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/callout.h> 51 #include <sys/filio.h> 52 #include <sys/hash.h> 53 #include <sys/sysctl.h> 54 #include <nlm/nlm_prot.h> 55 #include <nlm/nlm.h> 56 57 FEATURE(nfsd, "NFSv4 server"); 58 59 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 60 extern int nfsrv_useacl; 61 extern int newnfs_numnfsd; 62 extern struct mount nfsv4root_mnt; 63 extern struct nfsrv_stablefirst nfsrv_stablefirst; 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 extern uint32_t nfs_srvmaxio; 80 extern int nfs_bufpackets; 81 extern u_long sb_max_adj; 82 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt; 83 NFSDLOCKMUTEX; 84 NFSSTATESPINLOCK; 85 struct nfsrchash_bucket nfsrchash_table[NFSRVCACHE_HASHSIZE]; 86 struct nfsrchash_bucket nfsrcahash_table[NFSRVCACHE_HASHSIZE]; 87 struct mtx nfsrc_udpmtx; 88 struct mtx nfs_v4root_mutex; 89 struct mtx nfsrv_dontlistlock_mtx; 90 struct mtx nfsrv_recalllock_mtx; 91 struct nfsrvfh nfs_rootfh, nfs_pubfh; 92 int nfs_pubfhset = 0, nfs_rootfhset = 0; 93 struct proc *nfsd_master_proc = NULL; 94 int nfsd_debuglevel = 0; 95 static pid_t nfsd_master_pid = (pid_t)-1; 96 static char nfsd_master_comm[MAXCOMLEN + 1]; 97 static struct timeval nfsd_master_start; 98 static uint32_t nfsv4_sysid = 0; 99 static fhandle_t zerofh; 100 struct callout nfsd_callout; 101 102 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 103 struct ucred *); 104 static void nfsvno_updateds(struct vnode *, struct ucred *, struct thread *); 105 106 int nfsrv_enable_crossmntpt = 1; 107 static int nfs_commit_blks; 108 static int nfs_commit_miss; 109 extern int nfsrv_issuedelegs; 110 extern int nfsrv_dolocallocks; 111 extern int nfsd_enable_stringtouid; 112 extern struct nfsdevicehead nfsrv_devidhead; 113 114 static int nfsrv_createiovec(int, struct mbuf **, struct mbuf **, 115 struct iovec **); 116 static int nfsrv_createiovec_extpgs(int, int, struct mbuf **, 117 struct mbuf **, struct iovec **); 118 static int nfsrv_createiovecw(int, struct mbuf *, char *, struct iovec **, 119 int *); 120 static void nfsrv_pnfscreate(struct vnode *, struct vattr *, struct ucred *, 121 NFSPROC_T *); 122 static void nfsrv_pnfsremovesetup(struct vnode *, NFSPROC_T *, struct vnode **, 123 int *, char *, fhandle_t *); 124 static void nfsrv_pnfsremove(struct vnode **, int, char *, fhandle_t *, 125 NFSPROC_T *); 126 static int nfsrv_proxyds(struct vnode *, off_t, int, struct ucred *, 127 struct thread *, int, struct mbuf **, char *, struct mbuf **, 128 struct nfsvattr *, struct acl *, off_t *, int, bool *); 129 static int nfsrv_setextattr(struct vnode *, struct nfsvattr *, NFSPROC_T *); 130 static int nfsrv_readdsrpc(fhandle_t *, off_t, int, struct ucred *, 131 NFSPROC_T *, struct nfsmount *, struct mbuf **, struct mbuf **); 132 static int nfsrv_writedsrpc(fhandle_t *, off_t, int, struct ucred *, 133 NFSPROC_T *, struct vnode *, struct nfsmount **, int, struct mbuf **, 134 char *, int *); 135 static int nfsrv_allocatedsrpc(fhandle_t *, off_t, off_t, struct ucred *, 136 NFSPROC_T *, struct vnode *, struct nfsmount **, int, int *); 137 static int nfsrv_deallocatedsrpc(fhandle_t *, off_t, off_t, struct ucred *, 138 NFSPROC_T *, struct vnode *, struct nfsmount **, int, int *); 139 static int nfsrv_setacldsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 140 struct vnode *, struct nfsmount **, int, struct acl *, int *); 141 static int nfsrv_setattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 142 struct vnode *, struct nfsmount **, int, struct nfsvattr *, int *); 143 static int nfsrv_getattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 144 struct vnode *, struct nfsmount *, struct nfsvattr *); 145 static int nfsrv_seekdsrpc(fhandle_t *, off_t *, int, bool *, struct ucred *, 146 NFSPROC_T *, struct nfsmount *); 147 static int nfsrv_putfhname(fhandle_t *, char *); 148 static int nfsrv_pnfslookupds(struct vnode *, struct vnode *, 149 struct pnfsdsfile *, struct vnode **, NFSPROC_T *); 150 static void nfsrv_pnfssetfh(struct vnode *, struct pnfsdsfile *, char *, char *, 151 struct vnode *, NFSPROC_T *); 152 static int nfsrv_dsremove(struct vnode *, char *, struct ucred *, NFSPROC_T *); 153 static int nfsrv_dssetacl(struct vnode *, struct acl *, struct ucred *, 154 NFSPROC_T *); 155 static int nfsrv_pnfsstatfs(struct statfs *, struct mount *); 156 157 int nfs_pnfsio(task_fn_t *, void *); 158 159 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 160 "NFS server"); 161 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 162 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 163 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 164 0, ""); 165 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 166 0, ""); 167 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 168 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 169 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 170 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 171 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 172 0, "Debug level for NFS server"); 173 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 174 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 175 static int nfsrv_pnfsgetdsattr = 1; 176 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsgetdsattr, CTLFLAG_RW, 177 &nfsrv_pnfsgetdsattr, 0, "When set getattr gets DS attributes via RPC"); 178 179 /* 180 * nfsrv_dsdirsize can only be increased and only when the nfsd threads are 181 * not running. 182 * The dsN subdirectories for the increased values must have been created 183 * on all DS servers before this increase is done. 184 */ 185 u_int nfsrv_dsdirsize = 20; 186 static int 187 sysctl_dsdirsize(SYSCTL_HANDLER_ARGS) 188 { 189 int error, newdsdirsize; 190 191 newdsdirsize = nfsrv_dsdirsize; 192 error = sysctl_handle_int(oidp, &newdsdirsize, 0, req); 193 if (error != 0 || req->newptr == NULL) 194 return (error); 195 if (newdsdirsize <= nfsrv_dsdirsize || newdsdirsize > 10000 || 196 newnfs_numnfsd != 0) 197 return (EINVAL); 198 nfsrv_dsdirsize = newdsdirsize; 199 return (0); 200 } 201 SYSCTL_PROC(_vfs_nfsd, OID_AUTO, dsdirsize, 202 CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RW, 0, sizeof(nfsrv_dsdirsize), 203 sysctl_dsdirsize, "IU", "Number of dsN subdirs on the DS servers"); 204 205 /* 206 * nfs_srvmaxio can only be increased and only when the nfsd threads are 207 * not running. The setting must be a power of 2, with the current limit of 208 * 1Mbyte. 209 */ 210 static int 211 sysctl_srvmaxio(SYSCTL_HANDLER_ARGS) 212 { 213 int error; 214 u_int newsrvmaxio; 215 uint64_t tval; 216 217 newsrvmaxio = nfs_srvmaxio; 218 error = sysctl_handle_int(oidp, &newsrvmaxio, 0, req); 219 if (error != 0 || req->newptr == NULL) 220 return (error); 221 if (newsrvmaxio == nfs_srvmaxio) 222 return (0); 223 if (newsrvmaxio < nfs_srvmaxio) { 224 printf("nfsd: vfs.nfsd.srvmaxio can only be increased\n"); 225 return (EINVAL); 226 } 227 if (newsrvmaxio > 1048576) { 228 printf("nfsd: vfs.nfsd.srvmaxio cannot be > 1Mbyte\n"); 229 return (EINVAL); 230 } 231 if ((newsrvmaxio & (newsrvmaxio - 1)) != 0) { 232 printf("nfsd: vfs.nfsd.srvmaxio must be a power of 2\n"); 233 return (EINVAL); 234 } 235 236 /* 237 * Check that kern.ipc.maxsockbuf is large enough for 238 * newsrviomax, given the setting of vfs.nfs.bufpackets. 239 */ 240 if ((newsrvmaxio + NFS_MAXXDR) * nfs_bufpackets > 241 sb_max_adj) { 242 /* 243 * Suggest vfs.nfs.bufpackets * maximum RPC message for 244 * sb_max_adj. 245 */ 246 tval = (newsrvmaxio + NFS_MAXXDR) * nfs_bufpackets; 247 248 /* 249 * Convert suggested sb_max_adj value to a suggested 250 * sb_max value, which is what is set via kern.ipc.maxsockbuf. 251 * Perform the inverse calculation of (from uipc_sockbuf.c): 252 * sb_max_adj = (u_quad_t)sb_max * MCLBYTES / 253 * (MSIZE + MCLBYTES); 254 * XXX If the calculation of sb_max_adj from sb_max changes, 255 * this calculation must be changed as well. 256 */ 257 tval *= (MSIZE + MCLBYTES); /* Brackets for readability. */ 258 tval += MCLBYTES - 1; /* Round up divide. */ 259 tval /= MCLBYTES; 260 printf("nfsd: set kern.ipc.maxsockbuf to a minimum of " 261 "%ju to support %ubyte NFS I/O\n", (uintmax_t)tval, 262 newsrvmaxio); 263 return (EINVAL); 264 } 265 266 NFSD_LOCK(); 267 if (newnfs_numnfsd != 0) { 268 NFSD_UNLOCK(); 269 printf("nfsd: cannot set vfs.nfsd.srvmaxio when nfsd " 270 "threads are running\n"); 271 return (EINVAL); 272 } 273 274 275 nfs_srvmaxio = newsrvmaxio; 276 NFSD_UNLOCK(); 277 return (0); 278 } 279 SYSCTL_PROC(_vfs_nfsd, OID_AUTO, srvmaxio, 280 CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RW, NULL, 0, 281 sysctl_srvmaxio, "IU", "Maximum I/O size in bytes"); 282 283 #define MAX_REORDERED_RPC 16 284 #define NUM_HEURISTIC 1031 285 #define NHUSE_INIT 64 286 #define NHUSE_INC 16 287 #define NHUSE_MAX 2048 288 289 static struct nfsheur { 290 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 291 off_t nh_nextoff; /* next offset for sequential detection */ 292 int nh_use; /* use count for selection */ 293 int nh_seqcount; /* heuristic */ 294 } nfsheur[NUM_HEURISTIC]; 295 296 /* 297 * Heuristic to detect sequential operation. 298 */ 299 static struct nfsheur * 300 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 301 { 302 struct nfsheur *nh; 303 int hi, try; 304 305 /* Locate best candidate. */ 306 try = 32; 307 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 308 nh = &nfsheur[hi]; 309 while (try--) { 310 if (nfsheur[hi].nh_vp == vp) { 311 nh = &nfsheur[hi]; 312 break; 313 } 314 if (nfsheur[hi].nh_use > 0) 315 --nfsheur[hi].nh_use; 316 hi = (hi + 1) % NUM_HEURISTIC; 317 if (nfsheur[hi].nh_use < nh->nh_use) 318 nh = &nfsheur[hi]; 319 } 320 321 /* Initialize hint if this is a new file. */ 322 if (nh->nh_vp != vp) { 323 nh->nh_vp = vp; 324 nh->nh_nextoff = uio->uio_offset; 325 nh->nh_use = NHUSE_INIT; 326 if (uio->uio_offset == 0) 327 nh->nh_seqcount = 4; 328 else 329 nh->nh_seqcount = 1; 330 } 331 332 /* Calculate heuristic. */ 333 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 334 uio->uio_offset == nh->nh_nextoff) { 335 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 336 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 337 if (nh->nh_seqcount > IO_SEQMAX) 338 nh->nh_seqcount = IO_SEQMAX; 339 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 340 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 341 /* Probably a reordered RPC, leave seqcount alone. */ 342 } else if (nh->nh_seqcount > 1) { 343 nh->nh_seqcount /= 2; 344 } else { 345 nh->nh_seqcount = 0; 346 } 347 nh->nh_use += NHUSE_INC; 348 if (nh->nh_use > NHUSE_MAX) 349 nh->nh_use = NHUSE_MAX; 350 return (nh); 351 } 352 353 /* 354 * Get attributes into nfsvattr structure. 355 */ 356 int 357 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, 358 struct nfsrv_descript *nd, struct thread *p, int vpislocked, 359 nfsattrbit_t *attrbitp) 360 { 361 int error, gotattr, lockedit = 0; 362 struct nfsvattr na; 363 364 if (vpislocked == 0) { 365 /* 366 * When vpislocked == 0, the vnode is either exclusively 367 * locked by this thread or not locked by this thread. 368 * As such, shared lock it, if not exclusively locked. 369 */ 370 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 371 lockedit = 1; 372 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 373 } 374 } 375 376 /* 377 * Acquire the Change, Size, TimeAccess, TimeModify and SpaceUsed 378 * attributes, as required. 379 * This needs to be done for regular files if: 380 * - non-NFSv4 RPCs or 381 * - when attrbitp == NULL or 382 * - an NFSv4 RPC with any of the above attributes in attrbitp. 383 * A return of 0 for nfsrv_proxyds() indicates that it has acquired 384 * these attributes. nfsrv_proxyds() will return an error if the 385 * server is not a pNFS one. 386 */ 387 gotattr = 0; 388 if (vp->v_type == VREG && nfsrv_devidcnt > 0 && (attrbitp == NULL || 389 (nd->nd_flag & ND_NFSV4) == 0 || 390 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_CHANGE) || 391 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) || 392 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESS) || 393 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFY) || 394 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEUSED))) { 395 error = nfsrv_proxyds(vp, 0, 0, nd->nd_cred, p, 396 NFSPROC_GETATTR, NULL, NULL, NULL, &na, NULL, NULL, 0, 397 NULL); 398 if (error == 0) 399 gotattr = 1; 400 } 401 402 error = VOP_GETATTR(vp, &nvap->na_vattr, nd->nd_cred); 403 if (lockedit != 0) 404 NFSVOPUNLOCK(vp); 405 406 /* 407 * If we got the Change, Size and Modify Time from the DS, 408 * replace them. 409 */ 410 if (gotattr != 0) { 411 nvap->na_atime = na.na_atime; 412 nvap->na_mtime = na.na_mtime; 413 nvap->na_filerev = na.na_filerev; 414 nvap->na_size = na.na_size; 415 nvap->na_bytes = na.na_bytes; 416 } 417 NFSD_DEBUG(4, "nfsvno_getattr: gotattr=%d err=%d chg=%ju\n", gotattr, 418 error, (uintmax_t)na.na_filerev); 419 420 NFSEXITCODE(error); 421 return (error); 422 } 423 424 /* 425 * Get a file handle for a vnode. 426 */ 427 int 428 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 429 { 430 int error; 431 432 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 433 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 434 error = VOP_VPTOFH(vp, &fhp->fh_fid); 435 436 NFSEXITCODE(error); 437 return (error); 438 } 439 440 /* 441 * Perform access checking for vnodes obtained from file handles that would 442 * refer to files already opened by a Unix client. You cannot just use 443 * vn_writechk() and VOP_ACCESSX() for two reasons. 444 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 445 * case. 446 * 2 - The owner is to be given access irrespective of mode bits for some 447 * operations, so that processes that chmod after opening a file don't 448 * break. 449 */ 450 int 451 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 452 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 453 u_int32_t *supportedtypep) 454 { 455 struct vattr vattr; 456 int error = 0, getret = 0; 457 458 if (vpislocked == 0) { 459 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 460 error = EPERM; 461 goto out; 462 } 463 } 464 if (accmode & VWRITE) { 465 /* Just vn_writechk() changed to check rdonly */ 466 /* 467 * Disallow write attempts on read-only file systems; 468 * unless the file is a socket or a block or character 469 * device resident on the file system. 470 */ 471 if (NFSVNO_EXRDONLY(exp) || 472 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 473 switch (vp->v_type) { 474 case VREG: 475 case VDIR: 476 case VLNK: 477 error = EROFS; 478 default: 479 break; 480 } 481 } 482 /* 483 * If there's shared text associated with 484 * the inode, try to free it up once. If 485 * we fail, we can't allow writing. 486 */ 487 if (VOP_IS_TEXT(vp) && error == 0) 488 error = ETXTBSY; 489 } 490 if (error != 0) { 491 if (vpislocked == 0) 492 NFSVOPUNLOCK(vp); 493 goto out; 494 } 495 496 /* 497 * Should the override still be applied when ACLs are enabled? 498 */ 499 error = VOP_ACCESSX(vp, accmode, cred, p); 500 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 501 /* 502 * Try again with VEXPLICIT_DENY, to see if the test for 503 * deletion is supported. 504 */ 505 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 506 if (error == 0) { 507 if (vp->v_type == VDIR) { 508 accmode &= ~(VDELETE | VDELETE_CHILD); 509 accmode |= VWRITE; 510 error = VOP_ACCESSX(vp, accmode, cred, p); 511 } else if (supportedtypep != NULL) { 512 *supportedtypep &= ~NFSACCESS_DELETE; 513 } 514 } 515 } 516 517 /* 518 * Allow certain operations for the owner (reads and writes 519 * on files that are already open). 520 */ 521 if (override != NFSACCCHK_NOOVERRIDE && 522 (error == EPERM || error == EACCES)) { 523 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 524 error = 0; 525 else if (override & NFSACCCHK_ALLOWOWNER) { 526 getret = VOP_GETATTR(vp, &vattr, cred); 527 if (getret == 0 && cred->cr_uid == vattr.va_uid) 528 error = 0; 529 } 530 } 531 if (vpislocked == 0) 532 NFSVOPUNLOCK(vp); 533 534 out: 535 NFSEXITCODE(error); 536 return (error); 537 } 538 539 /* 540 * Set attribute(s) vnop. 541 */ 542 int 543 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 544 struct thread *p, struct nfsexstuff *exp) 545 { 546 u_quad_t savsize = 0; 547 int error, savedit; 548 time_t savbtime; 549 550 /* 551 * If this is an exported file system and a pNFS service is running, 552 * don't VOP_SETATTR() of size for the MDS file system. 553 */ 554 savedit = 0; 555 error = 0; 556 if (vp->v_type == VREG && (vp->v_mount->mnt_flag & MNT_EXPORTED) != 0 && 557 nfsrv_devidcnt != 0 && nvap->na_vattr.va_size != VNOVAL && 558 nvap->na_vattr.va_size > 0) { 559 savsize = nvap->na_vattr.va_size; 560 nvap->na_vattr.va_size = VNOVAL; 561 if (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 562 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 563 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 564 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 565 nvap->na_vattr.va_mtime.tv_sec != VNOVAL) 566 savedit = 1; 567 else 568 savedit = 2; 569 } 570 if (savedit != 2) 571 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 572 if (savedit != 0) 573 nvap->na_vattr.va_size = savsize; 574 if (error == 0 && (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 575 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 576 nvap->na_vattr.va_size != VNOVAL || 577 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 578 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 579 nvap->na_vattr.va_mtime.tv_sec != VNOVAL)) { 580 /* Never modify birthtime on a DS file. */ 581 savbtime = nvap->na_vattr.va_birthtime.tv_sec; 582 nvap->na_vattr.va_birthtime.tv_sec = VNOVAL; 583 /* For a pNFS server, set the attributes on the DS file. */ 584 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETATTR, 585 NULL, NULL, NULL, nvap, NULL, NULL, 0, NULL); 586 nvap->na_vattr.va_birthtime.tv_sec = savbtime; 587 if (error == ENOENT) 588 error = 0; 589 } 590 NFSEXITCODE(error); 591 return (error); 592 } 593 594 /* 595 * Set up nameidata for a lookup() call and do it. 596 */ 597 int 598 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 599 struct vnode *dp, int islocked, struct nfsexstuff *exp, 600 struct vnode **retdirp) 601 { 602 struct componentname *cnp = &ndp->ni_cnd; 603 int i; 604 struct iovec aiov; 605 struct uio auio; 606 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 607 int error = 0; 608 char *cp; 609 610 *retdirp = NULL; 611 cnp->cn_nameptr = cnp->cn_pnbuf; 612 ndp->ni_lcf = 0; 613 /* 614 * Extract and set starting directory. 615 */ 616 if (dp->v_type != VDIR) { 617 if (islocked) 618 vput(dp); 619 else 620 vrele(dp); 621 nfsvno_relpathbuf(ndp); 622 error = ENOTDIR; 623 goto out1; 624 } 625 if (islocked) 626 NFSVOPUNLOCK(dp); 627 VREF(dp); 628 *retdirp = dp; 629 if (NFSVNO_EXRDONLY(exp)) 630 cnp->cn_flags |= RDONLY; 631 ndp->ni_segflg = UIO_SYSSPACE; 632 633 if (nd->nd_flag & ND_PUBLOOKUP) { 634 ndp->ni_loopcnt = 0; 635 if (cnp->cn_pnbuf[0] == '/') { 636 vrele(dp); 637 /* 638 * Check for degenerate pathnames here, since lookup() 639 * panics on them. 640 */ 641 for (i = 1; i < ndp->ni_pathlen; i++) 642 if (cnp->cn_pnbuf[i] != '/') 643 break; 644 if (i == ndp->ni_pathlen) { 645 error = NFSERR_ACCES; 646 goto out; 647 } 648 dp = rootvnode; 649 VREF(dp); 650 } 651 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 652 (nd->nd_flag & ND_NFSV4) == 0) { 653 /* 654 * Only cross mount points for NFSv4 when doing a 655 * mount while traversing the file system above 656 * the mount point, unless nfsrv_enable_crossmntpt is set. 657 */ 658 cnp->cn_flags |= NOCROSSMOUNT; 659 } 660 661 /* 662 * Initialize for scan, set ni_startdir and bump ref on dp again 663 * because lookup() will dereference ni_startdir. 664 */ 665 666 ndp->ni_startdir = dp; 667 ndp->ni_rootdir = rootvnode; 668 ndp->ni_topdir = NULL; 669 670 if (!lockleaf) 671 cnp->cn_flags |= LOCKLEAF; 672 for (;;) { 673 cnp->cn_nameptr = cnp->cn_pnbuf; 674 /* 675 * Call lookup() to do the real work. If an error occurs, 676 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 677 * we do not have to dereference anything before returning. 678 * In either case ni_startdir will be dereferenced and NULLed 679 * out. 680 */ 681 error = vfs_lookup(ndp); 682 if (error) 683 break; 684 685 /* 686 * Check for encountering a symbolic link. Trivial 687 * termination occurs if no symlink encountered. 688 */ 689 if ((cnp->cn_flags & ISSYMLINK) == 0) { 690 if (ndp->ni_vp && !lockleaf) 691 NFSVOPUNLOCK(ndp->ni_vp); 692 break; 693 } 694 695 /* 696 * Validate symlink 697 */ 698 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 699 NFSVOPUNLOCK(ndp->ni_dvp); 700 if (!(nd->nd_flag & ND_PUBLOOKUP)) { 701 error = EINVAL; 702 goto badlink2; 703 } 704 705 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 706 error = ELOOP; 707 goto badlink2; 708 } 709 if (ndp->ni_pathlen > 1) 710 cp = uma_zalloc(namei_zone, M_WAITOK); 711 else 712 cp = cnp->cn_pnbuf; 713 aiov.iov_base = cp; 714 aiov.iov_len = MAXPATHLEN; 715 auio.uio_iov = &aiov; 716 auio.uio_iovcnt = 1; 717 auio.uio_offset = 0; 718 auio.uio_rw = UIO_READ; 719 auio.uio_segflg = UIO_SYSSPACE; 720 auio.uio_td = NULL; 721 auio.uio_resid = MAXPATHLEN; 722 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 723 if (error) { 724 badlink1: 725 if (ndp->ni_pathlen > 1) 726 uma_zfree(namei_zone, cp); 727 badlink2: 728 vrele(ndp->ni_dvp); 729 vput(ndp->ni_vp); 730 break; 731 } 732 linklen = MAXPATHLEN - auio.uio_resid; 733 if (linklen == 0) { 734 error = ENOENT; 735 goto badlink1; 736 } 737 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 738 error = ENAMETOOLONG; 739 goto badlink1; 740 } 741 742 /* 743 * Adjust or replace path 744 */ 745 if (ndp->ni_pathlen > 1) { 746 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 747 uma_zfree(namei_zone, cnp->cn_pnbuf); 748 cnp->cn_pnbuf = cp; 749 } else 750 cnp->cn_pnbuf[linklen] = '\0'; 751 ndp->ni_pathlen += linklen; 752 753 /* 754 * Cleanup refs for next loop and check if root directory 755 * should replace current directory. Normally ni_dvp 756 * becomes the new base directory and is cleaned up when 757 * we loop. Explicitly null pointers after invalidation 758 * to clarify operation. 759 */ 760 vput(ndp->ni_vp); 761 ndp->ni_vp = NULL; 762 763 if (cnp->cn_pnbuf[0] == '/') { 764 vrele(ndp->ni_dvp); 765 ndp->ni_dvp = ndp->ni_rootdir; 766 VREF(ndp->ni_dvp); 767 } 768 ndp->ni_startdir = ndp->ni_dvp; 769 ndp->ni_dvp = NULL; 770 } 771 if (!lockleaf) 772 cnp->cn_flags &= ~LOCKLEAF; 773 774 out: 775 if (error) { 776 nfsvno_relpathbuf(ndp); 777 ndp->ni_vp = NULL; 778 ndp->ni_dvp = NULL; 779 ndp->ni_startdir = NULL; 780 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 781 ndp->ni_dvp = NULL; 782 } 783 784 out1: 785 NFSEXITCODE2(error, nd); 786 return (error); 787 } 788 789 /* 790 * Set up a pathname buffer and return a pointer to it and, optionally 791 * set a hash pointer. 792 */ 793 void 794 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp) 795 { 796 struct componentname *cnp = &ndp->ni_cnd; 797 798 cnp->cn_flags |= (NOMACCHECK); 799 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK); 800 if (hashpp != NULL) 801 *hashpp = NULL; 802 *bufpp = cnp->cn_pnbuf; 803 } 804 805 /* 806 * Release the above path buffer, if not released by nfsvno_namei(). 807 */ 808 void 809 nfsvno_relpathbuf(struct nameidata *ndp) 810 { 811 812 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 813 ndp->ni_cnd.cn_pnbuf = NULL; 814 } 815 816 /* 817 * Readlink vnode op into an mbuf list. 818 */ 819 int 820 nfsvno_readlink(struct vnode *vp, struct ucred *cred, int maxextsiz, 821 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 822 { 823 struct iovec *iv; 824 struct uio io, *uiop = &io; 825 struct mbuf *mp, *mp3; 826 int len, tlen, error = 0; 827 828 len = NFS_MAXPATHLEN; 829 if (maxextsiz > 0) 830 uiop->uio_iovcnt = nfsrv_createiovec_extpgs(len, maxextsiz, 831 &mp3, &mp, &iv); 832 else 833 uiop->uio_iovcnt = nfsrv_createiovec(len, &mp3, &mp, &iv); 834 uiop->uio_iov = iv; 835 uiop->uio_offset = 0; 836 uiop->uio_resid = len; 837 uiop->uio_rw = UIO_READ; 838 uiop->uio_segflg = UIO_SYSSPACE; 839 uiop->uio_td = NULL; 840 error = VOP_READLINK(vp, uiop, cred); 841 free(iv, M_TEMP); 842 if (error) { 843 m_freem(mp3); 844 *lenp = 0; 845 goto out; 846 } 847 if (uiop->uio_resid > 0) { 848 len -= uiop->uio_resid; 849 tlen = NFSM_RNDUP(len); 850 if (tlen == 0) { 851 m_freem(mp3); 852 mp3 = mp = NULL; 853 } else if (tlen != NFS_MAXPATHLEN || tlen != len) 854 mp = nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, 855 tlen - len); 856 } 857 *lenp = len; 858 *mpp = mp3; 859 *mpendp = mp; 860 861 out: 862 NFSEXITCODE(error); 863 return (error); 864 } 865 866 /* 867 * Create an mbuf chain and an associated iovec that can be used to Read 868 * or Getextattr of data. 869 * Upon success, return pointers to the first and last mbufs in the chain 870 * plus the malloc'd iovec and its iovlen. 871 */ 872 static int 873 nfsrv_createiovec(int len, struct mbuf **mpp, struct mbuf **mpendp, 874 struct iovec **ivp) 875 { 876 struct mbuf *m, *m2 = NULL, *m3; 877 struct iovec *iv; 878 int i, left, siz; 879 880 left = len; 881 m3 = NULL; 882 /* 883 * Generate the mbuf list with the uio_iov ref. to it. 884 */ 885 i = 0; 886 while (left > 0) { 887 NFSMGET(m); 888 MCLGET(m, M_WAITOK); 889 m->m_len = 0; 890 siz = min(M_TRAILINGSPACE(m), left); 891 left -= siz; 892 i++; 893 if (m3) 894 m2->m_next = m; 895 else 896 m3 = m; 897 m2 = m; 898 } 899 *ivp = iv = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 900 m = m3; 901 left = len; 902 i = 0; 903 while (left > 0) { 904 if (m == NULL) 905 panic("nfsrv_createiovec iov"); 906 siz = min(M_TRAILINGSPACE(m), left); 907 if (siz > 0) { 908 iv->iov_base = mtod(m, caddr_t) + m->m_len; 909 iv->iov_len = siz; 910 m->m_len += siz; 911 left -= siz; 912 iv++; 913 i++; 914 } 915 m = m->m_next; 916 } 917 *mpp = m3; 918 *mpendp = m2; 919 return (i); 920 } 921 922 /* 923 * Create an mbuf chain and an associated iovec that can be used to Read 924 * or Getextattr of data. 925 * Upon success, return pointers to the first and last mbufs in the chain 926 * plus the malloc'd iovec and its iovlen. 927 * Same as above, but creates ext_pgs mbuf(s). 928 */ 929 static int 930 nfsrv_createiovec_extpgs(int len, int maxextsiz, struct mbuf **mpp, 931 struct mbuf **mpendp, struct iovec **ivp) 932 { 933 struct mbuf *m, *m2 = NULL, *m3; 934 struct iovec *iv; 935 int i, left, pgno, siz; 936 937 left = len; 938 m3 = NULL; 939 /* 940 * Generate the mbuf list with the uio_iov ref. to it. 941 */ 942 i = 0; 943 while (left > 0) { 944 siz = min(left, maxextsiz); 945 m = mb_alloc_ext_plus_pages(siz, M_WAITOK); 946 left -= siz; 947 i += m->m_epg_npgs; 948 if (m3 != NULL) 949 m2->m_next = m; 950 else 951 m3 = m; 952 m2 = m; 953 } 954 *ivp = iv = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 955 m = m3; 956 left = len; 957 i = 0; 958 pgno = 0; 959 while (left > 0) { 960 if (m == NULL) 961 panic("nfsvno_createiovec_extpgs iov"); 962 siz = min(PAGE_SIZE, left); 963 if (siz > 0) { 964 iv->iov_base = (void *)PHYS_TO_DMAP(m->m_epg_pa[pgno]); 965 iv->iov_len = siz; 966 m->m_len += siz; 967 if (pgno == m->m_epg_npgs - 1) 968 m->m_epg_last_len = siz; 969 left -= siz; 970 iv++; 971 i++; 972 pgno++; 973 } 974 if (pgno == m->m_epg_npgs && left > 0) { 975 m = m->m_next; 976 if (m == NULL) 977 panic("nfsvno_createiovec_extpgs iov"); 978 pgno = 0; 979 } 980 } 981 *mpp = m3; 982 *mpendp = m2; 983 return (i); 984 } 985 986 /* 987 * Read vnode op call into mbuf list. 988 */ 989 int 990 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 991 int maxextsiz, struct thread *p, struct mbuf **mpp, 992 struct mbuf **mpendp) 993 { 994 struct mbuf *m; 995 struct iovec *iv; 996 int error = 0, len, tlen, ioflag = 0; 997 struct mbuf *m3; 998 struct uio io, *uiop = &io; 999 struct nfsheur *nh; 1000 1001 /* 1002 * Attempt to read from a DS file. A return of ENOENT implies 1003 * there is no DS file to read. 1004 */ 1005 error = nfsrv_proxyds(vp, off, cnt, cred, p, NFSPROC_READDS, mpp, 1006 NULL, mpendp, NULL, NULL, NULL, 0, NULL); 1007 if (error != ENOENT) 1008 return (error); 1009 1010 len = NFSM_RNDUP(cnt); 1011 if (maxextsiz > 0) 1012 uiop->uio_iovcnt = nfsrv_createiovec_extpgs(len, maxextsiz, 1013 &m3, &m, &iv); 1014 else 1015 uiop->uio_iovcnt = nfsrv_createiovec(len, &m3, &m, &iv); 1016 uiop->uio_iov = iv; 1017 uiop->uio_offset = off; 1018 uiop->uio_resid = len; 1019 uiop->uio_rw = UIO_READ; 1020 uiop->uio_segflg = UIO_SYSSPACE; 1021 uiop->uio_td = NULL; 1022 nh = nfsrv_sequential_heuristic(uiop, vp); 1023 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 1024 /* XXX KDM make this more systematic? */ 1025 nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid; 1026 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 1027 free(iv, M_TEMP); 1028 if (error) { 1029 m_freem(m3); 1030 *mpp = NULL; 1031 goto out; 1032 } 1033 nh->nh_nextoff = uiop->uio_offset; 1034 tlen = len - uiop->uio_resid; 1035 cnt = cnt < tlen ? cnt : tlen; 1036 tlen = NFSM_RNDUP(cnt); 1037 if (tlen == 0) { 1038 m_freem(m3); 1039 m3 = m = NULL; 1040 } else if (len != tlen || tlen != cnt) 1041 m = nfsrv_adj(m3, len - tlen, tlen - cnt); 1042 *mpp = m3; 1043 *mpendp = m; 1044 1045 out: 1046 NFSEXITCODE(error); 1047 return (error); 1048 } 1049 1050 /* 1051 * Create the iovec for the mbuf chain passed in as an argument. 1052 * The "cp" argument is where the data starts within the first mbuf in 1053 * the chain. It returns the iovec and the iovcnt. 1054 */ 1055 static int 1056 nfsrv_createiovecw(int retlen, struct mbuf *m, char *cp, struct iovec **ivpp, 1057 int *iovcntp) 1058 { 1059 struct mbuf *mp; 1060 struct iovec *ivp; 1061 int cnt, i, len; 1062 1063 /* 1064 * Loop through the mbuf chain, counting how many mbufs are a 1065 * part of this write operation, so the iovec size is known. 1066 */ 1067 cnt = 0; 1068 len = retlen; 1069 mp = m; 1070 i = mtod(mp, caddr_t) + mp->m_len - cp; 1071 while (len > 0) { 1072 if (i > 0) { 1073 len -= i; 1074 cnt++; 1075 } 1076 mp = mp->m_next; 1077 if (!mp) { 1078 if (len > 0) 1079 return (EBADRPC); 1080 } else 1081 i = mp->m_len; 1082 } 1083 1084 /* Now, create the iovec. */ 1085 mp = m; 1086 *ivpp = ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, 1087 M_WAITOK); 1088 *iovcntp = cnt; 1089 i = mtod(mp, caddr_t) + mp->m_len - cp; 1090 len = retlen; 1091 while (len > 0) { 1092 if (mp == NULL) 1093 panic("nfsrv_createiovecw"); 1094 if (i > 0) { 1095 i = min(i, len); 1096 ivp->iov_base = cp; 1097 ivp->iov_len = i; 1098 ivp++; 1099 len -= i; 1100 } 1101 mp = mp->m_next; 1102 if (mp) { 1103 i = mp->m_len; 1104 cp = mtod(mp, caddr_t); 1105 } 1106 } 1107 return (0); 1108 } 1109 1110 /* 1111 * Write vnode op from an mbuf list. 1112 */ 1113 int 1114 nfsvno_write(struct vnode *vp, off_t off, int retlen, int *stable, 1115 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 1116 { 1117 struct iovec *iv; 1118 int cnt, ioflags, error; 1119 struct uio io, *uiop = &io; 1120 struct nfsheur *nh; 1121 1122 /* 1123 * Attempt to write to a DS file. A return of ENOENT implies 1124 * there is no DS file to write. 1125 */ 1126 error = nfsrv_proxyds(vp, off, retlen, cred, p, NFSPROC_WRITEDS, 1127 &mp, cp, NULL, NULL, NULL, NULL, 0, NULL); 1128 if (error != ENOENT) { 1129 *stable = NFSWRITE_FILESYNC; 1130 return (error); 1131 } 1132 1133 if (*stable == NFSWRITE_UNSTABLE) 1134 ioflags = IO_NODELOCKED; 1135 else 1136 ioflags = (IO_SYNC | IO_NODELOCKED); 1137 error = nfsrv_createiovecw(retlen, mp, cp, &iv, &cnt); 1138 if (error != 0) 1139 return (error); 1140 uiop->uio_iov = iv; 1141 uiop->uio_iovcnt = cnt; 1142 uiop->uio_resid = retlen; 1143 uiop->uio_rw = UIO_WRITE; 1144 uiop->uio_segflg = UIO_SYSSPACE; 1145 NFSUIOPROC(uiop, p); 1146 uiop->uio_offset = off; 1147 nh = nfsrv_sequential_heuristic(uiop, vp); 1148 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 1149 /* XXX KDM make this more systematic? */ 1150 nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid; 1151 error = VOP_WRITE(vp, uiop, ioflags, cred); 1152 if (error == 0) 1153 nh->nh_nextoff = uiop->uio_offset; 1154 free(iv, M_TEMP); 1155 1156 NFSEXITCODE(error); 1157 return (error); 1158 } 1159 1160 /* 1161 * Common code for creating a regular file (plus special files for V2). 1162 */ 1163 int 1164 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 1165 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 1166 int32_t *cverf, NFSDEV_T rdev, struct nfsexstuff *exp) 1167 { 1168 u_quad_t tempsize; 1169 int error; 1170 struct thread *p = curthread; 1171 1172 error = nd->nd_repstat; 1173 if (!error && ndp->ni_vp == NULL) { 1174 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 1175 error = VOP_CREATE(ndp->ni_dvp, 1176 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1177 /* For a pNFS server, create the data file on a DS. */ 1178 if (error == 0 && nvap->na_type == VREG) { 1179 /* 1180 * Create a data file on a DS for a pNFS server. 1181 * This function just returns if not 1182 * running a pNFS DS or the creation fails. 1183 */ 1184 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1185 nd->nd_cred, p); 1186 } 1187 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : 1188 NULL, false); 1189 nfsvno_relpathbuf(ndp); 1190 if (!error) { 1191 if (*exclusive_flagp) { 1192 *exclusive_flagp = 0; 1193 NFSVNO_ATTRINIT(nvap); 1194 nvap->na_atime.tv_sec = cverf[0]; 1195 nvap->na_atime.tv_nsec = cverf[1]; 1196 error = VOP_SETATTR(ndp->ni_vp, 1197 &nvap->na_vattr, nd->nd_cred); 1198 if (error != 0) { 1199 vput(ndp->ni_vp); 1200 ndp->ni_vp = NULL; 1201 error = NFSERR_NOTSUPP; 1202 } 1203 } 1204 } 1205 /* 1206 * NFS V2 Only. nfsrvd_mknod() does this for V3. 1207 * (This implies, just get out on an error.) 1208 */ 1209 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 1210 nvap->na_type == VFIFO) { 1211 if (nvap->na_type == VCHR && rdev == 0xffffffff) 1212 nvap->na_type = VFIFO; 1213 if (nvap->na_type != VFIFO && 1214 (error = priv_check_cred(nd->nd_cred, PRIV_VFS_MKNOD_DEV))) { 1215 nfsvno_relpathbuf(ndp); 1216 vput(ndp->ni_dvp); 1217 goto out; 1218 } 1219 nvap->na_rdev = rdev; 1220 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1221 &ndp->ni_cnd, &nvap->na_vattr); 1222 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : 1223 NULL, false); 1224 nfsvno_relpathbuf(ndp); 1225 if (error) 1226 goto out; 1227 } else { 1228 nfsvno_relpathbuf(ndp); 1229 vput(ndp->ni_dvp); 1230 error = ENXIO; 1231 goto out; 1232 } 1233 *vpp = ndp->ni_vp; 1234 } else { 1235 /* 1236 * Handle cases where error is already set and/or 1237 * the file exists. 1238 * 1 - clean up the lookup 1239 * 2 - iff !error and na_size set, truncate it 1240 */ 1241 nfsvno_relpathbuf(ndp); 1242 *vpp = ndp->ni_vp; 1243 if (ndp->ni_dvp == *vpp) 1244 vrele(ndp->ni_dvp); 1245 else 1246 vput(ndp->ni_dvp); 1247 if (!error && nvap->na_size != VNOVAL) { 1248 error = nfsvno_accchk(*vpp, VWRITE, 1249 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1250 NFSACCCHK_VPISLOCKED, NULL); 1251 if (!error) { 1252 tempsize = nvap->na_size; 1253 NFSVNO_ATTRINIT(nvap); 1254 nvap->na_size = tempsize; 1255 error = nfsvno_setattr(*vpp, nvap, 1256 nd->nd_cred, p, exp); 1257 } 1258 } 1259 if (error) 1260 vput(*vpp); 1261 } 1262 1263 out: 1264 NFSEXITCODE(error); 1265 return (error); 1266 } 1267 1268 /* 1269 * Do a mknod vnode op. 1270 */ 1271 int 1272 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 1273 struct thread *p) 1274 { 1275 int error = 0; 1276 enum vtype vtyp; 1277 1278 vtyp = nvap->na_type; 1279 /* 1280 * Iff doesn't exist, create it. 1281 */ 1282 if (ndp->ni_vp) { 1283 nfsvno_relpathbuf(ndp); 1284 vput(ndp->ni_dvp); 1285 vrele(ndp->ni_vp); 1286 error = EEXIST; 1287 goto out; 1288 } 1289 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1290 nfsvno_relpathbuf(ndp); 1291 vput(ndp->ni_dvp); 1292 error = NFSERR_BADTYPE; 1293 goto out; 1294 } 1295 if (vtyp == VSOCK) { 1296 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 1297 &ndp->ni_cnd, &nvap->na_vattr); 1298 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : NULL, 1299 false); 1300 nfsvno_relpathbuf(ndp); 1301 } else { 1302 if (nvap->na_type != VFIFO && 1303 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV))) { 1304 nfsvno_relpathbuf(ndp); 1305 vput(ndp->ni_dvp); 1306 goto out; 1307 } 1308 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1309 &ndp->ni_cnd, &nvap->na_vattr); 1310 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : NULL, 1311 false); 1312 nfsvno_relpathbuf(ndp); 1313 /* 1314 * Since VOP_MKNOD returns the ni_vp, I can't 1315 * see any reason to do the lookup. 1316 */ 1317 } 1318 1319 out: 1320 NFSEXITCODE(error); 1321 return (error); 1322 } 1323 1324 /* 1325 * Mkdir vnode op. 1326 */ 1327 int 1328 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 1329 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 1330 { 1331 int error = 0; 1332 1333 if (ndp->ni_vp != NULL) { 1334 if (ndp->ni_dvp == ndp->ni_vp) 1335 vrele(ndp->ni_dvp); 1336 else 1337 vput(ndp->ni_dvp); 1338 vrele(ndp->ni_vp); 1339 nfsvno_relpathbuf(ndp); 1340 error = EEXIST; 1341 goto out; 1342 } 1343 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1344 &nvap->na_vattr); 1345 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : NULL, false); 1346 nfsvno_relpathbuf(ndp); 1347 1348 out: 1349 NFSEXITCODE(error); 1350 return (error); 1351 } 1352 1353 /* 1354 * symlink vnode op. 1355 */ 1356 int 1357 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 1358 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 1359 struct nfsexstuff *exp) 1360 { 1361 int error = 0; 1362 1363 if (ndp->ni_vp) { 1364 nfsvno_relpathbuf(ndp); 1365 if (ndp->ni_dvp == ndp->ni_vp) 1366 vrele(ndp->ni_dvp); 1367 else 1368 vput(ndp->ni_dvp); 1369 vrele(ndp->ni_vp); 1370 error = EEXIST; 1371 goto out; 1372 } 1373 1374 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1375 &nvap->na_vattr, pathcp); 1376 /* 1377 * Although FreeBSD still had the lookup code in 1378 * it for 7/current, there doesn't seem to be any 1379 * point, since VOP_SYMLINK() returns the ni_vp. 1380 * Just vput it for v2. 1381 */ 1382 VOP_VPUT_PAIR(ndp->ni_dvp, &ndp->ni_vp, !not_v2 && error == 0); 1383 nfsvno_relpathbuf(ndp); 1384 1385 out: 1386 NFSEXITCODE(error); 1387 return (error); 1388 } 1389 1390 /* 1391 * Parse symbolic link arguments. 1392 * This function has an ugly side effect. It will malloc() an area for 1393 * the symlink and set iov_base to point to it, only if it succeeds. 1394 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1395 * be FREE'd later. 1396 */ 1397 int 1398 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1399 struct thread *p, char **pathcpp, int *lenp) 1400 { 1401 u_int32_t *tl; 1402 char *pathcp = NULL; 1403 int error = 0, len; 1404 struct nfsv2_sattr *sp; 1405 1406 *pathcpp = NULL; 1407 *lenp = 0; 1408 if ((nd->nd_flag & ND_NFSV3) && 1409 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1410 goto nfsmout; 1411 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1412 len = fxdr_unsigned(int, *tl); 1413 if (len > NFS_MAXPATHLEN || len <= 0) { 1414 error = EBADRPC; 1415 goto nfsmout; 1416 } 1417 pathcp = malloc(len + 1, M_TEMP, M_WAITOK); 1418 error = nfsrv_mtostr(nd, pathcp, len); 1419 if (error) 1420 goto nfsmout; 1421 if (nd->nd_flag & ND_NFSV2) { 1422 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1423 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1424 } 1425 *pathcpp = pathcp; 1426 *lenp = len; 1427 NFSEXITCODE2(0, nd); 1428 return (0); 1429 nfsmout: 1430 if (pathcp) 1431 free(pathcp, M_TEMP); 1432 NFSEXITCODE2(error, nd); 1433 return (error); 1434 } 1435 1436 /* 1437 * Remove a non-directory object. 1438 */ 1439 int 1440 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1441 struct thread *p, struct nfsexstuff *exp) 1442 { 1443 struct vnode *vp, *dsdvp[NFSDEV_MAXMIRRORS]; 1444 int error = 0, mirrorcnt; 1445 char fname[PNFS_FILENAME_LEN + 1]; 1446 fhandle_t fh; 1447 1448 vp = ndp->ni_vp; 1449 dsdvp[0] = NULL; 1450 if (vp->v_type == VDIR) 1451 error = NFSERR_ISDIR; 1452 else if (is_v4) 1453 error = nfsrv_checkremove(vp, 1, NULL, (nfsquad_t)((u_quad_t)0), 1454 p); 1455 if (error == 0) 1456 nfsrv_pnfsremovesetup(vp, p, dsdvp, &mirrorcnt, fname, &fh); 1457 if (!error) 1458 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1459 if (error == 0 && dsdvp[0] != NULL) 1460 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1461 if (ndp->ni_dvp == vp) 1462 vrele(ndp->ni_dvp); 1463 else 1464 vput(ndp->ni_dvp); 1465 vput(vp); 1466 nfsvno_relpathbuf(ndp); 1467 NFSEXITCODE(error); 1468 return (error); 1469 } 1470 1471 /* 1472 * Remove a directory. 1473 */ 1474 int 1475 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1476 struct thread *p, struct nfsexstuff *exp) 1477 { 1478 struct vnode *vp; 1479 int error = 0; 1480 1481 vp = ndp->ni_vp; 1482 if (vp->v_type != VDIR) { 1483 error = ENOTDIR; 1484 goto out; 1485 } 1486 /* 1487 * No rmdir "." please. 1488 */ 1489 if (ndp->ni_dvp == vp) { 1490 error = EINVAL; 1491 goto out; 1492 } 1493 /* 1494 * The root of a mounted filesystem cannot be deleted. 1495 */ 1496 if (vp->v_vflag & VV_ROOT) 1497 error = EBUSY; 1498 out: 1499 if (!error) 1500 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1501 if (ndp->ni_dvp == vp) 1502 vrele(ndp->ni_dvp); 1503 else 1504 vput(ndp->ni_dvp); 1505 vput(vp); 1506 nfsvno_relpathbuf(ndp); 1507 NFSEXITCODE(error); 1508 return (error); 1509 } 1510 1511 /* 1512 * Rename vnode op. 1513 */ 1514 int 1515 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1516 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1517 { 1518 struct vnode *fvp, *tvp, *tdvp, *dsdvp[NFSDEV_MAXMIRRORS]; 1519 int error = 0, mirrorcnt; 1520 char fname[PNFS_FILENAME_LEN + 1]; 1521 fhandle_t fh; 1522 1523 dsdvp[0] = NULL; 1524 fvp = fromndp->ni_vp; 1525 if (ndstat) { 1526 vrele(fromndp->ni_dvp); 1527 vrele(fvp); 1528 error = ndstat; 1529 goto out1; 1530 } 1531 tdvp = tondp->ni_dvp; 1532 tvp = tondp->ni_vp; 1533 if (tvp != NULL) { 1534 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1535 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1536 goto out; 1537 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1538 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1539 goto out; 1540 } 1541 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1542 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1543 goto out; 1544 } 1545 1546 /* 1547 * A rename to '.' or '..' results in a prematurely 1548 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1549 * here. 1550 */ 1551 if ((tondp->ni_cnd.cn_namelen == 1 && 1552 tondp->ni_cnd.cn_nameptr[0] == '.') || 1553 (tondp->ni_cnd.cn_namelen == 2 && 1554 tondp->ni_cnd.cn_nameptr[0] == '.' && 1555 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1556 error = EINVAL; 1557 goto out; 1558 } 1559 } 1560 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1561 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1562 goto out; 1563 } 1564 if (fvp->v_mount != tdvp->v_mount) { 1565 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1566 goto out; 1567 } 1568 if (fvp == tdvp) { 1569 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1570 goto out; 1571 } 1572 if (fvp == tvp) { 1573 /* 1574 * If source and destination are the same, there is nothing to 1575 * do. Set error to -1 to indicate this. 1576 */ 1577 error = -1; 1578 goto out; 1579 } 1580 if (ndflag & ND_NFSV4) { 1581 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1582 error = nfsrv_checkremove(fvp, 0, NULL, 1583 (nfsquad_t)((u_quad_t)0), p); 1584 NFSVOPUNLOCK(fvp); 1585 } else 1586 error = EPERM; 1587 if (tvp && !error) 1588 error = nfsrv_checkremove(tvp, 1, NULL, 1589 (nfsquad_t)((u_quad_t)0), p); 1590 } else { 1591 /* 1592 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1593 * that the NFSv4 client won't be confused by the rename. 1594 * Since nfsd_recalldelegation() can only be called on an 1595 * unlocked vnode at this point and fvp is the file that will 1596 * still exist after the rename, just do fvp. 1597 */ 1598 nfsd_recalldelegation(fvp, p); 1599 } 1600 if (error == 0 && tvp != NULL) { 1601 nfsrv_pnfsremovesetup(tvp, p, dsdvp, &mirrorcnt, fname, &fh); 1602 NFSD_DEBUG(4, "nfsvno_rename: pnfsremovesetup" 1603 " dsdvp=%p\n", dsdvp[0]); 1604 } 1605 out: 1606 if (!error) { 1607 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1608 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1609 &tondp->ni_cnd); 1610 } else { 1611 if (tdvp == tvp) 1612 vrele(tdvp); 1613 else 1614 vput(tdvp); 1615 if (tvp) 1616 vput(tvp); 1617 vrele(fromndp->ni_dvp); 1618 vrele(fvp); 1619 if (error == -1) 1620 error = 0; 1621 } 1622 1623 /* 1624 * If dsdvp[0] != NULL, it was set up by nfsrv_pnfsremovesetup() and 1625 * if the rename succeeded, the DS file for the tvp needs to be 1626 * removed. 1627 */ 1628 if (error == 0 && dsdvp[0] != NULL) { 1629 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1630 NFSD_DEBUG(4, "nfsvno_rename: pnfsremove\n"); 1631 } 1632 1633 nfsvno_relpathbuf(tondp); 1634 out1: 1635 nfsvno_relpathbuf(fromndp); 1636 NFSEXITCODE(error); 1637 return (error); 1638 } 1639 1640 /* 1641 * Link vnode op. 1642 */ 1643 int 1644 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1645 struct thread *p, struct nfsexstuff *exp) 1646 { 1647 struct vnode *xp; 1648 int error = 0; 1649 1650 xp = ndp->ni_vp; 1651 if (xp != NULL) { 1652 error = EEXIST; 1653 } else { 1654 xp = ndp->ni_dvp; 1655 if (vp->v_mount != xp->v_mount) 1656 error = EXDEV; 1657 } 1658 if (!error) { 1659 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1660 if (!VN_IS_DOOMED(vp)) 1661 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1662 else 1663 error = EPERM; 1664 if (ndp->ni_dvp == vp) { 1665 vrele(ndp->ni_dvp); 1666 NFSVOPUNLOCK(vp); 1667 } else { 1668 vref(vp); 1669 VOP_VPUT_PAIR(ndp->ni_dvp, &vp, true); 1670 } 1671 } else { 1672 if (ndp->ni_dvp == ndp->ni_vp) 1673 vrele(ndp->ni_dvp); 1674 else 1675 vput(ndp->ni_dvp); 1676 if (ndp->ni_vp) 1677 vrele(ndp->ni_vp); 1678 } 1679 nfsvno_relpathbuf(ndp); 1680 NFSEXITCODE(error); 1681 return (error); 1682 } 1683 1684 /* 1685 * Do the fsync() appropriate for the commit. 1686 */ 1687 int 1688 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1689 struct thread *td) 1690 { 1691 int error = 0; 1692 1693 /* 1694 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1695 * file is done. At this time VOP_FSYNC does not accept offset and 1696 * byte count parameters so call VOP_FSYNC the whole file for now. 1697 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1698 * File systems that do not use the buffer cache (as indicated 1699 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1700 */ 1701 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1702 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1703 /* 1704 * Give up and do the whole thing 1705 */ 1706 if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { 1707 VM_OBJECT_WLOCK(vp->v_object); 1708 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1709 VM_OBJECT_WUNLOCK(vp->v_object); 1710 } 1711 error = VOP_FSYNC(vp, MNT_WAIT, td); 1712 } else { 1713 /* 1714 * Locate and synchronously write any buffers that fall 1715 * into the requested range. Note: we are assuming that 1716 * f_iosize is a power of 2. 1717 */ 1718 int iosize = vp->v_mount->mnt_stat.f_iosize; 1719 int iomask = iosize - 1; 1720 struct bufobj *bo; 1721 daddr_t lblkno; 1722 1723 /* 1724 * Align to iosize boundary, super-align to page boundary. 1725 */ 1726 if (off & iomask) { 1727 cnt += off & iomask; 1728 off &= ~(u_quad_t)iomask; 1729 } 1730 if (off & PAGE_MASK) { 1731 cnt += off & PAGE_MASK; 1732 off &= ~(u_quad_t)PAGE_MASK; 1733 } 1734 lblkno = off / iosize; 1735 1736 if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { 1737 VM_OBJECT_WLOCK(vp->v_object); 1738 vm_object_page_clean(vp->v_object, off, off + cnt, 1739 OBJPC_SYNC); 1740 VM_OBJECT_WUNLOCK(vp->v_object); 1741 } 1742 1743 bo = &vp->v_bufobj; 1744 BO_LOCK(bo); 1745 while (cnt > 0) { 1746 struct buf *bp; 1747 1748 /* 1749 * If we have a buffer and it is marked B_DELWRI we 1750 * have to lock and write it. Otherwise the prior 1751 * write is assumed to have already been committed. 1752 * 1753 * gbincore() can return invalid buffers now so we 1754 * have to check that bit as well (though B_DELWRI 1755 * should not be set if B_INVAL is set there could be 1756 * a race here since we haven't locked the buffer). 1757 */ 1758 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1759 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1760 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1761 BO_LOCK(bo); 1762 continue; /* retry */ 1763 } 1764 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1765 B_DELWRI) { 1766 bremfree(bp); 1767 bp->b_flags &= ~B_ASYNC; 1768 bwrite(bp); 1769 ++nfs_commit_miss; 1770 } else 1771 BUF_UNLOCK(bp); 1772 BO_LOCK(bo); 1773 } 1774 ++nfs_commit_blks; 1775 if (cnt < iosize) 1776 break; 1777 cnt -= iosize; 1778 ++lblkno; 1779 } 1780 BO_UNLOCK(bo); 1781 } 1782 NFSEXITCODE(error); 1783 return (error); 1784 } 1785 1786 /* 1787 * Statfs vnode op. 1788 */ 1789 int 1790 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1791 { 1792 struct statfs *tsf; 1793 int error; 1794 1795 tsf = NULL; 1796 if (nfsrv_devidcnt > 0) { 1797 /* For a pNFS service, get the DS numbers. */ 1798 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK | M_ZERO); 1799 error = nfsrv_pnfsstatfs(tsf, vp->v_mount); 1800 if (error != 0) { 1801 free(tsf, M_TEMP); 1802 tsf = NULL; 1803 } 1804 } 1805 error = VFS_STATFS(vp->v_mount, sf); 1806 if (error == 0) { 1807 if (tsf != NULL) { 1808 sf->f_blocks = tsf->f_blocks; 1809 sf->f_bavail = tsf->f_bavail; 1810 sf->f_bfree = tsf->f_bfree; 1811 sf->f_bsize = tsf->f_bsize; 1812 } 1813 /* 1814 * Since NFS handles these values as unsigned on the 1815 * wire, there is no way to represent negative values, 1816 * so set them to 0. Without this, they will appear 1817 * to be very large positive values for clients like 1818 * Solaris10. 1819 */ 1820 if (sf->f_bavail < 0) 1821 sf->f_bavail = 0; 1822 if (sf->f_ffree < 0) 1823 sf->f_ffree = 0; 1824 } 1825 free(tsf, M_TEMP); 1826 NFSEXITCODE(error); 1827 return (error); 1828 } 1829 1830 /* 1831 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1832 * must handle nfsrv_opencheck() calls after any other access checks. 1833 */ 1834 void 1835 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1836 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1837 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1838 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, bool done_namei, 1839 struct nfsexstuff *exp, struct vnode **vpp) 1840 { 1841 struct vnode *vp = NULL; 1842 u_quad_t tempsize; 1843 struct nfsexstuff nes; 1844 struct thread *p = curthread; 1845 1846 if (ndp->ni_vp == NULL) 1847 nd->nd_repstat = nfsrv_opencheck(clientid, 1848 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1849 if (!nd->nd_repstat) { 1850 if (ndp->ni_vp == NULL) { 1851 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1852 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1853 /* For a pNFS server, create the data file on a DS. */ 1854 if (nd->nd_repstat == 0) { 1855 /* 1856 * Create a data file on a DS for a pNFS server. 1857 * This function just returns if not 1858 * running a pNFS DS or the creation fails. 1859 */ 1860 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1861 cred, p); 1862 } 1863 VOP_VPUT_PAIR(ndp->ni_dvp, nd->nd_repstat == 0 ? 1864 &ndp->ni_vp : NULL, false); 1865 nfsvno_relpathbuf(ndp); 1866 if (!nd->nd_repstat) { 1867 if (*exclusive_flagp) { 1868 *exclusive_flagp = 0; 1869 NFSVNO_ATTRINIT(nvap); 1870 nvap->na_atime.tv_sec = cverf[0]; 1871 nvap->na_atime.tv_nsec = cverf[1]; 1872 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1873 &nvap->na_vattr, cred); 1874 if (nd->nd_repstat != 0) { 1875 vput(ndp->ni_vp); 1876 ndp->ni_vp = NULL; 1877 nd->nd_repstat = NFSERR_NOTSUPP; 1878 } else 1879 NFSSETBIT_ATTRBIT(attrbitp, 1880 NFSATTRBIT_TIMEACCESS); 1881 } else { 1882 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1883 aclp, p, attrbitp, exp); 1884 } 1885 } 1886 vp = ndp->ni_vp; 1887 } else { 1888 nfsvno_relpathbuf(ndp); 1889 vp = ndp->ni_vp; 1890 if (create == NFSV4OPEN_CREATE) { 1891 if (ndp->ni_dvp == vp) 1892 vrele(ndp->ni_dvp); 1893 else 1894 vput(ndp->ni_dvp); 1895 } 1896 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1897 if (ndp->ni_cnd.cn_flags & RDONLY) 1898 NFSVNO_SETEXRDONLY(&nes); 1899 else 1900 NFSVNO_EXINIT(&nes); 1901 nd->nd_repstat = nfsvno_accchk(vp, 1902 VWRITE, cred, &nes, p, 1903 NFSACCCHK_NOOVERRIDE, 1904 NFSACCCHK_VPISLOCKED, NULL); 1905 nd->nd_repstat = nfsrv_opencheck(clientid, 1906 stateidp, stp, vp, nd, p, nd->nd_repstat); 1907 if (!nd->nd_repstat) { 1908 tempsize = nvap->na_size; 1909 NFSVNO_ATTRINIT(nvap); 1910 nvap->na_size = tempsize; 1911 nd->nd_repstat = nfsvno_setattr(vp, 1912 nvap, cred, p, exp); 1913 } 1914 } else if (vp->v_type == VREG) { 1915 nd->nd_repstat = nfsrv_opencheck(clientid, 1916 stateidp, stp, vp, nd, p, nd->nd_repstat); 1917 } 1918 } 1919 } else if (done_namei) { 1920 /* 1921 * done_namei is set when nfsvno_namei() has completed 1922 * successfully, but a subsequent error was set in 1923 * nd_repstat. As such, cleanup of the nfsvno_namei() 1924 * results is required. 1925 */ 1926 nfsvno_relpathbuf(ndp); 1927 if (ndp->ni_dvp == ndp->ni_vp) 1928 vrele(ndp->ni_dvp); 1929 else 1930 vput(ndp->ni_dvp); 1931 if (ndp->ni_vp) 1932 vput(ndp->ni_vp); 1933 } 1934 *vpp = vp; 1935 1936 NFSEXITCODE2(0, nd); 1937 } 1938 1939 /* 1940 * Updates the file rev and sets the mtime and ctime 1941 * to the current clock time, returning the va_filerev and va_Xtime 1942 * values. 1943 * Return ESTALE to indicate the vnode is VIRF_DOOMED. 1944 */ 1945 int 1946 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1947 struct nfsrv_descript *nd, struct thread *p) 1948 { 1949 struct vattr va; 1950 1951 VATTR_NULL(&va); 1952 vfs_timestamp(&va.va_mtime); 1953 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1954 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1955 if (VN_IS_DOOMED(vp)) 1956 return (ESTALE); 1957 } 1958 (void) VOP_SETATTR(vp, &va, nd->nd_cred); 1959 (void) nfsvno_getattr(vp, nvap, nd, p, 1, NULL); 1960 return (0); 1961 } 1962 1963 /* 1964 * Glue routine to nfsv4_fillattr(). 1965 */ 1966 int 1967 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1968 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1969 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1970 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1971 { 1972 struct statfs *sf; 1973 int error; 1974 1975 sf = NULL; 1976 if (nfsrv_devidcnt > 0 && 1977 (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEAVAIL) || 1978 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEFREE) || 1979 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACETOTAL))) { 1980 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK | M_ZERO); 1981 error = nfsrv_pnfsstatfs(sf, mp); 1982 if (error != 0) { 1983 free(sf, M_TEMP); 1984 sf = NULL; 1985 } 1986 } 1987 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1988 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1989 mounted_on_fileno, sf); 1990 free(sf, M_TEMP); 1991 NFSEXITCODE2(0, nd); 1992 return (error); 1993 } 1994 1995 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1996 /* 1997 * nfs readdir service 1998 * - mallocs what it thinks is enough to read 1999 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 2000 * - calls VOP_READDIR() 2001 * - loops around building the reply 2002 * if the output generated exceeds count break out of loop 2003 * The NFSM_CLGET macro is used here so that the reply will be packed 2004 * tightly in mbuf clusters. 2005 * - it trims out records with d_fileno == 0 2006 * this doesn't matter for Unix clients, but they might confuse clients 2007 * for other os'. 2008 * - it trims out records with d_type == DT_WHT 2009 * these cannot be seen through NFS (unless we extend the protocol) 2010 * The alternate call nfsrvd_readdirplus() does lookups as well. 2011 * PS: The NFS protocol spec. does not clarify what the "count" byte 2012 * argument is a count of.. just name strings and file id's or the 2013 * entire reply rpc or ... 2014 * I tried just file name and id sizes and it confused the Sun client, 2015 * so I am using the full rpc size now. The "paranoia.." comment refers 2016 * to including the status longwords that are not a part of the dir. 2017 * "entry" structures, but are in the rpc. 2018 */ 2019 int 2020 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 2021 struct vnode *vp, struct nfsexstuff *exp) 2022 { 2023 struct dirent *dp; 2024 u_int32_t *tl; 2025 int dirlen; 2026 char *cpos, *cend, *rbuf; 2027 struct nfsvattr at; 2028 int nlen, error = 0, getret = 1; 2029 int siz, cnt, fullsiz, eofflag, ncookies; 2030 u_int64_t off, toff, verf __unused; 2031 uint64_t *cookies = NULL, *cookiep; 2032 struct uio io; 2033 struct iovec iv; 2034 int is_ufs; 2035 struct thread *p = curthread; 2036 2037 if (nd->nd_repstat) { 2038 nfsrv_postopattr(nd, getret, &at); 2039 goto out; 2040 } 2041 if (nd->nd_flag & ND_NFSV2) { 2042 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2043 off = fxdr_unsigned(u_quad_t, *tl++); 2044 } else { 2045 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2046 off = fxdr_hyper(tl); 2047 tl += 2; 2048 verf = fxdr_hyper(tl); 2049 tl += 2; 2050 } 2051 toff = off; 2052 cnt = fxdr_unsigned(int, *tl); 2053 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2054 cnt = NFS_SRVMAXDATA(nd); 2055 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2056 fullsiz = siz; 2057 if (nd->nd_flag & ND_NFSV3) { 2058 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, 2059 NULL); 2060 #if 0 2061 /* 2062 * va_filerev is not sufficient as a cookie verifier, 2063 * since it is not supposed to change when entries are 2064 * removed/added unless that offset cookies returned to 2065 * the client are no longer valid. 2066 */ 2067 if (!nd->nd_repstat && toff && verf != at.na_filerev) 2068 nd->nd_repstat = NFSERR_BAD_COOKIE; 2069 #endif 2070 } 2071 if (!nd->nd_repstat && vp->v_type != VDIR) 2072 nd->nd_repstat = NFSERR_NOTDIR; 2073 if (nd->nd_repstat == 0 && cnt == 0) { 2074 if (nd->nd_flag & ND_NFSV2) 2075 /* NFSv2 does not have NFSERR_TOOSMALL */ 2076 nd->nd_repstat = EPERM; 2077 else 2078 nd->nd_repstat = NFSERR_TOOSMALL; 2079 } 2080 if (!nd->nd_repstat) 2081 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2082 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2083 NFSACCCHK_VPISLOCKED, NULL); 2084 if (nd->nd_repstat) { 2085 vput(vp); 2086 if (nd->nd_flag & ND_NFSV3) 2087 nfsrv_postopattr(nd, getret, &at); 2088 goto out; 2089 } 2090 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2091 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2092 again: 2093 eofflag = 0; 2094 if (cookies) { 2095 free(cookies, M_TEMP); 2096 cookies = NULL; 2097 } 2098 2099 iv.iov_base = rbuf; 2100 iv.iov_len = siz; 2101 io.uio_iov = &iv; 2102 io.uio_iovcnt = 1; 2103 io.uio_offset = (off_t)off; 2104 io.uio_resid = siz; 2105 io.uio_segflg = UIO_SYSSPACE; 2106 io.uio_rw = UIO_READ; 2107 io.uio_td = NULL; 2108 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2109 &cookies); 2110 off = (u_int64_t)io.uio_offset; 2111 if (io.uio_resid) 2112 siz -= io.uio_resid; 2113 2114 if (!cookies && !nd->nd_repstat) 2115 nd->nd_repstat = NFSERR_PERM; 2116 if (nd->nd_flag & ND_NFSV3) { 2117 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2118 if (!nd->nd_repstat) 2119 nd->nd_repstat = getret; 2120 } 2121 2122 /* 2123 * Handles the failed cases. nd->nd_repstat == 0 past here. 2124 */ 2125 if (nd->nd_repstat) { 2126 vput(vp); 2127 free(rbuf, M_TEMP); 2128 if (cookies) 2129 free(cookies, M_TEMP); 2130 if (nd->nd_flag & ND_NFSV3) 2131 nfsrv_postopattr(nd, getret, &at); 2132 goto out; 2133 } 2134 /* 2135 * If nothing read, return eof 2136 * rpc reply 2137 */ 2138 if (siz == 0) { 2139 vput(vp); 2140 if (nd->nd_flag & ND_NFSV2) { 2141 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2142 } else { 2143 nfsrv_postopattr(nd, getret, &at); 2144 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2145 txdr_hyper(at.na_filerev, tl); 2146 tl += 2; 2147 } 2148 *tl++ = newnfs_false; 2149 *tl = newnfs_true; 2150 free(rbuf, M_TEMP); 2151 free(cookies, M_TEMP); 2152 goto out; 2153 } 2154 2155 /* 2156 * Check for degenerate cases of nothing useful read. 2157 * If so go try again 2158 */ 2159 cpos = rbuf; 2160 cend = rbuf + siz; 2161 dp = (struct dirent *)cpos; 2162 cookiep = cookies; 2163 2164 /* 2165 * For some reason FreeBSD's ufs_readdir() chooses to back the 2166 * directory offset up to a block boundary, so it is necessary to 2167 * skip over the records that precede the requested offset. This 2168 * requires the assumption that file offset cookies monotonically 2169 * increase. 2170 */ 2171 while (cpos < cend && ncookies > 0 && 2172 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2173 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 2174 cpos += dp->d_reclen; 2175 dp = (struct dirent *)cpos; 2176 cookiep++; 2177 ncookies--; 2178 } 2179 if (cpos >= cend || ncookies == 0) { 2180 siz = fullsiz; 2181 toff = off; 2182 goto again; 2183 } 2184 vput(vp); 2185 2186 /* 2187 * If cnt > MCLBYTES and the reply will not be saved, use 2188 * ext_pgs mbufs for TLS. 2189 * For NFSv4.0, we do not know for sure if the reply will 2190 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 2191 */ 2192 if (cnt > MCLBYTES && siz > MCLBYTES && 2193 (nd->nd_flag & (ND_TLS | ND_EXTPG | ND_SAVEREPLY)) == ND_TLS && 2194 (nd->nd_flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4) 2195 nd->nd_flag |= ND_EXTPG; 2196 2197 /* 2198 * dirlen is the size of the reply, including all XDR and must 2199 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 2200 * if the XDR should be included in "count", but to be safe, we do. 2201 * (Include the two booleans at the end of the reply in dirlen now.) 2202 */ 2203 if (nd->nd_flag & ND_NFSV3) { 2204 nfsrv_postopattr(nd, getret, &at); 2205 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2206 txdr_hyper(at.na_filerev, tl); 2207 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2208 } else { 2209 dirlen = 2 * NFSX_UNSIGNED; 2210 } 2211 2212 /* Loop through the records and build reply */ 2213 while (cpos < cend && ncookies > 0) { 2214 nlen = dp->d_namlen; 2215 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2216 nlen <= NFS_MAXNAMLEN) { 2217 if (nd->nd_flag & ND_NFSV3) 2218 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2219 else 2220 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2221 if (dirlen > cnt) { 2222 eofflag = 0; 2223 break; 2224 } 2225 2226 /* 2227 * Build the directory record xdr from 2228 * the dirent entry. 2229 */ 2230 if (nd->nd_flag & ND_NFSV3) { 2231 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2232 *tl++ = newnfs_true; 2233 *tl++ = 0; 2234 } else { 2235 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2236 *tl++ = newnfs_true; 2237 } 2238 *tl = txdr_unsigned(dp->d_fileno); 2239 (void) nfsm_strtom(nd, dp->d_name, nlen); 2240 if (nd->nd_flag & ND_NFSV3) { 2241 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2242 txdr_hyper(*cookiep, tl); 2243 } else { 2244 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 2245 *tl = txdr_unsigned(*cookiep); 2246 } 2247 } 2248 cpos += dp->d_reclen; 2249 dp = (struct dirent *)cpos; 2250 cookiep++; 2251 ncookies--; 2252 } 2253 if (cpos < cend) 2254 eofflag = 0; 2255 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2256 *tl++ = newnfs_false; 2257 if (eofflag) 2258 *tl = newnfs_true; 2259 else 2260 *tl = newnfs_false; 2261 free(rbuf, M_TEMP); 2262 free(cookies, M_TEMP); 2263 2264 out: 2265 NFSEXITCODE2(0, nd); 2266 return (0); 2267 nfsmout: 2268 vput(vp); 2269 NFSEXITCODE2(error, nd); 2270 return (error); 2271 } 2272 2273 /* 2274 * Readdirplus for V3 and Readdir for V4. 2275 */ 2276 int 2277 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 2278 struct vnode *vp, struct nfsexstuff *exp) 2279 { 2280 struct dirent *dp; 2281 u_int32_t *tl; 2282 int dirlen; 2283 char *cpos, *cend, *rbuf; 2284 struct vnode *nvp; 2285 fhandle_t nfh; 2286 struct nfsvattr nva, at, *nvap = &nva; 2287 struct mbuf *mb0, *mb1; 2288 struct nfsreferral *refp; 2289 int nlen, r, error = 0, getret = 1, usevget = 1; 2290 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 2291 caddr_t bpos0, bpos1; 2292 u_int64_t off, toff, verf __unused; 2293 uint64_t *cookies = NULL, *cookiep; 2294 nfsattrbit_t attrbits, rderrbits, savbits; 2295 struct uio io; 2296 struct iovec iv; 2297 struct componentname cn; 2298 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 2299 struct mount *mp, *new_mp; 2300 uint64_t mounted_on_fileno; 2301 struct thread *p = curthread; 2302 int bextpg0, bextpg1, bextpgsiz0, bextpgsiz1; 2303 2304 if (nd->nd_repstat) { 2305 nfsrv_postopattr(nd, getret, &at); 2306 goto out; 2307 } 2308 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2309 off = fxdr_hyper(tl); 2310 toff = off; 2311 tl += 2; 2312 verf = fxdr_hyper(tl); 2313 tl += 2; 2314 siz = fxdr_unsigned(int, *tl++); 2315 cnt = fxdr_unsigned(int, *tl); 2316 2317 /* 2318 * Use the server's maximum data transfer size as the upper bound 2319 * on reply datalen. 2320 */ 2321 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2322 cnt = NFS_SRVMAXDATA(nd); 2323 2324 /* 2325 * siz is a "hint" of how much directory information (name, fileid, 2326 * cookie) should be in the reply. At least one client "hints" 0, 2327 * so I set it to cnt for that case. I also round it up to the 2328 * next multiple of DIRBLKSIZ. 2329 * Since the size of a Readdirplus directory entry reply will always 2330 * be greater than a directory entry returned by VOP_READDIR(), it 2331 * does not make sense to read more than NFS_SRVMAXDATA() via 2332 * VOP_READDIR(). 2333 */ 2334 if (siz <= 0) 2335 siz = cnt; 2336 else if (siz > NFS_SRVMAXDATA(nd)) 2337 siz = NFS_SRVMAXDATA(nd); 2338 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2339 2340 if (nd->nd_flag & ND_NFSV4) { 2341 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 2342 if (error) 2343 goto nfsmout; 2344 NFSSET_ATTRBIT(&savbits, &attrbits); 2345 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits, nd); 2346 NFSZERO_ATTRBIT(&rderrbits); 2347 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 2348 } else { 2349 NFSZERO_ATTRBIT(&attrbits); 2350 } 2351 fullsiz = siz; 2352 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2353 #if 0 2354 if (!nd->nd_repstat) { 2355 if (off && verf != at.na_filerev) { 2356 /* 2357 * va_filerev is not sufficient as a cookie verifier, 2358 * since it is not supposed to change when entries are 2359 * removed/added unless that offset cookies returned to 2360 * the client are no longer valid. 2361 */ 2362 if (nd->nd_flag & ND_NFSV4) { 2363 nd->nd_repstat = NFSERR_NOTSAME; 2364 } else { 2365 nd->nd_repstat = NFSERR_BAD_COOKIE; 2366 } 2367 } 2368 } 2369 #endif 2370 if (!nd->nd_repstat && vp->v_type != VDIR) 2371 nd->nd_repstat = NFSERR_NOTDIR; 2372 if (!nd->nd_repstat && cnt == 0) 2373 nd->nd_repstat = NFSERR_TOOSMALL; 2374 if (!nd->nd_repstat) 2375 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2376 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2377 NFSACCCHK_VPISLOCKED, NULL); 2378 if (nd->nd_repstat) { 2379 vput(vp); 2380 if (nd->nd_flag & ND_NFSV3) 2381 nfsrv_postopattr(nd, getret, &at); 2382 goto out; 2383 } 2384 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2385 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 2386 2387 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2388 again: 2389 eofflag = 0; 2390 if (cookies) { 2391 free(cookies, M_TEMP); 2392 cookies = NULL; 2393 } 2394 2395 iv.iov_base = rbuf; 2396 iv.iov_len = siz; 2397 io.uio_iov = &iv; 2398 io.uio_iovcnt = 1; 2399 io.uio_offset = (off_t)off; 2400 io.uio_resid = siz; 2401 io.uio_segflg = UIO_SYSSPACE; 2402 io.uio_rw = UIO_READ; 2403 io.uio_td = NULL; 2404 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2405 &cookies); 2406 off = (u_int64_t)io.uio_offset; 2407 if (io.uio_resid) 2408 siz -= io.uio_resid; 2409 2410 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2411 2412 if (!cookies && !nd->nd_repstat) 2413 nd->nd_repstat = NFSERR_PERM; 2414 if (!nd->nd_repstat) 2415 nd->nd_repstat = getret; 2416 if (nd->nd_repstat) { 2417 vput(vp); 2418 if (cookies) 2419 free(cookies, M_TEMP); 2420 free(rbuf, M_TEMP); 2421 if (nd->nd_flag & ND_NFSV3) 2422 nfsrv_postopattr(nd, getret, &at); 2423 goto out; 2424 } 2425 /* 2426 * If nothing read, return eof 2427 * rpc reply 2428 */ 2429 if (siz == 0) { 2430 vput(vp); 2431 if (nd->nd_flag & ND_NFSV3) 2432 nfsrv_postopattr(nd, getret, &at); 2433 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2434 txdr_hyper(at.na_filerev, tl); 2435 tl += 2; 2436 *tl++ = newnfs_false; 2437 *tl = newnfs_true; 2438 free(cookies, M_TEMP); 2439 free(rbuf, M_TEMP); 2440 goto out; 2441 } 2442 2443 /* 2444 * Check for degenerate cases of nothing useful read. 2445 * If so go try again 2446 */ 2447 cpos = rbuf; 2448 cend = rbuf + siz; 2449 dp = (struct dirent *)cpos; 2450 cookiep = cookies; 2451 2452 /* 2453 * For some reason FreeBSD's ufs_readdir() chooses to back the 2454 * directory offset up to a block boundary, so it is necessary to 2455 * skip over the records that precede the requested offset. This 2456 * requires the assumption that file offset cookies monotonically 2457 * increase. 2458 */ 2459 while (cpos < cend && ncookies > 0 && 2460 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2461 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 2462 ((nd->nd_flag & ND_NFSV4) && 2463 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 2464 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 2465 cpos += dp->d_reclen; 2466 dp = (struct dirent *)cpos; 2467 cookiep++; 2468 ncookies--; 2469 } 2470 if (cpos >= cend || ncookies == 0) { 2471 siz = fullsiz; 2472 toff = off; 2473 goto again; 2474 } 2475 2476 /* 2477 * Busy the file system so that the mount point won't go away 2478 * and, as such, VFS_VGET() can be used safely. 2479 */ 2480 mp = vp->v_mount; 2481 vfs_ref(mp); 2482 NFSVOPUNLOCK(vp); 2483 nd->nd_repstat = vfs_busy(mp, 0); 2484 vfs_rel(mp); 2485 if (nd->nd_repstat != 0) { 2486 vrele(vp); 2487 free(cookies, M_TEMP); 2488 free(rbuf, M_TEMP); 2489 if (nd->nd_flag & ND_NFSV3) 2490 nfsrv_postopattr(nd, getret, &at); 2491 goto out; 2492 } 2493 2494 /* 2495 * Check to see if entries in this directory can be safely acquired 2496 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2497 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2498 * automount of the snapshot directory that is required will 2499 * be done. 2500 * This needs to be done here for NFSv4, since NFSv4 never does 2501 * a VFS_VGET() for "." or "..". 2502 */ 2503 if (is_zfs == 1) { 2504 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2505 if (r == EOPNOTSUPP) { 2506 usevget = 0; 2507 cn.cn_nameiop = LOOKUP; 2508 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2509 cn.cn_cred = nd->nd_cred; 2510 } else if (r == 0) 2511 vput(nvp); 2512 } 2513 2514 /* 2515 * If the reply is likely to exceed MCLBYTES and the reply will 2516 * not be saved, use ext_pgs mbufs for TLS. 2517 * It is difficult to predict how large each entry will be and 2518 * how many entries have been read, so just assume the directory 2519 * entries grow by a factor of 4 when attributes are included. 2520 * For NFSv4.0, we do not know for sure if the reply will 2521 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 2522 */ 2523 if (cnt > MCLBYTES && siz > MCLBYTES / 4 && 2524 (nd->nd_flag & (ND_TLS | ND_EXTPG | ND_SAVEREPLY)) == ND_TLS && 2525 (nd->nd_flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4) 2526 nd->nd_flag |= ND_EXTPG; 2527 2528 /* 2529 * Save this position, in case there is an error before one entry 2530 * is created. 2531 */ 2532 mb0 = nd->nd_mb; 2533 bpos0 = nd->nd_bpos; 2534 bextpg0 = nd->nd_bextpg; 2535 bextpgsiz0 = nd->nd_bextpgsiz; 2536 2537 /* 2538 * Fill in the first part of the reply. 2539 * dirlen is the reply length in bytes and cannot exceed cnt. 2540 * (Include the two booleans at the end of the reply in dirlen now, 2541 * so we recognize when we have exceeded cnt.) 2542 */ 2543 if (nd->nd_flag & ND_NFSV3) { 2544 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2545 nfsrv_postopattr(nd, getret, &at); 2546 } else { 2547 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2548 } 2549 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2550 txdr_hyper(at.na_filerev, tl); 2551 2552 /* 2553 * Save this position, in case there is an empty reply needed. 2554 */ 2555 mb1 = nd->nd_mb; 2556 bpos1 = nd->nd_bpos; 2557 bextpg1 = nd->nd_bextpg; 2558 bextpgsiz1 = nd->nd_bextpgsiz; 2559 2560 /* Loop through the records and build reply */ 2561 entrycnt = 0; 2562 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2563 nlen = dp->d_namlen; 2564 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2565 nlen <= NFS_MAXNAMLEN && 2566 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2567 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2568 || (nlen == 1 && dp->d_name[0] != '.'))) { 2569 /* 2570 * Save the current position in the reply, in case 2571 * this entry exceeds cnt. 2572 */ 2573 mb1 = nd->nd_mb; 2574 bpos1 = nd->nd_bpos; 2575 bextpg1 = nd->nd_bextpg; 2576 bextpgsiz1 = nd->nd_bextpgsiz; 2577 2578 /* 2579 * For readdir_and_lookup get the vnode using 2580 * the file number. 2581 */ 2582 nvp = NULL; 2583 refp = NULL; 2584 r = 0; 2585 at_root = 0; 2586 needs_unbusy = 0; 2587 new_mp = mp; 2588 mounted_on_fileno = (uint64_t)dp->d_fileno; 2589 if ((nd->nd_flag & ND_NFSV3) || 2590 NFSNONZERO_ATTRBIT(&savbits)) { 2591 if (nd->nd_flag & ND_NFSV4) 2592 refp = nfsv4root_getreferral(NULL, 2593 vp, dp->d_fileno); 2594 if (refp == NULL) { 2595 if (usevget) 2596 r = VFS_VGET(mp, dp->d_fileno, 2597 LK_SHARED, &nvp); 2598 else 2599 r = EOPNOTSUPP; 2600 if (r == EOPNOTSUPP) { 2601 if (usevget) { 2602 usevget = 0; 2603 cn.cn_nameiop = LOOKUP; 2604 cn.cn_lkflags = 2605 LK_SHARED | 2606 LK_RETRY; 2607 cn.cn_cred = 2608 nd->nd_cred; 2609 } 2610 cn.cn_nameptr = dp->d_name; 2611 cn.cn_namelen = nlen; 2612 cn.cn_flags = ISLASTCN | 2613 NOFOLLOW | LOCKLEAF; 2614 if (nlen == 2 && 2615 dp->d_name[0] == '.' && 2616 dp->d_name[1] == '.') 2617 cn.cn_flags |= 2618 ISDOTDOT; 2619 if (NFSVOPLOCK(vp, LK_SHARED) 2620 != 0) { 2621 nd->nd_repstat = EPERM; 2622 break; 2623 } 2624 if ((vp->v_vflag & VV_ROOT) != 0 2625 && (cn.cn_flags & ISDOTDOT) 2626 != 0) { 2627 vref(vp); 2628 nvp = vp; 2629 r = 0; 2630 } else { 2631 r = VOP_LOOKUP(vp, &nvp, 2632 &cn); 2633 if (vp != nvp) 2634 NFSVOPUNLOCK(vp); 2635 } 2636 } 2637 2638 /* 2639 * For NFSv4, check to see if nvp is 2640 * a mount point and get the mount 2641 * point vnode, as required. 2642 */ 2643 if (r == 0 && 2644 nfsrv_enable_crossmntpt != 0 && 2645 (nd->nd_flag & ND_NFSV4) != 0 && 2646 nvp->v_type == VDIR && 2647 nvp->v_mountedhere != NULL) { 2648 new_mp = nvp->v_mountedhere; 2649 r = vfs_busy(new_mp, 0); 2650 vput(nvp); 2651 nvp = NULL; 2652 if (r == 0) { 2653 r = VFS_ROOT(new_mp, 2654 LK_SHARED, &nvp); 2655 needs_unbusy = 1; 2656 if (r == 0) 2657 at_root = 1; 2658 } 2659 } 2660 } 2661 2662 /* 2663 * If we failed to look up the entry, then it 2664 * has become invalid, most likely removed. 2665 */ 2666 if (r != 0) { 2667 if (needs_unbusy) 2668 vfs_unbusy(new_mp); 2669 goto invalid; 2670 } 2671 KASSERT(refp != NULL || nvp != NULL, 2672 ("%s: undetected lookup error", __func__)); 2673 2674 if (refp == NULL && 2675 ((nd->nd_flag & ND_NFSV3) || 2676 NFSNONZERO_ATTRBIT(&attrbits))) { 2677 r = nfsvno_getfh(nvp, &nfh, p); 2678 if (!r) 2679 r = nfsvno_getattr(nvp, nvap, nd, p, 2680 1, &attrbits); 2681 if (r == 0 && is_zfs == 1 && 2682 nfsrv_enable_crossmntpt != 0 && 2683 (nd->nd_flag & ND_NFSV4) != 0 && 2684 nvp->v_type == VDIR && 2685 vp->v_mount != nvp->v_mount) { 2686 /* 2687 * For a ZFS snapshot, there is a 2688 * pseudo mount that does not set 2689 * v_mountedhere, so it needs to 2690 * be detected via a different 2691 * mount structure. 2692 */ 2693 at_root = 1; 2694 if (new_mp == mp) 2695 new_mp = nvp->v_mount; 2696 } 2697 } 2698 2699 /* 2700 * If we failed to get attributes of the entry, 2701 * then just skip it for NFSv3 (the traditional 2702 * behavior in the old NFS server). 2703 * For NFSv4 the behavior is controlled by 2704 * RDATTRERROR: we either ignore the error or 2705 * fail the request. 2706 * The exception is EOPNOTSUPP, which can be 2707 * returned by nfsvno_getfh() for certain 2708 * file systems, such as devfs. This indicates 2709 * that the file system cannot be exported, 2710 * so just skip over the entry. 2711 * Note that RDATTRERROR is never set for NFSv3. 2712 */ 2713 if (r != 0) { 2714 if (!NFSISSET_ATTRBIT(&attrbits, 2715 NFSATTRBIT_RDATTRERROR) || 2716 r == EOPNOTSUPP) { 2717 vput(nvp); 2718 if (needs_unbusy != 0) 2719 vfs_unbusy(new_mp); 2720 if ((nd->nd_flag & ND_NFSV3) || 2721 r == EOPNOTSUPP) 2722 goto invalid; 2723 nd->nd_repstat = r; 2724 break; 2725 } 2726 } 2727 } 2728 2729 /* 2730 * Build the directory record xdr 2731 */ 2732 if (nd->nd_flag & ND_NFSV3) { 2733 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2734 *tl++ = newnfs_true; 2735 *tl++ = 0; 2736 *tl = txdr_unsigned(dp->d_fileno); 2737 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2738 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2739 txdr_hyper(*cookiep, tl); 2740 nfsrv_postopattr(nd, 0, nvap); 2741 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2742 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2743 if (nvp != NULL) 2744 vput(nvp); 2745 } else { 2746 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2747 *tl++ = newnfs_true; 2748 txdr_hyper(*cookiep, tl); 2749 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2750 if (nvp != NULL) { 2751 supports_nfsv4acls = 2752 nfs_supportsnfsv4acls(nvp); 2753 NFSVOPUNLOCK(nvp); 2754 } else 2755 supports_nfsv4acls = 0; 2756 if (refp != NULL) { 2757 dirlen += nfsrv_putreferralattr(nd, 2758 &savbits, refp, 0, 2759 &nd->nd_repstat); 2760 if (nd->nd_repstat) { 2761 if (nvp != NULL) 2762 vrele(nvp); 2763 if (needs_unbusy != 0) 2764 vfs_unbusy(new_mp); 2765 break; 2766 } 2767 } else if (r) { 2768 dirlen += nfsvno_fillattr(nd, new_mp, 2769 nvp, nvap, &nfh, r, &rderrbits, 2770 nd->nd_cred, p, isdgram, 0, 2771 supports_nfsv4acls, at_root, 2772 mounted_on_fileno); 2773 } else { 2774 dirlen += nfsvno_fillattr(nd, new_mp, 2775 nvp, nvap, &nfh, r, &attrbits, 2776 nd->nd_cred, p, isdgram, 0, 2777 supports_nfsv4acls, at_root, 2778 mounted_on_fileno); 2779 } 2780 if (nvp != NULL) 2781 vrele(nvp); 2782 dirlen += (3 * NFSX_UNSIGNED); 2783 } 2784 if (needs_unbusy != 0) 2785 vfs_unbusy(new_mp); 2786 if (dirlen <= cnt) 2787 entrycnt++; 2788 } 2789 invalid: 2790 cpos += dp->d_reclen; 2791 dp = (struct dirent *)cpos; 2792 cookiep++; 2793 ncookies--; 2794 } 2795 vrele(vp); 2796 vfs_unbusy(mp); 2797 2798 /* 2799 * If dirlen > cnt, we must strip off the last entry. If that 2800 * results in an empty reply, report NFSERR_TOOSMALL. 2801 */ 2802 if (dirlen > cnt || nd->nd_repstat) { 2803 if (!nd->nd_repstat && entrycnt == 0) 2804 nd->nd_repstat = NFSERR_TOOSMALL; 2805 if (nd->nd_repstat) { 2806 nfsm_trimtrailing(nd, mb0, bpos0, bextpg0, bextpgsiz0); 2807 if (nd->nd_flag & ND_NFSV3) 2808 nfsrv_postopattr(nd, getret, &at); 2809 } else 2810 nfsm_trimtrailing(nd, mb1, bpos1, bextpg1, bextpgsiz1); 2811 eofflag = 0; 2812 } else if (cpos < cend) 2813 eofflag = 0; 2814 if (!nd->nd_repstat) { 2815 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2816 *tl++ = newnfs_false; 2817 if (eofflag) 2818 *tl = newnfs_true; 2819 else 2820 *tl = newnfs_false; 2821 } 2822 free(cookies, M_TEMP); 2823 free(rbuf, M_TEMP); 2824 2825 out: 2826 NFSEXITCODE2(0, nd); 2827 return (0); 2828 nfsmout: 2829 vput(vp); 2830 NFSEXITCODE2(error, nd); 2831 return (error); 2832 } 2833 2834 /* 2835 * Get the settable attributes out of the mbuf list. 2836 * (Return 0 or EBADRPC) 2837 */ 2838 int 2839 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2840 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2841 { 2842 u_int32_t *tl; 2843 struct nfsv2_sattr *sp; 2844 int error = 0, toclient = 0; 2845 2846 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2847 case ND_NFSV2: 2848 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2849 /* 2850 * Some old clients didn't fill in the high order 16bits. 2851 * --> check the low order 2 bytes for 0xffff 2852 */ 2853 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2854 nvap->na_mode = nfstov_mode(sp->sa_mode); 2855 if (sp->sa_uid != newnfs_xdrneg1) 2856 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2857 if (sp->sa_gid != newnfs_xdrneg1) 2858 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2859 if (sp->sa_size != newnfs_xdrneg1) 2860 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2861 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2862 #ifdef notyet 2863 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2864 #else 2865 nvap->na_atime.tv_sec = 2866 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2867 nvap->na_atime.tv_nsec = 0; 2868 #endif 2869 } 2870 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2871 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2872 break; 2873 case ND_NFSV3: 2874 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2875 if (*tl == newnfs_true) { 2876 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2877 nvap->na_mode = nfstov_mode(*tl); 2878 } 2879 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2880 if (*tl == newnfs_true) { 2881 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2882 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2883 } 2884 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2885 if (*tl == newnfs_true) { 2886 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2887 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2888 } 2889 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2890 if (*tl == newnfs_true) { 2891 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2892 nvap->na_size = fxdr_hyper(tl); 2893 } 2894 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2895 switch (fxdr_unsigned(int, *tl)) { 2896 case NFSV3SATTRTIME_TOCLIENT: 2897 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2898 fxdr_nfsv3time(tl, &nvap->na_atime); 2899 toclient = 1; 2900 break; 2901 case NFSV3SATTRTIME_TOSERVER: 2902 vfs_timestamp(&nvap->na_atime); 2903 nvap->na_vaflags |= VA_UTIMES_NULL; 2904 break; 2905 } 2906 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2907 switch (fxdr_unsigned(int, *tl)) { 2908 case NFSV3SATTRTIME_TOCLIENT: 2909 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2910 fxdr_nfsv3time(tl, &nvap->na_mtime); 2911 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2912 break; 2913 case NFSV3SATTRTIME_TOSERVER: 2914 vfs_timestamp(&nvap->na_mtime); 2915 if (!toclient) 2916 nvap->na_vaflags |= VA_UTIMES_NULL; 2917 break; 2918 } 2919 break; 2920 case ND_NFSV4: 2921 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2922 } 2923 nfsmout: 2924 NFSEXITCODE2(error, nd); 2925 return (error); 2926 } 2927 2928 /* 2929 * Handle the setable attributes for V4. 2930 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2931 */ 2932 int 2933 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2934 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2935 { 2936 u_int32_t *tl; 2937 int attrsum = 0; 2938 int i, j; 2939 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2940 int moderet, toclient = 0; 2941 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2942 uid_t uid; 2943 gid_t gid; 2944 u_short mode, mask; /* Same type as va_mode. */ 2945 struct vattr va; 2946 2947 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2948 if (error) 2949 goto nfsmout; 2950 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2951 attrsize = fxdr_unsigned(int, *tl); 2952 2953 /* 2954 * Loop around getting the setable attributes. If an unsupported 2955 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2956 */ 2957 if (retnotsup) { 2958 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2959 bitpos = NFSATTRBIT_MAX; 2960 } else { 2961 bitpos = 0; 2962 } 2963 moderet = 0; 2964 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2965 if (attrsum > attrsize) { 2966 error = NFSERR_BADXDR; 2967 goto nfsmout; 2968 } 2969 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2970 switch (bitpos) { 2971 case NFSATTRBIT_SIZE: 2972 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2973 if (vp != NULL && vp->v_type != VREG) { 2974 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2975 NFSERR_INVAL; 2976 goto nfsmout; 2977 } 2978 nvap->na_size = fxdr_hyper(tl); 2979 attrsum += NFSX_HYPER; 2980 break; 2981 case NFSATTRBIT_ACL: 2982 error = nfsrv_dissectacl(nd, aclp, true, &aceerr, 2983 &aclsize, p); 2984 if (error) 2985 goto nfsmout; 2986 if (aceerr && !nd->nd_repstat) 2987 nd->nd_repstat = aceerr; 2988 attrsum += aclsize; 2989 break; 2990 case NFSATTRBIT_ARCHIVE: 2991 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2992 if (!nd->nd_repstat) 2993 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2994 attrsum += NFSX_UNSIGNED; 2995 break; 2996 case NFSATTRBIT_HIDDEN: 2997 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2998 if (!nd->nd_repstat) 2999 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3000 attrsum += NFSX_UNSIGNED; 3001 break; 3002 case NFSATTRBIT_MIMETYPE: 3003 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3004 i = fxdr_unsigned(int, *tl); 3005 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3006 if (error) 3007 goto nfsmout; 3008 if (!nd->nd_repstat) 3009 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3010 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 3011 break; 3012 case NFSATTRBIT_MODE: 3013 moderet = NFSERR_INVAL; /* Can't do MODESETMASKED. */ 3014 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3015 nvap->na_mode = nfstov_mode(*tl); 3016 attrsum += NFSX_UNSIGNED; 3017 break; 3018 case NFSATTRBIT_OWNER: 3019 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3020 j = fxdr_unsigned(int, *tl); 3021 if (j < 0) { 3022 error = NFSERR_BADXDR; 3023 goto nfsmout; 3024 } 3025 if (j > NFSV4_SMALLSTR) 3026 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 3027 else 3028 cp = namestr; 3029 error = nfsrv_mtostr(nd, cp, j); 3030 if (error) { 3031 if (j > NFSV4_SMALLSTR) 3032 free(cp, M_NFSSTRING); 3033 goto nfsmout; 3034 } 3035 if (!nd->nd_repstat) { 3036 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, 3037 &uid); 3038 if (!nd->nd_repstat) 3039 nvap->na_uid = uid; 3040 } 3041 if (j > NFSV4_SMALLSTR) 3042 free(cp, M_NFSSTRING); 3043 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 3044 break; 3045 case NFSATTRBIT_OWNERGROUP: 3046 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3047 j = fxdr_unsigned(int, *tl); 3048 if (j < 0) { 3049 error = NFSERR_BADXDR; 3050 goto nfsmout; 3051 } 3052 if (j > NFSV4_SMALLSTR) 3053 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 3054 else 3055 cp = namestr; 3056 error = nfsrv_mtostr(nd, cp, j); 3057 if (error) { 3058 if (j > NFSV4_SMALLSTR) 3059 free(cp, M_NFSSTRING); 3060 goto nfsmout; 3061 } 3062 if (!nd->nd_repstat) { 3063 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, 3064 &gid); 3065 if (!nd->nd_repstat) 3066 nvap->na_gid = gid; 3067 } 3068 if (j > NFSV4_SMALLSTR) 3069 free(cp, M_NFSSTRING); 3070 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 3071 break; 3072 case NFSATTRBIT_SYSTEM: 3073 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3074 if (!nd->nd_repstat) 3075 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3076 attrsum += NFSX_UNSIGNED; 3077 break; 3078 case NFSATTRBIT_TIMEACCESSSET: 3079 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3080 attrsum += NFSX_UNSIGNED; 3081 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 3082 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3083 fxdr_nfsv4time(tl, &nvap->na_atime); 3084 toclient = 1; 3085 attrsum += NFSX_V4TIME; 3086 } else { 3087 vfs_timestamp(&nvap->na_atime); 3088 nvap->na_vaflags |= VA_UTIMES_NULL; 3089 } 3090 break; 3091 case NFSATTRBIT_TIMEBACKUP: 3092 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3093 if (!nd->nd_repstat) 3094 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3095 attrsum += NFSX_V4TIME; 3096 break; 3097 case NFSATTRBIT_TIMECREATE: 3098 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3099 fxdr_nfsv4time(tl, &nvap->na_btime); 3100 attrsum += NFSX_V4TIME; 3101 break; 3102 case NFSATTRBIT_TIMEMODIFYSET: 3103 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3104 attrsum += NFSX_UNSIGNED; 3105 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 3106 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3107 fxdr_nfsv4time(tl, &nvap->na_mtime); 3108 nvap->na_vaflags &= ~VA_UTIMES_NULL; 3109 attrsum += NFSX_V4TIME; 3110 } else { 3111 vfs_timestamp(&nvap->na_mtime); 3112 if (!toclient) 3113 nvap->na_vaflags |= VA_UTIMES_NULL; 3114 } 3115 break; 3116 case NFSATTRBIT_MODESETMASKED: 3117 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 3118 mode = fxdr_unsigned(u_short, *tl++); 3119 mask = fxdr_unsigned(u_short, *tl); 3120 /* 3121 * vp == NULL implies an Open/Create operation. 3122 * This attribute can only be used for Setattr and 3123 * only for NFSv4.1 or higher. 3124 * If moderet != 0, a mode attribute has also been 3125 * specified and this attribute cannot be done in the 3126 * same Setattr operation. 3127 */ 3128 if ((nd->nd_flag & ND_NFSV41) == 0) 3129 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3130 else if ((mode & ~07777) != 0 || (mask & ~07777) != 0 || 3131 vp == NULL) 3132 nd->nd_repstat = NFSERR_INVAL; 3133 else if (moderet == 0) 3134 moderet = VOP_GETATTR(vp, &va, nd->nd_cred); 3135 if (moderet == 0) 3136 nvap->na_mode = (mode & mask) | 3137 (va.va_mode & ~mask); 3138 else 3139 nd->nd_repstat = moderet; 3140 attrsum += 2 * NFSX_UNSIGNED; 3141 break; 3142 default: 3143 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3144 /* 3145 * set bitpos so we drop out of the loop. 3146 */ 3147 bitpos = NFSATTRBIT_MAX; 3148 break; 3149 } 3150 } 3151 3152 /* 3153 * some clients pad the attrlist, so we need to skip over the 3154 * padding. 3155 */ 3156 if (attrsum > attrsize) { 3157 error = NFSERR_BADXDR; 3158 } else { 3159 attrsize = NFSM_RNDUP(attrsize); 3160 if (attrsum < attrsize) 3161 error = nfsm_advance(nd, attrsize - attrsum, -1); 3162 } 3163 nfsmout: 3164 NFSEXITCODE2(error, nd); 3165 return (error); 3166 } 3167 3168 /* 3169 * Check/setup export credentials. 3170 */ 3171 int 3172 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 3173 struct ucred *credanon, bool testsec) 3174 { 3175 int error; 3176 3177 /* 3178 * Check/setup credentials. 3179 */ 3180 if (nd->nd_flag & ND_GSS) 3181 exp->nes_exflag &= ~MNT_EXPORTANON; 3182 3183 /* 3184 * Check to see if the operation is allowed for this security flavor. 3185 */ 3186 error = 0; 3187 if (testsec) { 3188 error = nfsvno_testexp(nd, exp); 3189 if (error != 0) 3190 goto out; 3191 } 3192 3193 /* 3194 * Check to see if the file system is exported V4 only. 3195 */ 3196 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 3197 error = NFSERR_PROGNOTV4; 3198 goto out; 3199 } 3200 3201 /* 3202 * Now, map the user credentials. 3203 * (Note that ND_AUTHNONE will only be set for an NFSv3 3204 * Fsinfo RPC. If set for anything else, this code might need 3205 * to change.) 3206 */ 3207 if (NFSVNO_EXPORTED(exp)) { 3208 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 3209 NFSVNO_EXPORTANON(exp) || 3210 (nd->nd_flag & ND_AUTHNONE) != 0) { 3211 nd->nd_cred->cr_uid = credanon->cr_uid; 3212 nd->nd_cred->cr_gid = credanon->cr_gid; 3213 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 3214 credanon->cr_groups); 3215 } else if ((nd->nd_flag & ND_GSS) == 0) { 3216 /* 3217 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 3218 * if there is a replacement credential with a group 3219 * list set up by "nfsuserd -manage-gids". 3220 * If there is no replacement, nfsrv_getgrpscred() 3221 * simply returns its argument. 3222 */ 3223 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 3224 } 3225 } 3226 3227 out: 3228 NFSEXITCODE2(error, nd); 3229 return (error); 3230 } 3231 3232 /* 3233 * Check exports. 3234 */ 3235 int 3236 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 3237 struct ucred **credp) 3238 { 3239 int error; 3240 3241 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3242 &exp->nes_numsecflavor, exp->nes_secflavors); 3243 if (error) { 3244 if (nfs_rootfhset) { 3245 exp->nes_exflag = 0; 3246 exp->nes_numsecflavor = 0; 3247 error = 0; 3248 } 3249 } else if (exp->nes_numsecflavor < 1 || exp->nes_numsecflavor > 3250 MAXSECFLAVORS) { 3251 printf("nfsvno_checkexp: numsecflavors out of range\n"); 3252 exp->nes_numsecflavor = 0; 3253 error = EACCES; 3254 } 3255 NFSEXITCODE(error); 3256 return (error); 3257 } 3258 3259 /* 3260 * Get a vnode for a file handle and export stuff. 3261 */ 3262 int 3263 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 3264 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 3265 struct ucred **credp) 3266 { 3267 int error; 3268 3269 *credp = NULL; 3270 exp->nes_numsecflavor = 0; 3271 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 3272 if (error != 0) 3273 /* Make sure the server replies ESTALE to the client. */ 3274 error = ESTALE; 3275 if (nam && !error) { 3276 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3277 &exp->nes_numsecflavor, exp->nes_secflavors); 3278 if (error) { 3279 if (nfs_rootfhset) { 3280 exp->nes_exflag = 0; 3281 exp->nes_numsecflavor = 0; 3282 error = 0; 3283 } else { 3284 vput(*vpp); 3285 } 3286 } else if (exp->nes_numsecflavor < 1 || exp->nes_numsecflavor > 3287 MAXSECFLAVORS) { 3288 printf("nfsvno_fhtovp: numsecflavors out of range\n"); 3289 exp->nes_numsecflavor = 0; 3290 error = EACCES; 3291 vput(*vpp); 3292 } 3293 } 3294 NFSEXITCODE(error); 3295 return (error); 3296 } 3297 3298 /* 3299 * nfsd_fhtovp() - convert a fh to a vnode ptr 3300 * - look up fsid in mount list (if not found ret error) 3301 * - get vp and export rights by calling nfsvno_fhtovp() 3302 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 3303 * for AUTH_SYS 3304 * - if mpp != NULL, return the mount point so that it can 3305 * be used for vn_finished_write() by the caller 3306 */ 3307 void 3308 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 3309 struct vnode **vpp, struct nfsexstuff *exp, 3310 struct mount **mpp, int startwrite, int nextop) 3311 { 3312 struct mount *mp, *mpw; 3313 struct ucred *credanon; 3314 fhandle_t *fhp; 3315 int error; 3316 3317 if (mpp != NULL) 3318 *mpp = NULL; 3319 *vpp = NULL; 3320 fhp = (fhandle_t *)nfp->nfsrvfh_data; 3321 mp = vfs_busyfs(&fhp->fh_fsid); 3322 if (mp == NULL) { 3323 nd->nd_repstat = ESTALE; 3324 goto out; 3325 } 3326 3327 if (startwrite) { 3328 mpw = mp; 3329 error = vn_start_write(NULL, &mpw, V_WAIT); 3330 if (error != 0) { 3331 mpw = NULL; 3332 vfs_unbusy(mp); 3333 nd->nd_repstat = ESTALE; 3334 goto out; 3335 } 3336 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 3337 lktype = LK_EXCLUSIVE; 3338 } else 3339 mpw = NULL; 3340 3341 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 3342 &credanon); 3343 vfs_unbusy(mp); 3344 3345 /* 3346 * For NFSv4 without a pseudo root fs, unexported file handles 3347 * can be returned, so that Lookup works everywhere. 3348 */ 3349 if (!nd->nd_repstat && exp->nes_exflag == 0 && 3350 !(nd->nd_flag & ND_NFSV4)) { 3351 vput(*vpp); 3352 *vpp = NULL; 3353 nd->nd_repstat = EACCES; 3354 } 3355 3356 /* 3357 * Personally, I've never seen any point in requiring a 3358 * reserved port#, since only in the rare case where the 3359 * clients are all boxes with secure system privileges, 3360 * does it provide any enhanced security, but... some people 3361 * believe it to be useful and keep putting this code back in. 3362 * (There is also some "security checker" out there that 3363 * complains if the nfs server doesn't enforce this.) 3364 * However, note the following: 3365 * RFC3530 (NFSv4) specifies that a reserved port# not be 3366 * required. 3367 * RFC2623 recommends that, if a reserved port# is checked for, 3368 * that there be a way to turn that off--> ifdef'd. 3369 */ 3370 #ifdef NFS_REQRSVPORT 3371 if (!nd->nd_repstat) { 3372 struct sockaddr_in *saddr; 3373 struct sockaddr_in6 *saddr6; 3374 3375 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3376 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 3377 if (!(nd->nd_flag & ND_NFSV4) && 3378 ((saddr->sin_family == AF_INET && 3379 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 3380 (saddr6->sin6_family == AF_INET6 && 3381 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 3382 vput(*vpp); 3383 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3384 } 3385 } 3386 #endif /* NFS_REQRSVPORT */ 3387 3388 /* 3389 * Check/setup credentials. 3390 */ 3391 if (!nd->nd_repstat) { 3392 nd->nd_saveduid = nd->nd_cred->cr_uid; 3393 nd->nd_repstat = nfsd_excred(nd, exp, credanon, 3394 nfsrv_checkwrongsec(nd, nextop, (*vpp)->v_type)); 3395 if (nd->nd_repstat) 3396 vput(*vpp); 3397 } 3398 if (credanon != NULL) 3399 crfree(credanon); 3400 if (nd->nd_repstat) { 3401 vn_finished_write(mpw); 3402 *vpp = NULL; 3403 } else if (mpp != NULL) { 3404 *mpp = mpw; 3405 } 3406 3407 out: 3408 NFSEXITCODE2(0, nd); 3409 } 3410 3411 /* 3412 * glue for fp. 3413 */ 3414 static int 3415 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 3416 { 3417 struct filedesc *fdp; 3418 struct file *fp; 3419 int error = 0; 3420 3421 fdp = p->td_proc->p_fd; 3422 if (fd < 0 || fd >= fdp->fd_nfiles || 3423 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 3424 error = EBADF; 3425 goto out; 3426 } 3427 *fpp = fp; 3428 3429 out: 3430 NFSEXITCODE(error); 3431 return (error); 3432 } 3433 3434 /* 3435 * Called from nfssvc() to update the exports list. Just call 3436 * vfs_export(). This has to be done, since the v4 root fake fs isn't 3437 * in the mount list. 3438 */ 3439 int 3440 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 3441 { 3442 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 3443 int error = 0; 3444 struct nameidata nd; 3445 fhandle_t fh; 3446 3447 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 3448 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 3449 nfs_rootfhset = 0; 3450 else if (error == 0) { 3451 if (nfsexargp->fspec == NULL) { 3452 error = EPERM; 3453 goto out; 3454 } 3455 /* 3456 * If fspec != NULL, this is the v4root path. 3457 */ 3458 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, nfsexargp->fspec); 3459 if ((error = namei(&nd)) != 0) 3460 goto out; 3461 error = nfsvno_getfh(nd.ni_vp, &fh, p); 3462 vrele(nd.ni_vp); 3463 if (!error) { 3464 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 3465 NFSBCOPY((caddr_t)&fh, 3466 nfs_rootfh.nfsrvfh_data, 3467 sizeof (fhandle_t)); 3468 nfs_rootfhset = 1; 3469 } 3470 } 3471 3472 out: 3473 NFSEXITCODE(error); 3474 return (error); 3475 } 3476 3477 /* 3478 * This function needs to test to see if the system is near its limit 3479 * for memory allocation via malloc() or mget() and return True iff 3480 * either of these resources are near their limit. 3481 * XXX (For now, this is just a stub.) 3482 */ 3483 int nfsrv_testmalloclimit = 0; 3484 int 3485 nfsrv_mallocmget_limit(void) 3486 { 3487 static int printmesg = 0; 3488 static int testval = 1; 3489 3490 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 3491 if ((printmesg++ % 100) == 0) 3492 printf("nfsd: malloc/mget near limit\n"); 3493 return (1); 3494 } 3495 return (0); 3496 } 3497 3498 /* 3499 * BSD specific initialization of a mount point. 3500 */ 3501 void 3502 nfsd_mntinit(void) 3503 { 3504 static int inited = 0; 3505 3506 if (inited) 3507 return; 3508 inited = 1; 3509 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 3510 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 3511 TAILQ_INIT(&nfsv4root_mnt.mnt_lazyvnodelist); 3512 nfsv4root_mnt.mnt_export = NULL; 3513 TAILQ_INIT(&nfsv4root_opt); 3514 TAILQ_INIT(&nfsv4root_newopt); 3515 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 3516 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 3517 nfsv4root_mnt.mnt_nvnodelistsize = 0; 3518 nfsv4root_mnt.mnt_lazyvnodelistsize = 0; 3519 } 3520 3521 static void 3522 nfsd_timer(void *arg) 3523 { 3524 3525 nfsrv_servertimer(); 3526 callout_reset_sbt(&nfsd_callout, SBT_1S, SBT_1S, nfsd_timer, NULL, 0); 3527 } 3528 3529 /* 3530 * Get a vnode for a file handle, without checking exports, etc. 3531 */ 3532 struct vnode * 3533 nfsvno_getvp(fhandle_t *fhp) 3534 { 3535 struct mount *mp; 3536 struct vnode *vp; 3537 int error; 3538 3539 mp = vfs_busyfs(&fhp->fh_fsid); 3540 if (mp == NULL) 3541 return (NULL); 3542 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 3543 vfs_unbusy(mp); 3544 if (error) 3545 return (NULL); 3546 return (vp); 3547 } 3548 3549 /* 3550 * Do a local VOP_ADVLOCK(). 3551 */ 3552 int 3553 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3554 u_int64_t end, struct thread *td) 3555 { 3556 int error = 0; 3557 struct flock fl; 3558 u_int64_t tlen; 3559 3560 if (nfsrv_dolocallocks == 0) 3561 goto out; 3562 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3563 3564 fl.l_whence = SEEK_SET; 3565 fl.l_type = ftype; 3566 fl.l_start = (off_t)first; 3567 if (end == NFS64BITSSET) { 3568 fl.l_len = 0; 3569 } else { 3570 tlen = end - first; 3571 fl.l_len = (off_t)tlen; 3572 } 3573 /* 3574 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3575 * values for all calls, so that all locks will be held by the 3576 * nfsd server. (The nfsd server handles conflicts between the 3577 * various clients.) 3578 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3579 * bytes, so it can't be put in l_sysid. 3580 */ 3581 if (nfsv4_sysid == 0) 3582 nfsv4_sysid = nlm_acquire_next_sysid(); 3583 fl.l_pid = (pid_t)0; 3584 fl.l_sysid = (int)nfsv4_sysid; 3585 3586 if (ftype == F_UNLCK) 3587 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3588 (F_POSIX | F_REMOTE)); 3589 else 3590 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3591 (F_POSIX | F_REMOTE)); 3592 3593 out: 3594 NFSEXITCODE(error); 3595 return (error); 3596 } 3597 3598 /* 3599 * Check the nfsv4 root exports. 3600 */ 3601 int 3602 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3603 { 3604 struct ucred *credanon; 3605 int error = 0, numsecflavor, secflavors[MAXSECFLAVORS], i; 3606 uint64_t exflags; 3607 3608 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3609 &credanon, &numsecflavor, secflavors); 3610 if (error) { 3611 error = NFSERR_PROGUNAVAIL; 3612 goto out; 3613 } 3614 if (credanon != NULL) 3615 crfree(credanon); 3616 for (i = 0; i < numsecflavor; i++) { 3617 if (secflavors[i] == AUTH_SYS) 3618 nd->nd_flag |= ND_EXAUTHSYS; 3619 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3620 nd->nd_flag |= ND_EXGSS; 3621 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3622 nd->nd_flag |= ND_EXGSSINTEGRITY; 3623 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3624 nd->nd_flag |= ND_EXGSSPRIVACY; 3625 } 3626 3627 /* And set ND_EXxx flags for TLS. */ 3628 if ((exflags & MNT_EXTLS) != 0) { 3629 nd->nd_flag |= ND_EXTLS; 3630 if ((exflags & MNT_EXTLSCERT) != 0) 3631 nd->nd_flag |= ND_EXTLSCERT; 3632 if ((exflags & MNT_EXTLSCERTUSER) != 0) 3633 nd->nd_flag |= ND_EXTLSCERTUSER; 3634 } 3635 3636 out: 3637 NFSEXITCODE(error); 3638 return (error); 3639 } 3640 3641 /* 3642 * Nfs server pseudo system call for the nfsd's 3643 */ 3644 /* 3645 * MPSAFE 3646 */ 3647 static int 3648 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3649 { 3650 struct file *fp; 3651 struct nfsd_addsock_args sockarg; 3652 struct nfsd_nfsd_args nfsdarg; 3653 struct nfsd_nfsd_oargs onfsdarg; 3654 struct nfsd_pnfsd_args pnfsdarg; 3655 struct vnode *vp, *nvp, *curdvp; 3656 struct pnfsdsfile *pf; 3657 struct nfsdevice *ds, *fds; 3658 cap_rights_t rights; 3659 int buflen, error, ret; 3660 char *buf, *cp, *cp2, *cp3; 3661 char fname[PNFS_FILENAME_LEN + 1]; 3662 3663 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3664 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3665 if (error) 3666 goto out; 3667 /* 3668 * Since we don't know what rights might be required, 3669 * pretend that we need them all. It is better to be too 3670 * careful than too reckless. 3671 */ 3672 error = fget(td, sockarg.sock, 3673 cap_rights_init_one(&rights, CAP_SOCK_SERVER), &fp); 3674 if (error != 0) 3675 goto out; 3676 if (fp->f_type != DTYPE_SOCKET) { 3677 fdrop(fp, td); 3678 error = EPERM; 3679 goto out; 3680 } 3681 error = nfsrvd_addsock(fp); 3682 fdrop(fp, td); 3683 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3684 if (uap->argp == NULL) { 3685 error = EINVAL; 3686 goto out; 3687 } 3688 if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) { 3689 error = copyin(uap->argp, &onfsdarg, sizeof(onfsdarg)); 3690 if (error == 0) { 3691 nfsdarg.principal = onfsdarg.principal; 3692 nfsdarg.minthreads = onfsdarg.minthreads; 3693 nfsdarg.maxthreads = onfsdarg.maxthreads; 3694 nfsdarg.version = 1; 3695 nfsdarg.addr = NULL; 3696 nfsdarg.addrlen = 0; 3697 nfsdarg.dnshost = NULL; 3698 nfsdarg.dnshostlen = 0; 3699 nfsdarg.dspath = NULL; 3700 nfsdarg.dspathlen = 0; 3701 nfsdarg.mdspath = NULL; 3702 nfsdarg.mdspathlen = 0; 3703 nfsdarg.mirrorcnt = 1; 3704 } 3705 } else 3706 error = copyin(uap->argp, &nfsdarg, sizeof(nfsdarg)); 3707 if (error) 3708 goto out; 3709 if (nfsdarg.addrlen > 0 && nfsdarg.addrlen < 10000 && 3710 nfsdarg.dnshostlen > 0 && nfsdarg.dnshostlen < 10000 && 3711 nfsdarg.dspathlen > 0 && nfsdarg.dspathlen < 10000 && 3712 nfsdarg.mdspathlen > 0 && nfsdarg.mdspathlen < 10000 && 3713 nfsdarg.mirrorcnt >= 1 && 3714 nfsdarg.mirrorcnt <= NFSDEV_MAXMIRRORS && 3715 nfsdarg.addr != NULL && nfsdarg.dnshost != NULL && 3716 nfsdarg.dspath != NULL && nfsdarg.mdspath != NULL) { 3717 NFSD_DEBUG(1, "addrlen=%d dspathlen=%d dnslen=%d" 3718 " mdspathlen=%d mirrorcnt=%d\n", nfsdarg.addrlen, 3719 nfsdarg.dspathlen, nfsdarg.dnshostlen, 3720 nfsdarg.mdspathlen, nfsdarg.mirrorcnt); 3721 cp = malloc(nfsdarg.addrlen + 1, M_TEMP, M_WAITOK); 3722 error = copyin(nfsdarg.addr, cp, nfsdarg.addrlen); 3723 if (error != 0) { 3724 free(cp, M_TEMP); 3725 goto out; 3726 } 3727 cp[nfsdarg.addrlen] = '\0'; /* Ensure nul term. */ 3728 nfsdarg.addr = cp; 3729 cp = malloc(nfsdarg.dnshostlen + 1, M_TEMP, M_WAITOK); 3730 error = copyin(nfsdarg.dnshost, cp, nfsdarg.dnshostlen); 3731 if (error != 0) { 3732 free(nfsdarg.addr, M_TEMP); 3733 free(cp, M_TEMP); 3734 goto out; 3735 } 3736 cp[nfsdarg.dnshostlen] = '\0'; /* Ensure nul term. */ 3737 nfsdarg.dnshost = cp; 3738 cp = malloc(nfsdarg.dspathlen + 1, M_TEMP, M_WAITOK); 3739 error = copyin(nfsdarg.dspath, cp, nfsdarg.dspathlen); 3740 if (error != 0) { 3741 free(nfsdarg.addr, M_TEMP); 3742 free(nfsdarg.dnshost, M_TEMP); 3743 free(cp, M_TEMP); 3744 goto out; 3745 } 3746 cp[nfsdarg.dspathlen] = '\0'; /* Ensure nul term. */ 3747 nfsdarg.dspath = cp; 3748 cp = malloc(nfsdarg.mdspathlen + 1, M_TEMP, M_WAITOK); 3749 error = copyin(nfsdarg.mdspath, cp, nfsdarg.mdspathlen); 3750 if (error != 0) { 3751 free(nfsdarg.addr, M_TEMP); 3752 free(nfsdarg.dnshost, M_TEMP); 3753 free(nfsdarg.dspath, M_TEMP); 3754 free(cp, M_TEMP); 3755 goto out; 3756 } 3757 cp[nfsdarg.mdspathlen] = '\0'; /* Ensure nul term. */ 3758 nfsdarg.mdspath = cp; 3759 } else { 3760 nfsdarg.addr = NULL; 3761 nfsdarg.addrlen = 0; 3762 nfsdarg.dnshost = NULL; 3763 nfsdarg.dnshostlen = 0; 3764 nfsdarg.dspath = NULL; 3765 nfsdarg.dspathlen = 0; 3766 nfsdarg.mdspath = NULL; 3767 nfsdarg.mdspathlen = 0; 3768 nfsdarg.mirrorcnt = 1; 3769 } 3770 nfsd_timer(NULL); 3771 error = nfsrvd_nfsd(td, &nfsdarg); 3772 free(nfsdarg.addr, M_TEMP); 3773 free(nfsdarg.dnshost, M_TEMP); 3774 free(nfsdarg.dspath, M_TEMP); 3775 free(nfsdarg.mdspath, M_TEMP); 3776 } else if (uap->flag & NFSSVC_PNFSDS) { 3777 error = copyin(uap->argp, &pnfsdarg, sizeof(pnfsdarg)); 3778 if (error == 0 && (pnfsdarg.op == PNFSDOP_DELDSSERVER || 3779 pnfsdarg.op == PNFSDOP_FORCEDELDS)) { 3780 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3781 error = copyinstr(pnfsdarg.dspath, cp, PATH_MAX + 1, 3782 NULL); 3783 if (error == 0) 3784 error = nfsrv_deldsserver(pnfsdarg.op, cp, td); 3785 free(cp, M_TEMP); 3786 } else if (error == 0 && pnfsdarg.op == PNFSDOP_COPYMR) { 3787 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3788 buflen = sizeof(*pf) * NFSDEV_MAXMIRRORS; 3789 buf = malloc(buflen, M_TEMP, M_WAITOK); 3790 error = copyinstr(pnfsdarg.mdspath, cp, PATH_MAX + 1, 3791 NULL); 3792 NFSD_DEBUG(4, "pnfsdcopymr cp mdspath=%d\n", error); 3793 if (error == 0 && pnfsdarg.dspath != NULL) { 3794 cp2 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3795 error = copyinstr(pnfsdarg.dspath, cp2, 3796 PATH_MAX + 1, NULL); 3797 NFSD_DEBUG(4, "pnfsdcopymr cp dspath=%d\n", 3798 error); 3799 } else 3800 cp2 = NULL; 3801 if (error == 0 && pnfsdarg.curdspath != NULL) { 3802 cp3 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3803 error = copyinstr(pnfsdarg.curdspath, cp3, 3804 PATH_MAX + 1, NULL); 3805 NFSD_DEBUG(4, "pnfsdcopymr cp curdspath=%d\n", 3806 error); 3807 } else 3808 cp3 = NULL; 3809 curdvp = NULL; 3810 fds = NULL; 3811 if (error == 0) 3812 error = nfsrv_mdscopymr(cp, cp2, cp3, buf, 3813 &buflen, fname, td, &vp, &nvp, &pf, &ds, 3814 &fds); 3815 NFSD_DEBUG(4, "nfsrv_mdscopymr=%d\n", error); 3816 if (error == 0) { 3817 if (pf->dsf_dir >= nfsrv_dsdirsize) { 3818 printf("copymr: dsdir out of range\n"); 3819 pf->dsf_dir = 0; 3820 } 3821 NFSD_DEBUG(4, "copymr: buflen=%d\n", buflen); 3822 error = nfsrv_copymr(vp, nvp, 3823 ds->nfsdev_dsdir[pf->dsf_dir], ds, pf, 3824 (struct pnfsdsfile *)buf, 3825 buflen / sizeof(*pf), td->td_ucred, td); 3826 vput(vp); 3827 vput(nvp); 3828 if (fds != NULL && error == 0) { 3829 curdvp = fds->nfsdev_dsdir[pf->dsf_dir]; 3830 ret = vn_lock(curdvp, LK_EXCLUSIVE); 3831 if (ret == 0) { 3832 nfsrv_dsremove(curdvp, fname, 3833 td->td_ucred, td); 3834 NFSVOPUNLOCK(curdvp); 3835 } 3836 } 3837 NFSD_DEBUG(4, "nfsrv_copymr=%d\n", error); 3838 } 3839 free(cp, M_TEMP); 3840 free(cp2, M_TEMP); 3841 free(cp3, M_TEMP); 3842 free(buf, M_TEMP); 3843 } 3844 } else { 3845 error = nfssvc_srvcall(td, uap, td->td_ucred); 3846 } 3847 3848 out: 3849 NFSEXITCODE(error); 3850 return (error); 3851 } 3852 3853 static int 3854 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3855 { 3856 struct nfsex_args export; 3857 struct nfsex_oldargs oexp; 3858 struct file *fp = NULL; 3859 int stablefd, i, len; 3860 struct nfsd_clid adminrevoke; 3861 struct nfsd_dumplist dumplist; 3862 struct nfsd_dumpclients *dumpclients; 3863 struct nfsd_dumplocklist dumplocklist; 3864 struct nfsd_dumplocks *dumplocks; 3865 struct nameidata nd; 3866 vnode_t vp; 3867 int error = EINVAL, igotlock; 3868 struct proc *procp; 3869 gid_t *grps; 3870 static int suspend_nfsd = 0; 3871 3872 if (uap->flag & NFSSVC_PUBLICFH) { 3873 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3874 sizeof (fhandle_t)); 3875 error = copyin(uap->argp, 3876 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3877 if (!error) 3878 nfs_pubfhset = 1; 3879 } else if ((uap->flag & (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) == 3880 (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) { 3881 error = copyin(uap->argp,(caddr_t)&export, 3882 sizeof (struct nfsex_args)); 3883 if (!error) { 3884 grps = NULL; 3885 if (export.export.ex_ngroups > NGROUPS_MAX || 3886 export.export.ex_ngroups < 0) 3887 error = EINVAL; 3888 else if (export.export.ex_ngroups > 0) { 3889 grps = malloc(export.export.ex_ngroups * 3890 sizeof(gid_t), M_TEMP, M_WAITOK); 3891 error = copyin(export.export.ex_groups, grps, 3892 export.export.ex_ngroups * sizeof(gid_t)); 3893 export.export.ex_groups = grps; 3894 } else 3895 export.export.ex_groups = NULL; 3896 if (!error) 3897 error = nfsrv_v4rootexport(&export, cred, p); 3898 free(grps, M_TEMP); 3899 } 3900 } else if ((uap->flag & (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) == 3901 NFSSVC_V4ROOTEXPORT) { 3902 error = copyin(uap->argp,(caddr_t)&oexp, 3903 sizeof (struct nfsex_oldargs)); 3904 if (!error) { 3905 memset(&export.export, 0, sizeof(export.export)); 3906 export.export.ex_flags = (uint64_t)oexp.export.ex_flags; 3907 export.export.ex_root = oexp.export.ex_root; 3908 export.export.ex_uid = oexp.export.ex_anon.cr_uid; 3909 export.export.ex_ngroups = 3910 oexp.export.ex_anon.cr_ngroups; 3911 export.export.ex_groups = NULL; 3912 if (export.export.ex_ngroups > XU_NGROUPS || 3913 export.export.ex_ngroups < 0) 3914 error = EINVAL; 3915 else if (export.export.ex_ngroups > 0) { 3916 export.export.ex_groups = malloc( 3917 export.export.ex_ngroups * sizeof(gid_t), 3918 M_TEMP, M_WAITOK); 3919 for (i = 0; i < export.export.ex_ngroups; i++) 3920 export.export.ex_groups[i] = 3921 oexp.export.ex_anon.cr_groups[i]; 3922 } 3923 export.export.ex_addr = oexp.export.ex_addr; 3924 export.export.ex_addrlen = oexp.export.ex_addrlen; 3925 export.export.ex_mask = oexp.export.ex_mask; 3926 export.export.ex_masklen = oexp.export.ex_masklen; 3927 export.export.ex_indexfile = oexp.export.ex_indexfile; 3928 export.export.ex_numsecflavors = 3929 oexp.export.ex_numsecflavors; 3930 if (export.export.ex_numsecflavors >= MAXSECFLAVORS || 3931 export.export.ex_numsecflavors < 0) 3932 error = EINVAL; 3933 else { 3934 for (i = 0; i < export.export.ex_numsecflavors; 3935 i++) 3936 export.export.ex_secflavors[i] = 3937 oexp.export.ex_secflavors[i]; 3938 } 3939 export.fspec = oexp.fspec; 3940 if (error == 0) 3941 error = nfsrv_v4rootexport(&export, cred, p); 3942 free(export.export.ex_groups, M_TEMP); 3943 } 3944 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3945 nfs_pubfhset = 0; 3946 error = 0; 3947 } else if (uap->flag & NFSSVC_STABLERESTART) { 3948 error = copyin(uap->argp, (caddr_t)&stablefd, 3949 sizeof (int)); 3950 if (!error) 3951 error = fp_getfvp(p, stablefd, &fp, &vp); 3952 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3953 error = EBADF; 3954 if (!error && newnfs_numnfsd != 0) 3955 error = EPERM; 3956 if (!error) { 3957 nfsrv_stablefirst.nsf_fp = fp; 3958 nfsrv_setupstable(p); 3959 } 3960 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3961 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3962 sizeof (struct nfsd_clid)); 3963 if (!error) 3964 error = nfsrv_adminrevoke(&adminrevoke, p); 3965 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3966 error = copyin(uap->argp, (caddr_t)&dumplist, 3967 sizeof (struct nfsd_dumplist)); 3968 if (!error && (dumplist.ndl_size < 1 || 3969 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3970 error = EPERM; 3971 if (!error) { 3972 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3973 dumpclients = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3974 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3975 error = copyout(dumpclients, dumplist.ndl_list, len); 3976 free(dumpclients, M_TEMP); 3977 } 3978 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3979 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3980 sizeof (struct nfsd_dumplocklist)); 3981 if (!error && (dumplocklist.ndllck_size < 1 || 3982 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3983 error = EPERM; 3984 if (!error) 3985 error = nfsrv_lookupfilename(&nd, 3986 dumplocklist.ndllck_fname, p); 3987 if (!error) { 3988 len = sizeof (struct nfsd_dumplocks) * 3989 dumplocklist.ndllck_size; 3990 dumplocks = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3991 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3992 dumplocklist.ndllck_size, p); 3993 vput(nd.ni_vp); 3994 error = copyout(dumplocks, dumplocklist.ndllck_list, 3995 len); 3996 free(dumplocks, M_TEMP); 3997 } 3998 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3999 procp = p->td_proc; 4000 PROC_LOCK(procp); 4001 nfsd_master_pid = procp->p_pid; 4002 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 4003 nfsd_master_start = procp->p_stats->p_start; 4004 nfsd_master_proc = procp; 4005 PROC_UNLOCK(procp); 4006 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 4007 NFSLOCKV4ROOTMUTEX(); 4008 if (suspend_nfsd == 0) { 4009 /* Lock out all nfsd threads */ 4010 do { 4011 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 4012 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 4013 } while (igotlock == 0 && suspend_nfsd == 0); 4014 suspend_nfsd = 1; 4015 } 4016 NFSUNLOCKV4ROOTMUTEX(); 4017 error = 0; 4018 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 4019 NFSLOCKV4ROOTMUTEX(); 4020 if (suspend_nfsd != 0) { 4021 nfsv4_unlock(&nfsd_suspend_lock, 0); 4022 suspend_nfsd = 0; 4023 } 4024 NFSUNLOCKV4ROOTMUTEX(); 4025 error = 0; 4026 } 4027 4028 NFSEXITCODE(error); 4029 return (error); 4030 } 4031 4032 /* 4033 * Check exports. 4034 * Returns 0 if ok, 1 otherwise. 4035 */ 4036 int 4037 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 4038 { 4039 int i; 4040 4041 if ((NFSVNO_EXTLS(exp) && (nd->nd_flag & ND_TLS) == 0) || 4042 (NFSVNO_EXTLSCERT(exp) && 4043 (nd->nd_flag & ND_TLSCERT) == 0) || 4044 (NFSVNO_EXTLSCERTUSER(exp) && 4045 (nd->nd_flag & ND_TLSCERTUSER) == 0)) { 4046 if ((nd->nd_flag & ND_NFSV4) != 0) 4047 return (NFSERR_WRONGSEC); 4048 #ifdef notnow 4049 /* There is currently no auth_stat for this. */ 4050 else if ((nd->nd_flag & ND_TLS) == 0) 4051 return (NFSERR_AUTHERR | AUTH_NEEDS_TLS); 4052 else 4053 return (NFSERR_AUTHERR | AUTH_NEEDS_TLS_MUTUAL_HOST); 4054 #endif 4055 else 4056 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 4057 } 4058 4059 /* 4060 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to use 4061 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 4062 */ 4063 if ((nd->nd_flag & ND_NFSV3) != 0 && nd->nd_procnum == NFSPROC_FSINFO) 4064 return (0); 4065 4066 /* 4067 * This seems odd, but allow the case where the security flavor 4068 * list is empty. This happens when NFSv4 is traversing non-exported 4069 * file systems. Exported file systems should always have a non-empty 4070 * security flavor list. 4071 */ 4072 if (exp->nes_numsecflavor == 0) 4073 return (0); 4074 4075 for (i = 0; i < exp->nes_numsecflavor; i++) { 4076 /* 4077 * The tests for privacy and integrity must be first, 4078 * since ND_GSS is set for everything but AUTH_SYS. 4079 */ 4080 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 4081 (nd->nd_flag & ND_GSSPRIVACY)) 4082 return (0); 4083 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 4084 (nd->nd_flag & ND_GSSINTEGRITY)) 4085 return (0); 4086 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 4087 (nd->nd_flag & ND_GSS)) 4088 return (0); 4089 if (exp->nes_secflavors[i] == AUTH_SYS && 4090 (nd->nd_flag & ND_GSS) == 0) 4091 return (0); 4092 } 4093 if ((nd->nd_flag & ND_NFSV4) != 0) 4094 return (NFSERR_WRONGSEC); 4095 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 4096 } 4097 4098 /* 4099 * Calculate a hash value for the fid in a file handle. 4100 */ 4101 uint32_t 4102 nfsrv_hashfh(fhandle_t *fhp) 4103 { 4104 uint32_t hashval; 4105 4106 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 4107 return (hashval); 4108 } 4109 4110 /* 4111 * Calculate a hash value for the sessionid. 4112 */ 4113 uint32_t 4114 nfsrv_hashsessionid(uint8_t *sessionid) 4115 { 4116 uint32_t hashval; 4117 4118 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 4119 return (hashval); 4120 } 4121 4122 /* 4123 * Signal the userland master nfsd to backup the stable restart file. 4124 */ 4125 void 4126 nfsrv_backupstable(void) 4127 { 4128 struct proc *procp; 4129 4130 if (nfsd_master_proc != NULL) { 4131 procp = pfind(nfsd_master_pid); 4132 /* Try to make sure it is the correct process. */ 4133 if (procp == nfsd_master_proc && 4134 procp->p_stats->p_start.tv_sec == 4135 nfsd_master_start.tv_sec && 4136 procp->p_stats->p_start.tv_usec == 4137 nfsd_master_start.tv_usec && 4138 strcmp(procp->p_comm, nfsd_master_comm) == 0) 4139 kern_psignal(procp, SIGUSR2); 4140 else 4141 nfsd_master_proc = NULL; 4142 4143 if (procp != NULL) 4144 PROC_UNLOCK(procp); 4145 } 4146 } 4147 4148 /* 4149 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 4150 * The arguments are in a structure, so that they can be passed through 4151 * taskqueue for a kernel process to execute this function. 4152 */ 4153 struct nfsrvdscreate { 4154 int done; 4155 int inprog; 4156 struct task tsk; 4157 struct ucred *tcred; 4158 struct vnode *dvp; 4159 NFSPROC_T *p; 4160 struct pnfsdsfile *pf; 4161 int err; 4162 fhandle_t fh; 4163 struct vattr va; 4164 struct vattr createva; 4165 }; 4166 4167 int 4168 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 4169 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 4170 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 4171 { 4172 struct vnode *nvp; 4173 struct nameidata named; 4174 struct vattr va; 4175 char *bufp; 4176 u_long *hashp; 4177 struct nfsnode *np; 4178 struct nfsmount *nmp; 4179 int error; 4180 4181 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 4182 LOCKPARENT | LOCKLEAF | NOCACHE); 4183 nfsvno_setpathbuf(&named, &bufp, &hashp); 4184 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 4185 named.ni_cnd.cn_nameptr = bufp; 4186 if (fnamep != NULL) { 4187 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 4188 named.ni_cnd.cn_namelen = strlen(bufp); 4189 } else 4190 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 4191 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 4192 4193 /* Create the date file in the DS mount. */ 4194 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4195 if (error == 0) { 4196 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 4197 vref(dvp); 4198 VOP_VPUT_PAIR(dvp, error == 0 ? &nvp : NULL, false); 4199 if (error == 0) { 4200 /* Set the ownership of the file. */ 4201 error = VOP_SETATTR(nvp, nvap, tcred); 4202 NFSD_DEBUG(4, "nfsrv_dscreate:" 4203 " setattr-uid=%d\n", error); 4204 if (error != 0) 4205 vput(nvp); 4206 } 4207 if (error != 0) 4208 printf("pNFS: pnfscreate failed=%d\n", error); 4209 } else 4210 printf("pNFS: pnfscreate vnlock=%d\n", error); 4211 if (error == 0) { 4212 np = VTONFS(nvp); 4213 nmp = VFSTONFS(nvp->v_mount); 4214 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 4215 != 0 || nmp->nm_nam->sa_len > sizeof( 4216 struct sockaddr_in6) || 4217 np->n_fhp->nfh_len != NFSX_MYFH) { 4218 printf("Bad DS file: fstype=%s salen=%d" 4219 " fhlen=%d\n", 4220 nvp->v_mount->mnt_vfc->vfc_name, 4221 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 4222 error = ENOENT; 4223 } 4224 4225 /* Set extattrs for the DS on the MDS file. */ 4226 if (error == 0) { 4227 if (dsa != NULL) { 4228 error = VOP_GETATTR(nvp, &va, tcred); 4229 if (error == 0) { 4230 dsa->dsa_filerev = va.va_filerev; 4231 dsa->dsa_size = va.va_size; 4232 dsa->dsa_atime = va.va_atime; 4233 dsa->dsa_mtime = va.va_mtime; 4234 dsa->dsa_bytes = va.va_bytes; 4235 } 4236 } 4237 if (error == 0) { 4238 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 4239 NFSX_MYFH); 4240 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 4241 nmp->nm_nam->sa_len); 4242 NFSBCOPY(named.ni_cnd.cn_nameptr, 4243 pf->dsf_filename, 4244 sizeof(pf->dsf_filename)); 4245 } 4246 } else 4247 printf("pNFS: pnfscreate can't get DS" 4248 " attr=%d\n", error); 4249 if (nvpp != NULL && error == 0) 4250 *nvpp = nvp; 4251 else 4252 vput(nvp); 4253 } 4254 nfsvno_relpathbuf(&named); 4255 return (error); 4256 } 4257 4258 /* 4259 * Start up the thread that will execute nfsrv_dscreate(). 4260 */ 4261 static void 4262 start_dscreate(void *arg, int pending) 4263 { 4264 struct nfsrvdscreate *dsc; 4265 4266 dsc = (struct nfsrvdscreate *)arg; 4267 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 4268 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 4269 dsc->done = 1; 4270 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 4271 } 4272 4273 /* 4274 * Create a pNFS data file on the Data Server(s). 4275 */ 4276 static void 4277 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 4278 NFSPROC_T *p) 4279 { 4280 struct nfsrvdscreate *dsc, *tdsc = NULL; 4281 struct nfsdevice *ds, *tds, *fds; 4282 struct mount *mp; 4283 struct pnfsdsfile *pf, *tpf; 4284 struct pnfsdsattr dsattr; 4285 struct vattr va; 4286 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4287 struct nfsmount *nmp; 4288 fhandle_t fh; 4289 uid_t vauid; 4290 gid_t vagid; 4291 u_short vamode; 4292 struct ucred *tcred; 4293 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 4294 int failpos, timo; 4295 4296 /* Get a DS server directory in a round-robin order. */ 4297 mirrorcnt = 1; 4298 mp = vp->v_mount; 4299 ds = fds = NULL; 4300 NFSDDSLOCK(); 4301 /* 4302 * Search for the first entry that handles this MDS fs, but use the 4303 * first entry for all MDS fs's otherwise. 4304 */ 4305 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 4306 if (tds->nfsdev_nmp != NULL) { 4307 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 4308 ds = tds; 4309 else if (tds->nfsdev_mdsisset != 0 && fsidcmp( 4310 &mp->mnt_stat.f_fsid, &tds->nfsdev_mdsfsid) == 0) { 4311 ds = fds = tds; 4312 break; 4313 } 4314 } 4315 } 4316 if (ds == NULL) { 4317 NFSDDSUNLOCK(); 4318 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 4319 return; 4320 } 4321 i = dsdir[0] = ds->nfsdev_nextdir; 4322 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 4323 dvp[0] = ds->nfsdev_dsdir[i]; 4324 tds = TAILQ_NEXT(ds, nfsdev_list); 4325 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 4326 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 4327 if (tds->nfsdev_nmp != NULL && 4328 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 4329 (tds->nfsdev_mdsisset != 0 && fds != NULL && 4330 fsidcmp(&mp->mnt_stat.f_fsid, 4331 &tds->nfsdev_mdsfsid) == 0))) { 4332 dsdir[mirrorcnt] = i; 4333 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 4334 mirrorcnt++; 4335 if (mirrorcnt >= nfsrv_maxpnfsmirror) 4336 break; 4337 } 4338 } 4339 } 4340 /* Put at end of list to implement round-robin usage. */ 4341 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 4342 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 4343 NFSDDSUNLOCK(); 4344 dsc = NULL; 4345 if (mirrorcnt > 1) 4346 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 4347 M_WAITOK | M_ZERO); 4348 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 4349 M_ZERO); 4350 4351 error = nfsvno_getfh(vp, &fh, p); 4352 if (error == 0) 4353 error = VOP_GETATTR(vp, &va, cred); 4354 if (error == 0) { 4355 /* Set the attributes for "vp" to Setattr the DS vp. */ 4356 vauid = va.va_uid; 4357 vagid = va.va_gid; 4358 vamode = va.va_mode; 4359 VATTR_NULL(&va); 4360 va.va_uid = vauid; 4361 va.va_gid = vagid; 4362 va.va_mode = vamode; 4363 va.va_size = 0; 4364 } else 4365 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 4366 4367 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 4368 cred->cr_gid); 4369 /* Make data file name based on FH. */ 4370 tcred = newnfs_getcred(); 4371 4372 /* 4373 * Create the file on each DS mirror, using kernel process(es) for the 4374 * additional mirrors. 4375 */ 4376 failpos = -1; 4377 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 4378 tpf->dsf_dir = dsdir[i]; 4379 tdsc->tcred = tcred; 4380 tdsc->p = p; 4381 tdsc->pf = tpf; 4382 tdsc->createva = *vap; 4383 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 4384 tdsc->va = va; 4385 tdsc->dvp = dvp[i]; 4386 tdsc->done = 0; 4387 tdsc->inprog = 0; 4388 tdsc->err = 0; 4389 ret = EIO; 4390 if (nfs_pnfsiothreads != 0) { 4391 ret = nfs_pnfsio(start_dscreate, tdsc); 4392 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 4393 } 4394 if (ret != 0) { 4395 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 4396 NULL, tcred, p, NULL); 4397 if (ret != 0) { 4398 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 4399 error)); 4400 if (failpos == -1 && nfsds_failerr(ret)) 4401 failpos = i; 4402 else 4403 error = ret; 4404 } 4405 } 4406 } 4407 if (error == 0) { 4408 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4409 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4410 &dsattr, NULL, tcred, p, NULL); 4411 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4412 failpos = mirrorcnt - 1; 4413 error = 0; 4414 } 4415 } 4416 timo = hz / 50; /* Wait for 20msec. */ 4417 if (timo < 1) 4418 timo = 1; 4419 /* Wait for kernel task(s) to complete. */ 4420 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4421 while (tdsc->inprog != 0 && tdsc->done == 0) 4422 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4423 if (tdsc->err != 0) { 4424 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4425 failpos = i; 4426 else if (error == 0) 4427 error = tdsc->err; 4428 } 4429 } 4430 4431 /* 4432 * If failpos has been set, that mirror has failed, so it needs 4433 * to be disabled. 4434 */ 4435 if (failpos >= 0) { 4436 nmp = VFSTONFS(dvp[failpos]->v_mount); 4437 NFSLOCKMNT(nmp); 4438 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4439 NFSMNTP_CANCELRPCS)) == 0) { 4440 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4441 NFSUNLOCKMNT(nmp); 4442 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4443 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4444 ds); 4445 if (ds != NULL) 4446 nfsrv_killrpcs(nmp); 4447 NFSLOCKMNT(nmp); 4448 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4449 wakeup(nmp); 4450 } 4451 NFSUNLOCKMNT(nmp); 4452 } 4453 4454 NFSFREECRED(tcred); 4455 if (error == 0) { 4456 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4457 4458 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4459 mirrorcnt, nfsrv_maxpnfsmirror); 4460 /* 4461 * For all mirrors that couldn't be created, fill in the 4462 * *pf structure, but with an IP address == 0.0.0.0. 4463 */ 4464 tpf = pf + mirrorcnt; 4465 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4466 *tpf = *pf; 4467 tpf->dsf_sin.sin_family = AF_INET; 4468 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4469 tpf->dsf_sin.sin_addr.s_addr = 0; 4470 tpf->dsf_sin.sin_port = 0; 4471 } 4472 4473 error = vn_extattr_set(vp, IO_NODELOCKED, 4474 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4475 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4476 if (error == 0) 4477 error = vn_extattr_set(vp, IO_NODELOCKED, 4478 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4479 sizeof(dsattr), (char *)&dsattr, p); 4480 if (error != 0) 4481 printf("pNFS: pnfscreate setextattr=%d\n", 4482 error); 4483 } else 4484 printf("pNFS: pnfscreate=%d\n", error); 4485 free(pf, M_TEMP); 4486 free(dsc, M_TEMP); 4487 } 4488 4489 /* 4490 * Get the information needed to remove the pNFS Data Server file from the 4491 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4492 * DS directory vnode. The caller must unlock *ddvp when done with it. 4493 */ 4494 static void 4495 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4496 int *mirrorcntp, char *fname, fhandle_t *fhp) 4497 { 4498 struct vattr va; 4499 struct ucred *tcred; 4500 char *buf; 4501 int buflen, error; 4502 4503 dvpp[0] = NULL; 4504 /* If not an exported regular file or not a pNFS server, just return. */ 4505 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4506 nfsrv_devidcnt == 0) 4507 return; 4508 4509 /* Check to see if this is the last hard link. */ 4510 tcred = newnfs_getcred(); 4511 error = VOP_GETATTR(vp, &va, tcred); 4512 NFSFREECRED(tcred); 4513 if (error != 0) { 4514 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4515 return; 4516 } 4517 if (va.va_nlink > 1) 4518 return; 4519 4520 error = nfsvno_getfh(vp, fhp, p); 4521 if (error != 0) { 4522 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4523 return; 4524 } 4525 4526 buflen = 1024; 4527 buf = malloc(buflen, M_TEMP, M_WAITOK); 4528 /* Get the directory vnode for the DS mount and the file handle. */ 4529 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4530 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4531 free(buf, M_TEMP); 4532 if (error != 0) 4533 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4534 } 4535 4536 /* 4537 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4538 * The arguments are in a structure, so that they can be passed through 4539 * taskqueue for a kernel process to execute this function. 4540 */ 4541 struct nfsrvdsremove { 4542 int done; 4543 int inprog; 4544 struct task tsk; 4545 struct ucred *tcred; 4546 struct vnode *dvp; 4547 NFSPROC_T *p; 4548 int err; 4549 char fname[PNFS_FILENAME_LEN + 1]; 4550 }; 4551 4552 static int 4553 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4554 NFSPROC_T *p) 4555 { 4556 struct nameidata named; 4557 struct vnode *nvp; 4558 char *bufp; 4559 u_long *hashp; 4560 int error; 4561 4562 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4563 if (error != 0) 4564 return (error); 4565 named.ni_cnd.cn_nameiop = DELETE; 4566 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4567 named.ni_cnd.cn_cred = tcred; 4568 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF; 4569 nfsvno_setpathbuf(&named, &bufp, &hashp); 4570 named.ni_cnd.cn_nameptr = bufp; 4571 named.ni_cnd.cn_namelen = strlen(fname); 4572 strlcpy(bufp, fname, NAME_MAX); 4573 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4574 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4575 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4576 if (error == 0) { 4577 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4578 vput(nvp); 4579 } 4580 NFSVOPUNLOCK(dvp); 4581 nfsvno_relpathbuf(&named); 4582 if (error != 0) 4583 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4584 return (error); 4585 } 4586 4587 /* 4588 * Start up the thread that will execute nfsrv_dsremove(). 4589 */ 4590 static void 4591 start_dsremove(void *arg, int pending) 4592 { 4593 struct nfsrvdsremove *dsrm; 4594 4595 dsrm = (struct nfsrvdsremove *)arg; 4596 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4597 dsrm->p); 4598 dsrm->done = 1; 4599 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4600 } 4601 4602 /* 4603 * Remove a pNFS data file from a Data Server. 4604 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4605 * removed to set up the dvp and fill in the FH. 4606 */ 4607 static void 4608 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4609 NFSPROC_T *p) 4610 { 4611 struct ucred *tcred; 4612 struct nfsrvdsremove *dsrm, *tdsrm; 4613 struct nfsdevice *ds; 4614 struct nfsmount *nmp; 4615 int failpos, i, ret, timo; 4616 4617 tcred = newnfs_getcred(); 4618 dsrm = NULL; 4619 if (mirrorcnt > 1) 4620 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4621 /* 4622 * Remove the file on each DS mirror, using kernel process(es) for the 4623 * additional mirrors. 4624 */ 4625 failpos = -1; 4626 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4627 tdsrm->tcred = tcred; 4628 tdsrm->p = p; 4629 tdsrm->dvp = dvp[i]; 4630 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4631 tdsrm->inprog = 0; 4632 tdsrm->done = 0; 4633 tdsrm->err = 0; 4634 ret = EIO; 4635 if (nfs_pnfsiothreads != 0) { 4636 ret = nfs_pnfsio(start_dsremove, tdsrm); 4637 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4638 } 4639 if (ret != 0) { 4640 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4641 if (failpos == -1 && nfsds_failerr(ret)) 4642 failpos = i; 4643 } 4644 } 4645 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4646 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4647 failpos = mirrorcnt - 1; 4648 timo = hz / 50; /* Wait for 20msec. */ 4649 if (timo < 1) 4650 timo = 1; 4651 /* Wait for kernel task(s) to complete. */ 4652 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4653 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4654 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4655 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4656 failpos = i; 4657 } 4658 4659 /* 4660 * If failpos has been set, that mirror has failed, so it needs 4661 * to be disabled. 4662 */ 4663 if (failpos >= 0) { 4664 nmp = VFSTONFS(dvp[failpos]->v_mount); 4665 NFSLOCKMNT(nmp); 4666 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4667 NFSMNTP_CANCELRPCS)) == 0) { 4668 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4669 NFSUNLOCKMNT(nmp); 4670 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4671 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4672 ds); 4673 if (ds != NULL) 4674 nfsrv_killrpcs(nmp); 4675 NFSLOCKMNT(nmp); 4676 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4677 wakeup(nmp); 4678 } 4679 NFSUNLOCKMNT(nmp); 4680 } 4681 4682 /* Get rid all layouts for the file. */ 4683 nfsrv_freefilelayouts(fhp); 4684 4685 NFSFREECRED(tcred); 4686 free(dsrm, M_TEMP); 4687 } 4688 4689 /* 4690 * Generate a file name based on the file handle and put it in *bufp. 4691 * Return the number of bytes generated. 4692 */ 4693 static int 4694 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4695 { 4696 int i; 4697 uint8_t *cp; 4698 const uint8_t *hexdigits = "0123456789abcdef"; 4699 4700 cp = (uint8_t *)fhp; 4701 for (i = 0; i < sizeof(*fhp); i++) { 4702 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4703 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4704 } 4705 bufp[2 * i] = '\0'; 4706 return (2 * i); 4707 } 4708 4709 /* 4710 * Update the Metadata file's attributes from the DS file when a Read/Write 4711 * layout is returned. 4712 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4713 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4714 */ 4715 int 4716 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4717 { 4718 struct ucred *tcred; 4719 int error; 4720 4721 /* Do this as root so that it won't fail with EACCES. */ 4722 tcred = newnfs_getcred(); 4723 error = nfsrv_proxyds(vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4724 NULL, NULL, NULL, nap, NULL, NULL, 0, NULL); 4725 NFSFREECRED(tcred); 4726 return (error); 4727 } 4728 4729 /* 4730 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4731 */ 4732 static int 4733 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4734 NFSPROC_T *p) 4735 { 4736 int error; 4737 4738 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETACL, 4739 NULL, NULL, NULL, NULL, aclp, NULL, 0, NULL); 4740 return (error); 4741 } 4742 4743 static int 4744 nfsrv_proxyds(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 4745 struct thread *p, int ioproc, struct mbuf **mpp, char *cp, 4746 struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp, 4747 off_t *offp, int content, bool *eofp) 4748 { 4749 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4750 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4751 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4752 struct nfsdevice *ds; 4753 struct pnfsdsattr dsattr; 4754 struct opnfsdsattr odsattr; 4755 char *buf; 4756 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4757 4758 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4759 /* 4760 * If not a regular file, not exported or not a pNFS server, 4761 * just return ENOENT. 4762 */ 4763 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4764 nfsrv_devidcnt == 0) 4765 return (ENOENT); 4766 4767 buflen = 1024; 4768 buf = malloc(buflen, M_TEMP, M_WAITOK); 4769 error = 0; 4770 4771 /* 4772 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4773 * from the MetaData file's extended attribute. 4774 */ 4775 if (ioproc == NFSPROC_GETATTR) { 4776 error = vn_extattr_get(vp, IO_NODELOCKED, 4777 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4778 p); 4779 if (error == 0) { 4780 if (buflen == sizeof(odsattr)) { 4781 NFSBCOPY(buf, &odsattr, buflen); 4782 nap->na_filerev = odsattr.dsa_filerev; 4783 nap->na_size = odsattr.dsa_size; 4784 nap->na_atime = odsattr.dsa_atime; 4785 nap->na_mtime = odsattr.dsa_mtime; 4786 /* 4787 * Fake na_bytes by rounding up na_size. 4788 * Since we don't know the block size, just 4789 * use BLKDEV_IOSIZE. 4790 */ 4791 nap->na_bytes = (odsattr.dsa_size + 4792 BLKDEV_IOSIZE - 1) & ~(BLKDEV_IOSIZE - 1); 4793 } else if (buflen == sizeof(dsattr)) { 4794 NFSBCOPY(buf, &dsattr, buflen); 4795 nap->na_filerev = dsattr.dsa_filerev; 4796 nap->na_size = dsattr.dsa_size; 4797 nap->na_atime = dsattr.dsa_atime; 4798 nap->na_mtime = dsattr.dsa_mtime; 4799 nap->na_bytes = dsattr.dsa_bytes; 4800 } else 4801 error = ENXIO; 4802 } 4803 if (error == 0) { 4804 /* 4805 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4806 * returns 0, just return now. nfsrv_checkdsattr() 4807 * returns 0 if there is no Read/Write layout 4808 * plus either an Open/Write_access or Write 4809 * delegation issued to a client for the file. 4810 */ 4811 if (nfsrv_pnfsgetdsattr == 0 || 4812 nfsrv_checkdsattr(vp, p) == 0) { 4813 free(buf, M_TEMP); 4814 return (error); 4815 } 4816 } 4817 4818 /* 4819 * Clear ENOATTR so the code below will attempt to do a 4820 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4821 * the extended attribute. 4822 */ 4823 if (error == ENOATTR) 4824 error = 0; 4825 } 4826 4827 origmircnt = -1; 4828 trycnt = 0; 4829 tryagain: 4830 if (error == 0) { 4831 buflen = 1024; 4832 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4833 LK_EXCLUSIVE) 4834 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4835 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4836 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4837 NULL, NULL); 4838 if (error == 0) { 4839 for (i = 0; i < mirrorcnt; i++) 4840 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4841 } else 4842 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4843 } else 4844 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4845 if (error == 0) { 4846 failpos = -1; 4847 if (origmircnt == -1) 4848 origmircnt = mirrorcnt; 4849 /* 4850 * If failpos is set to a mirror#, then that mirror has 4851 * failed and will be disabled. For Read, Getattr and Seek, the 4852 * function only tries one mirror, so if that mirror has 4853 * failed, it will need to be retried. As such, increment 4854 * tryitagain for these cases. 4855 * For Write, Setattr and Setacl, the function tries all 4856 * mirrors and will not return an error for the case where 4857 * one mirror has failed. For these cases, the functioning 4858 * mirror(s) will have been modified, so a retry isn't 4859 * necessary. These functions will set failpos for the 4860 * failed mirror#. 4861 */ 4862 if (ioproc == NFSPROC_READDS) { 4863 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4864 mpp, mpp2); 4865 if (nfsds_failerr(error) && mirrorcnt > 1) { 4866 /* 4867 * Setting failpos will cause the mirror 4868 * to be disabled and then a retry of this 4869 * read is required. 4870 */ 4871 failpos = 0; 4872 error = 0; 4873 trycnt++; 4874 } 4875 } else if (ioproc == NFSPROC_WRITEDS) 4876 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4877 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4878 else if (ioproc == NFSPROC_SETATTR) 4879 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4880 mirrorcnt, nap, &failpos); 4881 else if (ioproc == NFSPROC_SETACL) 4882 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4883 mirrorcnt, aclp, &failpos); 4884 else if (ioproc == NFSPROC_SEEKDS) { 4885 error = nfsrv_seekdsrpc(fh, offp, content, eofp, cred, 4886 p, nmp[0]); 4887 if (nfsds_failerr(error) && mirrorcnt > 1) { 4888 /* 4889 * Setting failpos will cause the mirror 4890 * to be disabled and then a retry of this 4891 * read is required. 4892 */ 4893 failpos = 0; 4894 error = 0; 4895 trycnt++; 4896 } 4897 } else if (ioproc == NFSPROC_ALLOCATE) 4898 error = nfsrv_allocatedsrpc(fh, off, *offp, cred, p, vp, 4899 &nmp[0], mirrorcnt, &failpos); 4900 else if (ioproc == NFSPROC_DEALLOCATE) 4901 error = nfsrv_deallocatedsrpc(fh, off, *offp, cred, p, 4902 vp, &nmp[0], mirrorcnt, &failpos); 4903 else { 4904 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4905 vp, nmp[mirrorcnt - 1], nap); 4906 if (nfsds_failerr(error) && mirrorcnt > 1) { 4907 /* 4908 * Setting failpos will cause the mirror 4909 * to be disabled and then a retry of this 4910 * getattr is required. 4911 */ 4912 failpos = mirrorcnt - 1; 4913 error = 0; 4914 trycnt++; 4915 } 4916 } 4917 ds = NULL; 4918 if (failpos >= 0) { 4919 failnmp = nmp[failpos]; 4920 NFSLOCKMNT(failnmp); 4921 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4922 NFSMNTP_CANCELRPCS)) == 0) { 4923 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4924 NFSUNLOCKMNT(failnmp); 4925 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4926 failnmp, p); 4927 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4928 failpos, ds); 4929 if (ds != NULL) 4930 nfsrv_killrpcs(failnmp); 4931 NFSLOCKMNT(failnmp); 4932 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4933 wakeup(failnmp); 4934 } 4935 NFSUNLOCKMNT(failnmp); 4936 } 4937 for (i = 0; i < mirrorcnt; i++) 4938 NFSVOPUNLOCK(dvp[i]); 4939 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4940 trycnt); 4941 /* Try the Read/Getattr again if a mirror was deleted. */ 4942 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4943 goto tryagain; 4944 } else { 4945 /* Return ENOENT for any Extended Attribute error. */ 4946 error = ENOENT; 4947 } 4948 free(buf, M_TEMP); 4949 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4950 return (error); 4951 } 4952 4953 /* 4954 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4955 * attribute. 4956 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4957 * to be checked. If it points to a NULL nmp, then it returns 4958 * a suitable destination. 4959 * curnmp - If non-NULL, it is the source mount for the copy. 4960 */ 4961 int 4962 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4963 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4964 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4965 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4966 { 4967 struct vnode *dvp, *nvp = NULL, **tdvpp; 4968 struct mount *mp; 4969 struct nfsmount *nmp, *newnmp; 4970 struct sockaddr *sad; 4971 struct sockaddr_in *sin; 4972 struct nfsdevice *ds, *tds, *fndds; 4973 struct pnfsdsfile *pf; 4974 uint32_t dsdir; 4975 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4976 4977 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4978 *mirrorcntp = 1; 4979 tdvpp = dvpp; 4980 if (nvpp != NULL) 4981 *nvpp = NULL; 4982 if (dvpp != NULL) 4983 *dvpp = NULL; 4984 if (ippos != NULL) 4985 *ippos = -1; 4986 if (newnmpp != NULL) 4987 newnmp = *newnmpp; 4988 else 4989 newnmp = NULL; 4990 mp = vp->v_mount; 4991 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4992 "pnfsd.dsfile", buflenp, buf, p); 4993 mirrorcnt = *buflenp / sizeof(*pf); 4994 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4995 *buflenp != sizeof(*pf) * mirrorcnt)) 4996 error = ENOATTR; 4997 4998 pf = (struct pnfsdsfile *)buf; 4999 /* If curnmp != NULL, check for a match in the mirror list. */ 5000 if (curnmp != NULL && error == 0) { 5001 fnd = 0; 5002 for (i = 0; i < mirrorcnt; i++, pf++) { 5003 sad = (struct sockaddr *)&pf->dsf_sin; 5004 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 5005 if (ippos != NULL) 5006 *ippos = i; 5007 fnd = 1; 5008 break; 5009 } 5010 } 5011 if (fnd == 0) 5012 error = ENXIO; 5013 } 5014 5015 gotone = 0; 5016 pf = (struct pnfsdsfile *)buf; 5017 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 5018 error); 5019 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 5020 fhiszero = 0; 5021 sad = (struct sockaddr *)&pf->dsf_sin; 5022 sin = &pf->dsf_sin; 5023 dsdir = pf->dsf_dir; 5024 if (dsdir >= nfsrv_dsdirsize) { 5025 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 5026 error = ENOATTR; 5027 } else if (nvpp != NULL && newnmp != NULL && 5028 nfsaddr2_match(sad, newnmp->nm_nam)) 5029 error = EEXIST; 5030 if (error == 0) { 5031 if (ippos != NULL && curnmp == NULL && 5032 sad->sa_family == AF_INET && 5033 sin->sin_addr.s_addr == 0) 5034 *ippos = i; 5035 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 5036 fhiszero = 1; 5037 /* Use the socket address to find the mount point. */ 5038 fndds = NULL; 5039 NFSDDSLOCK(); 5040 /* Find a match for the IP address. */ 5041 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5042 if (ds->nfsdev_nmp != NULL) { 5043 dvp = ds->nfsdev_dvp; 5044 nmp = VFSTONFS(dvp->v_mount); 5045 if (nmp != ds->nfsdev_nmp) 5046 printf("different2 nmp %p %p\n", 5047 nmp, ds->nfsdev_nmp); 5048 if (nfsaddr2_match(sad, nmp->nm_nam)) { 5049 fndds = ds; 5050 break; 5051 } 5052 } 5053 } 5054 if (fndds != NULL && newnmpp != NULL && 5055 newnmp == NULL) { 5056 /* Search for a place to make a mirror copy. */ 5057 TAILQ_FOREACH(tds, &nfsrv_devidhead, 5058 nfsdev_list) { 5059 if (tds->nfsdev_nmp != NULL && 5060 fndds != tds && 5061 ((tds->nfsdev_mdsisset == 0 && 5062 fndds->nfsdev_mdsisset == 0) || 5063 (tds->nfsdev_mdsisset != 0 && 5064 fndds->nfsdev_mdsisset != 0 && 5065 fsidcmp(&tds->nfsdev_mdsfsid, 5066 &mp->mnt_stat.f_fsid) == 0))) { 5067 *newnmpp = tds->nfsdev_nmp; 5068 break; 5069 } 5070 } 5071 if (tds != NULL) { 5072 /* 5073 * Move this entry to the end of the 5074 * list, so it won't be selected as 5075 * easily the next time. 5076 */ 5077 TAILQ_REMOVE(&nfsrv_devidhead, tds, 5078 nfsdev_list); 5079 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 5080 nfsdev_list); 5081 } 5082 } 5083 NFSDDSUNLOCK(); 5084 if (fndds != NULL) { 5085 dvp = fndds->nfsdev_dsdir[dsdir]; 5086 if (lktype != 0 || fhiszero != 0 || 5087 (nvpp != NULL && *nvpp == NULL)) { 5088 if (fhiszero != 0) 5089 error = vn_lock(dvp, 5090 LK_EXCLUSIVE); 5091 else if (lktype != 0) 5092 error = vn_lock(dvp, lktype); 5093 else 5094 error = vn_lock(dvp, LK_SHARED); 5095 /* 5096 * If the file handle is all 0's, try to 5097 * do a Lookup against the DS to acquire 5098 * it. 5099 * If dvpp == NULL or the Lookup fails, 5100 * unlock dvp after the call. 5101 */ 5102 if (error == 0 && (fhiszero != 0 || 5103 (nvpp != NULL && *nvpp == NULL))) { 5104 error = nfsrv_pnfslookupds(vp, 5105 dvp, pf, &nvp, p); 5106 if (error == 0) { 5107 if (fhiszero != 0) 5108 nfsrv_pnfssetfh( 5109 vp, pf, 5110 devid, 5111 fnamep, 5112 nvp, p); 5113 if (nvpp != NULL && 5114 *nvpp == NULL) { 5115 *nvpp = nvp; 5116 *dsdirp = dsdir; 5117 } else 5118 vput(nvp); 5119 } 5120 if (error != 0 || lktype == 0) 5121 NFSVOPUNLOCK(dvp); 5122 } 5123 } 5124 if (error == 0) { 5125 gotone++; 5126 NFSD_DEBUG(4, "gotone=%d\n", gotone); 5127 if (devid != NULL) { 5128 NFSBCOPY(fndds->nfsdev_deviceid, 5129 devid, NFSX_V4DEVICEID); 5130 devid += NFSX_V4DEVICEID; 5131 } 5132 if (dvpp != NULL) 5133 *tdvpp++ = dvp; 5134 if (fhp != NULL) 5135 NFSBCOPY(&pf->dsf_fh, fhp++, 5136 NFSX_MYFH); 5137 if (fnamep != NULL && gotone == 1) 5138 strlcpy(fnamep, 5139 pf->dsf_filename, 5140 sizeof(pf->dsf_filename)); 5141 } else 5142 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 5143 "err=%d\n", error); 5144 } 5145 } 5146 } 5147 if (error == 0 && gotone == 0) 5148 error = ENOENT; 5149 5150 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 5151 error); 5152 if (error == 0) 5153 *mirrorcntp = gotone; 5154 else { 5155 if (gotone > 0 && dvpp != NULL) { 5156 /* 5157 * If the error didn't occur on the first one and 5158 * dvpp != NULL, the one(s) prior to the failure will 5159 * have locked dvp's that need to be unlocked. 5160 */ 5161 for (i = 0; i < gotone; i++) { 5162 NFSVOPUNLOCK(*dvpp); 5163 *dvpp++ = NULL; 5164 } 5165 } 5166 /* 5167 * If it found the vnode to be copied from before a failure, 5168 * it needs to be vput()'d. 5169 */ 5170 if (nvpp != NULL && *nvpp != NULL) { 5171 vput(*nvpp); 5172 *nvpp = NULL; 5173 } 5174 } 5175 return (error); 5176 } 5177 5178 /* 5179 * Set the extended attribute for the Change attribute. 5180 */ 5181 static int 5182 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 5183 { 5184 struct pnfsdsattr dsattr; 5185 int error; 5186 5187 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 5188 dsattr.dsa_filerev = nap->na_filerev; 5189 dsattr.dsa_size = nap->na_size; 5190 dsattr.dsa_atime = nap->na_atime; 5191 dsattr.dsa_mtime = nap->na_mtime; 5192 dsattr.dsa_bytes = nap->na_bytes; 5193 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 5194 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 5195 if (error != 0) 5196 printf("pNFS: setextattr=%d\n", error); 5197 return (error); 5198 } 5199 5200 static int 5201 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5202 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 5203 { 5204 uint32_t *tl; 5205 struct nfsrv_descript *nd; 5206 nfsv4stateid_t st; 5207 struct mbuf *m, *m2; 5208 int error = 0, retlen, tlen, trimlen; 5209 5210 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 5211 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5212 *mpp = NULL; 5213 /* 5214 * Use a stateid where other is an alternating 01010 pattern and 5215 * seqid is 0xffffffff. This value is not defined as special by 5216 * the RFC and is used by the FreeBSD NFS server to indicate an 5217 * MDS->DS proxy operation. 5218 */ 5219 st.other[0] = 0x55555555; 5220 st.other[1] = 0x55555555; 5221 st.other[2] = 0x55555555; 5222 st.seqid = 0xffffffff; 5223 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5224 NULL, NULL, 0, 0, cred); 5225 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5226 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 5227 txdr_hyper(off, tl); 5228 *(tl + 2) = txdr_unsigned(len); 5229 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5230 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5231 if (error != 0) { 5232 free(nd, M_TEMP); 5233 return (error); 5234 } 5235 if (nd->nd_repstat == 0) { 5236 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 5237 NFSM_STRSIZ(retlen, len); 5238 if (retlen > 0) { 5239 /* Trim off the pre-data XDR from the mbuf chain. */ 5240 m = nd->nd_mrep; 5241 while (m != NULL && m != nd->nd_md) { 5242 if (m->m_next == nd->nd_md) { 5243 m->m_next = NULL; 5244 m_freem(nd->nd_mrep); 5245 nd->nd_mrep = m = nd->nd_md; 5246 } else 5247 m = m->m_next; 5248 } 5249 if (m == NULL) { 5250 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5251 error = ENOENT; 5252 goto nfsmout; 5253 } 5254 5255 /* 5256 * Now, adjust first mbuf so that any XDR before the 5257 * read data is skipped over. 5258 */ 5259 trimlen = nd->nd_dpos - mtod(m, char *); 5260 if (trimlen > 0) { 5261 m->m_len -= trimlen; 5262 NFSM_DATAP(m, trimlen); 5263 } 5264 5265 /* 5266 * Truncate the mbuf chain at retlen bytes of data, 5267 * plus XDR padding that brings the length up to a 5268 * multiple of 4. 5269 */ 5270 tlen = NFSM_RNDUP(retlen); 5271 do { 5272 if (m->m_len >= tlen) { 5273 m->m_len = tlen; 5274 tlen = 0; 5275 m2 = m->m_next; 5276 m->m_next = NULL; 5277 m_freem(m2); 5278 break; 5279 } 5280 tlen -= m->m_len; 5281 m = m->m_next; 5282 } while (m != NULL); 5283 if (tlen > 0) { 5284 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5285 error = ENOENT; 5286 goto nfsmout; 5287 } 5288 *mpp = nd->nd_mrep; 5289 *mpendp = m; 5290 nd->nd_mrep = NULL; 5291 } 5292 } else 5293 error = nd->nd_repstat; 5294 nfsmout: 5295 /* If nd->nd_mrep is already NULL, this is a no-op. */ 5296 m_freem(nd->nd_mrep); 5297 free(nd, M_TEMP); 5298 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 5299 return (error); 5300 } 5301 5302 /* 5303 * Do a write RPC on a DS data file, using this structure for the arguments, 5304 * so that this function can be executed by a separate kernel process. 5305 */ 5306 struct nfsrvwritedsdorpc { 5307 int done; 5308 int inprog; 5309 struct task tsk; 5310 fhandle_t fh; 5311 off_t off; 5312 int len; 5313 struct nfsmount *nmp; 5314 struct ucred *cred; 5315 NFSPROC_T *p; 5316 struct mbuf *m; 5317 int err; 5318 }; 5319 5320 static int 5321 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 5322 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 5323 { 5324 uint32_t *tl; 5325 struct nfsrv_descript *nd; 5326 nfsattrbit_t attrbits; 5327 nfsv4stateid_t st; 5328 int commit, error, retlen; 5329 5330 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5331 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 5332 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 5333 5334 /* 5335 * Use a stateid where other is an alternating 01010 pattern and 5336 * seqid is 0xffffffff. This value is not defined as special by 5337 * the RFC and is used by the FreeBSD NFS server to indicate an 5338 * MDS->DS proxy operation. 5339 */ 5340 st.other[0] = 0x55555555; 5341 st.other[1] = 0x55555555; 5342 st.other[2] = 0x55555555; 5343 st.seqid = 0xffffffff; 5344 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5345 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 5346 txdr_hyper(off, tl); 5347 tl += 2; 5348 /* 5349 * Do all writes FileSync, since the server doesn't hold onto dirty 5350 * buffers. Since clients should be accessing the DS servers directly 5351 * using the pNFS layouts, this just needs to work correctly as a 5352 * fallback. 5353 */ 5354 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 5355 *tl = txdr_unsigned(len); 5356 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 5357 5358 /* Put data in mbuf chain. */ 5359 nd->nd_mb->m_next = m; 5360 5361 /* Set nd_mb and nd_bpos to end of data. */ 5362 while (m->m_next != NULL) 5363 m = m->m_next; 5364 nd->nd_mb = m; 5365 nfsm_set(nd, m->m_len); 5366 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 5367 5368 /* Do a Getattr for the attributes that change upon writing. */ 5369 NFSZERO_ATTRBIT(&attrbits); 5370 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5371 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5372 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5373 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5374 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5375 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5376 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5377 (void) nfsrv_putattrbit(nd, &attrbits); 5378 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5379 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5380 if (error != 0) { 5381 free(nd, M_TEMP); 5382 return (error); 5383 } 5384 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 5385 /* Get rid of weak cache consistency data for now. */ 5386 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5387 (ND_NFSV4 | ND_V4WCCATTR)) { 5388 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5389 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5390 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 5391 if (error != 0) 5392 goto nfsmout; 5393 /* 5394 * Get rid of Op# and status for next op. 5395 */ 5396 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5397 if (*++tl != 0) 5398 nd->nd_flag |= ND_NOMOREDATA; 5399 } 5400 if (nd->nd_repstat == 0) { 5401 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 5402 retlen = fxdr_unsigned(int, *tl++); 5403 commit = fxdr_unsigned(int, *tl); 5404 if (commit != NFSWRITE_FILESYNC) 5405 error = NFSERR_IO; 5406 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 5407 retlen, commit, error); 5408 } else 5409 error = nd->nd_repstat; 5410 /* We have no use for the Write Verifier since we use FileSync. */ 5411 5412 /* 5413 * Get the Change, Size, Access Time and Modify Time attributes and set 5414 * on the Metadata file, so its attributes will be what the file's 5415 * would be if it had been written. 5416 */ 5417 if (error == 0) { 5418 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5419 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5420 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5421 } 5422 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 5423 nfsmout: 5424 m_freem(nd->nd_mrep); 5425 free(nd, M_TEMP); 5426 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 5427 return (error); 5428 } 5429 5430 /* 5431 * Start up the thread that will execute nfsrv_writedsdorpc(). 5432 */ 5433 static void 5434 start_writedsdorpc(void *arg, int pending) 5435 { 5436 struct nfsrvwritedsdorpc *drpc; 5437 5438 drpc = (struct nfsrvwritedsdorpc *)arg; 5439 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5440 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5441 drpc->done = 1; 5442 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5443 } 5444 5445 static int 5446 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5447 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5448 struct mbuf **mpp, char *cp, int *failposp) 5449 { 5450 struct nfsrvwritedsdorpc *drpc, *tdrpc = NULL; 5451 struct nfsvattr na; 5452 struct mbuf *m; 5453 int error, i, offs, ret, timo; 5454 5455 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5456 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5457 drpc = NULL; 5458 if (mirrorcnt > 1) 5459 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5460 M_WAITOK); 5461 5462 /* Calculate offset in mbuf chain that data starts. */ 5463 offs = cp - mtod(*mpp, char *); 5464 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5465 5466 /* 5467 * Do the write RPC for every DS, using a separate kernel process 5468 * for every DS except the last one. 5469 */ 5470 error = 0; 5471 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5472 tdrpc->done = 0; 5473 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5474 tdrpc->off = off; 5475 tdrpc->len = len; 5476 tdrpc->nmp = *nmpp; 5477 tdrpc->cred = cred; 5478 tdrpc->p = p; 5479 tdrpc->inprog = 0; 5480 tdrpc->err = 0; 5481 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5482 ret = EIO; 5483 if (nfs_pnfsiothreads != 0) { 5484 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5485 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5486 ret); 5487 } 5488 if (ret != 0) { 5489 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5490 tdrpc->m, cred, p); 5491 if (nfsds_failerr(ret) && *failposp == -1) 5492 *failposp = i; 5493 else if (error == 0 && ret != 0) 5494 error = ret; 5495 } 5496 nmpp++; 5497 fhp++; 5498 } 5499 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5500 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5501 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5502 *failposp = mirrorcnt - 1; 5503 else if (error == 0 && ret != 0) 5504 error = ret; 5505 if (error == 0) 5506 error = nfsrv_setextattr(vp, &na, p); 5507 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5508 tdrpc = drpc; 5509 timo = hz / 50; /* Wait for 20msec. */ 5510 if (timo < 1) 5511 timo = 1; 5512 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5513 /* Wait for RPCs on separate threads to complete. */ 5514 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5515 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5516 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5517 *failposp = i; 5518 else if (error == 0 && tdrpc->err != 0) 5519 error = tdrpc->err; 5520 } 5521 free(drpc, M_TEMP); 5522 return (error); 5523 } 5524 5525 /* 5526 * Do a allocate RPC on a DS data file, using this structure for the arguments, 5527 * so that this function can be executed by a separate kernel process. 5528 */ 5529 struct nfsrvallocatedsdorpc { 5530 int done; 5531 int inprog; 5532 struct task tsk; 5533 fhandle_t fh; 5534 off_t off; 5535 off_t len; 5536 struct nfsmount *nmp; 5537 struct ucred *cred; 5538 NFSPROC_T *p; 5539 int err; 5540 }; 5541 5542 static int 5543 nfsrv_allocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5544 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5545 { 5546 uint32_t *tl; 5547 struct nfsrv_descript *nd; 5548 nfsattrbit_t attrbits; 5549 nfsv4stateid_t st; 5550 int error; 5551 5552 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5553 nfscl_reqstart(nd, NFSPROC_ALLOCATE, nmp, (u_int8_t *)fhp, 5554 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 5555 5556 /* 5557 * Use a stateid where other is an alternating 01010 pattern and 5558 * seqid is 0xffffffff. This value is not defined as special by 5559 * the RFC and is used by the FreeBSD NFS server to indicate an 5560 * MDS->DS proxy operation. 5561 */ 5562 st.other[0] = 0x55555555; 5563 st.other[1] = 0x55555555; 5564 st.other[2] = 0x55555555; 5565 st.seqid = 0xffffffff; 5566 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5567 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5568 txdr_hyper(off, tl); tl += 2; 5569 txdr_hyper(len, tl); tl += 2; 5570 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: len=%jd\n", (intmax_t)len); 5571 5572 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5573 NFSGETATTR_ATTRBIT(&attrbits); 5574 nfsrv_putattrbit(nd, &attrbits); 5575 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5576 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5577 if (error != 0) { 5578 free(nd, M_TEMP); 5579 return (error); 5580 } 5581 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft allocaterpc=%d\n", 5582 nd->nd_repstat); 5583 if (nd->nd_repstat == 0) { 5584 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5585 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5586 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5587 } else 5588 error = nd->nd_repstat; 5589 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft loadattr=%d\n", error); 5590 nfsmout: 5591 m_freem(nd->nd_mrep); 5592 free(nd, M_TEMP); 5593 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc error=%d\n", error); 5594 return (error); 5595 } 5596 5597 /* 5598 * Start up the thread that will execute nfsrv_allocatedsdorpc(). 5599 */ 5600 static void 5601 start_allocatedsdorpc(void *arg, int pending) 5602 { 5603 struct nfsrvallocatedsdorpc *drpc; 5604 5605 drpc = (struct nfsrvallocatedsdorpc *)arg; 5606 drpc->err = nfsrv_allocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5607 drpc->len, NULL, drpc->cred, drpc->p); 5608 drpc->done = 1; 5609 NFSD_DEBUG(4, "start_allocatedsdorpc: err=%d\n", drpc->err); 5610 } 5611 5612 static int 5613 nfsrv_allocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5614 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5615 int *failposp) 5616 { 5617 struct nfsrvallocatedsdorpc *drpc, *tdrpc = NULL; 5618 struct nfsvattr na; 5619 int error, i, ret, timo; 5620 5621 NFSD_DEBUG(4, "in nfsrv_allocatedsrpc\n"); 5622 drpc = NULL; 5623 if (mirrorcnt > 1) 5624 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5625 M_WAITOK); 5626 5627 /* 5628 * Do the allocate RPC for every DS, using a separate kernel process 5629 * for every DS except the last one. 5630 */ 5631 error = 0; 5632 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5633 tdrpc->done = 0; 5634 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5635 tdrpc->off = off; 5636 tdrpc->len = len; 5637 tdrpc->nmp = *nmpp; 5638 tdrpc->cred = cred; 5639 tdrpc->p = p; 5640 tdrpc->inprog = 0; 5641 tdrpc->err = 0; 5642 ret = EIO; 5643 if (nfs_pnfsiothreads != 0) { 5644 ret = nfs_pnfsio(start_allocatedsdorpc, tdrpc); 5645 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: nfs_pnfsio=%d\n", 5646 ret); 5647 } 5648 if (ret != 0) { 5649 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, NULL, 5650 cred, p); 5651 if (nfsds_failerr(ret) && *failposp == -1) 5652 *failposp = i; 5653 else if (error == 0 && ret != 0) 5654 error = ret; 5655 } 5656 nmpp++; 5657 fhp++; 5658 } 5659 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5660 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5661 *failposp = mirrorcnt - 1; 5662 else if (error == 0 && ret != 0) 5663 error = ret; 5664 if (error == 0) 5665 error = nfsrv_setextattr(vp, &na, p); 5666 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: aft setextat=%d\n", error); 5667 tdrpc = drpc; 5668 timo = hz / 50; /* Wait for 20msec. */ 5669 if (timo < 1) 5670 timo = 1; 5671 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5672 /* Wait for RPCs on separate threads to complete. */ 5673 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5674 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5675 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5676 *failposp = i; 5677 else if (error == 0 && tdrpc->err != 0) 5678 error = tdrpc->err; 5679 } 5680 free(drpc, M_TEMP); 5681 return (error); 5682 } 5683 5684 /* 5685 * Do a deallocate RPC on a DS data file, using this structure for the 5686 * arguments, so that this function can be executed by a separate kernel 5687 * process. 5688 */ 5689 struct nfsrvdeallocatedsdorpc { 5690 int done; 5691 int inprog; 5692 struct task tsk; 5693 fhandle_t fh; 5694 off_t off; 5695 off_t len; 5696 struct nfsmount *nmp; 5697 struct ucred *cred; 5698 NFSPROC_T *p; 5699 int err; 5700 }; 5701 5702 static int 5703 nfsrv_deallocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5704 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5705 { 5706 uint32_t *tl; 5707 struct nfsrv_descript *nd; 5708 nfsattrbit_t attrbits; 5709 nfsv4stateid_t st; 5710 int error; 5711 5712 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5713 nfscl_reqstart(nd, NFSPROC_DEALLOCATE, nmp, (u_int8_t *)fhp, 5714 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 5715 5716 /* 5717 * Use a stateid where other is an alternating 01010 pattern and 5718 * seqid is 0xffffffff. This value is not defined as special by 5719 * the RFC and is used by the FreeBSD NFS server to indicate an 5720 * MDS->DS proxy operation. 5721 */ 5722 st.other[0] = 0x55555555; 5723 st.other[1] = 0x55555555; 5724 st.other[2] = 0x55555555; 5725 st.seqid = 0xffffffff; 5726 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5727 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5728 txdr_hyper(off, tl); tl += 2; 5729 txdr_hyper(len, tl); tl += 2; 5730 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: len=%jd\n", (intmax_t)len); 5731 5732 /* Do a Getattr for the attributes that change upon writing. */ 5733 NFSZERO_ATTRBIT(&attrbits); 5734 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5735 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5736 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5737 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5738 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5739 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5740 nfsrv_putattrbit(nd, &attrbits); 5741 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5742 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5743 if (error != 0) { 5744 free(nd, M_TEMP); 5745 return (error); 5746 } 5747 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: aft deallocaterpc=%d\n", 5748 nd->nd_repstat); 5749 /* Get rid of weak cache consistency data for now. */ 5750 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5751 (ND_NFSV4 | ND_V4WCCATTR)) { 5752 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5753 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5754 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: wcc attr=%d\n", error); 5755 if (error != 0) 5756 goto nfsmout; 5757 /* 5758 * Get rid of Op# and status for next op. 5759 */ 5760 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5761 if (*++tl != 0) 5762 nd->nd_flag |= ND_NOMOREDATA; 5763 } 5764 if (nd->nd_repstat == 0) { 5765 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5766 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5767 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5768 } else 5769 error = nd->nd_repstat; 5770 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: aft loadattr=%d\n", error); 5771 nfsmout: 5772 m_freem(nd->nd_mrep); 5773 free(nd, M_TEMP); 5774 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc error=%d\n", error); 5775 return (error); 5776 } 5777 5778 /* 5779 * Start up the thread that will execute nfsrv_deallocatedsdorpc(). 5780 */ 5781 static void 5782 start_deallocatedsdorpc(void *arg, int pending) 5783 { 5784 struct nfsrvdeallocatedsdorpc *drpc; 5785 5786 drpc = (struct nfsrvdeallocatedsdorpc *)arg; 5787 drpc->err = nfsrv_deallocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5788 drpc->len, NULL, drpc->cred, drpc->p); 5789 drpc->done = 1; 5790 NFSD_DEBUG(4, "start_deallocatedsdorpc: err=%d\n", drpc->err); 5791 } 5792 5793 static int 5794 nfsrv_deallocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5795 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5796 int *failposp) 5797 { 5798 struct nfsrvdeallocatedsdorpc *drpc, *tdrpc = NULL; 5799 struct nfsvattr na; 5800 int error, i, ret, timo; 5801 5802 NFSD_DEBUG(4, "in nfsrv_deallocatedsrpc\n"); 5803 drpc = NULL; 5804 if (mirrorcnt > 1) 5805 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5806 M_WAITOK); 5807 5808 /* 5809 * Do the deallocate RPC for every DS, using a separate kernel process 5810 * for every DS except the last one. 5811 */ 5812 error = 0; 5813 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5814 tdrpc->done = 0; 5815 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5816 tdrpc->off = off; 5817 tdrpc->len = len; 5818 tdrpc->nmp = *nmpp; 5819 tdrpc->cred = cred; 5820 tdrpc->p = p; 5821 tdrpc->inprog = 0; 5822 tdrpc->err = 0; 5823 ret = EIO; 5824 if (nfs_pnfsiothreads != 0) { 5825 ret = nfs_pnfsio(start_deallocatedsdorpc, tdrpc); 5826 NFSD_DEBUG(4, "nfsrv_deallocatedsrpc: nfs_pnfsio=%d\n", 5827 ret); 5828 } 5829 if (ret != 0) { 5830 ret = nfsrv_deallocatedsdorpc(*nmpp, fhp, off, len, 5831 NULL, cred, p); 5832 if (nfsds_failerr(ret) && *failposp == -1) 5833 *failposp = i; 5834 else if (error == 0 && ret != 0) 5835 error = ret; 5836 } 5837 nmpp++; 5838 fhp++; 5839 } 5840 ret = nfsrv_deallocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5841 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5842 *failposp = mirrorcnt - 1; 5843 else if (error == 0 && ret != 0) 5844 error = ret; 5845 if (error == 0) 5846 error = nfsrv_setextattr(vp, &na, p); 5847 NFSD_DEBUG(4, "nfsrv_deallocatedsrpc: aft setextat=%d\n", error); 5848 tdrpc = drpc; 5849 timo = hz / 50; /* Wait for 20msec. */ 5850 if (timo < 1) 5851 timo = 1; 5852 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5853 /* Wait for RPCs on separate threads to complete. */ 5854 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5855 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5856 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5857 *failposp = i; 5858 else if (error == 0 && tdrpc->err != 0) 5859 error = tdrpc->err; 5860 } 5861 free(drpc, M_TEMP); 5862 return (error); 5863 } 5864 5865 static int 5866 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5867 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5868 struct nfsvattr *dsnap) 5869 { 5870 uint32_t *tl; 5871 struct nfsrv_descript *nd; 5872 nfsv4stateid_t st; 5873 nfsattrbit_t attrbits; 5874 int error; 5875 5876 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5877 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5878 /* 5879 * Use a stateid where other is an alternating 01010 pattern and 5880 * seqid is 0xffffffff. This value is not defined as special by 5881 * the RFC and is used by the FreeBSD NFS server to indicate an 5882 * MDS->DS proxy operation. 5883 */ 5884 st.other[0] = 0x55555555; 5885 st.other[1] = 0x55555555; 5886 st.other[2] = 0x55555555; 5887 st.seqid = 0xffffffff; 5888 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5889 NULL, NULL, 0, 0, cred); 5890 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5891 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5892 5893 /* Do a Getattr for the attributes that change due to writing. */ 5894 NFSZERO_ATTRBIT(&attrbits); 5895 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5896 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5897 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5898 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5899 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5900 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5901 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5902 (void) nfsrv_putattrbit(nd, &attrbits); 5903 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5904 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5905 if (error != 0) { 5906 free(nd, M_TEMP); 5907 return (error); 5908 } 5909 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5910 nd->nd_repstat); 5911 /* Get rid of weak cache consistency data for now. */ 5912 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5913 (ND_NFSV4 | ND_V4WCCATTR)) { 5914 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5915 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5916 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5917 if (error != 0) 5918 goto nfsmout; 5919 /* 5920 * Get rid of Op# and status for next op. 5921 */ 5922 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5923 if (*++tl != 0) 5924 nd->nd_flag |= ND_NOMOREDATA; 5925 } 5926 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5927 if (error != 0) 5928 goto nfsmout; 5929 if (nd->nd_repstat != 0) 5930 error = nd->nd_repstat; 5931 /* 5932 * Get the Change, Size, Access Time and Modify Time attributes and set 5933 * on the Metadata file, so its attributes will be what the file's 5934 * would be if it had been written. 5935 */ 5936 if (error == 0) { 5937 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5938 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5939 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5940 } 5941 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5942 nfsmout: 5943 m_freem(nd->nd_mrep); 5944 free(nd, M_TEMP); 5945 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5946 return (error); 5947 } 5948 5949 struct nfsrvsetattrdsdorpc { 5950 int done; 5951 int inprog; 5952 struct task tsk; 5953 fhandle_t fh; 5954 struct nfsmount *nmp; 5955 struct vnode *vp; 5956 struct ucred *cred; 5957 NFSPROC_T *p; 5958 struct nfsvattr na; 5959 struct nfsvattr dsna; 5960 int err; 5961 }; 5962 5963 /* 5964 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5965 */ 5966 static void 5967 start_setattrdsdorpc(void *arg, int pending) 5968 { 5969 struct nfsrvsetattrdsdorpc *drpc; 5970 5971 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5972 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5973 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5974 drpc->done = 1; 5975 } 5976 5977 static int 5978 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5979 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5980 struct nfsvattr *nap, int *failposp) 5981 { 5982 struct nfsrvsetattrdsdorpc *drpc, *tdrpc = NULL; 5983 struct nfsvattr na; 5984 int error, i, ret, timo; 5985 5986 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5987 drpc = NULL; 5988 if (mirrorcnt > 1) 5989 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5990 M_WAITOK); 5991 5992 /* 5993 * Do the setattr RPC for every DS, using a separate kernel process 5994 * for every DS except the last one. 5995 */ 5996 error = 0; 5997 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5998 tdrpc->done = 0; 5999 tdrpc->inprog = 0; 6000 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 6001 tdrpc->nmp = *nmpp; 6002 tdrpc->vp = vp; 6003 tdrpc->cred = cred; 6004 tdrpc->p = p; 6005 tdrpc->na = *nap; 6006 tdrpc->err = 0; 6007 ret = EIO; 6008 if (nfs_pnfsiothreads != 0) { 6009 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 6010 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 6011 ret); 6012 } 6013 if (ret != 0) { 6014 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 6015 &na); 6016 if (nfsds_failerr(ret) && *failposp == -1) 6017 *failposp = i; 6018 else if (error == 0 && ret != 0) 6019 error = ret; 6020 } 6021 nmpp++; 6022 fhp++; 6023 } 6024 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 6025 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 6026 *failposp = mirrorcnt - 1; 6027 else if (error == 0 && ret != 0) 6028 error = ret; 6029 if (error == 0) 6030 error = nfsrv_setextattr(vp, &na, p); 6031 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 6032 tdrpc = drpc; 6033 timo = hz / 50; /* Wait for 20msec. */ 6034 if (timo < 1) 6035 timo = 1; 6036 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6037 /* Wait for RPCs on separate threads to complete. */ 6038 while (tdrpc->inprog != 0 && tdrpc->done == 0) 6039 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 6040 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 6041 *failposp = i; 6042 else if (error == 0 && tdrpc->err != 0) 6043 error = tdrpc->err; 6044 } 6045 free(drpc, M_TEMP); 6046 return (error); 6047 } 6048 6049 /* 6050 * Do a Setattr of an NFSv4 ACL on the DS file. 6051 */ 6052 static int 6053 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6054 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 6055 { 6056 struct nfsrv_descript *nd; 6057 nfsv4stateid_t st; 6058 nfsattrbit_t attrbits; 6059 int error; 6060 6061 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 6062 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6063 /* 6064 * Use a stateid where other is an alternating 01010 pattern and 6065 * seqid is 0xffffffff. This value is not defined as special by 6066 * the RFC and is used by the FreeBSD NFS server to indicate an 6067 * MDS->DS proxy operation. 6068 */ 6069 st.other[0] = 0x55555555; 6070 st.other[1] = 0x55555555; 6071 st.other[2] = 0x55555555; 6072 st.seqid = 0xffffffff; 6073 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 6074 NULL, NULL, 0, 0, cred); 6075 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 6076 NFSZERO_ATTRBIT(&attrbits); 6077 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 6078 /* 6079 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 6080 * so passing in the metadata "vp" will be ok, since it is of 6081 * the same type (VREG). 6082 */ 6083 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 6084 NULL, 0, 0, 0, 0, 0, NULL); 6085 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6086 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6087 if (error != 0) { 6088 free(nd, M_TEMP); 6089 return (error); 6090 } 6091 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 6092 nd->nd_repstat); 6093 error = nd->nd_repstat; 6094 m_freem(nd->nd_mrep); 6095 free(nd, M_TEMP); 6096 return (error); 6097 } 6098 6099 struct nfsrvsetacldsdorpc { 6100 int done; 6101 int inprog; 6102 struct task tsk; 6103 fhandle_t fh; 6104 struct nfsmount *nmp; 6105 struct vnode *vp; 6106 struct ucred *cred; 6107 NFSPROC_T *p; 6108 struct acl *aclp; 6109 int err; 6110 }; 6111 6112 /* 6113 * Start up the thread that will execute nfsrv_setacldsdorpc(). 6114 */ 6115 static void 6116 start_setacldsdorpc(void *arg, int pending) 6117 { 6118 struct nfsrvsetacldsdorpc *drpc; 6119 6120 drpc = (struct nfsrvsetacldsdorpc *)arg; 6121 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 6122 drpc->vp, drpc->nmp, drpc->aclp); 6123 drpc->done = 1; 6124 } 6125 6126 static int 6127 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6128 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 6129 int *failposp) 6130 { 6131 struct nfsrvsetacldsdorpc *drpc, *tdrpc = NULL; 6132 int error, i, ret, timo; 6133 6134 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 6135 drpc = NULL; 6136 if (mirrorcnt > 1) 6137 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 6138 M_WAITOK); 6139 6140 /* 6141 * Do the setattr RPC for every DS, using a separate kernel process 6142 * for every DS except the last one. 6143 */ 6144 error = 0; 6145 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6146 tdrpc->done = 0; 6147 tdrpc->inprog = 0; 6148 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 6149 tdrpc->nmp = *nmpp; 6150 tdrpc->vp = vp; 6151 tdrpc->cred = cred; 6152 tdrpc->p = p; 6153 tdrpc->aclp = aclp; 6154 tdrpc->err = 0; 6155 ret = EIO; 6156 if (nfs_pnfsiothreads != 0) { 6157 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 6158 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 6159 ret); 6160 } 6161 if (ret != 0) { 6162 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 6163 aclp); 6164 if (nfsds_failerr(ret) && *failposp == -1) 6165 *failposp = i; 6166 else if (error == 0 && ret != 0) 6167 error = ret; 6168 } 6169 nmpp++; 6170 fhp++; 6171 } 6172 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 6173 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 6174 *failposp = mirrorcnt - 1; 6175 else if (error == 0 && ret != 0) 6176 error = ret; 6177 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 6178 tdrpc = drpc; 6179 timo = hz / 50; /* Wait for 20msec. */ 6180 if (timo < 1) 6181 timo = 1; 6182 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6183 /* Wait for RPCs on separate threads to complete. */ 6184 while (tdrpc->inprog != 0 && tdrpc->done == 0) 6185 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 6186 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 6187 *failposp = i; 6188 else if (error == 0 && tdrpc->err != 0) 6189 error = tdrpc->err; 6190 } 6191 free(drpc, M_TEMP); 6192 return (error); 6193 } 6194 6195 /* 6196 * Getattr call to the DS for the attributes that change due to writing. 6197 */ 6198 static int 6199 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6200 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 6201 { 6202 struct nfsrv_descript *nd; 6203 int error; 6204 nfsattrbit_t attrbits; 6205 6206 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 6207 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6208 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 6209 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 6210 NFSZERO_ATTRBIT(&attrbits); 6211 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 6212 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 6213 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 6214 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 6215 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 6216 (void) nfsrv_putattrbit(nd, &attrbits); 6217 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6218 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6219 if (error != 0) { 6220 free(nd, M_TEMP); 6221 return (error); 6222 } 6223 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 6224 nd->nd_repstat); 6225 if (nd->nd_repstat == 0) { 6226 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 6227 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 6228 NULL, NULL); 6229 /* 6230 * We can only save the updated values in the extended 6231 * attribute if the vp is exclusively locked. 6232 * This should happen when any of the following operations 6233 * occur on the vnode: 6234 * Close, Delegreturn, LayoutCommit, LayoutReturn 6235 * As such, the updated extended attribute should get saved 6236 * before nfsrv_checkdsattr() returns 0 and allows the cached 6237 * attributes to be returned without calling this function. 6238 */ 6239 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 6240 error = nfsrv_setextattr(vp, nap, p); 6241 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 6242 error); 6243 } 6244 } else 6245 error = nd->nd_repstat; 6246 m_freem(nd->nd_mrep); 6247 free(nd, M_TEMP); 6248 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 6249 return (error); 6250 } 6251 6252 /* 6253 * Seek call to a DS. 6254 */ 6255 static int 6256 nfsrv_seekdsrpc(fhandle_t *fhp, off_t *offp, int content, bool *eofp, 6257 struct ucred *cred, NFSPROC_T *p, struct nfsmount *nmp) 6258 { 6259 uint32_t *tl; 6260 struct nfsrv_descript *nd; 6261 nfsv4stateid_t st; 6262 int error; 6263 6264 NFSD_DEBUG(4, "in nfsrv_seekdsrpc\n"); 6265 /* 6266 * Use a stateid where other is an alternating 01010 pattern and 6267 * seqid is 0xffffffff. This value is not defined as special by 6268 * the RFC and is used by the FreeBSD NFS server to indicate an 6269 * MDS->DS proxy operation. 6270 */ 6271 st.other[0] = 0x55555555; 6272 st.other[1] = 0x55555555; 6273 st.other[2] = 0x55555555; 6274 st.seqid = 0xffffffff; 6275 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6276 nfscl_reqstart(nd, NFSPROC_SEEKDS, nmp, (u_int8_t *)fhp, 6277 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 6278 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 6279 NFSM_BUILD(tl, uint32_t *, NFSX_HYPER + NFSX_UNSIGNED); 6280 txdr_hyper(*offp, tl); tl += 2; 6281 *tl = txdr_unsigned(content); 6282 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6283 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6284 if (error != 0) { 6285 free(nd, M_TEMP); 6286 return (error); 6287 } 6288 NFSD_DEBUG(4, "nfsrv_seekdsrpc: aft seekrpc=%d\n", nd->nd_repstat); 6289 if (nd->nd_repstat == 0) { 6290 NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED + NFSX_HYPER); 6291 if (*tl++ == newnfs_true) 6292 *eofp = true; 6293 else 6294 *eofp = false; 6295 *offp = fxdr_hyper(tl); 6296 } else 6297 error = nd->nd_repstat; 6298 nfsmout: 6299 m_freem(nd->nd_mrep); 6300 free(nd, M_TEMP); 6301 NFSD_DEBUG(4, "nfsrv_seekdsrpc error=%d\n", error); 6302 return (error); 6303 } 6304 6305 /* 6306 * Get the device id and file handle for a DS file. 6307 */ 6308 int 6309 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 6310 fhandle_t *fhp, char *devid) 6311 { 6312 int buflen, error; 6313 char *buf; 6314 6315 buflen = 1024; 6316 buf = malloc(buflen, M_TEMP, M_WAITOK); 6317 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 6318 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 6319 free(buf, M_TEMP); 6320 return (error); 6321 } 6322 6323 /* 6324 * Do a Lookup against the DS for the filename. 6325 */ 6326 static int 6327 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 6328 struct vnode **nvpp, NFSPROC_T *p) 6329 { 6330 struct nameidata named; 6331 struct ucred *tcred; 6332 char *bufp; 6333 u_long *hashp; 6334 struct vnode *nvp; 6335 int error; 6336 6337 tcred = newnfs_getcred(); 6338 named.ni_cnd.cn_nameiop = LOOKUP; 6339 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 6340 named.ni_cnd.cn_cred = tcred; 6341 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF; 6342 nfsvno_setpathbuf(&named, &bufp, &hashp); 6343 named.ni_cnd.cn_nameptr = bufp; 6344 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 6345 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 6346 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 6347 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 6348 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 6349 NFSFREECRED(tcred); 6350 nfsvno_relpathbuf(&named); 6351 if (error == 0) 6352 *nvpp = nvp; 6353 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 6354 return (error); 6355 } 6356 6357 /* 6358 * Set the file handle to the correct one. 6359 */ 6360 static void 6361 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 6362 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 6363 { 6364 struct nfsnode *np; 6365 int ret = 0; 6366 6367 np = VTONFS(nvp); 6368 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 6369 /* 6370 * We can only do a vn_set_extattr() if the vnode is exclusively 6371 * locked and vn_start_write() has been done. If devid != NULL or 6372 * fnamep != NULL or the vnode is shared locked, vn_start_write() 6373 * may not have been done. 6374 * If not done now, it will be done on a future call. 6375 */ 6376 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 6377 LK_EXCLUSIVE) 6378 ret = vn_extattr_set(vp, IO_NODELOCKED, 6379 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 6380 (char *)pf, p); 6381 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 6382 } 6383 6384 /* 6385 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 6386 * when the DS has failed. 6387 */ 6388 void 6389 nfsrv_killrpcs(struct nfsmount *nmp) 6390 { 6391 6392 /* 6393 * Call newnfs_nmcancelreqs() to cause 6394 * any RPCs in progress on the mount point to 6395 * fail. 6396 * This will cause any process waiting for an 6397 * RPC to complete while holding a vnode lock 6398 * on the mounted-on vnode (such as "df" or 6399 * a non-forced "umount") to fail. 6400 * This will unlock the mounted-on vnode so 6401 * a forced dismount can succeed. 6402 * The NFSMNTP_CANCELRPCS flag should be set when this function is 6403 * called. 6404 */ 6405 newnfs_nmcancelreqs(nmp); 6406 } 6407 6408 /* 6409 * Sum up the statfs info for each of the DSs, so that the client will 6410 * receive the total for all DSs. 6411 */ 6412 static int 6413 nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp) 6414 { 6415 struct statfs *tsf; 6416 struct nfsdevice *ds; 6417 struct vnode **dvpp, **tdvpp, *dvp; 6418 uint64_t tot; 6419 int cnt, error = 0, i; 6420 6421 if (nfsrv_devidcnt <= 0) 6422 return (ENXIO); 6423 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 6424 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 6425 6426 /* Get an array of the dvps for the DSs. */ 6427 tdvpp = dvpp; 6428 i = 0; 6429 NFSDDSLOCK(); 6430 /* First, search for matches for same file system. */ 6431 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6432 if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 && 6433 fsidcmp(&ds->nfsdev_mdsfsid, &mp->mnt_stat.f_fsid) == 0) { 6434 if (++i > nfsrv_devidcnt) 6435 break; 6436 *tdvpp++ = ds->nfsdev_dvp; 6437 } 6438 } 6439 /* 6440 * If no matches for same file system, total all servers not assigned 6441 * to a file system. 6442 */ 6443 if (i == 0) { 6444 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6445 if (ds->nfsdev_nmp != NULL && 6446 ds->nfsdev_mdsisset == 0) { 6447 if (++i > nfsrv_devidcnt) 6448 break; 6449 *tdvpp++ = ds->nfsdev_dvp; 6450 } 6451 } 6452 } 6453 NFSDDSUNLOCK(); 6454 cnt = i; 6455 6456 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 6457 tdvpp = dvpp; 6458 for (i = 0; i < cnt && error == 0; i++) { 6459 dvp = *tdvpp++; 6460 error = VFS_STATFS(dvp->v_mount, tsf); 6461 if (error == 0) { 6462 if (sf->f_bsize == 0) { 6463 if (tsf->f_bsize > 0) 6464 sf->f_bsize = tsf->f_bsize; 6465 else 6466 sf->f_bsize = 8192; 6467 } 6468 if (tsf->f_blocks > 0) { 6469 if (sf->f_bsize != tsf->f_bsize) { 6470 tot = tsf->f_blocks * tsf->f_bsize; 6471 sf->f_blocks += (tot / sf->f_bsize); 6472 } else 6473 sf->f_blocks += tsf->f_blocks; 6474 } 6475 if (tsf->f_bfree > 0) { 6476 if (sf->f_bsize != tsf->f_bsize) { 6477 tot = tsf->f_bfree * tsf->f_bsize; 6478 sf->f_bfree += (tot / sf->f_bsize); 6479 } else 6480 sf->f_bfree += tsf->f_bfree; 6481 } 6482 if (tsf->f_bavail > 0) { 6483 if (sf->f_bsize != tsf->f_bsize) { 6484 tot = tsf->f_bavail * tsf->f_bsize; 6485 sf->f_bavail += (tot / sf->f_bsize); 6486 } else 6487 sf->f_bavail += tsf->f_bavail; 6488 } 6489 } 6490 } 6491 free(tsf, M_TEMP); 6492 free(dvpp, M_TEMP); 6493 return (error); 6494 } 6495 6496 /* 6497 * Set an NFSv4 acl. 6498 */ 6499 int 6500 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 6501 { 6502 int error; 6503 6504 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 6505 error = NFSERR_ATTRNOTSUPP; 6506 goto out; 6507 } 6508 /* 6509 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 6510 * Make sure it has enough room for that - splitting every entry 6511 * into two and appending "canonical six" entries at the end. 6512 * Cribbed out of kern/vfs_acl.c - Rick M. 6513 */ 6514 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 6515 error = NFSERR_ATTRNOTSUPP; 6516 goto out; 6517 } 6518 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 6519 if (error == 0) { 6520 error = nfsrv_dssetacl(vp, aclp, cred, p); 6521 if (error == ENOENT) 6522 error = 0; 6523 } 6524 6525 out: 6526 NFSEXITCODE(error); 6527 return (error); 6528 } 6529 6530 /* 6531 * Seek vnode op call (actually it is a VOP_IOCTL()). 6532 * This function is called with the vnode locked, but unlocks and vrele()s 6533 * the vp before returning. 6534 */ 6535 int 6536 nfsvno_seek(struct nfsrv_descript *nd, struct vnode *vp, u_long cmd, 6537 off_t *offp, int content, bool *eofp, struct ucred *cred, NFSPROC_T *p) 6538 { 6539 struct nfsvattr at; 6540 int error, ret; 6541 6542 ASSERT_VOP_LOCKED(vp, "nfsvno_seek vp"); 6543 /* 6544 * Attempt to seek on a DS file. A return of ENOENT implies 6545 * there is no DS file to seek on. 6546 */ 6547 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SEEKDS, NULL, 6548 NULL, NULL, NULL, NULL, offp, content, eofp); 6549 if (error != ENOENT) { 6550 vput(vp); 6551 return (error); 6552 } 6553 6554 /* 6555 * Do the VOP_IOCTL() call. For the case where *offp == file_size, 6556 * VOP_IOCTL() will return ENXIO. However, the correct reply for 6557 * NFSv4.2 is *eofp == true and error == 0 for this case. 6558 */ 6559 NFSVOPUNLOCK(vp); 6560 error = VOP_IOCTL(vp, cmd, offp, 0, cred, p); 6561 *eofp = false; 6562 if (error == ENXIO || (error == 0 && cmd == FIOSEEKHOLE)) { 6563 /* Handle the cases where we might be at EOF. */ 6564 ret = nfsvno_getattr(vp, &at, nd, p, 0, NULL); 6565 if (ret == 0 && *offp == at.na_size) { 6566 *eofp = true; 6567 error = 0; 6568 } 6569 if (ret != 0 && error == 0) 6570 error = ret; 6571 } 6572 vrele(vp); 6573 NFSEXITCODE(error); 6574 return (error); 6575 } 6576 6577 /* 6578 * Allocate vnode op call. 6579 */ 6580 int 6581 nfsvno_allocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6582 NFSPROC_T *p) 6583 { 6584 int error; 6585 off_t olen; 6586 6587 ASSERT_VOP_ELOCKED(vp, "nfsvno_allocate vp"); 6588 /* 6589 * Attempt to allocate on a DS file. A return of ENOENT implies 6590 * there is no DS file to allocate on. 6591 */ 6592 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_ALLOCATE, NULL, 6593 NULL, NULL, NULL, NULL, &len, 0, NULL); 6594 if (error != ENOENT) 6595 return (error); 6596 6597 /* 6598 * Do the actual VOP_ALLOCATE(), looping so long as 6599 * progress is being made, to achieve completion. 6600 */ 6601 do { 6602 olen = len; 6603 error = VOP_ALLOCATE(vp, &off, &len, IO_SYNC, cred); 6604 if (error == 0 && len > 0 && olen > len) 6605 maybe_yield(); 6606 } while (error == 0 && len > 0 && olen > len); 6607 if (error == 0 && len > 0) 6608 error = NFSERR_IO; 6609 NFSEXITCODE(error); 6610 return (error); 6611 } 6612 6613 /* 6614 * Deallocate vnode op call. 6615 */ 6616 int 6617 nfsvno_deallocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6618 NFSPROC_T *p) 6619 { 6620 int error; 6621 off_t olen; 6622 6623 ASSERT_VOP_ELOCKED(vp, "nfsvno_deallocate vp"); 6624 /* 6625 * Attempt to deallocate on a DS file. A return of ENOENT implies 6626 * there is no DS file to deallocate on. 6627 */ 6628 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_DEALLOCATE, NULL, 6629 NULL, NULL, NULL, NULL, &len, 0, NULL); 6630 if (error != ENOENT) 6631 return (error); 6632 6633 /* 6634 * Do the actual VOP_DEALLOCATE(), looping so long as 6635 * progress is being made, to achieve completion. 6636 */ 6637 do { 6638 olen = len; 6639 error = VOP_DEALLOCATE(vp, &off, &len, 0, IO_SYNC, cred); 6640 if (error == 0 && len > 0 && olen > len) 6641 maybe_yield(); 6642 } while (error == 0 && len > 0 && olen > len); 6643 if (error == 0 && len > 0) 6644 error = NFSERR_IO; 6645 NFSEXITCODE(error); 6646 return (error); 6647 } 6648 6649 /* 6650 * Get Extended Atribute vnode op into an mbuf list. 6651 */ 6652 int 6653 nfsvno_getxattr(struct vnode *vp, char *name, uint32_t maxresp, 6654 struct ucred *cred, uint64_t flag, int maxextsiz, struct thread *p, 6655 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 6656 { 6657 struct iovec *iv; 6658 struct uio io, *uiop = &io; 6659 struct mbuf *m, *m2; 6660 int alen, error, len, tlen; 6661 size_t siz; 6662 6663 /* First, find out the size of the extended attribute. */ 6664 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6665 &siz, cred, p); 6666 if (error != 0) 6667 return (NFSERR_NOXATTR); 6668 if (siz > maxresp - NFS_MAXXDR) 6669 return (NFSERR_XATTR2BIG); 6670 len = siz; 6671 tlen = NFSM_RNDUP(len); 6672 if (tlen > 0) { 6673 /* 6674 * If cnt > MCLBYTES and the reply will not be saved, use 6675 * ext_pgs mbufs for TLS. 6676 * For NFSv4.0, we do not know for sure if the reply will 6677 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 6678 * Always use ext_pgs mbufs if ND_EXTPG is set. 6679 */ 6680 if ((flag & ND_EXTPG) != 0 || (tlen > MCLBYTES && 6681 (flag & (ND_TLS | ND_SAVEREPLY)) == ND_TLS && 6682 (flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4)) 6683 uiop->uio_iovcnt = nfsrv_createiovec_extpgs(tlen, 6684 maxextsiz, &m, &m2, &iv); 6685 else 6686 uiop->uio_iovcnt = nfsrv_createiovec(tlen, &m, &m2, 6687 &iv); 6688 uiop->uio_iov = iv; 6689 } else { 6690 uiop->uio_iovcnt = 0; 6691 uiop->uio_iov = iv = NULL; 6692 m = m2 = NULL; 6693 } 6694 uiop->uio_offset = 0; 6695 uiop->uio_resid = tlen; 6696 uiop->uio_rw = UIO_READ; 6697 uiop->uio_segflg = UIO_SYSSPACE; 6698 uiop->uio_td = p; 6699 #ifdef MAC 6700 error = mac_vnode_check_getextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6701 name); 6702 if (error != 0) 6703 goto out; 6704 #endif 6705 6706 if (tlen > 0) 6707 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6708 NULL, cred, p); 6709 if (error != 0) 6710 goto out; 6711 if (uiop->uio_resid > 0) { 6712 alen = tlen; 6713 len = tlen - uiop->uio_resid; 6714 tlen = NFSM_RNDUP(len); 6715 if (alen != tlen) 6716 printf("nfsvno_getxattr: weird size read\n"); 6717 if (tlen == 0) { 6718 m_freem(m); 6719 m = m2 = NULL; 6720 } else if (alen != tlen || tlen != len) 6721 m2 = nfsrv_adj(m, alen - tlen, tlen - len); 6722 } 6723 *lenp = len; 6724 *mpp = m; 6725 *mpendp = m2; 6726 6727 out: 6728 if (error != 0) { 6729 if (m != NULL) 6730 m_freem(m); 6731 *lenp = 0; 6732 } 6733 free(iv, M_TEMP); 6734 NFSEXITCODE(error); 6735 return (error); 6736 } 6737 6738 /* 6739 * Set Extended attribute vnode op from an mbuf list. 6740 */ 6741 int 6742 nfsvno_setxattr(struct vnode *vp, char *name, int len, struct mbuf *m, 6743 char *cp, struct ucred *cred, struct thread *p) 6744 { 6745 struct iovec *iv; 6746 struct uio uio, *uiop = &uio; 6747 int cnt, error; 6748 6749 error = 0; 6750 #ifdef MAC 6751 error = mac_vnode_check_setextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6752 name); 6753 #endif 6754 if (error != 0) 6755 goto out; 6756 6757 uiop->uio_rw = UIO_WRITE; 6758 uiop->uio_segflg = UIO_SYSSPACE; 6759 uiop->uio_td = p; 6760 uiop->uio_offset = 0; 6761 uiop->uio_resid = len; 6762 if (len > 0) { 6763 error = nfsrv_createiovecw(len, m, cp, &iv, &cnt); 6764 uiop->uio_iov = iv; 6765 uiop->uio_iovcnt = cnt; 6766 } else { 6767 uiop->uio_iov = iv = NULL; 6768 uiop->uio_iovcnt = 0; 6769 } 6770 if (error == 0) { 6771 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6772 cred, p); 6773 if (error == 0) { 6774 if (vp->v_type == VREG && nfsrv_devidcnt != 0) 6775 nfsvno_updateds(vp, cred, p); 6776 error = VOP_FSYNC(vp, MNT_WAIT, p); 6777 } 6778 free(iv, M_TEMP); 6779 } 6780 6781 out: 6782 NFSEXITCODE(error); 6783 return (error); 6784 } 6785 6786 /* 6787 * For a pNFS server, the DS file's ctime and 6788 * va_filerev (TimeMetadata and Change) needs to 6789 * be updated. This is a hack, but works by 6790 * flipping the S_ISGID bit in va_mode and then 6791 * flipping it back. 6792 * It does result in two MDS->DS RPCs, but creating 6793 * a custom RPC just to do this seems overkill, since 6794 * Setxattr/Rmxattr will not be done that frequently. 6795 * If it fails part way through, that is not too 6796 * serious, since the DS file is never executed. 6797 */ 6798 static void 6799 nfsvno_updateds(struct vnode *vp, struct ucred *cred, NFSPROC_T *p) 6800 { 6801 struct nfsvattr nva; 6802 int ret; 6803 u_short tmode; 6804 6805 ret = VOP_GETATTR(vp, &nva.na_vattr, cred); 6806 if (ret == 0) { 6807 tmode = nva.na_mode; 6808 NFSVNO_ATTRINIT(&nva); 6809 tmode ^= S_ISGID; 6810 NFSVNO_SETATTRVAL(&nva, mode, tmode); 6811 ret = nfsrv_proxyds(vp, 0, 0, cred, p, 6812 NFSPROC_SETATTR, NULL, NULL, NULL, &nva, 6813 NULL, NULL, 0, NULL); 6814 if (ret == 0) { 6815 tmode ^= S_ISGID; 6816 NFSVNO_SETATTRVAL(&nva, mode, tmode); 6817 ret = nfsrv_proxyds(vp, 0, 0, cred, p, 6818 NFSPROC_SETATTR, NULL, NULL, NULL, 6819 &nva, NULL, NULL, 0, NULL); 6820 } 6821 } 6822 } 6823 6824 /* 6825 * Remove Extended attribute vnode op. 6826 */ 6827 int 6828 nfsvno_rmxattr(struct nfsrv_descript *nd, struct vnode *vp, char *name, 6829 struct ucred *cred, struct thread *p) 6830 { 6831 int error; 6832 6833 /* 6834 * Get rid of any delegations. I am not sure why this is required, 6835 * but RFC-8276 says so. 6836 */ 6837 error = nfsrv_checkremove(vp, 0, nd, nd->nd_clientid, p); 6838 if (error != 0) 6839 goto out; 6840 #ifdef MAC 6841 error = mac_vnode_check_deleteextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6842 name); 6843 if (error != 0) 6844 goto out; 6845 #endif 6846 6847 error = VOP_DELETEEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, cred, p); 6848 if (error == EOPNOTSUPP) 6849 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6850 cred, p); 6851 if (error == 0) { 6852 if (vp->v_type == VREG && nfsrv_devidcnt != 0) 6853 nfsvno_updateds(vp, cred, p); 6854 error = VOP_FSYNC(vp, MNT_WAIT, p); 6855 } 6856 out: 6857 NFSEXITCODE(error); 6858 return (error); 6859 } 6860 6861 /* 6862 * List Extended Atribute vnode op into an mbuf list. 6863 */ 6864 int 6865 nfsvno_listxattr(struct vnode *vp, uint64_t cookie, struct ucred *cred, 6866 struct thread *p, u_char **bufp, uint32_t *lenp, bool *eofp) 6867 { 6868 struct iovec iv; 6869 struct uio io; 6870 int error; 6871 size_t siz; 6872 6873 *bufp = NULL; 6874 /* First, find out the size of the extended attribute. */ 6875 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, NULL, &siz, cred, 6876 p); 6877 if (error != 0) 6878 return (NFSERR_NOXATTR); 6879 if (siz <= cookie) { 6880 *lenp = 0; 6881 *eofp = true; 6882 goto out; 6883 } 6884 if (siz > cookie + *lenp) { 6885 siz = cookie + *lenp; 6886 *eofp = false; 6887 } else 6888 *eofp = true; 6889 /* Just choose a sanity limit of 10Mbytes for malloc(M_TEMP). */ 6890 if (siz > 10 * 1024 * 1024) { 6891 error = NFSERR_XATTR2BIG; 6892 goto out; 6893 } 6894 *bufp = malloc(siz, M_TEMP, M_WAITOK); 6895 iv.iov_base = *bufp; 6896 iv.iov_len = siz; 6897 io.uio_iovcnt = 1; 6898 io.uio_iov = &iv; 6899 io.uio_offset = 0; 6900 io.uio_resid = siz; 6901 io.uio_rw = UIO_READ; 6902 io.uio_segflg = UIO_SYSSPACE; 6903 io.uio_td = p; 6904 #ifdef MAC 6905 error = mac_vnode_check_listextattr(cred, vp, EXTATTR_NAMESPACE_USER); 6906 if (error != 0) 6907 goto out; 6908 #endif 6909 6910 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, &io, NULL, cred, 6911 p); 6912 if (error != 0) 6913 goto out; 6914 if (io.uio_resid > 0) 6915 siz -= io.uio_resid; 6916 *lenp = siz; 6917 6918 out: 6919 if (error != 0) { 6920 free(*bufp, M_TEMP); 6921 *bufp = NULL; 6922 } 6923 NFSEXITCODE(error); 6924 return (error); 6925 } 6926 6927 /* 6928 * Trim trailing data off the mbuf list being built. 6929 */ 6930 void 6931 nfsm_trimtrailing(struct nfsrv_descript *nd, struct mbuf *mb, char *bpos, 6932 int bextpg, int bextpgsiz) 6933 { 6934 vm_page_t pg; 6935 int fullpgsiz, i; 6936 6937 if (mb->m_next != NULL) { 6938 m_freem(mb->m_next); 6939 mb->m_next = NULL; 6940 } 6941 if ((mb->m_flags & M_EXTPG) != 0) { 6942 KASSERT(bextpg >= 0 && bextpg < mb->m_epg_npgs, 6943 ("nfsm_trimtrailing: bextpg out of range")); 6944 KASSERT(bpos == (char *)(void *) 6945 PHYS_TO_DMAP(mb->m_epg_pa[bextpg]) + PAGE_SIZE - bextpgsiz, 6946 ("nfsm_trimtrailing: bextpgsiz bad!")); 6947 6948 /* First, get rid of any pages after this position. */ 6949 for (i = mb->m_epg_npgs - 1; i > bextpg; i--) { 6950 pg = PHYS_TO_VM_PAGE(mb->m_epg_pa[i]); 6951 vm_page_unwire_noq(pg); 6952 vm_page_free(pg); 6953 } 6954 mb->m_epg_npgs = bextpg + 1; 6955 if (bextpg == 0) 6956 fullpgsiz = PAGE_SIZE - mb->m_epg_1st_off; 6957 else 6958 fullpgsiz = PAGE_SIZE; 6959 mb->m_epg_last_len = fullpgsiz - bextpgsiz; 6960 mb->m_len = m_epg_pagelen(mb, 0, mb->m_epg_1st_off); 6961 for (i = 1; i < mb->m_epg_npgs; i++) 6962 mb->m_len += m_epg_pagelen(mb, i, 0); 6963 nd->nd_bextpgsiz = bextpgsiz; 6964 nd->nd_bextpg = bextpg; 6965 } else 6966 mb->m_len = bpos - mtod(mb, char *); 6967 nd->nd_mb = mb; 6968 nd->nd_bpos = bpos; 6969 } 6970 6971 6972 /* 6973 * Check to see if a put file handle operation should test for 6974 * NFSERR_WRONGSEC, although NFSv3 actually returns NFSERR_AUTHERR. 6975 * When Open is the next operation, NFSERR_WRONGSEC cannot be 6976 * replied for the Open cases that use a component. This can 6977 * be identified by the fact that the file handle's type is VDIR. 6978 */ 6979 bool 6980 nfsrv_checkwrongsec(struct nfsrv_descript *nd, int nextop, enum vtype vtyp) 6981 { 6982 6983 if ((nd->nd_flag & ND_NFSV4) == 0) 6984 return (true); 6985 6986 if ((nd->nd_flag & ND_LASTOP) != 0) 6987 return (false); 6988 6989 if (nextop == NFSV4OP_PUTROOTFH || nextop == NFSV4OP_PUTFH || 6990 nextop == NFSV4OP_PUTPUBFH || nextop == NFSV4OP_RESTOREFH || 6991 nextop == NFSV4OP_LOOKUP || nextop == NFSV4OP_LOOKUPP || 6992 nextop == NFSV4OP_SECINFO || nextop == NFSV4OP_SECINFONONAME) 6993 return (false); 6994 if (nextop == NFSV4OP_OPEN && vtyp == VDIR) 6995 return (false); 6996 return (true); 6997 } 6998 6999 /* 7000 * Check DSs marked no space. 7001 */ 7002 void 7003 nfsrv_checknospc(void) 7004 { 7005 struct statfs *tsf; 7006 struct nfsdevice *ds; 7007 struct vnode **dvpp, **tdvpp, *dvp; 7008 char *devid, *tdevid; 7009 int cnt, error = 0, i; 7010 7011 if (nfsrv_devidcnt <= 0) 7012 return; 7013 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 7014 devid = malloc(nfsrv_devidcnt * NFSX_V4DEVICEID, M_TEMP, M_WAITOK); 7015 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 7016 7017 /* Get an array of the dvps for the DSs. */ 7018 tdvpp = dvpp; 7019 tdevid = devid; 7020 i = 0; 7021 NFSDDSLOCK(); 7022 /* First, search for matches for same file system. */ 7023 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7024 if (ds->nfsdev_nmp != NULL && ds->nfsdev_nospc) { 7025 if (++i > nfsrv_devidcnt) 7026 break; 7027 *tdvpp++ = ds->nfsdev_dvp; 7028 NFSBCOPY(ds->nfsdev_deviceid, tdevid, NFSX_V4DEVICEID); 7029 tdevid += NFSX_V4DEVICEID; 7030 } 7031 } 7032 NFSDDSUNLOCK(); 7033 7034 /* Do a VFS_STATFS() for each of the DSs and clear no space. */ 7035 cnt = i; 7036 tdvpp = dvpp; 7037 tdevid = devid; 7038 for (i = 0; i < cnt && error == 0; i++) { 7039 dvp = *tdvpp++; 7040 error = VFS_STATFS(dvp->v_mount, tsf); 7041 if (error == 0 && tsf->f_bavail > 0) { 7042 NFSD_DEBUG(1, "nfsrv_checknospc: reset nospc\n"); 7043 nfsrv_marknospc(tdevid, false); 7044 } 7045 tdevid += NFSX_V4DEVICEID; 7046 } 7047 free(tsf, M_TEMP); 7048 free(dvpp, M_TEMP); 7049 free(devid, M_TEMP); 7050 } 7051 7052 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 7053 7054 /* 7055 * Called once to initialize data structures... 7056 */ 7057 static int 7058 nfsd_modevent(module_t mod, int type, void *data) 7059 { 7060 int error = 0, i; 7061 static int loaded = 0; 7062 7063 switch (type) { 7064 case MOD_LOAD: 7065 if (loaded) 7066 goto out; 7067 newnfs_portinit(); 7068 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 7069 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 7070 MTX_DEF); 7071 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 7072 MTX_DEF); 7073 } 7074 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 7075 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 7076 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 7077 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 7078 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 7079 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 7080 callout_init(&nfsd_callout, 1); 7081 nfsrvd_initcache(); 7082 nfsd_init(); 7083 NFSD_LOCK(); 7084 nfsrvd_init(0); 7085 NFSD_UNLOCK(); 7086 nfsd_mntinit(); 7087 #ifdef VV_DISABLEDELEG 7088 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 7089 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 7090 #endif 7091 nfsd_call_nfsd = nfssvc_nfsd; 7092 loaded = 1; 7093 break; 7094 7095 case MOD_UNLOAD: 7096 if (newnfs_numnfsd != 0) { 7097 error = EBUSY; 7098 break; 7099 } 7100 7101 #ifdef VV_DISABLEDELEG 7102 vn_deleg_ops.vndeleg_recall = NULL; 7103 vn_deleg_ops.vndeleg_disable = NULL; 7104 #endif 7105 nfsd_call_nfsd = NULL; 7106 callout_drain(&nfsd_callout); 7107 7108 /* Clean out all NFSv4 state. */ 7109 nfsrv_throwawayallstate(curthread); 7110 7111 /* Clean the NFS server reply cache */ 7112 nfsrvd_cleancache(); 7113 7114 /* Free up the krpc server pool. */ 7115 if (nfsrvd_pool != NULL) 7116 svcpool_destroy(nfsrvd_pool); 7117 7118 /* and get rid of the locks */ 7119 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 7120 mtx_destroy(&nfsrchash_table[i].mtx); 7121 mtx_destroy(&nfsrcahash_table[i].mtx); 7122 } 7123 mtx_destroy(&nfsrc_udpmtx); 7124 mtx_destroy(&nfs_v4root_mutex); 7125 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 7126 mtx_destroy(&nfsrv_dontlistlock_mtx); 7127 mtx_destroy(&nfsrv_recalllock_mtx); 7128 for (i = 0; i < nfsrv_sessionhashsize; i++) 7129 mtx_destroy(&nfssessionhash[i].mtx); 7130 if (nfslayouthash != NULL) { 7131 for (i = 0; i < nfsrv_layouthashsize; i++) 7132 mtx_destroy(&nfslayouthash[i].mtx); 7133 free(nfslayouthash, M_NFSDSESSION); 7134 } 7135 lockdestroy(&nfsv4root_mnt.mnt_explock); 7136 free(nfsclienthash, M_NFSDCLIENT); 7137 free(nfslockhash, M_NFSDLOCKFILE); 7138 free(nfssessionhash, M_NFSDSESSION); 7139 loaded = 0; 7140 break; 7141 default: 7142 error = EOPNOTSUPP; 7143 break; 7144 } 7145 7146 out: 7147 NFSEXITCODE(error); 7148 return (error); 7149 } 7150 static moduledata_t nfsd_mod = { 7151 "nfsd", 7152 nfsd_modevent, 7153 NULL, 7154 }; 7155 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 7156 7157 /* So that loader and kldload(2) can find us, wherever we are.. */ 7158 MODULE_VERSION(nfsd, 1); 7159 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 7160 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 7161 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 7162 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 7163