2389 * Save the current position in the reply, in case 2390 * this entry exceeds cnt. 2391 */ 2392 mb1 = nd->nd_mb; 2393 bpos1 = nd->nd_bpos; 2394 2395 /* 2396 * For readdir_and_lookup get the vnode using 2397 * the file number. 2398 */ 2399 nvp = NULL; 2400 refp = NULL; 2401 r = 0; 2402 at_root = 0; 2403 needs_unbusy = 0; 2404 new_mp = mp; 2405 mounted_on_fileno = (uint64_t)dp->d_fileno; 2406 if ((nd->nd_flag & ND_NFSV3) || 2407 NFSNONZERO_ATTRBIT(&savbits)) { 2408 if (nd->nd_flag & ND_NFSV4) 2409 refp = nfsv4root_getreferral(NULL, 2410 vp, dp->d_fileno); 2411 if (refp == NULL) { 2412 if (usevget) 2413 r = VFS_VGET(mp, dp->d_fileno, 2414 LK_SHARED, &nvp); 2415 else 2416 r = EOPNOTSUPP; 2417 if (r == EOPNOTSUPP) { 2418 if (usevget) { 2419 usevget = 0; 2420 cn.cn_nameiop = LOOKUP; 2421 cn.cn_lkflags = 2422 LK_SHARED | 2423 LK_RETRY; 2424 cn.cn_cred = 2425 nd->nd_cred; 2426 cn.cn_thread = p; 2427 } 2428 cn.cn_nameptr = dp->d_name; 2429 cn.cn_namelen = nlen; 2430 cn.cn_flags = ISLASTCN | 2431 NOFOLLOW | LOCKLEAF; 2432 if (nlen == 2 && 2433 dp->d_name[0] == '.' && 2434 dp->d_name[1] == '.') 2435 cn.cn_flags |= 2436 ISDOTDOT; 2437 if (NFSVOPLOCK(vp, LK_SHARED) 2438 != 0) { 2439 nd->nd_repstat = EPERM; 2440 break; 2441 } 2442 if ((vp->v_vflag & VV_ROOT) != 0 2443 && (cn.cn_flags & ISDOTDOT) 2444 != 0) { 2445 vref(vp); 2446 nvp = vp; 2447 r = 0; 2448 } else { 2449 r = VOP_LOOKUP(vp, &nvp, 2450 &cn); 2451 if (vp != nvp) 2452 NFSVOPUNLOCK(vp); 2453 } 2454 } 2455 2456 /* 2457 * For NFSv4, check to see if nvp is 2458 * a mount point and get the mount 2459 * point vnode, as required. 2460 */ 2461 if (r == 0 && 2462 nfsrv_enable_crossmntpt != 0 && 2463 (nd->nd_flag & ND_NFSV4) != 0 && 2464 nvp->v_type == VDIR && 2465 nvp->v_mountedhere != NULL) { 2466 new_mp = nvp->v_mountedhere; 2467 r = vfs_busy(new_mp, 0); 2468 vput(nvp); 2469 nvp = NULL; 2470 if (r == 0) { 2471 r = VFS_ROOT(new_mp, 2472 LK_SHARED, &nvp); 2473 needs_unbusy = 1; 2474 if (r == 0) 2475 at_root = 1; 2476 } 2477 } 2478 } 2479 2480 /* 2481 * If we failed to look up the entry, then it 2482 * has become invalid, most likely removed. 2483 */ 2484 if (r != 0) { 2485 if (needs_unbusy) 2486 vfs_unbusy(new_mp); 2487 goto invalid; 2488 } 2489 KASSERT(refp != NULL || nvp != NULL, 2490 ("%s: undetected lookup error", __func__)); 2491 2492 if (refp == NULL && 2493 ((nd->nd_flag & ND_NFSV3) || 2494 NFSNONZERO_ATTRBIT(&attrbits))) { 2495 r = nfsvno_getfh(nvp, &nfh, p); 2496 if (!r) 2497 r = nfsvno_getattr(nvp, nvap, nd, p, 2498 1, &attrbits); 2499 if (r == 0 && is_zfs == 1 && 2500 nfsrv_enable_crossmntpt != 0 && 2501 (nd->nd_flag & ND_NFSV4) != 0 && 2502 nvp->v_type == VDIR && 2503 vp->v_mount != nvp->v_mount) { 2504 /* 2505 * For a ZFS snapshot, there is a 2506 * pseudo mount that does not set 2507 * v_mountedhere, so it needs to 2508 * be detected via a different 2509 * mount structure. 2510 */ 2511 at_root = 1; 2512 if (new_mp == mp) 2513 new_mp = nvp->v_mount; 2514 } 2515 } 2516 2517 /* 2518 * If we failed to get attributes of the entry, 2519 * then just skip it for NFSv3 (the traditional 2520 * behavior in the old NFS server). 2521 * For NFSv4 the behavior is controlled by 2522 * RDATTRERROR: we either ignore the error or 2523 * fail the request. 2524 * Note that RDATTRERROR is never set for NFSv3. 2525 */ 2526 if (r != 0) { 2527 if (!NFSISSET_ATTRBIT(&attrbits, 2528 NFSATTRBIT_RDATTRERROR)) { 2529 vput(nvp); 2530 if (needs_unbusy != 0) 2531 vfs_unbusy(new_mp); 2532 if ((nd->nd_flag & ND_NFSV3)) 2533 goto invalid; 2534 nd->nd_repstat = r; 2535 break; 2536 } 2537 } 2538 } 2539 2540 /* 2541 * Build the directory record xdr 2542 */ 2543 if (nd->nd_flag & ND_NFSV3) { 2544 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2545 *tl++ = newnfs_true; 2546 *tl++ = 0; 2547 *tl = txdr_unsigned(dp->d_fileno); 2548 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2549 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2550 *tl++ = 0; 2551 *tl = txdr_unsigned(*cookiep); 2552 nfsrv_postopattr(nd, 0, nvap); 2553 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2554 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2555 if (nvp != NULL) 2556 vput(nvp); 2557 } else { 2558 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2559 *tl++ = newnfs_true; 2560 *tl++ = 0; 2561 *tl = txdr_unsigned(*cookiep); 2562 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2563 if (nvp != NULL) { 2564 supports_nfsv4acls = 2565 nfs_supportsnfsv4acls(nvp); 2566 NFSVOPUNLOCK(nvp); 2567 } else 2568 supports_nfsv4acls = 0; 2569 if (refp != NULL) { 2570 dirlen += nfsrv_putreferralattr(nd, 2571 &savbits, refp, 0, 2572 &nd->nd_repstat); 2573 if (nd->nd_repstat) { 2574 if (nvp != NULL) 2575 vrele(nvp); 2576 if (needs_unbusy != 0) 2577 vfs_unbusy(new_mp); 2578 break; 2579 } 2580 } else if (r) { 2581 dirlen += nfsvno_fillattr(nd, new_mp, 2582 nvp, nvap, &nfh, r, &rderrbits, 2583 nd->nd_cred, p, isdgram, 0, 2584 supports_nfsv4acls, at_root, 2585 mounted_on_fileno); 2586 } else { 2587 dirlen += nfsvno_fillattr(nd, new_mp, 2588 nvp, nvap, &nfh, r, &attrbits, 2589 nd->nd_cred, p, isdgram, 0, 2590 supports_nfsv4acls, at_root, 2591 mounted_on_fileno); 2592 } 2593 if (nvp != NULL) 2594 vrele(nvp); 2595 dirlen += (3 * NFSX_UNSIGNED); 2596 } 2597 if (needs_unbusy != 0) 2598 vfs_unbusy(new_mp); 2599 if (dirlen <= cnt) 2600 entrycnt++; 2601 } 2602 invalid: 2603 cpos += dp->d_reclen; 2604 dp = (struct dirent *)cpos; 2605 cookiep++; 2606 ncookies--; 2607 } 2608 vrele(vp); 2609 vfs_unbusy(mp); 2610 2611 /* 2612 * If dirlen > cnt, we must strip off the last entry. If that 2613 * results in an empty reply, report NFSERR_TOOSMALL. 2614 */ 2615 if (dirlen > cnt || nd->nd_repstat) { 2616 if (!nd->nd_repstat && entrycnt == 0) 2617 nd->nd_repstat = NFSERR_TOOSMALL; 2618 if (nd->nd_repstat) { 2619 newnfs_trimtrailing(nd, mb0, bpos0); 2620 if (nd->nd_flag & ND_NFSV3) 2621 nfsrv_postopattr(nd, getret, &at); 2622 } else 2623 newnfs_trimtrailing(nd, mb1, bpos1); 2624 eofflag = 0; 2625 } else if (cpos < cend) 2626 eofflag = 0; 2627 if (!nd->nd_repstat) { 2628 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2629 *tl++ = newnfs_false; 2630 if (eofflag) 2631 *tl = newnfs_true; 2632 else 2633 *tl = newnfs_false; 2634 } 2635 free(cookies, M_TEMP); 2636 free(rbuf, M_TEMP); 2637 2638 out: 2639 NFSEXITCODE2(0, nd); 2640 return (0); 2641 nfsmout: 2642 vput(vp); 2643 NFSEXITCODE2(error, nd); 2644 return (error); 2645 } 2646 2647 /* 2648 * Get the settable attributes out of the mbuf list. 2649 * (Return 0 or EBADRPC) 2650 */ 2651 int 2652 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2653 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2654 { 2655 u_int32_t *tl; 2656 struct nfsv2_sattr *sp; 2657 int error = 0, toclient = 0; 2658 2659 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2660 case ND_NFSV2: 2661 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2662 /* 2663 * Some old clients didn't fill in the high order 16bits. 2664 * --> check the low order 2 bytes for 0xffff 2665 */ 2666 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2667 nvap->na_mode = nfstov_mode(sp->sa_mode); 2668 if (sp->sa_uid != newnfs_xdrneg1) 2669 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2670 if (sp->sa_gid != newnfs_xdrneg1) 2671 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2672 if (sp->sa_size != newnfs_xdrneg1) 2673 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2674 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2675 #ifdef notyet 2676 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2677 #else 2678 nvap->na_atime.tv_sec = 2679 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2680 nvap->na_atime.tv_nsec = 0; 2681 #endif 2682 } 2683 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2684 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2685 break; 2686 case ND_NFSV3: 2687 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2688 if (*tl == newnfs_true) { 2689 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2690 nvap->na_mode = nfstov_mode(*tl); 2691 } 2692 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2693 if (*tl == newnfs_true) { 2694 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2695 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2696 } 2697 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2698 if (*tl == newnfs_true) { 2699 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2700 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2701 } 2702 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2703 if (*tl == newnfs_true) { 2704 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2705 nvap->na_size = fxdr_hyper(tl); 2706 } 2707 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2708 switch (fxdr_unsigned(int, *tl)) { 2709 case NFSV3SATTRTIME_TOCLIENT: 2710 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2711 fxdr_nfsv3time(tl, &nvap->na_atime); 2712 toclient = 1; 2713 break; 2714 case NFSV3SATTRTIME_TOSERVER: 2715 vfs_timestamp(&nvap->na_atime); 2716 nvap->na_vaflags |= VA_UTIMES_NULL; 2717 break; 2718 } 2719 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2720 switch (fxdr_unsigned(int, *tl)) { 2721 case NFSV3SATTRTIME_TOCLIENT: 2722 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2723 fxdr_nfsv3time(tl, &nvap->na_mtime); 2724 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2725 break; 2726 case NFSV3SATTRTIME_TOSERVER: 2727 vfs_timestamp(&nvap->na_mtime); 2728 if (!toclient) 2729 nvap->na_vaflags |= VA_UTIMES_NULL; 2730 break; 2731 } 2732 break; 2733 case ND_NFSV4: 2734 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2735 } 2736 nfsmout: 2737 NFSEXITCODE2(error, nd); 2738 return (error); 2739 } 2740 2741 /* 2742 * Handle the setable attributes for V4. 2743 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2744 */ 2745 int 2746 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2747 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2748 { 2749 u_int32_t *tl; 2750 int attrsum = 0; 2751 int i, j; 2752 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2753 int moderet, toclient = 0; 2754 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2755 uid_t uid; 2756 gid_t gid; 2757 u_short mode, mask; /* Same type as va_mode. */ 2758 struct vattr va; 2759 2760 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2761 if (error) 2762 goto nfsmout; 2763 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2764 attrsize = fxdr_unsigned(int, *tl); 2765 2766 /* 2767 * Loop around getting the setable attributes. If an unsupported 2768 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2769 */ 2770 if (retnotsup) { 2771 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2772 bitpos = NFSATTRBIT_MAX; 2773 } else { 2774 bitpos = 0; 2775 } 2776 moderet = 0; 2777 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2778 if (attrsum > attrsize) { 2779 error = NFSERR_BADXDR; 2780 goto nfsmout; 2781 } 2782 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2783 switch (bitpos) { 2784 case NFSATTRBIT_SIZE: 2785 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2786 if (vp != NULL && vp->v_type != VREG) { 2787 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2788 NFSERR_INVAL; 2789 goto nfsmout; 2790 } 2791 nvap->na_size = fxdr_hyper(tl); 2792 attrsum += NFSX_HYPER; 2793 break; 2794 case NFSATTRBIT_ACL: 2795 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize, 2796 p); 2797 if (error) 2798 goto nfsmout; 2799 if (aceerr && !nd->nd_repstat) 2800 nd->nd_repstat = aceerr; 2801 attrsum += aclsize; 2802 break; 2803 case NFSATTRBIT_ARCHIVE: 2804 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2805 if (!nd->nd_repstat) 2806 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2807 attrsum += NFSX_UNSIGNED; 2808 break; 2809 case NFSATTRBIT_HIDDEN: 2810 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2811 if (!nd->nd_repstat) 2812 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2813 attrsum += NFSX_UNSIGNED; 2814 break; 2815 case NFSATTRBIT_MIMETYPE: 2816 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2817 i = fxdr_unsigned(int, *tl); 2818 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 2819 if (error) 2820 goto nfsmout; 2821 if (!nd->nd_repstat) 2822 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2823 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 2824 break; 2825 case NFSATTRBIT_MODE: 2826 moderet = NFSERR_INVAL; /* Can't do MODESETMASKED. */ 2827 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2828 nvap->na_mode = nfstov_mode(*tl); 2829 attrsum += NFSX_UNSIGNED; 2830 break; 2831 case NFSATTRBIT_OWNER: 2832 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2833 j = fxdr_unsigned(int, *tl); 2834 if (j < 0) { 2835 error = NFSERR_BADXDR; 2836 goto nfsmout; 2837 } 2838 if (j > NFSV4_SMALLSTR) 2839 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2840 else 2841 cp = namestr; 2842 error = nfsrv_mtostr(nd, cp, j); 2843 if (error) { 2844 if (j > NFSV4_SMALLSTR) 2845 free(cp, M_NFSSTRING); 2846 goto nfsmout; 2847 } 2848 if (!nd->nd_repstat) { 2849 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, 2850 &uid); 2851 if (!nd->nd_repstat) 2852 nvap->na_uid = uid; 2853 } 2854 if (j > NFSV4_SMALLSTR) 2855 free(cp, M_NFSSTRING); 2856 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2857 break; 2858 case NFSATTRBIT_OWNERGROUP: 2859 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2860 j = fxdr_unsigned(int, *tl); 2861 if (j < 0) { 2862 error = NFSERR_BADXDR; 2863 goto nfsmout; 2864 } 2865 if (j > NFSV4_SMALLSTR) 2866 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 2867 else 2868 cp = namestr; 2869 error = nfsrv_mtostr(nd, cp, j); 2870 if (error) { 2871 if (j > NFSV4_SMALLSTR) 2872 free(cp, M_NFSSTRING); 2873 goto nfsmout; 2874 } 2875 if (!nd->nd_repstat) { 2876 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, 2877 &gid); 2878 if (!nd->nd_repstat) 2879 nvap->na_gid = gid; 2880 } 2881 if (j > NFSV4_SMALLSTR) 2882 free(cp, M_NFSSTRING); 2883 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 2884 break; 2885 case NFSATTRBIT_SYSTEM: 2886 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2887 if (!nd->nd_repstat) 2888 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2889 attrsum += NFSX_UNSIGNED; 2890 break; 2891 case NFSATTRBIT_TIMEACCESSSET: 2892 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2893 attrsum += NFSX_UNSIGNED; 2894 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2895 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2896 fxdr_nfsv4time(tl, &nvap->na_atime); 2897 toclient = 1; 2898 attrsum += NFSX_V4TIME; 2899 } else { 2900 vfs_timestamp(&nvap->na_atime); 2901 nvap->na_vaflags |= VA_UTIMES_NULL; 2902 } 2903 break; 2904 case NFSATTRBIT_TIMEBACKUP: 2905 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2906 if (!nd->nd_repstat) 2907 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2908 attrsum += NFSX_V4TIME; 2909 break; 2910 case NFSATTRBIT_TIMECREATE: 2911 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2912 if (!nd->nd_repstat) 2913 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2914 attrsum += NFSX_V4TIME; 2915 break; 2916 case NFSATTRBIT_TIMEMODIFYSET: 2917 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2918 attrsum += NFSX_UNSIGNED; 2919 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 2920 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 2921 fxdr_nfsv4time(tl, &nvap->na_mtime); 2922 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2923 attrsum += NFSX_V4TIME; 2924 } else { 2925 vfs_timestamp(&nvap->na_mtime); 2926 if (!toclient) 2927 nvap->na_vaflags |= VA_UTIMES_NULL; 2928 } 2929 break; 2930 case NFSATTRBIT_MODESETMASKED: 2931 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 2932 mode = fxdr_unsigned(u_short, *tl++); 2933 mask = fxdr_unsigned(u_short, *tl); 2934 /* 2935 * vp == NULL implies an Open/Create operation. 2936 * This attribute can only be used for Setattr and 2937 * only for NFSv4.1 or higher. 2938 * If moderet != 0, a mode attribute has also been 2939 * specified and this attribute cannot be done in the 2940 * same Setattr operation. 2941 */ 2942 if ((nd->nd_flag & ND_NFSV41) == 0) 2943 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2944 else if ((mode & ~07777) != 0 || (mask & ~07777) != 0 || 2945 vp == NULL) 2946 nd->nd_repstat = NFSERR_INVAL; 2947 else if (moderet == 0) 2948 moderet = VOP_GETATTR(vp, &va, nd->nd_cred); 2949 if (moderet == 0) 2950 nvap->na_mode = (mode & mask) | 2951 (va.va_mode & ~mask); 2952 else 2953 nd->nd_repstat = moderet; 2954 attrsum += 2 * NFSX_UNSIGNED; 2955 break; 2956 default: 2957 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2958 /* 2959 * set bitpos so we drop out of the loop. 2960 */ 2961 bitpos = NFSATTRBIT_MAX; 2962 break; 2963 } 2964 } 2965 2966 /* 2967 * some clients pad the attrlist, so we need to skip over the 2968 * padding. 2969 */ 2970 if (attrsum > attrsize) { 2971 error = NFSERR_BADXDR; 2972 } else { 2973 attrsize = NFSM_RNDUP(attrsize); 2974 if (attrsum < attrsize) 2975 error = nfsm_advance(nd, attrsize - attrsum, -1); 2976 } 2977 nfsmout: 2978 NFSEXITCODE2(error, nd); 2979 return (error); 2980 } 2981 2982 /* 2983 * Check/setup export credentials. 2984 */ 2985 int 2986 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 2987 struct ucred *credanon) 2988 { 2989 int error = 0; 2990 2991 /* 2992 * Check/setup credentials. 2993 */ 2994 if (nd->nd_flag & ND_GSS) 2995 exp->nes_exflag &= ~MNT_EXPORTANON; 2996 2997 /* 2998 * Check to see if the operation is allowed for this security flavor. 2999 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to 3000 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 3001 * Also, allow Secinfo, so that it can acquire the correct flavor(s). 3002 */ 3003 if (nfsvno_testexp(nd, exp) && 3004 nd->nd_procnum != NFSV4OP_SECINFO && 3005 nd->nd_procnum != NFSPROC_FSINFO) { 3006 if (nd->nd_flag & ND_NFSV4) 3007 error = NFSERR_WRONGSEC; 3008 else 3009 error = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3010 goto out; 3011 } 3012 3013 /* 3014 * Check to see if the file system is exported V4 only. 3015 */ 3016 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 3017 error = NFSERR_PROGNOTV4; 3018 goto out; 3019 } 3020 3021 /* 3022 * Now, map the user credentials. 3023 * (Note that ND_AUTHNONE will only be set for an NFSv3 3024 * Fsinfo RPC. If set for anything else, this code might need 3025 * to change.) 3026 */ 3027 if (NFSVNO_EXPORTED(exp)) { 3028 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 3029 NFSVNO_EXPORTANON(exp) || 3030 (nd->nd_flag & ND_AUTHNONE) != 0) { 3031 nd->nd_cred->cr_uid = credanon->cr_uid; 3032 nd->nd_cred->cr_gid = credanon->cr_gid; 3033 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 3034 credanon->cr_groups); 3035 } else if ((nd->nd_flag & ND_GSS) == 0) { 3036 /* 3037 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 3038 * if there is a replacement credential with a group 3039 * list set up by "nfsuserd -manage-gids". 3040 * If there is no replacement, nfsrv_getgrpscred() 3041 * simply returns its argument. 3042 */ 3043 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 3044 } 3045 } 3046 3047 out: 3048 NFSEXITCODE2(error, nd); 3049 return (error); 3050 } 3051 3052 /* 3053 * Check exports. 3054 */ 3055 int 3056 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 3057 struct ucred **credp) 3058 { 3059 int i, error, *secflavors; 3060 3061 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3062 &exp->nes_numsecflavor, &secflavors); 3063 if (error) { 3064 if (nfs_rootfhset) { 3065 exp->nes_exflag = 0; 3066 exp->nes_numsecflavor = 0; 3067 error = 0; 3068 } 3069 } else if (exp->nes_numsecflavor < 1 || exp->nes_numsecflavor > 3070 MAXSECFLAVORS) { 3071 printf("nfsvno_checkexp: numsecflavors out of range\n"); 3072 exp->nes_numsecflavor = 0; 3073 error = EACCES; 3074 } else { 3075 /* Copy the security flavors. */ 3076 for (i = 0; i < exp->nes_numsecflavor; i++) 3077 exp->nes_secflavors[i] = secflavors[i]; 3078 } 3079 NFSEXITCODE(error); 3080 return (error); 3081 } 3082 3083 /* 3084 * Get a vnode for a file handle and export stuff. 3085 */ 3086 int 3087 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 3088 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 3089 struct ucred **credp) 3090 { 3091 int i, error, *secflavors; 3092 3093 *credp = NULL; 3094 exp->nes_numsecflavor = 0; 3095 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 3096 if (error != 0) 3097 /* Make sure the server replies ESTALE to the client. */ 3098 error = ESTALE; 3099 if (nam && !error) { 3100 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3101 &exp->nes_numsecflavor, &secflavors); 3102 if (error) { 3103 if (nfs_rootfhset) { 3104 exp->nes_exflag = 0; 3105 exp->nes_numsecflavor = 0; 3106 error = 0; 3107 } else { 3108 vput(*vpp); 3109 } 3110 } else if (exp->nes_numsecflavor < 1 || exp->nes_numsecflavor > 3111 MAXSECFLAVORS) { 3112 printf("nfsvno_fhtovp: numsecflavors out of range\n"); 3113 exp->nes_numsecflavor = 0; 3114 error = EACCES; 3115 vput(*vpp); 3116 } else { 3117 /* Copy the security flavors. */ 3118 for (i = 0; i < exp->nes_numsecflavor; i++) 3119 exp->nes_secflavors[i] = secflavors[i]; 3120 } 3121 } 3122 NFSEXITCODE(error); 3123 return (error); 3124 } 3125 3126 /* 3127 * nfsd_fhtovp() - convert a fh to a vnode ptr 3128 * - look up fsid in mount list (if not found ret error) 3129 * - get vp and export rights by calling nfsvno_fhtovp() 3130 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 3131 * for AUTH_SYS 3132 * - if mpp != NULL, return the mount point so that it can 3133 * be used for vn_finished_write() by the caller 3134 */ 3135 void 3136 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 3137 struct vnode **vpp, struct nfsexstuff *exp, 3138 struct mount **mpp, int startwrite) 3139 { 3140 struct mount *mp; 3141 struct ucred *credanon; 3142 fhandle_t *fhp; 3143 3144 fhp = (fhandle_t *)nfp->nfsrvfh_data; 3145 /* 3146 * Check for the special case of the nfsv4root_fh. 3147 */ 3148 mp = vfs_busyfs(&fhp->fh_fsid); 3149 if (mpp != NULL) 3150 *mpp = mp; 3151 if (mp == NULL) { 3152 *vpp = NULL; 3153 nd->nd_repstat = ESTALE; 3154 goto out; 3155 } 3156 3157 if (startwrite) { 3158 vn_start_write(NULL, mpp, V_WAIT); 3159 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 3160 lktype = LK_EXCLUSIVE; 3161 } 3162 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 3163 &credanon); 3164 vfs_unbusy(mp); 3165 3166 /* 3167 * For NFSv4 without a pseudo root fs, unexported file handles 3168 * can be returned, so that Lookup works everywhere. 3169 */ 3170 if (!nd->nd_repstat && exp->nes_exflag == 0 && 3171 !(nd->nd_flag & ND_NFSV4)) { 3172 vput(*vpp); 3173 nd->nd_repstat = EACCES; 3174 } 3175 3176 /* 3177 * Personally, I've never seen any point in requiring a 3178 * reserved port#, since only in the rare case where the 3179 * clients are all boxes with secure system privileges, 3180 * does it provide any enhanced security, but... some people 3181 * believe it to be useful and keep putting this code back in. 3182 * (There is also some "security checker" out there that 3183 * complains if the nfs server doesn't enforce this.) 3184 * However, note the following: 3185 * RFC3530 (NFSv4) specifies that a reserved port# not be 3186 * required. 3187 * RFC2623 recommends that, if a reserved port# is checked for, 3188 * that there be a way to turn that off--> ifdef'd. 3189 */ 3190 #ifdef NFS_REQRSVPORT 3191 if (!nd->nd_repstat) { 3192 struct sockaddr_in *saddr; 3193 struct sockaddr_in6 *saddr6; 3194 3195 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3196 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 3197 if (!(nd->nd_flag & ND_NFSV4) && 3198 ((saddr->sin_family == AF_INET && 3199 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 3200 (saddr6->sin6_family == AF_INET6 && 3201 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 3202 vput(*vpp); 3203 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3204 } 3205 } 3206 #endif /* NFS_REQRSVPORT */ 3207 3208 /* 3209 * Check/setup credentials. 3210 */ 3211 if (!nd->nd_repstat) { 3212 nd->nd_saveduid = nd->nd_cred->cr_uid; 3213 nd->nd_repstat = nfsd_excred(nd, exp, credanon); 3214 if (nd->nd_repstat) 3215 vput(*vpp); 3216 } 3217 if (credanon != NULL) 3218 crfree(credanon); 3219 if (nd->nd_repstat) { 3220 if (startwrite) 3221 vn_finished_write(mp); 3222 *vpp = NULL; 3223 if (mpp != NULL) 3224 *mpp = NULL; 3225 } 3226 3227 out: 3228 NFSEXITCODE2(0, nd); 3229 } 3230 3231 /* 3232 * glue for fp. 3233 */ 3234 static int 3235 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 3236 { 3237 struct filedesc *fdp; 3238 struct file *fp; 3239 int error = 0; 3240 3241 fdp = p->td_proc->p_fd; 3242 if (fd < 0 || fd >= fdp->fd_nfiles || 3243 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 3244 error = EBADF; 3245 goto out; 3246 } 3247 *fpp = fp; 3248 3249 out: 3250 NFSEXITCODE(error); 3251 return (error); 3252 } 3253 3254 /* 3255 * Called from nfssvc() to update the exports list. Just call 3256 * vfs_export(). This has to be done, since the v4 root fake fs isn't 3257 * in the mount list. 3258 */ 3259 int 3260 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 3261 { 3262 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 3263 int error = 0; 3264 struct nameidata nd; 3265 fhandle_t fh; 3266 3267 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 3268 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 3269 nfs_rootfhset = 0; 3270 else if (error == 0) { 3271 if (nfsexargp->fspec == NULL) { 3272 error = EPERM; 3273 goto out; 3274 } 3275 /* 3276 * If fspec != NULL, this is the v4root path. 3277 */ 3278 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 3279 nfsexargp->fspec, p); 3280 if ((error = namei(&nd)) != 0) 3281 goto out; 3282 error = nfsvno_getfh(nd.ni_vp, &fh, p); 3283 vrele(nd.ni_vp); 3284 if (!error) { 3285 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 3286 NFSBCOPY((caddr_t)&fh, 3287 nfs_rootfh.nfsrvfh_data, 3288 sizeof (fhandle_t)); 3289 nfs_rootfhset = 1; 3290 } 3291 } 3292 3293 out: 3294 NFSEXITCODE(error); 3295 return (error); 3296 } 3297 3298 /* 3299 * This function needs to test to see if the system is near its limit 3300 * for memory allocation via malloc() or mget() and return True iff 3301 * either of these resources are near their limit. 3302 * XXX (For now, this is just a stub.) 3303 */ 3304 int nfsrv_testmalloclimit = 0; 3305 int 3306 nfsrv_mallocmget_limit(void) 3307 { 3308 static int printmesg = 0; 3309 static int testval = 1; 3310 3311 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 3312 if ((printmesg++ % 100) == 0) 3313 printf("nfsd: malloc/mget near limit\n"); 3314 return (1); 3315 } 3316 return (0); 3317 } 3318 3319 /* 3320 * BSD specific initialization of a mount point. 3321 */ 3322 void 3323 nfsd_mntinit(void) 3324 { 3325 static int inited = 0; 3326 3327 if (inited) 3328 return; 3329 inited = 1; 3330 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 3331 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 3332 TAILQ_INIT(&nfsv4root_mnt.mnt_lazyvnodelist); 3333 nfsv4root_mnt.mnt_export = NULL; 3334 TAILQ_INIT(&nfsv4root_opt); 3335 TAILQ_INIT(&nfsv4root_newopt); 3336 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 3337 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 3338 nfsv4root_mnt.mnt_nvnodelistsize = 0; 3339 nfsv4root_mnt.mnt_lazyvnodelistsize = 0; 3340 } 3341 3342 /* 3343 * Get a vnode for a file handle, without checking exports, etc. 3344 */ 3345 struct vnode * 3346 nfsvno_getvp(fhandle_t *fhp) 3347 { 3348 struct mount *mp; 3349 struct vnode *vp; 3350 int error; 3351 3352 mp = vfs_busyfs(&fhp->fh_fsid); 3353 if (mp == NULL) 3354 return (NULL); 3355 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 3356 vfs_unbusy(mp); 3357 if (error) 3358 return (NULL); 3359 return (vp); 3360 } 3361 3362 /* 3363 * Do a local VOP_ADVLOCK(). 3364 */ 3365 int 3366 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3367 u_int64_t end, struct thread *td) 3368 { 3369 int error = 0; 3370 struct flock fl; 3371 u_int64_t tlen; 3372 3373 if (nfsrv_dolocallocks == 0) 3374 goto out; 3375 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3376 3377 fl.l_whence = SEEK_SET; 3378 fl.l_type = ftype; 3379 fl.l_start = (off_t)first; 3380 if (end == NFS64BITSSET) { 3381 fl.l_len = 0; 3382 } else { 3383 tlen = end - first; 3384 fl.l_len = (off_t)tlen; 3385 } 3386 /* 3387 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3388 * values for all calls, so that all locks will be held by the 3389 * nfsd server. (The nfsd server handles conflicts between the 3390 * various clients.) 3391 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3392 * bytes, so it can't be put in l_sysid. 3393 */ 3394 if (nfsv4_sysid == 0) 3395 nfsv4_sysid = nlm_acquire_next_sysid(); 3396 fl.l_pid = (pid_t)0; 3397 fl.l_sysid = (int)nfsv4_sysid; 3398 3399 if (ftype == F_UNLCK) 3400 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3401 (F_POSIX | F_REMOTE)); 3402 else 3403 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3404 (F_POSIX | F_REMOTE)); 3405 3406 out: 3407 NFSEXITCODE(error); 3408 return (error); 3409 } 3410 3411 /* 3412 * Check the nfsv4 root exports. 3413 */ 3414 int 3415 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3416 { 3417 struct ucred *credanon; 3418 int exflags, error = 0, numsecflavor, *secflavors, i; 3419 3420 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3421 &credanon, &numsecflavor, &secflavors); 3422 if (error) { 3423 error = NFSERR_PROGUNAVAIL; 3424 goto out; 3425 } 3426 if (credanon != NULL) 3427 crfree(credanon); 3428 for (i = 0; i < numsecflavor; i++) { 3429 if (secflavors[i] == AUTH_SYS) 3430 nd->nd_flag |= ND_EXAUTHSYS; 3431 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3432 nd->nd_flag |= ND_EXGSS; 3433 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3434 nd->nd_flag |= ND_EXGSSINTEGRITY; 3435 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3436 nd->nd_flag |= ND_EXGSSPRIVACY; 3437 } 3438 3439 out: 3440 NFSEXITCODE(error); 3441 return (error); 3442 } 3443 3444 /* 3445 * Nfs server pseudo system call for the nfsd's 3446 */ 3447 /* 3448 * MPSAFE 3449 */ 3450 static int 3451 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3452 { 3453 struct file *fp; 3454 struct nfsd_addsock_args sockarg; 3455 struct nfsd_nfsd_args nfsdarg; 3456 struct nfsd_nfsd_oargs onfsdarg; 3457 struct nfsd_pnfsd_args pnfsdarg; 3458 struct vnode *vp, *nvp, *curdvp; 3459 struct pnfsdsfile *pf; 3460 struct nfsdevice *ds, *fds; 3461 cap_rights_t rights; 3462 int buflen, error, ret; 3463 char *buf, *cp, *cp2, *cp3; 3464 char fname[PNFS_FILENAME_LEN + 1]; 3465 3466 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3467 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3468 if (error) 3469 goto out; 3470 /* 3471 * Since we don't know what rights might be required, 3472 * pretend that we need them all. It is better to be too 3473 * careful than too reckless. 3474 */ 3475 error = fget(td, sockarg.sock, 3476 cap_rights_init(&rights, CAP_SOCK_SERVER), &fp); 3477 if (error != 0) 3478 goto out; 3479 if (fp->f_type != DTYPE_SOCKET) { 3480 fdrop(fp, td); 3481 error = EPERM; 3482 goto out; 3483 } 3484 error = nfsrvd_addsock(fp); 3485 fdrop(fp, td); 3486 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3487 if (uap->argp == NULL) { 3488 error = EINVAL; 3489 goto out; 3490 } 3491 if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) { 3492 error = copyin(uap->argp, &onfsdarg, sizeof(onfsdarg)); 3493 if (error == 0) { 3494 nfsdarg.principal = onfsdarg.principal; 3495 nfsdarg.minthreads = onfsdarg.minthreads; 3496 nfsdarg.maxthreads = onfsdarg.maxthreads; 3497 nfsdarg.version = 1; 3498 nfsdarg.addr = NULL; 3499 nfsdarg.addrlen = 0; 3500 nfsdarg.dnshost = NULL; 3501 nfsdarg.dnshostlen = 0; 3502 nfsdarg.dspath = NULL; 3503 nfsdarg.dspathlen = 0; 3504 nfsdarg.mdspath = NULL; 3505 nfsdarg.mdspathlen = 0; 3506 nfsdarg.mirrorcnt = 1; 3507 } 3508 } else 3509 error = copyin(uap->argp, &nfsdarg, sizeof(nfsdarg)); 3510 if (error) 3511 goto out; 3512 if (nfsdarg.addrlen > 0 && nfsdarg.addrlen < 10000 && 3513 nfsdarg.dnshostlen > 0 && nfsdarg.dnshostlen < 10000 && 3514 nfsdarg.dspathlen > 0 && nfsdarg.dspathlen < 10000 && 3515 nfsdarg.mdspathlen > 0 && nfsdarg.mdspathlen < 10000 && 3516 nfsdarg.mirrorcnt >= 1 && 3517 nfsdarg.mirrorcnt <= NFSDEV_MAXMIRRORS && 3518 nfsdarg.addr != NULL && nfsdarg.dnshost != NULL && 3519 nfsdarg.dspath != NULL && nfsdarg.mdspath != NULL) { 3520 NFSD_DEBUG(1, "addrlen=%d dspathlen=%d dnslen=%d" 3521 " mdspathlen=%d mirrorcnt=%d\n", nfsdarg.addrlen, 3522 nfsdarg.dspathlen, nfsdarg.dnshostlen, 3523 nfsdarg.mdspathlen, nfsdarg.mirrorcnt); 3524 cp = malloc(nfsdarg.addrlen + 1, M_TEMP, M_WAITOK); 3525 error = copyin(nfsdarg.addr, cp, nfsdarg.addrlen); 3526 if (error != 0) { 3527 free(cp, M_TEMP); 3528 goto out; 3529 } 3530 cp[nfsdarg.addrlen] = '\0'; /* Ensure nul term. */ 3531 nfsdarg.addr = cp; 3532 cp = malloc(nfsdarg.dnshostlen + 1, M_TEMP, M_WAITOK); 3533 error = copyin(nfsdarg.dnshost, cp, nfsdarg.dnshostlen); 3534 if (error != 0) { 3535 free(nfsdarg.addr, M_TEMP); 3536 free(cp, M_TEMP); 3537 goto out; 3538 } 3539 cp[nfsdarg.dnshostlen] = '\0'; /* Ensure nul term. */ 3540 nfsdarg.dnshost = cp; 3541 cp = malloc(nfsdarg.dspathlen + 1, M_TEMP, M_WAITOK); 3542 error = copyin(nfsdarg.dspath, cp, nfsdarg.dspathlen); 3543 if (error != 0) { 3544 free(nfsdarg.addr, M_TEMP); 3545 free(nfsdarg.dnshost, M_TEMP); 3546 free(cp, M_TEMP); 3547 goto out; 3548 } 3549 cp[nfsdarg.dspathlen] = '\0'; /* Ensure nul term. */ 3550 nfsdarg.dspath = cp; 3551 cp = malloc(nfsdarg.mdspathlen + 1, M_TEMP, M_WAITOK); 3552 error = copyin(nfsdarg.mdspath, cp, nfsdarg.mdspathlen); 3553 if (error != 0) { 3554 free(nfsdarg.addr, M_TEMP); 3555 free(nfsdarg.dnshost, M_TEMP); 3556 free(nfsdarg.dspath, M_TEMP); 3557 free(cp, M_TEMP); 3558 goto out; 3559 } 3560 cp[nfsdarg.mdspathlen] = '\0'; /* Ensure nul term. */ 3561 nfsdarg.mdspath = cp; 3562 } else { 3563 nfsdarg.addr = NULL; 3564 nfsdarg.addrlen = 0; 3565 nfsdarg.dnshost = NULL; 3566 nfsdarg.dnshostlen = 0; 3567 nfsdarg.dspath = NULL; 3568 nfsdarg.dspathlen = 0; 3569 nfsdarg.mdspath = NULL; 3570 nfsdarg.mdspathlen = 0; 3571 nfsdarg.mirrorcnt = 1; 3572 } 3573 error = nfsrvd_nfsd(td, &nfsdarg); 3574 free(nfsdarg.addr, M_TEMP); 3575 free(nfsdarg.dnshost, M_TEMP); 3576 free(nfsdarg.dspath, M_TEMP); 3577 free(nfsdarg.mdspath, M_TEMP); 3578 } else if (uap->flag & NFSSVC_PNFSDS) { 3579 error = copyin(uap->argp, &pnfsdarg, sizeof(pnfsdarg)); 3580 if (error == 0 && (pnfsdarg.op == PNFSDOP_DELDSSERVER || 3581 pnfsdarg.op == PNFSDOP_FORCEDELDS)) { 3582 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3583 error = copyinstr(pnfsdarg.dspath, cp, PATH_MAX + 1, 3584 NULL); 3585 if (error == 0) 3586 error = nfsrv_deldsserver(pnfsdarg.op, cp, td); 3587 free(cp, M_TEMP); 3588 } else if (error == 0 && pnfsdarg.op == PNFSDOP_COPYMR) { 3589 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3590 buflen = sizeof(*pf) * NFSDEV_MAXMIRRORS; 3591 buf = malloc(buflen, M_TEMP, M_WAITOK); 3592 error = copyinstr(pnfsdarg.mdspath, cp, PATH_MAX + 1, 3593 NULL); 3594 NFSD_DEBUG(4, "pnfsdcopymr cp mdspath=%d\n", error); 3595 if (error == 0 && pnfsdarg.dspath != NULL) { 3596 cp2 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3597 error = copyinstr(pnfsdarg.dspath, cp2, 3598 PATH_MAX + 1, NULL); 3599 NFSD_DEBUG(4, "pnfsdcopymr cp dspath=%d\n", 3600 error); 3601 } else 3602 cp2 = NULL; 3603 if (error == 0 && pnfsdarg.curdspath != NULL) { 3604 cp3 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3605 error = copyinstr(pnfsdarg.curdspath, cp3, 3606 PATH_MAX + 1, NULL); 3607 NFSD_DEBUG(4, "pnfsdcopymr cp curdspath=%d\n", 3608 error); 3609 } else 3610 cp3 = NULL; 3611 curdvp = NULL; 3612 fds = NULL; 3613 if (error == 0) 3614 error = nfsrv_mdscopymr(cp, cp2, cp3, buf, 3615 &buflen, fname, td, &vp, &nvp, &pf, &ds, 3616 &fds); 3617 NFSD_DEBUG(4, "nfsrv_mdscopymr=%d\n", error); 3618 if (error == 0) { 3619 if (pf->dsf_dir >= nfsrv_dsdirsize) { 3620 printf("copymr: dsdir out of range\n"); 3621 pf->dsf_dir = 0; 3622 } 3623 NFSD_DEBUG(4, "copymr: buflen=%d\n", buflen); 3624 error = nfsrv_copymr(vp, nvp, 3625 ds->nfsdev_dsdir[pf->dsf_dir], ds, pf, 3626 (struct pnfsdsfile *)buf, 3627 buflen / sizeof(*pf), td->td_ucred, td); 3628 vput(vp); 3629 vput(nvp); 3630 if (fds != NULL && error == 0) { 3631 curdvp = fds->nfsdev_dsdir[pf->dsf_dir]; 3632 ret = vn_lock(curdvp, LK_EXCLUSIVE); 3633 if (ret == 0) { 3634 nfsrv_dsremove(curdvp, fname, 3635 td->td_ucred, td); 3636 NFSVOPUNLOCK(curdvp); 3637 } 3638 } 3639 NFSD_DEBUG(4, "nfsrv_copymr=%d\n", error); 3640 } 3641 free(cp, M_TEMP); 3642 free(cp2, M_TEMP); 3643 free(cp3, M_TEMP); 3644 free(buf, M_TEMP); 3645 } 3646 } else { 3647 error = nfssvc_srvcall(td, uap, td->td_ucred); 3648 } 3649 3650 out: 3651 NFSEXITCODE(error); 3652 return (error); 3653 } 3654 3655 static int 3656 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3657 { 3658 struct nfsex_args export; 3659 struct file *fp = NULL; 3660 int stablefd, len; 3661 struct nfsd_clid adminrevoke; 3662 struct nfsd_dumplist dumplist; 3663 struct nfsd_dumpclients *dumpclients; 3664 struct nfsd_dumplocklist dumplocklist; 3665 struct nfsd_dumplocks *dumplocks; 3666 struct nameidata nd; 3667 vnode_t vp; 3668 int error = EINVAL, igotlock; 3669 struct proc *procp; 3670 static int suspend_nfsd = 0; 3671 3672 if (uap->flag & NFSSVC_PUBLICFH) { 3673 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3674 sizeof (fhandle_t)); 3675 error = copyin(uap->argp, 3676 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3677 if (!error) 3678 nfs_pubfhset = 1; 3679 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) { 3680 error = copyin(uap->argp,(caddr_t)&export, 3681 sizeof (struct nfsex_args)); 3682 if (!error) 3683 error = nfsrv_v4rootexport(&export, cred, p); 3684 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3685 nfs_pubfhset = 0; 3686 error = 0; 3687 } else if (uap->flag & NFSSVC_STABLERESTART) { 3688 error = copyin(uap->argp, (caddr_t)&stablefd, 3689 sizeof (int)); 3690 if (!error) 3691 error = fp_getfvp(p, stablefd, &fp, &vp); 3692 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3693 error = EBADF; 3694 if (!error && newnfs_numnfsd != 0) 3695 error = EPERM; 3696 if (!error) { 3697 nfsrv_stablefirst.nsf_fp = fp; 3698 nfsrv_setupstable(p); 3699 } 3700 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3701 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3702 sizeof (struct nfsd_clid)); 3703 if (!error) 3704 error = nfsrv_adminrevoke(&adminrevoke, p); 3705 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3706 error = copyin(uap->argp, (caddr_t)&dumplist, 3707 sizeof (struct nfsd_dumplist)); 3708 if (!error && (dumplist.ndl_size < 1 || 3709 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3710 error = EPERM; 3711 if (!error) { 3712 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3713 dumpclients = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3714 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3715 error = copyout(dumpclients, 3716 CAST_USER_ADDR_T(dumplist.ndl_list), len); 3717 free(dumpclients, M_TEMP); 3718 } 3719 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3720 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3721 sizeof (struct nfsd_dumplocklist)); 3722 if (!error && (dumplocklist.ndllck_size < 1 || 3723 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3724 error = EPERM; 3725 if (!error) 3726 error = nfsrv_lookupfilename(&nd, 3727 dumplocklist.ndllck_fname, p); 3728 if (!error) { 3729 len = sizeof (struct nfsd_dumplocks) * 3730 dumplocklist.ndllck_size; 3731 dumplocks = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3732 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3733 dumplocklist.ndllck_size, p); 3734 vput(nd.ni_vp); 3735 error = copyout(dumplocks, 3736 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len); 3737 free(dumplocks, M_TEMP); 3738 } 3739 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3740 procp = p->td_proc; 3741 PROC_LOCK(procp); 3742 nfsd_master_pid = procp->p_pid; 3743 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3744 nfsd_master_start = procp->p_stats->p_start; 3745 nfsd_master_proc = procp; 3746 PROC_UNLOCK(procp); 3747 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 3748 NFSLOCKV4ROOTMUTEX(); 3749 if (suspend_nfsd == 0) { 3750 /* Lock out all nfsd threads */ 3751 do { 3752 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 3753 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 3754 } while (igotlock == 0 && suspend_nfsd == 0); 3755 suspend_nfsd = 1; 3756 } 3757 NFSUNLOCKV4ROOTMUTEX(); 3758 error = 0; 3759 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 3760 NFSLOCKV4ROOTMUTEX(); 3761 if (suspend_nfsd != 0) { 3762 nfsv4_unlock(&nfsd_suspend_lock, 0); 3763 suspend_nfsd = 0; 3764 } 3765 NFSUNLOCKV4ROOTMUTEX(); 3766 error = 0; 3767 } 3768 3769 NFSEXITCODE(error); 3770 return (error); 3771 } 3772 3773 /* 3774 * Check exports. 3775 * Returns 0 if ok, 1 otherwise. 3776 */ 3777 int 3778 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 3779 { 3780 int i; 3781 3782 /* 3783 * This seems odd, but allow the case where the security flavor 3784 * list is empty. This happens when NFSv4 is traversing non-exported 3785 * file systems. Exported file systems should always have a non-empty 3786 * security flavor list. 3787 */ 3788 if (exp->nes_numsecflavor == 0) 3789 return (0); 3790 3791 for (i = 0; i < exp->nes_numsecflavor; i++) { 3792 /* 3793 * The tests for privacy and integrity must be first, 3794 * since ND_GSS is set for everything but AUTH_SYS. 3795 */ 3796 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 3797 (nd->nd_flag & ND_GSSPRIVACY)) 3798 return (0); 3799 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 3800 (nd->nd_flag & ND_GSSINTEGRITY)) 3801 return (0); 3802 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 3803 (nd->nd_flag & ND_GSS)) 3804 return (0); 3805 if (exp->nes_secflavors[i] == AUTH_SYS && 3806 (nd->nd_flag & ND_GSS) == 0) 3807 return (0); 3808 } 3809 return (1); 3810 } 3811 3812 /* 3813 * Calculate a hash value for the fid in a file handle. 3814 */ 3815 uint32_t 3816 nfsrv_hashfh(fhandle_t *fhp) 3817 { 3818 uint32_t hashval; 3819 3820 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 3821 return (hashval); 3822 } 3823 3824 /* 3825 * Calculate a hash value for the sessionid. 3826 */ 3827 uint32_t 3828 nfsrv_hashsessionid(uint8_t *sessionid) 3829 { 3830 uint32_t hashval; 3831 3832 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 3833 return (hashval); 3834 } 3835 3836 /* 3837 * Signal the userland master nfsd to backup the stable restart file. 3838 */ 3839 void 3840 nfsrv_backupstable(void) 3841 { 3842 struct proc *procp; 3843 3844 if (nfsd_master_proc != NULL) { 3845 procp = pfind(nfsd_master_pid); 3846 /* Try to make sure it is the correct process. */ 3847 if (procp == nfsd_master_proc && 3848 procp->p_stats->p_start.tv_sec == 3849 nfsd_master_start.tv_sec && 3850 procp->p_stats->p_start.tv_usec == 3851 nfsd_master_start.tv_usec && 3852 strcmp(procp->p_comm, nfsd_master_comm) == 0) 3853 kern_psignal(procp, SIGUSR2); 3854 else 3855 nfsd_master_proc = NULL; 3856 3857 if (procp != NULL) 3858 PROC_UNLOCK(procp); 3859 } 3860 } 3861 3862 /* 3863 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 3864 * The arguments are in a structure, so that they can be passed through 3865 * taskqueue for a kernel process to execute this function. 3866 */ 3867 struct nfsrvdscreate { 3868 int done; 3869 int inprog; 3870 struct task tsk; 3871 struct ucred *tcred; 3872 struct vnode *dvp; 3873 NFSPROC_T *p; 3874 struct pnfsdsfile *pf; 3875 int err; 3876 fhandle_t fh; 3877 struct vattr va; 3878 struct vattr createva; 3879 }; 3880 3881 int 3882 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 3883 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 3884 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 3885 { 3886 struct vnode *nvp; 3887 struct nameidata named; 3888 struct vattr va; 3889 char *bufp; 3890 u_long *hashp; 3891 struct nfsnode *np; 3892 struct nfsmount *nmp; 3893 int error; 3894 3895 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 3896 LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE); 3897 nfsvno_setpathbuf(&named, &bufp, &hashp); 3898 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 3899 named.ni_cnd.cn_thread = p; 3900 named.ni_cnd.cn_nameptr = bufp; 3901 if (fnamep != NULL) { 3902 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 3903 named.ni_cnd.cn_namelen = strlen(bufp); 3904 } else 3905 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 3906 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 3907 3908 /* Create the date file in the DS mount. */ 3909 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 3910 if (error == 0) { 3911 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 3912 NFSVOPUNLOCK(dvp); 3913 if (error == 0) { 3914 /* Set the ownership of the file. */ 3915 error = VOP_SETATTR(nvp, nvap, tcred); 3916 NFSD_DEBUG(4, "nfsrv_dscreate:" 3917 " setattr-uid=%d\n", error); 3918 if (error != 0) 3919 vput(nvp); 3920 } 3921 if (error != 0) 3922 printf("pNFS: pnfscreate failed=%d\n", error); 3923 } else 3924 printf("pNFS: pnfscreate vnlock=%d\n", error); 3925 if (error == 0) { 3926 np = VTONFS(nvp); 3927 nmp = VFSTONFS(nvp->v_mount); 3928 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 3929 != 0 || nmp->nm_nam->sa_len > sizeof( 3930 struct sockaddr_in6) || 3931 np->n_fhp->nfh_len != NFSX_MYFH) { 3932 printf("Bad DS file: fstype=%s salen=%d" 3933 " fhlen=%d\n", 3934 nvp->v_mount->mnt_vfc->vfc_name, 3935 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 3936 error = ENOENT; 3937 } 3938 3939 /* Set extattrs for the DS on the MDS file. */ 3940 if (error == 0) { 3941 if (dsa != NULL) { 3942 error = VOP_GETATTR(nvp, &va, tcred); 3943 if (error == 0) { 3944 dsa->dsa_filerev = va.va_filerev; 3945 dsa->dsa_size = va.va_size; 3946 dsa->dsa_atime = va.va_atime; 3947 dsa->dsa_mtime = va.va_mtime; 3948 dsa->dsa_bytes = va.va_bytes; 3949 } 3950 } 3951 if (error == 0) { 3952 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 3953 NFSX_MYFH); 3954 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 3955 nmp->nm_nam->sa_len); 3956 NFSBCOPY(named.ni_cnd.cn_nameptr, 3957 pf->dsf_filename, 3958 sizeof(pf->dsf_filename)); 3959 } 3960 } else 3961 printf("pNFS: pnfscreate can't get DS" 3962 " attr=%d\n", error); 3963 if (nvpp != NULL && error == 0) 3964 *nvpp = nvp; 3965 else 3966 vput(nvp); 3967 } 3968 nfsvno_relpathbuf(&named); 3969 return (error); 3970 } 3971 3972 /* 3973 * Start up the thread that will execute nfsrv_dscreate(). 3974 */ 3975 static void 3976 start_dscreate(void *arg, int pending) 3977 { 3978 struct nfsrvdscreate *dsc; 3979 3980 dsc = (struct nfsrvdscreate *)arg; 3981 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 3982 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 3983 dsc->done = 1; 3984 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 3985 } 3986 3987 /* 3988 * Create a pNFS data file on the Data Server(s). 3989 */ 3990 static void 3991 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 3992 NFSPROC_T *p) 3993 { 3994 struct nfsrvdscreate *dsc, *tdsc = NULL; 3995 struct nfsdevice *ds, *tds, *fds; 3996 struct mount *mp; 3997 struct pnfsdsfile *pf, *tpf; 3998 struct pnfsdsattr dsattr; 3999 struct vattr va; 4000 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4001 struct nfsmount *nmp; 4002 fhandle_t fh; 4003 uid_t vauid; 4004 gid_t vagid; 4005 u_short vamode; 4006 struct ucred *tcred; 4007 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 4008 int failpos, timo; 4009 4010 /* Get a DS server directory in a round-robin order. */ 4011 mirrorcnt = 1; 4012 mp = vp->v_mount; 4013 ds = fds = NULL; 4014 NFSDDSLOCK(); 4015 /* 4016 * Search for the first entry that handles this MDS fs, but use the 4017 * first entry for all MDS fs's otherwise. 4018 */ 4019 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 4020 if (tds->nfsdev_nmp != NULL) { 4021 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 4022 ds = tds; 4023 else if (tds->nfsdev_mdsisset != 0 && 4024 mp->mnt_stat.f_fsid.val[0] == 4025 tds->nfsdev_mdsfsid.val[0] && 4026 mp->mnt_stat.f_fsid.val[1] == 4027 tds->nfsdev_mdsfsid.val[1]) { 4028 ds = fds = tds; 4029 break; 4030 } 4031 } 4032 } 4033 if (ds == NULL) { 4034 NFSDDSUNLOCK(); 4035 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 4036 return; 4037 } 4038 i = dsdir[0] = ds->nfsdev_nextdir; 4039 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 4040 dvp[0] = ds->nfsdev_dsdir[i]; 4041 tds = TAILQ_NEXT(ds, nfsdev_list); 4042 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 4043 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 4044 if (tds->nfsdev_nmp != NULL && 4045 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 4046 (tds->nfsdev_mdsisset != 0 && fds != NULL && 4047 mp->mnt_stat.f_fsid.val[0] == 4048 tds->nfsdev_mdsfsid.val[0] && 4049 mp->mnt_stat.f_fsid.val[1] == 4050 tds->nfsdev_mdsfsid.val[1]))) { 4051 dsdir[mirrorcnt] = i; 4052 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 4053 mirrorcnt++; 4054 if (mirrorcnt >= nfsrv_maxpnfsmirror) 4055 break; 4056 } 4057 } 4058 } 4059 /* Put at end of list to implement round-robin usage. */ 4060 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 4061 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 4062 NFSDDSUNLOCK(); 4063 dsc = NULL; 4064 if (mirrorcnt > 1) 4065 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 4066 M_WAITOK | M_ZERO); 4067 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 4068 M_ZERO); 4069 4070 error = nfsvno_getfh(vp, &fh, p); 4071 if (error == 0) 4072 error = VOP_GETATTR(vp, &va, cred); 4073 if (error == 0) { 4074 /* Set the attributes for "vp" to Setattr the DS vp. */ 4075 vauid = va.va_uid; 4076 vagid = va.va_gid; 4077 vamode = va.va_mode; 4078 VATTR_NULL(&va); 4079 va.va_uid = vauid; 4080 va.va_gid = vagid; 4081 va.va_mode = vamode; 4082 va.va_size = 0; 4083 } else 4084 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 4085 4086 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 4087 cred->cr_gid); 4088 /* Make data file name based on FH. */ 4089 tcred = newnfs_getcred(); 4090 4091 /* 4092 * Create the file on each DS mirror, using kernel process(es) for the 4093 * additional mirrors. 4094 */ 4095 failpos = -1; 4096 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 4097 tpf->dsf_dir = dsdir[i]; 4098 tdsc->tcred = tcred; 4099 tdsc->p = p; 4100 tdsc->pf = tpf; 4101 tdsc->createva = *vap; 4102 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 4103 tdsc->va = va; 4104 tdsc->dvp = dvp[i]; 4105 tdsc->done = 0; 4106 tdsc->inprog = 0; 4107 tdsc->err = 0; 4108 ret = EIO; 4109 if (nfs_pnfsiothreads != 0) { 4110 ret = nfs_pnfsio(start_dscreate, tdsc); 4111 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 4112 } 4113 if (ret != 0) { 4114 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 4115 NULL, tcred, p, NULL); 4116 if (ret != 0) { 4117 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 4118 error)); 4119 if (failpos == -1 && nfsds_failerr(ret)) 4120 failpos = i; 4121 else 4122 error = ret; 4123 } 4124 } 4125 } 4126 if (error == 0) { 4127 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4128 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4129 &dsattr, NULL, tcred, p, NULL); 4130 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4131 failpos = mirrorcnt - 1; 4132 error = 0; 4133 } 4134 } 4135 timo = hz / 50; /* Wait for 20msec. */ 4136 if (timo < 1) 4137 timo = 1; 4138 /* Wait for kernel task(s) to complete. */ 4139 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4140 while (tdsc->inprog != 0 && tdsc->done == 0) 4141 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4142 if (tdsc->err != 0) { 4143 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4144 failpos = i; 4145 else if (error == 0) 4146 error = tdsc->err; 4147 } 4148 } 4149 4150 /* 4151 * If failpos has been set, that mirror has failed, so it needs 4152 * to be disabled. 4153 */ 4154 if (failpos >= 0) { 4155 nmp = VFSTONFS(dvp[failpos]->v_mount); 4156 NFSLOCKMNT(nmp); 4157 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4158 NFSMNTP_CANCELRPCS)) == 0) { 4159 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4160 NFSUNLOCKMNT(nmp); 4161 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4162 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4163 ds); 4164 if (ds != NULL) 4165 nfsrv_killrpcs(nmp); 4166 NFSLOCKMNT(nmp); 4167 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4168 wakeup(nmp); 4169 } 4170 NFSUNLOCKMNT(nmp); 4171 } 4172 4173 NFSFREECRED(tcred); 4174 if (error == 0) { 4175 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4176 4177 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4178 mirrorcnt, nfsrv_maxpnfsmirror); 4179 /* 4180 * For all mirrors that couldn't be created, fill in the 4181 * *pf structure, but with an IP address == 0.0.0.0. 4182 */ 4183 tpf = pf + mirrorcnt; 4184 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4185 *tpf = *pf; 4186 tpf->dsf_sin.sin_family = AF_INET; 4187 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4188 tpf->dsf_sin.sin_addr.s_addr = 0; 4189 tpf->dsf_sin.sin_port = 0; 4190 } 4191 4192 error = vn_extattr_set(vp, IO_NODELOCKED, 4193 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4194 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4195 if (error == 0) 4196 error = vn_extattr_set(vp, IO_NODELOCKED, 4197 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4198 sizeof(dsattr), (char *)&dsattr, p); 4199 if (error != 0) 4200 printf("pNFS: pnfscreate setextattr=%d\n", 4201 error); 4202 } else 4203 printf("pNFS: pnfscreate=%d\n", error); 4204 free(pf, M_TEMP); 4205 free(dsc, M_TEMP); 4206 } 4207 4208 /* 4209 * Get the information needed to remove the pNFS Data Server file from the 4210 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4211 * DS directory vnode. The caller must unlock *ddvp when done with it. 4212 */ 4213 static void 4214 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4215 int *mirrorcntp, char *fname, fhandle_t *fhp) 4216 { 4217 struct vattr va; 4218 struct ucred *tcred; 4219 char *buf; 4220 int buflen, error; 4221 4222 dvpp[0] = NULL; 4223 /* If not an exported regular file or not a pNFS server, just return. */ 4224 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4225 nfsrv_devidcnt == 0) 4226 return; 4227 4228 /* Check to see if this is the last hard link. */ 4229 tcred = newnfs_getcred(); 4230 error = VOP_GETATTR(vp, &va, tcred); 4231 NFSFREECRED(tcred); 4232 if (error != 0) { 4233 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4234 return; 4235 } 4236 if (va.va_nlink > 1) 4237 return; 4238 4239 error = nfsvno_getfh(vp, fhp, p); 4240 if (error != 0) { 4241 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4242 return; 4243 } 4244 4245 buflen = 1024; 4246 buf = malloc(buflen, M_TEMP, M_WAITOK); 4247 /* Get the directory vnode for the DS mount and the file handle. */ 4248 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4249 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4250 free(buf, M_TEMP); 4251 if (error != 0) 4252 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4253 } 4254 4255 /* 4256 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4257 * The arguments are in a structure, so that they can be passed through 4258 * taskqueue for a kernel process to execute this function. 4259 */ 4260 struct nfsrvdsremove { 4261 int done; 4262 int inprog; 4263 struct task tsk; 4264 struct ucred *tcred; 4265 struct vnode *dvp; 4266 NFSPROC_T *p; 4267 int err; 4268 char fname[PNFS_FILENAME_LEN + 1]; 4269 }; 4270 4271 static int 4272 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4273 NFSPROC_T *p) 4274 { 4275 struct nameidata named; 4276 struct vnode *nvp; 4277 char *bufp; 4278 u_long *hashp; 4279 int error; 4280 4281 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4282 if (error != 0) 4283 return (error); 4284 named.ni_cnd.cn_nameiop = DELETE; 4285 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4286 named.ni_cnd.cn_cred = tcred; 4287 named.ni_cnd.cn_thread = p; 4288 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 4289 nfsvno_setpathbuf(&named, &bufp, &hashp); 4290 named.ni_cnd.cn_nameptr = bufp; 4291 named.ni_cnd.cn_namelen = strlen(fname); 4292 strlcpy(bufp, fname, NAME_MAX); 4293 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4294 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4295 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4296 if (error == 0) { 4297 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4298 vput(nvp); 4299 } 4300 NFSVOPUNLOCK(dvp); 4301 nfsvno_relpathbuf(&named); 4302 if (error != 0) 4303 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4304 return (error); 4305 } 4306 4307 /* 4308 * Start up the thread that will execute nfsrv_dsremove(). 4309 */ 4310 static void 4311 start_dsremove(void *arg, int pending) 4312 { 4313 struct nfsrvdsremove *dsrm; 4314 4315 dsrm = (struct nfsrvdsremove *)arg; 4316 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4317 dsrm->p); 4318 dsrm->done = 1; 4319 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4320 } 4321 4322 /* 4323 * Remove a pNFS data file from a Data Server. 4324 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4325 * removed to set up the dvp and fill in the FH. 4326 */ 4327 static void 4328 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4329 NFSPROC_T *p) 4330 { 4331 struct ucred *tcred; 4332 struct nfsrvdsremove *dsrm, *tdsrm; 4333 struct nfsdevice *ds; 4334 struct nfsmount *nmp; 4335 int failpos, i, ret, timo; 4336 4337 tcred = newnfs_getcred(); 4338 dsrm = NULL; 4339 if (mirrorcnt > 1) 4340 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4341 /* 4342 * Remove the file on each DS mirror, using kernel process(es) for the 4343 * additional mirrors. 4344 */ 4345 failpos = -1; 4346 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4347 tdsrm->tcred = tcred; 4348 tdsrm->p = p; 4349 tdsrm->dvp = dvp[i]; 4350 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4351 tdsrm->inprog = 0; 4352 tdsrm->done = 0; 4353 tdsrm->err = 0; 4354 ret = EIO; 4355 if (nfs_pnfsiothreads != 0) { 4356 ret = nfs_pnfsio(start_dsremove, tdsrm); 4357 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4358 } 4359 if (ret != 0) { 4360 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4361 if (failpos == -1 && nfsds_failerr(ret)) 4362 failpos = i; 4363 } 4364 } 4365 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4366 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4367 failpos = mirrorcnt - 1; 4368 timo = hz / 50; /* Wait for 20msec. */ 4369 if (timo < 1) 4370 timo = 1; 4371 /* Wait for kernel task(s) to complete. */ 4372 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4373 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4374 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4375 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4376 failpos = i; 4377 } 4378 4379 /* 4380 * If failpos has been set, that mirror has failed, so it needs 4381 * to be disabled. 4382 */ 4383 if (failpos >= 0) { 4384 nmp = VFSTONFS(dvp[failpos]->v_mount); 4385 NFSLOCKMNT(nmp); 4386 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4387 NFSMNTP_CANCELRPCS)) == 0) { 4388 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4389 NFSUNLOCKMNT(nmp); 4390 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4391 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4392 ds); 4393 if (ds != NULL) 4394 nfsrv_killrpcs(nmp); 4395 NFSLOCKMNT(nmp); 4396 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4397 wakeup(nmp); 4398 } 4399 NFSUNLOCKMNT(nmp); 4400 } 4401 4402 /* Get rid all layouts for the file. */ 4403 nfsrv_freefilelayouts(fhp); 4404 4405 NFSFREECRED(tcred); 4406 free(dsrm, M_TEMP); 4407 } 4408 4409 /* 4410 * Generate a file name based on the file handle and put it in *bufp. 4411 * Return the number of bytes generated. 4412 */ 4413 static int 4414 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4415 { 4416 int i; 4417 uint8_t *cp; 4418 const uint8_t *hexdigits = "0123456789abcdef"; 4419 4420 cp = (uint8_t *)fhp; 4421 for (i = 0; i < sizeof(*fhp); i++) { 4422 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4423 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4424 } 4425 bufp[2 * i] = '\0'; 4426 return (2 * i); 4427 } 4428 4429 /* 4430 * Update the Metadata file's attributes from the DS file when a Read/Write 4431 * layout is returned. 4432 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4433 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4434 */ 4435 int 4436 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4437 { 4438 struct ucred *tcred; 4439 int error; 4440 4441 /* Do this as root so that it won't fail with EACCES. */ 4442 tcred = newnfs_getcred(); 4443 error = nfsrv_proxyds(vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4444 NULL, NULL, NULL, nap, NULL, NULL, 0, NULL); 4445 NFSFREECRED(tcred); 4446 return (error); 4447 } 4448 4449 /* 4450 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4451 */ 4452 static int 4453 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4454 NFSPROC_T *p) 4455 { 4456 int error; 4457 4458 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETACL, 4459 NULL, NULL, NULL, NULL, aclp, NULL, 0, NULL); 4460 return (error); 4461 } 4462 4463 static int 4464 nfsrv_proxyds(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 4465 struct thread *p, int ioproc, struct mbuf **mpp, char *cp, 4466 struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp, 4467 off_t *offp, int content, bool *eofp) 4468 { 4469 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4470 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4471 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4472 struct nfsdevice *ds; 4473 struct pnfsdsattr dsattr; 4474 struct opnfsdsattr odsattr; 4475 char *buf; 4476 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4477 4478 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4479 /* 4480 * If not a regular file, not exported or not a pNFS server, 4481 * just return ENOENT. 4482 */ 4483 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4484 nfsrv_devidcnt == 0) 4485 return (ENOENT); 4486 4487 buflen = 1024; 4488 buf = malloc(buflen, M_TEMP, M_WAITOK); 4489 error = 0; 4490 4491 /* 4492 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4493 * from the MetaData file's extended attribute. 4494 */ 4495 if (ioproc == NFSPROC_GETATTR) { 4496 error = vn_extattr_get(vp, IO_NODELOCKED, 4497 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4498 p); 4499 if (error == 0) { 4500 if (buflen == sizeof(odsattr)) { 4501 NFSBCOPY(buf, &odsattr, buflen); 4502 nap->na_filerev = odsattr.dsa_filerev; 4503 nap->na_size = odsattr.dsa_size; 4504 nap->na_atime = odsattr.dsa_atime; 4505 nap->na_mtime = odsattr.dsa_mtime; 4506 /* 4507 * Fake na_bytes by rounding up na_size. 4508 * Since we don't know the block size, just 4509 * use BLKDEV_IOSIZE. 4510 */ 4511 nap->na_bytes = (odsattr.dsa_size + 4512 BLKDEV_IOSIZE - 1) & ~(BLKDEV_IOSIZE - 1); 4513 } else if (buflen == sizeof(dsattr)) { 4514 NFSBCOPY(buf, &dsattr, buflen); 4515 nap->na_filerev = dsattr.dsa_filerev; 4516 nap->na_size = dsattr.dsa_size; 4517 nap->na_atime = dsattr.dsa_atime; 4518 nap->na_mtime = dsattr.dsa_mtime; 4519 nap->na_bytes = dsattr.dsa_bytes; 4520 } else 4521 error = ENXIO; 4522 } 4523 if (error == 0) { 4524 /* 4525 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4526 * returns 0, just return now. nfsrv_checkdsattr() 4527 * returns 0 if there is no Read/Write layout 4528 * plus either an Open/Write_access or Write 4529 * delegation issued to a client for the file. 4530 */ 4531 if (nfsrv_pnfsgetdsattr == 0 || 4532 nfsrv_checkdsattr(vp, p) == 0) { 4533 free(buf, M_TEMP); 4534 return (error); 4535 } 4536 } 4537 4538 /* 4539 * Clear ENOATTR so the code below will attempt to do a 4540 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4541 * the extended attribute. 4542 */ 4543 if (error == ENOATTR) 4544 error = 0; 4545 } 4546 4547 origmircnt = -1; 4548 trycnt = 0; 4549 tryagain: 4550 if (error == 0) { 4551 buflen = 1024; 4552 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4553 LK_EXCLUSIVE) 4554 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4555 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4556 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4557 NULL, NULL); 4558 if (error == 0) { 4559 for (i = 0; i < mirrorcnt; i++) 4560 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4561 } else 4562 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4563 } else 4564 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4565 if (error == 0) { 4566 failpos = -1; 4567 if (origmircnt == -1) 4568 origmircnt = mirrorcnt; 4569 /* 4570 * If failpos is set to a mirror#, then that mirror has 4571 * failed and will be disabled. For Read, Getattr and Seek, the 4572 * function only tries one mirror, so if that mirror has 4573 * failed, it will need to be retried. As such, increment 4574 * tryitagain for these cases. 4575 * For Write, Setattr and Setacl, the function tries all 4576 * mirrors and will not return an error for the case where 4577 * one mirror has failed. For these cases, the functioning 4578 * mirror(s) will have been modified, so a retry isn't 4579 * necessary. These functions will set failpos for the 4580 * failed mirror#. 4581 */ 4582 if (ioproc == NFSPROC_READDS) { 4583 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4584 mpp, mpp2); 4585 if (nfsds_failerr(error) && mirrorcnt > 1) { 4586 /* 4587 * Setting failpos will cause the mirror 4588 * to be disabled and then a retry of this 4589 * read is required. 4590 */ 4591 failpos = 0; 4592 error = 0; 4593 trycnt++; 4594 } 4595 } else if (ioproc == NFSPROC_WRITEDS) 4596 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4597 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4598 else if (ioproc == NFSPROC_SETATTR) 4599 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4600 mirrorcnt, nap, &failpos); 4601 else if (ioproc == NFSPROC_SETACL) 4602 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4603 mirrorcnt, aclp, &failpos); 4604 else if (ioproc == NFSPROC_SEEKDS) { 4605 error = nfsrv_seekdsrpc(fh, offp, content, eofp, cred, 4606 p, nmp[0]); 4607 if (nfsds_failerr(error) && mirrorcnt > 1) { 4608 /* 4609 * Setting failpos will cause the mirror 4610 * to be disabled and then a retry of this 4611 * read is required. 4612 */ 4613 failpos = 0; 4614 error = 0; 4615 trycnt++; 4616 } 4617 } else if (ioproc == NFSPROC_ALLOCATE) 4618 error = nfsrv_allocatedsrpc(fh, off, *offp, cred, p, vp, 4619 &nmp[0], mirrorcnt, &failpos); 4620 else { 4621 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4622 vp, nmp[mirrorcnt - 1], nap); 4623 if (nfsds_failerr(error) && mirrorcnt > 1) { 4624 /* 4625 * Setting failpos will cause the mirror 4626 * to be disabled and then a retry of this 4627 * getattr is required. 4628 */ 4629 failpos = mirrorcnt - 1; 4630 error = 0; 4631 trycnt++; 4632 } 4633 } 4634 ds = NULL; 4635 if (failpos >= 0) { 4636 failnmp = nmp[failpos]; 4637 NFSLOCKMNT(failnmp); 4638 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4639 NFSMNTP_CANCELRPCS)) == 0) { 4640 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4641 NFSUNLOCKMNT(failnmp); 4642 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4643 failnmp, p); 4644 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4645 failpos, ds); 4646 if (ds != NULL) 4647 nfsrv_killrpcs(failnmp); 4648 NFSLOCKMNT(failnmp); 4649 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4650 wakeup(failnmp); 4651 } 4652 NFSUNLOCKMNT(failnmp); 4653 } 4654 for (i = 0; i < mirrorcnt; i++) 4655 NFSVOPUNLOCK(dvp[i]); 4656 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4657 trycnt); 4658 /* Try the Read/Getattr again if a mirror was deleted. */ 4659 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4660 goto tryagain; 4661 } else { 4662 /* Return ENOENT for any Extended Attribute error. */ 4663 error = ENOENT; 4664 } 4665 free(buf, M_TEMP); 4666 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4667 return (error); 4668 } 4669 4670 /* 4671 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4672 * attribute. 4673 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4674 * to be checked. If it points to a NULL nmp, then it returns 4675 * a suitable destination. 4676 * curnmp - If non-NULL, it is the source mount for the copy. 4677 */ 4678 int 4679 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4680 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4681 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4682 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4683 { 4684 struct vnode *dvp, *nvp = NULL, **tdvpp; 4685 struct mount *mp; 4686 struct nfsmount *nmp, *newnmp; 4687 struct sockaddr *sad; 4688 struct sockaddr_in *sin; 4689 struct nfsdevice *ds, *tds, *fndds; 4690 struct pnfsdsfile *pf; 4691 uint32_t dsdir; 4692 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4693 4694 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4695 *mirrorcntp = 1; 4696 tdvpp = dvpp; 4697 if (nvpp != NULL) 4698 *nvpp = NULL; 4699 if (dvpp != NULL) 4700 *dvpp = NULL; 4701 if (ippos != NULL) 4702 *ippos = -1; 4703 if (newnmpp != NULL) 4704 newnmp = *newnmpp; 4705 else 4706 newnmp = NULL; 4707 mp = vp->v_mount; 4708 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4709 "pnfsd.dsfile", buflenp, buf, p); 4710 mirrorcnt = *buflenp / sizeof(*pf); 4711 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4712 *buflenp != sizeof(*pf) * mirrorcnt)) 4713 error = ENOATTR; 4714 4715 pf = (struct pnfsdsfile *)buf; 4716 /* If curnmp != NULL, check for a match in the mirror list. */ 4717 if (curnmp != NULL && error == 0) { 4718 fnd = 0; 4719 for (i = 0; i < mirrorcnt; i++, pf++) { 4720 sad = (struct sockaddr *)&pf->dsf_sin; 4721 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 4722 if (ippos != NULL) 4723 *ippos = i; 4724 fnd = 1; 4725 break; 4726 } 4727 } 4728 if (fnd == 0) 4729 error = ENXIO; 4730 } 4731 4732 gotone = 0; 4733 pf = (struct pnfsdsfile *)buf; 4734 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 4735 error); 4736 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 4737 fhiszero = 0; 4738 sad = (struct sockaddr *)&pf->dsf_sin; 4739 sin = &pf->dsf_sin; 4740 dsdir = pf->dsf_dir; 4741 if (dsdir >= nfsrv_dsdirsize) { 4742 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 4743 error = ENOATTR; 4744 } else if (nvpp != NULL && newnmp != NULL && 4745 nfsaddr2_match(sad, newnmp->nm_nam)) 4746 error = EEXIST; 4747 if (error == 0) { 4748 if (ippos != NULL && curnmp == NULL && 4749 sad->sa_family == AF_INET && 4750 sin->sin_addr.s_addr == 0) 4751 *ippos = i; 4752 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 4753 fhiszero = 1; 4754 /* Use the socket address to find the mount point. */ 4755 fndds = NULL; 4756 NFSDDSLOCK(); 4757 /* Find a match for the IP address. */ 4758 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 4759 if (ds->nfsdev_nmp != NULL) { 4760 dvp = ds->nfsdev_dvp; 4761 nmp = VFSTONFS(dvp->v_mount); 4762 if (nmp != ds->nfsdev_nmp) 4763 printf("different2 nmp %p %p\n", 4764 nmp, ds->nfsdev_nmp); 4765 if (nfsaddr2_match(sad, nmp->nm_nam)) { 4766 fndds = ds; 4767 break; 4768 } 4769 } 4770 } 4771 if (fndds != NULL && newnmpp != NULL && 4772 newnmp == NULL) { 4773 /* Search for a place to make a mirror copy. */ 4774 TAILQ_FOREACH(tds, &nfsrv_devidhead, 4775 nfsdev_list) { 4776 if (tds->nfsdev_nmp != NULL && 4777 fndds != tds && 4778 ((tds->nfsdev_mdsisset == 0 && 4779 fndds->nfsdev_mdsisset == 0) || 4780 (tds->nfsdev_mdsisset != 0 && 4781 fndds->nfsdev_mdsisset != 0 && 4782 tds->nfsdev_mdsfsid.val[0] == 4783 mp->mnt_stat.f_fsid.val[0] && 4784 tds->nfsdev_mdsfsid.val[1] == 4785 mp->mnt_stat.f_fsid.val[1]))) { 4786 *newnmpp = tds->nfsdev_nmp; 4787 break; 4788 } 4789 } 4790 if (tds != NULL) { 4791 /* 4792 * Move this entry to the end of the 4793 * list, so it won't be selected as 4794 * easily the next time. 4795 */ 4796 TAILQ_REMOVE(&nfsrv_devidhead, tds, 4797 nfsdev_list); 4798 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 4799 nfsdev_list); 4800 } 4801 } 4802 NFSDDSUNLOCK(); 4803 if (fndds != NULL) { 4804 dvp = fndds->nfsdev_dsdir[dsdir]; 4805 if (lktype != 0 || fhiszero != 0 || 4806 (nvpp != NULL && *nvpp == NULL)) { 4807 if (fhiszero != 0) 4808 error = vn_lock(dvp, 4809 LK_EXCLUSIVE); 4810 else if (lktype != 0) 4811 error = vn_lock(dvp, lktype); 4812 else 4813 error = vn_lock(dvp, LK_SHARED); 4814 /* 4815 * If the file handle is all 0's, try to 4816 * do a Lookup against the DS to acquire 4817 * it. 4818 * If dvpp == NULL or the Lookup fails, 4819 * unlock dvp after the call. 4820 */ 4821 if (error == 0 && (fhiszero != 0 || 4822 (nvpp != NULL && *nvpp == NULL))) { 4823 error = nfsrv_pnfslookupds(vp, 4824 dvp, pf, &nvp, p); 4825 if (error == 0) { 4826 if (fhiszero != 0) 4827 nfsrv_pnfssetfh( 4828 vp, pf, 4829 devid, 4830 fnamep, 4831 nvp, p); 4832 if (nvpp != NULL && 4833 *nvpp == NULL) { 4834 *nvpp = nvp; 4835 *dsdirp = dsdir; 4836 } else 4837 vput(nvp); 4838 } 4839 if (error != 0 || lktype == 0) 4840 NFSVOPUNLOCK(dvp); 4841 } 4842 } 4843 if (error == 0) { 4844 gotone++; 4845 NFSD_DEBUG(4, "gotone=%d\n", gotone); 4846 if (devid != NULL) { 4847 NFSBCOPY(fndds->nfsdev_deviceid, 4848 devid, NFSX_V4DEVICEID); 4849 devid += NFSX_V4DEVICEID; 4850 } 4851 if (dvpp != NULL) 4852 *tdvpp++ = dvp; 4853 if (fhp != NULL) 4854 NFSBCOPY(&pf->dsf_fh, fhp++, 4855 NFSX_MYFH); 4856 if (fnamep != NULL && gotone == 1) 4857 strlcpy(fnamep, 4858 pf->dsf_filename, 4859 sizeof(pf->dsf_filename)); 4860 } else 4861 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 4862 "err=%d\n", error); 4863 } 4864 } 4865 } 4866 if (error == 0 && gotone == 0) 4867 error = ENOENT; 4868 4869 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 4870 error); 4871 if (error == 0) 4872 *mirrorcntp = gotone; 4873 else { 4874 if (gotone > 0 && dvpp != NULL) { 4875 /* 4876 * If the error didn't occur on the first one and 4877 * dvpp != NULL, the one(s) prior to the failure will 4878 * have locked dvp's that need to be unlocked. 4879 */ 4880 for (i = 0; i < gotone; i++) { 4881 NFSVOPUNLOCK(*dvpp); 4882 *dvpp++ = NULL; 4883 } 4884 } 4885 /* 4886 * If it found the vnode to be copied from before a failure, 4887 * it needs to be vput()'d. 4888 */ 4889 if (nvpp != NULL && *nvpp != NULL) { 4890 vput(*nvpp); 4891 *nvpp = NULL; 4892 } 4893 } 4894 return (error); 4895 } 4896 4897 /* 4898 * Set the extended attribute for the Change attribute. 4899 */ 4900 static int 4901 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4902 { 4903 struct pnfsdsattr dsattr; 4904 int error; 4905 4906 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 4907 dsattr.dsa_filerev = nap->na_filerev; 4908 dsattr.dsa_size = nap->na_size; 4909 dsattr.dsa_atime = nap->na_atime; 4910 dsattr.dsa_mtime = nap->na_mtime; 4911 dsattr.dsa_bytes = nap->na_bytes; 4912 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4913 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 4914 if (error != 0) 4915 printf("pNFS: setextattr=%d\n", error); 4916 return (error); 4917 } 4918 4919 static int 4920 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 4921 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 4922 { 4923 uint32_t *tl; 4924 struct nfsrv_descript *nd; 4925 nfsv4stateid_t st; 4926 struct mbuf *m, *m2; 4927 int error = 0, retlen, tlen, trimlen; 4928 4929 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 4930 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4931 *mpp = NULL; 4932 /* 4933 * Use a stateid where other is an alternating 01010 pattern and 4934 * seqid is 0xffffffff. This value is not defined as special by 4935 * the RFC and is used by the FreeBSD NFS server to indicate an 4936 * MDS->DS proxy operation. 4937 */ 4938 st.other[0] = 0x55555555; 4939 st.other[1] = 0x55555555; 4940 st.other[2] = 0x55555555; 4941 st.seqid = 0xffffffff; 4942 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 4943 NULL, NULL, 0, 0); 4944 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 4945 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 4946 txdr_hyper(off, tl); 4947 *(tl + 2) = txdr_unsigned(len); 4948 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 4949 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 4950 if (error != 0) { 4951 free(nd, M_TEMP); 4952 return (error); 4953 } 4954 if (nd->nd_repstat == 0) { 4955 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4956 NFSM_STRSIZ(retlen, len); 4957 if (retlen > 0) { 4958 /* Trim off the pre-data XDR from the mbuf chain. */ 4959 m = nd->nd_mrep; 4960 while (m != NULL && m != nd->nd_md) { 4961 if (m->m_next == nd->nd_md) { 4962 m->m_next = NULL; 4963 m_freem(nd->nd_mrep); 4964 nd->nd_mrep = m = nd->nd_md; 4965 } else 4966 m = m->m_next; 4967 } 4968 if (m == NULL) { 4969 printf("nfsrv_readdsrpc: busted mbuf list\n"); 4970 error = ENOENT; 4971 goto nfsmout; 4972 } 4973 4974 /* 4975 * Now, adjust first mbuf so that any XDR before the 4976 * read data is skipped over. 4977 */ 4978 trimlen = nd->nd_dpos - mtod(m, char *); 4979 if (trimlen > 0) { 4980 m->m_len -= trimlen; 4981 NFSM_DATAP(m, trimlen); 4982 } 4983 4984 /* 4985 * Truncate the mbuf chain at retlen bytes of data, 4986 * plus XDR padding that brings the length up to a 4987 * multiple of 4. 4988 */ 4989 tlen = NFSM_RNDUP(retlen); 4990 do { 4991 if (m->m_len >= tlen) { 4992 m->m_len = tlen; 4993 tlen = 0; 4994 m2 = m->m_next; 4995 m->m_next = NULL; 4996 m_freem(m2); 4997 break; 4998 } 4999 tlen -= m->m_len; 5000 m = m->m_next; 5001 } while (m != NULL); 5002 if (tlen > 0) { 5003 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5004 error = ENOENT; 5005 goto nfsmout; 5006 } 5007 *mpp = nd->nd_mrep; 5008 *mpendp = m; 5009 nd->nd_mrep = NULL; 5010 } 5011 } else 5012 error = nd->nd_repstat; 5013 nfsmout: 5014 /* If nd->nd_mrep is already NULL, this is a no-op. */ 5015 m_freem(nd->nd_mrep); 5016 free(nd, M_TEMP); 5017 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 5018 return (error); 5019 } 5020 5021 /* 5022 * Do a write RPC on a DS data file, using this structure for the arguments, 5023 * so that this function can be executed by a separate kernel process. 5024 */ 5025 struct nfsrvwritedsdorpc { 5026 int done; 5027 int inprog; 5028 struct task tsk; 5029 fhandle_t fh; 5030 off_t off; 5031 int len; 5032 struct nfsmount *nmp; 5033 struct ucred *cred; 5034 NFSPROC_T *p; 5035 struct mbuf *m; 5036 int err; 5037 }; 5038 5039 static int 5040 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 5041 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 5042 { 5043 uint32_t *tl; 5044 struct nfsrv_descript *nd; 5045 nfsattrbit_t attrbits; 5046 nfsv4stateid_t st; 5047 int commit, error, retlen; 5048 5049 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5050 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 5051 sizeof(fhandle_t), NULL, NULL, 0, 0); 5052 5053 /* 5054 * Use a stateid where other is an alternating 01010 pattern and 5055 * seqid is 0xffffffff. This value is not defined as special by 5056 * the RFC and is used by the FreeBSD NFS server to indicate an 5057 * MDS->DS proxy operation. 5058 */ 5059 st.other[0] = 0x55555555; 5060 st.other[1] = 0x55555555; 5061 st.other[2] = 0x55555555; 5062 st.seqid = 0xffffffff; 5063 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5064 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 5065 txdr_hyper(off, tl); 5066 tl += 2; 5067 /* 5068 * Do all writes FileSync, since the server doesn't hold onto dirty 5069 * buffers. Since clients should be accessing the DS servers directly 5070 * using the pNFS layouts, this just needs to work correctly as a 5071 * fallback. 5072 */ 5073 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 5074 *tl = txdr_unsigned(len); 5075 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 5076 5077 /* Put data in mbuf chain. */ 5078 nd->nd_mb->m_next = m; 5079 5080 /* Set nd_mb and nd_bpos to end of data. */ 5081 while (m->m_next != NULL) 5082 m = m->m_next; 5083 nd->nd_mb = m; 5084 nd->nd_bpos = mtod(m, char *) + m->m_len; 5085 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 5086 5087 /* Do a Getattr for the attributes that change upon writing. */ 5088 NFSZERO_ATTRBIT(&attrbits); 5089 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5090 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5091 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5092 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5093 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5094 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5095 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5096 (void) nfsrv_putattrbit(nd, &attrbits); 5097 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5098 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5099 if (error != 0) { 5100 free(nd, M_TEMP); 5101 return (error); 5102 } 5103 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 5104 /* Get rid of weak cache consistency data for now. */ 5105 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5106 (ND_NFSV4 | ND_V4WCCATTR)) { 5107 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5108 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5109 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 5110 if (error != 0) 5111 goto nfsmout; 5112 /* 5113 * Get rid of Op# and status for next op. 5114 */ 5115 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5116 if (*++tl != 0) 5117 nd->nd_flag |= ND_NOMOREDATA; 5118 } 5119 if (nd->nd_repstat == 0) { 5120 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 5121 retlen = fxdr_unsigned(int, *tl++); 5122 commit = fxdr_unsigned(int, *tl); 5123 if (commit != NFSWRITE_FILESYNC) 5124 error = NFSERR_IO; 5125 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 5126 retlen, commit, error); 5127 } else 5128 error = nd->nd_repstat; 5129 /* We have no use for the Write Verifier since we use FileSync. */ 5130 5131 /* 5132 * Get the Change, Size, Access Time and Modify Time attributes and set 5133 * on the Metadata file, so its attributes will be what the file's 5134 * would be if it had been written. 5135 */ 5136 if (error == 0) { 5137 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5138 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5139 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5140 } 5141 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 5142 nfsmout: 5143 m_freem(nd->nd_mrep); 5144 free(nd, M_TEMP); 5145 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 5146 return (error); 5147 } 5148 5149 /* 5150 * Start up the thread that will execute nfsrv_writedsdorpc(). 5151 */ 5152 static void 5153 start_writedsdorpc(void *arg, int pending) 5154 { 5155 struct nfsrvwritedsdorpc *drpc; 5156 5157 drpc = (struct nfsrvwritedsdorpc *)arg; 5158 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5159 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5160 drpc->done = 1; 5161 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5162 } 5163 5164 static int 5165 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5166 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5167 struct mbuf **mpp, char *cp, int *failposp) 5168 { 5169 struct nfsrvwritedsdorpc *drpc, *tdrpc = NULL; 5170 struct nfsvattr na; 5171 struct mbuf *m; 5172 int error, i, offs, ret, timo; 5173 5174 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5175 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5176 drpc = NULL; 5177 if (mirrorcnt > 1) 5178 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5179 M_WAITOK); 5180 5181 /* Calculate offset in mbuf chain that data starts. */ 5182 offs = cp - mtod(*mpp, char *); 5183 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5184 5185 /* 5186 * Do the write RPC for every DS, using a separate kernel process 5187 * for every DS except the last one. 5188 */ 5189 error = 0; 5190 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5191 tdrpc->done = 0; 5192 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5193 tdrpc->off = off; 5194 tdrpc->len = len; 5195 tdrpc->nmp = *nmpp; 5196 tdrpc->cred = cred; 5197 tdrpc->p = p; 5198 tdrpc->inprog = 0; 5199 tdrpc->err = 0; 5200 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5201 ret = EIO; 5202 if (nfs_pnfsiothreads != 0) { 5203 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5204 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5205 ret); 5206 } 5207 if (ret != 0) { 5208 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5209 tdrpc->m, cred, p); 5210 if (nfsds_failerr(ret) && *failposp == -1) 5211 *failposp = i; 5212 else if (error == 0 && ret != 0) 5213 error = ret; 5214 } 5215 nmpp++; 5216 fhp++; 5217 } 5218 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5219 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5220 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5221 *failposp = mirrorcnt - 1; 5222 else if (error == 0 && ret != 0) 5223 error = ret; 5224 if (error == 0) 5225 error = nfsrv_setextattr(vp, &na, p); 5226 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5227 tdrpc = drpc; 5228 timo = hz / 50; /* Wait for 20msec. */ 5229 if (timo < 1) 5230 timo = 1; 5231 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5232 /* Wait for RPCs on separate threads to complete. */ 5233 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5234 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5235 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5236 *failposp = i; 5237 else if (error == 0 && tdrpc->err != 0) 5238 error = tdrpc->err; 5239 } 5240 free(drpc, M_TEMP); 5241 return (error); 5242 } 5243 5244 /* 5245 * Do a allocate RPC on a DS data file, using this structure for the arguments, 5246 * so that this function can be executed by a separate kernel process. 5247 */ 5248 struct nfsrvallocatedsdorpc { 5249 int done; 5250 int inprog; 5251 struct task tsk; 5252 fhandle_t fh; 5253 off_t off; 5254 off_t len; 5255 struct nfsmount *nmp; 5256 struct ucred *cred; 5257 NFSPROC_T *p; 5258 int err; 5259 }; 5260 5261 static int 5262 nfsrv_allocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5263 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5264 { 5265 uint32_t *tl; 5266 struct nfsrv_descript *nd; 5267 nfsattrbit_t attrbits; 5268 nfsv4stateid_t st; 5269 int error; 5270 5271 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5272 nfscl_reqstart(nd, NFSPROC_ALLOCATE, nmp, (u_int8_t *)fhp, 5273 sizeof(fhandle_t), NULL, NULL, 0, 0); 5274 5275 /* 5276 * Use a stateid where other is an alternating 01010 pattern and 5277 * seqid is 0xffffffff. This value is not defined as special by 5278 * the RFC and is used by the FreeBSD NFS server to indicate an 5279 * MDS->DS proxy operation. 5280 */ 5281 st.other[0] = 0x55555555; 5282 st.other[1] = 0x55555555; 5283 st.other[2] = 0x55555555; 5284 st.seqid = 0xffffffff; 5285 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5286 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5287 txdr_hyper(off, tl); tl += 2; 5288 txdr_hyper(len, tl); tl += 2; 5289 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: len=%jd\n", (intmax_t)len); 5290 5291 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5292 NFSGETATTR_ATTRBIT(&attrbits); 5293 nfsrv_putattrbit(nd, &attrbits); 5294 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5295 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5296 if (error != 0) { 5297 free(nd, M_TEMP); 5298 return (error); 5299 } 5300 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft allocaterpc=%d\n", 5301 nd->nd_repstat); 5302 if (nd->nd_repstat == 0) { 5303 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5304 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5305 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5306 } else 5307 error = nd->nd_repstat; 5308 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft loadattr=%d\n", error); 5309 nfsmout: 5310 m_freem(nd->nd_mrep); 5311 free(nd, M_TEMP); 5312 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc error=%d\n", error); 5313 return (error); 5314 } 5315 5316 /* 5317 * Start up the thread that will execute nfsrv_allocatedsdorpc(). 5318 */ 5319 static void 5320 start_allocatedsdorpc(void *arg, int pending) 5321 { 5322 struct nfsrvallocatedsdorpc *drpc; 5323 5324 drpc = (struct nfsrvallocatedsdorpc *)arg; 5325 drpc->err = nfsrv_allocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5326 drpc->len, NULL, drpc->cred, drpc->p); 5327 drpc->done = 1; 5328 NFSD_DEBUG(4, "start_allocatedsdorpc: err=%d\n", drpc->err); 5329 } 5330 5331 static int 5332 nfsrv_allocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5333 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5334 int *failposp) 5335 { 5336 struct nfsrvallocatedsdorpc *drpc, *tdrpc = NULL; 5337 struct nfsvattr na; 5338 int error, i, ret, timo; 5339 5340 NFSD_DEBUG(4, "in nfsrv_allocatedsrpc\n"); 5341 drpc = NULL; 5342 if (mirrorcnt > 1) 5343 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5344 M_WAITOK); 5345 5346 /* 5347 * Do the allocate RPC for every DS, using a separate kernel process 5348 * for every DS except the last one. 5349 */ 5350 error = 0; 5351 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5352 tdrpc->done = 0; 5353 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5354 tdrpc->off = off; 5355 tdrpc->len = len; 5356 tdrpc->nmp = *nmpp; 5357 tdrpc->cred = cred; 5358 tdrpc->p = p; 5359 tdrpc->inprog = 0; 5360 tdrpc->err = 0; 5361 ret = EIO; 5362 if (nfs_pnfsiothreads != 0) { 5363 ret = nfs_pnfsio(start_allocatedsdorpc, tdrpc); 5364 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: nfs_pnfsio=%d\n", 5365 ret); 5366 } 5367 if (ret != 0) { 5368 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, NULL, 5369 cred, p); 5370 if (nfsds_failerr(ret) && *failposp == -1) 5371 *failposp = i; 5372 else if (error == 0 && ret != 0) 5373 error = ret; 5374 } 5375 nmpp++; 5376 fhp++; 5377 } 5378 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5379 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5380 *failposp = mirrorcnt - 1; 5381 else if (error == 0 && ret != 0) 5382 error = ret; 5383 if (error == 0) 5384 error = nfsrv_setextattr(vp, &na, p); 5385 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: aft setextat=%d\n", error); 5386 tdrpc = drpc; 5387 timo = hz / 50; /* Wait for 20msec. */ 5388 if (timo < 1) 5389 timo = 1; 5390 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5391 /* Wait for RPCs on separate threads to complete. */ 5392 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5393 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5394 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5395 *failposp = i; 5396 else if (error == 0 && tdrpc->err != 0) 5397 error = tdrpc->err; 5398 } 5399 free(drpc, M_TEMP); 5400 return (error); 5401 } 5402 5403 static int 5404 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5405 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5406 struct nfsvattr *dsnap) 5407 { 5408 uint32_t *tl; 5409 struct nfsrv_descript *nd; 5410 nfsv4stateid_t st; 5411 nfsattrbit_t attrbits; 5412 int error; 5413 5414 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5415 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5416 /* 5417 * Use a stateid where other is an alternating 01010 pattern and 5418 * seqid is 0xffffffff. This value is not defined as special by 5419 * the RFC and is used by the FreeBSD NFS server to indicate an 5420 * MDS->DS proxy operation. 5421 */ 5422 st.other[0] = 0x55555555; 5423 st.other[1] = 0x55555555; 5424 st.other[2] = 0x55555555; 5425 st.seqid = 0xffffffff; 5426 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5427 NULL, NULL, 0, 0); 5428 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5429 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5430 5431 /* Do a Getattr for the attributes that change due to writing. */ 5432 NFSZERO_ATTRBIT(&attrbits); 5433 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5434 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5435 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5436 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5437 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5438 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5439 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5440 (void) nfsrv_putattrbit(nd, &attrbits); 5441 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5442 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5443 if (error != 0) { 5444 free(nd, M_TEMP); 5445 return (error); 5446 } 5447 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5448 nd->nd_repstat); 5449 /* Get rid of weak cache consistency data for now. */ 5450 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5451 (ND_NFSV4 | ND_V4WCCATTR)) { 5452 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5453 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5454 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5455 if (error != 0) 5456 goto nfsmout; 5457 /* 5458 * Get rid of Op# and status for next op. 5459 */ 5460 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5461 if (*++tl != 0) 5462 nd->nd_flag |= ND_NOMOREDATA; 5463 } 5464 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5465 if (error != 0) 5466 goto nfsmout; 5467 if (nd->nd_repstat != 0) 5468 error = nd->nd_repstat; 5469 /* 5470 * Get the Change, Size, Access Time and Modify Time attributes and set 5471 * on the Metadata file, so its attributes will be what the file's 5472 * would be if it had been written. 5473 */ 5474 if (error == 0) { 5475 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5476 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5477 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5478 } 5479 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5480 nfsmout: 5481 m_freem(nd->nd_mrep); 5482 free(nd, M_TEMP); 5483 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5484 return (error); 5485 } 5486 5487 struct nfsrvsetattrdsdorpc { 5488 int done; 5489 int inprog; 5490 struct task tsk; 5491 fhandle_t fh; 5492 struct nfsmount *nmp; 5493 struct vnode *vp; 5494 struct ucred *cred; 5495 NFSPROC_T *p; 5496 struct nfsvattr na; 5497 struct nfsvattr dsna; 5498 int err; 5499 }; 5500 5501 /* 5502 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5503 */ 5504 static void 5505 start_setattrdsdorpc(void *arg, int pending) 5506 { 5507 struct nfsrvsetattrdsdorpc *drpc; 5508 5509 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5510 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5511 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5512 drpc->done = 1; 5513 } 5514 5515 static int 5516 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5517 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5518 struct nfsvattr *nap, int *failposp) 5519 { 5520 struct nfsrvsetattrdsdorpc *drpc, *tdrpc = NULL; 5521 struct nfsvattr na; 5522 int error, i, ret, timo; 5523 5524 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5525 drpc = NULL; 5526 if (mirrorcnt > 1) 5527 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5528 M_WAITOK); 5529 5530 /* 5531 * Do the setattr RPC for every DS, using a separate kernel process 5532 * for every DS except the last one. 5533 */ 5534 error = 0; 5535 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5536 tdrpc->done = 0; 5537 tdrpc->inprog = 0; 5538 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5539 tdrpc->nmp = *nmpp; 5540 tdrpc->vp = vp; 5541 tdrpc->cred = cred; 5542 tdrpc->p = p; 5543 tdrpc->na = *nap; 5544 tdrpc->err = 0; 5545 ret = EIO; 5546 if (nfs_pnfsiothreads != 0) { 5547 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 5548 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 5549 ret); 5550 } 5551 if (ret != 0) { 5552 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 5553 &na); 5554 if (nfsds_failerr(ret) && *failposp == -1) 5555 *failposp = i; 5556 else if (error == 0 && ret != 0) 5557 error = ret; 5558 } 5559 nmpp++; 5560 fhp++; 5561 } 5562 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 5563 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5564 *failposp = mirrorcnt - 1; 5565 else if (error == 0 && ret != 0) 5566 error = ret; 5567 if (error == 0) 5568 error = nfsrv_setextattr(vp, &na, p); 5569 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 5570 tdrpc = drpc; 5571 timo = hz / 50; /* Wait for 20msec. */ 5572 if (timo < 1) 5573 timo = 1; 5574 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5575 /* Wait for RPCs on separate threads to complete. */ 5576 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5577 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 5578 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5579 *failposp = i; 5580 else if (error == 0 && tdrpc->err != 0) 5581 error = tdrpc->err; 5582 } 5583 free(drpc, M_TEMP); 5584 return (error); 5585 } 5586 5587 /* 5588 * Do a Setattr of an NFSv4 ACL on the DS file. 5589 */ 5590 static int 5591 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5592 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 5593 { 5594 struct nfsrv_descript *nd; 5595 nfsv4stateid_t st; 5596 nfsattrbit_t attrbits; 5597 int error; 5598 5599 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 5600 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5601 /* 5602 * Use a stateid where other is an alternating 01010 pattern and 5603 * seqid is 0xffffffff. This value is not defined as special by 5604 * the RFC and is used by the FreeBSD NFS server to indicate an 5605 * MDS->DS proxy operation. 5606 */ 5607 st.other[0] = 0x55555555; 5608 st.other[1] = 0x55555555; 5609 st.other[2] = 0x55555555; 5610 st.seqid = 0xffffffff; 5611 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5612 NULL, NULL, 0, 0); 5613 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5614 NFSZERO_ATTRBIT(&attrbits); 5615 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 5616 /* 5617 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 5618 * so passing in the metadata "vp" will be ok, since it is of 5619 * the same type (VREG). 5620 */ 5621 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 5622 NULL, 0, 0, 0, 0, 0, NULL); 5623 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5624 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5625 if (error != 0) { 5626 free(nd, M_TEMP); 5627 return (error); 5628 } 5629 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 5630 nd->nd_repstat); 5631 error = nd->nd_repstat; 5632 m_freem(nd->nd_mrep); 5633 free(nd, M_TEMP); 5634 return (error); 5635 } 5636 5637 struct nfsrvsetacldsdorpc { 5638 int done; 5639 int inprog; 5640 struct task tsk; 5641 fhandle_t fh; 5642 struct nfsmount *nmp; 5643 struct vnode *vp; 5644 struct ucred *cred; 5645 NFSPROC_T *p; 5646 struct acl *aclp; 5647 int err; 5648 }; 5649 5650 /* 5651 * Start up the thread that will execute nfsrv_setacldsdorpc(). 5652 */ 5653 static void 5654 start_setacldsdorpc(void *arg, int pending) 5655 { 5656 struct nfsrvsetacldsdorpc *drpc; 5657 5658 drpc = (struct nfsrvsetacldsdorpc *)arg; 5659 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 5660 drpc->vp, drpc->nmp, drpc->aclp); 5661 drpc->done = 1; 5662 } 5663 5664 static int 5665 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5666 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 5667 int *failposp) 5668 { 5669 struct nfsrvsetacldsdorpc *drpc, *tdrpc = NULL; 5670 int error, i, ret, timo; 5671 5672 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 5673 drpc = NULL; 5674 if (mirrorcnt > 1) 5675 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5676 M_WAITOK); 5677 5678 /* 5679 * Do the setattr RPC for every DS, using a separate kernel process 5680 * for every DS except the last one. 5681 */ 5682 error = 0; 5683 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5684 tdrpc->done = 0; 5685 tdrpc->inprog = 0; 5686 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5687 tdrpc->nmp = *nmpp; 5688 tdrpc->vp = vp; 5689 tdrpc->cred = cred; 5690 tdrpc->p = p; 5691 tdrpc->aclp = aclp; 5692 tdrpc->err = 0; 5693 ret = EIO; 5694 if (nfs_pnfsiothreads != 0) { 5695 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 5696 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 5697 ret); 5698 } 5699 if (ret != 0) { 5700 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 5701 aclp); 5702 if (nfsds_failerr(ret) && *failposp == -1) 5703 *failposp = i; 5704 else if (error == 0 && ret != 0) 5705 error = ret; 5706 } 5707 nmpp++; 5708 fhp++; 5709 } 5710 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 5711 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5712 *failposp = mirrorcnt - 1; 5713 else if (error == 0 && ret != 0) 5714 error = ret; 5715 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 5716 tdrpc = drpc; 5717 timo = hz / 50; /* Wait for 20msec. */ 5718 if (timo < 1) 5719 timo = 1; 5720 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5721 /* Wait for RPCs on separate threads to complete. */ 5722 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5723 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 5724 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5725 *failposp = i; 5726 else if (error == 0 && tdrpc->err != 0) 5727 error = tdrpc->err; 5728 } 5729 free(drpc, M_TEMP); 5730 return (error); 5731 } 5732 5733 /* 5734 * Getattr call to the DS for the attributes that change due to writing. 5735 */ 5736 static int 5737 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5738 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 5739 { 5740 struct nfsrv_descript *nd; 5741 int error; 5742 nfsattrbit_t attrbits; 5743 5744 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 5745 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5746 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 5747 sizeof(fhandle_t), NULL, NULL, 0, 0); 5748 NFSZERO_ATTRBIT(&attrbits); 5749 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5750 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5751 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5752 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5753 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5754 (void) nfsrv_putattrbit(nd, &attrbits); 5755 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5756 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5757 if (error != 0) { 5758 free(nd, M_TEMP); 5759 return (error); 5760 } 5761 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 5762 nd->nd_repstat); 5763 if (nd->nd_repstat == 0) { 5764 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 5765 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 5766 NULL, NULL); 5767 /* 5768 * We can only save the updated values in the extended 5769 * attribute if the vp is exclusively locked. 5770 * This should happen when any of the following operations 5771 * occur on the vnode: 5772 * Close, Delegreturn, LayoutCommit, LayoutReturn 5773 * As such, the updated extended attribute should get saved 5774 * before nfsrv_checkdsattr() returns 0 and allows the cached 5775 * attributes to be returned without calling this function. 5776 */ 5777 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 5778 error = nfsrv_setextattr(vp, nap, p); 5779 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 5780 error); 5781 } 5782 } else 5783 error = nd->nd_repstat; 5784 m_freem(nd->nd_mrep); 5785 free(nd, M_TEMP); 5786 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 5787 return (error); 5788 } 5789 5790 /* 5791 * Seek call to a DS. 5792 */ 5793 static int 5794 nfsrv_seekdsrpc(fhandle_t *fhp, off_t *offp, int content, bool *eofp, 5795 struct ucred *cred, NFSPROC_T *p, struct nfsmount *nmp) 5796 { 5797 uint32_t *tl; 5798 struct nfsrv_descript *nd; 5799 nfsv4stateid_t st; 5800 int error; 5801 5802 NFSD_DEBUG(4, "in nfsrv_seekdsrpc\n"); 5803 /* 5804 * Use a stateid where other is an alternating 01010 pattern and 5805 * seqid is 0xffffffff. This value is not defined as special by 5806 * the RFC and is used by the FreeBSD NFS server to indicate an 5807 * MDS->DS proxy operation. 5808 */ 5809 st.other[0] = 0x55555555; 5810 st.other[1] = 0x55555555; 5811 st.other[2] = 0x55555555; 5812 st.seqid = 0xffffffff; 5813 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5814 nfscl_reqstart(nd, NFSPROC_SEEKDS, nmp, (u_int8_t *)fhp, 5815 sizeof(fhandle_t), NULL, NULL, 0, 0); 5816 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5817 NFSM_BUILD(tl, uint32_t *, NFSX_HYPER + NFSX_UNSIGNED); 5818 txdr_hyper(*offp, tl); tl += 2; 5819 *tl = txdr_unsigned(content); 5820 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5821 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5822 if (error != 0) { 5823 free(nd, M_TEMP); 5824 return (error); 5825 } 5826 NFSD_DEBUG(4, "nfsrv_seekdsrpc: aft seekrpc=%d\n", nd->nd_repstat); 5827 if (nd->nd_repstat == 0) { 5828 NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED + NFSX_HYPER); 5829 if (*tl++ == newnfs_true) 5830 *eofp = true; 5831 else 5832 *eofp = false; 5833 *offp = fxdr_hyper(tl); 5834 } else 5835 error = nd->nd_repstat; 5836 nfsmout: 5837 m_freem(nd->nd_mrep); 5838 free(nd, M_TEMP); 5839 NFSD_DEBUG(4, "nfsrv_seekdsrpc error=%d\n", error); 5840 return (error); 5841 } 5842 5843 /* 5844 * Get the device id and file handle for a DS file. 5845 */ 5846 int 5847 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 5848 fhandle_t *fhp, char *devid) 5849 { 5850 int buflen, error; 5851 char *buf; 5852 5853 buflen = 1024; 5854 buf = malloc(buflen, M_TEMP, M_WAITOK); 5855 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 5856 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 5857 free(buf, M_TEMP); 5858 return (error); 5859 } 5860 5861 /* 5862 * Do a Lookup against the DS for the filename. 5863 */ 5864 static int 5865 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 5866 struct vnode **nvpp, NFSPROC_T *p) 5867 { 5868 struct nameidata named; 5869 struct ucred *tcred; 5870 char *bufp; 5871 u_long *hashp; 5872 struct vnode *nvp; 5873 int error; 5874 5875 tcred = newnfs_getcred(); 5876 named.ni_cnd.cn_nameiop = LOOKUP; 5877 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 5878 named.ni_cnd.cn_cred = tcred; 5879 named.ni_cnd.cn_thread = p; 5880 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 5881 nfsvno_setpathbuf(&named, &bufp, &hashp); 5882 named.ni_cnd.cn_nameptr = bufp; 5883 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 5884 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 5885 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 5886 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 5887 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 5888 NFSFREECRED(tcred); 5889 nfsvno_relpathbuf(&named); 5890 if (error == 0) 5891 *nvpp = nvp; 5892 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 5893 return (error); 5894 } 5895 5896 /* 5897 * Set the file handle to the correct one. 5898 */ 5899 static void 5900 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 5901 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 5902 { 5903 struct nfsnode *np; 5904 int ret = 0; 5905 5906 np = VTONFS(nvp); 5907 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 5908 /* 5909 * We can only do a vn_set_extattr() if the vnode is exclusively 5910 * locked and vn_start_write() has been done. If devid != NULL or 5911 * fnamep != NULL or the vnode is shared locked, vn_start_write() 5912 * may not have been done. 5913 * If not done now, it will be done on a future call. 5914 */ 5915 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 5916 LK_EXCLUSIVE) 5917 ret = vn_extattr_set(vp, IO_NODELOCKED, 5918 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 5919 (char *)pf, p); 5920 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 5921 } 5922 5923 /* 5924 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 5925 * when the DS has failed. 5926 */ 5927 void 5928 nfsrv_killrpcs(struct nfsmount *nmp) 5929 { 5930 5931 /* 5932 * Call newnfs_nmcancelreqs() to cause 5933 * any RPCs in progress on the mount point to 5934 * fail. 5935 * This will cause any process waiting for an 5936 * RPC to complete while holding a vnode lock 5937 * on the mounted-on vnode (such as "df" or 5938 * a non-forced "umount") to fail. 5939 * This will unlock the mounted-on vnode so 5940 * a forced dismount can succeed. 5941 * The NFSMNTP_CANCELRPCS flag should be set when this function is 5942 * called. 5943 */ 5944 newnfs_nmcancelreqs(nmp); 5945 } 5946 5947 /* 5948 * Sum up the statfs info for each of the DSs, so that the client will 5949 * receive the total for all DSs. 5950 */ 5951 static int 5952 nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp) 5953 { 5954 struct statfs *tsf; 5955 struct nfsdevice *ds; 5956 struct vnode **dvpp, **tdvpp, *dvp; 5957 uint64_t tot; 5958 int cnt, error = 0, i; 5959 5960 if (nfsrv_devidcnt <= 0) 5961 return (ENXIO); 5962 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 5963 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 5964 5965 /* Get an array of the dvps for the DSs. */ 5966 tdvpp = dvpp; 5967 i = 0; 5968 NFSDDSLOCK(); 5969 /* First, search for matches for same file system. */ 5970 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5971 if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 && 5972 ds->nfsdev_mdsfsid.val[0] == mp->mnt_stat.f_fsid.val[0] && 5973 ds->nfsdev_mdsfsid.val[1] == mp->mnt_stat.f_fsid.val[1]) { 5974 if (++i > nfsrv_devidcnt) 5975 break; 5976 *tdvpp++ = ds->nfsdev_dvp; 5977 } 5978 } 5979 /* 5980 * If no matches for same file system, total all servers not assigned 5981 * to a file system. 5982 */ 5983 if (i == 0) { 5984 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5985 if (ds->nfsdev_nmp != NULL && 5986 ds->nfsdev_mdsisset == 0) { 5987 if (++i > nfsrv_devidcnt) 5988 break; 5989 *tdvpp++ = ds->nfsdev_dvp; 5990 } 5991 } 5992 } 5993 NFSDDSUNLOCK(); 5994 cnt = i; 5995 5996 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 5997 tdvpp = dvpp; 5998 for (i = 0; i < cnt && error == 0; i++) { 5999 dvp = *tdvpp++; 6000 error = VFS_STATFS(dvp->v_mount, tsf); 6001 if (error == 0) { 6002 if (sf->f_bsize == 0) { 6003 if (tsf->f_bsize > 0) 6004 sf->f_bsize = tsf->f_bsize; 6005 else 6006 sf->f_bsize = 8192; 6007 } 6008 if (tsf->f_blocks > 0) { 6009 if (sf->f_bsize != tsf->f_bsize) { 6010 tot = tsf->f_blocks * tsf->f_bsize; 6011 sf->f_blocks += (tot / sf->f_bsize); 6012 } else 6013 sf->f_blocks += tsf->f_blocks; 6014 } 6015 if (tsf->f_bfree > 0) { 6016 if (sf->f_bsize != tsf->f_bsize) { 6017 tot = tsf->f_bfree * tsf->f_bsize; 6018 sf->f_bfree += (tot / sf->f_bsize); 6019 } else 6020 sf->f_bfree += tsf->f_bfree; 6021 } 6022 if (tsf->f_bavail > 0) { 6023 if (sf->f_bsize != tsf->f_bsize) { 6024 tot = tsf->f_bavail * tsf->f_bsize; 6025 sf->f_bavail += (tot / sf->f_bsize); 6026 } else 6027 sf->f_bavail += tsf->f_bavail; 6028 } 6029 } 6030 } 6031 free(tsf, M_TEMP); 6032 free(dvpp, M_TEMP); 6033 return (error); 6034 } 6035 6036 /* 6037 * Set an NFSv4 acl. 6038 */ 6039 int 6040 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 6041 { 6042 int error; 6043 6044 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 6045 error = NFSERR_ATTRNOTSUPP; 6046 goto out; 6047 } 6048 /* 6049 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 6050 * Make sure it has enough room for that - splitting every entry 6051 * into two and appending "canonical six" entries at the end. 6052 * Cribbed out of kern/vfs_acl.c - Rick M. 6053 */ 6054 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 6055 error = NFSERR_ATTRNOTSUPP; 6056 goto out; 6057 } 6058 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 6059 if (error == 0) { 6060 error = nfsrv_dssetacl(vp, aclp, cred, p); 6061 if (error == ENOENT) 6062 error = 0; 6063 } 6064 6065 out: 6066 NFSEXITCODE(error); 6067 return (error); 6068 } 6069 6070 /* 6071 * Seek vnode op call (actually it is a VOP_IOCTL()). 6072 * This function is called with the vnode locked, but unlocks and vrele()s 6073 * the vp before returning. 6074 */ 6075 int 6076 nfsvno_seek(struct nfsrv_descript *nd, struct vnode *vp, u_long cmd, 6077 off_t *offp, int content, bool *eofp, struct ucred *cred, NFSPROC_T *p) 6078 { 6079 struct nfsvattr at; 6080 int error, ret; 6081 6082 ASSERT_VOP_LOCKED(vp, "nfsvno_seek vp"); 6083 /* 6084 * Attempt to seek on a DS file. A return of ENOENT implies 6085 * there is no DS file to seek on. 6086 */ 6087 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SEEKDS, NULL, 6088 NULL, NULL, NULL, NULL, offp, content, eofp); 6089 if (error != ENOENT) { 6090 vput(vp); 6091 return (error); 6092 } 6093 6094 /* 6095 * Do the VOP_IOCTL() call. For the case where *offp == file_size, 6096 * VOP_IOCTL() will return ENXIO. However, the correct reply for 6097 * NFSv4.2 is *eofp == true and error == 0 for this case. 6098 */ 6099 NFSVOPUNLOCK(vp); 6100 error = VOP_IOCTL(vp, cmd, offp, 0, cred, p); 6101 *eofp = false; 6102 if (error == ENXIO || (error == 0 && cmd == FIOSEEKHOLE)) { 6103 /* Handle the cases where we might be at EOF. */ 6104 ret = nfsvno_getattr(vp, &at, nd, p, 0, NULL); 6105 if (ret == 0 && *offp == at.na_size) { 6106 *eofp = true; 6107 error = 0; 6108 } 6109 if (ret != 0 && error == 0) 6110 error = ret; 6111 } 6112 vrele(vp); 6113 NFSEXITCODE(error); 6114 return (error); 6115 } 6116 6117 /* 6118 * Allocate vnode op call. 6119 */ 6120 int 6121 nfsvno_allocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6122 NFSPROC_T *p) 6123 { 6124 int error, trycnt; 6125 6126 ASSERT_VOP_ELOCKED(vp, "nfsvno_allocate vp"); 6127 /* 6128 * Attempt to allocate on a DS file. A return of ENOENT implies 6129 * there is no DS file to allocate on. 6130 */ 6131 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_ALLOCATE, NULL, 6132 NULL, NULL, NULL, NULL, &len, 0, NULL); 6133 if (error != ENOENT) 6134 return (error); 6135 error = 0; 6136 6137 /* 6138 * Do the actual VOP_ALLOCATE(), looping a reasonable number of 6139 * times to achieve completion. 6140 */ 6141 trycnt = 0; 6142 while (error == 0 && len > 0 && trycnt++ < 20) 6143 error = VOP_ALLOCATE(vp, &off, &len); 6144 if (error == 0 && len > 0) 6145 error = NFSERR_IO; 6146 NFSEXITCODE(error); 6147 return (error); 6148 } 6149 6150 /* 6151 * Get Extended Atribute vnode op into an mbuf list. 6152 */ 6153 int 6154 nfsvno_getxattr(struct vnode *vp, char *name, uint32_t maxresp, 6155 struct ucred *cred, struct thread *p, struct mbuf **mpp, 6156 struct mbuf **mpendp, int *lenp) 6157 { 6158 struct iovec *iv; 6159 struct uio io, *uiop = &io; 6160 struct mbuf *m, *m2; 6161 int alen, error, len, tlen; 6162 size_t siz; 6163 6164 /* First, find out the size of the extended attribute. */ 6165 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6166 &siz, cred, p); 6167 if (error != 0) 6168 return (NFSERR_NOXATTR); 6169 if (siz > maxresp - NFS_MAXXDR) 6170 return (NFSERR_XATTR2BIG); 6171 len = siz; 6172 tlen = NFSM_RNDUP(len); 6173 if (tlen > 0) { 6174 uiop->uio_iovcnt = nfsrv_createiovec(tlen, &m, &m2, &iv); 6175 uiop->uio_iov = iv; 6176 } else { 6177 uiop->uio_iovcnt = 0; 6178 uiop->uio_iov = iv = NULL; 6179 m = m2 = NULL; 6180 } 6181 uiop->uio_offset = 0; 6182 uiop->uio_resid = tlen; 6183 uiop->uio_rw = UIO_READ; 6184 uiop->uio_segflg = UIO_SYSSPACE; 6185 uiop->uio_td = p; 6186 #ifdef MAC 6187 error = mac_vnode_check_getextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6188 name); 6189 if (error != 0) 6190 goto out; 6191 #endif 6192 6193 if (tlen > 0) 6194 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6195 NULL, cred, p); 6196 if (error != 0) 6197 goto out; 6198 if (uiop->uio_resid > 0) { 6199 alen = tlen; 6200 len = tlen - uiop->uio_resid; 6201 tlen = NFSM_RNDUP(len); 6202 if (alen != tlen) 6203 printf("nfsvno_getxattr: weird size read\n"); 6204 nfsrv_adj(m, alen - tlen, tlen - len); 6205 } 6206 *lenp = len; 6207 *mpp = m; 6208 *mpendp = m2; 6209 6210 out: 6211 if (error != 0) { 6212 if (m != NULL) 6213 m_freem(m); 6214 *lenp = 0; 6215 } 6216 free(iv, M_TEMP); 6217 NFSEXITCODE(error); 6218 return (error); 6219 } 6220 6221 /* 6222 * Set Extended attribute vnode op from an mbuf list. 6223 */ 6224 int 6225 nfsvno_setxattr(struct vnode *vp, char *name, int len, struct mbuf *m, 6226 char *cp, struct ucred *cred, struct thread *p) 6227 { 6228 struct iovec *iv; 6229 struct uio uio, *uiop = &uio; 6230 int cnt, error; 6231 6232 error = 0; 6233 #ifdef MAC 6234 error = mac_vnode_check_setextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6235 name); 6236 #endif 6237 if (error != 0) 6238 goto out; 6239 6240 uiop->uio_rw = UIO_WRITE; 6241 uiop->uio_segflg = UIO_SYSSPACE; 6242 uiop->uio_td = p; 6243 uiop->uio_offset = 0; 6244 uiop->uio_resid = len; 6245 if (len > 0) { 6246 error = nfsrv_createiovecw(len, m, cp, &iv, &cnt); 6247 uiop->uio_iov = iv; 6248 uiop->uio_iovcnt = cnt; 6249 } else { 6250 uiop->uio_iov = iv = NULL; 6251 uiop->uio_iovcnt = 0; 6252 } 6253 if (error == 0) { 6254 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6255 cred, p); 6256 free(iv, M_TEMP); 6257 } 6258 6259 out: 6260 NFSEXITCODE(error); 6261 return (error); 6262 } 6263 6264 /* 6265 * Remove Extended attribute vnode op. 6266 */ 6267 int 6268 nfsvno_rmxattr(struct nfsrv_descript *nd, struct vnode *vp, char *name, 6269 struct ucred *cred, struct thread *p) 6270 { 6271 int error; 6272 6273 /* 6274 * Get rid of any delegations. I am not sure why this is required, 6275 * but RFC-8276 says so. 6276 */ 6277 error = nfsrv_checkremove(vp, 0, nd, nd->nd_clientid, p); 6278 if (error != 0) 6279 goto out; 6280 #ifdef MAC 6281 error = mac_vnode_check_deleteextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6282 name); 6283 if (error != 0) 6284 goto out; 6285 #endif 6286 6287 error = VOP_DELETEEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, cred, p); 6288 if (error == EOPNOTSUPP) 6289 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6290 cred, p); 6291 out: 6292 NFSEXITCODE(error); 6293 return (error); 6294 } 6295 6296 /* 6297 * List Extended Atribute vnode op into an mbuf list. 6298 */ 6299 int 6300 nfsvno_listxattr(struct vnode *vp, uint64_t cookie, struct ucred *cred, 6301 struct thread *p, u_char **bufp, uint32_t *lenp, bool *eofp) 6302 { 6303 struct iovec iv; 6304 struct uio io; 6305 int error; 6306 size_t siz; 6307 6308 *bufp = NULL; 6309 /* First, find out the size of the extended attribute. */ 6310 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, NULL, &siz, cred, 6311 p); 6312 if (error != 0) 6313 return (NFSERR_NOXATTR); 6314 if (siz <= cookie) { 6315 *lenp = 0; 6316 *eofp = true; 6317 goto out; 6318 } 6319 if (siz > cookie + *lenp) { 6320 siz = cookie + *lenp; 6321 *eofp = false; 6322 } else 6323 *eofp = true; 6324 /* Just choose a sanity limit of 10Mbytes for malloc(M_TEMP). */ 6325 if (siz > 10 * 1024 * 1024) { 6326 error = NFSERR_XATTR2BIG; 6327 goto out; 6328 } 6329 *bufp = malloc(siz, M_TEMP, M_WAITOK); 6330 iv.iov_base = *bufp; 6331 iv.iov_len = siz; 6332 io.uio_iovcnt = 1; 6333 io.uio_iov = &iv; 6334 io.uio_offset = 0; 6335 io.uio_resid = siz; 6336 io.uio_rw = UIO_READ; 6337 io.uio_segflg = UIO_SYSSPACE; 6338 io.uio_td = p; 6339 #ifdef MAC 6340 error = mac_vnode_check_listextattr(cred, vp, EXTATTR_NAMESPACE_USER); 6341 if (error != 0) 6342 goto out; 6343 #endif 6344 6345 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, &io, NULL, cred, 6346 p); 6347 if (error != 0) 6348 goto out; 6349 if (io.uio_resid > 0) 6350 siz -= io.uio_resid; 6351 *lenp = siz; 6352 6353 out: 6354 if (error != 0) { 6355 free(*bufp, M_TEMP); 6356 *bufp = NULL; 6357 } 6358 NFSEXITCODE(error); 6359 return (error); 6360 } 6361 6362 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 6363 6364 /* 6365 * Called once to initialize data structures... 6366 */ 6367 static int 6368 nfsd_modevent(module_t mod, int type, void *data) 6369 { 6370 int error = 0, i; 6371 static int loaded = 0; 6372 6373 switch (type) { 6374 case MOD_LOAD: 6375 if (loaded) 6376 goto out; 6377 newnfs_portinit(); 6378 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 6379 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 6380 MTX_DEF); 6381 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 6382 MTX_DEF); 6383 } 6384 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 6385 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 6386 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 6387 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 6388 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 6389 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 6390 nfsrvd_initcache(); 6391 nfsd_init(); 6392 NFSD_LOCK(); 6393 nfsrvd_init(0); 6394 NFSD_UNLOCK(); 6395 nfsd_mntinit(); 6396 #ifdef VV_DISABLEDELEG 6397 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 6398 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 6399 #endif 6400 nfsd_call_servertimer = nfsrv_servertimer; 6401 nfsd_call_nfsd = nfssvc_nfsd; 6402 loaded = 1; 6403 break; 6404 6405 case MOD_UNLOAD: 6406 if (newnfs_numnfsd != 0) { 6407 error = EBUSY; 6408 break; 6409 } 6410 6411 #ifdef VV_DISABLEDELEG 6412 vn_deleg_ops.vndeleg_recall = NULL; 6413 vn_deleg_ops.vndeleg_disable = NULL; 6414 #endif 6415 nfsd_call_servertimer = NULL; 6416 nfsd_call_nfsd = NULL; 6417 6418 /* Clean out all NFSv4 state. */ 6419 nfsrv_throwawayallstate(curthread); 6420 6421 /* Clean the NFS server reply cache */ 6422 nfsrvd_cleancache(); 6423 6424 /* Free up the krpc server pool. */ 6425 if (nfsrvd_pool != NULL) 6426 svcpool_destroy(nfsrvd_pool); 6427 6428 /* and get rid of the locks */ 6429 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 6430 mtx_destroy(&nfsrchash_table[i].mtx); 6431 mtx_destroy(&nfsrcahash_table[i].mtx); 6432 } 6433 mtx_destroy(&nfsrc_udpmtx); 6434 mtx_destroy(&nfs_v4root_mutex); 6435 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 6436 mtx_destroy(&nfsrv_dontlistlock_mtx); 6437 mtx_destroy(&nfsrv_recalllock_mtx); 6438 for (i = 0; i < nfsrv_sessionhashsize; i++) 6439 mtx_destroy(&nfssessionhash[i].mtx); 6440 if (nfslayouthash != NULL) { 6441 for (i = 0; i < nfsrv_layouthashsize; i++) 6442 mtx_destroy(&nfslayouthash[i].mtx); 6443 free(nfslayouthash, M_NFSDSESSION); 6444 } 6445 lockdestroy(&nfsv4root_mnt.mnt_explock); 6446 free(nfsclienthash, M_NFSDCLIENT); 6447 free(nfslockhash, M_NFSDLOCKFILE); 6448 free(nfssessionhash, M_NFSDSESSION); 6449 loaded = 0; 6450 break; 6451 default: 6452 error = EOPNOTSUPP; 6453 break; 6454 } 6455 6456 out: 6457 NFSEXITCODE(error); 6458 return (error); 6459 } 6460 static moduledata_t nfsd_mod = { 6461 "nfsd", 6462 nfsd_modevent, 6463 NULL, 6464 }; 6465 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 6466 6467 /* So that loader and kldload(2) can find us, wherever we are.. */ 6468 MODULE_VERSION(nfsd, 1); 6469 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 6470 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 6471 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 6472 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 6473 6474